From 5cb202d465e31ac07fb6c4fee6f02b623aefd682 Mon Sep 17 00:00:00 2001
From: itwanger <www.qing_gee@163.com>
Date: Sat, 11 Jun 2022 20:21:21 +0800
Subject: [PATCH] =?UTF-8?q?2022=E5=B9=B406=E6=9C=8811=E6=97=A5?=
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2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>心路历程</li></ul><meta property="keywords" content="心路历程"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 12 分钟</span><meta property="timeRequired" content="PT12M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/about-the-author/bzhan-10wan.html#一、清华大学在-github-上的开源课程" class="router-link-active router-link-exact-active toc-link level2">一、清华大学在 GitHub 上的开源课程</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/about-the-author/bzhan-10wan.html#二、学习-c语言" class="router-link-active router-link-exact-active toc-link level2">二、学习 C语言</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/about-the-author/bzhan-10wan.html#三、学习数据结构" class="router-link-active router-link-exact-active toc-link level2">三、学习数据结构</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/about-the-author/bzhan-10wan.html#四、走心总结" class="router-link-active router-link-exact-active toc-link level2">四、走心总结</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="我的第一个-10-万-b站视频播放" tabindex="-1"><a class="header-anchor" href="#我的第一个-10-万-b站视频播放" aria-hidden="true">#</a> 我的第一个，10 万(B站视频播放)</h1><p>恭喜这个 B。。。。。。站上的 UP，上一期视频播放量突破了 10 万！这也是二哥人生当中的第一次，凭借单条视频突破 10 万播放，必须得纪念下。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/bzhan-10wan-4f27a848-7dba-4cd3-a705-a6ef02162338.png" alt=""></p><p>从众多的宫斗剧中我得出了一条宝贵的人生经验：“母凭子贵”。这条经验同样适用于二哥本人，可能会因为这一期视频，吹这辈子最多的牛逼：这不，荣获哔哩哔哩第 3 周【校园优秀奖&amp;校园新星奖】。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/bzhan-10wan-340f1fe4-49f1-48c6-a972-c5da7de8ddd0.png" alt=""></p><p>我已经按捺不住激动的心情，在两万人的朋友圈大肆炫耀了。十万播放，对于百大 UP 来说，可能就是分分钟的事，可对于我这个（未来的） B站百大来说，苦苦等了 149 天！！！！！！！</p><p>这真是一个漫长的日子，鬼知道这些天我经历了什么。</p><p>我一度怀疑自己到底适不适合拍视频，表情的僵硬，普通话的塑料，甚至连自己一项引以为荣的台本，都觉得拉胯。</p><p>可就因为这个视频，让我重获新生，亢奋的心情一直在持续。我知道，一条视频的播放突破 10 万，并不意味着下一个视频也会有 10 万的播放，但好歹能让我感到幸福会，至少可以“厚颜无耻”地再吹一次牛皮吧！</p><p>昨天的文章里，承诺新的一年 2022 年把肝重新交给大家，我就会说到做到：这年头，职场就流行这个“沙雕”文化，<strong>你有没有能力不重要，重要的是领导交代你的有没有去执行</strong>。</p><p>二哥打算豁出去了！</p><p>新一期视频也上传到 B 站了，希望能借英雄哥的吉言，再爆一次。链接我放这里了：</p><blockquote><p>https://www.bilibili.com/video/BV1za411q79U/</p></blockquote><p>三不三连没关系，有关系的是不三连可能会对不起二哥的肝，所以还是三连吧，哈哈哈哈，瞧瞧我们这该死的生物钟，起这么早。。。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/bzhan-10wan-5a1d423e-8827-4a66-9197-4641ef0ecbaf.png" alt=""></p><p>接下来，上干货，我把这期 10万+ 播放的视频台本重新整理了一下，本来不想发的，很多小伙伴私信说二哥偏爱 B 站，同步都懒得同步了吗？</p><p>这不，赶紧发到公众号上来，希望学生党们现在立刻马上收藏起来，这个寒假你会过得非常充实；至于工作党嘛，像二哥这样的，既要工作，又要读书写作照顾家庭的，忙都忙死了，就算了吧！</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/bzhan-10wan-99073995-10b0-42ee-81e5-cc4abc26aa71.png" alt=""></p><p>啊，不，还是要稍微卷一卷吧，免得被那群还有半年就毕业的家伙们拍死在沙滩上。。。。</p><hr><p>二哥的读者当中有不少大学生，所以当知乎上刷到这个题目时：</p><blockquote><p>“学校课程规划的比较奇怪，大一上学期学c++，下学期学python，在寒假我是应该复习或预习课内内容（python，c++），还是自己对外拓展呢（c，数据结构）？”</p></blockquote><p>立马就冲上去答了一波。</p><p><strong>就冲这份爱学习的决心，三年后绝对互联网公司的 offer 拿到手软</strong>！</p><p>讲真，小伙伴学校安排的课程和我当年非常相似，也是大一上来就搞 Java，隔壁班上来就搞 C++，完全没有安排 C语言来过渡下。</p><p>所以我的建议是，<strong>趁寒假打打王者上上分吧</strong>！</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/bzhan-10wan-63412a28-7315-4ac4-a04b-a049b338c0d8.gif" alt=""></p><p>啊，不！<strong>趁寒假刷一波清华在 GitHub 上 20k+ star 的开源课程吧</strong>！</p><h2 id="一、清华大学在-github-上的开源课程" tabindex="-1"><a class="header-anchor" href="#一、清华大学在-github-上的开源课程" aria-hidden="true">#</a> 一、清华大学在 GitHub 上的开源课程</h2><blockquote><p>地址：https://github.com/PKUanonym/REKCARC-TSC-UHT</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/bzhan-10wan-c309fdb8-084c-44b1-bd8e-86a4b39cbb7b.png" alt=""></p><p>我来带小伙伴们过一下清华的课程安排哈，主要是针对计算机专业的。</p><p>大一上的计算机基础课程有：计算机科学导论、程序设计基础</p><p>大一下有：面向对象程序设计基础</p><p>大二上有：数据结构</p><p>大二下有：人工智能导论、计算机图形学基础、高性能计算导论</p><p>大三上有：计算机组成原理、计算机网络原理、编译原理、软件工程、数据库系统概论、人工神经网络、计算机网络安全技术、人机交互理论与技术</p><p>大三下有：操作系统、计算机系统结构、机器学习概论、数据挖掘、搜索引擎技术基础、存储技术基础、数据库专题训练、计算机网络专题训练。</p><p>大四主要是实践、实习、毕设等，剩下的计算机课程主要有网络安全工程与实践、嵌入式系统。</p><p>可以看得出，大一大二基本上是在摸鱼状态，大三突然开始发力，各种计算机基础课程，非常疯狂！</p><p>不过：</p><p>有志者事竟成，破釜沉舟，百二秦关终属楚；<br> 苦心人天不负，卧薪尝胆，三千越甲可吞吴！</p><h2 id="二、学习-c语言" tabindex="-1"><a class="header-anchor" href="#二、学习-c语言" aria-hidden="true">#</a> 二、学习 C语言</h2><p><strong>推荐一本书，两门视频课</strong>。</p><p>书是电子书，书名叫《阮一峰的 C语言入门课》，我第一时间就拜读了一遍，受益匪浅！可以说目前我见到的最好的 C语言入门教程了，没有之一！国内的绝大多数高校，大一都会安排 C 语言这门课，阮一峰了老师的这份《C语言入门教程》，绝对是福音。</p><p>视频课是浙江大学翁恺教授的，一门《C语言程序设计入门》，一门《C语言程序设计进阶》。</p><p>学完这些，大家至少能学会下面这幅思维导图中列出来的内容。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/bzhan-10wan-03e4f5b4-c756-401c-aada-695b9cfaf00d.png" alt=""></p><p>更多 C 语言的学习内容，可以戳下面这个链接，之前在公众号上发过了，这里就不再复制粘贴了：</p><p><a href="https://mp.weixin.qq.com/s/cZq24FJto2gJYWVhbhNBnQ" target="_blank" rel="noopener noreferrer">大一新生应该如何学习C语言，书上代码看不懂理解不了怎么办？<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><h2 id="三、学习数据结构" tabindex="-1"><a class="header-anchor" href="#三、学习数据结构" aria-hidden="true">#</a> 三、学习数据结构</h2><p>什么是数据结构？</p><blockquote><p>数据结构是一种具有一定逻辑关系，在计算机中应用某种存储结构，并且封装了相应操作的数据元素集合。它包含三方面的内容，逻辑关系、存储关系及操作。不同种类的数据结构适合于不同种类的应用，而部分甚至专门用于特定的作业任务。例如，计算机网络依赖于路由表运作，B 树高度适用于数据库的封装。</p></blockquote><p>菜鸟教程上对数据结构的定义我觉得还是蛮正式（官方）的，说人话就是，<strong>数据结构就是把一堆数据，按照某种格式揉成一坨</strong>。</p><p>大家喜欢吃宫保鸡丁吗？</p><p>反正我挺喜欢这道菜的。我就以宫保鸡丁为例，来讲一讲数据结构吧。维基百科上是这样定义的。</p><blockquote><p>宫保鸡丁（英语：Kung Pao chicken或Kung-Pao Chicken），又称宫爆鸡丁，呈糊辣荔枝味，源于黔菜、流传至鲁而后成于川菜的一道川味名菜。贵州、山东和四川三地对这道菜的做法不完全一样，称呼也有差异。贵州称为糊辣子鸡丁，山东则名为酱爆鸡丁，而四川是以宫保鸡丁为名的。</p></blockquote><p>来，抽象下宫保鸡丁。</p><div class="language-c ext-c line-numbers-mode"><pre class="language-c"><code><span class="token keyword">struct</span> <span class="token class-name">KungPaoChicken</span> <span class="token punctuation">{</span>
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data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 12 分钟</span><meta property="timeRequired" content="PT12M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/about-the-author/bzhan-10wan.html#一、清华大学在-github-上的开源课程" class="router-link-active router-link-exact-active toc-link level2">一、清华大学在 GitHub 上的开源课程</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/about-the-author/bzhan-10wan.html#二、学习-c语言" class="router-link-active router-link-exact-active toc-link level2">二、学习 C语言</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/about-the-author/bzhan-10wan.html#三、学习数据结构" class="router-link-active router-link-exact-active toc-link level2">三、学习数据结构</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/about-the-author/bzhan-10wan.html#四、走心总结" class="router-link-active router-link-exact-active toc-link level2">四、走心总结</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="我的第一个-10-万-b站视频播放" tabindex="-1"><a class="header-anchor" href="#我的第一个-10-万-b站视频播放" aria-hidden="true">#</a> 我的第一个，10 万(B站视频播放)</h1><p>恭喜这个 B。。。。。。站上的 UP，上一期视频播放量突破了 10 万！这也是二哥人生当中的第一次，凭借单条视频突破 10 万播放，必须得纪念下。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/bzhan-10wan-4f27a848-7dba-4cd3-a705-a6ef02162338.png" alt=""></p><p>从众多的宫斗剧中我得出了一条宝贵的人生经验：“母凭子贵”。这条经验同样适用于二哥本人，可能会因为这一期视频，吹这辈子最多的牛逼：这不，荣获哔哩哔哩第 3 周【校园优秀奖&amp;校园新星奖】。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/bzhan-10wan-340f1fe4-49f1-48c6-a972-c5da7de8ddd0.png" alt=""></p><p>我已经按捺不住激动的心情，在两万人的朋友圈大肆炫耀了。十万播放，对于百大 UP 来说，可能就是分分钟的事，可对于我这个（未来的） B站百大来说，苦苦等了 149 天！！！！！！！</p><p>这真是一个漫长的日子，鬼知道这些天我经历了什么。</p><p>我一度怀疑自己到底适不适合拍视频，表情的僵硬，普通话的塑料，甚至连自己一项引以为荣的台本，都觉得拉胯。</p><p>可就因为这个视频，让我重获新生，亢奋的心情一直在持续。我知道，一条视频的播放突破 10 万，并不意味着下一个视频也会有 10 万的播放，但好歹能让我感到幸福会，至少可以“厚颜无耻”地再吹一次牛皮吧！</p><p>昨天的文章里，承诺新的一年 2022 年把肝重新交给大家，我就会说到做到：这年头，职场就流行这个“沙雕”文化，<strong>你有没有能力不重要，重要的是领导交代你的有没有去执行</strong>。</p><p>二哥打算豁出去了！</p><p>新一期视频也上传到 B 站了，希望能借英雄哥的吉言，再爆一次。链接我放这里了：</p><blockquote><p>https://www.bilibili.com/video/BV1za411q79U/</p></blockquote><p>三不三连没关系，有关系的是不三连可能会对不起二哥的肝，所以还是三连吧，哈哈哈哈，瞧瞧我们这该死的生物钟，起这么早。。。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/bzhan-10wan-5a1d423e-8827-4a66-9197-4641ef0ecbaf.png" alt=""></p><p>接下来，上干货，我把这期 10万+ 播放的视频台本重新整理了一下，本来不想发的，很多小伙伴私信说二哥偏爱 B 站，同步都懒得同步了吗？</p><p>这不，赶紧发到公众号上来，希望学生党们现在立刻马上收藏起来，这个寒假你会过得非常充实；至于工作党嘛，像二哥这样的，既要工作，又要读书写作照顾家庭的，忙都忙死了，就算了吧！</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/bzhan-10wan-99073995-10b0-42ee-81e5-cc4abc26aa71.png" alt=""></p><p>啊，不，还是要稍微卷一卷吧，免得被那群还有半年就毕业的家伙们拍死在沙滩上。。。。</p><hr><p>二哥的读者当中有不少大学生，所以当知乎上刷到这个题目时：</p><blockquote><p>“学校课程规划的比较奇怪，大一上学期学c++，下学期学python，在寒假我是应该复习或预习课内内容（python，c++），还是自己对外拓展呢（c，数据结构）？”</p></blockquote><p>立马就冲上去答了一波。</p><p><strong>就冲这份爱学习的决心，三年后绝对互联网公司的 offer 拿到手软</strong>！</p><p>讲真，小伙伴学校安排的课程和我当年非常相似，也是大一上来就搞 Java，隔壁班上来就搞 C++，完全没有安排 C语言来过渡下。</p><p>所以我的建议是，<strong>趁寒假打打王者上上分吧</strong>！</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/bzhan-10wan-63412a28-7315-4ac4-a04b-a049b338c0d8.gif" alt=""></p><p>啊，不！<strong>趁寒假刷一波清华在 GitHub 上 20k+ star 的开源课程吧</strong>！</p><h2 id="一、清华大学在-github-上的开源课程" tabindex="-1"><a class="header-anchor" href="#一、清华大学在-github-上的开源课程" aria-hidden="true">#</a> 一、清华大学在 GitHub 上的开源课程</h2><blockquote><p>地址：https://github.com/PKUanonym/REKCARC-TSC-UHT</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/bzhan-10wan-c309fdb8-084c-44b1-bd8e-86a4b39cbb7b.png" alt=""></p><p>我来带小伙伴们过一下清华的课程安排哈，主要是针对计算机专业的。</p><p>大一上的计算机基础课程有：计算机科学导论、程序设计基础</p><p>大一下有：面向对象程序设计基础</p><p>大二上有：数据结构</p><p>大二下有：人工智能导论、计算机图形学基础、高性能计算导论</p><p>大三上有：计算机组成原理、计算机网络原理、编译原理、软件工程、数据库系统概论、人工神经网络、计算机网络安全技术、人机交互理论与技术</p><p>大三下有：操作系统、计算机系统结构、机器学习概论、数据挖掘、搜索引擎技术基础、存储技术基础、数据库专题训练、计算机网络专题训练。</p><p>大四主要是实践、实习、毕设等，剩下的计算机课程主要有网络安全工程与实践、嵌入式系统。</p><p>可以看得出，大一大二基本上是在摸鱼状态，大三突然开始发力，各种计算机基础课程，非常疯狂！</p><p>不过：</p><p>有志者事竟成，破釜沉舟，百二秦关终属楚；<br> 苦心人天不负，卧薪尝胆，三千越甲可吞吴！</p><h2 id="二、学习-c语言" tabindex="-1"><a class="header-anchor" href="#二、学习-c语言" aria-hidden="true">#</a> 二、学习 C语言</h2><p><strong>推荐一本书，两门视频课</strong>。</p><p>书是电子书，书名叫《阮一峰的 C语言入门课》，我第一时间就拜读了一遍，受益匪浅！可以说目前我见到的最好的 C语言入门教程了，没有之一！国内的绝大多数高校，大一都会安排 C 语言这门课，阮一峰了老师的这份《C语言入门教程》，绝对是福音。</p><p>视频课是浙江大学翁恺教授的，一门《C语言程序设计入门》，一门《C语言程序设计进阶》。</p><p>学完这些，大家至少能学会下面这幅思维导图中列出来的内容。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/bzhan-10wan-03e4f5b4-c756-401c-aada-695b9cfaf00d.png" alt=""></p><p>更多 C 语言的学习内容，可以戳下面这个链接，之前在公众号上发过了，这里就不再复制粘贴了：</p><p><a href="https://mp.weixin.qq.com/s/cZq24FJto2gJYWVhbhNBnQ" target="_blank" rel="noopener noreferrer">大一新生应该如何学习C语言，书上代码看不懂理解不了怎么办？<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><h2 id="三、学习数据结构" tabindex="-1"><a class="header-anchor" href="#三、学习数据结构" aria-hidden="true">#</a> 三、学习数据结构</h2><p>什么是数据结构？</p><blockquote><p>数据结构是一种具有一定逻辑关系，在计算机中应用某种存储结构，并且封装了相应操作的数据元素集合。它包含三方面的内容，逻辑关系、存储关系及操作。不同种类的数据结构适合于不同种类的应用，而部分甚至专门用于特定的作业任务。例如，计算机网络依赖于路由表运作，B 树高度适用于数据库的封装。</p></blockquote><p>菜鸟教程上对数据结构的定义我觉得还是蛮正式（官方）的，说人话就是，<strong>数据结构就是把一堆数据，按照某种格式揉成一坨</strong>。</p><p>大家喜欢吃宫保鸡丁吗？</p><p>反正我挺喜欢这道菜的。我就以宫保鸡丁为例，来讲一讲数据结构吧。维基百科上是这样定义的。</p><blockquote><p>宫保鸡丁（英语：Kung Pao chicken或Kung-Pao Chicken），又称宫爆鸡丁，呈糊辣荔枝味，源于黔菜、流传至鲁而后成于川菜的一道川味名菜。贵州、山东和四川三地对这道菜的做法不完全一样，称呼也有差异。贵州称为糊辣子鸡丁，山东则名为酱爆鸡丁，而四川是以宫保鸡丁为名的。</p></blockquote><p>来，抽象下宫保鸡丁。</p><div class="language-c ext-c line-numbers-mode"><pre class="language-c"><code><span class="token keyword">struct</span> <span class="token class-name">KungPaoChicken</span> <span class="token punctuation">{</span>
   鸡肉 <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token punctuation">]</span>
   花生 <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token punctuation">]</span>
   葱段 <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token punctuation">]</span>
@@ -58,6 +58,6 @@
   <span class="token punctuation">}</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>伪代码不是很严谨哈，大家理解这个意思就行了。</p><p>说到底，数据结构不过是一种抽象后的封装。像 Java，它之所以流行的一个很重要的原因，就是它提供了多种多样的、方便开发者调用的数据结构，比如说对数组的封装 ArrayList、对链表的封装 LinkedList、对哈希表的封装 HashMap、ConcurrentHashMap 等等。C 语言就没有这些，想用的话，就得自己封装。但 Java 和 C 语言的基本数据类型是一致的，int、float 这些都是相通的。</p><p>对于初学者来说，平常敲代码都是直接去调用数据结构的，是很少去想这些数据结构是怎么实现的。</p><p>当一个初学者向高级程序员迈进的时候，就必须得静下心来，去搞清楚 ArrayList 和 LinkedList 的内部实现，搞清楚之后就会明白，之所以它们在增删改查的时候性能上有差异，就是因为它们的内部使用了不同的数据结构所导致的。</p><p>有一说一，我在 2008 年刚学 Java 的那会，真的是不理解，为什么明明有了 ArrayList，Java 还要设计 LinkedList，不都是集合嘛！</p><p>害！</p><p><strong>数据结构为什么这么重要？</strong></p><p>我直接放大招吧，甩一段清华大学计算机系教授邓俊辉老师话吧。</p><blockquote><p>数据结构是计算机科学的关键内容，也是构建高效算法的必要基础。其中涉及的知识，在相关专业的课程系统中始终处于核心位置。以 ACM/IEEE Computing Curricula（计算机教学大纲）为例，其中对于几个相关专业（计算机科学、计算机工程、信息系统、信息技术、软件工程）的共同要求中，数据结构与算法作为程序设计概念与技能的核心，紧随在数学之后，排在第二位。</p></blockquote><p>数据结构说复杂也不复杂，说简单也不简单，这不重要，重要的是必须得学！</p><p>有小伙伴可能会问，“我数学学的不好，学数据结构能学会吗？”</p><p>说句实在话，数据结构和数学之间没有必然的关系。<strong>我上小学的时候，参加过洛阳市的奥林匹克数学竞赛，还得了三等奖</strong>（偷偷地加个粗）；初中的时候，数学成绩也一直保持得不错，但上了高中之后，由于贪玩，数学成绩一落千丈，成了瘸腿课。大学的时候对离散数学、微积分这些更是头大。</p><p>但这并不妨碍我学习数据结构，真的。数据结构中，树算是最难的一块了，像数组、链表、栈、哈希表这些相对来说，计算机专业的，只要稍微下点功夫，都是能掌握的。</p><p>说了这么多，<strong>数据结构到底该怎么学呢？</strong></p><p>如果你有 C/C++ 的底子，我给推荐两本书。</p><p>第一本，《趣学数据结构》</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/bzhan-10wan-bd02be2f-ae71-413f-b0c0-0050fee0e2b5.png" alt=""></p><p>说到这，多说一嘴。2018 年的时候，人民邮电出版社的张老师邀请我出一本 Java 方面的书，我当时想命名为《趣学 Java》。张老师说，刚好之前和陈小玉老师合作出了一本《趣学算法》的书，要不发一本你看看吧。</p><p>你别说，这本书还挺适合拿来作为算法的入门书呢。后来，陈小玉老师又出了一本新书，叫《趣学数据结构》，我看了，虽然离“趣”字有点距离，但很适合作为一门数据结构方面的入门书。</p><p>第二本，《数据结构（C++语言版）》</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/bzhan-10wan-de28bb8a-ddb6-4b73-b132-ebf5e507fdbe.png" alt=""></p><p>对，清华大学邓俊辉教授编著的，豆瓣评分也蛮高的。这本书还配套了视频课程，是免费的，可以在学堂在线上看，我之前也有推荐过。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/bzhan-10wan-15de0615-3d9c-4bdc-bedb-4165ac6f4802.png" alt=""></p><p>课程质量木得说，算是国家级精品课了。大家有时间的话，一定要刷一遍。</p><blockquote><p>视频地址：https://www.xuetangx.com/course/THU08091000384/7755489</p></blockquote><p>对了，还有浙江大学陈越姥姥的视频课：</p><blockquote><p>视频地址：https://www.bilibili.com/video/BV1JW411i731</p></blockquote><p>如果你有 Java 的底子，我也给推荐两本书。</p><p>第一本，《数据结构与算法分析（Java 语言描述）》</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/bzhan-10wan-1672e79d-a576-4a24-bc60-ced47b692a0f.png" alt=""></p><p>虽然翻译得不怎么样，但内容很全面，适合拿来作为一本数据结构的入门书。</p><p>第二本，《算法（第 4 版）》</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/bzhan-10wan-9e260fc8-69fa-4dfa-82c6-9d6b1d7027e5.png" alt=""></p><p>虽然名为算法，但大家都知道，算法是基于数据结构的，数组、队列、栈、堆、二叉树、哈希表等等，这些数据结构都讲到了。</p><p>如果时间比较紧的话，C/C++ 程序员只看《数据结构（C++语言版）》就行了，Java 程序员只看《算法（第 4 版）》就行了。如果一遍没看懂的话，再看一遍就好了。</p><p>有网友“三色院堇子的老公”说得好。</p><blockquote><p>数据结构就是你已经写了几百万行，然后数据结构减到 90 万行，性能还翻倍，嗯，终于学会了！</p></blockquote><h2 id="四、走心总结" tabindex="-1"><a class="header-anchor" href="#四、走心总结" aria-hidden="true">#</a> 四、走心总结</h2><p>2022 年 1 月份，很有必要开个好头。</p><p>那么趁寒假刷一波清华在 GitHub 上的开源课程，还有 C语言和数据结构，寒假过后，绝壁是卷王中的卷王。</p><p>悄悄地告诉大家一声，很多说放假了一定要打打游戏，一定要放松下，这些人都在悄悄地卷。</p><p>所以说，如果你是正在放松的那个，可要小心了！</p><p>不要一个寒假就被甩开了差距。</p><p>工作党其实也一样，适当放松，时刻警惕，该学的时候还是要能支棱起来。</p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/about-the-author/bzhan-10wan.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path 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2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>心路历程</li></ul><meta property="keywords" content="心路历程"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 10 分钟</span><meta property="timeRequired" content="PT10M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/about-the-author/csdn-1000wan.html#一、追忆往事" class="router-link-active router-link-exact-active toc-link level3">一、追忆往事</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/about-the-author/csdn-1000wan.html#二、有点遗憾" class="router-link-active router-link-exact-active toc-link level3">二、有点遗憾</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/about-the-author/csdn-1000wan.html#三、新的憧憬" class="router-link-active router-link-exact-active toc-link level3">三、新的憧憬</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/about-the-author/csdn-1000wan.html#四、最后的祝福" class="router-link-active router-link-exact-active toc-link level3">四、最后的祝福</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="我的第二个-一千万-csdn阅读" tabindex="-1"><a class="header-anchor" href="#我的第二个-一千万-csdn阅读" aria-hidden="true">#</a> 我的第二个，一千万！CSDN阅读</h1><p>大家好，我是二哥呀！</p><p>离<a href="https://mp.weixin.qq.com/s/8AylY_3EA5wWaKKU-qvDYw" target="_blank" rel="noopener noreferrer">上一个一千万<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，还是上一次。</p><p>我努力的回想着，回想自己在 2021 年做出了哪些耀眼的成绩，正襟危坐，回想良久，也只想到这最后一件：<strong>CSDN 的博文访问量也突破了一千万</strong>。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/csdn-1000wan-2627c2a4-46c1-49a9-b86f-607c65ba6398.png" alt=""></p><p>但这算不算得上是成绩，很难说，因为喜欢这个平台的人有很多，不喜欢这个平台的也有很多。也许，GitHub 上有 110k+ star 的 JavaGuide 的话最具有说服力了，这个平台不规范转载的很多，垃圾资源下载的很多，但也有几个优秀的作者撑起了 CSDN 的半边天，二哥就是其中一个。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/csdn-1000wan-a7c74449-7183-453f-8286-92d0bfe0a56d.png" alt=""></p><p>老读者都知道，我是从2014 年，开始坚持写技术博客的。一开始，还没敢在 CSDN 上写，只敢在 JavaEye 上写（估计很多新读者都不太知道这个平台）。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/csdn-1000wan-43677bfa-bdd6-4c3b-aa67-3a3277dc3575.png" alt=""></p><p>那时候的 JavaEye 真的是非常非常非常的纯粹（比博客园更纯粹），没有任何商业广告，还时不时送送书，头部作者有 fastjson 的作者温少，《亿级流量网站架构核心技术》作者开涛，想必做技术的大家应该都知道他们俩。</p><p>后来胆子大了，就开始在 CSDN 上写，当时认识的头部作者有安晓辉、浅墨（毛星云）、杨秀璋等等。</p><p>就这样写着写着，我成了 CSDN 的博客专家，出版了一本技术图书，成为了两届博客之星。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/csdn-1000wan-5137a245-035e-4e36-ba04-2b06fae275e1.png" alt=""></p><p>就这样写着写着，我遇到了越来越多的读者，给他们提供帮助的同时，也成为了他们前进的动力。</p><p>据我自己的不完全统计，2021 年，我在朋友圈和公众号送出去了超过 200 本技术图书，每次我都会留个小心机，问中奖的读者是怎么认识二哥的，有没有什么建议，留言中竟然很多都来自 CSDN，这让我又惊又喜。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/csdn-1000wan-11df1e5d-2505-416c-949a-607b4ebbc61f.png" alt=""></p><p>经常有读者夸赞二哥好有写作的天赋啊，其实哪里是有天赋，纯粹是因为写得多，所以才写得好。我现在的文笔，讲真，还不如上高中那会，那会才是真的笔下生花，诗都能写得出来，情书就更不用说了。</p><p>等过年的时候吧，我把那些尘封多年的文字贴出来给大家瞧瞧。</p><h3 id="一、追忆往事" tabindex="-1"><a class="header-anchor" href="#一、追忆往事" aria-hidden="true">#</a> 一、追忆往事</h3><p>借这个机会，和大家一起坐上时光机重温一下往事吧。翻看相册，2021 年，还真有不少令人感动的瞬间，太多太多了，我就每个月挑一件吧。</p><p>1 月 13 日，我和妹妹在小叔家的房顶上自拍。</p><p>2 月 15 日，我和奶奶的合影。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/csdn-1000wan-14d7737b-7324-4717-bd16-a3da7f2b1223.png" alt=""></p><p>3 月 26 日，读者考上研究生了，特意发来祝贺。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/csdn-1000wan-63626ad5-8580-4565-a0da-af3a0bf43875.png" alt=""></p><p>4 月 3 日，和教练小姐姐在健身房合影。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/csdn-1000wan-eb256e24-de8a-49d0-a6ef-eb6d0b8d28e7.png" alt=""></p><p>5 月 25 日，二哥的读者群体扩大了台湾省。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/csdn-1000wan-b2a8a63c-8c8f-4d39-9a9f-acf54c908058.png" alt=""></p><p>6 月 13 日，和家人畅游青岛。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/csdn-1000wan-b430951d-544c-4743-b700-3c71a854267a.png" alt=""></p><p>7 月 20 日，被某某女粉追着要联系方式。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/csdn-1000wan-d7e127c5-5560-45c0-87c8-4cea924047cd.png" alt=""></p><p>8 月 21 日，在十八线县城的老家砸核桃吃。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/csdn-1000wan-944b3f88-86ab-4e86-aeb6-4ad1f4f1ece3.png" alt=""></p><p>9 月 23 日，收到掘金和 CSDN 寄来的月饼。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/csdn-1000wan-0056fcd2-afa4-475e-ad69-95b84b90b8c7.png" alt=""></p><p>10 月 11 日，收到《Java 程序员进阶之路》专栏在 GitHub 上开源以来的两笔大额打赏。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/csdn-1000wan-7e6d9918-6d94-45ef-9afa-42882f79944d.png" alt=""></p><p>11 月 6 日，和四位河科大的学弟撸完串后在校园里的合影。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/csdn-1000wan-0c1b3624-f4e5-4e0c-b119-0ef4d440a60d.png" alt=""></p><p>12 月 27 日，CSDN 生成的年度报告。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/csdn-1000wan-a070af45-bfeb-4b1a-9b29-745279a4a0fc.png" alt=""></p><p>不知道大家的 2021 过得怎么样？</p><ul><li>充实？</li><li>落魄？</li><li>上进？</li><li>消极？</li><li>幸福？</li><li>悲伤？</li></ul><p>我个人的感受是<strong>平淡中有一点点小确幸，平凡中有一点点小进步</strong>，这也许就是普通人最真实的写照了吧？</p><h3 id="二、有点遗憾" tabindex="-1"><a class="header-anchor" href="#二、有点遗憾" aria-hidden="true">#</a> 二、有点遗憾</h3><p>一年时间过得可真快，有很多想做好的事情，到最后都差了点意思。就说一件吧，B 站的视频播放量没有达到预期。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/csdn-1000wan-83e7cfbc-496d-45e8-bfd6-cd0d1dfc60d3.png" alt=""></p><p>8 月份还能坚持一周输出一个，从一开始面对镜头时的恐惧，到慢慢接纳自己。但好景不长，9 月份的时候，视频播放量呈现下降趋势，我就开始胡思乱想了。</p><ul><li>是不是自己不适合拍视频啊？</li><li>是不是自己表达的不够有趣啊？</li><li>是不是剪辑没剪好啊？</li></ul><p>这种心态其实很正常，但往往这种心态又会影响下一个视频的创作，就失去了正向的反馈。</p><p>于是后面就渐渐变成了一个月一个视频，但视频播放并没有任何的起色。</p><p>读者群体里有不少爱好写作的小伙伴，应该都能感受到这种困惑，当你辛辛苦苦创作出来的作品得不到认可的时候，就容易陷入自我怀疑当中，对于这一点，二哥也不例外。</p><p>所以，这里就拜托大家了，<strong>如果你是二哥的铁粉，看到二哥发了 B 站的视频，赶紧跑去三连支持下，火钳刘明</strong>。三连也是鼓励二哥创作出更多优质视频的最强动力了。</p><p>不管怎么样，2022 年，我会改变心态，继续坚持录制视频，<strong>因为普通人想要闯出一片天地，唯有坚持不懈和不断改进</strong>。</p><p>有志者，事竟成，破釜沉舟，百二秦关终属楚； 苦心人，天不负，卧薪尝胆，三千越甲可吞吴。</p><p>B 站我一定做到一万粉——这个 flag 不能到。</p><p>人这一辈子，很难事事顺心，也很难做什么事都成什么事。总是会遇到一些挫折，重要的是，遇到挫折的时候，如何破局走出来，这才是最重要的。</p><p>俗称抗压能力。</p><p>时不时会有一些读者问我：</p><ul><li>“我秋招失败了，怎么办？”</li><li>“我考研失败了，怎么办？”</li><li>“我被公司裁了，怎么办？”</li><li>“我无法晋升了，怎么办？”</li></ul><p>大局观上来说，最好的办法就是接纳自己，接纳自己的失败。</p><ul><li>秋招失败了，就准备春招，总结一波秋招发挥失误的点是什么，然后在春招前补上。</li><li>考研失败了，要么二战，要么就找一份工作，开辟新的战场。</li><li>被公司裁了就所要赔偿，然后赶紧准备简历，找新的工作，不要在过去的失意中沉沦。</li><li>找一找没办法晋升的原因是什么，是因为得罪了领导，是因为技术没跟上，职场遇到瓶颈了，要么降低预期，要么猥琐发育等下一波机会，要么跳槽。</li></ul><p>拿我自己的 B 站视频来说，应对办法有两个，第一个就是加量，在不断的试错中找出观众喜欢的点和角度；第二个就是提高视频的质量，包括创意、表达方式、后期剪辑等。</p><p>有点遗憾不要紧，要紧的是被遗憾击垮！</p><p>如果你在 2021 年遇到了不开心，遇到了挫折，请给自己多一点时间。像二哥，不也一样有做不成功的时候嘛，我们都是平凡人，不卑不亢地接纳自己就会有新的起色。</p><h3 id="三、新的憧憬" tabindex="-1"><a class="header-anchor" href="#三、新的憧憬" aria-hidden="true">#</a> 三、新的憧憬</h3><p>展望 2022 年，有太多的期待了。</p><p>这不，新的惊喜就是《Java 程序员进阶之路》专栏第一次上了 GitHub 的 trending 榜单！</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/csdn-1000wan-8868c50f-d622-4f1f-a92b-13cf95edd786.png" alt=""></p><p>正应了那句话，功夫不负有心人。</p><p>对于这个开源专栏，我投入了大量的心血，一开始的名字叫《教妹学 Java》，主打 Java 的入门级路线，一直连载了近 100篇原创内容。</p><p>后来有朋友建议我，要想走国际化的话，就必须得换个名字，得和国际接轨，于是我就想破脑袋，征求了很多朋友的建议，改成这个《Java 程序员进阶之路》了，因为我之前出版过一本技术书《Web 全栈开发进阶之路》，叫这个名字刚好也非常适合。</p><p>英文名字叫 toBeBetterJavaer， 前后呼应，一气呵成。</p><p>立个 flag 吧，<strong>2022 年，冲 5000 star</strong>！</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/csdn-1000wan-5ebc2c65-f342-45f9-aaf6-7f663b5406b8.png" alt=""></p><p>这个 flag 绝不能倒！</p><p>还有一件事，就是我打算共建一个知识星球，因为每天过来咨询二哥问题的读者实在是太多了，导致回复速度变得很慢，效率不高。</p><p>如果能建一个知识星球，把这些问题的答案全部沉淀下来，隔断时间整理一波 PDF，就美滋滋了。</p><p>目前规划的方向有：</p><ul><li>offer 咨询</li><li>职业规划</li><li>简历优化</li><li>资源分享</li><li>打卡共进</li><li>助学活动</li></ul><p>打算趁过年的这段时间好好的规划一下，列一个详细的清单出来，到时候如果有意愿加入的话，到时候可以来参与一波。</p><p>俗话说，一个好汉三个帮，一个篱笆三个桩，大家在一起学习沉淀的话，效率也会比较高，信息差也会被抹平。</p><p>最后一件事就是，我希望有更多的时间陪陪家人。虽然二哥在三线城市，但业余时间基本上全部用来输入输出了。</p><p>当然了，比起在一线城市打拼的大家伙，二哥陪家人的时间肯定会多一些，但我总觉得不够。毕竟我们无论处于什么阶段，挣多少钱，终归是希望我们家人能过上更好一点的生活。</p><p>否则，我们奋斗拼搏加班卖命的工作，又图什么呢？</p><p>这恐怕也是二哥宁愿在三线城市待着的最大原因了，人活着只有一次，而最亲的人，就是家人，二哥还是一个比较腻在家人身边的人。</p><p>我也希望，大家能在 2022 年找到心爱的人，找到的就更进一步，有家就有烟火味，你奋斗的一切都会显得很值得。</p><h3 id="四、最后的祝福" tabindex="-1"><a class="header-anchor" href="#四、最后的祝福" aria-hidden="true">#</a> 四、最后的祝福</h3><p>如果你是学生党，希望课堂上的你，能够认认真真听讲；如果老师的课实在没意思，网上有很多优质的公开资源，可参考<a href="https://mp.weixin.qq.com/s/Wgedf4ZH3_zJXxFxyPPyNQ" target="_blank" rel="noopener noreferrer">该死！B 站上这些 Java 视频真香！<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><p>还有就是逢考必过，追 TA 必到手。</p><p>如果你是工作党，希望工作中的你，不被甩锅，蒸蒸日上；如果事业上遇到瓶颈了，不妨拓展一门副业，给自己打开一扇窗。</p><p>还有就是绩效必 A，跳槽涨薪美滋滋。</p><p>就这吧！</p><p>如果可以的话，大家可以在评论区刷一波，<strong>二哥牛逼，2022 我们一起飞</strong>~~</p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/about-the-author/csdn-1000wan.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg 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33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月18日</span><meta property="datePublished" content="2022-03-18T02:19:22.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 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10 分钟</span><meta property="timeRequired" content="PT10M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/about-the-author/csdn-1000wan.html#一、追忆往事" class="router-link-active router-link-exact-active toc-link level3">一、追忆往事</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/about-the-author/csdn-1000wan.html#二、有点遗憾" class="router-link-active router-link-exact-active toc-link level3">二、有点遗憾</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/about-the-author/csdn-1000wan.html#三、新的憧憬" class="router-link-active router-link-exact-active toc-link level3">三、新的憧憬</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/about-the-author/csdn-1000wan.html#四、最后的祝福" class="router-link-active router-link-exact-active toc-link level3">四、最后的祝福</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="我的第二个-一千万-csdn阅读" tabindex="-1"><a class="header-anchor" href="#我的第二个-一千万-csdn阅读" aria-hidden="true">#</a> 我的第二个，一千万！CSDN阅读</h1><p>大家好，我是二哥呀！</p><p>离<a href="https://mp.weixin.qq.com/s/8AylY_3EA5wWaKKU-qvDYw" target="_blank" rel="noopener noreferrer">上一个一千万<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，还是上一次。</p><p>我努力的回想着，回想自己在 2021 年做出了哪些耀眼的成绩，正襟危坐，回想良久，也只想到这最后一件：<strong>CSDN 的博文访问量也突破了一千万</strong>。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/csdn-1000wan-2627c2a4-46c1-49a9-b86f-607c65ba6398.png" alt=""></p><p>但这算不算得上是成绩，很难说，因为喜欢这个平台的人有很多，不喜欢这个平台的也有很多。也许，GitHub 上有 110k+ star 的 JavaGuide 的话最具有说服力了，这个平台不规范转载的很多，垃圾资源下载的很多，但也有几个优秀的作者撑起了 CSDN 的半边天，二哥就是其中一个。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/csdn-1000wan-a7c74449-7183-453f-8286-92d0bfe0a56d.png" alt=""></p><p>老读者都知道，我是从2014 年，开始坚持写技术博客的。一开始，还没敢在 CSDN 上写，只敢在 JavaEye 上写（估计很多新读者都不太知道这个平台）。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/csdn-1000wan-43677bfa-bdd6-4c3b-aa67-3a3277dc3575.png" alt=""></p><p>那时候的 JavaEye 真的是非常非常非常的纯粹（比博客园更纯粹），没有任何商业广告，还时不时送送书，头部作者有 fastjson 的作者温少，《亿级流量网站架构核心技术》作者开涛，想必做技术的大家应该都知道他们俩。</p><p>后来胆子大了，就开始在 CSDN 上写，当时认识的头部作者有安晓辉、浅墨（毛星云）、杨秀璋等等。</p><p>就这样写着写着，我成了 CSDN 的博客专家，出版了一本技术图书，成为了两届博客之星。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/csdn-1000wan-5137a245-035e-4e36-ba04-2b06fae275e1.png" alt=""></p><p>就这样写着写着，我遇到了越来越多的读者，给他们提供帮助的同时，也成为了他们前进的动力。</p><p>据我自己的不完全统计，2021 年，我在朋友圈和公众号送出去了超过 200 本技术图书，每次我都会留个小心机，问中奖的读者是怎么认识二哥的，有没有什么建议，留言中竟然很多都来自 CSDN，这让我又惊又喜。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/csdn-1000wan-11df1e5d-2505-416c-949a-607b4ebbc61f.png" alt=""></p><p>经常有读者夸赞二哥好有写作的天赋啊，其实哪里是有天赋，纯粹是因为写得多，所以才写得好。我现在的文笔，讲真，还不如上高中那会，那会才是真的笔下生花，诗都能写得出来，情书就更不用说了。</p><p>等过年的时候吧，我把那些尘封多年的文字贴出来给大家瞧瞧。</p><h3 id="一、追忆往事" tabindex="-1"><a class="header-anchor" href="#一、追忆往事" aria-hidden="true">#</a> 一、追忆往事</h3><p>借这个机会，和大家一起坐上时光机重温一下往事吧。翻看相册，2021 年，还真有不少令人感动的瞬间，太多太多了，我就每个月挑一件吧。</p><p>1 月 13 日，我和妹妹在小叔家的房顶上自拍。</p><p>2 月 15 日，我和奶奶的合影。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/csdn-1000wan-14d7737b-7324-4717-bd16-a3da7f2b1223.png" alt=""></p><p>3 月 26 日，读者考上研究生了，特意发来祝贺。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/csdn-1000wan-63626ad5-8580-4565-a0da-af3a0bf43875.png" alt=""></p><p>4 月 3 日，和教练小姐姐在健身房合影。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/csdn-1000wan-eb256e24-de8a-49d0-a6ef-eb6d0b8d28e7.png" alt=""></p><p>5 月 25 日，二哥的读者群体扩大了台湾省。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/csdn-1000wan-b2a8a63c-8c8f-4d39-9a9f-acf54c908058.png" alt=""></p><p>6 月 13 日，和家人畅游青岛。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/csdn-1000wan-b430951d-544c-4743-b700-3c71a854267a.png" alt=""></p><p>7 月 20 日，被某某女粉追着要联系方式。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/csdn-1000wan-d7e127c5-5560-45c0-87c8-4cea924047cd.png" alt=""></p><p>8 月 21 日，在十八线县城的老家砸核桃吃。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/csdn-1000wan-944b3f88-86ab-4e86-aeb6-4ad1f4f1ece3.png" alt=""></p><p>9 月 23 日，收到掘金和 CSDN 寄来的月饼。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/csdn-1000wan-0056fcd2-afa4-475e-ad69-95b84b90b8c7.png" alt=""></p><p>10 月 11 日，收到《Java 程序员进阶之路》专栏在 GitHub 上开源以来的两笔大额打赏。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/csdn-1000wan-7e6d9918-6d94-45ef-9afa-42882f79944d.png" alt=""></p><p>11 月 6 日，和四位河科大的学弟撸完串后在校园里的合影。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/csdn-1000wan-0c1b3624-f4e5-4e0c-b119-0ef4d440a60d.png" alt=""></p><p>12 月 27 日，CSDN 生成的年度报告。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/csdn-1000wan-a070af45-bfeb-4b1a-9b29-745279a4a0fc.png" alt=""></p><p>不知道大家的 2021 过得怎么样？</p><ul><li>充实？</li><li>落魄？</li><li>上进？</li><li>消极？</li><li>幸福？</li><li>悲伤？</li></ul><p>我个人的感受是<strong>平淡中有一点点小确幸，平凡中有一点点小进步</strong>，这也许就是普通人最真实的写照了吧？</p><h3 id="二、有点遗憾" tabindex="-1"><a class="header-anchor" href="#二、有点遗憾" aria-hidden="true">#</a> 二、有点遗憾</h3><p>一年时间过得可真快，有很多想做好的事情，到最后都差了点意思。就说一件吧，B 站的视频播放量没有达到预期。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/csdn-1000wan-83e7cfbc-496d-45e8-bfd6-cd0d1dfc60d3.png" alt=""></p><p>8 月份还能坚持一周输出一个，从一开始面对镜头时的恐惧，到慢慢接纳自己。但好景不长，9 月份的时候，视频播放量呈现下降趋势，我就开始胡思乱想了。</p><ul><li>是不是自己不适合拍视频啊？</li><li>是不是自己表达的不够有趣啊？</li><li>是不是剪辑没剪好啊？</li></ul><p>这种心态其实很正常，但往往这种心态又会影响下一个视频的创作，就失去了正向的反馈。</p><p>于是后面就渐渐变成了一个月一个视频，但视频播放并没有任何的起色。</p><p>读者群体里有不少爱好写作的小伙伴，应该都能感受到这种困惑，当你辛辛苦苦创作出来的作品得不到认可的时候，就容易陷入自我怀疑当中，对于这一点，二哥也不例外。</p><p>所以，这里就拜托大家了，<strong>如果你是二哥的铁粉，看到二哥发了 B 站的视频，赶紧跑去三连支持下，火钳刘明</strong>。三连也是鼓励二哥创作出更多优质视频的最强动力了。</p><p>不管怎么样，2022 年，我会改变心态，继续坚持录制视频，<strong>因为普通人想要闯出一片天地，唯有坚持不懈和不断改进</strong>。</p><p>有志者，事竟成，破釜沉舟，百二秦关终属楚； 苦心人，天不负，卧薪尝胆，三千越甲可吞吴。</p><p>B 站我一定做到一万粉——这个 flag 不能到。</p><p>人这一辈子，很难事事顺心，也很难做什么事都成什么事。总是会遇到一些挫折，重要的是，遇到挫折的时候，如何破局走出来，这才是最重要的。</p><p>俗称抗压能力。</p><p>时不时会有一些读者问我：</p><ul><li>“我秋招失败了，怎么办？”</li><li>“我考研失败了，怎么办？”</li><li>“我被公司裁了，怎么办？”</li><li>“我无法晋升了，怎么办？”</li></ul><p>大局观上来说，最好的办法就是接纳自己，接纳自己的失败。</p><ul><li>秋招失败了，就准备春招，总结一波秋招发挥失误的点是什么，然后在春招前补上。</li><li>考研失败了，要么二战，要么就找一份工作，开辟新的战场。</li><li>被公司裁了就所要赔偿，然后赶紧准备简历，找新的工作，不要在过去的失意中沉沦。</li><li>找一找没办法晋升的原因是什么，是因为得罪了领导，是因为技术没跟上，职场遇到瓶颈了，要么降低预期，要么猥琐发育等下一波机会，要么跳槽。</li></ul><p>拿我自己的 B 站视频来说，应对办法有两个，第一个就是加量，在不断的试错中找出观众喜欢的点和角度；第二个就是提高视频的质量，包括创意、表达方式、后期剪辑等。</p><p>有点遗憾不要紧，要紧的是被遗憾击垮！</p><p>如果你在 2021 年遇到了不开心，遇到了挫折，请给自己多一点时间。像二哥，不也一样有做不成功的时候嘛，我们都是平凡人，不卑不亢地接纳自己就会有新的起色。</p><h3 id="三、新的憧憬" tabindex="-1"><a class="header-anchor" href="#三、新的憧憬" aria-hidden="true">#</a> 三、新的憧憬</h3><p>展望 2022 年，有太多的期待了。</p><p>这不，新的惊喜就是《Java 程序员进阶之路》专栏第一次上了 GitHub 的 trending 榜单！</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/csdn-1000wan-8868c50f-d622-4f1f-a92b-13cf95edd786.png" alt=""></p><p>正应了那句话，功夫不负有心人。</p><p>对于这个开源专栏，我投入了大量的心血，一开始的名字叫《教妹学 Java》，主打 Java 的入门级路线，一直连载了近 100篇原创内容。</p><p>后来有朋友建议我，要想走国际化的话，就必须得换个名字，得和国际接轨，于是我就想破脑袋，征求了很多朋友的建议，改成这个《Java 程序员进阶之路》了，因为我之前出版过一本技术书《Web 全栈开发进阶之路》，叫这个名字刚好也非常适合。</p><p>英文名字叫 toBeBetterJavaer， 前后呼应，一气呵成。</p><p>立个 flag 吧，<strong>2022 年，冲 5000 star</strong>！</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/csdn-1000wan-5ebc2c65-f342-45f9-aaf6-7f663b5406b8.png" alt=""></p><p>这个 flag 绝不能倒！</p><p>还有一件事，就是我打算共建一个知识星球，因为每天过来咨询二哥问题的读者实在是太多了，导致回复速度变得很慢，效率不高。</p><p>如果能建一个知识星球，把这些问题的答案全部沉淀下来，隔断时间整理一波 PDF，就美滋滋了。</p><p>目前规划的方向有：</p><ul><li>offer 咨询</li><li>职业规划</li><li>简历优化</li><li>资源分享</li><li>打卡共进</li><li>助学活动</li></ul><p>打算趁过年的这段时间好好的规划一下，列一个详细的清单出来，到时候如果有意愿加入的话，到时候可以来参与一波。</p><p>俗话说，一个好汉三个帮，一个篱笆三个桩，大家在一起学习沉淀的话，效率也会比较高，信息差也会被抹平。</p><p>最后一件事就是，我希望有更多的时间陪陪家人。虽然二哥在三线城市，但业余时间基本上全部用来输入输出了。</p><p>当然了，比起在一线城市打拼的大家伙，二哥陪家人的时间肯定会多一些，但我总觉得不够。毕竟我们无论处于什么阶段，挣多少钱，终归是希望我们家人能过上更好一点的生活。</p><p>否则，我们奋斗拼搏加班卖命的工作，又图什么呢？</p><p>这恐怕也是二哥宁愿在三线城市待着的最大原因了，人活着只有一次，而最亲的人，就是家人，二哥还是一个比较腻在家人身边的人。</p><p>我也希望，大家能在 2022 年找到心爱的人，找到的就更进一步，有家就有烟火味，你奋斗的一切都会显得很值得。</p><h3 id="四、最后的祝福" tabindex="-1"><a class="header-anchor" href="#四、最后的祝福" aria-hidden="true">#</a> 四、最后的祝福</h3><p>如果你是学生党，希望课堂上的你，能够认认真真听讲；如果老师的课实在没意思，网上有很多优质的公开资源，可参考<a href="https://mp.weixin.qq.com/s/Wgedf4ZH3_zJXxFxyPPyNQ" target="_blank" rel="noopener noreferrer">该死！B 站上这些 Java 视频真香！<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><p>还有就是逢考必过，追 TA 必到手。</p><p>如果你是工作党，希望工作中的你，不被甩锅，蒸蒸日上；如果事业上遇到瓶颈了，不妨拓展一门副业，给自己打开一扇窗。</p><p>还有就是绩效必 A，跳槽涨薪美滋滋。</p><p>就这吧！</p><p>如果可以的话，大家可以在评论区刷一波，<strong>二哥牛逼，2022 我们一起飞</strong>~~</p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/about-the-author/csdn-1000wan.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 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href="/about-the-author/#三、为什么做这个开源知识库" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="三、为什么做这个开源知识库"><!---->三、为什么做这个开源知识库<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/about-the-author/#四、未完待续" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="四、未完待续"><!---->四、未完待续<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li></ul></section><!--]--></li></ul></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->个人介绍 Q&amp;A</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author 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33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月18日</span><meta property="datePublished" content="2022-03-18T02:19:22.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 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content="联系作者"></ul></span><!----><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 4 分钟</span><meta property="timeRequired" content="PT4M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/about-the-author/#一、我取得了哪些成绩" class="router-link-active router-link-exact-active toc-link level2">一、我取得了哪些成绩？</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/about-the-author/#_01、公众号" class="router-link-active router-link-exact-active toc-link level3">01、公众号</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/about-the-author/#_02、csdn" class="router-link-active router-link-exact-active toc-link level3">02、CSDN</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/about-the-author/#_03、知乎" class="router-link-active router-link-exact-active toc-link level3">03、知乎</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/about-the-author/#_04、b-站" class="router-link-active router-link-exact-active toc-link level3">04、B 站</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/about-the-author/#_05、github" class="router-link-active router-link-exact-active toc-link level3">05、GitHub</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/about-the-author/#_05、知识星球" class="router-link-active router-link-exact-active toc-link level3">05、知识星球</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/about-the-author/#二、为什么叫沉默王二" class="router-link-active router-link-exact-active toc-link level2">二、为什么叫沉默王二</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/about-the-author/#三、为什么做这个开源知识库" class="router-link-active router-link-exact-active toc-link level2">三、为什么做这个开源知识库</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/about-the-author/#四、未完待续" class="router-link-active router-link-exact-active toc-link level2">四、未完待续</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><p>大家好，我是二哥呀！这篇文章会通过 QA 的形式简单介绍一下我自己。</p><h2 id="一、我取得了哪些成绩" tabindex="-1"><a class="header-anchor" href="#一、我取得了哪些成绩" aria-hidden="true">#</a> 一、我取得了哪些成绩？</h2><p>又到了晒成绩的环节，真让人迫不及待啊（瞧我这该死的自信）！</p><h3 id="_01、公众号" tabindex="-1"><a class="header-anchor" href="#_01、公众号" aria-hidden="true">#</a> 01、公众号</h3><p>目前我的原创公众号“<strong>沉默王二</strong>”有 10.5 万+ 读者关注，专注于分享硬核的 Java 后端技术文章。平均阅读 5500 左右，综合排名能排在全国开发者中的前 50 名左右（数据来源于二十次幂）。</p><p>可以微信搜索 <strong>沉默王二</strong> 关键字或者扫码直接关注，关注后回复 <strong>00</strong> 还可以拉取我为你精心准备的学习资料。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/about-the-author/readme-34972eb2-f214-48db-a43e-c44918dfa23e.png" alt=""></p><p>学习资料有 BAT 大佬的刷题笔记，有《Java 程序员进阶之路》的 PDF 版电子书等等。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/about-the-author/readme-a3b81b80-03ec-470c-a9aa-ae8868e239cd.png" alt=""></p><h3 id="_02、csdn" tabindex="-1"><a class="header-anchor" href="#_02、csdn" aria-hidden="true">#</a> 02、CSDN</h3><p>两届博客之星，总榜前 10 选手，访问量 1100 万+，粉丝 34 万+，妥妥的裆部博主，哦，不，头部博主。</p><blockquote><p>访问地址：https://blog.csdn.net/qing_gee</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/about-the-author/readme-14fd83ec-db6e-4a6f-a8e9-8ce1ce0097c3.png" alt=""></p><h3 id="_03、知乎" tabindex="-1"><a class="header-anchor" href="#_03、知乎" aria-hidden="true">#</a> 03、知乎</h3><p>LV9 选手，阅读总数超 1590 万，今年卷一卷的话，破 2000 万阅读没什么问题。</p><blockquote><p>访问地址：https://www.zhihu.com/people/cmower</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/about-the-author/readme-0fa19b6e-d06c-436b-bd11-1de8265c56bb.png" alt=""></p><h3 id="_04、b-站" tabindex="-1"><a class="header-anchor" href="#_04、b-站" aria-hidden="true">#</a> 04、B 站</h3><p>B 站还比较菜，目前只有一个 10 万+播放量的视频，等我的开源项目编程喵喵🐱开发完第一个版本后，开始重新卷视频。</p><blockquote><p>访问地址：https://space.bilibili.com/513340480</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/about-the-author/readme-5db6c62f-6194-4022-aee5-daf4d1a19f0c.png" alt=""></p><h3 id="_05、github" tabindex="-1"><a class="header-anchor" href="#_05、github" aria-hidden="true">#</a> 05、GitHub</h3><p>目前主要维护的《Java 程序员进阶之路》开源版在 GitHub 上有 1.8k+ 的 star，和出版社约定的是，超过 1 万 star 就出书，小伙伴们可以来点赞支持下。</p><blockquote><p>访问地址：https://github.com/itwanger/toBeBetterJavaer</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/about-the-author/readme-aa477206-41a9-4c55-a649-3d87ba1cb26b.png" alt=""></p><h3 id="_05、知识星球" tabindex="-1"><a class="header-anchor" href="#_05、知识星球" aria-hidden="true">#</a> 05、知识星球</h3><p>目前还处在试运营阶段，正在筹备星球用户专属的 5 份小册，质量高的一笔。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/about-the-author/readme-c3dd1280-098e-460c-9a41-7d566976392b.png" alt=""></p><p>内容涵盖实战项目开发笔记、面试指南、Java学习、LeetCode Java 版刷题笔记等优质内容，价值远超门票！</p><ul><li>编程喵喵开源 Spring Boot+Vue 的前后端分离项目实战笔记</li><li><strong>Java 面试指南</strong>，今年重点更新内容，涵盖面试准备篇、技术面试题篇、面经篇、职场修炼篇等等硬核内容。</li><li>Java 程序员进阶之路优化重构版（星球专属）</li><li>GitHub 上星标 147k+ 的 Java 教程（更多优质教程持续更新）</li><li>LeetCode 题解 Java 版（持续更新 300 道）</li></ul><p>这是《Java 面试指南》专栏目前已经更新的内容，讲真，就这一个专栏就值回票价（新人优惠价只有 69 元）。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/about-the-author/readme-066ef990-a603-4ace-9a19-728eeb319924.png" alt=""></p><p>还有星球内部我也在坚持每天更新优质的内容。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/about-the-author/readme-e108c929-ebc5-4d75-8d40-825f6d027117.png" alt=""></p><p>喜欢的小伙伴可以直接扫码加入。</p><p><img src="http://cdn.tobebetterjavaer.com/itwanger/zhishixingqiu-youhui30yuan.png" alt=""></p><h2 id="二、为什么叫沉默王二" tabindex="-1"><a class="header-anchor" href="#二、为什么叫沉默王二" aria-hidden="true">#</a> 二、为什么叫沉默王二</h2><p>其实原因很简单，我个人比较喜欢王小波，小波是个程序员，还是个作家，写的小说和杂文我都特别喜欢，有一本叫《沉默的大多数》，我就取了沉默二字，《黄金时代》里和陈清扬搞破鞋的男主就叫王二，加上小波在家排行老二，上面有个哥哥，下面有个弟弟，所以综合到一起就叫“沉默王二”了。</p><h2 id="三、为什么做这个开源知识库" tabindex="-1"><a class="header-anchor" href="#三、为什么做这个开源知识库" aria-hidden="true">#</a> 三、为什么做这个开源知识库</h2><blockquote><p>[!NOTE] 知识库取名 <strong>toBeBetterJavaer</strong>，即 <strong>To Be Better Javaer</strong>，意为「成为一名更好的 Java 程序员」，是自学 Java 以来所有原创文章和学习资料的大聚合。内容包括 Java 基础、Java 并发编程、Java 虚拟机、Java 企业级开发、Java 面试等核心知识点。据说每一个优秀的 Java 程序员都喜欢她，风趣幽默、通俗易懂。学 Java，就认准 Java 程序员进阶之路😄。</p><p>知识库旨在为学习 Java 的小伙伴提供一系列：</p><ul><li><strong>优质的原创 Java 教程</strong></li><li><strong>全面清晰的 Java 学习路线</strong></li><li><strong>免费但靠谱的 Java 学习资料</strong></li><li><strong>精选的 Java 岗求职面试指南</strong></li><li><strong>Java 企业级开发所需的必备技术</strong></li></ul><p>赠人玫瑰手有余香。知识库会持续保持<strong>更新</strong>，欢迎收藏品鉴！</p></blockquote><blockquote><p>访问地址：<a href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">https://tobebetterjavaer.com<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><h2 id="四、未完待续" tabindex="-1"><a class="header-anchor" href="#四、未完待续" aria-hidden="true">#</a> 四、未完待续</h2></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a 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class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/about-the-author/#_05、知识星球" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="05、知识星球"><!---->05、知识星球<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/about-the-author/#二、为什么叫沉默王二" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="二、为什么叫沉默王二"><!---->二、为什么叫沉默王二<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/about-the-author/#三、为什么做这个开源知识库" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="三、为什么做这个开源知识库"><!---->三、为什么做这个开源知识库<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/about-the-author/#四、未完待续" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="四、未完待续"><!---->四、未完待续<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li></ul></section><!--]--></li></ul></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->个人介绍 Q&amp;A</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月18日</span><meta property="datePublished" content="2022-03-18T02:19:22.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category8" role>联系作者</li><meta property="articleSection" content="联系作者"></ul></span><!----><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 4 分钟</span><meta property="timeRequired" content="PT4M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/about-the-author/#一、我取得了哪些成绩" class="router-link-active router-link-exact-active toc-link level2">一、我取得了哪些成绩？</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/about-the-author/#_01、公众号" class="router-link-active router-link-exact-active toc-link level3">01、公众号</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/about-the-author/#_02、csdn" class="router-link-active router-link-exact-active toc-link level3">02、CSDN</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/about-the-author/#_03、知乎" class="router-link-active router-link-exact-active toc-link level3">03、知乎</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/about-the-author/#_04、b-站" class="router-link-active router-link-exact-active toc-link level3">04、B 站</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/about-the-author/#_05、github" class="router-link-active router-link-exact-active toc-link level3">05、GitHub</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/about-the-author/#_05、知识星球" class="router-link-active router-link-exact-active toc-link level3">05、知识星球</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/about-the-author/#二、为什么叫沉默王二" class="router-link-active router-link-exact-active toc-link level2">二、为什么叫沉默王二</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/about-the-author/#三、为什么做这个开源知识库" class="router-link-active router-link-exact-active toc-link level2">三、为什么做这个开源知识库</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/about-the-author/#四、未完待续" class="router-link-active router-link-exact-active toc-link level2">四、未完待续</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><p>大家好，我是二哥呀！这篇文章会通过 QA 的形式简单介绍一下我自己。</p><h2 id="一、我取得了哪些成绩" tabindex="-1"><a class="header-anchor" href="#一、我取得了哪些成绩" aria-hidden="true">#</a> 一、我取得了哪些成绩？</h2><p>又到了晒成绩的环节，真让人迫不及待啊（瞧我这该死的自信）！</p><h3 id="_01、公众号" tabindex="-1"><a class="header-anchor" href="#_01、公众号" aria-hidden="true">#</a> 01、公众号</h3><p>目前我的原创公众号“<strong>沉默王二</strong>”有 10.5 万+ 读者关注，专注于分享硬核的 Java 后端技术文章。平均阅读 5500 左右，综合排名能排在全国开发者中的前 50 名左右（数据来源于二十次幂）。</p><p>可以微信搜索 <strong>沉默王二</strong> 关键字或者扫码直接关注，关注后回复 <strong>00</strong> 还可以拉取我为你精心准备的学习资料。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/about-the-author/readme-34972eb2-f214-48db-a43e-c44918dfa23e.png" alt=""></p><p>学习资料有 BAT 大佬的刷题笔记，有《Java 程序员进阶之路》的 PDF 版电子书等等。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/about-the-author/readme-a3b81b80-03ec-470c-a9aa-ae8868e239cd.png" alt=""></p><h3 id="_02、csdn" tabindex="-1"><a class="header-anchor" href="#_02、csdn" aria-hidden="true">#</a> 02、CSDN</h3><p>两届博客之星，总榜前 10 选手，访问量 1100 万+，粉丝 34 万+，妥妥的裆部博主，哦，不，头部博主。</p><blockquote><p>访问地址：https://blog.csdn.net/qing_gee</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/about-the-author/readme-14fd83ec-db6e-4a6f-a8e9-8ce1ce0097c3.png" alt=""></p><h3 id="_03、知乎" tabindex="-1"><a class="header-anchor" href="#_03、知乎" aria-hidden="true">#</a> 03、知乎</h3><p>LV9 选手，阅读总数超 1590 万，今年卷一卷的话，破 2000 万阅读没什么问题。</p><blockquote><p>访问地址：https://www.zhihu.com/people/cmower</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/about-the-author/readme-0fa19b6e-d06c-436b-bd11-1de8265c56bb.png" alt=""></p><h3 id="_04、b-站" tabindex="-1"><a class="header-anchor" href="#_04、b-站" aria-hidden="true">#</a> 04、B 站</h3><p>B 站还比较菜，目前只有一个 10 万+播放量的视频，等我的开源项目编程喵喵🐱开发完第一个版本后，开始重新卷视频。</p><blockquote><p>访问地址：https://space.bilibili.com/513340480</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/about-the-author/readme-5db6c62f-6194-4022-aee5-daf4d1a19f0c.png" alt=""></p><h3 id="_05、github" tabindex="-1"><a class="header-anchor" href="#_05、github" aria-hidden="true">#</a> 05、GitHub</h3><p>目前主要维护的《Java 程序员进阶之路》开源版在 GitHub 上有 1.8k+ 的 star，和出版社约定的是，超过 1 万 star 就出书，小伙伴们可以来点赞支持下。</p><blockquote><p>访问地址：https://github.com/itwanger/toBeBetterJavaer</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/about-the-author/readme-aa477206-41a9-4c55-a649-3d87ba1cb26b.png" alt=""></p><h3 id="_05、知识星球" tabindex="-1"><a class="header-anchor" href="#_05、知识星球" aria-hidden="true">#</a> 05、知识星球</h3><p>目前还处在试运营阶段，正在筹备星球用户专属的 5 份小册，质量高的一笔。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/about-the-author/readme-c3dd1280-098e-460c-9a41-7d566976392b.png" alt=""></p><p>内容涵盖实战项目开发笔记、面试指南、Java学习、LeetCode Java 版刷题笔记等优质内容，价值远超门票！</p><ul><li>编程喵喵开源 Spring Boot+Vue 的前后端分离项目实战笔记</li><li><strong>Java 面试指南</strong>，今年重点更新内容，涵盖面试准备篇、技术面试题篇、面经篇、职场修炼篇等等硬核内容。</li><li>Java 程序员进阶之路优化重构版（星球专属）</li><li>GitHub 上星标 147k+ 的 Java 教程（更多优质教程持续更新）</li><li>LeetCode 题解 Java 版（持续更新 300 道）</li></ul><p>这是《Java 面试指南》专栏目前已经更新的内容，讲真，就这一个专栏就值回票价（新人优惠价只有 69 元）。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/about-the-author/readme-066ef990-a603-4ace-9a19-728eeb319924.png" alt=""></p><p>还有星球内部我也在坚持每天更新优质的内容。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/about-the-author/readme-e108c929-ebc5-4d75-8d40-825f6d027117.png" alt=""></p><p>喜欢的小伙伴可以直接扫码加入。</p><p><img src="http://cdn.tobebetterjavaer.com/itwanger/zhishixingqiu-youhui30yuan.png" alt=""></p><h2 id="二、为什么叫沉默王二" tabindex="-1"><a class="header-anchor" href="#二、为什么叫沉默王二" aria-hidden="true">#</a> 二、为什么叫沉默王二</h2><p>其实原因很简单，我个人比较喜欢王小波，小波是个程序员，还是个作家，写的小说和杂文我都特别喜欢，有一本叫《沉默的大多数》，我就取了沉默二字，《黄金时代》里和陈清扬搞破鞋的男主就叫王二，加上小波在家排行老二，上面有个哥哥，下面有个弟弟，所以综合到一起就叫“沉默王二”了。</p><h2 id="三、为什么做这个开源知识库" tabindex="-1"><a class="header-anchor" href="#三、为什么做这个开源知识库" aria-hidden="true">#</a> 三、为什么做这个开源知识库</h2><blockquote><p>[!NOTE] 知识库取名 <strong>toBeBetterJavaer</strong>，即 <strong>To Be Better Javaer</strong>，意为「成为一名更好的 Java 程序员」，是自学 Java 以来所有原创文章和学习资料的大聚合。内容包括 Java 基础、Java 并发编程、Java 虚拟机、Java 企业级开发、Java 面试等核心知识点。据说每一个优秀的 Java 程序员都喜欢她，风趣幽默、通俗易懂。学 Java，就认准 Java 程序员进阶之路😄。</p><p>知识库旨在为学习 Java 的小伙伴提供一系列：</p><ul><li><strong>优质的原创 Java 教程</strong></li><li><strong>全面清晰的 Java 学习路线</strong></li><li><strong>免费但靠谱的 Java 学习资料</strong></li><li><strong>精选的 Java 岗求职面试指南</strong></li><li><strong>Java 企业级开发所需的必备技术</strong></li></ul><p>赠人玫瑰手有余香。知识库会持续保持<strong>更新</strong>，欢迎收藏品鉴！</p></blockquote><blockquote><p>访问地址：<a href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">https://tobebetterjavaer.com<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path 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disable"></nav><div class="page-title"><h1><!---->我的第一个，一千万！知乎阅读</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月18日</span><meta property="datePublished" content="2022-03-18T02:19:22.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category8" role>联系作者</li><meta property="articleSection" content="联系作者"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>心路历程</li></ul><meta property="keywords" content="心路历程"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 4 分钟</span><meta property="timeRequired" content="PT4M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="我的第一个-一千万-知乎阅读" tabindex="-1"><a class="header-anchor" href="#我的第一个-一千万-知乎阅读" aria-hidden="true">#</a> 我的第一个，一千万！知乎阅读</h1><p>大家好，我是二哥呀！</p><p>前几天，偷偷摸摸过了自己的第 N 个 18 岁，本来不想过生日的，就想当做是平常的一天。结果我妹非要提醒我，大家伙瞧瞧，这像妹妹该说的话吗？</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/zhihu-1000wan-5addb157-141f-400b-a51f-77557c8fdb8d.png" alt=""></p><p>呜呜呜~</p><p>求安慰。</p><p>不想安慰就想偷着乐是吧？那我自己安慰下自己吧。</p><p><strong>经营了近一年的知乎，阅读总数突破了一千万，这也是我人生当中的第一个</strong>。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/zhihu-1000wan-0324afde-4009-4e80-b878-2311ff88e5ca.png" alt=""></p><p>其实早在 11 月就破了千万，当时就想记录一下，但细想一下，好像这点成绩也算不上什么。毕竟逼乎上人均 985、年薪百万、刚下飞机的大佬多的是。</p><p>为什么放在 12 月说呢，大家都懂的，毕竟再过几天 2021 年就要结束了，总得记录点啥。</p><p>况且一千万的阅读量，放在技术圈，确实不算少了。况且我这些分享确实实打实的帮助了不少的小伙伴。</p><p>这不，前几天一个帖子莫名其妙被知乎删除了，我是无感知的。一个小伙伴为了看这个帖子，还特意发起了一次 9.8 元的付费咨询。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/zhihu-1000wan-2fdd5b2b-67c5-40cf-b0e4-0a92a37e659a.png" alt=""></p><p>这足以说明这个帖子的内容是足够硬核的。</p><p>写知乎这近一年时间里，有一个帖子无声无息地爆了：<strong>60 万+的阅读，7000+赞同，2.3 万+次的收藏</strong>。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/zhihu-1000wan-8b4637f2-08c9-479b-855f-3fd332d44651.png" alt=""></p><p>不对啊，收藏竟然是点赞的 3 倍还多。。嗯，此时此刻天空飘出来了四个字：白票真香。</p><p>不过，有一说一，大家好，才是真的好，这么多人点赞收藏，确实是干货无疑了。</p><p>讲真，这个帖子说实在的，属于无心插柳柳成荫了，就是一个即兴作品。</p><p>我只不过是把自己写过的公众号文章做了一个梳理总结。不过我过了一把导演的梦，加上了一点电影拍摄的手法。</p><p>相信大家去看完后也会有一种：卧槽，牛逼啊。</p><p>并且是拍着大腿的那种。</p><p>地址我贴出来了，没看过的小伙伴可以去欣赏一下。</p><blockquote><p>https://www.zhihu.com/question/66535555/answer/1799868707</p></blockquote><p>不知不觉，我已经回洛阳 8 年了！加上在苏州的 3 年半，正儿八经做程序员的时间已经超过 10 年了，时间过得可真快！</p><p>为了体现出我的文学修养，此时必须加上几个成语：真的是光阴似箭、日月如梭、白驹过隙啊。</p><p>按照网上的说法，我这种人要么飞黄腾达财务自由了，要么被无情辞退转行跑滴滴了。</p><p>无奈我既不是前一种，也不是后一种。</p><p>既不卷，也不躺平。</p><p>有焦虑，也有幸福。</p><p>对未来，有期待，也有担忧。</p><p>对当下，有满足，也有不满。</p><p>。。。。。。</p><p>完蛋，一不小心上升到哲学的层面上了，收收收收。</p><p>这么说吧，我一直觉得自己比较幸运。</p><p>大学原本选的不是计算机专业，却一不小心做了程序员，没想到，这个职业还挺适合自己。</p><p>大学过得一塌糊涂，却不经意间去了一家外企，做到了 work-life-balance。</p><p>身处三线城市，按理说这里是一片互联网的荒漠，我却在这里开荒拓土出了一片绿洲。</p><p>再加上公众号的恰饭，确实让我的生活变得不再那么窘迫了。不管是输入还是输出，也都有了更强的动力。</p><p>毕竟只靠爱来发电，很难坚持。</p><p>如果你觉得有些饭不错，感兴趣，不妨试试，给自己的投资永远都是值得的，并且回报率极高。</p><p>反正我自己私底下是买了不少课，毕竟学习是永远不能落下的，不管你是在一线城市，还是二三线城市。</p><p>给大家看一下，这只是我书柜的一角。</p><p>纸质书虽然已经不流行了，但它会让你感觉踏实，日子过得有奔头。</p><p>对恰的饭不感兴趣的，忽略就好，多看看干货给个三连也是非常不错的体验。</p><p>我在知乎上还有不少硬核输出，尤其是这些千赞以上的帖子，真心推荐给大家看看，看完后绝壁是有收获的。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/zhihu-1000wan-4612a83f-6207-496c-b32b-c6f1ab031c4f.png" alt=""></p><p>虽然有些埋没的帖子我觉得价值也很高。不过，埋没就埋没吧。</p><p>定个小目标吧：2022 年，知乎阅读破 5000 万阅读（好像注定完不成）。</p><p>这个 flag 我立这了哈，欢迎大家监督。。</p><p>要是完不成，我把知乎上的全部收入拿出来给大家分成，怎么样？</p><p>明年底我会在这里公布结果，大家敬请期待。</p><p>好了，就聊这么多吧，继续加班回答帖子去了。</p><p>我是二哥，我们下期见~</p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/about-the-author/zhihu-1000wan.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" 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class="theme-hope-content"><h1 id="我的第一个-一千万-知乎阅读" tabindex="-1"><a class="header-anchor" href="#我的第一个-一千万-知乎阅读" aria-hidden="true">#</a> 我的第一个，一千万！知乎阅读</h1><p>大家好，我是二哥呀！</p><p>前几天，偷偷摸摸过了自己的第 N 个 18 岁，本来不想过生日的，就想当做是平常的一天。结果我妹非要提醒我，大家伙瞧瞧，这像妹妹该说的话吗？</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/zhihu-1000wan-5addb157-141f-400b-a51f-77557c8fdb8d.png" alt=""></p><p>呜呜呜~</p><p>求安慰。</p><p>不想安慰就想偷着乐是吧？那我自己安慰下自己吧。</p><p><strong>经营了近一年的知乎，阅读总数突破了一千万，这也是我人生当中的第一个</strong>。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/zhihu-1000wan-0324afde-4009-4e80-b878-2311ff88e5ca.png" alt=""></p><p>其实早在 11 月就破了千万，当时就想记录一下，但细想一下，好像这点成绩也算不上什么。毕竟逼乎上人均 985、年薪百万、刚下飞机的大佬多的是。</p><p>为什么放在 12 月说呢，大家都懂的，毕竟再过几天 2021 年就要结束了，总得记录点啥。</p><p>况且一千万的阅读量，放在技术圈，确实不算少了。况且我这些分享确实实打实的帮助了不少的小伙伴。</p><p>这不，前几天一个帖子莫名其妙被知乎删除了，我是无感知的。一个小伙伴为了看这个帖子，还特意发起了一次 9.8 元的付费咨询。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/zhihu-1000wan-2fdd5b2b-67c5-40cf-b0e4-0a92a37e659a.png" alt=""></p><p>这足以说明这个帖子的内容是足够硬核的。</p><p>写知乎这近一年时间里，有一个帖子无声无息地爆了：<strong>60 万+的阅读，7000+赞同，2.3 万+次的收藏</strong>。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/zhihu-1000wan-8b4637f2-08c9-479b-855f-3fd332d44651.png" alt=""></p><p>不对啊，收藏竟然是点赞的 3 倍还多。。嗯，此时此刻天空飘出来了四个字：白票真香。</p><p>不过，有一说一，大家好，才是真的好，这么多人点赞收藏，确实是干货无疑了。</p><p>讲真，这个帖子说实在的，属于无心插柳柳成荫了，就是一个即兴作品。</p><p>我只不过是把自己写过的公众号文章做了一个梳理总结。不过我过了一把导演的梦，加上了一点电影拍摄的手法。</p><p>相信大家去看完后也会有一种：卧槽，牛逼啊。</p><p>并且是拍着大腿的那种。</p><p>地址我贴出来了，没看过的小伙伴可以去欣赏一下。</p><blockquote><p>https://www.zhihu.com/question/66535555/answer/1799868707</p></blockquote><p>不知不觉，我已经回洛阳 8 年了！加上在苏州的 3 年半，正儿八经做程序员的时间已经超过 10 年了，时间过得可真快！</p><p>为了体现出我的文学修养，此时必须加上几个成语：真的是光阴似箭、日月如梭、白驹过隙啊。</p><p>按照网上的说法，我这种人要么飞黄腾达财务自由了，要么被无情辞退转行跑滴滴了。</p><p>无奈我既不是前一种，也不是后一种。</p><p>既不卷，也不躺平。</p><p>有焦虑，也有幸福。</p><p>对未来，有期待，也有担忧。</p><p>对当下，有满足，也有不满。</p><p>。。。。。。</p><p>完蛋，一不小心上升到哲学的层面上了，收收收收。</p><p>这么说吧，我一直觉得自己比较幸运。</p><p>大学原本选的不是计算机专业，却一不小心做了程序员，没想到，这个职业还挺适合自己。</p><p>大学过得一塌糊涂，却不经意间去了一家外企，做到了 work-life-balance。</p><p>身处三线城市，按理说这里是一片互联网的荒漠，我却在这里开荒拓土出了一片绿洲。</p><p>再加上公众号的恰饭，确实让我的生活变得不再那么窘迫了。不管是输入还是输出，也都有了更强的动力。</p><p>毕竟只靠爱来发电，很难坚持。</p><p>如果你觉得有些饭不错，感兴趣，不妨试试，给自己的投资永远都是值得的，并且回报率极高。</p><p>反正我自己私底下是买了不少课，毕竟学习是永远不能落下的，不管你是在一线城市，还是二三线城市。</p><p>给大家看一下，这只是我书柜的一角。</p><p>纸质书虽然已经不流行了，但它会让你感觉踏实，日子过得有奔头。</p><p>对恰的饭不感兴趣的，忽略就好，多看看干货给个三连也是非常不错的体验。</p><p>我在知乎上还有不少硬核输出，尤其是这些千赞以上的帖子，真心推荐给大家看看，看完后绝壁是有收获的。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/zhihu-1000wan-4612a83f-6207-496c-b32b-c6f1ab031c4f.png" alt=""></p><p>虽然有些埋没的帖子我觉得价值也很高。不过，埋没就埋没吧。</p><p>定个小目标吧：2022 年，知乎阅读破 5000 万阅读（好像注定完不成）。</p><p>这个 flag 我立这了哈，欢迎大家监督。。</p><p>要是完不成，我把知乎上的全部收入拿出来给大家分成，怎么样？</p><p>明年底我会在这里公布结果，大家敬请期待。</p><p>好了，就聊这么多吧，继续加班回答帖子去了。</p><p>我是二哥，我们下期见~</p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/about-the-author/zhihu-1000wan.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 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clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->深入理解Java数组</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" 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class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->深入理解Java数组</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 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4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 7 分钟</span><meta property="timeRequired" content="PT7M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="深入理解java数组" tabindex="-1"><a class="header-anchor" href="#深入理解java数组" aria-hidden="true">#</a> 深入理解Java数组</h1><p>“哥，我看你之前的文章里提到，ArrayList 的内部是用数组实现的，我就对数组非常感兴趣，想深入地了解一下，今天终于到这个环节了，好期待呀！”三妹的语气里显得很兴奋。</p><p>“的确是的，看 ArrayList 的源码就一清二楚了。”我一边说，一边打开 Intellij IDEA，并找到了 ArrayList 的源码。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token doc-comment comment">/**
  * The array buffer into which the elements of the ArrayList are stored.
  * The capacity of the ArrayList is the length of this array buffer. Any
  * empty ArrayList with elementData == DEFAULTCAPACITY_EMPTY_ELEMENTDATA
@@ -113,6 +113,6 @@ demo<span class="token punctuation">.</span><span class="token function">varargs
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>上例中从数组中查询元素 4，找到后通过 break 关键字退出循环。</p><p>如果数组提前进行了排序，就可以使用二分查找法，这样效率就会更高一些。<code>Arrays.binarySearch()</code> 方法可供我们使用，它需要传递一个数组，和要查找的元素。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">int</span><span class="token punctuation">[</span><span class="token punctuation">]</span> anArray <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token keyword">int</span><span class="token punctuation">[</span><span class="token punctuation">]</span> <span class="token punctuation">{</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">}</span><span class="token punctuation">;</span>
 <span class="token keyword">int</span> index <span class="token operator">=</span> <span class="token class-name">Arrays</span><span class="token punctuation">.</span><span class="token function">binarySearch</span><span class="token punctuation">(</span>anArray<span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><p>“除了一维数组，还有二维数组，三妹你可以去研究下，比如说用二维数组打印一下杨辉三角。”说完，我就去阳台上休息了，留三妹在那里学习，不能打扰她。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/array/array.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/3/29 上午9:56:53</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/string/split.html" class="nav-link prev" aria-label="字符串分割"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->字符串分割</div></a><a href="/array/print.html" class="nav-link next" aria-label="打印数组"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">打印数组<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 4 分钟</span><meta property="timeRequired" content="PT4M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="如何优雅地打印java数组" tabindex="-1"><a class="header-anchor" href="#如何优雅地打印java数组" aria-hidden="true">#</a> 如何优雅地打印Java数组？</h1><p>“哥，之前听你说，数组也是一个对象，但 Java 中并未明确的定义这样一个类。”看来三妹有在用心地学习。</p><p>“是的，因此数组也就没有机会覆盖 <code>Object.toString()</code> 方法。如果尝试直接打印数组的话，输出的结果并不是我们预期的结果。”我接着三妹的话继续说。</p><p>“那怎么打印数组呢？”三妹心有灵犀地把今天的核心问题提了出来。</p><p>“首先，我们来看一下，为什么不能直接打印数组，直接打印的话，会出现什么问题。”</p><p>来看这样一个例子。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>String [] cmowers = {&quot;沉默&quot;,&quot;王二&quot;,&quot;一枚有趣的程序员&quot;};
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class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->如何优雅地打印Java数组？</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2021年6月5日</span><meta property="datePublished" content="2021-06-05T03:10:48.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><meta property="articleSection" content="Java核心"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" 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7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 4 分钟</span><meta property="timeRequired" content="PT4M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="如何优雅地打印java数组" tabindex="-1"><a class="header-anchor" href="#如何优雅地打印java数组" aria-hidden="true">#</a> 如何优雅地打印Java数组？</h1><p>“哥，之前听你说，数组也是一个对象，但 Java 中并未明确的定义这样一个类。”看来三妹有在用心地学习。</p><p>“是的，因此数组也就没有机会覆盖 <code>Object.toString()</code> 方法。如果尝试直接打印数组的话，输出的结果并不是我们预期的结果。”我接着三妹的话继续说。</p><p>“那怎么打印数组呢？”三妹心有灵犀地把今天的核心问题提了出来。</p><p>“首先，我们来看一下，为什么不能直接打印数组，直接打印的话，会出现什么问题。”</p><p>来看这样一个例子。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>String [] cmowers = {&quot;沉默&quot;,&quot;王二&quot;,&quot;一枚有趣的程序员&quot;};
 System.out.println(cmowers);
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><p>程序打印的结果是：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>[Ljava.lang.String;@3d075dc0
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p><code>[Ljava.lang.String;</code> 表示字符串数组的 Class 名，@ 后面的是十六进制的 hashCode——这样的打印结果太“人性化”了，一般人表示看不懂！为什么会这样显示呢？查看一下 <code>java.lang.Object</code> 类的 <code>toString()</code> 方法就明白了。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token class-name">String</span> <span class="token function">toString</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
@@ -73,6 +73,6 @@ System.out.println(cmowers);
 <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token class-name">Arrays</span><span class="token punctuation">.</span><span class="token function">deepToString</span><span class="token punctuation">(</span>deepArray<span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><p>打印结果如下所示。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>[[沉默, 王二], [一枚有趣的程序员]]
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><hr><p>“说到打印，三妹，哥给你提醒一点。阿里巴巴的 Java 开发手册上有这样一条规约，你看。”</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/array/print-03.png" alt=""></p><p>“什么是 POJO 呢，就是 Plain Ordinary Java Object 的缩写，一般在 Web 应用程序中建立一个数据库的映射对象时，我们称它为 POJO，这类对象不继承或不实现任何其它 Java 框架的类或接口。”</p><p>“对于这样的类，最好是重写一下它的 <code>toString()</code> 方法，方便查看这个对象到底包含了什么字段，好排查问题。”</p><p>“如果不重写的话，打印出来的 Java 对象就像直接打印数组的那样，一串谁也看不懂的字符序列。”</p><p>“可以借助 Intellij IDEA 生成重写的 <code>toString()</code> 方法，特别方便。”</p><p>“好的，哥，我记住了。以后遇到的话，我注意下。你去休息吧，我来敲一下你提到的这些代码，练一练。”</p><p>“OK，我走，我走。”</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/array/print.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/14 上午7:14:28</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/array/array.html" class="nav-link prev" aria-label="数组"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->数组</div></a><!----></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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\u6D88\u606F\u961F\u5217\u8FDB\u884C\u901A\u4FE1\u3002\u5728\u4E0B\u5355\u65F6\uFF0C\u4EA4\u6613\u670D\u52A1\u53D1\u9001\u201C\u6263\u51CF\u8D26\u6237 X 100 \u4E2A\u4EAC\u8C46\u201D\u7684\u6D88\u606F\u7ED9 MQ \u6D88\u606F\u961F\u5217\uFF0C\u800C\u4EAC\u8C46\u670D\u52A1\u5219\u5728\u6D88\u8D39\u7AEF\u6D88\u8D39\u8FD9\u6761\u547D\u4EE4\uFF0C\u5B9E\u73B0\u771F\u6B63\u7684\u6263\u51CF\u64CD\u4F5C\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mq/100-budiushi-a5cbe077-5f38-44c6-9ed7-496fe1702cca.png" alt=""></p><p>\u90A3\u5728\u8FD9\u4E2A\u8FC7\u7A0B\u4E2D\u4F60\u4F1A\u9047\u5230\u4EC0\u4E48\u95EE\u9898\u5462\uFF1F</p><h3 id="\u6848\u4F8B\u5206\u6790" tabindex="-1"><a class="header-anchor" href="#\u6848\u4F8B\u5206\u6790" aria-hidden="true">#</a> \u6848\u4F8B\u5206\u6790</h3><p>\u8981\u77E5\u9053\uFF0C\u5728\u4E92\u8054\u7F51\u9762\u8BD5\u4E2D\uFF0C\u5F15\u5165 MQ \u6D88\u606F\u4E2D\u95F4\u4EF6\u6700\u76F4\u63A5\u7684\u76EE\u7684\u662F\uFF1A\u505A\u7CFB\u7EDF\u89E3\u8026\u5408\u6D41\u91CF\u63A7\u5236\uFF0C\u8FFD\u5176\u6839\u6E90\u8FD8\u662F\u4E3A\u4E86\u89E3\u51B3\u4E92\u8054\u7F51\u7CFB\u7EDF\u7684\u9AD8\u53EF\u7528\u548C\u9AD8\u6027\u80FD\u95EE\u9898\u3002</p><ul><li>\u7CFB\u7EDF\u89E3\u8026\uFF1A \u7528 MQ \u6D88\u606F\u961F\u5217\uFF0C\u53EF\u4EE5\u9694\u79BB\u7CFB\u7EDF\u4E0A\u4E0B\u6E38\u73AF\u5883\u53D8\u5316\u5E26\u6765\u7684\u4E0D\u7A33\u5B9A\u56E0\u7D20\uFF0C\u6BD4\u5982\u4EAC\u8C46\u670D\u52A1\u7684\u7CFB\u7EDF\u9700\u6C42\u65E0\u8BBA\u5982\u4F55\u53D8\u5316\uFF0C\u4EA4\u6613\u670D\u52A1\u4E0D\u7528\u505A\u4EFB\u4F55\u6539\u53D8\uFF0C\u5373\u4F7F\u5F53\u4EAC\u8C46\u670D\u52A1\u51FA\u73B0\u6545\u969C\uFF0C\u4E3B\u4EA4\u6613\u6D41\u7A0B\u4E5F\u53EF\u4EE5\u5C06\u4EAC\u8C46\u670D\u52A1\u964D\u7EA7\uFF0C\u5B9E\u73B0\u4EA4\u6613\u670D\u52A1\u548C\u4EAC\u8C46\u670D\u52A1\u7684\u89E3\u8026\uFF0C\u505A\u5230\u4E86\u7CFB\u7EDF\u7684\u9AD8\u53EF\u7528\u3002</li><li>\u6D41\u91CF\u63A7\u5236\uFF1A \u9047\u5230\u79D2\u6740\u7B49\u6D41\u91CF\u7A81\u589E\u7684\u573A\u666F\uFF0C\u901A\u8FC7 MQ \u8FD8\u53EF\u4EE5\u5B9E\u73B0\u6D41\u91CF\u7684\u201C\u524A\u5CF0\u586B\u8C37\u201D\u7684\u4F5C\u7528\uFF0C\u53EF\u4EE5\u6839\u636E\u4E0B\u6E38\u7684\u5904\u7406\u80FD\u529B\u81EA\u52A8\u8C03\u8282\u6D41\u91CF\u3002 \u4E0D\u8FC7\u5F15\u5165 MQ \u867D\u7136\u5B9E\u73B0\u4E86\u7CFB\u7EDF\u89E3\u8026\u5408\u6D41\u91CF\u63A7\u5236\uFF0C\u4E5F\u4F1A\u5E26\u6765\u5176\u4ED6\u95EE\u9898\u3002</li></ul><p><strong>\u5F15\u5165 MQ \u6D88\u606F\u4E2D\u95F4\u4EF6\u5B9E\u73B0\u7CFB\u7EDF\u89E3\u8026\uFF0C\u4F1A\u5F71\u54CD\u7CFB\u7EDF\u4E4B\u95F4\u6570\u636E\u4F20\u8F93\u7684\u4E00\u81F4\u6027</strong>\u3002 \u5728\u5206\u5E03\u5F0F\u7CFB\u7EDF\u4E2D\uFF0C\u5982\u679C\u4E24\u4E2A\u8282\u70B9\u4E4B\u95F4\u5B58\u5728\u6570\u636E\u540C\u6B65\uFF0C\u5C31\u4F1A\u5E26\u6765\u6570\u636E\u4E00\u81F4\u6027\u7684\u95EE\u9898\u3002\u540C\u7406\uFF0C\u5728\u8FD9\u4E00\u8BB2\u4F60\u8981\u89E3\u51B3\u7684\u5C31\u662F\uFF1A\u6D88\u606F\u751F\u4EA7\u7AEF\u548C\u6D88\u606F\u6D88\u8D39\u7AEF\u7684\u6D88\u606F\u6570\u636E\u4E00\u81F4\u6027\u95EE\u9898\uFF08\u4E5F\u5C31\u662F\u5982\u4F55\u786E\u4FDD\u6D88\u606F\u4E0D\u4E22\u5931\uFF09\u3002</p><p>\u800C\u5F15\u5165 MQ \u6D88\u606F\u4E2D\u95F4\u4EF6\u89E3\u51B3\u6D41\u91CF\u63A7\u5236\uFF0C \u4F1A\u4F7F\u6D88\u8D39\u7AEF\u5904\u7406\u80FD\u529B\u4E0D\u8DB3\u4ECE\u800C\u5BFC\u81F4\u6D88\u606F\u79EF\u538B\uFF0C\u8FD9\u4E5F\u662F\u4F60\u8981\u89E3\u51B3\u7684\u95EE\u9898\u3002</p><p>\u6240\u4EE5\u4F60\u80FD\u53D1\u73B0\uFF0C\u95EE\u9898\u4E0E\u95EE\u9898\u4E4B\u95F4\u5F80\u5F80\u662F\u73AF\u73AF\u76F8\u6263\u7684\uFF0C\u9762\u8BD5\u5B98\u4F1A\u501F\u673A\u8003\u5BDF\u4F60\u89E3\u51B3\u95EE\u9898\u601D\u8DEF\u7684\u8FDE\u8D2F\u6027\u548C\u77E5\u8BC6\u4F53\u7CFB\u7684\u638C\u63E1\u7A0B\u5EA6\u3002</p><p>\u90A3\u9762\u5BF9\u201C\u5728\u4F7F\u7528 MQ \u6D88\u606F\u961F\u5217\u65F6\uFF0C\u5982\u4F55\u786E\u4FDD\u6D88\u606F\u4E0D\u4E22\u5931\u201D\u8FD9\u4E2A\u95EE\u9898\u65F6\uFF0C\u4F60\u8981\u600E\u4E48\u56DE\u7B54\u5462\uFF1F\u9996\u5148\uFF0C\u4F60\u8981\u5206\u6790\u5176\u4E2D\u6709\u51E0\u4E2A\u8003\u70B9\uFF0C\u6BD4\u5982\uFF1A</p><ul><li>\u5982\u4F55\u77E5\u9053\u6709\u6D88\u606F\u4E22\u5931\uFF1F</li><li>\u54EA\u4E9B\u73AF\u8282\u53EF\u80FD\u4E22\u6D88\u606F\uFF1F</li><li>\u5982\u4F55\u786E\u4FDD\u6D88\u606F\u4E0D\u4E22\u5931\uFF1F</li></ul><p><strong>\u5019\u9009\u4EBA\u5728\u56DE\u7B54\u65F6\uFF0C\u8981\u5148\u8BA9\u9762\u8BD5\u5B98\u77E5\u9053\u4F60\u7684\u5206\u6790\u601D\u8DEF\uFF0C\u7136\u540E\u518D\u63D0\u4F9B\u89E3\u51B3\u65B9\u6848</strong>\uFF1A\u7F51\u7EDC\u4E2D\u7684\u6570\u636E\u4F20\u8F93\u4E0D\u53EF\u9760\uFF0C\u60F3\u8981\u89E3\u51B3\u5982\u4F55\u4E0D\u4E22\u6D88\u606F\u7684\u95EE\u9898\uFF0C\u9996\u5148\u8981\u77E5\u9053\u54EA\u4E9B\u73AF\u8282\u53EF\u80FD\u4E22\u6D88\u606F\uFF0C\u4EE5\u53CA\u6211\u4EEC\u5982\u4F55\u77E5\u9053\u6D88\u606F\u662F\u5426\u4E22\u5931\u4E86\uFF0C\u6700\u540E\u624D\u662F\u89E3\u51B3\u65B9\u6848\uFF08\u800C\u4E0D\u662F\u4E0A\u6765\u5C31\u76F4\u63A5\u8BF4\u81EA\u5DF1\u7684\u89E3\u51B3\u65B9\u6848\uFF09\u3002\u5C31\u597D\u6BD4\u201C\u67B6\u6784\u8BBE\u8BA1\u201D\u201C\u67B6\u6784\u201D\u4F53\u73B0\u4E86\u67B6\u6784\u5E08\u7684\u601D\u8003\u8FC7\u7A0B\uFF0C\u800C\u201C\u8BBE\u8BA1\u201D\u624D\u662F\u6700\u540E\u7684\u89E3\u51B3\u65B9\u6848\uFF0C\u4E24\u8005\u7F3A\u4E00\u4E0D\u53EF\u3002</p><h3 id="\u6848\u4F8B\u89E3\u7B54" tabindex="-1"><a class="header-anchor" href="#\u6848\u4F8B\u89E3\u7B54" aria-hidden="true">#</a> \u6848\u4F8B\u89E3\u7B54</h3><p>\u6211\u4EEC\u9996\u5148\u6765\u770B\u6D88\u606F\u4E22\u5931\u7684\u73AF\u8282\uFF0C\u4E00\u6761\u6D88\u606F\u4ECE\u751F\u4EA7\u5230\u6D88\u8D39\u5B8C\u6210\u8FD9\u4E2A\u8FC7\u7A0B\uFF0C\u53EF\u4EE5\u5212\u5206\u4E09\u4E2A\u9636\u6BB5\uFF0C\u5206\u522B\u4E3A\u6D88\u606F\u751F\u4EA7\u9636\u6BB5\uFF0C\u6D88\u606F\u5B58\u50A8\u9636\u6BB5\u548C\u6D88\u606F\u6D88\u8D39\u9636\u6BB5\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mq/100-budiushi-1d1962fb-cb0f-41d0-8d6d-077ba33b6125.png" alt=""></p><p><strong>\u6D88\u606F\u751F\u4EA7\u9636\u6BB5</strong>\uFF1A \u4ECE\u6D88\u606F\u88AB\u751F\u4EA7\u51FA\u6765\uFF0C\u7136\u540E\u63D0\u4EA4\u7ED9 MQ \u7684\u8FC7\u7A0B\u4E2D\uFF0C\u53EA\u8981\u80FD\u6B63\u5E38\u6536\u5230 MQ Broker \u7684 ack \u786E\u8BA4\u54CD\u5E94\uFF0C\u5C31\u8868\u793A\u53D1\u9001\u6210\u529F\uFF0C\u6240\u4EE5\u53EA\u8981\u5904\u7406\u597D\u8FD4\u56DE\u503C\u548C\u5F02\u5E38\uFF0C\u8FD9\u4E2A\u9636\u6BB5\u662F\u4E0D\u4F1A\u51FA\u73B0\u6D88\u606F\u4E22\u5931\u7684\u3002</p><p><strong>\u6D88\u606F\u5B58\u50A8\u9636\u6BB5</strong>\uFF1A \u8FD9\u4E2A\u9636\u6BB5\u4E00\u822C\u4F1A\u76F4\u63A5\u4EA4\u7ED9 MQ \u6D88\u606F\u4E2D\u95F4\u4EF6\u6765\u4FDD\u8BC1\uFF0C\u4F46\u662F\u4F60\u8981\u4E86\u89E3\u5B83\u7684\u539F\u7406\uFF0C\u6BD4\u5982 Broker \u4F1A\u505A\u526F\u672C\uFF0C\u4FDD\u8BC1\u4E00\u6761\u6D88\u606F\u81F3\u5C11\u540C\u6B65\u4E24\u4E2A\u8282\u70B9\u518D\u8FD4\u56DE ack\u3002</p><p><strong>\u6D88\u606F\u6D88\u8D39\u9636\u6BB5</strong>\uFF1A \u6D88\u8D39\u7AEF\u4ECE Broker \u4E0A\u62C9\u53D6\u6D88\u606F\uFF0C\u53EA\u8981\u6D88\u8D39\u7AEF\u5728\u6536\u5230\u6D88\u606F\u540E\uFF0C\u4E0D\u7ACB\u5373\u53D1\u9001\u6D88\u8D39\u786E\u8BA4\u7ED9 Broker\uFF0C\u800C\u662F\u7B49\u5230\u6267\u884C\u5B8C\u4E1A\u52A1\u903B\u8F91\u540E\uFF0C\u518D\u53D1\u9001\u6D88\u8D39\u786E\u8BA4\uFF0C\u4E5F\u80FD\u4FDD\u8BC1\u6D88\u606F\u7684\u4E0D\u4E22\u5931\u3002</p><p>\u65B9\u6848\u770B\u4F3C\u4E07\u65E0\u4E00\u5931\uFF0C\u6BCF\u4E2A\u9636\u6BB5\u90FD\u80FD\u4FDD\u8BC1\u6D88\u606F\u7684\u4E0D\u4E22\u5931\uFF0C\u4F46\u5728\u5206\u5E03\u5F0F\u7CFB\u7EDF\u4E2D\uFF0C\u6545\u969C\u4E0D\u53EF\u907F\u514D\uFF0C\u4F5C\u4E3A\u6D88\u606F\u751F\u4EA7\u7AEF\uFF0C\u4F60\u5E76\u4E0D\u80FD\u4FDD\u8BC1 MQ \u662F\u4E0D\u662F\u5F04\u4E22\u4E86\u4F60\u7684\u6D88\u606F\uFF0C\u6D88\u8D39\u8005\u662F\u5426\u6D88\u8D39\u4E86\u4F60\u7684\u6D88\u606F\uFF0C\u6240\u4EE5\uFF0C\u672C\u7740 <code>Design for Failure</code> \u7684\u8BBE\u8BA1\u539F\u5219\uFF0C\u4F60\u8FD8\u662F\u9700\u8981\u4E00\u79CD\u673A\u5236\uFF0C\u6765 Check 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\u751F\u6210\uFF0C\u4E5F\u53EF\u4EE5\u901A\u8FC7\u5206\u5E03\u5F0F\u5168\u5C40\u552F\u4E00 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&gt;</li></ul><hr><blockquote><p>\u539F\u6587\u94FE\u63A5\uFF1Ahttp://t.hk.uy/Ue6</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p>',54),o=[i];function n(s,c){return p(),t("div",null,o)}var h=e(r,[["render",n],["__file","100-budiushi.html.vue"]]);export{h as default};
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\u6D88\u606F\u961F\u5217\u8FDB\u884C\u901A\u4FE1\u3002\u5728\u4E0B\u5355\u65F6\uFF0C\u4EA4\u6613\u670D\u52A1\u53D1\u9001\u201C\u6263\u51CF\u8D26\u6237 X 100 \u4E2A\u4EAC\u8C46\u201D\u7684\u6D88\u606F\u7ED9 MQ \u6D88\u606F\u961F\u5217\uFF0C\u800C\u4EAC\u8C46\u670D\u52A1\u5219\u5728\u6D88\u8D39\u7AEF\u6D88\u8D39\u8FD9\u6761\u547D\u4EE4\uFF0C\u5B9E\u73B0\u771F\u6B63\u7684\u6263\u51CF\u64CD\u4F5C\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mq/100-budiushi-a5cbe077-5f38-44c6-9ed7-496fe1702cca.png" alt=""></p><p>\u90A3\u5728\u8FD9\u4E2A\u8FC7\u7A0B\u4E2D\u4F60\u4F1A\u9047\u5230\u4EC0\u4E48\u95EE\u9898\u5462\uFF1F</p><h3 id="\u6848\u4F8B\u5206\u6790" tabindex="-1"><a class="header-anchor" href="#\u6848\u4F8B\u5206\u6790" aria-hidden="true">#</a> \u6848\u4F8B\u5206\u6790</h3><p>\u8981\u77E5\u9053\uFF0C\u5728\u4E92\u8054\u7F51\u9762\u8BD5\u4E2D\uFF0C\u5F15\u5165 MQ \u6D88\u606F\u4E2D\u95F4\u4EF6\u6700\u76F4\u63A5\u7684\u76EE\u7684\u662F\uFF1A\u505A\u7CFB\u7EDF\u89E3\u8026\u5408\u6D41\u91CF\u63A7\u5236\uFF0C\u8FFD\u5176\u6839\u6E90\u8FD8\u662F\u4E3A\u4E86\u89E3\u51B3\u4E92\u8054\u7F51\u7CFB\u7EDF\u7684\u9AD8\u53EF\u7528\u548C\u9AD8\u6027\u80FD\u95EE\u9898\u3002</p><ul><li>\u7CFB\u7EDF\u89E3\u8026\uFF1A \u7528 MQ \u6D88\u606F\u961F\u5217\uFF0C\u53EF\u4EE5\u9694\u79BB\u7CFB\u7EDF\u4E0A\u4E0B\u6E38\u73AF\u5883\u53D8\u5316\u5E26\u6765\u7684\u4E0D\u7A33\u5B9A\u56E0\u7D20\uFF0C\u6BD4\u5982\u4EAC\u8C46\u670D\u52A1\u7684\u7CFB\u7EDF\u9700\u6C42\u65E0\u8BBA\u5982\u4F55\u53D8\u5316\uFF0C\u4EA4\u6613\u670D\u52A1\u4E0D\u7528\u505A\u4EFB\u4F55\u6539\u53D8\uFF0C\u5373\u4F7F\u5F53\u4EAC\u8C46\u670D\u52A1\u51FA\u73B0\u6545\u969C\uFF0C\u4E3B\u4EA4\u6613\u6D41\u7A0B\u4E5F\u53EF\u4EE5\u5C06\u4EAC\u8C46\u670D\u52A1\u964D\u7EA7\uFF0C\u5B9E\u73B0\u4EA4\u6613\u670D\u52A1\u548C\u4EAC\u8C46\u670D\u52A1\u7684\u89E3\u8026\uFF0C\u505A\u5230\u4E86\u7CFB\u7EDF\u7684\u9AD8\u53EF\u7528\u3002</li><li>\u6D41\u91CF\u63A7\u5236\uFF1A \u9047\u5230\u79D2\u6740\u7B49\u6D41\u91CF\u7A81\u589E\u7684\u573A\u666F\uFF0C\u901A\u8FC7 MQ \u8FD8\u53EF\u4EE5\u5B9E\u73B0\u6D41\u91CF\u7684\u201C\u524A\u5CF0\u586B\u8C37\u201D\u7684\u4F5C\u7528\uFF0C\u53EF\u4EE5\u6839\u636E\u4E0B\u6E38\u7684\u5904\u7406\u80FD\u529B\u81EA\u52A8\u8C03\u8282\u6D41\u91CF\u3002 \u4E0D\u8FC7\u5F15\u5165 MQ \u867D\u7136\u5B9E\u73B0\u4E86\u7CFB\u7EDF\u89E3\u8026\u5408\u6D41\u91CF\u63A7\u5236\uFF0C\u4E5F\u4F1A\u5E26\u6765\u5176\u4ED6\u95EE\u9898\u3002</li></ul><p><strong>\u5F15\u5165 MQ \u6D88\u606F\u4E2D\u95F4\u4EF6\u5B9E\u73B0\u7CFB\u7EDF\u89E3\u8026\uFF0C\u4F1A\u5F71\u54CD\u7CFB\u7EDF\u4E4B\u95F4\u6570\u636E\u4F20\u8F93\u7684\u4E00\u81F4\u6027</strong>\u3002 \u5728\u5206\u5E03\u5F0F\u7CFB\u7EDF\u4E2D\uFF0C\u5982\u679C\u4E24\u4E2A\u8282\u70B9\u4E4B\u95F4\u5B58\u5728\u6570\u636E\u540C\u6B65\uFF0C\u5C31\u4F1A\u5E26\u6765\u6570\u636E\u4E00\u81F4\u6027\u7684\u95EE\u9898\u3002\u540C\u7406\uFF0C\u5728\u8FD9\u4E00\u8BB2\u4F60\u8981\u89E3\u51B3\u7684\u5C31\u662F\uFF1A\u6D88\u606F\u751F\u4EA7\u7AEF\u548C\u6D88\u606F\u6D88\u8D39\u7AEF\u7684\u6D88\u606F\u6570\u636E\u4E00\u81F4\u6027\u95EE\u9898\uFF08\u4E5F\u5C31\u662F\u5982\u4F55\u786E\u4FDD\u6D88\u606F\u4E0D\u4E22\u5931\uFF09\u3002</p><p>\u800C\u5F15\u5165 MQ \u6D88\u606F\u4E2D\u95F4\u4EF6\u89E3\u51B3\u6D41\u91CF\u63A7\u5236\uFF0C \u4F1A\u4F7F\u6D88\u8D39\u7AEF\u5904\u7406\u80FD\u529B\u4E0D\u8DB3\u4ECE\u800C\u5BFC\u81F4\u6D88\u606F\u79EF\u538B\uFF0C\u8FD9\u4E5F\u662F\u4F60\u8981\u89E3\u51B3\u7684\u95EE\u9898\u3002</p><p>\u6240\u4EE5\u4F60\u80FD\u53D1\u73B0\uFF0C\u95EE\u9898\u4E0E\u95EE\u9898\u4E4B\u95F4\u5F80\u5F80\u662F\u73AF\u73AF\u76F8\u6263\u7684\uFF0C\u9762\u8BD5\u5B98\u4F1A\u501F\u673A\u8003\u5BDF\u4F60\u89E3\u51B3\u95EE\u9898\u601D\u8DEF\u7684\u8FDE\u8D2F\u6027\u548C\u77E5\u8BC6\u4F53\u7CFB\u7684\u638C\u63E1\u7A0B\u5EA6\u3002</p><p>\u90A3\u9762\u5BF9\u201C\u5728\u4F7F\u7528 MQ \u6D88\u606F\u961F\u5217\u65F6\uFF0C\u5982\u4F55\u786E\u4FDD\u6D88\u606F\u4E0D\u4E22\u5931\u201D\u8FD9\u4E2A\u95EE\u9898\u65F6\uFF0C\u4F60\u8981\u600E\u4E48\u56DE\u7B54\u5462\uFF1F\u9996\u5148\uFF0C\u4F60\u8981\u5206\u6790\u5176\u4E2D\u6709\u51E0\u4E2A\u8003\u70B9\uFF0C\u6BD4\u5982\uFF1A</p><ul><li>\u5982\u4F55\u77E5\u9053\u6709\u6D88\u606F\u4E22\u5931\uFF1F</li><li>\u54EA\u4E9B\u73AF\u8282\u53EF\u80FD\u4E22\u6D88\u606F\uFF1F</li><li>\u5982\u4F55\u786E\u4FDD\u6D88\u606F\u4E0D\u4E22\u5931\uFF1F</li></ul><p><strong>\u5019\u9009\u4EBA\u5728\u56DE\u7B54\u65F6\uFF0C\u8981\u5148\u8BA9\u9762\u8BD5\u5B98\u77E5\u9053\u4F60\u7684\u5206\u6790\u601D\u8DEF\uFF0C\u7136\u540E\u518D\u63D0\u4F9B\u89E3\u51B3\u65B9\u6848</strong>\uFF1A\u7F51\u7EDC\u4E2D\u7684\u6570\u636E\u4F20\u8F93\u4E0D\u53EF\u9760\uFF0C\u60F3\u8981\u89E3\u51B3\u5982\u4F55\u4E0D\u4E22\u6D88\u606F\u7684\u95EE\u9898\uFF0C\u9996\u5148\u8981\u77E5\u9053\u54EA\u4E9B\u73AF\u8282\u53EF\u80FD\u4E22\u6D88\u606F\uFF0C\u4EE5\u53CA\u6211\u4EEC\u5982\u4F55\u77E5\u9053\u6D88\u606F\u662F\u5426\u4E22\u5931\u4E86\uFF0C\u6700\u540E\u624D\u662F\u89E3\u51B3\u65B9\u6848\uFF08\u800C\u4E0D\u662F\u4E0A\u6765\u5C31\u76F4\u63A5\u8BF4\u81EA\u5DF1\u7684\u89E3\u51B3\u65B9\u6848\uFF09\u3002\u5C31\u597D\u6BD4\u201C\u67B6\u6784\u8BBE\u8BA1\u201D\u201C\u67B6\u6784\u201D\u4F53\u73B0\u4E86\u67B6\u6784\u5E08\u7684\u601D\u8003\u8FC7\u7A0B\uFF0C\u800C\u201C\u8BBE\u8BA1\u201D\u624D\u662F\u6700\u540E\u7684\u89E3\u51B3\u65B9\u6848\uFF0C\u4E24\u8005\u7F3A\u4E00\u4E0D\u53EF\u3002</p><h3 id="\u6848\u4F8B\u89E3\u7B54" tabindex="-1"><a class="header-anchor" href="#\u6848\u4F8B\u89E3\u7B54" aria-hidden="true">#</a> \u6848\u4F8B\u89E3\u7B54</h3><p>\u6211\u4EEC\u9996\u5148\u6765\u770B\u6D88\u606F\u4E22\u5931\u7684\u73AF\u8282\uFF0C\u4E00\u6761\u6D88\u606F\u4ECE\u751F\u4EA7\u5230\u6D88\u8D39\u5B8C\u6210\u8FD9\u4E2A\u8FC7\u7A0B\uFF0C\u53EF\u4EE5\u5212\u5206\u4E09\u4E2A\u9636\u6BB5\uFF0C\u5206\u522B\u4E3A\u6D88\u606F\u751F\u4EA7\u9636\u6BB5\uFF0C\u6D88\u606F\u5B58\u50A8\u9636\u6BB5\u548C\u6D88\u606F\u6D88\u8D39\u9636\u6BB5\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mq/100-budiushi-1d1962fb-cb0f-41d0-8d6d-077ba33b6125.png" alt=""></p><p><strong>\u6D88\u606F\u751F\u4EA7\u9636\u6BB5</strong>\uFF1A \u4ECE\u6D88\u606F\u88AB\u751F\u4EA7\u51FA\u6765\uFF0C\u7136\u540E\u63D0\u4EA4\u7ED9 MQ \u7684\u8FC7\u7A0B\u4E2D\uFF0C\u53EA\u8981\u80FD\u6B63\u5E38\u6536\u5230 MQ Broker \u7684 ack \u786E\u8BA4\u54CD\u5E94\uFF0C\u5C31\u8868\u793A\u53D1\u9001\u6210\u529F\uFF0C\u6240\u4EE5\u53EA\u8981\u5904\u7406\u597D\u8FD4\u56DE\u503C\u548C\u5F02\u5E38\uFF0C\u8FD9\u4E2A\u9636\u6BB5\u662F\u4E0D\u4F1A\u51FA\u73B0\u6D88\u606F\u4E22\u5931\u7684\u3002</p><p><strong>\u6D88\u606F\u5B58\u50A8\u9636\u6BB5</strong>\uFF1A \u8FD9\u4E2A\u9636\u6BB5\u4E00\u822C\u4F1A\u76F4\u63A5\u4EA4\u7ED9 MQ \u6D88\u606F\u4E2D\u95F4\u4EF6\u6765\u4FDD\u8BC1\uFF0C\u4F46\u662F\u4F60\u8981\u4E86\u89E3\u5B83\u7684\u539F\u7406\uFF0C\u6BD4\u5982 Broker \u4F1A\u505A\u526F\u672C\uFF0C\u4FDD\u8BC1\u4E00\u6761\u6D88\u606F\u81F3\u5C11\u540C\u6B65\u4E24\u4E2A\u8282\u70B9\u518D\u8FD4\u56DE ack\u3002</p><p><strong>\u6D88\u606F\u6D88\u8D39\u9636\u6BB5</strong>\uFF1A \u6D88\u8D39\u7AEF\u4ECE Broker \u4E0A\u62C9\u53D6\u6D88\u606F\uFF0C\u53EA\u8981\u6D88\u8D39\u7AEF\u5728\u6536\u5230\u6D88\u606F\u540E\uFF0C\u4E0D\u7ACB\u5373\u53D1\u9001\u6D88\u8D39\u786E\u8BA4\u7ED9 Broker\uFF0C\u800C\u662F\u7B49\u5230\u6267\u884C\u5B8C\u4E1A\u52A1\u903B\u8F91\u540E\uFF0C\u518D\u53D1\u9001\u6D88\u8D39\u786E\u8BA4\uFF0C\u4E5F\u80FD\u4FDD\u8BC1\u6D88\u606F\u7684\u4E0D\u4E22\u5931\u3002</p><p>\u65B9\u6848\u770B\u4F3C\u4E07\u65E0\u4E00\u5931\uFF0C\u6BCF\u4E2A\u9636\u6BB5\u90FD\u80FD\u4FDD\u8BC1\u6D88\u606F\u7684\u4E0D\u4E22\u5931\uFF0C\u4F46\u5728\u5206\u5E03\u5F0F\u7CFB\u7EDF\u4E2D\uFF0C\u6545\u969C\u4E0D\u53EF\u907F\u514D\uFF0C\u4F5C\u4E3A\u6D88\u606F\u751F\u4EA7\u7AEF\uFF0C\u4F60\u5E76\u4E0D\u80FD\u4FDD\u8BC1 MQ \u662F\u4E0D\u662F\u5F04\u4E22\u4E86\u4F60\u7684\u6D88\u606F\uFF0C\u6D88\u8D39\u8005\u662F\u5426\u6D88\u8D39\u4E86\u4F60\u7684\u6D88\u606F\uFF0C\u6240\u4EE5\uFF0C\u672C\u7740 <code>Design for Failure</code> \u7684\u8BBE\u8BA1\u539F\u5219\uFF0C\u4F60\u8FD8\u662F\u9700\u8981\u4E00\u79CD\u673A\u5236\uFF0C\u6765 Check \u6D88\u606F\u662F\u5426\u4E22\u5931\u4E86\u3002</p><p><strong>\u7D27\u63A5\u7740\uFF0C\u4F60\u8FD8\u53EF\u4EE5\u5411\u9762\u8BD5\u5B98\u9610\u8FF0\u600E\u4E48\u8FDB\u884C\u6D88\u606F\u68C0\u6D4B</strong>\uFF1F \u603B\u4F53\u65B9\u6848\u89E3\u51B3\u601D\u8DEF\u4E3A\uFF1A\u5728\u6D88\u606F\u751F\u4EA7\u7AEF\uFF0C\u7ED9\u6BCF\u4E2A\u53D1\u51FA\u7684\u6D88\u606F\u90FD\u6307\u5B9A\u4E00\u4E2A\u5168\u5C40\u552F\u4E00 ID\uFF0C\u6216\u8005\u9644\u52A0\u4E00\u4E2A\u8FDE\u7EED\u9012\u589E\u7684\u7248\u672C\u53F7\uFF0C\u7136\u540E\u5728\u6D88\u8D39\u7AEF\u505A\u5BF9\u5E94\u7684\u7248\u672C\u6821\u9A8C\u3002</p><p>\u5177\u4F53\u600E\u4E48\u843D\u5730\u5B9E\u73B0\u5462\uFF1F\u4F60\u53EF\u4EE5\u5229\u7528\u62E6\u622A\u5668\u673A\u5236\u3002 \u5728\u751F\u4EA7\u7AEF\u53D1\u9001\u6D88\u606F\u4E4B\u524D\uFF0C\u901A\u8FC7\u62E6\u622A\u5668\u5C06\u6D88\u606F\u7248\u672C\u53F7\u6CE8\u5165\u6D88\u606F\u4E2D\uFF08\u7248\u672C\u53F7\u53EF\u4EE5\u91C7\u7528\u8FDE\u7EED\u9012\u589E\u7684 ID \u751F\u6210\uFF0C\u4E5F\u53EF\u4EE5\u901A\u8FC7\u5206\u5E03\u5F0F\u5168\u5C40\u552F\u4E00 ID\u751F\u6210\uFF09\u3002\u7136\u540E\u5728\u6D88\u8D39\u7AEF\u6536\u5230\u6D88\u606F\u540E\uFF0C\u518D\u901A\u8FC7\u62E6\u622A\u5668\u68C0\u6D4B\u7248\u672C\u53F7\u7684\u8FDE\u7EED\u6027\u6216\u6D88\u8D39\u72B6\u6001\uFF0C\u8FD9\u6837\u5B9E\u73B0\u7684\u597D\u5904\u662F\u6D88\u606F\u68C0\u6D4B\u7684\u4EE3\u7801\u4E0D\u4F1A\u4FB5\u5165\u5230\u4E1A\u52A1\u4EE3\u7801\u4E2D\uFF0C\u53EF\u4EE5\u901A\u8FC7\u5355\u72EC\u7684\u4EFB\u52A1\u6765\u5B9A\u4F4D\u4E22\u5931\u7684\u6D88\u606F\uFF0C\u505A\u8FDB\u4E00\u6B65\u7684\u6392\u67E5\u3002</p><p>\u8FD9\u91CC\u9700\u8981\u4F60\u6CE8\u610F\uFF1A\u5982\u679C\u540C\u65F6\u5B58\u5728\u591A\u4E2A\u6D88\u606F\u751F\u4EA7\u7AEF\u548C\u6D88\u606F\u6D88\u8D39\u7AEF\uFF0C\u901A\u8FC7\u7248\u672C\u53F7\u9012\u589E\u7684\u65B9\u5F0F\u5C31\u5F88\u96BE\u5B9E\u73B0\u4E86\uFF0C\u56E0\u4E3A\u4E0D\u80FD\u4FDD\u8BC1\u7248\u672C\u53F7\u7684\u552F\u4E00\u6027\uFF0C\u6B64\u65F6\u53EA\u80FD\u901A\u8FC7\u5168\u5C40\u552F\u4E00 ID \u7684\u65B9\u6848\u6765\u8FDB\u884C\u6D88\u606F\u68C0\u6D4B\uFF0C\u5177\u4F53\u7684\u5B9E\u73B0\u539F\u7406\u548C\u7248\u672C\u53F7\u9012\u589E\u7684\u65B9\u5F0F\u4E00\u81F4\u3002</p><p>\u73B0\u5728\uFF0C\u4F60\u5DF2\u7ECF\u77E5\u9053\u4E86\u54EA\u4E9B\u73AF\u8282\uFF08\u6D88\u606F\u5B58\u50A8\u9636\u6BB5\u3001\u6D88\u606F\u6D88\u8D39\u9636\u6BB5\uFF09\u53EF\u80FD\u4F1A\u51FA\u95EE\u9898\uFF0C\u5E76\u6709\u4E86\u5982\u4F55\u68C0\u6D4B\u6D88\u606F\u4E22\u5931\u7684\u65B9\u6848\uFF0C\u7136\u540E\u5C31\u8981\u7ED9\u51FA\u89E3\u51B3\u9632\u6B62\u6D88\u606F\u4E22\u5931\u7684\u8BBE\u8BA1\u65B9\u6848\u3002</p><p><strong>\u56DE\u7B54\u5B8C\u201C\u5982\u4F55\u786E\u4FDD\u6D88\u606F\u4E0D\u4F1A\u4E22\u5931\uFF1F\u201D 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\u6765\u4EE3\u66FF\u6570\u636E\u5E93\u5B9E\u73B0\u552F\u4E00\u7EA6\u675F\u7684\u65B9\u6848\u3002</p><p>\u5728\u8FD9\u91CC\u6211\u591A\u8BF4\u4E00\u53E5\uFF0C\u60F3\u8981\u89E3\u51B3\u201C\u6D88\u606F\u4E22\u5931\u201D\u548C\u201C\u6D88\u606F\u91CD\u590D\u6D88\u8D39\u201D\u7684\u95EE\u9898\uFF0C\u6709\u4E00\u4E2A\u524D\u63D0\u6761\u4EF6\u5C31\u662F\u8981\u5B9E\u73B0\u4E00\u4E2A\u5168\u5C40\u552F\u4E00 ID \u751F\u6210\u7684\u6280\u672F\u65B9\u6848\u3002\u8FD9\u4E5F\u662F\u9762\u8BD5\u5B98\u559C\u6B22\u8003\u5BDF\u7684\u95EE\u9898\uFF0C\u4F60\u4E5F\u8981\u638C\u63E1\u3002</p><p>\u5728\u5206\u5E03\u5F0F\u7CFB\u7EDF\u4E2D\uFF0C\u5168\u5C40\u552F\u4E00 ID \u751F\u6210\u7684\u5B9E\u73B0\u65B9\u6CD5\u6709\u6570\u636E\u5E93\u81EA\u589E\u4E3B\u952E\u3001UUID\u3001Redis\uFF0CTwitter-Snowflake \u7B97\u6CD5\uFF0C\u6211\u603B\u7ED3\u4E86\u51E0\u79CD\u65B9\u6848\u7684\u7279\u70B9\uFF0C\u4F60\u53EF\u4EE5\u53C2\u8003\u4E0B\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mq/100-budiushi-0622a500-83ef-4b8f-96d3-68c649d17311.png" alt=""></p><p>\u6211\u63D0\u9192\u4F60\u6CE8\u610F\uFF0C\u65E0\u8BBA\u54EA\u79CD\u65B9\u6CD5\uFF0C\u5982\u679C\u4F60\u60F3\u540C\u65F6\u6EE1\u8DB3\u7B80\u5355\u3001\u9AD8\u53EF\u7528\u548C\u9AD8\u6027\u80FD\uFF0C\u5C31\u8981\u6709\u53D6\u820D\uFF0C\u6240\u4EE5\u4F60\u8981\u7AD9\u5728\u5B9E\u9645\u7684\u4E1A\u52A1\u4E2D\uFF0C\u8BF4\u660E\u4F60\u7684\u9009\u578B\u6240\u8003\u8651\u7684\u5E73\u8861\u70B9\u662F\u4EC0\u4E48\u3002\u6211\u4E2A\u4EBA\u5728\u4E1A\u52A1\u4E2D\u6BD4\u8F83\u503E\u5411\u4E8E\u9009\u62E9 Snowflake \u7B97\u6CD5\uFF0C\u5728\u9879\u76EE\u4E2D\u4E5F\u8FDB\u884C\u4E86\u4E00\u5B9A\u7684\u6539\u9020\uFF0C\u4E3B\u8981\u662F\u8BA9\u7B97\u6CD5\u4E2D\u7684 ID 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\u90A3\u5C31\u662F\u5728\u6269\u5BB9\u6D88\u8D39\u8005\u7684\u5B9E\u4F8B\u6570\u7684\u540C\u65F6\uFF0C\u5FC5\u987B\u540C\u6B65\u6269\u5BB9\u4E3B\u9898 Topic \u7684\u5206\u533A\u6570\u91CF\uFF0C\u786E\u4FDD\u6D88\u8D39\u8005\u7684\u5B9E\u4F8B\u6570\u548C\u5206\u533A\u6570\u76F8\u7B49\u3002\u5982\u679C\u6D88\u8D39\u8005\u7684\u5B9E\u4F8B\u6570\u8D85\u8FC7\u4E86\u5206\u533A\u6570\uFF0C\u7531\u4E8E\u5206\u533A\u662F\u5355\u7EBF\u7A0B\u6D88\u8D39\uFF0C\u6240\u4EE5\u8FD9\u6837\u7684\u6269\u5BB9\u5C31\u6CA1\u6709\u6548\u679C\u3002</p><p>\u6BD4\u5982\u5728 Kafka \u4E2D\uFF0C\u4E00\u4E2A Topic \u53EF\u4EE5\u914D\u7F6E\u591A\u4E2A Partition\uFF08\u5206\u533A\uFF09\uFF0C\u6570\u636E\u4F1A\u88AB\u5199\u5165\u5230\u591A\u4E2A\u5206\u533A\u4E2D\uFF0C\u4F46\u5728\u6D88\u8D39\u7684\u65F6\u5019\uFF0CKafka \u7EA6\u5B9A\u4E00\u4E2A\u5206\u533A\u53EA\u80FD\u88AB\u4E00\u4E2A\u6D88\u8D39\u8005\u6D88\u8D39\uFF0CTopic \u7684\u5206\u533A\u6570\u91CF\u51B3\u5B9A\u4E86\u6D88\u8D39\u7684\u80FD\u529B\uFF0C\u6240\u4EE5\uFF0C\u53EF\u4EE5\u901A\u8FC7\u589E\u52A0\u5206\u533A\u6765\u63D0\u9AD8\u6D88\u8D39\u8005\u7684\u5904\u7406\u80FD\u529B\u3002</p><h3 id="\u603B\u7ED3" tabindex="-1"><a class="header-anchor" href="#\u603B\u7ED3" aria-hidden="true">#</a> \u603B\u7ED3</h3><p>\u81F3\u6B64\uFF0C\u6211\u4EEC\u8BB2\u89E3\u4E86 MQ \u6D88\u606F\u961F\u5217\u7684\u70ED\u95E8\u95EE\u9898\u7684\u89E3\u51B3\u65B9\u6848\uFF0C\u65E0\u8BBA\u662F\u521D\u4E2D\u7EA7\u8FD8\u662F\u9AD8\u7EA7\u7814\u53D1\u5DE5\u7A0B\u5E08\uFF0C\u672C\u7BC7\u6587\u7AE0\u7684\u5185\u5BB9\u90FD\u662F\u4F60\u9700\u8981\u638C\u63E1\u7684\uFF0C\u4F60\u90FD\u53EF\u4EE5\u4ECE\u8FD9\u51E0\u70B9\u51FA\u53D1\uFF0C\u4E0E\u9762\u8BD5\u5B98\u8FDB\u884C\u53CB\u597D\u7684\u4EA4\u6D41\u3002\u6211\u6765\u603B\u7ED3\u4E00\u4E0B\u4ECA\u5929\u7684\u91CD\u70B9\u5185\u5BB9\u3002</p><ul><li><p><strong>\u5982\u4F55\u786E\u4FDD\u6D88\u606F\u4E0D\u4F1A\u4E22\u5931</strong>\uFF1F \u4F60\u8981\u77E5\u9053\u4E00\u6761\u6D88\u606F\u4ECE\u53D1\u9001\u5230\u6D88\u8D39\u7684\u6BCF\u4E2A\u9636\u6BB5\uFF0C\u662F\u5426\u5B58\u5728\u4E22\u6D88\u606F\uFF0C\u4EE5\u53CA\u5982\u4F55\u76D1\u63A7\u6D88\u606F\u662F\u5426\u4E22\u5931\uFF0C\u6700\u540E\u624D\u662F\u5982\u4F55\u89E3\u51B3\u95EE\u9898\uFF0C\u65B9\u6848\u53EF\u4EE5\u57FA\u4E8E\u201C MQ \u7684\u53EF\u9760\u6D88\u606F\u6295\u9012 \u201D\u7684\u65B9\u5F0F\u3002</p></li><li><p><strong>\u5982\u4F55\u4FDD\u8BC1\u6D88\u606F\u4E0D\u88AB\u91CD\u590D\u6D88\u8D39</strong>\uFF1F \u5728\u8FDB\u884C\u6D88\u606F\u8865\u507F\u7684\u65F6\u5019\uFF0C\u4E00\u5B9A\u4F1A\u5B58\u5728\u91CD\u590D\u6D88\u606F\u7684\u60C5\u51B5\uFF0C\u90A3\u4E48\u5982\u4F55\u5B9E\u73B0\u6D88\u8D39\u7AEF\u7684\u5E42\u7B49\u6027\u5C31\u8FD9\u9053\u9898\u7684\u8003\u70B9\u3002</p></li><li><p><strong>\u5982\u4F55\u5904\u7406\u6D88\u606F\u79EF\u538B\u95EE\u9898</strong>\uFF1F \u8FD9\u9053\u9898\u7684\u8003\u70B9\u5C31\u662F\u5982\u4F55\u901A\u8FC7 MQ \u5B9E\u73B0\u771F\u6B63\u7684\u9AD8\u6027\u80FD\uFF0C\u56DE\u7B54\u7684\u601D\u8DEF\u662F\uFF0C\u672C\u7740\u89E3\u51B3\u7EBF\u4E0A\u5F02\u5E38\u4E3A\u6700\u9AD8\u4F18\u5148\u7EA7\uFF0C\u7136\u540E\u901A\u8FC7\u76D1\u63A7\u548C\u65E5\u5FD7\u8FDB\u884C\u6392\u67E5\u5E76\u4F18\u5316\u4E1A\u52A1\u903B\u8F91\uFF0C\u6700\u540E\u662F\u6269\u5BB9\u6D88\u8D39\u7AEF\u548C\u5206\u7247\u7684\u6570\u91CF\u3002</p></li></ul><p>\u5728\u56DE\u7B54\u95EE\u9898\u7684\u65F6\u5019\uFF0C\u4F60\u9700\u8981\u7279\u522B\u6CE8\u610F\u7684\u662F\uFF0C\u8BA9\u9762\u8BD5\u5B98\u4E86\u89E3\u5230\u4F60\u7684\u601D\u7EF4\u8FC7\u7A0B\uFF0C\u8FD9\u79CD\u89E3\u51B3\u95EE\u9898\u7684\u80FD\u529B\u662F\u9762\u8BD5\u5B98\u66F4\u4E3A\u770B\u4E2D\u7684\uFF0C\u6BD4\u4F60\u76F4\u63A5\u56DE\u7B54\u4E00\u9053\u9762\u8BD5\u9898\u66F4\u6709\u4EF7\u503C\u3002</p><p>\u53E6\u5916\uFF0C\u5982\u679C\u4F60\u5E94\u8058\u7684\u90E8\u95E8\u662F\u57FA\u7840\u67B6\u6784\u90E8\uFF0C\u90A3\u4E48\u9664\u4E86\u8981\u638C\u63E1\u672C\u8BB2\u4E2D\u7684\u5E38\u89C1\u95EE\u9898\u7684\u4E3B\u7EBF\u77E5\u8BC6\u4EE5\u5916\uFF0C\u8FD8\u8981\u638C\u63E1\u6D88\u606F\u4E2D\u95F4\u4EF6\u7684\u5176\u4ED6\u77E5\u8BC6\u4F53\u7CFB\uFF0C\u5982\uFF1A</p><ul><li>\u5982\u4F55\u9009\u578B\u6D88\u606F\u4E2D\u95F4\u4EF6\uFF1F</li><li>\u6D88\u606F\u4E2D\u95F4\u4EF6\u4E2D\u7684\u961F\u5217\u6A21\u578B\u4E0E\u53D1\u5E03\u8BA2\u9605\u6A21\u578B\u7684\u533A\u522B\uFF1F</li><li>\u4E3A\u4EC0\u4E48\u6D88\u606F\u961F\u5217\u80FD\u5B9E\u73B0\u9AD8\u541E\u5410\uFF1F</li><li>\u5E8F\u5217\u5316\u3001\u4F20\u8F93\u534F\u8BAE\uFF0C\u4EE5\u53CA\u5185\u5B58\u7BA1\u7406\u7B49\u95EE\u9898</li><li>\u2026 &gt;</li></ul><hr><blockquote><p>\u539F\u6587\u94FE\u63A5\uFF1Ahttp://t.hk.uy/Ue6</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p>',54),o=[i];function n(s,c){return p(),t("div",null,o)}var h=e(r,[["render",n],["__file","100-budiushi.html.vue"]]);export{h as default};
diff --git a/dist/assets/4-debug-skill.html.1e235b0a.js b/dist/assets/4-debug-skill.html.0c72ed75.js
similarity index 99%
rename from dist/assets/4-debug-skill.html.1e235b0a.js
rename to dist/assets/4-debug-skill.html.0c72ed75.js
index d7439722..77c9c1a3 100644
--- a/dist/assets/4-debug-skill.html.1e235b0a.js
+++ b/dist/assets/4-debug-skill.html.0c72ed75.js
@@ -1,4 +1,4 @@
-import{_ as s}from"./plugin-vue_export-helper.21dcd24c.js";import{r as t,o as i,c as o,a as e,b as c,e as p,d as n}from"./app.a0271b9c.js";const d={},l=p(`<h1 id="_4\u4E2A\u9AD8\u7EA7\u7684intellij-idea\u8C03\u8BD5\u6280\u5DE7" tabindex="-1"><a class="header-anchor" href="#_4\u4E2A\u9AD8\u7EA7\u7684intellij-idea\u8C03\u8BD5\u6280\u5DE7" aria-hidden="true">#</a> 4\u4E2A\u9AD8\u7EA7\u7684IntelliJ IDEA\u8C03\u8BD5\u6280\u5DE7</h1><p>\u5927\u5BB6\u597D\uFF0C\u6211\u662F\u4E8C\u54E5\uFF01</p><p>\u4ECA\u5929\u7ED9\u5927\u5BB6\u5E26\u6765\u51E0\u4E2A\u6211\u65E5\u5E38\u5DE5\u4F5C\u4EE5\u53CA\u9605\u8BFB\u6E90\u7801\u5FC5\u5907\u7684 IntelliJ IDEA \u9AD8\u7EA7\u8C03\u8BD5\u6280\u5DE7\uFF0C\u5206\u5206\u949F\u8981\u8D77\u98DE\u7684\u8282\u594F\u3002</p><h2 id="\u65AD\u70B9\u5904\u6DFB\u52A0-log" tabindex="-1"><a class="header-anchor" href="#\u65AD\u70B9\u5904\u6DFB\u52A0-log" aria-hidden="true">#</a> \u65AD\u70B9\u5904\u6DFB\u52A0 log</h2><p>\u5F88\u591A\u7A0B\u5E8F\u5458\u5728\u8C03\u8BD5\u4EE3\u7801\u65F6\u90FD\u559C\u6B22\xA0<code>print</code>\xA0\u4E00\u4E9B\u5185\u5BB9\uFF0C\u8FD9\u6837\u770B\u8D77\u6765\u66F4\u76F4\u89C2\uFF0Cprint \u5B8C\u4E4B\u540E\u53C8\u5F88\u5BB9\u6613\u5FD8\u8BB0\u5220\u9664\u6389\u8FD9\u4E9B\u6CA1\u7528\u7684\u5185\u5BB9\uFF0C\u6700\u7EC8\u5C06\u4EE3\u7801\u63D0\u4EA4\u5230\xA0<code>remote</code>\uFF0Ccode review \u65F6\u53C8\u4E0D\u5F97\u4E0D\u5220\u51CF\u8FD9\u4E9B\u5185\u5BB9\u91CD\u65B0\u63D0\u4EA4\uFF0C\u4E0D\u4F46\u589E\u52A0\u4E0D\u5FC5\u8981\u7684\u5DE5\u4F5C\u91CF\uFF0C\u8FD8\u8BA9\xA0<code>log tree</code>\xA0\u7684\u4E00\u4E9B\u8282\u70B9\u6CA1\u6709\u4EFB\u4F55\u4EF7\u503C</p><p>IntelliJ IDEA \u63D0\u4F9B\xA0<code>Evaluate and Log at Breakpoints</code>\xA0\u529F\u80FD\u6070\u5DE7\u53EF\u4EE5\u5E2E\u52A9\u6211\u4EEC\u89E3\u51B3\u8FD9\u4E2A\u95EE\u9898, \u6765\u770B\u4E0B\u9762\u4EE3\u7801\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">void</span> <span class="token function">main</span><span class="token punctuation">(</span><span class="token class-name">String</span><span class="token punctuation">[</span><span class="token punctuation">]</span> args<span class="token punctuation">)</span> <span class="token punctuation">{</span>
+import{_ as s}from"./plugin-vue_export-helper.21dcd24c.js";import{r as t,o as i,c as o,a as e,b as c,e as p,d as n}from"./app.615e41d8.js";const d={},l=p(`<h1 id="_4\u4E2A\u9AD8\u7EA7\u7684intellij-idea\u8C03\u8BD5\u6280\u5DE7" tabindex="-1"><a class="header-anchor" href="#_4\u4E2A\u9AD8\u7EA7\u7684intellij-idea\u8C03\u8BD5\u6280\u5DE7" aria-hidden="true">#</a> 4\u4E2A\u9AD8\u7EA7\u7684IntelliJ IDEA\u8C03\u8BD5\u6280\u5DE7</h1><p>\u5927\u5BB6\u597D\uFF0C\u6211\u662F\u4E8C\u54E5\uFF01</p><p>\u4ECA\u5929\u7ED9\u5927\u5BB6\u5E26\u6765\u51E0\u4E2A\u6211\u65E5\u5E38\u5DE5\u4F5C\u4EE5\u53CA\u9605\u8BFB\u6E90\u7801\u5FC5\u5907\u7684 IntelliJ IDEA \u9AD8\u7EA7\u8C03\u8BD5\u6280\u5DE7\uFF0C\u5206\u5206\u949F\u8981\u8D77\u98DE\u7684\u8282\u594F\u3002</p><h2 id="\u65AD\u70B9\u5904\u6DFB\u52A0-log" tabindex="-1"><a class="header-anchor" href="#\u65AD\u70B9\u5904\u6DFB\u52A0-log" aria-hidden="true">#</a> \u65AD\u70B9\u5904\u6DFB\u52A0 log</h2><p>\u5F88\u591A\u7A0B\u5E8F\u5458\u5728\u8C03\u8BD5\u4EE3\u7801\u65F6\u90FD\u559C\u6B22\xA0<code>print</code>\xA0\u4E00\u4E9B\u5185\u5BB9\uFF0C\u8FD9\u6837\u770B\u8D77\u6765\u66F4\u76F4\u89C2\uFF0Cprint \u5B8C\u4E4B\u540E\u53C8\u5F88\u5BB9\u6613\u5FD8\u8BB0\u5220\u9664\u6389\u8FD9\u4E9B\u6CA1\u7528\u7684\u5185\u5BB9\uFF0C\u6700\u7EC8\u5C06\u4EE3\u7801\u63D0\u4EA4\u5230\xA0<code>remote</code>\uFF0Ccode review \u65F6\u53C8\u4E0D\u5F97\u4E0D\u5220\u51CF\u8FD9\u4E9B\u5185\u5BB9\u91CD\u65B0\u63D0\u4EA4\uFF0C\u4E0D\u4F46\u589E\u52A0\u4E0D\u5FC5\u8981\u7684\u5DE5\u4F5C\u91CF\uFF0C\u8FD8\u8BA9\xA0<code>log tree</code>\xA0\u7684\u4E00\u4E9B\u8282\u70B9\u6CA1\u6709\u4EFB\u4F55\u4EF7\u503C</p><p>IntelliJ IDEA \u63D0\u4F9B\xA0<code>Evaluate and Log at Breakpoints</code>\xA0\u529F\u80FD\u6070\u5DE7\u53EF\u4EE5\u5E2E\u52A9\u6211\u4EEC\u89E3\u51B3\u8FD9\u4E2A\u95EE\u9898, \u6765\u770B\u4E0B\u9762\u4EE3\u7801\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">void</span> <span class="token function">main</span><span class="token punctuation">(</span><span class="token class-name">String</span><span class="token punctuation">[</span><span class="token punctuation">]</span> args<span class="token punctuation">)</span> <span class="token punctuation">{</span>
   <span class="token class-name">ThreadLocalRandom</span> random <span class="token operator">=</span> <span class="token class-name">ThreadLocalRandom</span><span class="token punctuation">.</span><span class="token function">current</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
   <span class="token keyword">int</span> count <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span>
   <span class="token keyword">for</span> <span class="token punctuation">(</span><span class="token keyword">int</span> i <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span> i <span class="token operator">&lt;</span> <span class="token number">5</span><span class="token punctuation">;</span> i<span class="token operator">++</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
diff --git a/dist/assets/40-interview.html.cb9b99de.js b/dist/assets/40-interview.html.e460eeeb.js
similarity index 99%
rename from dist/assets/40-interview.html.cb9b99de.js
rename to dist/assets/40-interview.html.e460eeeb.js
index 9253cbc4..4ba2f4cc 100644
--- a/dist/assets/40-interview.html.cb9b99de.js
+++ b/dist/assets/40-interview.html.e460eeeb.js
@@ -1,4 +1,4 @@
-import{_ as e}from"./plugin-vue_export-helper.21dcd24c.js";import{o as i,c as n,e as a}from"./app.a0271b9c.js";const d={},s=a(`<h1 id="nginx-40\u9053\u7CBE\u9009\u9762\u8BD5\u9898\u5FC5\u770B" tabindex="-1"><a class="header-anchor" href="#nginx-40\u9053\u7CBE\u9009\u9762\u8BD5\u9898\u5FC5\u770B" aria-hidden="true">#</a> Nginx\uFF1A40\u9053\u7CBE\u9009\u9762\u8BD5\u9898\u5FC5\u770B\u{1F44D}</h1><p>\u5927\u5BB6\u597D\uFF0C\u6211\u662F\u4E8C\u54E5\u5440\uFF01\u90A3\u5929\uFF0C\u6211\u5F92\u5F1F\u5C0F\u4E8C\u5077\u5077\u6478\u6478\u8DD1\u53BB\u4E86\u4E00\u5BB6\u516C\u53F8\u9762\u8BD5\uFF0C\u7ED3\u679C\u56DE\u6765\u7ED9\u6211\u8BF4\u5728 Nginx \u4E0A\u8DEA\u4E86\uFF0C\u95EE\u6211\u8BE5\u600E\u4E48\u529E\uFF1F</p><p>\u6211\u5148\u662F\u6BEB\u4E0D\u7559\u60C5\u5730\u6279\u8BC4\u4E86\u4ED6\uFF0C\u600E\u4E48\u80FD\u80CC\u7740\u9886\u5BFC\u53BB\u9762\u8BD5\u5462\uFF1F\u4E0D\u8FC7\uFF0C\u770B\u7740\u5C0F\u4E8C\u96BE\u8FC7\u7684\u8868\u60C5\uFF0C\u6211\u8FD8\u662F\u4E8E\u5FC3\u4E0D\u5FCD\uFF0C\u4E8E\u662F\u7ED9\u4ED6\u6574\u7406\u4E86 40 \u9053 Nginx \u7684\u9762\u8BD5\u9898\uFF0C\u5E0C\u671B\u80FD\u5E2E\u4ED6\u4E00\u628A\u3002</p><ul><li>\u4EC0\u4E48\u662FNginx\uFF1F</li><li>Nginx \u6709\u54EA\u4E9B\u4F18\u70B9\uFF1F</li><li>Nginx\u5E94\u7528\u573A\u666F\uFF1F</li><li>Nginx\u600E\u4E48\u5904\u7406\u8BF7\u6C42\u7684\uFF1F</li><li>Nginx \u662F\u5982\u4F55\u5B9E\u73B0\u9AD8\u5E76\u53D1\u7684\uFF1F</li><li>\u4EC0\u4E48\u662F\u6B63\u5411\u4EE3\u7406\uFF1F</li><li>\u4EC0\u4E48\u662F\u53CD\u5411\u4EE3\u7406\uFF1F</li><li>\u53CD\u5411\u4EE3\u7406\u670D\u52A1\u5668\u7684\u4F18\u70B9\u662F\u4EC0\u4E48?</li><li>Nginx\u76EE\u5F55\u7ED3\u6784\u6709\u54EA\u4E9B\uFF1F</li><li>Nginx\u914D\u7F6E\u6587\u4EF6nginx.conf\u6709\u54EA\u4E9B\u5C5E\u6027\u6A21\u5757?</li><li>cookie\u548Csession\u533A\u522B\uFF1F</li><li>\u4E3A\u4EC0\u4E48 Nginx \u4E0D\u4F7F\u7528\u591A\u7EBF\u7A0B\uFF1F</li><li>nginx\u548Capache\u7684\u533A\u522B</li><li>\u4EC0\u4E48\u662F\u52A8\u6001\u8D44\u6E90\u3001\u9759\u6001\u8D44\u6E90\u5206\u79BB\uFF1F</li><li>\u4E3A\u4EC0\u4E48\u8981\u505A\u52A8\u3001\u9759\u5206\u79BB\uFF1F</li><li>\u4EC0\u4E48\u53EB CDN \u670D\u52A1\uFF1F</li><li>Nginx\u600E\u4E48\u505A\u7684\u52A8\u9759\u5206\u79BB\uFF1F</li><li>Nginx\u8D1F\u8F7D\u5747\u8861\u7684\u7B97\u6CD5\u600E\u4E48\u5B9E\u73B0\u7684?\u7B56\u7565\u6709\u54EA\u4E9B?</li><li>\u5982\u4F55\u7528Nginx\u89E3\u51B3\u524D\u7AEF\u8DE8\u57DF\u95EE\u9898\uFF1F</li><li>Nginx\u865A\u62DF\u4E3B\u673A\u600E\u4E48\u914D\u7F6E?</li><li>location\u7684\u4F5C\u7528\u662F\u4EC0\u4E48\uFF1F</li><li>\u9650\u6D41\u600E\u4E48\u505A\u7684\uFF1F</li><li>\u6F0F\u6876\u6D41\u7B97\u6CD5\u548C\u4EE4\u724C\u6876\u7B97\u6CD5\u77E5\u9053\uFF1F</li><li>Nginx\u914D\u7F6E\u9AD8\u53EF\u7528\u6027\u600E\u4E48\u914D\u7F6E\uFF1F</li><li>Nginx\u600E\u4E48\u5224\u65AD\u522BIP\u4E0D\u53EF\u8BBF\u95EE\uFF1F</li><li>\u5728nginx\u4E2D\uFF0C\u5982\u4F55\u4F7F\u7528\u672A\u5B9A\u4E49\u7684\u670D\u52A1\u5668\u540D\u79F0\u6765\u963B\u6B62\u5904\u7406\u8BF7\u6C42\uFF1F</li><li>\u600E\u4E48\u9650\u5236\u6D4F\u89C8\u5668\u8BBF\u95EE\uFF1F</li><li>Rewrite\u5168\u5C40\u53D8\u91CF\u662F\u4EC0\u4E48\uFF1F</li><li>Nginx \u5982\u4F55\u5B9E\u73B0\u540E\u7AEF\u670D\u52A1\u7684\u5065\u5EB7\u68C0\u67E5\uFF1F</li><li>Nginx \u5982\u4F55\u5F00\u542F\u538B\u7F29\uFF1F</li><li>ngx_http_upstream_module\u7684\u4F5C\u7528\u662F\u4EC0\u4E48?</li><li>\u4EC0\u4E48\u662FC10K\u95EE\u9898?</li><li>Nginx\u662F\u5426\u652F\u6301\u5C06\u8BF7\u6C42\u538B\u7F29\u5230\u4E0A\u6E38?</li><li>\u5982\u4F55\u5728Nginx\u4E2D\u83B7\u5F97\u5F53\u524D\u7684\u65F6\u95F4?</li><li>\u7528Nginx\u670D\u52A1\u5668\u89E3\u91CA-s\u7684\u76EE\u7684\u662F\u4EC0\u4E48?</li><li>\u5982\u4F55\u5728Nginx\u670D\u52A1\u5668\u4E0A\u6DFB\u52A0\u6A21\u5757?</li><li>\u751F\u4EA7\u4E2D\u5982\u4F55\u8BBE\u7F6Eworker\u8FDB\u7A0B\u7684\u6570\u91CF\u5462\uFF1F</li><li>nginx\u72B6\u6001\u7801</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nginx/40-interview-63553177-7359-4f68-8673-5b44285cb701.png" alt=""></p><hr><h2 id="\u4EC0\u4E48\u662Fnginx" tabindex="-1"><a class="header-anchor" href="#\u4EC0\u4E48\u662Fnginx" aria-hidden="true">#</a> \u4EC0\u4E48\u662FNginx\uFF1F</h2><p>Nginx\u662F\u4E00\u4E2A \u8F7B\u91CF\u7EA7/\u9AD8\u6027\u80FD\u7684\u53CD\u5411\u4EE3\u7406Web\u670D\u52A1\u5668\uFF0C\u7528\u4E8E HTTP\u3001HTTPS\u3001SMTP\u3001POP3 \u548C IMAP \u534F\u8BAE\u3002\u4ED6\u5B9E\u73B0\u975E\u5E38\u9AD8\u6548\u7684\u53CD\u5411\u4EE3\u7406\u3001\u8D1F\u8F7D\u5E73\u8861\uFF0C\u4ED6\u53EF\u4EE5\u5904\u74062-3\u4E07\u5E76\u53D1\u8FDE\u63A5\u6570\uFF0C\u5B98\u65B9\u76D1\u6D4B\u80FD\u652F\u63015\u4E07\u5E76\u53D1\uFF0C\u73B0\u5728\u4E2D\u56FD\u4F7F\u7528nginx\u7F51\u7AD9\u7528\u6237\u6709\u5F88\u591A\uFF0C\u4F8B\u5982\uFF1A\u65B0\u6D6A\u3001\u7F51\u6613\u3001 \u817E\u8BAF\u7B49\u3002</p><h2 id="nginx-\u6709\u54EA\u4E9B\u4F18\u70B9" tabindex="-1"><a class="header-anchor" href="#nginx-\u6709\u54EA\u4E9B\u4F18\u70B9" aria-hidden="true">#</a> Nginx \u6709\u54EA\u4E9B\u4F18\u70B9\uFF1F</h2><ul><li>\u8DE8\u5E73\u53F0\u3001\u914D\u7F6E\u7B80\u5355\u3002</li><li>\u975E\u963B\u585E\u3001\u9AD8\u5E76\u53D1\u8FDE\u63A5\uFF1A\u5904\u7406 2-3 \u4E07\u5E76\u53D1\u8FDE\u63A5\u6570\uFF0C\u5B98\u65B9\u76D1\u6D4B\u80FD\u652F\u6301 5 \u4E07\u5E76\u53D1\u3002</li><li>\u5185\u5B58\u6D88\u8017\u5C0F\uFF1A\u5F00\u542F 10 \u4E2A Nginx \u624D\u5360 150M \u5185\u5B58\u3002</li><li>\u6210\u672C\u4F4E\u5EC9\uFF0C\u4E14\u5F00\u6E90\u3002</li><li>\u7A33\u5B9A\u6027\u9AD8\uFF0C\u5B95\u673A\u7684\u6982\u7387\u975E\u5E38\u5C0F\u3002</li><li>\u5185\u7F6E\u7684\u5065\u5EB7\u68C0\u67E5\u529F\u80FD\uFF1A\u5982\u679C\u6709\u4E00\u4E2A\u670D\u52A1\u5668\u5B95\u673A\uFF0C\u4F1A\u505A\u4E00\u4E2A\u5065\u5EB7\u68C0\u67E5\uFF0C\u518D\u53D1\u9001\u7684\u8BF7\u6C42\u5C31\u4E0D\u4F1A\u53D1\u9001\u5230\u5B95\u673A\u7684\u670D\u52A1\u5668\u4E86\u3002\u91CD\u65B0\u5C06\u8BF7\u6C42\u63D0\u4EA4\u5230\u5176\u4ED6\u7684\u8282\u70B9\u4E0A</li></ul><h2 id="nginx\u5E94\u7528\u573A\u666F" tabindex="-1"><a class="header-anchor" href="#nginx\u5E94\u7528\u573A\u666F" aria-hidden="true">#</a> Nginx\u5E94\u7528\u573A\u666F\uFF1F</h2><ul><li>http\u670D\u52A1\u5668\u3002Nginx\u662F\u4E00\u4E2Ahttp\u670D\u52A1\u53EF\u4EE5\u72EC\u7ACB\u63D0\u4F9Bhttp\u670D\u52A1\u3002\u53EF\u4EE5\u505A\u7F51\u9875\u9759\u6001\u670D\u52A1\u5668\u3002</li><li>\u865A\u62DF\u4E3B\u673A\u3002\u53EF\u4EE5\u5B9E\u73B0\u5728\u4E00\u53F0\u670D\u52A1\u5668\u865A\u62DF\u51FA\u591A\u4E2A\u7F51\u7AD9\uFF0C\u4F8B\u5982\u4E2A\u4EBA\u7F51\u7AD9\u4F7F\u7528\u7684\u865A\u62DF\u673A\u3002</li><li>\u53CD\u5411\u4EE3\u7406\uFF0C\u8D1F\u8F7D\u5747\u8861\u3002\u5F53\u7F51\u7AD9\u7684\u8BBF\u95EE\u91CF\u8FBE\u5230\u4E00\u5B9A\u7A0B\u5EA6\u540E\uFF0C\u5355\u53F0\u670D\u52A1\u5668\u4E0D\u80FD\u6EE1\u8DB3\u7528\u6237\u7684\u8BF7\u6C42\u65F6\uFF0C\u9700\u8981\u7528\u591A\u53F0\u670D\u52A1\u5668\u96C6\u7FA4\u53EF\u4EE5\u4F7F\u7528nginx\u505A\u53CD\u5411\u4EE3\u7406\u3002\u5E76\u4E14\u591A\u53F0\u670D\u52A1\u5668\u53EF\u4EE5\u5E73\u5747\u5206\u62C5\u8D1F\u8F7D\uFF0C\u4E0D\u4F1A\u5E94\u4E3A\u67D0\u53F0\u670D\u52A1\u5668\u8D1F\u8F7D\u9AD8\u5B95\u673A\u800C\u67D0\u53F0\u670D\u52A1\u5668\u95F2\u7F6E\u7684\u60C5\u51B5\u3002</li><li>nginz \u4E2D\u4E5F\u53EF\u4EE5\u914D\u7F6E\u5B89\u5168\u7BA1\u7406\u3001\u6BD4\u5982\u53EF\u4EE5\u4F7F\u7528Nginx\u642D\u5EFAAPI\u63A5\u53E3\u7F51\u5173,\u5BF9\u6BCF\u4E2A\u63A5\u53E3\u670D\u52A1\u8FDB\u884C\u62E6\u622A\u3002</li></ul><h2 id="nginx\u600E\u4E48\u5904\u7406\u8BF7\u6C42\u7684" tabindex="-1"><a class="header-anchor" href="#nginx\u600E\u4E48\u5904\u7406\u8BF7\u6C42\u7684" aria-hidden="true">#</a> Nginx\u600E\u4E48\u5904\u7406\u8BF7\u6C42\u7684\uFF1F</h2><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>server {         # \u7B2C\u4E00\u4E2AServer\u533A\u5757\u5F00\u59CB\uFF0C\u8868\u793A\u4E00\u4E2A\u72EC\u7ACB\u7684\u865A\u62DF\u4E3B\u673A\u7AD9\u70B9
+import{_ as e}from"./plugin-vue_export-helper.21dcd24c.js";import{o as i,c as n,e as a}from"./app.615e41d8.js";const d={},s=a(`<h1 id="nginx-40\u9053\u7CBE\u9009\u9762\u8BD5\u9898\u5FC5\u770B" tabindex="-1"><a class="header-anchor" href="#nginx-40\u9053\u7CBE\u9009\u9762\u8BD5\u9898\u5FC5\u770B" aria-hidden="true">#</a> Nginx\uFF1A40\u9053\u7CBE\u9009\u9762\u8BD5\u9898\u5FC5\u770B\u{1F44D}</h1><p>\u5927\u5BB6\u597D\uFF0C\u6211\u662F\u4E8C\u54E5\u5440\uFF01\u90A3\u5929\uFF0C\u6211\u5F92\u5F1F\u5C0F\u4E8C\u5077\u5077\u6478\u6478\u8DD1\u53BB\u4E86\u4E00\u5BB6\u516C\u53F8\u9762\u8BD5\uFF0C\u7ED3\u679C\u56DE\u6765\u7ED9\u6211\u8BF4\u5728 Nginx \u4E0A\u8DEA\u4E86\uFF0C\u95EE\u6211\u8BE5\u600E\u4E48\u529E\uFF1F</p><p>\u6211\u5148\u662F\u6BEB\u4E0D\u7559\u60C5\u5730\u6279\u8BC4\u4E86\u4ED6\uFF0C\u600E\u4E48\u80FD\u80CC\u7740\u9886\u5BFC\u53BB\u9762\u8BD5\u5462\uFF1F\u4E0D\u8FC7\uFF0C\u770B\u7740\u5C0F\u4E8C\u96BE\u8FC7\u7684\u8868\u60C5\uFF0C\u6211\u8FD8\u662F\u4E8E\u5FC3\u4E0D\u5FCD\uFF0C\u4E8E\u662F\u7ED9\u4ED6\u6574\u7406\u4E86 40 \u9053 Nginx \u7684\u9762\u8BD5\u9898\uFF0C\u5E0C\u671B\u80FD\u5E2E\u4ED6\u4E00\u628A\u3002</p><ul><li>\u4EC0\u4E48\u662FNginx\uFF1F</li><li>Nginx \u6709\u54EA\u4E9B\u4F18\u70B9\uFF1F</li><li>Nginx\u5E94\u7528\u573A\u666F\uFF1F</li><li>Nginx\u600E\u4E48\u5904\u7406\u8BF7\u6C42\u7684\uFF1F</li><li>Nginx \u662F\u5982\u4F55\u5B9E\u73B0\u9AD8\u5E76\u53D1\u7684\uFF1F</li><li>\u4EC0\u4E48\u662F\u6B63\u5411\u4EE3\u7406\uFF1F</li><li>\u4EC0\u4E48\u662F\u53CD\u5411\u4EE3\u7406\uFF1F</li><li>\u53CD\u5411\u4EE3\u7406\u670D\u52A1\u5668\u7684\u4F18\u70B9\u662F\u4EC0\u4E48?</li><li>Nginx\u76EE\u5F55\u7ED3\u6784\u6709\u54EA\u4E9B\uFF1F</li><li>Nginx\u914D\u7F6E\u6587\u4EF6nginx.conf\u6709\u54EA\u4E9B\u5C5E\u6027\u6A21\u5757?</li><li>cookie\u548Csession\u533A\u522B\uFF1F</li><li>\u4E3A\u4EC0\u4E48 Nginx \u4E0D\u4F7F\u7528\u591A\u7EBF\u7A0B\uFF1F</li><li>nginx\u548Capache\u7684\u533A\u522B</li><li>\u4EC0\u4E48\u662F\u52A8\u6001\u8D44\u6E90\u3001\u9759\u6001\u8D44\u6E90\u5206\u79BB\uFF1F</li><li>\u4E3A\u4EC0\u4E48\u8981\u505A\u52A8\u3001\u9759\u5206\u79BB\uFF1F</li><li>\u4EC0\u4E48\u53EB CDN \u670D\u52A1\uFF1F</li><li>Nginx\u600E\u4E48\u505A\u7684\u52A8\u9759\u5206\u79BB\uFF1F</li><li>Nginx\u8D1F\u8F7D\u5747\u8861\u7684\u7B97\u6CD5\u600E\u4E48\u5B9E\u73B0\u7684?\u7B56\u7565\u6709\u54EA\u4E9B?</li><li>\u5982\u4F55\u7528Nginx\u89E3\u51B3\u524D\u7AEF\u8DE8\u57DF\u95EE\u9898\uFF1F</li><li>Nginx\u865A\u62DF\u4E3B\u673A\u600E\u4E48\u914D\u7F6E?</li><li>location\u7684\u4F5C\u7528\u662F\u4EC0\u4E48\uFF1F</li><li>\u9650\u6D41\u600E\u4E48\u505A\u7684\uFF1F</li><li>\u6F0F\u6876\u6D41\u7B97\u6CD5\u548C\u4EE4\u724C\u6876\u7B97\u6CD5\u77E5\u9053\uFF1F</li><li>Nginx\u914D\u7F6E\u9AD8\u53EF\u7528\u6027\u600E\u4E48\u914D\u7F6E\uFF1F</li><li>Nginx\u600E\u4E48\u5224\u65AD\u522BIP\u4E0D\u53EF\u8BBF\u95EE\uFF1F</li><li>\u5728nginx\u4E2D\uFF0C\u5982\u4F55\u4F7F\u7528\u672A\u5B9A\u4E49\u7684\u670D\u52A1\u5668\u540D\u79F0\u6765\u963B\u6B62\u5904\u7406\u8BF7\u6C42\uFF1F</li><li>\u600E\u4E48\u9650\u5236\u6D4F\u89C8\u5668\u8BBF\u95EE\uFF1F</li><li>Rewrite\u5168\u5C40\u53D8\u91CF\u662F\u4EC0\u4E48\uFF1F</li><li>Nginx \u5982\u4F55\u5B9E\u73B0\u540E\u7AEF\u670D\u52A1\u7684\u5065\u5EB7\u68C0\u67E5\uFF1F</li><li>Nginx \u5982\u4F55\u5F00\u542F\u538B\u7F29\uFF1F</li><li>ngx_http_upstream_module\u7684\u4F5C\u7528\u662F\u4EC0\u4E48?</li><li>\u4EC0\u4E48\u662FC10K\u95EE\u9898?</li><li>Nginx\u662F\u5426\u652F\u6301\u5C06\u8BF7\u6C42\u538B\u7F29\u5230\u4E0A\u6E38?</li><li>\u5982\u4F55\u5728Nginx\u4E2D\u83B7\u5F97\u5F53\u524D\u7684\u65F6\u95F4?</li><li>\u7528Nginx\u670D\u52A1\u5668\u89E3\u91CA-s\u7684\u76EE\u7684\u662F\u4EC0\u4E48?</li><li>\u5982\u4F55\u5728Nginx\u670D\u52A1\u5668\u4E0A\u6DFB\u52A0\u6A21\u5757?</li><li>\u751F\u4EA7\u4E2D\u5982\u4F55\u8BBE\u7F6Eworker\u8FDB\u7A0B\u7684\u6570\u91CF\u5462\uFF1F</li><li>nginx\u72B6\u6001\u7801</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nginx/40-interview-63553177-7359-4f68-8673-5b44285cb701.png" alt=""></p><hr><h2 id="\u4EC0\u4E48\u662Fnginx" tabindex="-1"><a class="header-anchor" href="#\u4EC0\u4E48\u662Fnginx" aria-hidden="true">#</a> \u4EC0\u4E48\u662FNginx\uFF1F</h2><p>Nginx\u662F\u4E00\u4E2A \u8F7B\u91CF\u7EA7/\u9AD8\u6027\u80FD\u7684\u53CD\u5411\u4EE3\u7406Web\u670D\u52A1\u5668\uFF0C\u7528\u4E8E HTTP\u3001HTTPS\u3001SMTP\u3001POP3 \u548C IMAP \u534F\u8BAE\u3002\u4ED6\u5B9E\u73B0\u975E\u5E38\u9AD8\u6548\u7684\u53CD\u5411\u4EE3\u7406\u3001\u8D1F\u8F7D\u5E73\u8861\uFF0C\u4ED6\u53EF\u4EE5\u5904\u74062-3\u4E07\u5E76\u53D1\u8FDE\u63A5\u6570\uFF0C\u5B98\u65B9\u76D1\u6D4B\u80FD\u652F\u63015\u4E07\u5E76\u53D1\uFF0C\u73B0\u5728\u4E2D\u56FD\u4F7F\u7528nginx\u7F51\u7AD9\u7528\u6237\u6709\u5F88\u591A\uFF0C\u4F8B\u5982\uFF1A\u65B0\u6D6A\u3001\u7F51\u6613\u3001 \u817E\u8BAF\u7B49\u3002</p><h2 id="nginx-\u6709\u54EA\u4E9B\u4F18\u70B9" tabindex="-1"><a class="header-anchor" href="#nginx-\u6709\u54EA\u4E9B\u4F18\u70B9" aria-hidden="true">#</a> Nginx \u6709\u54EA\u4E9B\u4F18\u70B9\uFF1F</h2><ul><li>\u8DE8\u5E73\u53F0\u3001\u914D\u7F6E\u7B80\u5355\u3002</li><li>\u975E\u963B\u585E\u3001\u9AD8\u5E76\u53D1\u8FDE\u63A5\uFF1A\u5904\u7406 2-3 \u4E07\u5E76\u53D1\u8FDE\u63A5\u6570\uFF0C\u5B98\u65B9\u76D1\u6D4B\u80FD\u652F\u6301 5 \u4E07\u5E76\u53D1\u3002</li><li>\u5185\u5B58\u6D88\u8017\u5C0F\uFF1A\u5F00\u542F 10 \u4E2A Nginx \u624D\u5360 150M \u5185\u5B58\u3002</li><li>\u6210\u672C\u4F4E\u5EC9\uFF0C\u4E14\u5F00\u6E90\u3002</li><li>\u7A33\u5B9A\u6027\u9AD8\uFF0C\u5B95\u673A\u7684\u6982\u7387\u975E\u5E38\u5C0F\u3002</li><li>\u5185\u7F6E\u7684\u5065\u5EB7\u68C0\u67E5\u529F\u80FD\uFF1A\u5982\u679C\u6709\u4E00\u4E2A\u670D\u52A1\u5668\u5B95\u673A\uFF0C\u4F1A\u505A\u4E00\u4E2A\u5065\u5EB7\u68C0\u67E5\uFF0C\u518D\u53D1\u9001\u7684\u8BF7\u6C42\u5C31\u4E0D\u4F1A\u53D1\u9001\u5230\u5B95\u673A\u7684\u670D\u52A1\u5668\u4E86\u3002\u91CD\u65B0\u5C06\u8BF7\u6C42\u63D0\u4EA4\u5230\u5176\u4ED6\u7684\u8282\u70B9\u4E0A</li></ul><h2 id="nginx\u5E94\u7528\u573A\u666F" tabindex="-1"><a class="header-anchor" href="#nginx\u5E94\u7528\u573A\u666F" aria-hidden="true">#</a> Nginx\u5E94\u7528\u573A\u666F\uFF1F</h2><ul><li>http\u670D\u52A1\u5668\u3002Nginx\u662F\u4E00\u4E2Ahttp\u670D\u52A1\u53EF\u4EE5\u72EC\u7ACB\u63D0\u4F9Bhttp\u670D\u52A1\u3002\u53EF\u4EE5\u505A\u7F51\u9875\u9759\u6001\u670D\u52A1\u5668\u3002</li><li>\u865A\u62DF\u4E3B\u673A\u3002\u53EF\u4EE5\u5B9E\u73B0\u5728\u4E00\u53F0\u670D\u52A1\u5668\u865A\u62DF\u51FA\u591A\u4E2A\u7F51\u7AD9\uFF0C\u4F8B\u5982\u4E2A\u4EBA\u7F51\u7AD9\u4F7F\u7528\u7684\u865A\u62DF\u673A\u3002</li><li>\u53CD\u5411\u4EE3\u7406\uFF0C\u8D1F\u8F7D\u5747\u8861\u3002\u5F53\u7F51\u7AD9\u7684\u8BBF\u95EE\u91CF\u8FBE\u5230\u4E00\u5B9A\u7A0B\u5EA6\u540E\uFF0C\u5355\u53F0\u670D\u52A1\u5668\u4E0D\u80FD\u6EE1\u8DB3\u7528\u6237\u7684\u8BF7\u6C42\u65F6\uFF0C\u9700\u8981\u7528\u591A\u53F0\u670D\u52A1\u5668\u96C6\u7FA4\u53EF\u4EE5\u4F7F\u7528nginx\u505A\u53CD\u5411\u4EE3\u7406\u3002\u5E76\u4E14\u591A\u53F0\u670D\u52A1\u5668\u53EF\u4EE5\u5E73\u5747\u5206\u62C5\u8D1F\u8F7D\uFF0C\u4E0D\u4F1A\u5E94\u4E3A\u67D0\u53F0\u670D\u52A1\u5668\u8D1F\u8F7D\u9AD8\u5B95\u673A\u800C\u67D0\u53F0\u670D\u52A1\u5668\u95F2\u7F6E\u7684\u60C5\u51B5\u3002</li><li>nginz \u4E2D\u4E5F\u53EF\u4EE5\u914D\u7F6E\u5B89\u5168\u7BA1\u7406\u3001\u6BD4\u5982\u53EF\u4EE5\u4F7F\u7528Nginx\u642D\u5EFAAPI\u63A5\u53E3\u7F51\u5173,\u5BF9\u6BCF\u4E2A\u63A5\u53E3\u670D\u52A1\u8FDB\u884C\u62E6\u622A\u3002</li></ul><h2 id="nginx\u600E\u4E48\u5904\u7406\u8BF7\u6C42\u7684" tabindex="-1"><a class="header-anchor" href="#nginx\u600E\u4E48\u5904\u7406\u8BF7\u6C42\u7684" aria-hidden="true">#</a> Nginx\u600E\u4E48\u5904\u7406\u8BF7\u6C42\u7684\uFF1F</h2><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>server {         # \u7B2C\u4E00\u4E2AServer\u533A\u5757\u5F00\u59CB\uFF0C\u8868\u793A\u4E00\u4E2A\u72EC\u7ACB\u7684\u865A\u62DF\u4E3B\u673A\u7AD9\u70B9
    listen       80\uFF1B # \u63D0\u4F9B\u670D\u52A1\u7684\u7AEF\u53E3\uFF0C\u9ED8\u8BA480
    server_name  localhost; # \u63D0\u4F9B\u670D\u52A1\u7684\u57DF\u540D\u4E3B\u673A\u540D
    location / { # \u7B2C\u4E00\u4E2Alocation\u533A\u5757\u5F00\u59CB
diff --git a/dist/assets/404.5ae72665.js b/dist/assets/404.c61acaed.js
similarity index 98%
rename from dist/assets/404.5ae72665.js
rename to dist/assets/404.c61acaed.js
index b15ce64d..e376579c 100644
--- a/dist/assets/404.5ae72665.js
+++ b/dist/assets/404.c61acaed.js
@@ -1 +1 @@
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stop-opacity="0"/></linearGradient><linearGradient id="f" x1=".5" x2=".5" y2="1" gradientUnits="objectBoundingBox"><stop offset="0" stop-color="#e8e8e8"/><stop offset="1" stop-color="#fff" stop-opacity="0"/></linearGradient><linearGradient id="g" x1=".213" y1="1.265" x2=".846" gradientUnits="objectBoundingBox"><stop offset="0" stop-color="#fff"/><stop offset="1" stop-color="#f5f5f5"/></linearGradient><linearGradient id="h" x1=".5" x2=".5" y2="1" gradientUnits="objectBoundingBox"><stop offset="0" stop-color="#c5c5c5"/><stop offset="1" stop-color="#fff" stop-opacity="0"/></linearGradient><linearGradient id="i" x1=".5" x2=".5" y2="1" gradientUnits="objectBoundingBox"><stop offset="0" stop-color="#acacac"/><stop offset="1" stop-color="#f2f2f2" stop-opacity=".388"/></linearGradient><clipPath id="a"><path transform="translate(744 1111)" fill="none" d="M0 0h178v130H0z"/></clipPath></defs><g transform="translate(-744 -1111)" clip-path="url(#a)"><path d="M0 10.795 36.6 0v93.779L0 104.574z" 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1.508h8.447v-1.508z"/></g></g>'});var u=s({name:"404",setup(){var a;const l=i(),o=f(),n=()=>{const e=o.value.routeLocales["404msg"];return e[Math.floor(Math.random()*e.length)]},{navigate:r}=c({to:(a=o.value.home)!=null?a:l.value});return()=>[t(d),t(p("CommonWrapper"),{sidebar:!1},()=>t("main",{class:"page not-found",id:"main-content"},[t(h),t("blockquote",n()),t("button",{class:"action-button",onClick:()=>{window.history.go(-1)}},o.value.routeLocales.back),t("button",{class:"action-button",onClick:()=>r()},o.value.routeLocales.home)]))]}});export{u as default};
+import{h as t,f as s,u as i,g as f,i as c,r as p}from"./app.615e41d8.js";import{S as d}from"./SkipLink.a2c3a90f.js";const h=()=>t("svg",{xmlns:"http://www.w3.org/2000/svg",class:"page-404-icon",viewBox:"0 0 178 130",innerHTML:'<defs><linearGradient id="b" x1=".5" x2=".5" y2="1" gradientUnits="objectBoundingBox"><stop offset="0" stop-color="#e9e9e9"/><stop offset="1" stop-color="#fff" stop-opacity="0"/></linearGradient><linearGradient id="c" x1=".5" x2=".5" y2="1" gradientUnits="objectBoundingBox"><stop offset="0" stop-color="#dcdcdc"/><stop offset="1" stop-color="#fff" stop-opacity="0"/></linearGradient><linearGradient id="d" x1=".5" x2=".5" y2="1" gradientUnits="objectBoundingBox"><stop offset="0" stop-color="#f1f1f1"/><stop offset="1" stop-color="#fff" stop-opacity="0"/></linearGradient><linearGradient id="e" x1=".5" x2=".5" y2="1" gradientUnits="objectBoundingBox"><stop offset="0" stop-color="#dedede"/><stop offset="1" stop-color="#fff" 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transform="translate(772.466 1122.142)" fill="url(#b)"/><path d="M-8.492 10.642-26.361-.469v93.78l17.868 11.111z" transform="translate(780.958 1122.293)" fill="url(#c)"/><path d="M-8.5 5.55 28.106-5.3 10.228-16.437l-36.6 10.845z" transform="translate(780.963 1127.438)" fill="url(#d)"/><path d="M0 10.539 35.741 0v91.56L0 102.1z" transform="translate(870.158 1123.617)" fill="url(#d)"/><path d="M-8.913 10.38-26.361-.469v91.562l17.448 10.848z" transform="translate(879.071 1123.775)" fill="url(#e)"/><path d="m-8.918 5.032 35.741-10.59L9.366-16.437-26.375-5.848z" transform="translate(879.076 1129.175)" fill="url(#d)"/><path d="M0 9.137 30.839 0v79.381L0 88.519z" transform="translate(799.678 1151.579)" fill="url(#f)"/><path d="m-11.306 8.936-15.054-9.4v79.377l15.054 9.4z" transform="translate(810.985 1151.78)" fill="url(#c)"/><path d="M-11.313 2.087 19.526-7.05 4.464-16.437-26.375-7.3z" transform="translate(810.991 1158.63)" fill="url(#g)"/><path d="M178 53H0a51.361 51.361 0 0 1 10.453-20.952 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3.39v13.791a4.862 4.862 0 0 0 1.075 3.391 4.29 4.29 0 0 0 3.327 1.178zm14.928-4.61 10.181-21.97h4.381l-9.931 21.719h14.876v3.941h-19.507zm13.081-9.493h4.152v17.859h-4.152z" fill="#c6c6c6"/><path d="m798.306 1192.431 10.182-21.97h4.381l-9.931 21.719h14.876v3.941h-19.508zm13.081-9.493h4.152v17.859h-4.152zm20.728 18.151q-4.256 0-6.457-2.274a8.74 8.74 0 0 1-2.2-6.343v-13.791a8.708 8.708 0 0 1 2.21-6.353q2.212-2.264 6.447-2.264 4.256 0 6.457 2.253a8.726 8.726 0 0 1 2.2 6.363v13.792a8.708 8.708 0 0 1-2.21 6.349q-2.211 2.268-6.447 2.268zm0-4.048a4.29 4.29 0 0 0 3.328-1.178 4.862 4.862 0 0 0 1.074-3.39v-13.792a4.893 4.893 0 0 0-1.064-3.39 4.285 4.285 0 0 0-3.338-1.179 4.285 4.285 0 0 0-3.338 1.179 4.893 4.893 0 0 0-1.064 3.39v13.791a4.862 4.862 0 0 0 1.075 3.391 4.29 4.29 0 0 0 3.327 1.178zm14.928-4.61 10.181-21.97h4.381l-9.931 21.719h14.876v3.941h-19.507zm13.081-9.493h4.152v17.859h-4.152z" fill="#b2b2b2"/><path d="m-27.694-19.435 10.182 14.517h4.381l-9.931-14.352h14.876v-2.606h-19.508zm13.081 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1.508h8.447v-1.508z"/></g></g>'});var u=s({name:"404",setup(){var a;const l=i(),o=f(),n=()=>{const e=o.value.routeLocales["404msg"];return e[Math.floor(Math.random()*e.length)]},{navigate:r}=c({to:(a=o.value.home)!=null?a:l.value});return()=>[t(d),t(p("CommonWrapper"),{sidebar:!1},()=>t("main",{class:"page not-found",id:"main-content"},[t(h),t("blockquote",n()),t("button",{class:"action-button",onClick:()=>{window.history.go(-1)}},o.value.routeLocales.back),t("button",{class:"action-button",onClick:()=>r()},o.value.routeLocales.home)]))]}});export{u as default};
diff --git a/dist/assets/404.html.5c274669.js b/dist/assets/404.html.6cb935de.js
similarity index 71%
rename from dist/assets/404.html.5c274669.js
rename to dist/assets/404.html.6cb935de.js
index a365e3c8..795a0132 100644
--- a/dist/assets/404.html.5c274669.js
+++ b/dist/assets/404.html.6cb935de.js
@@ -1 +1 @@
-import{_ as e}from"./plugin-vue_export-helper.21dcd24c.js";import{o as r,c as t}from"./app.a0271b9c.js";const _={};function c(o,a){return r(),t("div")}var m=e(_,[["render",c],["__file","404.html.vue"]]);export{m as default};
+import{_ as e}from"./plugin-vue_export-helper.21dcd24c.js";import{o as r,c as t}from"./app.615e41d8.js";const _={};function c(o,a){return r(),t("div")}var m=e(_,[["render",c],["__file","404.html.vue"]]);export{m as default};
diff --git a/dist/assets/48-keywords.html.34eb30fe.js b/dist/assets/48-keywords.html.c30c9b30.js
similarity index 98%
rename from dist/assets/48-keywords.html.34eb30fe.js
rename to dist/assets/48-keywords.html.c30c9b30.js
index c798242b..2ab1a67e 100644
--- a/dist/assets/48-keywords.html.34eb30fe.js
+++ b/dist/assets/48-keywords.html.c30c9b30.js
@@ -1 +1 @@
-import{_ as i}from"./plugin-vue_export-helper.21dcd24c.js";import{r as l,o as r,c as p,a as t,b as e,d as o,e as n}from"./app.a0271b9c.js";const g={},a=t("h1",{id:"java\u4E2D\u5E38\u7528\u768448\u4E2A\u5173\u952E\u5B57",tabindex:"-1"},[t("a",{class:"header-anchor",href:"#java\u4E2D\u5E38\u7528\u768448\u4E2A\u5173\u952E\u5B57","aria-hidden":"true"},"#"),o(" Java\u4E2D\u5E38\u7528\u768448\u4E2A\u5173\u952E\u5B57")],-1),c=t("p",null,"\u201C\u4E8C\u54E5\uFF0C\u5C31\u6211\u4E4B\u524D\u5B66\u8FC7\u7684\u8FD9\u4E9B Java \u4EE3\u7801\u4E2D\uFF0C\u6709 public\u3001static\u3001void\u3001main \u7B49\u7B49\uFF0C\u5B83\u4EEC\u5E94\u8BE5\u90FD\u662F\u5173\u952E\u5B57\u5427\uFF1F\u201D\u4E09\u59B9\u7684\u8138\u4E0A\u6CDB\u7740\u751C\u751C\u7684\u7B11\u5BB9\uFF0C\u6211\u60F3\u5979\u5728\u5B66\u4E60 Java \u65B9\u9762\u5DF2\u7ECF\u53D8\u5F97\u8D8A\u6765\u8D8A\u81EA\u4FE1\u4E86\u3002",-1),d=t("p",null,"\u201C\u662F\u7684\uFF0C\u4E09\u59B9\u3002Java \u4E2D\u7684\u5173\u952E\u5B57\u53EF\u4E0D\u5C11\u5462\uFF01\u4F60\u4E00\u4E0B\u5B50\u53EF\u80FD\u8BB0\u4E0D\u4E86\u90A3\u4E48\u591A\uFF0C\u4E0D\u8FC7\uFF0C\u5148\u4FDD\u7559\u4E2A\u5370\u8C61\u5427\uFF0C\u5BF9\u4EE5\u540E\u7684\u5B66\u4E60\u4F1A\u5F88\u6709\u5E2E\u52A9\u3002\u201D",-1),_=t("p",null,"PS\uFF1A\u6309\u7167\u9996\u5B57\u6BCD\u7684\u81EA\u7136\u987A\u5E8F\u6392\u5217\u3002",-1),h=n("<li><p><strong>abstract\uFF1A</strong> \u7528\u4E8E\u58F0\u660E\u62BD\u8C61\u7C7B\uFF0C\u4EE5\u53CA\u62BD\u8C61\u65B9\u6CD5\u3002</p></li><li><p><strong>boolean\uFF1A</strong> \u7528\u4E8E\u5C06\u53D8\u91CF\u58F0\u660E\u4E3A\u5E03\u5C14\u503C\u7C7B\u578B\uFF0C\u53EA\u6709 true \u548C false \u4E24\u4E2A\u503C\u3002</p></li><li><p><strong>break\uFF1A</strong> \u7528\u4E8E\u4E2D\u65AD\u5FAA\u73AF\u6216 switch \u8BED\u53E5\u3002</p></li><li><p><strong>byte\uFF1A</strong> \u7528\u4E8E\u58F0\u660E\u4E00\u4E2A\u53EF\u4EE5\u5BB9\u7EB3 8 \u4E2A\u6BD4\u7279\u7684\u53D8\u91CF\u3002</p></li><li><p><strong>case\uFF1A</strong> \u7528\u4E8E\u5728 switch \u8BED\u53E5\u4E2D\u6807\u8BB0\u6761\u4EF6\u7684\u503C\u3002</p></li><li><p><strong>catch\uFF1A</strong> \u7528\u4E8E\u6355\u83B7 try \u8BED\u53E5\u4E2D\u7684\u5F02\u5E38\u3002</p></li>",6),u=t("strong",null,"char\uFF1A",-1),f=o(" \u7528\u4E8E\u58F0\u660E\u4E00\u4E2A\u53EF\u4EE5\u5BB9\u7EB3\u65E0\u7B26\u53F7 16 \u4F4D\u6BD4\u7279\u7684 "),m={href:"https://mp.weixin.qq.com/s/pNQjlXOivIgO3pbYc0GnpA",target:"_blank",rel:"noopener noreferrer"},v=o("Unicode \u5B57\u7B26"),b=o("\u7684\u53D8\u91CF\u3002"),w=n("<li><p><strong>class\uFF1A</strong> \u7528\u4E8E\u58F0\u660E\u4E00\u4E2A\u7C7B\u3002</p></li><li><p><strong>continue\uFF1A</strong> \u7528\u4E8E\u7EE7\u7EED\u4E0B\u4E00\u4E2A\u5FAA\u73AF\uFF0C\u53EF\u4EE5\u5728\u6307\u5B9A\u6761\u4EF6\u4E0B\u8DF3\u8FC7\u5176\u4F59\u4EE3\u7801\u3002</p></li><li><p><strong>default\uFF1A</strong> \u7528\u4E8E\u6307\u5B9A switch \u8BED\u53E5\u4E2D\u9664\u53BB case \u6761\u4EF6\u4E4B\u5916\u7684\u9ED8\u8BA4\u4EE3\u7801\u5757\u3002</p></li><li><p><strong>do\uFF1A</strong> \u901A\u5E38\u548C while \u5173\u952E\u5B57\u914D\u5408\u4F7F\u7528\uFF0Cdo \u540E\u7D27\u8DDF\u5FAA\u73AF\u4F53\u3002</p></li><li><p><strong>double\uFF1A</strong> \u7528\u4E8E\u58F0\u660E\u4E00\u4E2A\u53EF\u4EE5\u5BB9\u7EB3 64 \u4F4D\u6D6E\u70B9\u6570\u7684\u53D8\u91CF\u3002</p></li><li><p><strong>else\uFF1A</strong> \u7528\u4E8E\u6307\u793A if \u8BED\u53E5\u4E2D\u7684\u5907\u7528\u5206\u652F\u3002</p></li><li><p><strong>enum\uFF1A</strong> \u7528\u4E8E\u5B9A\u4E49\u4E00\u7EC4\u56FA\u5B9A\u7684\u5E38\u91CF\uFF08\u679A\u4E3E\uFF09\u3002</p></li><li><p><strong>extends\uFF1A</strong> \u7528\u4E8E\u6307\u793A\u4E00\u4E2A\u7C7B\u662F\u4ECE\u53E6\u4E00\u4E2A\u7C7B\u6216\u63A5\u53E3\u7EE7\u627F\u7684\u3002</p></li><li><p><strong>final\uFF1A</strong> \u7528\u4E8E\u6307\u793A\u8BE5\u53D8\u91CF\u662F\u4E0D\u53EF\u66F4\u6539\u7684\u3002</p></li><li><p><strong>finally\uFF1A</strong> \u548C <code>try-catch</code> \u914D\u5408\u4F7F\u7528\uFF0C\u8868\u793A\u65E0\u8BBA\u662F\u5426\u5904\u7406\u5F02\u5E38\uFF0C\u603B\u662F\u6267\u884C finally \u5757\u4E2D\u7684\u4EE3\u7801\u3002</p></li><li><p><strong>float\uFF1A</strong> \u7528\u4E8E\u58F0\u660E\u4E00\u4E2A\u53EF\u4EE5\u5BB9\u7EB3 32 \u4F4D\u6D6E\u70B9\u6570\u7684\u53D8\u91CF\u3002</p></li><li><p><strong>for\uFF1A</strong> \u7528\u4E8E\u58F0\u660E\u4E00\u4E2A for \u5FAA\u73AF\uFF0C\u5982\u679C\u5FAA\u73AF\u6B21\u6570\u662F\u56FA\u5B9A\u7684\uFF0C\u5EFA\u8BAE\u4F7F\u7528 for \u5FAA\u73AF\u3002</p></li><li><p><strong>if\uFF1A</strong> \u7528\u4E8E\u6307\u5B9A\u6761\u4EF6\uFF0C\u5982\u679C\u6761\u4EF6\u4E3A\u771F\uFF0C\u5219\u6267\u884C\u5BF9\u5E94\u4EE3\u7801\u3002</p></li><li><p><strong>implements\uFF1A</strong> \u7528\u4E8E\u5B9E\u73B0\u63A5\u53E3\u3002</p></li><li><p><strong>import\uFF1A</strong> \u7528\u4E8E\u5BFC\u5165\u5BF9\u5E94\u7684\u7C7B\u6216\u8005\u63A5\u53E3\u3002</p></li><li><p><strong>instanceof\uFF1A</strong> \u7528\u4E8E\u5224\u65AD\u5BF9\u8C61\u662F\u5426\u5C5E\u4E8E\u67D0\u4E2A\u7C7B\u578B\uFF08class\uFF09\u3002</p></li><li><p><strong>int\uFF1A</strong> \u7528\u4E8E\u58F0\u660E\u4E00\u4E2A\u53EF\u4EE5\u5BB9\u7EB3 32 \u4F4D\u5E26\u7B26\u53F7\u7684\u6574\u6570\u53D8\u91CF\u3002</p></li><li><p><strong>interface\uFF1A</strong> \u7528\u4E8E\u58F0\u660E\u63A5\u53E3\u3002</p></li><li><p><strong>long\uFF1A</strong> \u7528\u4E8E\u58F0\u660E\u4E00\u4E2A\u53EF\u4EE5\u5BB9\u7EB3 64 \u4F4D\u6574\u6570\u7684\u53D8\u91CF\u3002</p></li><li><p><strong>native\uFF1A</strong> \u7528\u4E8E\u6307\u5B9A\u4E00\u4E2A\u65B9\u6CD5\u662F\u901A\u8FC7\u8C03\u7528\u672C\u673A\u63A5\u53E3\uFF08\u975E Java\uFF09\u5B9E\u73B0\u7684\u3002</p></li><li><p><strong>new\uFF1A</strong> \u7528\u4E8E\u521B\u5EFA\u4E00\u4E2A\u65B0\u7684\u5BF9\u8C61\u3002</p></li><li><p><strong>null\uFF1A</strong> \u5982\u679C\u4E00\u4E2A\u53D8\u91CF\u662F\u7A7A\u7684\uFF08\u4EC0\u4E48\u5F15\u7528\u4E5F\u6CA1\u6709\u6307\u5411\uFF09\uFF0C\u5C31\u53EF\u4EE5\u5C06\u5B83\u8D4B\u503C\u4E3A null\uFF0C\u548C\u7A7A\u6307\u9488\u5F02\u5E38\u606F\u606F\u76F8\u5173\u3002</p></li><li><p><strong>package\uFF1A</strong> \u7528\u4E8E\u58F0\u660E\u7C7B\u6240\u5728\u7684\u5305\u3002</p></li><li><p><strong>private\uFF1A</strong> \u4E00\u4E2A\u8BBF\u95EE\u6743\u9650\u4FEE\u9970\u7B26\uFF0C\u8868\u793A\u65B9\u6CD5\u6216\u53D8\u91CF\u53EA\u5BF9\u5F53\u524D\u7C7B\u53EF\u89C1\u3002</p></li><li><p><strong>protected\uFF1A</strong> \u4E00\u4E2A\u8BBF\u95EE\u6743\u9650\u4FEE\u9970\u7B26\uFF0C\u8868\u793A\u65B9\u6CD5\u6216\u53D8\u91CF\u5BF9\u540C\u4E00\u5305\u5185\u7684\u7C7B\u548C\u6240\u6709\u5B50\u7C7B\u53EF\u89C1\u3002</p></li><li><p><strong>public\uFF1A</strong> \u4E00\u4E2A\u8BBF\u95EE\u6743\u9650\u4FEE\u9970\u7B26\uFF0C\u9664\u4E86\u53EF\u4EE5\u58F0\u660E\u65B9\u6CD5\u548C\u53D8\u91CF\uFF08\u6240\u6709\u7C7B\u53EF\u89C1\uFF09\uFF0C\u8FD8\u53EF\u4EE5\u58F0\u660E\u7C7B\u3002<code>main()</code> \u65B9\u6CD5\u5FC5\u987B\u58F0\u660E\u4E3A public\u3002</p></li><li><p><strong>return\uFF1A</strong> \u7528\u4E8E\u5728\u4EE3\u7801\u6267\u884C\u5B8C\u6210\u540E\u8FD4\u56DE\uFF08\u4E00\u4E2A\u503C\uFF09\u3002</p></li><li><p><strong>short\uFF1A</strong> \u7528\u4E8E\u58F0\u660E\u4E00\u4E2A\u53EF\u4EE5\u5BB9\u7EB3 16 \u4F4D\u6574\u6570\u7684\u53D8\u91CF\u3002</p></li><li><p><strong>static\uFF1A</strong> \u8868\u793A\u8BE5\u53D8\u91CF\u6216\u65B9\u6CD5\u662F\u9759\u6001\u53D8\u91CF\u6216\u9759\u6001\u65B9\u6CD5\u3002</p></li><li><p><strong>strictfp\uFF1A</strong> \u5E76\u4E0D\u5E38\u89C1\uFF0C\u901A\u5E38\u7528\u4E8E\u4FEE\u9970\u4E00\u4E2A\u65B9\u6CD5\uFF0C\u786E\u4FDD\u65B9\u6CD5\u4F53\u5185\u7684\u6D6E\u70B9\u6570\u8FD0\u7B97\u5728\u6BCF\u4E2A\u5E73\u53F0\u4E0A\u6267\u884C\u7684\u7ED3\u679C\u76F8\u540C\u3002</p></li><li><p><strong>super\uFF1A</strong> \u53EF\u7528\u4E8E\u8C03\u7528\u7236\u7C7B\u7684\u65B9\u6CD5\u6216\u8005\u5B57\u6BB5\u3002</p></li><li><p><strong>switch\uFF1A</strong> \u901A\u5E38\u7528\u4E8E\u4E09\u4E2A\uFF08\u4EE5\u4E0A\uFF09\u7684\u6761\u4EF6\u5224\u65AD\u3002</p></li><li><p><strong>synchronized\uFF1A</strong> \u7528\u4E8E\u6307\u5B9A\u591A\u7EBF\u7A0B\u4EE3\u7801\u4E2D\u7684\u540C\u6B65\u65B9\u6CD5\u3001\u53D8\u91CF\u6216\u8005\u4EE3\u7801\u5757\u3002</p></li><li><p><strong>this\uFF1A</strong> \u53EF\u7528\u4E8E\u5728\u65B9\u6CD5\u6216\u6784\u9020\u51FD\u6570\u4E2D\u5F15\u7528\u5F53\u524D\u5BF9\u8C61\u3002</p></li><li><p><strong>throw\uFF1A</strong> \u4E3B\u52A8\u629B\u51FA\u5F02\u5E38\u3002</p></li><li><p><strong>throws\uFF1A</strong> \u7528\u4E8E\u58F0\u660E\u5F02\u5E38\u3002</p></li><li><p><strong>transient\uFF1A</strong> \u4FEE\u9970\u7684\u5B57\u6BB5\u4E0D\u4F1A\u88AB\u5E8F\u5217\u5316\u3002</p></li><li><p><strong>try\uFF1A</strong> \u4E8E\u5305\u88F9\u8981\u6355\u83B7\u5F02\u5E38\u7684\u4EE3\u7801\u5757\u3002</p></li><li><p><strong>void\uFF1A</strong> \u7528\u4E8E\u6307\u5B9A\u65B9\u6CD5\u6CA1\u6709\u8FD4\u56DE\u503C\u3002</p></li><li><p><strong>volatile\uFF1A</strong> \u4FDD\u8BC1\u4E0D\u540C\u7EBF\u7A0B\u5BF9\u5B83\u4FEE\u9970\u7684\u53D8\u91CF\u8FDB\u884C\u64CD\u4F5C\u65F6\u7684\u53EF\u89C1\u6027\uFF0C\u5373\u4E00\u4E2A\u7EBF\u7A0B\u4FEE\u6539\u4E86\u67D0\u4E2A\u53D8\u91CF\u7684\u503C\uFF0C\u65B0\u503C\u5BF9\u5176\u4ED6\u7EBF\u7A0B\u6765\u8BF4\u662F\u7ACB\u5373\u53EF\u89C1\u7684\u3002</p></li><li><p><strong>while\uFF1A</strong> \u5982\u679C\u5FAA\u73AF\u6B21\u6570\u4E0D\u56FA\u5B9A\uFF0C\u5EFA\u8BAE\u4F7F\u7528 while \u5FAA\u73AF\u3002</p></li>",41),x=t("p",null,"\u201C\u597D\u4E86\uFF0C\u4E09\u59B9\uFF0C\u5173\u4E8E Java \u4E2D\u7684\u5173\u952E\u5B57\u5C31\u5148\u8BF4\u8FD9 48 \u4E2A\u5427\uFF0C\u8FD9\u53EA\u662F\u4E00\u4E2A\u5927\u6982\u7684\u4ECB\u7ECD\uFF0C\u540E\u9762\u8FD8\u4F1A\u5BF9\u4E00\u4E9B\u7279\u6B8A\u7684\u5173\u952E\u5B57\u5355\u72EC\u62CE\u51FA\u6765\u8BE6\u7EC6\u5730\u8BB2\uFF0C\u6BD4\u5982\u8BF4\u91CD\u8981\u7684 static\u3001final \u7B49\u3002\u201D\u8F6C\u52A8\u4E86\u4E00\u4E0B\u50F5\u786C\u7684\u8116\u5B50\u540E\uFF0C\u6211\u5BF9\u4E09\u59B9\u8BF4\u3002",-1),y=t("p",null,"\u201C\u4E8C\u54E5\uFF0C\u4F60\u8F9B\u82E6\u4E86\uFF0C\u8DB3\u8DB3 48 \u4E2A\u554A\uFF0C\u5BB9\u6211\u597D\u597D\u6D88\u5316\u4E00\u4E0B\u3002\u201D",-1),k=t("p",null,[t("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png",alt:""})],-1);function J(j,N){const s=l("ExternalLinkIcon");return r(),p("div",null,[a,c,d,_,t("ol",null,[h,t("li",null,[t("p",null,[u,f,t("a",m,[v,e(s)]),b])]),w]),x,y,k])}var E=i(g,[["render",J],["__file","48-keywords.html.vue"]]);export{E as default};
+import{_ as i}from"./plugin-vue_export-helper.21dcd24c.js";import{r as l,o as r,c as p,a as t,b as e,d as o,e as n}from"./app.615e41d8.js";const g={},a=t("h1",{id:"java\u4E2D\u5E38\u7528\u768448\u4E2A\u5173\u952E\u5B57",tabindex:"-1"},[t("a",{class:"header-anchor",href:"#java\u4E2D\u5E38\u7528\u768448\u4E2A\u5173\u952E\u5B57","aria-hidden":"true"},"#"),o(" Java\u4E2D\u5E38\u7528\u768448\u4E2A\u5173\u952E\u5B57")],-1),c=t("p",null,"\u201C\u4E8C\u54E5\uFF0C\u5C31\u6211\u4E4B\u524D\u5B66\u8FC7\u7684\u8FD9\u4E9B Java \u4EE3\u7801\u4E2D\uFF0C\u6709 public\u3001static\u3001void\u3001main \u7B49\u7B49\uFF0C\u5B83\u4EEC\u5E94\u8BE5\u90FD\u662F\u5173\u952E\u5B57\u5427\uFF1F\u201D\u4E09\u59B9\u7684\u8138\u4E0A\u6CDB\u7740\u751C\u751C\u7684\u7B11\u5BB9\uFF0C\u6211\u60F3\u5979\u5728\u5B66\u4E60 Java \u65B9\u9762\u5DF2\u7ECF\u53D8\u5F97\u8D8A\u6765\u8D8A\u81EA\u4FE1\u4E86\u3002",-1),d=t("p",null,"\u201C\u662F\u7684\uFF0C\u4E09\u59B9\u3002Java \u4E2D\u7684\u5173\u952E\u5B57\u53EF\u4E0D\u5C11\u5462\uFF01\u4F60\u4E00\u4E0B\u5B50\u53EF\u80FD\u8BB0\u4E0D\u4E86\u90A3\u4E48\u591A\uFF0C\u4E0D\u8FC7\uFF0C\u5148\u4FDD\u7559\u4E2A\u5370\u8C61\u5427\uFF0C\u5BF9\u4EE5\u540E\u7684\u5B66\u4E60\u4F1A\u5F88\u6709\u5E2E\u52A9\u3002\u201D",-1),_=t("p",null,"PS\uFF1A\u6309\u7167\u9996\u5B57\u6BCD\u7684\u81EA\u7136\u987A\u5E8F\u6392\u5217\u3002",-1),h=n("<li><p><strong>abstract\uFF1A</strong> \u7528\u4E8E\u58F0\u660E\u62BD\u8C61\u7C7B\uFF0C\u4EE5\u53CA\u62BD\u8C61\u65B9\u6CD5\u3002</p></li><li><p><strong>boolean\uFF1A</strong> \u7528\u4E8E\u5C06\u53D8\u91CF\u58F0\u660E\u4E3A\u5E03\u5C14\u503C\u7C7B\u578B\uFF0C\u53EA\u6709 true \u548C false \u4E24\u4E2A\u503C\u3002</p></li><li><p><strong>break\uFF1A</strong> \u7528\u4E8E\u4E2D\u65AD\u5FAA\u73AF\u6216 switch \u8BED\u53E5\u3002</p></li><li><p><strong>byte\uFF1A</strong> \u7528\u4E8E\u58F0\u660E\u4E00\u4E2A\u53EF\u4EE5\u5BB9\u7EB3 8 \u4E2A\u6BD4\u7279\u7684\u53D8\u91CF\u3002</p></li><li><p><strong>case\uFF1A</strong> \u7528\u4E8E\u5728 switch \u8BED\u53E5\u4E2D\u6807\u8BB0\u6761\u4EF6\u7684\u503C\u3002</p></li><li><p><strong>catch\uFF1A</strong> \u7528\u4E8E\u6355\u83B7 try \u8BED\u53E5\u4E2D\u7684\u5F02\u5E38\u3002</p></li>",6),u=t("strong",null,"char\uFF1A",-1),f=o(" \u7528\u4E8E\u58F0\u660E\u4E00\u4E2A\u53EF\u4EE5\u5BB9\u7EB3\u65E0\u7B26\u53F7 16 \u4F4D\u6BD4\u7279\u7684 "),m={href:"https://mp.weixin.qq.com/s/pNQjlXOivIgO3pbYc0GnpA",target:"_blank",rel:"noopener noreferrer"},v=o("Unicode \u5B57\u7B26"),b=o("\u7684\u53D8\u91CF\u3002"),w=n("<li><p><strong>class\uFF1A</strong> \u7528\u4E8E\u58F0\u660E\u4E00\u4E2A\u7C7B\u3002</p></li><li><p><strong>continue\uFF1A</strong> \u7528\u4E8E\u7EE7\u7EED\u4E0B\u4E00\u4E2A\u5FAA\u73AF\uFF0C\u53EF\u4EE5\u5728\u6307\u5B9A\u6761\u4EF6\u4E0B\u8DF3\u8FC7\u5176\u4F59\u4EE3\u7801\u3002</p></li><li><p><strong>default\uFF1A</strong> \u7528\u4E8E\u6307\u5B9A switch \u8BED\u53E5\u4E2D\u9664\u53BB case \u6761\u4EF6\u4E4B\u5916\u7684\u9ED8\u8BA4\u4EE3\u7801\u5757\u3002</p></li><li><p><strong>do\uFF1A</strong> \u901A\u5E38\u548C while \u5173\u952E\u5B57\u914D\u5408\u4F7F\u7528\uFF0Cdo \u540E\u7D27\u8DDF\u5FAA\u73AF\u4F53\u3002</p></li><li><p><strong>double\uFF1A</strong> \u7528\u4E8E\u58F0\u660E\u4E00\u4E2A\u53EF\u4EE5\u5BB9\u7EB3 64 \u4F4D\u6D6E\u70B9\u6570\u7684\u53D8\u91CF\u3002</p></li><li><p><strong>else\uFF1A</strong> \u7528\u4E8E\u6307\u793A if \u8BED\u53E5\u4E2D\u7684\u5907\u7528\u5206\u652F\u3002</p></li><li><p><strong>enum\uFF1A</strong> \u7528\u4E8E\u5B9A\u4E49\u4E00\u7EC4\u56FA\u5B9A\u7684\u5E38\u91CF\uFF08\u679A\u4E3E\uFF09\u3002</p></li><li><p><strong>extends\uFF1A</strong> \u7528\u4E8E\u6307\u793A\u4E00\u4E2A\u7C7B\u662F\u4ECE\u53E6\u4E00\u4E2A\u7C7B\u6216\u63A5\u53E3\u7EE7\u627F\u7684\u3002</p></li><li><p><strong>final\uFF1A</strong> \u7528\u4E8E\u6307\u793A\u8BE5\u53D8\u91CF\u662F\u4E0D\u53EF\u66F4\u6539\u7684\u3002</p></li><li><p><strong>finally\uFF1A</strong> \u548C <code>try-catch</code> \u914D\u5408\u4F7F\u7528\uFF0C\u8868\u793A\u65E0\u8BBA\u662F\u5426\u5904\u7406\u5F02\u5E38\uFF0C\u603B\u662F\u6267\u884C finally \u5757\u4E2D\u7684\u4EE3\u7801\u3002</p></li><li><p><strong>float\uFF1A</strong> \u7528\u4E8E\u58F0\u660E\u4E00\u4E2A\u53EF\u4EE5\u5BB9\u7EB3 32 \u4F4D\u6D6E\u70B9\u6570\u7684\u53D8\u91CF\u3002</p></li><li><p><strong>for\uFF1A</strong> \u7528\u4E8E\u58F0\u660E\u4E00\u4E2A for \u5FAA\u73AF\uFF0C\u5982\u679C\u5FAA\u73AF\u6B21\u6570\u662F\u56FA\u5B9A\u7684\uFF0C\u5EFA\u8BAE\u4F7F\u7528 for \u5FAA\u73AF\u3002</p></li><li><p><strong>if\uFF1A</strong> \u7528\u4E8E\u6307\u5B9A\u6761\u4EF6\uFF0C\u5982\u679C\u6761\u4EF6\u4E3A\u771F\uFF0C\u5219\u6267\u884C\u5BF9\u5E94\u4EE3\u7801\u3002</p></li><li><p><strong>implements\uFF1A</strong> \u7528\u4E8E\u5B9E\u73B0\u63A5\u53E3\u3002</p></li><li><p><strong>import\uFF1A</strong> \u7528\u4E8E\u5BFC\u5165\u5BF9\u5E94\u7684\u7C7B\u6216\u8005\u63A5\u53E3\u3002</p></li><li><p><strong>instanceof\uFF1A</strong> \u7528\u4E8E\u5224\u65AD\u5BF9\u8C61\u662F\u5426\u5C5E\u4E8E\u67D0\u4E2A\u7C7B\u578B\uFF08class\uFF09\u3002</p></li><li><p><strong>int\uFF1A</strong> \u7528\u4E8E\u58F0\u660E\u4E00\u4E2A\u53EF\u4EE5\u5BB9\u7EB3 32 \u4F4D\u5E26\u7B26\u53F7\u7684\u6574\u6570\u53D8\u91CF\u3002</p></li><li><p><strong>interface\uFF1A</strong> \u7528\u4E8E\u58F0\u660E\u63A5\u53E3\u3002</p></li><li><p><strong>long\uFF1A</strong> \u7528\u4E8E\u58F0\u660E\u4E00\u4E2A\u53EF\u4EE5\u5BB9\u7EB3 64 \u4F4D\u6574\u6570\u7684\u53D8\u91CF\u3002</p></li><li><p><strong>native\uFF1A</strong> \u7528\u4E8E\u6307\u5B9A\u4E00\u4E2A\u65B9\u6CD5\u662F\u901A\u8FC7\u8C03\u7528\u672C\u673A\u63A5\u53E3\uFF08\u975E Java\uFF09\u5B9E\u73B0\u7684\u3002</p></li><li><p><strong>new\uFF1A</strong> \u7528\u4E8E\u521B\u5EFA\u4E00\u4E2A\u65B0\u7684\u5BF9\u8C61\u3002</p></li><li><p><strong>null\uFF1A</strong> \u5982\u679C\u4E00\u4E2A\u53D8\u91CF\u662F\u7A7A\u7684\uFF08\u4EC0\u4E48\u5F15\u7528\u4E5F\u6CA1\u6709\u6307\u5411\uFF09\uFF0C\u5C31\u53EF\u4EE5\u5C06\u5B83\u8D4B\u503C\u4E3A null\uFF0C\u548C\u7A7A\u6307\u9488\u5F02\u5E38\u606F\u606F\u76F8\u5173\u3002</p></li><li><p><strong>package\uFF1A</strong> \u7528\u4E8E\u58F0\u660E\u7C7B\u6240\u5728\u7684\u5305\u3002</p></li><li><p><strong>private\uFF1A</strong> \u4E00\u4E2A\u8BBF\u95EE\u6743\u9650\u4FEE\u9970\u7B26\uFF0C\u8868\u793A\u65B9\u6CD5\u6216\u53D8\u91CF\u53EA\u5BF9\u5F53\u524D\u7C7B\u53EF\u89C1\u3002</p></li><li><p><strong>protected\uFF1A</strong> \u4E00\u4E2A\u8BBF\u95EE\u6743\u9650\u4FEE\u9970\u7B26\uFF0C\u8868\u793A\u65B9\u6CD5\u6216\u53D8\u91CF\u5BF9\u540C\u4E00\u5305\u5185\u7684\u7C7B\u548C\u6240\u6709\u5B50\u7C7B\u53EF\u89C1\u3002</p></li><li><p><strong>public\uFF1A</strong> \u4E00\u4E2A\u8BBF\u95EE\u6743\u9650\u4FEE\u9970\u7B26\uFF0C\u9664\u4E86\u53EF\u4EE5\u58F0\u660E\u65B9\u6CD5\u548C\u53D8\u91CF\uFF08\u6240\u6709\u7C7B\u53EF\u89C1\uFF09\uFF0C\u8FD8\u53EF\u4EE5\u58F0\u660E\u7C7B\u3002<code>main()</code> \u65B9\u6CD5\u5FC5\u987B\u58F0\u660E\u4E3A public\u3002</p></li><li><p><strong>return\uFF1A</strong> \u7528\u4E8E\u5728\u4EE3\u7801\u6267\u884C\u5B8C\u6210\u540E\u8FD4\u56DE\uFF08\u4E00\u4E2A\u503C\uFF09\u3002</p></li><li><p><strong>short\uFF1A</strong> \u7528\u4E8E\u58F0\u660E\u4E00\u4E2A\u53EF\u4EE5\u5BB9\u7EB3 16 \u4F4D\u6574\u6570\u7684\u53D8\u91CF\u3002</p></li><li><p><strong>static\uFF1A</strong> \u8868\u793A\u8BE5\u53D8\u91CF\u6216\u65B9\u6CD5\u662F\u9759\u6001\u53D8\u91CF\u6216\u9759\u6001\u65B9\u6CD5\u3002</p></li><li><p><strong>strictfp\uFF1A</strong> \u5E76\u4E0D\u5E38\u89C1\uFF0C\u901A\u5E38\u7528\u4E8E\u4FEE\u9970\u4E00\u4E2A\u65B9\u6CD5\uFF0C\u786E\u4FDD\u65B9\u6CD5\u4F53\u5185\u7684\u6D6E\u70B9\u6570\u8FD0\u7B97\u5728\u6BCF\u4E2A\u5E73\u53F0\u4E0A\u6267\u884C\u7684\u7ED3\u679C\u76F8\u540C\u3002</p></li><li><p><strong>super\uFF1A</strong> \u53EF\u7528\u4E8E\u8C03\u7528\u7236\u7C7B\u7684\u65B9\u6CD5\u6216\u8005\u5B57\u6BB5\u3002</p></li><li><p><strong>switch\uFF1A</strong> \u901A\u5E38\u7528\u4E8E\u4E09\u4E2A\uFF08\u4EE5\u4E0A\uFF09\u7684\u6761\u4EF6\u5224\u65AD\u3002</p></li><li><p><strong>synchronized\uFF1A</strong> \u7528\u4E8E\u6307\u5B9A\u591A\u7EBF\u7A0B\u4EE3\u7801\u4E2D\u7684\u540C\u6B65\u65B9\u6CD5\u3001\u53D8\u91CF\u6216\u8005\u4EE3\u7801\u5757\u3002</p></li><li><p><strong>this\uFF1A</strong> \u53EF\u7528\u4E8E\u5728\u65B9\u6CD5\u6216\u6784\u9020\u51FD\u6570\u4E2D\u5F15\u7528\u5F53\u524D\u5BF9\u8C61\u3002</p></li><li><p><strong>throw\uFF1A</strong> \u4E3B\u52A8\u629B\u51FA\u5F02\u5E38\u3002</p></li><li><p><strong>throws\uFF1A</strong> \u7528\u4E8E\u58F0\u660E\u5F02\u5E38\u3002</p></li><li><p><strong>transient\uFF1A</strong> \u4FEE\u9970\u7684\u5B57\u6BB5\u4E0D\u4F1A\u88AB\u5E8F\u5217\u5316\u3002</p></li><li><p><strong>try\uFF1A</strong> \u4E8E\u5305\u88F9\u8981\u6355\u83B7\u5F02\u5E38\u7684\u4EE3\u7801\u5757\u3002</p></li><li><p><strong>void\uFF1A</strong> \u7528\u4E8E\u6307\u5B9A\u65B9\u6CD5\u6CA1\u6709\u8FD4\u56DE\u503C\u3002</p></li><li><p><strong>volatile\uFF1A</strong> \u4FDD\u8BC1\u4E0D\u540C\u7EBF\u7A0B\u5BF9\u5B83\u4FEE\u9970\u7684\u53D8\u91CF\u8FDB\u884C\u64CD\u4F5C\u65F6\u7684\u53EF\u89C1\u6027\uFF0C\u5373\u4E00\u4E2A\u7EBF\u7A0B\u4FEE\u6539\u4E86\u67D0\u4E2A\u53D8\u91CF\u7684\u503C\uFF0C\u65B0\u503C\u5BF9\u5176\u4ED6\u7EBF\u7A0B\u6765\u8BF4\u662F\u7ACB\u5373\u53EF\u89C1\u7684\u3002</p></li><li><p><strong>while\uFF1A</strong> \u5982\u679C\u5FAA\u73AF\u6B21\u6570\u4E0D\u56FA\u5B9A\uFF0C\u5EFA\u8BAE\u4F7F\u7528 while \u5FAA\u73AF\u3002</p></li>",41),x=t("p",null,"\u201C\u597D\u4E86\uFF0C\u4E09\u59B9\uFF0C\u5173\u4E8E Java \u4E2D\u7684\u5173\u952E\u5B57\u5C31\u5148\u8BF4\u8FD9 48 \u4E2A\u5427\uFF0C\u8FD9\u53EA\u662F\u4E00\u4E2A\u5927\u6982\u7684\u4ECB\u7ECD\uFF0C\u540E\u9762\u8FD8\u4F1A\u5BF9\u4E00\u4E9B\u7279\u6B8A\u7684\u5173\u952E\u5B57\u5355\u72EC\u62CE\u51FA\u6765\u8BE6\u7EC6\u5730\u8BB2\uFF0C\u6BD4\u5982\u8BF4\u91CD\u8981\u7684 static\u3001final \u7B49\u3002\u201D\u8F6C\u52A8\u4E86\u4E00\u4E0B\u50F5\u786C\u7684\u8116\u5B50\u540E\uFF0C\u6211\u5BF9\u4E09\u59B9\u8BF4\u3002",-1),y=t("p",null,"\u201C\u4E8C\u54E5\uFF0C\u4F60\u8F9B\u82E6\u4E86\uFF0C\u8DB3\u8DB3 48 \u4E2A\u554A\uFF0C\u5BB9\u6211\u597D\u597D\u6D88\u5316\u4E00\u4E0B\u3002\u201D",-1),k=t("p",null,[t("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png",alt:""})],-1);function J(j,N){const s=l("ExternalLinkIcon");return r(),p("div",null,[a,c,d,_,t("ol",null,[h,t("li",null,[t("p",null,[u,f,t("a",m,[v,e(s)]),b])]),w]),x,y,k])}var E=i(g,[["render",J],["__file","48-keywords.html.vue"]]);export{E as default};
diff --git a/dist/assets/BIONIOAIO.html.27d4fa22.js b/dist/assets/BIONIOAIO.html.4c184e72.js
similarity index 99%
rename from dist/assets/BIONIOAIO.html.27d4fa22.js
rename to dist/assets/BIONIOAIO.html.4c184e72.js
index 4c671d45..d79c3a8f 100644
--- a/dist/assets/BIONIOAIO.html.27d4fa22.js
+++ b/dist/assets/BIONIOAIO.html.4c184e72.js
@@ -1,4 +1,4 @@
-import{_ as t}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o as e,c as o,a as n,b as c,e as l,d as s}from"./app.a0271b9c.js";const i={},u=l(`<h1 id="\u5982\u4F55\u7ED9\u5973\u670B\u53CB\u89E3\u91CA\u6E05\u695Abio\u3001nio\u548Caio" tabindex="-1"><a class="header-anchor" href="#\u5982\u4F55\u7ED9\u5973\u670B\u53CB\u89E3\u91CA\u6E05\u695Abio\u3001nio\u548Caio" aria-hidden="true">#</a> \u5982\u4F55\u7ED9\u5973\u670B\u53CB\u89E3\u91CA\u6E05\u695ABIO\u3001NIO\u548CAIO\uFF1F</h1><p>\u5468\u672B\u5348\u540E\uFF0C\u5728\u5BB6\u91CC\u9762\u8FDB\u884C\u7535\u8BDD\u9762\u8BD5\uFF0C\u6211\u95EE\u4E86\u9762\u8BD5\u8005\u51E0\u4E2A\u5173\u4E8E IO \u7684\u95EE\u9898\uFF0C\u5176\u4E2D\u5305\u62EC\u4EC0\u4E48\u662F BIO\u3001NIO \u548C AIO\uFF1F\u4E09\u8005\u6709\u4EC0\u4E48\u533A\u522B\uFF1F\u5177\u4F53\u5982\u4F55\u4F7F\u7528\u7B49\u95EE\u9898\uFF0C\u4F46\u662F\u9762\u8BD5\u8005\u56DE\u7B54\u7684\u5E76\u4E0D\u662F\u5F88\u6EE1\u610F\u3002\u4E8E\u662F\u6211\u5728\u9762\u8BD5\u8BC4\u4EF7\u4E2D\u5199\u9053\uFF1A&quot;\u5BF9 Java \u7684 IO \u63D0\u9192\u7406\u89E3\u4E0D\u591F\u6DF1\u5165&quot;\u3002\u6070\u597D\u88AB\u5973\u670B\u53CB\u770B\u5230\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-1.jpg" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-2.jpg" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-3.gif" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-4.jpg" alt=""></p><p>Java IO</p><p>IO\uFF0C\u5E38\u534F\u4F5C I/O\uFF0C\u662F Input/Output \u7684\u7B80\u79F0\uFF0C\u5373\u8F93\u5165/\u8F93\u51FA\u3002\u901A\u5E38\u6307\u6570\u636E\u5728\u5185\u90E8\u5B58\u50A8\u5668\uFF08\u5185\u5B58\uFF09\u548C\u5916\u90E8\u5B58\u50A8\u5668\uFF08\u786C\u76D8\u3001\u4F18\u76D8\u7B49\uFF09\u6216\u5176\u4ED6\u5468\u8FB9\u8BBE\u5907\u4E4B\u95F4\u7684\u8F93\u5165\u548C\u8F93\u51FA\u3002</p><p>\u8F93\u5165/\u8F93\u51FA\u662F\u4FE1\u606F\u5904\u7406\u7CFB\u7EDF\uFF08\u4F8B\u5982\u8BA1\u7B97\u673A\uFF09\u4E0E\u5916\u90E8\u4E16\u754C\uFF08\u53EF\u80FD\u662F\u4EBA\u7C7B\u6216\u53E6\u4E00\u4FE1\u606F\u5904\u7406\u7CFB\u7EDF\uFF09\u4E4B\u95F4\u7684\u901A\u4FE1\u3002</p><p>\u8F93\u5165\u662F\u7CFB\u7EDF\u63A5\u6536\u7684\u4FE1\u53F7\u6216\u6570\u636E\uFF0C\u8F93\u51FA\u5219\u662F\u4ECE\u5176\u53D1\u9001\u7684\u4FE1\u53F7\u6216\u6570\u636E\u3002</p><p>\u5728 Java \u4E2D\uFF0C\u63D0\u4F9B\u4E86\u4E00\u7CFB\u5217 API\uFF0C\u53EF\u4EE5\u4F9B\u5F00\u53D1\u8005\u6765\u8BFB\u5199\u5916\u90E8\u6570\u636E\u6216\u6587\u4EF6\u3002\u6211\u4EEC\u79F0\u8FD9\u4E9B API \u4E3A Java IO\u3002</p><p>IO \u662F Java \u4E2D\u6BD4\u8F83\u91CD\u8981\uFF0C\u4E14\u6BD4\u8F83\u96BE\u7684\u77E5\u8BC6\u70B9\uFF0C\u4E3B\u8981\u662F\u56E0\u4E3A\u968F\u7740 Java \u7684\u53D1\u5C55\uFF0C\u76EE\u524D\u6709\u4E09\u79CD IO \u5171\u5B58\u3002\u5206\u522B\u662F BIO\u3001NIO \u548C AIO\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-5.jpg" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-6.gif" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-7.gif" alt=""></p><p>Java BIO</p><p>BIO \u5168\u79F0Block-IO \u662F\u4E00\u79CD<strong>\u540C\u6B65\u4E14\u963B\u585E</strong>\u7684\u901A\u4FE1\u6A21\u5F0F\u3002\u662F\u4E00\u4E2A\u6BD4\u8F83\u4F20\u7EDF\u7684\u901A\u4FE1\u65B9\u5F0F\uFF0C\u6A21\u5F0F\u7B80\u5355\uFF0C\u4F7F\u7528\u65B9\u4FBF\u3002\u4F46\u5E76\u53D1\u5904\u7406\u80FD\u529B\u4F4E\uFF0C\u901A\u4FE1\u8017\u65F6\uFF0C\u4F9D\u8D56\u7F51\u901F\u3002</p><p>Java NIO</p><p>Java NIO\uFF0C\u5168\u7A0B Non-Block IO \uFF0C\u662F Java SE 1.4 \u7248\u4EE5\u540E\uFF0C\u9488\u5BF9\u7F51\u7EDC\u4F20\u8F93\u6548\u80FD\u4F18\u5316\u7684\u65B0\u529F\u80FD\u3002\u662F\u4E00\u79CD<strong>\u975E\u963B\u585E\u540C\u6B65</strong>\u7684\u901A\u4FE1\u6A21\u5F0F\u3002</p><p>NIO \u4E0E\u539F\u6765\u7684 I/O \u6709\u540C\u6837\u7684\u4F5C\u7528\u548C\u76EE\u7684, \u4ED6\u4EEC\u4E4B\u95F4\u6700\u91CD\u8981\u7684\u533A\u522B\u662F\u6570\u636E\u6253\u5305\u548C\u4F20\u8F93\u7684\u65B9\u5F0F\u3002\u539F\u6765\u7684 I/O \u4EE5\u6D41\u7684\u65B9\u5F0F\u5904\u7406\u6570\u636E\uFF0C\u800C NIO \u4EE5\u5757\u7684\u65B9\u5F0F\u5904\u7406\u6570\u636E\u3002</p><p>\u9762\u5411\u6D41\u7684 I/O \u7CFB\u7EDF\u4E00\u6B21\u4E00\u4E2A\u5B57\u8282\u5730\u5904\u7406\u6570\u636E\u3002\u4E00\u4E2A\u8F93\u5165\u6D41\u4EA7\u751F\u4E00\u4E2A\u5B57\u8282\u7684\u6570\u636E\uFF0C\u4E00\u4E2A\u8F93\u51FA\u6D41\u6D88\u8D39\u4E00\u4E2A\u5B57\u8282\u7684\u6570\u636E\u3002</p><p>\u9762\u5411\u5757\u7684 I/O \u7CFB\u7EDF\u4EE5\u5757\u7684\u5F62\u5F0F\u5904\u7406\u6570\u636E\u3002\u6BCF\u4E00\u4E2A\u64CD\u4F5C\u90FD\u5728\u4E00\u6B65\u4E2D\u4EA7\u751F\u6216\u8005\u6D88\u8D39\u4E00\u4E2A\u6570\u636E\u5757\u3002\u6309\u5757\u5904\u7406\u6570\u636E\u6BD4\u6309(\u6D41\u5F0F\u7684)\u5B57\u8282\u5904\u7406\u6570\u636E\u8981\u5FEB\u5F97\u591A\u3002\u4F46\u662F\u9762\u5411\u5757\u7684 I/O \u7F3A\u5C11\u4E00\u4E9B\u9762\u5411\u6D41\u7684 I/O \u6240\u5177\u6709\u7684\u4F18\u96C5\u6027\u548C\u7B80\u5355\u6027\u3002</p><p>Java AIO</p><p>Java AIO\uFF0C\u5168\u7A0B Asynchronous IO\uFF0C\u662F<strong>\u5F02\u6B65\u975E\u963B\u585E</strong>\u7684 IO\u3002\u662F\u4E00\u79CD\u975E\u963B\u585E\u5F02\u6B65\u7684\u901A\u4FE1\u6A21\u5F0F\u3002</p><p>\u5728 NIO \u7684\u57FA\u7840\u4E0A\u5F15\u5165\u4E86\u65B0\u7684\u5F02\u6B65\u901A\u9053\u7684\u6982\u5FF5\uFF0C\u5E76\u63D0\u4F9B\u4E86\u5F02\u6B65\u6587\u4EF6\u901A\u9053\u548C\u5F02\u6B65\u5957\u63A5\u5B57\u901A\u9053\u7684\u5B9E\u73B0\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-8.jpg" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-9.jpg" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-10.jpg" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-11.gif" alt=""></p><p>\u4E09\u79CD IO \u7684\u533A\u522B</p><p>\u9996\u5148\uFF0C\u6211\u4EEC\u7AD9\u5728\u5B8F\u89C2\u7684\u89D2\u5EA6\uFF0C\u91CD\u65B0\u753B\u4E00\u4E0B\u91CD\u70B9\uFF1A</p><p><strong>BIO \uFF08Blocking I/O\uFF09\uFF1A\u540C\u6B65\u963B\u585E I/O \u6A21\u5F0F\u3002</strong></p><p><strong>NIO \uFF08New I/O\uFF09\uFF1A\u540C\u6B65\u975E\u963B\u585E\u6A21\u5F0F\u3002</strong></p><p><strong>AIO \uFF08Asynchronous I/O\uFF09\uFF1A\u5F02\u6B65\u975E\u963B\u585E I/O \u6A21\u578B\u3002</strong></p><p>\u540C\u6B65\u963B\u585E\u6A21\u5F0F\uFF1A\u8FD9\u79CD\u6A21\u5F0F\u4E0B\uFF0C\u6211\u4EEC\u7684\u5DE5\u4F5C\u6A21\u5F0F\u662F\u5148\u6765\u5230\u53A8\u623F\uFF0C\u5F00\u59CB\u70E7\u6C34\uFF0C\u5E76\u5750\u5728\u6C34\u58F6\u9762\u524D\u4E00\u76F4\u7B49\u7740\u6C34\u70E7\u5F00\u3002</p><p>\u540C\u6B65\u975E\u963B\u585E\u6A21\u5F0F\uFF1A\u8FD9\u79CD\u6A21\u5F0F\u4E0B\uFF0C\u6211\u4EEC\u7684\u5DE5\u4F5C\u6A21\u5F0F\u662F\u5148\u6765\u5230\u53A8\u623F\uFF0C\u5F00\u59CB\u70E7\u6C34\uFF0C\u4F46\u662F\u6211\u4EEC\u4E0D\u4E00\u76F4\u5750\u5728\u6C34\u58F6\u524D\u9762\u7B49\uFF0C\u800C\u662F\u56DE\u5230\u5BA2\u5385\u770B\u7535\u89C6\uFF0C\u7136\u540E\u6BCF\u9694\u51E0\u5206\u949F\u5230\u53A8\u623F\u770B\u4E00\u4E0B\u6C34\u6709\u6CA1\u6709\u70E7\u5F00\u3002</p><p>\u5F02\u6B65\u975E\u963B\u585E I/O \u6A21\u578B\uFF1A\u8FD9\u79CD\u6A21\u5F0F\u4E0B\uFF0C\u6211\u4EEC\u7684\u5DE5\u4F5C\u6A21\u5F0F\u662F\u5148\u6765\u5230\u53A8\u623F\uFF0C\u5F00\u59CB\u70E7\u6C34\uFF0C\u6211\u4EEC\u4E0D\u4E00\u76F4\u5750\u5728\u6C34\u58F6\u524D\u9762\u7B49\uFF0C\u4E5F\u4E0D\u9694\u4E00\u6BB5\u65F6\u95F4\u53BB\u770B\u4E00\u4E0B\uFF0C\u800C\u662F\u5728\u5BA2\u5385\u770B\u7535\u89C6\uFF0C\u6C34\u58F6\u4E0A\u9762\u6709\u4E2A\u5F00\u5173\uFF0C\u6C34\u70E7\u5F00\u4E4B\u540E\u4ED6\u4F1A\u901A\u77E5\u6211\u3002</p><p>\u963B\u585E VS \u975E\u963B\u585E\uFF1A\u4EBA\u662F\u5426\u5750\u5728\u6C34\u58F6\u524D\u9762\u4E00\u76F4\u7B49\u3002</p><p>\u540C\u6B65 VS \u5F02\u6B65\uFF1A\u6C34\u58F6\u662F\u4E0D\u662F\u5728\u6C34\u70E7\u5F00\u4E4B\u540E\u4E3B\u52A8\u901A\u77E5\u4EBA\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-12.gif" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-13.jpg" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-14.jpg" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-15.jpg" alt=""></p><p>\u9002\u7528\u573A\u666F</p><p>BIO \u65B9\u5F0F\u9002\u7528\u4E8E\u8FDE\u63A5\u6570\u76EE\u6BD4\u8F83\u5C0F\u4E14\u56FA\u5B9A\u7684\u67B6\u6784\uFF0C\u8FD9\u79CD\u65B9\u5F0F\u5BF9\u670D\u52A1\u5668\u8D44\u6E90\u8981\u6C42\u6BD4\u8F83\u9AD8\uFF0C\u5E76\u53D1\u5C40\u9650\u4E8E\u5E94\u7528\u4E2D\uFF0CJDK1.4 \u4EE5\u524D\u7684\u552F\u4E00\u9009\u62E9\uFF0C\u4F46\u7A0B\u5E8F\u76F4\u89C2\u7B80\u5355\u6613\u7406\u89E3\u3002</p><p>NIO \u65B9\u5F0F\u9002\u7528\u4E8E\u8FDE\u63A5\u6570\u76EE\u591A\u4E14\u8FDE\u63A5\u6BD4\u8F83\u77ED\uFF08\u8F7B\u64CD\u4F5C\uFF09\u7684\u67B6\u6784\uFF0C\u6BD4\u5982\u804A\u5929\u670D\u52A1\u5668\uFF0C\u5E76\u53D1\u5C40\u9650\u4E8E\u5E94\u7528\u4E2D\uFF0C\u7F16\u7A0B\u6BD4\u8F83\u590D\u6742\uFF0CJDK1.4 \u5F00\u59CB\u652F\u6301\u3002</p><p>AIO \u65B9\u5F0F\u9002\u7528\u4E8E\u8FDE\u63A5\u6570\u76EE\u591A\u4E14\u8FDE\u63A5\u6BD4\u8F83\u957F\uFF08\u91CD\u64CD\u4F5C\uFF09\u7684\u67B6\u6784\uFF0C\u6BD4\u5982\u76F8\u518C\u670D\u52A1\u5668\uFF0C\u5145\u5206\u8C03\u7528 OS \u53C2\u4E0E\u5E76\u53D1\u64CD\u4F5C\uFF0C\u7F16\u7A0B\u6BD4\u8F83\u590D\u6742\uFF0CJDK7 \u5F00\u59CB\u652F\u6301\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-16.gif" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-17.gif" alt=""></p><p>\u4F7F\u7528\u65B9\u5F0F</p><p>\u4F7F\u7528 BIO \u5B9E\u73B0\u6587\u4EF6\u7684\u8BFB\u53D6\u548C\u5199\u5165\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token comment">//Initializes The Object</span>
+import{_ as t}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o as e,c as o,a as n,b as c,e as l,d as s}from"./app.615e41d8.js";const i={},u=l(`<h1 id="\u5982\u4F55\u7ED9\u5973\u670B\u53CB\u89E3\u91CA\u6E05\u695Abio\u3001nio\u548Caio" tabindex="-1"><a class="header-anchor" href="#\u5982\u4F55\u7ED9\u5973\u670B\u53CB\u89E3\u91CA\u6E05\u695Abio\u3001nio\u548Caio" aria-hidden="true">#</a> \u5982\u4F55\u7ED9\u5973\u670B\u53CB\u89E3\u91CA\u6E05\u695ABIO\u3001NIO\u548CAIO\uFF1F</h1><p>\u5468\u672B\u5348\u540E\uFF0C\u5728\u5BB6\u91CC\u9762\u8FDB\u884C\u7535\u8BDD\u9762\u8BD5\uFF0C\u6211\u95EE\u4E86\u9762\u8BD5\u8005\u51E0\u4E2A\u5173\u4E8E IO \u7684\u95EE\u9898\uFF0C\u5176\u4E2D\u5305\u62EC\u4EC0\u4E48\u662F BIO\u3001NIO \u548C AIO\uFF1F\u4E09\u8005\u6709\u4EC0\u4E48\u533A\u522B\uFF1F\u5177\u4F53\u5982\u4F55\u4F7F\u7528\u7B49\u95EE\u9898\uFF0C\u4F46\u662F\u9762\u8BD5\u8005\u56DE\u7B54\u7684\u5E76\u4E0D\u662F\u5F88\u6EE1\u610F\u3002\u4E8E\u662F\u6211\u5728\u9762\u8BD5\u8BC4\u4EF7\u4E2D\u5199\u9053\uFF1A&quot;\u5BF9 Java \u7684 IO \u63D0\u9192\u7406\u89E3\u4E0D\u591F\u6DF1\u5165&quot;\u3002\u6070\u597D\u88AB\u5973\u670B\u53CB\u770B\u5230\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-1.jpg" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-2.jpg" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-3.gif" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-4.jpg" alt=""></p><p>Java IO</p><p>IO\uFF0C\u5E38\u534F\u4F5C I/O\uFF0C\u662F Input/Output \u7684\u7B80\u79F0\uFF0C\u5373\u8F93\u5165/\u8F93\u51FA\u3002\u901A\u5E38\u6307\u6570\u636E\u5728\u5185\u90E8\u5B58\u50A8\u5668\uFF08\u5185\u5B58\uFF09\u548C\u5916\u90E8\u5B58\u50A8\u5668\uFF08\u786C\u76D8\u3001\u4F18\u76D8\u7B49\uFF09\u6216\u5176\u4ED6\u5468\u8FB9\u8BBE\u5907\u4E4B\u95F4\u7684\u8F93\u5165\u548C\u8F93\u51FA\u3002</p><p>\u8F93\u5165/\u8F93\u51FA\u662F\u4FE1\u606F\u5904\u7406\u7CFB\u7EDF\uFF08\u4F8B\u5982\u8BA1\u7B97\u673A\uFF09\u4E0E\u5916\u90E8\u4E16\u754C\uFF08\u53EF\u80FD\u662F\u4EBA\u7C7B\u6216\u53E6\u4E00\u4FE1\u606F\u5904\u7406\u7CFB\u7EDF\uFF09\u4E4B\u95F4\u7684\u901A\u4FE1\u3002</p><p>\u8F93\u5165\u662F\u7CFB\u7EDF\u63A5\u6536\u7684\u4FE1\u53F7\u6216\u6570\u636E\uFF0C\u8F93\u51FA\u5219\u662F\u4ECE\u5176\u53D1\u9001\u7684\u4FE1\u53F7\u6216\u6570\u636E\u3002</p><p>\u5728 Java \u4E2D\uFF0C\u63D0\u4F9B\u4E86\u4E00\u7CFB\u5217 API\uFF0C\u53EF\u4EE5\u4F9B\u5F00\u53D1\u8005\u6765\u8BFB\u5199\u5916\u90E8\u6570\u636E\u6216\u6587\u4EF6\u3002\u6211\u4EEC\u79F0\u8FD9\u4E9B API \u4E3A Java IO\u3002</p><p>IO \u662F Java \u4E2D\u6BD4\u8F83\u91CD\u8981\uFF0C\u4E14\u6BD4\u8F83\u96BE\u7684\u77E5\u8BC6\u70B9\uFF0C\u4E3B\u8981\u662F\u56E0\u4E3A\u968F\u7740 Java \u7684\u53D1\u5C55\uFF0C\u76EE\u524D\u6709\u4E09\u79CD IO \u5171\u5B58\u3002\u5206\u522B\u662F BIO\u3001NIO \u548C AIO\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-5.jpg" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-6.gif" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-7.gif" alt=""></p><p>Java BIO</p><p>BIO \u5168\u79F0Block-IO \u662F\u4E00\u79CD<strong>\u540C\u6B65\u4E14\u963B\u585E</strong>\u7684\u901A\u4FE1\u6A21\u5F0F\u3002\u662F\u4E00\u4E2A\u6BD4\u8F83\u4F20\u7EDF\u7684\u901A\u4FE1\u65B9\u5F0F\uFF0C\u6A21\u5F0F\u7B80\u5355\uFF0C\u4F7F\u7528\u65B9\u4FBF\u3002\u4F46\u5E76\u53D1\u5904\u7406\u80FD\u529B\u4F4E\uFF0C\u901A\u4FE1\u8017\u65F6\uFF0C\u4F9D\u8D56\u7F51\u901F\u3002</p><p>Java NIO</p><p>Java NIO\uFF0C\u5168\u7A0B Non-Block IO \uFF0C\u662F Java SE 1.4 \u7248\u4EE5\u540E\uFF0C\u9488\u5BF9\u7F51\u7EDC\u4F20\u8F93\u6548\u80FD\u4F18\u5316\u7684\u65B0\u529F\u80FD\u3002\u662F\u4E00\u79CD<strong>\u975E\u963B\u585E\u540C\u6B65</strong>\u7684\u901A\u4FE1\u6A21\u5F0F\u3002</p><p>NIO \u4E0E\u539F\u6765\u7684 I/O \u6709\u540C\u6837\u7684\u4F5C\u7528\u548C\u76EE\u7684, \u4ED6\u4EEC\u4E4B\u95F4\u6700\u91CD\u8981\u7684\u533A\u522B\u662F\u6570\u636E\u6253\u5305\u548C\u4F20\u8F93\u7684\u65B9\u5F0F\u3002\u539F\u6765\u7684 I/O \u4EE5\u6D41\u7684\u65B9\u5F0F\u5904\u7406\u6570\u636E\uFF0C\u800C NIO \u4EE5\u5757\u7684\u65B9\u5F0F\u5904\u7406\u6570\u636E\u3002</p><p>\u9762\u5411\u6D41\u7684 I/O \u7CFB\u7EDF\u4E00\u6B21\u4E00\u4E2A\u5B57\u8282\u5730\u5904\u7406\u6570\u636E\u3002\u4E00\u4E2A\u8F93\u5165\u6D41\u4EA7\u751F\u4E00\u4E2A\u5B57\u8282\u7684\u6570\u636E\uFF0C\u4E00\u4E2A\u8F93\u51FA\u6D41\u6D88\u8D39\u4E00\u4E2A\u5B57\u8282\u7684\u6570\u636E\u3002</p><p>\u9762\u5411\u5757\u7684 I/O \u7CFB\u7EDF\u4EE5\u5757\u7684\u5F62\u5F0F\u5904\u7406\u6570\u636E\u3002\u6BCF\u4E00\u4E2A\u64CD\u4F5C\u90FD\u5728\u4E00\u6B65\u4E2D\u4EA7\u751F\u6216\u8005\u6D88\u8D39\u4E00\u4E2A\u6570\u636E\u5757\u3002\u6309\u5757\u5904\u7406\u6570\u636E\u6BD4\u6309(\u6D41\u5F0F\u7684)\u5B57\u8282\u5904\u7406\u6570\u636E\u8981\u5FEB\u5F97\u591A\u3002\u4F46\u662F\u9762\u5411\u5757\u7684 I/O \u7F3A\u5C11\u4E00\u4E9B\u9762\u5411\u6D41\u7684 I/O \u6240\u5177\u6709\u7684\u4F18\u96C5\u6027\u548C\u7B80\u5355\u6027\u3002</p><p>Java AIO</p><p>Java AIO\uFF0C\u5168\u7A0B Asynchronous IO\uFF0C\u662F<strong>\u5F02\u6B65\u975E\u963B\u585E</strong>\u7684 IO\u3002\u662F\u4E00\u79CD\u975E\u963B\u585E\u5F02\u6B65\u7684\u901A\u4FE1\u6A21\u5F0F\u3002</p><p>\u5728 NIO \u7684\u57FA\u7840\u4E0A\u5F15\u5165\u4E86\u65B0\u7684\u5F02\u6B65\u901A\u9053\u7684\u6982\u5FF5\uFF0C\u5E76\u63D0\u4F9B\u4E86\u5F02\u6B65\u6587\u4EF6\u901A\u9053\u548C\u5F02\u6B65\u5957\u63A5\u5B57\u901A\u9053\u7684\u5B9E\u73B0\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-8.jpg" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-9.jpg" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-10.jpg" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-11.gif" alt=""></p><p>\u4E09\u79CD IO \u7684\u533A\u522B</p><p>\u9996\u5148\uFF0C\u6211\u4EEC\u7AD9\u5728\u5B8F\u89C2\u7684\u89D2\u5EA6\uFF0C\u91CD\u65B0\u753B\u4E00\u4E0B\u91CD\u70B9\uFF1A</p><p><strong>BIO \uFF08Blocking I/O\uFF09\uFF1A\u540C\u6B65\u963B\u585E I/O \u6A21\u5F0F\u3002</strong></p><p><strong>NIO \uFF08New I/O\uFF09\uFF1A\u540C\u6B65\u975E\u963B\u585E\u6A21\u5F0F\u3002</strong></p><p><strong>AIO \uFF08Asynchronous I/O\uFF09\uFF1A\u5F02\u6B65\u975E\u963B\u585E I/O \u6A21\u578B\u3002</strong></p><p>\u540C\u6B65\u963B\u585E\u6A21\u5F0F\uFF1A\u8FD9\u79CD\u6A21\u5F0F\u4E0B\uFF0C\u6211\u4EEC\u7684\u5DE5\u4F5C\u6A21\u5F0F\u662F\u5148\u6765\u5230\u53A8\u623F\uFF0C\u5F00\u59CB\u70E7\u6C34\uFF0C\u5E76\u5750\u5728\u6C34\u58F6\u9762\u524D\u4E00\u76F4\u7B49\u7740\u6C34\u70E7\u5F00\u3002</p><p>\u540C\u6B65\u975E\u963B\u585E\u6A21\u5F0F\uFF1A\u8FD9\u79CD\u6A21\u5F0F\u4E0B\uFF0C\u6211\u4EEC\u7684\u5DE5\u4F5C\u6A21\u5F0F\u662F\u5148\u6765\u5230\u53A8\u623F\uFF0C\u5F00\u59CB\u70E7\u6C34\uFF0C\u4F46\u662F\u6211\u4EEC\u4E0D\u4E00\u76F4\u5750\u5728\u6C34\u58F6\u524D\u9762\u7B49\uFF0C\u800C\u662F\u56DE\u5230\u5BA2\u5385\u770B\u7535\u89C6\uFF0C\u7136\u540E\u6BCF\u9694\u51E0\u5206\u949F\u5230\u53A8\u623F\u770B\u4E00\u4E0B\u6C34\u6709\u6CA1\u6709\u70E7\u5F00\u3002</p><p>\u5F02\u6B65\u975E\u963B\u585E I/O \u6A21\u578B\uFF1A\u8FD9\u79CD\u6A21\u5F0F\u4E0B\uFF0C\u6211\u4EEC\u7684\u5DE5\u4F5C\u6A21\u5F0F\u662F\u5148\u6765\u5230\u53A8\u623F\uFF0C\u5F00\u59CB\u70E7\u6C34\uFF0C\u6211\u4EEC\u4E0D\u4E00\u76F4\u5750\u5728\u6C34\u58F6\u524D\u9762\u7B49\uFF0C\u4E5F\u4E0D\u9694\u4E00\u6BB5\u65F6\u95F4\u53BB\u770B\u4E00\u4E0B\uFF0C\u800C\u662F\u5728\u5BA2\u5385\u770B\u7535\u89C6\uFF0C\u6C34\u58F6\u4E0A\u9762\u6709\u4E2A\u5F00\u5173\uFF0C\u6C34\u70E7\u5F00\u4E4B\u540E\u4ED6\u4F1A\u901A\u77E5\u6211\u3002</p><p>\u963B\u585E VS \u975E\u963B\u585E\uFF1A\u4EBA\u662F\u5426\u5750\u5728\u6C34\u58F6\u524D\u9762\u4E00\u76F4\u7B49\u3002</p><p>\u540C\u6B65 VS \u5F02\u6B65\uFF1A\u6C34\u58F6\u662F\u4E0D\u662F\u5728\u6C34\u70E7\u5F00\u4E4B\u540E\u4E3B\u52A8\u901A\u77E5\u4EBA\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-12.gif" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-13.jpg" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-14.jpg" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-15.jpg" alt=""></p><p>\u9002\u7528\u573A\u666F</p><p>BIO \u65B9\u5F0F\u9002\u7528\u4E8E\u8FDE\u63A5\u6570\u76EE\u6BD4\u8F83\u5C0F\u4E14\u56FA\u5B9A\u7684\u67B6\u6784\uFF0C\u8FD9\u79CD\u65B9\u5F0F\u5BF9\u670D\u52A1\u5668\u8D44\u6E90\u8981\u6C42\u6BD4\u8F83\u9AD8\uFF0C\u5E76\u53D1\u5C40\u9650\u4E8E\u5E94\u7528\u4E2D\uFF0CJDK1.4 \u4EE5\u524D\u7684\u552F\u4E00\u9009\u62E9\uFF0C\u4F46\u7A0B\u5E8F\u76F4\u89C2\u7B80\u5355\u6613\u7406\u89E3\u3002</p><p>NIO \u65B9\u5F0F\u9002\u7528\u4E8E\u8FDE\u63A5\u6570\u76EE\u591A\u4E14\u8FDE\u63A5\u6BD4\u8F83\u77ED\uFF08\u8F7B\u64CD\u4F5C\uFF09\u7684\u67B6\u6784\uFF0C\u6BD4\u5982\u804A\u5929\u670D\u52A1\u5668\uFF0C\u5E76\u53D1\u5C40\u9650\u4E8E\u5E94\u7528\u4E2D\uFF0C\u7F16\u7A0B\u6BD4\u8F83\u590D\u6742\uFF0CJDK1.4 \u5F00\u59CB\u652F\u6301\u3002</p><p>AIO \u65B9\u5F0F\u9002\u7528\u4E8E\u8FDE\u63A5\u6570\u76EE\u591A\u4E14\u8FDE\u63A5\u6BD4\u8F83\u957F\uFF08\u91CD\u64CD\u4F5C\uFF09\u7684\u67B6\u6784\uFF0C\u6BD4\u5982\u76F8\u518C\u670D\u52A1\u5668\uFF0C\u5145\u5206\u8C03\u7528 OS \u53C2\u4E0E\u5E76\u53D1\u64CD\u4F5C\uFF0C\u7F16\u7A0B\u6BD4\u8F83\u590D\u6742\uFF0CJDK7 \u5F00\u59CB\u652F\u6301\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-16.gif" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-17.gif" alt=""></p><p>\u4F7F\u7528\u65B9\u5F0F</p><p>\u4F7F\u7528 BIO \u5B9E\u73B0\u6587\u4EF6\u7684\u8BFB\u53D6\u548C\u5199\u5165\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token comment">//Initializes The Object</span>
 <span class="token class-name">User1</span> user <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">User1</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 user<span class="token punctuation">.</span><span class="token function">setName</span><span class="token punctuation">(</span><span class="token string">&quot;wanger&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 user<span class="token punctuation">.</span><span class="token function">setAge</span><span class="token punctuation">(</span><span class="token number">23</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
diff --git a/dist/assets/BOKEYUANruhegaoxiaodixuexijishu.html.bdd4e19a.js b/dist/assets/BOKEYUANruhegaoxiaodixuexijishu.html.665a0cbe.js
similarity index 99%
rename from dist/assets/BOKEYUANruhegaoxiaodixuexijishu.html.bdd4e19a.js
rename to dist/assets/BOKEYUANruhegaoxiaodixuexijishu.html.665a0cbe.js
index 4a2e83a3..e9da7828 100644
--- a/dist/assets/BOKEYUANruhegaoxiaodixuexijishu.html.bdd4e19a.js
+++ b/dist/assets/BOKEYUANruhegaoxiaodixuexijishu.html.665a0cbe.js
@@ -1 +1 @@
-import{_ as h}from"./plugin-vue_export-helper.21dcd24c.js";import{r as l,o as t,c as n,a as e,b as o,e as i,d as a}from"./app.a0271b9c.js";const s={},d=i('<ul><li><a href="#what">\u5B66\u4EC0\u4E48</a></li><li><a href="#base">\u57FA\u7840\u4E0E\u5E94\u7528</a></li><li><a href="#wide">\u5E7F\u5EA6\u4E0E\u6DF1\u5EA6</a></li><li><a href="#philosophy">\u54F2\u5B66</a></li><li><a href="#english">\u82F1\u8BED</a></li><li><a href="#how">\u600E\u4E48\u5B66</a></li><li><a href="#system">\u77E5\u8BC6\u4F53\u7CFB</a></li><li><a href="#forget">\u514B\u670D\u9057\u5FD8</a></li><li><a href="#fragment">\u788E\u7247\u65F6\u95F4</a></li><li><a href="#use">\u7528\u8D77\u6765</a></li><li><a href="#share">\u6280\u672F\u5206\u4EAB</a></li><li><a href="#wheel">\u9020\u4E2A\u8F6E\u5B50</a></li></ul><p>\u6211\u4EEC\u76F8\u4FE1\u52AA\u529B\u5B66\u4E60\u4E00\u5B9A\u4F1A\u6709\u6536\u83B7\uFF0C\u4F46\u662F\u65B9\u6CD5\u4E0D\u5F53\uFF0C\u65E2\u8BA9\u4EBA\u8EAB\u5FC3\u75B2\u60EB\uFF0C\u4E5F\u6CA1\u6709\u5207\u5B9E\u7684\u56DE\u62A5\u3002\u9AD8\u4E2D\u65F6\u4EE3\uFF0C\u6211\u7684\u540C\u684C\u662F\u4E2A\u6F02\u4EAE\u5973\u540C\u5B66\u3002\u5979\u7684\u7269\u7406\u6210\u7EE9\u5F88\u5DEE\uFF0C\u867D\u7136\u5979\u975E\u5E38\u52E4\u594B\u7684\u5B66\u4E60\uFF0C\u4F46\u6210\u7EE9\u603B\u662F\u4E0D\u7406\u60F3\u3002\u4E3A\u4E86\u5DE9\u56FA\u7EAF\u6D01\u7684\u540C\u5B66\u5173\u7CFB\uFF0C\u6211\u4EB2\u5BC6\u65E0\u95F4\u5730\u8F85\u5BFC\u5979\u7684\u7269\u7406\uFF0C\u53D1\u73B0<strong>\u5979\u4E0D\u77E5\u9053\u9898\u76EE\u8003\u4EC0\u4E48</strong>\u3002\u6211\u4EEC\u7684\u6559\u79D1\u4E66\u4E0E\u8BD5\u9898\u90FD\u56F4\u7ED5\u7740\u8003\u8BD5\u5927\u7EB2\u5C55\u5F00\uFF0C\u770B\u5230\u4E00\u9053\u9898\uFF0C\u5E94\u8BE5\u5148\u60F3\u60F3\u5B83\u5728\u8003\u54EA\u4E9B\u5B9A\u7406\u548C\u516C\u5F0F\u7684\u8FD0\u7528\u3002<br> 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aria-hidden="true">#</a> \u57FA\u7840\u4E0E\u5E94\u7528</h4><p>\u8FD1\u4E9B\u5E74\u8BDE\u751F\u4E86\u8BB8\u591A\u65B0\u6280\u672F\uFF0C\u6BD4\u5982\u6700\u65F6\u9AE6\u7684AI(\u76EE\u524D\u8FD8\u5728\u667A\u969C\u9636\u6BB5)\uFF0C\u6570\u5B66\u57FA\u7840\u662F\u521D\u4E2D\u5C31\u63A5\u89E6\u8FC7\u7684\u6982\u7387\u7EDF\u8BA1\u3002\u4E07\u4E08\u9AD8\u697C\u4ECE\u5730\u8D77\uFF0C\u4E0D\u8981\u88AB\u65B0\u5DE5\u5177\u6216\u8005\u4E2D\u95F4\u4EF6\u8FF7\u4F4F\u53CC\u773C\uFF0C\u4E00\u5473\u5730\u8FFD\u65B0\u6C42\u5FEB\u3002\u57FA\u7840\u77E5\u8BC6\u662F\u6240\u6709\u6280\u672F\u7684\u57FA\u77F3\uFF0C\u5728\u672A\u6765\u5F88\u957F\u7684\u65F6\u95F4\u90FD\u4E0D\u4F1A\u53D8\u5316\uFF0C\u5E94\u8BE5\u82B1\u8D39\u8DB3\u591F\u7684\u65F6\u95F4\u5DE9\u56FA\u57FA\u7840\u3002<br> 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id="\u5E7F\u5EA6\u4E0E\u6DF1\u5EA6" tabindex="-1"><a class="header-anchor" href="#\u5E7F\u5EA6\u4E0E\u6DF1\u5EA6" aria-hidden="true">#</a> \u5E7F\u5EA6\u4E0E\u6DF1\u5EA6</h4><p>\u8BB8\u591A\u516C\u53F8\u7684\u62DB\u8058JD\u6CA1\u6709\u8BBE\u5B9A\u6280\u672F\u4EBA\u5458\u5E74\u9F84\u95E8\u69DB\uFF0C\u4F46\u662F\u4F1A\u52A0\u4E0A\u4E00\u53E5\u201C\u5177\u5907\u4E0E\u5E74\u9F84\u76F8\u5F53\u7684\u77E5\u8BC6\u7684\u5E7F\u5EA6\u4E0E\u6DF1\u5EA6\u201D\u3002\u591A\u5E7F\u624D\u7B97\u5E7F\uFF0C\u591A\u6DF1\u624D\u7B97\u6DF1\uFF1F\u8FD9\u662F\u5F88\u4E3B\u89C2\u7684\u8BDD\u9898\uFF0C\u8FD9\u91CC\u4E0D\u5C55\u5F00\u8BA8\u8BBA\u3002<br> \u2003\u2003\u5982\u4F55\u53D8\u5F97\u66F4\u5E7F\u66F4\u6DF1\u5462\uFF1F<strong>\u7A81\u7834\u6536\u5165\u4E0A\u5347\u7684\u74F6\u9888\uFF0C\u53D1\u6398\u81EA\u5DF1\u771F\u6B63\u7684\u5174\u8DA3</strong>\u3002<br> 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noreferrer"},b=a("\u300A\u4EBA\u6708\u795E\u8BDD\u300B"),_=a("\u3002\u4E3E\u4E2A\u4F8B\u5B50\uFF0C\u5F53\u8F6F\u4EF6\u7CFB\u7EDF\u9047\u5230\u6027\u80FD\u95EE\u9898\uFF0C\u5C1D\u8BD5\u4E0B\u9762\u4E24\u79CD\u54F2\u5B66\u601D\u60F3\u63D0\u5347\u6027\u80FD\uFF1A"),g=i('<ul><li>\u7A7A\u95F4\u6362\u65F6\u95F4\uFF1A\u6BD4\u5982\u5F15\u5165\u7F13\u5B58\uFF0C\u6D88\u8017\u989D\u5916\u7684\u5B58\u50A8\u63D0\u9AD8\u54CD\u5E94\u901F\u5EA6\u3002</li><li>\u65F6\u95F4\u6362\u7A7A\u95F4\uFF1A\u6BD4\u5982\u5927\u6587\u4EF6\u7684\u5206\u7247\u5904\u7406\uFF0C\u5206\u6BB5\u5904\u7406\u540E\u518D\u6C47\u603B\u7ED3\u679C\u3002</li></ul><p>\u8BBE\u8BA1\u7A33\u5065\u9AD8\u53EF\u7528\u7684\u7CFB\u7EDF\uFF0C\u5C1D\u8BD5\u4ECE\u4E09\u4E2A\u65B9\u9762\u8003\u8651\u95EE\u9898\uFF1A</p><ul><li>\u5B58\u50A8\uFF1A\u6570\u636E\u4F1A\u4E22\u5931\u5417\uFF0C\u6570\u636E\u4E00\u81F4\u6027\u600E\u4E48\u89E3\u51B3\u3002</li><li>\u8BA1\u7B97\uFF1A\u8BA1\u7B97\u600E\u4E48\u6269\u5BB9\uFF0C\u5E94\u7528\u5141\u8BB8\u4EFB\u610F\u589E\u52A0\u8282\u70B9\u5417\u3002</li><li>\u4F20\u8F93\uFF1A\u7F51\u7EDC\u4E2D\u65AD\u6216\u62E5\u585E\u600E\u4E48\u529E\u3002</li></ul><p>\u4ECE\u65E0\u6570\u7684\u5931\u8D25\u6216\u8005\u6210\u529F\u7684\u7ECF\u9A8C\u4E2D\uFF0C\u603B\u7ED3\u51FA\u9AD8\u5EA6\u6982\u62EC\u6027\u7684\u65B9\u6848\uFF0C\u8BA9\u6211\u4EEC\u4E0B\u4E00\u6B65\u505A\u7684\u66F4\u597D\u3002</p><h4 id="\u82F1\u8BED" tabindex="-1"><a class="header-anchor" href="#\u82F1\u8BED" aria-hidden="true">#</a> \u82F1\u8BED</h4><p>\u82F1\u8BED\u662F\u6781\u4E3A\u91CD\u8981\u7684\u57FA\u7840\uFF0C\u5B66\u597D\u82F1\u8BED\u4E0E\u638C\u63E1\u7F16\u7A0B\u8BED\u8A00\u4E00\u6837\u91CD\u8981\u3002\u4E14\u4E0D\u8BF4\u5916\u4F01\u5BF9\u82F1\u8BED\u7684\u8981\u6C42\uFF0C\u8BB8\u591A\u77E5\u540D\u535A\u5BA2\u5C31\u662F\u628A\u82F1\u6587\u7FFB\u8BD1\u6210\u4E2D\u6587\uFF0C\u5145\u5F53\u77E5\u8BC6\u7684\u642C\u8FD0\u5DE5\u3002\u5982\u679C\u82F1\u8BED\u8DB3\u591F\u597D\uFF0C\u76F4\u63A5\u9605\u8BFB\u4E00\u624B\u82F1\u8BED\u8D44\u6599\uFF0C\u907F\u514D\u4ED6\u4EBA\u7FFB\u8BD1\u5B58\u5728\u7684\u8C2C\u8BEF\u3002</p><h3 id="\u600E\u4E48\u5B66" tabindex="-1"><a class="header-anchor" href="#\u600E\u4E48\u5B66" aria-hidden="true">#</a> \u600E\u4E48\u5B66</h3><h4 id="\u77E5\u8BC6\u4F53\u7CFB" tabindex="-1"><a class="header-anchor" href="#\u77E5\u8BC6\u4F53\u7CFB" aria-hidden="true">#</a> \u77E5\u8BC6\u4F53\u7CFB</h4><p>\u4F53\u7CFB\u5316\u7684\u77E5\u8BC6\u6BD4\u96F6\u6563\u7684\u66F4\u5BB9\u6613\u8BB0\u5FC6\u548C\u7406\u89E3\uFF0C\u8FD9\u6B63\u5982\u4E00\u90E8\u597D\u7684\u7535\u89C6\u5267\uFF0C\u5267\u60C5\u73AF\u73AF\u76F8\u6263\u624D\u80FD\u5438\u5F15\u89C2\u4F17\u3002\u5EFA\u8BAE\u5927\u5BB6\u4F7F\u7528\u601D\u7EF4\u5BFC\u56FE\u7F57\u5217\u77E5\u8BC6\u70B9\uFF0C\u6784\u5EFA\u4F53\u7CFB\u7ED3\u6784\uFF0C\u5982\u4E0B\u56FE\u6240\u793A\uFF1A</p><p><img src="https://img2018.cnblogs.com/blog/31085/201906/31085-20190607182832666-1215142380.png" alt=""></p><h4 id="\u514B\u670D\u9057\u5FD8" tabindex="-1"><a class="header-anchor" href="#\u514B\u670D\u9057\u5FD8" aria-hidden="true">#</a> 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id="\u788E\u7247\u65F6\u95F4" tabindex="-1"><a class="header-anchor" href="#\u788E\u7247\u65F6\u95F4" aria-hidden="true">#</a> \u788E\u7247\u65F6\u95F4</h4><p>\u4E0D\u5C11\u670B\u53CB\u5229\u7528\u788E\u7247\u65F6\u95F4\u5B66\u4E60\uFF0C\u6BD4\u5982\u5728\u516C\u4EA4\u4E0A\u770B\u516C\u4F17\u53F7\u7684\u63A8\u9001\u3002\u5176\u5B9E\u6211\u4EEC\u90FD\u9AD8\u4F30\u4E86\u81EA\u5DF1\u7684\u6297\u5E72\u6270\u80FD\u529B\uFF0C\u5982\u679C\u5904\u5728\u5608\u6742\u7684\u73AF\u5883\uFF0C\u6CE8\u610F\u529B\u5BB9\u6613\u88AB\u6253\u65AD\uFF0C\u8BB0\u5FC6\u7559\u5B58\u5EA6\u4E5F\u5F88\u4F4E\u3002\u788E\u7247\u65F6\u95F4\u9002\u5408\u5B66\u4E60\u7B80\u5355\u5B64\u7ACB\u7684\u77E5\u8BC6\u70B9\uFF0C\u6BD4\u5982\u94FE\u8868\u7684\u5B9A\u4E49\u4E0E\u5B9E\u73B0\u3002<br> 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href="#wheel">\u9020\u4E2A\u8F6E\u5B50</a></li></ul><p>\u6211\u4EEC\u76F8\u4FE1\u52AA\u529B\u5B66\u4E60\u4E00\u5B9A\u4F1A\u6709\u6536\u83B7\uFF0C\u4F46\u662F\u65B9\u6CD5\u4E0D\u5F53\uFF0C\u65E2\u8BA9\u4EBA\u8EAB\u5FC3\u75B2\u60EB\uFF0C\u4E5F\u6CA1\u6709\u5207\u5B9E\u7684\u56DE\u62A5\u3002\u9AD8\u4E2D\u65F6\u4EE3\uFF0C\u6211\u7684\u540C\u684C\u662F\u4E2A\u6F02\u4EAE\u5973\u540C\u5B66\u3002\u5979\u7684\u7269\u7406\u6210\u7EE9\u5F88\u5DEE\uFF0C\u867D\u7136\u5979\u975E\u5E38\u52E4\u594B\u7684\u5B66\u4E60\uFF0C\u4F46\u6210\u7EE9\u603B\u662F\u4E0D\u7406\u60F3\u3002\u4E3A\u4E86\u5DE9\u56FA\u7EAF\u6D01\u7684\u540C\u5B66\u5173\u7CFB\uFF0C\u6211\u4EB2\u5BC6\u65E0\u95F4\u5730\u8F85\u5BFC\u5979\u7684\u7269\u7406\uFF0C\u53D1\u73B0<strong>\u5979\u4E0D\u77E5\u9053\u9898\u76EE\u8003\u4EC0\u4E48</strong>\u3002\u6211\u4EEC\u7684\u6559\u79D1\u4E66\u4E0E\u8BD5\u9898\u90FD\u56F4\u7ED5\u7740\u8003\u8BD5\u5927\u7EB2\u5C55\u5F00\uFF0C\u770B\u5230\u4E00\u9053\u9898\uFF0C\u5E94\u8BE5\u5148\u60F3\u60F3\u5B83\u5728\u8003\u54EA\u4E9B\u5B9A\u7406\u548C\u516C\u5F0F\u7684\u8FD0\u7528\u3002<br> 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aria-hidden="true">#</a> \u57FA\u7840\u4E0E\u5E94\u7528</h4><p>\u8FD1\u4E9B\u5E74\u8BDE\u751F\u4E86\u8BB8\u591A\u65B0\u6280\u672F\uFF0C\u6BD4\u5982\u6700\u65F6\u9AE6\u7684AI(\u76EE\u524D\u8FD8\u5728\u667A\u969C\u9636\u6BB5)\uFF0C\u6570\u5B66\u57FA\u7840\u662F\u521D\u4E2D\u5C31\u63A5\u89E6\u8FC7\u7684\u6982\u7387\u7EDF\u8BA1\u3002\u4E07\u4E08\u9AD8\u697C\u4ECE\u5730\u8D77\uFF0C\u4E0D\u8981\u88AB\u65B0\u5DE5\u5177\u6216\u8005\u4E2D\u95F4\u4EF6\u8FF7\u4F4F\u53CC\u773C\uFF0C\u4E00\u5473\u5730\u8FFD\u65B0\u6C42\u5FEB\u3002\u57FA\u7840\u77E5\u8BC6\u662F\u6240\u6709\u6280\u672F\u7684\u57FA\u77F3\uFF0C\u5728\u672A\u6765\u5F88\u957F\u7684\u65F6\u95F4\u90FD\u4E0D\u4F1A\u53D8\u5316\uFF0C\u5E94\u8BE5\u82B1\u8D39\u8DB3\u591F\u7684\u65F6\u95F4\u5DE9\u56FA\u57FA\u7840\u3002<br> 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id="\u5E7F\u5EA6\u4E0E\u6DF1\u5EA6" tabindex="-1"><a class="header-anchor" href="#\u5E7F\u5EA6\u4E0E\u6DF1\u5EA6" aria-hidden="true">#</a> \u5E7F\u5EA6\u4E0E\u6DF1\u5EA6</h4><p>\u8BB8\u591A\u516C\u53F8\u7684\u62DB\u8058JD\u6CA1\u6709\u8BBE\u5B9A\u6280\u672F\u4EBA\u5458\u5E74\u9F84\u95E8\u69DB\uFF0C\u4F46\u662F\u4F1A\u52A0\u4E0A\u4E00\u53E5\u201C\u5177\u5907\u4E0E\u5E74\u9F84\u76F8\u5F53\u7684\u77E5\u8BC6\u7684\u5E7F\u5EA6\u4E0E\u6DF1\u5EA6\u201D\u3002\u591A\u5E7F\u624D\u7B97\u5E7F\uFF0C\u591A\u6DF1\u624D\u7B97\u6DF1\uFF1F\u8FD9\u662F\u5F88\u4E3B\u89C2\u7684\u8BDD\u9898\uFF0C\u8FD9\u91CC\u4E0D\u5C55\u5F00\u8BA8\u8BBA\u3002<br> \u2003\u2003\u5982\u4F55\u53D8\u5F97\u66F4\u5E7F\u66F4\u6DF1\u5462\uFF1F<strong>\u7A81\u7834\u6536\u5165\u4E0A\u5347\u7684\u74F6\u9888\uFF0C\u53D1\u6398\u81EA\u5DF1\u771F\u6B63\u7684\u5174\u8DA3</strong>\u3002<br> 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\u54F2\u5B66</h4>',10),p=a("\u54F2\u5B66\u4E0D\u662F\u6545\u4F5C\u9AD8\u6DF1\u7684\u5B66\u79D1\uFF0C\u5B83\u7684\u73B0\u5B9E\u610F\u4E49\u5C31\u662F\u89E3\u51B3\u95EE\u9898\u3002\u5E74\u8F7B\u5C0F\u4F19\u662F\u600E\u4E48\u6CE1\u599E\u7684\uFF1F\u4E09\u5929\u4E24\u5934\u82B1\u4E0D\u65AD\uFF0C\u5927\u5EAD\u5E7F\u4F17\u8DEA\u6C42\u7231\u3002\u8FD9\u7C7B\u5957\u8DEF\u4E3A\u4EC0\u4E48\u603B\u662F\u80FD\u6210\u529F\u5462\uFF1F\u793C\u7269\u6EE1\u8DB3\u5973\u4EBA\u7684\u7269\u6B32\uFF0C\u5F53\u4F17\u6C42\u7231\u6EE1\u8DB3\u5973\u4EBA\u7684\u865A\u8363\u5FC3\uFF0C\u6295\u5176\u6240\u597D\u3002\u98DF\u5802\u5927\u5988\u6253\u83DC\u7684\u624B\u8D8A\u6765\u8D8A\u6296\uFF0C\u8FA3\u5B50\u9E21\u4E01\u53D8\u6210\u8FA3\u5B50\u8FA3\u4E01\uFF0C\u4E3A\u4EC0\u4E48\u5462\uFF1F\u98DF\u5802\u8981\u63A7\u5236\u6210\u672C\uFF0C\u76F4\u63A5\u63D0\u4EF7\u4F1A\u60F9\u4F17\u6012\u3002"),c=e("br",null,null,-1),f=a(" \u2003\u2003\u79D1\u5B66\u4E0A\u7684\u54F2\u5B66\uFF0C\u4E00\u822C\u6307\u7814\u7A76\u4E8B\u7269\u53D1\u5C55\u7684\u89C4\u5F8B\uFF0C\u5F52\u7EB3\u7EC8\u6781\u7684\u89E3\u51B3\u65B9\u6848\u3002\u8F6F\u4EF6\u884C\u4E1A\u5145\u6EE1\u54F2\u5B66\u5473\u9053\u7684\u4F5C\u54C1\u975E\u5E38\u591A\uFF0C\u6BD4\u5982"),u={href:"https://item.jd.com/12401749.html",target:"_blank",rel:"noopener noreferrer"},b=a("\u300A\u4EBA\u6708\u795E\u8BDD\u300B"),_=a("\u3002\u4E3E\u4E2A\u4F8B\u5B50\uFF0C\u5F53\u8F6F\u4EF6\u7CFB\u7EDF\u9047\u5230\u6027\u80FD\u95EE\u9898\uFF0C\u5C1D\u8BD5\u4E0B\u9762\u4E24\u79CD\u54F2\u5B66\u601D\u60F3\u63D0\u5347\u6027\u80FD\uFF1A"),g=i('<ul><li>\u7A7A\u95F4\u6362\u65F6\u95F4\uFF1A\u6BD4\u5982\u5F15\u5165\u7F13\u5B58\uFF0C\u6D88\u8017\u989D\u5916\u7684\u5B58\u50A8\u63D0\u9AD8\u54CD\u5E94\u901F\u5EA6\u3002</li><li>\u65F6\u95F4\u6362\u7A7A\u95F4\uFF1A\u6BD4\u5982\u5927\u6587\u4EF6\u7684\u5206\u7247\u5904\u7406\uFF0C\u5206\u6BB5\u5904\u7406\u540E\u518D\u6C47\u603B\u7ED3\u679C\u3002</li></ul><p>\u8BBE\u8BA1\u7A33\u5065\u9AD8\u53EF\u7528\u7684\u7CFB\u7EDF\uFF0C\u5C1D\u8BD5\u4ECE\u4E09\u4E2A\u65B9\u9762\u8003\u8651\u95EE\u9898\uFF1A</p><ul><li>\u5B58\u50A8\uFF1A\u6570\u636E\u4F1A\u4E22\u5931\u5417\uFF0C\u6570\u636E\u4E00\u81F4\u6027\u600E\u4E48\u89E3\u51B3\u3002</li><li>\u8BA1\u7B97\uFF1A\u8BA1\u7B97\u600E\u4E48\u6269\u5BB9\uFF0C\u5E94\u7528\u5141\u8BB8\u4EFB\u610F\u589E\u52A0\u8282\u70B9\u5417\u3002</li><li>\u4F20\u8F93\uFF1A\u7F51\u7EDC\u4E2D\u65AD\u6216\u62E5\u585E\u600E\u4E48\u529E\u3002</li></ul><p>\u4ECE\u65E0\u6570\u7684\u5931\u8D25\u6216\u8005\u6210\u529F\u7684\u7ECF\u9A8C\u4E2D\uFF0C\u603B\u7ED3\u51FA\u9AD8\u5EA6\u6982\u62EC\u6027\u7684\u65B9\u6848\uFF0C\u8BA9\u6211\u4EEC\u4E0B\u4E00\u6B65\u505A\u7684\u66F4\u597D\u3002</p><h4 id="\u82F1\u8BED" tabindex="-1"><a class="header-anchor" href="#\u82F1\u8BED" aria-hidden="true">#</a> \u82F1\u8BED</h4><p>\u82F1\u8BED\u662F\u6781\u4E3A\u91CD\u8981\u7684\u57FA\u7840\uFF0C\u5B66\u597D\u82F1\u8BED\u4E0E\u638C\u63E1\u7F16\u7A0B\u8BED\u8A00\u4E00\u6837\u91CD\u8981\u3002\u4E14\u4E0D\u8BF4\u5916\u4F01\u5BF9\u82F1\u8BED\u7684\u8981\u6C42\uFF0C\u8BB8\u591A\u77E5\u540D\u535A\u5BA2\u5C31\u662F\u628A\u82F1\u6587\u7FFB\u8BD1\u6210\u4E2D\u6587\uFF0C\u5145\u5F53\u77E5\u8BC6\u7684\u642C\u8FD0\u5DE5\u3002\u5982\u679C\u82F1\u8BED\u8DB3\u591F\u597D\uFF0C\u76F4\u63A5\u9605\u8BFB\u4E00\u624B\u82F1\u8BED\u8D44\u6599\uFF0C\u907F\u514D\u4ED6\u4EBA\u7FFB\u8BD1\u5B58\u5728\u7684\u8C2C\u8BEF\u3002</p><h3 id="\u600E\u4E48\u5B66" tabindex="-1"><a class="header-anchor" href="#\u600E\u4E48\u5B66" aria-hidden="true">#</a> \u600E\u4E48\u5B66</h3><h4 id="\u77E5\u8BC6\u4F53\u7CFB" tabindex="-1"><a class="header-anchor" href="#\u77E5\u8BC6\u4F53\u7CFB" aria-hidden="true">#</a> \u77E5\u8BC6\u4F53\u7CFB</h4><p>\u4F53\u7CFB\u5316\u7684\u77E5\u8BC6\u6BD4\u96F6\u6563\u7684\u66F4\u5BB9\u6613\u8BB0\u5FC6\u548C\u7406\u89E3\uFF0C\u8FD9\u6B63\u5982\u4E00\u90E8\u597D\u7684\u7535\u89C6\u5267\uFF0C\u5267\u60C5\u73AF\u73AF\u76F8\u6263\u624D\u80FD\u5438\u5F15\u89C2\u4F17\u3002\u5EFA\u8BAE\u5927\u5BB6\u4F7F\u7528\u601D\u7EF4\u5BFC\u56FE\u7F57\u5217\u77E5\u8BC6\u70B9\uFF0C\u6784\u5EFA\u4F53\u7CFB\u7ED3\u6784\uFF0C\u5982\u4E0B\u56FE\u6240\u793A\uFF1A</p><p><img src="https://img2018.cnblogs.com/blog/31085/201906/31085-20190607182832666-1215142380.png" alt=""></p><h4 id="\u514B\u670D\u9057\u5FD8" tabindex="-1"><a class="header-anchor" href="#\u514B\u670D\u9057\u5FD8" aria-hidden="true">#</a> \u514B\u670D\u9057\u5FD8</h4><p>\u9AD8\u4E2D\u662F\u6211\u4EEC\u77E5\u8BC6\u7684\u5DC5\u5CF0\u65F6\u523B\uFF0C\u6BCF\u5468\u5C0F\u8003\u6BCF\u6708\u5927\u8003\uFF0C\u6559\u8F85\u8D44\u6599\u5806\u6210\u5C71\uFF0C\u5730\u72F1\u5F0F\u7684\u53CD\u590D\u64CD\u7EC3\u5F3A\u5316\u8BB0\u5FC6\u3002\u590D\u4E60\u662F\u5BF9\u6297\u9057\u5FD8\u7684\u552F\u4E00\u529E\u6CD5\u3002\u5927\u8111\u7684\u9057\u5FD8\u662F\u6709\u89C4\u5F8B\u7684\uFF0C\u5148\u5FEB\u540E\u6162\u3002\u4E00\u5929\u540E\uFF0C\u5B66\u5230\u7684\u77E5\u8BC6\u53EA\u5269\u4E0B\u539F\u6765\u768425%\uFF0C\u751A\u81F3\u66F4\u4F4E\u3002\u968F\u7740\u65F6\u95F4\u7684\u63A8\u79FB\uFF0C\u9057\u5FD8\u7684\u901F\u5EA6\u51CF\u6162\uFF0C\u9057\u5FD8\u7684\u6570\u91CF\u4E5F\u5C31\u51CF\u5C11\u3002</p><p>\u65F6\u95F4\u95F4\u9694</p><p>\u8BB0\u5FC6\u91CF</p><p>\u521A\u770B\u5B8C</p><p>100%</p><p>20\u5206\u949F\u540E</p><p>60%</p><p>1\u5C0F\u65F6\u540E</p><p>40%</p><p>1\u5929\u540E</p><p>30%</p><p>2\u5929\u540E</p><p>27%</p><p>\u6BCF\u4E2A\u4EBA\u7684\u9057\u5FD8\u7A0B\u5EA6\u90FD\u4E0D\u4E00\u6837\uFF0C\u5EFA\u8BAE\u7B2C\u4E8C\u5929\u590D\u4E60\u524D\u4E00\u5929\u7684\u5185\u5BB9\uFF0C\u4E03\u5929\u540E\u590D\u4E60\u8FD9\u6BB5\u65F6\u95F4\u7684\u6240\u6709\u5185\u5BB9\u3002</p><h4 id="\u788E\u7247\u65F6\u95F4" tabindex="-1"><a class="header-anchor" href="#\u788E\u7247\u65F6\u95F4" aria-hidden="true">#</a> \u788E\u7247\u65F6\u95F4</h4><p>\u4E0D\u5C11\u670B\u53CB\u5229\u7528\u788E\u7247\u65F6\u95F4\u5B66\u4E60\uFF0C\u6BD4\u5982\u5728\u516C\u4EA4\u4E0A\u770B\u516C\u4F17\u53F7\u7684\u63A8\u9001\u3002\u5176\u5B9E\u6211\u4EEC\u90FD\u9AD8\u4F30\u4E86\u81EA\u5DF1\u7684\u6297\u5E72\u6270\u80FD\u529B\uFF0C\u5982\u679C\u5904\u5728\u5608\u6742\u7684\u73AF\u5883\uFF0C\u6CE8\u610F\u529B\u5BB9\u6613\u88AB\u6253\u65AD\uFF0C\u8BB0\u5FC6\u7559\u5B58\u5EA6\u4E5F\u5F88\u4F4E\u3002\u788E\u7247\u65F6\u95F4\u9002\u5408\u5B66\u4E60\u7B80\u5355\u5B64\u7ACB\u7684\u77E5\u8BC6\u70B9\uFF0C\u6BD4\u5982\u94FE\u8868\u7684\u5B9A\u4E49\u4E0E\u5B9E\u73B0\u3002<br> \u2003\u2003\u5B66\u4E60\u590D\u6742\u7684\u77E5\u8BC6\uFF0C\u9700\u8981\u5927\u6BB5\u7684\u8FDE\u7EED\u65F6\u95F4\u3002\u56FE\u4E66\u9986\u662F\u4E2A\u597D\u5730\u65B9\uFF0C\u5B89\u9759\u6C1B\u56F4\u597D\u3002\u624B\u673A\u653E\u4E00\u8FB9\uFF0C\u4E0D\u8981\u7406\u4F1AQQ\u5FAE\u4FE1\uFF0C\u6700\u597D\u9605\u8BFB\u7EB8\u8D28\u4E66\uFF0C\u6CE1\u4E0A\u4E00\u6574\u5929\u3002\u6709\u4E9B\u57CE\u5E02\u51FA\u73B0\u4E86\u4ED8\u8D39\u81EA\u4E60\u5BA4\uFF0C\u63D0\u4F9B\u683C\u5B50\u95F4\u3001\u8336\u6C34\u7B49\u7B49\uFF0C\u4E5F\u662F\u975E\u5E38\u597D\u7684\u9009\u62E9\u3002</p><h3 id="\u7528\u8D77\u6765" tabindex="-1"><a class="header-anchor" href="#\u7528\u8D77\u6765" aria-hidden="true">#</a> \u7528\u8D77\u6765</h3><h3 id="\u6280\u672F\u5206\u4EAB" tabindex="-1"><a class="header-anchor" href="#\u6280\u672F\u5206\u4EAB" aria-hidden="true">#</a> \u6280\u672F\u5206\u4EAB</h3><p>\u4ECE\u4E0B\u9762\u8FD9\u5F20\u56FE\u6211\u4EEC\u53EF\u4EE5\u770B\u5230\uFF0C\u6559\u6388\u4ED6\u4EBA\u662F\u77E5\u8BC6\u7559\u5B58\u7387\u6700\u9AD8\u7684\u65B9\u5F0F\u3002<br><img src="https://img2018.cnblogs.com/blog/31085/201905/31085-20190527232022474-1815067006.png" alt=""></p><p>\u51C6\u5907PPT\u548C\u6F14\u8BB2\u5185\u5BB9\uFF0C\u7ED9\u540C\u4E8B\u6765\u4E00\u573A\u6280\u672F\u5206\u4EAB\u3002\u4E0D\u5149\u590D\u4E60\u77E5\u8BC6\uFF0C\u8FD8\u953B\u70BC\u53E3\u624D\u3002\u66FE\u7ECF\u6709\u4E2A\u540C\u4E8B\u8BF4\u8BDD\u53C8\u5FEB\u53C8\u6025\uFF0C\u53E3\u5934\u7985\u4E5F\u591A\uFF0C\u6BD4\u5982&quot;\u5BF9\u5427\u3001\u662F\u4E0D\u662F\u201D\uFF0C\u522B\u4EBA\u7ECF\u5E38\u542C\u4E0D\u6E05\uFF0C\u4F46\u662F\u4ED6\u672C\u4EBA\u4E0D\u4EE5\u4E3A\u7136\u3002\u9886\u5BFC\u8BA9\u4ED6\u505A\u4E86\u51E0\u6B21\u6280\u672F\u5206\u4EAB\uFF0C\u542C\u4F17\u7684\u53CD\u5E94\u53EF\u60F3\u800C\u77E5\uFF0C\u4ED6\u624D\u5F7B\u5E95\u8BA4\u6E05\u7F3A\u70B9\u3002<br> \u2003\u2003\u575A\u6301\u5199\u6280\u672F\u535A\u5BA2\uFF0C\u522B\u5728\u610F\u4F60\u5199\u7684\u4E1C\u897F\u5728\u7F51\u4E0A\u5DF2\u7ECF\u91CD\u590D\u5343\u767E\u904D\u3002\u5F53\u81EA\u5DF1\u52A8\u624B\u7684\u65F6\u5019\uFF0C\u624D\u4F1A\u610F\u8BC6\u5230\u773C\u9AD8\u624B\u4F4E\u3002\u8BA9\u6587\u7AE0\u8BFB\u8D77\u6765\u6D41\u7545\u6E05\u6670\uFF0C\u9700\u8981\u5455\u5FC3\u6CA5\u8840\u7684\u5220\u6539\u3002\u5199\u4F5C\u662F\u5BF9\u5927\u8111\u7684\u957F\u671F\u8003\u9A8C\uFF0C\u60F3\u4E0D\u5230\u80AF\u5B9A\u5199\u4E0D\u51FA\uFF0C\u60F3\u4E0D\u6E05\u695A\u80AF\u5B9A\u5199\u4E0D\u6E05\u695A\u3002</p><h3 id="\u9020\u4E2A\u8F6E\u5B50" tabindex="-1"><a class="header-anchor" href="#\u9020\u4E2A\u8F6E\u5B50" aria-hidden="true">#</a> \u9020\u4E2A\u8F6E\u5B50</h3><p>\u6211\u4EEC\u7ECF\u5E38\u8BF4\u4E0D\u8981\u91CD\u590D\u9020\u8F6E\u5B50\u3002\u4E3A\u4E86\u5F00\u53D1\u6548\u7387\uFF0C\u53EF\u4EE5\u4E0D\u9020\u8F6E\u5B50\uFF0C\u4F46\u662F\u5FC5\u987B\u5177\u5907\u9020\u8F6E\u5B50\u7684\u80FD\u529B\u3002\u5EFA\u8BAE\u9020\u4E00\u4E2A\u7B80\u5355\u7684MQ\uFF0C\u4F60\u80FD\u7528\u5230\u901A\u4FE1\u534F\u8BAE\u3001\u8BBE\u8BA1\u6A21\u5F0F\u3001\u961F\u5217\u7B49\u8BB8\u591A\u77E5\u8BC6\u3002\u5728\u9020\u8F6E\u5B50\u7684\u8FC7\u7A0B\u4E2D\uFF0C\u4F60\u4F1A\u9891\u7E41\u7684\u7FFB\u9605\u5404\u79CD\u624B\u518C\u6216\u8005\u535A\u5BA2\uFF0C\u8FD9\u5C31\u662F<strong>\u7528\u8F93\u51FA\u5012\u903C\u8F93\u5165</strong>\u3002</p>',33);function x(m,v){const r=l("ExternalLinkIcon");return t(),n("div",null,[d,e("p",null,[p,c,f,e("a",u,[b,o(r)]),_]),g])}var k=h(s,[["render",x],["__file","BOKEYUANruhegaoxiaodixuexijishu.html.vue"]]);export{k as default};
diff --git a/dist/assets/BlockingQueue.html.5fa0f03a.js b/dist/assets/BlockingQueue.html.76b31f3c.js
similarity index 99%
rename from dist/assets/BlockingQueue.html.5fa0f03a.js
rename to dist/assets/BlockingQueue.html.76b31f3c.js
index 3c44a29c..18cb1e5b 100644
--- a/dist/assets/BlockingQueue.html.5fa0f03a.js
+++ b/dist/assets/BlockingQueue.html.76b31f3c.js
@@ -1,4 +1,4 @@
-import{_ as t}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o,c,a as n,b as a,e as l,d as e}from"./app.a0271b9c.js";const i={},u=l(`<p>\u6700\u5E38\u7528\u7684&quot;<strong>\u751F\u4EA7\u8005-\u6D88\u8D39\u8005</strong>&quot;\u95EE\u9898\u4E2D\uFF0C\u961F\u5217\u901A\u5E38\u88AB\u89C6\u4F5C\u7EBF\u7A0B\u95F4\u64CD\u4F5C\u7684\u6570\u636E\u5BB9\u5668\uFF0C\u8FD9\u6837\uFF0C\u53EF\u4EE5\u5BF9\u5404\u4E2A\u6A21\u5757\u7684\u4E1A\u52A1\u529F\u80FD\u8FDB\u884C\u89E3\u8026\uFF0C\u751F\u4EA7\u8005\u5C06\u201C\u751F\u4EA7\u201D\u51FA\u6765\u7684\u6570\u636E\u653E\u7F6E\u5728\u6570\u636E\u5BB9\u5668\u4E2D\uFF0C\u800C\u6D88\u8D39\u8005\u4EC5\u4EC5\u53EA\u9700\u8981\u5728\u201C\u6570\u636E\u5BB9\u5668\u201D\u4E2D\u8FDB\u884C\u83B7\u53D6\u6570\u636E\u5373\u53EF\uFF0C\u8FD9\u6837\u751F\u4EA7\u8005\u7EBF\u7A0B\u548C\u6D88\u8D39\u8005\u7EBF\u7A0B\u5C31\u80FD\u591F\u8FDB\u884C\u89E3\u8026\uFF0C\u53EA\u4E13\u6CE8\u4E8E\u81EA\u5DF1\u7684\u4E1A\u52A1\u529F\u80FD\u5373\u53EF\u3002</p><p>\u963B\u585E\u961F\u5217\uFF08BlockingQueue\uFF09\u88AB\u5E7F\u6CDB\u4F7F\u7528\u5728\u201C\u751F\u4EA7\u8005-\u6D88\u8D39\u8005\u201D\u95EE\u9898\u4E2D\uFF0C\u5176\u539F\u56E0\u662FBlockingQueue\u63D0\u4F9B\u4E86\u53EF\u963B\u585E\u7684\u63D2\u5165\u548C\u79FB\u9664\u7684\u65B9\u6CD5\u3002<strong>\u5F53\u961F\u5217\u5BB9\u5668\u5DF2\u6EE1\uFF0C\u751F\u4EA7\u8005\u7EBF\u7A0B\u4F1A\u88AB\u963B\u585E\uFF0C\u76F4\u5230\u961F\u5217\u672A\u6EE1\uFF1B\u5F53\u961F\u5217\u5BB9\u5668\u4E3A\u7A7A\u65F6\uFF0C\u6D88\u8D39\u8005\u7EBF\u7A0B\u4F1A\u88AB\u963B\u585E\uFF0C\u76F4\u81F3\u961F\u5217\u975E\u7A7A\u65F6\u4E3A\u6B62</strong>\u3002</p><h2 id="\u57FA\u672C\u64CD\u4F5C" tabindex="-1"><a class="header-anchor" href="#\u57FA\u672C\u64CD\u4F5C" aria-hidden="true">#</a> \u57FA\u672C\u64CD\u4F5C</h2><p>BlockingQueue\u57FA\u672C\u64CD\u4F5C\u603B\u7ED3\u5982\u4E0B\uFF08\u6B64\u56FE\u6765\u6E90\u4E8EJAVA API\u6587\u6863\uFF09\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/BlockingQueue-01.png" alt=""></p><p>BlockingQueue\u7EE7\u627F\u4E8EQueue\u63A5\u53E3\uFF0C\u56E0\u6B64\uFF0C\u5BF9\u6570\u636E\u5143\u7D20\u7684\u57FA\u672C\u64CD\u4F5C\u6709\uFF1A</p><p>1\uFF09\u63D2\u5165\u5143\u7D20</p><ol><li>add(E e) \uFF1A\u5F80\u961F\u5217\u63D2\u5165\u6570\u636E\uFF0C\u5F53\u961F\u5217\u6EE1\u65F6\uFF0C\u63D2\u5165\u5143\u7D20\u65F6\u4F1A\u629B\u51FAIllegalStateException\u5F02\u5E38\uFF1B</li><li>offer(E e)\uFF1A\u5F53\u5F80\u961F\u5217\u63D2\u5165\u6570\u636E\u65F6\uFF0C\u63D2\u5165\u6210\u529F\u8FD4\u56DE<code>true</code>\uFF0C\u5426\u5219\u5219\u8FD4\u56DE<code>false</code>\u3002\u5F53\u961F\u5217\u6EE1\u65F6\u4E0D\u4F1A\u629B\u51FA\u5F02\u5E38\uFF1B</li></ol><p>2\uFF09\u5220\u9664\u5143\u7D20</p><ol><li>remove(Object o)\uFF1A\u4ECE\u961F\u5217\u4E2D\u5220\u9664\u6570\u636E\uFF0C\u6210\u529F\u5219\u8FD4\u56DE<code>true</code>\uFF0C\u5426\u5219\u4E3A<code>false</code></li><li>poll\uFF1A\u5220\u9664\u6570\u636E\uFF0C\u5F53\u961F\u5217\u4E3A\u7A7A\u65F6\uFF0C\u8FD4\u56DEnull\uFF1B</li></ol><p>3\uFF09\u67E5\u770B\u5143\u7D20</p><ol><li>element\uFF1A\u83B7\u53D6\u961F\u5934\u5143\u7D20\uFF0C\u5982\u679C\u961F\u5217\u4E3A\u7A7A\u65F6\u5219\u629B\u51FANoSuchElementException\u5F02\u5E38\uFF1B</li><li>peek\uFF1A\u83B7\u53D6\u961F\u5934\u5143\u7D20\uFF0C\u5982\u679C\u961F\u5217\u4E3A\u7A7A\u5219\u629B\u51FANoSuchElementException\u5F02\u5E38</li></ol><p>BlockingQueue\u5177\u6709\u7684\u7279\u6B8A\u64CD\u4F5C\uFF1A</p><p>1\uFF09\u63D2\u5165\u6570\u636E\uFF1A</p><ol><li>put\uFF1A\u5F53\u963B\u585E\u961F\u5217\u5BB9\u91CF\u5DF2\u7ECF\u6EE1\u65F6\uFF0C\u5F80\u963B\u585E\u961F\u5217\u63D2\u5165\u6570\u636E\u7684\u7EBF\u7A0B\u4F1A\u88AB\u963B\u585E\uFF0C\u76F4\u81F3\u963B\u585E\u961F\u5217\u5DF2\u7ECF\u6709\u7A7A\u4F59\u7684\u5BB9\u91CF\u53EF\u4F9B\u4F7F\u7528\uFF1B</li><li><code>offer(E e, long timeout, TimeUnit unit)</code>\uFF1A\u82E5\u963B\u585E\u961F\u5217\u5DF2\u7ECF\u6EE1\u65F6\uFF0C\u540C\u6837\u4F1A\u963B\u585E\u63D2\u5165\u6570\u636E\u7684\u7EBF\u7A0B\uFF0C\u76F4\u81F3\u963B\u585E\u961F\u5217\u5DF2\u7ECF\u6709\u7A7A\u4F59\u7684\u5730\u65B9\uFF0C\u4E0Eput\u65B9\u6CD5\u4E0D\u540C\u7684\u662F\uFF0C\u8BE5\u65B9\u6CD5\u4F1A\u6709\u4E00\u4E2A\u8D85\u65F6\u65F6\u95F4\uFF0C\u82E5\u8D85\u8FC7\u5F53\u524D\u7ED9\u5B9A\u7684\u8D85\u65F6\u65F6\u95F4\uFF0C\u63D2\u5165\u6570\u636E\u7684\u7EBF\u7A0B\u4F1A\u9000\u51FA\uFF1B</li></ol><p>2\uFF09\u5220\u9664\u6570\u636E</p><ol><li><code>take()</code>\uFF1A\u5F53\u963B\u585E\u961F\u5217\u4E3A\u7A7A\u65F6\uFF0C\u83B7\u53D6\u961F\u5934\u6570\u636E\u7684\u7EBF\u7A0B\u4F1A\u88AB\u963B\u585E\uFF1B</li><li><code>poll(long timeout, TimeUnit unit)</code>\uFF1A\u5F53\u963B\u585E\u961F\u5217\u4E3A\u7A7A\u65F6\uFF0C\u83B7\u53D6\u6570\u636E\u7684\u7EBF\u7A0B\u4F1A\u88AB\u963B\u585E\uFF0C\u53E6\u5916\uFF0C\u5982\u679C\u88AB\u963B\u585E\u7684\u7EBF\u7A0B\u8D85\u8FC7\u4E86\u7ED9\u5B9A\u7684\u65F6\u957F\uFF0C\u8BE5\u7EBF\u7A0B\u4F1A\u9000\u51FA</li></ol><h2 id="\u5E38\u7528\u7684blockingqueue" tabindex="-1"><a class="header-anchor" href="#\u5E38\u7528\u7684blockingqueue" aria-hidden="true">#</a> \u5E38\u7528\u7684BlockingQueue</h2><p>\u5B9E\u73B0BlockingQueue\u63A5\u53E3\u7684\u6709<code>ArrayBlockingQueue, DelayQueue, LinkedBlockingDeque, LinkedBlockingQueue, LinkedTransferQueue, PriorityBlockingQueue, SynchronousQueue</code>\uFF0C\u800C\u8FD9\u51E0\u79CD\u5E38\u89C1\u7684\u963B\u585E\u961F\u5217\u4E5F\u662F\u5728\u5B9E\u9645\u7F16\u7A0B\u4E2D\u4F1A\u5E38\u7528\u7684\uFF0C\u4E0B\u9762\u5BF9\u8FD9\u51E0\u79CD\u5E38\u89C1\u7684\u963B\u585E\u961F\u5217\u8FDB\u884C\u8BF4\u660E\uFF1A</p><h3 id="arrayblockingqueue" tabindex="-1"><a class="header-anchor" href="#arrayblockingqueue" aria-hidden="true">#</a> ArrayBlockingQueue</h3><p><strong>ArrayBlockingQueue</strong>\u662F\u7531\u6570\u7EC4\u5B9E\u73B0\u7684\u6709\u754C\u963B\u585E\u961F\u5217\u3002\u8BE5\u961F\u5217\u547D\u4EE4\u5143\u7D20FIFO\uFF08\u5148\u8FDB\u5148\u51FA\uFF09\u3002\u56E0\u6B64\uFF0C\u5BF9\u5934\u5143\u7D20\u65F6\u961F\u5217\u4E2D\u5B58\u5728\u65F6\u95F4\u6700\u957F\u7684\u6570\u636E\u5143\u7D20\uFF0C\u800C\u5BF9\u5C3E\u6570\u636E\u5219\u662F\u5F53\u524D\u961F\u5217\u6700\u65B0\u7684\u6570\u636E\u5143\u7D20\u3002ArrayBlockingQueue\u53EF\u4F5C\u4E3A\u201C\u6709\u754C\u6570\u636E\u7F13\u51B2\u533A\u201D\uFF0C\u751F\u4EA7\u8005\u63D2\u5165\u6570\u636E\u5230\u961F\u5217\u5BB9\u5668\u4E2D\uFF0C\u5E76\u7531\u6D88\u8D39\u8005\u63D0\u53D6\u3002ArrayBlockingQueue\u4E00\u65E6\u521B\u5EFA\uFF0C\u5BB9\u91CF\u4E0D\u80FD\u6539\u53D8\u3002</p><p>\u5F53\u961F\u5217\u5BB9\u91CF\u6EE1\u65F6\uFF0C\u5C1D\u8BD5\u5C06\u5143\u7D20\u653E\u5165\u961F\u5217\u5C06\u5BFC\u81F4\u64CD\u4F5C\u963B\u585E;\u5C1D\u8BD5\u4ECE\u4E00\u4E2A\u7A7A\u961F\u5217\u4E2D\u53D6\u4E00\u4E2A\u5143\u7D20\u4E5F\u4F1A\u540C\u6837\u963B\u585E\u3002</p><p>ArrayBlockingQueue\u9ED8\u8BA4\u60C5\u51B5\u4E0B\u4E0D\u80FD\u4FDD\u8BC1\u7EBF\u7A0B\u8BBF\u95EE\u961F\u5217\u7684\u516C\u5E73\u6027\uFF0C\u6240\u8C13\u516C\u5E73\u6027\u662F\u6307\u4E25\u683C\u6309\u7167\u7EBF\u7A0B\u7B49\u5F85\u7684\u7EDD\u5BF9\u65F6\u95F4\u987A\u5E8F\uFF0C\u5373\u6700\u5148\u7B49\u5F85\u7684\u7EBF\u7A0B\u80FD\u591F\u6700\u5148\u8BBF\u95EE\u5230ArrayBlockingQueue\u3002\u800C\u975E\u516C\u5E73\u6027\u5219\u662F\u6307\u8BBF\u95EEArrayBlockingQueue\u7684\u987A\u5E8F\u4E0D\u662F\u9075\u5B88\u4E25\u683C\u7684\u65F6\u95F4\u987A\u5E8F\uFF0C\u6709\u53EF\u80FD\u5B58\u5728\uFF0C\u4E00\u65E6ArrayBlockingQueue\u53EF\u4EE5\u88AB\u8BBF\u95EE\u65F6\uFF0C\u957F\u65F6\u95F4\u963B\u585E\u7684\u7EBF\u7A0B\u4F9D\u7136\u65E0\u6CD5\u8BBF\u95EE\u5230ArrayBlockingQueue\u3002<strong>\u5982\u679C\u4FDD\u8BC1\u516C\u5E73\u6027\uFF0C\u901A\u5E38\u4F1A\u964D\u4F4E\u541E\u5410\u91CF</strong>\u3002\u5982\u679C\u9700\u8981\u83B7\u5F97\u516C\u5E73\u6027\u7684ArrayBlockingQueue\uFF0C\u53EF\u91C7\u7528\u5982\u4E0B\u4EE3\u7801\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">private</span> <span class="token keyword">static</span> <span class="token class-name">ArrayBlockingQueue</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">Integer</span><span class="token punctuation">&gt;</span></span> blockingQueue <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">ArrayBlockingQueue</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">Integer</span><span class="token punctuation">&gt;</span></span><span class="token punctuation">(</span><span class="token number">10</span><span class="token punctuation">,</span><span class="token boolean">true</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
+import{_ as t}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o,c,a as n,b as a,e as l,d as e}from"./app.615e41d8.js";const i={},u=l(`<p>\u6700\u5E38\u7528\u7684&quot;<strong>\u751F\u4EA7\u8005-\u6D88\u8D39\u8005</strong>&quot;\u95EE\u9898\u4E2D\uFF0C\u961F\u5217\u901A\u5E38\u88AB\u89C6\u4F5C\u7EBF\u7A0B\u95F4\u64CD\u4F5C\u7684\u6570\u636E\u5BB9\u5668\uFF0C\u8FD9\u6837\uFF0C\u53EF\u4EE5\u5BF9\u5404\u4E2A\u6A21\u5757\u7684\u4E1A\u52A1\u529F\u80FD\u8FDB\u884C\u89E3\u8026\uFF0C\u751F\u4EA7\u8005\u5C06\u201C\u751F\u4EA7\u201D\u51FA\u6765\u7684\u6570\u636E\u653E\u7F6E\u5728\u6570\u636E\u5BB9\u5668\u4E2D\uFF0C\u800C\u6D88\u8D39\u8005\u4EC5\u4EC5\u53EA\u9700\u8981\u5728\u201C\u6570\u636E\u5BB9\u5668\u201D\u4E2D\u8FDB\u884C\u83B7\u53D6\u6570\u636E\u5373\u53EF\uFF0C\u8FD9\u6837\u751F\u4EA7\u8005\u7EBF\u7A0B\u548C\u6D88\u8D39\u8005\u7EBF\u7A0B\u5C31\u80FD\u591F\u8FDB\u884C\u89E3\u8026\uFF0C\u53EA\u4E13\u6CE8\u4E8E\u81EA\u5DF1\u7684\u4E1A\u52A1\u529F\u80FD\u5373\u53EF\u3002</p><p>\u963B\u585E\u961F\u5217\uFF08BlockingQueue\uFF09\u88AB\u5E7F\u6CDB\u4F7F\u7528\u5728\u201C\u751F\u4EA7\u8005-\u6D88\u8D39\u8005\u201D\u95EE\u9898\u4E2D\uFF0C\u5176\u539F\u56E0\u662FBlockingQueue\u63D0\u4F9B\u4E86\u53EF\u963B\u585E\u7684\u63D2\u5165\u548C\u79FB\u9664\u7684\u65B9\u6CD5\u3002<strong>\u5F53\u961F\u5217\u5BB9\u5668\u5DF2\u6EE1\uFF0C\u751F\u4EA7\u8005\u7EBF\u7A0B\u4F1A\u88AB\u963B\u585E\uFF0C\u76F4\u5230\u961F\u5217\u672A\u6EE1\uFF1B\u5F53\u961F\u5217\u5BB9\u5668\u4E3A\u7A7A\u65F6\uFF0C\u6D88\u8D39\u8005\u7EBF\u7A0B\u4F1A\u88AB\u963B\u585E\uFF0C\u76F4\u81F3\u961F\u5217\u975E\u7A7A\u65F6\u4E3A\u6B62</strong>\u3002</p><h2 id="\u57FA\u672C\u64CD\u4F5C" tabindex="-1"><a class="header-anchor" href="#\u57FA\u672C\u64CD\u4F5C" aria-hidden="true">#</a> \u57FA\u672C\u64CD\u4F5C</h2><p>BlockingQueue\u57FA\u672C\u64CD\u4F5C\u603B\u7ED3\u5982\u4E0B\uFF08\u6B64\u56FE\u6765\u6E90\u4E8EJAVA API\u6587\u6863\uFF09\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/BlockingQueue-01.png" alt=""></p><p>BlockingQueue\u7EE7\u627F\u4E8EQueue\u63A5\u53E3\uFF0C\u56E0\u6B64\uFF0C\u5BF9\u6570\u636E\u5143\u7D20\u7684\u57FA\u672C\u64CD\u4F5C\u6709\uFF1A</p><p>1\uFF09\u63D2\u5165\u5143\u7D20</p><ol><li>add(E e) \uFF1A\u5F80\u961F\u5217\u63D2\u5165\u6570\u636E\uFF0C\u5F53\u961F\u5217\u6EE1\u65F6\uFF0C\u63D2\u5165\u5143\u7D20\u65F6\u4F1A\u629B\u51FAIllegalStateException\u5F02\u5E38\uFF1B</li><li>offer(E e)\uFF1A\u5F53\u5F80\u961F\u5217\u63D2\u5165\u6570\u636E\u65F6\uFF0C\u63D2\u5165\u6210\u529F\u8FD4\u56DE<code>true</code>\uFF0C\u5426\u5219\u5219\u8FD4\u56DE<code>false</code>\u3002\u5F53\u961F\u5217\u6EE1\u65F6\u4E0D\u4F1A\u629B\u51FA\u5F02\u5E38\uFF1B</li></ol><p>2\uFF09\u5220\u9664\u5143\u7D20</p><ol><li>remove(Object o)\uFF1A\u4ECE\u961F\u5217\u4E2D\u5220\u9664\u6570\u636E\uFF0C\u6210\u529F\u5219\u8FD4\u56DE<code>true</code>\uFF0C\u5426\u5219\u4E3A<code>false</code></li><li>poll\uFF1A\u5220\u9664\u6570\u636E\uFF0C\u5F53\u961F\u5217\u4E3A\u7A7A\u65F6\uFF0C\u8FD4\u56DEnull\uFF1B</li></ol><p>3\uFF09\u67E5\u770B\u5143\u7D20</p><ol><li>element\uFF1A\u83B7\u53D6\u961F\u5934\u5143\u7D20\uFF0C\u5982\u679C\u961F\u5217\u4E3A\u7A7A\u65F6\u5219\u629B\u51FANoSuchElementException\u5F02\u5E38\uFF1B</li><li>peek\uFF1A\u83B7\u53D6\u961F\u5934\u5143\u7D20\uFF0C\u5982\u679C\u961F\u5217\u4E3A\u7A7A\u5219\u629B\u51FANoSuchElementException\u5F02\u5E38</li></ol><p>BlockingQueue\u5177\u6709\u7684\u7279\u6B8A\u64CD\u4F5C\uFF1A</p><p>1\uFF09\u63D2\u5165\u6570\u636E\uFF1A</p><ol><li>put\uFF1A\u5F53\u963B\u585E\u961F\u5217\u5BB9\u91CF\u5DF2\u7ECF\u6EE1\u65F6\uFF0C\u5F80\u963B\u585E\u961F\u5217\u63D2\u5165\u6570\u636E\u7684\u7EBF\u7A0B\u4F1A\u88AB\u963B\u585E\uFF0C\u76F4\u81F3\u963B\u585E\u961F\u5217\u5DF2\u7ECF\u6709\u7A7A\u4F59\u7684\u5BB9\u91CF\u53EF\u4F9B\u4F7F\u7528\uFF1B</li><li><code>offer(E e, long timeout, TimeUnit unit)</code>\uFF1A\u82E5\u963B\u585E\u961F\u5217\u5DF2\u7ECF\u6EE1\u65F6\uFF0C\u540C\u6837\u4F1A\u963B\u585E\u63D2\u5165\u6570\u636E\u7684\u7EBF\u7A0B\uFF0C\u76F4\u81F3\u963B\u585E\u961F\u5217\u5DF2\u7ECF\u6709\u7A7A\u4F59\u7684\u5730\u65B9\uFF0C\u4E0Eput\u65B9\u6CD5\u4E0D\u540C\u7684\u662F\uFF0C\u8BE5\u65B9\u6CD5\u4F1A\u6709\u4E00\u4E2A\u8D85\u65F6\u65F6\u95F4\uFF0C\u82E5\u8D85\u8FC7\u5F53\u524D\u7ED9\u5B9A\u7684\u8D85\u65F6\u65F6\u95F4\uFF0C\u63D2\u5165\u6570\u636E\u7684\u7EBF\u7A0B\u4F1A\u9000\u51FA\uFF1B</li></ol><p>2\uFF09\u5220\u9664\u6570\u636E</p><ol><li><code>take()</code>\uFF1A\u5F53\u963B\u585E\u961F\u5217\u4E3A\u7A7A\u65F6\uFF0C\u83B7\u53D6\u961F\u5934\u6570\u636E\u7684\u7EBF\u7A0B\u4F1A\u88AB\u963B\u585E\uFF1B</li><li><code>poll(long timeout, TimeUnit unit)</code>\uFF1A\u5F53\u963B\u585E\u961F\u5217\u4E3A\u7A7A\u65F6\uFF0C\u83B7\u53D6\u6570\u636E\u7684\u7EBF\u7A0B\u4F1A\u88AB\u963B\u585E\uFF0C\u53E6\u5916\uFF0C\u5982\u679C\u88AB\u963B\u585E\u7684\u7EBF\u7A0B\u8D85\u8FC7\u4E86\u7ED9\u5B9A\u7684\u65F6\u957F\uFF0C\u8BE5\u7EBF\u7A0B\u4F1A\u9000\u51FA</li></ol><h2 id="\u5E38\u7528\u7684blockingqueue" tabindex="-1"><a class="header-anchor" href="#\u5E38\u7528\u7684blockingqueue" aria-hidden="true">#</a> \u5E38\u7528\u7684BlockingQueue</h2><p>\u5B9E\u73B0BlockingQueue\u63A5\u53E3\u7684\u6709<code>ArrayBlockingQueue, DelayQueue, LinkedBlockingDeque, LinkedBlockingQueue, LinkedTransferQueue, PriorityBlockingQueue, SynchronousQueue</code>\uFF0C\u800C\u8FD9\u51E0\u79CD\u5E38\u89C1\u7684\u963B\u585E\u961F\u5217\u4E5F\u662F\u5728\u5B9E\u9645\u7F16\u7A0B\u4E2D\u4F1A\u5E38\u7528\u7684\uFF0C\u4E0B\u9762\u5BF9\u8FD9\u51E0\u79CD\u5E38\u89C1\u7684\u963B\u585E\u961F\u5217\u8FDB\u884C\u8BF4\u660E\uFF1A</p><h3 id="arrayblockingqueue" tabindex="-1"><a class="header-anchor" href="#arrayblockingqueue" aria-hidden="true">#</a> ArrayBlockingQueue</h3><p><strong>ArrayBlockingQueue</strong>\u662F\u7531\u6570\u7EC4\u5B9E\u73B0\u7684\u6709\u754C\u963B\u585E\u961F\u5217\u3002\u8BE5\u961F\u5217\u547D\u4EE4\u5143\u7D20FIFO\uFF08\u5148\u8FDB\u5148\u51FA\uFF09\u3002\u56E0\u6B64\uFF0C\u5BF9\u5934\u5143\u7D20\u65F6\u961F\u5217\u4E2D\u5B58\u5728\u65F6\u95F4\u6700\u957F\u7684\u6570\u636E\u5143\u7D20\uFF0C\u800C\u5BF9\u5C3E\u6570\u636E\u5219\u662F\u5F53\u524D\u961F\u5217\u6700\u65B0\u7684\u6570\u636E\u5143\u7D20\u3002ArrayBlockingQueue\u53EF\u4F5C\u4E3A\u201C\u6709\u754C\u6570\u636E\u7F13\u51B2\u533A\u201D\uFF0C\u751F\u4EA7\u8005\u63D2\u5165\u6570\u636E\u5230\u961F\u5217\u5BB9\u5668\u4E2D\uFF0C\u5E76\u7531\u6D88\u8D39\u8005\u63D0\u53D6\u3002ArrayBlockingQueue\u4E00\u65E6\u521B\u5EFA\uFF0C\u5BB9\u91CF\u4E0D\u80FD\u6539\u53D8\u3002</p><p>\u5F53\u961F\u5217\u5BB9\u91CF\u6EE1\u65F6\uFF0C\u5C1D\u8BD5\u5C06\u5143\u7D20\u653E\u5165\u961F\u5217\u5C06\u5BFC\u81F4\u64CD\u4F5C\u963B\u585E;\u5C1D\u8BD5\u4ECE\u4E00\u4E2A\u7A7A\u961F\u5217\u4E2D\u53D6\u4E00\u4E2A\u5143\u7D20\u4E5F\u4F1A\u540C\u6837\u963B\u585E\u3002</p><p>ArrayBlockingQueue\u9ED8\u8BA4\u60C5\u51B5\u4E0B\u4E0D\u80FD\u4FDD\u8BC1\u7EBF\u7A0B\u8BBF\u95EE\u961F\u5217\u7684\u516C\u5E73\u6027\uFF0C\u6240\u8C13\u516C\u5E73\u6027\u662F\u6307\u4E25\u683C\u6309\u7167\u7EBF\u7A0B\u7B49\u5F85\u7684\u7EDD\u5BF9\u65F6\u95F4\u987A\u5E8F\uFF0C\u5373\u6700\u5148\u7B49\u5F85\u7684\u7EBF\u7A0B\u80FD\u591F\u6700\u5148\u8BBF\u95EE\u5230ArrayBlockingQueue\u3002\u800C\u975E\u516C\u5E73\u6027\u5219\u662F\u6307\u8BBF\u95EEArrayBlockingQueue\u7684\u987A\u5E8F\u4E0D\u662F\u9075\u5B88\u4E25\u683C\u7684\u65F6\u95F4\u987A\u5E8F\uFF0C\u6709\u53EF\u80FD\u5B58\u5728\uFF0C\u4E00\u65E6ArrayBlockingQueue\u53EF\u4EE5\u88AB\u8BBF\u95EE\u65F6\uFF0C\u957F\u65F6\u95F4\u963B\u585E\u7684\u7EBF\u7A0B\u4F9D\u7136\u65E0\u6CD5\u8BBF\u95EE\u5230ArrayBlockingQueue\u3002<strong>\u5982\u679C\u4FDD\u8BC1\u516C\u5E73\u6027\uFF0C\u901A\u5E38\u4F1A\u964D\u4F4E\u541E\u5410\u91CF</strong>\u3002\u5982\u679C\u9700\u8981\u83B7\u5F97\u516C\u5E73\u6027\u7684ArrayBlockingQueue\uFF0C\u53EF\u91C7\u7528\u5982\u4E0B\u4EE3\u7801\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">private</span> <span class="token keyword">static</span> <span class="token class-name">ArrayBlockingQueue</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">Integer</span><span class="token punctuation">&gt;</span></span> blockingQueue <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">ArrayBlockingQueue</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">Integer</span><span class="token punctuation">&gt;</span></span><span class="token punctuation">(</span><span class="token number">10</span><span class="token punctuation">,</span><span class="token boolean">true</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>ArrayBlockingQueue\u7684\u4E3B\u8981\u5C5E\u6027\u5982\u4E0B:</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token doc-comment comment">/** The queued items */</span>
 <span class="token keyword">final</span> <span class="token class-name">Object</span><span class="token punctuation">[</span><span class="token punctuation">]</span> items<span class="token punctuation">;</span>
 
diff --git a/dist/assets/Chocolatey-Homebrew.html.a0b23720.js b/dist/assets/Chocolatey-Homebrew.html.5637171d.js
similarity index 99%
rename from dist/assets/Chocolatey-Homebrew.html.a0b23720.js
rename to dist/assets/Chocolatey-Homebrew.html.5637171d.js
index bb99f670..bee33e1a 100644
--- a/dist/assets/Chocolatey-Homebrew.html.a0b23720.js
+++ b/dist/assets/Chocolatey-Homebrew.html.5637171d.js
@@ -1,4 +1,4 @@
-import{_ as c}from"./plugin-vue_export-helper.21dcd24c.js";import{r as l,o as d,c as n,a as e,b as a,e as r,d as t}from"./app.a0271b9c.js";const i={},p=r('<p>\u5C0F\u4E8C\u662F\u516C\u53F8\u65B0\u6765\u7684\u5B9E\u4E60\u751F\uFF0C\u4E4B\u524D\u9762\u8BD5\u7684\u8FC7\u7A0B\u4E2D\u5BF9\u7B54\u5982\u6D41\uFF0C\u6240\u4EE5\u6211\u975E\u5E38\u770B\u597D\u4ED6\u3002\u7B2C\u4E00\u5929\uFF0C\u6211\u7ED9\u4ED6\u4E86\u4E00\u53F0\u65B0\u7535\u8111\uFF0C\u8981\u4ED6\u5148\u5728\u672C\u5730\u642D\u5EFA\u4E2A Java \u5F00\u53D1\u73AF\u5883\u3002</p><p>\u4E8C\u8BDD\u4E0D\u8BF4\uFF0C\u4ED6\u5C31\u5F00\u59CB\u9A6C\u4E0D\u505C\u8E44\u5730\u884C\u52A8\u4E86\u3002\u771F\u6CA1\u60F3\u5230\uFF0C\u4ED6\u7ADF\u7136\u662F\u901A\u8FC7\u547D\u4EE4\u884C\u7684\u65B9\u5F0F\u5B89\u88C5\u7684 JDK\uFF0C\u8FD9\u8FDC\u8FDC\u8D85\u51FA\u4E86\u6211\u5BF9\u4ED6\u7684\u9884\u671F\u3002</p><p>\u6211\u4EE5\u4E3A\uFF0C\u4ED6\u4F1A\u4F7F\u7528\u56FE\u5F62\u5316\u7684\u65B9\u5F0F\u6765\u5B89\u88C5 JDK \u7684\uFF0C\u5C31\u50CF\u8FD9\u6837\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/Chocolatey-Homebrew-3d58d8db-e851-4c3d-97a5-66c8bf94d420.png" alt=""></p><p>\u8FD8\u6709\u8FD9\u6837\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/Chocolatey-Homebrew-eda6f2a0-a192-4b92-b3cc-46f679ec5bcb.png" alt=""></p><p>\u7ED3\u679C\u4ED6\u662F\u8FD9\u6837\u7684\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/Chocolatey-Homebrew-371831e9-4580-4097-a0bf-d9c460f493fb.png" alt=""></p><p>\u5367\u69FD\uFF01\u725B\u903C\u9AD8\u5927\u4E0A\u554A\uFF01</p><p>\u770B\u7740\u4ED6\u719F\u7EC3\u5730\u5728\u547D\u4EE4\u884C\u91CC\u5B89\u88C5 JDK \u7684\u6837\u5B50\uFF0C\u6211\u7684\u5634\u89D2\u5F00\u59CB\u5FAE\u5FAE\u4E0A\u626C\uFF0C\u771F\u4E0D\u9519\uFF01\u8FD9\u6B21\u603B\u7B97\u62DB\u5230\u4E86\u4E00\u4E2A\u9760\u8C31\u7684\u3002</p><p>\u4E8E\u662F\u6211\u5C31\u5B89\u6392\u4ED6\u505A\u4E00\u4E2A\u8BB0\u5F55\uFF0C\u6253\u7B97\u53D1\u8868\u5728\u6211\u7684\u5C0F\u7834\u7AD9\u300AJava \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF\u300B\u4E0A\u3002\u4ECE\u4ED6\u5634\u91CC\u4E86\u89E3\u5230\uFF0C\u4ED6\u7528\u7684\u547D\u4EE4\u884C\u8F6F\u4EF6\u7BA1\u7406\u5668\u53EB chocolatey\uFF0C\u8FD9\u662F\u4E00\u4E2AWindows\u4E0B\u7684\u547D\u4EE4\u884C\u8F6F\u4EF6\u7BA1\u7406\u5668\uFF0C\u53EF\u4EE5\u65B9\u4FBF\u5F00\u53D1\u8005\u50CF\u5728Linux\u4E0B\u4F7F\u7528yum\u547D\u4EE4\u6765\u5B89\u88C5\u8F6F\u4EF6\uFF0C\u6216\u8005\u50CF\u5728macOS\u4E0B\u4F7F\u7528brew \u547D\u4EE4\u6765\u5B89\u88C5\u8F6F\u4EF6\uFF0C\u6211\u611F\u89C9\u975E\u5E38\u9177\u70AB\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/Chocolatey-Homebrew-509ea602-39b0-462e-9b8d-2a55fc31a4c8.png" alt=""></p><p>\u4EE5\u4E0B\u662F\u4ED6\u7684\u8BB0\u5F55\uFF0C\u4E00\u8D77\u6765\u6B23\u8D4F\u4E0B\u3002</p><h3 id="\u5173\u4E8Eshell" tabindex="-1"><a class="header-anchor" href="#\u5173\u4E8Eshell" aria-hidden="true">#</a> \u5173\u4E8Eshell</h3><p>\u5BF9\u4E8E\u4E00\u540D Java \u540E\u7AEF\u7A0B\u5E8F\u5458\u6765\u8BF4\uFF0C\u521D\u5B66\u9636\u6BB5\uFF0C\u4F60\u53EF\u4EE5\u9009\u62E9\u5728 IDE \u4E2D\u76F4\u63A5\u7F16\u8BD1\u8FD0\u884C Java \u4EE3\u7801\uFF0C\u4F46\u6709\u65F6\u5019\u4E5F\u9700\u8981\u5728 Shell \u4E0B\u7F16\u8BD1\u548C\u8FD0\u884C Java \u4EE3\u7801\u3002</p><blockquote><p>Windows \u4E0B\u81EA\u5E26\u7684 Shell \u53EB\u547D\u4EE4\u63D0\u793A\u7B26\uFF0C\u6216\u8005 cmd \u6216\u8005 powershell\uFF0CmacOS \u4E0B\u53EB\u7EC8\u7AEF terminal\u3002</p></blockquote>',16),s={href:"https://mp.weixin.qq.com/s?__biz=MzIxNzQwNjM3NA==&mid=2247491253&idx=1&sn=9a46879174f7240267fe5b5205d16d22&scene=21#wechat_redirect",target:"_blank",rel:"noopener noreferrer"},b=t("\u7EC8\u7AEF\u4E0E Shell \u7684\u533A\u522B"),h={href:"https://mp.weixin.qq.com/s/oEo8N3nE0wR1zl7qD4nh3w",target:"_blank",rel:"noopener noreferrer"},m=t("\u521D\u6B21\u4F53\u9A8C macOS \u4E0B\u7684 Shell"),g=r('<p>\u4F46\u5F53\u4F60\u9700\u8981\u5728\u751F\u4EA7\u73AF\u5883\u4E0B\u90E8\u7F72 Java\u9879\u76EE\u6216\u8005\u67E5\u770B\u65E5\u5FD7\u7684\u8BDD\uFF0C\u5C31\u5FC5\u7136\u4F1A\u7528\u5230 Shell\uFF0C\u8FD9\u4E2A\u9636\u6BB5\uFF0CShell \u7684\u4F7F\u7528\u9891\u7387\u9AD8\u5230\u53EF\u4EE5\u7528\u4E00\u4E2A\u6210\u8BED\u6765\u5F62\u5BB9\u2014\u2014\u671D\u5915\u76F8\u4F34\u3002</p><p>\u4E00\u4E9B\u7B2C\u4E09\u65B9\u8F6F\u4EF6\u4F1A\u5728\u539F\u751F\u7684 Shell \u57FA\u7840\u4E0A\u63D0\u4F9B\u66F4\u5F3A\u5927\u7684\u529F\u80FD\uFF0C\u5E38\u89C1\u7684\u6709 tabby\u3001Warp\u3001xhsell\u3001FinalShell\u3001MobaXterm\u3001Aechoterm\u3001WindTerm\u3001termius\u3001iterm2 \u7B49\u7B49\uFF0C\u6709\u4E9B\u53EA\u80FD\u5728 Windows \u4E0A\u4F7F\u7528\uFF0C\u6709\u4E9B\u53EA\u80FD\u5728 macOS \u4E0A\u4F7F\u7528\uFF0C\u6709\u4E9B\u652F\u6301\u5168\u5E73\u53F0\u3002\u8FD8\u6709 ohmyzsh \u8FD9\u79CD\u8D85\u795E\u7684 Shell \u7F8E\u5316\u5DE5\u5177\u3002</p><p>\u8FD9\u91CC\uFF0C\u6211\u4EEC\u5217\u4E3E\u4E00\u4E9B Shell \u7684\u57FA\u672C\u64CD\u4F5C\u547D\u4EE4\uFF08Windows \u548C macOS/Linux \u6709\u4E9B\u8BB8\u5DEE\u5F02\uFF09\uFF1A</p><ul><li>\u5207\u6362\u76EE\u5F55\uFF0C\u53EF\u4EE5\u4F7F\u7528 cd \u547D\u4EE4\u5207\u6362\u76EE\u5F55\uFF0C<code>cd ..</code> \u8FD4\u56DE\u4E0A\u7EA7\u76EE\u5F55\u3002</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/Chocolatey-Homebrew-d4f0634f-7b5b-4bbd-97eb-74ec1fe059c5.png" alt=""></p><ul><li>\u76EE\u5F55\u5217\u8868\uFF0Cmacos/linux \u4E0B\u53EF\u4EE5\u4F7F\u7528 ls \u547D\u4EE4\u5217\u51FA\u76EE\u5F55\u4E0B\u6240\u6709\u7684\u6587\u4EF6\u548C\u5B50\u76EE\u5F55\uFF08Windows \u4E0B\u4F7F\u7528 dir \u547D\u4EE4\uFF09\uFF0C\u4F7F\u7528\u901A\u914D\u7B26 <code>*</code> \u5BF9\u5C55\u793A\u7684\u5185\u5BB9\u8FDB\u884C\u8FC7\u6EE4\uFF0C\u6BD4\u5982 <code>ls *.java</code> \u5217\u51FA\u6240\u6709 <code>.java</code>\u540E\u7F00\u7684\u6587\u4EF6\uFF0C\u5982\u679C\u60F3\u66F4\u8FDB\u4E00\u6B65\u7684\u8BDD\uFF0C\u53EF\u4EE5\u4F7F\u7528 <code>ls H*.java</code> \u5217\u51FA\u6240\u6709\u4EE5 H \u5F00\u5934 <code>.java</code> \u540E\u7F00\u7684\u6587\u4EF6\u3002</li><li>\u65B0\u5EFA\u76EE\u5F55\uFF0CmacOS/Linux \u4E0B\u53EF\u4EE5\u4F7F\u7528 mkdir \u547D\u4EE4\u65B0\u5EFA\u4E00\u4E2A\u76EE\u5F55\uFF08\u6BD4\u5982 <code>mkdir hello</code> \u53EF\u4EE5\u65B0\u5EFA\u4E00\u4E2A hello \u7684\u76EE\u5F55\uFF09\uFF0CWindows \u4E0B\u53EF\u4EE5\u4F7F\u7528 md \u547D\u4EE4\u3002</li><li>\u5220\u9664\u6587\u4EF6\uFF0CmacOS/Linux \u4E0B\u53EF\u4EE5\u4F7F\u7528 <code>rm</code> \u547D\u4EE4\u5220\u9664\u6587\u4EF6\uFF08\u6BD4\u5982 <code>rm hello.java</code> \u5220\u9664 hello.java \u6587\u4EF6\uFF09\uFF0CWindows \u4E0B\u53EF\u4EE5\u4F7F\u7528 del \u547D\u4EE4\u3002</li><li>\u5220\u9664\u76EE\u5F55\uFF0CmacOS/Linux \u4E0B\u53EF\u4EE5\u4F7F\u7528 <code>rm -r</code> \u547D\u4EE4\u5220\u9664\u76EE\u5F55\u4EE5\u53CA\u5B83\u6240\u5305\u542B\u7684\u6240\u6709\u6587\u4EF6\uFF08\u6BD4\u5982\u8BF4 <code>rm -r hello</code> \u5220\u9664 hello \u76EE\u5F55\uFF09\u3002Windows \u4E0B\u53EF\u4EE5\u4F7F\u7528 deltree \u547D\u4EE4\u3002</li><li>\u91CD\u590D\u547D\u4EE4\uFF0CmacOS/Linux/Windows \u4E0B\u90FD\u53EF\u4EE5\u4F7F\u7528\u4E0A\u4E0B\u7BAD\u5934\u6765\u9009\u62E9\u4EE5\u5F80\u6267\u884C\u8FC7\u7684\u547D\u4EE4\u3002</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/Chocolatey-Homebrew-738501d4-c210-449c-9d6c-56d5d16c623b.png" alt=""></p><ul><li>\u547D\u4EE4\u5386\u53F2\uFF0CmacOS/Linux \u4E0B\u53EF\u4EE5\u4F7F\u7528 <code>history</code> \u547D\u4EE4\u67E5\u770B\u6240\u6709\u4F7F\u7528\u8FC7\u7684\u547D\u4EE4\u3002Windows \u53EF\u4EE5\u6309\u4E0B F7 \u952E\u3002</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/Chocolatey-Homebrew-e90c8f1f-c46c-47da-be88-0e8a00d85089.png" alt=""></p><ul><li>\u89E3\u538B\u6587\u4EF6\uFF0C\u540E\u7F00\u540D\u4E3A\u201C.zip\u201D\u7684\u6587\u4EF6\u662F\u4E00\u4E2A\u5305\u542B\u4E86\u5176\u4ED6\u6587\u4EF6\u7684\u538B\u7F29\u5305\uFF0CmacOS/Linux \u7CFB\u7EDF\u81EA\u8EAB\u5DF2\u7ECF\u63D0\u4F9B\u4E86\u7528\u4E8E\u89E3\u538B\u7684 unzip \u547D\u4EE4\uFF0C Windows \u7684\u8BDD\u9700\u8981\u624B\u52A8\u5B89\u88C5\u3002</li></ul><h3 id="\u5B89\u88C5jdk" tabindex="-1"><a class="header-anchor" href="#\u5B89\u88C5jdk" aria-hidden="true">#</a> \u5B89\u88C5JDK</h3><p><strong>1\uFF09Windows</strong></p><p>\u63A8\u8350\u5148\u5B89\u88C5 chocolatey\u3002\u8FD9\u662F\u4E00\u4E2AWindows\u4E0B\u7684\u547D\u4EE4\u884C\u8F6F\u4EF6\u7BA1\u7406\u5668\uFF0C\u53EF\u4EE5\u65B9\u4FBF\u5F00\u53D1\u8005\u50CF\u5728Linux\u4E0B\u4F7F\u7528yum\u547D\u4EE4\u6765\u5B89\u88C5\u8F6F\u4EF6\uFF0C\u6216\u8005\u50CF\u5728macOS\u4E0B\u4F7F\u7528brew \u547D\u4EE4\u6765\u5B89\u88C5\u8F6F\u4EF6\uFF0C\u975E\u5E38\u9177\u70AB\u3002</p><blockquote><p>The biggest challenge is reducing duplication of effort, so users turn to Chocolatey for simplicity</p></blockquote><p>\u4F20\u7EDF\u7684\u5B89\u88C5\u65B9\u5F0F\u8981\u4E48\u975E\u5E38\u8017\u65F6\uFF0C\u8981\u4E48\u975E\u5E38\u4F4E\u6548\uFF0C\u5728\u547D\u4EE4\u884C\u5B89\u88C5\u8F6F\u4EF6\u9664\u4E86\u7B80\u5355\u9AD8\u6548\uFF0C\u8FD8\u80FD\u81EA\u52A8\u5E2E\u6211\u4EEC\u914D\u7F6E\u73AF\u5883\u53D8\u91CF\u3002</p>',15),u=t("\u5B98\u65B9\u5730\u5740\uFF1A"),v={href:"https://chocolatey.org/",target:"_blank",rel:"noopener noreferrer"},w=t("https://chocolatey.org/"),_=t("\u5B89\u88C5\u6587\u6863\uFF1A"),j={href:"https://chocolatey.org/install#individual",target:"_blank",rel:"noopener noreferrer"},x=t("https://chocolatey.org/install#individual"),f=r('<p>\u5B89\u88C5\u5B8C\u6210\u540E\u5982\u4E0B\u56FE\u6240\u793A\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/Chocolatey-Homebrew-5fd2b098-5685-49be-b424-f13ac288858d.png" alt=""></p><p>\u5982\u679C\u4E0D\u786E\u5B9A\u662F\u5426\u5B89\u88C5\u6210\u529F\u7684\u8BDD\uFF0C\u53EF\u4EE5\u901A\u8FC7\u952E\u5165 <code>choco</code> \u547D\u4EE4\u6765\u786E\u8BA4\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/Chocolatey-Homebrew-a7ea03ef-aa60-47a8-adfc-8b6dde1cf4cc.png" alt=""></p><p>\u8FD9\u91CC\u63A8\u8350\u51E0\u4E2A\u975E\u5E38\u9AD8\u6548\u7684\u64CD\u4F5C\u547D\u4EE4\uFF1A</p><ul><li>choco search xxx\uFF0C\u67E5\u627E xxx \u5B89\u88C5\u5305</li><li>choco info xxx\uFF0C\u67E5\u770B xxx \u5B89\u88C5\u5305\u4FE1\u606F</li><li>choco install xxx\uFF0C\u5B89\u88C5 xxx \u8F6F\u4EF6</li><li>choco upgrade xxx\uFF0C\u5347\u7EA7 xxx \u8F6F\u4EF6</li><li>choco uninstall xxx\uFF0C \u5378\u8F7D xxx \u8F6F\u4EF6</li></ul><p>\u5982\u4F55\u77E5\u9053 chocolatey \u4ED3\u5E93\u4E2D\u90FD\u6709\u54EA\u4E9B\u5B89\u88C5\u5305\u53EF\u7528\u5462\uFF1F</p><p>\u53EF\u4EE5\u901A\u8FC7\u4E0A\u9762\u63D0\u5230\u7684\u547D\u4EE4\u884C\u7684\u65B9\u5F0F\uFF0C\u4E5F\u53EF\u4EE5\u8BBF\u95EE\u5B98\u65B9\u4ED3\u5E93\u8FDB\u884C\u7B5B\u9009\u3002</p>',8),k={href:"https://community.chocolatey.org/packages",target:"_blank",rel:"noopener noreferrer"},y=t("https://community.chocolatey.org/packages"),S=r('<p>\u6BD4\u5982\u8BF4\u6211\u4EEC\u6765\u67E5\u627E Java\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/Chocolatey-Homebrew-a5d6ff0f-f36d-4eb0-a69e-2ba30dd315ea.png" alt=""></p><p>\u597D\uFF0C\u73B0\u5728\u53EF\u4EE5\u76F4\u63A5\u5728shell\u4E2D\u952E\u5165 <code>choco install jdk8</code> \u6765\u5B89\u88C5 JDK8 \u4E86\uFF0C\u5E76\u4E14\u4F1A\u81EA\u52A8\u5C06Java\u52A0\u5165\u5230\u73AF\u5883\u53D8\u91CF\u4E2D\uFF0C\u4E0D\u7528\u518D\u53BB\u300C\u6211\u7684\u7535\u8111\u300D\u300C\u73AF\u5883\u53D8\u91CF\u300D\u4E2D\u65B0\u5EFA JAVA_HOME \u5E76\u590D\u5236 JDK \u5B89\u88C5\u8DEF\u5F84\u914D\u7F6E PATH \u53D8\u91CF\u4E86\uFF0C\u662F\u4E0D\u662F\u975E\u5E38 nice\uFF1F</p><p>\u7A0D\u7B49\u7247\u523B\uFF0C\u952E\u5165 <code>java -version</code> \u5C31\u53EF\u4EE5\u786E\u8BA4Java\u662F\u5426\u5B89\u88C5\u6210\u529F\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/Chocolatey-Homebrew-31441e14-b692-4abc-8640-a8b70e08dfae.png" alt=""></p><p>\u4E0D\u5F97\u4E0D\u627F\u8BA4\uFF01\u975E\u5E38nice\uFF01</p><p><strong>2\uFF09macOS</strong></p><p>\u9996\u5148\u63A8\u8350\u5B89\u88C5 homebrew\uFF0C\u8FD9\u662FmacOS\u4E0B\u7684\u547D\u4EE4\u884C\u8F6F\u4EF6\u7BA1\u7406\u5668\uFF0C\u7528\u6765\u7B80\u5316 macOS \u4E0A\u8F6F\u4EF6\u7684\u5B89\u88C5\u8FC7\u7A0B\u3002homebrew \u662F\u5F00\u6E90\u7684\uFF0C\u5728 GitHub \u5DF2\u6536\u83B7 32k star\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/Chocolatey-Homebrew-0f9c86a0-e4b2-4103-a77e-8771ab8253f5.png" alt=""></p><p>homebrew \u7684\u5B89\u88C5\u4E5F\u975E\u5E38\u7684\u7B80\u5355\uFF0C\u53EA\u9700\u8981\u4E00\u884C\u547D\u4EE4\u5373\u53EF\u3002</p>',10),H=t("\u5B98\u65B9\u7F51\u5740\uFF1A"),J={href:"https://brew.sh/index_zh-cn",target:"_blank",rel:"noopener noreferrer"},C=t("https://brew.sh/index_zh-cn"),O=r(`<p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/Chocolatey-Homebrew-b1e8ea1c-2aec-4f79-bdc8-eb3e4fe1a0f0.png" alt=""></p><ul><li>\u4F7F\u7528 <code>brew install xxx</code> \u53EF\u4EE5\u5B89\u88C5 macOS \u4E0A\u6CA1\u6709\u9884\u88C5\u7684\u8F6F\u4EF6</li><li>\u4F7F\u7528 <code>brew install --cask yyy</code> \u53EF\u4EE5\u5B89\u88C5 macOS \u5176\u4ED6\u975E\u5F00\u6E90\u8F6F\u4EF6\u3002</li></ul><p>\u8FD9\u91CC\u662F homebrew \u5E38\u7528\u547D\u4EE4\u7684\u4E00\u4E2A\u6E05\u5355\uFF0C\u53EF\u4F9B\u53C2\u8003\u3002</p><table><thead><tr><th>\u547D\u4EE4</th><th>\u63CF\u8FF0</th></tr></thead><tbody><tr><td>brew update</td><td>\u66F4\u65B0 Homebrew</td></tr><tr><td>brew search package</td><td>\u641C\u7D22\u8F6F\u4EF6\u5305</td></tr><tr><td>brew install package</td><td>\u5B89\u88C5\u8F6F\u4EF6\u5305</td></tr><tr><td>brew uninstall package</td><td>\u5378\u8F7D\u8F6F\u4EF6\u5305</td></tr><tr><td>brew upgrade</td><td>\u5347\u7EA7\u6240\u6709\u8F6F\u4EF6\u5305</td></tr><tr><td>brew upgrade package</td><td>\u5347\u7EA7\u6307\u5B9A\u8F6F\u4EF6\u5305</td></tr><tr><td>brew list</td><td>\u5217\u51FA\u5DF2\u5B89\u88C5\u7684\u8F6F\u4EF6\u5305\u5217\u8868</td></tr><tr><td>brew services command package</td><td>\u7BA1\u7406 brew \u5B89\u88C5\u8F6F\u4EF6\u5305</td></tr><tr><td>brew services list</td><td>\u5217\u51FA brew \u7BA1\u7406\u8FD0\u884C\u7684\u670D\u52A1</td></tr><tr><td>brew info package</td><td>\u67E5\u770B\u8F6F\u4EF6\u5305\u4FE1\u606F</td></tr><tr><td>brew deps package</td><td>\u5217\u51FA\u8F6F\u4EF6\u5305\u7684\u4F9D\u8D56\u5173\u7CFB</td></tr><tr><td>brew help</td><td>\u67E5\u770B\u5E2E\u52A9</td></tr><tr><td>brew cleanup</td><td>\u6E05\u9664\u8FC7\u65F6\u8F6F\u4EF6\u5305</td></tr><tr><td>brew link package</td><td>\u521B\u5EFA\u8F6F\u4EF6\u5305\u7B26\u53F7\u94FE\u63A5</td></tr><tr><td>brew unlink package</td><td>\u53D6\u6D88\u8F6F\u4EF6\u5305\u7B26\u53F7\u94FE\u63A5</td></tr><tr><td>brew doctor</td><td>\u68C0\u67E5\u7CFB\u7EDF\u662F\u5426\u5B58\u5728\u95EE\u9898</td></tr></tbody></table><p>\u5B89\u88C5\u5B8C homebrew \u540E\uFF0C\u5EFA\u8BAE\u66FF\u6362homebrew \u7684\u9ED8\u8BA4\u6E90\u4E3A\u4E2D\u79D1\u5927\u7684\uFF0C\u539F\u56E0\u5C31\u4E0D\u7528\u6211\u591A\u8BF4\u4E86\u5427\uFF1F\u66FF\u6362\u65B9\u6CD5\u5982\u4E0B\u6240\u793A\uFF1A</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>\u66FF\u6362brew.git:
+import{_ as c}from"./plugin-vue_export-helper.21dcd24c.js";import{r as l,o as d,c as n,a as e,b as a,e as r,d as t}from"./app.615e41d8.js";const i={},p=r('<p>\u5C0F\u4E8C\u662F\u516C\u53F8\u65B0\u6765\u7684\u5B9E\u4E60\u751F\uFF0C\u4E4B\u524D\u9762\u8BD5\u7684\u8FC7\u7A0B\u4E2D\u5BF9\u7B54\u5982\u6D41\uFF0C\u6240\u4EE5\u6211\u975E\u5E38\u770B\u597D\u4ED6\u3002\u7B2C\u4E00\u5929\uFF0C\u6211\u7ED9\u4ED6\u4E86\u4E00\u53F0\u65B0\u7535\u8111\uFF0C\u8981\u4ED6\u5148\u5728\u672C\u5730\u642D\u5EFA\u4E2A Java \u5F00\u53D1\u73AF\u5883\u3002</p><p>\u4E8C\u8BDD\u4E0D\u8BF4\uFF0C\u4ED6\u5C31\u5F00\u59CB\u9A6C\u4E0D\u505C\u8E44\u5730\u884C\u52A8\u4E86\u3002\u771F\u6CA1\u60F3\u5230\uFF0C\u4ED6\u7ADF\u7136\u662F\u901A\u8FC7\u547D\u4EE4\u884C\u7684\u65B9\u5F0F\u5B89\u88C5\u7684 JDK\uFF0C\u8FD9\u8FDC\u8FDC\u8D85\u51FA\u4E86\u6211\u5BF9\u4ED6\u7684\u9884\u671F\u3002</p><p>\u6211\u4EE5\u4E3A\uFF0C\u4ED6\u4F1A\u4F7F\u7528\u56FE\u5F62\u5316\u7684\u65B9\u5F0F\u6765\u5B89\u88C5 JDK \u7684\uFF0C\u5C31\u50CF\u8FD9\u6837\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/Chocolatey-Homebrew-3d58d8db-e851-4c3d-97a5-66c8bf94d420.png" alt=""></p><p>\u8FD8\u6709\u8FD9\u6837\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/Chocolatey-Homebrew-eda6f2a0-a192-4b92-b3cc-46f679ec5bcb.png" alt=""></p><p>\u7ED3\u679C\u4ED6\u662F\u8FD9\u6837\u7684\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/Chocolatey-Homebrew-371831e9-4580-4097-a0bf-d9c460f493fb.png" alt=""></p><p>\u5367\u69FD\uFF01\u725B\u903C\u9AD8\u5927\u4E0A\u554A\uFF01</p><p>\u770B\u7740\u4ED6\u719F\u7EC3\u5730\u5728\u547D\u4EE4\u884C\u91CC\u5B89\u88C5 JDK \u7684\u6837\u5B50\uFF0C\u6211\u7684\u5634\u89D2\u5F00\u59CB\u5FAE\u5FAE\u4E0A\u626C\uFF0C\u771F\u4E0D\u9519\uFF01\u8FD9\u6B21\u603B\u7B97\u62DB\u5230\u4E86\u4E00\u4E2A\u9760\u8C31\u7684\u3002</p><p>\u4E8E\u662F\u6211\u5C31\u5B89\u6392\u4ED6\u505A\u4E00\u4E2A\u8BB0\u5F55\uFF0C\u6253\u7B97\u53D1\u8868\u5728\u6211\u7684\u5C0F\u7834\u7AD9\u300AJava \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF\u300B\u4E0A\u3002\u4ECE\u4ED6\u5634\u91CC\u4E86\u89E3\u5230\uFF0C\u4ED6\u7528\u7684\u547D\u4EE4\u884C\u8F6F\u4EF6\u7BA1\u7406\u5668\u53EB chocolatey\uFF0C\u8FD9\u662F\u4E00\u4E2AWindows\u4E0B\u7684\u547D\u4EE4\u884C\u8F6F\u4EF6\u7BA1\u7406\u5668\uFF0C\u53EF\u4EE5\u65B9\u4FBF\u5F00\u53D1\u8005\u50CF\u5728Linux\u4E0B\u4F7F\u7528yum\u547D\u4EE4\u6765\u5B89\u88C5\u8F6F\u4EF6\uFF0C\u6216\u8005\u50CF\u5728macOS\u4E0B\u4F7F\u7528brew \u547D\u4EE4\u6765\u5B89\u88C5\u8F6F\u4EF6\uFF0C\u6211\u611F\u89C9\u975E\u5E38\u9177\u70AB\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/Chocolatey-Homebrew-509ea602-39b0-462e-9b8d-2a55fc31a4c8.png" alt=""></p><p>\u4EE5\u4E0B\u662F\u4ED6\u7684\u8BB0\u5F55\uFF0C\u4E00\u8D77\u6765\u6B23\u8D4F\u4E0B\u3002</p><h3 id="\u5173\u4E8Eshell" tabindex="-1"><a class="header-anchor" href="#\u5173\u4E8Eshell" aria-hidden="true">#</a> \u5173\u4E8Eshell</h3><p>\u5BF9\u4E8E\u4E00\u540D Java \u540E\u7AEF\u7A0B\u5E8F\u5458\u6765\u8BF4\uFF0C\u521D\u5B66\u9636\u6BB5\uFF0C\u4F60\u53EF\u4EE5\u9009\u62E9\u5728 IDE \u4E2D\u76F4\u63A5\u7F16\u8BD1\u8FD0\u884C Java \u4EE3\u7801\uFF0C\u4F46\u6709\u65F6\u5019\u4E5F\u9700\u8981\u5728 Shell \u4E0B\u7F16\u8BD1\u548C\u8FD0\u884C Java \u4EE3\u7801\u3002</p><blockquote><p>Windows \u4E0B\u81EA\u5E26\u7684 Shell \u53EB\u547D\u4EE4\u63D0\u793A\u7B26\uFF0C\u6216\u8005 cmd \u6216\u8005 powershell\uFF0CmacOS \u4E0B\u53EB\u7EC8\u7AEF terminal\u3002</p></blockquote>',16),s={href:"https://mp.weixin.qq.com/s?__biz=MzIxNzQwNjM3NA==&mid=2247491253&idx=1&sn=9a46879174f7240267fe5b5205d16d22&scene=21#wechat_redirect",target:"_blank",rel:"noopener noreferrer"},b=t("\u7EC8\u7AEF\u4E0E Shell \u7684\u533A\u522B"),h={href:"https://mp.weixin.qq.com/s/oEo8N3nE0wR1zl7qD4nh3w",target:"_blank",rel:"noopener noreferrer"},m=t("\u521D\u6B21\u4F53\u9A8C macOS \u4E0B\u7684 Shell"),g=r('<p>\u4F46\u5F53\u4F60\u9700\u8981\u5728\u751F\u4EA7\u73AF\u5883\u4E0B\u90E8\u7F72 Java\u9879\u76EE\u6216\u8005\u67E5\u770B\u65E5\u5FD7\u7684\u8BDD\uFF0C\u5C31\u5FC5\u7136\u4F1A\u7528\u5230 Shell\uFF0C\u8FD9\u4E2A\u9636\u6BB5\uFF0CShell \u7684\u4F7F\u7528\u9891\u7387\u9AD8\u5230\u53EF\u4EE5\u7528\u4E00\u4E2A\u6210\u8BED\u6765\u5F62\u5BB9\u2014\u2014\u671D\u5915\u76F8\u4F34\u3002</p><p>\u4E00\u4E9B\u7B2C\u4E09\u65B9\u8F6F\u4EF6\u4F1A\u5728\u539F\u751F\u7684 Shell \u57FA\u7840\u4E0A\u63D0\u4F9B\u66F4\u5F3A\u5927\u7684\u529F\u80FD\uFF0C\u5E38\u89C1\u7684\u6709 tabby\u3001Warp\u3001xhsell\u3001FinalShell\u3001MobaXterm\u3001Aechoterm\u3001WindTerm\u3001termius\u3001iterm2 \u7B49\u7B49\uFF0C\u6709\u4E9B\u53EA\u80FD\u5728 Windows \u4E0A\u4F7F\u7528\uFF0C\u6709\u4E9B\u53EA\u80FD\u5728 macOS \u4E0A\u4F7F\u7528\uFF0C\u6709\u4E9B\u652F\u6301\u5168\u5E73\u53F0\u3002\u8FD8\u6709 ohmyzsh \u8FD9\u79CD\u8D85\u795E\u7684 Shell \u7F8E\u5316\u5DE5\u5177\u3002</p><p>\u8FD9\u91CC\uFF0C\u6211\u4EEC\u5217\u4E3E\u4E00\u4E9B Shell \u7684\u57FA\u672C\u64CD\u4F5C\u547D\u4EE4\uFF08Windows \u548C macOS/Linux \u6709\u4E9B\u8BB8\u5DEE\u5F02\uFF09\uFF1A</p><ul><li>\u5207\u6362\u76EE\u5F55\uFF0C\u53EF\u4EE5\u4F7F\u7528 cd \u547D\u4EE4\u5207\u6362\u76EE\u5F55\uFF0C<code>cd ..</code> \u8FD4\u56DE\u4E0A\u7EA7\u76EE\u5F55\u3002</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/Chocolatey-Homebrew-d4f0634f-7b5b-4bbd-97eb-74ec1fe059c5.png" alt=""></p><ul><li>\u76EE\u5F55\u5217\u8868\uFF0Cmacos/linux \u4E0B\u53EF\u4EE5\u4F7F\u7528 ls \u547D\u4EE4\u5217\u51FA\u76EE\u5F55\u4E0B\u6240\u6709\u7684\u6587\u4EF6\u548C\u5B50\u76EE\u5F55\uFF08Windows \u4E0B\u4F7F\u7528 dir \u547D\u4EE4\uFF09\uFF0C\u4F7F\u7528\u901A\u914D\u7B26 <code>*</code> \u5BF9\u5C55\u793A\u7684\u5185\u5BB9\u8FDB\u884C\u8FC7\u6EE4\uFF0C\u6BD4\u5982 <code>ls *.java</code> \u5217\u51FA\u6240\u6709 <code>.java</code>\u540E\u7F00\u7684\u6587\u4EF6\uFF0C\u5982\u679C\u60F3\u66F4\u8FDB\u4E00\u6B65\u7684\u8BDD\uFF0C\u53EF\u4EE5\u4F7F\u7528 <code>ls H*.java</code> \u5217\u51FA\u6240\u6709\u4EE5 H \u5F00\u5934 <code>.java</code> \u540E\u7F00\u7684\u6587\u4EF6\u3002</li><li>\u65B0\u5EFA\u76EE\u5F55\uFF0CmacOS/Linux \u4E0B\u53EF\u4EE5\u4F7F\u7528 mkdir \u547D\u4EE4\u65B0\u5EFA\u4E00\u4E2A\u76EE\u5F55\uFF08\u6BD4\u5982 <code>mkdir hello</code> \u53EF\u4EE5\u65B0\u5EFA\u4E00\u4E2A hello \u7684\u76EE\u5F55\uFF09\uFF0CWindows \u4E0B\u53EF\u4EE5\u4F7F\u7528 md \u547D\u4EE4\u3002</li><li>\u5220\u9664\u6587\u4EF6\uFF0CmacOS/Linux \u4E0B\u53EF\u4EE5\u4F7F\u7528 <code>rm</code> \u547D\u4EE4\u5220\u9664\u6587\u4EF6\uFF08\u6BD4\u5982 <code>rm hello.java</code> \u5220\u9664 hello.java \u6587\u4EF6\uFF09\uFF0CWindows \u4E0B\u53EF\u4EE5\u4F7F\u7528 del \u547D\u4EE4\u3002</li><li>\u5220\u9664\u76EE\u5F55\uFF0CmacOS/Linux \u4E0B\u53EF\u4EE5\u4F7F\u7528 <code>rm -r</code> \u547D\u4EE4\u5220\u9664\u76EE\u5F55\u4EE5\u53CA\u5B83\u6240\u5305\u542B\u7684\u6240\u6709\u6587\u4EF6\uFF08\u6BD4\u5982\u8BF4 <code>rm -r hello</code> \u5220\u9664 hello \u76EE\u5F55\uFF09\u3002Windows \u4E0B\u53EF\u4EE5\u4F7F\u7528 deltree \u547D\u4EE4\u3002</li><li>\u91CD\u590D\u547D\u4EE4\uFF0CmacOS/Linux/Windows \u4E0B\u90FD\u53EF\u4EE5\u4F7F\u7528\u4E0A\u4E0B\u7BAD\u5934\u6765\u9009\u62E9\u4EE5\u5F80\u6267\u884C\u8FC7\u7684\u547D\u4EE4\u3002</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/Chocolatey-Homebrew-738501d4-c210-449c-9d6c-56d5d16c623b.png" alt=""></p><ul><li>\u547D\u4EE4\u5386\u53F2\uFF0CmacOS/Linux \u4E0B\u53EF\u4EE5\u4F7F\u7528 <code>history</code> \u547D\u4EE4\u67E5\u770B\u6240\u6709\u4F7F\u7528\u8FC7\u7684\u547D\u4EE4\u3002Windows \u53EF\u4EE5\u6309\u4E0B F7 \u952E\u3002</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/Chocolatey-Homebrew-e90c8f1f-c46c-47da-be88-0e8a00d85089.png" alt=""></p><ul><li>\u89E3\u538B\u6587\u4EF6\uFF0C\u540E\u7F00\u540D\u4E3A\u201C.zip\u201D\u7684\u6587\u4EF6\u662F\u4E00\u4E2A\u5305\u542B\u4E86\u5176\u4ED6\u6587\u4EF6\u7684\u538B\u7F29\u5305\uFF0CmacOS/Linux \u7CFB\u7EDF\u81EA\u8EAB\u5DF2\u7ECF\u63D0\u4F9B\u4E86\u7528\u4E8E\u89E3\u538B\u7684 unzip \u547D\u4EE4\uFF0C Windows \u7684\u8BDD\u9700\u8981\u624B\u52A8\u5B89\u88C5\u3002</li></ul><h3 id="\u5B89\u88C5jdk" tabindex="-1"><a class="header-anchor" href="#\u5B89\u88C5jdk" aria-hidden="true">#</a> \u5B89\u88C5JDK</h3><p><strong>1\uFF09Windows</strong></p><p>\u63A8\u8350\u5148\u5B89\u88C5 chocolatey\u3002\u8FD9\u662F\u4E00\u4E2AWindows\u4E0B\u7684\u547D\u4EE4\u884C\u8F6F\u4EF6\u7BA1\u7406\u5668\uFF0C\u53EF\u4EE5\u65B9\u4FBF\u5F00\u53D1\u8005\u50CF\u5728Linux\u4E0B\u4F7F\u7528yum\u547D\u4EE4\u6765\u5B89\u88C5\u8F6F\u4EF6\uFF0C\u6216\u8005\u50CF\u5728macOS\u4E0B\u4F7F\u7528brew \u547D\u4EE4\u6765\u5B89\u88C5\u8F6F\u4EF6\uFF0C\u975E\u5E38\u9177\u70AB\u3002</p><blockquote><p>The biggest challenge is reducing duplication of effort, so users turn to Chocolatey for simplicity</p></blockquote><p>\u4F20\u7EDF\u7684\u5B89\u88C5\u65B9\u5F0F\u8981\u4E48\u975E\u5E38\u8017\u65F6\uFF0C\u8981\u4E48\u975E\u5E38\u4F4E\u6548\uFF0C\u5728\u547D\u4EE4\u884C\u5B89\u88C5\u8F6F\u4EF6\u9664\u4E86\u7B80\u5355\u9AD8\u6548\uFF0C\u8FD8\u80FD\u81EA\u52A8\u5E2E\u6211\u4EEC\u914D\u7F6E\u73AF\u5883\u53D8\u91CF\u3002</p>',15),u=t("\u5B98\u65B9\u5730\u5740\uFF1A"),v={href:"https://chocolatey.org/",target:"_blank",rel:"noopener noreferrer"},w=t("https://chocolatey.org/"),_=t("\u5B89\u88C5\u6587\u6863\uFF1A"),j={href:"https://chocolatey.org/install#individual",target:"_blank",rel:"noopener noreferrer"},x=t("https://chocolatey.org/install#individual"),f=r('<p>\u5B89\u88C5\u5B8C\u6210\u540E\u5982\u4E0B\u56FE\u6240\u793A\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/Chocolatey-Homebrew-5fd2b098-5685-49be-b424-f13ac288858d.png" alt=""></p><p>\u5982\u679C\u4E0D\u786E\u5B9A\u662F\u5426\u5B89\u88C5\u6210\u529F\u7684\u8BDD\uFF0C\u53EF\u4EE5\u901A\u8FC7\u952E\u5165 <code>choco</code> \u547D\u4EE4\u6765\u786E\u8BA4\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/Chocolatey-Homebrew-a7ea03ef-aa60-47a8-adfc-8b6dde1cf4cc.png" alt=""></p><p>\u8FD9\u91CC\u63A8\u8350\u51E0\u4E2A\u975E\u5E38\u9AD8\u6548\u7684\u64CD\u4F5C\u547D\u4EE4\uFF1A</p><ul><li>choco search xxx\uFF0C\u67E5\u627E xxx \u5B89\u88C5\u5305</li><li>choco info xxx\uFF0C\u67E5\u770B xxx \u5B89\u88C5\u5305\u4FE1\u606F</li><li>choco install xxx\uFF0C\u5B89\u88C5 xxx \u8F6F\u4EF6</li><li>choco upgrade xxx\uFF0C\u5347\u7EA7 xxx \u8F6F\u4EF6</li><li>choco uninstall xxx\uFF0C \u5378\u8F7D xxx \u8F6F\u4EF6</li></ul><p>\u5982\u4F55\u77E5\u9053 chocolatey \u4ED3\u5E93\u4E2D\u90FD\u6709\u54EA\u4E9B\u5B89\u88C5\u5305\u53EF\u7528\u5462\uFF1F</p><p>\u53EF\u4EE5\u901A\u8FC7\u4E0A\u9762\u63D0\u5230\u7684\u547D\u4EE4\u884C\u7684\u65B9\u5F0F\uFF0C\u4E5F\u53EF\u4EE5\u8BBF\u95EE\u5B98\u65B9\u4ED3\u5E93\u8FDB\u884C\u7B5B\u9009\u3002</p>',8),k={href:"https://community.chocolatey.org/packages",target:"_blank",rel:"noopener noreferrer"},y=t("https://community.chocolatey.org/packages"),S=r('<p>\u6BD4\u5982\u8BF4\u6211\u4EEC\u6765\u67E5\u627E Java\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/Chocolatey-Homebrew-a5d6ff0f-f36d-4eb0-a69e-2ba30dd315ea.png" alt=""></p><p>\u597D\uFF0C\u73B0\u5728\u53EF\u4EE5\u76F4\u63A5\u5728shell\u4E2D\u952E\u5165 <code>choco install jdk8</code> \u6765\u5B89\u88C5 JDK8 \u4E86\uFF0C\u5E76\u4E14\u4F1A\u81EA\u52A8\u5C06Java\u52A0\u5165\u5230\u73AF\u5883\u53D8\u91CF\u4E2D\uFF0C\u4E0D\u7528\u518D\u53BB\u300C\u6211\u7684\u7535\u8111\u300D\u300C\u73AF\u5883\u53D8\u91CF\u300D\u4E2D\u65B0\u5EFA JAVA_HOME \u5E76\u590D\u5236 JDK \u5B89\u88C5\u8DEF\u5F84\u914D\u7F6E PATH \u53D8\u91CF\u4E86\uFF0C\u662F\u4E0D\u662F\u975E\u5E38 nice\uFF1F</p><p>\u7A0D\u7B49\u7247\u523B\uFF0C\u952E\u5165 <code>java -version</code> \u5C31\u53EF\u4EE5\u786E\u8BA4Java\u662F\u5426\u5B89\u88C5\u6210\u529F\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/Chocolatey-Homebrew-31441e14-b692-4abc-8640-a8b70e08dfae.png" alt=""></p><p>\u4E0D\u5F97\u4E0D\u627F\u8BA4\uFF01\u975E\u5E38nice\uFF01</p><p><strong>2\uFF09macOS</strong></p><p>\u9996\u5148\u63A8\u8350\u5B89\u88C5 homebrew\uFF0C\u8FD9\u662FmacOS\u4E0B\u7684\u547D\u4EE4\u884C\u8F6F\u4EF6\u7BA1\u7406\u5668\uFF0C\u7528\u6765\u7B80\u5316 macOS \u4E0A\u8F6F\u4EF6\u7684\u5B89\u88C5\u8FC7\u7A0B\u3002homebrew \u662F\u5F00\u6E90\u7684\uFF0C\u5728 GitHub \u5DF2\u6536\u83B7 32k star\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/Chocolatey-Homebrew-0f9c86a0-e4b2-4103-a77e-8771ab8253f5.png" alt=""></p><p>homebrew \u7684\u5B89\u88C5\u4E5F\u975E\u5E38\u7684\u7B80\u5355\uFF0C\u53EA\u9700\u8981\u4E00\u884C\u547D\u4EE4\u5373\u53EF\u3002</p>',10),H=t("\u5B98\u65B9\u7F51\u5740\uFF1A"),J={href:"https://brew.sh/index_zh-cn",target:"_blank",rel:"noopener noreferrer"},C=t("https://brew.sh/index_zh-cn"),O=r(`<p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/Chocolatey-Homebrew-b1e8ea1c-2aec-4f79-bdc8-eb3e4fe1a0f0.png" alt=""></p><ul><li>\u4F7F\u7528 <code>brew install xxx</code> \u53EF\u4EE5\u5B89\u88C5 macOS \u4E0A\u6CA1\u6709\u9884\u88C5\u7684\u8F6F\u4EF6</li><li>\u4F7F\u7528 <code>brew install --cask yyy</code> \u53EF\u4EE5\u5B89\u88C5 macOS \u5176\u4ED6\u975E\u5F00\u6E90\u8F6F\u4EF6\u3002</li></ul><p>\u8FD9\u91CC\u662F homebrew \u5E38\u7528\u547D\u4EE4\u7684\u4E00\u4E2A\u6E05\u5355\uFF0C\u53EF\u4F9B\u53C2\u8003\u3002</p><table><thead><tr><th>\u547D\u4EE4</th><th>\u63CF\u8FF0</th></tr></thead><tbody><tr><td>brew update</td><td>\u66F4\u65B0 Homebrew</td></tr><tr><td>brew search package</td><td>\u641C\u7D22\u8F6F\u4EF6\u5305</td></tr><tr><td>brew install package</td><td>\u5B89\u88C5\u8F6F\u4EF6\u5305</td></tr><tr><td>brew uninstall package</td><td>\u5378\u8F7D\u8F6F\u4EF6\u5305</td></tr><tr><td>brew upgrade</td><td>\u5347\u7EA7\u6240\u6709\u8F6F\u4EF6\u5305</td></tr><tr><td>brew upgrade package</td><td>\u5347\u7EA7\u6307\u5B9A\u8F6F\u4EF6\u5305</td></tr><tr><td>brew list</td><td>\u5217\u51FA\u5DF2\u5B89\u88C5\u7684\u8F6F\u4EF6\u5305\u5217\u8868</td></tr><tr><td>brew services command package</td><td>\u7BA1\u7406 brew \u5B89\u88C5\u8F6F\u4EF6\u5305</td></tr><tr><td>brew services list</td><td>\u5217\u51FA brew \u7BA1\u7406\u8FD0\u884C\u7684\u670D\u52A1</td></tr><tr><td>brew info package</td><td>\u67E5\u770B\u8F6F\u4EF6\u5305\u4FE1\u606F</td></tr><tr><td>brew deps package</td><td>\u5217\u51FA\u8F6F\u4EF6\u5305\u7684\u4F9D\u8D56\u5173\u7CFB</td></tr><tr><td>brew help</td><td>\u67E5\u770B\u5E2E\u52A9</td></tr><tr><td>brew cleanup</td><td>\u6E05\u9664\u8FC7\u65F6\u8F6F\u4EF6\u5305</td></tr><tr><td>brew link package</td><td>\u521B\u5EFA\u8F6F\u4EF6\u5305\u7B26\u53F7\u94FE\u63A5</td></tr><tr><td>brew unlink package</td><td>\u53D6\u6D88\u8F6F\u4EF6\u5305\u7B26\u53F7\u94FE\u63A5</td></tr><tr><td>brew doctor</td><td>\u68C0\u67E5\u7CFB\u7EDF\u662F\u5426\u5B58\u5728\u95EE\u9898</td></tr></tbody></table><p>\u5B89\u88C5\u5B8C homebrew \u540E\uFF0C\u5EFA\u8BAE\u66FF\u6362homebrew \u7684\u9ED8\u8BA4\u6E90\u4E3A\u4E2D\u79D1\u5927\u7684\uFF0C\u539F\u56E0\u5C31\u4E0D\u7528\u6211\u591A\u8BF4\u4E86\u5427\uFF1F\u66FF\u6362\u65B9\u6CD5\u5982\u4E0B\u6240\u793A\uFF1A</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>\u66FF\u6362brew.git:
 cd &quot;$(brew --repo)&quot;
 git remote set-url origin https://mirrors.ustc.edu.cn/brew.git
 
diff --git a/dist/assets/ConcurrentHashMap.html.127182e6.js b/dist/assets/ConcurrentHashMap.html.77d65cc9.js
similarity index 99%
rename from dist/assets/ConcurrentHashMap.html.127182e6.js
rename to dist/assets/ConcurrentHashMap.html.77d65cc9.js
index f4231c38..c8e4a70e 100644
--- a/dist/assets/ConcurrentHashMap.html.127182e6.js
+++ b/dist/assets/ConcurrentHashMap.html.77d65cc9.js
@@ -1,4 +1,4 @@
-import{_ as t}from"./plugin-vue_export-helper.21dcd24c.js";import{r as e,o,c,a as n,b as p,e as l,d as s}from"./app.a0271b9c.js";const i={},u=l(`<p>\u5728\u4F7F\u7528HashMap\u65F6\uFF0C\u5728\u591A\u7EBF\u7A0B\u60C5\u51B5\u4E0B\u6269\u5BB9\u4F1A\u51FA\u73B0CPU\u63A5\u8FD1100%\u7684\u60C5\u51B5\uFF0C\u56E0\u4E3Ahashmap\u5E76\u4E0D\u662F\u7EBF\u7A0B\u5B89\u5168\u7684\uFF0C\u901A\u5E38\u6211\u4EEC\u53EF\u4EE5\u4F7F\u7528\u5728java\u4F53\u7CFB\u4E2D\u53E4\u8001\u7684hashtable\u7C7B\uFF0C\u8BE5\u7C7B\u57FA\u672C\u4E0A\u6240\u6709\u7684\u65B9\u6CD5\u90FD\u91C7\u7528synchronized\u8FDB\u884C\u7EBF\u7A0B\u5B89\u5168\u7684\u63A7\u5236\uFF0C\u53EF\u60F3\u800C\u77E5\uFF0C\u5728\u9AD8\u5E76\u53D1\u7684\u60C5\u51B5\u4E0B\uFF0C\u6BCF\u6B21\u53EA\u6709\u4E00\u4E2A\u7EBF\u7A0B\u80FD\u591F\u83B7\u53D6\u5BF9\u8C61\u76D1\u89C6\u5668\u9501\uFF0C\u8FD9\u6837\u7684\u5E76\u53D1\u6027\u80FD\u7684\u786E\u4E0D\u4EE4\u4EBA\u6EE1\u610F\u3002</p><p>\u53E6\u5916\u4E00\u79CD\u65B9\u5F0F\u901A\u8FC7Collections\u7684<code>Map&lt;K,V&gt; synchronizedMap(Map&lt;K,V&gt; m)</code>\u5C06hashmap\u5305\u88C5\u6210\u4E00\u4E2A\u7EBF\u7A0B\u5B89\u5168\u7684map\u3002\u6BD4\u5982SynchronzedMap\u7684put\u65B9\u6CD5\u6E90\u7801\u4E3A\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code>	<span class="token keyword">public</span> <span class="token class-name">V</span> <span class="token function">put</span><span class="token punctuation">(</span><span class="token class-name">K</span> key<span class="token punctuation">,</span> <span class="token class-name">V</span> value<span class="token punctuation">)</span> <span class="token punctuation">{</span>
+import{_ as t}from"./plugin-vue_export-helper.21dcd24c.js";import{r as e,o,c,a as n,b as p,e as l,d as s}from"./app.615e41d8.js";const i={},u=l(`<p>\u5728\u4F7F\u7528HashMap\u65F6\uFF0C\u5728\u591A\u7EBF\u7A0B\u60C5\u51B5\u4E0B\u6269\u5BB9\u4F1A\u51FA\u73B0CPU\u63A5\u8FD1100%\u7684\u60C5\u51B5\uFF0C\u56E0\u4E3Ahashmap\u5E76\u4E0D\u662F\u7EBF\u7A0B\u5B89\u5168\u7684\uFF0C\u901A\u5E38\u6211\u4EEC\u53EF\u4EE5\u4F7F\u7528\u5728java\u4F53\u7CFB\u4E2D\u53E4\u8001\u7684hashtable\u7C7B\uFF0C\u8BE5\u7C7B\u57FA\u672C\u4E0A\u6240\u6709\u7684\u65B9\u6CD5\u90FD\u91C7\u7528synchronized\u8FDB\u884C\u7EBF\u7A0B\u5B89\u5168\u7684\u63A7\u5236\uFF0C\u53EF\u60F3\u800C\u77E5\uFF0C\u5728\u9AD8\u5E76\u53D1\u7684\u60C5\u51B5\u4E0B\uFF0C\u6BCF\u6B21\u53EA\u6709\u4E00\u4E2A\u7EBF\u7A0B\u80FD\u591F\u83B7\u53D6\u5BF9\u8C61\u76D1\u89C6\u5668\u9501\uFF0C\u8FD9\u6837\u7684\u5E76\u53D1\u6027\u80FD\u7684\u786E\u4E0D\u4EE4\u4EBA\u6EE1\u610F\u3002</p><p>\u53E6\u5916\u4E00\u79CD\u65B9\u5F0F\u901A\u8FC7Collections\u7684<code>Map&lt;K,V&gt; synchronizedMap(Map&lt;K,V&gt; m)</code>\u5C06hashmap\u5305\u88C5\u6210\u4E00\u4E2A\u7EBF\u7A0B\u5B89\u5168\u7684map\u3002\u6BD4\u5982SynchronzedMap\u7684put\u65B9\u6CD5\u6E90\u7801\u4E3A\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code>	<span class="token keyword">public</span> <span class="token class-name">V</span> <span class="token function">put</span><span class="token punctuation">(</span><span class="token class-name">K</span> key<span class="token punctuation">,</span> <span class="token class-name">V</span> value<span class="token punctuation">)</span> <span class="token punctuation">{</span>
 	    <span class="token keyword">synchronized</span> <span class="token punctuation">(</span>mutex<span class="token punctuation">)</span> <span class="token punctuation">{</span><span class="token keyword">return</span> m<span class="token punctuation">.</span><span class="token function">put</span><span class="token punctuation">(</span>key<span class="token punctuation">,</span> value<span class="token punctuation">)</span><span class="token punctuation">;</span><span class="token punctuation">}</span>
 	<span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>\u5B9E\u9645\u4E0ASynchronizedMap\u5B9E\u73B0\u4F9D\u7136\u662F\u91C7\u7528synchronized\u72EC\u5360\u5F0F\u9501\u8FDB\u884C\u7EBF\u7A0B\u5B89\u5168\u7684\u5E76\u53D1\u63A7\u5236\u7684\u3002\u540C\u6837\uFF0C\u8FD9\u79CD\u65B9\u6848\u7684\u6027\u80FD\u4E5F\u662F\u4EE4\u4EBA\u4E0D\u592A\u6EE1\u610F\u7684\u3002\u9488\u5BF9\u8FD9\u79CD\u5883\u51B5\uFF0CDoug Lea\u5927\u5E08\u4E0D\u9057\u4F59\u529B\u7684\u4E3A\u6211\u4EEC\u521B\u9020\u4E86\u4E00\u4E9B\u7EBF\u7A0B\u5B89\u5168\u7684\u5E76\u53D1\u5BB9\u5668\uFF0C\u8BA9\u6BCF\u4E00\u4E2Ajava\u5F00\u53D1\u4EBA\u5458\u500D\u611F\u5E78\u798F\u3002\u76F8\u5BF9\u4E8Ehashmap\u6765\u8BF4\uFF0CConcurrentHashMap\u5C31\u662F\u7EBF\u7A0B\u5B89\u5168\u7684map\uFF0C\u5176\u4E2D<strong>\u5229\u7528\u4E86\u9501\u5206\u6BB5\u7684\u601D\u60F3\u63D0\u9AD8\u4E86\u5E76\u53D1\u5EA6</strong>\u3002</p><p>ConcurrentHashMap\u5728JDK1.6\u7684\u7248\u672C\u7F51\u4E0A\u8D44\u6599\u5F88\u591A\uFF0C\u6709\u5174\u8DA3\u7684\u53EF\u4EE5\u53BB\u770B\u770B\u3002 JDK 1.6\u7248\u672C\u5173\u952E\u8981\u7D20\uFF1A</p><ol><li>segment\u7EE7\u627F\u4E86ReentrantLock\u5145\u5F53\u9501\u7684\u89D2\u8272\uFF0C\u4E3A\u6BCF\u4E00\u4E2Asegment\u63D0\u4F9B\u4E86\u7EBF\u7A0B\u5B89\u5168\u7684\u4FDD\u969C\uFF1B</li><li>segment\u7EF4\u62A4\u4E86\u54C8\u5E0C\u6563\u5217\u8868\u7684\u82E5\u5E72\u4E2A\u6876\uFF0C\u6BCF\u4E2A\u6876\u7531HashEntry\u6784\u6210\u7684\u94FE\u8868\u3002</li></ol><p>\u800C\u5230\u4E86JDK 1.8\u7684ConcurrentHashMap\u5C31\u6709\u4E86\u5F88\u5927\u7684\u53D8\u5316\uFF0C\u5149\u662F\u4EE3\u7801\u91CF\u5C31\u8DB3\u8DB3\u589E\u52A0\u4E86\u5F88\u591A\u30021.8\u7248\u672C\u820D\u5F03\u4E86segment\uFF0C\u5E76\u4E14\u5927\u91CF\u4F7F\u7528\u4E86synchronized\uFF0C\u4EE5\u53CACAS\u65E0\u9501\u64CD\u4F5C\u4EE5\u4FDD\u8BC1ConcurrentHashMap\u64CD\u4F5C\u7684\u7EBF\u7A0B\u5B89\u5168\u6027\u3002</p><p>\u81F3\u4E8E\u4E3A\u4EC0\u4E48\u4E0D\u7528ReentrantLock\u800C\u662FSynchronzied\u5462\uFF1F\u5B9E\u9645\u4E0A\uFF0Csynchronzied\u505A\u4E86\u5F88\u591A\u7684\u4F18\u5316\uFF0C\u5305\u62EC\u504F\u5411\u9501\uFF0C\u8F7B\u91CF\u7EA7\u9501\uFF0C\u91CD\u91CF\u7EA7\u9501\uFF0C\u53EF\u4EE5\u4F9D\u6B21\u5411\u4E0A\u5347\u7EA7\u9501\u72B6\u6001\uFF0C\u4F46\u4E0D\u80FD\u964D\u7EA7\uFF0C\u56E0\u6B64\uFF0C\u4F7F\u7528synchronized\u76F8\u8F83\u4E8EReentrantLock\u7684\u6027\u80FD\u4F1A\u6301\u5E73\u751A\u81F3\u5728\u67D0\u4E9B\u60C5\u51B5\u66F4\u4F18\uFF0C\u5177\u4F53\u7684\u6027\u80FD\u6D4B\u8BD5\u53EF\u4EE5\u53BB\u7F51\u4E0A\u67E5\u9605\u4E00\u4E9B\u8D44\u6599\u3002\u53E6\u5916\uFF0C\u5E95\u5C42\u6570\u636E\u7ED3\u6784\u6539\u53D8\u4E3A\u91C7\u7528\u6570\u7EC4+\u94FE\u8868+\u7EA2\u9ED1\u6811\u7684\u6570\u636E\u5F62\u5F0F\u3002</p><h2 id="\u5173\u952E\u5C5E\u6027\u53CA\u7C7B" tabindex="-1"><a class="header-anchor" href="#\u5173\u952E\u5C5E\u6027\u53CA\u7C7B" aria-hidden="true">#</a> \u5173\u952E\u5C5E\u6027\u53CA\u7C7B</h2><p>\u5728\u4E86\u89E3ConcurrentHashMap\u7684\u5177\u4F53\u65B9\u6CD5\u5B9E\u73B0\u524D\uFF0C\u6211\u4EEC\u9700\u8981\u7CFB\u7EDF\u7684\u6765\u770B\u4E00\u4E0B\u51E0\u4E2A\u5173\u952E\u7684\u5730\u65B9\u3002</p><h3 id="concurrenthashmap\u7684\u5173\u952E\u5C5E\u6027" tabindex="-1"><a class="header-anchor" href="#concurrenthashmap\u7684\u5173\u952E\u5C5E\u6027" aria-hidden="true">#</a> <strong>ConcurrentHashMap\u7684\u5173\u952E\u5C5E\u6027</strong></h3><ol><li><strong>table</strong><code>volatile Node&lt;K,V&gt;[] table</code>:</li></ol><p>\u88C5\u8F7DNode\u7684\u6570\u7EC4\uFF0C\u4F5C\u4E3AConcurrentHashMap\u7684\u6570\u636E\u5BB9\u5668\uFF0C\u91C7\u7528\u61D2\u52A0\u8F7D\u7684\u65B9\u5F0F\uFF0C\u76F4\u5230\u7B2C\u4E00\u6B21\u63D2\u5165\u6570\u636E\u7684\u65F6\u5019\u624D\u4F1A\u8FDB\u884C\u521D\u59CB\u5316\u64CD\u4F5C\uFF0C\u6570\u7EC4\u7684\u5927\u5C0F\u603B\u662F\u4E3A2\u7684\u5E42\u6B21\u65B9\u3002</p><ol start="2"><li><strong>nextTable</strong><code>volatile Node&lt;K,V&gt;[] nextTable;</code></li></ol><p>\u6269\u5BB9\u65F6\u4F7F\u7528\uFF0C\u5E73\u65F6\u4E3Anull\uFF0C\u53EA\u6709\u5728\u6269\u5BB9\u7684\u65F6\u5019\u624D\u4E3A\u975Enull</p><ol start="3"><li><strong>sizeCtl</strong><code>volatile int sizeCtl;</code></li></ol><p>\u8BE5\u5C5E\u6027\u7528\u6765\u63A7\u5236table\u6570\u7EC4\u7684\u5927\u5C0F\uFF0C\u6839\u636E\u662F\u5426\u521D\u59CB\u5316\u548C\u662F\u5426\u6B63\u5728\u6269\u5BB9\u6709\u51E0\u79CD\u60C5\u51B5\uFF1A</p><ul><li><strong>\u5F53\u503C\u4E3A\u8D1F\u6570\u65F6\uFF1A</strong> \u5982\u679C\u4E3A-1\u8868\u793A\u6B63\u5728\u521D\u59CB\u5316\uFF0C\u5982\u679C\u4E3A-N\u5219\u8868\u793A\u5F53\u524D\u6B63\u6709N-1\u4E2A\u7EBF\u7A0B\u8FDB\u884C\u6269\u5BB9\u64CD\u4F5C\uFF1B</li><li><strong>\u5F53\u503C\u4E3A\u6B63\u6570\u65F6\uFF1A</strong> \u5982\u679C\u5F53\u524D\u6570\u7EC4\u4E3Anull\u7684\u8BDD\u8868\u793Atable\u5728\u521D\u59CB\u5316\u8FC7\u7A0B\u4E2D\uFF0CsizeCtl\u8868\u793A\u4E3A\u9700\u8981\u65B0\u5EFA\u6570\u7EC4\u7684\u957F\u5EA6\uFF1B</li><li>\u82E5\u5DF2\u7ECF\u521D\u59CB\u5316\u4E86\uFF0C\u8868\u793A\u5F53\u524D\u6570\u636E\u5BB9\u5668\uFF08table\u6570\u7EC4\uFF09\u53EF\u7528\u5BB9\u91CF\u4E5F\u53EF\u4EE5\u7406\u89E3\u6210\u4E34\u754C\u503C\uFF08\u63D2\u5165\u8282\u70B9\u6570\u8D85\u8FC7\u4E86\u8BE5\u4E34\u754C\u503C\u5C31\u9700\u8981\u6269\u5BB9\uFF09\uFF0C\u5177\u4F53\u6307\u4E3A\u6570\u7EC4\u7684\u957F\u5EA6n \u4E58\u4EE5 \u52A0\u8F7D\u56E0\u5B50loadFactor\uFF1B</li><li>\u5F53\u503C\u4E3A0\u65F6\uFF0C\u5373\u6570\u7EC4\u957F\u5EA6\u4E3A\u9ED8\u8BA4\u521D\u59CB\u503C\u3002</li></ul><ol start="4"><li><code>sun.misc.Unsafe U</code></li></ol><p>\u5728ConcurrentHashMapde\u7684\u5B9E\u73B0\u4E2D\u53EF\u4EE5\u770B\u5230\u5927\u91CF\u7684U.compareAndSwapXXXX\u7684\u65B9\u6CD5\u53BB\u4FEE\u6539ConcurrentHashMap\u7684\u4E00\u4E9B\u5C5E\u6027\u3002</p><p>\u8FD9\u4E9B\u65B9\u6CD5\u5B9E\u9645\u4E0A\u662F\u5229\u7528\u4E86CAS\u7B97\u6CD5\u4FDD\u8BC1\u4E86\u7EBF\u7A0B\u5B89\u5168\u6027\uFF0C\u8FD9\u662F\u4E00\u79CD\u4E50\u89C2\u7B56\u7565\uFF0C\u5047\u8BBE\u6BCF\u4E00\u6B21\u64CD\u4F5C\u90FD\u4E0D\u4F1A\u4EA7\u751F\u51B2\u7A81\uFF0C\u5F53\u4E14\u4EC5\u5F53\u51B2\u7A81\u53D1\u751F\u7684\u65F6\u5019\u518D\u53BB\u5C1D\u8BD5\u3002</p><p>\u800CCAS\u64CD\u4F5C\u4F9D\u8D56\u4E8E\u73B0\u4EE3\u5904\u7406\u5668\u6307\u4EE4\u96C6\uFF0C\u901A\u8FC7\u5E95\u5C42<strong>CMPXCHG</strong>\u6307\u4EE4\u5B9E\u73B0\u3002CAS(V,O,N)\u6838\u5FC3\u601D\u60F3\u4E3A\uFF1A<strong>\u82E5\u5F53\u524D\u53D8\u91CF\u5B9E\u9645\u503CV\u4E0E\u671F\u671B\u7684\u65E7\u503CO\u76F8\u540C\uFF0C\u5219\u8868\u660E\u8BE5\u53D8\u91CF\u6CA1\u88AB\u5176\u4ED6\u7EBF\u7A0B\u8FDB\u884C\u4FEE\u6539\uFF0C\u56E0\u6B64\u53EF\u4EE5\u5B89\u5168\u7684\u5C06\u65B0\u503CN\u8D4B\u503C\u7ED9\u53D8\u91CF\uFF1B\u82E5\u5F53\u524D\u53D8\u91CF\u5B9E\u9645\u503CV\u4E0E\u671F\u671B\u7684\u65E7\u503CO\u4E0D\u76F8\u540C\uFF0C\u5219\u8868\u660E\u8BE5\u53D8\u91CF\u5DF2\u7ECF\u88AB\u5176\u4ED6\u7EBF\u7A0B\u505A\u4E86\u5904\u7406\uFF0C\u6B64\u65F6\u5C06\u65B0\u503CN\u8D4B\u7ED9\u53D8\u91CF\u64CD\u4F5C\u5C31\u662F\u4E0D\u5B89\u5168\u7684\uFF0C\u5728\u8FDB\u884C\u91CD\u8BD5</strong>\u3002</p><p>\u800C\u5728\u5927\u91CF\u7684\u540C\u6B65\u7EC4\u4EF6\u548C\u5E76\u53D1\u5BB9\u5668\u7684\u5B9E\u73B0\u4E2D\u4F7F\u7528CAS\u662F\u901A\u8FC7<code>sun.misc.Unsafe</code>\u7C7B\u5B9E\u73B0\u7684\uFF0C\u8BE5\u7C7B\u63D0\u4F9B\u4E86\u4E00\u4E9B\u53EF\u4EE5\u76F4\u63A5\u64CD\u63A7\u5185\u5B58\u548C\u7EBF\u7A0B\u7684\u5E95\u5C42\u64CD\u4F5C\uFF0C\u53EF\u4EE5\u7406\u89E3\u4E3Ajava\u4E2D\u7684\u201C\u6307\u9488\u201D\u3002\u8BE5\u6210\u5458\u53D8\u91CF\u7684\u83B7\u53D6\u662F\u5728\u9759\u6001\u4EE3\u7801\u5757\u4E2D\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">static</span> <span class="token punctuation">{</span>
diff --git a/dist/assets/ConcurrentLinkedQueue.html.ad944043.js b/dist/assets/ConcurrentLinkedQueue.html.f8564dd9.js
similarity index 99%
rename from dist/assets/ConcurrentLinkedQueue.html.ad944043.js
rename to dist/assets/ConcurrentLinkedQueue.html.f8564dd9.js
index 4ee850a0..8bf3412e 100644
--- a/dist/assets/ConcurrentLinkedQueue.html.ad944043.js
+++ b/dist/assets/ConcurrentLinkedQueue.html.f8564dd9.js
@@ -1,4 +1,4 @@
-import{_ as t}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o,c,a as n,b as a,e as l,d as e}from"./app.a0271b9c.js";const u={},i=l(`<p>\u961F\u5217\u662F\u6211\u4EEC\u5E38\u7528\u7684\u4E00\u79CD\u6570\u636E\u7ED3\u6784\uFF0C\u4E3A\u4E86\u89E3\u51B3\u7EBF\u7A0B\u5B89\u5168\u7684\u95EE\u9898\uFF0CDoug Lea\u5927\u5E08\u4E3A\u6211\u4EEC\u51C6\u5907\u4E86ConcurrentLinkedQueue\u8FD9\u4E2A\u7EBF\u7A0B\u5B89\u5168\u7684\u961F\u5217\u3002\u4ECE\u7C7B\u540D\u5C31\u53EF\u4EE5\u770B\u7684\u51FA\u6765\u5B9E\u73B0\u961F\u5217\u7684\u6570\u636E\u7ED3\u6784\u662F\u94FE\u5F0F\u3002</p><h2 id="node" tabindex="-1"><a class="header-anchor" href="#node" aria-hidden="true">#</a> Node</h2><p>\u8981\u60F3\u5148\u5B66\u4E60ConcurrentLinkedQueue\u81EA\u7136\u800C\u7136\u5F97\u5148\u4ECE\u5B83\u7684\u8282\u70B9\u7C7B\u770B\u8D77\uFF0C\u660E\u767D\u5B83\u7684\u5E95\u5C42\u6570\u636E\u7ED3\u6784\u3002Node\u7C7B\u7684\u6E90\u7801\u4E3A\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">private</span> <span class="token keyword">static</span> <span class="token keyword">class</span> <span class="token class-name">Node</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">E</span><span class="token punctuation">&gt;</span></span> <span class="token punctuation">{</span>
+import{_ as t}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o,c,a as n,b as a,e as l,d as e}from"./app.615e41d8.js";const u={},i=l(`<p>\u961F\u5217\u662F\u6211\u4EEC\u5E38\u7528\u7684\u4E00\u79CD\u6570\u636E\u7ED3\u6784\uFF0C\u4E3A\u4E86\u89E3\u51B3\u7EBF\u7A0B\u5B89\u5168\u7684\u95EE\u9898\uFF0CDoug Lea\u5927\u5E08\u4E3A\u6211\u4EEC\u51C6\u5907\u4E86ConcurrentLinkedQueue\u8FD9\u4E2A\u7EBF\u7A0B\u5B89\u5168\u7684\u961F\u5217\u3002\u4ECE\u7C7B\u540D\u5C31\u53EF\u4EE5\u770B\u7684\u51FA\u6765\u5B9E\u73B0\u961F\u5217\u7684\u6570\u636E\u7ED3\u6784\u662F\u94FE\u5F0F\u3002</p><h2 id="node" tabindex="-1"><a class="header-anchor" href="#node" aria-hidden="true">#</a> Node</h2><p>\u8981\u60F3\u5148\u5B66\u4E60ConcurrentLinkedQueue\u81EA\u7136\u800C\u7136\u5F97\u5148\u4ECE\u5B83\u7684\u8282\u70B9\u7C7B\u770B\u8D77\uFF0C\u660E\u767D\u5B83\u7684\u5E95\u5C42\u6570\u636E\u7ED3\u6784\u3002Node\u7C7B\u7684\u6E90\u7801\u4E3A\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">private</span> <span class="token keyword">static</span> <span class="token keyword">class</span> <span class="token class-name">Node</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">E</span><span class="token punctuation">&gt;</span></span> <span class="token punctuation">{</span>
         <span class="token keyword">volatile</span> <span class="token class-name">E</span> item<span class="token punctuation">;</span>
         <span class="token keyword">volatile</span> <span class="token class-name">Node</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">E</span><span class="token punctuation">&gt;</span></span> next<span class="token punctuation">;</span>
 		<span class="token punctuation">.</span><span class="token punctuation">.</span><span class="token punctuation">.</span><span class="token punctuation">.</span><span class="token punctuation">.</span><span class="token punctuation">.</span><span class="token punctuation">.</span>
diff --git a/dist/assets/CopyOnWriteArrayList.html.375356c8.js b/dist/assets/CopyOnWriteArrayList.html.2fa1badd.js
similarity index 99%
rename from dist/assets/CopyOnWriteArrayList.html.375356c8.js
rename to dist/assets/CopyOnWriteArrayList.html.2fa1badd.js
index f77ce901..aa324f64 100644
--- a/dist/assets/CopyOnWriteArrayList.html.375356c8.js
+++ b/dist/assets/CopyOnWriteArrayList.html.2fa1badd.js
@@ -1,4 +1,4 @@
-import{_ as e}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o,c,a as n,b as a,e as i,d as t}from"./app.a0271b9c.js";const l={},r=i(`<h2 id="copyonwritearraylist\u7684\u7B80\u4ECB" tabindex="-1"><a class="header-anchor" href="#copyonwritearraylist\u7684\u7B80\u4ECB" aria-hidden="true">#</a> CopyOnWriteArrayList\u7684\u7B80\u4ECB</h2><p>java\u5B66\u4E60\u8005\u90FD\u6E05\u695AArrayList\u5E76\u4E0D\u662F\u7EBF\u7A0B\u5B89\u5168\u7684\uFF0C\u5728\u8BFB\u7EBF\u7A0B\u5728\u8BFB\u53D6ArrayList\u7684\u65F6\u5019\u5982\u679C\u6709\u5199\u7EBF\u7A0B\u5728\u5199\u6570\u636E\u7684\u65F6\u5019\uFF0C\u57FA\u4E8Efast-fail\u673A\u5236\uFF0C\u4F1A\u629B\u51FA<strong>ConcurrentModificationException</strong>\u5F02\u5E38\uFF0C\u4E5F\u5C31\u662F\u8BF4ArrayList\u5E76\u4E0D\u662F\u4E00\u4E2A\u7EBF\u7A0B\u5B89\u5168\u7684\u5BB9\u5668\uFF0C\u5F53\u7136\u60A8\u53EF\u4EE5\u7528Vector,\u6216\u8005\u4F7F\u7528Collections\u7684\u9759\u6001\u65B9\u6CD5\u5C06ArrayList\u5305\u88C5\u6210\u4E00\u4E2A\u7EBF\u7A0B\u5B89\u5168\u7684\u7C7B\uFF0C\u4F46\u662F\u8FD9\u4E9B\u65B9\u5F0F\u90FD\u662F\u91C7\u7528java\u5173\u952E\u5B57synchronzied\u5BF9\u65B9\u6CD5\u8FDB\u884C\u4FEE\u9970\uFF0C\u5229\u7528\u72EC\u5360\u5F0F\u9501\u6765\u4FDD\u8BC1\u7EBF\u7A0B\u5B89\u5168\u7684\u3002\u4F46\u662F\uFF0C\u7531\u4E8E\u72EC\u5360\u5F0F\u9501\u5728\u540C\u4E00\u65F6\u523B\u53EA\u6709\u4E00\u4E2A\u7EBF\u7A0B\u80FD\u591F\u83B7\u53D6\u5230\u5BF9\u8C61\u76D1\u89C6\u5668\uFF0C\u5F88\u663E\u7136\u8FD9\u79CD\u65B9\u5F0F\u6548\u7387\u5E76\u4E0D\u662F\u592A\u9AD8\u3002</p><p>\u56DE\u5230\u4E1A\u52A1\u573A\u666F\u4E2D\uFF0C\u6709\u5F88\u591A\u4E1A\u52A1\u5F80\u5F80\u662F\u8BFB\u591A\u5199\u5C11\u7684\uFF0C\u6BD4\u5982\u7CFB\u7EDF\u914D\u7F6E\u7684\u4FE1\u606F\uFF0C\u9664\u4E86\u5728\u521D\u59CB\u8FDB\u884C\u7CFB\u7EDF\u914D\u7F6E\u7684\u65F6\u5019\u9700\u8981\u5199\u5165\u6570\u636E\uFF0C\u5176\u4ED6\u5927\u90E8\u5206\u65F6\u523B\u5176\u4ED6\u6A21\u5757\u4E4B\u540E\u5BF9\u7CFB\u7EDF\u4FE1\u606F\u53EA\u9700\u8981\u8FDB\u884C\u8BFB\u53D6\uFF0C\u53C8\u6BD4\u5982\u767D\u540D\u5355\uFF0C\u9ED1\u540D\u5355\u7B49\u914D\u7F6E\uFF0C\u53EA\u9700\u8981\u8BFB\u53D6\u540D\u5355\u914D\u7F6E\u7136\u540E\u68C0\u6D4B\u5F53\u524D\u7528\u6237\u662F\u5426\u5728\u8BE5\u914D\u7F6E\u8303\u56F4\u4EE5\u5185\u3002</p><p>\u7C7B\u4F3C\u7684\u8FD8\u6709\u5F88\u591A\u4E1A\u52A1\u573A\u666F\uFF0C\u5B83\u4EEC\u90FD\u662F\u5C5E\u4E8E<strong>\u8BFB\u591A\u5199\u5C11</strong>\u7684\u573A\u666F\u3002\u5982\u679C\u5728\u8FD9\u79CD\u60C5\u51B5\u7528\u5230\u4E0A\u8FF0\u7684\u65B9\u6CD5\uFF0C\u4F7F\u7528Vector,Collections\u8F6C\u6362\u7684\u8FD9\u4E9B\u65B9\u5F0F\u662F\u4E0D\u5408\u7406\u7684\uFF0C\u56E0\u4E3A\u5C3D\u7BA1\u591A\u4E2A\u8BFB\u7EBF\u7A0B\u4ECE\u540C\u4E00\u4E2A\u6570\u636E\u5BB9\u5668\u4E2D\u8BFB\u53D6\u6570\u636E\uFF0C\u4F46\u662F\u8BFB\u7EBF\u7A0B\u5BF9\u6570\u636E\u5BB9\u5668\u7684\u6570\u636E\u5E76\u4E0D\u4F1A\u53D1\u751F\u53D1\u751F\u4FEE\u6539\u3002</p><p>\u5F88\u81EA\u7136\u800C\u7136\u7684\u6211\u4EEC\u4F1A\u8054\u60F3\u5230ReenTrantReadWriteLock\uFF0C\u901A\u8FC7<strong>\u8BFB\u5199\u5206\u79BB</strong>\u7684\u601D\u60F3\uFF0C\u4F7F\u5F97\u8BFB\u8BFB\u4E4B\u95F4\u4E0D\u4F1A\u963B\u585E\uFF0C\u65E0\u7591\u5982\u679C\u4E00\u4E2Alist\u80FD\u591F\u505A\u5230\u88AB\u591A\u4E2A\u8BFB\u7EBF\u7A0B\u8BFB\u53D6\u7684\u8BDD\uFF0C\u6027\u80FD\u4F1A\u5927\u5927\u63D0\u5347\u4E0D\u5C11\u3002\u4F46\u662F\uFF0C\u5982\u679C\u4EC5\u4EC5\u662F\u5C06list\u901A\u8FC7\u8BFB\u5199\u9501\uFF08ReentrantReadWriteLock\uFF09\u8FDB\u884C\u518D\u4E00\u6B21\u5C01\u88C5\u7684\u8BDD\uFF0C\u7531\u4E8E\u8BFB\u5199\u9501\u7684\u7279\u6027\uFF0C\u5F53\u5199\u9501\u88AB\u5199\u7EBF\u7A0B\u83B7\u53D6\u540E\uFF0C\u8BFB\u5199\u7EBF\u7A0B\u90FD\u4F1A\u88AB\u963B\u585E\u3002\u5982\u679C\u4EC5\u4EC5\u4F7F\u7528\u8BFB\u5199\u9501\u5BF9list\u8FDB\u884C\u5C01\u88C5\u7684\u8BDD\uFF0C\u8FD9\u91CC\u4ECD\u7136\u5B58\u5728\u8BFB\u7EBF\u7A0B\u5728\u8BFB\u6570\u636E\u7684\u65F6\u5019\u88AB\u963B\u585E\u7684\u60C5\u51B5\uFF0C\u5982\u679C\u60F3list\u7684\u8BFB\u6548\u7387\u66F4\u9AD8\u7684\u8BDD\uFF0C\u8FD9\u91CC\u5C31\u662F\u6211\u4EEC\u7684\u7A81\u7834\u53E3\uFF0C\u5982\u679C\u6211\u4EEC\u4FDD\u8BC1\u8BFB\u7EBF\u7A0B\u65E0\u8BBA\u4EC0\u4E48\u65F6\u5019\u90FD\u4E0D\u88AB\u963B\u585E\uFF0C\u6548\u7387\u5C82\u4E0D\u662F\u4F1A\u66F4\u9AD8\uFF1F</p><p>Doug Lea\u5927\u5E08\u5C31\u4E3A\u6211\u4EEC\u63D0\u4F9BCopyOnWriteArrayList\u5BB9\u5668\u53EF\u4EE5\u4FDD\u8BC1\u7EBF\u7A0B\u5B89\u5168\uFF0C\u4FDD\u8BC1\u8BFB\u8BFB\u4E4B\u95F4\u5728\u4EFB\u4F55\u65F6\u5019\u90FD\u4E0D\u4F1A\u88AB\u963B\u585E\uFF0CCopyOnWriteArrayList\u4E5F\u88AB\u5E7F\u6CDB\u5E94\u7528\u4E8E\u5F88\u591A\u4E1A\u52A1\u573A\u666F\u4E4B\u4E2D\uFF0CCopyOnWriteArrayList\u503C\u5F97\u88AB\u6211\u4EEC\u597D\u597D\u8BA4\u8BC6\u4E00\u756A\u3002</p><h2 id="cow\u7684\u8BBE\u8BA1\u601D\u60F3" tabindex="-1"><a class="header-anchor" href="#cow\u7684\u8BBE\u8BA1\u601D\u60F3" aria-hidden="true">#</a> COW\u7684\u8BBE\u8BA1\u601D\u60F3</h2><p>\u56DE\u5230\u4E0A\u9762\u6240\u8BF4\u7684\uFF0C\u5982\u679C\u7B80\u5355\u7684\u4F7F\u7528\u8BFB\u5199\u9501\u7684\u8BDD\uFF0C\u5728\u5199\u9501\u88AB\u83B7\u53D6\u4E4B\u540E\uFF0C\u8BFB\u5199\u7EBF\u7A0B\u88AB\u963B\u585E\uFF0C\u53EA\u6709\u5F53\u5199\u9501\u88AB\u91CA\u653E\u540E\u8BFB\u7EBF\u7A0B\u624D\u6709\u673A\u4F1A\u83B7\u53D6\u5230\u9501\u4ECE\u800C\u8BFB\u5230\u6700\u65B0\u7684\u6570\u636E\uFF0C\u7AD9\u5728<strong>\u8BFB\u7EBF\u7A0B\u7684\u89D2\u5EA6\u6765\u770B\uFF0C\u5373\u8BFB\u7EBF\u7A0B\u4EFB\u4F55\u65F6\u5019\u90FD\u662F\u83B7\u53D6\u5230\u6700\u65B0\u7684\u6570\u636E\uFF0C\u6EE1\u8DB3\u6570\u636E\u5B9E\u65F6\u6027</strong>\u3002</p><p>\u65E2\u7136\u6211\u4EEC\u8BF4\u5230\u8981\u8FDB\u884C\u4F18\u5316\uFF0C\u5FC5\u7136\u6709trade-off,\u6211\u4EEC\u5C31\u53EF\u4EE5<strong>\u727A\u7272\u6570\u636E\u5B9E\u65F6\u6027\u6EE1\u8DB3\u6570\u636E\u7684\u6700\u7EC8\u4E00\u81F4\u6027\u5373\u53EF</strong>\u3002\u800CCopyOnWriteArrayList\u5C31\u662F\u901A\u8FC7Copy-On-Write(COW)\uFF0C\u5373\u5199\u65F6\u590D\u5236\u7684\u601D\u60F3\u6765\u901A\u8FC7\u5EF6\u65F6\u66F4\u65B0\u7684\u7B56\u7565\u6765\u5B9E\u73B0\u6570\u636E\u7684\u6700\u7EC8\u4E00\u81F4\u6027\uFF0C\u5E76\u4E14\u80FD\u591F\u4FDD\u8BC1\u8BFB\u7EBF\u7A0B\u95F4\u4E0D\u963B\u585E\u3002</p><p>COW\u901A\u4FD7\u7684\u7406\u89E3\u662F\u5F53\u6211\u4EEC\u5F80\u4E00\u4E2A\u5BB9\u5668\u6DFB\u52A0\u5143\u7D20\u7684\u65F6\u5019\uFF0C\u4E0D\u76F4\u63A5\u5F80\u5F53\u524D\u5BB9\u5668\u6DFB\u52A0\uFF0C\u800C\u662F\u5148\u5C06\u5F53\u524D\u5BB9\u5668\u8FDB\u884CCopy\uFF0C\u590D\u5236\u51FA\u4E00\u4E2A\u65B0\u7684\u5BB9\u5668\uFF0C\u7136\u540E\u65B0\u7684\u5BB9\u5668\u91CC\u6DFB\u52A0\u5143\u7D20\uFF0C\u6DFB\u52A0\u5B8C\u5143\u7D20\u4E4B\u540E\uFF0C\u518D\u5C06\u539F\u5BB9\u5668\u7684\u5F15\u7528\u6307\u5411\u65B0\u7684\u5BB9\u5668\u3002</p><p>\u5BF9CopyOnWrite\u5BB9\u5668\u8FDB\u884C\u5E76\u53D1\u7684\u8BFB\u7684\u65F6\u5019\uFF0C\u4E0D\u9700\u8981\u52A0\u9501\uFF0C\u56E0\u4E3A\u5F53\u524D\u5BB9\u5668\u4E0D\u4F1A\u6DFB\u52A0\u4EFB\u4F55\u5143\u7D20\u3002\u6240\u4EE5CopyOnWrite\u5BB9\u5668\u4E5F\u662F\u4E00\u79CD\u8BFB\u5199\u5206\u79BB\u7684\u601D\u60F3\uFF0C\u5EF6\u65F6\u66F4\u65B0\u7684\u7B56\u7565\u662F\u901A\u8FC7\u5728\u5199\u7684\u65F6\u5019\u9488\u5BF9\u7684\u662F\u4E0D\u540C\u7684\u6570\u636E\u5BB9\u5668\u6765\u5B9E\u73B0\u7684\uFF0C\u653E\u5F03\u6570\u636E\u5B9E\u65F6\u6027\u8FBE\u5230\u6570\u636E\u7684\u6700\u7EC8\u4E00\u81F4\u6027\u3002</p><h2 id="copyonwritearraylist\u7684\u5B9E\u73B0\u539F\u7406" tabindex="-1"><a class="header-anchor" href="#copyonwritearraylist\u7684\u5B9E\u73B0\u539F\u7406" aria-hidden="true">#</a> CopyOnWriteArrayList\u7684\u5B9E\u73B0\u539F\u7406</h2><p>\u73B0\u5728\u6211\u4EEC\u6765\u901A\u8FC7\u770B\u6E90\u7801\u7684\u65B9\u5F0F\u6765\u7406\u89E3CopyOnWriteArrayList\uFF0C\u5B9E\u9645\u4E0ACopyOnWriteArrayList\u5185\u90E8\u7EF4\u62A4\u7684\u5C31\u662F\u4E00\u4E2A\u6570\u7EC4</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token doc-comment comment">/** The array, accessed only via getArray/setArray. */</span>
+import{_ as e}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o,c,a as n,b as a,e as i,d as t}from"./app.615e41d8.js";const l={},r=i(`<h2 id="copyonwritearraylist\u7684\u7B80\u4ECB" tabindex="-1"><a class="header-anchor" href="#copyonwritearraylist\u7684\u7B80\u4ECB" aria-hidden="true">#</a> CopyOnWriteArrayList\u7684\u7B80\u4ECB</h2><p>java\u5B66\u4E60\u8005\u90FD\u6E05\u695AArrayList\u5E76\u4E0D\u662F\u7EBF\u7A0B\u5B89\u5168\u7684\uFF0C\u5728\u8BFB\u7EBF\u7A0B\u5728\u8BFB\u53D6ArrayList\u7684\u65F6\u5019\u5982\u679C\u6709\u5199\u7EBF\u7A0B\u5728\u5199\u6570\u636E\u7684\u65F6\u5019\uFF0C\u57FA\u4E8Efast-fail\u673A\u5236\uFF0C\u4F1A\u629B\u51FA<strong>ConcurrentModificationException</strong>\u5F02\u5E38\uFF0C\u4E5F\u5C31\u662F\u8BF4ArrayList\u5E76\u4E0D\u662F\u4E00\u4E2A\u7EBF\u7A0B\u5B89\u5168\u7684\u5BB9\u5668\uFF0C\u5F53\u7136\u60A8\u53EF\u4EE5\u7528Vector,\u6216\u8005\u4F7F\u7528Collections\u7684\u9759\u6001\u65B9\u6CD5\u5C06ArrayList\u5305\u88C5\u6210\u4E00\u4E2A\u7EBF\u7A0B\u5B89\u5168\u7684\u7C7B\uFF0C\u4F46\u662F\u8FD9\u4E9B\u65B9\u5F0F\u90FD\u662F\u91C7\u7528java\u5173\u952E\u5B57synchronzied\u5BF9\u65B9\u6CD5\u8FDB\u884C\u4FEE\u9970\uFF0C\u5229\u7528\u72EC\u5360\u5F0F\u9501\u6765\u4FDD\u8BC1\u7EBF\u7A0B\u5B89\u5168\u7684\u3002\u4F46\u662F\uFF0C\u7531\u4E8E\u72EC\u5360\u5F0F\u9501\u5728\u540C\u4E00\u65F6\u523B\u53EA\u6709\u4E00\u4E2A\u7EBF\u7A0B\u80FD\u591F\u83B7\u53D6\u5230\u5BF9\u8C61\u76D1\u89C6\u5668\uFF0C\u5F88\u663E\u7136\u8FD9\u79CD\u65B9\u5F0F\u6548\u7387\u5E76\u4E0D\u662F\u592A\u9AD8\u3002</p><p>\u56DE\u5230\u4E1A\u52A1\u573A\u666F\u4E2D\uFF0C\u6709\u5F88\u591A\u4E1A\u52A1\u5F80\u5F80\u662F\u8BFB\u591A\u5199\u5C11\u7684\uFF0C\u6BD4\u5982\u7CFB\u7EDF\u914D\u7F6E\u7684\u4FE1\u606F\uFF0C\u9664\u4E86\u5728\u521D\u59CB\u8FDB\u884C\u7CFB\u7EDF\u914D\u7F6E\u7684\u65F6\u5019\u9700\u8981\u5199\u5165\u6570\u636E\uFF0C\u5176\u4ED6\u5927\u90E8\u5206\u65F6\u523B\u5176\u4ED6\u6A21\u5757\u4E4B\u540E\u5BF9\u7CFB\u7EDF\u4FE1\u606F\u53EA\u9700\u8981\u8FDB\u884C\u8BFB\u53D6\uFF0C\u53C8\u6BD4\u5982\u767D\u540D\u5355\uFF0C\u9ED1\u540D\u5355\u7B49\u914D\u7F6E\uFF0C\u53EA\u9700\u8981\u8BFB\u53D6\u540D\u5355\u914D\u7F6E\u7136\u540E\u68C0\u6D4B\u5F53\u524D\u7528\u6237\u662F\u5426\u5728\u8BE5\u914D\u7F6E\u8303\u56F4\u4EE5\u5185\u3002</p><p>\u7C7B\u4F3C\u7684\u8FD8\u6709\u5F88\u591A\u4E1A\u52A1\u573A\u666F\uFF0C\u5B83\u4EEC\u90FD\u662F\u5C5E\u4E8E<strong>\u8BFB\u591A\u5199\u5C11</strong>\u7684\u573A\u666F\u3002\u5982\u679C\u5728\u8FD9\u79CD\u60C5\u51B5\u7528\u5230\u4E0A\u8FF0\u7684\u65B9\u6CD5\uFF0C\u4F7F\u7528Vector,Collections\u8F6C\u6362\u7684\u8FD9\u4E9B\u65B9\u5F0F\u662F\u4E0D\u5408\u7406\u7684\uFF0C\u56E0\u4E3A\u5C3D\u7BA1\u591A\u4E2A\u8BFB\u7EBF\u7A0B\u4ECE\u540C\u4E00\u4E2A\u6570\u636E\u5BB9\u5668\u4E2D\u8BFB\u53D6\u6570\u636E\uFF0C\u4F46\u662F\u8BFB\u7EBF\u7A0B\u5BF9\u6570\u636E\u5BB9\u5668\u7684\u6570\u636E\u5E76\u4E0D\u4F1A\u53D1\u751F\u53D1\u751F\u4FEE\u6539\u3002</p><p>\u5F88\u81EA\u7136\u800C\u7136\u7684\u6211\u4EEC\u4F1A\u8054\u60F3\u5230ReenTrantReadWriteLock\uFF0C\u901A\u8FC7<strong>\u8BFB\u5199\u5206\u79BB</strong>\u7684\u601D\u60F3\uFF0C\u4F7F\u5F97\u8BFB\u8BFB\u4E4B\u95F4\u4E0D\u4F1A\u963B\u585E\uFF0C\u65E0\u7591\u5982\u679C\u4E00\u4E2Alist\u80FD\u591F\u505A\u5230\u88AB\u591A\u4E2A\u8BFB\u7EBF\u7A0B\u8BFB\u53D6\u7684\u8BDD\uFF0C\u6027\u80FD\u4F1A\u5927\u5927\u63D0\u5347\u4E0D\u5C11\u3002\u4F46\u662F\uFF0C\u5982\u679C\u4EC5\u4EC5\u662F\u5C06list\u901A\u8FC7\u8BFB\u5199\u9501\uFF08ReentrantReadWriteLock\uFF09\u8FDB\u884C\u518D\u4E00\u6B21\u5C01\u88C5\u7684\u8BDD\uFF0C\u7531\u4E8E\u8BFB\u5199\u9501\u7684\u7279\u6027\uFF0C\u5F53\u5199\u9501\u88AB\u5199\u7EBF\u7A0B\u83B7\u53D6\u540E\uFF0C\u8BFB\u5199\u7EBF\u7A0B\u90FD\u4F1A\u88AB\u963B\u585E\u3002\u5982\u679C\u4EC5\u4EC5\u4F7F\u7528\u8BFB\u5199\u9501\u5BF9list\u8FDB\u884C\u5C01\u88C5\u7684\u8BDD\uFF0C\u8FD9\u91CC\u4ECD\u7136\u5B58\u5728\u8BFB\u7EBF\u7A0B\u5728\u8BFB\u6570\u636E\u7684\u65F6\u5019\u88AB\u963B\u585E\u7684\u60C5\u51B5\uFF0C\u5982\u679C\u60F3list\u7684\u8BFB\u6548\u7387\u66F4\u9AD8\u7684\u8BDD\uFF0C\u8FD9\u91CC\u5C31\u662F\u6211\u4EEC\u7684\u7A81\u7834\u53E3\uFF0C\u5982\u679C\u6211\u4EEC\u4FDD\u8BC1\u8BFB\u7EBF\u7A0B\u65E0\u8BBA\u4EC0\u4E48\u65F6\u5019\u90FD\u4E0D\u88AB\u963B\u585E\uFF0C\u6548\u7387\u5C82\u4E0D\u662F\u4F1A\u66F4\u9AD8\uFF1F</p><p>Doug Lea\u5927\u5E08\u5C31\u4E3A\u6211\u4EEC\u63D0\u4F9BCopyOnWriteArrayList\u5BB9\u5668\u53EF\u4EE5\u4FDD\u8BC1\u7EBF\u7A0B\u5B89\u5168\uFF0C\u4FDD\u8BC1\u8BFB\u8BFB\u4E4B\u95F4\u5728\u4EFB\u4F55\u65F6\u5019\u90FD\u4E0D\u4F1A\u88AB\u963B\u585E\uFF0CCopyOnWriteArrayList\u4E5F\u88AB\u5E7F\u6CDB\u5E94\u7528\u4E8E\u5F88\u591A\u4E1A\u52A1\u573A\u666F\u4E4B\u4E2D\uFF0CCopyOnWriteArrayList\u503C\u5F97\u88AB\u6211\u4EEC\u597D\u597D\u8BA4\u8BC6\u4E00\u756A\u3002</p><h2 id="cow\u7684\u8BBE\u8BA1\u601D\u60F3" tabindex="-1"><a class="header-anchor" href="#cow\u7684\u8BBE\u8BA1\u601D\u60F3" aria-hidden="true">#</a> COW\u7684\u8BBE\u8BA1\u601D\u60F3</h2><p>\u56DE\u5230\u4E0A\u9762\u6240\u8BF4\u7684\uFF0C\u5982\u679C\u7B80\u5355\u7684\u4F7F\u7528\u8BFB\u5199\u9501\u7684\u8BDD\uFF0C\u5728\u5199\u9501\u88AB\u83B7\u53D6\u4E4B\u540E\uFF0C\u8BFB\u5199\u7EBF\u7A0B\u88AB\u963B\u585E\uFF0C\u53EA\u6709\u5F53\u5199\u9501\u88AB\u91CA\u653E\u540E\u8BFB\u7EBF\u7A0B\u624D\u6709\u673A\u4F1A\u83B7\u53D6\u5230\u9501\u4ECE\u800C\u8BFB\u5230\u6700\u65B0\u7684\u6570\u636E\uFF0C\u7AD9\u5728<strong>\u8BFB\u7EBF\u7A0B\u7684\u89D2\u5EA6\u6765\u770B\uFF0C\u5373\u8BFB\u7EBF\u7A0B\u4EFB\u4F55\u65F6\u5019\u90FD\u662F\u83B7\u53D6\u5230\u6700\u65B0\u7684\u6570\u636E\uFF0C\u6EE1\u8DB3\u6570\u636E\u5B9E\u65F6\u6027</strong>\u3002</p><p>\u65E2\u7136\u6211\u4EEC\u8BF4\u5230\u8981\u8FDB\u884C\u4F18\u5316\uFF0C\u5FC5\u7136\u6709trade-off,\u6211\u4EEC\u5C31\u53EF\u4EE5<strong>\u727A\u7272\u6570\u636E\u5B9E\u65F6\u6027\u6EE1\u8DB3\u6570\u636E\u7684\u6700\u7EC8\u4E00\u81F4\u6027\u5373\u53EF</strong>\u3002\u800CCopyOnWriteArrayList\u5C31\u662F\u901A\u8FC7Copy-On-Write(COW)\uFF0C\u5373\u5199\u65F6\u590D\u5236\u7684\u601D\u60F3\u6765\u901A\u8FC7\u5EF6\u65F6\u66F4\u65B0\u7684\u7B56\u7565\u6765\u5B9E\u73B0\u6570\u636E\u7684\u6700\u7EC8\u4E00\u81F4\u6027\uFF0C\u5E76\u4E14\u80FD\u591F\u4FDD\u8BC1\u8BFB\u7EBF\u7A0B\u95F4\u4E0D\u963B\u585E\u3002</p><p>COW\u901A\u4FD7\u7684\u7406\u89E3\u662F\u5F53\u6211\u4EEC\u5F80\u4E00\u4E2A\u5BB9\u5668\u6DFB\u52A0\u5143\u7D20\u7684\u65F6\u5019\uFF0C\u4E0D\u76F4\u63A5\u5F80\u5F53\u524D\u5BB9\u5668\u6DFB\u52A0\uFF0C\u800C\u662F\u5148\u5C06\u5F53\u524D\u5BB9\u5668\u8FDB\u884CCopy\uFF0C\u590D\u5236\u51FA\u4E00\u4E2A\u65B0\u7684\u5BB9\u5668\uFF0C\u7136\u540E\u65B0\u7684\u5BB9\u5668\u91CC\u6DFB\u52A0\u5143\u7D20\uFF0C\u6DFB\u52A0\u5B8C\u5143\u7D20\u4E4B\u540E\uFF0C\u518D\u5C06\u539F\u5BB9\u5668\u7684\u5F15\u7528\u6307\u5411\u65B0\u7684\u5BB9\u5668\u3002</p><p>\u5BF9CopyOnWrite\u5BB9\u5668\u8FDB\u884C\u5E76\u53D1\u7684\u8BFB\u7684\u65F6\u5019\uFF0C\u4E0D\u9700\u8981\u52A0\u9501\uFF0C\u56E0\u4E3A\u5F53\u524D\u5BB9\u5668\u4E0D\u4F1A\u6DFB\u52A0\u4EFB\u4F55\u5143\u7D20\u3002\u6240\u4EE5CopyOnWrite\u5BB9\u5668\u4E5F\u662F\u4E00\u79CD\u8BFB\u5199\u5206\u79BB\u7684\u601D\u60F3\uFF0C\u5EF6\u65F6\u66F4\u65B0\u7684\u7B56\u7565\u662F\u901A\u8FC7\u5728\u5199\u7684\u65F6\u5019\u9488\u5BF9\u7684\u662F\u4E0D\u540C\u7684\u6570\u636E\u5BB9\u5668\u6765\u5B9E\u73B0\u7684\uFF0C\u653E\u5F03\u6570\u636E\u5B9E\u65F6\u6027\u8FBE\u5230\u6570\u636E\u7684\u6700\u7EC8\u4E00\u81F4\u6027\u3002</p><h2 id="copyonwritearraylist\u7684\u5B9E\u73B0\u539F\u7406" tabindex="-1"><a class="header-anchor" href="#copyonwritearraylist\u7684\u5B9E\u73B0\u539F\u7406" aria-hidden="true">#</a> CopyOnWriteArrayList\u7684\u5B9E\u73B0\u539F\u7406</h2><p>\u73B0\u5728\u6211\u4EEC\u6765\u901A\u8FC7\u770B\u6E90\u7801\u7684\u65B9\u5F0F\u6765\u7406\u89E3CopyOnWriteArrayList\uFF0C\u5B9E\u9645\u4E0ACopyOnWriteArrayList\u5185\u90E8\u7EF4\u62A4\u7684\u5C31\u662F\u4E00\u4E2A\u6570\u7EC4</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token doc-comment comment">/** The array, accessed only via getArray/setArray. */</span>
 <span class="token keyword">private</span> <span class="token keyword">transient</span> <span class="token keyword">volatile</span> <span class="token class-name">Object</span><span class="token punctuation">[</span><span class="token punctuation">]</span> array<span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><p>\u5E76\u4E14\u8BE5\u6570\u7EC4\u5F15\u7528\u662F\u88ABvolatile\u4FEE\u9970\uFF0C\u6CE8\u610F\u8FD9\u91CC<strong>\u4EC5\u4EC5\u662F\u4FEE\u9970\u7684\u662F\u6570\u7EC4\u5F15\u7528</strong>\uFF0C\u5176\u4E2D\u53E6\u6709\u7384\u673A\uFF0C\u7A0D\u540E\u63ED\u6653\u3002\u5173\u4E8Evolatile\u5F88\u91CD\u8981\u7684\u4E00\u6761\u6027\u8D28\u662F\u5B83\u80FD\u591F\u591F\u4FDD\u8BC1\u53EF\u89C1\u6027\u3002\u5BF9list\u6765\u8BF4\uFF0C\u6211\u4EEC\u81EA\u7136\u800C\u7136\u6700\u5173\u5FC3\u7684\u5C31\u662F\u8BFB\u5199\u7684\u65F6\u5019\uFF0C\u5206\u522B\u4E3Aget\u548Cadd\u65B9\u6CD5\u7684\u5B9E\u73B0\u3002</p><h3 id="get\u65B9\u6CD5\u5B9E\u73B0\u539F\u7406" tabindex="-1"><a class="header-anchor" href="#get\u65B9\u6CD5\u5B9E\u73B0\u539F\u7406" aria-hidden="true">#</a> get\u65B9\u6CD5\u5B9E\u73B0\u539F\u7406</h3><p>get\u65B9\u6CD5\u7684\u6E90\u7801\u4E3A\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token class-name">E</span> <span class="token function">get</span><span class="token punctuation">(</span><span class="token keyword">int</span> index<span class="token punctuation">)</span> <span class="token punctuation">{</span>
     <span class="token keyword">return</span> <span class="token function">get</span><span class="token punctuation">(</span><span class="token function">getArray</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">,</span> index<span class="token punctuation">)</span><span class="token punctuation">;</span>
diff --git a/dist/assets/CountDownLatch.html.db5e5e87.js b/dist/assets/CountDownLatch.html.79c0b80e.js
similarity index 99%
rename from dist/assets/CountDownLatch.html.db5e5e87.js
rename to dist/assets/CountDownLatch.html.79c0b80e.js
index f525235d..e7f6827c 100644
--- a/dist/assets/CountDownLatch.html.db5e5e87.js
+++ b/dist/assets/CountDownLatch.html.79c0b80e.js
@@ -1,4 +1,4 @@
-import{_ as t}from"./plugin-vue_export-helper.21dcd24c.js";import{r as e,o as c,c as o,a as n,b as a,e as l,d as p}from"./app.a0271b9c.js";const i={},u=l(`<p>JDK\u4E2D\u63D0\u4F9B\u4E86\u4E00\u4E9B\u5DE5\u5177\u7C7B\u4EE5\u4F9B\u5F00\u53D1\u8005\u4F7F\u7528\u3002\u8FD9\u6837\u7684\u8BDD\u6211\u4EEC\u5728\u9047\u5230\u4E00\u4E9B\u5E38\u89C1\u7684\u5E94\u7528\u573A\u666F\u65F6\u5C31\u53EF\u4EE5\u4F7F\u7528\u8FD9\u4E9B\u5DE5\u5177\u7C7B\uFF0C\u800C\u4E0D\u7528\u81EA\u5DF1\u518D\u91CD\u590D\u9020\u8F6E\u5B50\u4E86\u3002</p><p>\u5B83\u4EEC\u90FD\u5728java.util.concurrent\u5305\u4E0B\u3002\u5148\u603B\u4F53\u6982\u62EC\u4E00\u4E0B\u90FD\u6709\u54EA\u4E9B\u5DE5\u5177\u7C7B\uFF0C\u5B83\u4EEC\u6709\u4EC0\u4E48\u4F5C\u7528\uFF0C\u7136\u540E\u518D\u5206\u522B\u4ECB\u7ECD\u5B83\u4EEC\u7684\u4E3B\u8981\u4F7F\u7528\u65B9\u6CD5\u548C\u539F\u7406\u3002</p><table><thead><tr><th>\u7C7B</th><th>\u4F5C\u7528</th></tr></thead><tbody><tr><td>Semaphore</td><td>\u9650\u5236\u7EBF\u7A0B\u7684\u6570\u91CF</td></tr><tr><td>Exchanger</td><td>\u4E24\u4E2A\u7EBF\u7A0B\u4EA4\u6362\u6570\u636E</td></tr><tr><td>CountDownLatch</td><td>\u7EBF\u7A0B\u7B49\u5F85\u76F4\u5230\u8BA1\u6570\u5668\u51CF\u4E3A0\u65F6\u5F00\u59CB\u5DE5\u4F5C</td></tr><tr><td>CyclicBarrier</td><td>\u4F5C\u7528\u8DDFCountDownLatch\u7C7B\u4F3C\uFF0C\u4F46\u662F\u53EF\u4EE5\u91CD\u590D\u4F7F\u7528</td></tr><tr><td>Phaser</td><td>\u589E\u5F3A\u7684CyclicBarrier</td></tr></tbody></table><p>\u4E0B\u9762\u5206\u522B\u4ECB\u7ECD\u8FD9\u51E0\u4E2A\u7C7B\u3002</p><h2 id="semaphore" tabindex="-1"><a class="header-anchor" href="#semaphore" aria-hidden="true">#</a> Semaphore</h2><h3 id="semaphore\u4ECB\u7ECD" tabindex="-1"><a class="header-anchor" href="#semaphore\u4ECB\u7ECD" aria-hidden="true">#</a> Semaphore\u4ECB\u7ECD</h3><p>Semaphore\u7FFB\u8BD1\u8FC7\u6765\u662F\u4FE1\u53F7\u7684\u610F\u601D\u3002\u987E\u540D\u601D\u4E49\uFF0C\u8FD9\u4E2A\u5DE5\u5177\u7C7B\u63D0\u4F9B\u7684\u529F\u80FD\u5C31\u662F\u591A\u4E2A\u7EBF\u7A0B\u5F7C\u6B64\u201C\u6253\u4FE1\u53F7\u201D\u3002\u800C\u8FD9\u4E2A\u201C\u4FE1\u53F7\u201D\u662F\u4E00\u4E2A<code>int</code>\u7C7B\u578B\u7684\u6570\u636E\uFF0C\u4E5F\u53EF\u4EE5\u770B\u6210\u662F\u4E00\u79CD\u201C\u8D44\u6E90\u201D\u3002</p><p>\u53EF\u4EE5\u5728\u6784\u9020\u51FD\u6570\u4E2D\u4F20\u5165\u521D\u59CB\u8D44\u6E90\u603B\u6570\uFF0C\u4EE5\u53CA\u662F\u5426\u4F7F\u7528\u201C\u516C\u5E73\u201D\u7684\u540C\u6B65\u5668\u3002\u9ED8\u8BA4\u60C5\u51B5\u4E0B\uFF0C\u662F\u975E\u516C\u5E73\u7684\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token comment">// \u9ED8\u8BA4\u60C5\u51B5\u4E0B\u4F7F\u7528\u975E\u516C\u5E73</span>
+import{_ as t}from"./plugin-vue_export-helper.21dcd24c.js";import{r as e,o as c,c as o,a as n,b as a,e as l,d as p}from"./app.615e41d8.js";const i={},u=l(`<p>JDK\u4E2D\u63D0\u4F9B\u4E86\u4E00\u4E9B\u5DE5\u5177\u7C7B\u4EE5\u4F9B\u5F00\u53D1\u8005\u4F7F\u7528\u3002\u8FD9\u6837\u7684\u8BDD\u6211\u4EEC\u5728\u9047\u5230\u4E00\u4E9B\u5E38\u89C1\u7684\u5E94\u7528\u573A\u666F\u65F6\u5C31\u53EF\u4EE5\u4F7F\u7528\u8FD9\u4E9B\u5DE5\u5177\u7C7B\uFF0C\u800C\u4E0D\u7528\u81EA\u5DF1\u518D\u91CD\u590D\u9020\u8F6E\u5B50\u4E86\u3002</p><p>\u5B83\u4EEC\u90FD\u5728java.util.concurrent\u5305\u4E0B\u3002\u5148\u603B\u4F53\u6982\u62EC\u4E00\u4E0B\u90FD\u6709\u54EA\u4E9B\u5DE5\u5177\u7C7B\uFF0C\u5B83\u4EEC\u6709\u4EC0\u4E48\u4F5C\u7528\uFF0C\u7136\u540E\u518D\u5206\u522B\u4ECB\u7ECD\u5B83\u4EEC\u7684\u4E3B\u8981\u4F7F\u7528\u65B9\u6CD5\u548C\u539F\u7406\u3002</p><table><thead><tr><th>\u7C7B</th><th>\u4F5C\u7528</th></tr></thead><tbody><tr><td>Semaphore</td><td>\u9650\u5236\u7EBF\u7A0B\u7684\u6570\u91CF</td></tr><tr><td>Exchanger</td><td>\u4E24\u4E2A\u7EBF\u7A0B\u4EA4\u6362\u6570\u636E</td></tr><tr><td>CountDownLatch</td><td>\u7EBF\u7A0B\u7B49\u5F85\u76F4\u5230\u8BA1\u6570\u5668\u51CF\u4E3A0\u65F6\u5F00\u59CB\u5DE5\u4F5C</td></tr><tr><td>CyclicBarrier</td><td>\u4F5C\u7528\u8DDFCountDownLatch\u7C7B\u4F3C\uFF0C\u4F46\u662F\u53EF\u4EE5\u91CD\u590D\u4F7F\u7528</td></tr><tr><td>Phaser</td><td>\u589E\u5F3A\u7684CyclicBarrier</td></tr></tbody></table><p>\u4E0B\u9762\u5206\u522B\u4ECB\u7ECD\u8FD9\u51E0\u4E2A\u7C7B\u3002</p><h2 id="semaphore" tabindex="-1"><a class="header-anchor" href="#semaphore" aria-hidden="true">#</a> Semaphore</h2><h3 id="semaphore\u4ECB\u7ECD" tabindex="-1"><a class="header-anchor" href="#semaphore\u4ECB\u7ECD" aria-hidden="true">#</a> Semaphore\u4ECB\u7ECD</h3><p>Semaphore\u7FFB\u8BD1\u8FC7\u6765\u662F\u4FE1\u53F7\u7684\u610F\u601D\u3002\u987E\u540D\u601D\u4E49\uFF0C\u8FD9\u4E2A\u5DE5\u5177\u7C7B\u63D0\u4F9B\u7684\u529F\u80FD\u5C31\u662F\u591A\u4E2A\u7EBF\u7A0B\u5F7C\u6B64\u201C\u6253\u4FE1\u53F7\u201D\u3002\u800C\u8FD9\u4E2A\u201C\u4FE1\u53F7\u201D\u662F\u4E00\u4E2A<code>int</code>\u7C7B\u578B\u7684\u6570\u636E\uFF0C\u4E5F\u53EF\u4EE5\u770B\u6210\u662F\u4E00\u79CD\u201C\u8D44\u6E90\u201D\u3002</p><p>\u53EF\u4EE5\u5728\u6784\u9020\u51FD\u6570\u4E2D\u4F20\u5165\u521D\u59CB\u8D44\u6E90\u603B\u6570\uFF0C\u4EE5\u53CA\u662F\u5426\u4F7F\u7528\u201C\u516C\u5E73\u201D\u7684\u540C\u6B65\u5668\u3002\u9ED8\u8BA4\u60C5\u51B5\u4E0B\uFF0C\u662F\u975E\u516C\u5E73\u7684\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token comment">// \u9ED8\u8BA4\u60C5\u51B5\u4E0B\u4F7F\u7528\u975E\u516C\u5E73</span>
 <span class="token keyword">public</span> <span class="token class-name">Semaphore</span><span class="token punctuation">(</span><span class="token keyword">int</span> <span class="token keyword">permits</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
     sync <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">NonfairSync</span><span class="token punctuation">(</span><span class="token keyword">permits</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 <span class="token punctuation">}</span>
diff --git a/dist/assets/DBeaver.html.8a022161.js b/dist/assets/DBeaver.html.16c02541.js
similarity index 99%
rename from dist/assets/DBeaver.html.8a022161.js
rename to dist/assets/DBeaver.html.16c02541.js
index 50735240..310f493b 100644
--- a/dist/assets/DBeaver.html.8a022161.js
+++ b/dist/assets/DBeaver.html.16c02541.js
@@ -1 +1 @@
-import{_ as o}from"./plugin-vue_export-helper.21dcd24c.js";import{r as n,o as p,c,a as e,b as r,d as t,e as g}from"./app.a0271b9c.js";const s={},b=e("p",null,"\u4F5C\u4E3A\u4E00\u540D\u5F00\u53D1\u8005\uFF0C\u514D\u4E0D\u4E86\u8981\u548C\u6570\u636E\u5E93\u6253\u4EA4\u9053\uFF0C\u4E8E\u662F\u6211\u4EEC\u5C31\u9700\u8981\u4E00\u6B3E\u987A\u624B\u7684\u6570\u636E\u5E93\u7BA1\u7406\u5DE5\u5177\u3002\u5F88\u957F\u4E00\u6BB5\u65F6\u95F4\u91CC\uFF0CNavicat \u90FD\u662F\u6211\u7684\u9996\u9009\uFF0C\u4F46\u6700\u8FD1\u66F4\u6362\u4E86\u4E00\u53F0\u65B0\u7535\u8111\uFF0C\u4E4B\u524D\u7684\u7EFF\u8272\u5B89\u88C5\u5305\u627E\u4E0D\u5230\u4E86\u3002",-1),i=e("p",null,"\u4E8E\u662F\u5C31\u7422\u78E8\u7740\uFF0C\u627E\u4E00\u6B3E\u514D\u8D39\u7684\uFF0C\u529F\u80FD\u548C Navicat \u6709\u4E00\u62FC\u7684\u6570\u636E\u5E93\u7BA1\u7406\u5DE5\u5177\u6765\u66FF\u4EE3\u3002\u597D\u670B\u53CB macrozheng \u7ED9\u6211\u63A8\u8350\u4E86 DBeaver\uFF0C\u8BD5\u7528\u5B8C\u540E\u4F53\u9A8C\u771F\u5FC3\u4E0D\u9519\uFF0C\u4E8E\u662F\u5C31\u6765\u7ED9\u5927\u5BB6\u5B89\u5229\u4E00\u6CE2\u3002",-1),v=e("h3",{id:"\u4E00\u3001\u5173\u4E8E-dbeaver",tabindex:"-1"},[e("a",{class:"header-anchor",href:"#\u4E00\u3001\u5173\u4E8E-dbeaver","aria-hidden":"true"},"#"),t(" \u4E00\u3001\u5173\u4E8E DBeaver")],-1),d=e("p",null,"DBeaver \u662F\u4E00\u4E2A\u8DE8\u5E73\u53F0\u7684\u6570\u636E\u5E93\u7BA1\u7406\u5DE5\u5177\uFF0C\u652F\u6301 Windows\u3001Linux \u548C macOS\u3002\u5B83\u6709\u4E24\u4E2A\u7248\u672C\uFF0C\u4F01\u4E1A\u7248\u548C\u793E\u533A\u7248\uFF0C\u5BF9\u4E8E\u4E2A\u4EBA\u5F00\u53D1\u8005\u6765\u8BF4\uFF0C\u793E\u533A\u7248\u7684\u529F\u80FD\u5DF2\u7ECF\u8DB3\u591F\u5F3A\u5927\u3002",-1),h=t("DBeaver \u662F\u7531 Java \u7F16\u5199\u7684\uFF0C\u9ED8\u8BA4\u4F7F\u7528 JDK 11 \u8FDB\u884C\u7F16\u8BD1\u3002\u793E\u533A\u7248\u57FA\u4E8E "),m={href:"https://github.com/dbeaver/dbeaver/blob/devel/LICENSE.md",target:"_blank",rel:"noopener noreferrer"},l=t("Apache-2.0 License"),j=t(" \u5728 GitHub \u4E0A\u5F00\u6E90\uFF0C\u76EE\u524D\u5DF2\u83B7\u5F97 24k+ \u7684\u661F\u6807\u3002"),u={href:"https://github.com/dbeaver/dbeaver",target:"_blank",rel:"noopener noreferrer"},_=t("https://github.com/dbeaver/dbeaver"),D=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-1.png",alt:""})],-1),B=e("p",null,"DBeaver \u652F\u6301\u51E0\u4E4E\u6240\u6709\u4E3B\u6D41\u7684\u6570\u636E\u5E93\uFF0C\u5305\u62EC\u5173\u7CFB\u578B\u6570\u636E\u5E93\u548C\u975E\u5173\u7CFB\u6570\u636E\u5E93\u3002",-1),f=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-2.png",alt:""})],-1),x=e("h3",{id:"\u4E8C\u3001\u5B89\u88C5-dbeaver",tabindex:"-1"},[e("a",{class:"header-anchor",href:"#\u4E8C\u3001\u5B89\u88C5-dbeaver","aria-hidden":"true"},"#"),t(" \u4E8C\u3001\u5B89\u88C5 DBeaver")],-1),k=e("p",null,"\u53EF\u4EE5\u901A\u8FC7 DBeaver \u5B98\u65B9\u4E0B\u8F7D\u5B89\u88C5\u5305\uFF0C\u4E5F\u53EF\u4EE5\u901A\u8FC7 GitHub \u4E0B\u8F7D release \u7248\u672C\u3002",-1),L=t("\u5B98\u65B9\u4E0B\u8F7D\u5730\u5740\uFF1A"),N={href:"https://dbeaver.io/download/",target:"_blank",rel:"noopener noreferrer"},S=t("https://dbeaver.io/download/"),M=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-3.png",alt:""})],-1),E=e("p",null,"\u6839\u636E\u81EA\u5DF1\u7535\u8111\u7684\u64CD\u4F5C\u7CFB\u7EDF\u4E0B\u8F7D\u5BF9\u5E94\u7684\u5B89\u88C5\u5305\uFF0C\u5B8C\u6574\u5B89\u88C5\u540E\uFF0C\u7B2C\u4E00\u6B65\u8981\u505A\u7684\u662F\u914D\u7F6E Maven \u955C\u50CF\uFF0C\u5426\u5219\u5728\u540E\u7EED\u4E0B\u8F7D\u6570\u636E\u5E93\u9A71\u52A8\u7684\u65F6\u5019\u4F1A\u975E\u5E38\u7684\u6162\u3002",-1),Q=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-4.png",alt:""})],-1),q=t("\u56E0\u4E3A DBeaver \u662F\u57FA\u4E8E "),I={href:"https://github.com/itwanger/toBeBetterJavaer/blob/master/docs/maven/maven.md",target:"_blank",rel:"noopener noreferrer"},w=t("Maven \u6784\u5EFA"),J=t("\u7684\uFF0C\u6570\u636E\u5E93\u9A71\u52A8\u4E5F\u5C31\u662F\u94FE\u63A5\u6570\u636E\u5E93\u7684 JDBC \u9A71\u52A8\u662F\u901A\u8FC7 Maven \u4ED3\u5E93\u4E0B\u8F7D\u7684\u3002\u9009\u62E9\u300C\u9996\u9009\u9879\u300D\u2192\u300CMaven\u300D\uFF0C\u6DFB\u52A0\u963F\u91CC\u4E91\u955C\u50CF\u5730\u5740\uFF1A"),V={href:"http://maven.aliyun.com/nexus/content/groups/public",target:"_blank",rel:"noopener noreferrer"},y=t("http://maven.aliyun.com/nexus/content/groups/public"),C=g('<p>\u548C\u914D\u7F6E Maven \u955C\u50CF\u4E00\u6837\uFF0C\u5982\u4E0B\u56FE\u6240\u793A\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-5.png" alt=""></p><p>\u914D\u7F6E\u5B8C\u6210\u540E\uFF0C\u8BB0\u5F97\u628A\u963F\u91CC\u4E91\u955C\u50CF\u4ED3\u5E93\u7F6E\u9876\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-6.png" alt=""></p><h3 id="\u4E09\u3001\u7BA1\u7406\u6570\u636E\u6E90" tabindex="-1"><a class="header-anchor" href="#\u4E09\u3001\u7BA1\u7406\u6570\u636E\u6E90" aria-hidden="true">#</a> \u4E09\u3001\u7BA1\u7406\u6570\u636E\u6E90</h3><p>\u50CF\u4F7F\u7528 Navicat \u4E00\u6837\uFF0C\u6211\u4EEC\u9700\u8981\u5148\u5EFA\u7ACB\u8FDE\u63A5\uFF0C\u8FD9\u91CC\u5C31\u4EE5 MySQL \u4E3A\u4F8B\u3002\u70B9\u51FB\u300C\u8FDE\u63A5\u300D\u5C0F\u56FE\u6807\uFF0C\u9009\u62E9\u6570\u636E\u5E93\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-7.png" alt=""></p><p>\u70B9\u51FB\u4E0B\u4E00\u6B65\uFF0C\u8FD9\u65F6\u5019\u9700\u8981\u586B\u5199\u6570\u636E\u5E93\u8FDE\u63A5\u4FE1\u606F\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-8.png" alt=""></p><p>\u70B9\u51FB\u300C\u6D4B\u8BD5\u94FE\u63A5\u300D\uFF0C\u5982\u679C\u4F7F\u7528\u9ED8\u8BA4\u7684 Maven \u4ED3\u5E93\u65F6\uFF0C\u4E0B\u8F7D\u9A71\u52A8\u4F1A\u975E\u5E38\u6162\uFF0C\u5982\u4E0B\u56FE\u6240\u793A\uFF0C\u8FD8\u5BB9\u6613\u5931\u8D25\u300C\u8E29\u8FC7\u7684\u5751\u5C31\u4E0D\u8981\u518D\u8E29\u4E86\u300D\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-9.png" alt=""></p><p>\u5982\u679C\u4F60\u524D\u9762\u6309\u7167\u6211\u8BF4\u7684\u914D\u7F6E\u4E86\u963F\u91CC\u4E91\u7684 Maven \u955C\u50CF\uFF0C\u7A0B\u5E8F\u5C31\u4E0D\u4E00\u6837\u4E86\uFF0C\u70B9\u4E86\u300C\u6D4B\u8BD5\u94FE\u63A5\u300D\uFF0C\u77AC\u95F4\u4F1A\u5F39\u51FA\u300C\u8FDE\u63A5\u5DF2\u6210\u529F\u300D\u7684\u63D0\u793A\u6846\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-10.png" alt=""></p><p>\u94FE\u63A5\u6210\u529F\u540E\uFF0C\u5C31\u53EF\u4EE5\u770B\u5230\u6570\u636E\u5E93\u4E2D\u7684\u8868\u554A\u3001\u89C6\u56FE\u554A\u3001\u7D22\u5F15\u554A\u7B49\u7B49\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-11.png" alt=""></p><h3 id="\u56DB\u3001\u7BA1\u7406\u8868" tabindex="-1"><a class="header-anchor" href="#\u56DB\u3001\u7BA1\u7406\u8868" aria-hidden="true">#</a> \u56DB\u3001\u7BA1\u7406\u8868</h3><p>\u6570\u636E\u5E93\u8FDE\u63A5\u6210\u529F\u540E\uFF0C\u6700\u91CD\u8981\u7684\u8FD8\u662F\u64CD\u4F5C\u8868\u3002</p><p><strong>01\u3001\u67E5\u770B\u8868</strong></p><p>\u9009\u62E9\u4E00\u5F20\u8868\uFF0C\u53CC\u51FB\u540E\u5C31\u53EF\u4EE5\u770B\u5230\u8868\u7684\u5C5E\u6027\u4E86\uFF0C\u53EF\u4EE5\u67E5\u770B\u8868\u7684\u5217\u3001\u7EA6\u675F\uFF08\u4E3B\u952E\uFF09\u3001\u5916\u952E\u3001\u7D22\u5F15\u7B49\u7B49\u4FE1\u606F\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-12.png" alt=""></p><p>\u70B9\u51FB\u300CDDL\uFF08Data Definition Language\uFF0C\u6570\u636E\u5B9A\u4E49\u8BED\u8A00\uFF09\u300D\u53EF\u4EE5\u770B\u5230\u8BE6\u7EC6\u7684\u5EFA\u8868\u8BED\u53E5\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-13.png" alt=""></p><p>\u70B9\u51FB\u300C\u6570\u636E\u300D\u53EF\u4EE5\u67E5\u770B\u8868\u7684\u6570\u636E\uFF0C\u5E95\u90E8\u6709\u300C\u65B0\u589E\u300D\u3001\u300C\u4FEE\u6539\u300D\u3001\u300C\u5220\u9664\u300D\u7B49\u884C\u64CD\u4F5C\u6309\u94AE\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-14.png" alt=""></p><p>\u53EF\u4EE5\u5728\u9876\u90E8\u7684\u8FC7\u6EE4\u6846\u4E2D\u586B\u5199\u7B5B\u9009\u6761\u4EF6\uFF0C\u7136\u540E\u76F4\u63A5\u67E5\u8BE2\u7ED3\u679C\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-15.png" alt=""></p><p>\u5982\u679C\u4E0D\u60F3\u663E\u793A\u67D0\u4E00\u5217\u7684\u8BDD\uFF0C\u53EF\u4EE5\u76F4\u63A5\u70B9\u51FB\u300C\u81EA\u5B9A\u4E49\u7ED3\u679C\u96C6\u300D\u56FE\u8868\uFF0C\u5C06\u67D0\u4E2A\u5B57\u6BB5\u7684\u72B6\u6001\u8BBE\u7F6E\u4E3A\u4E0D\u53EF\u89C1\u5373\u53EF\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-16.png" alt=""></p><p><strong>02\u3001\u65B0\u589E\u8868</strong></p><p>\u5728\u5DE6\u4FA7\u9009\u62E9\u300C\u8868\u300D\uFF0C\u7136\u540E\u53F3\u952E\u9009\u62E9\u300C\u65B0\u5EFA\u8868\u300D\u5373\u53EF\u5EFA\u8868id\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-17.png" alt=""></p><p>\u4E4B\u540E\u5728\u53F3\u4FA7\u5217\u7684\u533A\u57DF\u53F3\u952E\uFF0C\u9009\u62E9\u300C\u65B0\u5EFA\u5217\u300D\u5373\u53EF\u6DFB\u52A0\u5B57\u6BB5\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-18.png" alt=""></p><p>\u6BD4\u5982\u8BF4\u6211\u4EEC\u65B0\u5EFA\u4E00\u4E2A\u4E3B\u952E ID\uFF0C\u5982\u4E0B\u56FE\u6240\u793A\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-19.png" alt=""></p><p>\u5728 DBeaver \u4E2D\uFF0C<code>[v]</code> \u8868\u793A\u771F\uFF0C<code>[]</code> \u8868\u793A\u5426\u3002\u7D27\u63A5\u7740\u5728\u300C\u7EA6\u675F\u300D\u91CC\u9009\u62E9 ID 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href="#\u516D\u3001\u5916\u89C2\u914D\u7F6E" aria-hidden="true">#</a> \u516D\u3001\u5916\u89C2\u914D\u7F6E</h3><p>\u53EF\u4EE5\u5728\u9996\u9009\u9879\u91CC\u5BF9\u5916\u89C2\u8FDB\u884C\u8BBE\u7F6E\uFF0C\u6BD4\u5982\u8BF4\u628A\u4E3B\u9898\u4FEE\u6539\u4E3A\u6697\u9ED1\u8272\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-26.png" alt=""></p><p>\u7136\u540E\u754C\u9762\u5C31\u53D8\u6210\u4E86\u6697\u9ED1\u7CFB\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-27.png" alt=""></p><p>\u8FD8\u53EF\u4EE5\u8BBE\u7F6E\u5B57\u4F53\u5927\u5C0F\u7B49\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-28.png" alt=""></p><p>\u4ECE\u6574\u4F53\u7684\u98CE\u683C\u6765\u770B\uFF0CDBeaver \u548C Eclipse \u6709\u4E9B\u7C7B\u4F3C\uFF0C\u4E8B\u5B9E\u4E0A\u4E5F\u7684\u786E\u5982\u6B64\uFF0CDBeaver \u662F\u57FA\u4E8E Eclipse \u5E73\u53F0\u6784\u5EFA\u7684\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-29.png" alt=""></p><h3 id="\u4E03\u3001\u603B\u7ED3" tabindex="-1"><a class="header-anchor" href="#\u4E03\u3001\u603B\u7ED3" aria-hidden="true">#</a> \u4E03\u3001\u603B\u7ED3</h3><p>\u603B\u4F53\u6765\u8BF4\uFF0CDBeaver\u662F\u4E00\u6B3E\u975E\u5E38\u4F18\u79C0\u7684\u5F00\u6E90\u6570\u636E\u5E93\u7BA1\u7406\u5DE5\u5177\u4E86\uFF0C\u529F\u80FD\u5F88\u5168\u9762\uFF0C\u65E5\u5E38\u7684\u5F00\u53D1\u57FA\u672C\u4E0A\u662F\u591F\u7528\u4E86\u3002\u5BF9\u6BD4\u6536\u8D39\u7684 Navicat \u548C DataGrip\uFF0C\u53EF\u4EE5\u8BF4\u975E\u5E38\u826F\u5FC3\u4E86\u3002\u5927\u5BB6\u5982\u679C\u9047\u5230\u6536\u8D39\u7248\u4E0D\u80FD\u4F7F\u7528\u7684\u65F6\u5019\uFF0C\u53EF\u4EE5\u6765\u4F53\u9A8C\u4E00\u4E0B\u793E\u533A\u7248 DBeaver\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p>',60);function G(z,H){const a=n("ExternalLinkIcon");return 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\u4E8C\u3001\u5B89\u88C5 DBeaver")],-1),k=e("p",null,"\u53EF\u4EE5\u901A\u8FC7 DBeaver \u5B98\u65B9\u4E0B\u8F7D\u5B89\u88C5\u5305\uFF0C\u4E5F\u53EF\u4EE5\u901A\u8FC7 GitHub \u4E0B\u8F7D release \u7248\u672C\u3002",-1),L=t("\u5B98\u65B9\u4E0B\u8F7D\u5730\u5740\uFF1A"),N={href:"https://dbeaver.io/download/",target:"_blank",rel:"noopener noreferrer"},S=t("https://dbeaver.io/download/"),M=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-3.png",alt:""})],-1),E=e("p",null,"\u6839\u636E\u81EA\u5DF1\u7535\u8111\u7684\u64CD\u4F5C\u7CFB\u7EDF\u4E0B\u8F7D\u5BF9\u5E94\u7684\u5B89\u88C5\u5305\uFF0C\u5B8C\u6574\u5B89\u88C5\u540E\uFF0C\u7B2C\u4E00\u6B65\u8981\u505A\u7684\u662F\u914D\u7F6E Maven \u955C\u50CF\uFF0C\u5426\u5219\u5728\u540E\u7EED\u4E0B\u8F7D\u6570\u636E\u5E93\u9A71\u52A8\u7684\u65F6\u5019\u4F1A\u975E\u5E38\u7684\u6162\u3002",-1),Q=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-4.png",alt:""})],-1),q=t("\u56E0\u4E3A DBeaver \u662F\u57FA\u4E8E "),I={href:"https://github.com/itwanger/toBeBetterJavaer/blob/master/docs/maven/maven.md",target:"_blank",rel:"noopener noreferrer"},w=t("Maven \u6784\u5EFA"),J=t("\u7684\uFF0C\u6570\u636E\u5E93\u9A71\u52A8\u4E5F\u5C31\u662F\u94FE\u63A5\u6570\u636E\u5E93\u7684 JDBC \u9A71\u52A8\u662F\u901A\u8FC7 Maven \u4ED3\u5E93\u4E0B\u8F7D\u7684\u3002\u9009\u62E9\u300C\u9996\u9009\u9879\u300D\u2192\u300CMaven\u300D\uFF0C\u6DFB\u52A0\u963F\u91CC\u4E91\u955C\u50CF\u5730\u5740\uFF1A"),V={href:"http://maven.aliyun.com/nexus/content/groups/public",target:"_blank",rel:"noopener noreferrer"},y=t("http://maven.aliyun.com/nexus/content/groups/public"),C=g('<p>\u548C\u914D\u7F6E Maven \u955C\u50CF\u4E00\u6837\uFF0C\u5982\u4E0B\u56FE\u6240\u793A\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-5.png" alt=""></p><p>\u914D\u7F6E\u5B8C\u6210\u540E\uFF0C\u8BB0\u5F97\u628A\u963F\u91CC\u4E91\u955C\u50CF\u4ED3\u5E93\u7F6E\u9876\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-6.png" alt=""></p><h3 id="\u4E09\u3001\u7BA1\u7406\u6570\u636E\u6E90" tabindex="-1"><a class="header-anchor" href="#\u4E09\u3001\u7BA1\u7406\u6570\u636E\u6E90" aria-hidden="true">#</a> \u4E09\u3001\u7BA1\u7406\u6570\u636E\u6E90</h3><p>\u50CF\u4F7F\u7528 Navicat \u4E00\u6837\uFF0C\u6211\u4EEC\u9700\u8981\u5148\u5EFA\u7ACB\u8FDE\u63A5\uFF0C\u8FD9\u91CC\u5C31\u4EE5 MySQL \u4E3A\u4F8B\u3002\u70B9\u51FB\u300C\u8FDE\u63A5\u300D\u5C0F\u56FE\u6807\uFF0C\u9009\u62E9\u6570\u636E\u5E93\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-7.png" alt=""></p><p>\u70B9\u51FB\u4E0B\u4E00\u6B65\uFF0C\u8FD9\u65F6\u5019\u9700\u8981\u586B\u5199\u6570\u636E\u5E93\u8FDE\u63A5\u4FE1\u606F\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-8.png" alt=""></p><p>\u70B9\u51FB\u300C\u6D4B\u8BD5\u94FE\u63A5\u300D\uFF0C\u5982\u679C\u4F7F\u7528\u9ED8\u8BA4\u7684 Maven \u4ED3\u5E93\u65F6\uFF0C\u4E0B\u8F7D\u9A71\u52A8\u4F1A\u975E\u5E38\u6162\uFF0C\u5982\u4E0B\u56FE\u6240\u793A\uFF0C\u8FD8\u5BB9\u6613\u5931\u8D25\u300C\u8E29\u8FC7\u7684\u5751\u5C31\u4E0D\u8981\u518D\u8E29\u4E86\u300D\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-9.png" alt=""></p><p>\u5982\u679C\u4F60\u524D\u9762\u6309\u7167\u6211\u8BF4\u7684\u914D\u7F6E\u4E86\u963F\u91CC\u4E91\u7684 Maven \u955C\u50CF\uFF0C\u7A0B\u5E8F\u5C31\u4E0D\u4E00\u6837\u4E86\uFF0C\u70B9\u4E86\u300C\u6D4B\u8BD5\u94FE\u63A5\u300D\uFF0C\u77AC\u95F4\u4F1A\u5F39\u51FA\u300C\u8FDE\u63A5\u5DF2\u6210\u529F\u300D\u7684\u63D0\u793A\u6846\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-10.png" alt=""></p><p>\u94FE\u63A5\u6210\u529F\u540E\uFF0C\u5C31\u53EF\u4EE5\u770B\u5230\u6570\u636E\u5E93\u4E2D\u7684\u8868\u554A\u3001\u89C6\u56FE\u554A\u3001\u7D22\u5F15\u554A\u7B49\u7B49\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-11.png" alt=""></p><h3 id="\u56DB\u3001\u7BA1\u7406\u8868" tabindex="-1"><a class="header-anchor" href="#\u56DB\u3001\u7BA1\u7406\u8868" aria-hidden="true">#</a> \u56DB\u3001\u7BA1\u7406\u8868</h3><p>\u6570\u636E\u5E93\u8FDE\u63A5\u6210\u529F\u540E\uFF0C\u6700\u91CD\u8981\u7684\u8FD8\u662F\u64CD\u4F5C\u8868\u3002</p><p><strong>01\u3001\u67E5\u770B\u8868</strong></p><p>\u9009\u62E9\u4E00\u5F20\u8868\uFF0C\u53CC\u51FB\u540E\u5C31\u53EF\u4EE5\u770B\u5230\u8868\u7684\u5C5E\u6027\u4E86\uFF0C\u53EF\u4EE5\u67E5\u770B\u8868\u7684\u5217\u3001\u7EA6\u675F\uFF08\u4E3B\u952E\uFF09\u3001\u5916\u952E\u3001\u7D22\u5F15\u7B49\u7B49\u4FE1\u606F\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-12.png" alt=""></p><p>\u70B9\u51FB\u300CDDL\uFF08Data Definition Language\uFF0C\u6570\u636E\u5B9A\u4E49\u8BED\u8A00\uFF09\u300D\u53EF\u4EE5\u770B\u5230\u8BE6\u7EC6\u7684\u5EFA\u8868\u8BED\u53E5\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-13.png" alt=""></p><p>\u70B9\u51FB\u300C\u6570\u636E\u300D\u53EF\u4EE5\u67E5\u770B\u8868\u7684\u6570\u636E\uFF0C\u5E95\u90E8\u6709\u300C\u65B0\u589E\u300D\u3001\u300C\u4FEE\u6539\u300D\u3001\u300C\u5220\u9664\u300D\u7B49\u884C\u64CD\u4F5C\u6309\u94AE\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-14.png" alt=""></p><p>\u53EF\u4EE5\u5728\u9876\u90E8\u7684\u8FC7\u6EE4\u6846\u4E2D\u586B\u5199\u7B5B\u9009\u6761\u4EF6\uFF0C\u7136\u540E\u76F4\u63A5\u67E5\u8BE2\u7ED3\u679C\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-15.png" alt=""></p><p>\u5982\u679C\u4E0D\u60F3\u663E\u793A\u67D0\u4E00\u5217\u7684\u8BDD\uFF0C\u53EF\u4EE5\u76F4\u63A5\u70B9\u51FB\u300C\u81EA\u5B9A\u4E49\u7ED3\u679C\u96C6\u300D\u56FE\u8868\uFF0C\u5C06\u67D0\u4E2A\u5B57\u6BB5\u7684\u72B6\u6001\u8BBE\u7F6E\u4E3A\u4E0D\u53EF\u89C1\u5373\u53EF\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-16.png" alt=""></p><p><strong>02\u3001\u65B0\u589E\u8868</strong></p><p>\u5728\u5DE6\u4FA7\u9009\u62E9\u300C\u8868\u300D\uFF0C\u7136\u540E\u53F3\u952E\u9009\u62E9\u300C\u65B0\u5EFA\u8868\u300D\u5373\u53EF\u5EFA\u8868id\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-17.png" alt=""></p><p>\u4E4B\u540E\u5728\u53F3\u4FA7\u5217\u7684\u533A\u57DF\u53F3\u952E\uFF0C\u9009\u62E9\u300C\u65B0\u5EFA\u5217\u300D\u5373\u53EF\u6DFB\u52A0\u5B57\u6BB5\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-18.png" alt=""></p><p>\u6BD4\u5982\u8BF4\u6211\u4EEC\u65B0\u5EFA\u4E00\u4E2A\u4E3B\u952E ID\uFF0C\u5982\u4E0B\u56FE\u6240\u793A\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-19.png" alt=""></p><p>\u5728 DBeaver \u4E2D\uFF0C<code>[v]</code> \u8868\u793A\u771F\uFF0C<code>[]</code> \u8868\u793A\u5426\u3002\u7D27\u63A5\u7740\u5728\u300C\u7EA6\u675F\u300D\u91CC\u9009\u62E9 ID \u5C06\u5176\u8BBE\u7F6E\u4E3A\u4E3B\u952E\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-20.png" alt=""></p><p>\u6700\u540E\u70B9\u51FB\u4FDD\u5B58\uFF0C\u4F1A\u5F39\u51FA\u4E00\u4E2A\u5EFA\u8868\u8BED\u53E5\u7684\u9884\u89C8\u6846\uFF0C\u70B9\u51FB\u300C\u6267\u884C\u300D\u5373\u53EF\u5B8C\u6210\u8868\u7684\u521B\u5EFA\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-21.png" alt=""></p><h3 id="\u4E94\u3001\u6267\u884C-sql" tabindex="-1"><a class="header-anchor" href="#\u4E94\u3001\u6267\u884C-sql" aria-hidden="true">#</a> \u4E94\u3001\u6267\u884C SQL</h3><p>\u53F3\u952E\u6570\u636E\u5E93\u8868\uFF0C\u9009\u62E9\u53F3\u952E\u83DC\u5355\u4E2D\u7684\u300CSQL \u7F16\u8F91\u5668\u300D\u53EF\u4EE5\u6253\u5F00 SQL \u7F16\u8F91\u9762\u677F\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-22.png" alt=""></p><p>\u7136\u540E\u7F16\u8F91 SQL \u8BED\u53E5\uFF0C\u70B9\u51FB\u8FD0\u884C\u7684\u5C0F\u56FE\u6807\u5C31\u53EF\u4EE5\u67E5\u8BE2\u6570\u636E\u4E86\u3002\u8FD9\u4E2A\u8FC7\u7A0B\u4F1A\u6709\u8BED\u6CD5\u63D0\u793A\uFF0C\u975E\u5E38 nice\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-23.png" alt=""></p><p>DBeaver \u6709\u4E00\u4E2A\u5F88\u4EAE\u773C\u7684\u64CD\u4F5C\u5C31\u662F\uFF0C\u53EF\u4EE5\u76F4\u63A5\u9009\u4E2D\u4E00\u6761\u7ED3\u679C\u96C6\uFF0C\u7136\u540E\u53F3\u952E\u751F\u6210 SQL\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-24.png" alt=""></p><p>\u6BD4\u5982\u8BF4 insert \u8BED\u53E5\uFF0C\u8FD9\u6837\u518D\u63D2\u5165\u4E00\u6761\u91CD\u590D\u6027\u5185\u5BB9\u7684\u65F6\u5019\u5C31\u975E\u5E38\u65B9\u4FBF\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-25.png" alt=""></p><h3 id="\u516D\u3001\u5916\u89C2\u914D\u7F6E" tabindex="-1"><a class="header-anchor" href="#\u516D\u3001\u5916\u89C2\u914D\u7F6E" aria-hidden="true">#</a> \u516D\u3001\u5916\u89C2\u914D\u7F6E</h3><p>\u53EF\u4EE5\u5728\u9996\u9009\u9879\u91CC\u5BF9\u5916\u89C2\u8FDB\u884C\u8BBE\u7F6E\uFF0C\u6BD4\u5982\u8BF4\u628A\u4E3B\u9898\u4FEE\u6539\u4E3A\u6697\u9ED1\u8272\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-26.png" alt=""></p><p>\u7136\u540E\u754C\u9762\u5C31\u53D8\u6210\u4E86\u6697\u9ED1\u7CFB\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-27.png" alt=""></p><p>\u8FD8\u53EF\u4EE5\u8BBE\u7F6E\u5B57\u4F53\u5927\u5C0F\u7B49\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-28.png" alt=""></p><p>\u4ECE\u6574\u4F53\u7684\u98CE\u683C\u6765\u770B\uFF0CDBeaver \u548C Eclipse \u6709\u4E9B\u7C7B\u4F3C\uFF0C\u4E8B\u5B9E\u4E0A\u4E5F\u7684\u786E\u5982\u6B64\uFF0CDBeaver \u662F\u57FA\u4E8E Eclipse \u5E73\u53F0\u6784\u5EFA\u7684\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-29.png" alt=""></p><h3 id="\u4E03\u3001\u603B\u7ED3" tabindex="-1"><a class="header-anchor" href="#\u4E03\u3001\u603B\u7ED3" aria-hidden="true">#</a> \u4E03\u3001\u603B\u7ED3</h3><p>\u603B\u4F53\u6765\u8BF4\uFF0CDBeaver\u662F\u4E00\u6B3E\u975E\u5E38\u4F18\u79C0\u7684\u5F00\u6E90\u6570\u636E\u5E93\u7BA1\u7406\u5DE5\u5177\u4E86\uFF0C\u529F\u80FD\u5F88\u5168\u9762\uFF0C\u65E5\u5E38\u7684\u5F00\u53D1\u57FA\u672C\u4E0A\u662F\u591F\u7528\u4E86\u3002\u5BF9\u6BD4\u6536\u8D39\u7684 Navicat \u548C DataGrip\uFF0C\u53EF\u4EE5\u8BF4\u975E\u5E38\u826F\u5FC3\u4E86\u3002\u5927\u5BB6\u5982\u679C\u9047\u5230\u6536\u8D39\u7248\u4E0D\u80FD\u4F7F\u7528\u7684\u65F6\u5019\uFF0C\u53EF\u4EE5\u6765\u4F53\u9A8C\u4E00\u4E0B\u793E\u533A\u7248 DBeaver\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p>',60);function G(z,H){const a=n("ExternalLinkIcon");return p(),c("div",null,[b,i,v,d,e("p",null,[h,e("a",m,[l,r(a)]),j]),e("blockquote",null,[e("p",null,[e("a",u,[_,r(a)])])]),D,B,f,x,k,e("blockquote",null,[e("p",null,[L,e("a",N,[S,r(a)])])]),M,E,Q,e("p",null,[q,e("a",I,[w,r(a)]),J]),e("blockquote",null,[e("p",null,[e("a",V,[y,r(a)])])]),C])}var O=o(s,[["render",G],["__file","DBeaver.html.vue"]]);export{O as default};
diff --git a/dist/assets/Filter-Interceptor-Listener.html.3a5897a3.js b/dist/assets/Filter-Interceptor-Listener.html.3a5897a3.js
new file mode 100644
index 00000000..93fa4af0
--- /dev/null
+++ b/dist/assets/Filter-Interceptor-Listener.html.3a5897a3.js
@@ -0,0 +1 @@
+const e={key:"v-fdb1bc82",path:"/springboot/Filter-Interceptor-Listener.html",title:"\u8FC7\u6EE4\u5668\u3001\u62E6\u622A\u5668\u3001\u76D1\u542C\u5668",lang:"zh-CN",frontmatter:{category:["Java\u4F01\u4E1A\u7EA7\u5F00\u53D1"],tag:["Spring Boot"],title:"\u8FC7\u6EE4\u5668\u3001\u62E6\u622A\u5668\u3001\u76D1\u542C\u5668",summary:"\u524D\u8A00 \u5148\u8BF4\u4F5C\u7528\u3002 \u8FC7\u6EE4\u5668\uFF08Filter\uFF09\uFF1A\u5F53\u6709\u4E00\u5806\u8BF7\u6C42\uFF0C\u53EA\u5E0C\u671B\u7B26\u5408\u9884\u671F\u7684\u8BF7\u6C42\u8FDB\u6765\u3002; \u62E6\u622A\u5668\uFF08Interceptor\uFF09\uFF1A\u60F3\u8981\u5E72\u6D89\u9884\u671F\u7684\u8BF7\u6C42\u3002; \u76D1\u542C\u5668\uFF08Listener\uFF09\uFF1A\u60F3\u8981\u76D1\u542C\u8FD9\u4E9B\u8BF7\u6C42\u5177\u4F53\u505A\u4E86\u4EC0\u4E48\u3002; \u518D\u8BF4\u533A\u522B\u3002 \u8FC7\u6EE4\u5668\u662F\u5728\u8BF7\u6C42\u8FDB\u5165\u5BB9\u5668\u540E\uFF0C\u4F46\u8FD8\u6CA1\u6709\u8FDB\u5165 Servlet \u4E4B\u524D\u8FDB\u884C\u9884\u5904\u7406\u7684\u3002\u5982\u4E0B\u56FE\u6240\u793A\u3002 \u62E6\u622A\u5668\u662F\u5728\u8BF7\u6C42\u8FDB\u5165\u63A7\u5236\u5668\uFF08Controller\uFF09 \u4E4B\u524D",head:[["meta",{property:"og:url",content:"https://tobebetterjavaer.com/springboot/Filter-Interceptor-Listener.html"}],["meta",{property:"og:site_name",content:"Java \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF"}],["meta",{property:"og:title",content:"\u8FC7\u6EE4\u5668\u3001\u62E6\u622A\u5668\u3001\u76D1\u542C\u5668"}],["meta",{property:"og:type",content:"article"}],["meta",{property:"og:updated_time",content:"2022-06-10T11:28:25.000Z"}],["meta",{property:"og:locale",content:"zh-CN"}],["meta",{property:"article:tag",content:"Spring Boot"}],["meta",{property:"article:modified_time",content:"2022-06-10T11:28:25.000Z"}]]},excerpt:"",headers:[{level:2,title:"\u524D\u8A00",slug:"\u524D\u8A00",children:[]},{level:2,title:"\u8FC7\u6EE4\u5668",slug:"\u8FC7\u6EE4\u5668",children:[]},{level:2,title:"\u62E6\u622A\u5668",slug:"\u62E6\u622A\u5668",children:[]},{level:2,title:"\u76D1\u542C\u5668",slug:"\u76D1\u542C\u5668",children:[]},{level:2,title:"\u6E90\u7801\u8DEF\u5F84\uFF1A",slug:"\u6E90\u7801\u8DEF\u5F84",children:[]}],git:{createdTime:1653092056e3,updatedTime:1654860505e3,contributors:[{name:"itwanger",email:"www.qing_gee@163.com",commits:3}]},readingTime:{minutes:5.87,words:1761},filePathRelative:"springboot/Filter-Interceptor-Listener.md"};export{e as data};
diff --git a/dist/assets/Filter-Interceptor-Listener.html.61c686d0.js b/dist/assets/Filter-Interceptor-Listener.html.7803e9df.js
similarity index 85%
rename from dist/assets/Filter-Interceptor-Listener.html.61c686d0.js
rename to dist/assets/Filter-Interceptor-Listener.html.7803e9df.js
index a2800899..80282596 100644
--- a/dist/assets/Filter-Interceptor-Listener.html.61c686d0.js
+++ b/dist/assets/Filter-Interceptor-Listener.html.7803e9df.js
@@ -1,4 +1,4 @@
-import{_ as o}from"./plugin-vue_export-helper.21dcd24c.js";import{r as e,o as c,c as l,a as n,b as a,w as i,e as u,d as s}from"./app.a0271b9c.js";const r={},k=u(`<h3 id="\u524D\u8A00" tabindex="-1"><a class="header-anchor" href="#\u524D\u8A00" aria-hidden="true">#</a> \u524D\u8A00</h3><p>\u5148\u8BF4\u4F5C\u7528\u3002</p><ul><li>\u8FC7\u6EE4\u5668\uFF08Filter\uFF09\uFF1A\u5F53\u6709\u4E00\u5806\u8BF7\u6C42\uFF0C\u53EA\u5E0C\u671B\u7B26\u5408\u9884\u671F\u7684\u8BF7\u6C42\u8FDB\u6765\u3002</li><li>\u62E6\u622A\u5668\uFF08Interceptor\uFF09\uFF1A\u60F3\u8981\u5E72\u6D89\u9884\u671F\u7684\u8BF7\u6C42\u3002</li><li>\u76D1\u542C\u5668\uFF08Listener\uFF09\uFF1A\u60F3\u8981\u76D1\u542C\u8FD9\u4E9B\u8BF7\u6C42\u5177\u4F53\u505A\u4E86\u4EC0\u4E48\u3002</li></ul><p>\u518D\u8BF4\u533A\u522B\u3002</p><p>\u8FC7\u6EE4\u5668\u662F\u5728\u8BF7\u6C42\u8FDB\u5165\u5BB9\u5668\u540E\uFF0C\u4F46\u8FD8\u6CA1\u6709\u8FDB\u5165 Servlet \u4E4B\u524D\u8FDB\u884C\u9884\u5904\u7406\u7684\u3002\u5982\u4E0B\u56FE\u6240\u793A\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/Filter-Interceptor-Listener-2a28621b-2cc1-4d29-87a1-cf6a01d95443.png" alt=""></p><p>\u62E6\u622A\u5668\u662F\u5728\u8BF7\u6C42\u8FDB\u5165\u63A7\u5236\u5668\uFF08Controller\uFF09 \u4E4B\u524D\u8FDB\u884C\u9884\u5904\u7406\u7684\u3002</p><p>\u865A\u7EBF\u5185\u5C31\u662F\u8FC7\u6EE4\u5668\u548C\u62E6\u622A\u5668\u7684\u4F5C\u7528\u8303\u56F4\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/Filter-Interceptor-Listener-dd48851b-c123-4fd8-b82d-9ae87b33745d.png" alt=""></p><p>\u8FC7\u6EE4\u5668\u4F9D\u8D56\u4E8E Servlet \u5BB9\u5668\uFF0C\u800C\u62E6\u622A\u5668\u4F9D\u8D56\u4E8E Spring \u7684 IoC \u5BB9\u5668\uFF0C\u56E0\u6B64\u53EF\u4EE5\u901A\u8FC7\u6CE8\u5165\u7684\u65B9\u5F0F\u83B7\u53D6\u5BB9\u5668\u5F53\u4E2D\u7684\u5BF9\u8C61\u3002</p><p>\u76D1\u542C\u5668\u7528\u4E8E\u76D1\u542C Web \u5E94\u7528\u4E2D\u67D0\u4E9B\u5BF9\u8C61\u7684\u521B\u5EFA\u3001\u9500\u6BC1\u3001\u589E\u52A0\u3001\u4FEE\u6539\u3001\u5220\u9664\u7B49\u52A8\u4F5C\uFF0C\u7136\u540E\u505A\u51FA\u76F8\u5E94\u7684\u5904\u7406\u3002</p><h3 id="\u8FC7\u6EE4\u5668" tabindex="-1"><a class="header-anchor" href="#\u8FC7\u6EE4\u5668" aria-hidden="true">#</a> \u8FC7\u6EE4\u5668</h3><ul><li>\u8FC7\u6EE4\u654F\u611F\u8BCD\u6C47\uFF08\u9632\u6B62sql\u6CE8\u5165\uFF09</li><li>\u8BBE\u7F6E\u5B57\u7B26\u7F16\u7801</li><li>URL\u7EA7\u522B\u7684\u6743\u9650\u8BBF\u95EE\u63A7\u5236</li><li>\u538B\u7F29\u54CD\u5E94\u4FE1\u606F</li></ul><p>\u8FC7\u6EE4\u5668\u7684\u521B\u5EFA\u548C\u9500\u6BC1\u90FD\u7531 Web \u670D\u52A1\u5668\u8D1F\u8D23\uFF0CWeb \u5E94\u7528\u7A0B\u5E8F\u542F\u52A8\u7684\u65F6\u5019\uFF0C\u521B\u5EFA\u8FC7\u6EE4\u5668\u5BF9\u8C61\uFF0C\u4E3A\u540E\u7EED\u7684\u8BF7\u6C42\u8FC7\u6EE4\u505A\u597D\u51C6\u5907\u3002</p><p>\u8FC7\u6EE4\u5668\u53EF\u4EE5\u6709\u5F88\u591A\u4E2A\uFF0C\u4E00\u4E2A\u4E2A\u8FC7\u6EE4\u5668\u7EC4\u5408\u8D77\u6765\u5C31\u6210\u4E86 FilterChain\uFF0C\u4E5F\u5C31\u662F\u8FC7\u6EE4\u5668\u94FE\u3002</p><p>\u5728 Spring \u4E2D\uFF0C\u8FC7\u6EE4\u5668\u90FD\u9ED8\u8BA4\u7EE7\u627F\u4E86 OncePerRequestFilter\uFF0C\u987E\u540D\u601D\u4E49\uFF0COncePerRequestFilter \u7684\u4F5C\u7528\u5C31\u662F\u786E\u4FDD\u4E00\u6B21\u8BF7\u6C42\u53EA\u901A\u8FC7\u4E00\u6B21\u8FC7\u6EE4\u5668\uFF0C\u800C\u4E0D\u91CD\u590D\u6267\u884C\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/Filter-Interceptor-Listener-aaa1c537-c8ed-4c5d-b27f-93c1409f2748.png" alt=""></p><p>\u5728\u7F16\u7A0B\u55B5\u5B9E\u6218\u9879\u76EE\u4E2D\uFF0C\u6211\u4EEC\u5C31\u662F\u901A\u8FC7\u7EE7\u627F OncePerRequestFilter \u6765\u5B9E\u73B0 JWT \u767B\u5F55\u6388\u6743\u8FC7\u6EE4\u7684\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">JwtAuthenticationTokenFilter</span> <span class="token keyword">extends</span> <span class="token class-name">OncePerRequestFilter</span> <span class="token punctuation">{</span>
+import{_ as e}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o,c,a as n,b as t,e as l,d as s}from"./app.615e41d8.js";const i={},u=l(`<h2 id="\u524D\u8A00" tabindex="-1"><a class="header-anchor" href="#\u524D\u8A00" aria-hidden="true">#</a> \u524D\u8A00</h2><p>\u5148\u8BF4\u4F5C\u7528\u3002</p><ul><li>\u8FC7\u6EE4\u5668\uFF08Filter\uFF09\uFF1A\u5F53\u6709\u4E00\u5806\u8BF7\u6C42\uFF0C\u53EA\u5E0C\u671B\u7B26\u5408\u9884\u671F\u7684\u8BF7\u6C42\u8FDB\u6765\u3002</li><li>\u62E6\u622A\u5668\uFF08Interceptor\uFF09\uFF1A\u60F3\u8981\u5E72\u6D89\u9884\u671F\u7684\u8BF7\u6C42\u3002</li><li>\u76D1\u542C\u5668\uFF08Listener\uFF09\uFF1A\u60F3\u8981\u76D1\u542C\u8FD9\u4E9B\u8BF7\u6C42\u5177\u4F53\u505A\u4E86\u4EC0\u4E48\u3002</li></ul><p>\u518D\u8BF4\u533A\u522B\u3002</p><p>\u8FC7\u6EE4\u5668\u662F\u5728\u8BF7\u6C42\u8FDB\u5165\u5BB9\u5668\u540E\uFF0C\u4F46\u8FD8\u6CA1\u6709\u8FDB\u5165 Servlet \u4E4B\u524D\u8FDB\u884C\u9884\u5904\u7406\u7684\u3002\u5982\u4E0B\u56FE\u6240\u793A\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/Filter-Interceptor-Listener-2a28621b-2cc1-4d29-87a1-cf6a01d95443.png" alt=""></p><p>\u62E6\u622A\u5668\u662F\u5728\u8BF7\u6C42\u8FDB\u5165\u63A7\u5236\u5668\uFF08Controller\uFF09 \u4E4B\u524D\u8FDB\u884C\u9884\u5904\u7406\u7684\u3002</p><p>\u865A\u7EBF\u5185\u5C31\u662F\u8FC7\u6EE4\u5668\u548C\u62E6\u622A\u5668\u7684\u4F5C\u7528\u8303\u56F4\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/Filter-Interceptor-Listener-dd48851b-c123-4fd8-b82d-9ae87b33745d.png" alt=""></p><p>\u8FC7\u6EE4\u5668\u4F9D\u8D56\u4E8E Servlet \u5BB9\u5668\uFF0C\u800C\u62E6\u622A\u5668\u4F9D\u8D56\u4E8E Spring \u7684 IoC \u5BB9\u5668\uFF0C\u56E0\u6B64\u53EF\u4EE5\u901A\u8FC7\u6CE8\u5165\u7684\u65B9\u5F0F\u83B7\u53D6\u5BB9\u5668\u5F53\u4E2D\u7684\u5BF9\u8C61\u3002</p><p>\u76D1\u542C\u5668\u7528\u4E8E\u76D1\u542C Web \u5E94\u7528\u4E2D\u67D0\u4E9B\u5BF9\u8C61\u7684\u521B\u5EFA\u3001\u9500\u6BC1\u3001\u589E\u52A0\u3001\u4FEE\u6539\u3001\u5220\u9664\u7B49\u52A8\u4F5C\uFF0C\u7136\u540E\u505A\u51FA\u76F8\u5E94\u7684\u5904\u7406\u3002</p><h2 id="\u8FC7\u6EE4\u5668" tabindex="-1"><a class="header-anchor" href="#\u8FC7\u6EE4\u5668" aria-hidden="true">#</a> \u8FC7\u6EE4\u5668</h2><ul><li>\u8FC7\u6EE4\u654F\u611F\u8BCD\u6C47\uFF08\u9632\u6B62sql\u6CE8\u5165\uFF09</li><li>\u8BBE\u7F6E\u5B57\u7B26\u7F16\u7801</li><li>URL\u7EA7\u522B\u7684\u6743\u9650\u8BBF\u95EE\u63A7\u5236</li><li>\u538B\u7F29\u54CD\u5E94\u4FE1\u606F</li></ul><p>\u8FC7\u6EE4\u5668\u7684\u521B\u5EFA\u548C\u9500\u6BC1\u90FD\u7531 Web \u670D\u52A1\u5668\u8D1F\u8D23\uFF0CWeb \u5E94\u7528\u7A0B\u5E8F\u542F\u52A8\u7684\u65F6\u5019\uFF0C\u521B\u5EFA\u8FC7\u6EE4\u5668\u5BF9\u8C61\uFF0C\u4E3A\u540E\u7EED\u7684\u8BF7\u6C42\u8FC7\u6EE4\u505A\u597D\u51C6\u5907\u3002</p><p>\u8FC7\u6EE4\u5668\u53EF\u4EE5\u6709\u5F88\u591A\u4E2A\uFF0C\u4E00\u4E2A\u4E2A\u8FC7\u6EE4\u5668\u7EC4\u5408\u8D77\u6765\u5C31\u6210\u4E86 FilterChain\uFF0C\u4E5F\u5C31\u662F\u8FC7\u6EE4\u5668\u94FE\u3002</p><p>\u5728 Spring \u4E2D\uFF0C\u8FC7\u6EE4\u5668\u90FD\u9ED8\u8BA4\u7EE7\u627F\u4E86 OncePerRequestFilter\uFF0C\u987E\u540D\u601D\u4E49\uFF0COncePerRequestFilter \u7684\u4F5C\u7528\u5C31\u662F\u786E\u4FDD\u4E00\u6B21\u8BF7\u6C42\u53EA\u901A\u8FC7\u4E00\u6B21\u8FC7\u6EE4\u5668\uFF0C\u800C\u4E0D\u91CD\u590D\u6267\u884C\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/Filter-Interceptor-Listener-aaa1c537-c8ed-4c5d-b27f-93c1409f2748.png" alt=""></p><p>\u5728\u7F16\u7A0B\u55B5\u5B9E\u6218\u9879\u76EE\u4E2D\uFF0C\u6211\u4EEC\u5C31\u662F\u901A\u8FC7\u7EE7\u627F OncePerRequestFilter \u6765\u5B9E\u73B0 JWT \u767B\u5F55\u6388\u6743\u8FC7\u6EE4\u7684\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">JwtAuthenticationTokenFilter</span> <span class="token keyword">extends</span> <span class="token class-name">OncePerRequestFilter</span> <span class="token punctuation">{</span>
 	<span class="token annotation punctuation">@Override</span>
     <span class="token keyword">protected</span> <span class="token keyword">void</span> <span class="token function">doFilterInternal</span><span class="token punctuation">(</span><span class="token class-name">HttpServletRequest</span> request<span class="token punctuation">,</span>
                                     <span class="token class-name">HttpServletResponse</span> response<span class="token punctuation">,</span>
@@ -51,7 +51,7 @@ import{_ as o}from"./plugin-vue_export-helper.21dcd24c.js";import{r as e,o as c,
         <span class="token class-name">Filter</span><span class="token punctuation">.</span><span class="token keyword">super</span><span class="token punctuation">.</span><span class="token function">destroy</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
     <span class="token punctuation">}</span>
 <span class="token punctuation">}</span>
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>@WebFilter \u6CE8\u89E3\u7528\u4E8E\u5C06\u4E00\u4E2A\u7C7B\u58F0\u660E\u4E3A\u8FC7\u6EE4\u5668\uFF0CurlPatterns \u5C5E\u6027\u7528\u6765\u6307\u5B9A\u8FC7\u6EE4\u5668\u7684 URL \u5339\u914D\u6A21\u5F0F\uFF0CfilterName \u7528\u6765\u5B9A\u4E49\u8FC7\u6EE4\u5668\u7684\u540D\u5B57\u3002</p><p>MyFilter \u8FC7\u6EE4\u5668\u7684\u903B\u8F91\u975E\u5E38\u7B80\u5355\uFF0C\u91CD\u5199\u4E86 Filter \u7684\u4E09\u4E2A\u65B9\u6CD5\uFF0C\u5728 doFilter \u65B9\u6CD5\u4E2D\u52A0\u5165\u4E86\u65F6\u95F4\u6233\u7684\u8BB0\u5F55\u3002</p><p>\u7136\u540E\u6211\u4EEC\u5728\u9879\u76EE\u5165\u53E3\u7C7B\u4E0A\u52A0\u4E0A @ServletComponentScan \u6CE8\u89E3\uFF0C\u8FD9\u6837\u8FC7\u6EE4\u5668\u5C31\u4F1A\u81EA\u52A8\u6CE8\u518C\u3002</p><p>\u542F\u52A8\u670D\u52A1\u5668\uFF0C\u8BBF\u95EE\u4EFB\u610F\u7684 URL\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/Filter-Interceptor-Listener-c865b6d2-30d3-435b-a930-c732caed17ce.png" alt=""></p><h3 id="\u62E6\u622A\u5668" tabindex="-1"><a class="header-anchor" href="#\u62E6\u622A\u5668" aria-hidden="true">#</a> \u62E6\u622A\u5668</h3><ul><li>\u767B\u5F55\u9A8C\u8BC1\uFF0C\u5224\u65AD\u7528\u6237\u662F\u5426\u767B\u5F55</li><li>\u6743\u9650\u9A8C\u8BC1\uFF0C\u5224\u65AD\u7528\u6237\u662F\u5426\u6709\u6743\u9650\u8BBF\u95EE\u8D44\u6E90\uFF0C\u5982\u6821\u9A8Ctoken</li><li>\u65E5\u5FD7\u8BB0\u5F55\uFF0C\u8BB0\u5F55\u8BF7\u6C42\u64CD\u4F5C\u65E5\u5FD7\uFF08\u7528\u6237ip\uFF0C\u8BBF\u95EE\u65F6\u95F4\u7B49\uFF09\uFF0C\u4EE5\u4FBF\u7EDF\u8BA1\u8BF7\u6C42\u8BBF\u95EE\u91CF</li><li>\u5904\u7406cookie\u3001\u672C\u5730\u5316\u3001\u56FD\u9645\u5316\u3001\u4E3B\u9898\u7B49</li><li>\u6027\u80FD\u76D1\u63A7\uFF0C\u76D1\u63A7\u8BF7\u6C42\u5904\u7406\u65F6\u957F\u7B49</li></ul><p>\u6211\u4EEC\u6765\u5199\u4E00\u4E2A\u7B80\u5355\u7684\u62E6\u622A\u5668 LoggerInterceptor\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token annotation punctuation">@Slf4j</span>
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>@WebFilter \u6CE8\u89E3\u7528\u4E8E\u5C06\u4E00\u4E2A\u7C7B\u58F0\u660E\u4E3A\u8FC7\u6EE4\u5668\uFF0CurlPatterns \u5C5E\u6027\u7528\u6765\u6307\u5B9A\u8FC7\u6EE4\u5668\u7684 URL \u5339\u914D\u6A21\u5F0F\uFF0CfilterName \u7528\u6765\u5B9A\u4E49\u8FC7\u6EE4\u5668\u7684\u540D\u5B57\u3002</p><p>MyFilter \u8FC7\u6EE4\u5668\u7684\u903B\u8F91\u975E\u5E38\u7B80\u5355\uFF0C\u91CD\u5199\u4E86 Filter \u7684\u4E09\u4E2A\u65B9\u6CD5\uFF0C\u5728 doFilter \u65B9\u6CD5\u4E2D\u52A0\u5165\u4E86\u65F6\u95F4\u6233\u7684\u8BB0\u5F55\u3002</p><p>\u7136\u540E\u6211\u4EEC\u5728\u9879\u76EE\u5165\u53E3\u7C7B\u4E0A\u52A0\u4E0A @ServletComponentScan \u6CE8\u89E3\uFF0C\u8FD9\u6837\u8FC7\u6EE4\u5668\u5C31\u4F1A\u81EA\u52A8\u6CE8\u518C\u3002</p><p>\u542F\u52A8\u670D\u52A1\u5668\uFF0C\u8BBF\u95EE\u4EFB\u610F\u7684 URL\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/Filter-Interceptor-Listener-c865b6d2-30d3-435b-a930-c732caed17ce.png" alt=""></p><h2 id="\u62E6\u622A\u5668" tabindex="-1"><a class="header-anchor" href="#\u62E6\u622A\u5668" aria-hidden="true">#</a> \u62E6\u622A\u5668</h2><ul><li>\u767B\u5F55\u9A8C\u8BC1\uFF0C\u5224\u65AD\u7528\u6237\u662F\u5426\u767B\u5F55</li><li>\u6743\u9650\u9A8C\u8BC1\uFF0C\u5224\u65AD\u7528\u6237\u662F\u5426\u6709\u6743\u9650\u8BBF\u95EE\u8D44\u6E90\uFF0C\u5982\u6821\u9A8Ctoken</li><li>\u65E5\u5FD7\u8BB0\u5F55\uFF0C\u8BB0\u5F55\u8BF7\u6C42\u64CD\u4F5C\u65E5\u5FD7\uFF08\u7528\u6237ip\uFF0C\u8BBF\u95EE\u65F6\u95F4\u7B49\uFF09\uFF0C\u4EE5\u4FBF\u7EDF\u8BA1\u8BF7\u6C42\u8BBF\u95EE\u91CF</li><li>\u5904\u7406cookie\u3001\u672C\u5730\u5316\u3001\u56FD\u9645\u5316\u3001\u4E3B\u9898\u7B49</li><li>\u6027\u80FD\u76D1\u63A7\uFF0C\u76D1\u63A7\u8BF7\u6C42\u5904\u7406\u65F6\u957F\u7B49</li></ul><p>\u6211\u4EEC\u6765\u5199\u4E00\u4E2A\u7B80\u5355\u7684\u62E6\u622A\u5668 LoggerInterceptor\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token annotation punctuation">@Slf4j</span>
 <span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">LoggerInterceptor</span> <span class="token keyword">implements</span> <span class="token class-name">HandlerInterceptor</span> <span class="token punctuation">{</span>
     <span class="token annotation punctuation">@Override</span>
     <span class="token keyword">public</span> <span class="token keyword">boolean</span> <span class="token function">preHandle</span><span class="token punctuation">(</span><span class="token class-name">HttpServletRequest</span> request<span class="token punctuation">,</span> <span class="token class-name">HttpServletResponse</span> response<span class="token punctuation">,</span> <span class="token class-name">Object</span> handler<span class="token punctuation">)</span> <span class="token keyword">throws</span> <span class="token class-name">Exception</span> <span class="token punctuation">{</span>
@@ -122,4 +122,4 @@ import{_ as o}from"./plugin-vue_export-helper.21dcd24c.js";import{r as e,o as c,
     <span class="token keyword">private</span> <span class="token class-name">Object</span> <span class="token function">getParameter</span><span class="token punctuation">(</span><span class="token class-name">Method</span> method<span class="token punctuation">,</span> <span class="token class-name">Object</span><span class="token punctuation">[</span><span class="token punctuation">]</span> args<span class="token punctuation">)</span> <span class="token punctuation">{</span>
     <span class="token punctuation">}</span>
 <span class="token punctuation">}</span>
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>\u901A\u8FC7\u62E6\u622A\u540E\u7684\u8BF7\u6C42\u4FE1\u606F\u5927\u6982\u662F\u8FD9\u6837\u7684\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/Filter-Interceptor-Listener-7a4b219d-bd3e-435e-a2dc-93f4fe4e8cc2.png" alt=""></p><h3 id="\u76D1\u542C\u5668" tabindex="-1"><a class="header-anchor" href="#\u76D1\u542C\u5668" aria-hidden="true">#</a> \u76D1\u542C\u5668</h3><p>\u6839\u636E\u76D1\u542C\u5BF9\u8C61\u53EF\u4EE5\u628A\u76D1\u542C\u5668\u5206\u4E3A 3 \u7C7B\uFF1A</p><hr>`,53),d=s("\u66F4\u591A\u5185\u5BB9\uFF0C\u53EA\u9488\u5BF9\u300AJava \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF\u300B\u661F\u7403\u7528\u6237\u5F00\u653E\uFF0C\u9700\u8981\u7684\u5C0F\u4F19\u4F34\u53EF\u4EE5"),v=s("\u6233\u94FE\u63A5\u{1F517}"),m=s("\u52A0\u5165\u6211\u4EEC\u7684\u661F\u7403\uFF0C\u4E00\u8D77\u5B66\u4E60\uFF0C\u4E00\u8D77\u5377\u3002\u3002"),b=n("strong",null,"\u7F16\u7A0B\u55B5",-1),g=s("\u{1F431}\u662F\u4E00\u4E2A Spring Boot+Vue \u7684\u524D\u540E\u7AEF\u5206\u79BB\u9879\u76EE\uFF0C\u878D\u5408\u4E86\u5E02\u9762\u4E0A\u7EDD\u5927\u591A\u6570\u6D41\u884C\u7684\u6280\u672F\u8981\u70B9\u3002\u901A\u8FC7\u5B66\u4E60\u5B9E\u6218\u9879\u76EE\uFF0C\u4F60\u53EF\u4EE5\u5C06\u6240\u5B66\u7684\u77E5\u8BC6\u901A\u8FC7\u5B9E\u8DF5\u8FDB\u884C\u68C0\u9A8C\u3001\u4F60\u53EF\u4EE5\u62D3\u5BBD\u81EA\u5DF1\u7684\u6280\u672F\u8FB9\u754C\uFF0C\u4F60\u53EF\u4EE5\u638C\u63E1\u4E00\u4E2A\u771F\u6B63\u7684\u5B9E\u6218\u9879\u76EE\u662F\u5982\u4F55\u4ECE 0 \u5230 1 \u7684\u3002"),h=n("hr",null,null,-1),w=n("h3",{id:"\u6E90\u7801\u8DEF\u5F84",tabindex:"-1"},[n("a",{class:"header-anchor",href:"#\u6E90\u7801\u8DEF\u5F84","aria-hidden":"true"},"#"),s(" \u6E90\u7801\u8DEF\u5F84\uFF1A")],-1),f=s("\u7F16\u7A0B\u55B5\uFF1A"),y={href:"https://github.com/itwanger/coding-more",target:"_blank",rel:"noopener noreferrer"},q=s("https://github.com/itwanger/coding-more"),_=s("\u8FC7\u6EE4\u5668\uFF0C\u62E6\u622A\u5668\u3001\u76D1\u542C\u5668\u4E13\u7528\uFF1A"),j={href:"https://github.com/itwanger/codingmore-learning/tree/main/codingmore-filter-interceptor-listener",target:"_blank",rel:"noopener noreferrer"},S=s("https://github.com/itwanger/coding-more"),x=n("p",null,[n("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png",alt:""})],-1);function L(R,C){const p=e("RouterLink"),t=e("ExternalLinkIcon");return c(),l("div",null,[k,n("p",null,[d,a(p,{to:"/springboot/docs/zhishixingqiu/"},{default:i(()=>[v]),_:1}),m,b,g]),h,w,n("blockquote",null,[n("ul",null,[n("li",null,[f,n("a",y,[q,a(t)])]),n("li",null,[_,n("a",j,[S,a(t)])])])]),x])}var I=o(r,[["render",L],["__file","Filter-Interceptor-Listener.html.vue"]]);export{I as default};
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>\u901A\u8FC7\u62E6\u622A\u540E\u7684\u8BF7\u6C42\u4FE1\u606F\u5927\u6982\u662F\u8FD9\u6837\u7684\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/Filter-Interceptor-Listener-7a4b219d-bd3e-435e-a2dc-93f4fe4e8cc2.png" alt=""></p><h2 id="\u76D1\u542C\u5668" tabindex="-1"><a class="header-anchor" href="#\u76D1\u542C\u5668" aria-hidden="true">#</a> \u76D1\u542C\u5668</h2><p>\u6839\u636E\u76D1\u542C\u5BF9\u8C61\u53EF\u4EE5\u628A\u76D1\u542C\u5668\u5206\u4E3A 3 \u7C7B\uFF1A</p><hr>`,53),r=s("\u66F4\u591A\u5185\u5BB9\uFF0C\u53EA\u9488\u5BF9\u300AJava \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF\u300B\u661F\u7403\u7528\u6237\u5F00\u653E\uFF0C\u9700\u8981\u7684\u5C0F\u4F19\u4F34\u53EF\u4EE5"),k={href:"https://tobebetterjavaer.com/zhishixingqiu/",target:"_blank",rel:"noopener noreferrer"},d=s("\u6233\u94FE\u63A5\u{1F517}"),v=s("\u52A0\u5165\u6211\u4EEC\u7684\u661F\u7403\uFF0C\u4E00\u8D77\u5B66\u4E60\uFF0C\u4E00\u8D77\u5377\u3002\u3002"),m=n("strong",null,"\u7F16\u7A0B\u55B5",-1),b=s("\u{1F431}\u662F\u4E00\u4E2A Spring Boot+Vue \u7684\u524D\u540E\u7AEF\u5206\u79BB\u9879\u76EE\uFF0C\u878D\u5408\u4E86\u5E02\u9762\u4E0A\u7EDD\u5927\u591A\u6570\u6D41\u884C\u7684\u6280\u672F\u8981\u70B9\u3002\u901A\u8FC7\u5B66\u4E60\u5B9E\u6218\u9879\u76EE\uFF0C\u4F60\u53EF\u4EE5\u5C06\u6240\u5B66\u7684\u77E5\u8BC6\u901A\u8FC7\u5B9E\u8DF5\u8FDB\u884C\u68C0\u9A8C\u3001\u4F60\u53EF\u4EE5\u62D3\u5BBD\u81EA\u5DF1\u7684\u6280\u672F\u8FB9\u754C\uFF0C\u4F60\u53EF\u4EE5\u638C\u63E1\u4E00\u4E2A\u771F\u6B63\u7684\u5B9E\u6218\u9879\u76EE\u662F\u5982\u4F55\u4ECE 0 \u5230 1 \u7684\u3002"),g=n("hr",null,null,-1),h=n("h2",{id:"\u6E90\u7801\u8DEF\u5F84",tabindex:"-1"},[n("a",{class:"header-anchor",href:"#\u6E90\u7801\u8DEF\u5F84","aria-hidden":"true"},"#"),s(" \u6E90\u7801\u8DEF\u5F84\uFF1A")],-1),f=s("\u7F16\u7A0B\u55B5\uFF1A"),w={href:"https://github.com/itwanger/coding-more",target:"_blank",rel:"noopener noreferrer"},y=s("https://github.com/itwanger/coding-more"),q=s("\u8FC7\u6EE4\u5668\uFF0C\u62E6\u622A\u5668\u3001\u76D1\u542C\u5668\u4E13\u7528\uFF1A"),j={href:"https://github.com/itwanger/codingmore-learning/tree/main/codingmore-filter-interceptor-listener",target:"_blank",rel:"noopener noreferrer"},_=s("https://github.com/itwanger/coding-more"),S=n("p",null,[n("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png",alt:""})],-1);function x(L,R){const a=p("ExternalLinkIcon");return o(),c("div",null,[u,n("p",null,[r,n("a",k,[d,t(a)]),v,m,b]),g,h,n("blockquote",null,[n("ul",null,[n("li",null,[f,n("a",w,[y,t(a)])]),n("li",null,[q,n("a",j,[_,t(a)])])])]),S])}var H=e(i,[["render",x],["__file","Filter-Interceptor-Listener.html.vue"]]);export{H as default};
diff --git a/dist/assets/Filter-Interceptor-Listener.html.d4211e38.js b/dist/assets/Filter-Interceptor-Listener.html.d4211e38.js
deleted file mode 100644
index c117c48d..00000000
--- a/dist/assets/Filter-Interceptor-Listener.html.d4211e38.js
+++ /dev/null
@@ -1 +0,0 @@
-const e={key:"v-fdb1bc82",path:"/springboot/Filter-Interceptor-Listener.html",title:"Spring Boot \u6574\u5408 Thymeleaf \u6A21\u677F\u5F15\u64CE",lang:"zh-CN",frontmatter:{category:["Java\u4F01\u4E1A\u7EA7\u5F00\u53D1"],tag:["Spring Boot"],title:"Spring Boot \u6574\u5408 Thymeleaf \u6A21\u677F\u5F15\u64CE",summary:"\u524D\u8A00 \u5148\u8BF4\u4F5C\u7528\u3002 \u8FC7\u6EE4\u5668\uFF08Filter\uFF09\uFF1A\u5F53\u6709\u4E00\u5806\u8BF7\u6C42\uFF0C\u53EA\u5E0C\u671B\u7B26\u5408\u9884\u671F\u7684\u8BF7\u6C42\u8FDB\u6765\u3002; \u62E6\u622A\u5668\uFF08Interceptor\uFF09\uFF1A\u60F3\u8981\u5E72\u6D89\u9884\u671F\u7684\u8BF7\u6C42\u3002; \u76D1\u542C\u5668\uFF08Listener\uFF09\uFF1A\u60F3\u8981\u76D1\u542C\u8FD9\u4E9B\u8BF7\u6C42\u5177\u4F53\u505A\u4E86\u4EC0\u4E48\u3002; \u518D\u8BF4\u533A\u522B\u3002 \u8FC7\u6EE4\u5668\u662F\u5728\u8BF7\u6C42\u8FDB\u5165\u5BB9\u5668\u540E\uFF0C\u4F46\u8FD8\u6CA1\u6709\u8FDB\u5165 Servlet \u4E4B\u524D\u8FDB\u884C\u9884\u5904\u7406\u7684\u3002\u5982\u4E0B\u56FE\u6240\u793A\u3002 \u62E6\u622A\u5668\u662F\u5728\u8BF7\u6C42\u8FDB\u5165\u63A7\u5236\u5668\uFF08Controller\uFF09 \u4E4B\u524D",head:[["meta",{property:"og:url",content:"https://tobebetterjavaer.com/springboot/Filter-Interceptor-Listener.html"}],["meta",{property:"og:site_name",content:"Java \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF"}],["meta",{property:"og:title",content:"Spring Boot \u6574\u5408 Thymeleaf \u6A21\u677F\u5F15\u64CE"}],["meta",{property:"og:type",content:"article"}],["meta",{property:"og:updated_time",content:"2022-05-21T16:06:08.000Z"}],["meta",{property:"og:locale",content:"zh-CN"}],["meta",{property:"article:tag",content:"Spring Boot"}],["meta",{property:"article:modified_time",content:"2022-05-21T16:06:08.000Z"}]]},excerpt:"",headers:[{level:3,title:"\u524D\u8A00",slug:"\u524D\u8A00",children:[]},{level:3,title:"\u8FC7\u6EE4\u5668",slug:"\u8FC7\u6EE4\u5668",children:[]},{level:3,title:"\u62E6\u622A\u5668",slug:"\u62E6\u622A\u5668",children:[]},{level:3,title:"\u76D1\u542C\u5668",slug:"\u76D1\u542C\u5668",children:[]},{level:3,title:"\u6E90\u7801\u8DEF\u5F84\uFF1A",slug:"\u6E90\u7801\u8DEF\u5F84",children:[]}],git:{createdTime:1653092056e3,updatedTime:1653149168e3,contributors:[{name:"itwanger",email:"www.qing_gee@163.com",commits:2}]},readingTime:{minutes:5.87,words:1760},filePathRelative:"springboot/Filter-Interceptor-Listener.md"};export{e as data};
diff --git a/dist/assets/Lambda.html.16e88b8a.js b/dist/assets/Lambda.html.bd1566d3.js
similarity index 99%
rename from dist/assets/Lambda.html.16e88b8a.js
rename to dist/assets/Lambda.html.bd1566d3.js
index 54863db7..4bcd917b 100644
--- a/dist/assets/Lambda.html.16e88b8a.js
+++ b/dist/assets/Lambda.html.bd1566d3.js
@@ -1,4 +1,4 @@
-import{_ as p}from"./plugin-vue_export-helper.21dcd24c.js";import{r as e,o as c,c as o,a as n,b as i,e as a,d as s}from"./app.a0271b9c.js";const l={},u=a(`<h1 id="\u6DF1\u5165\u6D45\u51FA-java-8-lambda\u8868\u8FBE\u5F0F" tabindex="-1"><a class="header-anchor" href="#\u6DF1\u5165\u6D45\u51FA-java-8-lambda\u8868\u8FBE\u5F0F" aria-hidden="true">#</a> \u6DF1\u5165\u6D45\u51FA Java 8 Lambda\u8868\u8FBE\u5F0F</h1><p>\u4ECA\u5929\u5206\u4EAB\u7684\u4E3B\u9898\u662F\u300ALambda \u8868\u8FBE\u5F0F\u5165\u95E8\u300B\uFF0C\u8FD9\u4E5F\u662F\u4E4B\u524D\u4E00\u4E9B\u8BFB\u8005\u7559\u8A00\u5F3A\u70C8\u8981\u6C42\u6211\u5199\u4E00\u5199\u7684\uFF0C\u4E0D\u597D\u610F\u601D\uFF0C\u8BA9\u4F60\u4EEC\u4E45\u7B49\u4E86\uFF0C\u73B0\u5728\u6765\u6EE1\u8DB3\u4F60\u4EEC\uFF0C\u4E3A\u65F6\u4E0D\u665A\u5427\uFF1F</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/java8/Lambda-1.jpg" alt=""></p><h3 id="_01\u3001\u521D\u8BC6-lambda" tabindex="-1"><a class="header-anchor" href="#_01\u3001\u521D\u8BC6-lambda" aria-hidden="true">#</a> 01\u3001\u521D\u8BC6 Lambda</h3><p>Lambda \u8868\u8FBE\u5F0F\u63CF\u8FF0\u4E86\u4E00\u4E2A\u4EE3\u7801\u5757\uFF08\u6216\u8005\u53EB\u533F\u540D\u65B9\u6CD5\uFF09\uFF0C\u53EF\u4EE5\u5C06\u5176\u4F5C\u4E3A\u53C2\u6570\u4F20\u9012\u7ED9\u6784\u9020\u65B9\u6CD5\u6216\u8005\u666E\u901A\u65B9\u6CD5\u4EE5\u4FBF\u540E\u7EED\u6267\u884C\u3002\u8003\u8651\u4E0B\u9762\u8FD9\u6BB5\u4EE3\u7801\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">-&gt;</span> <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">&quot;\u6C89\u9ED8\u738B\u4E8C&quot;</span><span class="token punctuation">)</span>
+import{_ as p}from"./plugin-vue_export-helper.21dcd24c.js";import{r as e,o as c,c as o,a as n,b as i,e as a,d as s}from"./app.615e41d8.js";const l={},u=a(`<h1 id="\u6DF1\u5165\u6D45\u51FA-java-8-lambda\u8868\u8FBE\u5F0F" tabindex="-1"><a class="header-anchor" href="#\u6DF1\u5165\u6D45\u51FA-java-8-lambda\u8868\u8FBE\u5F0F" aria-hidden="true">#</a> \u6DF1\u5165\u6D45\u51FA Java 8 Lambda\u8868\u8FBE\u5F0F</h1><p>\u4ECA\u5929\u5206\u4EAB\u7684\u4E3B\u9898\u662F\u300ALambda \u8868\u8FBE\u5F0F\u5165\u95E8\u300B\uFF0C\u8FD9\u4E5F\u662F\u4E4B\u524D\u4E00\u4E9B\u8BFB\u8005\u7559\u8A00\u5F3A\u70C8\u8981\u6C42\u6211\u5199\u4E00\u5199\u7684\uFF0C\u4E0D\u597D\u610F\u601D\uFF0C\u8BA9\u4F60\u4EEC\u4E45\u7B49\u4E86\uFF0C\u73B0\u5728\u6765\u6EE1\u8DB3\u4F60\u4EEC\uFF0C\u4E3A\u65F6\u4E0D\u665A\u5427\uFF1F</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/java8/Lambda-1.jpg" alt=""></p><h3 id="_01\u3001\u521D\u8BC6-lambda" tabindex="-1"><a class="header-anchor" href="#_01\u3001\u521D\u8BC6-lambda" aria-hidden="true">#</a> 01\u3001\u521D\u8BC6 Lambda</h3><p>Lambda \u8868\u8FBE\u5F0F\u63CF\u8FF0\u4E86\u4E00\u4E2A\u4EE3\u7801\u5757\uFF08\u6216\u8005\u53EB\u533F\u540D\u65B9\u6CD5\uFF09\uFF0C\u53EF\u4EE5\u5C06\u5176\u4F5C\u4E3A\u53C2\u6570\u4F20\u9012\u7ED9\u6784\u9020\u65B9\u6CD5\u6216\u8005\u666E\u901A\u65B9\u6CD5\u4EE5\u4FBF\u540E\u7EED\u6267\u884C\u3002\u8003\u8651\u4E0B\u9762\u8FD9\u6BB5\u4EE3\u7801\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">-&gt;</span> <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">&quot;\u6C89\u9ED8\u738B\u4E8C&quot;</span><span class="token punctuation">)</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>\u6765\u4ECE\u5DE6\u5230\u53F3\u89E3\u91CA\u4E00\u4E0B\uFF0C<code>()</code> \u4E3A Lambda \u8868\u8FBE\u5F0F\u7684\u53C2\u6570\u5217\u8868\uFF08\u672C\u4F8B\u4E2D\u6CA1\u6709\u53C2\u6570\uFF09\uFF0C<code>-&gt;</code> \u6807\u8BC6\u8FD9\u4E32\u4EE3\u7801\u4E3A Lambda \u8868\u8FBE\u5F0F\uFF08\u4E5F\u5C31\u662F\u8BF4\uFF0C\u770B\u5230 <code>-&gt;</code> \u5C31\u77E5\u9053\u8FD9\u662F Lambda\uFF09\uFF0C<code>System.out.println(&quot;\u6C89\u9ED8\u738B\u4E8C&quot;)</code> \u4E3A\u8981\u6267\u884C\u7684\u4EE3\u7801\uFF0C\u5373\u5C06\u201C\u6C89\u9ED8\u738B\u4E8C\u201D\u6253\u5370\u5230\u6807\u51C6\u8F93\u51FA\u6D41\u3002</p><p>\u6709\u70B9 Java \u57FA\u7840\u7684\u540C\u5B66\u5E94\u8BE5\u4E0D\u4F1A\u5BF9 Runnable \u63A5\u53E3\u611F\u5230\u964C\u751F\uFF0C\u8FD9\u662F\u591A\u7EBF\u7A0B\u7684\u4E00\u4E2A\u57FA\u7840\u63A5\u53E3\uFF0C\u5B83\u7684\u5B9A\u4E49\u5982\u4E0B\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token annotation punctuation">@FunctionalInterface</span>
 <span class="token keyword">public</span> <span class="token keyword">interface</span> <span class="token class-name">Runnable</span>
 <span class="token punctuation">{</span>
diff --git a/dist/assets/Layout.fbcb8daf.js b/dist/assets/Layout.2f241dd5.js
similarity index 80%
rename from dist/assets/Layout.fbcb8daf.js
rename to dist/assets/Layout.2f241dd5.js
index 71f29210..4f4617fd 100644
--- a/dist/assets/Layout.fbcb8daf.js
+++ b/dist/assets/Layout.2f241dd5.js
@@ -1 +1 @@
-import{f as m,h as e,T as i,m as u,g as p,n as d,p as c,q as f,r,s as v,t as g}from"./app.a0271b9c.js";import{S as h}from"./SkipLink.e761490e.js";var b=m({name:"FadeSlideY",setup(s,{slots:a}){const o=u(),t=o.resolve,l=o.pending;return()=>e(i,{name:"fade-slide-y",mode:"out-in",onBeforeEnter:t,onBeforeLeave:l},()=>{var n;return(n=a.default)==null?void 0:n.call(a)})}}),L=m({name:"Layout",setup(){const s=g(),a=p(),o=v(),t=d();return c(),f(()=>a.value.blog.sidebarDisplay||s.value.blog.sidebarDisplay||"mobile"),()=>[e(h),e(r("CommonWrapper"),{},{default:()=>t.value.home?e(r("HomePage")):e(b,()=>e(r("NormalPage"),{key:o.value.path}))})]}});export{L as default};
+import{f as m,h as e,T as i,m as u,g as p,n as d,p as c,q as f,r,s as v,t as g}from"./app.615e41d8.js";import{S as h}from"./SkipLink.a2c3a90f.js";var b=m({name:"FadeSlideY",setup(s,{slots:a}){const o=u(),t=o.resolve,l=o.pending;return()=>e(i,{name:"fade-slide-y",mode:"out-in",onBeforeEnter:t,onBeforeLeave:l},()=>{var n;return(n=a.default)==null?void 0:n.call(a)})}}),L=m({name:"Layout",setup(){const s=g(),a=p(),o=v(),t=d();return c(),f(()=>a.value.blog.sidebarDisplay||s.value.blog.sidebarDisplay||"mobile"),()=>[e(h),e(r("CommonWrapper"),{},{default:()=>t.value.home?e(r("HomePage")):e(b,()=>e(r("NormalPage"),{key:o.value.path}))})]}});export{L as default};
diff --git a/dist/assets/LockSupport.html.55f27ea8.js b/dist/assets/LockSupport.html.5ea98b89.js
similarity index 99%
rename from dist/assets/LockSupport.html.55f27ea8.js
rename to dist/assets/LockSupport.html.5ea98b89.js
index c6e3ae15..dba73c8a 100644
--- a/dist/assets/LockSupport.html.55f27ea8.js
+++ b/dist/assets/LockSupport.html.5ea98b89.js
@@ -1,4 +1,4 @@
-import{_ as p}from"./plugin-vue_export-helper.21dcd24c.js";import{r as e,o,c,a as n,b as s,e as l,d as t}from"./app.a0271b9c.js";const i={},u=l(`<h1 id="\u6DF1\u5165\u7406\u89E3java\u5E76\u53D1\u7EBF\u7A0B\u963B\u585E\u5524\u9192\u7C7Blocksupport" tabindex="-1"><a class="header-anchor" href="#\u6DF1\u5165\u7406\u89E3java\u5E76\u53D1\u7EBF\u7A0B\u963B\u585E\u5524\u9192\u7C7Blocksupport" aria-hidden="true">#</a> \u6DF1\u5165\u7406\u89E3Java\u5E76\u53D1\u7EBF\u7A0B\u963B\u585E\u5524\u9192\u7C7BLockSupport</h1><p>LockSupport\u4F4D\u4E8Ejava.util.concurrent.locks\u5305\u4E0B\uFF0C\u6709\u5174\u8DA3\u7684\u53EF\u4EE5\u76F4\u63A5\u53BB\u770B\u6E90\u7801\uFF0C\u8BE5\u7C7B\u7684\u65B9\u6CD5\u5E76\u4E0D\u662F\u5F88\u591A\u3002LockSupprot\u662F\u7EBF\u7A0B\u7684\u963B\u585E\u539F\u8BED\uFF0C\u7528\u6765\u963B\u585E\u7EBF\u7A0B\u548C\u5524\u9192\u7EBF\u7A0B\u3002\u6BCF\u4E2A\u4F7F\u7528LockSupport\u7684\u7EBF\u7A0B\u90FD\u4F1A\u4E0E\u4E00\u4E2A\u8BB8\u53EF\u5173\u8054\uFF0C\u5982\u679C\u8BE5\u8BB8\u53EF\u53EF\u7528\uFF0C\u5E76\u4E14\u53EF\u5728\u7EBF\u7A0B\u4E2D\u4F7F\u7528\uFF0C\u5219\u8C03\u7528park()\u5C06\u4F1A\u7ACB\u5373\u8FD4\u56DE\uFF0C\u5426\u5219\u53EF\u80FD\u963B\u585E\u3002\u5982\u679C\u8BB8\u53EF\u5C1A\u4E0D\u53EF\u7528\uFF0C\u5219\u53EF\u4EE5\u8C03\u7528 unpark \u4F7F\u5176\u53EF\u7528\u3002\u4F46\u662F\u6CE8\u610F\u8BB8\u53EF<strong>\u4E0D\u53EF\u91CD\u5165</strong>\uFF0C\u4E5F\u5C31\u662F\u8BF4\u53EA\u80FD\u8C03\u7528\u4E00\u6B21park()\u65B9\u6CD5\uFF0C\u5426\u5219\u4F1A\u4E00\u76F4\u963B\u585E\u3002</p><p>LockSupport\u4E2D\u7684\u65B9\u6CD5\u4E0D\u591A\uFF0C\u8FD9\u91CC\u5C06\u8FD9\u4E9B\u65B9\u6CD5\u505A\u4E00\u4E2A\u603B\u7ED3\uFF1A</p><h2 id="\u963B\u585E\u7EBF\u7A0B" tabindex="-1"><a class="header-anchor" href="#\u963B\u585E\u7EBF\u7A0B" aria-hidden="true">#</a> <strong>\u963B\u585E\u7EBF\u7A0B</strong></h2><ol><li><code>void park()</code>\uFF1A\u963B\u585E\u5F53\u524D\u7EBF\u7A0B\uFF0C\u5982\u679C\u8C03\u7528unpark\u65B9\u6CD5\u6216\u8005\u5F53\u524D\u7EBF\u7A0B\u88AB\u4E2D\u65AD\uFF0C\u4ECE\u80FD\u4ECEpark()\u65B9\u6CD5\u4E2D\u8FD4\u56DE</li><li><code>void park(Object blocker)</code>\uFF1A\u529F\u80FD\u540C\u65B9\u6CD51\uFF0C\u5165\u53C2\u589E\u52A0\u4E00\u4E2AObject\u5BF9\u8C61\uFF0C\u7528\u6765\u8BB0\u5F55\u5BFC\u81F4\u7EBF\u7A0B\u963B\u585E\u7684\u963B\u585E\u5BF9\u8C61\uFF0C\u65B9\u4FBF\u8FDB\u884C\u95EE\u9898\u6392\u67E5\uFF1B</li><li><code>void parkNanos(long nanos)</code>\uFF1A\u963B\u585E\u5F53\u524D\u7EBF\u7A0B\uFF0C\u6700\u957F\u4E0D\u8D85\u8FC7nanos\u7EB3\u79D2\uFF0C\u589E\u52A0\u4E86\u8D85\u65F6\u8FD4\u56DE\u7684\u7279\u6027\uFF1B</li><li><code>void parkNanos(Object blocker, long nanos)</code>\uFF1A\u529F\u80FD\u540C\u65B9\u6CD53\uFF0C\u5165\u53C2\u589E\u52A0\u4E00\u4E2AObject\u5BF9\u8C61\uFF0C\u7528\u6765\u8BB0\u5F55\u5BFC\u81F4\u7EBF\u7A0B\u963B\u585E\u7684\u963B\u585E\u5BF9\u8C61\uFF0C\u65B9\u4FBF\u8FDB\u884C\u95EE\u9898\u6392\u67E5\uFF1B</li><li><code>void parkUntil(long deadline)</code>\uFF1A\u963B\u585E\u5F53\u524D\u7EBF\u7A0B\uFF0C\u77E5\u9053deadline\uFF1B</li><li><code>void parkUntil(Object blocker, long deadline)</code>\uFF1A\u529F\u80FD\u540C\u65B9\u6CD55\uFF0C\u5165\u53C2\u589E\u52A0\u4E00\u4E2AObject\u5BF9\u8C61\uFF0C\u7528\u6765\u8BB0\u5F55\u5BFC\u81F4\u7EBF\u7A0B\u963B\u585E\u7684\u963B\u585E\u5BF9\u8C61\uFF0C\u65B9\u4FBF\u8FDB\u884C\u95EE\u9898\u6392\u67E5\uFF1B</li></ol><h2 id="\u5524\u9192\u7EBF\u7A0B" tabindex="-1"><a class="header-anchor" href="#\u5524\u9192\u7EBF\u7A0B" aria-hidden="true">#</a> <strong>\u5524\u9192\u7EBF\u7A0B</strong></h2><p><code>void unpark(Thread thread)</code>:\u5524\u9192\u5904\u4E8E\u963B\u585E\u72B6\u6001\u7684\u6307\u5B9A\u7EBF\u7A0B</p><p>\u5B9E\u9645\u4E0ALockSupport\u963B\u585E\u548C\u5524\u9192\u7EBF\u7A0B\u7684\u529F\u80FD\u662F\u4F9D\u8D56\u4E8Esun.misc.Unsafe\uFF0C\u8FD9\u662F\u4E00\u4E2A\u5F88\u5E95\u5C42\u7684\u7C7B\uFF0C\u6709\u5174\u8DA3\u7684\u53EF\u4EE5\u53BB\u67E5\u9605\u8D44\u6599\uFF0C\u6BD4\u5982park()\u65B9\u6CD5\u7684\u529F\u80FD\u5B9E\u73B0\u5219\u662F\u9760unsafe.park()\u65B9\u6CD5\u3002</p><p>\u53E6\u5916\u5728\u963B\u585E\u7EBF\u7A0B\u8FD9\u4E00\u7CFB\u5217\u65B9\u6CD5\u4E2D\u8FD8\u6709\u4E00\u4E2A\u5F88\u6709\u610F\u601D\u7684\u73B0\u8C61\u5C31\u662F\uFF0C\u6BCF\u4E2A\u65B9\u6CD5\u90FD\u4F1A\u65B0\u589E\u4E00\u4E2A\u5E26\u6709Object\u7684\u963B\u585E\u5BF9\u8C61\u7684\u91CD\u8F7D\u65B9\u6CD5\u3002\u90A3\u4E48\u589E\u52A0\u4E86\u4E00\u4E2AObject\u5BF9\u8C61\u7684\u5165\u53C2\u4F1A\u6709\u4EC0\u4E48\u4E0D\u540C\u7684\u5730\u65B9\u4E86\uFF1F\u793A\u4F8B\u4EE3\u7801\u5F88\u7B80\u5355\u5C31\u4E0D\u8BF4\u4E86\uFF0C\u76F4\u63A5\u770Bdump\u7EBF\u7A0B\u7684\u4FE1\u606F\u3002</p><p><strong>\u8C03\u7528park()\u65B9\u6CD5dump\u7EBF\u7A0B</strong>\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token string">&quot;main&quot;</span> #<span class="token number">1</span> prio<span class="token operator">=</span><span class="token number">5</span> os_prio<span class="token operator">=</span><span class="token number">0</span> tid<span class="token operator">=</span><span class="token number">0x02cdcc00</span> nid<span class="token operator">=</span><span class="token number">0x2b48</span> waiting on condition <span class="token punctuation">[</span><span class="token number">0x00d6f000</span><span class="token punctuation">]</span>
+import{_ as p}from"./plugin-vue_export-helper.21dcd24c.js";import{r as e,o,c,a as n,b as s,e as l,d as t}from"./app.615e41d8.js";const i={},u=l(`<h1 id="\u6DF1\u5165\u7406\u89E3java\u5E76\u53D1\u7EBF\u7A0B\u963B\u585E\u5524\u9192\u7C7Blocksupport" tabindex="-1"><a class="header-anchor" href="#\u6DF1\u5165\u7406\u89E3java\u5E76\u53D1\u7EBF\u7A0B\u963B\u585E\u5524\u9192\u7C7Blocksupport" aria-hidden="true">#</a> \u6DF1\u5165\u7406\u89E3Java\u5E76\u53D1\u7EBF\u7A0B\u963B\u585E\u5524\u9192\u7C7BLockSupport</h1><p>LockSupport\u4F4D\u4E8Ejava.util.concurrent.locks\u5305\u4E0B\uFF0C\u6709\u5174\u8DA3\u7684\u53EF\u4EE5\u76F4\u63A5\u53BB\u770B\u6E90\u7801\uFF0C\u8BE5\u7C7B\u7684\u65B9\u6CD5\u5E76\u4E0D\u662F\u5F88\u591A\u3002LockSupprot\u662F\u7EBF\u7A0B\u7684\u963B\u585E\u539F\u8BED\uFF0C\u7528\u6765\u963B\u585E\u7EBF\u7A0B\u548C\u5524\u9192\u7EBF\u7A0B\u3002\u6BCF\u4E2A\u4F7F\u7528LockSupport\u7684\u7EBF\u7A0B\u90FD\u4F1A\u4E0E\u4E00\u4E2A\u8BB8\u53EF\u5173\u8054\uFF0C\u5982\u679C\u8BE5\u8BB8\u53EF\u53EF\u7528\uFF0C\u5E76\u4E14\u53EF\u5728\u7EBF\u7A0B\u4E2D\u4F7F\u7528\uFF0C\u5219\u8C03\u7528park()\u5C06\u4F1A\u7ACB\u5373\u8FD4\u56DE\uFF0C\u5426\u5219\u53EF\u80FD\u963B\u585E\u3002\u5982\u679C\u8BB8\u53EF\u5C1A\u4E0D\u53EF\u7528\uFF0C\u5219\u53EF\u4EE5\u8C03\u7528 unpark \u4F7F\u5176\u53EF\u7528\u3002\u4F46\u662F\u6CE8\u610F\u8BB8\u53EF<strong>\u4E0D\u53EF\u91CD\u5165</strong>\uFF0C\u4E5F\u5C31\u662F\u8BF4\u53EA\u80FD\u8C03\u7528\u4E00\u6B21park()\u65B9\u6CD5\uFF0C\u5426\u5219\u4F1A\u4E00\u76F4\u963B\u585E\u3002</p><p>LockSupport\u4E2D\u7684\u65B9\u6CD5\u4E0D\u591A\uFF0C\u8FD9\u91CC\u5C06\u8FD9\u4E9B\u65B9\u6CD5\u505A\u4E00\u4E2A\u603B\u7ED3\uFF1A</p><h2 id="\u963B\u585E\u7EBF\u7A0B" tabindex="-1"><a class="header-anchor" href="#\u963B\u585E\u7EBF\u7A0B" aria-hidden="true">#</a> <strong>\u963B\u585E\u7EBF\u7A0B</strong></h2><ol><li><code>void park()</code>\uFF1A\u963B\u585E\u5F53\u524D\u7EBF\u7A0B\uFF0C\u5982\u679C\u8C03\u7528unpark\u65B9\u6CD5\u6216\u8005\u5F53\u524D\u7EBF\u7A0B\u88AB\u4E2D\u65AD\uFF0C\u4ECE\u80FD\u4ECEpark()\u65B9\u6CD5\u4E2D\u8FD4\u56DE</li><li><code>void park(Object blocker)</code>\uFF1A\u529F\u80FD\u540C\u65B9\u6CD51\uFF0C\u5165\u53C2\u589E\u52A0\u4E00\u4E2AObject\u5BF9\u8C61\uFF0C\u7528\u6765\u8BB0\u5F55\u5BFC\u81F4\u7EBF\u7A0B\u963B\u585E\u7684\u963B\u585E\u5BF9\u8C61\uFF0C\u65B9\u4FBF\u8FDB\u884C\u95EE\u9898\u6392\u67E5\uFF1B</li><li><code>void parkNanos(long nanos)</code>\uFF1A\u963B\u585E\u5F53\u524D\u7EBF\u7A0B\uFF0C\u6700\u957F\u4E0D\u8D85\u8FC7nanos\u7EB3\u79D2\uFF0C\u589E\u52A0\u4E86\u8D85\u65F6\u8FD4\u56DE\u7684\u7279\u6027\uFF1B</li><li><code>void parkNanos(Object blocker, long nanos)</code>\uFF1A\u529F\u80FD\u540C\u65B9\u6CD53\uFF0C\u5165\u53C2\u589E\u52A0\u4E00\u4E2AObject\u5BF9\u8C61\uFF0C\u7528\u6765\u8BB0\u5F55\u5BFC\u81F4\u7EBF\u7A0B\u963B\u585E\u7684\u963B\u585E\u5BF9\u8C61\uFF0C\u65B9\u4FBF\u8FDB\u884C\u95EE\u9898\u6392\u67E5\uFF1B</li><li><code>void parkUntil(long deadline)</code>\uFF1A\u963B\u585E\u5F53\u524D\u7EBF\u7A0B\uFF0C\u77E5\u9053deadline\uFF1B</li><li><code>void parkUntil(Object blocker, long deadline)</code>\uFF1A\u529F\u80FD\u540C\u65B9\u6CD55\uFF0C\u5165\u53C2\u589E\u52A0\u4E00\u4E2AObject\u5BF9\u8C61\uFF0C\u7528\u6765\u8BB0\u5F55\u5BFC\u81F4\u7EBF\u7A0B\u963B\u585E\u7684\u963B\u585E\u5BF9\u8C61\uFF0C\u65B9\u4FBF\u8FDB\u884C\u95EE\u9898\u6392\u67E5\uFF1B</li></ol><h2 id="\u5524\u9192\u7EBF\u7A0B" tabindex="-1"><a class="header-anchor" href="#\u5524\u9192\u7EBF\u7A0B" aria-hidden="true">#</a> <strong>\u5524\u9192\u7EBF\u7A0B</strong></h2><p><code>void unpark(Thread thread)</code>:\u5524\u9192\u5904\u4E8E\u963B\u585E\u72B6\u6001\u7684\u6307\u5B9A\u7EBF\u7A0B</p><p>\u5B9E\u9645\u4E0ALockSupport\u963B\u585E\u548C\u5524\u9192\u7EBF\u7A0B\u7684\u529F\u80FD\u662F\u4F9D\u8D56\u4E8Esun.misc.Unsafe\uFF0C\u8FD9\u662F\u4E00\u4E2A\u5F88\u5E95\u5C42\u7684\u7C7B\uFF0C\u6709\u5174\u8DA3\u7684\u53EF\u4EE5\u53BB\u67E5\u9605\u8D44\u6599\uFF0C\u6BD4\u5982park()\u65B9\u6CD5\u7684\u529F\u80FD\u5B9E\u73B0\u5219\u662F\u9760unsafe.park()\u65B9\u6CD5\u3002</p><p>\u53E6\u5916\u5728\u963B\u585E\u7EBF\u7A0B\u8FD9\u4E00\u7CFB\u5217\u65B9\u6CD5\u4E2D\u8FD8\u6709\u4E00\u4E2A\u5F88\u6709\u610F\u601D\u7684\u73B0\u8C61\u5C31\u662F\uFF0C\u6BCF\u4E2A\u65B9\u6CD5\u90FD\u4F1A\u65B0\u589E\u4E00\u4E2A\u5E26\u6709Object\u7684\u963B\u585E\u5BF9\u8C61\u7684\u91CD\u8F7D\u65B9\u6CD5\u3002\u90A3\u4E48\u589E\u52A0\u4E86\u4E00\u4E2AObject\u5BF9\u8C61\u7684\u5165\u53C2\u4F1A\u6709\u4EC0\u4E48\u4E0D\u540C\u7684\u5730\u65B9\u4E86\uFF1F\u793A\u4F8B\u4EE3\u7801\u5F88\u7B80\u5355\u5C31\u4E0D\u8BF4\u4E86\uFF0C\u76F4\u63A5\u770Bdump\u7EBF\u7A0B\u7684\u4FE1\u606F\u3002</p><p><strong>\u8C03\u7528park()\u65B9\u6CD5dump\u7EBF\u7A0B</strong>\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token string">&quot;main&quot;</span> #<span class="token number">1</span> prio<span class="token operator">=</span><span class="token number">5</span> os_prio<span class="token operator">=</span><span class="token number">0</span> tid<span class="token operator">=</span><span class="token number">0x02cdcc00</span> nid<span class="token operator">=</span><span class="token number">0x2b48</span> waiting on condition <span class="token punctuation">[</span><span class="token number">0x00d6f000</span><span class="token punctuation">]</span>
    <span class="token class-name"><span class="token namespace">java<span class="token punctuation">.</span>lang<span class="token punctuation">.</span></span>Thread<span class="token punctuation">.</span>State</span><span class="token operator">:</span> WAITING <span class="token punctuation">(</span>parking<span class="token punctuation">)</span>
         at <span class="token class-name"><span class="token namespace">sun<span class="token punctuation">.</span>misc<span class="token punctuation">.</span></span>Unsafe</span><span class="token punctuation">.</span><span class="token function">park</span><span class="token punctuation">(</span><span class="token class-name">Native</span> <span class="token class-name">Method</span><span class="token punctuation">)</span>
         at <span class="token class-name"><span class="token namespace">java<span class="token punctuation">.</span>util<span class="token punctuation">.</span>concurrent<span class="token punctuation">.</span>locks<span class="token punctuation">.</span></span>LockSupport</span><span class="token punctuation">.</span><span class="token function">park</span><span class="token punctuation">(</span><span class="token class-name">LockSupport</span><span class="token punctuation">.</span>java<span class="token operator">:</span><span class="token number">304</span><span class="token punctuation">)</span>
diff --git a/dist/assets/Overriding.html.e0ccdfe1.js b/dist/assets/Overriding.html.d8235770.js
similarity index 99%
rename from dist/assets/Overriding.html.e0ccdfe1.js
rename to dist/assets/Overriding.html.d8235770.js
index fdd8413a..d2cffe6d 100644
--- a/dist/assets/Overriding.html.e0ccdfe1.js
+++ b/dist/assets/Overriding.html.d8235770.js
@@ -1,4 +1,4 @@
-import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e}from"./app.a0271b9c.js";const p={},t=e(`<h1 id="java\u91CD\u5199-overriding-\u65F6\u5E94\u5F53\u9075\u5B88\u768411\u6761\u89C4\u5219" tabindex="-1"><a class="header-anchor" href="#java\u91CD\u5199-overriding-\u65F6\u5E94\u5F53\u9075\u5B88\u768411\u6761\u89C4\u5219" aria-hidden="true">#</a> Java\u91CD\u5199\uFF08Overriding\uFF09\u65F6\u5E94\u5F53\u9075\u5B88\u768411\u6761\u89C4\u5219</h1><p>\u91CD\u5199\uFF08Overriding\uFF09\u7B97\u662F Java \u4E2D\u4E00\u4E2A\u975E\u5E38\u91CD\u8981\u7684\u6982\u5FF5\uFF0C\u7406\u89E3\u91CD\u5199\u5230\u5E95\u662F\u4EC0\u4E48\u5BF9\u6BCF\u4E2A Java \u7A0B\u5E8F\u5458\u6765\u8BF4\u90FD\u81F3\u5173\u91CD\u8981\uFF0C\u8FD9\u7BC7\u6587\u7AE0\u5C31\u6765\u7ED9\u5927\u5BB6\u8BF4\u8BF4\u91CD\u5199\u8FC7\u7A0B\u4E2D\u5E94\u5F53\u9075\u5B88\u7684 12 \u6761\u89C4\u5219\u3002</p><h3 id="_01\u3001\u4EC0\u4E48\u662F\u91CD\u5199" tabindex="-1"><a class="header-anchor" href="#_01\u3001\u4EC0\u4E48\u662F\u91CD\u5199" aria-hidden="true">#</a> 01\u3001\u4EC0\u4E48\u662F\u91CD\u5199\uFF1F</h3><p>\u91CD\u5199\u5E26\u6765\u4E86\u4E00\u79CD\u975E\u5E38\u91CD\u8981\u7684\u80FD\u529B\uFF0C\u53EF\u4EE5\u8BA9\u5B50\u7C7B\u91CD\u65B0\u5B9E\u73B0\u4ECE\u8D85\u7C7B\u90A3\u7EE7\u627F\u8FC7\u6765\u7684\u65B9\u6CD5\u3002\u5728\u4E0B\u9762\u8FD9\u5E45\u56FE\u4E2D\uFF0CAnimal \u662F\u7236\u7C7B\uFF0CDog \u662F\u5B50\u7C7B\uFF0CDog \u91CD\u65B0\u5B9E\u73B0\u4E86 <code>move()</code> \u65B9\u6CD5\u7528\u6765\u548C\u7236\u7C7B\u8FDB\u884C\u533A\u5206\uFF0C\u6BD5\u7ADF\u72D7\u72D7\u8DD1\u8D77\u6765\u8FD8\u662F\u6BD4\u8F83\u6709\u7279\u8272\u7684\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/basic-extra-meal/Overriding-1.png" alt=""></p><p>\u91CD\u5199\u7684\u65B9\u6CD5\u548C\u88AB\u91CD\u5199\u7684\u65B9\u6CD5\uFF0C\u4E0D\u4EC5\u65B9\u6CD5\u540D\u76F8\u540C\uFF0C\u53C2\u6570\u4E5F\u76F8\u540C\uFF0C\u53EA\u4E0D\u8FC7\uFF0C\u65B9\u6CD5\u4F53\u6709\u6240\u4E0D\u540C\u3002</p><h3 id="_02\u3001\u54EA\u4E9B\u65B9\u6CD5\u53EF\u4EE5\u88AB\u91CD\u5199" tabindex="-1"><a class="header-anchor" href="#_02\u3001\u54EA\u4E9B\u65B9\u6CD5\u53EF\u4EE5\u88AB\u91CD\u5199" aria-hidden="true">#</a> 02\u3001\u54EA\u4E9B\u65B9\u6CD5\u53EF\u4EE5\u88AB\u91CD\u5199\uFF1F</h3><p><strong>\u89C4\u5219\u4E00\uFF1A\u53EA\u80FD\u91CD\u5199\u7EE7\u627F\u8FC7\u6765\u7684\u65B9\u6CD5</strong>\u3002</p><p>\u56E0\u4E3A\u91CD\u5199\u662F\u5728\u5B50\u7C7B\u91CD\u65B0\u5B9E\u73B0\u4ECE\u7236\u7C7B\u7EE7\u627F\u8FC7\u6765\u7684\u65B9\u6CD5\u65F6\u53D1\u751F\u7684\uFF0C\u6240\u4EE5\u53EA\u80FD\u91CD\u5199\u7EE7\u627F\u8FC7\u6765\u7684\u65B9\u6CD5\uFF0C\u8FD9\u5F88\u597D\u7406\u89E3\u3002\u8FD9\u5C31\u610F\u5473\u7740\uFF0C\u53EA\u80FD\u91CD\u5199\u90A3\u4E9B\u88AB public\u3001protected \u6216\u8005 default \u4FEE\u9970\u7684\u65B9\u6CD5\uFF0Cprivate \u4FEE\u9970\u7684\u65B9\u6CD5\u65E0\u6CD5\u88AB\u91CD\u5199\u3002</p><p>Animal \u7C7B\u6709 <code>move()</code>\u3001<code>eat()</code> \u548C <code>sleep()</code> \u4E09\u4E2A\u65B9\u6CD5\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">Animal</span> <span class="token punctuation">{</span>
+import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e}from"./app.615e41d8.js";const p={},t=e(`<h1 id="java\u91CD\u5199-overriding-\u65F6\u5E94\u5F53\u9075\u5B88\u768411\u6761\u89C4\u5219" tabindex="-1"><a class="header-anchor" href="#java\u91CD\u5199-overriding-\u65F6\u5E94\u5F53\u9075\u5B88\u768411\u6761\u89C4\u5219" aria-hidden="true">#</a> Java\u91CD\u5199\uFF08Overriding\uFF09\u65F6\u5E94\u5F53\u9075\u5B88\u768411\u6761\u89C4\u5219</h1><p>\u91CD\u5199\uFF08Overriding\uFF09\u7B97\u662F Java \u4E2D\u4E00\u4E2A\u975E\u5E38\u91CD\u8981\u7684\u6982\u5FF5\uFF0C\u7406\u89E3\u91CD\u5199\u5230\u5E95\u662F\u4EC0\u4E48\u5BF9\u6BCF\u4E2A Java \u7A0B\u5E8F\u5458\u6765\u8BF4\u90FD\u81F3\u5173\u91CD\u8981\uFF0C\u8FD9\u7BC7\u6587\u7AE0\u5C31\u6765\u7ED9\u5927\u5BB6\u8BF4\u8BF4\u91CD\u5199\u8FC7\u7A0B\u4E2D\u5E94\u5F53\u9075\u5B88\u7684 12 \u6761\u89C4\u5219\u3002</p><h3 id="_01\u3001\u4EC0\u4E48\u662F\u91CD\u5199" tabindex="-1"><a class="header-anchor" href="#_01\u3001\u4EC0\u4E48\u662F\u91CD\u5199" aria-hidden="true">#</a> 01\u3001\u4EC0\u4E48\u662F\u91CD\u5199\uFF1F</h3><p>\u91CD\u5199\u5E26\u6765\u4E86\u4E00\u79CD\u975E\u5E38\u91CD\u8981\u7684\u80FD\u529B\uFF0C\u53EF\u4EE5\u8BA9\u5B50\u7C7B\u91CD\u65B0\u5B9E\u73B0\u4ECE\u8D85\u7C7B\u90A3\u7EE7\u627F\u8FC7\u6765\u7684\u65B9\u6CD5\u3002\u5728\u4E0B\u9762\u8FD9\u5E45\u56FE\u4E2D\uFF0CAnimal \u662F\u7236\u7C7B\uFF0CDog \u662F\u5B50\u7C7B\uFF0CDog \u91CD\u65B0\u5B9E\u73B0\u4E86 <code>move()</code> \u65B9\u6CD5\u7528\u6765\u548C\u7236\u7C7B\u8FDB\u884C\u533A\u5206\uFF0C\u6BD5\u7ADF\u72D7\u72D7\u8DD1\u8D77\u6765\u8FD8\u662F\u6BD4\u8F83\u6709\u7279\u8272\u7684\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/basic-extra-meal/Overriding-1.png" alt=""></p><p>\u91CD\u5199\u7684\u65B9\u6CD5\u548C\u88AB\u91CD\u5199\u7684\u65B9\u6CD5\uFF0C\u4E0D\u4EC5\u65B9\u6CD5\u540D\u76F8\u540C\uFF0C\u53C2\u6570\u4E5F\u76F8\u540C\uFF0C\u53EA\u4E0D\u8FC7\uFF0C\u65B9\u6CD5\u4F53\u6709\u6240\u4E0D\u540C\u3002</p><h3 id="_02\u3001\u54EA\u4E9B\u65B9\u6CD5\u53EF\u4EE5\u88AB\u91CD\u5199" tabindex="-1"><a class="header-anchor" href="#_02\u3001\u54EA\u4E9B\u65B9\u6CD5\u53EF\u4EE5\u88AB\u91CD\u5199" aria-hidden="true">#</a> 02\u3001\u54EA\u4E9B\u65B9\u6CD5\u53EF\u4EE5\u88AB\u91CD\u5199\uFF1F</h3><p><strong>\u89C4\u5219\u4E00\uFF1A\u53EA\u80FD\u91CD\u5199\u7EE7\u627F\u8FC7\u6765\u7684\u65B9\u6CD5</strong>\u3002</p><p>\u56E0\u4E3A\u91CD\u5199\u662F\u5728\u5B50\u7C7B\u91CD\u65B0\u5B9E\u73B0\u4ECE\u7236\u7C7B\u7EE7\u627F\u8FC7\u6765\u7684\u65B9\u6CD5\u65F6\u53D1\u751F\u7684\uFF0C\u6240\u4EE5\u53EA\u80FD\u91CD\u5199\u7EE7\u627F\u8FC7\u6765\u7684\u65B9\u6CD5\uFF0C\u8FD9\u5F88\u597D\u7406\u89E3\u3002\u8FD9\u5C31\u610F\u5473\u7740\uFF0C\u53EA\u80FD\u91CD\u5199\u90A3\u4E9B\u88AB public\u3001protected \u6216\u8005 default \u4FEE\u9970\u7684\u65B9\u6CD5\uFF0Cprivate \u4FEE\u9970\u7684\u65B9\u6CD5\u65E0\u6CD5\u88AB\u91CD\u5199\u3002</p><p>Animal \u7C7B\u6709 <code>move()</code>\u3001<code>eat()</code> \u548C <code>sleep()</code> \u4E09\u4E2A\u65B9\u6CD5\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">Animal</span> <span class="token punctuation">{</span>
     <span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">move</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span> <span class="token punctuation">}</span>
 
     <span class="token keyword">protected</span> <span class="token keyword">void</span> <span class="token function">eat</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span> <span class="token punctuation">}</span>
diff --git a/dist/assets/ReentrantReadWriteLock.html.b8dcb20a.js b/dist/assets/ReentrantReadWriteLock.html.140f1c3e.js
similarity index 99%
rename from dist/assets/ReentrantReadWriteLock.html.b8dcb20a.js
rename to dist/assets/ReentrantReadWriteLock.html.140f1c3e.js
index a237aad3..31f93cc0 100644
--- a/dist/assets/ReentrantReadWriteLock.html.b8dcb20a.js
+++ b/dist/assets/ReentrantReadWriteLock.html.140f1c3e.js
@@ -1,4 +1,4 @@
-import{_ as e}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o,c,a as n,b as a,e as l,d as t}from"./app.a0271b9c.js";const i={},u=l(`<h1 id="\u6DF1\u5165\u7406\u89E3java\u5E76\u53D1\u8BFB\u5199\u9501reentrantreadwritelock" tabindex="-1"><a class="header-anchor" href="#\u6DF1\u5165\u7406\u89E3java\u5E76\u53D1\u8BFB\u5199\u9501reentrantreadwritelock" aria-hidden="true">#</a> \u6DF1\u5165\u7406\u89E3Java\u5E76\u53D1\u8BFB\u5199\u9501ReentrantReadWriteLock</h1><p>\u5728\u5E76\u53D1\u573A\u666F\u4E2D\u7528\u4E8E\u89E3\u51B3\u7EBF\u7A0B\u5B89\u5168\u7684\u95EE\u9898\uFF0C\u6211\u4EEC\u51E0\u4E4E\u4F1A\u9AD8\u9891\u7387\u7684\u4F7F\u7528\u5230\u72EC\u5360\u5F0F\u9501\uFF0C\u901A\u5E38\u4F7F\u7528java\u63D0\u4F9B\u7684\u5173\u952E\u5B57synchronized\u6216\u8005concurrents\u5305\u4E2D\u5B9E\u73B0\u4E86Lock\u63A5\u53E3\u7684ReentrantLock\u3002\u5B83\u4EEC\u90FD\u662F\u72EC\u5360\u5F0F\u83B7\u53D6\u9501\uFF0C\u4E5F\u5C31\u662F\u5728\u540C\u4E00\u65F6\u523B\u53EA\u6709\u4E00\u4E2A\u7EBF\u7A0B\u80FD\u591F\u83B7\u53D6\u9501\u3002</p><p>\u800C\u5728\u4E00\u4E9B\u4E1A\u52A1\u573A\u666F\u4E2D\uFF0C\u5927\u90E8\u5206\u53EA\u662F\u8BFB\u6570\u636E\uFF0C\u5199\u6570\u636E\u5F88\u5C11\uFF0C\u5982\u679C\u4EC5\u4EC5\u662F\u8BFB\u6570\u636E\u7684\u8BDD\u5E76\u4E0D\u4F1A\u5F71\u54CD\u6570\u636E\u6B63\u786E\u6027\uFF08\u51FA\u73B0\u810F\u8BFB\uFF09\uFF0C\u800C\u5982\u679C\u5728\u8FD9\u79CD\u4E1A\u52A1\u573A\u666F\u4E0B\uFF0C\u4F9D\u7136\u4F7F\u7528\u72EC\u5360\u9501\u7684\u8BDD\uFF0C\u5F88\u663E\u7136\u8FD9\u5C06\u662F\u51FA\u73B0\u6027\u80FD\u74F6\u9888\u7684\u5730\u65B9\u3002\u9488\u5BF9\u8FD9\u79CD\u8BFB\u591A\u5199\u5C11\u7684\u60C5\u51B5\uFF0Cjava\u8FD8\u63D0\u4F9B\u4E86\u53E6\u5916\u4E00\u4E2A\u5B9E\u73B0Lock\u63A5\u53E3\u7684ReentrantReadWriteLock(\u8BFB\u5199\u9501)\u3002</p><p><strong>\u8BFB\u5199\u9501\u5141\u8BB8\u540C\u4E00\u65F6\u523B\u88AB\u591A\u4E2A\u8BFB\u7EBF\u7A0B\u8BBF\u95EE\uFF0C\u4F46\u662F\u5728\u5199\u7EBF\u7A0B\u8BBF\u95EE\u65F6\uFF0C\u6240\u6709\u7684\u8BFB\u7EBF\u7A0B\u548C\u5176\u4ED6\u7684\u5199\u7EBF\u7A0B\u90FD\u4F1A\u88AB\u963B\u585E</strong>\u3002\u5728\u5206\u6790WirteLock\u548CReadLock\u7684\u4E92\u65A5\u6027\u65F6\u53EF\u4EE5\u6309\u7167WriteLock\u4E0EWriteLock\u4E4B\u95F4\uFF0CWriteLock\u4E0EReadLock\u4E4B\u95F4\u4EE5\u53CAReadLock\u4E0EReadLock\u4E4B\u95F4\u8FDB\u884C\u5206\u6790\u3002</p><p>\u66F4\u591A\u5173\u4E8E\u8BFB\u5199\u9501\u7279\u6027\u4ECB\u7ECD\u5927\u5BB6\u53EF\u4EE5\u770B\u6E90\u7801\u4E0A\u7684\u4ECB\u7ECD\uFF08\u9605\u8BFB\u6E90\u7801\u65F6\u6700\u597D\u7684\u4E00\u79CD\u5B66\u4E60\u65B9\u5F0F\uFF0C\u6211\u4E5F\u6B63\u5728\u5B66\u4E60\u4E2D\uFF0C\u4E0E\u5927\u5BB6\u5171\u52C9\uFF09\uFF0C\u8FD9\u91CC\u505A\u4E00\u4E2A\u5F52\u7EB3\u603B\u7ED3\uFF1A</p><ol><li><strong>\u516C\u5E73\u6027\u9009\u62E9</strong>\uFF1A\u652F\u6301\u975E\u516C\u5E73\u6027\uFF08\u9ED8\u8BA4\uFF09\u548C\u516C\u5E73\u7684\u9501\u83B7\u53D6\u65B9\u5F0F\uFF0C\u541E\u5410\u91CF\u8FD8\u662F\u975E\u516C\u5E73\u4F18\u4E8E\u516C\u5E73\uFF1B</li><li><strong>\u91CD\u5165\u6027</strong>\uFF1A\u652F\u6301\u91CD\u5165\uFF0C\u8BFB\u9501\u83B7\u53D6\u540E\u80FD\u518D\u6B21\u83B7\u53D6\uFF0C\u5199\u9501\u83B7\u53D6\u4E4B\u540E\u80FD\u591F\u518D\u6B21\u83B7\u53D6\u5199\u9501\uFF0C\u540C\u65F6\u4E5F\u80FD\u591F\u83B7\u53D6\u8BFB\u9501\uFF1B</li><li><strong>\u9501\u964D\u7EA7</strong>\uFF1A\u9075\u5FAA\u83B7\u53D6\u5199\u9501\uFF0C\u83B7\u53D6\u8BFB\u9501\u518D\u91CA\u653E\u5199\u9501\u7684\u6B21\u5E8F\uFF0C\u5199\u9501\u80FD\u591F\u964D\u7EA7\u6210\u4E3A\u8BFB\u9501</li></ol><p>\u8981\u60F3\u80FD\u591F\u5F7B\u5E95\u7684\u7406\u89E3\u8BFB\u5199\u9501\u5FC5\u987B\u80FD\u591F\u7406\u89E3\u8FD9\u6837\u51E0\u4E2A\u95EE\u9898\uFF1A</p><ul><li><ol><li>\u8BFB\u5199\u9501\u662F\u600E\u6837\u5B9E\u73B0\u5206\u522B\u8BB0\u5F55\u8BFB\u5199\u72B6\u6001\u7684\uFF1F</li></ol></li><li><ol start="2"><li>\u5199\u9501\u662F\u600E\u6837\u83B7\u53D6\u548C\u91CA\u653E\u7684\uFF1F</li></ol></li><li>3.\u8BFB\u9501\u662F\u600E\u6837\u83B7\u53D6\u548C\u91CA\u653E\u7684\uFF1F</li></ul><p>\u6211\u4EEC\u5E26\u7740\u8FD9\u6837\u7684\u4E09\u4E2A\u95EE\u9898\uFF0C\u518D\u53BB\u4E86\u89E3\u4E0B\u8BFB\u5199\u9501\u3002</p><h2 id="\u5199\u9501\u8BE6\u89E3" tabindex="-1"><a class="header-anchor" href="#\u5199\u9501\u8BE6\u89E3" aria-hidden="true">#</a> \u5199\u9501\u8BE6\u89E3</h2><h3 id="\u5199\u9501\u7684\u83B7\u53D6" tabindex="-1"><a class="header-anchor" href="#\u5199\u9501\u7684\u83B7\u53D6" aria-hidden="true">#</a> \u5199\u9501\u7684\u83B7\u53D6</h3><p>\u540C\u6B65\u7EC4\u4EF6\u7684\u5B9E\u73B0\u805A\u5408\u4E86\u540C\u6B65\u5668\uFF08AQS\uFF09\uFF0C\u5E76\u901A\u8FC7\u91CD\u5199\u91CD\u5199\u540C\u6B65\u5668\uFF08AQS\uFF09\u4E2D\u7684\u65B9\u6CD5\u5B9E\u73B0\u540C\u6B65\u7EC4\u4EF6\u7684\u540C\u6B65\u8BED\u4E49\u3002\u56E0\u6B64\uFF0C\u5199\u9501\u7684\u5B9E\u73B0\u4F9D\u7136\u4E5F\u662F\u91C7\u7528\u8FD9\u79CD\u65B9\u5F0F\u3002\u5728\u540C\u4E00\u65F6\u523B\u5199\u9501\u662F\u4E0D\u80FD\u88AB\u591A\u4E2A\u7EBF\u7A0B\u6240\u83B7\u53D6\uFF0C\u5F88\u663E\u7136\u5199\u9501\u662F\u72EC\u5360\u5F0F\u9501\uFF0C\u800C\u5B9E\u73B0\u5199\u9501\u7684\u540C\u6B65\u8BED\u4E49\u662F\u901A\u8FC7\u91CD\u5199AQS\u4E2D\u7684tryAcquire\u65B9\u6CD5\u5B9E\u73B0\u7684\u3002\u6E90\u7801\u4E3A:</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">protected</span> <span class="token keyword">final</span> <span class="token keyword">boolean</span> <span class="token function">tryAcquire</span><span class="token punctuation">(</span><span class="token keyword">int</span> acquires<span class="token punctuation">)</span> <span class="token punctuation">{</span>
+import{_ as e}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o,c,a as n,b as a,e as l,d as t}from"./app.615e41d8.js";const i={},u=l(`<h1 id="\u6DF1\u5165\u7406\u89E3java\u5E76\u53D1\u8BFB\u5199\u9501reentrantreadwritelock" tabindex="-1"><a class="header-anchor" href="#\u6DF1\u5165\u7406\u89E3java\u5E76\u53D1\u8BFB\u5199\u9501reentrantreadwritelock" aria-hidden="true">#</a> \u6DF1\u5165\u7406\u89E3Java\u5E76\u53D1\u8BFB\u5199\u9501ReentrantReadWriteLock</h1><p>\u5728\u5E76\u53D1\u573A\u666F\u4E2D\u7528\u4E8E\u89E3\u51B3\u7EBF\u7A0B\u5B89\u5168\u7684\u95EE\u9898\uFF0C\u6211\u4EEC\u51E0\u4E4E\u4F1A\u9AD8\u9891\u7387\u7684\u4F7F\u7528\u5230\u72EC\u5360\u5F0F\u9501\uFF0C\u901A\u5E38\u4F7F\u7528java\u63D0\u4F9B\u7684\u5173\u952E\u5B57synchronized\u6216\u8005concurrents\u5305\u4E2D\u5B9E\u73B0\u4E86Lock\u63A5\u53E3\u7684ReentrantLock\u3002\u5B83\u4EEC\u90FD\u662F\u72EC\u5360\u5F0F\u83B7\u53D6\u9501\uFF0C\u4E5F\u5C31\u662F\u5728\u540C\u4E00\u65F6\u523B\u53EA\u6709\u4E00\u4E2A\u7EBF\u7A0B\u80FD\u591F\u83B7\u53D6\u9501\u3002</p><p>\u800C\u5728\u4E00\u4E9B\u4E1A\u52A1\u573A\u666F\u4E2D\uFF0C\u5927\u90E8\u5206\u53EA\u662F\u8BFB\u6570\u636E\uFF0C\u5199\u6570\u636E\u5F88\u5C11\uFF0C\u5982\u679C\u4EC5\u4EC5\u662F\u8BFB\u6570\u636E\u7684\u8BDD\u5E76\u4E0D\u4F1A\u5F71\u54CD\u6570\u636E\u6B63\u786E\u6027\uFF08\u51FA\u73B0\u810F\u8BFB\uFF09\uFF0C\u800C\u5982\u679C\u5728\u8FD9\u79CD\u4E1A\u52A1\u573A\u666F\u4E0B\uFF0C\u4F9D\u7136\u4F7F\u7528\u72EC\u5360\u9501\u7684\u8BDD\uFF0C\u5F88\u663E\u7136\u8FD9\u5C06\u662F\u51FA\u73B0\u6027\u80FD\u74F6\u9888\u7684\u5730\u65B9\u3002\u9488\u5BF9\u8FD9\u79CD\u8BFB\u591A\u5199\u5C11\u7684\u60C5\u51B5\uFF0Cjava\u8FD8\u63D0\u4F9B\u4E86\u53E6\u5916\u4E00\u4E2A\u5B9E\u73B0Lock\u63A5\u53E3\u7684ReentrantReadWriteLock(\u8BFB\u5199\u9501)\u3002</p><p><strong>\u8BFB\u5199\u9501\u5141\u8BB8\u540C\u4E00\u65F6\u523B\u88AB\u591A\u4E2A\u8BFB\u7EBF\u7A0B\u8BBF\u95EE\uFF0C\u4F46\u662F\u5728\u5199\u7EBF\u7A0B\u8BBF\u95EE\u65F6\uFF0C\u6240\u6709\u7684\u8BFB\u7EBF\u7A0B\u548C\u5176\u4ED6\u7684\u5199\u7EBF\u7A0B\u90FD\u4F1A\u88AB\u963B\u585E</strong>\u3002\u5728\u5206\u6790WirteLock\u548CReadLock\u7684\u4E92\u65A5\u6027\u65F6\u53EF\u4EE5\u6309\u7167WriteLock\u4E0EWriteLock\u4E4B\u95F4\uFF0CWriteLock\u4E0EReadLock\u4E4B\u95F4\u4EE5\u53CAReadLock\u4E0EReadLock\u4E4B\u95F4\u8FDB\u884C\u5206\u6790\u3002</p><p>\u66F4\u591A\u5173\u4E8E\u8BFB\u5199\u9501\u7279\u6027\u4ECB\u7ECD\u5927\u5BB6\u53EF\u4EE5\u770B\u6E90\u7801\u4E0A\u7684\u4ECB\u7ECD\uFF08\u9605\u8BFB\u6E90\u7801\u65F6\u6700\u597D\u7684\u4E00\u79CD\u5B66\u4E60\u65B9\u5F0F\uFF0C\u6211\u4E5F\u6B63\u5728\u5B66\u4E60\u4E2D\uFF0C\u4E0E\u5927\u5BB6\u5171\u52C9\uFF09\uFF0C\u8FD9\u91CC\u505A\u4E00\u4E2A\u5F52\u7EB3\u603B\u7ED3\uFF1A</p><ol><li><strong>\u516C\u5E73\u6027\u9009\u62E9</strong>\uFF1A\u652F\u6301\u975E\u516C\u5E73\u6027\uFF08\u9ED8\u8BA4\uFF09\u548C\u516C\u5E73\u7684\u9501\u83B7\u53D6\u65B9\u5F0F\uFF0C\u541E\u5410\u91CF\u8FD8\u662F\u975E\u516C\u5E73\u4F18\u4E8E\u516C\u5E73\uFF1B</li><li><strong>\u91CD\u5165\u6027</strong>\uFF1A\u652F\u6301\u91CD\u5165\uFF0C\u8BFB\u9501\u83B7\u53D6\u540E\u80FD\u518D\u6B21\u83B7\u53D6\uFF0C\u5199\u9501\u83B7\u53D6\u4E4B\u540E\u80FD\u591F\u518D\u6B21\u83B7\u53D6\u5199\u9501\uFF0C\u540C\u65F6\u4E5F\u80FD\u591F\u83B7\u53D6\u8BFB\u9501\uFF1B</li><li><strong>\u9501\u964D\u7EA7</strong>\uFF1A\u9075\u5FAA\u83B7\u53D6\u5199\u9501\uFF0C\u83B7\u53D6\u8BFB\u9501\u518D\u91CA\u653E\u5199\u9501\u7684\u6B21\u5E8F\uFF0C\u5199\u9501\u80FD\u591F\u964D\u7EA7\u6210\u4E3A\u8BFB\u9501</li></ol><p>\u8981\u60F3\u80FD\u591F\u5F7B\u5E95\u7684\u7406\u89E3\u8BFB\u5199\u9501\u5FC5\u987B\u80FD\u591F\u7406\u89E3\u8FD9\u6837\u51E0\u4E2A\u95EE\u9898\uFF1A</p><ul><li><ol><li>\u8BFB\u5199\u9501\u662F\u600E\u6837\u5B9E\u73B0\u5206\u522B\u8BB0\u5F55\u8BFB\u5199\u72B6\u6001\u7684\uFF1F</li></ol></li><li><ol start="2"><li>\u5199\u9501\u662F\u600E\u6837\u83B7\u53D6\u548C\u91CA\u653E\u7684\uFF1F</li></ol></li><li>3.\u8BFB\u9501\u662F\u600E\u6837\u83B7\u53D6\u548C\u91CA\u653E\u7684\uFF1F</li></ul><p>\u6211\u4EEC\u5E26\u7740\u8FD9\u6837\u7684\u4E09\u4E2A\u95EE\u9898\uFF0C\u518D\u53BB\u4E86\u89E3\u4E0B\u8BFB\u5199\u9501\u3002</p><h2 id="\u5199\u9501\u8BE6\u89E3" tabindex="-1"><a class="header-anchor" href="#\u5199\u9501\u8BE6\u89E3" aria-hidden="true">#</a> \u5199\u9501\u8BE6\u89E3</h2><h3 id="\u5199\u9501\u7684\u83B7\u53D6" tabindex="-1"><a class="header-anchor" href="#\u5199\u9501\u7684\u83B7\u53D6" aria-hidden="true">#</a> \u5199\u9501\u7684\u83B7\u53D6</h3><p>\u540C\u6B65\u7EC4\u4EF6\u7684\u5B9E\u73B0\u805A\u5408\u4E86\u540C\u6B65\u5668\uFF08AQS\uFF09\uFF0C\u5E76\u901A\u8FC7\u91CD\u5199\u91CD\u5199\u540C\u6B65\u5668\uFF08AQS\uFF09\u4E2D\u7684\u65B9\u6CD5\u5B9E\u73B0\u540C\u6B65\u7EC4\u4EF6\u7684\u540C\u6B65\u8BED\u4E49\u3002\u56E0\u6B64\uFF0C\u5199\u9501\u7684\u5B9E\u73B0\u4F9D\u7136\u4E5F\u662F\u91C7\u7528\u8FD9\u79CD\u65B9\u5F0F\u3002\u5728\u540C\u4E00\u65F6\u523B\u5199\u9501\u662F\u4E0D\u80FD\u88AB\u591A\u4E2A\u7EBF\u7A0B\u6240\u83B7\u53D6\uFF0C\u5F88\u663E\u7136\u5199\u9501\u662F\u72EC\u5360\u5F0F\u9501\uFF0C\u800C\u5B9E\u73B0\u5199\u9501\u7684\u540C\u6B65\u8BED\u4E49\u662F\u901A\u8FC7\u91CD\u5199AQS\u4E2D\u7684tryAcquire\u65B9\u6CD5\u5B9E\u73B0\u7684\u3002\u6E90\u7801\u4E3A:</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">protected</span> <span class="token keyword">final</span> <span class="token keyword">boolean</span> <span class="token function">tryAcquire</span><span class="token punctuation">(</span><span class="token keyword">int</span> acquires<span class="token punctuation">)</span> <span class="token punctuation">{</span>
     <span class="token comment">/*
      * Walkthrough:
      * 1. If read count nonzero or write count nonzero
diff --git a/dist/assets/ScheduledThreadPoolExecutor.html.e216d19d.js b/dist/assets/ScheduledThreadPoolExecutor.html.73744e7a.js
similarity index 99%
rename from dist/assets/ScheduledThreadPoolExecutor.html.e216d19d.js
rename to dist/assets/ScheduledThreadPoolExecutor.html.73744e7a.js
index 4ecbbb41..6b701181 100644
--- a/dist/assets/ScheduledThreadPoolExecutor.html.e216d19d.js
+++ b/dist/assets/ScheduledThreadPoolExecutor.html.73744e7a.js
@@ -1,4 +1,4 @@
-import{_ as p}from"./plugin-vue_export-helper.21dcd24c.js";import{r as t,o,c,a as n,b as a,e as l,d as e}from"./app.a0271b9c.js";const u={},i=l(`<p>\u81EAJDK 1.5 \u5F00\u59CB\uFF0CJDK\u63D0\u4F9B\u4E86<code>ScheduledThreadPoolExecutor</code>\u7C7B\u7528\u4E8E\u8BA1\u5212\u4EFB\u52A1\uFF08\u53C8\u79F0\u5B9A\u65F6\u4EFB\u52A1\uFF09\uFF0C\u8FD9\u4E2A\u7C7B\u6709\u4E24\u4E2A\u7528\u9014\uFF1A</p><ul><li>\u5728\u7ED9\u5B9A\u7684\u5EF6\u8FDF\u4E4B\u540E\u8FD0\u884C\u4EFB\u52A1</li><li>\u5468\u671F\u6027\u91CD\u590D\u6267\u884C\u4EFB\u52A1</li></ul><p>\u5728\u8FD9\u4E4B\u524D\uFF0C\u662F\u4F7F\u7528<code>Timer</code>\u7C7B\u6765\u5B8C\u6210\u5B9A\u65F6\u4EFB\u52A1\u7684\uFF0C\u4F46\u662F<code>Timer</code>\u6709\u7F3A\u9677\uFF1A</p><ul><li>Timer\u662F<strong>\u5355\u7EBF\u7A0B</strong>\u6A21\u5F0F\uFF1B</li><li>\u5982\u679C\u5728\u6267\u884C\u4EFB\u52A1\u671F\u95F4\u67D0\u4E2ATimerTask\u8017\u65F6\u8F83\u4E45\uFF0C\u90A3\u4E48\u5C31\u4F1A\u5F71\u54CD\u5176\u5B83\u4EFB\u52A1\u7684\u8C03\u5EA6\uFF1B</li><li>Timer\u7684\u4EFB\u52A1\u8C03\u5EA6\u662F\u57FA\u4E8E\u7EDD\u5BF9\u65F6\u95F4\u7684\uFF0C\u5BF9<strong>\u7CFB\u7EDF\u65F6\u95F4</strong>\u654F\u611F\uFF1B</li><li>Timer\u4E0D\u4F1A\u6355\u83B7\u6267\u884CTimerTask\u65F6\u6240\u629B\u51FA\u7684<strong>\u5F02\u5E38</strong>\uFF0C\u7531\u4E8ETimer\u662F\u5355\u7EBF\u7A0B\uFF0C\u6240\u4EE5\u4E00\u65E6\u51FA\u73B0\u5F02\u5E38\uFF0C\u5219\u7EBF\u7A0B\u5C31\u4F1A\u7EC8\u6B62\uFF0C\u5176\u4ED6\u4EFB\u52A1\u4E5F\u5F97\u4E0D\u5230\u6267\u884C\u3002</li></ul><p>\u6240\u4EE5JDK 1.5\u4E4B\u540E\uFF0C\u5927\u5BB6\u5C31\u6452\u5F03<code>Timer</code>,\u4F7F\u7528<code>ScheduledThreadPoolExecutor</code>\u5427\u3002</p><h2 id="\u4F7F\u7528\u6848\u4F8B" tabindex="-1"><a class="header-anchor" href="#\u4F7F\u7528\u6848\u4F8B" aria-hidden="true">#</a> \u4F7F\u7528\u6848\u4F8B</h2><p>\u5047\u8BBE\u6211\u6709\u4E00\u4E2A\u9700\u6C42\uFF0C\u6307\u5B9A\u65F6\u95F4\u7ED9\u5927\u5BB6\u53D1\u9001\u6D88\u606F\u3002\u90A3\u4E48\u6211\u4EEC\u4F1A\u5C06\u6D88\u606F\uFF08\u5305\u542B\u53D1\u9001\u65F6\u95F4\uFF09\u5B58\u50A8\u5728\u6570\u636E\u5E93\u4E2D\uFF0C\u7136\u540E\u60F3\u7528\u4E00\u4E2A\u5B9A\u65F6\u4EFB\u52A1\uFF0C\u6BCF\u96941\u79D2\u68C0\u67E5\u6570\u636E\u5E93\u5728\u5F53\u524D\u65F6\u95F4\u6709\u6CA1\u6709\u9700\u8981\u53D1\u9001\u7684\u6D88\u606F\uFF0C\u90A3\u8FD9\u4E2A\u8BA1\u5212\u4EFB\u52A1\u600E\u4E48\u5199\uFF1F\u4E0B\u9762\u662F\u4E00\u4E2ADemo:</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">ThreadPool</span> <span class="token punctuation">{</span>
+import{_ as p}from"./plugin-vue_export-helper.21dcd24c.js";import{r as t,o,c,a as n,b as a,e as l,d as e}from"./app.615e41d8.js";const u={},i=l(`<p>\u81EAJDK 1.5 \u5F00\u59CB\uFF0CJDK\u63D0\u4F9B\u4E86<code>ScheduledThreadPoolExecutor</code>\u7C7B\u7528\u4E8E\u8BA1\u5212\u4EFB\u52A1\uFF08\u53C8\u79F0\u5B9A\u65F6\u4EFB\u52A1\uFF09\uFF0C\u8FD9\u4E2A\u7C7B\u6709\u4E24\u4E2A\u7528\u9014\uFF1A</p><ul><li>\u5728\u7ED9\u5B9A\u7684\u5EF6\u8FDF\u4E4B\u540E\u8FD0\u884C\u4EFB\u52A1</li><li>\u5468\u671F\u6027\u91CD\u590D\u6267\u884C\u4EFB\u52A1</li></ul><p>\u5728\u8FD9\u4E4B\u524D\uFF0C\u662F\u4F7F\u7528<code>Timer</code>\u7C7B\u6765\u5B8C\u6210\u5B9A\u65F6\u4EFB\u52A1\u7684\uFF0C\u4F46\u662F<code>Timer</code>\u6709\u7F3A\u9677\uFF1A</p><ul><li>Timer\u662F<strong>\u5355\u7EBF\u7A0B</strong>\u6A21\u5F0F\uFF1B</li><li>\u5982\u679C\u5728\u6267\u884C\u4EFB\u52A1\u671F\u95F4\u67D0\u4E2ATimerTask\u8017\u65F6\u8F83\u4E45\uFF0C\u90A3\u4E48\u5C31\u4F1A\u5F71\u54CD\u5176\u5B83\u4EFB\u52A1\u7684\u8C03\u5EA6\uFF1B</li><li>Timer\u7684\u4EFB\u52A1\u8C03\u5EA6\u662F\u57FA\u4E8E\u7EDD\u5BF9\u65F6\u95F4\u7684\uFF0C\u5BF9<strong>\u7CFB\u7EDF\u65F6\u95F4</strong>\u654F\u611F\uFF1B</li><li>Timer\u4E0D\u4F1A\u6355\u83B7\u6267\u884CTimerTask\u65F6\u6240\u629B\u51FA\u7684<strong>\u5F02\u5E38</strong>\uFF0C\u7531\u4E8ETimer\u662F\u5355\u7EBF\u7A0B\uFF0C\u6240\u4EE5\u4E00\u65E6\u51FA\u73B0\u5F02\u5E38\uFF0C\u5219\u7EBF\u7A0B\u5C31\u4F1A\u7EC8\u6B62\uFF0C\u5176\u4ED6\u4EFB\u52A1\u4E5F\u5F97\u4E0D\u5230\u6267\u884C\u3002</li></ul><p>\u6240\u4EE5JDK 1.5\u4E4B\u540E\uFF0C\u5927\u5BB6\u5C31\u6452\u5F03<code>Timer</code>,\u4F7F\u7528<code>ScheduledThreadPoolExecutor</code>\u5427\u3002</p><h2 id="\u4F7F\u7528\u6848\u4F8B" tabindex="-1"><a class="header-anchor" href="#\u4F7F\u7528\u6848\u4F8B" aria-hidden="true">#</a> \u4F7F\u7528\u6848\u4F8B</h2><p>\u5047\u8BBE\u6211\u6709\u4E00\u4E2A\u9700\u6C42\uFF0C\u6307\u5B9A\u65F6\u95F4\u7ED9\u5927\u5BB6\u53D1\u9001\u6D88\u606F\u3002\u90A3\u4E48\u6211\u4EEC\u4F1A\u5C06\u6D88\u606F\uFF08\u5305\u542B\u53D1\u9001\u65F6\u95F4\uFF09\u5B58\u50A8\u5728\u6570\u636E\u5E93\u4E2D\uFF0C\u7136\u540E\u60F3\u7528\u4E00\u4E2A\u5B9A\u65F6\u4EFB\u52A1\uFF0C\u6BCF\u96941\u79D2\u68C0\u67E5\u6570\u636E\u5E93\u5728\u5F53\u524D\u65F6\u95F4\u6709\u6CA1\u6709\u9700\u8981\u53D1\u9001\u7684\u6D88\u606F\uFF0C\u90A3\u8FD9\u4E2A\u8BA1\u5212\u4EFB\u52A1\u600E\u4E48\u5199\uFF1F\u4E0B\u9762\u662F\u4E00\u4E2ADemo:</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">ThreadPool</span> <span class="token punctuation">{</span>
     
     <span class="token keyword">private</span> <span class="token keyword">static</span> <span class="token keyword">final</span> <span class="token class-name">ScheduledExecutorService</span> executor <span class="token operator">=</span> <span class="token keyword">new</span>
         <span class="token class-name">ScheduledThreadPoolExecutor</span><span class="token punctuation">(</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token class-name">Executors</span><span class="token punctuation">.</span><span class="token function">defaultThreadFactory</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
diff --git a/dist/assets/SkipLink.e761490e.js b/dist/assets/SkipLink.a2c3a90f.js
similarity index 89%
rename from dist/assets/SkipLink.e761490e.js
rename to dist/assets/SkipLink.a2c3a90f.js
index 001ed7e2..78905bf3 100644
--- a/dist/assets/SkipLink.e761490e.js
+++ b/dist/assets/SkipLink.a2c3a90f.js
@@ -1 +1 @@
-import{f as c,j as u,k as p,l,h as o}from"./app.a0271b9c.js";var f=c({name:"SkipLink",props:{content:{type:String,default:"main-content"}},setup(s){const r=u(),t=p();l(()=>r.path,()=>t.value.focus());const a=({target:i})=>{const e=document.querySelector(i.hash);if(e){const n=()=>{e.removeAttribute("tabindex"),e.removeEventListener("blur",n)};e.setAttribute("tabindex","-1"),e.addEventListener("blur",n),e.focus(),window.scrollTo(0,0)}};return()=>[o("span",{ref:t,tabindex:"-1"}),o("a",{href:`#${s.content}`,class:"skip-link sr-only",onClick:a},"Skip to content")]}});export{f as S};
+import{f as c,j as u,k as p,l,h as o}from"./app.615e41d8.js";var f=c({name:"SkipLink",props:{content:{type:String,default:"main-content"}},setup(s){const r=u(),t=p();l(()=>r.path,()=>t.value.focus());const a=({target:i})=>{const e=document.querySelector(i.hash);if(e){const n=()=>{e.removeAttribute("tabindex"),e.removeEventListener("blur",n)};e.setAttribute("tabindex","-1"),e.addEventListener("blur",n),e.focus(),window.scrollTo(0,0)}};return()=>[o("span",{ref:t,tabindex:"-1"}),o("a",{href:`#${s.content}`,class:"skip-link sr-only",onClick:a},"Skip to content")]}});export{f as S};
diff --git a/dist/assets/Slide.a2a8944b.js b/dist/assets/Slide.39e63deb.js
similarity index 94%
rename from dist/assets/Slide.a2a8944b.js
rename to dist/assets/Slide.39e63deb.js
index 3652528d..24369cff 100644
--- a/dist/assets/Slide.a2a8944b.js
+++ b/dist/assets/Slide.39e63deb.js
@@ -1 +1 @@
-import{f as u,v as i,k as o,x as c,h as a,C as v,y as s}from"./app.a0271b9c.js";const r=()=>a(s,{name:"back"},()=>a("path",{d:"M1014.749 449.156v125.688H260.626l345.64 345.64-89.239 89.237L19.307 512l497.72-497.721 89.238 89.238-345.64 345.64h754.124z"})),d=()=>a(s,{name:"home"},()=>a("path",{d:"M780.106 420.978L506.994 147.866 233.882 420.978h.045v455.11H780.06v-455.11h.046zm90.977 90.976V876.09a91.022 91.022 0 01-91.023 91.022H233.927a91.022 91.022 0 01-91.022-91.022V511.954l-67.22 67.175-64.307-64.307 431.309-431.31c35.498-35.498 93.115-35.498 128.614 0l431.309 431.31-64.307 64.307L871.083 512z"}));var h=u({name:"SlidePage",setup(){const l=i(),t=o(!1),e=o(null),n=()=>{t.value=!1};return c(e,n),()=>a("div",{class:"presentation"},[a(v),a("div",{ref:e,class:["menu",{active:t.value}]},[a("button",{class:"menu-button",onClick:()=>{t.value=!t.value}},a("span",{class:"icon"})),a("button",{class:"back-button",onClick:()=>(n(),void window.history.go(-1))},a(r)),a("button",{class:"home-button",onClick:()=>(n(),void l.push("/"))},a(d))])])}});export{h as default};
+import{f as u,v as i,k as o,x as c,h as a,C as v,y as s}from"./app.615e41d8.js";const r=()=>a(s,{name:"back"},()=>a("path",{d:"M1014.749 449.156v125.688H260.626l345.64 345.64-89.239 89.237L19.307 512l497.72-497.721 89.238 89.238-345.64 345.64h754.124z"})),d=()=>a(s,{name:"home"},()=>a("path",{d:"M780.106 420.978L506.994 147.866 233.882 420.978h.045v455.11H780.06v-455.11h.046zm90.977 90.976V876.09a91.022 91.022 0 01-91.023 91.022H233.927a91.022 91.022 0 01-91.022-91.022V511.954l-67.22 67.175-64.307-64.307 431.309-431.31c35.498-35.498 93.115-35.498 128.614 0l431.309 431.31-64.307 64.307L871.083 512z"}));var h=u({name:"SlidePage",setup(){const l=i(),t=o(!1),e=o(null),n=()=>{t.value=!1};return c(e,n),()=>a("div",{class:"presentation"},[a(v),a("div",{ref:e,class:["menu",{active:t.value}]},[a("button",{class:"menu-button",onClick:()=>{t.value=!t.value}},a("span",{class:"icon"})),a("button",{class:"back-button",onClick:()=>(n(),void window.history.go(-1))},a(r)),a("button",{class:"home-button",onClick:()=>(n(),void l.push("/"))},a(d))])])}});export{h as default};
diff --git a/dist/assets/ThreadLocal.html.284cf60c.js b/dist/assets/ThreadLocal.html.2993d4fd.js
similarity index 99%
rename from dist/assets/ThreadLocal.html.284cf60c.js
rename to dist/assets/ThreadLocal.html.2993d4fd.js
index 569015aa..8d66aa63 100644
--- a/dist/assets/ThreadLocal.html.284cf60c.js
+++ b/dist/assets/ThreadLocal.html.2993d4fd.js
@@ -1,4 +1,4 @@
-import{_ as p}from"./plugin-vue_export-helper.21dcd24c.js";import{r as o,o as c,c as l,a as n,b as e,e as t,d as a}from"./app.a0271b9c.js";const i={},u=t(`<h2 id="threadlocal\u7684\u7B80\u4ECB" tabindex="-1"><a class="header-anchor" href="#threadlocal\u7684\u7B80\u4ECB" aria-hidden="true">#</a> ThreadLocal\u7684\u7B80\u4ECB</h2><p>\u5728\u591A\u7EBF\u7A0B\u7F16\u7A0B\u4E2D\u901A\u5E38\u89E3\u51B3\u7EBF\u7A0B\u5B89\u5168\u7684\u95EE\u9898\u6211\u4EEC\u4F1A\u5229\u7528synchronzed\u6216\u8005lock\u63A7\u5236\u7EBF\u7A0B\u5BF9\u4E34\u754C\u533A\u8D44\u6E90\u7684\u540C\u6B65\u987A\u5E8F\u4ECE\u800C\u89E3\u51B3\u7EBF\u7A0B\u5B89\u5168\u7684\u95EE\u9898\uFF0C\u4F46\u662F\u8FD9\u79CD\u52A0\u9501\u7684\u65B9\u5F0F\u4F1A\u8BA9\u672A\u83B7\u53D6\u5230\u9501\u7684\u7EBF\u7A0B\u8FDB\u884C\u963B\u585E\u7B49\u5F85\uFF0C\u5F88\u663E\u7136\u8FD9\u79CD\u65B9\u5F0F\u7684\u65F6\u95F4\u6548\u7387\u5E76\u4E0D\u662F\u5F88\u597D\u3002</p><p><strong>\u7EBF\u7A0B\u5B89\u5168\u95EE\u9898\u7684\u6838\u5FC3\u5728\u4E8E\u591A\u4E2A\u7EBF\u7A0B\u4F1A\u5BF9\u540C\u4E00\u4E2A\u4E34\u754C\u533A\u5171\u4EAB\u8D44\u6E90\u8FDB\u884C\u64CD\u4F5C</strong>\uFF0C\u90A3\u4E48\uFF0C\u5982\u679C\u6BCF\u4E2A\u7EBF\u7A0B\u90FD\u4F7F\u7528\u81EA\u5DF1\u7684\u201C\u5171\u4EAB\u8D44\u6E90\u201D\uFF0C\u5404\u81EA\u4F7F\u7528\u5404\u81EA\u7684\uFF0C\u53C8\u4E92\u76F8\u4E0D\u5F71\u54CD\u5230\u5F7C\u6B64\u5373\u8BA9\u591A\u4E2A\u7EBF\u7A0B\u95F4\u8FBE\u5230\u9694\u79BB\u7684\u72B6\u6001\uFF0C\u8FD9\u6837\u5C31\u4E0D\u4F1A\u51FA\u73B0\u7EBF\u7A0B\u5B89\u5168\u7684\u95EE\u9898\u3002</p><p>\u4E8B\u5B9E\u4E0A\uFF0C\u8FD9\u5C31\u662F\u4E00\u79CD\u201C<strong>\u7A7A\u95F4\u6362\u65F6\u95F4</strong>\u201D\u7684\u65B9\u6848\uFF0C\u6BCF\u4E2A\u7EBF\u7A0B\u90FD\u4F1A\u90FD\u62E5\u6709\u81EA\u5DF1\u7684\u201C\u5171\u4EAB\u8D44\u6E90\u201D\u65E0\u7591\u5185\u5B58\u4F1A\u5927\u5F88\u591A\uFF0C\u4F46\u662F\u7531\u4E8E\u4E0D\u9700\u8981\u540C\u6B65\u4E5F\u5C31\u51CF\u5C11\u4E86\u7EBF\u7A0B\u53EF\u80FD\u5B58\u5728\u7684\u963B\u585E\u7B49\u5F85\u7684\u60C5\u51B5\u4ECE\u800C\u63D0\u9AD8\u7684\u65F6\u95F4\u6548\u7387\u3002</p><p>\u867D\u7136ThreadLocal\u5E76\u4E0D\u5728java.util.concurrent\u5305\u4E2D\u800C\u5728java.lang\u5305\u4E2D\uFF0C\u4F46\u6211\u66F4\u503E\u5411\u4E8E\u628A\u5B83\u5F53\u4F5C\u662F\u4E00\u79CD\u5E76\u53D1\u5BB9\u5668\uFF08\u867D\u7136\u771F\u6B63\u5B58\u653E\u6570\u636E\u7684\u662FThreadLoclMap\uFF09\u8FDB\u884C\u5F52\u7C7B\u3002</p><p>\u4ECE<strong>ThreadLocal\u8FD9\u4E2A\u7C7B\u540D\u53EF\u4EE5\u987E\u540D\u601D\u4E49\u7684\u8FDB\u884C\u7406\u89E3\uFF0C\u8868\u793A\u7EBF\u7A0B\u7684\u201C\u672C\u5730\u53D8\u91CF\u201D\uFF0C\u5373\u6BCF\u4E2A\u7EBF\u7A0B\u90FD\u62E5\u6709\u8BE5\u53D8\u91CF\u526F\u672C\uFF0C\u8FBE\u5230\u4EBA\u624B\u4E00\u4EFD\u7684\u6548\u679C\uFF0C\u5404\u7528\u5404\u7684\u8FD9\u6837\u5C31\u53EF\u4EE5\u907F\u514D\u5171\u4EAB\u8D44\u6E90\u7684\u7ADE\u4E89</strong>\u3002</p><h2 id="threadlocal\u7684\u5B9E\u73B0\u539F\u7406" tabindex="-1"><a class="header-anchor" href="#threadlocal\u7684\u5B9E\u73B0\u539F\u7406" aria-hidden="true">#</a> ThreadLocal\u7684\u5B9E\u73B0\u539F\u7406</h2><p>\u8981\u60F3\u5B66\u4E60\u5230ThreadLocal\u7684\u5B9E\u73B0\u539F\u7406\uFF0C\u5C31\u5FC5\u987B\u4E86\u89E3\u5B83\u7684\u51E0\u4E2A\u6838\u5FC3\u65B9\u6CD5\uFF0C\u5305\u62EC\u600E\u6837\u5B58\u600E\u6837\u53D6\u7B49\u7B49\uFF0C\u4E0B\u9762\u6211\u4EEC\u4E00\u4E2A\u4E2A\u6765\u770B\u3002</p><h3 id="void-set-t-value" tabindex="-1"><a class="header-anchor" href="#void-set-t-value" aria-hidden="true">#</a> <code>void set(T value)</code></h3><p><strong>set\u65B9\u6CD5\u8BBE\u7F6E\u5728\u5F53\u524D\u7EBF\u7A0B\u4E2DthreadLocal\u53D8\u91CF\u7684\u503C</strong>\uFF0C\u8BE5\u65B9\u6CD5\u7684\u6E90\u7801\u4E3A\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">set</span><span class="token punctuation">(</span><span class="token class-name">T</span> value<span class="token punctuation">)</span> <span class="token punctuation">{</span>
+import{_ as p}from"./plugin-vue_export-helper.21dcd24c.js";import{r as o,o as c,c as l,a as n,b as e,e as t,d as a}from"./app.615e41d8.js";const i={},u=t(`<h2 id="threadlocal\u7684\u7B80\u4ECB" tabindex="-1"><a class="header-anchor" href="#threadlocal\u7684\u7B80\u4ECB" aria-hidden="true">#</a> ThreadLocal\u7684\u7B80\u4ECB</h2><p>\u5728\u591A\u7EBF\u7A0B\u7F16\u7A0B\u4E2D\u901A\u5E38\u89E3\u51B3\u7EBF\u7A0B\u5B89\u5168\u7684\u95EE\u9898\u6211\u4EEC\u4F1A\u5229\u7528synchronzed\u6216\u8005lock\u63A7\u5236\u7EBF\u7A0B\u5BF9\u4E34\u754C\u533A\u8D44\u6E90\u7684\u540C\u6B65\u987A\u5E8F\u4ECE\u800C\u89E3\u51B3\u7EBF\u7A0B\u5B89\u5168\u7684\u95EE\u9898\uFF0C\u4F46\u662F\u8FD9\u79CD\u52A0\u9501\u7684\u65B9\u5F0F\u4F1A\u8BA9\u672A\u83B7\u53D6\u5230\u9501\u7684\u7EBF\u7A0B\u8FDB\u884C\u963B\u585E\u7B49\u5F85\uFF0C\u5F88\u663E\u7136\u8FD9\u79CD\u65B9\u5F0F\u7684\u65F6\u95F4\u6548\u7387\u5E76\u4E0D\u662F\u5F88\u597D\u3002</p><p><strong>\u7EBF\u7A0B\u5B89\u5168\u95EE\u9898\u7684\u6838\u5FC3\u5728\u4E8E\u591A\u4E2A\u7EBF\u7A0B\u4F1A\u5BF9\u540C\u4E00\u4E2A\u4E34\u754C\u533A\u5171\u4EAB\u8D44\u6E90\u8FDB\u884C\u64CD\u4F5C</strong>\uFF0C\u90A3\u4E48\uFF0C\u5982\u679C\u6BCF\u4E2A\u7EBF\u7A0B\u90FD\u4F7F\u7528\u81EA\u5DF1\u7684\u201C\u5171\u4EAB\u8D44\u6E90\u201D\uFF0C\u5404\u81EA\u4F7F\u7528\u5404\u81EA\u7684\uFF0C\u53C8\u4E92\u76F8\u4E0D\u5F71\u54CD\u5230\u5F7C\u6B64\u5373\u8BA9\u591A\u4E2A\u7EBF\u7A0B\u95F4\u8FBE\u5230\u9694\u79BB\u7684\u72B6\u6001\uFF0C\u8FD9\u6837\u5C31\u4E0D\u4F1A\u51FA\u73B0\u7EBF\u7A0B\u5B89\u5168\u7684\u95EE\u9898\u3002</p><p>\u4E8B\u5B9E\u4E0A\uFF0C\u8FD9\u5C31\u662F\u4E00\u79CD\u201C<strong>\u7A7A\u95F4\u6362\u65F6\u95F4</strong>\u201D\u7684\u65B9\u6848\uFF0C\u6BCF\u4E2A\u7EBF\u7A0B\u90FD\u4F1A\u90FD\u62E5\u6709\u81EA\u5DF1\u7684\u201C\u5171\u4EAB\u8D44\u6E90\u201D\u65E0\u7591\u5185\u5B58\u4F1A\u5927\u5F88\u591A\uFF0C\u4F46\u662F\u7531\u4E8E\u4E0D\u9700\u8981\u540C\u6B65\u4E5F\u5C31\u51CF\u5C11\u4E86\u7EBF\u7A0B\u53EF\u80FD\u5B58\u5728\u7684\u963B\u585E\u7B49\u5F85\u7684\u60C5\u51B5\u4ECE\u800C\u63D0\u9AD8\u7684\u65F6\u95F4\u6548\u7387\u3002</p><p>\u867D\u7136ThreadLocal\u5E76\u4E0D\u5728java.util.concurrent\u5305\u4E2D\u800C\u5728java.lang\u5305\u4E2D\uFF0C\u4F46\u6211\u66F4\u503E\u5411\u4E8E\u628A\u5B83\u5F53\u4F5C\u662F\u4E00\u79CD\u5E76\u53D1\u5BB9\u5668\uFF08\u867D\u7136\u771F\u6B63\u5B58\u653E\u6570\u636E\u7684\u662FThreadLoclMap\uFF09\u8FDB\u884C\u5F52\u7C7B\u3002</p><p>\u4ECE<strong>ThreadLocal\u8FD9\u4E2A\u7C7B\u540D\u53EF\u4EE5\u987E\u540D\u601D\u4E49\u7684\u8FDB\u884C\u7406\u89E3\uFF0C\u8868\u793A\u7EBF\u7A0B\u7684\u201C\u672C\u5730\u53D8\u91CF\u201D\uFF0C\u5373\u6BCF\u4E2A\u7EBF\u7A0B\u90FD\u62E5\u6709\u8BE5\u53D8\u91CF\u526F\u672C\uFF0C\u8FBE\u5230\u4EBA\u624B\u4E00\u4EFD\u7684\u6548\u679C\uFF0C\u5404\u7528\u5404\u7684\u8FD9\u6837\u5C31\u53EF\u4EE5\u907F\u514D\u5171\u4EAB\u8D44\u6E90\u7684\u7ADE\u4E89</strong>\u3002</p><h2 id="threadlocal\u7684\u5B9E\u73B0\u539F\u7406" tabindex="-1"><a class="header-anchor" href="#threadlocal\u7684\u5B9E\u73B0\u539F\u7406" aria-hidden="true">#</a> ThreadLocal\u7684\u5B9E\u73B0\u539F\u7406</h2><p>\u8981\u60F3\u5B66\u4E60\u5230ThreadLocal\u7684\u5B9E\u73B0\u539F\u7406\uFF0C\u5C31\u5FC5\u987B\u4E86\u89E3\u5B83\u7684\u51E0\u4E2A\u6838\u5FC3\u65B9\u6CD5\uFF0C\u5305\u62EC\u600E\u6837\u5B58\u600E\u6837\u53D6\u7B49\u7B49\uFF0C\u4E0B\u9762\u6211\u4EEC\u4E00\u4E2A\u4E2A\u6765\u770B\u3002</p><h3 id="void-set-t-value" tabindex="-1"><a class="header-anchor" href="#void-set-t-value" aria-hidden="true">#</a> <code>void set(T value)</code></h3><p><strong>set\u65B9\u6CD5\u8BBE\u7F6E\u5728\u5F53\u524D\u7EBF\u7A0B\u4E2DthreadLocal\u53D8\u91CF\u7684\u503C</strong>\uFF0C\u8BE5\u65B9\u6CD5\u7684\u6E90\u7801\u4E3A\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">set</span><span class="token punctuation">(</span><span class="token class-name">T</span> value<span class="token punctuation">)</span> <span class="token punctuation">{</span>
 	  <span class="token comment">//1. \u83B7\u53D6\u5F53\u524D\u7EBF\u7A0B\u5B9E\u4F8B\u5BF9\u8C61</span>
     <span class="token class-name">Thread</span> t <span class="token operator">=</span> <span class="token class-name">Thread</span><span class="token punctuation">.</span><span class="token function">currentThread</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 
diff --git a/dist/assets/ZHIHUjavaxuexidaoshemechengduokeyizhaodiyifengongzuo.html.9b7b6461.js b/dist/assets/ZHIHUjavaxuexidaoshemechengduokeyizhaodiyifengongzuo.html.ef1e0c27.js
similarity index 98%
rename from dist/assets/ZHIHUjavaxuexidaoshemechengduokeyizhaodiyifengongzuo.html.9b7b6461.js
rename to dist/assets/ZHIHUjavaxuexidaoshemechengduokeyizhaodiyifengongzuo.html.ef1e0c27.js
index dc12d35f..6c1eeaf0 100644
--- a/dist/assets/ZHIHUjavaxuexidaoshemechengduokeyizhaodiyifengongzuo.html.9b7b6461.js
+++ b/dist/assets/ZHIHUjavaxuexidaoshemechengduokeyizhaodiyifengongzuo.html.ef1e0c27.js
@@ -1 +1 @@
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diff --git a/dist/assets/abstract.html.60b3966f.js b/dist/assets/abstract.html.e17df797.js
similarity index 99%
rename from dist/assets/abstract.html.60b3966f.js
rename to dist/assets/abstract.html.e17df797.js
index 234cb898..fb21306c 100644
--- a/dist/assets/abstract.html.60b3966f.js
+++ b/dist/assets/abstract.html.e17df797.js
@@ -1,4 +1,4 @@
-import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e}from"./app.a0271b9c.js";const p={},t=e(`<h1 id="java\u62BD\u8C61\u7C7B" tabindex="-1"><a class="header-anchor" href="#java\u62BD\u8C61\u7C7B" aria-hidden="true">#</a> Java\u62BD\u8C61\u7C7B</h1><p>\u201C\u4E8C\u54E5\uFF0C\u4F60\u8FD9\u660E\u663E\u52A0\u5FEB\u4E86\u66F4\u65B0\u7684\u9891\u7387\u5440\uFF01\u201D\u4E09\u59B9\u5BF9\u4E8E\u6211\u6700\u8FD1\u7684\u809D\u52B2\u7531\u8877\u7684\u4F69\u670D\u4E86\u8D77\u6765\u3002</p><p>\u201C\u54C8\u54C8\uFF0C\u662F\u5440\uFF0C\u8FD9\u6B21\u4E0D\u80FD\u518D\u65AD\u66F4\u4E86\uFF0C\u6211\u8981\u518D\u66F4 175 \u7BC7\uFF0C\u603B\u8BA1 200 \u7BC7\uFF0C\u7ED9\u5E7F\u5927\u7684\u5B66\u5F1F\u5B66\u59B9\u4EEC\u4E00\u4E2A\u5B8C\u6574\u7684 Java \u5B66\u4E60\u4F53\u7CFB\u3002\u201D\u6211\u5BF9\u672A\u6765\u5145\u6EE1\u4E86\u4FE1\u5FC3\u3002</p><p>\u201C\u90A3\u5C31\u5F00\u59CB\u5427\u3002\u201D\u4E09\u59B9\u8BF4\u3002</p><hr><p>\u5B9A\u4E49\u62BD\u8C61\u7C7B\u7684\u65F6\u5019\u9700\u8981\u7528\u5230\u5173\u952E\u5B57 <code>abstract</code>\uFF0C\u653E\u5728 <code>class</code> \u5173\u952E\u5B57\u524D\uFF0C\u5C31\u50CF\u4E0B\u9762\u8FD9\u6837\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">abstract</span> <span class="token keyword">class</span> <span class="token class-name">AbstractPlayer</span> <span class="token punctuation">{</span>
+import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e}from"./app.615e41d8.js";const p={},t=e(`<h1 id="java\u62BD\u8C61\u7C7B" tabindex="-1"><a class="header-anchor" href="#java\u62BD\u8C61\u7C7B" aria-hidden="true">#</a> Java\u62BD\u8C61\u7C7B</h1><p>\u201C\u4E8C\u54E5\uFF0C\u4F60\u8FD9\u660E\u663E\u52A0\u5FEB\u4E86\u66F4\u65B0\u7684\u9891\u7387\u5440\uFF01\u201D\u4E09\u59B9\u5BF9\u4E8E\u6211\u6700\u8FD1\u7684\u809D\u52B2\u7531\u8877\u7684\u4F69\u670D\u4E86\u8D77\u6765\u3002</p><p>\u201C\u54C8\u54C8\uFF0C\u662F\u5440\uFF0C\u8FD9\u6B21\u4E0D\u80FD\u518D\u65AD\u66F4\u4E86\uFF0C\u6211\u8981\u518D\u66F4 175 \u7BC7\uFF0C\u603B\u8BA1 200 \u7BC7\uFF0C\u7ED9\u5E7F\u5927\u7684\u5B66\u5F1F\u5B66\u59B9\u4EEC\u4E00\u4E2A\u5B8C\u6574\u7684 Java \u5B66\u4E60\u4F53\u7CFB\u3002\u201D\u6211\u5BF9\u672A\u6765\u5145\u6EE1\u4E86\u4FE1\u5FC3\u3002</p><p>\u201C\u90A3\u5C31\u5F00\u59CB\u5427\u3002\u201D\u4E09\u59B9\u8BF4\u3002</p><hr><p>\u5B9A\u4E49\u62BD\u8C61\u7C7B\u7684\u65F6\u5019\u9700\u8981\u7528\u5230\u5173\u952E\u5B57 <code>abstract</code>\uFF0C\u653E\u5728 <code>class</code> \u5173\u952E\u5B57\u524D\uFF0C\u5C31\u50CF\u4E0B\u9762\u8FD9\u6837\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">abstract</span> <span class="token keyword">class</span> <span class="token class-name">AbstractPlayer</span> <span class="token punctuation">{</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><p>\u5173\u4E8E\u62BD\u8C61\u7C7B\u7684\u547D\u540D\uFF0C\u300A\u963F\u91CC\u7684 Java \u5F00\u53D1\u624B\u518C\u300B\u4E0A\u6709\u5F3A\u8C03\uFF0C\u201C\u62BD\u8C61\u7C7B\u547D\u540D\u8981\u4F7F\u7528 Abstract \u6216 Base \u5F00\u5934\u201D\uFF0C\u8FD9\u6761\u89C4\u7EA6\u8FD8\u662F\u503C\u5F97\u9075\u5B88\u7684\u3002</p><p>\u62BD\u8C61\u7C7B\u662F\u4E0D\u80FD\u5B9E\u4F8B\u5316\u7684\uFF0C\u5C1D\u8BD5\u901A\u8FC7 <code>new</code> \u5173\u952E\u5B57\u5B9E\u4F8B\u5316\u7684\u8BDD\uFF0C\u7F16\u8BD1\u5668\u4F1A\u62A5\u9519\uFF0C\u63D0\u793A\u201C\u7C7B\u662F\u62BD\u8C61\u7684\uFF0C\u4E0D\u80FD\u5B9E\u4F8B\u5316\u201D\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/object-class/abstract-01.png" alt=""></p><p>\u867D\u7136\u62BD\u8C61\u7C7B\u4E0D\u80FD\u5B9E\u4F8B\u5316\uFF0C\u4F46\u53EF\u4EE5\u6709\u5B50\u7C7B\u3002\u5B50\u7C7B\u901A\u8FC7 <code>extends</code> \u5173\u952E\u5B57\u6765\u7EE7\u627F\u62BD\u8C61\u7C7B\u3002\u5C31\u50CF\u4E0B\u9762\u8FD9\u6837\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">BasketballPlayer</span> <span class="token keyword">extends</span> <span class="token class-name">AbstractPlayer</span> <span class="token punctuation">{</span>
 <span class="token punctuation">}</span>
diff --git a/dist/assets/algorithm.html.66d3e273.js b/dist/assets/algorithm.html.8d44122f.js
similarity index 99%
rename from dist/assets/algorithm.html.66d3e273.js
rename to dist/assets/algorithm.html.8d44122f.js
index 6857a71f..b2dfb570 100644
--- a/dist/assets/algorithm.html.66d3e273.js
+++ b/dist/assets/algorithm.html.8d44122f.js
@@ -1,4 +1,4 @@
-import{_ as i}from"./plugin-vue_export-helper.21dcd24c.js";import{r,o as s,c as l,a as e,b as o,d as t,e as n}from"./app.a0271b9c.js";const p={},c=e("h1",{id:"\u7B97\u6CD5\u548C\u6570\u636E\u7ED3\u6784\u5B66\u4E60\u8DEF\u7EBF-\u5EFA\u8BAE\u6536\u85CF",tabindex:"-1"},[e("a",{class:"header-anchor",href:"#\u7B97\u6CD5\u548C\u6570\u636E\u7ED3\u6784\u5B66\u4E60\u8DEF\u7EBF-\u5EFA\u8BAE\u6536\u85CF","aria-hidden":"true"},"#"),t(" \u7B97\u6CD5\u548C\u6570\u636E\u7ED3\u6784\u5B66\u4E60\u8DEF\u7EBF\uFF08\u5EFA\u8BAE\u6536\u85CF\u{1F44D}\uFF09")],-1),d=e("p",null,"\u8BF4\u51FA\u6765\u8FD8\u771F\u6709\u70B9\u4E0D\u597D\u610F\u601D\u3002\u4E0A\u5B66\u90A3\u65F6\u5019\u50BB\uFF0C\u4E3A\u4E86\u6821\u62DB\uFF0C\u786C\u7740\u5934\u76AE\u5237\u300A\u7B97\u6CD5\u5BFC\u8BBA\u300B\u3001\u300A\u7F16\u7A0B\u73E0\u7391\u300B\uFF0C\u8FD8\u6709 LeetCode\uFF0C\u5237\u4E86\u5C0F\u4E00\u5E74\u3002",-1),h=e("p",null,"\u5237\u7740\u5FD8\u7740\uFF0C\u5FD8\u7740\u5237\u7740\uFF0C\u4E0D\u5237\u6015\u8003\u5230\uFF0C\u6700\u540E\u5237\u7684\u79C0\u53D1\u90FD\u7A00\u758F\u4E86\u3002",-1),_=t("\u7B49\u627E\u5230\u4E86\u5DE5\u4F5C\u540E\u624D\u604D\u7136\u5927\u609F\uFF0C\u539F\u6765\u5F53\u521D\u6839\u672C\u4E0D\u7528\u90A3\u4E48\u8F9B\u82E6\u3002\u8FD9\u4E0D\uFF0C\u521A\u597D\u6709\u5C0F\u4F19\u4F34\u5728\u300A"),b={href:"https://tobebetterjavaer.com/",target:"_blank",rel:"noopener noreferrer"},u=t("Java \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF"),g=t("\u300B\u4E0A\u95EE\u6211\u7B97\u6CD5\u7684\u5B66\u4E60\u8DEF\u7EBF\uFF0C\u6211\u5C31\u6BEB\u4E0D\u4FDD\u7559\u5730\u628A\u6211\u7B97\u6CD5\u65B9\u9762\u7684\u5B66\u4E60\u7ECF\u9A8C\u5206\u4EAB\u51FA\u6765\uFF0C\u5E0C\u671B\u80FD\u7ED9\u5927\u5BB6\u4E00\u70B9\u70B9\u542F\u53D1\u548C\u5E2E\u52A9\u3002"),m=n(`<p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/algorithm-59f3bc36-4e6c-48c0-86e5-8afdd6165147.png" alt=""></p><p>\u6211\u753B\u4E86\u4E00\u5F20\u56FE\uFF0C\u91CC\u9762\u51E0\u4E4E\u6DB5\u76D6\u4E86\u6240\u6709\u6570\u636E\u7ED3\u6784\u4E0E\u7B97\u6CD5\u4E66\u7C4D\u4E2D\u90FD\u4F1A\u8BB2\u5230\u7684\u77E5\u8BC6\u70B9\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/algorithm-220e86a7-fa5d-44a2-a560-3cb6cfa70ad0.png" alt=""></p><p>\u4F46\u8BB2\u826F\u5FC3\u8BDD\uFF0C\u5BF9\u4E8E\u4E00\u4E2A\u521D\u5B66\u8005\uFF0C\u6216\u8005\u4E0D\u6253\u7B97\u5377\u7B97\u6CD5\u5C97\u7684\u7A0B\u5E8F\u5458\u6765\u8BF4\uFF0C\u5B8C\u5168\u5C31\u6CA1\u5FC5\u8981\u628A\u601D\u7EF4\u5BFC\u56FE\u91CC\u9762\u7684\u6240\u6709\u77E5\u8BC6\u70B9\u90FD\u5B66\u4E86\uFF0C\u90A3\u6837\u5C31\u592A\u4E0D\u9AD8\u6548\u4E86\u3002</p><p>\u6211\u4EEC\u5B66\u4E60\u6570\u636E\u7ED3\u6784\u4E0E\u7B97\u6CD5\uFF0C\u4E5F\u5F97\u8BB2\u7A76\u7B56\u7565\u3002\u6211\u7684\u5EFA\u8BAE\u662F\u8FD9\u6837\u7684\uFF08\u6572\u9ED1\u677F\u3001\u5212\u91CD\u70B9\u4E86\u554A\uFF09\uFF1A</p><p><strong>7 \u4E2A\u6570\u636E\u7ED3\u6784</strong>\uFF1A</p><ul><li>\u6570\u7EC4</li><li>\u94FE\u8868</li><li>\u6808</li><li>\u961F\u5217</li><li>\u54C8\u5E0C\u8868</li><li>\u4E8C\u53C9\u6811</li><li>\u5806</li></ul><p><strong>10 \u4E2A\u7B97\u6CD5</strong>\uFF1A</p><ul><li>\u9012\u5F52</li><li>\u6392\u5E8F</li><li>\u4E8C\u5206\u67E5\u627E</li><li>\u641C\u7D22</li><li>\u54C8\u5E0C\u7B97\u6CD5</li><li>\u8D2A\u5FC3\u7B97\u6CD5</li><li>\u5206\u6CBB\u7B97\u6CD5</li><li>\u56DE\u6EAF\u7B97\u6CD5</li><li>\u52A8\u6001\u89C4\u5212</li><li>\u5B57\u7B26\u4E32\u5339\u914D\u7B97\u6CD5</li></ul><p>\u8FD9\u4E9B\u662F\u5B66\u4E60\u6570\u636E\u7ED3\u6784\u4E0E\u7B97\u6CD5\u65F6\u7684\u91CD\u70B9\u3002\u5F88\u591A\u4EBA\u5728\u7B2C\u4E00\u6B21\u63A5\u89E6\u6570\u636E\u7ED3\u6784\u4E0E\u7B97\u6CD5\u8FD9\u95E8\u8BFE\u65F6\uFF0C\u5F80\u5F80\u4F1A\u89C9\u5F97\u5F88\u62BD\u8C61\uFF0C\u5F88\u96BE\u641E\u61C2\uFF0C\u4EE5\u81F3\u4E8E\u7AD9\u5728\u95E8\u5916\u5F98\u5F8A\u4E0D\u524D\u3002</p><p>\u5176\u5B9E\u771F\u6B63\u7684\u539F\u56E0\u662F\u6CA1\u6709\u627E\u5230\u597D\u7684\u5B66\u4E60\u65B9\u6CD5\uFF0C\u6CA1\u6709\u6293\u4F4F\u5B66\u4E60\u7684\u91CD\u70B9\u3002\u76F8\u4FE1\u4F60\u8BA4\u771F\u770B\u5B8C\u6211\u8FD9\u6761\u5B66\u4E60\u8DEF\u7EBF\u540E\uFF0C\u5B66\u8D77\u6765\u5C31\u4F1A\u6709\u7684\u653E\u77E2\u3001\u4E8B\u534A\u529F\u500D\u4E86\u3002</p><h3 id="\u4E00\u3001\u4EC0\u4E48\u662F\u6570\u636E\u7ED3\u6784" tabindex="-1"><a class="header-anchor" href="#\u4E00\u3001\u4EC0\u4E48\u662F\u6570\u636E\u7ED3\u6784" aria-hidden="true">#</a> \u4E00\u3001\u4EC0\u4E48\u662F\u6570\u636E\u7ED3\u6784</h3><p>\u6570\u636E\u7ED3\u6784\u662F\u4E00\u79CD\u5177\u6709\u4E00\u5B9A\u903B\u8F91\u5173\u7CFB\uFF0C\u5728\u8BA1\u7B97\u673A\u4E2D\u5E94\u7528\u67D0\u79CD\u5B58\u50A8\u7ED3\u6784\uFF0C\u5E76\u4E14\u5C01\u88C5\u4E86\u76F8\u5E94\u64CD\u4F5C\u7684\u6570\u636E\u5143\u7D20\u96C6\u5408\u3002\u5B83\u5305\u542B\u4E09\u65B9\u9762\u7684\u5185\u5BB9\uFF0C\u903B\u8F91\u5173\u7CFB\u3001\u5B58\u50A8\u5173\u7CFB\u53CA\u64CD\u4F5C\u3002\u4E0D\u540C\u79CD\u7C7B\u7684\u6570\u636E\u7ED3\u6784\u9002\u5408\u4E8E\u4E0D\u540C\u79CD\u7C7B\u7684\u5E94\u7528\uFF0C\u800C\u90E8\u5206\u751A\u81F3\u4E13\u95E8\u7528\u4E8E\u7279\u5B9A\u7684\u4F5C\u4E1A\u4EFB\u52A1\u3002\u4F8B\u5982\uFF0C\u8BA1\u7B97\u673A\u7F51\u7EDC\u4F9D\u8D56\u4E8E\u8DEF\u7531\u8868\u8FD0\u4F5C\uFF0CB \u6811\u9AD8\u5EA6\u9002\u7528\u4E8E\u6570\u636E\u5E93\u7684\u5C01\u88C5\u3002</p><p>\u7B80\u5355\u70B9\u8BF4\uFF0C\u6570\u636E\u7ED3\u6784\u5C31\u662F\u628A\u4E00\u5806\u6570\u636E\uFF0C\u6309\u7167\u67D0\u79CD\u683C\u5F0F\u63C9\u6210\u4E00\u5768\u3002</p><p>\u5927\u5BB6\u559C\u6B22\u5403\u5BAB\u4FDD\u9E21\u4E01\u5417\uFF1F</p><p>\u53CD\u6B63\u4E8C\u54E5\u633A\u559C\u6B22\u8FD9\u9053\u83DC\u7684\u3002\u6211\u5C31\u4EE5\u5BAB\u4FDD\u9E21\u4E01\u4E3A\u4F8B\uFF0C\u6765\u8BB2\u4E00\u8BB2\u6570\u636E\u7ED3\u6784\u5427\u3002\u7EF4\u57FA\u767E\u79D1\u4E0A\u662F\u8FD9\u6837\u5B9A\u4E49\u7684\u3002</p><p>\u5BAB\u4FDD\u9E21\u4E01\uFF08\u82F1\u8BED\uFF1AKung Pao chicken\u6216Kung-Pao Chicken\uFF09\uFF0C\u53C8\u79F0\u5BAB\u7206\u9E21\u4E01\uFF0C\u5448\u7CCA\u8FA3\u8354\u679D\u5473\uFF0C\u6E90\u4E8E\u9ED4\u83DC\u3001\u6D41\u4F20\u81F3\u9C81\u800C\u540E\u6210\u4E8E\u5DDD\u83DC\u7684\u4E00\u9053\u5DDD\u5473\u540D\u83DC\u3002\u8D35\u5DDE\u3001\u5C71\u4E1C\u548C\u56DB\u5DDD\u4E09\u5730\u5BF9\u8FD9\u9053\u83DC\u7684\u505A\u6CD5\u4E0D\u5B8C\u5168\u4E00\u6837\uFF0C\u79F0\u547C\u4E5F\u6709\u5DEE\u5F02\u3002\u8D35\u5DDE\u79F0\u4E3A\u7CCA\u8FA3\u5B50\u9E21\u4E01\uFF0C\u5C71\u4E1C\u5219\u540D\u4E3A\u9171\u7206\u9E21\u4E01\uFF0C\u800C\u56DB\u5DDD\u662F\u4EE5\u5BAB\u4FDD\u9E21\u4E01\u4E3A\u540D\u7684\u3002</p><p>\u6765\uFF0C\u62BD\u8C61\u4E0B\u5BAB\u4FDD\u9E21\u4E01\u3002</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>struct KungPaoChicken {
+import{_ as i}from"./plugin-vue_export-helper.21dcd24c.js";import{r,o as s,c as l,a as e,b as o,d as t,e as n}from"./app.615e41d8.js";const p={},c=e("h1",{id:"\u7B97\u6CD5\u548C\u6570\u636E\u7ED3\u6784\u5B66\u4E60\u8DEF\u7EBF-\u5EFA\u8BAE\u6536\u85CF",tabindex:"-1"},[e("a",{class:"header-anchor",href:"#\u7B97\u6CD5\u548C\u6570\u636E\u7ED3\u6784\u5B66\u4E60\u8DEF\u7EBF-\u5EFA\u8BAE\u6536\u85CF","aria-hidden":"true"},"#"),t(" \u7B97\u6CD5\u548C\u6570\u636E\u7ED3\u6784\u5B66\u4E60\u8DEF\u7EBF\uFF08\u5EFA\u8BAE\u6536\u85CF\u{1F44D}\uFF09")],-1),d=e("p",null,"\u8BF4\u51FA\u6765\u8FD8\u771F\u6709\u70B9\u4E0D\u597D\u610F\u601D\u3002\u4E0A\u5B66\u90A3\u65F6\u5019\u50BB\uFF0C\u4E3A\u4E86\u6821\u62DB\uFF0C\u786C\u7740\u5934\u76AE\u5237\u300A\u7B97\u6CD5\u5BFC\u8BBA\u300B\u3001\u300A\u7F16\u7A0B\u73E0\u7391\u300B\uFF0C\u8FD8\u6709 LeetCode\uFF0C\u5237\u4E86\u5C0F\u4E00\u5E74\u3002",-1),h=e("p",null,"\u5237\u7740\u5FD8\u7740\uFF0C\u5FD8\u7740\u5237\u7740\uFF0C\u4E0D\u5237\u6015\u8003\u5230\uFF0C\u6700\u540E\u5237\u7684\u79C0\u53D1\u90FD\u7A00\u758F\u4E86\u3002",-1),_=t("\u7B49\u627E\u5230\u4E86\u5DE5\u4F5C\u540E\u624D\u604D\u7136\u5927\u609F\uFF0C\u539F\u6765\u5F53\u521D\u6839\u672C\u4E0D\u7528\u90A3\u4E48\u8F9B\u82E6\u3002\u8FD9\u4E0D\uFF0C\u521A\u597D\u6709\u5C0F\u4F19\u4F34\u5728\u300A"),b={href:"https://tobebetterjavaer.com/",target:"_blank",rel:"noopener noreferrer"},u=t("Java \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF"),g=t("\u300B\u4E0A\u95EE\u6211\u7B97\u6CD5\u7684\u5B66\u4E60\u8DEF\u7EBF\uFF0C\u6211\u5C31\u6BEB\u4E0D\u4FDD\u7559\u5730\u628A\u6211\u7B97\u6CD5\u65B9\u9762\u7684\u5B66\u4E60\u7ECF\u9A8C\u5206\u4EAB\u51FA\u6765\uFF0C\u5E0C\u671B\u80FD\u7ED9\u5927\u5BB6\u4E00\u70B9\u70B9\u542F\u53D1\u548C\u5E2E\u52A9\u3002"),m=n(`<p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/algorithm-59f3bc36-4e6c-48c0-86e5-8afdd6165147.png" alt=""></p><p>\u6211\u753B\u4E86\u4E00\u5F20\u56FE\uFF0C\u91CC\u9762\u51E0\u4E4E\u6DB5\u76D6\u4E86\u6240\u6709\u6570\u636E\u7ED3\u6784\u4E0E\u7B97\u6CD5\u4E66\u7C4D\u4E2D\u90FD\u4F1A\u8BB2\u5230\u7684\u77E5\u8BC6\u70B9\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/algorithm-220e86a7-fa5d-44a2-a560-3cb6cfa70ad0.png" alt=""></p><p>\u4F46\u8BB2\u826F\u5FC3\u8BDD\uFF0C\u5BF9\u4E8E\u4E00\u4E2A\u521D\u5B66\u8005\uFF0C\u6216\u8005\u4E0D\u6253\u7B97\u5377\u7B97\u6CD5\u5C97\u7684\u7A0B\u5E8F\u5458\u6765\u8BF4\uFF0C\u5B8C\u5168\u5C31\u6CA1\u5FC5\u8981\u628A\u601D\u7EF4\u5BFC\u56FE\u91CC\u9762\u7684\u6240\u6709\u77E5\u8BC6\u70B9\u90FD\u5B66\u4E86\uFF0C\u90A3\u6837\u5C31\u592A\u4E0D\u9AD8\u6548\u4E86\u3002</p><p>\u6211\u4EEC\u5B66\u4E60\u6570\u636E\u7ED3\u6784\u4E0E\u7B97\u6CD5\uFF0C\u4E5F\u5F97\u8BB2\u7A76\u7B56\u7565\u3002\u6211\u7684\u5EFA\u8BAE\u662F\u8FD9\u6837\u7684\uFF08\u6572\u9ED1\u677F\u3001\u5212\u91CD\u70B9\u4E86\u554A\uFF09\uFF1A</p><p><strong>7 \u4E2A\u6570\u636E\u7ED3\u6784</strong>\uFF1A</p><ul><li>\u6570\u7EC4</li><li>\u94FE\u8868</li><li>\u6808</li><li>\u961F\u5217</li><li>\u54C8\u5E0C\u8868</li><li>\u4E8C\u53C9\u6811</li><li>\u5806</li></ul><p><strong>10 \u4E2A\u7B97\u6CD5</strong>\uFF1A</p><ul><li>\u9012\u5F52</li><li>\u6392\u5E8F</li><li>\u4E8C\u5206\u67E5\u627E</li><li>\u641C\u7D22</li><li>\u54C8\u5E0C\u7B97\u6CD5</li><li>\u8D2A\u5FC3\u7B97\u6CD5</li><li>\u5206\u6CBB\u7B97\u6CD5</li><li>\u56DE\u6EAF\u7B97\u6CD5</li><li>\u52A8\u6001\u89C4\u5212</li><li>\u5B57\u7B26\u4E32\u5339\u914D\u7B97\u6CD5</li></ul><p>\u8FD9\u4E9B\u662F\u5B66\u4E60\u6570\u636E\u7ED3\u6784\u4E0E\u7B97\u6CD5\u65F6\u7684\u91CD\u70B9\u3002\u5F88\u591A\u4EBA\u5728\u7B2C\u4E00\u6B21\u63A5\u89E6\u6570\u636E\u7ED3\u6784\u4E0E\u7B97\u6CD5\u8FD9\u95E8\u8BFE\u65F6\uFF0C\u5F80\u5F80\u4F1A\u89C9\u5F97\u5F88\u62BD\u8C61\uFF0C\u5F88\u96BE\u641E\u61C2\uFF0C\u4EE5\u81F3\u4E8E\u7AD9\u5728\u95E8\u5916\u5F98\u5F8A\u4E0D\u524D\u3002</p><p>\u5176\u5B9E\u771F\u6B63\u7684\u539F\u56E0\u662F\u6CA1\u6709\u627E\u5230\u597D\u7684\u5B66\u4E60\u65B9\u6CD5\uFF0C\u6CA1\u6709\u6293\u4F4F\u5B66\u4E60\u7684\u91CD\u70B9\u3002\u76F8\u4FE1\u4F60\u8BA4\u771F\u770B\u5B8C\u6211\u8FD9\u6761\u5B66\u4E60\u8DEF\u7EBF\u540E\uFF0C\u5B66\u8D77\u6765\u5C31\u4F1A\u6709\u7684\u653E\u77E2\u3001\u4E8B\u534A\u529F\u500D\u4E86\u3002</p><h3 id="\u4E00\u3001\u4EC0\u4E48\u662F\u6570\u636E\u7ED3\u6784" tabindex="-1"><a class="header-anchor" href="#\u4E00\u3001\u4EC0\u4E48\u662F\u6570\u636E\u7ED3\u6784" aria-hidden="true">#</a> \u4E00\u3001\u4EC0\u4E48\u662F\u6570\u636E\u7ED3\u6784</h3><p>\u6570\u636E\u7ED3\u6784\u662F\u4E00\u79CD\u5177\u6709\u4E00\u5B9A\u903B\u8F91\u5173\u7CFB\uFF0C\u5728\u8BA1\u7B97\u673A\u4E2D\u5E94\u7528\u67D0\u79CD\u5B58\u50A8\u7ED3\u6784\uFF0C\u5E76\u4E14\u5C01\u88C5\u4E86\u76F8\u5E94\u64CD\u4F5C\u7684\u6570\u636E\u5143\u7D20\u96C6\u5408\u3002\u5B83\u5305\u542B\u4E09\u65B9\u9762\u7684\u5185\u5BB9\uFF0C\u903B\u8F91\u5173\u7CFB\u3001\u5B58\u50A8\u5173\u7CFB\u53CA\u64CD\u4F5C\u3002\u4E0D\u540C\u79CD\u7C7B\u7684\u6570\u636E\u7ED3\u6784\u9002\u5408\u4E8E\u4E0D\u540C\u79CD\u7C7B\u7684\u5E94\u7528\uFF0C\u800C\u90E8\u5206\u751A\u81F3\u4E13\u95E8\u7528\u4E8E\u7279\u5B9A\u7684\u4F5C\u4E1A\u4EFB\u52A1\u3002\u4F8B\u5982\uFF0C\u8BA1\u7B97\u673A\u7F51\u7EDC\u4F9D\u8D56\u4E8E\u8DEF\u7531\u8868\u8FD0\u4F5C\uFF0CB \u6811\u9AD8\u5EA6\u9002\u7528\u4E8E\u6570\u636E\u5E93\u7684\u5C01\u88C5\u3002</p><p>\u7B80\u5355\u70B9\u8BF4\uFF0C\u6570\u636E\u7ED3\u6784\u5C31\u662F\u628A\u4E00\u5806\u6570\u636E\uFF0C\u6309\u7167\u67D0\u79CD\u683C\u5F0F\u63C9\u6210\u4E00\u5768\u3002</p><p>\u5927\u5BB6\u559C\u6B22\u5403\u5BAB\u4FDD\u9E21\u4E01\u5417\uFF1F</p><p>\u53CD\u6B63\u4E8C\u54E5\u633A\u559C\u6B22\u8FD9\u9053\u83DC\u7684\u3002\u6211\u5C31\u4EE5\u5BAB\u4FDD\u9E21\u4E01\u4E3A\u4F8B\uFF0C\u6765\u8BB2\u4E00\u8BB2\u6570\u636E\u7ED3\u6784\u5427\u3002\u7EF4\u57FA\u767E\u79D1\u4E0A\u662F\u8FD9\u6837\u5B9A\u4E49\u7684\u3002</p><p>\u5BAB\u4FDD\u9E21\u4E01\uFF08\u82F1\u8BED\uFF1AKung Pao chicken\u6216Kung-Pao Chicken\uFF09\uFF0C\u53C8\u79F0\u5BAB\u7206\u9E21\u4E01\uFF0C\u5448\u7CCA\u8FA3\u8354\u679D\u5473\uFF0C\u6E90\u4E8E\u9ED4\u83DC\u3001\u6D41\u4F20\u81F3\u9C81\u800C\u540E\u6210\u4E8E\u5DDD\u83DC\u7684\u4E00\u9053\u5DDD\u5473\u540D\u83DC\u3002\u8D35\u5DDE\u3001\u5C71\u4E1C\u548C\u56DB\u5DDD\u4E09\u5730\u5BF9\u8FD9\u9053\u83DC\u7684\u505A\u6CD5\u4E0D\u5B8C\u5168\u4E00\u6837\uFF0C\u79F0\u547C\u4E5F\u6709\u5DEE\u5F02\u3002\u8D35\u5DDE\u79F0\u4E3A\u7CCA\u8FA3\u5B50\u9E21\u4E01\uFF0C\u5C71\u4E1C\u5219\u540D\u4E3A\u9171\u7206\u9E21\u4E01\uFF0C\u800C\u56DB\u5DDD\u662F\u4EE5\u5BAB\u4FDD\u9E21\u4E01\u4E3A\u540D\u7684\u3002</p><p>\u6765\uFF0C\u62BD\u8C61\u4E0B\u5BAB\u4FDD\u9E21\u4E01\u3002</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>struct KungPaoChicken {
   \u9E21\u8089 = []
   \u82B1\u751F = []
   \u8471\u6BB5 = []
diff --git a/dist/assets/ali-executors.html.e9951d8a.js b/dist/assets/ali-executors.html.3e2ae653.js
similarity index 99%
rename from dist/assets/ali-executors.html.e9951d8a.js
rename to dist/assets/ali-executors.html.3e2ae653.js
index 8f824969..a482d6d3 100644
--- a/dist/assets/ali-executors.html.e9951d8a.js
+++ b/dist/assets/ali-executors.html.3e2ae653.js
@@ -1,4 +1,4 @@
-import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as a,c as s,e}from"./app.a0271b9c.js";const t={},o=e(`<h1 id="\u4E3A\u4EC0\u4E48\u963F\u91CC\u5DF4\u5DF4\u8981\u7981\u7528executors\u521B\u5EFA\u7EBF\u7A0B\u6C60" tabindex="-1"><a class="header-anchor" href="#\u4E3A\u4EC0\u4E48\u963F\u91CC\u5DF4\u5DF4\u8981\u7981\u7528executors\u521B\u5EFA\u7EBF\u7A0B\u6C60" aria-hidden="true">#</a> \u4E3A\u4EC0\u4E48\u963F\u91CC\u5DF4\u5DF4\u8981\u7981\u7528Executors\u521B\u5EFA\u7EBF\u7A0B\u6C60\uFF1F</h1><p>\u770B\u963F\u91CC\u5DF4\u5DF4\u5F00\u53D1\u624B\u518C\u5E76\u53D1\u7F16\u7A0B\u8FD9\u5757\u6709\u4E00\u6761\uFF1A<strong>\u7EBF\u7A0B\u6C60\u4E0D\u5141\u8BB8\u4F7F\u7528 Executors \u53BB\u521B\u5EFA\uFF0C\u800C\u662F\u901A\u8FC7 ThreadPoolExecutor \u7684\u65B9\u5F0F</strong>\uFF0C\u4ECA\u5929\u6211\u4EEC\u6765\u901A\u8FC7\u6E90\u7801\u5206\u6790\u4E00\u4E0B\u7981\u7528\u7684\u539F\u56E0\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/ali-executors-1.png" alt=""></p><p>\u901A\u8FC7\u9605\u8BFB\u672C\u7BC7\u6587\u7AE0\u4F60\u5C06\u4E86\u89E3\u5230\uFF1A</p><ul><li>\u7EBF\u7A0B\u6C60\u7684\u5B9A\u4E49</li><li>Executors \u521B\u5EFA\u7EBF\u7A0B\u6C60\u7684\u51E0\u79CD\u65B9\u5F0F</li><li>ThreadPoolExecutor \u5BF9\u8C61</li><li>\u7EBF\u7A0B\u6C60\u6267\u884C\u4EFB\u52A1\u903B\u8F91\u548C\u7EBF\u7A0B\u6C60\u53C2\u6570\u7684\u5173\u7CFB</li><li>Executors \u521B\u5EFA\u8FD4\u56DE ThreadPoolExecutor \u5BF9\u8C61</li><li>OOM \u5F02\u5E38\u6D4B\u8BD5</li><li>\u5982\u4F55\u5B9A\u4E49\u7EBF\u7A0B\u6C60\u53C2\u6570</li></ul><p>\u5982\u679C\u53EA\u60F3\u77E5\u9053\u539F\u56E0\u53EF\u4EE5\u76F4\u63A5\u62C9\u5230\u6587\u672B\u603B\u7ED3\u90A3\u3002</p><h3 id="\u4E00\u3001\u7EBF\u7A0B\u6C60\u7684\u5B9A\u4E49" tabindex="-1"><a class="header-anchor" href="#\u4E00\u3001\u7EBF\u7A0B\u6C60\u7684\u5B9A\u4E49" aria-hidden="true">#</a> \u4E00\u3001\u7EBF\u7A0B\u6C60\u7684\u5B9A\u4E49</h3><p>\u7BA1\u7406\u4E00\u7EC4\u5DE5\u4F5C\u7EBF\u7A0B\u3002\u901A\u8FC7\u7EBF\u7A0B\u6C60\u590D\u7528\u7EBF\u7A0B\u6709\u4EE5\u4E0B\u51E0\u70B9\u4F18\u70B9\uFF1A</p><ul><li>\u51CF\u5C11\u8D44\u6E90\u521B\u5EFA =&gt; \u51CF\u5C11\u5185\u5B58\u5F00\u9500\uFF0C\u521B\u5EFA\u7EBF\u7A0B\u5360\u7528\u5185\u5B58</li><li>\u964D\u4F4E\u7CFB\u7EDF\u5F00\u9500 =&gt; \u521B\u5EFA\u7EBF\u7A0B\u9700\u8981\u65F6\u95F4\uFF0C\u4F1A\u5EF6\u8FDF\u5904\u7406\u7684\u8BF7\u6C42</li><li>\u63D0\u9AD8\u7A33\u5B9A\u7A33\u5B9A\u6027 =&gt; \u907F\u514D\u65E0\u9650\u521B\u5EFA\u7EBF\u7A0B\u5F15\u8D77\u7684 OutOfMemoryError\u3010\u7B80\u79F0 OOM\u3011</li></ul><p>Executors \u521B\u5EFA\u7EBF\u7A0B\u6C60\u7684\u65B9\u5F0F\uFF0C\u6839\u636E\u8FD4\u56DE\u7684\u5BF9\u8C61\u7C7B\u578B\u521B\u5EFA\u7EBF\u7A0B\u6C60\u53EF\u4EE5\u5206\u4E3A\u4E09\u7C7B\uFF1A</p><ul><li>\u521B\u5EFA\u8FD4\u56DE ThreadPoolExecutor \u5BF9\u8C61</li><li>\u521B\u5EFA\u8FD4\u56DE ScheduleThreadPoolExecutor \u5BF9\u8C61</li><li>\u521B\u5EFA\u8FD4\u56DE ForkJoinPool \u5BF9\u8C61</li></ul><p>\u672C\u6587\u53EA\u8BA8\u8BBA\u521B\u5EFA\u8FD4\u56DE ThreadPoolExecutor \u5BF9\u8C61\u3002</p><h3 id="\u4E8C\u3001threadpoolexecutor-\u5BF9\u8C61" tabindex="-1"><a class="header-anchor" href="#\u4E8C\u3001threadpoolexecutor-\u5BF9\u8C61" aria-hidden="true">#</a> \u4E8C\u3001ThreadPoolExecutor \u5BF9\u8C61</h3><p>\u5728\u4ECB\u7ECD Executors \u521B\u5EFA\u7EBF\u7A0B\u6C60\u65B9\u6CD5\u524D\u5148\u4ECB\u7ECD\u4E00\u4E0B ThreadPoolExecutor\uFF0C\u56E0\u4E3A\u8FD9\u4E9B\u521B\u5EFA\u7EBF\u7A0B\u6C60\u7684\u9759\u6001\u65B9\u6CD5\u90FD\u662F\u8FD4\u56DE ThreadPoolExecutor \u5BF9\u8C61\uFF0C\u548C\u6211\u4EEC\u624B\u52A8\u521B\u5EFA ThreadPoolExecutor \u5BF9\u8C61\u7684\u533A\u522B\u5C31\u662F\u6211\u4EEC\u4E0D\u9700\u8981\u81EA\u5DF1\u4F20\u6784\u9020\u65B9\u6CD5\u7684\u53C2\u6570\u3002</p><p>ThreadPoolExecutor \u7684\u6784\u9020\u65B9\u6CD5\u5171\u6709\u56DB\u4E2A\uFF0C\u4F46\u6700\u7EC8\u8C03\u7528\u7684\u90FD\u662F\u540C\u4E00\u4E2A\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token class-name">ThreadPoolExecutor</span><span class="token punctuation">(</span><span class="token keyword">int</span> corePoolSize<span class="token punctuation">,</span>
+import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as a,c as s,e}from"./app.615e41d8.js";const t={},o=e(`<h1 id="\u4E3A\u4EC0\u4E48\u963F\u91CC\u5DF4\u5DF4\u8981\u7981\u7528executors\u521B\u5EFA\u7EBF\u7A0B\u6C60" tabindex="-1"><a class="header-anchor" href="#\u4E3A\u4EC0\u4E48\u963F\u91CC\u5DF4\u5DF4\u8981\u7981\u7528executors\u521B\u5EFA\u7EBF\u7A0B\u6C60" aria-hidden="true">#</a> \u4E3A\u4EC0\u4E48\u963F\u91CC\u5DF4\u5DF4\u8981\u7981\u7528Executors\u521B\u5EFA\u7EBF\u7A0B\u6C60\uFF1F</h1><p>\u770B\u963F\u91CC\u5DF4\u5DF4\u5F00\u53D1\u624B\u518C\u5E76\u53D1\u7F16\u7A0B\u8FD9\u5757\u6709\u4E00\u6761\uFF1A<strong>\u7EBF\u7A0B\u6C60\u4E0D\u5141\u8BB8\u4F7F\u7528 Executors \u53BB\u521B\u5EFA\uFF0C\u800C\u662F\u901A\u8FC7 ThreadPoolExecutor \u7684\u65B9\u5F0F</strong>\uFF0C\u4ECA\u5929\u6211\u4EEC\u6765\u901A\u8FC7\u6E90\u7801\u5206\u6790\u4E00\u4E0B\u7981\u7528\u7684\u539F\u56E0\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/ali-executors-1.png" alt=""></p><p>\u901A\u8FC7\u9605\u8BFB\u672C\u7BC7\u6587\u7AE0\u4F60\u5C06\u4E86\u89E3\u5230\uFF1A</p><ul><li>\u7EBF\u7A0B\u6C60\u7684\u5B9A\u4E49</li><li>Executors \u521B\u5EFA\u7EBF\u7A0B\u6C60\u7684\u51E0\u79CD\u65B9\u5F0F</li><li>ThreadPoolExecutor \u5BF9\u8C61</li><li>\u7EBF\u7A0B\u6C60\u6267\u884C\u4EFB\u52A1\u903B\u8F91\u548C\u7EBF\u7A0B\u6C60\u53C2\u6570\u7684\u5173\u7CFB</li><li>Executors \u521B\u5EFA\u8FD4\u56DE ThreadPoolExecutor \u5BF9\u8C61</li><li>OOM \u5F02\u5E38\u6D4B\u8BD5</li><li>\u5982\u4F55\u5B9A\u4E49\u7EBF\u7A0B\u6C60\u53C2\u6570</li></ul><p>\u5982\u679C\u53EA\u60F3\u77E5\u9053\u539F\u56E0\u53EF\u4EE5\u76F4\u63A5\u62C9\u5230\u6587\u672B\u603B\u7ED3\u90A3\u3002</p><h3 id="\u4E00\u3001\u7EBF\u7A0B\u6C60\u7684\u5B9A\u4E49" tabindex="-1"><a class="header-anchor" href="#\u4E00\u3001\u7EBF\u7A0B\u6C60\u7684\u5B9A\u4E49" aria-hidden="true">#</a> \u4E00\u3001\u7EBF\u7A0B\u6C60\u7684\u5B9A\u4E49</h3><p>\u7BA1\u7406\u4E00\u7EC4\u5DE5\u4F5C\u7EBF\u7A0B\u3002\u901A\u8FC7\u7EBF\u7A0B\u6C60\u590D\u7528\u7EBF\u7A0B\u6709\u4EE5\u4E0B\u51E0\u70B9\u4F18\u70B9\uFF1A</p><ul><li>\u51CF\u5C11\u8D44\u6E90\u521B\u5EFA =&gt; \u51CF\u5C11\u5185\u5B58\u5F00\u9500\uFF0C\u521B\u5EFA\u7EBF\u7A0B\u5360\u7528\u5185\u5B58</li><li>\u964D\u4F4E\u7CFB\u7EDF\u5F00\u9500 =&gt; \u521B\u5EFA\u7EBF\u7A0B\u9700\u8981\u65F6\u95F4\uFF0C\u4F1A\u5EF6\u8FDF\u5904\u7406\u7684\u8BF7\u6C42</li><li>\u63D0\u9AD8\u7A33\u5B9A\u7A33\u5B9A\u6027 =&gt; \u907F\u514D\u65E0\u9650\u521B\u5EFA\u7EBF\u7A0B\u5F15\u8D77\u7684 OutOfMemoryError\u3010\u7B80\u79F0 OOM\u3011</li></ul><p>Executors \u521B\u5EFA\u7EBF\u7A0B\u6C60\u7684\u65B9\u5F0F\uFF0C\u6839\u636E\u8FD4\u56DE\u7684\u5BF9\u8C61\u7C7B\u578B\u521B\u5EFA\u7EBF\u7A0B\u6C60\u53EF\u4EE5\u5206\u4E3A\u4E09\u7C7B\uFF1A</p><ul><li>\u521B\u5EFA\u8FD4\u56DE ThreadPoolExecutor \u5BF9\u8C61</li><li>\u521B\u5EFA\u8FD4\u56DE ScheduleThreadPoolExecutor \u5BF9\u8C61</li><li>\u521B\u5EFA\u8FD4\u56DE ForkJoinPool \u5BF9\u8C61</li></ul><p>\u672C\u6587\u53EA\u8BA8\u8BBA\u521B\u5EFA\u8FD4\u56DE ThreadPoolExecutor \u5BF9\u8C61\u3002</p><h3 id="\u4E8C\u3001threadpoolexecutor-\u5BF9\u8C61" tabindex="-1"><a class="header-anchor" href="#\u4E8C\u3001threadpoolexecutor-\u5BF9\u8C61" aria-hidden="true">#</a> \u4E8C\u3001ThreadPoolExecutor \u5BF9\u8C61</h3><p>\u5728\u4ECB\u7ECD Executors \u521B\u5EFA\u7EBF\u7A0B\u6C60\u65B9\u6CD5\u524D\u5148\u4ECB\u7ECD\u4E00\u4E0B ThreadPoolExecutor\uFF0C\u56E0\u4E3A\u8FD9\u4E9B\u521B\u5EFA\u7EBF\u7A0B\u6C60\u7684\u9759\u6001\u65B9\u6CD5\u90FD\u662F\u8FD4\u56DE ThreadPoolExecutor \u5BF9\u8C61\uFF0C\u548C\u6211\u4EEC\u624B\u52A8\u521B\u5EFA ThreadPoolExecutor \u5BF9\u8C61\u7684\u533A\u522B\u5C31\u662F\u6211\u4EEC\u4E0D\u9700\u8981\u81EA\u5DF1\u4F20\u6784\u9020\u65B9\u6CD5\u7684\u53C2\u6570\u3002</p><p>ThreadPoolExecutor \u7684\u6784\u9020\u65B9\u6CD5\u5171\u6709\u56DB\u4E2A\uFF0C\u4F46\u6700\u7EC8\u8C03\u7528\u7684\u90FD\u662F\u540C\u4E00\u4E2A\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token class-name">ThreadPoolExecutor</span><span class="token punctuation">(</span><span class="token keyword">int</span> corePoolSize<span class="token punctuation">,</span>
  <span class="token keyword">int</span> maximumPoolSize<span class="token punctuation">,</span>
  <span class="token keyword">long</span> keepAliveTime<span class="token punctuation">,</span>
  <span class="token class-name">TimeUnit</span> unit<span class="token punctuation">,</span>
diff --git a/dist/assets/aliyun-shuaiguo-gongchengshi.html.80a83c0a.js b/dist/assets/aliyun-shuaiguo-gongchengshi.html.af9a0166.js
similarity index 99%
rename from dist/assets/aliyun-shuaiguo-gongchengshi.html.80a83c0a.js
rename to dist/assets/aliyun-shuaiguo-gongchengshi.html.af9a0166.js
index 47814f6e..d3dd6711 100644
--- a/dist/assets/aliyun-shuaiguo-gongchengshi.html.80a83c0a.js
+++ b/dist/assets/aliyun-shuaiguo-gongchengshi.html.af9a0166.js
@@ -1 +1 @@
-import{_ as e}from"./plugin-vue_export-helper.21dcd24c.js";import{o as a,c as t,e as o}from"./app.a0271b9c.js";const i={},p=o('<p>\u771F\u4E0D\u662F\u6211\u6709\u610F\u8981\u9ED1\u8FD9\u4E2A\u963F\u91CC\u4E91\u5DE5\u7A0B\u5E08\uFF0C\u800C\u662F\u4ED6\u51B7\u6F20\u7684\u6001\u5EA6\uFF0C\u8D85\u7EA7\u9AD8\u6C34\u5E73\u7684\u7529\u9505\u80FD\u529B\uFF0C\u5F7B\u5F7B\u5E95\u5E95\u628A\u6211\u7ED9\u6253\u8D25\u4E86\uFF01</p><p>\u7ED9\u5927\u5BB6\u770B\u4E00\u4E0B\u6211\u4EEC\u7684\u7B2C\u4E00\u6CE2\u4EA4\u950B\u3002\u4ECE\u5728\u7EBF\u6C9F\u901A\u8F6C\u5DE5\u5355\u7684\u65F6\u5019\uFF0C\u4E3A\u4E86\u7ED9\u8FD9\u4F4D\u963F\u91CC\u4E91\u7684\u552E\u540E\u5DE5\u7A0B\u5E08\u52A0\u6CB9\u6253\u6C14\uFF0C\u6211\u8FD8\u7279\u610F\u51C6\u5907\u4E86\u4E00\u53E5\u201C\u8F9B\u82E6\u4E86\u201D\uFF0C\u5C31\u5DEE\u8DEA\u4E0B\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/aliyun-shuaiguo-gongchengshi-1.png" alt=""></p><p>\u7ED3\u679C\u7B49\u5230\u7684\u662F\u963F\u91CC\u4E91\u552E\u540E\u5DE5\u7A0B\u5E08\u7684\u4E00\u53E5\uFF1A\u201C\u6211\u6253\u5F00\u770B\u4E86\u4E00\u4E0B\uFF0C\u8FD9\u4E2A\u56FE\u7247\u4E0D\u662F\u60A8\u7ED9\u7684\u8FD9\u4E2A\u8D44\u6E90\u554A\u201D\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/aliyun-shuaiguo-gongchengshi-2.png" alt=""></p><p>\u6211\u5F53\u65F6\u5FC3\u91CC\u6697\u60F3\uFF0C\u597D\u5BB6\u4F19\uFF0C\u679C\u7136\u7529\u9505\u5C0F\u80FD\u624B\u554A\uFF01</p><p>\u7136\u540E\u6211\u5C31\u8010\u5FC3\u5730\u7ED9\u4ED6\u89E3\u91CA\uFF0CGitHub \u4F1A\u5BF9\u56FE\u7247\u8F6C\u94FE\uFF0C\u53E6\u5916\uFF0C\u7528 HTTP \u7684\u65F6\u5019\u662F\u53EF\u4EE5\u663E\u793A\u7684\uFF0C\u53EA\u6709 CDN \u542F\u7528\u4E86 HTTPS \u624D\u4E0D\u663E\u793A\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/aliyun-shuaiguo-gongchengshi-3.png" alt=""></p><p>\u7ED3\u679C\u4ED6\u56DE\u4E86\u4E00\u53E5\uFF0C\u201C\u8FD9\u4E2A\u6211\u4EEC\u786E\u8BA4\u4E0D\u4E86\u54C8\uFF0C\u8FD9\u4E2A\u94FE\u63A5\u6CA1\u6709\u8BF7\u6C42 CDN \u57DF\u540D\uFF0C\u4E0D\u663E\u793A\u4E5F\u4E0D\u662F CDN \u8FD4\u56DE\u7684\u201D\u3002</p><p>\u4ECE\u6211\u4EEC\u7684\u7B2C\u4E8C\u6CE2\u4EA4\u950B\u53EF\u4EE5\u770B\u5F97\u51FA\uFF0C\u8FD9\u4F4D\u963F\u91CC\u552E\u540E\u5DE5\u7A0B\u5E08\u7684\u7529\u9505\u5929\u8D4B\u5F00\u59CB\u5D2D\u9732\u5934\u89D2\u4E86\uFF0C\u524D\u540E\u7684\u903B\u8F91\u4E5F\u975E\u5E38\u7F1C\u5BC6\uFF0C\u4E0D\u5BB9\u7F6E\u7591\u3002</p><p>\u63A5\u7740\u6211\u53C8\u7ED9\u4ED6\u89E3\u91CA\uFF0C\u6211\u8BF4\u4F60\u770B\u770B\u8FD9\u4E2A\u56FE\u7247\u6807\u7B7E\u91CC\u8FD8\u6709\u4E00\u4E2A <code>data-canonical-src</code> \u5C5E\u6027\uFF0C\u5B83\u5C31\u6765\u81EA\u4F60\u4EEC\u963F\u91CC\u4E91\u7684 CDN \u554A\uFF0C\u53E6\u5916\uFF0C\u6211\u628A HTTPS \u6539\u6210 HTTP 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\u5C31\u53EF\u4EE5\u8BBF\u95EE\u4E86\uFF0C\u522B\u7684\u4EC0\u4E48\u90FD\u4E0D\u7528\u52A8\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/aliyun-shuaiguo-gongchengshi-4.png" alt=""></p><p>\u6211\u4EE5\u4E3A\uFF0C\u8FD9\u4F4D\u963F\u91CC\u552E\u540E\u5DE5\u7A0B\u5E08\u5728\u6536\u5230\u6211\u8FD9\u4E2A\u786E\u51FF\u7684\u8BC1\u636E\u540E\uFF0C\u4F1A\u7A0D\u5FAE\u7814\u7A76\u4E00\u756A\uFF0C\u7ED3\u679C\u6CA1\u60F3\u5230\uFF0C\u4ED6\u9A6C\u4E0A\u5C31\u5F00\u59CB\u6B63\u513F\u516B\u7ECF\u5730\u7529\u9505\u4E86\uFF0C\u201C<strong>\u8FD9\u4E2A\u6211\u4EEC\u4E5F\u786E\u8BA4\u4E0D\u4E86\uFF0C\u56E0\u4E3A\u8FD9\u4E2A\u7C7B\u4F3C\u4EE3\u7406\u8BF7\u6C42\u4E86\uFF0C\u62FF\u4E0D\u5230\u5B9E\u9645\u8BF7\u6C42 CDN \u7684\u8FD4\u56DE\u4FE1\u606F</strong>\u201D\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/aliyun-shuaiguo-gongchengshi-5.png" alt=""></p><p>\u597D\u5427\uFF0C\u6211\u88AB\u6253\u8D25\u4E86\uFF0C\u5F7B\u5F7B\u5E95\u5E95\u5730\u8D25\u4E86\uFF0C\u8D25\u7684\u4E00\u584C\u7CCA\u6D82\uFF01</p><p><strong>\u7EC6\u7EC6\u54C1\u4E00\u4E0B\uFF0C\u8FD9\u4F4D\u963F\u91CC\u552E\u540E\u5DE5\u7A0B\u5E08\u7ED9\u51FA\u7684\u7406\u7531\u7EDD\u58C1\u662F\u5929\u8863\u65E0\u7F1D\uFF0C\u6211\u6839\u672C\u5C31\u6CA1\u529E\u6CD5\u53CD\u9A73</strong>\uFF01\u8981\u602A\u6211\u53EA\u80FD\u602A\uFF0CGitHub\uFF01</p><ul><li>\u7B2C\u4E00\uFF0C\u4F60\u4E3A\u4EC0\u4E48\u8981\u8F6C\u94FE\u554A\uFF1F</li><li>\u7B2C\u4E8C\uFF0C\u4F60\u4E3A\u4EC0\u4E48\u80FD\u8F6C HTTP \u7684 CDN \u94FE\u63A5\uFF0C\u8F6C\u4E0D\u4E86 HTTPS \u7684\u5462\uFF1F</li><li>\u7B2C\u4E09\uFF0C\u4F60 HTTPS \u4E5F\u4E0D\u662F\u4E0D\u80FD\u8F6C\uFF0C\u76F4\u63A5\u7528 OSS \u7684 HTTPS \u94FE\u63A5\u4F60\u5C31\u80FD\u8F6C\uFF0C\u52A0\u4E86 CDN \u7684\u4F60\u5C31\u4E0D\u884C\uFF1F</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/aliyun-shuaiguo-gongchengshi-6.png" alt=""></p><p>\u4E4B\u524D\u7ED9\u5927\u5BB6\u63D0\u5230\u8FC7\uFF0C\u4E8C\u54E5\u7684\u5C0F\u7834\u7AD9\u300AJava \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF\u300B\u7684\u56FE\u5E8A\u662F\u7528 GitHub+jsDelivr \u505A\u7684\uFF0C\u514D\u8D39\u554A\uFF0C\u53EF\u4EE5\u767D\u5AD6\u554A\uFF0C\u6240\u4EE5\u6211\u89C9\u5F97\u7528\u8D77\u6765\u5F88\u723D\uFF01</p><p>\u4F46\u76F4\u5230\u6709\u4E00\u5929\uFF0C\u6709\u4E2A\u5C0F\u4F19\u4F34\u63D0\u4E86\u4E00\u4E2A issue\uFF0C\u8BF4 jsDelivr \u64A4\u51FA\u4E86\u56FD\u5185\u8282\u70B9\uFF0C\u5BFC\u81F4\u90E8\u5206\u56FE\u7247\u4E0D\u663E\u793A\u6216\u8005\u52A0\u8F7D\u7F13\u6162\uFF0C\u6211\u5C31\u5750\u7ACB\u4E0D\u5B89\u3001\u5BDD\u98DF\u96BE\u5B89\u4E86\uFF01</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/aliyun-shuaiguo-gongchengshi-7.png" alt=""></p><p>\u6BD5\u7ADF\u4E8C\u54E5\u53EF\u662F\u4E00\u540D\u8D1F\u8D23\u4EFB\u7684\u597D\u540C\u5FD7\u554A\uFF0C\u5FC5\u987B\u5F97\u89E3\u51B3\u8FD9\u4E2A\u56FE\u5E8A\u7684\u95EE\u9898\u3002\u4E8E\u662F\u6211\u5C31\u6298\u817E\u4E86\u4E24\u5929\u7684 <strong>OSS + CDN</strong>\uFF0C\u5C0F\u7834\u7AD9\u7684\u56FE\u7247\u662F\u80FD\u6B63\u5E38\u8BBF\u95EE\u4E86\uFF0C\u53EA\u662F\u6CA1\u60F3\u5230\uFF0C\u963F\u91CC\u4E91\u7684\u8FD9\u5957\u56FE\u5E8A\u7EC4\u5408\u5728 GitHub \u4E0A\u8FD9\u4E48\u201C\u4E0D\u9760\u8C31\u201D\u3002</p><p>\u771F\u7684\u662F\u94B1\u82B1\u4E86\uFF0C\u4E8B\u5374\u6CA1\u529E\u597D\u3002\u5BB3\uFF0C\u5148\u6765\u77A7\u77A7\u6211\u81EA\u5DF1\u6478\u7D22\u51FA\u6765\u7684\u6298\u4E2D\u65B9\u6848\u5427\u3002</p><p>1\uFF09HTTPS \u7684 CDN \u94FE\u63A5\u7EDF\u7EDF\u66FF\u6362\u4E3A HTTP \u7684\uFF0C\u81F3\u5C11\u80FD\u663E\u793A\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/aliyun-shuaiguo-gongchengshi-8.png" alt=""></p><p>2\uFF09\u5982\u679C HTTP \u7684\u4E5F\u663E\u793A\u6709\u95EE\u9898\uFF0C\u6709\u4E9B\u4F1A\u53EA\u663E\u793A\u4E00\u90E8\u5206\uFF08\u83AB\u540D\u5176\u5999\uFF09\uFF0C\u5C31\u6539\u6210 OSS \u7684\u94FE\u63A5\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/aliyun-shuaiguo-gongchengshi-9.png" alt=""></p><p>\u5148\u628A\u95EE\u9898\u89E3\u51B3\u4E86\u518D\u8BF4\u3002</p><p>\u5C0F\u4F19\u4F34\u4EEC\u6709\u6CA1\u6709\u66F4\u597D\u7684\u7684\u56FE\u5E8A\u89E3\u51B3\u65B9\u6848\u5462\uFF1F\u53EF\u4EE5\u5728\u8BC4\u8BBA\u533A/\u5F39\u5E55\u533A\u7ED9\u51FA\u81EA\u5DF1\u7684\u7B54\u6848\uFF0C\u6551\u6551\u4E8C\u54E5\u8FD9\u4E2A\u5B69\u5B50\u5427\uFF01\uFF01\uFF01\uFF01\uFF01\uFF01</p><p>\u597D\u4E86\uFF0C\u4ECA\u5929\u7684\u5206\u4EAB\u5C31\u5148\u5230\u8FD9\u5427\uFF0C\u5E0C\u671B\u5C0F\u4F19\u4F34\u4EEC\u80FD\u70B9\u70B9\u8D5E\uFF0C\u8F6C\u8F6C\u53D1\uFF0C\u597D\u8BA9\u963F\u91CC\u4E91\u5B98\u65B9\u770B\u5230\u8FD9\u4E2A\u95EE\u9898\uFF0C \u91CD\u89C6\u8FD9\u4E2A\u95EE\u9898\uFF0C\u5E76\u89E3\u51B3\u8FD9\u4E2A\u95EE\u9898\u3002</p>',30),n=[p];function g(r,s){return a(),t("div",null,n)}var h=e(i,[["render",g],["__file","aliyun-shuaiguo-gongchengshi.html.vue"]]);export{h as default};
diff --git a/dist/assets/annotation.html.b0fc1ba0.js b/dist/assets/annotation.html.3a9fcfe1.js
similarity index 99%
rename from dist/assets/annotation.html.b0fc1ba0.js
rename to dist/assets/annotation.html.3a9fcfe1.js
index 85f15550..faa0c25f 100644
--- a/dist/assets/annotation.html.b0fc1ba0.js
+++ b/dist/assets/annotation.html.3a9fcfe1.js
@@ -1,4 +1,4 @@
-import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e as p}from"./app.a0271b9c.js";const t={},e=p(`<h1 id="\u6DF1\u5165\u7406\u89E3java\u6CE8\u89E3" tabindex="-1"><a class="header-anchor" href="#\u6DF1\u5165\u7406\u89E3java\u6CE8\u89E3" aria-hidden="true">#</a> \u6DF1\u5165\u7406\u89E3Java\u6CE8\u89E3</h1><p>\u201C\u4E8C\u54E5\uFF0C\u8FD9\u8282\u8BB2\u6CE8\u89E3\u5417\uFF1F\u201D\u4E09\u59B9\u95EE\u3002</p><p>\u201C\u662F\u7684\u3002\u201D\u6211\u8BF4\uFF0C\u201C\u6CE8\u89E3\u662F Java \u4E2D\u975E\u5E38\u91CD\u8981\u7684\u4E00\u90E8\u5206\uFF0C\u4F46\u7ECF\u5E38\u88AB\u5FFD\u89C6\u4E5F\u662F\u771F\u7684\u3002\u4E4B\u6240\u4EE5\u8FD9\u4E48\u8BF4\u662F\u56E0\u4E3A\u6211\u4EEC\u66F4\u503E\u5411\u6210\u4E3A\u4E00\u540D\u6CE8\u89E3\u7684\u4F7F\u7528\u8005\u800C\u4E0D\u662F\u521B\u5EFA\u8005\u3002<code>@Override</code> \u6CE8\u89E3\u7528\u8FC7\u5427\uFF1F\u4F46\u4F60\u77E5\u9053\u600E\u4E48\u81EA\u5B9A\u4E49\u4E00\u4E2A\u6CE8\u89E3\u5417\uFF1F\u201D</p><p>\u4E09\u59B9\u6BEB\u4E0D\u72B9\u8C6B\u5730\u6447\u6447\u5934\uFF0C\u6446\u6446\u624B\uFF0C\u4E0D\u597D\u610F\u601D\u5730\u627F\u8BA4\u81EA\u5DF1\u7684\u786E\u6CA1\u6709\u81EA\u5B9A\u4E49\u8FC7\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/annotation/annotation-01.png" alt=""></p><p>\u201C\u597D\u5427\uFF0C\u54E5\u6765\u544A\u8BC9\u4F60\u5427\u3002\u201D</p><p>\u6CE8\u89E3\uFF08Annotation\uFF09\u662F\u5728 Java 1.5 \u65F6\u5F15\u5165\u7684\u6982\u5FF5\uFF0C\u540C class \u548C interface \u4E00\u6837\uFF0C\u4E5F\u5C5E\u4E8E\u4E00\u79CD\u7C7B\u578B\u3002\u6CE8\u89E3\u63D0\u4F9B\u4E86\u4E00\u7CFB\u5217\u6570\u636E\u7528\u6765\u88C5\u9970\u7A0B\u5E8F\u4EE3\u7801\uFF08\u7C7B\u3001\u65B9\u6CD5\u3001\u5B57\u6BB5\u7B49\uFF09\uFF0C\u4F46\u662F\u6CE8\u89E3\u5E76\u4E0D\u662F\u6240\u88C5\u9970\u4EE3\u7801\u7684\u4E00\u90E8\u5206\uFF0C\u5B83\u5BF9\u4EE3\u7801\u7684\u8FD0\u884C\u6548\u679C\u6CA1\u6709\u76F4\u63A5\u5F71\u54CD\uFF0C\u7531\u7F16\u8BD1\u5668\u51B3\u5B9A\u8BE5\u6267\u884C\u54EA\u4E9B\u64CD\u4F5C\u3002</p><p>\u6765\u770B\u4E00\u6BB5\u4EE3\u7801\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">AutowiredTest</span> <span class="token punctuation">{</span>
+import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e as p}from"./app.615e41d8.js";const t={},e=p(`<h1 id="\u6DF1\u5165\u7406\u89E3java\u6CE8\u89E3" tabindex="-1"><a class="header-anchor" href="#\u6DF1\u5165\u7406\u89E3java\u6CE8\u89E3" aria-hidden="true">#</a> \u6DF1\u5165\u7406\u89E3Java\u6CE8\u89E3</h1><p>\u201C\u4E8C\u54E5\uFF0C\u8FD9\u8282\u8BB2\u6CE8\u89E3\u5417\uFF1F\u201D\u4E09\u59B9\u95EE\u3002</p><p>\u201C\u662F\u7684\u3002\u201D\u6211\u8BF4\uFF0C\u201C\u6CE8\u89E3\u662F Java \u4E2D\u975E\u5E38\u91CD\u8981\u7684\u4E00\u90E8\u5206\uFF0C\u4F46\u7ECF\u5E38\u88AB\u5FFD\u89C6\u4E5F\u662F\u771F\u7684\u3002\u4E4B\u6240\u4EE5\u8FD9\u4E48\u8BF4\u662F\u56E0\u4E3A\u6211\u4EEC\u66F4\u503E\u5411\u6210\u4E3A\u4E00\u540D\u6CE8\u89E3\u7684\u4F7F\u7528\u8005\u800C\u4E0D\u662F\u521B\u5EFA\u8005\u3002<code>@Override</code> \u6CE8\u89E3\u7528\u8FC7\u5427\uFF1F\u4F46\u4F60\u77E5\u9053\u600E\u4E48\u81EA\u5B9A\u4E49\u4E00\u4E2A\u6CE8\u89E3\u5417\uFF1F\u201D</p><p>\u4E09\u59B9\u6BEB\u4E0D\u72B9\u8C6B\u5730\u6447\u6447\u5934\uFF0C\u6446\u6446\u624B\uFF0C\u4E0D\u597D\u610F\u601D\u5730\u627F\u8BA4\u81EA\u5DF1\u7684\u786E\u6CA1\u6709\u81EA\u5B9A\u4E49\u8FC7\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/annotation/annotation-01.png" alt=""></p><p>\u201C\u597D\u5427\uFF0C\u54E5\u6765\u544A\u8BC9\u4F60\u5427\u3002\u201D</p><p>\u6CE8\u89E3\uFF08Annotation\uFF09\u662F\u5728 Java 1.5 \u65F6\u5F15\u5165\u7684\u6982\u5FF5\uFF0C\u540C class \u548C interface \u4E00\u6837\uFF0C\u4E5F\u5C5E\u4E8E\u4E00\u79CD\u7C7B\u578B\u3002\u6CE8\u89E3\u63D0\u4F9B\u4E86\u4E00\u7CFB\u5217\u6570\u636E\u7528\u6765\u88C5\u9970\u7A0B\u5E8F\u4EE3\u7801\uFF08\u7C7B\u3001\u65B9\u6CD5\u3001\u5B57\u6BB5\u7B49\uFF09\uFF0C\u4F46\u662F\u6CE8\u89E3\u5E76\u4E0D\u662F\u6240\u88C5\u9970\u4EE3\u7801\u7684\u4E00\u90E8\u5206\uFF0C\u5B83\u5BF9\u4EE3\u7801\u7684\u8FD0\u884C\u6548\u679C\u6CA1\u6709\u76F4\u63A5\u5F71\u54CD\uFF0C\u7531\u7F16\u8BD1\u5668\u51B3\u5B9A\u8BE5\u6267\u884C\u54EA\u4E9B\u64CD\u4F5C\u3002</p><p>\u6765\u770B\u4E00\u6BB5\u4EE3\u7801\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">AutowiredTest</span> <span class="token punctuation">{</span>
     <span class="token annotation punctuation">@Autowired</span>
     <span class="token keyword">private</span> <span class="token class-name">String</span> name<span class="token punctuation">;</span>
 
diff --git a/dist/assets/aop-log.html.f3df7d62.js b/dist/assets/aop-log.html.ec10c829.js
similarity index 99%
rename from dist/assets/aop-log.html.f3df7d62.js
rename to dist/assets/aop-log.html.ec10c829.js
index d3e001ae..0c3aba40 100644
--- a/dist/assets/aop-log.html.f3df7d62.js
+++ b/dist/assets/aop-log.html.ec10c829.js
@@ -1,4 +1,4 @@
-import{_ as t}from"./plugin-vue_export-helper.21dcd24c.js";import{r as e,o as p,c as o,a as n,b as c,e as i,d as s}from"./app.a0271b9c.js";const l={},u=i(`<h1 id="spring-aop-\u626B\u76F2" tabindex="-1"><a class="header-anchor" href="#spring-aop-\u626B\u76F2" aria-hidden="true">#</a> Spring AOP \u626B\u76F2</h1><p>AOP \u662F Spring \u4F53\u7CFB\u4E2D\u975E\u5E38\u91CD\u8981\u7684\u4E24\u4E2A\u6982\u5FF5\u4E4B\u4E00\uFF08\u53E6\u5916\u4E00\u4E2A\u662F IoC\uFF09\uFF0C\u4ECA\u5929\u8FD9\u7BC7\u6587\u7AE0\u5C31\u6765\u5E26\u5927\u5BB6\u901A\u8FC7\u5B9E\u6218\u7684\u65B9\u5F0F\uFF0C\u5728\u7F16\u7A0B\u732B SpringBoot \u9879\u76EE\u4E2D\u4F7F\u7528 AOP \u6280\u672F\u4E3A controller \u5C42\u6DFB\u52A0\u4E00\u4E2A\u5207\u9762\u6765\u5B9E\u73B0\u63A5\u53E3\u8BBF\u95EE\u7684\u7EDF\u4E00\u65E5\u5FD7\u8BB0\u5F55\u3002</p><h3 id="\u4E00\u3001\u5173\u4E8E-aop" tabindex="-1"><a class="header-anchor" href="#\u4E00\u3001\u5173\u4E8E-aop" aria-hidden="true">#</a> \u4E00\u3001\u5173\u4E8E AOP</h3><p>AOP\uFF0C\u4E5F\u5C31\u662F Aspect-oriented Programming\uFF0C\u8BD1\u4E3A\u9762\u5411\u5207\u9762\u7F16\u7A0B\uFF0C\u662F\u8BA1\u7B97\u673A\u79D1\u5B66\u4E2D\u7684\u4E00\u4E2A\u8BBE\u8BA1\u601D\u60F3\uFF0C\u65E8\u5728\u901A\u8FC7\u5207\u9762\u6280\u672F\u4E3A\u4E1A\u52A1\u4E3B\u4F53\u589E\u52A0\u989D\u5916\u7684\u901A\u77E5\uFF08Advice\uFF09\uFF0C\u4ECE\u800C\u5BF9\u58F0\u660E\u4E3A\u201C\u5207\u70B9\u201D\uFF08Pointcut\uFF09\u7684\u4EE3\u7801\u5757\u8FDB\u884C\u7EDF\u4E00\u7BA1\u7406\u548C\u88C5\u9970\u3002</p><p>\u8FD9\u79CD\u601D\u60F3\u975E\u5E38\u9002\u7528\u4E8E\uFF0C\u5C06\u90A3\u4E9B\u4E0E\u6838\u5FC3\u4E1A\u52A1\u4E0D\u90A3\u4E48\u5BC6\u5207\u5173\u8054\u7684\u529F\u80FD\u6DFB\u52A0\u5230\u7A0B\u5E8F\u4E2D\uFF0C\u5C31\u597D\u6BD4\u6211\u4EEC\u4ECA\u5929\u7684\u4E3B\u9898\u2014\u2014\u65E5\u5FD7\u529F\u80FD\uFF0C\u5C31\u662F\u4E00\u4E2A\u5178\u578B\u7684\u6848\u4F8B\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/aop-log-1.png" alt=""></p><p>AOP \u662F\u5BF9\u9762\u5411\u5BF9\u8C61\u7F16\u7A0B\uFF08Object-oriented Programming\uFF0C\u4FD7\u79F0 OOP\uFF09\u7684\u4E00\u79CD\u8865\u5145\uFF0COOP \u7684\u6838\u5FC3\u5355\u5143\u662F\u7C7B\uFF08class\uFF09\uFF0C\u800C AOP \u7684\u6838\u5FC3\u5355\u5143\u662F\u5207\u9762\uFF08Aspect\uFF09\u3002\u5229\u7528 AOP \u53EF\u4EE5\u5BF9\u4E1A\u52A1\u903B\u8F91\u7684\u5404\u4E2A\u90E8\u5206\u8FDB\u884C\u9694\u79BB\uFF0C\u4ECE\u800C\u964D\u4F4E\u8026\u5408\u5EA6\uFF0C\u63D0\u9AD8\u7A0B\u5E8F\u7684\u53EF\u91CD\u7528\u6027\uFF0C\u540C\u65F6\u4E5F\u63D0\u9AD8\u4E86\u5F00\u53D1\u6548\u7387\u3002</p><p>\u6211\u4EEC\u53EF\u4EE5\u7B80\u5355\u7684\u628A AOP \u7406\u89E3\u4E3A\u8D2F\u7A7F\u4E8E\u65B9\u6CD5\u4E4B\u4E2D\uFF0C\u5728\u65B9\u6CD5\u6267\u884C\u524D\u3001\u6267\u884C\u65F6\u3001\u6267\u884C\u540E\u3001\u8FD4\u56DE\u503C\u540E\u3001\u5F02\u5E38\u540E\u8981\u6267\u884C\u7684\u64CD\u4F5C\u3002</p><h3 id="\u4E8C\u3001aop-\u7684\u76F8\u5173\u672F\u8BED" tabindex="-1"><a class="header-anchor" href="#\u4E8C\u3001aop-\u7684\u76F8\u5173\u672F\u8BED" aria-hidden="true">#</a> \u4E8C\u3001AOP \u7684\u76F8\u5173\u672F\u8BED</h3><p>\u6765\u770B\u4E0B\u9762\u8FD9\u5E45\u56FE\uFF0C\u8FD9\u662F\u4E00\u4E2A AOP \u7684\u6A21\u578B\u56FE\uFF0C\u5C31\u662F\u5728\u67D0\u4E9B\u65B9\u6CD5\u6267\u884C\u524D\u540E\u6267\u884C\u4E00\u4E9B\u901A\u7528\u7684\u64CD\u4F5C\uFF0C\u5E76\u4E14\u8FD9\u4E9B\u64CD\u4F5C\u4E0D\u4F1A\u5F71\u54CD\u7A0B\u5E8F\u672C\u8EAB\u7684\u8FD0\u884C\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/aop-log-2.png" alt=""> \u6211\u4EEC\u4E86\u89E3\u4E0B AOP \u6D89\u53CA\u5230\u7684 5 \u4E2A\u5173\u952E\u672F\u8BED\uFF1A</p><p><strong>1\uFF09\u6A2A\u5207\u5173\u6CE8\u70B9</strong>\uFF0C\u4ECE\u6BCF\u4E2A\u65B9\u6CD5\u4E2D\u62BD\u53D6\u51FA\u6765\u7684\u540C\u4E00\u7C7B\u975E\u6838\u5FC3\u4E1A\u52A1</p><p><strong>2\uFF09\u5207\u9762\uFF08Aspect\uFF09</strong>\uFF0C\u5BF9\u6A2A\u5207\u5173\u6CE8\u70B9\u8FDB\u884C\u5C01\u88C5\u7684\u7C7B\uFF0C\u6BCF\u4E2A\u5173\u6CE8\u70B9\u4F53\u73B0\u4E3A\u4E00\u4E2A\u901A\u77E5\u65B9\u6CD5\uFF1B\u901A\u5E38\u4F7F\u7528 @Aspect \u6CE8\u89E3\u6765\u5B9A\u4E49\u5207\u9762\u3002</p><p><strong>3\uFF09\u901A\u77E5\uFF08Advice\uFF09</strong>\uFF0C\u5207\u9762\u5FC5\u987B\u8981\u5B8C\u6210\u7684\u5404\u4E2A\u5177\u4F53\u5DE5\u4F5C\uFF0C\u6BD4\u5982\u6211\u4EEC\u7684\u65E5\u5FD7\u5207\u9762\u9700\u8981\u8BB0\u5F55\u63A5\u53E3\u8C03\u7528\u524D\u540E\u7684\u65F6\u957F\uFF0C\u5C31\u9700\u8981\u5728\u8C03\u7528\u63A5\u53E3\u524D\u540E\u8BB0\u5F55\u65F6\u95F4\uFF0C\u518D\u53D6\u5DEE\u503C\u3002\u901A\u77E5\u7684\u65B9\u5F0F\u6709\u4E94\u79CD\uFF1A</p><ul><li>@Before\uFF1A\u901A\u77E5\u65B9\u6CD5\u4F1A\u5728\u76EE\u6807\u65B9\u6CD5\u8C03\u7528\u4E4B\u524D\u6267\u884C</li><li>@After\uFF1A\u901A\u77E5\u65B9\u6CD5\u4F1A\u5728\u76EE\u6807\u65B9\u6CD5\u8C03\u7528\u540E\u6267\u884C</li><li>@AfterReturning\uFF1A\u901A\u77E5\u65B9\u6CD5\u4F1A\u5728\u76EE\u6807\u65B9\u6CD5\u8FD4\u56DE\u540E\u6267\u884C</li><li>@AfterThrowing\uFF1A\u901A\u77E5\u65B9\u6CD5\u4F1A\u5728\u76EE\u6807\u65B9\u6CD5\u629B\u51FA\u5F02\u5E38\u540E\u6267\u884C</li><li>@Around\uFF1A\u628A\u6574\u4E2A\u76EE\u6807\u65B9\u6CD5\u5305\u88F9\u8D77\u6765\uFF0C\u5728\u88AB\u8C03\u7528\u524D\u548C\u8C03\u7528\u4E4B\u540E\u5206\u522B\u6267\u884C\u901A\u77E5\u65B9\u6CD5</li></ul><p><strong>4\uFF09\u8FDE\u63A5\u70B9\uFF08JoinPoint\uFF09</strong>\uFF0C\u901A\u77E5\u5E94\u7528\u7684\u65F6\u673A\uFF0C\u6BD4\u5982\u63A5\u53E3\u65B9\u6CD5\u88AB\u8C03\u7528\u65F6\u5C31\u662F\u65E5\u5FD7\u5207\u9762\u7684\u8FDE\u63A5\u70B9\u3002</p><p><strong>5\uFF09\u5207\u70B9\uFF08Pointcut\uFF09</strong>\uFF0C\u901A\u77E5\u529F\u80FD\u88AB\u5E94\u7528\u7684\u8303\u56F4\uFF0C\u6BD4\u5982\u672C\u7BC7\u65E5\u5FD7\u5207\u9762\u7684\u5E94\u7528\u8303\u56F4\u662F\u6240\u6709 controller \u7684\u63A5\u53E3\u3002\u901A\u5E38\u4F7F\u7528 @Pointcut \u6CE8\u89E3\u6765\u5B9A\u4E49\u5207\u70B9\u8868\u8FBE\u5F0F\u3002</p><p>\u5207\u5165\u70B9\u8868\u8FBE\u5F0F\u7684\u8BED\u6CD5\u683C\u5F0F\u89C4\u8303\u5982\u4E0B\u6240\u793A\uFF1A</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>execution(modifiers-pattern? ret-type-pattern declaring-type-pattern?
+import{_ as t}from"./plugin-vue_export-helper.21dcd24c.js";import{r as e,o as p,c as o,a as n,b as c,e as i,d as s}from"./app.615e41d8.js";const l={},u=i(`<h1 id="spring-aop-\u626B\u76F2" tabindex="-1"><a class="header-anchor" href="#spring-aop-\u626B\u76F2" aria-hidden="true">#</a> Spring AOP \u626B\u76F2</h1><p>AOP \u662F Spring \u4F53\u7CFB\u4E2D\u975E\u5E38\u91CD\u8981\u7684\u4E24\u4E2A\u6982\u5FF5\u4E4B\u4E00\uFF08\u53E6\u5916\u4E00\u4E2A\u662F IoC\uFF09\uFF0C\u4ECA\u5929\u8FD9\u7BC7\u6587\u7AE0\u5C31\u6765\u5E26\u5927\u5BB6\u901A\u8FC7\u5B9E\u6218\u7684\u65B9\u5F0F\uFF0C\u5728\u7F16\u7A0B\u732B SpringBoot \u9879\u76EE\u4E2D\u4F7F\u7528 AOP \u6280\u672F\u4E3A controller \u5C42\u6DFB\u52A0\u4E00\u4E2A\u5207\u9762\u6765\u5B9E\u73B0\u63A5\u53E3\u8BBF\u95EE\u7684\u7EDF\u4E00\u65E5\u5FD7\u8BB0\u5F55\u3002</p><h3 id="\u4E00\u3001\u5173\u4E8E-aop" tabindex="-1"><a class="header-anchor" href="#\u4E00\u3001\u5173\u4E8E-aop" aria-hidden="true">#</a> \u4E00\u3001\u5173\u4E8E AOP</h3><p>AOP\uFF0C\u4E5F\u5C31\u662F Aspect-oriented Programming\uFF0C\u8BD1\u4E3A\u9762\u5411\u5207\u9762\u7F16\u7A0B\uFF0C\u662F\u8BA1\u7B97\u673A\u79D1\u5B66\u4E2D\u7684\u4E00\u4E2A\u8BBE\u8BA1\u601D\u60F3\uFF0C\u65E8\u5728\u901A\u8FC7\u5207\u9762\u6280\u672F\u4E3A\u4E1A\u52A1\u4E3B\u4F53\u589E\u52A0\u989D\u5916\u7684\u901A\u77E5\uFF08Advice\uFF09\uFF0C\u4ECE\u800C\u5BF9\u58F0\u660E\u4E3A\u201C\u5207\u70B9\u201D\uFF08Pointcut\uFF09\u7684\u4EE3\u7801\u5757\u8FDB\u884C\u7EDF\u4E00\u7BA1\u7406\u548C\u88C5\u9970\u3002</p><p>\u8FD9\u79CD\u601D\u60F3\u975E\u5E38\u9002\u7528\u4E8E\uFF0C\u5C06\u90A3\u4E9B\u4E0E\u6838\u5FC3\u4E1A\u52A1\u4E0D\u90A3\u4E48\u5BC6\u5207\u5173\u8054\u7684\u529F\u80FD\u6DFB\u52A0\u5230\u7A0B\u5E8F\u4E2D\uFF0C\u5C31\u597D\u6BD4\u6211\u4EEC\u4ECA\u5929\u7684\u4E3B\u9898\u2014\u2014\u65E5\u5FD7\u529F\u80FD\uFF0C\u5C31\u662F\u4E00\u4E2A\u5178\u578B\u7684\u6848\u4F8B\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/aop-log-1.png" alt=""></p><p>AOP \u662F\u5BF9\u9762\u5411\u5BF9\u8C61\u7F16\u7A0B\uFF08Object-oriented Programming\uFF0C\u4FD7\u79F0 OOP\uFF09\u7684\u4E00\u79CD\u8865\u5145\uFF0COOP \u7684\u6838\u5FC3\u5355\u5143\u662F\u7C7B\uFF08class\uFF09\uFF0C\u800C AOP \u7684\u6838\u5FC3\u5355\u5143\u662F\u5207\u9762\uFF08Aspect\uFF09\u3002\u5229\u7528 AOP \u53EF\u4EE5\u5BF9\u4E1A\u52A1\u903B\u8F91\u7684\u5404\u4E2A\u90E8\u5206\u8FDB\u884C\u9694\u79BB\uFF0C\u4ECE\u800C\u964D\u4F4E\u8026\u5408\u5EA6\uFF0C\u63D0\u9AD8\u7A0B\u5E8F\u7684\u53EF\u91CD\u7528\u6027\uFF0C\u540C\u65F6\u4E5F\u63D0\u9AD8\u4E86\u5F00\u53D1\u6548\u7387\u3002</p><p>\u6211\u4EEC\u53EF\u4EE5\u7B80\u5355\u7684\u628A AOP \u7406\u89E3\u4E3A\u8D2F\u7A7F\u4E8E\u65B9\u6CD5\u4E4B\u4E2D\uFF0C\u5728\u65B9\u6CD5\u6267\u884C\u524D\u3001\u6267\u884C\u65F6\u3001\u6267\u884C\u540E\u3001\u8FD4\u56DE\u503C\u540E\u3001\u5F02\u5E38\u540E\u8981\u6267\u884C\u7684\u64CD\u4F5C\u3002</p><h3 id="\u4E8C\u3001aop-\u7684\u76F8\u5173\u672F\u8BED" tabindex="-1"><a class="header-anchor" href="#\u4E8C\u3001aop-\u7684\u76F8\u5173\u672F\u8BED" aria-hidden="true">#</a> \u4E8C\u3001AOP \u7684\u76F8\u5173\u672F\u8BED</h3><p>\u6765\u770B\u4E0B\u9762\u8FD9\u5E45\u56FE\uFF0C\u8FD9\u662F\u4E00\u4E2A AOP \u7684\u6A21\u578B\u56FE\uFF0C\u5C31\u662F\u5728\u67D0\u4E9B\u65B9\u6CD5\u6267\u884C\u524D\u540E\u6267\u884C\u4E00\u4E9B\u901A\u7528\u7684\u64CD\u4F5C\uFF0C\u5E76\u4E14\u8FD9\u4E9B\u64CD\u4F5C\u4E0D\u4F1A\u5F71\u54CD\u7A0B\u5E8F\u672C\u8EAB\u7684\u8FD0\u884C\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/aop-log-2.png" alt=""> \u6211\u4EEC\u4E86\u89E3\u4E0B AOP \u6D89\u53CA\u5230\u7684 5 \u4E2A\u5173\u952E\u672F\u8BED\uFF1A</p><p><strong>1\uFF09\u6A2A\u5207\u5173\u6CE8\u70B9</strong>\uFF0C\u4ECE\u6BCF\u4E2A\u65B9\u6CD5\u4E2D\u62BD\u53D6\u51FA\u6765\u7684\u540C\u4E00\u7C7B\u975E\u6838\u5FC3\u4E1A\u52A1</p><p><strong>2\uFF09\u5207\u9762\uFF08Aspect\uFF09</strong>\uFF0C\u5BF9\u6A2A\u5207\u5173\u6CE8\u70B9\u8FDB\u884C\u5C01\u88C5\u7684\u7C7B\uFF0C\u6BCF\u4E2A\u5173\u6CE8\u70B9\u4F53\u73B0\u4E3A\u4E00\u4E2A\u901A\u77E5\u65B9\u6CD5\uFF1B\u901A\u5E38\u4F7F\u7528 @Aspect \u6CE8\u89E3\u6765\u5B9A\u4E49\u5207\u9762\u3002</p><p><strong>3\uFF09\u901A\u77E5\uFF08Advice\uFF09</strong>\uFF0C\u5207\u9762\u5FC5\u987B\u8981\u5B8C\u6210\u7684\u5404\u4E2A\u5177\u4F53\u5DE5\u4F5C\uFF0C\u6BD4\u5982\u6211\u4EEC\u7684\u65E5\u5FD7\u5207\u9762\u9700\u8981\u8BB0\u5F55\u63A5\u53E3\u8C03\u7528\u524D\u540E\u7684\u65F6\u957F\uFF0C\u5C31\u9700\u8981\u5728\u8C03\u7528\u63A5\u53E3\u524D\u540E\u8BB0\u5F55\u65F6\u95F4\uFF0C\u518D\u53D6\u5DEE\u503C\u3002\u901A\u77E5\u7684\u65B9\u5F0F\u6709\u4E94\u79CD\uFF1A</p><ul><li>@Before\uFF1A\u901A\u77E5\u65B9\u6CD5\u4F1A\u5728\u76EE\u6807\u65B9\u6CD5\u8C03\u7528\u4E4B\u524D\u6267\u884C</li><li>@After\uFF1A\u901A\u77E5\u65B9\u6CD5\u4F1A\u5728\u76EE\u6807\u65B9\u6CD5\u8C03\u7528\u540E\u6267\u884C</li><li>@AfterReturning\uFF1A\u901A\u77E5\u65B9\u6CD5\u4F1A\u5728\u76EE\u6807\u65B9\u6CD5\u8FD4\u56DE\u540E\u6267\u884C</li><li>@AfterThrowing\uFF1A\u901A\u77E5\u65B9\u6CD5\u4F1A\u5728\u76EE\u6807\u65B9\u6CD5\u629B\u51FA\u5F02\u5E38\u540E\u6267\u884C</li><li>@Around\uFF1A\u628A\u6574\u4E2A\u76EE\u6807\u65B9\u6CD5\u5305\u88F9\u8D77\u6765\uFF0C\u5728\u88AB\u8C03\u7528\u524D\u548C\u8C03\u7528\u4E4B\u540E\u5206\u522B\u6267\u884C\u901A\u77E5\u65B9\u6CD5</li></ul><p><strong>4\uFF09\u8FDE\u63A5\u70B9\uFF08JoinPoint\uFF09</strong>\uFF0C\u901A\u77E5\u5E94\u7528\u7684\u65F6\u673A\uFF0C\u6BD4\u5982\u63A5\u53E3\u65B9\u6CD5\u88AB\u8C03\u7528\u65F6\u5C31\u662F\u65E5\u5FD7\u5207\u9762\u7684\u8FDE\u63A5\u70B9\u3002</p><p><strong>5\uFF09\u5207\u70B9\uFF08Pointcut\uFF09</strong>\uFF0C\u901A\u77E5\u529F\u80FD\u88AB\u5E94\u7528\u7684\u8303\u56F4\uFF0C\u6BD4\u5982\u672C\u7BC7\u65E5\u5FD7\u5207\u9762\u7684\u5E94\u7528\u8303\u56F4\u662F\u6240\u6709 controller \u7684\u63A5\u53E3\u3002\u901A\u5E38\u4F7F\u7528 @Pointcut \u6CE8\u89E3\u6765\u5B9A\u4E49\u5207\u70B9\u8868\u8FBE\u5F0F\u3002</p><p>\u5207\u5165\u70B9\u8868\u8FBE\u5F0F\u7684\u8BED\u6CD5\u683C\u5F0F\u89C4\u8303\u5982\u4E0B\u6240\u793A\uFF1A</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>execution(modifiers-pattern? ret-type-pattern declaring-type-pattern?
 				name-pattern(param-pattern)
                 throws-pattern?)
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><ul><li><code>modifiers-pattern?</code> \u4E3A\u8BBF\u95EE\u6743\u9650\u4FEE\u9970\u7B26</li><li><code>ret-type-pattern</code> \u4E3A\u8FD4\u56DE\u7C7B\u578B\uFF0C\u901A\u5E38\u7528 <code>*</code> \u6765\u8868\u793A\u4EFB\u610F\u8FD4\u56DE\u7C7B\u578B</li><li><code>declaring-type-pattern?</code> \u4E3A\u5305\u540D</li><li><code>name-pattern</code> \u4E3A\u65B9\u6CD5\u540D\uFF0C\u53EF\u4EE5\u4F7F\u7528 <code>*</code> \u6765\u8868\u793A\u6240\u6709\uFF0C\u6216\u8005 <code>set*</code> \u6765\u8868\u793A\u6240\u6709\u4EE5 set \u5F00\u5934\u7684\u7C7B\u540D</li><li><code>param-pattern)</code> \u4E3A\u53C2\u6570\u7C7B\u578B\uFF0C\u591A\u4E2A\u53C2\u6570\u53EF\u4EE5\u7528 <code>,</code> \u9694\u5F00\uFF0C\u5404\u4E2A\u53C2\u4E0E\u4E5F\u53EF\u4EE5\u4F7F\u7528 <code>*</code> \u6765\u8868\u793A\u6240\u6709\u7C7B\u578B\u7684\u53C2\u6570\uFF0C\u8FD8\u53EF\u4EE5\u4F7F\u7528 <code>(..)</code> \u8868\u793A\u96F6\u4E2A\u6216\u8005\u4EFB\u610F\u53C2\u6570</li><li><code>throws-pattern?</code> \u4E3A\u5F02\u5E38\u7C7B\u578B</li><li><code>?</code> \u8868\u793A\u524D\u9762\u7684\u4E3A\u53EF\u9009\u9879</li></ul><p>\u4E3E\u4E2A\u4F8B\u5B50\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token annotation punctuation">@Pointcut</span><span class="token punctuation">(</span><span class="token string">&quot;execution(public * com.codingmore.controller.*.*(..))&quot;</span><span class="token punctuation">)</span>
diff --git a/dist/assets/api-wangguan.html.9f0edd64.js b/dist/assets/api-wangguan.html.ec8dd3f1.js
similarity index 99%
rename from dist/assets/api-wangguan.html.9f0edd64.js
rename to dist/assets/api-wangguan.html.ec8dd3f1.js
index 66126cee..4c8ff436 100644
--- a/dist/assets/api-wangguan.html.9f0edd64.js
+++ b/dist/assets/api-wangguan.html.ec8dd3f1.js
@@ -1 +1 @@
-import{_ as i}from"./plugin-vue_export-helper.21dcd24c.js";import{r as n,o,c as s,a as e,b as t,d as a,e as l}from"./app.a0271b9c.js";const g={},c=a("\u6574\u7406\uFF1A\u6C89\u9ED8\u738B\u4E8C\uFF0C\u6233"),p={href:"https://mp.weixin.qq.com/s/b2xf4GiJksBQqjHVpsh49Q",target:"_blank",rel:"noopener noreferrer"},d=a("\u8F6C\u8F7D\u94FE\u63A5"),h=a("\uFF0C\u4F5C\u8005\uFF1A\u697C\u4ED4\uFF0C\u6233"),b={href:"https://mp.weixin.qq.com/s/0Qupyl5eCyQGFEAIY6GxoQ",target:"_blank",rel:"noopener noreferrer"},u=a("\u539F\u6587\u94FE\u63A5"),f=a("\u3002"),m=l('<p>\u5FAE\u670D\u52A1\u8FD1\u51E0\u5E74\u975E\u5E38\u706B\uFF0C\u56F4\u7ED5\u5FAE\u670D\u52A1\u7684\u6280\u672F\u751F\u6001\u4E5F\u6BD4\u8F83\u591A\uFF0C\u6BD4\u5982\u5FAE\u670D\u52A1\u7F51\u5173\u3001Docker\u3001Kubernetes\u7B49\u3002</p><p>\u6211\u662F\u4E8E2019\u5E74\u5F00\u59CB\u63A5\u89E6\u5FAE\u670D\u52A1\u7F51\u5173\uFF0C\u5F53\u65F6\u548C\u516C\u53F8\u7684\u4E00\u4F4D\u540C\u4E8B\u4E00\u8D77\u5F00\u53D1\uFF0C\u7531\u4E8E\u6280\u672F\u80FD\u529B\u6709\u9650\uFF0C\u6211\u53EA\u8D1F\u8D23\u7F51\u5173\u540E\u53F0\uFF0C\u540E\u7EED\u5FAE\u670D\u52A1\u7F51\u5173\u7684\u8FED\u4EE3\uFF0C\u6211\u5176\u5B9E\u6CA1\u6709\u53C2\u4E0E\uFF0C\u4E0D\u8FC7\u540E\u6765\u62BD\u7A7A\u770B\u4E86\u5FAE\u670D\u52A1\u7F51\u5173\u524D\u53F0\u7684\u4EE3\u7801\uFF0C\u6240\u4EE5\u5BF9\u8FD9\u5957\u5FAE\u670D\u52A1\u7F51\u5173\u7684\u5B9E\u73B0\u539F\u7406\u7B97\u662F\u57FA\u672C\u638C\u63E1\u3002</p><p>\u6700\u8FD1\u5728\u5199\u6280\u672F\u6808\u76F8\u5173\u7684\u6587\u7AE0\uFF0C\u521A\u597D\u5199\u5230\u5FAE\u670D\u52A1\u7F51\u5173\uFF0C\u5C31\u628A\u4E4B\u524D\u5B66\u4E60\u7684\u77E5\u8BC6\u8FDB\u884C\u7B80\u5355\u603B\u7ED3\uFF0C\u540C\u65F6\u4E5F\u628A\u5E02\u9762\u4E0A\u5E38\u7528\u7684\u5FAE\u670D\u52A1\u7F51\u5173\u8FDB\u884C\u68B3\u7406\uFF0C\u4E00\u65B9\u9762\u4FBF\u4E8E\u540E\u7EED\u6280\u672F\u9009\u578B\uFF0C\u53E6\u4E00\u65B9\u9762\u4E5F\u7B97\u662F\u7ED9\u81EA\u5DF1\u4E00\u4E2A\u4EA4\u4EE3\u3002\u4E0B\u9762\u662F\u6587\u7AE0\u76EE\u5F55\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-f910e9f2-0374-4afb-aef0-3ea47c9b7f67.png" alt=""></p><h2 id="api\u7F51\u5173\u57FA\u7840" tabindex="-1"><a class="header-anchor" href="#api\u7F51\u5173\u57FA\u7840" aria-hidden="true">#</a> API\u7F51\u5173\u57FA\u7840</h2><h3 id="\u4EC0\u4E48\u662Fapi\u7F51\u5173" tabindex="-1"><a class="header-anchor" href="#\u4EC0\u4E48\u662Fapi\u7F51\u5173" aria-hidden="true">#</a> \u4EC0\u4E48\u662FAPI\u7F51\u5173</h3><p><strong>API\u7F51\u5173\u662F\u4E00\u4E2A\u670D\u52A1\u5668\uFF0C\u662F\u7CFB\u7EDF\u7684\u552F\u4E00\u5165\u53E3\u3002</strong> \u4ECE\u9762\u5411\u5BF9\u8C61\u8BBE\u8BA1\u7684\u89D2\u5EA6\u770B\uFF0C\u5B83\u4E0E\u5916\u89C2\u6A21\u5F0F\u7C7B\u4F3C\u3002</p><p>API\u7F51\u5173\u5C01\u88C5\u4E86\u7CFB\u7EDF\u5185\u90E8\u67B6\u6784\uFF0C\u4E3A\u6BCF\u4E2A\u5BA2\u6237\u7AEF\u63D0\u4F9B\u4E00\u4E2A\u5B9A\u5236\u7684API\u3002\u5B83\u53EF\u80FD\u8FD8\u5177\u6709\u5176\u5B83\u804C\u8D23\uFF0C\u5982\u8EAB\u4EFD\u9A8C\u8BC1\u3001\u76D1\u63A7\u3001\u8D1F\u8F7D\u5747\u8861\u3001\u7F13\u5B58\u3001\u534F\u8BAE\u8F6C\u6362\u3001\u9650\u6D41\u7194\u65AD\u3001\u9759\u6001\u54CD\u5E94\u5904\u7406\u3002</p><p><strong>API\u7F51\u5173\u65B9\u5F0F\u7684\u6838\u5FC3\u8981\u70B9\u662F\uFF0C\u6240\u6709\u7684\u5BA2\u6237\u7AEF\u548C\u6D88\u8D39\u7AEF\u90FD\u901A\u8FC7\u7EDF\u4E00\u7684\u7F51\u5173\u63A5\u5165\u5FAE\u670D\u52A1</strong>\uFF0C\u5728\u7F51\u5173\u5C42\u5904\u7406\u6240\u6709\u7684\u975E\u4E1A\u52A1\u529F\u80FD\u3002\u901A\u5E38\uFF0C\u7F51\u5173\u4E5F\u662F\u63D0\u4F9BREST/HTTP\u7684\u8BBF\u95EEAPI\u3002</p><h3 id="\u7F51\u5173\u7684\u4E3B\u8981\u529F\u80FD" tabindex="-1"><a class="header-anchor" href="#\u7F51\u5173\u7684\u4E3B\u8981\u529F\u80FD" aria-hidden="true">#</a> \u7F51\u5173\u7684\u4E3B\u8981\u529F\u80FD</h3><p>\u5FAE\u670D\u52A1\u7F51\u5173\u4F5C\u4E3A\u5FAE\u670D\u52A1\u540E\u7AEF\u670D\u52A1\u7684\u7EDF\u4E00\u5165\u53E3\uFF0C\u5B83\u53EF\u4EE5\u7EDF\u7B79\u7BA1\u7406\u540E\u7AEF\u670D\u52A1\uFF0C\u4E3B\u8981\u5206\u4E3A\u6570\u636E\u5E73\u9762\u548C\u63A7\u5236\u5E73\u9762\uFF1A</p><ul><li>\u6570\u636E\u5E73\u9762\u4E3B\u8981\u529F\u80FD\u662F\u63A5\u5165\u7528\u6237\u7684HTTP\u8BF7\u6C42\u548C\u5FAE\u670D\u52A1\u88AB\u62C6\u5206\u540E\u7684\u805A\u5408\u3002\u4F7F\u7528\u5FAE\u670D\u52A1\u7F51\u5173\u7EDF\u4E00\u5BF9\u5916\u66B4\u9732\u540E\u7AEF\u670D\u52A1\u7684API\u548C\u5951\u7EA6\uFF0C\u8DEF\u7531\u548C\u8FC7\u6EE4\u529F\u80FD\u6B63\u662F\u7F51\u5173\u7684\u6838\u5FC3\u80FD\u529B\u6A21\u5757\u3002\u53E6\u5916\uFF0C\u5FAE\u670D\u52A1\u7F51\u5173\u53EF\u4EE5\u5B9E\u73B0\u62E6\u622A\u673A\u5236\u548C\u4E13\u6CE8\u8DE8\u6A2A\u5207\u9762\u7684\u529F\u80FD\uFF0C\u5305\u62EC\u534F\u8BAE\u8F6C\u6362\u3001\u5B89\u5168\u8BA4\u8BC1\u3001\u7194\u65AD\u9650\u6D41\u3001\u7070\u5EA6\u53D1\u5E03\u3001\u65E5\u5FD7\u7BA1\u7406\u3001\u6D41\u91CF\u76D1\u63A7\u7B49\u3002</li><li>\u63A7\u5236\u5E73\u9762\u4E3B\u8981\u529F\u80FD\u662F\u5BF9\u540E\u7AEF\u670D\u52A1\u505A\u7EDF\u4E00\u7684\u7BA1\u63A7\u548C\u914D\u7F6E\u7BA1\u7406\u3002\u4F8B\u5982\uFF0C\u53EF\u4EE5\u63A7\u5236\u7F51\u5173\u7684\u5F39\u6027\u4F38\u7F29\uFF1B\u53EF\u4EE5\u7EDF\u4E00\u4E0B\u53D1\u914D\u7F6E\uFF1B\u53EF\u4EE5\u5BF9\u7F51\u5173\u670D\u52A1\u6DFB\u52A0\u6807\u7B7E\uFF1B\u53EF\u4EE5\u5728\u5FAE\u670D\u52A1\u7F51\u5173\u4E0A\u901A\u8FC7\u914D\u7F6ESwagger\u529F\u80FD\u7EDF\u4E00\u5C06\u540E\u7AEF\u670D\u52A1\u7684API\u5951\u7EA6\u66B4\u9732\u7ED9\u4F7F\u7528\u65B9\uFF0C\u5B8C\u6210\u6587\u6863\u670D\u52A1\uFF0C\u63D0\u9AD8\u5DE5\u4F5C\u6548\u7387\u548C\u964D\u4F4E\u6C9F\u901A\u6210\u672C\u3002</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-f6ea867d-ffdf-4da2-a89d-fccbe6326110.png" alt=""></p><ul><li><strong>\u8DEF\u7531\u529F\u80FD</strong>\uFF1A\u8DEF\u7531\u662F\u5FAE\u670D\u52A1\u7F51\u5173\u7684\u6838\u5FC3\u80FD\u529B\u3002\u901A\u8FC7\u8DEF\u7531\u529F\u80FD\u5FAE\u670D\u52A1\u7F51\u5173\u53EF\u4EE5\u5C06\u8BF7\u6C42\u8F6C\u53D1\u5230\u76EE\u6807\u5FAE\u670D\u52A1\u3002\u5728\u5FAE\u670D\u52A1\u67B6\u6784\u4E2D\uFF0C\u7F51\u5173\u53EF\u4EE5\u7ED3\u5408\u6CE8\u518C\u4E2D\u5FC3\u7684\u52A8\u6001\u670D\u52A1\u53D1\u73B0\uFF0C\u5B9E\u73B0\u5BF9\u540E\u7AEF\u670D\u52A1\u7684\u53D1\u73B0\uFF0C\u8C03\u7528\u65B9\u53EA\u9700\u8981\u77E5\u9053\u7F51\u5173\u5BF9\u5916\u66B4\u9732\u7684\u670D\u52A1API\u5C31\u53EF\u4EE5\u900F\u660E\u5730\u8BBF\u95EE\u540E\u7AEF\u5FAE\u670D\u52A1\u3002</li><li><strong>\u8D1F\u8F7D\u5747\u8861</strong>\uFF1AAPI\u7F51\u5173\u7ED3\u5408\u8D1F\u8F7D\u5747\u8861\u6280\u672F\uFF0C\u5229\u7528Eureka\u6216\u8005Consul\u7B49\u670D\u52A1\u53D1\u73B0\u5DE5\u5177\uFF0C\u901A\u8FC7\u8F6E\u8BE2\u3001\u6307\u5B9A\u6743\u91CD\u3001IP\u5730\u5740\u54C8\u5E0C\u7B49\u673A\u5236\u5B9E\u73B0\u4E0B\u6E38\u670D\u52A1\u7684\u8D1F\u8F7D\u5747\u8861\u3002</li><li><strong>\u7EDF\u4E00\u9274\u6743</strong>\uFF1A\u4E00\u822C\u800C\u8A00\uFF0C\u65E0\u8BBA\u5BF9\u5185\u7F51\u8FD8\u662F\u5916\u7F51\u7684\u63A5\u53E3\u90FD\u9700\u8981\u505A\u7528\u6237\u8EAB\u4EFD\u8BA4\u8BC1\uFF0C\u800C\u7528\u6237\u8BA4\u8BC1\u5728\u4E00\u4E9B\u89C4\u6A21\u8F83\u5927\u7684\u7CFB\u7EDF\u4E2D\u90FD\u4F1A\u91C7\u7528\u7EDF\u4E00\u7684\u5355\u70B9\u767B\u5F55\uFF08Single Sign On\uFF09\u7CFB\u7EDF\uFF0C\u5982\u679C\u6BCF\u4E2A\u5FAE\u670D\u52A1\u90FD\u8981\u5BF9\u63A5\u5355\u70B9\u767B\u5F55\u7CFB\u7EDF\uFF0C\u90A3\u4E48\u663E\u7136\u6BD4\u8F83\u6D6A\u8D39\u8D44\u6E90\u4E14\u5F00\u53D1\u6548\u7387\u4F4E\u3002API\u7F51\u5173\u662F\u7EDF\u4E00\u7BA1\u7406\u5B89\u5168\u6027\u7684\u7EDD\u4F73\u573A\u6240\uFF0C\u53EF\u4EE5\u5C06\u8BA4\u8BC1\u7684\u90E8\u5206\u62BD\u53D6\u5230\u7F51\u5173\u5C42\uFF0C\u5FAE\u670D\u52A1\u7CFB\u7EDF\u65E0\u987B\u5173\u6CE8\u8BA4\u8BC1\u7684\u903B\u8F91\uFF0C\u53EA\u5173\u6CE8\u81EA\u8EAB\u4E1A\u52A1\u5373\u53EF\u3002</li><li><strong>\u534F\u8BAE\u8F6C\u6362</strong>\uFF1AAPI\u7F51\u5173\u7684\u4E00\u5927\u4F5C\u7528\u5728\u4E8E\u6784\u5EFA\u5F02\u6784\u7CFB\u7EDF\uFF0CAPI\u7F51\u5173\u4F5C\u4E3A\u5355\u4E00\u5165\u53E3\uFF0C\u901A\u8FC7\u534F\u8BAE\u8F6C\u6362\u6574\u5408\u540E\u53F0\u57FA\u4E8EREST\u3001AMQP\u3001Dubbo\u7B49\u4E0D\u540C\u98CE\u683C\u548C\u5B9E\u73B0\u6280\u672F\u7684\u5FAE\u670D\u52A1\uFF0C\u9762\u5411Web Mobile\u3001\u5F00\u653E\u5E73\u53F0\u7B49\u7279\u5B9A\u5BA2\u6237\u7AEF\u63D0\u4F9B\u7EDF\u4E00\u670D\u52A1\u3002</li><li><strong>\u6307\u6807\u76D1\u63A7</strong>\uFF1A\u7F51\u5173\u53EF\u4EE5\u7EDF\u8BA1\u540E\u7AEF\u670D\u52A1\u7684\u8BF7\u6C42\u6B21\u6570\uFF0C\u5E76\u4E14\u53EF\u4EE5\u5B9E\u65F6\u5730\u66F4\u65B0\u5F53\u524D\u7684\u6D41\u91CF\u5065\u5EB7\u72B6\u6001\uFF0C\u53EF\u4EE5\u5BF9URL\u7C92\u5EA6\u7684\u670D\u52A1\u8FDB\u884C\u5EF6\u8FDF\u7EDF\u8BA1\uFF0C\u4E5F\u53EF\u4EE5\u4F7F\u7528Hystrix Dashboard\u67E5\u770B\u540E\u7AEF\u670D\u52A1\u7684\u6D41\u91CF\u72B6\u6001\u53CA\u662F\u5426\u6709\u7194\u65AD\u53D1\u751F\u3002</li><li><strong>\u9650\u6D41\u7194\u65AD</strong>\uFF1A\u5728\u67D0\u4E9B\u573A\u666F\u4E0B\u9700\u8981\u63A7\u5236\u5BA2\u6237\u7AEF\u7684\u8BBF\u95EE\u6B21\u6570\u548C\u8BBF\u95EE\u9891\u7387\uFF0C\u4E00\u4E9B\u9AD8\u5E76\u53D1\u7CFB\u7EDF\u6709\u65F6\u8FD8\u4F1A\u6709\u9650\u6D41\u7684\u9700\u6C42\u3002\u5728\u7F51\u5173\u4E0A\u53EF\u4EE5\u914D\u7F6E\u4E00\u4E2A\u9608\u503C\uFF0C\u5F53\u8BF7\u6C42\u6570\u8D85\u8FC7\u9608\u503C\u65F6\u5C31\u76F4\u63A5\u8FD4\u56DE\u9519\u8BEF\u800C\u4E0D\u7EE7\u7EED\u8BBF\u95EE\u540E\u53F0\u670D\u52A1\u3002\u5F53\u51FA\u73B0\u6D41\u91CF\u6D2A\u5CF0\u6216\u8005\u540E\u7AEF\u670D\u52A1\u51FA\u73B0\u5EF6\u8FDF\u6216\u6545\u969C\u65F6\uFF0C\u7F51\u5173\u80FD\u591F\u4E3B\u52A8\u8FDB\u884C\u7194\u65AD\uFF0C\u4FDD\u62A4\u540E\u7AEF\u670D\u52A1\uFF0C\u5E76\u4FDD\u6301\u524D\u7AEF\u7528\u6237\u4F53\u9A8C\u826F\u597D\u3002</li><li><strong>\u9ED1\u767D\u540D\u5355</strong>\uFF1A\u5FAE\u670D\u52A1\u7F51\u5173\u53EF\u4EE5\u4F7F\u7528\u7CFB\u7EDF\u9ED1\u540D\u5355\uFF0C\u8FC7\u6EE4HTTP\u8BF7\u6C42\u7279\u5F81\uFF0C\u62E6\u622A\u5F02\u5E38\u5BA2\u6237\u7AEF\u7684\u8BF7\u6C42\uFF0C\u4F8B\u5982DDoS\u653B\u51FB\u7B49\u4FB5\u8680\u5E26\u5BBD\u6216\u8D44\u6E90\u8FEB\u4F7F\u670D\u52A1\u4E2D\u65AD\u7B49\u884C\u4E3A\uFF0C\u53EF\u4EE5\u5728\u7F51\u5173\u5C42\u9762\u8FDB\u884C\u62E6\u622A\u8FC7\u6EE4\u3002\u6BD4\u8F83\u5E38\u89C1\u7684\u62E6\u622A\u7B56\u7565\u662F\u6839\u636EIP\u5730\u5740\u589E\u52A0\u9ED1\u540D\u5355\u3002\u5728\u5B58\u5728\u9274\u6743\u7BA1\u7406\u7684\u8DEF\u7531\u670D\u52A1\u4E2D\u53EF\u4EE5\u901A\u8FC7\u8BBE\u7F6E\u767D\u540D\u5355\u8DF3\u8FC7\u9274\u6743\u7BA1\u7406\u800C\u76F4\u63A5\u8BBF\u95EE\u540E\u7AEF\u670D\u52A1\u8D44\u6E90\u3002</li><li><strong>\u7070\u5EA6\u53D1\u5E03</strong>\uFF1A\u5FAE\u670D\u52A1\u7F51\u5173\u53EF\u4EE5\u6839\u636EHTTP\u8BF7\u6C42\u4E2D\u7684\u7279\u6B8A\u6807\u8BB0\u548C\u540E\u7AEF\u670D\u52A1\u5217\u8868\u5143\u6570\u636E\u6807\u8BC6\u8FDB\u884C\u6D41\u91CF\u63A7\u5236\uFF0C\u5B9E\u73B0\u5728\u7528\u6237\u65E0\u611F\u77E5\u7684\u60C5\u51B5\u4E0B\u5B8C\u6210\u7070\u5EA6\u53D1\u5E03\u3002</li><li><strong>\u6D41\u91CF\u67D3\u8272</strong>\uFF1A\u548C\u7070\u5EA6\u53D1\u5E03\u7684\u539F\u7406\u76F8\u4F3C\uFF0C\u7F51\u5173\u53EF\u4EE5\u6839\u636EHTTP\u8BF7\u6C42\u7684Host\u3001Head\u3001Agent\u7B49\u6807\u8BC6\u5BF9\u8BF7\u6C42\u8FDB\u884C\u67D3\u8272\uFF0C\u6709\u4E86\u7F51\u5173\u7684\u6D41\u91CF\u67D3\u8272\u529F\u80FD\uFF0C\u6211\u4EEC\u53EF\u4EE5\u5BF9\u670D\u52A1\u540E\u7EED\u7684\u8C03\u7528\u94FE\u8DEF\u8FDB\u884C\u8DDF\u8E2A\uFF0C\u5BF9\u670D\u52A1\u5EF6\u8FDF\u53CA\u670D\u52A1\u8FD0\u884C\u72B6\u51B5\u8FDB\u884C\u8FDB\u4E00\u6B65\u7684\u94FE\u8DEF\u5206\u6790\u3002</li><li><strong>\u6587\u6863\u4E2D\u5FC3</strong>\uFF1A\u7F51\u5173\u7ED3\u5408Swagger\uFF0C\u53EF\u4EE5\u5C06\u540E\u7AEF\u7684\u5FAE\u670D\u52A1\u66B4\u9732\u7ED9\u7F51\u5173\uFF0C\u7F51\u5173\u4F5C\u4E3A\u7EDF\u4E00\u7684\u5165\u53E3\u7ED9\u63A5\u53E3\u7684\u4F7F\u7528\u65B9\u63D0\u4F9B\u67E5\u770B\u540E\u7AEF\u670D\u52A1\u7684API\u89C4\u8303\uFF0C\u4E0D\u9700\u8981\u77E5\u9053\u6BCF\u4E00\u4E2A\u540E\u7AEF\u5FAE\u670D\u52A1\u7684Swagger\u5730\u5740\uFF0C\u8FD9\u6837\u7F51\u5173\u8D77\u5230\u4E86\u5BF9\u540E\u7AEFAPI\u805A\u5408\u7684\u6548\u679C\u3002</li><li><strong>\u65E5\u5FD7\u5BA1\u8BA1</strong>\uFF1A\u5FAE\u670D\u52A1\u7F51\u5173\u53EF\u4EE5\u4F5C\u4E3A\u7EDF\u4E00\u7684\u65E5\u5FD7\u8BB0\u5F55\u548C\u6536\u96C6\u5668\uFF0C\u5BF9\u670D\u52A1URL\u7C92\u5EA6\u7684\u65E5\u5FD7\u8BF7\u6C42\u4FE1\u606F\u548C\u54CD\u5E94\u4FE1\u606F\u8FDB\u884C\u62E6\u622A\u3002</li></ul><h2 id="api\u7F51\u5173\u9009\u578B" tabindex="-1"><a class="header-anchor" href="#api\u7F51\u5173\u9009\u578B" aria-hidden="true">#</a> API\u7F51\u5173\u9009\u578B</h2><h3 id="\u5E38\u7528api\u7F51\u5173" tabindex="-1"><a class="header-anchor" href="#\u5E38\u7528api\u7F51\u5173" aria-hidden="true">#</a> \u5E38\u7528API\u7F51\u5173</h3><p>\u5148\u7B80\u5355\u770B\u4E00\u4E0B\u5E02\u9762\u4E0A\u5E38\u7528\u7684API\u7F51\u5173\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-ddaf1b1e-60b2-4cff-bab2-2b7b32f07f72.png" alt=""></p><h4 id="nginx" tabindex="-1"><a class="header-anchor" href="#nginx" aria-hidden="true">#</a> Nginx</h4><p>Nginx\u662F\u4E00\u4E2A\u9AD8\u6027\u80FD\u7684HTTP\u548C\u53CD\u5411\u4EE3\u7406\u670D\u52A1\u5668\u3002<strong>Nginx\u4E00\u65B9\u9762\u53EF\u4EE5\u505A\u53CD\u5411\u4EE3\u7406\uFF0C\u53E6\u5916\u4E00\u65B9\u9762\u53EF\u4EE5\u505A\u9759\u6001\u8D44\u6E90\u670D\u52A1\u5668\uFF0C\u63A5\u53E3\u4F7F\u7528Lua\u52A8\u6001\u8BED\u8A00\u53EF\u4EE5\u5B8C\u6210\u7075\u6D3B\u7684\u5B9A\u5236\u529F\u80FD\u3002</strong></p><p>Nginx \u5728\u542F\u52A8\u540E\uFF0C\u4F1A\u6709\u4E00\u4E2A Master \u8FDB\u7A0B\u548C\u591A\u4E2A Worker \u8FDB\u7A0B\uFF0CMaster \u8FDB\u7A0B\u548C Worker \u8FDB\u7A0B\u4E4B\u95F4\u662F\u901A\u8FC7\u8FDB\u7A0B\u95F4\u901A\u4FE1\u8FDB\u884C\u4EA4\u4E92\u7684\uFF0C\u5982\u56FE\u6240\u793A\u3002Worker \u5DE5\u4F5C\u8FDB\u7A0B\u7684\u963B\u585E\u70B9\u662F\u5728\u50CF select()\u3001epoll_wait() \u7B49\u8FD9\u6837\u7684 I/O \u591A\u8DEF\u590D\u7528\u51FD\u6570\u8C03\u7528\u5904\uFF0C\u4EE5\u7B49\u5F85\u53D1\u751F\u6570\u636E\u53EF\u8BFB / \u5199\u4E8B\u4EF6\u3002Nginx \u91C7\u7528\u4E86\u5F02\u6B65\u975E\u963B\u585E\u7684\u65B9\u5F0F\u6765\u5904\u7406\u8BF7\u6C42\uFF0C\u4E5F\u5C31\u662F\u8BF4\uFF0CNginx \u662F\u53EF\u4EE5\u540C\u65F6\u5904\u7406\u6210\u5343\u4E0A\u4E07\u4E2A\u8BF7\u6C42\u7684\u3002</p><h4 id="zuul" tabindex="-1"><a class="header-anchor" href="#zuul" aria-hidden="true">#</a> Zuul</h4><p>Zuul \u662F Netflix \u5F00\u6E90\u7684\u4E00\u4E2AAPI\u7F51\u5173\u7EC4\u4EF6\uFF0C\u5B83\u53EF\u4EE5\u548C Eureka\u3001Ribbon\u3001Hystrix \u7B49\u7EC4\u4EF6\u914D\u5408\u4F7F\u7528\u3002\u793E\u533A\u6D3B\u8DC3\uFF0C\u878D\u5408\u4E8E SpringCloud \u5B8C\u6574\u751F\u6001\uFF0C\u662F\u6784\u5EFA\u5FAE\u670D\u52A1\u4F53\u7CFB\u524D\u7F6E\u7F51\u5173\u670D\u52A1\u7684\u6700\u4F73\u9009\u578B\u4E4B\u4E00\u3002</p><p>Zuul \u7684\u6838\u5FC3\u662F\u4E00\u7CFB\u5217\u7684\u8FC7\u6EE4\u5668\uFF0C\u8FD9\u4E9B\u8FC7\u6EE4\u5668\u53EF\u4EE5\u5B8C\u6210\u4EE5\u4E0B\u529F\u80FD\uFF1A</p><ul><li><strong>\u7EDF\u4E00\u9274\u6743 + \u52A8\u6001\u8DEF\u7531 + \u8D1F\u8F7D\u5747\u8861 + \u538B\u529B\u6D4B\u8BD5</strong></li><li><strong>\u5BA1\u67E5\u4E0E\u76D1\u63A7</strong>\uFF1A\u4E0E\u8FB9\u7F18\u4F4D\u7F6E\u8FFD\u8E2A\u6709\u610F\u4E49\u7684\u6570\u636E\u548C\u7EDF\u8BA1\u7ED3\u679C\uFF0C\u4ECE\u800C\u5E26\u6765\u7CBE\u786E\u7684\u751F\u4EA7\u89C6\u56FE\u3002</li><li><strong>\u591A\u533A\u57DF\u5F39\u6027</strong>\uFF1A\u8DE8\u8D8A AWS Region \u8FDB\u884C\u8BF7\u6C42\u8DEF\u7531\uFF0C\u65E8\u5728\u5B9E\u73B0 ELB\uFF08Elastic Load Balancing\uFF0C\u5F39\u6027\u8D1F\u8F7D\u5747\u8861\uFF09\u4F7F\u7528\u7684\u591A\u6837\u5316\uFF0C\u4EE5\u53CA\u8BA9\u7CFB\u7EDF\u7684\u8FB9\u7F18\u66F4\u8D34\u8FD1\u7CFB\u7EDF\u7684\u4F7F\u7528\u8005\u3002</li></ul><p>Zuul \u76EE\u524D\u6709\u4E24\u4E2A\u5927\u7684\u7248\u672C\uFF1A<strong>Zuul1 \u548C Zuul2</strong></p><p>Zuul1 \u662F\u57FA\u4E8E Servlet \u6846\u67B6\u6784\u5EFA\uFF0C\u5982\u56FE\u6240\u793A\uFF0C\u91C7\u7528\u7684\u662F\u963B\u585E\u548C\u591A\u7EBF\u7A0B\u65B9\u5F0F\uFF0C\u5373\u4E00\u4E2A\u7EBF\u7A0B\u5904\u7406\u4E00\u6B21\u8FDE\u63A5\u8BF7\u6C42\uFF0C\u8FD9\u79CD\u65B9\u5F0F\u5728\u5185\u90E8\u5EF6\u8FDF\u4E25\u91CD\u3001\u8BBE\u5907\u6545\u969C\u8F83\u591A\u60C5\u51B5\u4E0B\u4F1A\u5F15\u8D77\u5B58\u6D3B\u7684\u8FDE\u63A5\u589E\u591A\u548C\u7EBF\u7A0B\u589E\u52A0\u7684\u60C5\u51B5\u53D1\u751F\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-93bef98d-7d71-48d1-943a-b8ede72432c8.png" alt=""></p><p>Netflix \u53D1\u5E03\u7684 Zuul2 \u6709\u91CD\u5927\u7684\u66F4\u65B0\uFF0C\u5B83\u8FD0\u884C\u5728\u5F02\u6B65\u548C\u65E0\u963B\u585E\u6846\u67B6\u4E0A\uFF0C\u6BCF\u4E2A CPU \u6838\u4E00\u4E2A\u7EBF\u7A0B\uFF0C\u5904\u7406\u6240\u6709\u7684\u8BF7\u6C42\u548C\u54CD\u5E94\uFF0C\u8BF7\u6C42\u548C\u54CD\u5E94\u7684\u751F\u547D\u5468\u671F\u662F\u901A\u8FC7\u4E8B\u4EF6\u548C\u56DE\u8C03\u6765\u5904\u7406\u7684\uFF0C\u8FD9\u79CD\u65B9\u5F0F\u51CF\u5C11\u4E86\u7EBF\u7A0B\u6570\u91CF\uFF0C\u56E0\u6B64\u5F00\u9500\u8F83\u5C0F\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-90dfae10-7cbd-4099-a5df-ea09a1435bc0.png" alt=""></p><h4 id="spring-cloud-getway" tabindex="-1"><a class="header-anchor" href="#spring-cloud-getway" aria-hidden="true">#</a> Spring Cloud GetWay</h4><p>Spring Cloud Gateway \u662FSpring Cloud\u7684\u4E00\u4E2A\u5168\u65B0\u7684API\u7F51\u5173\u9879\u76EE\uFF0C\u76EE\u7684\u662F\u4E3A\u4E86\u66FF\u6362\u6389Zuul1\uFF0C\u5B83\u57FA\u4E8ESpring5.0 + SpringBoot2.0 + WebFlux\uFF08\u57FA\u4E8E\u2FBC\u6027\u80FD\u7684Reactor\u6A21\u5F0F\u54CD\u5E94\u5F0F\u901A\u4FE1\u6846\u67B6Netty\uFF0C\u5F02\u6B65\u2FAE\u963B\u585E\u6A21\u578B\uFF09\u7B49\u6280\u672F\u5F00\u53D1\uFF0C\u6027\u80FD\u2FBC\u4E8EZuul\uFF0C\u5B98\u2F45\u6D4B\u8BD5\uFF0C<strong>Spring Cloud GateWay\u662FZuul\u76841.6\u500D</strong>\uFF0C\u65E8\u5728\u4E3A\u5FAE\u670D\u52A1\u67B6\u6784\u63D0\u4F9B\u2F00\u79CD\u7B80\u5355\u6709\u6548\u7684\u7EDF\u2F00\u7684API\u8DEF\u7531\u7BA1\u7406\u2F45\u5F0F\u3002</p><p>Spring Cloud Gateway\u53EF\u4EE5\u4E0ESpring Cloud Discovery Client\uFF08\u5982Eureka\uFF09\u3001Ribbon\u3001Hystrix\u7B49\u7EC4\u4EF6\u914D\u5408\u4F7F\u7528\uFF0C<strong>\u5B9E\u73B0\u8DEF\u7531\u8F6C\u53D1\u3001\u8D1F\u8F7D\u5747\u8861\u3001\u7194\u65AD\u3001\u9274\u6743\u3001\u8DEF\u5F84\u91CD\u5199\u3001\u2F47\u5FD7\u76D1\u63A7\u7B49\uFF0C\u5E76\u4E14Gateway\u8FD8\u5185\u7F6E\u4E86\u9650\u6D41\u8FC7\u6EE4\u5668\uFF0C\u5B9E\u73B0\u4E86\u9650\u6D41\u7684\u529F\u80FD\u3002</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-71c6dfa6-dcf3-43ab-98bf-34d7ef588f02.png" alt=""></p><h4 id="kong" tabindex="-1"><a class="header-anchor" href="#kong" aria-hidden="true">#</a> Kong</h4><p>Kong\u662F\u4E00\u6B3E\u57FA\u4E8EOpenResty\uFF08Nginx + Lua\u6A21\u5757\uFF09\u7F16\u5199\u7684\u9AD8\u53EF\u7528\u3001\u6613\u6269\u5C55\u7684\uFF0C\u7531Mashape\u516C\u53F8\u5F00\u6E90\u7684API Gateway\u9879\u76EE\u3002<strong>Kong\u662F\u57FA\u4E8ENGINX\u548CApache Cassandra\u6216PostgreSQL\u6784\u5EFA\u7684</strong>\uFF0C\u80FD\u63D0\u4F9B\u6613\u4E8E\u4F7F\u7528\u7684RESTful API\u6765\u64CD\u4F5C\u548C\u914D\u7F6EAPI\u7BA1\u7406\u7CFB\u7EDF\uFF0C\u6240\u4EE5\u5B83\u53EF\u4EE5\u6C34\u5E73\u6269\u5C55\u591A\u4E2AKong\u670D\u52A1\u5668\uFF0C\u901A\u8FC7\u524D\u7F6E\u7684\u8D1F\u8F7D\u5747\u8861\u914D\u7F6E\u628A\u8BF7\u6C42\u5747\u5300\u5730\u5206\u53D1\u5230\u5404\u4E2AServer\uFF0C\u6765\u5E94\u5BF9\u5927\u6279\u91CF\u7684\u7F51\u7EDC\u8BF7\u6C42\u3002 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-e2113ab8-0fc2-4df5-91be-60154e557cc0.png" alt=""></p><p>Kong\u4E3B\u8981\u6709\u4E09\u4E2A\u7EC4\u4EF6\uFF1A</p><ul><li>Kong Server \uFF1A\u57FA\u4E8ENginx\u7684\u670D\u52A1\u5668\uFF0C\u7528\u6765\u63A5\u6536API\u8BF7\u6C42\u3002</li><li>Apache Cassandra/PostgreSQL \uFF1A\u7528\u6765\u5B58\u50A8\u64CD\u4F5C\u6570\u636E\u3002</li><li>Kong dashboard\uFF1A\u5B98\u65B9\u63A8\u8350UI\u7BA1\u7406\u5DE5\u5177\uFF0C\u4E5F\u53EF\u4EE5\u4F7F\u7528 restfull \u65B9\u5F0F\u7BA1\u7406admin api\u3002</li></ul><p>Kong\u91C7\u7528\u63D2\u4EF6\u673A\u5236\u8FDB\u884C\u529F\u80FD\u5B9A\u5236\uFF0C\u63D2\u4EF6\u96C6\uFF08\u53EF\u4EE5\u662F0\u6216N\u4E2A\uFF09\u5728API\u8BF7\u6C42\u54CD\u5E94\u5FAA\u73AF\u7684\u751F\u547D\u5468\u671F\u4E2D\u88AB\u6267\u884C\u3002\u63D2\u4EF6\u4F7F\u7528Lua\u7F16\u5199\uFF0C\u76EE\u524D\u5DF2\u6709\u51E0\u4E2A\u57FA\u7840\u529F\u80FD\uFF1A<strong>HTTP\u57FA\u672C\u8BA4\u8BC1\u3001\u5BC6\u94A5\u8BA4\u8BC1\u3001CORS\uFF08Cross-Origin Resource Sharing\uFF0C\u8DE8\u57DF\u8D44\u6E90\u5171\u4EAB\uFF09\u3001TCP\u3001UDP\u3001\u6587\u4EF6\u65E5\u5FD7\u3001API\u8BF7\u6C42\u9650\u6D41\u3001\u8BF7\u6C42\u8F6C\u53D1\u4EE5\u53CANginx\u76D1\u63A7\u3002</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-c6c7c5e3-214b-472e-b998-8adc820aa922.png" alt=""></p><p>Kong\u7F51\u5173\u5177\u6709\u4EE5\u4E0B\u7684\u7279\u6027\uFF1A</p><ul><li>\u53EF\u6269\u5C55\u6027: \u901A\u8FC7\u7B80\u5355\u5730\u6DFB\u52A0\u66F4\u591A\u7684\u670D\u52A1\u5668\uFF0C\u53EF\u4EE5\u8F7B\u677E\u5730\u8FDB\u884C\u6A2A\u5411\u6269\u5C55\uFF0C\u8FD9\u610F\u5473\u7740\u60A8\u7684\u5E73\u53F0\u53EF\u4EE5\u5728\u4E00\u4E2A\u8F83\u4F4E\u8D1F\u8F7D\u7684\u60C5\u51B5\u4E0B\u5904\u7406\u4EFB\u4F55\u8BF7\u6C42\uFF1B</li><li>\u6A21\u5757\u5316: \u53EF\u4EE5\u901A\u8FC7\u6DFB\u52A0\u65B0\u7684\u63D2\u4EF6\u8FDB\u884C\u6269\u5C55\uFF0C\u8FD9\u4E9B\u63D2\u4EF6\u53EF\u4EE5\u901A\u8FC7RESTful Admin API\u8F7B\u677E\u914D\u7F6E\uFF1B</li><li>\u5728\u4EFB\u4F55\u57FA\u7840\u67B6\u6784\u4E0A\u8FD0\u884C: Kong\u7F51\u5173\u53EF\u4EE5\u5728\u4EFB\u4F55\u5730\u65B9\u90FD\u80FD\u8FD0\u884C\u3002\u60A8\u53EF\u4EE5\u5728\u4E91\u6216\u5185\u90E8\u7F51\u7EDC\u73AF\u5883\u4E2D\u90E8\u7F72Kong\uFF0C\u5305\u62EC\u5355\u4E2A\u6216\u591A\u4E2A\u6570\u636E\u4E2D\u5FC3\u8BBE\u7F6E\uFF0C\u4EE5\u53CApublic\uFF0Cprivate \u6216invite-only APIs\u3002</li></ul><h4 id="traefik" tabindex="-1"><a class="header-anchor" href="#traefik" aria-hidden="true">#</a> Traefik</h4><p>Tr\xE6f\u026Ak \u662F\u4E00\u4E2A\u4E3A\u4E86\u8BA9\u90E8\u7F72\u5FAE\u670D\u52A1\u66F4\u52A0\u4FBF\u6377\u800C\u8BDE\u751F\u7684\u73B0\u4EE3HTTP\u53CD\u5411\u4EE3\u7406\u3001\u8D1F\u8F7D\u5747\u8861\u5DE5\u5177\u3002 \u5B83\u652F\u6301\u591A\u79CD\u540E\u53F0 (Docker, Swarm, Kubernetes, Marathon, Mesos, Consul, Etcd, Zookeeper, BoltDB, Rest API, file\u2026) \u6765\u81EA\u52A8\u5316\u3001\u52A8\u6001\u7684\u5E94\u7528\u5B83\u7684\u914D\u7F6E\u6587\u4EF6\u8BBE\u7F6E\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-553541d9-870d-45a8-8026-a1274d809e5e.png" alt=""></p><p>\u91CD\u8981\u7279\u6027\uFF1A</p><ul><li>\u5B83\u975E\u5E38\u5FEB\uFF0C\u65E0\u9700\u5B89\u88C5\u5176\u4ED6\u4F9D\u8D56\uFF0C\u901A\u8FC7Go\u8BED\u8A00\u7F16\u5199\u7684\u5355\u4E00\u53EF\u6267\u884C\u6587\u4EF6\uFF1B</li><li><strong>\u591A\u79CD\u540E\u53F0\u652F\u6301\uFF1ADocker, Swarm, Kubernetes, Marathon, Mesos, Consul, Etcd\uFF1B</strong></li><li>\u652F\u6301\u652F\u6301Rest API\u3001Websocket\u3001HTTP/2\u3001Docker\u955C\u50CF\uFF1B</li><li>\u76D1\u542C\u540E\u53F0\u53D8\u5316\u8FDB\u800C\u81EA\u52A8\u5316\u5E94\u7528\u65B0\u7684\u914D\u7F6E\u6587\u4EF6\u8BBE\u7F6E\uFF1B</li><li>\u914D\u7F6E\u6587\u4EF6\u70ED\u66F4\u65B0\uFF0C\u65E0\u9700\u91CD\u542F\u8FDB\u7A0B\uFF1B</li><li>\u540E\u7AEF\u65AD\u8DEF\u5668\u3001\u8D1F\u8F7D\u5747\u8861\u3001\u5BB9\u9519\u673A\u5236\uFF1B</li><li>\u6E05\u723D\u7684\u524D\u7AEF\u9875\u9762\uFF0C\u53EF\u76D1\u63A7\u670D\u52A1\u6307\u6807\u3002</li></ul><blockquote><p>\u5173\u4E8ETraefik\u7684\u66F4\u591A\u5185\u5BB9\uFF0C\u53EF\u4EE5\u67E5\u770B\u5B98\u7F51\uFF1Ahttps://traefik.cn/</p></blockquote><h3 id="api\u7F51\u5173\u5BF9\u6BD4" tabindex="-1"><a class="header-anchor" href="#api\u7F51\u5173\u5BF9\u6BD4" aria-hidden="true">#</a> API\u7F51\u5173\u5BF9\u6BD4</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-ad51c257-fe2d-435d-a043-92a70957756e.png" alt=""><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-ae017d9d-db0d-4322-805e-5230189561f5.png" alt=""><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-daf82b5b-011d-488d-9d60-c1221bd5b0ec.png" alt=""></p><p>\u4E0A\u9762\u662F\u7F51\u5173\u5BF9\u6BD4\u622A\u56FE\uFF0C\u5077\u4E2A\u61D2\uFF0C\u5927\u5BB6\u4E3B\u8981\u5173\u6CE8Kong\u3001Traefik\u548CZuul\u5373\u53EF\uFF1A</p><ul><li>\u4ECE<strong>\u5F00\u6E90\u793E\u533A\u6D3B\u8DC3\u5EA6</strong>\u6765\u770B\uFF0C\u65E0\u7591\u662FKong\u548CTraefik\u8F83\u597D\uFF1B</li><li>\u4ECE<strong>\u6210\u719F\u5EA6</strong>\u6765\u770B\uFF0C\u8F83\u597D\u7684\u662FKong\u3001Tyk\u3001Traefik\uFF1B</li><li>\u4ECE<strong>\u6027\u80FD</strong>\u6765\u770B\uFF0CKong\u8981\u6BD4\u5176\u4ED6\u51E0\u4E2A\u9886\u5148\u4E00\u4E9B\uFF1B</li><li>\u4ECE<strong>\u67B6\u6784\u4F18\u52BF</strong>\u7684\u6269\u5C55\u6027\u6765\u770B\uFF0CKong\u3001Tyk\u6709\u4E30\u5BCC\u7684\u63D2\u4EF6\uFF0CAmbassador\u4E5F\u6709\u63D2\u4EF6\u4F46\u4E0D\u591A\uFF0C\u800CZuul\u662F\u5B8C\u5168\u9700\u8981\u81EA\u7814\uFF0C\u4F46Zuul\u7531\u4E8E\u4E0ESpring Cloud\u6DF1\u5EA6\u96C6\u6210\uFF0C\u4F7F\u7528\u5EA6\u4E5F\u5F88\u9AD8\uFF0C\u8FD1\u5E74\u6765Istio\u670D\u52A1\u7F51\u683C\u7684\u6D41\u884C\uFF0CAmbassador\u56E0\u4E3A\u80FD\u591F\u548CIstio\u65E0\u7F1D\u96C6\u6210\u4E5F\u662F\u76F8\u5F53\u5927\u7684\u4F18\u52BF\u3002</li></ul><p>\u4E0B\u9762\u662F\u5176\u5B83\u7F51\u53CB\u7684\u601D\u8003\u7ED3\u8BBA\uFF0C\u53EF\u4F9B\u53C2\u8003\uFF1A</p><ul><li><strong>\u6027\u80FD</strong>\uFF1ANginx+Lua\u5F62\u5F0F\u5FC5\u7136\u662F\u9AD8\u4E8EJava\u8BED\u8A00\u5B9E\u73B0\u7684\u7F51\u5173\u7684\uFF0CJava\u6280\u672F\u6808\u91CC\u9762Zuul1.0\u662F\u57FA\u4E8EServlet\u5B9E\u73B0\u7684\uFF0C\u5269\u4E0B\u90FD\u662F\u57FA\u4E8Ewebflux\u5B9E\u73B0\uFF0C\u6027\u80FD\u662F\u9AD8\u4E8E\u57FA\u4E8EServlet\u5B9E\u73B0\u7684\u3002<strong>\u5728\u6027\u80FD\u65B9\u9762\u6211\u89C9\u5F97\u9009\u62E9\u7F51\u5173\u53EF\u80FD\u4E0D\u7B97\u90A3\u4E48\u91CD\u8981\uFF0C\u591A\u52A0\u51E0\u53F0\u673A\u5668\u5C31\u53EF\u4EE5\u641E\u5B9A\u3002</strong></li><li><strong>\u53EF\u7EF4\u62A4\u6027\u548C\u6269\u5C55\u6027</strong>\uFF1ANginx+Lua\u8FD9\u4E2A\u7EC4\u5408\u638C\u63E1\u7684\u4EBA\u4E0D\u7B97\u591A\uFF0C\u5982\u679C\u56E2\u961F\u6709\u5927\u795E\uFF0C\u5927\u4F6C\u4EEC\u5C31\u968F\u610F\u4E86\uFF0C\u5F53\u6CA1\u770B\u5230\u8FD9\u6BB5\u8BDD\uFF0C\u5BF9\u4E8E\u4E00\u822C\u56E2\u961F\u6765\u8BF4\u7684\u8BDD\uFF0C\u9009\u62E9\u81EA\u5DF1\u56E2\u961F\u64C5\u957F\u7684\u8BED\u8A00\u66F4\u91CD\u8981\u3002Java\u6280\u672F\u6808\u4E0B\u76843\u79CD\u7F51\u5173\uFF0C\u5BF9\u4E8EZuul\u548CSpring Cloud Getway\u9700\u8981\u6216\u591A\u6216\u5C11\u8981\u641E\u4E00\u4E9B\u96C6\u6210\u548C\u914D\u7F6E\u9875\u9762\u6765\u7EF4\u62A4\uFF0C\u4F46\u662F\u5BF9\u4E8ESoul\u6211\u5C31\u65E0\u8111\u770B\u770B\u6587\u7AE0\uFF0C\u9700\u8981\u54EA\u4E2A\u642C\u54EA\u4E2A\u597D\u4E86\uFF0C\u5C24\u5176\u662F\u53EF\u4EE5\u65E0\u8111\u5BF9\u63A5Dubbo\u7F8E\u6ECB\u6ECB\uFF0C\u6B64\u5916Soul2.0\u4EE5\u540E\u7248\u672C\u53EF\u4EE5\u6446\u8131ZK\uFF0C\u5728\u6211\u5FC3\u91CC\u518D\u65E0\u8BDF\u75C5\uFF0C\u6211\u5C31\u559C\u6B22\u65E0\u8111\u64CD\u4F5C\u3002</li><li><strong>\u9AD8\u53EF\u7528</strong>\uFF1A\u5BF9\u4E8E\u7F51\u5173\u9AD8\u53EF\u7528\u57FA\u672C\u90FD\u662F\u7EDF\u4E00\u7684\u7B56\u7565\u90FD\u662F\u91C7\u7528\u591A\u673A\u5668\u90E8\u7F72\u7684\u65B9\u5F0F\uFF0C\u524D\u9762\u6302\u4E00\u4E2A\u8D1F\u8F7D\uFF0C\u5BF9\u4E8E\u800C\u5916\u9700\u8981\u7528\u7684\u4E00\u4E9B\u7EC4\u4EF6\u5927\u5BB6\u6CE8\u610F\u4E00\u4E0B\u3002</li></ul><h2 id="\u57FA\u4E8Etraefik\u81EA\u7814\u7684\u5FAE\u670D\u52A1\u7F51\u5173" tabindex="-1"><a class="header-anchor" href="#\u57FA\u4E8Etraefik\u81EA\u7814\u7684\u5FAE\u670D\u52A1\u7F51\u5173" aria-hidden="true">#</a> \u57FA\u4E8ETraefik\u81EA\u7814\u7684\u5FAE\u670D\u52A1\u7F51\u5173</h2><p>\u8FD9\u4E2A\u662F\u6211\u53F8\u81EA\u7814\u7684\u5FAE\u670D\u52A1\u7F51\u5173\uFF0C\u57FA\u4E8ETraefik\u8FDB\u884C\u5F00\u53D1\uFF0C\u4E0B\u9762\u4ECE\u6280\u672F\u9009\u578B\u3001\u7F51\u5173\u6846\u67B6\u3001\u7F51\u5173\u540E\u53F0\u3001\u534F\u8BAE\u8F6C\u6362\u8FDB\u884C\u8BB2\u89E3\uFF0C\u7EDD\u5BF9\u5E72\u8D27\uFF01</p><h3 id="\u6280\u672F\u6808\u9009\u578B" tabindex="-1"><a class="header-anchor" href="#\u6280\u672F\u6808\u9009\u578B" aria-hidden="true">#</a> \u6280\u672F\u6808\u9009\u578B</h3><ul><li><strong>Traefik</strong>\uFF1A\u4E00\u6B3E\u5F00\u6E90\u7684\u53CD\u5411\u4EE3\u7406\u4E0E\u8D1F\u8F7D\u5747\u8861\u5DE5\u5177\uFF0C\u5B83\u6700\u5927\u7684\u4F18\u70B9\u662F\u80FD\u591F\u4E0E\u5E38\u89C1\u7684\u5FAE\u670D\u52A1\u7CFB\u7EDF\u76F4\u63A5\u6574\u5408\uFF0C\u53EF\u4EE5\u5B9E\u73B0\u81EA\u52A8\u5316\u52A8\u6001\u914D\u7F6E\u3002traefik\u8F83\u4E3A\u8F7B\u91CF\uFF0C\u975E\u5E38\u6613\u4E8E\u4F7F\u7528\u548C\u8BBE\u7F6E\uFF0C\u6027\u80FD\u6BD4\u8F83\u597D\uFF0C\u5DF2\u5728\u5168\u7403\u8303\u56F4\u5185\u7528\u4E8E\u751F\u4EA7\u73AF\u5883\u3002</li><li><strong>Etcd</strong>\uFF1A\u4E00\u4E2AGo\u8A00\u7F16\u5199\u7684\u5206\u5E03\u5F0F\u3001\u9AD8\u53EF\u7528\u7684\u4E00\u81F4\u6027\u952E\u503C\u5B58\u50A8\u7CFB\u7EDF\uFF0C\u7528\u4E8E\u63D0\u4F9B\u53EF\u9760\u7684\u5206\u5E03\u5F0F\u952E\u503C\u5B58\u50A8\u3001\u914D\u7F6E\u5171\u4EAB\u548C\u670D\u52A1\u53D1\u73B0\u7B49\u529F\u80FD\u3002</li><li><strong>Go</strong>\uFF1A\u5E76\u53D1\u80FD\u529B\u5F3A\uFF0C\u6027\u80FD\u5AB2\u7F8EC\uFF0C\u5904\u7406\u80FD\u529B\u662FPHP\u76844\u500D\uFF0C\u6548\u7387\u9AD8\uFF0C\u8BED\u6CD5\u7B80\u5355\uFF0C\u6613\u4E0A\u624B\uFF0C\u5F00\u53D1\u6548\u7387\u63A5\u8FD1PHP\u3002</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-3567ace8-c7f3-4b5d-bf0f-9bb85fa8c439.png" alt=""></p><h3 id="\u7F51\u5173\u6846\u67B6" tabindex="-1"><a class="header-anchor" href="#\u7F51\u5173\u6846\u67B6" aria-hidden="true">#</a> \u7F51\u5173\u6846\u67B6</h3><p>\u6574\u4E2A\u7F51\u5173\u6846\u67B6\u5206\u4E3A3\u5757\uFF1A</p><ul><li><strong>\u7F51\u5173\u540E\u53F0</strong>\uFF08hal-fe\u548Chal-admin\uFF09\uFF1A\u7528\u4E8E\u5E94\u7528\u3001\u670D\u52A1\u548C\u63D2\u4EF6\u7684\u914D\u7F6E\uFF0C\u7136\u540E\u5C06\u914D\u7F6E\u4FE1\u606F\u53D1\u5E03\u5230ETCD\uFF1B</li><li><strong>Traefik</strong>\uFF1A\u8BFB\u53D6ETCD\u914D\u7F6E\uFF0C\u6839\u636E\u914D\u7F6E\u4FE1\u606F\u5BF9\u8BF7\u6C42\u8FDB\u884C\u8DEF\u7531\u5206\u53D1\uFF0C\u5982\u679C\u9700\u8981\u9274\u6743\uFF0C\u4F1A\u76F4\u63A5\u901A\u8FC7hal-agent\u6A21\u5757\u8FDB\u884C\u7EDF\u4E00\u9274\u6743\u3002\u9274\u6743\u5B8C\u6BD5\u540E\uFF0C\u5982\u679C\u662FHttp\u8BF7\u6C42\uFF0C\u76F4\u63A5\u6253\u5230\u4E0B\u6E38\u670D\u52A1\uFF0C\u5982\u679C\u662FGrpc\u548CThrift\u534F\u8BAE\uFF0C\u4F1A\u901A\u8FC7hal-proxy\u6A21\u5757\u8FDB\u884C\u534F\u8BAE\u8F6C\u6362\u3002</li><li><strong>\u534F\u8BAE\u8F6C\u6362\u6A21\u5757</strong>\uFF1A\u8BFB\u53D6ETCD\u914D\u7F6E\uFF0C\u5BF9Traefik\u5206\u53D1\u8FC7\u6765\u7684\u8BF7\u6C42\uFF0C\u8FDB\u884CGrpc\u548CThrift\u534F\u8BAE\u8F6C\u6362\uFF0C\u5E76\u901A\u8FC7\u670D\u52A1\u53D1\u73B0\u673A\u5236\uFF0C\u83B7\u53D6\u670D\u52A1\u4E0B\u6E38\u673A\u5668\uFF0C\u5E76\u901A\u8FC7\u8D1F\u8F7D\u5747\u8861\uFF0C\u5C06\u8F6C\u6362\u540E\u7684\u6570\u636E\u6253\u5230\u4E0B\u6E38\u670D\u52A1\u673A\u5668\u3002</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-45943e5f-2cca-45ff-9fb0-908e3cf7c990.png" alt=""></p><h3 id="\u7F51\u5173\u540E\u53F0" tabindex="-1"><a class="header-anchor" href="#\u7F51\u5173\u540E\u53F0" aria-hidden="true">#</a> \u7F51\u5173\u540E\u53F0</h3><p>\u4E3B\u8981\u75313\u5927\u6A21\u5757\u7EC4\u6210\uFF1A</p><ul><li><strong>\u5E94\u7528</strong>\uFF1A\u4E3B\u8981\u5305\u62EC\u5E94\u7528\u540D\u3001\u57DF\u540D\u3001\u8DEF\u5F84\u524D\u7F00\u3001\u6240\u5C5E\u7EC4\u3001\u72B6\u6001\u7B49\uFF0C\u6BD4\u5982\u5370\u5EA6\u6D77\u5916\u5546\u57CE\u3001\u5370\u5EA6\u793E\u533A\uFF1B</li><li><strong>\u670D\u52A1</strong>\uFF1A\u4E3B\u8981\u5305\u62EC\u670D\u52A1\u540D\u3001\u6CE8\u518C\u65B9\u5F0F\u3001\u534F\u8BAE\u7C7B\u578B\u3001\u6240\u5C5E\u7EC4\u3001\u72B6\u6001\u7B49\uFF0C\u6BD4\u5982\u8BC4\u8BBA\u670D\u52A1\u3001\u5730\u5740\u670D\u52A1\u3001\u641C\u7D22\u670D\u52A1\u3002</li><li><strong>\u63D2\u4EF6</strong>\uFF1A\u4E3B\u8981\u5305\u62EC\u63D2\u4EF6\u540D\u79F0\u3001\u63D2\u4EF6\u7C7B\u578B\u3001\u63D2\u4EF6\u5C5E\u6027\u914D\u7F6E\u7B49\uFF0C\u6BD4\u5982\u8DEF\u5F84\u524D\u7F00\u66FF\u6362\u63D2\u4EF6\u3001\u9274\u6743\u63D2\u4EF6\u3002</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-0b16b390-77b7-4fba-8529-7be31ba6335b.png" alt=""></p><p><strong>\u4E00\u4E2A\u5E94\u7528\u53EA\u80FD\u7ED1\u5B9A\u4E00\u4E2A\u670D\u52A1\uFF0C\u4F46\u662F\u53EF\u4EE5\u7ED1\u5B9A\u591A\u4E2A\u63D2\u4EF6\u3002</strong> \u901A\u8FC7\u540E\u53F0\u5B8C\u6210\u7F51\u5173\u914D\u7F6E\u540E\uFF0C\u5C06\u8FD9\u4E9B\u914D\u7F6E\u4FE1\u606F\u751F\u6210Config\u6587\u4EF6\uFF0C\u53D1\u5E03\u5230ETCD\u4E2D\uFF0CConfig\u6587\u4EF6\u9700\u8981\u9075\u5FAA\u4E25\u683C\u7684\u6570\u636E\u683C\u5F0F\uFF0C\u6BD4\u5982Traefix\u914D\u7F6E\u9700\u8981\u9075\u5FAA\u5B98\u65B9\u7684\u6587\u4EF6\u914D\u7F6E\u683C\u5F0F\uFF0C\u624D\u80FD\u88ABTraefik\u8BC6\u522B\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-299f8c95-d6a3-49d8-946d-5efed32faa29.png" alt=""></p><h3 id="\u534F\u8BAE\u8F6C\u6362\u6A21\u5757" tabindex="-1"><a class="header-anchor" href="#\u534F\u8BAE\u8F6C\u6362\u6A21\u5757" aria-hidden="true">#</a> \u534F\u8BAE\u8F6C\u6362\u6A21\u5757</h3><p>hal-proxy\u6A21\u5757\u662F\u6574\u4E2A\u5FAE\u670D\u52A1\u7F51\u5173\u6700\u590D\u6742\uFF0C\u4E5F\u662F\u6280\u672F\u542B\u91CF\u6700\u9AD8\u7684\u6A21\u5757\uFF0C\u6240\u4EE5\u7ED9\u5927\u5BB6\u8BE6\u7EC6\u8BB2\u89E3\u4E00\u4E0B\u3002</p><h4 id="\u95EE\u9898\u5F15\u5165" tabindex="-1"><a class="header-anchor" href="#\u95EE\u9898\u5F15\u5165" aria-hidden="true">#</a> \u95EE\u9898\u5F15\u5165</h4><p>\u5728\u8BB2\u8FD9\u4E2A\u6A21\u5757\u524D\uFF0C\u6211\u4EEC\u5148\u770B\u4E0B\u9762\u51E0\u4E2A\u95EE\u9898\uFF1A</p><ul><li>\u5F53\u8BF7\u6C42\u4ECE\u4E0A\u6E38\u7684trafik\u8FC7\u6765\u65F6\uFF0C\u9700\u8981\u77E5\u9053\u8BBF\u95EE\u4E0B\u6E38\u7684\u673A\u5668IP\u548C\u7AEF\u53E3\uFF0C\u624D\u80FD\u5C06\u8BF7\u6C42\u53D1\u9001\u7ED9\u4E0B\u6E38\uFF0C\u8FD9\u4E9B\u673A\u5668\u5982\u4F55\u83B7\u53D6\u5462\uFF1F</li><li>\u6709\u4E86\u673A\u5668\u540E\uFF0C\u6211\u4EEC\u9700\u8981\u548C\u4E0B\u6E38\u673A\u5668\u5EFA\u7ACB\u8FDE\u63A5\uFF0C\u5982\u679C\u8FDE\u63A5\u7528\u4E00\u6B21\u5C31\u76F4\u63A5\u91CA\u653E\uFF0C\u80AF\u5B9A\u5BF9\u670D\u52A1\u4F1A\u9020\u6210\u5F88\u5927\u7684\u538B\u529B\uFF0C\u8FD9\u5C31\u9700\u8981\u5F15\u5165Client\u7F13\u5B58\u6C60\uFF0C\u90A3\u8FD9\u4E2AClient\u7F13\u5B58\u6C60\u6211\u4EEC\u53C8\u8BE5\u5982\u4F55\u5B9E\u73B0\u5462\uFF1F</li><li>\u6700\u540E\u5C31\u662F\u9700\u8981\u5BF9\u534F\u8BAE\u8FDB\u884C\u8F6C\u6362\uFF0C\u56E0\u4E3A\u4E0D\u540C\u7684\u4E0B\u6E38\u670D\u52A1\uFF0C\u652F\u6301\u7684\u534F\u8BAE\u7C7B\u578B\u662F\u4E0D\u4E00\u6837\u7684\uFF0C\u8FD9\u4E2A\u7F51\u5173\u53C8\u662F\u5982\u4F55\u52A8\u6001\u652F\u6301\u7684\u5462\uFF1F</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-c2672067-0b21-41ba-807d-f59e0baf5b99.png" alt=""></p><h4 id="\u5B9E\u73B0\u539F\u7406" tabindex="-1"><a class="header-anchor" href="#\u5B9E\u73B0\u539F\u7406" aria-hidden="true">#</a> \u5B9E\u73B0\u539F\u7406</h4><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-e7f9c956-cdf2-4238-aeb3-372c61c1532f.png" alt=""></p><p>\u6211\u4EEC\u8FD8\u662F\u5148\u770B\u4E00\u4E0Bhal-proxy\u5185\u90E8\u6709\u54EA\u4E9B\u6A21\u5757\uFF0C\u9996\u5148\u662FResolver\u6A21\u5757\uFF0C\u8FD9\u4E2A\u6A21\u5757\u7684\u662F\u4EC0\u4E48\u4F5C\u7528\u5462\uFF1F\u8FD9\u91CC\u6211\u7B80\u5355\u4ECB\u7ECD\u4E00\u4E0B\uFF0C\u76EE\u524D\u516C\u53F8\u5185\u90E8\u901A\u8FC7\u670D\u52A1\u83B7\u53D6\u5230\u673A\u5668\u5217\u8868\u7684\u65B9\u5F0F\u6709\u591A\u79CD\uFF0C\u6BD4\u5982MIS\u5E73\u53F0\u3001\u670D\u52A1\u6811\u7B49\uFF0C\u4E5F\u5C31\u662F\u6709\u7684\u662F\u901A\u8FC7\u5E73\u53F0\u914D\u7F6E\u7684\uFF0C\u6709\u7684\u662F\u76F4\u63A5\u6302\u5728\u670D\u52A1\u6811\u4E0B\uFF0C\u65E0\u8BBA\u54EA\u79CD\u65B9\u5F0F\uFF0C\u6211\u4EEC\u90FD\u901A\u8FC7\u670D\u52A1\u540D\uFF0C\u901A\u8FC7\u4E00\u5B9A\u7684\u65B9\u5F0F\uFF0C\u627E\u5230\u8BE5\u670D\u52A1\u4E0B\u9762\u6240\u6709\u7684\u4E3B\u673A\u3002</p><p><strong>\u6240\u4EE5Resolver\u6A21\u5757\u7684\u4F5C\u7528\uFF0C\u5176\u5B9E\u5C31\u662F\u901A\u8FC7\u670D\u52A1\u540D\uFF0C\u627E\u5230\u8BE5\u670D\u52A1\u4E0B\u7684\u6240\u6709\u673A\u5668\u7684IP\u548C\u670D\u52A1\u7AEF\u53E3\uFF0C\u7136\u540E\u6301\u4E45\u5316\u5230\u5185\u5B58\u4E2D\uFF0C\u5E76\u5B9A\u65F6\u66F4\u65B0\u3002</strong></p><p>\u534F\u8BAE\u6A21\u5757\u5C31\u662F\u652F\u6301\u4E0D\u540C\u7684\u534F\u8BAE\u8F6C\u6362\uFF0C\u6BCF\u4E2A\u534F\u8BAE\u7C7B\u578B\u7684\u8F6C\u6362\uFF0C\u90FD\u9700\u8981\u5355\u72EC\u5B9E\u73B0\uFF0C<strong>\u8FD9\u4E9B\u534F\u8BAE\u8F6C\u6362\uFF0C\u65E0\u975E\u5C31\u662F\u5148\u901A\u8FC7\u673A\u5668IP\u548C\u7AEF\u53E3\u521D\u59CB\u5316Client\uFF0C\u7136\u540E\u518D\u5C06\u6570\u636E\u8FDB\u884C\u8F6C\u6362\u540E\uFF0C\u76F4\u63A5\u53D1\u9001\u5230\u4E0B\u6E38\u7684\u673A\u5668\u3002</strong></p><p>\u6700\u540E\u5C31\u662F\u8FDE\u63A5\u6C60\uFF0C\u4E4B\u524D\u6211\u4EEC\u5176\u5B9E\u4E5F\u7528\u5230go\u81EA\u5E26\u7684pool\u6765\u505A\uFF0C\u4F46\u662F\u5F53\u5BF9pool\u6570\u636E\u8FDB\u884C\u66F4\u65B0\u65F6\uFF0C\u9700\u8981\u52A0\u9501\uFF0C\u6240\u4EE5\u6027\u80FD\u4E00\u76F4\u8D77\u4E0D\u6765\uFF0C\u540E\u6765<strong>\u6539\u6210\u4E86\u73AF\u5F62\u961F\u5217\uFF0C\u7136\u540E\u5BF9\u6570\u636E\u7684\u64CD\u4F5C\u5168\u90E8\u901A\u8FC7\u539F\u5B50\u64CD\u4F5C\u65B9\u5F0F\uFF0C\u5C31\u5B9E\u73B0\u4E86\u65E0\u9501\u64CD\u4F5C\uFF0C\u5927\u5927\u63D0\u9AD8\u7684\u5E76\u53D1\u6027\u80FD\u3002</strong></p><h4 id="\u5B9E\u73B0\u903B\u8F91" tabindex="-1"><a class="header-anchor" href="#\u5B9E\u73B0\u903B\u8F91" aria-hidden="true">#</a> \u5B9E\u73B0\u903B\u8F91</h4><p>\u8FD9\u4E2A\u662Fhal-proxy\u7684\u903B\u8F91\u5B9E\u73B0\u56FE\uFF0C\u753B\u4E862\u5929\uFF0C\u5305\u542B\u6240\u6709\u6838\u5FC3\u5BF9\u8C61\u7684\u4EA4\u4E92\u65B9\u5F0F\uFF0C\u8FD9\u91CC\u5C31\u4E0D\u53BB\u7EC6\u8BB2\uFF0C\u80FD\u638C\u63E1\u591A\u5C11\uFF0C\u9760\u5927\u5BB6\u81EA\u5DF1\u9886\u609F\uFF0C\u5982\u679C\u6709\u4EFB\u4F55\u7591\u95EE(\u6216\u8005\u770B\u4E0D\u6E05\u56FE\u7247)\uFF0C\u53EF\u4EE5\u5173\u6CE8\u6211\u516C\u4F17\u53F7\uFF0C\u52A0\u6211\u5FAE\u4FE1\u6C9F\u901A\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-c79970c9-9fce-4164-a299-bb268b058924.png" alt=""></p><hr>',85),v=a("\u6574\u7406\uFF1A\u6C89\u9ED8\u738B\u4E8C\uFF0C\u6233"),x={href:"https://mp.weixin.qq.com/s/b2xf4GiJksBQqjHVpsh49Q",target:"_blank",rel:"noopener noreferrer"},P=a("\u8F6C\u8F7D\u94FE\u63A5"),_=a("\uFF0C\u4F5C\u8005\uFF1A\u697C\u4ED4\uFF0C\u6233"),k={href:"https://mp.weixin.qq.com/s/0Qupyl5eCyQGFEAIY6GxoQ",target:"_blank",rel:"noopener noreferrer"},I=a("\u539F\u6587\u94FE\u63A5"),T=a("\u3002"),A=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png",alt:""})],-1);function j(w,S){const r=n("ExternalLinkIcon");return o(),s("div",null,[e("blockquote",null,[e("p",null,[c,e("a",p,[d,t(r)]),h,e("a",b,[u,t(r)]),f])]),m,e("blockquote",null,[e("p",null,[v,e("a",x,[P,t(r)]),_,e("a",k,[I,t(r)]),T])]),A])}var E=i(g,[["render",j],["__file","api-wangguan.html.vue"]]);export{E as default};
+import{_ as i}from"./plugin-vue_export-helper.21dcd24c.js";import{r as n,o,c as s,a as e,b as t,d as a,e as l}from"./app.615e41d8.js";const g={},c=a("\u6574\u7406\uFF1A\u6C89\u9ED8\u738B\u4E8C\uFF0C\u6233"),p={href:"https://mp.weixin.qq.com/s/b2xf4GiJksBQqjHVpsh49Q",target:"_blank",rel:"noopener noreferrer"},d=a("\u8F6C\u8F7D\u94FE\u63A5"),h=a("\uFF0C\u4F5C\u8005\uFF1A\u697C\u4ED4\uFF0C\u6233"),b={href:"https://mp.weixin.qq.com/s/0Qupyl5eCyQGFEAIY6GxoQ",target:"_blank",rel:"noopener noreferrer"},u=a("\u539F\u6587\u94FE\u63A5"),f=a("\u3002"),m=l('<p>\u5FAE\u670D\u52A1\u8FD1\u51E0\u5E74\u975E\u5E38\u706B\uFF0C\u56F4\u7ED5\u5FAE\u670D\u52A1\u7684\u6280\u672F\u751F\u6001\u4E5F\u6BD4\u8F83\u591A\uFF0C\u6BD4\u5982\u5FAE\u670D\u52A1\u7F51\u5173\u3001Docker\u3001Kubernetes\u7B49\u3002</p><p>\u6211\u662F\u4E8E2019\u5E74\u5F00\u59CB\u63A5\u89E6\u5FAE\u670D\u52A1\u7F51\u5173\uFF0C\u5F53\u65F6\u548C\u516C\u53F8\u7684\u4E00\u4F4D\u540C\u4E8B\u4E00\u8D77\u5F00\u53D1\uFF0C\u7531\u4E8E\u6280\u672F\u80FD\u529B\u6709\u9650\uFF0C\u6211\u53EA\u8D1F\u8D23\u7F51\u5173\u540E\u53F0\uFF0C\u540E\u7EED\u5FAE\u670D\u52A1\u7F51\u5173\u7684\u8FED\u4EE3\uFF0C\u6211\u5176\u5B9E\u6CA1\u6709\u53C2\u4E0E\uFF0C\u4E0D\u8FC7\u540E\u6765\u62BD\u7A7A\u770B\u4E86\u5FAE\u670D\u52A1\u7F51\u5173\u524D\u53F0\u7684\u4EE3\u7801\uFF0C\u6240\u4EE5\u5BF9\u8FD9\u5957\u5FAE\u670D\u52A1\u7F51\u5173\u7684\u5B9E\u73B0\u539F\u7406\u7B97\u662F\u57FA\u672C\u638C\u63E1\u3002</p><p>\u6700\u8FD1\u5728\u5199\u6280\u672F\u6808\u76F8\u5173\u7684\u6587\u7AE0\uFF0C\u521A\u597D\u5199\u5230\u5FAE\u670D\u52A1\u7F51\u5173\uFF0C\u5C31\u628A\u4E4B\u524D\u5B66\u4E60\u7684\u77E5\u8BC6\u8FDB\u884C\u7B80\u5355\u603B\u7ED3\uFF0C\u540C\u65F6\u4E5F\u628A\u5E02\u9762\u4E0A\u5E38\u7528\u7684\u5FAE\u670D\u52A1\u7F51\u5173\u8FDB\u884C\u68B3\u7406\uFF0C\u4E00\u65B9\u9762\u4FBF\u4E8E\u540E\u7EED\u6280\u672F\u9009\u578B\uFF0C\u53E6\u4E00\u65B9\u9762\u4E5F\u7B97\u662F\u7ED9\u81EA\u5DF1\u4E00\u4E2A\u4EA4\u4EE3\u3002\u4E0B\u9762\u662F\u6587\u7AE0\u76EE\u5F55\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-f910e9f2-0374-4afb-aef0-3ea47c9b7f67.png" alt=""></p><h2 id="api\u7F51\u5173\u57FA\u7840" tabindex="-1"><a class="header-anchor" href="#api\u7F51\u5173\u57FA\u7840" aria-hidden="true">#</a> API\u7F51\u5173\u57FA\u7840</h2><h3 id="\u4EC0\u4E48\u662Fapi\u7F51\u5173" tabindex="-1"><a class="header-anchor" href="#\u4EC0\u4E48\u662Fapi\u7F51\u5173" aria-hidden="true">#</a> \u4EC0\u4E48\u662FAPI\u7F51\u5173</h3><p><strong>API\u7F51\u5173\u662F\u4E00\u4E2A\u670D\u52A1\u5668\uFF0C\u662F\u7CFB\u7EDF\u7684\u552F\u4E00\u5165\u53E3\u3002</strong> \u4ECE\u9762\u5411\u5BF9\u8C61\u8BBE\u8BA1\u7684\u89D2\u5EA6\u770B\uFF0C\u5B83\u4E0E\u5916\u89C2\u6A21\u5F0F\u7C7B\u4F3C\u3002</p><p>API\u7F51\u5173\u5C01\u88C5\u4E86\u7CFB\u7EDF\u5185\u90E8\u67B6\u6784\uFF0C\u4E3A\u6BCF\u4E2A\u5BA2\u6237\u7AEF\u63D0\u4F9B\u4E00\u4E2A\u5B9A\u5236\u7684API\u3002\u5B83\u53EF\u80FD\u8FD8\u5177\u6709\u5176\u5B83\u804C\u8D23\uFF0C\u5982\u8EAB\u4EFD\u9A8C\u8BC1\u3001\u76D1\u63A7\u3001\u8D1F\u8F7D\u5747\u8861\u3001\u7F13\u5B58\u3001\u534F\u8BAE\u8F6C\u6362\u3001\u9650\u6D41\u7194\u65AD\u3001\u9759\u6001\u54CD\u5E94\u5904\u7406\u3002</p><p><strong>API\u7F51\u5173\u65B9\u5F0F\u7684\u6838\u5FC3\u8981\u70B9\u662F\uFF0C\u6240\u6709\u7684\u5BA2\u6237\u7AEF\u548C\u6D88\u8D39\u7AEF\u90FD\u901A\u8FC7\u7EDF\u4E00\u7684\u7F51\u5173\u63A5\u5165\u5FAE\u670D\u52A1</strong>\uFF0C\u5728\u7F51\u5173\u5C42\u5904\u7406\u6240\u6709\u7684\u975E\u4E1A\u52A1\u529F\u80FD\u3002\u901A\u5E38\uFF0C\u7F51\u5173\u4E5F\u662F\u63D0\u4F9BREST/HTTP\u7684\u8BBF\u95EEAPI\u3002</p><h3 id="\u7F51\u5173\u7684\u4E3B\u8981\u529F\u80FD" tabindex="-1"><a class="header-anchor" href="#\u7F51\u5173\u7684\u4E3B\u8981\u529F\u80FD" aria-hidden="true">#</a> \u7F51\u5173\u7684\u4E3B\u8981\u529F\u80FD</h3><p>\u5FAE\u670D\u52A1\u7F51\u5173\u4F5C\u4E3A\u5FAE\u670D\u52A1\u540E\u7AEF\u670D\u52A1\u7684\u7EDF\u4E00\u5165\u53E3\uFF0C\u5B83\u53EF\u4EE5\u7EDF\u7B79\u7BA1\u7406\u540E\u7AEF\u670D\u52A1\uFF0C\u4E3B\u8981\u5206\u4E3A\u6570\u636E\u5E73\u9762\u548C\u63A7\u5236\u5E73\u9762\uFF1A</p><ul><li>\u6570\u636E\u5E73\u9762\u4E3B\u8981\u529F\u80FD\u662F\u63A5\u5165\u7528\u6237\u7684HTTP\u8BF7\u6C42\u548C\u5FAE\u670D\u52A1\u88AB\u62C6\u5206\u540E\u7684\u805A\u5408\u3002\u4F7F\u7528\u5FAE\u670D\u52A1\u7F51\u5173\u7EDF\u4E00\u5BF9\u5916\u66B4\u9732\u540E\u7AEF\u670D\u52A1\u7684API\u548C\u5951\u7EA6\uFF0C\u8DEF\u7531\u548C\u8FC7\u6EE4\u529F\u80FD\u6B63\u662F\u7F51\u5173\u7684\u6838\u5FC3\u80FD\u529B\u6A21\u5757\u3002\u53E6\u5916\uFF0C\u5FAE\u670D\u52A1\u7F51\u5173\u53EF\u4EE5\u5B9E\u73B0\u62E6\u622A\u673A\u5236\u548C\u4E13\u6CE8\u8DE8\u6A2A\u5207\u9762\u7684\u529F\u80FD\uFF0C\u5305\u62EC\u534F\u8BAE\u8F6C\u6362\u3001\u5B89\u5168\u8BA4\u8BC1\u3001\u7194\u65AD\u9650\u6D41\u3001\u7070\u5EA6\u53D1\u5E03\u3001\u65E5\u5FD7\u7BA1\u7406\u3001\u6D41\u91CF\u76D1\u63A7\u7B49\u3002</li><li>\u63A7\u5236\u5E73\u9762\u4E3B\u8981\u529F\u80FD\u662F\u5BF9\u540E\u7AEF\u670D\u52A1\u505A\u7EDF\u4E00\u7684\u7BA1\u63A7\u548C\u914D\u7F6E\u7BA1\u7406\u3002\u4F8B\u5982\uFF0C\u53EF\u4EE5\u63A7\u5236\u7F51\u5173\u7684\u5F39\u6027\u4F38\u7F29\uFF1B\u53EF\u4EE5\u7EDF\u4E00\u4E0B\u53D1\u914D\u7F6E\uFF1B\u53EF\u4EE5\u5BF9\u7F51\u5173\u670D\u52A1\u6DFB\u52A0\u6807\u7B7E\uFF1B\u53EF\u4EE5\u5728\u5FAE\u670D\u52A1\u7F51\u5173\u4E0A\u901A\u8FC7\u914D\u7F6ESwagger\u529F\u80FD\u7EDF\u4E00\u5C06\u540E\u7AEF\u670D\u52A1\u7684API\u5951\u7EA6\u66B4\u9732\u7ED9\u4F7F\u7528\u65B9\uFF0C\u5B8C\u6210\u6587\u6863\u670D\u52A1\uFF0C\u63D0\u9AD8\u5DE5\u4F5C\u6548\u7387\u548C\u964D\u4F4E\u6C9F\u901A\u6210\u672C\u3002</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-f6ea867d-ffdf-4da2-a89d-fccbe6326110.png" alt=""></p><ul><li><strong>\u8DEF\u7531\u529F\u80FD</strong>\uFF1A\u8DEF\u7531\u662F\u5FAE\u670D\u52A1\u7F51\u5173\u7684\u6838\u5FC3\u80FD\u529B\u3002\u901A\u8FC7\u8DEF\u7531\u529F\u80FD\u5FAE\u670D\u52A1\u7F51\u5173\u53EF\u4EE5\u5C06\u8BF7\u6C42\u8F6C\u53D1\u5230\u76EE\u6807\u5FAE\u670D\u52A1\u3002\u5728\u5FAE\u670D\u52A1\u67B6\u6784\u4E2D\uFF0C\u7F51\u5173\u53EF\u4EE5\u7ED3\u5408\u6CE8\u518C\u4E2D\u5FC3\u7684\u52A8\u6001\u670D\u52A1\u53D1\u73B0\uFF0C\u5B9E\u73B0\u5BF9\u540E\u7AEF\u670D\u52A1\u7684\u53D1\u73B0\uFF0C\u8C03\u7528\u65B9\u53EA\u9700\u8981\u77E5\u9053\u7F51\u5173\u5BF9\u5916\u66B4\u9732\u7684\u670D\u52A1API\u5C31\u53EF\u4EE5\u900F\u660E\u5730\u8BBF\u95EE\u540E\u7AEF\u5FAE\u670D\u52A1\u3002</li><li><strong>\u8D1F\u8F7D\u5747\u8861</strong>\uFF1AAPI\u7F51\u5173\u7ED3\u5408\u8D1F\u8F7D\u5747\u8861\u6280\u672F\uFF0C\u5229\u7528Eureka\u6216\u8005Consul\u7B49\u670D\u52A1\u53D1\u73B0\u5DE5\u5177\uFF0C\u901A\u8FC7\u8F6E\u8BE2\u3001\u6307\u5B9A\u6743\u91CD\u3001IP\u5730\u5740\u54C8\u5E0C\u7B49\u673A\u5236\u5B9E\u73B0\u4E0B\u6E38\u670D\u52A1\u7684\u8D1F\u8F7D\u5747\u8861\u3002</li><li><strong>\u7EDF\u4E00\u9274\u6743</strong>\uFF1A\u4E00\u822C\u800C\u8A00\uFF0C\u65E0\u8BBA\u5BF9\u5185\u7F51\u8FD8\u662F\u5916\u7F51\u7684\u63A5\u53E3\u90FD\u9700\u8981\u505A\u7528\u6237\u8EAB\u4EFD\u8BA4\u8BC1\uFF0C\u800C\u7528\u6237\u8BA4\u8BC1\u5728\u4E00\u4E9B\u89C4\u6A21\u8F83\u5927\u7684\u7CFB\u7EDF\u4E2D\u90FD\u4F1A\u91C7\u7528\u7EDF\u4E00\u7684\u5355\u70B9\u767B\u5F55\uFF08Single Sign On\uFF09\u7CFB\u7EDF\uFF0C\u5982\u679C\u6BCF\u4E2A\u5FAE\u670D\u52A1\u90FD\u8981\u5BF9\u63A5\u5355\u70B9\u767B\u5F55\u7CFB\u7EDF\uFF0C\u90A3\u4E48\u663E\u7136\u6BD4\u8F83\u6D6A\u8D39\u8D44\u6E90\u4E14\u5F00\u53D1\u6548\u7387\u4F4E\u3002API\u7F51\u5173\u662F\u7EDF\u4E00\u7BA1\u7406\u5B89\u5168\u6027\u7684\u7EDD\u4F73\u573A\u6240\uFF0C\u53EF\u4EE5\u5C06\u8BA4\u8BC1\u7684\u90E8\u5206\u62BD\u53D6\u5230\u7F51\u5173\u5C42\uFF0C\u5FAE\u670D\u52A1\u7CFB\u7EDF\u65E0\u987B\u5173\u6CE8\u8BA4\u8BC1\u7684\u903B\u8F91\uFF0C\u53EA\u5173\u6CE8\u81EA\u8EAB\u4E1A\u52A1\u5373\u53EF\u3002</li><li><strong>\u534F\u8BAE\u8F6C\u6362</strong>\uFF1AAPI\u7F51\u5173\u7684\u4E00\u5927\u4F5C\u7528\u5728\u4E8E\u6784\u5EFA\u5F02\u6784\u7CFB\u7EDF\uFF0CAPI\u7F51\u5173\u4F5C\u4E3A\u5355\u4E00\u5165\u53E3\uFF0C\u901A\u8FC7\u534F\u8BAE\u8F6C\u6362\u6574\u5408\u540E\u53F0\u57FA\u4E8EREST\u3001AMQP\u3001Dubbo\u7B49\u4E0D\u540C\u98CE\u683C\u548C\u5B9E\u73B0\u6280\u672F\u7684\u5FAE\u670D\u52A1\uFF0C\u9762\u5411Web Mobile\u3001\u5F00\u653E\u5E73\u53F0\u7B49\u7279\u5B9A\u5BA2\u6237\u7AEF\u63D0\u4F9B\u7EDF\u4E00\u670D\u52A1\u3002</li><li><strong>\u6307\u6807\u76D1\u63A7</strong>\uFF1A\u7F51\u5173\u53EF\u4EE5\u7EDF\u8BA1\u540E\u7AEF\u670D\u52A1\u7684\u8BF7\u6C42\u6B21\u6570\uFF0C\u5E76\u4E14\u53EF\u4EE5\u5B9E\u65F6\u5730\u66F4\u65B0\u5F53\u524D\u7684\u6D41\u91CF\u5065\u5EB7\u72B6\u6001\uFF0C\u53EF\u4EE5\u5BF9URL\u7C92\u5EA6\u7684\u670D\u52A1\u8FDB\u884C\u5EF6\u8FDF\u7EDF\u8BA1\uFF0C\u4E5F\u53EF\u4EE5\u4F7F\u7528Hystrix Dashboard\u67E5\u770B\u540E\u7AEF\u670D\u52A1\u7684\u6D41\u91CF\u72B6\u6001\u53CA\u662F\u5426\u6709\u7194\u65AD\u53D1\u751F\u3002</li><li><strong>\u9650\u6D41\u7194\u65AD</strong>\uFF1A\u5728\u67D0\u4E9B\u573A\u666F\u4E0B\u9700\u8981\u63A7\u5236\u5BA2\u6237\u7AEF\u7684\u8BBF\u95EE\u6B21\u6570\u548C\u8BBF\u95EE\u9891\u7387\uFF0C\u4E00\u4E9B\u9AD8\u5E76\u53D1\u7CFB\u7EDF\u6709\u65F6\u8FD8\u4F1A\u6709\u9650\u6D41\u7684\u9700\u6C42\u3002\u5728\u7F51\u5173\u4E0A\u53EF\u4EE5\u914D\u7F6E\u4E00\u4E2A\u9608\u503C\uFF0C\u5F53\u8BF7\u6C42\u6570\u8D85\u8FC7\u9608\u503C\u65F6\u5C31\u76F4\u63A5\u8FD4\u56DE\u9519\u8BEF\u800C\u4E0D\u7EE7\u7EED\u8BBF\u95EE\u540E\u53F0\u670D\u52A1\u3002\u5F53\u51FA\u73B0\u6D41\u91CF\u6D2A\u5CF0\u6216\u8005\u540E\u7AEF\u670D\u52A1\u51FA\u73B0\u5EF6\u8FDF\u6216\u6545\u969C\u65F6\uFF0C\u7F51\u5173\u80FD\u591F\u4E3B\u52A8\u8FDB\u884C\u7194\u65AD\uFF0C\u4FDD\u62A4\u540E\u7AEF\u670D\u52A1\uFF0C\u5E76\u4FDD\u6301\u524D\u7AEF\u7528\u6237\u4F53\u9A8C\u826F\u597D\u3002</li><li><strong>\u9ED1\u767D\u540D\u5355</strong>\uFF1A\u5FAE\u670D\u52A1\u7F51\u5173\u53EF\u4EE5\u4F7F\u7528\u7CFB\u7EDF\u9ED1\u540D\u5355\uFF0C\u8FC7\u6EE4HTTP\u8BF7\u6C42\u7279\u5F81\uFF0C\u62E6\u622A\u5F02\u5E38\u5BA2\u6237\u7AEF\u7684\u8BF7\u6C42\uFF0C\u4F8B\u5982DDoS\u653B\u51FB\u7B49\u4FB5\u8680\u5E26\u5BBD\u6216\u8D44\u6E90\u8FEB\u4F7F\u670D\u52A1\u4E2D\u65AD\u7B49\u884C\u4E3A\uFF0C\u53EF\u4EE5\u5728\u7F51\u5173\u5C42\u9762\u8FDB\u884C\u62E6\u622A\u8FC7\u6EE4\u3002\u6BD4\u8F83\u5E38\u89C1\u7684\u62E6\u622A\u7B56\u7565\u662F\u6839\u636EIP\u5730\u5740\u589E\u52A0\u9ED1\u540D\u5355\u3002\u5728\u5B58\u5728\u9274\u6743\u7BA1\u7406\u7684\u8DEF\u7531\u670D\u52A1\u4E2D\u53EF\u4EE5\u901A\u8FC7\u8BBE\u7F6E\u767D\u540D\u5355\u8DF3\u8FC7\u9274\u6743\u7BA1\u7406\u800C\u76F4\u63A5\u8BBF\u95EE\u540E\u7AEF\u670D\u52A1\u8D44\u6E90\u3002</li><li><strong>\u7070\u5EA6\u53D1\u5E03</strong>\uFF1A\u5FAE\u670D\u52A1\u7F51\u5173\u53EF\u4EE5\u6839\u636EHTTP\u8BF7\u6C42\u4E2D\u7684\u7279\u6B8A\u6807\u8BB0\u548C\u540E\u7AEF\u670D\u52A1\u5217\u8868\u5143\u6570\u636E\u6807\u8BC6\u8FDB\u884C\u6D41\u91CF\u63A7\u5236\uFF0C\u5B9E\u73B0\u5728\u7528\u6237\u65E0\u611F\u77E5\u7684\u60C5\u51B5\u4E0B\u5B8C\u6210\u7070\u5EA6\u53D1\u5E03\u3002</li><li><strong>\u6D41\u91CF\u67D3\u8272</strong>\uFF1A\u548C\u7070\u5EA6\u53D1\u5E03\u7684\u539F\u7406\u76F8\u4F3C\uFF0C\u7F51\u5173\u53EF\u4EE5\u6839\u636EHTTP\u8BF7\u6C42\u7684Host\u3001Head\u3001Agent\u7B49\u6807\u8BC6\u5BF9\u8BF7\u6C42\u8FDB\u884C\u67D3\u8272\uFF0C\u6709\u4E86\u7F51\u5173\u7684\u6D41\u91CF\u67D3\u8272\u529F\u80FD\uFF0C\u6211\u4EEC\u53EF\u4EE5\u5BF9\u670D\u52A1\u540E\u7EED\u7684\u8C03\u7528\u94FE\u8DEF\u8FDB\u884C\u8DDF\u8E2A\uFF0C\u5BF9\u670D\u52A1\u5EF6\u8FDF\u53CA\u670D\u52A1\u8FD0\u884C\u72B6\u51B5\u8FDB\u884C\u8FDB\u4E00\u6B65\u7684\u94FE\u8DEF\u5206\u6790\u3002</li><li><strong>\u6587\u6863\u4E2D\u5FC3</strong>\uFF1A\u7F51\u5173\u7ED3\u5408Swagger\uFF0C\u53EF\u4EE5\u5C06\u540E\u7AEF\u7684\u5FAE\u670D\u52A1\u66B4\u9732\u7ED9\u7F51\u5173\uFF0C\u7F51\u5173\u4F5C\u4E3A\u7EDF\u4E00\u7684\u5165\u53E3\u7ED9\u63A5\u53E3\u7684\u4F7F\u7528\u65B9\u63D0\u4F9B\u67E5\u770B\u540E\u7AEF\u670D\u52A1\u7684API\u89C4\u8303\uFF0C\u4E0D\u9700\u8981\u77E5\u9053\u6BCF\u4E00\u4E2A\u540E\u7AEF\u5FAE\u670D\u52A1\u7684Swagger\u5730\u5740\uFF0C\u8FD9\u6837\u7F51\u5173\u8D77\u5230\u4E86\u5BF9\u540E\u7AEFAPI\u805A\u5408\u7684\u6548\u679C\u3002</li><li><strong>\u65E5\u5FD7\u5BA1\u8BA1</strong>\uFF1A\u5FAE\u670D\u52A1\u7F51\u5173\u53EF\u4EE5\u4F5C\u4E3A\u7EDF\u4E00\u7684\u65E5\u5FD7\u8BB0\u5F55\u548C\u6536\u96C6\u5668\uFF0C\u5BF9\u670D\u52A1URL\u7C92\u5EA6\u7684\u65E5\u5FD7\u8BF7\u6C42\u4FE1\u606F\u548C\u54CD\u5E94\u4FE1\u606F\u8FDB\u884C\u62E6\u622A\u3002</li></ul><h2 id="api\u7F51\u5173\u9009\u578B" tabindex="-1"><a class="header-anchor" href="#api\u7F51\u5173\u9009\u578B" aria-hidden="true">#</a> API\u7F51\u5173\u9009\u578B</h2><h3 id="\u5E38\u7528api\u7F51\u5173" tabindex="-1"><a class="header-anchor" href="#\u5E38\u7528api\u7F51\u5173" aria-hidden="true">#</a> \u5E38\u7528API\u7F51\u5173</h3><p>\u5148\u7B80\u5355\u770B\u4E00\u4E0B\u5E02\u9762\u4E0A\u5E38\u7528\u7684API\u7F51\u5173\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-ddaf1b1e-60b2-4cff-bab2-2b7b32f07f72.png" alt=""></p><h4 id="nginx" tabindex="-1"><a class="header-anchor" href="#nginx" aria-hidden="true">#</a> Nginx</h4><p>Nginx\u662F\u4E00\u4E2A\u9AD8\u6027\u80FD\u7684HTTP\u548C\u53CD\u5411\u4EE3\u7406\u670D\u52A1\u5668\u3002<strong>Nginx\u4E00\u65B9\u9762\u53EF\u4EE5\u505A\u53CD\u5411\u4EE3\u7406\uFF0C\u53E6\u5916\u4E00\u65B9\u9762\u53EF\u4EE5\u505A\u9759\u6001\u8D44\u6E90\u670D\u52A1\u5668\uFF0C\u63A5\u53E3\u4F7F\u7528Lua\u52A8\u6001\u8BED\u8A00\u53EF\u4EE5\u5B8C\u6210\u7075\u6D3B\u7684\u5B9A\u5236\u529F\u80FD\u3002</strong></p><p>Nginx \u5728\u542F\u52A8\u540E\uFF0C\u4F1A\u6709\u4E00\u4E2A Master \u8FDB\u7A0B\u548C\u591A\u4E2A Worker \u8FDB\u7A0B\uFF0CMaster \u8FDB\u7A0B\u548C Worker \u8FDB\u7A0B\u4E4B\u95F4\u662F\u901A\u8FC7\u8FDB\u7A0B\u95F4\u901A\u4FE1\u8FDB\u884C\u4EA4\u4E92\u7684\uFF0C\u5982\u56FE\u6240\u793A\u3002Worker \u5DE5\u4F5C\u8FDB\u7A0B\u7684\u963B\u585E\u70B9\u662F\u5728\u50CF select()\u3001epoll_wait() \u7B49\u8FD9\u6837\u7684 I/O \u591A\u8DEF\u590D\u7528\u51FD\u6570\u8C03\u7528\u5904\uFF0C\u4EE5\u7B49\u5F85\u53D1\u751F\u6570\u636E\u53EF\u8BFB / \u5199\u4E8B\u4EF6\u3002Nginx \u91C7\u7528\u4E86\u5F02\u6B65\u975E\u963B\u585E\u7684\u65B9\u5F0F\u6765\u5904\u7406\u8BF7\u6C42\uFF0C\u4E5F\u5C31\u662F\u8BF4\uFF0CNginx \u662F\u53EF\u4EE5\u540C\u65F6\u5904\u7406\u6210\u5343\u4E0A\u4E07\u4E2A\u8BF7\u6C42\u7684\u3002</p><h4 id="zuul" tabindex="-1"><a class="header-anchor" href="#zuul" aria-hidden="true">#</a> Zuul</h4><p>Zuul \u662F Netflix \u5F00\u6E90\u7684\u4E00\u4E2AAPI\u7F51\u5173\u7EC4\u4EF6\uFF0C\u5B83\u53EF\u4EE5\u548C Eureka\u3001Ribbon\u3001Hystrix \u7B49\u7EC4\u4EF6\u914D\u5408\u4F7F\u7528\u3002\u793E\u533A\u6D3B\u8DC3\uFF0C\u878D\u5408\u4E8E SpringCloud \u5B8C\u6574\u751F\u6001\uFF0C\u662F\u6784\u5EFA\u5FAE\u670D\u52A1\u4F53\u7CFB\u524D\u7F6E\u7F51\u5173\u670D\u52A1\u7684\u6700\u4F73\u9009\u578B\u4E4B\u4E00\u3002</p><p>Zuul \u7684\u6838\u5FC3\u662F\u4E00\u7CFB\u5217\u7684\u8FC7\u6EE4\u5668\uFF0C\u8FD9\u4E9B\u8FC7\u6EE4\u5668\u53EF\u4EE5\u5B8C\u6210\u4EE5\u4E0B\u529F\u80FD\uFF1A</p><ul><li><strong>\u7EDF\u4E00\u9274\u6743 + \u52A8\u6001\u8DEF\u7531 + \u8D1F\u8F7D\u5747\u8861 + \u538B\u529B\u6D4B\u8BD5</strong></li><li><strong>\u5BA1\u67E5\u4E0E\u76D1\u63A7</strong>\uFF1A\u4E0E\u8FB9\u7F18\u4F4D\u7F6E\u8FFD\u8E2A\u6709\u610F\u4E49\u7684\u6570\u636E\u548C\u7EDF\u8BA1\u7ED3\u679C\uFF0C\u4ECE\u800C\u5E26\u6765\u7CBE\u786E\u7684\u751F\u4EA7\u89C6\u56FE\u3002</li><li><strong>\u591A\u533A\u57DF\u5F39\u6027</strong>\uFF1A\u8DE8\u8D8A AWS Region \u8FDB\u884C\u8BF7\u6C42\u8DEF\u7531\uFF0C\u65E8\u5728\u5B9E\u73B0 ELB\uFF08Elastic Load Balancing\uFF0C\u5F39\u6027\u8D1F\u8F7D\u5747\u8861\uFF09\u4F7F\u7528\u7684\u591A\u6837\u5316\uFF0C\u4EE5\u53CA\u8BA9\u7CFB\u7EDF\u7684\u8FB9\u7F18\u66F4\u8D34\u8FD1\u7CFB\u7EDF\u7684\u4F7F\u7528\u8005\u3002</li></ul><p>Zuul \u76EE\u524D\u6709\u4E24\u4E2A\u5927\u7684\u7248\u672C\uFF1A<strong>Zuul1 \u548C Zuul2</strong></p><p>Zuul1 \u662F\u57FA\u4E8E Servlet \u6846\u67B6\u6784\u5EFA\uFF0C\u5982\u56FE\u6240\u793A\uFF0C\u91C7\u7528\u7684\u662F\u963B\u585E\u548C\u591A\u7EBF\u7A0B\u65B9\u5F0F\uFF0C\u5373\u4E00\u4E2A\u7EBF\u7A0B\u5904\u7406\u4E00\u6B21\u8FDE\u63A5\u8BF7\u6C42\uFF0C\u8FD9\u79CD\u65B9\u5F0F\u5728\u5185\u90E8\u5EF6\u8FDF\u4E25\u91CD\u3001\u8BBE\u5907\u6545\u969C\u8F83\u591A\u60C5\u51B5\u4E0B\u4F1A\u5F15\u8D77\u5B58\u6D3B\u7684\u8FDE\u63A5\u589E\u591A\u548C\u7EBF\u7A0B\u589E\u52A0\u7684\u60C5\u51B5\u53D1\u751F\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-93bef98d-7d71-48d1-943a-b8ede72432c8.png" alt=""></p><p>Netflix \u53D1\u5E03\u7684 Zuul2 \u6709\u91CD\u5927\u7684\u66F4\u65B0\uFF0C\u5B83\u8FD0\u884C\u5728\u5F02\u6B65\u548C\u65E0\u963B\u585E\u6846\u67B6\u4E0A\uFF0C\u6BCF\u4E2A CPU \u6838\u4E00\u4E2A\u7EBF\u7A0B\uFF0C\u5904\u7406\u6240\u6709\u7684\u8BF7\u6C42\u548C\u54CD\u5E94\uFF0C\u8BF7\u6C42\u548C\u54CD\u5E94\u7684\u751F\u547D\u5468\u671F\u662F\u901A\u8FC7\u4E8B\u4EF6\u548C\u56DE\u8C03\u6765\u5904\u7406\u7684\uFF0C\u8FD9\u79CD\u65B9\u5F0F\u51CF\u5C11\u4E86\u7EBF\u7A0B\u6570\u91CF\uFF0C\u56E0\u6B64\u5F00\u9500\u8F83\u5C0F\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-90dfae10-7cbd-4099-a5df-ea09a1435bc0.png" alt=""></p><h4 id="spring-cloud-getway" tabindex="-1"><a class="header-anchor" href="#spring-cloud-getway" aria-hidden="true">#</a> Spring Cloud GetWay</h4><p>Spring Cloud Gateway \u662FSpring Cloud\u7684\u4E00\u4E2A\u5168\u65B0\u7684API\u7F51\u5173\u9879\u76EE\uFF0C\u76EE\u7684\u662F\u4E3A\u4E86\u66FF\u6362\u6389Zuul1\uFF0C\u5B83\u57FA\u4E8ESpring5.0 + SpringBoot2.0 + WebFlux\uFF08\u57FA\u4E8E\u2FBC\u6027\u80FD\u7684Reactor\u6A21\u5F0F\u54CD\u5E94\u5F0F\u901A\u4FE1\u6846\u67B6Netty\uFF0C\u5F02\u6B65\u2FAE\u963B\u585E\u6A21\u578B\uFF09\u7B49\u6280\u672F\u5F00\u53D1\uFF0C\u6027\u80FD\u2FBC\u4E8EZuul\uFF0C\u5B98\u2F45\u6D4B\u8BD5\uFF0C<strong>Spring Cloud GateWay\u662FZuul\u76841.6\u500D</strong>\uFF0C\u65E8\u5728\u4E3A\u5FAE\u670D\u52A1\u67B6\u6784\u63D0\u4F9B\u2F00\u79CD\u7B80\u5355\u6709\u6548\u7684\u7EDF\u2F00\u7684API\u8DEF\u7531\u7BA1\u7406\u2F45\u5F0F\u3002</p><p>Spring Cloud Gateway\u53EF\u4EE5\u4E0ESpring Cloud Discovery Client\uFF08\u5982Eureka\uFF09\u3001Ribbon\u3001Hystrix\u7B49\u7EC4\u4EF6\u914D\u5408\u4F7F\u7528\uFF0C<strong>\u5B9E\u73B0\u8DEF\u7531\u8F6C\u53D1\u3001\u8D1F\u8F7D\u5747\u8861\u3001\u7194\u65AD\u3001\u9274\u6743\u3001\u8DEF\u5F84\u91CD\u5199\u3001\u2F47\u5FD7\u76D1\u63A7\u7B49\uFF0C\u5E76\u4E14Gateway\u8FD8\u5185\u7F6E\u4E86\u9650\u6D41\u8FC7\u6EE4\u5668\uFF0C\u5B9E\u73B0\u4E86\u9650\u6D41\u7684\u529F\u80FD\u3002</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-71c6dfa6-dcf3-43ab-98bf-34d7ef588f02.png" alt=""></p><h4 id="kong" tabindex="-1"><a class="header-anchor" href="#kong" aria-hidden="true">#</a> Kong</h4><p>Kong\u662F\u4E00\u6B3E\u57FA\u4E8EOpenResty\uFF08Nginx + Lua\u6A21\u5757\uFF09\u7F16\u5199\u7684\u9AD8\u53EF\u7528\u3001\u6613\u6269\u5C55\u7684\uFF0C\u7531Mashape\u516C\u53F8\u5F00\u6E90\u7684API Gateway\u9879\u76EE\u3002<strong>Kong\u662F\u57FA\u4E8ENGINX\u548CApache Cassandra\u6216PostgreSQL\u6784\u5EFA\u7684</strong>\uFF0C\u80FD\u63D0\u4F9B\u6613\u4E8E\u4F7F\u7528\u7684RESTful API\u6765\u64CD\u4F5C\u548C\u914D\u7F6EAPI\u7BA1\u7406\u7CFB\u7EDF\uFF0C\u6240\u4EE5\u5B83\u53EF\u4EE5\u6C34\u5E73\u6269\u5C55\u591A\u4E2AKong\u670D\u52A1\u5668\uFF0C\u901A\u8FC7\u524D\u7F6E\u7684\u8D1F\u8F7D\u5747\u8861\u914D\u7F6E\u628A\u8BF7\u6C42\u5747\u5300\u5730\u5206\u53D1\u5230\u5404\u4E2AServer\uFF0C\u6765\u5E94\u5BF9\u5927\u6279\u91CF\u7684\u7F51\u7EDC\u8BF7\u6C42\u3002 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-e2113ab8-0fc2-4df5-91be-60154e557cc0.png" alt=""></p><p>Kong\u4E3B\u8981\u6709\u4E09\u4E2A\u7EC4\u4EF6\uFF1A</p><ul><li>Kong Server \uFF1A\u57FA\u4E8ENginx\u7684\u670D\u52A1\u5668\uFF0C\u7528\u6765\u63A5\u6536API\u8BF7\u6C42\u3002</li><li>Apache Cassandra/PostgreSQL \uFF1A\u7528\u6765\u5B58\u50A8\u64CD\u4F5C\u6570\u636E\u3002</li><li>Kong dashboard\uFF1A\u5B98\u65B9\u63A8\u8350UI\u7BA1\u7406\u5DE5\u5177\uFF0C\u4E5F\u53EF\u4EE5\u4F7F\u7528 restfull \u65B9\u5F0F\u7BA1\u7406admin api\u3002</li></ul><p>Kong\u91C7\u7528\u63D2\u4EF6\u673A\u5236\u8FDB\u884C\u529F\u80FD\u5B9A\u5236\uFF0C\u63D2\u4EF6\u96C6\uFF08\u53EF\u4EE5\u662F0\u6216N\u4E2A\uFF09\u5728API\u8BF7\u6C42\u54CD\u5E94\u5FAA\u73AF\u7684\u751F\u547D\u5468\u671F\u4E2D\u88AB\u6267\u884C\u3002\u63D2\u4EF6\u4F7F\u7528Lua\u7F16\u5199\uFF0C\u76EE\u524D\u5DF2\u6709\u51E0\u4E2A\u57FA\u7840\u529F\u80FD\uFF1A<strong>HTTP\u57FA\u672C\u8BA4\u8BC1\u3001\u5BC6\u94A5\u8BA4\u8BC1\u3001CORS\uFF08Cross-Origin Resource Sharing\uFF0C\u8DE8\u57DF\u8D44\u6E90\u5171\u4EAB\uFF09\u3001TCP\u3001UDP\u3001\u6587\u4EF6\u65E5\u5FD7\u3001API\u8BF7\u6C42\u9650\u6D41\u3001\u8BF7\u6C42\u8F6C\u53D1\u4EE5\u53CANginx\u76D1\u63A7\u3002</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-c6c7c5e3-214b-472e-b998-8adc820aa922.png" alt=""></p><p>Kong\u7F51\u5173\u5177\u6709\u4EE5\u4E0B\u7684\u7279\u6027\uFF1A</p><ul><li>\u53EF\u6269\u5C55\u6027: \u901A\u8FC7\u7B80\u5355\u5730\u6DFB\u52A0\u66F4\u591A\u7684\u670D\u52A1\u5668\uFF0C\u53EF\u4EE5\u8F7B\u677E\u5730\u8FDB\u884C\u6A2A\u5411\u6269\u5C55\uFF0C\u8FD9\u610F\u5473\u7740\u60A8\u7684\u5E73\u53F0\u53EF\u4EE5\u5728\u4E00\u4E2A\u8F83\u4F4E\u8D1F\u8F7D\u7684\u60C5\u51B5\u4E0B\u5904\u7406\u4EFB\u4F55\u8BF7\u6C42\uFF1B</li><li>\u6A21\u5757\u5316: \u53EF\u4EE5\u901A\u8FC7\u6DFB\u52A0\u65B0\u7684\u63D2\u4EF6\u8FDB\u884C\u6269\u5C55\uFF0C\u8FD9\u4E9B\u63D2\u4EF6\u53EF\u4EE5\u901A\u8FC7RESTful Admin API\u8F7B\u677E\u914D\u7F6E\uFF1B</li><li>\u5728\u4EFB\u4F55\u57FA\u7840\u67B6\u6784\u4E0A\u8FD0\u884C: Kong\u7F51\u5173\u53EF\u4EE5\u5728\u4EFB\u4F55\u5730\u65B9\u90FD\u80FD\u8FD0\u884C\u3002\u60A8\u53EF\u4EE5\u5728\u4E91\u6216\u5185\u90E8\u7F51\u7EDC\u73AF\u5883\u4E2D\u90E8\u7F72Kong\uFF0C\u5305\u62EC\u5355\u4E2A\u6216\u591A\u4E2A\u6570\u636E\u4E2D\u5FC3\u8BBE\u7F6E\uFF0C\u4EE5\u53CApublic\uFF0Cprivate \u6216invite-only APIs\u3002</li></ul><h4 id="traefik" tabindex="-1"><a class="header-anchor" href="#traefik" aria-hidden="true">#</a> Traefik</h4><p>Tr\xE6f\u026Ak \u662F\u4E00\u4E2A\u4E3A\u4E86\u8BA9\u90E8\u7F72\u5FAE\u670D\u52A1\u66F4\u52A0\u4FBF\u6377\u800C\u8BDE\u751F\u7684\u73B0\u4EE3HTTP\u53CD\u5411\u4EE3\u7406\u3001\u8D1F\u8F7D\u5747\u8861\u5DE5\u5177\u3002 \u5B83\u652F\u6301\u591A\u79CD\u540E\u53F0 (Docker, Swarm, Kubernetes, Marathon, Mesos, Consul, Etcd, Zookeeper, BoltDB, Rest API, file\u2026) \u6765\u81EA\u52A8\u5316\u3001\u52A8\u6001\u7684\u5E94\u7528\u5B83\u7684\u914D\u7F6E\u6587\u4EF6\u8BBE\u7F6E\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-553541d9-870d-45a8-8026-a1274d809e5e.png" alt=""></p><p>\u91CD\u8981\u7279\u6027\uFF1A</p><ul><li>\u5B83\u975E\u5E38\u5FEB\uFF0C\u65E0\u9700\u5B89\u88C5\u5176\u4ED6\u4F9D\u8D56\uFF0C\u901A\u8FC7Go\u8BED\u8A00\u7F16\u5199\u7684\u5355\u4E00\u53EF\u6267\u884C\u6587\u4EF6\uFF1B</li><li><strong>\u591A\u79CD\u540E\u53F0\u652F\u6301\uFF1ADocker, Swarm, Kubernetes, Marathon, Mesos, Consul, Etcd\uFF1B</strong></li><li>\u652F\u6301\u652F\u6301Rest API\u3001Websocket\u3001HTTP/2\u3001Docker\u955C\u50CF\uFF1B</li><li>\u76D1\u542C\u540E\u53F0\u53D8\u5316\u8FDB\u800C\u81EA\u52A8\u5316\u5E94\u7528\u65B0\u7684\u914D\u7F6E\u6587\u4EF6\u8BBE\u7F6E\uFF1B</li><li>\u914D\u7F6E\u6587\u4EF6\u70ED\u66F4\u65B0\uFF0C\u65E0\u9700\u91CD\u542F\u8FDB\u7A0B\uFF1B</li><li>\u540E\u7AEF\u65AD\u8DEF\u5668\u3001\u8D1F\u8F7D\u5747\u8861\u3001\u5BB9\u9519\u673A\u5236\uFF1B</li><li>\u6E05\u723D\u7684\u524D\u7AEF\u9875\u9762\uFF0C\u53EF\u76D1\u63A7\u670D\u52A1\u6307\u6807\u3002</li></ul><blockquote><p>\u5173\u4E8ETraefik\u7684\u66F4\u591A\u5185\u5BB9\uFF0C\u53EF\u4EE5\u67E5\u770B\u5B98\u7F51\uFF1Ahttps://traefik.cn/</p></blockquote><h3 id="api\u7F51\u5173\u5BF9\u6BD4" tabindex="-1"><a class="header-anchor" href="#api\u7F51\u5173\u5BF9\u6BD4" aria-hidden="true">#</a> API\u7F51\u5173\u5BF9\u6BD4</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-ad51c257-fe2d-435d-a043-92a70957756e.png" alt=""><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-ae017d9d-db0d-4322-805e-5230189561f5.png" alt=""><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-daf82b5b-011d-488d-9d60-c1221bd5b0ec.png" alt=""></p><p>\u4E0A\u9762\u662F\u7F51\u5173\u5BF9\u6BD4\u622A\u56FE\uFF0C\u5077\u4E2A\u61D2\uFF0C\u5927\u5BB6\u4E3B\u8981\u5173\u6CE8Kong\u3001Traefik\u548CZuul\u5373\u53EF\uFF1A</p><ul><li>\u4ECE<strong>\u5F00\u6E90\u793E\u533A\u6D3B\u8DC3\u5EA6</strong>\u6765\u770B\uFF0C\u65E0\u7591\u662FKong\u548CTraefik\u8F83\u597D\uFF1B</li><li>\u4ECE<strong>\u6210\u719F\u5EA6</strong>\u6765\u770B\uFF0C\u8F83\u597D\u7684\u662FKong\u3001Tyk\u3001Traefik\uFF1B</li><li>\u4ECE<strong>\u6027\u80FD</strong>\u6765\u770B\uFF0CKong\u8981\u6BD4\u5176\u4ED6\u51E0\u4E2A\u9886\u5148\u4E00\u4E9B\uFF1B</li><li>\u4ECE<strong>\u67B6\u6784\u4F18\u52BF</strong>\u7684\u6269\u5C55\u6027\u6765\u770B\uFF0CKong\u3001Tyk\u6709\u4E30\u5BCC\u7684\u63D2\u4EF6\uFF0CAmbassador\u4E5F\u6709\u63D2\u4EF6\u4F46\u4E0D\u591A\uFF0C\u800CZuul\u662F\u5B8C\u5168\u9700\u8981\u81EA\u7814\uFF0C\u4F46Zuul\u7531\u4E8E\u4E0ESpring Cloud\u6DF1\u5EA6\u96C6\u6210\uFF0C\u4F7F\u7528\u5EA6\u4E5F\u5F88\u9AD8\uFF0C\u8FD1\u5E74\u6765Istio\u670D\u52A1\u7F51\u683C\u7684\u6D41\u884C\uFF0CAmbassador\u56E0\u4E3A\u80FD\u591F\u548CIstio\u65E0\u7F1D\u96C6\u6210\u4E5F\u662F\u76F8\u5F53\u5927\u7684\u4F18\u52BF\u3002</li></ul><p>\u4E0B\u9762\u662F\u5176\u5B83\u7F51\u53CB\u7684\u601D\u8003\u7ED3\u8BBA\uFF0C\u53EF\u4F9B\u53C2\u8003\uFF1A</p><ul><li><strong>\u6027\u80FD</strong>\uFF1ANginx+Lua\u5F62\u5F0F\u5FC5\u7136\u662F\u9AD8\u4E8EJava\u8BED\u8A00\u5B9E\u73B0\u7684\u7F51\u5173\u7684\uFF0CJava\u6280\u672F\u6808\u91CC\u9762Zuul1.0\u662F\u57FA\u4E8EServlet\u5B9E\u73B0\u7684\uFF0C\u5269\u4E0B\u90FD\u662F\u57FA\u4E8Ewebflux\u5B9E\u73B0\uFF0C\u6027\u80FD\u662F\u9AD8\u4E8E\u57FA\u4E8EServlet\u5B9E\u73B0\u7684\u3002<strong>\u5728\u6027\u80FD\u65B9\u9762\u6211\u89C9\u5F97\u9009\u62E9\u7F51\u5173\u53EF\u80FD\u4E0D\u7B97\u90A3\u4E48\u91CD\u8981\uFF0C\u591A\u52A0\u51E0\u53F0\u673A\u5668\u5C31\u53EF\u4EE5\u641E\u5B9A\u3002</strong></li><li><strong>\u53EF\u7EF4\u62A4\u6027\u548C\u6269\u5C55\u6027</strong>\uFF1ANginx+Lua\u8FD9\u4E2A\u7EC4\u5408\u638C\u63E1\u7684\u4EBA\u4E0D\u7B97\u591A\uFF0C\u5982\u679C\u56E2\u961F\u6709\u5927\u795E\uFF0C\u5927\u4F6C\u4EEC\u5C31\u968F\u610F\u4E86\uFF0C\u5F53\u6CA1\u770B\u5230\u8FD9\u6BB5\u8BDD\uFF0C\u5BF9\u4E8E\u4E00\u822C\u56E2\u961F\u6765\u8BF4\u7684\u8BDD\uFF0C\u9009\u62E9\u81EA\u5DF1\u56E2\u961F\u64C5\u957F\u7684\u8BED\u8A00\u66F4\u91CD\u8981\u3002Java\u6280\u672F\u6808\u4E0B\u76843\u79CD\u7F51\u5173\uFF0C\u5BF9\u4E8EZuul\u548CSpring Cloud Getway\u9700\u8981\u6216\u591A\u6216\u5C11\u8981\u641E\u4E00\u4E9B\u96C6\u6210\u548C\u914D\u7F6E\u9875\u9762\u6765\u7EF4\u62A4\uFF0C\u4F46\u662F\u5BF9\u4E8ESoul\u6211\u5C31\u65E0\u8111\u770B\u770B\u6587\u7AE0\uFF0C\u9700\u8981\u54EA\u4E2A\u642C\u54EA\u4E2A\u597D\u4E86\uFF0C\u5C24\u5176\u662F\u53EF\u4EE5\u65E0\u8111\u5BF9\u63A5Dubbo\u7F8E\u6ECB\u6ECB\uFF0C\u6B64\u5916Soul2.0\u4EE5\u540E\u7248\u672C\u53EF\u4EE5\u6446\u8131ZK\uFF0C\u5728\u6211\u5FC3\u91CC\u518D\u65E0\u8BDF\u75C5\uFF0C\u6211\u5C31\u559C\u6B22\u65E0\u8111\u64CD\u4F5C\u3002</li><li><strong>\u9AD8\u53EF\u7528</strong>\uFF1A\u5BF9\u4E8E\u7F51\u5173\u9AD8\u53EF\u7528\u57FA\u672C\u90FD\u662F\u7EDF\u4E00\u7684\u7B56\u7565\u90FD\u662F\u91C7\u7528\u591A\u673A\u5668\u90E8\u7F72\u7684\u65B9\u5F0F\uFF0C\u524D\u9762\u6302\u4E00\u4E2A\u8D1F\u8F7D\uFF0C\u5BF9\u4E8E\u800C\u5916\u9700\u8981\u7528\u7684\u4E00\u4E9B\u7EC4\u4EF6\u5927\u5BB6\u6CE8\u610F\u4E00\u4E0B\u3002</li></ul><h2 id="\u57FA\u4E8Etraefik\u81EA\u7814\u7684\u5FAE\u670D\u52A1\u7F51\u5173" tabindex="-1"><a class="header-anchor" href="#\u57FA\u4E8Etraefik\u81EA\u7814\u7684\u5FAE\u670D\u52A1\u7F51\u5173" aria-hidden="true">#</a> \u57FA\u4E8ETraefik\u81EA\u7814\u7684\u5FAE\u670D\u52A1\u7F51\u5173</h2><p>\u8FD9\u4E2A\u662F\u6211\u53F8\u81EA\u7814\u7684\u5FAE\u670D\u52A1\u7F51\u5173\uFF0C\u57FA\u4E8ETraefik\u8FDB\u884C\u5F00\u53D1\uFF0C\u4E0B\u9762\u4ECE\u6280\u672F\u9009\u578B\u3001\u7F51\u5173\u6846\u67B6\u3001\u7F51\u5173\u540E\u53F0\u3001\u534F\u8BAE\u8F6C\u6362\u8FDB\u884C\u8BB2\u89E3\uFF0C\u7EDD\u5BF9\u5E72\u8D27\uFF01</p><h3 id="\u6280\u672F\u6808\u9009\u578B" tabindex="-1"><a class="header-anchor" href="#\u6280\u672F\u6808\u9009\u578B" aria-hidden="true">#</a> \u6280\u672F\u6808\u9009\u578B</h3><ul><li><strong>Traefik</strong>\uFF1A\u4E00\u6B3E\u5F00\u6E90\u7684\u53CD\u5411\u4EE3\u7406\u4E0E\u8D1F\u8F7D\u5747\u8861\u5DE5\u5177\uFF0C\u5B83\u6700\u5927\u7684\u4F18\u70B9\u662F\u80FD\u591F\u4E0E\u5E38\u89C1\u7684\u5FAE\u670D\u52A1\u7CFB\u7EDF\u76F4\u63A5\u6574\u5408\uFF0C\u53EF\u4EE5\u5B9E\u73B0\u81EA\u52A8\u5316\u52A8\u6001\u914D\u7F6E\u3002traefik\u8F83\u4E3A\u8F7B\u91CF\uFF0C\u975E\u5E38\u6613\u4E8E\u4F7F\u7528\u548C\u8BBE\u7F6E\uFF0C\u6027\u80FD\u6BD4\u8F83\u597D\uFF0C\u5DF2\u5728\u5168\u7403\u8303\u56F4\u5185\u7528\u4E8E\u751F\u4EA7\u73AF\u5883\u3002</li><li><strong>Etcd</strong>\uFF1A\u4E00\u4E2AGo\u8A00\u7F16\u5199\u7684\u5206\u5E03\u5F0F\u3001\u9AD8\u53EF\u7528\u7684\u4E00\u81F4\u6027\u952E\u503C\u5B58\u50A8\u7CFB\u7EDF\uFF0C\u7528\u4E8E\u63D0\u4F9B\u53EF\u9760\u7684\u5206\u5E03\u5F0F\u952E\u503C\u5B58\u50A8\u3001\u914D\u7F6E\u5171\u4EAB\u548C\u670D\u52A1\u53D1\u73B0\u7B49\u529F\u80FD\u3002</li><li><strong>Go</strong>\uFF1A\u5E76\u53D1\u80FD\u529B\u5F3A\uFF0C\u6027\u80FD\u5AB2\u7F8EC\uFF0C\u5904\u7406\u80FD\u529B\u662FPHP\u76844\u500D\uFF0C\u6548\u7387\u9AD8\uFF0C\u8BED\u6CD5\u7B80\u5355\uFF0C\u6613\u4E0A\u624B\uFF0C\u5F00\u53D1\u6548\u7387\u63A5\u8FD1PHP\u3002</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-3567ace8-c7f3-4b5d-bf0f-9bb85fa8c439.png" alt=""></p><h3 id="\u7F51\u5173\u6846\u67B6" tabindex="-1"><a class="header-anchor" href="#\u7F51\u5173\u6846\u67B6" aria-hidden="true">#</a> \u7F51\u5173\u6846\u67B6</h3><p>\u6574\u4E2A\u7F51\u5173\u6846\u67B6\u5206\u4E3A3\u5757\uFF1A</p><ul><li><strong>\u7F51\u5173\u540E\u53F0</strong>\uFF08hal-fe\u548Chal-admin\uFF09\uFF1A\u7528\u4E8E\u5E94\u7528\u3001\u670D\u52A1\u548C\u63D2\u4EF6\u7684\u914D\u7F6E\uFF0C\u7136\u540E\u5C06\u914D\u7F6E\u4FE1\u606F\u53D1\u5E03\u5230ETCD\uFF1B</li><li><strong>Traefik</strong>\uFF1A\u8BFB\u53D6ETCD\u914D\u7F6E\uFF0C\u6839\u636E\u914D\u7F6E\u4FE1\u606F\u5BF9\u8BF7\u6C42\u8FDB\u884C\u8DEF\u7531\u5206\u53D1\uFF0C\u5982\u679C\u9700\u8981\u9274\u6743\uFF0C\u4F1A\u76F4\u63A5\u901A\u8FC7hal-agent\u6A21\u5757\u8FDB\u884C\u7EDF\u4E00\u9274\u6743\u3002\u9274\u6743\u5B8C\u6BD5\u540E\uFF0C\u5982\u679C\u662FHttp\u8BF7\u6C42\uFF0C\u76F4\u63A5\u6253\u5230\u4E0B\u6E38\u670D\u52A1\uFF0C\u5982\u679C\u662FGrpc\u548CThrift\u534F\u8BAE\uFF0C\u4F1A\u901A\u8FC7hal-proxy\u6A21\u5757\u8FDB\u884C\u534F\u8BAE\u8F6C\u6362\u3002</li><li><strong>\u534F\u8BAE\u8F6C\u6362\u6A21\u5757</strong>\uFF1A\u8BFB\u53D6ETCD\u914D\u7F6E\uFF0C\u5BF9Traefik\u5206\u53D1\u8FC7\u6765\u7684\u8BF7\u6C42\uFF0C\u8FDB\u884CGrpc\u548CThrift\u534F\u8BAE\u8F6C\u6362\uFF0C\u5E76\u901A\u8FC7\u670D\u52A1\u53D1\u73B0\u673A\u5236\uFF0C\u83B7\u53D6\u670D\u52A1\u4E0B\u6E38\u673A\u5668\uFF0C\u5E76\u901A\u8FC7\u8D1F\u8F7D\u5747\u8861\uFF0C\u5C06\u8F6C\u6362\u540E\u7684\u6570\u636E\u6253\u5230\u4E0B\u6E38\u670D\u52A1\u673A\u5668\u3002</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-45943e5f-2cca-45ff-9fb0-908e3cf7c990.png" alt=""></p><h3 id="\u7F51\u5173\u540E\u53F0" tabindex="-1"><a class="header-anchor" href="#\u7F51\u5173\u540E\u53F0" aria-hidden="true">#</a> \u7F51\u5173\u540E\u53F0</h3><p>\u4E3B\u8981\u75313\u5927\u6A21\u5757\u7EC4\u6210\uFF1A</p><ul><li><strong>\u5E94\u7528</strong>\uFF1A\u4E3B\u8981\u5305\u62EC\u5E94\u7528\u540D\u3001\u57DF\u540D\u3001\u8DEF\u5F84\u524D\u7F00\u3001\u6240\u5C5E\u7EC4\u3001\u72B6\u6001\u7B49\uFF0C\u6BD4\u5982\u5370\u5EA6\u6D77\u5916\u5546\u57CE\u3001\u5370\u5EA6\u793E\u533A\uFF1B</li><li><strong>\u670D\u52A1</strong>\uFF1A\u4E3B\u8981\u5305\u62EC\u670D\u52A1\u540D\u3001\u6CE8\u518C\u65B9\u5F0F\u3001\u534F\u8BAE\u7C7B\u578B\u3001\u6240\u5C5E\u7EC4\u3001\u72B6\u6001\u7B49\uFF0C\u6BD4\u5982\u8BC4\u8BBA\u670D\u52A1\u3001\u5730\u5740\u670D\u52A1\u3001\u641C\u7D22\u670D\u52A1\u3002</li><li><strong>\u63D2\u4EF6</strong>\uFF1A\u4E3B\u8981\u5305\u62EC\u63D2\u4EF6\u540D\u79F0\u3001\u63D2\u4EF6\u7C7B\u578B\u3001\u63D2\u4EF6\u5C5E\u6027\u914D\u7F6E\u7B49\uFF0C\u6BD4\u5982\u8DEF\u5F84\u524D\u7F00\u66FF\u6362\u63D2\u4EF6\u3001\u9274\u6743\u63D2\u4EF6\u3002</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-0b16b390-77b7-4fba-8529-7be31ba6335b.png" alt=""></p><p><strong>\u4E00\u4E2A\u5E94\u7528\u53EA\u80FD\u7ED1\u5B9A\u4E00\u4E2A\u670D\u52A1\uFF0C\u4F46\u662F\u53EF\u4EE5\u7ED1\u5B9A\u591A\u4E2A\u63D2\u4EF6\u3002</strong> \u901A\u8FC7\u540E\u53F0\u5B8C\u6210\u7F51\u5173\u914D\u7F6E\u540E\uFF0C\u5C06\u8FD9\u4E9B\u914D\u7F6E\u4FE1\u606F\u751F\u6210Config\u6587\u4EF6\uFF0C\u53D1\u5E03\u5230ETCD\u4E2D\uFF0CConfig\u6587\u4EF6\u9700\u8981\u9075\u5FAA\u4E25\u683C\u7684\u6570\u636E\u683C\u5F0F\uFF0C\u6BD4\u5982Traefix\u914D\u7F6E\u9700\u8981\u9075\u5FAA\u5B98\u65B9\u7684\u6587\u4EF6\u914D\u7F6E\u683C\u5F0F\uFF0C\u624D\u80FD\u88ABTraefik\u8BC6\u522B\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-299f8c95-d6a3-49d8-946d-5efed32faa29.png" alt=""></p><h3 id="\u534F\u8BAE\u8F6C\u6362\u6A21\u5757" tabindex="-1"><a class="header-anchor" href="#\u534F\u8BAE\u8F6C\u6362\u6A21\u5757" aria-hidden="true">#</a> \u534F\u8BAE\u8F6C\u6362\u6A21\u5757</h3><p>hal-proxy\u6A21\u5757\u662F\u6574\u4E2A\u5FAE\u670D\u52A1\u7F51\u5173\u6700\u590D\u6742\uFF0C\u4E5F\u662F\u6280\u672F\u542B\u91CF\u6700\u9AD8\u7684\u6A21\u5757\uFF0C\u6240\u4EE5\u7ED9\u5927\u5BB6\u8BE6\u7EC6\u8BB2\u89E3\u4E00\u4E0B\u3002</p><h4 id="\u95EE\u9898\u5F15\u5165" tabindex="-1"><a class="header-anchor" href="#\u95EE\u9898\u5F15\u5165" aria-hidden="true">#</a> \u95EE\u9898\u5F15\u5165</h4><p>\u5728\u8BB2\u8FD9\u4E2A\u6A21\u5757\u524D\uFF0C\u6211\u4EEC\u5148\u770B\u4E0B\u9762\u51E0\u4E2A\u95EE\u9898\uFF1A</p><ul><li>\u5F53\u8BF7\u6C42\u4ECE\u4E0A\u6E38\u7684trafik\u8FC7\u6765\u65F6\uFF0C\u9700\u8981\u77E5\u9053\u8BBF\u95EE\u4E0B\u6E38\u7684\u673A\u5668IP\u548C\u7AEF\u53E3\uFF0C\u624D\u80FD\u5C06\u8BF7\u6C42\u53D1\u9001\u7ED9\u4E0B\u6E38\uFF0C\u8FD9\u4E9B\u673A\u5668\u5982\u4F55\u83B7\u53D6\u5462\uFF1F</li><li>\u6709\u4E86\u673A\u5668\u540E\uFF0C\u6211\u4EEC\u9700\u8981\u548C\u4E0B\u6E38\u673A\u5668\u5EFA\u7ACB\u8FDE\u63A5\uFF0C\u5982\u679C\u8FDE\u63A5\u7528\u4E00\u6B21\u5C31\u76F4\u63A5\u91CA\u653E\uFF0C\u80AF\u5B9A\u5BF9\u670D\u52A1\u4F1A\u9020\u6210\u5F88\u5927\u7684\u538B\u529B\uFF0C\u8FD9\u5C31\u9700\u8981\u5F15\u5165Client\u7F13\u5B58\u6C60\uFF0C\u90A3\u8FD9\u4E2AClient\u7F13\u5B58\u6C60\u6211\u4EEC\u53C8\u8BE5\u5982\u4F55\u5B9E\u73B0\u5462\uFF1F</li><li>\u6700\u540E\u5C31\u662F\u9700\u8981\u5BF9\u534F\u8BAE\u8FDB\u884C\u8F6C\u6362\uFF0C\u56E0\u4E3A\u4E0D\u540C\u7684\u4E0B\u6E38\u670D\u52A1\uFF0C\u652F\u6301\u7684\u534F\u8BAE\u7C7B\u578B\u662F\u4E0D\u4E00\u6837\u7684\uFF0C\u8FD9\u4E2A\u7F51\u5173\u53C8\u662F\u5982\u4F55\u52A8\u6001\u652F\u6301\u7684\u5462\uFF1F</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-c2672067-0b21-41ba-807d-f59e0baf5b99.png" alt=""></p><h4 id="\u5B9E\u73B0\u539F\u7406" tabindex="-1"><a class="header-anchor" href="#\u5B9E\u73B0\u539F\u7406" aria-hidden="true">#</a> \u5B9E\u73B0\u539F\u7406</h4><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-e7f9c956-cdf2-4238-aeb3-372c61c1532f.png" 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index 00000000..028f43d3
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diff --git a/dist/assets/aqs.html.e6bd9611.js b/dist/assets/aqs.html.58976faa.js
similarity index 99%
rename from dist/assets/aqs.html.e6bd9611.js
rename to dist/assets/aqs.html.58976faa.js
index 2cb5766a..0685a024 100644
--- a/dist/assets/aqs.html.e6bd9611.js
+++ b/dist/assets/aqs.html.58976faa.js
@@ -1,4 +1,4 @@
-import{_ as p}from"./plugin-vue_export-helper.21dcd24c.js";import{r as t,o,c,a as n,b as a,e as l,d as e}from"./app.a0271b9c.js";const i={},u=l(`<h1 id="java\u5E76\u53D1aqs\u8BE6\u89E3" tabindex="-1"><a class="header-anchor" href="#java\u5E76\u53D1aqs\u8BE6\u89E3" aria-hidden="true">#</a> Java\u5E76\u53D1AQS\u8BE6\u89E3</h1><h2 id="aqs\u7B80\u4ECB" tabindex="-1"><a class="header-anchor" href="#aqs\u7B80\u4ECB" aria-hidden="true">#</a> AQS\u7B80\u4ECB</h2><p><strong>AQS</strong>\u662F<code>AbstractQueuedSynchronizer</code>\u7684\u7B80\u79F0\uFF0C\u5373<code>\u62BD\u8C61\u961F\u5217\u540C\u6B65\u5668</code>\uFF0C\u4ECE\u5B57\u9762\u610F\u601D\u4E0A\u7406\u89E3:</p><ul><li>\u62BD\u8C61\uFF1A\u62BD\u8C61\u7C7B\uFF0C\u53EA\u5B9E\u73B0\u4E00\u4E9B\u4E3B\u8981\u903B\u8F91\uFF0C\u6709\u4E9B\u65B9\u6CD5\u7531\u5B50\u7C7B\u5B9E\u73B0\uFF1B</li><li>\u961F\u5217\uFF1A\u4F7F\u7528\u5148\u8FDB\u5148\u51FA\uFF08FIFO\uFF09\u961F\u5217\u5B58\u50A8\u6570\u636E\uFF1B</li><li>\u540C\u6B65\uFF1A\u5B9E\u73B0\u4E86\u540C\u6B65\u7684\u529F\u80FD\u3002</li></ul><p>\u90A3AQS\u6709\u4EC0\u4E48\u7528\u5462\uFF1FAQS\u662F\u4E00\u4E2A\u7528\u6765\u6784\u5EFA\u9501\u548C\u540C\u6B65\u5668\u7684\u6846\u67B6\uFF0C\u4F7F\u7528AQS\u80FD\u7B80\u5355\u4E14\u9AD8\u6548\u5730\u6784\u9020\u51FA\u5E94\u7528\u5E7F\u6CDB\u7684\u540C\u6B65\u5668\uFF0C\u6BD4\u5982\u6211\u4EEC\u63D0\u5230\u7684ReentrantLock\uFF0CSemaphore\uFF0CReentrantReadWriteLock\uFF0CSynchronousQueue\uFF0CFutureTask\u7B49\u7B49\u7686\u662F\u57FA\u4E8EAQS\u7684\u3002</p><p>\u5F53\u7136\uFF0C\u6211\u4EEC\u81EA\u5DF1\u4E5F\u80FD\u5229\u7528AQS\u975E\u5E38\u8F7B\u677E\u5BB9\u6613\u5730\u6784\u9020\u51FA\u7B26\u5408\u6211\u4EEC\u81EA\u5DF1\u9700\u6C42\u7684\u540C\u6B65\u5668\uFF0C\u53EA\u8981\u5B50\u7C7B\u5B9E\u73B0\u5B83\u7684\u51E0\u4E2A<code>protected</code>\u65B9\u6CD5\u5C31\u53EF\u4EE5\u4E86\uFF0C\u5728\u4E0B\u6587\u4F1A\u6709\u8BE6\u7EC6\u7684\u4ECB\u7ECD\u3002</p><h2 id="aqs\u7684\u6570\u636E\u7ED3\u6784" tabindex="-1"><a class="header-anchor" href="#aqs\u7684\u6570\u636E\u7ED3\u6784" aria-hidden="true">#</a> AQS\u7684\u6570\u636E\u7ED3\u6784</h2><p>AQS\u5185\u90E8\u4F7F\u7528\u4E86\u4E00\u4E2Avolatile\u7684\u53D8\u91CFstate\u6765\u4F5C\u4E3A\u8D44\u6E90\u7684\u6807\u8BC6\u3002\u540C\u65F6\u5B9A\u4E49\u4E86\u51E0\u4E2A\u83B7\u53D6\u548C\u6539\u53D8state\u7684protected\u65B9\u6CD5\uFF0C\u5B50\u7C7B\u53EF\u4EE5\u8986\u76D6\u8FD9\u4E9B\u65B9\u6CD5\u6765\u5B9E\u73B0\u81EA\u5DF1\u7684\u903B\u8F91\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token function">getState</span><span class="token punctuation">(</span><span class="token punctuation">)</span>
+import{_ as p}from"./plugin-vue_export-helper.21dcd24c.js";import{r as t,o,c,a as n,b as a,e as l,d as e}from"./app.615e41d8.js";const i={},u=l(`<h1 id="java\u5E76\u53D1aqs\u8BE6\u89E3" tabindex="-1"><a class="header-anchor" href="#java\u5E76\u53D1aqs\u8BE6\u89E3" aria-hidden="true">#</a> Java\u5E76\u53D1AQS\u8BE6\u89E3</h1><h2 id="aqs\u7B80\u4ECB" tabindex="-1"><a class="header-anchor" href="#aqs\u7B80\u4ECB" aria-hidden="true">#</a> AQS\u7B80\u4ECB</h2><p><strong>AQS</strong>\u662F<code>AbstractQueuedSynchronizer</code>\u7684\u7B80\u79F0\uFF0C\u5373<code>\u62BD\u8C61\u961F\u5217\u540C\u6B65\u5668</code>\uFF0C\u4ECE\u5B57\u9762\u610F\u601D\u4E0A\u7406\u89E3:</p><ul><li>\u62BD\u8C61\uFF1A\u62BD\u8C61\u7C7B\uFF0C\u53EA\u5B9E\u73B0\u4E00\u4E9B\u4E3B\u8981\u903B\u8F91\uFF0C\u6709\u4E9B\u65B9\u6CD5\u7531\u5B50\u7C7B\u5B9E\u73B0\uFF1B</li><li>\u961F\u5217\uFF1A\u4F7F\u7528\u5148\u8FDB\u5148\u51FA\uFF08FIFO\uFF09\u961F\u5217\u5B58\u50A8\u6570\u636E\uFF1B</li><li>\u540C\u6B65\uFF1A\u5B9E\u73B0\u4E86\u540C\u6B65\u7684\u529F\u80FD\u3002</li></ul><p>\u90A3AQS\u6709\u4EC0\u4E48\u7528\u5462\uFF1FAQS\u662F\u4E00\u4E2A\u7528\u6765\u6784\u5EFA\u9501\u548C\u540C\u6B65\u5668\u7684\u6846\u67B6\uFF0C\u4F7F\u7528AQS\u80FD\u7B80\u5355\u4E14\u9AD8\u6548\u5730\u6784\u9020\u51FA\u5E94\u7528\u5E7F\u6CDB\u7684\u540C\u6B65\u5668\uFF0C\u6BD4\u5982\u6211\u4EEC\u63D0\u5230\u7684ReentrantLock\uFF0CSemaphore\uFF0CReentrantReadWriteLock\uFF0CSynchronousQueue\uFF0CFutureTask\u7B49\u7B49\u7686\u662F\u57FA\u4E8EAQS\u7684\u3002</p><p>\u5F53\u7136\uFF0C\u6211\u4EEC\u81EA\u5DF1\u4E5F\u80FD\u5229\u7528AQS\u975E\u5E38\u8F7B\u677E\u5BB9\u6613\u5730\u6784\u9020\u51FA\u7B26\u5408\u6211\u4EEC\u81EA\u5DF1\u9700\u6C42\u7684\u540C\u6B65\u5668\uFF0C\u53EA\u8981\u5B50\u7C7B\u5B9E\u73B0\u5B83\u7684\u51E0\u4E2A<code>protected</code>\u65B9\u6CD5\u5C31\u53EF\u4EE5\u4E86\uFF0C\u5728\u4E0B\u6587\u4F1A\u6709\u8BE6\u7EC6\u7684\u4ECB\u7ECD\u3002</p><h2 id="aqs\u7684\u6570\u636E\u7ED3\u6784" tabindex="-1"><a class="header-anchor" href="#aqs\u7684\u6570\u636E\u7ED3\u6784" aria-hidden="true">#</a> AQS\u7684\u6570\u636E\u7ED3\u6784</h2><p>AQS\u5185\u90E8\u4F7F\u7528\u4E86\u4E00\u4E2Avolatile\u7684\u53D8\u91CFstate\u6765\u4F5C\u4E3A\u8D44\u6E90\u7684\u6807\u8BC6\u3002\u540C\u65F6\u5B9A\u4E49\u4E86\u51E0\u4E2A\u83B7\u53D6\u548C\u6539\u53D8state\u7684protected\u65B9\u6CD5\uFF0C\u5B50\u7C7B\u53EF\u4EE5\u8986\u76D6\u8FD9\u4E9B\u65B9\u6CD5\u6765\u5B9E\u73B0\u81EA\u5DF1\u7684\u903B\u8F91\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token function">getState</span><span class="token punctuation">(</span><span class="token punctuation">)</span>
 <span class="token function">setState</span><span class="token punctuation">(</span><span class="token punctuation">)</span>
 <span class="token function">compareAndSetState</span><span class="token punctuation">(</span><span class="token punctuation">)</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>\u8FD9\u4E09\u79CD\u64CD\u4F5C\u5747\u662F\u539F\u5B50\u64CD\u4F5C\uFF0C\u5176\u4E2DcompareAndSetState\u7684\u5B9E\u73B0\u4F9D\u8D56\u4E8EUnsafe\u7684compareAndSwapInt()\u65B9\u6CD5\u3002</p><p>\u800CAQS\u7C7B\u672C\u8EAB\u5B9E\u73B0\u7684\u662F\u4E00\u4E9B\u6392\u961F\u548C\u963B\u585E\u7684\u673A\u5236\uFF0C\u6BD4\u5982\u5177\u4F53\u7EBF\u7A0B\u7B49\u5F85\u961F\u5217\u7684\u7EF4\u62A4\uFF08\u5982\u83B7\u53D6\u8D44\u6E90\u5931\u8D25\u5165\u961F/\u5524\u9192\u51FA\u961F\u7B49\uFF09\u3002\u5B83\u5185\u90E8\u4F7F\u7528\u4E86\u4E00\u4E2A\u5148\u8FDB\u5148\u51FA\uFF08FIFO\uFF09\u7684\u53CC\u7AEF\u961F\u5217\uFF0C\u5E76\u4F7F\u7528\u4E86\u4E24\u4E2A\u6307\u9488head\u548Ctail\u7528\u4E8E\u6807\u8BC6\u961F\u5217\u7684\u5934\u90E8\u548C\u5C3E\u90E8\u3002\u5176\u6570\u636E\u7ED3\u6784\u5982\u56FE\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/aqs-c294b5e3-69ef-49bb-ac56-f825894746ab.png" alt=""></p><p>\u4F46\u5B83\u5E76\u4E0D\u662F\u76F4\u63A5\u50A8\u5B58\u7EBF\u7A0B\uFF0C\u800C\u662F\u50A8\u5B58\u62E5\u6709\u7EBF\u7A0B\u7684Node\u8282\u70B9\u3002</p><h2 id="\u8D44\u6E90\u5171\u4EAB\u6A21\u5F0F" tabindex="-1"><a class="header-anchor" href="#\u8D44\u6E90\u5171\u4EAB\u6A21\u5F0F" aria-hidden="true">#</a> \u8D44\u6E90\u5171\u4EAB\u6A21\u5F0F</h2><p>\u8D44\u6E90\u6709\u4E24\u79CD\u5171\u4EAB\u6A21\u5F0F\uFF0C\u6216\u8005\u8BF4\u4E24\u79CD\u540C\u6B65\u65B9\u5F0F\uFF1A</p><ul><li>\u72EC\u5360\u6A21\u5F0F\uFF08Exclusive\uFF09\uFF1A\u8D44\u6E90\u662F\u72EC\u5360\u7684\uFF0C\u4E00\u6B21\u53EA\u80FD\u4E00\u4E2A\u7EBF\u7A0B\u83B7\u53D6\u3002\u5982ReentrantLock\u3002</li><li>\u5171\u4EAB\u6A21\u5F0F\uFF08Share\uFF09\uFF1A\u540C\u65F6\u53EF\u4EE5\u88AB\u591A\u4E2A\u7EBF\u7A0B\u83B7\u53D6\uFF0C\u5177\u4F53\u7684\u8D44\u6E90\u4E2A\u6570\u53EF\u4EE5\u901A\u8FC7\u53C2\u6570\u6307\u5B9A\u3002\u5982Semaphore/CountDownLatch\u3002</li></ul><p>\u4E00\u822C\u60C5\u51B5\u4E0B\uFF0C\u5B50\u7C7B\u53EA\u9700\u8981\u6839\u636E\u9700\u6C42\u5B9E\u73B0\u5176\u4E2D\u4E00\u79CD\u6A21\u5F0F\uFF0C\u5F53\u7136\u4E5F\u6709\u540C\u65F6\u5B9E\u73B0\u4E24\u79CD\u6A21\u5F0F\u7684\u540C\u6B65\u7C7B\uFF0C\u5982<code>ReadWriteLock</code>\u3002</p><p>AQS\u4E2D\u5173\u4E8E\u8FD9\u4E24\u79CD\u8D44\u6E90\u5171\u4EAB\u6A21\u5F0F\u7684\u5B9A\u4E49\u6E90\u7801\uFF08\u5747\u5728\u5185\u90E8\u7C7BNode\u4E2D\uFF09\u3002\u6211\u4EEC\u6765\u770B\u770BNode\u7684\u7ED3\u6784\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">static</span> <span class="token keyword">final</span> <span class="token keyword">class</span> <span class="token class-name">Node</span> <span class="token punctuation">{</span>
diff --git a/dist/assets/array.html.97a807b4.js b/dist/assets/array.html.19972859.js
similarity index 99%
rename from dist/assets/array.html.97a807b4.js
rename to dist/assets/array.html.19972859.js
index 33d79b88..1806237a 100644
--- a/dist/assets/array.html.97a807b4.js
+++ b/dist/assets/array.html.19972859.js
@@ -1,4 +1,4 @@
-import{_ as e}from"./plugin-vue_export-helper.21dcd24c.js";import{r as t,o,c,a as s,b as l,e as a,d as n}from"./app.a0271b9c.js";const i={},u=a(`<h1 id="\u6DF1\u5165\u7406\u89E3java\u6570\u7EC4" tabindex="-1"><a class="header-anchor" href="#\u6DF1\u5165\u7406\u89E3java\u6570\u7EC4" aria-hidden="true">#</a> \u6DF1\u5165\u7406\u89E3Java\u6570\u7EC4</h1><p>\u201C\u54E5\uFF0C\u6211\u770B\u4F60\u4E4B\u524D\u7684\u6587\u7AE0\u91CC\u63D0\u5230\uFF0CArrayList \u7684\u5185\u90E8\u662F\u7528\u6570\u7EC4\u5B9E\u73B0\u7684\uFF0C\u6211\u5C31\u5BF9\u6570\u7EC4\u975E\u5E38\u611F\u5174\u8DA3\uFF0C\u60F3\u6DF1\u5165\u5730\u4E86\u89E3\u4E00\u4E0B\uFF0C\u4ECA\u5929\u7EC8\u4E8E\u5230\u8FD9\u4E2A\u73AF\u8282\u4E86\uFF0C\u597D\u671F\u5F85\u5440\uFF01\u201D\u4E09\u59B9\u7684\u8BED\u6C14\u91CC\u663E\u5F97\u5F88\u5174\u594B\u3002</p><p>\u201C\u7684\u786E\u662F\u7684\uFF0C\u770B ArrayList \u7684\u6E90\u7801\u5C31\u4E00\u6E05\u4E8C\u695A\u4E86\u3002\u201D\u6211\u4E00\u8FB9\u8BF4\uFF0C\u4E00\u8FB9\u6253\u5F00 Intellij IDEA\uFF0C\u5E76\u627E\u5230\u4E86 ArrayList \u7684\u6E90\u7801\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token doc-comment comment">/**
+import{_ as e}from"./plugin-vue_export-helper.21dcd24c.js";import{r as t,o,c,a as s,b as l,e as a,d as n}from"./app.615e41d8.js";const i={},u=a(`<h1 id="\u6DF1\u5165\u7406\u89E3java\u6570\u7EC4" tabindex="-1"><a class="header-anchor" href="#\u6DF1\u5165\u7406\u89E3java\u6570\u7EC4" aria-hidden="true">#</a> \u6DF1\u5165\u7406\u89E3Java\u6570\u7EC4</h1><p>\u201C\u54E5\uFF0C\u6211\u770B\u4F60\u4E4B\u524D\u7684\u6587\u7AE0\u91CC\u63D0\u5230\uFF0CArrayList \u7684\u5185\u90E8\u662F\u7528\u6570\u7EC4\u5B9E\u73B0\u7684\uFF0C\u6211\u5C31\u5BF9\u6570\u7EC4\u975E\u5E38\u611F\u5174\u8DA3\uFF0C\u60F3\u6DF1\u5165\u5730\u4E86\u89E3\u4E00\u4E0B\uFF0C\u4ECA\u5929\u7EC8\u4E8E\u5230\u8FD9\u4E2A\u73AF\u8282\u4E86\uFF0C\u597D\u671F\u5F85\u5440\uFF01\u201D\u4E09\u59B9\u7684\u8BED\u6C14\u91CC\u663E\u5F97\u5F88\u5174\u594B\u3002</p><p>\u201C\u7684\u786E\u662F\u7684\uFF0C\u770B ArrayList \u7684\u6E90\u7801\u5C31\u4E00\u6E05\u4E8C\u695A\u4E86\u3002\u201D\u6211\u4E00\u8FB9\u8BF4\uFF0C\u4E00\u8FB9\u6253\u5F00 Intellij IDEA\uFF0C\u5E76\u627E\u5230\u4E86 ArrayList \u7684\u6E90\u7801\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token doc-comment comment">/**
  * The array buffer into which the elements of the ArrayList are stored.
  * The capacity of the ArrayList is the length of this array buffer. Any
  * empty ArrayList with elementData == DEFAULTCAPACITY_EMPTY_ELEMENTDATA
diff --git a/dist/assets/arraylist.html.804615c1.js b/dist/assets/arraylist.html.f57cbfa7.js
similarity index 99%
rename from dist/assets/arraylist.html.804615c1.js
rename to dist/assets/arraylist.html.f57cbfa7.js
index 50028893..0fc04ce1 100644
--- a/dist/assets/arraylist.html.804615c1.js
+++ b/dist/assets/arraylist.html.f57cbfa7.js
@@ -1,4 +1,4 @@
-import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e}from"./app.a0271b9c.js";const p={},t=e(`<h1 id="java\u96C6\u5408arraylist\u8BE6\u89E3" tabindex="-1"><a class="header-anchor" href="#java\u96C6\u5408arraylist\u8BE6\u89E3" aria-hidden="true">#</a> Java\u96C6\u5408ArrayList\u8BE6\u89E3</h1><p>\u201C\u4E8C\u54E5\uFF0C\u542C\u8BF4\u4ECA\u5929\u6211\u4EEC\u5F00\u8BB2 ArrayList \u4E86\uFF1F\u597D\u671F\u5F85\u54E6\uFF01\u201D\u4E09\u59B9\u660E\u77E5\u6545\u95EE\uFF0C\u8FD9\u4E2A\u6258\u914D\u5408\u5F97\u4F9D\u7136\u5929\u8863\u65E0\u7F1D\u3002</p><p>\u201C\u662F\u7684\u5440\uFF0C\u4E09\u59B9\u3002\u201D\u6211\u80AF\u5B9A\u5730\u70B9\u4E86\u70B9\u5934\uFF0C\u7EE7\u7EED\u8BF4\u9053\uFF0C\u201CArrayList \u53EF\u4EE5\u79F0\u5F97\u4E0A\u662F\u96C6\u5408\u6846\u67B6\u65B9\u9762\u6700\u5E38\u7528\u7684\u7C7B\u4E86\uFF0C\u53EF\u4EE5\u548C HashMap \u4E00\u8F83\u9AD8\u4E0B\u3002\u201D</p><p>\u4ECE\u540D\u5B57\u5C31\u53EF\u4EE5\u770B\u5F97\u51FA\u6765\uFF0CArrayList \u5B9E\u73B0\u4E86 List \u63A5\u53E3\uFF0C\u5E76\u4E14\u662F\u57FA\u4E8E\u6570\u7EC4\u5B9E\u73B0\u7684\u3002</p><p>\u6570\u7EC4\u7684\u5927\u5C0F\u662F\u56FA\u5B9A\u7684\uFF0C\u4E00\u65E6\u521B\u5EFA\u7684\u65F6\u5019\u6307\u5B9A\u4E86\u5927\u5C0F\uFF0C\u5C31\u4E0D\u80FD\u518D\u8C03\u6574\u4E86\u3002\u4E5F\u5C31\u662F\u8BF4\uFF0C\u5982\u679C\u6570\u7EC4\u6EE1\u4E86\uFF0C\u5C31\u4E0D\u80FD\u518D\u6DFB\u52A0\u4EFB\u4F55\u5143\u7D20\u4E86\u3002ArrayList \u5728\u6570\u7EC4\u7684\u57FA\u7840\u4E0A\u5B9E\u73B0\u4E86\u81EA\u52A8\u6269\u5BB9\uFF0C\u5E76\u4E14\u63D0\u4F9B\u4E86\u6BD4\u6570\u7EC4\u66F4\u4E30\u5BCC\u7684\u9884\u5B9A\u4E49\u65B9\u6CD5\uFF08\u5404\u79CD\u589E\u5220\u6539\u67E5\uFF09\uFF0C\u975E\u5E38\u7075\u6D3B\u3002</p><p>Java \u8FD9\u95E8\u7F16\u7A0B\u8BED\u8A00\u548C C\u8BED\u8A00\u7684\u4E0D\u540C\u4E4B\u5904\u5C31\u5728\u8FD9\u91CC\uFF0C\u5982\u679C\u662F C\u8BED\u8A00\u7684\u8BDD\uFF0C\u5C31\u5FC5\u987B\u52A8\u624B\u5B9E\u73B0\u81EA\u5DF1\u7684 ArrayList\uFF0C\u539F\u751F\u7684\u5E93\u51FD\u6570\u91CC\u9762\u662F\u6CA1\u6709\u7684\u3002</p><p>\u201C\u4E8C\u54E5\uFF0C<strong>\u5982\u4F55\u521B\u5EFA\u4E00\u4E2A ArrayList \u554A</strong>\uFF1F\u201D\u4E09\u59B9\u95EE\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">ArrayList</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">String</span><span class="token punctuation">&gt;</span></span> alist <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">ArrayList</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">String</span><span class="token punctuation">&gt;</span></span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
+import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e}from"./app.615e41d8.js";const p={},t=e(`<h1 id="java\u96C6\u5408arraylist\u8BE6\u89E3" tabindex="-1"><a class="header-anchor" href="#java\u96C6\u5408arraylist\u8BE6\u89E3" aria-hidden="true">#</a> Java\u96C6\u5408ArrayList\u8BE6\u89E3</h1><p>\u201C\u4E8C\u54E5\uFF0C\u542C\u8BF4\u4ECA\u5929\u6211\u4EEC\u5F00\u8BB2 ArrayList \u4E86\uFF1F\u597D\u671F\u5F85\u54E6\uFF01\u201D\u4E09\u59B9\u660E\u77E5\u6545\u95EE\uFF0C\u8FD9\u4E2A\u6258\u914D\u5408\u5F97\u4F9D\u7136\u5929\u8863\u65E0\u7F1D\u3002</p><p>\u201C\u662F\u7684\u5440\uFF0C\u4E09\u59B9\u3002\u201D\u6211\u80AF\u5B9A\u5730\u70B9\u4E86\u70B9\u5934\uFF0C\u7EE7\u7EED\u8BF4\u9053\uFF0C\u201CArrayList \u53EF\u4EE5\u79F0\u5F97\u4E0A\u662F\u96C6\u5408\u6846\u67B6\u65B9\u9762\u6700\u5E38\u7528\u7684\u7C7B\u4E86\uFF0C\u53EF\u4EE5\u548C HashMap \u4E00\u8F83\u9AD8\u4E0B\u3002\u201D</p><p>\u4ECE\u540D\u5B57\u5C31\u53EF\u4EE5\u770B\u5F97\u51FA\u6765\uFF0CArrayList \u5B9E\u73B0\u4E86 List \u63A5\u53E3\uFF0C\u5E76\u4E14\u662F\u57FA\u4E8E\u6570\u7EC4\u5B9E\u73B0\u7684\u3002</p><p>\u6570\u7EC4\u7684\u5927\u5C0F\u662F\u56FA\u5B9A\u7684\uFF0C\u4E00\u65E6\u521B\u5EFA\u7684\u65F6\u5019\u6307\u5B9A\u4E86\u5927\u5C0F\uFF0C\u5C31\u4E0D\u80FD\u518D\u8C03\u6574\u4E86\u3002\u4E5F\u5C31\u662F\u8BF4\uFF0C\u5982\u679C\u6570\u7EC4\u6EE1\u4E86\uFF0C\u5C31\u4E0D\u80FD\u518D\u6DFB\u52A0\u4EFB\u4F55\u5143\u7D20\u4E86\u3002ArrayList \u5728\u6570\u7EC4\u7684\u57FA\u7840\u4E0A\u5B9E\u73B0\u4E86\u81EA\u52A8\u6269\u5BB9\uFF0C\u5E76\u4E14\u63D0\u4F9B\u4E86\u6BD4\u6570\u7EC4\u66F4\u4E30\u5BCC\u7684\u9884\u5B9A\u4E49\u65B9\u6CD5\uFF08\u5404\u79CD\u589E\u5220\u6539\u67E5\uFF09\uFF0C\u975E\u5E38\u7075\u6D3B\u3002</p><p>Java \u8FD9\u95E8\u7F16\u7A0B\u8BED\u8A00\u548C C\u8BED\u8A00\u7684\u4E0D\u540C\u4E4B\u5904\u5C31\u5728\u8FD9\u91CC\uFF0C\u5982\u679C\u662F C\u8BED\u8A00\u7684\u8BDD\uFF0C\u5C31\u5FC5\u987B\u52A8\u624B\u5B9E\u73B0\u81EA\u5DF1\u7684 ArrayList\uFF0C\u539F\u751F\u7684\u5E93\u51FD\u6570\u91CC\u9762\u662F\u6CA1\u6709\u7684\u3002</p><p>\u201C\u4E8C\u54E5\uFF0C<strong>\u5982\u4F55\u521B\u5EFA\u4E00\u4E2A ArrayList \u554A</strong>\uFF1F\u201D\u4E09\u59B9\u95EE\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">ArrayList</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">String</span><span class="token punctuation">&gt;</span></span> alist <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">ArrayList</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">String</span><span class="token punctuation">&gt;</span></span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>\u53EF\u4EE5\u901A\u8FC7\u4E0A\u9762\u7684\u8BED\u53E5\u6765\u521B\u5EFA\u4E00\u4E2A\u5B57\u7B26\u4E32\u7C7B\u578B\u7684 ArrayList\uFF08\u901A\u8FC7\u5C16\u62EC\u53F7\u6765\u9650\u5B9A ArrayList \u4E2D\u5143\u7D20\u7684\u7C7B\u578B\uFF0C\u5982\u679C\u5C1D\u8BD5\u6DFB\u52A0\u5176\u4ED6\u7C7B\u578B\u7684\u5143\u7D20\uFF0C\u5C06\u4F1A\u4EA7\u751F\u7F16\u8BD1\u9519\u8BEF\uFF09\uFF0C\u66F4\u7B80\u5316\u7684\u5199\u6CD5\u5982\u4E0B\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">List</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">String</span><span class="token punctuation">&gt;</span></span> alist <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">ArrayList</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token punctuation">&gt;</span></span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>\u7531\u4E8E ArrayList \u5B9E\u73B0\u4E86 List \u63A5\u53E3\uFF0C\u6240\u4EE5 alist \u53D8\u91CF\u7684\u7C7B\u578B\u53EF\u4EE5\u662F List \u7C7B\u578B\uFF1Bnew \u5173\u952E\u5B57\u58F0\u660E\u540E\u7684\u5C16\u62EC\u53F7\u4E2D\u53EF\u4EE5\u4E0D\u518D\u6307\u5B9A\u5143\u7D20\u7684\u7C7B\u578B\uFF0C\u56E0\u4E3A\u7F16\u8BD1\u5668\u53EF\u4EE5\u901A\u8FC7\u524D\u9762\u5C16\u62EC\u53F7\u4E2D\u7684\u7C7B\u578B\u8FDB\u884C\u667A\u80FD\u63A8\u65AD\u3002</p><p>\u5982\u679C\u975E\u5E38\u786E\u5B9A ArrayList \u4E2D\u5143\u7D20\u7684\u4E2A\u6570\uFF0C\u5728\u521B\u5EFA\u7684\u65F6\u5019\u8FD8\u53EF\u4EE5\u6307\u5B9A\u521D\u59CB\u5927\u5C0F\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">List</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">String</span><span class="token punctuation">&gt;</span></span> alist <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">ArrayList</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token punctuation">&gt;</span></span><span class="token punctuation">(</span><span class="token number">20</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>\u8FD9\u6837\u505A\u7684\u597D\u5904\u662F\uFF0C\u53EF\u4EE5\u6709\u6548\u5730\u907F\u514D\u5728\u6DFB\u52A0\u65B0\u7684\u5143\u7D20\u65F6\u8FDB\u884C\u4E0D\u5FC5\u8981\u7684\u6269\u5BB9\u3002\u4F46\u901A\u5E38\u60C5\u51B5\u4E0B\uFF0C\u6211\u4EEC\u5F88\u96BE\u786E\u5B9A ArrayList \u4E2D\u5143\u7D20\u7684\u4E2A\u6570\uFF0C\u56E0\u6B64\u4E00\u822C\u4E0D\u6307\u5B9A\u521D\u59CB\u5927\u5C0F\u3002</p><p>\u201C\u4E8C\u54E5\uFF0C<strong>\u90A3\u600E\u4E48\u5411 ArrayList \u4E2D\u6DFB\u52A0\u4E00\u4E2A\u5143\u7D20\u5462</strong>\uFF1F\u201D\u4E09\u59B9\u7EE7\u7EED\u95EE\u3002</p><p>\u53EF\u4EE5\u901A\u8FC7 <code>add()</code> \u65B9\u6CD5\u5411 ArrayList \u4E2D\u6DFB\u52A0\u4E00\u4E2A\u5143\u7D20\uFF0C\u5982\u679C\u4E0D\u6307\u5B9A\u4E0B\u6807\u7684\u8BDD\uFF0C\u5C31\u9ED8\u8BA4\u6DFB\u52A0\u5728\u672B\u5C3E\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code>alist<span class="token punctuation">.</span><span class="token function">add</span><span class="token punctuation">(</span><span class="token string">&quot;\u6C89\u9ED8\u738B\u4E8C&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
diff --git a/dist/assets/arrays.html.13de83ef.js b/dist/assets/arrays.html.ea4b1150.js
similarity index 99%
rename from dist/assets/arrays.html.13de83ef.js
rename to dist/assets/arrays.html.ea4b1150.js
index f5a95180..ced16fde 100644
--- a/dist/assets/arrays.html.13de83ef.js
+++ b/dist/assets/arrays.html.ea4b1150.js
@@ -1,4 +1,4 @@
-import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e as t}from"./app.a0271b9c.js";const p={},e=t(`<h1 id="java-arrays\u5DE5\u5177\u7C7B10\u5927\u5E38\u7528\u65B9\u6CD5" tabindex="-1"><a class="header-anchor" href="#java-arrays\u5DE5\u5177\u7C7B10\u5927\u5E38\u7528\u65B9\u6CD5" aria-hidden="true">#</a> Java Arrays\u5DE5\u5177\u7C7B10\u5927\u5E38\u7528\u65B9\u6CD5</h1><p>\u201C\u54E5\uFF0C\u6570\u7EC4\u4E13\u7528\u5DE5\u5177\u7C7B\u662F\u4E13\u95E8\u7528\u6765\u64CD\u4F5C\u6570\u7EC4\u7684\u5417\uFF1F\u6BD4\u5982\u8BF4\u521B\u5EFA\u6570\u7EC4\u3001\u6570\u7EC4\u6392\u5E8F\u3001\u6570\u7EC4\u68C0\u7D22\u7B49\u7B49\u3002\u201D\u4E09\u59B9\u7684\u63D0\u95EE\u5176\u5B9E\u5DF2\u7ECF\u628A\u7B54\u6848\u8BF4\u4E86\u51FA\u6765\u3002</p><p>\u201C\u662F\u6EF4\uFF0C\u8FD9\u91CC\u8BF4\u7684\u6570\u7EC4\u4E13\u7528\u5DE5\u5177\u7C7B\u6307\u7684\u662F <code>java.util.Arrays</code> \u7C7B\uFF0C\u57FA\u672C\u4E0A\u5E38\u89C1\u7684\u6570\u7EC4\u64CD\u4F5C\uFF0C\u8FD9\u4E2A\u7C7B\u90FD\u63D0\u4F9B\u4E86\u9759\u6001\u65B9\u6CD5\u53EF\u4F9B\u76F4\u63A5\u8C03\u7528\u3002\u6BD5\u7ADF\u6570\u7EC4\u672C\u8EAB\u60F3\u5B8C\u6210\u8FD9\u4E9B\u64CD\u4F5C\u8FD8\u662F\u633A\u9EBB\u70E6\u7684\uFF0C\u6709\u4E86\u8FD9\u5C42\u5C01\u88C5\uFF0C\u5C31\u65B9\u4FBF\u591A\u4E86\u3002\u201D\u5728\u56DE\u7B54\u4E09\u59B9\u7684\u540C\u65F6\uFF0C\u6211\u6253\u5F00 Intellij IDEA\uFF0C\u627E\u5230\u4E86 Arrays \u7C7B\u7684\u6E90\u7801\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">package</span> <span class="token namespace">java<span class="token punctuation">.</span>util</span><span class="token punctuation">;</span>
+import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e as t}from"./app.615e41d8.js";const p={},e=t(`<h1 id="java-arrays\u5DE5\u5177\u7C7B10\u5927\u5E38\u7528\u65B9\u6CD5" tabindex="-1"><a class="header-anchor" href="#java-arrays\u5DE5\u5177\u7C7B10\u5927\u5E38\u7528\u65B9\u6CD5" aria-hidden="true">#</a> Java Arrays\u5DE5\u5177\u7C7B10\u5927\u5E38\u7528\u65B9\u6CD5</h1><p>\u201C\u54E5\uFF0C\u6570\u7EC4\u4E13\u7528\u5DE5\u5177\u7C7B\u662F\u4E13\u95E8\u7528\u6765\u64CD\u4F5C\u6570\u7EC4\u7684\u5417\uFF1F\u6BD4\u5982\u8BF4\u521B\u5EFA\u6570\u7EC4\u3001\u6570\u7EC4\u6392\u5E8F\u3001\u6570\u7EC4\u68C0\u7D22\u7B49\u7B49\u3002\u201D\u4E09\u59B9\u7684\u63D0\u95EE\u5176\u5B9E\u5DF2\u7ECF\u628A\u7B54\u6848\u8BF4\u4E86\u51FA\u6765\u3002</p><p>\u201C\u662F\u6EF4\uFF0C\u8FD9\u91CC\u8BF4\u7684\u6570\u7EC4\u4E13\u7528\u5DE5\u5177\u7C7B\u6307\u7684\u662F <code>java.util.Arrays</code> \u7C7B\uFF0C\u57FA\u672C\u4E0A\u5E38\u89C1\u7684\u6570\u7EC4\u64CD\u4F5C\uFF0C\u8FD9\u4E2A\u7C7B\u90FD\u63D0\u4F9B\u4E86\u9759\u6001\u65B9\u6CD5\u53EF\u4F9B\u76F4\u63A5\u8C03\u7528\u3002\u6BD5\u7ADF\u6570\u7EC4\u672C\u8EAB\u60F3\u5B8C\u6210\u8FD9\u4E9B\u64CD\u4F5C\u8FD8\u662F\u633A\u9EBB\u70E6\u7684\uFF0C\u6709\u4E86\u8FD9\u5C42\u5C01\u88C5\uFF0C\u5C31\u65B9\u4FBF\u591A\u4E86\u3002\u201D\u5728\u56DE\u7B54\u4E09\u59B9\u7684\u540C\u65F6\uFF0C\u6211\u6253\u5F00 Intellij IDEA\uFF0C\u627E\u5230\u4E86 Arrays \u7C7B\u7684\u6E90\u7801\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">package</span> <span class="token namespace">java<span class="token punctuation">.</span>util</span><span class="token punctuation">;</span>
 <span class="token doc-comment comment">/**
  * <span class="token keyword">@author</span> Josh Bloch
  * <span class="token keyword">@author</span> Neal Gafter
diff --git a/dist/assets/asm.html.deedcff5.js b/dist/assets/asm.html.43e7fd57.js
similarity index 99%
rename from dist/assets/asm.html.deedcff5.js
rename to dist/assets/asm.html.43e7fd57.js
index 9094d308..b399b582 100644
--- a/dist/assets/asm.html.deedcff5.js
+++ b/dist/assets/asm.html.43e7fd57.js
@@ -1,4 +1,4 @@
-import{_ as i}from"./plugin-vue_export-helper.21dcd24c.js";import{r as l,o as t,c,a as n,b as d,e as a,d as s}from"./app.a0271b9c.js";const o={},p=a('<h1 id="\u53F2\u4E0A\u6700\u901A\u4FD7\u6613\u61C2\u7684asm\u6559\u7A0B" tabindex="-1"><a class="header-anchor" href="#\u53F2\u4E0A\u6700\u901A\u4FD7\u6613\u61C2\u7684asm\u6559\u7A0B" aria-hidden="true">#</a> \u53F2\u4E0A\u6700\u901A\u4FD7\u6613\u61C2\u7684ASM\u6559\u7A0B</h1><h2 id="\u4E00\u52FA\u601D\u60F3" tabindex="-1"><a class="header-anchor" href="#\u4E00\u52FA\u601D\u60F3" aria-hidden="true">#</a> \u4E00\u52FA\u601D\u60F3</h2><p>We are all in the gutter, but some of us are looking at the stars. \uFF08\u6211\u4EEC\u90FD\u751F\u6D3B\u5728\u9634\u6C9F\u91CC\uFF0C\u4F46\u4ECD\u6709\u4EBA\u4EF0\u671B\u661F\u7A7A \uFF09- \u738B\u5C14\u5FB7 \u300A\u6E29\u5FB7\u7C73\u5C14\u592B\u4EBA\u7684\u6247\u5B50\u300B</p><p>\u4E3E\u4E16\u6DF7\u6D4A\u6211\u72EC\u6E05\uFF0C\u4F17\u4EBA\u7686\u9189\u6211\u72EC\u9192 - \u5C48\u539F \u300A\u695A\u8F9E\u300B</p><h2 id="\u524D\u8A00" tabindex="-1"><a class="header-anchor" href="#\u524D\u8A00" aria-hidden="true">#</a> \u524D\u8A00</h2><p>ASM\u662F\u4E00\u79CD\u901A\u7528Java\u5B57\u8282\u7801\u64CD\u4F5C\u548C\u5206\u6790\u6846\u67B6\u3002\u5B83\u53EF\u4EE5\u7528\u4E8E\u4FEE\u6539\u73B0\u6709\u7684class\u6587\u4EF6\u6216\u52A8\u6001\u751F\u6210class\u6587\u4EF6\u3002</p>',6),u=s("**ASM\xA0**is an all purpose Java bytecode manipulation and analysis framework. It can be used to modify existing classes or to dynamically generate classes, directly in binary form. ASM provides some common bytecode transformations and analysis algorithms from which custom complex transformations and code analysis tools can be built. ASM offers similar functionality as other Java bytecode frameworks, but is focused on"),r={href:"https://asm.ow2.io/performance.html",target:"_blank",rel:"noopener noreferrer"},v=s("performance"),m=s(". Because it was designed and implemented to be as small and as fast as possible, it is well suited for use in dynamic systems (but can of course be used in a static way too, e.g. in compilers)."),b=a(`<p>\u672C\u7BC7\u6587\u7AE0\u5206\u4EAB\u7684\u662F\u5BF9ASM\u7684\u7406\u89E3\u548C\u5E94\u7528\uFF0C\u4E4B\u524D\u9700\u8981\u6211\u4EEC\u638C\u63E1<strong>class\u5B57\u8282\u7801</strong>\uFF0C<strong>JVM\u57FA\u4E8E\u6808\u7684\u8BBE\u8BA1\u6A21\u5F0F,JVM\u6307\u4EE4</strong></p><h2 id="class\u5B57\u8282\u7801" tabindex="-1"><a class="header-anchor" href="#class\u5B57\u8282\u7801" aria-hidden="true">#</a> class\u5B57\u8282\u7801</h2><p>\u6211\u4EEC\u7F16\u5199\u7684java\u6587\u4EF6\uFF0C\u4F1A\u901A\u8FC7javac\u547D\u4EE4\u7F16\u8BD1\u4E3Aclass\u6587\u4EF6\uFF0CJVM\u6700\u7EC8\u4F1A\u6267\u884C\u8BE5\u7C7B\u578B\u6587\u4EF6\u6765\u8FD0\u884C\u7A0B\u5E8F\u3002\u4E0B\u56FE\u6240\u793A\u4E3Aclass\u6587\u4EF6\u7ED3\u6784\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/asm-43844b78-c01f-4990-b038-3c91ff2eeb34.jpg" alt=""></p><p>\u4E0B\u9762\u6211\u4EEC\u901A\u8FC7\u4E00\u4E2A\u7B80\u5355\u7684\u5B9E\u4F8B\u6765\u8FDB\u884C\u8BF4\u660E\u3002\u4E0B\u9762\u662F\u6211\u4EEC\u7F16\u5199\u7684\u4E00\u4E2A\u7B80\u5355\u7684java\u6587\u4EF6\uFF0C\u53EA\u662F\u7B80\u5355\u7684\u51FD\u6570\u8C03\u7528.</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">Test</span> <span class="token punctuation">{</span>
+import{_ as i}from"./plugin-vue_export-helper.21dcd24c.js";import{r as l,o as t,c,a as n,b as d,e as a,d as s}from"./app.615e41d8.js";const o={},p=a('<h1 id="\u53F2\u4E0A\u6700\u901A\u4FD7\u6613\u61C2\u7684asm\u6559\u7A0B" tabindex="-1"><a class="header-anchor" href="#\u53F2\u4E0A\u6700\u901A\u4FD7\u6613\u61C2\u7684asm\u6559\u7A0B" aria-hidden="true">#</a> \u53F2\u4E0A\u6700\u901A\u4FD7\u6613\u61C2\u7684ASM\u6559\u7A0B</h1><h2 id="\u4E00\u52FA\u601D\u60F3" tabindex="-1"><a class="header-anchor" href="#\u4E00\u52FA\u601D\u60F3" aria-hidden="true">#</a> \u4E00\u52FA\u601D\u60F3</h2><p>We are all in the gutter, but some of us are looking at the stars. \uFF08\u6211\u4EEC\u90FD\u751F\u6D3B\u5728\u9634\u6C9F\u91CC\uFF0C\u4F46\u4ECD\u6709\u4EBA\u4EF0\u671B\u661F\u7A7A \uFF09- \u738B\u5C14\u5FB7 \u300A\u6E29\u5FB7\u7C73\u5C14\u592B\u4EBA\u7684\u6247\u5B50\u300B</p><p>\u4E3E\u4E16\u6DF7\u6D4A\u6211\u72EC\u6E05\uFF0C\u4F17\u4EBA\u7686\u9189\u6211\u72EC\u9192 - \u5C48\u539F \u300A\u695A\u8F9E\u300B</p><h2 id="\u524D\u8A00" tabindex="-1"><a class="header-anchor" href="#\u524D\u8A00" aria-hidden="true">#</a> \u524D\u8A00</h2><p>ASM\u662F\u4E00\u79CD\u901A\u7528Java\u5B57\u8282\u7801\u64CD\u4F5C\u548C\u5206\u6790\u6846\u67B6\u3002\u5B83\u53EF\u4EE5\u7528\u4E8E\u4FEE\u6539\u73B0\u6709\u7684class\u6587\u4EF6\u6216\u52A8\u6001\u751F\u6210class\u6587\u4EF6\u3002</p>',6),u=s("**ASM\xA0**is an all purpose Java bytecode manipulation and analysis framework. It can be used to modify existing classes or to dynamically generate classes, directly in binary form. ASM provides some common bytecode transformations and analysis algorithms from which custom complex transformations and code analysis tools can be built. ASM offers similar functionality as other Java bytecode frameworks, but is focused on"),r={href:"https://asm.ow2.io/performance.html",target:"_blank",rel:"noopener noreferrer"},v=s("performance"),m=s(". Because it was designed and implemented to be as small and as fast as possible, it is well suited for use in dynamic systems (but can of course be used in a static way too, e.g. in compilers)."),b=a(`<p>\u672C\u7BC7\u6587\u7AE0\u5206\u4EAB\u7684\u662F\u5BF9ASM\u7684\u7406\u89E3\u548C\u5E94\u7528\uFF0C\u4E4B\u524D\u9700\u8981\u6211\u4EEC\u638C\u63E1<strong>class\u5B57\u8282\u7801</strong>\uFF0C<strong>JVM\u57FA\u4E8E\u6808\u7684\u8BBE\u8BA1\u6A21\u5F0F,JVM\u6307\u4EE4</strong></p><h2 id="class\u5B57\u8282\u7801" tabindex="-1"><a class="header-anchor" href="#class\u5B57\u8282\u7801" aria-hidden="true">#</a> class\u5B57\u8282\u7801</h2><p>\u6211\u4EEC\u7F16\u5199\u7684java\u6587\u4EF6\uFF0C\u4F1A\u901A\u8FC7javac\u547D\u4EE4\u7F16\u8BD1\u4E3Aclass\u6587\u4EF6\uFF0CJVM\u6700\u7EC8\u4F1A\u6267\u884C\u8BE5\u7C7B\u578B\u6587\u4EF6\u6765\u8FD0\u884C\u7A0B\u5E8F\u3002\u4E0B\u56FE\u6240\u793A\u4E3Aclass\u6587\u4EF6\u7ED3\u6784\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/asm-43844b78-c01f-4990-b038-3c91ff2eeb34.jpg" alt=""></p><p>\u4E0B\u9762\u6211\u4EEC\u901A\u8FC7\u4E00\u4E2A\u7B80\u5355\u7684\u5B9E\u4F8B\u6765\u8FDB\u884C\u8BF4\u660E\u3002\u4E0B\u9762\u662F\u6211\u4EEC\u7F16\u5199\u7684\u4E00\u4E2A\u7B80\u5355\u7684java\u6587\u4EF6\uFF0C\u53EA\u662F\u7B80\u5355\u7684\u51FD\u6570\u8C03\u7528.</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">Test</span> <span class="token punctuation">{</span>
     <span class="token keyword">private</span> <span class="token keyword">int</span> num1 <span class="token operator">=</span> <span class="token number">1</span><span class="token punctuation">;</span>
     <span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">int</span> NUM1 <span class="token operator">=</span> <span class="token number">100</span><span class="token punctuation">;</span>
     <span class="token keyword">public</span> <span class="token keyword">int</span> <span class="token function">func</span><span class="token punctuation">(</span><span class="token keyword">int</span> a<span class="token punctuation">,</span><span class="token keyword">int</span> b<span class="token punctuation">)</span><span class="token punctuation">{</span>
diff --git a/dist/assets/atomic.html.1dc322e5.js b/dist/assets/atomic.html.08ec5c1f.js
similarity index 99%
rename from dist/assets/atomic.html.1dc322e5.js
rename to dist/assets/atomic.html.08ec5c1f.js
index cfab17c1..86f2fec3 100644
--- a/dist/assets/atomic.html.1dc322e5.js
+++ b/dist/assets/atomic.html.08ec5c1f.js
@@ -1,4 +1,4 @@
-import{_ as t}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o,c,a as n,b as a,e as l,d as e}from"./app.a0271b9c.js";const i={},u=l(`<h2 id="\u539F\u5B50\u64CD\u4F5C\u7C7B\u4ECB\u7ECD" tabindex="-1"><a class="header-anchor" href="#\u539F\u5B50\u64CD\u4F5C\u7C7B\u4ECB\u7ECD" aria-hidden="true">#</a> \u539F\u5B50\u64CD\u4F5C\u7C7B\u4ECB\u7ECD</h2><p>\u5728\u5E76\u53D1\u7F16\u7A0B\u4E2D\u5F88\u5BB9\u6613\u51FA\u73B0\u5E76\u53D1\u5B89\u5168\u7684\u95EE\u9898\uFF0C\u6709\u4E00\u4E2A\u5F88\u7B80\u5355\u7684\u4F8B\u5B50\u5C31\u662F\u591A\u7EBF\u7A0B\u66F4\u65B0\u53D8\u91CFi=1,\u6BD4\u5982\u591A\u4E2A\u7EBF\u7A0B\u6267\u884Ci++\u64CD\u4F5C\uFF0C\u5C31\u6709\u53EF\u80FD\u83B7\u53D6\u4E0D\u5230\u6B63\u786E\u7684\u503C\uFF0C\u800C\u8FD9\u4E2A\u95EE\u9898\uFF0C\u6700\u5E38\u7528\u7684\u65B9\u6CD5\u662F\u901A\u8FC7Synchronized\u8FDB\u884C\u63A7\u5236\u6765\u8FBE\u5230\u7EBF\u7A0B\u5B89\u5168\u7684\u76EE\u7684\u3002</p><p>\u4F46\u662F\u7531\u4E8Esynchronized\u662F\u91C7\u7528\u7684\u662F\u60B2\u89C2\u9501\u7B56\u7565\uFF0C\u5E76\u4E0D\u662F\u7279\u522B\u9AD8\u6548\u7684\u4E00\u79CD\u89E3\u51B3\u65B9\u6848\u3002\u5B9E\u9645\u4E0A\uFF0C\u5728J.U.C\u4E0B\u7684atomic\u5305\u63D0\u4F9B\u4E86\u4E00\u7CFB\u5217\u7684\u64CD\u4F5C\u7B80\u5355\uFF0C\u6027\u80FD\u9AD8\u6548\uFF0C\u5E76\u80FD\u4FDD\u8BC1\u7EBF\u7A0B\u5B89\u5168\u7684\u7C7B\u53BB\u66F4\u65B0\u57FA\u672C\u7C7B\u578B\u53D8\u91CF\uFF0C\u6570\u7EC4\u5143\u7D20\uFF0C\u5F15\u7528\u7C7B\u578B\u4EE5\u53CA\u66F4\u65B0\u5BF9\u8C61\u4E2D\u7684\u5B57\u6BB5\u7C7B\u578B\u3002atomic\u5305\u4E0B\u7684\u8FD9\u4E9B\u7C7B\u90FD\u662F\u91C7\u7528\u7684\u662F\u4E50\u89C2\u9501\u7B56\u7565\u53BB\u539F\u5B50\u66F4\u65B0\u6570\u636E\uFF0C\u5728java\u4E2D\u5219\u662F\u4F7F\u7528CAS\u64CD\u4F5C\u5177\u4F53\u5B9E\u73B0\u3002</p><h2 id="\u9884\u5907\u77E5\u8BC6-cas\u64CD\u4F5C" tabindex="-1"><a class="header-anchor" href="#\u9884\u5907\u77E5\u8BC6-cas\u64CD\u4F5C" aria-hidden="true">#</a> \u9884\u5907\u77E5\u8BC6--CAS\u64CD\u4F5C</h2><p>\u80FD\u591F\u5F04\u61C2atomic\u5305\u4E0B\u8FD9\u4E9B\u539F\u5B50\u64CD\u4F5C\u7C7B\u7684\u5B9E\u73B0\u539F\u7406\uFF0C\u5C31\u8981\u5148\u660E\u767D\u4EC0\u4E48\u662FCAS\u64CD\u4F5C\u3002</p><blockquote><p>\u4EC0\u4E48\u662FCAS?</p></blockquote><p>\u4F7F\u7528\u9501\u65F6\uFF0C\u7EBF\u7A0B\u83B7\u53D6\u9501\u662F\u4E00\u79CD\u60B2\u89C2\u9501\u7B56\u7565\uFF0C\u5373\u5047\u8BBE\u6BCF\u4E00\u6B21\u6267\u884C\u4E34\u754C\u533A\u4EE3\u7801\u90FD\u4F1A\u4EA7\u751F\u51B2\u7A81\uFF0C\u6240\u4EE5\u5F53\u524D\u7EBF\u7A0B\u83B7\u53D6\u5230\u9501\u7684\u65F6\u5019\u540C\u65F6\u4E5F\u4F1A\u963B\u585E\u5176\u4ED6\u7EBF\u7A0B\u83B7\u53D6\u8BE5\u9501\u3002\u800CCAS\u64CD\u4F5C\uFF08\u53C8\u79F0\u4E3A\u65E0\u9501\u64CD\u4F5C\uFF09\u662F\u4E00\u79CD\u4E50\u89C2\u9501\u7B56\u7565\uFF0C\u5B83\u5047\u8BBE\u6240\u6709\u7EBF\u7A0B\u8BBF\u95EE\u5171\u4EAB\u8D44\u6E90\u7684\u65F6\u5019\u4E0D\u4F1A\u51FA\u73B0\u51B2\u7A81\uFF0C\u65E2\u7136\u4E0D\u4F1A\u51FA\u73B0\u51B2\u7A81\u81EA\u7136\u800C\u7136\u5C31\u4E0D\u4F1A\u963B\u585E\u5176\u4ED6\u7EBF\u7A0B\u7684\u64CD\u4F5C\u3002\u56E0\u6B64\uFF0C\u7EBF\u7A0B\u5C31\u4E0D\u4F1A\u51FA\u73B0\u963B\u585E\u505C\u987F\u7684\u72B6\u6001\u3002\u90A3\u4E48\uFF0C\u5982\u679C\u51FA\u73B0\u51B2\u7A81\u4E86\u600E\u4E48\u529E\uFF1F\u65E0\u9501\u64CD\u4F5C\u662F\u4F7F\u7528CAS(compare and swap)\u53C8\u53EB\u505A\u6BD4\u8F83\u4EA4\u6362\u6765\u9274\u522B\u7EBF\u7A0B\u662F\u5426\u51FA\u73B0\u51B2\u7A81\uFF0C\u51FA\u73B0\u51B2\u7A81\u5C31\u91CD\u8BD5\u5F53\u524D\u64CD\u4F5C\u76F4\u5230\u6CA1\u6709\u51B2\u7A81\u4E3A\u6B62\u3002</p><blockquote><p>CAS\u7684\u64CD\u4F5C\u8FC7\u7A0B</p></blockquote><p>CAS\u6BD4\u8F83\u4EA4\u6362\u7684\u8FC7\u7A0B\u53EF\u4EE5\u901A\u4FD7\u7684\u7406\u89E3\u4E3ACAS(V,O,N)\uFF0C\u5305\u542B\u4E09\u4E2A\u503C\u5206\u522B\u4E3A\uFF1AV \u5185\u5B58\u5730\u5740\u5B58\u653E\u7684\u5B9E\u9645\u503C\uFF1BO \u9884\u671F\u7684\u503C\uFF08\u65E7\u503C\uFF09\uFF1BN \u66F4\u65B0\u7684\u65B0\u503C\u3002\u5F53V\u548CO\u76F8\u540C\u65F6\uFF0C\u4E5F\u5C31\u662F\u8BF4\u65E7\u503C\u548C\u5185\u5B58\u4E2D\u5B9E\u9645\u7684\u503C\u76F8\u540C\u8868\u660E\u8BE5\u503C\u6CA1\u6709\u88AB\u5176\u4ED6\u7EBF\u7A0B\u66F4\u6539\u8FC7\uFF0C\u5373\u8BE5\u65E7\u503CO\u5C31\u662F\u76EE\u524D\u6765\u8BF4\u6700\u65B0\u7684\u503C\u4E86\uFF0C\u81EA\u7136\u800C\u7136\u53EF\u4EE5\u5C06\u65B0\u503CN\u8D4B\u503C\u7ED9V\u3002\u53CD\u4E4B\uFF0CV\u548CO\u4E0D\u76F8\u540C\uFF0C\u8868\u660E\u8BE5\u503C\u5DF2\u7ECF\u88AB\u5176\u4ED6\u7EBF\u7A0B\u6539\u8FC7\u4E86\u5219\u8BE5\u65E7\u503CO\u4E0D\u662F\u6700\u65B0\u7248\u672C\u7684\u503C\u4E86\uFF0C\u6240\u4EE5\u4E0D\u80FD\u5C06\u65B0\u503CN\u8D4B\u7ED9V\uFF0C\u8FD4\u56DEV\u5373\u53EF\u3002\u5F53\u591A\u4E2A\u7EBF\u7A0B\u4F7F\u7528CAS\u64CD\u4F5C\u4E00\u4E2A\u53D8\u91CF\u662F\uFF0C\u53EA\u6709\u4E00\u4E2A\u7EBF\u7A0B\u4F1A\u6210\u529F\uFF0C\u5E76\u6210\u529F\u66F4\u65B0\uFF0C\u5176\u4F59\u4F1A\u5931\u8D25\u3002\u5931\u8D25\u7684\u7EBF\u7A0B\u4F1A\u91CD\u65B0\u5C1D\u8BD5\uFF0C\u5F53\u7136\u4E5F\u53EF\u4EE5\u9009\u62E9\u6302\u8D77\u7EBF\u7A0B</p><p>CAS\u7684\u5B9E\u73B0\u9700\u8981\u786C\u4EF6\u6307\u4EE4\u96C6\u7684\u652F\u6491\uFF0C\u5728JDK1.5\u540E\u865A\u62DF\u673A\u624D\u53EF\u4EE5\u4F7F\u7528\u5904\u7406\u5668\u63D0\u4F9B\u7684CMPXCHG\u6307\u4EE4\u5B9E\u73B0\u3002</p><p><strong>Synchronized VS CAS</strong></p><p>\u5143\u8001\u7EA7\u7684Synchronized(\u672A\u4F18\u5316\u524D)\u6700\u4E3B\u8981\u7684\u95EE\u9898\u662F\uFF1A\u5728\u5B58\u5728\u7EBF\u7A0B\u7ADE\u4E89\u7684\u60C5\u51B5\u4E0B\u4F1A\u51FA\u73B0\u7EBF\u7A0B\u963B\u585E\u548C\u5524\u9192\u9501\u5E26\u6765\u7684\u6027\u80FD\u95EE\u9898\uFF0C\u56E0\u4E3A\u8FD9\u662F\u4E00\u79CD\u4E92\u65A5\u540C\u6B65\uFF08\u963B\u585E\u540C\u6B65\uFF09\u3002\u800CCAS\u5E76\u4E0D\u662F\u6B66\u65AD\u7684\u95F4\u7EBF\u7A0B\u6302\u8D77\uFF0C\u5F53CAS\u64CD\u4F5C\u5931\u8D25\u540E\u4F1A\u8FDB\u884C\u4E00\u5B9A\u7684\u5C1D\u8BD5\uFF0C\u800C\u975E\u8FDB\u884C\u8017\u65F6\u7684\u6302\u8D77\u5524\u9192\u7684\u64CD\u4F5C\uFF0C\u56E0\u6B64\u4E5F\u53EB\u505A\u975E\u963B\u585E\u540C\u6B65\u3002\u8FD9\u662F\u4E24\u8005\u4E3B\u8981\u7684\u533A\u522B\u3002</p><blockquote><p>CAS\u7684\u95EE\u9898</p></blockquote><ol><li><p>ABA\u95EE\u9898 \u56E0\u4E3ACAS\u4F1A\u68C0\u67E5\u65E7\u503C\u6709\u6CA1\u6709\u53D8\u5316\uFF0C\u8FD9\u91CC\u5B58\u5728\u8FD9\u6837\u4E00\u4E2A\u6709\u610F\u601D\u7684\u95EE\u9898\u3002\u6BD4\u5982\u4E00\u4E2A\u65E7\u503CA\u53D8\u4E3A\u4E86\u6210B\uFF0C\u7136\u540E\u518D\u53D8\u6210A\uFF0C\u521A\u597D\u5728\u505ACAS\u65F6\u68C0\u67E5\u53D1\u73B0\u65E7\u503C\u5E76\u6CA1\u6709\u53D8\u5316\u4F9D\u7136\u4E3AA\uFF0C\u4F46\u662F\u5B9E\u9645\u4E0A\u7684\u786E\u53D1\u751F\u4E86\u53D8\u5316\u3002\u89E3\u51B3\u65B9\u6848\u53EF\u4EE5\u6CBF\u88AD\u6570\u636E\u5E93\u4E2D\u5E38\u7528\u7684\u4E50\u89C2\u9501\u65B9\u5F0F\uFF0C\u6DFB\u52A0\u4E00\u4E2A\u7248\u672C\u53F7\u53EF\u4EE5\u89E3\u51B3\u3002\u539F\u6765\u7684\u53D8\u5316\u8DEF\u5F84A-&gt;B-&gt;A\u5C31\u53D8\u6210\u4E861A-&gt;2B-&gt;3C\u3002</p></li><li><p>\u81EA\u65CB\u65F6\u95F4\u8FC7\u957F</p></li></ol><p>\u4F7F\u7528CAS\u65F6\u975E\u963B\u585E\u540C\u6B65\uFF0C\u4E5F\u5C31\u662F\u8BF4\u4E0D\u4F1A\u5C06\u7EBF\u7A0B\u6302\u8D77\uFF0C\u4F1A\u81EA\u65CB\uFF08\u65E0\u975E\u5C31\u662F\u4E00\u4E2A\u6B7B\u5FAA\u73AF\uFF09\u8FDB\u884C\u4E0B\u4E00\u6B21\u5C1D\u8BD5\uFF0C\u5982\u679C\u8FD9\u91CC\u81EA\u65CB\u65F6\u95F4\u8FC7\u957F\u5BF9\u6027\u80FD\u662F\u5F88\u5927\u7684\u6D88\u8017\u3002\u5982\u679CJVM\u80FD\u652F\u6301\u5904\u7406\u5668\u63D0\u4F9B\u7684pause\u6307\u4EE4\uFF0C\u90A3\u4E48\u5728\u6548\u7387\u4E0A\u4F1A\u6709\u4E00\u5B9A\u7684\u63D0\u5347\u3002</p><h2 id="\u539F\u5B50\u66F4\u65B0\u57FA\u672C\u7C7B\u578B" tabindex="-1"><a class="header-anchor" href="#\u539F\u5B50\u66F4\u65B0\u57FA\u672C\u7C7B\u578B" aria-hidden="true">#</a> \u539F\u5B50\u66F4\u65B0\u57FA\u672C\u7C7B\u578B</h2><p>atomic\u5305\u63D0\u9AD8\u539F\u5B50\u66F4\u65B0\u57FA\u672C\u7C7B\u578B\u7684\u5DE5\u5177\u7C7B\uFF0C\u4E3B\u8981\u6709\u8FD9\u4E9B\uFF1A</p><ol><li>AtomicBoolean\uFF1A\u4EE5\u539F\u5B50\u66F4\u65B0\u7684\u65B9\u5F0F\u66F4\u65B0boolean\uFF1B</li><li>AtomicInteger\uFF1A\u4EE5\u539F\u5B50\u66F4\u65B0\u7684\u65B9\u5F0F\u66F4\u65B0Integer;</li><li>AtomicLong\uFF1A\u4EE5\u539F\u5B50\u66F4\u65B0\u7684\u65B9\u5F0F\u66F4\u65B0Long\uFF1B</li></ol><p>\u8FD9\u51E0\u4E2A\u7C7B\u7684\u7528\u6CD5\u57FA\u672C\u4E00\u81F4\uFF0C\u8FD9\u91CC\u4EE5AtomicInteger\u4E3A\u4F8B\u603B\u7ED3\u5E38\u7528\u7684\u65B9\u6CD5</p><ol><li>addAndGet(int delta) \uFF1A\u4EE5\u539F\u5B50\u65B9\u5F0F\u5C06\u8F93\u5165\u7684\u6570\u503C\u4E0E\u5B9E\u4F8B\u4E2D\u539F\u672C\u7684\u503C\u76F8\u52A0\uFF0C\u5E76\u8FD4\u56DE\u6700\u540E\u7684\u7ED3\u679C\uFF1B</li><li>incrementAndGet() \uFF1A\u4EE5\u539F\u5B50\u7684\u65B9\u5F0F\u5C06\u5B9E\u4F8B\u4E2D\u7684\u539F\u503C\u8FDB\u884C\u52A01\u64CD\u4F5C\uFF0C\u5E76\u8FD4\u56DE\u6700\u7EC8\u76F8\u52A0\u540E\u7684\u7ED3\u679C\uFF1B</li><li>getAndSet(int newValue)\uFF1A\u5C06\u5B9E\u4F8B\u4E2D\u7684\u503C\u66F4\u65B0\u4E3A\u65B0\u503C\uFF0C\u5E76\u8FD4\u56DE\u65E7\u503C\uFF1B</li><li>getAndIncrement()\uFF1A\u4EE5\u539F\u5B50\u7684\u65B9\u5F0F\u5C06\u5B9E\u4F8B\u4E2D\u7684\u539F\u503C\u52A01\uFF0C\u8FD4\u56DE\u7684\u662F\u81EA\u589E\u524D\u7684\u65E7\u503C\uFF1B</li></ol><p>\u8FD8\u6709\u4E00\u4E9B\u65B9\u6CD5\uFF0C\u53EF\u4EE5\u67E5\u770BAPI\uFF0C\u4E0D\u518D\u8D58\u8FF0\u3002\u4E3A\u4E86\u80FD\u591F\u5F04\u61C2AtomicInteger\u7684\u5B9E\u73B0\u539F\u7406\uFF0C\u4EE5getAndIncrement\u65B9\u6CD5\u4E3A\u4F8B\uFF0C\u6765\u770B\u4E0B\u6E90\u7801\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">final</span> <span class="token keyword">int</span> <span class="token function">getAndIncrement</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
+import{_ as t}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o,c,a as n,b as a,e as l,d as e}from"./app.615e41d8.js";const i={},u=l(`<h2 id="\u539F\u5B50\u64CD\u4F5C\u7C7B\u4ECB\u7ECD" tabindex="-1"><a class="header-anchor" href="#\u539F\u5B50\u64CD\u4F5C\u7C7B\u4ECB\u7ECD" aria-hidden="true">#</a> \u539F\u5B50\u64CD\u4F5C\u7C7B\u4ECB\u7ECD</h2><p>\u5728\u5E76\u53D1\u7F16\u7A0B\u4E2D\u5F88\u5BB9\u6613\u51FA\u73B0\u5E76\u53D1\u5B89\u5168\u7684\u95EE\u9898\uFF0C\u6709\u4E00\u4E2A\u5F88\u7B80\u5355\u7684\u4F8B\u5B50\u5C31\u662F\u591A\u7EBF\u7A0B\u66F4\u65B0\u53D8\u91CFi=1,\u6BD4\u5982\u591A\u4E2A\u7EBF\u7A0B\u6267\u884Ci++\u64CD\u4F5C\uFF0C\u5C31\u6709\u53EF\u80FD\u83B7\u53D6\u4E0D\u5230\u6B63\u786E\u7684\u503C\uFF0C\u800C\u8FD9\u4E2A\u95EE\u9898\uFF0C\u6700\u5E38\u7528\u7684\u65B9\u6CD5\u662F\u901A\u8FC7Synchronized\u8FDB\u884C\u63A7\u5236\u6765\u8FBE\u5230\u7EBF\u7A0B\u5B89\u5168\u7684\u76EE\u7684\u3002</p><p>\u4F46\u662F\u7531\u4E8Esynchronized\u662F\u91C7\u7528\u7684\u662F\u60B2\u89C2\u9501\u7B56\u7565\uFF0C\u5E76\u4E0D\u662F\u7279\u522B\u9AD8\u6548\u7684\u4E00\u79CD\u89E3\u51B3\u65B9\u6848\u3002\u5B9E\u9645\u4E0A\uFF0C\u5728J.U.C\u4E0B\u7684atomic\u5305\u63D0\u4F9B\u4E86\u4E00\u7CFB\u5217\u7684\u64CD\u4F5C\u7B80\u5355\uFF0C\u6027\u80FD\u9AD8\u6548\uFF0C\u5E76\u80FD\u4FDD\u8BC1\u7EBF\u7A0B\u5B89\u5168\u7684\u7C7B\u53BB\u66F4\u65B0\u57FA\u672C\u7C7B\u578B\u53D8\u91CF\uFF0C\u6570\u7EC4\u5143\u7D20\uFF0C\u5F15\u7528\u7C7B\u578B\u4EE5\u53CA\u66F4\u65B0\u5BF9\u8C61\u4E2D\u7684\u5B57\u6BB5\u7C7B\u578B\u3002atomic\u5305\u4E0B\u7684\u8FD9\u4E9B\u7C7B\u90FD\u662F\u91C7\u7528\u7684\u662F\u4E50\u89C2\u9501\u7B56\u7565\u53BB\u539F\u5B50\u66F4\u65B0\u6570\u636E\uFF0C\u5728java\u4E2D\u5219\u662F\u4F7F\u7528CAS\u64CD\u4F5C\u5177\u4F53\u5B9E\u73B0\u3002</p><h2 id="\u9884\u5907\u77E5\u8BC6-cas\u64CD\u4F5C" tabindex="-1"><a class="header-anchor" href="#\u9884\u5907\u77E5\u8BC6-cas\u64CD\u4F5C" aria-hidden="true">#</a> \u9884\u5907\u77E5\u8BC6--CAS\u64CD\u4F5C</h2><p>\u80FD\u591F\u5F04\u61C2atomic\u5305\u4E0B\u8FD9\u4E9B\u539F\u5B50\u64CD\u4F5C\u7C7B\u7684\u5B9E\u73B0\u539F\u7406\uFF0C\u5C31\u8981\u5148\u660E\u767D\u4EC0\u4E48\u662FCAS\u64CD\u4F5C\u3002</p><blockquote><p>\u4EC0\u4E48\u662FCAS?</p></blockquote><p>\u4F7F\u7528\u9501\u65F6\uFF0C\u7EBF\u7A0B\u83B7\u53D6\u9501\u662F\u4E00\u79CD\u60B2\u89C2\u9501\u7B56\u7565\uFF0C\u5373\u5047\u8BBE\u6BCF\u4E00\u6B21\u6267\u884C\u4E34\u754C\u533A\u4EE3\u7801\u90FD\u4F1A\u4EA7\u751F\u51B2\u7A81\uFF0C\u6240\u4EE5\u5F53\u524D\u7EBF\u7A0B\u83B7\u53D6\u5230\u9501\u7684\u65F6\u5019\u540C\u65F6\u4E5F\u4F1A\u963B\u585E\u5176\u4ED6\u7EBF\u7A0B\u83B7\u53D6\u8BE5\u9501\u3002\u800CCAS\u64CD\u4F5C\uFF08\u53C8\u79F0\u4E3A\u65E0\u9501\u64CD\u4F5C\uFF09\u662F\u4E00\u79CD\u4E50\u89C2\u9501\u7B56\u7565\uFF0C\u5B83\u5047\u8BBE\u6240\u6709\u7EBF\u7A0B\u8BBF\u95EE\u5171\u4EAB\u8D44\u6E90\u7684\u65F6\u5019\u4E0D\u4F1A\u51FA\u73B0\u51B2\u7A81\uFF0C\u65E2\u7136\u4E0D\u4F1A\u51FA\u73B0\u51B2\u7A81\u81EA\u7136\u800C\u7136\u5C31\u4E0D\u4F1A\u963B\u585E\u5176\u4ED6\u7EBF\u7A0B\u7684\u64CD\u4F5C\u3002\u56E0\u6B64\uFF0C\u7EBF\u7A0B\u5C31\u4E0D\u4F1A\u51FA\u73B0\u963B\u585E\u505C\u987F\u7684\u72B6\u6001\u3002\u90A3\u4E48\uFF0C\u5982\u679C\u51FA\u73B0\u51B2\u7A81\u4E86\u600E\u4E48\u529E\uFF1F\u65E0\u9501\u64CD\u4F5C\u662F\u4F7F\u7528CAS(compare and swap)\u53C8\u53EB\u505A\u6BD4\u8F83\u4EA4\u6362\u6765\u9274\u522B\u7EBF\u7A0B\u662F\u5426\u51FA\u73B0\u51B2\u7A81\uFF0C\u51FA\u73B0\u51B2\u7A81\u5C31\u91CD\u8BD5\u5F53\u524D\u64CD\u4F5C\u76F4\u5230\u6CA1\u6709\u51B2\u7A81\u4E3A\u6B62\u3002</p><blockquote><p>CAS\u7684\u64CD\u4F5C\u8FC7\u7A0B</p></blockquote><p>CAS\u6BD4\u8F83\u4EA4\u6362\u7684\u8FC7\u7A0B\u53EF\u4EE5\u901A\u4FD7\u7684\u7406\u89E3\u4E3ACAS(V,O,N)\uFF0C\u5305\u542B\u4E09\u4E2A\u503C\u5206\u522B\u4E3A\uFF1AV \u5185\u5B58\u5730\u5740\u5B58\u653E\u7684\u5B9E\u9645\u503C\uFF1BO \u9884\u671F\u7684\u503C\uFF08\u65E7\u503C\uFF09\uFF1BN \u66F4\u65B0\u7684\u65B0\u503C\u3002\u5F53V\u548CO\u76F8\u540C\u65F6\uFF0C\u4E5F\u5C31\u662F\u8BF4\u65E7\u503C\u548C\u5185\u5B58\u4E2D\u5B9E\u9645\u7684\u503C\u76F8\u540C\u8868\u660E\u8BE5\u503C\u6CA1\u6709\u88AB\u5176\u4ED6\u7EBF\u7A0B\u66F4\u6539\u8FC7\uFF0C\u5373\u8BE5\u65E7\u503CO\u5C31\u662F\u76EE\u524D\u6765\u8BF4\u6700\u65B0\u7684\u503C\u4E86\uFF0C\u81EA\u7136\u800C\u7136\u53EF\u4EE5\u5C06\u65B0\u503CN\u8D4B\u503C\u7ED9V\u3002\u53CD\u4E4B\uFF0CV\u548CO\u4E0D\u76F8\u540C\uFF0C\u8868\u660E\u8BE5\u503C\u5DF2\u7ECF\u88AB\u5176\u4ED6\u7EBF\u7A0B\u6539\u8FC7\u4E86\u5219\u8BE5\u65E7\u503CO\u4E0D\u662F\u6700\u65B0\u7248\u672C\u7684\u503C\u4E86\uFF0C\u6240\u4EE5\u4E0D\u80FD\u5C06\u65B0\u503CN\u8D4B\u7ED9V\uFF0C\u8FD4\u56DEV\u5373\u53EF\u3002\u5F53\u591A\u4E2A\u7EBF\u7A0B\u4F7F\u7528CAS\u64CD\u4F5C\u4E00\u4E2A\u53D8\u91CF\u662F\uFF0C\u53EA\u6709\u4E00\u4E2A\u7EBF\u7A0B\u4F1A\u6210\u529F\uFF0C\u5E76\u6210\u529F\u66F4\u65B0\uFF0C\u5176\u4F59\u4F1A\u5931\u8D25\u3002\u5931\u8D25\u7684\u7EBF\u7A0B\u4F1A\u91CD\u65B0\u5C1D\u8BD5\uFF0C\u5F53\u7136\u4E5F\u53EF\u4EE5\u9009\u62E9\u6302\u8D77\u7EBF\u7A0B</p><p>CAS\u7684\u5B9E\u73B0\u9700\u8981\u786C\u4EF6\u6307\u4EE4\u96C6\u7684\u652F\u6491\uFF0C\u5728JDK1.5\u540E\u865A\u62DF\u673A\u624D\u53EF\u4EE5\u4F7F\u7528\u5904\u7406\u5668\u63D0\u4F9B\u7684CMPXCHG\u6307\u4EE4\u5B9E\u73B0\u3002</p><p><strong>Synchronized VS CAS</strong></p><p>\u5143\u8001\u7EA7\u7684Synchronized(\u672A\u4F18\u5316\u524D)\u6700\u4E3B\u8981\u7684\u95EE\u9898\u662F\uFF1A\u5728\u5B58\u5728\u7EBF\u7A0B\u7ADE\u4E89\u7684\u60C5\u51B5\u4E0B\u4F1A\u51FA\u73B0\u7EBF\u7A0B\u963B\u585E\u548C\u5524\u9192\u9501\u5E26\u6765\u7684\u6027\u80FD\u95EE\u9898\uFF0C\u56E0\u4E3A\u8FD9\u662F\u4E00\u79CD\u4E92\u65A5\u540C\u6B65\uFF08\u963B\u585E\u540C\u6B65\uFF09\u3002\u800CCAS\u5E76\u4E0D\u662F\u6B66\u65AD\u7684\u95F4\u7EBF\u7A0B\u6302\u8D77\uFF0C\u5F53CAS\u64CD\u4F5C\u5931\u8D25\u540E\u4F1A\u8FDB\u884C\u4E00\u5B9A\u7684\u5C1D\u8BD5\uFF0C\u800C\u975E\u8FDB\u884C\u8017\u65F6\u7684\u6302\u8D77\u5524\u9192\u7684\u64CD\u4F5C\uFF0C\u56E0\u6B64\u4E5F\u53EB\u505A\u975E\u963B\u585E\u540C\u6B65\u3002\u8FD9\u662F\u4E24\u8005\u4E3B\u8981\u7684\u533A\u522B\u3002</p><blockquote><p>CAS\u7684\u95EE\u9898</p></blockquote><ol><li><p>ABA\u95EE\u9898 \u56E0\u4E3ACAS\u4F1A\u68C0\u67E5\u65E7\u503C\u6709\u6CA1\u6709\u53D8\u5316\uFF0C\u8FD9\u91CC\u5B58\u5728\u8FD9\u6837\u4E00\u4E2A\u6709\u610F\u601D\u7684\u95EE\u9898\u3002\u6BD4\u5982\u4E00\u4E2A\u65E7\u503CA\u53D8\u4E3A\u4E86\u6210B\uFF0C\u7136\u540E\u518D\u53D8\u6210A\uFF0C\u521A\u597D\u5728\u505ACAS\u65F6\u68C0\u67E5\u53D1\u73B0\u65E7\u503C\u5E76\u6CA1\u6709\u53D8\u5316\u4F9D\u7136\u4E3AA\uFF0C\u4F46\u662F\u5B9E\u9645\u4E0A\u7684\u786E\u53D1\u751F\u4E86\u53D8\u5316\u3002\u89E3\u51B3\u65B9\u6848\u53EF\u4EE5\u6CBF\u88AD\u6570\u636E\u5E93\u4E2D\u5E38\u7528\u7684\u4E50\u89C2\u9501\u65B9\u5F0F\uFF0C\u6DFB\u52A0\u4E00\u4E2A\u7248\u672C\u53F7\u53EF\u4EE5\u89E3\u51B3\u3002\u539F\u6765\u7684\u53D8\u5316\u8DEF\u5F84A-&gt;B-&gt;A\u5C31\u53D8\u6210\u4E861A-&gt;2B-&gt;3C\u3002</p></li><li><p>\u81EA\u65CB\u65F6\u95F4\u8FC7\u957F</p></li></ol><p>\u4F7F\u7528CAS\u65F6\u975E\u963B\u585E\u540C\u6B65\uFF0C\u4E5F\u5C31\u662F\u8BF4\u4E0D\u4F1A\u5C06\u7EBF\u7A0B\u6302\u8D77\uFF0C\u4F1A\u81EA\u65CB\uFF08\u65E0\u975E\u5C31\u662F\u4E00\u4E2A\u6B7B\u5FAA\u73AF\uFF09\u8FDB\u884C\u4E0B\u4E00\u6B21\u5C1D\u8BD5\uFF0C\u5982\u679C\u8FD9\u91CC\u81EA\u65CB\u65F6\u95F4\u8FC7\u957F\u5BF9\u6027\u80FD\u662F\u5F88\u5927\u7684\u6D88\u8017\u3002\u5982\u679CJVM\u80FD\u652F\u6301\u5904\u7406\u5668\u63D0\u4F9B\u7684pause\u6307\u4EE4\uFF0C\u90A3\u4E48\u5728\u6548\u7387\u4E0A\u4F1A\u6709\u4E00\u5B9A\u7684\u63D0\u5347\u3002</p><h2 id="\u539F\u5B50\u66F4\u65B0\u57FA\u672C\u7C7B\u578B" tabindex="-1"><a class="header-anchor" href="#\u539F\u5B50\u66F4\u65B0\u57FA\u672C\u7C7B\u578B" aria-hidden="true">#</a> \u539F\u5B50\u66F4\u65B0\u57FA\u672C\u7C7B\u578B</h2><p>atomic\u5305\u63D0\u9AD8\u539F\u5B50\u66F4\u65B0\u57FA\u672C\u7C7B\u578B\u7684\u5DE5\u5177\u7C7B\uFF0C\u4E3B\u8981\u6709\u8FD9\u4E9B\uFF1A</p><ol><li>AtomicBoolean\uFF1A\u4EE5\u539F\u5B50\u66F4\u65B0\u7684\u65B9\u5F0F\u66F4\u65B0boolean\uFF1B</li><li>AtomicInteger\uFF1A\u4EE5\u539F\u5B50\u66F4\u65B0\u7684\u65B9\u5F0F\u66F4\u65B0Integer;</li><li>AtomicLong\uFF1A\u4EE5\u539F\u5B50\u66F4\u65B0\u7684\u65B9\u5F0F\u66F4\u65B0Long\uFF1B</li></ol><p>\u8FD9\u51E0\u4E2A\u7C7B\u7684\u7528\u6CD5\u57FA\u672C\u4E00\u81F4\uFF0C\u8FD9\u91CC\u4EE5AtomicInteger\u4E3A\u4F8B\u603B\u7ED3\u5E38\u7528\u7684\u65B9\u6CD5</p><ol><li>addAndGet(int delta) \uFF1A\u4EE5\u539F\u5B50\u65B9\u5F0F\u5C06\u8F93\u5165\u7684\u6570\u503C\u4E0E\u5B9E\u4F8B\u4E2D\u539F\u672C\u7684\u503C\u76F8\u52A0\uFF0C\u5E76\u8FD4\u56DE\u6700\u540E\u7684\u7ED3\u679C\uFF1B</li><li>incrementAndGet() \uFF1A\u4EE5\u539F\u5B50\u7684\u65B9\u5F0F\u5C06\u5B9E\u4F8B\u4E2D\u7684\u539F\u503C\u8FDB\u884C\u52A01\u64CD\u4F5C\uFF0C\u5E76\u8FD4\u56DE\u6700\u7EC8\u76F8\u52A0\u540E\u7684\u7ED3\u679C\uFF1B</li><li>getAndSet(int newValue)\uFF1A\u5C06\u5B9E\u4F8B\u4E2D\u7684\u503C\u66F4\u65B0\u4E3A\u65B0\u503C\uFF0C\u5E76\u8FD4\u56DE\u65E7\u503C\uFF1B</li><li>getAndIncrement()\uFF1A\u4EE5\u539F\u5B50\u7684\u65B9\u5F0F\u5C06\u5B9E\u4F8B\u4E2D\u7684\u539F\u503C\u52A01\uFF0C\u8FD4\u56DE\u7684\u662F\u81EA\u589E\u524D\u7684\u65E7\u503C\uFF1B</li></ol><p>\u8FD8\u6709\u4E00\u4E9B\u65B9\u6CD5\uFF0C\u53EF\u4EE5\u67E5\u770BAPI\uFF0C\u4E0D\u518D\u8D58\u8FF0\u3002\u4E3A\u4E86\u80FD\u591F\u5F04\u61C2AtomicInteger\u7684\u5B9E\u73B0\u539F\u7406\uFF0C\u4EE5getAndIncrement\u65B9\u6CD5\u4E3A\u4F8B\uFF0C\u6765\u770B\u4E0B\u6E90\u7801\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">final</span> <span class="token keyword">int</span> <span class="token function">getAndIncrement</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
     <span class="token keyword">return</span> unsafe<span class="token punctuation">.</span><span class="token function">getAndAddInt</span><span class="token punctuation">(</span><span class="token keyword">this</span><span class="token punctuation">,</span> valueOffset<span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>\u53EF\u4EE5\u770B\u51FA\uFF0C\u8BE5\u65B9\u6CD5\u5B9E\u9645\u4E0A\u662F\u8C03\u7528\u4E86unsafe\u5B9E\u4F8B\u7684getAndAddInt\u65B9\u6CD5\uFF0Cunsafe\u5B9E\u4F8B\u7684\u83B7\u53D6\u65F6\u901A\u8FC7UnSafe\u7C7B\u7684\u9759\u6001\u65B9\u6CD5getUnsafe\u83B7\u53D6\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">private</span> <span class="token keyword">static</span> <span class="token keyword">final</span> <span class="token class-name">Unsafe</span> unsafe <span class="token operator">=</span> <span class="token class-name">Unsafe</span><span class="token punctuation">.</span><span class="token function">getUnsafe</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
diff --git a/dist/assets/auto-generator.html.79ba5c06.js b/dist/assets/auto-generator.html.341a868e.js
similarity index 79%
rename from dist/assets/auto-generator.html.79ba5c06.js
rename to dist/assets/auto-generator.html.341a868e.js
index af87a2b2..7739348c 100644
--- a/dist/assets/auto-generator.html.79ba5c06.js
+++ b/dist/assets/auto-generator.html.341a868e.js
@@ -1,4 +1,4 @@
-import{_ as l}from"./plugin-vue_export-helper.21dcd24c.js";import{r as i,o as c,c as r,a as n,b as e,w as p,d as a,e as t}from"./app.a0271b9c.js";const u={},d=n("p",null,"\u4F5C\u4E3A\u4E00\u540D Java \u540E\u7AEF\u5F00\u53D1\uFF0C\u65E5\u5E38\u5DE5\u4F5C\u4E2D\u514D\u4E0D\u4E86\u8981\u751F\u6210\u6570\u636E\u5E93\u8868\u5BF9\u5E94\u7684\u6301\u4E45\u5316\u5BF9\u8C61 PO\uFF0C\u64CD\u4F5C\u6570\u636E\u5E93\u7684\u63A5\u53E3 DAO\uFF0C\u4EE5\u53CA CRUD \u7684 XML\uFF0C\u4E5F\u5C31\u662F mapper\u3002",-1),v=n("p",null,"Mybatis Generator \u662F MyBatis \u5B98\u65B9\u63D0\u4F9B\u7684\u4E00\u4E2A\u4EE3\u7801\u751F\u6210\u5DE5\u5177\uFF0C\u5B8C\u5168\u53EF\u4EE5\u80DC\u4EFB\u8FD9\u4E2A\u5DE5\u4F5C\uFF0C\u4E0D\u8FC7\u6700\u8FD1\u5728\u5F00\u53D1\u201C\u7F16\u7A0B\u55B5\u{1F431}\u201D\u5F00\u6E90\u7F51\u7AD9\u7684\u65F6\u5019\u8BD5\u7528\u4E86\u4E00\u4E0B MyBatis-Plus \u5B98\u65B9\u63D0\u4F9B AutoGenerator\uFF0C\u53D1\u73B0\u914D\u7F6E\u66F4\u7B80\u5355\uFF0C\u5F00\u53D1\u6548\u7387\u66F4\u9AD8\uFF01\u4E8E\u662F\u5C31\u6765\u7ED9\u5C0F\u4F19\u4F34\u4EEC\u5B89\u5229\u4E00\u6CE2\u3002",-1),m=n("p",null,"\u8BA9\u6211\u4EEC\u6765\u901A\u8FC7\u4E00\u4E2A gif \u611F\u53D7\u4E00\u4E0B AutoGenerator \u7684\u5F3A\u5927\u3002",-1),g=n("p",null,[n("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/kaiyuan/auto-generator-1.gif",alt:""})],-1),b=n("h3",{id:"\u5BFC\u5165-sql-\u6587\u4EF6",tabindex:"-1"},[n("a",{class:"header-anchor",href:"#\u5BFC\u5165-sql-\u6587\u4EF6","aria-hidden":"true"},"#"),a(" \u5BFC\u5165 SQL \u6587\u4EF6")],-1),k=n("p",null,"\u7F16\u7A0B\u55B5\u9879\u76EE\u7684 SQL \u6587\u4EF6\u6211\u5DF2\u7ECF\u540C\u6B65\u5230\u672C\u6559\u7A0B\u6240\u5728\u7684\u6E90\u7801\u5F53\u4E2D\u3002",-1),h=a("\u8DEF\u5F84\uFF1A"),y={href:"https://github.com/itwanger/codingmore-learning/tree/main/codingmore-autogenerator",target:"_blank",rel:"noopener noreferrer"},f=a("https://github.com/itwanger/codingmore-learning/tree/main/codingmore-autogenerator"),q=t(`<p>\u53EF\u4EE5\u901A\u8FC7 GitHub \u684C\u9762\u7248\u4ECE GitHub \u4E0A\u4E0B\u8F7D\u672C\u6559\u7A0B\u4E13\u5C5E\u7684\u9879\u76EE codingmore-autogenerator \u5230\u672C\u5730\uFF0CSQL \u6587\u4EF6\u7684\u4F4D\u7F6E\u53C2\u7167\u4E0B\u56FE\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/kaiyuan/auto-generator-47997c23-cb65-4801-954c-0ec611b764ad.png" alt=""></p><p>\u7F16\u7A0B\u55B5\u4F7F\u7528\u7684 MySQL \u7248\u672C\u662F 8.0\uFF0C\u53EF\u4EE5\u5728\u94FE\u63A5\u4E0A MySQL \u540E\u4F7F\u7528 <code>select version();</code> \u547D\u4EE4\u67E5\u8BE2\u7248\u672C\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/kaiyuan/auto-generator-ea5bbe50-ba28-4056-a81f-a68651a58391.png" alt=""></p><p>\u6253\u5F00 Navicat\uFF0C\u628A SQL \u6587\u4EF6\u5BFC\u5165\u5230\u672C\u5730\u6570\u636E\u5E93\uFF0C</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/kaiyuan/auto-generator-d523792f-2d55-4485-b64d-b4763ecd7b77.png" alt=""></p><p>\u5173\u95ED\u94FE\u63A5\uFF0C\u91CD\u65B0\u6253\u5F00\u5C31\u53EF\u4EE5\u770B\u5230\u5BFC\u5165\u540E\u7684\u6570\u636E\u5E93 codingmore\uFF0C\u91CC\u9762\u4E00\u5171 27 \u5F20\u8868\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/kaiyuan/auto-generator-3cda9cb7-dda5-4aca-9cea-cc400768b921.png" alt=""></p><h3 id="\u5148\u4F53\u9A8C-mybatis-generator" tabindex="-1"><a class="header-anchor" href="#\u5148\u4F53\u9A8C-mybatis-generator" aria-hidden="true">#</a> \u5148\u4F53\u9A8C Mybatis Generator</h3><p>\u7B2C\u4E00\u6B65\uFF0C\u5728 pom.xml \u6587\u4EF6\u4E2D\u6DFB\u52A0 MySQL+MyBatis \u7684\u4F9D\u8D56\uFF08Mybatis Generator \u7684\u524D\u7F6E\u6761\u4EF6\uFF09\u3002</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
+import{_ as i}from"./plugin-vue_export-helper.21dcd24c.js";import{r as o,o as l,c,a as n,b as s,d as a,e as t}from"./app.615e41d8.js";const r={},p=n("p",null,"\u4F5C\u4E3A\u4E00\u540D Java \u540E\u7AEF\u5F00\u53D1\uFF0C\u65E5\u5E38\u5DE5\u4F5C\u4E2D\u514D\u4E0D\u4E86\u8981\u751F\u6210\u6570\u636E\u5E93\u8868\u5BF9\u5E94\u7684\u6301\u4E45\u5316\u5BF9\u8C61 PO\uFF0C\u64CD\u4F5C\u6570\u636E\u5E93\u7684\u63A5\u53E3 DAO\uFF0C\u4EE5\u53CA CRUD \u7684 XML\uFF0C\u4E5F\u5C31\u662F mapper\u3002",-1),u=n("p",null,"Mybatis Generator \u662F MyBatis \u5B98\u65B9\u63D0\u4F9B\u7684\u4E00\u4E2A\u4EE3\u7801\u751F\u6210\u5DE5\u5177\uFF0C\u5B8C\u5168\u53EF\u4EE5\u80DC\u4EFB\u8FD9\u4E2A\u5DE5\u4F5C\uFF0C\u4E0D\u8FC7\u6700\u8FD1\u5728\u5F00\u53D1\u201C\u7F16\u7A0B\u55B5\u{1F431}\u201D\u5F00\u6E90\u7F51\u7AD9\u7684\u65F6\u5019\u8BD5\u7528\u4E86\u4E00\u4E0B MyBatis-Plus \u5B98\u65B9\u63D0\u4F9B AutoGenerator\uFF0C\u53D1\u73B0\u914D\u7F6E\u66F4\u7B80\u5355\uFF0C\u5F00\u53D1\u6548\u7387\u66F4\u9AD8\uFF01\u4E8E\u662F\u5C31\u6765\u7ED9\u5C0F\u4F19\u4F34\u4EEC\u5B89\u5229\u4E00\u6CE2\u3002",-1),d=n("p",null,"\u8BA9\u6211\u4EEC\u6765\u901A\u8FC7\u4E00\u4E2A gif \u611F\u53D7\u4E00\u4E0B AutoGenerator \u7684\u5F3A\u5927\u3002",-1),v=n("p",null,[n("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/kaiyuan/auto-generator-1.gif",alt:""})],-1),m=n("h2",{id:"\u5BFC\u5165-sql-\u6587\u4EF6",tabindex:"-1"},[n("a",{class:"header-anchor",href:"#\u5BFC\u5165-sql-\u6587\u4EF6","aria-hidden":"true"},"#"),a(" \u5BFC\u5165 SQL \u6587\u4EF6")],-1),g=n("p",null,"\u7F16\u7A0B\u55B5\u9879\u76EE\u7684 SQL \u6587\u4EF6\u6211\u5DF2\u7ECF\u540C\u6B65\u5230\u672C\u6559\u7A0B\u6240\u5728\u7684\u6E90\u7801\u5F53\u4E2D\u3002",-1),b=a("\u8DEF\u5F84\uFF1A"),k={href:"https://github.com/itwanger/codingmore-learning/tree/main/codingmore-autogenerator",target:"_blank",rel:"noopener noreferrer"},h=a("https://github.com/itwanger/codingmore-learning/tree/main/codingmore-autogenerator"),y=t(`<p>\u53EF\u4EE5\u901A\u8FC7 GitHub \u684C\u9762\u7248\u4ECE GitHub \u4E0A\u4E0B\u8F7D\u672C\u6559\u7A0B\u4E13\u5C5E\u7684\u9879\u76EE codingmore-autogenerator \u5230\u672C\u5730\uFF0CSQL \u6587\u4EF6\u7684\u4F4D\u7F6E\u53C2\u7167\u4E0B\u56FE\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/kaiyuan/auto-generator-47997c23-cb65-4801-954c-0ec611b764ad.png" alt=""></p><p>\u7F16\u7A0B\u55B5\u4F7F\u7528\u7684 MySQL \u7248\u672C\u662F 8.0\uFF0C\u53EF\u4EE5\u5728\u94FE\u63A5\u4E0A MySQL \u540E\u4F7F\u7528 <code>select version();</code> \u547D\u4EE4\u67E5\u8BE2\u7248\u672C\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/kaiyuan/auto-generator-ea5bbe50-ba28-4056-a81f-a68651a58391.png" alt=""></p><p>\u6253\u5F00 Navicat\uFF0C\u628A SQL \u6587\u4EF6\u5BFC\u5165\u5230\u672C\u5730\u6570\u636E\u5E93\uFF0C</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/kaiyuan/auto-generator-d523792f-2d55-4485-b64d-b4763ecd7b77.png" alt=""></p><p>\u5173\u95ED\u94FE\u63A5\uFF0C\u91CD\u65B0\u6253\u5F00\u5C31\u53EF\u4EE5\u770B\u5230\u5BFC\u5165\u540E\u7684\u6570\u636E\u5E93 codingmore\uFF0C\u91CC\u9762\u4E00\u5171 27 \u5F20\u8868\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/kaiyuan/auto-generator-3cda9cb7-dda5-4aca-9cea-cc400768b921.png" alt=""></p><h2 id="\u5148\u4F53\u9A8C-mybatis-generator" tabindex="-1"><a class="header-anchor" href="#\u5148\u4F53\u9A8C-mybatis-generator" aria-hidden="true">#</a> \u5148\u4F53\u9A8C Mybatis Generator</h2><p>\u7B2C\u4E00\u6B65\uFF0C\u5728 pom.xml \u6587\u4EF6\u4E2D\u6DFB\u52A0 MySQL+MyBatis \u7684\u4F9D\u8D56\uFF08Mybatis Generator \u7684\u524D\u7F6E\u6761\u4EF6\uFF09\u3002</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
     &lt;groupId&gt;org.mybatis.spring.boot&lt;/groupId&gt;
     &lt;artifactId&gt;mybatis-spring-boot-starter&lt;/artifactId&gt;
     &lt;version&gt;2.2.2&lt;/version&gt;
@@ -9,7 +9,7 @@ import{_ as l}from"./plugin-vue_export-helper.21dcd24c.js";import{r as i,o as c,
     &lt;artifactId&gt;mysql-connector-java&lt;/artifactId&gt;
     &lt;scope&gt;runtime&lt;/scope&gt;
 &lt;/dependency&gt;
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>\u6DFB\u52A0\u5B8C\u6210\u540E\uFF0C\u4E00\u5B9A\u8981\u6267\u884C\u4E00\u6B21 Maven \u91CD\u8F7D\uFF08\u89C1\u4E0B\u56FE\uFF09\uFF0C\u786E\u4FDD MyBatis \u7684\u4F9D\u8D56\u52A0\u8F7D\u5B8C\u6BD5\u540E\u518D\u6267\u884C\u7B2C\u4E8C\u6B65\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/kaiyuan/auto-generator-b9dc31ee-32f4-4556-b2e8-b0ed114ec81a.png" alt=""></p><p>\u5426\u5219\u4E0B\u4E00\u6B65\u53EF\u80FD\u4E0D\u901A\u8FC7\uFF0C\u4F46\u53C8\u5F97\u4E0D\u5230\u4EFB\u4F55\u9519\u8BEF\u63D0\u793A\u3002\u4E0D\u8981\u95EE\u6211\u4E3A\u4EC0\u4E48\uFF0C\u8E29\u8FC7\u5751\u540E\u75DB\u82E6\u7684\u9886\u609F\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/kaiyuan/auto-generator-3.png" alt=""></p><p>\u6DFB\u52A0\u5B8C\u6210\u540E\uFF0C\u53EF\u4EE5\u901A\u8FC7 Maven \u63D2\u4EF6\u6765\u751F\u6210\u9AA8\u67B6\u4EE3\u7801\uFF0C\u4E5F\u53EF\u4EE5\u901A\u8FC7 Java \u4EE3\u7801\u6765\u751F\u6210\u9AA8\u67B6\u4EE3\u7801\uFF0C\u8FD9\u91CC\u4EE5 Maven \u63D2\u4EF6\u7684\u5F62\u5F0F\u6765\u6F14\u793A\u3002Java \u4EE3\u7801\u7684\u5F62\u5F0F\u53EF\u53C2\u7167 Mybatis Generator\uFF1A</p>`,16),_={href:"https://mybatis.org/generator/running/runningWithJava.html",target:"_blank",rel:"noopener noreferrer"},j=a("https://mybatis.org/generator/running/runningWithJava.html"),x=t(`<p>\u7B2C\u4E8C\u6B65\uFF0C\u5728 pom.xml \u6587\u4EF6\u4E2D\uFF0C\u6DFB\u52A0 MyBatis Generator \u63D2\u4EF6\uFF0C\u6CE8\u610F\u662F\u5728 <strong>build\u2192plugins</strong> \u4E0B\u8282\u70B9\u4E0B\u6DFB\u52A0\u3002</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;!-- MyBatis Generator \u63D2\u4EF6 --&gt;
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>\u6DFB\u52A0\u5B8C\u6210\u540E\uFF0C\u4E00\u5B9A\u8981\u6267\u884C\u4E00\u6B21 Maven \u91CD\u8F7D\uFF08\u89C1\u4E0B\u56FE\uFF09\uFF0C\u786E\u4FDD MyBatis \u7684\u4F9D\u8D56\u52A0\u8F7D\u5B8C\u6BD5\u540E\u518D\u6267\u884C\u7B2C\u4E8C\u6B65\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/kaiyuan/auto-generator-b9dc31ee-32f4-4556-b2e8-b0ed114ec81a.png" alt=""></p><p>\u5426\u5219\u4E0B\u4E00\u6B65\u53EF\u80FD\u4E0D\u901A\u8FC7\uFF0C\u4F46\u53C8\u5F97\u4E0D\u5230\u4EFB\u4F55\u9519\u8BEF\u63D0\u793A\u3002\u4E0D\u8981\u95EE\u6211\u4E3A\u4EC0\u4E48\uFF0C\u8E29\u8FC7\u5751\u540E\u75DB\u82E6\u7684\u9886\u609F\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/kaiyuan/auto-generator-3.png" alt=""></p><p>\u6DFB\u52A0\u5B8C\u6210\u540E\uFF0C\u53EF\u4EE5\u901A\u8FC7 Maven \u63D2\u4EF6\u6765\u751F\u6210\u9AA8\u67B6\u4EE3\u7801\uFF0C\u4E5F\u53EF\u4EE5\u901A\u8FC7 Java \u4EE3\u7801\u6765\u751F\u6210\u9AA8\u67B6\u4EE3\u7801\uFF0C\u8FD9\u91CC\u4EE5 Maven \u63D2\u4EF6\u7684\u5F62\u5F0F\u6765\u6F14\u793A\u3002Java \u4EE3\u7801\u7684\u5F62\u5F0F\u53EF\u53C2\u7167 Mybatis Generator\uFF1A</p>`,16),f={href:"https://mybatis.org/generator/running/runningWithJava.html",target:"_blank",rel:"noopener noreferrer"},q=a("https://mybatis.org/generator/running/runningWithJava.html"),_=t(`<p>\u7B2C\u4E8C\u6B65\uFF0C\u5728 pom.xml \u6587\u4EF6\u4E2D\uFF0C\u6DFB\u52A0 MyBatis Generator \u63D2\u4EF6\uFF0C\u6CE8\u610F\u662F\u5728 <strong>build\u2192plugins</strong> \u4E0B\u8282\u70B9\u4E0B\u6DFB\u52A0\u3002</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;!-- MyBatis Generator \u63D2\u4EF6 --&gt;
 &lt;plugin&gt;
     &lt;groupId&gt;org.mybatis.generator&lt;/groupId&gt;
     &lt;artifactId&gt;mybatis-generator-maven-plugin&lt;/artifactId&gt;
@@ -84,7 +84,7 @@ import{_ as l}from"./plugin-vue_export-helper.21dcd24c.js";import{r as i,o as c,
         &lt;/table&gt;
     &lt;/context&gt;
 &lt;/generatorConfiguration&gt;
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><ul><li>\u914D\u7F6E\u6587\u4EF6\u81F3\u5C11\u5F97\u5305\u542B\u4E00\u4E2Acontext</li><li>commentGenerator \u7528\u6765\u914D\u7F6E\u751F\u6210\u7684\u6CE8\u91CA</li><li>jdbcConnection \u7528\u6765\u94FE\u63A5\u6570\u636E\u5E93</li><li>javaTypeResolver \u914D\u7F6E JDBC \u4E0E Java \u7684\u7C7B\u578B\u8F6C\u6362\u89C4\u5219</li><li>javaModelGenerator \u914D\u7F6E po \u751F\u6210\u7684\u5305\u8DEF\u5F84\u548C\u9879\u76EE\u8DEF\u5F84</li><li>sqlMapGenerator \u914D\u7F6E mapper.xml \u6587\u4EF6\u751F\u6210\u7684\u76EE\u5F55</li><li>javaClientGenerator \u914D\u7F6E mapper.java \u6587\u4EF6\u751F\u6210\u7684\u76EE\u5F55</li><li>\u4E00\u4E2A table \u5BF9\u5E94\u4E00\u5F20\u8868\uFF0C\u5982\u679C\u60F3\u540C\u65F6\u751F\u6210\u591A\u5F20\u8868\uFF0C\u9700\u8981\u914D\u7F6E\u591A\u4E2A table</li></ul><p>\u66F4\u591A\u914D\u7F6E\u4FE1\u606F\u53EF\u4EE5\u53C2\u7167\u4E0B\u9762\u8FD9\u7BC7\u6587\u7AE0\uFF1A</p>`,18),M={href:"https://juejin.cn/post/6844903982582743048",target:"_blank",rel:"noopener noreferrer"},G=a("https://juejin.cn/post/6844903982582743048"),C=t(`<p>\u5230\u6B64\u4E3A\u6B62\uFF0Cmybatis-generator-maven-plugin \u5C31\u7B97\u662F\u914D\u7F6E\u5B8C\u6210\u4E86\uFF0C\u5B8C\u6574\u5185\u5BB9\u5982\u4E0B\u56FE\u6240\u793A\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/kaiyuan/auto-generator-c09c7dcd-ab4e-437b-a512-a9e0bf1f533c.png" alt=""></p><p>\u914D\u7F6E\u5B8C\u6210\u540E\u53EF\u4EE5\u53CC\u51FB\u8FD0\u884C Maven \u7684\u63D2\u4EF6 Mybatis Generator\uFF0C\u6CA1\u6709\u95EE\u9898\u7684\u8BDD\uFF0C\u53EF\u4EE5\u770B\u5230\u751F\u6210\u540E\u7684\u6587\u4EF6\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/kaiyuan/auto-generator-843487f6-5823-4291-b6c3-b4f69b9bba51.png" alt=""></p><h3 id="\u518D\u4F53\u9A8C-mybatis-plus-\u7684-autogenerator" tabindex="-1"><a class="header-anchor" href="#\u518D\u4F53\u9A8C-mybatis-plus-\u7684-autogenerator" aria-hidden="true">#</a> \u518D\u4F53\u9A8C MyBatis-Plus \u7684 AutoGenerator</h3><p>MyBatis-Plus\uFF08\u7B80\u5199 MP\uFF09\u662F MyBatis \u7684\u589E\u5F3A\u5DE5\u5177\uFF0C\u5B98\u65B9\u5BA3\u79F0 MP \u548C MyBatis \u7684\u5173\u7CFB\u5C31\u597D\u50CF\u9B42\u6597\u7F57\u4E2D\u7684 1P \u548C 2P\uFF0C\u53EF\u8C13\u597D\u57FA\u53CB\uFF0C\u5929\u4E0B\u8D70\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/kaiyuan/auto-generator-7.png" alt=""></p><p>AutoGenerator \u662F MyBatis-Plus \u63A8\u51FA\u7684\u4EE3\u7801\u751F\u6210\u5668\uFF0C\u53EF\u4EE5\u5FEB\u901F\u751F\u6210 Entity\u3001Mapper\u3001Mapper XML\u3001Service\u3001Controller \u7B49\u5404\u4E2A\u6A21\u5757\u7684\u4EE3\u7801\uFF0C\u6BD4 Mybatis Generator \u66F4\u5F3A\u5927\uFF0C\u5F00\u53D1\u6548\u7387\u66F4\u9AD8\u3002</p><p>\u901A\u8FC7\u524D\u9762\u7684\u4F53\u9A8C\uFF0C\u60F3\u5FC5\u5927\u5BB6\u786E\u5B9E\u611F\u89C9\u5230\u4E86 Mybatis Generator \u7684\u7E41\u7410\uFF0C\u63A5\u4E0B\u6765\uFF0C\u6211\u4EEC\u6765\u4F53\u9A8C\u4E00\u4E0B AutoGenerator\uFF0C\u5BF9\u6BD4\u8FC7\u540E\uFF0C\u5927\u5BB6\u5FC3\u91CC\u5C31\u6709\u7B54\u6848\u4E86\u3002</p><p>\u7B2C\u4E00\u6B65\uFF0C\u5728 pom.xml \u6587\u4EF6\u4E2D\u6DFB\u52A0 AutoGenerator \u7684\u4F9D\u8D56\u3002</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><ul><li>\u914D\u7F6E\u6587\u4EF6\u81F3\u5C11\u5F97\u5305\u542B\u4E00\u4E2Acontext</li><li>commentGenerator \u7528\u6765\u914D\u7F6E\u751F\u6210\u7684\u6CE8\u91CA</li><li>jdbcConnection \u7528\u6765\u94FE\u63A5\u6570\u636E\u5E93</li><li>javaTypeResolver \u914D\u7F6E JDBC \u4E0E Java \u7684\u7C7B\u578B\u8F6C\u6362\u89C4\u5219</li><li>javaModelGenerator \u914D\u7F6E po \u751F\u6210\u7684\u5305\u8DEF\u5F84\u548C\u9879\u76EE\u8DEF\u5F84</li><li>sqlMapGenerator \u914D\u7F6E mapper.xml \u6587\u4EF6\u751F\u6210\u7684\u76EE\u5F55</li><li>javaClientGenerator \u914D\u7F6E mapper.java \u6587\u4EF6\u751F\u6210\u7684\u76EE\u5F55</li><li>\u4E00\u4E2A table \u5BF9\u5E94\u4E00\u5F20\u8868\uFF0C\u5982\u679C\u60F3\u540C\u65F6\u751F\u6210\u591A\u5F20\u8868\uFF0C\u9700\u8981\u914D\u7F6E\u591A\u4E2A table</li></ul><p>\u66F4\u591A\u914D\u7F6E\u4FE1\u606F\u53EF\u4EE5\u53C2\u7167\u4E0B\u9762\u8FD9\u7BC7\u6587\u7AE0\uFF1A</p>`,18),j={href:"https://juejin.cn/post/6844903982582743048",target:"_blank",rel:"noopener noreferrer"},x=a("https://juejin.cn/post/6844903982582743048"),M=t(`<p>\u5230\u6B64\u4E3A\u6B62\uFF0Cmybatis-generator-maven-plugin \u5C31\u7B97\u662F\u914D\u7F6E\u5B8C\u6210\u4E86\uFF0C\u5B8C\u6574\u5185\u5BB9\u5982\u4E0B\u56FE\u6240\u793A\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/kaiyuan/auto-generator-c09c7dcd-ab4e-437b-a512-a9e0bf1f533c.png" alt=""></p><p>\u914D\u7F6E\u5B8C\u6210\u540E\u53EF\u4EE5\u53CC\u51FB\u8FD0\u884C Maven \u7684\u63D2\u4EF6 Mybatis Generator\uFF0C\u6CA1\u6709\u95EE\u9898\u7684\u8BDD\uFF0C\u53EF\u4EE5\u770B\u5230\u751F\u6210\u540E\u7684\u6587\u4EF6\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/kaiyuan/auto-generator-843487f6-5823-4291-b6c3-b4f69b9bba51.png" alt=""></p><h2 id="\u518D\u4F53\u9A8C-mybatis-plus-\u7684-autogenerator" tabindex="-1"><a class="header-anchor" href="#\u518D\u4F53\u9A8C-mybatis-plus-\u7684-autogenerator" aria-hidden="true">#</a> \u518D\u4F53\u9A8C MyBatis-Plus \u7684 AutoGenerator</h2><p>MyBatis-Plus\uFF08\u7B80\u5199 MP\uFF09\u662F MyBatis \u7684\u589E\u5F3A\u5DE5\u5177\uFF0C\u5B98\u65B9\u5BA3\u79F0 MP \u548C MyBatis \u7684\u5173\u7CFB\u5C31\u597D\u50CF\u9B42\u6597\u7F57\u4E2D\u7684 1P \u548C 2P\uFF0C\u53EF\u8C13\u597D\u57FA\u53CB\uFF0C\u5929\u4E0B\u8D70\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/kaiyuan/auto-generator-7.png" alt=""></p><p>AutoGenerator \u662F MyBatis-Plus \u63A8\u51FA\u7684\u4EE3\u7801\u751F\u6210\u5668\uFF0C\u53EF\u4EE5\u5FEB\u901F\u751F\u6210 Entity\u3001Mapper\u3001Mapper XML\u3001Service\u3001Controller \u7B49\u5404\u4E2A\u6A21\u5757\u7684\u4EE3\u7801\uFF0C\u6BD4 Mybatis Generator \u66F4\u5F3A\u5927\uFF0C\u5F00\u53D1\u6548\u7387\u66F4\u9AD8\u3002</p><p>\u901A\u8FC7\u524D\u9762\u7684\u4F53\u9A8C\uFF0C\u60F3\u5FC5\u5927\u5BB6\u786E\u5B9E\u611F\u89C9\u5230\u4E86 Mybatis Generator \u7684\u7E41\u7410\uFF0C\u63A5\u4E0B\u6765\uFF0C\u6211\u4EEC\u6765\u4F53\u9A8C\u4E00\u4E0B AutoGenerator\uFF0C\u5BF9\u6BD4\u8FC7\u540E\uFF0C\u5927\u5BB6\u5FC3\u91CC\u5C31\u6709\u7B54\u6848\u4E86\u3002</p><p>\u7B2C\u4E00\u6B65\uFF0C\u5728 pom.xml \u6587\u4EF6\u4E2D\u6DFB\u52A0 AutoGenerator \u7684\u4F9D\u8D56\u3002</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
     &lt;groupId&gt;com.baomidou&lt;/groupId&gt;
     &lt;artifactId&gt;mybatis-plus-generator&lt;/artifactId&gt;
     &lt;version&gt;3.4.1&lt;/version&gt;
@@ -135,4 +135,4 @@ mpg<span class="token punctuation">.</span><span class="token function">setDataS
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 <span class="token class-name">PackageConfig</span> pc <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">PackageConfig</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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@@ -1,4 +1,4 @@
-import{_ as p}from"./plugin-vue_export-helper.21dcd24c.js";import{r as o,o as c,c as l,a,b as e,d as n,e as t}from"./app.a0271b9c.js";const i={},r=a("h1",{id:"java-\u652F\u6301\u7684-8-\u79CD\u57FA\u672C\u6570\u636E\u7C7B\u578B",tabindex:"-1"},[a("a",{class:"header-anchor",href:"#java-\u652F\u6301\u7684-8-\u79CD\u57FA\u672C\u6570\u636E\u7C7B\u578B","aria-hidden":"true"},"#"),n(" Java \u652F\u6301\u7684 8 \u79CD\u57FA\u672C\u6570\u636E\u7C7B\u578B")],-1),d=n("\u201C\u4E8C\u54E5\uFF0C"),u={href:"https://mp.weixin.qq.com/s/IgBpLGn0L1HZymgI4hWGVA",target:"_blank",rel:"noopener noreferrer"},k=n("\u4E0A\u4E00\u8282"),v=n("\u63D0\u5230\u4E86 Java \u53D8\u91CF\u7684\u6570\u636E\u7C7B\u578B\uFF0C\u662F\u4E0D\u662F\u6307\u5B9A\u4E86\u7C7B\u578B\u5C31\u9650\u5B9A\u4E86\u53D8\u91CF\u7684\u53D6\u503C\u8303\u56F4\u554A\uFF1F\u201D\u4E09\u59B9\u5438\u4E86\u4E00\u53E3\u9EA6\u9999\u53EF\u53EF\u5976\u8336\u540E\u5BF9\u6211\u8BF4\u3002"),m=t('<p>\u201C\u4E09\u59B9\uFF0C\u4F60\u4E0D\u5F97\u4E86\u554A\uFF0C\u957F\u8FDB\u5F88\u5927\u561B\uFF0C\u90FD\u5B66\u4F1A\u63A8\u7406\u5224\u65AD\u4E86\u3002Java \u662F\u4E00\u79CD\u9759\u6001\u7C7B\u578B\u7684\u7F16\u7A0B\u8BED\u8A00\uFF0C\u8FD9\u610F\u5473\u7740\u6240\u6709\u53D8\u91CF\u5FC5\u987B\u5728\u4F7F\u7528\u4E4B\u524D\u58F0\u660E\u597D\uFF0C\u4E5F\u5C31\u662F\u5FC5\u987B\u5F97\u5148\u6307\u5B9A\u53D8\u91CF\u7684\u7C7B\u578B\u548C\u540D\u79F0\u3002\u201D</p><p>Java \u4E2D\u7684\u6570\u636E\u7C7B\u578B\u53EF\u5206\u4E3A 2 \u79CD\uFF1A</p><p>1\uFF09<strong>\u57FA\u672C\u6570\u636E\u7C7B\u578B</strong>\u3002</p><p>\u57FA\u672C\u6570\u636E\u7C7B\u578B\u662F Java \u8BED\u8A00\u64CD\u4F5C\u6570\u636E\u7684\u57FA\u7840\uFF0C\u5305\u62EC boolean\u3001char\u3001byte\u3001short\u3001int\u3001long\u3001float \u548C double\uFF0C\u5171 8 \u79CD\u3002</p><p>2\uFF09<strong>\u5F15\u7528\u6570\u636E\u7C7B\u578B</strong>\u3002</p><p>\u9664\u4E86\u57FA\u672C\u6570\u636E\u7C7B\u578B\u4EE5\u5916\u7684\u7C7B\u578B\uFF0C\u90FD\u662F\u6240\u8C13\u7684\u5F15\u7528\u7C7B\u578B\u3002\u5E38\u89C1\u7684\u6709\u6570\u7EC4\uFF08\u5BF9\uFF0C\u6CA1\u9519\uFF0C\u6570\u7EC4\u662F\u5F15\u7528\u7C7B\u578B\uFF09\u3001class\uFF08\u4E5F\u5C31\u662F\u7C7B\uFF09\uFF0C\u4EE5\u53CA\u63A5\u53E3\uFF08\u6307\u5411\u7684\u662F\u5B9E\u73B0\u63A5\u53E3\u7684\u7C7B\u7684\u5BF9\u8C61\uFF09\u3002</p><p>\u6765\u4E2A\u601D\u7EF4\u5BFC\u56FE\uFF0C\u611F\u53D7\u4E0B\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/core-grammar/nine-01.png" alt=""></p>',8),b=n("\u901A\u8FC7"),g={href:"https://mp.weixin.qq.com/s/IgBpLGn0L1HZymgI4hWGVA",target:"_blank",rel:"noopener noreferrer"},h=n("\u4E0A\u4E00\u8282"),y=n("\u7684\u5B66\u4E60\uFF0C\u6211\u4EEC\u77E5\u9053\u53D8\u91CF\u53EF\u4EE5\u5206\u4E3A\u5C40\u90E8\u53D8\u91CF\u3001\u6210\u5458\u53D8\u91CF\u3001\u9759\u6001\u53D8\u91CF\u3002"),j=t(`<p>\u5F53\u53D8\u91CF\u662F\u5C40\u90E8\u53D8\u91CF\u7684\u65F6\u5019\uFF0C\u5FC5\u987B\u5F97\u5148\u521D\u59CB\u5316\uFF0C\u5426\u5219\u7F16\u8BD1\u5668\u4E0D\u5141\u8BB8\u4F60\u4F7F\u7528\u5B83\u3002\u62FF int \u6765\u4E3E\u4F8B\u5427\uFF0C\u770B\u4E0B\u56FE\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/core-grammar/nine-02.png" alt=""></p><p>\u5F53\u53D8\u91CF\u662F\u6210\u5458\u53D8\u91CF\u6216\u8005\u9759\u6001\u53D8\u91CF\u65F6\uFF0C\u53EF\u4EE5\u4E0D\u8FDB\u884C\u521D\u59CB\u5316\uFF0C\u5B83\u4EEC\u4F1A\u6709\u4E00\u4E2A\u9ED8\u8BA4\u503C\uFF0C\u4ECD\u7136\u4EE5 int \u4E3A\u4F8B\uFF0C\u6765\u770B\u4EE3\u7801\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token doc-comment comment">/**
+import{_ as p}from"./plugin-vue_export-helper.21dcd24c.js";import{r as o,o as c,c as l,a,b as e,d as n,e as t}from"./app.615e41d8.js";const i={},r=a("h1",{id:"java-\u652F\u6301\u7684-8-\u79CD\u57FA\u672C\u6570\u636E\u7C7B\u578B",tabindex:"-1"},[a("a",{class:"header-anchor",href:"#java-\u652F\u6301\u7684-8-\u79CD\u57FA\u672C\u6570\u636E\u7C7B\u578B","aria-hidden":"true"},"#"),n(" Java \u652F\u6301\u7684 8 \u79CD\u57FA\u672C\u6570\u636E\u7C7B\u578B")],-1),d=n("\u201C\u4E8C\u54E5\uFF0C"),u={href:"https://mp.weixin.qq.com/s/IgBpLGn0L1HZymgI4hWGVA",target:"_blank",rel:"noopener noreferrer"},k=n("\u4E0A\u4E00\u8282"),v=n("\u63D0\u5230\u4E86 Java \u53D8\u91CF\u7684\u6570\u636E\u7C7B\u578B\uFF0C\u662F\u4E0D\u662F\u6307\u5B9A\u4E86\u7C7B\u578B\u5C31\u9650\u5B9A\u4E86\u53D8\u91CF\u7684\u53D6\u503C\u8303\u56F4\u554A\uFF1F\u201D\u4E09\u59B9\u5438\u4E86\u4E00\u53E3\u9EA6\u9999\u53EF\u53EF\u5976\u8336\u540E\u5BF9\u6211\u8BF4\u3002"),m=t('<p>\u201C\u4E09\u59B9\uFF0C\u4F60\u4E0D\u5F97\u4E86\u554A\uFF0C\u957F\u8FDB\u5F88\u5927\u561B\uFF0C\u90FD\u5B66\u4F1A\u63A8\u7406\u5224\u65AD\u4E86\u3002Java \u662F\u4E00\u79CD\u9759\u6001\u7C7B\u578B\u7684\u7F16\u7A0B\u8BED\u8A00\uFF0C\u8FD9\u610F\u5473\u7740\u6240\u6709\u53D8\u91CF\u5FC5\u987B\u5728\u4F7F\u7528\u4E4B\u524D\u58F0\u660E\u597D\uFF0C\u4E5F\u5C31\u662F\u5FC5\u987B\u5F97\u5148\u6307\u5B9A\u53D8\u91CF\u7684\u7C7B\u578B\u548C\u540D\u79F0\u3002\u201D</p><p>Java \u4E2D\u7684\u6570\u636E\u7C7B\u578B\u53EF\u5206\u4E3A 2 \u79CD\uFF1A</p><p>1\uFF09<strong>\u57FA\u672C\u6570\u636E\u7C7B\u578B</strong>\u3002</p><p>\u57FA\u672C\u6570\u636E\u7C7B\u578B\u662F Java \u8BED\u8A00\u64CD\u4F5C\u6570\u636E\u7684\u57FA\u7840\uFF0C\u5305\u62EC boolean\u3001char\u3001byte\u3001short\u3001int\u3001long\u3001float \u548C double\uFF0C\u5171 8 \u79CD\u3002</p><p>2\uFF09<strong>\u5F15\u7528\u6570\u636E\u7C7B\u578B</strong>\u3002</p><p>\u9664\u4E86\u57FA\u672C\u6570\u636E\u7C7B\u578B\u4EE5\u5916\u7684\u7C7B\u578B\uFF0C\u90FD\u662F\u6240\u8C13\u7684\u5F15\u7528\u7C7B\u578B\u3002\u5E38\u89C1\u7684\u6709\u6570\u7EC4\uFF08\u5BF9\uFF0C\u6CA1\u9519\uFF0C\u6570\u7EC4\u662F\u5F15\u7528\u7C7B\u578B\uFF09\u3001class\uFF08\u4E5F\u5C31\u662F\u7C7B\uFF09\uFF0C\u4EE5\u53CA\u63A5\u53E3\uFF08\u6307\u5411\u7684\u662F\u5B9E\u73B0\u63A5\u53E3\u7684\u7C7B\u7684\u5BF9\u8C61\uFF09\u3002</p><p>\u6765\u4E2A\u601D\u7EF4\u5BFC\u56FE\uFF0C\u611F\u53D7\u4E0B\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/core-grammar/nine-01.png" alt=""></p>',8),b=n("\u901A\u8FC7"),g={href:"https://mp.weixin.qq.com/s/IgBpLGn0L1HZymgI4hWGVA",target:"_blank",rel:"noopener noreferrer"},h=n("\u4E0A\u4E00\u8282"),y=n("\u7684\u5B66\u4E60\uFF0C\u6211\u4EEC\u77E5\u9053\u53D8\u91CF\u53EF\u4EE5\u5206\u4E3A\u5C40\u90E8\u53D8\u91CF\u3001\u6210\u5458\u53D8\u91CF\u3001\u9759\u6001\u53D8\u91CF\u3002"),j=t(`<p>\u5F53\u53D8\u91CF\u662F\u5C40\u90E8\u53D8\u91CF\u7684\u65F6\u5019\uFF0C\u5FC5\u987B\u5F97\u5148\u521D\u59CB\u5316\uFF0C\u5426\u5219\u7F16\u8BD1\u5668\u4E0D\u5141\u8BB8\u4F60\u4F7F\u7528\u5B83\u3002\u62FF int \u6765\u4E3E\u4F8B\u5427\uFF0C\u770B\u4E0B\u56FE\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/core-grammar/nine-02.png" alt=""></p><p>\u5F53\u53D8\u91CF\u662F\u6210\u5458\u53D8\u91CF\u6216\u8005\u9759\u6001\u53D8\u91CF\u65F6\uFF0C\u53EF\u4EE5\u4E0D\u8FDB\u884C\u521D\u59CB\u5316\uFF0C\u5B83\u4EEC\u4F1A\u6709\u4E00\u4E2A\u9ED8\u8BA4\u503C\uFF0C\u4ECD\u7136\u4EE5 int \u4E3A\u4F8B\uFF0C\u6765\u770B\u4EE3\u7801\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token doc-comment comment">/**
  * <span class="token keyword">@author</span> \u5FAE\u4FE1\u641C\u300C\u6C89\u9ED8\u738B\u4E8C\u300D\uFF0C\u56DE\u590D\u5173\u952E\u5B57 PDF
  */</span>
 <span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">LocalVar</span> <span class="token punctuation">{</span>
diff --git a/dist/assets/bat-shuati.html.01dded07.js b/dist/assets/bat-shuati.html.01dded07.js
new file mode 100644
index 00000000..4679cdeb
--- /dev/null
+++ b/dist/assets/bat-shuati.html.01dded07.js
@@ -0,0 +1 @@
+const t={key:"v-6ef55906",path:"/download/bat-shuati.html",title:"\u{1F44F}\u4E0B\u8F7D\u2192BAT\u5927\u4F6C\u7684\u5237\u9898\u7B14\u8BB0",lang:"zh-CN",frontmatter:{title:"\u{1F44F}\u4E0B\u8F7D\u2192BAT\u5927\u4F6C\u7684\u5237\u9898\u7B14\u8BB0",shortTitle:"BAT\u5927\u4F6C\u7684\u5237\u9898\u7B14\u8BB0",category:["\u5B66\u4E60\u8D44\u6E90"],tag:["PDF"],summary:'\u5927\u5BB6\u5E94\u8BE5\u90FD\u77E5\u9053\uFF0C\u73B0\u5728\u7684\u4E92\u8054\u7F51\u516C\u53F8\u9762\u8BD5\uFF0C\u53EA\u8981\u662F\u7814\u53D1\u5C97\u4F4D\uFF0C\u57FA\u672C\u4E0A\u90FD\u8DD1\u4E0D\u4E86\u7B97\u6CD5\u9898\u7684\u6298\u78E8\uFF0C\u6240\u4EE5\u5927\u5BB6\u5728\u51C6\u5907\u6821\u62DB\u548C\u793E\u62DB\u7684\u65F6\u5019\uFF0C\u6216\u8005\u4E1A\u4F59\u65F6\u95F4\uFF0C\u8FD8\u662F\u8981\u591A\u5237\u5237 LeetCode\uFF0C\u4FDD\u6301\u72B6\u6001\u7684\u3002 \u9700\u8981\u5237\u9898\u7B14\u8BB0\u7684\u5C0F\u4F19\u4F34\u8BF7\u626B\u63CF\u4E0B\u65B9\u7684\u4E8C\u7EF4\u7801\u5173\u6CE8\u4F5C\u8005\u7684\u539F\u521B\u516C\u4F17\u53F7\u300C\u6C89\u9ED8\u738B\u4E8C\u300D\u56DE\u590D\u5173\u952E\u5B57\u300C100\u300D\u5C31\u53EF\u4EE5\u62C9\u53D6\u5230\u4E0B\u8F7D\u94FE\u63A5\u4E86\u3002 " \u4E8C\u54E5\uFF0C\u53BB\u5E74\u6821\u62DB\u524D\u51C6\u5907\u7B97\u6CD5\u65F6\uFF0C\u6211\u5728 LeetCode \u4E0A\u5237\u4E86\u5F88\u591A\u9898\uFF0C',head:[["meta",{property:"og:url",content:"https://tobebetterjavaer.com/download/bat-shuati.html"}],["meta",{property:"og:site_name",content:"Java \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF"}],["meta",{property:"og:title",content:"\u{1F44F}\u4E0B\u8F7D\u2192BAT\u5927\u4F6C\u7684\u5237\u9898\u7B14\u8BB0"}],["meta",{property:"og:type",content:"article"}],["meta",{property:"og:updated_time",content:"2022-06-11T12:15:48.000Z"}],["meta",{property:"og:locale",content:"zh-CN"}],["meta",{property:"article:tag",content:"PDF"}],["meta",{property:"article:modified_time",content:"2022-06-11T12:15:48.000Z"}]]},excerpt:"",headers:[],git:{createdTime:1647569962e3,updatedTime:1654949748e3,contributors:[{name:"itwanger",email:"www.qing_gee@163.com",commits:2}]},readingTime:{minutes:3.31,words:993},filePathRelative:"download/bat-shuati.md"};export{t as data};
diff --git a/dist/assets/bat-shuati.html.214e49f5.js b/dist/assets/bat-shuati.html.214e49f5.js
new file mode 100644
index 00000000..6b58e4b1
--- /dev/null
+++ b/dist/assets/bat-shuati.html.214e49f5.js
@@ -0,0 +1 @@
+import{_ as e}from"./plugin-vue_export-helper.21dcd24c.js";import{o as t,c as o,e as a}from"./app.615e41d8.js";const r={},p=a('<p><strong>\u5927\u5BB6\u5E94\u8BE5\u90FD\u77E5\u9053\uFF0C\u73B0\u5728\u7684\u4E92\u8054\u7F51\u516C\u53F8\u9762\u8BD5\uFF0C\u53EA\u8981\u662F\u7814\u53D1\u5C97\u4F4D\uFF0C\u57FA\u672C\u4E0A\u90FD\u8DD1\u4E0D\u4E86\u7B97\u6CD5\u9898\u7684\u6298\u78E8\uFF0C\u6240\u4EE5\u5927\u5BB6\u5728\u51C6\u5907\u6821\u62DB\u548C\u793E\u62DB\u7684\u65F6\u5019\uFF0C\u6216\u8005\u4E1A\u4F59\u65F6\u95F4\uFF0C\u8FD8\u662F\u8981\u591A\u5237\u5237 LeetCode\uFF0C\u4FDD\u6301\u72B6\u6001\u7684</strong>\u3002</p><p>\u9700\u8981\u5237\u9898\u7B14\u8BB0\u7684\u5C0F\u4F19\u4F34\u8BF7\u626B\u63CF\u4E0B\u65B9\u7684\u4E8C\u7EF4\u7801\u5173\u6CE8\u4F5C\u8005\u7684\u539F\u521B\u516C\u4F17\u53F7\u300C<strong>\u6C89\u9ED8\u738B\u4E8C</strong>\u300D\u56DE\u590D\u5173\u952E\u5B57\u300C<strong>100</strong>\u300D\u5C31\u53EF\u4EE5\u62C9\u53D6\u5230\u4E0B\u8F7D\u94FE\u63A5\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongzhonghao.png" alt="\u626B\u7801\u5173\u6CE8\u540E\u56DE\u590D\u300C100\u300D\u5173\u952E\u5B57"></p><blockquote><p>\u4E8C\u54E5\uFF0C\u53BB\u5E74\u6821\u62DB\u524D\u51C6\u5907\u7B97\u6CD5\u65F6\uFF0C\u6211\u5728 LeetCode \u4E0A\u5237\u4E86\u5F88\u591A\u9898\uFF0C\u4F46\u603B\u611F\u89C9\u9898\u867D\u7136\u5237\u4E86\u5F88\u591A\uFF0C\u89E3\u9898\u80FD\u529B\u5374\u6CA1\u600E\u4E48\u63D0\u9AD8\uFF0C\u600E\u4E48\u89E3\u51B3\u8FD9\u79CD\u5237\u9898\u6548\u7387\u4F4E\u4E0B\u7684\u95EE\u9898\u5462\uFF1F</p></blockquote><p>\u8FD9\u662F\u4E09\u4E2A\u6708\u524D\u4E00\u4E2A\u8BFB\u8005\u7ED9\u6211\u7684\u79C1\u4FE1\uFF0C\u4ED6\u7684\u56F0\u60D1\u8BA9\u6211\u5FC3\u6709\u621A\u621A\u7109\uFF01\u4E8E\u662F\u6211\u8D76\u7D27\u95EE\u4E86\u8EAB\u8FB9\u7684\u4E00\u4E9B\u5C31\u804C\u4E8E\u5927\u5382\u7684\u670B\u53CB\uFF0C\u4ED6\u4EEC\u4E0D\u7EA6\u800C\u540C\u5730\u7ED9\u6211\u63A8\u8350\u4E86\u8FD9\u4EFD\u5237\u9898\u7B14\u8BB0\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/download/bat-shuati-3660f789-59a4-4310-b565-8253be370904.jpg" alt=""></p><p>\u7EC6\u81F4\u5730\u7814\u7A76\u4E86\u4E00\u5468\u540E\uFF0C\u6211\u611F\u89C9\u53D1\u73B0\u4E86\u5B9D\u85CF\uFF01\u8D76\u7D27\u53D1\u7ED9\u4E86\u8FD9\u4F4D\u8BFB\u8005\u3002\u524D\u5929\uFF0C\u4ED6\u56DE\u590D\u6211\u4E86\uFF0C\u8BF4\uFF1A\u201C\u4E8C\u54E5\uFF0C\u4F60\u592A\u5F3A\u4E86\uFF0C<strong>\u8FD9\u5237\u9898\u7B14\u8BB0\u597D\u4F7F\u554A</strong>\u3002\u6211\u6309\u7167\u4E0A\u9762\u63D0\u4F9B\u7684\u65B9\u6CD5\u8BA4\u771F\u5730\u5237\u4E86\u4E24\u4E2A\u6708\u7684\u65F6\u95F4\uFF0C\u60CA\u5947\u5730\u53D1\u73B0\u7B97\u6CD5\u80FD\u529B\u63D0\u9AD8\u4E86\uFF0C\u5237 LeetCode \u4E0A\u4E2D\u7B49\u96BE\u5EA6\u7684\u9898\u76EE\u57FA\u672C\u4E0D\u4F1A\u88AB\u5361\u4F4F\u4E86\uFF01\u201D</p><p>\u542C\u4ED6\u8FD9\u4E48\u4E00\u8BF4\uFF0C\u6211\u5C31\u6709\u4FE1\u5FC3\u4E86\uFF0C\u8D76\u7D27\u7ED9\u6211\u516C\u4F17\u53F7\u7684\u8BFB\u8005\u670B\u53CB\u4EEC\u5206\u4EAB\u4E00\u4E0B\u3002</p><p>\u8FD9\u672C\u7B14\u8BB0\u7684\u4F5C\u8005\u5728 LeetCode \u5237\u4E86\u51E0\u767E\u9053\u9898\uFF0C\u5E76\u4E14\u5C06\u9898\u76EE\u5206\u95E8\u522B\u7C7B\u5730\u6574\u7406\u597D\u4E86\u3002\u5305\u542B\u4E86 LeetCode Online Judge \u6240\u6709\u9898\u76EE\u7684\u7B54\u6848\uFF0C\u6240\u6709\u7684\u4EE3\u7801\u5B9E\u73B0\u662F\u975E\u5E38\u4F18\u96C5\u4E14\u6267\u884C\u6548\u7387\u6781\u9AD8\u7684\u3002</p><p>\u4E0D\u7BA1\u4F60\u4F7F\u7528\u7684\u7F16\u7A0B\u8BED\u8A00\u662F Java\u3001C++\uFF0C\u8FD8\u662F Go\uFF0C\u90FD\u53EF\u4EE5\u5B66\u4E60\uFF0C\u9002\u5408\u5237\u9898\u7684\u540C\u5B66\u53CD\u590D\u5B66\u4E60\u3002\u8BA4\u771F\u5730\u63E3\u6469\u5176\u4E2D\u7684\u6846\u67B6\u601D\u7EF4\uFF0C\u4F60\u4F1A\u53D1\u73B0\uFF0C\u8FD9\u662F\u4E00\u672C\u975E\u5E38\u7528\u5FC3\u7684\u5237\u9898\u7C7B\u4E66\u7C4D\u3002\u7B14\u8BB0\u603B\u5171 1200 \u9875\uFF0C\u5206\u7F16\u7A0B\u6280\u5DE7\u3001\u7EBF\u6027\u8868\u3001\u5B57\u7B26\u4E32\u3001\u6808\u961F\u5217\u3001\u6811\u3001\u6392\u5E8F\u3001\u67E5\u627E\u3001BFS\u3001DFS\u3001\u8D2A\u5FC3\u3001\u52A8\u6001\u89C4\u5212\u7B49\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/download/bat-shuati-8941c10e-e9de-4b50-a6e8-7b50c2a142f7.jpg" alt=""></p><p>\u6BCF\u4E2A\u7AE0\u8282\u90FD\u4F1A\u5148\u8BB2\u89E3\u6846\u67B6\u601D\u7EF4\uFF0C\u7136\u540E\u6311\u9009\u975E\u5E38\u5178\u578B\u7684\u5341\u51E0\u9053 LeetCode \u9898\u8FDB\u884C\u5B9E\u6218\u8BB2\u89E3\u3002\u8FD9\u4EFD\u7B14\u8BB0\u4E0D\u4EC5\u6392\u7248\u5341\u5206\u7CBE\u7F8E\uFF0C\u5185\u5BB9\u4E5F\u5F02\u5E38\u5145\u5B9E\uFF0C\u6BCF\u4E00\u9898\u90FD\u662F\u7EC6\u81F4\u7684\u8BB2\u89E3\uFF0C\u6709\u65F6\u5019\u8FD8\u4F1A\u914D\u4E0A\u56FE\u7247\uFF0C\u5C31\u6015\u4F60\u641E\u4E0D\u61C2\uFF0C\u5927\u5927\u7684\u826F\u5FC3\u554A\uFF01</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/download/bat-shuati-f2a840fd-a372-4de9-b420-4335a9e0316e.jpg" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/download/bat-shuati-2e751738-1c8d-43b3-8e9b-d7593b62a55e.jpg" alt=""></p><p>\u4EE5\u524D\u5462\uFF0C\u6211\u4E5F\u5F88\u8BA8\u538C\u5237\u9898\uFF0C\u89C9\u5F97\u8FD9\u5C31\u50CF\u53E4\u4EE3\u7684\u516B\u80A1\u6587\u4E00\u6837\uFF0C\u53C8\u81ED\u53C8\u523B\u677F\uFF0C\u4F46\u4E92\u8054\u7F51\u7684\u516C\u53F8\u90FD\u559C\u6B22\u8FD9\u4E48\u8003\uFF0C\u56E0\u4E3A\u786E\u5B9E\u4E5F\u627E\u4E0D\u5230\u66F4\u597D\u7684\u66FF\u4EE3\u65B9\u6848\uFF0C\u90A3\u5982\u679C\u4F60\u4E0D\u51C6\u5907\u4E0D\u53BB\u5237 LeetCode \u7684\u8BDD\uFF0C\u9762\u8BD5\u5FC5\u5B9A\u6302\u554A\uFF01</p><p>\u7ECF\u5E38\u5237\u9898\u7684\u8BFB\u8005\u53EF\u80FD\u4F1A\u77E5\u9053\uFF0CBeats 100% \u662F\u5F88\u6709\u96BE\u5EA6\u7684\uFF1A</p><ul><li>\u4EE3\u7801\u8981\u8A00\u7B80\u610F\u8D45\uFF0C\u4E00\u9488\u89C1\u8840</li><li>\u7B97\u6CD5\u5FC5\u987B\u662F\u6700\u4F18\u89E3</li></ul><p>\u90A3<strong>\u8FD9\u4EFD\u5237\u9898\u7B14\u8BB0\u4E2D\u6240\u6709\u9898\u76EE\u7684\u89E3\u7B54\uFF0C\u90FD\u662F Beats 100%</strong>\uFF0C\u8FD9\u4E00\u70B9\u975E\u5E38\u96BE\u80FD\u53EF\u8D35\uFF01\u4E5F\u5C31\u662F\u8BF4\uFF0C\u8FD9\u4EFD\u5237\u9898\u7B14\u8BB0\u4E2D\u7684\u89E3\u7B54\u90FD\u662F\u5927\u5382\u8003\u6838\u65F6\u5019\u7684\u6807\u51C6\u7B54\u6848\uFF0C\u5982\u679C\u8BF4\u4F60\u5403\u900F\u4E86\u8FD9\u4EFD\u5237\u9898\u7B14\u8BB0\uFF0C\u53EF\u4EE5\u540A\u6253\u9762\u8BD5\u5B98\u4E86\u2014\u2014\u5F53\u7136\u4E86\uFF0C\u5403\u900F\u4F1A\u6BD4\u8F83\u96BE\uFF0C\u4F46\u5982\u679C\u80FD\u5E94\u4ED8\u9762\u8BD5\uFF0C\u5C31\u76F4\u4E86\u5440\uFF0C\u4E0D\u4E0D\u4E0D\uFF0C\u5C31\u503C\u4E86\u5440\uFF01</p><p>\u4E8C\u54E5\u5DF2\u7ECF\u628A\u8FD9\u4EFD\u5237\u9898\u7B14\u8BB0\u4E0B\u8F7D\u597D\u4E86\uFF0C\u9700\u8981\u7684\u5C0F\u4F19\u4F34\u8BF7\u626B\u63CF\u4E0B\u65B9\u7684\u4E8C\u7EF4\u7801\u5173\u6CE8\u4F5C\u8005\u7684\u539F\u521B\u516C\u4F17\u53F7\u300C<strong>\u6C89\u9ED8\u738B\u4E8C</strong>\u300D\u56DE\u590D\u5173\u952E\u5B57\u300C<strong>100</strong>\u300D\u5C31\u53EF\u4EE5\u62C9\u53D6\u5230\u4E0B\u8F7D\u94FE\u63A5\u4E86\uFF08\u65E0\u5957\u8DEF\uFF0C\u6CA1\u52A0\u5BC6\uFF09\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongzhonghao.png" alt="\u626B\u7801\u5173\u6CE8\u540E\u56DE\u590D\u300C100\u300D\u5173\u952E\u5B57"></p><blockquote><p>\u7B14\u8BB0\u7248\u6743\u5F52\u539F\u4F5C\u8005\uFF08\u971C\u795E\uFF09\u6240\u6709\uFF0C\u51FA\u5904\uFF1Ahttps://books.halfrost.com/leetcode/</p></blockquote>',21),s=[p];function n(b,c){return t(),o("div",null,s)}var i=e(r,[["render",n],["__file","bat-shuati.html.vue"]]);export{i as default};
diff --git a/dist/assets/bat-shuati.html.adba9635.js b/dist/assets/bat-shuati.html.adba9635.js
deleted file mode 100644
index 27925843..00000000
--- a/dist/assets/bat-shuati.html.adba9635.js
+++ /dev/null
@@ -1 +0,0 @@
-const t={key:"v-6ef55906",path:"/download/bat-shuati.html",title:"BAT\u5927\u4F6C\u7684\u5237\u9898\u7B14\u8BB0",lang:"zh-CN",frontmatter:{title:"BAT\u5927\u4F6C\u7684\u5237\u9898\u7B14\u8BB0",category:["\u5B66\u4E60\u8D44\u6E90"],tag:["PDF"],summary:'\u5927\u5BB6\u5E94\u8BE5\u90FD\u77E5\u9053\uFF0C\u73B0\u5728\u7684\u4E92\u8054\u7F51\u516C\u53F8\u9762\u8BD5\uFF0C\u53EA\u8981\u662F\u7814\u53D1\u5C97\u4F4D\uFF0C\u57FA\u672C\u4E0A\u90FD\u8DD1\u4E0D\u4E86\u7B97\u6CD5\u9898\u7684\u6298\u78E8\uFF0C\u6240\u4EE5\u5927\u5BB6\u5728\u51C6\u5907\u6821\u62DB\u548C\u793E\u62DB\u7684\u65F6\u5019\uFF0C\u6216\u8005\u4E1A\u4F59\u65F6\u95F4\uFF0C\u8FD8\u662F\u8981\u591A\u5237\u5237 LeetCode\uFF0C\u4FDD\u6301\u72B6\u6001\u7684\u3002 \u9700\u8981\u5237\u9898\u7B14\u8BB0\u7684\u5C0F\u4F19\u4F34\u8BF7\u626B\u63CF\u4E0B\u65B9\u7684\u4E8C\u7EF4\u7801\u5173\u6CE8\u4F5C\u8005\u7684\u539F\u521B\u516C\u4F17\u53F7\u300C\u6C89\u9ED8\u738B\u4E8C\u300D\u56DE\u590D\u5173\u952E\u5B57\u300C100\u300D\u5C31\u53EF\u4EE5\u62C9\u53D6\u5230\u4E0B\u8F7D\u94FE\u63A5\u4E86\u3002 " \u4E8C\u54E5\uFF0C\u53BB\u5E74\u6821\u62DB\u524D\u51C6\u5907\u7B97\u6CD5\u65F6\uFF0C\u6211\u5728 LeetCode \u4E0A\u5237\u4E86\u5F88\u591A\u9898\uFF0C',head:[["meta",{property:"og:url",content:"https://tobebetterjavaer.com/download/bat-shuati.html"}],["meta",{property:"og:site_name",content:"Java \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF"}],["meta",{property:"og:title",content:"BAT\u5927\u4F6C\u7684\u5237\u9898\u7B14\u8BB0"}],["meta",{property:"og:type",content:"article"}],["meta",{property:"og:updated_time",content:"2022-03-18T02:19:22.000Z"}],["meta",{property:"og:locale",content:"zh-CN"}],["meta",{property:"article:tag",content:"PDF"}],["meta",{property:"article:modified_time",content:"2022-03-18T02:19:22.000Z"}]]},excerpt:"",headers:[],git:{createdTime:1647569962e3,updatedTime:1647569962e3,contributors:[{name:"itwanger",email:"www.qing_gee@163.com",commits:1}]},readingTime:{minutes:3.34,words:1001},filePathRelative:"download/bat-shuati.md"};export{t as data};
diff --git a/dist/assets/bat-shuati.html.bf129827.js b/dist/assets/bat-shuati.html.bf129827.js
deleted file mode 100644
index fc30ff12..00000000
--- a/dist/assets/bat-shuati.html.bf129827.js
+++ /dev/null
@@ -1 +0,0 @@
-import{_ as e}from"./plugin-vue_export-helper.21dcd24c.js";import{o as t,c as o,e as a}from"./app.a0271b9c.js";const p={},s=a('<p><strong>\u5927\u5BB6\u5E94\u8BE5\u90FD\u77E5\u9053\uFF0C\u73B0\u5728\u7684\u4E92\u8054\u7F51\u516C\u53F8\u9762\u8BD5\uFF0C\u53EA\u8981\u662F\u7814\u53D1\u5C97\u4F4D\uFF0C\u57FA\u672C\u4E0A\u90FD\u8DD1\u4E0D\u4E86\u7B97\u6CD5\u9898\u7684\u6298\u78E8\uFF0C\u6240\u4EE5\u5927\u5BB6\u5728\u51C6\u5907\u6821\u62DB\u548C\u793E\u62DB\u7684\u65F6\u5019\uFF0C\u6216\u8005\u4E1A\u4F59\u65F6\u95F4\uFF0C\u8FD8\u662F\u8981\u591A\u5237\u5237 LeetCode\uFF0C\u4FDD\u6301\u72B6\u6001\u7684</strong>\u3002</p><p>\u9700\u8981\u5237\u9898\u7B14\u8BB0\u7684\u5C0F\u4F19\u4F34\u8BF7\u626B\u63CF\u4E0B\u65B9\u7684\u4E8C\u7EF4\u7801\u5173\u6CE8\u4F5C\u8005\u7684\u539F\u521B\u516C\u4F17\u53F7\u300C<strong>\u6C89\u9ED8\u738B\u4E8C</strong>\u300D\u56DE\u590D\u5173\u952E\u5B57\u300C<strong>100</strong>\u300D\u5C31\u53EF\u4EE5\u62C9\u53D6\u5230\u4E0B\u8F7D\u94FE\u63A5\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongzhonghao.png" alt="\u626B\u7801\u5173\u6CE8\u540E\u56DE\u590D\u300C100\u300D\u5173\u952E\u5B57"></p><blockquote><p>\u4E8C\u54E5\uFF0C\u53BB\u5E74\u6821\u62DB\u524D\u51C6\u5907\u7B97\u6CD5\u65F6\uFF0C\u6211\u5728 LeetCode \u4E0A\u5237\u4E86\u5F88\u591A\u9898\uFF0C\u4F46\u603B\u611F\u89C9\u9898\u867D\u7136\u5237\u4E86\u5F88\u591A\uFF0C\u89E3\u9898\u80FD\u529B\u5374\u6CA1\u600E\u4E48\u63D0\u9AD8\uFF0C\u600E\u4E48\u89E3\u51B3\u8FD9\u79CD\u5237\u9898\u6548\u7387\u4F4E\u4E0B\u7684\u95EE\u9898\u5462\uFF1F</p></blockquote><p>\u8FD9\u662F\u4E09\u4E2A\u6708\u524D\u4E00\u4E2A\u8BFB\u8005\u7ED9\u6211\u7684\u79C1\u4FE1\uFF0C\u4ED6\u7684\u56F0\u60D1\u8BA9\u6211\u5FC3\u6709\u621A\u621A\u7109\uFF01\u4E8E\u662F\u6211\u8D76\u7D27\u95EE\u4E86\u8EAB\u8FB9\u7684\u4E00\u4E9B\u5C31\u804C\u4E8E\u5927\u5382\u7684\u670B\u53CB\uFF0C\u4ED6\u4EEC\u4E0D\u7EA6\u800C\u540C\u5730\u7ED9\u6211\u63A8\u8350\u4E86\u8FD9\u4EFD\u5237\u9898\u7B14\u8BB0\u3002</p><p><img src="https://upload-images.jianshu.io/upload_images/1179389-1a258005b1ace2ff?imageMogr2/auto-orient/strip|imageView2/2/w/1240" alt=""></p><p>\u7EC6\u81F4\u5730\u7814\u7A76\u4E86\u4E00\u5468\u540E\uFF0C\u6211\u611F\u89C9\u53D1\u73B0\u4E86\u5B9D\u85CF\uFF01\u8D76\u7D27\u53D1\u7ED9\u4E86\u8FD9\u4F4D\u8BFB\u8005\u3002\u524D\u5929\uFF0C\u4ED6\u56DE\u590D\u6211\u4E86\uFF0C\u8BF4\uFF1A\u201C\u4E8C\u54E5\uFF0C\u4F60\u592A\u5F3A\u4E86\uFF0C<strong>\u8FD9\u5237\u9898\u7B14\u8BB0\u597D\u4F7F\u554A</strong>\u3002\u6211\u6309\u7167\u4E0A\u9762\u63D0\u4F9B\u7684\u65B9\u6CD5\u8BA4\u771F\u5730\u5237\u4E86\u4E24\u4E2A\u6708\u7684\u65F6\u95F4\uFF0C\u60CA\u5947\u5730\u53D1\u73B0\u7B97\u6CD5\u80FD\u529B\u63D0\u9AD8\u4E86\uFF0C\u5237 LeetCode \u4E0A\u4E2D\u7B49\u96BE\u5EA6\u7684\u9898\u76EE\u57FA\u672C\u4E0D\u4F1A\u88AB\u5361\u4F4F\u4E86\uFF01\u201D</p><p>\u542C\u4ED6\u8FD9\u4E48\u4E00\u8BF4\uFF0C\u6211\u5C31\u6709\u4FE1\u5FC3\u4E86\uFF0C\u8D76\u7D27\u7ED9\u6211\u516C\u4F17\u53F7\u7684\u8BFB\u8005\u670B\u53CB\u4EEC\u5206\u4EAB\u4E00\u4E0B\u3002</p><p>\u8FD9\u672C\u7B14\u8BB0\u7684\u4F5C\u8005\u5728 LeetCode \u5237\u4E86\u51E0\u767E\u9053\u9898\uFF0C\u5E76\u4E14\u5C06\u9898\u76EE\u5206\u95E8\u522B\u7C7B\u5730\u6574\u7406\u597D\u4E86\u3002\u5305\u542B\u4E86 LeetCode Online Judge \u6240\u6709\u9898\u76EE\u7684\u7B54\u6848\uFF0C\u6240\u6709\u7684\u4EE3\u7801\u5B9E\u73B0\u662F\u975E\u5E38\u4F18\u96C5\u4E14\u6267\u884C\u6548\u7387\u6781\u9AD8\u7684\u3002</p><p>\u4E0D\u7BA1\u4F60\u4F7F\u7528\u7684\u7F16\u7A0B\u8BED\u8A00\u662F Java\u3001C++\uFF0C\u8FD8\u662F Go\uFF0C\u90FD\u53EF\u4EE5\u5B66\u4E60\uFF0C\u9002\u5408\u5237\u9898\u7684\u540C\u5B66\u53CD\u590D\u5B66\u4E60\u3002\u8BA4\u771F\u5730\u63E3\u6469\u5176\u4E2D\u7684\u6846\u67B6\u601D\u7EF4\uFF0C\u4F60\u4F1A\u53D1\u73B0\uFF0C\u8FD9\u662F\u4E00\u672C\u975E\u5E38\u7528\u5FC3\u7684\u5237\u9898\u7C7B\u4E66\u7C4D\u3002\u7B14\u8BB0\u603B\u5171 1200 \u9875\uFF0C\u5206\u7F16\u7A0B\u6280\u5DE7\u3001\u7EBF\u6027\u8868\u3001\u5B57\u7B26\u4E32\u3001\u6808\u961F\u5217\u3001\u6811\u3001\u6392\u5E8F\u3001\u67E5\u627E\u3001BFS\u3001DFS\u3001\u8D2A\u5FC3\u3001\u52A8\u6001\u89C4\u5212\u7B49\u3002</p><p><img src="https://upload-images.jianshu.io/upload_images/1179389-5903188fb91d382a?imageMogr2/auto-orient/strip|imageView2/2/w/1240" alt=""></p><p>\u6BCF\u4E2A\u7AE0\u8282\u90FD\u4F1A\u5148\u8BB2\u89E3\u6846\u67B6\u601D\u7EF4\uFF0C\u7136\u540E\u6311\u9009\u975E\u5E38\u5178\u578B\u7684\u5341\u51E0\u9053 LeetCode \u9898\u8FDB\u884C\u5B9E\u6218\u8BB2\u89E3\u3002\u8FD9\u4EFD\u7B14\u8BB0\u4E0D\u4EC5\u6392\u7248\u5341\u5206\u7CBE\u7F8E\uFF0C\u5185\u5BB9\u4E5F\u5F02\u5E38\u5145\u5B9E\uFF0C\u6BCF\u4E00\u9898\u90FD\u662F\u7EC6\u81F4\u7684\u8BB2\u89E3\uFF0C\u6709\u65F6\u5019\u8FD8\u4F1A\u914D\u4E0A\u56FE\u7247\uFF0C\u5C31\u6015\u4F60\u641E\u4E0D\u61C2\uFF0C\u5927\u5927\u7684\u826F\u5FC3\u554A\uFF01</p><p><img src="https://upload-images.jianshu.io/upload_images/1179389-38d3c702ad2c6db5?imageMogr2/auto-orient/strip|imageView2/2/w/1240" alt=""></p><p><img src="https://upload-images.jianshu.io/upload_images/1179389-e69bdf5643318d02?imageMogr2/auto-orient/strip|imageView2/2/w/1240" alt=""></p><p>\u4EE5\u524D\u5462\uFF0C\u6211\u4E5F\u5F88\u8BA8\u538C\u5237\u9898\uFF0C\u89C9\u5F97\u8FD9\u5C31\u50CF\u53E4\u4EE3\u7684\u516B\u80A1\u6587\u4E00\u6837\uFF0C\u53C8\u81ED\u53C8\u523B\u677F\uFF0C\u4F46\u4E92\u8054\u7F51\u7684\u516C\u53F8\u90FD\u559C\u6B22\u8FD9\u4E48\u8003\uFF0C\u56E0\u4E3A\u786E\u5B9E\u4E5F\u627E\u4E0D\u5230\u66F4\u597D\u7684\u66FF\u4EE3\u65B9\u6848\uFF0C\u90A3\u5982\u679C\u4F60\u4E0D\u51C6\u5907\u4E0D\u53BB\u5237 LeetCode \u7684\u8BDD\uFF0C\u9762\u8BD5\u5FC5\u5B9A\u6302\u554A\uFF01</p><p>\u7ECF\u5E38\u5237\u9898\u7684\u8BFB\u8005\u53EF\u80FD\u4F1A\u77E5\u9053\uFF0CBeats 100% \u662F\u5F88\u6709\u96BE\u5EA6\u7684\uFF1A</p><ul><li>\u4EE3\u7801\u8981\u8A00\u7B80\u610F\u8D45\uFF0C\u4E00\u9488\u89C1\u8840</li><li>\u7B97\u6CD5\u5FC5\u987B\u662F\u6700\u4F18\u89E3</li></ul><p>\u90A3<strong>\u8FD9\u4EFD\u5237\u9898\u7B14\u8BB0\u4E2D\u6240\u6709\u9898\u76EE\u7684\u89E3\u7B54\uFF0C\u90FD\u662F Beats 100%</strong>\uFF0C\u8FD9\u4E00\u70B9\u975E\u5E38\u96BE\u80FD\u53EF\u8D35\uFF01\u4E5F\u5C31\u662F\u8BF4\uFF0C\u8FD9\u4EFD\u5237\u9898\u7B14\u8BB0\u4E2D\u7684\u89E3\u7B54\u90FD\u662F\u5927\u5382\u8003\u6838\u65F6\u5019\u7684\u6807\u51C6\u7B54\u6848\uFF0C\u5982\u679C\u8BF4\u4F60\u5403\u900F\u4E86\u8FD9\u4EFD\u5237\u9898\u7B14\u8BB0\uFF0C\u53EF\u4EE5\u540A\u6253\u9762\u8BD5\u5B98\u4E86\u2014\u2014\u5F53\u7136\u4E86\uFF0C\u5403\u900F\u4F1A\u6BD4\u8F83\u96BE\uFF0C\u4F46\u5982\u679C\u80FD\u5E94\u4ED8\u9762\u8BD5\uFF0C\u5C31\u76F4\u4E86\u5440\uFF0C\u4E0D\u4E0D\u4E0D\uFF0C\u5C31\u503C\u4E86\u5440\uFF01</p><p>\u4E8C\u54E5\u5DF2\u7ECF\u628A\u8FD9\u4EFD\u5237\u9898\u7B14\u8BB0\u4E0B\u8F7D\u597D\u4E86\uFF0C\u9700\u8981\u7684\u5C0F\u4F19\u4F34\u8BF7\u626B\u63CF\u4E0B\u65B9\u7684\u4E8C\u7EF4\u7801\u5173\u6CE8\u4F5C\u8005\u7684\u539F\u521B\u516C\u4F17\u53F7\u300C<strong>\u6C89\u9ED8\u738B\u4E8C</strong>\u300D\u56DE\u590D\u5173\u952E\u5B57\u300C<strong>100</strong>\u300D\u5C31\u53EF\u4EE5\u62C9\u53D6\u5230\u4E0B\u8F7D\u94FE\u63A5\u4E86\uFF08\u65E0\u5957\u8DEF\uFF0C\u6CA1\u52A0\u5BC6\uFF09\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongzhonghao.png" alt="\u626B\u7801\u5173\u6CE8\u540E\u56DE\u590D\u300C100\u300D\u5173\u952E\u5B57"></p><blockquote><p>\u7B14\u8BB0\u7248\u6743\u5F52\u539F\u4F5C\u8005\uFF08\u971C\u795E\uFF09\u6240\u6709\uFF0C\u51FA\u5904\uFF1Ahttps://books.halfrost.com/leetcode/</p></blockquote>',21),i=[s];function r(g,n){return t(),o("div",null,i)}var m=e(p,[["render",r],["__file","bat-shuati.html.vue"]]);export{m as default};
diff --git a/dist/assets/beijing.html.5436f34b.js b/dist/assets/beijing.html.5436f34b.js
deleted file mode 100644
index 7c79b8c8..00000000
--- a/dist/assets/beijing.html.5436f34b.js
+++ /dev/null
@@ -1 +0,0 @@
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diff --git a/dist/assets/beijing.html.78adaacf.js b/dist/assets/beijing.html.78adaacf.js
new file mode 100644
index 00000000..6bf00038
--- /dev/null
+++ b/dist/assets/beijing.html.78adaacf.js
@@ -0,0 +1 @@
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diff --git a/dist/assets/beijing.html.a011f671.js b/dist/assets/beijing.html.a011f671.js
new file mode 100644
index 00000000..705a8b77
--- /dev/null
+++ b/dist/assets/beijing.html.a011f671.js
@@ -0,0 +1 @@
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\u8BF4\u7684\u5DE5\u8D44\u53EA\u80FD\u53C2\u8003\uFF0C\u5DE5\u8D44\u8FD8\u662F\u4EE5\u5B9E\u9645\u53D1\u653E\u4E3A\u51C6\u3002\u5982\u679C\u60F3\u77E5\u9053\u5177\u4F53\u5DE5\u8D44\u4F60\u5F97\u79C1\u4E0B\u53BB\u95EE\u548C\u4F60\u5173\u7CFB\u597D\u7684\u5B66\u957F\u5B66\u59D0\uFF0C\u6216\u8005\u53EA\u80FD\u7B49\u5DE5\u8D44\u53D1\u4E0B\u6765\u4E86\u624D\u80FD\u77E5\u9053\u3002\u53E6\u5916\u94F6\u884C\u8F6F\u4EF6\u5F00\u53D1\u4E2D\u5FC3\u7684\u7A33\u5B9A\u4E5F\u53EA\u662F\u8BF4\u8F7B\u6613\u4E0D\u4F1A\u5F00\u9664\u4F60\uFF0C\u4F46\u662F\u5FD9\u4E0D\u5FD9\u5C31\u8981\u770B\u4F60\u8FD0\u6C14\u4E86\u3002\u94F6\u884C\u8F6F\u4EF6\u5F00\u53D1\u4E2D\u5FC3\u6709\u7684\u7EC4\u5FD9\u8D77\u6765\u5B8C\u5168\u4E0D\u865A PDD\u3002</p><h4 id="\u5DE5\u5546\u94F6\u884C\u8F6F\u4EF6\u5F00\u53D1\u4E2D\u5FC3" tabindex="-1"><a class="header-anchor" href="#\u5DE5\u5546\u94F6\u884C\u8F6F\u4EF6\u5F00\u53D1\u4E2D\u5FC3" aria-hidden="true">#</a> \u5DE5\u5546\u94F6\u884C\u8F6F\u4EF6\u5F00\u53D1\u4E2D\u5FC3</h4><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-b8653934-cc7f-4703-81f2-f654f7d4440a.png" alt=""></p><p>\u548C\u540C\u884C\u76F8\u6BD4\uFF0C\u5DE5\u5546\u94F6\u884C\u7684\u8F6F\u4EF6\u5F00\u53D1\u4E2D\u5FC3\u7B97\u6280\u672F\u6700\u597D\u7684\u4E86\u3002\u5DE5\u884C\u559C\u6B22\u62DB\u5E94\u5C4A\u751F\uFF0C\u793E\u62DB\u8FDB\u6765\u7684\u6BD4\u8F83\u5C11\u3002\u521A\u8FDB\u6765\u7684\u5E94\u5C4A\u751F\u804C\u7EA7\u662F\u52A9\u7406\u7ECF\u7406\uFF0C\u7A0E\u524D\u5E74\u85AA\u5DEE\u4E0D\u591A\u662F20\u4E07\u5DE6\u53F3\uFF08\u5230\u624B15-16\u4E07\u5427\uFF0C\u52A0\u4E0A\u5E74\u7EC8\u5956\u548C\u8282\u5047\u65E5\u8865\u8D34\uFF09\u3002\u5DE5\u8D44\u53D1\u653E\u65B9\u5F0F\u7A0D\u5FAE\u6709\u70B9\u5947\u602A\uFF0C\u5C31\u662F\u6BCF\u6708\u53D1\u516B\u4E5D\u5343\uFF0C\u7136\u540E\u7559\u4E00\u90E8\u5206\u5E74\u5E95\u4E00\u5E76\u53D1\u653E\u3002\u6BCF\u6708\u4F1A\u6709\u996D\u8865\uFF0C\u8FC7\u8282\u4E5F\u4F1A\u6709\u8282\u5047\u65E5\u8865\u8D34\uFF08\u653E\u4E09\u5929\u7684\u8282\u65E5\u5047\u671F\u7ED9 1000\uFF0C\u56FD\u5E86\u7ED9 2000\uFF0C\u8FC7\u5E74 4000\uFF09\u3002\u8FD9\u4E2A\u804C\u7EA7\u7684\u5DE5\u8D44\u5BF9\u4E8E\u5728\u5317\u4EAC\u5DE5\u4F5C\u6765\u8BF4\u8FD8\u662F\u6709\u70B9\u96BE\u9876\u7684\uFF0C\u6BD5\u7ADF\u5149\u8DDF\u4EBA\u5408\u79DF\u6BCF\u6708\u5C31\u8981\u753B\u6389\u4E24\u5343\u591A\u4E86\u3002\u5982\u679C\u4F60\u662F\u672C\u79D1\u6BD5\u4E1A\u8FDB\u5165\u5DE5\u884C\uFF0C\u4ECE\u52A9\u7406\u7ECF\u7406\u5347\u5230\u7ECF\u7406\u4E00\u9700\u8981\u4E24\u5E74\u65F6\u95F4\uFF0C\u7855\u58EB\u53EA\u9700\u8981\u4E00\u5E74\uFF0C\u8FD9\u4E2A\u804C\u7EA7\u57FA\u672C\u4E0A\u5168\u90FD\u80FD\u6309\u65F6\u8FBE\u5230\uFF0C\u4E0D\u8FC7\u5DE5\u8D44\u53D8\u5316\u4E0D\u592A\u5927\u3002\u4ECE\u7ECF\u7406\u4E00\u5347\u5230\u7ECF\u7406\u4E8C\u5927\u7EA6\u8981\u4E00\u5230\u4E24\u5E74\u7684\u65F6\u95F4\uFF0C\u8FD9\u5C31\u770B\u4F60\u80FD\u529B\u4E86\uFF0C\u7ECF\u7406\u4E8C\u4EE5\u540E\u5DE5\u8D44\u5C31\u76F8\u5BF9\u591A\u4E00\u4E9B\u4E86\uFF0C\u7ECF\u7406\u4E8C\u7EE9\u6548\u4E0D\u592A\u597D\u7684\u8BDD\u6BCF\u5E74\u5230\u624B\u80FD\u62FF 22 \u4E07\u5DE6\u53F3\uFF0C\u5982\u679C\u7EE9\u6548\u597D\uFF0C\u53EF\u80FD\u80FD\u62FF\u5230 29 \u4E07\u5DE6\u53F3\u3002\u7ECF\u7406\u4E8C\u5347\u7ECF\u7406\u4E09\u5C31\u5B8C\u5168\u770B\u4F60\u81EA\u5DF1\u80FD\u529B\u4E86\uFF0C\u5230\u7ECF\u7406\u4E09\u4EE5\u540E\u6BCF\u5E74\u5230\u624B\u90FD\u80FD 35 \u4E07\u5DE6\u53F3\uFF0C\u6536\u5165\u5C31\u5F88\u53EF\u89C2\u4E86\u3002\u53E6\u5916\u5728\u5DE5\u884C\u53D1\u4E13\u5229\u4EC0\u4E48\u7684\u4E5F\u6709\u4E9B\u5956\u91D1\uFF0C\u4E00\u4E2A\u4E13\u5229\u8C8C\u4F3C\u662F\u5956\u52B1 5000.</p><p>\u5DE5\u884C\u7684\u603B\u884C\u662F\u5728\u73E0\u6D77\u3002\u5DE5\u884C\u5728\u897F\u5B89\u3001\u676D\u5DDE\u7B49\u5730\u4E5F\u8BBE\u7ACB\u4E86\u7814\u53D1\u4E2D\u5FC3\uFF0C\u90FD\u662F\u5C5E\u4E8E\u603B\u884C\u3002\u76EE\u524D\u5317\u4EAC\u8FD9\u8FB9\u4E5F\u4E00\u76F4\u5728\u52A8\u5458\u5458\u5DE5\u53BB\u897F\u5B89\uFF0C\u85AA\u8D44\u548C\u5317\u4EAC\u5DEE\u4E0D\u592A\u591A\u3002\u542C\u8BF4\u897F\u5B89\u90A3\u8FB9\u7684\u5DE5\u884C\u52A0\u73ED\u6BD4\u8F83\u4E25\u91CD\u3002\u5317\u4EAC\u8FD9\u8FB9\u603B\u4F53\u8FD8\u597D\uFF0C\u5377\u4E0D\u5377\u770B\u4F60\u7EC4\u957F\u4E86\uFF0C\u4E0D\u8FC7\u4F60\u4E5F\u53EF\u4EE5\u4E0D\u7529\u4F60\u9886\u5BFC\uFF0C\u4ED6\u4EEC\u662F\u5F88\u96BE\u5F00\u6389\u4F60\u7684\uFF0C\u4ED6\u4EEC\u80FD\u7684\u53EA\u662F\u7EE9\u6548\u7ED9\u4F60\u6253\u4F4E\u70B9\uFF0C\u4F60\u5DE5\u8D44\u5C11\u70B9\u3002</p><h4 id="\u519C\u4E1A\u94F6\u884C\u8F6F\u4EF6\u5F00\u53D1\u4E2D\u5FC3" tabindex="-1"><a class="header-anchor" href="#\u519C\u4E1A\u94F6\u884C\u8F6F\u4EF6\u5F00\u53D1\u4E2D\u5FC3" aria-hidden="true">#</a> \u519C\u4E1A\u94F6\u884C\u8F6F\u4EF6\u5F00\u53D1\u4E2D\u5FC3</h4><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-fb046afd-1116-4619-a5ae-d9756863ca19.png" alt=""></p><p>\u611F\u89C9\u519C\u4E1A\u94F6\u884C\u7684\u8F6F\u4EF6\u5F00\u53D1\u4E2D\u5FC3\u6280\u672F\u6BD4\u5DE5\u884C\u5DEE\u4E00\u70B9\uFF0C\u4E0D\u8FC7\u5DE5\u8D44\u6BD4\u5DE5\u884C\u591A\u4E00\u4E9B\uFF0C\u521A\u6BD5\u4E1A\u7684\u5E94\u5C4A\u751F\u7A0E\u524D\u80FD\u5230\u7A0E\u524D25\u4E07-32\u4E07\uFF08\u8FD9\u662Fhr\u8BF4\u7684\u554A\uFF0C\u6211\u4E86\u89E3\u5230\u7684\u897F\u5B89\u6BCF\u6708\u7A0E\u540E\u5230\u624B\u662F 1\u4E072\uFF0C\u52A0\u4E0A\u5E74\u7EC8\u5956\u7A0E\u524D\u80FD\u7B97 20 \u4E07\u7684\u5E74\u5305\uFF0C\u5317\u4EAC\u6BD4\u897F\u5B89\u7A0D\u5FAE\u591A\u4E00\u70B9\u70B9\uFF0C\u4F46\u662F\u591A\u4E0D\u4E86\u592A\u591A\uFF09\u3002\u519C\u884C\u8F6F\u4EF6\u5F00\u53D1\u4E2D\u5FC3\u6709\u4E2A\u5927\u95EE\u9898\u5C31\u662F\u5DE5\u8D44\u5206\u914D\u5F88\u5E73\u5747\uFF0C\u4F46\u662F\u5DE5\u4F5C\u91CF\u5206\u5E03\u4E0D\u5747\uFF0C\u6709\u7684\u7EC4\u5341\u5206\u517B\u751F\uFF0C\u6709\u7684\u7EC4\u5FD9\u7684\u53D7\u4E0D\u4E86\uFF08\u8D8A\u63A5\u8FD1\u5BA2\u6237\u7528\u7684\u4EA7\u54C1\u7EBF\u8D8A\u7D2F\uFF09\u3002\u6211\u7684\u4E00\u4E2A\u5B66\u957F\u5929\u5929\u65E9\u65E9\u5C31\u4E0B\u73ED\u4E86\uFF0C\u53E6\u5916\u4E00\u4E2A\u540C\u5B66\u5468\u672B\u8DDF\u6211\u5403\u4E2A\u996D\u90FD\u6025\u5306\u5306\u7684\uFF0C\u4E3A\u4E86\u6295\u4EA7\u8981\u52A0\u73ED\u5230\u51CC\u6668\u3002\u76EE\u524D\u519C\u884C\u5185\u90E8\u7684\u6028\u6C14\u6BD4\u8F83\u5927\uFF0C\u8FD9\u70B9\u5927\u5BB6\u5728\u8109\u8109\u4E0A\u4E5F\u80FD\u770B\u51FA\u6765\u3002\u519C\u884C\u60F3\u8981\u5347\u804C\u8FD8\u8981\u53BB\u8003\u8F6F\u8003\u3002</p><h4 id="\u4E2D\u56FD\u94F6\u884C\u8F6F\u4EF6\u5F00\u53D1\u4E2D\u5FC3" tabindex="-1"><a class="header-anchor" href="#\u4E2D\u56FD\u94F6\u884C\u8F6F\u4EF6\u5F00\u53D1\u4E2D\u5FC3" aria-hidden="true">#</a> \u4E2D\u56FD\u94F6\u884C\u8F6F\u4EF6\u5F00\u53D1\u4E2D\u5FC3</h4><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-e3490a86-2b92-4a47-8c68-8e2281c2cb32.png" alt=""></p><p>\u4E2D\u56FD\u94F6\u884C\u8F6F\u4EF6\u5F00\u53D1\u4E2D\u5FC3\u7B97\u662F\u7ED9\u94B1\u6700\u5C11\u7684\u4E86\uFF0C\u5E74\u530515\u4E07\u5DE6\u53F3\u3002\u8FD9\u94B1\u5728\u5317\u4EAC\u786E\u5B9E\u592A\u5C11\u4E86\u3002\u4E0D\u8FC7\u5DE5\u4F5C\u662F\u76EE\u524D\u51E0\u4E2A\u94F6\u884C\u8F6F\u5F00\u91CC\u6700\u8F7B\u677E\u7684\uFF0C\u5BB6\u91CC\u4E0D\u600E\u4E48\u7F3A\u94B1\uFF0C\u53EA\u60F3\u627E\u4E2A\u8F7B\u677E\u7A33\u5B9A\u7684\u53EF\u4EE5\u9009\u3002</p><h4 id="\u90AE\u653F\u50A8\u84C4\u94F6\u884C\u8F6F\u4EF6\u7814\u53D1\u4E2D\u5FC3" tabindex="-1"><a class="header-anchor" href="#\u90AE\u653F\u50A8\u84C4\u94F6\u884C\u8F6F\u4EF6\u7814\u53D1\u4E2D\u5FC3" aria-hidden="true">#</a> \u90AE\u653F\u50A8\u84C4\u94F6\u884C\u8F6F\u4EF6\u7814\u53D1\u4E2D\u5FC3</h4><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-4e15e06c-f808-4d79-954f-3fbca94ce6e6.png" alt=""></p><p>\u7B2C\u4E00\u5E74\u5305\u542B\u8BD5\u7528\u671F\uFF0C\u5E74\u85AA\u7A0E\u524D\u603B\u5305 26w, \u7B2C\u4E8C\u5E74\u5E74\u85AA\u7A0E\u524D\u603B\u5305 31w\u3002\u52A0\u4E0D\u52A0\u73ED\u770B\u4F60\u8FD0\u6C14\u4E86\uFF0C\u8FD0\u6C14\u597D\u88AB\u5206\u5230\u597D\u7684\u7EC4\u4E0D\u600E\u4E48\u52A0\u73ED\uFF0C\u8FD0\u6C14\u4E0D\u597D\u5C31\u5F88\u60E8\u4E86\u3002\u5728\u5317\u4EAC\u5DE5\u4F5C\u7684\u8BDD\u4E0D\u4F1A\u88AB\u5916\u8C03\uFF0C\u4F46\u662F\u5728\u897F\u5B89\u7B49\u5730\u5DE5\u4F5C\u7684\u8BB8\u591A\u4EBA\u4F1A\u88AB\u5916\u8C03\u3002</p><h3 id="\u5238\u5546" tabindex="-1"><a class="header-anchor" href="#\u5238\u5546" aria-hidden="true">#</a> \u5238\u5546</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-58cd1949-b992-4550-b2e1-b24c519c0a78.png" alt=""></p><p>\u66FE\u7ECF\u519C\u884C\u8F6F\u5F00\u7684\u4E00\u4F4D\u9886\u5BFC\u6765\u6211\u4EEC\u5B66\u6821\u6821\u62DB\u5BA3\u8BB2\u65F6\u5C31\u8BF4\u56E0\u4E3A\u94F6\u884C\u7684\u5DE5\u8D44\u6709\u9650\u5236\uFF0C\u6DA8\u85AA\u6BD4\u8F83\u6162\u3002\u6240\u4EE5\u5F88\u591A\u94F6\u884C\u8F6F\u5F00\u7684\u804C\u5DE5\u5E72\u51E0\u5E74\u540E\u5C31\u4F1A\u8DD1\u5230\u5238\u5546\u53BB\u6323\u94B1\u3002\u90A3\u65F6\u6211\u624D\u77E5\u9053\u5238\u5546\u5C45\u7136\u8FD8\u62DB\u4E0D\u5C11\u7A0B\u5E8F\u5458\u3002\u540E\u6765\u6211\u53D1\u73B0\u4E2D\u4FE1\u5EFA\u6295\u8BC1\u5238\u662F\u771F\u4E0D\u9519\uFF0C\u5317\u4EAC\u8FD9\u8FB9\u6821\u62DB\u751F\u8FDB\u6765\u6708\u85AA 18k \uFF0C\u5E74\u7EC8\u5956 6 \u4E2A\u6708\uFF0C\u867D\u7136\u85AA\u8D44\u8FD8\u662F\u4E0D\u53CA\u4E92\u8054\u7F51\u516C\u53F8\uFF0C\u4F46\u662F\u6DA8\u85AA\u901F\u5EA6\u76F8\u6BD4\u4E8E\u5176\u5B83\u56FD\u4F01\u592E\u4F01\u8FD8\u662F\u5FEB\u5F88\u591A\u7684\u3002\u53E6\u5916\u53EA\u6709\u80A1\u7968\u5F00\u5E02\u7684\u65E5\u5B50\u7528\u4E0A\u73ED\uFF0C\u52A0\u73ED\u5F88\u5C11\u3002\u4E0D\u8FC7\u5BF9\u4E8E\u5B66\u5386\u7684\u8981\u6C42\u6BD4\u8F83\u9AD8\uFF0C\u5FC5\u987B\u662F985\u7855\u58EB\uFF0C\u5E76\u4E14\u8FD8\u5361\u672C\u79D1\u3002</p><p>\u5BF9\u4E8E\u5176\u5B83\u5238\u5546\u7684\u60C5\u51B5\u6211\u77E5\u9053\u7684\u5C31\u4E0D\u591A\u4E86\uFF0C\u8FD9\u91CC\u7ED9\u5927\u5BB6\u63D0\u4F9B\u4E00\u4E2A\u627E\u5DE5\u4F5C\u7684\u601D\u8DEF\uFF0C\u5927\u5BB6\u53EF\u4EE5\u591A\u53BB\u4E86\u89E3\u4E0B\u3002</p><h3 id="\u8FD0\u8425\u5546" tabindex="-1"><a class="header-anchor" href="#\u8FD0\u8425\u5546" aria-hidden="true">#</a> \u8FD0\u8425\u5546</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-1b67f498-dc2e-401f-b942-59455b941bd9.png" alt=""></p><p>\u8FD9\u91CC\u8BF4\u7684\u8FD0\u8425\u5546\u8BF4\u7684\u662F\u79FB\u52A8\u8054\u901A\u8FD8\u6709\u7535\u4FE1\u7684\u7814\u7A76\u9662\u3002\u79FB\u52A8\u7684\u5DE5\u8D44\u53D1\u653E\u98CE\u683C\u548C\u5DE5\u884C\u6709\u5F02\u66F2\u540C\u5DE5\u4E4B\u5999\uFF0C\u6BCF\u4E2A\u6708\u53D1\u7684\u5DE5\u8D44\u5F88\u5C11\uFF0C\u5230\u5E74\u7EC8\u4F1A\u4E00\u8D77\u518D\u53D1\u4E00\u4E9B\u3002\u5E94\u5C4A\u751F\u5E74\u85AA\u5927\u6982 20w \u5DE6\u53F3\uFF0C\u5E73\u65F6\u5DE5\u8D44\u53D1\u4E00\u534A\uFF0C\u5E74\u7EC8\u628A\u5269\u4E0B\u7684\u4E00\u534A\u53D1\u7ED9\u4F60\u3002\u8054\u901A\u5728\u5317\u4EAC\u7684\u7814\u7A76\u9662\u6709\u4E24\u4E2A\uFF0C\u4E00\u4E2A\u53EB\u8054\u901A\u7814\u7A76\u9662\uFF0C\u4E00\u4E2A\u53EB\u8054\u901A\u8F6F\u4EF6\u7814\u7A76\u9662\u3002\u6211\u542C\u8BF4\u7684\u662F\u8054\u901A\u7814\u7A76\u9662\u6BD4\u8F83\u597D\uFF0C\u8054\u901A\u8F6F\u4EF6\u7814\u7A76\u9662\u6BD4\u8F83\u5751\u3002 \u7535\u4FE1\u7814\u7A76\u9662\u7684\u636E\u8BF4\u5F88\u8F7B\u677E\uFF0C\u4F46\u662F\u5DE5\u8D44\u4F4E\uFF0C\u6CA1\u670B\u53CB\u5728\u8FD9\u91CC\uFF0C\u6211\u4E0D\u592A\u786E\u5B9A\uFF0C\u53EA\u662F\u542C\u8BF4\u3002</p><h2 id="\u7814\u7A76\u6240" tabindex="-1"><a class="header-anchor" href="#\u7814\u7A76\u6240" aria-hidden="true">#</a> \u7814\u7A76\u6240</h2><p>\u5317\u4EAC\u6709\u7740\u6570\u91CF\u5E9E\u5927\u7684\u7814\u7A76\u6240\uFF0C\u6BD4\u5982\u822A\u5929\u79D1\u6280\u7CFB\u5217\u3001\u822A\u7A7A\u5DE5\u4E1A\u7CFB\u5217\u3001\u4E2D\u8239\u8236\u7CFB\u5217\u3001\u4E2D\u79D1\u9662\u7CFB\u5217\u3001\u4E2D\u7535\u79D1\u7CFB\u5217\u3001\u519B\u4E8B\u79D1\u5B66\u9662\u4E0B\u5C5E\u7CFB\u5217\u3001\u5DE5\u4FE1\u90E8\u4E0B\u5C5E\u7814\u7A76\u9662\u3001\u4E2D\u56FD\u5175\u5668\u7B49\u7B49\u3002\u4E0D\u5F97\u4E0D\u8BF4\u8BA1\u7B97\u673A\u76F8\u5173\u4E13\u4E1A\u771F\u7684\u662F\u4E07\u91D1\u6CB9\uFF0C\u56E0\u4E3A\u4E0A\u8FF0\u7814\u7A76\u6240\uFF0C\u4E0D\u7BA1\u4ED6\u4EEC\u4E3B\u8425\u4E1A\u52A1\u662F\u5565\uFF0C\u4ED6\u4EEC\u5168\u90FD\u62DB\u8BA1\u7B97\u673A\u76F8\u5173\u4E13\u4E1A\u7684\u6BD5\u4E1A\u751F\uFF0C\u5E76\u4E14\u62DB\u7684\u8FD8\u4E0D\u5C11\u3002</p><p>\u8FD1\u51E0\u5E74\u60F3\u6210\u4E3A\u8FD9\u4E9B\u7814\u7A76\u6240\u7684\u6B63\u5F0F\u804C\u5DE5\u90FD\u9700\u8981\u662F\u7855\u58EB\u4EE5\u4E0A\u4E86\uFF0C\u7B7E\u7684\u672C\u79D1\u751F\u57FA\u672C\u90FD\u662F\u52B3\u52A1\u6D3E\u9063\u3002\u6237\u53E3\u7684\u4E8B\u653E\u5728\u751F\u6D3B\u91CC\u7EDF\u4E00\u8BF4\u3002</p><p>\u53EF\u80FD\u5BB6\u91CC\u7684\u957F\u8F88\u542C\u5230\u4F60\u53BB\u4E86\u7814\u7A76\u6240\u4F1A\u89C9\u5F97\u5F88\u6709\u9762\u5B50\u3002\u4F46\u662F\u5355\u8BBA\u8F6F\u4EF6\u6280\u672F\u6765\u8BF4\uFF0C\u76EE\u524D\u7814\u7A76\u6240\u662F\u843D\u540E\u4E8E\u4E92\u8054\u7F51\u516C\u53F8\u7684\uFF0C\u5E76\u4E14\u5DEE\u8DDD\u8FD8\u4E0D\u7B97\u5C0F\u3002\u7814\u7A76\u6240\u548C\u4E92\u8054\u7F51\u516C\u53F8\u7684\u529E\u4E8B\u98CE\u683C\u4E0D\u592A\u4E00\u6837\uFF0C\u4E92\u8054\u7F51\u516C\u53F8\u4F1A\u628A\u5C97\u4F4D\u5212\u5206\u7684\u5F88\u7EC6\u81F4\u751A\u81F3\u6709\u7684\u4E92\u8054\u7F51\u516C\u53F8\u4F1A\u65E0\u9650\u7684\u7EC6\u5206\u4E00\u4E2A\u5C97\u4F4D\uFF08\u8FD9\u70B9\u662F\u6211\u89C9\u5F97\u4E0D\u592A\u597D\u7684\u5730\u65B9\uFF0C\u56E0\u4E3A\u5212\u5206\u7684\u592A\u7EC6\u4E86\uFF0C\u4EE5\u540E\u8DF3\u69FD\u4F1A\u5B58\u5728\u95EE\u9898\uFF09\uFF0C\u4F46\u662F\u7814\u7A76\u6240\u7684\u5C97\u4F4D\u53C8\u5212\u5206\u7684\u592A\u7C97\u7CD9\u4E86\uFF08\u4ECE\u8BA2\u9700\u6C42\u3001\u5199\u5F00\u53D1\u6587\u6863\u3001\u4EE3\u7801\u5F00\u53D1\u3001\u6D4B\u8BD5\u3001\u5230\u548C\u5BA2\u6237\u626F\u76AE\u8FD9\u4E9B\u6D41\u7A0B\u5168\u7684\u4F60\u6765\u641E\uFF09\u3002\u53E6\u5916\u56E0\u4E3A\u7814\u7A76\u6240\u7684\u5927\u90E8\u5206\u9886\u5BFC\u8F6F\u4EF6\u65B9\u9762\u6280\u672F\u6CA1\u6709\u4E92\u8054\u7F51\u90A3\u4E48\u4E13\uFF0C\u6240\u4EE5\u5BF9\u5DE5\u4F5C\u91CF\u7684\u8BC4\u4F30\u4E0D\u662F\u592A\u51C6\uFF0C\u6709\u65F6\u5019\u5B89\u6392\u8D77\u6D3B\u6765\u5C31\u6BD4\u8F83\u79BB\u8C31\u3002\u662F\u5426\u6765\u7814\u7A76\u6240\u8981\u60F3\u60F3\u660E\u767D\u4EE5\u4E0B\u51E0\u4E2A\u95EE\u9898\uFF1A\uFF081\uFF09\u4F60\u5BB6\u5EAD\u7684\u7ECF\u6D4E\u60C5\u51B5\uFF0C\u81F3\u5C11\u5317\u4EAC\u4E70\u623F\u9996\u4ED8\u5BB6\u91CC\u80FD\u638F\u51FA\u6765\u3002\uFF082\uFF09\u4F60\u7684\u5174\u8DA3\uFF08\u5982\u679C\u53EA\u60F3\u5B89\u5B89\u9759\u9759\u7684\u5199\u4EE3\u7801\uFF0C\u7814\u7A76\u6240\u4E0D\u592A\u5408\u9002\uFF09\u3002\uFF083\uFF09\u9762\u8BD5\u901A\u8FC7\u540E\u4F60\u8981\u5145\u5206\u7684\u4E86\u89E3\u4F60\u6240\u5728\u7684\u56E2\u961F\u60C5\u51B5\uFF0C\u540C\u4E00\u4E2A\u7814\u7A76\u6240\uFF0C\u4E0D\u540C\u7684\u56E2\u961F\u7684\u5DEE\u522B\u90A3\u53EF\u5927\u4E86\u53BB\u4E86\u3002</p><p>\u603B\u4F53\u6765\u8BF4\uFF0C\u4E2A\u4EBA\u611F\u89C9\u5982\u679C\u4F60\u5728\u4E00\u4E2A\u4E8C\u7EBF\u57CE\u5E02\u7684\u7814\u7A76\u6240\u5DE5\u4F5C\u4F1A\u6BD4\u5728\u4E00\u7EBF\u57CE\u5E02\u7814\u7A76\u6240\u5DE5\u4F5C\u8212\u670D\u3002\u5728\u4E00\u7EBF\u57CE\u5E02\u53BB\u4E92\u8054\u7F51\u516C\u53F8\u5E72\u51E0\u5E74\u6512\u70B9\u94B1\u64A4\u4E00\u4E2A\u4E8C\u7EBF\u57CE\u5E02\u538B\u529B\u6CA1\u90A3\u4E48\u5927\u3002\u5728\u5317\u4EAC\u7684\u7814\u7A76\u6240\u5DE5\u4F5C\u5317\u4EAC\u6237\u53E3\u662F\u62FF\u4E86\uFF0C\u4F46\u662F\u5E72\u51E0\u5E74\u6839\u672C\u6512\u4E0D\u4E0B\u591A\u5C11\u94B1\uFF0C\u4E00\u7EBF\u57CE\u5E02\u7814\u7A76\u6240\u5206\u623F\u8FD9\u4E8B\u5C31\u4E0D\u7528\u505A\u68A6\u4E86\uFF0C\u5145\u5176\u91CF\u4F1A\u7ED9\u4F60\u63D0\u4F9B\u4E00\u4E2A\u5BBF\u820D\uFF0C\u8FD9\u79CD\u5BBF\u820D\u4E5F\u5C31\u662F\u6BD5\u4E1A\u4E09\u5230\u4E94\u5E74\u5185\u53EF\u4EE5\u4F4F\uFF0C\u4EE5\u540E\u5C31\u4E0D\u80FD\u4F4F\u4E86\u3002\u76F8\u6BD4\u4E8E\u4E8C\u7EBF\u57CE\u5E02\u7684\u7814\u7A76\u6240\uFF0C\u4E00\u7EBF\u57CE\u5E02\u7814\u7A76\u6240\u7684\u5DE5\u8D44\u6BCF\u6708\u591A\u4E2A\u4E24\u4E09\u5343\uFF0C\u4F46\u662F\u623F\u4EF7\u662F\u4E8C\u7EBF\u57CE\u5E02\u7684\u4E09\u5230\u4E94\u500D\uFF0C\u751F\u6D3B\u5E78\u798F\u611F\u4F1A\u5927\u6253\u6298\u6263\u3002</p><h3 id="\u822A\u5929\u79D1\u6280-\u822A\u7A7A\u5DE5\u4E1A" tabindex="-1"><a class="header-anchor" href="#\u822A\u5929\u79D1\u6280-\u822A\u7A7A\u5DE5\u4E1A" aria-hidden="true">#</a> \u822A\u5929\u79D1\u6280&amp;\u822A\u7A7A\u5DE5\u4E1A</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-fcff3f6d-6357-48fe-a807-74c225ce0c95.png" alt=""></p><p>\u6211\u6709\u5F88\u591A\u7684\u6821\u53CB\u90FD\u5728\u822A\u7A7A\u822A\u5929\u7CFB\u5217\u7684\u7814\u7A76\u6240\u3002\u7814\u7A76\u6240\u7684\u5177\u4F53\u85AA\u8D44\u90FD\u6BD4\u8F83\u4FDD\u5BC6\uFF0C\u5927\u90E8\u5206\u7814\u7A76\u6240\u5728\u7ED9\u4F60 offer \u7684\u65F6\u5019\u4E0D\u4F1A\u50CF\u4E92\u8054\u7F51\u516C\u53F8\u90A3\u6837\u628A\u85AA\u8D44\u7ED9\u4F60\u8BF4\u7684\u6E05\u6E05\u695A\u695A\u5E76\u4E14\u5199\u5728\u5408\u540C\u4E0A\uFF0C\u800C\u662F\u5927\u6982\u548C\u4F60\u8BF4\u4E2A\u6570\u3002\u800C\u4E14\u4F60\u5165\u804C\u540E\u4E24\u5230\u4E09\u4E2A\u6708\u7684\u85AA\u8D44\u5F80\u5F80\u90FD\u5F88\u5C11\uFF0C\u7B49\u4E09\u56DB\u4E2A\u6708\u4EE5\u540E\u85AA\u8D44\u7A33\u5B9A\u4E86\u4F60\u624D\u80FD\u786E\u5B9A\u4F60\u5F00\u591A\u5C11\u94B1\u3002</p><p>\u822A\u7A7A\u822A\u5929\u76EE\u524D\u6548\u76CA\u6BD4\u8F83\u597D\uFF0C\u7B97\u662F\u7814\u7A76\u6240\u4E2D\u85AA\u8D44\u6BD4\u8F83\u9AD8\u7684\u3002\u53E6\u5916\u98DF\u5802\u548C\u5BBF\u820D\u90FD\u6709\uFF0C\u5982\u679C\u6CA1\u5BBF\u820D\u8FD8\u4F1A\u6709\u79DF\u623F\u8865\u8D34\u3002\u4F46\u662F\u6323\u94B1\u548C\u4E92\u8054\u7F51\u516C\u53F8\u80AF\u5B9A\u6CA1\u6CD5\u6BD4\u3002\u85AA\u8D44\u7684\u8BDD\u521A\u6BD5\u4E1A\u7684\u5B66\u751F\u6BCF\u6708\u5230\u624B\u5927\u6982\u662F\u4E00\u4E07\u51FA\u5934\uFF0C\u5DE5\u8D44\u52A0\u4E0A\u5404\u79CD\u8865\u8D34\u5E74\u85AA\u5DEE\u4E0D\u591A\u7A0E\u524D\u80FD\u523020\u591A\u4E07\u3002\u52A0\u73ED\u6CA1\u6709\u52A0\u73ED\u8D39\uFF0C\u51FA\u5DEE\u4F1A\u6709\u51FA\u5DEE\u8865\u8D34\uFF0C\u6709\u7684\u56E2\u961F\u51FA\u5DEE\u4E00\u5929\u8865300\uFF0C\u6709\u7684\u56E2\u961F\u51FA\u5DEE\u4E00\u5929\u8865400\u3002\u6240\u4EE5\u5982\u679C\u4F60\u4E00\u4E2A\u6708\u90FD\u9A7B\u5728\u5916\u9762\u7684\u8BDD\uFF0C\u4E00\u4E2A\u6708\u5DE5\u8D44\u5230\u624B\u4E5F\u4E24\u4E07\u591A\u5462\u3002\u4F46\u662F\u4E00\u5E74\u6709\u4E2A\u4E00\u4E24\u6708\u51FA\u5DEE\u8FD8\u884C\uFF0C\u6709\u7684\u9879\u76EE\u7EC4\u4E00\u5E74\u6709\u4E09\u5206\u4E4B\u4E8C\u65F6\u95F4\u5728\u5916\u9762\u51FA\u5DEE\uFF0C\u4F60\u4F1A\u6000\u7591\u4EBA\u751F\u7684\u3002\u5176\u5B9E\u521A\u6BD5\u4E1A\u5934\u4E24\u5E74\u822A\u7A7A\u822A\u5929\u7684\u85AA\u8D44\u548C\u4E92\u8054\u7F51\u516C\u53F8\u5DEE\u8DDD\u4E0D\u5927\uFF0C\u4E0D\u8FC7\u5728\u4E24\u4E09\u5E74\u540E\u85AA\u8D44\u6C34\u5E73\u5C31\u4F1A\u9010\u6E10\u62C9\u5F00\uFF0C\u7814\u7A76\u6240\u85AA\u8D44\u6DA8\u7684\u90FD\u6162\u3002</p><p>\u53E6\u5916\u822A\u7A7A\u822A\u5929\u7684\u7814\u7A76\u6240\u662F\u5F88\u5FD9\u7684\uFF0C\u6240\u4EE5\u522B\u60F3\u7740\u8FDB\u6765\u8F7B\u677E\u3002\u7814\u7A76\u6240\u7684\u5FD9\u6CD5\u548C\u4E92\u8054\u7F51\u516C\u53F8\u4E0D\u662F\u4E00\u79CD\u5FD9\u6CD5\uFF0C\u6709\u7684\u4EBA\u5728\u5DE5\u4F5C\u5F3A\u5EA6\u5927\u7684\u4E92\u8054\u7F51\u516C\u53F8\u5F85\u8FC7\u7684\u53EF\u80FD\u89C9\u5F97\u81EA\u5DF1 996 \u548C 007 \u90FD\u80FD\u6297\uFF0C\u6765\u4E2A\u7814\u7A76\u6240\u8FD8\u6015\u5565\uFF1F\u6211\u662F\u60F3\u8BF4\u4F60\u53EF\u80FD\u60F3\u7684\u6709\u70B9\u7B80\u5355\u4E86\uFF0C\u5728\u7814\u7A76\u6240\u5199\u4EE3\u7801\u53EA\u662F\u5DE5\u4F5C\u7684\u4E00\u5C0F\u90E8\u5206\uFF0C\u8BA9\u4F60\u70E6\u5FC3\u7684\u4E8B\u591A\u7740\u5462\u3002\u53EA\u662F\u8BF4\u4F60\u5982\u679C\u4E0D\u628A\u9886\u5BFC\u6253\u4E86\u7684\u8BDD\uFF0C\u4ED6\u4E0D\u592A\u5BB9\u6613\u628A\u4F60\u5F00\u6389\u3002\u53E6\u5916\u7814\u7A76\u6240\u6709\u4E2A\u597D\u5904\u662F\u6BD4\u8F83\u652F\u6301\u5728\u804C\u8BFB\u535A\uFF0C\u5982\u679C\u4F60\u7684\u7EC4\u4E0D\u662F\u592A\u5FD9\uFF0C\u63D0\u5347\u4E0B\u5B66\u5386\u662F\u4E2A\u4E0D\u9519\u7684\u9009\u62E9\u3002</p><h3 id="\u5DE5\u4FE1\u90E8\u4E0B\u5C5E\u7814\u7A76\u9662" tabindex="-1"><a class="header-anchor" href="#\u5DE5\u4FE1\u90E8\u4E0B\u5C5E\u7814\u7A76\u9662" aria-hidden="true">#</a> \u5DE5\u4FE1\u90E8\u4E0B\u5C5E\u7814\u7A76\u9662</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-0f3b7783-4567-4f07-974d-a31b8d9ec939.png" alt=""></p><p>\u5DE5\u4FE1\u90E8\u4E0B\u5C5E\u7684\u7814\u7A76\u9662\u6574\u4F53\u4E0A\u90FD\u4E0D\u9519\uFF0C\u5C31\u6BD4\u5982\u4FE1\u901A\u9662\uFF08\u4E2D\u56FD\u4FE1\u606F\u901A\u4FE1\u7814\u7A76\u9662\uFF09\uFF0C\u5982\u679C\u4F60\u5BF9\u8FD9\u4E2A\u5355\u4F4D\u964C\u751F\u7684\u8BDD\u4F60\u53EF\u4EE5\u770B\u770B\u4F60\u7684\u884C\u7A0B\u7801\u4E0B\u9762\u670D\u52A1\u63D0\u4F9B\u5546\u6392\u5728\u7B2C\u4E00\u4E2A\u7684\u662F\u8C01\u3002\u4FE1\u901A\u9662\u662F\u5236\u5B9A\u6807\u51C6\u7684\u5355\u4F4D\uFF0C\u4E5F\u662F\u76D1\u7406\u5355\u4F4D\u3002\u5728\u4FE1\u901A\u9662\u7684\u8BDD\u4EE3\u7801\u5C31\u5F88\u5C11\u5199\u4E86\uFF0C\u66F4\u591A\u5C31\u662F\u5199\u6587\u6863\u4E86\uFF0C\u4E0D\u8FC7\u4FE1\u901A\u9662\u8FD9\u79CD\u5730\u65B9\u7684\u89C6\u91CE\u80AF\u5B9A\u9AD8\u4E00\u4E9B\u3002\u85AA\u8D44\u7684\u8BDD\u4FE1\u901A\u9662\u6BCF\u4E2A\u804C\u5DE5\u85AA\u8D44\u5DEE\u522B\u5F88\u5927\uFF0C\u521A\u8FDB\u53BB\u5DE5\u8D44\u5F88\u4F4E\uFF0C\u53EF\u80FD\u5C31\u56DB\u4E94\u5343\u5757\u94B1\uFF0C\u4F46\u662F\u85AA\u8D44\u6BCF\u4E2A\u6708\u90FD\u4F1A\u53D8\u5316\uFF0C\u7136\u540E\u7A33\u5B9A\u5728\u4E00\u4E2A\u6570\u3002\u85AA\u8D44\u4F4E\u7684\u6BCF\u6708\u5230\u624B\u6709\u4E00\u4E07\u51FA\u5934\uFF0C\u4F46\u6211\u77E5\u9053\u6BCF\u6708\u5230\u624B\u4E24\u4E09\u4E07\u751A\u81F3\u66F4\u591A\u7684\u4E5F\u662F\u6709\u7684\uFF08\u4E0D\u662F\u9886\u5BFC\u554A\uFF0C\u53EA\u662F\u804C\u5DE5\uFF09\u3002</p><h3 id="\u4E2D\u79D1\u9662\u7CFB\u5217" tabindex="-1"><a class="header-anchor" href="#\u4E2D\u79D1\u9662\u7CFB\u5217" aria-hidden="true">#</a> \u4E2D\u79D1\u9662\u7CFB\u5217</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-96c5f7a6-b13b-4153-9c7f-7c4617dbddca.png" alt=""></p><p>\u4E2D\u79D1\u9662\u7CFB\u5217\u4E0B\u8BA1\u7B97\u673A\u76F8\u5173\u6700\u5F3A\u7684\u4E09\u4E2A\u6240\u5C31\u662F\u81EA\u52A8\u5316\u6240\uFF08\u641E nlp \u7684\u5E94\u8BE5\u90FD\u542C\u8FC7\u5B97\u6210\u5E86\u8001\u5E08\uFF09\u3001\u8F6F\u4EF6\u6240\u3001\u8BA1\u7B97\u6240\u3002\u53E6\u5916\u8FD8\u6709\u4FE1\u5DE5\u6240\u3001\u7535\u5B50\u6240\u4E5F\u8FD8\u51D1\u5408\u3002\u6574\u4F53\u5F85\u9047\u4E0A\uFF0C\u4E2D\u79D1\u9662\u7CFB\u5217\u7684\u5F85\u9047\u4E0D\u5982\u822A\u7A7A\u822A\u5929\u7CFB\u5217\u7684\u3002\u4F60\u53EF\u4EE5\u628A\u4E2D\u79D1\u9662\u7CFB\u5217\u7684\u7814\u7A76\u6240\u5B8C\u5168\u7684\u60F3\u8C61\u6210\u4E00\u4E2A\u5927\u5B66\uFF08\u55EF\uFF0C\u4E0D\u7528\u60F3\u8C61\uFF0C\u786E\u5B9E\u662F\u4E2A\u5927\u5B66\uFF0C\u4E2D\u56FD\u79D1\u5B66\u9662\u5927\u5B66\u561B\uFF09\u3002\u6BCF\u4E2A\u56E2\u961F\u5C31\u662F\u4F60\u4EEC\u7814\u7A76\u751F\u7684\u5B9E\u9A8C\u5BA4\u3002\u57FA\u672C\u4E0A\u5C31\u662F\u4E00\u4E2A\u5927\u8001\u677F\uFF0C\u5E26\u51E0\u4E2A\u5C0F\u8001\u677F\uFF0C\u518D\u5E26\u51E0\u4E2A\u804C\u5DE5\uFF0C\u53E6\u5916\u518D\u914D\u51E0\u4E2A\u4E2D\u79D1\u9662\u7684\u5B66\u751F\u3002\u8BFE\u9898\u7EC4\u60F3\u8981\u6323\u94B1\u4E5F\u662F\u9700\u8981\u5927\u8001\u677F\u51FA\u53BB\u62C9\u6D3B\uFF0C\u7136\u540E\u5C0F\u8001\u677F\u5E26\u7740\u5B66\u751F\u53BB\u5E72\u6D3B\u3002\u5DE5\u4F5C\u65B9\u5F0F\u548C\u6280\u672F\u6C34\u5E73\u548C\u4F60\u4EEC\u7814\u7A76\u751F\u7684\u5B9E\u9A8C\u5BA4\u4E00\u6A21\u4E00\u6837\u7684\uFF0C\u5C31\u662F\u591A\u4E86\u4E00\u4E9B\u7855\u58EB\u535A\u58EB\u804C\u5DE5\u7F62\u4E86\u3002</p><p>\u4E2D\u79D1\u9662\u7CFB\u5217\u5404\u4E2A\u6240\u548C\u5404\u4E2A\u8BFE\u9898\u7EC4\u7684\u5F85\u9047\u4EE5\u53CA\u5DE5\u4F5C\u65B9\u5F0F\u5DEE\u8DDD\u7279\u522B\u5927\uFF0C\u5DE5\u8D44\u6709\u5C11\u91CF\u7684\u6BD4\u8F83\u9AD8\u7684\uFF08\u6211\u8BF4\u7684\u6BD4\u8F83\u9AD8\u662F\u80FD\u548C\u4E92\u8054\u7F51\u516C\u53F8\u6301\u5E73\uFF09\uFF0C\u5927\u90E8\u5206\u521A\u8FDB\u6765\u7684\u7855\u58EB\u5E94\u5C4A\u751F\u5DE5\u8D44\u5DEE\u4E0D\u591A\u5C31\u662F\u516B\u4E5D\u5343\uFF0C\u535A\u58EB\u4E00\u4E07\u591A\u70B9\u3002\u6709\u7684\u6240\u63D0\u4F9B\u5BBF\u820D\uFF0C\u6709\u7684\u6240\u8FDE\u5BBF\u820D\u90FD\u6CA1\u3002\u603B\u4F53\u4E0A\u6765\u8BF4\u60F3\u5728\u4E2D\u79D1\u9662\u6709\u597D\u7684\u53D1\u5C55\uFF0C\u9700\u8981\u4F60\u662F\u535A\u58EB\uFF0C\u7136\u540E\u591A\u53D1\u8BBA\u6587\u3002\u7B49\u4F60\u6210\u4E3A\u5C0F\u8001\u677F\u540E\uFF0C\u4E14\u56E2\u961F\u53EF\u4EE5\u9879\u76EE\u6210\u679C\u8F6C\u5316\uFF0C\u6216\u8005\u5B75\u5316\u4F01\u4E1A\u540E\u4F60\u7684\u5F85\u9047\u4F1A\u6709\u6BD4\u8F83\u5927\u7684\u53D8\u5316\u3002</p><h3 id="\u4E2D\u7535\u79D1\u7CFB\u5217" tabindex="-1"><a class="header-anchor" href="#\u4E2D\u7535\u79D1\u7CFB\u5217" aria-hidden="true">#</a> \u4E2D\u7535\u79D1\u7CFB\u5217</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-a4804493-fdb0-48ea-b9f5-82ad9a3d3d08.png" alt=""></p><p>\u4E2D\u7535\u79D1\u7CFB\u5217\u7684\u5F85\u9047\u6BD4\u822A\u7A7A\u822A\u5929\u7CFB\u5217\u7A0D\u5DEE\uFF0C\u6BD4\u4E2D\u79D1\u9662\u7CFB\u5217\u7A0D\u5F3A\u4E00\u4E9B\u3002\u6211\u611F\u89C9\u4E2D\u7535\u79D1\u7CFB\u5217\u7684\u52A0\u73ED\u5F3A\u5EA6\u6BD4\u8F83\u9AD8\uFF0C\u8BA4\u8BC6\u7684\u51E0\u4E2A\u5728\u4E2D\u7535\u79D1\u7CFB\u5217\u7684\u7ECF\u5E38 996 \u751A\u81F3 007\uFF0C\u8FD8\u7ECF\u5E38\u51FA\u5DEE\u3002\u5F85\u9047\u7684\u8BDD\u57FA\u672C\u5DE5\u8D44\u4E5F\u662F\u6BCF\u67081\u4E07\u51FA\u5934\uFF0C\u7136\u540E\u51FA\u5DEE\u4E5F\u662F\u6709\u51FA\u5DEE\u8865\u8D34\uFF0C\u6BCF\u5929300 \u6216\u8005400\uFF0C\u5177\u4F53\u8981\u770B\u56E2\u961F\u3002\u611F\u89C9\u5DE5\u8D44\u4E3B\u8981\u662F\u9760\u51FA\u5DEE\u8865\u8D34\u5806\u8D77\u6765\u7684\u3002\u5927\u90E8\u5206\u4E0B\u5C5E\u9662\u6240\u4F1A\u63D0\u4F9B\u804C\u5DE5\u5BBF\u820D\uFF0C\u4E2D\u7535\u79D1\u7CFB\u5217\u4E0B\u5C5E\u7814\u7A76\u6240\u98CE\u683C\u5DEE\u522B\u5F88\u5927\uFF0C\u597D\u8D77\u6765\u662F\u771F\u597D\uFF0C\u5751\u8D77\u6765\u662F\u771F\u5751\u554A\u3002</p><h3 id="\u4E2D\u56FD\u5175\u5668\u7CFB\u5217" tabindex="-1"><a class="header-anchor" href="#\u4E2D\u56FD\u5175\u5668\u7CFB\u5217" aria-hidden="true">#</a> \u4E2D\u56FD\u5175\u5668\u7CFB\u5217</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-db583262-a5d4-4137-88e1-90f0127ba755.png" alt=""></p><p>\u4E2D\u56FD\u5175\u5668\u7CFB\u5217\u8BA1\u7B97\u673A\u76F8\u5173\u4E13\u4E1A\u62DB\u7684\u4E0D\u662F\u592A\u591A\uFF0C\u5176\u5B9E\u6BCF\u5E74\u4E00\u5171\u62DB\u7684\u4EBA\u4E5F\u4E0D\u591A\u3002\u6211\u6700\u521D\u5BF9\u4E2D\u56FD\u5175\u5668\u7CFB\u5217\u7684\u7814\u7A76\u6240\u6709\u4E86\u89E3\u662F\u4E00\u4E2A\u6240\u6765\u6211\u4EEC\u5B66\u6821\u5BA3\u8BB2\u3002\u611F\u89C9\u4E2D\u56FD\u5175\u5668\u5728\u897F\u5B89\u7684\u51E0\u4E2A\u6240\u80FD\u7B97\u7684\u4E0A\u662F\u897F\u5B89\u7814\u7A76\u6240\u7684\u5929\u82B1\u677F\u4E86\u5427\uFF0C\u5F85\u9047\u8FD8\u4E0D\u9519\uFF08\u548C\u822A\u5929504\u6240\u6BD4\u6211\u6709\u70B9\u4E0D\u592A\u786E\u5B9A\uFF09\u4F46\u662F\u5728\u5317\u4EAC\u6211\u5C31\u4E0D\u592A\u6E05\u695A\u4E86\u3002</p><h3 id="\u519B\u4E8B\u79D1\u5B66\u9662\u7CFB\u5217" tabindex="-1"><a class="header-anchor" href="#\u519B\u4E8B\u79D1\u5B66\u9662\u7CFB\u5217" aria-hidden="true">#</a> \u519B\u4E8B\u79D1\u5B66\u9662\u7CFB\u5217</h3><p>\u519B\u4E8B\u79D1\u5B66\u9662\u7CFB\u5217\u7684\u7814\u7A76\u6240\u62DB\u7684\u804C\u4F4D\u90FD\u662F\u519B\u961F\u6587\u804C\uFF0C\u4E5F\u5C31\u662F\u8BF4\u90FD\u9700\u8981\u8003\u8BD5\u7684\u3002\u6211\u4E0A\u65F6\uFF0C\u542C\u8FC7\u51E0\u5BB6\u519B\u4E8B\u79D1\u5B66\u9662\u4E0B\u5C5E\u5355\u4F4D\u6765\u5BA3\u8BB2\uFF0C\u53EA\u662F\u6709\u4E2A\u7C97\u7565\u7684\u4E86\u89E3\u3002\u519B\u961F\u6587\u804C\u4E5F\u662F\u4E0A\u73ED\u5236\u7684\uFF0C\u4E0A\u73ED\u65F6\u4E5F\u662F\u9700\u8981\u7A7F\u519B\u88C5\u7684\uFF0C\u4E0B\u73ED\u540E\u7684\u751F\u6D3B\u4E0D\u5E72\u9884\u3002\u5DE5\u8D44\u6709\u4E2A\u5F88\u8BE6\u7EC6\u7684\u804C\u79F0\u5BF9\u5E94\u8868\uFF0C\u7855\u58EB\u8FDB\u53BB\u6211\u8BB0\u5F97\u662F\u4E00\u4E07\u51FA\u5934\u3002\u60F3\u6709\u597D\u7684\u53D1\u5C55\u6700\u597D\u53BB\u6293\u603B\u5355\u4F4D\uFF0C\u56E0\u4E3A\u4E0A\u9762\u63D0\u7684\u5F88\u591A\u7814\u7A76\u6240\u60F3\u8981\u9879\u76EE\u90FD\u5F97\u6293\u603B\u5355\u4F4D\u6279\u3002\u4E0D\u8FC7\u6293\u603B\u5355\u4F4D\u7684\u79D1\u7814\u5C97\u90FD\u8981\u535A\u58EB\u4E86\uFF0C\u7855\u58EB\u8FDB\u53BB\u53EA\u80FD\u662F\u652F\u6491\u5C97\u4F4D\u3002</p><p>\u5317\u4EAC\u6765\u6211\u4EEC\u5B66\u6821\u5BA3\u8BB2\u7684\u51E0\u5BB6\u519B\u79D1\u9662\u4E0B\u5C5E\u7814\u7A76\u6240\u90FD\u662F\u627F\u8BFA\u6237\u53E3\u4EE5\u53CA\u5305\u89E3\u51B3\u5B50\u5973\u4E0A\u5B66\u95EE\u9898\u7684\u3002\u5F53\u65F6\u8BF4\u7684\u662F\u535A\u58EB\u8FDB\u53BB\u526F\u8425\u7EA7\uFF0C\u4F1A\u63D0\u4F9B\u4E00\u4E2A\u56DB\u5341\u5E73\u5DE6\u53F3\u7684\u623F\u5B50\u4F4F\u3002\u7855\u58EB\u5C31\u662F\u666E\u901A\u4E24\u4EBA\u4E00\u95F4\u7684\u5BBF\u820D\u3002</p><h2 id="\u751F\u6D3B\u65B9\u9762" tabindex="-1"><a class="header-anchor" href="#\u751F\u6D3B\u65B9\u9762" aria-hidden="true">#</a> \u751F\u6D3B\u65B9\u9762</h2><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-799a0d1a-7782-4e3c-8a36-4c495cd94ae5.png" alt=""></p><p>\u5317\u4EAC\u5177\u4F53\u7684\u623F\u4EF7\u3001\u7F8E\u98DF\u6559\u80B2\u7B49\u60C5\u51B5\u6211\u653E\u5230\u4E0B\u4E00\u7BC7\u8BB2\u5317\u4EAC\u4E92\u8054\u7F51\u516C\u53F8\u7684\u6587\u7AE0\u4E2D\u597D\u597D\u53BB\u8BB2\u4E0B\u3002\u8FD9\u7BC7\u6587\u7AE0\u53EA\u8BB2\u4E00\u4E2A\u4E8B\uFF0C\u90A3\u5C31\u662F<strong>\u5317\u4EAC\u6237\u53E3</strong>\u3002\u5317\u4EAC\u6237\u53E3\u7684\u4E3B\u8981\u7528\u5904\u5C31\u662F\u5B50\u5973\u6559\u80B2\u95EE\u9898\uFF0C\u5176\u5B83\u7684\u4E00\u4E9B\u597D\u5904\u5C31\u662F\u6709\u5317\u4EAC\u6237\u53E3\u53EF\u4EE5\u7533\u8BF7\u5171\u6709\u4EA7\u6743\u623F\u8FD8\u6709\u6447\u8F66\u724C\u7B49\u3002\u5E94\u5C4A\u6BD5\u4E1A\u751F\u662F\u6700\u597D\u641E\u5B9A\u6237\u53E3\u7684\u65F6\u5019\u4E86\uFF0C\u5982\u679C\u4F60\u80FD\u8FDB\u8FD9\u7BC7\u6587\u7AE0\u4E2D\u8BB2\u7684\u8FD9\u4E9B\u5355\u4F4D\uFF0C\u5927\u6982\u7387\u4F60\u662F\u6709\u6237\u53E3\u7684\u3002\u4E0D\u8FC7\u62FF\u6237\u53E3\u7684\u540C\u65F6\u90FD\u8981\u7B7E\u4E00\u4E2A\u4E94\u5E74\u7684\u670D\u52A1\u671F\u5408\u540C\uFF0C\u8FDD\u7EA6\u91D1\u6BCF\u4E2A\u5355\u4F4D\u4E0D\u4E00\u6837\uFF0C 20\u4E07-50\u4E07\u4E0D\u7B49\uFF0C\u9010\u5E74\u9012\u51CF\u3002\u5BF9\u4E8E\u5E94\u5C4A\u751F\u6765\u8BF4\u6237\u53E3\u8C8C\u4F3C\u5438\u5F15\u529B\u6CA1\u6709\u7279\u522B\u7684\u5927\uFF0C\u6BD5\u7ADF\u73B0\u5728\u81EA\u5DF1\u8FD8\u987E\u4E0D\u8FC7\u6765\uFF0C\u4E5F\u4E0D\u77E5\u9053\u81EA\u5DF1\u5B50\u5973\u5728\u54EA\u5462\u3002\u4F46\u662F\u5BF9\u4E8E\u5DF2\u7ECF\u6709\u5B50\u5973\u7684\u4EBA\u6765\u8BF4\uFF0C\u6211\u4E00\u63D0\u7ED9\u5317\u4EAC\u6237\u53E3\u7684\u4E8B\u4ED6\u4EEC\u773C\u775B\u5C31\u4EAE\u4E86\u3002</p><p>\u5317\u4EAC\u8FD9\u4E9B\u5E74\u5BF9\u4E8E\u6237\u53E3\u6709\u4E5F\u9010\u6E10\u653E\u5BBD\uFF0C\u4E00\u4E9B\u4E92\u8054\u7F51\u516C\u53F8\u7684\u7279\u6B8A\u5E94\u5C4A\u62DB\u8058\u8BA1\u5212\u4E5F\u4F1A\u7ED9\u6237\u53E3\uFF0C\u53E6\u5916\u4ECA\u5E74\u53CC\u4E00\u6D41\u5B66\u79D1\u7684\u7855\u58EB\u4EE5\u4E0A\u5E94\u5C4A\u6BD5\u4E1A\u751F\u90FD\u7ED9\u6237\u53E3\u4E86\u3002</p><p>\u53E6\u5916\u60F3\u8981\u6237\u53E3\u8FD8\u53EF\u4EE5\u8D70\u79EF\u5206\u843D\u6237\uFF0C\u4E0D\u8FC7\u60F3\u8981\u9760\u79EF\u5206\u843D\u6237\u89E3\u51B3\u5317\u4EAC\u6237\u53E3\uFF0C\u5C31\u9700\u8981\u4F60\u5934\u4E0A\u6709\u7284\u89D2\uFF0C\u8EAB\u540E\u6709\u5C3E\u5DF4\u4E86\u3002</p><p>\u597D\u5566\uFF0C\u8FD9\u7BC7\u6587\u7AE0\u5C31\u4ECB\u7ECD\u8FD9\u4E48\u591A\uFF0C\u671F\u5F85\u4E0B\u4E00\u7BC7\u5317\u4EAC\u6709\u54EA\u4E9B\u5927\u578B\u4E92\u8054\u7F51\u516C\u53F8\u548C\u5916\u4F01\u5427\uFF01</p><h3 id="\u4E92\u8054\u7F51\u5927\u5382" tabindex="-1"><a class="header-anchor" href="#\u4E92\u8054\u7F51\u5927\u5382" aria-hidden="true">#</a> \u4E92\u8054\u7F51\u5927\u5382</h3><p>\u8C08\u5230\u4E92\u8054\u7F51\u516C\u53F8\uFF0C\u514D\u4E0D\u4E86\u8BF4\u85AA\u8D44\u3002\u5F88\u591A\u5E94\u5C4A\u751F\u6821\u62DB\u65F6\u7531\u4E8E\u6CA1\u6709\u5DE5\u4F5C\u7ECF\u9A8C\uFF0C\u5BB9\u6613\u88AB\u54C4\u3002\u9996\u5148\u8981\u77E5\u9053\uFF0C\u6821\u62DB\u7ED9\u4F60\u5F00\u51FA\u7684\u85AA\u8D44\u662F\u53EF\u4EE5 argue \u7684\uFF0C\u4E5F\u5C31\u662F\u8BF4\u53EF\u4EE5\u548C hr \u5546\u91CF\u3002\u7136\u540E\u6211\u4E3B\u8981\u60F3\u8BF4\u7684\u662F\uFF0C\u8981\u8C08\u4F60\u53BB\u548C HR \u8C08 <strong>base</strong>\uFF08\u6BCF\u6708\u57FA\u7840\u5DE5\u8D44\uFF09, \u53EF\u4E0D\u6562\u53BB\u548C hr argue \u6BCF\u5E74\u591A\u5C11\u85AA\u54C8\u3002\u4E00\u4E2A\u54E5\u4EEC\u7ED9\u6211\u8BB2\u4E86\u4E2A\u771F\u4E8B\uFF0C\u4ED6\u4EEC\u516C\u53F8\u4E00\u4E2A\u5E94\u5C4A\u751F\u5ACC 25k x 15 \u5C11\uFF0CHR \u8DDF\u4ED6\u8BF4\u90A3\u7ED9\u4F60 25k X 16 \u5427\uFF0C\u7136\u540E\u90A3\u4E2A\u5E94\u5C4A\u751F\u5C31\u5F00\u5FC3\u7684\u7B54\u5E94\u4E86\u3002HR \u7ED9\u4F60\u627F\u8BFA\u7684\u6BCF\u6708 base \u662F\u6CA1\u95EE\u9898\u7684\uFF0C\u4F46\u662F\u8BF4\u6BCF\u5E74\u53D1\u591A\u5C11\u4E2A\u6708\u7684\u6708\u85AA\u53EA\u662F\u4E00\u4E2A\u671F\u671B\uFF0C\u6700\u7EC8\u7ED9\u4F60\u53D1\u51E0\u4E2A\u6708\u7684\u5E74\u7EC8\u5956\u8981\u6839\u636E\u4F60\u5230\u5E74\u5E95\u7684\u8BC4\u5206\u4EE5\u53CA\u4F60\u6240\u5728\u56E2\u961F\u5E74\u5E95\u7684\u8BC4\u5206\u5171\u540C\u51B3\u5B9A\u3002</p><p>\u4E0B\u9762\u6211\u8BF4\u7684\u5404\u4E2A\u516C\u53F8\u85AA\u8D44\u65F6\u8BF4\u7684\u6BCF\u5E74\u591A\u5C11\u85AA\u4E5F\u662F HR \u8BF4\u7684\u4E00\u4E2A\u671F\u671B\u85AA\u8D44\u5440\uFF01\u8BB8\u591A\u8BF4\u53D1 4 \u4E2A\u6708\u5E74\u7EC8\u5956\u7684\uFF0C\u5B9E\u9645\u4E0A\u4E00\u534A\u4EBA\u62FF\u4E0D\u5230\u3002</p><h4 id="\u767E\u5EA6" tabindex="-1"><a class="header-anchor" href="#\u767E\u5EA6" aria-hidden="true">#</a> \u767E\u5EA6</h4><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-7d1367ae-04c1-4162-aed8-2a99203a623d.jpg" alt=""></p><p>\u5750\u6807\uFF1A\u897F\u5317\u65FA</p><p>2022\u6821\u62DB\u85AA\u8D44\uFF1A\u5F00\u53D1\u5C97\u767D\u83DC\u4EF7 22k\uFF0Csp 24k\uFF0Cssp 26k \u3002\u7B97\u6CD5\u5C97\u767D\u83DC\u4EF7 26k\uFF0Csp 29k\uFF0Cssp 32k\u3002\u6BCF\u5E74 16 \u85AA\u3002</p><p>\u4E2A\u4EBA\u8BC4\u4EF7\uFF1A\u66FE\u7ECF\u5341\u5206\u5F3A\u5927\u7684\u767E\u5EA6\u8FD9\u51E0\u5E74\u9010\u6E10\u548C\u817E\u8BAF\u963F\u91CC\u62C9\u5F00\u4E86\u5DEE\u8DDD\u3002\u4E0D\u8FC7\u5C31\u6211\u4E2A\u4EBA\u800C\u8A00\u8FD8\u662F\u6BD4\u8F83\u559C\u6B22\u767E\u5EA6\u7684\u3002\u9996\u5148\u767E\u5EA6\u662F\u4EE5\u6280\u672F\u4E3A\u5BFC\u5411\u7684\uFF0C\u8FD9\u4E00\u70B9\u4F5C\u4E3A\u7A0B\u5E8F\u5458\u5E94\u8BE5\u4F1A\u6709\u6BD4\u8F83\u597D\u7684\u4F53\u9A8C\uFF0C\u53E6\u5916\u767E\u5EA6\u603B\u4F53\u6765\u8BF4\u52A0\u73ED\u4E0D\u662F\u7279\u522B\u4E25\u91CD\u3002\u5DE5\u4F5C\u5236\u5DEE\u4E0D\u591A 975 \u6216\u8005\u662F 985, \u524D\u4E24\u5468\u6211\u8D81\u7740\u53BB\u627E\u5728\u767E\u5EA6\u7684\u540C\u5B66\u73A9\u7684\u673A\u4F1A\uFF0C\u5468\u516D\u4E0B\u5348\u4E09\u70B9\u5DE6\u53F3\u5728\u767E\u5EA6\u5927\u697C\u91CC\u8F6C\u4E86\u4E00\u5708\uFF0C\u6700\u8D77\u7801\u5468\u672B\u662F\u6CA1\u51E0\u4E2A\u5DE5\u4F4D\u4E0A\u6709\u4EBA\u7684\u3002\u5DE5\u4F4D\u4E0A\u6709\u4EBA\u7684\u770B\u6837\u5B50\u4E5F\u662F\u8D81\u5468\u672B\u60F3\u81EA\u5DF1\u5355\u72EC\u5B66\u4E60\u4F1A\u3002\u53E6\u5916\u767E\u5EA6\u7684\u529E\u516C\u73AF\u5883\u8FD8\u4E0D\u9519\uFF0C\u98DF\u5802\u4E5F\u5F88\u597D\u3002\u767E\u5EA6\u5728\u5317\u4EAC\u7684\u90E8\u95E8\u4EE5\u53CA\u5C97\u4F4D\u90FD\u7279\u522B\u9F50\u5168\uFF0C\u53EA\u662F\u5927\u91CF\u7684\u5F00\u53D1\u5C97\u4F4D\u7528 php \u6709\u70B9\u96BE\u9876\u3002</p><p>\u767E\u5EA6\u8FD9\u4E24\u5E74\u96C6\u4E2D\u53D1\u5C55\u4EBA\u5DE5\u667A\u80FD\uFF0C\u8FD9\u4E00\u70B9\u5728\u7ED9\u6821\u62DB\u5F00\u51FA\u7684\u85AA\u8D44\u4E0A\u4E5F\u80FD\u770B\u5F97\u51FA\u6765\u3002\u4E0D\u5F97\u4E0D\u8BF4\u8FD9\u4E24\u5E74\u6821\u62DB\u7684\u85AA\u8D44\u662F\u771F\u9AD8\u5440\uFF0C\u5C31\u4E0D\u7528\u8BF4\u7B97\u6CD5\u5C97\u6821\u62DB\u7684\u85AA\u8D44\uFF0C\u5F00\u53D1\u5C97\u6821\u62DB\u7684\u85AA\u8D44\u90FD\u5012\u6302\u4E86\u4E0D\u5C11\u8001\u5458\u5DE5\u3002\u767E\u5EA6\u5728\u7B97\u6CD5\u4E0A\u6295\u5165\u7684\u51B3\u5FC3\u662F\u633A\u5927\u7684\uFF0C\u81EA\u5DF1\u80FD\u641E\u51FA\u6DF1\u5EA6\u5B66\u4E60\u6846\u67B6 PaddlePaddle \u5341\u5206\u8BA9\u6211\u656C\u4F69\u3002\u8BFB\u7814\u65F6\u5B9E\u9A8C\u5BA4\u663E\u5361\u4E0D\u591F\u6211\u8FD8\u7ECF\u5E38\u4E0A\u767E\u5EA6\u7684 AI Studio \u5E73\u53F0\u4E0A\u8585\u7F8A\u6BDB\uFF0C\u6709\u6B21\u987A\u624B\u6253\u4E86\u4E2A\u6BD4\u8D5B\u5F97\u4E86\u4E2A\u540D\u6B21\uFF0C\u6392\u540D\u4E0D\u9AD8\uFF0C\u4F46\u767E\u5EA6\u8FD8\u771F\u7ED9\u6211\u5BC4\u6765\u51E0\u767E\u5757\u94B1\u7684\u8D2D\u7269\u5238\u3002\u53EA\u662F\u6700\u8FD1\u767E\u5EA6\u65E0\u4EBA\u8F66\u8FDB\u5C55\u7684\u4E0D\u592A\u987A\u5229\uFF0C\u611F\u89C9\u662F\u767E\u5EA6\u4EBA\u5DE5\u53EA\u80FD\u53D1\u5C55\u7684\u4E00\u5927\u632B\u6298\u4E86\u3002</p><h4 id="\u817E\u8BAF" tabindex="-1"><a class="header-anchor" href="#\u817E\u8BAF" aria-hidden="true">#</a> \u817E\u8BAF</h4><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-7d6cd775-8895-447a-a348-27443594bdcd.jpg" alt=""></p><p>\u5750\u6807\uFF1A\u897F\u5317\u65FA</p><p>2022\u6821\u62DB\u85AA\u8D44\uFF1A19-25k\uFF0C\u6BCF\u5E74 16 \u85AA\uFF1B\u6BCF\u6708 4k \u79DF\u623F\u8865\u8D34\uFF1B6-10 w\u7684\u7B7E\u5B57\u8D39\u5206\u4E24\u5E74\u53D1\u653E\u3002</p><p>\u4E2A\u4EBA\u8BC4\u4EF7\uFF1A\u5317\u4EAC\u8FD9\u8FB9\u817E\u8BAF\u548C\u767E\u5EA6\u7684\u529E\u516C\u697C\u79BB\u5F97\u5F88\u8FD1\uFF0C\u817E\u8BAF\u5728\u5317\u4EAC\u8FD9\u8FB9\u7684\u90E8\u95E8\u4E3B\u8981\u662F PCG \u4E8B\u4E1A\u7FA4\uFF08PCG \u4E2D\u90FD\u662F\u817E\u8BAF\u548C\u5A92\u4F53\u5BA3\u4F20\u76F8\u5173\u7684\u90E8\u95E8\uFF0C\u5305\u542B\u817E\u8BAF\u89C6\u9891\u3001\u817E\u8BAF\u65B0\u95FB\u3001\u817E\u8BAFQQ\u7B49\uFF0C\u53E6\u5916\u592E\u89C6\u9891\u4E5F\u662F\u5305\u7ED9\u5317\u4EAC\u8FD9\u8FB9\u7684\u817E\u8BAF\u505A\u7684\u3002\u8BDD\u8BF4PCG \u5728\u8109\u8109\u4E0A\u88AB\u55B7\u7684\u5F88\u60E8\uFF09\u3002\u817E\u8BAF\u4E3B\u8981\u7528\u7684\u8BED\u8A00\u662F C++ \u548C Go\uFF0C\u6211\u89C1\u8FC7\u4E00\u4E2A\u90E8\u95E8\u62DB Java \u7684\uFF0C\u4E0D\u8FC7\u4E00\u65B9\u9762\u662F\u62DB\u7684\u4EBA\u6570\u592A\u5C11\uFF0C\u4E00\u65B9\u9762\u5728\u817E\u8BAF\u505A Java \u603B\u89C9\u5F97\u6709\u70B9\u602A\u602A\u7684\u3002\u4ECB\u7ECD\u767E\u5EA6\u65F6\u8BF4\u7684\u767E\u5EA6\u662F\u4EE5\u6280\u672F\u4E3A\u5BFC\u5411\u7684\u662F\u8BF4\u7ED9\u817E\u8BAF\u542C\u7684\uFF0C\u56E0\u4E3A\u817E\u8BAF\u662F\u4EE5\u4EA7\u54C1\u4E3A\u5BFC\u5411\u7684\u3002\u4EA7\u54C1\u7684\u8BDD\u8BED\u6743\u6BD4\u7A0B\u5E8F\u5458\u5927\u3002</p><p>\u817E\u8BAF\u7684\u798F\u5229\u662F\u7279\u522B\u9999\u7684\uFF0C\u98DF\u5802\u4E5F\u5F88\u597D\u3002\u7279\u522B\u4ECA\u5E74\u628A\u79DF\u623F\u8865\u8D34\u6DA8\u5230\u4E864k\u3002\u90A3\u80AF\u5B9A\u6709\u9E45\u9009\u9E45\u5440\u3002</p><p>\u8FD1\u671F\u641C\u72D7\u4E5F\u5E76\u5165\u817E\u8BAF\u4E86\uFF0C\u5E76\u5230\u4E86\u817E\u8BAF\u7684 Pcg \u4E8B\u4E1A\u7FA4\u4E0B\uFF0C\u76EE\u524D\u5404\u65B9\u9762\u5DF2\u7ECF\u548C\u817E\u8BAF\u5BF9\u9F50\u4E86\u3002\u6211\u6709\u4E2A\u540C\u5B66\u5148\u5728\u817E\u8BAF\u7684 PCG \u5B9E\u4E60\uFF0C\u7136\u540E\u6821\u62DB\u6700\u7EC8\u9009\u62E9\u4E86\u53BB\u641C\u72D7\uFF0C\u7ED3\u679C\u53C8\u88AB\u5E76\u56DE PCG \u4E86\uFF0C\u4E5F\u662F\u7279\u522B\u7684\u7F18\u5206\u3002\u4E0A\u9762\u7684\u56FE\u5C31\u662F\u6211\u5728\u641C\u72D7\u8336\u6C34\u95F4\u62CD\u5230\u7684\u7167\u7247~\u53EF\u4EE5\u770B\u5230\u5DF2\u7ECF\u90FD\u6362\u6210\u817E\u8BAF logo \u4E86\u3002\u641C\u72D7\u4E0D\u5728\u897F\u5317\u65FA\uFF0C\u641C\u72D7\u5728\u4E94\u9053\u53E3\u9644\u8FD1\u5440\u3002</p><h4 id="\u963F\u91CC\u5DF4\u5DF4" tabindex="-1"><a class="header-anchor" href="#\u963F\u91CC\u5DF4\u5DF4" aria-hidden="true">#</a> \u963F\u91CC\u5DF4\u5DF4</h4><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-996bbbca-dd9c-4108-b796-46f29dd840e9.jpg" alt=""></p><p>\u5750\u6807\uFF1A\u671B\u4EAC</p><p>2022\u6821\u62DB\u85AA\u8D44\uFF1A\u5F00\u53D1\u5C97\u767D\u83DC\u4EF7 21-24k\uFF0Csp 25-28k\uFF0Cssp 29-30k\u3002\u7B97\u6CD5\u5C97\u767D\u83DC\u4EF7 25k\uFF0Csp 29-31k\uFF0Cssp 33-36k\u3002\u6BCF\u5E74 16 \u85AA\uFF0C\u7B7E\u5B57\u8D39 1-10w\uFF0C\u8FD8\u4F1A\u989D\u5916\u53D1 6k \u7684\u642C\u5BB6\u8D39\u3002</p><p>\u4E2A\u4EBA\u8BC4\u4EF7\uFF1A\u5317\u4EAC\u7684\u963F\u91CC\u5DF4\u5DF4\u5927\u697C\u5728\u671B\u4EAC\u3002\u53E6\u5916\u76EE\u524D\u963F\u91CC\u5DF4\u5DF4\u7684\u5317\u4EAC\u603B\u90E8\u4E5F\u5728\u5EFA\u8BBE\u4E2D\uFF0C\u9884\u8BA12023\u5E74\u6295\u5165\u4F7F\u7528\u3002\u963F\u91CC\u5DF4\u5DF4\u8FD1\u4E24\u5E74\u4E00\u76F4\u6709\u8D1F\u9762\u6D88\u606F\uFF0C\u6211\u4E2A\u4EBA\u800C\u8A00\u4E5F\u4E0D\u592A\u559C\u6B22\u963F\u91CC\u7684\u72FC\u6027\u6587\u5316\u3002\u4F46\u662F\u6709\u4E00\u8BF4\u4E00\uFF0C\u963F\u91CC\u7684\u6280\u672F\u5728\u56FD\u5185\u7684\u4E92\u8054\u7F51\u662F\u6570\u4E00\u6570\u4E8C\u7684\u3002\u4ECE\u963F\u91CC\u51FA\u6765\u7684\u804C\u5DE5\u8DF3\u69FD\u7684\u8BA4\u53EF\u5EA6\u7EDD\u5BF9\u662F\u5F88\u9AD8\u7684\u3002\u4E0D\u8FC7\u8FD8\u662F\u6C42\u6C42\u4F60\u4EEC\u522B\u5377\u5566\uFF01</p><h4 id="\u5B57\u8282\u8DF3\u52A8" tabindex="-1"><a class="header-anchor" href="#\u5B57\u8282\u8DF3\u52A8" aria-hidden="true">#</a> \u5B57\u8282\u8DF3\u52A8</h4><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-fd757b6c-154c-4aa6-95a8-467d6a9a83b4.jpg" alt=""></p><p>\u5750\u6807\uFF1A\u4E2D\u822A\u5E7F\u573A</p><p>2022\u6821\u62DB\u85AA\u8D44\uFF1A\u5F00\u53D1\u5C97\u767D\u83DC\u4EF722-24k\uFF0Csp 26-28k\uFF0Cssp 30-33k\u3002\u7B97\u6CD5\u5C97\u767D\u83DC\u4EF726-29k\uFF0Csp 30-32k\uFF0Cssp 35k\u3002\u6BCF\u5E7415\u85AA\uFF0C\u8FD8\u67091w-12w\u7684\u7B7E\u5B57\u8D39\uFF0C\u6211\u770B\u5927\u90E8\u5206\u662F 1w\uFF01\u4F4F\u5728 30\u5206\u949F\u5185\u53EF\u4EE5\u5230\u8FBE\u516C\u53F8\u7684\u5730\u65B9\u989D\u5916\u4F1A\u6709 1500 \u7684\u79DF\u623F\u8865\u8D34\u3002</p><p>\u4E2A\u4EBA\u8BC4\u4EF7\uFF1A\u76EE\u524D\u5B57\u8282\u6162\u6162\u7684\u628A BAT \u4E2D\u7684 B \u6362\u6210\u4E86 ByteDance \u7684 B\uFF0C\u5B57\u8282\u76EE\u524D\u6280\u672F\u7684\u8BA4\u53EF\u5EA6\u662F\u5F88\u9AD8\u7684\u3002\u6211\u7684\u4E00\u4F4D\u5B66\u957F 18 \u5E74\u65F6\u7EA0\u7ED3\u53BB\u4EAC\u4E1C\u8FD8\u662F\u53BB\u5B57\u8282\uFF0818\u5E74\u65F6\u6211\u542C\u5B57\u8282\u8DF3\u52A8\u8FD9\u4E2A\u540D\u5B57\u8FD8\u6709\u4E9B\u8BB8\u964C\u751F\uFF09\uFF0C\u6700\u7EC8\u53BB\u4E86\u5B57\u8282\u3002\u7136\u540E\u4ED6\u73B0\u5728\u7684\u85AA\u8D44\u5DF2\u7ECF\u8BA9\u6211\u5341\u5206\u60CA\u53F9\u4E86\u3002\u5B57\u8282\u8DF3\u52A8\u7684\u798F\u5229\u5F85\u9047\u4E5F\u7279\u522B\u597D\uFF0C\u6700\u8FD1\u56E0\u4E3A\u4E1A\u52A1\u5F71\u54CD\u88C1\u5E94\u5C4A\u751F\u867D\u7136\u662F\u65E0\u5948\u4E4B\u4E3E\uFF0C\u4E0D\u8FC7\u6216\u591A\u6216\u5C11\u5BF9\u516C\u53F8\u6709\u70B9\u5F71\u54CD\u3002\u5B57\u8282\u6700\u8FD1\u5728\u897F\u5B89\u8BBE\u7ACB\u4E86\u7814\u53D1\u4E2D\u5FC3\uFF0C\u53E6\u5916\u542C\u8BF4\u5728\u9752\u5C9B\u5F00\u4E86\u4E00\u4E2A\u5143\u5B87\u5B99\u7814\u53D1\u4E2D\u5FC3\uFF0C\u5DE5\u4F5C\u5730\u70B9\u5728\u5E02\u5317\uFF0C\u6821\u62DB\u62DB\u4EBA\uFF0C\u611F\u5174\u8DA3\u7684\u53EF\u4EE5\u53BB\u770B\u770B\u3002</p><h4 id="\u7F8E\u56E2" tabindex="-1"><a class="header-anchor" href="#\u7F8E\u56E2" aria-hidden="true">#</a> \u7F8E\u56E2</h4><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-809a1c71-7a8f-43c8-ad4b-befab2fe5cf2.jpg" alt=""></p><p>\u5750\u6807\uFF1A\u671B\u4EAC</p><p>2022\u6821\u62DB\u85AA\u8D44\uFF1A\u5F00\u53D1\u5C97\u767D\u83DC\u4EF721k\uFF0Csp 24k\uFF0Cssp 27-29k\u3002\u7B97\u6CD5\u5C97\u767D\u83DC\u4EF7 24k\uFF0Csp 27k\uFF0Cssp30-32k\u3002\u6BCF\u5E7415.5\u85AA\u3002\u5176\u4F59\u7684\u798F\u5229\u4E5F\u5C31\u662F\u6BCF\u5929 30 \u996D\u8865\u548C 9 \u70B9\u4EE5\u540E\u6253\u8F66\u4E86\u3002</p><p>\u4E2A\u4EBA\u8BC4\u4EF7\uFF1A\u7F8E\u56E2\u7684\u6280\u672F\u7EDD\u5BF9\u6CA1\u5F97\u8BF4\uFF0C\u7279\u522B\u662F\u5BF9\u4E8E\u5E94\u5C4A\u751F\u6709\u4E0D\u9519\u7684\u57F9\u517B\uFF0C\u7F8E\u56E2\u7684\u5B66\u57CE\u4E0A\u6709\u5F88\u591A\u8D28\u91CF\u5F88\u9AD8\u7684\u6280\u672F\u8D44\u6599\uFF0C\u8BB8\u591A\u4ECE\u7F8E\u56E2\u79BB\u804C\u7684\u5458\u5DE5\u90FD\u60F3\u5FF5\u7F8E\u56E2\u7684\u5B66\u57CE\u3002\u53E6\u5916\u7ED9\u7684\u85AA\u8D44\u4ECE\u53BB\u5E74\u85AA\u8D44\u5927\u6DA8\u540E\u4E5F\u7B97\u4E0D\u9519\u4E86\u3002\u867D\u7136\u4ECA\u5E74\u6821\u62DB\u6BD4\u53BB\u5E74\u6CA1\u600E\u4E48\u6DA8\uFF0C\u53EA\u662F\u5728 ssp \u7684\u85AA\u8D44\u4E0A\u505A\u4E86\u4E00\u4E9B\u8C03\u6574\uFF0C\u4F46\u662F\u51ED\u826F\u5FC3\u8BB2\uFF0C\u4E00\u4E2A\u5E94\u5C4A\u751F\u8FD9\u4E2A\u4EF7\u786E\u5B9E\u4E0D\u4F4E\u4E86\u3002\u4E0D\u8FC7\u7F8E\u56E2\u7684\u529E\u516C\u73AF\u5883\u548C\u798F\u5229\u5C31\u592A\u5DEE\u52B2\u4E86\uFF0C\u9996\u5148\u7F8E\u56E2\u7684\u529E\u516C\u5927\u697C\u90FD\u662F\u79DF\u7684\uFF0C\u5DE5\u4F4D\u4E5F\u90FD\u5F88\u7B80\u964B\uFF0C\u4E5F\u6CA1\u98DF\u5802\u3002\u522B\u7684\u516C\u53F8\u8FC7\u8282\u53D1\u793C\u54C1\uFF0C\u597D\u5BB6\u4F19\uFF0C\u4F60\u56E2\u53D1\u4E2A\u8D3A\u5361\uFF0C\u8981\u4E48\u53D1\u4E2A\u5FAE\u4FE1\u7684\u7EA2\u5305\u4E13\u5C5E\u5C01\u76AE...</p><h4 id="\u4EAC\u4E1C" tabindex="-1"><a class="header-anchor" href="#\u4EAC\u4E1C" aria-hidden="true">#</a> \u4EAC\u4E1C</h4><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-e08e1eef-6561-4057-a12e-3a1183fb9ae1.png" alt=""></p><p>\u5750\u6807\uFF1A\u4EA6\u5E84</p><p>2022\u6821\u62DB\u85AA\u8D44: \u5F00\u53D1\u5C97\u767D\u83DC\u4EF7 19.5-23k\uFF0Csp 25-26.5k\uFF0Cssp 29k\u3002\u7B97\u6CD5\u5C97\u767D\u83DC\u4EF7 27.5k\uFF0Csp 31-33.5k\uFF0Cssp 36.5k\u3002\u6BCF\u5E74 15 \u85AA\u3002</p><p>\u4E2A\u4EBA\u8BC4\u4EF7\uFF1A\u9996\u5148\u8BF4\u5750\u6807\u54E6\uFF0C\u4EAC\u4E1C\u5728\u4EA6\u5E84\uFF0C\u79DF\u623F\u4F1A\u76F8\u5BF9\u4FBF\u5B9C\u4E00\u4E9B\uFF0C\u7701\u5230\u5C31\u662F\u8D5A\u5230\u3002\u7136\u540E\u8BF4\u85AA\u8D44\uFF0C\u4EAC\u4E1C\u6709\u4E2A\u4E0D\u592A\u597D\u7684\u5730\u65B9\u5C31\u662F\u85AA\u8D44\u7684 20% \u662F\u7EE9\u6548\uFF0C\u867D\u7136\u7EE9\u6548\u4E00\u822C\u90FD\u80FD\u62FF\u6EE1\uFF0C\u4F46\u662F\u8FD9\u90E8\u5206\u7EE9\u6548\u5C31\u4E0D\u7528\u4EA4\u4F4F\u623F\u516C\u79EF\u91D1\u4E86\u5440\u3002\u4EAC\u4E1C\u5468\u672B\u5F88\u5C11\u52A0\u73ED\uFF0C\u5468\u5185\u5927\u90E8\u5206 8 \u70B9\u5DE6\u53F3\u4E0B\u73ED\u7684\u6837\u5B50\u3002</p><h4 id="\u7F51\u6613" tabindex="-1"><a class="header-anchor" href="#\u7F51\u6613" aria-hidden="true">#</a> \u7F51\u6613</h4><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-fc7b1b08-0363-4af6-adc2-e6185c55bb9c.png" alt=""></p><p>\u5750\u6807:\u897F\u5317\u65FA</p><p>2022\u6821\u62DB\u85AA\u8D44:\u5317\u4EAC\u8FD9\u8FB9\u7F51\u6613\u7684\u85AA\u8D44\u5212\u5206\u7684\u4E0D\u592A\u660E\u786E\uFF0C\u6211\u770B\u5F00\u53D1\u7206\u6599\u51FA\u7684\u6708\u85AA\u4ECE 18.4k\u300122k\u300124k\u300125.5k\u7684\u90FD\u6709\u3002\u7B97\u6CD5\u7206\u51FA\u7684\u6708\u85AA 25.5k\uFF0C27.5k, 30k\u7684\u90FD\u6709\u3002\u6BCF\u5E74 15 \u85AA\u3002</p><p>\u4E2A\u4EBA\u8BC4\u4EF7:\u5317\u4EAC\u8FD9\u8FB9\u57FA\u672C\u4E0A\u90FD\u662F\u7F51\u6613\u6709\u9053\u56E2\u961F\u7684\uFF0C\u4ECA\u5E74\u85AA\u8D44\u7ED9\u7684\u4E0D\u592A\u884C\u5440\uFF0C\u4E0D\u8FC7\u6211\u767E\u5EA6\u7684\u670B\u53CB\u548C\u6211\u8BF4\u4ED6\u6BCF\u6B21\u665A\u4E0A\u770B\u7F51\u6613\u5927\u697C\u7684\u706F\u603B\u662F\u5173\u7684\u6700\u65E9\u7684\uFF08\u897F\u5317\u65FA\u805A\u96C6\u7684\u51E0\u5BB6\u516C\u53F8\u5728\u697C\u4E0A\u53EF\u4EE5\u4E92\u76F8\u770B\u5230\u5BF9\u65B9\uFF09</p><h3 id="\u5927\u578B\u5916\u4F01" tabindex="-1"><a class="header-anchor" href="#\u5927\u578B\u5916\u4F01" aria-hidden="true">#</a> \u5927\u578B\u5916\u4F01</h3><p>\u5916\u4F01\u7684 wlb\uFF08\u5DE5\u4F5C\u751F\u6D3B\u5E73\u8861\uFF09\u4E00\u76F4\u662F\u5927\u5BB6\u5341\u5206\u559C\u6B22\u7684\uFF0C\u4E0D\u8FC7\u8FD1\u51E0\u5E74\u7531\u4E8E\u56FD\u5185\u4E92\u8054\u7F51\u5927\u5382\u7ED9\u7684\u5B9E\u5728\u592A\u591A\u4E86\u3002\u540C\u6837\u7684\u6C34\u5E73\u56FD\u5185\u4E92\u8054\u7F51\u7ED9\u7684\u85AA\u8D44\u5927\u6982\u4F1A\u6BD4\u5916\u4F01\u591A50%\u5DE6\u53F3\u3002\u53E6\u5916\u4E00\u4E9B\u540C\u5B66\u4E5F\u4F1A\u62C5\u5FC3\u5728\u5916\u4F01\u5F85\u51E0\u5E74\u540E\u5DE5\u4F5C\u548C\u6280\u672F\u9002\u5E94\u4E0D\u4E86\u56FD\u5185\u7684\u5F3A\u5EA6\u3002\u6240\u4EE5\u8BB8\u591A offer \u6536\u5272\u673A\u62FF\u5230\u8BB8\u591A\u5927\u5382 offer \u548C\u5927\u578B\u5916\u4F01 offer \u540E\u4E5F\u4F1A\u72B9\u8C6B\u8BE5\u53BB\u54EA\u3002</p><p>\u8BB8\u591A\u4EBA\u4F1A\u95EE\u9762\u5916\u4F01\u662F\u5426\u9700\u8981\u7528\u82F1\u6587\u9762\u8BD5\uFF1F\u6211\u95EE\u4E86\u51E0\u4F4D\u5728\u5916\u4F01\u7684\u8001\u54E5\uFF0C\u5171\u540C\u7684\u8BF4\u6CD5\u662F\u8981\u770B\u4F60\u9762\u7684\u7EC4\u548C\u804C\u7EA7\u3002\u6709\u7684\u7EC4\u662F\u9891\u7E41\u548C\u56FD\u5916\u5F00\u4F1A\u4EA4\u6D41\u7684\uFF0C\u8FD9\u81EA\u7136\u9700\u8981\u4F60\u82F1\u8BED\u597D\uFF0C\u4F46\u662F\u5982\u679C\u4F60\u9762\u7684\u7EC4\u548C\u56FD\u5916\u5F00\u4F1A\u5C11\uFF0C\u90A3\u4E48\u5C31\u4E0D\u9700\u8981\u4F60\u82F1\u8BED\u597D\u3002\u53E6\u5916\u770B\u4F60\u9762\u7684\u804C\u7EA7\u662F\u5426\u6BD4\u8F83\u9AD8\uFF0C\u5982\u679C\u804C\u7EA7\u9AD8\uFF0C\u548C\u56FD\u5916\u4EA4\u6D41\u7684\u4E8B\u81EA\u7136\u5C11\u4E0D\u4E86\u3002\u4F46\u662F\u5982\u679C\u4F60\u53EA\u662F\u7EC4\u957F\u7ED9\u4F60\u5E03\u7F6E\u6D3B\u4F60\u5E72\u7684\u8BDD\uFF0C\u4E5F\u4E0D\u9700\u8981\u4F60\u82F1\u8BED\u597D\u3002</p><h4 id="hulu" tabindex="-1"><a class="header-anchor" href="#hulu" aria-hidden="true">#</a> Hulu</h4><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-483d5154-671c-4ef4-844c-3240f34b6008.png" alt=""></p><p>\u5750\u6807\uFF1A\u671B\u4EAC</p><p>2022\u6821\u62DB\u85AA\u8D44\uFF1AHulu \u62DB\u4EBA\u7684\u91CF\u4E0D\u5927\uFF0C\u6240\u4EE5\u7206\u6599\u85AA\u8D44\u7684\u4EBA\u4E0D\u591A\u3002\u6709\u9650\u7684\u51E0\u4E2A\u7206\u6599\u7684\u5E74\u5305\u90FD\u5728 50w \u4EE5\u4E0A\u3002</p><p>\u4E2A\u4EBA\u8BC4\u4EF7\uFF1A\u53EF\u80FD\u505A\u5F00\u53D1\u7684\u540C\u5B66\u6CA1\u542C\u8BF4\u8FC7\u8FD9\u4E2A\u516C\u53F8\uFF0C\u4E0D\u8FC7\u505A\u7B97\u6CD5\u7684\u540C\u5B66\u5E94\u8BE5\u77E5\u9053\u8FD9\u5BB6\u516C\u53F8\u7684\u5F88\u591A\uFF0C\u8FD9\u5BB6\u516C\u53F8\u51FA\u4E86\u4E00\u672C\u633A\u4E0D\u9519\u7684\u4E66\u7C4D\u53EB\u300A\u767E\u9762\u673A\u5668\u5B66\u4E60\u300B\u3002\u6709\u8BB8\u591A\u540C\u5B66\u5E94\u8BE5\u5728\u51C6\u5907\u7B97\u6CD5\u9762\u8BD5\u65F6\u770B\u8FC7\u8FD9\u672C\u4E66\u3002Hulu \u662F\u7F8E\u56FD\u7684\u4E00\u4E2A\u6BD4\u8F83\u70ED\u7684\u89C6\u9891\u7F51\u7AD9\u3002\u4E25\u683C\u7684\u6765\u8BF4 Hulu \u5E94\u8BE5\u7B97\u662F\u4E00\u5BB6\u5C0F\u800C\u7F8E\u7684\u516C\u53F8\uFF0C\u4E0D\u80FD\u7B97\u5927\u578B\u4F01\u4E1A\u3002\u4F46\u662F\u56E0\u4E3A Hulu \u5DE5\u8D44\u4E0D\u9519\uFF0C\u6280\u672F\u5F88\u597D\uFF0C\u53E6\u5916\u4E5F\u4E0D\u52A0\u73ED\u3002\u6240\u4EE5 Hulu \u7684 offer \u6BD4\u8BB8\u591A\u5927\u578B\u4F01\u4E1A\u7684 offer \u8FD8\u6709\u8BF1\u60D1\u529B\u3002</p><h4 id="\u5FAE\u8F6F" tabindex="-1"><a class="header-anchor" href="#\u5FAE\u8F6F" aria-hidden="true">#</a> \u5FAE\u8F6F</h4><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-e0dbb967-2bb3-453f-8384-02c1c0aa61a0.png" alt=""></p><p>\u5750\u6807\uFF1A\u79BB\u4E94\u9053\u53E3\u4E5F\u4E0D\u8FDC\u3002</p>',114),s=a("\u4E2A\u4EBA\u8BC4\u4EF7\uFF1A\u5FAE\u8F6F\u7684\u85AA\u8D44\u60C5\u51B5\u548C\u9762\u8BD5\u8003\u5BDF\u91CD\u70B9\u7B49\u5728\u4ECB\u7ECD\u82CF\u5DDE\u65F6\u5DF2\u7ECF\u8BE6\u7EC6\u4ECB\u7ECD\u8FC7\u4E86\uFF0C\u5C31\u4E0D\u5728\u91CD\u590D\u4ECB\u7ECD\u4E86\uFF0C\u5927\u5BB6\u611F\u5174\u8DA3\u7684\u53EF\u4EE5\u770B"),o={href:"https://mp.weixin.qq.com/s/rM5ZpId7O2OBzFb5sHcjeA",target:"_blank",rel:"noopener noreferrer"},l=a("\u8FD9\u91CC"),g=a("\u3002\u4E0D\u8FC7\u76F8\u6BD4\u5728\u5FAE\u8F6F\u82CF\u5DDE\u5DE5\u4F5C\u800C\u8A00\uFF0C\u5728\u5317\u4EAC\u7684\u623F\u4EF7\u548C\u6D88\u8D39\u60C5\u51B5\u6C34\u5E73\u4E0B\uFF0C\u5FAE\u8F6F\u5317\u4EAC\u7684\u85AA\u8D44\u5C31\u4E0D\u7B97\u592A\u9999\u4E86\u3002\u4EC0\u4E48\uFF1F\u7ED9\u6211 offer \u6211\u53BB\u4E0D\u53BB? \u9A6C\u4E0A\u53BB\uFF01 \u5FAE\u8F6F\u5317\u4EAC\u524D\u4E9B\u5E74\u7684\u843D\u6237\u6307\u6807\u6BD4\u8F83\u591A\uFF0C\u4E0D\u8FC7\u8FD1\u51E0\u5E74\u5FAE\u8F6F\u7684\u843D\u6237\u6307\u6807\u76F8\u5BF9\u5C11\u4E00\u4E9B\u4E86\u3002"),f=p('<h4 id="shoppe-\u867E\u76AE" tabindex="-1"><a class="header-anchor" href="#shoppe-\u867E\u76AE" aria-hidden="true">#</a> Shoppe\uFF08\u867E\u76AE\uFF09</h4><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-ea99812c-fdb6-44a6-bc55-79c15ad37a3a.jpg" alt=""></p><p>\u5750\u6807\uFF1A\u4E94\u9053\u53E3\u9644\u8FD1\uFF0C\u548C\u641C\u72D7\u6328\u7740\u3002\u90A3\u7247\u6709\u597D\u591A\u4E92\u8054\u7F51\u516C\u53F8\u3002</p><p>2022\u6821\u62DB\u85AA\u8D44\uFF1A\u767D\u83DC\u4EF7 22k\uFF0Csp 25k\uFF0Cssp 27k\u3002\u67093\u4E07\u7B7E\u5B57\u8D39\uFF0C\u4EE5\u53CA12\u4E07\u80A1\u7968\u5206\u4E09\u5E74\u53D1\u653E\u3002</p><p>\u4E2A\u4EBA\u8BC4\u4EF7\uFF1A\u4F60\u53EF\u4EE5\u628A\u867E\u76AE\u60F3\u8C61\u6210\u4E1C\u5357\u4E9A\u7684\u6DD8\u5B9D\u3002\u6211\u8FD8\u662F\u6BD4\u8F83\u559C\u6B22\u867E\u76AE\u7684\uFF0C\u85AA\u8D44\u5F88\u9AD8\uFF0C\u6280\u672F\u4E5F\u4E0D\u9519\u3002\u4F46\u662F\u7F51\u4F20\u7684 965 \u662F\u6CA1\u51E0\u4E2A\u7EC4\u80FD\u8FBE\u5230\u7684\uFF0C\u867E\u76AE\u8BF4\u662F\u5916\u4F01\u5176\u5B9E\u548C\u56FD\u5185\u4E92\u8054\u7F51\u516C\u53F8\u98CE\u683C\u5DEE\u4E0D\u592A\u591A\u3002\u8FD1\u51E0\u5E74\u867E\u76AE\u4E5F\u8D8A\u6765\u8D8A\u5377\u4E86\u3002\u867E\u76AE\u5468\u516D\u5E94\u8BE5\u662F\u4E0D\u7528\u52A0\u73ED\uFF0C\u524D\u4E24\u5468\u5468\u516D\u6211\u548C\u6211\u540C\u5B66\u53BB\u8F6C\u4E86\u4E00\u5708\uFF0C\u5927\u95E8\u662F\u9501\u7740\u7684\u3002\u542C\u8BF4\u5468\u5185 7 \u70B9\u5230 10 \u70B9\u4E0B\u73ED\u7684\u7EC4\u90FD\u6709\u3002</p><h4 id="amazon" tabindex="-1"><a class="header-anchor" href="#amazon" aria-hidden="true">#</a> Amazon</h4><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-9a9d93ca-89fa-4b67-a491-d085eb2601d3.png" alt=""></p><p>\u5750\u6807\uFF1A\u671D\u9633\u533A\u8FDC\u6D0B\u56FD\u9645\u4E2D\u5FC3</p><p>2022\u6821\u62DB\u85AA\u8D44\uFF1A\u4E9A\u9A6C\u900A\u7684\u57FA\u7840\u5E74\u85AA\u6211\u770B\u5230\u670930w\u548C34.9w \u4E24\u4E2A\u6863\uFF0C\u914D\u7ED9\u5458\u5DE5\u7684\u80A1\u7968\u4E5F\u6709 23w \u548C 27w \u4E24\u4E2A\u6863\uFF08\u7B2C\u4E00\u5E74\u53D15%\uFF0C\u7B2C\u4E8C\u5E74\u53D115%\uFF0C\u7B2C\u4E09\u5E74\u548C\u7B2C\u56DB\u5E74\u90FD\u662F\u53D140%\uFF09\uFF0C\u7B7E\u5B57\u8D39\u7B2C\u4E00\u5E74\u4F1A\u7ED99.5w\u7684\u7B7E\u5B57\u8D39\uFF0C\u7B2C\u4E8C\u5E74\u8FD8\u4F1A\u7ED96.9w\u7684\u7B7E\u5B57\u8D39\u3002</p><p>\u4E2A\u4EBA\u8BC4\u4EF7\uFF1A\u6700\u8FD1\u51E0\u5E74\u5916\u4F01\u4E0D\u5982\u56FD\u5185\u4E92\u8054\u7F51\u5927\u5382\u5F00\u51FA\u7684\u85AA\u8D44\u9AD8\uFF0C\u4F46\u662F\u5916\u4F01\u7684\u517B\u751F\u4E00\u76F4\u662F\u5927\u5BB6\u5341\u5206\u559C\u6B22\u7684\u3002\u4E9A\u9A6C\u900A\u5728\u5916\u4F01\u4E2D\u7B97\u662F\u6BD4\u8F83\u62A0\u7684\uFF0C\u4E0D\u8FC7\u56E0\u4E3A\u8FD1\u51E0\u5E74\u4E9A\u9A6C\u900A\u80A1\u7968\u6DA8\u7684\u591A\uFF0C\u6240\u4EE5\u7ED9\u4E86\u5458\u5DE5\u80A1\u7968\u540E\u5458\u5DE5\u8FD8\u662F\u5927\u8D5A\u3002\u53E6\u5916\u6709\u4E2A\u7F3A\u70B9\u5C31\u662F\u4E9A\u9A6C\u900A\u5728\u56FD\u5185\u7684\u4E1A\u52A1\u76F8\u5BF9\u6BD4\u8F83\u8FB9\u7F18\uFF0C\u4F46\u662F\u4E9A\u9A6C\u900A\u7684\u5149\u73AF\u5F88\u8000\u773C\uFF0C\u5458\u5DE5\u51FA\u6765\u8FD8\u662F\u5F88\u53D7\u6B22\u8FCE\u7684\u3002</p><h4 id="apple" tabindex="-1"><a class="header-anchor" href="#apple" aria-hidden="true">#</a> Apple</h4><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-ba5e8a95-1cf8-42f9-aacc-3573cd93f19f.png" alt=""></p><p>\u5750\u6807\uFF1A\u671D\u9633\u533A\u5EFA\u56FD\u95E8\u5916\u5927\u8857\u56FD\u8D38\u5927\u53A6</p><p>\u4E2A\u4EBA\u8BC4\u4EF7\uFF1A\u82F9\u679C\u7684\u4FDD\u5BC6\u76F8\u5F53\u7684\u4E25\u683C\uFF0C\u6211\u4E5F\u6CA1\u6709\u5173\u7CFB\u597D\u7684\u5728\u82F9\u679C\u4E0A\u73ED\u7684\u670B\u53CB\uFF0C\u6240\u4EE5\u6211\u4E5F\u6CA1\u627E\u5230\u82F9\u679C\u4ECA\u5E74\u6821\u62DB\u7684\u85AA\u8D44\u662F\u591A\u5C11\u3002\u82F9\u679C\u5317\u4EAC\u7684\u4E1A\u52A1\u6BD4\u8F83\u8FB9\u7F18\uFF0C\u5C97\u4F4D\u57FA\u672C\u90FD\u662F\u505A\u529F\u80FD\u672C\u571F\u5316\u7684\u5DE5\u4F5C\u3002\u5DE5\u4F5C\u65F6\u95F4\u662F\u53BB\u6389\u5348\u4F11\u540E\u6EE1 8 \u5C0F\u65F6\u5C31\u53EF\u4EE5\u3002</p><h4 id="airbnb" tabindex="-1"><a class="header-anchor" href="#airbnb" aria-hidden="true">#</a> Airbnb</h4><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-b9d6ef38-e7c1-4e00-8409-2f63489a5d6c.png" alt=""></p><p>\u5750\u6807:\u671D\u9633\u533A\u73AF\u7403\u91D1\u878D\u4E2D\u5FC3</p><p>2022\u6821\u62DB\u85AA\u8D44\uFF1A\u57FA\u7840\u5E74\u85AA35w\uFF0C\u989D\u5916\u57FA\u7840\u85AA\u8D44 15% \u7684\u5956\u91D1\uFF0C8w \u7F8E\u5143\u80A1\u7968\u5206 4 \u5E74\u53D1\u653E\u3002</p><p>\u4E2A\u4EBA\u8BC4\u4EF7\uFF1A\u7231\u5F7C\u8FCE\u4F18\u52BF\u662F wlb\uFF08\u5DE5\u4F5C\u751F\u6D3B\u5E73\u8861\uFF09\uFF0C\u4E14\u85AA\u8D44\u4E5F\u5F88\u4E0D\u9519\uFF0C\u8FD9\u4E2A\u80A1\u7968\u592A\u6709\u8BF1\u60D1\u529B\u4E86\u3002 \u5F53\u7136\u7F3A\u70B9\u4E5F\u662F\u6709\u7684\uFF0C\u8FD9\u91CC\u5F15\u7528\u8109\u8109\u4E0A\u4E00\u4E2A Airbnb \u804C\u5DE5\u7684\u533F\u540D\u8BC4\u8BBA\u201CAirbnb\u5355\u7EAF\u505A\u9879\u76EE\u57FA\u672C\u5B66\u4E0D\u5230\u5565\u6280\u672F \u3001\u6846\u67B6\u5C01\u88C5\u7684\u592A\u5B8C\u5584\u4E14\u90FD\u662F\u4E1A\u52A1\u3002\u81EA\u5B66\u80FD\u529B\u5F3A\u7684\u8BDD\u53EF\u4EE5\u6765\uFF0C\u5982\u679C\u60F3\u5355\u7EAF\u9760\u505A\u9879\u76EE\u63D0\u5347\u80FD\u529B\u5C31\u9700\u8981\u614E\u91CD\u4E86\u201D\u3002\u6211\u611F\u89C9\u8FD9\u4E2A\u633A\u9002\u5408\u6211\u7684\u54E6~ \u4E0A\u73ED\u5E72\u6D3B\uFF0C\u516D\u70B9\u4E0B\u73ED\u518D\u5199\u5199\u6587\u7AE0\uFF0C\u5B8C\u7F8E\u3002</p><p>\u597D\u4E86\uFF0C\u8BE6\u7EC6\u4ECB\u7ECD\u7684\u5C31\u8FD9\u4E48\u591A\u4E86\u3002\u53E6\u5916\u8C37\u6B4C\u7531\u4E8E\u5728\u56FD\u5185\u62DB\u7684\u4EBA\u5341\u5206\u7684\u5C11\uFF0C\u6211\u4E5F\u6CA1\u6709\u5728\u8C37\u6B4C\u4E0A\u73ED\u7684\u5927\u795E\u670B\u53CB\uFF0C\u6240\u4EE5\u8C37\u6B4C\u7684\u4FE1\u606F\u6211\u5C31\u4E0D\u77E5\u9053\u4E86\u3002Paypal \u6211\u627E\u5230\u7684\u4FE1\u606F\u4E5F\u6709\u70B9\u5C11\uFF0C\u4E5F\u4E0D\u5C55\u5F00\u4ECB\u7ECD\u4E86\uFF0C\u8C8C\u4F3C PayPal \u5728\u4E0A\u6D77\u90E8\u95E8\u6BD4\u8F83\u9F50\u5168\uFF0C\u5317\u4EAC\u8FD9\u8FB9\u5DE5\u4F5C\u5730\u70B9\u6211\u6700\u521D\u90FD\u6CA1\u641C\u5230\uFF0C\u8FD8\u662F\u6839\u636E\u670B\u53CB\u5708\u4E00\u4E2A\u670B\u53CB\u63D0\u9192\u5728 boss \u4E0A\u627E\u5230\u7684\uFF0C\u5728\u671D\u9633\u533A\u91D1\u5730\u4E2D\u5FC3\u3002</p><h2 id="\u751F\u6D3B\u6210\u672C" tabindex="-1"><a class="header-anchor" href="#\u751F\u6D3B\u6210\u672C" aria-hidden="true">#</a> \u751F\u6D3B\u6210\u672C</h2><p>\u5728\u5317\u4EAC\u7684\u751F\u6D3B\u5C31\u4EC1\u8005\u89C1\u4EC1\u667A\u8005\u89C1\u667A\u4E86\uFF0C\u6709\u7684\u4EBA\u559C\u6B22\u4ED6\u7684\u7E41\u534E\u4E0E\u673A\u9047\uFF0C\u6709\u7684\u4EBA\u8BA8\u538C\u4ED6\u7684\u62E5\u6324\u4E0E\u538B\u529B\u3002</p><h3 id="\u623F\u4EF7" tabindex="-1"><a class="header-anchor" href="#\u623F\u4EF7" aria-hidden="true">#</a> \u623F\u4EF7</h3><p>\u4E70\u623F\u7684\u4E8B\u5F80\u540E\u7A0D\u7A0D\uFF0C\u54B1\u4EEC\u5148\u8BF4\u79DF\u623F\u7684\u4E8B\u3002\u6CE8\u610F\u554A\uFF0C\u6211\u4E0B\u9762\u8BF4\u7684\u4E0A\u73ED\u65B9\u4FBF\u57FA\u672C\u4E0A\u5C31\u662F\u51FA\u95E8\u540E\u4E00\u4E2A\u5C0F\u65F6\u5185\u5230\u516C\u53F8\u5440\uFF01\u6765\u4E86\u5317\u4EAC\u540E\u5927\u6982\u7387\u4E8B\u8981\u548C\u4EBA\u5408\u79DF\u4E86\uFF0C\u50CF\u4E0A\u9762\u8BF4\u7684\u5728\u817E\u8BAF\u767E\u5EA6\u7B49\u897F\u4E8C\u65D7\u8FD9\u7247\u533A\u57DF\u4E0A\u73ED\u7684\uFF0C\u5927\u591A\u6570\u9009\u62E9\u5728\u56DE\u9F99\u89C2\u8FD9\u5757\u548C\u4EBA\u5408\u79DF\uFF0C\u76F8\u5BF9\u4FBF\u5B9C\u4E14\u6709\u5730\u94C1\u7AD9\u4E0A\u73ED\u6BD4\u8F83\u65B9\u4FBF\u3002\u5728\u56DE\u9F99\u89C2\u8FD9\u5757\u79DF\u4E00\u4E2A 10 \u6765\u5E73\u7684\u5367\u5BA4\u5927\u7EA6 2500 \u5DE6\u53F3\u5427\u3002 \u5728\u4E94\u9053\u53E3\u90A3\u7247\u4E0A\u73ED\u548C\u671B\u4EAC\u90A3\u7247\u4E0A\u73ED\u7684\u5728\u9644\u8FD1\u79DF\u623F\u8981\u66F4\u8D35\u70B9\uFF0C\u79DF\u4E00\u4E2A 10 \u6765\u5E73\u7684\u5367\u5BA4\u5927\u6982\u6BCF\u6708\u8981\u82B1 3000+\u3002\u5F53\u7136\u5728\u671B\u4EAC\u4E0A\u73ED\u53EF\u4EE5\u6CBF\u774014\u53F7\u7EBF\u79DF\u7684\u8FDC\u70B9\uFF0C\u79DF\u91D1\u4F1A\u4FBF\u5B9C\u70B9\uFF0C\u4E0A\u73ED\u76F4\u63A5\u5750\u7740\u5730\u94C1\u8FC7\u6765\u4E5F\u8FD8\u633A\u65B9\u4FBF\u3002\u5728\u4EA6\u5E84\u90A3\u8FB9\u4E0A\u73ED\u7684\u79DF\u623F\u4F1A\u76F8\u5BF9\u4FBF\u5B9C\u70B9\uFF0C2000\u591A\u70B9\u57FA\u672C\u53EF\u4EE5\u3002\u60F3\u8981\u4E00\u4E2A\u4F4F\u4E14\u5728\u4E0A\u8FF0\u516C\u53F8\u4E0A\u73ED\u65B9\u4FBF\uFF0C\u79DF\u4E00\u4E2A30\u5E73\u5DE6\u53F3\u7684\u4E00\u5C45\u5BA4\u57FA\u672C\u6700\u4F4E\u6BCF\u6708\u90FD\u8981 5000 \u4EE5\u4E0A\u4E86\u3002</p><p>\u53E6\u5916\u5927\u5BB6\u8FD8\u53EF\u4EE5\u7785\u7740\u70B9\u516C\u79DF\u623F\uFF0C\u79DF\u91D1\u4F1A\u6BD4\u8F83\u4FBF\u5B9C\uFF0C\u5355\u79DF\u4E00\u95F4 40 \u5E73\u7684\u623F\u5B50\u4E5F\u5C31\u4E0D\u5230 3000\uFF0C\u53EA\u662F\u9650\u5236\u4F1A\u6BD4\u8F83\u591A\u3002\u90E8\u5206\u516C\u53F8\u4F1A\u6709\u516C\u79DF\u623F\u540D\u989D\uFF0C\u6211\u8BB0\u5F97\u5EA6\u5C0F\u6EE1\u5C31\u80FD\u534F\u52A9\u804C\u5DE5\u7533\u8BF7\u516C\u79DF\u623F\u3002\u7533\u8BF7\u4E00\u5C45\u5BA4\u7684\u4F1A\u5BB9\u6613\u70B9\uFF0C\u4E24\u5C45\u5BA4\u7684\u96BE\u7533\u8BF7\u3002</p><p>\u4E0B\u9762\u5C31\u8BF4\u4E70\u623F\u7684\u4E8B\u4E86\uFF0C\u7B97\u4E86\uFF0C\u6211\u5BF9\u5317\u4EAC\u4E70\u623F\u7684\u4E8B\u4E5F\u6CA1\u4EC0\u4E48\u89C1\u89E3\u3002\u8D34\u4E2A\u56FE\u4F60\u4EEC\u81EA\u5DF1\u770B\u5427\uFF0C\u6570\u636E\u4E0D\u4E00\u5B9A\u51C6\uFF0C\u5C31\u611F\u53D7\u4E0B\u623F\u4EF7\u6709\u591A\u9AD8\u5427....\u5BC6\u4E91\u5EF6\u5E86\u4EC0\u4E48\u7684\u5C31\u592A\u8FDC\u4E86\uFF0C\u5F53\u7136\u6709\u5F88\u591A\u4EBA\u5728\u5317\u4EAC\u4E0A\u73ED\u5728\u5929\u6D25\u4E70\u623F\u6216\u8005\u5ECA\u574A\u4E70\u623F\u7684\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-e5bc2cf6-647d-43f9-9352-934440d71b16.png" alt=""></p><h3 id="\u7F8E\u98DF" tabindex="-1"><a class="header-anchor" href="#\u7F8E\u98DF" aria-hidden="true">#</a> \u7F8E\u98DF</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-148db131-6c78-4cbf-86a0-465d88fdd217.png" alt=""></p><p>\u6709\u4E00\u53E5\u8BDD\u53EB\u201C\u4EAC\u57CE\u65E0\u7F8E\u98DF\u201D\u3002\u867D\u7136\u8FD9\u53E5\u8BDD\u6709\u70B9\u6781\u7AEF\u4F46\u662F\u4E5F\u6709\u70B9\u9053\u7406\u7684\u3002\u7F8E\u98DF\u7684\u805A\u96C6\u5730\u5927\u90E8\u5206\u662F\u6CBF\u5C71\u6CBF\u6D77\u6CBF\u6CB3\u6CBF\u6C5F\u7684\u5730\u65B9\uFF0C\u5317\u4EAC\u4E00\u76F4\u4E0D\u662F\u4E00\u4E2A\u7F8E\u98DF\u539F\u6599\u5BCC\u8DB3\u7684\u5730\u65B9\u3002\u5317\u4EAC\u5E38\u8BF4\u7684\u5317\u4EAC\u540D\u83DC\u7279\u70B9\u4E0D\u50CF\u9C81\u83DC\u5DDD\u83DC\u6C5F\u82CF\u83DC\u90A3\u6837\u7279\u70B9\u9C9C\u660E\u3002\u6211\u80FD\u60F3\u5230\u7684\u5317\u4EAC\u7279\u8272\u7684\u996D\u4E5F\u5C31\u662F\u70E4\u9E2D\u3001\u6DAE\u7F8A\u8089\u3001\u7206\u809A\u3001\u7092\u809D\u3001\u4EAC\u9171\u8089\u4E1D\u3001\u70B8\u9171\u9762\uFF0C\u9664\u4E86\u8FD9\u4E9B\u8FD8\u771F\u4E0D\u592A\u597D\u60F3\u4E86\u3002\u5728\u5317\u4EAC\u6709\u4E2A\u597D\u5904\u662F\u4F60\u80FD\u5728\u8FD9\u91CC\u5403\u5230\u5168\u56FD\u5404\u5730\u7684\u7F8E\u98DF\uFF0C\u56E0\u4E3A\u5317\u4EAC\u5168\u56FD\u5404\u5730\u751A\u81F3\u4E16\u754C\u5404\u5730\u7684\u4EBA\u90FD\u6709\uFF0C\u6240\u4EE5\u5404\u7701\u5404\u56FD\u98CE\u5473\u7684\u9910\u5385\u90FD\u4F1A\u6709\uFF0C\u4F46\u662F\u611F\u89C9\u98CE\u5473\u4E0A\u8FD8\u662F\u6839\u636E\u5317\u4EAC\u8FD9\u8FB9\u7684\u53E3\u5473\u505A\u4E86\u4E00\u4E9B\u6539\u53D8\u3002</p><p>\u629B\u5F00\u7F8E\u98DF\u8BF4\u4E00\u4E2A\u73B0\u5B9E\u7684\u95EE\u9898\uFF0C\u5C31\u662F\u5403\u996D\u7684\u82B1\u9500\u3002\u4F60\u5728\u5B66\u6821\u65F6\u4E00\u987F\u996D\u4E5F\u5C31\u662F\u5341\u5757\u5DE6\u53F3\u3002\u6765\u5230\u5317\u4EAC\u540E\u5403\u996D\u7684\u82B1\u9500\u57FA\u672C\u4E0A\u8981\u6BD4\u4F60\u5B66\u6821\u7684\u82B1\u9500\u8D35\u4E00\u500D\u5DE6\u53F3\uFF08\u56E0\u4E3A\u8001\u677F\u7684\u623F\u79DF\u4E5F\u4F1A\u644A\u5230\u996D\u7684\u4EF7\u683C\u4E2D\uFF09\u3002\u5982\u679C\u4F60\u516C\u53F8\u6709\u98DF\u5802\u8FD8\u597D\uFF0C\u8981\u662F\u516C\u53F8\u6CA1\u98DF\u5802\u53EA\u80FD\u5403\u5916\u5356\u7684\u8BDD\uFF0C\u81EA\u5DF1\u7684\u8170\u5305\u548C\u80C3\u90FD\u53D7\u4E0D\u4E86\u3002\u8BF4\u5230\u8FD9\u6211\u89C9\u5F97\u6211\u4EE5\u540E\u665A\u996D\u8FD8\u662F\u81EA\u5DF1\u505A\u5427\u3002</p><h3 id="\u6559\u80B2-\u533B\u7597" tabindex="-1"><a class="header-anchor" href="#\u6559\u80B2-\u533B\u7597" aria-hidden="true">#</a> \u6559\u80B2&amp;\u533B\u7597</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-dc5e04dd-8a49-45b2-b96d-e1a17a2405f2.png" alt=""></p><p>\u5317\u4EAC\u7684\u6559\u80B2\u548C\u533B\u7597\u80AF\u5B9A\u5168\u56FD\u9876\u7EA7\u4E86\u3002\u518D\u5F80\u8BE6\u7EC6\u7684\u4ECB\u7ECD\u6211\u89C9\u5F97\u6211\u5199\u4E0D\u51FA\u4EC0\u4E48\u6709\u6DF1\u5EA6\u7684\u4E1C\u897F\u4E86\uFF0C\u5BF9\u4E8E\u6559\u80B2\u548C\u533B\u7597\u6765\u8BF4\uFF0C\u6211\u89C9\u5F97\u6211\u8FD9\u4E2A\u521A\u6BD5\u4E1A\u4E0D\u5230\u4E00\u5E74\u7684\u4EBA\u80AF\u5B9A\u4E0D\u5982\u5728\u5317\u4EAC\u5F85\u4E86\u591A\u5E74\u7684\u5E76\u4E14\u6709\u5B69\u5B50\u7684\u4E86\u89E3\u7684\u591A\u3002\u6211\u53EA\u662F\u77E5\u9053\u867D\u7136\u5317\u4EAC\u7684\u9AD8\u8003\u4F1A\u6BD4\u5176\u5B83\u7701\u4EFD\u5BB9\u6613\u5F88\u591A\uFF0C\u4F46\u5317\u4EAC\u4E00\u8D2F\u5B9E\u884C\u7684\u7D20\u8D28\u6559\u80B2\u5BF9\u4E8E\u5B69\u5B50\u5BB6\u957F\u6765\u8BF4\u4F1A\u5F88\u7D2F\uFF0C\u4ECA\u5929\u966A\u5B69\u5B50\u5B66\u4E2A\u4EA4\u8C0A\u821E\uFF0C\u660E\u5929\u5B66\u4E2A\u9A6C\u672F\uFF0C\u540E\u5929\u5B66\u6821\u5F00\u4E2A\u5BB6\u957F\u8054\u8C0A\u4F1A\u3002\u5BF9\u4E8E 996 \u6216\u8005 995 \u7684\u7A0B\u5E8F\u5458\u5BB6\u957F\u6765\u8BF4\u771F\u7684\u6709\u70B9\u96BE\u9876\uFF0C\u4E0D\u50CF\u6211\u4EEC\u4E0A\u5B66\u65F6\u5F88\u5C11\u53EB\u5BB6\u957F\u4E86\u3002</p><h3 id="\u5A31\u4E50" tabindex="-1"><a class="header-anchor" href="#\u5A31\u4E50" aria-hidden="true">#</a> \u5A31\u4E50</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-58c387f7-575f-4c2f-9702-e62d7b7575dc.png" 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noreferrer"},v=a("https://mp.weixin.qq.com/s/xlPZfpd89rDq6L-Me80wnw"),u=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png",alt:""})],-1);function k(x,_){const t=c("ExternalLinkIcon");return d(),h("div",null,[n,e("p",null,[s,e("a",o,[l,r(t)]),g]),f,e("blockquote",null,[e("p",null,[m,e("a",j,[v,r(t)])])]),u])}var P=i(b,[["render",k],["__file","beijing.html.vue"]]);export{P as default};
diff --git a/dist/assets/beijing.html.ac5b087b.js b/dist/assets/beijing.html.ac5b087b.js
deleted file mode 100644
index 36166437..00000000
--- a/dist/assets/beijing.html.ac5b087b.js
+++ /dev/null
@@ -1 +0,0 @@
-import{_ as i}from"./plugin-vue_export-helper.21dcd24c.js";import{r as c,o as d,c as h,a as e,b as r,e as p,d as a}from"./app.a0271b9c.js";const b={},n=p('<h1 id="\u5317\u4EAC\u90FD\u6709\u54EA\u4E9B\u725B\u903C\u7684\u4E92\u8054\u7F51\u516C\u53F8" tabindex="-1"><a class="header-anchor" href="#\u5317\u4EAC\u90FD\u6709\u54EA\u4E9B\u725B\u903C\u7684\u4E92\u8054\u7F51\u516C\u53F8" aria-hidden="true">#</a> 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src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-68628d58-37ff-44c8-a3f6-6b9f4978f976.jpg" alt=""></p><p>\u6211\u53D1\u73B0\u5728\u4E92\u8054\u7F51\u516C\u53F8\u5DE5\u4F5C\u7684\u7A0B\u5E8F\u5458\u90FD\u5BF9\u56FD\u4F01\u592E\u4F01\u4EE5\u53CA\u7814\u7A76\u6240\u5341\u5206\u597D\u5947\uFF0C\u4F46\u662F\u56E0\u4E3A\u8FD9\u4E9B\u5355\u4F4D\u7684\u4FE1\u606F\u6BD4\u8F83\u5C01\u95ED\uFF0C\u6240\u4EE5\u5927\u5BB6\u5BF9\u4E8E\u8FD9\u4E9B\u4F01\u4E1A\u7684\u5DE5\u4F5C\u65B9\u5F0F\u4EE5\u53CA\u85AA\u916C\u60C5\u51B5\u90FD\u90FD\u4E0D\u6E05\u695A\u3002\u4E3A\u4E86\u80FD\u7ED9\u5317\u4EAC\u7CFB\u5217\u5F00\u4E2A\u597D\u5934\uFF0C\u7B2C\u4E00\u7BC7\u6587\u7AE0\u6211\u5C31\u4EE5\u6211\u719F\u6089\u7684\u5317\u4EAC\u7684\u56FD\u4F01\u592E\u4F01\u7814\u7A76\u6240\u6765\u7ED9\u5927\u5BB6\u4ECB\u7ECD\u4E86\u3002\u60F3\u63D0\u524D\u58F0\u660E\u4E00\u70B9\uFF0C\u867D\u7136\u6211\u6709\u5F88\u591A\u540C\u5B66\u548C\u670B\u53CB\u5728\u5317\u4EAC\u56FD\u4F01\u592E\u4F01\u4EE5\u53CA\u7814\u7A76\u6240\uFF0C\u4F46\u662F\u540C\u4E00\u4E2A\u516C\u53F8\uFF0C\u4E0D\u540C\u7684\u90E8\u95E8\u6216\u8005\u4E0D\u540C\u7684\u7EC4\u5DEE\u522B\u90FD\u592A\u5927\u4E86\u3002\u5C24\u5176\u662F\u7814\u7A76\u6240\uFF0C\u6BCF\u4E2A\u7CFB\u5217\u90FD\u6709\u6570\u91CF\u5E9E\u5927\u7684\u4E0B\u5C5E\u7814\u7A76\u6240\uFF0C\u5E76\u4E14\u4E0B\u5C5E\u7684\u7814\u7A76\u6240\u72EC\u7ACB\u6027\u90FD\u7279\u522B\u9AD8\uFF0C\u6240\u4EE5\u98CE\u683C\u5DEE\u522B\u5F88\u5927\u3002\u6211\u53EA\u80FD\u628A\u6211\u89C1\u5230\u7684\u60C5\u51B5\u7ED9\u5927\u5BB6\u505A\u4E00\u4E2A\u4ECB\u7ECD\uFF0C\u5177\u4F53\u53BB\u5230\u54EA\u4E2A\u7814\u7A76\u6240\u54EA\u4E2A\u56E2\u961F\u8FD8\u5F97\u4F60\u4EEC\u81EA\u5DF1\u53BB\u8BE6\u7EC6\u6253\u542C\u3002\u53EA\u80FD\u8BF4\u6211\u7684\u4ECB\u7ECD\u76F8\u5BF9\u4E8E\u66F4\u63A5\u8FD1\u4E00\u4E9B\u771F\u5B9E\u3002\u5982\u679C\u5927\u5BB6\u53D1\u73B0\u54EA\u91CC\u6709\u8BEF\uFF0C\u6B22\u8FCE\u5927\u5BB6\u6307\u51FA\u3002</p><p>\u4E0B\u9762\u8FD8\u662F\u5206\u5F00\u6765\u4ECB\u7ECD\uFF1A</p><h2 id="\u56FD\u4F01-\u592E\u4F01" tabindex="-1"><a class="header-anchor" href="#\u56FD\u4F01-\u592E\u4F01" aria-hidden="true">#</a> 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id="\u94F6\u884C\u8F6F\u4EF6\u5F00\u53D1\u4E2D\u5FC3" tabindex="-1"><a class="header-anchor" href="#\u94F6\u884C\u8F6F\u4EF6\u5F00\u53D1\u4E2D\u5FC3" aria-hidden="true">#</a> 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\u8BF4\u7684\u5DE5\u8D44\u53EA\u80FD\u53C2\u8003\uFF0C\u5DE5\u8D44\u8FD8\u662F\u4EE5\u5B9E\u9645\u53D1\u653E\u4E3A\u51C6\u3002\u5982\u679C\u60F3\u77E5\u9053\u5177\u4F53\u5DE5\u8D44\u4F60\u5F97\u79C1\u4E0B\u53BB\u95EE\u548C\u4F60\u5173\u7CFB\u597D\u7684\u5B66\u957F\u5B66\u59D0\uFF0C\u6216\u8005\u53EA\u80FD\u7B49\u5DE5\u8D44\u53D1\u4E0B\u6765\u4E86\u624D\u80FD\u77E5\u9053\u3002\u53E6\u5916\u94F6\u884C\u8F6F\u4EF6\u5F00\u53D1\u4E2D\u5FC3\u7684\u7A33\u5B9A\u4E5F\u53EA\u662F\u8BF4\u8F7B\u6613\u4E0D\u4F1A\u5F00\u9664\u4F60\uFF0C\u4F46\u662F\u5FD9\u4E0D\u5FD9\u5C31\u8981\u770B\u4F60\u8FD0\u6C14\u4E86\u3002\u94F6\u884C\u8F6F\u4EF6\u5F00\u53D1\u4E2D\u5FC3\u6709\u7684\u7EC4\u5FD9\u8D77\u6765\u5B8C\u5168\u4E0D\u865A PDD\u3002</p><h4 id="\u5DE5\u5546\u94F6\u884C\u8F6F\u4EF6\u5F00\u53D1\u4E2D\u5FC3" tabindex="-1"><a class="header-anchor" href="#\u5DE5\u5546\u94F6\u884C\u8F6F\u4EF6\u5F00\u53D1\u4E2D\u5FC3" aria-hidden="true">#</a> \u5DE5\u5546\u94F6\u884C\u8F6F\u4EF6\u5F00\u53D1\u4E2D\u5FC3</h4><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-b8653934-cc7f-4703-81f2-f654f7d4440a.png" alt=""></p><p>\u548C\u540C\u884C\u76F8\u6BD4\uFF0C\u5DE5\u5546\u94F6\u884C\u7684\u8F6F\u4EF6\u5F00\u53D1\u4E2D\u5FC3\u7B97\u6280\u672F\u6700\u597D\u7684\u4E86\u3002\u5DE5\u884C\u559C\u6B22\u62DB\u5E94\u5C4A\u751F\uFF0C\u793E\u62DB\u8FDB\u6765\u7684\u6BD4\u8F83\u5C11\u3002\u521A\u8FDB\u6765\u7684\u5E94\u5C4A\u751F\u804C\u7EA7\u662F\u52A9\u7406\u7ECF\u7406\uFF0C\u7A0E\u524D\u5E74\u85AA\u5DEE\u4E0D\u591A\u662F20\u4E07\u5DE6\u53F3\uFF08\u5230\u624B15-16\u4E07\u5427\uFF0C\u52A0\u4E0A\u5E74\u7EC8\u5956\u548C\u8282\u5047\u65E5\u8865\u8D34\uFF09\u3002\u5DE5\u8D44\u53D1\u653E\u65B9\u5F0F\u7A0D\u5FAE\u6709\u70B9\u5947\u602A\uFF0C\u5C31\u662F\u6BCF\u6708\u53D1\u516B\u4E5D\u5343\uFF0C\u7136\u540E\u7559\u4E00\u90E8\u5206\u5E74\u5E95\u4E00\u5E76\u53D1\u653E\u3002\u6BCF\u6708\u4F1A\u6709\u996D\u8865\uFF0C\u8FC7\u8282\u4E5F\u4F1A\u6709\u8282\u5047\u65E5\u8865\u8D34\uFF08\u653E\u4E09\u5929\u7684\u8282\u65E5\u5047\u671F\u7ED9 1000\uFF0C\u56FD\u5E86\u7ED9 2000\uFF0C\u8FC7\u5E74 4000\uFF09\u3002\u8FD9\u4E2A\u804C\u7EA7\u7684\u5DE5\u8D44\u5BF9\u4E8E\u5728\u5317\u4EAC\u5DE5\u4F5C\u6765\u8BF4\u8FD8\u662F\u6709\u70B9\u96BE\u9876\u7684\uFF0C\u6BD5\u7ADF\u5149\u8DDF\u4EBA\u5408\u79DF\u6BCF\u6708\u5C31\u8981\u753B\u6389\u4E24\u5343\u591A\u4E86\u3002\u5982\u679C\u4F60\u662F\u672C\u79D1\u6BD5\u4E1A\u8FDB\u5165\u5DE5\u884C\uFF0C\u4ECE\u52A9\u7406\u7ECF\u7406\u5347\u5230\u7ECF\u7406\u4E00\u9700\u8981\u4E24\u5E74\u65F6\u95F4\uFF0C\u7855\u58EB\u53EA\u9700\u8981\u4E00\u5E74\uFF0C\u8FD9\u4E2A\u804C\u7EA7\u57FA\u672C\u4E0A\u5168\u90FD\u80FD\u6309\u65F6\u8FBE\u5230\uFF0C\u4E0D\u8FC7\u5DE5\u8D44\u53D8\u5316\u4E0D\u592A\u5927\u3002\u4ECE\u7ECF\u7406\u4E00\u5347\u5230\u7ECF\u7406\u4E8C\u5927\u7EA6\u8981\u4E00\u5230\u4E24\u5E74\u7684\u65F6\u95F4\uFF0C\u8FD9\u5C31\u770B\u4F60\u80FD\u529B\u4E86\uFF0C\u7ECF\u7406\u4E8C\u4EE5\u540E\u5DE5\u8D44\u5C31\u76F8\u5BF9\u591A\u4E00\u4E9B\u4E86\uFF0C\u7ECF\u7406\u4E8C\u7EE9\u6548\u4E0D\u592A\u597D\u7684\u8BDD\u6BCF\u5E74\u5230\u624B\u80FD\u62FF 22 \u4E07\u5DE6\u53F3\uFF0C\u5982\u679C\u7EE9\u6548\u597D\uFF0C\u53EF\u80FD\u80FD\u62FF\u5230 29 \u4E07\u5DE6\u53F3\u3002\u7ECF\u7406\u4E8C\u5347\u7ECF\u7406\u4E09\u5C31\u5B8C\u5168\u770B\u4F60\u81EA\u5DF1\u80FD\u529B\u4E86\uFF0C\u5230\u7ECF\u7406\u4E09\u4EE5\u540E\u6BCF\u5E74\u5230\u624B\u90FD\u80FD 35 \u4E07\u5DE6\u53F3\uFF0C\u6536\u5165\u5C31\u5F88\u53EF\u89C2\u4E86\u3002\u53E6\u5916\u5728\u5DE5\u884C\u53D1\u4E13\u5229\u4EC0\u4E48\u7684\u4E5F\u6709\u4E9B\u5956\u91D1\uFF0C\u4E00\u4E2A\u4E13\u5229\u8C8C\u4F3C\u662F\u5956\u52B1 5000.</p><p>\u5DE5\u884C\u7684\u603B\u884C\u662F\u5728\u73E0\u6D77\u3002\u5DE5\u884C\u5728\u897F\u5B89\u3001\u676D\u5DDE\u7B49\u5730\u4E5F\u8BBE\u7ACB\u4E86\u7814\u53D1\u4E2D\u5FC3\uFF0C\u90FD\u662F\u5C5E\u4E8E\u603B\u884C\u3002\u76EE\u524D\u5317\u4EAC\u8FD9\u8FB9\u4E5F\u4E00\u76F4\u5728\u52A8\u5458\u5458\u5DE5\u53BB\u897F\u5B89\uFF0C\u85AA\u8D44\u548C\u5317\u4EAC\u5DEE\u4E0D\u592A\u591A\u3002\u542C\u8BF4\u897F\u5B89\u90A3\u8FB9\u7684\u5DE5\u884C\u52A0\u73ED\u6BD4\u8F83\u4E25\u91CD\u3002\u5317\u4EAC\u8FD9\u8FB9\u603B\u4F53\u8FD8\u597D\uFF0C\u5377\u4E0D\u5377\u770B\u4F60\u7EC4\u957F\u4E86\uFF0C\u4E0D\u8FC7\u4F60\u4E5F\u53EF\u4EE5\u4E0D\u7529\u4F60\u9886\u5BFC\uFF0C\u4ED6\u4EEC\u662F\u5F88\u96BE\u5F00\u6389\u4F60\u7684\uFF0C\u4ED6\u4EEC\u80FD\u7684\u53EA\u662F\u7EE9\u6548\u7ED9\u4F60\u6253\u4F4E\u70B9\uFF0C\u4F60\u5DE5\u8D44\u5C11\u70B9\u3002</p><h4 id="\u519C\u4E1A\u94F6\u884C\u8F6F\u4EF6\u5F00\u53D1\u4E2D\u5FC3" tabindex="-1"><a class="header-anchor" href="#\u519C\u4E1A\u94F6\u884C\u8F6F\u4EF6\u5F00\u53D1\u4E2D\u5FC3" aria-hidden="true">#</a> \u519C\u4E1A\u94F6\u884C\u8F6F\u4EF6\u5F00\u53D1\u4E2D\u5FC3</h4><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-fb046afd-1116-4619-a5ae-d9756863ca19.png" alt=""></p><p>\u611F\u89C9\u519C\u4E1A\u94F6\u884C\u7684\u8F6F\u4EF6\u5F00\u53D1\u4E2D\u5FC3\u6280\u672F\u6BD4\u5DE5\u884C\u5DEE\u4E00\u70B9\uFF0C\u4E0D\u8FC7\u5DE5\u8D44\u6BD4\u5DE5\u884C\u591A\u4E00\u4E9B\uFF0C\u521A\u6BD5\u4E1A\u7684\u5E94\u5C4A\u751F\u7A0E\u524D\u80FD\u5230\u7A0E\u524D25\u4E07-32\u4E07\uFF08\u8FD9\u662Fhr\u8BF4\u7684\u554A\uFF0C\u6211\u4E86\u89E3\u5230\u7684\u897F\u5B89\u6BCF\u6708\u7A0E\u540E\u5230\u624B\u662F 1\u4E072\uFF0C\u52A0\u4E0A\u5E74\u7EC8\u5956\u7A0E\u524D\u80FD\u7B97 20 \u4E07\u7684\u5E74\u5305\uFF0C\u5317\u4EAC\u6BD4\u897F\u5B89\u7A0D\u5FAE\u591A\u4E00\u70B9\u70B9\uFF0C\u4F46\u662F\u591A\u4E0D\u4E86\u592A\u591A\uFF09\u3002\u519C\u884C\u8F6F\u4EF6\u5F00\u53D1\u4E2D\u5FC3\u6709\u4E2A\u5927\u95EE\u9898\u5C31\u662F\u5DE5\u8D44\u5206\u914D\u5F88\u5E73\u5747\uFF0C\u4F46\u662F\u5DE5\u4F5C\u91CF\u5206\u5E03\u4E0D\u5747\uFF0C\u6709\u7684\u7EC4\u5341\u5206\u517B\u751F\uFF0C\u6709\u7684\u7EC4\u5FD9\u7684\u53D7\u4E0D\u4E86\uFF08\u8D8A\u63A5\u8FD1\u5BA2\u6237\u7528\u7684\u4EA7\u54C1\u7EBF\u8D8A\u7D2F\uFF09\u3002\u6211\u7684\u4E00\u4E2A\u5B66\u957F\u5929\u5929\u65E9\u65E9\u5C31\u4E0B\u73ED\u4E86\uFF0C\u53E6\u5916\u4E00\u4E2A\u540C\u5B66\u5468\u672B\u8DDF\u6211\u5403\u4E2A\u996D\u90FD\u6025\u5306\u5306\u7684\uFF0C\u4E3A\u4E86\u6295\u4EA7\u8981\u52A0\u73ED\u5230\u51CC\u6668\u3002\u76EE\u524D\u519C\u884C\u5185\u90E8\u7684\u6028\u6C14\u6BD4\u8F83\u5927\uFF0C\u8FD9\u70B9\u5927\u5BB6\u5728\u8109\u8109\u4E0A\u4E5F\u80FD\u770B\u51FA\u6765\u3002\u519C\u884C\u60F3\u8981\u5347\u804C\u8FD8\u8981\u53BB\u8003\u8F6F\u8003\u3002</p><h4 id="\u4E2D\u56FD\u94F6\u884C\u8F6F\u4EF6\u5F00\u53D1\u4E2D\u5FC3" tabindex="-1"><a class="header-anchor" href="#\u4E2D\u56FD\u94F6\u884C\u8F6F\u4EF6\u5F00\u53D1\u4E2D\u5FC3" aria-hidden="true">#</a> \u4E2D\u56FD\u94F6\u884C\u8F6F\u4EF6\u5F00\u53D1\u4E2D\u5FC3</h4><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-e3490a86-2b92-4a47-8c68-8e2281c2cb32.png" alt=""></p><p>\u4E2D\u56FD\u94F6\u884C\u8F6F\u4EF6\u5F00\u53D1\u4E2D\u5FC3\u7B97\u662F\u7ED9\u94B1\u6700\u5C11\u7684\u4E86\uFF0C\u5E74\u530515\u4E07\u5DE6\u53F3\u3002\u8FD9\u94B1\u5728\u5317\u4EAC\u786E\u5B9E\u592A\u5C11\u4E86\u3002\u4E0D\u8FC7\u5DE5\u4F5C\u662F\u76EE\u524D\u51E0\u4E2A\u94F6\u884C\u8F6F\u5F00\u91CC\u6700\u8F7B\u677E\u7684\uFF0C\u5BB6\u91CC\u4E0D\u600E\u4E48\u7F3A\u94B1\uFF0C\u53EA\u60F3\u627E\u4E2A\u8F7B\u677E\u7A33\u5B9A\u7684\u53EF\u4EE5\u9009\u3002</p><h4 id="\u90AE\u653F\u50A8\u84C4\u94F6\u884C\u8F6F\u4EF6\u7814\u53D1\u4E2D\u5FC3" tabindex="-1"><a class="header-anchor" href="#\u90AE\u653F\u50A8\u84C4\u94F6\u884C\u8F6F\u4EF6\u7814\u53D1\u4E2D\u5FC3" aria-hidden="true">#</a> \u90AE\u653F\u50A8\u84C4\u94F6\u884C\u8F6F\u4EF6\u7814\u53D1\u4E2D\u5FC3</h4><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-4e15e06c-f808-4d79-954f-3fbca94ce6e6.png" alt=""></p><p>\u7B2C\u4E00\u5E74\u5305\u542B\u8BD5\u7528\u671F\uFF0C\u5E74\u85AA\u7A0E\u524D\u603B\u5305 26w, \u7B2C\u4E8C\u5E74\u5E74\u85AA\u7A0E\u524D\u603B\u5305 31w\u3002\u52A0\u4E0D\u52A0\u73ED\u770B\u4F60\u8FD0\u6C14\u4E86\uFF0C\u8FD0\u6C14\u597D\u88AB\u5206\u5230\u597D\u7684\u7EC4\u4E0D\u600E\u4E48\u52A0\u73ED\uFF0C\u8FD0\u6C14\u4E0D\u597D\u5C31\u5F88\u60E8\u4E86\u3002\u5728\u5317\u4EAC\u5DE5\u4F5C\u7684\u8BDD\u4E0D\u4F1A\u88AB\u5916\u8C03\uFF0C\u4F46\u662F\u5728\u897F\u5B89\u7B49\u5730\u5DE5\u4F5C\u7684\u8BB8\u591A\u4EBA\u4F1A\u88AB\u5916\u8C03\u3002</p><h3 id="\u5238\u5546" tabindex="-1"><a class="header-anchor" href="#\u5238\u5546" aria-hidden="true">#</a> \u5238\u5546</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-58cd1949-b992-4550-b2e1-b24c519c0a78.png" alt=""></p><p>\u66FE\u7ECF\u519C\u884C\u8F6F\u5F00\u7684\u4E00\u4F4D\u9886\u5BFC\u6765\u6211\u4EEC\u5B66\u6821\u6821\u62DB\u5BA3\u8BB2\u65F6\u5C31\u8BF4\u56E0\u4E3A\u94F6\u884C\u7684\u5DE5\u8D44\u6709\u9650\u5236\uFF0C\u6DA8\u85AA\u6BD4\u8F83\u6162\u3002\u6240\u4EE5\u5F88\u591A\u94F6\u884C\u8F6F\u5F00\u7684\u804C\u5DE5\u5E72\u51E0\u5E74\u540E\u5C31\u4F1A\u8DD1\u5230\u5238\u5546\u53BB\u6323\u94B1\u3002\u90A3\u65F6\u6211\u624D\u77E5\u9053\u5238\u5546\u5C45\u7136\u8FD8\u62DB\u4E0D\u5C11\u7A0B\u5E8F\u5458\u3002\u540E\u6765\u6211\u53D1\u73B0\u4E2D\u4FE1\u5EFA\u6295\u8BC1\u5238\u662F\u771F\u4E0D\u9519\uFF0C\u5317\u4EAC\u8FD9\u8FB9\u6821\u62DB\u751F\u8FDB\u6765\u6708\u85AA 18k \uFF0C\u5E74\u7EC8\u5956 6 \u4E2A\u6708\uFF0C\u867D\u7136\u85AA\u8D44\u8FD8\u662F\u4E0D\u53CA\u4E92\u8054\u7F51\u516C\u53F8\uFF0C\u4F46\u662F\u6DA8\u85AA\u901F\u5EA6\u76F8\u6BD4\u4E8E\u5176\u5B83\u56FD\u4F01\u592E\u4F01\u8FD8\u662F\u5FEB\u5F88\u591A\u7684\u3002\u53E6\u5916\u53EA\u6709\u80A1\u7968\u5F00\u5E02\u7684\u65E5\u5B50\u7528\u4E0A\u73ED\uFF0C\u52A0\u73ED\u5F88\u5C11\u3002\u4E0D\u8FC7\u5BF9\u4E8E\u5B66\u5386\u7684\u8981\u6C42\u6BD4\u8F83\u9AD8\uFF0C\u5FC5\u987B\u662F985\u7855\u58EB\uFF0C\u5E76\u4E14\u8FD8\u5361\u672C\u79D1\u3002</p><p>\u5BF9\u4E8E\u5176\u5B83\u5238\u5546\u7684\u60C5\u51B5\u6211\u77E5\u9053\u7684\u5C31\u4E0D\u591A\u4E86\uFF0C\u8FD9\u91CC\u7ED9\u5927\u5BB6\u63D0\u4F9B\u4E00\u4E2A\u627E\u5DE5\u4F5C\u7684\u601D\u8DEF\uFF0C\u5927\u5BB6\u53EF\u4EE5\u591A\u53BB\u4E86\u89E3\u4E0B\u3002</p><h3 id="\u8FD0\u8425\u5546" tabindex="-1"><a class="header-anchor" href="#\u8FD0\u8425\u5546" aria-hidden="true">#</a> \u8FD0\u8425\u5546</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-1b67f498-dc2e-401f-b942-59455b941bd9.png" alt=""></p><p>\u8FD9\u91CC\u8BF4\u7684\u8FD0\u8425\u5546\u8BF4\u7684\u662F\u79FB\u52A8\u8054\u901A\u8FD8\u6709\u7535\u4FE1\u7684\u7814\u7A76\u9662\u3002\u79FB\u52A8\u7684\u5DE5\u8D44\u53D1\u653E\u98CE\u683C\u548C\u5DE5\u884C\u6709\u5F02\u66F2\u540C\u5DE5\u4E4B\u5999\uFF0C\u6BCF\u4E2A\u6708\u53D1\u7684\u5DE5\u8D44\u5F88\u5C11\uFF0C\u5230\u5E74\u7EC8\u4F1A\u4E00\u8D77\u518D\u53D1\u4E00\u4E9B\u3002\u5E94\u5C4A\u751F\u5E74\u85AA\u5927\u6982 20w 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\u7814\u7A76\u6240</h2><p>\u5317\u4EAC\u6709\u7740\u6570\u91CF\u5E9E\u5927\u7684\u7814\u7A76\u6240\uFF0C\u6BD4\u5982\u822A\u5929\u79D1\u6280\u7CFB\u5217\u3001\u822A\u7A7A\u5DE5\u4E1A\u7CFB\u5217\u3001\u4E2D\u8239\u8236\u7CFB\u5217\u3001\u4E2D\u79D1\u9662\u7CFB\u5217\u3001\u4E2D\u7535\u79D1\u7CFB\u5217\u3001\u519B\u4E8B\u79D1\u5B66\u9662\u4E0B\u5C5E\u7CFB\u5217\u3001\u5DE5\u4FE1\u90E8\u4E0B\u5C5E\u7814\u7A76\u9662\u3001\u4E2D\u56FD\u5175\u5668\u7B49\u7B49\u3002\u4E0D\u5F97\u4E0D\u8BF4\u8BA1\u7B97\u673A\u76F8\u5173\u4E13\u4E1A\u771F\u7684\u662F\u4E07\u91D1\u6CB9\uFF0C\u56E0\u4E3A\u4E0A\u8FF0\u7814\u7A76\u6240\uFF0C\u4E0D\u7BA1\u4ED6\u4EEC\u4E3B\u8425\u4E1A\u52A1\u662F\u5565\uFF0C\u4ED6\u4EEC\u5168\u90FD\u62DB\u8BA1\u7B97\u673A\u76F8\u5173\u4E13\u4E1A\u7684\u6BD5\u4E1A\u751F\uFF0C\u5E76\u4E14\u62DB\u7684\u8FD8\u4E0D\u5C11\u3002</p><p>\u8FD1\u51E0\u5E74\u60F3\u6210\u4E3A\u8FD9\u4E9B\u7814\u7A76\u6240\u7684\u6B63\u5F0F\u804C\u5DE5\u90FD\u9700\u8981\u662F\u7855\u58EB\u4EE5\u4E0A\u4E86\uFF0C\u7B7E\u7684\u672C\u79D1\u751F\u57FA\u672C\u90FD\u662F\u52B3\u52A1\u6D3E\u9063\u3002\u6237\u53E3\u7684\u4E8B\u653E\u5728\u751F\u6D3B\u91CC\u7EDF\u4E00\u8BF4\u3002</p><p>\u53EF\u80FD\u5BB6\u91CC\u7684\u957F\u8F88\u542C\u5230\u4F60\u53BB\u4E86\u7814\u7A76\u6240\u4F1A\u89C9\u5F97\u5F88\u6709\u9762\u5B50\u3002\u4F46\u662F\u5355\u8BBA\u8F6F\u4EF6\u6280\u672F\u6765\u8BF4\uFF0C\u76EE\u524D\u7814\u7A76\u6240\u662F\u843D\u540E\u4E8E\u4E92\u8054\u7F51\u516C\u53F8\u7684\uFF0C\u5E76\u4E14\u5DEE\u8DDD\u8FD8\u4E0D\u7B97\u5C0F\u3002\u7814\u7A76\u6240\u548C\u4E92\u8054\u7F51\u516C\u53F8\u7684\u529E\u4E8B\u98CE\u683C\u4E0D\u592A\u4E00\u6837\uFF0C\u4E92\u8054\u7F51\u516C\u53F8\u4F1A\u628A\u5C97\u4F4D\u5212\u5206\u7684\u5F88\u7EC6\u81F4\u751A\u81F3\u6709\u7684\u4E92\u8054\u7F51\u516C\u53F8\u4F1A\u65E0\u9650\u7684\u7EC6\u5206\u4E00\u4E2A\u5C97\u4F4D\uFF08\u8FD9\u70B9\u662F\u6211\u89C9\u5F97\u4E0D\u592A\u597D\u7684\u5730\u65B9\uFF0C\u56E0\u4E3A\u5212\u5206\u7684\u592A\u7EC6\u4E86\uFF0C\u4EE5\u540E\u8DF3\u69FD\u4F1A\u5B58\u5728\u95EE\u9898\uFF09\uFF0C\u4F46\u662F\u7814\u7A76\u6240\u7684\u5C97\u4F4D\u53C8\u5212\u5206\u7684\u592A\u7C97\u7CD9\u4E86\uFF08\u4ECE\u8BA2\u9700\u6C42\u3001\u5199\u5F00\u53D1\u6587\u6863\u3001\u4EE3\u7801\u5F00\u53D1\u3001\u6D4B\u8BD5\u3001\u5230\u548C\u5BA2\u6237\u626F\u76AE\u8FD9\u4E9B\u6D41\u7A0B\u5168\u7684\u4F60\u6765\u641E\uFF09\u3002\u53E6\u5916\u56E0\u4E3A\u7814\u7A76\u6240\u7684\u5927\u90E8\u5206\u9886\u5BFC\u8F6F\u4EF6\u65B9\u9762\u6280\u672F\u6CA1\u6709\u4E92\u8054\u7F51\u90A3\u4E48\u4E13\uFF0C\u6240\u4EE5\u5BF9\u5DE5\u4F5C\u91CF\u7684\u8BC4\u4F30\u4E0D\u662F\u592A\u51C6\uFF0C\u6709\u65F6\u5019\u5B89\u6392\u8D77\u6D3B\u6765\u5C31\u6BD4\u8F83\u79BB\u8C31\u3002\u662F\u5426\u6765\u7814\u7A76\u6240\u8981\u60F3\u60F3\u660E\u767D\u4EE5\u4E0B\u51E0\u4E2A\u95EE\u9898\uFF1A\uFF081\uFF09\u4F60\u5BB6\u5EAD\u7684\u7ECF\u6D4E\u60C5\u51B5\uFF0C\u81F3\u5C11\u5317\u4EAC\u4E70\u623F\u9996\u4ED8\u5BB6\u91CC\u80FD\u638F\u51FA\u6765\u3002\uFF082\uFF09\u4F60\u7684\u5174\u8DA3\uFF08\u5982\u679C\u53EA\u60F3\u5B89\u5B89\u9759\u9759\u7684\u5199\u4EE3\u7801\uFF0C\u7814\u7A76\u6240\u4E0D\u592A\u5408\u9002\uFF09\u3002\uFF083\uFF09\u9762\u8BD5\u901A\u8FC7\u540E\u4F60\u8981\u5145\u5206\u7684\u4E86\u89E3\u4F60\u6240\u5728\u7684\u56E2\u961F\u60C5\u51B5\uFF0C\u540C\u4E00\u4E2A\u7814\u7A76\u6240\uFF0C\u4E0D\u540C\u7684\u56E2\u961F\u7684\u5DEE\u522B\u90A3\u53EF\u5927\u4E86\u53BB\u4E86\u3002</p><p>\u603B\u4F53\u6765\u8BF4\uFF0C\u4E2A\u4EBA\u611F\u89C9\u5982\u679C\u4F60\u5728\u4E00\u4E2A\u4E8C\u7EBF\u57CE\u5E02\u7684\u7814\u7A76\u6240\u5DE5\u4F5C\u4F1A\u6BD4\u5728\u4E00\u7EBF\u57CE\u5E02\u7814\u7A76\u6240\u5DE5\u4F5C\u8212\u670D\u3002\u5728\u4E00\u7EBF\u57CE\u5E02\u53BB\u4E92\u8054\u7F51\u516C\u53F8\u5E72\u51E0\u5E74\u6512\u70B9\u94B1\u64A4\u4E00\u4E2A\u4E8C\u7EBF\u57CE\u5E02\u538B\u529B\u6CA1\u90A3\u4E48\u5927\u3002\u5728\u5317\u4EAC\u7684\u7814\u7A76\u6240\u5DE5\u4F5C\u5317\u4EAC\u6237\u53E3\u662F\u62FF\u4E86\uFF0C\u4F46\u662F\u5E72\u51E0\u5E74\u6839\u672C\u6512\u4E0D\u4E0B\u591A\u5C11\u94B1\uFF0C\u4E00\u7EBF\u57CE\u5E02\u7814\u7A76\u6240\u5206\u623F\u8FD9\u4E8B\u5C31\u4E0D\u7528\u505A\u68A6\u4E86\uFF0C\u5145\u5176\u91CF\u4F1A\u7ED9\u4F60\u63D0\u4F9B\u4E00\u4E2A\u5BBF\u820D\uFF0C\u8FD9\u79CD\u5BBF\u820D\u4E5F\u5C31\u662F\u6BD5\u4E1A\u4E09\u5230\u4E94\u5E74\u5185\u53EF\u4EE5\u4F4F\uFF0C\u4EE5\u540E\u5C31\u4E0D\u80FD\u4F4F\u4E86\u3002\u76F8\u6BD4\u4E8E\u4E8C\u7EBF\u57CE\u5E02\u7684\u7814\u7A76\u6240\uFF0C\u4E00\u7EBF\u57CE\u5E02\u7814\u7A76\u6240\u7684\u5DE5\u8D44\u6BCF\u6708\u591A\u4E2A\u4E24\u4E09\u5343\uFF0C\u4F46\u662F\u623F\u4EF7\u662F\u4E8C\u7EBF\u57CE\u5E02\u7684\u4E09\u5230\u4E94\u500D\uFF0C\u751F\u6D3B\u5E78\u798F\u611F\u4F1A\u5927\u6253\u6298\u6263\u3002</p><h3 id="\u822A\u5929\u79D1\u6280-\u822A\u7A7A\u5DE5\u4E1A" tabindex="-1"><a class="header-anchor" href="#\u822A\u5929\u79D1\u6280-\u822A\u7A7A\u5DE5\u4E1A" aria-hidden="true">#</a> \u822A\u5929\u79D1\u6280&amp;\u822A\u7A7A\u5DE5\u4E1A</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-fcff3f6d-6357-48fe-a807-74c225ce0c95.png" alt=""></p><p>\u6211\u6709\u5F88\u591A\u7684\u6821\u53CB\u90FD\u5728\u822A\u7A7A\u822A\u5929\u7CFB\u5217\u7684\u7814\u7A76\u6240\u3002\u7814\u7A76\u6240\u7684\u5177\u4F53\u85AA\u8D44\u90FD\u6BD4\u8F83\u4FDD\u5BC6\uFF0C\u5927\u90E8\u5206\u7814\u7A76\u6240\u5728\u7ED9\u4F60 offer \u7684\u65F6\u5019\u4E0D\u4F1A\u50CF\u4E92\u8054\u7F51\u516C\u53F8\u90A3\u6837\u628A\u85AA\u8D44\u7ED9\u4F60\u8BF4\u7684\u6E05\u6E05\u695A\u695A\u5E76\u4E14\u5199\u5728\u5408\u540C\u4E0A\uFF0C\u800C\u662F\u5927\u6982\u548C\u4F60\u8BF4\u4E2A\u6570\u3002\u800C\u4E14\u4F60\u5165\u804C\u540E\u4E24\u5230\u4E09\u4E2A\u6708\u7684\u85AA\u8D44\u5F80\u5F80\u90FD\u5F88\u5C11\uFF0C\u7B49\u4E09\u56DB\u4E2A\u6708\u4EE5\u540E\u85AA\u8D44\u7A33\u5B9A\u4E86\u4F60\u624D\u80FD\u786E\u5B9A\u4F60\u5F00\u591A\u5C11\u94B1\u3002</p><p>\u822A\u7A7A\u822A\u5929\u76EE\u524D\u6548\u76CA\u6BD4\u8F83\u597D\uFF0C\u7B97\u662F\u7814\u7A76\u6240\u4E2D\u85AA\u8D44\u6BD4\u8F83\u9AD8\u7684\u3002\u53E6\u5916\u98DF\u5802\u548C\u5BBF\u820D\u90FD\u6709\uFF0C\u5982\u679C\u6CA1\u5BBF\u820D\u8FD8\u4F1A\u6709\u79DF\u623F\u8865\u8D34\u3002\u4F46\u662F\u6323\u94B1\u548C\u4E92\u8054\u7F51\u516C\u53F8\u80AF\u5B9A\u6CA1\u6CD5\u6BD4\u3002\u85AA\u8D44\u7684\u8BDD\u521A\u6BD5\u4E1A\u7684\u5B66\u751F\u6BCF\u6708\u5230\u624B\u5927\u6982\u662F\u4E00\u4E07\u51FA\u5934\uFF0C\u5DE5\u8D44\u52A0\u4E0A\u5404\u79CD\u8865\u8D34\u5E74\u85AA\u5DEE\u4E0D\u591A\u7A0E\u524D\u80FD\u523020\u591A\u4E07\u3002\u52A0\u73ED\u6CA1\u6709\u52A0\u73ED\u8D39\uFF0C\u51FA\u5DEE\u4F1A\u6709\u51FA\u5DEE\u8865\u8D34\uFF0C\u6709\u7684\u56E2\u961F\u51FA\u5DEE\u4E00\u5929\u8865300\uFF0C\u6709\u7684\u56E2\u961F\u51FA\u5DEE\u4E00\u5929\u8865400\u3002\u6240\u4EE5\u5982\u679C\u4F60\u4E00\u4E2A\u6708\u90FD\u9A7B\u5728\u5916\u9762\u7684\u8BDD\uFF0C\u4E00\u4E2A\u6708\u5DE5\u8D44\u5230\u624B\u4E5F\u4E24\u4E07\u591A\u5462\u3002\u4F46\u662F\u4E00\u5E74\u6709\u4E2A\u4E00\u4E24\u6708\u51FA\u5DEE\u8FD8\u884C\uFF0C\u6709\u7684\u9879\u76EE\u7EC4\u4E00\u5E74\u6709\u4E09\u5206\u4E4B\u4E8C\u65F6\u95F4\u5728\u5916\u9762\u51FA\u5DEE\uFF0C\u4F60\u4F1A\u6000\u7591\u4EBA\u751F\u7684\u3002\u5176\u5B9E\u521A\u6BD5\u4E1A\u5934\u4E24\u5E74\u822A\u7A7A\u822A\u5929\u7684\u85AA\u8D44\u548C\u4E92\u8054\u7F51\u516C\u53F8\u5DEE\u8DDD\u4E0D\u5927\uFF0C\u4E0D\u8FC7\u5728\u4E24\u4E09\u5E74\u540E\u85AA\u8D44\u6C34\u5E73\u5C31\u4F1A\u9010\u6E10\u62C9\u5F00\uFF0C\u7814\u7A76\u6240\u85AA\u8D44\u6DA8\u7684\u90FD\u6162\u3002</p><p>\u53E6\u5916\u822A\u7A7A\u822A\u5929\u7684\u7814\u7A76\u6240\u662F\u5F88\u5FD9\u7684\uFF0C\u6240\u4EE5\u522B\u60F3\u7740\u8FDB\u6765\u8F7B\u677E\u3002\u7814\u7A76\u6240\u7684\u5FD9\u6CD5\u548C\u4E92\u8054\u7F51\u516C\u53F8\u4E0D\u662F\u4E00\u79CD\u5FD9\u6CD5\uFF0C\u6709\u7684\u4EBA\u5728\u5DE5\u4F5C\u5F3A\u5EA6\u5927\u7684\u4E92\u8054\u7F51\u516C\u53F8\u5F85\u8FC7\u7684\u53EF\u80FD\u89C9\u5F97\u81EA\u5DF1 996 \u548C 007 \u90FD\u80FD\u6297\uFF0C\u6765\u4E2A\u7814\u7A76\u6240\u8FD8\u6015\u5565\uFF1F\u6211\u662F\u60F3\u8BF4\u4F60\u53EF\u80FD\u60F3\u7684\u6709\u70B9\u7B80\u5355\u4E86\uFF0C\u5728\u7814\u7A76\u6240\u5199\u4EE3\u7801\u53EA\u662F\u5DE5\u4F5C\u7684\u4E00\u5C0F\u90E8\u5206\uFF0C\u8BA9\u4F60\u70E6\u5FC3\u7684\u4E8B\u591A\u7740\u5462\u3002\u53EA\u662F\u8BF4\u4F60\u5982\u679C\u4E0D\u628A\u9886\u5BFC\u6253\u4E86\u7684\u8BDD\uFF0C\u4ED6\u4E0D\u592A\u5BB9\u6613\u628A\u4F60\u5F00\u6389\u3002\u53E6\u5916\u7814\u7A76\u6240\u6709\u4E2A\u597D\u5904\u662F\u6BD4\u8F83\u652F\u6301\u5728\u804C\u8BFB\u535A\uFF0C\u5982\u679C\u4F60\u7684\u7EC4\u4E0D\u662F\u592A\u5FD9\uFF0C\u63D0\u5347\u4E0B\u5B66\u5386\u662F\u4E2A\u4E0D\u9519\u7684\u9009\u62E9\u3002</p><h3 id="\u5DE5\u4FE1\u90E8\u4E0B\u5C5E\u7814\u7A76\u9662" tabindex="-1"><a class="header-anchor" href="#\u5DE5\u4FE1\u90E8\u4E0B\u5C5E\u7814\u7A76\u9662" aria-hidden="true">#</a> \u5DE5\u4FE1\u90E8\u4E0B\u5C5E\u7814\u7A76\u9662</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-0f3b7783-4567-4f07-974d-a31b8d9ec939.png" alt=""></p><p>\u5DE5\u4FE1\u90E8\u4E0B\u5C5E\u7684\u7814\u7A76\u9662\u6574\u4F53\u4E0A\u90FD\u4E0D\u9519\uFF0C\u5C31\u6BD4\u5982\u4FE1\u901A\u9662\uFF08\u4E2D\u56FD\u4FE1\u606F\u901A\u4FE1\u7814\u7A76\u9662\uFF09\uFF0C\u5982\u679C\u4F60\u5BF9\u8FD9\u4E2A\u5355\u4F4D\u964C\u751F\u7684\u8BDD\u4F60\u53EF\u4EE5\u770B\u770B\u4F60\u7684\u884C\u7A0B\u7801\u4E0B\u9762\u670D\u52A1\u63D0\u4F9B\u5546\u6392\u5728\u7B2C\u4E00\u4E2A\u7684\u662F\u8C01\u3002\u4FE1\u901A\u9662\u662F\u5236\u5B9A\u6807\u51C6\u7684\u5355\u4F4D\uFF0C\u4E5F\u662F\u76D1\u7406\u5355\u4F4D\u3002\u5728\u4FE1\u901A\u9662\u7684\u8BDD\u4EE3\u7801\u5C31\u5F88\u5C11\u5199\u4E86\uFF0C\u66F4\u591A\u5C31\u662F\u5199\u6587\u6863\u4E86\uFF0C\u4E0D\u8FC7\u4FE1\u901A\u9662\u8FD9\u79CD\u5730\u65B9\u7684\u89C6\u91CE\u80AF\u5B9A\u9AD8\u4E00\u4E9B\u3002\u85AA\u8D44\u7684\u8BDD\u4FE1\u901A\u9662\u6BCF\u4E2A\u804C\u5DE5\u85AA\u8D44\u5DEE\u522B\u5F88\u5927\uFF0C\u521A\u8FDB\u53BB\u5DE5\u8D44\u5F88\u4F4E\uFF0C\u53EF\u80FD\u5C31\u56DB\u4E94\u5343\u5757\u94B1\uFF0C\u4F46\u662F\u85AA\u8D44\u6BCF\u4E2A\u6708\u90FD\u4F1A\u53D8\u5316\uFF0C\u7136\u540E\u7A33\u5B9A\u5728\u4E00\u4E2A\u6570\u3002\u85AA\u8D44\u4F4E\u7684\u6BCF\u6708\u5230\u624B\u6709\u4E00\u4E07\u51FA\u5934\uFF0C\u4F46\u6211\u77E5\u9053\u6BCF\u6708\u5230\u624B\u4E24\u4E09\u4E07\u751A\u81F3\u66F4\u591A\u7684\u4E5F\u662F\u6709\u7684\uFF08\u4E0D\u662F\u9886\u5BFC\u554A\uFF0C\u53EA\u662F\u804C\u5DE5\uFF09\u3002</p><h3 id="\u4E2D\u79D1\u9662\u7CFB\u5217" tabindex="-1"><a class="header-anchor" href="#\u4E2D\u79D1\u9662\u7CFB\u5217" aria-hidden="true">#</a> \u4E2D\u79D1\u9662\u7CFB\u5217</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-96c5f7a6-b13b-4153-9c7f-7c4617dbddca.png" alt=""></p><p>\u4E2D\u79D1\u9662\u7CFB\u5217\u4E0B\u8BA1\u7B97\u673A\u76F8\u5173\u6700\u5F3A\u7684\u4E09\u4E2A\u6240\u5C31\u662F\u81EA\u52A8\u5316\u6240\uFF08\u641E nlp \u7684\u5E94\u8BE5\u90FD\u542C\u8FC7\u5B97\u6210\u5E86\u8001\u5E08\uFF09\u3001\u8F6F\u4EF6\u6240\u3001\u8BA1\u7B97\u6240\u3002\u53E6\u5916\u8FD8\u6709\u4FE1\u5DE5\u6240\u3001\u7535\u5B50\u6240\u4E5F\u8FD8\u51D1\u5408\u3002\u6574\u4F53\u5F85\u9047\u4E0A\uFF0C\u4E2D\u79D1\u9662\u7CFB\u5217\u7684\u5F85\u9047\u4E0D\u5982\u822A\u7A7A\u822A\u5929\u7CFB\u5217\u7684\u3002\u4F60\u53EF\u4EE5\u628A\u4E2D\u79D1\u9662\u7CFB\u5217\u7684\u7814\u7A76\u6240\u5B8C\u5168\u7684\u60F3\u8C61\u6210\u4E00\u4E2A\u5927\u5B66\uFF08\u55EF\uFF0C\u4E0D\u7528\u60F3\u8C61\uFF0C\u786E\u5B9E\u662F\u4E2A\u5927\u5B66\uFF0C\u4E2D\u56FD\u79D1\u5B66\u9662\u5927\u5B66\u561B\uFF09\u3002\u6BCF\u4E2A\u56E2\u961F\u5C31\u662F\u4F60\u4EEC\u7814\u7A76\u751F\u7684\u5B9E\u9A8C\u5BA4\u3002\u57FA\u672C\u4E0A\u5C31\u662F\u4E00\u4E2A\u5927\u8001\u677F\uFF0C\u5E26\u51E0\u4E2A\u5C0F\u8001\u677F\uFF0C\u518D\u5E26\u51E0\u4E2A\u804C\u5DE5\uFF0C\u53E6\u5916\u518D\u914D\u51E0\u4E2A\u4E2D\u79D1\u9662\u7684\u5B66\u751F\u3002\u8BFE\u9898\u7EC4\u60F3\u8981\u6323\u94B1\u4E5F\u662F\u9700\u8981\u5927\u8001\u677F\u51FA\u53BB\u62C9\u6D3B\uFF0C\u7136\u540E\u5C0F\u8001\u677F\u5E26\u7740\u5B66\u751F\u53BB\u5E72\u6D3B\u3002\u5DE5\u4F5C\u65B9\u5F0F\u548C\u6280\u672F\u6C34\u5E73\u548C\u4F60\u4EEC\u7814\u7A76\u751F\u7684\u5B9E\u9A8C\u5BA4\u4E00\u6A21\u4E00\u6837\u7684\uFF0C\u5C31\u662F\u591A\u4E86\u4E00\u4E9B\u7855\u58EB\u535A\u58EB\u804C\u5DE5\u7F62\u4E86\u3002</p><p>\u4E2D\u79D1\u9662\u7CFB\u5217\u5404\u4E2A\u6240\u548C\u5404\u4E2A\u8BFE\u9898\u7EC4\u7684\u5F85\u9047\u4EE5\u53CA\u5DE5\u4F5C\u65B9\u5F0F\u5DEE\u8DDD\u7279\u522B\u5927\uFF0C\u5DE5\u8D44\u6709\u5C11\u91CF\u7684\u6BD4\u8F83\u9AD8\u7684\uFF08\u6211\u8BF4\u7684\u6BD4\u8F83\u9AD8\u662F\u80FD\u548C\u4E92\u8054\u7F51\u516C\u53F8\u6301\u5E73\uFF09\uFF0C\u5927\u90E8\u5206\u521A\u8FDB\u6765\u7684\u7855\u58EB\u5E94\u5C4A\u751F\u5DE5\u8D44\u5DEE\u4E0D\u591A\u5C31\u662F\u516B\u4E5D\u5343\uFF0C\u535A\u58EB\u4E00\u4E07\u591A\u70B9\u3002\u6709\u7684\u6240\u63D0\u4F9B\u5BBF\u820D\uFF0C\u6709\u7684\u6240\u8FDE\u5BBF\u820D\u90FD\u6CA1\u3002\u603B\u4F53\u4E0A\u6765\u8BF4\u60F3\u5728\u4E2D\u79D1\u9662\u6709\u597D\u7684\u53D1\u5C55\uFF0C\u9700\u8981\u4F60\u662F\u535A\u58EB\uFF0C\u7136\u540E\u591A\u53D1\u8BBA\u6587\u3002\u7B49\u4F60\u6210\u4E3A\u5C0F\u8001\u677F\u540E\uFF0C\u4E14\u56E2\u961F\u53EF\u4EE5\u9879\u76EE\u6210\u679C\u8F6C\u5316\uFF0C\u6216\u8005\u5B75\u5316\u4F01\u4E1A\u540E\u4F60\u7684\u5F85\u9047\u4F1A\u6709\u6BD4\u8F83\u5927\u7684\u53D8\u5316\u3002</p><h3 id="\u4E2D\u7535\u79D1\u7CFB\u5217" tabindex="-1"><a class="header-anchor" href="#\u4E2D\u7535\u79D1\u7CFB\u5217" aria-hidden="true">#</a> \u4E2D\u7535\u79D1\u7CFB\u5217</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-a4804493-fdb0-48ea-b9f5-82ad9a3d3d08.png" alt=""></p><p>\u4E2D\u7535\u79D1\u7CFB\u5217\u7684\u5F85\u9047\u6BD4\u822A\u7A7A\u822A\u5929\u7CFB\u5217\u7A0D\u5DEE\uFF0C\u6BD4\u4E2D\u79D1\u9662\u7CFB\u5217\u7A0D\u5F3A\u4E00\u4E9B\u3002\u6211\u611F\u89C9\u4E2D\u7535\u79D1\u7CFB\u5217\u7684\u52A0\u73ED\u5F3A\u5EA6\u6BD4\u8F83\u9AD8\uFF0C\u8BA4\u8BC6\u7684\u51E0\u4E2A\u5728\u4E2D\u7535\u79D1\u7CFB\u5217\u7684\u7ECF\u5E38 996 \u751A\u81F3 007\uFF0C\u8FD8\u7ECF\u5E38\u51FA\u5DEE\u3002\u5F85\u9047\u7684\u8BDD\u57FA\u672C\u5DE5\u8D44\u4E5F\u662F\u6BCF\u67081\u4E07\u51FA\u5934\uFF0C\u7136\u540E\u51FA\u5DEE\u4E5F\u662F\u6709\u51FA\u5DEE\u8865\u8D34\uFF0C\u6BCF\u5929300 \u6216\u8005400\uFF0C\u5177\u4F53\u8981\u770B\u56E2\u961F\u3002\u611F\u89C9\u5DE5\u8D44\u4E3B\u8981\u662F\u9760\u51FA\u5DEE\u8865\u8D34\u5806\u8D77\u6765\u7684\u3002\u5927\u90E8\u5206\u4E0B\u5C5E\u9662\u6240\u4F1A\u63D0\u4F9B\u804C\u5DE5\u5BBF\u820D\uFF0C\u4E2D\u7535\u79D1\u7CFB\u5217\u4E0B\u5C5E\u7814\u7A76\u6240\u98CE\u683C\u5DEE\u522B\u5F88\u5927\uFF0C\u597D\u8D77\u6765\u662F\u771F\u597D\uFF0C\u5751\u8D77\u6765\u662F\u771F\u5751\u554A\u3002</p><h3 id="\u4E2D\u56FD\u5175\u5668\u7CFB\u5217" tabindex="-1"><a class="header-anchor" href="#\u4E2D\u56FD\u5175\u5668\u7CFB\u5217" aria-hidden="true">#</a> \u4E2D\u56FD\u5175\u5668\u7CFB\u5217</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-db583262-a5d4-4137-88e1-90f0127ba755.png" alt=""></p><p>\u4E2D\u56FD\u5175\u5668\u7CFB\u5217\u8BA1\u7B97\u673A\u76F8\u5173\u4E13\u4E1A\u62DB\u7684\u4E0D\u662F\u592A\u591A\uFF0C\u5176\u5B9E\u6BCF\u5E74\u4E00\u5171\u62DB\u7684\u4EBA\u4E5F\u4E0D\u591A\u3002\u6211\u6700\u521D\u5BF9\u4E2D\u56FD\u5175\u5668\u7CFB\u5217\u7684\u7814\u7A76\u6240\u6709\u4E86\u89E3\u662F\u4E00\u4E2A\u6240\u6765\u6211\u4EEC\u5B66\u6821\u5BA3\u8BB2\u3002\u611F\u89C9\u4E2D\u56FD\u5175\u5668\u5728\u897F\u5B89\u7684\u51E0\u4E2A\u6240\u80FD\u7B97\u7684\u4E0A\u662F\u897F\u5B89\u7814\u7A76\u6240\u7684\u5929\u82B1\u677F\u4E86\u5427\uFF0C\u5F85\u9047\u8FD8\u4E0D\u9519\uFF08\u548C\u822A\u5929504\u6240\u6BD4\u6211\u6709\u70B9\u4E0D\u592A\u786E\u5B9A\uFF09\u4F46\u662F\u5728\u5317\u4EAC\u6211\u5C31\u4E0D\u592A\u6E05\u695A\u4E86\u3002</p><h3 id="\u519B\u4E8B\u79D1\u5B66\u9662\u7CFB\u5217" tabindex="-1"><a class="header-anchor" href="#\u519B\u4E8B\u79D1\u5B66\u9662\u7CFB\u5217" aria-hidden="true">#</a> \u519B\u4E8B\u79D1\u5B66\u9662\u7CFB\u5217</h3><p>\u519B\u4E8B\u79D1\u5B66\u9662\u7CFB\u5217\u7684\u7814\u7A76\u6240\u62DB\u7684\u804C\u4F4D\u90FD\u662F\u519B\u961F\u6587\u804C\uFF0C\u4E5F\u5C31\u662F\u8BF4\u90FD\u9700\u8981\u8003\u8BD5\u7684\u3002\u6211\u4E0A\u65F6\uFF0C\u542C\u8FC7\u51E0\u5BB6\u519B\u4E8B\u79D1\u5B66\u9662\u4E0B\u5C5E\u5355\u4F4D\u6765\u5BA3\u8BB2\uFF0C\u53EA\u662F\u6709\u4E2A\u7C97\u7565\u7684\u4E86\u89E3\u3002\u519B\u961F\u6587\u804C\u4E5F\u662F\u4E0A\u73ED\u5236\u7684\uFF0C\u4E0A\u73ED\u65F6\u4E5F\u662F\u9700\u8981\u7A7F\u519B\u88C5\u7684\uFF0C\u4E0B\u73ED\u540E\u7684\u751F\u6D3B\u4E0D\u5E72\u9884\u3002\u5DE5\u8D44\u6709\u4E2A\u5F88\u8BE6\u7EC6\u7684\u804C\u79F0\u5BF9\u5E94\u8868\uFF0C\u7855\u58EB\u8FDB\u53BB\u6211\u8BB0\u5F97\u662F\u4E00\u4E07\u51FA\u5934\u3002\u60F3\u6709\u597D\u7684\u53D1\u5C55\u6700\u597D\u53BB\u6293\u603B\u5355\u4F4D\uFF0C\u56E0\u4E3A\u4E0A\u9762\u63D0\u7684\u5F88\u591A\u7814\u7A76\u6240\u60F3\u8981\u9879\u76EE\u90FD\u5F97\u6293\u603B\u5355\u4F4D\u6279\u3002\u4E0D\u8FC7\u6293\u603B\u5355\u4F4D\u7684\u79D1\u7814\u5C97\u90FD\u8981\u535A\u58EB\u4E86\uFF0C\u7855\u58EB\u8FDB\u53BB\u53EA\u80FD\u662F\u652F\u6491\u5C97\u4F4D\u3002</p><p>\u5317\u4EAC\u6765\u6211\u4EEC\u5B66\u6821\u5BA3\u8BB2\u7684\u51E0\u5BB6\u519B\u79D1\u9662\u4E0B\u5C5E\u7814\u7A76\u6240\u90FD\u662F\u627F\u8BFA\u6237\u53E3\u4EE5\u53CA\u5305\u89E3\u51B3\u5B50\u5973\u4E0A\u5B66\u95EE\u9898\u7684\u3002\u5F53\u65F6\u8BF4\u7684\u662F\u535A\u58EB\u8FDB\u53BB\u526F\u8425\u7EA7\uFF0C\u4F1A\u63D0\u4F9B\u4E00\u4E2A\u56DB\u5341\u5E73\u5DE6\u53F3\u7684\u623F\u5B50\u4F4F\u3002\u7855\u58EB\u5C31\u662F\u666E\u901A\u4E24\u4EBA\u4E00\u95F4\u7684\u5BBF\u820D\u3002</p><h2 id="\u751F\u6D3B\u65B9\u9762" tabindex="-1"><a class="header-anchor" href="#\u751F\u6D3B\u65B9\u9762" aria-hidden="true">#</a> \u751F\u6D3B\u65B9\u9762</h2><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-799a0d1a-7782-4e3c-8a36-4c495cd94ae5.png" alt=""></p><p>\u5317\u4EAC\u5177\u4F53\u7684\u623F\u4EF7\u3001\u7F8E\u98DF\u6559\u80B2\u7B49\u60C5\u51B5\u6211\u653E\u5230\u4E0B\u4E00\u7BC7\u8BB2\u5317\u4EAC\u4E92\u8054\u7F51\u516C\u53F8\u7684\u6587\u7AE0\u4E2D\u597D\u597D\u53BB\u8BB2\u4E0B\u3002\u8FD9\u7BC7\u6587\u7AE0\u53EA\u8BB2\u4E00\u4E2A\u4E8B\uFF0C\u90A3\u5C31\u662F<strong>\u5317\u4EAC\u6237\u53E3</strong>\u3002\u5317\u4EAC\u6237\u53E3\u7684\u4E3B\u8981\u7528\u5904\u5C31\u662F\u5B50\u5973\u6559\u80B2\u95EE\u9898\uFF0C\u5176\u5B83\u7684\u4E00\u4E9B\u597D\u5904\u5C31\u662F\u6709\u5317\u4EAC\u6237\u53E3\u53EF\u4EE5\u7533\u8BF7\u5171\u6709\u4EA7\u6743\u623F\u8FD8\u6709\u6447\u8F66\u724C\u7B49\u3002\u5E94\u5C4A\u6BD5\u4E1A\u751F\u662F\u6700\u597D\u641E\u5B9A\u6237\u53E3\u7684\u65F6\u5019\u4E86\uFF0C\u5982\u679C\u4F60\u80FD\u8FDB\u8FD9\u7BC7\u6587\u7AE0\u4E2D\u8BB2\u7684\u8FD9\u4E9B\u5355\u4F4D\uFF0C\u5927\u6982\u7387\u4F60\u662F\u6709\u6237\u53E3\u7684\u3002\u4E0D\u8FC7\u62FF\u6237\u53E3\u7684\u540C\u65F6\u90FD\u8981\u7B7E\u4E00\u4E2A\u4E94\u5E74\u7684\u670D\u52A1\u671F\u5408\u540C\uFF0C\u8FDD\u7EA6\u91D1\u6BCF\u4E2A\u5355\u4F4D\u4E0D\u4E00\u6837\uFF0C 20\u4E07-50\u4E07\u4E0D\u7B49\uFF0C\u9010\u5E74\u9012\u51CF\u3002\u5BF9\u4E8E\u5E94\u5C4A\u751F\u6765\u8BF4\u6237\u53E3\u8C8C\u4F3C\u5438\u5F15\u529B\u6CA1\u6709\u7279\u522B\u7684\u5927\uFF0C\u6BD5\u7ADF\u73B0\u5728\u81EA\u5DF1\u8FD8\u987E\u4E0D\u8FC7\u6765\uFF0C\u4E5F\u4E0D\u77E5\u9053\u81EA\u5DF1\u5B50\u5973\u5728\u54EA\u5462\u3002\u4F46\u662F\u5BF9\u4E8E\u5DF2\u7ECF\u6709\u5B50\u5973\u7684\u4EBA\u6765\u8BF4\uFF0C\u6211\u4E00\u63D0\u7ED9\u5317\u4EAC\u6237\u53E3\u7684\u4E8B\u4ED6\u4EEC\u773C\u775B\u5C31\u4EAE\u4E86\u3002</p><p>\u5317\u4EAC\u8FD9\u4E9B\u5E74\u5BF9\u4E8E\u6237\u53E3\u6709\u4E5F\u9010\u6E10\u653E\u5BBD\uFF0C\u4E00\u4E9B\u4E92\u8054\u7F51\u516C\u53F8\u7684\u7279\u6B8A\u5E94\u5C4A\u62DB\u8058\u8BA1\u5212\u4E5F\u4F1A\u7ED9\u6237\u53E3\uFF0C\u53E6\u5916\u4ECA\u5E74\u53CC\u4E00\u6D41\u5B66\u79D1\u7684\u7855\u58EB\u4EE5\u4E0A\u5E94\u5C4A\u6BD5\u4E1A\u751F\u90FD\u7ED9\u6237\u53E3\u4E86\u3002</p><p>\u53E6\u5916\u60F3\u8981\u6237\u53E3\u8FD8\u53EF\u4EE5\u8D70\u79EF\u5206\u843D\u6237\uFF0C\u4E0D\u8FC7\u60F3\u8981\u9760\u79EF\u5206\u843D\u6237\u89E3\u51B3\u5317\u4EAC\u6237\u53E3\uFF0C\u5C31\u9700\u8981\u4F60\u5934\u4E0A\u6709\u7284\u89D2\uFF0C\u8EAB\u540E\u6709\u5C3E\u5DF4\u4E86\u3002</p><p>\u597D\u5566\uFF0C\u8FD9\u7BC7\u6587\u7AE0\u5C31\u4ECB\u7ECD\u8FD9\u4E48\u591A\uFF0C\u671F\u5F85\u4E0B\u4E00\u7BC7\u5317\u4EAC\u6709\u54EA\u4E9B\u5927\u578B\u4E92\u8054\u7F51\u516C\u53F8\u548C\u5916\u4F01\u5427\uFF01</p><h3 id="\u4E92\u8054\u7F51\u5927\u5382" tabindex="-1"><a class="header-anchor" href="#\u4E92\u8054\u7F51\u5927\u5382" aria-hidden="true">#</a> \u4E92\u8054\u7F51\u5927\u5382</h3><p>\u8C08\u5230\u4E92\u8054\u7F51\u516C\u53F8\uFF0C\u514D\u4E0D\u4E86\u8BF4\u85AA\u8D44\u3002\u5F88\u591A\u5E94\u5C4A\u751F\u6821\u62DB\u65F6\u7531\u4E8E\u6CA1\u6709\u5DE5\u4F5C\u7ECF\u9A8C\uFF0C\u5BB9\u6613\u88AB\u54C4\u3002\u9996\u5148\u8981\u77E5\u9053\uFF0C\u6821\u62DB\u7ED9\u4F60\u5F00\u51FA\u7684\u85AA\u8D44\u662F\u53EF\u4EE5 argue \u7684\uFF0C\u4E5F\u5C31\u662F\u8BF4\u53EF\u4EE5\u548C hr \u5546\u91CF\u3002\u7136\u540E\u6211\u4E3B\u8981\u60F3\u8BF4\u7684\u662F\uFF0C\u8981\u8C08\u4F60\u53BB\u548C HR \u8C08 <strong>base</strong>\uFF08\u6BCF\u6708\u57FA\u7840\u5DE5\u8D44\uFF09, \u53EF\u4E0D\u6562\u53BB\u548C hr argue \u6BCF\u5E74\u591A\u5C11\u85AA\u54C8\u3002\u4E00\u4E2A\u54E5\u4EEC\u7ED9\u6211\u8BB2\u4E86\u4E2A\u771F\u4E8B\uFF0C\u4ED6\u4EEC\u516C\u53F8\u4E00\u4E2A\u5E94\u5C4A\u751F\u5ACC 25k x 15 \u5C11\uFF0CHR \u8DDF\u4ED6\u8BF4\u90A3\u7ED9\u4F60 25k X 16 \u5427\uFF0C\u7136\u540E\u90A3\u4E2A\u5E94\u5C4A\u751F\u5C31\u5F00\u5FC3\u7684\u7B54\u5E94\u4E86\u3002HR \u7ED9\u4F60\u627F\u8BFA\u7684\u6BCF\u6708 base \u662F\u6CA1\u95EE\u9898\u7684\uFF0C\u4F46\u662F\u8BF4\u6BCF\u5E74\u53D1\u591A\u5C11\u4E2A\u6708\u7684\u6708\u85AA\u53EA\u662F\u4E00\u4E2A\u671F\u671B\uFF0C\u6700\u7EC8\u7ED9\u4F60\u53D1\u51E0\u4E2A\u6708\u7684\u5E74\u7EC8\u5956\u8981\u6839\u636E\u4F60\u5230\u5E74\u5E95\u7684\u8BC4\u5206\u4EE5\u53CA\u4F60\u6240\u5728\u56E2\u961F\u5E74\u5E95\u7684\u8BC4\u5206\u5171\u540C\u51B3\u5B9A\u3002</p><p>\u4E0B\u9762\u6211\u8BF4\u7684\u5404\u4E2A\u516C\u53F8\u85AA\u8D44\u65F6\u8BF4\u7684\u6BCF\u5E74\u591A\u5C11\u85AA\u4E5F\u662F HR \u8BF4\u7684\u4E00\u4E2A\u671F\u671B\u85AA\u8D44\u5440\uFF01\u8BB8\u591A\u8BF4\u53D1 4 \u4E2A\u6708\u5E74\u7EC8\u5956\u7684\uFF0C\u5B9E\u9645\u4E0A\u4E00\u534A\u4EBA\u62FF\u4E0D\u5230\u3002</p><h4 id="\u767E\u5EA6" tabindex="-1"><a class="header-anchor" href="#\u767E\u5EA6" aria-hidden="true">#</a> \u767E\u5EA6</h4><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-7d1367ae-04c1-4162-aed8-2a99203a623d.jpg" alt=""></p><p>\u5750\u6807\uFF1A\u897F\u5317\u65FA</p><p>2022\u6821\u62DB\u85AA\u8D44\uFF1A\u5F00\u53D1\u5C97\u767D\u83DC\u4EF7 22k\uFF0Csp 24k\uFF0Cssp 26k \u3002\u7B97\u6CD5\u5C97\u767D\u83DC\u4EF7 26k\uFF0Csp 29k\uFF0Cssp 32k\u3002\u6BCF\u5E74 16 \u85AA\u3002</p><p>\u4E2A\u4EBA\u8BC4\u4EF7\uFF1A\u66FE\u7ECF\u5341\u5206\u5F3A\u5927\u7684\u767E\u5EA6\u8FD9\u51E0\u5E74\u9010\u6E10\u548C\u817E\u8BAF\u963F\u91CC\u62C9\u5F00\u4E86\u5DEE\u8DDD\u3002\u4E0D\u8FC7\u5C31\u6211\u4E2A\u4EBA\u800C\u8A00\u8FD8\u662F\u6BD4\u8F83\u559C\u6B22\u767E\u5EA6\u7684\u3002\u9996\u5148\u767E\u5EA6\u662F\u4EE5\u6280\u672F\u4E3A\u5BFC\u5411\u7684\uFF0C\u8FD9\u4E00\u70B9\u4F5C\u4E3A\u7A0B\u5E8F\u5458\u5E94\u8BE5\u4F1A\u6709\u6BD4\u8F83\u597D\u7684\u4F53\u9A8C\uFF0C\u53E6\u5916\u767E\u5EA6\u603B\u4F53\u6765\u8BF4\u52A0\u73ED\u4E0D\u662F\u7279\u522B\u4E25\u91CD\u3002\u5DE5\u4F5C\u5236\u5DEE\u4E0D\u591A 975 \u6216\u8005\u662F 985, \u524D\u4E24\u5468\u6211\u8D81\u7740\u53BB\u627E\u5728\u767E\u5EA6\u7684\u540C\u5B66\u73A9\u7684\u673A\u4F1A\uFF0C\u5468\u516D\u4E0B\u5348\u4E09\u70B9\u5DE6\u53F3\u5728\u767E\u5EA6\u5927\u697C\u91CC\u8F6C\u4E86\u4E00\u5708\uFF0C\u6700\u8D77\u7801\u5468\u672B\u662F\u6CA1\u51E0\u4E2A\u5DE5\u4F4D\u4E0A\u6709\u4EBA\u7684\u3002\u5DE5\u4F4D\u4E0A\u6709\u4EBA\u7684\u770B\u6837\u5B50\u4E5F\u662F\u8D81\u5468\u672B\u60F3\u81EA\u5DF1\u5355\u72EC\u5B66\u4E60\u4F1A\u3002\u53E6\u5916\u767E\u5EA6\u7684\u529E\u516C\u73AF\u5883\u8FD8\u4E0D\u9519\uFF0C\u98DF\u5802\u4E5F\u5F88\u597D\u3002\u767E\u5EA6\u5728\u5317\u4EAC\u7684\u90E8\u95E8\u4EE5\u53CA\u5C97\u4F4D\u90FD\u7279\u522B\u9F50\u5168\uFF0C\u53EA\u662F\u5927\u91CF\u7684\u5F00\u53D1\u5C97\u4F4D\u7528 php \u6709\u70B9\u96BE\u9876\u3002</p><p>\u767E\u5EA6\u8FD9\u4E24\u5E74\u96C6\u4E2D\u53D1\u5C55\u4EBA\u5DE5\u667A\u80FD\uFF0C\u8FD9\u4E00\u70B9\u5728\u7ED9\u6821\u62DB\u5F00\u51FA\u7684\u85AA\u8D44\u4E0A\u4E5F\u80FD\u770B\u5F97\u51FA\u6765\u3002\u4E0D\u5F97\u4E0D\u8BF4\u8FD9\u4E24\u5E74\u6821\u62DB\u7684\u85AA\u8D44\u662F\u771F\u9AD8\u5440\uFF0C\u5C31\u4E0D\u7528\u8BF4\u7B97\u6CD5\u5C97\u6821\u62DB\u7684\u85AA\u8D44\uFF0C\u5F00\u53D1\u5C97\u6821\u62DB\u7684\u85AA\u8D44\u90FD\u5012\u6302\u4E86\u4E0D\u5C11\u8001\u5458\u5DE5\u3002\u767E\u5EA6\u5728\u7B97\u6CD5\u4E0A\u6295\u5165\u7684\u51B3\u5FC3\u662F\u633A\u5927\u7684\uFF0C\u81EA\u5DF1\u80FD\u641E\u51FA\u6DF1\u5EA6\u5B66\u4E60\u6846\u67B6 PaddlePaddle \u5341\u5206\u8BA9\u6211\u656C\u4F69\u3002\u8BFB\u7814\u65F6\u5B9E\u9A8C\u5BA4\u663E\u5361\u4E0D\u591F\u6211\u8FD8\u7ECF\u5E38\u4E0A\u767E\u5EA6\u7684 AI Studio \u5E73\u53F0\u4E0A\u8585\u7F8A\u6BDB\uFF0C\u6709\u6B21\u987A\u624B\u6253\u4E86\u4E2A\u6BD4\u8D5B\u5F97\u4E86\u4E2A\u540D\u6B21\uFF0C\u6392\u540D\u4E0D\u9AD8\uFF0C\u4F46\u767E\u5EA6\u8FD8\u771F\u7ED9\u6211\u5BC4\u6765\u51E0\u767E\u5757\u94B1\u7684\u8D2D\u7269\u5238\u3002\u53EA\u662F\u6700\u8FD1\u767E\u5EA6\u65E0\u4EBA\u8F66\u8FDB\u5C55\u7684\u4E0D\u592A\u987A\u5229\uFF0C\u611F\u89C9\u662F\u767E\u5EA6\u4EBA\u5DE5\u53EA\u80FD\u53D1\u5C55\u7684\u4E00\u5927\u632B\u6298\u4E86\u3002</p><h4 id="\u817E\u8BAF" tabindex="-1"><a class="header-anchor" href="#\u817E\u8BAF" aria-hidden="true">#</a> \u817E\u8BAF</h4><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-7d6cd775-8895-447a-a348-27443594bdcd.jpg" alt=""></p><p>\u5750\u6807\uFF1A\u897F\u5317\u65FA</p><p>2022\u6821\u62DB\u85AA\u8D44\uFF1A19-25k\uFF0C\u6BCF\u5E74 16 \u85AA\uFF1B\u6BCF\u6708 4k \u79DF\u623F\u8865\u8D34\uFF1B6-10 w\u7684\u7B7E\u5B57\u8D39\u5206\u4E24\u5E74\u53D1\u653E\u3002</p><p>\u4E2A\u4EBA\u8BC4\u4EF7\uFF1A\u5317\u4EAC\u8FD9\u8FB9\u817E\u8BAF\u548C\u767E\u5EA6\u7684\u529E\u516C\u697C\u79BB\u5F97\u5F88\u8FD1\uFF0C\u817E\u8BAF\u5728\u5317\u4EAC\u8FD9\u8FB9\u7684\u90E8\u95E8\u4E3B\u8981\u662F PCG \u4E8B\u4E1A\u7FA4\uFF08PCG \u4E2D\u90FD\u662F\u817E\u8BAF\u548C\u5A92\u4F53\u5BA3\u4F20\u76F8\u5173\u7684\u90E8\u95E8\uFF0C\u5305\u542B\u817E\u8BAF\u89C6\u9891\u3001\u817E\u8BAF\u65B0\u95FB\u3001\u817E\u8BAFQQ\u7B49\uFF0C\u53E6\u5916\u592E\u89C6\u9891\u4E5F\u662F\u5305\u7ED9\u5317\u4EAC\u8FD9\u8FB9\u7684\u817E\u8BAF\u505A\u7684\u3002\u8BDD\u8BF4PCG \u5728\u8109\u8109\u4E0A\u88AB\u55B7\u7684\u5F88\u60E8\uFF09\u3002\u817E\u8BAF\u4E3B\u8981\u7528\u7684\u8BED\u8A00\u662F C++ \u548C Go\uFF0C\u6211\u89C1\u8FC7\u4E00\u4E2A\u90E8\u95E8\u62DB Java \u7684\uFF0C\u4E0D\u8FC7\u4E00\u65B9\u9762\u662F\u62DB\u7684\u4EBA\u6570\u592A\u5C11\uFF0C\u4E00\u65B9\u9762\u5728\u817E\u8BAF\u505A Java \u603B\u89C9\u5F97\u6709\u70B9\u602A\u602A\u7684\u3002\u4ECB\u7ECD\u767E\u5EA6\u65F6\u8BF4\u7684\u767E\u5EA6\u662F\u4EE5\u6280\u672F\u4E3A\u5BFC\u5411\u7684\u662F\u8BF4\u7ED9\u817E\u8BAF\u542C\u7684\uFF0C\u56E0\u4E3A\u817E\u8BAF\u662F\u4EE5\u4EA7\u54C1\u4E3A\u5BFC\u5411\u7684\u3002\u4EA7\u54C1\u7684\u8BDD\u8BED\u6743\u6BD4\u7A0B\u5E8F\u5458\u5927\u3002</p><p>\u817E\u8BAF\u7684\u798F\u5229\u662F\u7279\u522B\u9999\u7684\uFF0C\u98DF\u5802\u4E5F\u5F88\u597D\u3002\u7279\u522B\u4ECA\u5E74\u628A\u79DF\u623F\u8865\u8D34\u6DA8\u5230\u4E864k\u3002\u90A3\u80AF\u5B9A\u6709\u9E45\u9009\u9E45\u5440\u3002</p><p>\u8FD1\u671F\u641C\u72D7\u4E5F\u5E76\u5165\u817E\u8BAF\u4E86\uFF0C\u5E76\u5230\u4E86\u817E\u8BAF\u7684 Pcg \u4E8B\u4E1A\u7FA4\u4E0B\uFF0C\u76EE\u524D\u5404\u65B9\u9762\u5DF2\u7ECF\u548C\u817E\u8BAF\u5BF9\u9F50\u4E86\u3002\u6211\u6709\u4E2A\u540C\u5B66\u5148\u5728\u817E\u8BAF\u7684 PCG \u5B9E\u4E60\uFF0C\u7136\u540E\u6821\u62DB\u6700\u7EC8\u9009\u62E9\u4E86\u53BB\u641C\u72D7\uFF0C\u7ED3\u679C\u53C8\u88AB\u5E76\u56DE PCG \u4E86\uFF0C\u4E5F\u662F\u7279\u522B\u7684\u7F18\u5206\u3002\u4E0A\u9762\u7684\u56FE\u5C31\u662F\u6211\u5728\u641C\u72D7\u8336\u6C34\u95F4\u62CD\u5230\u7684\u7167\u7247~\u53EF\u4EE5\u770B\u5230\u5DF2\u7ECF\u90FD\u6362\u6210\u817E\u8BAF logo \u4E86\u3002\u641C\u72D7\u4E0D\u5728\u897F\u5317\u65FA\uFF0C\u641C\u72D7\u5728\u4E94\u9053\u53E3\u9644\u8FD1\u5440\u3002</p><h4 id="\u963F\u91CC\u5DF4\u5DF4" tabindex="-1"><a class="header-anchor" href="#\u963F\u91CC\u5DF4\u5DF4" aria-hidden="true">#</a> \u963F\u91CC\u5DF4\u5DF4</h4><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-996bbbca-dd9c-4108-b796-46f29dd840e9.jpg" alt=""></p><p>\u5750\u6807\uFF1A\u671B\u4EAC</p><p>2022\u6821\u62DB\u85AA\u8D44\uFF1A\u5F00\u53D1\u5C97\u767D\u83DC\u4EF7 21-24k\uFF0Csp 25-28k\uFF0Cssp 29-30k\u3002\u7B97\u6CD5\u5C97\u767D\u83DC\u4EF7 25k\uFF0Csp 29-31k\uFF0Cssp 33-36k\u3002\u6BCF\u5E74 16 \u85AA\uFF0C\u7B7E\u5B57\u8D39 1-10w\uFF0C\u8FD8\u4F1A\u989D\u5916\u53D1 6k \u7684\u642C\u5BB6\u8D39\u3002</p><p>\u4E2A\u4EBA\u8BC4\u4EF7\uFF1A\u5317\u4EAC\u7684\u963F\u91CC\u5DF4\u5DF4\u5927\u697C\u5728\u671B\u4EAC\u3002\u53E6\u5916\u76EE\u524D\u963F\u91CC\u5DF4\u5DF4\u7684\u5317\u4EAC\u603B\u90E8\u4E5F\u5728\u5EFA\u8BBE\u4E2D\uFF0C\u9884\u8BA12023\u5E74\u6295\u5165\u4F7F\u7528\u3002\u963F\u91CC\u5DF4\u5DF4\u8FD1\u4E24\u5E74\u4E00\u76F4\u6709\u8D1F\u9762\u6D88\u606F\uFF0C\u6211\u4E2A\u4EBA\u800C\u8A00\u4E5F\u4E0D\u592A\u559C\u6B22\u963F\u91CC\u7684\u72FC\u6027\u6587\u5316\u3002\u4F46\u662F\u6709\u4E00\u8BF4\u4E00\uFF0C\u963F\u91CC\u7684\u6280\u672F\u5728\u56FD\u5185\u7684\u4E92\u8054\u7F51\u662F\u6570\u4E00\u6570\u4E8C\u7684\u3002\u4ECE\u963F\u91CC\u51FA\u6765\u7684\u804C\u5DE5\u8DF3\u69FD\u7684\u8BA4\u53EF\u5EA6\u7EDD\u5BF9\u662F\u5F88\u9AD8\u7684\u3002\u4E0D\u8FC7\u8FD8\u662F\u6C42\u6C42\u4F60\u4EEC\u522B\u5377\u5566\uFF01</p><h4 id="\u5B57\u8282\u8DF3\u52A8" tabindex="-1"><a class="header-anchor" href="#\u5B57\u8282\u8DF3\u52A8" aria-hidden="true">#</a> \u5B57\u8282\u8DF3\u52A8</h4><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-fd757b6c-154c-4aa6-95a8-467d6a9a83b4.jpg" alt=""></p><p>\u5750\u6807\uFF1A\u4E2D\u822A\u5E7F\u573A</p><p>2022\u6821\u62DB\u85AA\u8D44\uFF1A\u5F00\u53D1\u5C97\u767D\u83DC\u4EF722-24k\uFF0Csp 26-28k\uFF0Cssp 30-33k\u3002\u7B97\u6CD5\u5C97\u767D\u83DC\u4EF726-29k\uFF0Csp 30-32k\uFF0Cssp 35k\u3002\u6BCF\u5E7415\u85AA\uFF0C\u8FD8\u67091w-12w\u7684\u7B7E\u5B57\u8D39\uFF0C\u6211\u770B\u5927\u90E8\u5206\u662F 1w\uFF01\u4F4F\u5728 30\u5206\u949F\u5185\u53EF\u4EE5\u5230\u8FBE\u516C\u53F8\u7684\u5730\u65B9\u989D\u5916\u4F1A\u6709 1500 \u7684\u79DF\u623F\u8865\u8D34\u3002</p><p>\u4E2A\u4EBA\u8BC4\u4EF7\uFF1A\u76EE\u524D\u5B57\u8282\u6162\u6162\u7684\u628A BAT \u4E2D\u7684 B \u6362\u6210\u4E86 ByteDance \u7684 B\uFF0C\u5B57\u8282\u76EE\u524D\u6280\u672F\u7684\u8BA4\u53EF\u5EA6\u662F\u5F88\u9AD8\u7684\u3002\u6211\u7684\u4E00\u4F4D\u5B66\u957F 18 \u5E74\u65F6\u7EA0\u7ED3\u53BB\u4EAC\u4E1C\u8FD8\u662F\u53BB\u5B57\u8282\uFF0818\u5E74\u65F6\u6211\u542C\u5B57\u8282\u8DF3\u52A8\u8FD9\u4E2A\u540D\u5B57\u8FD8\u6709\u4E9B\u8BB8\u964C\u751F\uFF09\uFF0C\u6700\u7EC8\u53BB\u4E86\u5B57\u8282\u3002\u7136\u540E\u4ED6\u73B0\u5728\u7684\u85AA\u8D44\u5DF2\u7ECF\u8BA9\u6211\u5341\u5206\u60CA\u53F9\u4E86\u3002\u5B57\u8282\u8DF3\u52A8\u7684\u798F\u5229\u5F85\u9047\u4E5F\u7279\u522B\u597D\uFF0C\u6700\u8FD1\u56E0\u4E3A\u4E1A\u52A1\u5F71\u54CD\u88C1\u5E94\u5C4A\u751F\u867D\u7136\u662F\u65E0\u5948\u4E4B\u4E3E\uFF0C\u4E0D\u8FC7\u6216\u591A\u6216\u5C11\u5BF9\u516C\u53F8\u6709\u70B9\u5F71\u54CD\u3002\u5B57\u8282\u6700\u8FD1\u5728\u897F\u5B89\u8BBE\u7ACB\u4E86\u7814\u53D1\u4E2D\u5FC3\uFF0C\u53E6\u5916\u542C\u8BF4\u5728\u9752\u5C9B\u5F00\u4E86\u4E00\u4E2A\u5143\u5B87\u5B99\u7814\u53D1\u4E2D\u5FC3\uFF0C\u5DE5\u4F5C\u5730\u70B9\u5728\u5E02\u5317\uFF0C\u6821\u62DB\u62DB\u4EBA\uFF0C\u611F\u5174\u8DA3\u7684\u53EF\u4EE5\u53BB\u770B\u770B\u3002</p><h4 id="\u7F8E\u56E2" tabindex="-1"><a class="header-anchor" href="#\u7F8E\u56E2" aria-hidden="true">#</a> \u7F8E\u56E2</h4><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-809a1c71-7a8f-43c8-ad4b-befab2fe5cf2.jpg" alt=""></p><p>\u5750\u6807\uFF1A\u671B\u4EAC</p><p>2022\u6821\u62DB\u85AA\u8D44\uFF1A\u5F00\u53D1\u5C97\u767D\u83DC\u4EF721k\uFF0Csp 24k\uFF0Cssp 27-29k\u3002\u7B97\u6CD5\u5C97\u767D\u83DC\u4EF7 24k\uFF0Csp 27k\uFF0Cssp30-32k\u3002\u6BCF\u5E7415.5\u85AA\u3002\u5176\u4F59\u7684\u798F\u5229\u4E5F\u5C31\u662F\u6BCF\u5929 30 \u996D\u8865\u548C 9 \u70B9\u4EE5\u540E\u6253\u8F66\u4E86\u3002</p><p>\u4E2A\u4EBA\u8BC4\u4EF7\uFF1A\u7F8E\u56E2\u7684\u6280\u672F\u7EDD\u5BF9\u6CA1\u5F97\u8BF4\uFF0C\u7279\u522B\u662F\u5BF9\u4E8E\u5E94\u5C4A\u751F\u6709\u4E0D\u9519\u7684\u57F9\u517B\uFF0C\u7F8E\u56E2\u7684\u5B66\u57CE\u4E0A\u6709\u5F88\u591A\u8D28\u91CF\u5F88\u9AD8\u7684\u6280\u672F\u8D44\u6599\uFF0C\u8BB8\u591A\u4ECE\u7F8E\u56E2\u79BB\u804C\u7684\u5458\u5DE5\u90FD\u60F3\u5FF5\u7F8E\u56E2\u7684\u5B66\u57CE\u3002\u53E6\u5916\u7ED9\u7684\u85AA\u8D44\u4ECE\u53BB\u5E74\u85AA\u8D44\u5927\u6DA8\u540E\u4E5F\u7B97\u4E0D\u9519\u4E86\u3002\u867D\u7136\u4ECA\u5E74\u6821\u62DB\u6BD4\u53BB\u5E74\u6CA1\u600E\u4E48\u6DA8\uFF0C\u53EA\u662F\u5728 ssp \u7684\u85AA\u8D44\u4E0A\u505A\u4E86\u4E00\u4E9B\u8C03\u6574\uFF0C\u4F46\u662F\u51ED\u826F\u5FC3\u8BB2\uFF0C\u4E00\u4E2A\u5E94\u5C4A\u751F\u8FD9\u4E2A\u4EF7\u786E\u5B9E\u4E0D\u4F4E\u4E86\u3002\u4E0D\u8FC7\u7F8E\u56E2\u7684\u529E\u516C\u73AF\u5883\u548C\u798F\u5229\u5C31\u592A\u5DEE\u52B2\u4E86\uFF0C\u9996\u5148\u7F8E\u56E2\u7684\u529E\u516C\u5927\u697C\u90FD\u662F\u79DF\u7684\uFF0C\u5DE5\u4F4D\u4E5F\u90FD\u5F88\u7B80\u964B\uFF0C\u4E5F\u6CA1\u98DF\u5802\u3002\u522B\u7684\u516C\u53F8\u8FC7\u8282\u53D1\u793C\u54C1\uFF0C\u597D\u5BB6\u4F19\uFF0C\u4F60\u56E2\u53D1\u4E2A\u8D3A\u5361\uFF0C\u8981\u4E48\u53D1\u4E2A\u5FAE\u4FE1\u7684\u7EA2\u5305\u4E13\u5C5E\u5C01\u76AE...</p><h4 id="\u4EAC\u4E1C" tabindex="-1"><a class="header-anchor" href="#\u4EAC\u4E1C" aria-hidden="true">#</a> \u4EAC\u4E1C</h4><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-e08e1eef-6561-4057-a12e-3a1183fb9ae1.png" alt=""></p><p>\u5750\u6807\uFF1A\u4EA6\u5E84</p><p>2022\u6821\u62DB\u85AA\u8D44: \u5F00\u53D1\u5C97\u767D\u83DC\u4EF7 19.5-23k\uFF0Csp 25-26.5k\uFF0Cssp 29k\u3002\u7B97\u6CD5\u5C97\u767D\u83DC\u4EF7 27.5k\uFF0Csp 31-33.5k\uFF0Cssp 36.5k\u3002\u6BCF\u5E74 15 \u85AA\u3002</p><p>\u4E2A\u4EBA\u8BC4\u4EF7\uFF1A\u9996\u5148\u8BF4\u5750\u6807\u54E6\uFF0C\u4EAC\u4E1C\u5728\u4EA6\u5E84\uFF0C\u79DF\u623F\u4F1A\u76F8\u5BF9\u4FBF\u5B9C\u4E00\u4E9B\uFF0C\u7701\u5230\u5C31\u662F\u8D5A\u5230\u3002\u7136\u540E\u8BF4\u85AA\u8D44\uFF0C\u4EAC\u4E1C\u6709\u4E2A\u4E0D\u592A\u597D\u7684\u5730\u65B9\u5C31\u662F\u85AA\u8D44\u7684 20% \u662F\u7EE9\u6548\uFF0C\u867D\u7136\u7EE9\u6548\u4E00\u822C\u90FD\u80FD\u62FF\u6EE1\uFF0C\u4F46\u662F\u8FD9\u90E8\u5206\u7EE9\u6548\u5C31\u4E0D\u7528\u4EA4\u4F4F\u623F\u516C\u79EF\u91D1\u4E86\u5440\u3002\u4EAC\u4E1C\u5468\u672B\u5F88\u5C11\u52A0\u73ED\uFF0C\u5468\u5185\u5927\u90E8\u5206 8 \u70B9\u5DE6\u53F3\u4E0B\u73ED\u7684\u6837\u5B50\u3002</p><h4 id="\u7F51\u6613" tabindex="-1"><a class="header-anchor" href="#\u7F51\u6613" aria-hidden="true">#</a> \u7F51\u6613</h4><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-fc7b1b08-0363-4af6-adc2-e6185c55bb9c.png" alt=""></p><p>\u5750\u6807:\u897F\u5317\u65FA</p><p>2022\u6821\u62DB\u85AA\u8D44:\u5317\u4EAC\u8FD9\u8FB9\u7F51\u6613\u7684\u85AA\u8D44\u5212\u5206\u7684\u4E0D\u592A\u660E\u786E\uFF0C\u6211\u770B\u5F00\u53D1\u7206\u6599\u51FA\u7684\u6708\u85AA\u4ECE 18.4k\u300122k\u300124k\u300125.5k\u7684\u90FD\u6709\u3002\u7B97\u6CD5\u7206\u51FA\u7684\u6708\u85AA 25.5k\uFF0C27.5k, 30k\u7684\u90FD\u6709\u3002\u6BCF\u5E74 15 \u85AA\u3002</p><p>\u4E2A\u4EBA\u8BC4\u4EF7:\u5317\u4EAC\u8FD9\u8FB9\u57FA\u672C\u4E0A\u90FD\u662F\u7F51\u6613\u6709\u9053\u56E2\u961F\u7684\uFF0C\u4ECA\u5E74\u85AA\u8D44\u7ED9\u7684\u4E0D\u592A\u884C\u5440\uFF0C\u4E0D\u8FC7\u6211\u767E\u5EA6\u7684\u670B\u53CB\u548C\u6211\u8BF4\u4ED6\u6BCF\u6B21\u665A\u4E0A\u770B\u7F51\u6613\u5927\u697C\u7684\u706F\u603B\u662F\u5173\u7684\u6700\u65E9\u7684\uFF08\u897F\u5317\u65FA\u805A\u96C6\u7684\u51E0\u5BB6\u516C\u53F8\u5728\u697C\u4E0A\u53EF\u4EE5\u4E92\u76F8\u770B\u5230\u5BF9\u65B9\uFF09</p><h3 id="\u5927\u578B\u5916\u4F01" tabindex="-1"><a class="header-anchor" href="#\u5927\u578B\u5916\u4F01" aria-hidden="true">#</a> \u5927\u578B\u5916\u4F01</h3><p>\u5916\u4F01\u7684 wlb\uFF08\u5DE5\u4F5C\u751F\u6D3B\u5E73\u8861\uFF09\u4E00\u76F4\u662F\u5927\u5BB6\u5341\u5206\u559C\u6B22\u7684\uFF0C\u4E0D\u8FC7\u8FD1\u51E0\u5E74\u7531\u4E8E\u56FD\u5185\u4E92\u8054\u7F51\u5927\u5382\u7ED9\u7684\u5B9E\u5728\u592A\u591A\u4E86\u3002\u540C\u6837\u7684\u6C34\u5E73\u56FD\u5185\u4E92\u8054\u7F51\u7ED9\u7684\u85AA\u8D44\u5927\u6982\u4F1A\u6BD4\u5916\u4F01\u591A50%\u5DE6\u53F3\u3002\u53E6\u5916\u4E00\u4E9B\u540C\u5B66\u4E5F\u4F1A\u62C5\u5FC3\u5728\u5916\u4F01\u5F85\u51E0\u5E74\u540E\u5DE5\u4F5C\u548C\u6280\u672F\u9002\u5E94\u4E0D\u4E86\u56FD\u5185\u7684\u5F3A\u5EA6\u3002\u6240\u4EE5\u8BB8\u591A offer \u6536\u5272\u673A\u62FF\u5230\u8BB8\u591A\u5927\u5382 offer \u548C\u5927\u578B\u5916\u4F01 offer \u540E\u4E5F\u4F1A\u72B9\u8C6B\u8BE5\u53BB\u54EA\u3002</p><p>\u8BB8\u591A\u4EBA\u4F1A\u95EE\u9762\u5916\u4F01\u662F\u5426\u9700\u8981\u7528\u82F1\u6587\u9762\u8BD5\uFF1F\u6211\u95EE\u4E86\u51E0\u4F4D\u5728\u5916\u4F01\u7684\u8001\u54E5\uFF0C\u5171\u540C\u7684\u8BF4\u6CD5\u662F\u8981\u770B\u4F60\u9762\u7684\u7EC4\u548C\u804C\u7EA7\u3002\u6709\u7684\u7EC4\u662F\u9891\u7E41\u548C\u56FD\u5916\u5F00\u4F1A\u4EA4\u6D41\u7684\uFF0C\u8FD9\u81EA\u7136\u9700\u8981\u4F60\u82F1\u8BED\u597D\uFF0C\u4F46\u662F\u5982\u679C\u4F60\u9762\u7684\u7EC4\u548C\u56FD\u5916\u5F00\u4F1A\u5C11\uFF0C\u90A3\u4E48\u5C31\u4E0D\u9700\u8981\u4F60\u82F1\u8BED\u597D\u3002\u53E6\u5916\u770B\u4F60\u9762\u7684\u804C\u7EA7\u662F\u5426\u6BD4\u8F83\u9AD8\uFF0C\u5982\u679C\u804C\u7EA7\u9AD8\uFF0C\u548C\u56FD\u5916\u4EA4\u6D41\u7684\u4E8B\u81EA\u7136\u5C11\u4E0D\u4E86\u3002\u4F46\u662F\u5982\u679C\u4F60\u53EA\u662F\u7EC4\u957F\u7ED9\u4F60\u5E03\u7F6E\u6D3B\u4F60\u5E72\u7684\u8BDD\uFF0C\u4E5F\u4E0D\u9700\u8981\u4F60\u82F1\u8BED\u597D\u3002</p><h4 id="hulu" tabindex="-1"><a class="header-anchor" href="#hulu" aria-hidden="true">#</a> Hulu</h4><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-483d5154-671c-4ef4-844c-3240f34b6008.png" alt=""></p><p>\u5750\u6807\uFF1A\u671B\u4EAC</p><p>2022\u6821\u62DB\u85AA\u8D44\uFF1AHulu \u62DB\u4EBA\u7684\u91CF\u4E0D\u5927\uFF0C\u6240\u4EE5\u7206\u6599\u85AA\u8D44\u7684\u4EBA\u4E0D\u591A\u3002\u6709\u9650\u7684\u51E0\u4E2A\u7206\u6599\u7684\u5E74\u5305\u90FD\u5728 50w \u4EE5\u4E0A\u3002</p><p>\u4E2A\u4EBA\u8BC4\u4EF7\uFF1A\u53EF\u80FD\u505A\u5F00\u53D1\u7684\u540C\u5B66\u6CA1\u542C\u8BF4\u8FC7\u8FD9\u4E2A\u516C\u53F8\uFF0C\u4E0D\u8FC7\u505A\u7B97\u6CD5\u7684\u540C\u5B66\u5E94\u8BE5\u77E5\u9053\u8FD9\u5BB6\u516C\u53F8\u7684\u5F88\u591A\uFF0C\u8FD9\u5BB6\u516C\u53F8\u51FA\u4E86\u4E00\u672C\u633A\u4E0D\u9519\u7684\u4E66\u7C4D\u53EB\u300A\u767E\u9762\u673A\u5668\u5B66\u4E60\u300B\u3002\u6709\u8BB8\u591A\u540C\u5B66\u5E94\u8BE5\u5728\u51C6\u5907\u7B97\u6CD5\u9762\u8BD5\u65F6\u770B\u8FC7\u8FD9\u672C\u4E66\u3002Hulu \u662F\u7F8E\u56FD\u7684\u4E00\u4E2A\u6BD4\u8F83\u70ED\u7684\u89C6\u9891\u7F51\u7AD9\u3002\u4E25\u683C\u7684\u6765\u8BF4 Hulu \u5E94\u8BE5\u7B97\u662F\u4E00\u5BB6\u5C0F\u800C\u7F8E\u7684\u516C\u53F8\uFF0C\u4E0D\u80FD\u7B97\u5927\u578B\u4F01\u4E1A\u3002\u4F46\u662F\u56E0\u4E3A Hulu \u5DE5\u8D44\u4E0D\u9519\uFF0C\u6280\u672F\u5F88\u597D\uFF0C\u53E6\u5916\u4E5F\u4E0D\u52A0\u73ED\u3002\u6240\u4EE5 Hulu \u7684 offer \u6BD4\u8BB8\u591A\u5927\u578B\u4F01\u4E1A\u7684 offer \u8FD8\u6709\u8BF1\u60D1\u529B\u3002</p><h4 id="\u5FAE\u8F6F" tabindex="-1"><a class="header-anchor" href="#\u5FAE\u8F6F" aria-hidden="true">#</a> \u5FAE\u8F6F</h4><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-e0dbb967-2bb3-453f-8384-02c1c0aa61a0.png" alt=""></p><p>\u5750\u6807\uFF1A\u79BB\u4E94\u9053\u53E3\u4E5F\u4E0D\u8FDC\u3002</p>',114),s=a("\u4E2A\u4EBA\u8BC4\u4EF7\uFF1A\u5FAE\u8F6F\u7684\u85AA\u8D44\u60C5\u51B5\u548C\u9762\u8BD5\u8003\u5BDF\u91CD\u70B9\u7B49\u5728\u4ECB\u7ECD\u82CF\u5DDE\u65F6\u5DF2\u7ECF\u8BE6\u7EC6\u4ECB\u7ECD\u8FC7\u4E86\uFF0C\u5C31\u4E0D\u5728\u91CD\u590D\u4ECB\u7ECD\u4E86\uFF0C\u5927\u5BB6\u611F\u5174\u8DA3\u7684\u53EF\u4EE5\u770B"),o={href:"https://mp.weixin.qq.com/s/rM5ZpId7O2OBzFb5sHcjeA",target:"_blank",rel:"noopener noreferrer"},l=a("\u8FD9\u91CC"),g=a("\u3002\u4E0D\u8FC7\u76F8\u6BD4\u5728\u5FAE\u8F6F\u82CF\u5DDE\u5DE5\u4F5C\u800C\u8A00\uFF0C\u5728\u5317\u4EAC\u7684\u623F\u4EF7\u548C\u6D88\u8D39\u60C5\u51B5\u6C34\u5E73\u4E0B\uFF0C\u5FAE\u8F6F\u5317\u4EAC\u7684\u85AA\u8D44\u5C31\u4E0D\u7B97\u592A\u9999\u4E86\u3002\u4EC0\u4E48\uFF1F\u7ED9\u6211 offer \u6211\u53BB\u4E0D\u53BB? \u9A6C\u4E0A\u53BB\uFF01 \u5FAE\u8F6F\u5317\u4EAC\u524D\u4E9B\u5E74\u7684\u843D\u6237\u6307\u6807\u6BD4\u8F83\u591A\uFF0C\u4E0D\u8FC7\u8FD1\u51E0\u5E74\u5FAE\u8F6F\u7684\u843D\u6237\u6307\u6807\u76F8\u5BF9\u5C11\u4E00\u4E9B\u4E86\u3002"),f=p('<h4 id="shoppe-\u867E\u76AE" tabindex="-1"><a class="header-anchor" href="#shoppe-\u867E\u76AE" aria-hidden="true">#</a> Shoppe\uFF08\u867E\u76AE\uFF09</h4><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-ea99812c-fdb6-44a6-bc55-79c15ad37a3a.jpg" alt=""></p><p>\u5750\u6807\uFF1A\u4E94\u9053\u53E3\u9644\u8FD1\uFF0C\u548C\u641C\u72D7\u6328\u7740\u3002\u90A3\u7247\u6709\u597D\u591A\u4E92\u8054\u7F51\u516C\u53F8\u3002</p><p>2022\u6821\u62DB\u85AA\u8D44\uFF1A\u767D\u83DC\u4EF7 22k\uFF0Csp 25k\uFF0Cssp 27k\u3002\u67093\u4E07\u7B7E\u5B57\u8D39\uFF0C\u4EE5\u53CA12\u4E07\u80A1\u7968\u5206\u4E09\u5E74\u53D1\u653E\u3002</p><p>\u4E2A\u4EBA\u8BC4\u4EF7\uFF1A\u4F60\u53EF\u4EE5\u628A\u867E\u76AE\u60F3\u8C61\u6210\u4E1C\u5357\u4E9A\u7684\u6DD8\u5B9D\u3002\u6211\u8FD8\u662F\u6BD4\u8F83\u559C\u6B22\u867E\u76AE\u7684\uFF0C\u85AA\u8D44\u5F88\u9AD8\uFF0C\u6280\u672F\u4E5F\u4E0D\u9519\u3002\u4F46\u662F\u7F51\u4F20\u7684 965 \u662F\u6CA1\u51E0\u4E2A\u7EC4\u80FD\u8FBE\u5230\u7684\uFF0C\u867E\u76AE\u8BF4\u662F\u5916\u4F01\u5176\u5B9E\u548C\u56FD\u5185\u4E92\u8054\u7F51\u516C\u53F8\u98CE\u683C\u5DEE\u4E0D\u592A\u591A\u3002\u8FD1\u51E0\u5E74\u867E\u76AE\u4E5F\u8D8A\u6765\u8D8A\u5377\u4E86\u3002\u867E\u76AE\u5468\u516D\u5E94\u8BE5\u662F\u4E0D\u7528\u52A0\u73ED\uFF0C\u524D\u4E24\u5468\u5468\u516D\u6211\u548C\u6211\u540C\u5B66\u53BB\u8F6C\u4E86\u4E00\u5708\uFF0C\u5927\u95E8\u662F\u9501\u7740\u7684\u3002\u542C\u8BF4\u5468\u5185 7 \u70B9\u5230 10 \u70B9\u4E0B\u73ED\u7684\u7EC4\u90FD\u6709\u3002</p><h4 id="amazon" tabindex="-1"><a class="header-anchor" href="#amazon" aria-hidden="true">#</a> Amazon</h4><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-9a9d93ca-89fa-4b67-a491-d085eb2601d3.png" alt=""></p><p>\u5750\u6807\uFF1A\u671D\u9633\u533A\u8FDC\u6D0B\u56FD\u9645\u4E2D\u5FC3</p><p>2022\u6821\u62DB\u85AA\u8D44\uFF1A\u4E9A\u9A6C\u900A\u7684\u57FA\u7840\u5E74\u85AA\u6211\u770B\u5230\u670930w\u548C34.9w \u4E24\u4E2A\u6863\uFF0C\u914D\u7ED9\u5458\u5DE5\u7684\u80A1\u7968\u4E5F\u6709 23w \u548C 27w \u4E24\u4E2A\u6863\uFF08\u7B2C\u4E00\u5E74\u53D15%\uFF0C\u7B2C\u4E8C\u5E74\u53D115%\uFF0C\u7B2C\u4E09\u5E74\u548C\u7B2C\u56DB\u5E74\u90FD\u662F\u53D140%\uFF09\uFF0C\u7B7E\u5B57\u8D39\u7B2C\u4E00\u5E74\u4F1A\u7ED99.5w\u7684\u7B7E\u5B57\u8D39\uFF0C\u7B2C\u4E8C\u5E74\u8FD8\u4F1A\u7ED96.9w\u7684\u7B7E\u5B57\u8D39\u3002</p><p>\u4E2A\u4EBA\u8BC4\u4EF7\uFF1A\u6700\u8FD1\u51E0\u5E74\u5916\u4F01\u4E0D\u5982\u56FD\u5185\u4E92\u8054\u7F51\u5927\u5382\u5F00\u51FA\u7684\u85AA\u8D44\u9AD8\uFF0C\u4F46\u662F\u5916\u4F01\u7684\u517B\u751F\u4E00\u76F4\u662F\u5927\u5BB6\u5341\u5206\u559C\u6B22\u7684\u3002\u4E9A\u9A6C\u900A\u5728\u5916\u4F01\u4E2D\u7B97\u662F\u6BD4\u8F83\u62A0\u7684\uFF0C\u4E0D\u8FC7\u56E0\u4E3A\u8FD1\u51E0\u5E74\u4E9A\u9A6C\u900A\u80A1\u7968\u6DA8\u7684\u591A\uFF0C\u6240\u4EE5\u7ED9\u4E86\u5458\u5DE5\u80A1\u7968\u540E\u5458\u5DE5\u8FD8\u662F\u5927\u8D5A\u3002\u53E6\u5916\u6709\u4E2A\u7F3A\u70B9\u5C31\u662F\u4E9A\u9A6C\u900A\u5728\u56FD\u5185\u7684\u4E1A\u52A1\u76F8\u5BF9\u6BD4\u8F83\u8FB9\u7F18\uFF0C\u4F46\u662F\u4E9A\u9A6C\u900A\u7684\u5149\u73AF\u5F88\u8000\u773C\uFF0C\u5458\u5DE5\u51FA\u6765\u8FD8\u662F\u5F88\u53D7\u6B22\u8FCE\u7684\u3002</p><h4 id="apple" tabindex="-1"><a class="header-anchor" href="#apple" aria-hidden="true">#</a> Apple</h4><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-ba5e8a95-1cf8-42f9-aacc-3573cd93f19f.png" alt=""></p><p>\u5750\u6807\uFF1A\u671D\u9633\u533A\u5EFA\u56FD\u95E8\u5916\u5927\u8857\u56FD\u8D38\u5927\u53A6</p><p>\u4E2A\u4EBA\u8BC4\u4EF7\uFF1A\u82F9\u679C\u7684\u4FDD\u5BC6\u76F8\u5F53\u7684\u4E25\u683C\uFF0C\u6211\u4E5F\u6CA1\u6709\u5173\u7CFB\u597D\u7684\u5728\u82F9\u679C\u4E0A\u73ED\u7684\u670B\u53CB\uFF0C\u6240\u4EE5\u6211\u4E5F\u6CA1\u627E\u5230\u82F9\u679C\u4ECA\u5E74\u6821\u62DB\u7684\u85AA\u8D44\u662F\u591A\u5C11\u3002\u82F9\u679C\u5317\u4EAC\u7684\u4E1A\u52A1\u6BD4\u8F83\u8FB9\u7F18\uFF0C\u5C97\u4F4D\u57FA\u672C\u90FD\u662F\u505A\u529F\u80FD\u672C\u571F\u5316\u7684\u5DE5\u4F5C\u3002\u5DE5\u4F5C\u65F6\u95F4\u662F\u53BB\u6389\u5348\u4F11\u540E\u6EE1 8 \u5C0F\u65F6\u5C31\u53EF\u4EE5\u3002</p><h4 id="airbnb" tabindex="-1"><a class="header-anchor" href="#airbnb" aria-hidden="true">#</a> Airbnb</h4><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-b9d6ef38-e7c1-4e00-8409-2f63489a5d6c.png" alt=""></p><p>\u5750\u6807:\u671D\u9633\u533A\u73AF\u7403\u91D1\u878D\u4E2D\u5FC3</p><p>2022\u6821\u62DB\u85AA\u8D44\uFF1A\u57FA\u7840\u5E74\u85AA35w\uFF0C\u989D\u5916\u57FA\u7840\u85AA\u8D44 15% \u7684\u5956\u91D1\uFF0C8w \u7F8E\u5143\u80A1\u7968\u5206 4 \u5E74\u53D1\u653E\u3002</p><p>\u4E2A\u4EBA\u8BC4\u4EF7\uFF1A\u7231\u5F7C\u8FCE\u4F18\u52BF\u662F wlb\uFF08\u5DE5\u4F5C\u751F\u6D3B\u5E73\u8861\uFF09\uFF0C\u4E14\u85AA\u8D44\u4E5F\u5F88\u4E0D\u9519\uFF0C\u8FD9\u4E2A\u80A1\u7968\u592A\u6709\u8BF1\u60D1\u529B\u4E86\u3002 \u5F53\u7136\u7F3A\u70B9\u4E5F\u662F\u6709\u7684\uFF0C\u8FD9\u91CC\u5F15\u7528\u8109\u8109\u4E0A\u4E00\u4E2A Airbnb \u804C\u5DE5\u7684\u533F\u540D\u8BC4\u8BBA\u201CAirbnb\u5355\u7EAF\u505A\u9879\u76EE\u57FA\u672C\u5B66\u4E0D\u5230\u5565\u6280\u672F \u3001\u6846\u67B6\u5C01\u88C5\u7684\u592A\u5B8C\u5584\u4E14\u90FD\u662F\u4E1A\u52A1\u3002\u81EA\u5B66\u80FD\u529B\u5F3A\u7684\u8BDD\u53EF\u4EE5\u6765\uFF0C\u5982\u679C\u60F3\u5355\u7EAF\u9760\u505A\u9879\u76EE\u63D0\u5347\u80FD\u529B\u5C31\u9700\u8981\u614E\u91CD\u4E86\u201D\u3002\u6211\u611F\u89C9\u8FD9\u4E2A\u633A\u9002\u5408\u6211\u7684\u54E6~ \u4E0A\u73ED\u5E72\u6D3B\uFF0C\u516D\u70B9\u4E0B\u73ED\u518D\u5199\u5199\u6587\u7AE0\uFF0C\u5B8C\u7F8E\u3002</p><p>\u597D\u4E86\uFF0C\u8BE6\u7EC6\u4ECB\u7ECD\u7684\u5C31\u8FD9\u4E48\u591A\u4E86\u3002\u53E6\u5916\u8C37\u6B4C\u7531\u4E8E\u5728\u56FD\u5185\u62DB\u7684\u4EBA\u5341\u5206\u7684\u5C11\uFF0C\u6211\u4E5F\u6CA1\u6709\u5728\u8C37\u6B4C\u4E0A\u73ED\u7684\u5927\u795E\u670B\u53CB\uFF0C\u6240\u4EE5\u8C37\u6B4C\u7684\u4FE1\u606F\u6211\u5C31\u4E0D\u77E5\u9053\u4E86\u3002Paypal \u6211\u627E\u5230\u7684\u4FE1\u606F\u4E5F\u6709\u70B9\u5C11\uFF0C\u4E5F\u4E0D\u5C55\u5F00\u4ECB\u7ECD\u4E86\uFF0C\u8C8C\u4F3C PayPal \u5728\u4E0A\u6D77\u90E8\u95E8\u6BD4\u8F83\u9F50\u5168\uFF0C\u5317\u4EAC\u8FD9\u8FB9\u5DE5\u4F5C\u5730\u70B9\u6211\u6700\u521D\u90FD\u6CA1\u641C\u5230\uFF0C\u8FD8\u662F\u6839\u636E\u670B\u53CB\u5708\u4E00\u4E2A\u670B\u53CB\u63D0\u9192\u5728 boss \u4E0A\u627E\u5230\u7684\uFF0C\u5728\u671D\u9633\u533A\u91D1\u5730\u4E2D\u5FC3\u3002</p><h2 id="\u751F\u6D3B\u6210\u672C" tabindex="-1"><a class="header-anchor" href="#\u751F\u6D3B\u6210\u672C" aria-hidden="true">#</a> \u751F\u6D3B\u6210\u672C</h2><p>\u5728\u5317\u4EAC\u7684\u751F\u6D3B\u5C31\u4EC1\u8005\u89C1\u4EC1\u667A\u8005\u89C1\u667A\u4E86\uFF0C\u6709\u7684\u4EBA\u559C\u6B22\u4ED6\u7684\u7E41\u534E\u4E0E\u673A\u9047\uFF0C\u6709\u7684\u4EBA\u8BA8\u538C\u4ED6\u7684\u62E5\u6324\u4E0E\u538B\u529B\u3002</p><h3 id="\u623F\u4EF7" tabindex="-1"><a class="header-anchor" href="#\u623F\u4EF7" aria-hidden="true">#</a> \u623F\u4EF7</h3><p>\u4E70\u623F\u7684\u4E8B\u5F80\u540E\u7A0D\u7A0D\uFF0C\u54B1\u4EEC\u5148\u8BF4\u79DF\u623F\u7684\u4E8B\u3002\u6CE8\u610F\u554A\uFF0C\u6211\u4E0B\u9762\u8BF4\u7684\u4E0A\u73ED\u65B9\u4FBF\u57FA\u672C\u4E0A\u5C31\u662F\u51FA\u95E8\u540E\u4E00\u4E2A\u5C0F\u65F6\u5185\u5230\u516C\u53F8\u5440\uFF01\u6765\u4E86\u5317\u4EAC\u540E\u5927\u6982\u7387\u4E8B\u8981\u548C\u4EBA\u5408\u79DF\u4E86\uFF0C\u50CF\u4E0A\u9762\u8BF4\u7684\u5728\u817E\u8BAF\u767E\u5EA6\u7B49\u897F\u4E8C\u65D7\u8FD9\u7247\u533A\u57DF\u4E0A\u73ED\u7684\uFF0C\u5927\u591A\u6570\u9009\u62E9\u5728\u56DE\u9F99\u89C2\u8FD9\u5757\u548C\u4EBA\u5408\u79DF\uFF0C\u76F8\u5BF9\u4FBF\u5B9C\u4E14\u6709\u5730\u94C1\u7AD9\u4E0A\u73ED\u6BD4\u8F83\u65B9\u4FBF\u3002\u5728\u56DE\u9F99\u89C2\u8FD9\u5757\u79DF\u4E00\u4E2A 10 \u6765\u5E73\u7684\u5367\u5BA4\u5927\u7EA6 2500 \u5DE6\u53F3\u5427\u3002 \u5728\u4E94\u9053\u53E3\u90A3\u7247\u4E0A\u73ED\u548C\u671B\u4EAC\u90A3\u7247\u4E0A\u73ED\u7684\u5728\u9644\u8FD1\u79DF\u623F\u8981\u66F4\u8D35\u70B9\uFF0C\u79DF\u4E00\u4E2A 10 \u6765\u5E73\u7684\u5367\u5BA4\u5927\u6982\u6BCF\u6708\u8981\u82B1 3000+\u3002\u5F53\u7136\u5728\u671B\u4EAC\u4E0A\u73ED\u53EF\u4EE5\u6CBF\u774014\u53F7\u7EBF\u79DF\u7684\u8FDC\u70B9\uFF0C\u79DF\u91D1\u4F1A\u4FBF\u5B9C\u70B9\uFF0C\u4E0A\u73ED\u76F4\u63A5\u5750\u7740\u5730\u94C1\u8FC7\u6765\u4E5F\u8FD8\u633A\u65B9\u4FBF\u3002\u5728\u4EA6\u5E84\u90A3\u8FB9\u4E0A\u73ED\u7684\u79DF\u623F\u4F1A\u76F8\u5BF9\u4FBF\u5B9C\u70B9\uFF0C2000\u591A\u70B9\u57FA\u672C\u53EF\u4EE5\u3002\u60F3\u8981\u4E00\u4E2A\u4F4F\u4E14\u5728\u4E0A\u8FF0\u516C\u53F8\u4E0A\u73ED\u65B9\u4FBF\uFF0C\u79DF\u4E00\u4E2A30\u5E73\u5DE6\u53F3\u7684\u4E00\u5C45\u5BA4\u57FA\u672C\u6700\u4F4E\u6BCF\u6708\u90FD\u8981 5000 \u4EE5\u4E0A\u4E86\u3002</p><p>\u53E6\u5916\u5927\u5BB6\u8FD8\u53EF\u4EE5\u7785\u7740\u70B9\u516C\u79DF\u623F\uFF0C\u79DF\u91D1\u4F1A\u6BD4\u8F83\u4FBF\u5B9C\uFF0C\u5355\u79DF\u4E00\u95F4 40 \u5E73\u7684\u623F\u5B50\u4E5F\u5C31\u4E0D\u5230 3000\uFF0C\u53EA\u662F\u9650\u5236\u4F1A\u6BD4\u8F83\u591A\u3002\u90E8\u5206\u516C\u53F8\u4F1A\u6709\u516C\u79DF\u623F\u540D\u989D\uFF0C\u6211\u8BB0\u5F97\u5EA6\u5C0F\u6EE1\u5C31\u80FD\u534F\u52A9\u804C\u5DE5\u7533\u8BF7\u516C\u79DF\u623F\u3002\u7533\u8BF7\u4E00\u5C45\u5BA4\u7684\u4F1A\u5BB9\u6613\u70B9\uFF0C\u4E24\u5C45\u5BA4\u7684\u96BE\u7533\u8BF7\u3002</p><p>\u4E0B\u9762\u5C31\u8BF4\u4E70\u623F\u7684\u4E8B\u4E86\uFF0C\u7B97\u4E86\uFF0C\u6211\u5BF9\u5317\u4EAC\u4E70\u623F\u7684\u4E8B\u4E5F\u6CA1\u4EC0\u4E48\u89C1\u89E3\u3002\u8D34\u4E2A\u56FE\u4F60\u4EEC\u81EA\u5DF1\u770B\u5427\uFF0C\u6570\u636E\u4E0D\u4E00\u5B9A\u51C6\uFF0C\u5C31\u611F\u53D7\u4E0B\u623F\u4EF7\u6709\u591A\u9AD8\u5427....\u5BC6\u4E91\u5EF6\u5E86\u4EC0\u4E48\u7684\u5C31\u592A\u8FDC\u4E86\uFF0C\u5F53\u7136\u6709\u5F88\u591A\u4EBA\u5728\u5317\u4EAC\u4E0A\u73ED\u5728\u5929\u6D25\u4E70\u623F\u6216\u8005\u5ECA\u574A\u4E70\u623F\u7684\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-e5bc2cf6-647d-43f9-9352-934440d71b16.png" alt=""></p><h3 id="\u7F8E\u98DF" tabindex="-1"><a class="header-anchor" href="#\u7F8E\u98DF" aria-hidden="true">#</a> \u7F8E\u98DF</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-148db131-6c78-4cbf-86a0-465d88fdd217.png" alt=""></p><p>\u6709\u4E00\u53E5\u8BDD\u53EB\u201C\u4EAC\u57CE\u65E0\u7F8E\u98DF\u201D\u3002\u867D\u7136\u8FD9\u53E5\u8BDD\u6709\u70B9\u6781\u7AEF\u4F46\u662F\u4E5F\u6709\u70B9\u9053\u7406\u7684\u3002\u7F8E\u98DF\u7684\u805A\u96C6\u5730\u5927\u90E8\u5206\u662F\u6CBF\u5C71\u6CBF\u6D77\u6CBF\u6CB3\u6CBF\u6C5F\u7684\u5730\u65B9\uFF0C\u5317\u4EAC\u4E00\u76F4\u4E0D\u662F\u4E00\u4E2A\u7F8E\u98DF\u539F\u6599\u5BCC\u8DB3\u7684\u5730\u65B9\u3002\u5317\u4EAC\u5E38\u8BF4\u7684\u5317\u4EAC\u540D\u83DC\u7279\u70B9\u4E0D\u50CF\u9C81\u83DC\u5DDD\u83DC\u6C5F\u82CF\u83DC\u90A3\u6837\u7279\u70B9\u9C9C\u660E\u3002\u6211\u80FD\u60F3\u5230\u7684\u5317\u4EAC\u7279\u8272\u7684\u996D\u4E5F\u5C31\u662F\u70E4\u9E2D\u3001\u6DAE\u7F8A\u8089\u3001\u7206\u809A\u3001\u7092\u809D\u3001\u4EAC\u9171\u8089\u4E1D\u3001\u70B8\u9171\u9762\uFF0C\u9664\u4E86\u8FD9\u4E9B\u8FD8\u771F\u4E0D\u592A\u597D\u60F3\u4E86\u3002\u5728\u5317\u4EAC\u6709\u4E2A\u597D\u5904\u662F\u4F60\u80FD\u5728\u8FD9\u91CC\u5403\u5230\u5168\u56FD\u5404\u5730\u7684\u7F8E\u98DF\uFF0C\u56E0\u4E3A\u5317\u4EAC\u5168\u56FD\u5404\u5730\u751A\u81F3\u4E16\u754C\u5404\u5730\u7684\u4EBA\u90FD\u6709\uFF0C\u6240\u4EE5\u5404\u7701\u5404\u56FD\u98CE\u5473\u7684\u9910\u5385\u90FD\u4F1A\u6709\uFF0C\u4F46\u662F\u611F\u89C9\u98CE\u5473\u4E0A\u8FD8\u662F\u6839\u636E\u5317\u4EAC\u8FD9\u8FB9\u7684\u53E3\u5473\u505A\u4E86\u4E00\u4E9B\u6539\u53D8\u3002</p><p>\u629B\u5F00\u7F8E\u98DF\u8BF4\u4E00\u4E2A\u73B0\u5B9E\u7684\u95EE\u9898\uFF0C\u5C31\u662F\u5403\u996D\u7684\u82B1\u9500\u3002\u4F60\u5728\u5B66\u6821\u65F6\u4E00\u987F\u996D\u4E5F\u5C31\u662F\u5341\u5757\u5DE6\u53F3\u3002\u6765\u5230\u5317\u4EAC\u540E\u5403\u996D\u7684\u82B1\u9500\u57FA\u672C\u4E0A\u8981\u6BD4\u4F60\u5B66\u6821\u7684\u82B1\u9500\u8D35\u4E00\u500D\u5DE6\u53F3\uFF08\u56E0\u4E3A\u8001\u677F\u7684\u623F\u79DF\u4E5F\u4F1A\u644A\u5230\u996D\u7684\u4EF7\u683C\u4E2D\uFF09\u3002\u5982\u679C\u4F60\u516C\u53F8\u6709\u98DF\u5802\u8FD8\u597D\uFF0C\u8981\u662F\u516C\u53F8\u6CA1\u98DF\u5802\u53EA\u80FD\u5403\u5916\u5356\u7684\u8BDD\uFF0C\u81EA\u5DF1\u7684\u8170\u5305\u548C\u80C3\u90FD\u53D7\u4E0D\u4E86\u3002\u8BF4\u5230\u8FD9\u6211\u89C9\u5F97\u6211\u4EE5\u540E\u665A\u996D\u8FD8\u662F\u81EA\u5DF1\u505A\u5427\u3002</p><h3 id="\u6559\u80B2-\u533B\u7597" tabindex="-1"><a class="header-anchor" href="#\u6559\u80B2-\u533B\u7597" aria-hidden="true">#</a> \u6559\u80B2&amp;\u533B\u7597</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-dc5e04dd-8a49-45b2-b96d-e1a17a2405f2.png" alt=""></p><p>\u5317\u4EAC\u7684\u6559\u80B2\u548C\u533B\u7597\u80AF\u5B9A\u5168\u56FD\u9876\u7EA7\u4E86\u3002\u518D\u5F80\u8BE6\u7EC6\u7684\u4ECB\u7ECD\u6211\u89C9\u5F97\u6211\u5199\u4E0D\u51FA\u4EC0\u4E48\u6709\u6DF1\u5EA6\u7684\u4E1C\u897F\u4E86\uFF0C\u5BF9\u4E8E\u6559\u80B2\u548C\u533B\u7597\u6765\u8BF4\uFF0C\u6211\u89C9\u5F97\u6211\u8FD9\u4E2A\u521A\u6BD5\u4E1A\u4E0D\u5230\u4E00\u5E74\u7684\u4EBA\u80AF\u5B9A\u4E0D\u5982\u5728\u5317\u4EAC\u5F85\u4E86\u591A\u5E74\u7684\u5E76\u4E14\u6709\u5B69\u5B50\u7684\u4E86\u89E3\u7684\u591A\u3002\u6211\u53EA\u662F\u77E5\u9053\u867D\u7136\u5317\u4EAC\u7684\u9AD8\u8003\u4F1A\u6BD4\u5176\u5B83\u7701\u4EFD\u5BB9\u6613\u5F88\u591A\uFF0C\u4F46\u5317\u4EAC\u4E00\u8D2F\u5B9E\u884C\u7684\u7D20\u8D28\u6559\u80B2\u5BF9\u4E8E\u5B69\u5B50\u5BB6\u957F\u6765\u8BF4\u4F1A\u5F88\u7D2F\uFF0C\u4ECA\u5929\u966A\u5B69\u5B50\u5B66\u4E2A\u4EA4\u8C0A\u821E\uFF0C\u660E\u5929\u5B66\u4E2A\u9A6C\u672F\uFF0C\u540E\u5929\u5B66\u6821\u5F00\u4E2A\u5BB6\u957F\u8054\u8C0A\u4F1A\u3002\u5BF9\u4E8E 996 \u6216\u8005 995 \u7684\u7A0B\u5E8F\u5458\u5BB6\u957F\u6765\u8BF4\u771F\u7684\u6709\u70B9\u96BE\u9876\uFF0C\u4E0D\u50CF\u6211\u4EEC\u4E0A\u5B66\u65F6\u5F88\u5C11\u53EB\u5BB6\u957F\u4E86\u3002</p><h3 id="\u5A31\u4E50" tabindex="-1"><a class="header-anchor" href="#\u5A31\u4E50" aria-hidden="true">#</a> \u5A31\u4E50</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-58c387f7-575f-4c2f-9702-e62d7b7575dc.png" alt=""></p><p>\u5317\u4EAC\u503C\u5F97\u53BB\u7684\u73A9\u7684\u5730\u65B9\u5F88\u591A\u7684\uFF0C\u5706\u660E\u56ED\u3001\u9890\u548C\u56ED\u3001\u6545\u5BAB\u3001\u9999\u5C71\u3001\u5404\u79CD\u80E1\u540C\u3001\u5404\u79CD\u535A\u7269\u9986\u3001\u5404\u79CD\u8336\u9986\u3002\u542C\u4E2A\u76F8\u58F0\u3001\u542C\u4E2A\u6F14\u5531\u4F1A\uFF0C\u770B\u4E2A\u4F53\u80B2\u6BD4\u8D5B\u90FD\u662F\u4E0D\u9519\u7684\u4F11\u95F2\u65B9\u5F0F\u3002\u53BB\u5404\u79CD\u5546\u573A\u8F6C\u4E00\u8F6C\u4E70\u70B9\u4E1C\u897F\u4E5F\u662F\u4F11\u95F2\u3002\u5F53\u7136\u56E0\u4E3A\u5317\u4EAC\u8FD9\u4E48\u5927\u6240\u4EE5\u5468\u672B\u51FA\u6765\u73A9\u4E00\u8D9F\u4F1A\u7279\u522B\u82B1\u65F6\u95F4\u3002\u5317\u4EAC\u7684\u56FD\u5BB6\u7EA7\u666F\u533A\u7968\u4EF7\u662F\u6BD4\u8F83\u4FBF\u5B9C\u7684\uFF0C\u6211\u8BB0\u5F97\u9890\u548C\u56ED\u95E8\u7968\u4E5F\u5C31\u56DB\u4E94\u5341\uFF0C\u4E0D\u50CF\u5176\u5B83\u5730\u533A\u7684\u666F\u533A\u52A8\u8F84\u597D\u51E0\u767E\u7684\u95E8\u7968\u3002</p>',37),m=a("\u4F5C\u8005\uFF1A\u6731\u664B\u541B\uFF0C\u8F6C\u8F7D\u94FE\u63A5\uFF1A"),j={href:"https://mp.weixin.qq.com/s/xlPZfpd89rDq6L-Me80wnw",target:"_blank",rel:"noopener noreferrer"},v=a("https://mp.weixin.qq.com/s/xlPZfpd89rDq6L-Me80wnw"),u=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png",alt:""})],-1);function k(x,_){const t=c("ExternalLinkIcon");return d(),h("div",null,[n,e("p",null,[s,e("a",o,[l,r(t)]),g]),f,e("blockquote",null,[e("p",null,[m,e("a",j,[v,r(t)])])]),u])}var P=i(b,[["render",k],["__file","beijing.html.vue"]]);export{P as default};
diff --git a/dist/assets/bokeyuan-jianxijavazhongdifangwenquanxiankongzhi.html.95de7e08.js b/dist/assets/bokeyuan-jianxijavazhongdifangwenquanxiankongzhi.html.5212785d.js
similarity index 99%
rename from dist/assets/bokeyuan-jianxijavazhongdifangwenquanxiankongzhi.html.95de7e08.js
rename to dist/assets/bokeyuan-jianxijavazhongdifangwenquanxiankongzhi.html.5212785d.js
index 7d33ec53..235216c3 100644
--- a/dist/assets/bokeyuan-jianxijavazhongdifangwenquanxiankongzhi.html.95de7e08.js
+++ b/dist/assets/bokeyuan-jianxijavazhongdifangwenquanxiankongzhi.html.5212785d.js
@@ -1,4 +1,4 @@
-import{_ as a}from"./plugin-vue_export-helper.21dcd24c.js";import{r as l,o as s,c as d,a as e,b as t,e as v,d as n}from"./app.a0271b9c.js";const r={},c=v(`<p>\u6211\u4EEC\u5148\u6765\u8BA8\u8BBA\u4E00\u4E0B\u4E3A\u4EC0\u4E48\u9700\u8981\u8BBF\u95EE\u6743\u9650\u63A7\u5236\u3002\u8003\u8651\u4E24\u4E2A\u573A\u666F\uFF1A</p><p>\u573A\u666F 1\uFF1A\u5DE5\u7A0B\u5E08 A \u7F16\u5199\u4E86\u4E00\u4E2A\u7C7B ClassA\uFF0C\u4F46\u662F\u5DE5\u7A0B\u5E08 A \u5E76\u4E0D\u5E0C\u671B ClassA \u88AB\u5176\u4ED6\u7C7B\u90FD\u8BBF\u95EE\u5230\uFF0C\u8BE5\u5982\u4F55\u5904\u7406\u5462\uFF1F</p><p>\u573A\u666F 2\uFF1A\u5DE5\u7A0B\u5E08 A \u7F16\u5199\u4E86\u4E00\u4E2A\u7C7B ClassA\uFF0C\u5176\u4E2D\u6709\u4E24\u4E2A\u65B9\u6CD5 fun1\u3001fun2\uFF0C\u5DE5\u7A0B\u5E08\u53EA\u60F3\u8BA9 fun1 \u5BF9\u5916\u53EF\u89C1\uFF0C\u4E5F\u5C31\u662F\u8BF4\uFF0C\u5982\u679C\u522B\u7684\u5DE5\u7A0B\u5E08\u6765\u8C03\u7528 ClassA\uFF0C\u53EA\u53EF\u4EE5\u8C03\u7528\u65B9\u6CD5 fun1\uFF0C\u8BE5\u600E\u4E48\u5904\u7406\u5462\uFF1F</p><p>\u6B64\u65F6\uFF0C\u8BBF\u95EE\u6743\u9650\u63A7\u5236\u4FBF\u53EF\u4EE5\u8D77\u5230\u4F5C\u7528\u4E86\u3002</p><p>\u5728 Java \u4E2D\uFF0C\u63D0\u4F9B\u4E86\u56DB\u79CD\u8BBF\u95EE\u6743\u9650\u63A7\u5236\uFF1A</p><ul><li>\u9ED8\u8BA4\u8BBF\u95EE\u6743\u9650\uFF08\u5305\u8BBF\u95EE\u6743\u9650\uFF09</li><li>public</li><li>private</li><li>protected</li></ul><p>\u7C7B\u53EA\u53EF\u4EE5\u7528\u9ED8\u8BA4\u8BBF\u95EE\u6743\u9650\u548C public \u4FEE\u9970\u3002\u6BD4\u5982\u8BF4\uFF1A</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>public class Wanger{}
+import{_ as a}from"./plugin-vue_export-helper.21dcd24c.js";import{r as l,o as s,c as d,a as e,b as t,e as v,d as n}from"./app.615e41d8.js";const r={},c=v(`<p>\u6211\u4EEC\u5148\u6765\u8BA8\u8BBA\u4E00\u4E0B\u4E3A\u4EC0\u4E48\u9700\u8981\u8BBF\u95EE\u6743\u9650\u63A7\u5236\u3002\u8003\u8651\u4E24\u4E2A\u573A\u666F\uFF1A</p><p>\u573A\u666F 1\uFF1A\u5DE5\u7A0B\u5E08 A \u7F16\u5199\u4E86\u4E00\u4E2A\u7C7B ClassA\uFF0C\u4F46\u662F\u5DE5\u7A0B\u5E08 A \u5E76\u4E0D\u5E0C\u671B ClassA \u88AB\u5176\u4ED6\u7C7B\u90FD\u8BBF\u95EE\u5230\uFF0C\u8BE5\u5982\u4F55\u5904\u7406\u5462\uFF1F</p><p>\u573A\u666F 2\uFF1A\u5DE5\u7A0B\u5E08 A \u7F16\u5199\u4E86\u4E00\u4E2A\u7C7B ClassA\uFF0C\u5176\u4E2D\u6709\u4E24\u4E2A\u65B9\u6CD5 fun1\u3001fun2\uFF0C\u5DE5\u7A0B\u5E08\u53EA\u60F3\u8BA9 fun1 \u5BF9\u5916\u53EF\u89C1\uFF0C\u4E5F\u5C31\u662F\u8BF4\uFF0C\u5982\u679C\u522B\u7684\u5DE5\u7A0B\u5E08\u6765\u8C03\u7528 ClassA\uFF0C\u53EA\u53EF\u4EE5\u8C03\u7528\u65B9\u6CD5 fun1\uFF0C\u8BE5\u600E\u4E48\u5904\u7406\u5462\uFF1F</p><p>\u6B64\u65F6\uFF0C\u8BBF\u95EE\u6743\u9650\u63A7\u5236\u4FBF\u53EF\u4EE5\u8D77\u5230\u4F5C\u7528\u4E86\u3002</p><p>\u5728 Java \u4E2D\uFF0C\u63D0\u4F9B\u4E86\u56DB\u79CD\u8BBF\u95EE\u6743\u9650\u63A7\u5236\uFF1A</p><ul><li>\u9ED8\u8BA4\u8BBF\u95EE\u6743\u9650\uFF08\u5305\u8BBF\u95EE\u6743\u9650\uFF09</li><li>public</li><li>private</li><li>protected</li></ul><p>\u7C7B\u53EA\u53EF\u4EE5\u7528\u9ED8\u8BA4\u8BBF\u95EE\u6743\u9650\u548C public \u4FEE\u9970\u3002\u6BD4\u5982\u8BF4\uFF1A</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>public class Wanger{}
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>\u6216\u8005</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>class Wanger{}
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>\u4F46\u53D8\u91CF\u548C\u65B9\u6CD5\u5219\u90FD\u53EF\u4EE5\u4FEE\u9970\u3002</p><h2 id="_1-\u4FEE\u9970\u7C7B" tabindex="-1"><a class="header-anchor" href="#_1-\u4FEE\u9970\u7C7B" aria-hidden="true">#</a> 1.\u4FEE\u9970\u7C7B</h2><ul><li>\u9ED8\u8BA4\u8BBF\u95EE\u6743\u9650\uFF08\u5305\u8BBF\u95EE\u6743\u9650\uFF09\uFF1A\u7528\u6765\u4FEE\u9970\u7C7B\u7684\u8BDD\uFF0C\u8868\u793A\u8BE5\u7C7B\u53EA\u5BF9\u540C\u4E00\u4E2A\u5305\u4E2D\u7684\u5176\u4ED6\u7C7B\u53EF\u89C1\u3002</li><li>public\uFF1A\u7528\u6765\u4FEE\u9970\u7C7B\u7684\u8BDD\uFF0C\u8868\u793A\u8BE5\u7C7B\u5BF9\u5176\u4ED6\u6240\u6709\u7684\u7C7B\u90FD\u53EF\u89C1\u3002</li></ul><p>\u4F8B 1\uFF1A</p><p>Main.java:</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>package com.tobetterjavaer.test1;
 
diff --git a/dist/assets/bokeyuan-ruhegaoxiaodixuexijishu.html.b64706b8.js b/dist/assets/bokeyuan-ruhegaoxiaodixuexijishu.html.e50696a0.js
similarity index 99%
rename from dist/assets/bokeyuan-ruhegaoxiaodixuexijishu.html.b64706b8.js
rename to dist/assets/bokeyuan-ruhegaoxiaodixuexijishu.html.e50696a0.js
index 2b0d6859..7741b8ad 100644
--- a/dist/assets/bokeyuan-ruhegaoxiaodixuexijishu.html.b64706b8.js
+++ b/dist/assets/bokeyuan-ruhegaoxiaodixuexijishu.html.e50696a0.js
@@ -1 +1 @@
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id="\u54F2\u5B66" tabindex="-1"><a class="header-anchor" href="#\u54F2\u5B66" aria-hidden="true">#</a> 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noreferrer"},u=a("\u300A\u4EBA\u6708\u795E\u8BDD\u300B"),b=a("\u3002\u4E3E\u4E2A\u4F8B\u5B50\uFF0C\u5F53\u8F6F\u4EF6\u7CFB\u7EDF\u9047\u5230\u6027\u80FD\u95EE\u9898\uFF0C\u5C1D\u8BD5\u4E0B\u9762\u4E24\u79CD\u54F2\u5B66\u601D\u60F3\u63D0\u5347\u6027\u80FD\uFF1A"),f=t('<ul><li>\u7A7A\u95F4\u6362\u65F6\u95F4\uFF1A\u6BD4\u5982\u5F15\u5165\u7F13\u5B58\uFF0C\u6D88\u8017\u989D\u5916\u7684\u5B58\u50A8\u63D0\u9AD8\u54CD\u5E94\u901F\u5EA6\u3002</li><li>\u65F6\u95F4\u6362\u7A7A\u95F4\uFF1A\u6BD4\u5982\u5927\u6587\u4EF6\u7684\u5206\u7247\u5904\u7406\uFF0C\u5206\u6BB5\u5904\u7406\u540E\u518D\u6C47\u603B\u7ED3\u679C\u3002</li></ul><p>\u8BBE\u8BA1\u7A33\u5065\u9AD8\u53EF\u7528\u7684\u7CFB\u7EDF\uFF0C\u5C1D\u8BD5\u4ECE\u4E09\u4E2A\u65B9\u9762\u8003\u8651\u95EE\u9898\uFF1A</p><ul><li>\u5B58\u50A8\uFF1A\u6570\u636E\u4F1A\u4E22\u5931\u5417\uFF0C\u6570\u636E\u4E00\u81F4\u6027\u600E\u4E48\u89E3\u51B3\u3002</li><li>\u8BA1\u7B97\uFF1A\u8BA1\u7B97\u600E\u4E48\u6269\u5BB9\uFF0C\u5E94\u7528\u5141\u8BB8\u4EFB\u610F\u589E\u52A0\u8282\u70B9\u5417\u3002</li><li>\u4F20\u8F93\uFF1A\u7F51\u7EDC\u4E2D\u65AD\u6216\u62E5\u585E\u600E\u4E48\u529E\u3002</li></ul><p>\u4ECE\u65E0\u6570\u7684\u5931\u8D25\u6216\u8005\u6210\u529F\u7684\u7ECF\u9A8C\u4E2D\uFF0C\u603B\u7ED3\u51FA\u9AD8\u5EA6\u6982\u62EC\u6027\u7684\u65B9\u6848\uFF0C\u8BA9\u6211\u4EEC\u4E0B\u4E00\u6B65\u505A\u7684\u66F4\u597D\u3002</p><h4 id="\u82F1\u8BED" tabindex="-1"><a class="header-anchor" href="#\u82F1\u8BED" aria-hidden="true">#</a> \u82F1\u8BED</h4><p>\u82F1\u8BED\u662F\u6781\u4E3A\u91CD\u8981\u7684\u57FA\u7840\uFF0C\u5B66\u597D\u82F1\u8BED\u4E0E\u638C\u63E1\u7F16\u7A0B\u8BED\u8A00\u4E00\u6837\u91CD\u8981\u3002\u4E14\u4E0D\u8BF4\u5916\u4F01\u5BF9\u82F1\u8BED\u7684\u8981\u6C42\uFF0C\u8BB8\u591A\u77E5\u540D\u535A\u5BA2\u5C31\u662F\u628A\u82F1\u6587\u7FFB\u8BD1\u6210\u4E2D\u6587\uFF0C\u5145\u5F53\u77E5\u8BC6\u7684\u642C\u8FD0\u5DE5\u3002\u5982\u679C\u82F1\u8BED\u8DB3\u591F\u597D\uFF0C\u76F4\u63A5\u9605\u8BFB\u4E00\u624B\u82F1\u8BED\u8D44\u6599\uFF0C\u907F\u514D\u4ED6\u4EBA\u7FFB\u8BD1\u5B58\u5728\u7684\u8C2C\u8BEF\u3002</p><h3 id="\u600E\u4E48\u5B66" tabindex="-1"><a class="header-anchor" href="#\u600E\u4E48\u5B66" aria-hidden="true">#</a> \u600E\u4E48\u5B66</h3><h4 id="\u77E5\u8BC6\u4F53\u7CFB" tabindex="-1"><a class="header-anchor" href="#\u77E5\u8BC6\u4F53\u7CFB" aria-hidden="true">#</a> \u77E5\u8BC6\u4F53\u7CFB</h4><p>\u4F53\u7CFB\u5316\u7684\u77E5\u8BC6\u6BD4\u96F6\u6563\u7684\u66F4\u5BB9\u6613\u8BB0\u5FC6\u548C\u7406\u89E3\uFF0C\u8FD9\u6B63\u5982\u4E00\u90E8\u597D\u7684\u7535\u89C6\u5267\uFF0C\u5267\u60C5\u73AF\u73AF\u76F8\u6263\u624D\u80FD\u5438\u5F15\u89C2\u4F17\u3002\u5EFA\u8BAE\u5927\u5BB6\u4F7F\u7528\u601D\u7EF4\u5BFC\u56FE\u7F57\u5217\u77E5\u8BC6\u70B9\uFF0C\u6784\u5EFA\u4F53\u7CFB\u7ED3\u6784\uFF0C\u5982\u4E0B\u56FE\u6240\u793A\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/bokeyuan-ruhegaoxiaodixuexijishu-b27d5dbf-66ca-45fa-b1a4-f0a3ba0a346b.png" alt=""></p><h4 id="\u514B\u670D\u9057\u5FD8" tabindex="-1"><a class="header-anchor" href="#\u514B\u670D\u9057\u5FD8" aria-hidden="true">#</a> \u514B\u670D\u9057\u5FD8</h4><p>\u9AD8\u4E2D\u662F\u6211\u4EEC\u77E5\u8BC6\u7684\u5DC5\u5CF0\u65F6\u523B\uFF0C\u6BCF\u5468\u5C0F\u8003\u6BCF\u6708\u5927\u8003\uFF0C\u6559\u8F85\u8D44\u6599\u5806\u6210\u5C71\uFF0C\u5730\u72F1\u5F0F\u7684\u53CD\u590D\u64CD\u7EC3\u5F3A\u5316\u8BB0\u5FC6\u3002\u590D\u4E60\u662F\u5BF9\u6297\u9057\u5FD8\u7684\u552F\u4E00\u529E\u6CD5\u3002\u5927\u8111\u7684\u9057\u5FD8\u662F\u6709\u89C4\u5F8B\u7684\uFF0C\u5148\u5FEB\u540E\u6162\u3002\u4E00\u5929\u540E\uFF0C\u5B66\u5230\u7684\u77E5\u8BC6\u53EA\u5269\u4E0B\u539F\u6765\u768425%\uFF0C\u751A\u81F3\u66F4\u4F4E\u3002\u968F\u7740\u65F6\u95F4\u7684\u63A8\u79FB\uFF0C\u9057\u5FD8\u7684\u901F\u5EA6\u51CF\u6162\uFF0C\u9057\u5FD8\u7684\u6570\u91CF\u4E5F\u5C31\u51CF\u5C11\u3002</p><table><thead><tr><th>\u65F6\u95F4\u95F4\u9694</th><th>\u8BB0\u5FC6\u91CF</th></tr></thead><tbody><tr><td>\u521A\u770B\u5B8C</td><td>100%</td></tr><tr><td>20\u5206\u949F\u540E</td><td>60%</td></tr><tr><td>1\u5C0F\u65F6\u540E</td><td>40%</td></tr><tr><td>1\u5929\u540E</td><td>30%</td></tr><tr><td>2\u5929\u540E</td><td>27%</td></tr></tbody></table><p>\u6BCF\u4E2A\u4EBA\u7684\u9057\u5FD8\u7A0B\u5EA6\u90FD\u4E0D\u4E00\u6837\uFF0C\u5EFA\u8BAE\u7B2C\u4E8C\u5929\u590D\u4E60\u524D\u4E00\u5929\u7684\u5185\u5BB9\uFF0C\u4E03\u5929\u540E\u590D\u4E60\u8FD9\u6BB5\u65F6\u95F4\u7684\u6240\u6709\u5185\u5BB9\u3002</p><h4 id="\u788E\u7247\u65F6\u95F4" tabindex="-1"><a class="header-anchor" href="#\u788E\u7247\u65F6\u95F4" aria-hidden="true">#</a> \u788E\u7247\u65F6\u95F4</h4><p>\u4E0D\u5C11\u670B\u53CB\u5229\u7528\u788E\u7247\u65F6\u95F4\u5B66\u4E60\uFF0C\u6BD4\u5982\u5728\u516C\u4EA4\u4E0A\u770B\u516C\u4F17\u53F7\u7684\u63A8\u9001\u3002\u5176\u5B9E\u6211\u4EEC\u90FD\u9AD8\u4F30\u4E86\u81EA\u5DF1\u7684\u6297\u5E72\u6270\u80FD\u529B\uFF0C\u5982\u679C\u5904\u5728\u5608\u6742\u7684\u73AF\u5883\uFF0C\u6CE8\u610F\u529B\u5BB9\u6613\u88AB\u6253\u65AD\uFF0C\u8BB0\u5FC6\u7559\u5B58\u5EA6\u4E5F\u5F88\u4F4E\u3002\u788E\u7247\u65F6\u95F4\u9002\u5408\u5B66\u4E60\u7B80\u5355\u5B64\u7ACB\u7684\u77E5\u8BC6\u70B9\uFF0C\u6BD4\u5982\u94FE\u8868\u7684\u5B9A\u4E49\u4E0E\u5B9E\u73B0\u3002</p><p>\u5B66\u4E60\u590D\u6742\u7684\u77E5\u8BC6\uFF0C\u9700\u8981\u5927\u6BB5\u7684\u8FDE\u7EED\u65F6\u95F4\u3002\u56FE\u4E66\u9986\u662F\u4E2A\u597D\u5730\u65B9\uFF0C\u5B89\u9759\u6C1B\u56F4\u597D\u3002\u624B\u673A\u653E\u4E00\u8FB9\uFF0C\u4E0D\u8981\u7406\u4F1AQQ\u5FAE\u4FE1\uFF0C\u6700\u597D\u9605\u8BFB\u7EB8\u8D28\u4E66\uFF0C\u6CE1\u4E0A\u4E00\u6574\u5929\u3002\u6709\u4E9B\u57CE\u5E02\u51FA\u73B0\u4E86\u4ED8\u8D39\u81EA\u4E60\u5BA4\uFF0C\u63D0\u4F9B\u683C\u5B50\u95F4\u3001\u8336\u6C34\u7B49\u7B49\uFF0C\u4E5F\u662F\u975E\u5E38\u597D\u7684\u9009\u62E9\u3002</p><h3 id="\u7528\u8D77\u6765" tabindex="-1"><a class="header-anchor" href="#\u7528\u8D77\u6765" aria-hidden="true">#</a> \u7528\u8D77\u6765</h3><h3 id="\u6280\u672F\u5206\u4EAB" tabindex="-1"><a class="header-anchor" href="#\u6280\u672F\u5206\u4EAB" aria-hidden="true">#</a> \u6280\u672F\u5206\u4EAB</h3><p>\u4ECE\u4E0B\u9762\u8FD9\u5F20\u56FE\u6211\u4EEC\u53EF\u4EE5\u770B\u5230\uFF0C\u6559\u6388\u4ED6\u4EBA\u662F\u77E5\u8BC6\u7559\u5B58\u7387\u6700\u9AD8\u7684\u65B9\u5F0F\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/bokeyuan-ruhegaoxiaodixuexijishu-4a0cd5de-99ba-4837-acb5-61969271f8fc.png" alt=""></p><p>\u51C6\u5907PPT\u548C\u6F14\u8BB2\u5185\u5BB9\uFF0C\u7ED9\u540C\u4E8B\u6765\u4E00\u573A\u6280\u672F\u5206\u4EAB\u3002\u4E0D\u5149\u590D\u4E60\u77E5\u8BC6\uFF0C\u8FD8\u953B\u70BC\u53E3\u624D\u3002\u66FE\u7ECF\u6709\u4E2A\u540C\u4E8B\u8BF4\u8BDD\u53C8\u5FEB\u53C8\u6025\uFF0C\u53E3\u5934\u7985\u4E5F\u591A\uFF0C\u6BD4\u5982&quot;\u5BF9\u5427\u3001\u662F\u4E0D\u662F\u201D\uFF0C\u522B\u4EBA\u7ECF\u5E38\u542C\u4E0D\u6E05\uFF0C\u4F46\u662F\u4ED6\u672C\u4EBA\u4E0D\u4EE5\u4E3A\u7136\u3002\u9886\u5BFC\u8BA9\u4ED6\u505A\u4E86\u51E0\u6B21\u6280\u672F\u5206\u4EAB\uFF0C\u542C\u4F17\u7684\u53CD\u5E94\u53EF\u60F3\u800C\u77E5\uFF0C\u4ED6\u624D\u5F7B\u5E95\u8BA4\u6E05\u7F3A\u70B9\u3002</p><p>\u575A\u6301\u5199\u6280\u672F\u535A\u5BA2\uFF0C\u522B\u5728\u610F\u4F60\u5199\u7684\u4E1C\u897F\u5728\u7F51\u4E0A\u5DF2\u7ECF\u91CD\u590D\u5343\u767E\u904D\u3002\u5F53\u81EA\u5DF1\u52A8\u624B\u7684\u65F6\u5019\uFF0C\u624D\u4F1A\u610F\u8BC6\u5230\u773C\u9AD8\u624B\u4F4E\u3002\u8BA9\u6587\u7AE0\u8BFB\u8D77\u6765\u6D41\u7545\u6E05\u6670\uFF0C\u9700\u8981\u5455\u5FC3\u6CA5\u8840\u7684\u5220\u6539\u3002\u5199\u4F5C\u662F\u5BF9\u5927\u8111\u7684\u957F\u671F\u8003\u9A8C\uFF0C\u60F3\u4E0D\u5230\u80AF\u5B9A\u5199\u4E0D\u51FA\uFF0C\u60F3\u4E0D\u6E05\u695A\u80AF\u5B9A\u5199\u4E0D\u6E05\u695A\u3002</p><h3 id="\u9020\u4E2A\u8F6E\u5B50" tabindex="-1"><a class="header-anchor" href="#\u9020\u4E2A\u8F6E\u5B50" aria-hidden="true">#</a> \u9020\u4E2A\u8F6E\u5B50</h3><p>\u6211\u4EEC\u7ECF\u5E38\u8BF4\u4E0D\u8981\u91CD\u590D\u9020\u8F6E\u5B50\u3002\u4E3A\u4E86\u5F00\u53D1\u6548\u7387\uFF0C\u53EF\u4EE5\u4E0D\u9020\u8F6E\u5B50\uFF0C\u4F46\u662F\u5FC5\u987B\u5177\u5907\u9020\u8F6E\u5B50\u7684\u80FD\u529B\u3002\u5EFA\u8BAE\u9020\u4E00\u4E2A\u7B80\u5355\u7684MQ\uFF0C\u4F60\u80FD\u7528\u5230\u901A\u4FE1\u534F\u8BAE\u3001\u8BBE\u8BA1\u6A21\u5F0F\u3001\u961F\u5217\u7B49\u8BB8\u591A\u77E5\u8BC6\u3002\u5728\u9020\u8F6E\u5B50\u7684\u8FC7\u7A0B\u4E2D\uFF0C\u4F60\u4F1A\u9891\u7E41\u7684\u7FFB\u9605\u5404\u79CD\u624B\u518C\u6216\u8005\u535A\u5BA2\uFF0C\u8FD9\u5C31\u662F<strong>\u7528\u8F93\u51FA\u5012\u903C\u8F93\u5165</strong>\u3002</p>',25);function x(_,g){const i=h("ExternalLinkIcon");return d(),l("div",null,[s,e("p",null,[p,e("a",c,[u,o(i)]),b]),f])}var k=r(n,[["render",x],["__file","bokeyuan-ruhegaoxiaodixuexijishu.html.vue"]]);export{k as default};
+import{_ as r}from"./plugin-vue_export-helper.21dcd24c.js";import{r as h,o as d,c as l,a as e,b as o,e as t,d as a}from"./app.615e41d8.js";const n={},s=t('<ul><li><a href="#what">\u5B66\u4EC0\u4E48</a></li><li><a href="#base">\u57FA\u7840\u4E0E\u5E94\u7528</a></li><li><a href="#wide">\u5E7F\u5EA6\u4E0E\u6DF1\u5EA6</a></li><li><a href="#philosophy">\u54F2\u5B66</a></li><li><a href="#english">\u82F1\u8BED</a></li><li><a href="#how">\u600E\u4E48\u5B66</a></li><li><a href="#system">\u77E5\u8BC6\u4F53\u7CFB</a></li><li><a href="#forget">\u514B\u670D\u9057\u5FD8</a></li><li><a href="#fragment">\u788E\u7247\u65F6\u95F4</a></li><li><a href="#use">\u7528\u8D77\u6765</a></li><li><a href="#share">\u6280\u672F\u5206\u4EAB</a></li><li><a href="#wheel">\u9020\u4E2A\u8F6E\u5B50</a></li></ul><p>\u6211\u4EEC\u76F8\u4FE1\u52AA\u529B\u5B66\u4E60\u4E00\u5B9A\u4F1A\u6709\u6536\u83B7\uFF0C\u4F46\u662F\u65B9\u6CD5\u4E0D\u5F53\uFF0C\u65E2\u8BA9\u4EBA\u8EAB\u5FC3\u75B2\u60EB\uFF0C\u4E5F\u6CA1\u6709\u5207\u5B9E\u7684\u56DE\u62A5\u3002\u9AD8\u4E2D\u65F6\u4EE3\uFF0C\u6211\u7684\u540C\u684C\u662F\u4E2A\u6F02\u4EAE\u5973\u540C\u5B66\u3002\u5979\u7684\u7269\u7406\u6210\u7EE9\u5F88\u5DEE\uFF0C\u867D\u7136\u5979\u975E\u5E38\u52E4\u594B\u7684\u5B66\u4E60\uFF0C\u4F46\u6210\u7EE9\u603B\u662F\u4E0D\u7406\u60F3\u3002\u4E3A\u4E86\u5DE9\u56FA\u7EAF\u6D01\u7684\u540C\u5B66\u5173\u7CFB\uFF0C\u6211\u4EB2\u5BC6\u65E0\u95F4\u5730\u8F85\u5BFC\u5979\u7684\u7269\u7406\uFF0C\u53D1\u73B0<strong>\u5979\u4E0D\u77E5\u9053\u9898\u76EE\u8003\u4EC0\u4E48</strong>\u3002\u6211\u4EEC\u7684\u6559\u79D1\u4E66\u4E0E\u8BD5\u9898\u90FD\u56F4\u7ED5\u7740\u8003\u8BD5\u5927\u7EB2\u5C55\u5F00\uFF0C\u770B\u5230\u4E00\u9053\u9898\uFF0C\u5E94\u8BE5\u5148\u60F3\u60F3\u5B83\u5728\u8003\u54EA\u4E9B\u5B9A\u7406\u548C\u516C\u5F0F\u7684\u8FD0\u7528\u3002</p><p>\u4E0D\u5C11\u670B\u53CB\u6BCF\u5929\u90FD\u9605\u8BFB\u6280\u672F\u6587\u7AE0\uFF0C\u4F46\u662F\u7B2C\u4E8C\u5929\u5C31\u5FD8\u5E72\u51C0\u4E86\u3002\u5DE5\u4F5C\u4E2D\u9886\u5BFC\u548C\u540C\u4E8B\u90FD\u8BA4\u53EF\u4F60\u7684\u6C9F\u901A\u548C\u6280\u672F\u80FD\u529B\uFF0C\u4F46\u662F\u8DF3\u69FD\u9762\u8BD5\u5374\u5C61\u5C61\u78B0\u58C1\u3002\u9762\u8BD5\u5B98\u95EE\u6280\u672F\u65B9\u6848\uFF0C\u660E\u660E\u5FC3\u91CC\u6E05\u695A\uFF0C\u7528\u5634\u8BF4\u51FA\u6765\u5374\u524D\u8A00\u4E0D\u642D\u540E\u8BED\u3002\u9762\u8BD5\u5B98\u518D\u95EE\u5E95\u5C42\u7B97\u6CD5\uFF0C\u4F60\u8BF4\u770B\u8FC7\u4F46\u662F\u5FD8\u8BB0\u4E86\u3002\u4ED6\u4E0D\u5728\u4E4E\u4F60\u770B\u6CA1\u770B\u8FC7\uFF0C\u7B54\u4E0D\u4E0A\u5C31\u662F\u96F6\u5206\u3002\u6B63\u5982\u7537\u5973\u76F8\u4EB2\uFF0C\u7537\u65B9\u8C08\u5410\u6F47\u6D12\u624D\u80FD\u5438\u5F15\u59D1\u5A18\u3002\u53EF\u662F\u7537\u65B9\u7D27\u5F20\u4E86\uFF0C\u5E73\u65F6\u633A\u80FD\u8BF4\uFF0C\u5173\u952E\u65F6\u5019\u5374\u652F\u652F\u543E\u543E\uFF0C\u59D1\u5A18\u5FC5\u7136\u8BA4\u4E3A\u4ED6\u4E0D\u884C\u3002\u4EBA\u751F\u5145\u6EE1\u4E86\u8BB8\u591A\u8003\u8BD5\uFF0C\u6709\u5F62\u7684\u548C\u65E0\u5F62\u7684\uFF0C\u6BCF\u6B21\u8003\u8BD5\u7684\u673A\u4F1A\u53EA\u6709\u4E00\u6B21\u3002</p><p>\u5DE5\u4F5C\u4E94\u5E74\u5341\u5E74\u540E\uFF0C\u522B\u4EBA\u6210\u4E86\u67B6\u6784\u5E08\uFF0C\u81EA\u5DF1\u8FD8\u5728\u57FA\u5C42\u6253\u6EDA\uFF0C\u539F\u56E0\u662F\u4EC0\u4E48\uFF1F\u804C\u573A\u4E0A\u65E0\u6CD5\u6210\u529F\u5347\u8FC1\u7684\u539F\u56E0\u6709\u5F88\u591A\uFF0C\u6CA1\u6709\u6301\u7EED\u5B66\u4E60\u3001\u5B66\u4E60\u6548\u679C\u4E0D\u597D\u3001\u65E0\u6CD5\u901A\u8FC7\u5FC3\u4EEA\u516C\u53F8\u7684\u7684\u9762\u8BD5\uFF0C\u4E00\u5B9A\u662F\u5F88\u91CD\u8981\u7684\u539F\u56E0\u3002</p><p><strong>\u628A\u81EA\u5DF1\u5F53\u6210\u4E00\u53F0\u8BA1\u7B97\u673A\uFF0C\u65E2\u6709\u8F93\u5165\uFF0C\u4E5F\u8981\u6709\u8F93\u51FA\uFF0C\u7528\u8F93\u51FA\u5012\u903C\u8F93\u5165</strong>\u3002</p><h3 id="\u5B66\u4EC0\u4E48" tabindex="-1"><a class="header-anchor" href="#\u5B66\u4EC0\u4E48" aria-hidden="true">#</a> \u5B66\u4EC0\u4E48</h3><h4 id="\u57FA\u7840\u4E0E\u5E94\u7528" tabindex="-1"><a class="header-anchor" href="#\u57FA\u7840\u4E0E\u5E94\u7528" aria-hidden="true">#</a> 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id="\u5E7F\u5EA6\u4E0E\u6DF1\u5EA6" tabindex="-1"><a class="header-anchor" href="#\u5E7F\u5EA6\u4E0E\u6DF1\u5EA6" aria-hidden="true">#</a> 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id="\u54F2\u5B66" tabindex="-1"><a class="header-anchor" href="#\u54F2\u5B66" aria-hidden="true">#</a> 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noreferrer"},u=a("\u300A\u4EBA\u6708\u795E\u8BDD\u300B"),b=a("\u3002\u4E3E\u4E2A\u4F8B\u5B50\uFF0C\u5F53\u8F6F\u4EF6\u7CFB\u7EDF\u9047\u5230\u6027\u80FD\u95EE\u9898\uFF0C\u5C1D\u8BD5\u4E0B\u9762\u4E24\u79CD\u54F2\u5B66\u601D\u60F3\u63D0\u5347\u6027\u80FD\uFF1A"),f=t('<ul><li>\u7A7A\u95F4\u6362\u65F6\u95F4\uFF1A\u6BD4\u5982\u5F15\u5165\u7F13\u5B58\uFF0C\u6D88\u8017\u989D\u5916\u7684\u5B58\u50A8\u63D0\u9AD8\u54CD\u5E94\u901F\u5EA6\u3002</li><li>\u65F6\u95F4\u6362\u7A7A\u95F4\uFF1A\u6BD4\u5982\u5927\u6587\u4EF6\u7684\u5206\u7247\u5904\u7406\uFF0C\u5206\u6BB5\u5904\u7406\u540E\u518D\u6C47\u603B\u7ED3\u679C\u3002</li></ul><p>\u8BBE\u8BA1\u7A33\u5065\u9AD8\u53EF\u7528\u7684\u7CFB\u7EDF\uFF0C\u5C1D\u8BD5\u4ECE\u4E09\u4E2A\u65B9\u9762\u8003\u8651\u95EE\u9898\uFF1A</p><ul><li>\u5B58\u50A8\uFF1A\u6570\u636E\u4F1A\u4E22\u5931\u5417\uFF0C\u6570\u636E\u4E00\u81F4\u6027\u600E\u4E48\u89E3\u51B3\u3002</li><li>\u8BA1\u7B97\uFF1A\u8BA1\u7B97\u600E\u4E48\u6269\u5BB9\uFF0C\u5E94\u7528\u5141\u8BB8\u4EFB\u610F\u589E\u52A0\u8282\u70B9\u5417\u3002</li><li>\u4F20\u8F93\uFF1A\u7F51\u7EDC\u4E2D\u65AD\u6216\u62E5\u585E\u600E\u4E48\u529E\u3002</li></ul><p>\u4ECE\u65E0\u6570\u7684\u5931\u8D25\u6216\u8005\u6210\u529F\u7684\u7ECF\u9A8C\u4E2D\uFF0C\u603B\u7ED3\u51FA\u9AD8\u5EA6\u6982\u62EC\u6027\u7684\u65B9\u6848\uFF0C\u8BA9\u6211\u4EEC\u4E0B\u4E00\u6B65\u505A\u7684\u66F4\u597D\u3002</p><h4 id="\u82F1\u8BED" tabindex="-1"><a class="header-anchor" href="#\u82F1\u8BED" aria-hidden="true">#</a> \u82F1\u8BED</h4><p>\u82F1\u8BED\u662F\u6781\u4E3A\u91CD\u8981\u7684\u57FA\u7840\uFF0C\u5B66\u597D\u82F1\u8BED\u4E0E\u638C\u63E1\u7F16\u7A0B\u8BED\u8A00\u4E00\u6837\u91CD\u8981\u3002\u4E14\u4E0D\u8BF4\u5916\u4F01\u5BF9\u82F1\u8BED\u7684\u8981\u6C42\uFF0C\u8BB8\u591A\u77E5\u540D\u535A\u5BA2\u5C31\u662F\u628A\u82F1\u6587\u7FFB\u8BD1\u6210\u4E2D\u6587\uFF0C\u5145\u5F53\u77E5\u8BC6\u7684\u642C\u8FD0\u5DE5\u3002\u5982\u679C\u82F1\u8BED\u8DB3\u591F\u597D\uFF0C\u76F4\u63A5\u9605\u8BFB\u4E00\u624B\u82F1\u8BED\u8D44\u6599\uFF0C\u907F\u514D\u4ED6\u4EBA\u7FFB\u8BD1\u5B58\u5728\u7684\u8C2C\u8BEF\u3002</p><h3 id="\u600E\u4E48\u5B66" tabindex="-1"><a class="header-anchor" href="#\u600E\u4E48\u5B66" aria-hidden="true">#</a> \u600E\u4E48\u5B66</h3><h4 id="\u77E5\u8BC6\u4F53\u7CFB" tabindex="-1"><a class="header-anchor" href="#\u77E5\u8BC6\u4F53\u7CFB" aria-hidden="true">#</a> \u77E5\u8BC6\u4F53\u7CFB</h4><p>\u4F53\u7CFB\u5316\u7684\u77E5\u8BC6\u6BD4\u96F6\u6563\u7684\u66F4\u5BB9\u6613\u8BB0\u5FC6\u548C\u7406\u89E3\uFF0C\u8FD9\u6B63\u5982\u4E00\u90E8\u597D\u7684\u7535\u89C6\u5267\uFF0C\u5267\u60C5\u73AF\u73AF\u76F8\u6263\u624D\u80FD\u5438\u5F15\u89C2\u4F17\u3002\u5EFA\u8BAE\u5927\u5BB6\u4F7F\u7528\u601D\u7EF4\u5BFC\u56FE\u7F57\u5217\u77E5\u8BC6\u70B9\uFF0C\u6784\u5EFA\u4F53\u7CFB\u7ED3\u6784\uFF0C\u5982\u4E0B\u56FE\u6240\u793A\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/bokeyuan-ruhegaoxiaodixuexijishu-b27d5dbf-66ca-45fa-b1a4-f0a3ba0a346b.png" alt=""></p><h4 id="\u514B\u670D\u9057\u5FD8" tabindex="-1"><a class="header-anchor" href="#\u514B\u670D\u9057\u5FD8" aria-hidden="true">#</a> \u514B\u670D\u9057\u5FD8</h4><p>\u9AD8\u4E2D\u662F\u6211\u4EEC\u77E5\u8BC6\u7684\u5DC5\u5CF0\u65F6\u523B\uFF0C\u6BCF\u5468\u5C0F\u8003\u6BCF\u6708\u5927\u8003\uFF0C\u6559\u8F85\u8D44\u6599\u5806\u6210\u5C71\uFF0C\u5730\u72F1\u5F0F\u7684\u53CD\u590D\u64CD\u7EC3\u5F3A\u5316\u8BB0\u5FC6\u3002\u590D\u4E60\u662F\u5BF9\u6297\u9057\u5FD8\u7684\u552F\u4E00\u529E\u6CD5\u3002\u5927\u8111\u7684\u9057\u5FD8\u662F\u6709\u89C4\u5F8B\u7684\uFF0C\u5148\u5FEB\u540E\u6162\u3002\u4E00\u5929\u540E\uFF0C\u5B66\u5230\u7684\u77E5\u8BC6\u53EA\u5269\u4E0B\u539F\u6765\u768425%\uFF0C\u751A\u81F3\u66F4\u4F4E\u3002\u968F\u7740\u65F6\u95F4\u7684\u63A8\u79FB\uFF0C\u9057\u5FD8\u7684\u901F\u5EA6\u51CF\u6162\uFF0C\u9057\u5FD8\u7684\u6570\u91CF\u4E5F\u5C31\u51CF\u5C11\u3002</p><table><thead><tr><th>\u65F6\u95F4\u95F4\u9694</th><th>\u8BB0\u5FC6\u91CF</th></tr></thead><tbody><tr><td>\u521A\u770B\u5B8C</td><td>100%</td></tr><tr><td>20\u5206\u949F\u540E</td><td>60%</td></tr><tr><td>1\u5C0F\u65F6\u540E</td><td>40%</td></tr><tr><td>1\u5929\u540E</td><td>30%</td></tr><tr><td>2\u5929\u540E</td><td>27%</td></tr></tbody></table><p>\u6BCF\u4E2A\u4EBA\u7684\u9057\u5FD8\u7A0B\u5EA6\u90FD\u4E0D\u4E00\u6837\uFF0C\u5EFA\u8BAE\u7B2C\u4E8C\u5929\u590D\u4E60\u524D\u4E00\u5929\u7684\u5185\u5BB9\uFF0C\u4E03\u5929\u540E\u590D\u4E60\u8FD9\u6BB5\u65F6\u95F4\u7684\u6240\u6709\u5185\u5BB9\u3002</p><h4 id="\u788E\u7247\u65F6\u95F4" tabindex="-1"><a class="header-anchor" href="#\u788E\u7247\u65F6\u95F4" aria-hidden="true">#</a> \u788E\u7247\u65F6\u95F4</h4><p>\u4E0D\u5C11\u670B\u53CB\u5229\u7528\u788E\u7247\u65F6\u95F4\u5B66\u4E60\uFF0C\u6BD4\u5982\u5728\u516C\u4EA4\u4E0A\u770B\u516C\u4F17\u53F7\u7684\u63A8\u9001\u3002\u5176\u5B9E\u6211\u4EEC\u90FD\u9AD8\u4F30\u4E86\u81EA\u5DF1\u7684\u6297\u5E72\u6270\u80FD\u529B\uFF0C\u5982\u679C\u5904\u5728\u5608\u6742\u7684\u73AF\u5883\uFF0C\u6CE8\u610F\u529B\u5BB9\u6613\u88AB\u6253\u65AD\uFF0C\u8BB0\u5FC6\u7559\u5B58\u5EA6\u4E5F\u5F88\u4F4E\u3002\u788E\u7247\u65F6\u95F4\u9002\u5408\u5B66\u4E60\u7B80\u5355\u5B64\u7ACB\u7684\u77E5\u8BC6\u70B9\uFF0C\u6BD4\u5982\u94FE\u8868\u7684\u5B9A\u4E49\u4E0E\u5B9E\u73B0\u3002</p><p>\u5B66\u4E60\u590D\u6742\u7684\u77E5\u8BC6\uFF0C\u9700\u8981\u5927\u6BB5\u7684\u8FDE\u7EED\u65F6\u95F4\u3002\u56FE\u4E66\u9986\u662F\u4E2A\u597D\u5730\u65B9\uFF0C\u5B89\u9759\u6C1B\u56F4\u597D\u3002\u624B\u673A\u653E\u4E00\u8FB9\uFF0C\u4E0D\u8981\u7406\u4F1AQQ\u5FAE\u4FE1\uFF0C\u6700\u597D\u9605\u8BFB\u7EB8\u8D28\u4E66\uFF0C\u6CE1\u4E0A\u4E00\u6574\u5929\u3002\u6709\u4E9B\u57CE\u5E02\u51FA\u73B0\u4E86\u4ED8\u8D39\u81EA\u4E60\u5BA4\uFF0C\u63D0\u4F9B\u683C\u5B50\u95F4\u3001\u8336\u6C34\u7B49\u7B49\uFF0C\u4E5F\u662F\u975E\u5E38\u597D\u7684\u9009\u62E9\u3002</p><h3 id="\u7528\u8D77\u6765" tabindex="-1"><a class="header-anchor" href="#\u7528\u8D77\u6765" aria-hidden="true">#</a> \u7528\u8D77\u6765</h3><h3 id="\u6280\u672F\u5206\u4EAB" tabindex="-1"><a class="header-anchor" href="#\u6280\u672F\u5206\u4EAB" aria-hidden="true">#</a> \u6280\u672F\u5206\u4EAB</h3><p>\u4ECE\u4E0B\u9762\u8FD9\u5F20\u56FE\u6211\u4EEC\u53EF\u4EE5\u770B\u5230\uFF0C\u6559\u6388\u4ED6\u4EBA\u662F\u77E5\u8BC6\u7559\u5B58\u7387\u6700\u9AD8\u7684\u65B9\u5F0F\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/bokeyuan-ruhegaoxiaodixuexijishu-4a0cd5de-99ba-4837-acb5-61969271f8fc.png" alt=""></p><p>\u51C6\u5907PPT\u548C\u6F14\u8BB2\u5185\u5BB9\uFF0C\u7ED9\u540C\u4E8B\u6765\u4E00\u573A\u6280\u672F\u5206\u4EAB\u3002\u4E0D\u5149\u590D\u4E60\u77E5\u8BC6\uFF0C\u8FD8\u953B\u70BC\u53E3\u624D\u3002\u66FE\u7ECF\u6709\u4E2A\u540C\u4E8B\u8BF4\u8BDD\u53C8\u5FEB\u53C8\u6025\uFF0C\u53E3\u5934\u7985\u4E5F\u591A\uFF0C\u6BD4\u5982&quot;\u5BF9\u5427\u3001\u662F\u4E0D\u662F\u201D\uFF0C\u522B\u4EBA\u7ECF\u5E38\u542C\u4E0D\u6E05\uFF0C\u4F46\u662F\u4ED6\u672C\u4EBA\u4E0D\u4EE5\u4E3A\u7136\u3002\u9886\u5BFC\u8BA9\u4ED6\u505A\u4E86\u51E0\u6B21\u6280\u672F\u5206\u4EAB\uFF0C\u542C\u4F17\u7684\u53CD\u5E94\u53EF\u60F3\u800C\u77E5\uFF0C\u4ED6\u624D\u5F7B\u5E95\u8BA4\u6E05\u7F3A\u70B9\u3002</p><p>\u575A\u6301\u5199\u6280\u672F\u535A\u5BA2\uFF0C\u522B\u5728\u610F\u4F60\u5199\u7684\u4E1C\u897F\u5728\u7F51\u4E0A\u5DF2\u7ECF\u91CD\u590D\u5343\u767E\u904D\u3002\u5F53\u81EA\u5DF1\u52A8\u624B\u7684\u65F6\u5019\uFF0C\u624D\u4F1A\u610F\u8BC6\u5230\u773C\u9AD8\u624B\u4F4E\u3002\u8BA9\u6587\u7AE0\u8BFB\u8D77\u6765\u6D41\u7545\u6E05\u6670\uFF0C\u9700\u8981\u5455\u5FC3\u6CA5\u8840\u7684\u5220\u6539\u3002\u5199\u4F5C\u662F\u5BF9\u5927\u8111\u7684\u957F\u671F\u8003\u9A8C\uFF0C\u60F3\u4E0D\u5230\u80AF\u5B9A\u5199\u4E0D\u51FA\uFF0C\u60F3\u4E0D\u6E05\u695A\u80AF\u5B9A\u5199\u4E0D\u6E05\u695A\u3002</p><h3 id="\u9020\u4E2A\u8F6E\u5B50" tabindex="-1"><a class="header-anchor" href="#\u9020\u4E2A\u8F6E\u5B50" aria-hidden="true">#</a> \u9020\u4E2A\u8F6E\u5B50</h3><p>\u6211\u4EEC\u7ECF\u5E38\u8BF4\u4E0D\u8981\u91CD\u590D\u9020\u8F6E\u5B50\u3002\u4E3A\u4E86\u5F00\u53D1\u6548\u7387\uFF0C\u53EF\u4EE5\u4E0D\u9020\u8F6E\u5B50\uFF0C\u4F46\u662F\u5FC5\u987B\u5177\u5907\u9020\u8F6E\u5B50\u7684\u80FD\u529B\u3002\u5EFA\u8BAE\u9020\u4E00\u4E2A\u7B80\u5355\u7684MQ\uFF0C\u4F60\u80FD\u7528\u5230\u901A\u4FE1\u534F\u8BAE\u3001\u8BBE\u8BA1\u6A21\u5F0F\u3001\u961F\u5217\u7B49\u8BB8\u591A\u77E5\u8BC6\u3002\u5728\u9020\u8F6E\u5B50\u7684\u8FC7\u7A0B\u4E2D\uFF0C\u4F60\u4F1A\u9891\u7E41\u7684\u7FFB\u9605\u5404\u79CD\u624B\u518C\u6216\u8005\u535A\u5BA2\uFF0C\u8FD9\u5C31\u662F<strong>\u7528\u8F93\u51FA\u5012\u903C\u8F93\u5165</strong>\u3002</p>',25);function x(_,g){const i=h("ExternalLinkIcon");return d(),l("div",null,[s,e("p",null,[p,e("a",c,[u,o(i)]),b]),f])}var k=r(n,[["render",x],["__file","bokeyuan-ruhegaoxiaodixuexijishu.html.vue"]]);export{k as default};
diff --git a/dist/assets/box.html.9c8b69db.js b/dist/assets/box.html.03f96a13.js
similarity index 99%
rename from dist/assets/box.html.9c8b69db.js
rename to dist/assets/box.html.03f96a13.js
index 143f4196..920cceb5 100644
--- a/dist/assets/box.html.9c8b69db.js
+++ b/dist/assets/box.html.03f96a13.js
@@ -1,4 +1,4 @@
-import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e as p}from"./app.a0271b9c.js";const e={},t=p(`<h1 id="\u6DF1\u5165\u5256\u6790java\u4E2D\u7684\u62C6\u7BB1\u548C\u88C5\u7BB1" tabindex="-1"><a class="header-anchor" href="#\u6DF1\u5165\u5256\u6790java\u4E2D\u7684\u62C6\u7BB1\u548C\u88C5\u7BB1" aria-hidden="true">#</a> \u6DF1\u5165\u5256\u6790Java\u4E2D\u7684\u62C6\u7BB1\u548C\u88C5\u7BB1</h1><p>\u201C\u54E5\uFF0C\u542C\u8BF4 Java \u7684\u6BCF\u4E2A\u57FA\u672C\u7C7B\u578B\u90FD\u5BF9\u5E94\u4E86\u4E00\u4E2A\u5305\u88C5\u7C7B\u578B\uFF0C\u6BD4\u5982\u8BF4 int \u7684\u5305\u88C5\u7C7B\u578B\u4E3A Integer\uFF0Cdouble \u7684\u5305\u88C5\u7C7B\u578B\u4E3A Double\uFF0C\u662F\u8FD9\u6837\u5417\uFF1F\u201D\u4ECE\u4E09\u59B9\u8FD9\u53E5\u8BDD\u5F53\u4E2D\uFF0C\u80FD\u542C\u5F97\u51FA\u6765\uFF0C\u5979\u5DF2\u7ECF\u63D0\u524D\u9884\u4E60\u8FD9\u5757\u5185\u5BB9\u4E86\u3002</p><p>\u201C\u662F\u7684\uFF0C\u4E09\u59B9\u3002\u57FA\u672C\u7C7B\u578B\u548C\u5305\u88C5\u7C7B\u578B\u7684\u533A\u522B\u4E3B\u8981\u6709\u4EE5\u4E0B 4 \u70B9\uFF0C\u6211\u6765\u5E26\u4F60\u5B66\u4E60\u4E00\u4E0B\u3002\u201D\u6211\u56DE\u7B54\u8BF4\u3002\u6211\u4EEC\u5BB6\u7684\u659C\u5BF9\u9762\u521A\u597D\u662F\u4E00\u6240\u5C0F\u5B66\uFF0C\u6240\u4EE5\u65F6\u4E0D\u65F6\u8FD8\u80FD\u542C\u5230\u6717\u6717\u7684\u8BFB\u4E66\u58F0\uFF0C\u8BA9\u4EBA\u5FC3\u60C5\u975E\u5E38\u6109\u5FEB\u3002</p><p>\u201C\u4E09\u59B9\uFF0C\u4F60\u51C6\u5907\u597D\u4E86\u5417\uFF1F\u6211\u4EEC\u5F00\u59CB\u5427\u3002\u201D</p><p>\u201C\u7B2C\u4E00\uFF0C<strong>\u5305\u88C5\u7C7B\u578B\u53EF\u4EE5\u4E3A null\uFF0C\u800C\u57FA\u672C\u7C7B\u578B\u4E0D\u53EF\u4EE5</strong>\u3002\u522B\u5C0F\u770B\u8FD9\u4E00\u70B9\u533A\u522B\uFF0C\u5B83\u4F7F\u5F97\u5305\u88C5\u7C7B\u578B\u53EF\u4EE5\u5E94\u7528\u4E8E POJO \u4E2D\uFF0C\u800C\u57FA\u672C\u7C7B\u578B\u5219\u4E0D\u884C\u3002\u201D</p><p>\u201CPOJO \u662F\u4EC0\u4E48\u5462\uFF1F\u201D\u9047\u5230\u4E0D\u4F1A\u7684\u5C31\u95EE\uFF0C\u4E09\u59B9\u5728\u8FD9\u4E00\u70B9\u4E0A\u8FD8\u662F\u975E\u5E38\u5162\u5162\u4E1A\u4E1A\u7684\u3002</p><p>\u201CPOJO \u7684\u82F1\u6587\u5168\u79F0\u662F Plain Ordinary Java Object\uFF0C\u7FFB\u8BD1\u4E00\u4E0B\u5C31\u662F\uFF0C\u7B80\u5355\u65E0\u89C4\u5219\u7684 Java \u5BF9\u8C61\uFF0C\u53EA\u6709\u5B57\u6BB5\u4EE5\u53CA\u5BF9\u5E94\u7684 setter \u548C getter \u65B9\u6CD5\u3002\u201D</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">class</span> <span class="token class-name">Writer</span> <span class="token punctuation">{</span>
+import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e as p}from"./app.615e41d8.js";const e={},t=p(`<h1 id="\u6DF1\u5165\u5256\u6790java\u4E2D\u7684\u62C6\u7BB1\u548C\u88C5\u7BB1" tabindex="-1"><a class="header-anchor" href="#\u6DF1\u5165\u5256\u6790java\u4E2D\u7684\u62C6\u7BB1\u548C\u88C5\u7BB1" aria-hidden="true">#</a> \u6DF1\u5165\u5256\u6790Java\u4E2D\u7684\u62C6\u7BB1\u548C\u88C5\u7BB1</h1><p>\u201C\u54E5\uFF0C\u542C\u8BF4 Java \u7684\u6BCF\u4E2A\u57FA\u672C\u7C7B\u578B\u90FD\u5BF9\u5E94\u4E86\u4E00\u4E2A\u5305\u88C5\u7C7B\u578B\uFF0C\u6BD4\u5982\u8BF4 int \u7684\u5305\u88C5\u7C7B\u578B\u4E3A Integer\uFF0Cdouble \u7684\u5305\u88C5\u7C7B\u578B\u4E3A Double\uFF0C\u662F\u8FD9\u6837\u5417\uFF1F\u201D\u4ECE\u4E09\u59B9\u8FD9\u53E5\u8BDD\u5F53\u4E2D\uFF0C\u80FD\u542C\u5F97\u51FA\u6765\uFF0C\u5979\u5DF2\u7ECF\u63D0\u524D\u9884\u4E60\u8FD9\u5757\u5185\u5BB9\u4E86\u3002</p><p>\u201C\u662F\u7684\uFF0C\u4E09\u59B9\u3002\u57FA\u672C\u7C7B\u578B\u548C\u5305\u88C5\u7C7B\u578B\u7684\u533A\u522B\u4E3B\u8981\u6709\u4EE5\u4E0B 4 \u70B9\uFF0C\u6211\u6765\u5E26\u4F60\u5B66\u4E60\u4E00\u4E0B\u3002\u201D\u6211\u56DE\u7B54\u8BF4\u3002\u6211\u4EEC\u5BB6\u7684\u659C\u5BF9\u9762\u521A\u597D\u662F\u4E00\u6240\u5C0F\u5B66\uFF0C\u6240\u4EE5\u65F6\u4E0D\u65F6\u8FD8\u80FD\u542C\u5230\u6717\u6717\u7684\u8BFB\u4E66\u58F0\uFF0C\u8BA9\u4EBA\u5FC3\u60C5\u975E\u5E38\u6109\u5FEB\u3002</p><p>\u201C\u4E09\u59B9\uFF0C\u4F60\u51C6\u5907\u597D\u4E86\u5417\uFF1F\u6211\u4EEC\u5F00\u59CB\u5427\u3002\u201D</p><p>\u201C\u7B2C\u4E00\uFF0C<strong>\u5305\u88C5\u7C7B\u578B\u53EF\u4EE5\u4E3A null\uFF0C\u800C\u57FA\u672C\u7C7B\u578B\u4E0D\u53EF\u4EE5</strong>\u3002\u522B\u5C0F\u770B\u8FD9\u4E00\u70B9\u533A\u522B\uFF0C\u5B83\u4F7F\u5F97\u5305\u88C5\u7C7B\u578B\u53EF\u4EE5\u5E94\u7528\u4E8E POJO \u4E2D\uFF0C\u800C\u57FA\u672C\u7C7B\u578B\u5219\u4E0D\u884C\u3002\u201D</p><p>\u201CPOJO \u662F\u4EC0\u4E48\u5462\uFF1F\u201D\u9047\u5230\u4E0D\u4F1A\u7684\u5C31\u95EE\uFF0C\u4E09\u59B9\u5728\u8FD9\u4E00\u70B9\u4E0A\u8FD8\u662F\u975E\u5E38\u5162\u5162\u4E1A\u4E1A\u7684\u3002</p><p>\u201CPOJO \u7684\u82F1\u6587\u5168\u79F0\u662F Plain Ordinary Java Object\uFF0C\u7FFB\u8BD1\u4E00\u4E0B\u5C31\u662F\uFF0C\u7B80\u5355\u65E0\u89C4\u5219\u7684 Java \u5BF9\u8C61\uFF0C\u53EA\u6709\u5B57\u6BB5\u4EE5\u53CA\u5BF9\u5E94\u7684 setter \u548C getter \u65B9\u6CD5\u3002\u201D</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">class</span> <span class="token class-name">Writer</span> <span class="token punctuation">{</span>
 	<span class="token keyword">private</span> <span class="token class-name">Integer</span> age<span class="token punctuation">;</span>
 	<span class="token keyword">private</span> <span class="token class-name">String</span> name<span class="token punctuation">;</span>
 
diff --git a/dist/assets/buy-cloud-server.html.d200b8bc.js b/dist/assets/buy-cloud-server.html.5057ae50.js
similarity index 96%
rename from dist/assets/buy-cloud-server.html.d200b8bc.js
rename to dist/assets/buy-cloud-server.html.5057ae50.js
index ad58b599..80b29156 100644
--- a/dist/assets/buy-cloud-server.html.d200b8bc.js
+++ b/dist/assets/buy-cloud-server.html.5057ae50.js
@@ -1 +1 @@
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diff --git a/dist/assets/buy-domain.html.4406ff12.js b/dist/assets/buy-domain.html.e087e5aa.js
similarity index 98%
rename from dist/assets/buy-domain.html.4406ff12.js
rename to dist/assets/buy-domain.html.e087e5aa.js
index 512e63a6..aa3c9d45 100644
--- a/dist/assets/buy-domain.html.4406ff12.js
+++ b/dist/assets/buy-domain.html.e087e5aa.js
@@ -1 +1 @@
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diff --git a/dist/assets/bytecode.html.09a0585c.js b/dist/assets/bytecode.html.568c5a04.js
similarity index 99%
rename from dist/assets/bytecode.html.09a0585c.js
rename to dist/assets/bytecode.html.568c5a04.js
index cb48660e..8d75c50c 100644
--- a/dist/assets/bytecode.html.09a0585c.js
+++ b/dist/assets/bytecode.html.568c5a04.js
@@ -1,4 +1,4 @@
-import{_ as s}from"./plugin-vue_export-helper.21dcd24c.js";import{r as l,o as d,c as t,a,b as c,e as i,d as e}from"./app.a0271b9c.js";const r={},v=i(`<h1 id="\u4ECEjavap\u7684\u89D2\u5EA6\u8F7B\u677E\u770B\u61C2\u5B57\u8282\u7801" tabindex="-1"><a class="header-anchor" href="#\u4ECEjavap\u7684\u89D2\u5EA6\u8F7B\u677E\u770B\u61C2\u5B57\u8282\u7801" aria-hidden="true">#</a> \u4ECEjavap\u7684\u89D2\u5EA6\u8F7B\u677E\u770B\u61C2\u5B57\u8282\u7801</h1><h3 id="_01\u3001\u5B57\u8282\u7801" tabindex="-1"><a class="header-anchor" href="#_01\u3001\u5B57\u8282\u7801" aria-hidden="true">#</a> 01\u3001\u5B57\u8282\u7801</h3><p>\u8BA1\u7B97\u673A\u6BD4\u8F83\u201C\u50BB\u201D\uFF0C\u53EA\u8BA4 0 \u548C 1\uFF0C\u8FD9\u610F\u5473\u7740\u6211\u4EEC\u7F16\u5199\u7684\u4EE3\u7801\u6700\u7EC8\u90FD\u8981\u7F16\u8BD1\u6210\u673A\u5668\u7801\u624D\u80FD\u88AB\u8BA1\u7B97\u673A\u6267\u884C\u3002Java \u5728\u8BDE\u751F\u4E4B\u521D\u5C31\u63D0\u51FA\u4E86\u4E00\u4E2A\u975E\u5E38\u8457\u540D\u7684\u5BA3\u4F20\u53E3\u53F7: &quot;<strong>\u4E00\u6B21\u7F16\u5199\uFF0C\u5904\u5904\u8FD0\u884C</strong>&quot;\u3002</p><blockquote><p><strong>Write Once, Run Anywhere.</strong></p></blockquote><p>\u4E3A\u4E86\u8FD9\u4E2A\u53E3\u53F7\uFF0CJava \u7684\u4EB2\u5988 Sun \u516C\u53F8\u4EE5\u53CA\u5176\u4ED6\u865A\u62DF\u673A\u63D0\u4F9B\u5546\u53D1\u5E03\u4E86\u8BB8\u591A\u53EF\u4EE5\u5728\u4E0D\u540C\u5E73\u53F0\u4E0A\u8FD0\u884C\u7684 Java \u865A\u62DF\u673A\uFF0C\u800C\u8FD9\u4E9B\u865A\u62DF\u673A\u90FD\u62E5\u6709\u4E00\u4E2A\u5171\u540C\u7684\u529F\u80FD\uFF0C\u90A3\u5C31\u662F\u53EF\u4EE5\u8F7D\u5165\u548C\u6267\u884C\u540C\u4E00\u79CD\u4E0E\u5E73\u53F0\u65E0\u5173\u7684\u5B57\u8282\u7801\uFF08Byte Code\uFF09\u3002</p><p>\u6709\u4E86 Java \u865A\u62DF\u673A\u7684\u5E2E\u52A9\uFF0C\u6211\u4EEC\u7F16\u5199\u7684 Java \u6E90\u4EE3\u7801\u4E0D\u5FC5\u518D\u6839\u636E\u4E0D\u540C\u5E73\u53F0\u7F16\u8BD1\u6210\u5BF9\u5E94\u7684\u673A\u5668\u7801\u4E86\uFF0C\u53EA\u9700\u8981\u751F\u6210\u4E00\u4EFD\u5B57\u8282\u7801\uFF0C\u7136\u540E\u518D\u5C06\u5B57\u8282\u7801\u6587\u4EF6\u4EA4\u7531\u8FD0\u884C\u5728\u4E0D\u540C\u5E73\u53F0\u4E0A\u7684 Java \u865A\u62DF\u673A\u8BFB\u53D6\u540E\u6267\u884C\u5C31\u53EF\u4EE5\u4E86\u3002</p><p>\u5982\u4ECA\u7684 Java \u865A\u62DF\u673A\u975E\u5E38\u5F3A\u5927\uFF0C\u4E0D\u4EC5\u652F\u6301 Java \u8BED\u8A00\uFF0C\u8FD8\u652F\u6301\u5F88\u591A\u5176\u4ED6\u7684\u7F16\u7A0B\u8BED\u8A00\uFF0C\u6BD4\u5982\u8BF4 Groovy\u3001Scala\u3001Koltin \u7B49\u7B49\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/bytecode-dd31bbd6-c75c-4426-9437-c0f57ea3b86f.png" alt=""></p><p>\u6765\u770B\u4E00\u6BB5\u4EE3\u7801\u5427\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">Main</span> <span class="token punctuation">{</span>
+import{_ as s}from"./plugin-vue_export-helper.21dcd24c.js";import{r as l,o as d,c as t,a,b as c,e as i,d as e}from"./app.615e41d8.js";const r={},v=i(`<h1 id="\u4ECEjavap\u7684\u89D2\u5EA6\u8F7B\u677E\u770B\u61C2\u5B57\u8282\u7801" tabindex="-1"><a class="header-anchor" href="#\u4ECEjavap\u7684\u89D2\u5EA6\u8F7B\u677E\u770B\u61C2\u5B57\u8282\u7801" aria-hidden="true">#</a> \u4ECEjavap\u7684\u89D2\u5EA6\u8F7B\u677E\u770B\u61C2\u5B57\u8282\u7801</h1><h3 id="_01\u3001\u5B57\u8282\u7801" tabindex="-1"><a class="header-anchor" href="#_01\u3001\u5B57\u8282\u7801" aria-hidden="true">#</a> 01\u3001\u5B57\u8282\u7801</h3><p>\u8BA1\u7B97\u673A\u6BD4\u8F83\u201C\u50BB\u201D\uFF0C\u53EA\u8BA4 0 \u548C 1\uFF0C\u8FD9\u610F\u5473\u7740\u6211\u4EEC\u7F16\u5199\u7684\u4EE3\u7801\u6700\u7EC8\u90FD\u8981\u7F16\u8BD1\u6210\u673A\u5668\u7801\u624D\u80FD\u88AB\u8BA1\u7B97\u673A\u6267\u884C\u3002Java \u5728\u8BDE\u751F\u4E4B\u521D\u5C31\u63D0\u51FA\u4E86\u4E00\u4E2A\u975E\u5E38\u8457\u540D\u7684\u5BA3\u4F20\u53E3\u53F7: &quot;<strong>\u4E00\u6B21\u7F16\u5199\uFF0C\u5904\u5904\u8FD0\u884C</strong>&quot;\u3002</p><blockquote><p><strong>Write Once, Run Anywhere.</strong></p></blockquote><p>\u4E3A\u4E86\u8FD9\u4E2A\u53E3\u53F7\uFF0CJava \u7684\u4EB2\u5988 Sun \u516C\u53F8\u4EE5\u53CA\u5176\u4ED6\u865A\u62DF\u673A\u63D0\u4F9B\u5546\u53D1\u5E03\u4E86\u8BB8\u591A\u53EF\u4EE5\u5728\u4E0D\u540C\u5E73\u53F0\u4E0A\u8FD0\u884C\u7684 Java \u865A\u62DF\u673A\uFF0C\u800C\u8FD9\u4E9B\u865A\u62DF\u673A\u90FD\u62E5\u6709\u4E00\u4E2A\u5171\u540C\u7684\u529F\u80FD\uFF0C\u90A3\u5C31\u662F\u53EF\u4EE5\u8F7D\u5165\u548C\u6267\u884C\u540C\u4E00\u79CD\u4E0E\u5E73\u53F0\u65E0\u5173\u7684\u5B57\u8282\u7801\uFF08Byte Code\uFF09\u3002</p><p>\u6709\u4E86 Java \u865A\u62DF\u673A\u7684\u5E2E\u52A9\uFF0C\u6211\u4EEC\u7F16\u5199\u7684 Java \u6E90\u4EE3\u7801\u4E0D\u5FC5\u518D\u6839\u636E\u4E0D\u540C\u5E73\u53F0\u7F16\u8BD1\u6210\u5BF9\u5E94\u7684\u673A\u5668\u7801\u4E86\uFF0C\u53EA\u9700\u8981\u751F\u6210\u4E00\u4EFD\u5B57\u8282\u7801\uFF0C\u7136\u540E\u518D\u5C06\u5B57\u8282\u7801\u6587\u4EF6\u4EA4\u7531\u8FD0\u884C\u5728\u4E0D\u540C\u5E73\u53F0\u4E0A\u7684 Java \u865A\u62DF\u673A\u8BFB\u53D6\u540E\u6267\u884C\u5C31\u53EF\u4EE5\u4E86\u3002</p><p>\u5982\u4ECA\u7684 Java \u865A\u62DF\u673A\u975E\u5E38\u5F3A\u5927\uFF0C\u4E0D\u4EC5\u652F\u6301 Java \u8BED\u8A00\uFF0C\u8FD8\u652F\u6301\u5F88\u591A\u5176\u4ED6\u7684\u7F16\u7A0B\u8BED\u8A00\uFF0C\u6BD4\u5982\u8BF4 Groovy\u3001Scala\u3001Koltin \u7B49\u7B49\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/bytecode-dd31bbd6-c75c-4426-9437-c0f57ea3b86f.png" alt=""></p><p>\u6765\u770B\u4E00\u6BB5\u4EE3\u7801\u5427\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">Main</span> <span class="token punctuation">{</span>
     <span class="token keyword">private</span> <span class="token keyword">int</span> age <span class="token operator">=</span> <span class="token number">18</span><span class="token punctuation">;</span>
     <span class="token keyword">public</span> <span class="token keyword">int</span> <span class="token function">getAge</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
         <span class="token keyword">return</span> age<span class="token punctuation">;</span>
diff --git a/dist/assets/bzhan-10wan.html.b3906807.js b/dist/assets/bzhan-10wan.html.e0ad4af0.js
similarity index 99%
rename from dist/assets/bzhan-10wan.html.b3906807.js
rename to dist/assets/bzhan-10wan.html.e0ad4af0.js
index 04e6b03b..8e6c51a3 100644
--- a/dist/assets/bzhan-10wan.html.b3906807.js
+++ b/dist/assets/bzhan-10wan.html.e0ad4af0.js
@@ -1,4 +1,4 @@
-import{_ as p}from"./plugin-vue_export-helper.21dcd24c.js";import{r as t,o as s,c as o,a,b as c,e,d as r}from"./app.a0271b9c.js";const i={},b=e('<h1 id="\u6211\u7684\u7B2C\u4E00\u4E2A-10-\u4E07-b\u7AD9\u89C6\u9891\u64AD\u653E" tabindex="-1"><a class="header-anchor" href="#\u6211\u7684\u7B2C\u4E00\u4E2A-10-\u4E07-b\u7AD9\u89C6\u9891\u64AD\u653E" aria-hidden="true">#</a> \u6211\u7684\u7B2C\u4E00\u4E2A\uFF0C10 \u4E07(B\u7AD9\u89C6\u9891\u64AD\u653E)</h1><p>\u606D\u559C\u8FD9\u4E2A B\u3002\u3002\u3002\u3002\u3002\u3002\u7AD9\u4E0A\u7684 UP\uFF0C\u4E0A\u4E00\u671F\u89C6\u9891\u64AD\u653E\u91CF\u7A81\u7834\u4E86 10 \u4E07\uFF01\u8FD9\u4E5F\u662F\u4E8C\u54E5\u4EBA\u751F\u5F53\u4E2D\u7684\u7B2C\u4E00\u6B21\uFF0C\u51ED\u501F\u5355\u6761\u89C6\u9891\u7A81\u7834 10 \u4E07\u64AD\u653E\uFF0C\u5FC5\u987B\u5F97\u7EAA\u5FF5\u4E0B\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/bzhan-10wan-4f27a848-7dba-4cd3-a705-a6ef02162338.png" alt=""></p><p>\u4ECE\u4F17\u591A\u7684\u5BAB\u6597\u5267\u4E2D\u6211\u5F97\u51FA\u4E86\u4E00\u6761\u5B9D\u8D35\u7684\u4EBA\u751F\u7ECF\u9A8C\uFF1A\u201C\u6BCD\u51ED\u5B50\u8D35\u201D\u3002\u8FD9\u6761\u7ECF\u9A8C\u540C\u6837\u9002\u7528\u4E8E\u4E8C\u54E5\u672C\u4EBA\uFF0C\u53EF\u80FD\u4F1A\u56E0\u4E3A\u8FD9\u4E00\u671F\u89C6\u9891\uFF0C\u5439\u8FD9\u8F88\u5B50\u6700\u591A\u7684\u725B\u903C\uFF1A\u8FD9\u4E0D\uFF0C\u8363\u83B7\u54D4\u54E9\u54D4\u54E9\u7B2C 3 \u5468\u3010\u6821\u56ED\u4F18\u79C0\u5956&amp;\u6821\u56ED\u65B0\u661F\u5956\u3011\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/bzhan-10wan-340f1fe4-49f1-48c6-a972-c5da7de8ddd0.png" alt=""></p><p>\u6211\u5DF2\u7ECF\u6309\u637A\u4E0D\u4F4F\u6FC0\u52A8\u7684\u5FC3\u60C5\uFF0C\u5728\u4E24\u4E07\u4EBA\u7684\u670B\u53CB\u5708\u5927\u8086\u70AB\u8000\u4E86\u3002\u5341\u4E07\u64AD\u653E\uFF0C\u5BF9\u4E8E\u767E\u5927 UP \u6765\u8BF4\uFF0C\u53EF\u80FD\u5C31\u662F\u5206\u5206\u949F\u7684\u4E8B\uFF0C\u53EF\u5BF9\u4E8E\u6211\u8FD9\u4E2A\uFF08\u672A\u6765\u7684\uFF09 B\u7AD9\u767E\u5927\u6765\u8BF4\uFF0C\u82E6\u82E6\u7B49\u4E86 149 \u5929\uFF01\uFF01\uFF01\uFF01\uFF01\uFF01\uFF01</p><p>\u8FD9\u771F\u662F\u4E00\u4E2A\u6F2B\u957F\u7684\u65E5\u5B50\uFF0C\u9B3C\u77E5\u9053\u8FD9\u4E9B\u5929\u6211\u7ECF\u5386\u4E86\u4EC0\u4E48\u3002</p><p>\u6211\u4E00\u5EA6\u6000\u7591\u81EA\u5DF1\u5230\u5E95\u9002\u4E0D\u9002\u5408\u62CD\u89C6\u9891\uFF0C\u8868\u60C5\u7684\u50F5\u786C\uFF0C\u666E\u901A\u8BDD\u7684\u5851\u6599\uFF0C\u751A\u81F3\u8FDE\u81EA\u5DF1\u4E00\u9879\u5F15\u4EE5\u4E3A\u8363\u7684\u53F0\u672C\uFF0C\u90FD\u89C9\u5F97\u62C9\u80EF\u3002</p><p>\u53EF\u5C31\u56E0\u4E3A\u8FD9\u4E2A\u89C6\u9891\uFF0C\u8BA9\u6211\u91CD\u83B7\u65B0\u751F\uFF0C\u4EA2\u594B\u7684\u5FC3\u60C5\u4E00\u76F4\u5728\u6301\u7EED\u3002\u6211\u77E5\u9053\uFF0C\u4E00\u6761\u89C6\u9891\u7684\u64AD\u653E\u7A81\u7834 10 \u4E07\uFF0C\u5E76\u4E0D\u610F\u5473\u7740\u4E0B\u4E00\u4E2A\u89C6\u9891\u4E5F\u4F1A\u6709 10 \u4E07\u7684\u64AD\u653E\uFF0C\u4F46\u597D\u6B79\u80FD\u8BA9\u6211\u611F\u5230\u5E78\u798F\u4F1A\uFF0C\u81F3\u5C11\u53EF\u4EE5\u201C\u539A\u989C\u65E0\u803B\u201D\u5730\u518D\u5439\u4E00\u6B21\u725B\u76AE\u5427\uFF01</p><p>\u6628\u5929\u7684\u6587\u7AE0\u91CC\uFF0C\u627F\u8BFA\u65B0\u7684\u4E00\u5E74 2022 \u5E74\u628A\u809D\u91CD\u65B0\u4EA4\u7ED9\u5927\u5BB6\uFF0C\u6211\u5C31\u4F1A\u8BF4\u5230\u505A\u5230\uFF1A\u8FD9\u5E74\u5934\uFF0C\u804C\u573A\u5C31\u6D41\u884C\u8FD9\u4E2A\u201C\u6C99\u96D5\u201D\u6587\u5316\uFF0C<strong>\u4F60\u6709\u6CA1\u6709\u80FD\u529B\u4E0D\u91CD\u8981\uFF0C\u91CD\u8981\u7684\u662F\u9886\u5BFC\u4EA4\u4EE3\u4F60\u7684\u6709\u6CA1\u6709\u53BB\u6267\u884C</strong>\u3002</p><p>\u4E8C\u54E5\u6253\u7B97\u8C41\u51FA\u53BB\u4E86\uFF01</p><p>\u65B0\u4E00\u671F\u89C6\u9891\u4E5F\u4E0A\u4F20\u5230 B 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alt=""></p><p>\u554A\uFF0C\u4E0D\uFF0C\u8FD8\u662F\u8981\u7A0D\u5FAE\u5377\u4E00\u5377\u5427\uFF0C\u514D\u5F97\u88AB\u90A3\u7FA4\u8FD8\u6709\u534A\u5E74\u5C31\u6BD5\u4E1A\u7684\u5BB6\u4F19\u4EEC\u62CD\u6B7B\u5728\u6C99\u6EE9\u4E0A\u3002\u3002\u3002\u3002</p><hr><p>\u4E8C\u54E5\u7684\u8BFB\u8005\u5F53\u4E2D\u6709\u4E0D\u5C11\u5927\u5B66\u751F\uFF0C\u6240\u4EE5\u5F53\u77E5\u4E4E\u4E0A\u5237\u5230\u8FD9\u4E2A\u9898\u76EE\u65F6\uFF1A</p><blockquote><p>\u201C\u5B66\u6821\u8BFE\u7A0B\u89C4\u5212\u7684\u6BD4\u8F83\u5947\u602A\uFF0C\u5927\u4E00\u4E0A\u5B66\u671F\u5B66c++\uFF0C\u4E0B\u5B66\u671F\u5B66python\uFF0C\u5728\u5BD2\u5047\u6211\u662F\u5E94\u8BE5\u590D\u4E60\u6216\u9884\u4E60\u8BFE\u5185\u5185\u5BB9\uFF08python\uFF0Cc++\uFF09\uFF0C\u8FD8\u662F\u81EA\u5DF1\u5BF9\u5916\u62D3\u5C55\u5462\uFF08c\uFF0C\u6570\u636E\u7ED3\u6784\uFF09\uFF1F\u201D</p></blockquote><p>\u7ACB\u9A6C\u5C31\u51B2\u4E0A\u53BB\u7B54\u4E86\u4E00\u6CE2\u3002</p><p><strong>\u5C31\u51B2\u8FD9\u4EFD\u7231\u5B66\u4E60\u7684\u51B3\u5FC3\uFF0C\u4E09\u5E74\u540E\u7EDD\u5BF9\u4E92\u8054\u7F51\u516C\u53F8\u7684 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Chicken\uFF09\uFF0C\u53C8\u79F0\u5BAB\u7206\u9E21\u4E01\uFF0C\u5448\u7CCA\u8FA3\u8354\u679D\u5473\uFF0C\u6E90\u4E8E\u9ED4\u83DC\u3001\u6D41\u4F20\u81F3\u9C81\u800C\u540E\u6210\u4E8E\u5DDD\u83DC\u7684\u4E00\u9053\u5DDD\u5473\u540D\u83DC\u3002\u8D35\u5DDE\u3001\u5C71\u4E1C\u548C\u56DB\u5DDD\u4E09\u5730\u5BF9\u8FD9\u9053\u83DC\u7684\u505A\u6CD5\u4E0D\u5B8C\u5168\u4E00\u6837\uFF0C\u79F0\u547C\u4E5F\u6709\u5DEE\u5F02\u3002\u8D35\u5DDE\u79F0\u4E3A\u7CCA\u8FA3\u5B50\u9E21\u4E01\uFF0C\u5C71\u4E1C\u5219\u540D\u4E3A\u9171\u7206\u9E21\u4E01\uFF0C\u800C\u56DB\u5DDD\u662F\u4EE5\u5BAB\u4FDD\u9E21\u4E01\u4E3A\u540D\u7684\u3002</p></blockquote><p>\u6765\uFF0C\u62BD\u8C61\u4E0B\u5BAB\u4FDD\u9E21\u4E01\u3002</p><div class="language-c ext-c line-numbers-mode"><pre class="language-c"><code><span class="token keyword">struct</span> <span class="token class-name">KungPaoChicken</span> <span class="token punctuation">{</span>
+import{_ as p}from"./plugin-vue_export-helper.21dcd24c.js";import{r as t,o as s,c as o,a,b as c,e,d as r}from"./app.615e41d8.js";const i={},b=e('<h1 id="\u6211\u7684\u7B2C\u4E00\u4E2A-10-\u4E07-b\u7AD9\u89C6\u9891\u64AD\u653E" tabindex="-1"><a class="header-anchor" href="#\u6211\u7684\u7B2C\u4E00\u4E2A-10-\u4E07-b\u7AD9\u89C6\u9891\u64AD\u653E" aria-hidden="true">#</a> \u6211\u7684\u7B2C\u4E00\u4E2A\uFF0C10 \u4E07(B\u7AD9\u89C6\u9891\u64AD\u653E)</h1><p>\u606D\u559C\u8FD9\u4E2A B\u3002\u3002\u3002\u3002\u3002\u3002\u7AD9\u4E0A\u7684 UP\uFF0C\u4E0A\u4E00\u671F\u89C6\u9891\u64AD\u653E\u91CF\u7A81\u7834\u4E86 10 \u4E07\uFF01\u8FD9\u4E5F\u662F\u4E8C\u54E5\u4EBA\u751F\u5F53\u4E2D\u7684\u7B2C\u4E00\u6B21\uFF0C\u51ED\u501F\u5355\u6761\u89C6\u9891\u7A81\u7834 10 \u4E07\u64AD\u653E\uFF0C\u5FC5\u987B\u5F97\u7EAA\u5FF5\u4E0B\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/bzhan-10wan-4f27a848-7dba-4cd3-a705-a6ef02162338.png" alt=""></p><p>\u4ECE\u4F17\u591A\u7684\u5BAB\u6597\u5267\u4E2D\u6211\u5F97\u51FA\u4E86\u4E00\u6761\u5B9D\u8D35\u7684\u4EBA\u751F\u7ECF\u9A8C\uFF1A\u201C\u6BCD\u51ED\u5B50\u8D35\u201D\u3002\u8FD9\u6761\u7ECF\u9A8C\u540C\u6837\u9002\u7528\u4E8E\u4E8C\u54E5\u672C\u4EBA\uFF0C\u53EF\u80FD\u4F1A\u56E0\u4E3A\u8FD9\u4E00\u671F\u89C6\u9891\uFF0C\u5439\u8FD9\u8F88\u5B50\u6700\u591A\u7684\u725B\u903C\uFF1A\u8FD9\u4E0D\uFF0C\u8363\u83B7\u54D4\u54E9\u54D4\u54E9\u7B2C 3 \u5468\u3010\u6821\u56ED\u4F18\u79C0\u5956&amp;\u6821\u56ED\u65B0\u661F\u5956\u3011\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/bzhan-10wan-340f1fe4-49f1-48c6-a972-c5da7de8ddd0.png" alt=""></p><p>\u6211\u5DF2\u7ECF\u6309\u637A\u4E0D\u4F4F\u6FC0\u52A8\u7684\u5FC3\u60C5\uFF0C\u5728\u4E24\u4E07\u4EBA\u7684\u670B\u53CB\u5708\u5927\u8086\u70AB\u8000\u4E86\u3002\u5341\u4E07\u64AD\u653E\uFF0C\u5BF9\u4E8E\u767E\u5927 UP 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alt=""></p><p>\u554A\uFF0C\u4E0D\uFF0C\u8FD8\u662F\u8981\u7A0D\u5FAE\u5377\u4E00\u5377\u5427\uFF0C\u514D\u5F97\u88AB\u90A3\u7FA4\u8FD8\u6709\u534A\u5E74\u5C31\u6BD5\u4E1A\u7684\u5BB6\u4F19\u4EEC\u62CD\u6B7B\u5728\u6C99\u6EE9\u4E0A\u3002\u3002\u3002\u3002</p><hr><p>\u4E8C\u54E5\u7684\u8BFB\u8005\u5F53\u4E2D\u6709\u4E0D\u5C11\u5927\u5B66\u751F\uFF0C\u6240\u4EE5\u5F53\u77E5\u4E4E\u4E0A\u5237\u5230\u8FD9\u4E2A\u9898\u76EE\u65F6\uFF1A</p><blockquote><p>\u201C\u5B66\u6821\u8BFE\u7A0B\u89C4\u5212\u7684\u6BD4\u8F83\u5947\u602A\uFF0C\u5927\u4E00\u4E0A\u5B66\u671F\u5B66c++\uFF0C\u4E0B\u5B66\u671F\u5B66python\uFF0C\u5728\u5BD2\u5047\u6211\u662F\u5E94\u8BE5\u590D\u4E60\u6216\u9884\u4E60\u8BFE\u5185\u5185\u5BB9\uFF08python\uFF0Cc++\uFF09\uFF0C\u8FD8\u662F\u81EA\u5DF1\u5BF9\u5916\u62D3\u5C55\u5462\uFF08c\uFF0C\u6570\u636E\u7ED3\u6784\uFF09\uFF1F\u201D</p></blockquote><p>\u7ACB\u9A6C\u5C31\u51B2\u4E0A\u53BB\u7B54\u4E86\u4E00\u6CE2\u3002</p><p><strong>\u5C31\u51B2\u8FD9\u4EFD\u7231\u5B66\u4E60\u7684\u51B3\u5FC3\uFF0C\u4E09\u5E74\u540E\u7EDD\u5BF9\u4E92\u8054\u7F51\u516C\u53F8\u7684 offer \u62FF\u5230\u624B\u8F6F</strong>\uFF01</p><p>\u8BB2\u771F\uFF0C\u5C0F\u4F19\u4F34\u5B66\u6821\u5B89\u6392\u7684\u8BFE\u7A0B\u548C\u6211\u5F53\u5E74\u975E\u5E38\u76F8\u4F3C\uFF0C\u4E5F\u662F\u5927\u4E00\u4E0A\u6765\u5C31\u641E Java\uFF0C\u9694\u58C1\u73ED\u4E0A\u6765\u5C31\u641E C++\uFF0C\u5B8C\u5168\u6CA1\u6709\u5B89\u6392 C\u8BED\u8A00\u6765\u8FC7\u6E21\u4E0B\u3002</p><p>\u6240\u4EE5\u6211\u7684\u5EFA\u8BAE\u662F\uFF0C<strong>\u8D81\u5BD2\u5047\u6253\u6253\u738B\u8005\u4E0A\u4E0A\u5206\u5427</strong>\uFF01</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/bzhan-10wan-63412a28-7315-4ac4-a04b-a049b338c0d8.gif" alt=""></p><p>\u554A\uFF0C\u4E0D\uFF01<strong>\u8D81\u5BD2\u5047\u5237\u4E00\u6CE2\u6E05\u534E\u5728 GitHub \u4E0A 20k+ star \u7684\u5F00\u6E90\u8BFE\u7A0B\u5427</strong>\uFF01</p><h2 id="\u4E00\u3001\u6E05\u534E\u5927\u5B66\u5728-github-\u4E0A\u7684\u5F00\u6E90\u8BFE\u7A0B" tabindex="-1"><a class="header-anchor" href="#\u4E00\u3001\u6E05\u534E\u5927\u5B66\u5728-github-\u4E0A\u7684\u5F00\u6E90\u8BFE\u7A0B" aria-hidden="true">#</a> \u4E00\u3001\u6E05\u534E\u5927\u5B66\u5728 GitHub \u4E0A\u7684\u5F00\u6E90\u8BFE\u7A0B</h2><blockquote><p>\u5730\u5740\uFF1Ahttps://github.com/PKUanonym/REKCARC-TSC-UHT</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/bzhan-10wan-c309fdb8-084c-44b1-bd8e-86a4b39cbb7b.png" alt=""></p><p>\u6211\u6765\u5E26\u5C0F\u4F19\u4F34\u4EEC\u8FC7\u4E00\u4E0B\u6E05\u534E\u7684\u8BFE\u7A0B\u5B89\u6392\u54C8\uFF0C\u4E3B\u8981\u662F\u9488\u5BF9\u8BA1\u7B97\u673A\u4E13\u4E1A\u7684\u3002</p><p>\u5927\u4E00\u4E0A\u7684\u8BA1\u7B97\u673A\u57FA\u7840\u8BFE\u7A0B\u6709\uFF1A\u8BA1\u7B97\u673A\u79D1\u5B66\u5BFC\u8BBA\u3001\u7A0B\u5E8F\u8BBE\u8BA1\u57FA\u7840</p><p>\u5927\u4E00\u4E0B\u6709\uFF1A\u9762\u5411\u5BF9\u8C61\u7A0B\u5E8F\u8BBE\u8BA1\u57FA\u7840</p><p>\u5927\u4E8C\u4E0A\u6709\uFF1A\u6570\u636E\u7ED3\u6784</p><p>\u5927\u4E8C\u4E0B\u6709\uFF1A\u4EBA\u5DE5\u667A\u80FD\u5BFC\u8BBA\u3001\u8BA1\u7B97\u673A\u56FE\u5F62\u5B66\u57FA\u7840\u3001\u9AD8\u6027\u80FD\u8BA1\u7B97\u5BFC\u8BBA</p><p>\u5927\u4E09\u4E0A\u6709\uFF1A\u8BA1\u7B97\u673A\u7EC4\u6210\u539F\u7406\u3001\u8BA1\u7B97\u673A\u7F51\u7EDC\u539F\u7406\u3001\u7F16\u8BD1\u539F\u7406\u3001\u8F6F\u4EF6\u5DE5\u7A0B\u3001\u6570\u636E\u5E93\u7CFB\u7EDF\u6982\u8BBA\u3001\u4EBA\u5DE5\u795E\u7ECF\u7F51\u7EDC\u3001\u8BA1\u7B97\u673A\u7F51\u7EDC\u5B89\u5168\u6280\u672F\u3001\u4EBA\u673A\u4EA4\u4E92\u7406\u8BBA\u4E0E\u6280\u672F</p><p>\u5927\u4E09\u4E0B\u6709\uFF1A\u64CD\u4F5C\u7CFB\u7EDF\u3001\u8BA1\u7B97\u673A\u7CFB\u7EDF\u7ED3\u6784\u3001\u673A\u5668\u5B66\u4E60\u6982\u8BBA\u3001\u6570\u636E\u6316\u6398\u3001\u641C\u7D22\u5F15\u64CE\u6280\u672F\u57FA\u7840\u3001\u5B58\u50A8\u6280\u672F\u57FA\u7840\u3001\u6570\u636E\u5E93\u4E13\u9898\u8BAD\u7EC3\u3001\u8BA1\u7B97\u673A\u7F51\u7EDC\u4E13\u9898\u8BAD\u7EC3\u3002</p><p>\u5927\u56DB\u4E3B\u8981\u662F\u5B9E\u8DF5\u3001\u5B9E\u4E60\u3001\u6BD5\u8BBE\u7B49\uFF0C\u5269\u4E0B\u7684\u8BA1\u7B97\u673A\u8BFE\u7A0B\u4E3B\u8981\u6709\u7F51\u7EDC\u5B89\u5168\u5DE5\u7A0B\u4E0E\u5B9E\u8DF5\u3001\u5D4C\u5165\u5F0F\u7CFB\u7EDF\u3002</p><p>\u53EF\u4EE5\u770B\u5F97\u51FA\uFF0C\u5927\u4E00\u5927\u4E8C\u57FA\u672C\u4E0A\u662F\u5728\u6478\u9C7C\u72B6\u6001\uFF0C\u5927\u4E09\u7A81\u7136\u5F00\u59CB\u53D1\u529B\uFF0C\u5404\u79CD\u8BA1\u7B97\u673A\u57FA\u7840\u8BFE\u7A0B\uFF0C\u975E\u5E38\u75AF\u72C2\uFF01</p><p>\u4E0D\u8FC7\uFF1A</p><p>\u6709\u5FD7\u8005\u4E8B\u7ADF\u6210\uFF0C\u7834\u91DC\u6C89\u821F\uFF0C\u767E\u4E8C\u79E6\u5173\u7EC8\u5C5E\u695A\uFF1B<br> 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\u4E09\u3001\u5B66\u4E60\u6570\u636E\u7ED3\u6784</h2><p>\u4EC0\u4E48\u662F\u6570\u636E\u7ED3\u6784\uFF1F</p><blockquote><p>\u6570\u636E\u7ED3\u6784\u662F\u4E00\u79CD\u5177\u6709\u4E00\u5B9A\u903B\u8F91\u5173\u7CFB\uFF0C\u5728\u8BA1\u7B97\u673A\u4E2D\u5E94\u7528\u67D0\u79CD\u5B58\u50A8\u7ED3\u6784\uFF0C\u5E76\u4E14\u5C01\u88C5\u4E86\u76F8\u5E94\u64CD\u4F5C\u7684\u6570\u636E\u5143\u7D20\u96C6\u5408\u3002\u5B83\u5305\u542B\u4E09\u65B9\u9762\u7684\u5185\u5BB9\uFF0C\u903B\u8F91\u5173\u7CFB\u3001\u5B58\u50A8\u5173\u7CFB\u53CA\u64CD\u4F5C\u3002\u4E0D\u540C\u79CD\u7C7B\u7684\u6570\u636E\u7ED3\u6784\u9002\u5408\u4E8E\u4E0D\u540C\u79CD\u7C7B\u7684\u5E94\u7528\uFF0C\u800C\u90E8\u5206\u751A\u81F3\u4E13\u95E8\u7528\u4E8E\u7279\u5B9A\u7684\u4F5C\u4E1A\u4EFB\u52A1\u3002\u4F8B\u5982\uFF0C\u8BA1\u7B97\u673A\u7F51\u7EDC\u4F9D\u8D56\u4E8E\u8DEF\u7531\u8868\u8FD0\u4F5C\uFF0CB \u6811\u9AD8\u5EA6\u9002\u7528\u4E8E\u6570\u636E\u5E93\u7684\u5C01\u88C5\u3002</p></blockquote><p>\u83DC\u9E1F\u6559\u7A0B\u4E0A\u5BF9\u6570\u636E\u7ED3\u6784\u7684\u5B9A\u4E49\u6211\u89C9\u5F97\u8FD8\u662F\u86EE\u6B63\u5F0F\uFF08\u5B98\u65B9\uFF09\u7684\uFF0C\u8BF4\u4EBA\u8BDD\u5C31\u662F\uFF0C<strong>\u6570\u636E\u7ED3\u6784\u5C31\u662F\u628A\u4E00\u5806\u6570\u636E\uFF0C\u6309\u7167\u67D0\u79CD\u683C\u5F0F\u63C9\u6210\u4E00\u5768</strong>\u3002</p><p>\u5927\u5BB6\u559C\u6B22\u5403\u5BAB\u4FDD\u9E21\u4E01\u5417\uFF1F</p><p>\u53CD\u6B63\u6211\u633A\u559C\u6B22\u8FD9\u9053\u83DC\u7684\u3002\u6211\u5C31\u4EE5\u5BAB\u4FDD\u9E21\u4E01\u4E3A\u4F8B\uFF0C\u6765\u8BB2\u4E00\u8BB2\u6570\u636E\u7ED3\u6784\u5427\u3002\u7EF4\u57FA\u767E\u79D1\u4E0A\u662F\u8FD9\u6837\u5B9A\u4E49\u7684\u3002</p><blockquote><p>\u5BAB\u4FDD\u9E21\u4E01\uFF08\u82F1\u8BED\uFF1AKung Pao chicken\u6216Kung-Pao Chicken\uFF09\uFF0C\u53C8\u79F0\u5BAB\u7206\u9E21\u4E01\uFF0C\u5448\u7CCA\u8FA3\u8354\u679D\u5473\uFF0C\u6E90\u4E8E\u9ED4\u83DC\u3001\u6D41\u4F20\u81F3\u9C81\u800C\u540E\u6210\u4E8E\u5DDD\u83DC\u7684\u4E00\u9053\u5DDD\u5473\u540D\u83DC\u3002\u8D35\u5DDE\u3001\u5C71\u4E1C\u548C\u56DB\u5DDD\u4E09\u5730\u5BF9\u8FD9\u9053\u83DC\u7684\u505A\u6CD5\u4E0D\u5B8C\u5168\u4E00\u6837\uFF0C\u79F0\u547C\u4E5F\u6709\u5DEE\u5F02\u3002\u8D35\u5DDE\u79F0\u4E3A\u7CCA\u8FA3\u5B50\u9E21\u4E01\uFF0C\u5C71\u4E1C\u5219\u540D\u4E3A\u9171\u7206\u9E21\u4E01\uFF0C\u800C\u56DB\u5DDD\u662F\u4EE5\u5BAB\u4FDD\u9E21\u4E01\u4E3A\u540D\u7684\u3002</p></blockquote><p>\u6765\uFF0C\u62BD\u8C61\u4E0B\u5BAB\u4FDD\u9E21\u4E01\u3002</p><div class="language-c ext-c line-numbers-mode"><pre class="language-c"><code><span class="token keyword">struct</span> <span class="token class-name">KungPaoChicken</span> <span class="token punctuation">{</span>
   \u9E21\u8089 <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token punctuation">]</span>
   \u82B1\u751F <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token punctuation">]</span>
   \u8471\u6BB5 <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token punctuation">]</span>
diff --git a/dist/assets/c.html.1f2463e6.js b/dist/assets/c.html.6387955f.js
similarity index 99%
rename from dist/assets/c.html.1f2463e6.js
rename to dist/assets/c.html.6387955f.js
index 53c27e9f..b0c46540 100644
--- a/dist/assets/c.html.1f2463e6.js
+++ b/dist/assets/c.html.6387955f.js
@@ -1 +1 @@
-import{_ as l}from"./plugin-vue_export-helper.21dcd24c.js";import{r as a,o as n,c as p,a as e,b as i,e as r,d as t}from"./app.a0271b9c.js";const s={},c=r('<h1 id="c\u8BED\u8A00\u5B66\u4E60\u8DEF\u7EBF-\u5EFA\u8BAE\u6536\u85CF" tabindex="-1"><a class="header-anchor" href="#c\u8BED\u8A00\u5B66\u4E60\u8DEF\u7EBF-\u5EFA\u8BAE\u6536\u85CF" aria-hidden="true">#</a> C\u8BED\u8A00\u5B66\u4E60\u8DEF\u7EBF\uFF08\u5EFA\u8BAE\u6536\u85CF\u{1F44D}\uFF09</h1><p>\u6211\u82B1\u65F6\u95F4\u5199\u8FD9\u7BC7\u6587\u7AE0\u6765\u7ED9\u5927\u5BB6\u8BB2C\u8BED\u8A00\u7684\u5B66\u4E60\uFF0C\u5F53\u7136\u662F\u5E0C\u671B\u5927\u5BB6\u771F\u6B63\u7684\u5B66\u4F1A\u3001\u5B66\u61C2C\u8BED\u8A00\uFF0C\u5E76\u80FD\u591F\u771F\u6B63\u611F\u89C9\u5230\u5B83\u7684\u7528\u5904\u3002</p><p>\u6211\u4EEC\u5148\u4ECE C \u8BED\u8A00\u7684\u5165\u95E8\u5F00\u59CB\uFF0C\u603B\u5171<strong>\u4E00\u672C\u4E66\uFF0C\u4E24\u95E8\u89C6\u9891\u8BFE</strong>\u3002</p><h3 id="_01-\u962E\u4E00\u5CF0\u8001\u5E08\u7684-c\u8BED\u8A00\u5165\u95E8\u6559\u7A0B" tabindex="-1"><a class="header-anchor" href="#_01-\u962E\u4E00\u5CF0\u8001\u5E08\u7684-c\u8BED\u8A00\u5165\u95E8\u6559\u7A0B" aria-hidden="true">#</a> 01\uFF09\u962E\u4E00\u5CF0\u8001\u5E08\u7684 C\u8BED\u8A00\u5165\u95E8\u6559\u7A0B</h3><p>\u962E\u4E00\u5CF0\u8001\u5E08\u7684 C\u8BED\u8A00\u5165\u95E8\u8BFE\uFF0C\u6211\u7B2C\u4E00\u65F6\u95F4\u5C31\u62DC\u8BFB\u4E86\u4E00\u904D\uFF0C\u53D7\u76CA\u532A\u6D45\uFF01\u53EF\u4EE5\u8BF4\u76EE\u524D\u6211\u89C1\u5230\u7684\u6700\u597D\u7684 C\u8BED\u8A00\u5165\u95E8\u6559\u7A0B\u4E86\uFF0C\u6CA1\u6709\u4E4B\u4E00\uFF01\u56FD\u5185\u7684\u7EDD\u5927\u591A\u6570\u9AD8\u6821\uFF0C\u5927\u4E00\u90FD\u4F1A\u5B89\u6392 C \u8BED\u8A00\u8FD9\u95E8\u8BFE\uFF0C\u962E\u4E00\u5CF0\u4E86\u8001\u5E08\u7684\u8FD9\u4EFD\u300AC\u8BED\u8A00\u5165\u95E8\u6559\u7A0B\u300B\uFF0C\u7EDD\u5BF9\u662F\u798F\u97F3\u3002</p><p>\u6211\u7B2C\u4E00\u65F6\u95F4\u5C31\u6574\u7406\u4E86\u4E00\u4EFD PDF \u7248\uFF0C\u622A\u4E2A\u56FE\u5927\u5BB6\u53EF\u4EE5\u611F\u53D7\u4E0B\u3002\u6211\u5BF9\u8FD9\u4EFD\u6559\u7A0B\u975E\u5E38\u6EE1\u610F\uFF0C\u8BE5\u8BB2\u7684\u5730\u65B9\u90FD\u8BB2\u5230\u4E86\uFF0C\u793A\u4F8B\u4E5F\u7ED9\u4E86\u5F88\u591A\uFF0C\u5BF9\u521D\u5B66\u8005\u6765\u8BF4\uFF0C\u5165\u95E8\u5FC5\u5907\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/c-1.png" alt=""></p><p>\u76F4\u63A5\u957F\u6309\u8BC6\u522B/\u626B\u63CF\u4E0B\u65B9\u4E8C\u7EF4\u7801\uFF0C\u5173\u6CE8\u540E\u56DE\u590D \u300C<strong>08</strong>\u300D \u4E0B\u8F7D\u8FD9\u4EFD PDF \u5427\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongzhonghao.png" alt="\u626B\u7801\u5173\u6CE8\u540E\u56DE\u590D\u300C08\u300D\u5173\u952E\u5B57"></p><h3 id="_02-\u7FC1\u607A\u6559\u6388\u7684c\u8BED\u8A00\u89C6\u9891\u8BFE" tabindex="-1"><a class="header-anchor" href="#_02-\u7FC1\u607A\u6559\u6388\u7684c\u8BED\u8A00\u89C6\u9891\u8BFE" aria-hidden="true">#</a> 02\uFF09\u7FC1\u607A\u6559\u6388\u7684C\u8BED\u8A00\u89C6\u9891\u8BFE</h3><p>\u53EF\u4EE5\u5148\u770B\u962E\u4E00\u5CF0\u8001\u5E08\u7684\u300AC\u8BED\u8A00\u5165\u95E8\u6559\u7A0B\u300B\uFF0C\u4E5F\u53EF\u4EE5\u5148\u82B1\u4E00\u4E2A\u6708\u7684\u65F6\u95F4\uFF0C\u53BB mooc \u628A\u300A\u7A0B\u5E8F\u8BBE\u8BA1\u5165\u95E8 C\u8BED\u8A00\u300B\u8FD9\u95E8\u89C6\u9891\u8BFE\u8FC7\u4E00\u904D\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/c-2.png" alt=""></p>',12),g=t("\u89C6\u9891\u5730\u5740\uFF1A"),h={href:"https://www.icourse163.org/course/ZJU-199001",target:"_blank",rel:"noopener noreferrer"},u=t("https://www.icourse163.org/course/ZJU-199001"),b=e("p",null,"\u770B\u5B8C\u8FD9\u5957\u89C6\u9891\uFF0C\u5927\u5BB6\u81F3\u5C11\u80FD\u5B66\u5230\uFF1A",-1),_=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/c-3.jpg",alt:""})],-1),d=e("p",null,"\u5B66\u5B8C\u8FD9\u95E8\u5165\u95E8\u8BFE\u540E\uFF0C\u53EF\u4EE5\u518D\u770B\u4E00\u4E0B\u8FDB\u9636\u7248\u7684\u3002\u8BFE\u7A0B\u4EE5\u4E00\u4E2A Windows \u4E0B\u7684\u56FE\u5F62\u6E38\u620F\u7A0B\u5E8F\u5165\u624B\uFF0C\u501F\u52A9\u4E00\u4E2A C \u8BED\u8A00\u56FE\u5F62\u5E93\uFF0C\u5C55\u5F00\u5168\u90E8\u7684\u6559\u5B66\u5185\u5BB9\uFF0C\u975E\u5E38\u6709\u8DA3\u3002",-1),m=t("\u89C6\u9891\u5730\u5740\uFF1A"),C={href:"https://www.icourse163.org/course/ZJU-200001",target:"_blank",rel:"noopener noreferrer"},x=t("https://www.icourse163.org/course/ZJU-200001"),v=r('<p>\u8FD9\u91CC\u7ED9\u5927\u5BB6\u4E00\u70B9\u770B\u89C6\u9891\u7684\u5C0F\u5EFA\u8BAE\u54C8\u3002</p><p>\u8001\u8001\u5B9E\u5B9E\u542C\u8BFE\uFF0C\u505A\u7B14\u8BB0\uFF0C\u4E25\u683C\u6309\u7167\u7FC1\u607A\u8001\u5E08\u7684\u8981\u6C42\u5B8C\u6210\u4F5C\u4E1A\u3002\u5982\u679C\u8FD8\u6709\u4F59\u529B\uFF0C\u90A3\u4E48\u8003\u8651\u4E00\u4E0B\u8BFE\u540E\u7684\u601D\u8003\u9898\u3002\u5982\u679C\u6CA1\u6709\u601D\u8DEF\uFF0C\u5148\u770B\u4E00\u4E0B\u522B\u4EBA\u7684\u8BA8\u8BBA\uFF0C\u7136\u540E\u6E10\u6E10\u5B66\u4F1A\u81EA\u5DF1\u603B\u7ED3\u3002</p><p><strong>\u6CA1\u6709\u5B66\u4E0D\u4F1A\u7684 C \u8BED\u8A00\uFF0C\u53EA\u6709\u4E0D\u5BF9\u7684\u5B66\u4E60\u59FF\u52BF</strong>\u3002</p><h3 id="_03-\u4E3A\u4EC0\u4E48\u8981\u5B66\u4E60-c\u8BED\u8A00" tabindex="-1"><a class="header-anchor" href="#_03-\u4E3A\u4EC0\u4E48\u8981\u5B66\u4E60-c\u8BED\u8A00" aria-hidden="true">#</a> 03\uFF09\u4E3A\u4EC0\u4E48\u8981\u5B66\u4E60 C\u8BED\u8A00\uFF1F</h3><p>\u5F88\u591A\u521D\u5B66\u8005\u4F1A\u611F\u5230\u56F0\u60D1\uFF0CC \u8BED\u8A00\u65E2\u7136\u5DE5\u4F5C\u5C97\u4F4D\u4E0D\u591A\uFF0C\u4E3A\u4EC0\u4E48\u8FD8\u8981\u5B66\u4E60\u5462\uFF1F\u5B66\u4E60 C\u8BED\u8A00\u80FD\u505A\u4EC0\u4E48\uFF1F\u5982\u679C\u8FD9\u4E24\u4E2A\u95EE\u9898\u641E\u4E0D\u6E05\u695A\u7684\u8BDD\uFF0C\u5B66\u4E60\u7684\u8FC7\u7A0B\u4E2D\u5C31\u5BB9\u6613\u8131\u9776\u3002</p><p>C\u8BED\u8A00\u662F\u7531\u8D1D\u5C14\u5B9E\u9A8C\u5BA4\u7684 Dennis Ritchie \u5728 1969 \u5E74~ 1973 \u5E74\u95F4\u53D1\u660E\u521B\u9020\u7684\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/c-1.jpg" alt="C\u8BED\u8A00\u4E4B\u7236"></p><p>Dennis Ritchie\u662F\u8FD9\u6837\u8BC4\u4EF7\u81EA\u5DF1\u7684\u4EB2\u513F\u5B50\u7684\uFF1A\u201C<strong>\u53E4\u602A\u7684\u3001\u6709\u7F3A\u9677\u7684\uFF0C\u4F46\u540C\u65F6\u4E5F\u662F\u4E00\u4E2A\u5DE8\u5927\u7684\u6210\u529F</strong>\u3002\u201D\u8FD9\u53E5\u8BC4\u8BED\u8FD8\u662F\u975E\u5E38\u4E2D\u80AF\u7684\u3002</p><p><strong>\u7B2C\u4E00\uFF0CC\u8BED\u8A00\u5728\u8BA1\u7B97\u673A\u9886\u57DF\u8D77\u5230\u4E86\u627F\u4E0A\u542F\u4E0B\u7684\u4F5C\u7528</strong>\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/c-4.jpg" alt=""></p><p>C\u8BED\u8A00\u975E\u5E38\u7684\u7B80\u6D01\uFF0C\u51E0\u4E4E\u6CA1\u6709\u4EFB\u4F55\u5197\u4F59\u3002\u4E0A\u624B\u96BE\u5EA6\u51E0\u4E4E\u4E3A 0\uFF0C\u9664\u4E86\u6307\u9488\u96BE\u4EE5\u88AB\u65B0\u624B\u638C\u63E1\u4EE5\u5916\uFF0C\u5176\u4ED6\u7684\u57FA\u7840\u8BED\u6CD5\u90FD\u5F88\u5BB9\u6613\u4E0A\u624B\u3002\u5F88\u591A\u7F16\u7A0B\u8BED\u8A00\u90FD\u53D7\u5230\u4E86C\u8BED\u8A00\u7684\u5F71\u54CD\uFF0C\u6BD4\u5982\u8BF4 Java\u3001C++\u3001C#\u3001Python\u3001Go \u7B49\u7B49\uFF0C\u90A3\u5B66\u4F1A\u4E86 C\u8BED\u8A00\uFF0C\u518D\u5B66\u4E60\u5176\u4ED6\u7684\u7F16\u7A0B\u8BED\u8A00\u5C31\u4F1A\u4E1D\u6ED1\u5F97\u591A\u3002</p><p>\u53E6\u5916\uFF0C\u5927\u90E8\u5206 Unix \u5185\u6838\uFF0C\u4EE5\u53CA\u6240\u6709\u652F\u6491\u5DE5\u5177\u548C\u51FD\u6570\u5E93\u90FD\u662F\u7528 C\u8BED\u8A00\u6765\u7F16\u5199\u7684\u3002\u4EE5\u81F3\u4E8E\u540E\u6765\u51E0\u4E4E\u6240\u6709\u7684\u64CD\u4F5C\u7CFB\u7EDF\u5185\u6838\u90FD\u7528\u5230\u4E86C\u8BED\u8A00\uFF0C\u6BD4\u5982\u8BF4 Windows\u3001Linux\u3001macOS \u7B49\u7B49\u3002\u90A3\u5B66\u4F1A\u4E86 C\u8BED\u8A00\uFF0C\u5C31\u53EF\u4EE5\u5B66\u4E60\u8BA1\u7B97\u673A\u7EC4\u6210\u539F\u7406\u3001\u64CD\u4F5C\u7CFB\u7EDF\u7B49\u7B49\u504F\u57FA\u7840\u7684\u8BA1\u7B97\u673A\u57FA\u7840\u77E5\u8BC6\u3002</p><p>\u300A\u6307\u73AF\u738B\u300B\u91CC\u6709\u8FD9\u6837\u4E00\u53E5\u8BDD\uFF1A\u201Cone ring to them all\u201D\uFF0C\u53EF\u4EE5\u628A ring \u6362\u6210 language\uFF0C\u8FD9\u4E2A language \u5C31\u662FC\u8BED\u8A00\u3002</p><p><strong>\u7B2C\u4E8C\uFF0CC\u8BED\u8A00\u53EF\u4EE5\u7528\u4E8E\u5D4C\u5165\u5F0F\u7CFB\u7EDF\u7684\u5F00\u53D1</strong></p><p>\u9664\u4E86\u7528\u4E8E\u8BA1\u7B97\u673A\u64CD\u4F5C\u7CFB\u7EDF\u7684\u7F16\u5199\uFF0CC\u8BED\u8A00\u73B0\u5728\u4E3B\u8981\u7528\u4E8E\u5D4C\u5165\u5F0F\u7CFB\u7EDF\u7684\u5F00\u53D1\uFF0C\u6C7D\u8F66\u3001\u7167\u76F8\u673A\u3001\u5BB6\u7528\u7535\u5668\u7B49\u8BBE\u5907\u7684\u5E95\u5C42\u7CFB\u7EDF\u90FD\u662F\u7528 C \u8BED\u8A00\u7F16\u5199\u7684\u3002</p><p>C\u8BED\u8A00\u80FD\u591F\u76F4\u63A5\u64CD\u4F5C\u786C\u4EF6\u3001\u7BA1\u7406\u5185\u5B58\u3001\u8DDF\u64CD\u4F5C\u7CFB\u7EDF\u4EA4\u4E92\uFF0C\u8FD9\u4F7F\u5F97\u5B83\u6210\u4E3A\u4E86\u4E00\u79CD\u975E\u5E38\u63A5\u8FD1\u5E95\u5C42\u7684\u7F16\u7A0B\u8BED\u8A00\uFF0C\u975E\u5E38\u9002\u5408\u6709\u6781\u9AD8\u6027\u80FD\u8981\u6C42\u7684\u7A0B\u5E8F\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/c-2.jpg" alt="MATLAB+C\u8BED\u8A00\u6765\u63A7\u5236\u673A\u68B0\u81C2"></p><p><strong>04\uFF09C\u8BED\u8A00\u6838\u5FC3\u77E5\u8BC6\u70B9\u6C47\u603B</strong></p><p>\u4E3A\u4E86\u65B9\u4FBF\u5927\u5BB6\u7684\u5B66\u4E60\uFF0C\u6211\u8FD9\u91CC\u6C47\u603B\u4E00\u4E0B C\u8BED\u8A00\u7684\u6838\u5FC3\u77E5\u8BC6\u70B9\u3002\u5148\u6765\u770B\u6587\u5B57\u7248\u7684\uFF1A</p><ul><li>\u6570\u636E\u7C7B\u578B</li><li>\u8FD0\u7B97\u7B26\u548C\u8868\u8FBE\u5F0F</li><li>\u8F93\u5165\u548C\u8F93\u51FA</li><li>\u6D41\u7A0B\u63A7\u5236</li><li>\u51FD\u6570</li><li>\u6570\u7EC4</li><li>\u6307\u9488</li><li>\u7ED3\u6784\u4F53</li><li>\u6587\u4EF6\u64CD\u4F5C</li><li>\u5185\u5B58\u7BA1\u7406</li></ul><p>\u518D\u6765\u770B\u8BE6\u7EC6\u7248\u7684\u601D\u7EF4\u5BFC\u56FE\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/c-5.png" alt=""></p><p>C\u8BED\u8A00\u6709\u4E24\u4E2A\u5173\u952E\u90E8\u5206\uFF1A</p><p>\u7B2C\u4E00\u662F\u8BED\u6CD5\uFF1A\u4E5F\u662F\u5165\u95E8\u6559\u6750\u91CC\u6700\u770B\u91CD\u7684\u5185\u5BB9\uFF0C\u4E5F\u5C31\u662F\u90A3\u4E9B\u53D8\u91CF\u3001\u6570\u636E\u7C7B\u578B\u3001\u5206\u652F\u5224\u65AD\u3001\u5FAA\u73AF\u3001\u51FD\u6570\u3001\u6307\u9488\u7B49\u7B49\u3002</p><p>\u7B2C\u4E8C\u662F\u51FD\u6570\u5E93\uFF1A\u7B80\u5355\u6765\u8BF4\uFF0C\u51FD\u6570\u5E93\u5C31\u662F\u522B\u4EBA\u7F16\u5199\u597D\u7684 C \u51FD\u6570\uFF0C\u4F60\u53EF\u4EE5\u76F4\u63A5\u62FF\u6765\u8C03\u7528\uFF0C\u6BD4\u5982\u8BF4\u8C03\u7528 <code>printf()</code> \u51FD\u6570\u5C31\u53EF\u4EE5\u5728\u5C4F\u5E55\u4E0A\u6253\u5370\u3002\u5F88\u591A\u4EBA\u53EF\u80FD\u89C9\u5F97\u5E93\u51FD\u6570\u4E0D\u91CD\u8981\uFF0C\u90FD\u662F\u522B\u4EBA\u5C01\u88C5\u597D\u7684\uFF0C\u53EA\u8981\u8BB0\u4F4F\u51FD\u6570\u540D\u5C31\u53EF\u4EE5\u4E86\uFF0C\u4F46\u5176\u5B9E\u6211\u60F3\u8868\u8FBE\u7684\u662F\uFF0C\u5E93\u51FD\u6570\u624D\u662F\u4F60\u5B66\u4E60 C\u8BED\u8A00\u5E76\u5C06\u5176\u5E94\u7528\u4E8E\u5B9E\u8DF5\u7684\u5173\u952E\u3002</p><p>\u56E0\u4E3A\u5B66\u4F1A\u8C03\u7528\u522B\u4EBA\u7684\u5E93\u51FD\u6570\uFF08\u4F8B\u5982malloc\u51FD\u6570\u3001calloc\u51FD\u6570\u3001realloc\u51FD\u6570\u3001free\u51FD\u6570\uFF09\uFF0C\u624D\u6709\u673A\u4F1A\u5199\u51FA\u81EA\u5DF1\u7684\u5E93\u51FD\u6570\uFF0C\u5426\u5219\u4ECE\u96F6\u5F00\u59CB\u64B8\u5B9E\u5728\u662F\u592A\u4E0D\u73B0\u5B9E\u4E86\u3002</p><p><strong>05\uFF09\u5B66\u4E60 C\u8BED\u8A00\u7684\u4E00\u4E9B\u5EFA\u8BAE</strong></p><p>\u4E00\u822C\u6765\u8BF4\uFF0C\u5B66\u4E60 C\u8BED\u8A00\u53EF\u4EE5\u5206\u4E3A\u4EE5\u4E0B 5 \u4E2A\u9636\u6BB5\uFF1A</p><ul><li>1\uFF09\u5B66\u4E60\u57FA\u7840\u8BED\u6CD5</li><li>2\uFF09\u5B66\u4F1A\u4F7F\u7528 C\u8BED\u8A00\u81EA\u5E26\u7684\u5E93\u51FD\u6570\uFF0C\u6BD4\u5982\u8BF4 printf \u7EA7\u522B\u7684</li><li>3\uFF09\u5B66\u4F1A\u4F7F\u7528\u4E00\u4E9B\u57FA\u672C\u7684\u6570\u636E\u7ED3\u6784\u4E0E\u7B97\u6CD5</li><li>4\uFF09\u6709\u4E86\u4E00\u5B9A\u7684 C\u8BED\u8A00\u57FA\u7840\uFF0C\u5F00\u59CB\u5B66\u4E60\u4E00\u4E9B\u8BA1\u7B97\u673A\u4E13\u4E1A\u7684\u6838\u5FC3\u77E5\u8BC6\uFF0C\u6BD4\u5982\u8BF4\u64CD\u4F5C\u7CFB\u7EDF\u3001\u8BA1\u7B97\u673A\u7EC4\u6210\u539F\u7406\u7B49</li><li>5\uFF09\u52A8\u624B\u505A\u51FA\u4E00\u4E9B lab\uFF0C\u9020\u4E00\u4E9B\u7B80\u5355\u7684\u8F6E\u5B50\uFF0C\u5B9E\u73B0\u4E00\u4E9B\u7B80\u5355\u7684\u5C0F\u5E94\u7528</li></ul><p>\u8FD9\u91CC\u63A8\u8350 2 \u4E2A\u84DD\u6865\u4E91\u8BFE\u4E0A\u7684\u514D\u8D39\u5C0F lab\uFF0C\u5927\u5BB6\u53EF\u4EE5\u52A8\u624B\u7EC3\u8D77\u6765\u3002</p><p><strong>1\uFF09\u53EF\u4EE5\u8FDB\u884C\u52A0\u51CF\u4E58\u9664\u7684\u8BA1\u7B97\u5668</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/c-6.jpg" alt=""></p>',32),j=t("\u8BFE\u7A0B\u5730\u5740\uFF1A"),w={href:"https://www.lanqiao.cn/courses/75",target:"_blank",rel:"noopener noreferrer"},f=t("https://www.lanqiao.cn/courses/75"),k=e("p",null,"\u901A\u8FC7\u8FD9\u4E2A lab\uFF0C\u5927\u5BB6\u53EF\u4EE5\u5B66\u5230\uFF1A",-1),J=e("ul",null,[e("li",null,"\u8BA1\u7B97\u5668\u8BBE\u8BA1\u601D\u8DEF"),e("li",null,"C \u8BED\u8A00\u7684\u683C\u5F0F\u68C0\u67E5"),e("li",null,"C \u8BED\u8A00\u8F93\u5165\u4E0E\u8F93\u51FA")],-1),B=e("p",null,[e("strong",null,"2\uFF09\u5B9E\u73B0\u4E00\u4E2A\u5C5E\u4E8E\u81EA\u5DF1\u7684\u7F16\u7A0B\u8BED\u8A00")],-1),q=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/c-7.png",alt:""})],-1),y=t("\u8BFE\u7A0B\u5730\u5740\uFF1A"),P={href:"https://www.shiyanlou.com/courses/670",target:"_blank",rel:"noopener noreferrer"},D=t("https://www.shiyanlou.com/courses/670"),E=r("<p>\u901A\u8FC7\u8FD9\u4E2A lab\uFF0C\u5927\u5BB6\u53EF\u4EE5\u5B66\u5230\uFF1A</p><ul><li>\u89E3\u6790\u5668</li><li>\u6CE2\u5170\u8868\u8FBE\u5F0F</li><li>\u89E3\u6790\u6811\u7684\u8BA1\u7B97</li><li>S-Expression</li><li>\u53D8\u91CF\u5B9A\u4E49\u548C\u4F7F\u7528</li><li>\u6761\u4EF6\u5224\u65AD</li><li>\u6B63\u5219\u8868\u8FBE\u5F0F</li><li>\u9012\u5F52\u5206\u6790\u957F\u5B57\u7B26\u4E32</li><li>\u51FA\u9519\u5904\u7406</li><li>Q-Expression</li><li>\u51FD\u6570</li><li>\u5B57\u7B26\u4E32</li></ul><p>\u8FD9\u4E2A lab \u7FFB\u8BD1\u81EA\u56FD\u5916\u7684 build your own lisp\uFF1A</p>",3),L={href:"https://buildyourownlisp.com/",target:"_blank",rel:"noopener noreferrer"},U=t("https://buildyourownlisp.com/"),N=r('<p>\u5982\u679C\u82F1\u8BED\u529F\u5E95\u6BD4\u8F83\u624E\u5B9E\u7684\u8BDD\uFF0C\u53EF\u4EE5\u76F4\u63A5\u770B\u539F\u7248\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/c-8.png" alt=""></p><p>\u8BA4\u771F\u8DDF\u7740\u505A\u8FD9\u4E9B lab\uFF0C\u771F\u672C\u9886\u5C31\u5B66\u5230\u624B\u4E86\u3002</p><p><strong>06\uFF09\u5B66\u4E60 C\u8BED\u8A00\u7684\u5176\u4ED6\u8D44\u6E90</strong></p><p>\u7ED9\u521D\u4E2D\u751F\u770B\u7684\u300A\u554A\u54C8 C\u8BED\u8A00\u300B\uFF0C\u7B80\u5355\u6613\u61C2\uFF0C\u751F\u52A8\u6709\u8DA3\uFF0C\u867D\u7136\u53EA\u80FD\u5B66\u5230 C\u8BED\u8A00\u7684\u51B0\u5C71\u4E00\u89D2\uFF0C\u4F46\u4E5F\u503C\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/c-9.png" alt=""></p><p>\u7ED9\u9AD8\u4E2D\u751F\u3001\u5927\u4E00\u65B0\u751F\u770B\u7684\u5165\u95E8\u4E66\u300Ac primer plus\u300B\uFF0C\u8BED\u6CD5\u5168\u8986\u76D6\uFF0C\u7EC6\u8282\u591A\uFF0C\u77E5\u8BC6\u70B9\u8BB2\u7684\u6E05\u695A\uFF0C\u7F3A\u70B9\u662F\u7410\u788E\uFF0C\u7EC6\u8282\u5F2F\u5F2F\u7ED5\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/c-10.png" alt=""></p><p>\u8FD8\u6709\u4E00\u672C\u300AC \u7A0B\u5E8F\u8BBE\u8BA1\u8BED\u8A00\u300B\uFF0C\u8FD9\u672C\u4E66\u7684\u4F5C\u8005\u662F C\u8BED\u8A00\u4E4B\u7236\uFF0C\u6240\u4EE5\u5168\u4E66\u8BB2\u7684\u90FD\u662F C\u8BED\u8A00\u7684\u6838\u5FC3\u3002\u4EE3\u7801\u793A\u4F8B\u5927\u591A\u90FD\u662F\u5E93\u51FD\u6570\u7684\u5B9E\u73B0\u65B9\u6CD5\uFF0C\u5185\u5BB9\u7B80\u6D01\u660E\u4E86\uFF0C\u5E72\u51C0\u5229\u843D\uFF0C\u6CA1\u6709\u5E9F\u8BDD\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/c-11.png" alt=""></p><p>\u7ED9</p><ul><li>\u60F3\u6210\u4E3A\u5927\u4F6C\u7684\u4EBA</li><li>\u60F3\u8FDB\u9636 C\u8BED\u8A00</li><li>\u60F3\u7406\u89E3\u6307\u9488\u548C\u5185\u5B58</li><li>\u60F3\u641E\u61C2 Linux \u5185\u6838</li><li>\u60F3\u641E\u57FA\u7840\u8BBE\u5907\u7684</li><li>\u60F3\u641E\u5355\u7247\u673A\u7684</li><li>\u60F3\u8FDB\u5FAE\u8F6F\u6539\u8FDB Windows \u7684</li><li>\u60F3\u641E\u8D34\u8FD1\u751F\u6D3B\u786C\u4EF6\u7684\uFF0C\u6BD4\u5982\u8BF4\u95F9\u949F\u3001\u8BA1\u65F6\u5668\u3001\u7B80\u5355\u7684\u673A\u5668\u4EBA</li></ul><p>\u770B\u7684\u8FDB\u9636\u4E66\u300AC \u9677\u9631\u4E0E\u7F3A\u9677\u300B\u3001\u300AC \u4E13\u5BB6\u7F16\u7A0B\u300B\u3001\u300AC \u548C\u6307\u9488\u300B</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/c-12.png" alt=""></p><p>\u5C3D\u7BA1\u6211\u4E0D\u63A8\u8350\u5927\u5BB6\u770B\u4E66\u5165\u95E8\uFF0C\u4F46\u6211\u77E5\u9053\u5F88\u591A\u8BFB\u8005\u8FD8\u662F\u559C\u6B22\u901A\u8FC7\u770B\u4E66\u7684\u65B9\u5F0F\u5B66\u4E60\u3002\u76F4\u63A5\u957F\u6309\u626B\u63CF\u4E0B\u65B9\u4E8C\u7EF4\u7801\uFF0C\u5173\u6CE8\u540E\u56DE\u590D \u300C<strong>C</strong>\u300D \u4E0B\u8F7D\u8FD9 PDF \u7248\u5427\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongzhonghao.png" alt="\uFF08\u957F\u6309\u626B\u7801\u8BC6\u522B\uFF09"></p><p>\u66F4\u591A C\u8BED\u8A00\u7684\u5B66\u4E60\u8D44\u6599\uFF0C\u53EF\u4EE5\u76F4\u63A5\u6233\u6211\u6574\u7406\u7684\u8FD9\u4E2A GitHub/\u7801\u4E91\u4ED3\u5E93\u2014\u2014\u{1F4DA}\u7A0B\u5E8F\u5458\u5FC5\u8BFB\u4E66\u5355\u6574\u7406\uFF0C\u9644\u4E0B\u8F7D\u5730\u5740\uFF0C\u91CC\u9762\u6709\u5927\u91CF\u7684 C\u8BED\u8A00\u5B66\u4E60\u8D44\u6599\u3002</p>',17),V=t("GitHub \u5730\u5740\uFF1A"),Z={href:"https://github.com/itwanger/JavaBooks#c",target:"_blank",rel:"noopener noreferrer"},z=t("https://github.com/itwanger/JavaBooks"),F=t("\u7801\u4E91\u5730\u5740\uFF1A"),G={href:"https://gitee.com/itwanger/JavaBooks#c",target:"_blank",rel:"noopener noreferrer"},S=t("https://gitee.com/itwanger/JavaBooks"),W=r('<p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/c-books.jpg" alt=""></p><p>\u7B80\u5355\u7F57\u5217\u4E00\u4E0B\uFF1A</p><ul><li>\u6DF1\u5EA6\u63A2\u7D22C \u5BF9\u8C61\u6A21\u578B</li><li>\u6570\u636E\u7ED3\u6784\u4E0E\u7B97\u6CD5\u5206\u6790--C\u8BED\u8A00\u63CF\u8FF0</li><li>C Primer Plus\uFF08\u7B2C\u4E94\u7248\uFF09</li><li>C\u7A0B\u5E8F\u8BBE\u8BA1\u8BED\u8A00\uFF08\u7B2C\u4E8C\u7248\uFF0C\u4E2D\u6587\u7248\uFF09</li><li>C\u548C\u6307\u9488</li><li>C\u9677\u9631\u4E0E\u7F3A\u9677</li><li>C\u4E13\u5BB6\u7F16\u7A0B</li></ul><hr><p>\u5230\u6B64\u4E3A\u6B62\uFF0CC\u8BED\u8A00\u7684\u91CD\u70B9\u5C31\u5168\u90E8\u5212\u51FA\u6765\u4E86\uFF0C\u5269\u4E0B\u7684\u5B66\u4E60\u5C31\u4EA4\u7ED9\u5927\u5BB6\u4E86\u3002\u6700\u540E\uFF0C\u4E8C\u54E5\u518D\u5520\u53E8\u51E0\u53E5\uFF1A</p><p>1\u3001\u81EA\u5B66\u624D\u662F\u786C\u9053\u7406\u3002\u5F3A\u5927\u7684\u81EA\u5B66\u80FD\u529B\u662F\u72EC\u81EA\u89E3\u51B3\u95EE\u9898\u7684\u6839\u672C\uFF0C\u7A0B\u5E8F\u5458\u9700\u8981\u62E5\u6709\u5F3A\u5927\u7684\u81EA\u5B66\u80FD\u529B\u3002</p><p>2\u3001\u4E00\u4E2A\u4EBA\u53EF\u4EE5\u8D70\u5F97\u5F88\u5FEB\uFF0C\u4F46\u4E00\u7FA4\u4EBA\u624D\u80FD\u8D70\u7684\u66F4\u8FDC\u3002\u6700\u597D\u52A0\u5165\u4E00\u4E9B\u6709\u6C1B\u56F4\u7684\u6280\u672F\u4EA4\u6D41\u7FA4\uFF0C\u7ED3\u4EA4\u4E00\u4E24\u4E2A\u6709\u80FD\u529B\u7684\u540C\u9636\u6BB5\u7684\u4EBA\uFF0C\u5207\u78CB\u7CBE\u8FDB\u4E00\u4E0B\u3002</p><p>3\u3001\u5165\u95E8\u9636\u6BB5\uFF0Ccoding 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Ritchie\u662F\u8FD9\u6837\u8BC4\u4EF7\u81EA\u5DF1\u7684\u4EB2\u513F\u5B50\u7684\uFF1A\u201C<strong>\u53E4\u602A\u7684\u3001\u6709\u7F3A\u9677\u7684\uFF0C\u4F46\u540C\u65F6\u4E5F\u662F\u4E00\u4E2A\u5DE8\u5927\u7684\u6210\u529F</strong>\u3002\u201D\u8FD9\u53E5\u8BC4\u8BED\u8FD8\u662F\u975E\u5E38\u4E2D\u80AF\u7684\u3002</p><p><strong>\u7B2C\u4E00\uFF0CC\u8BED\u8A00\u5728\u8BA1\u7B97\u673A\u9886\u57DF\u8D77\u5230\u4E86\u627F\u4E0A\u542F\u4E0B\u7684\u4F5C\u7528</strong>\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/c-4.jpg" alt=""></p><p>C\u8BED\u8A00\u975E\u5E38\u7684\u7B80\u6D01\uFF0C\u51E0\u4E4E\u6CA1\u6709\u4EFB\u4F55\u5197\u4F59\u3002\u4E0A\u624B\u96BE\u5EA6\u51E0\u4E4E\u4E3A 0\uFF0C\u9664\u4E86\u6307\u9488\u96BE\u4EE5\u88AB\u65B0\u624B\u638C\u63E1\u4EE5\u5916\uFF0C\u5176\u4ED6\u7684\u57FA\u7840\u8BED\u6CD5\u90FD\u5F88\u5BB9\u6613\u4E0A\u624B\u3002\u5F88\u591A\u7F16\u7A0B\u8BED\u8A00\u90FD\u53D7\u5230\u4E86C\u8BED\u8A00\u7684\u5F71\u54CD\uFF0C\u6BD4\u5982\u8BF4 Java\u3001C++\u3001C#\u3001Python\u3001Go \u7B49\u7B49\uFF0C\u90A3\u5B66\u4F1A\u4E86 C\u8BED\u8A00\uFF0C\u518D\u5B66\u4E60\u5176\u4ED6\u7684\u7F16\u7A0B\u8BED\u8A00\u5C31\u4F1A\u4E1D\u6ED1\u5F97\u591A\u3002</p><p>\u53E6\u5916\uFF0C\u5927\u90E8\u5206 Unix \u5185\u6838\uFF0C\u4EE5\u53CA\u6240\u6709\u652F\u6491\u5DE5\u5177\u548C\u51FD\u6570\u5E93\u90FD\u662F\u7528 C\u8BED\u8A00\u6765\u7F16\u5199\u7684\u3002\u4EE5\u81F3\u4E8E\u540E\u6765\u51E0\u4E4E\u6240\u6709\u7684\u64CD\u4F5C\u7CFB\u7EDF\u5185\u6838\u90FD\u7528\u5230\u4E86C\u8BED\u8A00\uFF0C\u6BD4\u5982\u8BF4 Windows\u3001Linux\u3001macOS \u7B49\u7B49\u3002\u90A3\u5B66\u4F1A\u4E86 C\u8BED\u8A00\uFF0C\u5C31\u53EF\u4EE5\u5B66\u4E60\u8BA1\u7B97\u673A\u7EC4\u6210\u539F\u7406\u3001\u64CD\u4F5C\u7CFB\u7EDF\u7B49\u7B49\u504F\u57FA\u7840\u7684\u8BA1\u7B97\u673A\u57FA\u7840\u77E5\u8BC6\u3002</p><p>\u300A\u6307\u73AF\u738B\u300B\u91CC\u6709\u8FD9\u6837\u4E00\u53E5\u8BDD\uFF1A\u201Cone ring to them all\u201D\uFF0C\u53EF\u4EE5\u628A ring \u6362\u6210 language\uFF0C\u8FD9\u4E2A language \u5C31\u662FC\u8BED\u8A00\u3002</p><p><strong>\u7B2C\u4E8C\uFF0CC\u8BED\u8A00\u53EF\u4EE5\u7528\u4E8E\u5D4C\u5165\u5F0F\u7CFB\u7EDF\u7684\u5F00\u53D1</strong></p><p>\u9664\u4E86\u7528\u4E8E\u8BA1\u7B97\u673A\u64CD\u4F5C\u7CFB\u7EDF\u7684\u7F16\u5199\uFF0CC\u8BED\u8A00\u73B0\u5728\u4E3B\u8981\u7528\u4E8E\u5D4C\u5165\u5F0F\u7CFB\u7EDF\u7684\u5F00\u53D1\uFF0C\u6C7D\u8F66\u3001\u7167\u76F8\u673A\u3001\u5BB6\u7528\u7535\u5668\u7B49\u8BBE\u5907\u7684\u5E95\u5C42\u7CFB\u7EDF\u90FD\u662F\u7528 C \u8BED\u8A00\u7F16\u5199\u7684\u3002</p><p>C\u8BED\u8A00\u80FD\u591F\u76F4\u63A5\u64CD\u4F5C\u786C\u4EF6\u3001\u7BA1\u7406\u5185\u5B58\u3001\u8DDF\u64CD\u4F5C\u7CFB\u7EDF\u4EA4\u4E92\uFF0C\u8FD9\u4F7F\u5F97\u5B83\u6210\u4E3A\u4E86\u4E00\u79CD\u975E\u5E38\u63A5\u8FD1\u5E95\u5C42\u7684\u7F16\u7A0B\u8BED\u8A00\uFF0C\u975E\u5E38\u9002\u5408\u6709\u6781\u9AD8\u6027\u80FD\u8981\u6C42\u7684\u7A0B\u5E8F\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/c-2.jpg" alt="MATLAB+C\u8BED\u8A00\u6765\u63A7\u5236\u673A\u68B0\u81C2"></p><p><strong>04\uFF09C\u8BED\u8A00\u6838\u5FC3\u77E5\u8BC6\u70B9\u6C47\u603B</strong></p><p>\u4E3A\u4E86\u65B9\u4FBF\u5927\u5BB6\u7684\u5B66\u4E60\uFF0C\u6211\u8FD9\u91CC\u6C47\u603B\u4E00\u4E0B C\u8BED\u8A00\u7684\u6838\u5FC3\u77E5\u8BC6\u70B9\u3002\u5148\u6765\u770B\u6587\u5B57\u7248\u7684\uFF1A</p><ul><li>\u6570\u636E\u7C7B\u578B</li><li>\u8FD0\u7B97\u7B26\u548C\u8868\u8FBE\u5F0F</li><li>\u8F93\u5165\u548C\u8F93\u51FA</li><li>\u6D41\u7A0B\u63A7\u5236</li><li>\u51FD\u6570</li><li>\u6570\u7EC4</li><li>\u6307\u9488</li><li>\u7ED3\u6784\u4F53</li><li>\u6587\u4EF6\u64CD\u4F5C</li><li>\u5185\u5B58\u7BA1\u7406</li></ul><p>\u518D\u6765\u770B\u8BE6\u7EC6\u7248\u7684\u601D\u7EF4\u5BFC\u56FE\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/c-5.png" alt=""></p><p>C\u8BED\u8A00\u6709\u4E24\u4E2A\u5173\u952E\u90E8\u5206\uFF1A</p><p>\u7B2C\u4E00\u662F\u8BED\u6CD5\uFF1A\u4E5F\u662F\u5165\u95E8\u6559\u6750\u91CC\u6700\u770B\u91CD\u7684\u5185\u5BB9\uFF0C\u4E5F\u5C31\u662F\u90A3\u4E9B\u53D8\u91CF\u3001\u6570\u636E\u7C7B\u578B\u3001\u5206\u652F\u5224\u65AD\u3001\u5FAA\u73AF\u3001\u51FD\u6570\u3001\u6307\u9488\u7B49\u7B49\u3002</p><p>\u7B2C\u4E8C\u662F\u51FD\u6570\u5E93\uFF1A\u7B80\u5355\u6765\u8BF4\uFF0C\u51FD\u6570\u5E93\u5C31\u662F\u522B\u4EBA\u7F16\u5199\u597D\u7684 C \u51FD\u6570\uFF0C\u4F60\u53EF\u4EE5\u76F4\u63A5\u62FF\u6765\u8C03\u7528\uFF0C\u6BD4\u5982\u8BF4\u8C03\u7528 <code>printf()</code> \u51FD\u6570\u5C31\u53EF\u4EE5\u5728\u5C4F\u5E55\u4E0A\u6253\u5370\u3002\u5F88\u591A\u4EBA\u53EF\u80FD\u89C9\u5F97\u5E93\u51FD\u6570\u4E0D\u91CD\u8981\uFF0C\u90FD\u662F\u522B\u4EBA\u5C01\u88C5\u597D\u7684\uFF0C\u53EA\u8981\u8BB0\u4F4F\u51FD\u6570\u540D\u5C31\u53EF\u4EE5\u4E86\uFF0C\u4F46\u5176\u5B9E\u6211\u60F3\u8868\u8FBE\u7684\u662F\uFF0C\u5E93\u51FD\u6570\u624D\u662F\u4F60\u5B66\u4E60 C\u8BED\u8A00\u5E76\u5C06\u5176\u5E94\u7528\u4E8E\u5B9E\u8DF5\u7684\u5173\u952E\u3002</p><p>\u56E0\u4E3A\u5B66\u4F1A\u8C03\u7528\u522B\u4EBA\u7684\u5E93\u51FD\u6570\uFF08\u4F8B\u5982malloc\u51FD\u6570\u3001calloc\u51FD\u6570\u3001realloc\u51FD\u6570\u3001free\u51FD\u6570\uFF09\uFF0C\u624D\u6709\u673A\u4F1A\u5199\u51FA\u81EA\u5DF1\u7684\u5E93\u51FD\u6570\uFF0C\u5426\u5219\u4ECE\u96F6\u5F00\u59CB\u64B8\u5B9E\u5728\u662F\u592A\u4E0D\u73B0\u5B9E\u4E86\u3002</p><p><strong>05\uFF09\u5B66\u4E60 C\u8BED\u8A00\u7684\u4E00\u4E9B\u5EFA\u8BAE</strong></p><p>\u4E00\u822C\u6765\u8BF4\uFF0C\u5B66\u4E60 C\u8BED\u8A00\u53EF\u4EE5\u5206\u4E3A\u4EE5\u4E0B 5 \u4E2A\u9636\u6BB5\uFF1A</p><ul><li>1\uFF09\u5B66\u4E60\u57FA\u7840\u8BED\u6CD5</li><li>2\uFF09\u5B66\u4F1A\u4F7F\u7528 C\u8BED\u8A00\u81EA\u5E26\u7684\u5E93\u51FD\u6570\uFF0C\u6BD4\u5982\u8BF4 printf \u7EA7\u522B\u7684</li><li>3\uFF09\u5B66\u4F1A\u4F7F\u7528\u4E00\u4E9B\u57FA\u672C\u7684\u6570\u636E\u7ED3\u6784\u4E0E\u7B97\u6CD5</li><li>4\uFF09\u6709\u4E86\u4E00\u5B9A\u7684 C\u8BED\u8A00\u57FA\u7840\uFF0C\u5F00\u59CB\u5B66\u4E60\u4E00\u4E9B\u8BA1\u7B97\u673A\u4E13\u4E1A\u7684\u6838\u5FC3\u77E5\u8BC6\uFF0C\u6BD4\u5982\u8BF4\u64CD\u4F5C\u7CFB\u7EDF\u3001\u8BA1\u7B97\u673A\u7EC4\u6210\u539F\u7406\u7B49</li><li>5\uFF09\u52A8\u624B\u505A\u51FA\u4E00\u4E9B lab\uFF0C\u9020\u4E00\u4E9B\u7B80\u5355\u7684\u8F6E\u5B50\uFF0C\u5B9E\u73B0\u4E00\u4E9B\u7B80\u5355\u7684\u5C0F\u5E94\u7528</li></ul><p>\u8FD9\u91CC\u63A8\u8350 2 \u4E2A\u84DD\u6865\u4E91\u8BFE\u4E0A\u7684\u514D\u8D39\u5C0F lab\uFF0C\u5927\u5BB6\u53EF\u4EE5\u52A8\u624B\u7EC3\u8D77\u6765\u3002</p><p><strong>1\uFF09\u53EF\u4EE5\u8FDB\u884C\u52A0\u51CF\u4E58\u9664\u7684\u8BA1\u7B97\u5668</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/c-6.jpg" alt=""></p>',32),j=t("\u8BFE\u7A0B\u5730\u5740\uFF1A"),w={href:"https://www.lanqiao.cn/courses/75",target:"_blank",rel:"noopener noreferrer"},f=t("https://www.lanqiao.cn/courses/75"),k=e("p",null,"\u901A\u8FC7\u8FD9\u4E2A lab\uFF0C\u5927\u5BB6\u53EF\u4EE5\u5B66\u5230\uFF1A",-1),J=e("ul",null,[e("li",null,"\u8BA1\u7B97\u5668\u8BBE\u8BA1\u601D\u8DEF"),e("li",null,"C \u8BED\u8A00\u7684\u683C\u5F0F\u68C0\u67E5"),e("li",null,"C \u8BED\u8A00\u8F93\u5165\u4E0E\u8F93\u51FA")],-1),B=e("p",null,[e("strong",null,"2\uFF09\u5B9E\u73B0\u4E00\u4E2A\u5C5E\u4E8E\u81EA\u5DF1\u7684\u7F16\u7A0B\u8BED\u8A00")],-1),q=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/c-7.png",alt:""})],-1),y=t("\u8BFE\u7A0B\u5730\u5740\uFF1A"),P={href:"https://www.shiyanlou.com/courses/670",target:"_blank",rel:"noopener noreferrer"},D=t("https://www.shiyanlou.com/courses/670"),E=r("<p>\u901A\u8FC7\u8FD9\u4E2A lab\uFF0C\u5927\u5BB6\u53EF\u4EE5\u5B66\u5230\uFF1A</p><ul><li>\u89E3\u6790\u5668</li><li>\u6CE2\u5170\u8868\u8FBE\u5F0F</li><li>\u89E3\u6790\u6811\u7684\u8BA1\u7B97</li><li>S-Expression</li><li>\u53D8\u91CF\u5B9A\u4E49\u548C\u4F7F\u7528</li><li>\u6761\u4EF6\u5224\u65AD</li><li>\u6B63\u5219\u8868\u8FBE\u5F0F</li><li>\u9012\u5F52\u5206\u6790\u957F\u5B57\u7B26\u4E32</li><li>\u51FA\u9519\u5904\u7406</li><li>Q-Expression</li><li>\u51FD\u6570</li><li>\u5B57\u7B26\u4E32</li></ul><p>\u8FD9\u4E2A lab \u7FFB\u8BD1\u81EA\u56FD\u5916\u7684 build your own lisp\uFF1A</p>",3),L={href:"https://buildyourownlisp.com/",target:"_blank",rel:"noopener noreferrer"},U=t("https://buildyourownlisp.com/"),N=r('<p>\u5982\u679C\u82F1\u8BED\u529F\u5E95\u6BD4\u8F83\u624E\u5B9E\u7684\u8BDD\uFF0C\u53EF\u4EE5\u76F4\u63A5\u770B\u539F\u7248\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/c-8.png" alt=""></p><p>\u8BA4\u771F\u8DDF\u7740\u505A\u8FD9\u4E9B lab\uFF0C\u771F\u672C\u9886\u5C31\u5B66\u5230\u624B\u4E86\u3002</p><p><strong>06\uFF09\u5B66\u4E60 C\u8BED\u8A00\u7684\u5176\u4ED6\u8D44\u6E90</strong></p><p>\u7ED9\u521D\u4E2D\u751F\u770B\u7684\u300A\u554A\u54C8 C\u8BED\u8A00\u300B\uFF0C\u7B80\u5355\u6613\u61C2\uFF0C\u751F\u52A8\u6709\u8DA3\uFF0C\u867D\u7136\u53EA\u80FD\u5B66\u5230 C\u8BED\u8A00\u7684\u51B0\u5C71\u4E00\u89D2\uFF0C\u4F46\u4E5F\u503C\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/c-9.png" alt=""></p><p>\u7ED9\u9AD8\u4E2D\u751F\u3001\u5927\u4E00\u65B0\u751F\u770B\u7684\u5165\u95E8\u4E66\u300Ac primer plus\u300B\uFF0C\u8BED\u6CD5\u5168\u8986\u76D6\uFF0C\u7EC6\u8282\u591A\uFF0C\u77E5\u8BC6\u70B9\u8BB2\u7684\u6E05\u695A\uFF0C\u7F3A\u70B9\u662F\u7410\u788E\uFF0C\u7EC6\u8282\u5F2F\u5F2F\u7ED5\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/c-10.png" alt=""></p><p>\u8FD8\u6709\u4E00\u672C\u300AC \u7A0B\u5E8F\u8BBE\u8BA1\u8BED\u8A00\u300B\uFF0C\u8FD9\u672C\u4E66\u7684\u4F5C\u8005\u662F C\u8BED\u8A00\u4E4B\u7236\uFF0C\u6240\u4EE5\u5168\u4E66\u8BB2\u7684\u90FD\u662F C\u8BED\u8A00\u7684\u6838\u5FC3\u3002\u4EE3\u7801\u793A\u4F8B\u5927\u591A\u90FD\u662F\u5E93\u51FD\u6570\u7684\u5B9E\u73B0\u65B9\u6CD5\uFF0C\u5185\u5BB9\u7B80\u6D01\u660E\u4E86\uFF0C\u5E72\u51C0\u5229\u843D\uFF0C\u6CA1\u6709\u5E9F\u8BDD\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/c-11.png" alt=""></p><p>\u7ED9</p><ul><li>\u60F3\u6210\u4E3A\u5927\u4F6C\u7684\u4EBA</li><li>\u60F3\u8FDB\u9636 C\u8BED\u8A00</li><li>\u60F3\u7406\u89E3\u6307\u9488\u548C\u5185\u5B58</li><li>\u60F3\u641E\u61C2 Linux \u5185\u6838</li><li>\u60F3\u641E\u57FA\u7840\u8BBE\u5907\u7684</li><li>\u60F3\u641E\u5355\u7247\u673A\u7684</li><li>\u60F3\u8FDB\u5FAE\u8F6F\u6539\u8FDB Windows \u7684</li><li>\u60F3\u641E\u8D34\u8FD1\u751F\u6D3B\u786C\u4EF6\u7684\uFF0C\u6BD4\u5982\u8BF4\u95F9\u949F\u3001\u8BA1\u65F6\u5668\u3001\u7B80\u5355\u7684\u673A\u5668\u4EBA</li></ul><p>\u770B\u7684\u8FDB\u9636\u4E66\u300AC \u9677\u9631\u4E0E\u7F3A\u9677\u300B\u3001\u300AC \u4E13\u5BB6\u7F16\u7A0B\u300B\u3001\u300AC \u548C\u6307\u9488\u300B</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/c-12.png" alt=""></p><p>\u5C3D\u7BA1\u6211\u4E0D\u63A8\u8350\u5927\u5BB6\u770B\u4E66\u5165\u95E8\uFF0C\u4F46\u6211\u77E5\u9053\u5F88\u591A\u8BFB\u8005\u8FD8\u662F\u559C\u6B22\u901A\u8FC7\u770B\u4E66\u7684\u65B9\u5F0F\u5B66\u4E60\u3002\u76F4\u63A5\u957F\u6309\u626B\u63CF\u4E0B\u65B9\u4E8C\u7EF4\u7801\uFF0C\u5173\u6CE8\u540E\u56DE\u590D \u300C<strong>C</strong>\u300D \u4E0B\u8F7D\u8FD9 PDF \u7248\u5427\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongzhonghao.png" alt="\uFF08\u957F\u6309\u626B\u7801\u8BC6\u522B\uFF09"></p><p>\u66F4\u591A C\u8BED\u8A00\u7684\u5B66\u4E60\u8D44\u6599\uFF0C\u53EF\u4EE5\u76F4\u63A5\u6233\u6211\u6574\u7406\u7684\u8FD9\u4E2A GitHub/\u7801\u4E91\u4ED3\u5E93\u2014\u2014\u{1F4DA}\u7A0B\u5E8F\u5458\u5FC5\u8BFB\u4E66\u5355\u6574\u7406\uFF0C\u9644\u4E0B\u8F7D\u5730\u5740\uFF0C\u91CC\u9762\u6709\u5927\u91CF\u7684 C\u8BED\u8A00\u5B66\u4E60\u8D44\u6599\u3002</p>',17),V=t("GitHub \u5730\u5740\uFF1A"),Z={href:"https://github.com/itwanger/JavaBooks#c",target:"_blank",rel:"noopener noreferrer"},z=t("https://github.com/itwanger/JavaBooks"),F=t("\u7801\u4E91\u5730\u5740\uFF1A"),G={href:"https://gitee.com/itwanger/JavaBooks#c",target:"_blank",rel:"noopener noreferrer"},S=t("https://gitee.com/itwanger/JavaBooks"),W=r('<p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/c-books.jpg" alt=""></p><p>\u7B80\u5355\u7F57\u5217\u4E00\u4E0B\uFF1A</p><ul><li>\u6DF1\u5EA6\u63A2\u7D22C \u5BF9\u8C61\u6A21\u578B</li><li>\u6570\u636E\u7ED3\u6784\u4E0E\u7B97\u6CD5\u5206\u6790--C\u8BED\u8A00\u63CF\u8FF0</li><li>C Primer Plus\uFF08\u7B2C\u4E94\u7248\uFF09</li><li>C\u7A0B\u5E8F\u8BBE\u8BA1\u8BED\u8A00\uFF08\u7B2C\u4E8C\u7248\uFF0C\u4E2D\u6587\u7248\uFF09</li><li>C\u548C\u6307\u9488</li><li>C\u9677\u9631\u4E0E\u7F3A\u9677</li><li>C\u4E13\u5BB6\u7F16\u7A0B</li></ul><hr><p>\u5230\u6B64\u4E3A\u6B62\uFF0CC\u8BED\u8A00\u7684\u91CD\u70B9\u5C31\u5168\u90E8\u5212\u51FA\u6765\u4E86\uFF0C\u5269\u4E0B\u7684\u5B66\u4E60\u5C31\u4EA4\u7ED9\u5927\u5BB6\u4E86\u3002\u6700\u540E\uFF0C\u4E8C\u54E5\u518D\u5520\u53E8\u51E0\u53E5\uFF1A</p><p>1\u3001\u81EA\u5B66\u624D\u662F\u786C\u9053\u7406\u3002\u5F3A\u5927\u7684\u81EA\u5B66\u80FD\u529B\u662F\u72EC\u81EA\u89E3\u51B3\u95EE\u9898\u7684\u6839\u672C\uFF0C\u7A0B\u5E8F\u5458\u9700\u8981\u62E5\u6709\u5F3A\u5927\u7684\u81EA\u5B66\u80FD\u529B\u3002</p><p>2\u3001\u4E00\u4E2A\u4EBA\u53EF\u4EE5\u8D70\u5F97\u5F88\u5FEB\uFF0C\u4F46\u4E00\u7FA4\u4EBA\u624D\u80FD\u8D70\u7684\u66F4\u8FDC\u3002\u6700\u597D\u52A0\u5165\u4E00\u4E9B\u6709\u6C1B\u56F4\u7684\u6280\u672F\u4EA4\u6D41\u7FA4\uFF0C\u7ED3\u4EA4\u4E00\u4E24\u4E2A\u6709\u80FD\u529B\u7684\u540C\u9636\u6BB5\u7684\u4EBA\uFF0C\u5207\u78CB\u7CBE\u8FDB\u4E00\u4E0B\u3002</p><p>3\u3001\u5165\u95E8\u9636\u6BB5\uFF0Ccoding \u4E3A\u4E3B\uFF0C\u89C6\u9891\u4E3A\u8F85\uFF0C\u4E0D\u8981\u641E\u53CD\u4E86\u3002\u8BB0\u4F4F\u8FD9\u4E2A\u516C\u5F0F\uFF1A\u53EA\u770B+\u4E0D\u7EC3=\u5047\u628A\u620F\u3002</p><p>4\u3001\u5982\u679C\u4EE5\u540E\u4E0D\u60F3\u5F53\u4E00\u4E2A\u4F18\u79C0\u7684\u5DE5\u7A0B\u5E08\uFF0C\u4E0D\u60F3\u5728\u8BA1\u7B97\u673A\u8FD9\u6761\u9053\u8DEF\u4E0A\u8D70\u5F97\u66F4\u8FDC\uFF0C\u53EA\u60F3\u8EBA\u5E73\u5F53\u4E2A\u5E73\u5E73\u6DE1\u6DE1\u7684\u7801\u519C\uFF0C\u90A3\u4E48\u6211\u63A8\u8350\u4E00\u6761\u8DEF\uFF1A\u8DDF\u7740\u8001\u5E08\u4E00\u6B65\u6B65\u8D70\uFF0C\u8DDF\u7740\u5927\u5B66\u7684\u6559\u5B66\u65B9\u6848\uFF0C\u4E00\u6B65\u6B65\u8D70\u5C31\u884C\u4E86\u3002</p><p>\u4E0A\u9762\u8FD94\u6761\u5EFA\u8BAE\u5176\u5B9E\u4E0D\u4EC5\u9002\u7528\u4E8EC\u8BED\u8A00\u7684\u5B66\u4E60\uFF0C\u8FD8\u9002\u7528\u4E8E\u5176\u4ED6\u4EFB\u4F55\u4E00\u95E8\u7F16\u7A0B\u8BED\u8A00\u7684\u5B66\u4E60\u3002\u5982\u679C\u80FD\u591F\u8FD9\u6837\u575A\u6301\u4E0B\u53BB\uFF0C\u51E0\u5E74\u540E\uFF0C\u4F60\u5C06\u662F\u4E00\u540D\u5584\u4E8E\u89E3\u51B3\u5B9E\u9645\u95EE\u9898\u7684\u5DE5\u7A0B\u5E08\uFF0C\u800C\u4E0D\u662F\u4E00\u540D\u666E\u666E\u901A\u901A\u7684\u7801\u519C\u3002</p><p>\u4EE5\u4E0A\uFF0C\u5E0C\u671B\u80FD\u5E2E\u52A9\u5230\u5927\u5BB6\uFF01</p><p><em>\u6CA1\u6709\u4EC0\u4E48\u4F7F\u6211\u505C\u7559\u2014\u2014\u9664\u4E86\u76EE\u7684\uFF0C\u7EB5\u7136\u5CB8\u65C1\u6709\u73AB\u7470\u3001\u6709\u7EFF\u836B\u3001\u6709\u5B81\u9759\u7684\u6E2F\u6E7E\uFF0C\u6211\u662F\u4E0D\u7CFB\u4E4B\u821F</em>\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p>',13);function A(H,I){const o=a("ExternalLinkIcon");return n(),p("div",null,[c,e("blockquote",null,[e("p",null,[g,e("a",h,[u,i(o)])])]),b,_,d,e("blockquote",null,[e("p",null,[m,e("a",C,[x,i(o)])])]),v,e("blockquote",null,[e("p",null,[j,e("a",w,[f,i(o)])])]),k,J,B,q,e("blockquote",null,[e("p",null,[y,e("a",P,[D,i(o)])])]),E,e("blockquote",null,[e("p",null,[e("a",L,[U,i(o)])])]),N,e("ul",null,[e("li",null,[V,e("a",Z,[z,i(o)])]),e("li",null,[F,e("a",G,[S,i(o)])])]),W])}var M=l(s,[["render",A],["__file","c.html.vue"]]);export{M as default};
diff --git a/dist/assets/cas.html.ff0123d4.js b/dist/assets/cas.html.68e07dc8.js
similarity index 99%
rename from dist/assets/cas.html.ff0123d4.js
rename to dist/assets/cas.html.68e07dc8.js
index 2c02fd0e..96dc3d15 100644
--- a/dist/assets/cas.html.ff0123d4.js
+++ b/dist/assets/cas.html.68e07dc8.js
@@ -1,4 +1,4 @@
-import{_ as t}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o,c,a as n,b as s,e as l,d as e}from"./app.a0271b9c.js";const i={},d=l(`<h1 id="java\u5B9E\u73B0cas\u7684\u539F\u7406" tabindex="-1"><a class="header-anchor" href="#java\u5B9E\u73B0cas\u7684\u539F\u7406" aria-hidden="true">#</a> Java\u5B9E\u73B0CAS\u7684\u539F\u7406</h1><p>\u5728\u5E76\u53D1\u7F16\u7A0B\u4E2D\u6211\u4EEC\u90FD\u77E5\u9053<code>i++</code>\u64CD\u4F5C\u662F\u975E\u7EBF\u7A0B\u5B89\u5168\u7684\uFF0C\u8FD9\u662F\u56E0\u4E3A <code>i++</code>\u64CD\u4F5C\u4E0D\u662F\u539F\u5B50\u64CD\u4F5C\u3002</p><p>\u5982\u4F55\u4FDD\u8BC1\u539F\u5B50\u6027\u5462\uFF1F\u5E38\u7528\u7684\u65B9\u6CD5\u5C31\u662F<code>\u52A0\u9501</code>\u3002\u5728Java\u8BED\u8A00\u4E2D\u53EF\u4EE5\u4F7F\u7528 <code>synchronized</code>\u548C<code>CAS</code>\u5B9E\u73B0\u52A0\u9501\u6548\u679C\u3002</p><p><code>synchronized</code>\u662F\u60B2\u89C2\u9501\uFF0C\u7EBF\u7A0B\u5F00\u59CB\u6267\u884C\u7B2C\u4E00\u6B65\u5C31\u662F\u83B7\u53D6\u9501\uFF0C\u4E00\u65E6\u83B7\u5F97\u9501\uFF0C\u5176\u4ED6\u7684\u7EBF\u7A0B\u8FDB\u5165\u540E\u5C31\u4F1A\u963B\u585E\u7B49\u5F85\u9501\u3002\u5982\u679C\u4E0D\u597D\u7406\u89E3\uFF0C\u4E3E\u4E2A\u751F\u6D3B\u4E2D\u7684\u4F8B\u5B50\uFF1A\u4E00\u4E2A\u4EBA\u8FDB\u5165\u5395\u6240\u540E\u9996\u5148\u628A\u95E8\u9501\u4E0A\uFF08\u83B7\u53D6\u9501\uFF09\uFF0C\u7136\u540E\u5F00\u59CB\u4E0A\u5395\u6240\uFF0C\u8FD9\u4E2A\u65F6\u5019\u6709\u5176\u4ED6\u4EBA\u6765\u4E86\u53EA\u80FD\u5728\u5916\u9762\u7B49\uFF08\u963B\u585E\uFF09\uFF0C\u5C31\u7B97\u518D\u6025\u4E5F\u6CA1\u7528\u3002\u4E0A\u5B8C\u5395\u6240\u5B8C\u4E8B\u540E\u628A\u95E8\u6253\u5F00\uFF08\u89E3\u9501\uFF09\uFF0C\u5176\u4ED6\u4EBA\u5C31\u53EF\u4EE5\u8FDB\u5165\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/cas-973e8804-c713-43f6-9a63-4b9f2be54f10.png" alt=""></p><p><code>CAS</code>\u662F\u4E50\u89C2\u9501\uFF0C\u7EBF\u7A0B\u6267\u884C\u7684\u65F6\u5019\u4E0D\u4F1A\u52A0\u9501\uFF0C\u5047\u8BBE\u6CA1\u6709\u51B2\u7A81\u53BB\u5B8C\u6210\u67D0\u9879\u64CD\u4F5C\uFF0C\u5982\u679C\u56E0\u4E3A\u51B2\u7A81\u5931\u8D25\u4E86\u5C31\u91CD\u8BD5\uFF0C\u6700\u540E\u76F4\u5230\u6210\u529F\u4E3A\u6B62\u3002</p><h2 id="\u4E50\u89C2\u9501\u4E0E\u60B2\u89C2\u9501\u7684\u6982\u5FF5" tabindex="-1"><a class="header-anchor" href="#\u4E50\u89C2\u9501\u4E0E\u60B2\u89C2\u9501\u7684\u6982\u5FF5" aria-hidden="true">#</a> \u4E50\u89C2\u9501\u4E0E\u60B2\u89C2\u9501\u7684\u6982\u5FF5</h2><p>\u9501\u53EF\u4EE5\u4ECE\u4E0D\u540C\u7684\u89D2\u5EA6\u5206\u7C7B\u3002\u5176\u4E2D\uFF0C\u4E50\u89C2\u9501\u548C\u60B2\u89C2\u9501\u662F\u4E00\u79CD\u5206\u7C7B\u65B9\u5F0F\u3002</p><p><strong>\u60B2\u89C2\u9501\uFF1A</strong></p><p>\u60B2\u89C2\u9501\u5C31\u662F\u6211\u4EEC\u5E38\u8BF4\u7684\u9501\u3002\u5BF9\u4E8E\u60B2\u89C2\u9501\u6765\u8BF4\uFF0C\u5B83\u603B\u662F\u8BA4\u4E3A\u6BCF\u6B21\u8BBF\u95EE\u5171\u4EAB\u8D44\u6E90\u65F6\u4F1A\u53D1\u751F\u51B2\u7A81\uFF0C\u6240\u4EE5\u5FC5\u987B\u5BF9\u6BCF\u6B21\u6570\u636E\u64CD\u4F5C\u52A0\u4E0A\u9501\uFF0C\u4EE5\u4FDD\u8BC1\u4E34\u754C\u533A\u7684\u7A0B\u5E8F\u540C\u4E00\u65F6\u95F4\u53EA\u80FD\u6709\u4E00\u4E2A\u7EBF\u7A0B\u5728\u6267\u884C\u3002</p><p><strong>\u4E50\u89C2\u9501\uFF1A</strong></p><p>\u4E50\u89C2\u9501\u53C8\u79F0\u4E3A\u201C\u65E0\u9501\u201D\uFF0C\u987E\u540D\u601D\u4E49\uFF0C\u5B83\u662F\u4E50\u89C2\u6D3E\u3002\u4E50\u89C2\u9501\u603B\u662F\u5047\u8BBE\u5BF9\u5171\u4EAB\u8D44\u6E90\u7684\u8BBF\u95EE\u6CA1\u6709\u51B2\u7A81\uFF0C\u7EBF\u7A0B\u53EF\u4EE5\u4E0D\u505C\u5730\u6267\u884C\uFF0C\u65E0\u9700\u52A0\u9501\u4E5F\u65E0\u9700\u7B49\u5F85\u3002\u800C\u4E00\u65E6\u591A\u4E2A\u7EBF\u7A0B\u53D1\u751F\u51B2\u7A81\uFF0C\u4E50\u89C2\u9501\u901A\u5E38\u662F\u4F7F\u7528\u4E00\u79CD\u79F0\u4E3ACAS\u7684\u6280\u672F\u6765\u4FDD\u8BC1\u7EBF\u7A0B\u6267\u884C\u7684\u5B89\u5168\u6027\u3002</p><p>\u7531\u4E8E\u65E0\u9501\u64CD\u4F5C\u4E2D\u6CA1\u6709\u9501\u7684\u5B58\u5728\uFF0C\u56E0\u6B64\u4E0D\u53EF\u80FD\u51FA\u73B0\u6B7B\u9501\u7684\u60C5\u51B5\uFF0C\u4E5F\u5C31\u662F\u8BF4<strong>\u4E50\u89C2\u9501\u5929\u751F\u514D\u75AB\u6B7B\u9501</strong>\u3002</p><p>\u4E50\u89C2\u9501\u591A\u7528\u4E8E\u201C\u8BFB\u591A\u5199\u5C11\u201C\u7684\u73AF\u5883\uFF0C\u907F\u514D\u9891\u7E41\u52A0\u9501\u5F71\u54CD\u6027\u80FD\uFF1B\u800C\u60B2\u89C2\u9501\u591A\u7528\u4E8E\u201D\u5199\u591A\u8BFB\u5C11\u201C\u7684\u73AF\u5883\uFF0C\u907F\u514D\u9891\u7E41\u5931\u8D25\u548C\u91CD\u8BD5\u5F71\u54CD\u6027\u80FD\u3002</p><h2 id="cas\u7684\u6982\u5FF5" tabindex="-1"><a class="header-anchor" href="#cas\u7684\u6982\u5FF5" aria-hidden="true">#</a> CAS\u7684\u6982\u5FF5</h2><p>CAS\u7684\u5168\u79F0\u662F\uFF1A\u6BD4\u8F83\u5E76\u4EA4\u6362\uFF08Compare And Swap\uFF09\u3002\u5728CAS\u4E2D\uFF0C\u6709\u8FD9\u6837\u4E09\u4E2A\u503C\uFF1A</p><ul><li>V\uFF1A\u8981\u66F4\u65B0\u7684\u53D8\u91CF(var)</li><li>E\uFF1A\u9884\u671F\u503C(expected)</li><li>N\uFF1A\u65B0\u503C(new)</li></ul><p>\u6BD4\u8F83\u5E76\u4EA4\u6362\u7684\u8FC7\u7A0B\u5982\u4E0B\uFF1A</p><p>\u5224\u65ADV\u662F\u5426\u7B49\u4E8EE\uFF0C\u5982\u679C\u7B49\u4E8E\uFF0C\u5C06V\u7684\u503C\u8BBE\u7F6E\u4E3AN\uFF1B\u5982\u679C\u4E0D\u7B49\uFF0C\u8BF4\u660E\u5DF2\u7ECF\u6709\u5176\u5B83\u7EBF\u7A0B\u66F4\u65B0\u4E86V\uFF0C\u5219\u5F53\u524D\u7EBF\u7A0B\u653E\u5F03\u66F4\u65B0\uFF0C\u4EC0\u4E48\u90FD\u4E0D\u505A\u3002</p><p>\u6240\u4EE5\u8FD9\u91CC\u7684<strong>\u9884\u671F\u503CE\u672C\u8D28\u4E0A\u6307\u7684\u662F\u201C\u65E7\u503C\u201D</strong>\u3002</p><p>\u6211\u4EEC\u4EE5\u4E00\u4E2A\u7B80\u5355\u7684\u4F8B\u5B50\u6765\u89E3\u91CA\u8FD9\u4E2A\u8FC7\u7A0B\uFF1A</p><ol><li>\u5982\u679C\u6709\u4E00\u4E2A\u591A\u4E2A\u7EBF\u7A0B\u5171\u4EAB\u7684\u53D8\u91CF<code>i</code>\u539F\u672C\u7B49\u4E8E5\uFF0C\u6211\u73B0\u5728\u5728\u7EBF\u7A0BA\u4E2D\uFF0C\u60F3\u628A\u5B83\u8BBE\u7F6E\u4E3A\u65B0\u7684\u503C6;</li><li>\u6211\u4EEC\u4F7F\u7528CAS\u6765\u505A\u8FD9\u4E2A\u4E8B\u60C5\uFF1B</li><li>\u9996\u5148\u6211\u4EEC\u7528i\u53BB\u4E0E5\u5BF9\u6BD4\uFF0C\u53D1\u73B0\u5B83\u7B49\u4E8E5\uFF0C\u8BF4\u660E\u6CA1\u6709\u88AB\u5176\u5B83\u7EBF\u7A0B\u6539\u8FC7\uFF0C\u90A3\u6211\u5C31\u628A\u5B83\u8BBE\u7F6E\u4E3A\u65B0\u7684\u503C6\uFF0C\u6B64\u6B21CAS\u6210\u529F\uFF0C<code>i</code>\u7684\u503C\u88AB\u8BBE\u7F6E\u6210\u4E866\uFF1B</li><li>\u5982\u679C\u4E0D\u7B49\u4E8E5\uFF0C\u8BF4\u660E<code>i</code>\u88AB\u5176\u5B83\u7EBF\u7A0B\u6539\u8FC7\u4E86\uFF08\u6BD4\u5982\u73B0\u5728<code>i</code>\u7684\u503C\u4E3A2\uFF09\uFF0C\u90A3\u4E48\u6211\u5C31\u4EC0\u4E48\u4E5F\u4E0D\u505A\uFF0C\u6B64\u6B21CAS\u5931\u8D25\uFF0C<code>i</code>\u7684\u503C\u4ECD\u7136\u4E3A2\u3002</li></ol><p>\u5728\u8FD9\u4E2A\u4F8B\u5B50\u4E2D\uFF0C<code>i</code>\u5C31\u662FV\uFF0C5\u5C31\u662FE\uFF0C6\u5C31\u662FN\u3002</p><p>\u90A3\u6709\u6CA1\u6709\u53EF\u80FD\u6211\u5728\u5224\u65AD\u4E86<code>i</code>\u4E3A5\u4E4B\u540E\uFF0C\u6B63\u51C6\u5907\u66F4\u65B0\u5B83\u7684\u65B0\u503C\u7684\u65F6\u5019\uFF0C\u88AB\u5176\u5B83\u7EBF\u7A0B\u66F4\u6539\u4E86<code>i</code>\u7684\u503C\u5462\uFF1F</p><p>\u4E0D\u4F1A\u7684\u3002\u56E0\u4E3ACAS\u662F\u4E00\u79CD\u539F\u5B50\u64CD\u4F5C\uFF0C\u5B83\u662F\u4E00\u79CD\u7CFB\u7EDF\u539F\u8BED\uFF0C\u662F\u4E00\u6761CPU\u7684\u539F\u5B50\u6307\u4EE4\uFF0C\u4ECECPU\u5C42\u9762\u4FDD\u8BC1\u5B83\u7684\u539F\u5B50\u6027</p><p><strong>\u5F53\u591A\u4E2A\u7EBF\u7A0B\u540C\u65F6\u4F7F\u7528CAS\u64CD\u4F5C\u4E00\u4E2A\u53D8\u91CF\u65F6\uFF0C\u53EA\u6709\u4E00\u4E2A\u4F1A\u80DC\u51FA\uFF0C\u5E76\u6210\u529F\u66F4\u65B0\uFF0C\u5176\u4F59\u5747\u4F1A\u5931\u8D25\uFF0C\u4F46\u5931\u8D25\u7684\u7EBF\u7A0B\u5E76\u4E0D\u4F1A\u88AB\u6302\u8D77\uFF0C\u4EC5\u662F\u88AB\u544A\u77E5\u5931\u8D25\uFF0C\u5E76\u4E14\u5141\u8BB8\u518D\u6B21\u5C1D\u8BD5\uFF0C\u5F53\u7136\u4E5F\u5141\u8BB8\u5931\u8D25\u7684\u7EBF\u7A0B\u653E\u5F03\u64CD\u4F5C\u3002</strong></p><h2 id="java\u5B9E\u73B0cas\u7684\u539F\u7406-unsafe\u7C7B" tabindex="-1"><a class="header-anchor" href="#java\u5B9E\u73B0cas\u7684\u539F\u7406-unsafe\u7C7B" aria-hidden="true">#</a> Java\u5B9E\u73B0CAS\u7684\u539F\u7406 - Unsafe\u7C7B</h2><p>\u524D\u9762\u63D0\u5230\uFF0CCAS\u662F\u4E00\u79CD\u539F\u5B50\u64CD\u4F5C\u3002\u90A3\u4E48Java\u662F\u600E\u6837\u6765\u4F7F\u7528CAS\u7684\u5462\uFF1F\u6211\u4EEC\u77E5\u9053\uFF0C\u5728Java\u4E2D\uFF0C\u5982\u679C\u4E00\u4E2A\u65B9\u6CD5\u662Fnative\u7684\uFF0C\u90A3Java\u5C31\u4E0D\u8D1F\u8D23\u5177\u4F53\u5B9E\u73B0\u5B83\uFF0C\u800C\u662F\u4EA4\u7ED9\u5E95\u5C42\u7684JVM\u4F7F\u7528c\u6216\u8005c++\u53BB\u5B9E\u73B0\u3002</p><p>\u5728Java\u4E2D\uFF0C\u6709\u4E00\u4E2A<code>Unsafe</code>\u7C7B\uFF0C\u5B83\u5728<code>sun.misc</code>\u5305\u4E2D\u3002\u5B83\u91CC\u9762\u662F\u4E00\u4E9B<code>native</code>\u65B9\u6CD5\uFF0C\u5176\u4E2D\u5C31\u6709\u51E0\u4E2A\u5173\u4E8ECAS\u7684\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">boolean</span> <span class="token function">compareAndSwapObject</span><span class="token punctuation">(</span><span class="token class-name">Object</span> o<span class="token punctuation">,</span> <span class="token keyword">long</span> offset<span class="token punctuation">,</span><span class="token class-name">Object</span> expected<span class="token punctuation">,</span> <span class="token class-name">Object</span> x<span class="token punctuation">)</span><span class="token punctuation">;</span>
+import{_ as t}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o,c,a as n,b as s,e as l,d as e}from"./app.615e41d8.js";const i={},d=l(`<h1 id="java\u5B9E\u73B0cas\u7684\u539F\u7406" tabindex="-1"><a class="header-anchor" href="#java\u5B9E\u73B0cas\u7684\u539F\u7406" aria-hidden="true">#</a> Java\u5B9E\u73B0CAS\u7684\u539F\u7406</h1><p>\u5728\u5E76\u53D1\u7F16\u7A0B\u4E2D\u6211\u4EEC\u90FD\u77E5\u9053<code>i++</code>\u64CD\u4F5C\u662F\u975E\u7EBF\u7A0B\u5B89\u5168\u7684\uFF0C\u8FD9\u662F\u56E0\u4E3A <code>i++</code>\u64CD\u4F5C\u4E0D\u662F\u539F\u5B50\u64CD\u4F5C\u3002</p><p>\u5982\u4F55\u4FDD\u8BC1\u539F\u5B50\u6027\u5462\uFF1F\u5E38\u7528\u7684\u65B9\u6CD5\u5C31\u662F<code>\u52A0\u9501</code>\u3002\u5728Java\u8BED\u8A00\u4E2D\u53EF\u4EE5\u4F7F\u7528 <code>synchronized</code>\u548C<code>CAS</code>\u5B9E\u73B0\u52A0\u9501\u6548\u679C\u3002</p><p><code>synchronized</code>\u662F\u60B2\u89C2\u9501\uFF0C\u7EBF\u7A0B\u5F00\u59CB\u6267\u884C\u7B2C\u4E00\u6B65\u5C31\u662F\u83B7\u53D6\u9501\uFF0C\u4E00\u65E6\u83B7\u5F97\u9501\uFF0C\u5176\u4ED6\u7684\u7EBF\u7A0B\u8FDB\u5165\u540E\u5C31\u4F1A\u963B\u585E\u7B49\u5F85\u9501\u3002\u5982\u679C\u4E0D\u597D\u7406\u89E3\uFF0C\u4E3E\u4E2A\u751F\u6D3B\u4E2D\u7684\u4F8B\u5B50\uFF1A\u4E00\u4E2A\u4EBA\u8FDB\u5165\u5395\u6240\u540E\u9996\u5148\u628A\u95E8\u9501\u4E0A\uFF08\u83B7\u53D6\u9501\uFF09\uFF0C\u7136\u540E\u5F00\u59CB\u4E0A\u5395\u6240\uFF0C\u8FD9\u4E2A\u65F6\u5019\u6709\u5176\u4ED6\u4EBA\u6765\u4E86\u53EA\u80FD\u5728\u5916\u9762\u7B49\uFF08\u963B\u585E\uFF09\uFF0C\u5C31\u7B97\u518D\u6025\u4E5F\u6CA1\u7528\u3002\u4E0A\u5B8C\u5395\u6240\u5B8C\u4E8B\u540E\u628A\u95E8\u6253\u5F00\uFF08\u89E3\u9501\uFF09\uFF0C\u5176\u4ED6\u4EBA\u5C31\u53EF\u4EE5\u8FDB\u5165\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/cas-973e8804-c713-43f6-9a63-4b9f2be54f10.png" alt=""></p><p><code>CAS</code>\u662F\u4E50\u89C2\u9501\uFF0C\u7EBF\u7A0B\u6267\u884C\u7684\u65F6\u5019\u4E0D\u4F1A\u52A0\u9501\uFF0C\u5047\u8BBE\u6CA1\u6709\u51B2\u7A81\u53BB\u5B8C\u6210\u67D0\u9879\u64CD\u4F5C\uFF0C\u5982\u679C\u56E0\u4E3A\u51B2\u7A81\u5931\u8D25\u4E86\u5C31\u91CD\u8BD5\uFF0C\u6700\u540E\u76F4\u5230\u6210\u529F\u4E3A\u6B62\u3002</p><h2 id="\u4E50\u89C2\u9501\u4E0E\u60B2\u89C2\u9501\u7684\u6982\u5FF5" tabindex="-1"><a class="header-anchor" href="#\u4E50\u89C2\u9501\u4E0E\u60B2\u89C2\u9501\u7684\u6982\u5FF5" aria-hidden="true">#</a> \u4E50\u89C2\u9501\u4E0E\u60B2\u89C2\u9501\u7684\u6982\u5FF5</h2><p>\u9501\u53EF\u4EE5\u4ECE\u4E0D\u540C\u7684\u89D2\u5EA6\u5206\u7C7B\u3002\u5176\u4E2D\uFF0C\u4E50\u89C2\u9501\u548C\u60B2\u89C2\u9501\u662F\u4E00\u79CD\u5206\u7C7B\u65B9\u5F0F\u3002</p><p><strong>\u60B2\u89C2\u9501\uFF1A</strong></p><p>\u60B2\u89C2\u9501\u5C31\u662F\u6211\u4EEC\u5E38\u8BF4\u7684\u9501\u3002\u5BF9\u4E8E\u60B2\u89C2\u9501\u6765\u8BF4\uFF0C\u5B83\u603B\u662F\u8BA4\u4E3A\u6BCF\u6B21\u8BBF\u95EE\u5171\u4EAB\u8D44\u6E90\u65F6\u4F1A\u53D1\u751F\u51B2\u7A81\uFF0C\u6240\u4EE5\u5FC5\u987B\u5BF9\u6BCF\u6B21\u6570\u636E\u64CD\u4F5C\u52A0\u4E0A\u9501\uFF0C\u4EE5\u4FDD\u8BC1\u4E34\u754C\u533A\u7684\u7A0B\u5E8F\u540C\u4E00\u65F6\u95F4\u53EA\u80FD\u6709\u4E00\u4E2A\u7EBF\u7A0B\u5728\u6267\u884C\u3002</p><p><strong>\u4E50\u89C2\u9501\uFF1A</strong></p><p>\u4E50\u89C2\u9501\u53C8\u79F0\u4E3A\u201C\u65E0\u9501\u201D\uFF0C\u987E\u540D\u601D\u4E49\uFF0C\u5B83\u662F\u4E50\u89C2\u6D3E\u3002\u4E50\u89C2\u9501\u603B\u662F\u5047\u8BBE\u5BF9\u5171\u4EAB\u8D44\u6E90\u7684\u8BBF\u95EE\u6CA1\u6709\u51B2\u7A81\uFF0C\u7EBF\u7A0B\u53EF\u4EE5\u4E0D\u505C\u5730\u6267\u884C\uFF0C\u65E0\u9700\u52A0\u9501\u4E5F\u65E0\u9700\u7B49\u5F85\u3002\u800C\u4E00\u65E6\u591A\u4E2A\u7EBF\u7A0B\u53D1\u751F\u51B2\u7A81\uFF0C\u4E50\u89C2\u9501\u901A\u5E38\u662F\u4F7F\u7528\u4E00\u79CD\u79F0\u4E3ACAS\u7684\u6280\u672F\u6765\u4FDD\u8BC1\u7EBF\u7A0B\u6267\u884C\u7684\u5B89\u5168\u6027\u3002</p><p>\u7531\u4E8E\u65E0\u9501\u64CD\u4F5C\u4E2D\u6CA1\u6709\u9501\u7684\u5B58\u5728\uFF0C\u56E0\u6B64\u4E0D\u53EF\u80FD\u51FA\u73B0\u6B7B\u9501\u7684\u60C5\u51B5\uFF0C\u4E5F\u5C31\u662F\u8BF4<strong>\u4E50\u89C2\u9501\u5929\u751F\u514D\u75AB\u6B7B\u9501</strong>\u3002</p><p>\u4E50\u89C2\u9501\u591A\u7528\u4E8E\u201C\u8BFB\u591A\u5199\u5C11\u201C\u7684\u73AF\u5883\uFF0C\u907F\u514D\u9891\u7E41\u52A0\u9501\u5F71\u54CD\u6027\u80FD\uFF1B\u800C\u60B2\u89C2\u9501\u591A\u7528\u4E8E\u201D\u5199\u591A\u8BFB\u5C11\u201C\u7684\u73AF\u5883\uFF0C\u907F\u514D\u9891\u7E41\u5931\u8D25\u548C\u91CD\u8BD5\u5F71\u54CD\u6027\u80FD\u3002</p><h2 id="cas\u7684\u6982\u5FF5" tabindex="-1"><a class="header-anchor" href="#cas\u7684\u6982\u5FF5" aria-hidden="true">#</a> CAS\u7684\u6982\u5FF5</h2><p>CAS\u7684\u5168\u79F0\u662F\uFF1A\u6BD4\u8F83\u5E76\u4EA4\u6362\uFF08Compare And Swap\uFF09\u3002\u5728CAS\u4E2D\uFF0C\u6709\u8FD9\u6837\u4E09\u4E2A\u503C\uFF1A</p><ul><li>V\uFF1A\u8981\u66F4\u65B0\u7684\u53D8\u91CF(var)</li><li>E\uFF1A\u9884\u671F\u503C(expected)</li><li>N\uFF1A\u65B0\u503C(new)</li></ul><p>\u6BD4\u8F83\u5E76\u4EA4\u6362\u7684\u8FC7\u7A0B\u5982\u4E0B\uFF1A</p><p>\u5224\u65ADV\u662F\u5426\u7B49\u4E8EE\uFF0C\u5982\u679C\u7B49\u4E8E\uFF0C\u5C06V\u7684\u503C\u8BBE\u7F6E\u4E3AN\uFF1B\u5982\u679C\u4E0D\u7B49\uFF0C\u8BF4\u660E\u5DF2\u7ECF\u6709\u5176\u5B83\u7EBF\u7A0B\u66F4\u65B0\u4E86V\uFF0C\u5219\u5F53\u524D\u7EBF\u7A0B\u653E\u5F03\u66F4\u65B0\uFF0C\u4EC0\u4E48\u90FD\u4E0D\u505A\u3002</p><p>\u6240\u4EE5\u8FD9\u91CC\u7684<strong>\u9884\u671F\u503CE\u672C\u8D28\u4E0A\u6307\u7684\u662F\u201C\u65E7\u503C\u201D</strong>\u3002</p><p>\u6211\u4EEC\u4EE5\u4E00\u4E2A\u7B80\u5355\u7684\u4F8B\u5B50\u6765\u89E3\u91CA\u8FD9\u4E2A\u8FC7\u7A0B\uFF1A</p><ol><li>\u5982\u679C\u6709\u4E00\u4E2A\u591A\u4E2A\u7EBF\u7A0B\u5171\u4EAB\u7684\u53D8\u91CF<code>i</code>\u539F\u672C\u7B49\u4E8E5\uFF0C\u6211\u73B0\u5728\u5728\u7EBF\u7A0BA\u4E2D\uFF0C\u60F3\u628A\u5B83\u8BBE\u7F6E\u4E3A\u65B0\u7684\u503C6;</li><li>\u6211\u4EEC\u4F7F\u7528CAS\u6765\u505A\u8FD9\u4E2A\u4E8B\u60C5\uFF1B</li><li>\u9996\u5148\u6211\u4EEC\u7528i\u53BB\u4E0E5\u5BF9\u6BD4\uFF0C\u53D1\u73B0\u5B83\u7B49\u4E8E5\uFF0C\u8BF4\u660E\u6CA1\u6709\u88AB\u5176\u5B83\u7EBF\u7A0B\u6539\u8FC7\uFF0C\u90A3\u6211\u5C31\u628A\u5B83\u8BBE\u7F6E\u4E3A\u65B0\u7684\u503C6\uFF0C\u6B64\u6B21CAS\u6210\u529F\uFF0C<code>i</code>\u7684\u503C\u88AB\u8BBE\u7F6E\u6210\u4E866\uFF1B</li><li>\u5982\u679C\u4E0D\u7B49\u4E8E5\uFF0C\u8BF4\u660E<code>i</code>\u88AB\u5176\u5B83\u7EBF\u7A0B\u6539\u8FC7\u4E86\uFF08\u6BD4\u5982\u73B0\u5728<code>i</code>\u7684\u503C\u4E3A2\uFF09\uFF0C\u90A3\u4E48\u6211\u5C31\u4EC0\u4E48\u4E5F\u4E0D\u505A\uFF0C\u6B64\u6B21CAS\u5931\u8D25\uFF0C<code>i</code>\u7684\u503C\u4ECD\u7136\u4E3A2\u3002</li></ol><p>\u5728\u8FD9\u4E2A\u4F8B\u5B50\u4E2D\uFF0C<code>i</code>\u5C31\u662FV\uFF0C5\u5C31\u662FE\uFF0C6\u5C31\u662FN\u3002</p><p>\u90A3\u6709\u6CA1\u6709\u53EF\u80FD\u6211\u5728\u5224\u65AD\u4E86<code>i</code>\u4E3A5\u4E4B\u540E\uFF0C\u6B63\u51C6\u5907\u66F4\u65B0\u5B83\u7684\u65B0\u503C\u7684\u65F6\u5019\uFF0C\u88AB\u5176\u5B83\u7EBF\u7A0B\u66F4\u6539\u4E86<code>i</code>\u7684\u503C\u5462\uFF1F</p><p>\u4E0D\u4F1A\u7684\u3002\u56E0\u4E3ACAS\u662F\u4E00\u79CD\u539F\u5B50\u64CD\u4F5C\uFF0C\u5B83\u662F\u4E00\u79CD\u7CFB\u7EDF\u539F\u8BED\uFF0C\u662F\u4E00\u6761CPU\u7684\u539F\u5B50\u6307\u4EE4\uFF0C\u4ECECPU\u5C42\u9762\u4FDD\u8BC1\u5B83\u7684\u539F\u5B50\u6027</p><p><strong>\u5F53\u591A\u4E2A\u7EBF\u7A0B\u540C\u65F6\u4F7F\u7528CAS\u64CD\u4F5C\u4E00\u4E2A\u53D8\u91CF\u65F6\uFF0C\u53EA\u6709\u4E00\u4E2A\u4F1A\u80DC\u51FA\uFF0C\u5E76\u6210\u529F\u66F4\u65B0\uFF0C\u5176\u4F59\u5747\u4F1A\u5931\u8D25\uFF0C\u4F46\u5931\u8D25\u7684\u7EBF\u7A0B\u5E76\u4E0D\u4F1A\u88AB\u6302\u8D77\uFF0C\u4EC5\u662F\u88AB\u544A\u77E5\u5931\u8D25\uFF0C\u5E76\u4E14\u5141\u8BB8\u518D\u6B21\u5C1D\u8BD5\uFF0C\u5F53\u7136\u4E5F\u5141\u8BB8\u5931\u8D25\u7684\u7EBF\u7A0B\u653E\u5F03\u64CD\u4F5C\u3002</strong></p><h2 id="java\u5B9E\u73B0cas\u7684\u539F\u7406-unsafe\u7C7B" tabindex="-1"><a class="header-anchor" href="#java\u5B9E\u73B0cas\u7684\u539F\u7406-unsafe\u7C7B" aria-hidden="true">#</a> Java\u5B9E\u73B0CAS\u7684\u539F\u7406 - Unsafe\u7C7B</h2><p>\u524D\u9762\u63D0\u5230\uFF0CCAS\u662F\u4E00\u79CD\u539F\u5B50\u64CD\u4F5C\u3002\u90A3\u4E48Java\u662F\u600E\u6837\u6765\u4F7F\u7528CAS\u7684\u5462\uFF1F\u6211\u4EEC\u77E5\u9053\uFF0C\u5728Java\u4E2D\uFF0C\u5982\u679C\u4E00\u4E2A\u65B9\u6CD5\u662Fnative\u7684\uFF0C\u90A3Java\u5C31\u4E0D\u8D1F\u8D23\u5177\u4F53\u5B9E\u73B0\u5B83\uFF0C\u800C\u662F\u4EA4\u7ED9\u5E95\u5C42\u7684JVM\u4F7F\u7528c\u6216\u8005c++\u53BB\u5B9E\u73B0\u3002</p><p>\u5728Java\u4E2D\uFF0C\u6709\u4E00\u4E2A<code>Unsafe</code>\u7C7B\uFF0C\u5B83\u5728<code>sun.misc</code>\u5305\u4E2D\u3002\u5B83\u91CC\u9762\u662F\u4E00\u4E9B<code>native</code>\u65B9\u6CD5\uFF0C\u5176\u4E2D\u5C31\u6709\u51E0\u4E2A\u5173\u4E8ECAS\u7684\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">boolean</span> <span class="token function">compareAndSwapObject</span><span class="token punctuation">(</span><span class="token class-name">Object</span> o<span class="token punctuation">,</span> <span class="token keyword">long</span> offset<span class="token punctuation">,</span><span class="token class-name">Object</span> expected<span class="token punctuation">,</span> <span class="token class-name">Object</span> x<span class="token punctuation">)</span><span class="token punctuation">;</span>
 <span class="token keyword">boolean</span> <span class="token function">compareAndSwapInt</span><span class="token punctuation">(</span><span class="token class-name">Object</span> o<span class="token punctuation">,</span> <span class="token keyword">long</span> offset<span class="token punctuation">,</span><span class="token keyword">int</span> expected<span class="token punctuation">,</span><span class="token keyword">int</span> x<span class="token punctuation">)</span><span class="token punctuation">;</span>
 <span class="token keyword">boolean</span> <span class="token function">compareAndSwapLong</span><span class="token punctuation">(</span><span class="token class-name">Object</span> o<span class="token punctuation">,</span> <span class="token keyword">long</span> offset<span class="token punctuation">,</span><span class="token keyword">long</span> expected<span class="token punctuation">,</span><span class="token keyword">long</span> x<span class="token punctuation">)</span><span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>\u5F53\u7136\uFF0C\u4ED6\u4EEC\u90FD\u662F<code>public native</code>\u7684\u3002</p><p>Unsafe\u4E2D\u5BF9CAS\u7684\u5B9E\u73B0\u662FC++\u5199\u7684\uFF0C\u5B83\u7684\u5177\u4F53\u5B9E\u73B0\u548C\u64CD\u4F5C\u7CFB\u7EDF\u3001CPU\u90FD\u6709\u5173\u7CFB\u3002</p><p>Linux\u7684X86\u4E0B\u4E3B\u8981\u662F\u901A\u8FC7<code>cmpxchgl</code>\u8FD9\u4E2A\u6307\u4EE4\u5728CPU\u7EA7\u5B8C\u6210CAS\u64CD\u4F5C\u7684\uFF0C\u4F46\u5728\u591A\u5904\u7406\u5668\u60C5\u51B5\u4E0B\u5FC5\u987B\u4F7F\u7528<code>lock</code>\u6307\u4EE4\u52A0\u9501\u6765\u5B8C\u6210\u3002\u5F53\u7136\u4E0D\u540C\u7684\u64CD\u4F5C\u7CFB\u7EDF\u548C\u5904\u7406\u5668\u7684\u5B9E\u73B0\u4F1A\u6709\u6240\u4E0D\u540C\uFF0C\u5927\u5BB6\u53EF\u4EE5\u81EA\u884C\u4E86\u89E3\u3002</p><p>\u5F53\u7136\uFF0CUnsafe\u7C7B\u91CC\u9762\u8FD8\u6709\u5176\u5B83\u65B9\u6CD5\u7528\u4E8E\u4E0D\u540C\u7684\u7528\u9014\u3002\u6BD4\u5982\u652F\u6301\u7EBF\u7A0B\u6302\u8D77\u548C\u6062\u590D\u7684<code>park</code>\u548C<code>unpark</code>\uFF0C LockSupport\u7C7B\u5E95\u5C42\u5C31\u662F\u8C03\u7528\u4E86\u8FD9\u4E24\u4E2A\u65B9\u6CD5\u3002\u8FD8\u6709\u652F\u6301\u53CD\u5C04\u64CD\u4F5C\u7684<code>allocateInstance()</code>\u65B9\u6CD5\u3002</p><h2 id="\u539F\u5B50\u64CD\u4F5C-atomicinteger\u7C7B\u6E90\u7801\u7B80\u6790" tabindex="-1"><a class="header-anchor" href="#\u539F\u5B50\u64CD\u4F5C-atomicinteger\u7C7B\u6E90\u7801\u7B80\u6790" aria-hidden="true">#</a> \u539F\u5B50\u64CD\u4F5C-AtomicInteger\u7C7B\u6E90\u7801\u7B80\u6790</h2><p>\u4E0A\u9762\u4ECB\u7ECD\u4E86Unsafe\u7C7B\u7684\u51E0\u4E2A\u652F\u6301CAS\u7684\u65B9\u6CD5\u3002\u90A3Java\u5177\u4F53\u662F\u5982\u4F55\u4F7F\u7528\u8FD9\u51E0\u4E2A\u65B9\u6CD5\u6765\u5B9E\u73B0\u539F\u5B50\u64CD\u4F5C\u7684\u5462\uFF1F</p><p>JDK\u63D0\u4F9B\u4E86\u4E00\u4E9B\u7528\u4E8E\u539F\u5B50\u64CD\u4F5C\u7684\u7C7B\uFF0C\u5728<code>java.util.concurrent.atomic</code>\u5305\u4E0B\u9762\u3002\u5728JDK 11\u4E2D\uFF0C\u6709\u5982\u4E0B17\u4E2A\u7C7B\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/cas-f6a2281a-d322-4022-8c07-162ccc9dcede.jpg" alt="\u539F\u5B50\u7C7B"></p><p>\u4ECE\u540D\u5B57\u5C31\u53EF\u4EE5\u770B\u5F97\u51FA\u6765\u8FD9\u4E9B\u7C7B\u5927\u6982\u7684\u7528\u9014\uFF1A</p><ul><li>\u539F\u5B50\u66F4\u65B0\u57FA\u672C\u7C7B\u578B</li><li>\u539F\u5B50\u66F4\u65B0\u6570\u7EC4</li><li>\u539F\u5B50\u66F4\u65B0\u5F15\u7528</li><li>\u539F\u5B50\u66F4\u65B0\u5B57\u6BB5\uFF08\u5C5E\u6027\uFF09</li></ul><p>\u8FD9\u91CC\u6211\u4EEC\u4EE5<code>AtomicInteger</code>\u7C7B\u7684<code>getAndAdd(int delta)</code>\u65B9\u6CD5\u4E3A\u4F8B\uFF0C\u6765\u770B\u770BJava\u662F\u5982\u4F55\u5B9E\u73B0\u539F\u5B50\u64CD\u4F5C\u7684\u3002</p><p>\u5148\u770B\u770B\u8FD9\u4E2A\u65B9\u6CD5\u7684\u6E90\u7801\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">final</span> <span class="token keyword">int</span> <span class="token function">getAndAdd</span><span class="token punctuation">(</span><span class="token keyword">int</span> delta<span class="token punctuation">)</span> <span class="token punctuation">{</span>
diff --git a/dist/assets/ccc.html.0a777341.js b/dist/assets/ccc.html.bf391d30.js
similarity index 98%
rename from dist/assets/ccc.html.0a777341.js
rename to dist/assets/ccc.html.bf391d30.js
index 079a3f66..4e7bd523 100644
--- a/dist/assets/ccc.html.0a777341.js
+++ b/dist/assets/ccc.html.bf391d30.js
@@ -1 +1 @@
-import{_ as c}from"./plugin-vue_export-helper.21dcd24c.js";import{r as o,o as l,c as n,a as e,b as i,e as r,d as t}from"./app.a0271b9c.js";const p={},s=r('<h1 id="c-\u5B66\u4E60\u8DEF\u7EBF-\u5EFA\u8BAE\u6536\u85CF" tabindex="-1"><a class="header-anchor" href="#c-\u5B66\u4E60\u8DEF\u7EBF-\u5EFA\u8BAE\u6536\u85CF" aria-hidden="true">#</a> C++\u5B66\u4E60\u8DEF\u7EBF\uFF08\u5EFA\u8BAE\u6536\u85CF\u{1F44D}\uFF09</h1><p>\u5B66\u4E60 C++ \u8BED\u6CD5\uFF0C\u9996\u63A8\u300AC++ Primer \u7B2C\u4E94\u7248\u300B\u3002\u6211\u5728\u53C2\u52A0\u7B2C\u4E00\u4EFD\u5DE5\u4F5C\u7684\u65F6\u5019\uFF0C\u5C31\u4E70\u8FC7\u4E00\u672C\u300AC++ Primer \u7B2C\u56DB\u7248\u300B\uFF0C\u8FD9\u672C\u4E66\u4E00\u76F4\u4E0D\u820D\u5F97\u6254\uFF0C\u5C3D\u7BA1\u5B83\u5DF2\u7ECF\u975E\u5E38\u7834\u4E86\uFF0C\u4F46\u6211\u4EEC\u4E4B\u95F4\u7684\u611F\u60C5\u662F\u6DF1\u539A\u7684\uFF0C\u6BD5\u7ADF\u8DDF\u968F\u6211\u8F97\u8F6C\u4E86\u597D\u51E0\u4E2A\u57CE\u5E02\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/ccc-primer-book.png" alt=""></p><p><em>\u662F\u4E0D\u662F\u4E00\u4E0B\u5B50\u5C31\u66B4\u9732\u81EA\u5DF1\u5DE5\u4F5C\u5E74\u9650\u4E86</em>\uFF1F</p><p>\u8FD9\u672C\u4E66\u975E\u5E38\u5168\u9762\u5730\u8BB2\u89E3\u4E86 C++ \u7684\u8BED\u6CD5\u4EE5\u53CA C++ \u7684\u5404\u79CD\u7279\u6027\uFF0C\u5982\u679C\u80FD\u575A\u6301\u770B\u5B8C\u7684\u8BDD\uFF0C\u5E2E\u52A9\u4F1A\u5F88\u5927\u3002\u5982\u679C\u65F6\u95F4\u6BD4\u8F83\u5145\u5206\u7684\u8BDD\uFF0C\u5EFA\u8BAE\u81F3\u5C11\u770B\u4E24\u904D\u3002\u5982\u679C\u65F6\u95F4\u6BD4\u8F83\u7D27\u5F20\u7684\u8BDD\uFF0C\u81F3\u5C11\u901A\u8BFB\u4E00\u904D\u5427\uFF0C\u8981\u80FD\u628A\u63E1\u4F4F\u8FD9\u672C\u4E66\u7684\u5927\u4F53\u6846\u67B6\uFF0C\u7136\u540E\u7ED3\u5408\u4E2A\u4EBA\u7684\u5B9E\u9645\u60C5\u51B5\u9009\u62E9\u6027\u5730\u770B\u4E00\u4E9B\u91CD\u70B9\u7AE0\u8282\u3002</p><p>\u7136\u540E\u662F\u300AEffective C++\u300B\uFF0C\u4FAF\u6377\u8001\u5E08\u8BD1\u7684\uFF0C\u8FD9\u672C\u4E66\u4E3B\u8981\u8BB2\u89E3\u4E86\u7F16\u5199 C++ \u4EE3\u7801\u9700\u8981\u6CE8\u610F\u7684\u4E00\u4E9B\u6761\u6B3E\uFF0C\u548C\u300AEffective Java\u300B \u5C5E\u4E8E\u540C\u4E00\u4E2A\u7CFB\u5217\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/ccc-2.jpg" alt=""></p><p>\u7B2C\u4E09\u672C\u662F\u300ASTL\u6E90\u7801\u5256\u6790\u300B\u8FD9\u672C\u4E66\uFF0C\u4FAF\u6377\u8001\u5E08\u5199\u7684\uFF0C\u8FD9\u672C\u4E66\u8BB2\u4E86C++\u7684\u5E95\u5C42\u5B9E\u73B0\uFF0C\u5305\u62EC\u5404\u79CD\u5BB9\u5668\uFF08vector\u3001list\u3001heap\u3001deque\u3001Red Black tree\u3001hash table\u3001set/map\uFF09\u7684\u5B9E\u73B0\u3001\u5404\u79CD\u5E38\u89C1\u7B97\u6CD5\uFF08\u6392\u5E8F\u3001\u67E5\u627E\u3001\u6392\u5217\u7EC4\u5408\u3001\u6570\u636E\u79FB\u52A8\u4E0E\u590D\u5236\u6280\u672F\uFF09\u7684\u5B9E\u73B0\u7B49\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/ccc-3.png" alt=""></p><p>\u7B2C\u56DB\u672C\u300A\u6DF1\u5EA6\u63A2\u7D22C++\u5BF9\u8C61\u6A21\u578B\u300B\uFF0C\u4FAF\u6377\u8001\u5E08\u8BD1\u7684\uFF0C\u8FD9\u672C\u4E66\u8BB2\u89E3\u4E86 C++ \u9762\u5411\u5BF9\u8C61\u7279\u6027\u7684\u5E95\u5C42\u5B9E\u73B0\u673A\u5236\uFF0C\u8BFB\u8D77\u6765\u867D\u7136\u6709\u70B9\u6666\u6DA9\uFF0C\u4F46\u8BFB\u5B8C\u540E\u5C31\u4F1A\u641E\u660E\u767D\u201C\u4EE3\u7801\u8DD1\u8D77\u6765\u7684\u65F6\u5019\u5B9E\u9645\u53D1\u751F\u4E86\u4EC0\u4E48\u201D\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/ccc-4.jpg" alt=""></p><p>\u65E2\u7136\u6709\u4E09\u672C\u4E66\u90FD\u662F\u4FAF\u6377\u8001\u5E08\u7684\uFF0C\u90A3\u518D\u5237\u4E00\u5237\u4FAF\u6377\u8001\u5E08\u7684\u89C6\u9891\uFF0C\u5C82\u4E0D\u662F\u6548\u679C\u66F4\u4F73\uFF1F\u4E0D\u8FC7\uFF0C\u7531\u4E8E\u6D89\u53CA\u5230\u7248\u6743\uFF0C\u56FD\u5185\u7684 B \u7AD9\u3001A \u7AD9\u90FD\u4E0B\u67B6\u4E86\u76F8\u5173\u7684\u89C6\u9891\u8D44\u6E90\uFF0C\u5305\u62EC\uFF1A</p><ul><li>\u300AC++\u9762\u5411\u5BF9\u8C61\u9AD8\u7EA7\u7F16\u7A0B\u300B</li><li>\u300ASTL\u300B</li><li>\u300AC++ \u5185\u5B58\u7BA1\u7406\u300B</li><li>\u300AC++ 11 \u65B0\u7279\u6027\u300B</li><li>\u300AC++ \u7A0B\u5E8F\u7684\u751F\u524D\u6B7B\u540E\u300B</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/ccc-5.png" alt=""></p><p>\u6211\u4ECE\u7F51\u4E0A down \u4E86\u4E00\u4EFD\uFF0C\u4FDD\u5B58\u5230\u4E86\u672C\u5730\u3002\u9700\u8981\u7684\u5C0F\u4F19\u4F34\u8BF7\u957F\u6309\u8BC6\u522B/\u626B\u63CF\u4E0B\u65B9\u7684\u4E8C\u7EF4\u7801\u5173\u6CE8\u4F5C\u8005\u7684\u539F\u521B\u516C\u4F17\u53F7\u300C<strong>\u6C89\u9ED8\u738B\u4E8C</strong>\u300D\u56DE\u590D\u5173\u952E\u5B57\u300C<strong>cpp</strong>\u300D\u5C31\u53EF\u4EE5\u62C9\u53D6\u5230\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongzhonghao.png" alt="\u56DE\u590D\u5173\u952E\u5B57\u300Ccpp\u300D"></p><p>\u66F4\u591A C++ \u7684\u5B66\u4E60\u8D44\u6599\uFF0C\u53EF\u4EE5\u76F4\u63A5\u6233\u6211\u6574\u7406\u7684\u8FD9\u4E2A GitHub/\u7801\u4E91\u4ED3\u5E93\u2014\u2014\u{1F4DA}\u7A0B\u5E8F\u5458\u5FC5\u8BFB\u4E66\u5355\u6574\u7406\uFF0C\u9644\u4E0B\u8F7D\u5730\u5740\uFF0C\u91CC\u9762\u6709\u5927\u91CF\u7684 C++ \u5B66\u4E60\u8D44\u6599\u3002</p>',17),m=t("GitHub \u5730\u5740\uFF1A"),b={href:"https://github.com/itwanger/JavaBooks#c-1",target:"_blank",rel:"noopener noreferrer"},g=t("https://github.com/itwanger/JavaBooks"),h=t("\u7801\u4E91\u5730\u5740\uFF1A"),d={href:"https://gitee.com/itwanger/JavaBooks#c-1",target:"_blank",rel:"noopener noreferrer"},_=t("https://gitee.com/itwanger/JavaBooks"),u=r('<p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/cpp-books.jpg" alt=""></p><p>\u7B80\u5355\u7F57\u5217\u4E00\u4E0B\uFF1A</p><ul><li>\u5927\u89C4\u6A21c++\u7A0B\u5E8F\u8BBE\u8BA1</li><li>\u725B\u5BA2\u6821\u62DB\u9762\u8BD5\u9898\uFF08\u9644\u7B54\u6848\u4E0E\u89E3\u6790\uFF09c++\u7BC7</li><li>\u6DF1\u5EA6\u63A2\u7D22C++\u5BF9\u8C61\u6A21\u578B PDF\u4E2D\u6587\u6E05\u6670\u7248</li><li>\u6DF1\u5165\u7406\u89E3c11(c11\u65B0\u7279\u6027\u89E3\u6790\u4E0E\u5E94\u7528)</li><li>C++ Primer \u7B2C\u4E94\u7248--- \u9AD8\u6E05\u7248</li><li>C++\u8BED\u8A00\u7684\u8BBE\u8BA1\u548C\u6F14\u5316</li><li>Effective.Modern.C++ - \u4E2D\u6587\u7248</li><li>Effective+STL\u4E2D\u6587\u7248\uFF1A50\u6761\u6709\u6548\u4F7F\u7528STL\u7684\u7ECF\u9A8C</li><li>More Effective C++\u4E2D\u6587</li><li>STL\u6E90\u7801\u5256\u6790--\u4FAF\u6377</li></ul>',3);function v(x,f){const a=o("ExternalLinkIcon");return l(),n("div",null,[s,e("ul",null,[e("li",null,[m,e("a",b,[g,i(a)])]),e("li",null,[h,e("a",d,[_,i(a)])])]),u])}var k=c(p,[["render",v],["__file","ccc.html.vue"]]);export{k as default};
+import{_ as c}from"./plugin-vue_export-helper.21dcd24c.js";import{r as o,o as l,c as n,a as e,b as i,e as r,d as t}from"./app.615e41d8.js";const p={},s=r('<h1 id="c-\u5B66\u4E60\u8DEF\u7EBF-\u5EFA\u8BAE\u6536\u85CF" tabindex="-1"><a class="header-anchor" href="#c-\u5B66\u4E60\u8DEF\u7EBF-\u5EFA\u8BAE\u6536\u85CF" aria-hidden="true">#</a> C++\u5B66\u4E60\u8DEF\u7EBF\uFF08\u5EFA\u8BAE\u6536\u85CF\u{1F44D}\uFF09</h1><p>\u5B66\u4E60 C++ \u8BED\u6CD5\uFF0C\u9996\u63A8\u300AC++ Primer \u7B2C\u4E94\u7248\u300B\u3002\u6211\u5728\u53C2\u52A0\u7B2C\u4E00\u4EFD\u5DE5\u4F5C\u7684\u65F6\u5019\uFF0C\u5C31\u4E70\u8FC7\u4E00\u672C\u300AC++ Primer \u7B2C\u56DB\u7248\u300B\uFF0C\u8FD9\u672C\u4E66\u4E00\u76F4\u4E0D\u820D\u5F97\u6254\uFF0C\u5C3D\u7BA1\u5B83\u5DF2\u7ECF\u975E\u5E38\u7834\u4E86\uFF0C\u4F46\u6211\u4EEC\u4E4B\u95F4\u7684\u611F\u60C5\u662F\u6DF1\u539A\u7684\uFF0C\u6BD5\u7ADF\u8DDF\u968F\u6211\u8F97\u8F6C\u4E86\u597D\u51E0\u4E2A\u57CE\u5E02\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/ccc-primer-book.png" alt=""></p><p><em>\u662F\u4E0D\u662F\u4E00\u4E0B\u5B50\u5C31\u66B4\u9732\u81EA\u5DF1\u5DE5\u4F5C\u5E74\u9650\u4E86</em>\uFF1F</p><p>\u8FD9\u672C\u4E66\u975E\u5E38\u5168\u9762\u5730\u8BB2\u89E3\u4E86 C++ \u7684\u8BED\u6CD5\u4EE5\u53CA C++ \u7684\u5404\u79CD\u7279\u6027\uFF0C\u5982\u679C\u80FD\u575A\u6301\u770B\u5B8C\u7684\u8BDD\uFF0C\u5E2E\u52A9\u4F1A\u5F88\u5927\u3002\u5982\u679C\u65F6\u95F4\u6BD4\u8F83\u5145\u5206\u7684\u8BDD\uFF0C\u5EFA\u8BAE\u81F3\u5C11\u770B\u4E24\u904D\u3002\u5982\u679C\u65F6\u95F4\u6BD4\u8F83\u7D27\u5F20\u7684\u8BDD\uFF0C\u81F3\u5C11\u901A\u8BFB\u4E00\u904D\u5427\uFF0C\u8981\u80FD\u628A\u63E1\u4F4F\u8FD9\u672C\u4E66\u7684\u5927\u4F53\u6846\u67B6\uFF0C\u7136\u540E\u7ED3\u5408\u4E2A\u4EBA\u7684\u5B9E\u9645\u60C5\u51B5\u9009\u62E9\u6027\u5730\u770B\u4E00\u4E9B\u91CD\u70B9\u7AE0\u8282\u3002</p><p>\u7136\u540E\u662F\u300AEffective C++\u300B\uFF0C\u4FAF\u6377\u8001\u5E08\u8BD1\u7684\uFF0C\u8FD9\u672C\u4E66\u4E3B\u8981\u8BB2\u89E3\u4E86\u7F16\u5199 C++ \u4EE3\u7801\u9700\u8981\u6CE8\u610F\u7684\u4E00\u4E9B\u6761\u6B3E\uFF0C\u548C\u300AEffective Java\u300B \u5C5E\u4E8E\u540C\u4E00\u4E2A\u7CFB\u5217\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/ccc-2.jpg" alt=""></p><p>\u7B2C\u4E09\u672C\u662F\u300ASTL\u6E90\u7801\u5256\u6790\u300B\u8FD9\u672C\u4E66\uFF0C\u4FAF\u6377\u8001\u5E08\u5199\u7684\uFF0C\u8FD9\u672C\u4E66\u8BB2\u4E86C++\u7684\u5E95\u5C42\u5B9E\u73B0\uFF0C\u5305\u62EC\u5404\u79CD\u5BB9\u5668\uFF08vector\u3001list\u3001heap\u3001deque\u3001Red Black tree\u3001hash table\u3001set/map\uFF09\u7684\u5B9E\u73B0\u3001\u5404\u79CD\u5E38\u89C1\u7B97\u6CD5\uFF08\u6392\u5E8F\u3001\u67E5\u627E\u3001\u6392\u5217\u7EC4\u5408\u3001\u6570\u636E\u79FB\u52A8\u4E0E\u590D\u5236\u6280\u672F\uFF09\u7684\u5B9E\u73B0\u7B49\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/ccc-3.png" alt=""></p><p>\u7B2C\u56DB\u672C\u300A\u6DF1\u5EA6\u63A2\u7D22C++\u5BF9\u8C61\u6A21\u578B\u300B\uFF0C\u4FAF\u6377\u8001\u5E08\u8BD1\u7684\uFF0C\u8FD9\u672C\u4E66\u8BB2\u89E3\u4E86 C++ \u9762\u5411\u5BF9\u8C61\u7279\u6027\u7684\u5E95\u5C42\u5B9E\u73B0\u673A\u5236\uFF0C\u8BFB\u8D77\u6765\u867D\u7136\u6709\u70B9\u6666\u6DA9\uFF0C\u4F46\u8BFB\u5B8C\u540E\u5C31\u4F1A\u641E\u660E\u767D\u201C\u4EE3\u7801\u8DD1\u8D77\u6765\u7684\u65F6\u5019\u5B9E\u9645\u53D1\u751F\u4E86\u4EC0\u4E48\u201D\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/ccc-4.jpg" alt=""></p><p>\u65E2\u7136\u6709\u4E09\u672C\u4E66\u90FD\u662F\u4FAF\u6377\u8001\u5E08\u7684\uFF0C\u90A3\u518D\u5237\u4E00\u5237\u4FAF\u6377\u8001\u5E08\u7684\u89C6\u9891\uFF0C\u5C82\u4E0D\u662F\u6548\u679C\u66F4\u4F73\uFF1F\u4E0D\u8FC7\uFF0C\u7531\u4E8E\u6D89\u53CA\u5230\u7248\u6743\uFF0C\u56FD\u5185\u7684 B \u7AD9\u3001A \u7AD9\u90FD\u4E0B\u67B6\u4E86\u76F8\u5173\u7684\u89C6\u9891\u8D44\u6E90\uFF0C\u5305\u62EC\uFF1A</p><ul><li>\u300AC++\u9762\u5411\u5BF9\u8C61\u9AD8\u7EA7\u7F16\u7A0B\u300B</li><li>\u300ASTL\u300B</li><li>\u300AC++ \u5185\u5B58\u7BA1\u7406\u300B</li><li>\u300AC++ 11 \u65B0\u7279\u6027\u300B</li><li>\u300AC++ \u7A0B\u5E8F\u7684\u751F\u524D\u6B7B\u540E\u300B</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/ccc-5.png" alt=""></p><p>\u6211\u4ECE\u7F51\u4E0A down \u4E86\u4E00\u4EFD\uFF0C\u4FDD\u5B58\u5230\u4E86\u672C\u5730\u3002\u9700\u8981\u7684\u5C0F\u4F19\u4F34\u8BF7\u957F\u6309\u8BC6\u522B/\u626B\u63CF\u4E0B\u65B9\u7684\u4E8C\u7EF4\u7801\u5173\u6CE8\u4F5C\u8005\u7684\u539F\u521B\u516C\u4F17\u53F7\u300C<strong>\u6C89\u9ED8\u738B\u4E8C</strong>\u300D\u56DE\u590D\u5173\u952E\u5B57\u300C<strong>cpp</strong>\u300D\u5C31\u53EF\u4EE5\u62C9\u53D6\u5230\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongzhonghao.png" alt="\u56DE\u590D\u5173\u952E\u5B57\u300Ccpp\u300D"></p><p>\u66F4\u591A C++ \u7684\u5B66\u4E60\u8D44\u6599\uFF0C\u53EF\u4EE5\u76F4\u63A5\u6233\u6211\u6574\u7406\u7684\u8FD9\u4E2A GitHub/\u7801\u4E91\u4ED3\u5E93\u2014\u2014\u{1F4DA}\u7A0B\u5E8F\u5458\u5FC5\u8BFB\u4E66\u5355\u6574\u7406\uFF0C\u9644\u4E0B\u8F7D\u5730\u5740\uFF0C\u91CC\u9762\u6709\u5927\u91CF\u7684 C++ \u5B66\u4E60\u8D44\u6599\u3002</p>',17),m=t("GitHub \u5730\u5740\uFF1A"),b={href:"https://github.com/itwanger/JavaBooks#c-1",target:"_blank",rel:"noopener noreferrer"},g=t("https://github.com/itwanger/JavaBooks"),h=t("\u7801\u4E91\u5730\u5740\uFF1A"),d={href:"https://gitee.com/itwanger/JavaBooks#c-1",target:"_blank",rel:"noopener noreferrer"},_=t("https://gitee.com/itwanger/JavaBooks"),u=r('<p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/cpp-books.jpg" alt=""></p><p>\u7B80\u5355\u7F57\u5217\u4E00\u4E0B\uFF1A</p><ul><li>\u5927\u89C4\u6A21c++\u7A0B\u5E8F\u8BBE\u8BA1</li><li>\u725B\u5BA2\u6821\u62DB\u9762\u8BD5\u9898\uFF08\u9644\u7B54\u6848\u4E0E\u89E3\u6790\uFF09c++\u7BC7</li><li>\u6DF1\u5EA6\u63A2\u7D22C++\u5BF9\u8C61\u6A21\u578B PDF\u4E2D\u6587\u6E05\u6670\u7248</li><li>\u6DF1\u5165\u7406\u89E3c11(c11\u65B0\u7279\u6027\u89E3\u6790\u4E0E\u5E94\u7528)</li><li>C++ Primer \u7B2C\u4E94\u7248--- \u9AD8\u6E05\u7248</li><li>C++\u8BED\u8A00\u7684\u8BBE\u8BA1\u548C\u6F14\u5316</li><li>Effective.Modern.C++ - \u4E2D\u6587\u7248</li><li>Effective+STL\u4E2D\u6587\u7248\uFF1A50\u6761\u6709\u6548\u4F7F\u7528STL\u7684\u7ECF\u9A8C</li><li>More Effective C++\u4E2D\u6587</li><li>STL\u6E90\u7801\u5256\u6790--\u4FAF\u6377</li></ul>',3);function v(x,f){const a=o("ExternalLinkIcon");return l(),n("div",null,[s,e("ul",null,[e("li",null,[m,e("a",b,[g,i(a)])]),e("li",null,[h,e("a",d,[_,i(a)])])]),u])}var k=c(p,[["render",v],["__file","ccc.html.vue"]]);export{k as default};
diff --git a/dist/assets/chadiansanhuo.html.78becde9.js b/dist/assets/chadiansanhuo.html.fc173db8.js
similarity index 99%
rename from dist/assets/chadiansanhuo.html.78becde9.js
rename to dist/assets/chadiansanhuo.html.fc173db8.js
index 09d7fda6..9ab3a53f 100644
--- a/dist/assets/chadiansanhuo.html.78becde9.js
+++ b/dist/assets/chadiansanhuo.html.fc173db8.js
@@ -1 +1 @@
-import{_ as o}from"./plugin-vue_export-helper.21dcd24c.js";import{r as n,o as r,c as s,a as e,b as c,e as a,d as p}from"./app.a0271b9c.js";const i={},h=a('<p>\u5927\u5BB6\u597D\uFF0C\u6211\u662F\u4E8C\u54E5\u5440\uFF01</p><p>\u4ECA\u5929\u548C\u4E24\u4E2A\u5408\u4F19\u4EBA\u5F00\u4E86\u4E2A\u817E\u8BAF\u4F1A\u8BAE\uFF0C\u6CA1\u60F3\u5230\u5DEE\u70B9\u56E0\u4E3A\u4E00\u4E2A\u529F\u80FD\u4E0A\u7684\u5206\u6B67\u6563\u4E86\u4F19\uFF01\uFF01\u597D\u5728\u5927\u5BB6\u90FD\u662F\u5954\u4E09\u7684\u7537\u4EBA\u4E86\uFF0C\u5435\u5F52\u5435\uFF0C\u4F46\u90FD\u662F\u5954\u7740\u505A\u4E8B\u53BB\u7684\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/chadiansanhuo-1.png" alt=""></p><p>\u4E0D\u8FC7\u51B7\u9759\u4E0B\u6765\u540E\uFF0C\u6211\u611F\u89C9\u4E3B\u8981\u7684\u8D23\u4EFB\u5728\u6211\uFF0C\u6240\u4EE5\u6211\u6253\u7B97\u5199\u7BC7\u6587\u7AE0\u53CD\u601D\u4E00\u4E0B\u81EA\u5DF1\u3002</p><p>\u6211\u53EF\u4EE5\u9009\u62E9\u6084\u6084\u5730\u8BB0\u5728\u5907\u5FD8\u5F55\u91CC\uFF0C\u4F46\u6211\u89C9\u5F97\u5206\u4EAB\u51FA\u6765\u66F4\u6B63\u5F0F\u4E00\u70B9\uFF0C\u4E5F\u987A\u5E26\u8868\u660E\u4E00\u4E0B\u81EA\u5DF1\u7684\u51B3\u5FC3\u3002\u8FD8\u6709\u5C31\u662F\uFF0C\u4EE5\u524D\u6211\u603B\u662F\u6BEB\u65E0\u4FDD\u7559\u7684\uFF0C\u4EC0\u4E48\u90FD\u7ED9\u5927\u5BB6\u5206\u4EAB\uFF0C\u53EF\u968F\u7740\u5173\u6CE8\u7684\u4EBA\u6570\u8D8A\u6765\u8D8A\u591A\uFF0C\u5C31\u6162\u6162\u53D8\u5F97\u8D8A\u6765\u8D8A\u6536\u655B\u3002</p><p>\u8FD9\u4E00\u70B9\u8001\u8BFB\u8005\u5E94\u8BE5\u80FD\u611F\u53D7\u5F97\u5230\u3002\u4ECA\u5929\u7ECF\u8FC7\u6C89\u75DB\u7684\u53CD\u601D\u540E\uFF0C\u6211\u51B3\u5B9A\u8FD8\u662F\u505A\u56DE\u4ECE\u524D\u7684\u81EA\u5DF1\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/chadiansanhuo-2.png" alt=""></p><p>\u4EBA\u4E0D\u80FD\u60A3\u5F97\u60A3\u5931\uFF0C\u5426\u5219\u5C31\u53D8\u5F97\u8C28\u5C0F\u614E\u5FAE\uFF0C\u5F88\u591A\u8BDD\u5F88\u591A\u4E8B\u5C31\u4E0D\u6562\u8BF4\u4E0D\u6562\u505A\u4E86\u3002</p><hr><p>\u8BB0\u5F97\u6211 2 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diff --git a/dist/assets/chengdu.html.09b27f2f.js b/dist/assets/chengdu.html.09b27f2f.js
deleted file mode 100644
index 6c48902d..00000000
--- a/dist/assets/chengdu.html.09b27f2f.js
+++ /dev/null
@@ -1 +0,0 @@
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diff --git a/dist/assets/chengdu.html.7221dfab.js b/dist/assets/chengdu.html.7221dfab.js
new file mode 100644
index 00000000..ab2d1356
--- /dev/null
+++ b/dist/assets/chengdu.html.7221dfab.js
@@ -0,0 +1 @@
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\u7F8E\u56E2\u6210\u90FD\u7814\u53D1\u4E2D\u5FC3</h2><ul><li>\u7C7B\u578B\uFF1A\u4E92\u8054\u7F51</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u5929\u5E9C\u4E00\u8857\u4E24\u6C5F\u56FD\u9645A\u5EA7</li><li>\u7F51\u5740\uFF1Ahttps://campus.meituan.com/</li></ul><hr><h2 id="\u6EF4\u6EF4\u6210\u90FD\u7814\u53D1\u4E2D\u5FC3" tabindex="-1"><a class="header-anchor" href="#\u6EF4\u6EF4\u6210\u90FD\u7814\u53D1\u4E2D\u5FC3" aria-hidden="true">#</a> \u6EF4\u6EF4\u6210\u90FD\u7814\u53D1\u4E2D\u5FC3</h2><ul><li>\u7C7B\u578B\uFF1A\u51FA\u884C\u3001\u4E92\u8054\u7F51</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u9526\u6C5F\u533A\u5929\u5E9C\u56FD\u9645\u5927\u53A6</li><li>\u7F51\u5740\uFF1Ahttps://talent.didiglobal.com/</li></ul><hr><h2 id="\u65B0\u6D6A\u5FAE\u535A\u6210\u90FD\u7814\u53D1\u4E2D\u5FC3" tabindex="-1"><a class="header-anchor" href="#\u65B0\u6D6A\u5FAE\u535A\u6210\u90FD\u7814\u53D1\u4E2D\u5FC3" aria-hidden="true">#</a> \u65B0\u6D6A\u5FAE\u535A\u6210\u90FD\u7814\u53D1\u4E2D\u5FC3</h2><ul><li>\u7C7B\u578B\uFF1A\u4E92\u8054\u7F51</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u6B66\u4FAF\u533A\u5929\u5E9C\u8F6F\u4EF6\u56EDC\u533A</li><li>\u7F51\u5740\uFF1Ahttps://career.sina.com.cn/</li></ul><hr><h2 id="\u4E2D\u5174\u6210\u90FD\u7814\u53D1\u4E2D\u5FC3" tabindex="-1"><a class="header-anchor" href="#\u4E2D\u5174\u6210\u90FD\u7814\u53D1\u4E2D\u5FC3" aria-hidden="true">#</a> \u4E2D\u5174\u6210\u90FD\u7814\u53D1\u4E2D\u5FC3</h2><ul><li>\u7C7B\u578B\uFF1A\u901A\u4FE1\u8BBE\u5907\u5546</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u6B66\u4FAF\u533A\u4E2D\u5174\u901A\u8BAF\u5927\u53A6</li><li>\u7F51\u5740\uFF1Ahttp://job.zte.com.cn/</li></ul><hr><h2 id="oppo-\u6210\u90FD" tabindex="-1"><a class="header-anchor" href="#oppo-\u6210\u90FD" aria-hidden="true">#</a> OPPO\uFF08\u6210\u90FD\uFF09</h2><ul><li>\u7C7B\u578B\uFF1A\u901A\u4FE1\u3001\u786C\u4EF6\u3001\u79FB\u52A8\u4E92\u8054\u7F51</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u6B66\u4FAF\u533AOCG\u56FD\u9645\u4E2D\u5FC3</li><li>\u7F51\u5740\uFF1Ahttp://oppo.zhaopin.com/</li></ul><hr><h2 id="\u7231\u5947\u827A-\u6210\u90FD" tabindex="-1"><a class="header-anchor" href="#\u7231\u5947\u827A-\u6210\u90FD" aria-hidden="true">#</a> \u7231\u5947\u827A\uFF08\u6210\u90FD\uFF09</h2><ul><li>\u7C7B\u578B\uFF1A\u89C6\u9891\u3001\u4E92\u8054\u7F51</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u6B66\u4FAF\u533A\u5929\u5E9C\u8F6F\u4EF6\u56EDE\u533A</li><li>\u7F51\u5740\uFF1Ahttps://careers.iqiyi.com/</li></ul><hr><h2 id="\u643A\u7A0B\u6210\u90FD\u7814\u53D1\u4E2D\u5FC3" tabindex="-1"><a class="header-anchor" href="#\u643A\u7A0B\u6210\u90FD\u7814\u53D1\u4E2D\u5FC3" aria-hidden="true">#</a> \u643A\u7A0B\u6210\u90FD\u7814\u53D1\u4E2D\u5FC3</h2><ul><li>\u7C7B\u578B\uFF1A\u4E92\u8054\u7F51</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u6B66\u4FAF\u533A\u5929\u5E9C\u56DB\u8857\u643A\u7A0B\u5927\u53A6</li><li>\u7F51\u5740\uFF1Ahttps://careers.ctrip.com/index.html#/</li></ul><hr><h2 id="\u5546\u6C64\u79D1\u6280-\u6210\u90FD" tabindex="-1"><a class="header-anchor" href="#\u5546\u6C64\u79D1\u6280-\u6210\u90FD" aria-hidden="true">#</a> \u5546\u6C64\u79D1\u6280\uFF08\u6210\u90FD\uFF09</h2><ul><li>\u7C7B\u578B\uFF1A\u4EBA\u5DE5\u667A\u80FD</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u5929\u5E9C\u65B0\u533A\u5929\u5E9C\u7B90\u5BB9\u4E2D\u5FC3</li><li>\u7F51\u5740\uFF1Ahttps://www.sensetime.com/cn/join-index</li></ul><hr><h2 id="\u4EAC\u4E1C\u6210\u90FD\u7814\u53D1\u4E2D\u5FC3" tabindex="-1"><a class="header-anchor" href="#\u4EAC\u4E1C\u6210\u90FD\u7814\u53D1\u4E2D\u5FC3" aria-hidden="true">#</a> \u4EAC\u4E1C\u6210\u90FD\u7814\u53D1\u4E2D\u5FC3</h2><ul><li>\u7C7B\u578B\uFF1A\u7535\u5546\u3001\u4E92\u8054\u7F51</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u6B66\u4FAF\u533A\u6B66\u5174\u4E09\u8DEF\u897F\u90E8\u667A\u8C37D\u533A</li><li>\u7F51\u5740\uFF1Ahttps://about.jd.com/zhaopin/</li></ul><hr><h2 id="\u79D1\u5927\u8BAF\u98DE-\u6210\u90FD" tabindex="-1"><a class="header-anchor" href="#\u79D1\u5927\u8BAF\u98DE-\u6210\u90FD" aria-hidden="true">#</a> \u79D1\u5927\u8BAF\u98DE\uFF08\u6210\u90FD\uFF09</h2><ul><li>\u7C7B\u578B\uFF1A\u4EBA\u5DE5\u667A\u80FD\u3001\u6570\u636E\u670D\u52A1</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u5929\u5E9C\u65B0\u533A\u83C1\u84C9\u4E2D\u5FC3A\u533A</li><li>\u7F51\u5740\uFF1Ahttps://candidate.iflytek.com/</li></ul><hr><h2 id="thoughtworks-\u6210\u90FD" tabindex="-1"><a class="header-anchor" href="#thoughtworks-\u6210\u90FD" aria-hidden="true">#</a> ThoughtWorks\uFF08\u6210\u90FD\uFF09</h2><ul><li>\u7C7B\u578B\uFF1A\u4F01\u4E1A\u670D\u52A1\u3001\u4FE1\u606F\u5B89\u5168</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u6B66\u4FAF\u533A\u5929\u5E9C\u8F6F\u4EF6\u56EDE\u533A</li><li>\u7F51\u5740\uFF1Ahttps://www.thoughtworks.com</li></ul><hr><h2 id="garmin\u4F73\u660E" tabindex="-1"><a class="header-anchor" href="#garmin\u4F73\u660E" aria-hidden="true">#</a> GARMIN\u4F73\u660E</h2><ul><li>\u7C7B\u578B\uFF1A\u901A\u8BAF\u7535\u5B50\uFF0C\u667A\u80FD\u786C\u4EF6</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u6B66\u4FAF\u533A\u5929\u5E9C\u8F6F\u4EF6\u56EDC\u533A</li><li>\u7F51\u5740\uFF1Ahttps://www.garmin.com.cn/job/</li></ul><hr><h2 id="\u6781\u7C73\u79D1\u6280" tabindex="-1"><a class="header-anchor" href="#\u6781\u7C73\u79D1\u6280" aria-hidden="true">#</a> \u6781\u7C73\u79D1\u6280</h2><ul><li>\u7C7B\u578B\uFF1A\u786C\u4EF6\u3001\u7535\u5546</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u6B66\u4FAF\u533A\u5929\u5E9C\u8F6F\u4EF6\u56EDA\u533A</li><li>\u7F51\u5740\uFF1Ahttps://www.xgimi.com/</li></ul><hr><h2 id="\u805A\u7F8E\u4F18\u54C1" tabindex="-1"><a class="header-anchor" href="#\u805A\u7F8E\u4F18\u54C1" aria-hidden="true">#</a> \u805A\u7F8E\u4F18\u54C1</h2><ul><li>\u7C7B\u578B\uFF1A\u7535\u5546</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u6B66\u4FAF\u533A\u5929\u5E9C\u8F6F\u4EF6\u56EDG\u533A</li><li>\u7F51\u5740\uFF1Ahttp://www.jumei.com</li></ul><hr><h2 id="\u9524\u5B50\u79D1\u6280-\u5FFD\u7565" tabindex="-1"><a class="header-anchor" href="#\u9524\u5B50\u79D1\u6280-\u5FFD\u7565" aria-hidden="true">#</a> \u9524\u5B50\u79D1\u6280\uFF08\u5FFD\u7565\uFF09</h2><ul><li>\u7C7B\u578B\uFF1A\u786C\u4EF6\u3001\u79FB\u52A8\u4E92\u8054\u7F51</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u6210\u534E\u533A\u9F99\u6F6D\u5DE5\u4E1A\u56ED</li><li>\u7F51\u5740\uFF1Ahttps://www.smartisan.com/support/#/join</li></ul><hr><h2 id="\u5B8C\u7F8E\u4E16\u754C-\u6210\u90FD" tabindex="-1"><a class="header-anchor" href="#\u5B8C\u7F8E\u4E16\u754C-\u6210\u90FD" aria-hidden="true">#</a> \u5B8C\u7F8E\u4E16\u754C\uFF08\u6210\u90FD\uFF09</h2><ul><li>\u7C7B\u578B\uFF1A\u6E38\u620F\u3001\u79FB\u52A8\u4E92\u8054\u7F51</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u6B66\u4FAF\u533A\u5929\u5E9C\u8F6F\u4EF6\u56EDC\u533A\u5B8C\u7F8E\u4E16\u754C\u5927\u697C</li><li>\u7F51\u5740\uFF1Ahttp://jobs.wanmei.com/</li></ul><hr><h2 id="\u591A\u76CA\u7F51\u7EDC-\u6210\u90FD" tabindex="-1"><a class="header-anchor" href="#\u591A\u76CA\u7F51\u7EDC-\u6210\u90FD" aria-hidden="true">#</a> \u591A\u76CA\u7F51\u7EDC\uFF08\u6210\u90FD\uFF09</h2><ul><li>\u7C7B\u578B\uFF1A\u6E38\u620F\u3001\u79FB\u52A8\u4E92\u8054\u7F51</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u6B66\u4FAF\u533A\u5929\u5E9C\u8F6F\u4EF6\u56EDG\u533A</li><li>\u7F51\u5740\uFF1Ahttps://xz.duoyi.com/</li></ul><hr><h2 id="\u5F53\u4E50\u7F51" tabindex="-1"><a class="header-anchor" href="#\u5F53\u4E50\u7F51" aria-hidden="true">#</a> \u5F53\u4E50\u7F51</h2><ul><li>\u7C7B\u578B\uFF1A\u6E38\u620F\u3001\u79FB\u52A8\u4E92\u8054\u7F51</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u9AD8\u65B0\u533A\u5929\u5E9C\u8F6F\u4EF6\u56EDE\u533A1\u53F7\u697C</li><li>\u7F51\u5740\uFF1Ahttps://www.d.cn/hr/</li></ul><hr><h2 id="\u5B9E\u4E60\u50E7" tabindex="-1"><a class="header-anchor" href="#\u5B9E\u4E60\u50E7" aria-hidden="true">#</a> \u5B9E\u4E60\u50E7</h2><ul><li>\u7C7B\u578B\uFF1A\u62DB\u8058\u3001\u4F01\u4E1A\u670D\u52A1</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u6B66\u4FAF\u533A\u5929\u5E9C\u4E94\u8857\u8F6F\u4EF6\u56EDG\u533A7\u680B</li><li>\u7F51\u5740\uFF1Ahttps://www.shixiseng.com/tc/normal/mx2021</li></ul><hr><h2 id="\u8FC5\u6E38\u7F51\u7EDC" tabindex="-1"><a class="header-anchor" href="#\u8FC5\u6E38\u7F51\u7EDC" aria-hidden="true">#</a> \u8FC5\u6E38\u7F51\u7EDC</h2><ul><li>\u7C7B\u578B\uFF1A\u6E38\u620F</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u6B66\u4FAF\u533A\u5929\u5E9C\u8F6F\u4EF6\u56EDD\u533A</li><li>\u7F51\u5740\uFF1Ahttp://www.xunyou.com/hr/</li></ul><hr><h2 id="\u8DA3\u4E50\u591A" tabindex="-1"><a class="header-anchor" href="#\u8DA3\u4E50\u591A" aria-hidden="true">#</a> \u8DA3\u4E50\u591A</h2><ul><li>\u7C7B\u578B\uFF1A\u6E38\u620F</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u6B66\u4FAF\u533A\u5929\u5E9C\u8F6F\u4EF6\u56EDC\u533A</li></ul><hr><h2 id="\u7406\u60F3\u5883\u754C" tabindex="-1"><a class="header-anchor" href="#\u7406\u60F3\u5883\u754C" aria-hidden="true">#</a> \u7406\u60F3\u5883\u754C</h2><ul><li>\u7C7B\u578B\uFF1A\u667A\u80FD\u786C\u4EF6\u3001\u663E\u793A\u6280\u672F</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u6B66\u4FAF\u533A\u5929\u5E9C\u8F6F\u4EF6\u56EDA\u533A</li><li>\u7F51\u5740\uFF1Ahttp://www.idealsee.com/home</li></ul><hr><h2 id="\u5495-\u549A" tabindex="-1"><a class="header-anchor" href="#\u5495-\u549A" aria-hidden="true">#</a> \u5495 \u549A</h2><ul><li>\u7C7B\u578B\uFF1A\u79FB\u52A8\u4E92\u8054\u7F51</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u6B66\u4FAF\u533A\u5929\u5E9C\u8F6F\u4EF6\u56EDD\u533A</li><li>\u7F51\u5740\uFF1Ahttps://www.codoon.com/</li></ul><hr><h2 id="\u767E\u8BCD\u65A9" tabindex="-1"><a class="header-anchor" href="#\u767E\u8BCD\u65A9" aria-hidden="true">#</a> \u767E\u8BCD\u65A9</h2><ul><li>\u7C7B\u578B\uFF1A\u6559\u80B2\u3001\u79FB\u52A8\u4E92\u8054\u7F51</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u6B66\u4FAF\u533A\u5929\u5E9C\u4E94\u8857\u5929\u5E9C\u8F6F\u4EF6\u56EDE\u533A</li><li>\u7F51\u5740\uFF1Ahttp://www.baicizhan.com/</li></ul><hr><h2 id="\u9C81\u5927\u5E08" tabindex="-1"><a class="header-anchor" href="#\u9C81\u5927\u5E08" aria-hidden="true">#</a> \u9C81\u5927\u5E08</h2><ul><li>\u7C7B\u578B\uFF1A\u5DE5\u5177\u3001\u79FB\u52A8\u4E92\u8054\u7F51</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u6B66\u4FAF\u533A\u5929\u5E9C\u8F6F\u4EF6\u56EDE\u533A</li><li>\u7F51\u5740\uFF1Ahttps://www.ludashi.com/</li></ul><hr><h2 id="\u4F18\u5BA2\u9038\u5BB6" tabindex="-1"><a class="header-anchor" href="#\u4F18\u5BA2\u9038\u5BB6" aria-hidden="true">#</a> \u4F18\u5BA2\u9038\u5BB6</h2><ul><li>\u7C7B\u578B\uFF1A\u79DF\u623F\u3001\u79FB\u52A8\u4E92\u8054\u7F51</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u6B66\u4FAF\u533A\u65E0\u56FD\u754C26\u680B</li><li>\u7F51\u5740\uFF1Ahttp://www.uoko.com/</li></ul><hr><h2 id="testbird" tabindex="-1"><a class="header-anchor" href="#testbird" aria-hidden="true">#</a> TestBird</h2><ul><li>\u7C7B\u578B\uFF1A\u4F01\u4E1A\u670D\u52A1\u3001\u79FB\u52A8\u4E92\u8054\u7F51</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u6B66\u4FAF\u533A\u5929\u5E9C\u8F6F\u4EF6\u56EDC\u533A</li><li>\u7F51\u5740\uFF1Ahttps://www.testbird.com/</li></ul><hr><h2 id="\u5B9E\u9A8C\u697C" tabindex="-1"><a class="header-anchor" href="#\u5B9E\u9A8C\u697C" aria-hidden="true">#</a> \u5B9E\u9A8C\u697C</h2><ul><li>\u7C7B\u578B\uFF1A\u5728\u7EBF\u6559\u80B2</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u6B66\u4FAF\u533A\u5929\u5E9C\u8F6F\u4EF6\u56EDE\u533A</li><li>\u7F51\u5740\uFF1Ahttp://www.shiyanlou.com</li></ul><hr><h2 id="\u897F\u74DC\u521B\u5BA2" tabindex="-1"><a class="header-anchor" href="#\u897F\u74DC\u521B\u5BA2" aria-hidden="true">#</a> \u897F\u74DC\u521B\u5BA2</h2><ul><li>\u7C7B\u578B\uFF1A\u6559\u80B2\u3001\u5C11\u513F\u7F16\u7A0B</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u6B66\u4FAF\u533AOCG\u56FD\u9645\u4E2D\u5FC3A\u5EA7</li><li>\u7F51\u5740\uFF1Ahttps://www.xiguacity.cn/</li></ul><hr><h2 id="\u533B\u8054" tabindex="-1"><a class="header-anchor" href="#\u533B\u8054" aria-hidden="true">#</a> \u533B\u8054</h2><ul><li>\u7C7B\u578B\uFF1A\u533B\u7597\u3001\u79FB\u52A8\u4E92\u8054\u7F51</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u6B66\u4FAF\u533A\u5929\u5E9C\u8F6F\u4EF6\u56EDB\u533A</li><li>\u7F51\u5740\uFF1Ahttps://www.medlinker.com/join/hr</li></ul><hr><h2 id="camera360" tabindex="-1"><a class="header-anchor" href="#camera360" aria-hidden="true">#</a> Camera360</h2><ul><li>\u7C7B\u578B\uFF1A\u79FB\u52A8\u5F71\u50CF</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u9AD8\u65B0\u533A\u5929\u5E9C\u8F6F\u4EF6\u56EDE\u533A</li><li>\u7F51\u5740\uFF1Ahttp://hr.camera360.com/</li></ul><hr><h2 id="\u5C0F\u9E21\u53EB\u53EB" tabindex="-1"><a class="header-anchor" href="#\u5C0F\u9E21\u53EB\u53EB" aria-hidden="true">#</a> \u5C0F\u9E21\u53EB\u53EB</h2><ul><li>\u7C7B\u578B\uFF1A\u5728\u7EBF\u6559\u80B2\u3001\u79FB\u52A8\u4E92\u8054\u7F51</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u6B66\u4FAF\u533A\u7687\u5EAD\u56FD\u9645A\u5EA7</li><li>\u7F51\u5740\uFF1Ahttps://www.jojoreading.com/</li></ul><hr><h2 id="\u6479\u5BA2" tabindex="-1"><a class="header-anchor" href="#\u6479\u5BA2" aria-hidden="true">#</a> \u6479\u5BA2</h2><ul><li>\u7C7B\u578B\uFF1A\u5DE5\u5177\u3001\u79FB\u52A8\u4E92\u8054\u7F51</li><li>\u4EE3\u8868\u4EA7\u54C1\uFF1AMockplus\u3001\u6479\u5BA2</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u53CC\u6D41\u533A\u53CC\u5174\u5927\u90531\u53F7\u7535\u5B50\u79D1\u6280\u56ED16\u680B</li><li>\u7F51\u5740\uFF1Ahttps://www.mockplus.cn/</li></ul><hr><h2 id="\u7F8E\u6D3D\u79D1\u6280" tabindex="-1"><a class="header-anchor" href="#\u7F8E\u6D3D\u79D1\u6280" aria-hidden="true">#</a> \u7F8E\u6D3D\u79D1\u6280</h2><ul><li>\u7C7B\u578B\uFF1A\u667A\u80FD\u5BA2\u670D\u3001\u4F01\u4E1A\u670D\u52A1</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u6B66\u4FAF\u533A\u5E0C\u987F\u56FD\u9645B\u5EA7</li><li>\u7F51\u5740\uFF1Ahttps://meiqia.com/about#joinus</li></ul><hr><h2 id="tap4fun" tabindex="-1"><a class="header-anchor" href="#tap4fun" aria-hidden="true">#</a> tap4fun</h2><ul><li>\u7C7B\u578B\uFF1A\u6E38\u620F\u3001\u624B\u6E38</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u6B66\u4FAF\u533A\u5929\u5E9C\u8F6F\u4EF6\u56EDA\u533A</li><li>\u7F51\u5740\uFF1Ahttps://www.tap4fun.com/</li></ul><hr><h2 id="\u77E5\u9053\u521B\u5B87" tabindex="-1"><a class="header-anchor" href="#\u77E5\u9053\u521B\u5B87" aria-hidden="true">#</a> \u77E5\u9053\u521B\u5B87</h2><ul><li>\u7C7B\u578B\uFF1A\u4FE1\u606F\u5B89\u5168</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u6B66\u4FAF\u533A\u817E\u8BAF\u5927\u53A6B\u5EA7</li><li>\u7F51\u5740\uFF1Ahttps://www.knownsec.com/#/jobs</li></ul><hr><h2 id="\u68A6\u5DE5\u5382" tabindex="-1"><a class="header-anchor" href="#\u68A6\u5DE5\u5382" aria-hidden="true">#</a> \u68A6\u5DE5\u5382</h2><ul><li>\u7C7B\u578B\uFF1A\u6E38\u620F</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u9526\u6C5F\u533A\u4E09\u8272\u8DEF38\u53F7\u535A\u745E\u521B\u610F\u6210\u90FD</li><li>\u7F51\u5740\uFF1Ahttp://www.dreamwork.cn/join.html</li></ul><hr><h2 id="\u5176\u4ED6" tabindex="-1"><a class="header-anchor" href="#\u5176\u4ED6" aria-hidden="true">#</a> \u5176\u4ED6</h2><ul><li><p>\u79FB\u82B1\u4E92\u52A8</p></li><li><p>\u76DB\u5927</p></li><li><p>\u62B9\u8336\u7F8E\u5986</p></li><li><p>\u54AA\u5495\u97F3\u4E50</p></li><li><p>\u901F\u9012\u6613</p></li><li><p>Tower</p></li><li><p>\u5BA2\u5982\u4E91</p></li><li><p>\u756A\u8304\u6765\u4E86</p></li><li><p>\u4E09\u4E03\u4E92\u5A31</p></li><li><p>\u7406\u60F3\u751F\u6D3B\u5B9E\u9A8C\u5BA4</p></li><li><p>\u9C7C\u8BF4\u79D1\u6280</p></li><li><p>\u94C1\u76AE\u4EBA\u79D1\u6280</p></li><li><p>\u5C0F\u5A31wifi</p></li><li><p>\u6781\u4F01</p></li><li><p>\u8D27\u8F66\u5E2E</p></li><li><p>\u9EA6\u9EA6\u517B\u8001</p></li><li><p>\u6D3B\u52A8\u5BB6</p></li><li><p>\u6742\u5FD7\u94FA</p></li><li><p>\u9EA6\u5BA2</p></li><li><p>\u6587\u8F69\u7F51</p></li><li><p>...\u7B49\u7B49</p></li></ul><hr><p>\u6700\u540E\uFF0C\u7531\u4E8E\u4E86\u89E3\u6709\u9650\uFF0C\u96BE\u514D\u4F1A\u6709\u758F\u6F0F\u548C\u4E0D\u5F53\uFF0C\u5C0F\u4F19\u4F34\u4EEC\u53EF\u4EE5\u7559\u8A00\u8865\u5145\uFF0C\u4F17\u4EBA\u62FE\u67F4\u706B\u7130\u9AD8\uFF01</p>',134),o=l("\u94FE\u63A5\uFF1A"),u={href:"https://mp.weixin.qq.com/s/eaX9QhLwy_VsGIH0apA4qw",target:"_blank",rel:"noopener noreferrer"},p=l("https://mp.weixin.qq.com/s/eaX9QhLwy_VsGIH0apA4qw"),w=i("p",null,[i("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png",alt:""})],-1);function m(b,x){const a=e("ExternalLinkIcon");return r(),t("div",null,[s,i("blockquote",null,[i("p",null,[o,i("a",u,[p,d(a)])])]),w])}var g=h(c,[["render",m],["__file","chengdu.html.vue"]]);export{g as default};
diff --git a/dist/assets/chengdu.html.8c0a9616.js b/dist/assets/chengdu.html.8c0a9616.js
deleted file mode 100644
index 88fbbad8..00000000
--- a/dist/assets/chengdu.html.8c0a9616.js
+++ /dev/null
@@ -1 +0,0 @@
-import{_ as h}from"./plugin-vue_export-helper.21dcd24c.js";import{r as e,o as r,c as t,a as i,b as d,e as n,d as l}from"./app.a0271b9c.js";const c={},s=n('<h1 id="\u6210\u90FD\u6709\u54EA\u4E9B\u725B\u6279\u7684\u4E92\u8054\u7F51\u516C\u53F8" tabindex="-1"><a class="header-anchor" href="#\u6210\u90FD\u6709\u54EA\u4E9B\u725B\u6279\u7684\u4E92\u8054\u7F51\u516C\u53F8" aria-hidden="true">#</a> \u6210\u90FD\u6709\u54EA\u4E9B\u725B\u6279\u7684\u4E92\u8054\u7F51\u516C\u53F8\uFF1F</h1><p>\u4ECA\u5929\u5E94\u5C0F\u4F19\u4F34\u4EEC\u7684\u8981\u6C42\uFF0C\u518D\u6765\u804A\u4E00\u804A\u7F8E\u4E3D\u7684<strong>\u56DB\u5DDD\u7701\u6210\u90FD\u5E02</strong>\u6709\u54EA\u4E9B\u9177\u9177\u7684IT/\u6280\u672F\u7C7B\u516C\u53F8\uFF08\u4E0D\u4EC5\u4EC5\u5C40\u9650\u4E8E\u7EAF\u4E92\u8054\u7F51\uFF09\u3002</p><p>\u6210\u90FD\u522B\u79F0\u84C9\u57CE\uFF0C\u662F\u897F\u90E8\u5730\u533A\u91CD\u8981\u7684\u4E2D\u5FC3\u57CE\u5E02\uFF0C\u81EA\u53E4\u5C31\u6709\u201C\u5929\u5E9C\u4E4B\u56FD\u201D\u7684\u7F8E\u8A89\u3002\u8D75\u96F7\u7684\u4E00\u66F2\u300A\u6210\u90FD\u300B\uFF0C\u628A\u84C9\u57CE\u8857\u5934\u7684\u4F11\u95F2\u6162\u60A0\u4E0E\u81EA\u5728\u6C14\u606F\u52FE\u52D2\u5F97\u6DCB\u6F13\u5C3D\u81F4\uFF0C\u95ED\u4E0A\u773C\uFF0C\u4EFF\u4F5B\u6211\u4E5F\u7F6E\u8EAB\u4E8E\u7389\u6797\u8DEF\u7684\u5C0F\u9152\u9986\u95E8\u53E3\u3002\u867D\u7136\u6211\u672C\u4EBA\u4ECE\u672A\u53BB\u8FC7\u6210\u90FD\uFF0C\u4F46\u65E9\u6709\u8033\u95FB\u90A3\u662F\u4E00\u5EA7\u6765\u4E86\u4FBF\u4E0D\u60F3\u8D70\u4E86\u7684\u57CE\u5E02\uFF0C\u6240\u4EE5\u6709\u673A\u4F1A\u4E00\u5B9A\u8981\u53BB\u6210\u90FD\u7684\u8857\u5934\u8D70\u4E00\u8D70\u3002</p><p>\u597D\u5566\uFF0C\u626F\u5F97\u6709\u70B9\u8FDC\u4E86\uFF0C\u63A5\u4E0B\u6765\u56DE\u5F52\u6B63\u9898\u3002\u6CE8\u610F\uFF0C\u6211\u4EEC\u8FD9\u91CC\u53EA\u5217\u4E3E\uFF0C\u4E0D\u4F5C\u8FC7\u591A\u8BC4\u8BBA\uFF0C\u4E14\u6392\u540D\u4E0D\u5206\u5148\u540E\uFF0C\u603B\u7ED3\u5F97\u4E0D\u4E00\u5B9A\u5B8C\u5168\u51C6\u786E\uFF0C\u5C0F\u4F19\u4F34\u4EEC\u6709\u8865\u5145\u7684\u53EF\u4EE5\u7559\u8A00\uFF0C\u4F17\u4EBA\u62FE\u67F4\u706B\u7130\u9AD8\u561B\u3002</p><p>\u90FD\u8BF4\u6210\u90FD\u7684\u4E92\u8054\u7F51\u6C1B\u56F4\u76F8\u5F53\u6D53\u539A\uFF0C\u63A5\u4E0B\u6765\u76F4\u63A5\u4E0A\u83DC\u770B\u770B\u5427\uFF01</p><blockquote><p>\u6CE8\uFF1A\u672C\u6587\u7279\u522B\u9E23\u8C22\u6635\u79F0\u300Csky\u5C0F\u55B5\u300D\u7684\u6210\u90FD\u5C0F\u4F19\u4F34\u63D0\u4F9B\u7684\u6574\u7406\u548C\u5E2E\u52A9\u3002</p></blockquote><hr><h2 id="\u534E\u4E3A\u6210\u7814\u6240" tabindex="-1"><a class="header-anchor" href="#\u534E\u4E3A\u6210\u7814\u6240" aria-hidden="true">#</a> \u534E\u4E3A\u6210\u7814\u6240</h2><ul><li>\u7C7B\u578B\uFF1A\u901A\u4FE1\u8BBE\u5907\u5546</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u90EB\u90FD\u533A\u897F\u6E90\u5927\u9053\u6210\u90FD\u534E\u4E3A\u7814\u7A76\u6240</li><li>\u7F51\u5740\uFF1Ahttps://career.huawei.com/</li></ul><hr><h2 id="\u817E\u8BAF\u6210\u90FD\u7814\u53D1\u4E2D\u5FC3" tabindex="-1"><a class="header-anchor" href="#\u817E\u8BAF\u6210\u90FD\u7814\u53D1\u4E2D\u5FC3" aria-hidden="true">#</a> \u817E\u8BAF\u6210\u90FD\u7814\u53D1\u4E2D\u5FC3</h2><ul><li>\u7C7B\u578B\uFF1A\u793E\u4EA4\u3001\u4E92\u8054\u7F51</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u6B66\u4FAF\u533A\u5929\u5E9C\u4E09\u8857\u817E\u8BAF\u5927\u53A6</li><li>\u7F51\u5740\uFF1Ahttps://careers.tencent.com/</li></ul><hr><h2 id="\u8682\u8681\u91D1\u670D-\u6210\u90FD" tabindex="-1"><a class="header-anchor" href="#\u8682\u8681\u91D1\u670D-\u6210\u90FD" aria-hidden="true">#</a> \u8682\u8681\u91D1\u670D\uFF08\u6210\u90FD\uFF09</h2><ul><li>\u7C7B\u578B\uFF1A\u7535\u5546\u3001\u4E92\u8054\u7F51</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u6B66\u4FAF\u533A\u8682\u8681C\u7A7A\u95F4</li><li>\u7F51\u5740\uFF1Ahttps://campus.alibaba.com/</li></ul><hr><h2 id="\u5B57\u8282\u8DF3\u52A8\u6210\u90FD\u7814\u53D1\u4E2D\u5FC3" tabindex="-1"><a class="header-anchor" href="#\u5B57\u8282\u8DF3\u52A8\u6210\u90FD\u7814\u53D1\u4E2D\u5FC3" aria-hidden="true">#</a> \u5B57\u8282\u8DF3\u52A8\u6210\u90FD\u7814\u53D1\u4E2D\u5FC3</h2><ul><li>\u7C7B\u578B\uFF1A\u4E92\u8054\u7F51</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u6B66\u4FAF\u533AOCG\u56FD\u9645\u4E2D\u5FC3</li><li>\u7F51\u5740\uFF1Ahttps://jobs.bytedance.com/</li></ul><hr><h2 id="\u7F8E\u56E2\u6210\u90FD\u7814\u53D1\u4E2D\u5FC3" tabindex="-1"><a class="header-anchor" href="#\u7F8E\u56E2\u6210\u90FD\u7814\u53D1\u4E2D\u5FC3" aria-hidden="true">#</a> \u7F8E\u56E2\u6210\u90FD\u7814\u53D1\u4E2D\u5FC3</h2><ul><li>\u7C7B\u578B\uFF1A\u4E92\u8054\u7F51</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u5929\u5E9C\u4E00\u8857\u4E24\u6C5F\u56FD\u9645A\u5EA7</li><li>\u7F51\u5740\uFF1Ahttps://campus.meituan.com/</li></ul><hr><h2 id="\u6EF4\u6EF4\u6210\u90FD\u7814\u53D1\u4E2D\u5FC3" tabindex="-1"><a class="header-anchor" href="#\u6EF4\u6EF4\u6210\u90FD\u7814\u53D1\u4E2D\u5FC3" aria-hidden="true">#</a> \u6EF4\u6EF4\u6210\u90FD\u7814\u53D1\u4E2D\u5FC3</h2><ul><li>\u7C7B\u578B\uFF1A\u51FA\u884C\u3001\u4E92\u8054\u7F51</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u9526\u6C5F\u533A\u5929\u5E9C\u56FD\u9645\u5927\u53A6</li><li>\u7F51\u5740\uFF1Ahttps://talent.didiglobal.com/</li></ul><hr><h2 id="\u65B0\u6D6A\u5FAE\u535A\u6210\u90FD\u7814\u53D1\u4E2D\u5FC3" tabindex="-1"><a class="header-anchor" href="#\u65B0\u6D6A\u5FAE\u535A\u6210\u90FD\u7814\u53D1\u4E2D\u5FC3" aria-hidden="true">#</a> \u65B0\u6D6A\u5FAE\u535A\u6210\u90FD\u7814\u53D1\u4E2D\u5FC3</h2><ul><li>\u7C7B\u578B\uFF1A\u4E92\u8054\u7F51</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u6B66\u4FAF\u533A\u5929\u5E9C\u8F6F\u4EF6\u56EDC\u533A</li><li>\u7F51\u5740\uFF1Ahttps://career.sina.com.cn/</li></ul><hr><h2 id="\u4E2D\u5174\u6210\u90FD\u7814\u53D1\u4E2D\u5FC3" tabindex="-1"><a class="header-anchor" href="#\u4E2D\u5174\u6210\u90FD\u7814\u53D1\u4E2D\u5FC3" aria-hidden="true">#</a> \u4E2D\u5174\u6210\u90FD\u7814\u53D1\u4E2D\u5FC3</h2><ul><li>\u7C7B\u578B\uFF1A\u901A\u4FE1\u8BBE\u5907\u5546</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u6B66\u4FAF\u533A\u4E2D\u5174\u901A\u8BAF\u5927\u53A6</li><li>\u7F51\u5740\uFF1Ahttp://job.zte.com.cn/</li></ul><hr><h2 id="oppo-\u6210\u90FD" tabindex="-1"><a class="header-anchor" href="#oppo-\u6210\u90FD" aria-hidden="true">#</a> OPPO\uFF08\u6210\u90FD\uFF09</h2><ul><li>\u7C7B\u578B\uFF1A\u901A\u4FE1\u3001\u786C\u4EF6\u3001\u79FB\u52A8\u4E92\u8054\u7F51</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u6B66\u4FAF\u533AOCG\u56FD\u9645\u4E2D\u5FC3</li><li>\u7F51\u5740\uFF1Ahttp://oppo.zhaopin.com/</li></ul><hr><h2 id="\u7231\u5947\u827A-\u6210\u90FD" tabindex="-1"><a class="header-anchor" href="#\u7231\u5947\u827A-\u6210\u90FD" aria-hidden="true">#</a> \u7231\u5947\u827A\uFF08\u6210\u90FD\uFF09</h2><ul><li>\u7C7B\u578B\uFF1A\u89C6\u9891\u3001\u4E92\u8054\u7F51</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u6B66\u4FAF\u533A\u5929\u5E9C\u8F6F\u4EF6\u56EDE\u533A</li><li>\u7F51\u5740\uFF1Ahttps://careers.iqiyi.com/</li></ul><hr><h2 id="\u643A\u7A0B\u6210\u90FD\u7814\u53D1\u4E2D\u5FC3" tabindex="-1"><a class="header-anchor" href="#\u643A\u7A0B\u6210\u90FD\u7814\u53D1\u4E2D\u5FC3" aria-hidden="true">#</a> \u643A\u7A0B\u6210\u90FD\u7814\u53D1\u4E2D\u5FC3</h2><ul><li>\u7C7B\u578B\uFF1A\u4E92\u8054\u7F51</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u6B66\u4FAF\u533A\u5929\u5E9C\u56DB\u8857\u643A\u7A0B\u5927\u53A6</li><li>\u7F51\u5740\uFF1Ahttps://careers.ctrip.com/index.html#/</li></ul><hr><h2 id="\u5546\u6C64\u79D1\u6280-\u6210\u90FD" tabindex="-1"><a class="header-anchor" href="#\u5546\u6C64\u79D1\u6280-\u6210\u90FD" aria-hidden="true">#</a> \u5546\u6C64\u79D1\u6280\uFF08\u6210\u90FD\uFF09</h2><ul><li>\u7C7B\u578B\uFF1A\u4EBA\u5DE5\u667A\u80FD</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u5929\u5E9C\u65B0\u533A\u5929\u5E9C\u7B90\u5BB9\u4E2D\u5FC3</li><li>\u7F51\u5740\uFF1Ahttps://www.sensetime.com/cn/join-index</li></ul><hr><h2 id="\u4EAC\u4E1C\u6210\u90FD\u7814\u53D1\u4E2D\u5FC3" tabindex="-1"><a class="header-anchor" href="#\u4EAC\u4E1C\u6210\u90FD\u7814\u53D1\u4E2D\u5FC3" aria-hidden="true">#</a> \u4EAC\u4E1C\u6210\u90FD\u7814\u53D1\u4E2D\u5FC3</h2><ul><li>\u7C7B\u578B\uFF1A\u7535\u5546\u3001\u4E92\u8054\u7F51</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u6B66\u4FAF\u533A\u6B66\u5174\u4E09\u8DEF\u897F\u90E8\u667A\u8C37D\u533A</li><li>\u7F51\u5740\uFF1Ahttps://about.jd.com/zhaopin/</li></ul><hr><h2 id="\u79D1\u5927\u8BAF\u98DE-\u6210\u90FD" tabindex="-1"><a class="header-anchor" href="#\u79D1\u5927\u8BAF\u98DE-\u6210\u90FD" aria-hidden="true">#</a> \u79D1\u5927\u8BAF\u98DE\uFF08\u6210\u90FD\uFF09</h2><ul><li>\u7C7B\u578B\uFF1A\u4EBA\u5DE5\u667A\u80FD\u3001\u6570\u636E\u670D\u52A1</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u5929\u5E9C\u65B0\u533A\u83C1\u84C9\u4E2D\u5FC3A\u533A</li><li>\u7F51\u5740\uFF1Ahttps://candidate.iflytek.com/</li></ul><hr><h2 id="thoughtworks-\u6210\u90FD" tabindex="-1"><a class="header-anchor" href="#thoughtworks-\u6210\u90FD" aria-hidden="true">#</a> ThoughtWorks\uFF08\u6210\u90FD\uFF09</h2><ul><li>\u7C7B\u578B\uFF1A\u4F01\u4E1A\u670D\u52A1\u3001\u4FE1\u606F\u5B89\u5168</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u6B66\u4FAF\u533A\u5929\u5E9C\u8F6F\u4EF6\u56EDE\u533A</li><li>\u7F51\u5740\uFF1Ahttps://www.thoughtworks.com</li></ul><hr><h2 id="garmin\u4F73\u660E" tabindex="-1"><a class="header-anchor" href="#garmin\u4F73\u660E" aria-hidden="true">#</a> GARMIN\u4F73\u660E</h2><ul><li>\u7C7B\u578B\uFF1A\u901A\u8BAF\u7535\u5B50\uFF0C\u667A\u80FD\u786C\u4EF6</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u6B66\u4FAF\u533A\u5929\u5E9C\u8F6F\u4EF6\u56EDC\u533A</li><li>\u7F51\u5740\uFF1Ahttps://www.garmin.com.cn/job/</li></ul><hr><h2 id="\u6781\u7C73\u79D1\u6280" tabindex="-1"><a class="header-anchor" href="#\u6781\u7C73\u79D1\u6280" aria-hidden="true">#</a> \u6781\u7C73\u79D1\u6280</h2><ul><li>\u7C7B\u578B\uFF1A\u786C\u4EF6\u3001\u7535\u5546</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u6B66\u4FAF\u533A\u5929\u5E9C\u8F6F\u4EF6\u56EDA\u533A</li><li>\u7F51\u5740\uFF1Ahttps://www.xgimi.com/</li></ul><hr><h2 id="\u805A\u7F8E\u4F18\u54C1" tabindex="-1"><a class="header-anchor" href="#\u805A\u7F8E\u4F18\u54C1" aria-hidden="true">#</a> \u805A\u7F8E\u4F18\u54C1</h2><ul><li>\u7C7B\u578B\uFF1A\u7535\u5546</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u6B66\u4FAF\u533A\u5929\u5E9C\u8F6F\u4EF6\u56EDG\u533A</li><li>\u7F51\u5740\uFF1Ahttp://www.jumei.com</li></ul><hr><h2 id="\u9524\u5B50\u79D1\u6280-\u5FFD\u7565" tabindex="-1"><a class="header-anchor" href="#\u9524\u5B50\u79D1\u6280-\u5FFD\u7565" aria-hidden="true">#</a> \u9524\u5B50\u79D1\u6280\uFF08\u5FFD\u7565\uFF09</h2><ul><li>\u7C7B\u578B\uFF1A\u786C\u4EF6\u3001\u79FB\u52A8\u4E92\u8054\u7F51</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u6210\u534E\u533A\u9F99\u6F6D\u5DE5\u4E1A\u56ED</li><li>\u7F51\u5740\uFF1Ahttps://www.smartisan.com/support/#/join</li></ul><hr><h2 id="\u5B8C\u7F8E\u4E16\u754C-\u6210\u90FD" tabindex="-1"><a class="header-anchor" href="#\u5B8C\u7F8E\u4E16\u754C-\u6210\u90FD" aria-hidden="true">#</a> \u5B8C\u7F8E\u4E16\u754C\uFF08\u6210\u90FD\uFF09</h2><ul><li>\u7C7B\u578B\uFF1A\u6E38\u620F\u3001\u79FB\u52A8\u4E92\u8054\u7F51</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u6B66\u4FAF\u533A\u5929\u5E9C\u8F6F\u4EF6\u56EDC\u533A\u5B8C\u7F8E\u4E16\u754C\u5927\u697C</li><li>\u7F51\u5740\uFF1Ahttp://jobs.wanmei.com/</li></ul><hr><h2 id="\u591A\u76CA\u7F51\u7EDC-\u6210\u90FD" tabindex="-1"><a class="header-anchor" href="#\u591A\u76CA\u7F51\u7EDC-\u6210\u90FD" aria-hidden="true">#</a> \u591A\u76CA\u7F51\u7EDC\uFF08\u6210\u90FD\uFF09</h2><ul><li>\u7C7B\u578B\uFF1A\u6E38\u620F\u3001\u79FB\u52A8\u4E92\u8054\u7F51</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u6B66\u4FAF\u533A\u5929\u5E9C\u8F6F\u4EF6\u56EDG\u533A</li><li>\u7F51\u5740\uFF1Ahttps://xz.duoyi.com/</li></ul><hr><h2 id="\u5F53\u4E50\u7F51" tabindex="-1"><a class="header-anchor" href="#\u5F53\u4E50\u7F51" aria-hidden="true">#</a> \u5F53\u4E50\u7F51</h2><ul><li>\u7C7B\u578B\uFF1A\u6E38\u620F\u3001\u79FB\u52A8\u4E92\u8054\u7F51</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u9AD8\u65B0\u533A\u5929\u5E9C\u8F6F\u4EF6\u56EDE\u533A1\u53F7\u697C</li><li>\u7F51\u5740\uFF1Ahttps://www.d.cn/hr/</li></ul><hr><h2 id="\u5B9E\u4E60\u50E7" tabindex="-1"><a class="header-anchor" href="#\u5B9E\u4E60\u50E7" aria-hidden="true">#</a> \u5B9E\u4E60\u50E7</h2><ul><li>\u7C7B\u578B\uFF1A\u62DB\u8058\u3001\u4F01\u4E1A\u670D\u52A1</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u6B66\u4FAF\u533A\u5929\u5E9C\u4E94\u8857\u8F6F\u4EF6\u56EDG\u533A7\u680B</li><li>\u7F51\u5740\uFF1Ahttps://www.shixiseng.com/tc/normal/mx2021</li></ul><hr><h2 id="\u8FC5\u6E38\u7F51\u7EDC" tabindex="-1"><a class="header-anchor" href="#\u8FC5\u6E38\u7F51\u7EDC" aria-hidden="true">#</a> \u8FC5\u6E38\u7F51\u7EDC</h2><ul><li>\u7C7B\u578B\uFF1A\u6E38\u620F</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u6B66\u4FAF\u533A\u5929\u5E9C\u8F6F\u4EF6\u56EDD\u533A</li><li>\u7F51\u5740\uFF1Ahttp://www.xunyou.com/hr/</li></ul><hr><h2 id="\u8DA3\u4E50\u591A" tabindex="-1"><a class="header-anchor" href="#\u8DA3\u4E50\u591A" aria-hidden="true">#</a> \u8DA3\u4E50\u591A</h2><ul><li>\u7C7B\u578B\uFF1A\u6E38\u620F</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u6B66\u4FAF\u533A\u5929\u5E9C\u8F6F\u4EF6\u56EDC\u533A</li></ul><hr><h2 id="\u7406\u60F3\u5883\u754C" tabindex="-1"><a class="header-anchor" href="#\u7406\u60F3\u5883\u754C" aria-hidden="true">#</a> \u7406\u60F3\u5883\u754C</h2><ul><li>\u7C7B\u578B\uFF1A\u667A\u80FD\u786C\u4EF6\u3001\u663E\u793A\u6280\u672F</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u6B66\u4FAF\u533A\u5929\u5E9C\u8F6F\u4EF6\u56EDA\u533A</li><li>\u7F51\u5740\uFF1Ahttp://www.idealsee.com/home</li></ul><hr><h2 id="\u5495-\u549A" tabindex="-1"><a class="header-anchor" href="#\u5495-\u549A" aria-hidden="true">#</a> \u5495 \u549A</h2><ul><li>\u7C7B\u578B\uFF1A\u79FB\u52A8\u4E92\u8054\u7F51</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u6B66\u4FAF\u533A\u5929\u5E9C\u8F6F\u4EF6\u56EDD\u533A</li><li>\u7F51\u5740\uFF1Ahttps://www.codoon.com/</li></ul><hr><h2 id="\u767E\u8BCD\u65A9" tabindex="-1"><a class="header-anchor" href="#\u767E\u8BCD\u65A9" aria-hidden="true">#</a> \u767E\u8BCD\u65A9</h2><ul><li>\u7C7B\u578B\uFF1A\u6559\u80B2\u3001\u79FB\u52A8\u4E92\u8054\u7F51</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u6B66\u4FAF\u533A\u5929\u5E9C\u4E94\u8857\u5929\u5E9C\u8F6F\u4EF6\u56EDE\u533A</li><li>\u7F51\u5740\uFF1Ahttp://www.baicizhan.com/</li></ul><hr><h2 id="\u9C81\u5927\u5E08" tabindex="-1"><a class="header-anchor" href="#\u9C81\u5927\u5E08" aria-hidden="true">#</a> \u9C81\u5927\u5E08</h2><ul><li>\u7C7B\u578B\uFF1A\u5DE5\u5177\u3001\u79FB\u52A8\u4E92\u8054\u7F51</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u6B66\u4FAF\u533A\u5929\u5E9C\u8F6F\u4EF6\u56EDE\u533A</li><li>\u7F51\u5740\uFF1Ahttps://www.ludashi.com/</li></ul><hr><h2 id="\u4F18\u5BA2\u9038\u5BB6" tabindex="-1"><a class="header-anchor" href="#\u4F18\u5BA2\u9038\u5BB6" aria-hidden="true">#</a> \u4F18\u5BA2\u9038\u5BB6</h2><ul><li>\u7C7B\u578B\uFF1A\u79DF\u623F\u3001\u79FB\u52A8\u4E92\u8054\u7F51</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u6B66\u4FAF\u533A\u65E0\u56FD\u754C26\u680B</li><li>\u7F51\u5740\uFF1Ahttp://www.uoko.com/</li></ul><hr><h2 id="testbird" tabindex="-1"><a class="header-anchor" href="#testbird" aria-hidden="true">#</a> TestBird</h2><ul><li>\u7C7B\u578B\uFF1A\u4F01\u4E1A\u670D\u52A1\u3001\u79FB\u52A8\u4E92\u8054\u7F51</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u6B66\u4FAF\u533A\u5929\u5E9C\u8F6F\u4EF6\u56EDC\u533A</li><li>\u7F51\u5740\uFF1Ahttps://www.testbird.com/</li></ul><hr><h2 id="\u5B9E\u9A8C\u697C" tabindex="-1"><a class="header-anchor" href="#\u5B9E\u9A8C\u697C" aria-hidden="true">#</a> \u5B9E\u9A8C\u697C</h2><ul><li>\u7C7B\u578B\uFF1A\u5728\u7EBF\u6559\u80B2</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u6B66\u4FAF\u533A\u5929\u5E9C\u8F6F\u4EF6\u56EDE\u533A</li><li>\u7F51\u5740\uFF1Ahttp://www.shiyanlou.com</li></ul><hr><h2 id="\u897F\u74DC\u521B\u5BA2" tabindex="-1"><a class="header-anchor" href="#\u897F\u74DC\u521B\u5BA2" aria-hidden="true">#</a> \u897F\u74DC\u521B\u5BA2</h2><ul><li>\u7C7B\u578B\uFF1A\u6559\u80B2\u3001\u5C11\u513F\u7F16\u7A0B</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u6B66\u4FAF\u533AOCG\u56FD\u9645\u4E2D\u5FC3A\u5EA7</li><li>\u7F51\u5740\uFF1Ahttps://www.xiguacity.cn/</li></ul><hr><h2 id="\u533B\u8054" tabindex="-1"><a class="header-anchor" href="#\u533B\u8054" aria-hidden="true">#</a> \u533B\u8054</h2><ul><li>\u7C7B\u578B\uFF1A\u533B\u7597\u3001\u79FB\u52A8\u4E92\u8054\u7F51</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u6B66\u4FAF\u533A\u5929\u5E9C\u8F6F\u4EF6\u56EDB\u533A</li><li>\u7F51\u5740\uFF1Ahttps://www.medlinker.com/join/hr</li></ul><hr><h2 id="camera360" tabindex="-1"><a class="header-anchor" href="#camera360" aria-hidden="true">#</a> Camera360</h2><ul><li>\u7C7B\u578B\uFF1A\u79FB\u52A8\u5F71\u50CF</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u9AD8\u65B0\u533A\u5929\u5E9C\u8F6F\u4EF6\u56EDE\u533A</li><li>\u7F51\u5740\uFF1Ahttp://hr.camera360.com/</li></ul><hr><h2 id="\u5C0F\u9E21\u53EB\u53EB" tabindex="-1"><a class="header-anchor" href="#\u5C0F\u9E21\u53EB\u53EB" aria-hidden="true">#</a> \u5C0F\u9E21\u53EB\u53EB</h2><ul><li>\u7C7B\u578B\uFF1A\u5728\u7EBF\u6559\u80B2\u3001\u79FB\u52A8\u4E92\u8054\u7F51</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u6B66\u4FAF\u533A\u7687\u5EAD\u56FD\u9645A\u5EA7</li><li>\u7F51\u5740\uFF1Ahttps://www.jojoreading.com/</li></ul><hr><h2 id="\u6479\u5BA2" tabindex="-1"><a class="header-anchor" href="#\u6479\u5BA2" aria-hidden="true">#</a> \u6479\u5BA2</h2><ul><li>\u7C7B\u578B\uFF1A\u5DE5\u5177\u3001\u79FB\u52A8\u4E92\u8054\u7F51</li><li>\u4EE3\u8868\u4EA7\u54C1\uFF1AMockplus\u3001\u6479\u5BA2</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u53CC\u6D41\u533A\u53CC\u5174\u5927\u90531\u53F7\u7535\u5B50\u79D1\u6280\u56ED16\u680B</li><li>\u7F51\u5740\uFF1Ahttps://www.mockplus.cn/</li></ul><hr><h2 id="\u7F8E\u6D3D\u79D1\u6280" tabindex="-1"><a class="header-anchor" href="#\u7F8E\u6D3D\u79D1\u6280" aria-hidden="true">#</a> \u7F8E\u6D3D\u79D1\u6280</h2><ul><li>\u7C7B\u578B\uFF1A\u667A\u80FD\u5BA2\u670D\u3001\u4F01\u4E1A\u670D\u52A1</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u6B66\u4FAF\u533A\u5E0C\u987F\u56FD\u9645B\u5EA7</li><li>\u7F51\u5740\uFF1Ahttps://meiqia.com/about#joinus</li></ul><hr><h2 id="tap4fun" tabindex="-1"><a class="header-anchor" href="#tap4fun" aria-hidden="true">#</a> tap4fun</h2><ul><li>\u7C7B\u578B\uFF1A\u6E38\u620F\u3001\u624B\u6E38</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u6B66\u4FAF\u533A\u5929\u5E9C\u8F6F\u4EF6\u56EDA\u533A</li><li>\u7F51\u5740\uFF1Ahttps://www.tap4fun.com/</li></ul><hr><h2 id="\u77E5\u9053\u521B\u5B87" tabindex="-1"><a class="header-anchor" href="#\u77E5\u9053\u521B\u5B87" aria-hidden="true">#</a> \u77E5\u9053\u521B\u5B87</h2><ul><li>\u7C7B\u578B\uFF1A\u4FE1\u606F\u5B89\u5168</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u6B66\u4FAF\u533A\u817E\u8BAF\u5927\u53A6B\u5EA7</li><li>\u7F51\u5740\uFF1Ahttps://www.knownsec.com/#/jobs</li></ul><hr><h2 id="\u68A6\u5DE5\u5382" tabindex="-1"><a class="header-anchor" href="#\u68A6\u5DE5\u5382" aria-hidden="true">#</a> \u68A6\u5DE5\u5382</h2><ul><li>\u7C7B\u578B\uFF1A\u6E38\u620F</li><li>\u5730\u5740\uFF1A\u6210\u90FD\u5E02\u9526\u6C5F\u533A\u4E09\u8272\u8DEF38\u53F7\u535A\u745E\u521B\u610F\u6210\u90FD</li><li>\u7F51\u5740\uFF1Ahttp://www.dreamwork.cn/join.html</li></ul><hr><h2 id="\u5176\u4ED6" tabindex="-1"><a class="header-anchor" href="#\u5176\u4ED6" aria-hidden="true">#</a> \u5176\u4ED6</h2><ul><li><p>\u79FB\u82B1\u4E92\u52A8</p></li><li><p>\u76DB\u5927</p></li><li><p>\u62B9\u8336\u7F8E\u5986</p></li><li><p>\u54AA\u5495\u97F3\u4E50</p></li><li><p>\u901F\u9012\u6613</p></li><li><p>Tower</p></li><li><p>\u5BA2\u5982\u4E91</p></li><li><p>\u756A\u8304\u6765\u4E86</p></li><li><p>\u4E09\u4E03\u4E92\u5A31</p></li><li><p>\u7406\u60F3\u751F\u6D3B\u5B9E\u9A8C\u5BA4</p></li><li><p>\u9C7C\u8BF4\u79D1\u6280</p></li><li><p>\u94C1\u76AE\u4EBA\u79D1\u6280</p></li><li><p>\u5C0F\u5A31wifi</p></li><li><p>\u6781\u4F01</p></li><li><p>\u8D27\u8F66\u5E2E</p></li><li><p>\u9EA6\u9EA6\u517B\u8001</p></li><li><p>\u6D3B\u52A8\u5BB6</p></li><li><p>\u6742\u5FD7\u94FA</p></li><li><p>\u9EA6\u5BA2</p></li><li><p>\u6587\u8F69\u7F51</p></li><li><p>...\u7B49\u7B49</p></li></ul><hr><p>\u6700\u540E\uFF0C\u7531\u4E8E\u4E86\u89E3\u6709\u9650\uFF0C\u96BE\u514D\u4F1A\u6709\u758F\u6F0F\u548C\u4E0D\u5F53\uFF0C\u5C0F\u4F19\u4F34\u4EEC\u53EF\u4EE5\u7559\u8A00\u8865\u5145\uFF0C\u4F17\u4EBA\u62FE\u67F4\u706B\u7130\u9AD8\uFF01</p>',134),o=l("\u94FE\u63A5\uFF1A"),u={href:"https://mp.weixin.qq.com/s/eaX9QhLwy_VsGIH0apA4qw",target:"_blank",rel:"noopener noreferrer"},p=l("https://mp.weixin.qq.com/s/eaX9QhLwy_VsGIH0apA4qw"),w=i("p",null,[i("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png",alt:""})],-1);function m(b,x){const a=e("ExternalLinkIcon");return r(),t("div",null,[s,i("blockquote",null,[i("p",null,[o,i("a",u,[p,d(a)])])]),w])}var g=h(c,[["render",m],["__file","chengdu.html.vue"]]);export{g as default};
diff --git a/dist/assets/chengdu.html.c9264a1d.js b/dist/assets/chengdu.html.c9264a1d.js
new file mode 100644
index 00000000..683ecc3b
--- /dev/null
+++ b/dist/assets/chengdu.html.c9264a1d.js
@@ -0,0 +1 @@
+const e={key:"v-38cd1384",path:"/cityselect/chengdu.html",title:"\u6210\u90FD\u90FD\u6709\u54EA\u4E9B\u503C\u5F97\u52A0\u5165\u7684IT\u4E92\u8054\u7F51\u516C\u53F8\uFF1F",lang:"zh-CN",frontmatter:{shortTitle:"\u6210\u90FD",category:["\u6C42\u804C\u9762\u8BD5"],tag:["\u57CE\u5E02\u9009\u62E9"],summary:"\u6210\u90FD\u90FD\u6709\u54EA\u4E9B\u503C\u5F97\u52A0\u5165\u7684IT\u4E92\u8054\u7F51\u516C\u53F8\uFF1F \u4ECA\u5929\u5E94\u5C0F\u4F19\u4F34\u4EEC\u7684\u8981\u6C42\uFF0C\u518D\u6765\u804A\u4E00\u804A\u7F8E\u4E3D\u7684\u56DB\u5DDD\u7701\u6210\u90FD\u5E02\u6709\u54EA\u4E9B\u9177\u9177\u7684IT/\u6280\u672F\u7C7B\u516C\u53F8\uFF08\u4E0D\u4EC5\u4EC5\u5C40\u9650\u4E8E\u7EAF\u4E92\u8054\u7F51\uFF09\u3002 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\u549A",slug:"\u5495-\u549A",children:[]},{level:2,title:"\u767E\u8BCD\u65A9",slug:"\u767E\u8BCD\u65A9",children:[]},{level:2,title:"\u9C81\u5927\u5E08",slug:"\u9C81\u5927\u5E08",children:[]},{level:2,title:"\u4F18\u5BA2\u9038\u5BB6",slug:"\u4F18\u5BA2\u9038\u5BB6",children:[]},{level:2,title:"TestBird",slug:"testbird",children:[]},{level:2,title:"\u5B9E\u9A8C\u697C",slug:"\u5B9E\u9A8C\u697C",children:[]},{level:2,title:"\u897F\u74DC\u521B\u5BA2",slug:"\u897F\u74DC\u521B\u5BA2",children:[]},{level:2,title:"\u533B\u8054",slug:"\u533B\u8054",children:[]},{level:2,title:"Camera360",slug:"camera360",children:[]},{level:2,title:"\u5C0F\u9E21\u53EB\u53EB",slug:"\u5C0F\u9E21\u53EB\u53EB",children:[]},{level:2,title:"\u6479\u5BA2",slug:"\u6479\u5BA2",children:[]},{level:2,title:"\u7F8E\u6D3D\u79D1\u6280",slug:"\u7F8E\u6D3D\u79D1\u6280",children:[]},{level:2,title:"tap4fun",slug:"tap4fun",children:[]},{level:2,title:"\u77E5\u9053\u521B\u5B87",slug:"\u77E5\u9053\u521B\u5B87",children:[]},{level:2,title:"\u68A6\u5DE5\u5382",slug:"\u68A6\u5DE5\u5382",children:[]},{level:2,title:"\u5176\u4ED6",slug:"\u5176\u4ED6",children:[]}],git:{createdTime:164837021e4,updatedTime:1654949748e3,contributors:[{name:"itwanger",email:"www.qing_gee@163.com",commits:3}]},readingTime:{minutes:5.82,words:1746},filePathRelative:"cityselect/chengdu.md"};export{e as data};
diff --git a/dist/assets/chengxuyuannv-chonghui-java.html.b2dd4108.js b/dist/assets/chengxuyuannv-chonghui-java.html.01f1b5cf.js
similarity index 98%
rename from dist/assets/chengxuyuannv-chonghui-java.html.b2dd4108.js
rename to dist/assets/chengxuyuannv-chonghui-java.html.01f1b5cf.js
index 2dc94f11..75a602af 100644
--- a/dist/assets/chengxuyuannv-chonghui-java.html.b2dd4108.js
+++ b/dist/assets/chengxuyuannv-chonghui-java.html.01f1b5cf.js
@@ -1 +1 @@
-import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{r as o,o as r,c,a as e,b as s,e as t,d as a}from"./app.a0271b9c.js";const i={},h=t('<p>\u5927\u5BB6\u597D\uFF0C\u6211\u662F\u4E8C\u54E5\u5440\uFF01\u524D\u51E0\u5929\u4E00\u4E2A91\u5E74\u7684\u5C0F\u59D0\u59D0\u7ED9\u6211\u53D1\u79C1\u4FE1\u8BF4\uFF0C\u597919\u5E74\u56DE\u8001\u5BB6\u521B\u4E1A\u5F00\u4E86\u4E2A\u5B9E\u4F53\u5E97\u505A\u5EFA\u6750\u751F\u610F\uFF0C\u4F46\u53D7\u56F0\u4E8E\u75AB\u60C5\uFF0C\u751F\u610F\u8D8A\u6765\u8D8A\u4E0D\u597D\u505A\uFF0C<strong>\u4E8E\u662F\u5C31\u840C\u751F\u91CD\u56DE\u8F6F\u4EF6\u5F00\u53D1 base \u6B66\u6C49</strong>\u7684\u60F3\u6CD5\uFF0C\u95EE\u6211\u6709\u4EC0\u4E48\u5EFA\u8BAE\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/chengxuyuannv-chonghui-java-1.png" alt=""></p><p>\u521A\u597D\u4ECA\u5929\u6709\u7A7A\uFF0C\u5C31\u627E\u5979\u597D\u597D\u804A\u4E86\u4E00\u4E0B\uFF0C\u7ED9\u4E86\u5979\u4E00\u4E9B\u5EFA\u8BAE\uFF0C\u540C\u65F6\u4E5F\u7ED9\u4E86\u4E00\u4E9B\u6211\u6700\u8FD1\u6574\u7406\u7684\u5B66\u4E60\u8D44\u6599\u3002\u5C0F\u59D0\u59D0\u8BF4\u5979\u4F1A\u4ED4\u7EC6\u5B66\u4E60\u7684\uFF0C\u90A3\u4EFD\u51B3\u5FC3\u7ED9\u6211\u7684\u89E6\u52A8\u5F88\u5927\uFF0C\u6240\u4EE5\u6211\u6253\u7B97\u518D\u6765\u5199\u4E00\u7BC7\u6587\u7AE0\u5E2E\u5979\u6DF1\u5165\u5730\u5206\u6790\u4E00\u4E0B\uFF0C\u540C\u65F6\u4E5F\u5E0C\u671B\u7ED9\u6709\u540C\u6837\u56F0\u60D1\u7684\u5C0F\u4F19\u4F34\u4E00\u70B9\u70B9\u542F\u53D1\u548C\u5E2E\u52A9~</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/chengxuyuannv-chonghui-java-2.png" alt=""></p><h3 id="\u4E00\u3001\u4E0D\u670D\u4E0D\u884C" tabindex="-1"><a class="header-anchor" href="#\u4E00\u3001\u4E0D\u670D\u4E0D\u884C" aria-hidden="true">#</a> \u4E00\u3001\u4E0D\u670D\u4E0D\u884C</h3><p>\u8BF4\u771F\u7684\uFF0C\u6211\u633A\u4F69\u670D\u8FD9\u4F4D\u5C0F\u59D0\u59D0\u7684\u3002\u5979 14 \u5E74\u672C\u79D1\u6BD5\u4E1A\uFF0C\u5728\u6DF1\u5733\u5DE5\u4F5C\u4E86 3 \u5E74\uFF0C\u505A Web 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14 \u5E74\u5F00\u59CB\u575A\u6301\u5199\u4F5C\uFF0C\u8FD9\u4E00\u575A\u6301\uFF0C\u5C31\u575A\u6301\u4E86 8 \u5E74\uFF0C\u5C31\u4E0D\u4EAE\u6211\u7684\u90A3\u4E9B\u6210\u7EE9\u4E86\uFF0C\u5355\u51ED\u575A\u6301\u8FD9\u4E00\u6761\uFF0C\u6211\u89C9\u5F97\u81EA\u5DF1\u5C31\u591F\u5F97\u4E0A\u201C\u50BB\u903C\u201D\u8FD9\u79F0\u53F7\uFF0C\u554A\uFF0C\u4E0D\uFF0C\u201C\u725B\u903C\u201D\u7684\u79F0\u53F7\uFF0C\u54C8\u54C8\u54C8\u3002</p><p>\u4E00\u8DEF\u8D70\u6765\uFF0C\u6211\u89C1\u8BC1\u4E86\u592A\u591A\u653E\u5F03\u7684\u4EBA\uFF0C\u5305\u62EC\u90A3\u4E2A\u5DEE\u4E00\u70B9\u7684\u81EA\u5DF1\u3002\u653E\u5F03\u7684\u65F6\u5019\uFF0C\u5C31\u62C9\u81EA\u5DF1\u4E00\u628A\u3002</p><h3 id="\u4E8C\u3001\u4E00\u70B9\u5EFA\u8BAE" tabindex="-1"><a class="header-anchor" href="#\u4E8C\u3001\u4E00\u70B9\u5EFA\u8BAE" aria-hidden="true">#</a> \u4E8C\u3001\u4E00\u70B9\u5EFA\u8BAE</h3><p>\u9488\u5BF9\u5C0F\u59D0\u59D0\u7684\u60C5\u51B5\uFF0C\u6700\u91CD\u8981\u7684\u662F\uFF0C\u8981\u60F3\u65B9\u8BBE\u6CD5\u628A\u81EA\u5DF1\u7B80\u5386\u4E0A\u7684\u56DB\u4E94\u5E74\u7A7A\u767D\u671F\u7ED9\u8865\u51FA\u6765\u3002\u6211\u7684\u610F\u601D\u4E0D\u662F\u8BF4\u53BB\u9020\u5047\uFF0C\u800C\u662F\u81EA\u5DF1\u79C1\u5E95\u4E0B\u53BB\u4ED8\u51FA\u6BD4\u522B\u4EBA\u66F4\u591A\u7684\u52AA\u529B\uFF0C\u628A\u8FD9\u6837\u7684\u7A7A\u767D\u671F\u7ED9\u8865\u4E00\u8865\u3002</p><p>\u81F3\u4E8E\u80FD\u8865\u591A\u5C11\uFF0C\u5C31\u5168\u51ED\u81EA\u5DF1\u7684\u52AA\u529B\u7A0B\u5EA6\u4E86\u3002</p><p>\u5C0F\u59D0\u59D0 base \u6B66\u6C49\uFF0C\u90A3\u6211\u4EEC\u5C31\u5230 boss \u76F4\u8058\u4E0A\u770B\u4E00\u4E0B Java \u5C97\u7684\u62DB\u8058\u60C5\u51B5\u54C8\uFF0C\u5C97\u4F4D\u8FD8\u662F\u6BD4\u8F83\u5145\u88D5\u7684\uFF0C3 \u5230 5 \u5E74\u7684\u85AA\u8D44\u5F85\u9047\u5728 15k-25k \u4E4B\u95F4\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/chengxuyuannv-chonghui-java-3.png" alt=""></p><p>\u518D\u6765\u770B\u4E00\u4E0B\u4EFB\u804C\u8981\u6C42\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/chengxuyuannv-chonghui-java-4.png" alt=""></p><p>\u7B2C\u4E00\uFF0C\u7CBE\u901A Java \u8BED\u8A00\uFF0C\u73B0\u5728\u7684\u62DB\u8058\u8981\u6C42\u57FA\u672C\u4E0A\u90FD\u8FD9\u6837\uFF0C\u7CBE\u901A\u662F\u5E38\u6001\u3002\u9488\u5BF9\u8FD9\u79CD\u201C\u65E0\u7406\u201D\u7684\u8981\u6C42\uFF0C\u529E\u6CD5\u53EA\u6709\u4E00\u4E2A\uFF0C\u5C31\u662F\u53BB\u80CC\u516B\u80A1\u6587\uFF01\u5148\u80CC\u4F1A\u518D\u8BF4\u3002\u9762\u8BD5\u5B98\u95EE\u7684\u4F60\u80FD\u7B54\u4E0A\u6765\u5C31\u8868\u660E\u4F60\u662F\u7CBE\u901A\u3002</p><p>\u90A3\u4E8C\u54E5\u7684\u5C0F\u7834\u7AD9\uFF0C<strong>Java \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF</strong>\uFF0C\u57FA\u672C\u4E0A\u628A Java \u7684\u9AD8\u9891\u9762\u8BD5\u9898\u90FD\u8986\u76D6\u4E86\uFF0C\u5305\u62EC Java \u57FA\u7840\u3001Java \u96C6\u5408\u6846\u67B6\u3001Java \u5E76\u53D1\u3001Java \u865A\u62DF\u673A\u7B49\uFF0C\u53BB\u80CC\u5C31\u5BF9\u4E86\u3002</p><blockquote><p>https://tobebetterjavaer.com/</p></blockquote><p>\u7B2C\u4E8C\uFF0C\u719F\u7EC3\u4F7F\u7528 Spring \u5168\u5BB6\u6876\uFF0C\u5305\u62EC Spring Boot \u548C Spring Cloud\uFF0C\u4EE5\u53CA\u5206\u5E03\u5F0F\u3001\u5FAE\u670D\u52A1\u3001\u4E91\u539F\u751F\u7B49\u7B49\u3002</p><p>\u8FD9\u4E2A\u53BB GitHub \u4E0A\u627E\u4E2A\u50CF\u6837\u7684\u7EC3\u624B\u9879\u76EE\u51FA\u6765\u505A\u505A\u5C31\u884C\u4E86\uFF0C\u50CF vhr\u3001mall\u3001miaosha 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\u8BED\u53E5\u7684\u7F16\u5199\uFF0C"),l={href:"https://mp.weixin.qq.com/s/c-sy7tM0BmrqMUQFW7C65g",target:"_blank",rel:"noopener noreferrer"},v=a("\u6628\u5929\u7684\u6587\u7AE0"),d=a("\u6709\u6536\u85CF\u5427\uFF0C\u6309\u7167\u91CC\u9762\u7684\u5185\u5BB9\u53BB\u6D88\u5316\u5C31\u5BF9\u4E86\u3002"),b=t('<p>\u7B2C\u56DB\uFF0C\u5177\u5907\u624E\u5B9E\u7684\u8BA1\u7B97\u673A\u57FA\u7840\u77E5\u8BC6\uFF0C\u5305\u62EC\u64CD\u4F5C\u7CFB\u7EDF\u3001\u8BBE\u8BA1\u6A21\u5F0F\u3001\u6811\u7ED3\u6784\u4E0E\u7B97\u6CD5\u3001\u7F51\u7EDC\u5B89\u5168\u7B49\uFF0C\u8FD9\u65B9\u9762\u7684\u8D44\u6599\u4E5F\u6709\u5F88\u591A\uFF0C\u53EF\u4EE5\u627E\u4E8C\u54E5\u8981\u3002</p><p>\u7B2C\u4E94\uFF0C\u719F\u6089\u5206\u5E03\u5F0F\u548C\u9AD8\u5E76\u53D1\uFF0C\u4E8C\u54E5\u4E4B\u524D\u53D1\u8FC7\u8FD9\u65B9\u9762\u7684\u5C0F\u8BFE\uFF0C\u4E0D\u77E5\u9053\u6709\u591A\u5C11\u5C0F\u4F19\u4F34\u770B\u8FC7\u54C8\u3002</p><p>\u7B2C\u516D\uFF0C\u7EFC\u5408\u7D20\u8D28\uFF0C\u5305\u62EC\u89E3\u51B3\u95EE\u9898\u7684\u80FD\u529B\u3001\u6297\u538B\u80FD\u529B\u3001\u6C9F\u901A\u80FD\u529B\u7B49\u7B49\uFF0C\u5973\u751F\u5728\u6297\u538B\u80FD\u529B\u4E0A\u53EF\u80FD\u5F31\u4E00\u70B9\uFF0C\u4F46\u5728\u6C9F\u901A\u80FD\u529B\u7EDD\u5BF9\u662F\u540A\u6253\u7537\u751F\u3002</p><p>\u81F3\u4E8E\u89E3\u51B3\u95EE\u9898\u7684\u80FD\u529B\uFF0C\u5C31\u9760\u5B9E\u6218\u4E2D\u7684\u79EF\u7D2F\u4E86\uFF0C\u8FD9\u4E2A\u548C\u601D\u7EF4\u3001\u8BA4\u77E5\u3001\u773C\u754C\u7684\u5173\u8054\u6027\u6BD4\u8F83\u5F3A\u3002</p><p>\u4ECE\u8BA4\u77E5\u8981\u6C42\u4E0A\u53EF\u4EE5\u770B\u5F97\u51FA\uFF0C\u5B66\u5386\u662F\u7B2C\u4E00\u4F4D\uFF0C\u7136\u540E\u662F Java \u57FA\u7840\uFF0C\u5176\u6B21\u662F Spring \u5168\u5BB6\u6876\uFF0C\u4E4B\u540E\u662F MySQL\uFF0C\u7136\u540E\u662F\u8BA1\u7B97\u673A\u57FA\u7840\u77E5\u8BC6\uFF0C\u6700\u540E\u662F\u7EFC\u5408\u7D20\u8D28\u3002</p><p>\u7406\u6E05\u695A\u8FD9\u4E2A\uFF0C\u5C31\u77E5\u9053\u5B66\u4E60\u7684\u91CD\u70B9\u4E86\uFF0C\u63A5\u4E0B\u6765\u5C31\u662F\u5377\u3002</p><h3 id="\u4E09\u3001\u5F00\u59CB\u5377\u5427" tabindex="-1"><a class="header-anchor" href="#\u4E09\u3001\u5F00\u59CB\u5377\u5427" aria-hidden="true">#</a> \u4E09\u3001\u5F00\u59CB\u5377\u5427</h3><p>\u8BF4\u53E5\u5B9E\u5728\u8BDD\uFF0C\u5355\u8EAB\u201Csolo\u201D\u7684\u65F6\u5019\u6050\u6015\u662F\u5B66\u4E60\u65F6\u95F4\u6700\u5145\u5206\u7684\uFF1B\u7ED3\u5A5A\u751F\u5B50\u540E\uFF0C\u57FA\u672C\u4E0A\u53EF\u4EE5\u548C\u6E38\u620F\u5A31\u4E50\u8BF4\u62DC\u62DC\u4E86\uFF0C\u65F6\u95F4\u6839\u672C\u5C31\u4E0D\u591F\u7528\u3002</p><p>\u5C0F\u59D0\u59D0\u804A\u5929\u7684\u65F6\u5019\u544A\u8BC9\u6211\uFF0C\u5979\u662F 17 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src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/chengxuyuannv-chonghui-java-3.png" alt=""></p><p>\u518D\u6765\u770B\u4E00\u4E0B\u4EFB\u804C\u8981\u6C42\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/chengxuyuannv-chonghui-java-4.png" alt=""></p><p>\u7B2C\u4E00\uFF0C\u7CBE\u901A Java \u8BED\u8A00\uFF0C\u73B0\u5728\u7684\u62DB\u8058\u8981\u6C42\u57FA\u672C\u4E0A\u90FD\u8FD9\u6837\uFF0C\u7CBE\u901A\u662F\u5E38\u6001\u3002\u9488\u5BF9\u8FD9\u79CD\u201C\u65E0\u7406\u201D\u7684\u8981\u6C42\uFF0C\u529E\u6CD5\u53EA\u6709\u4E00\u4E2A\uFF0C\u5C31\u662F\u53BB\u80CC\u516B\u80A1\u6587\uFF01\u5148\u80CC\u4F1A\u518D\u8BF4\u3002\u9762\u8BD5\u5B98\u95EE\u7684\u4F60\u80FD\u7B54\u4E0A\u6765\u5C31\u8868\u660E\u4F60\u662F\u7CBE\u901A\u3002</p><p>\u90A3\u4E8C\u54E5\u7684\u5C0F\u7834\u7AD9\uFF0C<strong>Java \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF</strong>\uFF0C\u57FA\u672C\u4E0A\u628A Java 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Java \u57FA\u7840\uFF0C\u5176\u6B21\u662F Spring \u5168\u5BB6\u6876\uFF0C\u4E4B\u540E\u662F MySQL\uFF0C\u7136\u540E\u662F\u8BA1\u7B97\u673A\u57FA\u7840\u77E5\u8BC6\uFF0C\u6700\u540E\u662F\u7EFC\u5408\u7D20\u8D28\u3002</p><p>\u7406\u6E05\u695A\u8FD9\u4E2A\uFF0C\u5C31\u77E5\u9053\u5B66\u4E60\u7684\u91CD\u70B9\u4E86\uFF0C\u63A5\u4E0B\u6765\u5C31\u662F\u5377\u3002</p><h3 id="\u4E09\u3001\u5F00\u59CB\u5377\u5427" tabindex="-1"><a class="header-anchor" href="#\u4E09\u3001\u5F00\u59CB\u5377\u5427" aria-hidden="true">#</a> \u4E09\u3001\u5F00\u59CB\u5377\u5427</h3><p>\u8BF4\u53E5\u5B9E\u5728\u8BDD\uFF0C\u5355\u8EAB\u201Csolo\u201D\u7684\u65F6\u5019\u6050\u6015\u662F\u5B66\u4E60\u65F6\u95F4\u6700\u5145\u5206\u7684\uFF1B\u7ED3\u5A5A\u751F\u5B50\u540E\uFF0C\u57FA\u672C\u4E0A\u53EF\u4EE5\u548C\u6E38\u620F\u5A31\u4E50\u8BF4\u62DC\u62DC\u4E86\uFF0C\u65F6\u95F4\u6839\u672C\u5C31\u4E0D\u591F\u7528\u3002</p><p>\u5C0F\u59D0\u59D0\u804A\u5929\u7684\u65F6\u5019\u544A\u8BC9\u6211\uFF0C\u5979\u662F 17 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\u4FBF\u53EA\u987E\u98CE\u96E8\u517C\u7A0B</strong>\uFF0C\u5377\u5427\uFF01</p><p>\u7ED9\u5C0F\u59D0\u59D0\u7684\u4E00\u70B9\u6E29\u99A8\u63D0\u9192\uFF0C\u4E00\u5B9A\u8981\u6CE8\u610F\u4F11\u606F\uFF0C\u8EAB\u4F53\u4E5F\u662F\u9769\u547D\u7684\u672C\u94B1\uFF0C\u8981\u7167\u987E\u597D\u81EA\u5DF1\u3002</p><p>\u6700\u540E\uFF0C\u4E5F\u5E0C\u671B\u5927\u5BB6\u80FD\u5728\u8BC4\u8BBA\u533A\u7ED9\u51FA\u81EA\u5DF1\u7684\u5EFA\u8BAE\uFF0C\u53EF\u4EE5\u7684\u8BDD\uFF0C\u70B9\u4E2A\u8D5E\uFF0C\u5C31\u5F53\u7ED9\u5C0F\u59D0\u59D0\u9F13\u52B1\u4E86\u3002\u6211\u4EEC\u4E0B\u671F\u89C1~</p>',13);function u(m,_){const p=o("ExternalLinkIcon");return r(),c("div",null,[h,e("p",null,[g,e("a",l,[v,s(p)]),d]),b])}var f=n(i,[["render",u],["__file","chengxuyuannv-chonghui-java.html.vue"]]);export{f as default};
diff --git a/dist/assets/chiner.html.5580190e.js b/dist/assets/chiner.html.daf0adff.js
similarity index 99%
rename from dist/assets/chiner.html.5580190e.js
rename to dist/assets/chiner.html.daf0adff.js
index 3604fbda..f7a7c870 100644
--- a/dist/assets/chiner.html.5580190e.js
+++ b/dist/assets/chiner.html.daf0adff.js
@@ -1 +1 @@
-import{_ as o}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o as c,c as i,a as e,b as r,e as n,d as a}from"./app.a0271b9c.js";const g={},s=n('<p>\u6700\u8FD1\u5728\u9020\u8F6E\u5B50\uFF0C\u4ECE 0 \u5230 1 \u7684\u90A3\u79CD\uFF0C\u5C31\u5DEE\u524D\u53F0\u7684\u754C\u9762\u4E86\uFF0C\u5927\u5BB6\u53EF\u4EE5\u8010\u5FC3\u8010\u5FC3\u8010\u5FC3\u671F\u5F85\u4E00\u4E0B\u3002\u5176\u4E2D\u9700\u8981\u8BBE\u8BA1\u4E00\u4E9B\u6570\u636E\u5E93\u8868\uFF0C\u53EF\u4EE5\u901A\u8FC7 Navicat \u8FD9\u79CD\u56FE\u5F62\u5316\u7BA1\u7406\u5DE5\u5177\u76F4\u63A5\u5F00\u641E\uFF0C\u4E5F\u53EF\u4EE5\u901A\u8FC7\u4E00\u4E9B\u6570\u636E\u5E93\u8BBE\u8BA1\u5DE5\u5177\u6765\u641E\uFF0C\u6BD4\u5982\u8BF4 PowerDesigner\uFF0C\u66F4\u4E13\u4E1A\u4E00\u70B9\u3002</p><p>\u4ECA\u5929\u6211\u7ED9\u5927\u5BB6\u63A8\u8350\u7684\u8FD9\u6B3E\u56FD\u4EBA\u5F00\u6E90\u7684\u6570\u636E\u5E93\u8BBE\u8BA1\u5DE5\u5177 chiner\uFF0C\u754C\u9762\u6F02\u4EAE\uFF0C\u529F\u80FD\u5F3A\u5927\uFF0C\u4F53\u9A8C\u540E\u7ED9\u6211\u7684\u611F\u89C9\u662F\u771F\u9999......</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-1.png" alt=""></p><h3 id="\u4E00\u3001\u5173\u4E8E-powerdesigner" tabindex="-1"><a class="header-anchor" href="#\u4E00\u3001\u5173\u4E8E-powerdesigner" aria-hidden="true">#</a> \u4E00\u3001\u5173\u4E8E PowerDesigner</h3><p>PowerDesigner \u662F\u4E00\u6B3E\u529F\u80FD\u975E\u5E38\u5F3A\u5927\u7684\u5EFA\u6A21\u5DE5\u5177\uFF0C\u53EF\u4EE5\u548C Rational Rose \u5AB2\u7F8E\u3002Rose \u4E13\u653B UML \u5BF9\u8C61\u6A21\u578B\u7684\u5EFA\u6A21\uFF0C\u4E4B\u540E\u624D\u62D3\u5C55\u5230\u6570\u636E\u5E93\u8FD9\u5757\u3002\u800C PowerDesigner \u662F\u4E00\u5F00\u59CB\u5C31\u4E3A\u6570\u636E\u5E93\u5EFA\u6A21\u670D\u52A1\u7684\uFF0C\u540E\u6765\u624D\u53D1\u5C55\u4E3A\u4E00\u6B3E\u7EFC\u5408\u6218\u6597\u529B\u90FD\u8FD8\u4E0D\u9519\u7684\u5EFA\u6A21\u5DE5\u5177\u3002</p><p>\u4E0D\u8FC7\uFF0C\u8BF4\u53E5\u5B9E\u5728\u8BDD\uFF0CPowerDesigner \u7684\u754C\u9762\u504F\u53E4\u5178\u4E00\u4E9B\uFF0C\u4E0B\u9762\u662F\u6211\u7528 PowerDesigner \u8BBE\u8BA1 DB \u7684\u6548\u679C\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-2.png" alt=""></p><h3 id="\u4E8C\u3001\u5173\u4E8E-chiner" tabindex="-1"><a class="header-anchor" href="#\u4E8C\u3001\u5173\u4E8E-chiner" aria-hidden="true">#</a> \u4E8C\u3001\u5173\u4E8E chiner</h3><p>chiner\uFF0C\u53D1\u97F3\uFF1A[ka\u026A\u02C8n\u0259r]\uFF0C\u4F7F\u7528React+Electron+Java\u6280\u672F\u4F53\u7CFB\u6784\u5EFA\u7684\u4E00\u6B3E\u5143\u6570\u5EFA\u6A21\u5E73\u53F0\u3002</p><p>2018 \u5E74\uFF0C\u4F5C\u8005\u548C\u51E0\u4E2A\u5BF9\u5F00\u6E90\u6709\u5174\u8DA3\u7684\u793E\u533A\u597D\u53CB\u5F00\u59CB\u6253\u78E8\u4EA7\u54C1\u7684\u539F\u56E0\uFF0C\u5386\u7ECF\u4E09\u4EE3\uFF0C\u76F4\u5230 2021 \u5E74 7 \u6708\u4EFD\uFF0C\u7EC8\u4E8E\u63A8\u51FA\u4E86\u8239\u65B0\u7684 3.0 \u7248\u672C\u3002</p><p>2019 \u5E74\u5E95\uFF0C\u56E2\u961F\u5DEE\u70B9\u89E3\u6563\uFF0C\u5E78\u597D\u6709\u51E0\u4F4D\u597D\u53CB\u5173\u7167\uFF0C\u7ED9\u4E86\u56E2\u961F\u4E24\u4E2A\u9879\u76EE\u505A\uFF0C\u8FD9\u624D\u7B97\u662F\u71AC\u4E86\u8FC7\u53BB\u3002</p><p>\u4E0D\u5F97\u4E0D\u8BF4\uFF0C\u505A\u4EFB\u4F55\u4E00\u4EF6\u4E8B\u60C5\u90FD\u4E0D\u5BB9\u6613\u554A\uFF0C\u5149\u9760\u60C5\u6000\u4E5F\u8BB8\u53EF\u4EE5\u6491\u8FC7\u4EA7\u54C1\u521D\u671F\uFF0C\u4F46\u8D8A\u5F80\u540E\u53BB\uFF0C\u9047\u5230\u751F\u5B58\u95EE\u9898\u65F6\uFF0C\u5C31\u4F1A\u975E\u5E38\u56F0\u96BE\u3002</p><p>\u5728\u6B64\uFF0C\u6211\u4EEC\u5FC5\u987B\u5F97\u4E3A\u6BCF\u4E00\u4F4D\u5F00\u6E90\u4F5C\u8005\u5949\u4E0A\u6700\u771F\u8BDA\u7684\u638C\u58F0\uFF0C\u5E0C\u671B\u4ED6\u4EEC\u7684\u4EA7\u54C1\u90FD\u80FD\u6709\u4E00\u756A\u5929\u5730\u3002\u4E5F\u5E0C\u671B\uFF0C\u672A\u6765\u6211\u7684\u4EA7\u54C1\u51FA\u73B0\u5728\u5927\u5BB6\u7684\u9762\u524D\u65F6\uFF0C\u80FD\u7ED9\u5B83\u591A\u4E00\u70B9\u70B9\u5305\u5BB9\u548C\u652F\u6301\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-3.gif" alt=""></p><h3 id="\u4E09\u3001\u5B89\u88C5-chiner" tabindex="-1"><a class="header-anchor" href="#\u4E09\u3001\u5B89\u88C5-chiner" aria-hidden="true">#</a> \u4E09\u3001\u5B89\u88C5 chiner</h3><p>chiner \u652F\u6301 Windows\u3001macOS \u548C Linux\uFF0C\u4E0B\u8F7D\u5730\u5740\u5982\u4E0B\u6240\u793A\uFF1A</p>',16),h={href:"https://gitee.com/robergroup/chiner/releases",target:"_blank",rel:"noopener noreferrer"},b=a("https://gitee.com/robergroup/chiner/releases"),m=n('<p>\u7801\u4E91\u505A\u4E86\u5916\u90E8\u94FE\u63A5\u7684\u62E6\u622A\uFF0C\u5BFC\u81F4\u76F4\u63A5\u590D\u5236\u94FE\u63A5\u5230\u5730\u5740\u680F\u624D\u80FD\u5B8C\u6210\u4E0B\u8F7D\u3002\u6211\u8FD9\u91CC\u4EE5 macOS \u4E3A\u4F8B\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-4.png" alt=""></p><p>\u5B89\u88C5\u5B8C\u6210\u540E\u9996\u6B21\u6253\u5F00\u7684\u6837\u5B50\u662F\u8FD9\u6837\u7684\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-5.png" alt=""></p><p>chiner \u63D0\u4F9B\u4E86\u975E\u5E38\u8D34\u5FC3\u7684\u64CD\u4F5C\u624B\u518C\u548C\u53C2\u8003\u6A21\u677F\uFF0C\u5982\u679C\u65F6\u95F4\u6BD4\u8F83\u5145\u5206\u7684\u8BDD\uFF0C\u53EF\u4EE5\u5148\u628A\u64CD\u4F5C\u624B\u518C\u8FC7\u4E00\u904D\uFF0C\u5199\u5F97\u975E\u5E38\u8BE6\u7EC6\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-6.png" alt=""></p><h3 id="\u56DB\u3001\u4E0A\u624B-chiner" tabindex="-1"><a class="header-anchor" href="#\u56DB\u3001\u4E0A\u624B-chiner" aria-hidden="true">#</a> \u56DB\u3001\u4E0A\u624B chiner</h3><p><strong>01\u3001\u5BFC\u5165\u5BFC\u51FA</strong></p><p>\u56E0\u4E3A\u6211\u4E4B\u524D\u6709\u4E00\u4EFD PowerDesigner \u6587\u4EF6\uFF0C\u6240\u4EE5\u53EF\u4EE5\u76F4\u63A5\u5BFC\u5165\u5230 chiner\u3002</p><p>\u7B2C\u4E00\u6B65\uFF0C\u65B0\u5EFA\u4E00\u4E2A\u9879\u76EE codingmore\u3002</p><p>\u7B2C\u4E8C\u6B65\uFF0C\u9009\u62E9\u5BFC\u5165 PowerDesigner \u6587\u4EF6\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-7.png" alt=""></p><p>\u7B2C\u4E09\u6B65\uFF0C\u9009\u62E9\u8981\u6DFB\u52A0\u7684\u6570\u636E\u8868\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-8.png" alt=""></p><p>\u7B2C\u56DB\u6B65\uFF0C\u5BFC\u5165\u5B8C\u6210\u540E\uFF0C\u5C31\u53EF\u4EE5\u70B9\u5F00\u5355\u8868\u8FDB\u884C\u67E5\u770B\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-9.png" alt=""></p><p>\u7B2C\u4E94\u6B65\uFF0C\u5F53\u5B8C\u6210\u91CD\u65B0\u8BBE\u8BA1\u540E\uFF0C\u5C31\u53EF\u4EE5\u9009\u62E9\u5BFC\u51FA DDL \u5230\u6570\u636E\u5E93\u8868\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-10.png" alt=""></p><p>\u5F53\u7136\u4E86\uFF0C\u4E5F\u53EF\u4EE5\u76F4\u63A5\u914D\u7F6E\u6570\u636E\u5E93 DB\uFF0C\u8FD9\u6837\u5C31\u53EF\u4EE5\u76F4\u63A5\u8FDE\u63A5\u5BFC\u5165\u5BFC\u51FA\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-11.png" alt=""></p><p>\u5BFC\u51FA\u7684 SQL \u6587\u4EF6\u53EF\u4EE5\u76F4\u63A5\u901A\u8FC7\u5B9D\u5854\u9762\u677F\u4E0A\u4F20\u5230\u670D\u52A1\u5668\u7AEF\uFF0C\u7136\u540E\u518D\u76F4\u63A5\u5BFC\u5165\u5230\u6570\u636E\u5E93\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-12.png" alt=""></p><p>\u5982\u679C\u9700\u8981\u7528\u5230\u6570\u636E\u5E93\u8BF4\u660E\u6587\u6863\u7684\u8BDD\uFF0C\u4E5F\u53EF\u4EE5\u76F4\u63A5\u901A\u8FC7\u5BFC\u51FA\u5230 Word \u6587\u6863\u6765\u5B8C\u6210\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-13.png" alt=""></p><p><strong>02\u3001\u7EF4\u62A4\u6570\u636E\u7C7B\u578B</strong></p><p>chiner \u81EA\u5E26\u4E86\u51E0\u79CD\u5E38\u89C1\u7684\u6570\u636E\u7C7B\u578B\uFF0C\u6BD4\u5982\u5B57\u4E32\u3001\u5C0F\u6570\u3001\u65E5\u671F\u7B49\uFF0C\u6211\u4EEC\u4E5F\u53EF\u4EE5\u6839\u636E\u81EA\u5DF1\u7684\u9700\u8981\u6DFB\u52A0\u65B0\u7684\u6570\u636E\u7C7B\u578B\u3002</p><p>\u6BD4\u5982\u8BF4\u9ED8\u8BA4\u7684\u5B57\u4E32\u7C7B\u578B\u5173\u8054\u5230\u5176\u4ED6\u6570\u636E\u5E93\u7684\u7C7B\u578B\u5982\u4E0B\u6240\u793A\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-14.png" alt=""></p><p>\u6570\u636E\u57DF\u662F\u5728\u6570\u636E\u7C7B\u578B\u7684\u57FA\u7840\u4E0A\uFF0C\u57FA\u4E8E\u5F53\u524D\u9879\u76EE\u5B9A\u4E49\u7684\u6709\u4E00\u5B9A\u4E1A\u52A1\u542B\u4E49\u7684\u6570\u636E\u7C7B\u578B\uFF0C\u6BD4\u5982\u8BF4\u6211\u8FD9\u91CC\u7EF4\u62A4\u4E86\u4E00\u4E2A\u957F\u5EA6\u4E3A 90 \u7684\u540D\u79F0\u6570\u636E\u57DF\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-15.png" alt=""></p><p>\u5F53\u6211\u9700\u8981\u628A\u67D0\u4E2A\u6570\u636E\u5B57\u6BB5\u7684\u6570\u636E\u57DF\u8BBE\u7F6E\u6210\u300C\u540D\u79F0\u300D\u7684\u65F6\u5019\uFF0C\u957F\u5EA6\u5C31\u4F1A\u81EA\u52A8\u586B\u5145\u4E3A 90\uFF0C\u4E0D\u9700\u8981\u624B\u52A8\u518D\u53BB\u8BBE\u7F6E\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-16.png" alt=""></p><p><strong>03\u3001\u7EF4\u62A4\u6570\u636E\u8868</strong></p><p>\u7B2C\u4E00\u6B65\uFF0C\u9009\u4E2D\u6570\u636E\u8868\uFF0C\u53F3\u952E\u9009\u62E9\u300C\u65B0\u589E\u6570\u636E\u8868\u300D</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-17.png" alt=""></p><p>\u7B2C\u4E8C\u6B65\uFF0C\u586B\u5199\u6570\u636E\u8868\u540D</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-18.png" alt=""></p><p>\u70B9\u51FB\u300C\u786E\u5B9A\u300D\u540E\uFF0Cchiner \u4F1A\u5E2E\u6211\u4EEC\u81EA\u52A8\u751F\u6210\u4E00\u4E9B\u5E38\u89C1\u5E38\u7528\u7684\u5B57\u6BB5\uFF0C\u6BD4\u5982\u8BF4\u521B\u5EFA\u4EBA\u3001\u521B\u5EFA\u65F6\u95F4\u3001\u66F4\u65B0\u4EBA\u3001\u66F4\u65B0\u65F6\u95F4\u7B49\uFF0C\u975E\u5E38\u7684\u667A\u80FD\u5316\u3002\u901A\u5E38\u6765\u8BF4\uFF0C\u8FD9\u4E9B\u5B57\u6BB5\u90FD\u662F\u5FC5\u987B\u7684\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-19.png" alt=""></p><p>\u5982\u679C\u8FD9\u4E9B\u9ED8\u8BA4\u5B57\u6BB5\u4E0D\u6EE1\u8DB3\u9700\u6C42\u7684\u65F6\u5019\uFF0C\u8FD8\u53EF\u4EE5\u70B9\u51FB\u300C\u8BBE\u7F6E\u300D\u65B0\u589E\u9ED8\u8BA4\u5B57\u6BB5\uFF0C\u6BD4\u5982\u8BF4\u5220\u9664\u6807\u8BB0\uFF0C\u4E00\u822C\u6765\u8BF4\u4E3A\u4E86\u5B89\u5168\u8D77\u89C1\uFF0C\u6570\u636E\u5E93\u90FD\u4F1A\u91C7\u7528\u975E\u7269\u7406\u5220\u9664\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-20.png" alt=""></p><p>\u4E00\u822C\u6765\u8BF4\uFF0C\u6211\u4EEC\u66F4\u4E60\u60EF\u5B57\u6BB5\u5C0F\u5199\u547D\u540D\uFF0C\u56E0\u6B64\u53EF\u4EE5\u76F4\u63A5\u9009\u4E2D\u4E00\u5217\uFF0C\u7136\u540E\u9009\u62E9\u5927\u5C0F\u5199\u8F6C\u6362\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-21.png" alt=""></p><p>\u5C31\u53D8\u6210\u5C0F\u5199\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-22.png" alt=""></p><p><strong>04\u3001\u7EF4\u62A4\u5173\u7CFB\u56FE</strong></p><p>\u7B2C\u4E00\u6B65\uFF0C\u9009\u62E9\u300C\u5173\u7CFB\u56FE\u300D\uFF0C\u53F3\u952E\u9009\u62E9\u300C\u65B0\u589E\u5173\u7CFB\u56FE\u300D</p><p>\u7B2C\u4E8C\u6B65\uFF0C\u628A\u9700\u8981\u5173\u8054\u7684\u8868\u62D6\u62FD\u5230\u53F3\u4FA7\u7684\u9762\u677F\u5F53\u4E2D\uFF0C\u7136\u540E\u6309\u7167\u5B57\u6BB5\u8FDB\u884C\u8FDE\u7EBF\uFF0C\u975E\u5E38\u7684\u65B9\u4FBF\u3002\u6BD4\u5982\u8BF4\u73ED\u7EA7\u548C\u5B66\u9662\u8868\u3001\u73ED\u7EA7\u548C\u4E13\u4E1A\u8868\u7684\u5173\u7CFB\uFF0C\u5C31\u5982\u4E0B\u56FE\u6240\u793A\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-23.png" alt=""></p><p>\u6765\u770B\u4E00\u4E0B\u6574\u4F53\u7ED9\u51FA\u6765\u7684\u5173\u7CFB\u56FE\uFF0C\u8FD8\u662F\u975E\u5E38\u6E05\u723D\u7684\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-24.png" alt=""></p><h3 id="\u4E94\u3001\u5C3E\u58F0" tabindex="-1"><a class="header-anchor" href="#\u4E94\u3001\u5C3E\u58F0" aria-hidden="true">#</a> \u4E94\u3001\u5C3E\u58F0</h3><p>chiner \u8FD8\u6709\u66F4\u591A\u66F4\u5F3A\u5927\u7684\u529F\u80FD\uFF0C\u5927\u5BB6\u89C9\u5F97\u4E0D\u9519\u7684\u8BDD\uFF0C\u53EF\u4EE5\u53BB\u5C1D\u8BD5\u4E00\u4E0B\u3002\u7528\u7684\u719F\u7EC3\u7684\u8BDD\uFF0C\u80AF\u5B9A\u80FD\u5728\u5F88\u5927\u7A0B\u5EA6\u4E0A\u63D0\u9AD8\u751F\u4EA7\u6548\u7387\u3002</p><p>\u5C31\u6211\u4E2A\u4EBA\u7684\u4F7F\u7528\u4F53\u9A8C\u6765\u8BF4\uFF0Cchiner \u6BD4 PowerDesigner \u66F4\u8F7B\u91CF\u7EA7\uFF0C\u4E5F\u66F4\u7B26\u5408\u65E5\u5E38\u7684\u64CD\u4F5C\u4E60\u60EF\uFF0C\u4E3A\u56FD\u4EA7\u5F00\u6E90\u70B9\u8D5E\uFF01</p><p>\u9879\u76EE\u5730\u5740\uFF1A</p>',55),d={href:"https://gitee.com/robergroup/chiner",target:"_blank",rel:"noopener noreferrer"},j=a("https://gitee.com/robergroup/chiner"),l=e("p",null,"\u4F7F\u7528\u624B\u518C\uFF1A",-1),u={href:"https://www.yuque.com/chiner/docs/manual",target:"_blank",rel:"noopener noreferrer"},v=a("https://www.yuque.com/chiner/docs/manual"),_=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png",alt:""})],-1);function f(w,x){const t=p("ExternalLinkIcon");return c(),i("div",null,[s,e("blockquote",null,[e("p",null,[e("a",h,[b,r(t)])])]),m,e("blockquote",null,[e("p",null,[e("a",d,[j,r(t)])])]),l,e("blockquote",null,[e("p",null,[e("a",u,[v,r(t)])])]),_])}var P=o(g,[["render",f],["__file","chiner.html.vue"]]);export{P as default};
+import{_ as o}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o as c,c as i,a as e,b as r,e as n,d as a}from"./app.615e41d8.js";const g={},s=n('<p>\u6700\u8FD1\u5728\u9020\u8F6E\u5B50\uFF0C\u4ECE 0 \u5230 1 \u7684\u90A3\u79CD\uFF0C\u5C31\u5DEE\u524D\u53F0\u7684\u754C\u9762\u4E86\uFF0C\u5927\u5BB6\u53EF\u4EE5\u8010\u5FC3\u8010\u5FC3\u8010\u5FC3\u671F\u5F85\u4E00\u4E0B\u3002\u5176\u4E2D\u9700\u8981\u8BBE\u8BA1\u4E00\u4E9B\u6570\u636E\u5E93\u8868\uFF0C\u53EF\u4EE5\u901A\u8FC7 Navicat \u8FD9\u79CD\u56FE\u5F62\u5316\u7BA1\u7406\u5DE5\u5177\u76F4\u63A5\u5F00\u641E\uFF0C\u4E5F\u53EF\u4EE5\u901A\u8FC7\u4E00\u4E9B\u6570\u636E\u5E93\u8BBE\u8BA1\u5DE5\u5177\u6765\u641E\uFF0C\u6BD4\u5982\u8BF4 PowerDesigner\uFF0C\u66F4\u4E13\u4E1A\u4E00\u70B9\u3002</p><p>\u4ECA\u5929\u6211\u7ED9\u5927\u5BB6\u63A8\u8350\u7684\u8FD9\u6B3E\u56FD\u4EBA\u5F00\u6E90\u7684\u6570\u636E\u5E93\u8BBE\u8BA1\u5DE5\u5177 chiner\uFF0C\u754C\u9762\u6F02\u4EAE\uFF0C\u529F\u80FD\u5F3A\u5927\uFF0C\u4F53\u9A8C\u540E\u7ED9\u6211\u7684\u611F\u89C9\u662F\u771F\u9999......</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-1.png" alt=""></p><h3 id="\u4E00\u3001\u5173\u4E8E-powerdesigner" tabindex="-1"><a class="header-anchor" href="#\u4E00\u3001\u5173\u4E8E-powerdesigner" aria-hidden="true">#</a> \u4E00\u3001\u5173\u4E8E PowerDesigner</h3><p>PowerDesigner \u662F\u4E00\u6B3E\u529F\u80FD\u975E\u5E38\u5F3A\u5927\u7684\u5EFA\u6A21\u5DE5\u5177\uFF0C\u53EF\u4EE5\u548C Rational Rose \u5AB2\u7F8E\u3002Rose \u4E13\u653B UML \u5BF9\u8C61\u6A21\u578B\u7684\u5EFA\u6A21\uFF0C\u4E4B\u540E\u624D\u62D3\u5C55\u5230\u6570\u636E\u5E93\u8FD9\u5757\u3002\u800C PowerDesigner \u662F\u4E00\u5F00\u59CB\u5C31\u4E3A\u6570\u636E\u5E93\u5EFA\u6A21\u670D\u52A1\u7684\uFF0C\u540E\u6765\u624D\u53D1\u5C55\u4E3A\u4E00\u6B3E\u7EFC\u5408\u6218\u6597\u529B\u90FD\u8FD8\u4E0D\u9519\u7684\u5EFA\u6A21\u5DE5\u5177\u3002</p><p>\u4E0D\u8FC7\uFF0C\u8BF4\u53E5\u5B9E\u5728\u8BDD\uFF0CPowerDesigner \u7684\u754C\u9762\u504F\u53E4\u5178\u4E00\u4E9B\uFF0C\u4E0B\u9762\u662F\u6211\u7528 PowerDesigner \u8BBE\u8BA1 DB \u7684\u6548\u679C\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-2.png" alt=""></p><h3 id="\u4E8C\u3001\u5173\u4E8E-chiner" tabindex="-1"><a class="header-anchor" href="#\u4E8C\u3001\u5173\u4E8E-chiner" aria-hidden="true">#</a> \u4E8C\u3001\u5173\u4E8E chiner</h3><p>chiner\uFF0C\u53D1\u97F3\uFF1A[ka\u026A\u02C8n\u0259r]\uFF0C\u4F7F\u7528React+Electron+Java\u6280\u672F\u4F53\u7CFB\u6784\u5EFA\u7684\u4E00\u6B3E\u5143\u6570\u5EFA\u6A21\u5E73\u53F0\u3002</p><p>2018 \u5E74\uFF0C\u4F5C\u8005\u548C\u51E0\u4E2A\u5BF9\u5F00\u6E90\u6709\u5174\u8DA3\u7684\u793E\u533A\u597D\u53CB\u5F00\u59CB\u6253\u78E8\u4EA7\u54C1\u7684\u539F\u56E0\uFF0C\u5386\u7ECF\u4E09\u4EE3\uFF0C\u76F4\u5230 2021 \u5E74 7 \u6708\u4EFD\uFF0C\u7EC8\u4E8E\u63A8\u51FA\u4E86\u8239\u65B0\u7684 3.0 \u7248\u672C\u3002</p><p>2019 \u5E74\u5E95\uFF0C\u56E2\u961F\u5DEE\u70B9\u89E3\u6563\uFF0C\u5E78\u597D\u6709\u51E0\u4F4D\u597D\u53CB\u5173\u7167\uFF0C\u7ED9\u4E86\u56E2\u961F\u4E24\u4E2A\u9879\u76EE\u505A\uFF0C\u8FD9\u624D\u7B97\u662F\u71AC\u4E86\u8FC7\u53BB\u3002</p><p>\u4E0D\u5F97\u4E0D\u8BF4\uFF0C\u505A\u4EFB\u4F55\u4E00\u4EF6\u4E8B\u60C5\u90FD\u4E0D\u5BB9\u6613\u554A\uFF0C\u5149\u9760\u60C5\u6000\u4E5F\u8BB8\u53EF\u4EE5\u6491\u8FC7\u4EA7\u54C1\u521D\u671F\uFF0C\u4F46\u8D8A\u5F80\u540E\u53BB\uFF0C\u9047\u5230\u751F\u5B58\u95EE\u9898\u65F6\uFF0C\u5C31\u4F1A\u975E\u5E38\u56F0\u96BE\u3002</p><p>\u5728\u6B64\uFF0C\u6211\u4EEC\u5FC5\u987B\u5F97\u4E3A\u6BCF\u4E00\u4F4D\u5F00\u6E90\u4F5C\u8005\u5949\u4E0A\u6700\u771F\u8BDA\u7684\u638C\u58F0\uFF0C\u5E0C\u671B\u4ED6\u4EEC\u7684\u4EA7\u54C1\u90FD\u80FD\u6709\u4E00\u756A\u5929\u5730\u3002\u4E5F\u5E0C\u671B\uFF0C\u672A\u6765\u6211\u7684\u4EA7\u54C1\u51FA\u73B0\u5728\u5927\u5BB6\u7684\u9762\u524D\u65F6\uFF0C\u80FD\u7ED9\u5B83\u591A\u4E00\u70B9\u70B9\u5305\u5BB9\u548C\u652F\u6301\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-3.gif" alt=""></p><h3 id="\u4E09\u3001\u5B89\u88C5-chiner" tabindex="-1"><a class="header-anchor" href="#\u4E09\u3001\u5B89\u88C5-chiner" aria-hidden="true">#</a> \u4E09\u3001\u5B89\u88C5 chiner</h3><p>chiner \u652F\u6301 Windows\u3001macOS \u548C Linux\uFF0C\u4E0B\u8F7D\u5730\u5740\u5982\u4E0B\u6240\u793A\uFF1A</p>',16),h={href:"https://gitee.com/robergroup/chiner/releases",target:"_blank",rel:"noopener noreferrer"},b=a("https://gitee.com/robergroup/chiner/releases"),m=n('<p>\u7801\u4E91\u505A\u4E86\u5916\u90E8\u94FE\u63A5\u7684\u62E6\u622A\uFF0C\u5BFC\u81F4\u76F4\u63A5\u590D\u5236\u94FE\u63A5\u5230\u5730\u5740\u680F\u624D\u80FD\u5B8C\u6210\u4E0B\u8F7D\u3002\u6211\u8FD9\u91CC\u4EE5 macOS \u4E3A\u4F8B\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-4.png" alt=""></p><p>\u5B89\u88C5\u5B8C\u6210\u540E\u9996\u6B21\u6253\u5F00\u7684\u6837\u5B50\u662F\u8FD9\u6837\u7684\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-5.png" alt=""></p><p>chiner \u63D0\u4F9B\u4E86\u975E\u5E38\u8D34\u5FC3\u7684\u64CD\u4F5C\u624B\u518C\u548C\u53C2\u8003\u6A21\u677F\uFF0C\u5982\u679C\u65F6\u95F4\u6BD4\u8F83\u5145\u5206\u7684\u8BDD\uFF0C\u53EF\u4EE5\u5148\u628A\u64CD\u4F5C\u624B\u518C\u8FC7\u4E00\u904D\uFF0C\u5199\u5F97\u975E\u5E38\u8BE6\u7EC6\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-6.png" alt=""></p><h3 id="\u56DB\u3001\u4E0A\u624B-chiner" tabindex="-1"><a class="header-anchor" href="#\u56DB\u3001\u4E0A\u624B-chiner" aria-hidden="true">#</a> \u56DB\u3001\u4E0A\u624B chiner</h3><p><strong>01\u3001\u5BFC\u5165\u5BFC\u51FA</strong></p><p>\u56E0\u4E3A\u6211\u4E4B\u524D\u6709\u4E00\u4EFD PowerDesigner \u6587\u4EF6\uFF0C\u6240\u4EE5\u53EF\u4EE5\u76F4\u63A5\u5BFC\u5165\u5230 chiner\u3002</p><p>\u7B2C\u4E00\u6B65\uFF0C\u65B0\u5EFA\u4E00\u4E2A\u9879\u76EE codingmore\u3002</p><p>\u7B2C\u4E8C\u6B65\uFF0C\u9009\u62E9\u5BFC\u5165 PowerDesigner \u6587\u4EF6\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-7.png" alt=""></p><p>\u7B2C\u4E09\u6B65\uFF0C\u9009\u62E9\u8981\u6DFB\u52A0\u7684\u6570\u636E\u8868\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-8.png" alt=""></p><p>\u7B2C\u56DB\u6B65\uFF0C\u5BFC\u5165\u5B8C\u6210\u540E\uFF0C\u5C31\u53EF\u4EE5\u70B9\u5F00\u5355\u8868\u8FDB\u884C\u67E5\u770B\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-9.png" alt=""></p><p>\u7B2C\u4E94\u6B65\uFF0C\u5F53\u5B8C\u6210\u91CD\u65B0\u8BBE\u8BA1\u540E\uFF0C\u5C31\u53EF\u4EE5\u9009\u62E9\u5BFC\u51FA DDL \u5230\u6570\u636E\u5E93\u8868\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-10.png" alt=""></p><p>\u5F53\u7136\u4E86\uFF0C\u4E5F\u53EF\u4EE5\u76F4\u63A5\u914D\u7F6E\u6570\u636E\u5E93 DB\uFF0C\u8FD9\u6837\u5C31\u53EF\u4EE5\u76F4\u63A5\u8FDE\u63A5\u5BFC\u5165\u5BFC\u51FA\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-11.png" alt=""></p><p>\u5BFC\u51FA\u7684 SQL \u6587\u4EF6\u53EF\u4EE5\u76F4\u63A5\u901A\u8FC7\u5B9D\u5854\u9762\u677F\u4E0A\u4F20\u5230\u670D\u52A1\u5668\u7AEF\uFF0C\u7136\u540E\u518D\u76F4\u63A5\u5BFC\u5165\u5230\u6570\u636E\u5E93\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-12.png" alt=""></p><p>\u5982\u679C\u9700\u8981\u7528\u5230\u6570\u636E\u5E93\u8BF4\u660E\u6587\u6863\u7684\u8BDD\uFF0C\u4E5F\u53EF\u4EE5\u76F4\u63A5\u901A\u8FC7\u5BFC\u51FA\u5230 Word \u6587\u6863\u6765\u5B8C\u6210\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-13.png" alt=""></p><p><strong>02\u3001\u7EF4\u62A4\u6570\u636E\u7C7B\u578B</strong></p><p>chiner \u81EA\u5E26\u4E86\u51E0\u79CD\u5E38\u89C1\u7684\u6570\u636E\u7C7B\u578B\uFF0C\u6BD4\u5982\u5B57\u4E32\u3001\u5C0F\u6570\u3001\u65E5\u671F\u7B49\uFF0C\u6211\u4EEC\u4E5F\u53EF\u4EE5\u6839\u636E\u81EA\u5DF1\u7684\u9700\u8981\u6DFB\u52A0\u65B0\u7684\u6570\u636E\u7C7B\u578B\u3002</p><p>\u6BD4\u5982\u8BF4\u9ED8\u8BA4\u7684\u5B57\u4E32\u7C7B\u578B\u5173\u8054\u5230\u5176\u4ED6\u6570\u636E\u5E93\u7684\u7C7B\u578B\u5982\u4E0B\u6240\u793A\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-14.png" alt=""></p><p>\u6570\u636E\u57DF\u662F\u5728\u6570\u636E\u7C7B\u578B\u7684\u57FA\u7840\u4E0A\uFF0C\u57FA\u4E8E\u5F53\u524D\u9879\u76EE\u5B9A\u4E49\u7684\u6709\u4E00\u5B9A\u4E1A\u52A1\u542B\u4E49\u7684\u6570\u636E\u7C7B\u578B\uFF0C\u6BD4\u5982\u8BF4\u6211\u8FD9\u91CC\u7EF4\u62A4\u4E86\u4E00\u4E2A\u957F\u5EA6\u4E3A 90 \u7684\u540D\u79F0\u6570\u636E\u57DF\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-15.png" alt=""></p><p>\u5F53\u6211\u9700\u8981\u628A\u67D0\u4E2A\u6570\u636E\u5B57\u6BB5\u7684\u6570\u636E\u57DF\u8BBE\u7F6E\u6210\u300C\u540D\u79F0\u300D\u7684\u65F6\u5019\uFF0C\u957F\u5EA6\u5C31\u4F1A\u81EA\u52A8\u586B\u5145\u4E3A 90\uFF0C\u4E0D\u9700\u8981\u624B\u52A8\u518D\u53BB\u8BBE\u7F6E\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-16.png" alt=""></p><p><strong>03\u3001\u7EF4\u62A4\u6570\u636E\u8868</strong></p><p>\u7B2C\u4E00\u6B65\uFF0C\u9009\u4E2D\u6570\u636E\u8868\uFF0C\u53F3\u952E\u9009\u62E9\u300C\u65B0\u589E\u6570\u636E\u8868\u300D</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-17.png" alt=""></p><p>\u7B2C\u4E8C\u6B65\uFF0C\u586B\u5199\u6570\u636E\u8868\u540D</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-18.png" alt=""></p><p>\u70B9\u51FB\u300C\u786E\u5B9A\u300D\u540E\uFF0Cchiner \u4F1A\u5E2E\u6211\u4EEC\u81EA\u52A8\u751F\u6210\u4E00\u4E9B\u5E38\u89C1\u5E38\u7528\u7684\u5B57\u6BB5\uFF0C\u6BD4\u5982\u8BF4\u521B\u5EFA\u4EBA\u3001\u521B\u5EFA\u65F6\u95F4\u3001\u66F4\u65B0\u4EBA\u3001\u66F4\u65B0\u65F6\u95F4\u7B49\uFF0C\u975E\u5E38\u7684\u667A\u80FD\u5316\u3002\u901A\u5E38\u6765\u8BF4\uFF0C\u8FD9\u4E9B\u5B57\u6BB5\u90FD\u662F\u5FC5\u987B\u7684\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-19.png" alt=""></p><p>\u5982\u679C\u8FD9\u4E9B\u9ED8\u8BA4\u5B57\u6BB5\u4E0D\u6EE1\u8DB3\u9700\u6C42\u7684\u65F6\u5019\uFF0C\u8FD8\u53EF\u4EE5\u70B9\u51FB\u300C\u8BBE\u7F6E\u300D\u65B0\u589E\u9ED8\u8BA4\u5B57\u6BB5\uFF0C\u6BD4\u5982\u8BF4\u5220\u9664\u6807\u8BB0\uFF0C\u4E00\u822C\u6765\u8BF4\u4E3A\u4E86\u5B89\u5168\u8D77\u89C1\uFF0C\u6570\u636E\u5E93\u90FD\u4F1A\u91C7\u7528\u975E\u7269\u7406\u5220\u9664\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-20.png" alt=""></p><p>\u4E00\u822C\u6765\u8BF4\uFF0C\u6211\u4EEC\u66F4\u4E60\u60EF\u5B57\u6BB5\u5C0F\u5199\u547D\u540D\uFF0C\u56E0\u6B64\u53EF\u4EE5\u76F4\u63A5\u9009\u4E2D\u4E00\u5217\uFF0C\u7136\u540E\u9009\u62E9\u5927\u5C0F\u5199\u8F6C\u6362\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-21.png" alt=""></p><p>\u5C31\u53D8\u6210\u5C0F\u5199\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-22.png" alt=""></p><p><strong>04\u3001\u7EF4\u62A4\u5173\u7CFB\u56FE</strong></p><p>\u7B2C\u4E00\u6B65\uFF0C\u9009\u62E9\u300C\u5173\u7CFB\u56FE\u300D\uFF0C\u53F3\u952E\u9009\u62E9\u300C\u65B0\u589E\u5173\u7CFB\u56FE\u300D</p><p>\u7B2C\u4E8C\u6B65\uFF0C\u628A\u9700\u8981\u5173\u8054\u7684\u8868\u62D6\u62FD\u5230\u53F3\u4FA7\u7684\u9762\u677F\u5F53\u4E2D\uFF0C\u7136\u540E\u6309\u7167\u5B57\u6BB5\u8FDB\u884C\u8FDE\u7EBF\uFF0C\u975E\u5E38\u7684\u65B9\u4FBF\u3002\u6BD4\u5982\u8BF4\u73ED\u7EA7\u548C\u5B66\u9662\u8868\u3001\u73ED\u7EA7\u548C\u4E13\u4E1A\u8868\u7684\u5173\u7CFB\uFF0C\u5C31\u5982\u4E0B\u56FE\u6240\u793A\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-23.png" alt=""></p><p>\u6765\u770B\u4E00\u4E0B\u6574\u4F53\u7ED9\u51FA\u6765\u7684\u5173\u7CFB\u56FE\uFF0C\u8FD8\u662F\u975E\u5E38\u6E05\u723D\u7684\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-24.png" alt=""></p><h3 id="\u4E94\u3001\u5C3E\u58F0" tabindex="-1"><a class="header-anchor" href="#\u4E94\u3001\u5C3E\u58F0" aria-hidden="true">#</a> \u4E94\u3001\u5C3E\u58F0</h3><p>chiner \u8FD8\u6709\u66F4\u591A\u66F4\u5F3A\u5927\u7684\u529F\u80FD\uFF0C\u5927\u5BB6\u89C9\u5F97\u4E0D\u9519\u7684\u8BDD\uFF0C\u53EF\u4EE5\u53BB\u5C1D\u8BD5\u4E00\u4E0B\u3002\u7528\u7684\u719F\u7EC3\u7684\u8BDD\uFF0C\u80AF\u5B9A\u80FD\u5728\u5F88\u5927\u7A0B\u5EA6\u4E0A\u63D0\u9AD8\u751F\u4EA7\u6548\u7387\u3002</p><p>\u5C31\u6211\u4E2A\u4EBA\u7684\u4F7F\u7528\u4F53\u9A8C\u6765\u8BF4\uFF0Cchiner \u6BD4 PowerDesigner \u66F4\u8F7B\u91CF\u7EA7\uFF0C\u4E5F\u66F4\u7B26\u5408\u65E5\u5E38\u7684\u64CD\u4F5C\u4E60\u60EF\uFF0C\u4E3A\u56FD\u4EA7\u5F00\u6E90\u70B9\u8D5E\uFF01</p><p>\u9879\u76EE\u5730\u5740\uFF1A</p>',55),d={href:"https://gitee.com/robergroup/chiner",target:"_blank",rel:"noopener noreferrer"},j=a("https://gitee.com/robergroup/chiner"),l=e("p",null,"\u4F7F\u7528\u624B\u518C\uFF1A",-1),u={href:"https://www.yuque.com/chiner/docs/manual",target:"_blank",rel:"noopener noreferrer"},v=a("https://www.yuque.com/chiner/docs/manual"),_=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png",alt:""})],-1);function f(w,x){const t=p("ExternalLinkIcon");return c(),i("div",null,[s,e("blockquote",null,[e("p",null,[e("a",h,[b,r(t)])])]),m,e("blockquote",null,[e("p",null,[e("a",d,[j,r(t)])])]),l,e("blockquote",null,[e("p",null,[e("a",u,[v,r(t)])])]),_])}var P=o(g,[["render",f],["__file","chiner.html.vue"]]);export{P as default};
diff --git a/dist/assets/choco.html.8857968e.js b/dist/assets/choco.html.2c7d8900.js
similarity index 99%
rename from dist/assets/choco.html.8857968e.js
rename to dist/assets/choco.html.2c7d8900.js
index f8356480..94a1c0ff 100644
--- a/dist/assets/choco.html.8857968e.js
+++ b/dist/assets/choco.html.2c7d8900.js
@@ -1,4 +1,4 @@
-import{_ as l}from"./plugin-vue_export-helper.21dcd24c.js";import{r as i,o as r,c as n,a as e,b as t,e as c,d as o}from"./app.a0271b9c.js";const d={},s=c('<p>\u5C0F\u4E8C\u662F\u516C\u53F8\u65B0\u6765\u7684\u5B9E\u4E60\u751F\uFF0C\u4E4B\u524D\u9762\u8BD5\u7684\u8FC7\u7A0B\u4E2D\u5BF9\u7B54\u5982\u6D41\uFF0C\u6240\u4EE5\u6211\u975E\u5E38\u770B\u597D\u4ED6\u3002\u7B2C\u4E00\u5929\uFF0C\u6211\u7ED9\u4ED6\u4E86\u4E00\u53F0\u65B0\u7535\u8111\uFF0C\u8981\u4ED6\u5148\u5728\u672C\u5730\u642D\u5EFA\u4E2A Java \u5F00\u53D1\u73AF\u5883\u3002</p><p>\u4E8C\u8BDD\u4E0D\u8BF4\uFF0C\u4ED6\u5C31\u5F00\u59CB\u9A6C\u4E0D\u505C\u8E44\u5730\u884C\u52A8\u4E86\u3002<strong>\u771F\u6CA1\u60F3\u5230\uFF0C\u4ED6\u7ADF\u7136\u662F\u901A\u8FC7\u547D\u4EE4\u884C\u7684\u65B9\u5F0F\u5B89\u88C5\u7684 JDK\uFF0C\u4E00\u884C\u547D\u4EE4\u5C31\u641E\u5B9A\u4E86\uFF01\u8FDE\u73AF\u5883\u53D8\u91CF\u90FD\u4E0D\u7528\u914D\u7F6E\uFF0C\u8FD9\u8FDC\u8FDC\u8D85\u51FA\u4E86\u6211\u5BF9\u4ED6\u7684\u9884\u671F</strong>\u3002</p><p>\u6211\u4EE5\u4E3A\uFF0C\u4ED6\u4F1A\u50BB\u4E4E\u4E4E\u5730\u4E0B\u4E00\u6B65\u4E0B\u4E00\u6B65\u6765\u5B89\u88C5 JDK\uFF0C\u5C31\u50CF\u8FD9\u6837\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/choco-9050933d-61f2-4d79-bad7-982803fc174a" alt=""></p><p>\u7136\u540E\u8FD9\u6837\u914D\u7F6E\u73AF\u5883\u53D8\u91CF\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/choco-4adb249c-a662-42af-9c7e-08deeb11c835" alt=""></p><p>\u7ED3\u679C\u4ED6\u662F\u8FD9\u6837\u7684\uFF0C\u5C31\u4E00\u884C\u547D\u4EE4\uFF0C\u73AF\u5883\u53D8\u91CF\u4E5F\u4E0D\u7528\u914D\u7F6E\uFF01</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/choco-5c996f2a-6d14-4f9d-acd4-ff1cf959b55f" alt=""></p><p>\u5367\u69FD\uFF01\u725B\u903C\u9AD8\u5927\u4E0A\u554A\uFF01</p><p>\u770B\u7740\u4ED6\u719F\u7EC3\u5730\u5728\u547D\u4EE4\u884C\u91CC\u5B89\u88C5 JDK \u7684\u6837\u5B50\uFF0C\u6211\u7684\u5634\u89D2\u5F00\u59CB\u5FAE\u5FAE\u4E0A\u626C\uFF0C\u771F\u4E0D\u9519\uFF01\u8FD9\u6B21\u603B\u7B97\u62DB\u5230\u4E86\u4E00\u4E2A\u9760\u8C31\u7684\u3002</p><p>\u4E8E\u662F\u6211\u5C31\u5B89\u6392\u4ED6\u505A\u4E00\u4E2A\u8BB0\u5F55\uFF0C\u6253\u7B97\u53D1\u8868\u5728\u6211\u7684\u5C0F\u7834\u7AD9\u300AJava \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF\u300B\u4E0A\u3002\u4ECE\u4ED6\u5634\u91CC\u4E86\u89E3\u5230\uFF0C\u4ED6\u7528\u7684\u547D\u4EE4\u884C\u8F6F\u4EF6\u7BA1\u7406\u5668\u53EB chocolatey\uFF0C\u8FD9\u662F\u4E00\u4E2AWindows\u4E0B\u7684\u547D\u4EE4\u884C\u8F6F\u4EF6\u7BA1\u7406\u5668\uFF0C\u5728 GitHub \u4E0A\u5DF2\u7ECF\u6536\u83B7 8.2k+\u7684\u661F\u6807\uFF0C\u53EF\u4EE5\u65B9\u4FBF\u5F00\u53D1\u8005\u50CF\u5728Linux\u4E0B\u4F7F\u7528yum\u547D\u4EE4\u6765\u5B89\u88C5\u8F6F\u4EF6\uFF0C\u6216\u8005\u50CF\u5728macOS\u4E0B\u4F7F\u7528brew \u547D\u4EE4\u6765\u5B89\u88C5\u8F6F\u4EF6\uFF0C\u975E\u5E38\u9177\u70AB\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/choco-c598af06-7a85-47ca-ade4-e07c60463990" alt=""></p><p>\u4EE5\u4E0B\u662F\u4ED6\u7684\u8BB0\u5F55\uFF0C\u4E00\u8D77\u6765\u6B23\u8D4F\u4E0B\u3002</p><h3 id="\u5148\u6765\u4E86\u89E3-shell" tabindex="-1"><a class="header-anchor" href="#\u5148\u6765\u4E86\u89E3-shell" aria-hidden="true">#</a> \u5148\u6765\u4E86\u89E3 shell</h3><p>\u5BF9\u4E8E\u4E00\u540D Java \u540E\u7AEF\u7A0B\u5E8F\u5458\u6765\u8BF4\uFF0C\u521D\u5B66\u9636\u6BB5\uFF0C\u4F60\u53EF\u4EE5\u9009\u62E9\u5728 IDE \u4E2D\u76F4\u63A5\u7F16\u8BD1\u8FD0\u884C Java \u4EE3\u7801\uFF0C\u4F46\u6709\u65F6\u5019\u4E5F\u9700\u8981\u5728 Shell \u4E0B\u7F16\u8BD1\u548C\u8FD0\u884C Java \u4EE3\u7801\u3002</p><blockquote><p>Windows \u4E0B\u81EA\u5E26\u7684 Shell \u53EB\u547D\u4EE4\u63D0\u793A\u7B26\uFF0C\u6216\u8005 cmd \u6216\u8005 powershell\uFF0CmacOS \u4E0B\u53EB\u7EC8\u7AEF terminal\u3002</p></blockquote><p>\u4F46\u5F53\u4F60\u9700\u8981\u5728\u751F\u4EA7\u73AF\u5883\u4E0B\u90E8\u7F72 Java\u9879\u76EE\u6216\u8005\u67E5\u770B\u65E5\u5FD7\u7684\u8BDD\uFF0C\u5C31\u5FC5\u7136\u4F1A\u7528\u5230 Shell\uFF0C\u8FD9\u4E2A\u9636\u6BB5\uFF0CShell \u7684\u4F7F\u7528\u9891\u7387\u9AD8\u5230\u53EF\u4EE5\u7528\u4E00\u4E2A\u6210\u8BED\u6765\u5F62\u5BB9\u2014\u2014\u671D\u5915\u76F8\u4F34\u3002</p><p>\u4E00\u4E9B\u7B2C\u4E09\u65B9\u8F6F\u4EF6\u4F1A\u5728\u539F\u751F\u7684 Shell \u57FA\u7840\u4E0A\u63D0\u4F9B\u66F4\u5F3A\u5927\u7684\u529F\u80FD\uFF0C\u5E38\u89C1\u7684\u6709 tabby\u3001Warp\u3001xhsell\u3001FinalShell\u3001MobaXterm\u3001Aechoterm\u3001WindTerm\u3001termius\u3001iterm2 \u7B49\u7B49\uFF0C\u6709\u4E9B\u53EA\u80FD\u5728 Windows \u4E0A\u4F7F\u7528\uFF0C\u6709\u4E9B\u53EA\u80FD\u5728 macOS \u4E0A\u4F7F\u7528\uFF0C\u6709\u4E9B\u652F\u6301\u5168\u5E73\u53F0\u3002\u8FD8\u6709 ohmyzsh \u8FD9\u79CD\u8D85\u795E\u7684 Shell \u7F8E\u5316\u5DE5\u5177\u3002</p><p>\u8FD9\u91CC\uFF0C\u6211\u4EEC\u5217\u4E3E\u4E00\u4E9B Shell \u7684\u57FA\u672C\u64CD\u4F5C\u547D\u4EE4\uFF08Windows \u548C macOS/Linux \u6709\u4E9B\u8BB8\u5DEE\u5F02\uFF09\uFF1A</p><ul><li>\u5207\u6362\u76EE\u5F55\uFF0C\u53EF\u4EE5\u4F7F\u7528 cd \u547D\u4EE4\u5207\u6362\u76EE\u5F55\uFF0C<code>cd ..</code> \u8FD4\u56DE\u4E0A\u7EA7\u76EE\u5F55\u3002</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/choco-b329cba9-4982-44ec-9935-3c9eb5b92eab" alt=""></p><ul><li>\u76EE\u5F55\u5217\u8868\uFF0Cmacos/linux \u4E0B\u53EF\u4EE5\u4F7F\u7528 ls \u547D\u4EE4\u5217\u51FA\u76EE\u5F55\u4E0B\u6240\u6709\u7684\u6587\u4EF6\u548C\u5B50\u76EE\u5F55\uFF08Windows \u4E0B\u4F7F\u7528 dir \u547D\u4EE4\uFF09\uFF0C\u4F7F\u7528\u901A\u914D\u7B26 <code>*</code> \u5BF9\u5C55\u793A\u7684\u5185\u5BB9\u8FDB\u884C\u8FC7\u6EE4\uFF0C\u6BD4\u5982 <code>ls *.java</code> \u5217\u51FA\u6240\u6709 <code>.java</code>\u540E\u7F00\u7684\u6587\u4EF6\uFF0C\u5982\u679C\u60F3\u66F4\u8FDB\u4E00\u6B65\u7684\u8BDD\uFF0C\u53EF\u4EE5\u4F7F\u7528 <code>ls H*.java</code> \u5217\u51FA\u6240\u6709\u4EE5 H \u5F00\u5934 <code>.java</code> \u540E\u7F00\u7684\u6587\u4EF6\u3002</li><li>\u65B0\u5EFA\u76EE\u5F55\uFF0CmacOS/Linux \u4E0B\u53EF\u4EE5\u4F7F\u7528 mkdir \u547D\u4EE4\u65B0\u5EFA\u4E00\u4E2A\u76EE\u5F55\uFF08\u6BD4\u5982 <code>mkdir hello</code> \u53EF\u4EE5\u65B0\u5EFA\u4E00\u4E2A hello \u7684\u76EE\u5F55\uFF09\uFF0CWindows \u4E0B\u53EF\u4EE5\u4F7F\u7528 md \u547D\u4EE4\u3002</li><li>\u5220\u9664\u6587\u4EF6\uFF0CmacOS/Linux \u4E0B\u53EF\u4EE5\u4F7F\u7528 <code>rm</code> \u547D\u4EE4\u5220\u9664\u6587\u4EF6\uFF08\u6BD4\u5982 <code>rm hello.java</code> \u5220\u9664 hello.java \u6587\u4EF6\uFF09\uFF0CWindows \u4E0B\u53EF\u4EE5\u4F7F\u7528 del \u547D\u4EE4\u3002</li><li>\u5220\u9664\u76EE\u5F55\uFF0CmacOS/Linux \u4E0B\u53EF\u4EE5\u4F7F\u7528 <code>rm -r</code> \u547D\u4EE4\u5220\u9664\u76EE\u5F55\u4EE5\u53CA\u5B83\u6240\u5305\u542B\u7684\u6240\u6709\u6587\u4EF6\uFF08\u6BD4\u5982\u8BF4 <code>rm -r hello</code> \u5220\u9664 hello \u76EE\u5F55\uFF09\u3002Windows \u4E0B\u53EF\u4EE5\u4F7F\u7528 deltree \u547D\u4EE4\u3002</li><li>\u91CD\u590D\u547D\u4EE4\uFF0CmacOS/Linux/Windows \u4E0B\u90FD\u53EF\u4EE5\u4F7F\u7528\u4E0A\u4E0B\u7BAD\u5934\u6765\u9009\u62E9\u4EE5\u5F80\u6267\u884C\u8FC7\u7684\u547D\u4EE4\u3002</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/choco-bdd0a107-512d-4906-9555-38fe06d24d5a" alt=""></p><ul><li>\u547D\u4EE4\u5386\u53F2\uFF0CmacOS/Linux \u4E0B\u53EF\u4EE5\u4F7F\u7528 <code>history</code> \u547D\u4EE4\u67E5\u770B\u6240\u6709\u4F7F\u7528\u8FC7\u7684\u547D\u4EE4\u3002Windows \u53EF\u4EE5\u6309\u4E0B F7 \u952E\u3002</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/choco-d6425fe6-1501-412e-9642-990864e6f810" alt=""></p><ul><li>\u89E3\u538B\u6587\u4EF6\uFF0C\u540E\u7F00\u540D\u4E3A\u201C.zip\u201D\u7684\u6587\u4EF6\u662F\u4E00\u4E2A\u5305\u542B\u4E86\u5176\u4ED6\u6587\u4EF6\u7684\u538B\u7F29\u5305\uFF0CmacOS/Linux \u7CFB\u7EDF\u81EA\u8EAB\u5DF2\u7ECF\u63D0\u4F9B\u4E86\u7528\u4E8E\u89E3\u538B\u7684 unzip \u547D\u4EE4\uFF0C Windows \u7684\u8BDD\u9700\u8981\u624B\u52A8\u5B89\u88C5\u3002</li></ul><h3 id="\u518D\u6765\u4E86\u89E3chocolatey" tabindex="-1"><a class="header-anchor" href="#\u518D\u6765\u4E86\u89E3chocolatey" aria-hidden="true">#</a> \u518D\u6765\u4E86\u89E3chocolatey</h3><p>\u5148\u5B89\u88C5 chocolatey\u3002\u8FD9\u662F\u4E00\u4E2AWindows\u4E0B\u7684\u547D\u4EE4\u884C\u8F6F\u4EF6\u7BA1\u7406\u5668\uFF0C\u53EF\u4EE5\u65B9\u4FBF\u5F00\u53D1\u8005\u50CF\u5728Linux\u4E0B\u4F7F\u7528yum\u547D\u4EE4\u6765\u5B89\u88C5\u8F6F\u4EF6\uFF0C\u6216\u8005\u50CF\u5728macOS\u4E0B\u4F7F\u7528brew \u547D\u4EE4\u6765\u5B89\u88C5\u8F6F\u4EF6\uFF0C\u975E\u5E38\u9177\u70AB\u3002</p><blockquote><p>The biggest challenge is reducing duplication of effort, so users turn to Chocolatey for simplicity</p></blockquote><p>\u4F20\u7EDF\u7684\u5B89\u88C5\u65B9\u5F0F\u8981\u4E48\u975E\u5E38\u8017\u65F6\uFF0C\u8981\u4E48\u975E\u5E38\u4F4E\u6548\uFF0C\u5728\u547D\u4EE4\u884C\u5B89\u88C5\u8F6F\u4EF6\u9664\u4E86\u7B80\u5355\u9AD8\u6548\uFF0C\u8FD8\u80FD\u81EA\u52A8\u5E2E\u6211\u4EEC\u914D\u7F6E\u73AF\u5883\u53D8\u91CF\u3002</p>',30),p=o("\u5B98\u65B9\u5730\u5740\uFF1A"),h={href:"https://chocolatey.org/",target:"_blank",rel:"noopener noreferrer"},b=o("https://chocolatey.org/"),m=o("\u5B89\u88C5\u6587\u6863\uFF1A"),g={href:"https://chocolatey.org/install#individual",target:"_blank",rel:"noopener noreferrer"},u=o("https://chocolatey.org/install#individual"),v=c(`<p>\u7B2C\u4E00\u6B65\uFF0C\u4EE5\u7BA1\u7406\u5458\u7684\u8EAB\u4EFD\u6253\u5F00 cmd \u547D\u4EE4\u884C\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/choco-f01fb23b-9ca5-4997-acc3-26ebd7da060f" alt=""></p><p>\u7B2C\u4E8C\u6B65\uFF0C\u6267\u884C\u4EE5\u4E0B\u547D\u4EE4\uFF1A</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>Set-ExecutionPolicy Bypass -Scope Process -Force; [System.Net.ServicePointManager]::SecurityProtocol = [System.Net.ServicePointManager]::SecurityProtocol -bor 3072; iex ((New-Object System.Net.WebClient).DownloadString(&#39;https://community.chocolatey.org/install.ps1&#39;))
+import{_ as l}from"./plugin-vue_export-helper.21dcd24c.js";import{r as i,o as r,c as n,a as e,b as t,e as c,d as o}from"./app.615e41d8.js";const d={},s=c('<p>\u5C0F\u4E8C\u662F\u516C\u53F8\u65B0\u6765\u7684\u5B9E\u4E60\u751F\uFF0C\u4E4B\u524D\u9762\u8BD5\u7684\u8FC7\u7A0B\u4E2D\u5BF9\u7B54\u5982\u6D41\uFF0C\u6240\u4EE5\u6211\u975E\u5E38\u770B\u597D\u4ED6\u3002\u7B2C\u4E00\u5929\uFF0C\u6211\u7ED9\u4ED6\u4E86\u4E00\u53F0\u65B0\u7535\u8111\uFF0C\u8981\u4ED6\u5148\u5728\u672C\u5730\u642D\u5EFA\u4E2A Java \u5F00\u53D1\u73AF\u5883\u3002</p><p>\u4E8C\u8BDD\u4E0D\u8BF4\uFF0C\u4ED6\u5C31\u5F00\u59CB\u9A6C\u4E0D\u505C\u8E44\u5730\u884C\u52A8\u4E86\u3002<strong>\u771F\u6CA1\u60F3\u5230\uFF0C\u4ED6\u7ADF\u7136\u662F\u901A\u8FC7\u547D\u4EE4\u884C\u7684\u65B9\u5F0F\u5B89\u88C5\u7684 JDK\uFF0C\u4E00\u884C\u547D\u4EE4\u5C31\u641E\u5B9A\u4E86\uFF01\u8FDE\u73AF\u5883\u53D8\u91CF\u90FD\u4E0D\u7528\u914D\u7F6E\uFF0C\u8FD9\u8FDC\u8FDC\u8D85\u51FA\u4E86\u6211\u5BF9\u4ED6\u7684\u9884\u671F</strong>\u3002</p><p>\u6211\u4EE5\u4E3A\uFF0C\u4ED6\u4F1A\u50BB\u4E4E\u4E4E\u5730\u4E0B\u4E00\u6B65\u4E0B\u4E00\u6B65\u6765\u5B89\u88C5 JDK\uFF0C\u5C31\u50CF\u8FD9\u6837\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/choco-9050933d-61f2-4d79-bad7-982803fc174a" alt=""></p><p>\u7136\u540E\u8FD9\u6837\u914D\u7F6E\u73AF\u5883\u53D8\u91CF\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/choco-4adb249c-a662-42af-9c7e-08deeb11c835" alt=""></p><p>\u7ED3\u679C\u4ED6\u662F\u8FD9\u6837\u7684\uFF0C\u5C31\u4E00\u884C\u547D\u4EE4\uFF0C\u73AF\u5883\u53D8\u91CF\u4E5F\u4E0D\u7528\u914D\u7F6E\uFF01</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/choco-5c996f2a-6d14-4f9d-acd4-ff1cf959b55f" alt=""></p><p>\u5367\u69FD\uFF01\u725B\u903C\u9AD8\u5927\u4E0A\u554A\uFF01</p><p>\u770B\u7740\u4ED6\u719F\u7EC3\u5730\u5728\u547D\u4EE4\u884C\u91CC\u5B89\u88C5 JDK \u7684\u6837\u5B50\uFF0C\u6211\u7684\u5634\u89D2\u5F00\u59CB\u5FAE\u5FAE\u4E0A\u626C\uFF0C\u771F\u4E0D\u9519\uFF01\u8FD9\u6B21\u603B\u7B97\u62DB\u5230\u4E86\u4E00\u4E2A\u9760\u8C31\u7684\u3002</p><p>\u4E8E\u662F\u6211\u5C31\u5B89\u6392\u4ED6\u505A\u4E00\u4E2A\u8BB0\u5F55\uFF0C\u6253\u7B97\u53D1\u8868\u5728\u6211\u7684\u5C0F\u7834\u7AD9\u300AJava \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF\u300B\u4E0A\u3002\u4ECE\u4ED6\u5634\u91CC\u4E86\u89E3\u5230\uFF0C\u4ED6\u7528\u7684\u547D\u4EE4\u884C\u8F6F\u4EF6\u7BA1\u7406\u5668\u53EB chocolatey\uFF0C\u8FD9\u662F\u4E00\u4E2AWindows\u4E0B\u7684\u547D\u4EE4\u884C\u8F6F\u4EF6\u7BA1\u7406\u5668\uFF0C\u5728 GitHub \u4E0A\u5DF2\u7ECF\u6536\u83B7 8.2k+\u7684\u661F\u6807\uFF0C\u53EF\u4EE5\u65B9\u4FBF\u5F00\u53D1\u8005\u50CF\u5728Linux\u4E0B\u4F7F\u7528yum\u547D\u4EE4\u6765\u5B89\u88C5\u8F6F\u4EF6\uFF0C\u6216\u8005\u50CF\u5728macOS\u4E0B\u4F7F\u7528brew \u547D\u4EE4\u6765\u5B89\u88C5\u8F6F\u4EF6\uFF0C\u975E\u5E38\u9177\u70AB\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/choco-c598af06-7a85-47ca-ade4-e07c60463990" alt=""></p><p>\u4EE5\u4E0B\u662F\u4ED6\u7684\u8BB0\u5F55\uFF0C\u4E00\u8D77\u6765\u6B23\u8D4F\u4E0B\u3002</p><h3 id="\u5148\u6765\u4E86\u89E3-shell" tabindex="-1"><a class="header-anchor" href="#\u5148\u6765\u4E86\u89E3-shell" aria-hidden="true">#</a> \u5148\u6765\u4E86\u89E3 shell</h3><p>\u5BF9\u4E8E\u4E00\u540D Java \u540E\u7AEF\u7A0B\u5E8F\u5458\u6765\u8BF4\uFF0C\u521D\u5B66\u9636\u6BB5\uFF0C\u4F60\u53EF\u4EE5\u9009\u62E9\u5728 IDE \u4E2D\u76F4\u63A5\u7F16\u8BD1\u8FD0\u884C Java \u4EE3\u7801\uFF0C\u4F46\u6709\u65F6\u5019\u4E5F\u9700\u8981\u5728 Shell \u4E0B\u7F16\u8BD1\u548C\u8FD0\u884C Java \u4EE3\u7801\u3002</p><blockquote><p>Windows \u4E0B\u81EA\u5E26\u7684 Shell \u53EB\u547D\u4EE4\u63D0\u793A\u7B26\uFF0C\u6216\u8005 cmd \u6216\u8005 powershell\uFF0CmacOS \u4E0B\u53EB\u7EC8\u7AEF terminal\u3002</p></blockquote><p>\u4F46\u5F53\u4F60\u9700\u8981\u5728\u751F\u4EA7\u73AF\u5883\u4E0B\u90E8\u7F72 Java\u9879\u76EE\u6216\u8005\u67E5\u770B\u65E5\u5FD7\u7684\u8BDD\uFF0C\u5C31\u5FC5\u7136\u4F1A\u7528\u5230 Shell\uFF0C\u8FD9\u4E2A\u9636\u6BB5\uFF0CShell \u7684\u4F7F\u7528\u9891\u7387\u9AD8\u5230\u53EF\u4EE5\u7528\u4E00\u4E2A\u6210\u8BED\u6765\u5F62\u5BB9\u2014\u2014\u671D\u5915\u76F8\u4F34\u3002</p><p>\u4E00\u4E9B\u7B2C\u4E09\u65B9\u8F6F\u4EF6\u4F1A\u5728\u539F\u751F\u7684 Shell \u57FA\u7840\u4E0A\u63D0\u4F9B\u66F4\u5F3A\u5927\u7684\u529F\u80FD\uFF0C\u5E38\u89C1\u7684\u6709 tabby\u3001Warp\u3001xhsell\u3001FinalShell\u3001MobaXterm\u3001Aechoterm\u3001WindTerm\u3001termius\u3001iterm2 \u7B49\u7B49\uFF0C\u6709\u4E9B\u53EA\u80FD\u5728 Windows \u4E0A\u4F7F\u7528\uFF0C\u6709\u4E9B\u53EA\u80FD\u5728 macOS \u4E0A\u4F7F\u7528\uFF0C\u6709\u4E9B\u652F\u6301\u5168\u5E73\u53F0\u3002\u8FD8\u6709 ohmyzsh \u8FD9\u79CD\u8D85\u795E\u7684 Shell \u7F8E\u5316\u5DE5\u5177\u3002</p><p>\u8FD9\u91CC\uFF0C\u6211\u4EEC\u5217\u4E3E\u4E00\u4E9B Shell \u7684\u57FA\u672C\u64CD\u4F5C\u547D\u4EE4\uFF08Windows \u548C macOS/Linux \u6709\u4E9B\u8BB8\u5DEE\u5F02\uFF09\uFF1A</p><ul><li>\u5207\u6362\u76EE\u5F55\uFF0C\u53EF\u4EE5\u4F7F\u7528 cd \u547D\u4EE4\u5207\u6362\u76EE\u5F55\uFF0C<code>cd ..</code> \u8FD4\u56DE\u4E0A\u7EA7\u76EE\u5F55\u3002</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/choco-b329cba9-4982-44ec-9935-3c9eb5b92eab" alt=""></p><ul><li>\u76EE\u5F55\u5217\u8868\uFF0Cmacos/linux \u4E0B\u53EF\u4EE5\u4F7F\u7528 ls \u547D\u4EE4\u5217\u51FA\u76EE\u5F55\u4E0B\u6240\u6709\u7684\u6587\u4EF6\u548C\u5B50\u76EE\u5F55\uFF08Windows \u4E0B\u4F7F\u7528 dir \u547D\u4EE4\uFF09\uFF0C\u4F7F\u7528\u901A\u914D\u7B26 <code>*</code> \u5BF9\u5C55\u793A\u7684\u5185\u5BB9\u8FDB\u884C\u8FC7\u6EE4\uFF0C\u6BD4\u5982 <code>ls *.java</code> \u5217\u51FA\u6240\u6709 <code>.java</code>\u540E\u7F00\u7684\u6587\u4EF6\uFF0C\u5982\u679C\u60F3\u66F4\u8FDB\u4E00\u6B65\u7684\u8BDD\uFF0C\u53EF\u4EE5\u4F7F\u7528 <code>ls H*.java</code> \u5217\u51FA\u6240\u6709\u4EE5 H \u5F00\u5934 <code>.java</code> \u540E\u7F00\u7684\u6587\u4EF6\u3002</li><li>\u65B0\u5EFA\u76EE\u5F55\uFF0CmacOS/Linux \u4E0B\u53EF\u4EE5\u4F7F\u7528 mkdir \u547D\u4EE4\u65B0\u5EFA\u4E00\u4E2A\u76EE\u5F55\uFF08\u6BD4\u5982 <code>mkdir hello</code> \u53EF\u4EE5\u65B0\u5EFA\u4E00\u4E2A hello \u7684\u76EE\u5F55\uFF09\uFF0CWindows \u4E0B\u53EF\u4EE5\u4F7F\u7528 md \u547D\u4EE4\u3002</li><li>\u5220\u9664\u6587\u4EF6\uFF0CmacOS/Linux \u4E0B\u53EF\u4EE5\u4F7F\u7528 <code>rm</code> \u547D\u4EE4\u5220\u9664\u6587\u4EF6\uFF08\u6BD4\u5982 <code>rm hello.java</code> \u5220\u9664 hello.java \u6587\u4EF6\uFF09\uFF0CWindows \u4E0B\u53EF\u4EE5\u4F7F\u7528 del \u547D\u4EE4\u3002</li><li>\u5220\u9664\u76EE\u5F55\uFF0CmacOS/Linux \u4E0B\u53EF\u4EE5\u4F7F\u7528 <code>rm -r</code> \u547D\u4EE4\u5220\u9664\u76EE\u5F55\u4EE5\u53CA\u5B83\u6240\u5305\u542B\u7684\u6240\u6709\u6587\u4EF6\uFF08\u6BD4\u5982\u8BF4 <code>rm -r hello</code> \u5220\u9664 hello \u76EE\u5F55\uFF09\u3002Windows \u4E0B\u53EF\u4EE5\u4F7F\u7528 deltree \u547D\u4EE4\u3002</li><li>\u91CD\u590D\u547D\u4EE4\uFF0CmacOS/Linux/Windows \u4E0B\u90FD\u53EF\u4EE5\u4F7F\u7528\u4E0A\u4E0B\u7BAD\u5934\u6765\u9009\u62E9\u4EE5\u5F80\u6267\u884C\u8FC7\u7684\u547D\u4EE4\u3002</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/choco-bdd0a107-512d-4906-9555-38fe06d24d5a" alt=""></p><ul><li>\u547D\u4EE4\u5386\u53F2\uFF0CmacOS/Linux \u4E0B\u53EF\u4EE5\u4F7F\u7528 <code>history</code> \u547D\u4EE4\u67E5\u770B\u6240\u6709\u4F7F\u7528\u8FC7\u7684\u547D\u4EE4\u3002Windows \u53EF\u4EE5\u6309\u4E0B F7 \u952E\u3002</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/choco-d6425fe6-1501-412e-9642-990864e6f810" alt=""></p><ul><li>\u89E3\u538B\u6587\u4EF6\uFF0C\u540E\u7F00\u540D\u4E3A\u201C.zip\u201D\u7684\u6587\u4EF6\u662F\u4E00\u4E2A\u5305\u542B\u4E86\u5176\u4ED6\u6587\u4EF6\u7684\u538B\u7F29\u5305\uFF0CmacOS/Linux \u7CFB\u7EDF\u81EA\u8EAB\u5DF2\u7ECF\u63D0\u4F9B\u4E86\u7528\u4E8E\u89E3\u538B\u7684 unzip \u547D\u4EE4\uFF0C Windows \u7684\u8BDD\u9700\u8981\u624B\u52A8\u5B89\u88C5\u3002</li></ul><h3 id="\u518D\u6765\u4E86\u89E3chocolatey" tabindex="-1"><a class="header-anchor" href="#\u518D\u6765\u4E86\u89E3chocolatey" aria-hidden="true">#</a> \u518D\u6765\u4E86\u89E3chocolatey</h3><p>\u5148\u5B89\u88C5 chocolatey\u3002\u8FD9\u662F\u4E00\u4E2AWindows\u4E0B\u7684\u547D\u4EE4\u884C\u8F6F\u4EF6\u7BA1\u7406\u5668\uFF0C\u53EF\u4EE5\u65B9\u4FBF\u5F00\u53D1\u8005\u50CF\u5728Linux\u4E0B\u4F7F\u7528yum\u547D\u4EE4\u6765\u5B89\u88C5\u8F6F\u4EF6\uFF0C\u6216\u8005\u50CF\u5728macOS\u4E0B\u4F7F\u7528brew \u547D\u4EE4\u6765\u5B89\u88C5\u8F6F\u4EF6\uFF0C\u975E\u5E38\u9177\u70AB\u3002</p><blockquote><p>The biggest challenge is reducing duplication of effort, so users turn to Chocolatey for simplicity</p></blockquote><p>\u4F20\u7EDF\u7684\u5B89\u88C5\u65B9\u5F0F\u8981\u4E48\u975E\u5E38\u8017\u65F6\uFF0C\u8981\u4E48\u975E\u5E38\u4F4E\u6548\uFF0C\u5728\u547D\u4EE4\u884C\u5B89\u88C5\u8F6F\u4EF6\u9664\u4E86\u7B80\u5355\u9AD8\u6548\uFF0C\u8FD8\u80FD\u81EA\u52A8\u5E2E\u6211\u4EEC\u914D\u7F6E\u73AF\u5883\u53D8\u91CF\u3002</p>',30),p=o("\u5B98\u65B9\u5730\u5740\uFF1A"),h={href:"https://chocolatey.org/",target:"_blank",rel:"noopener noreferrer"},b=o("https://chocolatey.org/"),m=o("\u5B89\u88C5\u6587\u6863\uFF1A"),g={href:"https://chocolatey.org/install#individual",target:"_blank",rel:"noopener noreferrer"},u=o("https://chocolatey.org/install#individual"),v=c(`<p>\u7B2C\u4E00\u6B65\uFF0C\u4EE5\u7BA1\u7406\u5458\u7684\u8EAB\u4EFD\u6253\u5F00 cmd \u547D\u4EE4\u884C\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/choco-f01fb23b-9ca5-4997-acc3-26ebd7da060f" alt=""></p><p>\u7B2C\u4E8C\u6B65\uFF0C\u6267\u884C\u4EE5\u4E0B\u547D\u4EE4\uFF1A</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>Set-ExecutionPolicy Bypass -Scope Process -Force; [System.Net.ServicePointManager]::SecurityProtocol = [System.Net.ServicePointManager]::SecurityProtocol -bor 3072; iex ((New-Object System.Net.WebClient).DownloadString(&#39;https://community.chocolatey.org/install.ps1&#39;))
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>\u7A0D\u7B49\u7247\u523B\uFF0C\u5C31\u5B8C\u6210\u5B89\u88C5\u4E86\u3002</p><p>\u5B89\u88C5\u5B8C\u6210\u540E\u5982\u4E0B\u56FE\u6240\u793A\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/choco-e9696a71-ceb5-4c62-b39f-876f742b6435" alt=""></p><p>\u5982\u679C\u4E0D\u786E\u5B9A\u662F\u5426\u5B89\u88C5\u6210\u529F\u7684\u8BDD\uFF0C\u53EF\u4EE5\u901A\u8FC7\u952E\u5165 <code>choco</code> \u547D\u4EE4\u6765\u786E\u8BA4\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/choco-211a2335-d3e1-49b5-8735-feabacf8087e" alt=""></p><p>\u8FD9\u91CC\u63A8\u8350\u51E0\u4E2A\u975E\u5E38\u9AD8\u6548\u7684\u64CD\u4F5C\u547D\u4EE4\uFF1A</p><ul><li>choco search xxx\uFF0C\u67E5\u627E xxx \u5B89\u88C5\u5305</li><li>choco info xxx\uFF0C\u67E5\u770B xxx \u5B89\u88C5\u5305\u4FE1\u606F</li><li>choco install xxx\uFF0C\u5B89\u88C5 xxx \u8F6F\u4EF6</li><li>choco upgrade xxx\uFF0C\u5347\u7EA7 xxx \u8F6F\u4EF6</li><li>choco uninstall xxx\uFF0C \u5378\u8F7D xxx \u8F6F\u4EF6</li></ul><p>\u5982\u4F55\u77E5\u9053 chocolatey \u4ED3\u5E93\u4E2D\u90FD\u6709\u54EA\u4E9B\u5B89\u88C5\u5305\u53EF\u7528\u5462\uFF1F</p><p>\u53EF\u4EE5\u901A\u8FC7\u4E0A\u9762\u63D0\u5230\u7684\u547D\u4EE4\u884C\u7684\u65B9\u5F0F\uFF0C\u4E5F\u53EF\u4EE5\u8BBF\u95EE\u5B98\u65B9\u4ED3\u5E93\u8FDB\u884C\u7B5B\u9009\u3002</p>`,13),x={href:"https://community.chocolatey.org/packages",target:"_blank",rel:"noopener noreferrer"},j=o("https://community.chocolatey.org/packages"),f=c(`<p>\u6BD4\u5982\u8BF4\u6211\u4EEC\u6765\u67E5\u627E Java\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/choco-a4bdc885-22a9-4307-b4b6-cd1ad1f0ba8b" alt=""></p><p>\u597D\uFF0C\u73B0\u5728\u53EF\u4EE5\u76F4\u63A5\u5728shell\u4E2D\u952E\u5165 <code>choco install jdk8</code> \u6765\u5B89\u88C5 JDK8 \u4E86\uFF0C\u5E76\u4E14\u4F1A\u81EA\u52A8\u5C06Java\u52A0\u5165\u5230\u73AF\u5883\u53D8\u91CF\u4E2D\uFF0C\u4E0D\u7528\u518D\u53BB\u300C\u6211\u7684\u7535\u8111\u300D\u300C\u73AF\u5883\u53D8\u91CF\u300D\u4E2D\u65B0\u5EFA JAVA_HOME \u5E76\u590D\u5236 JDK \u5B89\u88C5\u8DEF\u5F84\u914D\u7F6E PATH \u53D8\u91CF\u4E86\uFF0C\u662F\u4E0D\u662F\u975E\u5E38 nice\uFF1F</p><p>\u7A0D\u7B49\u7247\u523B\uFF0C\u952E\u5165 <code>java -version</code> \u5C31\u53EF\u4EE5\u786E\u8BA4Java\u662F\u5426\u5B89\u88C5\u6210\u529F\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/choco-80a6ced8-c25d-4371-8096-b95be48af768" alt=""></p><p>\u4E0D\u5F97\u4E0D\u627F\u8BA4\uFF01\u975E\u5E38nice\uFF01</p><p>\u518D\u6BD4\u5982\u8BF4\u5B89\u88C5 Redis\uFF0C\u53EA\u9700\u8981\u627E\u5230 Redis \u7684\u5B89\u88C5\u547D\u4EE4\u5728 Choco \u4E0B\u6267\u884C\u4E00\u4E0B\u5C31 OK \u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/choco-488b71e7-8082-45b7-b454-3187938bf101" alt=""></p><p>\u5B89\u88C5 Git\uFF1A</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>choco install git.install 
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>\u5B89\u88C5 node.js</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>choco install nodejs.install 
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>\u5B89\u88C5 7zip</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>choco install 7zip
diff --git a/dist/assets/class-file-jiegou.html.63f6ec81.js b/dist/assets/class-file-jiegou.html.3aa9524b.js
similarity index 99%
rename from dist/assets/class-file-jiegou.html.63f6ec81.js
rename to dist/assets/class-file-jiegou.html.3aa9524b.js
index c2dddd42..dcd8459b 100644
--- a/dist/assets/class-file-jiegou.html.63f6ec81.js
+++ b/dist/assets/class-file-jiegou.html.3aa9524b.js
@@ -1,4 +1,4 @@
-import{_ as a}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as n,e}from"./app.a0271b9c.js";const t={},c=e(`<h1 id="\u8BE6\u89E3java\u7684\u7C7B\u6587\u4EF6-class\u6587\u4EF6-\u7ED3\u6784" tabindex="-1"><a class="header-anchor" href="#\u8BE6\u89E3java\u7684\u7C7B\u6587\u4EF6-class\u6587\u4EF6-\u7ED3\u6784" aria-hidden="true">#</a> \u8BE6\u89E3Java\u7684\u7C7B\u6587\u4EF6\uFF08class\u6587\u4EF6\uFF09\u7ED3\u6784</h1><p>\u5927\u5BB6\u597D\uFF0C\u6211\u662F\u4E8C\u54E5\u5440\uFF0C\u4ECA\u5929\u6211\u62FF\u4E86\u4E00\u628A\u5C0F\u5200\uFF0C\u51C6\u5907\u89E3\u5256\u4E00\u4E0B Java \u7684 class \u6587\u4EF6\u3002</p><p>CS \u7684\u4E16\u754C\u91CC\u6D41\u884C\u7740\u8FD9\u4E48\u4E00\u53E5\u8BDD\uFF0C\u201C\u8BA1\u7B97\u673A\u79D1\u5B66\u9886\u57DF\u7684\u4EFB\u4F55\u95EE\u9898\u90FD\u53EF\u4EE5\u901A\u8FC7\u589E\u52A0\u4E00\u4E2A\u4E2D\u95F4\u5C42\u6765\u89E3\u51B3\u201D\u3002\u5BF9\u4E8E Java \u6765\u8BF4\uFF0CJVM \u5C31\u662F\u8FD9\u4E48\u4E00\u4E2A\u4EA7\u7269\uFF0C\u201CWrite once, Run anywhere\u201D\u4E4B\u6240\u4EE5\u80FD\u5B9E\u73B0\uFF0C\u9760\u5F97\u5C31\u662F JVM\uFF0C\u5B83\u80FD\u5728\u4E0D\u540C\u7684\u64CD\u4F5C\u7CFB\u7EDF\u4E0B\u8FD0\u884C\u540C\u4E00\u4EFD\u6E90\u4EE3\u7801\u7F16\u8BD1\u540E\u7684 class \u6587\u4EF6\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/class-file-jiegou-dfd7ce0d-1da2-4547-b2d7-57e0350f5911.png" alt=""></p><p>Java \u662F\u8DE8\u5E73\u53F0\u7684\uFF0CJVM \u4F5C\u4E3A\u4E2D\u95F4\u5C42\uFF0C\u81EA\u7136\u8981\u9488\u5BF9\u4E0D\u540C\u7684\u64CD\u4F5C\u7CFB\u7EDF\u63D0\u4F9B\u4E0D\u540C\u7684\u5B9E\u73B0\u3002\u62FF JDK 11 \u6765\u8BF4\uFF0C\u5B83\u7684\u5B9E\u73B0\u5C31\u6709\u4E0A\u56FE\u4E2D\u63D0\u5230\u7684\u8FD9\u4E48\u591A\u79CD\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/class-file-jiegou-b1386f9e-c69b-44b0-a8d0-69ffbe9ed31f.png" alt=""></p><p>\u901A\u8FC7\u4E0D\u540C\u64CD\u4F5C\u7CFB\u7EDF\u7684 JVM\uFF0C\u6211\u4EEC\u7684\u6E90\u4EE3\u7801\u5C31\u53EF\u4EE5\u4E0D\u7528\u6839\u636E\u4E0D\u540C\u7684\u64CD\u4F5C\u7CFB\u7EDF\u7F16\u8BD1\u6210\u4E0D\u540C\u7684\u4E8C\u8FDB\u5236\u53EF\u6267\u884C\u6587\u4EF6\u4E86\uFF0C\u8DE8\u5E73\u53F0\u7684\u76EE\u6807\u4E5F\u5C31\u5B9E\u73B0\u4E86\u3002\u90A3\u8FD9\u4E2A class \u6587\u4EF6\u5230\u5E95\u662F\u4EC0\u4E48\u73A9\u610F\u5462\uFF1F\u5B83\u662F\u600E\u4E48\u88AB JVM \u8BC6\u522B\u7684\u5462\uFF1F</p><p>\u6211\u4EEC\u7528 IDEA \u7F16\u5199\u4E00\u6BB5\u7B80\u5355\u7684 Java \u4EE3\u7801\uFF0C\u6587\u4EF6\u540D\u4E3A Hello.java\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">package</span> <span class="token namespace">com<span class="token punctuation">.</span>itwanger<span class="token punctuation">.</span>jvm</span><span class="token punctuation">;</span>
+import{_ as a}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as n,e}from"./app.615e41d8.js";const t={},c=e(`<h1 id="\u8BE6\u89E3java\u7684\u7C7B\u6587\u4EF6-class\u6587\u4EF6-\u7ED3\u6784" tabindex="-1"><a class="header-anchor" href="#\u8BE6\u89E3java\u7684\u7C7B\u6587\u4EF6-class\u6587\u4EF6-\u7ED3\u6784" aria-hidden="true">#</a> \u8BE6\u89E3Java\u7684\u7C7B\u6587\u4EF6\uFF08class\u6587\u4EF6\uFF09\u7ED3\u6784</h1><p>\u5927\u5BB6\u597D\uFF0C\u6211\u662F\u4E8C\u54E5\u5440\uFF0C\u4ECA\u5929\u6211\u62FF\u4E86\u4E00\u628A\u5C0F\u5200\uFF0C\u51C6\u5907\u89E3\u5256\u4E00\u4E0B Java \u7684 class \u6587\u4EF6\u3002</p><p>CS \u7684\u4E16\u754C\u91CC\u6D41\u884C\u7740\u8FD9\u4E48\u4E00\u53E5\u8BDD\uFF0C\u201C\u8BA1\u7B97\u673A\u79D1\u5B66\u9886\u57DF\u7684\u4EFB\u4F55\u95EE\u9898\u90FD\u53EF\u4EE5\u901A\u8FC7\u589E\u52A0\u4E00\u4E2A\u4E2D\u95F4\u5C42\u6765\u89E3\u51B3\u201D\u3002\u5BF9\u4E8E Java \u6765\u8BF4\uFF0CJVM \u5C31\u662F\u8FD9\u4E48\u4E00\u4E2A\u4EA7\u7269\uFF0C\u201CWrite once, Run anywhere\u201D\u4E4B\u6240\u4EE5\u80FD\u5B9E\u73B0\uFF0C\u9760\u5F97\u5C31\u662F JVM\uFF0C\u5B83\u80FD\u5728\u4E0D\u540C\u7684\u64CD\u4F5C\u7CFB\u7EDF\u4E0B\u8FD0\u884C\u540C\u4E00\u4EFD\u6E90\u4EE3\u7801\u7F16\u8BD1\u540E\u7684 class \u6587\u4EF6\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/class-file-jiegou-dfd7ce0d-1da2-4547-b2d7-57e0350f5911.png" alt=""></p><p>Java \u662F\u8DE8\u5E73\u53F0\u7684\uFF0CJVM \u4F5C\u4E3A\u4E2D\u95F4\u5C42\uFF0C\u81EA\u7136\u8981\u9488\u5BF9\u4E0D\u540C\u7684\u64CD\u4F5C\u7CFB\u7EDF\u63D0\u4F9B\u4E0D\u540C\u7684\u5B9E\u73B0\u3002\u62FF JDK 11 \u6765\u8BF4\uFF0C\u5B83\u7684\u5B9E\u73B0\u5C31\u6709\u4E0A\u56FE\u4E2D\u63D0\u5230\u7684\u8FD9\u4E48\u591A\u79CD\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/class-file-jiegou-b1386f9e-c69b-44b0-a8d0-69ffbe9ed31f.png" alt=""></p><p>\u901A\u8FC7\u4E0D\u540C\u64CD\u4F5C\u7CFB\u7EDF\u7684 JVM\uFF0C\u6211\u4EEC\u7684\u6E90\u4EE3\u7801\u5C31\u53EF\u4EE5\u4E0D\u7528\u6839\u636E\u4E0D\u540C\u7684\u64CD\u4F5C\u7CFB\u7EDF\u7F16\u8BD1\u6210\u4E0D\u540C\u7684\u4E8C\u8FDB\u5236\u53EF\u6267\u884C\u6587\u4EF6\u4E86\uFF0C\u8DE8\u5E73\u53F0\u7684\u76EE\u6807\u4E5F\u5C31\u5B9E\u73B0\u4E86\u3002\u90A3\u8FD9\u4E2A class \u6587\u4EF6\u5230\u5E95\u662F\u4EC0\u4E48\u73A9\u610F\u5462\uFF1F\u5B83\u662F\u600E\u4E48\u88AB JVM \u8BC6\u522B\u7684\u5462\uFF1F</p><p>\u6211\u4EEC\u7528 IDEA \u7F16\u5199\u4E00\u6BB5\u7B80\u5355\u7684 Java \u4EE3\u7801\uFF0C\u6587\u4EF6\u540D\u4E3A Hello.java\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">package</span> <span class="token namespace">com<span class="token punctuation">.</span>itwanger<span class="token punctuation">.</span>jvm</span><span class="token punctuation">;</span>
 <span class="token keyword">class</span> <span class="token class-name">Hello</span> <span class="token punctuation">{</span>
     <span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">void</span> <span class="token function">main</span><span class="token punctuation">(</span><span class="token class-name">String</span><span class="token punctuation">[</span><span class="token punctuation">]</span> args<span class="token punctuation">)</span> <span class="token punctuation">{</span>
         <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">&quot;Hello!&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
diff --git a/dist/assets/class-load.html.ac3b08f8.js b/dist/assets/class-load.html.07c5abca.js
similarity index 99%
rename from dist/assets/class-load.html.ac3b08f8.js
rename to dist/assets/class-load.html.07c5abca.js
index 7265040b..6c688f3b 100644
--- a/dist/assets/class-load.html.ac3b08f8.js
+++ b/dist/assets/class-load.html.07c5abca.js
@@ -1,4 +1,4 @@
-import{_ as a}from"./plugin-vue_export-helper.21dcd24c.js";import{o as n,c as s,e}from"./app.a0271b9c.js";const p={},t=e(`<h1 id="\u6211\u7ADF\u7136\u4E0D\u518D\u6297\u62D2java\u7684\u7C7B\u52A0\u8F7D\u673A\u5236\u4E86" tabindex="-1"><a class="header-anchor" href="#\u6211\u7ADF\u7136\u4E0D\u518D\u6297\u62D2java\u7684\u7C7B\u52A0\u8F7D\u673A\u5236\u4E86" aria-hidden="true">#</a> \u6211\u7ADF\u7136\u4E0D\u518D\u6297\u62D2Java\u7684\u7C7B\u52A0\u8F7D\u673A\u5236\u4E86</h1><h3 id="_01\u3001\u5B57\u8282\u7801" tabindex="-1"><a class="header-anchor" href="#_01\u3001\u5B57\u8282\u7801" aria-hidden="true">#</a> 01\u3001\u5B57\u8282\u7801</h3><p>\u5728\u804A Java \u7C7B\u52A0\u8F7D\u673A\u5236\u4E4B\u524D\uFF0C\u9700\u8981\u5148\u4E86\u89E3\u4E00\u4E0B Java \u5B57\u8282\u7801\uFF0C\u56E0\u4E3A\u5B83\u548C\u7C7B\u52A0\u8F7D\u673A\u5236\u606F\u606F\u76F8\u5173\u3002</p><p>\u8BA1\u7B97\u673A\u53EA\u8BA4\u8BC6 0 \u548C 1\uFF0C\u6240\u4EE5\u4EFB\u4F55\u8BED\u8A00\u7F16\u5199\u7684\u7A0B\u5E8F\u90FD\u9700\u8981\u7F16\u8BD1\u6210\u673A\u5668\u7801\u624D\u80FD\u88AB\u8BA1\u7B97\u673A\u7406\u89E3\uFF0C\u7136\u540E\u6267\u884C\uFF0CJava \u4E5F\u4E0D\u4F8B\u5916\u3002</p><p>Java \u5728\u8BDE\u751F\u7684\u65F6\u5019\u558A\u51FA\u4E86\u4E00\u4E2A\u975E\u5E38\u725B\u903C\u7684\u53E3\u53F7\uFF1A\u201CWrite Once, Run Anywhere\u201D\uFF0C\u4E3A\u4E86\u8FBE\u6210\u8FD9\u4E2A\u76EE\u7684\uFF0CSun \u516C\u53F8\u53D1\u5E03\u4E86\u8BB8\u591A\u53EF\u4EE5\u5728\u4E0D\u540C\u5E73\u53F0\uFF08Windows\u3001Linux\uFF09\u4E0A\u8FD0\u884C\u7684 Java \u865A\u62DF\u673A\uFF08JVM\uFF09\u2014\u2014\u8D1F\u8D23\u8F7D\u5165\u548C\u6267\u884C Java \u7F16\u8BD1\u540E\u7684\u5B57\u8282\u7801\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/class-load-01.png" alt=""></p><p>\u5230\u5E95 Java \u5B57\u8282\u7801\u662F\u4EC0\u4E48\u6837\u5B50\uFF0C\u6211\u4EEC\u501F\u52A9\u4E00\u6BB5\u7B80\u5355\u7684\u4EE3\u7801\u6765\u770B\u4E00\u770B\u3002</p><p>\u6E90\u7801\u5982\u4E0B\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">package</span> <span class="token namespace">com<span class="token punctuation">.</span>cmower<span class="token punctuation">.</span>java_demo</span><span class="token punctuation">;</span>
+import{_ as a}from"./plugin-vue_export-helper.21dcd24c.js";import{o as n,c as s,e}from"./app.615e41d8.js";const p={},t=e(`<h1 id="\u6211\u7ADF\u7136\u4E0D\u518D\u6297\u62D2java\u7684\u7C7B\u52A0\u8F7D\u673A\u5236\u4E86" tabindex="-1"><a class="header-anchor" href="#\u6211\u7ADF\u7136\u4E0D\u518D\u6297\u62D2java\u7684\u7C7B\u52A0\u8F7D\u673A\u5236\u4E86" aria-hidden="true">#</a> \u6211\u7ADF\u7136\u4E0D\u518D\u6297\u62D2Java\u7684\u7C7B\u52A0\u8F7D\u673A\u5236\u4E86</h1><h3 id="_01\u3001\u5B57\u8282\u7801" tabindex="-1"><a class="header-anchor" href="#_01\u3001\u5B57\u8282\u7801" aria-hidden="true">#</a> 01\u3001\u5B57\u8282\u7801</h3><p>\u5728\u804A Java \u7C7B\u52A0\u8F7D\u673A\u5236\u4E4B\u524D\uFF0C\u9700\u8981\u5148\u4E86\u89E3\u4E00\u4E0B Java \u5B57\u8282\u7801\uFF0C\u56E0\u4E3A\u5B83\u548C\u7C7B\u52A0\u8F7D\u673A\u5236\u606F\u606F\u76F8\u5173\u3002</p><p>\u8BA1\u7B97\u673A\u53EA\u8BA4\u8BC6 0 \u548C 1\uFF0C\u6240\u4EE5\u4EFB\u4F55\u8BED\u8A00\u7F16\u5199\u7684\u7A0B\u5E8F\u90FD\u9700\u8981\u7F16\u8BD1\u6210\u673A\u5668\u7801\u624D\u80FD\u88AB\u8BA1\u7B97\u673A\u7406\u89E3\uFF0C\u7136\u540E\u6267\u884C\uFF0CJava \u4E5F\u4E0D\u4F8B\u5916\u3002</p><p>Java \u5728\u8BDE\u751F\u7684\u65F6\u5019\u558A\u51FA\u4E86\u4E00\u4E2A\u975E\u5E38\u725B\u903C\u7684\u53E3\u53F7\uFF1A\u201CWrite Once, Run Anywhere\u201D\uFF0C\u4E3A\u4E86\u8FBE\u6210\u8FD9\u4E2A\u76EE\u7684\uFF0CSun \u516C\u53F8\u53D1\u5E03\u4E86\u8BB8\u591A\u53EF\u4EE5\u5728\u4E0D\u540C\u5E73\u53F0\uFF08Windows\u3001Linux\uFF09\u4E0A\u8FD0\u884C\u7684 Java \u865A\u62DF\u673A\uFF08JVM\uFF09\u2014\u2014\u8D1F\u8D23\u8F7D\u5165\u548C\u6267\u884C Java \u7F16\u8BD1\u540E\u7684\u5B57\u8282\u7801\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/class-load-01.png" alt=""></p><p>\u5230\u5E95 Java \u5B57\u8282\u7801\u662F\u4EC0\u4E48\u6837\u5B50\uFF0C\u6211\u4EEC\u501F\u52A9\u4E00\u6BB5\u7B80\u5355\u7684\u4EE3\u7801\u6765\u770B\u4E00\u770B\u3002</p><p>\u6E90\u7801\u5982\u4E0B\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">package</span> <span class="token namespace">com<span class="token punctuation">.</span>cmower<span class="token punctuation">.</span>java_demo</span><span class="token punctuation">;</span>
 
 <span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">Test</span> <span class="token punctuation">{</span>
 
diff --git a/dist/assets/class-object.html.2cd0dbd5.js b/dist/assets/class-object.html.a22a09d8.js
similarity index 99%
rename from dist/assets/class-object.html.2cd0dbd5.js
rename to dist/assets/class-object.html.a22a09d8.js
index b62c119e..09d09f05 100644
--- a/dist/assets/class-object.html.2cd0dbd5.js
+++ b/dist/assets/class-object.html.a22a09d8.js
@@ -1,4 +1,4 @@
-import{_ as e}from"./plugin-vue_export-helper.21dcd24c.js";import{o as a,c as s,e as t}from"./app.a0271b9c.js";const i={},n=t(`<h1 id="\u5148\u6709class\u8FD8\u662F\u5148\u6709object" tabindex="-1"><a class="header-anchor" href="#\u5148\u6709class\u8FD8\u662F\u5148\u6709object" aria-hidden="true">#</a> \u5148\u6709Class\u8FD8\u662F\u5148\u6709Object\uFF1F</h1><p>Java \u5BF9\u8C61\u6A21\u578B\u4E2D\uFF1A</p><ul><li>\u6240\u6709\u7684\u7C7B\u90FD\u662FClass\u7C7B\u7684\u5B9E\u4F8B\uFF0CObject\u662F\u7C7B\uFF0C\u90A3\u4E48Object\u4E5F\u662FClass\u7C7B\u7684\u4E00\u4E2A\u5B9E\u4F8B\u3002</li><li>\u6240\u6709\u7684\u7C7B\u90FD\u6700\u7EC8\u7EE7\u627F\u81EAObject\u7C7B\uFF0CClass\u662F\u7C7B\uFF0C\u90A3\u4E48Class\u4E5F\u7EE7\u627F\u81EAObject\u3002</li></ul><p>\u90A3\u5230\u5E95\u662F\u5148\u6709Class\u8FD8\u662F\u5148\u6709Object\uFF1F JVM \u662F\u600E\u4E48\u5904\u7406\u8FD9\u4E2A\u201C\u9E21\xB7\u86CB\u201D\u95EE\u9898\u5462\uFF1F</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/basic-extra-meal/class-object-2f47490c-70b8-41b8-9551-42c2f98eea91.png" alt=""></p><p>\u9488\u5BF9\u8FD9\u4E2A\u95EE\u9898\uFF0C\u6211\u5728\u77E5\u4E4E\u4E0A\u770B\u5230\u4E86 R \u5927\u7684\u4E00\u4E2A\u56DE\u7B54\uFF0C\u6B63\u597D\u89E3\u7B54\u4E86\u6211\u5FC3\u4E2D\u7684\u7591\u60D1\uFF0C\u5C31\u5206\u4EAB\u51FA\u6765\u7ED9\u5404\u4F4D\u5C0F\u4F19\u4F34\u4E00\u4E2A\u53C2\u8003\u548C\u542F\u53D1~</p><blockquote><p>\u4F5C\u8005\uFF1ARednaxelaFX\uFF0C\u6574\u7406\uFF1A\u6C89\u9ED8\u738B\u4E8C\uFF0C\u53C2\u8003\u94FE\u63A5\uFF1Ahttps://www.zhihu.com/question/30301819/answer/47539163</p></blockquote><hr><p>\u201C\u9E21\u30FB\u86CB\u201D\u95EE\u9898\u901A\u5E38\u90FD\u662F\u901A\u8FC7\u4E00\u79CD\u53EB\u201C\u81EA\u4E3E\u201D\uFF08bootstrap\uFF09\u7684\u8FC7\u7A0B\u6765\u89E3\u51B3\u7684\u3002</p><p>\u201C\u9E21\u86CB\u95EE\u9898\u201D\u7684\u6839\u672C\u77DB\u76FE\u5C31\u5728\u4E8E\u5047\u5B9A\u4E86\u201C\u9E21\u201D\u6216\u201C\u86CB\u201D\u7684\u5176\u4E2D\u4E00\u4E2A\u8981\u5148\u8FDB\u5165\u201C\u5B8C\u5168\u53EF\u7528\u201D\u7684\u72B6\u6001\u3002\u800C\u8BB8\u591A\u73B0\u5B9E\u4E2D\u88AB\u7B80\u5316\u4E3A\u201C\u9E21\u86CB\u95EE\u9898\u201D\u7684\u60C5\u51B5\u5B9E\u9645\u53EF\u4EE5\u5728\u201C\u6DF7\u6C8C\u201D\u4E2D\u628A\u201C\u9E21\u201D\u548C\u201C\u86CB\u201D\u90FD\u521D\u59CB\u5316\u597D\uFF0C\u800C\u4E0D\u5B58\u5728\u5148\u540E\u95EE\u9898\uFF1B\u5728\u5B83\u4EEC\u521D\u59CB\u5316\u7684\u8FC7\u7A0B\u4E2D\uFF0C\u4E24\u8005\u90FD\u4E0D\u5904\u4E8E\u201C\u5B8C\u5168\u53EF\u7528\u201D\u72B6\u6001\uFF0C\u800C\u5B8C\u6210\u521D\u59CB\u5316\u540E\u5B83\u4EEC\u5C31\u540C\u65F6\u90FD\u8FDB\u5165\u4E86\u53EF\u7528\u72B6\u6001\u3002</p><p>\u6253\u4E2A\u6BD4\u65B9\uFF0C\u756A\u8304\u7092\u86CB\u3002\u5E76\u4E0D\u662F\u8981\u5148\u628A\u756A\u8304\u5B8C\u5168\u7092\u597D\uFF0C\u7136\u540E\u628A\u9E21\u86CB\u5B8C\u5168\u7092\u597D\uFF0C\u7136\u540E\u628A\u5B83\u4EEC\u6DF7\u8D77\u6765\uFF1B\u800C\u662F\u5148\u7092\u756A\u8304\u7092\u5230\u534A\u719F\uFF0C\u518D\u7092\u9E21\u86CB\u7092\u5230\u534A\u719F\uFF0C\u7136\u540E\u628A\u4E24\u4E2A\u534A\u719F\u7684\u90E8\u5206\u6DF7\u5728\u4E00\u8D77\u540C\u65F6\u7092\u719F\u3002</p><p>\u5BF9\u4E8E<strong>\u5148\u6709Class\u8FD8\u662F\u5148\u6709Object</strong>\u8FD9\u4E2A\u95EE\u9898\u6765\u8BF4\uFF0C\u9898\u4E3B\u5047\u8BBE\u6240\u6709\u7684\u7C7B\u90FD\u662FClass\u7C7B\u7684\u5B9E\u4F8B\uFF0CObject\u662F\u7C7B\uFF0C\u90A3\u4E48Object\u4E5F\u662FClass\u7C7B\u7684\u4E00\u4E2A\u5B9E\u4F8B\uFF0C\u8FD9\u4E2A\u5047\u8BBE\u5C31\u662F\u9519\u7684\u3002</p><p><code>java.lang.Object</code>\u662F\u4E00\u4E2AJava\u7C7B\uFF0C\u4F46\u5E76\u4E0D\u662F<code>java.lang.Class</code>\u7684\u4E00\u4E2A\u5B9E\u4F8B\u3002\u540E\u8005\u53EA\u662F\u4E00\u4E2A\u7528\u4E8E\u63CF\u8FF0Java\u7C7B\u4E0E\u63A5\u53E3\u7684\u3001\u7528\u4E8E\u652F\u6301\u53CD\u5C04\u64CD\u4F5C\u7684\u7C7B\u578B\u3002\u8FD9\u70B9\u4E0AJava\u8DDF\u5176\u5B83\u4E00\u4E9B\u66F4\u7EAF\u7CB9\u7684\u9762\u5411\u5BF9\u8C61\u8BED\u8A00\uFF08\u4F8B\u5982Python\u548CRuby\uFF09\u4E0D\u540C\u3002</p><p>\u7B2C\u4E8C\u4E2A\u5047\u8BBE\u201C\u6240\u6709\u7684\u7C7B\u90FD\u6700\u7EC8\u7EE7\u627F\u81EAObject\u7C7B\uFF0CClass\u662F\u7C7B\uFF0C\u90A3\u4E48Class\u4E5F\u7EE7\u627F\u81EAObject\u201D\u662F\u5BF9\u7684\uFF0C<code>java.lang.Class</code>\u662F<code>java.lang.Object</code>\u7684\u6D3E\u751F\u7C7B\uFF0C\u524D\u8005\u7EE7\u627F\u81EA\u540E\u8005\u3002</p><p>\u867D\u7136\u7B2C1\u4E2A\u5047\u8BBE\u4E0D\u5BF9\uFF0C\u4F46\u201C\u9E21\u86CB\u95EE\u9898\u201D\u4ECD\u7136\u5B58\u5728\uFF1A\u5728\u4E00\u4E2A\u5DF2\u7ECF\u542F\u52A8\u5B8C\u6BD5\u3001\u53EF\u4EE5\u4F7F\u7528\u7684Java\u5BF9\u8C61\u7CFB\u7EDF\u91CC\uFF0C\u5FC5\u987B\u8981\u6709\u4E00\u4E2A<code>java.lang.Class</code>\u5B9E\u4F8B\u5BF9\u5E94<code>java.lang.Object</code>\u8FD9\u4E2A\u7C7B\uFF1B\u800C<code>java.lang.Class</code>\u662F<code>java.lang.Object</code>\u7684\u6D3E\u751F\u7C7B\uFF0C\u6309\u201C\u4E00\u822C\u601D\u7EF4\u201D\uFF0C\u524D\u8005\u5E94\u8BE5\u8981\u5728\u540E\u8005\u5B8C\u6210\u521D\u59CB\u5316\u4E4B\u540E\u624D\u53EF\u4EE5\u521D\u59CB\u5316\u2026</p><p>\u4E8B\u5B9E\u662F\uFF1A\u8FD9\u4E9B\u76F8\u4E92\u4F9D\u8D56\u7684\u6838\u5FC3\u7C7B\u578B\u5B8C\u5168\u53EF\u4EE5\u5728\u201C\u6DF7\u6C8C\u201D\u4E2D\u4E00\u53E3\u6C14\u90FD\u521D\u59CB\u5316\u597D\uFF0C\u7136\u540E\u5BF9\u8C61\u7CFB\u7EDF\u7684\u72B6\u6001\u624D\u53EB\u505A\u5B8C\u6210\u4E86\u201Cbootstrap\u201D\uFF0C\u540E\u9762\u5C31\u53EF\u4EE5\u6309\u7167Java\u5BF9\u8C61\u7CFB\u7EDF\u7684\u4E00\u822C\u89C4\u5219\u53BB\u8FD0\u884C\u3002JVM\u3001JavaScript\u3001Python\u3001Ruby\u7B49\u7684\u8FD0\u884C\u65F6\u90FD\u6709\u8FD9\u6837\u7684bootstrap\u8FC7\u7A0B\u3002</p><p>\u5728\u201C\u6DF7\u6C8C\u201D\uFF08boostrap\u8FC7\u7A0B\uFF09\u91CC\uFF0CJVM\u53EF\u4EE5\u4E3A\u5BF9\u8C61\u7CFB\u7EDF\u4E2D\u6700\u91CD\u8981\u7684\u4E00\u4E9B\u6838\u5FC3\u7C7B\u578B\u5148\u5206\u914D\u597D\u5185\u5B58\u7A7A\u95F4\uFF0C\u8BA9\u5B83\u4EEC\u8FDB\u5165[\u5DF2\u5206\u914D\u7A7A\u95F4]\u4F46[\u5C1A\u672A\u5B8C\u5168\u521D\u59CB\u5316]\u72B6\u6001\u3002</p><p>\u6B64\u65F6\u8FD9\u4E9B\u5BF9\u8C61\u867D\u7136\u5DF2\u7ECF\u5206\u914D\u4E86\u7A7A\u95F4\uFF0C\u4F46\u56E0\u4E3A\u72B6\u6001\u8FD8\u4E0D\u5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VM\u91CC\uFF0C\u6709\u4E00\u4E2A\u53EB\u505A\u201CUniverse\u201D\u7684C++\u7C7B\u7528\u4E8E\u8BB0\u5F55\u5BF9\u8C61\u7CFB\u7EDF\u7684\u603B\u4F53\u72B6\u6001\u3002\u5B83\u6709\u8FD9\u4E48\u4E24\u4E2A\u6709\u8DA3\u7684\u5B57\u6BB5\u8BB0\u5F55\u5F53\u524D\u662F\u5904\u4E8Ebootstrapping\u9636\u6BB5\u8FD8\u662F\u5DF2\u7ECF\u5B8C\u5168\u521D\u59CB\u5316\u597D\uFF1A</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>static bool is_bootstrapping()                      { return _bootstrapping; }
+import{_ as e}from"./plugin-vue_export-helper.21dcd24c.js";import{o as a,c as s,e as t}from"./app.615e41d8.js";const i={},n=t(`<h1 id="\u5148\u6709class\u8FD8\u662F\u5148\u6709object" tabindex="-1"><a class="header-anchor" href="#\u5148\u6709class\u8FD8\u662F\u5148\u6709object" aria-hidden="true">#</a> \u5148\u6709Class\u8FD8\u662F\u5148\u6709Object\uFF1F</h1><p>Java \u5BF9\u8C61\u6A21\u578B\u4E2D\uFF1A</p><ul><li>\u6240\u6709\u7684\u7C7B\u90FD\u662FClass\u7C7B\u7684\u5B9E\u4F8B\uFF0CObject\u662F\u7C7B\uFF0C\u90A3\u4E48Object\u4E5F\u662FClass\u7C7B\u7684\u4E00\u4E2A\u5B9E\u4F8B\u3002</li><li>\u6240\u6709\u7684\u7C7B\u90FD\u6700\u7EC8\u7EE7\u627F\u81EAObject\u7C7B\uFF0CClass\u662F\u7C7B\uFF0C\u90A3\u4E48Class\u4E5F\u7EE7\u627F\u81EAObject\u3002</li></ul><p>\u90A3\u5230\u5E95\u662F\u5148\u6709Class\u8FD8\u662F\u5148\u6709Object\uFF1F JVM \u662F\u600E\u4E48\u5904\u7406\u8FD9\u4E2A\u201C\u9E21\xB7\u86CB\u201D\u95EE\u9898\u5462\uFF1F</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/basic-extra-meal/class-object-2f47490c-70b8-41b8-9551-42c2f98eea91.png" alt=""></p><p>\u9488\u5BF9\u8FD9\u4E2A\u95EE\u9898\uFF0C\u6211\u5728\u77E5\u4E4E\u4E0A\u770B\u5230\u4E86 R \u5927\u7684\u4E00\u4E2A\u56DE\u7B54\uFF0C\u6B63\u597D\u89E3\u7B54\u4E86\u6211\u5FC3\u4E2D\u7684\u7591\u60D1\uFF0C\u5C31\u5206\u4EAB\u51FA\u6765\u7ED9\u5404\u4F4D\u5C0F\u4F19\u4F34\u4E00\u4E2A\u53C2\u8003\u548C\u542F\u53D1~</p><blockquote><p>\u4F5C\u8005\uFF1ARednaxelaFX\uFF0C\u6574\u7406\uFF1A\u6C89\u9ED8\u738B\u4E8C\uFF0C\u53C2\u8003\u94FE\u63A5\uFF1Ahttps://www.zhihu.com/question/30301819/answer/47539163</p></blockquote><hr><p>\u201C\u9E21\u30FB\u86CB\u201D\u95EE\u9898\u901A\u5E38\u90FD\u662F\u901A\u8FC7\u4E00\u79CD\u53EB\u201C\u81EA\u4E3E\u201D\uFF08bootstrap\uFF09\u7684\u8FC7\u7A0B\u6765\u89E3\u51B3\u7684\u3002</p><p>\u201C\u9E21\u86CB\u95EE\u9898\u201D\u7684\u6839\u672C\u77DB\u76FE\u5C31\u5728\u4E8E\u5047\u5B9A\u4E86\u201C\u9E21\u201D\u6216\u201C\u86CB\u201D\u7684\u5176\u4E2D\u4E00\u4E2A\u8981\u5148\u8FDB\u5165\u201C\u5B8C\u5168\u53EF\u7528\u201D\u7684\u72B6\u6001\u3002\u800C\u8BB8\u591A\u73B0\u5B9E\u4E2D\u88AB\u7B80\u5316\u4E3A\u201C\u9E21\u86CB\u95EE\u9898\u201D\u7684\u60C5\u51B5\u5B9E\u9645\u53EF\u4EE5\u5728\u201C\u6DF7\u6C8C\u201D\u4E2D\u628A\u201C\u9E21\u201D\u548C\u201C\u86CB\u201D\u90FD\u521D\u59CB\u5316\u597D\uFF0C\u800C\u4E0D\u5B58\u5728\u5148\u540E\u95EE\u9898\uFF1B\u5728\u5B83\u4EEC\u521D\u59CB\u5316\u7684\u8FC7\u7A0B\u4E2D\uFF0C\u4E24\u8005\u90FD\u4E0D\u5904\u4E8E\u201C\u5B8C\u5168\u53EF\u7528\u201D\u72B6\u6001\uFF0C\u800C\u5B8C\u6210\u521D\u59CB\u5316\u540E\u5B83\u4EEC\u5C31\u540C\u65F6\u90FD\u8FDB\u5165\u4E86\u53EF\u7528\u72B6\u6001\u3002</p><p>\u6253\u4E2A\u6BD4\u65B9\uFF0C\u756A\u8304\u7092\u86CB\u3002\u5E76\u4E0D\u662F\u8981\u5148\u628A\u756A\u8304\u5B8C\u5168\u7092\u597D\uFF0C\u7136\u540E\u628A\u9E21\u86CB\u5B8C\u5168\u7092\u597D\uFF0C\u7136\u540E\u628A\u5B83\u4EEC\u6DF7\u8D77\u6765\uFF1B\u800C\u662F\u5148\u7092\u756A\u8304\u7092\u5230\u534A\u719F\uFF0C\u518D\u7092\u9E21\u86CB\u7092\u5230\u534A\u719F\uFF0C\u7136\u540E\u628A\u4E24\u4E2A\u534A\u719F\u7684\u90E8\u5206\u6DF7\u5728\u4E00\u8D77\u540C\u65F6\u7092\u719F\u3002</p><p>\u5BF9\u4E8E<strong>\u5148\u6709Class\u8FD8\u662F\u5148\u6709Object</strong>\u8FD9\u4E2A\u95EE\u9898\u6765\u8BF4\uFF0C\u9898\u4E3B\u5047\u8BBE\u6240\u6709\u7684\u7C7B\u90FD\u662FClass\u7C7B\u7684\u5B9E\u4F8B\uFF0CObject\u662F\u7C7B\uFF0C\u90A3\u4E48Object\u4E5F\u662FClass\u7C7B\u7684\u4E00\u4E2A\u5B9E\u4F8B\uFF0C\u8FD9\u4E2A\u5047\u8BBE\u5C31\u662F\u9519\u7684\u3002</p><p><code>java.lang.Object</code>\u662F\u4E00\u4E2AJava\u7C7B\uFF0C\u4F46\u5E76\u4E0D\u662F<code>java.lang.Class</code>\u7684\u4E00\u4E2A\u5B9E\u4F8B\u3002\u540E\u8005\u53EA\u662F\u4E00\u4E2A\u7528\u4E8E\u63CF\u8FF0Java\u7C7B\u4E0E\u63A5\u53E3\u7684\u3001\u7528\u4E8E\u652F\u6301\u53CD\u5C04\u64CD\u4F5C\u7684\u7C7B\u578B\u3002\u8FD9\u70B9\u4E0AJava\u8DDF\u5176\u5B83\u4E00\u4E9B\u66F4\u7EAF\u7CB9\u7684\u9762\u5411\u5BF9\u8C61\u8BED\u8A00\uFF08\u4F8B\u5982Python\u548CRuby\uFF09\u4E0D\u540C\u3002</p><p>\u7B2C\u4E8C\u4E2A\u5047\u8BBE\u201C\u6240\u6709\u7684\u7C7B\u90FD\u6700\u7EC8\u7EE7\u627F\u81EAObject\u7C7B\uFF0CClass\u662F\u7C7B\uFF0C\u90A3\u4E48Class\u4E5F\u7EE7\u627F\u81EAObject\u201D\u662F\u5BF9\u7684\uFF0C<code>java.lang.Class</code>\u662F<code>java.lang.Object</code>\u7684\u6D3E\u751F\u7C7B\uFF0C\u524D\u8005\u7EE7\u627F\u81EA\u540E\u8005\u3002</p><p>\u867D\u7136\u7B2C1\u4E2A\u5047\u8BBE\u4E0D\u5BF9\uFF0C\u4F46\u201C\u9E21\u86CB\u95EE\u9898\u201D\u4ECD\u7136\u5B58\u5728\uFF1A\u5728\u4E00\u4E2A\u5DF2\u7ECF\u542F\u52A8\u5B8C\u6BD5\u3001\u53EF\u4EE5\u4F7F\u7528\u7684Java\u5BF9\u8C61\u7CFB\u7EDF\u91CC\uFF0C\u5FC5\u987B\u8981\u6709\u4E00\u4E2A<code>java.lang.Class</code>\u5B9E\u4F8B\u5BF9\u5E94<code>java.lang.Object</code>\u8FD9\u4E2A\u7C7B\uFF1B\u800C<code>java.lang.Class</code>\u662F<code>java.lang.Object</code>\u7684\u6D3E\u751F\u7C7B\uFF0C\u6309\u201C\u4E00\u822C\u601D\u7EF4\u201D\uFF0C\u524D\u8005\u5E94\u8BE5\u8981\u5728\u540E\u8005\u5B8C\u6210\u521D\u59CB\u5316\u4E4B\u540E\u624D\u53EF\u4EE5\u521D\u59CB\u5316\u2026</p><p>\u4E8B\u5B9E\u662F\uFF1A\u8FD9\u4E9B\u76F8\u4E92\u4F9D\u8D56\u7684\u6838\u5FC3\u7C7B\u578B\u5B8C\u5168\u53EF\u4EE5\u5728\u201C\u6DF7\u6C8C\u201D\u4E2D\u4E00\u53E3\u6C14\u90FD\u521D\u59CB\u5316\u597D\uFF0C\u7136\u540E\u5BF9\u8C61\u7CFB\u7EDF\u7684\u72B6\u6001\u624D\u53EB\u505A\u5B8C\u6210\u4E86\u201Cbootstrap\u201D\uFF0C\u540E\u9762\u5C31\u53EF\u4EE5\u6309\u7167Java\u5BF9\u8C61\u7CFB\u7EDF\u7684\u4E00\u822C\u89C4\u5219\u53BB\u8FD0\u884C\u3002JVM\u3001JavaScript\u3001Python\u3001Ruby\u7B49\u7684\u8FD0\u884C\u65F6\u90FD\u6709\u8FD9\u6837\u7684bootstrap\u8FC7\u7A0B\u3002</p><p>\u5728\u201C\u6DF7\u6C8C\u201D\uFF08boostrap\u8FC7\u7A0B\uFF09\u91CC\uFF0CJVM\u53EF\u4EE5\u4E3A\u5BF9\u8C61\u7CFB\u7EDF\u4E2D\u6700\u91CD\u8981\u7684\u4E00\u4E9B\u6838\u5FC3\u7C7B\u578B\u5148\u5206\u914D\u597D\u5185\u5B58\u7A7A\u95F4\uFF0C\u8BA9\u5B83\u4EEC\u8FDB\u5165[\u5DF2\u5206\u914D\u7A7A\u95F4]\u4F46[\u5C1A\u672A\u5B8C\u5168\u521D\u59CB\u5316]\u72B6\u6001\u3002</p><p>\u6B64\u65F6\u8FD9\u4E9B\u5BF9\u8C61\u867D\u7136\u5DF2\u7ECF\u5206\u914D\u4E86\u7A7A\u95F4\uFF0C\u4F46\u56E0\u4E3A\u72B6\u6001\u8FD8\u4E0D\u5B8C\u6574\u6240\u4EE5\u5C1A\u4E0D\u53EF\u4F7F\u7528\u3002\u7136\u540E\uFF0C\u901A\u8FC7\u8FD9\u4E9B\u5206\u914D\u597D\u7684\u7A7A\u95F4\u628A\u8FD9\u4E9B\u6838\u5FC3\u7C7B\u578B\u4E4B\u95F4\u7684\u5F15\u7528\u5173\u7CFB\u4E32\u597D\u3002</p><p>\u5230\u6B64\u4E3A\u6B62\u6240\u6709\u52A8\u4F5C\u90FD\u7531JVM\u5B8C\u6210\uFF0C\u5C1A\u672A\u6267\u884C\u4EFB\u4F55Java\u5B57\u8282\u7801\u3002\u7136\u540E\u8FD9\u4E9B\u6838\u5FC3\u7C7B\u578B\u5C31\u8FDB\u5165\u4E86[\u5B8C\u5168\u521D\u59CB\u5316]\u72B6\u6001\uFF0C\u5BF9\u8C61\u7CFB\u7EDF\u5C31\u53EF\u4EE5\u5F00\u59CB\u81EA\u6211\u8FD0\u884C\u4E0B\u53BB\uFF0C\u4E5F\u5C31\u662F\u53EF\u4EE5\u5F00\u59CB\u6267\u884CJava\u5B57\u8282\u7801\u6765\u8FDB\u4E00\u6B65\u5B8C\u6210Java\u7CFB\u7EDF\u7684\u521D\u59CB\u5316\u4E86\u3002</p><p>\u5728HotSpot VM\u91CC\uFF0C\u6709\u4E00\u4E2A\u53EB\u505A\u201CUniverse\u201D\u7684C++\u7C7B\u7528\u4E8E\u8BB0\u5F55\u5BF9\u8C61\u7CFB\u7EDF\u7684\u603B\u4F53\u72B6\u6001\u3002\u5B83\u6709\u8FD9\u4E48\u4E24\u4E2A\u6709\u8DA3\u7684\u5B57\u6BB5\u8BB0\u5F55\u5F53\u524D\u662F\u5904\u4E8Ebootstrapping\u9636\u6BB5\u8FD8\u662F\u5DF2\u7ECF\u5B8C\u5168\u521D\u59CB\u5316\u597D\uFF1A</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>static bool is_bootstrapping()                      { return _bootstrapping; }
 static bool is_fully_initialized()                  { return _fully_initialized; }
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><p>\u7136\u540E<code>Universe::genesis()</code>\u51FD\u6570\u4F1A\u5728bootstrap\u9636\u6BB5\u4E2D\u521B\u5EFA\u6838\u5FC3\u7C7B\u578B\u7684\u5BF9\u8C61\u6A21\u578B\uFF0C\u5176\u4E2D\u4F1A\u8C03\u7528<code>SystemDictionary::initialize()</code>\u6765\u521D\u59CB\u5316\u5BF9\u8C61\u7CFB\u7EDF\u7684\u6838\u5FC3\u7C7B\u578B\uFF0C\u5176\u4E2D\u4F1A\u8FDB\u4E00\u6B65\u8DD1\u5230<code>SystemDictionary::initialize_preloaded_classes()</code>\u6765\u521B\u5EFA<code>java.lang.Object</code>\u3001<code>java.lang.Class</code>\u7B49\u6838\u5FC3\u7C7B\u578B\u3002</p><p>\u8FD9\u4E2A\u51FD\u6570\u5728\u52A0\u8F7D\u4E86<code>java.lang.Object</code>\u3001<code>java.lang.Class</code>\u7B49\u6838\u5FC3\u7C7B\u578B\u540E\u4F1A\u8C03\u7528<code>Universe::fixup_mirrors()</code>\u6765\u5B8C\u6210\u524D\u9762\u8BF4\u7684\u201C\u628A\u5F15\u7528\u5173\u7CFB\u4E32\u8D77\u6765\u201D\u7684\u52A8\u4F5C\uFF1A</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>// Fixup mirrors for classes loaded before java.lang.Class.
 // These calls iterate over the objects currently in the perm gen
diff --git a/dist/assets/code-init.html.16081b84.js b/dist/assets/code-init.html.58676afd.js
similarity index 99%
rename from dist/assets/code-init.html.16081b84.js
rename to dist/assets/code-init.html.58676afd.js
index 1493ed69..c0e41fb7 100644
--- a/dist/assets/code-init.html.16081b84.js
+++ b/dist/assets/code-init.html.58676afd.js
@@ -1,4 +1,4 @@
-import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e as p}from"./app.a0271b9c.js";const t={},e=p(`<h1 id="java\u4EE3\u7801\u521D\u59CB\u5316\u5757" tabindex="-1"><a class="header-anchor" href="#java\u4EE3\u7801\u521D\u59CB\u5316\u5757" aria-hidden="true">#</a> Java\u4EE3\u7801\u521D\u59CB\u5316\u5757</h1><p>\u201C\u54E5\uFF0C\u4ECA\u5929\u6211\u4EEC\u8981\u5B66\u4E60\u7684\u5185\u5BB9\u662F\u2018\u4EE3\u7801\u521D\u59CB\u5316\u5757\u2019\uFF0C\u5BF9\u5427\uFF1F\u201D\u770B\u6765\u4E09\u59B9\u5DF2\u7ECF\u63D0\u524D\u9884\u4E60\u4E86\u6211\u4E0A\u6B21\u7559\u7ED9\u5979\u7684\u4F5C\u4E1A\u3002</p><p>\u201C\u662F\u7684\uFF0C\u4E09\u59B9\u3002\u4EE3\u7801\u521D\u59CB\u5316\u5757\u7528\u4E8E\u521D\u59CB\u5316\u4E00\u4E9B\u6210\u5458\u53D8\u91CF\u3002 \u201D\u6211\u9762\u5E26\u7740\u6734\u5B9E\u65E0\u534E\u7684\u5FAE\u7B11\u56DE\u7B54\u7740\u5979\uFF0C\u201C\u5BF9\u8C61\u5728\u521B\u5EFA\u7684\u65F6\u5019\u4F1A\u6267\u884C\u4EE3\u7801\u521D\u59CB\u5316\u5757\u3002\u201D</p><p>\u201C\u53EF\u4EE5\u76F4\u63A5\u901A\u8FC7\u2018=\u2019\u64CD\u4F5C\u7B26\u5BF9\u6210\u5458\u53D8\u91CF\u8FDB\u884C\u521D\u59CB\u5316\uFF0C\u4F46\u901A\u8FC7\u4EE3\u7801\u521D\u59CB\u5316\u5757\u53EF\u4EE5\u505A\u66F4\u591A\u7684\u4E8B\u60C5\uFF0C\u6BD4\u5982\u8BF4\u6253\u5370\u51FA\u6210\u5458\u53D8\u91CF\u521D\u59CB\u5316\u540E\u7684\u503C\u3002\u201D</p><p>\u201C\u4E09\u59B9\uFF0C\u6765\u770B\u4E0B\u9762\u7684\u4EE3\u7801\uFF0C\u6211\u4EEC\u53EF\u4EE5\u76F4\u63A5\u901A\u8FC7 <code>=</code> \u64CD\u4F5C\u7B26\u5BF9\u6210\u5458\u53D8\u91CF\u8FDB\u884C\u521D\u59CB\u5316\u3002\u201D</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">class</span> <span class="token class-name">Bike</span><span class="token punctuation">{</span>  
+import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e as p}from"./app.615e41d8.js";const t={},e=p(`<h1 id="java\u4EE3\u7801\u521D\u59CB\u5316\u5757" tabindex="-1"><a class="header-anchor" href="#java\u4EE3\u7801\u521D\u59CB\u5316\u5757" aria-hidden="true">#</a> Java\u4EE3\u7801\u521D\u59CB\u5316\u5757</h1><p>\u201C\u54E5\uFF0C\u4ECA\u5929\u6211\u4EEC\u8981\u5B66\u4E60\u7684\u5185\u5BB9\u662F\u2018\u4EE3\u7801\u521D\u59CB\u5316\u5757\u2019\uFF0C\u5BF9\u5427\uFF1F\u201D\u770B\u6765\u4E09\u59B9\u5DF2\u7ECF\u63D0\u524D\u9884\u4E60\u4E86\u6211\u4E0A\u6B21\u7559\u7ED9\u5979\u7684\u4F5C\u4E1A\u3002</p><p>\u201C\u662F\u7684\uFF0C\u4E09\u59B9\u3002\u4EE3\u7801\u521D\u59CB\u5316\u5757\u7528\u4E8E\u521D\u59CB\u5316\u4E00\u4E9B\u6210\u5458\u53D8\u91CF\u3002 \u201D\u6211\u9762\u5E26\u7740\u6734\u5B9E\u65E0\u534E\u7684\u5FAE\u7B11\u56DE\u7B54\u7740\u5979\uFF0C\u201C\u5BF9\u8C61\u5728\u521B\u5EFA\u7684\u65F6\u5019\u4F1A\u6267\u884C\u4EE3\u7801\u521D\u59CB\u5316\u5757\u3002\u201D</p><p>\u201C\u53EF\u4EE5\u76F4\u63A5\u901A\u8FC7\u2018=\u2019\u64CD\u4F5C\u7B26\u5BF9\u6210\u5458\u53D8\u91CF\u8FDB\u884C\u521D\u59CB\u5316\uFF0C\u4F46\u901A\u8FC7\u4EE3\u7801\u521D\u59CB\u5316\u5757\u53EF\u4EE5\u505A\u66F4\u591A\u7684\u4E8B\u60C5\uFF0C\u6BD4\u5982\u8BF4\u6253\u5370\u51FA\u6210\u5458\u53D8\u91CF\u521D\u59CB\u5316\u540E\u7684\u503C\u3002\u201D</p><p>\u201C\u4E09\u59B9\uFF0C\u6765\u770B\u4E0B\u9762\u7684\u4EE3\u7801\uFF0C\u6211\u4EEC\u53EF\u4EE5\u76F4\u63A5\u901A\u8FC7 <code>=</code> \u64CD\u4F5C\u7B26\u5BF9\u6210\u5458\u53D8\u91CF\u8FDB\u884C\u521D\u59CB\u5316\u3002\u201D</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">class</span> <span class="token class-name">Bike</span><span class="token punctuation">{</span>  
     <span class="token keyword">int</span> speed<span class="token operator">=</span><span class="token number">100</span><span class="token punctuation">;</span>  
 <span class="token punctuation">}</span>  
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>\u201C\u54E5\uFF0C\u90A3\u4E3A\u4EC0\u4E48\u8FD8\u9700\u8981\u4EE3\u7801\u521D\u59CB\u5316\u5757\u5462\uFF1F\u201D\u4E09\u59B9\u7728\u4E86\u7728\u773C\u775B\uFF0C\u4E0D\u89E3\u5730\u95EE\u3002</p><p>\u201C\u6211\u4EEC\u53EF\u4EE5\u901A\u8FC7\u4EE3\u7801\u521D\u59CB\u5316\u5757\u6267\u884C\u4E00\u4E2A\u66F4\u590D\u6742\u7684\u64CD\u4F5C\uFF0C\u6BD4\u5982\u4E3A\u96C6\u5408\u586B\u5145\u503C\u3002\u6765\u770B\u4E0B\u9762\u8FD9\u6BB5\u4EE3\u7801\u3002\u201D</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">Bike</span> <span class="token punctuation">{</span>
diff --git a/dist/assets/collection.html.d1a47d1f.js b/dist/assets/collection.html.e1c47b4b.js
similarity index 99%
rename from dist/assets/collection.html.d1a47d1f.js
rename to dist/assets/collection.html.e1c47b4b.js
index 7d749ace..b885a6a0 100644
--- a/dist/assets/collection.html.d1a47d1f.js
+++ b/dist/assets/collection.html.e1c47b4b.js
@@ -1,4 +1,4 @@
-import{_ as p}from"./plugin-vue_export-helper.21dcd24c.js";import{r as o,o as c,c as l,a,b as e,d as n,e as t}from"./app.a0271b9c.js";const i={},r=a("h1",{id:"\u9762\u6E23\u9006\u88AD-java-\u96C6\u5408\u6846\u67B6\u7BC7-\u5FC5\u770B",tabindex:"-1"},[a("a",{class:"header-anchor",href:"#\u9762\u6E23\u9006\u88AD-java-\u96C6\u5408\u6846\u67B6\u7BC7-\u5FC5\u770B","aria-hidden":"true"},"#"),n(" \u9762\u6E23\u9006\u88AD\uFF08Java \u96C6\u5408\u6846\u67B6\u7BC7\uFF09\u5FC5\u770B\u{1F44D}")],-1),u=n("\u56FE\u6587\u8BE6\u89E3 30 \u9053Java\u96C6\u5408\u6846\u67B6\u9762\u8BD5\u9AD8\u9891\u9898\uFF0C\u8FD9\u6B21\u540A\u6253\u9762\u8BD5\u5B98\uFF0C\u6211\u89C9\u5F97\u7A33\u4E86\uFF08\u624B\u52A8 dog\uFF09\u3002\u6574\u7406\uFF1A\u6C89\u9ED8\u738B\u4E8C\uFF0C\u6233"),d={href:"https://mp.weixin.qq.com/s/ptbM0EqlnCWeWm9VdSCDLg",target:"_blank",rel:"noopener noreferrer"},k=n("\u8F6C\u8F7D\u94FE\u63A5"),h=n("\uFF0C\u4F5C\u8005\uFF1A\u4E09\u5206\u6076\uFF0C\u6233"),b={href:"https://mp.weixin.qq.com/s/SHkQ7LEOT0itt4bXMoDBPw",target:"_blank",rel:"noopener noreferrer"},m=n("\u539F\u6587\u94FE\u63A5"),v=n("\u3002"),g=t(`<h2 id="\u5F15\u8A00" tabindex="-1"><a class="header-anchor" href="#\u5F15\u8A00" aria-hidden="true">#</a> \u5F15\u8A00</h2><h3 id="_1-\u8BF4\u8BF4\u6709\u54EA\u4E9B\u5E38\u89C1\u96C6\u5408" tabindex="-1"><a class="header-anchor" href="#_1-\u8BF4\u8BF4\u6709\u54EA\u4E9B\u5E38\u89C1\u96C6\u5408" aria-hidden="true">#</a> 1.\u8BF4\u8BF4\u6709\u54EA\u4E9B\u5E38\u89C1\u96C6\u5408\uFF1F</h3><p>\u96C6\u5408\u76F8\u5173\u7C7B\u548C\u63A5\u53E3\u90FD\u5728java.util\u4E2D\uFF0C\u4E3B\u8981\u5206\u4E3A3\u79CD\uFF1AList\uFF08\u5217\u8868\uFF09\u3001Map\uFF08\u6620\u5C04\uFF09\u3001Set(\u96C6)\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/collection-1.png" alt="Java\u96C6\u5408\u4E3B\u8981\u5173\u7CFB"></p><p>\u5176\u4E2D<code>Collection</code>\u662F\u96C6\u5408<code>List</code>\u3001<code>Set</code>\u7684\u7236\u63A5\u53E3\uFF0C\u5B83\u4E3B\u8981\u6709\u4E24\u4E2A\u5B50\u63A5\u53E3\uFF1A</p><ul><li><code>List</code>\uFF1A\u5B58\u50A8\u7684\u5143\u7D20\u6709\u5E8F\uFF0C\u53EF\u91CD\u590D\u3002</li><li><code>Set</code>\uFF1A\u5B58\u50A8\u7684\u5143\u7D20\u4E0D\u65E0\u5E8F\uFF0C\u4E0D\u53EF\u91CD\u590D\u3002</li></ul><p><code>Map</code>\u662F\u53E6\u5916\u7684\u63A5\u53E3\uFF0C\u662F\u952E\u503C\u5BF9\u6620\u5C04\u7ED3\u6784\u7684\u96C6\u5408\u3002</p><h2 id="list" tabindex="-1"><a class="header-anchor" href="#list" aria-hidden="true">#</a> List</h2><p>List\uFF0C\u4E5F\u6CA1\u5565\u597D\u95EE\u7684\uFF0C\u4F46\u4E0D\u6392\u9664\u9762\u8BD5\u5B98\u5251\u8D70\u504F\u950B\uFF0C\u6BD4\u5982\u9762\u8BD5\u5B98\u4E5F\u770B\u4E86\u6211\u8FD9\u7BC7\u6587\u7AE0\u3002</p><h3 id="_2-arraylist\u548Clinkedlist\u6709\u4EC0\u4E48\u533A\u522B" tabindex="-1"><a class="header-anchor" href="#_2-arraylist\u548Clinkedlist\u6709\u4EC0\u4E48\u533A\u522B" aria-hidden="true">#</a> 2.ArrayList\u548CLinkedList\u6709\u4EC0\u4E48\u533A\u522B\uFF1F</h3><p>**\uFF081\uFF09**\u6570\u636E\u7ED3\u6784\u4E0D\u540C</p><ul><li>ArrayList\u57FA\u4E8E\u6570\u7EC4\u5B9E\u73B0</li><li>LinkedList\u57FA\u4E8E\u53CC\u5411\u94FE\u8868\u5B9E\u73B0</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/collection-2.png" alt="ArrayList\u548CLinkedList\u7684\u6570\u636E\u7ED3\u6784"></p><p><strong>\uFF082\uFF09</strong> \u591A\u6570\u60C5\u51B5\u4E0B\uFF0CArrayList\u66F4\u5229\u4E8E\u67E5\u627E\uFF0CLinkedList\u66F4\u5229\u4E8E\u589E\u5220</p><ul><li><p>ArrayList\u57FA\u4E8E\u6570\u7EC4\u5B9E\u73B0\uFF0Cget(int index)\u53EF\u4EE5\u76F4\u63A5\u901A\u8FC7\u6570\u7EC4\u4E0B\u6807\u83B7\u53D6\uFF0C\u65F6\u95F4\u590D\u6742\u5EA6\u662FO(1)\uFF1BLinkedList\u57FA\u4E8E\u94FE\u8868\u5B9E\u73B0\uFF0Cget(int index)\u9700\u8981\u904D\u5386\u94FE\u8868\uFF0C\u65F6\u95F4\u590D\u6742\u5EA6\u662FO(n)\uFF1B\u5F53\u7136\uFF0Cget(E element)\u8FD9\u79CD\u67E5\u627E\uFF0C\u4E24\u79CD\u96C6\u5408\u90FD\u9700\u8981\u904D\u5386\uFF0C\u65F6\u95F4\u590D\u6742\u5EA6\u90FD\u662FO(n)\u3002</p></li><li><p>ArrayList\u589E\u5220\u5982\u679C\u662F\u6570\u7EC4\u672B\u5C3E\u7684\u4F4D\u7F6E\uFF0C\u76F4\u63A5\u63D2\u5165\u6216\u8005\u5220\u9664\u5C31\u53EF\u4EE5\u4E86\uFF0C\u4F46\u662F\u5982\u679C\u63D2\u5165\u4E2D\u95F4\u7684\u4F4D\u7F6E\uFF0C\u5C31\u9700\u8981\u628A\u63D2\u5165\u4F4D\u7F6E\u540E\u7684\u5143\u7D20\u90FD\u5411\u524D\u6216\u8005\u5411\u540E\u79FB\u52A8\uFF0C\u751A\u81F3\u8FD8\u6709\u53EF\u80FD\u89E6\u53D1\u6269\u5BB9\uFF1B\u53CC\u5411\u94FE\u8868\u7684\u63D2\u5165\u548C\u5220\u9664\u53EA\u9700\u8981\u6539\u53D8\u524D\u9A71\u8282\u70B9\u3001\u540E\u7EE7\u8282\u70B9\u548C\u63D2\u5165\u8282\u70B9\u7684\u6307\u5411\u5C31\u884C\u4E86\uFF0C\u4E0D\u9700\u8981\u79FB\u52A8\u5143\u7D20\u3002</p></li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/collection-3.png" alt="ArrayList\u548CLinkedList\u4E2D\u95F4\u63D2\u5165"></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/collection-4.png" alt="ArrayList\u548CLinkedList\u4E2D\u95F4\u5220\u9664"></p><blockquote><p>\u6CE8\u610F\uFF0C\u8FD9\u4E2A\u5730\u65B9\u53EF\u80FD\u4F1A\u51FA\u9677\u9631\uFF0CLinkedList\u66F4\u5229\u4E8E\u589E\u5220\u66F4\u591A\u662F\u4F53\u73B0\u5728\u5E73\u5747\u6B65\u957F\u4E0A\uFF0C\u4E0D\u662F\u4F53\u73B0\u5728\u65F6\u95F4\u590D\u6742\u5EA6\u4E0A\uFF0C\u4E8C\u8005\u589E\u5220\u7684\u65F6\u95F4\u590D\u6742\u5EA6\u90FD\u662FO(n)</p></blockquote><p>**\uFF083\uFF09**\u662F\u5426\u652F\u6301\u968F\u673A\u8BBF\u95EE</p><ul><li>ArrayList\u57FA\u4E8E\u6570\u7EC4\uFF0C\u6240\u4EE5\u5B83\u53EF\u4EE5\u6839\u636E\u4E0B\u6807\u67E5\u627E\uFF0C\u652F\u6301\u968F\u673A\u8BBF\u95EE\uFF0C\u5F53\u7136\uFF0C\u5B83\u4E5F\u5B9E\u73B0\u4E86RandmoAccess \u63A5\u53E3\uFF0C\u8FD9\u4E2A\u63A5\u53E3\u53EA\u662F\u7528\u6765\u6807\u8BC6\u662F\u5426\u652F\u6301\u968F\u673A\u8BBF\u95EE\u3002</li><li>LinkedList\u57FA\u4E8E\u94FE\u8868\uFF0C\u6240\u4EE5\u5B83\u6CA1\u6CD5\u6839\u636E\u5E8F\u53F7\u76F4\u63A5\u83B7\u53D6\u5143\u7D20\uFF0C\u5B83\u6CA1\u6709\u5B9E\u73B0RandmoAccess \u63A5\u53E3\uFF0C\u6807\u8BB0\u4E0D\u652F\u6301\u968F\u673A\u8BBF\u95EE\u3002</li></ul><p>**\uFF084\uFF09**\u5185\u5B58\u5360\u7528\uFF0CArrayList\u57FA\u4E8E\u6570\u7EC4\uFF0C\u662F\u4E00\u5757\u8FDE\u7EED\u7684\u5185\u5B58\u7A7A\u95F4\uFF0CLinkedList\u57FA\u4E8E\u94FE\u8868\uFF0C\u5185\u5B58\u7A7A\u95F4\u4E0D\u8FDE\u7EED\uFF0C\u5B83\u4EEC\u5728\u7A7A\u95F4\u5360\u7528\u4E0A\u90FD\u6709\u4E00\u4E9B\u989D\u5916\u7684\u6D88\u8017\uFF1A</p><ul><li>ArrayList\u662F\u9884\u5148\u5B9A\u4E49\u597D\u7684\u6570\u7EC4\uFF0C\u53EF\u80FD\u4F1A\u6709\u7A7A\u7684\u5185\u5B58\u7A7A\u95F4\uFF0C\u5B58\u5728\u4E00\u5B9A\u7A7A\u95F4\u6D6A\u8D39</li><li>LinkedList\u6BCF\u4E2A\u8282\u70B9\uFF0C\u9700\u8981\u5B58\u50A8\u524D\u9A71\u548C\u540E\u7EE7\uFF0C\u6240\u4EE5\u6BCF\u4E2A\u8282\u70B9\u4F1A\u5360\u7528\u66F4\u591A\u7684\u7A7A\u95F4</li></ul><h3 id="_3-arraylist\u7684\u6269\u5BB9\u673A\u5236\u4E86\u89E3\u5417" tabindex="-1"><a class="header-anchor" href="#_3-arraylist\u7684\u6269\u5BB9\u673A\u5236\u4E86\u89E3\u5417" aria-hidden="true">#</a> 3.ArrayList\u7684\u6269\u5BB9\u673A\u5236\u4E86\u89E3\u5417\uFF1F</h3><p>ArrayList\u662F\u57FA\u4E8E\u6570\u7EC4\u7684\u96C6\u5408\uFF0C\u6570\u7EC4\u7684\u5BB9\u91CF\u662F\u5728\u5B9A\u4E49\u7684\u65F6\u5019\u786E\u5B9A\u7684\uFF0C\u5982\u679C\u6570\u7EC4\u6EE1\u4E86\uFF0C\u518D\u63D2\u5165\uFF0C\u5C31\u4F1A\u6570\u7EC4\u6EA2\u51FA\u3002\u6240\u4EE5\u5728\u63D2\u5165\u65F6\u5019\uFF0C\u4F1A\u5148\u68C0\u67E5\u662F\u5426\u9700\u8981\u6269\u5BB9\uFF0C\u5982\u679C\u5F53\u524D\u5BB9\u91CF+1\u8D85\u8FC7\u6570\u7EC4\u957F\u5EA6\uFF0C\u5C31\u4F1A\u8FDB\u884C\u6269\u5BB9\u3002</p><p>ArrayList\u7684\u6269\u5BB9\u662F\u521B\u5EFA\u4E00\u4E2A<strong>1.5\u500D</strong>\u7684\u65B0\u6570\u7EC4\uFF0C\u7136\u540E\u628A\u539F\u6570\u7EC4\u7684\u503C\u62F7\u8D1D\u8FC7\u53BB\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/collection-5.png" alt="ArrayList\u6269\u5BB9"></p><h3 id="_4-arraylist\u600E\u4E48\u5E8F\u5217\u5316\u7684\u77E5\u9053\u5417-\u4E3A\u4EC0\u4E48\u7528transient\u4FEE\u9970\u6570\u7EC4" tabindex="-1"><a class="header-anchor" href="#_4-arraylist\u600E\u4E48\u5E8F\u5217\u5316\u7684\u77E5\u9053\u5417-\u4E3A\u4EC0\u4E48\u7528transient\u4FEE\u9970\u6570\u7EC4" aria-hidden="true">#</a> 4.ArrayList\u600E\u4E48\u5E8F\u5217\u5316\u7684\u77E5\u9053\u5417\uFF1F \u4E3A\u4EC0\u4E48\u7528transient\u4FEE\u9970\u6570\u7EC4\uFF1F</h3><p>ArrayList\u7684\u5E8F\u5217\u5316\u4E0D\u592A\u4E00\u6837\uFF0C\u5B83\u4F7F\u7528<code>transient</code>\u4FEE\u9970\u5B58\u50A8\u5143\u7D20\u7684<code>elementData</code>\u7684\u6570\u7EC4\uFF0C<code>transient</code>\u5173\u952E\u5B57\u7684\u4F5C\u7528\u662F\u8BA9\u88AB\u4FEE\u9970\u7684\u6210\u5458\u5C5E\u6027\u4E0D\u88AB\u5E8F\u5217\u5316\u3002</p><p><strong>\u4E3A\u4EC0\u4E48\u6700ArrayList\u4E0D\u76F4\u63A5\u5E8F\u5217\u5316\u5143\u7D20\u6570\u7EC4\u5462\uFF1F</strong></p><p>\u51FA\u4E8E\u6548\u7387\u7684\u8003\u8651\uFF0C\u6570\u7EC4\u53EF\u80FD\u957F\u5EA6100\uFF0C\u4F46\u5B9E\u9645\u53EA\u7528\u4E8650\uFF0C\u5269\u4E0B\u768450\u4E0D\u7528\u5176\u5B9E\u4E0D\u7528\u5E8F\u5217\u5316\uFF0C\u8FD9\u6837\u53EF\u4EE5\u63D0\u9AD8\u5E8F\u5217\u5316\u548C\u53CD\u5E8F\u5217\u5316\u7684\u6548\u7387\uFF0C\u8FD8\u53EF\u4EE5\u8282\u7701\u5185\u5B58\u7A7A\u95F4\u3002</p><p><strong>\u90A3ArrayList\u600E\u4E48\u5E8F\u5217\u5316\u5462\uFF1F</strong></p><p>ArrayList\u901A\u8FC7\u4E24\u4E2A\u65B9\u6CD5<strong>readObject\u3001writeObject</strong>\u81EA\u5B9A\u4E49\u5E8F\u5217\u5316\u548C\u53CD\u5E8F\u5217\u5316\u7B56\u7565\uFF0C\u5B9E\u9645\u76F4\u63A5\u4F7F\u7528\u4E24\u4E2A\u6D41<code>ObjectOutputStream</code>\u548C<code>ObjectInputStream</code>\u6765\u8FDB\u884C\u5E8F\u5217\u5316\u548C\u53CD\u5E8F\u5217\u5316\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/collection-6.png" alt="ArrayList\u81EA\u5B9A\u4E49\u5E8F\u5217\u5316"></p><h3 id="_5-\u5FEB\u901F\u5931\u8D25-fail-fast-\u548C\u5B89\u5168\u5931\u8D25-fail-safe-\u4E86\u89E3\u5417" tabindex="-1"><a class="header-anchor" href="#_5-\u5FEB\u901F\u5931\u8D25-fail-fast-\u548C\u5B89\u5168\u5931\u8D25-fail-safe-\u4E86\u89E3\u5417" aria-hidden="true">#</a> 5.\u5FEB\u901F\u5931\u8D25(fail-fast)\u548C\u5B89\u5168\u5931\u8D25(fail-safe)\u4E86\u89E3\u5417\uFF1F</h3><p><strong>\u5FEB\u901F\u5931\u8D25\uFF08fail\u2014fast\uFF09</strong>\uFF1A\u5FEB\u901F\u5931\u8D25\u662FJava\u96C6\u5408\u7684\u4E00\u79CD\u9519\u8BEF\u68C0\u6D4B\u673A\u5236</p><ul><li>\u5728\u7528\u8FED\u4EE3\u5668\u904D\u5386\u4E00\u4E2A\u96C6\u5408\u5BF9\u8C61\u65F6\uFF0C\u5982\u679C\u7EBF\u7A0BA\u904D\u5386\u8FC7\u7A0B\u4E2D\uFF0C\u7EBF\u7A0BB\u5BF9\u96C6\u5408\u5BF9\u8C61\u7684\u5185\u5BB9\u8FDB\u884C\u4E86\u4FEE\u6539\uFF08\u589E\u52A0\u3001\u5220\u9664\u3001\u4FEE\u6539\uFF09\uFF0C\u5219\u4F1A\u629B\u51FAConcurrent Modification Exception\u3002</li><li>\u539F\u7406\uFF1A\u8FED\u4EE3\u5668\u5728\u904D\u5386\u65F6\u76F4\u63A5\u8BBF\u95EE\u96C6\u5408\u4E2D\u7684\u5185\u5BB9\uFF0C\u5E76\u4E14\u5728\u904D\u5386\u8FC7\u7A0B\u4E2D\u4F7F\u7528\u4E00\u4E2A <code> modCount</code> \u53D8\u91CF\u3002\u96C6\u5408\u5728\u88AB\u904D\u5386\u671F\u95F4\u5982\u679C\u5185\u5BB9\u53D1\u751F\u53D8\u5316\uFF0C\u5C31\u4F1A\u6539\u53D8<code>modCount</code>\u7684\u503C\u3002\u6BCF\u5F53\u8FED\u4EE3\u5668\u4F7F\u7528hashNext()/next()\u904D\u5386\u4E0B\u4E00\u4E2A\u5143\u7D20\u4E4B\u524D\uFF0C\u90FD\u4F1A\u68C0\u6D4BmodCount\u53D8\u91CF\u662F\u5426\u4E3AexpectedmodCount\u503C\uFF0C\u662F\u7684\u8BDD\u5C31\u8FD4\u56DE\u904D\u5386\uFF1B\u5426\u5219\u629B\u51FA\u5F02\u5E38\uFF0C\u7EC8\u6B62\u904D\u5386\u3002</li><li>\u6CE8\u610F\uFF1A\u8FD9\u91CC\u5F02\u5E38\u7684\u629B\u51FA\u6761\u4EF6\u662F\u68C0\u6D4B\u5230 modCount\uFF01=expectedmodCount \u8FD9\u4E2A\u6761\u4EF6\u3002\u5982\u679C\u96C6\u5408\u53D1\u751F\u53D8\u5316\u65F6\u4FEE\u6539modCount\u503C\u521A\u597D\u53C8\u8BBE\u7F6E\u4E3A\u4E86expectedmodCount\u503C\uFF0C\u5219\u5F02\u5E38\u4E0D\u4F1A\u629B\u51FA\u3002\u56E0\u6B64\uFF0C\u4E0D\u80FD\u4F9D\u8D56\u4E8E\u8FD9\u4E2A\u5F02\u5E38\u662F\u5426\u629B\u51FA\u800C\u8FDB\u884C\u5E76\u53D1\u64CD\u4F5C\u7684\u7F16\u7A0B\uFF0C\u8FD9\u4E2A\u5F02\u5E38\u53EA\u5EFA\u8BAE\u7528\u4E8E\u68C0\u6D4B\u5E76\u53D1\u4FEE\u6539\u7684bug\u3002</li><li>\u573A\u666F\uFF1Ajava.util\u5305\u4E0B\u7684\u96C6\u5408\u7C7B\u90FD\u662F\u5FEB\u901F\u5931\u8D25\u7684\uFF0C\u4E0D\u80FD\u5728\u591A\u7EBF\u7A0B\u4E0B\u53D1\u751F\u5E76\u53D1\u4FEE\u6539\uFF08\u8FED\u4EE3\u8FC7\u7A0B\u4E2D\u88AB\u4FEE\u6539\uFF09\uFF0C\u6BD4\u5982ArrayList \u7C7B\u3002</li></ul><p><strong>\u5B89\u5168\u5931\u8D25\uFF08fail\u2014safe\uFF09</strong></p><ul><li>\u91C7\u7528\u5B89\u5168\u5931\u8D25\u673A\u5236\u7684\u96C6\u5408\u5BB9\u5668\uFF0C\u5728\u904D\u5386\u65F6\u4E0D\u662F\u76F4\u63A5\u5728\u96C6\u5408\u5185\u5BB9\u4E0A\u8BBF\u95EE\u7684\uFF0C\u800C\u662F\u5148\u590D\u5236\u539F\u6709\u96C6\u5408\u5185\u5BB9\uFF0C\u5728\u62F7\u8D1D\u7684\u96C6\u5408\u4E0A\u8FDB\u884C\u904D\u5386\u3002</li><li>\u539F\u7406\uFF1A\u7531\u4E8E\u8FED\u4EE3\u65F6\u662F\u5BF9\u539F\u96C6\u5408\u7684\u62F7\u8D1D\u8FDB\u884C\u904D\u5386\uFF0C\u6240\u4EE5\u5728\u904D\u5386\u8FC7\u7A0B\u4E2D\u5BF9\u539F\u96C6\u5408\u6240\u4F5C\u7684\u4FEE\u6539\u5E76\u4E0D\u80FD\u88AB\u8FED\u4EE3\u5668\u68C0\u6D4B\u5230\uFF0C\u6240\u4EE5\u4E0D\u4F1A\u89E6\u53D1Concurrent Modification Exception\u3002</li><li>\u7F3A\u70B9\uFF1A\u57FA\u4E8E\u62F7\u8D1D\u5185\u5BB9\u7684\u4F18\u70B9\u662F\u907F\u514D\u4E86Concurrent Modification Exception\uFF0C\u4F46\u540C\u6837\u5730\uFF0C\u8FED\u4EE3\u5668\u5E76\u4E0D\u80FD\u8BBF\u95EE\u5230\u4FEE\u6539\u540E\u7684\u5185\u5BB9\uFF0C\u5373\uFF1A\u8FED\u4EE3\u5668\u904D\u5386\u7684\u662F\u5F00\u59CB\u904D\u5386\u90A3\u4E00\u523B\u62FF\u5230\u7684\u96C6\u5408\u62F7\u8D1D\uFF0C\u5728\u904D\u5386\u671F\u95F4\u539F\u96C6\u5408\u53D1\u751F\u7684\u4FEE\u6539\u8FED\u4EE3\u5668\u662F\u4E0D\u77E5\u9053\u7684\u3002</li><li>\u573A\u666F\uFF1Ajava.util.concurrent\u5305\u4E0B\u7684\u5BB9\u5668\u90FD\u662F\u5B89\u5168\u5931\u8D25\uFF0C\u53EF\u4EE5\u5728\u591A\u7EBF\u7A0B\u4E0B\u5E76\u53D1\u4F7F\u7528\uFF0C\u5E76\u53D1\u4FEE\u6539\uFF0C\u6BD4\u5982CopyOnWriteArrayList\u7C7B\u3002</li></ul><h3 id="_6-\u6709\u54EA\u51E0\u79CD\u5B9E\u73B0arraylist\u7EBF\u7A0B\u5B89\u5168\u7684\u65B9\u6CD5" tabindex="-1"><a class="header-anchor" href="#_6-\u6709\u54EA\u51E0\u79CD\u5B9E\u73B0arraylist\u7EBF\u7A0B\u5B89\u5168\u7684\u65B9\u6CD5" aria-hidden="true">#</a> 6.\u6709\u54EA\u51E0\u79CD\u5B9E\u73B0ArrayList\u7EBF\u7A0B\u5B89\u5168\u7684\u65B9\u6CD5\uFF1F</h3><p>fail-fast\u662F\u4E00\u79CD\u53EF\u80FD\u89E6\u53D1\u7684\u673A\u5236\uFF0C\u5B9E\u9645\u4E0A\uFF0CArrayList\u7684\u7EBF\u7A0B\u5B89\u5168\u4ECD\u7136\u6CA1\u6709\u4FDD\u8BC1\uFF0C\u4E00\u822C\uFF0C\u4FDD\u8BC1ArrayList\u7684\u7EBF\u7A0B\u5B89\u5168\u53EF\u4EE5\u901A\u8FC7\u8FD9\u4E9B\u65B9\u6848\uFF1A</p><ul><li>\u4F7F\u7528 Vector \u4EE3\u66FF ArrayList\u3002\uFF08\u4E0D\u63A8\u8350\uFF0CVector\u662F\u4E00\u4E2A\u5386\u53F2\u9057\u7559\u7C7B\uFF09</li><li>\u4F7F\u7528 Collections.synchronizedList \u5305\u88C5 ArrayList\uFF0C\u7136\u540E\u64CD\u4F5C\u5305\u88C5\u540E\u7684 list\u3002</li><li>\u4F7F\u7528 CopyOnWriteArrayList \u4EE3\u66FF ArrayList\u3002</li><li>\u5728\u4F7F\u7528 ArrayList \u65F6\uFF0C\u5E94\u7528\u7A0B\u5E8F\u901A\u8FC7\u540C\u6B65\u673A\u5236\u53BB\u63A7\u5236 ArrayList \u7684\u8BFB\u5199\u3002</li></ul><h3 id="_7-copyonwritearraylist\u4E86\u89E3\u591A\u5C11" tabindex="-1"><a class="header-anchor" href="#_7-copyonwritearraylist\u4E86\u89E3\u591A\u5C11" aria-hidden="true">#</a> 7.CopyOnWriteArrayList\u4E86\u89E3\u591A\u5C11\uFF1F</h3><p>CopyOnWriteArrayList\u5C31\u662F\u7EBF\u7A0B\u5B89\u5168\u7248\u672C\u7684ArrayList\u3002</p><p>\u5B83\u7684\u540D\u5B57\u53EB<code>CopyOnWrite</code>\u2014\u2014\u5199\u65F6\u590D\u5236\uFF0C\u5DF2\u7ECF\u660E\u793A\u4E86\u5B83\u7684\u539F\u7406\u3002</p><p>CopyOnWriteArrayList\u91C7\u7528\u4E86\u4E00\u79CD\u8BFB\u5199\u5206\u79BB\u7684\u5E76\u53D1\u7B56\u7565\u3002CopyOnWriteArrayList\u5BB9\u5668\u5141\u8BB8\u5E76\u53D1\u8BFB\uFF0C\u8BFB\u64CD\u4F5C\u662F\u65E0\u9501\u7684\uFF0C\u6027\u80FD\u8F83\u9AD8\u3002\u81F3\u4E8E\u5199\u64CD\u4F5C\uFF0C\u6BD4\u5982\u5411\u5BB9\u5668\u4E2D\u6DFB\u52A0\u4E00\u4E2A\u5143\u7D20\uFF0C\u5219\u9996\u5148\u5C06\u5F53\u524D\u5BB9\u5668\u590D\u5236\u4E00\u4EFD\uFF0C\u7136\u540E\u5728\u65B0\u526F\u672C\u4E0A\u6267\u884C\u5199\u64CD\u4F5C\uFF0C\u7ED3\u675F\u4E4B\u540E\u518D\u5C06\u539F\u5BB9\u5668\u7684\u5F15\u7528\u6307\u5411\u65B0\u5BB9\u5668\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/collection-7.png" alt="CopyOnWriteArrayList\u539F\u7406"></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><h2 id="map" tabindex="-1"><a class="header-anchor" href="#map" aria-hidden="true">#</a> Map</h2><p>Map\u4E2D\uFF0C\u6BEB\u65E0\u7591\u95EE\uFF0C\u6700\u91CD\u8981\u7684\u5C31\u662FHashMap\uFF0C\u9762\u8BD5\u57FA\u672C\u88AB\u76D8\u51FA\u5305\u6D46\u4E86\uFF0C\u5404\u79CD\u95EE\u6CD5\uFF0C\u4E00\u5B9A\u8981\u597D\u597D\u51C6\u5907\u3002</p><h3 id="_8-\u80FD\u8BF4\u4E00\u4E0Bhashmap\u7684\u6570\u636E\u7ED3\u6784\u5417" tabindex="-1"><a class="header-anchor" href="#_8-\u80FD\u8BF4\u4E00\u4E0Bhashmap\u7684\u6570\u636E\u7ED3\u6784\u5417" aria-hidden="true">#</a> 8.\u80FD\u8BF4\u4E00\u4E0BHashMap\u7684\u6570\u636E\u7ED3\u6784\u5417\uFF1F</h3><p>JDK1.7\u7684\u6570\u636E\u7ED3\u6784\u662F<code>\u6570\u7EC4</code>+<code>\u94FE\u8868</code>\uFF0CJDK1.7\u8FD8\u6709\u4EBA\u5728\u7528\uFF1F\u4E0D\u4F1A\u5427\u2026\u2026</p><p>\u8BF4\u4E00\u4E0BJDK1.8\u7684\u6570\u636E\u7ED3\u6784\u5427\uFF1A</p><p>JDK1.8\u7684\u6570\u636E\u7ED3\u6784\u662F<code>\u6570\u7EC4</code>+<code>\u94FE\u8868</code>+<code>\u7EA2\u9ED1\u6811</code>\u3002</p><p>\u6570\u636E\u7ED3\u6784\u793A\u610F\u56FE\u5982\u4E0B\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/collection-8.png" alt="jdk1.8 hashmap\u6570\u636E\u7ED3\u6784\u793A\u610F\u56FE"></p><p>\u5176\u4E2D\uFF0C\u6876\u6570\u7EC4\u662F\u7528\u6765\u5B58\u50A8\u6570\u636E\u5143\u7D20\uFF0C\u94FE\u8868\u662F\u7528\u6765\u89E3\u51B3\u51B2\u7A81\uFF0C\u7EA2\u9ED1\u6811\u662F\u4E3A\u4E86\u63D0\u9AD8\u67E5\u8BE2\u7684\u6548\u7387\u3002</p><ul><li>\u6570\u636E\u5143\u7D20\u901A\u8FC7\u6620\u5C04\u5173\u7CFB\uFF0C\u4E5F\u5C31\u662F\u6563\u5217\u51FD\u6570\uFF0C\u6620\u5C04\u5230\u6876\u6570\u7EC4\u5BF9\u5E94\u7D22\u5F15\u7684\u4F4D\u7F6E</li><li>\u5982\u679C\u53D1\u751F\u51B2\u7A81\uFF0C\u4ECE\u51B2\u7A81\u7684\u4F4D\u7F6E\u62C9\u4E00\u4E2A\u94FE\u8868\uFF0C\u63D2\u5165\u51B2\u7A81\u7684\u5143\u7D20</li><li>\u5982\u679C\u94FE\u8868\u957F\u5EA6&gt;8&amp;\u6570\u7EC4\u5927\u5C0F&gt;=64\uFF0C\u94FE\u8868\u8F6C\u4E3A\u7EA2\u9ED1\u6811</li><li>\u5982\u679C\u7EA2\u9ED1\u6811\u8282\u70B9\u4E2A\u6570&lt;6 \uFF0C\u8F6C\u4E3A\u94FE\u8868</li></ul><h3 id="_9-\u4F60\u5BF9\u7EA2\u9ED1\u6811\u4E86\u89E3\u591A\u5C11-\u4E3A\u4EC0\u4E48\u4E0D\u7528\u4E8C\u53C9\u6811-\u5E73\u8861\u6811\u5462" tabindex="-1"><a class="header-anchor" href="#_9-\u4F60\u5BF9\u7EA2\u9ED1\u6811\u4E86\u89E3\u591A\u5C11-\u4E3A\u4EC0\u4E48\u4E0D\u7528\u4E8C\u53C9\u6811-\u5E73\u8861\u6811\u5462" aria-hidden="true">#</a> 9.\u4F60\u5BF9\u7EA2\u9ED1\u6811\u4E86\u89E3\u591A\u5C11\uFF1F\u4E3A\u4EC0\u4E48\u4E0D\u7528\u4E8C\u53C9\u6811/\u5E73\u8861\u6811\u5462\uFF1F</h3><p>\u7EA2\u9ED1\u6811\u672C\u8D28\u4E0A\u662F\u4E00\u79CD\u4E8C\u53C9\u67E5\u627E\u6811\uFF0C\u4E3A\u4E86\u4FDD\u6301\u5E73\u8861\uFF0C\u5B83\u53C8\u5728\u4E8C\u53C9\u67E5\u627E\u6811\u7684\u57FA\u7840\u4E0A\u589E\u52A0\u4E86\u4E00\u4E9B\u89C4\u5219\uFF1A</p><ol><li>\u6BCF\u4E2A\u8282\u70B9\u8981\u4E48\u662F\u7EA2\u8272\uFF0C\u8981\u4E48\u662F\u9ED1\u8272\uFF1B</li><li>\u6839\u8282\u70B9\u6C38\u8FDC\u662F\u9ED1\u8272\u7684\uFF1B</li><li>\u6240\u6709\u7684\u53F6\u5B50\u8282\u70B9\u90FD\u662F\u662F\u9ED1\u8272\u7684\uFF08\u6CE8\u610F\u8FD9\u91CC\u8BF4\u53F6\u5B50\u8282\u70B9\u5176\u5B9E\u662F\u56FE\u4E2D\u7684 NULL \u8282\u70B9\uFF09\uFF1B</li><li>\u6BCF\u4E2A\u7EA2\u8272\u8282\u70B9\u7684\u4E24\u4E2A\u5B50\u8282\u70B9\u4E00\u5B9A\u90FD\u662F\u9ED1\u8272\uFF1B</li><li>\u4ECE\u4EFB\u4E00\u8282\u70B9\u5230\u5176\u5B50\u6811\u4E2D\u6BCF\u4E2A\u53F6\u5B50\u8282\u70B9\u7684\u8DEF\u5F84\u90FD\u5305\u542B\u76F8\u540C\u6570\u91CF\u7684\u9ED1\u8272\u8282\u70B9\uFF1B</li></ol><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/collection-9.png" alt="\u7EA2\u9ED1\u6811"></p><blockquote><p>\u4E4B\u6240\u4EE5\u4E0D\u7528\u4E8C\u53C9\u6811\uFF1A</p></blockquote><p>\u7EA2\u9ED1\u6811\u662F\u4E00\u79CD\u5E73\u8861\u7684\u4E8C\u53C9\u6811\uFF0C\u63D2\u5165\u3001\u5220\u9664\u3001\u67E5\u627E\u7684\u6700\u574F\u65F6\u95F4\u590D\u6742\u5EA6\u90FD\u4E3A O(logn)\uFF0C\u907F\u514D\u4E86\u4E8C\u53C9\u6811\u6700\u574F\u60C5\u51B5\u4E0B\u7684O(n)\u65F6\u95F4\u590D\u6742\u5EA6\u3002</p><blockquote><p>\u4E4B\u6240\u4EE5\u4E0D\u7528\u5E73\u8861\u4E8C\u53C9\u6811\uFF1A</p></blockquote><p>\u5E73\u8861\u4E8C\u53C9\u6811\u662F\u6BD4\u7EA2\u9ED1\u6811\u66F4\u4E25\u683C\u7684\u5E73\u8861\u6811\uFF0C\u4E3A\u4E86\u4FDD\u6301\u4FDD\u6301\u5E73\u8861\uFF0C\u9700\u8981\u65CB\u8F6C\u7684\u6B21\u6570\u66F4\u591A\uFF0C\u4E5F\u5C31\u662F\u8BF4\u5E73\u8861\u4E8C\u53C9\u6811\u4FDD\u6301\u5E73\u8861\u7684\u6548\u7387\u66F4\u4F4E\uFF0C\u6240\u4EE5\u5E73\u8861\u4E8C\u53C9\u6811\u63D2\u5165\u548C\u5220\u9664\u7684\u6548\u7387\u6BD4\u7EA2\u9ED1\u6811\u8981\u4F4E\u3002</p><h3 id="_10-\u7EA2\u9ED1\u6811\u600E\u4E48\u4FDD\u6301\u5E73\u8861\u7684\u77E5\u9053\u5417" tabindex="-1"><a class="header-anchor" href="#_10-\u7EA2\u9ED1\u6811\u600E\u4E48\u4FDD\u6301\u5E73\u8861\u7684\u77E5\u9053\u5417" aria-hidden="true">#</a> 10.\u7EA2\u9ED1\u6811\u600E\u4E48\u4FDD\u6301\u5E73\u8861\u7684\u77E5\u9053\u5417\uFF1F</h3><p>\u7EA2\u9ED1\u6811\u6709\u4E24\u79CD\u65B9\u5F0F\u4FDD\u6301\u5E73\u8861\uFF1A<code>\u65CB\u8F6C</code>\u548C<code>\u67D3\u8272</code>\u3002</p><ul><li>\u65CB\u8F6C\uFF1A\u65CB\u8F6C\u5206\u4E3A\u4E24\u79CD\uFF0C\u5DE6\u65CB\u548C\u53F3\u65CB</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/collection-10.png" alt="\u5DE6\u65CB"></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/collection-11.png" alt="\u53F3\u65CB"></p><ul><li>\u67D3\u2F8A\uFF1A</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/collection-12.png" alt="\u67D3\u8272"></p><h3 id="_11-hashmap\u7684put\u6D41\u7A0B\u77E5\u9053\u5417" tabindex="-1"><a class="header-anchor" href="#_11-hashmap\u7684put\u6D41\u7A0B\u77E5\u9053\u5417" aria-hidden="true">#</a> 11.HashMap\u7684put\u6D41\u7A0B\u77E5\u9053\u5417\uFF1F</h3><p>\u5148\u4E0A\u4E2A\u6D41\u7A0B\u56FE\u5427:</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/collection-13.jpg" alt="HashMap\u63D2\u5165\u6570\u636E\u6D41\u7A0B\u56FE"></p><ol><li><p>\u9996\u5148\u8FDB\u884C\u54C8\u5E0C\u503C\u7684\u6270\u52A8\uFF0C\u83B7\u53D6\u4E00\u4E2A\u65B0\u7684\u54C8\u5E0C\u503C\u3002<code>(key == null) ? 0 : (h = key.hashCode()) ^ (h &gt;&gt;&gt; 16);</code></p></li><li><p>\u5224\u65ADtab\u662F\u5426\u4F4D\u7A7A\u6216\u8005\u957F\u5EA6\u4E3A0\uFF0C\u5982\u679C\u662F\u5219\u8FDB\u884C\u6269\u5BB9\u64CD\u4F5C\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token punctuation">(</span>tab <span class="token operator">=</span> table<span class="token punctuation">)</span> <span class="token operator">==</span> <span class="token keyword">null</span> <span class="token operator">||</span> <span class="token punctuation">(</span>n <span class="token operator">=</span> tab<span class="token punctuation">.</span>length<span class="token punctuation">)</span> <span class="token operator">==</span> <span class="token number">0</span><span class="token punctuation">)</span>
+import{_ as p}from"./plugin-vue_export-helper.21dcd24c.js";import{r as o,o as c,c as l,a,b as e,d as n,e as t}from"./app.615e41d8.js";const i={},r=a("h1",{id:"\u9762\u6E23\u9006\u88AD-java-\u96C6\u5408\u6846\u67B6\u7BC7-\u5FC5\u770B",tabindex:"-1"},[a("a",{class:"header-anchor",href:"#\u9762\u6E23\u9006\u88AD-java-\u96C6\u5408\u6846\u67B6\u7BC7-\u5FC5\u770B","aria-hidden":"true"},"#"),n(" \u9762\u6E23\u9006\u88AD\uFF08Java \u96C6\u5408\u6846\u67B6\u7BC7\uFF09\u5FC5\u770B\u{1F44D}")],-1),u=n("\u56FE\u6587\u8BE6\u89E3 30 \u9053Java\u96C6\u5408\u6846\u67B6\u9762\u8BD5\u9AD8\u9891\u9898\uFF0C\u8FD9\u6B21\u540A\u6253\u9762\u8BD5\u5B98\uFF0C\u6211\u89C9\u5F97\u7A33\u4E86\uFF08\u624B\u52A8 dog\uFF09\u3002\u6574\u7406\uFF1A\u6C89\u9ED8\u738B\u4E8C\uFF0C\u6233"),d={href:"https://mp.weixin.qq.com/s/ptbM0EqlnCWeWm9VdSCDLg",target:"_blank",rel:"noopener noreferrer"},k=n("\u8F6C\u8F7D\u94FE\u63A5"),h=n("\uFF0C\u4F5C\u8005\uFF1A\u4E09\u5206\u6076\uFF0C\u6233"),b={href:"https://mp.weixin.qq.com/s/SHkQ7LEOT0itt4bXMoDBPw",target:"_blank",rel:"noopener noreferrer"},m=n("\u539F\u6587\u94FE\u63A5"),v=n("\u3002"),g=t(`<h2 id="\u5F15\u8A00" tabindex="-1"><a class="header-anchor" href="#\u5F15\u8A00" aria-hidden="true">#</a> \u5F15\u8A00</h2><h3 id="_1-\u8BF4\u8BF4\u6709\u54EA\u4E9B\u5E38\u89C1\u96C6\u5408" tabindex="-1"><a class="header-anchor" href="#_1-\u8BF4\u8BF4\u6709\u54EA\u4E9B\u5E38\u89C1\u96C6\u5408" aria-hidden="true">#</a> 1.\u8BF4\u8BF4\u6709\u54EA\u4E9B\u5E38\u89C1\u96C6\u5408\uFF1F</h3><p>\u96C6\u5408\u76F8\u5173\u7C7B\u548C\u63A5\u53E3\u90FD\u5728java.util\u4E2D\uFF0C\u4E3B\u8981\u5206\u4E3A3\u79CD\uFF1AList\uFF08\u5217\u8868\uFF09\u3001Map\uFF08\u6620\u5C04\uFF09\u3001Set(\u96C6)\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/collection-1.png" alt="Java\u96C6\u5408\u4E3B\u8981\u5173\u7CFB"></p><p>\u5176\u4E2D<code>Collection</code>\u662F\u96C6\u5408<code>List</code>\u3001<code>Set</code>\u7684\u7236\u63A5\u53E3\uFF0C\u5B83\u4E3B\u8981\u6709\u4E24\u4E2A\u5B50\u63A5\u53E3\uFF1A</p><ul><li><code>List</code>\uFF1A\u5B58\u50A8\u7684\u5143\u7D20\u6709\u5E8F\uFF0C\u53EF\u91CD\u590D\u3002</li><li><code>Set</code>\uFF1A\u5B58\u50A8\u7684\u5143\u7D20\u4E0D\u65E0\u5E8F\uFF0C\u4E0D\u53EF\u91CD\u590D\u3002</li></ul><p><code>Map</code>\u662F\u53E6\u5916\u7684\u63A5\u53E3\uFF0C\u662F\u952E\u503C\u5BF9\u6620\u5C04\u7ED3\u6784\u7684\u96C6\u5408\u3002</p><h2 id="list" tabindex="-1"><a class="header-anchor" href="#list" aria-hidden="true">#</a> List</h2><p>List\uFF0C\u4E5F\u6CA1\u5565\u597D\u95EE\u7684\uFF0C\u4F46\u4E0D\u6392\u9664\u9762\u8BD5\u5B98\u5251\u8D70\u504F\u950B\uFF0C\u6BD4\u5982\u9762\u8BD5\u5B98\u4E5F\u770B\u4E86\u6211\u8FD9\u7BC7\u6587\u7AE0\u3002</p><h3 id="_2-arraylist\u548Clinkedlist\u6709\u4EC0\u4E48\u533A\u522B" tabindex="-1"><a class="header-anchor" href="#_2-arraylist\u548Clinkedlist\u6709\u4EC0\u4E48\u533A\u522B" aria-hidden="true">#</a> 2.ArrayList\u548CLinkedList\u6709\u4EC0\u4E48\u533A\u522B\uFF1F</h3><p>**\uFF081\uFF09**\u6570\u636E\u7ED3\u6784\u4E0D\u540C</p><ul><li>ArrayList\u57FA\u4E8E\u6570\u7EC4\u5B9E\u73B0</li><li>LinkedList\u57FA\u4E8E\u53CC\u5411\u94FE\u8868\u5B9E\u73B0</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/collection-2.png" alt="ArrayList\u548CLinkedList\u7684\u6570\u636E\u7ED3\u6784"></p><p><strong>\uFF082\uFF09</strong> \u591A\u6570\u60C5\u51B5\u4E0B\uFF0CArrayList\u66F4\u5229\u4E8E\u67E5\u627E\uFF0CLinkedList\u66F4\u5229\u4E8E\u589E\u5220</p><ul><li><p>ArrayList\u57FA\u4E8E\u6570\u7EC4\u5B9E\u73B0\uFF0Cget(int index)\u53EF\u4EE5\u76F4\u63A5\u901A\u8FC7\u6570\u7EC4\u4E0B\u6807\u83B7\u53D6\uFF0C\u65F6\u95F4\u590D\u6742\u5EA6\u662FO(1)\uFF1BLinkedList\u57FA\u4E8E\u94FE\u8868\u5B9E\u73B0\uFF0Cget(int index)\u9700\u8981\u904D\u5386\u94FE\u8868\uFF0C\u65F6\u95F4\u590D\u6742\u5EA6\u662FO(n)\uFF1B\u5F53\u7136\uFF0Cget(E element)\u8FD9\u79CD\u67E5\u627E\uFF0C\u4E24\u79CD\u96C6\u5408\u90FD\u9700\u8981\u904D\u5386\uFF0C\u65F6\u95F4\u590D\u6742\u5EA6\u90FD\u662FO(n)\u3002</p></li><li><p>ArrayList\u589E\u5220\u5982\u679C\u662F\u6570\u7EC4\u672B\u5C3E\u7684\u4F4D\u7F6E\uFF0C\u76F4\u63A5\u63D2\u5165\u6216\u8005\u5220\u9664\u5C31\u53EF\u4EE5\u4E86\uFF0C\u4F46\u662F\u5982\u679C\u63D2\u5165\u4E2D\u95F4\u7684\u4F4D\u7F6E\uFF0C\u5C31\u9700\u8981\u628A\u63D2\u5165\u4F4D\u7F6E\u540E\u7684\u5143\u7D20\u90FD\u5411\u524D\u6216\u8005\u5411\u540E\u79FB\u52A8\uFF0C\u751A\u81F3\u8FD8\u6709\u53EF\u80FD\u89E6\u53D1\u6269\u5BB9\uFF1B\u53CC\u5411\u94FE\u8868\u7684\u63D2\u5165\u548C\u5220\u9664\u53EA\u9700\u8981\u6539\u53D8\u524D\u9A71\u8282\u70B9\u3001\u540E\u7EE7\u8282\u70B9\u548C\u63D2\u5165\u8282\u70B9\u7684\u6307\u5411\u5C31\u884C\u4E86\uFF0C\u4E0D\u9700\u8981\u79FB\u52A8\u5143\u7D20\u3002</p></li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/collection-3.png" alt="ArrayList\u548CLinkedList\u4E2D\u95F4\u63D2\u5165"></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/collection-4.png" alt="ArrayList\u548CLinkedList\u4E2D\u95F4\u5220\u9664"></p><blockquote><p>\u6CE8\u610F\uFF0C\u8FD9\u4E2A\u5730\u65B9\u53EF\u80FD\u4F1A\u51FA\u9677\u9631\uFF0CLinkedList\u66F4\u5229\u4E8E\u589E\u5220\u66F4\u591A\u662F\u4F53\u73B0\u5728\u5E73\u5747\u6B65\u957F\u4E0A\uFF0C\u4E0D\u662F\u4F53\u73B0\u5728\u65F6\u95F4\u590D\u6742\u5EA6\u4E0A\uFF0C\u4E8C\u8005\u589E\u5220\u7684\u65F6\u95F4\u590D\u6742\u5EA6\u90FD\u662FO(n)</p></blockquote><p>**\uFF083\uFF09**\u662F\u5426\u652F\u6301\u968F\u673A\u8BBF\u95EE</p><ul><li>ArrayList\u57FA\u4E8E\u6570\u7EC4\uFF0C\u6240\u4EE5\u5B83\u53EF\u4EE5\u6839\u636E\u4E0B\u6807\u67E5\u627E\uFF0C\u652F\u6301\u968F\u673A\u8BBF\u95EE\uFF0C\u5F53\u7136\uFF0C\u5B83\u4E5F\u5B9E\u73B0\u4E86RandmoAccess \u63A5\u53E3\uFF0C\u8FD9\u4E2A\u63A5\u53E3\u53EA\u662F\u7528\u6765\u6807\u8BC6\u662F\u5426\u652F\u6301\u968F\u673A\u8BBF\u95EE\u3002</li><li>LinkedList\u57FA\u4E8E\u94FE\u8868\uFF0C\u6240\u4EE5\u5B83\u6CA1\u6CD5\u6839\u636E\u5E8F\u53F7\u76F4\u63A5\u83B7\u53D6\u5143\u7D20\uFF0C\u5B83\u6CA1\u6709\u5B9E\u73B0RandmoAccess \u63A5\u53E3\uFF0C\u6807\u8BB0\u4E0D\u652F\u6301\u968F\u673A\u8BBF\u95EE\u3002</li></ul><p>**\uFF084\uFF09**\u5185\u5B58\u5360\u7528\uFF0CArrayList\u57FA\u4E8E\u6570\u7EC4\uFF0C\u662F\u4E00\u5757\u8FDE\u7EED\u7684\u5185\u5B58\u7A7A\u95F4\uFF0CLinkedList\u57FA\u4E8E\u94FE\u8868\uFF0C\u5185\u5B58\u7A7A\u95F4\u4E0D\u8FDE\u7EED\uFF0C\u5B83\u4EEC\u5728\u7A7A\u95F4\u5360\u7528\u4E0A\u90FD\u6709\u4E00\u4E9B\u989D\u5916\u7684\u6D88\u8017\uFF1A</p><ul><li>ArrayList\u662F\u9884\u5148\u5B9A\u4E49\u597D\u7684\u6570\u7EC4\uFF0C\u53EF\u80FD\u4F1A\u6709\u7A7A\u7684\u5185\u5B58\u7A7A\u95F4\uFF0C\u5B58\u5728\u4E00\u5B9A\u7A7A\u95F4\u6D6A\u8D39</li><li>LinkedList\u6BCF\u4E2A\u8282\u70B9\uFF0C\u9700\u8981\u5B58\u50A8\u524D\u9A71\u548C\u540E\u7EE7\uFF0C\u6240\u4EE5\u6BCF\u4E2A\u8282\u70B9\u4F1A\u5360\u7528\u66F4\u591A\u7684\u7A7A\u95F4</li></ul><h3 id="_3-arraylist\u7684\u6269\u5BB9\u673A\u5236\u4E86\u89E3\u5417" tabindex="-1"><a class="header-anchor" href="#_3-arraylist\u7684\u6269\u5BB9\u673A\u5236\u4E86\u89E3\u5417" aria-hidden="true">#</a> 3.ArrayList\u7684\u6269\u5BB9\u673A\u5236\u4E86\u89E3\u5417\uFF1F</h3><p>ArrayList\u662F\u57FA\u4E8E\u6570\u7EC4\u7684\u96C6\u5408\uFF0C\u6570\u7EC4\u7684\u5BB9\u91CF\u662F\u5728\u5B9A\u4E49\u7684\u65F6\u5019\u786E\u5B9A\u7684\uFF0C\u5982\u679C\u6570\u7EC4\u6EE1\u4E86\uFF0C\u518D\u63D2\u5165\uFF0C\u5C31\u4F1A\u6570\u7EC4\u6EA2\u51FA\u3002\u6240\u4EE5\u5728\u63D2\u5165\u65F6\u5019\uFF0C\u4F1A\u5148\u68C0\u67E5\u662F\u5426\u9700\u8981\u6269\u5BB9\uFF0C\u5982\u679C\u5F53\u524D\u5BB9\u91CF+1\u8D85\u8FC7\u6570\u7EC4\u957F\u5EA6\uFF0C\u5C31\u4F1A\u8FDB\u884C\u6269\u5BB9\u3002</p><p>ArrayList\u7684\u6269\u5BB9\u662F\u521B\u5EFA\u4E00\u4E2A<strong>1.5\u500D</strong>\u7684\u65B0\u6570\u7EC4\uFF0C\u7136\u540E\u628A\u539F\u6570\u7EC4\u7684\u503C\u62F7\u8D1D\u8FC7\u53BB\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/collection-5.png" alt="ArrayList\u6269\u5BB9"></p><h3 id="_4-arraylist\u600E\u4E48\u5E8F\u5217\u5316\u7684\u77E5\u9053\u5417-\u4E3A\u4EC0\u4E48\u7528transient\u4FEE\u9970\u6570\u7EC4" tabindex="-1"><a class="header-anchor" href="#_4-arraylist\u600E\u4E48\u5E8F\u5217\u5316\u7684\u77E5\u9053\u5417-\u4E3A\u4EC0\u4E48\u7528transient\u4FEE\u9970\u6570\u7EC4" aria-hidden="true">#</a> 4.ArrayList\u600E\u4E48\u5E8F\u5217\u5316\u7684\u77E5\u9053\u5417\uFF1F \u4E3A\u4EC0\u4E48\u7528transient\u4FEE\u9970\u6570\u7EC4\uFF1F</h3><p>ArrayList\u7684\u5E8F\u5217\u5316\u4E0D\u592A\u4E00\u6837\uFF0C\u5B83\u4F7F\u7528<code>transient</code>\u4FEE\u9970\u5B58\u50A8\u5143\u7D20\u7684<code>elementData</code>\u7684\u6570\u7EC4\uFF0C<code>transient</code>\u5173\u952E\u5B57\u7684\u4F5C\u7528\u662F\u8BA9\u88AB\u4FEE\u9970\u7684\u6210\u5458\u5C5E\u6027\u4E0D\u88AB\u5E8F\u5217\u5316\u3002</p><p><strong>\u4E3A\u4EC0\u4E48\u6700ArrayList\u4E0D\u76F4\u63A5\u5E8F\u5217\u5316\u5143\u7D20\u6570\u7EC4\u5462\uFF1F</strong></p><p>\u51FA\u4E8E\u6548\u7387\u7684\u8003\u8651\uFF0C\u6570\u7EC4\u53EF\u80FD\u957F\u5EA6100\uFF0C\u4F46\u5B9E\u9645\u53EA\u7528\u4E8650\uFF0C\u5269\u4E0B\u768450\u4E0D\u7528\u5176\u5B9E\u4E0D\u7528\u5E8F\u5217\u5316\uFF0C\u8FD9\u6837\u53EF\u4EE5\u63D0\u9AD8\u5E8F\u5217\u5316\u548C\u53CD\u5E8F\u5217\u5316\u7684\u6548\u7387\uFF0C\u8FD8\u53EF\u4EE5\u8282\u7701\u5185\u5B58\u7A7A\u95F4\u3002</p><p><strong>\u90A3ArrayList\u600E\u4E48\u5E8F\u5217\u5316\u5462\uFF1F</strong></p><p>ArrayList\u901A\u8FC7\u4E24\u4E2A\u65B9\u6CD5<strong>readObject\u3001writeObject</strong>\u81EA\u5B9A\u4E49\u5E8F\u5217\u5316\u548C\u53CD\u5E8F\u5217\u5316\u7B56\u7565\uFF0C\u5B9E\u9645\u76F4\u63A5\u4F7F\u7528\u4E24\u4E2A\u6D41<code>ObjectOutputStream</code>\u548C<code>ObjectInputStream</code>\u6765\u8FDB\u884C\u5E8F\u5217\u5316\u548C\u53CD\u5E8F\u5217\u5316\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/collection-6.png" alt="ArrayList\u81EA\u5B9A\u4E49\u5E8F\u5217\u5316"></p><h3 id="_5-\u5FEB\u901F\u5931\u8D25-fail-fast-\u548C\u5B89\u5168\u5931\u8D25-fail-safe-\u4E86\u89E3\u5417" tabindex="-1"><a class="header-anchor" href="#_5-\u5FEB\u901F\u5931\u8D25-fail-fast-\u548C\u5B89\u5168\u5931\u8D25-fail-safe-\u4E86\u89E3\u5417" aria-hidden="true">#</a> 5.\u5FEB\u901F\u5931\u8D25(fail-fast)\u548C\u5B89\u5168\u5931\u8D25(fail-safe)\u4E86\u89E3\u5417\uFF1F</h3><p><strong>\u5FEB\u901F\u5931\u8D25\uFF08fail\u2014fast\uFF09</strong>\uFF1A\u5FEB\u901F\u5931\u8D25\u662FJava\u96C6\u5408\u7684\u4E00\u79CD\u9519\u8BEF\u68C0\u6D4B\u673A\u5236</p><ul><li>\u5728\u7528\u8FED\u4EE3\u5668\u904D\u5386\u4E00\u4E2A\u96C6\u5408\u5BF9\u8C61\u65F6\uFF0C\u5982\u679C\u7EBF\u7A0BA\u904D\u5386\u8FC7\u7A0B\u4E2D\uFF0C\u7EBF\u7A0BB\u5BF9\u96C6\u5408\u5BF9\u8C61\u7684\u5185\u5BB9\u8FDB\u884C\u4E86\u4FEE\u6539\uFF08\u589E\u52A0\u3001\u5220\u9664\u3001\u4FEE\u6539\uFF09\uFF0C\u5219\u4F1A\u629B\u51FAConcurrent Modification Exception\u3002</li><li>\u539F\u7406\uFF1A\u8FED\u4EE3\u5668\u5728\u904D\u5386\u65F6\u76F4\u63A5\u8BBF\u95EE\u96C6\u5408\u4E2D\u7684\u5185\u5BB9\uFF0C\u5E76\u4E14\u5728\u904D\u5386\u8FC7\u7A0B\u4E2D\u4F7F\u7528\u4E00\u4E2A <code> modCount</code> \u53D8\u91CF\u3002\u96C6\u5408\u5728\u88AB\u904D\u5386\u671F\u95F4\u5982\u679C\u5185\u5BB9\u53D1\u751F\u53D8\u5316\uFF0C\u5C31\u4F1A\u6539\u53D8<code>modCount</code>\u7684\u503C\u3002\u6BCF\u5F53\u8FED\u4EE3\u5668\u4F7F\u7528hashNext()/next()\u904D\u5386\u4E0B\u4E00\u4E2A\u5143\u7D20\u4E4B\u524D\uFF0C\u90FD\u4F1A\u68C0\u6D4BmodCount\u53D8\u91CF\u662F\u5426\u4E3AexpectedmodCount\u503C\uFF0C\u662F\u7684\u8BDD\u5C31\u8FD4\u56DE\u904D\u5386\uFF1B\u5426\u5219\u629B\u51FA\u5F02\u5E38\uFF0C\u7EC8\u6B62\u904D\u5386\u3002</li><li>\u6CE8\u610F\uFF1A\u8FD9\u91CC\u5F02\u5E38\u7684\u629B\u51FA\u6761\u4EF6\u662F\u68C0\u6D4B\u5230 modCount\uFF01=expectedmodCount \u8FD9\u4E2A\u6761\u4EF6\u3002\u5982\u679C\u96C6\u5408\u53D1\u751F\u53D8\u5316\u65F6\u4FEE\u6539modCount\u503C\u521A\u597D\u53C8\u8BBE\u7F6E\u4E3A\u4E86expectedmodCount\u503C\uFF0C\u5219\u5F02\u5E38\u4E0D\u4F1A\u629B\u51FA\u3002\u56E0\u6B64\uFF0C\u4E0D\u80FD\u4F9D\u8D56\u4E8E\u8FD9\u4E2A\u5F02\u5E38\u662F\u5426\u629B\u51FA\u800C\u8FDB\u884C\u5E76\u53D1\u64CD\u4F5C\u7684\u7F16\u7A0B\uFF0C\u8FD9\u4E2A\u5F02\u5E38\u53EA\u5EFA\u8BAE\u7528\u4E8E\u68C0\u6D4B\u5E76\u53D1\u4FEE\u6539\u7684bug\u3002</li><li>\u573A\u666F\uFF1Ajava.util\u5305\u4E0B\u7684\u96C6\u5408\u7C7B\u90FD\u662F\u5FEB\u901F\u5931\u8D25\u7684\uFF0C\u4E0D\u80FD\u5728\u591A\u7EBF\u7A0B\u4E0B\u53D1\u751F\u5E76\u53D1\u4FEE\u6539\uFF08\u8FED\u4EE3\u8FC7\u7A0B\u4E2D\u88AB\u4FEE\u6539\uFF09\uFF0C\u6BD4\u5982ArrayList \u7C7B\u3002</li></ul><p><strong>\u5B89\u5168\u5931\u8D25\uFF08fail\u2014safe\uFF09</strong></p><ul><li>\u91C7\u7528\u5B89\u5168\u5931\u8D25\u673A\u5236\u7684\u96C6\u5408\u5BB9\u5668\uFF0C\u5728\u904D\u5386\u65F6\u4E0D\u662F\u76F4\u63A5\u5728\u96C6\u5408\u5185\u5BB9\u4E0A\u8BBF\u95EE\u7684\uFF0C\u800C\u662F\u5148\u590D\u5236\u539F\u6709\u96C6\u5408\u5185\u5BB9\uFF0C\u5728\u62F7\u8D1D\u7684\u96C6\u5408\u4E0A\u8FDB\u884C\u904D\u5386\u3002</li><li>\u539F\u7406\uFF1A\u7531\u4E8E\u8FED\u4EE3\u65F6\u662F\u5BF9\u539F\u96C6\u5408\u7684\u62F7\u8D1D\u8FDB\u884C\u904D\u5386\uFF0C\u6240\u4EE5\u5728\u904D\u5386\u8FC7\u7A0B\u4E2D\u5BF9\u539F\u96C6\u5408\u6240\u4F5C\u7684\u4FEE\u6539\u5E76\u4E0D\u80FD\u88AB\u8FED\u4EE3\u5668\u68C0\u6D4B\u5230\uFF0C\u6240\u4EE5\u4E0D\u4F1A\u89E6\u53D1Concurrent Modification Exception\u3002</li><li>\u7F3A\u70B9\uFF1A\u57FA\u4E8E\u62F7\u8D1D\u5185\u5BB9\u7684\u4F18\u70B9\u662F\u907F\u514D\u4E86Concurrent Modification Exception\uFF0C\u4F46\u540C\u6837\u5730\uFF0C\u8FED\u4EE3\u5668\u5E76\u4E0D\u80FD\u8BBF\u95EE\u5230\u4FEE\u6539\u540E\u7684\u5185\u5BB9\uFF0C\u5373\uFF1A\u8FED\u4EE3\u5668\u904D\u5386\u7684\u662F\u5F00\u59CB\u904D\u5386\u90A3\u4E00\u523B\u62FF\u5230\u7684\u96C6\u5408\u62F7\u8D1D\uFF0C\u5728\u904D\u5386\u671F\u95F4\u539F\u96C6\u5408\u53D1\u751F\u7684\u4FEE\u6539\u8FED\u4EE3\u5668\u662F\u4E0D\u77E5\u9053\u7684\u3002</li><li>\u573A\u666F\uFF1Ajava.util.concurrent\u5305\u4E0B\u7684\u5BB9\u5668\u90FD\u662F\u5B89\u5168\u5931\u8D25\uFF0C\u53EF\u4EE5\u5728\u591A\u7EBF\u7A0B\u4E0B\u5E76\u53D1\u4F7F\u7528\uFF0C\u5E76\u53D1\u4FEE\u6539\uFF0C\u6BD4\u5982CopyOnWriteArrayList\u7C7B\u3002</li></ul><h3 id="_6-\u6709\u54EA\u51E0\u79CD\u5B9E\u73B0arraylist\u7EBF\u7A0B\u5B89\u5168\u7684\u65B9\u6CD5" tabindex="-1"><a class="header-anchor" href="#_6-\u6709\u54EA\u51E0\u79CD\u5B9E\u73B0arraylist\u7EBF\u7A0B\u5B89\u5168\u7684\u65B9\u6CD5" aria-hidden="true">#</a> 6.\u6709\u54EA\u51E0\u79CD\u5B9E\u73B0ArrayList\u7EBF\u7A0B\u5B89\u5168\u7684\u65B9\u6CD5\uFF1F</h3><p>fail-fast\u662F\u4E00\u79CD\u53EF\u80FD\u89E6\u53D1\u7684\u673A\u5236\uFF0C\u5B9E\u9645\u4E0A\uFF0CArrayList\u7684\u7EBF\u7A0B\u5B89\u5168\u4ECD\u7136\u6CA1\u6709\u4FDD\u8BC1\uFF0C\u4E00\u822C\uFF0C\u4FDD\u8BC1ArrayList\u7684\u7EBF\u7A0B\u5B89\u5168\u53EF\u4EE5\u901A\u8FC7\u8FD9\u4E9B\u65B9\u6848\uFF1A</p><ul><li>\u4F7F\u7528 Vector \u4EE3\u66FF ArrayList\u3002\uFF08\u4E0D\u63A8\u8350\uFF0CVector\u662F\u4E00\u4E2A\u5386\u53F2\u9057\u7559\u7C7B\uFF09</li><li>\u4F7F\u7528 Collections.synchronizedList \u5305\u88C5 ArrayList\uFF0C\u7136\u540E\u64CD\u4F5C\u5305\u88C5\u540E\u7684 list\u3002</li><li>\u4F7F\u7528 CopyOnWriteArrayList \u4EE3\u66FF ArrayList\u3002</li><li>\u5728\u4F7F\u7528 ArrayList \u65F6\uFF0C\u5E94\u7528\u7A0B\u5E8F\u901A\u8FC7\u540C\u6B65\u673A\u5236\u53BB\u63A7\u5236 ArrayList \u7684\u8BFB\u5199\u3002</li></ul><h3 id="_7-copyonwritearraylist\u4E86\u89E3\u591A\u5C11" tabindex="-1"><a class="header-anchor" href="#_7-copyonwritearraylist\u4E86\u89E3\u591A\u5C11" aria-hidden="true">#</a> 7.CopyOnWriteArrayList\u4E86\u89E3\u591A\u5C11\uFF1F</h3><p>CopyOnWriteArrayList\u5C31\u662F\u7EBF\u7A0B\u5B89\u5168\u7248\u672C\u7684ArrayList\u3002</p><p>\u5B83\u7684\u540D\u5B57\u53EB<code>CopyOnWrite</code>\u2014\u2014\u5199\u65F6\u590D\u5236\uFF0C\u5DF2\u7ECF\u660E\u793A\u4E86\u5B83\u7684\u539F\u7406\u3002</p><p>CopyOnWriteArrayList\u91C7\u7528\u4E86\u4E00\u79CD\u8BFB\u5199\u5206\u79BB\u7684\u5E76\u53D1\u7B56\u7565\u3002CopyOnWriteArrayList\u5BB9\u5668\u5141\u8BB8\u5E76\u53D1\u8BFB\uFF0C\u8BFB\u64CD\u4F5C\u662F\u65E0\u9501\u7684\uFF0C\u6027\u80FD\u8F83\u9AD8\u3002\u81F3\u4E8E\u5199\u64CD\u4F5C\uFF0C\u6BD4\u5982\u5411\u5BB9\u5668\u4E2D\u6DFB\u52A0\u4E00\u4E2A\u5143\u7D20\uFF0C\u5219\u9996\u5148\u5C06\u5F53\u524D\u5BB9\u5668\u590D\u5236\u4E00\u4EFD\uFF0C\u7136\u540E\u5728\u65B0\u526F\u672C\u4E0A\u6267\u884C\u5199\u64CD\u4F5C\uFF0C\u7ED3\u675F\u4E4B\u540E\u518D\u5C06\u539F\u5BB9\u5668\u7684\u5F15\u7528\u6307\u5411\u65B0\u5BB9\u5668\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/collection-7.png" alt="CopyOnWriteArrayList\u539F\u7406"></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><h2 id="map" tabindex="-1"><a class="header-anchor" href="#map" aria-hidden="true">#</a> Map</h2><p>Map\u4E2D\uFF0C\u6BEB\u65E0\u7591\u95EE\uFF0C\u6700\u91CD\u8981\u7684\u5C31\u662FHashMap\uFF0C\u9762\u8BD5\u57FA\u672C\u88AB\u76D8\u51FA\u5305\u6D46\u4E86\uFF0C\u5404\u79CD\u95EE\u6CD5\uFF0C\u4E00\u5B9A\u8981\u597D\u597D\u51C6\u5907\u3002</p><h3 id="_8-\u80FD\u8BF4\u4E00\u4E0Bhashmap\u7684\u6570\u636E\u7ED3\u6784\u5417" tabindex="-1"><a class="header-anchor" href="#_8-\u80FD\u8BF4\u4E00\u4E0Bhashmap\u7684\u6570\u636E\u7ED3\u6784\u5417" aria-hidden="true">#</a> 8.\u80FD\u8BF4\u4E00\u4E0BHashMap\u7684\u6570\u636E\u7ED3\u6784\u5417\uFF1F</h3><p>JDK1.7\u7684\u6570\u636E\u7ED3\u6784\u662F<code>\u6570\u7EC4</code>+<code>\u94FE\u8868</code>\uFF0CJDK1.7\u8FD8\u6709\u4EBA\u5728\u7528\uFF1F\u4E0D\u4F1A\u5427\u2026\u2026</p><p>\u8BF4\u4E00\u4E0BJDK1.8\u7684\u6570\u636E\u7ED3\u6784\u5427\uFF1A</p><p>JDK1.8\u7684\u6570\u636E\u7ED3\u6784\u662F<code>\u6570\u7EC4</code>+<code>\u94FE\u8868</code>+<code>\u7EA2\u9ED1\u6811</code>\u3002</p><p>\u6570\u636E\u7ED3\u6784\u793A\u610F\u56FE\u5982\u4E0B\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/collection-8.png" alt="jdk1.8 hashmap\u6570\u636E\u7ED3\u6784\u793A\u610F\u56FE"></p><p>\u5176\u4E2D\uFF0C\u6876\u6570\u7EC4\u662F\u7528\u6765\u5B58\u50A8\u6570\u636E\u5143\u7D20\uFF0C\u94FE\u8868\u662F\u7528\u6765\u89E3\u51B3\u51B2\u7A81\uFF0C\u7EA2\u9ED1\u6811\u662F\u4E3A\u4E86\u63D0\u9AD8\u67E5\u8BE2\u7684\u6548\u7387\u3002</p><ul><li>\u6570\u636E\u5143\u7D20\u901A\u8FC7\u6620\u5C04\u5173\u7CFB\uFF0C\u4E5F\u5C31\u662F\u6563\u5217\u51FD\u6570\uFF0C\u6620\u5C04\u5230\u6876\u6570\u7EC4\u5BF9\u5E94\u7D22\u5F15\u7684\u4F4D\u7F6E</li><li>\u5982\u679C\u53D1\u751F\u51B2\u7A81\uFF0C\u4ECE\u51B2\u7A81\u7684\u4F4D\u7F6E\u62C9\u4E00\u4E2A\u94FE\u8868\uFF0C\u63D2\u5165\u51B2\u7A81\u7684\u5143\u7D20</li><li>\u5982\u679C\u94FE\u8868\u957F\u5EA6&gt;8&amp;\u6570\u7EC4\u5927\u5C0F&gt;=64\uFF0C\u94FE\u8868\u8F6C\u4E3A\u7EA2\u9ED1\u6811</li><li>\u5982\u679C\u7EA2\u9ED1\u6811\u8282\u70B9\u4E2A\u6570&lt;6 \uFF0C\u8F6C\u4E3A\u94FE\u8868</li></ul><h3 id="_9-\u4F60\u5BF9\u7EA2\u9ED1\u6811\u4E86\u89E3\u591A\u5C11-\u4E3A\u4EC0\u4E48\u4E0D\u7528\u4E8C\u53C9\u6811-\u5E73\u8861\u6811\u5462" tabindex="-1"><a class="header-anchor" href="#_9-\u4F60\u5BF9\u7EA2\u9ED1\u6811\u4E86\u89E3\u591A\u5C11-\u4E3A\u4EC0\u4E48\u4E0D\u7528\u4E8C\u53C9\u6811-\u5E73\u8861\u6811\u5462" aria-hidden="true">#</a> 9.\u4F60\u5BF9\u7EA2\u9ED1\u6811\u4E86\u89E3\u591A\u5C11\uFF1F\u4E3A\u4EC0\u4E48\u4E0D\u7528\u4E8C\u53C9\u6811/\u5E73\u8861\u6811\u5462\uFF1F</h3><p>\u7EA2\u9ED1\u6811\u672C\u8D28\u4E0A\u662F\u4E00\u79CD\u4E8C\u53C9\u67E5\u627E\u6811\uFF0C\u4E3A\u4E86\u4FDD\u6301\u5E73\u8861\uFF0C\u5B83\u53C8\u5728\u4E8C\u53C9\u67E5\u627E\u6811\u7684\u57FA\u7840\u4E0A\u589E\u52A0\u4E86\u4E00\u4E9B\u89C4\u5219\uFF1A</p><ol><li>\u6BCF\u4E2A\u8282\u70B9\u8981\u4E48\u662F\u7EA2\u8272\uFF0C\u8981\u4E48\u662F\u9ED1\u8272\uFF1B</li><li>\u6839\u8282\u70B9\u6C38\u8FDC\u662F\u9ED1\u8272\u7684\uFF1B</li><li>\u6240\u6709\u7684\u53F6\u5B50\u8282\u70B9\u90FD\u662F\u662F\u9ED1\u8272\u7684\uFF08\u6CE8\u610F\u8FD9\u91CC\u8BF4\u53F6\u5B50\u8282\u70B9\u5176\u5B9E\u662F\u56FE\u4E2D\u7684 NULL \u8282\u70B9\uFF09\uFF1B</li><li>\u6BCF\u4E2A\u7EA2\u8272\u8282\u70B9\u7684\u4E24\u4E2A\u5B50\u8282\u70B9\u4E00\u5B9A\u90FD\u662F\u9ED1\u8272\uFF1B</li><li>\u4ECE\u4EFB\u4E00\u8282\u70B9\u5230\u5176\u5B50\u6811\u4E2D\u6BCF\u4E2A\u53F6\u5B50\u8282\u70B9\u7684\u8DEF\u5F84\u90FD\u5305\u542B\u76F8\u540C\u6570\u91CF\u7684\u9ED1\u8272\u8282\u70B9\uFF1B</li></ol><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/collection-9.png" alt="\u7EA2\u9ED1\u6811"></p><blockquote><p>\u4E4B\u6240\u4EE5\u4E0D\u7528\u4E8C\u53C9\u6811\uFF1A</p></blockquote><p>\u7EA2\u9ED1\u6811\u662F\u4E00\u79CD\u5E73\u8861\u7684\u4E8C\u53C9\u6811\uFF0C\u63D2\u5165\u3001\u5220\u9664\u3001\u67E5\u627E\u7684\u6700\u574F\u65F6\u95F4\u590D\u6742\u5EA6\u90FD\u4E3A O(logn)\uFF0C\u907F\u514D\u4E86\u4E8C\u53C9\u6811\u6700\u574F\u60C5\u51B5\u4E0B\u7684O(n)\u65F6\u95F4\u590D\u6742\u5EA6\u3002</p><blockquote><p>\u4E4B\u6240\u4EE5\u4E0D\u7528\u5E73\u8861\u4E8C\u53C9\u6811\uFF1A</p></blockquote><p>\u5E73\u8861\u4E8C\u53C9\u6811\u662F\u6BD4\u7EA2\u9ED1\u6811\u66F4\u4E25\u683C\u7684\u5E73\u8861\u6811\uFF0C\u4E3A\u4E86\u4FDD\u6301\u4FDD\u6301\u5E73\u8861\uFF0C\u9700\u8981\u65CB\u8F6C\u7684\u6B21\u6570\u66F4\u591A\uFF0C\u4E5F\u5C31\u662F\u8BF4\u5E73\u8861\u4E8C\u53C9\u6811\u4FDD\u6301\u5E73\u8861\u7684\u6548\u7387\u66F4\u4F4E\uFF0C\u6240\u4EE5\u5E73\u8861\u4E8C\u53C9\u6811\u63D2\u5165\u548C\u5220\u9664\u7684\u6548\u7387\u6BD4\u7EA2\u9ED1\u6811\u8981\u4F4E\u3002</p><h3 id="_10-\u7EA2\u9ED1\u6811\u600E\u4E48\u4FDD\u6301\u5E73\u8861\u7684\u77E5\u9053\u5417" tabindex="-1"><a class="header-anchor" href="#_10-\u7EA2\u9ED1\u6811\u600E\u4E48\u4FDD\u6301\u5E73\u8861\u7684\u77E5\u9053\u5417" aria-hidden="true">#</a> 10.\u7EA2\u9ED1\u6811\u600E\u4E48\u4FDD\u6301\u5E73\u8861\u7684\u77E5\u9053\u5417\uFF1F</h3><p>\u7EA2\u9ED1\u6811\u6709\u4E24\u79CD\u65B9\u5F0F\u4FDD\u6301\u5E73\u8861\uFF1A<code>\u65CB\u8F6C</code>\u548C<code>\u67D3\u8272</code>\u3002</p><ul><li>\u65CB\u8F6C\uFF1A\u65CB\u8F6C\u5206\u4E3A\u4E24\u79CD\uFF0C\u5DE6\u65CB\u548C\u53F3\u65CB</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/collection-10.png" alt="\u5DE6\u65CB"></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/collection-11.png" alt="\u53F3\u65CB"></p><ul><li>\u67D3\u2F8A\uFF1A</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/collection-12.png" alt="\u67D3\u8272"></p><h3 id="_11-hashmap\u7684put\u6D41\u7A0B\u77E5\u9053\u5417" tabindex="-1"><a class="header-anchor" href="#_11-hashmap\u7684put\u6D41\u7A0B\u77E5\u9053\u5417" aria-hidden="true">#</a> 11.HashMap\u7684put\u6D41\u7A0B\u77E5\u9053\u5417\uFF1F</h3><p>\u5148\u4E0A\u4E2A\u6D41\u7A0B\u56FE\u5427:</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/collection-13.jpg" alt="HashMap\u63D2\u5165\u6570\u636E\u6D41\u7A0B\u56FE"></p><ol><li><p>\u9996\u5148\u8FDB\u884C\u54C8\u5E0C\u503C\u7684\u6270\u52A8\uFF0C\u83B7\u53D6\u4E00\u4E2A\u65B0\u7684\u54C8\u5E0C\u503C\u3002<code>(key == null) ? 0 : (h = key.hashCode()) ^ (h &gt;&gt;&gt; 16);</code></p></li><li><p>\u5224\u65ADtab\u662F\u5426\u4F4D\u7A7A\u6216\u8005\u957F\u5EA6\u4E3A0\uFF0C\u5982\u679C\u662F\u5219\u8FDB\u884C\u6269\u5BB9\u64CD\u4F5C\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token punctuation">(</span>tab <span class="token operator">=</span> table<span class="token punctuation">)</span> <span class="token operator">==</span> <span class="token keyword">null</span> <span class="token operator">||</span> <span class="token punctuation">(</span>n <span class="token operator">=</span> tab<span class="token punctuation">.</span>length<span class="token punctuation">)</span> <span class="token operator">==</span> <span class="token number">0</span><span class="token punctuation">)</span>
     n <span class="token operator">=</span> <span class="token punctuation">(</span>tab <span class="token operator">=</span> <span class="token function">resize</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">.</span>length<span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div></li><li><p>\u6839\u636E\u54C8\u5E0C\u503C\u8BA1\u7B97\u4E0B\u6807\uFF0C\u5982\u679C\u5BF9\u5E94\u5C0F\u6807\u6B63\u597D\u6CA1\u6709\u5B58\u653E\u6570\u636E\uFF0C\u5219\u76F4\u63A5\u63D2\u5165\u5373\u53EF\u5426\u5219\u9700\u8981\u8986\u76D6\u3002<code>tab[i = (n - 1) &amp; hash])</code></p></li><li><p>\u5224\u65ADtab[i]\u662F\u5426\u4E3A\u6811\u8282\u70B9\uFF0C\u5426\u5219\u5411\u94FE\u8868\u4E2D\u63D2\u5165\u6570\u636E\uFF0C\u662F\u5219\u5411\u6811\u4E2D\u63D2\u5165\u8282\u70B9\u3002</p></li><li><p>\u5982\u679C\u94FE\u8868\u4E2D\u63D2\u5165\u8282\u70B9\u7684\u65F6\u5019\uFF0C\u94FE\u8868\u957F\u5EA6\u5927\u4E8E\u7B49\u4E8E8\uFF0C\u5219\u9700\u8981\u628A\u94FE\u8868\u8F6C\u6362\u4E3A\u7EA2\u9ED1\u6811\u3002<code>treeifyBin(tab, hash);</code></p></li><li><p>\u6700\u540E\u6240\u6709\u5143\u7D20\u5904\u7406\u5B8C\u6210\u540E\uFF0C\u5224\u65AD\u662F\u5426\u8D85\u8FC7\u9608\u503C\uFF1B<code>threshold</code>\uFF0C\u8D85\u8FC7\u5219\u6269\u5BB9\u3002</p></li></ol><h3 id="_12-hashmap\u600E\u4E48\u67E5\u627E\u5143\u7D20\u7684\u5462" tabindex="-1"><a class="header-anchor" href="#_12-hashmap\u600E\u4E48\u67E5\u627E\u5143\u7D20\u7684\u5462" aria-hidden="true">#</a> 12.HashMap\u600E\u4E48\u67E5\u627E\u5143\u7D20\u7684\u5462\uFF1F</h3><p>\u5148\u770B\u6D41\u7A0B\u56FE\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/collection-14.png" alt="HashMap\u67E5\u627E\u6D41\u7A0B\u56FE"></p><p>HashMap\u7684\u67E5\u627E\u5C31\u7B80\u5355\u5F88\u591A\uFF1A</p><ol><li>\u4F7F\u7528\u6270\u52A8\u51FD\u6570\uFF0C\u83B7\u53D6\u65B0\u7684\u54C8\u5E0C\u503C</li><li>\u8BA1\u7B97\u6570\u7EC4\u4E0B\u6807\uFF0C\u83B7\u53D6\u8282\u70B9</li><li>\u5F53\u524D\u8282\u70B9\u548Ckey\u5339\u914D\uFF0C\u76F4\u63A5\u8FD4\u56DE</li><li>\u5426\u5219\uFF0C\u5F53\u524D\u8282\u70B9\u662F\u5426\u4E3A\u6811\u8282\u70B9\uFF0C\u67E5\u627E\u7EA2\u9ED1\u6811</li><li>\u5426\u5219\uFF0C\u904D\u5386\u94FE\u8868\u67E5\u627E</li></ol><h3 id="_13-hashmap\u7684\u54C8\u5E0C-\u6270\u52A8\u51FD\u6570\u662F\u600E\u4E48\u8BBE\u8BA1\u7684" tabindex="-1"><a class="header-anchor" href="#_13-hashmap\u7684\u54C8\u5E0C-\u6270\u52A8\u51FD\u6570\u662F\u600E\u4E48\u8BBE\u8BA1\u7684" aria-hidden="true">#</a> 13.HashMap\u7684\u54C8\u5E0C/\u6270\u52A8\u51FD\u6570\u662F\u600E\u4E48\u8BBE\u8BA1\u7684?</h3><p>HashMap\u7684\u54C8\u5E0C\u51FD\u6570\u662F\u5148\u62FF\u5230 key \u7684hashcode\uFF0C\u662F\u4E00\u4E2A32\u4F4D\u7684int\u7C7B\u578B\u7684\u6570\u503C\uFF0C\u7136\u540E\u8BA9hashcode\u7684\u9AD816\u4F4D\u548C\u4F4E16\u4F4D\u8FDB\u884C\u5F02\u6216\u64CD\u4F5C\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code>    <span class="token keyword">static</span> <span class="token keyword">final</span> <span class="token keyword">int</span> <span class="token function">hash</span><span class="token punctuation">(</span><span class="token class-name">Object</span> key<span class="token punctuation">)</span> <span class="token punctuation">{</span>
         <span class="token keyword">int</span> h<span class="token punctuation">;</span>
diff --git a/dist/assets/collections.html.b7f2022a.js b/dist/assets/collections.html.37777ec8.js
similarity index 99%
rename from dist/assets/collections.html.b7f2022a.js
rename to dist/assets/collections.html.37777ec8.js
index 4a8ddefb..b4adf04d 100644
--- a/dist/assets/collections.html.b7f2022a.js
+++ b/dist/assets/collections.html.37777ec8.js
@@ -1,4 +1,4 @@
-import{_ as e}from"./plugin-vue_export-helper.21dcd24c.js";import{r as o,o as c,c as l,a as n,b as t,d as s,e as p}from"./app.a0271b9c.js";const i={},u=n("h1",{id:"java\u96C6\u5408\u6846\u67B6-collections\u5DE5\u5177\u7C7B",tabindex:"-1"},[n("a",{class:"header-anchor",href:"#java\u96C6\u5408\u6846\u67B6-collections\u5DE5\u5177\u7C7B","aria-hidden":"true"},"#"),s(" Java\u96C6\u5408\u6846\u67B6\uFF1ACollections\u5DE5\u5177\u7C7B")],-1),k=n("p",null,"Collections \u662F JDK \u63D0\u4F9B\u7684\u4E00\u4E2A\u5DE5\u5177\u7C7B\uFF0C\u4F4D\u4E8E java.util \u5305\u4E0B\uFF0C\u63D0\u4F9B\u4E86\u4E00\u7CFB\u5217\u7684\u9759\u6001\u65B9\u6CD5\uFF0C\u65B9\u4FBF\u6211\u4EEC\u5BF9\u96C6\u5408\u8FDB\u884C\u5404\u79CD\u9A9A\u64CD\u4F5C\uFF0C\u7B97\u662F\u96C6\u5408\u6846\u67B6\u7684\u4E00\u4E2A\u5927\u7BA1\u5BB6\u3002",-1),d=s("\u8FD8\u8BB0\u5F97\u6211\u4EEC\u524D\u9762\u8BB2\u8FC7\u7684 "),r={href:"https://mp.weixin.qq.com/s/9dYmKXEErZbyPJ_GxwWYug",target:"_blank",rel:"noopener noreferrer"},m=s("Arrays \u5DE5\u5177\u7C7B"),v=s("\u5417\uFF1F\u53EF\u4EE5\u56DE\u53BB\u6E29\u4E60\u4E0B\u3002"),b=p(`<p>Collections \u7684\u7528\u6CD5\u5F88\u7B80\u5355\uFF0C\u5728 Intellij IDEA \u4E2D\u6572\u5B8C <code>Collections.</code> \u4E4B\u540E\u5C31\u53EF\u4EE5\u770B\u5230\u5B83\u63D0\u4F9B\u7684\u65B9\u6CD5\u4E86\uFF0C\u5927\u81F4\u770B\u4E00\u4E0B\u65B9\u6CD5\u540D\u548C\u53C2\u6570\u5C31\u80FD\u77E5\u9053\u8FD9\u4E2A\u65B9\u6CD5\u662F\u5E72\u561B\u7684\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/common-tool/collections-01.png" alt=""></p><p>\u4E3A\u4E86\u8282\u7701\u5927\u5BB6\u7684\u5B66\u4E60\u65F6\u95F4\uFF0C\u6211\u5C06\u8FD9\u4E9B\u65B9\u6CD5\u505A\u4E86\u4E00\u4E9B\u5206\u7C7B\uFF0C\u5E76\u5217\u4E3E\u4E86\u4E00\u4E9B\u7B80\u5355\u7684\u4F8B\u5B50\u3002</p><h3 id="_01\u3001\u6392\u5E8F\u64CD\u4F5C" tabindex="-1"><a class="header-anchor" href="#_01\u3001\u6392\u5E8F\u64CD\u4F5C" aria-hidden="true">#</a> 01\u3001\u6392\u5E8F\u64CD\u4F5C</h3><ul><li><code>reverse(List list)</code>\uFF1A\u53CD\u8F6C\u987A\u5E8F</li><li><code>shuffle(List list)</code>\uFF1A\u6D17\u724C\uFF0C\u5C06\u987A\u5E8F\u6253\u4E71</li><li><code>sort(List list)</code>\uFF1A\u81EA\u7136\u5347\u5E8F</li><li><code>sort(List list, Comparator c)</code>\uFF1A\u6309\u7167\u81EA\u5B9A\u4E49\u7684\u6BD4\u8F83\u5668\u6392\u5E8F</li><li><code>swap(List list, int i, int j)</code>\uFF1A\u5C06 i \u548C j \u4F4D\u7F6E\u7684\u5143\u7D20\u4EA4\u6362\u4F4D\u7F6E</li></ul><p>\u6765\u770B\u4F8B\u5B50\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">List</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">String</span><span class="token punctuation">&gt;</span></span> list <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">ArrayList</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token punctuation">&gt;</span></span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
+import{_ as e}from"./plugin-vue_export-helper.21dcd24c.js";import{r as o,o as c,c as l,a as n,b as t,d as s,e as p}from"./app.615e41d8.js";const i={},u=n("h1",{id:"java\u96C6\u5408\u6846\u67B6-collections\u5DE5\u5177\u7C7B",tabindex:"-1"},[n("a",{class:"header-anchor",href:"#java\u96C6\u5408\u6846\u67B6-collections\u5DE5\u5177\u7C7B","aria-hidden":"true"},"#"),s(" Java\u96C6\u5408\u6846\u67B6\uFF1ACollections\u5DE5\u5177\u7C7B")],-1),k=n("p",null,"Collections \u662F JDK \u63D0\u4F9B\u7684\u4E00\u4E2A\u5DE5\u5177\u7C7B\uFF0C\u4F4D\u4E8E java.util \u5305\u4E0B\uFF0C\u63D0\u4F9B\u4E86\u4E00\u7CFB\u5217\u7684\u9759\u6001\u65B9\u6CD5\uFF0C\u65B9\u4FBF\u6211\u4EEC\u5BF9\u96C6\u5408\u8FDB\u884C\u5404\u79CD\u9A9A\u64CD\u4F5C\uFF0C\u7B97\u662F\u96C6\u5408\u6846\u67B6\u7684\u4E00\u4E2A\u5927\u7BA1\u5BB6\u3002",-1),d=s("\u8FD8\u8BB0\u5F97\u6211\u4EEC\u524D\u9762\u8BB2\u8FC7\u7684 "),r={href:"https://mp.weixin.qq.com/s/9dYmKXEErZbyPJ_GxwWYug",target:"_blank",rel:"noopener noreferrer"},m=s("Arrays \u5DE5\u5177\u7C7B"),v=s("\u5417\uFF1F\u53EF\u4EE5\u56DE\u53BB\u6E29\u4E60\u4E0B\u3002"),b=p(`<p>Collections \u7684\u7528\u6CD5\u5F88\u7B80\u5355\uFF0C\u5728 Intellij IDEA \u4E2D\u6572\u5B8C <code>Collections.</code> \u4E4B\u540E\u5C31\u53EF\u4EE5\u770B\u5230\u5B83\u63D0\u4F9B\u7684\u65B9\u6CD5\u4E86\uFF0C\u5927\u81F4\u770B\u4E00\u4E0B\u65B9\u6CD5\u540D\u548C\u53C2\u6570\u5C31\u80FD\u77E5\u9053\u8FD9\u4E2A\u65B9\u6CD5\u662F\u5E72\u561B\u7684\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/common-tool/collections-01.png" alt=""></p><p>\u4E3A\u4E86\u8282\u7701\u5927\u5BB6\u7684\u5B66\u4E60\u65F6\u95F4\uFF0C\u6211\u5C06\u8FD9\u4E9B\u65B9\u6CD5\u505A\u4E86\u4E00\u4E9B\u5206\u7C7B\uFF0C\u5E76\u5217\u4E3E\u4E86\u4E00\u4E9B\u7B80\u5355\u7684\u4F8B\u5B50\u3002</p><h3 id="_01\u3001\u6392\u5E8F\u64CD\u4F5C" tabindex="-1"><a class="header-anchor" href="#_01\u3001\u6392\u5E8F\u64CD\u4F5C" aria-hidden="true">#</a> 01\u3001\u6392\u5E8F\u64CD\u4F5C</h3><ul><li><code>reverse(List list)</code>\uFF1A\u53CD\u8F6C\u987A\u5E8F</li><li><code>shuffle(List list)</code>\uFF1A\u6D17\u724C\uFF0C\u5C06\u987A\u5E8F\u6253\u4E71</li><li><code>sort(List list)</code>\uFF1A\u81EA\u7136\u5347\u5E8F</li><li><code>sort(List list, Comparator c)</code>\uFF1A\u6309\u7167\u81EA\u5B9A\u4E49\u7684\u6BD4\u8F83\u5668\u6392\u5E8F</li><li><code>swap(List list, int i, int j)</code>\uFF1A\u5C06 i \u548C j \u4F4D\u7F6E\u7684\u5143\u7D20\u4EA4\u6362\u4F4D\u7F6E</li></ul><p>\u6765\u770B\u4F8B\u5B50\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">List</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">String</span><span class="token punctuation">&gt;</span></span> list <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">ArrayList</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token punctuation">&gt;</span></span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 list<span class="token punctuation">.</span><span class="token function">add</span><span class="token punctuation">(</span><span class="token string">&quot;\u6C89\u9ED8\u738B\u4E8C&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 list<span class="token punctuation">.</span><span class="token function">add</span><span class="token punctuation">(</span><span class="token string">&quot;\u6C89\u9ED8\u738B\u4E09&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 list<span class="token punctuation">.</span><span class="token function">add</span><span class="token punctuation">(</span><span class="token string">&quot;\u6C89\u9ED8\u738B\u56DB&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
diff --git a/dist/assets/comparable-omparator.html.c8fb7fdb.js b/dist/assets/comparable-omparator.html.1a3bff07.js
similarity index 99%
rename from dist/assets/comparable-omparator.html.c8fb7fdb.js
rename to dist/assets/comparable-omparator.html.1a3bff07.js
index 5c602761..23cbca7c 100644
--- a/dist/assets/comparable-omparator.html.c8fb7fdb.js
+++ b/dist/assets/comparable-omparator.html.1a3bff07.js
@@ -1,4 +1,4 @@
-import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e as p}from"./app.a0271b9c.js";const t={},e=p(`<h1 id="\u8BE6\u89E3java\u4E2Dcomparable\u548Ccomparator\u7684\u533A\u522B" tabindex="-1"><a class="header-anchor" href="#\u8BE6\u89E3java\u4E2Dcomparable\u548Ccomparator\u7684\u533A\u522B" aria-hidden="true">#</a> \u8BE6\u89E3Java\u4E2DComparable\u548CComparator\u7684\u533A\u522B</h1><p>\u90A3\u5929\uFF0C\u5C0F\u4E8C\u53BB\u9A6C\u8702\u7A9D\u9762\u8BD5\uFF0C\u9762\u8BD5\u5B98\u8001\u738B\u4E00\u4E0A\u6765\u5C31\u7529\u7ED9\u4E86\u4ED6\u4E00\u9053\u9762\u8BD5\u9898\uFF1A\u8BF7\u95EEComparable\u548CComparator\u6709\u4EC0\u4E48\u533A\u522B\uFF1F\u5C0F\u4E8C\u5DEE\u70B9\u7B11\u51FA\u58F0\uFF0C\u56E0\u4E3A\u4E09\u5E74\u524D\uFF0C\u4E5F\u5C31\u662F 2021 \u5E74\uFF0C\u4ED6\u5728\u300AJava \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF\u300B\u4E13\u680F\u4E0A\u770B\u5230\u8FC7\u8FD9\u9898\u{1F606}\u3002</p><p>Comparable \u548C Comparator \u662F Java \u7684\u4E24\u4E2A\u63A5\u53E3\uFF0C\u4ECE\u540D\u5B57\u4E0A\u6211\u4EEC\u5C31\u80FD\u591F\u8BFB\u51FA\u6765\u5B83\u4EEC\u4FE9\u7684\u76F8\u4F3C\u6027\uFF1A\u4EE5\u67D0\u79CD\u65B9\u5F0F\u6765\u6BD4\u8F83\u4E24\u4E2A\u5BF9\u8C61\u3002\u4F46\u5B83\u4EEC\u4E4B\u95F4\u5230\u5E95\u6709\u4EC0\u4E48\u533A\u522B\u5462\uFF1F\u8BF7\u968F\u6211\u6765\uFF0C\u6253\u602A\u8FDB\u9636\u55BD\uFF01</p><h3 id="_01\u3001comparable" tabindex="-1"><a class="header-anchor" href="#_01\u3001comparable" aria-hidden="true">#</a> 01\u3001Comparable</h3><p>Comparable \u63A5\u53E3\u7684\u5B9A\u4E49\u975E\u5E38\u7B80\u5355\uFF0C\u6E90\u7801\u5982\u4E0B\u6240\u793A\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">interface</span> <span class="token class-name">Comparable</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">T</span><span class="token punctuation">&gt;</span></span> <span class="token punctuation">{</span>
+import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e as p}from"./app.615e41d8.js";const t={},e=p(`<h1 id="\u8BE6\u89E3java\u4E2Dcomparable\u548Ccomparator\u7684\u533A\u522B" tabindex="-1"><a class="header-anchor" href="#\u8BE6\u89E3java\u4E2Dcomparable\u548Ccomparator\u7684\u533A\u522B" aria-hidden="true">#</a> \u8BE6\u89E3Java\u4E2DComparable\u548CComparator\u7684\u533A\u522B</h1><p>\u90A3\u5929\uFF0C\u5C0F\u4E8C\u53BB\u9A6C\u8702\u7A9D\u9762\u8BD5\uFF0C\u9762\u8BD5\u5B98\u8001\u738B\u4E00\u4E0A\u6765\u5C31\u7529\u7ED9\u4E86\u4ED6\u4E00\u9053\u9762\u8BD5\u9898\uFF1A\u8BF7\u95EEComparable\u548CComparator\u6709\u4EC0\u4E48\u533A\u522B\uFF1F\u5C0F\u4E8C\u5DEE\u70B9\u7B11\u51FA\u58F0\uFF0C\u56E0\u4E3A\u4E09\u5E74\u524D\uFF0C\u4E5F\u5C31\u662F 2021 \u5E74\uFF0C\u4ED6\u5728\u300AJava \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF\u300B\u4E13\u680F\u4E0A\u770B\u5230\u8FC7\u8FD9\u9898\u{1F606}\u3002</p><p>Comparable \u548C Comparator \u662F Java \u7684\u4E24\u4E2A\u63A5\u53E3\uFF0C\u4ECE\u540D\u5B57\u4E0A\u6211\u4EEC\u5C31\u80FD\u591F\u8BFB\u51FA\u6765\u5B83\u4EEC\u4FE9\u7684\u76F8\u4F3C\u6027\uFF1A\u4EE5\u67D0\u79CD\u65B9\u5F0F\u6765\u6BD4\u8F83\u4E24\u4E2A\u5BF9\u8C61\u3002\u4F46\u5B83\u4EEC\u4E4B\u95F4\u5230\u5E95\u6709\u4EC0\u4E48\u533A\u522B\u5462\uFF1F\u8BF7\u968F\u6211\u6765\uFF0C\u6253\u602A\u8FDB\u9636\u55BD\uFF01</p><h3 id="_01\u3001comparable" tabindex="-1"><a class="header-anchor" href="#_01\u3001comparable" aria-hidden="true">#</a> 01\u3001Comparable</h3><p>Comparable \u63A5\u53E3\u7684\u5B9A\u4E49\u975E\u5E38\u7B80\u5355\uFF0C\u6E90\u7801\u5982\u4E0B\u6240\u793A\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">interface</span> <span class="token class-name">Comparable</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">T</span><span class="token punctuation">&gt;</span></span> <span class="token punctuation">{</span>
     <span class="token keyword">int</span> <span class="token function">compareTo</span><span class="token punctuation">(</span><span class="token class-name">T</span> t<span class="token punctuation">)</span><span class="token punctuation">;</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>\u5982\u679C\u4E00\u4E2A\u7C7B\u5B9E\u73B0\u4E86 Comparable \u63A5\u53E3\uFF08\u53EA\u9700\u8981\u5E72\u4E00\u4EF6\u4E8B\uFF0C\u91CD\u5199 <code>compareTo()</code> \u65B9\u6CD5\uFF09\uFF0C\u5C31\u53EF\u4EE5\u6309\u7167\u81EA\u5DF1\u5236\u5B9A\u7684\u89C4\u5219\u5C06\u7531\u5B83\u521B\u5EFA\u7684\u5BF9\u8C61\u8FDB\u884C\u6BD4\u8F83\u3002\u4E0B\u9762\u7ED9\u51FA\u4E00\u4E2A\u4F8B\u5B50\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">Cmower</span> <span class="token keyword">implements</span> <span class="token class-name">Comparable</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">Cmower</span><span class="token punctuation">&gt;</span></span> <span class="token punctuation">{</span>
diff --git a/dist/assets/compile-jdk.html.2e638e51.js b/dist/assets/compile-jdk.html.fddb4940.js
similarity index 99%
rename from dist/assets/compile-jdk.html.2e638e51.js
rename to dist/assets/compile-jdk.html.fddb4940.js
index 3f7ecc46..8f69ca1a 100644
--- a/dist/assets/compile-jdk.html.2e638e51.js
+++ b/dist/assets/compile-jdk.html.fddb4940.js
@@ -1 +1 @@
-import{_ as a}from"./plugin-vue_export-helper.21dcd24c.js";import{r as t,o as r,c as p,a as o,b as i,e as c,d as e}from"./app.a0271b9c.js";const n={},s=c('<h1 id="\u81EA\u5DF1\u7F16\u8BD1jdk" tabindex="-1"><a class="header-anchor" href="#\u81EA\u5DF1\u7F16\u8BD1jdk" aria-hidden="true">#</a> \u81EA\u5DF1\u7F16\u8BD1JDK</h1><p>\u5F15\u7528\u94FE\u63A5\uFF1Ahttps://segmentfault.com/a/1190000023251649</p><p>\u5F88\u591A\u5C0F\u4F19\u4F34\u4EEC\u505A<code>Java</code>\u5F00\u53D1\uFF0C\u5929\u5929\u5199<code>Java</code>\u4EE3\u7801\uFF0C\u80AF\u5B9A\u79BB\u4E0D\u5F00<code>Java</code>\u57FA\u7840\u73AF\u5883\uFF1A<code>JDK</code>\uFF0C\u6BD5\u7ADF\u6211\u4EEC\u5199\u597D\u7684<code>Java</code>\u4EE3\u7801\u4E5F\u662F\u8DD1\u5728<code>JVM</code>\u865A\u62DF\u673A\u4E0A\u3002</p><p>\u4E00\u822C\u6765\u8BF4\uFF0C\u6211\u4EEC\u5B66<code>Java</code>\u4E4B\u524D\uFF0C\u7B2C\u4E00\u6B65\u5C31\u662F\u5B89\u88C5<code>JDK</code>\u73AF\u5883\u3002\u8FD9\u4E2A\u7B80\u5355\u554A\uFF0C\u6211\u4EEC\u4E00\u822C\u76F4\u63A5\u628A<code>JDK</code>\u4ECE\u5B98\u7F51\u4E0B\u8F7D\u4E0B\u6765\uFF0C\u5B89\u88C5\u5B8C\u6210\uFF0C\u914D\u4E2A\u73AF\u5883\u53D8\u91CF\u5C31\u53EF\u4EE5\u6109\u5FEB\u5730\u4F7F\u7528\u4E86\u3002</p><p>\u4E0D\u8FC7\u8BDD\u8BF4\u56DE\u6765\uFF0C\u5BF9\u4E8E\u8FD9\u4E2A\u5929\u5929\u4F7F\u7528\u7684\u4E1C\u897F\uFF0C\u6211\u4EEC\u96BE\u9053\u4E0D\u597D\u5947\u8FD9\u73A9\u610F\u513F\u5B83\u5230\u5E95\u662F\u600E\u4E48\u7531\u6E90\u7801\u7F16\u8BD1\u51FA\u6765\u7684\u5417\uFF1F</p><p>\u5E26\u7740\u8FD9\u4E2A\u539F\u59CB\u7684\u7591\u95EE\uFF0C\u4ECA\u5929\u51C6\u5907\u5927\u5E72\u4E00\u573A\uFF0C\u81EA\u5DF1\u52A8\u52A8\u5446\u840C\u7684\u5C0F\u624B\uFF0C\u6765\u7F16\u8BD1\u4E00\u4E2A\u5C5E\u4E8E\u81EA\u5DF1\u7684<code>JDK</code>\u5427\uFF01</p><h2 id="\u73AF\u5883\u51C6\u5907" tabindex="-1"><a class="header-anchor" href="#\u73AF\u5883\u51C6\u5907" aria-hidden="true">#</a> \u73AF\u5883\u51C6\u5907</h2><blockquote><p>\u9996\u9009\u8BF4\u5728\u524D\u9762\u7684\u662F\uFF0C\u7F16\u8BD1\u524D\u7684\u8F6F\u4EF6\u7248\u672C\u5173\u7CFB\u6781\u5176\u91CD\u8981\uFF0C\u81EA\u5DF1\u5728\u8E29\u5751\u65F6\uFF0C\u6240\u51FA\u73B0\u7684\u5404\u79CD\u5947\u5947\u602A\u602A\u7684\u95EE\u9898\u51E0\u4E4E\u90FD\u548C\u8FD9\u4E2A\u6709\u5173\uFF0C\u540E\u6765\u7248\u672C\u5339\u914D\u4E4B\u540E\uFF0C\u5C31\u975E\u5E38\u987A\u5229\u4E86\u3002</p></blockquote><p>\u6211\u4EEC\u6765<strong>\u76D8\u70B9\u548C\u68B3\u7406</strong>\u4E00\u4E0B\u7F16\u8BD1\u4E00\u4E2AJDK\u9700\u8981\u54EA\u4E9B\u73AF\u5883\u548C\u5DE5\u5177\uFF1A</p><h3 id="_1\u3001boot-jdk" tabindex="-1"><a class="header-anchor" href="#_1\u3001boot-jdk" aria-hidden="true">#</a> <strong>1\u3001boot JDK</strong></h3><p>\u6211\u4EEC\u8981\u60F3\u7F16\u8BD1<code>JDK</code>\uFF0C\u9996\u5148\u81EA\u5DF1\u672C\u673A\u5FC5\u987B\u63D0\u524D\u5DF2\u7ECF\u5B89\u88C5\u6709\u4E00\u4E2A<code>JDK</code>\uFF0C\u5B98\u65B9\u79F0\u4E4B\u4E3A<code>bootstrap JDK</code>\uFF08\u6216\u8005\u79F0\u4E3A<code>boot JDK</code>\uFF09\u3002</p><p>\u6BD4\u5982\u60F3\u7F16\u8BD1<code>JDK 8</code>\uFF0C\u90A3\u672C\u673A\u5FC5\u987B\u6700\u8D77\u7801\u5F97\u6709\u4E00\u4E2A<code>JDK 7</code>\u6216\u8005\u66F4\u65B0\u4E00\u70B9\u7684\u7248\u672C\uFF1B\u4F60\u60F3\u7F16\u8BD1<code>JDK 11</code>\uFF0C\u90A3\u5C31\u8981\u6C42\u672C\u673A\u5FC5\u987B\u88C5\u6709<code>JDK 10</code>\u6216\u8005<code>11</code>\u3002</p><blockquote><p>\u6240\u4EE5\u9E21\u751F\u86CB\u3001\u86CB\u751F\u9E21\u53C8\u6765\u4E86...</p></blockquote><h3 id="_2\u3001unix\u73AF\u5883" tabindex="-1"><a class="header-anchor" href="#_2\u3001unix\u73AF\u5883" aria-hidden="true">#</a> <strong>2\u3001Unix\u73AF\u5883</strong></h3><p>\u7F16\u8BD1<code>JDK</code>\u9700\u8981<code>Unix</code>\u73AF\u5883\u7684\u652F\u6301\uFF01</p><p>\u8FD9\u4E00\u70B9\u5728<code>Linux</code>\u64CD\u4F5C\u7CFB\u7EDF\u548C<code>macOS</code>\u64CD\u4F5C\u7CFB\u7EDF\u4E0A\u5DF2\u7ECF\u5929\u7136\u7684\u4FDD\u8BC1\u4E86\uFF0C\u800C\u5BF9\u4E8E<code>Windows</code>\u5144\u5F1F\u6765\u8BF4\u7A0D\u5FAE\u9EBB\u70E6\u4E00\u70B9\uFF0C\u9700\u8981\u901A\u8FC7\u4F7F\u7528<code>Cygwin</code>\u6216\u8005<code>MinGW/MSYS</code>\u8FD9\u79CD\u8F6F\u4EF6\u6765\u6A21\u62DF\u3002</p><p>\u5C31\u50CF\u5B98\u65B9\u6240\u8BF4\uFF1A\u5728<code>Linux</code>\u5E73\u53F0\u7F16\u8BD1<code>JDK</code>\u4E00\u822C\u95EE\u9898\u6700\u5C11\uFF0C\u5BB9\u6613\u6210\u529F\uFF1B<code>macOS</code>\u6B21\u4E4B\uFF1B<code>Windows</code>\u4E0A\u5219\u9700\u8981\u7A0D\u5FAE\u591A\u82B1\u70B9\u7CBE\u529B\uFF0C\u95EE\u9898\u53EF\u80FD\u4E5F\u591A\u4E00\u4E9B\u3002</p><p>\u7A76\u5176\u672C\u8D28\u539F\u56E0\uFF0C\u8FD8\u662F\u56E0\u4E3A<code>Windows</code>\u6BD5\u7ADF\u4E0D\u662F\u4E00\u4E2A<code>Unix-Like</code>\u5185\u6838\u7684\u7CFB\u7EDF\uFF0C\u6BD5\u7ADF\u5F88\u591A\u8F6F\u4EF6\u7684\u539F\u59CB\u7F16\u8BD1\u90FD\u79BB\u4E0D\u5F00<code>Unix Toolkit</code>\uFF0C\u6240\u4EE5\u76F8\u5BF9\u80AF\u5B9A\u8981\u9EBB\u70E6\u4E00\u4E9B\u3002</p><h3 id="_3\u3001\u7F16\u8BD1\u5668-\u7F16\u8BD1\u5DE5\u5177\u94FE" tabindex="-1"><a class="header-anchor" href="#_3\u3001\u7F16\u8BD1\u5668-\u7F16\u8BD1\u5DE5\u5177\u94FE" aria-hidden="true">#</a> <strong>3\u3001\u7F16\u8BD1\u5668/\u7F16\u8BD1\u5DE5\u5177\u94FE</strong></h3><p><code>JDK</code>\u5E95\u5C42\u6E90\u7801\uFF08\u5C24\u5176<code>JVM</code>\u865A\u62DF\u673A\u90E8\u5206\uFF09\u5F88\u591A\u90FD\u662F<code>C++/C</code>\u5199\u7684\uFF0C\u6240\u4EE5\u76F8\u5173\u7F16\u8BD1\u5668\u4E5F\u8DD1\u4E0D\u6389\u3002</p><p>\u4E00\u56FE\u80DC\u5343\u8A00\uFF0C\u5404\u5E73\u53F0\u4E0A\u7684\u7F16\u8BD1\u5668\u652F\u6301\u5982\u4E0B\u8868\u6240\u793A\uFF0C\u6309\u5E73\u53F0\u9009\u62E9\u5373\u53EF\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-3b66d5b6-272f-47bd-88f7-47146a06ef06.png" alt=""></p><h3 id="_4\u3001\u5176\u4ED6\u5DE5\u5177" tabindex="-1"><a class="header-anchor" href="#_4\u3001\u5176\u4ED6\u5DE5\u5177" aria-hidden="true">#</a> <strong>4\u3001\u5176\u4ED6\u5DE5\u5177</strong></h3><p>\u5178\u578B\u7684\u6BD4\u5982\uFF1A</p><ul><li><code>Autoconf</code>\uFF1A\u8F6F\u4EF6\u6E90\u7801\u5305\u7684\u81EA\u52A8\u914D\u7F6E\u5DE5\u5177</li><li><code>Make</code>\uFF1A\u7F16\u8BD1\u6784\u5EFA\u5DE5\u5177</li><li><code>freetype</code>\uFF1A\u4E00\u4E2A\u514D\u8D39\u7684\u6E32\u67D3\u5E93\uFF0C<code>JDK</code>\u56FE\u5F62\u5316\u90E8\u5206\u7684\u4EE3\u7801\u53EF\u80FD\u4F1A\u7528\u5B83</li></ul><p>\u597D\uFF0C\u73AF\u5883\u76D8\u70B9\u5C31\u5230\u8FD9\u91CC\uFF0C\u63A5\u4E0B\u6765\u5177\u4F53\u5217\u4E00\u4E0B\u6211\u5728\u7F16\u8BD1<code>JDK 8</code>\u548C<code>JDK 11</code>\u65F6\u5206\u522B\u7528\u5230\u7684\u8F6F\u4EF6\u8BE6\u7EC6\u7248\u672C\u4FE1\u606F\uFF1A</p><p><strong>\u7F16\u8BD1JDK 8\u65F6\uFF1A</strong></p><ul><li><code>\u64CD\u4F5C\u7CFB\u7EDF</code>\uFF1AmacOS 10.11.6</li><li><code>boot JDK</code>\uFF1AJDK 1.8.0 (build 1.8.0_201-b09)</li><li><code>Xcode\u7248\u672C</code>\uFF1A8.2</li><li><code>\u7F16\u8BD1\u5668</code>\uFF1AVersion 8.0.0 (at /usr/bin/clang)</li></ul><p><strong>\u7F16\u8BD1JDK 11\u65F6\uFF1A</strong></p><ul><li><code>\u64CD\u4F5C\u7CFB\u7EDF</code>\uFF1AmacOS 10.15.4</li><li><code>boot JDK</code>\uFF1AJDK 11.0.7 (build 11.0.7+8-LTS)</li><li><code>Xcode\u7248\u672C</code>\uFF1A11.5</li><li><code>\u7F16\u8BD1\u5668</code>\uFF1AVersion 11.0.3 (at /usr/bin/clang)</li></ul><p>\u5927\u5BB6\u5728\u7F16\u8BD1\u65F6\u5982\u679C\u8FC7\u7A0B\u4E2D\u6709\u5F88\u591A\u95EE\u9898\uFF0C\u5927\u6982\u7387\u5C11\u8F6F\u4EF6\u6CA1\u88C5\uFF0C\u6216\u8005\u8F6F\u4EF6\u7248\u672C\u4E0D\u5339\u914D\uFF0C\u4E0D\u8981\u8F7B\u6613\u653E\u5F03\uFF0C\u9700\u8981\u8010\u5FC3\u81EA\u67E5\u4E00\u4E0B\u3002</p><hr><h2 id="\u4E0B\u8F7Djdk\u6E90\u7801" tabindex="-1"><a class="header-anchor" href="#\u4E0B\u8F7Djdk\u6E90\u7801" aria-hidden="true">#</a> \u4E0B\u8F7DJDK\u6E90\u7801</h2><p>\u4E0B\u8F7D<code>JDK</code>\u6E90\u7801\u5176\u5B9E\u6709\u4E24\u79CD\u65B9\u5F0F\u3002</p><h3 id="\u65B9\u5F0F\u4E00-\u901A\u8FC7mercurial\u5DE5\u5177\u4E0B\u8F7D" tabindex="-1"><a class="header-anchor" href="#\u65B9\u5F0F\u4E00-\u901A\u8FC7mercurial\u5DE5\u5177\u4E0B\u8F7D" aria-hidden="true">#</a> <strong>\u65B9\u5F0F\u4E00\uFF1A\u901A\u8FC7Mercurial\u5DE5\u5177\u4E0B\u8F7D</strong></h3><p><code>Mercurial</code>\u53EF\u4EE5\u7406\u89E3\u4E3A\u548C<code>Git</code>\u4E00\u6837\uFF0C\u662F\u53E6\u5916\u4E00\u79CD\u4EE3\u7801\u7BA1\u7406\u5DE5\u5177\uFF0C\u5B89\u88C5\u597D\u4E4B\u540E\u5C31\u6709\u4E00\u4E2A<code>hg</code>\u547D\u4EE4\u53EF\u7528\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-cd8a19ba-e9f5-4a4a-a23c-17688f0f459d.png" alt=""></p><p>\u800C<code>OpenJDK</code>\u7684\u6E90\u7801\u5DF2\u7ECF\u63D0\u524D\u6258\u7BA1\u5230<code>http://hg.openjdk.java.net/</code>\u3002</p><p>\u56E0\u6B64\uFF0C\u6BD4\u5982\u4E0B\u8F7D<code>JDK 8</code>\uFF0C\u53EF\u76F4\u63A5<code>hg clone</code>\u4E00\u4E0B\u5C31\u884C\uFF0C\u548C<code>git clone</code>\u4E00\u6837\uFF1A</p><p><code>hg\xA0clone\xA0[http://hg.openjdk.java.net/jd...](https://link.segmentfault.com/?enc=Snt8gNbYV7nkV3etTe%2FGJw%3D%3D.7IrUNCuc0HOEyvjCiCBOPMEBJ09bjLifieJi0I7iwtuuIeYUdSfCkC9c4D7z9wdq) </code></p><p>\u540C\u7406\uFF0C\u4E0B\u8F7D<code>JDK 11</code>\uFF1A</p><p><code>hg\xA0clone\xA0[http://hg.openjdk.java.net/jd...](https://link.segmentfault.com/?enc=BnHqAYXzfRcVfPgGgo1yOw%3D%3D.011np6%2FiCLuojl%2FBtvROkTVXr0PSdMYcYpAg2WUIE045BEFIrbCNAD42vWwIUb3d) </code></p><p>\u4F46\u662F\u8FD9\u79CD\u65B9\u5F0F\u4E0B\u8F7D\u901F\u5EA6\u4E0D\u662F\u5F88\u5FEB\u3002</p><h3 id="\u65B9\u5F0F\u4E8C-\u76F4\u63A5\u4E0B\u8F7D\u6253\u5305\u597D\u7684\u6E90\u7801\u5305" tabindex="-1"><a class="header-anchor" href="#\u65B9\u5F0F\u4E8C-\u76F4\u63A5\u4E0B\u8F7D\u6253\u5305\u597D\u7684\u6E90\u7801\u5305" aria-hidden="true">#</a> <strong>\u65B9\u5F0F\u4E8C\uFF1A\u76F4\u63A5\u4E0B\u8F7D\u6253\u5305\u597D\u7684\u6E90\u7801\u5305</strong></h3><p>\u4E0B\u8F7D\u5730\u5740\uFF1A<code>https://jdk.java.net/</code></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-1bbbb1f8-da01-46e1-a793-487a25193c68.png" alt=""></p><p>\u9009\u62E9\u4F60\u60F3\u8981\u7684\u7248\u672C\u4E0B\u8F7D\u5373\u53EF\u3002</p><hr><h3 id="\u7F16\u8BD1\u524D\u7684\u81EA\u52A8\u914D\u7F6E" tabindex="-1"><a class="header-anchor" href="#\u7F16\u8BD1\u524D\u7684\u81EA\u52A8\u914D\u7F6E" aria-hidden="true">#</a> \u7F16\u8BD1\u524D\u7684\u81EA\u52A8\u914D\u7F6E</h3><p>\u6E90\u7801\u5305\u4E0B\u8F7D\u597D\uFF0C\u653E\u5230\u672C\u5730\u67D0\u4E2A\u76EE\u5F55\uFF08\u5EFA\u8BAE\u8DEF\u5F84\u7EAF\u82F1\u6587\uFF0C\u907F\u514D\u4E0D\u5FC5\u8981\u7684\u9EBB\u70E6\uFF09\uFF0C\u89E3\u538B\u4E4B\uFF0C\u7136\u540E\u8FDB\u5165\u6E90\u7801\u6839\u76EE\u5F55\uFF0C\u6267\u884C\uFF1A</p><p><code>sh\xA0configure </code></p><blockquote><p>\u5F53\u7136\u8FD9\u91CC\u8FD0\u884C\u7684\u662F\u9ED8\u8BA4\u914D\u7F6E\u9879\u3002</p></blockquote><p>\u8FD9\u4E00\u6B65\u4F1A\u8FDB\u884C\u4E00\u7CFB\u5217\u7684\u81EA\u52A8\u914D\u7F6E\u5DE5\u4F5C\uFF0C\u65F6\u95F4\u4E00\u822C\u5F88\u5FEB\uFF0C\u6700\u7EC8\u5982\u679C\u80FD\u51FA\u73B0\u4E00\u4E0B\u63D0\u793A\uFF0C\u90A3\u4E48\u5F88\u5E78\u8FD0\uFF0C\u7F16\u8BD1\u524D\u7684\u914D\u7F6E\u5DE5\u4F5C\u5C31\u5B8C\u6210\u4E86\uFF01</p><p>\u8FD9\u91CC\u6211\u7ED9\u51FA\u6211\u81EA\u5DF1\u5206\u522B\u5728\u914D\u7F6E<code>JDK 11</code>\u548C<code>JDK 8</code>\u65F6\u5019\u5B8C\u6210\u65F6\u7684\u6837\u5B50\uFF1A</p><p><strong>\u914D\u7F6EJDK 8\u5B8C\u6210\uFF1A</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-27593edc-03e2-4a42-baf3-ed5e5096b3cb.png" alt=""></p><p><strong>\u914D\u7F6EJDK 11\u5B8C\u6210\uFF1A</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-8526d944-a36e-4d37-93a0-9ad4ad53f927.png" alt=""></p><p><strong>\u6CE8\uFF1A</strong>\xA0\u5982\u679C\u8FD9\u4E00\u6B65\u51FA\u9519\uFF0C\u5927\u6982\u7387\u662F\u67D0\u4E2A\u8F6F\u4EF6\u73AF\u5883\u672A\u88C5\uFF0C\u6216\u8005\u5373\u4F7F\u88C5\u4E86\uFF0C\u4F46\u7248\u672C\u4E0D\u5339\u914D\uFF0C\u63A7\u5236\u53F0\u6253\u5370\u65E5\u5FD7\u91CC\u4E00\u822C\u662F\u4F1A\u63D0\u9192\u7684\u3002</p><p>\u6BD4\u5982\u6211\u5728\u914D\u7F6E<code>JDK 8</code>\u7684\u65F6\u5019\uFF0C\u5C31\u9047\u5230\u4E86\u4E00\u4E2A<code>errof\uFF1AGCC compiler is required</code>\u7684\u95EE\u9898\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-2957399f-6451-46dc-a003-76e5159265e9.png" alt=""></p><p>\u660E\u660E\u7CFB\u7EDF\u91CC\u5DF2\u7ECF\u6709\u7F16\u8BD1\u5668\uFF0C\u4F46\u8FD8\u662F\u62A5\u8FD9\u4E2A\u9519\u8BEF\u3002\u901A\u8FC7\u540E\u6765\u4FEE\u6539\xA0<code>jdk\u6E90\u7801\u6839\u76EE\u5F55/common/autoconf/generated-configure.sh</code>\u6587\u4EF6\uFF0C\u5C06\u76F8\u5173\u7684\u4E24\u884C\u4EE3\u7801\u6CE8\u91CA\u540E\u5C31\u914D\u7F6E\u901A\u8FC7\u4E86</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-ffa10d36-3a77-48aa-ae0c-d3daf67f9a19.png" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-a6f6e416-639e-4706-8b40-6152eb3cf85d.png" alt=""></p><p>\u914D\u7F6E\u5B8C\u6210\uFF0C\u63A5\u4E0B\u6765\u5F00\u59CB\u6267\u884C\u771F\u6B63\u7684\u7F16\u8BD1\u52A8\u4F5C\u4E86\uFF01</p><hr><h2 id="\u771F\u6B63\u7684\u7F16\u8BD1\u52A8\u4F5C" tabindex="-1"><a class="header-anchor" href="#\u771F\u6B63\u7684\u7F16\u8BD1\u52A8\u4F5C" aria-hidden="true">#</a> \u771F\u6B63\u7684\u7F16\u8BD1\u52A8\u4F5C</h2><p>\u6211\u4EEC\u8FD9\u91CC\u8FDB\u884C\u7684\u662F\u5168\u91CF\u7F16\u8BD1\uFF0C\u76F4\u63A5\u5728\u6211\u4EEC\u4E0B\u8F7D\u7684<code>JDK</code>\u6E90\u7801\u6839\u76EE\u5F55\u4E0B\u6267\u884C\u5982\u4E0B\u547D\u4EE4\u5373\u53EF\uFF1A</p><p><code>make\xA0all </code></p><p>\u8FD9\u4E00\u6B65\u7F16\u8BD1\u9700\u8981\u4E00\u70B9\u65F6\u95F4\uFF0C\u8010\u5FC3\u7B49\u5F85\u4E00\u4E0B\u5373\u53EF\u3002\u7F16\u8BD1\u8FC7\u7A0B\u5982\u679C\u6709\u9519\u8BEF\uFF0C\u4F1A\u7EC8\u6B62\u7F16\u8BD1\uFF0C\u5982\u679C\u80FD\u770B\u5230\u5982\u4E0B\u4E24\u4E2A\u753B\u9762\uFF0C\u90A3\u4E48\u5219\u606D\u559C\u4F60\uFF0C\u81EA\u5DF1\u7F16\u8BD1<code>JDK</code>\u6E90\u7801\u5C31\u5DF2\u7ECF\u901A\u8FC7\u4E86\uFF0C\u53EF\u4EE5\u641E\u4E00\u676F\u5496\u5561\u5E86\u795D\u4E00\u4E0B\u4E86\u3002</p><p><strong>JDK 8\u7F16\u8BD1\u5B8C\u6210\uFF1A</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-89020f5a-0909-4c57-8c88-f655293a42a4.png" alt=""></p><p><strong>JDK 11\u7F16\u8BD1\u5B8C\u6210\uFF1A</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-993fac94-2473-4f3b-9737-959510d2fe98.png" alt=""></p><p>\u4ECE\u4E24\u5F20\u56FE\u7684\u5BF9\u6BD4\u53EF\u4EE5\u770B\u51FA\uFF0C\u7F16\u8BD1<code>JDK 8</code>\u548C<code>JDK 11</code>\u5B8C\u6210\u65F6\u5728\u8F93\u51FA\u4E0A\u8FD8\u662F\u6709\u533A\u522B\u7684\u3002\u65F6\u95F4\u4E0A\u7684\u533A\u522B\u5F88\u5927\u7A0B\u5EA6\u4E0A\u6765\u6E90\u4E8E<code>JDK 11</code>\u7684\u7F16\u8BD1\u673A\u914D\u7F6E\u8981\u9AD8\u4E0D\u5C11\u3002</p><hr><h2 id="\u9A8C\u8BC1\u6210\u679C" tabindex="-1"><a class="header-anchor" href="#\u9A8C\u8BC1\u6210\u679C" aria-hidden="true">#</a> \u9A8C\u8BC1\u6210\u679C</h2><p><code>JDK</code>\u6E90\u7801\u7F16\u8BD1\u5B8C\u6210\u4E4B\u540E\u80AF\u5B9A\u4F1A\u4EA7\u751F\u548C\u8F93\u51FA\u5F88\u591A\u4EA7\u7269\uFF0C\u8FD9\u4E5F\u662F\u6211\u4EEC\u6240\u8FEB\u4E0D\u53CA\u5F85\u60F3\u770B\u5230\u7684\u3002</p><p>\u7531\u4E8E<code>JDK 8</code>\u548C<code>JDK 11</code>\u7684\u6E90\u7801\u5305\u7EC4\u7EC7\u7ED3\u6784\u5E76\u4E0D\u4E00\u6837\uFF0C\u6240\u4EE5\u8F93\u51FA\u4E1C\u897F\u7684\u5185\u5BB9\u548C\u4F4D\u7F6E\u4E5F\u6709\u533A\u522B\u3002\u6211\u4EEC\u4E00\u4E00\u6765\u76D8\u70B9\u4E00\u4E0B\u3002</p><h3 id="_1\u3001jdk-8\u7684\u7F16\u8BD1\u8F93\u51FA" tabindex="-1"><a class="header-anchor" href="#_1\u3001jdk-8\u7684\u7F16\u8BD1\u8F93\u51FA" aria-hidden="true">#</a> <strong>1\u3001JDK 8\u7684\u7F16\u8BD1\u8F93\u51FA</strong></h3><p>\u7F16\u8BD1\u5B8C\u6210\uFF0C<code>build</code>\u76EE\u5F55\u4E0B\u4F1A\u751F\u6210\u4E00\u4E2A<code>macosx-x86_64-normal-server-release</code>\u76EE\u5F55\uFF0C\u6240\u6709\u7684\u7F16\u8BD1\u6210\u679C\u5747\u4F4D\u4E8E\u5176\u4E2D\u3002</p><p>\u9996\u5148\uFF0C\u7F16\u8BD1\u51FA\u6765\u7684<code>Java</code>\u53EF\u6267\u884C\u7A0B\u5E8F\u53EF\u4EE5\u5728\u5982\u4E0B\u76EE\u5F55\u91CC\u627E\u5230\uFF1A</p><p><code>jdk\u6E90\u7801\u6839\u76EE\u5F55/build/macosx-x86_64-normal-server-release/jdk/bin</code></p><p>\u8FDB\u5165\u8BE5\u76EE\u5F55\u540E\uFF0C\u53EF\u4EE5\u8F93\u5165<code>./java -version</code>\u547D\u4EE4\u9A8C\u8BC1\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-f02dff40-f27e-476c-998b-bd6cdb5d3559.png" alt=""></p><p>\u5176\u6B21\uFF0C\u7F16\u8BD1\u751F\u6210\u7684\u6210\u54C1<code>JDK</code>\u5957\u88C5\uFF0C\u53EF\u4EE5\u5728\u76EE\u5F55</p><p><code>jdk\u6E90\u7801\u6839\u76EE\u5F55/build/macosx-x86_64-normal-server-release/images </code></p><p>\u4E0B\u627E\u5230\uFF0C\u5982\u56FE\u6240\u793A\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-1c781d34-776e-4acc-8d2b-b34bc59fda61.png" alt=""></p><p>\u5176\u4E2D\uFF1A</p><ul><li><code>j2sdk-image</code>\uFF1A\u7F16\u8BD1\u751F\u6210\u7684JDK</li><li><code>j2re-image</code>\uFF1A\u7F16\u8BD1\u751F\u6210\u7684JRE</li></ul><p>\u8FDB\u5165<code>j2sdk-image</code>\u76EE\u5F55\u4F1A\u53D1\u73B0\uFF0C\u91CC\u9762\u7684\u5185\u5BB9\u548C\u6211\u4EEC\u5E73\u65F6\u4ECE\u7F51\u7EDC\u4E0A\u4E0B\u8F7D\u7684\u6210\u54C1<code>JDK</code>\u5185\u5BB9\u4E00\u81F4\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-7b7f147e-58c9-4eb5-b407-b8984cd72e1d.png" alt=""></p><h3 id="_2\u3001jdk-11\u7684\u7F16\u8BD1\u8F93\u51FA" tabindex="-1"><a class="header-anchor" href="#_2\u3001jdk-11\u7684\u7F16\u8BD1\u8F93\u51FA" aria-hidden="true">#</a> <strong>2\u3001JDK 11\u7684\u7F16\u8BD1\u8F93\u51FA</strong></h3><blockquote><p>JDK 11\u7684\u6E90\u7801\u76EE\u5F55\u7EC4\u7EC7\u65B9\u5F0F\u548CJDK 8\u672C\u8EAB\u5C31\u6709\u533A\u522B\uFF0C\u7F16\u8BD1\u751F\u6210\u7684\u4EA7\u7269\u548C\u4E0A\u9762\u7F16\u8BD1JDK 8\u7684\u8F93\u51FA\u6709\u4E00\u5B9A\u533A\u522B\uFF0C\u4F46\u4E5F\u4E0D\u5927\u3002</p></blockquote><p><code>JDK 11</code>\u7F16\u8BD1\u5B8C\u6210\uFF0C\u540C\u6837\u5728<code>build</code>\u76EE\u5F55\u4E0B\u4F1A\u751F\u6210\u4E00\u4E2A<code>macosx-x86_64-normal-server-release</code>\u76EE\u5F55\uFF0C\u6240\u6709\u7684\u7F16\u8BD1\u6210\u679C\u5747\u4F4D\u4E8E\u5176\u4E2D\u3002</p><p>\u540C\u6837\u7F16\u8BD1\u51FA\u6765\u7684Java\u53EF\u6267\u884C\u7A0B\u5E8F\u53EF\u4EE5\u5728\u76EE\u5F55</p><p><code>JDK\u6E90\u7801\u6839\u76EE\u5F55/build/macosx-x86_64-normal-server-release/jdk/bin</code></p><p>\u4E0B\u770B\u5230\uFF0C\u8FDB\u5165\u8BE5\u76EE\u5F55\u540E\uFF0C\u4E5F\u53EF\u4EE5\u8F93\u5165<code>./java -version</code>\u547D\u4EE4\u9A8C\u8BC1\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-f9b55425-f308-44e8-8812-ac59b2707c81.png" alt=""></p><p>\u5176\u6B21\uFF0C\u7F16\u8BD1\u751F\u6210\u7684\u6210\u54C1<code>JDK 11</code>\u5957\u88C5\uFF0C\u53EF\u4EE5\u5728\u76EE\u5F55</p><p><code>JDK\u6E90\u7801\u6839\u76EE\u5F55/build/macosx-x86_64-normal-server-release/images </code></p><p>\u4E0B\u627E\u5230\uFF0C\u5982\u56FE\u6240\u793A\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-4e96858f-f681-4498-b1c4-282d317a6a32.png" alt=""></p><p>\u5176\u4E2D<code>jdk</code>\u76EE\u5F55\u5C31\u662F\u7F16\u8BD1\u751F\u6210\u7684\u6210\u54C1<code>JDK 11</code>\u5957\u88C5\u3002</p><hr><h2 id="\u4F7F\u7528\u81EA\u5DF1\u7F16\u8BD1\u7684jdk" tabindex="-1"><a class="header-anchor" href="#\u4F7F\u7528\u81EA\u5DF1\u7F16\u8BD1\u7684jdk" aria-hidden="true">#</a> \u4F7F\u7528\u81EA\u5DF1\u7F16\u8BD1\u7684JDK</h2><p>\u65E2\u7136\u6211\u4EEC\u5DF2\u7ECF\u52A8\u624B\u7F16\u8BD1\u51FA\u4E86<code>JDK</code>\u6210\u54C1\uFF0C\u63A5\u4E0B\u6765\u6211\u4EEC\u5F97\u7528\u4E0A\u54C7\u3002</p><p>\u65B0\u5EFA\u4E00\u4E2A\u6700\u6700\u57FA\u672C\u7684<code>Java</code>\u5DE5\u7A0B\uFF0C\u6BD4\u5982\u547D\u540D\u4E3A<code>JdkTest</code>\uFF0C\u76EE\u7684\u662F\u628A\u6211\u4EEC\u81EA\u5DF1\u7F16\u8BD1\u51FA\u7684<code>JDK</code>\u7ED9\u7528\u4E0A\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-2cf54b29-9b7e-46b2-8cde-4c36960aa09b.png" alt=""></p><p>\u6211\u4EEC\u70B9\u5F00<code>Project Structure</code>\uFF0C\u9009\u5230<code>SDKs</code>\u9009\u9879\uFF0C\u65B0\u6DFB\u52A0\u4E0A\u81EA\u5DF1\u521A\u521A\u7F16\u8BD1\u751F\u6210\u7684JDK\uFF0C\u5E76\u9009\u4E3A\u9879\u76EE\u7684JDK\uFF0C\u770B\u770B\u662F\u5426\u80FD\u6B63\u5E38\u5DE5\u4F5C</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-ad8023d0-fbb7-48b1-856e-a8818677a0a5.png" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-b8d87f09-6178-44c7-9572-a2852e81318d.png" alt=""></p><p>\u70B9\u51FB\u786E\u5B9A\u4E4B\u540E\uFF0C\u6211\u4EEC\u8FD0\u884C\u4E4B\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-3164cf31-8078-46d7-bee0-22e05b0c08de.png" alt=""></p><p>\u53EF\u4EE5\u770B\u5230\u6211\u4EEC\u81EA\u5DF1\u7F16\u8BD1\u51FA\u7684JDK\u5DF2\u7ECF\u7528\u4E0A\u4E86\u3002</p><hr><h2 id="\u5173\u8054jdk\u6E90\u7801\u5E76\u4FEE\u6539" tabindex="-1"><a class="header-anchor" href="#\u5173\u8054jdk\u6E90\u7801\u5E76\u4FEE\u6539" aria-hidden="true">#</a> \u5173\u8054JDK\u6E90\u7801\u5E76\u4FEE\u6539</h2><p>\u6211\u4EEC\u7EE7\u7EED\u5728\u4E0A\u4E00\u6B65<code>JdkTest</code>\u9879\u76EE\u7684<code>Project Structure</code>\xA0\u2192\xA0<code>SDKs</code>\u91CC\u5C06<code>JDK</code>\u6E90\u7801\u5173\u8054\u5230\u81EA\u884C\u4E0B\u8F7D\u7684JDK\u6E90\u7801\u8DEF\u5F84\u4E0A\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-129ede68-c368-461e-92d6-38a8e5dee344.png" alt=""></p><p>\u8FD9\u6837\u65B9\u4FBF\u6211\u4EEC\u5BF9\u81EA\u5DF1\u4E0B\u8F7D\u7684<code>JDK\u6E90\u7801</code>\u8FDB\u884C<strong>\u9605\u8BFB</strong>\u3001<strong>\u8C03\u8BD5</strong>\u3001<strong>\u4FEE\u6539</strong>\u3001\u4EE5\u53CA\u5728\u6E90\u7801\u91CC\u968F\u610F<strong>\u505A\u7B14\u8BB0</strong>\u548C<strong>\u52A0\u6CE8\u91CA</strong>\u3002</p><p>\u4E3E\u4E2A\u6700\u7B80\u5355\u7684\u4F8B\u5B50\uFF0C\u6BD4\u5982\u6211\u4EEC\u6253\u5F00<code>System.out.println()</code>\u8FD9\u4E2A\u51FD\u6570\u7684\u5E95\u5C42\u6E90\u7801\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-c406b2a2-208a-4a54-a869-b3f526e93ccd.png" alt=""></p><p>\u6211\u4EEC\u968F\u4FBF\u7ED9\u5B83\u4FEE\u6539\u4E00\u4E0B\uFF0C\u52A0\u4E24\u884C\u7B80\u5355\u7684\u6807\u8BB0\uFF0C\u50CF\u8FD9\u6837\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-2a46b215-04e5-458a-b475-4dc31d7fe326.png" alt=""></p><p>\u4E3A\u4E86\u4F7F\u6211\u4EEC\u65B0\u52A0\u7684\u4EE3\u7801\u884C\u751F\u6548\uFF0C\u6211\u4EEC\u5FC5\u987B\u8981\u91CD\u65B0\u53BBJDK\u6E90\u7801\u7684\u6839\u76EE\u5F55\u4E2D\u518D\u6B21\u6267\u884C\xA0<code>make images</code>\u91CD\u65B0\u7F16\u8BD1\u751F\u6210JDK\u65B9\u53EF\u751F\u6548\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-fd3cf88d-007e-4615-99b5-a3499c35ef40.png" alt=""></p><p>\u56E0\u4E3A\u4E4B\u524D\u5DF2\u7ECF\u5168\u91CF\u7F16\u8BD1\u8FC7\u4E86\uFF0C\u6240\u4EE5\u518D\u6B21<code>make</code>\u7684\u65F6\u5019\u589E\u91CF\u7F16\u8BD1\u4E00\u822C\u5F88\u5FEB\u3002</p><p>\u91CD\u65B0\u7F16\u8BD1\u4E4B\u540E\uFF0C\u6211\u4EEC\u518D\u6B21\u8FD0\u884C<code>JdkTest</code>\u9879\u76EE\uFF0C\u5C31\u53EF\u4EE5\u770B\u5230\u6539\u52A8\u7684\u6548\u679C\u4E86\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-33dc0de6-2690-4ba2-9fe7-0e450c44c07b.png" alt=""></p><hr><h2 id="\u591A\u884C\u6CE8\u91CA\u7684\u95EE\u9898" tabindex="-1"><a class="header-anchor" href="#\u591A\u884C\u6CE8\u91CA\u7684\u95EE\u9898" aria-hidden="true">#</a> \u591A\u884C\u6CE8\u91CA\u7684\u95EE\u9898</h2>',132),b=e("\u8BB0\u5F97\u4E4B\u524D\u642D\u5EFA"),m={href:"https://link.segmentfault.com/?enc=JrtwTM%2BhTi%2B7DiRtBYeZSQ%3D%3D.T2U2BwPhK3iqeNk%2B%2BMuGttrqlD2zy9v1C%2BqYPvIYEvcvkTe1xyPrnnb%2FdaTGkBqY",target:"_blank",rel:"noopener noreferrer"},l=e("\u300AJDK\u6E90\u7801\u9605\u8BFB\u73AF\u5883\u300B"),g=e("\u65F6\uFF0C\u5927\u5BB6\u53EF\u80FD\u53D1\u73B0\u4E86\u4E00\u4E2A\u95EE\u9898\uFF1A\u9605\u8BFB\u6E90\u7801\u561B\uFF0C\u7ED9\u6E90\u4EE3\u7801\u505A\u70B9\u6CE8\u91CA\u6216\u7B14\u8BB0\u5F88\u5E38\u89C1\uFF01\u4F46\u90A3\u65F6\u5019\u6709\u4E2A\u95EE\u9898\u5C31\u662F\u505A\u6CE8\u91CA\u65F6"),h=o("strong",null,"\u4E0D\u53EF\u6539\u53D8\u4EE3\u7801\u7684\u884C\u7ED3\u6784",-1),j=e("\uFF08\u53EA\u80FD\u884C\u5C3E\u6CE8\u91CA\uFF0C\u4E0D\u80FD\u8DE8\u884C\u6CE8\u91CA\uFF09\uFF0C\u5426\u5219debug\u8C03\u8BD5\u65F6\u4F1A\u51FA\u73B0"),v=o("strong",null,"\u884C\u53F7\u9519\u4F4D",-1),J=e("\u7684\u95EE\u9898\u3002"),k=c('<p>\u539F\u56E0\u5F88\u7B80\u5355\uFF0C\u56E0\u4E3A\u6211\u4EEC\u867D\u7136\u505A\u4E86\u6E90\u4EE3\u7801\u76EE\u5F55\u7684\u6620\u5C04\uFF0C\u4F46\u662F\u5B9E\u9645\u652F\u6491\u8FD0\u884C\u7684<code>JDK</code>\u8FD8\u662F\u9884\u5148\u5B89\u88C5\u597D\u7684\u90A3\u4E2AJDK\u73AF\u5883\uFF0C\u5E76\u4E0D\u662F\u6839\u636E\u6211\u4EEC\u4FEE\u6539\u540E\u7684\u6E90\u7801\u6765\u91CD\u65B0\u7F16\u8BD1\u6784\u5EFA\u7684\uFF0C\u6240\u4EE5\u770B\u5230\u8FD9\u91CC\uFF0C\u89E3\u51B3\u8FD9\u4E2A\u95EE\u9898\u5C31\u5F88\u7B80\u5355\uFF0C\u5C31\u50CF\u4E0A\u9762\u4E00\u6837\u81EA\u884C\u7F16\u8BD1\u4E00\u4E0B<code>JDK</code>\u5373\u53EF\u3002</p><p>\u5B9E\u9645\u5728\u5B9E\u9A8C\u65F6\uFF0C\u8FD8\u6709\u4E00\u4E2A\u5F88\u5178\u578B\u7684\u95EE\u9898\u662F\uFF0C\u5F53\u6DFB\u52A0\u4E86\u591A\u884C\u7684\u4E2D\u6587\u6CE8\u91CA\u540E\uFF0C\u518D\u7F16\u8BD1\u5C45\u7136\u4F1A\u62A5\u9519\uFF01</p><p>\u6BD4\u5982\uFF0C\u8FD8\u662F\u4EE5\u4E0A\u9762\u4F8B\u5B50\u4E2D\u6700\u7B80\u5355\u7684<code>System.out.println()</code>\u6E90\u7801\u4E3A\u4F8B\uFF0C\u6211\u4EEC\u6DFB\u52A0\u51E0\u884C\u4E2D\u6587\u6CE8\u91CA\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-d6a44833-b908-4824-8862-1679bfdddfa3.png" alt=""></p><p>\u8FD9\u65F6\u5019\u6211\u4EEC\u53BBJDK\u6E90\u7801\u76EE\u5F55\u4E0B\u7F16\u8BD1\u4F1A\u53D1\u73B0\u6EE1\u5C4F\u7C7B\u4F3C\u8FD9\u6837\u7684\u62A5\u9519\uFF1A</p><blockquote><p>\u9519\u8BEF: \u7F16\u7801 ascii \u7684\u4E0D\u53EF\u6620\u5C04\u5B57\u7B26</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-ad0ca5a3-36c7-477d-bd58-d6731a87d762.png" alt=""></p><p>\u987F\u65F6\u6709\u70B9\u61F5\uFF0C\u6BD5\u7ADF\u4EC5\u4EC5\u662F\u52A0\u4E86\u51E0\u884C\u6CE8\u91CA\u3002\u5BF9\u4E8E\u6211\u4EEC\u6765\u8BF4\uFF0C\u6E90\u7801\u91CC\u5199\u70B9\u591A\u884C\u7684\u4E2D\u6587\u6CE8\u91CA\u57FA\u672C\u662F<strong>\u521A\u9700</strong>\uFF0C\u7136\u800C\u7F16\u8BD1\u7ADF\u4F1A\u62A5\u9519\uFF0C\u8FD9\u8FD8\u80FD\u4E0D\u80FD\u8BA9\u4EBA\u6109\u5FEB\u7684\u73A9\u800D\u4E86... \u5F53\u65F6\u540E\u80CC\u6709\u70B9\u53D1\u51C9\u3002</p><p>\u5B9E\u4E0D\u76F8\u7792\uFF0C\u5C31\u8FD9\u4E2A\u95EE\u9898\u6392\u67E5\u4E86\u4E00\u6BB5\u65F6\u95F4\uFF0C\u71AC\u5230\u4E86\u5F88\u665A\u3002\u6700\u7EC8\u6298\u817E\u4E86\u4E00\u756A\uFF0C\u901A\u8FC7\u5982\u4E0B\u8FD9\u79CD\u65B9\u5F0F\u89E3\u51B3\u4E86\uFF0C\u987A\u4FBF\u5206\u4EAB\u7ED9\u5C0F\u4F19\u4F34\u4EEC\uFF0C\u5927\u5BB6\u5982\u679C\u9047\u5230\u4E86\u8FD9\u4E2A\u95EE\u9898\uFF0C\u53EF\u4EE5\u53C2\u8003\u7740\u89E3\u51B3\u4E00\u4E0B\u3002</p><p>\u56E0\u4E3A\u4ECE\u63A7\u5236\u53F0\u7684\u62A5\u9519\u53EF\u4EE5\u5F88\u660E\u663E\u7684\u770B\u51FA\uFF0C\u80AF\u5B9A\u662F\u5B57\u7B26\u7F16\u7801\u76F8\u5173\u7684\u95EE\u9898\u5BFC\u81F4\u7684\uFF0C\u800C\u4E14\u90FD\u6307\u5411\u4E86<code>ascii</code>\u8FD9\u79CD\u7F16\u7801\u65B9\u5F0F\u3002</p><p>\u4E8E\u662F\u5C06JDK\u7684\u6E90\u7801\u4ECE\u6839\u76EE\u5F55\u5BFC\u5165\u4E86Vs Code\uFF0C\u7136\u540E\u5168\u76EE\u5F55\u67E5\u627E<code>encoding ascii</code>\u76F8\u5173\u7684\u5185\u5BB9\uFF0C\u770B\u770B\u6709\u6CA1\u6709\u4EC0\u4E48\u7AEF\u502A\uFF0C\u7ED3\u679C\u53D1\u73B0</p><p><code>jdk\u6E90\u7801\u6839\u76EE\u5F55/make/common/SetupJavaCompilers.gmk</code>\u6587\u4EF6\u4E2D\u6709\u4E24\u5904\u6307\u5B9A\u4E86<code>ascii</code>\u76F8\u5173\u7684\u7F16\u7801\u65B9\u5F0F\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-a86933af-f6d5-4d45-b4ca-33069a212c52.png" alt=""></p><p>\u4E8E\u662F\u5C1D\u8BD5\u5C06\u8FD9\u4E24\u5904<code>-encoding ascii</code>\u7684\u5747\u66FF\u6362\u6210<code>-encoding utf-8</code>\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-c8117faf-d027-48d3-869b-32d0e98e8372.png" alt=""></p><p>\u7136\u540E\u518D\u6B21\u6267\u884C<code>make images</code>\u7F16\u8BD1\uFF0C\u7F16\u8BD1\u987A\u5229\u901A\u8FC7\uFF01</p><p>\u81F3\u6B64\u5927\u529F\u544A\u6210\uFF01</p><p>\u8FD9\u6837\u540E\u9762\u4E0D\u7BA1\u662F<strong>\u9605\u8BFB</strong>\u3001<strong>\u8C03\u8BD5</strong>\u8FD8\u662F<strong>\u5B9A\u5236</strong><code>JDK</code>\u6E90\u7801\u90FD\u975E\u5E38\u65B9\u4FBF\u4E86\u3002</p><hr><p>\u5F15\u7528\u94FE\u63A5\uFF1Ahttps://segmentfault.com/a/1190000023251649</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p>',21);function D(f,u){const d=t("ExternalLinkIcon");return r(),p("div",null,[s,o("p",null,[b,o("a",m,[l,i(d)]),g,h,j,v,J]),k])}var x=a(n,[["render",D],["__file","compile-jdk.html.vue"]]);export{x as default};
+import{_ as a}from"./plugin-vue_export-helper.21dcd24c.js";import{r as t,o as r,c as p,a as o,b as i,e as c,d as e}from"./app.615e41d8.js";const n={},s=c('<h1 id="\u81EA\u5DF1\u7F16\u8BD1jdk" tabindex="-1"><a class="header-anchor" href="#\u81EA\u5DF1\u7F16\u8BD1jdk" aria-hidden="true">#</a> \u81EA\u5DF1\u7F16\u8BD1JDK</h1><p>\u5F15\u7528\u94FE\u63A5\uFF1Ahttps://segmentfault.com/a/1190000023251649</p><p>\u5F88\u591A\u5C0F\u4F19\u4F34\u4EEC\u505A<code>Java</code>\u5F00\u53D1\uFF0C\u5929\u5929\u5199<code>Java</code>\u4EE3\u7801\uFF0C\u80AF\u5B9A\u79BB\u4E0D\u5F00<code>Java</code>\u57FA\u7840\u73AF\u5883\uFF1A<code>JDK</code>\uFF0C\u6BD5\u7ADF\u6211\u4EEC\u5199\u597D\u7684<code>Java</code>\u4EE3\u7801\u4E5F\u662F\u8DD1\u5728<code>JVM</code>\u865A\u62DF\u673A\u4E0A\u3002</p><p>\u4E00\u822C\u6765\u8BF4\uFF0C\u6211\u4EEC\u5B66<code>Java</code>\u4E4B\u524D\uFF0C\u7B2C\u4E00\u6B65\u5C31\u662F\u5B89\u88C5<code>JDK</code>\u73AF\u5883\u3002\u8FD9\u4E2A\u7B80\u5355\u554A\uFF0C\u6211\u4EEC\u4E00\u822C\u76F4\u63A5\u628A<code>JDK</code>\u4ECE\u5B98\u7F51\u4E0B\u8F7D\u4E0B\u6765\uFF0C\u5B89\u88C5\u5B8C\u6210\uFF0C\u914D\u4E2A\u73AF\u5883\u53D8\u91CF\u5C31\u53EF\u4EE5\u6109\u5FEB\u5730\u4F7F\u7528\u4E86\u3002</p><p>\u4E0D\u8FC7\u8BDD\u8BF4\u56DE\u6765\uFF0C\u5BF9\u4E8E\u8FD9\u4E2A\u5929\u5929\u4F7F\u7528\u7684\u4E1C\u897F\uFF0C\u6211\u4EEC\u96BE\u9053\u4E0D\u597D\u5947\u8FD9\u73A9\u610F\u513F\u5B83\u5230\u5E95\u662F\u600E\u4E48\u7531\u6E90\u7801\u7F16\u8BD1\u51FA\u6765\u7684\u5417\uFF1F</p><p>\u5E26\u7740\u8FD9\u4E2A\u539F\u59CB\u7684\u7591\u95EE\uFF0C\u4ECA\u5929\u51C6\u5907\u5927\u5E72\u4E00\u573A\uFF0C\u81EA\u5DF1\u52A8\u52A8\u5446\u840C\u7684\u5C0F\u624B\uFF0C\u6765\u7F16\u8BD1\u4E00\u4E2A\u5C5E\u4E8E\u81EA\u5DF1\u7684<code>JDK</code>\u5427\uFF01</p><h2 id="\u73AF\u5883\u51C6\u5907" tabindex="-1"><a class="header-anchor" href="#\u73AF\u5883\u51C6\u5907" aria-hidden="true">#</a> \u73AF\u5883\u51C6\u5907</h2><blockquote><p>\u9996\u9009\u8BF4\u5728\u524D\u9762\u7684\u662F\uFF0C\u7F16\u8BD1\u524D\u7684\u8F6F\u4EF6\u7248\u672C\u5173\u7CFB\u6781\u5176\u91CD\u8981\uFF0C\u81EA\u5DF1\u5728\u8E29\u5751\u65F6\uFF0C\u6240\u51FA\u73B0\u7684\u5404\u79CD\u5947\u5947\u602A\u602A\u7684\u95EE\u9898\u51E0\u4E4E\u90FD\u548C\u8FD9\u4E2A\u6709\u5173\uFF0C\u540E\u6765\u7248\u672C\u5339\u914D\u4E4B\u540E\uFF0C\u5C31\u975E\u5E38\u987A\u5229\u4E86\u3002</p></blockquote><p>\u6211\u4EEC\u6765<strong>\u76D8\u70B9\u548C\u68B3\u7406</strong>\u4E00\u4E0B\u7F16\u8BD1\u4E00\u4E2AJDK\u9700\u8981\u54EA\u4E9B\u73AF\u5883\u548C\u5DE5\u5177\uFF1A</p><h3 id="_1\u3001boot-jdk" tabindex="-1"><a class="header-anchor" href="#_1\u3001boot-jdk" aria-hidden="true">#</a> <strong>1\u3001boot JDK</strong></h3><p>\u6211\u4EEC\u8981\u60F3\u7F16\u8BD1<code>JDK</code>\uFF0C\u9996\u5148\u81EA\u5DF1\u672C\u673A\u5FC5\u987B\u63D0\u524D\u5DF2\u7ECF\u5B89\u88C5\u6709\u4E00\u4E2A<code>JDK</code>\uFF0C\u5B98\u65B9\u79F0\u4E4B\u4E3A<code>bootstrap JDK</code>\uFF08\u6216\u8005\u79F0\u4E3A<code>boot JDK</code>\uFF09\u3002</p><p>\u6BD4\u5982\u60F3\u7F16\u8BD1<code>JDK 8</code>\uFF0C\u90A3\u672C\u673A\u5FC5\u987B\u6700\u8D77\u7801\u5F97\u6709\u4E00\u4E2A<code>JDK 7</code>\u6216\u8005\u66F4\u65B0\u4E00\u70B9\u7684\u7248\u672C\uFF1B\u4F60\u60F3\u7F16\u8BD1<code>JDK 11</code>\uFF0C\u90A3\u5C31\u8981\u6C42\u672C\u673A\u5FC5\u987B\u88C5\u6709<code>JDK 10</code>\u6216\u8005<code>11</code>\u3002</p><blockquote><p>\u6240\u4EE5\u9E21\u751F\u86CB\u3001\u86CB\u751F\u9E21\u53C8\u6765\u4E86...</p></blockquote><h3 id="_2\u3001unix\u73AF\u5883" tabindex="-1"><a class="header-anchor" href="#_2\u3001unix\u73AF\u5883" aria-hidden="true">#</a> <strong>2\u3001Unix\u73AF\u5883</strong></h3><p>\u7F16\u8BD1<code>JDK</code>\u9700\u8981<code>Unix</code>\u73AF\u5883\u7684\u652F\u6301\uFF01</p><p>\u8FD9\u4E00\u70B9\u5728<code>Linux</code>\u64CD\u4F5C\u7CFB\u7EDF\u548C<code>macOS</code>\u64CD\u4F5C\u7CFB\u7EDF\u4E0A\u5DF2\u7ECF\u5929\u7136\u7684\u4FDD\u8BC1\u4E86\uFF0C\u800C\u5BF9\u4E8E<code>Windows</code>\u5144\u5F1F\u6765\u8BF4\u7A0D\u5FAE\u9EBB\u70E6\u4E00\u70B9\uFF0C\u9700\u8981\u901A\u8FC7\u4F7F\u7528<code>Cygwin</code>\u6216\u8005<code>MinGW/MSYS</code>\u8FD9\u79CD\u8F6F\u4EF6\u6765\u6A21\u62DF\u3002</p><p>\u5C31\u50CF\u5B98\u65B9\u6240\u8BF4\uFF1A\u5728<code>Linux</code>\u5E73\u53F0\u7F16\u8BD1<code>JDK</code>\u4E00\u822C\u95EE\u9898\u6700\u5C11\uFF0C\u5BB9\u6613\u6210\u529F\uFF1B<code>macOS</code>\u6B21\u4E4B\uFF1B<code>Windows</code>\u4E0A\u5219\u9700\u8981\u7A0D\u5FAE\u591A\u82B1\u70B9\u7CBE\u529B\uFF0C\u95EE\u9898\u53EF\u80FD\u4E5F\u591A\u4E00\u4E9B\u3002</p><p>\u7A76\u5176\u672C\u8D28\u539F\u56E0\uFF0C\u8FD8\u662F\u56E0\u4E3A<code>Windows</code>\u6BD5\u7ADF\u4E0D\u662F\u4E00\u4E2A<code>Unix-Like</code>\u5185\u6838\u7684\u7CFB\u7EDF\uFF0C\u6BD5\u7ADF\u5F88\u591A\u8F6F\u4EF6\u7684\u539F\u59CB\u7F16\u8BD1\u90FD\u79BB\u4E0D\u5F00<code>Unix Toolkit</code>\uFF0C\u6240\u4EE5\u76F8\u5BF9\u80AF\u5B9A\u8981\u9EBB\u70E6\u4E00\u4E9B\u3002</p><h3 id="_3\u3001\u7F16\u8BD1\u5668-\u7F16\u8BD1\u5DE5\u5177\u94FE" tabindex="-1"><a class="header-anchor" href="#_3\u3001\u7F16\u8BD1\u5668-\u7F16\u8BD1\u5DE5\u5177\u94FE" aria-hidden="true">#</a> <strong>3\u3001\u7F16\u8BD1\u5668/\u7F16\u8BD1\u5DE5\u5177\u94FE</strong></h3><p><code>JDK</code>\u5E95\u5C42\u6E90\u7801\uFF08\u5C24\u5176<code>JVM</code>\u865A\u62DF\u673A\u90E8\u5206\uFF09\u5F88\u591A\u90FD\u662F<code>C++/C</code>\u5199\u7684\uFF0C\u6240\u4EE5\u76F8\u5173\u7F16\u8BD1\u5668\u4E5F\u8DD1\u4E0D\u6389\u3002</p><p>\u4E00\u56FE\u80DC\u5343\u8A00\uFF0C\u5404\u5E73\u53F0\u4E0A\u7684\u7F16\u8BD1\u5668\u652F\u6301\u5982\u4E0B\u8868\u6240\u793A\uFF0C\u6309\u5E73\u53F0\u9009\u62E9\u5373\u53EF\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-3b66d5b6-272f-47bd-88f7-47146a06ef06.png" alt=""></p><h3 id="_4\u3001\u5176\u4ED6\u5DE5\u5177" tabindex="-1"><a class="header-anchor" href="#_4\u3001\u5176\u4ED6\u5DE5\u5177" aria-hidden="true">#</a> <strong>4\u3001\u5176\u4ED6\u5DE5\u5177</strong></h3><p>\u5178\u578B\u7684\u6BD4\u5982\uFF1A</p><ul><li><code>Autoconf</code>\uFF1A\u8F6F\u4EF6\u6E90\u7801\u5305\u7684\u81EA\u52A8\u914D\u7F6E\u5DE5\u5177</li><li><code>Make</code>\uFF1A\u7F16\u8BD1\u6784\u5EFA\u5DE5\u5177</li><li><code>freetype</code>\uFF1A\u4E00\u4E2A\u514D\u8D39\u7684\u6E32\u67D3\u5E93\uFF0C<code>JDK</code>\u56FE\u5F62\u5316\u90E8\u5206\u7684\u4EE3\u7801\u53EF\u80FD\u4F1A\u7528\u5B83</li></ul><p>\u597D\uFF0C\u73AF\u5883\u76D8\u70B9\u5C31\u5230\u8FD9\u91CC\uFF0C\u63A5\u4E0B\u6765\u5177\u4F53\u5217\u4E00\u4E0B\u6211\u5728\u7F16\u8BD1<code>JDK 8</code>\u548C<code>JDK 11</code>\u65F6\u5206\u522B\u7528\u5230\u7684\u8F6F\u4EF6\u8BE6\u7EC6\u7248\u672C\u4FE1\u606F\uFF1A</p><p><strong>\u7F16\u8BD1JDK 8\u65F6\uFF1A</strong></p><ul><li><code>\u64CD\u4F5C\u7CFB\u7EDF</code>\uFF1AmacOS 10.11.6</li><li><code>boot JDK</code>\uFF1AJDK 1.8.0 (build 1.8.0_201-b09)</li><li><code>Xcode\u7248\u672C</code>\uFF1A8.2</li><li><code>\u7F16\u8BD1\u5668</code>\uFF1AVersion 8.0.0 (at /usr/bin/clang)</li></ul><p><strong>\u7F16\u8BD1JDK 11\u65F6\uFF1A</strong></p><ul><li><code>\u64CD\u4F5C\u7CFB\u7EDF</code>\uFF1AmacOS 10.15.4</li><li><code>boot JDK</code>\uFF1AJDK 11.0.7 (build 11.0.7+8-LTS)</li><li><code>Xcode\u7248\u672C</code>\uFF1A11.5</li><li><code>\u7F16\u8BD1\u5668</code>\uFF1AVersion 11.0.3 (at /usr/bin/clang)</li></ul><p>\u5927\u5BB6\u5728\u7F16\u8BD1\u65F6\u5982\u679C\u8FC7\u7A0B\u4E2D\u6709\u5F88\u591A\u95EE\u9898\uFF0C\u5927\u6982\u7387\u5C11\u8F6F\u4EF6\u6CA1\u88C5\uFF0C\u6216\u8005\u8F6F\u4EF6\u7248\u672C\u4E0D\u5339\u914D\uFF0C\u4E0D\u8981\u8F7B\u6613\u653E\u5F03\uFF0C\u9700\u8981\u8010\u5FC3\u81EA\u67E5\u4E00\u4E0B\u3002</p><hr><h2 id="\u4E0B\u8F7Djdk\u6E90\u7801" tabindex="-1"><a class="header-anchor" href="#\u4E0B\u8F7Djdk\u6E90\u7801" aria-hidden="true">#</a> \u4E0B\u8F7DJDK\u6E90\u7801</h2><p>\u4E0B\u8F7D<code>JDK</code>\u6E90\u7801\u5176\u5B9E\u6709\u4E24\u79CD\u65B9\u5F0F\u3002</p><h3 id="\u65B9\u5F0F\u4E00-\u901A\u8FC7mercurial\u5DE5\u5177\u4E0B\u8F7D" tabindex="-1"><a class="header-anchor" href="#\u65B9\u5F0F\u4E00-\u901A\u8FC7mercurial\u5DE5\u5177\u4E0B\u8F7D" aria-hidden="true">#</a> <strong>\u65B9\u5F0F\u4E00\uFF1A\u901A\u8FC7Mercurial\u5DE5\u5177\u4E0B\u8F7D</strong></h3><p><code>Mercurial</code>\u53EF\u4EE5\u7406\u89E3\u4E3A\u548C<code>Git</code>\u4E00\u6837\uFF0C\u662F\u53E6\u5916\u4E00\u79CD\u4EE3\u7801\u7BA1\u7406\u5DE5\u5177\uFF0C\u5B89\u88C5\u597D\u4E4B\u540E\u5C31\u6709\u4E00\u4E2A<code>hg</code>\u547D\u4EE4\u53EF\u7528\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-cd8a19ba-e9f5-4a4a-a23c-17688f0f459d.png" alt=""></p><p>\u800C<code>OpenJDK</code>\u7684\u6E90\u7801\u5DF2\u7ECF\u63D0\u524D\u6258\u7BA1\u5230<code>http://hg.openjdk.java.net/</code>\u3002</p><p>\u56E0\u6B64\uFF0C\u6BD4\u5982\u4E0B\u8F7D<code>JDK 8</code>\uFF0C\u53EF\u76F4\u63A5<code>hg clone</code>\u4E00\u4E0B\u5C31\u884C\uFF0C\u548C<code>git clone</code>\u4E00\u6837\uFF1A</p><p><code>hg\xA0clone\xA0[http://hg.openjdk.java.net/jd...](https://link.segmentfault.com/?enc=Snt8gNbYV7nkV3etTe%2FGJw%3D%3D.7IrUNCuc0HOEyvjCiCBOPMEBJ09bjLifieJi0I7iwtuuIeYUdSfCkC9c4D7z9wdq) </code></p><p>\u540C\u7406\uFF0C\u4E0B\u8F7D<code>JDK 11</code>\uFF1A</p><p><code>hg\xA0clone\xA0[http://hg.openjdk.java.net/jd...](https://link.segmentfault.com/?enc=BnHqAYXzfRcVfPgGgo1yOw%3D%3D.011np6%2FiCLuojl%2FBtvROkTVXr0PSdMYcYpAg2WUIE045BEFIrbCNAD42vWwIUb3d) </code></p><p>\u4F46\u662F\u8FD9\u79CD\u65B9\u5F0F\u4E0B\u8F7D\u901F\u5EA6\u4E0D\u662F\u5F88\u5FEB\u3002</p><h3 id="\u65B9\u5F0F\u4E8C-\u76F4\u63A5\u4E0B\u8F7D\u6253\u5305\u597D\u7684\u6E90\u7801\u5305" tabindex="-1"><a class="header-anchor" href="#\u65B9\u5F0F\u4E8C-\u76F4\u63A5\u4E0B\u8F7D\u6253\u5305\u597D\u7684\u6E90\u7801\u5305" aria-hidden="true">#</a> <strong>\u65B9\u5F0F\u4E8C\uFF1A\u76F4\u63A5\u4E0B\u8F7D\u6253\u5305\u597D\u7684\u6E90\u7801\u5305</strong></h3><p>\u4E0B\u8F7D\u5730\u5740\uFF1A<code>https://jdk.java.net/</code></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-1bbbb1f8-da01-46e1-a793-487a25193c68.png" alt=""></p><p>\u9009\u62E9\u4F60\u60F3\u8981\u7684\u7248\u672C\u4E0B\u8F7D\u5373\u53EF\u3002</p><hr><h3 id="\u7F16\u8BD1\u524D\u7684\u81EA\u52A8\u914D\u7F6E" tabindex="-1"><a class="header-anchor" href="#\u7F16\u8BD1\u524D\u7684\u81EA\u52A8\u914D\u7F6E" aria-hidden="true">#</a> \u7F16\u8BD1\u524D\u7684\u81EA\u52A8\u914D\u7F6E</h3><p>\u6E90\u7801\u5305\u4E0B\u8F7D\u597D\uFF0C\u653E\u5230\u672C\u5730\u67D0\u4E2A\u76EE\u5F55\uFF08\u5EFA\u8BAE\u8DEF\u5F84\u7EAF\u82F1\u6587\uFF0C\u907F\u514D\u4E0D\u5FC5\u8981\u7684\u9EBB\u70E6\uFF09\uFF0C\u89E3\u538B\u4E4B\uFF0C\u7136\u540E\u8FDB\u5165\u6E90\u7801\u6839\u76EE\u5F55\uFF0C\u6267\u884C\uFF1A</p><p><code>sh\xA0configure </code></p><blockquote><p>\u5F53\u7136\u8FD9\u91CC\u8FD0\u884C\u7684\u662F\u9ED8\u8BA4\u914D\u7F6E\u9879\u3002</p></blockquote><p>\u8FD9\u4E00\u6B65\u4F1A\u8FDB\u884C\u4E00\u7CFB\u5217\u7684\u81EA\u52A8\u914D\u7F6E\u5DE5\u4F5C\uFF0C\u65F6\u95F4\u4E00\u822C\u5F88\u5FEB\uFF0C\u6700\u7EC8\u5982\u679C\u80FD\u51FA\u73B0\u4E00\u4E0B\u63D0\u793A\uFF0C\u90A3\u4E48\u5F88\u5E78\u8FD0\uFF0C\u7F16\u8BD1\u524D\u7684\u914D\u7F6E\u5DE5\u4F5C\u5C31\u5B8C\u6210\u4E86\uFF01</p><p>\u8FD9\u91CC\u6211\u7ED9\u51FA\u6211\u81EA\u5DF1\u5206\u522B\u5728\u914D\u7F6E<code>JDK 11</code>\u548C<code>JDK 8</code>\u65F6\u5019\u5B8C\u6210\u65F6\u7684\u6837\u5B50\uFF1A</p><p><strong>\u914D\u7F6EJDK 8\u5B8C\u6210\uFF1A</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-27593edc-03e2-4a42-baf3-ed5e5096b3cb.png" alt=""></p><p><strong>\u914D\u7F6EJDK 11\u5B8C\u6210\uFF1A</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-8526d944-a36e-4d37-93a0-9ad4ad53f927.png" alt=""></p><p><strong>\u6CE8\uFF1A</strong>\xA0\u5982\u679C\u8FD9\u4E00\u6B65\u51FA\u9519\uFF0C\u5927\u6982\u7387\u662F\u67D0\u4E2A\u8F6F\u4EF6\u73AF\u5883\u672A\u88C5\uFF0C\u6216\u8005\u5373\u4F7F\u88C5\u4E86\uFF0C\u4F46\u7248\u672C\u4E0D\u5339\u914D\uFF0C\u63A7\u5236\u53F0\u6253\u5370\u65E5\u5FD7\u91CC\u4E00\u822C\u662F\u4F1A\u63D0\u9192\u7684\u3002</p><p>\u6BD4\u5982\u6211\u5728\u914D\u7F6E<code>JDK 8</code>\u7684\u65F6\u5019\uFF0C\u5C31\u9047\u5230\u4E86\u4E00\u4E2A<code>errof\uFF1AGCC compiler is required</code>\u7684\u95EE\u9898\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-2957399f-6451-46dc-a003-76e5159265e9.png" alt=""></p><p>\u660E\u660E\u7CFB\u7EDF\u91CC\u5DF2\u7ECF\u6709\u7F16\u8BD1\u5668\uFF0C\u4F46\u8FD8\u662F\u62A5\u8FD9\u4E2A\u9519\u8BEF\u3002\u901A\u8FC7\u540E\u6765\u4FEE\u6539\xA0<code>jdk\u6E90\u7801\u6839\u76EE\u5F55/common/autoconf/generated-configure.sh</code>\u6587\u4EF6\uFF0C\u5C06\u76F8\u5173\u7684\u4E24\u884C\u4EE3\u7801\u6CE8\u91CA\u540E\u5C31\u914D\u7F6E\u901A\u8FC7\u4E86</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-ffa10d36-3a77-48aa-ae0c-d3daf67f9a19.png" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-a6f6e416-639e-4706-8b40-6152eb3cf85d.png" alt=""></p><p>\u914D\u7F6E\u5B8C\u6210\uFF0C\u63A5\u4E0B\u6765\u5F00\u59CB\u6267\u884C\u771F\u6B63\u7684\u7F16\u8BD1\u52A8\u4F5C\u4E86\uFF01</p><hr><h2 id="\u771F\u6B63\u7684\u7F16\u8BD1\u52A8\u4F5C" tabindex="-1"><a class="header-anchor" href="#\u771F\u6B63\u7684\u7F16\u8BD1\u52A8\u4F5C" aria-hidden="true">#</a> \u771F\u6B63\u7684\u7F16\u8BD1\u52A8\u4F5C</h2><p>\u6211\u4EEC\u8FD9\u91CC\u8FDB\u884C\u7684\u662F\u5168\u91CF\u7F16\u8BD1\uFF0C\u76F4\u63A5\u5728\u6211\u4EEC\u4E0B\u8F7D\u7684<code>JDK</code>\u6E90\u7801\u6839\u76EE\u5F55\u4E0B\u6267\u884C\u5982\u4E0B\u547D\u4EE4\u5373\u53EF\uFF1A</p><p><code>make\xA0all </code></p><p>\u8FD9\u4E00\u6B65\u7F16\u8BD1\u9700\u8981\u4E00\u70B9\u65F6\u95F4\uFF0C\u8010\u5FC3\u7B49\u5F85\u4E00\u4E0B\u5373\u53EF\u3002\u7F16\u8BD1\u8FC7\u7A0B\u5982\u679C\u6709\u9519\u8BEF\uFF0C\u4F1A\u7EC8\u6B62\u7F16\u8BD1\uFF0C\u5982\u679C\u80FD\u770B\u5230\u5982\u4E0B\u4E24\u4E2A\u753B\u9762\uFF0C\u90A3\u4E48\u5219\u606D\u559C\u4F60\uFF0C\u81EA\u5DF1\u7F16\u8BD1<code>JDK</code>\u6E90\u7801\u5C31\u5DF2\u7ECF\u901A\u8FC7\u4E86\uFF0C\u53EF\u4EE5\u641E\u4E00\u676F\u5496\u5561\u5E86\u795D\u4E00\u4E0B\u4E86\u3002</p><p><strong>JDK 8\u7F16\u8BD1\u5B8C\u6210\uFF1A</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-89020f5a-0909-4c57-8c88-f655293a42a4.png" alt=""></p><p><strong>JDK 11\u7F16\u8BD1\u5B8C\u6210\uFF1A</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-993fac94-2473-4f3b-9737-959510d2fe98.png" alt=""></p><p>\u4ECE\u4E24\u5F20\u56FE\u7684\u5BF9\u6BD4\u53EF\u4EE5\u770B\u51FA\uFF0C\u7F16\u8BD1<code>JDK 8</code>\u548C<code>JDK 11</code>\u5B8C\u6210\u65F6\u5728\u8F93\u51FA\u4E0A\u8FD8\u662F\u6709\u533A\u522B\u7684\u3002\u65F6\u95F4\u4E0A\u7684\u533A\u522B\u5F88\u5927\u7A0B\u5EA6\u4E0A\u6765\u6E90\u4E8E<code>JDK 11</code>\u7684\u7F16\u8BD1\u673A\u914D\u7F6E\u8981\u9AD8\u4E0D\u5C11\u3002</p><hr><h2 id="\u9A8C\u8BC1\u6210\u679C" tabindex="-1"><a class="header-anchor" href="#\u9A8C\u8BC1\u6210\u679C" aria-hidden="true">#</a> \u9A8C\u8BC1\u6210\u679C</h2><p><code>JDK</code>\u6E90\u7801\u7F16\u8BD1\u5B8C\u6210\u4E4B\u540E\u80AF\u5B9A\u4F1A\u4EA7\u751F\u548C\u8F93\u51FA\u5F88\u591A\u4EA7\u7269\uFF0C\u8FD9\u4E5F\u662F\u6211\u4EEC\u6240\u8FEB\u4E0D\u53CA\u5F85\u60F3\u770B\u5230\u7684\u3002</p><p>\u7531\u4E8E<code>JDK 8</code>\u548C<code>JDK 11</code>\u7684\u6E90\u7801\u5305\u7EC4\u7EC7\u7ED3\u6784\u5E76\u4E0D\u4E00\u6837\uFF0C\u6240\u4EE5\u8F93\u51FA\u4E1C\u897F\u7684\u5185\u5BB9\u548C\u4F4D\u7F6E\u4E5F\u6709\u533A\u522B\u3002\u6211\u4EEC\u4E00\u4E00\u6765\u76D8\u70B9\u4E00\u4E0B\u3002</p><h3 id="_1\u3001jdk-8\u7684\u7F16\u8BD1\u8F93\u51FA" tabindex="-1"><a class="header-anchor" href="#_1\u3001jdk-8\u7684\u7F16\u8BD1\u8F93\u51FA" aria-hidden="true">#</a> <strong>1\u3001JDK 8\u7684\u7F16\u8BD1\u8F93\u51FA</strong></h3><p>\u7F16\u8BD1\u5B8C\u6210\uFF0C<code>build</code>\u76EE\u5F55\u4E0B\u4F1A\u751F\u6210\u4E00\u4E2A<code>macosx-x86_64-normal-server-release</code>\u76EE\u5F55\uFF0C\u6240\u6709\u7684\u7F16\u8BD1\u6210\u679C\u5747\u4F4D\u4E8E\u5176\u4E2D\u3002</p><p>\u9996\u5148\uFF0C\u7F16\u8BD1\u51FA\u6765\u7684<code>Java</code>\u53EF\u6267\u884C\u7A0B\u5E8F\u53EF\u4EE5\u5728\u5982\u4E0B\u76EE\u5F55\u91CC\u627E\u5230\uFF1A</p><p><code>jdk\u6E90\u7801\u6839\u76EE\u5F55/build/macosx-x86_64-normal-server-release/jdk/bin</code></p><p>\u8FDB\u5165\u8BE5\u76EE\u5F55\u540E\uFF0C\u53EF\u4EE5\u8F93\u5165<code>./java -version</code>\u547D\u4EE4\u9A8C\u8BC1\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-f02dff40-f27e-476c-998b-bd6cdb5d3559.png" alt=""></p><p>\u5176\u6B21\uFF0C\u7F16\u8BD1\u751F\u6210\u7684\u6210\u54C1<code>JDK</code>\u5957\u88C5\uFF0C\u53EF\u4EE5\u5728\u76EE\u5F55</p><p><code>jdk\u6E90\u7801\u6839\u76EE\u5F55/build/macosx-x86_64-normal-server-release/images </code></p><p>\u4E0B\u627E\u5230\uFF0C\u5982\u56FE\u6240\u793A\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-1c781d34-776e-4acc-8d2b-b34bc59fda61.png" alt=""></p><p>\u5176\u4E2D\uFF1A</p><ul><li><code>j2sdk-image</code>\uFF1A\u7F16\u8BD1\u751F\u6210\u7684JDK</li><li><code>j2re-image</code>\uFF1A\u7F16\u8BD1\u751F\u6210\u7684JRE</li></ul><p>\u8FDB\u5165<code>j2sdk-image</code>\u76EE\u5F55\u4F1A\u53D1\u73B0\uFF0C\u91CC\u9762\u7684\u5185\u5BB9\u548C\u6211\u4EEC\u5E73\u65F6\u4ECE\u7F51\u7EDC\u4E0A\u4E0B\u8F7D\u7684\u6210\u54C1<code>JDK</code>\u5185\u5BB9\u4E00\u81F4\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-7b7f147e-58c9-4eb5-b407-b8984cd72e1d.png" alt=""></p><h3 id="_2\u3001jdk-11\u7684\u7F16\u8BD1\u8F93\u51FA" tabindex="-1"><a class="header-anchor" href="#_2\u3001jdk-11\u7684\u7F16\u8BD1\u8F93\u51FA" aria-hidden="true">#</a> <strong>2\u3001JDK 11\u7684\u7F16\u8BD1\u8F93\u51FA</strong></h3><blockquote><p>JDK 11\u7684\u6E90\u7801\u76EE\u5F55\u7EC4\u7EC7\u65B9\u5F0F\u548CJDK 8\u672C\u8EAB\u5C31\u6709\u533A\u522B\uFF0C\u7F16\u8BD1\u751F\u6210\u7684\u4EA7\u7269\u548C\u4E0A\u9762\u7F16\u8BD1JDK 8\u7684\u8F93\u51FA\u6709\u4E00\u5B9A\u533A\u522B\uFF0C\u4F46\u4E5F\u4E0D\u5927\u3002</p></blockquote><p><code>JDK 11</code>\u7F16\u8BD1\u5B8C\u6210\uFF0C\u540C\u6837\u5728<code>build</code>\u76EE\u5F55\u4E0B\u4F1A\u751F\u6210\u4E00\u4E2A<code>macosx-x86_64-normal-server-release</code>\u76EE\u5F55\uFF0C\u6240\u6709\u7684\u7F16\u8BD1\u6210\u679C\u5747\u4F4D\u4E8E\u5176\u4E2D\u3002</p><p>\u540C\u6837\u7F16\u8BD1\u51FA\u6765\u7684Java\u53EF\u6267\u884C\u7A0B\u5E8F\u53EF\u4EE5\u5728\u76EE\u5F55</p><p><code>JDK\u6E90\u7801\u6839\u76EE\u5F55/build/macosx-x86_64-normal-server-release/jdk/bin</code></p><p>\u4E0B\u770B\u5230\uFF0C\u8FDB\u5165\u8BE5\u76EE\u5F55\u540E\uFF0C\u4E5F\u53EF\u4EE5\u8F93\u5165<code>./java -version</code>\u547D\u4EE4\u9A8C\u8BC1\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-f9b55425-f308-44e8-8812-ac59b2707c81.png" alt=""></p><p>\u5176\u6B21\uFF0C\u7F16\u8BD1\u751F\u6210\u7684\u6210\u54C1<code>JDK 11</code>\u5957\u88C5\uFF0C\u53EF\u4EE5\u5728\u76EE\u5F55</p><p><code>JDK\u6E90\u7801\u6839\u76EE\u5F55/build/macosx-x86_64-normal-server-release/images </code></p><p>\u4E0B\u627E\u5230\uFF0C\u5982\u56FE\u6240\u793A\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-4e96858f-f681-4498-b1c4-282d317a6a32.png" alt=""></p><p>\u5176\u4E2D<code>jdk</code>\u76EE\u5F55\u5C31\u662F\u7F16\u8BD1\u751F\u6210\u7684\u6210\u54C1<code>JDK 11</code>\u5957\u88C5\u3002</p><hr><h2 id="\u4F7F\u7528\u81EA\u5DF1\u7F16\u8BD1\u7684jdk" tabindex="-1"><a class="header-anchor" href="#\u4F7F\u7528\u81EA\u5DF1\u7F16\u8BD1\u7684jdk" aria-hidden="true">#</a> \u4F7F\u7528\u81EA\u5DF1\u7F16\u8BD1\u7684JDK</h2><p>\u65E2\u7136\u6211\u4EEC\u5DF2\u7ECF\u52A8\u624B\u7F16\u8BD1\u51FA\u4E86<code>JDK</code>\u6210\u54C1\uFF0C\u63A5\u4E0B\u6765\u6211\u4EEC\u5F97\u7528\u4E0A\u54C7\u3002</p><p>\u65B0\u5EFA\u4E00\u4E2A\u6700\u6700\u57FA\u672C\u7684<code>Java</code>\u5DE5\u7A0B\uFF0C\u6BD4\u5982\u547D\u540D\u4E3A<code>JdkTest</code>\uFF0C\u76EE\u7684\u662F\u628A\u6211\u4EEC\u81EA\u5DF1\u7F16\u8BD1\u51FA\u7684<code>JDK</code>\u7ED9\u7528\u4E0A\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-2cf54b29-9b7e-46b2-8cde-4c36960aa09b.png" alt=""></p><p>\u6211\u4EEC\u70B9\u5F00<code>Project Structure</code>\uFF0C\u9009\u5230<code>SDKs</code>\u9009\u9879\uFF0C\u65B0\u6DFB\u52A0\u4E0A\u81EA\u5DF1\u521A\u521A\u7F16\u8BD1\u751F\u6210\u7684JDK\uFF0C\u5E76\u9009\u4E3A\u9879\u76EE\u7684JDK\uFF0C\u770B\u770B\u662F\u5426\u80FD\u6B63\u5E38\u5DE5\u4F5C</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-ad8023d0-fbb7-48b1-856e-a8818677a0a5.png" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-b8d87f09-6178-44c7-9572-a2852e81318d.png" alt=""></p><p>\u70B9\u51FB\u786E\u5B9A\u4E4B\u540E\uFF0C\u6211\u4EEC\u8FD0\u884C\u4E4B\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-3164cf31-8078-46d7-bee0-22e05b0c08de.png" alt=""></p><p>\u53EF\u4EE5\u770B\u5230\u6211\u4EEC\u81EA\u5DF1\u7F16\u8BD1\u51FA\u7684JDK\u5DF2\u7ECF\u7528\u4E0A\u4E86\u3002</p><hr><h2 id="\u5173\u8054jdk\u6E90\u7801\u5E76\u4FEE\u6539" tabindex="-1"><a class="header-anchor" href="#\u5173\u8054jdk\u6E90\u7801\u5E76\u4FEE\u6539" aria-hidden="true">#</a> \u5173\u8054JDK\u6E90\u7801\u5E76\u4FEE\u6539</h2><p>\u6211\u4EEC\u7EE7\u7EED\u5728\u4E0A\u4E00\u6B65<code>JdkTest</code>\u9879\u76EE\u7684<code>Project Structure</code>\xA0\u2192\xA0<code>SDKs</code>\u91CC\u5C06<code>JDK</code>\u6E90\u7801\u5173\u8054\u5230\u81EA\u884C\u4E0B\u8F7D\u7684JDK\u6E90\u7801\u8DEF\u5F84\u4E0A\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-129ede68-c368-461e-92d6-38a8e5dee344.png" alt=""></p><p>\u8FD9\u6837\u65B9\u4FBF\u6211\u4EEC\u5BF9\u81EA\u5DF1\u4E0B\u8F7D\u7684<code>JDK\u6E90\u7801</code>\u8FDB\u884C<strong>\u9605\u8BFB</strong>\u3001<strong>\u8C03\u8BD5</strong>\u3001<strong>\u4FEE\u6539</strong>\u3001\u4EE5\u53CA\u5728\u6E90\u7801\u91CC\u968F\u610F<strong>\u505A\u7B14\u8BB0</strong>\u548C<strong>\u52A0\u6CE8\u91CA</strong>\u3002</p><p>\u4E3E\u4E2A\u6700\u7B80\u5355\u7684\u4F8B\u5B50\uFF0C\u6BD4\u5982\u6211\u4EEC\u6253\u5F00<code>System.out.println()</code>\u8FD9\u4E2A\u51FD\u6570\u7684\u5E95\u5C42\u6E90\u7801\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-c406b2a2-208a-4a54-a869-b3f526e93ccd.png" alt=""></p><p>\u6211\u4EEC\u968F\u4FBF\u7ED9\u5B83\u4FEE\u6539\u4E00\u4E0B\uFF0C\u52A0\u4E24\u884C\u7B80\u5355\u7684\u6807\u8BB0\uFF0C\u50CF\u8FD9\u6837\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-2a46b215-04e5-458a-b475-4dc31d7fe326.png" alt=""></p><p>\u4E3A\u4E86\u4F7F\u6211\u4EEC\u65B0\u52A0\u7684\u4EE3\u7801\u884C\u751F\u6548\uFF0C\u6211\u4EEC\u5FC5\u987B\u8981\u91CD\u65B0\u53BBJDK\u6E90\u7801\u7684\u6839\u76EE\u5F55\u4E2D\u518D\u6B21\u6267\u884C\xA0<code>make images</code>\u91CD\u65B0\u7F16\u8BD1\u751F\u6210JDK\u65B9\u53EF\u751F\u6548\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-fd3cf88d-007e-4615-99b5-a3499c35ef40.png" alt=""></p><p>\u56E0\u4E3A\u4E4B\u524D\u5DF2\u7ECF\u5168\u91CF\u7F16\u8BD1\u8FC7\u4E86\uFF0C\u6240\u4EE5\u518D\u6B21<code>make</code>\u7684\u65F6\u5019\u589E\u91CF\u7F16\u8BD1\u4E00\u822C\u5F88\u5FEB\u3002</p><p>\u91CD\u65B0\u7F16\u8BD1\u4E4B\u540E\uFF0C\u6211\u4EEC\u518D\u6B21\u8FD0\u884C<code>JdkTest</code>\u9879\u76EE\uFF0C\u5C31\u53EF\u4EE5\u770B\u5230\u6539\u52A8\u7684\u6548\u679C\u4E86\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-33dc0de6-2690-4ba2-9fe7-0e450c44c07b.png" alt=""></p><hr><h2 id="\u591A\u884C\u6CE8\u91CA\u7684\u95EE\u9898" tabindex="-1"><a class="header-anchor" href="#\u591A\u884C\u6CE8\u91CA\u7684\u95EE\u9898" aria-hidden="true">#</a> \u591A\u884C\u6CE8\u91CA\u7684\u95EE\u9898</h2>',132),b=e("\u8BB0\u5F97\u4E4B\u524D\u642D\u5EFA"),m={href:"https://link.segmentfault.com/?enc=JrtwTM%2BhTi%2B7DiRtBYeZSQ%3D%3D.T2U2BwPhK3iqeNk%2B%2BMuGttrqlD2zy9v1C%2BqYPvIYEvcvkTe1xyPrnnb%2FdaTGkBqY",target:"_blank",rel:"noopener noreferrer"},l=e("\u300AJDK\u6E90\u7801\u9605\u8BFB\u73AF\u5883\u300B"),g=e("\u65F6\uFF0C\u5927\u5BB6\u53EF\u80FD\u53D1\u73B0\u4E86\u4E00\u4E2A\u95EE\u9898\uFF1A\u9605\u8BFB\u6E90\u7801\u561B\uFF0C\u7ED9\u6E90\u4EE3\u7801\u505A\u70B9\u6CE8\u91CA\u6216\u7B14\u8BB0\u5F88\u5E38\u89C1\uFF01\u4F46\u90A3\u65F6\u5019\u6709\u4E2A\u95EE\u9898\u5C31\u662F\u505A\u6CE8\u91CA\u65F6"),h=o("strong",null,"\u4E0D\u53EF\u6539\u53D8\u4EE3\u7801\u7684\u884C\u7ED3\u6784",-1),j=e("\uFF08\u53EA\u80FD\u884C\u5C3E\u6CE8\u91CA\uFF0C\u4E0D\u80FD\u8DE8\u884C\u6CE8\u91CA\uFF09\uFF0C\u5426\u5219debug\u8C03\u8BD5\u65F6\u4F1A\u51FA\u73B0"),v=o("strong",null,"\u884C\u53F7\u9519\u4F4D",-1),J=e("\u7684\u95EE\u9898\u3002"),k=c('<p>\u539F\u56E0\u5F88\u7B80\u5355\uFF0C\u56E0\u4E3A\u6211\u4EEC\u867D\u7136\u505A\u4E86\u6E90\u4EE3\u7801\u76EE\u5F55\u7684\u6620\u5C04\uFF0C\u4F46\u662F\u5B9E\u9645\u652F\u6491\u8FD0\u884C\u7684<code>JDK</code>\u8FD8\u662F\u9884\u5148\u5B89\u88C5\u597D\u7684\u90A3\u4E2AJDK\u73AF\u5883\uFF0C\u5E76\u4E0D\u662F\u6839\u636E\u6211\u4EEC\u4FEE\u6539\u540E\u7684\u6E90\u7801\u6765\u91CD\u65B0\u7F16\u8BD1\u6784\u5EFA\u7684\uFF0C\u6240\u4EE5\u770B\u5230\u8FD9\u91CC\uFF0C\u89E3\u51B3\u8FD9\u4E2A\u95EE\u9898\u5C31\u5F88\u7B80\u5355\uFF0C\u5C31\u50CF\u4E0A\u9762\u4E00\u6837\u81EA\u884C\u7F16\u8BD1\u4E00\u4E0B<code>JDK</code>\u5373\u53EF\u3002</p><p>\u5B9E\u9645\u5728\u5B9E\u9A8C\u65F6\uFF0C\u8FD8\u6709\u4E00\u4E2A\u5F88\u5178\u578B\u7684\u95EE\u9898\u662F\uFF0C\u5F53\u6DFB\u52A0\u4E86\u591A\u884C\u7684\u4E2D\u6587\u6CE8\u91CA\u540E\uFF0C\u518D\u7F16\u8BD1\u5C45\u7136\u4F1A\u62A5\u9519\uFF01</p><p>\u6BD4\u5982\uFF0C\u8FD8\u662F\u4EE5\u4E0A\u9762\u4F8B\u5B50\u4E2D\u6700\u7B80\u5355\u7684<code>System.out.println()</code>\u6E90\u7801\u4E3A\u4F8B\uFF0C\u6211\u4EEC\u6DFB\u52A0\u51E0\u884C\u4E2D\u6587\u6CE8\u91CA\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-d6a44833-b908-4824-8862-1679bfdddfa3.png" alt=""></p><p>\u8FD9\u65F6\u5019\u6211\u4EEC\u53BBJDK\u6E90\u7801\u76EE\u5F55\u4E0B\u7F16\u8BD1\u4F1A\u53D1\u73B0\u6EE1\u5C4F\u7C7B\u4F3C\u8FD9\u6837\u7684\u62A5\u9519\uFF1A</p><blockquote><p>\u9519\u8BEF: \u7F16\u7801 ascii \u7684\u4E0D\u53EF\u6620\u5C04\u5B57\u7B26</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-ad0ca5a3-36c7-477d-bd58-d6731a87d762.png" alt=""></p><p>\u987F\u65F6\u6709\u70B9\u61F5\uFF0C\u6BD5\u7ADF\u4EC5\u4EC5\u662F\u52A0\u4E86\u51E0\u884C\u6CE8\u91CA\u3002\u5BF9\u4E8E\u6211\u4EEC\u6765\u8BF4\uFF0C\u6E90\u7801\u91CC\u5199\u70B9\u591A\u884C\u7684\u4E2D\u6587\u6CE8\u91CA\u57FA\u672C\u662F<strong>\u521A\u9700</strong>\uFF0C\u7136\u800C\u7F16\u8BD1\u7ADF\u4F1A\u62A5\u9519\uFF0C\u8FD9\u8FD8\u80FD\u4E0D\u80FD\u8BA9\u4EBA\u6109\u5FEB\u7684\u73A9\u800D\u4E86... \u5F53\u65F6\u540E\u80CC\u6709\u70B9\u53D1\u51C9\u3002</p><p>\u5B9E\u4E0D\u76F8\u7792\uFF0C\u5C31\u8FD9\u4E2A\u95EE\u9898\u6392\u67E5\u4E86\u4E00\u6BB5\u65F6\u95F4\uFF0C\u71AC\u5230\u4E86\u5F88\u665A\u3002\u6700\u7EC8\u6298\u817E\u4E86\u4E00\u756A\uFF0C\u901A\u8FC7\u5982\u4E0B\u8FD9\u79CD\u65B9\u5F0F\u89E3\u51B3\u4E86\uFF0C\u987A\u4FBF\u5206\u4EAB\u7ED9\u5C0F\u4F19\u4F34\u4EEC\uFF0C\u5927\u5BB6\u5982\u679C\u9047\u5230\u4E86\u8FD9\u4E2A\u95EE\u9898\uFF0C\u53EF\u4EE5\u53C2\u8003\u7740\u89E3\u51B3\u4E00\u4E0B\u3002</p><p>\u56E0\u4E3A\u4ECE\u63A7\u5236\u53F0\u7684\u62A5\u9519\u53EF\u4EE5\u5F88\u660E\u663E\u7684\u770B\u51FA\uFF0C\u80AF\u5B9A\u662F\u5B57\u7B26\u7F16\u7801\u76F8\u5173\u7684\u95EE\u9898\u5BFC\u81F4\u7684\uFF0C\u800C\u4E14\u90FD\u6307\u5411\u4E86<code>ascii</code>\u8FD9\u79CD\u7F16\u7801\u65B9\u5F0F\u3002</p><p>\u4E8E\u662F\u5C06JDK\u7684\u6E90\u7801\u4ECE\u6839\u76EE\u5F55\u5BFC\u5165\u4E86Vs Code\uFF0C\u7136\u540E\u5168\u76EE\u5F55\u67E5\u627E<code>encoding ascii</code>\u76F8\u5173\u7684\u5185\u5BB9\uFF0C\u770B\u770B\u6709\u6CA1\u6709\u4EC0\u4E48\u7AEF\u502A\uFF0C\u7ED3\u679C\u53D1\u73B0</p><p><code>jdk\u6E90\u7801\u6839\u76EE\u5F55/make/common/SetupJavaCompilers.gmk</code>\u6587\u4EF6\u4E2D\u6709\u4E24\u5904\u6307\u5B9A\u4E86<code>ascii</code>\u76F8\u5173\u7684\u7F16\u7801\u65B9\u5F0F\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-a86933af-f6d5-4d45-b4ca-33069a212c52.png" alt=""></p><p>\u4E8E\u662F\u5C1D\u8BD5\u5C06\u8FD9\u4E24\u5904<code>-encoding ascii</code>\u7684\u5747\u66FF\u6362\u6210<code>-encoding utf-8</code>\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-c8117faf-d027-48d3-869b-32d0e98e8372.png" alt=""></p><p>\u7136\u540E\u518D\u6B21\u6267\u884C<code>make images</code>\u7F16\u8BD1\uFF0C\u7F16\u8BD1\u987A\u5229\u901A\u8FC7\uFF01</p><p>\u81F3\u6B64\u5927\u529F\u544A\u6210\uFF01</p><p>\u8FD9\u6837\u540E\u9762\u4E0D\u7BA1\u662F<strong>\u9605\u8BFB</strong>\u3001<strong>\u8C03\u8BD5</strong>\u8FD8\u662F<strong>\u5B9A\u5236</strong><code>JDK</code>\u6E90\u7801\u90FD\u975E\u5E38\u65B9\u4FBF\u4E86\u3002</p><hr><p>\u5F15\u7528\u94FE\u63A5\uFF1Ahttps://segmentfault.com/a/1190000023251649</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p>',21);function D(f,u){const d=t("ExternalLinkIcon");return r(),p("div",null,[s,o("p",null,[b,o("a",m,[l,i(d)]),g,h,j,v,J]),k])}var x=a(n,[["render",D],["__file","compile-jdk.html.vue"]]);export{x as default};
diff --git a/dist/assets/computer-base.html.1ca00f7c.js b/dist/assets/computer-base.html.ca77cdaf.js
similarity index 96%
rename from dist/assets/computer-base.html.1ca00f7c.js
rename to dist/assets/computer-base.html.ca77cdaf.js
index c8e32fd2..1b691a02 100644
--- a/dist/assets/computer-base.html.1ca00f7c.js
+++ b/dist/assets/computer-base.html.ca77cdaf.js
@@ -1 +1 @@
-import{_ as o}from"./plugin-vue_export-helper.21dcd24c.js";import{r as s,o as a,c,a as e,b as n,d as r}from"./app.a0271b9c.js";const i={},l=e("h1",{id:"\u8BA1\u7B97\u673A\u57FA\u7840",tabindex:"-1"},[e("a",{class:"header-anchor",href:"#\u8BA1\u7B97\u673A\u57FA\u7840","aria-hidden":"true"},"#"),r(" \u8BA1\u7B97\u673A\u57FA\u7840")],-1),_=e("h2",{id:"\u6570\u636E\u7ED3\u6784",tabindex:"-1"},[e("a",{class:"header-anchor",href:"#\u6570\u636E\u7ED3\u6784","aria-hidden":"true"},"#"),r(" \u6570\u636E\u7ED3\u6784")],-1),h={href:"https://mp.weixin.qq.com/s/fc48Z5tSMlBHweYIS1UL0g",target:"_blank",rel:"noopener noreferrer"},d=r("\u6808"),p={href:"https://mp.weixin.qq.com/s/TCg9_3cVuDfZLqK2eYrc7w",target:"_blank",rel:"noopener noreferrer"},f=r("\u961F\u5217"),m={href:"https://mp.weixin.qq.com/s/BbDQPEPY6Etp9F8gQSBchw",target:"_blank",rel:"noopener noreferrer"},u=r("\u970D\u592B\u66FC\u7F16\u7801"),x=e("h2",{id:"\u524D\u7AEF",tabindex:"-1"},[e("a",{class:"header-anchor",href:"#\u524D\u7AEF","aria-hidden":"true"},"#"),r(" \u524D\u7AEF")],-1),b={href:"https://mp.weixin.qq.com/s/BrYyhCyQwBEZOwgJZeaTOw",target:"_blank",rel:"noopener noreferrer"},q=r("\u524D\u7AEF\u6700\u52AA\u529B\u7684\u540C\u5B66\u90FD\u662F\u5982\u4F55\u5B66\u4E60\u7684\uFF1F"),w={href:"https://mp.weixin.qq.com/s/sos0tc_pTptzQimBNSS-vg",target:"_blank",rel:"noopener noreferrer"},g=r("\u524D\u7AEF\u5B66\u4E60\u8D44\u6599");function B(k,E){const t=s("ExternalLinkIcon");return a(),c("div",null,[l,_,e("ul",null,[e("li",null,[e("a",h,[d,n(t)])]),e("li",null,[e("a",p,[f,n(t)])]),e("li",null,[e("a",m,[u,n(t)])])]),x,e("ul",null,[e("li",null,[e("a",b,[q,n(t)])]),e("li",null,[e("a",w,[g,n(t)])])])])}var L=o(i,[["render",B],["__file","computer-base.html.vue"]]);export{L as default};
+import{_ as o}from"./plugin-vue_export-helper.21dcd24c.js";import{r as s,o as a,c,a as e,b as n,d as r}from"./app.615e41d8.js";const i={},l=e("h1",{id:"\u8BA1\u7B97\u673A\u57FA\u7840",tabindex:"-1"},[e("a",{class:"header-anchor",href:"#\u8BA1\u7B97\u673A\u57FA\u7840","aria-hidden":"true"},"#"),r(" \u8BA1\u7B97\u673A\u57FA\u7840")],-1),_=e("h2",{id:"\u6570\u636E\u7ED3\u6784",tabindex:"-1"},[e("a",{class:"header-anchor",href:"#\u6570\u636E\u7ED3\u6784","aria-hidden":"true"},"#"),r(" \u6570\u636E\u7ED3\u6784")],-1),h={href:"https://mp.weixin.qq.com/s/fc48Z5tSMlBHweYIS1UL0g",target:"_blank",rel:"noopener noreferrer"},d=r("\u6808"),p={href:"https://mp.weixin.qq.com/s/TCg9_3cVuDfZLqK2eYrc7w",target:"_blank",rel:"noopener noreferrer"},f=r("\u961F\u5217"),m={href:"https://mp.weixin.qq.com/s/BbDQPEPY6Etp9F8gQSBchw",target:"_blank",rel:"noopener noreferrer"},u=r("\u970D\u592B\u66FC\u7F16\u7801"),x=e("h2",{id:"\u524D\u7AEF",tabindex:"-1"},[e("a",{class:"header-anchor",href:"#\u524D\u7AEF","aria-hidden":"true"},"#"),r(" \u524D\u7AEF")],-1),b={href:"https://mp.weixin.qq.com/s/BrYyhCyQwBEZOwgJZeaTOw",target:"_blank",rel:"noopener noreferrer"},q=r("\u524D\u7AEF\u6700\u52AA\u529B\u7684\u540C\u5B66\u90FD\u662F\u5982\u4F55\u5B66\u4E60\u7684\uFF1F"),w={href:"https://mp.weixin.qq.com/s/sos0tc_pTptzQimBNSS-vg",target:"_blank",rel:"noopener noreferrer"},g=r("\u524D\u7AEF\u5B66\u4E60\u8D44\u6599");function B(k,E){const t=s("ExternalLinkIcon");return a(),c("div",null,[l,_,e("ul",null,[e("li",null,[e("a",h,[d,n(t)])]),e("li",null,[e("a",p,[f,n(t)])]),e("li",null,[e("a",m,[u,n(t)])])]),x,e("ul",null,[e("li",null,[e("a",b,[q,n(t)])]),e("li",null,[e("a",w,[g,n(t)])])])])}var L=o(i,[["render",B],["__file","computer-base.html.vue"]]);export{L as default};
diff --git a/dist/assets/condition.html.dcd667af.js b/dist/assets/condition.html.4a44859a.js
similarity index 99%
rename from dist/assets/condition.html.dcd667af.js
rename to dist/assets/condition.html.4a44859a.js
index edd82954..e1da343d 100644
--- a/dist/assets/condition.html.dcd667af.js
+++ b/dist/assets/condition.html.4a44859a.js
@@ -1,4 +1,4 @@
-import{_ as e}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o,c,a as n,b as a,e as i,d as t}from"./app.a0271b9c.js";const l={},u=i(`<h1 id="\u6DF1\u5165\u7406\u89E3java\u5E76\u53D1\u7EBF\u7A0B\u534F\u4F5C\u7C7Bcondition" tabindex="-1"><a class="header-anchor" href="#\u6DF1\u5165\u7406\u89E3java\u5E76\u53D1\u7EBF\u7A0B\u534F\u4F5C\u7C7Bcondition" aria-hidden="true">#</a> \u6DF1\u5165\u7406\u89E3Java\u5E76\u53D1\u7EBF\u7A0B\u534F\u4F5C\u7C7BCondition</h1><h2 id="condition\u7B80\u4ECB" tabindex="-1"><a class="header-anchor" href="#condition\u7B80\u4ECB" aria-hidden="true">#</a> Condition\u7B80\u4ECB</h2><p>\u4EFB\u4F55\u4E00\u4E2Ajava\u5BF9\u8C61\u90FD\u5929\u7136\u7EE7\u627F\u4E8EObject\u7C7B\uFF0C\u5728\u7EBF\u7A0B\u95F4\u5B9E\u73B0\u901A\u4FE1\u7684\u5F80\u5F80\u4F1A\u5E94\u7528\u5230Object\u7684\u51E0\u4E2A\u65B9\u6CD5\uFF1A</p><ul><li>wait()</li><li>wait(long timeout)</li><li>wait(long timeout, int nanos)</li><li>notify()</li><li>notifyAll()</li></ul><p>\u540C\u6837\u7684\uFF0C \u5728java Lock\u4F53\u7CFB\u4E0B\u4F9D\u7136\u4F1A\u6709\u540C\u6837\u7684\u65B9\u6CD5\u5B9E\u73B0\u7B49\u5F85/\u901A\u77E5\u673A\u5236\u3002</p><p>\u4ECE\u6574\u4F53\u4E0A\u6765\u770B<strong>Object\u7684wait\u548Cnotify/notify\u662F\u4E0E\u5BF9\u8C61\u76D1\u89C6\u5668\u914D\u5408\u5B8C\u6210\u7EBF\u7A0B\u95F4\u7684\u7B49\u5F85/\u901A\u77E5\u673A\u5236\uFF0C\u800CCondition\u4E0ELock\u914D\u5408\u5B8C\u6210\u7B49\u5F85\u901A\u77E5\u673A\u5236\uFF0C\u524D\u8005\u662Fjava\u5E95\u5C42\u7EA7\u522B\u7684\uFF0C\u540E\u8005\u662F\u8BED\u8A00\u7EA7\u522B\u7684\uFF0C\u5177\u6709\u66F4\u9AD8\u7684\u53EF\u63A7\u5236\u6027\u548C\u6269\u5C55\u6027</strong>\u3002</p><p>\u4E24\u8005\u9664\u4E86\u5728\u4F7F\u7528\u65B9\u5F0F\u4E0A\u4E0D\u540C\u5916\uFF0C\u5728<strong>\u529F\u80FD\u7279\u6027</strong>\u4E0A\u8FD8\u662F\u6709\u5F88\u591A\u7684\u4E0D\u540C\uFF1A</p><ol><li>Condition\u80FD\u591F\u652F\u6301\u4E0D\u54CD\u5E94\u4E2D\u65AD\uFF0C\u800C\u901A\u8FC7\u4F7F\u7528Object\u65B9\u5F0F\u4E0D\u652F\u6301\uFF1B</li><li>Condition\u80FD\u591F\u652F\u6301\u591A\u4E2A\u7B49\u5F85\u961F\u5217\uFF08new \u591A\u4E2ACondition\u5BF9\u8C61\uFF09\uFF0C\u800CObject\u65B9\u5F0F\u53EA\u80FD\u652F\u6301\u4E00\u4E2A\uFF1B</li><li>Condition\u80FD\u591F\u652F\u6301\u8D85\u65F6\u65F6\u95F4\u7684\u8BBE\u7F6E\uFF0C\u800CObject\u4E0D\u652F\u6301</li></ol><p>\u53C2\u7167Object\u7684wait\u548Cnotify/notifyAll\u65B9\u6CD5\uFF0CCondition\u4E5F\u63D0\u4F9B\u4E86\u540C\u6837\u7684\u65B9\u6CD5\uFF1A</p><p><strong>\u9488\u5BF9Object\u7684wait\u65B9\u6CD5</strong></p><ol><li><code>void await() throws InterruptedException</code>:\u5F53\u524D\u7EBF\u7A0B\u8FDB\u5165\u7B49\u5F85\u72B6\u6001\uFF0C\u5982\u679C\u5176\u4ED6\u7EBF\u7A0B\u8C03\u7528condition\u7684signal\u6216\u8005signalAll\u65B9\u6CD5\u5E76\u4E14\u5F53\u524D\u7EBF\u7A0B\u83B7\u53D6Lock\u4ECEawait\u65B9\u6CD5\u8FD4\u56DE\uFF0C\u5982\u679C\u5728\u7B49\u5F85\u72B6\u6001\u4E2D\u88AB\u4E2D\u65AD\u4F1A\u629B\u51FA\u88AB\u4E2D\u65AD\u5F02\u5E38\uFF1B</li><li><code>long awaitNanos(long nanosTimeout)</code>\uFF1A\u5F53\u524D\u7EBF\u7A0B\u8FDB\u5165\u7B49\u5F85\u72B6\u6001\u76F4\u5230\u88AB\u901A\u77E5\uFF0C\u4E2D\u65AD\u6216\u8005<strong>\u8D85\u65F6</strong>\uFF1B</li><li><code>boolean await(long time, TimeUnit unit)throws InterruptedException</code>\uFF1A\u540C\u7B2C\u4E8C\u79CD\uFF0C\u652F\u6301\u81EA\u5B9A\u4E49\u65F6\u95F4\u5355\u4F4D</li><li><code>boolean awaitUntil(Date deadline) throws InterruptedException</code>\uFF1A\u5F53\u524D\u7EBF\u7A0B\u8FDB\u5165\u7B49\u5F85\u72B6\u6001\u76F4\u5230\u88AB\u901A\u77E5\uFF0C\u4E2D\u65AD\u6216\u8005<strong>\u5230\u4E86\u67D0\u4E2A\u65F6\u95F4</strong></li></ol><p><strong>\u9488\u5BF9Object\u7684<code>notify/notifyAll</code>\u65B9\u6CD5</strong></p><ol><li><code>void signal()</code>\uFF1A\u5524\u9192\u4E00\u4E2A\u7B49\u5F85\u5728condition\u4E0A\u7684\u7EBF\u7A0B\uFF0C\u5C06\u8BE5\u7EBF\u7A0B\u4ECE<strong>\u7B49\u5F85\u961F\u5217</strong>\u4E2D\u8F6C\u79FB\u5230<strong>\u540C\u6B65\u961F\u5217</strong>\u4E2D\uFF0C\u5982\u679C\u5728\u540C\u6B65\u961F\u5217\u4E2D\u80FD\u591F\u7ADE\u4E89\u5230Lock\u5219\u53EF\u4EE5\u4ECE\u7B49\u5F85\u65B9\u6CD5\u4E2D\u8FD4\u56DE\u3002</li><li><code>void signalAll()</code>\uFF1A\u4E0E1\u7684\u533A\u522B\u5728\u4E8E\u80FD\u591F\u5524\u9192\u6240\u6709\u7B49\u5F85\u5728condition\u4E0A\u7684\u7EBF\u7A0B</li></ol><h2 id="condition\u5B9E\u73B0\u539F\u7406\u5206\u6790" tabindex="-1"><a class="header-anchor" href="#condition\u5B9E\u73B0\u539F\u7406\u5206\u6790" aria-hidden="true">#</a> Condition\u5B9E\u73B0\u539F\u7406\u5206\u6790</h2><h3 id="\u7B49\u5F85\u961F\u5217" tabindex="-1"><a class="header-anchor" href="#\u7B49\u5F85\u961F\u5217" aria-hidden="true">#</a> \u7B49\u5F85\u961F\u5217</h3><p>\u8981\u60F3\u80FD\u591F\u6DF1\u5165\u7684\u638C\u63E1condition\u8FD8\u662F\u5E94\u8BE5\u77E5\u9053\u5B83\u7684\u5B9E\u73B0\u539F\u7406\uFF0C\u73B0\u5728\u6211\u4EEC\u4E00\u8D77\u6765\u770B\u770Bcondiiton\u7684\u6E90\u7801\u3002</p><p>\u521B\u5EFA\u4E00\u4E2Acondition\u5BF9\u8C61\u662F\u901A\u8FC7<code>lock.newCondition()</code>,\u800C\u8FD9\u4E2A\u65B9\u6CD5\u5B9E\u9645\u4E0A\u662F\u4F1Anew\u51FA\u4E00\u4E2A<strong>ConditionObject</strong>\u5BF9\u8C61\uFF0C\u8BE5\u7C7B\u662FAQS\u7684\u4E00\u4E2A\u5185\u90E8\u7C7B\u3002</p><p>\u524D\u9762\u6211\u4EEC\u8BF4\u8FC7\uFF0Ccondition\u662F\u8981\u548Clock\u914D\u5408\u4F7F\u7528\u7684\u4E5F\u5C31\u662Fcondition\u548CLock\u662F\u7ED1\u5B9A\u5728\u4E00\u8D77\u7684\uFF0C\u800Clock\u7684\u5B9E\u73B0\u539F\u7406\u53C8\u4F9D\u8D56\u4E8EAQS\uFF0C\u81EA\u7136\u800C\u7136ConditionObject\u5C31\u6210\u4E3A\u4E86AQS\u7684\u4E00\u4E2A\u5185\u90E8\u7C7B\u3002</p><p>\u5728\u9501\u673A\u5236\u7684\u5B9E\u73B0\u4E0A\uFF0CAQS\u5185\u90E8\u7EF4\u62A4\u4E86\u4E00\u4E2A\u540C\u6B65\u961F\u5217\uFF0C\u5982\u679C\u662F\u72EC\u5360\u5F0F\u9501\u7684\u8BDD\uFF0C\u6240\u6709\u83B7\u53D6\u9501\u5931\u8D25\u7684\u7EBF\u7A0B\u7684\u5C3E\u63D2\u5165\u5230<strong>\u540C\u6B65\u961F\u5217</strong>\uFF0C\u540C\u6837\u7684\uFF0Ccondition\u5185\u90E8\u4E5F\u662F\u4F7F\u7528\u540C\u6837\u7684\u65B9\u5F0F\uFF0C\u5185\u90E8\u7EF4\u62A4\u4E86\u4E00\u4E2A <strong>\u7B49\u5F85\u961F\u5217</strong>\uFF0C\u6240\u6709\u8C03\u7528condition.await\u65B9\u6CD5\u7684\u7EBF\u7A0B\u4F1A\u52A0\u5165\u5230\u7B49\u5F85\u961F\u5217\u4E2D\uFF0C\u5E76\u4E14\u7EBF\u7A0B\u72B6\u6001\u8F6C\u6362\u4E3A\u7B49\u5F85\u72B6\u6001\u3002\u53E6\u5916\u6CE8\u610F\u5230ConditionObject\u4E2D\u6709\u4E24\u4E2A\u6210\u5458\u53D8\u91CF\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token doc-comment comment">/** First node of condition queue. */</span>
+import{_ as e}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o,c,a as n,b as a,e as i,d as t}from"./app.615e41d8.js";const l={},u=i(`<h1 id="\u6DF1\u5165\u7406\u89E3java\u5E76\u53D1\u7EBF\u7A0B\u534F\u4F5C\u7C7Bcondition" tabindex="-1"><a class="header-anchor" href="#\u6DF1\u5165\u7406\u89E3java\u5E76\u53D1\u7EBF\u7A0B\u534F\u4F5C\u7C7Bcondition" aria-hidden="true">#</a> \u6DF1\u5165\u7406\u89E3Java\u5E76\u53D1\u7EBF\u7A0B\u534F\u4F5C\u7C7BCondition</h1><h2 id="condition\u7B80\u4ECB" tabindex="-1"><a class="header-anchor" href="#condition\u7B80\u4ECB" aria-hidden="true">#</a> Condition\u7B80\u4ECB</h2><p>\u4EFB\u4F55\u4E00\u4E2Ajava\u5BF9\u8C61\u90FD\u5929\u7136\u7EE7\u627F\u4E8EObject\u7C7B\uFF0C\u5728\u7EBF\u7A0B\u95F4\u5B9E\u73B0\u901A\u4FE1\u7684\u5F80\u5F80\u4F1A\u5E94\u7528\u5230Object\u7684\u51E0\u4E2A\u65B9\u6CD5\uFF1A</p><ul><li>wait()</li><li>wait(long timeout)</li><li>wait(long timeout, int nanos)</li><li>notify()</li><li>notifyAll()</li></ul><p>\u540C\u6837\u7684\uFF0C \u5728java Lock\u4F53\u7CFB\u4E0B\u4F9D\u7136\u4F1A\u6709\u540C\u6837\u7684\u65B9\u6CD5\u5B9E\u73B0\u7B49\u5F85/\u901A\u77E5\u673A\u5236\u3002</p><p>\u4ECE\u6574\u4F53\u4E0A\u6765\u770B<strong>Object\u7684wait\u548Cnotify/notify\u662F\u4E0E\u5BF9\u8C61\u76D1\u89C6\u5668\u914D\u5408\u5B8C\u6210\u7EBF\u7A0B\u95F4\u7684\u7B49\u5F85/\u901A\u77E5\u673A\u5236\uFF0C\u800CCondition\u4E0ELock\u914D\u5408\u5B8C\u6210\u7B49\u5F85\u901A\u77E5\u673A\u5236\uFF0C\u524D\u8005\u662Fjava\u5E95\u5C42\u7EA7\u522B\u7684\uFF0C\u540E\u8005\u662F\u8BED\u8A00\u7EA7\u522B\u7684\uFF0C\u5177\u6709\u66F4\u9AD8\u7684\u53EF\u63A7\u5236\u6027\u548C\u6269\u5C55\u6027</strong>\u3002</p><p>\u4E24\u8005\u9664\u4E86\u5728\u4F7F\u7528\u65B9\u5F0F\u4E0A\u4E0D\u540C\u5916\uFF0C\u5728<strong>\u529F\u80FD\u7279\u6027</strong>\u4E0A\u8FD8\u662F\u6709\u5F88\u591A\u7684\u4E0D\u540C\uFF1A</p><ol><li>Condition\u80FD\u591F\u652F\u6301\u4E0D\u54CD\u5E94\u4E2D\u65AD\uFF0C\u800C\u901A\u8FC7\u4F7F\u7528Object\u65B9\u5F0F\u4E0D\u652F\u6301\uFF1B</li><li>Condition\u80FD\u591F\u652F\u6301\u591A\u4E2A\u7B49\u5F85\u961F\u5217\uFF08new \u591A\u4E2ACondition\u5BF9\u8C61\uFF09\uFF0C\u800CObject\u65B9\u5F0F\u53EA\u80FD\u652F\u6301\u4E00\u4E2A\uFF1B</li><li>Condition\u80FD\u591F\u652F\u6301\u8D85\u65F6\u65F6\u95F4\u7684\u8BBE\u7F6E\uFF0C\u800CObject\u4E0D\u652F\u6301</li></ol><p>\u53C2\u7167Object\u7684wait\u548Cnotify/notifyAll\u65B9\u6CD5\uFF0CCondition\u4E5F\u63D0\u4F9B\u4E86\u540C\u6837\u7684\u65B9\u6CD5\uFF1A</p><p><strong>\u9488\u5BF9Object\u7684wait\u65B9\u6CD5</strong></p><ol><li><code>void await() throws InterruptedException</code>:\u5F53\u524D\u7EBF\u7A0B\u8FDB\u5165\u7B49\u5F85\u72B6\u6001\uFF0C\u5982\u679C\u5176\u4ED6\u7EBF\u7A0B\u8C03\u7528condition\u7684signal\u6216\u8005signalAll\u65B9\u6CD5\u5E76\u4E14\u5F53\u524D\u7EBF\u7A0B\u83B7\u53D6Lock\u4ECEawait\u65B9\u6CD5\u8FD4\u56DE\uFF0C\u5982\u679C\u5728\u7B49\u5F85\u72B6\u6001\u4E2D\u88AB\u4E2D\u65AD\u4F1A\u629B\u51FA\u88AB\u4E2D\u65AD\u5F02\u5E38\uFF1B</li><li><code>long awaitNanos(long nanosTimeout)</code>\uFF1A\u5F53\u524D\u7EBF\u7A0B\u8FDB\u5165\u7B49\u5F85\u72B6\u6001\u76F4\u5230\u88AB\u901A\u77E5\uFF0C\u4E2D\u65AD\u6216\u8005<strong>\u8D85\u65F6</strong>\uFF1B</li><li><code>boolean await(long time, TimeUnit unit)throws InterruptedException</code>\uFF1A\u540C\u7B2C\u4E8C\u79CD\uFF0C\u652F\u6301\u81EA\u5B9A\u4E49\u65F6\u95F4\u5355\u4F4D</li><li><code>boolean awaitUntil(Date deadline) throws InterruptedException</code>\uFF1A\u5F53\u524D\u7EBF\u7A0B\u8FDB\u5165\u7B49\u5F85\u72B6\u6001\u76F4\u5230\u88AB\u901A\u77E5\uFF0C\u4E2D\u65AD\u6216\u8005<strong>\u5230\u4E86\u67D0\u4E2A\u65F6\u95F4</strong></li></ol><p><strong>\u9488\u5BF9Object\u7684<code>notify/notifyAll</code>\u65B9\u6CD5</strong></p><ol><li><code>void signal()</code>\uFF1A\u5524\u9192\u4E00\u4E2A\u7B49\u5F85\u5728condition\u4E0A\u7684\u7EBF\u7A0B\uFF0C\u5C06\u8BE5\u7EBF\u7A0B\u4ECE<strong>\u7B49\u5F85\u961F\u5217</strong>\u4E2D\u8F6C\u79FB\u5230<strong>\u540C\u6B65\u961F\u5217</strong>\u4E2D\uFF0C\u5982\u679C\u5728\u540C\u6B65\u961F\u5217\u4E2D\u80FD\u591F\u7ADE\u4E89\u5230Lock\u5219\u53EF\u4EE5\u4ECE\u7B49\u5F85\u65B9\u6CD5\u4E2D\u8FD4\u56DE\u3002</li><li><code>void signalAll()</code>\uFF1A\u4E0E1\u7684\u533A\u522B\u5728\u4E8E\u80FD\u591F\u5524\u9192\u6240\u6709\u7B49\u5F85\u5728condition\u4E0A\u7684\u7EBF\u7A0B</li></ol><h2 id="condition\u5B9E\u73B0\u539F\u7406\u5206\u6790" tabindex="-1"><a class="header-anchor" href="#condition\u5B9E\u73B0\u539F\u7406\u5206\u6790" aria-hidden="true">#</a> Condition\u5B9E\u73B0\u539F\u7406\u5206\u6790</h2><h3 id="\u7B49\u5F85\u961F\u5217" tabindex="-1"><a class="header-anchor" href="#\u7B49\u5F85\u961F\u5217" aria-hidden="true">#</a> \u7B49\u5F85\u961F\u5217</h3><p>\u8981\u60F3\u80FD\u591F\u6DF1\u5165\u7684\u638C\u63E1condition\u8FD8\u662F\u5E94\u8BE5\u77E5\u9053\u5B83\u7684\u5B9E\u73B0\u539F\u7406\uFF0C\u73B0\u5728\u6211\u4EEC\u4E00\u8D77\u6765\u770B\u770Bcondiiton\u7684\u6E90\u7801\u3002</p><p>\u521B\u5EFA\u4E00\u4E2Acondition\u5BF9\u8C61\u662F\u901A\u8FC7<code>lock.newCondition()</code>,\u800C\u8FD9\u4E2A\u65B9\u6CD5\u5B9E\u9645\u4E0A\u662F\u4F1Anew\u51FA\u4E00\u4E2A<strong>ConditionObject</strong>\u5BF9\u8C61\uFF0C\u8BE5\u7C7B\u662FAQS\u7684\u4E00\u4E2A\u5185\u90E8\u7C7B\u3002</p><p>\u524D\u9762\u6211\u4EEC\u8BF4\u8FC7\uFF0Ccondition\u662F\u8981\u548Clock\u914D\u5408\u4F7F\u7528\u7684\u4E5F\u5C31\u662Fcondition\u548CLock\u662F\u7ED1\u5B9A\u5728\u4E00\u8D77\u7684\uFF0C\u800Clock\u7684\u5B9E\u73B0\u539F\u7406\u53C8\u4F9D\u8D56\u4E8EAQS\uFF0C\u81EA\u7136\u800C\u7136ConditionObject\u5C31\u6210\u4E3A\u4E86AQS\u7684\u4E00\u4E2A\u5185\u90E8\u7C7B\u3002</p><p>\u5728\u9501\u673A\u5236\u7684\u5B9E\u73B0\u4E0A\uFF0CAQS\u5185\u90E8\u7EF4\u62A4\u4E86\u4E00\u4E2A\u540C\u6B65\u961F\u5217\uFF0C\u5982\u679C\u662F\u72EC\u5360\u5F0F\u9501\u7684\u8BDD\uFF0C\u6240\u6709\u83B7\u53D6\u9501\u5931\u8D25\u7684\u7EBF\u7A0B\u7684\u5C3E\u63D2\u5165\u5230<strong>\u540C\u6B65\u961F\u5217</strong>\uFF0C\u540C\u6837\u7684\uFF0Ccondition\u5185\u90E8\u4E5F\u662F\u4F7F\u7528\u540C\u6837\u7684\u65B9\u5F0F\uFF0C\u5185\u90E8\u7EF4\u62A4\u4E86\u4E00\u4E2A <strong>\u7B49\u5F85\u961F\u5217</strong>\uFF0C\u6240\u6709\u8C03\u7528condition.await\u65B9\u6CD5\u7684\u7EBF\u7A0B\u4F1A\u52A0\u5165\u5230\u7B49\u5F85\u961F\u5217\u4E2D\uFF0C\u5E76\u4E14\u7EBF\u7A0B\u72B6\u6001\u8F6C\u6362\u4E3A\u7B49\u5F85\u72B6\u6001\u3002\u53E6\u5916\u6CE8\u610F\u5230ConditionObject\u4E2D\u6709\u4E24\u4E2A\u6210\u5458\u53D8\u91CF\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token doc-comment comment">/** First node of condition queue. */</span>
 <span class="token keyword">private</span> <span class="token keyword">transient</span> <span class="token class-name">Node</span> firstWaiter<span class="token punctuation">;</span>
 <span class="token doc-comment comment">/** Last node of condition queue. */</span>
 <span class="token keyword">private</span> <span class="token keyword">transient</span> <span class="token class-name">Node</span> lastWaiter<span class="token punctuation">;</span>
diff --git a/dist/assets/constant-pool.html.e2d85914.js b/dist/assets/constant-pool.html.81e697ea.js
similarity index 99%
rename from dist/assets/constant-pool.html.e2d85914.js
rename to dist/assets/constant-pool.html.81e697ea.js
index c0bdbf00..c7d28bf8 100644
--- a/dist/assets/constant-pool.html.e2d85914.js
+++ b/dist/assets/constant-pool.html.81e697ea.js
@@ -1,4 +1,4 @@
-import{_ as a}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as n,e}from"./app.a0271b9c.js";const p={},t=e(`<h1 id="\u6DF1\u5165\u4E86\u89E3java\u5B57\u7B26\u4E32\u5E38\u91CF\u6C60" tabindex="-1"><a class="header-anchor" href="#\u6DF1\u5165\u4E86\u89E3java\u5B57\u7B26\u4E32\u5E38\u91CF\u6C60" aria-hidden="true">#</a> \u6DF1\u5165\u4E86\u89E3Java\u5B57\u7B26\u4E32\u5E38\u91CF\u6C60</h1><p>\u201C\u4E09\u59B9\uFF0C\u4ECA\u5929\u6211\u4EEC\u6765\u5B66\u4E60\u4E00\u4E0B\u5B57\u7B26\u4E32\u5E38\u91CF\u6C60\u5427\uFF0C\u8FD9\u662F\u5B57\u7B26\u4E32\u4E2D\u975E\u5E38\u5173\u952E\u7684\u4E00\u4E2A\u77E5\u8BC6\u70B9\u3002\u201D\u6211\u8BDD\u97F3\u672A\u843D\uFF0C\u9752\u5C9B\u8DEF\u5C0F\u5B66\u90A3\u8FB9\u4F20\u6765\u4E86\u5639\u4EAE\u7684\u6B4C\u58F0\u5C31\u94BB\u8FDB\u4E86\u6211\u7684\u8033\u6735\uFF0C\u201C\u5531 ~ \u5C71 ~ \u6B4C ~\u201D</p><p>\u4E09\u59B9\u8BF4\uFF0C\u201C\u597D\u5440\uFF0C\u5F00\u59CB\u5427\uFF0C\u54E5\u3002\u201D</p><p>\u201C\u5148\u4ECE\u8FD9\u9053\u9762\u8BD5\u9898\u5F00\u59CB\u5427\uFF01\u201D</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">String</span> s <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">String</span><span class="token punctuation">(</span><span class="token string">&quot;\u4E8C\u54E5&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
+import{_ as a}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as n,e}from"./app.615e41d8.js";const p={},t=e(`<h1 id="\u6DF1\u5165\u4E86\u89E3java\u5B57\u7B26\u4E32\u5E38\u91CF\u6C60" tabindex="-1"><a class="header-anchor" href="#\u6DF1\u5165\u4E86\u89E3java\u5B57\u7B26\u4E32\u5E38\u91CF\u6C60" aria-hidden="true">#</a> \u6DF1\u5165\u4E86\u89E3Java\u5B57\u7B26\u4E32\u5E38\u91CF\u6C60</h1><p>\u201C\u4E09\u59B9\uFF0C\u4ECA\u5929\u6211\u4EEC\u6765\u5B66\u4E60\u4E00\u4E0B\u5B57\u7B26\u4E32\u5E38\u91CF\u6C60\u5427\uFF0C\u8FD9\u662F\u5B57\u7B26\u4E32\u4E2D\u975E\u5E38\u5173\u952E\u7684\u4E00\u4E2A\u77E5\u8BC6\u70B9\u3002\u201D\u6211\u8BDD\u97F3\u672A\u843D\uFF0C\u9752\u5C9B\u8DEF\u5C0F\u5B66\u90A3\u8FB9\u4F20\u6765\u4E86\u5639\u4EAE\u7684\u6B4C\u58F0\u5C31\u94BB\u8FDB\u4E86\u6211\u7684\u8033\u6735\uFF0C\u201C\u5531 ~ \u5C71 ~ \u6B4C ~\u201D</p><p>\u4E09\u59B9\u8BF4\uFF0C\u201C\u597D\u5440\uFF0C\u5F00\u59CB\u5427\uFF0C\u54E5\u3002\u201D</p><p>\u201C\u5148\u4ECE\u8FD9\u9053\u9762\u8BD5\u9898\u5F00\u59CB\u5427\uFF01\u201D</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">String</span> s <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">String</span><span class="token punctuation">(</span><span class="token string">&quot;\u4E8C\u54E5&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>\u201C\u8FD9\u884C\u4EE3\u7801\u521B\u5EFA\u4E86\u51E0\u4E2A\u5BF9\u8C61\uFF1F\u201D</p><p>\u201C\u4E0D\u5C31\u4E00\u4E2A\u5417\uFF1F\u201D\u4E09\u59B9\u4E0D\u5047\u601D\u7D22\u5730\u56DE\u7B54\u3002</p><p>\u201C\u4E0D\uFF0C\u4E24\u4E2A\uFF01\u201D\u6211\u76F4\u63A5\u5426\u5B9A\u4E86\u4E09\u59B9\u7684\u7B54\u6848\uFF0C\u201C\u4F7F\u7528 new \u5173\u952E\u5B57\u521B\u5EFA\u4E00\u4E2A\u5B57\u7B26\u4E32\u5BF9\u8C61\u65F6\uFF0CJava \u865A\u62DF\u673A\u4F1A\u5148\u5728\u5B57\u7B26\u4E32\u5E38\u91CF\u6C60\u4E2D\u67E5\u627E\u6709\u6CA1\u6709\u2018\u4E8C\u54E5\u2019\u8FD9\u4E2A\u5B57\u7B26\u4E32\u5BF9\u8C61\uFF0C\u5982\u679C\u6709\uFF0C\u5C31\u4E0D\u4F1A\u5728\u5B57\u7B26\u4E32\u5E38\u91CF\u6C60\u4E2D\u521B\u5EFA\u2018\u4E8C\u54E5\u2019\u8FD9\u4E2A\u5BF9\u8C61\u4E86\uFF0C\u76F4\u63A5\u5728\u5806\u4E2D\u521B\u5EFA\u4E00\u4E2A\u2018\u4E8C\u54E5\u2019\u7684\u5B57\u7B26\u4E32\u5BF9\u8C61\uFF0C\u7136\u540E\u5C06\u5806\u4E2D\u8FD9\u4E2A\u2018\u4E8C\u54E5\u2019\u7684\u5BF9\u8C61\u5730\u5740\u8FD4\u56DE\u8D4B\u503C\u7ED9\u53D8\u91CF s\u3002\u201D</p><p>\u201C\u5982\u679C\u6CA1\u6709\uFF0C\u5148\u5728\u5B57\u7B26\u4E32\u5E38\u91CF\u6C60\u4E2D\u521B\u5EFA\u4E00\u4E2A\u2018\u4E8C\u54E5\u2019\u7684\u5B57\u7B26\u4E32\u5BF9\u8C61\uFF0C\u7136\u540E\u518D\u5728\u5806\u4E2D\u521B\u5EFA\u4E00\u4E2A\u2018\u4E8C\u54E5\u2019\u7684\u5B57\u7B26\u4E32\u5BF9\u8C61\uFF0C\u7136\u540E\u5C06\u5806\u4E2D\u8FD9\u4E2A\u2018\u4E8C\u54E5\u2019\u7684\u5B57\u7B26\u4E32\u5BF9\u8C61\u5730\u5740\u8FD4\u56DE\u8D4B\u503C\u7ED9\u53D8\u91CF s\u3002\u201D</p><p>\u201C\u4E3A\u4EC0\u4E48\u8981\u5148\u5728\u5B57\u7B26\u4E32\u5E38\u91CF\u6C60\u4E2D\u521B\u5EFA\u5BF9\u8C61\uFF0C\u7136\u540E\u518D\u5728\u5806\u4E0A\u521B\u5EFA\u5462\uFF1F\u8FD9\u6837\u4E0D\u5C31\u591A\u6B64\u4E00\u4E3E\u4E86\uFF1F\u201D\u4E09\u59B9\u654F\u9510\u5730\u53D1\u73B0\u4E86\u95EE\u9898\u3002</p><p>\u6211\u56DE\u7B54\uFF0C\u201C\u7531\u4E8E\u5B57\u7B26\u4E32\u7684\u4F7F\u7528\u9891\u7387\u5B9E\u5728\u662F\u592A\u9AD8\u4E86\uFF0C\u6240\u4EE5 Java \u865A\u62DF\u673A\u4E3A\u4E86\u63D0\u9AD8\u6027\u80FD\u548C\u51CF\u5C11\u5185\u5B58\u5F00\u9500\uFF0C\u5728\u521B\u5EFA\u5B57\u7B26\u4E32\u5BF9\u8C61\u7684\u65F6\u5019\u8FDB\u884C\u4E86\u4E00\u4E9B\u4F18\u5316\uFF0C\u7279\u610F\u4E3A\u5B57\u7B26\u4E32\u5F00\u8F9F\u4E86\u4E00\u4E2A\u5B57\u7B26\u4E32\u5E38\u91CF\u6C60\u3002\u201D</p><p>\u901A\u5E38\u60C5\u51B5\u4E0B\uFF0C\u6211\u4EEC\u4F1A\u91C7\u7528\u53CC\u5F15\u53F7\u7684\u65B9\u5F0F\u6765\u521B\u5EFA\u5B57\u7B26\u4E32\u5BF9\u8C61\uFF0C\u800C\u4E0D\u662F\u901A\u8FC7 new \u5173\u952E\u5B57\u7684\u65B9\u5F0F\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">String</span> s <span class="token operator">=</span> <span class="token string">&quot;\u4E09\u59B9&quot;</span><span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>\u5F53\u6267\u884C <code>String s = &quot;\u4E09\u59B9&quot;</code> \u65F6\uFF0CJava \u865A\u62DF\u673A\u4F1A\u5148\u5728\u5B57\u7B26\u4E32\u5E38\u91CF\u6C60\u4E2D\u67E5\u627E\u6709\u6CA1\u6709\u201C\u4E09\u59B9\u201D\u8FD9\u4E2A\u5B57\u7B26\u4E32\u5BF9\u8C61\uFF0C\u5982\u679C\u6709\uFF0C\u5219\u4E0D\u521B\u5EFA\u4EFB\u4F55\u5BF9\u8C61\uFF0C\u76F4\u63A5\u5C06\u5B57\u7B26\u4E32\u5E38\u91CF\u6C60\u4E2D\u8FD9\u4E2A\u201C\u4E09\u59B9\u201D\u7684\u5BF9\u8C61\u5730\u5740\u8FD4\u56DE\uFF0C\u8D4B\u7ED9\u53D8\u91CF s\uFF1B\u5982\u679C\u6CA1\u6709\uFF0C\u5728\u5B57\u7B26\u4E32\u5E38\u91CF\u6C60\u4E2D\u521B\u5EFA\u201C\u4E09\u59B9\u201D\u8FD9\u4E2A\u5BF9\u8C61\uFF0C\u7136\u540E\u5C06\u5176\u5730\u5740\u8FD4\u56DE\uFF0C\u8D4B\u7ED9\u53D8\u91CF s\u3002</p><p>\u201C\u54E6\uFF0C\u6211\u660E\u767D\u4E86\uFF0C\u54E5\u3002\u201D\u4E09\u59B9\u7A81\u7136\u63D2\u8BDD\u5230\uFF0C\u201C\u6709\u4E86\u5B57\u7B26\u4E32\u5E38\u91CF\u6C60\uFF0C\u5C31\u53EF\u4EE5\u901A\u8FC7\u53CC\u5F15\u53F7\u7684\u65B9\u5F0F\u76F4\u63A5\u521B\u5EFA\u5B57\u7B26\u4E32\u5BF9\u8C61\uFF0C\u4E0D\u7528\u518D\u901A\u8FC7 new \u7684\u65B9\u5F0F\u5728\u5806\u4E2D\u521B\u5EFA\u5BF9\u8C61\u4E86\uFF0C\u5BF9\u5427\uFF1F\u201D</p><p>\u201C\u662F\u6EF4\u3002new \u7684\u65B9\u5F0F\u59CB\u7EC8\u4F1A\u521B\u5EFA\u4E00\u4E2A\u5BF9\u8C61\uFF0C\u4E0D\u7BA1\u5B57\u7B26\u4E32\u7684\u5185\u5BB9\u662F\u5426\u5DF2\u7ECF\u5B58\u5728\uFF0C\u800C\u53CC\u5F15\u53F7\u7684\u65B9\u5F0F\u4F1A\u91CD\u590D\u5229\u7528\u5B57\u7B26\u4E32\u5E38\u91CF\u6C60\u4E2D\u5DF2\u7ECF\u5B58\u5728\u7684\u5BF9\u8C61\u3002\u201D\u6211\u8BF4\u3002</p><p>\u6765\u770B\u4E0B\u9762\u8FD9\u4E2A\u4F8B\u5B50\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">String</span> s <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">String</span><span class="token punctuation">(</span><span class="token string">&quot;\u4E8C\u54E5&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 <span class="token class-name">String</span> s1 <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">String</span><span class="token punctuation">(</span><span class="token string">&quot;\u4E8C\u54E5&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
diff --git a/dist/assets/construct.html.ebfac9f1.js b/dist/assets/construct.html.0a38a577.js
similarity index 99%
rename from dist/assets/construct.html.ebfac9f1.js
rename to dist/assets/construct.html.0a38a577.js
index 010f0b5b..b90a40b6 100644
--- a/dist/assets/construct.html.ebfac9f1.js
+++ b/dist/assets/construct.html.0a38a577.js
@@ -1,4 +1,4 @@
-import{_ as p}from"./plugin-vue_export-helper.21dcd24c.js";import{r as e,o as t,c as o,a as n,b as c,d as s,e as l}from"./app.a0271b9c.js";const i={},u=n("h1",{id:"java\u6784\u9020\u65B9\u6CD5",tabindex:"-1"},[n("a",{class:"header-anchor",href:"#java\u6784\u9020\u65B9\u6CD5","aria-hidden":"true"},"#"),s(" Java\u6784\u9020\u65B9\u6CD5")],-1),k=s("\u6211\u5BF9\u4E09\u59B9\u8BF4\uFF0C\u201C"),r={href:"https://mp.weixin.qq.com/s/L4jAgQPurGZPvWu8ECtBpA",target:"_blank",rel:"noopener noreferrer"},d=s("\u4E0A\u4E00\u8282"),v=s("\u5B66\u4E86 Java \u4E2D\u7684\u65B9\u6CD5\uFF0C\u63A5\u7740\u5B66\u6784\u9020\u65B9\u6CD5\u7684\u8BDD\uFF0C\u96BE\u5EA6\u5C31\u5C0F\u5F88\u591A\u4E86\u3002\u201D"),m=l(`<p>\u201C\u5728 Java \u4E2D\uFF0C\u6784\u9020\u65B9\u6CD5\u662F\u4E00\u79CD\u7279\u6B8A\u7684\u65B9\u6CD5\uFF0C\u5F53\u4E00\u4E2A\u7C7B\u88AB\u5B9E\u4F8B\u5316\u7684\u65F6\u5019\uFF0C\u5C31\u4F1A\u8C03\u7528\u6784\u9020\u65B9\u6CD5\u3002\u53EA\u6709\u5728\u6784\u9020\u65B9\u6CD5\u88AB\u8C03\u7528\u7684\u65F6\u5019\uFF0C\u5BF9\u8C61\u624D\u4F1A\u88AB\u5206\u914D\u5185\u5B58\u7A7A\u95F4\u3002\u6BCF\u6B21\u4F7F\u7528 <code>new</code> \u5173\u952E\u5B57\u521B\u5EFA\u5BF9\u8C61\u7684\u65F6\u5019\uFF0C\u6784\u9020\u65B9\u6CD5\u81F3\u5C11\u4F1A\u88AB\u8C03\u7528\u4E00\u6B21\u3002\u201D</p><p>\u201C\u5982\u679C\u4F60\u5728\u4E00\u4E2A\u7C7B\u4E2D\u6CA1\u6709\u770B\u89C1\u6784\u9020\u65B9\u6CD5\uFF0C\u5E76\u4E0D\u662F\u56E0\u4E3A\u6784\u9020\u65B9\u6CD5\u4E0D\u5B58\u5728\uFF0C\u800C\u662F\u88AB\u7F3A\u7701\u4E86\uFF0C\u7F16\u8BD1\u5668\u4F1A\u7ED9\u8FD9\u4E2A\u7C7B\u63D0\u4F9B\u4E00\u4E2A\u9ED8\u8BA4\u7684\u6784\u9020\u65B9\u6CD5\u3002\u5F80\u5927\u7684\u65B9\u9762\u8BF4\uFF0C\u5C31\u662F\uFF0CJava \u6709\u4E24\u79CD\u7C7B\u578B\u7684\u6784\u9020\u65B9\u6CD5\uFF1A<strong>\u65E0\u53C2\u6784\u9020\u65B9\u6CD5\u548C\u6709\u53C2\u6784\u9020\u65B9\u6CD5</strong>\u3002\u201D</p><p>\u201C\u6CE8\u610F\uFF0C\u4E4B\u6240\u4EE5\u53EB\u5B83\u6784\u9020\u65B9\u6CD5\uFF0C\u662F\u56E0\u4E3A\u5BF9\u8C61\u5728\u521B\u5EFA\u7684\u65F6\u5019\uFF0C\u9700\u8981\u901A\u8FC7\u6784\u9020\u65B9\u6CD5\u521D\u59CB\u5316\u503C\u2014\u2014\u5C31\u662F\u63CF\u5199\u5BF9\u8C61\u7684\u90A3\u4E9B\u72B6\u6001\uFF0C\u5BF9\u5E94\u7684\u662F\u7C7B\u4E2D\u7684\u5B57\u6BB5\u3002\u201D</p><h3 id="_01\u3001\u521B\u5EFA\u6784\u9020\u65B9\u6CD5\u7684\u89C4\u5219\u6709\u54EA\u4E9B" tabindex="-1"><a class="header-anchor" href="#_01\u3001\u521B\u5EFA\u6784\u9020\u65B9\u6CD5\u7684\u89C4\u5219\u6709\u54EA\u4E9B" aria-hidden="true">#</a> 01\u3001\u521B\u5EFA\u6784\u9020\u65B9\u6CD5\u7684\u89C4\u5219\u6709\u54EA\u4E9B</h3><p>\u6784\u9020\u65B9\u6CD5\u5FC5\u987B\u7B26\u5408\u4EE5\u4E0B\u89C4\u5219\uFF1A</p><ul><li>\u6784\u9020\u65B9\u6CD5\u7684\u540D\u5B57\u5FC5\u987B\u548C\u7C7B\u540D\u4E00\u6837\uFF1B</li><li>\u6784\u9020\u65B9\u6CD5\u6CA1\u6709\u8FD4\u56DE\u7C7B\u578B\uFF0C\u5305\u62EC void\uFF1B</li><li>\u6784\u9020\u65B9\u6CD5\u4E0D\u80FD\u662F\u62BD\u8C61\u7684\u3001\u9759\u6001\u7684\u3001\u6700\u7EC8\u7684\u3001\u540C\u6B65\u7684\uFF0C\u4E5F\u5C31\u662F\u8BF4\uFF0C\u6784\u9020\u65B9\u6CD5\u4E0D\u80FD\u901A\u8FC7 abstract\u3001static\u3001final\u3001synchronized \u5173\u952E\u5B57\u4FEE\u9970\u3002</li></ul><p>\u7B80\u5355\u89E3\u6790\u4E00\u4E0B\u6700\u540E\u4E00\u6761\u89C4\u5219\u3002</p><ul><li>\u7531\u4E8E\u6784\u9020\u65B9\u6CD5\u4E0D\u80FD\u88AB\u5B50\u7C7B\u7EE7\u627F\uFF0C\u6240\u4EE5\u7528 final \u548C abstract \u4FEE\u9970\u6CA1\u6709\u610F\u4E49\uFF1B</li><li>\u6784\u9020\u65B9\u6CD5\u7528\u4E8E\u521D\u59CB\u5316\u4E00\u4E2A\u5BF9\u8C61\uFF0C\u6240\u4EE5\u7528 static \u4FEE\u9970\u6CA1\u6709\u610F\u4E49\uFF1B</li><li>\u591A\u4E2A\u7EBF\u7A0B\u4E0D\u4F1A\u540C\u65F6\u521B\u5EFA\u5185\u5B58\u5730\u5740\u76F8\u540C\u7684\u540C\u4E00\u4E2A\u5BF9\u8C61\uFF0C\u6240\u4EE5\u7528 synchronized \u4FEE\u9970\u6CA1\u6709\u5FC5\u8981\u3002</li></ul><p>\u6784\u9020\u65B9\u6CD5\u7684\u8BED\u6CD5\u683C\u5F0F\u5982\u4E0B\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">class</span> class_name <span class="token punctuation">{</span>
+import{_ as p}from"./plugin-vue_export-helper.21dcd24c.js";import{r as e,o as t,c as o,a as n,b as c,d as s,e as l}from"./app.615e41d8.js";const i={},u=n("h1",{id:"java\u6784\u9020\u65B9\u6CD5",tabindex:"-1"},[n("a",{class:"header-anchor",href:"#java\u6784\u9020\u65B9\u6CD5","aria-hidden":"true"},"#"),s(" Java\u6784\u9020\u65B9\u6CD5")],-1),k=s("\u6211\u5BF9\u4E09\u59B9\u8BF4\uFF0C\u201C"),r={href:"https://mp.weixin.qq.com/s/L4jAgQPurGZPvWu8ECtBpA",target:"_blank",rel:"noopener noreferrer"},d=s("\u4E0A\u4E00\u8282"),v=s("\u5B66\u4E86 Java \u4E2D\u7684\u65B9\u6CD5\uFF0C\u63A5\u7740\u5B66\u6784\u9020\u65B9\u6CD5\u7684\u8BDD\uFF0C\u96BE\u5EA6\u5C31\u5C0F\u5F88\u591A\u4E86\u3002\u201D"),m=l(`<p>\u201C\u5728 Java \u4E2D\uFF0C\u6784\u9020\u65B9\u6CD5\u662F\u4E00\u79CD\u7279\u6B8A\u7684\u65B9\u6CD5\uFF0C\u5F53\u4E00\u4E2A\u7C7B\u88AB\u5B9E\u4F8B\u5316\u7684\u65F6\u5019\uFF0C\u5C31\u4F1A\u8C03\u7528\u6784\u9020\u65B9\u6CD5\u3002\u53EA\u6709\u5728\u6784\u9020\u65B9\u6CD5\u88AB\u8C03\u7528\u7684\u65F6\u5019\uFF0C\u5BF9\u8C61\u624D\u4F1A\u88AB\u5206\u914D\u5185\u5B58\u7A7A\u95F4\u3002\u6BCF\u6B21\u4F7F\u7528 <code>new</code> \u5173\u952E\u5B57\u521B\u5EFA\u5BF9\u8C61\u7684\u65F6\u5019\uFF0C\u6784\u9020\u65B9\u6CD5\u81F3\u5C11\u4F1A\u88AB\u8C03\u7528\u4E00\u6B21\u3002\u201D</p><p>\u201C\u5982\u679C\u4F60\u5728\u4E00\u4E2A\u7C7B\u4E2D\u6CA1\u6709\u770B\u89C1\u6784\u9020\u65B9\u6CD5\uFF0C\u5E76\u4E0D\u662F\u56E0\u4E3A\u6784\u9020\u65B9\u6CD5\u4E0D\u5B58\u5728\uFF0C\u800C\u662F\u88AB\u7F3A\u7701\u4E86\uFF0C\u7F16\u8BD1\u5668\u4F1A\u7ED9\u8FD9\u4E2A\u7C7B\u63D0\u4F9B\u4E00\u4E2A\u9ED8\u8BA4\u7684\u6784\u9020\u65B9\u6CD5\u3002\u5F80\u5927\u7684\u65B9\u9762\u8BF4\uFF0C\u5C31\u662F\uFF0CJava \u6709\u4E24\u79CD\u7C7B\u578B\u7684\u6784\u9020\u65B9\u6CD5\uFF1A<strong>\u65E0\u53C2\u6784\u9020\u65B9\u6CD5\u548C\u6709\u53C2\u6784\u9020\u65B9\u6CD5</strong>\u3002\u201D</p><p>\u201C\u6CE8\u610F\uFF0C\u4E4B\u6240\u4EE5\u53EB\u5B83\u6784\u9020\u65B9\u6CD5\uFF0C\u662F\u56E0\u4E3A\u5BF9\u8C61\u5728\u521B\u5EFA\u7684\u65F6\u5019\uFF0C\u9700\u8981\u901A\u8FC7\u6784\u9020\u65B9\u6CD5\u521D\u59CB\u5316\u503C\u2014\u2014\u5C31\u662F\u63CF\u5199\u5BF9\u8C61\u7684\u90A3\u4E9B\u72B6\u6001\uFF0C\u5BF9\u5E94\u7684\u662F\u7C7B\u4E2D\u7684\u5B57\u6BB5\u3002\u201D</p><h3 id="_01\u3001\u521B\u5EFA\u6784\u9020\u65B9\u6CD5\u7684\u89C4\u5219\u6709\u54EA\u4E9B" tabindex="-1"><a class="header-anchor" href="#_01\u3001\u521B\u5EFA\u6784\u9020\u65B9\u6CD5\u7684\u89C4\u5219\u6709\u54EA\u4E9B" aria-hidden="true">#</a> 01\u3001\u521B\u5EFA\u6784\u9020\u65B9\u6CD5\u7684\u89C4\u5219\u6709\u54EA\u4E9B</h3><p>\u6784\u9020\u65B9\u6CD5\u5FC5\u987B\u7B26\u5408\u4EE5\u4E0B\u89C4\u5219\uFF1A</p><ul><li>\u6784\u9020\u65B9\u6CD5\u7684\u540D\u5B57\u5FC5\u987B\u548C\u7C7B\u540D\u4E00\u6837\uFF1B</li><li>\u6784\u9020\u65B9\u6CD5\u6CA1\u6709\u8FD4\u56DE\u7C7B\u578B\uFF0C\u5305\u62EC void\uFF1B</li><li>\u6784\u9020\u65B9\u6CD5\u4E0D\u80FD\u662F\u62BD\u8C61\u7684\u3001\u9759\u6001\u7684\u3001\u6700\u7EC8\u7684\u3001\u540C\u6B65\u7684\uFF0C\u4E5F\u5C31\u662F\u8BF4\uFF0C\u6784\u9020\u65B9\u6CD5\u4E0D\u80FD\u901A\u8FC7 abstract\u3001static\u3001final\u3001synchronized \u5173\u952E\u5B57\u4FEE\u9970\u3002</li></ul><p>\u7B80\u5355\u89E3\u6790\u4E00\u4E0B\u6700\u540E\u4E00\u6761\u89C4\u5219\u3002</p><ul><li>\u7531\u4E8E\u6784\u9020\u65B9\u6CD5\u4E0D\u80FD\u88AB\u5B50\u7C7B\u7EE7\u627F\uFF0C\u6240\u4EE5\u7528 final \u548C abstract \u4FEE\u9970\u6CA1\u6709\u610F\u4E49\uFF1B</li><li>\u6784\u9020\u65B9\u6CD5\u7528\u4E8E\u521D\u59CB\u5316\u4E00\u4E2A\u5BF9\u8C61\uFF0C\u6240\u4EE5\u7528 static \u4FEE\u9970\u6CA1\u6709\u610F\u4E49\uFF1B</li><li>\u591A\u4E2A\u7EBF\u7A0B\u4E0D\u4F1A\u540C\u65F6\u521B\u5EFA\u5185\u5B58\u5730\u5740\u76F8\u540C\u7684\u540C\u4E00\u4E2A\u5BF9\u8C61\uFF0C\u6240\u4EE5\u7528 synchronized \u4FEE\u9970\u6CA1\u6709\u5FC5\u8981\u3002</li></ul><p>\u6784\u9020\u65B9\u6CD5\u7684\u8BED\u6CD5\u683C\u5F0F\u5982\u4E0B\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">class</span> class_name <span class="token punctuation">{</span>
     <span class="token keyword">public</span> <span class="token function">class_name</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">{</span><span class="token punctuation">}</span>    <span class="token comment">// \u9ED8\u8BA4\u65E0\u53C2\u6784\u9020\u65B9\u6CD5</span>
     <span class="token keyword">public</span> <span class="token function">ciass_name</span><span class="token punctuation">(</span><span class="token punctuation">[</span>paramList<span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">{</span><span class="token punctuation">}</span>    <span class="token comment">// \u5B9A\u4E49\u6709\u53C2\u6570\u5217\u8868\u7684\u6784\u9020\u65B9\u6CD5</span>
     \u2026
diff --git a/dist/assets/cors.html.32e975b9.js b/dist/assets/cors.html.b1e575b3.js
similarity index 99%
rename from dist/assets/cors.html.32e975b9.js
rename to dist/assets/cors.html.b1e575b3.js
index 200a6157..b5e2b2bf 100644
--- a/dist/assets/cors.html.32e975b9.js
+++ b/dist/assets/cors.html.b1e575b3.js
@@ -1,4 +1,4 @@
-import{_ as t}from"./plugin-vue_export-helper.21dcd24c.js";import{r as o,o as p,c as i,a as n,b as e,d as s,e as c}from"./app.a0271b9c.js";const l={},r=n("h2",{id:"\u524D\u540E\u7AEF\u5206\u79BB\u9879\u76EE-\u5982\u4F55\u89E3\u51B3\u8DE8\u57DF\u95EE\u9898",tabindex:"-1"},[n("a",{class:"header-anchor",href:"#\u524D\u540E\u7AEF\u5206\u79BB\u9879\u76EE-\u5982\u4F55\u89E3\u51B3\u8DE8\u57DF\u95EE\u9898","aria-hidden":"true"},"#"),s(" \u524D\u540E\u7AEF\u5206\u79BB\u9879\u76EE\uFF0C\u5982\u4F55\u89E3\u51B3\u8DE8\u57DF\u95EE\u9898\uFF1F")],-1),u=s("\u8DE8\u57DF\u95EE\u9898\u662F\u524D\u540E\u7AEF\u5206\u79BB\u9879\u76EE\u4E2D\u975E\u5E38\u5E38\u89C1\u7684\u4E00\u4E2A\u95EE\u9898\uFF0C\u4E3E\u4F8B\u6765\u8BF4\uFF0C\u7F16\u7A0B\u732B\uFF08"),d={href:"https://github.com/itwanger/coding-more",target:"_blank",rel:"noopener noreferrer"},v=s("codingmore"),m=s("\uFF09\u5B66\u4E60\u7F51\u7AD9\u7684\u524D\u7AEF\u670D\u52A1\u8DD1\u5728 8080 \u7AEF\u53E3\u4E0B\uFF0C\u540E\u7AEF\u670D\u52A1\u8DD1\u5728 9002 \u7AEF\u53E3\u4E0B\uFF0C\u90A3\u4E48\u524D\u7AEF\u5728\u8BF7\u6C42\u540E\u7AEF\u63A5\u53E3\u7684\u65F6\u5019\u5C31\u4F1A\u51FA\u73B0\u8DE8\u57DF\u95EE\u9898\u3002"),b=n("p",null,[n("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/cors-1.png",alt:""})],-1),k=n("p",null,"403 Forbidden \u662FHTTP\u534F\u8BAE\u4E2D\u7684\u4E00\u4E2A\u72B6\u6001\u7801\uFF08Status Code\uFF09\uFF0C\u610F\u5473\u7740\u540E\u7AEF\u670D\u52A1\u867D\u7136\u6210\u529F\u89E3\u6790\u4E86\u8BF7\u6C42\uFF0C\u4F46\u524D\u7AEF\u5374\u6CA1\u6709\u8BBF\u95EE\u8BE5\u8D44\u6E90\u7684\u6743\u9650\u3002",-1),g=n("p",null,"\u90A3\u600E\u4E48\u89E3\u51B3\u8FD9\u4E2A\u95EE\u9898\u5462\uFF1F\u901A\u5E38\u6709\u4E24\u4E2A\u601D\u8DEF\uFF1A",-1),h=n("ul",null,[n("li",null,"\u524D\u7AEF\u4F7F\u7528 Nodejs \u4EE3\u7406\uFF08\u5F00\u53D1\u73AF\u5883\u4E0B\uFF0C\u751F\u4EA7\u73AF\u5883\u4E0B\u53EF\u4EE5\u7528 Nginx \u66FF\u4EE3\uFF09"),n("li",null,"\u6216\u8005\u540E\u7AEF\u5F00\u542F\u8DE8\u57DF\u8D44\u6E90\u5171\u4EAB")],-1),_=n("h3",{id:"\u4E00\u3001\u5173\u4E8E\u8DE8\u57DF",tabindex:"-1"},[n("a",{class:"header-anchor",href:"#\u4E00\u3001\u5173\u4E8E\u8DE8\u57DF","aria-hidden":"true"},"#"),s(" \u4E00\u3001\u5173\u4E8E\u8DE8\u57DF")],-1),f=n("p",null,"\u8DE8\u57DF\u5BF9\u4E8E\u524D\u540E\u7AEF\u5F00\u53D1\u8005\u6765\u8BF4\uFF0C\u5C31\u50CF\u4E00\u5757\u72D7\u76AE\u818F\u836F\uFF0C\u65E0\u8BBA\u662F\u9762\u8BD5\u8FD8\u662F\u5F00\u53D1\u4E2D\uFF0C\u90FD\u4F1A\u7ECF\u5E38\u9047\u5230\u3002",-1),j=s("\u4E4B\u6240\u4EE5\u51FA\u73B0\u8DE8\u57DF\u95EE\u9898\uFF0C\u662F\u56E0\u4E3A"),S={href:"https://developer.mozilla.org/zh-CN/docs/Web/Security/Same-origin_policy",target:"_blank",rel:"noopener 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   dev: {
     // Paths
     assetsSubDirectory: &#39;static&#39;,
diff --git a/dist/assets/cpu-percent-100.html.3a56db8e.js b/dist/assets/cpu-percent-100.html.30d9234e.js
similarity index 99%
rename from dist/assets/cpu-percent-100.html.3a56db8e.js
rename to dist/assets/cpu-percent-100.html.30d9234e.js
index 62eeefed..0f51d860 100644
--- a/dist/assets/cpu-percent-100.html.3a56db8e.js
+++ b/dist/assets/cpu-percent-100.html.30d9234e.js
@@ -1 +1 @@
-import{_ as r}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o as d,c as i,a as e,b as c,e as a,d as t}from"./app.a0271b9c.js";const s={},n=a('<h1 id="\u4E00\u6B21\u751F\u4EA7cpu-100-\u6392\u67E5\u4F18\u5316\u5B9E\u8DF5" tabindex="-1"><a class="header-anchor" href="#\u4E00\u6B21\u751F\u4EA7cpu-100-\u6392\u67E5\u4F18\u5316\u5B9E\u8DF5" aria-hidden="true">#</a> \u4E00\u6B21\u751F\u4EA7CPU 100% \u6392\u67E5\u4F18\u5316\u5B9E\u8DF5</h1><h2 id="\u524D\u8A00" tabindex="-1"><a class="header-anchor" href="#\u524D\u8A00" aria-hidden="true">#</a> \u524D\u8A00</h2><p>\u6700\u8FD1\u53C8\u6536\u5230\u4E86\u8FD0\u7EF4\u62A5\u8B66\uFF1A\u8868\u793A\u6709\u4E9B\u670D\u52A1\u5668\u8D1F\u8F7D\u975E\u5E38\u9AD8\uFF0C\u8BA9\u6211\u4EEC\u5B9A\u4F4D\u95EE\u9898\u3002</p><h2 id="\u5B9A\u4F4D\u95EE\u9898" tabindex="-1"><a class="header-anchor" href="#\u5B9A\u4F4D\u95EE\u9898" aria-hidden="true">#</a> \u5B9A\u4F4D\u95EE\u9898</h2><p>\u62FF\u5230\u95EE\u9898\u540E\u9996\u5148\u53BB\u670D\u52A1\u5668\u4E0A\u770B\u4E86\u770B\uFF0C\u53D1\u73B0\u8FD0\u884C\u7684\u53EA\u6709\u6211\u4EEC\u7684 Java \u5E94\u7528\u3002\u4E8E\u662F\u5148\u7528 <code>ps</code> \u547D\u4EE4\u62FF\u5230\u4E86\u5E94\u7528\u7684 <code>PID</code>\u3002</p><p>\u63A5\u7740\u4F7F\u7528 <code>top -Hp pid</code> \u5C06\u8FD9\u4E2A\u8FDB\u7A0B\u7684\u7EBF\u7A0B\u663E\u793A\u51FA\u6765\u3002\u8F93\u5165\u5927\u5199\u7684 P \u53EF\u4EE5\u5C06\u7EBF\u7A0B\u6309\u7167 CPU \u4F7F\u7528\u6BD4\u4F8B\u6392\u5E8F\uFF0C\u4E8E\u662F\u5F97\u5230\u4EE5\u4E0B\u7ED3\u679C\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/cpu-percent-100-e9b35104-fce9-40ea-ae91-8bbb7fd8aa96.jpg" alt=""></p><p>\u679C\u7136\u67D0\u4E9B\u7EBF\u7A0B\u7684 CPU \u4F7F\u7528\u7387\u975E\u5E38\u9AD8\u3002</p><p>\u4E3A\u4E86\u65B9\u4FBF\u5B9A\u4F4D\u95EE\u9898\u6211\u7ACB\u9A6C\u4F7F\u7528 <code>jstack pid &gt; pid.log</code> \u5C06\u7EBF\u7A0B\u6808 <code>dump</code> \u5230\u65E5\u5FD7\u6587\u4EF6\u4E2D\u3002</p><p>\u6211\u5728\u4E0A\u9762 100% \u7684\u7EBF\u7A0B\u4E2D\u968F\u673A\u9009\u4E86\u4E00\u4E2A <code>pid=194283</code> \u8F6C\u6362\u4E3A 16 \u8FDB\u5236\uFF082f6eb\uFF09\u540E\u5728\u7EBF\u7A0B\u5FEB\u7167\u4E2D\u67E5\u8BE2\uFF1A</p><blockquote><p>\u56E0\u4E3A\u7EBF\u7A0B\u5FEB\u7167\u4E2D\u7EBF\u7A0B ID \u90FD\u662F16\u8FDB\u5236\u5B58\u653E\u3002</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/cpu-percent-100-f8b051d5-f28d-481e-a0b2-e97151797e3b.jpg" alt=""></p>',12),b=t("\u53D1\u73B0\u8FD9\u662F "),h=e("code",null,"Disruptor",-1),l=t(" \u7684\u4E00\u4E2A\u5806\u6808\uFF0C\u524D\u6BB5\u65F6\u95F4\u6B63\u597D\u89E3\u51B3\u8FC7\u4E00\u4E2A\u7531\u4E8E Disruptor \u961F\u5217\u5F15\u8D77\u7684\u4E00\u6B21 "),m=e("a",{href:""},"OOM",-1),g=t("\uFF1A"),u={href:"https://crossoverjie.top/2018/08/29/java-senior/OOM-Disruptor/",target:"_blank",rel:"noopener noreferrer"},j=t("\u5F3A\u5982 Disruptor \u4E5F\u53D1\u751F\u5185\u5B58\u6EA2\u51FA\uFF1F"),v=e("p",null,"\u6CA1\u60F3\u5230\u53C8\u6765\u4E00\u51FA\u3002",-1),f=e("p",null,"\u4E3A\u4E86\u66F4\u52A0\u76F4\u89C2\u7684\u67E5\u770B\u7EBF\u7A0B\u7684\u72B6\u6001\u4FE1\u606F\uFF0C\u6211\u5C06\u5FEB\u7167\u4FE1\u606F\u4E0A\u4F20\u5230\u4E13\u95E8\u5206\u6790\u7684\u5E73\u53F0\u4E0A\u3002",-1),_={href:"http://fastthread.io/",target:"_blank",rel:"noopener noreferrer"},C=t("http://fastthread.io/"),P=a('<p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/cpu-percent-100-d6c9bc1c-9600-47f2-9ff1-d0c9bd8ef849.jpg" alt=""></p><p>\u5176\u4E2D\u6709\u4E00\u9879\u83DC\u5355\u5C55\u793A\u4E86\u6240\u6709\u6D88\u8017 CPU \u7684\u7EBF\u7A0B\uFF0C\u6211\u4ED4\u7EC6\u770B\u4E86\u4E0B\u53D1\u73B0\u51E0\u4E4E\u90FD\u662F\u548C\u4E0A\u9762\u7684\u5806\u6808\u4E00\u6837\u3002</p><p>\u4E5F\u5C31\u662F\u8BF4\u90FD\u662F <code>Disruptor</code> \u961F\u5217\u7684\u5806\u6808\uFF0C\u540C\u65F6\u90FD\u5728\u6267\u884C <code>java.lang.Thread.yield</code> \u51FD\u6570\u3002</p><p>\u4F17\u6240\u5468\u77E5 <code>yield</code> \u51FD\u6570\u4F1A\u8BA9\u5F53\u524D\u7EBF\u7A0B\u8BA9\u51FA <code>CPU</code> \u8D44\u6E90\uFF0C\u518D\u8BA9\u5176\u4ED6\u7EBF\u7A0B\u6765\u7ADE\u4E89\u3002</p><p>\u6839\u636E\u521A\u624D\u7684\u7EBF\u7A0B\u5FEB\u7167\u53D1\u73B0\u5904\u4E8E <code>RUNNABLE</code> \u72B6\u6001\u5E76\u4E14\u90FD\u5728\u6267\u884C <code>yield</code> \u51FD\u6570\u7684\u7EBF\u7A0B\u5927\u6982\u6709 30\u51E0\u4E2A\u3002</p><p>\u56E0\u6B64\u521D\u6B65\u5224\u65AD\u4E3A\u5927\u91CF\u7EBF\u7A0B\u6267\u884C <code>yield</code> \u51FD\u6570\u4E4B\u540E\u4E92\u76F8\u7ADE\u4E89\u5BFC\u81F4 CPU \u4F7F\u7528\u7387\u589E\u9AD8\uFF0C\u800C\u901A\u8FC7\u5BF9\u5806\u6808\u53D1\u73B0\u662F\u548C\u4F7F\u7528 <code>Disruptor</code> \u6709\u5173\u3002</p><h2 id="\u89E3\u51B3\u95EE\u9898" tabindex="-1"><a class="header-anchor" href="#\u89E3\u51B3\u95EE\u9898" aria-hidden="true">#</a> \u89E3\u51B3\u95EE\u9898</h2><p>\u800C\u540E\u6211\u67E5\u770B\u4E86\u4EE3\u7801\uFF0C\u53D1\u73B0\u662F\u6839\u636E\u6BCF\u4E00\u4E2A\u4E1A\u52A1\u573A\u666F\u5728\u5185\u90E8\u90FD\u4F1A\u4F7F\u7528 2 \u4E2A <code>Disruptor</code> \u961F\u5217\u6765\u89E3\u8026\u3002</p><p>\u5047\u8BBE\u73B0\u5728\u6709 7 \u4E2A\u4E1A\u52A1\u7C7B\u578B\uFF0C\u90A3\u5C31\u7B49\u4E8E\u662F\u521B\u5EFA <code>2*7=14</code> \u4E2A <code>Disruptor</code> \u961F\u5217\uFF0C\u540C\u65F6\u6BCF\u4E2A\u961F\u5217\u6709\u4E00\u4E2A\u6D88\u8D39\u8005\uFF0C\u4E5F\u5C31\u662F\u603B\u5171\u6709 14 \u4E2A\u6D88\u8D39\u8005\uFF08\u751F\u4EA7\u73AF\u5883\u66F4\u591A\uFF09\u3002</p><p>\u540C\u65F6\u53D1\u73B0\u914D\u7F6E\u7684\u6D88\u8D39\u7B49\u5F85\u7B56\u7565\u4E3A <code>YieldingWaitStrategy</code> \u8FD9\u79CD\u7B49\u5F85\u7B56\u7565\u786E\u5B9E\u4F1A\u6267\u884C yield \u6765\u8BA9\u51FA CPU\u3002</p><p>\u4EE3\u7801\u5982\u4E0B\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/cpu-percent-100-49840c0d-2c10-4bcb-80c6-1df7553ddb6c.jpg" alt=""></p><blockquote><p>\u521D\u6B65\u770B\u6765\u548C\u8FD9\u4E2A\u7B49\u5F85\u7B56\u7565\u6709\u5F88\u5927\u7684\u5173\u7CFB\u3002</p></blockquote><h3 id="\u672C\u5730\u6A21\u62DF" tabindex="-1"><a class="header-anchor" href="#\u672C\u5730\u6A21\u62DF" aria-hidden="true">#</a> \u672C\u5730\u6A21\u62DF</h3><p>\u4E3A\u4E86\u9A8C\u8BC1\uFF0C\u6211\u5728\u672C\u5730\u521B\u5EFA\u4E86 15 \u4E2A <code>Disruptor</code> \u961F\u5217\u540C\u65F6\u7ED3\u5408\u76D1\u63A7\u89C2\u5BDF CPU \u7684\u4F7F\u7528\u60C5\u51B5\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/cpu-percent-100-7f3b2fa6-6505-4b67-9f42-0170a236832b.jpg" alt=""><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/cpu-percent-100-d597089d-54e0-49ef-a0f9-41798e84de48.jpg" alt=""></p><p>\u521B\u5EFA\u4E86 15 \u4E2A <code>Disruptor</code> \u961F\u5217\uFF0C\u540C\u65F6\u6BCF\u4E2A\u961F\u5217\u90FD\u7528\u7EBF\u7A0B\u6C60\u6765\u5F80 <code>Disruptor\u961F\u5217</code> \u91CC\u9762\u53D1\u9001 100W \u6761\u6570\u636E\u3002</p><p>\u6D88\u8D39\u7A0B\u5E8F\u4EC5\u4EC5\u53EA\u662F\u6253\u5370\u4E00\u4E0B\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/cpu-percent-100-97b88b4d-2d81-47ab-9beb-830ac122c282.jpg" alt=""></p><p>\u8DD1\u4E86\u4E00\u6BB5\u65F6\u95F4\u53D1\u73B0 CPU \u4F7F\u7528\u7387\u786E\u5B9E\u5F88\u9AD8\u3002</p><hr><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/cpu-percent-100-c0ee1da2-29af-4581-b0d8-97f6250401e7.jpg" alt=""></p><p>\u540C\u65F6 <code>dump</code> \u7EBF\u7A0B\u53D1\u73B0\u548C\u751F\u4EA7\u7684\u73B0\u8C61\u4E5F\u662F\u4E00\u81F4\u7684\uFF1A\u6D88\u8D39\u7EBF\u7A0B\u90FD\u5904\u4E8E <code>RUNNABLE</code> \u72B6\u6001\uFF0C\u540C\u65F6\u90FD\u5728\u6267\u884C <code>yield</code>\u3002</p><p>\u901A\u8FC7\u67E5\u8BE2 <code>Disruptor</code> \u5B98\u65B9\u6587\u6863\u53D1\u73B0\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/cpu-percent-100-de904a90-8b59-4333-82f5-9ec94a6525a0.jpg" alt=""></p><blockquote><p>YieldingWaitStrategy \u662F\u4E00\u79CD\u5145\u5206\u538B\u69A8 CPU \u7684\u7B56\u7565\uFF0C\u4F7F\u7528<code>\u81EA\u65CB + yield</code>\u7684\u65B9\u5F0F\u6765\u63D0\u9AD8\u6027\u80FD\u3002 \u5F53\u6D88\u8D39\u7EBF\u7A0B\uFF08Event Handler threads\uFF09\u7684\u6570\u91CF\u5C0F\u4E8E CPU \u6838\u5FC3\u6570\u65F6\u63A8\u8350\u4F7F\u7528\u8BE5\u7B56\u7565\u3002</p></blockquote><hr><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/cpu-percent-100-3faf6f7e-0d2c-4cfe-8e3a-07e15601485d.jpg" alt=""></p><p>\u540C\u65F6\u67E5\u9605\u5230\u5176\u4ED6\u7684\u7B49\u5F85\u7B56\u7565 <code>BlockingWaitStrategy</code> \uFF08\u4E5F\u662F\u9ED8\u8BA4\u7684\u7B56\u7565\uFF09\uFF0C\u5B83\u4F7F\u7528\u7684\u662F\u9501\u7684\u673A\u5236\uFF0C\u5BF9 CPU \u7684\u4F7F\u7528\u7387\u4E0D\u9AD8\u3002</p><p>\u4E8E\u662F\u5728\u548C\u4E4B\u524D\u540C\u6837\u7684\u6761\u4EF6\u4E0B\u5C06\u7B49\u5F85\u7B56\u7565\u6362\u4E3A <code>BlockingWaitStrategy</code>\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/cpu-percent-100-12912ce3-a702-4bb2-a19b-816c22f7d43a.jpg" alt=""></p><hr><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/cpu-percent-100-b4aad83e-af9d-48fc-bcd0-ad2a42588179.jpg" alt=""><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/cpu-percent-100-56dc1513-8f10-422f-bb2a-ae5dcfb8413f.jpg" alt=""></p><p>\u548C\u521A\u624D\u7684 CPU \u5BF9\u6BD4\u4F1A\u53D1\u73B0\u5230\u540E\u9762\u4F7F\u7528\u7387\u7684\u4F1A\u6709\u660E\u663E\u7684\u964D\u4F4E\uFF1B\u540C\u65F6 dump \u7EBF\u7A0B\u540E\u4F1A\u53D1\u73B0\u5927\u90E8\u5206\u7EBF\u7A0B\u90FD\u5904\u4E8E waiting \u72B6\u6001\u3002</p><h3 id="\u4F18\u5316\u89E3\u51B3" tabindex="-1"><a class="header-anchor" href="#\u4F18\u5316\u89E3\u51B3" aria-hidden="true">#</a> \u4F18\u5316\u89E3\u51B3</h3><p>\u770B\u6837\u5B50\u5C06\u7B49\u5F85\u7B56\u7565\u6362\u4E3A <code>BlockingWaitStrategy</code> \u53EF\u4EE5\u51CF\u7F13 CPU \u7684\u4F7F\u7528\uFF0C</p><p>\u4F46\u7559\u610F\u5230\u5B98\u65B9\u5BF9 <code>YieldingWaitStrategy</code> \u7684\u63CF\u8FF0\u91CC\u8C08\u9053\uFF1A \u5F53\u6D88\u8D39\u7EBF\u7A0B\uFF08Event Handler threads\uFF09\u7684\u6570\u91CF\u5C0F\u4E8E CPU \u6838\u5FC3\u6570\u65F6\u63A8\u8350\u4F7F\u7528\u8BE5\u7B56\u7565\u3002</p><p>\u800C\u73B0\u6709\u7684\u4F7F\u7528\u573A\u666F\u5F88\u660E\u663E\u6D88\u8D39\u7EBF\u7A0B\u6570\u5DF2\u7ECF\u5927\u5927\u7684\u8D85\u8FC7\u4E86\u6838\u5FC3 CPU \u6570\u4E86\uFF0C\u56E0\u4E3A\u6211\u7684\u4F7F\u7528\u65B9\u5F0F\u662F\u4E00\u4E2A <code>Disruptor</code> \u961F\u5217\u4E00\u4E2A\u6D88\u8D39\u8005\uFF0C\u6240\u4EE5\u6211\u5C06\u961F\u5217\u8C03\u6574\u4E3A\u53EA\u6709 1 \u4E2A\u518D\u8BD5\u8BD5(\u7B56\u7565\u4F9D\u7136\u662F <code>YieldingWaitStrategy</code>)\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/cpu-percent-100-b1cbc2c2-828a-46e8-ba14-86cd0fa660c6.jpg" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/cpu-percent-100-f8fb7682-a61a-407d-923c-890a16bce109.jpg" alt=""></p><p>\u8DD1\u4E86\u4E00\u5206\u949F\uFF0C\u53D1\u73B0 CPU \u7684\u4F7F\u7528\u7387\u4E00\u76F4\u90FD\u6BD4\u8F83\u5E73\u7A33\u800C\u4E14\u4E0D\u9AD8\u3002</p><h2 id="\u603B\u7ED3" tabindex="-1"><a class="header-anchor" href="#\u603B\u7ED3" aria-hidden="true">#</a> \u603B\u7ED3</h2><p>\u6240\u4EE5\u6392\u67E5\u5230\u6B64\u53EF\u4EE5\u6709\u4E00\u4E2A\u7ED3\u8BBA\u4E86\uFF0C\u60F3\u8981\u6839\u672C\u89E3\u51B3\u8FD9\u4E2A\u95EE\u9898\u9700\u8981\u5C06\u6211\u4EEC\u73B0\u6709\u7684\u4E1A\u52A1\u62C6\u5206\uFF1B\u73B0\u5728\u662F\u4E00\u4E2A\u5E94\u7528\u91CC\u540C\u65F6\u5904\u7406\u4E86 N \u4E2A\u4E1A\u52A1\uFF0C\u6BCF\u4E2A\u4E1A\u52A1\u90FD\u4F1A\u4F7F\u7528\u597D\u51E0\u4E2A <code>Disruptor</code> \u961F\u5217\u3002</p><p>\u7531\u4E8E\u662F\u5728\u4E00\u53F0\u670D\u52A1\u5668\u4E0A\u8FD0\u884C\uFF0C\u6240\u4EE5 CPU \u8D44\u6E90\u90FD\u662F\u5171\u4EAB\u7684\uFF0C\u8FD9\u5C31\u4F1A\u5BFC\u81F4 CPU \u7684\u4F7F\u7528\u7387\u5C45\u9AD8\u4E0D\u4E0B\u3002</p><p>\u6240\u4EE5\u6211\u4EEC\u7684\u8C03\u6574\u65B9\u5F0F\u5982\u4E0B\uFF1A</p><ul><li>\u4E3A\u4E86\u5FEB\u901F\u7F13\u89E3\u8FD9\u4E2A\u95EE\u9898\uFF0C\u5148\u5C06\u7B49\u5F85\u7B56\u7565\u6362\u4E3A <code>BlockingWaitStrategy</code>\uFF0C\u53EF\u4EE5\u6709\u6548\u964D\u4F4E CPU \u7684\u4F7F\u7528\u7387\uFF08\u4E1A\u52A1\u4E0A\u4E5F\u8FD8\u80FD\u63A5\u53D7\uFF09\u3002</li><li>\u7B2C\u4E8C\u6B65\u5C31\u9700\u8981\u5C06\u5E94\u7528\u62C6\u5206\uFF08\u4E0A\u6587\u6A21\u62DF\u7684\u4E00\u4E2A <code>Disruptor</code> \u961F\u5217\uFF09\uFF0C\u4E00\u4E2A\u5E94\u7528\u5904\u7406\u4E00\u79CD\u4E1A\u52A1\u7C7B\u578B\uFF1B\u7136\u540E\u5206\u522B\u5355\u72EC\u90E8\u7F72\uFF0C\u8FD9\u6837\u4E5F\u53EF\u4EE5\u4E92\u76F8\u9694\u79BB\u4E92\u4E0D\u5F71\u54CD\u3002</li></ul><p>\u5F53\u7136\u8FD8\u6709\u5176\u4ED6\u7684\u4E00\u4E9B\u4F18\u5316\uFF0C\u56E0\u4E3A\u8FD9\u4E5F\u662F\u4E00\u4E2A\u8001\u7CFB\u7EDF\u4E86\uFF0C\u8FD9\u6B21 dump \u7EBF\u7A0B\u5C45\u7136\u53D1\u73B0\u521B\u5EFA\u4E86 800+ \u7684\u7EBF\u7A0B\u3002</p><p>\u521B\u5EFA\u7EBF\u7A0B\u6C60\u7684\u65B9\u5F0F\u4E5F\u662F\u6838\u5FC3\u7EBF\u7A0B\u6570\u3001\u6700\u5927\u7EBF\u7A0B\u6570\u662F\u4E00\u6837\u7684\uFF0C\u5BFC\u81F4\u4E00\u4E9B\u7A7A\u95F2\u7684\u7EBF\u7A0B\u4E5F\u5F97\u4E0D\u5230\u56DE\u6536\uFF1B\u8FD9\u6837\u4F1A\u6709\u5F88\u591A\u65E0\u610F\u4E49\u7684\u8D44\u6E90\u6D88\u8017\u3002</p><p>\u6240\u4EE5\u4E5F\u4F1A\u7ED3\u5408\u4E1A\u52A1\u5C06\u521B\u5EFA\u7EBF\u7A0B\u6C60\u7684\u65B9\u5F0F\u8C03\u6574\u4E00\u4E0B\uFF0C\u5C06\u7EBF\u7A0B\u6570\u964D\u4E0B\u6765\uFF0C\u5C3D\u91CF\u7684\u7269\u5C3D\u5176\u7528\u3002</p><p>\u672C\u6587\u7684\u6F14\u793A\u4EE3\u7801\u5DF2\u4E0A\u4F20\u81F3 GitHub\uFF1A</p>',50),U={href:"https://github.com/crossoverJie/JCSprout/tree/master/src/main/java/com/crossoverjie/disruptor",target:"_blank",rel:"noopener noreferrer"},k=t("https://github.com/crossoverJie/JCSprout"),D=e("p",null,[e("strong",null,"\u4F60\u7684\u70B9\u8D5E\u4E0E\u5206\u4EAB\u662F\u5BF9\u6211\u6700\u5927\u7684\u652F\u6301")],-1),y=t("\u539F\u6587\u94FE\u63A5\uFF1A"),x={href:"https://github.com/crossoverJie/JCSprout/blob/master/docs/jvm/cpu-percent-100.md",target:"_blank",rel:"noopener noreferrer"},S=t("https://github.com/crossoverJie/JCSprout/blob/master/docs/jvm/cpu-percent-100.md"),B=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png",alt:""})],-1);function J(N,W){const o=p("ExternalLinkIcon");return d(),i("div",null,[n,e("p",null,[b,h,l,m,g,e("a",u,[j,c(o)])]),v,f,e("p",null,[e("a",_,[C,c(o)])]),P,e("p",null,[e("a",U,[k,c(o)])]),D,e("p",null,[y,e("a",x,[S,c(o)])]),B])}var H=r(s,[["render",J],["__file","cpu-percent-100.html.vue"]]);export{H as default};
+import{_ as r}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o as d,c as i,a as e,b as c,e as a,d as t}from"./app.615e41d8.js";const s={},n=a('<h1 id="\u4E00\u6B21\u751F\u4EA7cpu-100-\u6392\u67E5\u4F18\u5316\u5B9E\u8DF5" tabindex="-1"><a class="header-anchor" href="#\u4E00\u6B21\u751F\u4EA7cpu-100-\u6392\u67E5\u4F18\u5316\u5B9E\u8DF5" aria-hidden="true">#</a> \u4E00\u6B21\u751F\u4EA7CPU 100% \u6392\u67E5\u4F18\u5316\u5B9E\u8DF5</h1><h2 id="\u524D\u8A00" tabindex="-1"><a class="header-anchor" href="#\u524D\u8A00" aria-hidden="true">#</a> \u524D\u8A00</h2><p>\u6700\u8FD1\u53C8\u6536\u5230\u4E86\u8FD0\u7EF4\u62A5\u8B66\uFF1A\u8868\u793A\u6709\u4E9B\u670D\u52A1\u5668\u8D1F\u8F7D\u975E\u5E38\u9AD8\uFF0C\u8BA9\u6211\u4EEC\u5B9A\u4F4D\u95EE\u9898\u3002</p><h2 id="\u5B9A\u4F4D\u95EE\u9898" tabindex="-1"><a class="header-anchor" href="#\u5B9A\u4F4D\u95EE\u9898" aria-hidden="true">#</a> \u5B9A\u4F4D\u95EE\u9898</h2><p>\u62FF\u5230\u95EE\u9898\u540E\u9996\u5148\u53BB\u670D\u52A1\u5668\u4E0A\u770B\u4E86\u770B\uFF0C\u53D1\u73B0\u8FD0\u884C\u7684\u53EA\u6709\u6211\u4EEC\u7684 Java \u5E94\u7528\u3002\u4E8E\u662F\u5148\u7528 <code>ps</code> \u547D\u4EE4\u62FF\u5230\u4E86\u5E94\u7528\u7684 <code>PID</code>\u3002</p><p>\u63A5\u7740\u4F7F\u7528 <code>top -Hp pid</code> \u5C06\u8FD9\u4E2A\u8FDB\u7A0B\u7684\u7EBF\u7A0B\u663E\u793A\u51FA\u6765\u3002\u8F93\u5165\u5927\u5199\u7684 P \u53EF\u4EE5\u5C06\u7EBF\u7A0B\u6309\u7167 CPU \u4F7F\u7528\u6BD4\u4F8B\u6392\u5E8F\uFF0C\u4E8E\u662F\u5F97\u5230\u4EE5\u4E0B\u7ED3\u679C\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/cpu-percent-100-e9b35104-fce9-40ea-ae91-8bbb7fd8aa96.jpg" alt=""></p><p>\u679C\u7136\u67D0\u4E9B\u7EBF\u7A0B\u7684 CPU \u4F7F\u7528\u7387\u975E\u5E38\u9AD8\u3002</p><p>\u4E3A\u4E86\u65B9\u4FBF\u5B9A\u4F4D\u95EE\u9898\u6211\u7ACB\u9A6C\u4F7F\u7528 <code>jstack pid &gt; pid.log</code> \u5C06\u7EBF\u7A0B\u6808 <code>dump</code> \u5230\u65E5\u5FD7\u6587\u4EF6\u4E2D\u3002</p><p>\u6211\u5728\u4E0A\u9762 100% \u7684\u7EBF\u7A0B\u4E2D\u968F\u673A\u9009\u4E86\u4E00\u4E2A <code>pid=194283</code> \u8F6C\u6362\u4E3A 16 \u8FDB\u5236\uFF082f6eb\uFF09\u540E\u5728\u7EBF\u7A0B\u5FEB\u7167\u4E2D\u67E5\u8BE2\uFF1A</p><blockquote><p>\u56E0\u4E3A\u7EBF\u7A0B\u5FEB\u7167\u4E2D\u7EBF\u7A0B ID \u90FD\u662F16\u8FDB\u5236\u5B58\u653E\u3002</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/cpu-percent-100-f8b051d5-f28d-481e-a0b2-e97151797e3b.jpg" alt=""></p>',12),b=t("\u53D1\u73B0\u8FD9\u662F "),h=e("code",null,"Disruptor",-1),l=t(" \u7684\u4E00\u4E2A\u5806\u6808\uFF0C\u524D\u6BB5\u65F6\u95F4\u6B63\u597D\u89E3\u51B3\u8FC7\u4E00\u4E2A\u7531\u4E8E Disruptor \u961F\u5217\u5F15\u8D77\u7684\u4E00\u6B21 "),m=e("a",{href:""},"OOM",-1),g=t("\uFF1A"),u={href:"https://crossoverjie.top/2018/08/29/java-senior/OOM-Disruptor/",target:"_blank",rel:"noopener noreferrer"},j=t("\u5F3A\u5982 Disruptor \u4E5F\u53D1\u751F\u5185\u5B58\u6EA2\u51FA\uFF1F"),v=e("p",null,"\u6CA1\u60F3\u5230\u53C8\u6765\u4E00\u51FA\u3002",-1),f=e("p",null,"\u4E3A\u4E86\u66F4\u52A0\u76F4\u89C2\u7684\u67E5\u770B\u7EBF\u7A0B\u7684\u72B6\u6001\u4FE1\u606F\uFF0C\u6211\u5C06\u5FEB\u7167\u4FE1\u606F\u4E0A\u4F20\u5230\u4E13\u95E8\u5206\u6790\u7684\u5E73\u53F0\u4E0A\u3002",-1),_={href:"http://fastthread.io/",target:"_blank",rel:"noopener noreferrer"},C=t("http://fastthread.io/"),P=a('<p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/cpu-percent-100-d6c9bc1c-9600-47f2-9ff1-d0c9bd8ef849.jpg" alt=""></p><p>\u5176\u4E2D\u6709\u4E00\u9879\u83DC\u5355\u5C55\u793A\u4E86\u6240\u6709\u6D88\u8017 CPU \u7684\u7EBF\u7A0B\uFF0C\u6211\u4ED4\u7EC6\u770B\u4E86\u4E0B\u53D1\u73B0\u51E0\u4E4E\u90FD\u662F\u548C\u4E0A\u9762\u7684\u5806\u6808\u4E00\u6837\u3002</p><p>\u4E5F\u5C31\u662F\u8BF4\u90FD\u662F <code>Disruptor</code> \u961F\u5217\u7684\u5806\u6808\uFF0C\u540C\u65F6\u90FD\u5728\u6267\u884C <code>java.lang.Thread.yield</code> \u51FD\u6570\u3002</p><p>\u4F17\u6240\u5468\u77E5 <code>yield</code> \u51FD\u6570\u4F1A\u8BA9\u5F53\u524D\u7EBF\u7A0B\u8BA9\u51FA <code>CPU</code> \u8D44\u6E90\uFF0C\u518D\u8BA9\u5176\u4ED6\u7EBF\u7A0B\u6765\u7ADE\u4E89\u3002</p><p>\u6839\u636E\u521A\u624D\u7684\u7EBF\u7A0B\u5FEB\u7167\u53D1\u73B0\u5904\u4E8E <code>RUNNABLE</code> \u72B6\u6001\u5E76\u4E14\u90FD\u5728\u6267\u884C <code>yield</code> \u51FD\u6570\u7684\u7EBF\u7A0B\u5927\u6982\u6709 30\u51E0\u4E2A\u3002</p><p>\u56E0\u6B64\u521D\u6B65\u5224\u65AD\u4E3A\u5927\u91CF\u7EBF\u7A0B\u6267\u884C <code>yield</code> \u51FD\u6570\u4E4B\u540E\u4E92\u76F8\u7ADE\u4E89\u5BFC\u81F4 CPU \u4F7F\u7528\u7387\u589E\u9AD8\uFF0C\u800C\u901A\u8FC7\u5BF9\u5806\u6808\u53D1\u73B0\u662F\u548C\u4F7F\u7528 <code>Disruptor</code> \u6709\u5173\u3002</p><h2 id="\u89E3\u51B3\u95EE\u9898" tabindex="-1"><a class="header-anchor" href="#\u89E3\u51B3\u95EE\u9898" aria-hidden="true">#</a> \u89E3\u51B3\u95EE\u9898</h2><p>\u800C\u540E\u6211\u67E5\u770B\u4E86\u4EE3\u7801\uFF0C\u53D1\u73B0\u662F\u6839\u636E\u6BCF\u4E00\u4E2A\u4E1A\u52A1\u573A\u666F\u5728\u5185\u90E8\u90FD\u4F1A\u4F7F\u7528 2 \u4E2A <code>Disruptor</code> \u961F\u5217\u6765\u89E3\u8026\u3002</p><p>\u5047\u8BBE\u73B0\u5728\u6709 7 \u4E2A\u4E1A\u52A1\u7C7B\u578B\uFF0C\u90A3\u5C31\u7B49\u4E8E\u662F\u521B\u5EFA <code>2*7=14</code> \u4E2A <code>Disruptor</code> \u961F\u5217\uFF0C\u540C\u65F6\u6BCF\u4E2A\u961F\u5217\u6709\u4E00\u4E2A\u6D88\u8D39\u8005\uFF0C\u4E5F\u5C31\u662F\u603B\u5171\u6709 14 \u4E2A\u6D88\u8D39\u8005\uFF08\u751F\u4EA7\u73AF\u5883\u66F4\u591A\uFF09\u3002</p><p>\u540C\u65F6\u53D1\u73B0\u914D\u7F6E\u7684\u6D88\u8D39\u7B49\u5F85\u7B56\u7565\u4E3A <code>YieldingWaitStrategy</code> \u8FD9\u79CD\u7B49\u5F85\u7B56\u7565\u786E\u5B9E\u4F1A\u6267\u884C yield \u6765\u8BA9\u51FA CPU\u3002</p><p>\u4EE3\u7801\u5982\u4E0B\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/cpu-percent-100-49840c0d-2c10-4bcb-80c6-1df7553ddb6c.jpg" alt=""></p><blockquote><p>\u521D\u6B65\u770B\u6765\u548C\u8FD9\u4E2A\u7B49\u5F85\u7B56\u7565\u6709\u5F88\u5927\u7684\u5173\u7CFB\u3002</p></blockquote><h3 id="\u672C\u5730\u6A21\u62DF" tabindex="-1"><a class="header-anchor" href="#\u672C\u5730\u6A21\u62DF" aria-hidden="true">#</a> \u672C\u5730\u6A21\u62DF</h3><p>\u4E3A\u4E86\u9A8C\u8BC1\uFF0C\u6211\u5728\u672C\u5730\u521B\u5EFA\u4E86 15 \u4E2A <code>Disruptor</code> \u961F\u5217\u540C\u65F6\u7ED3\u5408\u76D1\u63A7\u89C2\u5BDF CPU \u7684\u4F7F\u7528\u60C5\u51B5\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/cpu-percent-100-7f3b2fa6-6505-4b67-9f42-0170a236832b.jpg" alt=""><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/cpu-percent-100-d597089d-54e0-49ef-a0f9-41798e84de48.jpg" alt=""></p><p>\u521B\u5EFA\u4E86 15 \u4E2A <code>Disruptor</code> \u961F\u5217\uFF0C\u540C\u65F6\u6BCF\u4E2A\u961F\u5217\u90FD\u7528\u7EBF\u7A0B\u6C60\u6765\u5F80 <code>Disruptor\u961F\u5217</code> \u91CC\u9762\u53D1\u9001 100W \u6761\u6570\u636E\u3002</p><p>\u6D88\u8D39\u7A0B\u5E8F\u4EC5\u4EC5\u53EA\u662F\u6253\u5370\u4E00\u4E0B\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/cpu-percent-100-97b88b4d-2d81-47ab-9beb-830ac122c282.jpg" alt=""></p><p>\u8DD1\u4E86\u4E00\u6BB5\u65F6\u95F4\u53D1\u73B0 CPU \u4F7F\u7528\u7387\u786E\u5B9E\u5F88\u9AD8\u3002</p><hr><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/cpu-percent-100-c0ee1da2-29af-4581-b0d8-97f6250401e7.jpg" alt=""></p><p>\u540C\u65F6 <code>dump</code> \u7EBF\u7A0B\u53D1\u73B0\u548C\u751F\u4EA7\u7684\u73B0\u8C61\u4E5F\u662F\u4E00\u81F4\u7684\uFF1A\u6D88\u8D39\u7EBF\u7A0B\u90FD\u5904\u4E8E <code>RUNNABLE</code> \u72B6\u6001\uFF0C\u540C\u65F6\u90FD\u5728\u6267\u884C <code>yield</code>\u3002</p><p>\u901A\u8FC7\u67E5\u8BE2 <code>Disruptor</code> \u5B98\u65B9\u6587\u6863\u53D1\u73B0\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/cpu-percent-100-de904a90-8b59-4333-82f5-9ec94a6525a0.jpg" alt=""></p><blockquote><p>YieldingWaitStrategy \u662F\u4E00\u79CD\u5145\u5206\u538B\u69A8 CPU \u7684\u7B56\u7565\uFF0C\u4F7F\u7528<code>\u81EA\u65CB + yield</code>\u7684\u65B9\u5F0F\u6765\u63D0\u9AD8\u6027\u80FD\u3002 \u5F53\u6D88\u8D39\u7EBF\u7A0B\uFF08Event Handler threads\uFF09\u7684\u6570\u91CF\u5C0F\u4E8E CPU \u6838\u5FC3\u6570\u65F6\u63A8\u8350\u4F7F\u7528\u8BE5\u7B56\u7565\u3002</p></blockquote><hr><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/cpu-percent-100-3faf6f7e-0d2c-4cfe-8e3a-07e15601485d.jpg" alt=""></p><p>\u540C\u65F6\u67E5\u9605\u5230\u5176\u4ED6\u7684\u7B49\u5F85\u7B56\u7565 <code>BlockingWaitStrategy</code> \uFF08\u4E5F\u662F\u9ED8\u8BA4\u7684\u7B56\u7565\uFF09\uFF0C\u5B83\u4F7F\u7528\u7684\u662F\u9501\u7684\u673A\u5236\uFF0C\u5BF9 CPU \u7684\u4F7F\u7528\u7387\u4E0D\u9AD8\u3002</p><p>\u4E8E\u662F\u5728\u548C\u4E4B\u524D\u540C\u6837\u7684\u6761\u4EF6\u4E0B\u5C06\u7B49\u5F85\u7B56\u7565\u6362\u4E3A <code>BlockingWaitStrategy</code>\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/cpu-percent-100-12912ce3-a702-4bb2-a19b-816c22f7d43a.jpg" alt=""></p><hr><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/cpu-percent-100-b4aad83e-af9d-48fc-bcd0-ad2a42588179.jpg" alt=""><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/cpu-percent-100-56dc1513-8f10-422f-bb2a-ae5dcfb8413f.jpg" alt=""></p><p>\u548C\u521A\u624D\u7684 CPU \u5BF9\u6BD4\u4F1A\u53D1\u73B0\u5230\u540E\u9762\u4F7F\u7528\u7387\u7684\u4F1A\u6709\u660E\u663E\u7684\u964D\u4F4E\uFF1B\u540C\u65F6 dump \u7EBF\u7A0B\u540E\u4F1A\u53D1\u73B0\u5927\u90E8\u5206\u7EBF\u7A0B\u90FD\u5904\u4E8E waiting \u72B6\u6001\u3002</p><h3 id="\u4F18\u5316\u89E3\u51B3" tabindex="-1"><a class="header-anchor" href="#\u4F18\u5316\u89E3\u51B3" aria-hidden="true">#</a> \u4F18\u5316\u89E3\u51B3</h3><p>\u770B\u6837\u5B50\u5C06\u7B49\u5F85\u7B56\u7565\u6362\u4E3A <code>BlockingWaitStrategy</code> \u53EF\u4EE5\u51CF\u7F13 CPU \u7684\u4F7F\u7528\uFF0C</p><p>\u4F46\u7559\u610F\u5230\u5B98\u65B9\u5BF9 <code>YieldingWaitStrategy</code> \u7684\u63CF\u8FF0\u91CC\u8C08\u9053\uFF1A \u5F53\u6D88\u8D39\u7EBF\u7A0B\uFF08Event Handler threads\uFF09\u7684\u6570\u91CF\u5C0F\u4E8E CPU \u6838\u5FC3\u6570\u65F6\u63A8\u8350\u4F7F\u7528\u8BE5\u7B56\u7565\u3002</p><p>\u800C\u73B0\u6709\u7684\u4F7F\u7528\u573A\u666F\u5F88\u660E\u663E\u6D88\u8D39\u7EBF\u7A0B\u6570\u5DF2\u7ECF\u5927\u5927\u7684\u8D85\u8FC7\u4E86\u6838\u5FC3 CPU \u6570\u4E86\uFF0C\u56E0\u4E3A\u6211\u7684\u4F7F\u7528\u65B9\u5F0F\u662F\u4E00\u4E2A <code>Disruptor</code> \u961F\u5217\u4E00\u4E2A\u6D88\u8D39\u8005\uFF0C\u6240\u4EE5\u6211\u5C06\u961F\u5217\u8C03\u6574\u4E3A\u53EA\u6709 1 \u4E2A\u518D\u8BD5\u8BD5(\u7B56\u7565\u4F9D\u7136\u662F <code>YieldingWaitStrategy</code>)\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/cpu-percent-100-b1cbc2c2-828a-46e8-ba14-86cd0fa660c6.jpg" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/cpu-percent-100-f8fb7682-a61a-407d-923c-890a16bce109.jpg" alt=""></p><p>\u8DD1\u4E86\u4E00\u5206\u949F\uFF0C\u53D1\u73B0 CPU \u7684\u4F7F\u7528\u7387\u4E00\u76F4\u90FD\u6BD4\u8F83\u5E73\u7A33\u800C\u4E14\u4E0D\u9AD8\u3002</p><h2 id="\u603B\u7ED3" tabindex="-1"><a class="header-anchor" href="#\u603B\u7ED3" aria-hidden="true">#</a> \u603B\u7ED3</h2><p>\u6240\u4EE5\u6392\u67E5\u5230\u6B64\u53EF\u4EE5\u6709\u4E00\u4E2A\u7ED3\u8BBA\u4E86\uFF0C\u60F3\u8981\u6839\u672C\u89E3\u51B3\u8FD9\u4E2A\u95EE\u9898\u9700\u8981\u5C06\u6211\u4EEC\u73B0\u6709\u7684\u4E1A\u52A1\u62C6\u5206\uFF1B\u73B0\u5728\u662F\u4E00\u4E2A\u5E94\u7528\u91CC\u540C\u65F6\u5904\u7406\u4E86 N \u4E2A\u4E1A\u52A1\uFF0C\u6BCF\u4E2A\u4E1A\u52A1\u90FD\u4F1A\u4F7F\u7528\u597D\u51E0\u4E2A <code>Disruptor</code> \u961F\u5217\u3002</p><p>\u7531\u4E8E\u662F\u5728\u4E00\u53F0\u670D\u52A1\u5668\u4E0A\u8FD0\u884C\uFF0C\u6240\u4EE5 CPU \u8D44\u6E90\u90FD\u662F\u5171\u4EAB\u7684\uFF0C\u8FD9\u5C31\u4F1A\u5BFC\u81F4 CPU \u7684\u4F7F\u7528\u7387\u5C45\u9AD8\u4E0D\u4E0B\u3002</p><p>\u6240\u4EE5\u6211\u4EEC\u7684\u8C03\u6574\u65B9\u5F0F\u5982\u4E0B\uFF1A</p><ul><li>\u4E3A\u4E86\u5FEB\u901F\u7F13\u89E3\u8FD9\u4E2A\u95EE\u9898\uFF0C\u5148\u5C06\u7B49\u5F85\u7B56\u7565\u6362\u4E3A <code>BlockingWaitStrategy</code>\uFF0C\u53EF\u4EE5\u6709\u6548\u964D\u4F4E CPU \u7684\u4F7F\u7528\u7387\uFF08\u4E1A\u52A1\u4E0A\u4E5F\u8FD8\u80FD\u63A5\u53D7\uFF09\u3002</li><li>\u7B2C\u4E8C\u6B65\u5C31\u9700\u8981\u5C06\u5E94\u7528\u62C6\u5206\uFF08\u4E0A\u6587\u6A21\u62DF\u7684\u4E00\u4E2A <code>Disruptor</code> \u961F\u5217\uFF09\uFF0C\u4E00\u4E2A\u5E94\u7528\u5904\u7406\u4E00\u79CD\u4E1A\u52A1\u7C7B\u578B\uFF1B\u7136\u540E\u5206\u522B\u5355\u72EC\u90E8\u7F72\uFF0C\u8FD9\u6837\u4E5F\u53EF\u4EE5\u4E92\u76F8\u9694\u79BB\u4E92\u4E0D\u5F71\u54CD\u3002</li></ul><p>\u5F53\u7136\u8FD8\u6709\u5176\u4ED6\u7684\u4E00\u4E9B\u4F18\u5316\uFF0C\u56E0\u4E3A\u8FD9\u4E5F\u662F\u4E00\u4E2A\u8001\u7CFB\u7EDF\u4E86\uFF0C\u8FD9\u6B21 dump \u7EBF\u7A0B\u5C45\u7136\u53D1\u73B0\u521B\u5EFA\u4E86 800+ \u7684\u7EBF\u7A0B\u3002</p><p>\u521B\u5EFA\u7EBF\u7A0B\u6C60\u7684\u65B9\u5F0F\u4E5F\u662F\u6838\u5FC3\u7EBF\u7A0B\u6570\u3001\u6700\u5927\u7EBF\u7A0B\u6570\u662F\u4E00\u6837\u7684\uFF0C\u5BFC\u81F4\u4E00\u4E9B\u7A7A\u95F2\u7684\u7EBF\u7A0B\u4E5F\u5F97\u4E0D\u5230\u56DE\u6536\uFF1B\u8FD9\u6837\u4F1A\u6709\u5F88\u591A\u65E0\u610F\u4E49\u7684\u8D44\u6E90\u6D88\u8017\u3002</p><p>\u6240\u4EE5\u4E5F\u4F1A\u7ED3\u5408\u4E1A\u52A1\u5C06\u521B\u5EFA\u7EBF\u7A0B\u6C60\u7684\u65B9\u5F0F\u8C03\u6574\u4E00\u4E0B\uFF0C\u5C06\u7EBF\u7A0B\u6570\u964D\u4E0B\u6765\uFF0C\u5C3D\u91CF\u7684\u7269\u5C3D\u5176\u7528\u3002</p><p>\u672C\u6587\u7684\u6F14\u793A\u4EE3\u7801\u5DF2\u4E0A\u4F20\u81F3 GitHub\uFF1A</p>',50),U={href:"https://github.com/crossoverJie/JCSprout/tree/master/src/main/java/com/crossoverjie/disruptor",target:"_blank",rel:"noopener noreferrer"},k=t("https://github.com/crossoverJie/JCSprout"),D=e("p",null,[e("strong",null,"\u4F60\u7684\u70B9\u8D5E\u4E0E\u5206\u4EAB\u662F\u5BF9\u6211\u6700\u5927\u7684\u652F\u6301")],-1),y=t("\u539F\u6587\u94FE\u63A5\uFF1A"),x={href:"https://github.com/crossoverJie/JCSprout/blob/master/docs/jvm/cpu-percent-100.md",target:"_blank",rel:"noopener noreferrer"},S=t("https://github.com/crossoverJie/JCSprout/blob/master/docs/jvm/cpu-percent-100.md"),B=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png",alt:""})],-1);function J(N,W){const o=p("ExternalLinkIcon");return d(),i("div",null,[n,e("p",null,[b,h,l,m,g,e("a",u,[j,c(o)])]),v,f,e("p",null,[e("a",_,[C,c(o)])]),P,e("p",null,[e("a",U,[k,c(o)])]),D,e("p",null,[y,e("a",x,[S,c(o)])]),B])}var H=r(s,[["render",J],["__file","cpu-percent-100.html.vue"]]);export{H as default};
diff --git a/dist/assets/csdn-1000wan.html.2e52cd37.js b/dist/assets/csdn-1000wan.html.22ddf17a.js
similarity index 99%
rename from dist/assets/csdn-1000wan.html.2e52cd37.js
rename to dist/assets/csdn-1000wan.html.22ddf17a.js
index 06b6b140..af04cd1d 100644
--- a/dist/assets/csdn-1000wan.html.2e52cd37.js
+++ b/dist/assets/csdn-1000wan.html.22ddf17a.js
@@ -1 +1 @@
-import{_ as r}from"./plugin-vue_export-helper.21dcd24c.js";import{r as n,o as c,c as s,a as e,b as p,d as a,e as o}from"./app.a0271b9c.js";const i={},d=e("h1",{id:"\u6211\u7684\u7B2C\u4E8C\u4E2A-\u4E00\u5343\u4E07-csdn\u9605\u8BFB",tabindex:"-1"},[e("a",{class:"header-anchor",href:"#\u6211\u7684\u7B2C\u4E8C\u4E2A-\u4E00\u5343\u4E07-csdn\u9605\u8BFB","aria-hidden":"true"},"#"),a(" \u6211\u7684\u7B2C\u4E8C\u4E2A\uFF0C\u4E00\u5343\u4E07\uFF01CSDN\u9605\u8BFB")],-1),b=e("p",null,"\u5927\u5BB6\u597D\uFF0C\u6211\u662F\u4E8C\u54E5\u5440\uFF01",-1),l=a("\u79BB"),g={href:"https://mp.weixin.qq.com/s/8AylY_3EA5wWaKKU-qvDYw",target:"_blank",rel:"noopener noreferrer"},m=a("\u4E0A\u4E00\u4E2A\u4E00\u5343\u4E07"),h=a("\uFF0C\u8FD8\u662F\u4E0A\u4E00\u6B21\u3002"),f=o('<p>\u6211\u52AA\u529B\u7684\u56DE\u60F3\u7740\uFF0C\u56DE\u60F3\u81EA\u5DF1\u5728 2021 \u5E74\u505A\u51FA\u4E86\u54EA\u4E9B\u8000\u773C\u7684\u6210\u7EE9\uFF0C\u6B63\u895F\u5371\u5750\uFF0C\u56DE\u60F3\u826F\u4E45\uFF0C\u4E5F\u53EA\u60F3\u5230\u8FD9\u6700\u540E\u4E00\u4EF6\uFF1A<strong>CSDN \u7684\u535A\u6587\u8BBF\u95EE\u91CF\u4E5F\u7A81\u7834\u4E86\u4E00\u5343\u4E07</strong>\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/csdn-1000wan-2627c2a4-46c1-49a9-b86f-607c65ba6398.png" alt=""></p><p>\u4F46\u8FD9\u7B97\u4E0D\u7B97\u5F97\u4E0A\u662F\u6210\u7EE9\uFF0C\u5F88\u96BE\u8BF4\uFF0C\u56E0\u4E3A\u559C\u6B22\u8FD9\u4E2A\u5E73\u53F0\u7684\u4EBA\u6709\u5F88\u591A\uFF0C\u4E0D\u559C\u6B22\u8FD9\u4E2A\u5E73\u53F0\u7684\u4E5F\u6709\u5F88\u591A\u3002\u4E5F\u8BB8\uFF0CGitHub \u4E0A\u6709 110k+ star \u7684 JavaGuide \u7684\u8BDD\u6700\u5177\u6709\u8BF4\u670D\u529B\u4E86\uFF0C\u8FD9\u4E2A\u5E73\u53F0\u4E0D\u89C4\u8303\u8F6C\u8F7D\u7684\u5F88\u591A\uFF0C\u5783\u573E\u8D44\u6E90\u4E0B\u8F7D\u7684\u5F88\u591A\uFF0C\u4F46\u4E5F\u6709\u51E0\u4E2A\u4F18\u79C0\u7684\u4F5C\u8005\u6491\u8D77\u4E86 CSDN \u7684\u534A\u8FB9\u5929\uFF0C\u4E8C\u54E5\u5C31\u662F\u5176\u4E2D\u4E00\u4E2A\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/csdn-1000wan-a7c74449-7183-453f-8286-92d0bfe0a56d.png" alt=""></p><p>\u8001\u8BFB\u8005\u90FD\u77E5\u9053\uFF0C\u6211\u662F\u4ECE2014 \u5E74\uFF0C\u5F00\u59CB\u575A\u6301\u5199\u6280\u672F\u535A\u5BA2\u7684\u3002\u4E00\u5F00\u59CB\uFF0C\u8FD8\u6CA1\u6562\u5728 CSDN \u4E0A\u5199\uFF0C\u53EA\u6562\u5728 JavaEye \u4E0A\u5199\uFF08\u4F30\u8BA1\u5F88\u591A\u65B0\u8BFB\u8005\u90FD\u4E0D\u592A\u77E5\u9053\u8FD9\u4E2A\u5E73\u53F0\uFF09\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/csdn-1000wan-43677bfa-bdd6-4c3b-aa67-3a3277dc3575.png" alt=""></p><p>\u90A3\u65F6\u5019\u7684 JavaEye \u771F\u7684\u662F\u975E\u5E38\u975E\u5E38\u975E\u5E38\u7684\u7EAF\u7CB9\uFF08\u6BD4\u535A\u5BA2\u56ED\u66F4\u7EAF\u7CB9\uFF09\uFF0C\u6CA1\u6709\u4EFB\u4F55\u5546\u4E1A\u5E7F\u544A\uFF0C\u8FD8\u65F6\u4E0D\u65F6\u9001\u9001\u4E66\uFF0C\u5934\u90E8\u4F5C\u8005\u6709 fastjson \u7684\u4F5C\u8005\u6E29\u5C11\uFF0C\u300A\u4EBF\u7EA7\u6D41\u91CF\u7F51\u7AD9\u67B6\u6784\u6838\u5FC3\u6280\u672F\u300B\u4F5C\u8005\u5F00\u6D9B\uFF0C\u60F3\u5FC5\u505A\u6280\u672F\u7684\u5927\u5BB6\u5E94\u8BE5\u90FD\u77E5\u9053\u4ED6\u4EEC\u4FE9\u3002</p><p>\u540E\u6765\u80C6\u5B50\u5927\u4E86\uFF0C\u5C31\u5F00\u59CB\u5728 CSDN \u4E0A\u5199\uFF0C\u5F53\u65F6\u8BA4\u8BC6\u7684\u5934\u90E8\u4F5C\u8005\u6709\u5B89\u6653\u8F89\u3001\u6D45\u58A8\uFF08\u6BDB\u661F\u4E91\uFF09\u3001\u6768\u79C0\u748B\u7B49\u7B49\u3002</p><p>\u5C31\u8FD9\u6837\u5199\u7740\u5199\u7740\uFF0C\u6211\u6210\u4E86 CSDN \u7684\u535A\u5BA2\u4E13\u5BB6\uFF0C\u51FA\u7248\u4E86\u4E00\u672C\u6280\u672F\u56FE\u4E66\uFF0C\u6210\u4E3A\u4E86\u4E24\u5C4A\u535A\u5BA2\u4E4B\u661F\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/csdn-1000wan-5137a245-035e-4e36-ba04-2b06fae275e1.png" alt=""></p><p>\u5C31\u8FD9\u6837\u5199\u7740\u5199\u7740\uFF0C\u6211\u9047\u5230\u4E86\u8D8A\u6765\u8D8A\u591A\u7684\u8BFB\u8005\uFF0C\u7ED9\u4ED6\u4EEC\u63D0\u4F9B\u5E2E\u52A9\u7684\u540C\u65F6\uFF0C\u4E5F\u6210\u4E3A\u4E86\u4ED6\u4EEC\u524D\u8FDB\u7684\u52A8\u529B\u3002</p><p>\u636E\u6211\u81EA\u5DF1\u7684\u4E0D\u5B8C\u5168\u7EDF\u8BA1\uFF0C2021 \u5E74\uFF0C\u6211\u5728\u670B\u53CB\u5708\u548C\u516C\u4F17\u53F7\u9001\u51FA\u53BB\u4E86\u8D85\u8FC7 200 \u672C\u6280\u672F\u56FE\u4E66\uFF0C\u6BCF\u6B21\u6211\u90FD\u4F1A\u7559\u4E2A\u5C0F\u5FC3\u673A\uFF0C\u95EE\u4E2D\u5956\u7684\u8BFB\u8005\u662F\u600E\u4E48\u8BA4\u8BC6\u4E8C\u54E5\u7684\uFF0C\u6709\u6CA1\u6709\u4EC0\u4E48\u5EFA\u8BAE\uFF0C\u7559\u8A00\u4E2D\u7ADF\u7136\u5F88\u591A\u90FD\u6765\u81EA CSDN\uFF0C\u8FD9\u8BA9\u6211\u53C8\u60CA\u53C8\u559C\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/csdn-1000wan-11df1e5d-2505-416c-949a-607b4ebbc61f.png" alt=""></p><p>\u7ECF\u5E38\u6709\u8BFB\u8005\u5938\u8D5E\u4E8C\u54E5\u597D\u6709\u5199\u4F5C\u7684\u5929\u8D4B\u554A\uFF0C\u5176\u5B9E\u54EA\u91CC\u662F\u6709\u5929\u8D4B\uFF0C\u7EAF\u7CB9\u662F\u56E0\u4E3A\u5199\u5F97\u591A\uFF0C\u6240\u4EE5\u624D\u5199\u5F97\u597D\u3002\u6211\u73B0\u5728\u7684\u6587\u7B14\uFF0C\u8BB2\u771F\uFF0C\u8FD8\u4E0D\u5982\u4E0A\u9AD8\u4E2D\u90A3\u4F1A\uFF0C\u90A3\u4F1A\u624D\u662F\u771F\u7684\u7B14\u4E0B\u751F\u82B1\uFF0C\u8BD7\u90FD\u80FD\u5199\u5F97\u51FA\u6765\uFF0C\u60C5\u4E66\u5C31\u66F4\u4E0D\u7528\u8BF4\u4E86\u3002</p><p>\u7B49\u8FC7\u5E74\u7684\u65F6\u5019\u5427\uFF0C\u6211\u628A\u90A3\u4E9B\u5C18\u5C01\u591A\u5E74\u7684\u6587\u5B57\u8D34\u51FA\u6765\u7ED9\u5927\u5BB6\u77A7\u77A7\u3002</p><h3 id="\u4E00\u3001\u8FFD\u5FC6\u5F80\u4E8B" tabindex="-1"><a class="header-anchor" href="#\u4E00\u3001\u8FFD\u5FC6\u5F80\u4E8B" aria-hidden="true">#</a> \u4E00\u3001\u8FFD\u5FC6\u5F80\u4E8B</h3><p>\u501F\u8FD9\u4E2A\u673A\u4F1A\uFF0C\u548C\u5927\u5BB6\u4E00\u8D77\u5750\u4E0A\u65F6\u5149\u673A\u91CD\u6E29\u4E00\u4E0B\u5F80\u4E8B\u5427\u3002\u7FFB\u770B\u76F8\u518C\uFF0C2021 \u5E74\uFF0C\u8FD8\u771F\u6709\u4E0D\u5C11\u4EE4\u4EBA\u611F\u52A8\u7684\u77AC\u95F4\uFF0C\u592A\u591A\u592A\u591A\u4E86\uFF0C\u6211\u5C31\u6BCF\u4E2A\u6708\u6311\u4E00\u4EF6\u5427\u3002</p><p>1 \u6708 13 \u65E5\uFF0C\u6211\u548C\u59B9\u59B9\u5728\u5C0F\u53D4\u5BB6\u7684\u623F\u9876\u4E0A\u81EA\u62CD\u3002</p><p>2 \u6708 15 \u65E5\uFF0C\u6211\u548C\u5976\u5976\u7684\u5408\u5F71\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/csdn-1000wan-14d7737b-7324-4717-bd16-a3da7f2b1223.png" alt=""></p><p>3 \u6708 26 \u65E5\uFF0C\u8BFB\u8005\u8003\u4E0A\u7814\u7A76\u751F\u4E86\uFF0C\u7279\u610F\u53D1\u6765\u795D\u8D3A\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/csdn-1000wan-63626ad5-8580-4565-a0da-af3a0bf43875.png" alt=""></p><p>4 \u6708 3 \u65E5\uFF0C\u548C\u6559\u7EC3\u5C0F\u59D0\u59D0\u5728\u5065\u8EAB\u623F\u5408\u5F71\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/csdn-1000wan-eb256e24-de8a-49d0-a6ef-eb6d0b8d28e7.png" alt=""></p><p>5 \u6708 25 \u65E5\uFF0C\u4E8C\u54E5\u7684\u8BFB\u8005\u7FA4\u4F53\u6269\u5927\u4E86\u53F0\u6E7E\u7701\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/csdn-1000wan-b2a8a63c-8c8f-4d39-9a9f-acf54c908058.png" alt=""></p><p>6 \u6708 13 \u65E5\uFF0C\u548C\u5BB6\u4EBA\u7545\u6E38\u9752\u5C9B\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/csdn-1000wan-b430951d-544c-4743-b700-3c71a854267a.png" alt=""></p><p>7 \u6708 20 \u65E5\uFF0C\u88AB\u67D0\u67D0\u5973\u7C89\u8FFD\u7740\u8981\u8054\u7CFB\u65B9\u5F0F\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/csdn-1000wan-d7e127c5-5560-45c0-87c8-4cea924047cd.png" alt=""></p><p>8 \u6708 21 \u65E5\uFF0C\u5728\u5341\u516B\u7EBF\u53BF\u57CE\u7684\u8001\u5BB6\u7838\u6838\u6843\u5403\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/csdn-1000wan-944b3f88-86ab-4e86-aeb6-4ad1f4f1ece3.png" alt=""></p><p>9 \u6708 23 \u65E5\uFF0C\u6536\u5230\u6398\u91D1\u548C CSDN \u5BC4\u6765\u7684\u6708\u997C\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/csdn-1000wan-0056fcd2-afa4-475e-ad69-95b84b90b8c7.png" alt=""></p><p>10 \u6708 11 \u65E5\uFF0C\u6536\u5230\u300AJava \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF\u300B\u4E13\u680F\u5728 GitHub \u4E0A\u5F00\u6E90\u4EE5\u6765\u7684\u4E24\u7B14\u5927\u989D\u6253\u8D4F\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/csdn-1000wan-7e6d9918-6d94-45ef-9afa-42882f79944d.png" alt=""></p><p>11 \u6708 6 \u65E5\uFF0C\u548C\u56DB\u4F4D\u6CB3\u79D1\u5927\u7684\u5B66\u5F1F\u64B8\u5B8C\u4E32\u540E\u5728\u6821\u56ED\u91CC\u7684\u5408\u5F71\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/csdn-1000wan-0c1b3624-f4e5-4e0c-b119-0ef4d440a60d.png" alt=""></p><p>12 \u6708 27 \u65E5\uFF0CCSDN \u751F\u6210\u7684\u5E74\u5EA6\u62A5\u544A\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/csdn-1000wan-a070af45-bfeb-4b1a-9b29-745279a4a0fc.png" alt=""></p><p>\u4E0D\u77E5\u9053\u5927\u5BB6\u7684 2021 \u8FC7\u5F97\u600E\u4E48\u6837\uFF1F</p><ul><li>\u5145\u5B9E\uFF1F</li><li>\u843D\u9B44\uFF1F</li><li>\u4E0A\u8FDB\uFF1F</li><li>\u6D88\u6781\uFF1F</li><li>\u5E78\u798F\uFF1F</li><li>\u60B2\u4F24\uFF1F</li></ul><p>\u6211\u4E2A\u4EBA\u7684\u611F\u53D7\u662F<strong>\u5E73\u6DE1\u4E2D\u6709\u4E00\u70B9\u70B9\u5C0F\u786E\u5E78\uFF0C\u5E73\u51E1\u4E2D\u6709\u4E00\u70B9\u70B9\u5C0F\u8FDB\u6B65</strong>\uFF0C\u8FD9\u4E5F\u8BB8\u5C31\u662F\u666E\u901A\u4EBA\u6700\u771F\u5B9E\u7684\u5199\u7167\u4E86\u5427\uFF1F</p><h3 id="\u4E8C\u3001\u6709\u70B9\u9057\u61BE" tabindex="-1"><a class="header-anchor" href="#\u4E8C\u3001\u6709\u70B9\u9057\u61BE" aria-hidden="true">#</a> \u4E8C\u3001\u6709\u70B9\u9057\u61BE</h3><p>\u4E00\u5E74\u65F6\u95F4\u8FC7\u5F97\u53EF\u771F\u5FEB\uFF0C\u6709\u5F88\u591A\u60F3\u505A\u597D\u7684\u4E8B\u60C5\uFF0C\u5230\u6700\u540E\u90FD\u5DEE\u4E86\u70B9\u610F\u601D\u3002\u5C31\u8BF4\u4E00\u4EF6\u5427\uFF0CB \u7AD9\u7684\u89C6\u9891\u64AD\u653E\u91CF\u6CA1\u6709\u8FBE\u5230\u9884\u671F\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/csdn-1000wan-83e7cfbc-496d-45e8-bfd6-cd0d1dfc60d3.png" alt=""></p><p>8 \u6708\u4EFD\u8FD8\u80FD\u575A\u6301\u4E00\u5468\u8F93\u51FA\u4E00\u4E2A\uFF0C\u4ECE\u4E00\u5F00\u59CB\u9762\u5BF9\u955C\u5934\u65F6\u7684\u6050\u60E7\uFF0C\u5230\u6162\u6162\u63A5\u7EB3\u81EA\u5DF1\u3002\u4F46\u597D\u666F\u4E0D\u957F\uFF0C9 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id="\u4E09\u3001\u65B0\u7684\u61A7\u61AC" tabindex="-1"><a class="header-anchor" href="#\u4E09\u3001\u65B0\u7684\u61A7\u61AC" aria-hidden="true">#</a> \u4E09\u3001\u65B0\u7684\u61A7\u61AC</h3><p>\u5C55\u671B 2022 \u5E74\uFF0C\u6709\u592A\u591A\u7684\u671F\u5F85\u4E86\u3002</p><p>\u8FD9\u4E0D\uFF0C\u65B0\u7684\u60CA\u559C\u5C31\u662F\u300AJava \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF\u300B\u4E13\u680F\u7B2C\u4E00\u6B21\u4E0A\u4E86 GitHub \u7684 trending \u699C\u5355\uFF01</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/csdn-1000wan-8868c50f-d622-4f1f-a92b-13cf95edd786.png" alt=""></p><p>\u6B63\u5E94\u4E86\u90A3\u53E5\u8BDD\uFF0C\u529F\u592B\u4E0D\u8D1F\u6709\u5FC3\u4EBA\u3002</p><p>\u5BF9\u4E8E\u8FD9\u4E2A\u5F00\u6E90\u4E13\u680F\uFF0C\u6211\u6295\u5165\u4E86\u5927\u91CF\u7684\u5FC3\u8840\uFF0C\u4E00\u5F00\u59CB\u7684\u540D\u5B57\u53EB\u300A\u6559\u59B9\u5B66 Java\u300B\uFF0C\u4E3B\u6253 Java 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src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/csdn-1000wan-5ebc2c65-f342-45f9-aaf6-7f663b5406b8.png" alt=""></p><p>\u8FD9\u4E2A flag \u7EDD\u4E0D\u80FD\u5012\uFF01</p><p>\u8FD8\u6709\u4E00\u4EF6\u4E8B\uFF0C\u5C31\u662F\u6211\u6253\u7B97\u5171\u5EFA\u4E00\u4E2A\u77E5\u8BC6\u661F\u7403\uFF0C\u56E0\u4E3A\u6BCF\u5929\u8FC7\u6765\u54A8\u8BE2\u4E8C\u54E5\u95EE\u9898\u7684\u8BFB\u8005\u5B9E\u5728\u662F\u592A\u591A\u4E86\uFF0C\u5BFC\u81F4\u56DE\u590D\u901F\u5EA6\u53D8\u5F97\u5F88\u6162\uFF0C\u6548\u7387\u4E0D\u9AD8\u3002</p><p>\u5982\u679C\u80FD\u5EFA\u4E00\u4E2A\u77E5\u8BC6\u661F\u7403\uFF0C\u628A\u8FD9\u4E9B\u95EE\u9898\u7684\u7B54\u6848\u5168\u90E8\u6C89\u6DC0\u4E0B\u6765\uFF0C\u9694\u65AD\u65F6\u95F4\u6574\u7406\u4E00\u6CE2 PDF\uFF0C\u5C31\u7F8E\u6ECB\u6ECB\u4E86\u3002</p><p>\u76EE\u524D\u89C4\u5212\u7684\u65B9\u5411\u6709\uFF1A</p><ul><li>offer 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\u5E74\uFF0C\u6211\u5728\u670B\u53CB\u5708\u548C\u516C\u4F17\u53F7\u9001\u51FA\u53BB\u4E86\u8D85\u8FC7 200 \u672C\u6280\u672F\u56FE\u4E66\uFF0C\u6BCF\u6B21\u6211\u90FD\u4F1A\u7559\u4E2A\u5C0F\u5FC3\u673A\uFF0C\u95EE\u4E2D\u5956\u7684\u8BFB\u8005\u662F\u600E\u4E48\u8BA4\u8BC6\u4E8C\u54E5\u7684\uFF0C\u6709\u6CA1\u6709\u4EC0\u4E48\u5EFA\u8BAE\uFF0C\u7559\u8A00\u4E2D\u7ADF\u7136\u5F88\u591A\u90FD\u6765\u81EA CSDN\uFF0C\u8FD9\u8BA9\u6211\u53C8\u60CA\u53C8\u559C\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/csdn-1000wan-11df1e5d-2505-416c-949a-607b4ebbc61f.png" alt=""></p><p>\u7ECF\u5E38\u6709\u8BFB\u8005\u5938\u8D5E\u4E8C\u54E5\u597D\u6709\u5199\u4F5C\u7684\u5929\u8D4B\u554A\uFF0C\u5176\u5B9E\u54EA\u91CC\u662F\u6709\u5929\u8D4B\uFF0C\u7EAF\u7CB9\u662F\u56E0\u4E3A\u5199\u5F97\u591A\uFF0C\u6240\u4EE5\u624D\u5199\u5F97\u597D\u3002\u6211\u73B0\u5728\u7684\u6587\u7B14\uFF0C\u8BB2\u771F\uFF0C\u8FD8\u4E0D\u5982\u4E0A\u9AD8\u4E2D\u90A3\u4F1A\uFF0C\u90A3\u4F1A\u624D\u662F\u771F\u7684\u7B14\u4E0B\u751F\u82B1\uFF0C\u8BD7\u90FD\u80FD\u5199\u5F97\u51FA\u6765\uFF0C\u60C5\u4E66\u5C31\u66F4\u4E0D\u7528\u8BF4\u4E86\u3002</p><p>\u7B49\u8FC7\u5E74\u7684\u65F6\u5019\u5427\uFF0C\u6211\u628A\u90A3\u4E9B\u5C18\u5C01\u591A\u5E74\u7684\u6587\u5B57\u8D34\u51FA\u6765\u7ED9\u5927\u5BB6\u77A7\u77A7\u3002</p><h3 id="\u4E00\u3001\u8FFD\u5FC6\u5F80\u4E8B" tabindex="-1"><a class="header-anchor" href="#\u4E00\u3001\u8FFD\u5FC6\u5F80\u4E8B" aria-hidden="true">#</a> \u4E00\u3001\u8FFD\u5FC6\u5F80\u4E8B</h3><p>\u501F\u8FD9\u4E2A\u673A\u4F1A\uFF0C\u548C\u5927\u5BB6\u4E00\u8D77\u5750\u4E0A\u65F6\u5149\u673A\u91CD\u6E29\u4E00\u4E0B\u5F80\u4E8B\u5427\u3002\u7FFB\u770B\u76F8\u518C\uFF0C2021 \u5E74\uFF0C\u8FD8\u771F\u6709\u4E0D\u5C11\u4EE4\u4EBA\u611F\u52A8\u7684\u77AC\u95F4\uFF0C\u592A\u591A\u592A\u591A\u4E86\uFF0C\u6211\u5C31\u6BCF\u4E2A\u6708\u6311\u4E00\u4EF6\u5427\u3002</p><p>1 \u6708 13 \u65E5\uFF0C\u6211\u548C\u59B9\u59B9\u5728\u5C0F\u53D4\u5BB6\u7684\u623F\u9876\u4E0A\u81EA\u62CD\u3002</p><p>2 \u6708 15 \u65E5\uFF0C\u6211\u548C\u5976\u5976\u7684\u5408\u5F71\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/csdn-1000wan-14d7737b-7324-4717-bd16-a3da7f2b1223.png" alt=""></p><p>3 \u6708 26 \u65E5\uFF0C\u8BFB\u8005\u8003\u4E0A\u7814\u7A76\u751F\u4E86\uFF0C\u7279\u610F\u53D1\u6765\u795D\u8D3A\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/csdn-1000wan-63626ad5-8580-4565-a0da-af3a0bf43875.png" alt=""></p><p>4 \u6708 3 \u65E5\uFF0C\u548C\u6559\u7EC3\u5C0F\u59D0\u59D0\u5728\u5065\u8EAB\u623F\u5408\u5F71\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/csdn-1000wan-eb256e24-de8a-49d0-a6ef-eb6d0b8d28e7.png" alt=""></p><p>5 \u6708 25 \u65E5\uFF0C\u4E8C\u54E5\u7684\u8BFB\u8005\u7FA4\u4F53\u6269\u5927\u4E86\u53F0\u6E7E\u7701\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/csdn-1000wan-b2a8a63c-8c8f-4d39-9a9f-acf54c908058.png" alt=""></p><p>6 \u6708 13 \u65E5\uFF0C\u548C\u5BB6\u4EBA\u7545\u6E38\u9752\u5C9B\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/csdn-1000wan-b430951d-544c-4743-b700-3c71a854267a.png" alt=""></p><p>7 \u6708 20 \u65E5\uFF0C\u88AB\u67D0\u67D0\u5973\u7C89\u8FFD\u7740\u8981\u8054\u7CFB\u65B9\u5F0F\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/csdn-1000wan-d7e127c5-5560-45c0-87c8-4cea924047cd.png" alt=""></p><p>8 \u6708 21 \u65E5\uFF0C\u5728\u5341\u516B\u7EBF\u53BF\u57CE\u7684\u8001\u5BB6\u7838\u6838\u6843\u5403\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/csdn-1000wan-944b3f88-86ab-4e86-aeb6-4ad1f4f1ece3.png" alt=""></p><p>9 \u6708 23 \u65E5\uFF0C\u6536\u5230\u6398\u91D1\u548C CSDN \u5BC4\u6765\u7684\u6708\u997C\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/csdn-1000wan-0056fcd2-afa4-475e-ad69-95b84b90b8c7.png" alt=""></p><p>10 \u6708 11 \u65E5\uFF0C\u6536\u5230\u300AJava \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF\u300B\u4E13\u680F\u5728 GitHub \u4E0A\u5F00\u6E90\u4EE5\u6765\u7684\u4E24\u7B14\u5927\u989D\u6253\u8D4F\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/csdn-1000wan-7e6d9918-6d94-45ef-9afa-42882f79944d.png" alt=""></p><p>11 \u6708 6 \u65E5\uFF0C\u548C\u56DB\u4F4D\u6CB3\u79D1\u5927\u7684\u5B66\u5F1F\u64B8\u5B8C\u4E32\u540E\u5728\u6821\u56ED\u91CC\u7684\u5408\u5F71\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/csdn-1000wan-0c1b3624-f4e5-4e0c-b119-0ef4d440a60d.png" alt=""></p><p>12 \u6708 27 \u65E5\uFF0CCSDN \u751F\u6210\u7684\u5E74\u5EA6\u62A5\u544A\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/csdn-1000wan-a070af45-bfeb-4b1a-9b29-745279a4a0fc.png" alt=""></p><p>\u4E0D\u77E5\u9053\u5927\u5BB6\u7684 2021 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diff --git a/dist/assets/daxue-nuli-jisuanji.html.5d9f6906.js b/dist/assets/daxue-nuli-jisuanji.html.ad13ab16.js
similarity index 99%
rename from dist/assets/daxue-nuli-jisuanji.html.5d9f6906.js
rename to dist/assets/daxue-nuli-jisuanji.html.ad13ab16.js
index 4340c615..95ffee47 100644
--- a/dist/assets/daxue-nuli-jisuanji.html.5d9f6906.js
+++ b/dist/assets/daxue-nuli-jisuanji.html.ad13ab16.js
@@ -1 +1 @@
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noreferrer"},m=a("https://www.bilibili.com/video/BV1434y117xE/"),x=n('<p>\u4E0B\u9762\u662F\u6587\u5B57\u7248\uFF0C\u53D1\u51FA\u6765\u7ED9\u516C\u4F17\u53F7\u7684\u8BFB\u8005\u6B23\u8D4F\u4E00\u4E0B\u6211\u8FD9\u5B8C\u7F8E\u65E0\u7F3A\u7684\u5B66\u4E60\u8BA1\u5212\u3002</p><hr><p>\u6211\u5C31\u662F\u554A\u3002</p><ul><li>\u665A\u4E0A 23 \u70B9\u5230\u65E9\u4E0A 7 \u70B9\uFF0C\u7761\u89C9\uFF01</li><li>7 \u70B9\u5230 7.30\uFF0C\u8D56\u5E8A</li><li>7.30 \u5230 8 \u70B9\uFF0C\u6D17\u6F31\u5403\u65E9\u996D</li><li>8\u70B9\u5230 8.10 \u5B66\u4E60\u64CD\u4F5C\u7CFB\u7EDF</li><li>8.10 \u5230 8.20 \u5B66\u4E60\u8BA1\u7B97\u673A\u7EC4\u6210\u539F\u7406</li><li>8.20 \u5230 8.30 \u5B66\u4E60\u8BA1\u7B97\u673A\u7F51\u7EDC</li><li>8.30 \u5230 8.40 \u5B66\u4E60\u6570\u636E\u7ED3\u6784</li><li>8.40 \u5230 8.50 \u5237LeetCode</li><li>8.50 \u5230 9 \u70B9 \u5B66\u4E60\u6570\u636E\u5E93</li><li>9 \u70B9 \u5230 9 \u70B910\u5206 \u5B66\u4E60 Java \u8BED\u8A00</li><li>9.10 \u5230 12\u70B9 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src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/daxue-nuli-jisuanji-2.gif" alt=""></p><p>\u53EA\u8981\u4F60\u5728\u5927\u5B66\u4E00\u5929\uFF0C\u4F60\u5C31\u6709\u8D23\u4EFB\u3001\u6709\u4E49\u52A1\u628A\u81EA\u5DF1\u7684\u5927\u5B66\u751F\u6D3B\u8FC7\u5F97\u5145\u5B9E\uFF0C\u7CBE\u5F69\uFF0C\u522B\u72B9\u8C6B\u4E86\uFF0C\u5377\u8D77\u6765\u5427\uFF01\uFF01\uFF01\uFF01</p><p>\u76F8\u6BD4\u5176\u4ED6\u5927\u90E8\u5206\u4E13\u4E1A\uFF0C\u8BA1\u7B97\u673A\u662F\u771F\u7684\u53EF\u4EE5\u901A\u8FC7\u52AA\u529B\u6539\u53D8\u547D\u8FD0\u7684\u4E13\u4E1A\uFF0C\u4E0D\u770B\u6210\u7EE9\uFF0C\u4E0D\u9650\u51FA\u8EAB\u3002</p><h3 id="\u4E00\u3001\u638C\u63E1\u4FE1\u606F\u6E90" tabindex="-1"><a class="header-anchor" href="#\u4E00\u3001\u638C\u63E1\u4FE1\u606F\u6E90" aria-hidden="true">#</a> \u4E00\u3001\u638C\u63E1\u4FE1\u606F\u6E90</h3><p>\u6211\u521A\u4E0A\u5927\u4E00\u7684\u65F6\u5019\uFF0C\u548C\u6240\u6709\u666E\u901A\u7684\u65B0\u751F\u4E00\u6837\uFF0C\u9762\u5BF9\u5D2D\u65B0\u7684\u5927\u5B66\u751F\u6D3B\uFF0C\u9762\u5BF9\u5E94\u63A5\u4E0D\u6687\u7684\u793E\u56E2\uFF0C\u6709\u70B9\u832B\u7136\u4E0D\u77E5\u6240\u63AA\u3002</p><p>\u77ED\u6682\u7684\u8FF7\u832B\u540E\u6211\u9009\u62E9\u8D70\u51FA\u5BDD\u5BA4\uFF0C\u8D70\u8FDB\u56FE\u4E66\u9986\uFF0C\u6CA1\u60F3\u5230\u7ED3\u8BC6\u4E86\u5F88\u591A\u4F18\u79C0\u7684\u5B66\u957F\u5B66\u59D0\uFF0C\u5927\u5B66\u6700\u52AA\u529B\u7684\u540C\u5B66\u57FA\u672C\u4E0A\u90FD\u5728\u8FD9\u91CC\u3002\u6211\u4E0D\u538C\u5176\u70E6\u5730\u5411\u4ED6\u4EEC\u8BF7\u6559\u95EE\u9898\uFF0C\u4ED6\u4EEC\u90FD\u70ED\u5FC3\u5E2E\u6211\u89E3\u7B54\uFF0C\u4E0D\u5F97\u4E0D\u627F\u8BA4\uFF0C\u4F18\u79C0\u7684\u4EBA\u4ECE\u6765\u90FD\u4E0D\u541D\u556C\u4E8E\u5E2E\u52A9\u4ED6\u4EBA\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/daxue-nuli-jisuanji-3.jpg" alt=""></p><p>\u6211\u5411\u4ED6\u4EEC\u8BF7\u6559\u7684\u95EE\u9898\u6709\uFF1A</p><ul><li>\u56FD\u5BB6\u5956\u5B66\u91D1\u7684\u8BC4\u6BD4\u6761\u4EF6\u6709\u54EA\u4E9B\uFF0C</li><li>\u542B\u91D1\u91CF\u6BD4\u8F83\u9AD8\u7684\u6BD4\u8D5B\u6709\u54EA\u4E9B\uFF0C</li><li>\u5927\u5B66\u671F\u95F4\u5FC5\u987B\u8003\u7684\u8BC1\u4E66\u6709\u54EA\u4E9B\uFF0C</li></ul><p>\u5F53\u540C\u73ED\u540C\u5B66\u90FD\u8FD8\u5728\u8FF7\u832B\u4E0D\u77E5\u6240\u63AA\u7684\u65F6\u5019\uFF0C\u8FD9\u4E9B\u91CD\u8981\u7684\u4FE1\u606F\u6E90\u8BA9\u6211\u6709\u4E86\u5FEB\u4EBA\u4E00\u6B65\u7684\u8D44\u672C\u3002</p><h3 id="\u4E8C\u3001\u4E13\u6CE8\u4E00\u95E8\u7F16\u7A0B\u8BED\u8A00" tabindex="-1"><a class="header-anchor" href="#\u4E8C\u3001\u4E13\u6CE8\u4E00\u95E8\u7F16\u7A0B\u8BED\u8A00" aria-hidden="true">#</a> \u4E8C\u3001\u4E13\u6CE8\u4E00\u95E8\u7F16\u7A0B\u8BED\u8A00</h3><p>\u521A\u5165\u95E8\u7684\u65F6\u5019\uFF0C\u6700\u5927\u7684\u5FCC\u8BB3\u5C31\u662F\u671D\u4E09\u66AE\u56DB\uFF0C\u8FD9\u4E2A\u6708\u5B66 C\u8BED\u8A00\uFF0C\u4E0B\u4E2A\u6708\u5B66 Python\uFF0C\u518D\u4E0B\u4E2A\u6708\u5B66 Java\uFF0C\u4EE5\u81F3\u4E8E\u81EA\u5DF1\u5728\u5165\u95E8\u9636\u6BB5\u5C31\u8FF7\u832B\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/daxue-nuli-jisuanji-4.jpeg" alt=""></p><p>\u6211\u7684\u5EFA\u8BAE\u662F\u6700\u597D\u4E13\u6CE8\u4E8E\u4E00\u95E8\u7F16\u7A0B\u8BED\u8A00\uFF0C\u5982\u679C\u60F3\u8981\u8D70\u4EBA\u5DE5\u667A\u80FD\u8FD9\u6761\u8DEF\u7684\u8BDD\uFF0C\u9009 Python \u5C31\u5BF9\u4E86\uFF1B\u5982\u679C\u60F3\u8D70\u7B97\u6CD5\u5C97\u7684\u8BDD\uFF0C\u53EF\u4EE5\u9009\u62E9 C\u8BED\u8A00\uFF0C\u7136\u540E\u518D\u6DF1\u5165\u5B66\u4E60 C++\uFF0C\u4E4B\u540E\u53BB\u628A LeetCode \u5237\u8D77\u6765\uFF1B\u5982\u679C\u60F3\u672C\u79D1\u6BD5\u4E1A\u5C31\u5DE5\u4F5C\u8D5A\u94B1\u7684\u8BDD\uFF0CJava \u662F\u6700\u4F18\u7684\u9009\u62E9\uFF0C\u5C97\u4F4D\u591A\uFF0C\u85AA\u8D44\u5F85\u9047\u4E5F\u7ED9\u529B\uFF1B\u4EE5\u540E\u4E5F\u53EF\u4EE5\u76F4\u63A5\u8F6Cgo\u5C97\uFF0C\u5982\u679C\u4E0D\u60F3\u90A3\u4E48\u5377\u7684\u8BDD\uFF0C\u524D\u7AEF\u4E5F\u662F\u4E00\u4E2A\u4E0D\u9519\u7684\u9009\u62E9\u3002</p><p>\u4E13\u6CE8\u4E8E\u4E00\u95E8\u7F16\u7A0B\u8BED\u8A00\uFF0C\u80FD\u8BA9\u4F60\u5FEB\u901F\u79EF\u7D2F\u8FD9\u95E8\u7F16\u7A0B\u8BED\u8A00\u7684\u5B66\u4E60\u7ECF\u9A8C\uFF0C\u4EE5\u540E\u60F3\u5207\u6362\u5230\u5176\u4ED6\u7F16\u7A0B\u8BED\u8A00\u7684\u65F6\u5019\uFF0C\u4E5F\u4F1A\u5F97\u5FC3\u5E94\u624B\uFF0C\u6BD5\u7ADF\u7F16\u7A0B\u8BED\u8A00\u4E4B\u95F4\u53EA\u662F\u8BED\u6CD5\u4E0A\u7684\u5DEE\u5F02\u800C\u5DF2\uFF0C\u5E95\u5C42\u7684\u6570\u636E\u7ED3\u6784\uFF0C\u5173\u952E\u7B97\u6CD5\u90FD\u662F\u76F8\u901A\u7684\u3002</p><h3 id="\u4E09\u3001\u591A\u52A8\u624B\u52E4\u5B9E\u8DF5" tabindex="-1"><a class="header-anchor" href="#\u4E09\u3001\u591A\u52A8\u624B\u52E4\u5B9E\u8DF5" aria-hidden="true">#</a> \u4E09\u3001\u591A\u52A8\u624B\u52E4\u5B9E\u8DF5</h3><p>\u5927\u5B66\u56DB\u5E74\uFF0C\u6211\u7684\u6574\u4F53\u89C4\u5212\u662F\uFF0C\u5927\u4E00\u65F6\u5165\u95E8\uFF0C\u5927\u4E8C\u65F6\u592F\u5B9E\u57FA\u7840\uFF0C\u5927\u4E09\u65F6\u62FC\u547D\u5377\uFF0C\u5927\u56DB\u65F6\u597D\u597D\u51C6\u5907\u6821\u62DB\uFF0C\u80FD\u65E9\u70B9\u51FA\u53BB\u5B9E\u4E60\u5C31\u65E9\u70B9\u53BB\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/daxue-nuli-jisuanji-5.jpg" alt=""></p><p>\u81F3\u4E8E\u5B66\u4E60\u8D44\u6599\uFF0C\u7F51\u4E0A\u5DF2\u7ECF\u6709\u5F88\u591A\u514D\u8D39\u5F00\u6E90\u7684\u4E86\uFF0C\u5E76\u4E14\u7EDD\u5927\u591A\u6570\u90FD\u975E\u5E38\u7684\u4F18\u8D28\uFF0C\u53EA\u8981\u4F60\u80AF\u82B1\u65F6\u95F4\u53BB\u7B5B\u9009\u548C\u6574\u7406\u3002</p><p>\u8FD9\u662F\u6211\u81EA\u5DF1\u6574\u7406\u7684\u4E00\u5957\uFF0C\u504F Java \u540E\u7AEF\u8DEF\u7EBF\u7684 PDF \u4E66\u5355\uFF0C\u5728GitHub\u4E0A\u4E5F\u67093\u30026k\u7684star\u4E86\uFF0C\u8BF4\u660E\u5F88\u591A\u5C0F\u4F19\u4F34\u90FD\u5F88\u8BA4\u53EF\uFF0C\u5305\u62EC\u5165\u95E8\u2192\u5DE5\u5177\u2192\u6846\u67B6\u2192\u6570\u636E\u5E93\u2192\u5E76\u53D1\u7F16\u7A0B\u2192jvm\u2192\u6027\u80FD\u4F18\u5316\u2192\u8BBE\u8BA1\u6A21\u5F0F\u2192\u64CD\u4F5C\u7CFB\u7EDF\u2192\u8BA1\u7B97\u673A\u7F51\u7EDC\u2192\u6570\u636E\u7ED3\u6784\u4E0E\u7B97\u6CD5\u2192\u9762\u8BD5\u2192\u67B6\u6784\u7B49\u7B49\uFF0C\u53EF\u4EE5\u8BF4\u975E\u5E38\u7684\u5168\u9762\u548C\u7CFB\u7EDF\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/daxue-nuli-jisuanji-6.jpg" alt=""></p><p>\u4F60\u4E5F\u53EF\u4EE5\u62FF\u6765\u4F5C\u4E3A\u53C2\u8003\u3002</p><p>\u5B66\u4E60\u7684\u65F6\u5019\u8BB0\u4F4F\u4E00\u70B9\uFF0C\u4E00\u5B9A\u8981\u591A\u52A8\u624B\u52E4\u5B9E\u8DF5\uFF0C\u5207\u5FCC\u773C\u9AD8\u624B\u4F4E\u3002</p><p>\u5F88\u591A\u5C0F\u4F19\u4F34\u7ECF\u5E38\u627E\u6211\u53CD\u9988\u8BF4\u81EA\u5DF1\u5B66\u5B8C\u5C31\u5FD8\uFF0C\u770B\u7684\u65F6\u5019\u660E\u660E\u767D\u767D\uFF0C\u4E00\u5230\u6572\u4EE3\u7801\u73AF\u8282\u4EBA\u5C31\u50BB\u4E86\u3002\u80CC\u540E\u7684\u539F\u56E0\u5176\u5B9E\u5F88\u7B80\u5355\uFF0C\u5C31\u662F\u56E0\u4E3A\u52A8\u624B\u5C11\uFF0C\u6CA1\u6709\u601D\u7EF4\u8BB0\u5FC6\uFF0C\u6CA1\u6709\u808C\u8089\u8BB0\u5FC6\u3002</p><p>\u6240\u4EE5\u8BF4\u6211\u7684\u5EFA\u8BAE\u662F\u4EE3\u7801\u6572\u8D77\u6765\uFF0C\u7B14\u8BB0\u8BB0\u8D77\u6765\uFF01</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/daxue-nuli-jisuanji-7.gif" alt=""></p><p>\u8BB0\u4F4F\u5356\u6CB9\u7FC1\u7684\u90A3\u53E5\u8BDD\uFF1A\u65E0\u4ED6\uFF0C\u552F\u624B\u719F\u5C14\uFF01</p><h3 id="\u56DB\u3001\u65E9\u6295\u7B80\u5386\u65E9\u5B9E\u4E60" tabindex="-1"><a class="header-anchor" href="#\u56DB\u3001\u65E9\u6295\u7B80\u5386\u65E9\u5B9E\u4E60" aria-hidden="true">#</a> \u56DB\u3001\u65E9\u6295\u7B80\u5386\u65E9\u5B9E\u4E60</h3><p>\u5982\u679C\u4E0D\u6253\u7B97\u8003\u7814\u7684\u8BDD\uFF0C\u4E00\u5B9A\u8981\u65E9\u6295\u7B80\u5386\u65E9\u5B9E\u4E60\u3002</p><p>\u8BB0\u5F97\u5927\u4E09\u5BD2\u5047\u7684\u65F6\u5019\uFF0C\u5F88\u591A\u540C\u5B66\u90FD\u56DE\u5BB6\u8FC7\u5E74\u4E86\uFF0C\u6211\u4E00\u4E2A\u4EBA\u9009\u62E9\u5357\u4E0B\u82CF\u5DDE\u53BB \uFF0C\u672C\u4EE5\u4E3A\u80FD\u627E\u4E00\u4E2A\u5B9E\u4E60\u5C31\u5F88\u4E0D\u9519\u4E86\uFF0C\u6CA1\u60F3\u5230\u597D\u51E0\u4E2A\u516C\u53F8\u7684\u9762\u8BD5\u90FD\u8FC7\u4E86\uFF0C\u8FD9\u7ED9\u4E86\u6211\u5F88\u5927\u7684\u4FE1\u5FC3\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/daxue-nuli-jisuanji-8.jpeg" alt=""></p><p>\u5510\u4EE3\u8BD7\u4EBA\u5218\u79B9\u9521\u6709\u53E5\u8BD7\u662F\u8FD9\u6837\u5199\u7684\uFF1A<strong>\u5343\u6DD8\u4E07\u6F09\u867D\u8F9B\u82E6\uFF0C\u5439\u5C3D\u72C2\u6C99\u59CB\u5230\u91D1</strong>\u3002</p><p>\u52AA\u529B\u867D\u597D\uFF0C\u5374\u4E5F\u8981\u8D81\u65E9\u884C\u52A8\uFF0C\u5343\u4E07\u4E0D\u8981\u4E00\u76F4\u57CB\u5934\u82E6\u5B66\uFF0C\u8BE5\u4EAE\u5251\u7684\u65F6\u5019\u5C31\u8981\u8D81\u65E9\u4EAE\u3002\u6BD5\u7ADF\u65E9\u5C31\u662F\u4F18\u52BF\u554A\u3002</p><p>\u597D\u597D\u51C6\u5907\u4E00\u4EFD\u7B80\u5386\uFF0C\u7136\u540E\u53BB\u6295\u81EA\u5DF1\u5FC3\u4EEA\u7684\u516C\u53F8\uFF0C\u4ECE\u6613\u5230\u96BE\uFF0C\u4E0D\u8981\u4E00\u5F00\u59CB\u5C31\u6295\u81EA\u5DF1\u6700\u5FC3\u4EEA\u7684\u90A3\u4E2A\uFF0C\u7ED9\u81EA\u5DF1\u4E00\u4E2A\u7F13\u51B2\u7684\u673A\u4F1A\uFF0C\u79EF\u6512\u4E00\u4E9B\u9762\u8BD5\u7684\u7ECF\u9A8C\u3002</p><p>\u4E00\u6B21\u9762\u8BD5\u6302\u4E86\u4E0D\u8981\u7D27\uFF0C\u4E8C\u6B21\u9762\u8BD5\u6302\u4E86\u4E0D\u8981\u7D27\uFF0C\u5373\u4FBF\u5341\u6B21\u3001\u4E8C\u5341\u6B21\u4E5F\u4E0D\u8981\u6C14\u9981\uFF0C\u591A\u603B\u7ED3\uFF0C\u591A\u53CD\u601D\uFF0C\u7ECF\u9A8C\u90FD\u662F\u5728\u5B9E\u6218\u4E2D\u83B7\u5F97\u7684\u3002</p><h3 id="\u4E94\u3001\u4E00\u70B9\u5FC3\u91CC\u8BDD" tabindex="-1"><a class="header-anchor" href="#\u4E94\u3001\u4E00\u70B9\u5FC3\u91CC\u8BDD" aria-hidden="true">#</a> \u4E94\u3001\u4E00\u70B9\u5FC3\u91CC\u8BDD</h3><p>\u8FD9\u4E2A\u4E16\u754C\u4E0A\u672C\u6CA1\u6709\u5927\u795E\u5B66\u9738\uFF0C\u4E00\u5207\u90FD\u53EA\u662F\u539A\u79EF\u8584\u53D1\uFF0C\u5927\u5B66\u662F\u4EBA\u751F\u6700\u7F8E\u597D\u7684\u9636\u6BB5\uFF0C\u65E5\u590D\u4E00\u65E5\u7684\u52AA\u529B\uFF0C\u4F60\u7EC8\u5C06\u4F1A\u201C\u4E58\u98CE\u7834\u6D6A\uFF0C\u76F4\u6302\u4E91\u5E06\u201D\u3002</p>',42);function _(g,v){const i=l("ExternalLinkIcon");return o(),r("div",null,[c,d,h,u,b,e("blockquote",null,[e("p",null,[e("a",j,[m,p(i)])])]),x])}var C=t(s,[["render",_],["__file","daxue-nuli-jisuanji.html.vue"]]);export{C as default};
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noreferrer"},m=a("https://www.bilibili.com/video/BV1434y117xE/"),x=n('<p>\u4E0B\u9762\u662F\u6587\u5B57\u7248\uFF0C\u53D1\u51FA\u6765\u7ED9\u516C\u4F17\u53F7\u7684\u8BFB\u8005\u6B23\u8D4F\u4E00\u4E0B\u6211\u8FD9\u5B8C\u7F8E\u65E0\u7F3A\u7684\u5B66\u4E60\u8BA1\u5212\u3002</p><hr><p>\u6211\u5C31\u662F\u554A\u3002</p><ul><li>\u665A\u4E0A 23 \u70B9\u5230\u65E9\u4E0A 7 \u70B9\uFF0C\u7761\u89C9\uFF01</li><li>7 \u70B9\u5230 7.30\uFF0C\u8D56\u5E8A</li><li>7.30 \u5230 8 \u70B9\uFF0C\u6D17\u6F31\u5403\u65E9\u996D</li><li>8\u70B9\u5230 8.10 \u5B66\u4E60\u64CD\u4F5C\u7CFB\u7EDF</li><li>8.10 \u5230 8.20 \u5B66\u4E60\u8BA1\u7B97\u673A\u7EC4\u6210\u539F\u7406</li><li>8.20 \u5230 8.30 \u5B66\u4E60\u8BA1\u7B97\u673A\u7F51\u7EDC</li><li>8.30 \u5230 8.40 \u5B66\u4E60\u6570\u636E\u7ED3\u6784</li><li>8.40 \u5230 8.50 \u5237LeetCode</li><li>8.50 \u5230 9 \u70B9 \u5B66\u4E60\u6570\u636E\u5E93</li><li>9 \u70B9 \u5230 9 \u70B910\u5206 \u5B66\u4E60 Java \u8BED\u8A00</li><li>9.10 \u5230 12\u70B9 \u5237\u4E00\u4F1A\u4F1A\u5C0F\u59D0\u59D0\u89C6\u9891\uFF0C\u4F11\u606F\u4E0B\u773C\u775B</li><li>12.00 \u5230 13.00 \u5348\u996D\u5348\u4F11\u65F6\u95F4</li><li>13.00 \u5230 13.10 \u5B66\u4E60 go \u8BED\u8A00</li><li>13.10 \u5230 13.20 \u5B66\u4E60 Python \u8BED\u8A00</li><li>13.20 \u5230 13.30 \u5B66\u4E60 C \u8BED\u8A00</li><li>13.30 \u5230 18\u70B9 \u6253\u4E00\u4F1A\u4F1A\u738B\u8005\uFF0C\u653E\u677E\u4E0B</li><li>18.00 \u5230 19.00 \u665A\u996D\u65F6\u95F4</li><li>19.00 \u5230 19.10 \u80CC Java \u516B\u80A1\u6587</li><li>19.10 \u5230 19.20 \u5237 JavaGuide \u9762\u8BD5\u9898</li><li>19.20 \u5230 23 \u70B9 \u548C\u5973\u670B\u53CB\u804A\u804A\u5929\uFF0C\u7EF4\u62A4\u4E00\u4E0B\u611F\u60C5</li></ul><p>\u53EF\u4EE5\u770B\u5F97\u51FA\uFF0C\u6211\u8FD9\u4E2A\u5B66\u4E60\u8BA1\u5212\u5B89\u6392\u5F97\u975E\u5E38\u5408\u7406\uFF0C\u52B3\u9038\u7ED3\u5408\uFF0C\u4E0D\u6D6A\u8D39\u4E00\u5206\u4E00\u79D2\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/daxue-nuli-jisuanji-2.gif" alt=""></p><p>\u53EA\u8981\u4F60\u5728\u5927\u5B66\u4E00\u5929\uFF0C\u4F60\u5C31\u6709\u8D23\u4EFB\u3001\u6709\u4E49\u52A1\u628A\u81EA\u5DF1\u7684\u5927\u5B66\u751F\u6D3B\u8FC7\u5F97\u5145\u5B9E\uFF0C\u7CBE\u5F69\uFF0C\u522B\u72B9\u8C6B\u4E86\uFF0C\u5377\u8D77\u6765\u5427\uFF01\uFF01\uFF01\uFF01</p><p>\u76F8\u6BD4\u5176\u4ED6\u5927\u90E8\u5206\u4E13\u4E1A\uFF0C\u8BA1\u7B97\u673A\u662F\u771F\u7684\u53EF\u4EE5\u901A\u8FC7\u52AA\u529B\u6539\u53D8\u547D\u8FD0\u7684\u4E13\u4E1A\uFF0C\u4E0D\u770B\u6210\u7EE9\uFF0C\u4E0D\u9650\u51FA\u8EAB\u3002</p><h3 id="\u4E00\u3001\u638C\u63E1\u4FE1\u606F\u6E90" tabindex="-1"><a class="header-anchor" href="#\u4E00\u3001\u638C\u63E1\u4FE1\u606F\u6E90" aria-hidden="true">#</a> \u4E00\u3001\u638C\u63E1\u4FE1\u606F\u6E90</h3><p>\u6211\u521A\u4E0A\u5927\u4E00\u7684\u65F6\u5019\uFF0C\u548C\u6240\u6709\u666E\u901A\u7684\u65B0\u751F\u4E00\u6837\uFF0C\u9762\u5BF9\u5D2D\u65B0\u7684\u5927\u5B66\u751F\u6D3B\uFF0C\u9762\u5BF9\u5E94\u63A5\u4E0D\u6687\u7684\u793E\u56E2\uFF0C\u6709\u70B9\u832B\u7136\u4E0D\u77E5\u6240\u63AA\u3002</p><p>\u77ED\u6682\u7684\u8FF7\u832B\u540E\u6211\u9009\u62E9\u8D70\u51FA\u5BDD\u5BA4\uFF0C\u8D70\u8FDB\u56FE\u4E66\u9986\uFF0C\u6CA1\u60F3\u5230\u7ED3\u8BC6\u4E86\u5F88\u591A\u4F18\u79C0\u7684\u5B66\u957F\u5B66\u59D0\uFF0C\u5927\u5B66\u6700\u52AA\u529B\u7684\u540C\u5B66\u57FA\u672C\u4E0A\u90FD\u5728\u8FD9\u91CC\u3002\u6211\u4E0D\u538C\u5176\u70E6\u5730\u5411\u4ED6\u4EEC\u8BF7\u6559\u95EE\u9898\uFF0C\u4ED6\u4EEC\u90FD\u70ED\u5FC3\u5E2E\u6211\u89E3\u7B54\uFF0C\u4E0D\u5F97\u4E0D\u627F\u8BA4\uFF0C\u4F18\u79C0\u7684\u4EBA\u4ECE\u6765\u90FD\u4E0D\u541D\u556C\u4E8E\u5E2E\u52A9\u4ED6\u4EBA\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/daxue-nuli-jisuanji-3.jpg" alt=""></p><p>\u6211\u5411\u4ED6\u4EEC\u8BF7\u6559\u7684\u95EE\u9898\u6709\uFF1A</p><ul><li>\u56FD\u5BB6\u5956\u5B66\u91D1\u7684\u8BC4\u6BD4\u6761\u4EF6\u6709\u54EA\u4E9B\uFF0C</li><li>\u542B\u91D1\u91CF\u6BD4\u8F83\u9AD8\u7684\u6BD4\u8D5B\u6709\u54EA\u4E9B\uFF0C</li><li>\u5927\u5B66\u671F\u95F4\u5FC5\u987B\u8003\u7684\u8BC1\u4E66\u6709\u54EA\u4E9B\uFF0C</li></ul><p>\u5F53\u540C\u73ED\u540C\u5B66\u90FD\u8FD8\u5728\u8FF7\u832B\u4E0D\u77E5\u6240\u63AA\u7684\u65F6\u5019\uFF0C\u8FD9\u4E9B\u91CD\u8981\u7684\u4FE1\u606F\u6E90\u8BA9\u6211\u6709\u4E86\u5FEB\u4EBA\u4E00\u6B65\u7684\u8D44\u672C\u3002</p><h3 id="\u4E8C\u3001\u4E13\u6CE8\u4E00\u95E8\u7F16\u7A0B\u8BED\u8A00" tabindex="-1"><a class="header-anchor" href="#\u4E8C\u3001\u4E13\u6CE8\u4E00\u95E8\u7F16\u7A0B\u8BED\u8A00" aria-hidden="true">#</a> \u4E8C\u3001\u4E13\u6CE8\u4E00\u95E8\u7F16\u7A0B\u8BED\u8A00</h3><p>\u521A\u5165\u95E8\u7684\u65F6\u5019\uFF0C\u6700\u5927\u7684\u5FCC\u8BB3\u5C31\u662F\u671D\u4E09\u66AE\u56DB\uFF0C\u8FD9\u4E2A\u6708\u5B66 C\u8BED\u8A00\uFF0C\u4E0B\u4E2A\u6708\u5B66 Python\uFF0C\u518D\u4E0B\u4E2A\u6708\u5B66 Java\uFF0C\u4EE5\u81F3\u4E8E\u81EA\u5DF1\u5728\u5165\u95E8\u9636\u6BB5\u5C31\u8FF7\u832B\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/daxue-nuli-jisuanji-4.jpeg" alt=""></p><p>\u6211\u7684\u5EFA\u8BAE\u662F\u6700\u597D\u4E13\u6CE8\u4E8E\u4E00\u95E8\u7F16\u7A0B\u8BED\u8A00\uFF0C\u5982\u679C\u60F3\u8981\u8D70\u4EBA\u5DE5\u667A\u80FD\u8FD9\u6761\u8DEF\u7684\u8BDD\uFF0C\u9009 Python \u5C31\u5BF9\u4E86\uFF1B\u5982\u679C\u60F3\u8D70\u7B97\u6CD5\u5C97\u7684\u8BDD\uFF0C\u53EF\u4EE5\u9009\u62E9 C\u8BED\u8A00\uFF0C\u7136\u540E\u518D\u6DF1\u5165\u5B66\u4E60 C++\uFF0C\u4E4B\u540E\u53BB\u628A LeetCode \u5237\u8D77\u6765\uFF1B\u5982\u679C\u60F3\u672C\u79D1\u6BD5\u4E1A\u5C31\u5DE5\u4F5C\u8D5A\u94B1\u7684\u8BDD\uFF0CJava \u662F\u6700\u4F18\u7684\u9009\u62E9\uFF0C\u5C97\u4F4D\u591A\uFF0C\u85AA\u8D44\u5F85\u9047\u4E5F\u7ED9\u529B\uFF1B\u4EE5\u540E\u4E5F\u53EF\u4EE5\u76F4\u63A5\u8F6Cgo\u5C97\uFF0C\u5982\u679C\u4E0D\u60F3\u90A3\u4E48\u5377\u7684\u8BDD\uFF0C\u524D\u7AEF\u4E5F\u662F\u4E00\u4E2A\u4E0D\u9519\u7684\u9009\u62E9\u3002</p><p>\u4E13\u6CE8\u4E8E\u4E00\u95E8\u7F16\u7A0B\u8BED\u8A00\uFF0C\u80FD\u8BA9\u4F60\u5FEB\u901F\u79EF\u7D2F\u8FD9\u95E8\u7F16\u7A0B\u8BED\u8A00\u7684\u5B66\u4E60\u7ECF\u9A8C\uFF0C\u4EE5\u540E\u60F3\u5207\u6362\u5230\u5176\u4ED6\u7F16\u7A0B\u8BED\u8A00\u7684\u65F6\u5019\uFF0C\u4E5F\u4F1A\u5F97\u5FC3\u5E94\u624B\uFF0C\u6BD5\u7ADF\u7F16\u7A0B\u8BED\u8A00\u4E4B\u95F4\u53EA\u662F\u8BED\u6CD5\u4E0A\u7684\u5DEE\u5F02\u800C\u5DF2\uFF0C\u5E95\u5C42\u7684\u6570\u636E\u7ED3\u6784\uFF0C\u5173\u952E\u7B97\u6CD5\u90FD\u662F\u76F8\u901A\u7684\u3002</p><h3 id="\u4E09\u3001\u591A\u52A8\u624B\u52E4\u5B9E\u8DF5" tabindex="-1"><a class="header-anchor" href="#\u4E09\u3001\u591A\u52A8\u624B\u52E4\u5B9E\u8DF5" aria-hidden="true">#</a> \u4E09\u3001\u591A\u52A8\u624B\u52E4\u5B9E\u8DF5</h3><p>\u5927\u5B66\u56DB\u5E74\uFF0C\u6211\u7684\u6574\u4F53\u89C4\u5212\u662F\uFF0C\u5927\u4E00\u65F6\u5165\u95E8\uFF0C\u5927\u4E8C\u65F6\u592F\u5B9E\u57FA\u7840\uFF0C\u5927\u4E09\u65F6\u62FC\u547D\u5377\uFF0C\u5927\u56DB\u65F6\u597D\u597D\u51C6\u5907\u6821\u62DB\uFF0C\u80FD\u65E9\u70B9\u51FA\u53BB\u5B9E\u4E60\u5C31\u65E9\u70B9\u53BB\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/daxue-nuli-jisuanji-5.jpg" alt=""></p><p>\u81F3\u4E8E\u5B66\u4E60\u8D44\u6599\uFF0C\u7F51\u4E0A\u5DF2\u7ECF\u6709\u5F88\u591A\u514D\u8D39\u5F00\u6E90\u7684\u4E86\uFF0C\u5E76\u4E14\u7EDD\u5927\u591A\u6570\u90FD\u975E\u5E38\u7684\u4F18\u8D28\uFF0C\u53EA\u8981\u4F60\u80AF\u82B1\u65F6\u95F4\u53BB\u7B5B\u9009\u548C\u6574\u7406\u3002</p><p>\u8FD9\u662F\u6211\u81EA\u5DF1\u6574\u7406\u7684\u4E00\u5957\uFF0C\u504F Java \u540E\u7AEF\u8DEF\u7EBF\u7684 PDF \u4E66\u5355\uFF0C\u5728GitHub\u4E0A\u4E5F\u67093\u30026k\u7684star\u4E86\uFF0C\u8BF4\u660E\u5F88\u591A\u5C0F\u4F19\u4F34\u90FD\u5F88\u8BA4\u53EF\uFF0C\u5305\u62EC\u5165\u95E8\u2192\u5DE5\u5177\u2192\u6846\u67B6\u2192\u6570\u636E\u5E93\u2192\u5E76\u53D1\u7F16\u7A0B\u2192jvm\u2192\u6027\u80FD\u4F18\u5316\u2192\u8BBE\u8BA1\u6A21\u5F0F\u2192\u64CD\u4F5C\u7CFB\u7EDF\u2192\u8BA1\u7B97\u673A\u7F51\u7EDC\u2192\u6570\u636E\u7ED3\u6784\u4E0E\u7B97\u6CD5\u2192\u9762\u8BD5\u2192\u67B6\u6784\u7B49\u7B49\uFF0C\u53EF\u4EE5\u8BF4\u975E\u5E38\u7684\u5168\u9762\u548C\u7CFB\u7EDF\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/daxue-nuli-jisuanji-6.jpg" alt=""></p><p>\u4F60\u4E5F\u53EF\u4EE5\u62FF\u6765\u4F5C\u4E3A\u53C2\u8003\u3002</p><p>\u5B66\u4E60\u7684\u65F6\u5019\u8BB0\u4F4F\u4E00\u70B9\uFF0C\u4E00\u5B9A\u8981\u591A\u52A8\u624B\u52E4\u5B9E\u8DF5\uFF0C\u5207\u5FCC\u773C\u9AD8\u624B\u4F4E\u3002</p><p>\u5F88\u591A\u5C0F\u4F19\u4F34\u7ECF\u5E38\u627E\u6211\u53CD\u9988\u8BF4\u81EA\u5DF1\u5B66\u5B8C\u5C31\u5FD8\uFF0C\u770B\u7684\u65F6\u5019\u660E\u660E\u767D\u767D\uFF0C\u4E00\u5230\u6572\u4EE3\u7801\u73AF\u8282\u4EBA\u5C31\u50BB\u4E86\u3002\u80CC\u540E\u7684\u539F\u56E0\u5176\u5B9E\u5F88\u7B80\u5355\uFF0C\u5C31\u662F\u56E0\u4E3A\u52A8\u624B\u5C11\uFF0C\u6CA1\u6709\u601D\u7EF4\u8BB0\u5FC6\uFF0C\u6CA1\u6709\u808C\u8089\u8BB0\u5FC6\u3002</p><p>\u6240\u4EE5\u8BF4\u6211\u7684\u5EFA\u8BAE\u662F\u4EE3\u7801\u6572\u8D77\u6765\uFF0C\u7B14\u8BB0\u8BB0\u8D77\u6765\uFF01</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/daxue-nuli-jisuanji-7.gif" alt=""></p><p>\u8BB0\u4F4F\u5356\u6CB9\u7FC1\u7684\u90A3\u53E5\u8BDD\uFF1A\u65E0\u4ED6\uFF0C\u552F\u624B\u719F\u5C14\uFF01</p><h3 id="\u56DB\u3001\u65E9\u6295\u7B80\u5386\u65E9\u5B9E\u4E60" tabindex="-1"><a class="header-anchor" href="#\u56DB\u3001\u65E9\u6295\u7B80\u5386\u65E9\u5B9E\u4E60" aria-hidden="true">#</a> \u56DB\u3001\u65E9\u6295\u7B80\u5386\u65E9\u5B9E\u4E60</h3><p>\u5982\u679C\u4E0D\u6253\u7B97\u8003\u7814\u7684\u8BDD\uFF0C\u4E00\u5B9A\u8981\u65E9\u6295\u7B80\u5386\u65E9\u5B9E\u4E60\u3002</p><p>\u8BB0\u5F97\u5927\u4E09\u5BD2\u5047\u7684\u65F6\u5019\uFF0C\u5F88\u591A\u540C\u5B66\u90FD\u56DE\u5BB6\u8FC7\u5E74\u4E86\uFF0C\u6211\u4E00\u4E2A\u4EBA\u9009\u62E9\u5357\u4E0B\u82CF\u5DDE\u53BB \uFF0C\u672C\u4EE5\u4E3A\u80FD\u627E\u4E00\u4E2A\u5B9E\u4E60\u5C31\u5F88\u4E0D\u9519\u4E86\uFF0C\u6CA1\u60F3\u5230\u597D\u51E0\u4E2A\u516C\u53F8\u7684\u9762\u8BD5\u90FD\u8FC7\u4E86\uFF0C\u8FD9\u7ED9\u4E86\u6211\u5F88\u5927\u7684\u4FE1\u5FC3\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/daxue-nuli-jisuanji-8.jpeg" alt=""></p><p>\u5510\u4EE3\u8BD7\u4EBA\u5218\u79B9\u9521\u6709\u53E5\u8BD7\u662F\u8FD9\u6837\u5199\u7684\uFF1A<strong>\u5343\u6DD8\u4E07\u6F09\u867D\u8F9B\u82E6\uFF0C\u5439\u5C3D\u72C2\u6C99\u59CB\u5230\u91D1</strong>\u3002</p><p>\u52AA\u529B\u867D\u597D\uFF0C\u5374\u4E5F\u8981\u8D81\u65E9\u884C\u52A8\uFF0C\u5343\u4E07\u4E0D\u8981\u4E00\u76F4\u57CB\u5934\u82E6\u5B66\uFF0C\u8BE5\u4EAE\u5251\u7684\u65F6\u5019\u5C31\u8981\u8D81\u65E9\u4EAE\u3002\u6BD5\u7ADF\u65E9\u5C31\u662F\u4F18\u52BF\u554A\u3002</p><p>\u597D\u597D\u51C6\u5907\u4E00\u4EFD\u7B80\u5386\uFF0C\u7136\u540E\u53BB\u6295\u81EA\u5DF1\u5FC3\u4EEA\u7684\u516C\u53F8\uFF0C\u4ECE\u6613\u5230\u96BE\uFF0C\u4E0D\u8981\u4E00\u5F00\u59CB\u5C31\u6295\u81EA\u5DF1\u6700\u5FC3\u4EEA\u7684\u90A3\u4E2A\uFF0C\u7ED9\u81EA\u5DF1\u4E00\u4E2A\u7F13\u51B2\u7684\u673A\u4F1A\uFF0C\u79EF\u6512\u4E00\u4E9B\u9762\u8BD5\u7684\u7ECF\u9A8C\u3002</p><p>\u4E00\u6B21\u9762\u8BD5\u6302\u4E86\u4E0D\u8981\u7D27\uFF0C\u4E8C\u6B21\u9762\u8BD5\u6302\u4E86\u4E0D\u8981\u7D27\uFF0C\u5373\u4FBF\u5341\u6B21\u3001\u4E8C\u5341\u6B21\u4E5F\u4E0D\u8981\u6C14\u9981\uFF0C\u591A\u603B\u7ED3\uFF0C\u591A\u53CD\u601D\uFF0C\u7ECF\u9A8C\u90FD\u662F\u5728\u5B9E\u6218\u4E2D\u83B7\u5F97\u7684\u3002</p><h3 id="\u4E94\u3001\u4E00\u70B9\u5FC3\u91CC\u8BDD" tabindex="-1"><a class="header-anchor" href="#\u4E94\u3001\u4E00\u70B9\u5FC3\u91CC\u8BDD" aria-hidden="true">#</a> \u4E94\u3001\u4E00\u70B9\u5FC3\u91CC\u8BDD</h3><p>\u8FD9\u4E2A\u4E16\u754C\u4E0A\u672C\u6CA1\u6709\u5927\u795E\u5B66\u9738\uFF0C\u4E00\u5207\u90FD\u53EA\u662F\u539A\u79EF\u8584\u53D1\uFF0C\u5927\u5B66\u662F\u4EBA\u751F\u6700\u7F8E\u597D\u7684\u9636\u6BB5\uFF0C\u65E5\u590D\u4E00\u65E5\u7684\u52AA\u529B\uFF0C\u4F60\u7EC8\u5C06\u4F1A\u201C\u4E58\u98CE\u7834\u6D6A\uFF0C\u76F4\u6302\u4E91\u5E06\u201D\u3002</p>',42);function _(g,v){const i=l("ExternalLinkIcon");return o(),r("div",null,[c,d,h,u,b,e("blockquote",null,[e("p",null,[e("a",j,[m,p(i)])])]),x])}var C=t(s,[["render",_],["__file","daxue-nuli-jisuanji.html.vue"]]);export{C as default};
diff --git a/dist/assets/deep-copy.html.b6383852.js b/dist/assets/deep-copy.html.1b203746.js
similarity index 99%
rename from dist/assets/deep-copy.html.b6383852.js
rename to dist/assets/deep-copy.html.1b203746.js
index 7b310596..9d4e6e72 100644
--- a/dist/assets/deep-copy.html.b6383852.js
+++ b/dist/assets/deep-copy.html.1b203746.js
@@ -1,4 +1,4 @@
-import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e as t}from"./app.a0271b9c.js";const e={},p=t(`<h1 id="\u5F7B\u5E95\u8BB2\u660E\u767D\u7684java\u6D45\u62F7\u8D1D\u4E0E\u6DF1\u62F7\u8D1D" tabindex="-1"><a class="header-anchor" href="#\u5F7B\u5E95\u8BB2\u660E\u767D\u7684java\u6D45\u62F7\u8D1D\u4E0E\u6DF1\u62F7\u8D1D" aria-hidden="true">#</a> \u5F7B\u5E95\u8BB2\u660E\u767D\u7684Java\u6D45\u62F7\u8D1D\u4E0E\u6DF1\u62F7\u8D1D</h1><p>\u201C\u54E5\uFF0C\u542C\u8BF4\u6D45\u62F7\u8D1D\u548C\u6DF1\u62F7\u8D1D\u662F Java \u9762\u8BD5\u4E2D\u7ECF\u5E38\u4F1A\u88AB\u95EE\u5230\u7684\u4E00\u4E2A\u95EE\u9898\uFF0C\u662F\u8FD9\u6837\u5417\uFF1F\u201D</p><p>\u201C\u8FD8\u771F\u7684\u662F\uFF0C\u800C\u4E14\u4E86\u89E3\u6D45\u62F7\u8D1D\u548C\u6DF1\u62F7\u8D1D\u7684\u539F\u7406\uFF0C\u5BF9 Java \u662F\u503C\u4F20\u9012\u8FD8\u662F\u5F15\u7528\u4F20\u9012\u4E5F\u4F1A\u6709\u66F4\u6DF1\u7684\u7406\u89E3\u3002\u201D\u6211\u80AF\u5B9A\u5730\u56DE\u7B54\u3002</p><p>\u201C\u4E0D\u7BA1\u662F\u6D45\u62F7\u8D1D\u8FD8\u662F\u6DF1\u62F7\u8D1D\uFF0C\u90FD\u53EF\u4EE5\u901A\u8FC7\u8C03\u7528 Object \u7C7B\u7684 <code>clone()</code> \u65B9\u6CD5\u6765\u5B8C\u6210\u3002\u201D\u6211\u4E00\u8FB9\u8BF4\uFF0C\u4E00\u8FB9\u6253\u5F00 Intellij IDEA\uFF0C\u5E76\u627E\u5230\u4E86 <code>clone()</code> \u65B9\u6CD5\u7684\u6E90\u7801\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token annotation punctuation">@HotSpotIntrinsicCandidate</span>
+import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e as t}from"./app.615e41d8.js";const e={},p=t(`<h1 id="\u5F7B\u5E95\u8BB2\u660E\u767D\u7684java\u6D45\u62F7\u8D1D\u4E0E\u6DF1\u62F7\u8D1D" tabindex="-1"><a class="header-anchor" href="#\u5F7B\u5E95\u8BB2\u660E\u767D\u7684java\u6D45\u62F7\u8D1D\u4E0E\u6DF1\u62F7\u8D1D" aria-hidden="true">#</a> \u5F7B\u5E95\u8BB2\u660E\u767D\u7684Java\u6D45\u62F7\u8D1D\u4E0E\u6DF1\u62F7\u8D1D</h1><p>\u201C\u54E5\uFF0C\u542C\u8BF4\u6D45\u62F7\u8D1D\u548C\u6DF1\u62F7\u8D1D\u662F Java \u9762\u8BD5\u4E2D\u7ECF\u5E38\u4F1A\u88AB\u95EE\u5230\u7684\u4E00\u4E2A\u95EE\u9898\uFF0C\u662F\u8FD9\u6837\u5417\uFF1F\u201D</p><p>\u201C\u8FD8\u771F\u7684\u662F\uFF0C\u800C\u4E14\u4E86\u89E3\u6D45\u62F7\u8D1D\u548C\u6DF1\u62F7\u8D1D\u7684\u539F\u7406\uFF0C\u5BF9 Java \u662F\u503C\u4F20\u9012\u8FD8\u662F\u5F15\u7528\u4F20\u9012\u4E5F\u4F1A\u6709\u66F4\u6DF1\u7684\u7406\u89E3\u3002\u201D\u6211\u80AF\u5B9A\u5730\u56DE\u7B54\u3002</p><p>\u201C\u4E0D\u7BA1\u662F\u6D45\u62F7\u8D1D\u8FD8\u662F\u6DF1\u62F7\u8D1D\uFF0C\u90FD\u53EF\u4EE5\u901A\u8FC7\u8C03\u7528 Object \u7C7B\u7684 <code>clone()</code> \u65B9\u6CD5\u6765\u5B8C\u6210\u3002\u201D\u6211\u4E00\u8FB9\u8BF4\uFF0C\u4E00\u8FB9\u6253\u5F00 Intellij IDEA\uFF0C\u5E76\u627E\u5230\u4E86 <code>clone()</code> \u65B9\u6CD5\u7684\u6E90\u7801\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token annotation punctuation">@HotSpotIntrinsicCandidate</span>
 <span class="token keyword">protected</span> <span class="token keyword">native</span> <span class="token class-name">Object</span> <span class="token function">clone</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token keyword">throws</span> <span class="token class-name">CloneNotSupportedException</span><span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><p>\u5176\u4E2D <code>@HotSpotIntrinsicCandidate</code> \u662F Java 9 \u5F15\u5165\u7684\u4E00\u4E2A\u6CE8\u89E3\uFF0C\u88AB\u5B83\u6807\u6CE8\u7684\u65B9\u6CD5\uFF0C\u5728 HotSpot \u865A\u62DF\u673A\u4E2D\u4F1A\u6709\u4E00\u5957\u9AD8\u6548\u7684\u5B9E\u73B0\u3002\u9700\u8981\u6CE8\u610F\u7684\u662F\uFF0C<code>clone()</code> \u65B9\u6CD5\u540C\u65F6\u662F\u4E00\u4E2A\u672C\u5730\uFF08<code>native</code>\uFF09\u65B9\u6CD5\uFF0C\u5B83\u7684\u5177\u4F53\u5B9E\u73B0\u4F1A\u4EA4\u7ED9 HotSpot \u865A\u62DF\u673A\uFF0C\u90A3\u5C31\u610F\u5473\u7740\u865A\u62DF\u673A\u5728\u8FD0\u884C\u8BE5\u65B9\u6CD5\u7684\u65F6\u5019\uFF0C\u4F1A\u5C06\u5176\u66FF\u6362\u4E3A\u66F4\u9AD8\u6548\u7684 C/C++ \u4EE3\u7801\uFF0C\u8FDB\u800C\u8C03\u7528\u64CD\u4F5C\u7CFB\u7EDF\u53BB\u5B8C\u6210\u5BF9\u8C61\u7684\u514B\u9686\u5DE5\u4F5C\u3002</p><p>\u201C\u54E5\uFF0C\u90A3\u4F60\u5C31\u5148\u8BF4\u6D45\u62F7\u8D1D\u5427\uFF01\u201D</p><p>\u201C\u597D\u7684\u5440\u3002\u76F4\u63A5\u4E0A\u5B9E\u6218\u4EE3\u7801\u3002\u201D</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">class</span> <span class="token class-name">Writer</span> <span class="token keyword">implements</span> <span class="token class-name">Cloneable</span><span class="token punctuation">{</span>
     <span class="token keyword">private</span> <span class="token keyword">int</span> age<span class="token punctuation">;</span>
diff --git a/dist/assets/deletedb-binlog-weiguanjishu.html.114e51d7.js b/dist/assets/deletedb-binlog-weiguanjishu.html.0dd5fe85.js
similarity index 99%
rename from dist/assets/deletedb-binlog-weiguanjishu.html.114e51d7.js
rename to dist/assets/deletedb-binlog-weiguanjishu.html.0dd5fe85.js
index 58f8ee9b..d73c9568 100644
--- a/dist/assets/deletedb-binlog-weiguanjishu.html.114e51d7.js
+++ b/dist/assets/deletedb-binlog-weiguanjishu.html.0dd5fe85.js
@@ -1,4 +1,4 @@
-import{_ as e}from"./plugin-vue_export-helper.21dcd24c.js";import{o as i,c as t,e as l}from"./app.a0271b9c.js";const n={},a=l(`<p>\u5927\u5BB6\u597D\uFF0C\u6211\u662F\u4E8C\u54E5\u5440~\u6211\u4EEC\u90FD\u77E5\u9053\uFF0C\u6570\u636E\u975E\u5E38\u91CD\u8981\u3002</p><p>\u7F51\u4E0A\u4E5F\u7ECF\u5E38\u770B\u5230\u4E00\u4E9B\u6BB5\u5B50\uFF0C\u67D0\u516C\u53F8\u7A0B\u5E8F\u5458\u5BF9\u5DE5\u4F5C\u4E0D\u6EE1\uFF0C\u5220\u5E93\u8DD1\u8DEF\uFF0C\u8001\u677F\u635F\u5931\u60E8\u91CD\uFF0C\u6B32\u54ED\u65E0\u6CEA\u3002\u8FD9\u4E0D\u524D\u51E0\u5929\u53C8\u7206\u51FA\u4E00\u4F8B\uFF0C<strong>\u67D0\u7A0B\u5E8F\u5458\u79BB\u804C\u5F53\u5929\u5220\u5E93\u8DD1\u8DEF</strong>\uFF01</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mysql/deletedb-binlog-weiguanjishu-1.png" alt=""></p><p>\u90A3\u4E48\u6709\u6CA1\u6709\u4EC0\u4E48\u89E3\u51B3\u65B9\u6848\uFF1F\u5373\u4F7F\u6570\u636E\u5E93\u771F\u7684\u88AB\u5220\u4E86\uFF0C\u4E5F\u6709\u5907\u4EFD\u6570\u636E\uFF0C\u80FD\u5FEB\u901F\u6062\u590D\u3002\u751A\u81F3\u53EF\u4EE5\u505A\u5230\u5B9E\u65F6\u70ED\u5907\uFF0C\u5373\u4F7F\u5185\u90E8\u70B8\u6389\u5916\u90E8\u7528\u6237\u4E5F\u611F\u77E5\u4E0D\u5230\uFF0C\u4E00\u7247\u98CE\u5E73\u6D6A\u9759\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mysql/deletedb-binlog-weiguanjishu-2.png" alt=""></p><p>MySQL \u4F5C\u4E3A\u5F53\u4E0B\u6D41\u884C\u6570\u636E\u5E93\uFF0C\u5728\u6570\u636E\u5907\u4EFD\u3001\u9AD8\u53EF\u7528\u65B9\u9762\u975E\u5E38\u6709\u7ADE\u4E89\u529B\uFF0C\u4ECA\u5929\uFF0C\u6211\u4EEC\u5C31\u91CD\u70B9\u804A\u4E00\u804A\u6570\u636E\u5907\u4EFD\u7684\u6740\u624B\u950F binlog\u3002</p><h3 id="\u4E00\u3001mysql-\u4E3B\u5907\u662F\u4EC0\u4E48" tabindex="-1"><a class="header-anchor" href="#\u4E00\u3001mysql-\u4E3B\u5907\u662F\u4EC0\u4E48" aria-hidden="true">#</a> \u4E00\u3001MySQL \u4E3B\u5907\u662F\u4EC0\u4E48\uFF1F</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mysql/deletedb-binlog-weiguanjishu-3.png" alt=""></p><p>\u60C5\u51B5\u4E00\uFF1A</p><ul><li>\u5BA2\u6237\u7AEF\u7684\u4E1A\u52A1\u64CD\u4F5C\uFF0C\u8BFB\u3001\u5199\u8BBF\u95EE\u7684\u662F\u4E3B\u5E93</li><li>\u4E3B\u5E93\u901A\u8FC7\u67D0\u79CD\u673A\u5236\uFF0C\u5C06\u6570\u636E\u5B9E\u65F6\u540C\u6B65\u7ED9\u5907\u5E93</li><li>\u4E3B\u5E93\u7531\u4E8E\u6709\u4E9B\u539F\u56E0\uFF0C\u65E0\u6CD5\u6B63\u5E38\u54CD\u5E94\u5BA2\u6237\u7AEF\u7684\u8BF7\u6C42</li></ul><p>\u60C5\u51B5\u4E8C\uFF1A</p><ul><li>\u5B8C\u6210\u4E3B\u5907\u5207\u6362</li><li>\u5BA2\u6237\u7AEF\u8BFB\u5199\uFF0C\u8BBF\u95EE\u7684\u662F\u5907\u5E93\uFF08\u6B64\u65F6\u5907\u5E93\u5347\u7EA7\u4E3A\u65B0\u4E3B\u5E93\uFF09</li></ul><p>\u90A3\u4E48\uFF0C\u8FD9\u91CC\u9762\u6700\u6838\u5FC3\u7684\u6570\u636E\u540C\u6B65\u662F\u5982\u4F55\u5B9E\u73B0\u7684\u5462\uFF1F</p><h3 id="\u4E8C\u3001\u4E3B\u4ECE\u540C\u6B65" tabindex="-1"><a class="header-anchor" href="#\u4E8C\u3001\u4E3B\u4ECE\u540C\u6B65" aria-hidden="true">#</a> \u4E8C\u3001\u4E3B\u4ECE\u540C\u6B65</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mysql/deletedb-binlog-weiguanjishu-4.png" alt=""></p><p>1\u3001\u5728\u5907\u5E93\u6267\u884C <code>change master</code> \u547D\u4EE4 \uFF0C\u7ED1\u5B9A\u4E3B\u5E93\u7684\u4FE1\u606F</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>mysql&gt; CHANGE MASTER TO MASTER_HOST = &#39;192.168.1.1&#39;, MASTER_USER = &#39;repl&#39;, MASTER_PASSWORD = &#39;replpassword&#39;, MASTER_PORT = 3306, MASTER_AUTO_POSITION = 1, MASTER_RETRY_COUNT = 0, MASTER_HEARTBEAT_PERIOD = 10000; 
+import{_ as e}from"./plugin-vue_export-helper.21dcd24c.js";import{o as i,c as t,e as l}from"./app.615e41d8.js";const n={},a=l(`<p>\u5927\u5BB6\u597D\uFF0C\u6211\u662F\u4E8C\u54E5\u5440~\u6211\u4EEC\u90FD\u77E5\u9053\uFF0C\u6570\u636E\u975E\u5E38\u91CD\u8981\u3002</p><p>\u7F51\u4E0A\u4E5F\u7ECF\u5E38\u770B\u5230\u4E00\u4E9B\u6BB5\u5B50\uFF0C\u67D0\u516C\u53F8\u7A0B\u5E8F\u5458\u5BF9\u5DE5\u4F5C\u4E0D\u6EE1\uFF0C\u5220\u5E93\u8DD1\u8DEF\uFF0C\u8001\u677F\u635F\u5931\u60E8\u91CD\uFF0C\u6B32\u54ED\u65E0\u6CEA\u3002\u8FD9\u4E0D\u524D\u51E0\u5929\u53C8\u7206\u51FA\u4E00\u4F8B\uFF0C<strong>\u67D0\u7A0B\u5E8F\u5458\u79BB\u804C\u5F53\u5929\u5220\u5E93\u8DD1\u8DEF</strong>\uFF01</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mysql/deletedb-binlog-weiguanjishu-1.png" alt=""></p><p>\u90A3\u4E48\u6709\u6CA1\u6709\u4EC0\u4E48\u89E3\u51B3\u65B9\u6848\uFF1F\u5373\u4F7F\u6570\u636E\u5E93\u771F\u7684\u88AB\u5220\u4E86\uFF0C\u4E5F\u6709\u5907\u4EFD\u6570\u636E\uFF0C\u80FD\u5FEB\u901F\u6062\u590D\u3002\u751A\u81F3\u53EF\u4EE5\u505A\u5230\u5B9E\u65F6\u70ED\u5907\uFF0C\u5373\u4F7F\u5185\u90E8\u70B8\u6389\u5916\u90E8\u7528\u6237\u4E5F\u611F\u77E5\u4E0D\u5230\uFF0C\u4E00\u7247\u98CE\u5E73\u6D6A\u9759\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mysql/deletedb-binlog-weiguanjishu-2.png" alt=""></p><p>MySQL \u4F5C\u4E3A\u5F53\u4E0B\u6D41\u884C\u6570\u636E\u5E93\uFF0C\u5728\u6570\u636E\u5907\u4EFD\u3001\u9AD8\u53EF\u7528\u65B9\u9762\u975E\u5E38\u6709\u7ADE\u4E89\u529B\uFF0C\u4ECA\u5929\uFF0C\u6211\u4EEC\u5C31\u91CD\u70B9\u804A\u4E00\u804A\u6570\u636E\u5907\u4EFD\u7684\u6740\u624B\u950F binlog\u3002</p><h3 id="\u4E00\u3001mysql-\u4E3B\u5907\u662F\u4EC0\u4E48" tabindex="-1"><a class="header-anchor" href="#\u4E00\u3001mysql-\u4E3B\u5907\u662F\u4EC0\u4E48" aria-hidden="true">#</a> \u4E00\u3001MySQL \u4E3B\u5907\u662F\u4EC0\u4E48\uFF1F</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mysql/deletedb-binlog-weiguanjishu-3.png" alt=""></p><p>\u60C5\u51B5\u4E00\uFF1A</p><ul><li>\u5BA2\u6237\u7AEF\u7684\u4E1A\u52A1\u64CD\u4F5C\uFF0C\u8BFB\u3001\u5199\u8BBF\u95EE\u7684\u662F\u4E3B\u5E93</li><li>\u4E3B\u5E93\u901A\u8FC7\u67D0\u79CD\u673A\u5236\uFF0C\u5C06\u6570\u636E\u5B9E\u65F6\u540C\u6B65\u7ED9\u5907\u5E93</li><li>\u4E3B\u5E93\u7531\u4E8E\u6709\u4E9B\u539F\u56E0\uFF0C\u65E0\u6CD5\u6B63\u5E38\u54CD\u5E94\u5BA2\u6237\u7AEF\u7684\u8BF7\u6C42</li></ul><p>\u60C5\u51B5\u4E8C\uFF1A</p><ul><li>\u5B8C\u6210\u4E3B\u5907\u5207\u6362</li><li>\u5BA2\u6237\u7AEF\u8BFB\u5199\uFF0C\u8BBF\u95EE\u7684\u662F\u5907\u5E93\uFF08\u6B64\u65F6\u5907\u5E93\u5347\u7EA7\u4E3A\u65B0\u4E3B\u5E93\uFF09</li></ul><p>\u90A3\u4E48\uFF0C\u8FD9\u91CC\u9762\u6700\u6838\u5FC3\u7684\u6570\u636E\u540C\u6B65\u662F\u5982\u4F55\u5B9E\u73B0\u7684\u5462\uFF1F</p><h3 id="\u4E8C\u3001\u4E3B\u4ECE\u540C\u6B65" tabindex="-1"><a class="header-anchor" href="#\u4E8C\u3001\u4E3B\u4ECE\u540C\u6B65" aria-hidden="true">#</a> \u4E8C\u3001\u4E3B\u4ECE\u540C\u6B65</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mysql/deletedb-binlog-weiguanjishu-4.png" alt=""></p><p>1\u3001\u5728\u5907\u5E93\u6267\u884C <code>change master</code> \u547D\u4EE4 \uFF0C\u7ED1\u5B9A\u4E3B\u5E93\u7684\u4FE1\u606F</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>mysql&gt; CHANGE MASTER TO MASTER_HOST = &#39;192.168.1.1&#39;, MASTER_USER = &#39;repl&#39;, MASTER_PASSWORD = &#39;replpassword&#39;, MASTER_PORT = 3306, MASTER_AUTO_POSITION = 1, MASTER_RETRY_COUNT = 0, MASTER_HEARTBEAT_PERIOD = 10000; 
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>\u7B80\u5355\u89E3\u91CA\u4E0B\uFF1A</p><ul><li>MASTER_HOST \uFF1Amaster\u4E3B\u673A\u540D\uFF08\u6216IP\u5730\u5740\uFF09</li><li>MASTER_PORT \uFF1Amysql\u5B9E\u4F8B\u7AEF\u53E3\u53F7</li><li>MASTER_USER\uFF1A\u7528\u6237\u540D</li><li>MASTER_PASSWORD\uFF1A\u5BC6\u7801</li><li>MASTER_AUTO_POSITION\uFF1A\u5982\u679C\u8FDB\u884Cchange master to\u65F6\u4F7F\u7528MASTER_AUTO_POSITION = 1\uFF0Cslave\u8FDE\u63A5master\u5C06\u4F7F\u7528\u57FA\u4E8EGTID\u7684\u590D\u5236\u534F\u8BAE</li><li>MASTER_RETRY_COUNT\uFF1A\u91CD\u8FDE\u6B21\u6570</li><li>MASTER_HEARTBEAT_PERIOD\uFF1A\u590D\u5236\u5FC3\u8DF3\u7684\u5468\u671F</li></ul><p>2\u3001\u5907\u5E93\u6267\u884C start slave \u547D\u4EE4\uFF0C\u5907\u5E93\u542F\u52A8\u4E24\u4E2A\u7EBF\u7A0B\uFF1AI/O thread \u548C SQL thread</p><p>3\u3001master\u4E3B\u5E93\uFF0C\u6709\u6570\u636E\u66F4\u65B0\uFF0C\u5C06\u6B64\u6B21\u66F4\u65B0\u7684\u4E8B\u4EF6\u7C7B\u578B\u5199\u5165\u5230\u4E3B\u5E93\u7684 binlog \u6587\u4EF6\u4E2D</p><p>4\u3001\u4E3B\u5E93\u4F1A\u521B\u5EFAlog dump \u7EBF\u7A0B\uFF0C\u901A\u77E5slave\u6709\u6570\u636E\u66F4\u65B0</p><p>5\u3001slave\uFF0C\u5411master\u8282\u70B9\u7684 log dump\u7EBF\u7A0B\u8BF7\u6C42\u4E00\u4EFD\u6307\u5B9Abinlog\u6587\u4EF6\u4F4D\u7F6E\u7684\u526F\u672C\uFF0C\u5E76\u5C06\u8BF7\u6C42\u56DE\u6765\u7684binlog\u5B58\u5230\u672C\u5730\u7684Relay log \u4E2D\u7EE7\u65E5\u5FD7\u4E2D</p><p>6\u3001slave \u518D\u5F00\u542F\u4E00\u4E2ASQL \u7EBF\u7A0B\u8BFB\u53D6Relay log\u65E5\u5FD7\uFF0C\u89E3\u6790\u51FA\u65E5\u5FD7\u91CC\u7684\u547D\u4EE4\uFF0C\u5E76\u6267\u884C\uFF0C\u4ECE\u800C\u4FDD\u8BC1\u4E3B\u5907\u5E93\u6570\u636E\u540C\u6B65</p><h3 id="\u4E09\u3001\u5F00\u542F-binlog" tabindex="-1"><a class="header-anchor" href="#\u4E09\u3001\u5F00\u542F-binlog" aria-hidden="true">#</a> \u4E09\u3001\u5F00\u542F binlog</h3><p>\u4ECE\u4EE5\u4E0A\u6B65\u9AA4\u53EF\u4EE5\u770B\u5F97\u51FA\uFF0Cbinlog \u8D77\u5230\u4E86\u975E\u5E38\u5173\u952E\u7684\u4F5C\u7528\uFF0C\u90A3\u5C31\u8BA9\u6211\u4EEC\u8FD1\u8DDD\u79BB\u770B\u4E0B binlog \u65E5\u5FD7\u3002</p><p>binlog \u683C\u5F0F\u6709\u4E09\u79CD\uFF1A</p><ul><li>row</li><li>statement</li><li>mixed</li></ul><p>\u63A5\u4E0B\u6765\uFF0C\u6211\u4EEC\u6765\u505A\u4E00\u4E2A\u5B9E\u9A8C\uFF1A</p><p>\u5148\u521B\u5EFA\u4E00\u4E2A\u8868\uFF1A</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>CREATE TABLE \`person\` (
   \`id\` bigint(20) unsigned NOT NULL AUTO_INCREMENT COMMENT &#39;\u81EA\u589E\u4E3B\u952E&#39;,
   \`income\` bigint(20) NOT NULL COMMENT &#39;\u6536\u5165&#39;,
diff --git a/dist/assets/electron-information-engineering.html.16bd5754.js b/dist/assets/electron-information-engineering.html.16bd5754.js
new file mode 100644
index 00000000..2dfb9ed7
--- /dev/null
+++ b/dist/assets/electron-information-engineering.html.16bd5754.js
@@ -0,0 +1 @@
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diff --git a/dist/assets/electron-information-engineering.html.365eb9fa.js b/dist/assets/electron-information-engineering.html.6411b062.js
similarity index 99%
rename from dist/assets/electron-information-engineering.html.365eb9fa.js
rename to dist/assets/electron-information-engineering.html.6411b062.js
index 3ab72500..21392e62 100644
--- a/dist/assets/electron-information-engineering.html.365eb9fa.js
+++ b/dist/assets/electron-information-engineering.html.6411b062.js
@@ -1 +1 @@
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src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexijianyi/electron-information-engineering-4e3f8c93-9df5-48dd-9824-79005d5c5518.png" alt=""></p><p>\u6211\u4E4B\u6240\u4EE5\u80FD\u591F\u9006\u88AD\u6210\u529F\uFF0C\u56E0\u7D20\u6709\u5F88\u591A\uFF0C\u4F46\u6211\u60F3\u4EE5\u4E0B\u8FD9\u4E09\u70B9\u975E\u5E38\u91CD\u8981\uFF1A</p><ul><li>\u7236\u6BCD\u7684\u652F\u6301</li><li>\u81EA\u5DF1\u7684\u52AA\u529B</li><li><strong>\u9009\u62E9\u4E86\u8BA1\u7B97\u673A\u4E13\u4E1A</strong></li></ul>',27),d=e("strong",null,"\u8FD9\u91CC\u4E5F\u5206\u4EAB\u4E00\u5957\u975E\u5E38\u5B8C\u6574\u7684\u8BA1\u7B97\u673A\u5FC5\u8BFB\u7684\u7ECF\u5178\u4E66\u7C4D\uFF0C\u5BF9\u8BA1\u7B97\u673A\u4E13\u4E1A\u7684\u540C\u5B66\u4F1A\u6709\u975E\u5E38\u5927\u7684\u5E2E\u52A9\uFF0C\u8FD9\u4E5F\u662F\u6211\u5341\u591A\u5E74\u7F16\u7A0B\u751F\u6DAF\u91CC\u7559\u4E0B\u7684\u5B9D\u85CF",-1),h=t("\uFF1A"),_={href:"https://tobebetterjavaer.com/download/java.html",target:"_blank",rel:"noopener 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noreferrer"},y=t("https://tobebetterjavaer.com/xuexiluxian/java/yitiaolong.html"),B=r('<h3 id="\u4E8C\u3001\u5F00\u53D1\u6846\u67B6" tabindex="-1"><a class="header-anchor" href="#\u4E8C\u3001\u5F00\u53D1\u6846\u67B6" aria-hidden="true">#</a> \u4E8C\u3001\u5F00\u53D1\u6846\u67B6</h3><p>\u53EF\u80FD\u5F88\u591A\u4EBA\u4F1A\u5BF9\u5F00\u53D1\u6846\u67B6\u55E4\u4E4B\u4EE5\u9F3B\uFF0C\u611F\u89C9\u5B66\u8FD9\u4E2A\u6CA1\u591A\u5927\u7528\u5904\uFF0C\u63D0\u5347\u4E0D\u4E86\u4F60\u7684\u6280\u672F\u529F\u5E95\u3002\u4F46\u662F\u5462\uFF0C\u5982\u679C\u4F60\u60F3\u505A\u7EC3\u624B\u9879\u76EE\uFF0C\u6CA1\u6709\u5F00\u53D1\u6846\u67B6\u7684\u5E2E\u52A9\uFF0C\u5F88\u96BE\u3002</p><p>Java \u4E4B\u6240\u4EE5\u6D41\u884C\uFF0C\u5F88\u91CD\u8981\u7684\u4E00\u90E8\u5206\u539F\u56E0\u5C31\u662F\u62E5\u6709 Spring \u7CFB\u5217\u6846\u67B6\u8FD9\u4E2A\u5927\u6740\u5668\uFF0C\u5305\u62EC SSM\uFF08Spring+SpringMVC+MyBatis\uFF09\u3001Spring Boot\u3001Spring Cloud\u3002</p><p>\u6211\u4EEC\u53EA\u662F\u4E0D\u5E94\u8BE5\u505C\u7559\u5728\u53EA\u4F1A\u7528\u7684\u5C42\u9762\u4E0A\uFF0C\u8981\u61C2\u80CC\u540E\u7684\u539F\u7406\u3002\u8BF4\u4E00\u5343\u9053\u4E00\u4E07\uFF0CSpring \u7684\u6838\u5FC3\u5C31\u4E24\u4E2A\u6982\u5FF5\uFF1AAOP\u3001IoC\u3002</p><p>AOP\uFF08Aspect-Oriented Programming\uFF09\uFF0C\u4E5F\u5C31\u662F\u9762\u5411\u5207\u9762\u7F16\u7A0B\uFF0C\u80FD\u591F\u5C06\u90A3\u4E9B\u4E0E\u4E1A\u52A1\u65E0\u5173\uFF0C\u5374\u4E3A\u4E1A\u52A1\u6A21\u5757\u6240\u5171\u540C\u8C03\u7528\u7684\u903B\u8F91\u6216\u8D23\u4EFB\uFF08\u4F8B\u5982\u4E8B\u52A1\u5904\u7406\u3001\u65E5\u5FD7\u7BA1\u7406\u3001\u6743\u9650\u63A7\u5236\u7B49\uFF09\u5C01\u88C5\u8D77\u6765\uFF0C\u4FBF\u4E8E\u51CF\u5C11\u7CFB\u7EDF\u7684\u91CD\u590D\u4EE3\u7801\uFF0C\u964D\u4F4E\u6A21\u5757\u95F4\u7684\u8026\u5408\u5EA6\uFF0C\u5E76\u6709\u5229\u4E8E\u672A\u6765\u7684\u53EF\u62D3\u5C55\u6027\u548C\u53EF\u7EF4\u62A4\u6027\u3002</p><p>IoC\uFF08Inverse of Control\uFF09\uFF0C\u4E5F\u5C31\u662F\u63A7\u5236\u53CD\u8F6C\uFF0C\u662F\u4E00\u79CD\u8BBE\u8BA1\u601D\u60F3\uFF0C\u5C31\u662F\u5C06\u539F\u672C\u5728\u7A0B\u5E8F\u4E2D\u624B\u52A8\u521B\u5EFA\u5BF9\u8C61\u7684\u63A7\u5236\u6743\uFF0C\u4EA4\u7531 Spring \u6846\u67B6\u6765\u7BA1\u7406\u3002</p><p>\u5148\u5B66\u4E60 SSM\uFF0C\u518D\u5B66\u4E60 Spring Boot\u3002Spring Boot \u7684\u51FA\u73B0\uFF0C\u5E76\u4E0D\u610F\u5473\u7740 Spring \u548C SpringMVC \u5DF2\u7ECF\u8FC7\u65F6\u4E86\uFF0C\u4ECE\u8BBE\u8BA1\u76EE\u7684\u4E0A\u6765\u8BF4\uFF0CSpring Boot \u53EA\u662F\u5B9E\u73B0\u4E86 Spring \u7684\u81EA\u52A8\u88C5\u914D\uFF0C\u964D\u4F4E\u4E86\u9879\u76EE\u642D\u5EFA\u7684\u96BE\u5EA6\u3002</p><p>\u4ECE\u6280\u672F\u89D2\u5EA6\u6765\u8BF4\uFF0CSpring Boot \u7684\u5E95\u5C42\u4F9D\u7136\u662F Spring \u7684\u6838\u5FC3\u673A\u5236\uFF0C\u4E5F\u5C31\u662F AOP \u548C IoC\uFF0CSpring Boot \u53EA\u662F\u4E00\u4E2A\u627F\u8F7D\u8005\u3002\u5728\u6211\u770B\u6765\uFF0C\u5B66\u4E60 Spring \u7684\u6B63\u786E\u8DEF\u5F84\u5E94\u8BE5\u662F Spring -&gt; Servlet -&gt; Spring MVC -&gt; Spring Boot\u3002</p><h3 id="\u4E09\u3001\u6570\u636E\u5E93" tabindex="-1"><a class="header-anchor" href="#\u4E09\u3001\u6570\u636E\u5E93" aria-hidden="true">#</a> \u4E09\u3001\u6570\u636E\u5E93</h3><p>\u589E\u5220\u6539\u67E5\uFF0C\u589E\u5220\u6539\u67E5\uFF0C\u8981\u60F3\u505A\u4E00\u540D\u53EA\u4F1A CRUD \u7684\u7A0B\u5E8F\u5458\uFF0C\u6570\u636E\u5E93\u8FD9\u5757\u662F\u9003\u4E0D\u6389\u7684\u3002\u4E0D\u8FC7\uFF0C\u8FD9\u91CC\u5C31\u4E0D\u91CD\u70B9\u8BF4\u4E86\uFF0C\u63A8\u8350\u4E00\u4E9B\u8D44\u6E90\u7ED9\u5927\u5BB6\u3002</p><p>\u5C0F\u7834\u7AD9\u4E0A\u7684\u4E09\u4E2A\u89C6\u9891\u3002</p>',11),M=t("SQL\uFF1A"),J={href:"https://www.bilibili.com/video/BV1UE41147KC",target:"_blank",rel:"noopener noreferrer"},P=t("https://www.bilibili.com/video/BV1UE41147KC"),A=t("MySQL\uFF1A"),L={href:"https://www.bilibili.com/video/BV12b411K7Zu",target:"_blank",rel:"noopener noreferrer"},V=t("https://www.bilibili.com/video/BV12b411K7Zu"),T=t("Redis\uFF1A"),R={href:"https://www.bilibili.com/video/BV1S54y1R7SB",target:"_blank",rel:"noopener noreferrer"},U=t("https://www.bilibili.com/video/BV1S54y1R7SB"),E=r('<p>\u56DB\u672C\u4E66\u3002</p><ul><li>\u300ASQL \u5FC5\u77E5\u5FC5\u4F1A\u300B</li><li>\u300A\u9AD8\u6027\u80FD MySQL\u300B</li><li>\u300AMySQL \u6280\u672F\u5185\u5E55-InnoDB \u5B58\u50A8\u5F15\u64CE\u300B</li><li>\u300ARedis \u6DF1\u5165\u5386\u9669\u6838\u5FC3\u539F\u7406\u4E0E\u5E94\u7528\u5B9E\u6218\u300B</li></ul><h3 id="\u56DB\u3001\u8BA1\u7B97\u673A\u7EC4\u6210\u539F\u7406" tabindex="-1"><a class="header-anchor" href="#\u56DB\u3001\u8BA1\u7B97\u673A\u7EC4\u6210\u539F\u7406" aria-hidden="true">#</a> \u56DB\u3001\u8BA1\u7B97\u673A\u7EC4\u6210\u539F\u7406</h3><p>\u8BA1\u7B97\u673A\u662F\u7531 CPU\u3001\u5185\u5B58\u3001\u8F93\u5165\u8F93\u51FA\u8BBE\u5907\uFF0C\u8FD9\u4E9B\u786C\u4EF6\u7EC4\u6210\u7684\uFF0C\u4F46\u6211\u4EEC\u7A0B\u5E8F\u5458\uFF0C\u5F80\u5F80\u4ECE\u4E8B\u7684\u662F\u8F6F\u4EF6\u5F00\u53D1\u7684\u5DE5\u4F5C\uFF0C\u600E\u4E48\u5728\u786C\u4EF6\u548C\u8F6F\u4EF6\u4E4B\u95F4\u642D\u8D77\u4E00\u5EA7\u6865\u6881\u5462\uFF1F</p><p>\u7B54\u6848\u5C31\u662F\u5B66\u4E60\u8BA1\u7B97\u673A\u7EC4\u6210\u539F\u7406\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexijianyi/electron-information-engineering-5270d8c0-5e03-4a06-924c-c9a8d25dd446.jpg" alt=""></p><p>\u8BA1\u7B97\u673A\u7EC4\u6210\u539F\u7406\u7684\u77E5\u8BC6\u70B9\u53EF\u4EE5\u62C6\u5206\u4E3A\u56DB\u4E2A\u90E8\u5206\uFF1A</p><ul><li>\u8BA1\u7B97\u673A\u7684\u57FA\u672C\u7EC4\u6210\u786C\u4EF6</li><li>\u8BA1\u7B97\u673A\u7684\u6307\u4EE4\u548C\u8BA1\u7B97</li><li>\u5904\u7406\u5668\u6D89\u53CA</li><li>\u5B58\u50A8\u5668\u548C IO \u8BBE\u5907</li></ul><p>\u6309\u7167\u51AF\u8BFA\u4F9D\u66FC\u7684\u4F53\u7CFB\u7ED3\u6784\uFF0C\u8BA1\u7B97\u673A\u5206\u4E3A\u8FD0\u7B97\u5668\u3001\u63A7\u5236\u5668\u3001\u5B58\u50A8\u5668\u3001\u8F93\u5165\u8F93\u51FA\u8BBE\u5907\uFF1B\u6211\u4EEC\u7F16\u5199\u7684\u4EE3\u7801\uFF0C\u8981\u60F3\u5728\u8BA1\u7B97\u673A\u4E0A\u8FD0\u884C\uFF0C\u5C31\u9700\u8981\u901A\u8FC7\u7F16\u8BD1\u5668\u8F6C\u6210\u6C47\u7F16\u4EE3\u7801\uFF0C\u518D\u7ECF\u8FC7\u6C47\u7F16\u5668\u8F6C\u6210\u4E00\u6761\u6761\u6307\u4EE4\uFF0C\u8FD9\u4E9B\u6307\u4EE4\u7684\u6267\u884C\uFF0C\u662F\u7531\u63A7\u5236\u5668\u6765\u5B8C\u6210\u7684\u3002</p><p><strong>\u8BA1\u7B97\u673A\u7EC4\u6210\u539F\u7406\u8BE5\u600E\u4E48\u5B66\u5462</strong>\uFF1F</p><p>\u5982\u679C\u82F1\u8BED\u529F\u5E95\u975E\u5E38\u4E0D\u9519\u7684\u8BDD\uFF0C\u5B89\u5229\u4E00\u95E8 Coursera \u4E0A\u7684\u8BFE\u7A0B\uFF0C\u4ECE\u4E0E\u975E\u95E8\u5230\u4FC4\u7F57\u65AF\u65B9\u5757\uFF0C\u7B80\u5355\u6765\u8BF4\uFF0C\u8FD9\u95E8\u8BFE\u4F1A\u6559\u4F60\u600E\u4E48\u4ECE\u4E0E\u975E\u95E8\u5F00\u59CB\u9020\u4E00\u53F0\u8BA1\u7B97\u673A\u3002</p>',11),O=t("\u5730\u5740\uFF1A"),Q={href:"https://www.coursera.org/learn/build-a-computer%E2%80%8Bwww.coursera.org/learn/build-a-computer",target:"_blank",rel:"noopener noreferrer"},D=t("https://www.coursera.org/learn/build-a-computer\u200Bwww.coursera.org/learn/build-a-computer"),N=e("p",null,"\u8FD9\u95E8\u8BFE\u7684\u89C6\u9891\u62CD\u7684\u90A3\u53EB\u4E00\u4E2A\u4F18\u8D28\uFF0C\u867D\u7136\u6CA1\u6709\u4E2D\u6587\u7FFB\u8BD1\uFF0C\u4F46\u89C6\u9891\u4E0B\u65B9\u7684\u5B57\u5E55\u4F1A\u6709\u8282\u594F\u7684\u79FB\u52A8\u3002",-1),F=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexijianyi/electron-information-engineering-a5f13f0d-c0e1-486a-933a-7bfa81983a6c.jpg",alt:""})],-1),q=t("\u56FD\u5185\u7684\u63A8\u8350\u54C8\u5DE5\u5927\u7684\u8FD9\u95E8\u89C6\u9891\u8BFE\uFF0C\u6574\u4F53\u8BC4\u4EF7\u975E\u5E38\u9AD8\uFF08\u5EFA\u8BAE 1.5 \u500D\u901F\u98DF\u7528\uFF09\uFF0C\u6233\uFF1A"),K={href:"https://www.bilibili.com/video/BV1WW411Q7PF",target:"_blank",rel:"noopener noreferrer"},W=t("\u8BA1\u7B97\u673A\u7EC4\u6210\u539F\u7406\uFF08\u5510\u6714\u98DE\uFF09_\u54D4\u54E9\u54D4\u54E9_bilibili"),z=r('<h3 id="\u4E94\u3001\u6570\u636E\u7ED3\u6784\u4E0E\u7B97\u6CD5" tabindex="-1"><a class="header-anchor" href="#\u4E94\u3001\u6570\u636E\u7ED3\u6784\u4E0E\u7B97\u6CD5" aria-hidden="true">#</a> \u4E94\u3001\u6570\u636E\u7ED3\u6784\u4E0E\u7B97\u6CD5</h3><p>\u53EF\u80FD\u6709\u4EBA\u4F1A\u89C9\u5F97\uFF1A\u5C31\u7B97\u4E0D\u61C2\u6570\u636E\u7ED3\u6784\u4E0E\u7B97\u6CD5\uFF0C\u7167\u6837\u53EF\u4EE5\u628A Java API\u3001\u5F00\u53D1\u6846\u67B6\u7528\u5F97\u98DE\u8D77\uFF1F</p><p>\u4F46\u8FD9\u91CC\u6211\u60F3\u8868\u8FBE\u7684\u662F\uFF1A</p><p><strong>1\uFF09\u6570\u636E\u7ED3\u6784\u4E0E\u7B97\u6CD5\u662F\u5F88\u591A\u5927\u5382\u7B5B\u9009\u4EBA\u624D\u7684\u8981\u7D20\u4E4B\u4E00</strong>\u3002</p><p>\u8FD9\u662F\u56E0\u4E3A\u6821\u62DB\u7684\u65F6\u5019\uFF0C\u53C2\u52A0\u9762\u8BD5\u7684\u5B66\u751F\u5927\u591A\u6570\u90FD\u662F\u6CA1\u6709\u5B9E\u9645\u9879\u76EE\u7ECF\u9A8C\u7684\uFF0C\u516C\u53F8\u53EA\u80FD\u901A\u8FC7\u8003\u5BDF\u8FD9\u4E9B\u57FA\u7840\u77E5\u8BC6\u6765\u7B5B\u9009\u3002</p><p>\u5927\u5382\u4E0D\u6015\u4F60\u6CA1\u6709\u9879\u76EE\u7ECF\u9A8C\uFF0C\u800C\u6015\u4F60\u6CA1\u6709\u957F\u671F\u53D1\u5C55\u7684\u6F5C\u529B\u3002\u6240\u4EE5\uFF0C\u5F88\u591A\u53C2\u52A0\u6821\u62DB\u7684\u540C\u5B66\uFF0C\u5728\u9762\u8BD5\u524D\u90FD\u4F1A\u75AF\u72C2\u5237\u9898\u7684\uFF0C\u81F3\u5C11\u4F1A\u7A81\u51FB\u4E2A 100 \u9053\u5DE6\u53F3\u7684\u9898\u76EE\u3002</p><p><strong>2\uFF09\u5B9E\u9645\u5DE5\u4F5C\u5F53\u4E2D\u80AF\u5B9A\u662F\u4F1A\u7528\u5230\u7684\u3002</strong></p><p>\u4E3E\u4E2A\u4F8B\u5B50\uFF0C\u5B58\u50A8\u67D0\u4E2A\u4E1A\u52A1\u6570\u636E\u65F6\uFF0C\u4F60\u6253\u7B97\u7528 ArrayList \u8FD8\u662F LinkedList\uFF0C\u5B83\u4EEC\u5E95\u5C42\u7528\u7684\u662F\u54EA\u79CD\u6570\u636E\u7ED3\u6784\uFF0C\u589E\u5220\u6539\u67E5\u4E0A\u6709\u54EA\u4E9B\u4F18\u7F3A\u70B9\uFF1F</p><p>\u518D\u6BD4\u5982\uFF0CRedis \u4E2D\u7684\u6709\u5E8F\u96C6\u5408\u662F\u7528\u4EC0\u4E48\u6570\u636E\u7ED3\u6784\u5B9E\u73B0\u7684\uFF1F\u4E3A\u4EC0\u4E48\u8981\u7528\u8DF3\u8868\u4E8C\u4E0D\u662F\u4E8C\u53C9\u6811\u5462\uFF1F</p><p>\u4E0D\u61C2\u6570\u636E\u7ED3\u6784\u548C\u7B97\u6CD5\uFF0C\u884C\u5F97\u901A\u5417\uFF1F</p><p><strong>3\uFF09\u638C\u63E1\u4E86\u6570\u636E\u7ED3\u6784\u4E0E\u7B97\u6CD5\uFF0C\u5BF9\u9605\u8BFB\u6E90\u7801\u4F1A\u6709\u5F88\u5927\u7684\u5E2E\u52A9\u3002</strong></p><p>\u56E0\u4E3A\u5F88\u591A\u65F6\u5019\uFF0C\u6E90\u7801\u5F53\u4E2D\u90FD\u4F1A\u8003\u91CF\u5230\u4E0D\u540C\u6570\u636E\u7ED3\u6784\u4E4B\u95F4\u7684\u4F18\u70B9\u548C\u7F3A\u70B9\u3002</p><p>\u4F60\u6BD4\u5982\u8BF4\uFF0CHashMap \u4E3A\u4EC0\u4E48\u5728\u94FE\u8868\u957F\u5EA6\u5927\u4E8E 8 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nvdia\u3001AMD\u3001\u4E2D\u5174\u3001\u6D77\u601D\u7B49\u3002</p><p>\u4ECE\u5165\u95E8\u95E8\u69DB\u4E0A\u6765\u770B\uFF0C\u6A21\u62DF\u6BD4\u6570\u5B57\u7684\u95E8\u69DB\u9AD8\u4E00\u4E9B\uFF0C\u6A21\u62DF\u5982\u679C\u60F3\u505A\u7684\u597D\u4E00\u70B9\uFF0C\u7814\u7A76\u751F\u5B66\u5386\u662F\u5FC5\u987B\u7684\uFF0C\u8BFB\u535A\u66F4\u597D\uFF1B\u6570\u5B57\u95E8\u69DB\u4E5F\u4E0D\u80FD\u8BF4\u4F4E\uFF0C\u5982\u679C\u8DB3\u591F\u4F18\u79C0\uFF0C\u672C\u79D1\u4E5F\u662F\u53EF\u4EE5\u987A\u5229\u5C31\u804C\u7684\uFF0C\u7248\u56FE\u5C97\u4F4D\u7684\u8981\u6C42\u66F4\u4F4E\u4E00\u4E9B\uFF0C\u53EA\u6709\u8981\u6570\u7535\u3001\u6A21\u7535\u7684\u57FA\u7840\uFF0C\u5BF9\u5927\u4E13\u751F\u4E5F\u662F\u6BD4\u8F83\u53CB\u597D\u7684\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexijianyi/electron-information-engineering-30e29fba-9b5d-40da-bda1-dbd0e81b8247.png" alt=""></p><p>\u81F3\u4E8E\u85AA\u8D44\u7684\u8BDD\uFF0C\u5982\u679C\u662F\u540D\u6821\u51FA\u8EAB\u7684\u79D1\u73ED\u751F\uFF0C50 \u4E07\u7684\u85AA\u8D44\u53EF\u4EE5\u8BF4\u7FA1\u715E\u65C1\u4EBA\u4E86\u3002</p><h2 id="\u4E8C\u3001\u8BA1\u7B97\u673A\u4E13\u4E1A" tabindex="-1"><a class="header-anchor" href="#\u4E8C\u3001\u8BA1\u7B97\u673A\u4E13\u4E1A" aria-hidden="true">#</a> \u4E8C\u3001\u8BA1\u7B97\u673A\u4E13\u4E1A</h2><p>\u4ECE\u6280\u672F\u5E94\u7528\u7684\u89D2\u5EA6\u6765\u770B\uFF0C\u5728\u76F8\u5F53\u957F\u7684\u65F6\u95F4\u91CC\uFF0C\u793E\u4F1A\u5BF9\u8BA1\u7B97\u673A\u4ECE\u4E1A\u4EBA\u5458\u7684\u7F3A\u53E3\u90FD\u975E\u5E38\u5927\u3002\u56E0\u4E3A\uFF0C\u5404\u884C\u5404\u4E1A\u90FD\u9700\u8981\u8BA1\u7B97\u673A\u4E13\u4E1A\u7684\u4EBA\u5458\u53C2\u4E0E\u8FDB\u6765\uFF0C\u8FDB\u884C\u6570\u5B57\u5316\u7684\u6539\u9020\u3002<strong>\u4E3E\u4E2A\u4F8B\u5B50\uFF0C\u6211\u5728\u67D0 2 \u7EBF\u57CE\u5E02\u7684 5 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src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexijianyi/electron-information-engineering-4e3f8c93-9df5-48dd-9824-79005d5c5518.png" alt=""></p><p>\u6211\u4E4B\u6240\u4EE5\u80FD\u591F\u9006\u88AD\u6210\u529F\uFF0C\u56E0\u7D20\u6709\u5F88\u591A\uFF0C\u4F46\u6211\u60F3\u4EE5\u4E0B\u8FD9\u4E09\u70B9\u975E\u5E38\u91CD\u8981\uFF1A</p><ul><li>\u7236\u6BCD\u7684\u652F\u6301</li><li>\u81EA\u5DF1\u7684\u52AA\u529B</li><li><strong>\u9009\u62E9\u4E86\u8BA1\u7B97\u673A\u4E13\u4E1A</strong></li></ul>',27),d=e("strong",null,"\u8FD9\u91CC\u4E5F\u5206\u4EAB\u4E00\u5957\u975E\u5E38\u5B8C\u6574\u7684\u8BA1\u7B97\u673A\u5FC5\u8BFB\u7684\u7ECF\u5178\u4E66\u7C4D\uFF0C\u5BF9\u8BA1\u7B97\u673A\u4E13\u4E1A\u7684\u540C\u5B66\u4F1A\u6709\u975E\u5E38\u5927\u7684\u5E2E\u52A9\uFF0C\u8FD9\u4E5F\u662F\u6211\u5341\u591A\u5E74\u7F16\u7A0B\u751F\u6DAF\u91CC\u7559\u4E0B\u7684\u5B9D\u85CF",-1),h=t("\uFF1A"),_={href:"https://tobebetterjavaer.com/download/java.html",target:"_blank",rel:"noopener noreferrer"},g=t("\u8BA1\u7B97\u673A\u7ECF\u5178\u4E66\u5355"),b=e("p",null,[e("strong",null,"\u91CC\u9762\u7684\u4E66\u5355\u771F\u7684\u975E\u5E38 nice\uFF0C\u4E0D\u7BA1\u662F\u5B66\u4E60\u7F16\u7A0B\u7684\u65B0\u624B\uFF0C\u8FD8\u662F\u5DE5\u4F5C\u591A\u5E74\u7684\u8001\u624B\uFF0C\u5E94\u8BE5\u90FD\u5F88\u6709\u5E2E\u52A9"),t("\uFF1A")],-1),u=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexijianyi/electron-information-engineering-e40c4215-3078-42b3-8ab6-fe84c34d0a07.jpg",alt:""})],-1),m=t("\u6233\uFF1A"),f={href:"https://tobebetterjavaer.com/download/java.html",target:"_blank",rel:"noopener noreferrer"},v=t("\u8BA1\u7B97\u673A\u5FC5\u8BFB\u7ECF\u5178\u4E66\u5355\uFF08\u53EF download\uFF09\uFF01"),x=r('<p>\u8FD9\u91CC\u91CD\u7533\u4E00\u4E0B\u6211\u5B66\u4E60\u8BA1\u7B97\u673A\u7684\u7406\u8BBA\u89C2\u70B9\u5427\uFF0C\u5982\u679C\u8981\u8F6C\u8BA1\u7B97\u673A\u7684\u8BDD\uFF0C\u6211\u60F3\u5BF9\u4F60\u5FEB\u901F\u5EFA\u7ACB\u8D77\u81EA\u5DF1\u7684\u77E5\u8BC6\u4F53\u7CFB\u5F88\u6709\u5E2E\u52A9\uFF01</p><p>\u5982\u679C\u4F60\u8981\u5B66\u4E60\u7269\u7406\uFF0C\u6211\u63A8\u8350\u4F60\u987A\u7740\u7269\u7406\u7684\u53D1\u5C55\u53F2\u5B66\u4E60\uFF0C\u5148\u5B66\u4E60\u725B\u987F\u7684\u7ECF\u5178\u7269\u7406\uFF0C\u518D\u5B66\u4E60\u70ED\u529B\u5B66\u3001\u7535\u78C1\u5B66\uFF0C\u7136\u540E\u5B66\u4E60\u76F8\u5BF9\u8BBA\u3001\u91CF\u5B50\u529B\u5B66\u8FD9\u4E9B\u5F7B\u5E95\u63A8\u7FFB\u7ECF\u5178\u7269\u7406\u7684\uFF0C\u6700\u540E\u5B66\u4E60\u7535\u52A8\u529B\u5B66\u8FD9\u79CD\u786C\u6838\u7684\u3002</p><p>\u6574\u4E2A\u5B66\u4E60\u8FC7\u7A0B\uFF0C\u662F\u81EA\u5E95\u5411\u4E0A\u7684\u3002\u4F46\u662F\u5B66\u8BA1\u7B97\u673A\uFF0C\u8FD9\u6837\u884C\u4E0D\u901A\u3002</p><p>\u5148\u5B66\u4E60\u7535\u8DEF\uFF0C\u7136\u540E\u5B66\u4E60\u51AF\u8BFA\u4F9D\u66FC\u7ED3\u6784\uFF0C\u9020\u4E00\u53F0\u8BA1\u7B97\u673A\uFF1F\u63A5\u7740\u518D\u5B66\u4E60\u5982\u4F55\u7528\u6C47\u7F16\u5199\u4E2A 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\u5E76\u53D1\u7F16\u7A0B\u4E2D\u7684\u201C\u539F\u5B50\u6027\u201D\u3001\u201C\u540C\u6B65\u201D\u3001\u201C\u5F02\u6B65\u201D\u3001\u201C\u8FDB\u7A0B\u201D\u3001\u201C\u5185\u5B58\u5206\u914D\u201D\u8FD9\u4E9B\u6982\u5FF5\u7684\u65F6\u5019\uFF0C\u4F60\u81EA\u7136\u800C\u7136\u4F1A\u4EA7\u751F\u5F88\u591A\u7591\u95EE\uFF0C\u7136\u540E\u5C31\u4F1A\u53BB\u5B66\u4E60\u8BA1\u7B97\u673A\u7EC4\u6210\u539F\u7406\u3001\u64CD\u4F5C\u7CFB\u7EDF\uFF0C\u7136\u540E\u4F60\u7684\u4E00\u7CFB\u5217\u95EE\u9898\u5C31\u4F1A\u9010\u6E10\u88AB\u89E3\u51B3\u3002</p><p>\u5F53\u4F60\u53D1\u73B0\uFF0C\u7528 Java \u5B9E\u73B0\u67D0\u4E2A\u4E1A\u52A1\u9700\u6C42\u65F6\uFF0C\u4EBA\u5BB6\u7684\u7B97\u6CD5\u5B9E\u73B0\u6BD4\u4F60\u5FEB\u5F97\u591A\uFF0C\u4F60\u81EA\u7136\u4F1A\u597D\u5947\uFF0C\u4E3A\u4EC0\u4E48\u4F1A\u8FD9\u6837\uFF1F\u7136\u540E\u4F60\u53D1\u73B0\u4EBA\u5BB6\u7528\u7684\u6570\u636E\u7ED3\u6784\u548C\u4F60\u7684\u4E0D\u540C\uFF0C\u7136\u540E\u4F60\u5C31\u4F1A\u53BB\u5B66\u4E60\u6570\u636E\u7ED3\u6784\uFF0C\u63A5\u7740\u4E86\u89E3\u4E00\u4E9B\u9AD8\u6548\u7684\u7B97\u6CD5\uFF0C\u6BD4\u5982\u52A8\u6001\u89C4\u5212\u7B49\u3002</p><p><strong>\u90A3\u4E48\u63A5\u4E0B\u6765\uFF0C\u518D\u6765\u8BF4\u8BF4\u8BA1\u7B97\u673A\u4E13\u4E1A\u7684\u5B66\u4E60\u8DEF\u7EBF\u5427\uFF0C\u9700\u8981\u7684\u5B66\u4E60\u8DEF\u7EBF\u7684\u540C\u5B66\u53EF\u4EE5 mark \u4E86\uFF01\u975E\u5E38\u786C\u6838\uFF0C\u503C\u5F97\u6536\u85CF\u548C\u70B9\u8D5E\u3002</strong></p><h3 id="\u4E00\u3001java-\u8BED\u8A00\u57FA\u7840" tabindex="-1"><a class="header-anchor" href="#\u4E00\u3001java-\u8BED\u8A00\u57FA\u7840" aria-hidden="true">#</a> \u4E00\u3001Java\xA0\u8BED\u8A00\u57FA\u7840</h3>',10),j=t("\u521D\u5B66\u8005\u53EF\u4EE5\u5230\u901A\u8FC7\u300A"),w={href:"https://tobebetterjavaer.com",target:"_blank",rel:"noopener noreferrer"},C=t("Java \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF"),S=t("\u300B\u8FDB\u884C\u5B66\u4E60\uFF0C\u4E5F\u5C31\u662F\u672C\u7AD9\uFF0C\u8FD9\u662F\u4E00\u4E2A\u98CE\u8DA3\u5E7D\u9ED8\u3001\u901A\u4FD7\u6613\u61C2\u7684 Java \u6559\u7A0B\uFF0C\u5BF9 Java \u521D\u5B66\u8005\u6781\u5EA6\u53CB\u597D\u548C\u8212\u9002\uFF0C\u5185\u5BB9\u5305\u62EC\u4F46\u4E0D\u9650\u4E8E Java \u8BED\u6CD5\u3001Java \u96C6\u5408\u6846\u67B6\u3001Java IO\u3001Java \u5E76\u53D1\u7F16\u7A0B\u3001Java \u865A\u62DF\u673A\u7B49\u6838\u5FC3\u77E5\u8BC6\u70B9\u3002"),I=t("\u66F4\u8BE6\u7EC6\u7684\u5B66\u4E60\u8DEF\u7EBF\u6233\uFF1A"),k={href:"https://tobebetterjavaer.com/xuexiluxian/java/yitiaolong.html",target:"_blank",rel:"noopener noreferrer"},y=t("https://tobebetterjavaer.com/xuexiluxian/java/yitiaolong.html"),B=r('<h3 id="\u4E8C\u3001\u5F00\u53D1\u6846\u67B6" tabindex="-1"><a class="header-anchor" href="#\u4E8C\u3001\u5F00\u53D1\u6846\u67B6" aria-hidden="true">#</a> \u4E8C\u3001\u5F00\u53D1\u6846\u67B6</h3><p>\u53EF\u80FD\u5F88\u591A\u4EBA\u4F1A\u5BF9\u5F00\u53D1\u6846\u67B6\u55E4\u4E4B\u4EE5\u9F3B\uFF0C\u611F\u89C9\u5B66\u8FD9\u4E2A\u6CA1\u591A\u5927\u7528\u5904\uFF0C\u63D0\u5347\u4E0D\u4E86\u4F60\u7684\u6280\u672F\u529F\u5E95\u3002\u4F46\u662F\u5462\uFF0C\u5982\u679C\u4F60\u60F3\u505A\u7EC3\u624B\u9879\u76EE\uFF0C\u6CA1\u6709\u5F00\u53D1\u6846\u67B6\u7684\u5E2E\u52A9\uFF0C\u5F88\u96BE\u3002</p><p>Java \u4E4B\u6240\u4EE5\u6D41\u884C\uFF0C\u5F88\u91CD\u8981\u7684\u4E00\u90E8\u5206\u539F\u56E0\u5C31\u662F\u62E5\u6709 Spring \u7CFB\u5217\u6846\u67B6\u8FD9\u4E2A\u5927\u6740\u5668\uFF0C\u5305\u62EC SSM\uFF08Spring+SpringMVC+MyBatis\uFF09\u3001Spring Boot\u3001Spring Cloud\u3002</p><p>\u6211\u4EEC\u53EA\u662F\u4E0D\u5E94\u8BE5\u505C\u7559\u5728\u53EA\u4F1A\u7528\u7684\u5C42\u9762\u4E0A\uFF0C\u8981\u61C2\u80CC\u540E\u7684\u539F\u7406\u3002\u8BF4\u4E00\u5343\u9053\u4E00\u4E07\uFF0CSpring \u7684\u6838\u5FC3\u5C31\u4E24\u4E2A\u6982\u5FF5\uFF1AAOP\u3001IoC\u3002</p><p>AOP\uFF08Aspect-Oriented Programming\uFF09\uFF0C\u4E5F\u5C31\u662F\u9762\u5411\u5207\u9762\u7F16\u7A0B\uFF0C\u80FD\u591F\u5C06\u90A3\u4E9B\u4E0E\u4E1A\u52A1\u65E0\u5173\uFF0C\u5374\u4E3A\u4E1A\u52A1\u6A21\u5757\u6240\u5171\u540C\u8C03\u7528\u7684\u903B\u8F91\u6216\u8D23\u4EFB\uFF08\u4F8B\u5982\u4E8B\u52A1\u5904\u7406\u3001\u65E5\u5FD7\u7BA1\u7406\u3001\u6743\u9650\u63A7\u5236\u7B49\uFF09\u5C01\u88C5\u8D77\u6765\uFF0C\u4FBF\u4E8E\u51CF\u5C11\u7CFB\u7EDF\u7684\u91CD\u590D\u4EE3\u7801\uFF0C\u964D\u4F4E\u6A21\u5757\u95F4\u7684\u8026\u5408\u5EA6\uFF0C\u5E76\u6709\u5229\u4E8E\u672A\u6765\u7684\u53EF\u62D3\u5C55\u6027\u548C\u53EF\u7EF4\u62A4\u6027\u3002</p><p>IoC\uFF08Inverse of Control\uFF09\uFF0C\u4E5F\u5C31\u662F\u63A7\u5236\u53CD\u8F6C\uFF0C\u662F\u4E00\u79CD\u8BBE\u8BA1\u601D\u60F3\uFF0C\u5C31\u662F\u5C06\u539F\u672C\u5728\u7A0B\u5E8F\u4E2D\u624B\u52A8\u521B\u5EFA\u5BF9\u8C61\u7684\u63A7\u5236\u6743\uFF0C\u4EA4\u7531 Spring \u6846\u67B6\u6765\u7BA1\u7406\u3002</p><p>\u5148\u5B66\u4E60 SSM\uFF0C\u518D\u5B66\u4E60 Spring Boot\u3002Spring Boot \u7684\u51FA\u73B0\uFF0C\u5E76\u4E0D\u610F\u5473\u7740 Spring \u548C SpringMVC \u5DF2\u7ECF\u8FC7\u65F6\u4E86\uFF0C\u4ECE\u8BBE\u8BA1\u76EE\u7684\u4E0A\u6765\u8BF4\uFF0CSpring Boot \u53EA\u662F\u5B9E\u73B0\u4E86 Spring \u7684\u81EA\u52A8\u88C5\u914D\uFF0C\u964D\u4F4E\u4E86\u9879\u76EE\u642D\u5EFA\u7684\u96BE\u5EA6\u3002</p><p>\u4ECE\u6280\u672F\u89D2\u5EA6\u6765\u8BF4\uFF0CSpring Boot \u7684\u5E95\u5C42\u4F9D\u7136\u662F Spring \u7684\u6838\u5FC3\u673A\u5236\uFF0C\u4E5F\u5C31\u662F AOP \u548C IoC\uFF0CSpring Boot \u53EA\u662F\u4E00\u4E2A\u627F\u8F7D\u8005\u3002\u5728\u6211\u770B\u6765\uFF0C\u5B66\u4E60 Spring \u7684\u6B63\u786E\u8DEF\u5F84\u5E94\u8BE5\u662F Spring -&gt; Servlet -&gt; Spring MVC -&gt; Spring Boot\u3002</p><h3 id="\u4E09\u3001\u6570\u636E\u5E93" tabindex="-1"><a class="header-anchor" href="#\u4E09\u3001\u6570\u636E\u5E93" aria-hidden="true">#</a> \u4E09\u3001\u6570\u636E\u5E93</h3><p>\u589E\u5220\u6539\u67E5\uFF0C\u589E\u5220\u6539\u67E5\uFF0C\u8981\u60F3\u505A\u4E00\u540D\u53EA\u4F1A CRUD \u7684\u7A0B\u5E8F\u5458\uFF0C\u6570\u636E\u5E93\u8FD9\u5757\u662F\u9003\u4E0D\u6389\u7684\u3002\u4E0D\u8FC7\uFF0C\u8FD9\u91CC\u5C31\u4E0D\u91CD\u70B9\u8BF4\u4E86\uFF0C\u63A8\u8350\u4E00\u4E9B\u8D44\u6E90\u7ED9\u5927\u5BB6\u3002</p><p>\u5C0F\u7834\u7AD9\u4E0A\u7684\u4E09\u4E2A\u89C6\u9891\u3002</p>',11),M=t("SQL\uFF1A"),J={href:"https://www.bilibili.com/video/BV1UE41147KC",target:"_blank",rel:"noopener noreferrer"},P=t("https://www.bilibili.com/video/BV1UE41147KC"),A=t("MySQL\uFF1A"),L={href:"https://www.bilibili.com/video/BV12b411K7Zu",target:"_blank",rel:"noopener noreferrer"},V=t("https://www.bilibili.com/video/BV12b411K7Zu"),T=t("Redis\uFF1A"),R={href:"https://www.bilibili.com/video/BV1S54y1R7SB",target:"_blank",rel:"noopener noreferrer"},U=t("https://www.bilibili.com/video/BV1S54y1R7SB"),E=r('<p>\u56DB\u672C\u4E66\u3002</p><ul><li>\u300ASQL \u5FC5\u77E5\u5FC5\u4F1A\u300B</li><li>\u300A\u9AD8\u6027\u80FD MySQL\u300B</li><li>\u300AMySQL \u6280\u672F\u5185\u5E55-InnoDB \u5B58\u50A8\u5F15\u64CE\u300B</li><li>\u300ARedis \u6DF1\u5165\u5386\u9669\u6838\u5FC3\u539F\u7406\u4E0E\u5E94\u7528\u5B9E\u6218\u300B</li></ul><h3 id="\u56DB\u3001\u8BA1\u7B97\u673A\u7EC4\u6210\u539F\u7406" tabindex="-1"><a class="header-anchor" href="#\u56DB\u3001\u8BA1\u7B97\u673A\u7EC4\u6210\u539F\u7406" aria-hidden="true">#</a> \u56DB\u3001\u8BA1\u7B97\u673A\u7EC4\u6210\u539F\u7406</h3><p>\u8BA1\u7B97\u673A\u662F\u7531 CPU\u3001\u5185\u5B58\u3001\u8F93\u5165\u8F93\u51FA\u8BBE\u5907\uFF0C\u8FD9\u4E9B\u786C\u4EF6\u7EC4\u6210\u7684\uFF0C\u4F46\u6211\u4EEC\u7A0B\u5E8F\u5458\uFF0C\u5F80\u5F80\u4ECE\u4E8B\u7684\u662F\u8F6F\u4EF6\u5F00\u53D1\u7684\u5DE5\u4F5C\uFF0C\u600E\u4E48\u5728\u786C\u4EF6\u548C\u8F6F\u4EF6\u4E4B\u95F4\u642D\u8D77\u4E00\u5EA7\u6865\u6881\u5462\uFF1F</p><p>\u7B54\u6848\u5C31\u662F\u5B66\u4E60\u8BA1\u7B97\u673A\u7EC4\u6210\u539F\u7406\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexijianyi/electron-information-engineering-5270d8c0-5e03-4a06-924c-c9a8d25dd446.jpg" alt=""></p><p>\u8BA1\u7B97\u673A\u7EC4\u6210\u539F\u7406\u7684\u77E5\u8BC6\u70B9\u53EF\u4EE5\u62C6\u5206\u4E3A\u56DB\u4E2A\u90E8\u5206\uFF1A</p><ul><li>\u8BA1\u7B97\u673A\u7684\u57FA\u672C\u7EC4\u6210\u786C\u4EF6</li><li>\u8BA1\u7B97\u673A\u7684\u6307\u4EE4\u548C\u8BA1\u7B97</li><li>\u5904\u7406\u5668\u6D89\u53CA</li><li>\u5B58\u50A8\u5668\u548C IO \u8BBE\u5907</li></ul><p>\u6309\u7167\u51AF\u8BFA\u4F9D\u66FC\u7684\u4F53\u7CFB\u7ED3\u6784\uFF0C\u8BA1\u7B97\u673A\u5206\u4E3A\u8FD0\u7B97\u5668\u3001\u63A7\u5236\u5668\u3001\u5B58\u50A8\u5668\u3001\u8F93\u5165\u8F93\u51FA\u8BBE\u5907\uFF1B\u6211\u4EEC\u7F16\u5199\u7684\u4EE3\u7801\uFF0C\u8981\u60F3\u5728\u8BA1\u7B97\u673A\u4E0A\u8FD0\u884C\uFF0C\u5C31\u9700\u8981\u901A\u8FC7\u7F16\u8BD1\u5668\u8F6C\u6210\u6C47\u7F16\u4EE3\u7801\uFF0C\u518D\u7ECF\u8FC7\u6C47\u7F16\u5668\u8F6C\u6210\u4E00\u6761\u6761\u6307\u4EE4\uFF0C\u8FD9\u4E9B\u6307\u4EE4\u7684\u6267\u884C\uFF0C\u662F\u7531\u63A7\u5236\u5668\u6765\u5B8C\u6210\u7684\u3002</p><p><strong>\u8BA1\u7B97\u673A\u7EC4\u6210\u539F\u7406\u8BE5\u600E\u4E48\u5B66\u5462</strong>\uFF1F</p><p>\u5982\u679C\u82F1\u8BED\u529F\u5E95\u975E\u5E38\u4E0D\u9519\u7684\u8BDD\uFF0C\u5B89\u5229\u4E00\u95E8 Coursera \u4E0A\u7684\u8BFE\u7A0B\uFF0C\u4ECE\u4E0E\u975E\u95E8\u5230\u4FC4\u7F57\u65AF\u65B9\u5757\uFF0C\u7B80\u5355\u6765\u8BF4\uFF0C\u8FD9\u95E8\u8BFE\u4F1A\u6559\u4F60\u600E\u4E48\u4ECE\u4E0E\u975E\u95E8\u5F00\u59CB\u9020\u4E00\u53F0\u8BA1\u7B97\u673A\u3002</p>',11),O=t("\u5730\u5740\uFF1A"),Q={href:"https://www.coursera.org/learn/build-a-computer%E2%80%8Bwww.coursera.org/learn/build-a-computer",target:"_blank",rel:"noopener noreferrer"},D=t("https://www.coursera.org/learn/build-a-computer\u200Bwww.coursera.org/learn/build-a-computer"),N=e("p",null,"\u8FD9\u95E8\u8BFE\u7684\u89C6\u9891\u62CD\u7684\u90A3\u53EB\u4E00\u4E2A\u4F18\u8D28\uFF0C\u867D\u7136\u6CA1\u6709\u4E2D\u6587\u7FFB\u8BD1\uFF0C\u4F46\u89C6\u9891\u4E0B\u65B9\u7684\u5B57\u5E55\u4F1A\u6709\u8282\u594F\u7684\u79FB\u52A8\u3002",-1),F=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexijianyi/electron-information-engineering-a5f13f0d-c0e1-486a-933a-7bfa81983a6c.jpg",alt:""})],-1),q=t("\u56FD\u5185\u7684\u63A8\u8350\u54C8\u5DE5\u5927\u7684\u8FD9\u95E8\u89C6\u9891\u8BFE\uFF0C\u6574\u4F53\u8BC4\u4EF7\u975E\u5E38\u9AD8\uFF08\u5EFA\u8BAE 1.5 \u500D\u901F\u98DF\u7528\uFF09\uFF0C\u6233\uFF1A"),K={href:"https://www.bilibili.com/video/BV1WW411Q7PF",target:"_blank",rel:"noopener noreferrer"},W=t("\u8BA1\u7B97\u673A\u7EC4\u6210\u539F\u7406\uFF08\u5510\u6714\u98DE\uFF09_\u54D4\u54E9\u54D4\u54E9_bilibili"),z=r('<h3 id="\u4E94\u3001\u6570\u636E\u7ED3\u6784\u4E0E\u7B97\u6CD5" tabindex="-1"><a class="header-anchor" href="#\u4E94\u3001\u6570\u636E\u7ED3\u6784\u4E0E\u7B97\u6CD5" aria-hidden="true">#</a> \u4E94\u3001\u6570\u636E\u7ED3\u6784\u4E0E\u7B97\u6CD5</h3><p>\u53EF\u80FD\u6709\u4EBA\u4F1A\u89C9\u5F97\uFF1A\u5C31\u7B97\u4E0D\u61C2\u6570\u636E\u7ED3\u6784\u4E0E\u7B97\u6CD5\uFF0C\u7167\u6837\u53EF\u4EE5\u628A Java API\u3001\u5F00\u53D1\u6846\u67B6\u7528\u5F97\u98DE\u8D77\uFF1F</p><p>\u4F46\u8FD9\u91CC\u6211\u60F3\u8868\u8FBE\u7684\u662F\uFF1A</p><p><strong>1\uFF09\u6570\u636E\u7ED3\u6784\u4E0E\u7B97\u6CD5\u662F\u5F88\u591A\u5927\u5382\u7B5B\u9009\u4EBA\u624D\u7684\u8981\u7D20\u4E4B\u4E00</strong>\u3002</p><p>\u8FD9\u662F\u56E0\u4E3A\u6821\u62DB\u7684\u65F6\u5019\uFF0C\u53C2\u52A0\u9762\u8BD5\u7684\u5B66\u751F\u5927\u591A\u6570\u90FD\u662F\u6CA1\u6709\u5B9E\u9645\u9879\u76EE\u7ECF\u9A8C\u7684\uFF0C\u516C\u53F8\u53EA\u80FD\u901A\u8FC7\u8003\u5BDF\u8FD9\u4E9B\u57FA\u7840\u77E5\u8BC6\u6765\u7B5B\u9009\u3002</p><p>\u5927\u5382\u4E0D\u6015\u4F60\u6CA1\u6709\u9879\u76EE\u7ECF\u9A8C\uFF0C\u800C\u6015\u4F60\u6CA1\u6709\u957F\u671F\u53D1\u5C55\u7684\u6F5C\u529B\u3002\u6240\u4EE5\uFF0C\u5F88\u591A\u53C2\u52A0\u6821\u62DB\u7684\u540C\u5B66\uFF0C\u5728\u9762\u8BD5\u524D\u90FD\u4F1A\u75AF\u72C2\u5237\u9898\u7684\uFF0C\u81F3\u5C11\u4F1A\u7A81\u51FB\u4E2A 100 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6.006\uFF0C\u662F\u7ECF\u5178\u7684\u6570\u636E\u7ED3\u6784\u548C\u7B97\u6CD5\u5165\u95E8\u8BFE\u7A0B\uFF0C\u6D89\u53CA\u5230\u6392\u5E8F\u3001\u54C8\u5E0C\u3001\u56FE\u8BBA\u3001\u52A8\u6001\u89C4\u5212\u3002</p>',17),Z={href:"https://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-006-introduction-to-algorithms-fall-2011/",target:"_blank",rel:"noopener noreferrer"},H=t("https://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-006-introduction-to-algorithms-fall-2011/"),G=e("p",null,"\u56FD\u5185\u7684\u63A8\u8350\u6D59\u6C5F\u5927\u5B66\u7684\u4E00\u4E2A\u7684\u8BFE\u7A0B\uFF0C\u5F88\u7CFB\u7EDF\u5F88\u7ECF\u5178\uFF0C\u9002\u5408\u5C0F\u767D\u5165\u95E8\u3002",-1),X={href:"https://www.bilibili.com/video/BV1JW411i731",target:"_blank",rel:"noopener noreferrer"},Y=t("\u6570\u636E\u7ED3\u6784-\u6D59\u6C5F\u5927\u5B66_\u54D4\u54E9\u54D4\u54E9_bilibili"),$=e("p",null,"\u81F3\u4E8E\u7EC3\u4E60\uFF0C\u63A8\u8350\u5230 LeetCode 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noreferrer"},re=t("https://tobebetterjavaer.com/xuexiluxian/algorithm.html"),ie=r('<h3 id="\u516D\u3001\u64CD\u4F5C\u7CFB\u7EDF" tabindex="-1"><a class="header-anchor" href="#\u516D\u3001\u64CD\u4F5C\u7CFB\u7EDF" aria-hidden="true">#</a> 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src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexijianyi/electron-information-engineering-52358273-5b8b-416a-b466-986b5f3ee96a.jpg" alt=""></p><p>\u64CD\u4F5C\u7CFB\u7EDF\u4E2D\u7684\u5F88\u591A\u601D\u60F3\u548C\u7ECF\u5178\u7B97\u6CD5\uFF0C\u90FD\u53EF\u4EE5\u5728\u65E5\u5E38\u5F00\u53D1\u4F7F\u7528\u7684\u5404\u79CD\u5DE5\u5177\u6216\u8005\u6846\u67B6\u4E2D\u627E\u5230\u5F71\u5B50\u3002</p><p>\u6BD4\u5982\u8BF4 Redis \u548C\u64CD\u4F5C\u7CFB\u7EDF\u7684\u9AD8\u901F\u7F13\u5B58\u5C31\u5F88\u50CF\uFF0CRedis \u662F\u7528\u6765\u89E3\u51B3\u7A0B\u5E8F\u5904\u7406\u901F\u5EA6\u548C\u8BBF\u95EE MySQL \u901F\u5EA6\u4E0D\u5BF9\u7B49\u7684\u95EE\u9898\uFF0C\u800C\u5185\u5B58\u5C31\u662F\u7528\u6765\u89E3\u51B3 CPU \u5904\u7406\u901F\u5EA6\u548C\u8BBF\u95EE\u78C1\u76D8\u7B49\u5916\u5B58\u901F\u5EA6\u4E0D\u5BF9\u7B49\u7684\u95EE\u9898\u3002</p><p>\u50CF\u64CD\u4F5C\u7CFB\u7EDF\uFF0C\u56FD\u5185\u901A\u5E38\u4F1A\u8003 PPT 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+++ b/dist/assets/enum.html.637c7ac9.js
@@ -1,4 +1,4 @@
-import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e as p}from"./app.a0271b9c.js";const e={},t=p(`<h1 id="java\u679A\u4E3E-enum" tabindex="-1"><a class="header-anchor" href="#java\u679A\u4E3E-enum" aria-hidden="true">#</a> Java\u679A\u4E3E\uFF08enum\uFF09</h1><p>\u201C\u4ECA\u5929\u6211\u4EEC\u6765\u5B66\u4E60\u679A\u4E3E\u5427\uFF0C\u4E09\u59B9\uFF01\u201D\u6211\u8BF4\uFF0C\u201C\u540C\u5B66\u8BA9\u4F60\u53BB\u5979\u5BB6\u73A9\u4E86\u4E24\u5929\uFF0C\u611F\u89C9\u600E\u4E48\u6837\u5440\uFF1F\u201D</p><p>\u201C\u5FC3\u60C5\u653E\u677E\u4E86\u4E0D\u5C11\u3002\u201D\u4E09\u59B9\u8BF4\uFF0C\u201C\u53EF\u4EE5\u5F00\u59CB\u5B66 Java \u4E86\uFF0C\u4E8C\u54E5\u3002\u201D</p><p>\u201COK\u3002\u201D</p><p>\u201C\u679A\u4E3E\uFF08enum\uFF09\uFF0C\u662F Java 1.5 \u65F6\u5F15\u5165\u7684\u5173\u952E\u5B57\uFF0C\u5B83\u8868\u793A\u4E00\u79CD\u7279\u6B8A\u7C7B\u578B\u7684\u7C7B\uFF0C\u7EE7\u627F\u81EA java.lang.Enum\u3002\u201D</p><p>\u201C\u6211\u4EEC\u6765\u65B0\u5EFA\u4E00\u4E2A\u679A\u4E3E PlayerType\u3002\u201D</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">enum</span> <span class="token class-name">PlayerType</span> <span class="token punctuation">{</span>
+import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e as p}from"./app.615e41d8.js";const e={},t=p(`<h1 id="java\u679A\u4E3E-enum" tabindex="-1"><a class="header-anchor" href="#java\u679A\u4E3E-enum" aria-hidden="true">#</a> Java\u679A\u4E3E\uFF08enum\uFF09</h1><p>\u201C\u4ECA\u5929\u6211\u4EEC\u6765\u5B66\u4E60\u679A\u4E3E\u5427\uFF0C\u4E09\u59B9\uFF01\u201D\u6211\u8BF4\uFF0C\u201C\u540C\u5B66\u8BA9\u4F60\u53BB\u5979\u5BB6\u73A9\u4E86\u4E24\u5929\uFF0C\u611F\u89C9\u600E\u4E48\u6837\u5440\uFF1F\u201D</p><p>\u201C\u5FC3\u60C5\u653E\u677E\u4E86\u4E0D\u5C11\u3002\u201D\u4E09\u59B9\u8BF4\uFF0C\u201C\u53EF\u4EE5\u5F00\u59CB\u5B66 Java \u4E86\uFF0C\u4E8C\u54E5\u3002\u201D</p><p>\u201COK\u3002\u201D</p><p>\u201C\u679A\u4E3E\uFF08enum\uFF09\uFF0C\u662F Java 1.5 \u65F6\u5F15\u5165\u7684\u5173\u952E\u5B57\uFF0C\u5B83\u8868\u793A\u4E00\u79CD\u7279\u6B8A\u7C7B\u578B\u7684\u7C7B\uFF0C\u7EE7\u627F\u81EA java.lang.Enum\u3002\u201D</p><p>\u201C\u6211\u4EEC\u6765\u65B0\u5EFA\u4E00\u4E2A\u679A\u4E3E PlayerType\u3002\u201D</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">enum</span> <span class="token class-name">PlayerType</span> <span class="token punctuation">{</span>
     TENNIS<span class="token punctuation">,</span>
     FOOTBALL<span class="token punctuation">,</span>
     BASKETBALL
diff --git a/dist/assets/equals-hashcode.html.6e080022.js b/dist/assets/equals-hashcode.html.033e729f.js
similarity index 99%
rename from dist/assets/equals-hashcode.html.6e080022.js
rename to dist/assets/equals-hashcode.html.033e729f.js
index c45dbc6f..8fc17342 100644
--- a/dist/assets/equals-hashcode.html.6e080022.js
+++ b/dist/assets/equals-hashcode.html.033e729f.js
@@ -1,4 +1,4 @@
-import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e as p}from"./app.a0271b9c.js";const t={},e=p(`<h1 id="\u4E00\u6B21\u6027\u641E\u6E05\u695Aequals\u548Chashcode" tabindex="-1"><a class="header-anchor" href="#\u4E00\u6B21\u6027\u641E\u6E05\u695Aequals\u548Chashcode" aria-hidden="true">#</a> \u4E00\u6B21\u6027\u641E\u6E05\u695Aequals\u548ChashCode</h1><p>\u201C\u4E8C\u54E5\uFF0C\u6211\u5728\u8BFB\u300AEffective Java\u300B \u7684\u65F6\u5019\uFF0C\u7B2C 11 \u6761\u89C4\u7EA6\u8BF4\u91CD\u5199 equals \u7684\u65F6\u5019\u5FC5\u987B\u8981\u91CD\u5199 hashCode \u65B9\u6CD5\uFF0C\u8FD9\u662F\u4E3A\u4EC0\u4E48\u5440\uFF1F\u201D\u4E09\u59B9\u5355\u5200\u76F4\u5165\u5730\u95EE\u3002</p><p>\u201C\u4E09\u59B9\u554A\uFF0C\u8FD9\u4E2A\u95EE\u9898\u95EE\u5F97\u975E\u5E38\u597D\uFF0C\u56E0\u4E3A\u5B83\u4E5F\u662F\u9762\u8BD5\u4E2D\u7ECF\u5E38\u8003\u7684\u4E00\u4E2A\u77E5\u8BC6\u70B9\u3002\u4ECA\u5929\u54E5\u5C31\u5E26\u4F60\u6765\u68B3\u7406\u4E00\u4E0B\u3002\u201D\u6211\u8BF4\u3002</p><p>Java \u662F\u4E00\u95E8\u9762\u5411\u5BF9\u8C61\u7684\u7F16\u7A0B\u8BED\u8A00\uFF0C\u6240\u6709\u7684\u7C7B\u90FD\u4F1A\u9ED8\u8BA4\u7EE7\u627F\u81EA Object \u7C7B\uFF0C\u800C Object \u7684\u4E2D\u6587\u610F\u601D\u5C31\u662F\u201C\u5BF9\u8C61\u201D\u3002</p><p>Object \u7C7B\u4E2D\u6709\u8FD9\u4E48\u4E24\u4E2A\u65B9\u6CD5\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">native</span> <span class="token keyword">int</span> <span class="token function">hashCode</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
+import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e as p}from"./app.615e41d8.js";const t={},e=p(`<h1 id="\u4E00\u6B21\u6027\u641E\u6E05\u695Aequals\u548Chashcode" tabindex="-1"><a class="header-anchor" href="#\u4E00\u6B21\u6027\u641E\u6E05\u695Aequals\u548Chashcode" aria-hidden="true">#</a> \u4E00\u6B21\u6027\u641E\u6E05\u695Aequals\u548ChashCode</h1><p>\u201C\u4E8C\u54E5\uFF0C\u6211\u5728\u8BFB\u300AEffective Java\u300B \u7684\u65F6\u5019\uFF0C\u7B2C 11 \u6761\u89C4\u7EA6\u8BF4\u91CD\u5199 equals \u7684\u65F6\u5019\u5FC5\u987B\u8981\u91CD\u5199 hashCode \u65B9\u6CD5\uFF0C\u8FD9\u662F\u4E3A\u4EC0\u4E48\u5440\uFF1F\u201D\u4E09\u59B9\u5355\u5200\u76F4\u5165\u5730\u95EE\u3002</p><p>\u201C\u4E09\u59B9\u554A\uFF0C\u8FD9\u4E2A\u95EE\u9898\u95EE\u5F97\u975E\u5E38\u597D\uFF0C\u56E0\u4E3A\u5B83\u4E5F\u662F\u9762\u8BD5\u4E2D\u7ECF\u5E38\u8003\u7684\u4E00\u4E2A\u77E5\u8BC6\u70B9\u3002\u4ECA\u5929\u54E5\u5C31\u5E26\u4F60\u6765\u68B3\u7406\u4E00\u4E0B\u3002\u201D\u6211\u8BF4\u3002</p><p>Java \u662F\u4E00\u95E8\u9762\u5411\u5BF9\u8C61\u7684\u7F16\u7A0B\u8BED\u8A00\uFF0C\u6240\u6709\u7684\u7C7B\u90FD\u4F1A\u9ED8\u8BA4\u7EE7\u627F\u81EA Object \u7C7B\uFF0C\u800C Object \u7684\u4E2D\u6587\u610F\u601D\u5C31\u662F\u201C\u5BF9\u8C61\u201D\u3002</p><p>Object \u7C7B\u4E2D\u6709\u8FD9\u4E48\u4E24\u4E2A\u65B9\u6CD5\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">native</span> <span class="token keyword">int</span> <span class="token function">hashCode</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 
 <span class="token keyword">public</span> <span class="token keyword">boolean</span> <span class="token function">equals</span><span class="token punctuation">(</span><span class="token class-name">Object</span> obj<span class="token punctuation">)</span> <span class="token punctuation">{</span>
         <span class="token keyword">return</span> <span class="token punctuation">(</span><span class="token keyword">this</span> <span class="token operator">==</span> obj<span class="token punctuation">)</span><span class="token punctuation">;</span>
diff --git a/dist/assets/equals.html.b49827b6.js b/dist/assets/equals.html.f7e52978.js
similarity index 99%
rename from dist/assets/equals.html.b49827b6.js
rename to dist/assets/equals.html.f7e52978.js
index 5d21dffd..e8d0c47d 100644
--- a/dist/assets/equals.html.b49827b6.js
+++ b/dist/assets/equals.html.f7e52978.js
@@ -1,4 +1,4 @@
-import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e as p}from"./app.a0271b9c.js";const t={},e=p(`<h1 id="java\u5224\u65AD\u4E24\u4E2A\u5B57\u7B26\u4E32\u662F\u5426\u76F8\u7B49" tabindex="-1"><a class="header-anchor" href="#java\u5224\u65AD\u4E24\u4E2A\u5B57\u7B26\u4E32\u662F\u5426\u76F8\u7B49" aria-hidden="true">#</a> Java\u5224\u65AD\u4E24\u4E2A\u5B57\u7B26\u4E32\u662F\u5426\u76F8\u7B49\uFF1F</h1><p>\u201C\u54E5\uFF0C\u5982\u4F55\u6BD4\u8F83\u4E24\u4E2A\u5B57\u7B26\u4E32\u76F8\u7B49\u554A\uFF1F\u201D\u4E09\u59B9\u95EE\u3002</p><p>\u201C\u8FD9\u4E2A\u95EE\u9898\u770B\u4F3C\u7B80\u5355\uFF0C\u5374\u5728 Stack Overflow \u4E0A\u6709\u8D85\u8FC7 370 \u4E07\u7684\u8BBF\u95EE\u91CF\u3002\u201D\u6211\u8BF4\uFF0C\u201C\u8FD9\u4E2A\u95EE\u9898\u4E5F\u53EF\u4EE5\u5F15\u7533\u4E3A <code>.equals()</code> \u548C \u2018==\u2019 \u64CD\u4F5C\u7B26\u6709\u4EC0\u4E48\u533A\u522B\u3002\u201D</p><ul><li>\u201C==\u201D\u64CD\u4F5C\u7B26\u7528\u4E8E\u6BD4\u8F83\u4E24\u4E2A\u5BF9\u8C61\u7684\u5730\u5740\u662F\u5426\u76F8\u7B49\u3002</li><li><code>.equals()</code> \u65B9\u6CD5\u7528\u4E8E\u6BD4\u8F83\u4E24\u4E2A\u5BF9\u8C61\u7684\u5185\u5BB9\u662F\u5426\u76F8\u7B49\u3002</li></ul><p>\u201C\u4E0D\u662F\u5F88\u7406\u89E3\u3002\u201D\u4E09\u59B9\u611F\u5230\u5F88\u56F0\u60D1\u3002</p><p>\u201C\u6211\u6765\u4E3E\u4E2A\u4E0D\u6070\u5F53\u53C8\u5F88\u6070\u5F53\u7684\u4F8B\u5B50\uFF0C\u4E00\u770B\u4F60\u5C31\u660E\u767D\u4E86\uFF0C\u4E09\u59B9\u3002\u201D</p><p>\u6709\u4E00\u5BF9\u53CC\u80DE\u80CE\uFF0C\u59D0\u59D0\u53EB\u963F\u4E3D\u5854\uFF0C\u59B9\u59B9\u53EB\u6D1B\u4E3D\u5854\u3002\u6211\u4EEC\u666E\u901A\u4EBA\u53EF\u80FD\u5B8C\u5168\u65E0\u6CD5\u5206\u8FA8\u8C01\u662F\u59D0\u59D0\u8C01\u662F\u59B9\u59B9\uFF0C\u53EF\u5979\u4EEC\u7684\u5988\u5988\u5374\u53EF\u4EE5\u8F7B\u800C\u6613\u4E3E\u5730\u8FA8\u8BA4\u51FA\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/string/equals-01.png" alt=""></p><p><code>.equals()</code> \u5C31\u597D\u50CF\u6211\u4EEC\u666E\u901A\u4EBA\uFF0C\u770B\u89C1\u963F\u4E3D\u5854\u4EE5\u4E3A\u662F\u6D1B\u4E3D\u5854\uFF0C\u770B\u89C1\u6D1B\u4E3D\u5854\u4EE5\u4E3A\u662F\u963F\u4E3D\u5854\uFF0C\u770B\u8D77\u6765\u4E00\u6837\u5C31\u89C9\u5F97\u5979\u4EEC\u662F\u540C\u4E00\u4E2A\u4EBA\uFF1B\u201C==\u201D\u64CD\u4F5C\u7B26\u5C31\u597D\u50CF\u5979\u4EEC\u7684\u5988\u5988\uFF0C\u8981\u6C42\u66F4\u4E25\u683C\uFF0C\u89C2\u5BDF\u66F4\u7EC6\u81F4\uFF0C\u4E00\u773C\u5C31\u80FD\u5206\u8FA8\u51FA\u8C01\u662F\u59D0\u59D0\u8C01\u662F\u59B9\u59B9\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">String</span> alita <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">String</span><span class="token punctuation">(</span><span class="token string">&quot;\u5C0F\u841D\u8389&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
+import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e as p}from"./app.615e41d8.js";const t={},e=p(`<h1 id="java\u5224\u65AD\u4E24\u4E2A\u5B57\u7B26\u4E32\u662F\u5426\u76F8\u7B49" tabindex="-1"><a class="header-anchor" href="#java\u5224\u65AD\u4E24\u4E2A\u5B57\u7B26\u4E32\u662F\u5426\u76F8\u7B49" aria-hidden="true">#</a> Java\u5224\u65AD\u4E24\u4E2A\u5B57\u7B26\u4E32\u662F\u5426\u76F8\u7B49\uFF1F</h1><p>\u201C\u54E5\uFF0C\u5982\u4F55\u6BD4\u8F83\u4E24\u4E2A\u5B57\u7B26\u4E32\u76F8\u7B49\u554A\uFF1F\u201D\u4E09\u59B9\u95EE\u3002</p><p>\u201C\u8FD9\u4E2A\u95EE\u9898\u770B\u4F3C\u7B80\u5355\uFF0C\u5374\u5728 Stack Overflow \u4E0A\u6709\u8D85\u8FC7 370 \u4E07\u7684\u8BBF\u95EE\u91CF\u3002\u201D\u6211\u8BF4\uFF0C\u201C\u8FD9\u4E2A\u95EE\u9898\u4E5F\u53EF\u4EE5\u5F15\u7533\u4E3A <code>.equals()</code> \u548C \u2018==\u2019 \u64CD\u4F5C\u7B26\u6709\u4EC0\u4E48\u533A\u522B\u3002\u201D</p><ul><li>\u201C==\u201D\u64CD\u4F5C\u7B26\u7528\u4E8E\u6BD4\u8F83\u4E24\u4E2A\u5BF9\u8C61\u7684\u5730\u5740\u662F\u5426\u76F8\u7B49\u3002</li><li><code>.equals()</code> \u65B9\u6CD5\u7528\u4E8E\u6BD4\u8F83\u4E24\u4E2A\u5BF9\u8C61\u7684\u5185\u5BB9\u662F\u5426\u76F8\u7B49\u3002</li></ul><p>\u201C\u4E0D\u662F\u5F88\u7406\u89E3\u3002\u201D\u4E09\u59B9\u611F\u5230\u5F88\u56F0\u60D1\u3002</p><p>\u201C\u6211\u6765\u4E3E\u4E2A\u4E0D\u6070\u5F53\u53C8\u5F88\u6070\u5F53\u7684\u4F8B\u5B50\uFF0C\u4E00\u770B\u4F60\u5C31\u660E\u767D\u4E86\uFF0C\u4E09\u59B9\u3002\u201D</p><p>\u6709\u4E00\u5BF9\u53CC\u80DE\u80CE\uFF0C\u59D0\u59D0\u53EB\u963F\u4E3D\u5854\uFF0C\u59B9\u59B9\u53EB\u6D1B\u4E3D\u5854\u3002\u6211\u4EEC\u666E\u901A\u4EBA\u53EF\u80FD\u5B8C\u5168\u65E0\u6CD5\u5206\u8FA8\u8C01\u662F\u59D0\u59D0\u8C01\u662F\u59B9\u59B9\uFF0C\u53EF\u5979\u4EEC\u7684\u5988\u5988\u5374\u53EF\u4EE5\u8F7B\u800C\u6613\u4E3E\u5730\u8FA8\u8BA4\u51FA\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/string/equals-01.png" alt=""></p><p><code>.equals()</code> \u5C31\u597D\u50CF\u6211\u4EEC\u666E\u901A\u4EBA\uFF0C\u770B\u89C1\u963F\u4E3D\u5854\u4EE5\u4E3A\u662F\u6D1B\u4E3D\u5854\uFF0C\u770B\u89C1\u6D1B\u4E3D\u5854\u4EE5\u4E3A\u662F\u963F\u4E3D\u5854\uFF0C\u770B\u8D77\u6765\u4E00\u6837\u5C31\u89C9\u5F97\u5979\u4EEC\u662F\u540C\u4E00\u4E2A\u4EBA\uFF1B\u201C==\u201D\u64CD\u4F5C\u7B26\u5C31\u597D\u50CF\u5979\u4EEC\u7684\u5988\u5988\uFF0C\u8981\u6C42\u66F4\u4E25\u683C\uFF0C\u89C2\u5BDF\u66F4\u7EC6\u81F4\uFF0C\u4E00\u773C\u5C31\u80FD\u5206\u8FA8\u51FA\u8C01\u662F\u59D0\u59D0\u8C01\u662F\u59B9\u59B9\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">String</span> alita <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">String</span><span class="token punctuation">(</span><span class="token string">&quot;\u5C0F\u841D\u8389&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 <span class="token class-name">String</span> luolita <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">String</span><span class="token punctuation">(</span><span class="token string">&quot;\u5C0F\u841D\u8389&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 
 <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span>alita<span class="token punctuation">.</span><span class="token function">equals</span><span class="token punctuation">(</span>luolita<span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// true</span>
diff --git a/dist/assets/fail-fast.html.613c56f6.js b/dist/assets/fail-fast.html.dca676b6.js
similarity index 99%
rename from dist/assets/fail-fast.html.613c56f6.js
rename to dist/assets/fail-fast.html.dca676b6.js
index e593fc34..bca5b044 100644
--- a/dist/assets/fail-fast.html.613c56f6.js
+++ b/dist/assets/fail-fast.html.dca676b6.js
@@ -1,4 +1,4 @@
-import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e as t}from"./app.a0271b9c.js";const p={},e=t(`<h1 id="\u4E3A\u4EC0\u4E48\u963F\u91CC\u5DF4\u5DF4\u5F3A\u5236\u4E0D\u8981\u5728foreach\u91CC\u6267\u884C\u5220\u9664\u64CD\u4F5C" tabindex="-1"><a class="header-anchor" href="#\u4E3A\u4EC0\u4E48\u963F\u91CC\u5DF4\u5DF4\u5F3A\u5236\u4E0D\u8981\u5728foreach\u91CC\u6267\u884C\u5220\u9664\u64CD\u4F5C" aria-hidden="true">#</a> \u4E3A\u4EC0\u4E48\u963F\u91CC\u5DF4\u5DF4\u5F3A\u5236\u4E0D\u8981\u5728foreach\u91CC\u6267\u884C\u5220\u9664\u64CD\u4F5C</h1><p>\u90A3\u5929\uFF0C\u5C0F\u4E8C\u53BB\u963F\u91CC\u9762\u8BD5\uFF0C\u9762\u8BD5\u5B98\u8001\u738B\u4E00\u4E0A\u6765\u5C31\u7529\u7ED9\u4E86\u4ED6\u4E00\u9053\u9762\u8BD5\u9898\uFF1A\u4E3A\u4EC0\u4E48\u963F\u91CC\u7684 Java \u5F00\u53D1\u624B\u518C\u91CC\u4F1A\u5F3A\u5236\u4E0D\u8981\u5728 foreach \u91CC\u8FDB\u884C\u5143\u7D20\u7684\u5220\u9664\u64CD\u4F5C\uFF1F</p><hr><p>\u4E3A\u4E86\u9547\u697C\uFF0C\u5148\u642C\u4E00\u6BB5\u82F1\u6587\u6765\u89E3\u91CA\u4E00\u4E0B fail-fast\u3002</p><blockquote><p>In systems design, a fail-fast system is one which immediately reports at its interface any condition that is likely to indicate a failure. Fail-fast systems are usually designed to stop normal operation rather than attempt to continue a possibly flawed process. Such designs often check the system&#39;s state at several points in an operation, so any failures can be detected early. The responsibility of a fail-fast module is detecting errors, then letting the next-highest level of the system handle them.</p></blockquote><p>\u8FD9\u6BB5\u8BDD\u7684\u5927\u81F4\u610F\u601D\u5C31\u662F\uFF0Cfail-fast \u662F\u4E00\u79CD\u901A\u7528\u7684\u7CFB\u7EDF\u8BBE\u8BA1\u601D\u60F3\uFF0C\u4E00\u65E6\u68C0\u6D4B\u5230\u53EF\u80FD\u4F1A\u53D1\u751F\u9519\u8BEF\uFF0C\u5C31\u7ACB\u9A6C\u629B\u51FA\u5F02\u5E38\uFF0C\u7A0B\u5E8F\u5C06\u4E0D\u518D\u5F80\u4E0B\u6267\u884C\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">test</span><span class="token punctuation">(</span><span class="token class-name">Wanger</span> wanger<span class="token punctuation">)</span> <span class="token punctuation">{</span>   
+import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e as t}from"./app.615e41d8.js";const p={},e=t(`<h1 id="\u4E3A\u4EC0\u4E48\u963F\u91CC\u5DF4\u5DF4\u5F3A\u5236\u4E0D\u8981\u5728foreach\u91CC\u6267\u884C\u5220\u9664\u64CD\u4F5C" tabindex="-1"><a class="header-anchor" href="#\u4E3A\u4EC0\u4E48\u963F\u91CC\u5DF4\u5DF4\u5F3A\u5236\u4E0D\u8981\u5728foreach\u91CC\u6267\u884C\u5220\u9664\u64CD\u4F5C" aria-hidden="true">#</a> \u4E3A\u4EC0\u4E48\u963F\u91CC\u5DF4\u5DF4\u5F3A\u5236\u4E0D\u8981\u5728foreach\u91CC\u6267\u884C\u5220\u9664\u64CD\u4F5C</h1><p>\u90A3\u5929\uFF0C\u5C0F\u4E8C\u53BB\u963F\u91CC\u9762\u8BD5\uFF0C\u9762\u8BD5\u5B98\u8001\u738B\u4E00\u4E0A\u6765\u5C31\u7529\u7ED9\u4E86\u4ED6\u4E00\u9053\u9762\u8BD5\u9898\uFF1A\u4E3A\u4EC0\u4E48\u963F\u91CC\u7684 Java \u5F00\u53D1\u624B\u518C\u91CC\u4F1A\u5F3A\u5236\u4E0D\u8981\u5728 foreach \u91CC\u8FDB\u884C\u5143\u7D20\u7684\u5220\u9664\u64CD\u4F5C\uFF1F</p><hr><p>\u4E3A\u4E86\u9547\u697C\uFF0C\u5148\u642C\u4E00\u6BB5\u82F1\u6587\u6765\u89E3\u91CA\u4E00\u4E0B fail-fast\u3002</p><blockquote><p>In systems design, a fail-fast system is one which immediately reports at its interface any condition that is likely to indicate a failure. Fail-fast systems are usually designed to stop normal operation rather than attempt to continue a possibly flawed process. Such designs often check the system&#39;s state at several points in an operation, so any failures can be detected early. The responsibility of a fail-fast module is detecting errors, then letting the next-highest level of the system handle them.</p></blockquote><p>\u8FD9\u6BB5\u8BDD\u7684\u5927\u81F4\u610F\u601D\u5C31\u662F\uFF0Cfail-fast \u662F\u4E00\u79CD\u901A\u7528\u7684\u7CFB\u7EDF\u8BBE\u8BA1\u601D\u60F3\uFF0C\u4E00\u65E6\u68C0\u6D4B\u5230\u53EF\u80FD\u4F1A\u53D1\u751F\u9519\u8BEF\uFF0C\u5C31\u7ACB\u9A6C\u629B\u51FA\u5F02\u5E38\uFF0C\u7A0B\u5E8F\u5C06\u4E0D\u518D\u5F80\u4E0B\u6267\u884C\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">test</span><span class="token punctuation">(</span><span class="token class-name">Wanger</span> wanger<span class="token punctuation">)</span> <span class="token punctuation">{</span>   
     <span class="token keyword">if</span> <span class="token punctuation">(</span>wanger <span class="token operator">==</span> <span class="token keyword">null</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
         <span class="token keyword">throw</span> <span class="token keyword">new</span> <span class="token class-name">RuntimeException</span><span class="token punctuation">(</span><span class="token string">&quot;wanger \u4E0D\u80FD\u4E3A\u7A7A&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
     <span class="token punctuation">}</span>
diff --git a/dist/assets/fanshe.html.c9e51464.js b/dist/assets/fanshe.html.e42ba18d.js
similarity index 99%
rename from dist/assets/fanshe.html.c9e51464.js
rename to dist/assets/fanshe.html.e42ba18d.js
index f3850f60..0575d4c8 100644
--- a/dist/assets/fanshe.html.c9e51464.js
+++ b/dist/assets/fanshe.html.e42ba18d.js
@@ -1,4 +1,4 @@
-import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e as t}from"./app.a0271b9c.js";const p={},e=t(`<h1 id="\u5927\u767D\u8BDD\u8BF4java\u53CD\u5C04-\u5165\u95E8\u3001\u4F7F\u7528\u3001\u539F\u7406" tabindex="-1"><a class="header-anchor" href="#\u5927\u767D\u8BDD\u8BF4java\u53CD\u5C04-\u5165\u95E8\u3001\u4F7F\u7528\u3001\u539F\u7406" aria-hidden="true">#</a> \u5927\u767D\u8BDD\u8BF4Java\u53CD\u5C04\uFF1A\u5165\u95E8\u3001\u4F7F\u7528\u3001\u539F\u7406</h1><p>\u201C\u4E8C\u54E5\uFF0C\u4EC0\u4E48\u662F\u53CD\u5C04\u5440\uFF1F\u201D\u4E09\u59B9\u5F00\u95E8\u89C1\u5C71\u5730\u95EE\u3002</p><p>\u201C\u8981\u60F3\u77E5\u9053\u4EC0\u4E48\u662F\u53CD\u5C04\uFF0C\u5C31\u9700\u8981\u5148\u6765\u4E86\u89E3\u4EC0\u4E48\u662F\u2018\u6B63\u5C04\u2019\u3002\u201D\u6211\u7B11\u7740\u5BF9\u4E09\u59B9\u8BF4\uFF0C\u201C\u4E00\u822C\u60C5\u51B5\u4E0B\uFF0C\u6211\u4EEC\u5728\u4F7F\u7528\u67D0\u4E2A\u7C7B\u4E4B\u524D\u5DF2\u7ECF\u786E\u5B9A\u5B83\u5230\u5E95\u662F\u4E2A\u4EC0\u4E48\u7C7B\u4E86\uFF0C\u62FF\u5230\u624B\u5C31\u76F4\u63A5\u53EF\u4EE5\u4F7F\u7528 <code>new</code> \u5173\u952E\u5B57\u6765\u8C03\u7528\u6784\u9020\u65B9\u6CD5\u8FDB\u884C\u521D\u59CB\u5316\uFF0C\u4E4B\u540E\u4F7F\u7528\u8FD9\u4E2A\u7C7B\u7684\u5BF9\u8C61\u6765\u8FDB\u884C\u64CD\u4F5C\u3002\u201D</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">Writer</span> writer <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">Writer</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
+import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e as t}from"./app.615e41d8.js";const p={},e=t(`<h1 id="\u5927\u767D\u8BDD\u8BF4java\u53CD\u5C04-\u5165\u95E8\u3001\u4F7F\u7528\u3001\u539F\u7406" tabindex="-1"><a class="header-anchor" href="#\u5927\u767D\u8BDD\u8BF4java\u53CD\u5C04-\u5165\u95E8\u3001\u4F7F\u7528\u3001\u539F\u7406" aria-hidden="true">#</a> \u5927\u767D\u8BDD\u8BF4Java\u53CD\u5C04\uFF1A\u5165\u95E8\u3001\u4F7F\u7528\u3001\u539F\u7406</h1><p>\u201C\u4E8C\u54E5\uFF0C\u4EC0\u4E48\u662F\u53CD\u5C04\u5440\uFF1F\u201D\u4E09\u59B9\u5F00\u95E8\u89C1\u5C71\u5730\u95EE\u3002</p><p>\u201C\u8981\u60F3\u77E5\u9053\u4EC0\u4E48\u662F\u53CD\u5C04\uFF0C\u5C31\u9700\u8981\u5148\u6765\u4E86\u89E3\u4EC0\u4E48\u662F\u2018\u6B63\u5C04\u2019\u3002\u201D\u6211\u7B11\u7740\u5BF9\u4E09\u59B9\u8BF4\uFF0C\u201C\u4E00\u822C\u60C5\u51B5\u4E0B\uFF0C\u6211\u4EEC\u5728\u4F7F\u7528\u67D0\u4E2A\u7C7B\u4E4B\u524D\u5DF2\u7ECF\u786E\u5B9A\u5B83\u5230\u5E95\u662F\u4E2A\u4EC0\u4E48\u7C7B\u4E86\uFF0C\u62FF\u5230\u624B\u5C31\u76F4\u63A5\u53EF\u4EE5\u4F7F\u7528 <code>new</code> \u5173\u952E\u5B57\u6765\u8C03\u7528\u6784\u9020\u65B9\u6CD5\u8FDB\u884C\u521D\u59CB\u5316\uFF0C\u4E4B\u540E\u4F7F\u7528\u8FD9\u4E2A\u7C7B\u7684\u5BF9\u8C61\u6765\u8FDB\u884C\u64CD\u4F5C\u3002\u201D</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">Writer</span> writer <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">Writer</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 writer<span class="token punctuation">.</span><span class="token function">setName</span><span class="token punctuation">(</span><span class="token string">&quot;\u6C89\u9ED8\u738B\u4E8C&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><p>\u50CF\u4E0A\u9762\u8FD9\u4E2A\u4F8B\u5B50\uFF0C\u5C31\u53EF\u4EE5\u7406\u89E3\u4E3A\u201C\u6B63\u5C04\u201D\u3002\u800C\u53CD\u5C04\u5C31\u610F\u5473\u7740\u4E00\u5F00\u59CB\u6211\u4EEC\u4E0D\u77E5\u9053\u8981\u521D\u59CB\u5316\u7684\u7C7B\u5230\u5E95\u662F\u4EC0\u4E48\uFF0C\u4E5F\u5C31\u6CA1\u6CD5\u76F4\u63A5\u4F7F\u7528 <code>new</code> \u5173\u952E\u5B57\u521B\u5EFA\u5BF9\u8C61\u4E86\u3002</p><p>\u6211\u4EEC\u53EA\u77E5\u9053\u8FD9\u4E2A\u7C7B\u7684\u4E00\u4E9B\u57FA\u672C\u4FE1\u606F\uFF0C\u5C31\u597D\u50CF\u6211\u4EEC\u770B\u7535\u5F71\u7684\u65F6\u5019\uFF0C\u4E3A\u4E86\u6293\u4F4F\u4E00\u4E2A\u72AF\u7F6A\u5ACC\u7591\u4EBA\uFF0C\u8B66\u5BDF\u5C31\u4F1A\u95EE\u4E00\u4E9B\u76EE\u51FB\u8BC1\u4EBA\uFF0C\u6839\u636E\u8FD9\u4E9B\u8BC1\u4EBA\u63D0\u4F9B\u7684\u4FE1\u606F\uFF0C\u627E\u4E13\u5BB6\u628A\u72AF\u7F6A\u5ACC\u7591\u4EBA\u7684\u6837\u8C8C\u7ED9\u753B\u51FA\u6765\u2014\u2014\u8FD9\u4E2A\u8FC7\u7A0B\uFF0C\u5C31\u53EF\u4EE5\u79F0\u4E4B\u4E3A<strong>\u53CD\u5C04</strong>\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">Class</span> clazz <span class="token operator">=</span> <span class="token class-name">Class</span><span class="token punctuation">.</span><span class="token function">forName</span><span class="token punctuation">(</span><span class="token string">&quot;com.itwanger.s39.Writer&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 <span class="token class-name">Method</span> method <span class="token operator">=</span> clazz<span class="token punctuation">.</span><span class="token function">getMethod</span><span class="token punctuation">(</span><span class="token string">&quot;setName&quot;</span><span class="token punctuation">,</span> <span class="token class-name">String</span><span class="token punctuation">.</span><span class="token keyword">class</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
diff --git a/dist/assets/fastjson.html.ac85dfcc.js b/dist/assets/fastjson.html.bf5a0ad8.js
similarity index 99%
rename from dist/assets/fastjson.html.ac85dfcc.js
rename to dist/assets/fastjson.html.bf5a0ad8.js
index 081b65d6..19dcead2 100644
--- a/dist/assets/fastjson.html.ac85dfcc.js
+++ b/dist/assets/fastjson.html.bf5a0ad8.js
@@ -1,4 +1,4 @@
-import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e}from"./app.a0271b9c.js";const t={},p=e(`<h3 id="_01\u3001\u524D\u4E16\u4ECA\u751F" tabindex="-1"><a class="header-anchor" href="#_01\u3001\u524D\u4E16\u4ECA\u751F" aria-hidden="true">#</a> 01\u3001\u524D\u4E16\u4ECA\u751F</h3><p>\u6211\u662F fastjson\uFF0C\u662F\u4E2A\u5730\u5730\u9053\u9053\u7684\u676D\u5DDE\u571F\u8457\uFF0C\u4F46\u6211\u59CB\u7EC8\u6000\u63E3\u7740\u4E00\u9897\u8D70\u5411\u5168\u4E16\u754C\u7684\u96C4\u5FC3\u3002\u8FD9\u4E0D\uFF0C\u6211\u5728 GitHub \u4E0A\u7684\u7B80\u4ECB\u90FD\u6362\u6210\u4E86\u82F1\u6587\uFF0C\u56FD\u9645\u8303\u5341\u8DB3\u5427\uFF1F</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/fastjson-0576767f-c447-49f1-83a3-6971782c4d52.png" alt=""></p><p>\u5982\u679C\u4F60\u7684\u82F1\u8BED\u529F\u5E95\u6CA1\u6709\u6211\u5BB6\u8001\u677F 666 \u7684\u8BDD\uFF0C\u6211\u53EF\u4EE5\u7B80\u5355\u5730\u7FFB\u8BD1\u4E0B\uFF08\u8BF4\u4EBA\u8BDD\uFF0C\u4E0D\u88C5\u903C\uFF09\u3002</p><p>\u6211\u662F\u963F\u91CC\u5DF4\u5DF4\u5F00\u6E90\u7684\u4E00\u6B3E JSON \u89E3\u6790\u5E93\uFF0C\u53EF\u4EE5\u5C06 Java \u5BF9\u8C61\u5E8F\u5217\u5316\u6210 JSON \u5B57\u7B26\u4E32\uFF0C\u540C\u65F6\u4E5F\u53EF\u4EE5\u5C06 JSON \u5B57\u7B26\u4E32\u53CD\u5E8F\u5217\u5316\u4E3A Java \u5BF9\u8C61\u3002</p><ul><li><p>\u6211\u63D0\u4F9B\u4E86\u670D\u52A1\u5668\u7AEF\u548C\u5B89\u5353\u5BA2\u6237\u7AEF\u4E24\u79CD\u89E3\u6790\u5DE5\u5177\uFF0C\u6027\u80FD\u8868\u73B0\u8FD8\u4E0D\u9519\u3002</p></li><li><p>\u6211\u63D0\u4F9B\u4E86\u4FBF\u6377\u7684\u65B9\u5F0F\u6765\u8FDB\u884C Java \u5BF9\u8C61\u548C JSON \u4E4B\u95F4\u7684\u4E92\u8F6C\uFF0C<code>toJSONString()</code> \u65B9\u6CD5\u7528\u6765\u5E8F\u5217\u5316\uFF0C<code>parseObject()</code> \u65B9\u6CD5\u7528\u6765\u53CD\u5E8F\u5217\u5316\u3002</p></li><li><p>\u6211\u5141\u8BB8\u8F6C\u6362\u9884\u5148\u5B58\u5728\u7684\u65E0\u6CD5\u4FEE\u6539\u7684\u5BF9\u8C61\uFF08\u53EA\u6709 class\u3001\u6CA1\u6709\u6E90\u4EE3\u7801\uFF09\u3002</p></li><li><p>\u5BF9 Java \u6CDB\u578B\u6709\u7740\u5E7F\u6CDB\u7684\u652F\u6301\u3002</p></li><li><p>\u6211\u652F\u6301\u4EFB\u610F\u590D\u6742\u7684\u5BF9\u8C61\uFF08\u6DF1\u5EA6\u7684\u7EE7\u627F\u5C42\u6B21\uFF09\u3002</p></li></ul><p>2012 \u5E74\u7684\u65F6\u5019\uFF0C\u6211\u5C31\u88AB\u5F00\u6E90\u4E2D\u56FD\u8BC4\u9009\u4E3A\u6700\u53D7\u6B22\u8FCE\u7684\u56FD\u4EA7\u5F00\u6E90\u8F6F\u4EF6\u4E4B\u4E00\u3002\u65F6\u9694\u591A\u5E74\uFF0C\u6211\u7684\u6D41\u884C\u8D8B\u52BF\u6CA1\u6709\u4E1D\u6BEB\u51CF\u9000\uFF0C\u5728 JSON \u9886\u57DF\uFF0C\u6211\u6562\u8BF4\u6211\u662F NO 1\uFF0C\u56E0\u4E3A\u6211\u5728 GitHub \u4E0A\u7684\u7C89\u4E1D\u6570\u5DF2\u7ECF\u8D85\u8FC7\u4E86 22k\uFF0C\u6CA1\u6709\u4EFB\u4F55\u4EBA\u6562\u5FFD\u89C6\u6211\u8FD9\u6837\u7684\u6210\u5C31\u3002</p><h3 id="_02\u3001\u4F7F\u7528\u6307\u5357" tabindex="-1"><a class="header-anchor" href="#_02\u3001\u4F7F\u7528\u6307\u5357" aria-hidden="true">#</a> 02\u3001\u4F7F\u7528\u6307\u5357</h3><p>\u5728\u4F7F\u7528\u6211\u7684 API \u4E4B\u524D\uFF0C\u9700\u8981\u5148\u5728 pom.xml \u6587\u4EF6\u4E2D\u5F15\u5165\u6211\u7684\u4F9D\u8D56\u3002</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
+import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e}from"./app.615e41d8.js";const t={},p=e(`<h3 id="_01\u3001\u524D\u4E16\u4ECA\u751F" tabindex="-1"><a class="header-anchor" href="#_01\u3001\u524D\u4E16\u4ECA\u751F" aria-hidden="true">#</a> 01\u3001\u524D\u4E16\u4ECA\u751F</h3><p>\u6211\u662F fastjson\uFF0C\u662F\u4E2A\u5730\u5730\u9053\u9053\u7684\u676D\u5DDE\u571F\u8457\uFF0C\u4F46\u6211\u59CB\u7EC8\u6000\u63E3\u7740\u4E00\u9897\u8D70\u5411\u5168\u4E16\u754C\u7684\u96C4\u5FC3\u3002\u8FD9\u4E0D\uFF0C\u6211\u5728 GitHub \u4E0A\u7684\u7B80\u4ECB\u90FD\u6362\u6210\u4E86\u82F1\u6587\uFF0C\u56FD\u9645\u8303\u5341\u8DB3\u5427\uFF1F</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/fastjson-0576767f-c447-49f1-83a3-6971782c4d52.png" alt=""></p><p>\u5982\u679C\u4F60\u7684\u82F1\u8BED\u529F\u5E95\u6CA1\u6709\u6211\u5BB6\u8001\u677F 666 \u7684\u8BDD\uFF0C\u6211\u53EF\u4EE5\u7B80\u5355\u5730\u7FFB\u8BD1\u4E0B\uFF08\u8BF4\u4EBA\u8BDD\uFF0C\u4E0D\u88C5\u903C\uFF09\u3002</p><p>\u6211\u662F\u963F\u91CC\u5DF4\u5DF4\u5F00\u6E90\u7684\u4E00\u6B3E JSON \u89E3\u6790\u5E93\uFF0C\u53EF\u4EE5\u5C06 Java \u5BF9\u8C61\u5E8F\u5217\u5316\u6210 JSON \u5B57\u7B26\u4E32\uFF0C\u540C\u65F6\u4E5F\u53EF\u4EE5\u5C06 JSON \u5B57\u7B26\u4E32\u53CD\u5E8F\u5217\u5316\u4E3A Java \u5BF9\u8C61\u3002</p><ul><li><p>\u6211\u63D0\u4F9B\u4E86\u670D\u52A1\u5668\u7AEF\u548C\u5B89\u5353\u5BA2\u6237\u7AEF\u4E24\u79CD\u89E3\u6790\u5DE5\u5177\uFF0C\u6027\u80FD\u8868\u73B0\u8FD8\u4E0D\u9519\u3002</p></li><li><p>\u6211\u63D0\u4F9B\u4E86\u4FBF\u6377\u7684\u65B9\u5F0F\u6765\u8FDB\u884C Java \u5BF9\u8C61\u548C JSON \u4E4B\u95F4\u7684\u4E92\u8F6C\uFF0C<code>toJSONString()</code> \u65B9\u6CD5\u7528\u6765\u5E8F\u5217\u5316\uFF0C<code>parseObject()</code> \u65B9\u6CD5\u7528\u6765\u53CD\u5E8F\u5217\u5316\u3002</p></li><li><p>\u6211\u5141\u8BB8\u8F6C\u6362\u9884\u5148\u5B58\u5728\u7684\u65E0\u6CD5\u4FEE\u6539\u7684\u5BF9\u8C61\uFF08\u53EA\u6709 class\u3001\u6CA1\u6709\u6E90\u4EE3\u7801\uFF09\u3002</p></li><li><p>\u5BF9 Java \u6CDB\u578B\u6709\u7740\u5E7F\u6CDB\u7684\u652F\u6301\u3002</p></li><li><p>\u6211\u652F\u6301\u4EFB\u610F\u590D\u6742\u7684\u5BF9\u8C61\uFF08\u6DF1\u5EA6\u7684\u7EE7\u627F\u5C42\u6B21\uFF09\u3002</p></li></ul><p>2012 \u5E74\u7684\u65F6\u5019\uFF0C\u6211\u5C31\u88AB\u5F00\u6E90\u4E2D\u56FD\u8BC4\u9009\u4E3A\u6700\u53D7\u6B22\u8FCE\u7684\u56FD\u4EA7\u5F00\u6E90\u8F6F\u4EF6\u4E4B\u4E00\u3002\u65F6\u9694\u591A\u5E74\uFF0C\u6211\u7684\u6D41\u884C\u8D8B\u52BF\u6CA1\u6709\u4E1D\u6BEB\u51CF\u9000\uFF0C\u5728 JSON \u9886\u57DF\uFF0C\u6211\u6562\u8BF4\u6211\u662F NO 1\uFF0C\u56E0\u4E3A\u6211\u5728 GitHub \u4E0A\u7684\u7C89\u4E1D\u6570\u5DF2\u7ECF\u8D85\u8FC7\u4E86 22k\uFF0C\u6CA1\u6709\u4EFB\u4F55\u4EBA\u6562\u5FFD\u89C6\u6211\u8FD9\u6837\u7684\u6210\u5C31\u3002</p><h3 id="_02\u3001\u4F7F\u7528\u6307\u5357" tabindex="-1"><a class="header-anchor" href="#_02\u3001\u4F7F\u7528\u6307\u5357" aria-hidden="true">#</a> 02\u3001\u4F7F\u7528\u6307\u5357</h3><p>\u5728\u4F7F\u7528\u6211\u7684 API \u4E4B\u524D\uFF0C\u9700\u8981\u5148\u5728 pom.xml \u6587\u4EF6\u4E2D\u5F15\u5165\u6211\u7684\u4F9D\u8D56\u3002</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
     &lt;groupId&gt;com.alibaba&lt;/groupId&gt;
     &lt;artifactId&gt;fastjson&lt;/artifactId&gt;
     &lt;version&gt;1.2.58&lt;/version&gt;
diff --git a/dist/assets/final.html.de436e22.js b/dist/assets/final.html.e625665e.js
similarity index 99%
rename from dist/assets/final.html.de436e22.js
rename to dist/assets/final.html.e625665e.js
index a45cbf94..1b190c15 100644
--- a/dist/assets/final.html.de436e22.js
+++ b/dist/assets/final.html.e625665e.js
@@ -1,4 +1,4 @@
-import{_ as t}from"./plugin-vue_export-helper.21dcd24c.js";import{r as l,o as c,c as i,a as n,b as s,e,d as p}from"./app.a0271b9c.js";const o={},u=e(`<h1 id="\u6D45\u6790java\u4E2D\u7684final\u5173\u952E\u5B57" tabindex="-1"><a class="header-anchor" href="#\u6D45\u6790java\u4E2D\u7684final\u5173\u952E\u5B57" aria-hidden="true">#</a> \u6D45\u6790Java\u4E2D\u7684final\u5173\u952E\u5B57</h1><p>\u201C\u54E5\uFF0C\u4ECA\u5929\u5B66\u4EC0\u4E48\u5462\uFF1F\u201D</p><p>\u201C\u4ECA\u5929\u5B66\u4E00\u4E2A\u91CD\u8981\u7684\u5173\u952E\u5B57\u2014\u2014final\u3002 \u201D\u6211\u9762\u5E26\u7740\u6734\u5B9E\u65E0\u534E\u7684\u5FAE\u7B11\u56DE\u7B54\u7740\u5979\uFF0C\u201C\u5BF9\u4E86\uFF0C\u4E09\u59B9\uFF0C\u4F60\u6253\u7B97\u8003\u7814\u5417\uFF1F\u201D</p><p>\u201C\u8FD8\u6CA1\u60F3\u8FC7\uFF0C\u6211\u4ECA\u5E74\u624D\u5927\u4E00\u5462\uFF0C\u5230\u65F6\u5019\u518D\u8BF4\u5427\uFF0C\u4F60\u51B3\u5B9A\u3002\u201D</p><p>\u201C\u597D\u5427\u3002\u201D\u6211\u644A\u644A\u624B\uFF0C\u8868\u793A\u5F88\u65E0\u8F9C\uFF0C\u771F\u7684\u662F\u6240\u6709\u7684\u51B3\u5B9A\u90FD\u4EA4\u7ED9\u6211\u8FD9\u4E2A\u54E5\u54E5\u4E86\uFF0C\u5982\u679C\u51B3\u5B9A\u9519\u4E86\uFF0C\u9505\u5F97\u80CC\u4E0A\u3002</p><h3 id="_01\u3001final-\u53D8\u91CF" tabindex="-1"><a class="header-anchor" href="#_01\u3001final-\u53D8\u91CF" aria-hidden="true">#</a> 01\u3001final \u53D8\u91CF</h3><p>\u201C\u597D\u4E86\uFF0C\u6211\u4EEC\u5148\u6765\u770B final \u4FEE\u9970\u7684\u53D8\u91CF\u5427\uFF01\u201D</p><p>\u201C\u88AB final \u4FEE\u9970\u7684\u53D8\u91CF\u65E0\u6CD5\u91CD\u65B0\u8D4B\u503C\u3002\u6362\u53E5\u8BDD\u8BF4\uFF0Cfinal \u53D8\u91CF\u4E00\u65E6\u521D\u59CB\u5316\uFF0C\u5C31\u65E0\u6CD5\u66F4\u6539\u3002\u201D</p><p>\u201C\u6765\u770B\u8FD9\u884C\u4EE3\u7801\u3002\u201D</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">final</span> <span class="token keyword">int</span> age <span class="token operator">=</span> <span class="token number">18</span><span class="token punctuation">;</span>
+import{_ as t}from"./plugin-vue_export-helper.21dcd24c.js";import{r as l,o as c,c as i,a as n,b as s,e,d as p}from"./app.615e41d8.js";const o={},u=e(`<h1 id="\u6D45\u6790java\u4E2D\u7684final\u5173\u952E\u5B57" tabindex="-1"><a class="header-anchor" href="#\u6D45\u6790java\u4E2D\u7684final\u5173\u952E\u5B57" aria-hidden="true">#</a> \u6D45\u6790Java\u4E2D\u7684final\u5173\u952E\u5B57</h1><p>\u201C\u54E5\uFF0C\u4ECA\u5929\u5B66\u4EC0\u4E48\u5462\uFF1F\u201D</p><p>\u201C\u4ECA\u5929\u5B66\u4E00\u4E2A\u91CD\u8981\u7684\u5173\u952E\u5B57\u2014\u2014final\u3002 \u201D\u6211\u9762\u5E26\u7740\u6734\u5B9E\u65E0\u534E\u7684\u5FAE\u7B11\u56DE\u7B54\u7740\u5979\uFF0C\u201C\u5BF9\u4E86\uFF0C\u4E09\u59B9\uFF0C\u4F60\u6253\u7B97\u8003\u7814\u5417\uFF1F\u201D</p><p>\u201C\u8FD8\u6CA1\u60F3\u8FC7\uFF0C\u6211\u4ECA\u5E74\u624D\u5927\u4E00\u5462\uFF0C\u5230\u65F6\u5019\u518D\u8BF4\u5427\uFF0C\u4F60\u51B3\u5B9A\u3002\u201D</p><p>\u201C\u597D\u5427\u3002\u201D\u6211\u644A\u644A\u624B\uFF0C\u8868\u793A\u5F88\u65E0\u8F9C\uFF0C\u771F\u7684\u662F\u6240\u6709\u7684\u51B3\u5B9A\u90FD\u4EA4\u7ED9\u6211\u8FD9\u4E2A\u54E5\u54E5\u4E86\uFF0C\u5982\u679C\u51B3\u5B9A\u9519\u4E86\uFF0C\u9505\u5F97\u80CC\u4E0A\u3002</p><h3 id="_01\u3001final-\u53D8\u91CF" tabindex="-1"><a class="header-anchor" href="#_01\u3001final-\u53D8\u91CF" aria-hidden="true">#</a> 01\u3001final \u53D8\u91CF</h3><p>\u201C\u597D\u4E86\uFF0C\u6211\u4EEC\u5148\u6765\u770B final \u4FEE\u9970\u7684\u53D8\u91CF\u5427\uFF01\u201D</p><p>\u201C\u88AB final \u4FEE\u9970\u7684\u53D8\u91CF\u65E0\u6CD5\u91CD\u65B0\u8D4B\u503C\u3002\u6362\u53E5\u8BDD\u8BF4\uFF0Cfinal \u53D8\u91CF\u4E00\u65E6\u521D\u59CB\u5316\uFF0C\u5C31\u65E0\u6CD5\u66F4\u6539\u3002\u201D</p><p>\u201C\u6765\u770B\u8FD9\u884C\u4EE3\u7801\u3002\u201D</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">final</span> <span class="token keyword">int</span> age <span class="token operator">=</span> <span class="token number">18</span><span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>\u201C\u5F53\u5C1D\u8BD5\u5C06 age \u7684\u503C\u4FEE\u6539\u4E3A 30 \u7684\u65F6\u5019\uFF0C\u7F16\u8BD1\u5668\u5C31\u751F\u6C14\u4E86\u3002\u201D</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/keywords/23-01.png" alt=""></p><p>\u201C\u518D\u6765\u770B\u8FD9\u6BB5\u4EE3\u7801\u3002\u201D</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">Pig</span> <span class="token punctuation">{</span>
    <span class="token keyword">private</span> <span class="token class-name">String</span> name<span class="token punctuation">;</span>
 
diff --git a/dist/assets/flow-control.html.1f719486.js b/dist/assets/flow-control.html.5046ff0c.js
similarity index 99%
rename from dist/assets/flow-control.html.1f719486.js
rename to dist/assets/flow-control.html.5046ff0c.js
index e9638906..6771f8ca 100644
--- a/dist/assets/flow-control.html.1f719486.js
+++ b/dist/assets/flow-control.html.5046ff0c.js
@@ -1,4 +1,4 @@
-import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e}from"./app.a0271b9c.js";const p={},t=e(`<h1 id="java\u6D41\u7A0B\u63A7\u5236\u8BED\u53E5" tabindex="-1"><a class="header-anchor" href="#java\u6D41\u7A0B\u63A7\u5236\u8BED\u53E5" aria-hidden="true">#</a> Java\u6D41\u7A0B\u63A7\u5236\u8BED\u53E5</h1><p>\u201C\u4E8C\u54E5\uFF0C\u6D41\u7A0B\u63A7\u5236\u8BED\u53E5\u90FD\u6709\u54EA\u4E9B\u5462\uFF1F\u201D\u4E09\u59B9\u7684\u8138\u4E0A\u6CDB\u7740\u751C\u751C\u7684\u7B11\u5BB9\uFF0C\u5979\u5F00\u59CB\u5BF9\u63A5\u4E0B\u6765\u8981\u5B66\u4E60\u7684\u5185\u5BB9\u5145\u6EE1\u671F\u5F85\u4E86\uFF0C\u8FD9\u6B63\u662F\u6211\u611F\u5230\u6B23\u6170\u7684\u5730\u65B9\u3002</p><p>\u201C\u6BD4\u5982\u8BF4 if-else\u3001switch\u3001for\u3001while\u3001do-while\u3001return\u3001break\u3001continue \u7B49\u7B49\uFF0C\u63A5\u4E0B\u6765\uFF0C\u6211\u4EEC\u4E00\u4E2A\u4E2A\u6765\u4E86\u89E3\u4E0B\u3002\u201D</p><h3 id="_01\u3001if-else-\u76F8\u5173" tabindex="-1"><a class="header-anchor" href="#_01\u3001if-else-\u76F8\u5173" aria-hidden="true">#</a> 01\u3001if-else \u76F8\u5173</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/control/thirteen-01.png" alt=""></p><p><strong>1\uFF09if \u8BED\u53E5</strong></p><p>if \u8BED\u53E5\u7684\u683C\u5F0F\u5982\u4E0B\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">if</span><span class="token punctuation">(</span>\u5E03\u5C14\u8868\u8FBE\u5F0F<span class="token punctuation">)</span><span class="token punctuation">{</span>  
+import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e}from"./app.615e41d8.js";const p={},t=e(`<h1 id="java\u6D41\u7A0B\u63A7\u5236\u8BED\u53E5" tabindex="-1"><a class="header-anchor" href="#java\u6D41\u7A0B\u63A7\u5236\u8BED\u53E5" aria-hidden="true">#</a> Java\u6D41\u7A0B\u63A7\u5236\u8BED\u53E5</h1><p>\u201C\u4E8C\u54E5\uFF0C\u6D41\u7A0B\u63A7\u5236\u8BED\u53E5\u90FD\u6709\u54EA\u4E9B\u5462\uFF1F\u201D\u4E09\u59B9\u7684\u8138\u4E0A\u6CDB\u7740\u751C\u751C\u7684\u7B11\u5BB9\uFF0C\u5979\u5F00\u59CB\u5BF9\u63A5\u4E0B\u6765\u8981\u5B66\u4E60\u7684\u5185\u5BB9\u5145\u6EE1\u671F\u5F85\u4E86\uFF0C\u8FD9\u6B63\u662F\u6211\u611F\u5230\u6B23\u6170\u7684\u5730\u65B9\u3002</p><p>\u201C\u6BD4\u5982\u8BF4 if-else\u3001switch\u3001for\u3001while\u3001do-while\u3001return\u3001break\u3001continue \u7B49\u7B49\uFF0C\u63A5\u4E0B\u6765\uFF0C\u6211\u4EEC\u4E00\u4E2A\u4E2A\u6765\u4E86\u89E3\u4E0B\u3002\u201D</p><h3 id="_01\u3001if-else-\u76F8\u5173" tabindex="-1"><a class="header-anchor" href="#_01\u3001if-else-\u76F8\u5173" aria-hidden="true">#</a> 01\u3001if-else \u76F8\u5173</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/control/thirteen-01.png" alt=""></p><p><strong>1\uFF09if \u8BED\u53E5</strong></p><p>if \u8BED\u53E5\u7684\u683C\u5F0F\u5982\u4E0B\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">if</span><span class="token punctuation">(</span>\u5E03\u5C14\u8868\u8FBE\u5F0F<span class="token punctuation">)</span><span class="token punctuation">{</span>  
 <span class="token comment">// \u5982\u679C\u6761\u4EF6\u4E3A true\uFF0C\u5219\u6267\u884C\u8FD9\u5757\u4EE3\u7801</span>
 <span class="token punctuation">}</span> 
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>\u753B\u4E2A\u6D41\u7A0B\u56FE\u8868\u793A\u4E00\u4E0B\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/control/thirteen-02.png" alt=""></p><p>\u6765\u5199\u4E2A\u793A\u4F8B\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">IfExample</span> <span class="token punctuation">{</span>
diff --git a/dist/assets/forest.html.18099f01.js b/dist/assets/forest.html.3141000b.js
similarity index 99%
rename from dist/assets/forest.html.18099f01.js
rename to dist/assets/forest.html.3141000b.js
index f4c3263e..1f707ec2 100644
--- a/dist/assets/forest.html.18099f01.js
+++ b/dist/assets/forest.html.3141000b.js
@@ -1,4 +1,4 @@
-import{_ as t}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o as e,c as o,a as n,b as c,e as s,d as l}from"./app.a0271b9c.js";const i={},u=s(`<p>\u5927\u5BB6\u597D\uFF0C\u6211\u662F\u4E8C\u54E5\u5440\uFF01\u4ECA\u5929\u6765\u7ED9\u5927\u5BB6\u63A8\u8350\u4E00\u6B3E\u76F4\u51FB\u75DB\u70B9\u7684 HTTP \u5BA2\u6237\u7AEF\u6846\u67B6\uFF0C\u53EF\u4EE5\u8D85\u9AD8\u6548\u7387\u5730\u5B8C\u6210\u548C\u7B2C\u4E09\u65B9\u63A5\u53E3\u7684\u5BF9\u63A5\u3002</p><p>\u5728\u4ECB\u7ECD\u672C\u7BC7\u7684\u4E3B\u89D2\u4E4B\u524D\uFF0C\u6211\u4EEC\u5148\u6765\u4E86\u89E3\u4E0B Java \u751F\u6001\u4E2D\u7684 HTTP \u7EC4\u4EF6\u5E93\uFF0C\u5927\u81F4\u53EF\u4EE5\u5206\u4E3A\u4E09\u7C7B\uFF1A</p><ul><li>JDK \u81EA\u5E26\u7684 HttpURLConnection \u6807\u51C6\u5E93\uFF1B</li><li>Apache HttpComponents HttpClient\uFF1B</li><li>OkHttp\u3002</li></ul><p>\u4F7F\u7528 HttpURLConnection \u53D1\u8D77 HTTP \u8BF7\u6C42\u6700\u5927\u7684\u4F18\u70B9\u662F\u4E0D\u9700\u8981\u5F15\u5165\u989D\u5916\u7684\u4F9D\u8D56\uFF0C\u4F46\u662F\u4F7F\u7528\u8D77\u6765\u975E\u5E38\u7E41\u7410\uFF0C\u4E5F\u7F3A\u4E4F\u8FDE\u63A5\u6C60\u7BA1\u7406\u3001\u57DF\u540D\u673A\u68B0\u63A7\u5236\u7B49\u7279\u6027\b\u652F\u6301\u3002</p><p>\u4F7F\u7528\u6807\u51C6\u5E93\u7684\u6700\u5927\u597D\u5904\u5C31\u662F\u4E0D\u9700\u8981\u5F15\u5165\u989D\u5916\u7684\u4F9D\u8D56\uFF0C\u4F46\u4F7F\u7528\u8D77\u6765\u6BD4\u8F83\u7E41\u7410\uFF0C\u5C31\u50CF\u76F4\u63A5\u4F7F\u7528 JDBC \u8FDE\u63A5\u6570\u636E\u5E93\u90A3\u6837\uFF0C\u9700\u8981\u5F88\u591A\u6A21\u677F\u4EE3\u7801\u3002\u6765\u53D1\u8D77\u4E00\u4E2A\u7B80\u5355\u7684 HTTP POST \u8BF7\u6C42\u5427\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">HttpUrlConnectionDemo</span> <span class="token punctuation">{</span>
+import{_ as t}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o as e,c as o,a as n,b as c,e as s,d as l}from"./app.615e41d8.js";const i={},u=s(`<p>\u5927\u5BB6\u597D\uFF0C\u6211\u662F\u4E8C\u54E5\u5440\uFF01\u4ECA\u5929\u6765\u7ED9\u5927\u5BB6\u63A8\u8350\u4E00\u6B3E\u76F4\u51FB\u75DB\u70B9\u7684 HTTP \u5BA2\u6237\u7AEF\u6846\u67B6\uFF0C\u53EF\u4EE5\u8D85\u9AD8\u6548\u7387\u5730\u5B8C\u6210\u548C\u7B2C\u4E09\u65B9\u63A5\u53E3\u7684\u5BF9\u63A5\u3002</p><p>\u5728\u4ECB\u7ECD\u672C\u7BC7\u7684\u4E3B\u89D2\u4E4B\u524D\uFF0C\u6211\u4EEC\u5148\u6765\u4E86\u89E3\u4E0B Java \u751F\u6001\u4E2D\u7684 HTTP \u7EC4\u4EF6\u5E93\uFF0C\u5927\u81F4\u53EF\u4EE5\u5206\u4E3A\u4E09\u7C7B\uFF1A</p><ul><li>JDK \u81EA\u5E26\u7684 HttpURLConnection \u6807\u51C6\u5E93\uFF1B</li><li>Apache HttpComponents HttpClient\uFF1B</li><li>OkHttp\u3002</li></ul><p>\u4F7F\u7528 HttpURLConnection \u53D1\u8D77 HTTP \u8BF7\u6C42\u6700\u5927\u7684\u4F18\u70B9\u662F\u4E0D\u9700\u8981\u5F15\u5165\u989D\u5916\u7684\u4F9D\u8D56\uFF0C\u4F46\u662F\u4F7F\u7528\u8D77\u6765\u975E\u5E38\u7E41\u7410\uFF0C\u4E5F\u7F3A\u4E4F\u8FDE\u63A5\u6C60\u7BA1\u7406\u3001\u57DF\u540D\u673A\u68B0\u63A7\u5236\u7B49\u7279\u6027\b\u652F\u6301\u3002</p><p>\u4F7F\u7528\u6807\u51C6\u5E93\u7684\u6700\u5927\u597D\u5904\u5C31\u662F\u4E0D\u9700\u8981\u5F15\u5165\u989D\u5916\u7684\u4F9D\u8D56\uFF0C\u4F46\u4F7F\u7528\u8D77\u6765\u6BD4\u8F83\u7E41\u7410\uFF0C\u5C31\u50CF\u76F4\u63A5\u4F7F\u7528 JDBC \u8FDE\u63A5\u6570\u636E\u5E93\u90A3\u6837\uFF0C\u9700\u8981\u5F88\u591A\u6A21\u677F\u4EE3\u7801\u3002\u6765\u53D1\u8D77\u4E00\u4E2A\u7B80\u5355\u7684 HTTP POST \u8BF7\u6C42\u5427\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">HttpUrlConnectionDemo</span> <span class="token punctuation">{</span>
     <span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">void</span> <span class="token function">main</span><span class="token punctuation">(</span><span class="token class-name">String</span><span class="token punctuation">[</span><span class="token punctuation">]</span> args<span class="token punctuation">)</span> <span class="token keyword">throws</span> <span class="token class-name">IOException</span> <span class="token punctuation">{</span>
         <span class="token class-name">String</span> urlString <span class="token operator">=</span> <span class="token string">&quot;https://httpbin.org/post&quot;</span><span class="token punctuation">;</span>
         <span class="token class-name">String</span> bodyString <span class="token operator">=</span> <span class="token string">&quot;password=123&quot;</span><span class="token punctuation">;</span>
diff --git a/dist/assets/fork-join.html.148dd105.js b/dist/assets/fork-join.html.e8674cdb.js
similarity index 99%
rename from dist/assets/fork-join.html.148dd105.js
rename to dist/assets/fork-join.html.e8674cdb.js
index e523582a..45e59aba 100644
--- a/dist/assets/fork-join.html.148dd105.js
+++ b/dist/assets/fork-join.html.e8674cdb.js
@@ -1,4 +1,4 @@
-import{_ as p}from"./plugin-vue_export-helper.21dcd24c.js";import{r as e,o,c,a as n,b as a,e as i,d as t}from"./app.a0271b9c.js";const l={},u=i(`<h2 id="\u4EC0\u4E48\u662Ffork-join" tabindex="-1"><a class="header-anchor" href="#\u4EC0\u4E48\u662Ffork-join" aria-hidden="true">#</a> \u4EC0\u4E48\u662FFork/Join</h2><p>Fork/Join\u6846\u67B6\u662F\u4E00\u4E2A\u5B9E\u73B0\u4E86ExecutorService\u63A5\u53E3\u7684\u591A\u7EBF\u7A0B\u5904\u7406\u5668\uFF0C\u5B83\u4E13\u4E3A\u90A3\u4E9B\u53EF\u4EE5\u901A\u8FC7\u9012\u5F52\u5206\u89E3\u6210\u66F4\u7EC6\u5C0F\u7684\u4EFB\u52A1\u800C\u8BBE\u8BA1\uFF0C\u6700\u5927\u5316\u7684\u5229\u7528\u591A\u6838\u5904\u7406\u5668\u6765\u63D0\u9AD8\u5E94\u7528\u7A0B\u5E8F\u7684\u6027\u80FD\u3002</p><p>\u4E0E\u5176\u4ED6ExecutorService\u76F8\u5173\u7684\u5B9E\u73B0\u76F8\u540C\u7684\u662F\uFF0CFork/Join\u6846\u67B6\u4F1A\u5C06\u4EFB\u52A1\u5206\u914D\u7ED9\u7EBF\u7A0B\u6C60\u4E2D\u7684\u7EBF\u7A0B\u3002\u800C\u4E0E\u4E4B\u4E0D\u540C\u7684\u662F\uFF0CFork/Join\u6846\u67B6\u5728\u6267\u884C\u4EFB\u52A1\u65F6\u4F7F\u7528\u4E86<strong>\u5DE5\u4F5C\u7A83\u53D6\u7B97\u6CD5</strong>\u3002</p><p><strong>fork</strong>\u5728\u82F1\u6587\u91CC\u6709\u5206\u53C9\u7684\u610F\u601D\uFF0C<strong>join</strong>\u5728\u82F1\u6587\u91CC\u8FDE\u63A5\u3001\u7ED3\u5408\u7684\u610F\u601D\u3002\u987E\u540D\u601D\u4E49\uFF0Cfork\u5C31\u662F\u8981\u4F7F\u4E00\u4E2A\u5927\u4EFB\u52A1\u5206\u89E3\u6210\u82E5\u5E72\u4E2A\u5C0F\u4EFB\u52A1\uFF0C\u800Cjoin\u5C31\u662F\u6700\u540E\u5C06\u5404\u4E2A\u5C0F\u4EFB\u52A1\u7684\u7ED3\u679C\u7ED3\u5408\u8D77\u6765\u5F97\u5230\u5927\u4EFB\u52A1\u7684\u7ED3\u679C\u3002</p><p>Fork/Join\u7684\u8FD0\u884C\u6D41\u7A0B\u5927\u81F4\u5982\u4E0B\u6240\u793A\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/fork-join-ba0c0e3f-dc9b-445d-874a-5878503a98f7.png" alt="fork/join\u6D41\u7A0B\u56FE"></p><p>\u9700\u8981\u6CE8\u610F\u7684\u662F\uFF0C\u56FE\u91CC\u7684\u6B21\u7EA7\u5B50\u4EFB\u52A1\u53EF\u4EE5\u4E00\u76F4\u5206\u4E0B\u53BB\uFF0C\u4E00\u76F4\u5206\u5230\u5B50\u4EFB\u52A1\u8DB3\u591F\u5C0F\u4E3A\u6B62\u3002\u7528\u4F2A\u4EE3\u7801\u6765\u8868\u793A\u5982\u4E0B\uFF1A</p><div class="language-pseudocode ext-pseudocode line-numbers-mode"><pre class="language-pseudocode"><code>solve(\u4EFB\u52A1):
+import{_ as p}from"./plugin-vue_export-helper.21dcd24c.js";import{r as e,o,c,a as n,b as a,e as i,d as t}from"./app.615e41d8.js";const l={},u=i(`<h2 id="\u4EC0\u4E48\u662Ffork-join" tabindex="-1"><a class="header-anchor" href="#\u4EC0\u4E48\u662Ffork-join" aria-hidden="true">#</a> \u4EC0\u4E48\u662FFork/Join</h2><p>Fork/Join\u6846\u67B6\u662F\u4E00\u4E2A\u5B9E\u73B0\u4E86ExecutorService\u63A5\u53E3\u7684\u591A\u7EBF\u7A0B\u5904\u7406\u5668\uFF0C\u5B83\u4E13\u4E3A\u90A3\u4E9B\u53EF\u4EE5\u901A\u8FC7\u9012\u5F52\u5206\u89E3\u6210\u66F4\u7EC6\u5C0F\u7684\u4EFB\u52A1\u800C\u8BBE\u8BA1\uFF0C\u6700\u5927\u5316\u7684\u5229\u7528\u591A\u6838\u5904\u7406\u5668\u6765\u63D0\u9AD8\u5E94\u7528\u7A0B\u5E8F\u7684\u6027\u80FD\u3002</p><p>\u4E0E\u5176\u4ED6ExecutorService\u76F8\u5173\u7684\u5B9E\u73B0\u76F8\u540C\u7684\u662F\uFF0CFork/Join\u6846\u67B6\u4F1A\u5C06\u4EFB\u52A1\u5206\u914D\u7ED9\u7EBF\u7A0B\u6C60\u4E2D\u7684\u7EBF\u7A0B\u3002\u800C\u4E0E\u4E4B\u4E0D\u540C\u7684\u662F\uFF0CFork/Join\u6846\u67B6\u5728\u6267\u884C\u4EFB\u52A1\u65F6\u4F7F\u7528\u4E86<strong>\u5DE5\u4F5C\u7A83\u53D6\u7B97\u6CD5</strong>\u3002</p><p><strong>fork</strong>\u5728\u82F1\u6587\u91CC\u6709\u5206\u53C9\u7684\u610F\u601D\uFF0C<strong>join</strong>\u5728\u82F1\u6587\u91CC\u8FDE\u63A5\u3001\u7ED3\u5408\u7684\u610F\u601D\u3002\u987E\u540D\u601D\u4E49\uFF0Cfork\u5C31\u662F\u8981\u4F7F\u4E00\u4E2A\u5927\u4EFB\u52A1\u5206\u89E3\u6210\u82E5\u5E72\u4E2A\u5C0F\u4EFB\u52A1\uFF0C\u800Cjoin\u5C31\u662F\u6700\u540E\u5C06\u5404\u4E2A\u5C0F\u4EFB\u52A1\u7684\u7ED3\u679C\u7ED3\u5408\u8D77\u6765\u5F97\u5230\u5927\u4EFB\u52A1\u7684\u7ED3\u679C\u3002</p><p>Fork/Join\u7684\u8FD0\u884C\u6D41\u7A0B\u5927\u81F4\u5982\u4E0B\u6240\u793A\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/fork-join-ba0c0e3f-dc9b-445d-874a-5878503a98f7.png" alt="fork/join\u6D41\u7A0B\u56FE"></p><p>\u9700\u8981\u6CE8\u610F\u7684\u662F\uFF0C\u56FE\u91CC\u7684\u6B21\u7EA7\u5B50\u4EFB\u52A1\u53EF\u4EE5\u4E00\u76F4\u5206\u4E0B\u53BB\uFF0C\u4E00\u76F4\u5206\u5230\u5B50\u4EFB\u52A1\u8DB3\u591F\u5C0F\u4E3A\u6B62\u3002\u7528\u4F2A\u4EE3\u7801\u6765\u8868\u793A\u5982\u4E0B\uFF1A</p><div class="language-pseudocode ext-pseudocode line-numbers-mode"><pre class="language-pseudocode"><code>solve(\u4EFB\u52A1):
     if(\u4EFB\u52A1\u5DF2\u7ECF\u5212\u5206\u5230\u8DB3\u591F\u5C0F):
         \u987A\u5E8F\u6267\u884C\u4EFB\u52A1
     else:
diff --git a/dist/assets/fumutuanju.html.d5b695cc.js b/dist/assets/fumutuanju.html.ca0f5d88.js
similarity index 99%
rename from dist/assets/fumutuanju.html.d5b695cc.js
rename to dist/assets/fumutuanju.html.ca0f5d88.js
index 77671901..79e564de 100644
--- a/dist/assets/fumutuanju.html.d5b695cc.js
+++ b/dist/assets/fumutuanju.html.ca0f5d88.js
@@ -1 +1 @@
-import{_ as t}from"./plugin-vue_export-helper.21dcd24c.js";import{o as e,c as p,e as a}from"./app.a0271b9c.js";const o={},r=a('<p>\u5927\u5BB6\u597D\uFF0C\u6211\u662F\u4E8C\u54E5\u5440\uFF01\u521A\u597D\u8D81\u7740\u5468\u672B\uFF0C\u5C31\u5E26\u8001\u5A46\u3001\u5973\u513F\u3001\u59B9\u59B9\u4E00\u8D77\u4ECE\u6D1B\u9633\u6765\u4E09\u95E8\u5CE1\u548C\u7236\u6BCD\u5C0F\u805A\u4E86\u4E00\u4E0B\u3002\u6D1B\u9633\u5230\u4E09\u95E8\u5CE1\u7684\u8DDD\u79BB\uFF0C\u5927\u6982\u5C31 11 \u4E2A\u5C0F\u65F6\u7684\u9A91\u884C\u65F6\u95F4\uFF0C\u5F00\u8F66\u5927\u6982 2 \u4E2A\u5C0F\u65F6\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/fumutuanju-1.png" alt=""></p><p>\u6211\u8001\u5BB6\u662F\u6D1B\u9633\u4E00\u4E2A\u5F88\u504F\u8FDC\u7684\u519C\u6751\uFF0C\u5904\u5728\u4E09\u95E8\u5CE1\u548C\u6D1B\u9633\u7684\u4EA4\u754C\u5904\uFF0C\u5C0F\u65F6\u5019\u770B\u7535\u89C6\uFF0C\u6536\u4E0D\u5230\u6211\u4EEC\u53BF\u57CE\u7684\u4FE1\u53F7\uFF0C\u53CD\u800C\u80FD\u6536\u5230\u9694\u58C1\u53BF\u57CE\u7684\uFF0C\u4E0D\u77E5\u9053\u6709\u591A\u5C11\u5C0F\u4F19\u4F34\u548C\u6211\u6709\u7C7B\u4F3C\u7684\u7ECF\u5386\u54C8\uFF1F</p><p>\u4E8E\u662F\u8FDB\u57CE\u52A1\u5DE5\u7684\u5927\u90E8\u5206\u6751\u6C11\u90FD\u4F1A\u9009\u62E9\u4E09\u95E8\u5CE1\u800C\u975E\u6D1B\u9633\uFF0C\u5176\u4E2D\u7684\u5F88\u5927\u4E00\u90E8\u5206\u539F\u56E0\u5C31\u662F\u56E0\u4E3A\u6211\u4EEC\u6751\u901A\u5F80\u4E09\u95E8\u5CE1\u7684\u5BA2\u8F66\u66F4\u65B9\u4FBF\uFF0C\u4E09\u95E8\u5CE1\u7684\u6D88\u8D39\u6C34\u5E73\u66F4\u4F4E\u4E00\u4E9B\u3002\u6211\u7236\u6BCD\u5C31\u662F\u8FD9\u90E8\u5206\u519C\u6C11\u5F53\u4E2D\u7684\u4E00\u4E2A\u7F29\u5F71\u3002</p><p>\u8FD9\u662F\u6211\u8001\u5BB6\u9662\u5B50\u7684\u4E00\u4E2A\u8FD1\u51B5\uFF0C\u6BCF\u6B21\u56DE\u53BB\uFF0C\u843D\u53F6\u90FD\u4F1A\u5806\u79EF\u4E00\u5C42\uFF0C\u4EFF\u4F5B\u5C31\u50CF\u662F\u88AB\u65F6\u95F4\u9057\u5FD8\u4E86\u7684\u89D2\u843D\u3002\u5927\u6982\u662F\u6211\u5927\u5B66\u6BD5\u4E1A\u53BB\u82CF\u5DDE\u53C2\u52A0\u5DE5\u4F5C\u540E\uFF0C\u6211\u4EEC\u5168\u5BB6\u5C31\u5F88\u5C11\u5728\u8FD9\u91CC\u4F4F\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/fumutuanju-2.png" alt=""></p><p>\u6700\u8FD1\u7206\u706B\u7684\u7535\u89C6\u5267\u300A\u4EBA\u4E16\u95F4\u300B\u91CC\u597D\u50CF\u6709\u8FD9\u6837\u4E00\u6BB5\u65C1\u767D\uFF1A\u201C<strong>\u7A77\u4EBA\u5BB6\u7684\u5B69\u5B50\uFF0C\u5927\u62B5\u4F1A\u5206\u4E3A\u4E24\u7C7B\uFF0C\u4E00\u7C7B\u4F1A\u56E0\u4E3A\u81EA\u5DF1\u7684\u6210\u957F\u73AF\u5883\u800C\u611F\u5230\u81EA\u5351\u3001\u81EA\u6028\uFF0C\u4EE5\u81F3\u4E8E\u5931\u53BB\u81EA\u6211\uFF0C\u4E27\u5931\u4E86\u5BF9\u672A\u6765\u7684\u4E3B\u52A8\u6743\uFF1B\u4E00\u7C7B\u4F1A\u4E0D\u61C8\u52AA\u529B\uFF0C\u5C1D\u8BD5\u53BB\u6539\u53D8\u547D\u8FD0\uFF0C\u8D62\u5F97\u8FD9\u4E2A\u4E16\u754C\u91CC\u4E00\u7247\u5C5E\u4E8E\u81EA\u5DF1\u7684\u5929\u7A7A</strong>\u3002\u201D</p><p>\u6211\u5BF9\u81EA\u5DF1\u7684\u8BC4\u4EF7\u662F\uFF0C\u5C45\u4E8E\u4E24\u8005\u4E4B\u95F4\u3002\u65E2\u6709\u81EA\u5351\uFF0C\u4E5F\u4F1A\u8FFD\u6C42\u8D85\u8D8A\u3002</p><p>\u7236\u4EB2\u5BF9\u6211\u662F\u6BD4\u8F83\u82DB\u523B\u548C\u4E25\u5389\u7684\uFF0C\u5C0F\u65F6\u5019\u671B\u5B50\u6210\u9F99\uFF0C\u671F\u671B\u6BD4\u8F83\u9AD8\uFF0C\u7ECF\u5E38\u4F1A\u56E0\u4E3A\u5199\u4F5C\u4E1A\u628A\u6211\u6253\u5F97\u773C\u6CEA\u76F4\u6D41\uFF1B\u540E\u6765\u6E10\u6E10\u5931\u671B\uFF0C\u4EE5\u81F3\u4E8E\u7236\u5B50\u4E4B\u95F4\u4EA7\u751F\u8BEF\u4F1A\u751A\u81F3\u758F\u79BB\uFF1B\u8FD1\u4E9B\u5E74\u53C8\u5927\u6709\u6539\u89C2\uFF0C\u5BF9\u6211\u751A\u611F\u6B23\u6170\uFF1A</p><blockquote><p>\u4F60\u7EC8\u7A76\u662F\u901A\u8FC7\u4F60\u7684\u6587\u5B57\u548C\u52AA\u529B\u5E2E\u52A9\u5230\u4E86\u4ED6\u4EBA\uFF0C\u6211\u4E0D\u77E5\u9053\u4F60\u7A76\u7ADF\u5F71\u54CD\u4E86\u591A\u5C11\u4EBA\uFF0C\u4F46\u81F3\u5C11\u5728\u6211\u770B\u6765\uFF0C\u8FD9\u662F\u6709\u610F\u4E49\u7684\u3002</p></blockquote><p>\u516C\u4F17\u53F7\u540E\u53F0\u662F\u80FD\u770B\u5230\u6570\u636E\u7684\uFF0C\u7236\u4EB2\u7684\u5FAE\u4FE1\u53F7\u662F\u9605\u8BFB\u6700\u591A\u7684\u524D\u51E0\u4F4D\u3002\u8981\u77E5\u9053\uFF0C\u6280\u672F\u6587\u7AE0\u4ED6\u53EF\u662F\u770B\u4E0D\u61C2\u7684\uFF0C\u770B\u5F97\u61C2\u7684\u4E5F\u5C31\u662F\u6211\u73B0\u5728\u5199\u7684\u8FD9\u79CD\u7C7B\u578B\u7684\u5C0F\u6563\u6587\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/fumutuanju-3.png" alt=""></p><p><strong>\u7236\u4EB2\u662F\u81EA\u5DF1\u6700\u5FE0\u5B9E\u7684\u8BFB\u8005\u4E4B\u4E00\uFF0C\u60F3\u60F3\u4E5F\u662F\u4E00\u4EF6\u633A\u5E78\u798F\u7684\u4E8B\u60C5</strong>\u3002</p><p>\u6211\u662F\u6628\u5929\u591C\u91CC\u5F00\u8F66\u6765\u4E09\u95E8\u5CE1\u7684\uFF0C\u56E0\u4E3A\u5468\u516D\u5973\u513F\u8981\u4E0A\u821E\u8E48\u8BFE\u548C\u82F1\u8BED\u8BFE\uFF0C\u4E0A\u5B8C\u5C31\u665A\u4E0A 7 \u70B9\u5DE6\u53F3\u4E86\u3002\u591C\u91CC\u5F00\u8F66\u975E\u5E38\u7D2F\uFF0C\u56E0\u4E3A\u5BF9\u9762\u8F66\u9053\u548C\u540E\u9762\u5012\u8F66\u955C\u91CC\u7684\u8FDC\u5149\u706F\u975E\u5E38\u7684\u523A\u773C\uFF0C\u4F46\u53C8\u4E0D\u60F3\u8BF7\u5047\u803D\u8BEF\u5973\u513F\u7684\u8BFE\u7A0B\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/fumutuanju-4.png" 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alt=""></p><p>\u6700\u8FD1\u7206\u706B\u7684\u7535\u89C6\u5267\u300A\u4EBA\u4E16\u95F4\u300B\u91CC\u597D\u50CF\u6709\u8FD9\u6837\u4E00\u6BB5\u65C1\u767D\uFF1A\u201C<strong>\u7A77\u4EBA\u5BB6\u7684\u5B69\u5B50\uFF0C\u5927\u62B5\u4F1A\u5206\u4E3A\u4E24\u7C7B\uFF0C\u4E00\u7C7B\u4F1A\u56E0\u4E3A\u81EA\u5DF1\u7684\u6210\u957F\u73AF\u5883\u800C\u611F\u5230\u81EA\u5351\u3001\u81EA\u6028\uFF0C\u4EE5\u81F3\u4E8E\u5931\u53BB\u81EA\u6211\uFF0C\u4E27\u5931\u4E86\u5BF9\u672A\u6765\u7684\u4E3B\u52A8\u6743\uFF1B\u4E00\u7C7B\u4F1A\u4E0D\u61C8\u52AA\u529B\uFF0C\u5C1D\u8BD5\u53BB\u6539\u53D8\u547D\u8FD0\uFF0C\u8D62\u5F97\u8FD9\u4E2A\u4E16\u754C\u91CC\u4E00\u7247\u5C5E\u4E8E\u81EA\u5DF1\u7684\u5929\u7A7A</strong>\u3002\u201D</p><p>\u6211\u5BF9\u81EA\u5DF1\u7684\u8BC4\u4EF7\u662F\uFF0C\u5C45\u4E8E\u4E24\u8005\u4E4B\u95F4\u3002\u65E2\u6709\u81EA\u5351\uFF0C\u4E5F\u4F1A\u8FFD\u6C42\u8D85\u8D8A\u3002</p><p>\u7236\u4EB2\u5BF9\u6211\u662F\u6BD4\u8F83\u82DB\u523B\u548C\u4E25\u5389\u7684\uFF0C\u5C0F\u65F6\u5019\u671B\u5B50\u6210\u9F99\uFF0C\u671F\u671B\u6BD4\u8F83\u9AD8\uFF0C\u7ECF\u5E38\u4F1A\u56E0\u4E3A\u5199\u4F5C\u4E1A\u628A\u6211\u6253\u5F97\u773C\u6CEA\u76F4\u6D41\uFF1B\u540E\u6765\u6E10\u6E10\u5931\u671B\uFF0C\u4EE5\u81F3\u4E8E\u7236\u5B50\u4E4B\u95F4\u4EA7\u751F\u8BEF\u4F1A\u751A\u81F3\u758F\u79BB\uFF1B\u8FD1\u4E9B\u5E74\u53C8\u5927\u6709\u6539\u89C2\uFF0C\u5BF9\u6211\u751A\u611F\u6B23\u6170\uFF1A</p><blockquote><p>\u4F60\u7EC8\u7A76\u662F\u901A\u8FC7\u4F60\u7684\u6587\u5B57\u548C\u52AA\u529B\u5E2E\u52A9\u5230\u4E86\u4ED6\u4EBA\uFF0C\u6211\u4E0D\u77E5\u9053\u4F60\u7A76\u7ADF\u5F71\u54CD\u4E86\u591A\u5C11\u4EBA\uFF0C\u4F46\u81F3\u5C11\u5728\u6211\u770B\u6765\uFF0C\u8FD9\u662F\u6709\u610F\u4E49\u7684\u3002</p></blockquote><p>\u516C\u4F17\u53F7\u540E\u53F0\u662F\u80FD\u770B\u5230\u6570\u636E\u7684\uFF0C\u7236\u4EB2\u7684\u5FAE\u4FE1\u53F7\u662F\u9605\u8BFB\u6700\u591A\u7684\u524D\u51E0\u4F4D\u3002\u8981\u77E5\u9053\uFF0C\u6280\u672F\u6587\u7AE0\u4ED6\u53EF\u662F\u770B\u4E0D\u61C2\u7684\uFF0C\u770B\u5F97\u61C2\u7684\u4E5F\u5C31\u662F\u6211\u73B0\u5728\u5199\u7684\u8FD9\u79CD\u7C7B\u578B\u7684\u5C0F\u6563\u6587\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/fumutuanju-3.png" alt=""></p><p><strong>\u7236\u4EB2\u662F\u81EA\u5DF1\u6700\u5FE0\u5B9E\u7684\u8BFB\u8005\u4E4B\u4E00\uFF0C\u60F3\u60F3\u4E5F\u662F\u4E00\u4EF6\u633A\u5E78\u798F\u7684\u4E8B\u60C5</strong>\u3002</p><p>\u6211\u662F\u6628\u5929\u591C\u91CC\u5F00\u8F66\u6765\u4E09\u95E8\u5CE1\u7684\uFF0C\u56E0\u4E3A\u5468\u516D\u5973\u513F\u8981\u4E0A\u821E\u8E48\u8BFE\u548C\u82F1\u8BED\u8BFE\uFF0C\u4E0A\u5B8C\u5C31\u665A\u4E0A 7 \u70B9\u5DE6\u53F3\u4E86\u3002\u591C\u91CC\u5F00\u8F66\u975E\u5E38\u7D2F\uFF0C\u56E0\u4E3A\u5BF9\u9762\u8F66\u9053\u548C\u540E\u9762\u5012\u8F66\u955C\u91CC\u7684\u8FDC\u5149\u706F\u975E\u5E38\u7684\u523A\u773C\uFF0C\u4F46\u53C8\u4E0D\u60F3\u8BF7\u5047\u803D\u8BEF\u5973\u513F\u7684\u8BFE\u7A0B\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/fumutuanju-4.png" alt=""></p><p>\u5FEB\u5230\u7236\u6BCD\u4F4F\u5904\u7684\u65F6\u5019\uFF0C\u6211\u7684\u773C\u775B\u91CC\u626B\u5230\u4E86\u4E00\u4E2A\u719F\u6089\u7684\u80CC\u5F71\uFF0C\u90A3\u80CC\u5F71\uFF0C\u5373\u4FBF\u662F\u5728\u6F06\u9ED1\u7684\u591C\u91CC\uFF0C\u5373\u4FBF\u8FD9\u591C\u91CC\u53EA\u6709\u6697\u6DE1\u7684\u6708\u5149\u548C\u6211\u90A3\u4E0D\u4E89\u6C14\u7684\u5364\u7D20\u8F66\u706F\uFF0C\u6211\u4E5F\u77E5\u9053\uFF0C\u90A3\u662F\u7236\u4EB2\u7684\u80CC\u5F71\u3002</p><p>\u539F\u6765\u7236\u4EB2\u5DF2\u7ECF\u65E9\u65E9\u7684\u5728\u8DEF\u8FB9\u7B49\u5F85\u4E86\u3002</p><p><strong>\u90A3\u4E48\u4E00\u523B\uFF0C\u6211\u53C8\u4E00\u6B21\u6E05\u695A\u5730\u611F\u53D7\u5230\u4E86\u4EB2\u60C5\u7684\u529B\u91CF\uFF0C\u548C\u56E2\u805A\u7684\u610F\u4E49</strong>\u3002</p><p>\u811A\u5DF2\u7ECF\u4E0D\u7531\u81EA\u4E3B\u5730\u8E29\u4E86\u5239\u8F66\uFF0C\u8F66\u901F\u6025\u5267\u4E0B\u964D\uFF0C\u4E0E\u6B64\u540C\u65F6\uFF0C\u6211\u6447\u4E0B\u8F66\u7A97\uFF0C\u53EF\u6CA1\u7B49\u6211\u558A\u51FA\u90A3\u53E5\u719F\u6089\u7684\u53F0\u8BCD\uFF0C\u5973\u513F\u5DF2\u7ECF\u6B23\u559C\u82E5\u72C2\u5730\u671D\u90A3\u4E2A\u4F1F\u5CB8\u7684\u8EAB\u5F71\u5927\u58F0\u5730\u558A\u51FA\u4E86\u201C\u7237\u7237\uFF01\u7237\u7237\uFF01\u201D</p><p>\u6FC0\u52A8\u5F97\u5C31\u597D\u50CF\u662F\u4E45\u522B\u91CD\u9022\u3002</p><p>\u5173\u6CE8\u6211\u7684\u8BFB\u8005\uFF0C99%\u5E94\u8BE5\u90FD\u662F\u4E92\u8054\u7F51\u4ECE\u4E1A\u8005\uFF0C\u800C\u4E92\u8054\u7F51\u4ECE\u4E1A\u8005\u8981\u60F3\u83B7\u5F97\u9AD8\u85AA\uFF0C\u9996\u9009\u5317\u4E0A\u5E7F\u6DF1\u676D\u8FD9\u6837\u7684\u4E00\u7EBF\u57CE\u5E02\u662F\u4E00\u4E2A\u4E0D\u5BB9\u7F6E\u7591\u7684\u9009\u62E9\u3002\u90A3\u4E5F\u5C31\u610F\u5473\u7740\uFF0C\u5927\u90E8\u5206\u4EBA\u90FD\u53EA\u80FD\u80CC\u4E95\u79BB\u4E61\uFF0C\u548C\u7236\u6BCD\u76F8\u9694\u4E24\u5730\uFF0C\u56E2\u805A\u7684\u65E5\u5B50\u5C31\u5269\u4E0B\u90A3\u4E9B\u53C8\u5835\u8F66\u53C8\u96BE\u4E70\u7968\u7684\u5047\u671F\u4E86\u3002</p><p>\u6211\u4E00\u5F00\u59CB\u53BB\u82CF\u5DDE\u53C2\u52A0\u5DE5\u4F5C\u65F6\uFF0C\u62B1\u5B9A\u7684\u51B3\u5FC3\u4E5F\u662F\u4E00\u5B9A\u8981\u5728\u90A3\u91CC\u5B9A\u5C45\uFF0C\u6211\u8981\u4E70\u623F\uFF0C\u7136\u540E\u628A\u7236\u6BCD\u63A5\u5230\u90A3\u91CC\u53BB\u4F4F\u3002</p><p>\u8BB2\u771F\u5FC3\u8BDD\uFF0C\u82CF\u5DDE\u662F\u4E00\u4E2A\u975E\u5E38\u5B9C\u5C45\u7684\u57CE\u5E02\uFF0C\u4E0D\u4EC5\u4EC5\u662F\u56E0\u4E3A\u90A3\u91CC\u7684\u73AF\u5883\u597D\uFF0C\u8FD8\u6709\u90A3\u91CC\u7684\u4EBA\u4E5F\u90FD\u975E\u5E38\u7684 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diff --git a/dist/assets/gailan.html.89a0a128.js b/dist/assets/gailan.html.0ea3f7da.js
similarity index 99%
rename from dist/assets/gailan.html.89a0a128.js
rename to dist/assets/gailan.html.0ea3f7da.js
index 50084f3d..e56f73f1 100644
--- a/dist/assets/gailan.html.89a0a128.js
+++ b/dist/assets/gailan.html.0ea3f7da.js
@@ -1,4 +1,4 @@
-import{_ as e}from"./plugin-vue_export-helper.21dcd24c.js";import{r as c,o,c as i,a as s,b as p,e as a,d as n}from"./app.a0271b9c.js";const l={},u=a(`<h1 id="\u4E00\u6587\u8BFB\u61C2java\u5F02\u5E38\u5904\u7406" tabindex="-1"><a class="header-anchor" href="#\u4E00\u6587\u8BFB\u61C2java\u5F02\u5E38\u5904\u7406" aria-hidden="true">#</a> \u4E00\u6587\u8BFB\u61C2Java\u5F02\u5E38\u5904\u7406</h1><h2 id="\u4E00\u3001\u4EC0\u4E48\u662F\u5F02\u5E38" tabindex="-1"><a class="header-anchor" href="#\u4E00\u3001\u4EC0\u4E48\u662F\u5F02\u5E38" aria-hidden="true">#</a> \u4E00\u3001\u4EC0\u4E48\u662F\u5F02\u5E38</h2><p>\u201C\u4E8C\u54E5\uFF0C\u4ECA\u5929\u5C31\u8981\u5B66\u4E60\u5F02\u5E38\u4E86\u5417\uFF1F\u201D\u4E09\u59B9\u95EE\u3002</p><p>\u201C\u662F\u7684\u3002\u53EA\u6709\u6B63\u786E\u5730\u5904\u7406\u597D\u5F02\u5E38\uFF0C\u624D\u80FD\u4FDD\u8BC1\u7A0B\u5E8F\u7684\u53EF\u9760\u6027\uFF0C\u6240\u4EE5\u5F02\u5E38\u7684\u5B66\u4E60\u8FD8\u662F\u5F88\u6709\u5FC5\u8981\u7684\u3002\u201D\u6211\u8BF4\u3002</p><p>\u201C\u90A3\u5230\u5E95\u4EC0\u4E48\u662F\u5F02\u5E38\u5462\uFF1F\u201D\u4E09\u59B9\u95EE\u3002</p><p>\u201C\u5F02\u5E38\u662F\u6307\u4E2D\u65AD\u7A0B\u5E8F\u6B63\u5E38\u6267\u884C\u7684\u4E00\u4E2A\u4E0D\u786E\u5B9A\u7684\u4E8B\u4EF6\u3002\u5F53\u5F02\u5E38\u53D1\u751F\u65F6\uFF0C\u7A0B\u5E8F\u7684\u6B63\u5E38\u6267\u884C\u6D41\u7A0B\u5C31\u4F1A\u88AB\u6253\u65AD\u3002\u4E00\u822C\u60C5\u51B5\u4E0B\uFF0C\u7A0B\u5E8F\u90FD\u4F1A\u6709\u5F88\u591A\u6761\u8BED\u53E5\uFF0C\u5982\u679C\u6CA1\u6709\u5F02\u5E38\u5904\u7406\u673A\u5236\uFF0C\u524D\u9762\u7684\u8BED\u53E5\u4E00\u65E6\u51FA\u73B0\u4E86\u5F02\u5E38\uFF0C\u540E\u9762\u7684\u8BED\u53E5\u5C31\u6CA1\u529E\u6CD5\u7EE7\u7EED\u6267\u884C\u4E86\u3002\u201D</p><p>\u201C\u6709\u4E86\u5F02\u5E38\u5904\u7406\u673A\u5236\u540E\uFF0C\u7A0B\u5E8F\u5728\u53D1\u751F\u5F02\u5E38\u7684\u65F6\u5019\u5C31\u4E0D\u4F1A\u4E2D\u65AD\uFF0C\u6211\u4EEC\u53EF\u4EE5\u5BF9\u5F02\u5E38\u8FDB\u884C\u6355\u83B7\uFF0C\u7136\u540E\u6539\u53D8\u7A0B\u5E8F\u6267\u884C\u7684\u6D41\u7A0B\u3002\u201D</p><p>\u201C\u9664\u6B64\u4E4B\u5916\uFF0C\u5F02\u5E38\u5904\u7406\u673A\u5236\u53EF\u4EE5\u4FDD\u8BC1\u6211\u4EEC\u5411\u7528\u6237\u63D0\u4F9B\u53CB\u597D\u7684\u63D0\u793A\u4FE1\u606F\uFF0C\u800C\u4E0D\u662F\u7A0B\u5E8F\u539F\u751F\u7684\u5F02\u5E38\u4FE1\u606F\u2014\u2014\u7528\u6237\u6839\u672C\u7406\u89E3\u4E0D\u4E86\u3002\u201D</p><p>\u201C\u4E0D\u8FC7\uFF0C\u7AD9\u5728\u5F00\u53D1\u8005\u7684\u89D2\u5EA6\uFF0C\u6211\u4EEC\u66F4\u5E0C\u671B\u770B\u5230\u539F\u751F\u7684\u5F02\u5E38\u4FE1\u606F\uFF0C\u56E0\u4E3A\u8FD9\u6709\u52A9\u4E8E\u6211\u4EEC\u66F4\u5FEB\u5730\u627E\u5230 bug \u7684\u6839\u6E90\uFF0C\u53CD\u800C\u88AB\u8FC7\u5EA6\u5305\u88C5\u7684\u5F02\u5E38\u4FE1\u606F\u4F1A\u5E72\u6270\u6211\u4EEC\u7684\u89C6\u7EBF\u3002\u201D</p><p>\u201CJava \u8BED\u8A00\u5728\u4E00\u5F00\u59CB\u5C31\u63D0\u4F9B\u4E86\u76F8\u5BF9\u5B8C\u5584\u7684\u5F02\u5E38\u5904\u7406\u673A\u5236\uFF0C\u8FD9\u79CD\u673A\u5236\u5927\u5927\u964D\u4F4E\u4E86\u7F16\u5199\u53EF\u9760\u7A0B\u5E8F\u7684\u95E8\u69DB\uFF0C\u8FD9\u4E5F\u662F Java \u4E4B\u6240\u4EE5\u80FD\u591F\u6D41\u884C\u7684\u539F\u56E0\u4E4B\u4E00\u3002\u201D</p><p>\u201C\u90A3\u5BFC\u81F4\u7A0B\u5E8F\u629B\u51FA\u5F02\u5E38\u7684\u539F\u56E0\u6709\u54EA\u4E9B\u5462\uFF1F\u201D\u4E09\u59B9\u95EE\u3002</p><p>\u6BD4\u5982\u8BF4\uFF1A</p><ul><li>\u7A0B\u5E8F\u5728\u8BD5\u56FE\u6253\u5F00\u4E00\u4E2A\u4E0D\u5B58\u5728\u7684\u6587\u4EF6\uFF1B</li><li>\u7A0B\u5E8F\u9047\u5230\u4E86\u7F51\u7EDC\u8FDE\u63A5\u95EE\u9898\uFF1B</li><li>\u7528\u6237\u8F93\u5165\u4E86\u7CDF\u7CD5\u7684\u6570\u636E\uFF1B</li><li>\u7A0B\u5E8F\u5728\u5904\u7406\u7B97\u672F\u95EE\u9898\u65F6\u6CA1\u6709\u8003\u8651\u9664\u6570\u4E3A 0 \u7684\u60C5\u51B5\uFF1B</li></ul><p>\u7B49\u7B49\u7B49\u7B49\u3002</p><p>\u6311\u4E2A\u6700\u7B80\u5355\u7684\u539F\u56E0\u6765\u8BF4\u5427\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">Demo</span> <span class="token punctuation">{</span>
+import{_ as e}from"./plugin-vue_export-helper.21dcd24c.js";import{r as c,o,c as i,a as s,b as p,e as a,d as n}from"./app.615e41d8.js";const l={},u=a(`<h1 id="\u4E00\u6587\u8BFB\u61C2java\u5F02\u5E38\u5904\u7406" tabindex="-1"><a class="header-anchor" href="#\u4E00\u6587\u8BFB\u61C2java\u5F02\u5E38\u5904\u7406" aria-hidden="true">#</a> \u4E00\u6587\u8BFB\u61C2Java\u5F02\u5E38\u5904\u7406</h1><h2 id="\u4E00\u3001\u4EC0\u4E48\u662F\u5F02\u5E38" tabindex="-1"><a class="header-anchor" href="#\u4E00\u3001\u4EC0\u4E48\u662F\u5F02\u5E38" aria-hidden="true">#</a> \u4E00\u3001\u4EC0\u4E48\u662F\u5F02\u5E38</h2><p>\u201C\u4E8C\u54E5\uFF0C\u4ECA\u5929\u5C31\u8981\u5B66\u4E60\u5F02\u5E38\u4E86\u5417\uFF1F\u201D\u4E09\u59B9\u95EE\u3002</p><p>\u201C\u662F\u7684\u3002\u53EA\u6709\u6B63\u786E\u5730\u5904\u7406\u597D\u5F02\u5E38\uFF0C\u624D\u80FD\u4FDD\u8BC1\u7A0B\u5E8F\u7684\u53EF\u9760\u6027\uFF0C\u6240\u4EE5\u5F02\u5E38\u7684\u5B66\u4E60\u8FD8\u662F\u5F88\u6709\u5FC5\u8981\u7684\u3002\u201D\u6211\u8BF4\u3002</p><p>\u201C\u90A3\u5230\u5E95\u4EC0\u4E48\u662F\u5F02\u5E38\u5462\uFF1F\u201D\u4E09\u59B9\u95EE\u3002</p><p>\u201C\u5F02\u5E38\u662F\u6307\u4E2D\u65AD\u7A0B\u5E8F\u6B63\u5E38\u6267\u884C\u7684\u4E00\u4E2A\u4E0D\u786E\u5B9A\u7684\u4E8B\u4EF6\u3002\u5F53\u5F02\u5E38\u53D1\u751F\u65F6\uFF0C\u7A0B\u5E8F\u7684\u6B63\u5E38\u6267\u884C\u6D41\u7A0B\u5C31\u4F1A\u88AB\u6253\u65AD\u3002\u4E00\u822C\u60C5\u51B5\u4E0B\uFF0C\u7A0B\u5E8F\u90FD\u4F1A\u6709\u5F88\u591A\u6761\u8BED\u53E5\uFF0C\u5982\u679C\u6CA1\u6709\u5F02\u5E38\u5904\u7406\u673A\u5236\uFF0C\u524D\u9762\u7684\u8BED\u53E5\u4E00\u65E6\u51FA\u73B0\u4E86\u5F02\u5E38\uFF0C\u540E\u9762\u7684\u8BED\u53E5\u5C31\u6CA1\u529E\u6CD5\u7EE7\u7EED\u6267\u884C\u4E86\u3002\u201D</p><p>\u201C\u6709\u4E86\u5F02\u5E38\u5904\u7406\u673A\u5236\u540E\uFF0C\u7A0B\u5E8F\u5728\u53D1\u751F\u5F02\u5E38\u7684\u65F6\u5019\u5C31\u4E0D\u4F1A\u4E2D\u65AD\uFF0C\u6211\u4EEC\u53EF\u4EE5\u5BF9\u5F02\u5E38\u8FDB\u884C\u6355\u83B7\uFF0C\u7136\u540E\u6539\u53D8\u7A0B\u5E8F\u6267\u884C\u7684\u6D41\u7A0B\u3002\u201D</p><p>\u201C\u9664\u6B64\u4E4B\u5916\uFF0C\u5F02\u5E38\u5904\u7406\u673A\u5236\u53EF\u4EE5\u4FDD\u8BC1\u6211\u4EEC\u5411\u7528\u6237\u63D0\u4F9B\u53CB\u597D\u7684\u63D0\u793A\u4FE1\u606F\uFF0C\u800C\u4E0D\u662F\u7A0B\u5E8F\u539F\u751F\u7684\u5F02\u5E38\u4FE1\u606F\u2014\u2014\u7528\u6237\u6839\u672C\u7406\u89E3\u4E0D\u4E86\u3002\u201D</p><p>\u201C\u4E0D\u8FC7\uFF0C\u7AD9\u5728\u5F00\u53D1\u8005\u7684\u89D2\u5EA6\uFF0C\u6211\u4EEC\u66F4\u5E0C\u671B\u770B\u5230\u539F\u751F\u7684\u5F02\u5E38\u4FE1\u606F\uFF0C\u56E0\u4E3A\u8FD9\u6709\u52A9\u4E8E\u6211\u4EEC\u66F4\u5FEB\u5730\u627E\u5230 bug \u7684\u6839\u6E90\uFF0C\u53CD\u800C\u88AB\u8FC7\u5EA6\u5305\u88C5\u7684\u5F02\u5E38\u4FE1\u606F\u4F1A\u5E72\u6270\u6211\u4EEC\u7684\u89C6\u7EBF\u3002\u201D</p><p>\u201CJava \u8BED\u8A00\u5728\u4E00\u5F00\u59CB\u5C31\u63D0\u4F9B\u4E86\u76F8\u5BF9\u5B8C\u5584\u7684\u5F02\u5E38\u5904\u7406\u673A\u5236\uFF0C\u8FD9\u79CD\u673A\u5236\u5927\u5927\u964D\u4F4E\u4E86\u7F16\u5199\u53EF\u9760\u7A0B\u5E8F\u7684\u95E8\u69DB\uFF0C\u8FD9\u4E5F\u662F Java \u4E4B\u6240\u4EE5\u80FD\u591F\u6D41\u884C\u7684\u539F\u56E0\u4E4B\u4E00\u3002\u201D</p><p>\u201C\u90A3\u5BFC\u81F4\u7A0B\u5E8F\u629B\u51FA\u5F02\u5E38\u7684\u539F\u56E0\u6709\u54EA\u4E9B\u5462\uFF1F\u201D\u4E09\u59B9\u95EE\u3002</p><p>\u6BD4\u5982\u8BF4\uFF1A</p><ul><li>\u7A0B\u5E8F\u5728\u8BD5\u56FE\u6253\u5F00\u4E00\u4E2A\u4E0D\u5B58\u5728\u7684\u6587\u4EF6\uFF1B</li><li>\u7A0B\u5E8F\u9047\u5230\u4E86\u7F51\u7EDC\u8FDE\u63A5\u95EE\u9898\uFF1B</li><li>\u7528\u6237\u8F93\u5165\u4E86\u7CDF\u7CD5\u7684\u6570\u636E\uFF1B</li><li>\u7A0B\u5E8F\u5728\u5904\u7406\u7B97\u672F\u95EE\u9898\u65F6\u6CA1\u6709\u8003\u8651\u9664\u6570\u4E3A 0 \u7684\u60C5\u51B5\uFF1B</li></ul><p>\u7B49\u7B49\u7B49\u7B49\u3002</p><p>\u6311\u4E2A\u6700\u7B80\u5355\u7684\u539F\u56E0\u6765\u8BF4\u5427\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">Demo</span> <span class="token punctuation">{</span>
     <span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">void</span> <span class="token function">main</span><span class="token punctuation">(</span><span class="token class-name">String</span><span class="token punctuation">[</span><span class="token punctuation">]</span> args<span class="token punctuation">)</span> <span class="token punctuation">{</span>
         <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token number">10</span><span class="token operator">/</span><span class="token number">0</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
     <span class="token punctuation">}</span>
diff --git a/dist/assets/gailan.html.a5bab427.js b/dist/assets/gailan.html.50f82bf5.js
similarity index 99%
rename from dist/assets/gailan.html.a5bab427.js
rename to dist/assets/gailan.html.50f82bf5.js
index fc6a372f..182ad85c 100644
--- a/dist/assets/gailan.html.a5bab427.js
+++ b/dist/assets/gailan.html.50f82bf5.js
@@ -1,4 +1,4 @@
-import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e as p}from"./app.a0271b9c.js";const t={},e=p(`<h1 id="java\u96C6\u5408\u6846\u67B6" tabindex="-1"><a class="header-anchor" href="#java\u96C6\u5408\u6846\u67B6" aria-hidden="true">#</a> Java\u96C6\u5408\u6846\u67B6</h1><p>\u773C\u7785\u7740\u4E09\u59B9\u7684\u738B\u8005\u8363\u8000\u6740\u5F97\u6B63\u55E8\uFF0C\u6211\u8D81\u673A\u558A\u5230\uFF1A\u201C\u522B\u6253\u4E86\uFF0C\u4E09\u59B9\uFF0C\u6211\u4EEC\u6765\u4E00\u8D77\u5B66\u4E60 Java \u7684\u96C6\u5408\u6846\u67B6\u5427\u3002\u201D</p><p>\u201C\u624D\u4E0D\u8981\u5462\uFF0C\u7B49\u6211\u6253\u5B8C\u8FD9\u4E00\u5C40\u554A\u3002\u201D\u4E09\u59B9\u5014\u5F3A\u5730\u8BF4\u3002</p><p>\u201C\u597D\u5427\u3002\u201D\u6211\u53EA\u597D\u644A\u644A\u624B\u5730\u8BF4\uFF0C\u201C\u90A3\u6211\u5148\u753B\u5F20\u96C6\u5408\u6846\u67B6\u7684\u7ED3\u6784\u56FE\u7B49\u7740\u4F60\u3002\u201D</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/collection/gailan-01.png" alt=""></p><p>\u201C\u5B8C\u4E86\u6CA1\uFF1F\u4E09\u59B9\u3002\u201D</p><p>\u201C\u5B8C\u4E86\u597D\u4E00\u4F1A\u513F\u4E86\uFF0C\u4E8C\u54E5\uFF0C\u4F60\u56FE\u753B\u5F97\u771F\u6162\uFF0C\u8BA9\u6211\u77A7\u77A7\u600E\u4E48\u6837\uFF1F\u201D</p><p>\u201C\u5BB3\uFF0C\u56FE\u8981\u753B\u5F97\u6E05\u6670\u660E\u4E86\uFF0C\u4E0D\u5BB9\u6613\u7684\u3002\u4E09\u59B9\uFF0C\u4F60\u77A7\uFF0C\u4E0D\u9519\u5427\u3002\u201D</p><p>Java \u96C6\u5408\u6846\u67B6\u53EF\u4EE5\u5206\u4E3A\u4E24\u6761\u5927\u7684\u652F\u7EBF\uFF1A</p><ul><li>Collection\uFF0C\u4E3B\u8981\u7531 List\u3001Set\u3001Queue \u7EC4\u6210\uFF0CList \u4EE3\u8868\u6709\u5E8F\u3001\u53EF\u91CD\u590D\u7684\u96C6\u5408\uFF0C\u5178\u578B\u4EE3\u8868\u5C31\u662F\u5C01\u88C5\u4E86\u52A8\u6001\u6570\u7EC4\u7684 ArrayList \u548C\u5C01\u88C5\u4E86\u94FE\u8868\u7684 LinkedList\uFF1BSet \u4EE3\u8868\u65E0\u5E8F\u3001\u4E0D\u53EF\u91CD\u590D\u7684\u96C6\u5408\uFF0C\u5178\u578B\u4EE3\u8868\u5C31\u662F HashSet \u548C TreeSet\uFF1BQueue \u4EE3\u8868\u961F\u5217\uFF0C\u5178\u578B\u4EE3\u8868\u5C31\u662F\u53CC\u7AEF\u961F\u5217 ArrayDeque\uFF0C\u4EE5\u53CA\u4F18\u5148\u7EA7\u961F\u5217 PriorityQue\u3002</li><li>Map\uFF0C\u4EE3\u8868\u952E\u503C\u5BF9\u7684\u96C6\u5408\uFF0C\u5178\u578B\u4EE3\u8868\u5C31\u662F HashMap\u3002</li></ul><p>\u201C\u63A5\u4E0B\u6765\uFF0C\u6211\u4EEC\u518D\u6765\u8FC7\u4E00\u904D\u3002\u201D</p><h3 id="_01\u3001list" tabindex="-1"><a class="header-anchor" href="#_01\u3001list" aria-hidden="true">#</a> 01\u3001List</h3><blockquote><p>List \u7684\u7279\u70B9\u662F\u5B58\u53D6\u6709\u5E8F\uFF0C\u53EF\u4EE5\u5B58\u653E\u91CD\u590D\u7684\u5143\u7D20\uFF0C\u53EF\u4EE5\u7528\u4E0B\u6807\u5BF9\u5143\u7D20\u8FDB\u884C\u64CD\u4F5C</p></blockquote><p><strong>1\uFF09ArrayList</strong></p><ul><li>ArrayList \u662F\u7531\u6570\u7EC4\u5B9E\u73B0\u7684\uFF0C\u652F\u6301\u968F\u673A\u5B58\u53D6\uFF0C\u4E5F\u5C31\u662F\u53EF\u4EE5\u901A\u8FC7\u4E0B\u6807\u76F4\u63A5\u5B58\u53D6\u5143\u7D20\uFF1B</li><li>\u4ECE\u5C3E\u90E8\u63D2\u5165\u548C\u5220\u9664\u5143\u7D20\u4F1A\u6BD4\u8F83\u5FEB\u6377\uFF0C\u4ECE\u4E2D\u95F4\u63D2\u5165\u548C\u5220\u9664\u5143\u7D20\u4F1A\u6BD4\u8F83\u4F4E\u6548\uFF0C\u56E0\u4E3A\u6D89\u53CA\u5230\u6570\u7EC4\u5143\u7D20\u7684\u590D\u5236\u548C\u79FB\u52A8\uFF1B</li><li>\u5982\u679C\u5185\u90E8\u6570\u7EC4\u7684\u5BB9\u91CF\u4E0D\u8DB3\u65F6\u4F1A\u81EA\u52A8\u6269\u5BB9\uFF0C\u56E0\u6B64\u5F53\u5143\u7D20\u975E\u5E38\u5E9E\u5927\u7684\u65F6\u5019\uFF0C\u6548\u7387\u4F1A\u6BD4\u8F83\u4F4E\u3002</li></ul><p><strong>2\uFF09LinkedList</strong></p><ul><li>LinkedList \u662F\u7531\u53CC\u5411\u94FE\u8868\u5B9E\u73B0\u7684\uFF0C\u4E0D\u652F\u6301\u968F\u673A\u5B58\u53D6\uFF0C\u53EA\u80FD\u4ECE\u4E00\u7AEF\u5F00\u59CB\u904D\u5386\uFF0C\u76F4\u5230\u627E\u5230\u9700\u8981\u7684\u5143\u7D20\u540E\u8FD4\u56DE\uFF1B</li><li>\u4EFB\u610F\u4F4D\u7F6E\u63D2\u5165\u548C\u5220\u9664\u5143\u7D20\u90FD\u5F88\u65B9\u4FBF\uFF0C\u56E0\u4E3A\u53EA\u9700\u8981\u6539\u53D8\u524D\u4E00\u4E2A\u8282\u70B9\u548C\u540E\u4E00\u4E2A\u8282\u70B9\u7684\u5F15\u7528\u5373\u53EF\uFF0C\u4E0D\u50CF ArrayList \u90A3\u6837\u9700\u8981\u590D\u5236\u548C\u79FB\u52A8\u6570\u7EC4\u5143\u7D20\uFF1B</li><li>\u56E0\u4E3A\u6BCF\u4E2A\u5143\u7D20\u90FD\u5B58\u50A8\u4E86\u524D\u4E00\u4E2A\u548C\u540E\u4E00\u4E2A\u8282\u70B9\u7684\u5F15\u7528\uFF0C\u6240\u4EE5\u76F8\u5BF9\u6765\u8BF4\uFF0C\u5360\u7528\u7684\u5185\u5B58\u7A7A\u95F4\u4F1A\u6BD4 ArrayList \u591A\u4E00\u4E9B\u3002</li></ul><p><strong>3\uFF09Vector \u548C Stack</strong></p><p>List \u7684\u5B9E\u73B0\u7C7B\u8FD8\u6709\u4E00\u4E2A Vector\uFF0C\u662F\u4E00\u4E2A\u5143\u8001\u7EA7\u7684\u7C7B\uFF0C\u6BD4 ArrayList \u51FA\u73B0\u5F97\u66F4\u65E9\u3002ArrayList \u548C Vector \u975E\u5E38\u76F8\u4F3C\uFF0C\u53EA\u4E0D\u8FC7 Vector \u662F\u7EBF\u7A0B\u5B89\u5168\u7684\uFF0C\u50CF get\u3001set\u3001add \u8FD9\u4E9B\u65B9\u6CD5\u90FD\u52A0\u4E86 <code>synchronized</code> \u5173\u952E\u5B57\uFF0C\u5C31\u5BFC\u81F4\u6267\u884C\u6267\u884C\u6548\u7387\u4F1A\u6BD4\u8F83\u4F4E\uFF0C\u6240\u4EE5\u73B0\u5728\u5DF2\u7ECF\u5F88\u5C11\u7528\u4E86\u3002</p><p>\u66F4\u597D\u7684\u9009\u62E9\u662F\u5E76\u53D1\u5305\u4E0B\u7684 CopyOnWriteArrayList\u3002</p><p>Stack \u662F Vector \u7684\u4E00\u4E2A\u5B50\u7C7B\uFF0C\u672C\u8D28\u4E0A\u4E5F\u662F\u7531\u52A8\u6001\u6570\u7EC4\u5B9E\u73B0\u7684\uFF0C\u53EA\u4E0D\u8FC7\u8FD8\u5B9E\u73B0\u4E86\u5148\u8FDB\u540E\u51FA\u7684\u529F\u80FD\uFF08\u5728 get\u3001set\u3001add \u65B9\u6CD5\u7684\u57FA\u7840\u4E0A\u8FFD\u52A0\u4E86 pop\u3001peek \u7B49\u65B9\u6CD5\uFF09\uFF0C\u6240\u4EE5\u53EB\u6808\u3002</p><p>\u4E0D\u8FC7\uFF0C\u7531\u4E8E Stack \u6267\u884C\u6548\u7387\u6BD4\u8F83\u4F4E\uFF08\u65B9\u6CD5\u4E0A\u540C\u6837\u52A0\u4E86 synchronized \u5173\u952E\u5B57\uFF09\uFF0C\u5C31\u88AB\u53CC\u7AEF\u961F\u5217 ArrayDeque \u53D6\u4EE3\u4E86\u3002</p><h3 id="_02\u3001set" tabindex="-1"><a class="header-anchor" href="#_02\u3001set" aria-hidden="true">#</a> 02\u3001Set</h3><blockquote><p>Set \u7684\u7279\u70B9\u662F\u5B58\u53D6\u65E0\u5E8F\uFF0C\u4E0D\u53EF\u4EE5\u5B58\u653E\u91CD\u590D\u7684\u5143\u7D20\uFF0C\u4E0D\u53EF\u4EE5\u7528\u4E0B\u6807\u5BF9\u5143\u7D20\u8FDB\u884C\u64CD\u4F5C\uFF0C\u548C List \u6709\u5F88\u591A\u4E0D\u540C</p></blockquote><p><strong>1\uFF09HashSet</strong></p><p>HashSet \u5176\u5B9E\u662F\u7531 HashMap \u5B9E\u73B0\u7684\uFF0C\u53EA\u4E0D\u8FC7\u503C\u7531\u4E00\u4E2A\u56FA\u5B9A\u7684 Object \u5BF9\u8C61\u586B\u5145\uFF0C\u800C\u952E\u7528\u4E8E\u64CD\u4F5C\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">HashSet</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">E</span><span class="token punctuation">&gt;</span></span>
+import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e as p}from"./app.615e41d8.js";const t={},e=p(`<h1 id="java\u96C6\u5408\u6846\u67B6" tabindex="-1"><a class="header-anchor" href="#java\u96C6\u5408\u6846\u67B6" aria-hidden="true">#</a> Java\u96C6\u5408\u6846\u67B6</h1><p>\u773C\u7785\u7740\u4E09\u59B9\u7684\u738B\u8005\u8363\u8000\u6740\u5F97\u6B63\u55E8\uFF0C\u6211\u8D81\u673A\u558A\u5230\uFF1A\u201C\u522B\u6253\u4E86\uFF0C\u4E09\u59B9\uFF0C\u6211\u4EEC\u6765\u4E00\u8D77\u5B66\u4E60 Java \u7684\u96C6\u5408\u6846\u67B6\u5427\u3002\u201D</p><p>\u201C\u624D\u4E0D\u8981\u5462\uFF0C\u7B49\u6211\u6253\u5B8C\u8FD9\u4E00\u5C40\u554A\u3002\u201D\u4E09\u59B9\u5014\u5F3A\u5730\u8BF4\u3002</p><p>\u201C\u597D\u5427\u3002\u201D\u6211\u53EA\u597D\u644A\u644A\u624B\u5730\u8BF4\uFF0C\u201C\u90A3\u6211\u5148\u753B\u5F20\u96C6\u5408\u6846\u67B6\u7684\u7ED3\u6784\u56FE\u7B49\u7740\u4F60\u3002\u201D</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/collection/gailan-01.png" alt=""></p><p>\u201C\u5B8C\u4E86\u6CA1\uFF1F\u4E09\u59B9\u3002\u201D</p><p>\u201C\u5B8C\u4E86\u597D\u4E00\u4F1A\u513F\u4E86\uFF0C\u4E8C\u54E5\uFF0C\u4F60\u56FE\u753B\u5F97\u771F\u6162\uFF0C\u8BA9\u6211\u77A7\u77A7\u600E\u4E48\u6837\uFF1F\u201D</p><p>\u201C\u5BB3\uFF0C\u56FE\u8981\u753B\u5F97\u6E05\u6670\u660E\u4E86\uFF0C\u4E0D\u5BB9\u6613\u7684\u3002\u4E09\u59B9\uFF0C\u4F60\u77A7\uFF0C\u4E0D\u9519\u5427\u3002\u201D</p><p>Java \u96C6\u5408\u6846\u67B6\u53EF\u4EE5\u5206\u4E3A\u4E24\u6761\u5927\u7684\u652F\u7EBF\uFF1A</p><ul><li>Collection\uFF0C\u4E3B\u8981\u7531 List\u3001Set\u3001Queue \u7EC4\u6210\uFF0CList \u4EE3\u8868\u6709\u5E8F\u3001\u53EF\u91CD\u590D\u7684\u96C6\u5408\uFF0C\u5178\u578B\u4EE3\u8868\u5C31\u662F\u5C01\u88C5\u4E86\u52A8\u6001\u6570\u7EC4\u7684 ArrayList \u548C\u5C01\u88C5\u4E86\u94FE\u8868\u7684 LinkedList\uFF1BSet \u4EE3\u8868\u65E0\u5E8F\u3001\u4E0D\u53EF\u91CD\u590D\u7684\u96C6\u5408\uFF0C\u5178\u578B\u4EE3\u8868\u5C31\u662F HashSet \u548C TreeSet\uFF1BQueue \u4EE3\u8868\u961F\u5217\uFF0C\u5178\u578B\u4EE3\u8868\u5C31\u662F\u53CC\u7AEF\u961F\u5217 ArrayDeque\uFF0C\u4EE5\u53CA\u4F18\u5148\u7EA7\u961F\u5217 PriorityQue\u3002</li><li>Map\uFF0C\u4EE3\u8868\u952E\u503C\u5BF9\u7684\u96C6\u5408\uFF0C\u5178\u578B\u4EE3\u8868\u5C31\u662F HashMap\u3002</li></ul><p>\u201C\u63A5\u4E0B\u6765\uFF0C\u6211\u4EEC\u518D\u6765\u8FC7\u4E00\u904D\u3002\u201D</p><h3 id="_01\u3001list" tabindex="-1"><a class="header-anchor" href="#_01\u3001list" aria-hidden="true">#</a> 01\u3001List</h3><blockquote><p>List \u7684\u7279\u70B9\u662F\u5B58\u53D6\u6709\u5E8F\uFF0C\u53EF\u4EE5\u5B58\u653E\u91CD\u590D\u7684\u5143\u7D20\uFF0C\u53EF\u4EE5\u7528\u4E0B\u6807\u5BF9\u5143\u7D20\u8FDB\u884C\u64CD\u4F5C</p></blockquote><p><strong>1\uFF09ArrayList</strong></p><ul><li>ArrayList \u662F\u7531\u6570\u7EC4\u5B9E\u73B0\u7684\uFF0C\u652F\u6301\u968F\u673A\u5B58\u53D6\uFF0C\u4E5F\u5C31\u662F\u53EF\u4EE5\u901A\u8FC7\u4E0B\u6807\u76F4\u63A5\u5B58\u53D6\u5143\u7D20\uFF1B</li><li>\u4ECE\u5C3E\u90E8\u63D2\u5165\u548C\u5220\u9664\u5143\u7D20\u4F1A\u6BD4\u8F83\u5FEB\u6377\uFF0C\u4ECE\u4E2D\u95F4\u63D2\u5165\u548C\u5220\u9664\u5143\u7D20\u4F1A\u6BD4\u8F83\u4F4E\u6548\uFF0C\u56E0\u4E3A\u6D89\u53CA\u5230\u6570\u7EC4\u5143\u7D20\u7684\u590D\u5236\u548C\u79FB\u52A8\uFF1B</li><li>\u5982\u679C\u5185\u90E8\u6570\u7EC4\u7684\u5BB9\u91CF\u4E0D\u8DB3\u65F6\u4F1A\u81EA\u52A8\u6269\u5BB9\uFF0C\u56E0\u6B64\u5F53\u5143\u7D20\u975E\u5E38\u5E9E\u5927\u7684\u65F6\u5019\uFF0C\u6548\u7387\u4F1A\u6BD4\u8F83\u4F4E\u3002</li></ul><p><strong>2\uFF09LinkedList</strong></p><ul><li>LinkedList \u662F\u7531\u53CC\u5411\u94FE\u8868\u5B9E\u73B0\u7684\uFF0C\u4E0D\u652F\u6301\u968F\u673A\u5B58\u53D6\uFF0C\u53EA\u80FD\u4ECE\u4E00\u7AEF\u5F00\u59CB\u904D\u5386\uFF0C\u76F4\u5230\u627E\u5230\u9700\u8981\u7684\u5143\u7D20\u540E\u8FD4\u56DE\uFF1B</li><li>\u4EFB\u610F\u4F4D\u7F6E\u63D2\u5165\u548C\u5220\u9664\u5143\u7D20\u90FD\u5F88\u65B9\u4FBF\uFF0C\u56E0\u4E3A\u53EA\u9700\u8981\u6539\u53D8\u524D\u4E00\u4E2A\u8282\u70B9\u548C\u540E\u4E00\u4E2A\u8282\u70B9\u7684\u5F15\u7528\u5373\u53EF\uFF0C\u4E0D\u50CF ArrayList \u90A3\u6837\u9700\u8981\u590D\u5236\u548C\u79FB\u52A8\u6570\u7EC4\u5143\u7D20\uFF1B</li><li>\u56E0\u4E3A\u6BCF\u4E2A\u5143\u7D20\u90FD\u5B58\u50A8\u4E86\u524D\u4E00\u4E2A\u548C\u540E\u4E00\u4E2A\u8282\u70B9\u7684\u5F15\u7528\uFF0C\u6240\u4EE5\u76F8\u5BF9\u6765\u8BF4\uFF0C\u5360\u7528\u7684\u5185\u5B58\u7A7A\u95F4\u4F1A\u6BD4 ArrayList \u591A\u4E00\u4E9B\u3002</li></ul><p><strong>3\uFF09Vector \u548C Stack</strong></p><p>List \u7684\u5B9E\u73B0\u7C7B\u8FD8\u6709\u4E00\u4E2A Vector\uFF0C\u662F\u4E00\u4E2A\u5143\u8001\u7EA7\u7684\u7C7B\uFF0C\u6BD4 ArrayList \u51FA\u73B0\u5F97\u66F4\u65E9\u3002ArrayList \u548C Vector \u975E\u5E38\u76F8\u4F3C\uFF0C\u53EA\u4E0D\u8FC7 Vector \u662F\u7EBF\u7A0B\u5B89\u5168\u7684\uFF0C\u50CF get\u3001set\u3001add \u8FD9\u4E9B\u65B9\u6CD5\u90FD\u52A0\u4E86 <code>synchronized</code> \u5173\u952E\u5B57\uFF0C\u5C31\u5BFC\u81F4\u6267\u884C\u6267\u884C\u6548\u7387\u4F1A\u6BD4\u8F83\u4F4E\uFF0C\u6240\u4EE5\u73B0\u5728\u5DF2\u7ECF\u5F88\u5C11\u7528\u4E86\u3002</p><p>\u66F4\u597D\u7684\u9009\u62E9\u662F\u5E76\u53D1\u5305\u4E0B\u7684 CopyOnWriteArrayList\u3002</p><p>Stack \u662F Vector \u7684\u4E00\u4E2A\u5B50\u7C7B\uFF0C\u672C\u8D28\u4E0A\u4E5F\u662F\u7531\u52A8\u6001\u6570\u7EC4\u5B9E\u73B0\u7684\uFF0C\u53EA\u4E0D\u8FC7\u8FD8\u5B9E\u73B0\u4E86\u5148\u8FDB\u540E\u51FA\u7684\u529F\u80FD\uFF08\u5728 get\u3001set\u3001add \u65B9\u6CD5\u7684\u57FA\u7840\u4E0A\u8FFD\u52A0\u4E86 pop\u3001peek \u7B49\u65B9\u6CD5\uFF09\uFF0C\u6240\u4EE5\u53EB\u6808\u3002</p><p>\u4E0D\u8FC7\uFF0C\u7531\u4E8E Stack \u6267\u884C\u6548\u7387\u6BD4\u8F83\u4F4E\uFF08\u65B9\u6CD5\u4E0A\u540C\u6837\u52A0\u4E86 synchronized \u5173\u952E\u5B57\uFF09\uFF0C\u5C31\u88AB\u53CC\u7AEF\u961F\u5217 ArrayDeque \u53D6\u4EE3\u4E86\u3002</p><h3 id="_02\u3001set" tabindex="-1"><a class="header-anchor" href="#_02\u3001set" aria-hidden="true">#</a> 02\u3001Set</h3><blockquote><p>Set \u7684\u7279\u70B9\u662F\u5B58\u53D6\u65E0\u5E8F\uFF0C\u4E0D\u53EF\u4EE5\u5B58\u653E\u91CD\u590D\u7684\u5143\u7D20\uFF0C\u4E0D\u53EF\u4EE5\u7528\u4E0B\u6807\u5BF9\u5143\u7D20\u8FDB\u884C\u64CD\u4F5C\uFF0C\u548C List \u6709\u5F88\u591A\u4E0D\u540C</p></blockquote><p><strong>1\uFF09HashSet</strong></p><p>HashSet \u5176\u5B9E\u662F\u7531 HashMap \u5B9E\u73B0\u7684\uFF0C\u53EA\u4E0D\u8FC7\u503C\u7531\u4E00\u4E2A\u56FA\u5B9A\u7684 Object \u5BF9\u8C61\u586B\u5145\uFF0C\u800C\u952E\u7528\u4E8E\u64CD\u4F5C\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">HashSet</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">E</span><span class="token punctuation">&gt;</span></span>
     <span class="token keyword">extends</span> <span class="token class-name">AbstractSet</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">E</span><span class="token punctuation">&gt;</span></span>
     <span class="token keyword">implements</span> <span class="token class-name">Set</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">E</span><span class="token punctuation">&gt;</span></span><span class="token punctuation">,</span> <span class="token class-name">Cloneable</span><span class="token punctuation">,</span> <span class="token class-name"><span class="token namespace">java<span class="token punctuation">.</span>io<span class="token punctuation">.</span></span>Serializable</span>
 <span class="token punctuation">{</span>
diff --git a/dist/assets/gc.html.10f470a0.js b/dist/assets/gc.html.714d0f7b.js
similarity index 99%
rename from dist/assets/gc.html.10f470a0.js
rename to dist/assets/gc.html.714d0f7b.js
index 70c64a49..c841b81b 100644
--- a/dist/assets/gc.html.10f470a0.js
+++ b/dist/assets/gc.html.714d0f7b.js
@@ -1,4 +1,4 @@
-import{_ as a}from"./plugin-vue_export-helper.21dcd24c.js";import{o as n,c as s,e}from"./app.a0271b9c.js";const t={},p=e(`<h1 id="\u54B1\u4EEC\u4ECE\u5934\u5230\u5C3E\u8BF4\u4E00\u6B21java\u5783\u573E\u56DE\u6536" tabindex="-1"><a class="header-anchor" href="#\u54B1\u4EEC\u4ECE\u5934\u5230\u5C3E\u8BF4\u4E00\u6B21java\u5783\u573E\u56DE\u6536" aria-hidden="true">#</a> \u54B1\u4EEC\u4ECE\u5934\u5230\u5C3E\u8BF4\u4E00\u6B21Java\u5783\u573E\u56DE\u6536</h1><p>\u4E4B\u524D\u4E0A\u5B66\u7684\u65F6\u5019\u6709\u8FD9\u4E2A\u4E00\u4E2A\u6897\uFF0C\u8BF4\u5728\u98DF\u5802\u91CC\u5403\u996D\uFF0C\u5403\u5B8C\u628A\u9910\u76D8\u7AEF\u8D70\u6E05\u7406\u7684\uFF0C\u662F C++ \u7A0B\u5E8F\u5458\uFF0C\u5403\u5B8C\u76F4\u63A5\u5C31\u8D70\u7684\uFF0C\u662F Java \u7A0B\u5E8F\u5458\u3002</p><p>\u786E\u5B9E\uFF0C\u5728 Java \u7684\u4E16\u754C\u91CC\uFF0C\u4F3C\u4E4E\u6211\u4EEC\u4E0D\u7528\u5BF9\u5783\u573E\u56DE\u6536\u90A3\u4E48\u7684\u4E13\u6CE8\uFF0C\u5F88\u591A\u521D\u5B66\u8005\u4E0D\u61C2 GC\uFF0C\u4E5F\u4F9D\u7136\u80FD\u5199\u51FA\u4E00\u4E2A\u80FD\u7528\u751A\u81F3\u8FD8\u4E0D\u9519\u7684\u7A0B\u5E8F\u6216\u7CFB\u7EDF\u3002\u4F46\u5176\u5B9E\u8FD9\u5E76\u4E0D\u4EE3\u8868 Java \u7684 GC \u5C31\u4E0D\u91CD\u8981\u3002\u76F8\u53CD\uFF0C\u5B83\u662F\u90A3\u4E48\u7684\u91CD\u8981\u548C\u590D\u6742\uFF0C\u4EE5\u81F3\u4E8E\u51FA\u4E86\u95EE\u9898\uFF0C\u90A3\u4E9B\u521D\u5B66\u8005\u9664\u4E86\u6253\u5F00 GC \u65E5\u5FD7\uFF0C\u770B\u7740\u4E00\u58060101\u7684\u5929\u6587\uFF0C\u5565\u4E5F\u505A\u4E0D\u4E86\u3002</p><p>\u4ECA\u5929\u6211\u4EEC\u5C31\u4ECE\u5934\u5230\u5C3E\u5B8C\u6574\u5730\u804A\u4E00\u804A Java \u7684\u5783\u573E\u56DE\u6536\u3002</p><h3 id="\u4EC0\u4E48\u662F\u5783\u573E\u56DE\u6536" tabindex="-1"><a class="header-anchor" href="#\u4EC0\u4E48\u662F\u5783\u573E\u56DE\u6536" aria-hidden="true">#</a> \u4EC0\u4E48\u662F\u5783\u573E\u56DE\u6536</h3><ul><li>\u5783\u573E\u56DE\u6536\uFF08Garbage Collection\uFF0CGC\uFF09\uFF0C\u987E\u540D\u601D\u4E49\u5C31\u662F\u91CA\u653E\u5783\u573E\u5360\u7528\u7684\u7A7A\u95F4\uFF0C\u9632\u6B62\u5185\u5B58\u6CC4\u9732\u3002\u6709\u6548\u7684\u4F7F\u7528\u53EF\u4EE5\u4F7F\u7528\u7684\u5185\u5B58\uFF0C\u5BF9\u5185\u5B58\u5806\u4E2D\u5DF2\u7ECF\u6B7B\u4EA1\u7684\u6216\u8005\u957F\u65F6\u95F4\u6CA1\u6709\u4F7F\u7528\u7684\u5BF9\u8C61\u8FDB\u884C\u6E05\u9664\u548C\u56DE\u6536\u3002</li><li>Java \u8BED\u8A00\u51FA\u6765\u4E4B\u524D\uFF0C\u5927\u5BB6\u90FD\u5728\u62FC\u547D\u7684\u5199 C \u6216\u8005 C++ \u7684\u7A0B\u5E8F\uFF0C\u800C\u6B64\u65F6\u5B58\u5728\u4E00\u4E2A\u5F88\u5927\u7684\u77DB\u76FE\uFF0CC++ \u7B49\u8BED\u8A00\u521B\u5EFA\u5BF9\u8C61\u8981\u4E0D\u65AD\u7684\u53BB\u5F00\u8F9F\u7A7A\u95F4\uFF0C\u4E0D\u7528\u7684\u65F6\u5019\u53C8\u9700\u8981\u4E0D\u65AD\u7684\u53BB\u91CA\u653E\u63A7\u4EF6\uFF0C\u65E2\u8981\u5199\u6784\u9020\u51FD\u6570\uFF0C\u53C8\u8981\u5199\u6790\u6784\u51FD\u6570\uFF0C\u5F88\u591A\u65F6\u5019\u90FD\u5728\u91CD\u590D\u7684 allocated\uFF0C\u7136\u540E\u4E0D\u505C\u7684\u6790\u6784\u3002\u4E8E\u662F\uFF0C\u6709\u4EBA\u5C31\u63D0\u51FA\uFF0C\u80FD\u4E0D\u80FD\u5199\u4E00\u6BB5\u7A0B\u5E8F\u5B9E\u73B0\u8FD9\u5757\u529F\u80FD\uFF0C\u6BCF\u6B21\u521B\u5EFA\uFF0C\u91CA\u653E\u63A7\u4EF6\u7684\u65F6\u5019\u590D\u7528\u8FD9\u6BB5\u4EE3\u7801\uFF0C\u800C\u65E0\u9700\u91CD\u590D\u7684\u4E66\u5199\u5462\uFF1F</li><li>1960\u5E74\uFF0C\u57FA\u4E8E MIT \u7684 Lisp \u9996\u5148\u63D0\u51FA\u4E86\u5783\u573E\u56DE\u6536\u7684\u6982\u5FF5\uFF0C\u7528\u4E8E\u5904\u7406C\u8BED\u8A00\u7B49\u4E0D\u505C\u7684\u6790\u6784\u64CD\u4F5C\uFF0C\u800C\u8FD9\u65F6 Java \u8FD8\u6CA1\u6709\u51FA\u4E16\u5462\uFF01\u6240\u4EE5\u5B9E\u9645\u4E0A GC \u5E76\u4E0D\u662FJava\u7684\u4E13\u5229\uFF0CGC \u7684\u5386\u53F2\u8FDC\u8FDC\u5927\u4E8E Java \u7684\u5386\u53F2\uFF01</li></ul><h3 id="\u600E\u4E48\u5B9A\u4E49\u5783\u573E" tabindex="-1"><a class="header-anchor" href="#\u600E\u4E48\u5B9A\u4E49\u5783\u573E" aria-hidden="true">#</a> \u600E\u4E48\u5B9A\u4E49\u5783\u573E</h3><p>\u65E2\u7136\u6211\u4EEC\u8981\u505A\u5783\u573E\u56DE\u6536\uFF0C\u9996\u5148\u6211\u4EEC\u5F97\u641E\u6E05\u695A\u5783\u573E\u7684\u5B9A\u4E49\u662F\u4EC0\u4E48\uFF0C\u54EA\u4E9B\u5185\u5B58\u662F\u9700\u8981\u56DE\u6536\u7684\u3002</p><p><strong>\u5F15\u7528\u8BA1\u6570\u7B97\u6CD5</strong> \u5F15\u7528\u8BA1\u6570\u7B97\u6CD5\uFF08Reachability Counting\uFF09\u662F\u901A\u8FC7\u5728\u5BF9\u8C61\u5934\u4E2D\u5206\u914D\u4E00\u4E2A\u7A7A\u95F4\u6765\u4FDD\u5B58\u8BE5\u5BF9\u8C61\u88AB\u5F15\u7528\u7684\u6B21\u6570\uFF08Reference Count\uFF09\u3002\u5982\u679C\u8BE5\u5BF9\u8C61\u88AB\u5176\u5B83\u5BF9\u8C61\u5F15\u7528\uFF0C\u5219\u5B83\u7684\u5F15\u7528\u8BA1\u6570\u52A01\uFF0C\u5982\u679C\u5220\u9664\u5BF9\u8BE5\u5BF9\u8C61\u7684\u5F15\u7528\uFF0C\u90A3\u4E48\u5B83\u7684\u5F15\u7528\u8BA1\u6570\u5C31\u51CF1\uFF0C\u5F53\u8BE5\u5BF9\u8C61\u7684\u5F15\u7528\u8BA1\u6570\u4E3A0\u65F6\uFF0C\u90A3\u4E48\u8BE5\u5BF9\u8C61\u5C31\u4F1A\u88AB\u56DE\u6536\u3002</p><p><strong>String m = new String(&quot;jack&quot;);</strong></p><p>\u5148\u521B\u5EFA\u4E00\u4E2A\u5B57\u7B26\u4E32\uFF0C\u8FD9\u65F6\u5019&quot;jack&quot;\u6709\u4E00\u4E2A\u5F15\u7528\uFF0C\u5C31\u662F m\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/gc-691109d2-bee4-4a79-8da6-87c5fd233f54.jpg" alt=""></p><p>\u7136\u540E\u5C06 m \u8BBE\u7F6E\u4E3A null\uFF0C\u8FD9\u65F6\u5019&quot;jack&quot;\u7684\u5F15\u7528\u6B21\u6570\u5C31\u7B49\u4E8E0\u4E86\uFF0C\u5728\u5F15\u7528\u8BA1\u6570\u7B97\u6CD5\u4E2D\uFF0C\u610F\u5473\u7740\u8FD9\u5757\u5185\u5BB9\u5C31\u9700\u8981\u88AB\u56DE\u6536\u4E86\u3002</p><p><strong>m = null;</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/gc-74865618-4576-4f8b-baf3-17d6a71125b9.jpg" alt=""></p><p>\u5F15\u7528\u8BA1\u6570\u7B97\u6CD5\u662F\u5C06\u5783\u573E\u56DE\u6536\u5206\u644A\u5230\u6574\u4E2A\u5E94\u7528\u7A0B\u5E8F\u7684\u8FD0\u884C\u5F53\u4E2D\u4E86\uFF0C\u800C\u4E0D\u662F\u5728\u8FDB\u884C\u5783\u573E\u6536\u96C6\u65F6\uFF0C\u8981\u6302\u8D77\u6574\u4E2A\u5E94\u7528\u7684\u8FD0\u884C\uFF0C\u76F4\u5230\u5BF9\u5806\u4E2D\u6240\u6709\u5BF9\u8C61\u7684\u5904\u7406\u90FD\u7ED3\u675F\u3002\u56E0\u6B64\uFF0C\u91C7\u7528\u5F15\u7528\u8BA1\u6570\u7684\u5783\u573E\u6536\u96C6\u4E0D\u5C5E\u4E8E\u4E25\u683C\u610F\u4E49\u4E0A\u7684&quot;Stop-The-World&quot;\u7684\u5783\u573E\u6536\u96C6\u673A\u5236\u3002</p><p>\u770B\u4F3C\u5F88\u7F8E\u597D\uFF0C\u4F46\u6211\u4EEC\u77E5\u9053JVM\u7684\u5783\u573E\u56DE\u6536\u5C31\u662F&quot;Stop-The-World&quot;\u7684\uFF0C\u90A3\u662F\u4EC0\u4E48\u539F\u56E0\u5BFC\u81F4\u6211\u4EEC\u6700\u7EC8\u653E\u5F03\u4E86\u5F15\u7528\u8BA1\u6570\u7B97\u6CD5\u5462\uFF1F\u770B\u4E0B\u9762\u7684\u4F8B\u5B50\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">ReferenceCountingGC</span> <span class="token punctuation">{</span>
+import{_ as a}from"./plugin-vue_export-helper.21dcd24c.js";import{o as n,c as s,e}from"./app.615e41d8.js";const t={},p=e(`<h1 id="\u54B1\u4EEC\u4ECE\u5934\u5230\u5C3E\u8BF4\u4E00\u6B21java\u5783\u573E\u56DE\u6536" tabindex="-1"><a class="header-anchor" href="#\u54B1\u4EEC\u4ECE\u5934\u5230\u5C3E\u8BF4\u4E00\u6B21java\u5783\u573E\u56DE\u6536" aria-hidden="true">#</a> \u54B1\u4EEC\u4ECE\u5934\u5230\u5C3E\u8BF4\u4E00\u6B21Java\u5783\u573E\u56DE\u6536</h1><p>\u4E4B\u524D\u4E0A\u5B66\u7684\u65F6\u5019\u6709\u8FD9\u4E2A\u4E00\u4E2A\u6897\uFF0C\u8BF4\u5728\u98DF\u5802\u91CC\u5403\u996D\uFF0C\u5403\u5B8C\u628A\u9910\u76D8\u7AEF\u8D70\u6E05\u7406\u7684\uFF0C\u662F C++ \u7A0B\u5E8F\u5458\uFF0C\u5403\u5B8C\u76F4\u63A5\u5C31\u8D70\u7684\uFF0C\u662F Java \u7A0B\u5E8F\u5458\u3002</p><p>\u786E\u5B9E\uFF0C\u5728 Java \u7684\u4E16\u754C\u91CC\uFF0C\u4F3C\u4E4E\u6211\u4EEC\u4E0D\u7528\u5BF9\u5783\u573E\u56DE\u6536\u90A3\u4E48\u7684\u4E13\u6CE8\uFF0C\u5F88\u591A\u521D\u5B66\u8005\u4E0D\u61C2 GC\uFF0C\u4E5F\u4F9D\u7136\u80FD\u5199\u51FA\u4E00\u4E2A\u80FD\u7528\u751A\u81F3\u8FD8\u4E0D\u9519\u7684\u7A0B\u5E8F\u6216\u7CFB\u7EDF\u3002\u4F46\u5176\u5B9E\u8FD9\u5E76\u4E0D\u4EE3\u8868 Java \u7684 GC \u5C31\u4E0D\u91CD\u8981\u3002\u76F8\u53CD\uFF0C\u5B83\u662F\u90A3\u4E48\u7684\u91CD\u8981\u548C\u590D\u6742\uFF0C\u4EE5\u81F3\u4E8E\u51FA\u4E86\u95EE\u9898\uFF0C\u90A3\u4E9B\u521D\u5B66\u8005\u9664\u4E86\u6253\u5F00 GC \u65E5\u5FD7\uFF0C\u770B\u7740\u4E00\u58060101\u7684\u5929\u6587\uFF0C\u5565\u4E5F\u505A\u4E0D\u4E86\u3002</p><p>\u4ECA\u5929\u6211\u4EEC\u5C31\u4ECE\u5934\u5230\u5C3E\u5B8C\u6574\u5730\u804A\u4E00\u804A Java \u7684\u5783\u573E\u56DE\u6536\u3002</p><h3 id="\u4EC0\u4E48\u662F\u5783\u573E\u56DE\u6536" tabindex="-1"><a class="header-anchor" href="#\u4EC0\u4E48\u662F\u5783\u573E\u56DE\u6536" aria-hidden="true">#</a> \u4EC0\u4E48\u662F\u5783\u573E\u56DE\u6536</h3><ul><li>\u5783\u573E\u56DE\u6536\uFF08Garbage Collection\uFF0CGC\uFF09\uFF0C\u987E\u540D\u601D\u4E49\u5C31\u662F\u91CA\u653E\u5783\u573E\u5360\u7528\u7684\u7A7A\u95F4\uFF0C\u9632\u6B62\u5185\u5B58\u6CC4\u9732\u3002\u6709\u6548\u7684\u4F7F\u7528\u53EF\u4EE5\u4F7F\u7528\u7684\u5185\u5B58\uFF0C\u5BF9\u5185\u5B58\u5806\u4E2D\u5DF2\u7ECF\u6B7B\u4EA1\u7684\u6216\u8005\u957F\u65F6\u95F4\u6CA1\u6709\u4F7F\u7528\u7684\u5BF9\u8C61\u8FDB\u884C\u6E05\u9664\u548C\u56DE\u6536\u3002</li><li>Java \u8BED\u8A00\u51FA\u6765\u4E4B\u524D\uFF0C\u5927\u5BB6\u90FD\u5728\u62FC\u547D\u7684\u5199 C \u6216\u8005 C++ \u7684\u7A0B\u5E8F\uFF0C\u800C\u6B64\u65F6\u5B58\u5728\u4E00\u4E2A\u5F88\u5927\u7684\u77DB\u76FE\uFF0CC++ \u7B49\u8BED\u8A00\u521B\u5EFA\u5BF9\u8C61\u8981\u4E0D\u65AD\u7684\u53BB\u5F00\u8F9F\u7A7A\u95F4\uFF0C\u4E0D\u7528\u7684\u65F6\u5019\u53C8\u9700\u8981\u4E0D\u65AD\u7684\u53BB\u91CA\u653E\u63A7\u4EF6\uFF0C\u65E2\u8981\u5199\u6784\u9020\u51FD\u6570\uFF0C\u53C8\u8981\u5199\u6790\u6784\u51FD\u6570\uFF0C\u5F88\u591A\u65F6\u5019\u90FD\u5728\u91CD\u590D\u7684 allocated\uFF0C\u7136\u540E\u4E0D\u505C\u7684\u6790\u6784\u3002\u4E8E\u662F\uFF0C\u6709\u4EBA\u5C31\u63D0\u51FA\uFF0C\u80FD\u4E0D\u80FD\u5199\u4E00\u6BB5\u7A0B\u5E8F\u5B9E\u73B0\u8FD9\u5757\u529F\u80FD\uFF0C\u6BCF\u6B21\u521B\u5EFA\uFF0C\u91CA\u653E\u63A7\u4EF6\u7684\u65F6\u5019\u590D\u7528\u8FD9\u6BB5\u4EE3\u7801\uFF0C\u800C\u65E0\u9700\u91CD\u590D\u7684\u4E66\u5199\u5462\uFF1F</li><li>1960\u5E74\uFF0C\u57FA\u4E8E MIT \u7684 Lisp \u9996\u5148\u63D0\u51FA\u4E86\u5783\u573E\u56DE\u6536\u7684\u6982\u5FF5\uFF0C\u7528\u4E8E\u5904\u7406C\u8BED\u8A00\u7B49\u4E0D\u505C\u7684\u6790\u6784\u64CD\u4F5C\uFF0C\u800C\u8FD9\u65F6 Java \u8FD8\u6CA1\u6709\u51FA\u4E16\u5462\uFF01\u6240\u4EE5\u5B9E\u9645\u4E0A GC \u5E76\u4E0D\u662FJava\u7684\u4E13\u5229\uFF0CGC \u7684\u5386\u53F2\u8FDC\u8FDC\u5927\u4E8E Java \u7684\u5386\u53F2\uFF01</li></ul><h3 id="\u600E\u4E48\u5B9A\u4E49\u5783\u573E" tabindex="-1"><a class="header-anchor" href="#\u600E\u4E48\u5B9A\u4E49\u5783\u573E" aria-hidden="true">#</a> \u600E\u4E48\u5B9A\u4E49\u5783\u573E</h3><p>\u65E2\u7136\u6211\u4EEC\u8981\u505A\u5783\u573E\u56DE\u6536\uFF0C\u9996\u5148\u6211\u4EEC\u5F97\u641E\u6E05\u695A\u5783\u573E\u7684\u5B9A\u4E49\u662F\u4EC0\u4E48\uFF0C\u54EA\u4E9B\u5185\u5B58\u662F\u9700\u8981\u56DE\u6536\u7684\u3002</p><p><strong>\u5F15\u7528\u8BA1\u6570\u7B97\u6CD5</strong> \u5F15\u7528\u8BA1\u6570\u7B97\u6CD5\uFF08Reachability Counting\uFF09\u662F\u901A\u8FC7\u5728\u5BF9\u8C61\u5934\u4E2D\u5206\u914D\u4E00\u4E2A\u7A7A\u95F4\u6765\u4FDD\u5B58\u8BE5\u5BF9\u8C61\u88AB\u5F15\u7528\u7684\u6B21\u6570\uFF08Reference Count\uFF09\u3002\u5982\u679C\u8BE5\u5BF9\u8C61\u88AB\u5176\u5B83\u5BF9\u8C61\u5F15\u7528\uFF0C\u5219\u5B83\u7684\u5F15\u7528\u8BA1\u6570\u52A01\uFF0C\u5982\u679C\u5220\u9664\u5BF9\u8BE5\u5BF9\u8C61\u7684\u5F15\u7528\uFF0C\u90A3\u4E48\u5B83\u7684\u5F15\u7528\u8BA1\u6570\u5C31\u51CF1\uFF0C\u5F53\u8BE5\u5BF9\u8C61\u7684\u5F15\u7528\u8BA1\u6570\u4E3A0\u65F6\uFF0C\u90A3\u4E48\u8BE5\u5BF9\u8C61\u5C31\u4F1A\u88AB\u56DE\u6536\u3002</p><p><strong>String m = new String(&quot;jack&quot;);</strong></p><p>\u5148\u521B\u5EFA\u4E00\u4E2A\u5B57\u7B26\u4E32\uFF0C\u8FD9\u65F6\u5019&quot;jack&quot;\u6709\u4E00\u4E2A\u5F15\u7528\uFF0C\u5C31\u662F m\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/gc-691109d2-bee4-4a79-8da6-87c5fd233f54.jpg" alt=""></p><p>\u7136\u540E\u5C06 m \u8BBE\u7F6E\u4E3A null\uFF0C\u8FD9\u65F6\u5019&quot;jack&quot;\u7684\u5F15\u7528\u6B21\u6570\u5C31\u7B49\u4E8E0\u4E86\uFF0C\u5728\u5F15\u7528\u8BA1\u6570\u7B97\u6CD5\u4E2D\uFF0C\u610F\u5473\u7740\u8FD9\u5757\u5185\u5BB9\u5C31\u9700\u8981\u88AB\u56DE\u6536\u4E86\u3002</p><p><strong>m = null;</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/gc-74865618-4576-4f8b-baf3-17d6a71125b9.jpg" alt=""></p><p>\u5F15\u7528\u8BA1\u6570\u7B97\u6CD5\u662F\u5C06\u5783\u573E\u56DE\u6536\u5206\u644A\u5230\u6574\u4E2A\u5E94\u7528\u7A0B\u5E8F\u7684\u8FD0\u884C\u5F53\u4E2D\u4E86\uFF0C\u800C\u4E0D\u662F\u5728\u8FDB\u884C\u5783\u573E\u6536\u96C6\u65F6\uFF0C\u8981\u6302\u8D77\u6574\u4E2A\u5E94\u7528\u7684\u8FD0\u884C\uFF0C\u76F4\u5230\u5BF9\u5806\u4E2D\u6240\u6709\u5BF9\u8C61\u7684\u5904\u7406\u90FD\u7ED3\u675F\u3002\u56E0\u6B64\uFF0C\u91C7\u7528\u5F15\u7528\u8BA1\u6570\u7684\u5783\u573E\u6536\u96C6\u4E0D\u5C5E\u4E8E\u4E25\u683C\u610F\u4E49\u4E0A\u7684&quot;Stop-The-World&quot;\u7684\u5783\u573E\u6536\u96C6\u673A\u5236\u3002</p><p>\u770B\u4F3C\u5F88\u7F8E\u597D\uFF0C\u4F46\u6211\u4EEC\u77E5\u9053JVM\u7684\u5783\u573E\u56DE\u6536\u5C31\u662F&quot;Stop-The-World&quot;\u7684\uFF0C\u90A3\u662F\u4EC0\u4E48\u539F\u56E0\u5BFC\u81F4\u6211\u4EEC\u6700\u7EC8\u653E\u5F03\u4E86\u5F15\u7528\u8BA1\u6570\u7B97\u6CD5\u5462\uFF1F\u770B\u4E0B\u9762\u7684\u4F8B\u5B50\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">ReferenceCountingGC</span> <span class="token punctuation">{</span>
 
 <span class="token keyword">public</span> <span class="token class-name">Object</span> instance<span class="token punctuation">;</span>
 
diff --git a/dist/assets/generic.html.47649dca.js b/dist/assets/generic.html.df9c6eb8.js
similarity index 99%
rename from dist/assets/generic.html.47649dca.js
rename to dist/assets/generic.html.df9c6eb8.js
index 5cb979ab..26c00ee7 100644
--- a/dist/assets/generic.html.47649dca.js
+++ b/dist/assets/generic.html.df9c6eb8.js
@@ -1,4 +1,4 @@
-import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e as p}from"./app.a0271b9c.js";const t={},e=p(`<h1 id="\u6DF1\u5165\u7406\u89E3java\u6CDB\u578B" tabindex="-1"><a class="header-anchor" href="#\u6DF1\u5165\u7406\u89E3java\u6CDB\u578B" aria-hidden="true">#</a> \u6DF1\u5165\u7406\u89E3Java\u6CDB\u578B</h1><p>\u201C\u4E8C\u54E5\uFF0C\u4E3A\u4EC0\u4E48\u8981\u8BBE\u8BA1\u6CDB\u578B\u554A\uFF1F\u201D\u4E09\u59B9\u5F00\u95E8\u89C1\u5C71\u5730\u95EE\u3002</p><p>\u201C\u4E09\u59B9\u554A\uFF0C\u542C\u54E5\u6162\u6162\u7ED9\u4F60\u8BB2\u554A\u3002\u201D\u6211\u8BF4\u3002</p><p>Java \u5728 1.5 \u65F6\u589E\u52A0\u4E86\u6CDB\u578B\u673A\u5236\uFF0C\u636E\u8BF4\u4E13\u5BB6\u4EEC\u4E3A\u6B64\u82B1\u8D39\u4E86 5 \u5E74\u5DE6\u53F3\u7684\u65F6\u95F4\uFF08\u542C\u8D77\u6765\u5F88\u4E0D\u5BB9\u6613\uFF09\u3002\u6709\u4E86\u6CDB\u578B\u4E4B\u540E\uFF0C\u5C24\u5176\u662F\u5BF9\u96C6\u5408\u7C7B\u7684\u4F7F\u7528\uFF0C\u5C31\u53D8\u5F97\u66F4\u89C4\u8303\u4E86\u3002</p><p>\u770B\u4E0B\u9762\u8FD9\u6BB5\u7B80\u5355\u7684\u4EE3\u7801\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">ArrayList</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">String</span><span class="token punctuation">&gt;</span></span> list <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">ArrayList</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">String</span><span class="token punctuation">&gt;</span></span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
+import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e as p}from"./app.615e41d8.js";const t={},e=p(`<h1 id="\u6DF1\u5165\u7406\u89E3java\u6CDB\u578B" tabindex="-1"><a class="header-anchor" href="#\u6DF1\u5165\u7406\u89E3java\u6CDB\u578B" aria-hidden="true">#</a> \u6DF1\u5165\u7406\u89E3Java\u6CDB\u578B</h1><p>\u201C\u4E8C\u54E5\uFF0C\u4E3A\u4EC0\u4E48\u8981\u8BBE\u8BA1\u6CDB\u578B\u554A\uFF1F\u201D\u4E09\u59B9\u5F00\u95E8\u89C1\u5C71\u5730\u95EE\u3002</p><p>\u201C\u4E09\u59B9\u554A\uFF0C\u542C\u54E5\u6162\u6162\u7ED9\u4F60\u8BB2\u554A\u3002\u201D\u6211\u8BF4\u3002</p><p>Java \u5728 1.5 \u65F6\u589E\u52A0\u4E86\u6CDB\u578B\u673A\u5236\uFF0C\u636E\u8BF4\u4E13\u5BB6\u4EEC\u4E3A\u6B64\u82B1\u8D39\u4E86 5 \u5E74\u5DE6\u53F3\u7684\u65F6\u95F4\uFF08\u542C\u8D77\u6765\u5F88\u4E0D\u5BB9\u6613\uFF09\u3002\u6709\u4E86\u6CDB\u578B\u4E4B\u540E\uFF0C\u5C24\u5176\u662F\u5BF9\u96C6\u5408\u7C7B\u7684\u4F7F\u7528\uFF0C\u5C31\u53D8\u5F97\u66F4\u89C4\u8303\u4E86\u3002</p><p>\u770B\u4E0B\u9762\u8FD9\u6BB5\u7B80\u5355\u7684\u4EE3\u7801\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">ArrayList</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">String</span><span class="token punctuation">&gt;</span></span> list <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">ArrayList</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">String</span><span class="token punctuation">&gt;</span></span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 list<span class="token punctuation">.</span><span class="token function">add</span><span class="token punctuation">(</span><span class="token string">&quot;\u6C89\u9ED8\u738B\u4E8C&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 <span class="token class-name">String</span> str <span class="token operator">=</span> list<span class="token punctuation">.</span><span class="token function">get</span><span class="token punctuation">(</span><span class="token number">0</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>\u201C\u4E09\u59B9\uFF0C\u4F60\u80FD\u60F3\u8C61\u5230\u5728\u6CA1\u6709\u6CDB\u578B\u4E4B\u524D\u8BE5\u600E\u4E48\u529E\u5417\uFF1F\u201D</p><p>\u201C\u55EF\uFF0C\u60F3\u4E0D\u5230\uFF0C\u8FD8\u662F\u4E8C\u54E5\u4F60\u8BF4\u5427\u3002\u201D</p><p>\u55EF\uFF0C\u6211\u4EEC\u53EF\u4EE5\u4F7F\u7528 Object \u6570\u7EC4\u6765\u8BBE\u8BA1 <code>Arraylist</code> \u7C7B\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">class</span> <span class="token class-name">Arraylist</span> <span class="token punctuation">{</span>
diff --git a/dist/assets/git-qiyuan.html.1b827703.js b/dist/assets/git-qiyuan.html.085fb4bc.js
similarity index 99%
rename from dist/assets/git-qiyuan.html.1b827703.js
rename to dist/assets/git-qiyuan.html.085fb4bc.js
index 5eeb9886..c0ac4ba8 100644
--- a/dist/assets/git-qiyuan.html.1b827703.js
+++ b/dist/assets/git-qiyuan.html.085fb4bc.js
@@ -1,4 +1,4 @@
-import{_ as s}from"./plugin-vue_export-helper.21dcd24c.js";import{r as d,o as r,c as l,a as e,b as n,e as a,d as i}from"./app.a0271b9c.js";const c={},o=a('<h1 id="\u6211\u5728\u5DE5\u4F5C\u4E2D\u662F\u5982\u4F55\u4F7F\u7528-git-\u7684" tabindex="-1"><a class="header-anchor" href="#\u6211\u5728\u5DE5\u4F5C\u4E2D\u662F\u5982\u4F55\u4F7F\u7528-git-\u7684" aria-hidden="true">#</a> \u6211\u5728\u5DE5\u4F5C\u4E2D\u662F\u5982\u4F55\u4F7F\u7528 Git \u7684</h1><h2 id="\u4E00\u3001git-\u8D77\u6E90" tabindex="-1"><a class="header-anchor" href="#\u4E00\u3001git-\u8D77\u6E90" aria-hidden="true">#</a> \u4E00\u3001Git \u8D77\u6E90</h2><p>Git \u662F\u4E00\u4E2A\u5206\u5E03\u5F0F\u7248\u672C\u63A7\u5236\u7CFB\u7EDF\uFF0C\u7F14\u9020\u8005\u662F\u5927\u540D\u9F0E\u9F0E\u7684\u6797\u7EB3\u65AF\xB7\u6258\u74E6\u8332 (Linus Torvalds)\uFF0CGit \u6700\u521D\u7684\u76EE\u7684\u662F\u4E3A\u4E86\u80FD\u66F4\u597D\u7684\u7BA1\u7406 Linux \u5185\u6838\u6E90\u7801\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/git/git-qiyuan-01.png" alt=""></p><p>PS\uFF1A<strong>\u4E3A\u4E86\u80FD\u591F\u5E2E\u52A9\u66F4\u591A\u7684 Java \u7231\u597D\u8005\uFF0C\u5DF2\u5C06\u300AJava \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF\u300B\u5F00\u6E90\u5230\u4E86 GitHub\uFF08\u672C\u7BC7\u5DF2\u6536\u5F55\uFF09\u3002\u5982\u679C\u4F60\u4E5F\u559C\u6B22\u8FD9\u4E2A\u4E13\u680F\uFF0C\u89C9\u5F97\u6709\u5E2E\u52A9\u7684\u8BDD\uFF0C\u53EF\u4EE5\u53BB\u70B9\u4E2A star\uFF0C\u8FD9\u6837\u4E5F\u65B9\u4FBF\u4EE5\u540E\u8FDB\u884C\u66F4\u7CFB\u7EDF\u5316\u7684\u5B66\u4E60</strong>\uFF1A</p>',5),v={href:"https://github.com/itwanger/toBeBetterJavaer",target:"_blank",rel:"noopener noreferrer"},m=i("https://github.com/itwanger/toBeBetterJavaer"),p=a(`<p><em>\u6BCF\u5929\u770B\u7740 star \u6570\u7684\u4E0A\u6DA8\u6211\u5FC3\u91CC\u975E\u5E38\u7684\u5F00\u5FC3\uFF0C\u5E0C\u671B\u8D8A\u6765\u8D8A\u591A\u7684 Java \u7231\u597D\u8005\u80FD\u56E0\u4E3A\u8FD9\u4E2A\u5F00\u6E90\u9879\u76EE\u800C\u53D7\u76CA\uFF0C\u800C\u8D8A\u6765\u8D8A\u591A\u4EBA\u7684 star\uFF0C\u4E5F\u4F1A\u6FC0\u52B1\u6211\u7EE7\u7EED\u66F4\u65B0\u4E0B\u53BB</em>~</p><p>\u5927\u5BB6\u90FD\u77E5\u9053\uFF0CLinux \u5185\u6838\u662F\u5F00\u6E90\u7684\uFF0C\u53C2\u4E0E\u8005\u4F17\u591A\uFF0C\u5230\u76EE\u524D\u4E3A\u6B62\uFF0C\u5171\u6709\u4E24\u4E07\u591A\u540D\u5F00\u53D1\u8005\u7ED9 Linux Kernel \u63D0\u4EA4\u8FC7\u4EE3\u7801\u3002</p><p>\u4F46\u5728 1991 \u5E74\u5230 2002 \u5E74\u671F\u95F4\uFF0CLinus \u4F5C\u4E3A\u9879\u76EE\u7684\u7BA1\u7406\u5458\u5E76\u6CA1\u6709\u501F\u52A9\u4EFB\u4F55\u914D\u7F6E\u7BA1\u7406\u5DE5\u5177\uFF0C\u800C\u662F\u4EE5\u624B\u5DE5\u65B9\u5F0F\u901A\u8FC7 patch \u6765\u5408\u5E76\u5927\u5BB6\u63D0\u4EA4\u7684\u4EE3\u7801\u3002</p><p>\u5012\u4E0D\u662F\u8BF4 Linus \u559C\u6B22\u624B\u5DE5\u5904\u7406\uFF0C\u800C\u662F\u56E0\u4E3A\u4ED6\u5BF9\u4EE3\u7801\u7248\u672C\u7BA1\u7406\u5DE5\u5177\u975E\u5E38\u6311\u5254\uFF0C\u65E0\u8BBA\u662F\u5546\u7528\u7684 clearcase\uFF0C\u8FD8\u662F\u5F00\u6E90\u7684 CVS\u3001SVN \u90FD\u5165\u4E0D\u4E86\u4ED6\u7684\u6CD5\u773C\u3002</p><p>\u76F4\u5230 2002 \u5E74\uFF0CLinus \u624D\u76F8\u4E2D\u4E86\u4E00\u6B3E\u5206\u5E03\u5F0F\u7248\u672C\u63A7\u5236\u7CFB\u7EDF BitKeeper\uFF0C\u867D\u7136\u662F\u5546\u7528\u7684\uFF0C\u4F46 BitKeeper \u613F\u610F\u8BA9 Linux \u793E\u533A\u514D\u8D39\u4F7F\u7528\uFF0C\u8FD9\u8BA9 Linus \u975E\u5E38\u5F00\u5FC3\u548C\u6EE1\u610F\u3002</p><p>\u65F6\u95F4\u6765\u5230 2005 \u5E74\uFF0C\u7531\u4E8E BitKeeper \u63D0\u4F9B\u7684\u9ED8\u8BA4\u63A5\u53E3\u4E0D\u80FD\u6EE1\u8DB3 Linux \u793E\u533A\u7528\u6237\u7684\u5168\u90E8\u9700\u8981\uFF0C\u4E00\u4F4D\u5F00\u53D1\u8005\u5728\u672A\u7ECF\u5141\u8BB8\u7684\u60C5\u51B5\u4E0B\u53CD\u7F16\u8BD1\u4E86 BitKeeper \u5E76\u5229\u7528\u4E86\u672A\u516C\u5F00\u7684\u63A5\u53E3\uFF0C\u4E8E\u662F BitKeeper \u7684\u8457\u4F5C\u6743\u62E5\u6709\u8005\u62C9\u91CC\xB7\u9EA6\u6C83\u4F0A\u5C31\u6C14\u6124\u5730\u6536\u56DE\u4E86 Linux \u793E\u533A\u514D\u8D39\u4F7F\u7528\u7684\u6743\u529B\u3002</p><p>\u6CA1\u529E\u6CD5\uFF0CLinus \u53EA\u597D\u81EA\u5DF1\u786C\u7740\u5934\u76AE\u4E0A\u4E86\u3002\u4ED6\u5BF9\u65B0\u7684\u7248\u672C\u63A7\u5236\u7CFB\u7EDF\u5236\u8BA2\u4E86\u82E5\u5E72\u76EE\u6807\uFF1A</p><ul><li>\u901F\u5EA6</li><li>\u8BBE\u8BA1\u7B80\u5355</li><li>\u5141\u8BB8\u6210\u5343\u4E0A\u4E07\u4E2A\u5E76\u884C\u5F00\u53D1\u7684\u5206\u652F</li><li>\u5B8C\u5168\u5206\u5E03\u5F0F</li><li>\u6709\u80FD\u529B\u9AD8\u6548\u7BA1\u7406\u7C7B\u4F3C Linux \u5185\u6838\u4E00\u6837\u7684\u8D85\u5927\u89C4\u6A21\u9879\u76EE</li></ul><p>\u7ED3\u679C\uFF0C\u4EE4\u4EBA\u610F\u60F3\u4E0D\u5230\u7684\u662F\uFF0CLinus \u53EA\u7528\u4E86 10 \u5929\u65F6\u95F4\u5C31\u7528 C\u8BED\u8A00\u5B8C\u6210\u4E86\u7B2C\u4E00\u4E2A\u7248\u672C\uFF0C\u55EF\u3002\u3002\u795E\u5C31\u662F\u795E\u3002\u5E76\u4E14\u7ED9\u8FD9\u4E2A\u7248\u672C\u8D77\u4E86\u4E00\u4E2A\u7565\u5E26\u5632\u8BBD\u610F\u5473\u7684\u540D\u5B57\u2014\u2014Git\uFF08\u5728\u82F1\u5F0F\u82F1\u8BED\u4FDA\u8BED\u4E2D\u8868\u793A\u201C\u4E0D\u6109\u5FEB\u7684\u4EBA\u201D\uFF09\u3002</p><p>\u6E90\u4EE3\u7801\u7684\u81EA\u8FF0\u6587\u4EF6\u6709\u8FDB\u4E00\u6B65\u7684\u9610\u8FF0\uFF1A</p><blockquote><p>The name &quot;git&quot; was given by Linus Torvalds when he wrote the very first version. He described the tool as &quot;the stupid content tracker&quot; and the name as (depending on your way)</p></blockquote><p>\u4ECE Git \u7684\u8BBE\u8BA1\u4E0A\u6765\u770B\uFF0C\u6709\u4E24\u79CD\u547D\u4EE4\uFF1A\u5206\u522B\u662F\u5E95\u5C42\u547D\u4EE4(Plumbing commands)\u548C\u9AD8\u5C42\u547D\u4EE4(Porcelain commands)\u3002\u4E00\u5F00\u59CB\uFF0CLinus \u53EA\u8BBE\u8BA1\u4E86\u4E00\u4E9B\u7ED9\u5F00\u6E90\u793E\u533A\u7684\u9ED1\u5BA2\u4EEC\u4F7F\u7528\u7684\u7B26\u5408 Unix KISS \u539F\u5219\u7684\u547D\u4EE4\uFF0C\u56E0\u4E3A\u9ED1\u5BA2\u4EEC\u672C\u8EAB\u5C31\u662F\u52A8\u624B\u9AD8\u624B\uFF0C\u6C34\u7BA1\u574F\u4E86\u5C31\u64B8\u8D77\u8896\u5B50\u53BB\u4FEE\u7406\uFF0C\u56E0\u6B64\u8FD9\u4E9B\u547D\u4EE4\u88AB\u79F0\u4E3A plumbing commands\u3002</p><p>Linus \u5728\u63D0\u4EA4\u4E86\u7B2C\u4E00\u4E2A git commit \u540E\uFF0C\u5C31\u5411\u793E\u533A\u53D1\u5E03\u4E86 git \u5DE5\u5177\u3002\u5F53\u65F6\uFF0C\u793E\u533A\u4E2D\u6709\u4F4D\u53EB Junio Hamano \u7684\u5F00\u53D1\u8005\u89C9\u5F97\u8FD9\u4E2A\u5DE5\u5177\u5F88\u6709\u610F\u601D\uFF0C\u4FBF\u4E0B\u8F7D\u4E86\u4EE3\u7801\uFF0C\u7ED3\u679C\u53D1\u73B0\u4E00\u5171\u624D 1244 \u884C\u4EE3\u7801\uFF0C\u8FD9\u66F4\u4EE4\u4ED6\u60CA\u5947\uFF0C\u4E5F\u5F15\u53D1\u4E86\u6781\u5927\u7684\u5174\u8DA3\u3002Junio \u5728\u90AE\u4EF6\u5217\u8868\u4E0E Linus \u4EA4\u6D41\u5E76\u5E2E\u52A9\u589E\u52A0\u4E86 merge \u7B49\u529F\u80FD\uFF0C\u800C\u540E\u6301\u7EED\u6253\u78E8 git\uFF0C\u6700\u540E Junio \u5B8C\u5168\u63A5\u624B\u4E86 Git \u7684\u7EF4\u62A4\u5DE5\u4F5C\uFF0CLinus \u5219\u56DE\u53BB\u7EE7\u7EED\u7EF4\u62A4 Linux Kernel \u9879\u76EE\u3002</p><p>Junio Hamano \u89C9\u5F97 Linus \u8BBE\u8BA1\u7684\u8FD9\u4E9B\u547D\u4EE4\u5BF9\u4E8E\u666E\u901A\u7528\u6237\u4E0D\u592A\u53CB\u597D\uFF0C\u56E0\u6B64\u5728\u6B64\u4E4B\u4E0A\uFF0C\u5C01\u88C5\u4E86\u66F4\u6613\u4E8E\u4F7F\u7528\u3001\u63A5\u53E3\u66F4\u7CBE\u7F8E\u7684\u9AD8\u5C42\u547D\u4EE4\uFF0C\u4E5F\u5C31\u662F\u6211\u4EEC\u4ECA\u5929\u6BCF\u5929\u4F7F\u7528\u7684 git add, git commit \u4E4B\u7C7B\u3002Git add \u5C31\u662F\u5C01\u88C5\u4E86 update-cache \u547D\u4EE4\uFF0C\u800C git commit \u5C31\u662F\u5C01\u88C5\u4E86 write-tree, commit-tree \u547D\u4EE4\u3002</p><p>\u5982\u679C\u9009\u5386\u53F2\u4E0A\u6700\u4F1F\u5927\u7684\u4E00\u6B21 Git \u4EE3\u7801\u63D0\u4EA4\uFF0C\u90A3\u4E00\u5B9A\u662F\u8FD9 Git \u5DE5\u5177\u9879\u76EE\u672C\u8EAB\u7684\u7B2C\u4E00\u6B21\u4EE3\u7801\u63D0\u4EA4\u3002\u8FD9\u6B21\u4EE3\u7801\u63D0\u4EA4\u65E0\u7591\u662F\u5F00\u521B\u6027\u7684\uFF0C<strong>\u5982\u679C\u8BF4 Linux \u9879\u76EE\u4FC3\u6210\u4E86\u5F00\u6E90\u8F6F\u4EF6\u7684\u6210\u529F\u5E76\u6539\u5199\u4E86\u8F6F\u4EF6\u884C\u4E1A\u7684\u683C\u5C40\uFF0C\u90A3\u4E48 Git \u5219\u662F\u6539\u53D8\u4E86\u5168\u4E16\u754C\u5F00\u53D1\u8005\u7684\u5DE5\u4F5C\u65B9\u5F0F\u548C\u5199\u4F5C\u65B9\u5F0F</strong>\u3002</p><p>\u5982\u4ECA\uFF0CGit \u5DF2\u7ECF\u6210\u4E3A\u5168\u7403\u8F6F\u4EF6\u5F00\u53D1\u8005\u7684\u6807\u914D\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/git/git-qiyuan-02.png" alt=""></p><p>\u539F\u672C\u7684 Git \u53EA\u9002\u7528\u4E8E Unix/Linux \u5E73\u53F0\uFF0C\u4F46\u968F\u7740 Cygwin\u3001msysGit \u73AF\u5883\u7684\u6210\u719F\uFF0C\u4EE5\u53CA TortoiseGit \u8FD9\u6837\u6613\u7528\u7684GUI\u5DE5\u5177\uFF0CGit \u5728 Windows \u5E73\u53F0\u4E0B\u4E5F\u9010\u6E10\u6210\u719F\u3002</p><blockquote><p>PS1\uFF1ACygwin \u7684\u4E3B\u8981\u76EE\u7684\u662F\u901A\u8FC7\u91CD\u65B0\u7F16\u8BD1\uFF0C\u5C06 POSIX \u7CFB\u7EDF\uFF08\u4F8B\u5982Linux\u3001BSD\uFF0C\u4EE5\u53CA\u5176\u4ED6Unix\u7CFB\u7EDF\uFF09\u4E0A\u7684\u8F6F\u4EF6\u79FB\u690D\u5230Windows\u4E0A\u3002</p></blockquote><blockquote><p>PS2\uFF1AmsysGit \u524D\u9762\u7684 4 \u4E2A\u5B57\u5E55\u6765\u6E90\u4E8E MSYS \u9879\u76EE\uFF0C\u800C MSYS \u53C8\u6E90\u4E8E MinGW\uFF08Minimalist GNU for Windows\uFF0C\u6700\u7B80GNU\u5DE5\u5177\u96C6\uFF09\uFF0C\u901A\u8FC7\u589E\u52A0\u4E86\u4E00\u4E2A\u7531bash\u63D0\u4F9B\u7684shell\u73AF\u5883\u4EE5\u53CA\u5176\u4ED6\u76F8\u5173\u5DE5\u5177\u8F6F\u4EF6\uFF0C\u7EC4\u6210\u4E86\u4E00\u4E2A\u6700\u7B80\u7CFB\u7EDF\uFF08Minimal System\uFF09\uFF0C\u5229\u7528MinGW\u63D0\u4F9B\u7684\u5DE5\u5177\uFF0C\u4EE5\u53CAGit\u9488\u5BF9MinGW\u7684\u4E00\u4E2A\u5206\u652F\u7248\u672C\uFF0C\u53EF\u4EE5\u5728Windows\u5E73\u53F0\u4E3AGit\u7F16\u8BD1\u51FA\u4E00\u4E2A\u539F\u751F\u5E94\u7528\uFF0C\u7ED3\u5408MSYS\u5C31\u7EC4\u6210\u4E86msysGit\u3002</p></blockquote><p>Git \u548C\u4F20\u7EDF\u7684\u7248\u672C\u63A7\u5236\u5DE5\u5177 CVS\u3001SVN \u6709\u4E0D\u5C0F\u7684\u533A\u522B\uFF0C\u524D\u8005\u5173\u5FC3\u7684\u662F\u6587\u4EF6\u7684\u6574\u4F53\u6027\u662F\u5426\u53D1\u751F\u4E86\u6539\u53D8\uFF0C\u540E\u4E24\u8005\u66F4\u5173\u5FC3\u6587\u4EF6\u5185\u5BB9\u4E0A\u7684\u5DEE\u5F02\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/git/git-qiyuan-03.png" alt=""></p><p>\u9664\u6B64\u4E4B\u5916\uFF0CGit \u66F4\u50CF\u662F\u4E00\u4E2A\u6587\u4EF6\u7CFB\u7EDF\uFF0C\u6BCF\u4E2A\u4F7F\u7528\u5B83\u7684\u4E3B\u673A\u90FD\u53EF\u4EE5\u4F5C\u4E3A\u7248\u672C\u5E93\uFF0C\u5E76\u4E14\u4E0D\u4F9D\u8D56\u4E8E\u8FDC\u7A0B\u4ED3\u5E93\u800C\u79BB\u7EBF\u5DE5\u4F5C\u3002\u5F00\u53D1\u8005\u5728\u672C\u5730\u5C31\u6709\u5386\u53F2\u7248\u672C\u7684\u526F\u672C\uFF0C\u56E0\u6B64\u5C31\u4E0D\u7528\u518D\u88AB\u8FDC\u7A0B\u4ED3\u5E93\u7684\u7F51\u7EDC\u4F20\u8F93\u800C\u675F\u7F1A\u3002</p><p>Git \u4E2D\u7684\u7EDD\u5927\u591A\u6570\u64CD\u4F5C\u90FD\u53EA\u9700\u8981\u8BBF\u95EE\u672C\u5730\u6587\u4EF6\u548C\u8D44\u6E90\uFF0C\u4E00\u822C\u4E0D\u9700\u8981\u6765\u81EA\u7F51\u7EDC\u4E0A\u5176\u5B83\u8BA1\u7B97\u673A\u7684\u4FE1\u606F\u3002\u56E0\u4E3A\u5728\u672C\u5730\u78C1\u76D8\u4E0A\u5C31\u6709\u9879\u76EE\u7684\u5B8C\u6574\u5386\u53F2\uFF0C\u6240\u4EE5 Git \u7684\u5927\u90E8\u5206\u64CD\u4F5C\u770B\u8D77\u6765\u5C31\u50CF\u662F\u5728\u77AC\u95F4\u5B8C\u6210\u7684\u3002</p><p>\u5728\u591A\u4EBA\u534F\u4F5C\u7684\u60C5\u51B5\u4E0B\uFF0CGit \u53EF\u4EE5\u5C06\u672C\u5730\u4ED3\u5E93\u590D\u5236\u7ED9\u5176\u4ED6\u5F00\u53D1\u8005\uFF0C\u90A3\u4E9B\u53D1\u751F\u6539\u53D8\u7684\u6587\u4EF6\u53EF\u4EE5\u4F5C\u4E3A\u65B0\u589E\u7684\u5206\u652F\u88AB\u5BFC\u5165\uFF0C\u518D\u4E0E\u672C\u5730\u4ED3\u5E93\u7684\u8FDB\u884C\u5206\u652F\u5408\u5E76\u3002</p><p>\u5982\u679C\u4F60\u5E0C\u671B\u540E\u9762\u7684\u5B66\u4E60\u66F4\u987A\u5229\uFF0C\u8BF7\u8BB0\u4F4F Git \u8FD9\u4E09\u79CD\u72B6\u6001\uFF1A</p><ul><li>\u5DF2\u63D0\u4EA4\uFF08committed\uFF09\uFF0C\u8868\u793A\u6570\u636E\u5DF2\u7ECF\u5B89\u5168\u7684\u4FDD\u5B58\u5728\u672C\u5730\u6570\u636E\u5E93\u4E2D</li><li>\u5DF2\u4FEE\u6539\uFF08modified\uFF09\uFF0C\u8868\u793A\u4FEE\u6539\u4E86\u6587\u4EF6\uFF0C\u4F46\u8FD8\u6CA1\u4FDD\u5B58\u5230\u6570\u636E\u5E93\u4E2D</li><li>\u5DF2\u6682\u5B58\uFF08staged\uFF09\uFF0C\u8868\u793A\u5BF9\u4E00\u4E2A\u5DF2\u4FEE\u6539\u6587\u4EF6\u7684\u5F53\u524D\u7248\u672C\u505A\u4E86\u6807\u8BB0\uFF0C\u4F7F\u4E4B\u5305\u542B\u5728\u4E0B\u6B21\u63D0\u4EA4\u7684\u5FEB\u7167\u4E2D</li></ul><p>\u7531\u6B64\u5F15\u5165\u4E86 Git \u7684\u4E09\u4E2A\u5DE5\u4F5C\u533A\u57DF\uFF1A</p><ul><li>Git \u4ED3\u5E93\uFF0C\u7528\u6765\u4FDD\u5B58\u9879\u76EE\u7684\u5143\u6570\u636E\u548C\u5BF9\u8C61\u6570\u636E\u5E93</li><li>\u5DE5\u4F5C\u76EE\u5F55\uFF0C\u5BF9\u9879\u76EE\u7684\u67D0\u4E2A\u7248\u672C\u8FDB\u884C\u72EC\u7ACB\u63D0\u53D6</li><li>\u6682\u5B58\u533A\u57DF\uFF0C\u4FDD\u5B58\u4E86\u4E0B\u6B21\u5C06\u63D0\u4EA4\u7684\u6587\u4EF6\u5217\u8868\u4FE1\u606F\uFF0C\u4E5F\u53EF\u4EE5\u53EB\u201C\u7D22\u5F15\u201D</li></ul><p>Git \u7684\u5DE5\u4F5C\u6D41\u7A0B\u662F\u8FD9\u6837\u7684\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/git/git-qiyuan-04.png" alt=""></p><ul><li>\u5728\u5DE5\u4F5C\u76EE\u5F55\u4E2D\u4FEE\u6539\u6587\u4EF6</li><li>\u6682\u5B58\u6587\u4EF6\uFF0C\u5C06\u6587\u4EF6\u7684\u5FEB\u7167\u653E\u5165\u6682\u5B58\u533A\u57DF</li><li>\u63D0\u4EA4\u66F4\u65B0\uFF0C\u627E\u5230\u6682\u5B58\u533A\u57DF\u7684\u6587\u4EF6\uFF0C\u5C06\u5FEB\u7167\u6C38\u4E45\u6027\u5B58\u50A8\u5230 Git \u4ED3\u5E93\u76EE\u5F55</li></ul><h2 id="\u4E8C\u3001git-\u5B89\u88C5" tabindex="-1"><a class="header-anchor" href="#\u4E8C\u3001git-\u5B89\u88C5" aria-hidden="true">#</a> \u4E8C\u3001Git \u5B89\u88C5</h2><p>\u63A5\u4E0B\u6765\uFF0C\u6211\u4EEC\u6765\u770B\u4E00\u4E0B <strong>Git \u7684\u5B89\u88C5</strong>\uFF0CLinux \u548C Windows \u7CFB\u7EDF\u7684\u5B89\u88C5\u5927\u5BB6\u53EF\u4EE5\u5230 Git \u5B98\u7F51\u4E0A\u67E5\u770B\u5B89\u88C5\u65B9\u6CD5\uFF0C\u4E0A\u9762\u8BB2\u7684\u975E\u5E38\u8BE6\u7EC6\u3002</p><blockquote><p>https://git-scm.com/downloads</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/git/git-qiyuan-05.png" alt=""></p><p>\u6211\u4E2A\u4EBA\u4F7F\u7528\u7684 macOS \u7CFB\u7EDF\uFF0C\u53EF\u4EE5\u76F4\u63A5\u4F7F\u7528 <code>brew install git</code> \u547D\u4EE4\u5B89\u88C5\uFF0C\u975E\u5E38\u65B9\u4FBF\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/git/git-qiyuan-06.png" alt=""></p><p>\u5B89\u88C5\u6210\u529F\u540E\uFF0C\u518D\u4F7F\u7528 <code>git --version</code> \u5C31\u53EF\u4EE5\u67E5\u770B\u7248\u672C\u53F7\u4E86\uFF0C\u6211\u672C\u673A\u4E0A\u5B89\u88C5\u7684\u662F 2.23.0 \u7248\u672C\u3002</p><h2 id="\u4E09\u3001git-\u7684\u6570\u636E\u6A21\u578B" tabindex="-1"><a class="header-anchor" href="#\u4E09\u3001git-\u7684\u6570\u636E\u6A21\u578B" aria-hidden="true">#</a> \u4E09\u3001Git \u7684\u6570\u636E\u6A21\u578B</h2><p>\u5C3D\u7BA1 Git \u7684\u63A5\u53E3\u6709\u4E9B\u96BE\u61C2\uFF0C\u4F46\u5B83\u5E95\u5C42\u7684\u8BBE\u8BA1\u548C\u601D\u60F3\u5374\u975E\u5E38\u7684\u4F18\u96C5\u3002\u96BE\u61C2\u7684\u63A5\u53E3\u53EA\u80FD\u9760\u6B7B\u8BB0\u786C\u80CC\uFF0C\u4F46\u4F18\u96C5\u7684\u5E95\u5C42\u8BBE\u8BA1\u5219\u975E\u5E38\u5BB9\u6613\u7406\u89E3\u3002\u6211\u4EEC\u53EF\u4EE5\u901A\u8FC7\u4E00\u79CD\u81EA\u5E95\u5411\u4E0A\u7684\u65B9\u5F0F\u6765\u5B66\u4E60 Git\uFF0C\u5148\u4E86\u89E3\u5E95\u5C42\u7684\u6570\u636E\u6A21\u578B\uFF0C\u518D\u5B66\u4E60\u5B83\u7684\u63A5\u53E3\u3002\u53EF\u4EE5\u8FD9\u4E48\u8BF4\uFF0C\u4E00\u65E6\u641E\u61C2\u4E86 Git \u7684\u6570\u636E\u6A21\u578B\uFF0C\u518D\u5B66\u4E60\u5B83\u7684\u63A5\u53E3\u5E76\u7406\u89E3\u8FD9\u4E9B\u63A5\u53E3\u662F\u5982\u4F55\u64CD\u4F5C\u6570\u636E\u6A21\u578B\u7684\u5C31\u975E\u5E38\u5BB9\u6613\u4E86\u3002</p><p>\u8FDB\u884C\u7248\u672C\u63A7\u5236\u7684\u65B9\u6CD5\u5F88\u591A\uFF0CGit \u62E5\u6709\u4E00\u4E2A\u7CBE\u5FC3\u8BBE\u8BA1\u7684\u6A21\u578B\uFF0C\u8FD9\u4F7F\u5176\u80FD\u591F\u652F\u6301\u7248\u672C\u63A7\u5236\u6240\u9700\u7684\u6240\u6709\u7279\u6027\uFF0C\u6BD4\u5982\u7EF4\u62A4\u5386\u53F2\u8BB0\u5F55\u3001\u652F\u6301\u5206\u652F\u548C\u56E2\u961F\u534F\u4F5C\u3002</p><h3 id="\u5FEB\u7167" tabindex="-1"><a class="header-anchor" href="#\u5FEB\u7167" aria-hidden="true">#</a> \u5FEB\u7167</h3><p>Git \u5C06\u9876\u7EA7\u76EE\u5F55\u4E2D\u7684\u6587\u4EF6\u548C\u6587\u4EF6\u5939\u79F0\u4F5C\u96C6\u5408\uFF0C\u5E76\u901A\u8FC7\u4E00\u7CFB\u5217\u5FEB\u7167\u6765\u7BA1\u7406\u5386\u53F2\u8BB0\u5F55\u3002\u5728 Git \u7684\u672F\u8BED\u4E2D\uFF0C\u6587\u4EF6\u88AB\u79F0\u4E3A blob \u5BF9\u8C61\uFF08\u6570\u636E\u5BF9\u8C61\uFF09\uFF0C\u4E5F\u5C31\u662F\u4E00\u7EC4\u6570\u636E\u3002\u76EE\u5F55\u5219\u88AB\u79F0\u4E3A tree\uFF08\u6811\uFF09\uFF0C\u76EE\u5F55\u4E2D\u53EF\u4EE5\u5305\u542B\u6587\u4EF6\u548C\u5B50\u76EE\u5F55\u3002</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;root&gt; (tree)
+import{_ as s}from"./plugin-vue_export-helper.21dcd24c.js";import{r as d,o as r,c as l,a as e,b as n,e as a,d as i}from"./app.615e41d8.js";const c={},o=a('<h1 id="\u6211\u5728\u5DE5\u4F5C\u4E2D\u662F\u5982\u4F55\u4F7F\u7528-git-\u7684" tabindex="-1"><a class="header-anchor" href="#\u6211\u5728\u5DE5\u4F5C\u4E2D\u662F\u5982\u4F55\u4F7F\u7528-git-\u7684" aria-hidden="true">#</a> \u6211\u5728\u5DE5\u4F5C\u4E2D\u662F\u5982\u4F55\u4F7F\u7528 Git \u7684</h1><h2 id="\u4E00\u3001git-\u8D77\u6E90" tabindex="-1"><a class="header-anchor" href="#\u4E00\u3001git-\u8D77\u6E90" aria-hidden="true">#</a> \u4E00\u3001Git \u8D77\u6E90</h2><p>Git \u662F\u4E00\u4E2A\u5206\u5E03\u5F0F\u7248\u672C\u63A7\u5236\u7CFB\u7EDF\uFF0C\u7F14\u9020\u8005\u662F\u5927\u540D\u9F0E\u9F0E\u7684\u6797\u7EB3\u65AF\xB7\u6258\u74E6\u8332 (Linus Torvalds)\uFF0CGit \u6700\u521D\u7684\u76EE\u7684\u662F\u4E3A\u4E86\u80FD\u66F4\u597D\u7684\u7BA1\u7406 Linux \u5185\u6838\u6E90\u7801\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/git/git-qiyuan-01.png" alt=""></p><p>PS\uFF1A<strong>\u4E3A\u4E86\u80FD\u591F\u5E2E\u52A9\u66F4\u591A\u7684 Java \u7231\u597D\u8005\uFF0C\u5DF2\u5C06\u300AJava \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF\u300B\u5F00\u6E90\u5230\u4E86 GitHub\uFF08\u672C\u7BC7\u5DF2\u6536\u5F55\uFF09\u3002\u5982\u679C\u4F60\u4E5F\u559C\u6B22\u8FD9\u4E2A\u4E13\u680F\uFF0C\u89C9\u5F97\u6709\u5E2E\u52A9\u7684\u8BDD\uFF0C\u53EF\u4EE5\u53BB\u70B9\u4E2A star\uFF0C\u8FD9\u6837\u4E5F\u65B9\u4FBF\u4EE5\u540E\u8FDB\u884C\u66F4\u7CFB\u7EDF\u5316\u7684\u5B66\u4E60</strong>\uFF1A</p>',5),v={href:"https://github.com/itwanger/toBeBetterJavaer",target:"_blank",rel:"noopener noreferrer"},m=i("https://github.com/itwanger/toBeBetterJavaer"),p=a(`<p><em>\u6BCF\u5929\u770B\u7740 star \u6570\u7684\u4E0A\u6DA8\u6211\u5FC3\u91CC\u975E\u5E38\u7684\u5F00\u5FC3\uFF0C\u5E0C\u671B\u8D8A\u6765\u8D8A\u591A\u7684 Java \u7231\u597D\u8005\u80FD\u56E0\u4E3A\u8FD9\u4E2A\u5F00\u6E90\u9879\u76EE\u800C\u53D7\u76CA\uFF0C\u800C\u8D8A\u6765\u8D8A\u591A\u4EBA\u7684 star\uFF0C\u4E5F\u4F1A\u6FC0\u52B1\u6211\u7EE7\u7EED\u66F4\u65B0\u4E0B\u53BB</em>~</p><p>\u5927\u5BB6\u90FD\u77E5\u9053\uFF0CLinux \u5185\u6838\u662F\u5F00\u6E90\u7684\uFF0C\u53C2\u4E0E\u8005\u4F17\u591A\uFF0C\u5230\u76EE\u524D\u4E3A\u6B62\uFF0C\u5171\u6709\u4E24\u4E07\u591A\u540D\u5F00\u53D1\u8005\u7ED9 Linux Kernel \u63D0\u4EA4\u8FC7\u4EE3\u7801\u3002</p><p>\u4F46\u5728 1991 \u5E74\u5230 2002 \u5E74\u671F\u95F4\uFF0CLinus \u4F5C\u4E3A\u9879\u76EE\u7684\u7BA1\u7406\u5458\u5E76\u6CA1\u6709\u501F\u52A9\u4EFB\u4F55\u914D\u7F6E\u7BA1\u7406\u5DE5\u5177\uFF0C\u800C\u662F\u4EE5\u624B\u5DE5\u65B9\u5F0F\u901A\u8FC7 patch \u6765\u5408\u5E76\u5927\u5BB6\u63D0\u4EA4\u7684\u4EE3\u7801\u3002</p><p>\u5012\u4E0D\u662F\u8BF4 Linus \u559C\u6B22\u624B\u5DE5\u5904\u7406\uFF0C\u800C\u662F\u56E0\u4E3A\u4ED6\u5BF9\u4EE3\u7801\u7248\u672C\u7BA1\u7406\u5DE5\u5177\u975E\u5E38\u6311\u5254\uFF0C\u65E0\u8BBA\u662F\u5546\u7528\u7684 clearcase\uFF0C\u8FD8\u662F\u5F00\u6E90\u7684 CVS\u3001SVN \u90FD\u5165\u4E0D\u4E86\u4ED6\u7684\u6CD5\u773C\u3002</p><p>\u76F4\u5230 2002 \u5E74\uFF0CLinus \u624D\u76F8\u4E2D\u4E86\u4E00\u6B3E\u5206\u5E03\u5F0F\u7248\u672C\u63A7\u5236\u7CFB\u7EDF BitKeeper\uFF0C\u867D\u7136\u662F\u5546\u7528\u7684\uFF0C\u4F46 BitKeeper \u613F\u610F\u8BA9 Linux \u793E\u533A\u514D\u8D39\u4F7F\u7528\uFF0C\u8FD9\u8BA9 Linus \u975E\u5E38\u5F00\u5FC3\u548C\u6EE1\u610F\u3002</p><p>\u65F6\u95F4\u6765\u5230 2005 \u5E74\uFF0C\u7531\u4E8E BitKeeper \u63D0\u4F9B\u7684\u9ED8\u8BA4\u63A5\u53E3\u4E0D\u80FD\u6EE1\u8DB3 Linux \u793E\u533A\u7528\u6237\u7684\u5168\u90E8\u9700\u8981\uFF0C\u4E00\u4F4D\u5F00\u53D1\u8005\u5728\u672A\u7ECF\u5141\u8BB8\u7684\u60C5\u51B5\u4E0B\u53CD\u7F16\u8BD1\u4E86 BitKeeper \u5E76\u5229\u7528\u4E86\u672A\u516C\u5F00\u7684\u63A5\u53E3\uFF0C\u4E8E\u662F BitKeeper \u7684\u8457\u4F5C\u6743\u62E5\u6709\u8005\u62C9\u91CC\xB7\u9EA6\u6C83\u4F0A\u5C31\u6C14\u6124\u5730\u6536\u56DE\u4E86 Linux \u793E\u533A\u514D\u8D39\u4F7F\u7528\u7684\u6743\u529B\u3002</p><p>\u6CA1\u529E\u6CD5\uFF0CLinus \u53EA\u597D\u81EA\u5DF1\u786C\u7740\u5934\u76AE\u4E0A\u4E86\u3002\u4ED6\u5BF9\u65B0\u7684\u7248\u672C\u63A7\u5236\u7CFB\u7EDF\u5236\u8BA2\u4E86\u82E5\u5E72\u76EE\u6807\uFF1A</p><ul><li>\u901F\u5EA6</li><li>\u8BBE\u8BA1\u7B80\u5355</li><li>\u5141\u8BB8\u6210\u5343\u4E0A\u4E07\u4E2A\u5E76\u884C\u5F00\u53D1\u7684\u5206\u652F</li><li>\u5B8C\u5168\u5206\u5E03\u5F0F</li><li>\u6709\u80FD\u529B\u9AD8\u6548\u7BA1\u7406\u7C7B\u4F3C Linux \u5185\u6838\u4E00\u6837\u7684\u8D85\u5927\u89C4\u6A21\u9879\u76EE</li></ul><p>\u7ED3\u679C\uFF0C\u4EE4\u4EBA\u610F\u60F3\u4E0D\u5230\u7684\u662F\uFF0CLinus \u53EA\u7528\u4E86 10 \u5929\u65F6\u95F4\u5C31\u7528 C\u8BED\u8A00\u5B8C\u6210\u4E86\u7B2C\u4E00\u4E2A\u7248\u672C\uFF0C\u55EF\u3002\u3002\u795E\u5C31\u662F\u795E\u3002\u5E76\u4E14\u7ED9\u8FD9\u4E2A\u7248\u672C\u8D77\u4E86\u4E00\u4E2A\u7565\u5E26\u5632\u8BBD\u610F\u5473\u7684\u540D\u5B57\u2014\u2014Git\uFF08\u5728\u82F1\u5F0F\u82F1\u8BED\u4FDA\u8BED\u4E2D\u8868\u793A\u201C\u4E0D\u6109\u5FEB\u7684\u4EBA\u201D\uFF09\u3002</p><p>\u6E90\u4EE3\u7801\u7684\u81EA\u8FF0\u6587\u4EF6\u6709\u8FDB\u4E00\u6B65\u7684\u9610\u8FF0\uFF1A</p><blockquote><p>The name &quot;git&quot; was given by Linus Torvalds when he wrote the very first version. He described the tool as &quot;the stupid content tracker&quot; and the name as (depending on your way)</p></blockquote><p>\u4ECE Git \u7684\u8BBE\u8BA1\u4E0A\u6765\u770B\uFF0C\u6709\u4E24\u79CD\u547D\u4EE4\uFF1A\u5206\u522B\u662F\u5E95\u5C42\u547D\u4EE4(Plumbing commands)\u548C\u9AD8\u5C42\u547D\u4EE4(Porcelain commands)\u3002\u4E00\u5F00\u59CB\uFF0CLinus \u53EA\u8BBE\u8BA1\u4E86\u4E00\u4E9B\u7ED9\u5F00\u6E90\u793E\u533A\u7684\u9ED1\u5BA2\u4EEC\u4F7F\u7528\u7684\u7B26\u5408 Unix KISS \u539F\u5219\u7684\u547D\u4EE4\uFF0C\u56E0\u4E3A\u9ED1\u5BA2\u4EEC\u672C\u8EAB\u5C31\u662F\u52A8\u624B\u9AD8\u624B\uFF0C\u6C34\u7BA1\u574F\u4E86\u5C31\u64B8\u8D77\u8896\u5B50\u53BB\u4FEE\u7406\uFF0C\u56E0\u6B64\u8FD9\u4E9B\u547D\u4EE4\u88AB\u79F0\u4E3A plumbing commands\u3002</p><p>Linus \u5728\u63D0\u4EA4\u4E86\u7B2C\u4E00\u4E2A git commit \u540E\uFF0C\u5C31\u5411\u793E\u533A\u53D1\u5E03\u4E86 git \u5DE5\u5177\u3002\u5F53\u65F6\uFF0C\u793E\u533A\u4E2D\u6709\u4F4D\u53EB Junio Hamano \u7684\u5F00\u53D1\u8005\u89C9\u5F97\u8FD9\u4E2A\u5DE5\u5177\u5F88\u6709\u610F\u601D\uFF0C\u4FBF\u4E0B\u8F7D\u4E86\u4EE3\u7801\uFF0C\u7ED3\u679C\u53D1\u73B0\u4E00\u5171\u624D 1244 \u884C\u4EE3\u7801\uFF0C\u8FD9\u66F4\u4EE4\u4ED6\u60CA\u5947\uFF0C\u4E5F\u5F15\u53D1\u4E86\u6781\u5927\u7684\u5174\u8DA3\u3002Junio \u5728\u90AE\u4EF6\u5217\u8868\u4E0E Linus \u4EA4\u6D41\u5E76\u5E2E\u52A9\u589E\u52A0\u4E86 merge \u7B49\u529F\u80FD\uFF0C\u800C\u540E\u6301\u7EED\u6253\u78E8 git\uFF0C\u6700\u540E Junio \u5B8C\u5168\u63A5\u624B\u4E86 Git \u7684\u7EF4\u62A4\u5DE5\u4F5C\uFF0CLinus \u5219\u56DE\u53BB\u7EE7\u7EED\u7EF4\u62A4 Linux Kernel \u9879\u76EE\u3002</p><p>Junio Hamano \u89C9\u5F97 Linus \u8BBE\u8BA1\u7684\u8FD9\u4E9B\u547D\u4EE4\u5BF9\u4E8E\u666E\u901A\u7528\u6237\u4E0D\u592A\u53CB\u597D\uFF0C\u56E0\u6B64\u5728\u6B64\u4E4B\u4E0A\uFF0C\u5C01\u88C5\u4E86\u66F4\u6613\u4E8E\u4F7F\u7528\u3001\u63A5\u53E3\u66F4\u7CBE\u7F8E\u7684\u9AD8\u5C42\u547D\u4EE4\uFF0C\u4E5F\u5C31\u662F\u6211\u4EEC\u4ECA\u5929\u6BCF\u5929\u4F7F\u7528\u7684 git add, git commit \u4E4B\u7C7B\u3002Git add \u5C31\u662F\u5C01\u88C5\u4E86 update-cache \u547D\u4EE4\uFF0C\u800C git commit \u5C31\u662F\u5C01\u88C5\u4E86 write-tree, commit-tree \u547D\u4EE4\u3002</p><p>\u5982\u679C\u9009\u5386\u53F2\u4E0A\u6700\u4F1F\u5927\u7684\u4E00\u6B21 Git \u4EE3\u7801\u63D0\u4EA4\uFF0C\u90A3\u4E00\u5B9A\u662F\u8FD9 Git \u5DE5\u5177\u9879\u76EE\u672C\u8EAB\u7684\u7B2C\u4E00\u6B21\u4EE3\u7801\u63D0\u4EA4\u3002\u8FD9\u6B21\u4EE3\u7801\u63D0\u4EA4\u65E0\u7591\u662F\u5F00\u521B\u6027\u7684\uFF0C<strong>\u5982\u679C\u8BF4 Linux \u9879\u76EE\u4FC3\u6210\u4E86\u5F00\u6E90\u8F6F\u4EF6\u7684\u6210\u529F\u5E76\u6539\u5199\u4E86\u8F6F\u4EF6\u884C\u4E1A\u7684\u683C\u5C40\uFF0C\u90A3\u4E48 Git \u5219\u662F\u6539\u53D8\u4E86\u5168\u4E16\u754C\u5F00\u53D1\u8005\u7684\u5DE5\u4F5C\u65B9\u5F0F\u548C\u5199\u4F5C\u65B9\u5F0F</strong>\u3002</p><p>\u5982\u4ECA\uFF0CGit \u5DF2\u7ECF\u6210\u4E3A\u5168\u7403\u8F6F\u4EF6\u5F00\u53D1\u8005\u7684\u6807\u914D\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/git/git-qiyuan-02.png" alt=""></p><p>\u539F\u672C\u7684 Git \u53EA\u9002\u7528\u4E8E Unix/Linux \u5E73\u53F0\uFF0C\u4F46\u968F\u7740 Cygwin\u3001msysGit \u73AF\u5883\u7684\u6210\u719F\uFF0C\u4EE5\u53CA TortoiseGit \u8FD9\u6837\u6613\u7528\u7684GUI\u5DE5\u5177\uFF0CGit \u5728 Windows \u5E73\u53F0\u4E0B\u4E5F\u9010\u6E10\u6210\u719F\u3002</p><blockquote><p>PS1\uFF1ACygwin \u7684\u4E3B\u8981\u76EE\u7684\u662F\u901A\u8FC7\u91CD\u65B0\u7F16\u8BD1\uFF0C\u5C06 POSIX \u7CFB\u7EDF\uFF08\u4F8B\u5982Linux\u3001BSD\uFF0C\u4EE5\u53CA\u5176\u4ED6Unix\u7CFB\u7EDF\uFF09\u4E0A\u7684\u8F6F\u4EF6\u79FB\u690D\u5230Windows\u4E0A\u3002</p></blockquote><blockquote><p>PS2\uFF1AmsysGit \u524D\u9762\u7684 4 \u4E2A\u5B57\u5E55\u6765\u6E90\u4E8E MSYS \u9879\u76EE\uFF0C\u800C MSYS \u53C8\u6E90\u4E8E MinGW\uFF08Minimalist GNU for Windows\uFF0C\u6700\u7B80GNU\u5DE5\u5177\u96C6\uFF09\uFF0C\u901A\u8FC7\u589E\u52A0\u4E86\u4E00\u4E2A\u7531bash\u63D0\u4F9B\u7684shell\u73AF\u5883\u4EE5\u53CA\u5176\u4ED6\u76F8\u5173\u5DE5\u5177\u8F6F\u4EF6\uFF0C\u7EC4\u6210\u4E86\u4E00\u4E2A\u6700\u7B80\u7CFB\u7EDF\uFF08Minimal System\uFF09\uFF0C\u5229\u7528MinGW\u63D0\u4F9B\u7684\u5DE5\u5177\uFF0C\u4EE5\u53CAGit\u9488\u5BF9MinGW\u7684\u4E00\u4E2A\u5206\u652F\u7248\u672C\uFF0C\u53EF\u4EE5\u5728Windows\u5E73\u53F0\u4E3AGit\u7F16\u8BD1\u51FA\u4E00\u4E2A\u539F\u751F\u5E94\u7528\uFF0C\u7ED3\u5408MSYS\u5C31\u7EC4\u6210\u4E86msysGit\u3002</p></blockquote><p>Git \u548C\u4F20\u7EDF\u7684\u7248\u672C\u63A7\u5236\u5DE5\u5177 CVS\u3001SVN \u6709\u4E0D\u5C0F\u7684\u533A\u522B\uFF0C\u524D\u8005\u5173\u5FC3\u7684\u662F\u6587\u4EF6\u7684\u6574\u4F53\u6027\u662F\u5426\u53D1\u751F\u4E86\u6539\u53D8\uFF0C\u540E\u4E24\u8005\u66F4\u5173\u5FC3\u6587\u4EF6\u5185\u5BB9\u4E0A\u7684\u5DEE\u5F02\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/git/git-qiyuan-03.png" alt=""></p><p>\u9664\u6B64\u4E4B\u5916\uFF0CGit \u66F4\u50CF\u662F\u4E00\u4E2A\u6587\u4EF6\u7CFB\u7EDF\uFF0C\u6BCF\u4E2A\u4F7F\u7528\u5B83\u7684\u4E3B\u673A\u90FD\u53EF\u4EE5\u4F5C\u4E3A\u7248\u672C\u5E93\uFF0C\u5E76\u4E14\u4E0D\u4F9D\u8D56\u4E8E\u8FDC\u7A0B\u4ED3\u5E93\u800C\u79BB\u7EBF\u5DE5\u4F5C\u3002\u5F00\u53D1\u8005\u5728\u672C\u5730\u5C31\u6709\u5386\u53F2\u7248\u672C\u7684\u526F\u672C\uFF0C\u56E0\u6B64\u5C31\u4E0D\u7528\u518D\u88AB\u8FDC\u7A0B\u4ED3\u5E93\u7684\u7F51\u7EDC\u4F20\u8F93\u800C\u675F\u7F1A\u3002</p><p>Git \u4E2D\u7684\u7EDD\u5927\u591A\u6570\u64CD\u4F5C\u90FD\u53EA\u9700\u8981\u8BBF\u95EE\u672C\u5730\u6587\u4EF6\u548C\u8D44\u6E90\uFF0C\u4E00\u822C\u4E0D\u9700\u8981\u6765\u81EA\u7F51\u7EDC\u4E0A\u5176\u5B83\u8BA1\u7B97\u673A\u7684\u4FE1\u606F\u3002\u56E0\u4E3A\u5728\u672C\u5730\u78C1\u76D8\u4E0A\u5C31\u6709\u9879\u76EE\u7684\u5B8C\u6574\u5386\u53F2\uFF0C\u6240\u4EE5 Git \u7684\u5927\u90E8\u5206\u64CD\u4F5C\u770B\u8D77\u6765\u5C31\u50CF\u662F\u5728\u77AC\u95F4\u5B8C\u6210\u7684\u3002</p><p>\u5728\u591A\u4EBA\u534F\u4F5C\u7684\u60C5\u51B5\u4E0B\uFF0CGit \u53EF\u4EE5\u5C06\u672C\u5730\u4ED3\u5E93\u590D\u5236\u7ED9\u5176\u4ED6\u5F00\u53D1\u8005\uFF0C\u90A3\u4E9B\u53D1\u751F\u6539\u53D8\u7684\u6587\u4EF6\u53EF\u4EE5\u4F5C\u4E3A\u65B0\u589E\u7684\u5206\u652F\u88AB\u5BFC\u5165\uFF0C\u518D\u4E0E\u672C\u5730\u4ED3\u5E93\u7684\u8FDB\u884C\u5206\u652F\u5408\u5E76\u3002</p><p>\u5982\u679C\u4F60\u5E0C\u671B\u540E\u9762\u7684\u5B66\u4E60\u66F4\u987A\u5229\uFF0C\u8BF7\u8BB0\u4F4F Git \u8FD9\u4E09\u79CD\u72B6\u6001\uFF1A</p><ul><li>\u5DF2\u63D0\u4EA4\uFF08committed\uFF09\uFF0C\u8868\u793A\u6570\u636E\u5DF2\u7ECF\u5B89\u5168\u7684\u4FDD\u5B58\u5728\u672C\u5730\u6570\u636E\u5E93\u4E2D</li><li>\u5DF2\u4FEE\u6539\uFF08modified\uFF09\uFF0C\u8868\u793A\u4FEE\u6539\u4E86\u6587\u4EF6\uFF0C\u4F46\u8FD8\u6CA1\u4FDD\u5B58\u5230\u6570\u636E\u5E93\u4E2D</li><li>\u5DF2\u6682\u5B58\uFF08staged\uFF09\uFF0C\u8868\u793A\u5BF9\u4E00\u4E2A\u5DF2\u4FEE\u6539\u6587\u4EF6\u7684\u5F53\u524D\u7248\u672C\u505A\u4E86\u6807\u8BB0\uFF0C\u4F7F\u4E4B\u5305\u542B\u5728\u4E0B\u6B21\u63D0\u4EA4\u7684\u5FEB\u7167\u4E2D</li></ul><p>\u7531\u6B64\u5F15\u5165\u4E86 Git \u7684\u4E09\u4E2A\u5DE5\u4F5C\u533A\u57DF\uFF1A</p><ul><li>Git \u4ED3\u5E93\uFF0C\u7528\u6765\u4FDD\u5B58\u9879\u76EE\u7684\u5143\u6570\u636E\u548C\u5BF9\u8C61\u6570\u636E\u5E93</li><li>\u5DE5\u4F5C\u76EE\u5F55\uFF0C\u5BF9\u9879\u76EE\u7684\u67D0\u4E2A\u7248\u672C\u8FDB\u884C\u72EC\u7ACB\u63D0\u53D6</li><li>\u6682\u5B58\u533A\u57DF\uFF0C\u4FDD\u5B58\u4E86\u4E0B\u6B21\u5C06\u63D0\u4EA4\u7684\u6587\u4EF6\u5217\u8868\u4FE1\u606F\uFF0C\u4E5F\u53EF\u4EE5\u53EB\u201C\u7D22\u5F15\u201D</li></ul><p>Git \u7684\u5DE5\u4F5C\u6D41\u7A0B\u662F\u8FD9\u6837\u7684\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/git/git-qiyuan-04.png" alt=""></p><ul><li>\u5728\u5DE5\u4F5C\u76EE\u5F55\u4E2D\u4FEE\u6539\u6587\u4EF6</li><li>\u6682\u5B58\u6587\u4EF6\uFF0C\u5C06\u6587\u4EF6\u7684\u5FEB\u7167\u653E\u5165\u6682\u5B58\u533A\u57DF</li><li>\u63D0\u4EA4\u66F4\u65B0\uFF0C\u627E\u5230\u6682\u5B58\u533A\u57DF\u7684\u6587\u4EF6\uFF0C\u5C06\u5FEB\u7167\u6C38\u4E45\u6027\u5B58\u50A8\u5230 Git \u4ED3\u5E93\u76EE\u5F55</li></ul><h2 id="\u4E8C\u3001git-\u5B89\u88C5" tabindex="-1"><a class="header-anchor" href="#\u4E8C\u3001git-\u5B89\u88C5" aria-hidden="true">#</a> \u4E8C\u3001Git \u5B89\u88C5</h2><p>\u63A5\u4E0B\u6765\uFF0C\u6211\u4EEC\u6765\u770B\u4E00\u4E0B <strong>Git \u7684\u5B89\u88C5</strong>\uFF0CLinux \u548C Windows \u7CFB\u7EDF\u7684\u5B89\u88C5\u5927\u5BB6\u53EF\u4EE5\u5230 Git \u5B98\u7F51\u4E0A\u67E5\u770B\u5B89\u88C5\u65B9\u6CD5\uFF0C\u4E0A\u9762\u8BB2\u7684\u975E\u5E38\u8BE6\u7EC6\u3002</p><blockquote><p>https://git-scm.com/downloads</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/git/git-qiyuan-05.png" alt=""></p><p>\u6211\u4E2A\u4EBA\u4F7F\u7528\u7684 macOS \u7CFB\u7EDF\uFF0C\u53EF\u4EE5\u76F4\u63A5\u4F7F\u7528 <code>brew install git</code> \u547D\u4EE4\u5B89\u88C5\uFF0C\u975E\u5E38\u65B9\u4FBF\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/git/git-qiyuan-06.png" alt=""></p><p>\u5B89\u88C5\u6210\u529F\u540E\uFF0C\u518D\u4F7F\u7528 <code>git --version</code> \u5C31\u53EF\u4EE5\u67E5\u770B\u7248\u672C\u53F7\u4E86\uFF0C\u6211\u672C\u673A\u4E0A\u5B89\u88C5\u7684\u662F 2.23.0 \u7248\u672C\u3002</p><h2 id="\u4E09\u3001git-\u7684\u6570\u636E\u6A21\u578B" tabindex="-1"><a class="header-anchor" href="#\u4E09\u3001git-\u7684\u6570\u636E\u6A21\u578B" aria-hidden="true">#</a> \u4E09\u3001Git \u7684\u6570\u636E\u6A21\u578B</h2><p>\u5C3D\u7BA1 Git \u7684\u63A5\u53E3\u6709\u4E9B\u96BE\u61C2\uFF0C\u4F46\u5B83\u5E95\u5C42\u7684\u8BBE\u8BA1\u548C\u601D\u60F3\u5374\u975E\u5E38\u7684\u4F18\u96C5\u3002\u96BE\u61C2\u7684\u63A5\u53E3\u53EA\u80FD\u9760\u6B7B\u8BB0\u786C\u80CC\uFF0C\u4F46\u4F18\u96C5\u7684\u5E95\u5C42\u8BBE\u8BA1\u5219\u975E\u5E38\u5BB9\u6613\u7406\u89E3\u3002\u6211\u4EEC\u53EF\u4EE5\u901A\u8FC7\u4E00\u79CD\u81EA\u5E95\u5411\u4E0A\u7684\u65B9\u5F0F\u6765\u5B66\u4E60 Git\uFF0C\u5148\u4E86\u89E3\u5E95\u5C42\u7684\u6570\u636E\u6A21\u578B\uFF0C\u518D\u5B66\u4E60\u5B83\u7684\u63A5\u53E3\u3002\u53EF\u4EE5\u8FD9\u4E48\u8BF4\uFF0C\u4E00\u65E6\u641E\u61C2\u4E86 Git \u7684\u6570\u636E\u6A21\u578B\uFF0C\u518D\u5B66\u4E60\u5B83\u7684\u63A5\u53E3\u5E76\u7406\u89E3\u8FD9\u4E9B\u63A5\u53E3\u662F\u5982\u4F55\u64CD\u4F5C\u6570\u636E\u6A21\u578B\u7684\u5C31\u975E\u5E38\u5BB9\u6613\u4E86\u3002</p><p>\u8FDB\u884C\u7248\u672C\u63A7\u5236\u7684\u65B9\u6CD5\u5F88\u591A\uFF0CGit \u62E5\u6709\u4E00\u4E2A\u7CBE\u5FC3\u8BBE\u8BA1\u7684\u6A21\u578B\uFF0C\u8FD9\u4F7F\u5176\u80FD\u591F\u652F\u6301\u7248\u672C\u63A7\u5236\u6240\u9700\u7684\u6240\u6709\u7279\u6027\uFF0C\u6BD4\u5982\u7EF4\u62A4\u5386\u53F2\u8BB0\u5F55\u3001\u652F\u6301\u5206\u652F\u548C\u56E2\u961F\u534F\u4F5C\u3002</p><h3 id="\u5FEB\u7167" tabindex="-1"><a class="header-anchor" href="#\u5FEB\u7167" aria-hidden="true">#</a> \u5FEB\u7167</h3><p>Git \u5C06\u9876\u7EA7\u76EE\u5F55\u4E2D\u7684\u6587\u4EF6\u548C\u6587\u4EF6\u5939\u79F0\u4F5C\u96C6\u5408\uFF0C\u5E76\u901A\u8FC7\u4E00\u7CFB\u5217\u5FEB\u7167\u6765\u7BA1\u7406\u5386\u53F2\u8BB0\u5F55\u3002\u5728 Git \u7684\u672F\u8BED\u4E2D\uFF0C\u6587\u4EF6\u88AB\u79F0\u4E3A blob \u5BF9\u8C61\uFF08\u6570\u636E\u5BF9\u8C61\uFF09\uFF0C\u4E5F\u5C31\u662F\u4E00\u7EC4\u6570\u636E\u3002\u76EE\u5F55\u5219\u88AB\u79F0\u4E3A tree\uFF08\u6811\uFF09\uFF0C\u76EE\u5F55\u4E2D\u53EF\u4EE5\u5305\u542B\u6587\u4EF6\u548C\u5B50\u76EE\u5F55\u3002</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;root&gt; (tree)
 |
 +- foo (tree)
 |  |
diff --git a/dist/assets/go.html.712c93cd.js b/dist/assets/go.html.dbab658a.js
similarity index 99%
rename from dist/assets/go.html.712c93cd.js
rename to dist/assets/go.html.dbab658a.js
index 4dd91f6c..65c5026f 100644
--- a/dist/assets/go.html.712c93cd.js
+++ b/dist/assets/go.html.dbab658a.js
@@ -1 +1 @@
-import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{r as s,o as p,c as l,a as e,b as a,e as r,d as t}from"./app.a0271b9c.js";const i={},g=r('<h1 id="go\u5B66\u4E60\u8DEF\u7EBF-\u5EFA\u8BAE\u6536\u85CF" tabindex="-1"><a class="header-anchor" href="#go\u5B66\u4E60\u8DEF\u7EBF-\u5EFA\u8BAE\u6536\u85CF" aria-hidden="true">#</a> Go\u5B66\u4E60\u8DEF\u7EBF\uFF08\u5EFA\u8BAE\u6536\u85CF\u{1F44D}\uFF09</h1><p>\u5927\u5BB6\u597D\uFF0C\u6211\u662F\u4E8C\u54E5\u5440\uFF01\u6700\u8FD1\u53C8\u6709\u4E00\u4E2A\u8BFB\u8005\u6765\u54A8\u8BE2\u6211\u7684\u5EFA\u8BAE\uFF1A<strong>\u5E94\u5C4A\u751F\uFF0C\u8981\u6C42 Java \u8FDB\u53BB\u540E\u8F6C Go\uFF0C\u95EE\u6211\u548B\u6837\uFF1F</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/go-1.png" alt=""></p><p>\u636E\u6211\u81EA\u5DF1\u7684\u5370\u8C61\uFF0C\u524D\u524D\u540E\u540E\u6709\u5341\u4E2A\u8BFB\u8005\u6765\u95EE\u8FC7\u6211\u8FD9\u4E2A\u95EE\u9898\u4E86\u3002\u4E00\u65B9\u9762 Java \u5C31\u4E1A\u5C97\u4F4D\u786E\u5B9E\u591A\uFF0C\u85AA\u8D44\u4E5F\u7ED9\u529B\uFF1B\u53E6\u5916\u4E00\u65B9\u9762\uFF0CGo \u786E\u5B9E\u5F88\u6709\u6F5C\u529B\u3002</p><p>\u5C24\u5176\u662F\u56FD\u5185\u7684\u5B57\u8282\u8DF3\u52A8\uFF0CGo \u5728\u5E38\u7528\u7684\u7F16\u7A0B\u8BED\u8A00\u4E2D\u5360\u6BD4\u662F\u6700\u9AD8\u7684\uFF0C\u5927\u90E8\u5206\u4EA7\u54C1\u7684\u540E\u7AEF\u90FD\u5728\u4F7F\u7528 Go\u3002</p><p>\u90A3\u4F5C\u4E3A\u8D34\u5FC3\u7684\u4E8C\u54E5\uFF0C\u5FC5\u987B\u5F97\u7ED9\u5927\u5BB6\u68B3\u7406\u4E00\u6CE2\u601D\u8DEF\u4E86\uFF0C\u5E0C\u671B\u80FD\u7ED9\u9700\u8981\u7684\u8BFB\u8005\u4E00\u70B9\u70B9\u5E2E\u52A9\u548C\u542F\u53D1~</p><h3 id="\u4E00\u3001go-\u7684\u4F18\u52BF\u548C\u52A3\u52BF" tabindex="-1"><a class="header-anchor" href="#\u4E00\u3001go-\u7684\u4F18\u52BF\u548C\u52A3\u52BF" aria-hidden="true">#</a> \u4E00\u3001Go \u7684\u4F18\u52BF\u548C\u52A3\u52BF</h3><p>Go \u8BED\u8A00\u8BDE\u751F\u4E8E 2009 \u5E74\uFF0C\u53D1\u5C55\u5230\u73B0\u5728\uFF0C\u5DF2\u7ECF 12 \u5C81\u4E86\uFF08\u5E94\u8BE5\u6CA1\u7B97\u9519\u5427\u{1F62D}\uFF09\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/go-2.png" alt=""></p><p>\u5F88\u591A\u660E\u661F\u7EA7\u7684\u5F00\u6E90\u4EA7\u54C1\uFF0C\u6BD4\u5982\u8BF4 Kubernetes\u3001Docker\u7B49\uFF0C\u90FD\u662F\u57FA\u4E8E Go \u8BED\u8A00\u7F16\u5199\u7684\u3002\u518D\u52A0\u4E0A\u8FD1\u4E9B\u5E74\u6765\u5FAE\u670D\u52A1\u67B6\u6784\u548C\u4E91\u539F\u751F\u6280\u672F\u7684\u666E\u53CA\uFF0C\u4E5F\u5927\u5927\u7684\u5E26\u706B\u4E86 Go \u8FD9\u95E8\u7F16\u7A0B\u8BED\u8A00\uFF0C\u4F7F\u5176\u5728 C/C++ \u548C Java \u4E2D\u6740\u51FA\u4E86\u4E00\u6761\u8840\u8DEF\u3002</p><p>\u518D\u52A0\u4E0A\u4ECE 2010 \u5E74 5 \u6708\u8D77\uFF0CGoogle \u5F00\u59CB\u5C06 Go \u8BED\u8A00\u6295\u5165\u5230\u540E\u7AEF\u57FA\u7840\u8BBE\u65BD\u7684\u5B9E\u9645\u5F00\u53D1\u4E2D\uFF0C\u5F88\u591A\u6211\u4EEC\u80FD\u8033\u719F\u80FD\u8BE6\u7684\u5E94\u7528\u90FD\u6709\u4F7F\u7528 Go \u8BED\u8A00\uFF0C\u6BD4\u5982\u8BF4\u8C37\u6B4C\u5730\u56FE\u3001Google Cloud \u7B49\u3002</p><p>\u56FD\u5185\u7684\u5B57\u8282\u8DF3\u52A8\uFF0C\u5C31\u522B\u63D0\u4E86\u3002</p><p>Google \u548C\u5B57\u8282\u4E24\u5BB6\u5927\u5382\u5BF9 Go \u7684\u5927\u529B\u6295\u5165\uFF0C\u5728\u4E00\u5B9A\u7A0B\u5EA6\u4E0A\u53C8\u52A0\u901F\u4E86 Go \u8FD9\u95E8\u7F16\u7A0B\u8BED\u8A00\u7684\u53D1\u5C55\u3002</p><p>\u76EE\u524D\uFF0C\u4F7F\u7528 Go \u8BED\u8A00\u7684\u516C\u53F8\u8D8A\u6765\u8D8A\u591A\u4E86\uFF0C\u963F\u91CC\u3001\u767E\u5EA6\u3001\u817E\u8BAF\u3001\u5C0F\u7C73\u8FD9\u4E9B\u4E92\u8054\u7F51\u5927\u5382\u4E5F\u5728\u79EF\u6781\u62E5\u62B1\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/go-3.png" alt=""></p><p>\u8FD9\u4F7F\u5F97 Go \u5DE5\u7A0B\u5E08\u7684\u85AA\u8D44\u5F85\u9047\u4E5F\u5F97\u5230\u4E86\u5F88\u5927\u7A0B\u5EA6\u4E0A\u63D0\u9AD8\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/go-4.png" alt=""></p><p>\u5F53\u7136\u4E86\uFF0C\u76EE\u524D\u57FA\u672C\u4E0A\u9664\u4E86\u5927\u5382\uFF0C\u5F88\u5C11\u6709\u5176\u4ED6\u4E2D\u5C0F\u578B\u516C\u53F8\u7528 Go\uFF0C\u56E0\u4E3A Go \u7684\u751F\u6001\u8FD8\u6BD4\u4E0D\u4E0A Java\uFF0C\u6CA1\u6709 Java \u90A3\u4E48\u4E30\u5BCC\u5065\u5168\uFF0C\u4E2D\u5C0F\u516C\u53F8\u7684\u6295\u5165\u4EA7\u51FA\u6BD4\u6BD4\u8F83\u4F4E\u3002\u5927\u5382\u6709\u4EBA\u6709\u94B1\uFF0C\u613F\u610F\u5728 Go \u4E0A\u6295\u5165\u6210\u672C\u3002</p><p>\u53E6\u5916\uFF0CGo \u4E5F\u6CA1\u6709\u50CF\u5916\u754C\u5439\u6367\u7684\u90A3\u4E48\u725B\u53C9\uFF0C\u5C31\u7F16\u7A0B\u8BED\u8A00\u7684\u6392\u884C\u699C\u4E0A\u6765\u770B\uFF0CGo \u8FD8\u662F\u4E2A\u6EF4\u6EF4\uFF08Python\u3001C/C++\u3001Java\u3001C# \u8FD9\u4E9B\u4ECD\u7136\u662F\u524D\u6392\uFF09\uFF0C\u6709\u5F85\u53D1\u5C55\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/go-5.jpg" alt=""></p><h3 id="\u4E8C\u3001\u4E3A\u4EC0\u4E48\u4F1A\u8981\u6C42-java-\u8F6C-go-\u5462" tabindex="-1"><a class="header-anchor" href="#\u4E8C\u3001\u4E3A\u4EC0\u4E48\u4F1A\u8981\u6C42-java-\u8F6C-go-\u5462" aria-hidden="true">#</a> \u4E8C\u3001\u4E3A\u4EC0\u4E48\u4F1A\u8981\u6C42 Java \u8F6C Go \u5462\uFF1F</h3><p>\u6700\u76F4\u63A5\u7684\u539F\u56E0\u5C31\u662F Go \u8FD9\u8FB9\u6BD4\u8F83\u7F3A\u4EBA\uFF0C\u800C Java \u8FD9\u8FB9\u57FA\u672C\u4E0A\u662F\u62DB\u8058\u7684\u591A\uFF0C\u7ADE\u8058\u7684\u66F4\u591A\u3002</p><p>\u719F\u7EC3\u638C\u63E1 Java \u7684\u4E00\u822C\u90FD\u6BD4\u8F83\u80FD\u6253\uFF0C\u8F6C Go \u540E\u4F5C\u6218\u80FD\u529B\u80AF\u5B9A\u4E5F\u662F\u4E0D\u5BB9\u5C0F\u89D1\u3002</p><p>\u5BF9\u4E8E\u6211\u4EEC\u56FD\u5185\u7684\u5F00\u53D1\u73AF\u5883\u6765\u8BF4\uFF0CJava \u7684\u786E\u662F\u9876\u6D41\uFF0C\u6211\u4E2A\u4EBA\u4E5F\u662F Java \u7684\u91CD\u5EA6\u4F7F\u7528\u8005\uFF0C\u4F46<strong>\u6211\u79C1\u5E95\u4E0B\u4E5F\u5728\u5B66\u4E60\u5176\u4ED6\u7684\u7F16\u7A0B\u8BED\u8A00\uFF0C\u56E0\u4E3A\u53EA\u6709\u8FD9\u6837\uFF0C\u624D\u80FD\u6700\u5927\u7A0B\u5EA6\u4E0A\u4FDD\u6301\u81EA\u5DF1\u7684\u7ADE\u4E89\u529B</strong>\u3002</p><p>\u6BCF\u79CD\u7F16\u7A0B\u8BED\u8A00\u53EA\u8981\u80FD\u53D1\u6325\u51FA\u5B83\u6700\u5927\u7684\u4F18\u52BF\uFF0C\u5C31\u662F\u503C\u5F97\u6211\u4EEC\u53BB\u5B66\u4E60\u548C\u4F7F\u7528\u7684\u3002</p><p>\u518D\u8005\uFF0C\u7F16\u7A0B\u8BED\u8A00\u8FD9\u4E1C\u897F\uFF0C\u4F60\u638C\u63E1\u4E86\u4E00\u4E2A\uFF0C\u518D\u5B66\u53E6\u5916\u4E00\u4E2A\u4E5F\u4F1A\u5F88\u5FEB\u7684\u3002</p><p>\u622A\u6B62\u5230\u76EE\u524D\uFF0C\u6211\u5B66\u8FC7 Python\u3001C/C++\u3001Go\u3001JavaScript \u7B49\u7B49\uFF0C\u56E0\u4E3A\u6709 Java \u8BED\u8A00\u7684\u5E95\u5B50\u5728\uFF0C\u5B66\u8FD9\u4E9B\u7F16\u7A0B\u8BED\u8A00\u7684\u65F6\u5019\uFF0C\u963B\u529B\u57FA\u672C\u4E0A\u5C31\u50CF\u5728\u6CF3\u6C60\u91CC\u6E38\u6CF3\u4E00\u6837\uFF0C\u4E00\u5F00\u59CB\u4F1A\u611F\u89C9\u6709\u70B9\u56F0\u96BE\uFF0C\u7B49\u719F\u7EC3\u4E86\u4E4B\u540E\uFF0C\u4F1A\u611F\u89C9\u5F88\u8212\u670D\u3002</p><h3 id="\u4E09\u3001go-\u8BED\u8A00\u8BE5\u600E\u4E48\u5B66\u4E60\u5462" tabindex="-1"><a class="header-anchor" href="#\u4E09\u3001go-\u8BED\u8A00\u8BE5\u600E\u4E48\u5B66\u4E60\u5462" aria-hidden="true">#</a> \u4E09\u3001Go \u8BED\u8A00\u8BE5\u600E\u4E48\u5B66\u4E60\u5462\uFF1F</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/go-6.png" alt=""></p><p>\u4E0D\u7BA1\u600E\u4E48\u8BF4\uFF0CGo \u8BED\u8A00\u7684\u786E\u662F\u503C\u5F97\u53BB\u5B66\u4E60\u7684\u3002\u5982\u679C\u516C\u53F8\u786E\u5B9E\u9700\u8981\u8F6C Go 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\u8BED\u8A00\u7684\u5B66\u4E60\u8D44\u6599\uFF0C\u5168\u90E8\u514D\u8D39\u5F00\u6E90\uFF0C\u662F\u6211\u809D\u4E86\u4E24\u4E2A\u5927\u591C\u7CBE\u6311\u7EC6\u9009\u51FA\u6765\u7684\u3002</p><p>\u8BB0\u4F4F\u4E00\u70B9\uFF1A<strong>\u4E0D\u7BA1\u662F\u5B66\u4E60\u54EA\u4E00\u95E8\u7F16\u7A0B\u8BED\u8A00\uFF0C\u987A\u5E8F\u57FA\u672C\u4E0A\u5C31\u662F\u89C6\u9891\u5165\u95E8+\u6559\u7A0B/\u4E66\u7C4D\u5DE9\u56FA+\u9879\u76EE\u7EC3\u4E60</strong>\u3002</p><p><strong>1\uFF09\u89C6\u9891\u8BFE</strong></p><p><strong>\u7B2C\u4E00\u5957\u89C6\u9891\uFF1A\u300AGo \u7F16\u7A0B\u57FA\u7840\u300B</strong>\uFF0C\u4E3B\u8981\u9762\u5411 Go \u8BED\u8A00\u65B0\u624B\u7EA7\u522B\u7684\u5B66\u4E60\u8005\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/go-8.jpg" alt=""></p>',37),c=t("\u8BFE\u7A0B\u5730\u5740\uFF1A"),h={href:"https://github.com/unknwon/go-fundamental-programming",target:"_blank",rel:"noopener 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src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/go-13.jpg" alt=""></p><p>\u4E0D\u8FC7\u5E78\u597D\u6211\u5907\u4EFD\u4E86\u4E00\u4EFD\u79BB\u7EBF\u7248 PDF\uFF0C\u91CC\u9762\u7684\u5185\u5BB9\u8FD8\u662F\u975E\u5E38\u5B8C\u6574\u7684\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/go-14.jpg" alt=""></p><p>\u9700\u8981\u7684\u5C0F\u4F19\u4F34\u8BF7\u957F\u6309\u8BC6\u522B/\u626B\u63CF\u4E0B\u65B9\u7684\u4E8C\u7EF4\u7801\u5173\u6CE8\u4F5C\u8005\u7684\u539F\u521B\u516C\u4F17\u53F7\u300C<strong>\u6C89\u9ED8\u738B\u4E8C</strong>\u300D\u56DE\u590D\u5173\u952E\u5B57\u300C<strong>go</strong>\u300D\u5C31\u53EF\u4EE5\u62C9\u53D6\u5230\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongzhonghao.png" alt="\u626B\u7801\u5173\u6CE8\u540E\u56DE\u590D\u300Cgo\u300D\u5173\u952E\u5B57"></p><p><strong>\u7B2C\u4E94\u5957\u6559\u7A0B\uFF1AGo\u6807\u51C6\u5E93\u6587\u6863</strong>\uFF0C\u53EF\u4EE5\u67E5\u8BE2\u6BCF\u4E2AAPI\u7684\u5177\u4F53\u4F7F\u7528\u65B9\u5F0F\uFF0C\u8FD9\u4E5F\u662F Go \u5F00\u53D1\u8005\u7684\u5FC5\u5907\u624B\u518C\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/go-15.jpg" alt=""></p>',10),z=t("\u5728\u7EBF\u5730\u5740\uFF1A"),D={href:"https://studygolang.com/static/pkgdoc/main.html",target:"_blank",rel:"noopener noreferrer"},M=t("https://studygolang.com/static/pkgdoc/main.html"),K=r('<p>\u518D\u63A8\u8350\u4E00\u4E9B\u6BD4\u8F83\u4F18\u8D28\u7684\u7EB8\u8D28\u4E66\u7C4D\u5427\u3002</p><p><strong>\u7B2C\u4E00\u672C\uFF1AGo\u8BED\u8A00\u5B9E\u6218</strong>\uFF0C\u8FD9\u672C\u4E66\u5173\u6CE8\u4E8E Go \u8BED\u8A00\u7684\u89C4\u8303\u548C\u5B9E\u73B0\uFF0C\u6D89\u53CA\u7684\u5185\u5BB9\u5305\u62EC\u8BED\u6CD5\u3001Go 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diff --git a/dist/assets/gson.html.da4ecf62.js b/dist/assets/gson.html.a359eddd.js
similarity index 99%
rename from dist/assets/gson.html.da4ecf62.js
rename to dist/assets/gson.html.a359eddd.js
index 21cfd9d3..c6fbf5d0 100644
--- a/dist/assets/gson.html.da4ecf62.js
+++ b/dist/assets/gson.html.a359eddd.js
@@ -1,4 +1,4 @@
-import{_ as e}from"./plugin-vue_export-helper.21dcd24c.js";import{r as o,o as c,c as l,a as n,b as t,d as s,e as p}from"./app.a0271b9c.js";const i={},u=n("h3",{id:"_01\u3001\u524D\u4E16\u4ECA\u751F",tabindex:"-1"},[n("a",{class:"header-anchor",href:"#_01\u3001\u524D\u4E16\u4ECA\u751F","aria-hidden":"true"},"#"),s(" 01\u3001\u524D\u4E16\u4ECA\u751F")],-1),r=n("p",null,"\u6211\u53EB Gson\uFF0C\u662F\u4E00\u6B3E\u5F00\u6E90\u7684 Java \u5E93\uFF0C\u4E3B\u8981\u7528\u9014\u4E3A\u5E8F\u5217\u5316 Java \u5BF9\u8C61\u4E3A JSON \u5B57\u7B26\u4E32\uFF0C\u6216\u53CD\u5E8F\u5217\u5316 JSON \u5B57\u7B26\u4E32\u6210 Java \u5BF9\u8C61\u3002\u4ECE\u6211\u7684\u540D\u5B57\u4E0A\uFF0C\u5C31\u53EF\u4EE5\u770B\u5F97\u51FA\u4E00\u4E9B\u7AEF\u502A\uFF0C\u6211\u5E76\u975E\u7C4D\u7C4D\u65E0\u540D\uFF0C\u6211\u51FA\u8EAB\u8D35\u65CF\uFF0C\u6211\u7238\u5C31\u662F Google\uFF0C\u5E02\u503C\u5BCC\u53EF\u654C\u56FD\u3002",-1),k=n("p",null,"\u5F53\u7136\u4E86\uFF0C\u4F5C\u4E3A\u4E00\u4E2A\u806A\u660E\u4EBA\uFF0C\u6211\u662F\u6709\u81EA\u77E5\u4E4B\u660E\u7684\uFF0C\u6211\u5728\u6211\u7238\u773C\u91CC\uFF0C\u6211\u5E76\u4E0D\u662F\u6700\u95EA\u8000\u7684\u90A3\u9897\u661F\u3002",-1),d=n("p",null,"\u6211\u6765\u5230\u8FD9\u4E2A\u4E16\u4E0A\uFF0C\u7EAF\u5C5E\u4E00\u6B21\u610F\u5916\uFF0C\u53CD\u6B63\u6211\u7238\u662F\u8FD9\u6837\u5BF9\u6211\u8BF4\u7684\uFF0C\u4ED6\u603B\u8BF4\u6211\u662F\u4ECE\u6CB3\u8FB9\u6361\u56DE\u6765\u7684\uFF0C\u867D\u7136\u6211\u4E00\u76F4\u4E0D\u592A\u76F8\u4FE1\u3002\u5BF9\u4E8E\u8FD9\u4EF6\u4E8B\uFF0C\u6211\u5411\u6211\u5988\u786E\u8BA4\u8FC7\uFF0C\u5979\u542C\u5B8C\u7B11\u5F97\u5408\u4E0D\u62E2\u5634\uFF0C\u8BF4\u6211\u592A\u5929\u771F\u3002",-1),v=s("\u957F\u5927\u540E\uFF0C\u6211\u559C\u6B22\u56DB\u5904\u95EF\u8361\uFF0C\u56E0\u6B64\u7ED3\u8BC6\u4E86\u4E0D\u5C11\u540C\u884C\uFF0C\u5176\u4E2D\u5C31\u6709 "),m={href:"https://mp.weixin.qq.com/s/e94E2FquEzjmXSlHRA8Qzw",target:"_blank",rel:"noopener noreferrer"},g=s("Jackson"),b=s(" \u548C "),f={href:"https://mp.weixin.qq.com/s/TsIHRTOyF2_4oNb1APfZ6Q",target:"_blank",rel:"noopener noreferrer"},y=s("Fastjson"),w=s("\u3002"),h=p(`<p>\u8BF4\u8D77 Jackson\uFF0C\u6211\u603B\u80FD\u7B2C\u4E00\u65F6\u95F4\u60F3\u5230 MJ\uFF0C\u90A3\u4E2A\u88AB\u4E0A\u5E1D\u5E26\u8D70\u7684\u6D41\u884C\u5929\u738B\u3002Jackson \u5728 GitHub \u4E0A\u6709 6.1k \u7684 star\uFF0C\u867D\u7136\u4ED6\u7684\u7C89\u4E1D\u6570\u6CA1\u6211\u591A\uFF0C\u4F46\u4F5C\u4E3A Spring Boot \u7684\u9ED8\u8BA4 JSON \u89E3\u6790\u5668\uFF0C\u6211\u975E\u5E38\u5730\u5C0A\u91CD\u4ED6\u3002</p><p>Fastjson \u6765\u81EA\u795E\u79D8\u7684\u4E1C\u65B9\uFF0C\u867D\u7136\u7206\u51FA\u8FC7\u4E00\u4E9B\u4E25\u91CD\u7684\u6F0F\u6D1E\uFF0C\u4F46\u8FD9\u5E76\u4E0D\u59A8\u788D\u4ED6\u6210\u4E3A\u6700\u53D7\u6B22\u8FCE\u7684 JSON \u89E3\u6790\u5668\uFF0C\u4ED6\u7684\u7C89\u4E1D\u6570\u6BD4\u6211\u8FD8\u8981\u591A\uFF0C\u5C3D\u7BA1\u6211\u5DF2\u7ECF\u6709\u8D85\u8FC7 18K \u7684 star\u3002</p><p>\u5916\u4EBA\u603B\u8BF4\u6211\u4EEC\u662F\u7ADE\u4E89\u5BF9\u624B\uFF0C\u4F46\u6211\u5FC5\u987B\u5F97\u544A\u8BC9\u4ED6\u4EEC\uFF0C\u6211\u4EEC\u4EE8\u7684\u5173\u7CFB\uFF0C\u597D\u5230\u5C31\u5DEE\u7A7F\u540C\u4E00\u6761\u5185\u88E4\u4E86\u3002</p><p>\u6211\u4EEC\u5404\u6709\u4F18\u52BF\uFF0CJackson \u5728\u8FD0\u884C\u65F6\u5360\u7528\u7684\u5185\u5B58\u8F83\u5C11\uFF0CFastjson \u7684\u901F\u5EA6\u66F4\u5FEB\uFF0C\u800C\u6211\uFF0C\u53EF\u4EE5\u5904\u7406\u4EFB\u610F\u7684 Java \u5BF9\u8C61\uFF0C\u751A\u81F3\u5728\u6CA1\u6709\u6E90\u4EE3\u7801\u7684\u60C5\u51B5\u4E0B\u3002\u53E6\u5916\uFF0C\u6211\u5BF9\u6CDB\u578B\u7684\u652F\u6301\u4E5F\u66F4\u52A0\u7684\u53CB\u597D\u3002</p><h3 id="_02\u3001\u6DFB\u52A0\u4F9D\u8D56" tabindex="-1"><a class="header-anchor" href="#_02\u3001\u6DFB\u52A0\u4F9D\u8D56" aria-hidden="true">#</a> 02\u3001\u6DFB\u52A0\u4F9D\u8D56</h3><p>\u5728\u4F7F\u7528\u6211\u7684 API \u4E4B\u524D\uFF0C\u9700\u8981\u5148\u628A\u6211\u6DFB\u52A0\u5230\u9879\u76EE\u5F53\u4E2D\uFF0C\u63A8\u8350\u4F7F\u7528 Maven \u548C Gradle \u4E24\u79CD\u5F62\u5F0F\u3002</p><p>Maven\uFF1A</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
+import{_ as e}from"./plugin-vue_export-helper.21dcd24c.js";import{r as o,o as c,c as l,a as n,b as t,d as s,e as p}from"./app.615e41d8.js";const i={},u=n("h3",{id:"_01\u3001\u524D\u4E16\u4ECA\u751F",tabindex:"-1"},[n("a",{class:"header-anchor",href:"#_01\u3001\u524D\u4E16\u4ECA\u751F","aria-hidden":"true"},"#"),s(" 01\u3001\u524D\u4E16\u4ECA\u751F")],-1),r=n("p",null,"\u6211\u53EB Gson\uFF0C\u662F\u4E00\u6B3E\u5F00\u6E90\u7684 Java \u5E93\uFF0C\u4E3B\u8981\u7528\u9014\u4E3A\u5E8F\u5217\u5316 Java \u5BF9\u8C61\u4E3A JSON \u5B57\u7B26\u4E32\uFF0C\u6216\u53CD\u5E8F\u5217\u5316 JSON \u5B57\u7B26\u4E32\u6210 Java \u5BF9\u8C61\u3002\u4ECE\u6211\u7684\u540D\u5B57\u4E0A\uFF0C\u5C31\u53EF\u4EE5\u770B\u5F97\u51FA\u4E00\u4E9B\u7AEF\u502A\uFF0C\u6211\u5E76\u975E\u7C4D\u7C4D\u65E0\u540D\uFF0C\u6211\u51FA\u8EAB\u8D35\u65CF\uFF0C\u6211\u7238\u5C31\u662F Google\uFF0C\u5E02\u503C\u5BCC\u53EF\u654C\u56FD\u3002",-1),k=n("p",null,"\u5F53\u7136\u4E86\uFF0C\u4F5C\u4E3A\u4E00\u4E2A\u806A\u660E\u4EBA\uFF0C\u6211\u662F\u6709\u81EA\u77E5\u4E4B\u660E\u7684\uFF0C\u6211\u5728\u6211\u7238\u773C\u91CC\uFF0C\u6211\u5E76\u4E0D\u662F\u6700\u95EA\u8000\u7684\u90A3\u9897\u661F\u3002",-1),d=n("p",null,"\u6211\u6765\u5230\u8FD9\u4E2A\u4E16\u4E0A\uFF0C\u7EAF\u5C5E\u4E00\u6B21\u610F\u5916\uFF0C\u53CD\u6B63\u6211\u7238\u662F\u8FD9\u6837\u5BF9\u6211\u8BF4\u7684\uFF0C\u4ED6\u603B\u8BF4\u6211\u662F\u4ECE\u6CB3\u8FB9\u6361\u56DE\u6765\u7684\uFF0C\u867D\u7136\u6211\u4E00\u76F4\u4E0D\u592A\u76F8\u4FE1\u3002\u5BF9\u4E8E\u8FD9\u4EF6\u4E8B\uFF0C\u6211\u5411\u6211\u5988\u786E\u8BA4\u8FC7\uFF0C\u5979\u542C\u5B8C\u7B11\u5F97\u5408\u4E0D\u62E2\u5634\uFF0C\u8BF4\u6211\u592A\u5929\u771F\u3002",-1),v=s("\u957F\u5927\u540E\uFF0C\u6211\u559C\u6B22\u56DB\u5904\u95EF\u8361\uFF0C\u56E0\u6B64\u7ED3\u8BC6\u4E86\u4E0D\u5C11\u540C\u884C\uFF0C\u5176\u4E2D\u5C31\u6709 "),m={href:"https://mp.weixin.qq.com/s/e94E2FquEzjmXSlHRA8Qzw",target:"_blank",rel:"noopener noreferrer"},g=s("Jackson"),b=s(" \u548C "),f={href:"https://mp.weixin.qq.com/s/TsIHRTOyF2_4oNb1APfZ6Q",target:"_blank",rel:"noopener noreferrer"},y=s("Fastjson"),w=s("\u3002"),h=p(`<p>\u8BF4\u8D77 Jackson\uFF0C\u6211\u603B\u80FD\u7B2C\u4E00\u65F6\u95F4\u60F3\u5230 MJ\uFF0C\u90A3\u4E2A\u88AB\u4E0A\u5E1D\u5E26\u8D70\u7684\u6D41\u884C\u5929\u738B\u3002Jackson \u5728 GitHub \u4E0A\u6709 6.1k \u7684 star\uFF0C\u867D\u7136\u4ED6\u7684\u7C89\u4E1D\u6570\u6CA1\u6211\u591A\uFF0C\u4F46\u4F5C\u4E3A Spring Boot \u7684\u9ED8\u8BA4 JSON \u89E3\u6790\u5668\uFF0C\u6211\u975E\u5E38\u5730\u5C0A\u91CD\u4ED6\u3002</p><p>Fastjson \u6765\u81EA\u795E\u79D8\u7684\u4E1C\u65B9\uFF0C\u867D\u7136\u7206\u51FA\u8FC7\u4E00\u4E9B\u4E25\u91CD\u7684\u6F0F\u6D1E\uFF0C\u4F46\u8FD9\u5E76\u4E0D\u59A8\u788D\u4ED6\u6210\u4E3A\u6700\u53D7\u6B22\u8FCE\u7684 JSON \u89E3\u6790\u5668\uFF0C\u4ED6\u7684\u7C89\u4E1D\u6570\u6BD4\u6211\u8FD8\u8981\u591A\uFF0C\u5C3D\u7BA1\u6211\u5DF2\u7ECF\u6709\u8D85\u8FC7 18K \u7684 star\u3002</p><p>\u5916\u4EBA\u603B\u8BF4\u6211\u4EEC\u662F\u7ADE\u4E89\u5BF9\u624B\uFF0C\u4F46\u6211\u5FC5\u987B\u5F97\u544A\u8BC9\u4ED6\u4EEC\uFF0C\u6211\u4EEC\u4EE8\u7684\u5173\u7CFB\uFF0C\u597D\u5230\u5C31\u5DEE\u7A7F\u540C\u4E00\u6761\u5185\u88E4\u4E86\u3002</p><p>\u6211\u4EEC\u5404\u6709\u4F18\u52BF\uFF0CJackson \u5728\u8FD0\u884C\u65F6\u5360\u7528\u7684\u5185\u5B58\u8F83\u5C11\uFF0CFastjson \u7684\u901F\u5EA6\u66F4\u5FEB\uFF0C\u800C\u6211\uFF0C\u53EF\u4EE5\u5904\u7406\u4EFB\u610F\u7684 Java \u5BF9\u8C61\uFF0C\u751A\u81F3\u5728\u6CA1\u6709\u6E90\u4EE3\u7801\u7684\u60C5\u51B5\u4E0B\u3002\u53E6\u5916\uFF0C\u6211\u5BF9\u6CDB\u578B\u7684\u652F\u6301\u4E5F\u66F4\u52A0\u7684\u53CB\u597D\u3002</p><h3 id="_02\u3001\u6DFB\u52A0\u4F9D\u8D56" tabindex="-1"><a class="header-anchor" href="#_02\u3001\u6DFB\u52A0\u4F9D\u8D56" aria-hidden="true">#</a> 02\u3001\u6DFB\u52A0\u4F9D\u8D56</h3><p>\u5728\u4F7F\u7528\u6211\u7684 API \u4E4B\u524D\uFF0C\u9700\u8981\u5148\u628A\u6211\u6DFB\u52A0\u5230\u9879\u76EE\u5F53\u4E2D\uFF0C\u63A8\u8350\u4F7F\u7528 Maven \u548C Gradle \u4E24\u79CD\u5F62\u5F0F\u3002</p><p>Maven\uFF1A</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
     &lt;groupId&gt;com.google.code.gson&lt;/groupId&gt;
     &lt;artifactId&gt;gson&lt;/artifactId&gt;
     &lt;version&gt;2.8.6&lt;/version&gt;
diff --git a/dist/assets/guangzhou.html.14bc2637.js b/dist/assets/guangzhou.html.14bc2637.js
deleted file mode 100644
index dd4ac36e..00000000
--- a/dist/assets/guangzhou.html.14bc2637.js
+++ /dev/null
@@ -1 +0,0 @@
-import{_ as r}from"./plugin-vue_export-helper.21dcd24c.js";import{r as c,o as p,c as o,a as e,b as n,e as b,d as t}from"./app.a0271b9c.js";const s={},g=b('<h1 id="\u60F3\u53BB\u5E7F\u5DDE\u4E86" tabindex="-1"><a class="header-anchor" href="#\u60F3\u53BB\u5E7F\u5DDE\u4E86" aria-hidden="true">#</a> \u60F3\u53BB\u5E7F\u5DDE\u4E86\uFF01</h1><p>\u4E0A\u6B21\u53D1\u5B8C\u6DF1\u5733\u7684\uFF0C\u53D1\u73B0\u5E7F\u5DDE\u7684\u547C\u58F0\u6BD4\u8F83\u9AD8\uFF0C\u4E8E\u662F\u6211\u641E\u6765\u4E86\uFF01</p><p>\u5E7F\u5DDE\u7684\u4E92\u8054\u7F51\u73AF\u5883\u76F8\u5BF9\u6765\u8BF4\u8FD8\u4E0D\u9519\u3002</p><p>\u5E7F\u5DDE\u7684\u7E41\u534E\u4EE5\u53CA\u5B83\u7684\u9B45\u529B\u4E0D\u7528\u6211\u591A\u8BF4\uFF0C\u65E0\u8BBA\u4ECE\u4EBA\u6587\u8FD8\u662F\u4ECE\u7ECF\u6D4E\u6765\u8BF4\u90FD\u662F\u4E0D\u865A\u5176\u5B83\u57CE\u5E02\u7684\u3002\u4E0D\u8FC7\u6211\u5728\u9762\u8BD5\u65F6\u53D1\u73B0\uFF0C\u5E7F\u5DDE\u9664\u4E86\u51E0\u4E2A\u5934\u90E8\u5927\u5382\u662F\u7EDF\u4E00\u85AA\u8D44\u6807\u51C6\u5916\uFF0C\u76F8\u8F83\u4E8E\u5176\u5B83\u4E00\u7EBF\u57CE\u5E02\uFF0C\u5E7F\u5DDE\u7684\u4E92\u8054\u7F51\u884C\u4E1A\u7ED9\u6211\u7684\u611F\u89C9\u662F\u6574\u4F53\u85AA\u8D44\u6C34\u5E73\u504F\u4F4E\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-0f0eb358-f7ae-46b9-b070-8b93e401735e.png" alt=""></p><p>\u5927\u5BB6\u6CE8\u610F\u5440\uFF0C\u5176\u5B9E\u5B66\u8BA1\u7B97\u673A\u76F8\u5173\u4E13\u4E1A\u7684\u60F3\u5728\u5E7F\u5DDE\u6323\u94B1\uFF0C\u4E0D\u6B62\u53EF\u4EE5\u901A\u8FC7\u4E92\u8054\u7F51\u516C\u53F8\uFF0C\u4E5F\u53EF\u4EE5\u901A\u8FC7\u5F53\u516C\u52A1\u5458\uFF0C\u6559\u5E08\u7B49\u65B9\u5F0F\u53BB\u6323\u94B1\u5440\u3002\u5E94\u5C4A\u751F\u8003\u8FDB\u4F53\u5236\u5185\u5F53\u516C\u52A1\u5458\uFF0C\u5E74\u85AA\u4E5F20\u591A\u4E07\u5462\uFF0C\u5E76\u4E14\u5404\u65B9\u9762\u798F\u5229\u5F85\u9047\u7EDD\u5BF9\u5230\u4F4D\uFF0C\u76F8\u5F53\u4E0D\u9519\u4E86\u3002\u4E0B\u9762\u6211\u4EEC\u8FD8\u662F\u5206\u4E92\u8054\u7F51\u516C\u53F8\u4EE5\u53CA\u56FD\u4F01\u592E\u4F01\u7814\u7A76\u6240\u4ECB\u7ECD\u5427\u3002</p><p>\u58F0\u660E\u4E00\u4E0B\uFF0C\u4E0B\u9762\u7684\u5185\u5BB9\u4EC5\u4EE3\u8868\u6211\u4E2A\u4EBA\u7684\u8C03\u67E5\u7ED3\u679C\uFF0C\u5982\u679C\u5927\u5BB6\u77E5\u9053\u66F4\u591A\u7684\u4FE1\u606F\uFF0C\u6B22\u8FCE\u8865\u5145\u5440\u3002</p><h2 id="\u5DE5\u4F5C\u673A\u4F1A" tabindex="-1"><a class="header-anchor" href="#\u5DE5\u4F5C\u673A\u4F1A" aria-hidden="true">#</a> \u5DE5\u4F5C\u673A\u4F1A</h2><h3 id="\u4E92\u8054\u7F51\u516C\u53F8" tabindex="-1"><a class="header-anchor" href="#\u4E92\u8054\u7F51\u516C\u53F8" aria-hidden="true">#</a> \u4E92\u8054\u7F51\u516C\u53F8</h3><p><strong>\u7F51\u6613</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-53893155-f8cb-4bfe-b0b4-768c43c03862.png" alt=""></p><p>\u7F51\u6613\u5728\u5E7F\u5DDE\u4E3B\u8981\u662F\u6E38\u620F\u90E8\u95E8\u3002\u7B97\u662F\u7F51\u6613\u7684\u6838\u5FC3\u4E1A\u52A1\u4E86\u3002\u6CE8\u610F\uFF0C\u7F51\u6613\u9762\u8BD5\u65F6\u5019\u662F\u6563\u88C5\u7684\uFF0C\u7F51\u6613\u4E92\u5A31\u3001\u7F51\u6613\u96F7\u706B\u548C\u7F51\u6613\u4E92\u8054\u7F51\u662F\u5206\u5F00\u62DB\u8058\u7684\uFF0C\u6211\u5F53\u65F6\u6295\u7B80\u5386\u90FD\u662F\u5206\u5F00\u7ED9\u4ED6\u4EEC\u6295\u7684\uFF0C\u540C\u6837\u7684\u7B80\u5386\u6211\u5728\u7F51\u7AD9\u4E0A\u586B\u4E86\u4E09\u6B21\uFF0C\u7D2F\u6B7B\u3002\u4E0D\u8FC7\u597D\u5904\u5C31\u662F\u4F60\u6709\u4E09\u6B21\u673A\u4F1A\u80FD\u8FDB\u7F51\u6613 ~ \u6CE8\u610F\uFF0C\u4E92\u5A31\u3001\u96F7\u706B\u3001\u4E92\u8054\u7F51\u7684\u85AA\u8D44\u65B9\u6848\u4E5F\u662F\u4E0D\u4E00\u6837\u7684\u3002\u7F51\u6613\u7684\u85AA\u8D44\u65B9\u6848\u5F88\u590D\u6742\uFF0C\u8FD9\u91CC\u9762\u6C34\u592A\u6DF1\uFF0C\u6211\u611F\u89C9\u6211\u6709\u70B9\u628A\u63E1\u4E0D\u4F4F~ \u6211\u77E5\u9053\u6709\u4EBA\u62FF\u5230sp\u5927\u6982\u5C31\u662F 25k * 16\u5427\uFF0C\u8FD8\u4F1A\u6709\u80A1\u7968\u3002\u7F51\u6613\u98DF\u5802\u7684\u4F19\u98DF\u662F\u771F\u7684\u597D\uFF0C\u5927\u90E8\u5206\u4EBA\u53BB\u4E86\u5DE5\u4F5C\u4E00\u6BB5\u65F6\u95F4\u90FD\u80D6\u4E86\u3002</p><p><strong>\u5FAE\u4FE1</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-f4e50c0c-5214-484a-b5e9-18a20a929745.png" alt=""></p><p>\u5E7F\u5DDE\u4E3B\u8981\u662F\u817E\u8BAF\u7684 wxg \u4E8B\u4E1A\u7FA4\uFF0C\u4E5F\u5C31\u662F\u5FAE\u4FE1\u3002wxg \u4E8B\u4E1A\u7FA4\u7684\u6548\u76CA\u975E\u5E38\u597D\uFF0C\u80FD\u8FDB wxg \u8FD8\u662F\u5F88\u68D2\u7684\uFF0C\u4E0D\u8FC7\u9762\u8BD5\u96BE\u5EA6\u4E5F\u633A\u5927\u7684\u3002\u817E\u8BAF\u53BB\u5E74\u6821\u62DB\u7684\u85AA\u8D44\u5206 17k\uFF0C18.5k\uFF0C20k\uFF0C21.5k\uFF0C23k \u51E0\u4E2A\u6863\u6B21\uFF0Chr\u8BF4\u662F\u5E94\u5C4A\u751F\u7B2C\u4E00\u5E74\u4FDD\u8BC118\u85AA\uFF0C\u4E0D\u8FC7\u7B2C\u4E8C\u5E74\u5C31\u4E0D\u4FDD\u8BC1\u4E86\u54C8\u3002\u6CE8\u610F\uFF0C\u817E\u8BAF\u5F00\u51FA\u7684\u85AA\u8D44\u662F\u53EF\u4EE5argue\u7684\uFF0C\u5982\u679C\u4ED6\u7ED9\u4F60\u7684\u85AA\u8D44\u4E0D\u6EE1\u610F\uFF0C\u4F60\u53EF\u4EE5\u7528\u5176\u5B83offer\u8DDF\u817E\u8BAF\u7684 hr argue \u66F4\u9AD8\u6863\u6B21\u7684\u85AA\u8D44\uFF0C\u6709\u6210\u529F\u7684\u3002\u53E6\u5916\u6821\u62DB\u751F\u8FD8\u6709\u7B7E\u5B57\u8D39\u4EE5\u53CA\u80A1\u7968\u4EE5\u53CA\u79DF\u623F\u8865\u8D34\u3002\u817E\u8BAF\u65F6\u4E0D\u65F6\u9001\u70B9\u5C0F\u793C\u7269\uFF0C\u5DE5\u4F5C\u7684\u8212\u9002\u5EA6\u8FD8\u662F\u4E0D\u9519\u7684\u3002</p><p><strong>\u5B57\u8282\u8DF3\u52A8</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-a1c6a805-e7fe-450f-bd18-c24d760b60e7.png" alt=""></p><p>\u5E7F\u5DDE\u7684\u5B57\u8282\u6574\u4F53\u4E0A\u4E0D\u5982\u5176\u5B83\u5730\u65B9\u7684\u5B57\u8282\u52A0\u73ED\u4E25\u91CD\uFF0C\u4E0D\u8FC7\u4E5F\u8981\u770B\u90E8\u95E8\uFF0C\u6709\u7684\u90E8\u95E8\u542C\u8BF4\u633A\u7D2F\u7684\u3002\u5B57\u8282\u4E4B\u524D\u4E00\u76F4\u662F\u5927\u5C0F\u5468\uFF0C\u524D\u4E0D\u4E45\u521A\u521A\u5BA3\u5E03\u8981\u53D6\u6D88\u5927\u5C0F\u5468\uFF0C\u6709\u53CC\u4F11\u8FD8\u662F\u633A\u5E78\u798F\u7684\uFF0C\u5C31\u662F\u8981\u5C11\u6323\u4E0D\u5C11\u94B1\u4E86\uFF0C\u770B\u4F60\u662F\u4E0D\u662F\u594B\u6597\u903C\u4E86\u3002\u6211\u770B\u523021\u5C4A\u5B57\u8282\u6821\u62DB\u7684\u85AA\u8D44\u4E3B\u8981\u662F\u6BCF\u670820k\uFF0C22k\uFF0C24k\uFF0C26k\uFF0C28k\uFF0C30k\u4E0D\u7B49\u3002\u4E0D\u8FC7\u6211\u770B\u6821\u62DB\u62FF\u5230\u5E7F\u5DDE\u8FD9\u8FB9offer\u7684\u5927\u90E8\u5206\u662F22k\u548C24k\u7684\u6708\u85AA\uFF0C</p><p><strong>\u6B22\u805A\u65F6\u4EE3</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-7d47dd3b-924e-4af3-99e9-85c77dca3d45.png" alt=""></p><p>\u5927\u5BB6\u770B\u5230\u6B22\u805A\u65F6\u4EE3\u8FD9\u4E2A\u540D\u79F0\u53EF\u80FD\u6709\u70B9\u964C\u751F\uFF0C\u5176\u5B9E YY \u548C \u864E\u7259 \u90FD\u662F\u6B22\u805A\u65F6\u4EE3\u7684\u3002\u6B22\u805A\u65F6\u4EE3\u7684\u85AA\u8D44\u6C34\u5E73\u6211\u4E0D\u6E05\u695A\uFF0C\u6211\u95EE\u4E86\u670B\u53CB\u4E5F\u4E0D\u6E05\u695A\uFF0C\u6211\u5C31\u53BB\u67E5\u6821\u62DB\u85AA\u6C34\u4E0A\u7684\u85AA\u8D44\u7206\u6599\u3002\u6709\u70B9\u8FF7\u5440\uFF0C\u53BB\u5E74\u6821\u62DB\uFF0C\u5F00\u53D1\u65B9\u5411\u7684\u6708\u85AA14k\u300116k\u300118k \u7684\u90FD\u6709\uFF0C\u4F46\u662F\u8FD9\u7B97\u6CD5\u85AA\u8D44\u7684\u7206\u6599\u548B\u8FD8\u76F4\u63A5\u5C31 27k \u5462\uFF1F\u8FD9\u4E5F\u5DEE\u7684\u592A\u591A\u4E86\u5427\u3002\u6709\u9760\u8C31\u6D88\u606F\u7684\u8001\u94C1\u6B22\u8FCE\u6765\u8865\u5145\u3002</p><p><strong>\u552F\u54C1\u4F1A</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-bd501c3a-05ac-4a1e-a27c-7645dc6d8ab0.png" alt=""></p><p>\u552F\u54C1\u4F1A\u7B97\u662F\u5E7F\u5DDE\u672C\u5730\u7684\u4E00\u9738\u4E86\u5427\uFF0C\u552F\u54C1\u4F1A\u7684\u798F\u5229\u633A\u7ED9\u529B\u7684\uFF0C\u5305\u4E09\u9910\uFF0C\u53CC\u4F11\uFF0C\u79DF\u623F\u8865\u8D34\u3002\u672C\u79D1\u751F\u5F00\u53D1\u7684\u6708\u85AA\u4E3B\u8981\u96C6\u4E2D\u572814k-16k\u3002</p><p><strong>SHEIN</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-d805d3a7-a5b8-4e5a-a304-e59cac38baad.png" alt=""></p><p>\u8FD9\u5BB6\u516C\u53F8\u6211\u719F\uFF0C\u6211\u5C31\u7ED9\u4F60\u4EEC\u5C55\u5F00\u8BB2\u8BB2\u3002\u8FD9\u5BB6\u516C\u53F8\u6700\u8FD1\u52BF\u5934\u5F88\u731B\uFF0C\u505A\u8DE8\u5883\u7535\u5546\u7684\uFF0C\u4E3B\u8981\u5356\u5973\u88C5\u3002\u6211\u5728\u53BB\u5E74\u79CB\u62DB\u521D\u671F\u8FD8\u9762\u8BD5\u8FC7\u8FD9\u5BB6\u516C\u53F8\uFF0C\u9762\u8BD5\u96BE\u5EA6\u6BD4\u8F83\u53CB\u597D\u3002\u9996\u5148\u662F hr \u7ED9\u6211\u53D1\u4E86\u4E2A\u7B14\u8BD5\u94FE\u63A5\uFF0C\u8BA9\u6211\u51E0\u5929\u5185\u627E\u4E2A\u65F6\u95F4\u505A\u4E86\u3002\u901A\u8FC7\u7B14\u8BD5\u540E\uFF0C\u7B2C\u4E00\u8F6E\u9762\u8BD5\uFF0C\u9762\u8BD5\u4E86\u5927\u6982\u6709 30 \u591A\u5206\u949F\uFF0C\u4E3B\u8981\u95EE\u4E86\u9879\u76EE\u4EE5\u53CA\u9762\u8BD5\u516B\u80A1\u6587\uFF0C\u6CA1\u6709\u8BA9\u5199\u4EE3\u7801\uFF0C\u7136\u540E\u9762\u8BD5\u5C31\u901A\u8FC7\u4E86\u3002\u7B2C\u4E8C\u8F6E\u9762\u8BD5\uFF0C\u9762\u8BD5\u5B98\u968F\u4FBF\u95EE\u4E86\u4E24\u4E2A\u516B\u80A1\u6587\u95EE\u9898\u5C31\u5F00\u59CB\u804A\u7406\u60F3\u4E86\u3002\u7B2C\u4E09\u8F6E\u9762\u8BD5\u597D\u50CF\u662F\u4ED6\u4EEC\u7684 cto\uFF0C\u95EE\u6211\u9AD8\u8003\u6570\u5B66\u8003\u591A\u5C11\u5206 ~ \u95EE\u6211\u4E0A\u5B66\u671F\u95F4\u5927\u6982\u5199\u4E86\u591A\u5C11\u884C\u4EE3\u7801~ \u7136\u540E\u53C8\u804A\u4E86\u51E0\u53E5\u5C31\u8DDF\u6211\u7ED3\u675F\u9762\u8BD5\u4E86\u3002\u5C31\u7ED9\u6211 offer\u4E86\u3002\u540E\u7EEDhr\u8DDF\u6211\u8C08\u85AA\u7684\u65F6\u5019\u8BF4\u4ED6\u4EEC\u52A0\u73ED\u5C11\uFF0C\u5DE5\u8D44\u662F 16k * 14\uFF0C\u6211\u89C9\u5F97\u5DE5\u8D44\u6709\u70B9\u5C11\uFF0C\u5C31\u6CA1\u63A5offer\u3002</p><p><strong>\u4E09\u4E03\u4E92\u5A31</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-b7f04bcf-684c-4c89-acb2-5dc8907284a8.png" alt=""></p><p>\u6211\u4E86\u89E3\u5230\u4E09\u4E03\u4E92\u5A31\u540E\u7AEF\u5C97\u4F4D\u5927\u90E8\u5206\u662F PHP\uFF0C\u672C\u79D1\u751F\u6821\u62DB\u8FDB\u6765\u85AA\u8D44\u5927\u6982\u662F12k \u5DE6\u53F3\u5427\uFF0C\u6BCF\u5E74\u53D1 15\u4E2A\u6708\u7684\u5DE5\u8D44\u3002\u5728\u77E5\u4E4E\u4E0A\u5BF9\u4E09\u4E03\u4E92\u5A31\u7684\u8BA8\u8BBA\u6BD4\u8F83\u591A\uFF0C\u6709\u9ED1\u70B9\uFF0C\u6BCF\u4E2A\u90E8\u95E8\u7684\u60C5\u51B5\u4E5F\u4E0D\u592A\u4E00\u6837\uFF0C\u5927\u5BB6\u53EF\u4EE5\u518D\u53BB\u4E86\u89E3\u4E0B\u5440\u3002</p><p><strong>\u5C0F\u9E4F\u6C7D\u8F66</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-fbcfd7c0-79ad-48c5-ad67-471ff91666a5.png" alt=""></p><p>\u5C0F\u9E4F\u6C7D\u8F66\u6700\u8FD1\u98CE\u5934\u6B63\u76DB\uFF0C\u5E94\u5C4A\u751F\u6821\u62DB\u8FDB\u6765\u7684\u5DE5\u8D44\u57FA\u672C\u5728 16k \u5DE6\u53F3\uFF0C\u6BCF\u5E7415\u85AA\u3002\u5C0F\u9E4F\u6C7D\u8F66\u76EE\u524D\u662F\u5927\u5C0F\u5468\u5440\uFF0C\u5DE5\u4F5C\u5F3A\u5EA6\u8FD8\u662F\u6BD4\u8F83\u5927\u7684\u3002</p><p><strong>\u9177\u72D7\u97F3\u4E50</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-4e3962cb-109e-4f2d-a372-ba325444d415.png" alt=""></p><p>\u9177\u72D7\u97F3\u4E50\u662F\u817E\u8BAF\u7684\u8FD9\u5E94\u8BE5\u5927\u5BB6\u90FD\u77E5\u9053\uFF0C\u4E0D\u8FC7\u5185\u90E8\u7684\u85AA\u8D44\u804C\u7EA7\u4E0D\u662F\u5B8C\u5168\u5BF9\u9F50\u7684\u54C8\u3002\u9177\u72D7\u7684\u4E0D\u540C\u90E8\u95E8\u5DE5\u4F5C\u5F3A\u5EA6\u5DEE\u522B\u5F88\u5927\uFF0C\u6709\u7684\u95F2\u7684\u8981\u6B7B\uFF0C\u6709\u7684\u5FD9\u7684\u8981\u6B7B\u3002\u9009\u62E9\u90E8\u95E8\u65F6\u8981\u6CE8\u610F\u3002</p><p><strong>4399</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-6a8653f4-b840-4f46-af16-72fa00b9019b.png" alt=""></p><p>4399\u5927\u5BB6\u5E94\u8BE5\u90FD\u4E0D\u964C\u751F\uFF0C\u597D\u591A\u5C0F\u6E38\u620F\u90FD\u662F\u4ECE\u5C0F\u5F00\u59CB\u73A9\u7684\uFF0C\u5DE5\u8D44\u4E5F\u572816k\u5DE6\u53F3\u3002</p><p>\u597D\u4E86\uFF0C\u6211\u7B97\u770B\u660E\u767D\u4E86\u3002\u5E7F\u5DDE\u4E92\u8054\u7F51\u8FD9\u8FB9\u9664\u4E86\u51E0\u4E2A\u5934\u90E8\u5927\u5382\uFF0C\u505A\u5F00\u53D1\u7684\u5E94\u5C4A\u751F\u85AA\u8D44\u5DEE\u4E0D\u591A\u5C31\u662F16k\u5440\uFF0C\u611F\u89C9\u6709\u70B9\u4F4E\u3002\u5176\u5B83\u7684\u5728\u5E7F\u5DDE\u8BBE\u70B9\u7684\u4E92\u8054\u7F51\u516C\u53F8\u6211\u76F4\u63A5\u5217\u5230\u4E0B\u9762\u5566\uFF0C\u5B9E\u5728\u5199\u4E0D\u8FC7\u6765\u4E86\uFF0C\u5927\u5BB6\u6709\u5174\u8DA3\u7684\u8BE6\u7EC6\u4E86\u89E3\u5440\u3002</p><p>\u5206\u522B\u6709\uFF1A\u79D1\u5927\u8BAF\u98DE\u3001TCL\u3001\u5C0F\u9E4F\u6C7D\u8F66\u3001\u8354\u679DFM\u3001\u591A\u76CA\u6E38\u620F\u3001\u592A\u5E73\u6D0B\u3001UC\u3001CVTE\u3001\u5C0F\u7C73\uFF08\u76EE\u524D\u6B63\u5728\u5EFA\u8BBE\u4E2D\uFF09\u3001\u534E\u4E3A\uFF08\u6B63\u5728\u5EFA\u8BBE\u4E2D\uFF09</p><h3 id="\u8FD0\u8425\u5546" tabindex="-1"><a class="header-anchor" href="#\u8FD0\u8425\u5546" aria-hidden="true">#</a> \u8FD0\u8425\u5546</h3><p>\u611F\u89C9\u5F85\u9047\u4E00\u822C\uFF0C\u5C31\u662F\u6BD4\u8F83\u8F7B\u677E\uFF0C\u8FFD\u6C42\u8F7B\u677E\u548C\u7A33\u5B9A\u7684\u53EF\u4EE5\u770B\u4E0B\u3002</p><p><strong>\u79FB\u52A8</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-66cca36c-656b-4e6e-9172-f68d79e78af9.png" alt=""></p><p>\u79FB\u52A8\u6BCF\u6708\u7684\u5DE5\u8D44\u5F88\u4F4E\uFF0C\u53EF\u80FD\u5230\u624B\u5C31\u4E94\u516D\u5343\u5757\u94B1\uFF0C\u7136\u540E\u5E74\u5E95\u4F1A\u4E00\u4E0B\u518D\u53D1\u4E94\u516D\u4E07\u7684\u5E74\u7EC8\u5956\uFF0C\u6709\u65F6\u5019\u4F1A\u66F4\u591A\u4E00\u4E9B\u3002\u636E\u8BF4 18 \u5E74\u6548\u76CA\u597D\u5E74\u5E95\u4E00\u4E0B\u53D1\u4E86 8 \u4E07\uFF0C19 \u5E74\u5C31\u62C9\u8DE8\u4E86\u3002</p><p><strong>\u8054\u901A</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-cc0cdb0f-034c-4a63-81f6-a17beed70b14.png" alt=""></p><p>\u8F6C\u6B63\u540E\u6BCF\u6708\u5230\u624B\u516B\u4E5D\u5343\uFF0C\u7EE9\u6548\u597D\u80FD\u5230\u624B\u4E00\u4E07\u5DE6\u53F3\u3002</p><p><strong>\u7535\u4FE1</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-ff7fd7ae-3bf8-4797-bf07-f9490da269b9.png" alt=""></p><p>\u6211\u770B\u5230 offershow \u4E0A\u6709\u505A\u7F51\u7EDC\u8FD0\u7EF4\u7684\u7206\u6599\uFF0C\u5165\u804C\u7B2C\u4E00\u5E74\u6BCF\u6708\u5230\u624B8.5k\uFF0C\u5E74\u7EC8\u53D1\u4E863.5\u4E07\u3002</p><h3 id="\u7814\u7A76\u6240" tabindex="-1"><a class="header-anchor" href="#\u7814\u7A76\u6240" aria-hidden="true">#</a> \u7814\u7A76\u6240</h3><p><strong>\u5DE5\u4FE1\u90E8\u7B2C\u4E94\u7814\u7A76\u6240\uFF08\u8D5B\u5B9D\u5B9E\u9A8C\u5BA4\uFF09</strong></p><p>\u636E\u6211\u6240\u77E5\uFF0C\u5DE5\u4FE1\u90E8\u4E0B\u5C5E\u7684\u7814\u7A76\u6240\u798F\u5229\u5F85\u9047\u5404\u65B9\u9762\u90FD\u662F\u4E0D\u9519\u7684\u3001\u5E73\u53F0\u4E5F\u5F88\u5927\u3002\u4F46\u662F\u6BCF\u4E2A\u90E8\u95E8\u7684\u60C5\u51B5\u4E5F\u5DEE\u8DDD\u5F88\u5927\u5440\uFF0C\u53BB\u7814\u7A76\u6240\u4E00\u5B9A\u8981\u627E\u5230\u90A3\u79CD\u6548\u76CA\u597D\u7684\u90E8\u95E8\uFF0C\u9009\u5BF9\u4E86\u8D77\u98DE\uFF0C\u9009\u4E0D\u5BF9\u5C31\u5751\u4E86\u3002</p><p><strong>\u4E2D\u75357\u6240\uFF08\u5E7F\u5DDE\u901A\u4FE1\u7814\u7A76\u6240\uFF09</strong></p><p>\u6211\u6253\u542C\u4E86\u4E00\u4E0B\uFF0C\u8FD9\u4E2A\u7814\u7A76\u6240\u5DE5\u8D44\u5F85\u9047\u4E0D\u9AD8\uFF0C\u4E5F\u5C31\u662F\u56FE\u4E2A\u8F7B\u677E\u4E86\u3002</p><p>\u6211\u627E\u4E86\u4E0B\u6CA1\u627E\u5230\u822A\u7A7A\u822A\u5929\u7C7B\u5728\u5E7F\u5DDE\u7684\u7814\u7A76\u6240\u3002\u5176\u5B83\u7C7B\u578B\u7684\u7814\u7A76\u6240\u4E5F\u4F1A\u62DB\u8BA1\u7B97\u673A\u76F8\u5173\u4E13\u4E1A\u7684\uFF0C\u76EE\u524D\u8BA1\u7B97\u673A\u4E13\u4E1A\u662F\u4E07\u91D1\u6CB9\uFF0C\u54EA\u91CC\u4E5F\u62DB\uFF0C\u4E0D\u8FC7\u4F60\u8FDB\u4E86\u91CD\u70B9\u4E0D\u662F\u653E\u5728\u8BA1\u7B97\u673A\u884C\u4E1A\u7684\u7814\u7A76\u6240\uFF0C\u6280\u672F\u4E0A\u7684\u53D1\u5C55\u80AF\u5B9A\u4E0D\u592A\u597D\u3002\u5982\u679C\u6709\u6BD4\u8F83\u597D\u7684\u7814\u7A76\u6240\u4E5F\u6B22\u8FCE\u8865\u5145\u5440\u3002</p><h2 id="\u751F\u6D3B\u6210\u672C" tabindex="-1"><a class="header-anchor" href="#\u751F\u6D3B\u6210\u672C" aria-hidden="true">#</a> \u751F\u6D3B\u6210\u672C</h2><h3 id="\u623F\u4EF7" tabindex="-1"><a class="header-anchor" href="#\u623F\u4EF7" aria-hidden="true">#</a> \u623F\u4EF7</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-4b8f3cec-ca0d-4b39-9826-755cd2fe29b6.png" alt=""></p><p>\u5927\u5BB6\u76F4\u63A5\u770B\u56FE\uFF0C\u76F8\u6BD4\u4E8E\u5176\u5B83\u4E00\u7EBF\u57CE\u5E02\u623F\u4EF7\u7B97\u662F\u4FBF\u5B9C\u4E86\u3002\u4F46\u662F\u6309\u7167\u5E7F\u5DDE\u4E92\u8054\u7F51\u7684\u5DE5\u8D44\u6C34\u5E73\u60F3\u5728\u5E7F\u5DDE\u5DEE\u4E0D\u591A\u7684\u533A\u57DF\u548C\u5730\u6BB5\u4E70\u623F\uFF0C\u538B\u529B\u662F\u5F88\u5927\u7684\u3002</p><h3 id="\u6559\u80B2" tabindex="-1"><a class="header-anchor" href="#\u6559\u80B2" aria-hidden="true">#</a> \u6559\u80B2</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-75763e2a-3b9b-48e4-a5dc-b0308d60e98f.png" alt=""></p><p>\u5E7F\u5DDE\u7684985\u5927\u5B66\u6709\u4E24\u6240\uFF0C\u5206\u522B\u662F\u4E2D\u5C71\u5927\u5B66\u548C\u534E\u5357\u7406\u5DE5\uFF0C211\u4E5F\u6709\u4E24\u6240\u662F\u66A8\u5357\u5927\u5B66\u4EE5\u53CA\u534E\u5357\u5E08\u8303\u5927\u5B66\uFF0C\u53E6\u5916\u5E7F\u5DDE\u5927\u5B66\u3001\u5E7F\u4E1C\u5DE5\u4E1A\u5927\u5B66\u7B49\u7B49\u4E5F\u90FD\u4E0D\u9519\u3002\u5E7F\u5DDE\u7684\u9AD8\u4E2D\u4E5F\u5F88\u7ED9\u529B\uFF0C\u534E\u5357\u5E08\u8303\u5927\u5B66\u9644\u5C5E\u4E2D\u5B66\u3001\u5E7F\u4E1C\u5B9E\u9A8C\u4E2D\u5B66\u3001\u5E7F\u4E1C\u5E7F\u96C5\u4E2D\u5B66\u3001\u5E7F\u5DDE\u5E02\u6267\u4FE1\u4E2D\u5B66\u3001\u5E7F\u5DDE\u4E8C\u4E2D\u3001\u516D\u4E2D\u7B49\u7B49\u5B66\u6821\u90FD\u5F88\u4E0D\u9519\u3002</p><h3 id="\u533B\u7597" tabindex="-1"><a class="header-anchor" href="#\u533B\u7597" aria-hidden="true">#</a> \u533B\u7597</h3><p>\u4E00\u7EBF\u57CE\u5E02\u7684\u533B\u7597\u8D44\u6E90\u80AF\u5B9A\u662F\u6CA1\u95EE\u9898\u7684\uFF0C\u6211\u7C97\u7565\u6570\u4E86\u4E00\u4E0B\uFF0C\u5E7F\u5DDE\u6709\u4E0D\u4E0B40\u6240\u4E09\u7532\u533B\u9662\u3002\u6211\u4E86\u89E3\u5230\u9876\u7EA7\u533B\u7597\u8D44\u6E90\u4E3B\u8981\u6709\u4E2D\u5C71\u7CFB\u3001\u5357\u65B9\u7CFB\u3001\u5E7F\u4E2D\u533B\u7CFB\u7B49\u7B49\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-5b5c6c29-cc79-4c0b-be57-b105babd0141.png" alt=""></p><h3 id="\u98CE\u666F-\u7F8E\u98DF" tabindex="-1"><a class="header-anchor" href="#\u98CE\u666F-\u7F8E\u98DF" aria-hidden="true">#</a> \u98CE\u666F&amp;\u7F8E\u98DF</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-4dbf092b-e820-4114-8fd8-ab7e0ac59f8d.png" alt=""></p><p>\u5E7F\u5DDE\u7684\u7F8E\u666F\u81EA\u7136\u4E0D\u7528\u591A\u8BF4\uFF0C\u53E6\u5916\u7A7A\u6C14\u8D28\u91CF\u4E5F\u5F88\u597D\uFF0C\u8BF4\u8D77\u7A7A\u6C14\u8D28\u91CF\uFF0C\u6211\u8FD9\u4E2A\u5317\u65B9\u4EBA\u5DF2\u7ECF\u4E60\u60EF\u51AC\u5929\u7ECF\u5E38\u89C1\u4E0D\u5230\u592A\u9633\u4E86\u3002\u5E7F\u5DDE\u7684\u7F8E\u98DF\u4E5F\u5F88\u591A\uFF0C\u767D\u5207\u9E21\u3001\u7172\u4ED4\u996D\u548C\u80A0\u7C89\u7B49\u7B49\uFF0C\u8FD8\u6709\u5F88\u591A\u6211\u5C31\u4E0D\u62A5\u83DC\u540D\u4E86\uFF0C\u6211\u5728\u897F\u5B89\u4E0A\u5B66\u65F6\u98DF\u5802\u6709\u4E2A\u5356\u80A0\u7C89\u7684\u7A97\u53E3\uFF0C\u6211\u5F88\u7231\u5403\uFF0C\u4E0D\u8FC7\u8FD9\u4E2A\u80A0\u7C89\u660E\u663E\u662F\u672C\u5730\u5316\u4E86\u3002\u8BDD\u8BF4\u5357\u5317\u5DEE\u5F02\u8FD8\u662F\u633A\u5927\u7684\uFF0C\u6211\u4E00\u4E2A\u540C\u5B66\u53BB\u5E7F\u5DDE\u4E0A\u5B66\uFF0C\u53BB\u6D17\u6FA1\u5E26\u7740\u6413\u6FA1\u5DFE\uFF0C\u4ED6\u7684\u5E7F\u5DDE\u820D\u53CB\u90FD\u5341\u5206\u7684\u597D\u5947~ \u5F53\u7136\u5E7F\u5DDE\u7684\u540C\u5B66\u770B\u6211\u62CD\u96EA\u666F\u4E5F\u5F88\u597D\u5947 ~ \u8FD8\u6709\u4E00\u6B21\u5B9E\u9A8C\u5BA4\u548C\u53A6\u95E8\u5927\u5B66\u4E00\u8D77\u5408\u4F5C\u505A\u9879\u76EE\uFF0C\u6211\u548C\u4E00\u4E2A\u53A6\u95E8\u5927\u5B66\u7684\u535A\u58EB\u90FD\u8981\u4E86\u4E00\u4EFD\u8C46\u8150\u8111\uFF0C\u6211\u52A0\u97ED\u83DC\u82B1\uFF0C\u4ED6\u52A0\u7CD6\uFF0C\u6211\u4E24\u9762\u5BF9\u9762\u5750\u7740\u90FD\u89C9\u5F97\u5BF9\u65B9\u7684\u4E0D\u80FD\u5403\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-1e3954bc-0b41-4302-851c-d07d382040cd.png" alt=""></p>',72),d=t("\u4F5C\u8005\uFF1A\u5927\u767D\uFF0C\u8F6C\u8F7D\u94FE\u63A5\uFF1A"),h={href:"https://mp.weixin.qq.com/s/uZQ8p0ytsQFXzt5ppzx6fA",target:"_blank",rel:"noopener noreferrer"},i=t("https://mp.weixin.qq.com/s/uZQ8p0ytsQFXzt5ppzx6fA"),m=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png",alt:""})],-1);function l(f,u){const a=c("ExternalLinkIcon");return p(),o("div",null,[g,e("blockquote",null,[e("p",null,[d,e("a",h,[i,n(a)])])]),m])}var k=r(s,[["render",l],["__file","guangzhou.html.vue"]]);export{k as default};
diff --git a/dist/assets/guangzhou.html.58700f92.js b/dist/assets/guangzhou.html.58700f92.js
new file mode 100644
index 00000000..61c2b37f
--- /dev/null
+++ b/dist/assets/guangzhou.html.58700f92.js
@@ -0,0 +1 @@
+const e={key:"v-3eb2e9b0",path:"/cityselect/guangzhou.html",title:"\u5E7F\u5DDE\u90FD\u6709\u54EA\u4E9B\u503C\u5F97\u52A0\u5165\u7684IT\u4E92\u8054\u7F51\u516C\u53F8\uFF1F",lang:"zh-CN",frontmatter:{shortTitle:"\u5E7F\u5DDE",category:["\u6C42\u804C\u9762\u8BD5"],tag:["\u57CE\u5E02\u9009\u62E9"],summary:"\u5E7F\u5DDE\u90FD\u6709\u54EA\u4E9B\u503C\u5F97\u52A0\u5165\u7684IT\u4E92\u8054\u7F51\u516C\u53F8\uFF1F \u4E0A\u6B21\u53D1\u5B8C\u6DF1\u5733\u7684\uFF0C\u53D1\u73B0\u5E7F\u5DDE\u7684\u547C\u58F0\u6BD4\u8F83\u9AD8\uFF0C\u4E8E\u662F\u6211\u641E\u6765\u4E86\uFF01 \u5E7F\u5DDE\u7684\u4E92\u8054\u7F51\u73AF\u5883\u76F8\u5BF9\u6765\u8BF4\u8FD8\u4E0D\u9519\u3002 \u5E7F\u5DDE\u7684\u7E41\u534E\u4EE5\u53CA\u5B83\u7684\u9B45\u529B\u4E0D\u7528\u6211\u591A\u8BF4\uFF0C\u65E0\u8BBA\u4ECE\u4EBA\u6587\u8FD8\u662F\u4ECE\u7ECF\u6D4E\u6765\u8BF4\u90FD\u662F\u4E0D\u865A\u5176\u5B83\u57CE\u5E02\u7684\u3002\u4E0D\u8FC7\u6211\u5728\u9762\u8BD5\u65F6\u53D1\u73B0\uFF0C\u5E7F\u5DDE\u9664\u4E86\u51E0\u4E2A\u5934\u90E8\u5927\u5382\u662F\u7EDF\u4E00\u85AA\u8D44\u6807\u51C6\u5916\uFF0C\u76F8\u8F83\u4E8E\u5176\u5B83\u4E00\u7EBF\u57CE\u5E02\uFF0C\u5E7F\u5DDE\u7684\u4E92\u8054\u7F51\u884C\u4E1A\u7ED9\u6211\u7684\u611F\u89C9\u662F\u6574\u4F53\u85AA\u8D44\u6C34\u5E73\u504F\u4F4E\u3002 \u5927\u5BB6\u6CE8\u610F\u5440\uFF0C\u5176\u5B9E\u5B66\u8BA1\u7B97\u673A\u76F8\u5173",head:[["meta",{property:"og:url",content:"https://tobebetterjavaer.com/cityselect/guangzhou.html"}],["meta",{property:"og:site_name",content:"Java \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF"}],["meta",{property:"og:title",content:"\u5E7F\u5DDE\u90FD\u6709\u54EA\u4E9B\u503C\u5F97\u52A0\u5165\u7684IT\u4E92\u8054\u7F51\u516C\u53F8\uFF1F"}],["meta",{property:"og:type",content:"article"}],["meta",{property:"og:updated_time",content:"2022-06-11T12:15:48.000Z"}],["meta",{property:"og:locale",content:"zh-CN"}],["meta",{property:"article:tag",content:"\u57CE\u5E02\u9009\u62E9"}],["meta",{property:"article:modified_time",content:"2022-06-11T12:15:48.000Z"}]]},excerpt:"",headers:[{level:2,title:"\u5DE5\u4F5C\u673A\u4F1A",slug:"\u5DE5\u4F5C\u673A\u4F1A",children:[{level:3,title:"\u4E92\u8054\u7F51\u516C\u53F8",slug:"\u4E92\u8054\u7F51\u516C\u53F8",children:[]},{level:3,title:"\u8FD0\u8425\u5546",slug:"\u8FD0\u8425\u5546",children:[]},{level:3,title:"\u7814\u7A76\u6240",slug:"\u7814\u7A76\u6240",children:[]}]},{level:2,title:"\u751F\u6D3B\u6210\u672C",slug:"\u751F\u6D3B\u6210\u672C",children:[{level:3,title:"\u623F\u4EF7",slug:"\u623F\u4EF7",children:[]},{level:3,title:"\u6559\u80B2",slug:"\u6559\u80B2",children:[]},{level:3,title:"\u533B\u7597",slug:"\u533B\u7597",children:[]},{level:3,title:"\u98CE\u666F&\u7F8E\u98DF",slug:"\u98CE\u666F-\u7F8E\u98DF",children:[]}]}],git:{createdTime:164837021e4,updatedTime:1654949748e3,contributors:[{name:"itwanger",email:"www.qing_gee@163.com",commits:4},{name:"\u6C89\u9ED8\u738B\u4E8C",email:"www.qing_gee@163.com",commits:1}]},readingTime:{minutes:8.96,words:2688},filePathRelative:"cityselect/guangzhou.md"};export{e as data};
diff --git a/dist/assets/guangzhou.html.c44755f8.js b/dist/assets/guangzhou.html.c44755f8.js
new file mode 100644
index 00000000..2bd82426
--- /dev/null
+++ b/dist/assets/guangzhou.html.c44755f8.js
@@ -0,0 +1 @@
+import{_ as r}from"./plugin-vue_export-helper.21dcd24c.js";import{r as c,o as p,c as o,a as e,b as n,e as b,d as t}from"./app.615e41d8.js";const s={},g=b('<h1 id="\u5E7F\u5DDE\u90FD\u6709\u54EA\u4E9B\u503C\u5F97\u52A0\u5165\u7684it\u4E92\u8054\u7F51\u516C\u53F8" tabindex="-1"><a class="header-anchor" href="#\u5E7F\u5DDE\u90FD\u6709\u54EA\u4E9B\u503C\u5F97\u52A0\u5165\u7684it\u4E92\u8054\u7F51\u516C\u53F8" aria-hidden="true">#</a> \u5E7F\u5DDE\u90FD\u6709\u54EA\u4E9B\u503C\u5F97\u52A0\u5165\u7684IT\u4E92\u8054\u7F51\u516C\u53F8\uFF1F</h1><p>\u4E0A\u6B21\u53D1\u5B8C\u6DF1\u5733\u7684\uFF0C\u53D1\u73B0\u5E7F\u5DDE\u7684\u547C\u58F0\u6BD4\u8F83\u9AD8\uFF0C\u4E8E\u662F\u6211\u641E\u6765\u4E86\uFF01</p><p>\u5E7F\u5DDE\u7684\u4E92\u8054\u7F51\u73AF\u5883\u76F8\u5BF9\u6765\u8BF4\u8FD8\u4E0D\u9519\u3002</p><p>\u5E7F\u5DDE\u7684\u7E41\u534E\u4EE5\u53CA\u5B83\u7684\u9B45\u529B\u4E0D\u7528\u6211\u591A\u8BF4\uFF0C\u65E0\u8BBA\u4ECE\u4EBA\u6587\u8FD8\u662F\u4ECE\u7ECF\u6D4E\u6765\u8BF4\u90FD\u662F\u4E0D\u865A\u5176\u5B83\u57CE\u5E02\u7684\u3002\u4E0D\u8FC7\u6211\u5728\u9762\u8BD5\u65F6\u53D1\u73B0\uFF0C\u5E7F\u5DDE\u9664\u4E86\u51E0\u4E2A\u5934\u90E8\u5927\u5382\u662F\u7EDF\u4E00\u85AA\u8D44\u6807\u51C6\u5916\uFF0C\u76F8\u8F83\u4E8E\u5176\u5B83\u4E00\u7EBF\u57CE\u5E02\uFF0C\u5E7F\u5DDE\u7684\u4E92\u8054\u7F51\u884C\u4E1A\u7ED9\u6211\u7684\u611F\u89C9\u662F\u6574\u4F53\u85AA\u8D44\u6C34\u5E73\u504F\u4F4E\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-0f0eb358-f7ae-46b9-b070-8b93e401735e.png" alt=""></p><p>\u5927\u5BB6\u6CE8\u610F\u5440\uFF0C\u5176\u5B9E\u5B66\u8BA1\u7B97\u673A\u76F8\u5173\u4E13\u4E1A\u7684\u60F3\u5728\u5E7F\u5DDE\u6323\u94B1\uFF0C\u4E0D\u6B62\u53EF\u4EE5\u901A\u8FC7\u4E92\u8054\u7F51\u516C\u53F8\uFF0C\u4E5F\u53EF\u4EE5\u901A\u8FC7\u5F53\u516C\u52A1\u5458\uFF0C\u6559\u5E08\u7B49\u65B9\u5F0F\u53BB\u6323\u94B1\u5440\u3002\u5E94\u5C4A\u751F\u8003\u8FDB\u4F53\u5236\u5185\u5F53\u516C\u52A1\u5458\uFF0C\u5E74\u85AA\u4E5F20\u591A\u4E07\u5462\uFF0C\u5E76\u4E14\u5404\u65B9\u9762\u798F\u5229\u5F85\u9047\u7EDD\u5BF9\u5230\u4F4D\uFF0C\u76F8\u5F53\u4E0D\u9519\u4E86\u3002\u4E0B\u9762\u6211\u4EEC\u8FD8\u662F\u5206\u4E92\u8054\u7F51\u516C\u53F8\u4EE5\u53CA\u56FD\u4F01\u592E\u4F01\u7814\u7A76\u6240\u4ECB\u7ECD\u5427\u3002</p><p>\u58F0\u660E\u4E00\u4E0B\uFF0C\u4E0B\u9762\u7684\u5185\u5BB9\u4EC5\u4EE3\u8868\u6211\u4E2A\u4EBA\u7684\u8C03\u67E5\u7ED3\u679C\uFF0C\u5982\u679C\u5927\u5BB6\u77E5\u9053\u66F4\u591A\u7684\u4FE1\u606F\uFF0C\u6B22\u8FCE\u8865\u5145\u5440\u3002</p><h2 id="\u5DE5\u4F5C\u673A\u4F1A" tabindex="-1"><a class="header-anchor" href="#\u5DE5\u4F5C\u673A\u4F1A" aria-hidden="true">#</a> \u5DE5\u4F5C\u673A\u4F1A</h2><h3 id="\u4E92\u8054\u7F51\u516C\u53F8" tabindex="-1"><a class="header-anchor" href="#\u4E92\u8054\u7F51\u516C\u53F8" aria-hidden="true">#</a> \u4E92\u8054\u7F51\u516C\u53F8</h3><p><strong>\u7F51\u6613</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-53893155-f8cb-4bfe-b0b4-768c43c03862.png" alt=""></p><p>\u7F51\u6613\u5728\u5E7F\u5DDE\u4E3B\u8981\u662F\u6E38\u620F\u90E8\u95E8\u3002\u7B97\u662F\u7F51\u6613\u7684\u6838\u5FC3\u4E1A\u52A1\u4E86\u3002\u6CE8\u610F\uFF0C\u7F51\u6613\u9762\u8BD5\u65F6\u5019\u662F\u6563\u88C5\u7684\uFF0C\u7F51\u6613\u4E92\u5A31\u3001\u7F51\u6613\u96F7\u706B\u548C\u7F51\u6613\u4E92\u8054\u7F51\u662F\u5206\u5F00\u62DB\u8058\u7684\uFF0C\u6211\u5F53\u65F6\u6295\u7B80\u5386\u90FD\u662F\u5206\u5F00\u7ED9\u4ED6\u4EEC\u6295\u7684\uFF0C\u540C\u6837\u7684\u7B80\u5386\u6211\u5728\u7F51\u7AD9\u4E0A\u586B\u4E86\u4E09\u6B21\uFF0C\u7D2F\u6B7B\u3002\u4E0D\u8FC7\u597D\u5904\u5C31\u662F\u4F60\u6709\u4E09\u6B21\u673A\u4F1A\u80FD\u8FDB\u7F51\u6613 ~ \u6CE8\u610F\uFF0C\u4E92\u5A31\u3001\u96F7\u706B\u3001\u4E92\u8054\u7F51\u7684\u85AA\u8D44\u65B9\u6848\u4E5F\u662F\u4E0D\u4E00\u6837\u7684\u3002\u7F51\u6613\u7684\u85AA\u8D44\u65B9\u6848\u5F88\u590D\u6742\uFF0C\u8FD9\u91CC\u9762\u6C34\u592A\u6DF1\uFF0C\u6211\u611F\u89C9\u6211\u6709\u70B9\u628A\u63E1\u4E0D\u4F4F~ 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alt=""></p><p>\u5E7F\u5DDE\u7684\u5B57\u8282\u6574\u4F53\u4E0A\u4E0D\u5982\u5176\u5B83\u5730\u65B9\u7684\u5B57\u8282\u52A0\u73ED\u4E25\u91CD\uFF0C\u4E0D\u8FC7\u4E5F\u8981\u770B\u90E8\u95E8\uFF0C\u6709\u7684\u90E8\u95E8\u542C\u8BF4\u633A\u7D2F\u7684\u3002\u5B57\u8282\u4E4B\u524D\u4E00\u76F4\u662F\u5927\u5C0F\u5468\uFF0C\u524D\u4E0D\u4E45\u521A\u521A\u5BA3\u5E03\u8981\u53D6\u6D88\u5927\u5C0F\u5468\uFF0C\u6709\u53CC\u4F11\u8FD8\u662F\u633A\u5E78\u798F\u7684\uFF0C\u5C31\u662F\u8981\u5C11\u6323\u4E0D\u5C11\u94B1\u4E86\uFF0C\u770B\u4F60\u662F\u4E0D\u662F\u594B\u6597\u903C\u4E86\u3002\u6211\u770B\u523021\u5C4A\u5B57\u8282\u6821\u62DB\u7684\u85AA\u8D44\u4E3B\u8981\u662F\u6BCF\u670820k\uFF0C22k\uFF0C24k\uFF0C26k\uFF0C28k\uFF0C30k\u4E0D\u7B49\u3002\u4E0D\u8FC7\u6211\u770B\u6821\u62DB\u62FF\u5230\u5E7F\u5DDE\u8FD9\u8FB9offer\u7684\u5927\u90E8\u5206\u662F22k\u548C24k\u7684\u6708\u85AA\uFF0C</p><p><strong>\u6B22\u805A\u65F6\u4EE3</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-7d47dd3b-924e-4af3-99e9-85c77dca3d45.png" alt=""></p><p>\u5927\u5BB6\u770B\u5230\u6B22\u805A\u65F6\u4EE3\u8FD9\u4E2A\u540D\u79F0\u53EF\u80FD\u6709\u70B9\u964C\u751F\uFF0C\u5176\u5B9E YY \u548C \u864E\u7259 \u90FD\u662F\u6B22\u805A\u65F6\u4EE3\u7684\u3002\u6B22\u805A\u65F6\u4EE3\u7684\u85AA\u8D44\u6C34\u5E73\u6211\u4E0D\u6E05\u695A\uFF0C\u6211\u95EE\u4E86\u670B\u53CB\u4E5F\u4E0D\u6E05\u695A\uFF0C\u6211\u5C31\u53BB\u67E5\u6821\u62DB\u85AA\u6C34\u4E0A\u7684\u85AA\u8D44\u7206\u6599\u3002\u6709\u70B9\u8FF7\u5440\uFF0C\u53BB\u5E74\u6821\u62DB\uFF0C\u5F00\u53D1\u65B9\u5411\u7684\u6708\u85AA14k\u300116k\u300118k \u7684\u90FD\u6709\uFF0C\u4F46\u662F\u8FD9\u7B97\u6CD5\u85AA\u8D44\u7684\u7206\u6599\u548B\u8FD8\u76F4\u63A5\u5C31 27k \u5462\uFF1F\u8FD9\u4E5F\u5DEE\u7684\u592A\u591A\u4E86\u5427\u3002\u6709\u9760\u8C31\u6D88\u606F\u7684\u8001\u94C1\u6B22\u8FCE\u6765\u8865\u5145\u3002</p><p><strong>\u552F\u54C1\u4F1A</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-bd501c3a-05ac-4a1e-a27c-7645dc6d8ab0.png" alt=""></p><p>\u552F\u54C1\u4F1A\u7B97\u662F\u5E7F\u5DDE\u672C\u5730\u7684\u4E00\u9738\u4E86\u5427\uFF0C\u552F\u54C1\u4F1A\u7684\u798F\u5229\u633A\u7ED9\u529B\u7684\uFF0C\u5305\u4E09\u9910\uFF0C\u53CC\u4F11\uFF0C\u79DF\u623F\u8865\u8D34\u3002\u672C\u79D1\u751F\u5F00\u53D1\u7684\u6708\u85AA\u4E3B\u8981\u96C6\u4E2D\u572814k-16k\u3002</p><p><strong>SHEIN</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-d805d3a7-a5b8-4e5a-a304-e59cac38baad.png" alt=""></p><p>\u8FD9\u5BB6\u516C\u53F8\u6211\u719F\uFF0C\u6211\u5C31\u7ED9\u4F60\u4EEC\u5C55\u5F00\u8BB2\u8BB2\u3002\u8FD9\u5BB6\u516C\u53F8\u6700\u8FD1\u52BF\u5934\u5F88\u731B\uFF0C\u505A\u8DE8\u5883\u7535\u5546\u7684\uFF0C\u4E3B\u8981\u5356\u5973\u88C5\u3002\u6211\u5728\u53BB\u5E74\u79CB\u62DB\u521D\u671F\u8FD8\u9762\u8BD5\u8FC7\u8FD9\u5BB6\u516C\u53F8\uFF0C\u9762\u8BD5\u96BE\u5EA6\u6BD4\u8F83\u53CB\u597D\u3002\u9996\u5148\u662F hr \u7ED9\u6211\u53D1\u4E86\u4E2A\u7B14\u8BD5\u94FE\u63A5\uFF0C\u8BA9\u6211\u51E0\u5929\u5185\u627E\u4E2A\u65F6\u95F4\u505A\u4E86\u3002\u901A\u8FC7\u7B14\u8BD5\u540E\uFF0C\u7B2C\u4E00\u8F6E\u9762\u8BD5\uFF0C\u9762\u8BD5\u4E86\u5927\u6982\u6709 30 \u591A\u5206\u949F\uFF0C\u4E3B\u8981\u95EE\u4E86\u9879\u76EE\u4EE5\u53CA\u9762\u8BD5\u516B\u80A1\u6587\uFF0C\u6CA1\u6709\u8BA9\u5199\u4EE3\u7801\uFF0C\u7136\u540E\u9762\u8BD5\u5C31\u901A\u8FC7\u4E86\u3002\u7B2C\u4E8C\u8F6E\u9762\u8BD5\uFF0C\u9762\u8BD5\u5B98\u968F\u4FBF\u95EE\u4E86\u4E24\u4E2A\u516B\u80A1\u6587\u95EE\u9898\u5C31\u5F00\u59CB\u804A\u7406\u60F3\u4E86\u3002\u7B2C\u4E09\u8F6E\u9762\u8BD5\u597D\u50CF\u662F\u4ED6\u4EEC\u7684 cto\uFF0C\u95EE\u6211\u9AD8\u8003\u6570\u5B66\u8003\u591A\u5C11\u5206 ~ \u95EE\u6211\u4E0A\u5B66\u671F\u95F4\u5927\u6982\u5199\u4E86\u591A\u5C11\u884C\u4EE3\u7801~ \u7136\u540E\u53C8\u804A\u4E86\u51E0\u53E5\u5C31\u8DDF\u6211\u7ED3\u675F\u9762\u8BD5\u4E86\u3002\u5C31\u7ED9\u6211 offer\u4E86\u3002\u540E\u7EEDhr\u8DDF\u6211\u8C08\u85AA\u7684\u65F6\u5019\u8BF4\u4ED6\u4EEC\u52A0\u73ED\u5C11\uFF0C\u5DE5\u8D44\u662F 16k * 14\uFF0C\u6211\u89C9\u5F97\u5DE5\u8D44\u6709\u70B9\u5C11\uFF0C\u5C31\u6CA1\u63A5offer\u3002</p><p><strong>\u4E09\u4E03\u4E92\u5A31</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-b7f04bcf-684c-4c89-acb2-5dc8907284a8.png" alt=""></p><p>\u6211\u4E86\u89E3\u5230\u4E09\u4E03\u4E92\u5A31\u540E\u7AEF\u5C97\u4F4D\u5927\u90E8\u5206\u662F PHP\uFF0C\u672C\u79D1\u751F\u6821\u62DB\u8FDB\u6765\u85AA\u8D44\u5927\u6982\u662F12k \u5DE6\u53F3\u5427\uFF0C\u6BCF\u5E74\u53D1 15\u4E2A\u6708\u7684\u5DE5\u8D44\u3002\u5728\u77E5\u4E4E\u4E0A\u5BF9\u4E09\u4E03\u4E92\u5A31\u7684\u8BA8\u8BBA\u6BD4\u8F83\u591A\uFF0C\u6709\u9ED1\u70B9\uFF0C\u6BCF\u4E2A\u90E8\u95E8\u7684\u60C5\u51B5\u4E5F\u4E0D\u592A\u4E00\u6837\uFF0C\u5927\u5BB6\u53EF\u4EE5\u518D\u53BB\u4E86\u89E3\u4E0B\u5440\u3002</p><p><strong>\u5C0F\u9E4F\u6C7D\u8F66</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-fbcfd7c0-79ad-48c5-ad67-471ff91666a5.png" alt=""></p><p>\u5C0F\u9E4F\u6C7D\u8F66\u6700\u8FD1\u98CE\u5934\u6B63\u76DB\uFF0C\u5E94\u5C4A\u751F\u6821\u62DB\u8FDB\u6765\u7684\u5DE5\u8D44\u57FA\u672C\u5728 16k \u5DE6\u53F3\uFF0C\u6BCF\u5E7415\u85AA\u3002\u5C0F\u9E4F\u6C7D\u8F66\u76EE\u524D\u662F\u5927\u5C0F\u5468\u5440\uFF0C\u5DE5\u4F5C\u5F3A\u5EA6\u8FD8\u662F\u6BD4\u8F83\u5927\u7684\u3002</p><p><strong>\u9177\u72D7\u97F3\u4E50</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-4e3962cb-109e-4f2d-a372-ba325444d415.png" alt=""></p><p>\u9177\u72D7\u97F3\u4E50\u662F\u817E\u8BAF\u7684\u8FD9\u5E94\u8BE5\u5927\u5BB6\u90FD\u77E5\u9053\uFF0C\u4E0D\u8FC7\u5185\u90E8\u7684\u85AA\u8D44\u804C\u7EA7\u4E0D\u662F\u5B8C\u5168\u5BF9\u9F50\u7684\u54C8\u3002\u9177\u72D7\u7684\u4E0D\u540C\u90E8\u95E8\u5DE5\u4F5C\u5F3A\u5EA6\u5DEE\u522B\u5F88\u5927\uFF0C\u6709\u7684\u95F2\u7684\u8981\u6B7B\uFF0C\u6709\u7684\u5FD9\u7684\u8981\u6B7B\u3002\u9009\u62E9\u90E8\u95E8\u65F6\u8981\u6CE8\u610F\u3002</p><p><strong>4399</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-6a8653f4-b840-4f46-af16-72fa00b9019b.png" alt=""></p><p>4399\u5927\u5BB6\u5E94\u8BE5\u90FD\u4E0D\u964C\u751F\uFF0C\u597D\u591A\u5C0F\u6E38\u620F\u90FD\u662F\u4ECE\u5C0F\u5F00\u59CB\u73A9\u7684\uFF0C\u5DE5\u8D44\u4E5F\u572816k\u5DE6\u53F3\u3002</p><p>\u597D\u4E86\uFF0C\u6211\u7B97\u770B\u660E\u767D\u4E86\u3002\u5E7F\u5DDE\u4E92\u8054\u7F51\u8FD9\u8FB9\u9664\u4E86\u51E0\u4E2A\u5934\u90E8\u5927\u5382\uFF0C\u505A\u5F00\u53D1\u7684\u5E94\u5C4A\u751F\u85AA\u8D44\u5DEE\u4E0D\u591A\u5C31\u662F16k\u5440\uFF0C\u611F\u89C9\u6709\u70B9\u4F4E\u3002\u5176\u5B83\u7684\u5728\u5E7F\u5DDE\u8BBE\u70B9\u7684\u4E92\u8054\u7F51\u516C\u53F8\u6211\u76F4\u63A5\u5217\u5230\u4E0B\u9762\u5566\uFF0C\u5B9E\u5728\u5199\u4E0D\u8FC7\u6765\u4E86\uFF0C\u5927\u5BB6\u6709\u5174\u8DA3\u7684\u8BE6\u7EC6\u4E86\u89E3\u5440\u3002</p><p>\u5206\u522B\u6709\uFF1A\u79D1\u5927\u8BAF\u98DE\u3001TCL\u3001\u5C0F\u9E4F\u6C7D\u8F66\u3001\u8354\u679DFM\u3001\u591A\u76CA\u6E38\u620F\u3001\u592A\u5E73\u6D0B\u3001UC\u3001CVTE\u3001\u5C0F\u7C73\uFF08\u76EE\u524D\u6B63\u5728\u5EFA\u8BBE\u4E2D\uFF09\u3001\u534E\u4E3A\uFF08\u6B63\u5728\u5EFA\u8BBE\u4E2D\uFF09</p><h3 id="\u8FD0\u8425\u5546" tabindex="-1"><a class="header-anchor" href="#\u8FD0\u8425\u5546" aria-hidden="true">#</a> \u8FD0\u8425\u5546</h3><p>\u611F\u89C9\u5F85\u9047\u4E00\u822C\uFF0C\u5C31\u662F\u6BD4\u8F83\u8F7B\u677E\uFF0C\u8FFD\u6C42\u8F7B\u677E\u548C\u7A33\u5B9A\u7684\u53EF\u4EE5\u770B\u4E0B\u3002</p><p><strong>\u79FB\u52A8</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-66cca36c-656b-4e6e-9172-f68d79e78af9.png" alt=""></p><p>\u79FB\u52A8\u6BCF\u6708\u7684\u5DE5\u8D44\u5F88\u4F4E\uFF0C\u53EF\u80FD\u5230\u624B\u5C31\u4E94\u516D\u5343\u5757\u94B1\uFF0C\u7136\u540E\u5E74\u5E95\u4F1A\u4E00\u4E0B\u518D\u53D1\u4E94\u516D\u4E07\u7684\u5E74\u7EC8\u5956\uFF0C\u6709\u65F6\u5019\u4F1A\u66F4\u591A\u4E00\u4E9B\u3002\u636E\u8BF4 18 \u5E74\u6548\u76CA\u597D\u5E74\u5E95\u4E00\u4E0B\u53D1\u4E86 8 \u4E07\uFF0C19 \u5E74\u5C31\u62C9\u8DE8\u4E86\u3002</p><p><strong>\u8054\u901A</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-cc0cdb0f-034c-4a63-81f6-a17beed70b14.png" alt=""></p><p>\u8F6C\u6B63\u540E\u6BCF\u6708\u5230\u624B\u516B\u4E5D\u5343\uFF0C\u7EE9\u6548\u597D\u80FD\u5230\u624B\u4E00\u4E07\u5DE6\u53F3\u3002</p><p><strong>\u7535\u4FE1</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-ff7fd7ae-3bf8-4797-bf07-f9490da269b9.png" alt=""></p><p>\u6211\u770B\u5230 offershow \u4E0A\u6709\u505A\u7F51\u7EDC\u8FD0\u7EF4\u7684\u7206\u6599\uFF0C\u5165\u804C\u7B2C\u4E00\u5E74\u6BCF\u6708\u5230\u624B8.5k\uFF0C\u5E74\u7EC8\u53D1\u4E863.5\u4E07\u3002</p><h3 id="\u7814\u7A76\u6240" tabindex="-1"><a class="header-anchor" href="#\u7814\u7A76\u6240" aria-hidden="true">#</a> \u7814\u7A76\u6240</h3><p><strong>\u5DE5\u4FE1\u90E8\u7B2C\u4E94\u7814\u7A76\u6240\uFF08\u8D5B\u5B9D\u5B9E\u9A8C\u5BA4\uFF09</strong></p><p>\u636E\u6211\u6240\u77E5\uFF0C\u5DE5\u4FE1\u90E8\u4E0B\u5C5E\u7684\u7814\u7A76\u6240\u798F\u5229\u5F85\u9047\u5404\u65B9\u9762\u90FD\u662F\u4E0D\u9519\u7684\u3001\u5E73\u53F0\u4E5F\u5F88\u5927\u3002\u4F46\u662F\u6BCF\u4E2A\u90E8\u95E8\u7684\u60C5\u51B5\u4E5F\u5DEE\u8DDD\u5F88\u5927\u5440\uFF0C\u53BB\u7814\u7A76\u6240\u4E00\u5B9A\u8981\u627E\u5230\u90A3\u79CD\u6548\u76CA\u597D\u7684\u90E8\u95E8\uFF0C\u9009\u5BF9\u4E86\u8D77\u98DE\uFF0C\u9009\u4E0D\u5BF9\u5C31\u5751\u4E86\u3002</p><p><strong>\u4E2D\u75357\u6240\uFF08\u5E7F\u5DDE\u901A\u4FE1\u7814\u7A76\u6240\uFF09</strong></p><p>\u6211\u6253\u542C\u4E86\u4E00\u4E0B\uFF0C\u8FD9\u4E2A\u7814\u7A76\u6240\u5DE5\u8D44\u5F85\u9047\u4E0D\u9AD8\uFF0C\u4E5F\u5C31\u662F\u56FE\u4E2A\u8F7B\u677E\u4E86\u3002</p><p>\u6211\u627E\u4E86\u4E0B\u6CA1\u627E\u5230\u822A\u7A7A\u822A\u5929\u7C7B\u5728\u5E7F\u5DDE\u7684\u7814\u7A76\u6240\u3002\u5176\u5B83\u7C7B\u578B\u7684\u7814\u7A76\u6240\u4E5F\u4F1A\u62DB\u8BA1\u7B97\u673A\u76F8\u5173\u4E13\u4E1A\u7684\uFF0C\u76EE\u524D\u8BA1\u7B97\u673A\u4E13\u4E1A\u662F\u4E07\u91D1\u6CB9\uFF0C\u54EA\u91CC\u4E5F\u62DB\uFF0C\u4E0D\u8FC7\u4F60\u8FDB\u4E86\u91CD\u70B9\u4E0D\u662F\u653E\u5728\u8BA1\u7B97\u673A\u884C\u4E1A\u7684\u7814\u7A76\u6240\uFF0C\u6280\u672F\u4E0A\u7684\u53D1\u5C55\u80AF\u5B9A\u4E0D\u592A\u597D\u3002\u5982\u679C\u6709\u6BD4\u8F83\u597D\u7684\u7814\u7A76\u6240\u4E5F\u6B22\u8FCE\u8865\u5145\u5440\u3002</p><h2 id="\u751F\u6D3B\u6210\u672C" tabindex="-1"><a class="header-anchor" href="#\u751F\u6D3B\u6210\u672C" aria-hidden="true">#</a> \u751F\u6D3B\u6210\u672C</h2><h3 id="\u623F\u4EF7" tabindex="-1"><a class="header-anchor" href="#\u623F\u4EF7" aria-hidden="true">#</a> \u623F\u4EF7</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-4b8f3cec-ca0d-4b39-9826-755cd2fe29b6.png" alt=""></p><p>\u5927\u5BB6\u76F4\u63A5\u770B\u56FE\uFF0C\u76F8\u6BD4\u4E8E\u5176\u5B83\u4E00\u7EBF\u57CE\u5E02\u623F\u4EF7\u7B97\u662F\u4FBF\u5B9C\u4E86\u3002\u4F46\u662F\u6309\u7167\u5E7F\u5DDE\u4E92\u8054\u7F51\u7684\u5DE5\u8D44\u6C34\u5E73\u60F3\u5728\u5E7F\u5DDE\u5DEE\u4E0D\u591A\u7684\u533A\u57DF\u548C\u5730\u6BB5\u4E70\u623F\uFF0C\u538B\u529B\u662F\u5F88\u5927\u7684\u3002</p><h3 id="\u6559\u80B2" tabindex="-1"><a class="header-anchor" href="#\u6559\u80B2" aria-hidden="true">#</a> \u6559\u80B2</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-75763e2a-3b9b-48e4-a5dc-b0308d60e98f.png" alt=""></p><p>\u5E7F\u5DDE\u7684985\u5927\u5B66\u6709\u4E24\u6240\uFF0C\u5206\u522B\u662F\u4E2D\u5C71\u5927\u5B66\u548C\u534E\u5357\u7406\u5DE5\uFF0C211\u4E5F\u6709\u4E24\u6240\u662F\u66A8\u5357\u5927\u5B66\u4EE5\u53CA\u534E\u5357\u5E08\u8303\u5927\u5B66\uFF0C\u53E6\u5916\u5E7F\u5DDE\u5927\u5B66\u3001\u5E7F\u4E1C\u5DE5\u4E1A\u5927\u5B66\u7B49\u7B49\u4E5F\u90FD\u4E0D\u9519\u3002\u5E7F\u5DDE\u7684\u9AD8\u4E2D\u4E5F\u5F88\u7ED9\u529B\uFF0C\u534E\u5357\u5E08\u8303\u5927\u5B66\u9644\u5C5E\u4E2D\u5B66\u3001\u5E7F\u4E1C\u5B9E\u9A8C\u4E2D\u5B66\u3001\u5E7F\u4E1C\u5E7F\u96C5\u4E2D\u5B66\u3001\u5E7F\u5DDE\u5E02\u6267\u4FE1\u4E2D\u5B66\u3001\u5E7F\u5DDE\u4E8C\u4E2D\u3001\u516D\u4E2D\u7B49\u7B49\u5B66\u6821\u90FD\u5F88\u4E0D\u9519\u3002</p><h3 id="\u533B\u7597" tabindex="-1"><a class="header-anchor" href="#\u533B\u7597" aria-hidden="true">#</a> \u533B\u7597</h3><p>\u4E00\u7EBF\u57CE\u5E02\u7684\u533B\u7597\u8D44\u6E90\u80AF\u5B9A\u662F\u6CA1\u95EE\u9898\u7684\uFF0C\u6211\u7C97\u7565\u6570\u4E86\u4E00\u4E0B\uFF0C\u5E7F\u5DDE\u6709\u4E0D\u4E0B40\u6240\u4E09\u7532\u533B\u9662\u3002\u6211\u4E86\u89E3\u5230\u9876\u7EA7\u533B\u7597\u8D44\u6E90\u4E3B\u8981\u6709\u4E2D\u5C71\u7CFB\u3001\u5357\u65B9\u7CFB\u3001\u5E7F\u4E2D\u533B\u7CFB\u7B49\u7B49\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-5b5c6c29-cc79-4c0b-be57-b105babd0141.png" alt=""></p><h3 id="\u98CE\u666F-\u7F8E\u98DF" tabindex="-1"><a class="header-anchor" href="#\u98CE\u666F-\u7F8E\u98DF" aria-hidden="true">#</a> \u98CE\u666F&amp;\u7F8E\u98DF</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-4dbf092b-e820-4114-8fd8-ab7e0ac59f8d.png" alt=""></p><p>\u5E7F\u5DDE\u7684\u7F8E\u666F\u81EA\u7136\u4E0D\u7528\u591A\u8BF4\uFF0C\u53E6\u5916\u7A7A\u6C14\u8D28\u91CF\u4E5F\u5F88\u597D\uFF0C\u8BF4\u8D77\u7A7A\u6C14\u8D28\u91CF\uFF0C\u6211\u8FD9\u4E2A\u5317\u65B9\u4EBA\u5DF2\u7ECF\u4E60\u60EF\u51AC\u5929\u7ECF\u5E38\u89C1\u4E0D\u5230\u592A\u9633\u4E86\u3002\u5E7F\u5DDE\u7684\u7F8E\u98DF\u4E5F\u5F88\u591A\uFF0C\u767D\u5207\u9E21\u3001\u7172\u4ED4\u996D\u548C\u80A0\u7C89\u7B49\u7B49\uFF0C\u8FD8\u6709\u5F88\u591A\u6211\u5C31\u4E0D\u62A5\u83DC\u540D\u4E86\uFF0C\u6211\u5728\u897F\u5B89\u4E0A\u5B66\u65F6\u98DF\u5802\u6709\u4E2A\u5356\u80A0\u7C89\u7684\u7A97\u53E3\uFF0C\u6211\u5F88\u7231\u5403\uFF0C\u4E0D\u8FC7\u8FD9\u4E2A\u80A0\u7C89\u660E\u663E\u662F\u672C\u5730\u5316\u4E86\u3002\u8BDD\u8BF4\u5357\u5317\u5DEE\u5F02\u8FD8\u662F\u633A\u5927\u7684\uFF0C\u6211\u4E00\u4E2A\u540C\u5B66\u53BB\u5E7F\u5DDE\u4E0A\u5B66\uFF0C\u53BB\u6D17\u6FA1\u5E26\u7740\u6413\u6FA1\u5DFE\uFF0C\u4ED6\u7684\u5E7F\u5DDE\u820D\u53CB\u90FD\u5341\u5206\u7684\u597D\u5947~ \u5F53\u7136\u5E7F\u5DDE\u7684\u540C\u5B66\u770B\u6211\u62CD\u96EA\u666F\u4E5F\u5F88\u597D\u5947 ~ \u8FD8\u6709\u4E00\u6B21\u5B9E\u9A8C\u5BA4\u548C\u53A6\u95E8\u5927\u5B66\u4E00\u8D77\u5408\u4F5C\u505A\u9879\u76EE\uFF0C\u6211\u548C\u4E00\u4E2A\u53A6\u95E8\u5927\u5B66\u7684\u535A\u58EB\u90FD\u8981\u4E86\u4E00\u4EFD\u8C46\u8150\u8111\uFF0C\u6211\u52A0\u97ED\u83DC\u82B1\uFF0C\u4ED6\u52A0\u7CD6\uFF0C\u6211\u4E24\u9762\u5BF9\u9762\u5750\u7740\u90FD\u89C9\u5F97\u5BF9\u65B9\u7684\u4E0D\u80FD\u5403\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-1e3954bc-0b41-4302-851c-d07d382040cd.png" alt=""></p>',72),i=t("\u4F5C\u8005\uFF1A\u5927\u767D\uFF0C\u8F6C\u8F7D\u94FE\u63A5\uFF1A"),d={href:"https://mp.weixin.qq.com/s/uZQ8p0ytsQFXzt5ppzx6fA",target:"_blank",rel:"noopener noreferrer"},h=t("https://mp.weixin.qq.com/s/uZQ8p0ytsQFXzt5ppzx6fA"),m=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png",alt:""})],-1);function l(f,u){const a=c("ExternalLinkIcon");return p(),o("div",null,[g,e("blockquote",null,[e("p",null,[i,e("a",d,[h,n(a)])])]),m])}var k=r(s,[["render",l],["__file","guangzhou.html.vue"]]);export{k as default};
diff --git a/dist/assets/guangzhou.html.ce1033cd.js b/dist/assets/guangzhou.html.ce1033cd.js
deleted file mode 100644
index b4168d35..00000000
--- a/dist/assets/guangzhou.html.ce1033cd.js
+++ /dev/null
@@ -1 +0,0 @@
-const e={key:"v-3eb2e9b0",path:"/cityselect/guangzhou.html",title:"\u60F3\u53BB\u5E7F\u5DDE\u4E86\uFF01",lang:"zh-CN",frontmatter:{category:["\u6C42\u804C\u9762\u8BD5"],tag:["\u57CE\u5E02\u9009\u62E9"],summary:"\u60F3\u53BB\u5E7F\u5DDE\u4E86\uFF01 \u4E0A\u6B21\u53D1\u5B8C\u6DF1\u5733\u7684\uFF0C\u53D1\u73B0\u5E7F\u5DDE\u7684\u547C\u58F0\u6BD4\u8F83\u9AD8\uFF0C\u4E8E\u662F\u6211\u641E\u6765\u4E86\uFF01 \u5E7F\u5DDE\u7684\u4E92\u8054\u7F51\u73AF\u5883\u76F8\u5BF9\u6765\u8BF4\u8FD8\u4E0D\u9519\u3002 \u5E7F\u5DDE\u7684\u7E41\u534E\u4EE5\u53CA\u5B83\u7684\u9B45\u529B\u4E0D\u7528\u6211\u591A\u8BF4\uFF0C\u65E0\u8BBA\u4ECE\u4EBA\u6587\u8FD8\u662F\u4ECE\u7ECF\u6D4E\u6765\u8BF4\u90FD\u662F\u4E0D\u865A\u5176\u5B83\u57CE\u5E02\u7684\u3002\u4E0D\u8FC7\u6211\u5728\u9762\u8BD5\u65F6\u53D1\u73B0\uFF0C\u5E7F\u5DDE\u9664\u4E86\u51E0\u4E2A\u5934\u90E8\u5927\u5382\u662F\u7EDF\u4E00\u85AA\u8D44\u6807\u51C6\u5916\uFF0C\u76F8\u8F83\u4E8E\u5176\u5B83\u4E00\u7EBF\u57CE\u5E02\uFF0C\u5E7F\u5DDE\u7684\u4E92\u8054\u7F51\u884C\u4E1A\u7ED9\u6211\u7684\u611F\u89C9\u662F\u6574\u4F53\u85AA\u8D44\u6C34\u5E73\u504F\u4F4E\u3002 \u5927\u5BB6\u6CE8\u610F\u5440\uFF0C\u5176\u5B9E\u5B66\u8BA1\u7B97\u673A\u76F8\u5173\u4E13\u4E1A\u7684\u60F3\u5728\u5E7F\u5DDE\u6323\u94B1\uFF0C\u4E0D\u6B62\u53EF",head:[["meta",{property:"og:url",content:"https://tobebetterjavaer.com/cityselect/guangzhou.html"}],["meta",{property:"og:site_name",content:"Java \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF"}],["meta",{property:"og:title",content:"\u60F3\u53BB\u5E7F\u5DDE\u4E86\uFF01"}],["meta",{property:"og:type",content:"article"}],["meta",{property:"og:updated_time",content:"2022-05-13T23:14:28.000Z"}],["meta",{property:"og:locale",content:"zh-CN"}],["meta",{property:"article:tag",content:"\u57CE\u5E02\u9009\u62E9"}],["meta",{property:"article:modified_time",content:"2022-05-13T23:14:28.000Z"}]]},excerpt:"",headers:[{level:2,title:"\u5DE5\u4F5C\u673A\u4F1A",slug:"\u5DE5\u4F5C\u673A\u4F1A",children:[{level:3,title:"\u4E92\u8054\u7F51\u516C\u53F8",slug:"\u4E92\u8054\u7F51\u516C\u53F8",children:[]},{level:3,title:"\u8FD0\u8425\u5546",slug:"\u8FD0\u8425\u5546",children:[]},{level:3,title:"\u7814\u7A76\u6240",slug:"\u7814\u7A76\u6240",children:[]}]},{level:2,title:"\u751F\u6D3B\u6210\u672C",slug:"\u751F\u6D3B\u6210\u672C",children:[{level:3,title:"\u623F\u4EF7",slug:"\u623F\u4EF7",children:[]},{level:3,title:"\u6559\u80B2",slug:"\u6559\u80B2",children:[]},{level:3,title:"\u533B\u7597",slug:"\u533B\u7597",children:[]},{level:3,title:"\u98CE\u666F&\u7F8E\u98DF",slug:"\u98CE\u666F-\u7F8E\u98DF",children:[]}]}],git:{createdTime:164837021e4,updatedTime:1652483668e3,contributors:[{name:"itwanger",email:"www.qing_gee@163.com",commits:3},{name:"\u6C89\u9ED8\u738B\u4E8C",email:"www.qing_gee@163.com",commits:1}]},readingTime:{minutes:8.92,words:2676},filePathRelative:"cityselect/guangzhou.md"};export{e as data};
diff --git a/dist/assets/guava.html.1f12859a.js b/dist/assets/guava.html.bbc48258.js
similarity index 99%
rename from dist/assets/guava.html.1f12859a.js
rename to dist/assets/guava.html.bbc48258.js
index 843c7ff2..10c59e8e 100644
--- a/dist/assets/guava.html.1f12859a.js
+++ b/dist/assets/guava.html.bbc48258.js
@@ -1,4 +1,4 @@
-import{_ as p}from"./plugin-vue_export-helper.21dcd24c.js";import{r as e,o,c,a as s,b as l,e as a,d as n}from"./app.a0271b9c.js";const i={},u=a(`<h1 id="google\u5F00\u6E90\u7684guava\u5DE5\u5177\u5E93-\u592A\u5F3A\u5927\u4E86" tabindex="-1"><a class="header-anchor" href="#google\u5F00\u6E90\u7684guava\u5DE5\u5177\u5E93-\u592A\u5F3A\u5927\u4E86" aria-hidden="true">#</a> Google\u5F00\u6E90\u7684Guava\u5DE5\u5177\u5E93\uFF0C\u592A\u5F3A\u5927\u4E86</h1><h3 id="_01\u3001\u524D\u4E16\u4ECA\u751F" tabindex="-1"><a class="header-anchor" href="#_01\u3001\u524D\u4E16\u4ECA\u751F" aria-hidden="true">#</a> 01\u3001\u524D\u4E16\u4ECA\u751F</h3><p>\u4F60\u597D\u5440\uFF0C\u6211\u662F Guava\u3002</p><p>\u6211\u7531 Google \u516C\u53F8\u5F00\u6E90\uFF0C\u76EE\u524D\u5728 GitHub \u4E0A\u5DF2\u7ECF\u6709 39.9k \u7684\u94C1\u7C89\u4E86\uFF0C\u7531\u6B64\u53EF\u4EE5\u8BC1\u660E\u6211\u7684\u53D7\u6B22\u8FCE\u7A0B\u5EA6\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/common-tool/guava-01.png" alt=""></p><p>\u6211\u7684\u8EAB\u4F53\u91CC\u4E3B\u8981\u5305\u542B\u6709\u8FD9\u4E9B\u5E38\u7528\u7684\u6A21\u5757\uFF1A\u96C6\u5408 [collections] \u3001\u7F13\u5B58 [caching] \u3001\u539F\u751F\u7C7B\u578B\u652F\u6301 [primitives support] \u3001\u5E76\u53D1\u5E93 [concurrency libraries] \u3001\u901A\u7528\u6CE8\u89E3 [common annotations] \u3001\u5B57\u7B26\u4E32\u5904\u7406 [string processing] \u3001I/O \u7B49\u3002\u65B0\u7248\u7684 JDK \u4E2D\u5DF2\u7ECF\u76F4\u63A5\u628A\u6211\u5F15\u5165\u4E86\uFF0C\u53EF\u60F3\u800C\u77E5\u6211\u6709\u591A\u4F18\u79C0\uFF0C\u5FCD\u4E0D\u4F4F\u9A84\u50B2\u4E86\u3002</p><p>\u8FD9\u4E48\u8BF4\u5427\uFF0C\u5B66\u597D\u5982\u4F55\u4F7F\u7528\u6211\uFF0C\u80FD\u8BA9\u4F60\u5728\u7F16\u7A0B\u4E2D\u53D8\u5F97\u66F4\u5FEB\u4E50\uFF0C\u5199\u51FA\u66F4\u4F18\u96C5\u7684\u4EE3\u7801\uFF01</p><p><em>PS\uFF1Astar \u8FD9\u79CD\u4E8B\uFF0C\u53EA\u80FD\u6C42\uFF0C\u4E0D\u6C42\u6CA1\u6548\u679C\u{1F62D}\u{1F62D}\u{1F62D}\u3002\u4E8C\u54E5\u5F00\u6E90\u7684\u300AJava \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF\u300B\u4E13\u680F\u5728 GitHub \u4E0A\u5DF2\u7ECF\u6536\u83B7\u4E86 595 \u679A\u661F\u6807\uFF0C\u94C1\u7C89\u4EEC\u8D76\u7D27\u53BB\u70B9\u70B9\u5566\uFF0C\u5E2E\u4E8C\u54E5\u51B2 600 star\uFF0C\u7B14\u82AF</em>\uFF01</p><blockquote><p>https://github.com/itwanger/toBeBetterJavaer</p></blockquote><h3 id="_02\u3001\u5F15\u5165-guava" tabindex="-1"><a class="header-anchor" href="#_02\u3001\u5F15\u5165-guava" aria-hidden="true">#</a> 02\u3001\u5F15\u5165 Guava</h3><p>\u5982\u679C\u4F60\u8981\u5728 Maven \u9879\u76EE\u4F7F\u7528\u6211\u7684\u8BDD\uFF0C\u9700\u8981\u5148\u5728 pom.xml \u6587\u4EF6\u4E2D\u5F15\u5165\u6211\u7684\u4F9D\u8D56\u3002</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
+import{_ as p}from"./plugin-vue_export-helper.21dcd24c.js";import{r as e,o,c,a as s,b as l,e as a,d as n}from"./app.615e41d8.js";const i={},u=a(`<h1 id="google\u5F00\u6E90\u7684guava\u5DE5\u5177\u5E93-\u592A\u5F3A\u5927\u4E86" tabindex="-1"><a class="header-anchor" href="#google\u5F00\u6E90\u7684guava\u5DE5\u5177\u5E93-\u592A\u5F3A\u5927\u4E86" aria-hidden="true">#</a> Google\u5F00\u6E90\u7684Guava\u5DE5\u5177\u5E93\uFF0C\u592A\u5F3A\u5927\u4E86</h1><h3 id="_01\u3001\u524D\u4E16\u4ECA\u751F" tabindex="-1"><a class="header-anchor" href="#_01\u3001\u524D\u4E16\u4ECA\u751F" aria-hidden="true">#</a> 01\u3001\u524D\u4E16\u4ECA\u751F</h3><p>\u4F60\u597D\u5440\uFF0C\u6211\u662F Guava\u3002</p><p>\u6211\u7531 Google \u516C\u53F8\u5F00\u6E90\uFF0C\u76EE\u524D\u5728 GitHub \u4E0A\u5DF2\u7ECF\u6709 39.9k \u7684\u94C1\u7C89\u4E86\uFF0C\u7531\u6B64\u53EF\u4EE5\u8BC1\u660E\u6211\u7684\u53D7\u6B22\u8FCE\u7A0B\u5EA6\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/common-tool/guava-01.png" alt=""></p><p>\u6211\u7684\u8EAB\u4F53\u91CC\u4E3B\u8981\u5305\u542B\u6709\u8FD9\u4E9B\u5E38\u7528\u7684\u6A21\u5757\uFF1A\u96C6\u5408 [collections] \u3001\u7F13\u5B58 [caching] \u3001\u539F\u751F\u7C7B\u578B\u652F\u6301 [primitives support] \u3001\u5E76\u53D1\u5E93 [concurrency libraries] \u3001\u901A\u7528\u6CE8\u89E3 [common annotations] \u3001\u5B57\u7B26\u4E32\u5904\u7406 [string processing] \u3001I/O \u7B49\u3002\u65B0\u7248\u7684 JDK \u4E2D\u5DF2\u7ECF\u76F4\u63A5\u628A\u6211\u5F15\u5165\u4E86\uFF0C\u53EF\u60F3\u800C\u77E5\u6211\u6709\u591A\u4F18\u79C0\uFF0C\u5FCD\u4E0D\u4F4F\u9A84\u50B2\u4E86\u3002</p><p>\u8FD9\u4E48\u8BF4\u5427\uFF0C\u5B66\u597D\u5982\u4F55\u4F7F\u7528\u6211\uFF0C\u80FD\u8BA9\u4F60\u5728\u7F16\u7A0B\u4E2D\u53D8\u5F97\u66F4\u5FEB\u4E50\uFF0C\u5199\u51FA\u66F4\u4F18\u96C5\u7684\u4EE3\u7801\uFF01</p><p><em>PS\uFF1Astar \u8FD9\u79CD\u4E8B\uFF0C\u53EA\u80FD\u6C42\uFF0C\u4E0D\u6C42\u6CA1\u6548\u679C\u{1F62D}\u{1F62D}\u{1F62D}\u3002\u4E8C\u54E5\u5F00\u6E90\u7684\u300AJava \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF\u300B\u4E13\u680F\u5728 GitHub \u4E0A\u5DF2\u7ECF\u6536\u83B7\u4E86 595 \u679A\u661F\u6807\uFF0C\u94C1\u7C89\u4EEC\u8D76\u7D27\u53BB\u70B9\u70B9\u5566\uFF0C\u5E2E\u4E8C\u54E5\u51B2 600 star\uFF0C\u7B14\u82AF</em>\uFF01</p><blockquote><p>https://github.com/itwanger/toBeBetterJavaer</p></blockquote><h3 id="_02\u3001\u5F15\u5165-guava" tabindex="-1"><a class="header-anchor" href="#_02\u3001\u5F15\u5165-guava" aria-hidden="true">#</a> 02\u3001\u5F15\u5165 Guava</h3><p>\u5982\u679C\u4F60\u8981\u5728 Maven \u9879\u76EE\u4F7F\u7528\u6211\u7684\u8BDD\uFF0C\u9700\u8981\u5148\u5728 pom.xml \u6587\u4EF6\u4E2D\u5F15\u5165\u6211\u7684\u4F9D\u8D56\u3002</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
     &lt;groupId&gt;com.google.guava&lt;/groupId&gt;
     &lt;artifactId&gt;guava&lt;/artifactId&gt;
     &lt;version&gt;30.1-jre&lt;/version&gt;
diff --git a/dist/assets/haibukuaiyongmybatisplusshoubashoujiaoni.html.5f5e650f.js b/dist/assets/haibukuaiyongmybatisplusshoubashoujiaoni.html.6feacfb3.js
similarity index 99%
rename from dist/assets/haibukuaiyongmybatisplusshoubashoujiaoni.html.5f5e650f.js
rename to dist/assets/haibukuaiyongmybatisplusshoubashoujiaoni.html.6feacfb3.js
index 8a983c35..5b6ad20e 100644
--- a/dist/assets/haibukuaiyongmybatisplusshoubashoujiaoni.html.5f5e650f.js
+++ b/dist/assets/haibukuaiyongmybatisplusshoubashoujiaoni.html.6feacfb3.js
@@ -1,4 +1,4 @@
-import{_ as t}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o as c,c as o,a as n,b as e,d as s,e as l}from"./app.a0271b9c.js";const i={},u=n("hr",null,null,-1),d=n("h2",{id:"theme-fancy",tabindex:"-1"},[n("a",{class:"header-anchor",href:"#theme-fancy","aria-hidden":"true"},"#"),s(" theme: fancy")],-1),r=n("p",null,'\u300C\u8FD9\u662F\u6211\u53C2\u4E0E2022\u9996\u6B21\u66F4\u6587\u6311\u6218\u7684\u7B2C2\u5929\uFF0C\u6D3B\u52A8\u8BE6\u60C5\u67E5\u770B\uFF1A[2022\u9996\u6B21\u66F4\u6587\u6311\u6218](https://juejin.cn/post/7052884569032392740 "https://juejin.cn/post/7052884569032392740")\u300D',-1),k=n("p",null,"\u672C\u6587\u4E3B\u8981\u4ECB\u7ECDmybatis-plus\u8FD9\u6B3E\u63D2\u4EF6\uFF0C\u9488\u5BF9springboot\u7528\u6237\u3002\u5305\u62EC\u5F15\u5165\uFF0C\u914D\u7F6E\uFF0C\u4F7F\u7528\uFF0C\u4EE5\u53CA\u6269\u5C55\u7B49\u5E38\u7528\u7684\u65B9\u9762\u505A\u4E00\u4E2A\u6C47\u603B\u6574\u7406\uFF0C\u5C3D\u91CF\u5305\u542B\u5927\u5BB6\u5E38\u7528\u7684\u573A\u666F\u5185\u5BB9\u3002",-1),m=s("\u672C\u6587\u9879\u76EE\u4EE3\u7801gitee\u5730\u5740:\xA0"),v={href:"https://gitee.com/wei_rong_xin/rob-necessities.git",target:"_blank",rel:"noopener noreferrer"},b=s("https://gitee.com/wei_rong_xin/rob-necessities.git"),g=s("\u5173\u4E8Emybatis-plus\u662F\u4EC0\u4E48\uFF0C\u4E0D\u591A\u505A\u4ECB\u7ECD\u4E86\uFF0C\u770B\u5B98\u65B9\u6587\u6863\uFF1A"),y={href:"https://baomidou.com/",target:"_blank",rel:"noopener noreferrer"},w=s("https://baomidou.com/"),h=s("\uFF0C\u54B1\u4EEC\u76F4\u63A5\u4EE3\u7801\u64B8\u8D77\u6765\u3002"),f=n("h1",{id:"\u4E00\u3001\u5FEB\u901F\u5F00\u59CB",tabindex:"-1"},[n("a",{class:"header-anchor",href:"#\u4E00\u3001\u5FEB\u901F\u5F00\u59CB","aria-hidden":"true"},"#"),s(" \u4E00\u3001\u5FEB\u901F\u5F00\u59CB")],-1),_=s("\u672C\u6587\u57FA\u4E8Espringboot\u3001maven\u3001jdk1.8\u3001mysql\u5F00\u53D1\uFF0C\u6240\u4EE5\u5F00\u59CB\u524D\u6211\u4EEC\u9700\u8981\u51C6\u5907\u597D\u8FD9\u5957\u73AF\u5883\u3002\u6211\u7684\u73AF\u5883\u4F7F\u7528\u4E86nacos\u4F5C\u4E3A\u6CE8\u518C\u4E2D\u5FC3\uFF0C\u4E0D\u4E86\u89E3\u6216\u9700\u8981\u642D\u5EFA\u7684\u53C2\u8003\uFF1A"),q={href:"https://juejin.cn/post/7053977860612030477",target:"_blank",rel:"noopener noreferrer"},T=s("nacos2.0\u642D\u5EFA\u4E0E\u914D\u7F6E"),x=n("p",null,"\u65B0\u5EFA\u5982\u4E0B\u6570\u636E\u5E93\uFF1A",-1),j=n("p",null,[n("img",{src:"https://p9-juejin.byteimg.com/tos-cn-i-k3u1fbpfcp/6ebfb19ffe4446e3b3c2a2367e334206~tplv-k3u1fbpfcp-watermark.image?",alt:"image.png"})],-1),I=n("p",null,"\u5EFA\u8BAE\u5927\u5BB6\u9009\u62E9utf8mb4\u8FD9\u79CD\u5B57\u7B26\u96C6\uFF0C\u505A\u8FC7\u5FAE\u4FE1\u7684\u540C\u5B66\u5E94\u8BE5\u4F1A\u77E5\u9053\uFF0C\u5FAE\u4FE1\u7528\u6237\u540D\u79F0\u7684\u8868\u60C5\uFF0C\u662F\u9700\u8981\u8FD9\u79CD\u5B57\u7B26\u96C6\u624D\u80FD\u5B58\u50A8\u7684\u3002",-1),S=n("p",null,"\u6211\u5C31\u9ED8\u8BA4\u5176\u4ED6\u73AF\u5883\u5DF2\u7ECF\u51C6\u5907\u597D\u4E86\uFF0C\u54B1\u4EEC\u76F4\u63A5\u4ECEmybatis-plus\u5F00\u59CB\u3002",-1),E=n("h2",{id:"_1-1-\u4F9D\u8D56\u51C6\u5907",tabindex:"-1"},[n("a",{class:"header-anchor",href:"#_1-1-\u4F9D\u8D56\u51C6\u5907","aria-hidden":"true"},"#"),s(" 1.1 \u4F9D\u8D56\u51C6\u5907")],-1),O=s("\u60F3\u8981\u4EC0\u4E48\u4F9D\u8D56\u7248\u672C\u7684\u53BBmaven\u4ED3\u5E93\u67E5\u770B\uFF1A"),D={href:"https://mvnrepository.com/",target:"_blank",rel:"noopener noreferrer"},U=s("maven\u4ED3\u5E93\u5730\u5740"),N=l(`<p>\u5F15\u5165mybatis-plus\u4F9D\u8D56\uFF1A</p><div class="language-xml ext-xml line-numbers-mode"><pre class="language-xml"><code><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>dependency</span><span class="token punctuation">&gt;</span></span>
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     <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>groupId</span><span class="token punctuation">&gt;</span></span>com.baomidou<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>groupId</span><span class="token punctuation">&gt;</span></span>
     <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>artifactId</span><span class="token punctuation">&gt;</span></span>mybatis-plus-boot-starter<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>artifactId</span><span class="token punctuation">&gt;</span></span>
     <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>version</span><span class="token punctuation">&gt;</span></span>3.5.0<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>version</span><span class="token punctuation">&gt;</span></span>
diff --git a/dist/assets/hangzhou.html.52f2ce43.js b/dist/assets/hangzhou.html.52f2ce43.js
new file mode 100644
index 00000000..e70d4df7
--- /dev/null
+++ b/dist/assets/hangzhou.html.52f2ce43.js
@@ -0,0 +1 @@
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diff --git a/dist/assets/hangzhou.html.9719a0ea.js b/dist/assets/hangzhou.html.9719a0ea.js
deleted file mode 100644
index a3d54d3e..00000000
--- a/dist/assets/hangzhou.html.9719a0ea.js
+++ /dev/null
@@ -1 +0,0 @@
-const e={key:"v-697611a4",path:"/cityselect/hangzhou.html",title:"\u676D\u5DDE\u6709\u54EA\u4E9B\u9876\u7EA7\u7684\u4E92\u8054\u7F51\u516C\u53F8\uFF1F",lang:"zh-CN",frontmatter:{category:["\u6C42\u804C\u9762\u8BD5"],tag:["\u57CE\u5E02\u9009\u62E9"],summary:"\u676D\u5DDE\u6709\u54EA\u4E9B\u9876\u7EA7\u7684\u4E92\u8054\u7F51\u516C\u53F8\uFF1F \u5927\u5BB6\u597D\uFF0C\u6211\u662F\u4E8C\u54E5\u5440\uFF01\u4E0A\u671F\u53D1\u4E86\u5357\u4EAC\u7684\u4E92\u8054\u7F51\u516C\u53F8\u540E\uFF0C\u676D\u5DDE\u7684\u547C\u58F0\u975E\u5E38\u9AD8\u3002 \u6709\u5C0F\u4F19\u4F34\u5728\u516C\u4F17\u53F7\u540E\u53F0\u79C1\u4FE1\u50AC\uFF0C\u8FD8\u6709\u5C0F\u4F19\u4F34\u5728\u4E8C\u54E5\u7684\u300AJava \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF\u300B\u7684\u5F00\u6E90\u4E13\u680F\u63D0\u4EA4\u4E86 issue\uFF0C\u90A3\u4ECA\u5929\u5FC5\u987B\u5F97\u6765\u6574\u4E00\u6CE2\u4E86\u3002 \u676D\u5DDE\u7684\u4E92\u8054\u7F51\u516C\u53F8\u6BD4\u8F83\u591A\uFF0C\u6211\u5148\u5217\u4E3E\u4E00\u4E9B\u5927\u5BB6\u7785\u7785\uFF08\u90E8\u5206\u6570\u636E\u6765\u6E90\u4E8E\u597D\u670B\u53CB Carl \u7684\u7EDF\u8BA1\uFF09\u3002 \u4E00\u7EBF\u7684\u4E92\u8054\u7F51\u516C\u53F8\u6709\uFF1A \u963F\u91CC\u5DF4\u5DF4\uFF08\u603B\u90E8\uFF09; ",head:[["meta",{property:"og:url",content:"https://tobebetterjavaer.com/cityselect/hangzhou.html"}],["meta",{property:"og:site_name",content:"Java \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF"}],["meta",{property:"og:title",content:"\u676D\u5DDE\u6709\u54EA\u4E9B\u9876\u7EA7\u7684\u4E92\u8054\u7F51\u516C\u53F8\uFF1F"}],["meta",{property:"og:type",content:"article"}],["meta",{property:"og:updated_time",content:"2022-05-13T23:14:28.000Z"}],["meta",{property:"og:locale",content:"zh-CN"}],["meta",{property:"article:tag",content:"\u57CE\u5E02\u9009\u62E9"}],["meta",{property:"article:modified_time",content:"2022-05-13T23:14:28.000Z"}]]},excerpt:"",headers:[{level:3,title:"\u5B57\u8282\u8DF3\u52A8",slug:"\u5B57\u8282\u8DF3\u52A8",children:[]},{level:3,title:"\u963F\u91CC\u7CFB",slug:"\u963F\u91CC\u7CFB",children:[]},{level:3,title:"\u4EAC\u4E1C",slug:"\u4EAC\u4E1C",children:[]},{level:3,title:"\u7F51\u6613",slug:"\u7F51\u6613",children:[]},{level:3,title:"\u534E\u4E3A",slug:"\u534E\u4E3A",children:[]},{level:3,title:"\u4E2D\u79FB\u676D\u7814",slug:"\u4E2D\u79FB\u676D\u7814",children:[]},{level:3,title:"\u4E4B\u6C5F\u5B9E\u9A8C\u5BA4",slug:"\u4E4B\u6C5F\u5B9E\u9A8C\u5BA4",children:[]},{level:3,title:"\u540C\u82B1\u987A",slug:"\u540C\u82B1\u987A",children:[]},{level:3,title:"51 \u4FE1\u7528\u5361",slug:"_51-\u4FE1\u7528\u5361",children:[]},{level:3,title:"\u8611\u83C7\u8857",slug:"\u8611\u83C7\u8857",children:[]},{level:3,title:"\u6709\u8D5E",slug:"\u6709\u8D5E",children:[]},{level:3,title:"Zoom",slug:"zoom",children:[]},{level:3,title:"Cisco(\u601D\u79D1)",slug:"cisco-\u601D\u79D1",children:[]}],git:{createdTime:16449774e5,updatedTime:1652483668e3,contributors:[{name:"itwanger",email:"www.qing_gee@163.com",commits:4},{name:"\u6C89\u9ED8\u738B\u4E8C",email:"www.qing_gee@163.com",commits:1}]},readingTime:{minutes:12.89,words:3868},filePathRelative:"cityselect/hangzhou.md"};export{e as data};
diff --git a/dist/assets/hangzhou.html.a9b39480.js b/dist/assets/hangzhou.html.a9b39480.js
new file mode 100644
index 00000000..e0cee582
--- /dev/null
+++ b/dist/assets/hangzhou.html.a9b39480.js
@@ -0,0 +1 @@
+import{_ as a}from"./plugin-vue_export-helper.21dcd24c.js";import{r as t,o as r,c as o,a as i,b as h,e as c,d as l}from"./app.615e41d8.js";const n={},s=c('<h1 id="\u676D\u5DDE\u90FD\u6709\u54EA\u4E9B\u503C\u5F97\u52A0\u5165\u7684it\u4E92\u8054\u7F51\u516C\u53F8" tabindex="-1"><a class="header-anchor" href="#\u676D\u5DDE\u90FD\u6709\u54EA\u4E9B\u503C\u5F97\u52A0\u5165\u7684it\u4E92\u8054\u7F51\u516C\u53F8" aria-hidden="true">#</a> \u676D\u5DDE\u90FD\u6709\u54EA\u4E9B\u503C\u5F97\u52A0\u5165\u7684IT\u4E92\u8054\u7F51\u516C\u53F8\uFF1F</h1><p>\u5927\u5BB6\u597D\uFF0C\u6211\u662F\u4E8C\u54E5\u5440\uFF01\u4E0A\u671F\u53D1\u4E86\u5357\u4EAC\u7684\u4E92\u8054\u7F51\u516C\u53F8\u540E\uFF0C\u676D\u5DDE\u7684\u547C\u58F0\u975E\u5E38\u9AD8\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/hangzhou-1.png" alt=""></p><p>\u6709\u5C0F\u4F19\u4F34\u5728\u516C\u4F17\u53F7\u540E\u53F0\u79C1\u4FE1\u50AC\uFF0C\u8FD8\u6709\u5C0F\u4F19\u4F34\u5728\u4E8C\u54E5\u7684\u300AJava \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF\u300B\u7684\u5F00\u6E90\u4E13\u680F\u63D0\u4EA4\u4E86 issue\uFF0C\u90A3\u4ECA\u5929\u5FC5\u987B\u5F97\u6765\u6574\u4E00\u6CE2\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/hangzhou-2.png" alt=""></p><p>\u676D\u5DDE\u7684\u4E92\u8054\u7F51\u516C\u53F8\u6BD4\u8F83\u591A\uFF0C\u6211\u5148\u5217\u4E3E\u4E00\u4E9B\u5927\u5BB6\u7785\u7785\uFF08\u90E8\u5206\u6570\u636E\u6765\u6E90\u4E8E\u597D\u670B\u53CB Carl 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src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/hangzhou-3.png" alt=""></p><ul><li>\u300C\u57FA\u672C\u60C5\u51B5\u300D \uFF1A\u5B57\u8282\u603B\u90E8\u5728\u5317\u4EAC\uFF0C\u5728\u4E0A\u6D77\u3001\u6DF1\u5733\u3001\u676D\u5DDE\u3001\u5E7F\u5DDE\u3001\u6210\u90FD\u7B49\u5730\u90FD\u6709\u529E\u516C\u5BA4\u3002\u53BB\u5E74 6 \u6708\uFF0C\u6296\u97F3\u7535\u5546\u843D\u6237\u676D\u5DDE\u3002</li><li>\u300C\u4E1A\u52A1\u65B9\u5411\u300D \uFF1A\u6296\u97F3\u7535\u5546\u3001\u6296\u97F3\u9910\u996E\u3001\u5B57\u8282\u8DF3\u52A8\u5E7F\u544A\u4E1A\u52A1\u3001\u5B57\u8282\u8DF3\u52A8\u672C\u5730\u751F\u6D3B</li><li>\u300C\u5DE5\u4F5C\u5730\u70B9\u300D \uFF1A\u4F59\u676D\u533A\u4E2D\u56FD\u676D\u5DDE 5G \u521B\u65B0\u56ED 5 \u5C42\u3001\u4F59\u676D\u533A\u676D\u5DDE\u5DE8\u91CF\u5F15\u64CE\u7F51\u7EDC\u6280\u672F\u6709\u9650\u516C\u53F8 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\uFF1A\u963F\u91CC\u7CFB\u5360\u636E\u4E86\u676D\u5DDE\u4E92\u8054\u7F51\u7684\u4E00\u7247\u5929\uFF0C\u76F8\u5173\u8054\u7684\u4F01\u4E1A\u662F\u5728\u662F\u592A\u591A\u4E86\u3002</li><li>\u300C\u4E1A\u52A1\u65B9\u5411\u300D \uFF1A\u8FBE\u6469\u9662\u3001\u6DD8\u5B9D\u3001\u83DC\u9E1F\u3001\u9489\u9489\u3001\u98DE\u732A\u3001\u76D2\u9A6C\u3001\u652F\u4ED8\u5B9D\u3001\u5938\u514B\u3001UC\u3001\u4E66\u65D7\u5C0F\u8BF4......</li><li>\u300C\u5DE5\u4F5C\u5730\u70B9\u300D \uFF1A\u897F\u6E56\u533A\u3001\u6EE8\u6C5F\u533A\u3001\u4F59\u676D\u533A......</li><li>\u300C\u798F\u5229\u60C5\u51B5\u300D\uFF1A7 \u9669\u4E00\u91D1\uFF08\u5168\u989D\u4F4F\u623F\u516C\u79EF\u91D1\uFF09\u3001\u8282\u65E5\u793C\u7269\u3001\u5E26\u85AA\u5047\u671F\u3001\u96C6\u4F53\u5A5A\u793C\u3002</li><li>\u300C\u62DB\u8058\u60C5\u51B5\u300D\uFF1A\u4E3B\u8981\u62DB\u8058 Java \u540E\u7AEF\u5F00\u53D1\u3001\u6570\u636E\u7814\u53D1\u3001\u6570\u636E\u5206\u6790\u3001\u7B97\u6CD5\u5DE5\u7A0B\u5E08\u7B49\u5C97\u4F4D\u3002</li><li>\u300C\u9762\u8BD5\u300D \uFF1A\u4E0D\u8BBA\u662F\u6821\u62DB\u8FD8\u662F\u793E\u62DB\uFF0C\u6280\u672F\u9762\u8BD5\u95EE\u7684\u90FD\u6BD4\u8F83\u6DF1\u5165\uFF0C\u901A\u5E38\u4F1A\u9488\u5BF9\u4E00\u4E2A\u6280\u672F\u95EE\u9898\u6DF1\u5165\u6316\u4E0B\u53BB\u3002</li><li>\u300C\u8865\u5145\u300D \uFF1A\u52A0\u73ED\u7684\u95EE\u9898\u6BD4\u8F83\u4E25\u91CD\uFF0C\u53D7\u4E0D\u4E86 996 \u7684\u5C0F\u4F19\u4F34\u614E\u91CD\u8003\u8651\u3002</li></ul><h3 id="\u4EAC\u4E1C" tabindex="-1"><a class="header-anchor" href="#\u4EAC\u4E1C" aria-hidden="true">#</a> \u4EAC\u4E1C</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/hangzhou-5.png" alt=""></p><ul><li>\u300C\u57FA\u672C\u60C5\u51B5\u300D \uFF1A\u4EAC\u4E1C\u5728\u676D\u5DDE\u4E5F\u6709\u62DB\u8058\uFF0C\u4E0D\u8FC7\uFF0C\u62DB\u8058\u7684\u5C97\u4F4D\u6BD4\u8F83\u5C11\u3002</li><li>\u300C\u4E1A\u52A1\u65B9\u5411\u300D \uFF1A\u4EAC\u4E1C\u91D1\u878D\u3001\u4EAC\u4E1C\u4E91</li><li>\u300C\u5DE5\u4F5C\u5730\u70B9\u300D \uFF1A\u676D\u5DDE\u62F1\u5885\u533A\u4E2D\u56FD\u667A\u6167\u4FE1\u606F\u4EA7\u4E1A\u56ED M \u5EA7 12 \u697C</li><li>\u300C\u798F\u5229\u60C5\u51B5\u300D\uFF1A\u4E94\u9669\u4E00\u91D1\u3001\u5E74\u5EA6\u4F53\u68C0\u3001\u4F4F\u623F\u8865\u52A9\u3001\u9910\u8865\u3001\u5E26\u85AA\u5047\u671F</li><li>\u300C\u62DB\u8058\u60C5\u51B5\u300D\uFF1A\u4E3B\u8981\u62DB\u8058 Java\u3001\u4EA7\u54C1\u7ECF\u7406\u7B49\u5C97\u4F4D</li><li>\u300C\u9762\u8BD5\u300D \uFF1A\u4EAC\u4E1C\u7684\u6280\u672F\u9762\u8BD5\u91C7\u7528\u5E38\u89C4\u9762\u8BD5\uFF0C\u5E76\u4E14\u95EE\u7684\u76F8\u5BF9\u7B80\u5355\u4E00\u4E9B\uFF0C\u800C\u4E14\u53EF\u4EE5\u90E8\u95E8\u76F4\u62DB\uFF0C\u4E0D\u9700\u8981\u7B14\u8BD5\u3002\u6280\u672F\u9762\u8BD5\u6709\u65F6\u5019\u662F\u4E24\u8F6E\uFF0C\u6709\u65F6\u5019\u662F\u4E09\u8F6E\u3002\u5728\u4EAC\u4E1C\u5982\u679C\u4E24\u8F6E\u9762\u8BD5\u4EE5\u540E\u4F60\u76F4\u63A5\u9047\u5230\u4E86 HR \u5BF9\u4F60\u9762\u8BD5\uFF0C\u4F60\u4E00\u822C\u5C31\u662F\u666E\u901A offer \u4E86\u3002\u7B2C\u4E09\u8F6E\u7684\u4E3B\u7BA1\u9762\u4F1A\u51B3\u5B9A\u662F\u5426\u7ED9\u4F60 sp\u3002\u4F46\u662F\uFF01\u636E\u6211\u6240\u77E5\uFF0C\u4EAC\u4E1C HR \u9762\u6302\u6389\u7684\u4EBA\u8FD8\u633A\u591A\u7684\uFF0C\u6240\u4EE5\u4EAC\u4E1C\u7684\u6280\u672F\u9762\u8D70\u5B8C\u4EE5\u540E\u8FD8\u4E0D\u592A\u7A33\u3002HR \u9762\u5B8C\u4F60\u4EE5\u540E\uFF0C\u5982\u679C\u9694\u4E00\u6BB5\u65F6\u95F4\u95EE\u4E86\u4F60\u8EAB\u4EFD\u8BC1\u53F7\uFF0C\u5E76\u6838\u5BF9\u4F60\u6BD5\u4E1A\u65F6\u95F4\u540E\uFF0C\u8FD9\u5C31\u5F88\u7A33\u4E86\u3002</li></ul><h3 id="\u7F51\u6613" tabindex="-1"><a class="header-anchor" href="#\u7F51\u6613" aria-hidden="true">#</a> \u7F51\u6613</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/hangzhou-6.png" alt=""></p><ul><li>\u300C\u57FA\u672C\u60C5\u51B5\u300D \uFF1A\u7F51\u6613\u5728\u676D\u5DDE\u6709\u4E00\u4E2A\u7814\u7A76\u9662\uFF0C\u6210\u7ACB\u4E8E 2006 \u5E74 6 \u6708\u3002</li><li>\u300C\u4E1A\u52A1\u65B9\u5411\u300D \uFF1A\u2F79\u6613\u676D\u5DDE\u7814\u7A76\u9662\uFF0C\u7B80\u79F0\u201C\u676D\u7814\u201D\u3002\u676D\u7814\u662F\u2F79\u6613\u5185\u90E8\u7684\u57FA\u7840\u6280\u672F\u7814\u53D1\u4E2D\u2F3C\u548C\u524D\u6CBF\u6280\u672F\u7814\u7A76\u4E2D\u2F3C\uFF0C\u5728\u4E91\u8BA1\u7B97\u3001\u2F24\u6570\u636E\u3001\u5B89\u5168\u3001\u2F08\u2F2F\u667A\u80FD\u7B49\u2F45\u2FAF\u8FDB\u2F8F\u524D\u6CBF\u6280\u672F\u7814\u7A76\u3001\u5173\u952E\u6280\u672F\u653B\u5173\u548C\u57FA\u7840\u6280\u672F\u5E73\u53F0\u7814\u53D1\uFF0C\u670D\u52A1\u2F79\u6613\u7CFB\u6E38\u620F\u3001\u90AE\u7BB1\u3001\u2FB3\u4E50\u3001\u7535\u5546\u3001\u65B0\u95FB\u3001\u5728\u7EBF\u6559\u80B2\u7B49\u4EA7\u54C1\uFF0C\u89E6\u8FBE\u8FD1 10 \u4EBF\u2F64\u6237\u3002</li><li>\u300C\u5DE5\u4F5C\u5730\u70B9\u300D \uFF1A\u676D\u5DDE\u6EE8\u6C5F\u533A\u7F51\u6613\u5927\u53A6\u4E8C\u671F\u7F51\u5546\u8DEF 399 \u53F7</li><li>\u300C\u798F\u5229\u60C5\u51B5\u300D\uFF1A\u8FD0\u52A8\u8BBE\u65BD\u3001\u751F\u65E5\u793C\u7269\u3001\u514D\u8D39\u73ED\u8F66\u3001\u4E94\u9669\u4E00\u91D1\u3001\u8865\u5145\u533B\u7597\u9669\u3001\u91CD\u75BE\u9669\u3001\u610F\u5916\u9669\u3001\u5B9A\u671F\u5BFF\u9669</li><li>\u300C\u62DB\u8058\u60C5\u51B5\u300D\uFF1A\u4E3B\u8981\u62DB\u8058 Java \u3001\u524D\u7AEF\u3001\u533A\u5757\u94FE\u7B49\u5C97\u4F4D\u3002</li><li>\u300C\u9762\u8BD5\u300D \uFF1A\u6280\u672F\u9762\u8BD5\u901A\u5E38\u7531 2 \u8F6E\uFF0C\u6700\u540E 1 \u8F6E\u4E00\u822C\u662F hr \u9762\u3002\u6CE8\u91CD\u9879\u76EE\u548C\u57FA\u672C\u529F , \u65E2\u8981\u6709\u5E7F\u5EA6\u8FD8\u8981\u6709\u6DF1\u5EA6\u3002</li></ul><h3 id="\u534E\u4E3A" tabindex="-1"><a class="header-anchor" href="#\u534E\u4E3A" aria-hidden="true">#</a> \u534E\u4E3A</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/hangzhou-7.png" alt=""></p><ul><li>\u300C\u57FA\u672C\u60C5\u51B5\u300D \uFF1A\u534E\u4E3A\u5728\u676D\u5DDE\u6709\u4E00\u4E2A\u7814\u7A76\u6240\u3002</li><li>\u300C\u4E1A\u52A1\u65B9\u5411\u300D \uFF1A\u667A\u80FD\u6444\u50CF\u673A\u3001\u4E91\u670D\u52A1</li><li>\u300C\u5DE5\u4F5C\u5730\u70B9\u300D \uFF1A\u676D\u5DDE\u6EE8\u6C5F\u533A\u534E\u4E3A\u6280\u672F\u6709\u9650\u516C\u53F8\u676D\u5DDE\u7814\u7A76\u6240</li><li>\u300C\u798F\u5229\u60C5\u51B5\u300D\uFF1A\u5458\u5DE5\u80A1\u6743\u6FC0\u52B1\u3001\u85AA\u8D44\u975E\u5E38\u6709\u7ADE\u4E89\u529B\u3002\u534E\u4E3A\u6821\u62DB\u6839\u636E\u9762\u8BD5\u8BC4\u5206\u7ED9\u5E94\u5C4A\u751F\u8FDB\u884C\u8BC4\u7EA7\uFF0C\u672C\u79D1\u751F\u548C\u7855\u58EB\u751F\u7684\u8BC4\u7EA7\u5728 13 \u7EA7 \u548C 15 \u7EA7 \u4E4B\u95F4\uFF0C\u6BCF\u4E00\u7EA7\u53C8\u5206\u4E3A A\u3001B\u3001C \u4E09\u4E2A\u6863\u3002\u6839\u636E\u8BC4\u7EA7\u8FDB\u884C\u5DE5\u8D44\u7684\u8BC4\u5B9A\uFF0C13 \u7EA7 \u548C 14 \u7EA7 \u7684\u7A0E\u524D\u5DE5\u8D44\u5728\u6BCF\u6708 13-19k \u4E4B\u95F4\uFF0C\u6BCF\u5E74 14 \u85AA\u300215 \u7EA7 \u9700\u8981\u7279\u522B\u4F18\u79C0\u7684\u7855\u58EB\u624D\u80FD\u62FF\u5230\uFF0C\u5DE5\u8D44\u5E74\u5305\u57FA\u672C\u5728\u7A0E\u524D 30 \u4E07 - 40 \u4E07\u4E4B\u95F4\u3002</li><li>\u300C\u62DB\u8058\u60C5\u51B5\u300D\uFF1A\u4E3B\u8981\u62DB\u8058\u8F6F\u4EF6\u5F00\u53D1\uFF08Java\u3001C++\uFF09\u3001\u5D4C\u5165\u5F0F\u5F00\u53D1\u3001\u6D4B\u8BD5\u7B49\u5C97\u4F4D\u3002\u53E6\u5916\uFF0C\u534E\u4E3A\u793E\u62DB\u4E00\u822C\u90FD\u662F OD \u6A21\u5F0F\u3002</li><li>\u300C\u9762\u8BD5\u300D \uFF1A\u9762\u8BD5\u7684\u8BDD\uFF0C\u96BE\u5EA6\u4E00\u822C\uFF0C\u4E3B\u8981\u770B\u5B66\u5386\u3002</li><li>\u300C\u8865\u5145\u300D : \u534E\u4E3A\u52A0\u73ED\u6BD4\u8F83\u591A\uFF0C\u538B\u529B\u53EF\u80FD\u4F1A\u6BD4\u8F83\u5927\u3002\u4E0D\u8FC7\uFF0C\u85AA\u8D44\u6536\u5165\u5728\u5168\u56FD\u7EDD\u5BF9\u662F Top \u7EA7\u522B\u3002</li></ul><h3 id="\u4E2D\u79FB\u676D\u7814" tabindex="-1"><a class="header-anchor" href="#\u4E2D\u79FB\u676D\u7814" aria-hidden="true">#</a> \u4E2D\u79FB\u676D\u7814</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/hangzhou-8.png" alt=""></p><ul><li>\u300C\u57FA\u672C\u60C5\u51B5\u300D \uFF1A\u4E2D\u56FD\u79FB\u52A8\u7684\u4E00\u4E2A\u5168\u8D44\u5B50\u516C\u53F8\uFF0C2014 \u5E74\u5728\u676D\u5DDE\u6210\u7ACB\u3002</li><li>\u300C\u4E1A\u52A1\u65B9\u5411\u300D \uFF1A\u7EDF\u4E00\u8BA4\u8BC1\u3001\u878D\u5408\u901A\u4FE1\u3001\u9B54\u56FA\u4E91</li><li>\u300C\u5DE5\u4F5C\u5730\u70B9\u300D \uFF1A\u676D\u5DDE\u4F59\u676D\u533A\u4E2D\u56FD\u79FB\u52A8(\u676D\u5DDE\u7814\u53D1\u4E2D\u5FC3)\u4F59\u676D\u5858\u8DEF 1600 \u53F7</li><li>\u300C\u798F\u5229\u60C5\u51B5\u300D\uFF1A\u4E94\u9669\u4E24\u91D1\uFF08\u4F01\u4E1A\u5E74\u91D1\uFF09\u3001\u8865\u5145\u533B\u7597\u4FDD\u9669\u3001\u610F\u5916\u4FDD\u9669\u3001\u5E26\u85AA\u5047\u671F</li><li>\u300C\u62DB\u8058\u60C5\u51B5\u300D\uFF1A\u4E3B\u8981\u62DB\u8058\u524D\u7AEF\u3001\u540E\u7AEF\u3001\u5B89\u5353\u3001\u7B97\u6CD5\u7B49\u5C97\u4F4D\u3002</li><li>\u300C\u9762\u8BD5\u300D \uFF1A\u9762\u8BD5\u7684\u8BDD\uFF0C\u96BE\u5EA6\u4E00\u822C\uFF0C\u4E3B\u8981\u770B\u5B66\u5386\u3002</li></ul><h3 id="\u4E4B\u6C5F\u5B9E\u9A8C\u5BA4" tabindex="-1"><a class="header-anchor" href="#\u4E4B\u6C5F\u5B9E\u9A8C\u5BA4" aria-hidden="true">#</a> \u4E4B\u6C5F\u5B9E\u9A8C\u5BA4</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/hangzhou-9.png" alt=""></p><ul><li>\u300C\u57FA\u672C\u60C5\u51B5\u300D \uFF1A\u4E4B\u6C5F\u5B9E\u9A8C\u5BA4\u662F\u6D59\u6C5F\u7701\u59D4\u3001\u7701\u653F\u5E9C\u8D2F\u5F7B\u843D\u5B9E\u79D1\u6280\u521B\u65B0\u601D\u60F3\uFF0C\u6DF1\u5165\u5B9E\u65BD\u521B\u65B0\u9A71\u52A8\u53D1\u5C55\u6218\u7565\u7684\u91CD\u5927\u79D1\u6280\u521B\u65B0\u5E73\u53F0\u3002</li><li>\u300C\u4E1A\u52A1\u65B9\u5411\u300D \uFF1A\u667A\u80FD\u611F\u77E5\u3001\u667A\u80FD\u8BA1\u7B97\u3001\u667A\u80FD\u7F51\u7EDC\u3001\u667A\u80FD\u7CFB\u7EDF</li><li>\u300C\u5DE5\u4F5C\u5730\u70B9\u300D \uFF1A\u676D\u5DDE\u5E02\u4F59\u676D\u533A\u6587\u4E00\u897F\u8DEF 1818 \u53F7\u4E2D\u56FD\u4EBA\u5DE5\u667A\u80FD\u5C0F\u9547 10 \u53F7\u697C</li><li>\u300C\u798F\u5229\u60C5\u51B5\u300D\uFF1A\u4E94\u9669\u4E00\u91D1\u3001Top \u85AA\u8D44\u3001\u4F4F\u623F\u4FDD\u969C\u3001\u4F18\u60E0\u7A0E\u6536\u3001\u5E26\u85AA\u5047\u671F\u3001\u9910\u8865</li><li>\u300C\u62DB\u8058\u60C5\u51B5\u300D\uFF1A\u4E3B\u8981\u62DB\u8058\u8F6F\u4EF6\u5F00\u53D1\u3001\u82AF\u7247\u8BBE\u8BA1\u3001DevOps \u3001\u6D4B\u8BD5\u7B49\u5C97\u4F4D</li><li>\u300C\u9762\u8BD5\u300D \uFF1A\u5BF9\u5B66\u5386\u8981\u6C42\u7279\u522B\u9AD8\uFF01</li></ul><h3 id="\u540C\u82B1\u987A" tabindex="-1"><a class="header-anchor" href="#\u540C\u82B1\u987A" aria-hidden="true">#</a> \u540C\u82B1\u987A</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/hangzhou-10.png" alt=""></p><ul><li>\u300C\u57FA\u672C\u60C5\u51B5\u300D \uFF1A\u540C\u82B1\u987A\u6210\u7ACB\u4E8E 2001 \u5E74,\u603B\u90E8\u4F4D\u4E8E\u676D\u5DDE\u672A\u6765\u79D1\u6280\u57CE\uFF0C\u662F\u56FD\u5185\u7B2C\u4E00\u5BB6\u4E92\u8054\u7F51\u91D1\u878D\u4FE1\u606F\u670D\u52A1\u4E1A\u4E0A\u5E02\u516C\u53F8\u3002\u540C\u82B1\u987A\u4F5C\u4E3A\u4E00\u5BB6\u4E92\u8054\u7F51\u91D1\u878D\u4FE1\u606F\u63D0\u4F9B\u5546\uFF0C\u81F4\u529B\u4E8E\u4E3A\u5404\u7C7B\u673A\u6784\u63D0\u4F9B\u8F6F\u4EF6\u4EA7\u54C1\u548C\u7CFB\u7EDF\u7EF4\u62A4\u670D\u52A1\u3001\u91D1\u878D\u6570\u636E\u670D\u52A1\u548C\u667A\u80FD\u63A8\u5E7F\u670D\u52A1\uFF0C\u4E3A\u4E2A\u4EBA\u6295\u8D44\u8005\u63D0\u4F9B\u91D1\u878D\u8D44\u8BAF\u548C\u6295\u8D44\u7406\u8D22\u5206\u6790\u5DE5\u5177\u3002</li><li>\u300C\u4E1A\u52A1\u65B9\u5411\u300D \uFF1A\u65D7\u4E0B\u6709\u591A\u6B3E\u70ED\u95E8\u6295\u8D44\u7406\u8D22\u7C7B APP\u3002</li><li>\u300C\u5DE5\u4F5C\u5730\u70B9\u300D \uFF1A\u676D\u5DDE\u4F59\u676D\u533A\u540C\u82B1\u987A\u65B0\u5927\u697C\u603B\u90E8\u540C\u987A\u8857 18 \u53F7</li><li>\u300C\u798F\u5229\u60C5\u51B5\u300D\uFF1A\u85AA\u8D44\u4E2D\u7B49\u504F\u4E0A\uFF0C\u5176\u4ED6\u798F\u5229\u60C5\u51B5\u672A\u77E5</li><li>\u300C\u62DB\u8058\u60C5\u51B5\u300D\uFF1A\u4E3B\u8981\u62DB\u8058 Java\u3001C++\u3001\u524D\u7AEF\u3001\u673A\u5668\u5B66\u4E60\u3001\u4EA7\u54C1\u7ECF\u7406\u7B49\u5C97\u4F4D</li><li>\u300C\u9762\u8BD5\u300D \uFF1A\u6280\u672F\u9762\u8BD5\u96BE\u5EA6\u4E00\u822C\uFF0C\u800C\u4E14\u901A\u5E38\u5C31\u53EA\u6709\u4E00\u8F6E\u6280\u672F\u9762\u8BD5\u3002\u8FD9\u662F\u4E00\u4F4D\u53BB\u9762\u8BD5\u540C\u82B1\u987A\u540E\u7AEF\u5F00\u53D1\u7684\u670B\u53CB\u7ED9\u6211\u53CD\u9988\u7684\u9762\u7ECF\uFF1A\u201C\u9762\u8BD5\u5B98\u975E\u5E38\u548C\u5584\u3002\u4E0A\u6765\u5C31\u8BA9\u4F60\u505A\u4E2A\u81EA\u6211\u4ECB\u7ECD\uFF0C\u56DE\u7B54\u54EA\u91CC\u6BD5\u4E1A\uFF0C\u6BD5\u4E1A\u4E4B\u540E\u5728\u54EA\u5DE5\u4F5C\uFF0C\u719F\u6089\u7684\u6280\u672F\u6808\u3002\u7136\u540E\u95EE\u4E86\u4E3A\u4EC0\u4E48\u79BB\u804C\u4E4B\u7C7B\u7684\u3002\u4E4B\u540E\u5F00\u59CB\u95EE\u4E4B\u524D\u505A\u7684\u9879\u76EE\uFF0C\u91CD\u70B9\u95EE\u4F60\u505A\u4E86\u54EA\u4E9B\u6709\u4EAE\u70B9\u7684\u9879\u76EE\uFF0C\u968F\u4FBF\u7B54\u4E86\u4E2A\u9AD8\u5E76\u53D1\u4E0B\u4FDD\u8BC1\u539F\u5B50\u6027\u7684\u9879\u76EE\uFF0C\u7136\u540E\u548C\u9762\u8BD5\u5B98\u4E00\u8D77\u8BA8\u8BBA\u4F1A\u4E0D\u4F1A\u6709\u66F4\u597D\u7684\u89E3\u51B3\u529E\u6CD5\u3002\u201D</li></ul><h3 id="_51-\u4FE1\u7528\u5361" tabindex="-1"><a class="header-anchor" href="#_51-\u4FE1\u7528\u5361" aria-hidden="true">#</a> 51 \u4FE1\u7528\u5361</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/hangzhou-11.png" alt=""></p><ul><li>\u300C\u57FA\u672C\u60C5\u51B5\u300D \uFF1A51 \u4FE1\u7528\u5361\uFF08\u6BCD\u516C\u53F8\u4E3A\u676D\u5DDE\u6069\u725B\u7F51\u7EDC\u6280\u672F\u6709\u9650\u516C\u53F8\uFF09\uFF0C\u516C\u53F8\u521B\u7ACB\u4E8E 2012 \u5E74\uFF0C\u662F\u4E00\u5BB6\u670D\u52A1\u4E8E\u4E2D\u56FD\u4EBF\u4E07\u4FE1\u7528\u5361\u7528\u6237\u7684\u4E92\u8054\u7F51\u91D1\u878D\u516C\u53F8\u3002</li><li>\u300C\u4E1A\u52A1\u65B9\u5411\u300D \uFF1A\u65D7\u4E0B\u6709\u201C51 \u4FE1\u7528\u5361\u7BA1\u5BB6\u201D\u3001\u201C51 \u4EBA\u54C1\u201D\u3001\u201C51 \u4EBA\u54C1\u8D37\u201D\u7B49 APP</li><li>\u300C\u5DE5\u4F5C\u5730\u70B9\u300D \uFF1A\u676D\u5DDE\u897F\u6E56\u533A\u4E2D\u8282\u80FD\xB7\u897F\u6EAA\u9996\u5EA7 B3\u3001\u676D\u5DDE\u897F\u6E56\u533A\u897F\u6EAA\u8C37 G \u5EA7</li><li>\u300C\u798F\u5229\u60C5\u51B5\u300D\uFF1A\u516D\u9669\u4E00\u91D1\u3001\u751F\u65E5\u793C\u7269\u3001\u8282\u65E5\u8D3A\u793C\u3001\u751F\u80B2\u5173\u6000\u3001\u7CBE\u5F69\u56E2\u5EFA\u3001\u5E74\u5EA6\u4F53\u68C0\u3001\u5E74\u5EA6\u65C5\u6E38</li><li>\u300C\u62DB\u8058\u60C5\u51B5\u300D\uFF1A\u4E3B\u8981\u62DB\u8058 Java\u3001\u524D\u7AEF\u3001\u5B89\u5168\u3001\u6570\u636E\u4ED3\u5E93\u7B49\u5C97\u4F4D</li><li>\u300C\u9762\u8BD5\u300D \uFF1A\u9762\u8BD5\u96BE\u5EA6\u4E00\u822C\u3002\u6280\u672F\u9762\u8BD5\u4E00\u822C\u4F1A\u6709 2 \u9762\uFF0C\u6700\u540E\u4E00\u9762\u662F HR \u9762\u3002 \u672C\u571F\u4E92\u8054\u7F51\u516C\u53F8</li></ul><h3 id="\u8611\u83C7\u8857" tabindex="-1"><a class="header-anchor" href="#\u8611\u83C7\u8857" aria-hidden="true">#</a> \u8611\u83C7\u8857</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/hangzhou-12.png" alt=""></p><ul><li>\u300C\u57FA\u672C\u60C5\u51B5\u300D \uFF1A2011 \u5E74\uFF0C\u8611\u83C7\u8857\u6B63\u5F0F\u4E0A\u7EBF\uFF0C2016 \u5E74 1 \u6708\u4E0E\u7F8E\u4E3D\u8BF4\u6218\u7565\u878D\u5408\uFF0C\u516C\u53F8\u65D7\u4E0B\u5305\u62EC\uFF1A\u8611\u83C7\u8857\u3001\u7F8E\u4E3D\u8BF4\u3001uni \u7B49\u4EA7\u54C1\u4E0E\u670D\u52A1\u3002</li><li>\u300C\u4E1A\u52A1\u65B9\u5411\u300D \uFF1A\u7535\u5546</li><li>\u300C\u5DE5\u4F5C\u5730\u70B9\u300D \uFF1A\u676D\u5DDE\u897F\u6E56\u533A\u9EC4\u9F99\u4E07\u79D1\u4E2D\u5FC3 G \u5EA7</li><li>\u300C\u798F\u5229\u60C5\u51B5\u300D\uFF1A\u65E0\u9650\u7684\u96F6\u98DF\u996E\u6599\u4F9B\u5E94\u3001\u5065\u8EAB\u623F\u3001\u5496\u5561\u5385\u3001</li><li>\u300C\u62DB\u8058\u60C5\u51B5\u300D\uFF1A\u4E3B\u8981\u62DB\u8058 Java \u540E\u7AEF\u3001\u524D\u7AEF\u3001\u79FB\u52A8\u5F00\u53D1\u7B49\u5C97\u4F4D\u3002</li><li>\u300C\u9762\u8BD5\u300D \uFF1A\u9762\u8BD5\u96BE\u5EA6\u4E2D\u7B49\u3002\u6280\u672F\u9762\u8BD5\u4E00\u822C\u4F1A\u6709 2 \u9762\uFF0C\u6700\u540E\u4E00\u9762\u662F HR \u9762\u3002</li><li>\u300C\u8865\u5145\u300D : \u636E\u8BF4\u516C\u53F8\u7684\u5DE5\u4F5C\u4F53\u9A8C\u8FD8\u4E0D\u9519\uFF01</li></ul><h3 id="\u6709\u8D5E" tabindex="-1"><a class="header-anchor" href="#\u6709\u8D5E" aria-hidden="true">#</a> \u6709\u8D5E</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/hangzhou-13.png" alt=""></p><ul><li>\u300C\u57FA\u672C\u60C5\u51B5\u300D \uFF1A\u6709\u8D5E\uFF0C\u539F\u540D\u53E3\u888B\u901A\uFF0C2012 \u5E74 11 \u6708 27 \u65E5\u5728\u676D\u5DDE\u8D1D\u5854\u5496\u5561\u9986\u5B75\u5316\u6210\u7ACB\uFF0C\u662F\u4E00\u5BB6\u4E3B\u8981\u4ECE\u4E8B\u96F6\u552E\u79D1\u6280 SaaS \u670D\u52A1\u7684\u4F01\u4E1A\uFF0C\u5E2E\u52A9\u5546\u5BB6\u8FDB\u884C\u7F51\u4E0A\u5F00\u5E97\u3001\u793E\u4EA4\u8425\u9500\u3001\u63D0\u9AD8\u7559\u5B58\u590D\u8D2D\uFF0C\u62D3\u5C55\u5168\u6E20\u9053\u65B0\u96F6\u552E\u4E1A\u52A1\u30022014 \u5E74 11 \u6708 27 \u65E5\uFF0C\u53E3\u888B\u901A\u6B63\u5F0F\u66F4\u540D\u4E3A\u6709\u8D5E\u30022018 \u5E74 4 \u6708 18 \u65E5\uFF0C\u6709\u8D5E\u5B8C\u6210\u5728\u6E2F\u4E0A\u5E02\u30022019 \u5E74 4 \u6708\uFF0C\u817E\u8BAF\u9886\u6295\u6709\u8D5E 10 \u4EBF\u6E2F\u5143\u878D\u8D44\u3002</li><li>\u300C\u4E1A\u52A1\u65B9\u5411\u300D \uFF1ASaaS \u670D\u52A1\uFF08\u5E2E\u52A9\u5546\u5BB6\u7F51\u4E0A\u5F00\u5E97\u3001\u793E\u4EA4\u8425\u9500......\uFF09\u3001PaaS \u4E91\u670D\u52A1\u3002</li><li>\u300C\u5DE5\u4F5C\u5730\u70B9\u300D \uFF1A\u676D\u5DDE\u897F\u6E56\u533A\u676D\u5DDE\u6709\u8D5E\u79D1\u6280\u6709\u9650\u516C\u53F8\u897F\u6EAA\u8DEF 698 \u53F7\u3001\u676D\u5DDE\u897F\u6E56\u533A\u9EC4\u9F99\u4E07\u79D1\u4E2D\u5FC3 G \u5EA7</li><li>\u300C\u798F\u5229\u60C5\u51B5\u300D\uFF1A\u5168\u989D\u4E94\u9669\u4E00\u91D1\uFF0C\u516C\u79EF\u91D1 12%+\u996D\u8865+\u8BDD\u8D39\u8865\u52A9</li><li>\u300C\u62DB\u8058\u60C5\u51B5\u300D\uFF1A\u4E3B\u8981\u62DB\u8058\u540E\u7AEF\u3001\u524D\u7AEF\u3001\u79FB\u52A8\u5F00\u53D1\u7B49\u5C97\u4F4D\u3002</li><li>\u300C\u9762\u8BD5\u300D \uFF1A\u9762\u8BD5\u96BE\u5EA6\u4E2D\u7B49\u504F\u4E0A\u3002\u4E00\u822C\u6709 3 \u8F6E\u9762\u8BD5\uFF0C\u524D 2 \u9762\u662F\u6280\u672F\u9762\uFF0C\u6700\u540E 1 \u9762\u662F HR \u9762\u3002\u8FD9\u662F\u6211\u7684\u4E00\u4F4D\u53BB\u9762\u8BD5\u6709\u8D5E Java \u540E\u7AEF\u5F00\u53D1\u7684\u670B\u53CB\u7ED9\u6211\u53CD\u9988\u7684\u9762\u7ECF\uFF1A\u201C\u9762\u8BD5\u5B98\u5F88\u770B\u91CD\u4E13\u4E1A\u6280\u80FD\uFF0C1 \u9762\u95EE\u57FA\u7840\uFF0C\u5F88\u7EC6\u5F88\u5E7F\uFF0C\u80FD\u95EE\u7684\u57FA\u672C\u90FD\u95EE\u4E86\u4E2A\u904D\u3002Java \u57FA\u7840\u3001\u591A\u7EBF\u7A0B\u3001JVM\u3001RPC\u3001\u9650\u6D41\u7B97\u6CD5\u3001\u964D\u7EA7\u7B97\u6CD5\u3001\u5206\u5E03\u5F0F\u4E8B\u52A1\u4E2D\u95F4\u4EF6\u3001Redis\u3001\u5206\u5E03\u5F0F\u9501......2 \u9762\u8DDF 1 \u9762\u76F8\u6BD4\u5DEE\u4E0D\u592A\u591A\uFF0C\u6709\u4E9B\u504F\u91CD\u89E3\u51B3\u95EE\u9898\u601D\u8DEF\u30023 \u9762\u4EA4\u6D41\u4E86\u4E0B\u4E2A\u4EBA\u60C5\u51B5\u4E5F\u63D0\u4E86\u5F88\u591A\u5EFA\u8BAE\u3002\u201D</li><li>\u300C\u8865\u5145\u300D : \u516C\u53F8\u6280\u672F\u4E0D\u9519\uFF01\u4E3B\u8981\u62DB\u8058 Java \u5F00\u53D1\uFF0C\u505A Java \u7684\u53EF\u4EE5\u4F18\u5148\u8003\u8651\u8FD9\u5BB6\u3002</li></ul><h3 id="zoom" tabindex="-1"><a class="header-anchor" href="#zoom" aria-hidden="true">#</a> Zoom</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/hangzhou-14.png" alt=""></p><ul><li>\u300C\u57FA\u672C\u60C5\u51B5\u300D \uFF1AZoom \u662F\u4E00\u4F4D\u7F8E\u56FD\u534E\u4EBA\u4F01\u4E1A\u5BB6\u521B\u529E\u7684\u516C\u53F8\uFF0C\u4E3B\u8425\u4E1A\u52A1\u5C31\u662F\u63D0\u4F9B\u89C6\u9891\u4F1A\u8BAE\u670D\u52A1\u3002\u603B\u90E8\u4F4D\u4E8E\u7845\u8C37\uFF0C\u56FD\u5185\u7684\u8BDD\uFF0C\u676D\u5DDE\u3001\u82CF\u5DDE\u3001\u5408\u80A5\u5747\u6709\u7814\u53D1\u4E2D\u5FC3\u3002</li><li>\u300C\u4E1A\u52A1\u65B9\u5411\u300D \uFF1A\u89C6\u9891\u4F1A\u8BAE</li><li>\u300C\u5DE5\u4F5C\u5730\u70B9\u300D \uFF1A\u676D\u5DDE\u6EE8\u6C5F\u533A\u6D77\u5EB7\u5A01\u89C6\u4E1C\u6D41\u8DEF 700 \u53F7</li><li>\u300C\u798F\u5229\u60C5\u51B5\u300D\uFF1A\u5168\u989D\u4E94\u9669\u4E00\u91D1\u3001\u5546\u4E1A\u4FDD\u9669\u3001\u9910\u8865\u3001\u5E74\u5EA6\u65C5\u6E38</li><li>\u300C\u62DB\u8058\u60C5\u51B5\u300D\uFF1A\u4E3B\u8981\u62DB\u8058\u7B97\u6CD5\u3001\u6D4B\u8BD5\u3001Web \u524D\u7AEF\u3001\u5168\u6808\u3001C/C++\uFF08\u540E\u7AEF\u5F00\u53D1\u8FD9\u5757 C++\u62DB\u8058\u504F\u591A\u4E00\u4E9B\uFF09\u3001Java\u3001Go\u3002</li><li>\u300C\u9762\u8BD5\u300D \uFF1A\u96BE\u5EA6\u4E00\u822C\uFF0C\u5916\u4F01\u4E00\u822C\u6BD4\u8F83\u91CD\u89C6\u8BA1\u7B97\u673A\u57FA\u7840\u77E5\u8BC6\u3002</li><li>\u300C\u8865\u5145\u300D : Zoom \u7684\u5DE5\u4F5C\u73AF\u5883\u3001\u4F01\u4E1A\u6587\u5316\u4EC0\u4E48\u7684\u597D\u8BC4\u5EA6\u5728\u56FD\u5185\u5916\u90FD\u633A\u9AD8\u7684\u3002\u4E0D\u8FC7\uFF0C\u636E\u8BF4\u4E5F\u5B58\u5728\u90E8\u5206\u9879\u76EE\u7EC4\u52A0\u73ED\u7684\u60C5\u51B5\u3002965 \u4E0D\u52A0\u73ED\uFF0Cwork life balance\u3002\u6280\u672F\u6C1B\u56F4\u597D\uFF0C\u76F8\u5904\u7B80\u5355\u3002</li></ul><h3 id="cisco-\u601D\u79D1" tabindex="-1"><a class="header-anchor" href="#cisco-\u601D\u79D1" aria-hidden="true">#</a> Cisco(\u601D\u79D1)</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/hangzhou-15.png" alt=""></p><ul><li>\u300C\u57FA\u672C\u60C5\u51B5\u300D \uFF1A\u601D\u79D1\u7CFB\u7EDF\u516C\u53F8\uFF08Cisco Systems, Inc.\uFF09\uFF0C\u7B80\u79F0\u601D\u79D1\u516C\u53F8\u6216\u601D\u79D1\uFF0C1984 \u5E74 12 \u6708\u6B63\u5F0F\u6210\u7ACB\uFF0C\u662F\u4E92\u8054\u7F51\u89E3\u51B3\u65B9\u6848\u7684\u9886\u5148\u63D0\u4F9B\u8005\uFF0C\u5176\u8BBE\u5907\u548C\u8F6F\u4EF6\u4EA7\u54C1\u4E3B\u8981\u7528\u4E8E\u8FDE\u63A5\u8BA1\u7B97\u673A\u7F51\u7EDC\u7CFB\u7EDF\uFF0C\u603B\u90E8\u4F4D\u4E8E\u7F8E\u56FD\u52A0\u5229\u798F\u5C3C\u4E9A\u5DDE\u5723\u4F55\u585E\u3002</li><li>\u300C\u4E1A\u52A1\u65B9\u5411\u300D \uFF1A\u8DEF\u7531\u5668\u3001\u4EA4\u6362\u673A\u7B49\u7F51\u7EDC\u57FA\u7840\u8BBE\u65BD</li><li>\u300C\u5DE5\u4F5C\u5730\u70B9\u300D \uFF1A\u676D\u5DDE\u4E0A\u57CE\u533A\u4E2D\u8C6A\xB7\u671B\u6C5F\u56FD\u9645 4 \u5E62 20 \u5C42</li><li>\u300C\u798F\u5229\u60C5\u51B5\u300D\uFF1A\u5168\u989D\u4E94\u9669\u4E00\u91D1\u3001\u5546\u4E1A\u4FDD\u9669\u3001\u9910\u8865\u3001\u5E74\u5EA6\u65C5\u6E38</li><li>\u300C\u62DB\u8058\u60C5\u51B5\u300D\uFF1A\u4E3B\u8981\u62DB\u8058 Java\u3001\u524D\u7AEF\u7B49\u5C97\u4F4D</li><li>\u300C\u9762\u8BD5\u300D \uFF1A\u96BE\u5EA6\u4E2D\u7B49\u504F\u4E0A\uFF0C\u5916\u4F01\u4E00\u822C\u6BD4\u8F83\u91CD\u89C6\u8BA1\u7B97\u673A\u57FA\u7840\u77E5\u8BC6\u3002</li></ul><hr><p>\u5BF9\u4E8E\u676D\u5DDE\uFF0C\u6211\u5370\u8C61\u6700\u6DF1\u523B\u7684\u5C31\u662F\u5728\u82CF\u5DDE\u4E0A\u73ED\u65F6\u548C\u540C\u4E8B\u53BB\u4E4C\u9547-\u676D\u5DDE\u7684\u4E09\u65E5\u6E38\u4E86\uFF0C\u5F53\u65F6\u963F\u91CC\u8FD8\u6CA1\u6709\u5174\u8D77\uFF0C\u4E92\u8054\u7F51\u73AF\u5883\u4E5F\u6CA1\u6709\u73B0\u5728\u8FD9\u822C\u80FD\u5377\u3002</p><p>\u987A\u5E26\u518D\u804A\u804A\u676D\u5DDE\u7684\u623F\u4EF7\u3001\u6559\u80B2\u5427\u3002\u676D\u5DDE\u7684\u623F\u4EF7\u4E0D\u5FCD\u76F4\u89C6\u554A\uFF01\uFF01\uFF01\u6DA8\u7684\u5B9E\u5728\u662F\u592A\u5389\u5BB3\u4E86\uFF01</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/hangzhou-16.png" alt=""></p><p>\u676D\u5DDE\u53EA\u6709\u4E00\u6240 985\uFF0C\u4E5F\u5C31\u662F\u6D59\u6C5F\u5927\u5B66\u3002\u9664\u4E86\u6D59\u6C5F\u5927\u5B66\u4E4B\u5916\uFF0C\u6D59\u6C5F\u7701\u6CA1\u6709 211 \u9662\u6821\u3002\u4E0D\u8FC7\uFF0C\u676D\u5DDE\u7535\u5B50\u79D1\u6280\u5927\u5B66\u867D\u7136\u4E0D\u662F 211\uFF0C\u4F46\u662F\u5B9E\u529B\u5F88\u5F3A\uFF0C\u5916\u754C\u4E5F\u5F88\u8BA4\u53EF\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/hangzhou-17.png" alt=""></p>',66),p=l("\u4F5C\u8005\uFF1A\u5927\u767D\uFF0C\u8F6C\u8F7D\u94FE\u63A5\uFF1A"),d={href:"https://mp.weixin.qq.com/s/hrL2tqXHT5AjOqrQlRhR-w",target:"_blank",rel:"noopener noreferrer"},b=l("https://mp.weixin.qq.com/s/hrL2tqXHT5AjOqrQlRhR-w"),g=i("p",null,[i("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png",alt:""})],-1);function u(m,v){const e=t("ExternalLinkIcon");return r(),o("div",null,[s,i("blockquote",null,[i("p",null,[p,i("a",d,[b,h(e)])])]),g])}var _=a(n,[["render",u],["__file","hangzhou.html.vue"]]);export{_ as default};
diff --git a/dist/assets/hangzhou.html.b80d450d.js b/dist/assets/hangzhou.html.b80d450d.js
deleted file mode 100644
index d158906c..00000000
--- a/dist/assets/hangzhou.html.b80d450d.js
+++ /dev/null
@@ -1 +0,0 @@
-import{_ as a}from"./plugin-vue_export-helper.21dcd24c.js";import{r as t,o as r,c as o,a as i,b as h,e as c,d as l}from"./app.a0271b9c.js";const n={},s=c('<h1 id="\u676D\u5DDE\u6709\u54EA\u4E9B\u9876\u7EA7\u7684\u4E92\u8054\u7F51\u516C\u53F8" tabindex="-1"><a class="header-anchor" href="#\u676D\u5DDE\u6709\u54EA\u4E9B\u9876\u7EA7\u7684\u4E92\u8054\u7F51\u516C\u53F8" aria-hidden="true">#</a> \u676D\u5DDE\u6709\u54EA\u4E9B\u9876\u7EA7\u7684\u4E92\u8054\u7F51\u516C\u53F8\uFF1F</h1><p>\u5927\u5BB6\u597D\uFF0C\u6211\u662F\u4E8C\u54E5\u5440\uFF01\u4E0A\u671F\u53D1\u4E86\u5357\u4EAC\u7684\u4E92\u8054\u7F51\u516C\u53F8\u540E\uFF0C\u676D\u5DDE\u7684\u547C\u58F0\u975E\u5E38\u9AD8\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/hangzhou-1.png" alt=""></p><p>\u6709\u5C0F\u4F19\u4F34\u5728\u516C\u4F17\u53F7\u540E\u53F0\u79C1\u4FE1\u50AC\uFF0C\u8FD8\u6709\u5C0F\u4F19\u4F34\u5728\u4E8C\u54E5\u7684\u300AJava \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF\u300B\u7684\u5F00\u6E90\u4E13\u680F\u63D0\u4EA4\u4E86 issue\uFF0C\u90A3\u4ECA\u5929\u5FC5\u987B\u5F97\u6765\u6574\u4E00\u6CE2\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/hangzhou-2.png" alt=""></p><p>\u676D\u5DDE\u7684\u4E92\u8054\u7F51\u516C\u53F8\u6BD4\u8F83\u591A\uFF0C\u6211\u5148\u5217\u4E3E\u4E00\u4E9B\u5927\u5BB6\u7785\u7785\uFF08\u90E8\u5206\u6570\u636E\u6765\u6E90\u4E8E\u597D\u670B\u53CB Carl \u7684\u7EDF\u8BA1\uFF09\u3002</p><p><strong>\u4E00\u7EBF\u7684\u4E92\u8054\u7F51\u516C\u53F8</strong>\u6709\uFF1A</p><ul><li>\u963F\u91CC\u5DF4\u5DF4\uFF08\u603B\u90E8\uFF09</li><li>\u8682\u8681\u91D1\u670D\uFF08\u603B\u90E8\uFF09\u963F\u91CC\u65D7\u4E0B</li><li>\u963F\u91CC\u4E91\uFF08\u603B\u90E8\uFF09\u963F\u91CC\u65D7\u4E0B</li><li>\u7F51\u6613\uFF08\u676D\u5DDE\uFF09 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\uFF08\u676D\u5DDE\u7814\u53D1\u4E2D\u5FC3\uFF09\u5168\u7403\u77E5\u540D\u4E91\u89C6\u9891\u4F1A\u8BAE\u670D\u52A1\u63D0\u4F9B\u5546</li><li>infosys\uFF08\u676D\u5DDE\uFF09\u5370\u5EA6\u516C\u53F8\uFF0C\u636E\u8BF4\u5DE5\u8D44\u76F8\u5BF9\u4E0D\u9AD8</li><li>\u601D\u79D1\uFF08\u676D\u5DDE\uFF09</li></ul><p><strong>\u4E8C\u4E09\u7EBF\u4E92\u8054\u7F51</strong>\u516C\u53F8\uFF1A</p><ul><li>\u6EF4\u6EF4\uFF08\u676D\u5DDE\uFF09</li><li>\u5FEB\u624B\uFF08\u676D\u5DDE\uFF09</li><li>\u8611\u83C7\u8857\uFF08\u603B\u90E8\uFF09\u5973\u6027\u6D88\u8D39\u8005\u7684\u7535\u5B50\u5546\u52A1\u7F51\u7AD9</li><li>\u6709\u8D5E\uFF08\u603B\u90E8\uFF09\u5E2E\u52A9\u5546\u5BB6\u8FDB\u884C\u7F51\u4E0A\u5F00\u5E97\u3001\u793E\u4EA4\u8425\u9500</li><li>\u83DC\u9E1F\u7F51\u7EDC\uFF08\u676D\u5DDE\uFF09</li><li>\u82B1\u74E3\u7F51\uFF08\u603B\u90E8\uFF09\u56FE\u7247\u7D20\u6750\u9886\u5BFC\u8005</li><li>\u5151\u5427\uFF08\u603B\u90E8\uFF09\u7528\u6237\u8FD0\u8425\u670D\u52A1\u5E73\u53F0</li><li>\u540C\u82B1\u987A\uFF08\u603B\u90E8\uFF09\u7F51\u4E0A\u80A1\u7968\u8BC1\u5238\u4EA4\u6613\u5206\u6790\u8F6F\u4EF6</li><li>51 \u4FE1\u7528\u5361\uFF08\u603B\u90E8\uFF09\u4FE1\u7528\u5361\u7BA1\u7406</li><li>\u867E\u7C73\uFF08\u603B\u90E8\uFF09\u5DF2\u88AB\u963F\u91CC\u6536\u8D2D</li><li>\u66F9\u64CD\u51FA\u884C\uFF08\u603B\u90E8\uFF09</li><li>\u53E3\u7891\u7F51 \uFF08\u603B\u90E8\uFF09</li></ul><p><strong>\u786C\u4EF6\u5DE8\u5934</strong>\uFF1A</p><ul><li>\u6D77\u5EB7\u5A01\u89C6\uFF08\u603B\u90E8\uFF09\u5B89\u9632\u4E09\u5DE8\u5934</li><li>\u6D59\u6C5F\u5927\u534E\uFF08\u603B\u90E8\uFF09\u5B89\u9632\u4E09\u5DE8\u5934</li><li>\u676D\u5DDE\u5B87\u89C6\uFF08\u603B\u90E8\uFF09 \u5B89\u9632\u4E09\u5DE8\u5934</li><li>\u534E\u4E3A\uFF08\u676D\u5DDE\uFF09</li><li>vivo\uFF08\u676D\u5DDE\uFF09</li><li>oppo\uFF08\u676D\u5DDE\uFF09</li><li>\u9B45\u65CF\uFF08\u676D\u5DDE\uFF09</li></ul><p><strong>AI \u72EC\u89D2\u517D\u516C\u53F8</strong>\uFF1A</p><ul><li>\u65F7\u89C6\u79D1\u6280\uFF08\u676D\u5DDE\uFF09\u4EBA\u5DE5\u667A\u80FD\u4EA7\u54C1\u548C\u89E3\u51B3\u65B9\u6848\uFF0CFace++\u4E91\u5E73\u53F0\u5C31\u662F\u4ED6\u4EEC\u5BB6\u7684\u4EA7\u54C1\u3002</li><li>\u5546\u6C64\uFF08\u676D\u5DDE\uFF09 Ai \u9886\u57DF\u72EC\u89D2\u517D\uFF0C\u4E1A\u52A1\u6DB5\u76D6\u667A\u6167\u5546\u4E1A\u3001\u667A\u6167\u57CE\u5E02\u3001\u667A\u6167\u751F\u6D3B\u3001\u667A\u80FD\u6C7D\u8F66\u56DB\u5927\u677F\u5757\u3002</li></ul><p><strong>\u521B\u4E1A\u516C\u53F8</strong>\uFF1A</p><ul><li>e \u7B7E\u5B9D\uFF08\u603B\u90E8\uFF09\u505A\u7535\u5B50\u7B7E\u540D</li><li>\u5A5A\u793C\u7EAA\uFF08\u603B\u90E8\uFF09\u597D\u591A\u7ED3\u5A5A\u7684\u670B\u53CB\u90FD\u7528</li><li>\u5927\u641C\u8F66\uFF08\u603B\u90E8\uFF09\u4E2D\u56FD\u9886\u5148\u7684\u6C7D\u8F66\u4EA4\u6613\u670D\u52A1\u4F9B\u5E94\u5546</li><li>\u4E8C\u66F4\uFF08\u603B\u90E8\uFF09\u81EA\u5A92\u4F53</li><li>\u4E01\u9999\u56ED\uFF08\u603B\u90E8\uFF09</li></ul><hr><p>\u662F\u4E0D\u662F\u6709\u70B9\u5E94\u63A5\u4E0D\u6687\u3001\u773C\u82B1\u7F2D\u4E71\uFF1F</p><p>\u90A3\u8FD9\u7BC7\u6587\u7AE0\u5C31\u6311\u4E00\u4E9B\u6BD4\u8F83\u6709\u4EE3\u8868\u6027\u7684\u6765\u4ECB\u7ECD\u4E00\u4E0B\u3002\u5E0C\u671B\u80FD\u5BF9\u5C0F\u4F19\u4F34\u4EEC\u5728\u9009\u62E9\u516C\u53F8\u7684\u65F6\u5019\u63D0\u4F9B\u4E00\u70B9\u70B9\u53C2\u8003\u548C\u5E2E\u52A9\u3002</p><h3 id="\u5B57\u8282\u8DF3\u52A8" tabindex="-1"><a class="header-anchor" href="#\u5B57\u8282\u8DF3\u52A8" aria-hidden="true">#</a> \u5B57\u8282\u8DF3\u52A8</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/hangzhou-3.png" alt=""></p><ul><li>\u300C\u57FA\u672C\u60C5\u51B5\u300D \uFF1A\u5B57\u8282\u603B\u90E8\u5728\u5317\u4EAC\uFF0C\u5728\u4E0A\u6D77\u3001\u6DF1\u5733\u3001\u676D\u5DDE\u3001\u5E7F\u5DDE\u3001\u6210\u90FD\u7B49\u5730\u90FD\u6709\u529E\u516C\u5BA4\u3002\u53BB\u5E74 6 \u6708\uFF0C\u6296\u97F3\u7535\u5546\u843D\u6237\u676D\u5DDE\u3002</li><li>\u300C\u4E1A\u52A1\u65B9\u5411\u300D \uFF1A\u6296\u97F3\u7535\u5546\u3001\u6296\u97F3\u9910\u996E\u3001\u5B57\u8282\u8DF3\u52A8\u5E7F\u544A\u4E1A\u52A1\u3001\u5B57\u8282\u8DF3\u52A8\u672C\u5730\u751F\u6D3B</li><li>\u300C\u5DE5\u4F5C\u5730\u70B9\u300D \uFF1A\u4F59\u676D\u533A\u4E2D\u56FD\u676D\u5DDE 5G \u521B\u65B0\u56ED 5 \u5C42\u3001\u4F59\u676D\u533A\u676D\u5DDE\u5DE8\u91CF\u5F15\u64CE\u7F51\u7EDC\u6280\u672F\u6709\u9650\u516C\u53F8 1401</li><li>\u300C\u798F\u5229\u60C5\u51B5\u300D\uFF1A\u516D\u9669\u4E00\u91D1(12%)\u3001\u5305\u4E09\u9910\u3001\u514D\u8D39\u4E0B\u5348\u8336+\u96F6\u98DF\u3001\u514D\u8D39\u5065\u8EAB\u623F\u3001Top \u85AA\u916C\u3001\u4F4F\u623F\u8865\u8D34</li><li>\u300C\u62DB\u8058\u60C5\u51B5\u300D\uFF1A\u4E3B\u8981\u62DB\u8058\u540E\u7AEF\uFF08Java\u3001Go\uFF09\u3001\u524D\u7AEF\u3001\u6D4B\u8BD5\u7B49\u5C97\u4F4D\u3002</li><li>\u300C\u9762\u8BD5\u300D \uFF1A\u9762\u8BD5\u8FD9\u5757\u7684\u8BDD\uFF0C\u4E3B\u8981\u662F\u95EE\u8BA1\u7B97\u673A\u57FA\u7840\u77E5\u8BC6\uFF0C\u4E00\u822C\u5148\u4F1A\u8BA9\u4F60\u505A\u4E00\u9053\u7B97\u6CD5\u9898\uFF0C\u7B97\u6CD5\u9898\u7684\u96BE\u5EA6\u8FD8\u662F\u6BD4\u8F83\u5927\u7684\u3002\u5B57\u8282\u7684\u9762\u8BD5\u6709\u4E2A\u597D\u5904\u662F\u53EF\u4EE5\u5BF9\u4F60\u53CD\u590D\u8FDB\u884C\u6253\u635E\uFF0C\u5C31\u662F\u8BF4\u4F60\u9762\u6302\u4E00\u4E2A\u90E8\u95E8\u4EE5\u540E\uFF0C\u53EF\u4EE5\u9A6C\u4E0A\u518D\u8F6C\u6295\u53E6\u4E00\u4E2A\u90E8\u95E8\uFF0C\u5E76\u4E14\u597D\u591A\u90E8\u95E8\u662F\u4E0D\u7528\u7B14\u8BD5\u76F4\u63A5\u8FDB\u9762\u8BD5\u7684\u3002</li></ul><h3 id="\u963F\u91CC\u7CFB" tabindex="-1"><a class="header-anchor" href="#\u963F\u91CC\u7CFB" aria-hidden="true">#</a> \u963F\u91CC\u7CFB</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/hangzhou-4.png" alt=""></p><ul><li>\u300C\u57FA\u672C\u60C5\u51B5\u300D \uFF1A\u963F\u91CC\u7CFB\u5360\u636E\u4E86\u676D\u5DDE\u4E92\u8054\u7F51\u7684\u4E00\u7247\u5929\uFF0C\u76F8\u5173\u8054\u7684\u4F01\u4E1A\u662F\u5728\u662F\u592A\u591A\u4E86\u3002</li><li>\u300C\u4E1A\u52A1\u65B9\u5411\u300D \uFF1A\u8FBE\u6469\u9662\u3001\u6DD8\u5B9D\u3001\u83DC\u9E1F\u3001\u9489\u9489\u3001\u98DE\u732A\u3001\u76D2\u9A6C\u3001\u652F\u4ED8\u5B9D\u3001\u5938\u514B\u3001UC\u3001\u4E66\u65D7\u5C0F\u8BF4......</li><li>\u300C\u5DE5\u4F5C\u5730\u70B9\u300D \uFF1A\u897F\u6E56\u533A\u3001\u6EE8\u6C5F\u533A\u3001\u4F59\u676D\u533A......</li><li>\u300C\u798F\u5229\u60C5\u51B5\u300D\uFF1A7 \u9669\u4E00\u91D1\uFF08\u5168\u989D\u4F4F\u623F\u516C\u79EF\u91D1\uFF09\u3001\u8282\u65E5\u793C\u7269\u3001\u5E26\u85AA\u5047\u671F\u3001\u96C6\u4F53\u5A5A\u793C\u3002</li><li>\u300C\u62DB\u8058\u60C5\u51B5\u300D\uFF1A\u4E3B\u8981\u62DB\u8058 Java \u540E\u7AEF\u5F00\u53D1\u3001\u6570\u636E\u7814\u53D1\u3001\u6570\u636E\u5206\u6790\u3001\u7B97\u6CD5\u5DE5\u7A0B\u5E08\u7B49\u5C97\u4F4D\u3002</li><li>\u300C\u9762\u8BD5\u300D \uFF1A\u4E0D\u8BBA\u662F\u6821\u62DB\u8FD8\u662F\u793E\u62DB\uFF0C\u6280\u672F\u9762\u8BD5\u95EE\u7684\u90FD\u6BD4\u8F83\u6DF1\u5165\uFF0C\u901A\u5E38\u4F1A\u9488\u5BF9\u4E00\u4E2A\u6280\u672F\u95EE\u9898\u6DF1\u5165\u6316\u4E0B\u53BB\u3002</li><li>\u300C\u8865\u5145\u300D \uFF1A\u52A0\u73ED\u7684\u95EE\u9898\u6BD4\u8F83\u4E25\u91CD\uFF0C\u53D7\u4E0D\u4E86 996 \u7684\u5C0F\u4F19\u4F34\u614E\u91CD\u8003\u8651\u3002</li></ul><h3 id="\u4EAC\u4E1C" tabindex="-1"><a class="header-anchor" href="#\u4EAC\u4E1C" aria-hidden="true">#</a> \u4EAC\u4E1C</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/hangzhou-5.png" alt=""></p><ul><li>\u300C\u57FA\u672C\u60C5\u51B5\u300D \uFF1A\u4EAC\u4E1C\u5728\u676D\u5DDE\u4E5F\u6709\u62DB\u8058\uFF0C\u4E0D\u8FC7\uFF0C\u62DB\u8058\u7684\u5C97\u4F4D\u6BD4\u8F83\u5C11\u3002</li><li>\u300C\u4E1A\u52A1\u65B9\u5411\u300D \uFF1A\u4EAC\u4E1C\u91D1\u878D\u3001\u4EAC\u4E1C\u4E91</li><li>\u300C\u5DE5\u4F5C\u5730\u70B9\u300D \uFF1A\u676D\u5DDE\u62F1\u5885\u533A\u4E2D\u56FD\u667A\u6167\u4FE1\u606F\u4EA7\u4E1A\u56ED M \u5EA7 12 \u697C</li><li>\u300C\u798F\u5229\u60C5\u51B5\u300D\uFF1A\u4E94\u9669\u4E00\u91D1\u3001\u5E74\u5EA6\u4F53\u68C0\u3001\u4F4F\u623F\u8865\u52A9\u3001\u9910\u8865\u3001\u5E26\u85AA\u5047\u671F</li><li>\u300C\u62DB\u8058\u60C5\u51B5\u300D\uFF1A\u4E3B\u8981\u62DB\u8058 Java\u3001\u4EA7\u54C1\u7ECF\u7406\u7B49\u5C97\u4F4D</li><li>\u300C\u9762\u8BD5\u300D \uFF1A\u4EAC\u4E1C\u7684\u6280\u672F\u9762\u8BD5\u91C7\u7528\u5E38\u89C4\u9762\u8BD5\uFF0C\u5E76\u4E14\u95EE\u7684\u76F8\u5BF9\u7B80\u5355\u4E00\u4E9B\uFF0C\u800C\u4E14\u53EF\u4EE5\u90E8\u95E8\u76F4\u62DB\uFF0C\u4E0D\u9700\u8981\u7B14\u8BD5\u3002\u6280\u672F\u9762\u8BD5\u6709\u65F6\u5019\u662F\u4E24\u8F6E\uFF0C\u6709\u65F6\u5019\u662F\u4E09\u8F6E\u3002\u5728\u4EAC\u4E1C\u5982\u679C\u4E24\u8F6E\u9762\u8BD5\u4EE5\u540E\u4F60\u76F4\u63A5\u9047\u5230\u4E86 HR \u5BF9\u4F60\u9762\u8BD5\uFF0C\u4F60\u4E00\u822C\u5C31\u662F\u666E\u901A offer \u4E86\u3002\u7B2C\u4E09\u8F6E\u7684\u4E3B\u7BA1\u9762\u4F1A\u51B3\u5B9A\u662F\u5426\u7ED9\u4F60 sp\u3002\u4F46\u662F\uFF01\u636E\u6211\u6240\u77E5\uFF0C\u4EAC\u4E1C HR \u9762\u6302\u6389\u7684\u4EBA\u8FD8\u633A\u591A\u7684\uFF0C\u6240\u4EE5\u4EAC\u4E1C\u7684\u6280\u672F\u9762\u8D70\u5B8C\u4EE5\u540E\u8FD8\u4E0D\u592A\u7A33\u3002HR \u9762\u5B8C\u4F60\u4EE5\u540E\uFF0C\u5982\u679C\u9694\u4E00\u6BB5\u65F6\u95F4\u95EE\u4E86\u4F60\u8EAB\u4EFD\u8BC1\u53F7\uFF0C\u5E76\u6838\u5BF9\u4F60\u6BD5\u4E1A\u65F6\u95F4\u540E\uFF0C\u8FD9\u5C31\u5F88\u7A33\u4E86\u3002</li></ul><h3 id="\u7F51\u6613" tabindex="-1"><a class="header-anchor" href="#\u7F51\u6613" aria-hidden="true">#</a> \u7F51\u6613</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/hangzhou-6.png" alt=""></p><ul><li>\u300C\u57FA\u672C\u60C5\u51B5\u300D \uFF1A\u7F51\u6613\u5728\u676D\u5DDE\u6709\u4E00\u4E2A\u7814\u7A76\u9662\uFF0C\u6210\u7ACB\u4E8E 2006 \u5E74 6 \u6708\u3002</li><li>\u300C\u4E1A\u52A1\u65B9\u5411\u300D \uFF1A\u2F79\u6613\u676D\u5DDE\u7814\u7A76\u9662\uFF0C\u7B80\u79F0\u201C\u676D\u7814\u201D\u3002\u676D\u7814\u662F\u2F79\u6613\u5185\u90E8\u7684\u57FA\u7840\u6280\u672F\u7814\u53D1\u4E2D\u2F3C\u548C\u524D\u6CBF\u6280\u672F\u7814\u7A76\u4E2D\u2F3C\uFF0C\u5728\u4E91\u8BA1\u7B97\u3001\u2F24\u6570\u636E\u3001\u5B89\u5168\u3001\u2F08\u2F2F\u667A\u80FD\u7B49\u2F45\u2FAF\u8FDB\u2F8F\u524D\u6CBF\u6280\u672F\u7814\u7A76\u3001\u5173\u952E\u6280\u672F\u653B\u5173\u548C\u57FA\u7840\u6280\u672F\u5E73\u53F0\u7814\u53D1\uFF0C\u670D\u52A1\u2F79\u6613\u7CFB\u6E38\u620F\u3001\u90AE\u7BB1\u3001\u2FB3\u4E50\u3001\u7535\u5546\u3001\u65B0\u95FB\u3001\u5728\u7EBF\u6559\u80B2\u7B49\u4EA7\u54C1\uFF0C\u89E6\u8FBE\u8FD1 10 \u4EBF\u2F64\u6237\u3002</li><li>\u300C\u5DE5\u4F5C\u5730\u70B9\u300D \uFF1A\u676D\u5DDE\u6EE8\u6C5F\u533A\u7F51\u6613\u5927\u53A6\u4E8C\u671F\u7F51\u5546\u8DEF 399 \u53F7</li><li>\u300C\u798F\u5229\u60C5\u51B5\u300D\uFF1A\u8FD0\u52A8\u8BBE\u65BD\u3001\u751F\u65E5\u793C\u7269\u3001\u514D\u8D39\u73ED\u8F66\u3001\u4E94\u9669\u4E00\u91D1\u3001\u8865\u5145\u533B\u7597\u9669\u3001\u91CD\u75BE\u9669\u3001\u610F\u5916\u9669\u3001\u5B9A\u671F\u5BFF\u9669</li><li>\u300C\u62DB\u8058\u60C5\u51B5\u300D\uFF1A\u4E3B\u8981\u62DB\u8058 Java \u3001\u524D\u7AEF\u3001\u533A\u5757\u94FE\u7B49\u5C97\u4F4D\u3002</li><li>\u300C\u9762\u8BD5\u300D \uFF1A\u6280\u672F\u9762\u8BD5\u901A\u5E38\u7531 2 \u8F6E\uFF0C\u6700\u540E 1 \u8F6E\u4E00\u822C\u662F hr \u9762\u3002\u6CE8\u91CD\u9879\u76EE\u548C\u57FA\u672C\u529F , \u65E2\u8981\u6709\u5E7F\u5EA6\u8FD8\u8981\u6709\u6DF1\u5EA6\u3002</li></ul><h3 id="\u534E\u4E3A" tabindex="-1"><a class="header-anchor" href="#\u534E\u4E3A" aria-hidden="true">#</a> \u534E\u4E3A</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/hangzhou-7.png" alt=""></p><ul><li>\u300C\u57FA\u672C\u60C5\u51B5\u300D \uFF1A\u534E\u4E3A\u5728\u676D\u5DDE\u6709\u4E00\u4E2A\u7814\u7A76\u6240\u3002</li><li>\u300C\u4E1A\u52A1\u65B9\u5411\u300D \uFF1A\u667A\u80FD\u6444\u50CF\u673A\u3001\u4E91\u670D\u52A1</li><li>\u300C\u5DE5\u4F5C\u5730\u70B9\u300D \uFF1A\u676D\u5DDE\u6EE8\u6C5F\u533A\u534E\u4E3A\u6280\u672F\u6709\u9650\u516C\u53F8\u676D\u5DDE\u7814\u7A76\u6240</li><li>\u300C\u798F\u5229\u60C5\u51B5\u300D\uFF1A\u5458\u5DE5\u80A1\u6743\u6FC0\u52B1\u3001\u85AA\u8D44\u975E\u5E38\u6709\u7ADE\u4E89\u529B\u3002\u534E\u4E3A\u6821\u62DB\u6839\u636E\u9762\u8BD5\u8BC4\u5206\u7ED9\u5E94\u5C4A\u751F\u8FDB\u884C\u8BC4\u7EA7\uFF0C\u672C\u79D1\u751F\u548C\u7855\u58EB\u751F\u7684\u8BC4\u7EA7\u5728 13 \u7EA7 \u548C 15 \u7EA7 \u4E4B\u95F4\uFF0C\u6BCF\u4E00\u7EA7\u53C8\u5206\u4E3A A\u3001B\u3001C \u4E09\u4E2A\u6863\u3002\u6839\u636E\u8BC4\u7EA7\u8FDB\u884C\u5DE5\u8D44\u7684\u8BC4\u5B9A\uFF0C13 \u7EA7 \u548C 14 \u7EA7 \u7684\u7A0E\u524D\u5DE5\u8D44\u5728\u6BCF\u6708 13-19k \u4E4B\u95F4\uFF0C\u6BCF\u5E74 14 \u85AA\u300215 \u7EA7 \u9700\u8981\u7279\u522B\u4F18\u79C0\u7684\u7855\u58EB\u624D\u80FD\u62FF\u5230\uFF0C\u5DE5\u8D44\u5E74\u5305\u57FA\u672C\u5728\u7A0E\u524D 30 \u4E07 - 40 \u4E07\u4E4B\u95F4\u3002</li><li>\u300C\u62DB\u8058\u60C5\u51B5\u300D\uFF1A\u4E3B\u8981\u62DB\u8058\u8F6F\u4EF6\u5F00\u53D1\uFF08Java\u3001C++\uFF09\u3001\u5D4C\u5165\u5F0F\u5F00\u53D1\u3001\u6D4B\u8BD5\u7B49\u5C97\u4F4D\u3002\u53E6\u5916\uFF0C\u534E\u4E3A\u793E\u62DB\u4E00\u822C\u90FD\u662F OD \u6A21\u5F0F\u3002</li><li>\u300C\u9762\u8BD5\u300D \uFF1A\u9762\u8BD5\u7684\u8BDD\uFF0C\u96BE\u5EA6\u4E00\u822C\uFF0C\u4E3B\u8981\u770B\u5B66\u5386\u3002</li><li>\u300C\u8865\u5145\u300D : \u534E\u4E3A\u52A0\u73ED\u6BD4\u8F83\u591A\uFF0C\u538B\u529B\u53EF\u80FD\u4F1A\u6BD4\u8F83\u5927\u3002\u4E0D\u8FC7\uFF0C\u85AA\u8D44\u6536\u5165\u5728\u5168\u56FD\u7EDD\u5BF9\u662F Top \u7EA7\u522B\u3002</li></ul><h3 id="\u4E2D\u79FB\u676D\u7814" tabindex="-1"><a class="header-anchor" href="#\u4E2D\u79FB\u676D\u7814" aria-hidden="true">#</a> \u4E2D\u79FB\u676D\u7814</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/hangzhou-8.png" alt=""></p><ul><li>\u300C\u57FA\u672C\u60C5\u51B5\u300D \uFF1A\u4E2D\u56FD\u79FB\u52A8\u7684\u4E00\u4E2A\u5168\u8D44\u5B50\u516C\u53F8\uFF0C2014 \u5E74\u5728\u676D\u5DDE\u6210\u7ACB\u3002</li><li>\u300C\u4E1A\u52A1\u65B9\u5411\u300D \uFF1A\u7EDF\u4E00\u8BA4\u8BC1\u3001\u878D\u5408\u901A\u4FE1\u3001\u9B54\u56FA\u4E91</li><li>\u300C\u5DE5\u4F5C\u5730\u70B9\u300D \uFF1A\u676D\u5DDE\u4F59\u676D\u533A\u4E2D\u56FD\u79FB\u52A8(\u676D\u5DDE\u7814\u53D1\u4E2D\u5FC3)\u4F59\u676D\u5858\u8DEF 1600 \u53F7</li><li>\u300C\u798F\u5229\u60C5\u51B5\u300D\uFF1A\u4E94\u9669\u4E24\u91D1\uFF08\u4F01\u4E1A\u5E74\u91D1\uFF09\u3001\u8865\u5145\u533B\u7597\u4FDD\u9669\u3001\u610F\u5916\u4FDD\u9669\u3001\u5E26\u85AA\u5047\u671F</li><li>\u300C\u62DB\u8058\u60C5\u51B5\u300D\uFF1A\u4E3B\u8981\u62DB\u8058\u524D\u7AEF\u3001\u540E\u7AEF\u3001\u5B89\u5353\u3001\u7B97\u6CD5\u7B49\u5C97\u4F4D\u3002</li><li>\u300C\u9762\u8BD5\u300D \uFF1A\u9762\u8BD5\u7684\u8BDD\uFF0C\u96BE\u5EA6\u4E00\u822C\uFF0C\u4E3B\u8981\u770B\u5B66\u5386\u3002</li></ul><h3 id="\u4E4B\u6C5F\u5B9E\u9A8C\u5BA4" tabindex="-1"><a class="header-anchor" href="#\u4E4B\u6C5F\u5B9E\u9A8C\u5BA4" aria-hidden="true">#</a> \u4E4B\u6C5F\u5B9E\u9A8C\u5BA4</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/hangzhou-9.png" alt=""></p><ul><li>\u300C\u57FA\u672C\u60C5\u51B5\u300D \uFF1A\u4E4B\u6C5F\u5B9E\u9A8C\u5BA4\u662F\u6D59\u6C5F\u7701\u59D4\u3001\u7701\u653F\u5E9C\u8D2F\u5F7B\u843D\u5B9E\u79D1\u6280\u521B\u65B0\u601D\u60F3\uFF0C\u6DF1\u5165\u5B9E\u65BD\u521B\u65B0\u9A71\u52A8\u53D1\u5C55\u6218\u7565\u7684\u91CD\u5927\u79D1\u6280\u521B\u65B0\u5E73\u53F0\u3002</li><li>\u300C\u4E1A\u52A1\u65B9\u5411\u300D \uFF1A\u667A\u80FD\u611F\u77E5\u3001\u667A\u80FD\u8BA1\u7B97\u3001\u667A\u80FD\u7F51\u7EDC\u3001\u667A\u80FD\u7CFB\u7EDF</li><li>\u300C\u5DE5\u4F5C\u5730\u70B9\u300D \uFF1A\u676D\u5DDE\u5E02\u4F59\u676D\u533A\u6587\u4E00\u897F\u8DEF 1818 \u53F7\u4E2D\u56FD\u4EBA\u5DE5\u667A\u80FD\u5C0F\u9547 10 \u53F7\u697C</li><li>\u300C\u798F\u5229\u60C5\u51B5\u300D\uFF1A\u4E94\u9669\u4E00\u91D1\u3001Top \u85AA\u8D44\u3001\u4F4F\u623F\u4FDD\u969C\u3001\u4F18\u60E0\u7A0E\u6536\u3001\u5E26\u85AA\u5047\u671F\u3001\u9910\u8865</li><li>\u300C\u62DB\u8058\u60C5\u51B5\u300D\uFF1A\u4E3B\u8981\u62DB\u8058\u8F6F\u4EF6\u5F00\u53D1\u3001\u82AF\u7247\u8BBE\u8BA1\u3001DevOps \u3001\u6D4B\u8BD5\u7B49\u5C97\u4F4D</li><li>\u300C\u9762\u8BD5\u300D \uFF1A\u5BF9\u5B66\u5386\u8981\u6C42\u7279\u522B\u9AD8\uFF01</li></ul><h3 id="\u540C\u82B1\u987A" tabindex="-1"><a class="header-anchor" href="#\u540C\u82B1\u987A" aria-hidden="true">#</a> \u540C\u82B1\u987A</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/hangzhou-10.png" alt=""></p><ul><li>\u300C\u57FA\u672C\u60C5\u51B5\u300D \uFF1A\u540C\u82B1\u987A\u6210\u7ACB\u4E8E 2001 \u5E74,\u603B\u90E8\u4F4D\u4E8E\u676D\u5DDE\u672A\u6765\u79D1\u6280\u57CE\uFF0C\u662F\u56FD\u5185\u7B2C\u4E00\u5BB6\u4E92\u8054\u7F51\u91D1\u878D\u4FE1\u606F\u670D\u52A1\u4E1A\u4E0A\u5E02\u516C\u53F8\u3002\u540C\u82B1\u987A\u4F5C\u4E3A\u4E00\u5BB6\u4E92\u8054\u7F51\u91D1\u878D\u4FE1\u606F\u63D0\u4F9B\u5546\uFF0C\u81F4\u529B\u4E8E\u4E3A\u5404\u7C7B\u673A\u6784\u63D0\u4F9B\u8F6F\u4EF6\u4EA7\u54C1\u548C\u7CFB\u7EDF\u7EF4\u62A4\u670D\u52A1\u3001\u91D1\u878D\u6570\u636E\u670D\u52A1\u548C\u667A\u80FD\u63A8\u5E7F\u670D\u52A1\uFF0C\u4E3A\u4E2A\u4EBA\u6295\u8D44\u8005\u63D0\u4F9B\u91D1\u878D\u8D44\u8BAF\u548C\u6295\u8D44\u7406\u8D22\u5206\u6790\u5DE5\u5177\u3002</li><li>\u300C\u4E1A\u52A1\u65B9\u5411\u300D \uFF1A\u65D7\u4E0B\u6709\u591A\u6B3E\u70ED\u95E8\u6295\u8D44\u7406\u8D22\u7C7B APP\u3002</li><li>\u300C\u5DE5\u4F5C\u5730\u70B9\u300D \uFF1A\u676D\u5DDE\u4F59\u676D\u533A\u540C\u82B1\u987A\u65B0\u5927\u697C\u603B\u90E8\u540C\u987A\u8857 18 \u53F7</li><li>\u300C\u798F\u5229\u60C5\u51B5\u300D\uFF1A\u85AA\u8D44\u4E2D\u7B49\u504F\u4E0A\uFF0C\u5176\u4ED6\u798F\u5229\u60C5\u51B5\u672A\u77E5</li><li>\u300C\u62DB\u8058\u60C5\u51B5\u300D\uFF1A\u4E3B\u8981\u62DB\u8058 Java\u3001C++\u3001\u524D\u7AEF\u3001\u673A\u5668\u5B66\u4E60\u3001\u4EA7\u54C1\u7ECF\u7406\u7B49\u5C97\u4F4D</li><li>\u300C\u9762\u8BD5\u300D \uFF1A\u6280\u672F\u9762\u8BD5\u96BE\u5EA6\u4E00\u822C\uFF0C\u800C\u4E14\u901A\u5E38\u5C31\u53EA\u6709\u4E00\u8F6E\u6280\u672F\u9762\u8BD5\u3002\u8FD9\u662F\u4E00\u4F4D\u53BB\u9762\u8BD5\u540C\u82B1\u987A\u540E\u7AEF\u5F00\u53D1\u7684\u670B\u53CB\u7ED9\u6211\u53CD\u9988\u7684\u9762\u7ECF\uFF1A\u201C\u9762\u8BD5\u5B98\u975E\u5E38\u548C\u5584\u3002\u4E0A\u6765\u5C31\u8BA9\u4F60\u505A\u4E2A\u81EA\u6211\u4ECB\u7ECD\uFF0C\u56DE\u7B54\u54EA\u91CC\u6BD5\u4E1A\uFF0C\u6BD5\u4E1A\u4E4B\u540E\u5728\u54EA\u5DE5\u4F5C\uFF0C\u719F\u6089\u7684\u6280\u672F\u6808\u3002\u7136\u540E\u95EE\u4E86\u4E3A\u4EC0\u4E48\u79BB\u804C\u4E4B\u7C7B\u7684\u3002\u4E4B\u540E\u5F00\u59CB\u95EE\u4E4B\u524D\u505A\u7684\u9879\u76EE\uFF0C\u91CD\u70B9\u95EE\u4F60\u505A\u4E86\u54EA\u4E9B\u6709\u4EAE\u70B9\u7684\u9879\u76EE\uFF0C\u968F\u4FBF\u7B54\u4E86\u4E2A\u9AD8\u5E76\u53D1\u4E0B\u4FDD\u8BC1\u539F\u5B50\u6027\u7684\u9879\u76EE\uFF0C\u7136\u540E\u548C\u9762\u8BD5\u5B98\u4E00\u8D77\u8BA8\u8BBA\u4F1A\u4E0D\u4F1A\u6709\u66F4\u597D\u7684\u89E3\u51B3\u529E\u6CD5\u3002\u201D</li></ul><h3 id="_51-\u4FE1\u7528\u5361" tabindex="-1"><a class="header-anchor" href="#_51-\u4FE1\u7528\u5361" aria-hidden="true">#</a> 51 \u4FE1\u7528\u5361</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/hangzhou-11.png" alt=""></p><ul><li>\u300C\u57FA\u672C\u60C5\u51B5\u300D \uFF1A51 \u4FE1\u7528\u5361\uFF08\u6BCD\u516C\u53F8\u4E3A\u676D\u5DDE\u6069\u725B\u7F51\u7EDC\u6280\u672F\u6709\u9650\u516C\u53F8\uFF09\uFF0C\u516C\u53F8\u521B\u7ACB\u4E8E 2012 \u5E74\uFF0C\u662F\u4E00\u5BB6\u670D\u52A1\u4E8E\u4E2D\u56FD\u4EBF\u4E07\u4FE1\u7528\u5361\u7528\u6237\u7684\u4E92\u8054\u7F51\u91D1\u878D\u516C\u53F8\u3002</li><li>\u300C\u4E1A\u52A1\u65B9\u5411\u300D \uFF1A\u65D7\u4E0B\u6709\u201C51 \u4FE1\u7528\u5361\u7BA1\u5BB6\u201D\u3001\u201C51 \u4EBA\u54C1\u201D\u3001\u201C51 \u4EBA\u54C1\u8D37\u201D\u7B49 APP</li><li>\u300C\u5DE5\u4F5C\u5730\u70B9\u300D \uFF1A\u676D\u5DDE\u897F\u6E56\u533A\u4E2D\u8282\u80FD\xB7\u897F\u6EAA\u9996\u5EA7 B3\u3001\u676D\u5DDE\u897F\u6E56\u533A\u897F\u6EAA\u8C37 G \u5EA7</li><li>\u300C\u798F\u5229\u60C5\u51B5\u300D\uFF1A\u516D\u9669\u4E00\u91D1\u3001\u751F\u65E5\u793C\u7269\u3001\u8282\u65E5\u8D3A\u793C\u3001\u751F\u80B2\u5173\u6000\u3001\u7CBE\u5F69\u56E2\u5EFA\u3001\u5E74\u5EA6\u4F53\u68C0\u3001\u5E74\u5EA6\u65C5\u6E38</li><li>\u300C\u62DB\u8058\u60C5\u51B5\u300D\uFF1A\u4E3B\u8981\u62DB\u8058 Java\u3001\u524D\u7AEF\u3001\u5B89\u5168\u3001\u6570\u636E\u4ED3\u5E93\u7B49\u5C97\u4F4D</li><li>\u300C\u9762\u8BD5\u300D \uFF1A\u9762\u8BD5\u96BE\u5EA6\u4E00\u822C\u3002\u6280\u672F\u9762\u8BD5\u4E00\u822C\u4F1A\u6709 2 \u9762\uFF0C\u6700\u540E\u4E00\u9762\u662F HR \u9762\u3002 \u672C\u571F\u4E92\u8054\u7F51\u516C\u53F8</li></ul><h3 id="\u8611\u83C7\u8857" tabindex="-1"><a class="header-anchor" href="#\u8611\u83C7\u8857" aria-hidden="true">#</a> \u8611\u83C7\u8857</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/hangzhou-12.png" alt=""></p><ul><li>\u300C\u57FA\u672C\u60C5\u51B5\u300D \uFF1A2011 \u5E74\uFF0C\u8611\u83C7\u8857\u6B63\u5F0F\u4E0A\u7EBF\uFF0C2016 \u5E74 1 \u6708\u4E0E\u7F8E\u4E3D\u8BF4\u6218\u7565\u878D\u5408\uFF0C\u516C\u53F8\u65D7\u4E0B\u5305\u62EC\uFF1A\u8611\u83C7\u8857\u3001\u7F8E\u4E3D\u8BF4\u3001uni \u7B49\u4EA7\u54C1\u4E0E\u670D\u52A1\u3002</li><li>\u300C\u4E1A\u52A1\u65B9\u5411\u300D \uFF1A\u7535\u5546</li><li>\u300C\u5DE5\u4F5C\u5730\u70B9\u300D \uFF1A\u676D\u5DDE\u897F\u6E56\u533A\u9EC4\u9F99\u4E07\u79D1\u4E2D\u5FC3 G \u5EA7</li><li>\u300C\u798F\u5229\u60C5\u51B5\u300D\uFF1A\u65E0\u9650\u7684\u96F6\u98DF\u996E\u6599\u4F9B\u5E94\u3001\u5065\u8EAB\u623F\u3001\u5496\u5561\u5385\u3001</li><li>\u300C\u62DB\u8058\u60C5\u51B5\u300D\uFF1A\u4E3B\u8981\u62DB\u8058 Java \u540E\u7AEF\u3001\u524D\u7AEF\u3001\u79FB\u52A8\u5F00\u53D1\u7B49\u5C97\u4F4D\u3002</li><li>\u300C\u9762\u8BD5\u300D \uFF1A\u9762\u8BD5\u96BE\u5EA6\u4E2D\u7B49\u3002\u6280\u672F\u9762\u8BD5\u4E00\u822C\u4F1A\u6709 2 \u9762\uFF0C\u6700\u540E\u4E00\u9762\u662F HR \u9762\u3002</li><li>\u300C\u8865\u5145\u300D : \u636E\u8BF4\u516C\u53F8\u7684\u5DE5\u4F5C\u4F53\u9A8C\u8FD8\u4E0D\u9519\uFF01</li></ul><h3 id="\u6709\u8D5E" tabindex="-1"><a class="header-anchor" href="#\u6709\u8D5E" aria-hidden="true">#</a> \u6709\u8D5E</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/hangzhou-13.png" alt=""></p><ul><li>\u300C\u57FA\u672C\u60C5\u51B5\u300D \uFF1A\u6709\u8D5E\uFF0C\u539F\u540D\u53E3\u888B\u901A\uFF0C2012 \u5E74 11 \u6708 27 \u65E5\u5728\u676D\u5DDE\u8D1D\u5854\u5496\u5561\u9986\u5B75\u5316\u6210\u7ACB\uFF0C\u662F\u4E00\u5BB6\u4E3B\u8981\u4ECE\u4E8B\u96F6\u552E\u79D1\u6280 SaaS \u670D\u52A1\u7684\u4F01\u4E1A\uFF0C\u5E2E\u52A9\u5546\u5BB6\u8FDB\u884C\u7F51\u4E0A\u5F00\u5E97\u3001\u793E\u4EA4\u8425\u9500\u3001\u63D0\u9AD8\u7559\u5B58\u590D\u8D2D\uFF0C\u62D3\u5C55\u5168\u6E20\u9053\u65B0\u96F6\u552E\u4E1A\u52A1\u30022014 \u5E74 11 \u6708 27 \u65E5\uFF0C\u53E3\u888B\u901A\u6B63\u5F0F\u66F4\u540D\u4E3A\u6709\u8D5E\u30022018 \u5E74 4 \u6708 18 \u65E5\uFF0C\u6709\u8D5E\u5B8C\u6210\u5728\u6E2F\u4E0A\u5E02\u30022019 \u5E74 4 \u6708\uFF0C\u817E\u8BAF\u9886\u6295\u6709\u8D5E 10 \u4EBF\u6E2F\u5143\u878D\u8D44\u3002</li><li>\u300C\u4E1A\u52A1\u65B9\u5411\u300D \uFF1ASaaS \u670D\u52A1\uFF08\u5E2E\u52A9\u5546\u5BB6\u7F51\u4E0A\u5F00\u5E97\u3001\u793E\u4EA4\u8425\u9500......\uFF09\u3001PaaS \u4E91\u670D\u52A1\u3002</li><li>\u300C\u5DE5\u4F5C\u5730\u70B9\u300D \uFF1A\u676D\u5DDE\u897F\u6E56\u533A\u676D\u5DDE\u6709\u8D5E\u79D1\u6280\u6709\u9650\u516C\u53F8\u897F\u6EAA\u8DEF 698 \u53F7\u3001\u676D\u5DDE\u897F\u6E56\u533A\u9EC4\u9F99\u4E07\u79D1\u4E2D\u5FC3 G \u5EA7</li><li>\u300C\u798F\u5229\u60C5\u51B5\u300D\uFF1A\u5168\u989D\u4E94\u9669\u4E00\u91D1\uFF0C\u516C\u79EF\u91D1 12%+\u996D\u8865+\u8BDD\u8D39\u8865\u52A9</li><li>\u300C\u62DB\u8058\u60C5\u51B5\u300D\uFF1A\u4E3B\u8981\u62DB\u8058\u540E\u7AEF\u3001\u524D\u7AEF\u3001\u79FB\u52A8\u5F00\u53D1\u7B49\u5C97\u4F4D\u3002</li><li>\u300C\u9762\u8BD5\u300D \uFF1A\u9762\u8BD5\u96BE\u5EA6\u4E2D\u7B49\u504F\u4E0A\u3002\u4E00\u822C\u6709 3 \u8F6E\u9762\u8BD5\uFF0C\u524D 2 \u9762\u662F\u6280\u672F\u9762\uFF0C\u6700\u540E 1 \u9762\u662F HR \u9762\u3002\u8FD9\u662F\u6211\u7684\u4E00\u4F4D\u53BB\u9762\u8BD5\u6709\u8D5E Java \u540E\u7AEF\u5F00\u53D1\u7684\u670B\u53CB\u7ED9\u6211\u53CD\u9988\u7684\u9762\u7ECF\uFF1A\u201C\u9762\u8BD5\u5B98\u5F88\u770B\u91CD\u4E13\u4E1A\u6280\u80FD\uFF0C1 \u9762\u95EE\u57FA\u7840\uFF0C\u5F88\u7EC6\u5F88\u5E7F\uFF0C\u80FD\u95EE\u7684\u57FA\u672C\u90FD\u95EE\u4E86\u4E2A\u904D\u3002Java \u57FA\u7840\u3001\u591A\u7EBF\u7A0B\u3001JVM\u3001RPC\u3001\u9650\u6D41\u7B97\u6CD5\u3001\u964D\u7EA7\u7B97\u6CD5\u3001\u5206\u5E03\u5F0F\u4E8B\u52A1\u4E2D\u95F4\u4EF6\u3001Redis\u3001\u5206\u5E03\u5F0F\u9501......2 \u9762\u8DDF 1 \u9762\u76F8\u6BD4\u5DEE\u4E0D\u592A\u591A\uFF0C\u6709\u4E9B\u504F\u91CD\u89E3\u51B3\u95EE\u9898\u601D\u8DEF\u30023 \u9762\u4EA4\u6D41\u4E86\u4E0B\u4E2A\u4EBA\u60C5\u51B5\u4E5F\u63D0\u4E86\u5F88\u591A\u5EFA\u8BAE\u3002\u201D</li><li>\u300C\u8865\u5145\u300D : \u516C\u53F8\u6280\u672F\u4E0D\u9519\uFF01\u4E3B\u8981\u62DB\u8058 Java \u5F00\u53D1\uFF0C\u505A Java \u7684\u53EF\u4EE5\u4F18\u5148\u8003\u8651\u8FD9\u5BB6\u3002</li></ul><h3 id="zoom" tabindex="-1"><a class="header-anchor" href="#zoom" aria-hidden="true">#</a> Zoom</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/hangzhou-14.png" alt=""></p><ul><li>\u300C\u57FA\u672C\u60C5\u51B5\u300D \uFF1AZoom \u662F\u4E00\u4F4D\u7F8E\u56FD\u534E\u4EBA\u4F01\u4E1A\u5BB6\u521B\u529E\u7684\u516C\u53F8\uFF0C\u4E3B\u8425\u4E1A\u52A1\u5C31\u662F\u63D0\u4F9B\u89C6\u9891\u4F1A\u8BAE\u670D\u52A1\u3002\u603B\u90E8\u4F4D\u4E8E\u7845\u8C37\uFF0C\u56FD\u5185\u7684\u8BDD\uFF0C\u676D\u5DDE\u3001\u82CF\u5DDE\u3001\u5408\u80A5\u5747\u6709\u7814\u53D1\u4E2D\u5FC3\u3002</li><li>\u300C\u4E1A\u52A1\u65B9\u5411\u300D \uFF1A\u89C6\u9891\u4F1A\u8BAE</li><li>\u300C\u5DE5\u4F5C\u5730\u70B9\u300D \uFF1A\u676D\u5DDE\u6EE8\u6C5F\u533A\u6D77\u5EB7\u5A01\u89C6\u4E1C\u6D41\u8DEF 700 \u53F7</li><li>\u300C\u798F\u5229\u60C5\u51B5\u300D\uFF1A\u5168\u989D\u4E94\u9669\u4E00\u91D1\u3001\u5546\u4E1A\u4FDD\u9669\u3001\u9910\u8865\u3001\u5E74\u5EA6\u65C5\u6E38</li><li>\u300C\u62DB\u8058\u60C5\u51B5\u300D\uFF1A\u4E3B\u8981\u62DB\u8058\u7B97\u6CD5\u3001\u6D4B\u8BD5\u3001Web \u524D\u7AEF\u3001\u5168\u6808\u3001C/C++\uFF08\u540E\u7AEF\u5F00\u53D1\u8FD9\u5757 C++\u62DB\u8058\u504F\u591A\u4E00\u4E9B\uFF09\u3001Java\u3001Go\u3002</li><li>\u300C\u9762\u8BD5\u300D \uFF1A\u96BE\u5EA6\u4E00\u822C\uFF0C\u5916\u4F01\u4E00\u822C\u6BD4\u8F83\u91CD\u89C6\u8BA1\u7B97\u673A\u57FA\u7840\u77E5\u8BC6\u3002</li><li>\u300C\u8865\u5145\u300D : Zoom \u7684\u5DE5\u4F5C\u73AF\u5883\u3001\u4F01\u4E1A\u6587\u5316\u4EC0\u4E48\u7684\u597D\u8BC4\u5EA6\u5728\u56FD\u5185\u5916\u90FD\u633A\u9AD8\u7684\u3002\u4E0D\u8FC7\uFF0C\u636E\u8BF4\u4E5F\u5B58\u5728\u90E8\u5206\u9879\u76EE\u7EC4\u52A0\u73ED\u7684\u60C5\u51B5\u3002965 \u4E0D\u52A0\u73ED\uFF0Cwork life balance\u3002\u6280\u672F\u6C1B\u56F4\u597D\uFF0C\u76F8\u5904\u7B80\u5355\u3002</li></ul><h3 id="cisco-\u601D\u79D1" tabindex="-1"><a class="header-anchor" href="#cisco-\u601D\u79D1" aria-hidden="true">#</a> Cisco(\u601D\u79D1)</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/hangzhou-15.png" alt=""></p><ul><li>\u300C\u57FA\u672C\u60C5\u51B5\u300D \uFF1A\u601D\u79D1\u7CFB\u7EDF\u516C\u53F8\uFF08Cisco Systems, Inc.\uFF09\uFF0C\u7B80\u79F0\u601D\u79D1\u516C\u53F8\u6216\u601D\u79D1\uFF0C1984 \u5E74 12 \u6708\u6B63\u5F0F\u6210\u7ACB\uFF0C\u662F\u4E92\u8054\u7F51\u89E3\u51B3\u65B9\u6848\u7684\u9886\u5148\u63D0\u4F9B\u8005\uFF0C\u5176\u8BBE\u5907\u548C\u8F6F\u4EF6\u4EA7\u54C1\u4E3B\u8981\u7528\u4E8E\u8FDE\u63A5\u8BA1\u7B97\u673A\u7F51\u7EDC\u7CFB\u7EDF\uFF0C\u603B\u90E8\u4F4D\u4E8E\u7F8E\u56FD\u52A0\u5229\u798F\u5C3C\u4E9A\u5DDE\u5723\u4F55\u585E\u3002</li><li>\u300C\u4E1A\u52A1\u65B9\u5411\u300D \uFF1A\u8DEF\u7531\u5668\u3001\u4EA4\u6362\u673A\u7B49\u7F51\u7EDC\u57FA\u7840\u8BBE\u65BD</li><li>\u300C\u5DE5\u4F5C\u5730\u70B9\u300D \uFF1A\u676D\u5DDE\u4E0A\u57CE\u533A\u4E2D\u8C6A\xB7\u671B\u6C5F\u56FD\u9645 4 \u5E62 20 \u5C42</li><li>\u300C\u798F\u5229\u60C5\u51B5\u300D\uFF1A\u5168\u989D\u4E94\u9669\u4E00\u91D1\u3001\u5546\u4E1A\u4FDD\u9669\u3001\u9910\u8865\u3001\u5E74\u5EA6\u65C5\u6E38</li><li>\u300C\u62DB\u8058\u60C5\u51B5\u300D\uFF1A\u4E3B\u8981\u62DB\u8058 Java\u3001\u524D\u7AEF\u7B49\u5C97\u4F4D</li><li>\u300C\u9762\u8BD5\u300D \uFF1A\u96BE\u5EA6\u4E2D\u7B49\u504F\u4E0A\uFF0C\u5916\u4F01\u4E00\u822C\u6BD4\u8F83\u91CD\u89C6\u8BA1\u7B97\u673A\u57FA\u7840\u77E5\u8BC6\u3002</li></ul><hr><p>\u5BF9\u4E8E\u676D\u5DDE\uFF0C\u6211\u5370\u8C61\u6700\u6DF1\u523B\u7684\u5C31\u662F\u5728\u82CF\u5DDE\u4E0A\u73ED\u65F6\u548C\u540C\u4E8B\u53BB\u4E4C\u9547-\u676D\u5DDE\u7684\u4E09\u65E5\u6E38\u4E86\uFF0C\u5F53\u65F6\u963F\u91CC\u8FD8\u6CA1\u6709\u5174\u8D77\uFF0C\u4E92\u8054\u7F51\u73AF\u5883\u4E5F\u6CA1\u6709\u73B0\u5728\u8FD9\u822C\u80FD\u5377\u3002</p><p>\u987A\u5E26\u518D\u804A\u804A\u676D\u5DDE\u7684\u623F\u4EF7\u3001\u6559\u80B2\u5427\u3002\u676D\u5DDE\u7684\u623F\u4EF7\u4E0D\u5FCD\u76F4\u89C6\u554A\uFF01\uFF01\uFF01\u6DA8\u7684\u5B9E\u5728\u662F\u592A\u5389\u5BB3\u4E86\uFF01</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/hangzhou-16.png" alt=""></p><p>\u676D\u5DDE\u53EA\u6709\u4E00\u6240 985\uFF0C\u4E5F\u5C31\u662F\u6D59\u6C5F\u5927\u5B66\u3002\u9664\u4E86\u6D59\u6C5F\u5927\u5B66\u4E4B\u5916\uFF0C\u6D59\u6C5F\u7701\u6CA1\u6709 211 \u9662\u6821\u3002\u4E0D\u8FC7\uFF0C\u676D\u5DDE\u7535\u5B50\u79D1\u6280\u5927\u5B66\u867D\u7136\u4E0D\u662F 211\uFF0C\u4F46\u662F\u5B9E\u529B\u5F88\u5F3A\uFF0C\u5916\u754C\u4E5F\u5F88\u8BA4\u53EF\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/hangzhou-17.png" alt=""></p>',66),p=l("\u4F5C\u8005\uFF1A\u5927\u767D\uFF0C\u8F6C\u8F7D\u94FE\u63A5\uFF1A"),d={href:"https://mp.weixin.qq.com/s/hrL2tqXHT5AjOqrQlRhR-w",target:"_blank",rel:"noopener noreferrer"},b=l("https://mp.weixin.qq.com/s/hrL2tqXHT5AjOqrQlRhR-w"),g=i("p",null,[i("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png",alt:""})],-1);function u(m,v){const e=t("ExternalLinkIcon");return r(),o("div",null,[s,i("blockquote",null,[i("p",null,[p,i("a",d,[b,h(e)])])]),g])}var _=a(n,[["render",u],["__file","hangzhou.html.vue"]]);export{_ as default};
diff --git a/dist/assets/hashcode.html.94e85992.js b/dist/assets/hashcode.html.6a0e81d9.js
similarity index 99%
rename from dist/assets/hashcode.html.94e85992.js
rename to dist/assets/hashcode.html.6a0e81d9.js
index 6f279c8c..2e5c7c38 100644
--- a/dist/assets/hashcode.html.94e85992.js
+++ b/dist/assets/hashcode.html.6a0e81d9.js
@@ -1,4 +1,4 @@
-import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e}from"./app.a0271b9c.js";const p={},t=e(`<h1 id="\u6DF1\u5165\u7406\u89E3java\u4E2D\u7684hashcode\u65B9\u6CD5" tabindex="-1"><a class="header-anchor" href="#\u6DF1\u5165\u7406\u89E3java\u4E2D\u7684hashcode\u65B9\u6CD5" aria-hidden="true">#</a> \u6DF1\u5165\u7406\u89E3Java\u4E2D\u7684hashCode\u65B9\u6CD5</h1><p>\u5047\u671F\u7ED3\u675F\u4E86\uFF0C\u9700\u8981\u5FEB\u901F\u5207\u6362\u5230\u5DE5\u4F5C\u7684\u72B6\u6001\u6295\u5165\u5230\u65B0\u7684\u4E00\u5929\u5F53\u4E2D\u3002\u653E\u5047\u7684\u65F6\u5019\u75DB\u5FEB\u5730\u73A9\u800D\uFF0C\u4E0A\u73ED\u7684\u65F6\u5019\u79EF\u6781\u7684\u5DE5\u4F5C\uFF0C\u8FD9\u5E94\u8BE5\u662F\u6211\u4EEC\u5927\u591A\u6570\u201C\u73B0\u4EE3\u4EBA\u201D\u8BE5\u6709\u7684\u751F\u6D3B\u72B6\u6001\u3002</p><p>\u6211\u4E4B\u6240\u4EE5\u8D39\u5C3D\u5FC3\u601D\u94FA\u57AB\u4E86\u524D\u9762\u8FD9\u6BB5\u8BDD\uFF0C\u5C31\u662F\u60F3\u544A\u8BC9\u5927\u5BB6\uFF0C\u6280\u672F\u6587\u867D\u8FDF\u4F46\u5230\uFF0C\u6765\u5427\uFF0C\u5B66\u8D77\u6765~</p><p>\u4ECA\u5929\u6211\u4EEC\u6765\u8C08\u8C08 Java \u4E2D\u7684 <code>hashCode()</code> \u65B9\u6CD5\u3002\u4F17\u6240\u5468\u77E5\uFF0CJava \u662F\u4E00\u95E8\u9762\u5411\u5BF9\u8C61\u7684\u7F16\u7A0B\u8BED\u8A00\uFF0C\u6240\u6709\u7684\u7C7B\u90FD\u4F1A\u9ED8\u8BA4\u7EE7\u627F\u81EA Object \u7C7B\uFF0C\u800C Object \u7684\u4E2D\u6587\u610F\u601D\u5C31\u662F\u201C\u5BF9\u8C61\u201D\u3002</p><p>Object \u7C7B\u4E2D\u5C31\u5305\u542B\u4E86 <code>hashCode()</code> \u65B9\u6CD5\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token annotation punctuation">@HotSpotIntrinsicCandidate</span>
+import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e}from"./app.615e41d8.js";const p={},t=e(`<h1 id="\u6DF1\u5165\u7406\u89E3java\u4E2D\u7684hashcode\u65B9\u6CD5" tabindex="-1"><a class="header-anchor" href="#\u6DF1\u5165\u7406\u89E3java\u4E2D\u7684hashcode\u65B9\u6CD5" aria-hidden="true">#</a> \u6DF1\u5165\u7406\u89E3Java\u4E2D\u7684hashCode\u65B9\u6CD5</h1><p>\u5047\u671F\u7ED3\u675F\u4E86\uFF0C\u9700\u8981\u5FEB\u901F\u5207\u6362\u5230\u5DE5\u4F5C\u7684\u72B6\u6001\u6295\u5165\u5230\u65B0\u7684\u4E00\u5929\u5F53\u4E2D\u3002\u653E\u5047\u7684\u65F6\u5019\u75DB\u5FEB\u5730\u73A9\u800D\uFF0C\u4E0A\u73ED\u7684\u65F6\u5019\u79EF\u6781\u7684\u5DE5\u4F5C\uFF0C\u8FD9\u5E94\u8BE5\u662F\u6211\u4EEC\u5927\u591A\u6570\u201C\u73B0\u4EE3\u4EBA\u201D\u8BE5\u6709\u7684\u751F\u6D3B\u72B6\u6001\u3002</p><p>\u6211\u4E4B\u6240\u4EE5\u8D39\u5C3D\u5FC3\u601D\u94FA\u57AB\u4E86\u524D\u9762\u8FD9\u6BB5\u8BDD\uFF0C\u5C31\u662F\u60F3\u544A\u8BC9\u5927\u5BB6\uFF0C\u6280\u672F\u6587\u867D\u8FDF\u4F46\u5230\uFF0C\u6765\u5427\uFF0C\u5B66\u8D77\u6765~</p><p>\u4ECA\u5929\u6211\u4EEC\u6765\u8C08\u8C08 Java \u4E2D\u7684 <code>hashCode()</code> \u65B9\u6CD5\u3002\u4F17\u6240\u5468\u77E5\uFF0CJava \u662F\u4E00\u95E8\u9762\u5411\u5BF9\u8C61\u7684\u7F16\u7A0B\u8BED\u8A00\uFF0C\u6240\u6709\u7684\u7C7B\u90FD\u4F1A\u9ED8\u8BA4\u7EE7\u627F\u81EA Object \u7C7B\uFF0C\u800C Object \u7684\u4E2D\u6587\u610F\u601D\u5C31\u662F\u201C\u5BF9\u8C61\u201D\u3002</p><p>Object \u7C7B\u4E2D\u5C31\u5305\u542B\u4E86 <code>hashCode()</code> \u65B9\u6CD5\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token annotation punctuation">@HotSpotIntrinsicCandidate</span>
 <span class="token keyword">public</span> <span class="token keyword">native</span> <span class="token keyword">int</span> <span class="token function">hashCode</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><p>\u610F\u5473\u7740\u6240\u6709\u7684\u7C7B\u90FD\u4F1A\u6709\u4E00\u4E2A <code>hashCode()</code> \u65B9\u6CD5\uFF0C\u8BE5\u65B9\u6CD5\u4F1A\u8FD4\u56DE\u4E00\u4E2A int \u7C7B\u578B\u7684\u503C\u3002\u7531\u4E8E <code>hashCode()</code> \u65B9\u6CD5\u662F\u4E00\u4E2A\u672C\u5730\u65B9\u6CD5\uFF08<code>native</code> \u5173\u952E\u5B57\u4FEE\u9970\u7684\u65B9\u6CD5\uFF0C\u7528 <code>C/C++</code> \u8BED\u8A00\u5B9E\u73B0\uFF0C\u7531 Java \u8C03\u7528\uFF09\uFF0C\u610F\u5473\u7740 Object \u7C7B\u4E2D\u5E76\u6CA1\u6709\u7ED9\u51FA\u5177\u4F53\u7684\u5B9E\u73B0\u3002</p><p>\u5177\u4F53\u7684\u5B9E\u73B0\u53EF\u4EE5\u53C2\u8003 <code>jdk/src/hotspot/share/runtime/synchronizer.cpp</code>\uFF08\u6E90\u7801\u53EF\u4EE5\u5230 GitHub \u4E0A OpenJDK \u7684\u4ED3\u5E93\u4E2D\u4E0B\u8F7D\uFF09\u3002<code>get_next_hash()</code> \u65B9\u6CD5\u4F1A\u6839\u636E hashCode \u7684\u53D6\u503C\u6765\u51B3\u5B9A\u91C7\u7528\u54EA\u4E00\u79CD\u54C8\u5E0C\u503C\u7684\u751F\u6210\u7B56\u7565\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/basic-extra-meal/hashcode-1.png" alt=""></p><p>\u5E76\u4E14 <code>hashCode()</code> \u65B9\u6CD5\u88AB <code>@HotSpotIntrinsicCandidate</code> \u6CE8\u89E3\u4FEE\u9970\uFF0C\u8BF4\u660E\u5B83\u5728 HotSpot \u865A\u62DF\u673A\u4E2D\u6709\u4E00\u5957\u9AD8\u6548\u7684\u5B9E\u73B0\uFF0C\u57FA\u4E8E CPU \u6307\u4EE4\u3002</p><p>\u90A3\u5927\u5BB6\u6709\u6CA1\u6709\u60F3\u8FC7\u8FD9\u6837\u4E00\u4E2A\u95EE\u9898\uFF1A\u4E3A\u4EC0\u4E48 Object \u7C7B\u9700\u8981\u4E00\u4E2A <code>hashCode()</code> \u65B9\u6CD5\u5462\uFF1F</p><p>\u5728 Java \u4E2D\uFF0C<code>hashCode()</code> \u65B9\u6CD5\u7684\u4E3B\u8981\u4F5C\u7528\u5C31\u662F\u4E3A\u4E86\u914D\u5408\u54C8\u5E0C\u8868\u4F7F\u7528\u7684\u3002</p><p>\u54C8\u5E0C\u8868\uFF08Hash Table\uFF09\uFF0C\u4E5F\u53EB\u6563\u5217\u8868\uFF0C\u662F\u4E00\u79CD\u53EF\u4EE5\u901A\u8FC7\u5173\u952E\u7801\u503C\uFF08key-value\uFF09\u76F4\u63A5\u8BBF\u95EE\u7684\u6570\u636E\u7ED3\u6784\uFF0C\u5B83\u6700\u5927\u7684\u7279\u70B9\u5C31\u662F\u53EF\u4EE5\u5FEB\u901F\u5B9E\u73B0\u67E5\u627E\u3001\u63D2\u5165\u548C\u5220\u9664\u3002\u5176\u4E2D\u7528\u5230\u7684\u7B97\u6CD5\u53EB\u505A\u54C8\u5E0C\uFF0C\u5C31\u662F\u628A\u4EFB\u610F\u957F\u5EA6\u7684\u8F93\u5165\uFF0C\u53D8\u6362\u6210\u56FA\u5B9A\u957F\u5EA6\u7684\u8F93\u51FA\uFF0C\u8BE5\u8F93\u51FA\u5C31\u662F\u54C8\u5E0C\u503C\u3002\u50CF MD5\u3001SHA1 \u90FD\u7528\u7684\u662F\u54C8\u5E0C\u7B97\u6CD5\u3002</p><p>\u50CF Java \u4E2D\u7684 HashSet\u3001Hashtable\uFF08\u6CE8\u610F\u662F\u5C0F\u5199\u7684 t\uFF09\u3001HashMap \u90FD\u662F\u57FA\u4E8E\u54C8\u5E0C\u8868\u7684\u5177\u4F53\u5B9E\u73B0\u3002\u5176\u4E2D\u7684 HashMap \u5C31\u662F\u6700\u5178\u578B\u7684\u4EE3\u8868\uFF0C\u4E0D\u4EC5\u9762\u8BD5\u5B98\u7ECF\u5E38\u95EE\uFF0C\u5DE5\u4F5C\u4E2D\u7684\u4F7F\u7528\u9891\u7387\u4E5F\u975E\u5E38\u7684\u9AD8\u3002</p><p>\u5927\u5BB6\u60F3\u4E00\u4E0B\uFF0C\u5982\u679C\u6CA1\u6709\u54C8\u5E0C\u8868\uFF0C\u4F46\u53C8\u9700\u8981\u8FD9\u6837\u4E00\u4E2A\u6570\u636E\u7ED3\u6784\uFF0C\u5B83\u91CC\u9762\u5B58\u653E\u7684\u6570\u636E\u662F\u4E0D\u5141\u8BB8\u91CD\u590D\u7684\uFF0C\u8BE5\u600E\u4E48\u529E\u5462\uFF1F</p><p>\u8981\u4E0D\u4F7F\u7528 <code>equals()</code> \u65B9\u6CD5\u8FDB\u884C\u9010\u4E2A\u6BD4\u8F83\uFF1F\u8FD9\u79CD\u65B9\u6848\u5F53\u7136\u662F\u53EF\u884C\u7684\u3002\u4F46\u5982\u679C\u6570\u636E\u91CF\u7279\u522B\u7279\u522B\u5927\uFF0C\u91C7\u7528 <code>equals()</code> \u65B9\u6CD5\u8FDB\u884C\u9010\u4E2A\u5BF9\u6BD4\u7684\u6548\u7387\u80AF\u5B9A\u5F88\u4F4E\u5F88\u4F4E\uFF0C\u6700\u597D\u7684\u89E3\u51B3\u65B9\u6848\u5C31\u662F\u54C8\u5E0C\u8868\u3002</p><p>\u62FF HashMap \u6765\u8BF4\u5427\u3002\u5F53\u6211\u4EEC\u8981\u5728\u5B83\u91CC\u9762\u6DFB\u52A0\u5BF9\u8C61\u65F6\uFF0C\u5148\u8C03\u7528\u8FD9\u4E2A\u5BF9\u8C61\u7684 <code>hashCode()</code> \u65B9\u6CD5\uFF0C\u5F97\u5230\u5BF9\u5E94\u7684\u54C8\u5E0C\u503C\uFF0C\u7136\u540E\u5C06\u54C8\u5E0C\u503C\u548C\u5BF9\u8C61\u4E00\u8D77\u653E\u5230 HashMap \u4E2D\u3002\u5F53\u6211\u4EEC\u8981\u518D\u6DFB\u52A0\u4E00\u4E2A\u65B0\u7684\u5BF9\u8C61\u65F6\uFF1A</p><ul><li>\u83B7\u53D6\u5BF9\u8C61\u7684\u54C8\u5E0C\u503C\uFF1B</li><li>\u548C\u4E4B\u524D\u5DF2\u7ECF\u5B58\u5728\u7684\u54C8\u5E0C\u503C\u8FDB\u884C\u6BD4\u8F83\uFF0C\u5982\u679C\u4E0D\u76F8\u7B49\uFF0C\u76F4\u63A5\u5B58\u8FDB\u53BB\uFF1B</li><li>\u5982\u679C\u6709\u76F8\u7B49\u7684\uFF0C\u518D\u8C03\u7528 <code>equals()</code> \u65B9\u6CD5\u8FDB\u884C\u5BF9\u8C61\u4E4B\u95F4\u7684\u6BD4\u8F83\uFF0C\u5982\u679C\u76F8\u7B49\uFF0C\u4E0D\u5B58\u4E86\uFF1B</li><li>\u5982\u679C\u4E0D\u7B49\uFF0C\u8BF4\u660E\u54C8\u5E0C\u51B2\u7A81\u4E86\uFF0C\u589E\u52A0\u4E00\u4E2A\u94FE\u8868\uFF0C\u5B58\u653E\u65B0\u7684\u5BF9\u8C61\uFF1B</li><li>\u5982\u679C\u94FE\u8868\u7684\u957F\u5EA6\u5927\u4E8E 8\uFF0C\u8F6C\u4E3A\u7EA2\u9ED1\u6811\u6765\u5904\u7406\u3002</li></ul><p>\u5C31\u8FD9\u4E48\u4E00\u5957\u4E0B\u6765\uFF0C\u8C03\u7528 <code>equals()</code> \u65B9\u6CD5\u7684\u9891\u7387\u5C31\u5927\u5927\u964D\u4F4E\u4E86\u3002\u4E5F\u5C31\u662F\u8BF4\uFF0C\u53EA\u8981\u54C8\u5E0C\u7B97\u6CD5\u8DB3\u591F\u7684\u9AD8\u6548\uFF0C\u628A\u53D1\u751F\u54C8\u5E0C\u51B2\u7A81\u7684\u9891\u7387\u964D\u5230\u6700\u4F4E\uFF0C\u54C8\u5E0C\u8868\u7684\u6548\u7387\u5C31\u7279\u522B\u7684\u9AD8\u3002</p><p>\u6765\u770B\u4E00\u4E0B HashMap \u7684\u54C8\u5E0C\u7B97\u6CD5\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">static</span> <span class="token keyword">final</span> <span class="token keyword">int</span> <span class="token function">hash</span><span class="token punctuation">(</span><span class="token class-name">Object</span> key<span class="token punctuation">)</span> <span class="token punctuation">{</span>
     <span class="token keyword">int</span> h<span class="token punctuation">;</span>
diff --git a/dist/assets/hashmap-interview.html.2609e519.js b/dist/assets/hashmap-interview.html.36f118fd.js
similarity index 99%
rename from dist/assets/hashmap-interview.html.2609e519.js
rename to dist/assets/hashmap-interview.html.36f118fd.js
index c93d1afb..de01f0a2 100644
--- a/dist/assets/hashmap-interview.html.2609e519.js
+++ b/dist/assets/hashmap-interview.html.36f118fd.js
@@ -1,4 +1,4 @@
-import{_ as p}from"./plugin-vue_export-helper.21dcd24c.js";import{r as o,o as i,c as l,a,b as e,e as t,d as n}from"./app.a0271b9c.js";const r={},c=t(`<h1 id="java-hashmap\u7CBE\u9009\u9762\u8BD5\u9898" tabindex="-1"><a class="header-anchor" href="#java-hashmap\u7CBE\u9009\u9762\u8BD5\u9898" aria-hidden="true">#</a> Java HashMap\u7CBE\u9009\u9762\u8BD5\u9898</h1><p>\u5BF9\u4E8E Java \u6C42\u804C\u8005\u6765\u8BF4\uFF0CHashMap \u53EF\u8C13\u662F\u91CD\u4E2D\u4E4B\u91CD\uFF0C\u662F\u9762\u8BD5\u7684\u5FC5\u8003\u70B9\u3002\u7136\u800C HashMap \u7684\u77E5\u8BC6\u70B9\u975E\u5E38\u591A\uFF0C\u590D\u4E60\u8D77\u6765\u82B1\u8D39\u7CBE\u529B\u5F88\u5927\u3002</p><h3 id="_01\u3001hashmap\u7684\u5E95\u5C42\u6570\u636E\u7ED3\u6784\u662F\u4EC0\u4E48" tabindex="-1"><a class="header-anchor" href="#_01\u3001hashmap\u7684\u5E95\u5C42\u6570\u636E\u7ED3\u6784\u662F\u4EC0\u4E48" aria-hidden="true">#</a> 01\u3001HashMap\u7684\u5E95\u5C42\u6570\u636E\u7ED3\u6784\u662F\u4EC0\u4E48\uFF1F</h3><p>JDK 7 \u4E2D\uFF0CHashMap \u7531\u201C\u6570\u7EC4+\u94FE\u8868\u201D\u7EC4\u6210\uFF0C\u6570\u7EC4\u662F HashMap \u7684\u4E3B\u4F53\uFF0C\u94FE\u8868\u5219\u662F\u4E3B\u8981\u4E3A\u4E86\u89E3\u51B3\u54C8\u5E0C\u51B2\u7A81\u800C\u5B58\u5728\u7684\u3002</p><p>\u5728 JDK 8 \u4E2D\uFF0CHashMap \u7531\u201C\u6570\u7EC4+\u94FE\u8868+\u7EA2\u9ED1\u6811\u201D\u7EC4\u6210\u3002\u94FE\u8868\u8FC7\u957F\uFF0C\u4F1A\u4E25\u91CD\u5F71\u54CD HashMap \u7684\u6027\u80FD\uFF0C\u800C\u7EA2\u9ED1\u6811\u641C\u7D22\u7684\u65F6\u95F4\u590D\u6742\u5EA6\u662F O(logn)\uFF0C\u800C\u94FE\u8868\u662F\u7CDF\u7CD5\u7684 O(n)\u3002\u56E0\u6B64\uFF0CJDK 8 \u5BF9\u6570\u636E\u7ED3\u6784\u505A\u4E86\u8FDB\u4E00\u6B65\u7684\u4F18\u5316\uFF0C\u5F15\u5165\u4E86\u7EA2\u9ED1\u6811\uFF0C\u94FE\u8868\u548C\u7EA2\u9ED1\u6811\u5728\u8FBE\u5230\u4E00\u5B9A\u6761\u4EF6\u4F1A\u8FDB\u884C\u8F6C\u6362\uFF1A</p><ul><li>\u5F53\u94FE\u8868\u8D85\u8FC7 8 \u4E14\u6570\u636E\u603B\u91CF\u8D85\u8FC7 64 \u65F6\u4F1A\u8F6C\u7EA2\u9ED1\u6811\u3002</li><li>\u5C06\u94FE\u8868\u8F6C\u6362\u6210\u7EA2\u9ED1\u6811\u524D\u4F1A\u5224\u65AD\uFF0C\u5982\u679C\u5F53\u524D\u6570\u7EC4\u7684\u957F\u5EA6\u5C0F\u4E8E 64\uFF0C\u90A3\u4E48\u4F1A\u9009\u62E9\u5148\u8FDB\u884C\u6570\u7EC4\u6269\u5BB9\uFF0C\u800C\u4E0D\u662F\u8F6C\u6362\u4E3A\u7EA2\u9ED1\u6811\uFF0C\u4EE5\u51CF\u5C11\u641C\u7D22\u65F6\u95F4\u3002</li></ul><p>\u94FE\u8868\u957F\u5EA6\u8D85\u8FC7 8 \u4F53\u73B0\u5728 putVal \u65B9\u6CD5\u4E2D\u7684\u8FD9\u6BB5\u4EE3\u7801\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token comment">//\u94FE\u8868\u957F\u5EA6\u5927\u4E8E8\u8F6C\u6362\u4E3A\u7EA2\u9ED1\u6811\u8FDB\u884C\u5904\u7406</span>
+import{_ as p}from"./plugin-vue_export-helper.21dcd24c.js";import{r as o,o as i,c as l,a,b as e,e as t,d as n}from"./app.615e41d8.js";const r={},c=t(`<h1 id="java-hashmap\u7CBE\u9009\u9762\u8BD5\u9898" tabindex="-1"><a class="header-anchor" href="#java-hashmap\u7CBE\u9009\u9762\u8BD5\u9898" aria-hidden="true">#</a> Java HashMap\u7CBE\u9009\u9762\u8BD5\u9898</h1><p>\u5BF9\u4E8E Java \u6C42\u804C\u8005\u6765\u8BF4\uFF0CHashMap \u53EF\u8C13\u662F\u91CD\u4E2D\u4E4B\u91CD\uFF0C\u662F\u9762\u8BD5\u7684\u5FC5\u8003\u70B9\u3002\u7136\u800C HashMap \u7684\u77E5\u8BC6\u70B9\u975E\u5E38\u591A\uFF0C\u590D\u4E60\u8D77\u6765\u82B1\u8D39\u7CBE\u529B\u5F88\u5927\u3002</p><h3 id="_01\u3001hashmap\u7684\u5E95\u5C42\u6570\u636E\u7ED3\u6784\u662F\u4EC0\u4E48" tabindex="-1"><a class="header-anchor" href="#_01\u3001hashmap\u7684\u5E95\u5C42\u6570\u636E\u7ED3\u6784\u662F\u4EC0\u4E48" aria-hidden="true">#</a> 01\u3001HashMap\u7684\u5E95\u5C42\u6570\u636E\u7ED3\u6784\u662F\u4EC0\u4E48\uFF1F</h3><p>JDK 7 \u4E2D\uFF0CHashMap \u7531\u201C\u6570\u7EC4+\u94FE\u8868\u201D\u7EC4\u6210\uFF0C\u6570\u7EC4\u662F HashMap \u7684\u4E3B\u4F53\uFF0C\u94FE\u8868\u5219\u662F\u4E3B\u8981\u4E3A\u4E86\u89E3\u51B3\u54C8\u5E0C\u51B2\u7A81\u800C\u5B58\u5728\u7684\u3002</p><p>\u5728 JDK 8 \u4E2D\uFF0CHashMap \u7531\u201C\u6570\u7EC4+\u94FE\u8868+\u7EA2\u9ED1\u6811\u201D\u7EC4\u6210\u3002\u94FE\u8868\u8FC7\u957F\uFF0C\u4F1A\u4E25\u91CD\u5F71\u54CD HashMap \u7684\u6027\u80FD\uFF0C\u800C\u7EA2\u9ED1\u6811\u641C\u7D22\u7684\u65F6\u95F4\u590D\u6742\u5EA6\u662F O(logn)\uFF0C\u800C\u94FE\u8868\u662F\u7CDF\u7CD5\u7684 O(n)\u3002\u56E0\u6B64\uFF0CJDK 8 \u5BF9\u6570\u636E\u7ED3\u6784\u505A\u4E86\u8FDB\u4E00\u6B65\u7684\u4F18\u5316\uFF0C\u5F15\u5165\u4E86\u7EA2\u9ED1\u6811\uFF0C\u94FE\u8868\u548C\u7EA2\u9ED1\u6811\u5728\u8FBE\u5230\u4E00\u5B9A\u6761\u4EF6\u4F1A\u8FDB\u884C\u8F6C\u6362\uFF1A</p><ul><li>\u5F53\u94FE\u8868\u8D85\u8FC7 8 \u4E14\u6570\u636E\u603B\u91CF\u8D85\u8FC7 64 \u65F6\u4F1A\u8F6C\u7EA2\u9ED1\u6811\u3002</li><li>\u5C06\u94FE\u8868\u8F6C\u6362\u6210\u7EA2\u9ED1\u6811\u524D\u4F1A\u5224\u65AD\uFF0C\u5982\u679C\u5F53\u524D\u6570\u7EC4\u7684\u957F\u5EA6\u5C0F\u4E8E 64\uFF0C\u90A3\u4E48\u4F1A\u9009\u62E9\u5148\u8FDB\u884C\u6570\u7EC4\u6269\u5BB9\uFF0C\u800C\u4E0D\u662F\u8F6C\u6362\u4E3A\u7EA2\u9ED1\u6811\uFF0C\u4EE5\u51CF\u5C11\u641C\u7D22\u65F6\u95F4\u3002</li></ul><p>\u94FE\u8868\u957F\u5EA6\u8D85\u8FC7 8 \u4F53\u73B0\u5728 putVal \u65B9\u6CD5\u4E2D\u7684\u8FD9\u6BB5\u4EE3\u7801\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token comment">//\u94FE\u8868\u957F\u5EA6\u5927\u4E8E8\u8F6C\u6362\u4E3A\u7EA2\u9ED1\u6811\u8FDB\u884C\u5904\u7406</span>
 <span class="token keyword">if</span> <span class="token punctuation">(</span>binCount <span class="token operator">&gt;=</span> TREEIFY_THRESHOLD <span class="token operator">-</span> <span class="token number">1</span><span class="token punctuation">)</span> <span class="token comment">// -1 for 1st</span>
     <span class="token function">treeifyBin</span><span class="token punctuation">(</span>tab<span class="token punctuation">,</span> hash<span class="token punctuation">)</span><span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>table \u957F\u5EA6\u4E3A 64 \u4F53\u73B0\u5728 treeifyBin \u65B9\u6CD5\u4E2D\u7684\u8FD9\u6BB5\u4EE3\u7801\uFF1A\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">final</span> <span class="token keyword">void</span> <span class="token function">treeifyBin</span><span class="token punctuation">(</span><span class="token class-name">Node</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">K</span><span class="token punctuation">,</span><span class="token class-name">V</span><span class="token punctuation">&gt;</span></span><span class="token punctuation">[</span><span class="token punctuation">]</span> tab<span class="token punctuation">,</span> <span class="token keyword">int</span> hash<span class="token punctuation">)</span> <span class="token punctuation">{</span>
diff --git a/dist/assets/hashmap.html.cd5a497b.js b/dist/assets/hashmap.html.e3590cbb.js
similarity index 99%
rename from dist/assets/hashmap.html.cd5a497b.js
rename to dist/assets/hashmap.html.e3590cbb.js
index a2e9d978..91d65c46 100644
--- a/dist/assets/hashmap.html.cd5a497b.js
+++ b/dist/assets/hashmap.html.e3590cbb.js
@@ -1,4 +1,4 @@
-import{_ as e}from"./plugin-vue_export-helper.21dcd24c.js";import{r as o,o as c,c as l,a as s,b as t,e as a,d as n}from"./app.a0271b9c.js";const i={},u=a(`<h1 id="java8\u7CFB\u5217\u4E4B\u91CD\u65B0\u8BA4\u8BC6hashmap" tabindex="-1"><a class="header-anchor" href="#java8\u7CFB\u5217\u4E4B\u91CD\u65B0\u8BA4\u8BC6hashmap" aria-hidden="true">#</a> Java8\u7CFB\u5217\u4E4B\u91CD\u65B0\u8BA4\u8BC6HashMap</h1><h2 id="\u4E00\u3001hash-\u65B9\u6CD5\u7684\u539F\u7406" tabindex="-1"><a class="header-anchor" href="#\u4E00\u3001hash-\u65B9\u6CD5\u7684\u539F\u7406" aria-hidden="true">#</a> \u4E00\u3001hash \u65B9\u6CD5\u7684\u539F\u7406</h2><p>\u6765\u770B\u4E00\u4E0B hash \u65B9\u6CD5\u7684\u6E90\u7801\uFF08JDK 8 \u4E2D\u7684 HashMap\uFF09\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">static</span> <span class="token keyword">final</span> <span class="token keyword">int</span> <span class="token function">hash</span><span class="token punctuation">(</span><span class="token class-name">Object</span> key<span class="token punctuation">)</span> <span class="token punctuation">{</span>
+import{_ as e}from"./plugin-vue_export-helper.21dcd24c.js";import{r as o,o as c,c as l,a as s,b as t,e as a,d as n}from"./app.615e41d8.js";const i={},u=a(`<h1 id="java8\u7CFB\u5217\u4E4B\u91CD\u65B0\u8BA4\u8BC6hashmap" tabindex="-1"><a class="header-anchor" href="#java8\u7CFB\u5217\u4E4B\u91CD\u65B0\u8BA4\u8BC6hashmap" aria-hidden="true">#</a> Java8\u7CFB\u5217\u4E4B\u91CD\u65B0\u8BA4\u8BC6HashMap</h1><h2 id="\u4E00\u3001hash-\u65B9\u6CD5\u7684\u539F\u7406" tabindex="-1"><a class="header-anchor" href="#\u4E00\u3001hash-\u65B9\u6CD5\u7684\u539F\u7406" aria-hidden="true">#</a> \u4E00\u3001hash \u65B9\u6CD5\u7684\u539F\u7406</h2><p>\u6765\u770B\u4E00\u4E0B hash \u65B9\u6CD5\u7684\u6E90\u7801\uFF08JDK 8 \u4E2D\u7684 HashMap\uFF09\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">static</span> <span class="token keyword">final</span> <span class="token keyword">int</span> <span class="token function">hash</span><span class="token punctuation">(</span><span class="token class-name">Object</span> key<span class="token punctuation">)</span> <span class="token punctuation">{</span>
     <span class="token keyword">int</span> h<span class="token punctuation">;</span>
     <span class="token keyword">return</span> <span class="token punctuation">(</span>key <span class="token operator">==</span> <span class="token keyword">null</span><span class="token punctuation">)</span> <span class="token operator">?</span> <span class="token number">0</span> <span class="token operator">:</span> <span class="token punctuation">(</span>h <span class="token operator">=</span> key<span class="token punctuation">.</span><span class="token function">hashCode</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token operator">^</span> <span class="token punctuation">(</span>h <span class="token operator">&gt;&gt;&gt;</span> <span class="token number">16</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 <span class="token punctuation">}</span>
diff --git a/dist/assets/hello-world.html.504deafe.js b/dist/assets/hello-world.html.26946542.js
similarity index 99%
rename from dist/assets/hello-world.html.504deafe.js
rename to dist/assets/hello-world.html.26946542.js
index 8921f885..c60db363 100644
--- a/dist/assets/hello-world.html.504deafe.js
+++ b/dist/assets/hello-world.html.26946542.js
@@ -1,4 +1,4 @@
-import{_ as s}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o,c as r,a as e,b as i,e as t,d as a}from"./app.a0271b9c.js";const l={},c=t('<h1 id="\u7B2C\u4E00\u4E2Ajava\u7A0B\u5E8F-hello-world" tabindex="-1"><a class="header-anchor" href="#\u7B2C\u4E00\u4E2Ajava\u7A0B\u5E8F-hello-world" aria-hidden="true">#</a> \u7B2C\u4E00\u4E2AJava\u7A0B\u5E8F\uFF1AHello World</h1><h2 id="\u4E00\u3001\u5B89\u88C5\u96C6\u6210\u5F00\u53D1\u73AF\u5883intellij-idea" tabindex="-1"><a class="header-anchor" href="#\u4E00\u3001\u5B89\u88C5\u96C6\u6210\u5F00\u53D1\u73AF\u5883intellij-idea" aria-hidden="true">#</a> \u4E00\u3001\u5B89\u88C5\u96C6\u6210\u5F00\u53D1\u73AF\u5883Intellij IDEA</h2><p>IntelliJ IDEA \u7B80\u79F0 IDEA\uFF0C\u662F\u4E1A\u754C\u516C\u8BA4\u4E3A\u6700\u597D\u7684 Java \u96C6\u6210\u5F00\u53D1\u5DE5\u5177\uFF0C\u5C24\u5176\u662F\u5728\u4EE3\u7801\u81EA\u52A8\u63D0\u793A\u3001\u4EE3\u7801\u91CD\u6784\u3001\u4EE3\u7801\u7248\u672C\u7BA1\u7406\u3001\u5355\u5143\u6D4B\u8BD5\u3001\u4EE3\u7801\u5206\u6790\u7B49\u65B9\u9762\u6709\u7740\u4EAE\u773C\u7684\u53D1\u6325\u3002</p><p>IDEA \u4EA7\u4E8E\u6377\u514B\uFF0C\u5F00\u53D1\u4EBA\u5458\u4EE5\u4E25\u8C28\u8457\u79F0\u7684\u4E1C\u6B27\u7A0B\u5E8F\u5458\u4E3A\u4E3B\uFF0C\u5206\u4E3A\u793E\u533A\u7248\u548C\u4ED8\u8D39\u7248\u4E24\u4E2A\u7248\u672C\u3002\u6211\u4EEC\u5728\u5B66\u4E60\u9636\u6BB5\uFF0C\u793E\u533A\u7248\u5C31\u8DB3\u591F\u7528\u4E86\u3002</p><p>\u56DE\u60F3\u8D77\u6211\u6700\u521D\u5B66 Java \u7684\u65F6\u5019\uFF0C\u8001\u5E08\u8981\u6C42\u6211\u4EEC\u5728\u8BB0\u4E8B\u672C\u4E0A\u6572\u4EE3\u7801\uFF0C\u5728\u547D\u4EE4\u884C\u4E2D\u7F16\u8BD1\u548C\u6267\u884C Java \u4EE3\u7801\uFF0C\u641E\u5F97\u5168\u73ED\u4E09\u5206\u4E4B\u4E8C\u7684\u540C\u5B66\u90FD\u505A\u597D\u4E86\u653E\u5F03\u5B66\u4E60 Java \u7684\u6253\u7B97\u3002</p><p>\u9274\u4E8E\u6B64\uFF0C\u6211\u5F3A\u70C8\u63A8\u8350\u5927\u5BB6\u4F7F\u7528\u96C6\u6210\u5F00\u53D1\u5DE5\u5177\uFF0C\u6BD4\u5982\u8BF4 IntelliJ IDEA \u6765\u5B66\u4E60\u3002</p><p>IDEA \u5206\u4E3A\u793E\u533A\u7248\u548C\u4ED8\u8D39\u7248\u4E24\u4E2A\u7248\u672C\u3002</p><h3 id="_01\u3001\u4E0B\u8F7D-idea" tabindex="-1"><a class="header-anchor" href="#_01\u3001\u4E0B\u8F7D-idea" aria-hidden="true">#</a> 01\u3001\u4E0B\u8F7D IDEA</h3>',8),d=a("IntelliJ IDEA \u7684\u5B98\u65B9\u4E0B\u8F7D\u5730\u5740\u4E3A\uFF1A"),v={href:"https://www.jetbrains.com/idea/download",target:"_blank",rel:"noopener noreferrer"},g=a("https://www.jetbrains.com/idea/download/"),m=t(`<p><img src="https://cdn.jsdelivr.net/gh/itwanger/itwanger.github.io/assets/images/2019/11/java-idea-community-1.png" alt=""></p><p>UItimate \u4E3A\u4ED8\u8D39\u7248\uFF0C\u53EF\u4EE5\u514D\u8D39\u8BD5\u7528\uFF0C\u4E3B\u8981\u9488\u5BF9\u7684\u662F Web \u548C\u4F01\u4E1A\u5F00\u53D1\u7528\u6237\uFF1BCommunity \u4E3A\u514D\u8D39\u7248\uFF0C\u53EF\u4EE5\u514D\u8D39\u4F7F\u7528\uFF0C\u4E3B\u8981\u9488\u5BF9\u7684\u662F Java \u521D\u5B66\u8005\u548C\u5B89\u5353\u5F00\u53D1\u7528\u6237\u3002</p><p>\u529F\u80FD\u4E0A\u7684\u5DEE\u522B\u5982\u4E0B\u56FE\u6240\u793A\u3002</p><p><img src="https://cdn.jsdelivr.net/gh/itwanger/itwanger.github.io/assets/images/2019/11/java-idea-community-2.png" alt=""></p><p>\u672C\u7BC7\u6559\u7A0B\u4E3B\u8981\u9488\u5BF9\u7684\u662F Java \u521D\u5B66\u8005\uFF0C\u6240\u4EE5\u9009\u62E9\u514D\u8D39\u7248\u4E3A\u4F8B\uFF0C\u70B9\u51FB\u300CDownload\u300D\u8FDB\u884C\u4E0B\u8F7D\u3002</p><p>\u7A0D\u7B49\u4E00\u5206\u949F\u65F6\u95F4\uFF0C\u5927\u6982 580M\u3002</p><h3 id="_02\u3001\u5B89\u88C5-idea" tabindex="-1"><a class="header-anchor" href="#_02\u3001\u5B89\u88C5-idea" aria-hidden="true">#</a> 02\u3001\u5B89\u88C5 IDEA</h3><p>\u53CC\u51FB\u8FD0\u884C IDEA \u5B89\u88C5\u7A0B\u5E8F\uFF0C\u4E00\u6B65\u6B65\u50BB\u74DC\u5F0F\u7684\u4E0B\u4E00\u6B65\u5C31\u884C\u4E86\u3002</p><p><img src="https://cdn.jsdelivr.net/gh/itwanger/itwanger.github.io/assets/images/2019/11/java-idea-community-3.png" alt=""></p><p><img src="https://cdn.jsdelivr.net/gh/itwanger/itwanger.github.io/assets/images/2019/11/java-idea-community-4.png" alt=""></p><p><img src="https://cdn.jsdelivr.net/gh/itwanger/itwanger.github.io/assets/images/2019/11/java-idea-community-5.png" alt=""></p><p>\u4E3A\u4E86\u65B9\u4FBF\u542F\u52A8 IDEA\uFF0C\u53EF\u4EE5\u52FE\u9009\u301064-bit launcher\u3011\u590D\u9009\u6846\u3002\u4E3A\u4E86\u5173\u8054 Java \u6E90\u6587\u4EF6\uFF0C\u53EF\u4EE5\u52FE\u9009\u3010.java\u3011\u590D\u9009\u6846\u3002</p><p><img src="https://cdn.jsdelivr.net/gh/itwanger/itwanger.github.io/assets/images/2019/11/java-idea-community-6.png" alt=""></p><p>\u70B9\u51FB\u3010Install\u3011\u540E\uFF0C\u9700\u8981\u9759\u9759\u5730\u7B49\u5F85\u4E00\u4F1A\uFF0C\u5927\u6982\u4E00\u5206\u949F\u7684\u65F6\u95F4\uFF0C\u8D81\u673A\u4F11\u606F\u4E00\u4E0B\u773C\u775B\u3002</p><p><img src="https://cdn.jsdelivr.net/gh/itwanger/itwanger.github.io/assets/images/2019/11/java-idea-community-7.png" alt=""></p><p>\u5B89\u88C5\u5B8C\u6210\u540E\u7684\u754C\u9762\u5982\u4E0B\u56FE\u6240\u793A\u3002</p><p><img src="https://cdn.jsdelivr.net/gh/itwanger/itwanger.github.io/assets/images/2019/11/java-idea-community-8.png" alt=""></p><h3 id="_03\u3001\u542F\u52A8-idea" tabindex="-1"><a class="header-anchor" href="#_03\u3001\u542F\u52A8-idea" aria-hidden="true">#</a> 03\u3001\u542F\u52A8 IDEA</h3><p>\u56DE\u5230\u684C\u9762\uFF0C\u53CC\u51FB\u8FD0\u884C IDEA \u7684\u5FEB\u6377\u65B9\u5F0F\uFF0C\u542F\u52A8 IDEA\u3002</p><p><img src="https://cdn.jsdelivr.net/gh/itwanger/itwanger.github.io/assets/images/2019/11/java-idea-community-9.png" alt=""></p><p>\u5047\u88C5\u9605\u8BFB\u5B8C\u6761\u6B3E\u540E\uFF0C\u52FE\u9009\u540C\u610F\u590D\u9009\u6846\uFF0C\u70B9\u51FB\u3010Continue\u3011</p><p><img src="https://cdn.jsdelivr.net/gh/itwanger/itwanger.github.io/assets/images/2019/11/java-idea-community-10.png" alt=""></p><p>\u5982\u679C\u60F3\u8981\u5E2E\u52A9 IDEA \u6536\u96C6\u6539\u8FDB\u4FE1\u606F\uFF0C\u53EF\u4EE5\u70B9\u51FB\u3010Send Usage Statistics\u3011\uFF1B\u5426\u5219\u70B9\u51FB\u3010Don&#39;t send\u3011\u3002</p><p><img src="https://cdn.jsdelivr.net/gh/itwanger/itwanger.github.io/assets/images/2019/11/java-idea-community-11.png" alt=""></p><p>\u5230\u6B64\uFF0CIntellij IDEA \u7684\u5B89\u88C5\u5C31\u5B8C\u6210\u4E86\uFF0C\u5F88\u7B80\u5355\u3002</p><h2 id="\u4E8C\u3001hello-world" tabindex="-1"><a class="header-anchor" href="#\u4E8C\u3001hello-world" aria-hidden="true">#</a> \u4E8C\u3001Hello World</h2><p>\u7B2C\u4E00\u4E2A Java \u7A0B\u5E8F\u975E\u5E38\u7B80\u5355\uFF0C\u4EE3\u7801\u5982\u4E0B\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token doc-comment comment">/**
+import{_ as s}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o,c as r,a as e,b as i,e as t,d as a}from"./app.615e41d8.js";const l={},c=t('<h1 id="\u7B2C\u4E00\u4E2Ajava\u7A0B\u5E8F-hello-world" tabindex="-1"><a class="header-anchor" href="#\u7B2C\u4E00\u4E2Ajava\u7A0B\u5E8F-hello-world" aria-hidden="true">#</a> \u7B2C\u4E00\u4E2AJava\u7A0B\u5E8F\uFF1AHello World</h1><h2 id="\u4E00\u3001\u5B89\u88C5\u96C6\u6210\u5F00\u53D1\u73AF\u5883intellij-idea" tabindex="-1"><a class="header-anchor" href="#\u4E00\u3001\u5B89\u88C5\u96C6\u6210\u5F00\u53D1\u73AF\u5883intellij-idea" aria-hidden="true">#</a> \u4E00\u3001\u5B89\u88C5\u96C6\u6210\u5F00\u53D1\u73AF\u5883Intellij IDEA</h2><p>IntelliJ IDEA \u7B80\u79F0 IDEA\uFF0C\u662F\u4E1A\u754C\u516C\u8BA4\u4E3A\u6700\u597D\u7684 Java \u96C6\u6210\u5F00\u53D1\u5DE5\u5177\uFF0C\u5C24\u5176\u662F\u5728\u4EE3\u7801\u81EA\u52A8\u63D0\u793A\u3001\u4EE3\u7801\u91CD\u6784\u3001\u4EE3\u7801\u7248\u672C\u7BA1\u7406\u3001\u5355\u5143\u6D4B\u8BD5\u3001\u4EE3\u7801\u5206\u6790\u7B49\u65B9\u9762\u6709\u7740\u4EAE\u773C\u7684\u53D1\u6325\u3002</p><p>IDEA \u4EA7\u4E8E\u6377\u514B\uFF0C\u5F00\u53D1\u4EBA\u5458\u4EE5\u4E25\u8C28\u8457\u79F0\u7684\u4E1C\u6B27\u7A0B\u5E8F\u5458\u4E3A\u4E3B\uFF0C\u5206\u4E3A\u793E\u533A\u7248\u548C\u4ED8\u8D39\u7248\u4E24\u4E2A\u7248\u672C\u3002\u6211\u4EEC\u5728\u5B66\u4E60\u9636\u6BB5\uFF0C\u793E\u533A\u7248\u5C31\u8DB3\u591F\u7528\u4E86\u3002</p><p>\u56DE\u60F3\u8D77\u6211\u6700\u521D\u5B66 Java \u7684\u65F6\u5019\uFF0C\u8001\u5E08\u8981\u6C42\u6211\u4EEC\u5728\u8BB0\u4E8B\u672C\u4E0A\u6572\u4EE3\u7801\uFF0C\u5728\u547D\u4EE4\u884C\u4E2D\u7F16\u8BD1\u548C\u6267\u884C Java \u4EE3\u7801\uFF0C\u641E\u5F97\u5168\u73ED\u4E09\u5206\u4E4B\u4E8C\u7684\u540C\u5B66\u90FD\u505A\u597D\u4E86\u653E\u5F03\u5B66\u4E60 Java \u7684\u6253\u7B97\u3002</p><p>\u9274\u4E8E\u6B64\uFF0C\u6211\u5F3A\u70C8\u63A8\u8350\u5927\u5BB6\u4F7F\u7528\u96C6\u6210\u5F00\u53D1\u5DE5\u5177\uFF0C\u6BD4\u5982\u8BF4 IntelliJ IDEA \u6765\u5B66\u4E60\u3002</p><p>IDEA \u5206\u4E3A\u793E\u533A\u7248\u548C\u4ED8\u8D39\u7248\u4E24\u4E2A\u7248\u672C\u3002</p><h3 id="_01\u3001\u4E0B\u8F7D-idea" tabindex="-1"><a class="header-anchor" href="#_01\u3001\u4E0B\u8F7D-idea" aria-hidden="true">#</a> 01\u3001\u4E0B\u8F7D IDEA</h3>',8),d=a("IntelliJ IDEA \u7684\u5B98\u65B9\u4E0B\u8F7D\u5730\u5740\u4E3A\uFF1A"),v={href:"https://www.jetbrains.com/idea/download",target:"_blank",rel:"noopener noreferrer"},g=a("https://www.jetbrains.com/idea/download/"),m=t(`<p><img src="https://cdn.jsdelivr.net/gh/itwanger/itwanger.github.io/assets/images/2019/11/java-idea-community-1.png" alt=""></p><p>UItimate \u4E3A\u4ED8\u8D39\u7248\uFF0C\u53EF\u4EE5\u514D\u8D39\u8BD5\u7528\uFF0C\u4E3B\u8981\u9488\u5BF9\u7684\u662F Web \u548C\u4F01\u4E1A\u5F00\u53D1\u7528\u6237\uFF1BCommunity \u4E3A\u514D\u8D39\u7248\uFF0C\u53EF\u4EE5\u514D\u8D39\u4F7F\u7528\uFF0C\u4E3B\u8981\u9488\u5BF9\u7684\u662F Java \u521D\u5B66\u8005\u548C\u5B89\u5353\u5F00\u53D1\u7528\u6237\u3002</p><p>\u529F\u80FD\u4E0A\u7684\u5DEE\u522B\u5982\u4E0B\u56FE\u6240\u793A\u3002</p><p><img src="https://cdn.jsdelivr.net/gh/itwanger/itwanger.github.io/assets/images/2019/11/java-idea-community-2.png" alt=""></p><p>\u672C\u7BC7\u6559\u7A0B\u4E3B\u8981\u9488\u5BF9\u7684\u662F Java \u521D\u5B66\u8005\uFF0C\u6240\u4EE5\u9009\u62E9\u514D\u8D39\u7248\u4E3A\u4F8B\uFF0C\u70B9\u51FB\u300CDownload\u300D\u8FDB\u884C\u4E0B\u8F7D\u3002</p><p>\u7A0D\u7B49\u4E00\u5206\u949F\u65F6\u95F4\uFF0C\u5927\u6982 580M\u3002</p><h3 id="_02\u3001\u5B89\u88C5-idea" tabindex="-1"><a class="header-anchor" href="#_02\u3001\u5B89\u88C5-idea" aria-hidden="true">#</a> 02\u3001\u5B89\u88C5 IDEA</h3><p>\u53CC\u51FB\u8FD0\u884C IDEA \u5B89\u88C5\u7A0B\u5E8F\uFF0C\u4E00\u6B65\u6B65\u50BB\u74DC\u5F0F\u7684\u4E0B\u4E00\u6B65\u5C31\u884C\u4E86\u3002</p><p><img src="https://cdn.jsdelivr.net/gh/itwanger/itwanger.github.io/assets/images/2019/11/java-idea-community-3.png" alt=""></p><p><img src="https://cdn.jsdelivr.net/gh/itwanger/itwanger.github.io/assets/images/2019/11/java-idea-community-4.png" alt=""></p><p><img src="https://cdn.jsdelivr.net/gh/itwanger/itwanger.github.io/assets/images/2019/11/java-idea-community-5.png" alt=""></p><p>\u4E3A\u4E86\u65B9\u4FBF\u542F\u52A8 IDEA\uFF0C\u53EF\u4EE5\u52FE\u9009\u301064-bit launcher\u3011\u590D\u9009\u6846\u3002\u4E3A\u4E86\u5173\u8054 Java \u6E90\u6587\u4EF6\uFF0C\u53EF\u4EE5\u52FE\u9009\u3010.java\u3011\u590D\u9009\u6846\u3002</p><p><img src="https://cdn.jsdelivr.net/gh/itwanger/itwanger.github.io/assets/images/2019/11/java-idea-community-6.png" alt=""></p><p>\u70B9\u51FB\u3010Install\u3011\u540E\uFF0C\u9700\u8981\u9759\u9759\u5730\u7B49\u5F85\u4E00\u4F1A\uFF0C\u5927\u6982\u4E00\u5206\u949F\u7684\u65F6\u95F4\uFF0C\u8D81\u673A\u4F11\u606F\u4E00\u4E0B\u773C\u775B\u3002</p><p><img src="https://cdn.jsdelivr.net/gh/itwanger/itwanger.github.io/assets/images/2019/11/java-idea-community-7.png" alt=""></p><p>\u5B89\u88C5\u5B8C\u6210\u540E\u7684\u754C\u9762\u5982\u4E0B\u56FE\u6240\u793A\u3002</p><p><img src="https://cdn.jsdelivr.net/gh/itwanger/itwanger.github.io/assets/images/2019/11/java-idea-community-8.png" alt=""></p><h3 id="_03\u3001\u542F\u52A8-idea" tabindex="-1"><a class="header-anchor" href="#_03\u3001\u542F\u52A8-idea" aria-hidden="true">#</a> 03\u3001\u542F\u52A8 IDEA</h3><p>\u56DE\u5230\u684C\u9762\uFF0C\u53CC\u51FB\u8FD0\u884C IDEA \u7684\u5FEB\u6377\u65B9\u5F0F\uFF0C\u542F\u52A8 IDEA\u3002</p><p><img src="https://cdn.jsdelivr.net/gh/itwanger/itwanger.github.io/assets/images/2019/11/java-idea-community-9.png" alt=""></p><p>\u5047\u88C5\u9605\u8BFB\u5B8C\u6761\u6B3E\u540E\uFF0C\u52FE\u9009\u540C\u610F\u590D\u9009\u6846\uFF0C\u70B9\u51FB\u3010Continue\u3011</p><p><img src="https://cdn.jsdelivr.net/gh/itwanger/itwanger.github.io/assets/images/2019/11/java-idea-community-10.png" alt=""></p><p>\u5982\u679C\u60F3\u8981\u5E2E\u52A9 IDEA \u6536\u96C6\u6539\u8FDB\u4FE1\u606F\uFF0C\u53EF\u4EE5\u70B9\u51FB\u3010Send Usage Statistics\u3011\uFF1B\u5426\u5219\u70B9\u51FB\u3010Don&#39;t send\u3011\u3002</p><p><img src="https://cdn.jsdelivr.net/gh/itwanger/itwanger.github.io/assets/images/2019/11/java-idea-community-11.png" alt=""></p><p>\u5230\u6B64\uFF0CIntellij IDEA \u7684\u5B89\u88C5\u5C31\u5B8C\u6210\u4E86\uFF0C\u5F88\u7B80\u5355\u3002</p><h2 id="\u4E8C\u3001hello-world" tabindex="-1"><a class="header-anchor" href="#\u4E8C\u3001hello-world" aria-hidden="true">#</a> \u4E8C\u3001Hello World</h2><p>\u7B2C\u4E00\u4E2A Java \u7A0B\u5E8F\u975E\u5E38\u7B80\u5355\uFF0C\u4EE3\u7801\u5982\u4E0B\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token doc-comment comment">/**
  * <span class="token keyword">@author</span> \u5FAE\u4FE1\u641C\u300C\u6C89\u9ED8\u738B\u4E8C\u300D\uFF0C\u56DE\u590D\u5173\u952E\u5B57 PDF
  */</span>
 <span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">HelloWorld</span> <span class="token punctuation">{</span>
diff --git a/dist/assets/history.html.6bcd3b59.js b/dist/assets/history.html.57bb6aeb.js
similarity index 99%
rename from dist/assets/history.html.6bcd3b59.js
rename to dist/assets/history.html.57bb6aeb.js
index 17e1c53b..d15b9c97 100644
--- a/dist/assets/history.html.6bcd3b59.js
+++ b/dist/assets/history.html.57bb6aeb.js
@@ -1 +1 @@
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diff --git a/dist/assets/home.html.25268b5b.js b/dist/assets/home.html.25268b5b.js
new file mode 100644
index 00000000..ef8959c4
--- /dev/null
+++ b/dist/assets/home.html.25268b5b.js
@@ -0,0 +1 @@
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src="https://img.shields.io/badge/\u8BA1\u7B97\u673A\u7ECF\u5178\u7535\u5B50\u4E66-\u4E0B\u8F7D-green.svg" alt="\u65E0\u5957\u8DEF\u4E0B\u8F7D"></a></p></div><h2 id="\u4E3A\u4EC0\u4E48\u4F1A\u6709\u8FD9\u4E2A\u5F00\u6E90\u77E5\u8BC6\u5E93" tabindex="-1"><a class="header-anchor" href="#\u4E3A\u4EC0\u4E48\u4F1A\u6709\u8FD9\u4E2A\u5F00\u6E90\u77E5\u8BC6\u5E93" aria-hidden="true">#</a> \u4E3A\u4EC0\u4E48\u4F1A\u6709\u8FD9\u4E2A\u5F00\u6E90\u77E5\u8BC6\u5E93</h2><p>\u77E5\u8BC6\u5E93\u53D6\u540D <strong>toBeBetterJavaer</strong>\uFF0C\u5373 <strong>To Be Better Javaer</strong>\uFF0C\u610F\u4E3A\u300C\u6210\u4E3A\u4E00\u540D\u66F4\u597D\u7684 Java \u7A0B\u5E8F\u5458\u300D\uFF0C\u662F\u81EA\u5B66 Java \u4EE5\u6765\u6240\u6709\u539F\u521B\u6587\u7AE0\u548C\u5B66\u4E60\u8D44\u6599\u7684\u5927\u805A\u5408\u3002\u5185\u5BB9\u5305\u62EC Java \u57FA\u7840\u3001Java \u5E76\u53D1\u7F16\u7A0B\u3001Java \u865A\u62DF\u673A\u3001Java \u4F01\u4E1A\u7EA7\u5F00\u53D1\u3001Java 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Redis")],-1),ca=l("Redis\u5165\u95E8(\u9002\u5408\u65B0\u624B)"),ma=l("\u804A\u804A\u7F13\u5B58\u96EA\u5D29\u3001\u7A7F\u900F\u3001\u51FB\u7A7F"),fa=t("h3",{id:"mongodb",tabindex:"-1"},[t("a",{class:"header-anchor",href:"#mongodb","aria-hidden":"true"},"#"),l(" MongoDB")],-1),va=l("MongoDB\u6700\u57FA\u7840\u5165\u95E8\u6559\u7A0B"),ga=t("h2",{id:"\u8BA1\u7B97\u673A\u57FA\u7840",tabindex:"-1"},[t("a",{class:"header-anchor",href:"#\u8BA1\u7B97\u673A\u57FA\u7840","aria-hidden":"true"},"#"),l(" \u8BA1\u7B97\u673A\u57FA\u7840")],-1),ba=t("p",null,[t("strong",null,"\u8BA1\u7B97\u673A\u57FA\u7840\u5305\u62EC\u64CD\u4F5C\u7CFB\u7EDF\u3001\u8BA1\u7B97\u673A\u7F51\u7EDC\u3001\u8BA1\u7B97\u673A\u7EC4\u6210\u539F\u7406\u3001\u6570\u636E\u7ED3\u6784\u4E0E\u7B97\u6CD5\u7B49"),l("\u3002\u5BF9\u4E8E\u4EFB\u4F55\u4E00\u540D\u60F3\u8981\u8D70\u5F97\u66F4\u8FDC\u7684 Java \u540E\u7AEF\u5F00\u53D1\u6765\u8BF4\uFF0C\u90FD\u662F\u5FC5\u987B\u8981\u82B1\u65F6\u95F4\u548C\u7CBE\u529B\u53BB\u592F\u5B9E\u7684\u3002\u4E07\u4E08\u9AD8\u9732\u5E73\u5730\u8D77\uFF0C\u52FF\u5728\u6D6E\u6C99\u7B51\u9AD8\u53F0\u3002")],-1),pa=l("\u8BA1\u7B97\u673A\u64CD\u4F5C\u7CFB\u7EDF\u77E5\u8BC6\u70B9\u5927\u68B3\u7406"),Ja=l("\u8BA1\u7B97\u673A\u7F51\u7EDC\u6838\u5FC3\u77E5\u8BC6\u70B9\u5927\u68B3\u7406"),xa=t("h2",{id:"\u6C42\u804C\u9762\u8BD5",tabindex:"-1"},[t("a",{class:"header-anchor",href:"#\u6C42\u804C\u9762\u8BD5","aria-hidden":"true"},"#"),l(" \u6C42\u804C\u9762\u8BD5")],-1),ja=t("p",null,[t("strong",null,"\u5B66\u4E60\u4E86\u90A3\u4E48\u591A Java \u77E5\u8BC6\uFF0C\u8017\u8D39\u4E86\u65E0\u6570\u7684\u8111\u7EC6\u80DE\uFF0C\u71AC\u6389\u4E86\u65E0\u6570\u6839\u79C0\u53D1\uFF0C\u4E3A\u7684\u662F\u4EC0\u4E48\uFF1F\u5F53\u7136\u662F\u8C0B\u53D6\u4E00\u4EFD\u5FC3\u4EEA\u7684 offer \u4E86"),l("\u3002\u90A3\u516B\u80A1\u6587\u3001\u9762\u8BD5\u9898\u3001\u57CE\u5E02\u9009\u62E9\u3001\u4F18\u8D28\u9762\u7ECF\u53C8\u600E\u80FD\u5C11\u5F97\u4E86\u5462\uFF1F\u5343\u6DD8\u4E07\u6F09\u867D\u8F9B\u82E6\uFF0C\u5439\u5C3D\u72C2\u6C99\u59CB\u5230\u91D1\u3002")],-1),ya=t("h3",{id:"\u9762\u8BD5\u9898\u96C6\u5408",tabindex:"-1"},[t("a",{class:"header-anchor",href:"#\u9762\u8BD5\u9898\u96C6\u5408","aria-hidden":"true"},"#"),l(" \u9762\u8BD5\u9898\u96C6\u5408")],-1),wa=l("Java\uFF1A34\u9053\u7CBE\u9009\u9AD8\u9891\u9762\u8BD5\u9898"),ka=l("Java\uFF1A13\u9053HashMap\u7CBE\u9009\u9762\u8BD5\u9898"),Ba=l("Redis\uFF1A12\u9053\u7CBE\u9009\u9AD8\u9891\u9762\u8BD5\u9898\uFF09"),Sa=l("Nginx\uFF1A40\u9053\u7CBE\u9009\u9762\u8BD5\u9898"),qa=t("h3",{id:"\u80CC\u8BF5\u7248\u516B\u80A1\u6587",tabindex:"-1"},[t("a",{class:"header-anchor",href:"#\u80CC\u8BF5\u7248\u516B\u80A1\u6587","aria-hidden":"true"},"#"),l(" \u80CC\u8BF5\u7248\u516B\u80A1\u6587")],-1),za=l("Java 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noreferrer"},Ga=l("\u5B57\u8282\u5C0F\u59D0\u59D0\u7684\u4E00\u4EFD\u79CB\u62DB\u653B\u7565"),Pa={href:"https://mp.weixin.qq.com/s/6TYEDM73N68vKXpmLRKhHA",target:"_blank",rel:"noopener noreferrer"},Ra=l("\u9762\u8BD5\u5E38\u89C1\u8BCD\u6C47\u626B\u76F2+\u5E38\u89C1\u5927\u5382\u9762\u8BD5\u7279\u70B9\u5206\u4EAB"),Da={href:"https://mp.weixin.qq.com/s/vnMZY9Gsy3o1FwMi4f1GlA",target:"_blank",rel:"noopener noreferrer"},Na=l("\u53CC\u975E\u5B66\u5386\u7684\u793E\u755C\uFF0C\u5386\u7ECF 6 \u8F6E\u9762\u8BD5\uFF0C\u6700\u7EC8\u62FF\u4E0B\u963F\u91CCOffer"),Qa=t("h3",{id:"\u9762\u8BD5\u51C6\u5907",tabindex:"-1"},[t("a",{class:"header-anchor",href:"#\u9762\u8BD5\u51C6\u5907","aria-hidden":"true"},"#"),l(" \u9762\u8BD5\u51C6\u5907")],-1),Va={href:"https://mp.weixin.qq.com/s/qurUqeD_VyiJRtB38vOuSw",target:"_blank",rel:"noopener noreferrer"},Ea=l("\u7B80\u5386\u5982\u4F55\u4F18\u5316\uFF0C\u7B80\u5386\u5982\u4F55\u6295\u9012\uFF0C\u9762\u8BD5\u5982\u4F55\u51C6\u5907\uFF1F"),Ka={href:"https://mp.weixin.qq.com/s/rO7cU4NX74CoWADo_O4IUw",target:"_blank",rel:"noopener noreferrer"},Ua=l("\u6821\u62DB\u65F6\u95F4\u8282\u70B9\u3001\u7B80\u5386\u7F16\u5199\u3001\u7B14\u8BD5\u3001\u3001HR\u9762\u3001\u5B9E\u4E60\u7B49\u6CE8\u610F\u4E8B\u9879"),Fa=t("h3",{id:"\u57CE\u5E02\u9009\u62E9",tabindex:"-1"},[t("a",{class:"header-anchor",href:"#\u57CE\u5E02\u9009\u62E9","aria-hidden":"true"},"#"),l(" 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id="\u5DE5\u4F5C\u4F53\u4F1A" tabindex="-1"><a class="header-anchor" href="#\u5DE5\u4F5C\u4F53\u4F1A" aria-hidden="true">#</a> \u5DE5\u4F5C\u4F53\u4F1A</h3><h2 id="\u5B66\u4E60\u8D44\u6E90" tabindex="-1"><a class="header-anchor" href="#\u5B66\u4E60\u8D44\u6E90" aria-hidden="true">#</a> \u5B66\u4E60\u8D44\u6E90</h2><ul><li><strong>\u4E0D\u77E5\u9053\u5B66\u4EC0\u4E48\uFF1F\u4E0D\u77E5\u9053\u8BE5\u600E\u4E48\u5B66\uFF1F\u627E\u4E0D\u5230\u4F18\u8D28\u7684\u5B66\u4E60\u8D44\u6E90</strong>\uFF1F\u8FD9\u4E9B\u95EE\u9898\u5728\u8FD9\u91CC\u7EDF\u7EDF\u90FD\u53EF\u4EE5\u627E\u5230\u7B54\u6848\u3002</li><li>\u6211\u4F1A\u628A\u81EA\u5DF1\u5341\u591A\u5E74\u7684\u7F16\u7A0B\u7ECF\u9A8C\u548C\u5B66\u4E60\u8D44\u6E90\u6BEB\u4E0D\u4FDD\u7559\u7684\u5206\u4EAB\u51FA\u6765\u3002</li></ul><h3 id="pdf\u4E0B\u8F7D" tabindex="-1"><a class="header-anchor" href="#pdf\u4E0B\u8F7D" aria-hidden="true">#</a> PDF\u4E0B\u8F7D</h3>',4),so=l("\u{1F44F}\u4E0B\u8F7D\u2192Java\u7A0B\u5E8F\u5458\u5E38\u8BFB\u4E66\u5355"),ho={href:"https://mp.weixin.qq.com/s/US5nTxbC2nYc1hWpn5Bozw",target:"_blank",rel:"noopener noreferrer"},_o=l("\u{1F44F}\u4E0B\u8F7D\u2192\u6700\u5168\u6700\u786C\u6838\u7684Java\u9762\u8BD5 \u201C\u5907\u6218\u201D \u8D44\u6599"),ro={href:"https://mp.weixin.qq.com/s/pxKrjw_5NTdZfHOKCkwn8w",target:"_blank",rel:"noopener noreferrer"},uo=l("\u{1F44F}\u4E0B\u8F7D\u2192\u6DF1\u5165\u6D45\u51FAJava\u591A\u7EBF\u7A0B"),co={href:"https://mp.weixin.qq.com/s/d7Z0QoChNuP9bTwAGh2QCw",target:"_blank",rel:"noopener noreferrer"},mo=l("\u{1F44F}\u4E0B\u8F7D\u2192GitHub\u661F\u6807115k+\u7684Java\u6559\u7A0B"),fo={href:"https://mp.weixin.qq.com/s/PH5AizUAnTz0CuvJclpAKw",target:"_blank",rel:"noopener noreferrer"},vo=l("\u{1F44F}\u4E0B\u8F7D\u2192\u91CD\u5B66Java\u8BBE\u8BA1\u6A21\u5F0F"),go={href:"https://mp.weixin.qq.com/s/PH5AizUAnTz0CuvJclpAKw",target:"_blank",rel:"noopener 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diff --git a/dist/assets/home.html.c8d9ace7.js b/dist/assets/home.html.c8d9ace7.js
deleted file mode 100644
index c02b2992..00000000
--- a/dist/assets/home.html.c8d9ace7.js
+++ /dev/null
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Redis")],-1),ma=l("Redis\u5165\u95E8(\u9002\u5408\u65B0\u624B)"),fa=l("\u804A\u804A\u7F13\u5B58\u96EA\u5D29\u3001\u7A7F\u900F\u3001\u51FB\u7A7F"),va=t("h3",{id:"mongodb",tabindex:"-1"},[t("a",{class:"header-anchor",href:"#mongodb","aria-hidden":"true"},"#"),l(" MongoDB")],-1),ga=l("MongoDB\u6700\u57FA\u7840\u5165\u95E8\u6559\u7A0B"),ba=t("h2",{id:"\u8BA1\u7B97\u673A\u57FA\u7840",tabindex:"-1"},[t("a",{class:"header-anchor",href:"#\u8BA1\u7B97\u673A\u57FA\u7840","aria-hidden":"true"},"#"),l(" \u8BA1\u7B97\u673A\u57FA\u7840")],-1),pa=t("p",null,[t("strong",null,"\u8BA1\u7B97\u673A\u57FA\u7840\u5305\u62EC\u64CD\u4F5C\u7CFB\u7EDF\u3001\u8BA1\u7B97\u673A\u7F51\u7EDC\u3001\u8BA1\u7B97\u673A\u7EC4\u6210\u539F\u7406\u3001\u6570\u636E\u7ED3\u6784\u4E0E\u7B97\u6CD5\u7B49"),l("\u3002\u5BF9\u4E8E\u4EFB\u4F55\u4E00\u540D\u60F3\u8981\u8D70\u5F97\u66F4\u8FDC\u7684 Java \u540E\u7AEF\u5F00\u53D1\u6765\u8BF4\uFF0C\u90FD\u662F\u5FC5\u987B\u8981\u82B1\u65F6\u95F4\u548C\u7CBE\u529B\u53BB\u592F\u5B9E\u7684\u3002\u4E07\u4E08\u9AD8\u9732\u5E73\u5730\u8D77\uFF0C\u52FF\u5728\u6D6E\u6C99\u7B51\u9AD8\u53F0\u3002")],-1),Ja=l("\u8BA1\u7B97\u673A\u64CD\u4F5C\u7CFB\u7EDF\u77E5\u8BC6\u70B9\u5927\u68B3\u7406"),xa=l("\u8BA1\u7B97\u673A\u7F51\u7EDC\u6838\u5FC3\u77E5\u8BC6\u70B9\u5927\u68B3\u7406"),ja=t("h2",{id:"\u6C42\u804C\u9762\u8BD5",tabindex:"-1"},[t("a",{class:"header-anchor",href:"#\u6C42\u804C\u9762\u8BD5","aria-hidden":"true"},"#"),l(" \u6C42\u804C\u9762\u8BD5")],-1),ya=t("p",null,[t("strong",null,"\u5B66\u4E60\u4E86\u90A3\u4E48\u591A Java \u77E5\u8BC6\uFF0C\u8017\u8D39\u4E86\u65E0\u6570\u7684\u8111\u7EC6\u80DE\uFF0C\u71AC\u6389\u4E86\u65E0\u6570\u6839\u79C0\u53D1\uFF0C\u4E3A\u7684\u662F\u4EC0\u4E48\uFF1F\u5F53\u7136\u662F\u8C0B\u53D6\u4E00\u4EFD\u5FC3\u4EEA\u7684 offer \u4E86"),l("\u3002\u90A3\u516B\u80A1\u6587\u3001\u9762\u8BD5\u9898\u3001\u57CE\u5E02\u9009\u62E9\u3001\u4F18\u8D28\u9762\u7ECF\u53C8\u600E\u80FD\u5C11\u5F97\u4E86\u5462\uFF1F\u5343\u6DD8\u4E07\u6F09\u867D\u8F9B\u82E6\uFF0C\u5439\u5C3D\u72C2\u6C99\u59CB\u5230\u91D1\u3002")],-1),wa=t("h3",{id:"\u9762\u8BD5\u9898\u96C6\u5408",tabindex:"-1"},[t("a",{class:"header-anchor",href:"#\u9762\u8BD5\u9898\u96C6\u5408","aria-hidden":"true"},"#"),l(" \u9762\u8BD5\u9898\u96C6\u5408")],-1),ka=l("Java\uFF1A34\u9053\u7CBE\u9009\u9AD8\u9891\u9762\u8BD5\u9898"),Sa=l("Java\uFF1A13\u9053HashMap\u7CBE\u9009\u9762\u8BD5\u9898"),qa=l("Redis\uFF1A12\u9053\u7CBE\u9009\u9AD8\u9891\u9762\u8BD5\u9898\uFF09"),Ba=l("Nginx\uFF1A40\u9053\u7CBE\u9009\u9762\u8BD5\u9898"),za=t("h3",{id:"\u80CC\u8BF5\u7248\u516B\u80A1\u6587",tabindex:"-1"},[t("a",{class:"header-anchor",href:"#\u80CC\u8BF5\u7248\u516B\u80A1\u6587","aria-hidden":"true"},"#"),l(" \u80CC\u8BF5\u7248\u516B\u80A1\u6587")],-1),La=l("Java 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noreferrer"},Pa=l("\u5B57\u8282\u5C0F\u59D0\u59D0\u7684\u4E00\u4EFD\u79CB\u62DB\u653B\u7565"),Ra={href:"https://mp.weixin.qq.com/s/6TYEDM73N68vKXpmLRKhHA",target:"_blank",rel:"noopener noreferrer"},Da=l("\u9762\u8BD5\u5E38\u89C1\u8BCD\u6C47\u626B\u76F2+\u5E38\u89C1\u5927\u5382\u9762\u8BD5\u7279\u70B9\u5206\u4EAB"),Na={href:"https://mp.weixin.qq.com/s/vnMZY9Gsy3o1FwMi4f1GlA",target:"_blank",rel:"noopener noreferrer"},Qa=l("\u53CC\u975E\u5B66\u5386\u7684\u793E\u755C\uFF0C\u5386\u7ECF 6 \u8F6E\u9762\u8BD5\uFF0C\u6700\u7EC8\u62FF\u4E0B\u963F\u91CCOffer"),Va=t("h3",{id:"\u9762\u8BD5\u51C6\u5907",tabindex:"-1"},[t("a",{class:"header-anchor",href:"#\u9762\u8BD5\u51C6\u5907","aria-hidden":"true"},"#"),l(" \u9762\u8BD5\u51C6\u5907")],-1),Ea={href:"https://mp.weixin.qq.com/s/qurUqeD_VyiJRtB38vOuSw",target:"_blank",rel:"noopener noreferrer"},Ka=l("\u7B80\u5386\u5982\u4F55\u4F18\u5316\uFF0C\u7B80\u5386\u5982\u4F55\u6295\u9012\uFF0C\u9762\u8BD5\u5982\u4F55\u51C6\u5907\uFF1F"),Ua={href:"https://mp.weixin.qq.com/s/rO7cU4NX74CoWADo_O4IUw",target:"_blank",rel:"noopener noreferrer"},Fa=l("\u6821\u62DB\u65F6\u95F4\u8282\u70B9\u3001\u7B80\u5386\u7F16\u5199\u3001\u7B14\u8BD5\u3001\u3001HR\u9762\u3001\u5B9E\u4E60\u7B49\u6CE8\u610F\u4E8B\u9879"),Wa=t("h3",{id:"\u57CE\u5E02\u9009\u62E9",tabindex:"-1"},[t("a",{class:"header-anchor",href:"#\u57CE\u5E02\u9009\u62E9","aria-hidden":"true"},"#"),l(" \u57CE\u5E02\u9009\u62E9")],-1),Za=l("\u5317\u4EAC\u90FD\u6709\u54EA\u4E9B\u725B\u903C\u7684\u4E92\u8054\u7F51\u516C\u53F8\uFF1F"),Ya=l("\u60F3\u53BB\u5E7F\u5DDE\u4E86\uFF01"),Xa=l("\u6DF1\u5733\u6709\u54EA\u4E9B\u725B\u6279\u7684\u4E92\u8054\u7F51\u516C\u53F8\uFF1F"),$a=l("\u897F\u5B89\u6709\u54EA\u4E9B\u4E0D\u9519\u7684\u4E92\u8054\u7F51\u516C\u53F8\uFF1F"),to=l("\u9752\u5C9B\u6709\u725B\u903C\u7684\u4E92\u8054\u7F51\u516C\u53F8\u5417\uFF1F"),lo=l("\u90D1\u5DDE\u6709\u54EA\u4E9B\u4E0D\u9519\u7684\u4E92\u8054\u7F51\u516C\u53F8\uFF1F"),eo=l("\u60F3\u642C\u53BB\u82CF\u5DDE\u751F\u6D3B\u4E86\u3002\u3002\u3002"),ao=l("\u5357\u4EAC\u6709\u54EA\u4E9B\u9760\u8C31\u7684\u4E92\u8054\u7F51\u516C\u53F8\uFF1F"),oo=l("\u676D\u5DDE\u6709\u54EA\u4E9B\u9876\u7EA7\u7684\u4E92\u8054\u7F51\u516C\u53F8\uFF1F"),no=l("\u6210\u90FD\u6709\u54EA\u4E9B\u725B\u6279\u7684\u4E92\u8054\u7F51\u516C\u53F8\uFF1F"),io=i('<h3 id="\u5DE5\u4F5C\u4F53\u4F1A" tabindex="-1"><a class="header-anchor" href="#\u5DE5\u4F5C\u4F53\u4F1A" aria-hidden="true">#</a> \u5DE5\u4F5C\u4F53\u4F1A</h3><h2 id="\u5B66\u4E60\u8D44\u6E90" tabindex="-1"><a class="header-anchor" href="#\u5B66\u4E60\u8D44\u6E90" aria-hidden="true">#</a> \u5B66\u4E60\u8D44\u6E90</h2><ul><li><strong>\u4E0D\u77E5\u9053\u5B66\u4EC0\u4E48\uFF1F\u4E0D\u77E5\u9053\u8BE5\u600E\u4E48\u5B66\uFF1F\u627E\u4E0D\u5230\u4F18\u8D28\u7684\u5B66\u4E60\u8D44\u6E90</strong>\uFF1F\u8FD9\u4E9B\u95EE\u9898\u5728\u8FD9\u91CC\u7EDF\u7EDF\u90FD\u53EF\u4EE5\u627E\u5230\u7B54\u6848\u3002</li><li>\u6211\u4F1A\u628A\u81EA\u5DF1\u5341\u591A\u5E74\u7684\u7F16\u7A0B\u7ECF\u9A8C\u548C\u5B66\u4E60\u8D44\u6E90\u6BEB\u4E0D\u4FDD\u7559\u7684\u5206\u4EAB\u51FA\u6765\u3002</li></ul><h3 id="pdf\u4E0B\u8F7D" tabindex="-1"><a class="header-anchor" href="#pdf\u4E0B\u8F7D" aria-hidden="true">#</a> PDF\u4E0B\u8F7D</h3>',4),so=l("\u{1F44F}\u4E0B\u8F7D\u2192Java\u7A0B\u5E8F\u5458\u5E38\u8BFB\u4E66\u5355"),ho={href:"https://mp.weixin.qq.com/s/US5nTxbC2nYc1hWpn5Bozw",target:"_blank",rel:"noopener noreferrer"},_o=l("\u{1F44F}\u4E0B\u8F7D\u2192\u6700\u5168\u6700\u786C\u6838\u7684Java\u9762\u8BD5 \u201C\u5907\u6218\u201D \u8D44\u6599"),ro={href:"https://mp.weixin.qq.com/s/pxKrjw_5NTdZfHOKCkwn8w",target:"_blank",rel:"noopener noreferrer"},uo=l("\u{1F44F}\u4E0B\u8F7D\u2192\u6DF1\u5165\u6D45\u51FAJava\u591A\u7EBF\u7A0B"),co={href:"https://mp.weixin.qq.com/s/d7Z0QoChNuP9bTwAGh2QCw",target:"_blank",rel:"noopener noreferrer"},mo=l("\u{1F44F}\u4E0B\u8F7D\u2192GitHub\u661F\u6807115k+\u7684Java\u6559\u7A0B"),fo={href:"https://mp.weixin.qq.com/s/PH5AizUAnTz0CuvJclpAKw",target:"_blank",rel:"noopener noreferrer"},vo=l("\u{1F44F}\u4E0B\u8F7D\u2192\u91CD\u5B66Java\u8BBE\u8BA1\u6A21\u5F0F"),go={href:"https://mp.weixin.qq.com/s/PH5AizUAnTz0CuvJclpAKw",target:"_blank",rel:"noopener 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diff --git a/dist/assets/how-jvm-run-zijiema-zhiling.html.4c09b054.js b/dist/assets/how-jvm-run-zijiema-zhiling.html.f5dbcd2c.js
similarity index 99%
rename from dist/assets/how-jvm-run-zijiema-zhiling.html.4c09b054.js
rename to dist/assets/how-jvm-run-zijiema-zhiling.html.f5dbcd2c.js
index 41cc4b82..552225e4 100644
--- a/dist/assets/how-jvm-run-zijiema-zhiling.html.4c09b054.js
+++ b/dist/assets/how-jvm-run-zijiema-zhiling.html.f5dbcd2c.js
@@ -1,4 +1,4 @@
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\u865A\u62DF\u673A\u6700\u6838\u5FC3\u7684\u7EC4\u6210\u90E8\u5206\u4E4B\u4E00\u3002\u300C\u865A\u62DF\u673A\u300D\u662F\u76F8\u5BF9\u4E8E\u300C\u7269\u7406\u673A\u300D\u7684\u6982\u5FF5\uFF0C\u8FD9\u4E24\u79CD\u673A\u5668\u90FD\u6709\u4EE3\u7801\u6267\u884C\u7684\u80FD\u529B\uFF0C\u533A\u522B\u662F\u7269\u7406\u673A\u7684\u6267\u884C\u5F15\u64CE\u662F\u76F4\u63A5\u5EFA\u7ACB\u5728\u5904\u7406\u5668\u3001\u786C\u4EF6\u3001\u6307\u4EE4\u96C6\u548C\u64CD\u4F5C\u7CFB\u7EDF\u5C42\u9762\u4E0A\u7684\uFF0C\u800C\u865A\u62DF\u673A\u6267\u884C\u5F15\u64CE\u662F\u7531\u81EA\u5DF1\u5B9E\u73B0\u7684\uFF0C\u56E0\u6B64\u53EF\u4EE5\u81EA\u884C\u5236\u5B9A\u6307\u4EE4\u96C6\u4E0E\u6267\u884C\u5F15\u64CE\u7684\u7ED3\u6784\u4F53\u7CFB\uFF0C\u5E76\u4E14\u80FD\u591F\u6267\u884C\u90A3\u4E9B\u4E0D\u88AB\u786C\u4EF6\u76F4\u63A5\u652F\u6301\u7684\u6307\u4EE4\u96C6\u683C\u5F0F\u3002</p><p>\u5728 Java \u865A\u62DF\u673A\u89C4\u8303\u4E2D\u5236\u5B9A\u4E86\u865A\u62DF\u673A\u5B57\u8282\u7801\u6267\u884C\u5F15\u64CE\u7684\u6982\u5FF5\u6A21\u578B\uFF0C\u8FD9\u4E2A\u6982\u5FF5\u6A21\u578B\u6210\u4E3A\u5404\u79CD\u865A\u62DF\u673A\u6267\u884C\u5F15\u64CE\u7684\u7EDF\u4E00\u5916\u89C2\uFF08Facade\uFF09\u3002\u5728\u4E0D\u540C\u7684\u865A\u62DF\u673A\u5B9E\u73B0\u91CC\uFF0C\u6267\u884C\u5F15\u64CE\u5728\u6267\u884C Java \u4EE3\u7801\u7684\u65F6\u5019\u53EF\u80FD\u4F1A\u6709\u89E3\u91CA\u6267\u884C\uFF08\u901A\u8FC7\u89E3\u91CA\u5668\u6267\u884C\uFF09\u548C\u7F16\u8BD1\u6267\u884C\uFF08\u901A\u8FC7\u5373\u65F6\u7F16\u8BD1\u5668\u4EA7\u751F\u672C\u5730\u4EE3\u7801\u6267\u884C\uFF09\u4E24\u79CD\u65B9\u5F0F\uFF0C\u4E5F\u53EF\u80FD\u4E24\u8005\u90FD\u6709\uFF0C\u751A\u81F3\u8FD8\u53EF\u80FD\u4F1A\u5305\u542B\u51E0\u4E2A\u4E0D\u540C\u7EA7\u522B\u7684\u7F16\u8BD1\u5668\u6267\u884C\u5F15\u64CE\u3002\u4F46\u4ECE\u5916\u89C2\u4E0A\u6765\u770B\uFF0C\u6240\u6709 Java \u865A\u62DF\u673A\u7684\u6267\u884C\u5F15\u64CE\u662F\u4E00\u81F4\u7684\uFF1A\u8F93\u5165\u7684\u662F\u5B57\u8282\u7801\u6587\u4EF6\uFF0C\u5904\u7406\u8FC7\u7A0B\u662F\u5B57\u8282\u7801\u89E3\u6790\u7684\u7B49\u6548\u8FC7\u7A0B\uFF0C\u8F93\u51FA\u7684\u662F\u6267\u884C\u7ED3\u679C\u3002</p><h3 id="\u4E00-\u8FD0\u884C\u65F6\u6808\u5E27\u7ED3\u6784" tabindex="-1"><a class="header-anchor" href="#\u4E00-\u8FD0\u884C\u65F6\u6808\u5E27\u7ED3\u6784" aria-hidden="true">#</a> \u4E00. \u8FD0\u884C\u65F6\u6808\u5E27\u7ED3\u6784</h3><p>\u6808\u5E27\uFF08Stack Frame\uFF09\u662F\u7528\u4E8E\u652F\u6301\u865A\u62DF\u673A\u8FDB\u884C\u65B9\u6CD5\u8C03\u7528\u548C\u65B9\u6CD5\u6267\u884C\u7684\u6570\u636E\u7ED3\u6784\uFF0C\u5B83\u662F\u865A\u62DF\u673A\u8FD0\u884C\u65F6\u6570\u636E\u533A\u4E2D\u7684\u865A\u62DF\u673A\u6808\u7684\u6808\u5143\u7D20\u3002\u6808\u5E27\u5B58\u50A8\u4E86\u65B9\u6CD5\u7684\u5C40\u90E8\u53D8\u91CF\u3001\u64CD\u4F5C\u6570\u6808\u3001\u52A8\u6001\u94FE\u63A5\u548C\u65B9\u6CD5\u8FD4\u56DE\u5730\u5740\u7B49\u4FE1\u606F\u3002<strong>\u6BCF\u4E00\u4E2A\u65B9\u6CD5\u4ECE\u8C03\u7528\u5F00\u59CB\u5230\u6267\u884C\u5B8C\u6210\u7684\u8FC7\u7A0B\uFF0C\u90FD\u5BF9\u5E94\u7740\u4E00\u4E2A\u6808\u5E27\u5728\u865A\u62DF\u673A\u6808\u91CC\u4ECE\u5165\u6808\u5230\u51FA\u6808\u7684\u8FC7\u7A0B\u3002</strong></p><p>\u6BCF\u4E00\u4E2A\u6808\u5E27\u90FD\u5305\u62EC\u4E86\u5C40\u90E8\u53D8\u91CF\u8868\u3001\u64CD\u4F5C\u6570\u6808\u3001\u52A8\u6001\u94FE\u63A5\u3001\u65B9\u6CD5\u8FD4\u56DE\u5730\u5740\u548C\u4E00\u4E9B\u989D\u5916\u7684\u9644\u52A0\u4FE1\u606F\u3002\u5728\u7F16\u8BD1\u7A0B\u5E8F\u4EE3\u7801\u65F6\uFF0C\u6808\u5E27\u4E2D\u9700\u8981\u591A\u5927\u7684\u5C40\u90E8\u53D8\u91CF\u8868\uFF0C\u591A\u6DF1\u7684\u64CD\u4F5C\u6570\u6808\u90FD\u5DF2\u7ECF\u5B8C\u5168\u786E\u5B9A\u4E86\uFF0C\u5E76\u4E14\u5199\u5165\u5230\u65B9\u6CD5\u8868\u7684 Code \u5C5E\u6027\u4E4B\u4E2D\uFF0C\u56E0\u6B64\u4E00\u4E2A\u6808\u5E27\u9700\u8981\u5206\u914D\u591A\u5C11\u5185\u5B58\uFF0C\u4E0D\u4F1A\u53D7\u5230\u7A0B\u5E8F\u8FD0\u884C\u671F\u53D8\u91CF\u6570\u636E\u7684\u5F71\u54CD\uFF0C\u800C\u4EC5\u4EC5\u53D6\u51B3\u4E8E\u5177\u4F53\u7684\u865A\u62DF\u673A\u5B9E\u73B0\u3002</p><p>\u4E00\u4E2A\u7EBF\u7A0B\u4E2D\u7684\u65B9\u6CD5\u8C03\u7528\u94FE\u53EF\u80FD\u4F1A\u5F88\u957F\uFF0C\u5F88\u591A\u65B9\u6CD5\u90FD\u5904\u4E8E\u6267\u884C\u72B6\u6001\u3002\u5BF9\u4E8E\u6267\u884C\u5F15\u64CE\u6765\u8BF4\uFF0C\u5728\u6D3B\u52A8\u7EBF\u7A0B\u4E2D\uFF0C\u53EA\u6709\u4F4D\u4E8E\u6808\u9876\u7684\u6808\u5E27\u624D\u662F\u6709\u6548\u7684\uFF0C\u79F0\u4E3A\u5F53\u524D\u6808\u5E27\uFF08Current Stack Frame\uFF09\uFF0C\u4E0E\u8FD9\u4E2A\u6808\u5E27\u76F8\u5173\u8054\u7684\u65B9\u6CD5\u6210\u4E3A\u5F53\u524D\u65B9\u6CD5\u3002\u6267\u884C\u5F15\u64CE\u8FD0\u884C\u7684\u6240\u6709\u5B57\u8282\u7801\u6307\u4EE4\u5BF9\u5F53\u524D\u6808\u5E27\u8FDB\u884C\u64CD\u4F5C\uFF0C\u5728\u6982\u5FF5\u6A21\u578B\u4E0A\uFF0C\u5178\u578B\u7684\u6808\u5E27\u7ED3\u6784\u5982\u4E0B\u56FE\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/how-jvm-run-zijiema-zhiling-a58ee82e-c0b0-4c06-9606-f7a0f0df0de9" alt=""></p><h4 id="\u5C40\u90E8\u53D8\u91CF\u8868" tabindex="-1"><a class="header-anchor" href="#\u5C40\u90E8\u53D8\u91CF\u8868" aria-hidden="true">#</a> \u5C40\u90E8\u53D8\u91CF\u8868</h4><p>\u5C40\u90E8\u53D8\u91CF\u8868\uFF08Local Variables Table\uFF09\u7528\u6765\u4FDD\u5B58\u65B9\u6CD5\u4E2D\u7684\u5C40\u90E8\u53D8\u91CF\uFF0C\u4EE5\u53CA\u65B9\u6CD5\u53C2\u6570\u3002\u5F53 Java \u6E90\u4EE3\u7801\u6587\u4EF6\u88AB\u7F16\u8BD1\u6210 class \u6587\u4EF6\u7684\u65F6\u5019\uFF0C\u5C40\u90E8\u53D8\u91CF\u8868\u7684\u6700\u5927\u5BB9\u91CF\u5C31\u5DF2\u7ECF\u786E\u5B9A\u4E86\u3002</p><p>\u6211\u4EEC\u6765\u770B\u8FD9\u6837\u4E00\u6BB5\u4EE3\u7801\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">LocalVaraiablesTable</span> <span class="token punctuation">{</span>
+import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as a,c as s,e}from"./app.615e41d8.js";const t={},p=e(`<h1 id="\u865A\u62DF\u673A\u662F\u5982\u4F55\u6267\u884C\u5B57\u8282\u7801\u6307\u4EE4\u7684" tabindex="-1"><a class="header-anchor" href="#\u865A\u62DF\u673A\u662F\u5982\u4F55\u6267\u884C\u5B57\u8282\u7801\u6307\u4EE4\u7684" aria-hidden="true">#</a> \u865A\u62DF\u673A\u662F\u5982\u4F55\u6267\u884C\u5B57\u8282\u7801\u6307\u4EE4\u7684\uFF1F</h1><p>\u6267\u884C\u5F15\u64CE\u662F Java \u865A\u62DF\u673A\u6700\u6838\u5FC3\u7684\u7EC4\u6210\u90E8\u5206\u4E4B\u4E00\u3002\u300C\u865A\u62DF\u673A\u300D\u662F\u76F8\u5BF9\u4E8E\u300C\u7269\u7406\u673A\u300D\u7684\u6982\u5FF5\uFF0C\u8FD9\u4E24\u79CD\u673A\u5668\u90FD\u6709\u4EE3\u7801\u6267\u884C\u7684\u80FD\u529B\uFF0C\u533A\u522B\u662F\u7269\u7406\u673A\u7684\u6267\u884C\u5F15\u64CE\u662F\u76F4\u63A5\u5EFA\u7ACB\u5728\u5904\u7406\u5668\u3001\u786C\u4EF6\u3001\u6307\u4EE4\u96C6\u548C\u64CD\u4F5C\u7CFB\u7EDF\u5C42\u9762\u4E0A\u7684\uFF0C\u800C\u865A\u62DF\u673A\u6267\u884C\u5F15\u64CE\u662F\u7531\u81EA\u5DF1\u5B9E\u73B0\u7684\uFF0C\u56E0\u6B64\u53EF\u4EE5\u81EA\u884C\u5236\u5B9A\u6307\u4EE4\u96C6\u4E0E\u6267\u884C\u5F15\u64CE\u7684\u7ED3\u6784\u4F53\u7CFB\uFF0C\u5E76\u4E14\u80FD\u591F\u6267\u884C\u90A3\u4E9B\u4E0D\u88AB\u786C\u4EF6\u76F4\u63A5\u652F\u6301\u7684\u6307\u4EE4\u96C6\u683C\u5F0F\u3002</p><p>\u5728 Java \u865A\u62DF\u673A\u89C4\u8303\u4E2D\u5236\u5B9A\u4E86\u865A\u62DF\u673A\u5B57\u8282\u7801\u6267\u884C\u5F15\u64CE\u7684\u6982\u5FF5\u6A21\u578B\uFF0C\u8FD9\u4E2A\u6982\u5FF5\u6A21\u578B\u6210\u4E3A\u5404\u79CD\u865A\u62DF\u673A\u6267\u884C\u5F15\u64CE\u7684\u7EDF\u4E00\u5916\u89C2\uFF08Facade\uFF09\u3002\u5728\u4E0D\u540C\u7684\u865A\u62DF\u673A\u5B9E\u73B0\u91CC\uFF0C\u6267\u884C\u5F15\u64CE\u5728\u6267\u884C Java \u4EE3\u7801\u7684\u65F6\u5019\u53EF\u80FD\u4F1A\u6709\u89E3\u91CA\u6267\u884C\uFF08\u901A\u8FC7\u89E3\u91CA\u5668\u6267\u884C\uFF09\u548C\u7F16\u8BD1\u6267\u884C\uFF08\u901A\u8FC7\u5373\u65F6\u7F16\u8BD1\u5668\u4EA7\u751F\u672C\u5730\u4EE3\u7801\u6267\u884C\uFF09\u4E24\u79CD\u65B9\u5F0F\uFF0C\u4E5F\u53EF\u80FD\u4E24\u8005\u90FD\u6709\uFF0C\u751A\u81F3\u8FD8\u53EF\u80FD\u4F1A\u5305\u542B\u51E0\u4E2A\u4E0D\u540C\u7EA7\u522B\u7684\u7F16\u8BD1\u5668\u6267\u884C\u5F15\u64CE\u3002\u4F46\u4ECE\u5916\u89C2\u4E0A\u6765\u770B\uFF0C\u6240\u6709 Java \u865A\u62DF\u673A\u7684\u6267\u884C\u5F15\u64CE\u662F\u4E00\u81F4\u7684\uFF1A\u8F93\u5165\u7684\u662F\u5B57\u8282\u7801\u6587\u4EF6\uFF0C\u5904\u7406\u8FC7\u7A0B\u662F\u5B57\u8282\u7801\u89E3\u6790\u7684\u7B49\u6548\u8FC7\u7A0B\uFF0C\u8F93\u51FA\u7684\u662F\u6267\u884C\u7ED3\u679C\u3002</p><h3 id="\u4E00-\u8FD0\u884C\u65F6\u6808\u5E27\u7ED3\u6784" tabindex="-1"><a class="header-anchor" href="#\u4E00-\u8FD0\u884C\u65F6\u6808\u5E27\u7ED3\u6784" aria-hidden="true">#</a> \u4E00. \u8FD0\u884C\u65F6\u6808\u5E27\u7ED3\u6784</h3><p>\u6808\u5E27\uFF08Stack Frame\uFF09\u662F\u7528\u4E8E\u652F\u6301\u865A\u62DF\u673A\u8FDB\u884C\u65B9\u6CD5\u8C03\u7528\u548C\u65B9\u6CD5\u6267\u884C\u7684\u6570\u636E\u7ED3\u6784\uFF0C\u5B83\u662F\u865A\u62DF\u673A\u8FD0\u884C\u65F6\u6570\u636E\u533A\u4E2D\u7684\u865A\u62DF\u673A\u6808\u7684\u6808\u5143\u7D20\u3002\u6808\u5E27\u5B58\u50A8\u4E86\u65B9\u6CD5\u7684\u5C40\u90E8\u53D8\u91CF\u3001\u64CD\u4F5C\u6570\u6808\u3001\u52A8\u6001\u94FE\u63A5\u548C\u65B9\u6CD5\u8FD4\u56DE\u5730\u5740\u7B49\u4FE1\u606F\u3002<strong>\u6BCF\u4E00\u4E2A\u65B9\u6CD5\u4ECE\u8C03\u7528\u5F00\u59CB\u5230\u6267\u884C\u5B8C\u6210\u7684\u8FC7\u7A0B\uFF0C\u90FD\u5BF9\u5E94\u7740\u4E00\u4E2A\u6808\u5E27\u5728\u865A\u62DF\u673A\u6808\u91CC\u4ECE\u5165\u6808\u5230\u51FA\u6808\u7684\u8FC7\u7A0B\u3002</strong></p><p>\u6BCF\u4E00\u4E2A\u6808\u5E27\u90FD\u5305\u62EC\u4E86\u5C40\u90E8\u53D8\u91CF\u8868\u3001\u64CD\u4F5C\u6570\u6808\u3001\u52A8\u6001\u94FE\u63A5\u3001\u65B9\u6CD5\u8FD4\u56DE\u5730\u5740\u548C\u4E00\u4E9B\u989D\u5916\u7684\u9644\u52A0\u4FE1\u606F\u3002\u5728\u7F16\u8BD1\u7A0B\u5E8F\u4EE3\u7801\u65F6\uFF0C\u6808\u5E27\u4E2D\u9700\u8981\u591A\u5927\u7684\u5C40\u90E8\u53D8\u91CF\u8868\uFF0C\u591A\u6DF1\u7684\u64CD\u4F5C\u6570\u6808\u90FD\u5DF2\u7ECF\u5B8C\u5168\u786E\u5B9A\u4E86\uFF0C\u5E76\u4E14\u5199\u5165\u5230\u65B9\u6CD5\u8868\u7684 Code \u5C5E\u6027\u4E4B\u4E2D\uFF0C\u56E0\u6B64\u4E00\u4E2A\u6808\u5E27\u9700\u8981\u5206\u914D\u591A\u5C11\u5185\u5B58\uFF0C\u4E0D\u4F1A\u53D7\u5230\u7A0B\u5E8F\u8FD0\u884C\u671F\u53D8\u91CF\u6570\u636E\u7684\u5F71\u54CD\uFF0C\u800C\u4EC5\u4EC5\u53D6\u51B3\u4E8E\u5177\u4F53\u7684\u865A\u62DF\u673A\u5B9E\u73B0\u3002</p><p>\u4E00\u4E2A\u7EBF\u7A0B\u4E2D\u7684\u65B9\u6CD5\u8C03\u7528\u94FE\u53EF\u80FD\u4F1A\u5F88\u957F\uFF0C\u5F88\u591A\u65B9\u6CD5\u90FD\u5904\u4E8E\u6267\u884C\u72B6\u6001\u3002\u5BF9\u4E8E\u6267\u884C\u5F15\u64CE\u6765\u8BF4\uFF0C\u5728\u6D3B\u52A8\u7EBF\u7A0B\u4E2D\uFF0C\u53EA\u6709\u4F4D\u4E8E\u6808\u9876\u7684\u6808\u5E27\u624D\u662F\u6709\u6548\u7684\uFF0C\u79F0\u4E3A\u5F53\u524D\u6808\u5E27\uFF08Current Stack Frame\uFF09\uFF0C\u4E0E\u8FD9\u4E2A\u6808\u5E27\u76F8\u5173\u8054\u7684\u65B9\u6CD5\u6210\u4E3A\u5F53\u524D\u65B9\u6CD5\u3002\u6267\u884C\u5F15\u64CE\u8FD0\u884C\u7684\u6240\u6709\u5B57\u8282\u7801\u6307\u4EE4\u5BF9\u5F53\u524D\u6808\u5E27\u8FDB\u884C\u64CD\u4F5C\uFF0C\u5728\u6982\u5FF5\u6A21\u578B\u4E0A\uFF0C\u5178\u578B\u7684\u6808\u5E27\u7ED3\u6784\u5982\u4E0B\u56FE\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/how-jvm-run-zijiema-zhiling-a58ee82e-c0b0-4c06-9606-f7a0f0df0de9" alt=""></p><h4 id="\u5C40\u90E8\u53D8\u91CF\u8868" tabindex="-1"><a class="header-anchor" href="#\u5C40\u90E8\u53D8\u91CF\u8868" aria-hidden="true">#</a> \u5C40\u90E8\u53D8\u91CF\u8868</h4><p>\u5C40\u90E8\u53D8\u91CF\u8868\uFF08Local Variables Table\uFF09\u7528\u6765\u4FDD\u5B58\u65B9\u6CD5\u4E2D\u7684\u5C40\u90E8\u53D8\u91CF\uFF0C\u4EE5\u53CA\u65B9\u6CD5\u53C2\u6570\u3002\u5F53 Java \u6E90\u4EE3\u7801\u6587\u4EF6\u88AB\u7F16\u8BD1\u6210 class \u6587\u4EF6\u7684\u65F6\u5019\uFF0C\u5C40\u90E8\u53D8\u91CF\u8868\u7684\u6700\u5927\u5BB9\u91CF\u5C31\u5DF2\u7ECF\u786E\u5B9A\u4E86\u3002</p><p>\u6211\u4EEC\u6765\u770B\u8FD9\u6837\u4E00\u6BB5\u4EE3\u7801\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">LocalVaraiablesTable</span> <span class="token punctuation">{</span>
     <span class="token keyword">private</span> <span class="token keyword">void</span> <span class="token function">write</span><span class="token punctuation">(</span><span class="token keyword">int</span> age<span class="token punctuation">)</span> <span class="token punctuation">{</span>
         <span class="token class-name">String</span> name <span class="token operator">=</span> <span class="token string">&quot;\u6C89\u9ED8\u738B\u4E8C&quot;</span><span class="token punctuation">;</span>
     <span class="token punctuation">}</span>
diff --git a/dist/assets/how-run-java-code.html.5a48d5a6.js b/dist/assets/how-run-java-code.html.5154cace.js
similarity index 99%
rename from dist/assets/how-run-java-code.html.5a48d5a6.js
rename to dist/assets/how-run-java-code.html.5154cace.js
index f7440bcb..cacaa847 100644
--- a/dist/assets/how-run-java-code.html.5a48d5a6.js
+++ b/dist/assets/how-run-java-code.html.5154cace.js
@@ -1,4 +1,4 @@
-import{_ as i}from"./plugin-vue_export-helper.21dcd24c.js";import{r as l,o,c,a as n,b as s,d as e,e as t}from"./app.a0271b9c.js";const r={},p=n("h1",{id:"jvm\u5230\u5E95\u662F\u5982\u4F55\u8FD0\u884Cjava\u4EE3\u7801\u7684",tabindex:"-1"},[n("a",{class:"header-anchor",href:"#jvm\u5230\u5E95\u662F\u5982\u4F55\u8FD0\u884Cjava\u4EE3\u7801\u7684","aria-hidden":"true"},"#"),e(" JVM\u5230\u5E95\u662F\u5982\u4F55\u8FD0\u884CJava\u4EE3\u7801\u7684\uFF1F")],-1),d=e("\u201C\u4E8C\u54E5\uFF0C\u770B\u4E86\u4E0A\u4E00\u7BC7 "),v={href:"https://mp.weixin.qq.com/s/191I_2CVOxVuyfLVtb4jhg",target:"_blank",rel:"noopener noreferrer"},u=e("Hello World"),m=e(" \u7684\u7A0B\u5E8F\u540E\uFF0C\u6211\u5F88\u597D\u5947\uFF0C\u5B83\u662F\u600E\u4E48\u5728 Run \u9762\u677F\u91CC\u6253\u5370\u51FA\u2018\u4E09\u59B9\uFF0C\u5C11\u770B\u624B\u673A\u5C11\u6253\u6E38\u620F\uFF0C\u597D\u597D\u5B66\uFF0C\u7F8E\u7F8E\u54D2\u2019\u5462\uFF1F\u201D\u4E09\u59B9\u54AA\u4E86\u4E00\u53E3\u9EA6\u9999\u53EF\u53EF\u5976\u8336\u540E\u5BF9\u6211\u8BF4\u3002"),b=t(`<p>\u201C\u4E09\u59B9\uFF0C\u6211\u4EEC\u901A\u5E38\u628A Java \u5206\u4E3A\u7F16\u8BD1\u671F\u548C\u8FD0\u884C\u65F6\uFF0C\u5F04\u6E05\u695A\u8FD9\u4E24\u4E2A\u9636\u6BB5\u5C31\u77E5\u9053\u539F\u56E0\u4E86\u3002\u201D</p><p>\u8D34\u4E00\u4E0B HelloWorld \u8FD9\u6BB5\u4EE3\u7801\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token doc-comment comment">/**
+import{_ as i}from"./plugin-vue_export-helper.21dcd24c.js";import{r as l,o,c,a as n,b as s,d as e,e as t}from"./app.615e41d8.js";const r={},p=n("h1",{id:"jvm\u5230\u5E95\u662F\u5982\u4F55\u8FD0\u884Cjava\u4EE3\u7801\u7684",tabindex:"-1"},[n("a",{class:"header-anchor",href:"#jvm\u5230\u5E95\u662F\u5982\u4F55\u8FD0\u884Cjava\u4EE3\u7801\u7684","aria-hidden":"true"},"#"),e(" JVM\u5230\u5E95\u662F\u5982\u4F55\u8FD0\u884CJava\u4EE3\u7801\u7684\uFF1F")],-1),d=e("\u201C\u4E8C\u54E5\uFF0C\u770B\u4E86\u4E0A\u4E00\u7BC7 "),v={href:"https://mp.weixin.qq.com/s/191I_2CVOxVuyfLVtb4jhg",target:"_blank",rel:"noopener noreferrer"},u=e("Hello World"),m=e(" \u7684\u7A0B\u5E8F\u540E\uFF0C\u6211\u5F88\u597D\u5947\uFF0C\u5B83\u662F\u600E\u4E48\u5728 Run \u9762\u677F\u91CC\u6253\u5370\u51FA\u2018\u4E09\u59B9\uFF0C\u5C11\u770B\u624B\u673A\u5C11\u6253\u6E38\u620F\uFF0C\u597D\u597D\u5B66\uFF0C\u7F8E\u7F8E\u54D2\u2019\u5462\uFF1F\u201D\u4E09\u59B9\u54AA\u4E86\u4E00\u53E3\u9EA6\u9999\u53EF\u53EF\u5976\u8336\u540E\u5BF9\u6211\u8BF4\u3002"),b=t(`<p>\u201C\u4E09\u59B9\uFF0C\u6211\u4EEC\u901A\u5E38\u628A Java \u5206\u4E3A\u7F16\u8BD1\u671F\u548C\u8FD0\u884C\u65F6\uFF0C\u5F04\u6E05\u695A\u8FD9\u4E24\u4E2A\u9636\u6BB5\u5C31\u77E5\u9053\u539F\u56E0\u4E86\u3002\u201D</p><p>\u8D34\u4E00\u4E0B HelloWorld \u8FD9\u6BB5\u4EE3\u7801\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token doc-comment comment">/**
  * <span class="token keyword">@author</span> \u5FAE\u4FE1\u641C\u300C\u6C89\u9ED8\u738B\u4E8C\u300D\uFF0C\u56DE\u590D\u5173\u952E\u5B57 PDF
  */</span>
 <span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">HelloWorld</span> <span class="token punctuation">{</span>
diff --git a/dist/assets/hsdb.html.18e11779.js b/dist/assets/hsdb.html.4b8d1063.js
similarity index 99%
rename from dist/assets/hsdb.html.18e11779.js
rename to dist/assets/hsdb.html.4b8d1063.js
index b0a3bee0..0d6d11b9 100644
--- a/dist/assets/hsdb.html.18e11779.js
+++ b/dist/assets/hsdb.html.4b8d1063.js
@@ -1,4 +1,4 @@
-import{_ as a}from"./plugin-vue_export-helper.21dcd24c.js";import{o as t,c as n,e as s}from"./app.a0271b9c.js";const e={},d=s(`<h1 id="hsdb-hotspot-debugger-\u4ECE\u5165\u95E8\u5230\u5B9E\u6218" tabindex="-1"><a class="header-anchor" href="#hsdb-hotspot-debugger-\u4ECE\u5165\u95E8\u5230\u5B9E\u6218" aria-hidden="true">#</a> HSDB\uFF08Hotspot Debugger\uFF09\u4ECE\u5165\u95E8\u5230\u5B9E\u6218</h1><p><code>HSDB\uFF08Hotspot Debugger)</code>\uFF0C\u662F\u4E00\u6B3E\u5185\u7F6E\u4E8E SA \u4E2D\u7684 GUI \u8C03\u8BD5\u5DE5\u5177\uFF0C\u53EF\u7528\u4E8E\u8C03\u8BD5 JVM \u8FD0\u884C\u65F6\u6570\u636E\uFF0C\u4ECE\u800C\u8FDB\u884C\u6545\u969C\u6392\u9664\u3002</p><h2 id="\u542F\u52A8hsdb" tabindex="-1"><a class="header-anchor" href="#\u542F\u52A8hsdb" aria-hidden="true">#</a> \u542F\u52A8HSDB</h2><p>\u68C0\u6D4B\u4E0D\u540C JDK \u7248\u672C\u9700\u8981\u4F7F\u7528\u4E0D\u540C\u7684\xA0<code>HSDB</code>\xA0\u7248\u672C\uFF0C\u5426\u5219\u5BB9\u6613\u51FA\u73B0\u65E0\u6CD5\u626B\u63CF\u5230\u5BF9\u8C61\u7B49\u83AB\u540D\u5176\u5999\u7684\u95EE\u9898</p><ul><li><strong>Mac</strong>\uFF1AJDK7 \u548C JDK8 \u5747\u53EF\u4EE5\u91C7\u7528\u4EE5\u4E0B\u7684\u65B9\u5F0F</li></ul><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>$ sudo java -cp ,:/Library/Java/JavaVirtualMachines/jdk1.7.0_80.jdk/Contents/Home/lib/sa-jdi.jar sun.jvm.hotspot.HSDB
+import{_ as a}from"./plugin-vue_export-helper.21dcd24c.js";import{o as t,c as n,e as s}from"./app.615e41d8.js";const e={},d=s(`<h1 id="hsdb-hotspot-debugger-\u4ECE\u5165\u95E8\u5230\u5B9E\u6218" tabindex="-1"><a class="header-anchor" href="#hsdb-hotspot-debugger-\u4ECE\u5165\u95E8\u5230\u5B9E\u6218" aria-hidden="true">#</a> HSDB\uFF08Hotspot Debugger\uFF09\u4ECE\u5165\u95E8\u5230\u5B9E\u6218</h1><p><code>HSDB\uFF08Hotspot Debugger)</code>\uFF0C\u662F\u4E00\u6B3E\u5185\u7F6E\u4E8E SA \u4E2D\u7684 GUI \u8C03\u8BD5\u5DE5\u5177\uFF0C\u53EF\u7528\u4E8E\u8C03\u8BD5 JVM \u8FD0\u884C\u65F6\u6570\u636E\uFF0C\u4ECE\u800C\u8FDB\u884C\u6545\u969C\u6392\u9664\u3002</p><h2 id="\u542F\u52A8hsdb" tabindex="-1"><a class="header-anchor" href="#\u542F\u52A8hsdb" aria-hidden="true">#</a> \u542F\u52A8HSDB</h2><p>\u68C0\u6D4B\u4E0D\u540C JDK \u7248\u672C\u9700\u8981\u4F7F\u7528\u4E0D\u540C\u7684\xA0<code>HSDB</code>\xA0\u7248\u672C\uFF0C\u5426\u5219\u5BB9\u6613\u51FA\u73B0\u65E0\u6CD5\u626B\u63CF\u5230\u5BF9\u8C61\u7B49\u83AB\u540D\u5176\u5999\u7684\u95EE\u9898</p><ul><li><strong>Mac</strong>\uFF1AJDK7 \u548C JDK8 \u5747\u53EF\u4EE5\u91C7\u7528\u4EE5\u4E0B\u7684\u65B9\u5F0F</li></ul><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>$ sudo java -cp ,:/Library/Java/JavaVirtualMachines/jdk1.7.0_80.jdk/Contents/Home/lib/sa-jdi.jar sun.jvm.hotspot.HSDB
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><blockquote><p>\u4E8B\u5B9E\u4E0A\u7ECF\u8FC7\u6D4B\u8BD5\uFF0C\u5373\u4F7F\u901A\u8FC7 JDK8 \u81EA\u5E26\u7684\xA0<code>sa-jdi.jar</code>\xA0\u53BB\u626B\u63CF\u5BF9\u8C61\uFF08<code>scanoops</code>\uFF09\u7684\u65F6\u5019\u4E5F\u4F1A\u53D1\u751F\u626B\u4E0D\u5230\u7684\u60C5\u51B5\uFF0C\u4F46\u53EF\u4EE5\u901A\u8FC7\u5176\u4ED6\u624B\u6BB5\u4EE3\u66FF</p></blockquote><p>\u800C JDK11 \u7684\u542F\u52A8\u65B9\u5F0F\u6709\u4E9B\u533A\u522B</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>$ /Library/Java/JavaVirtualMachines/jdk-11.0.1.jdk/Contents/Home/bin/jhsdb hsdb
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><blockquote><p>\u4E8B\u5B9E\u4E0A\u7ECF\u8FC7\u6D4B\u8BD5\uFF0C\u8BE5\u7248\u672C\u542F\u52A8\u7684\xA0<code>HSDB</code>\xA0\u4F1A\u5C11\u652F\u6301\u4E00\u4E9B\u6307\u4EE4\uFF08\u6BD4\u5982\xA0<code>mem, whatis</code>\uFF09\uFF0C<strong>\u56E0\u6B64\u76EE\u524D\u4E0D\u63A8\u8350\u4F7F\u7528\u8BE5\u7248\u672C</strong></p></blockquote><ul><li><strong>Windows</strong>:</li></ul><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>$ java -classpath &quot;%JAVA_HOME%/lib/sa-jdi.jar&quot; sun.jvm.hotspot.HSDB
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>\u5176\u4E2D\u542F\u52A8\u7248\u672C\u53EF\u4EE5\u4F7F\u7528\xA0<code>/usr/libexec/java_home -V</code>\xA0\u83B7\u53D6</p><blockquote><p>\u82E5\u9047\u5230 Unable to locate an executable at \u201C/Users/xx/.jenv/versions/1.7/bin/jhsdb\u201D (-1) \u53EF\u901A\u8FC7\xA0<code>Jenv</code>\xA0\u5207\u6362\u5230\u5F53\u524D Jdk \u7248\u672C\u5373\u53EF\u89E3\u51B3</p></blockquote><h2 id="jvm\u53C2\u6570\u8BBE\u7F6E" tabindex="-1"><a class="header-anchor" href="#jvm\u53C2\u6570\u8BBE\u7F6E" aria-hidden="true">#</a> JVM\u53C2\u6570\u8BBE\u7F6E</h2><p><code>HSDB</code>\xA0\u5BF9\xA0<code>Serial GC</code>\xA0\u652F\u6301\u7684\u8F83\u597D\uFF0C\u56E0\u6B64 Debug \u65F6\u589E\u52A0\u53C2\u6570\xA0<code>-XX:+UseSerialGC</code>\uFF0CDebug \u5DE5\u5177\u53EF\u4EE5\u4F7F\u7528 IDE \u6216 JDB</p><h2 id="\u83B7\u53D6\u5E94\u7528\u8FDB\u7A0Bid" tabindex="-1"><a class="header-anchor" href="#\u83B7\u53D6\u5E94\u7528\u8FDB\u7A0Bid" aria-hidden="true">#</a> \u83B7\u53D6\u5E94\u7528\u8FDB\u7A0Bid</h2><p>jps \u4EC5\u67E5\u627E\u5F53\u524D\u7528\u6237\u7684 Java \u8FDB\u7A0B\uFF0C\u800C\u4E0D\u662F\u5F53\u524D\u7CFB\u7EDF\u4E2D\u7684\u6240\u6709\u8FDB\u7A0B</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>$ jps
diff --git a/dist/assets/https-domain.html.86fa1a27.js b/dist/assets/https-domain.html.81185a29.js
similarity index 98%
rename from dist/assets/https-domain.html.86fa1a27.js
rename to dist/assets/https-domain.html.81185a29.js
index 143ad256..a66ccea4 100644
--- a/dist/assets/https-domain.html.86fa1a27.js
+++ b/dist/assets/https-domain.html.81185a29.js
@@ -1,4 +1,4 @@
-import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{r as o,o as i,c as b,a as e,b as a,d as t,e as s}from"./app.a0271b9c.js";const p={},c=t("\u4E0A\u4E00\u6B21\uFF0C\u6211\u4EEC\u5B8C\u6210"),l={href:"https://tobebetterjavaer.com/szjy/buy-domain.html",target:"_blank",rel:"noopener noreferrer"},v=t("\u57DF\u540D\u89E3\u6790"),d=t("\u540E\uFF0C\u53D1\u73B0\u6D4F\u89C8\u5668\u5730\u5740\u680F\u91CC\u7684\u57DF\u540D\u88AB\u63D0\u793A\u4E3A\u4E0D\u5B89\u5168\uFF0C\u5C31\u662F\u56E0\u4E3A\u5B83\u8FD8\u662F\u4E2A\u5B9D\u5B9D\uFF0C\u6CA1\u6709\u4ECE HTTP \u5347\u7EA7\u4E3A HTTPS\u3002"),m=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-https-01.png",alt:""})],-1),h=e("p",null,"\u90A3\u600E\u4E48\u5347\u7EA7\u4E3A HTTPS \u8BC1\u4E66\u5462\uFF1F\u53EF\u4EE5\u76F4\u63A5\u901A\u8FC7\u963F\u91CC\u4E91\u8D2D\u4E70 SSL \u8BC1\u4E66\uFF0C\u4F46\u7279\u4E48\u5DE8\u8D35\uFF01",-1),j=e("p",null,"\u672C\u6765\u60F3\u5C1D\u8BD5\u4E00\u4E0B AWS \u7684\u514D\u8D39 SSL \u8BC1\u4E66\uFF0C\u4F46\u5361\u5230\u9A8C\u8BC1\u7801\u8FD9\u4E00\u6B65\u5C31\u662F\u6536\u4E0D\u5230\u4FE1\u606F\u3002",-1),_=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-https-02.png",alt:""})],-1),g=e("p",null,"\u7D22\u6027\u5C31\u8FD8\u7528 FreeSSL \u5427\u3002",-1),u=e("p",null,"FreeSSL.cn \u662F\u4E00\u4E2A\u63D0\u4F9B\u514D\u8D39HTTPS\u8BC1\u4E66\u7533\u8BF7\u7684\u7F51\u7AD9\uFF0C\u7F51\u5740\u5982\u4E0B\uFF1A",-1),y={href:"https://freessl.cn",target:"_blank",rel:"noopener noreferrer"},S=t("https://freessl.cn"),f=s('<p>\u8F93\u5165\u57DF\u540D tobebetterjavaer.com \u9009\u62E9 trustAsia \u54C1\u724C\u8BC1\u4E66\uFF0C\u70B9\u51FB\u300C\u521B\u5EFA\u300D\uFF0C\u8FD9\u6B21\u6211\u9009\u62E9\u7684\u662F\u4E09\u5E74\u671F\u81EA\u52A8\u5316\uFF08\u521A\u597D\u6211\u7684\u670D\u52A1\u5668\u7533\u8BF7\u7684\u662F\u4E09\u5E74\uFF0C\u57DF\u540D\u4E5F\u662F\u4E09\u5E74\uFF09\uFF0C9.9 \u5143\uFF0C\u8FD8\u662F\u975E\u5E38\u826F\u5FC3\u7684\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-https-03.png" alt=""></p><p>\u5FAE\u4FE1/\u652F\u4ED8\u5B9D\u652F\u4ED8\u5B8C\u6210\u540E\u4F1A\u8DF3\u5230\u8BC1\u4E66\u7684\u8BA2\u5355\u5217\u8868\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-https-04.png" alt=""></p><p>\u9009\u62E9\u300C\u66F4\u591A\u64CD\u4F5C\u300D\u91CC\u7684\u8BA2\u5355\u8BE6\u60C5\uFF0C\u4F1A\u8DF3\u8F6C\u5230 CertCloud \u9875\u7684\u7BA1\u7406\u8BA2\u5355\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-https-05.png" alt=""></p><p>\u70B9\u51FB\u300C\u63D0\u4EA4 CSR\u300D\u540E\u70B9\u51FB\u300C\u63D0\u4EA4\u300D\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-https-06.png" alt=""></p><p>\u63A5\u4E0B\u6765\u5C31\u5230\u4E86\u57DF\u540D\u9A8C\u8BC1\u73AF\u8282\uFF0C\u70B9\u51FB\u300C\u83B7\u53D6\u9A8C\u8BC1\u4FE1\u606F\u300D\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-https-07.png" alt=""></p><p>\u5207\u6362\u5230\u57DF\u540D\u89E3\u6790\u8BBE\u7F6E\u9875\uFF0C\u51C6\u5907\u6DFB\u52A0\u8BB0\u5F55\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-https-08.png" alt=""></p><p>\u6309\u7167 CertCloud \u63D0\u4F9B\u7684\u57DF\u540D\u9A8C\u8BC1\u4FE1\u606F\uFF0C\u6DFB\u52A0\u8BB0\u5F55\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-https-09.png" alt=""></p><p>\u6DFB\u52A0\u5B8C\u6210\u540E\u5207\u6362\u5230 CertCloud\uFF0C\u70B9\u51FB\u300C\u57DF\u540D\u9A8C\u8BC1\u300D\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-https-10.png" alt=""></p><p>\u5982\u679C\u4E0D\u786E\u5B9A\u4E0A\u4E00\u6B65\u7684\u8BB0\u5F55\u662F\u5426\u6DFB\u52A0\u6210\u529F\uFF0C\u53EF\u4EE5\u70B9\u51FB\u300C\u8BCA\u65AD\u300D\u6309\u94AE\u8FDB\u884C\u6D4B\u8BD5\uFF0C\u5982\u679C\u6CA1\u6709\u95EE\u9898\u4F1A\u63D0\u793A\u5339\u914D\u6210\u529F\u7684\u4FE1\u606F\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-https-11.png" alt=""></p><p>\u4E4B\u540E\uFF0C\u70B9\u51FB\u300C\u6211\u5DF2\u5B8C\u6210\u914D\u7F6E\uFF0C\u68C0\u6D4B\u4E00\u4E0B\u300D\uFF0C\u5982\u679C\u6CA1\u6709\u95EE\u9898\uFF0C\u4F1A\u5148\u63D0\u793A\u7B49\u5F85 CA \u9881\u53D1\u8BC1\u4E66\uFF0C\u4E4B\u540E\u518D\u6B21\u68C0\u6D4B\u4F1A\u63D0\u793A\u300C\u8BC1\u4E66\u5DF2\u7B7E\u53D1\uFF0C\u8BF7\u5237\u65B0\u9875\u9762\u67E5\u770B\u300D\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-https-12.png" alt=""></p><p>\u597D\u7684\uFF0C\u76F4\u63A5\u5237\u65B0\u9875\u9762\uFF0C\u53EF\u4EE5\u770B\u5230\u8BA2\u5355\u72B6\u6001\u5DF2\u7ECF\u53D8\u6210\u300C\u5DF2\u7B7E\u53D1\u300D\u7684\u72B6\u6001\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-https-13.png" alt=""></p><p>\u70B9\u51FB\u8BC1\u4E66\u64CD\u4F5C\u4E2D\u7684\u300C\u4E0B\u8F7D\u8BC1\u4E66\u300D\uFF0C\u9009\u62E9\u9002\u7528\u4E8E Nginx \u7684 PEM \u683C\u5F0F\u8BC1\u4E66\uFF0C\u70B9\u51FB\u4E0B\u8F7D\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-https-14.png" alt=""></p>',24),x=t("\u4F7F\u7528 "),z={href:"https://tobebetterjavaer.com/gongju/tabby.html",target:"_blank",rel:"noopener noreferrer"},T=t("Tabby \u7EC8\u7AEF"),k=t("\u7684\u300CSFTP\u300D\u5C06\u8BC1\u4E66\u4E0A\u4F20\u5230\u7F51\u7AD9\u7684\u4E91\u670D\u52A1\u5668\u3002"),H=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-https-15.png",alt:""})],-1),P=t("\u6253\u5F00"),L={href:"https://tobebetterjavaer.com/szjy/install-baota-mianban.html",target:"_blank",rel:"noopener noreferrer"},C=t("\u5B9D\u5854\u9762\u677F"),N=t("\uFF0C\u51C6\u5907\u914D\u7F6E Nginx \u7684 SSL \u8BC1\u4E66\u3002\u5C06\u4EE5\u4E0B\u4FE1\u606F\u590D\u5236\u5230 Nginx \u7684\u914D\u7F6E\u6587\u4EF6\u4E2D\uFF0C\u4FDD\u5B58\u540E\u91CD\u65B0\u52A0\u8F7D\u914D\u7F6E\u3002"),w=s(`<div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code># HTTPS server
+import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{r as o,o as i,c as b,a as e,b as a,d as t,e as s}from"./app.615e41d8.js";const p={},c=t("\u4E0A\u4E00\u6B21\uFF0C\u6211\u4EEC\u5B8C\u6210"),l={href:"https://tobebetterjavaer.com/szjy/buy-domain.html",target:"_blank",rel:"noopener noreferrer"},v=t("\u57DF\u540D\u89E3\u6790"),d=t("\u540E\uFF0C\u53D1\u73B0\u6D4F\u89C8\u5668\u5730\u5740\u680F\u91CC\u7684\u57DF\u540D\u88AB\u63D0\u793A\u4E3A\u4E0D\u5B89\u5168\uFF0C\u5C31\u662F\u56E0\u4E3A\u5B83\u8FD8\u662F\u4E2A\u5B9D\u5B9D\uFF0C\u6CA1\u6709\u4ECE HTTP \u5347\u7EA7\u4E3A HTTPS\u3002"),m=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-https-01.png",alt:""})],-1),h=e("p",null,"\u90A3\u600E\u4E48\u5347\u7EA7\u4E3A HTTPS \u8BC1\u4E66\u5462\uFF1F\u53EF\u4EE5\u76F4\u63A5\u901A\u8FC7\u963F\u91CC\u4E91\u8D2D\u4E70 SSL \u8BC1\u4E66\uFF0C\u4F46\u7279\u4E48\u5DE8\u8D35\uFF01",-1),j=e("p",null,"\u672C\u6765\u60F3\u5C1D\u8BD5\u4E00\u4E0B AWS \u7684\u514D\u8D39 SSL \u8BC1\u4E66\uFF0C\u4F46\u5361\u5230\u9A8C\u8BC1\u7801\u8FD9\u4E00\u6B65\u5C31\u662F\u6536\u4E0D\u5230\u4FE1\u606F\u3002",-1),_=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-https-02.png",alt:""})],-1),g=e("p",null,"\u7D22\u6027\u5C31\u8FD8\u7528 FreeSSL \u5427\u3002",-1),u=e("p",null,"FreeSSL.cn \u662F\u4E00\u4E2A\u63D0\u4F9B\u514D\u8D39HTTPS\u8BC1\u4E66\u7533\u8BF7\u7684\u7F51\u7AD9\uFF0C\u7F51\u5740\u5982\u4E0B\uFF1A",-1),y={href:"https://freessl.cn",target:"_blank",rel:"noopener noreferrer"},S=t("https://freessl.cn"),f=s('<p>\u8F93\u5165\u57DF\u540D tobebetterjavaer.com \u9009\u62E9 trustAsia \u54C1\u724C\u8BC1\u4E66\uFF0C\u70B9\u51FB\u300C\u521B\u5EFA\u300D\uFF0C\u8FD9\u6B21\u6211\u9009\u62E9\u7684\u662F\u4E09\u5E74\u671F\u81EA\u52A8\u5316\uFF08\u521A\u597D\u6211\u7684\u670D\u52A1\u5668\u7533\u8BF7\u7684\u662F\u4E09\u5E74\uFF0C\u57DF\u540D\u4E5F\u662F\u4E09\u5E74\uFF09\uFF0C9.9 \u5143\uFF0C\u8FD8\u662F\u975E\u5E38\u826F\u5FC3\u7684\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-https-03.png" alt=""></p><p>\u5FAE\u4FE1/\u652F\u4ED8\u5B9D\u652F\u4ED8\u5B8C\u6210\u540E\u4F1A\u8DF3\u5230\u8BC1\u4E66\u7684\u8BA2\u5355\u5217\u8868\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-https-04.png" alt=""></p><p>\u9009\u62E9\u300C\u66F4\u591A\u64CD\u4F5C\u300D\u91CC\u7684\u8BA2\u5355\u8BE6\u60C5\uFF0C\u4F1A\u8DF3\u8F6C\u5230 CertCloud \u9875\u7684\u7BA1\u7406\u8BA2\u5355\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-https-05.png" alt=""></p><p>\u70B9\u51FB\u300C\u63D0\u4EA4 CSR\u300D\u540E\u70B9\u51FB\u300C\u63D0\u4EA4\u300D\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-https-06.png" alt=""></p><p>\u63A5\u4E0B\u6765\u5C31\u5230\u4E86\u57DF\u540D\u9A8C\u8BC1\u73AF\u8282\uFF0C\u70B9\u51FB\u300C\u83B7\u53D6\u9A8C\u8BC1\u4FE1\u606F\u300D\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-https-07.png" alt=""></p><p>\u5207\u6362\u5230\u57DF\u540D\u89E3\u6790\u8BBE\u7F6E\u9875\uFF0C\u51C6\u5907\u6DFB\u52A0\u8BB0\u5F55\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-https-08.png" alt=""></p><p>\u6309\u7167 CertCloud \u63D0\u4F9B\u7684\u57DF\u540D\u9A8C\u8BC1\u4FE1\u606F\uFF0C\u6DFB\u52A0\u8BB0\u5F55\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-https-09.png" alt=""></p><p>\u6DFB\u52A0\u5B8C\u6210\u540E\u5207\u6362\u5230 CertCloud\uFF0C\u70B9\u51FB\u300C\u57DF\u540D\u9A8C\u8BC1\u300D\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-https-10.png" alt=""></p><p>\u5982\u679C\u4E0D\u786E\u5B9A\u4E0A\u4E00\u6B65\u7684\u8BB0\u5F55\u662F\u5426\u6DFB\u52A0\u6210\u529F\uFF0C\u53EF\u4EE5\u70B9\u51FB\u300C\u8BCA\u65AD\u300D\u6309\u94AE\u8FDB\u884C\u6D4B\u8BD5\uFF0C\u5982\u679C\u6CA1\u6709\u95EE\u9898\u4F1A\u63D0\u793A\u5339\u914D\u6210\u529F\u7684\u4FE1\u606F\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-https-11.png" alt=""></p><p>\u4E4B\u540E\uFF0C\u70B9\u51FB\u300C\u6211\u5DF2\u5B8C\u6210\u914D\u7F6E\uFF0C\u68C0\u6D4B\u4E00\u4E0B\u300D\uFF0C\u5982\u679C\u6CA1\u6709\u95EE\u9898\uFF0C\u4F1A\u5148\u63D0\u793A\u7B49\u5F85 CA \u9881\u53D1\u8BC1\u4E66\uFF0C\u4E4B\u540E\u518D\u6B21\u68C0\u6D4B\u4F1A\u63D0\u793A\u300C\u8BC1\u4E66\u5DF2\u7B7E\u53D1\uFF0C\u8BF7\u5237\u65B0\u9875\u9762\u67E5\u770B\u300D\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-https-12.png" alt=""></p><p>\u597D\u7684\uFF0C\u76F4\u63A5\u5237\u65B0\u9875\u9762\uFF0C\u53EF\u4EE5\u770B\u5230\u8BA2\u5355\u72B6\u6001\u5DF2\u7ECF\u53D8\u6210\u300C\u5DF2\u7B7E\u53D1\u300D\u7684\u72B6\u6001\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-https-13.png" alt=""></p><p>\u70B9\u51FB\u8BC1\u4E66\u64CD\u4F5C\u4E2D\u7684\u300C\u4E0B\u8F7D\u8BC1\u4E66\u300D\uFF0C\u9009\u62E9\u9002\u7528\u4E8E Nginx \u7684 PEM \u683C\u5F0F\u8BC1\u4E66\uFF0C\u70B9\u51FB\u4E0B\u8F7D\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-https-14.png" alt=""></p>',24),x=t("\u4F7F\u7528 "),z={href:"https://tobebetterjavaer.com/gongju/tabby.html",target:"_blank",rel:"noopener noreferrer"},T=t("Tabby \u7EC8\u7AEF"),k=t("\u7684\u300CSFTP\u300D\u5C06\u8BC1\u4E66\u4E0A\u4F20\u5230\u7F51\u7AD9\u7684\u4E91\u670D\u52A1\u5668\u3002"),H=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-https-15.png",alt:""})],-1),P=t("\u6253\u5F00"),L={href:"https://tobebetterjavaer.com/szjy/install-baota-mianban.html",target:"_blank",rel:"noopener noreferrer"},C=t("\u5B9D\u5854\u9762\u677F"),N=t("\uFF0C\u51C6\u5907\u914D\u7F6E Nginx \u7684 SSL \u8BC1\u4E66\u3002\u5C06\u4EE5\u4E0B\u4FE1\u606F\u590D\u5236\u5230 Nginx \u7684\u914D\u7F6E\u6587\u4EF6\u4E2D\uFF0C\u4FDD\u5B58\u540E\u91CD\u65B0\u52A0\u8F7D\u914D\u7F6E\u3002"),w=s(`<div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code># HTTPS server
 
 server {
     listen       443 ssl;
diff --git a/dist/assets/hutool.html.3a80c8b8.js b/dist/assets/hutool.html.5bf70ca7.js
similarity index 99%
rename from dist/assets/hutool.html.3a80c8b8.js
rename to dist/assets/hutool.html.5bf70ca7.js
index 98382589..fc7b997e 100644
--- a/dist/assets/hutool.html.3a80c8b8.js
+++ b/dist/assets/hutool.html.5bf70ca7.js
@@ -1,4 +1,4 @@
-import{_ as t}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o as e,c as o,a as n,b as c,e as l,d as s}from"./app.a0271b9c.js";const i={},u=l(`<h1 id="hutool-\u56FD\u4EA7\u826F\u5FC3\u5DE5\u5177\u5305-\u8BA9\u4F60\u7684java\u53D8\u5F97\u66F4\u751C" tabindex="-1"><a class="header-anchor" href="#hutool-\u56FD\u4EA7\u826F\u5FC3\u5DE5\u5177\u5305-\u8BA9\u4F60\u7684java\u53D8\u5F97\u66F4\u751C" aria-hidden="true">#</a> Hutool\uFF1A\u56FD\u4EA7\u826F\u5FC3\u5DE5\u5177\u5305\uFF0C\u8BA9\u4F60\u7684Java\u53D8\u5F97\u66F4\u751C</h1><p>\u8BFB\u8005\u7FA4\u91CC\u6709\u4E2A\u5C0F\u4F19\u4F34\u611F\u6168\u8BF4\uFF0C\u201CHutool \u8FD9\u6B3E\u5F00\u6E90\u7C7B\u5E93\u592A\u5389\u5BB3\u4E86\uFF0C\u57FA\u672C\u4E0A\u8BE5\u6709\u8BE5\u7684\u5DE5\u5177\u7C7B\uFF0C\u5B83\u91CC\u9762\u90FD\u6709\u3002\u201D\u8BB2\u771F\u7684\uFF0C\u6211\u5E73\u5E38\u5DE5\u4F5C\u4E2D\u4E5F\u7ECF\u5E38\u7528 Hutool\uFF0C\u5B83\u786E\u5B9E\u53EF\u4EE5\u5E2E\u52A9\u6211\u4EEC\u7B80\u5316\u6BCF\u4E00\u884C\u4EE3\u7801\uFF0C\u4F7F Java \u62E5\u6709\u51FD\u6570\u5F0F\u8BED\u8A00\u822C\u7684\u4F18\u96C5\uFF0C\u8BA9 Java \u8BED\u8A00\u53D8\u5F97\u201C\u751C\u751C\u7684\u201D\u3002</p><p>Hutool \u7684\u4F5C\u8005\u5728\u5B98\u7F51\u4E0A\u8BF4\uFF0CHutool \u662F Hu+tool \u7684\u81EA\u9020\u8BCD\uFF08\u597D\u50CF\u4E0D\u7528\u8BF4\uFF0C\u6211\u4EEC\u4E5F\u80FD\u731C\u5F97\u5230\uFF09\uFF0C\u201CHu\u201D\u7528\u6765\u81F4\u656C\u4ED6\u7684\u201C\u524D\u4EFB\u201D\u516C\u53F8\uFF0C\u201Ctool\u201D\u5C31\u662F\u5DE5\u5177\u7684\u610F\u601D\uFF0C\u8C10\u97F3\u5C31\u6709\u610F\u601D\u4E86\uFF0C\u201C\u7CCA\u6D82\u201D\uFF0C\u5BD3\u610F\u8FFD\u6C42\u201C\u4E07\u4E8B\u90FD\u4F5C\u7CCA\u6D82\u89C2\uFF0C\u65E0\u6240\u8C13\u5931\uFF0C\u65E0\u6240\u8C13\u5F97\u201D\uFF08\u4E00\u4E2A\u5F00\u6E90\u7C7B\u5E93\uFF0C\u4E0A\u5347\u5230\u4E86\u54F2\u5B66\u7684\u9AD8\u5EA6\uFF0C\u4F5C\u8005\u5389\u5BB3\u4E86\uFF09\u3002</p><p>\u770B\u4E86\u4E00\u4E0B\u5F00\u53D1\u56E2\u961F\u7684\u4E00\u4E2A\u6210\u5458\u4ECB\u7ECD\uFF0C\u4E00\u4E2A Java \u540E\u7AEF\u5DE5\u5177\u7684\u4F5C\u8005\u7ADF\u7136\u7231\u524D\u7AEF\u3001\u7231\u6570\u7801\uFF0C\u7231\u7F8E\u5973\uFF0C\u55EF\u55EF\u55EF\uFF0C\u786E\u5B9E\u201C\u96BE\u5F97\u7CCA\u6D82\u201D\uFF08\u624B\u52A8\u72D7\u5934\uFF09\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/common-tool/hutool-01.png" alt=""></p><p>\u5E9F\u8BDD\u5C31\u8BF4\u5230\u8FD9\uFF0C\u6765\u5427\uFF0C\u5B9E\u64CD\u8D70\u8D77\uFF01</p><h3 id="_01\u3001\u5F15\u5165-hutool" tabindex="-1"><a class="header-anchor" href="#_01\u3001\u5F15\u5165-hutool" aria-hidden="true">#</a> 01\u3001\u5F15\u5165 Hutool</h3><p>Maven \u9879\u76EE\u53EA\u9700\u8981\u5728 pom.xml \u6587\u4EF6\u4E2D\u6DFB\u52A0\u4EE5\u4E0B\u4F9D\u8D56\u5373\u53EF\u3002</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
+import{_ as t}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o as e,c as o,a as n,b as c,e as l,d as s}from"./app.615e41d8.js";const i={},u=l(`<h1 id="hutool-\u56FD\u4EA7\u826F\u5FC3\u5DE5\u5177\u5305-\u8BA9\u4F60\u7684java\u53D8\u5F97\u66F4\u751C" tabindex="-1"><a class="header-anchor" href="#hutool-\u56FD\u4EA7\u826F\u5FC3\u5DE5\u5177\u5305-\u8BA9\u4F60\u7684java\u53D8\u5F97\u66F4\u751C" aria-hidden="true">#</a> Hutool\uFF1A\u56FD\u4EA7\u826F\u5FC3\u5DE5\u5177\u5305\uFF0C\u8BA9\u4F60\u7684Java\u53D8\u5F97\u66F4\u751C</h1><p>\u8BFB\u8005\u7FA4\u91CC\u6709\u4E2A\u5C0F\u4F19\u4F34\u611F\u6168\u8BF4\uFF0C\u201CHutool \u8FD9\u6B3E\u5F00\u6E90\u7C7B\u5E93\u592A\u5389\u5BB3\u4E86\uFF0C\u57FA\u672C\u4E0A\u8BE5\u6709\u8BE5\u7684\u5DE5\u5177\u7C7B\uFF0C\u5B83\u91CC\u9762\u90FD\u6709\u3002\u201D\u8BB2\u771F\u7684\uFF0C\u6211\u5E73\u5E38\u5DE5\u4F5C\u4E2D\u4E5F\u7ECF\u5E38\u7528 Hutool\uFF0C\u5B83\u786E\u5B9E\u53EF\u4EE5\u5E2E\u52A9\u6211\u4EEC\u7B80\u5316\u6BCF\u4E00\u884C\u4EE3\u7801\uFF0C\u4F7F Java \u62E5\u6709\u51FD\u6570\u5F0F\u8BED\u8A00\u822C\u7684\u4F18\u96C5\uFF0C\u8BA9 Java \u8BED\u8A00\u53D8\u5F97\u201C\u751C\u751C\u7684\u201D\u3002</p><p>Hutool \u7684\u4F5C\u8005\u5728\u5B98\u7F51\u4E0A\u8BF4\uFF0CHutool \u662F Hu+tool \u7684\u81EA\u9020\u8BCD\uFF08\u597D\u50CF\u4E0D\u7528\u8BF4\uFF0C\u6211\u4EEC\u4E5F\u80FD\u731C\u5F97\u5230\uFF09\uFF0C\u201CHu\u201D\u7528\u6765\u81F4\u656C\u4ED6\u7684\u201C\u524D\u4EFB\u201D\u516C\u53F8\uFF0C\u201Ctool\u201D\u5C31\u662F\u5DE5\u5177\u7684\u610F\u601D\uFF0C\u8C10\u97F3\u5C31\u6709\u610F\u601D\u4E86\uFF0C\u201C\u7CCA\u6D82\u201D\uFF0C\u5BD3\u610F\u8FFD\u6C42\u201C\u4E07\u4E8B\u90FD\u4F5C\u7CCA\u6D82\u89C2\uFF0C\u65E0\u6240\u8C13\u5931\uFF0C\u65E0\u6240\u8C13\u5F97\u201D\uFF08\u4E00\u4E2A\u5F00\u6E90\u7C7B\u5E93\uFF0C\u4E0A\u5347\u5230\u4E86\u54F2\u5B66\u7684\u9AD8\u5EA6\uFF0C\u4F5C\u8005\u5389\u5BB3\u4E86\uFF09\u3002</p><p>\u770B\u4E86\u4E00\u4E0B\u5F00\u53D1\u56E2\u961F\u7684\u4E00\u4E2A\u6210\u5458\u4ECB\u7ECD\uFF0C\u4E00\u4E2A Java \u540E\u7AEF\u5DE5\u5177\u7684\u4F5C\u8005\u7ADF\u7136\u7231\u524D\u7AEF\u3001\u7231\u6570\u7801\uFF0C\u7231\u7F8E\u5973\uFF0C\u55EF\u55EF\u55EF\uFF0C\u786E\u5B9E\u201C\u96BE\u5F97\u7CCA\u6D82\u201D\uFF08\u624B\u52A8\u72D7\u5934\uFF09\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/common-tool/hutool-01.png" alt=""></p><p>\u5E9F\u8BDD\u5C31\u8BF4\u5230\u8FD9\uFF0C\u6765\u5427\uFF0C\u5B9E\u64CD\u8D70\u8D77\uFF01</p><h3 id="_01\u3001\u5F15\u5165-hutool" tabindex="-1"><a class="header-anchor" href="#_01\u3001\u5F15\u5165-hutool" aria-hidden="true">#</a> 01\u3001\u5F15\u5165 Hutool</h3><p>Maven \u9879\u76EE\u53EA\u9700\u8981\u5728 pom.xml \u6587\u4EF6\u4E2D\u6DFB\u52A0\u4EE5\u4E0B\u4F9D\u8D56\u5373\u53EF\u3002</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
     &lt;groupId&gt;cn.hutool&lt;/groupId&gt;
     &lt;artifactId&gt;hutool-all&lt;/artifactId&gt;
     &lt;version&gt;5.4.3&lt;/version&gt;
diff --git a/dist/assets/image-yasuo.html.d1e70eaf.js b/dist/assets/image-yasuo.html.0e3ff54c.js
similarity index 99%
rename from dist/assets/image-yasuo.html.d1e70eaf.js
rename to dist/assets/image-yasuo.html.0e3ff54c.js
index 4da3fe81..ad558fd9 100644
--- a/dist/assets/image-yasuo.html.d1e70eaf.js
+++ b/dist/assets/image-yasuo.html.0e3ff54c.js
@@ -1,4 +1,4 @@
-import{_ as t}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o,c,a,b as e,e as i,d as n}from"./app.a0271b9c.js";const l={},u=i(`<p>\u5766\u767D\u4ECE\u5BBD\u5427\uFF0C\u6211\u5C31\u662F\u90A3\u4E2A\u82B1\u4E86\u4E24\u5929\u4E24\u591C\u628A 1M \u56FE\u7247\u4F18\u5316\u5230 100kb \u7684\u5BB6\u4F19\u2014\u2014\u738B\u5C0F\u4E8C\uFF01</p><p>\u81EA\u4ECE\u56E0\u4E3A\u4E00\u7BC7\u62A5\u9053\u767B\u4E0A\u70ED\u641C\u540E\uFF0C\u6211\u5DEE\u70B9\u6291\u90C1\uFF0C\u6BCF\u5929\u8981\u9760 50 \u7247\u5B89\u7720\u836F\u624D\u80FD\u5165\u7761\u3002</p><p>\u7F51\u7EDC\u4E0A\u66DD\u5149\u7684\u90A3\u4E9B\u5173\u4E8E\u4E00\u7801\u901A\u7684\u6D88\u606F\uFF0C\u6709\u771F\u6709\u5047\uFF0C\u6211\u8FD9\u91CC\u5C31\u4E0D\u518D\u6F84\u6E05\u4E86\u3002\u5C31\u8BF4\u8BF4\u6211\u662F\u600E\u4E48\u628A\u56FE\u7247\u4ECE 1M \u4F18\u5316\u5230 100kb \u7684\u6545\u4E8B\u5427\u3002</p><p>\u662F\u7684\uFF0C\u7531\u4E8E\u7CFB\u7EDF\u7FA4\u4F53\u89C4\u6A21\u548C\u8BBF\u95EE\u89C4\u6A21\u7684\u7279\u6B8A\u6027\uFF0C\u6BCF\u4E00\u884C\u4EE3\u7801\u3001\u6BCF\u4E00\u5F20\u56FE\u7247\u3001\u6BCF\u4E00\u4E2A\u6280\u672F\u6587\u6863\u90FD\u53CD\u590D\u6838\u51C6\uFF0C\u4F18\u5316\u518D\u4F18\u5316\uFF0C\u7CBE\u76CA\u6C42\u7CBE\u3002\u4E3A\u786E\u4FDD\u7CFB\u7EDF\u8FD0\u884C\u5F97\u66F4\u9AD8\u6548\uFF0C\u6211\u4EEC\u5C06\u4E00\u5F20\u56FE\u7247\u4ECE1MB\u538B\u7F29\u5230500KB\uFF0C\u518D\u4ECE500KB\u4F18\u5316\u5230100KB\u3002</p><p>\u8FD9\u6837\u7684\u5DE5\u4F5C\u5728\u5916\u4EBA\u770B\u8D77\u6765\uFF0C\u7B80\u5355\u5230\u5C31\u597D\u50CF\u6084\u6084\u7ED9\u5B66\u59B9\u585E\u4E00\u5F20\u60C5\u4E66\u5C31\u80FD\u8BA9\u5979\u505A\u6211\u5973\u670B\u53CB\u4E00\u6837\u7B80\u5355\u3002</p><p>\u4F46\u6B8A\u4E0D\u77E5\uFF0C\u8FD9\u5176\u4E2D\u8574\u542B\u7740\u6781\u9AD8\u7684\u6280\u672F\u542B\u91CF\uFF01</p><p>\u4E0D\u4FE1\uFF0C\u6211\u7ED9\u4F60\u4EEC\u666E\u53CA\u4E0B\u3002</p><h3 id="\u4E00\u3001\u56FE\u50CF\u538B\u7F29" tabindex="-1"><a class="header-anchor" href="#\u4E00\u3001\u56FE\u50CF\u538B\u7F29" aria-hidden="true">#</a> \u4E00\u3001\u56FE\u50CF\u538B\u7F29</h3><p>\u56FE\u50CF\u538B\u7F29\u662F\u6570\u636E\u538B\u7F29\u6280\u672F\u5728\u6570\u5B57\u56FE\u50CF\u4E0A\u7684\u5E94\u7528\uFF0C\u76EE\u7684\u662F\u51CF\u5C11\u56FE\u50CF\u6570\u636E\u4E2D\u7684\u5197\u4F59\u4FE1\u606F\uFF0C\u4ECE\u800C\u7528\u66F4\u52A0\u9AD8\u6548\u7684\u683C\u5F0F\u5B58\u50A8\u548C\u4F20\u8F93\u6570\u636E\u3002</p><p>\u56FE\u50CF\u538B\u7F29\u53EF\u4EE5\u662F\u6709\u635F\u6570\u636E\u538B\u7F29\uFF0C\u4E5F\u53EF\u4EE5\u662F\u65E0\u635F\u6570\u636E\u538B\u7F29\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/shigu/image-yasuo-1.png" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/shigu/image-yasuo-2.png" alt=""></p><p>\u600E\u4E48\u6837\uFF1F</p><p>\u662F\u4E0D\u662F\u611F\u89C9\u56FE\u50CF\u538B\u7F29\u6280\u672F\u6CA1\u6709\u60F3\u8C61\u4E2D\u90A3\u4E48\u7B80\u5355\u4E86\uFF1F</p><p>\u66F4\u591A\u5173\u4E8E\u56FE\u50CF\u538B\u7F29\u7684\u8D44\u6599\u53EF\u53C2\u8003\u4EE5\u4E0B\u94FE\u63A5\u3002</p><blockquote><p>\u673A\u5668\u4E4B\u5FC3\uFF1Ahttps://www.jiqizhixin.com/graph/technologies/08b2b25e-21a0-48e1-9de8-f91d424adfe1</p></blockquote><h3 id="\u4E8C\u3001java\u6570\u5B57\u56FE\u50CF\u5904\u7406" tabindex="-1"><a class="header-anchor" href="#\u4E8C\u3001java\u6570\u5B57\u56FE\u50CF\u5904\u7406" aria-hidden="true">#</a> \u4E8C\u3001Java\u6570\u5B57\u56FE\u50CF\u5904\u7406</h3><p>\u4F5C\u4E3A\u8FD9\u6B21\u201C20 \u591A\u4E07\u5916\u5305\u9879\u76EE\u201D\u7684\u201C\u4E3B\u529B\u5F00\u53D1\u4EBA\u5458\u201D\uFF0C\u6211\u8FD9\u91CC\u5C31\u7ED9\u5927\u5BB6\u4ECB\u7ECD\u4E0B Java \u6570\u5B57\u56FE\u50CF\u5904\u7406\u6280\u672F\u5427\uFF0C\u4E00\u5F00\u59CB\u6211\u5C31\u662F\u7528\u5B83\u6765\u5904\u7406\u56FE\u7247\u7684\u3002</p><p>\u6570\u5B57\u56FE\u50CF\u5904\u7406\uFF08Digital Image Processing\uFF09\u662F\u901A\u8FC7\u8BA1\u7B97\u673A\u5BF9\u56FE\u50CF\u8FDB\u884C\u53BB\u9664\u566A\u58F0\u3001\u589E\u5F3A\u3001\u590D\u539F\u3001\u5206\u5272\u3001\u63D0\u53D6\u7279\u5F81\u7B49\u5904\u7406\u7684\u65B9\u6CD5\u548C\u6280\u672F\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/shigu/image-yasuo-3.png" alt=""></p><p>\u8F93\u5165\u7684\u662F\u56FE\u50CF\u4FE1\u53F7\uFF0C\u7136\u540E\u7ECF\u8FC7 DIP \u8FDB\u884C\u6709\u6548\u7684\u7B97\u6CD5\u5904\u7406\u540E\uFF0C\u8F93\u51FA\u4E3A\u6570\u5B57\u4FE1\u53F7\u3002</p><p>\u4E3A\u4E86\u538B\u7F29\u56FE\u50CF\uFF0C\u6211\u4EEC\u9700\u8981\u8BFB\u53D6\u56FE\u50CF\u5E76\u5C06\u5176\u8F6C\u6362\u6210 BufferedImage \u5BF9\u8C61\uFF0CBufferedImage \u662F Image \u7C7B\u7684\u4E00\u4E2A\u5B50\u7C7B\uFF0C\u63CF\u8FF0\u4E86\u4E00\u4E2A\u5177\u6709\u53EF\u8BBF\u95EE\u7684\u56FE\u50CF\u6570\u636E\u7F13\u51B2\u533A\uFF0C\u7531 ColorModel \u548C Raster \u7684\u56FE\u50CF\u6570\u636E\u7EC4\u6210\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/shigu/image-yasuo-4.png" alt=""></p><p>\u5E9F\u8BDD\u6211\u5C31\u4E0D\u591A\u8BF4\u4E86\uFF0C\u76F4\u63A5\u8FDB\u5165\u5B9E\u6218\u5427\uFF01</p><h3 id="\u4E09\u3001\u56FE\u50CF\u538B\u7F29\u5B9E\u6218" tabindex="-1"><a class="header-anchor" href="#\u4E09\u3001\u56FE\u50CF\u538B\u7F29\u5B9E\u6218" aria-hidden="true">#</a> \u4E09\u3001\u56FE\u50CF\u538B\u7F29\u5B9E\u6218</h3><p>\u521A\u597D\u6211\u672C\u5730\u6709\u4E00\u5F20\u4E4B\u524D\u7528\u8FC7\u7684\u5C01\u9762\u56FE\uFF0C\u79BB 1M \u53EA\u5DEE 236 KB\uFF0C\u53EF\u4EE5\u62FF\u6765\u4F5C\u4E3A\u6D4B\u8BD5\u7528\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/shigu/image-yasuo-5.png" alt=""></p><p>\u8FD9\u5176\u4E2D\u8981\u7528\u5230 ImageIO \u7C7B\uFF0C\u8FD9\u662F\u4E00\u4E2A\u9759\u6001\u7C7B\uFF0C\u63D0\u4F9B\u4E86\u4E00\u7CFB\u5217\u65B9\u6CD5\u7528\u6765\u8BFB\u548C\u5199\u56FE\u50CF\uFF0C\u540C\u65F6\u8FD8\u53EF\u4EE5\u5BF9\u56FE\u50CF\u8FDB\u884C\u7B80\u5355\u7684\u7F16\u7801\u548C\u89E3\u7801\u3002</p><p>\u6BD4\u5982\u8BF4\u901A\u8FC7 <code>ImageIO.read()</code> \u53EF\u4EE5\u5C06\u56FE\u50CF\u8BFB\u53D6\u5230 BufferedImage \u5BF9\u8C61\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">File</span> input <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">File</span><span class="token punctuation">(</span><span class="token string">&quot;ceshi.jpg&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
+import{_ as t}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o,c,a,b as e,e as i,d as n}from"./app.615e41d8.js";const l={},u=i(`<p>\u5766\u767D\u4ECE\u5BBD\u5427\uFF0C\u6211\u5C31\u662F\u90A3\u4E2A\u82B1\u4E86\u4E24\u5929\u4E24\u591C\u628A 1M \u56FE\u7247\u4F18\u5316\u5230 100kb \u7684\u5BB6\u4F19\u2014\u2014\u738B\u5C0F\u4E8C\uFF01</p><p>\u81EA\u4ECE\u56E0\u4E3A\u4E00\u7BC7\u62A5\u9053\u767B\u4E0A\u70ED\u641C\u540E\uFF0C\u6211\u5DEE\u70B9\u6291\u90C1\uFF0C\u6BCF\u5929\u8981\u9760 50 \u7247\u5B89\u7720\u836F\u624D\u80FD\u5165\u7761\u3002</p><p>\u7F51\u7EDC\u4E0A\u66DD\u5149\u7684\u90A3\u4E9B\u5173\u4E8E\u4E00\u7801\u901A\u7684\u6D88\u606F\uFF0C\u6709\u771F\u6709\u5047\uFF0C\u6211\u8FD9\u91CC\u5C31\u4E0D\u518D\u6F84\u6E05\u4E86\u3002\u5C31\u8BF4\u8BF4\u6211\u662F\u600E\u4E48\u628A\u56FE\u7247\u4ECE 1M \u4F18\u5316\u5230 100kb \u7684\u6545\u4E8B\u5427\u3002</p><p>\u662F\u7684\uFF0C\u7531\u4E8E\u7CFB\u7EDF\u7FA4\u4F53\u89C4\u6A21\u548C\u8BBF\u95EE\u89C4\u6A21\u7684\u7279\u6B8A\u6027\uFF0C\u6BCF\u4E00\u884C\u4EE3\u7801\u3001\u6BCF\u4E00\u5F20\u56FE\u7247\u3001\u6BCF\u4E00\u4E2A\u6280\u672F\u6587\u6863\u90FD\u53CD\u590D\u6838\u51C6\uFF0C\u4F18\u5316\u518D\u4F18\u5316\uFF0C\u7CBE\u76CA\u6C42\u7CBE\u3002\u4E3A\u786E\u4FDD\u7CFB\u7EDF\u8FD0\u884C\u5F97\u66F4\u9AD8\u6548\uFF0C\u6211\u4EEC\u5C06\u4E00\u5F20\u56FE\u7247\u4ECE1MB\u538B\u7F29\u5230500KB\uFF0C\u518D\u4ECE500KB\u4F18\u5316\u5230100KB\u3002</p><p>\u8FD9\u6837\u7684\u5DE5\u4F5C\u5728\u5916\u4EBA\u770B\u8D77\u6765\uFF0C\u7B80\u5355\u5230\u5C31\u597D\u50CF\u6084\u6084\u7ED9\u5B66\u59B9\u585E\u4E00\u5F20\u60C5\u4E66\u5C31\u80FD\u8BA9\u5979\u505A\u6211\u5973\u670B\u53CB\u4E00\u6837\u7B80\u5355\u3002</p><p>\u4F46\u6B8A\u4E0D\u77E5\uFF0C\u8FD9\u5176\u4E2D\u8574\u542B\u7740\u6781\u9AD8\u7684\u6280\u672F\u542B\u91CF\uFF01</p><p>\u4E0D\u4FE1\uFF0C\u6211\u7ED9\u4F60\u4EEC\u666E\u53CA\u4E0B\u3002</p><h3 id="\u4E00\u3001\u56FE\u50CF\u538B\u7F29" tabindex="-1"><a class="header-anchor" href="#\u4E00\u3001\u56FE\u50CF\u538B\u7F29" aria-hidden="true">#</a> \u4E00\u3001\u56FE\u50CF\u538B\u7F29</h3><p>\u56FE\u50CF\u538B\u7F29\u662F\u6570\u636E\u538B\u7F29\u6280\u672F\u5728\u6570\u5B57\u56FE\u50CF\u4E0A\u7684\u5E94\u7528\uFF0C\u76EE\u7684\u662F\u51CF\u5C11\u56FE\u50CF\u6570\u636E\u4E2D\u7684\u5197\u4F59\u4FE1\u606F\uFF0C\u4ECE\u800C\u7528\u66F4\u52A0\u9AD8\u6548\u7684\u683C\u5F0F\u5B58\u50A8\u548C\u4F20\u8F93\u6570\u636E\u3002</p><p>\u56FE\u50CF\u538B\u7F29\u53EF\u4EE5\u662F\u6709\u635F\u6570\u636E\u538B\u7F29\uFF0C\u4E5F\u53EF\u4EE5\u662F\u65E0\u635F\u6570\u636E\u538B\u7F29\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/shigu/image-yasuo-1.png" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/shigu/image-yasuo-2.png" alt=""></p><p>\u600E\u4E48\u6837\uFF1F</p><p>\u662F\u4E0D\u662F\u611F\u89C9\u56FE\u50CF\u538B\u7F29\u6280\u672F\u6CA1\u6709\u60F3\u8C61\u4E2D\u90A3\u4E48\u7B80\u5355\u4E86\uFF1F</p><p>\u66F4\u591A\u5173\u4E8E\u56FE\u50CF\u538B\u7F29\u7684\u8D44\u6599\u53EF\u53C2\u8003\u4EE5\u4E0B\u94FE\u63A5\u3002</p><blockquote><p>\u673A\u5668\u4E4B\u5FC3\uFF1Ahttps://www.jiqizhixin.com/graph/technologies/08b2b25e-21a0-48e1-9de8-f91d424adfe1</p></blockquote><h3 id="\u4E8C\u3001java\u6570\u5B57\u56FE\u50CF\u5904\u7406" tabindex="-1"><a class="header-anchor" href="#\u4E8C\u3001java\u6570\u5B57\u56FE\u50CF\u5904\u7406" aria-hidden="true">#</a> \u4E8C\u3001Java\u6570\u5B57\u56FE\u50CF\u5904\u7406</h3><p>\u4F5C\u4E3A\u8FD9\u6B21\u201C20 \u591A\u4E07\u5916\u5305\u9879\u76EE\u201D\u7684\u201C\u4E3B\u529B\u5F00\u53D1\u4EBA\u5458\u201D\uFF0C\u6211\u8FD9\u91CC\u5C31\u7ED9\u5927\u5BB6\u4ECB\u7ECD\u4E0B Java \u6570\u5B57\u56FE\u50CF\u5904\u7406\u6280\u672F\u5427\uFF0C\u4E00\u5F00\u59CB\u6211\u5C31\u662F\u7528\u5B83\u6765\u5904\u7406\u56FE\u7247\u7684\u3002</p><p>\u6570\u5B57\u56FE\u50CF\u5904\u7406\uFF08Digital Image Processing\uFF09\u662F\u901A\u8FC7\u8BA1\u7B97\u673A\u5BF9\u56FE\u50CF\u8FDB\u884C\u53BB\u9664\u566A\u58F0\u3001\u589E\u5F3A\u3001\u590D\u539F\u3001\u5206\u5272\u3001\u63D0\u53D6\u7279\u5F81\u7B49\u5904\u7406\u7684\u65B9\u6CD5\u548C\u6280\u672F\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/shigu/image-yasuo-3.png" alt=""></p><p>\u8F93\u5165\u7684\u662F\u56FE\u50CF\u4FE1\u53F7\uFF0C\u7136\u540E\u7ECF\u8FC7 DIP \u8FDB\u884C\u6709\u6548\u7684\u7B97\u6CD5\u5904\u7406\u540E\uFF0C\u8F93\u51FA\u4E3A\u6570\u5B57\u4FE1\u53F7\u3002</p><p>\u4E3A\u4E86\u538B\u7F29\u56FE\u50CF\uFF0C\u6211\u4EEC\u9700\u8981\u8BFB\u53D6\u56FE\u50CF\u5E76\u5C06\u5176\u8F6C\u6362\u6210 BufferedImage \u5BF9\u8C61\uFF0CBufferedImage \u662F Image \u7C7B\u7684\u4E00\u4E2A\u5B50\u7C7B\uFF0C\u63CF\u8FF0\u4E86\u4E00\u4E2A\u5177\u6709\u53EF\u8BBF\u95EE\u7684\u56FE\u50CF\u6570\u636E\u7F13\u51B2\u533A\uFF0C\u7531 ColorModel \u548C Raster \u7684\u56FE\u50CF\u6570\u636E\u7EC4\u6210\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/shigu/image-yasuo-4.png" alt=""></p><p>\u5E9F\u8BDD\u6211\u5C31\u4E0D\u591A\u8BF4\u4E86\uFF0C\u76F4\u63A5\u8FDB\u5165\u5B9E\u6218\u5427\uFF01</p><h3 id="\u4E09\u3001\u56FE\u50CF\u538B\u7F29\u5B9E\u6218" tabindex="-1"><a class="header-anchor" href="#\u4E09\u3001\u56FE\u50CF\u538B\u7F29\u5B9E\u6218" aria-hidden="true">#</a> \u4E09\u3001\u56FE\u50CF\u538B\u7F29\u5B9E\u6218</h3><p>\u521A\u597D\u6211\u672C\u5730\u6709\u4E00\u5F20\u4E4B\u524D\u7528\u8FC7\u7684\u5C01\u9762\u56FE\uFF0C\u79BB 1M \u53EA\u5DEE 236 KB\uFF0C\u53EF\u4EE5\u62FF\u6765\u4F5C\u4E3A\u6D4B\u8BD5\u7528\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/shigu/image-yasuo-5.png" alt=""></p><p>\u8FD9\u5176\u4E2D\u8981\u7528\u5230 ImageIO \u7C7B\uFF0C\u8FD9\u662F\u4E00\u4E2A\u9759\u6001\u7C7B\uFF0C\u63D0\u4F9B\u4E86\u4E00\u7CFB\u5217\u65B9\u6CD5\u7528\u6765\u8BFB\u548C\u5199\u56FE\u50CF\uFF0C\u540C\u65F6\u8FD8\u53EF\u4EE5\u5BF9\u56FE\u50CF\u8FDB\u884C\u7B80\u5355\u7684\u7F16\u7801\u548C\u89E3\u7801\u3002</p><p>\u6BD4\u5982\u8BF4\u901A\u8FC7 <code>ImageIO.read()</code> \u53EF\u4EE5\u5C06\u56FE\u50CF\u8BFB\u53D6\u5230 BufferedImage \u5BF9\u8C61\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">File</span> input <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">File</span><span class="token punctuation">(</span><span class="token string">&quot;ceshi.jpg&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 <span class="token class-name">BufferedImage</span> image <span class="token operator">=</span> <span class="token class-name">ImageIO</span><span class="token punctuation">.</span><span class="token function">read</span><span class="token punctuation">(</span>input<span class="token punctuation">)</span><span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><p>\u6BD4\u5982\u8BF4\u901A\u8FC7 <code>ImageIO.getImageWritersByFormatName()</code> \u53EF\u4EE5\u8FD4\u56DE\u4E00\u4E2AIterator\uFF0C\u5176\u4E2D\u5305\u542B\u4E86\u901A\u8FC7\u547D\u540D\u683C\u5F0F\u5BF9\u56FE\u50CF\u8FDB\u884C\u7F16\u7801\u7684 ImageWriter\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">Iterator</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">ImageWriter</span><span class="token punctuation">&gt;</span></span> writers <span class="token operator">=</span>  <span class="token class-name">ImageIO</span><span class="token punctuation">.</span><span class="token function">getImageWritersByFormatName</span><span class="token punctuation">(</span><span class="token string">&quot;jpg&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 <span class="token class-name">ImageWriter</span> writer <span class="token operator">=</span> <span class="token punctuation">(</span><span class="token class-name">ImageWriter</span><span class="token punctuation">)</span> writers<span class="token punctuation">.</span><span class="token function">next</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
diff --git a/dist/assets/immutable.html.e7e4c546.js b/dist/assets/immutable.html.aab5b4ed.js
similarity index 99%
rename from dist/assets/immutable.html.e7e4c546.js
rename to dist/assets/immutable.html.aab5b4ed.js
index 1730b74f..6e87a8b2 100644
--- a/dist/assets/immutable.html.e7e4c546.js
+++ b/dist/assets/immutable.html.aab5b4ed.js
@@ -1,4 +1,4 @@
-import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e as p}from"./app.a0271b9c.js";const e={},t=p(`<h1 id="\u6DF1\u5165\u7406\u89E3java\u4E2D\u7684\u4E0D\u53EF\u53D8\u5BF9\u8C61" tabindex="-1"><a class="header-anchor" href="#\u6DF1\u5165\u7406\u89E3java\u4E2D\u7684\u4E0D\u53EF\u53D8\u5BF9\u8C61" aria-hidden="true">#</a> \u6DF1\u5165\u7406\u89E3Java\u4E2D\u7684\u4E0D\u53EF\u53D8\u5BF9\u8C61</h1><blockquote><p>\u4E8C\u54E5\uFF0C\u4F60\u80FD\u7ED9\u6211\u8BF4\u8BF4\u4E3A\u4EC0\u4E48 String \u662F immutable \u7C7B\uFF08\u4E0D\u53EF\u53D8\u5BF9\u8C61\uFF09\u5417\uFF1F\u6211\u60F3\u7814\u7A76\u5B83\uFF0C\u60F3\u77E5\u9053\u4E3A\u4EC0\u4E48\u5B83\u5C31\u4E0D\u53EF\u53D8\u4E86\uFF0C\u8FD9\u79CD\u5F3A\u70C8\u7684\u613F\u671B\u5C31\u50CF\u60F3\u7814\u7A76\u6D69\u701A\u7684\u661F\u7A7A\u4E00\u6837\u3002\u4F46\u65E0\u5948\u81EA\u8EAB\u529F\u529B\u6709\u9650\uFF0C\u59CB\u7EC8\u89C9\u5F97\u96FE\u91CC\u770B\u82B1\u7EC8\u9694\u4E00\u5C42\u3002\u4E8C\u54E5\u4F60\u7684\u6587\u7AE0\u603B\u662F\u5145\u6EE1\u8DA3\u5473\u6027\uFF0C\u6211\u60F3\u4E00\u5B9A\u80FD\u591F\u8BF4\u660E\u767D\uFF0C\u6211\u4E5F\u4E00\u5B9A\u80FD\u591F\u770B\u660E\u767D\uFF0C\u80FD\u5728\u63A5\u4E0B\u6765\u5199\u4E00\u5199\u5417\uFF1F</p></blockquote><p>\u6536\u5230\u8BFB\u8005\u5C0F R \u7684\u79C1\u4FE1\u540E\uFF0C\u6211\u5C31\u603B\u611F\u89C9\u81EA\u5DF1\u6709\u4E00\u79CD\u4E49\u4E0D\u5BB9\u8F9E\u7684\u8D23\u4EFB\uFF0C\u975E\u8981\u628A immutable \u7C7B\u8BF4\u660E\u767D\u4E0D\u53EF\uFF01</p><h3 id="_01\u3001\u4EC0\u4E48\u662F\u4E0D\u53EF\u53D8\u7C7B" tabindex="-1"><a class="header-anchor" href="#_01\u3001\u4EC0\u4E48\u662F\u4E0D\u53EF\u53D8\u7C7B" aria-hidden="true">#</a> 01\u3001\u4EC0\u4E48\u662F\u4E0D\u53EF\u53D8\u7C7B</h3><p>\u4E00\u4E2A\u7C7B\u7684\u5BF9\u8C61\u5728\u901A\u8FC7\u6784\u9020\u65B9\u6CD5\u521B\u5EFA\u540E\u5982\u679C\u72B6\u6001\u4E0D\u4F1A\u518D\u88AB\u6539\u53D8\uFF0C\u90A3\u4E48\u5B83\u5C31\u662F\u4E00\u4E2A\u4E0D\u53EF\u53D8\uFF08immutable\uFF09\u7C7B\u3002\u5B83\u7684\u6240\u6709\u6210\u5458\u53D8\u91CF\u7684\u8D4B\u503C\u4EC5\u5728\u6784\u9020\u65B9\u6CD5\u4E2D\u5B8C\u6210\uFF0C\u4E0D\u4F1A\u63D0\u4F9B\u4EFB\u4F55 setter \u65B9\u6CD5\u4F9B\u5916\u90E8\u7C7B\u53BB\u4FEE\u6539\u3002</p><p>\u8FD8\u8BB0\u5F97\u300A\u795E\u96D5\u4FA0\u4FA3\u300B\u4E2D\u5C0F\u9F99\u5973\u7684\u53E4\u5893\u5417\uFF1F\u968F\u7740\u90A3\u4E00\u58F0\u5DE8\u54CD\uFF0C\u4EC5\u6709\u7684\u901A\u9053\u5C31\u88AB\u65E0\u60C5\u5730\u5173\u95ED\u4E86\u3002\u522B\u8F83\u771F\u90A3\u4E2A\u5BC6\u9053\uFF0C\u6211\u8FD9\u4E48\u8BF4\u53EA\u662F\u4E3A\u4E86\u6253\u5F00\u4F60\u7684\u60F3\u8C61\u529B\uFF0C\u8BA9\u4F60\u5BF9\u4E0D\u53EF\u53D8\u7C7B\u6709\u4E00\u4E2A\u66F4\u76F4\u89C2\u7684\u5370\u8C61\u3002</p><p>\u81EA\u4ECE\u6709\u4E86\u591A\u7EBF\u7A0B\uFF0C\u751F\u4EA7\u529B\u5C31\u88AB\u65E0\u9650\u5730\u653E\u5927\u4E86\uFF0C\u6240\u6709\u7684\u7A0B\u5E8F\u5458\u90FD\u7231\u5B83\uFF0C\u56E0\u4E3A\u5F3A\u5927\u7684\u786C\u4EF6\u80FD\u529B\u88AB\u5145\u5206\u5730\u5229\u7528\u4E86\u3002\u4F46\u4E0E\u6B64\u540C\u65F6\uFF0C\u6240\u6709\u7684\u7A0B\u5E8F\u5458\u90FD\u5BF9\u5B83\u5FC3\u751F\u5FCC\u60EE\uFF0C\u56E0\u4E3A\u4E00\u4E0D\u5C0F\u5FC3\uFF0C\u591A\u7EBF\u7A0B\u5C31\u4F1A\u628A\u5BF9\u8C61\u7684\u72B6\u6001\u53D8\u5F97\u6DF7\u4E71\u4E0D\u582A\u3002</p><p>\u4E3A\u4E86\u4FDD\u62A4\u72B6\u6001\u7684\u539F\u5B50\u6027\u3001\u53EF\u89C1\u6027\u3001\u6709\u5E8F\u6027\uFF0C\u6211\u4EEC\u7A0B\u5E8F\u5458\u53EF\u4EE5\u8BF4\u662F\u7AED\u5C3D\u6240\u80FD\u3002\u5176\u4E2D\uFF0Csynchronized\uFF08\u540C\u6B65\uFF09\u5173\u952E\u5B57\u662F\u6700\u7B80\u5355\u6700\u5165\u95E8\u7684\u4E00\u79CD\u89E3\u51B3\u65B9\u6848\u3002</p><p>\u5047\u5982\u8BF4\u7C7B\u662F\u4E0D\u53EF\u53D8\u7684\uFF0C\u90A3\u4E48\u5BF9\u8C61\u7684\u72B6\u6001\u5C31\u4E5F\u662F\u4E0D\u53EF\u53D8\u7684\u3002\u8FD9\u6837\u7684\u8BDD\uFF0C\u6BCF\u6B21\u4FEE\u6539\u5BF9\u8C61\u7684\u72B6\u6001\uFF0C\u5C31\u4F1A\u4EA7\u751F\u4E00\u4E2A\u65B0\u7684\u5BF9\u8C61\u4F9B\u4E0D\u540C\u7684\u7EBF\u7A0B\u4F7F\u7528\uFF0C\u6211\u4EEC\u7A0B\u5E8F\u5458\u5C31\u4E0D\u5FC5\u518D\u62C5\u5FC3\u5E76\u53D1\u95EE\u9898\u4E86\u3002</p><h3 id="_02\u3001\u5E38\u89C1\u7684\u4E0D\u53EF\u53D8\u7C7B" tabindex="-1"><a class="header-anchor" href="#_02\u3001\u5E38\u89C1\u7684\u4E0D\u53EF\u53D8\u7C7B" aria-hidden="true">#</a> 02\u3001\u5E38\u89C1\u7684\u4E0D\u53EF\u53D8\u7C7B</h3><p>\u63D0\u5230\u4E0D\u53EF\u53D8\u7C7B\uFF0C\u51E0\u4E4E\u6240\u6709\u7684\u7A0B\u5E8F\u5458\u7B2C\u4E00\u4E2A\u60F3\u5230\u7684\uFF0C\u5C31\u662F String \u7C7B\u3002\u90A3\u4E3A\u4EC0\u4E48 String \u7C7B\u8981\u88AB\u8BBE\u8BA1\u6210\u4E0D\u53EF\u53D8\u7684\u5462\uFF1F</p><p>1\uFF09\u5E38\u91CF\u6C60\u7684\u9700\u8981</p><p>\u5B57\u7B26\u4E32\u5E38\u91CF\u6C60\u662F Java \u5806\u5185\u5B58\u4E2D\u4E00\u4E2A\u7279\u6B8A\u7684\u5B58\u50A8\u533A\u57DF\uFF0C\u5F53\u521B\u5EFA\u4E00\u4E2A String \u5BF9\u8C61\u65F6\uFF0C\u5047\u5982\u6B64\u5B57\u7B26\u4E32\u5728\u5E38\u91CF\u6C60\u4E2D\u4E0D\u5B58\u5728\uFF0C\u90A3\u4E48\u5C31\u521B\u5EFA\u4E00\u4E2A\uFF1B\u5047\u5982\u5DF2\u7ECF\u5B58\uFF0C\u5C31\u4E0D\u4F1A\u518D\u521B\u5EFA\u4E86\uFF0C\u800C\u662F\u76F4\u63A5\u5F15\u7528\u5DF2\u7ECF\u5B58\u5728\u7684\u5BF9\u8C61\u3002\u8FD9\u6837\u505A\u80FD\u591F\u51CF\u5C11 JVM \u7684\u5185\u5B58\u5F00\u9500\uFF0C\u63D0\u9AD8\u6548\u7387\u3002</p><p>2\uFF09hashCode \u7684\u9700\u8981</p><p>\u56E0\u4E3A\u5B57\u7B26\u4E32\u662F\u4E0D\u53EF\u53D8\u7684\uFF0C\u6240\u4EE5\u5728\u5B83\u521B\u5EFA\u7684\u65F6\u5019\uFF0C\u5176 hashCode \u5C31\u88AB\u7F13\u5B58\u4E86\uFF0C\u56E0\u6B64\u975E\u5E38\u9002\u5408\u4F5C\u4E3A\u54C8\u5E0C\u503C\uFF08\u6BD4\u5982\u8BF4\u4F5C\u4E3A HashMap \u7684\u952E\uFF09\uFF0C\u591A\u6B21\u8C03\u7528\u53EA\u8FD4\u56DE\u540C\u4E00\u4E2A\u503C\uFF0C\u6765\u63D0\u9AD8\u6548\u7387\u3002</p><p>3\uFF09\u7EBF\u7A0B\u5B89\u5168</p><p>\u5C31\u50CF\u4E4B\u524D\u8BF4\u7684\u90A3\u6837\uFF0C\u5982\u679C\u5BF9\u8C61\u7684\u72B6\u6001\u662F\u53EF\u53D8\u7684\uFF0C\u90A3\u4E48\u5728\u591A\u7EBF\u7A0B\u73AF\u5883\u4E0B\uFF0C\u5C31\u5F88\u5BB9\u6613\u9020\u6210\u4E0D\u53EF\u9884\u671F\u7684\u7ED3\u679C\u3002\u800C String \u662F\u4E0D\u53EF\u53D8\u7684\uFF0C\u5C31\u53EF\u4EE5\u5728\u591A\u4E2A\u7EBF\u7A0B\u4E4B\u95F4\u5171\u4EAB\uFF0C\u4E0D\u9700\u8981\u540C\u6B65\u5904\u7406\u3002</p><p>\u56E0\u6B64\uFF0C\u5F53\u6211\u4EEC\u8C03\u7528 String \u7C7B\u7684\u4EFB\u4F55\u65B9\u6CD5\uFF08\u6BD4\u5982\u8BF4 <code>trim()</code>\u3001<code>substring()</code>\u3001<code>toLowerCase()</code>\uFF09\u65F6\uFF0C\u603B\u4F1A\u8FD4\u56DE\u4E00\u4E2A\u65B0\u7684\u5BF9\u8C61\uFF0C\u800C\u4E0D\u5F71\u54CD\u4E4B\u524D\u7684\u503C\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">String</span> cmower <span class="token operator">=</span> <span class="token string">&quot;\u6C89\u9ED8\u738B\u4E8C\uFF0C\u4E00\u679A\u6709\u8DA3\u7684\u7A0B\u5E8F\u5458&quot;</span><span class="token punctuation">;</span>
+import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e as p}from"./app.615e41d8.js";const e={},t=p(`<h1 id="\u6DF1\u5165\u7406\u89E3java\u4E2D\u7684\u4E0D\u53EF\u53D8\u5BF9\u8C61" tabindex="-1"><a class="header-anchor" href="#\u6DF1\u5165\u7406\u89E3java\u4E2D\u7684\u4E0D\u53EF\u53D8\u5BF9\u8C61" aria-hidden="true">#</a> \u6DF1\u5165\u7406\u89E3Java\u4E2D\u7684\u4E0D\u53EF\u53D8\u5BF9\u8C61</h1><blockquote><p>\u4E8C\u54E5\uFF0C\u4F60\u80FD\u7ED9\u6211\u8BF4\u8BF4\u4E3A\u4EC0\u4E48 String \u662F immutable \u7C7B\uFF08\u4E0D\u53EF\u53D8\u5BF9\u8C61\uFF09\u5417\uFF1F\u6211\u60F3\u7814\u7A76\u5B83\uFF0C\u60F3\u77E5\u9053\u4E3A\u4EC0\u4E48\u5B83\u5C31\u4E0D\u53EF\u53D8\u4E86\uFF0C\u8FD9\u79CD\u5F3A\u70C8\u7684\u613F\u671B\u5C31\u50CF\u60F3\u7814\u7A76\u6D69\u701A\u7684\u661F\u7A7A\u4E00\u6837\u3002\u4F46\u65E0\u5948\u81EA\u8EAB\u529F\u529B\u6709\u9650\uFF0C\u59CB\u7EC8\u89C9\u5F97\u96FE\u91CC\u770B\u82B1\u7EC8\u9694\u4E00\u5C42\u3002\u4E8C\u54E5\u4F60\u7684\u6587\u7AE0\u603B\u662F\u5145\u6EE1\u8DA3\u5473\u6027\uFF0C\u6211\u60F3\u4E00\u5B9A\u80FD\u591F\u8BF4\u660E\u767D\uFF0C\u6211\u4E5F\u4E00\u5B9A\u80FD\u591F\u770B\u660E\u767D\uFF0C\u80FD\u5728\u63A5\u4E0B\u6765\u5199\u4E00\u5199\u5417\uFF1F</p></blockquote><p>\u6536\u5230\u8BFB\u8005\u5C0F R \u7684\u79C1\u4FE1\u540E\uFF0C\u6211\u5C31\u603B\u611F\u89C9\u81EA\u5DF1\u6709\u4E00\u79CD\u4E49\u4E0D\u5BB9\u8F9E\u7684\u8D23\u4EFB\uFF0C\u975E\u8981\u628A immutable \u7C7B\u8BF4\u660E\u767D\u4E0D\u53EF\uFF01</p><h3 id="_01\u3001\u4EC0\u4E48\u662F\u4E0D\u53EF\u53D8\u7C7B" tabindex="-1"><a class="header-anchor" href="#_01\u3001\u4EC0\u4E48\u662F\u4E0D\u53EF\u53D8\u7C7B" aria-hidden="true">#</a> 01\u3001\u4EC0\u4E48\u662F\u4E0D\u53EF\u53D8\u7C7B</h3><p>\u4E00\u4E2A\u7C7B\u7684\u5BF9\u8C61\u5728\u901A\u8FC7\u6784\u9020\u65B9\u6CD5\u521B\u5EFA\u540E\u5982\u679C\u72B6\u6001\u4E0D\u4F1A\u518D\u88AB\u6539\u53D8\uFF0C\u90A3\u4E48\u5B83\u5C31\u662F\u4E00\u4E2A\u4E0D\u53EF\u53D8\uFF08immutable\uFF09\u7C7B\u3002\u5B83\u7684\u6240\u6709\u6210\u5458\u53D8\u91CF\u7684\u8D4B\u503C\u4EC5\u5728\u6784\u9020\u65B9\u6CD5\u4E2D\u5B8C\u6210\uFF0C\u4E0D\u4F1A\u63D0\u4F9B\u4EFB\u4F55 setter \u65B9\u6CD5\u4F9B\u5916\u90E8\u7C7B\u53BB\u4FEE\u6539\u3002</p><p>\u8FD8\u8BB0\u5F97\u300A\u795E\u96D5\u4FA0\u4FA3\u300B\u4E2D\u5C0F\u9F99\u5973\u7684\u53E4\u5893\u5417\uFF1F\u968F\u7740\u90A3\u4E00\u58F0\u5DE8\u54CD\uFF0C\u4EC5\u6709\u7684\u901A\u9053\u5C31\u88AB\u65E0\u60C5\u5730\u5173\u95ED\u4E86\u3002\u522B\u8F83\u771F\u90A3\u4E2A\u5BC6\u9053\uFF0C\u6211\u8FD9\u4E48\u8BF4\u53EA\u662F\u4E3A\u4E86\u6253\u5F00\u4F60\u7684\u60F3\u8C61\u529B\uFF0C\u8BA9\u4F60\u5BF9\u4E0D\u53EF\u53D8\u7C7B\u6709\u4E00\u4E2A\u66F4\u76F4\u89C2\u7684\u5370\u8C61\u3002</p><p>\u81EA\u4ECE\u6709\u4E86\u591A\u7EBF\u7A0B\uFF0C\u751F\u4EA7\u529B\u5C31\u88AB\u65E0\u9650\u5730\u653E\u5927\u4E86\uFF0C\u6240\u6709\u7684\u7A0B\u5E8F\u5458\u90FD\u7231\u5B83\uFF0C\u56E0\u4E3A\u5F3A\u5927\u7684\u786C\u4EF6\u80FD\u529B\u88AB\u5145\u5206\u5730\u5229\u7528\u4E86\u3002\u4F46\u4E0E\u6B64\u540C\u65F6\uFF0C\u6240\u6709\u7684\u7A0B\u5E8F\u5458\u90FD\u5BF9\u5B83\u5FC3\u751F\u5FCC\u60EE\uFF0C\u56E0\u4E3A\u4E00\u4E0D\u5C0F\u5FC3\uFF0C\u591A\u7EBF\u7A0B\u5C31\u4F1A\u628A\u5BF9\u8C61\u7684\u72B6\u6001\u53D8\u5F97\u6DF7\u4E71\u4E0D\u582A\u3002</p><p>\u4E3A\u4E86\u4FDD\u62A4\u72B6\u6001\u7684\u539F\u5B50\u6027\u3001\u53EF\u89C1\u6027\u3001\u6709\u5E8F\u6027\uFF0C\u6211\u4EEC\u7A0B\u5E8F\u5458\u53EF\u4EE5\u8BF4\u662F\u7AED\u5C3D\u6240\u80FD\u3002\u5176\u4E2D\uFF0Csynchronized\uFF08\u540C\u6B65\uFF09\u5173\u952E\u5B57\u662F\u6700\u7B80\u5355\u6700\u5165\u95E8\u7684\u4E00\u79CD\u89E3\u51B3\u65B9\u6848\u3002</p><p>\u5047\u5982\u8BF4\u7C7B\u662F\u4E0D\u53EF\u53D8\u7684\uFF0C\u90A3\u4E48\u5BF9\u8C61\u7684\u72B6\u6001\u5C31\u4E5F\u662F\u4E0D\u53EF\u53D8\u7684\u3002\u8FD9\u6837\u7684\u8BDD\uFF0C\u6BCF\u6B21\u4FEE\u6539\u5BF9\u8C61\u7684\u72B6\u6001\uFF0C\u5C31\u4F1A\u4EA7\u751F\u4E00\u4E2A\u65B0\u7684\u5BF9\u8C61\u4F9B\u4E0D\u540C\u7684\u7EBF\u7A0B\u4F7F\u7528\uFF0C\u6211\u4EEC\u7A0B\u5E8F\u5458\u5C31\u4E0D\u5FC5\u518D\u62C5\u5FC3\u5E76\u53D1\u95EE\u9898\u4E86\u3002</p><h3 id="_02\u3001\u5E38\u89C1\u7684\u4E0D\u53EF\u53D8\u7C7B" tabindex="-1"><a class="header-anchor" href="#_02\u3001\u5E38\u89C1\u7684\u4E0D\u53EF\u53D8\u7C7B" aria-hidden="true">#</a> 02\u3001\u5E38\u89C1\u7684\u4E0D\u53EF\u53D8\u7C7B</h3><p>\u63D0\u5230\u4E0D\u53EF\u53D8\u7C7B\uFF0C\u51E0\u4E4E\u6240\u6709\u7684\u7A0B\u5E8F\u5458\u7B2C\u4E00\u4E2A\u60F3\u5230\u7684\uFF0C\u5C31\u662F String \u7C7B\u3002\u90A3\u4E3A\u4EC0\u4E48 String \u7C7B\u8981\u88AB\u8BBE\u8BA1\u6210\u4E0D\u53EF\u53D8\u7684\u5462\uFF1F</p><p>1\uFF09\u5E38\u91CF\u6C60\u7684\u9700\u8981</p><p>\u5B57\u7B26\u4E32\u5E38\u91CF\u6C60\u662F Java \u5806\u5185\u5B58\u4E2D\u4E00\u4E2A\u7279\u6B8A\u7684\u5B58\u50A8\u533A\u57DF\uFF0C\u5F53\u521B\u5EFA\u4E00\u4E2A String \u5BF9\u8C61\u65F6\uFF0C\u5047\u5982\u6B64\u5B57\u7B26\u4E32\u5728\u5E38\u91CF\u6C60\u4E2D\u4E0D\u5B58\u5728\uFF0C\u90A3\u4E48\u5C31\u521B\u5EFA\u4E00\u4E2A\uFF1B\u5047\u5982\u5DF2\u7ECF\u5B58\uFF0C\u5C31\u4E0D\u4F1A\u518D\u521B\u5EFA\u4E86\uFF0C\u800C\u662F\u76F4\u63A5\u5F15\u7528\u5DF2\u7ECF\u5B58\u5728\u7684\u5BF9\u8C61\u3002\u8FD9\u6837\u505A\u80FD\u591F\u51CF\u5C11 JVM \u7684\u5185\u5B58\u5F00\u9500\uFF0C\u63D0\u9AD8\u6548\u7387\u3002</p><p>2\uFF09hashCode \u7684\u9700\u8981</p><p>\u56E0\u4E3A\u5B57\u7B26\u4E32\u662F\u4E0D\u53EF\u53D8\u7684\uFF0C\u6240\u4EE5\u5728\u5B83\u521B\u5EFA\u7684\u65F6\u5019\uFF0C\u5176 hashCode \u5C31\u88AB\u7F13\u5B58\u4E86\uFF0C\u56E0\u6B64\u975E\u5E38\u9002\u5408\u4F5C\u4E3A\u54C8\u5E0C\u503C\uFF08\u6BD4\u5982\u8BF4\u4F5C\u4E3A HashMap \u7684\u952E\uFF09\uFF0C\u591A\u6B21\u8C03\u7528\u53EA\u8FD4\u56DE\u540C\u4E00\u4E2A\u503C\uFF0C\u6765\u63D0\u9AD8\u6548\u7387\u3002</p><p>3\uFF09\u7EBF\u7A0B\u5B89\u5168</p><p>\u5C31\u50CF\u4E4B\u524D\u8BF4\u7684\u90A3\u6837\uFF0C\u5982\u679C\u5BF9\u8C61\u7684\u72B6\u6001\u662F\u53EF\u53D8\u7684\uFF0C\u90A3\u4E48\u5728\u591A\u7EBF\u7A0B\u73AF\u5883\u4E0B\uFF0C\u5C31\u5F88\u5BB9\u6613\u9020\u6210\u4E0D\u53EF\u9884\u671F\u7684\u7ED3\u679C\u3002\u800C String \u662F\u4E0D\u53EF\u53D8\u7684\uFF0C\u5C31\u53EF\u4EE5\u5728\u591A\u4E2A\u7EBF\u7A0B\u4E4B\u95F4\u5171\u4EAB\uFF0C\u4E0D\u9700\u8981\u540C\u6B65\u5904\u7406\u3002</p><p>\u56E0\u6B64\uFF0C\u5F53\u6211\u4EEC\u8C03\u7528 String \u7C7B\u7684\u4EFB\u4F55\u65B9\u6CD5\uFF08\u6BD4\u5982\u8BF4 <code>trim()</code>\u3001<code>substring()</code>\u3001<code>toLowerCase()</code>\uFF09\u65F6\uFF0C\u603B\u4F1A\u8FD4\u56DE\u4E00\u4E2A\u65B0\u7684\u5BF9\u8C61\uFF0C\u800C\u4E0D\u5F71\u54CD\u4E4B\u524D\u7684\u503C\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">String</span> cmower <span class="token operator">=</span> <span class="token string">&quot;\u6C89\u9ED8\u738B\u4E8C\uFF0C\u4E00\u679A\u6709\u8DA3\u7684\u7A0B\u5E8F\u5458&quot;</span><span class="token punctuation">;</span>
 cmower<span class="token punctuation">.</span><span class="token function">substring</span><span class="token punctuation">(</span><span class="token number">0</span><span class="token punctuation">,</span><span class="token number">4</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span>cmower<span class="token punctuation">)</span><span class="token punctuation">;</span><span class="token comment">// \u6C89\u9ED8\u738B\u4E8C\uFF0C\u4E00\u679A\u6709\u8DA3\u7684\u7A0B\u5E8F\u5458</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>\u867D\u7136\u8C03\u7528 <code>substring()</code> \u65B9\u6CD5\u5BF9 cmower \u8FDB\u884C\u4E86\u622A\u53D6\uFF0C\u4F46 cmower \u7684\u503C\u6CA1\u6709\u6539\u53D8\u3002</p><p>\u9664\u4E86 String \u7C7B\uFF0C\u5305\u88C5\u5668\u7C7B Integer\u3001Long \u7B49\u4E5F\u662F\u4E0D\u53EF\u53D8\u7C7B\u3002</p><h3 id="_03\u3001\u624B\u64B8\u4E0D\u53EF\u53D8\u7C7B" tabindex="-1"><a class="header-anchor" href="#_03\u3001\u624B\u64B8\u4E0D\u53EF\u53D8\u7C7B" aria-hidden="true">#</a> 03\u3001\u624B\u64B8\u4E0D\u53EF\u53D8\u7C7B</h3><p>\u770B\u61C2\u4E00\u4E2A\u4E0D\u53EF\u53D8\u7C7B\u4E5F\u8BB8\u5BB9\u6613\uFF0C\u4F46\u8981\u521B\u5EFA\u4E00\u4E2A\u81EA\u5B9A\u4E49\u7684\u4E0D\u53EF\u53D8\u7C7B\u6050\u6015\u5C31\u6709\u70B9\u96BE\u4E86\u3002\u4F46\u77E5\u96BE\u800C\u8FDB\u662F\u6211\u4EEC\u4F5C\u4E3A\u4E00\u540D\u4F18\u79C0\u7684\u7A0B\u5E8F\u5458\u4E0D\u53EF\u6216\u7F3A\u7684\u54C1\u8D28\uFF0C\u6B63\u56E0\u4E3A\u4E0D\u5BB9\u6613\uFF0C\u6211\u4EEC\u624D\u80FD\u771F\u6B63\u5730\u638C\u63E1\u5B83\u3002</p><p>\u63A5\u4E0B\u6765\uFF0C\u5C31\u8BF7\u548C\u6211\u4E00\u8D77\uFF0C\u6765\u81EA\u5B9A\u4E49\u4E00\u4E2A\u4E0D\u53EF\u53D8\u7C7B\u5427\u3002\u4E00\u4E2A\u4E0D\u53EF\u53D8\u7C7B\uFF0C\u5FC5\u987B\u8981\u6EE1\u8DB3\u4EE5\u4E0B 4 \u4E2A\u6761\u4EF6\uFF1A</p><p>1\uFF09\u786E\u4FDD\u7C7B\u662F final \u7684\uFF0C\u4E0D\u5141\u8BB8\u88AB\u5176\u4ED6\u7C7B\u7EE7\u627F\u3002</p><p>2\uFF09\u786E\u4FDD\u6240\u6709\u7684\u6210\u5458\u53D8\u91CF\uFF08\u5B57\u6BB5\uFF09\u662F final \u7684\uFF0C\u8FD9\u6837\u7684\u8BDD\uFF0C\u5B83\u4EEC\u5C31\u53EA\u80FD\u5728\u6784\u9020\u65B9\u6CD5\u4E2D\u521D\u59CB\u5316\u503C\uFF0C\u5E76\u4E14\u4E0D\u4F1A\u5728\u968F\u540E\u88AB\u4FEE\u6539\u3002</p><p>3\uFF09\u4E0D\u8981\u63D0\u4F9B\u4EFB\u4F55 setter \u65B9\u6CD5\u3002</p><p>4\uFF09\u5982\u679C\u8981\u4FEE\u6539\u7C7B\u7684\u72B6\u6001\uFF0C\u5FC5\u987B\u8FD4\u56DE\u4E00\u4E2A\u65B0\u7684\u5BF9\u8C61\u3002</p><p>\u6309\u7167\u4EE5\u4E0A\u6761\u4EF6\uFF0C\u6211\u4EEC\u6765\u81EA\u5B9A\u4E49\u4E00\u4E2A\u7B80\u5355\u7684\u4E0D\u53EF\u53D8\u7C7B Writer\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">final</span> <span class="token keyword">class</span> <span class="token class-name">Writer</span> <span class="token punctuation">{</span>
diff --git a/dist/assets/immutable.html.923c43ef.js b/dist/assets/immutable.html.acff64d4.js
similarity index 99%
rename from dist/assets/immutable.html.923c43ef.js
rename to dist/assets/immutable.html.acff64d4.js
index 98c348cc..0bad028d 100644
--- a/dist/assets/immutable.html.923c43ef.js
+++ b/dist/assets/immutable.html.acff64d4.js
@@ -1,4 +1,4 @@
-import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e as p}from"./app.a0271b9c.js";const t={},e=p(`<h1 id="\u4E3A\u4EC0\u4E48string\u662F\u4E0D\u53EF\u53D8\u7684" tabindex="-1"><a class="header-anchor" href="#\u4E3A\u4EC0\u4E48string\u662F\u4E0D\u53EF\u53D8\u7684" aria-hidden="true">#</a> \u4E3A\u4EC0\u4E48String\u662F\u4E0D\u53EF\u53D8\u7684\uFF1F</h1><p>\u6211\u6B63\u5750\u5728\u6C99\u53D1\u4E0A\u6D25\u6D25\u6709\u5473\u5730\u8BFB\u5218\u6B23\u5927\u4F6C\u7684\u300A\u7801\u519C\u7FFB\u8EAB\u300B\u2014\u2014Java \u5E1D\u56FD\u8FD9\u4E00\u7AE0\uFF0C\u95E8\u94C3\u54CD\u4E86\u3002\u8D77\u8EAB\u6253\u5F00\u95E8\u4E00\u770B\uFF0C\u662F\u4E09\u59B9\uFF0C\u5979\u4ECE\u5B66\u6821\u56DE\u6765\u4E86\u3002</p><p>\u201C\u4E09\u59B9\uFF0C\u4F60\u56DE\u6765\u7684\u771F\u53CA\u65F6\uFF0C\u4ECA\u5929\u6211\u4EEC\u6253\u7B97\u8BB2 Java \u4E2D\u7684\u5B57\u7B26\u4E32\u5462\u3002\u201D\u7B49\u4E09\u59B9\u6362\u978B\u7684\u65F6\u5019\u6211\u8BF4\u3002</p><p>\u201C\u54E6\uFF0C\u53EF\u4EE5\u5440\uFF0C\u54E5\u3002\u542C\u8BF4\u5B57\u7B26\u4E32\u7684\u7EC6\u8282\u7279\u522B\u591A\uFF0C\u4EC0\u4E48\u5B57\u7B26\u4E32\u5E38\u91CF\u6C60\u4E86\u3001\u5B57\u7B26\u4E32\u4E0D\u53EF\u53D8\u6027\u4E86\u3001\u5B57\u7B26\u4E32\u62FC\u63A5\u4E86\u3001\u5B57\u7B26\u4E32\u957F\u5EA6\u9650\u5236\u4E86\u7B49\u7B49\uFF0C\u4F60\u6700\u597D\u6162\u6162\u8BB2\uFF0C\u5426\u5219\u6211\u53EF\u80FD\u4E00\u65F6\u534A\u4F1A\u6D88\u5316\u4E0D\u4E86\u3002\u201D\u4E09\u59B9\u7684\u6001\u5EA6\u663E\u5F97\u5F88\u8BDA\u6073\u3002</p><p>\u201C\u55EF\uFF0C\u6211\u5DF2\u7ECF\u60F3\u597D\u4E86\uFF0C\u4ECA\u5929\u5C31\u53EA\u5E26\u4F60\u5927\u6982\u8BA4\u8BC6\u4E00\u4E0B\u5B57\u7B26\u4E32\uFF0C\u5177\u4F53\u7684\u7EC6\u8282\u54B1\u4EEC\u540E\u9762\u518D\u6162\u6162\u8BB2\uFF0C\u4FDD\u8BC1\u4F60\u80FD\u53CA\u65F6\u6D88\u5316\u3002\u201D</p><p>\u201C\u597D\uFF0C\u90A3\u5C31\u5F00\u59CB\u5427\u3002\u201D\u4E09\u59B9\u5DF2\u7ECF\u51C6\u5907\u597D\u5750\u5728\u4E86\u7535\u8111\u684C\u7684\u8FB9\u4E0A\u3002</p><p>\u6211\u5E94\u4E86\u4E00\u58F0\u540E\u8D70\u5230\u7535\u8111\u684C\u524D\u5750\u4E0B\u6765\uFF0C\u987A\u624B\u6253\u5F00 Intellij IDEA\uFF0C\u5E76\u627E\u5230\u4E86 String \u7684\u6E90\u7801\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">final</span> <span class="token keyword">class</span> <span class="token class-name">String</span>
+import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e as p}from"./app.615e41d8.js";const t={},e=p(`<h1 id="\u4E3A\u4EC0\u4E48string\u662F\u4E0D\u53EF\u53D8\u7684" tabindex="-1"><a class="header-anchor" href="#\u4E3A\u4EC0\u4E48string\u662F\u4E0D\u53EF\u53D8\u7684" aria-hidden="true">#</a> \u4E3A\u4EC0\u4E48String\u662F\u4E0D\u53EF\u53D8\u7684\uFF1F</h1><p>\u6211\u6B63\u5750\u5728\u6C99\u53D1\u4E0A\u6D25\u6D25\u6709\u5473\u5730\u8BFB\u5218\u6B23\u5927\u4F6C\u7684\u300A\u7801\u519C\u7FFB\u8EAB\u300B\u2014\u2014Java \u5E1D\u56FD\u8FD9\u4E00\u7AE0\uFF0C\u95E8\u94C3\u54CD\u4E86\u3002\u8D77\u8EAB\u6253\u5F00\u95E8\u4E00\u770B\uFF0C\u662F\u4E09\u59B9\uFF0C\u5979\u4ECE\u5B66\u6821\u56DE\u6765\u4E86\u3002</p><p>\u201C\u4E09\u59B9\uFF0C\u4F60\u56DE\u6765\u7684\u771F\u53CA\u65F6\uFF0C\u4ECA\u5929\u6211\u4EEC\u6253\u7B97\u8BB2 Java \u4E2D\u7684\u5B57\u7B26\u4E32\u5462\u3002\u201D\u7B49\u4E09\u59B9\u6362\u978B\u7684\u65F6\u5019\u6211\u8BF4\u3002</p><p>\u201C\u54E6\uFF0C\u53EF\u4EE5\u5440\uFF0C\u54E5\u3002\u542C\u8BF4\u5B57\u7B26\u4E32\u7684\u7EC6\u8282\u7279\u522B\u591A\uFF0C\u4EC0\u4E48\u5B57\u7B26\u4E32\u5E38\u91CF\u6C60\u4E86\u3001\u5B57\u7B26\u4E32\u4E0D\u53EF\u53D8\u6027\u4E86\u3001\u5B57\u7B26\u4E32\u62FC\u63A5\u4E86\u3001\u5B57\u7B26\u4E32\u957F\u5EA6\u9650\u5236\u4E86\u7B49\u7B49\uFF0C\u4F60\u6700\u597D\u6162\u6162\u8BB2\uFF0C\u5426\u5219\u6211\u53EF\u80FD\u4E00\u65F6\u534A\u4F1A\u6D88\u5316\u4E0D\u4E86\u3002\u201D\u4E09\u59B9\u7684\u6001\u5EA6\u663E\u5F97\u5F88\u8BDA\u6073\u3002</p><p>\u201C\u55EF\uFF0C\u6211\u5DF2\u7ECF\u60F3\u597D\u4E86\uFF0C\u4ECA\u5929\u5C31\u53EA\u5E26\u4F60\u5927\u6982\u8BA4\u8BC6\u4E00\u4E0B\u5B57\u7B26\u4E32\uFF0C\u5177\u4F53\u7684\u7EC6\u8282\u54B1\u4EEC\u540E\u9762\u518D\u6162\u6162\u8BB2\uFF0C\u4FDD\u8BC1\u4F60\u80FD\u53CA\u65F6\u6D88\u5316\u3002\u201D</p><p>\u201C\u597D\uFF0C\u90A3\u5C31\u5F00\u59CB\u5427\u3002\u201D\u4E09\u59B9\u5DF2\u7ECF\u51C6\u5907\u597D\u5750\u5728\u4E86\u7535\u8111\u684C\u7684\u8FB9\u4E0A\u3002</p><p>\u6211\u5E94\u4E86\u4E00\u58F0\u540E\u8D70\u5230\u7535\u8111\u684C\u524D\u5750\u4E0B\u6765\uFF0C\u987A\u624B\u6253\u5F00 Intellij IDEA\uFF0C\u5E76\u627E\u5230\u4E86 String \u7684\u6E90\u7801\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">final</span> <span class="token keyword">class</span> <span class="token class-name">String</span>
     <span class="token keyword">implements</span> <span class="token class-name"><span class="token namespace">java<span class="token punctuation">.</span>io<span class="token punctuation">.</span></span>Serializable</span><span class="token punctuation">,</span> <span class="token class-name">Comparable</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">String</span><span class="token punctuation">&gt;</span></span><span class="token punctuation">,</span> <span class="token class-name">CharSequence</span> <span class="token punctuation">{</span>
     <span class="token annotation punctuation">@Stable</span>
     <span class="token keyword">private</span> <span class="token keyword">final</span> <span class="token keyword">byte</span><span class="token punctuation">[</span><span class="token punctuation">]</span> value<span class="token punctuation">;</span>
diff --git a/dist/assets/index.html.2971f84c.js b/dist/assets/index.html.2971f84c.js
deleted file mode 100644
index f157e2a6..00000000
--- a/dist/assets/index.html.2971f84c.js
+++ /dev/null
@@ -1 +0,0 @@
-import{_ as e}from"./plugin-vue_export-helper.21dcd24c.js";import{o as t,c as a,e as r}from"./app.a0271b9c.js";const i={},p=r('<h1 id="\u4ECA\u5929-\u6211\u51B3\u5B9A\u5E72\u4EF6\u5927\u4E8B" tabindex="-1"><a class="header-anchor" href="#\u4ECA\u5929-\u6211\u51B3\u5B9A\u5E72\u4EF6\u5927\u4E8B" aria-hidden="true">#</a> \u4ECA\u5929\uFF0C\u6211\u51B3\u5B9A\u5E72\u4EF6\u5927\u4E8B\uFF01</h1><p>\u5927\u5BB6\u597D\uFF0C\u6211\u662F\u4E8C\u54E5\u5440\u3002\u5728\u51C6\u5907\u4E86 3 \u4E2A\u591A\u6708\u540E\uFF0C\u6211\u7EC8\u4E8E\u51B3\u5B9A\u5728\u4ECA\u5929\u641E\u4E00\u4EF6\u5927\u4E8B\uFF1A<strong>\u6B63\u5F0F\u5F00\u653E\u6211\u7684\u7F16\u7A0B\u77E5\u8BC6\u661F\u7403\uFF08Java \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF\uFF09</strong>\uFF01</p><p>\u8FD9\u662F\u4E00\u4E2AJava \u5B66\u4E60\u6307\u5357+\u7F16\u7A0B\u5B9E\u6218\u7684\u5B66\u4E60\u5B9D\u5730\uFF0C\u53EF\u4EE5<strong>\u5E2E\u52A9\u4F60\u63D0\u9AD8\u7F16\u7A0B\u80FD\u529B\u3001\u517B\u6210\u597D\u7684\u5B66\u4E60\u4E60\u60EF\u3001\u627E\u5230\u5FD7\u540C\u9053\u5408\u7684\u5B66\u4E60\u4F19\u4F34\u3001\u62FF\u5230\u66F4\u597D\u7684 Offer</strong>\u3002</p><p>\u5BF9\u4E8E\u5927\u591A\u6570\u4EBA\u6765\u8BF4\uFF0C\u60F0\u6027\u662F\u4E0E\u751F\u4FF1\u6765\u7684\uFF0C\u90A3\u4E48\u5F53\u4F60\u5904\u5728\u8FD9\u6837\u4E00\u4E2A\u79EF\u6781\u7684\u5B66\u4E60\u6C1B\u56F4\u5F53\u4E2D\uFF0C\u5C31\u5F88\u5BB9\u6613\u53D7\u5230\u611F\u67D3\uFF0C\u6BCF\u5929\u4E0D\u8BA4\u771F\u5B66\u4E60\u70B9\uFF0C\u5C31\u603B\u4F1A\u611F\u89C9\u61CA\u607C\u3002</p><p>\u53CD\u6B63\u6211\u81EA\u5DF1\u5C31\u662F\u8FD9\u4E48\u4E00\u4E2A\u4F53\u4F1A\uFF0C\u6BCF\u5929\u770B\u5230\u5C0F\u4F19\u4F34\u4EEC\u5728\u7FA4\u91CC\u6253\u5361\uFF0C\u81EA\u5DF1\u603B\u611F\u89C9\u4E0D\u597D\u597D\u5B66\u4E60\u5C31\u5BF9\u4E0D\u8D77\u81EA\u5DF1\u2014\u2014\u5377\u7684\u5473\u9053\u5C31\u6709\u4E86\u5440\u3002</p><p>\u53EF\u80FD\u6709\u4E9B\u5C0F\u4F19\u4F34\u8FD8\u4E0D\u592A\u4E86\u89E3\u4EC0\u4E48\u662F\u77E5\u8BC6\u661F\u7403\uFF0C\u8FD9\u91CC\u7B80\u5355\u7ED9\u5927\u5BB6\u4ECB\u7ECD\u4E0B\u3002</p><h3 id="\u4E00\u3001\u4EC0\u4E48\u662F\u77E5\u8BC6\u661F\u7403" tabindex="-1"><a class="header-anchor" href="#\u4E00\u3001\u4EC0\u4E48\u662F\u77E5\u8BC6\u661F\u7403" aria-hidden="true">#</a> \u4E00\u3001\u4EC0\u4E48\u662F\u77E5\u8BC6\u661F\u7403</h3><p>\u7B80\u5355\u6765\u8BF4\uFF0C\u77E5\u8BC6\u661F\u7403\u5C31\u662F\u4E00\u4E2A\u79C1\u5BC6\u7684\u4EA4\u6D41\u5708\u5B50\uFF0C\u4E00\u5F00\u59CB\u771F\u7684\u5C31\u53EB\u5C0F\u5BC6\u5708\uFF0C\u4E3B\u8981\u7528\u9014\u5C31\u662F\u628A\u8BFB\u8005\u548C\u77E5\u8BC6\u521B\u4F5C\u8005\u94FE\u63A5\u8D77\u6765\u3002</p><p>\u76F8\u6BD4\u5FAE\u4FE1\u7FA4\u6216\u8005QQ\u7FA4\uFF0C\u77E5\u8BC6\u661F\u7403\u7684\u5185\u5BB9\u66F4\u5BB9\u6613\u6C89\u6DC0\uFF0C\u4FE1\u606F\u7BA1\u7406\u4E5F\u66F4\u9AD8\u6548\u3002</p><p>\u5728\u661F\u7403\u91CC\uFF0C\u4F60\u9664\u4E86\u53EF\u4EE5\u4EAB\u7528\u661F\u4E3B\u4E8C\u54E5\u63D0\u4F9B\u7684<strong>1V1 \u4E13\u5C5E\u95EE\u9898\u7B54\u590D\uFF0C\u5B66\u4E60\u8DEF\u7EBF/\u5B66\u4E60\u8D44\u6E90/\u804C\u573A\u7ECF\u9A8C</strong>\u5206\u4EAB\u5916\uFF0C\u8FD8\u53EF\u4EE5\u5171\u4EAB\u7403\u53CB\u7684\u5B66\u4E60\u7B14\u8BB0\uFF0C\u53C2\u4E0E\u6253\u5361\u6311\u6218\uFF0C\u548C\u4E00\u7FA4\u70ED\u7231\u5B66\u4E60\u7684\u5C0F\u4F19\u4F34\u4E92\u52A8\u4EA4\u6D41\uFF0C\u4ECE\u6B64\u53D8\u5F97\u4E50\u89C2\u79EF\u6781\uFF0C\u52A8\u529B\u6EE1\u6EE1\uFF0C\u5C31\u597D\u50CF\u6BCF\u5929\u56BC\u4E86\u4E24\u5757\u76CA\u8FBE\uFF0C\u5403\u4E86\u4E24\u6839\u58EB\u529B\u67B6\u4E00\u6837\u3002</p><p>\u5B66\u8D77\u6765\u66F4\u5E26\u52B2\u4E86\uFF0C\u5DE5\u4F5C\u8D77\u6765\u66F4\u987A\u5FC3\u4E86\uFF0C\u751A\u81F3\u4F60\u8FD8\u4F1A\u6536\u83B7\u4E00\u4EFD\u771F\u8BDA\u7684\u53CB\u8C0A\u3002</p><p>\u77E5\u8BC6\u661F\u7403\u652F\u6301\u624B\u673A\u7AEF APP\u3001\u5C0F\u7A0B\u5E8F\u548C\u7535\u8111\u7F51\u9875\u7AEF\uFF0C\u8BA9\u4F60\u968F\u65F6\u968F\u5730\u5206\u4EAB\u3001\u788E\u7247\u5316\u5B66\u4E60\uFF0C\u6BCF\u5929\u8BA4\u771F\u9605\u8BFB 10 \u5206\u949F\uFF0C\u4E00\u5E74\u540E\u4E00\u5B9A\u4F1A\u5927\u6709\u6240\u83B7\u3002</p><p>\u624B\u673A\u7AEF\u622A\u56FE\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhishixingqiu/readme-12.png" alt=""></p><p>\u7F51\u9875\u7248\u622A\u56FE\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhishixingqiu/readme-13.png" alt=""></p><h3 id="\u4E8C\u3001\u4E3A\u4EC0\u4E48\u8981\u505A\u77E5\u8BC6\u661F\u7403" tabindex="-1"><a class="header-anchor" href="#\u4E8C\u3001\u4E3A\u4EC0\u4E48\u8981\u505A\u77E5\u8BC6\u661F\u7403" aria-hidden="true">#</a> \u4E8C\u3001\u4E3A\u4EC0\u4E48\u8981\u505A\u77E5\u8BC6\u661F\u7403\uFF1F</h3><ol><li><p>\u4E3B\u8981\u7684\u76EE\u7684\u5C31\u662F\u501F\u52A9\u81EA\u8EAB\u7684\u8BA4\u77E5\uFF0C\u5207\u5B9E\u5730\u5E2E\u52A9\u5230\u6709\u9700\u8981\u7684\u5C0F\u4F19\u4F34\u3002</p></li><li><p>\u4E3A\u9700\u8981\u5E2E\u52A9\u7684\u5C0F\u4F19\u4F34\u63D0\u4F9B\u4E00\u4E2A\u53EF\u4EE5\u968F\u65F6\u63D0\u95EE\u5E76\u4E14\u80FD\u53CA\u65F6\u54CD\u5E94\u7684\u5E73\u53F0\u3002\u540C\u65F6\uFF0C\u6211\u4E5F\u4F1A\u5229\u7528\u81EA\u5DF1\u7684\u5F71\u54CD\u529B\uFF0C\u9080\u8BF7<strong>\u4E00\u6279\u884C\u4E1A\u5927\u5496\u5165\u9A7B\uFF0C\u7ED9\u5C0F\u4F19\u4F34\u63D0\u4F9B\u4E00\u4E2A\u8FD1\u8DDD\u79BB\u4EA4\u6D41\u5B66\u4E60\u7684\u673A\u4F1A</strong>\u3002</p></li></ol><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhishixingqiu/readme-14.jpeg" alt=""></p><p>\u76EE\u524D\u9080\u8BF7\u5230\u4E86 5 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start="3"><li><p>\u628A\u81EA\u5DF1\u5B66\u5230\u7684\u90A3\u90E8\u5206\u6700\u7CBE\u534E\u7684\u77E5\u8BC6\u6C89\u6DC0\u5206\u4EAB\u51FA\u6765\uFF0C\u8BA9\u66F4\u591A\u7684\u5C0F\u4F19\u4F34\u770B\u5F97\u5230\u3002</p></li><li><p>\u4E3A\u5B66\u4E60\u7F3A\u4E4F\u52A8\u529B\u3001\u7F3A\u4E4F\u76EE\u6807\u3001\u7F3A\u4E4F\u961F\u53CB\u6276\u6301\u7684\u5C0F\u4F19\u4F34\u63D0\u4F9B\u4E00\u4E2A\u53CB\u597D\u7684\u3001\u7EAF\u7CB9\u7684\u5B66\u4E60\u73AF\u5883\u3002</p></li></ol><p>\u661F\u7403\u539F\u4EF7\u4E3A <strong>99\u5143/\u5E74</strong>\uFF0C\u76EE\u524D\u7B2C\u4E00\u6CE2\u52A0\u5165\u7684\u5C0F\u4F19\u4F34\u9650\u65F6\u4F18\u60E0 <strong>30\u5143</strong>\uFF0C\u53EA\u9700 <strong>69\u5143\u4E00\u5E74</strong>\uFF0C\u540E\u9762\u4F1A\u968F\u7740\u4EBA\u6570\u7684\u589E\u591A\u6301\u7EED\u6DA8\u4EF7\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhishixingqiu/readme-11.png" alt=""></p><p>\u540D\u989D\u6709\u9650\uFF0C\u5148\u5230\u5148\u5F97\uFF0C<strong>\u4EC5\u9650\u8FD9\u4E00\u6CE2\u5C31\u6062\u590D\u539F\u4EF7</strong>\uFF0C\u8BF7\u957F\u6309\u4E0B\u9762\u7684\u6D77\u62A5\u626B\u7801\u52A0\u5165\uFF1A</p><h3 id="\u4E09\u3001\u661F\u7403\u80FD\u4E3A\u4F60\u63D0\u4F9B\u4EC0\u4E48" tabindex="-1"><a class="header-anchor" href="#\u4E09\u3001\u661F\u7403\u80FD\u4E3A\u4F60\u63D0\u4F9B\u4EC0\u4E48" aria-hidden="true">#</a> \u4E09\u3001\u661F\u7403\u80FD\u4E3A\u4F60\u63D0\u4F9B\u4EC0\u4E48\uFF1F</h3><p>\u52A0\u5165\u661F\u4E3B\u4E8C\u54E5\u7684\u661F\u7403\u540E\uFF0C\u4F60\u5C06\u83B7\u5F97\uFF1A</p><p><strong>1. \u514D\u8D39\u4E0B\u8F7D\u6D77\u91CF\u7F16\u7A0B\u5B66\u4E60\u8D44\u6599</strong>\uFF0C\u5305\u62EC\u661F\u4E3B\u4E8C\u54E5\u7684\u539F\u521B\u5B66\u4E60\u8D44\u6599\uFF0C\u6570\u5343\u672C\u4E2A\u65B9\u9762\u7684\u8BA1\u7B97\u673A\u7ECF\u5178\u7535\u5B50\u4E66\uFF0C\u4E3A\u6B64\uFF0C\u4E8C\u54E5\u8FD8\u7279\u610F\u5F00\u901A\u4E86 CSDN \u7684\u4ED8\u8D39\u4E0B\u8F7D\u4F1A\u5458\uFF0C\u53EF\u4EE5\u8BF4\uFF0C\u8FDB\u5165\u661F\u7403\u540E\uFF0C\u51E0\u4E4E\u4E0D\u7528\u518D\u4ECE\u5176\u4ED6\u5730\u65B9\u8D39\u52B2\u627E\u8D44\u6E90\u4E0B\u8F7D\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhishixingqiu/readme-15.png" alt=""></p><p><strong>2. 3 \u4EFD\u9AD8\u8D28\u91CF\u5C0F\u518C\u7684\u6C38\u4E45\u9605\u8BFB</strong>\uFF0C\u5185\u5BB9\u6DB5\u76D6\u7F16\u7A0B\u55B5\u5B9E\u6218\u9879\u76EE\u5F00\u53D1\u7B14\u8BB0\u3001Java\u9762\u8BD5\u6307\u5357\u3001LeetCode Java \u7248\u5237\u9898\u7B14\u8BB0\u7B49\u4F18\u8D28\u5185\u5BB9\uFF0C\u4EF7\u503C\u8FDC\u8D85\u95E8\u7968\uFF01</p><ul><li>\u7F16\u7A0B\u55B5\u5F00\u6E90 Spring Boot+Vue \u7684\u524D\u540E\u7AEF\u5206\u79BB\u9879\u76EE\u5B9E\u6218\u7B14\u8BB0\uFF0C\u4ECA\u5E74\u91CD\u70B9\u66F4\u65B0\u5185\u5BB9\u4E4B\u4E00\uFF0C\u540E\u9762\u6253\u7B97B\u7AD9\u76F4\u64AD\u5199 bug\uFF0C\u4E0D\uFF0C\u76F4\u64AD\u5199\u4EE3\u7801\uFF0C\u624B\u628A\u624B\u6559\u4EE3\u7801\u5B66\u7F16\u7A0B\u3002</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhishixingqiu/readme-16.png" alt=""></p><ul><li><strong>Java \u9762\u8BD5\u6307\u5357</strong>\uFF0C\u4ECA\u5E74\u91CD\u70B9\u66F4\u65B0\u5185\u5BB9\uFF0C\u6DB5\u76D6\u9762\u8BD5\u51C6\u5907\u7BC7\u3001\u6280\u672F\u9762\u8BD5\u9898\u7BC7\u3001\u9762\u7ECF\u7BC7\u3001\u804C\u573A\u4FEE\u70BC\u7BC7\u7B49\u7B49\u786C\u6838\u5185\u5BB9\u3002</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhishixingqiu/readme-17.png" alt=""></p><ul><li>LeetCode \u9898\u89E3 Java \u7248\uFF08\u6301\u7EED\u66F4\u65B0 300 \u9053\uFF09</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhishixingqiu/readme-18.png" alt=""></p><p><strong>3. \u7F16\u7A0B\u55B5\u55B5\u{1F431}\u5B9E\u6218\u9879\u76EE\u624B\u628A\u624B\u6559\uFF0C\u5E26\u4F60\u6210\u4E3A\u4E00\u540D\u516C\u53F8\u4E0D\u53EF\u6216\u7F3A\u7684\u6280\u672F\u5E72\u5C06</strong>\u3002\u6211\u4EEC\u6765\u770B\u4E00\u4E0B\u540E\u7AEF\u7684\u6280\u672F\u6808\u548C\u524D\u7AEF\u7684\u6280\u672F\u6808\uFF0C\u4E3B\u6D41\u6280\u672F\u4E00\u7F51\u6253\u5C3D\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhishixingqiu/readme-19.png" alt=""></p><ol start="4"><li>\u4E00\u5BF9\u4E00\u514D\u8D39\u63D0\u95EE\u4EA4\u6D41\uFF08\u6709\u95EE\u9898\u4F60\u5C3D\u7BA1\u95EE\uFF0C\u56DE\u7B54\u7EDD\u5BF9\u8D70\u5FC3\u5E72\u8D27\uFF0C\u4ECE\u6B64\u4E0D\u518D\u8FF7\u832B\u5F77\u5FA8\uFF0C\u6BD5\u7ADF\u4E8C\u54E5\u4E5F\u662F\u88AB\u8BFB\u8005\u5C0A\u79F0\u4E3A\u201C\u4EBA\u751F\u5BFC\u5E08\u201D\u7684\u7537\u4EBA\uFF09\u3002</li></ol><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhishixingqiu/readme-20.png" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhishixingqiu/readme-21.png" alt=""></p><ol start="5"><li><p>\u514D\u8D39\u7684\u7B80\u5386\u4FEE\u6539\u670D\u52A1\uFF08\u6BD5\u7ADF\u7B80\u5386\u5C31\u662F\u635E\u9762\u8BD5\u7684\u6572\u95E8\u7816\uFF0C\u4E00\u4EFD\u4F18\u8D28\u7684\u7B80\u5386\u5BF9\u6574\u4E2A\u804C\u4E1A\u751F\u6DAF\u81F3\u5173\u91CD\u8981\uFF09\u3002</p></li><li><p>\u6D77\u91CF\u7F16\u7A0B\u8D44\u6E90\u5206\u4EAB\uFF0C\u62D3\u5C55\u4F60\u7684\u8BA4\u77E5\u8FB9\u754C\uFF0C\u63D0\u9AD8\u4F60\u7684\u7F16\u7A0B\u80FD\u529B\uFF0C\u8BA9\u4F60\u6BCF\u5929\u90FD\u80FD\u8FDB\u6B65\u4EBF\u70B9\u70B9\u3002</p></li><li><p>\u8BFB\u4E66\u4EA4\u6D41\u3001\u5B66\u4E60\u4EA4\u6D41\uFF0C\u8BA9\u6211\u4EEC\u4E00\u8D77\u6784\u5EFA\u4E00\u4E2A\u7EAF\u7CB9\u7684\u5B66\u4E60\u4EA4\u6D41\u793E\u7FA4\u3002</p></li><li><p>\u4E0D\u5B9A\u671F\u798F\u5229\uFF1A\u4FC3\u5B66\u8BA1\u5212\u3001\u8282\u65E5\u62BD\u5956\u3001\u7EB8\u8D28\u4E66/\u4ED8\u8D39\u4E13\u680F\u9001\u9001\u9001\u3002</p></li></ol><p>\u5DF2\u7ECF\u6709\u7403\u53CB\u62FF\u5230\u4E86\u4E4B\u524D\u7684\u8D60\u4E66\u54C8\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhishixingqiu/readme-22.png" alt=""></p><h3 id="\u56DB\u3001\u5982\u4F55\u52A0\u5165" tabindex="-1"><a class="header-anchor" href="#\u56DB\u3001\u5982\u4F55\u52A0\u5165" aria-hidden="true">#</a> \u56DB\u3001\u5982\u4F55\u52A0\u5165\uFF1F</h3><p>\u661F\u7403\u7684\u5B9A\u4EF7\u4E3A <strong>99\u5143/\u5E74</strong>\uFF0C\u76EE\u524D\u7B2C\u4E00\u6CE2\u52A0\u5165\u7684\u5C0F\u4F19\u4F34\u9650\u65F6\u4F18\u60E0 <strong>30\u5143</strong>\uFF0C\u53EA\u9700 <strong>69\u5143\u4E00\u5E74</strong>\uFF0C\u540E\u9762\u4F1A\u968F\u7740\u4EBA\u6570\u7684\u589E\u591A\u6301\u7EED\u6DA8\u4EF7\u3002</p><p>\u540D\u989D\u6709\u9650\uFF0C\u5148\u5230\u5148\u5F97\uFF0C<strong>\u4EC5\u9650\u8FD9\u4E00\u6CE2\u5C31\u6062\u590D\u539F\u4EF7</strong>\uFF0C\u8BF7\u957F\u6309\u4E0B\u9762\u7684\u6D77\u62A5\u626B\u7801\u52A0\u5165\uFF08\u65E9\u4E70\u65E9\u4EAB\u53D7\uFF0C\u8FD8\u53EF\u4EE5\u62A2\u5230\u524D\u6392\u7F16\u53F7\uFF09\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhishixingqiu/readme-11.png" alt=""></p><p>\u8FDB\u5165\u661F\u7403\u540E\uFF0C\u53EF\u4EE5\u4E3A\u81EA\u5DF1\u5236\u5B9A\u4E00\u4E2A\u76EE\u6807\uFF0C\u6BD4\u5982\u8BF4\u591A\u957F\u65F6\u95F4\u5185\u8981\u52A0\u5165\u67D0\u67D0\u5FC3\u4EEA\u7684\u516C\u53F8\uFF0C\u6216\u8005\u8FBE\u6210\u67D0\u67D0\u503C\u5F97\u70AB\u8000\u7684\u6210\u5C31\uFF08\u4E00\u5B9A\u8981\u662F\u8FD8\u7B97\u6709\u70B9\u6311\u6218\u6027\u7684\u76EE\u6807\uFF09\u3002</p><p>\u5982\u679C\u4F60\u80FD\u6309\u671F\u8FBE\u6210\u4F60\u7684\u76EE\u6807\uFF0C\u6211\u4F1A\u5C06\u661F\u7403\u7684\u95E8\u7968\u9000\u8FD8\u7ED9\u4F60\u3002</p><p>\u8FDB\u5165\u661F\u7403\u540E\uFF0C\u4F60\u8FD8\u53EF\u4EE5\u6DFB\u52A0\u6211\u7684\u5FAE\u4FE1\uFF0C\u52A0\u5165\u661F\u7403\u4E13\u5C5E\u7684\u4EA4\u6D41\u7FA4\uFF0C\u975E\u8BDA\u52FF\u6270\uFF01</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhishixingqiu/readme-25.png" alt=""></p><p>\u4EB2\u773C\u76EE\u7779\u4E0B\u6211\u4EEC\u6BCF\u5929\u7684\u6B22\u4E50\uFF0C\u4E0D\uFF0C\u6BCF\u5929\u6C42\u77E5\u7684\u6001\u5EA6\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhishixingqiu/readme-23.png" alt=""></p><p><strong>\u771F\u8BDA\u6B22\u8FCE\u60F3\u8981\u8FDB\u9636\u63D0\u5347\u7684\u5C0F\u4F19\u4F34\u52A0\u5165\u661F\u7403\u4E00\u8D77\u4EA4\u6D41\uFF0C\u771F\u5FC3\u5E0C\u671B\u80FD\u5E2E\u52A9\u5230\u66F4\u591A\u7684\u5C0F\u4F19\u4F34</strong>\u3002</p><p><strong>\u52A0\u5165\u661F\u7403\u540E\u8BB0\u5F97\u770B\u7F6E\u9876\u4E3B\u9898\uFF0C\u4F60\u4F1A\u53D1\u73B0\u8FD9\u7968\u4EF7\u662F\u771F\u7684\u503C\uFF01</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhishixingqiu/readme-24.png" alt=""></p><p>\u770B\u5230\u8FD9\u5C31\u522B\u72B9\u8C6B\u4E86\uFF0C\u539F\u4EF7 99 \u5143\uFF0C\u9650\u65F6\u4F18\u60E0 69 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diff --git a/dist/assets/index.html.8360409e.js b/dist/assets/index.html.96eac070.js
similarity index 95%
rename from dist/assets/index.html.8360409e.js
rename to dist/assets/index.html.96eac070.js
index 29db1f40..024c4f39 100644
--- a/dist/assets/index.html.8360409e.js
+++ b/dist/assets/index.html.96eac070.js
@@ -1 +1 @@
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diff --git a/dist/assets/index.html.9c1a7487.js b/dist/assets/index.html.9c1a7487.js
new file mode 100644
index 00000000..57dc5e0b
--- /dev/null
+++ b/dist/assets/index.html.9c1a7487.js
@@ -0,0 +1 @@
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noreferrer"},et=e("JavaGuide"),dt=e("\uFF0C\u300CJava\u5B66\u4E60+\u9762\u8BD5\u6307\u5357\u300D\u4E00\u4EFD\u6DB5\u76D6\u5927\u90E8\u5206 Java \u7A0B\u5E8F\u5458\u6240\u9700\u8981\u638C\u63E1\u7684\u6838\u5FC3\u77E5\u8BC6\u3002\u51C6\u5907 Java \u9762\u8BD5\uFF0C\u9996\u9009 JavaGuide\uFF01"),rt=i('<h2 id="\u6350\u8D60\u9F13\u52B1" tabindex="-1"><a class="header-anchor" href="#\u6350\u8D60\u9F13\u52B1" aria-hidden="true">#</a> \u6350\u8D60\u9F13\u52B1</h2><p>\u5F00\u6E90\u4E0D\u6613\uFF0C\u5982\u679C\u300AJava \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF\u300B\u5BF9\u4F60\u6709\u4E9B\u5E2E\u52A9\uFF0C\u53EF\u4EE5\u8BF7\u4F5C\u8005\u559D\u676F\u5496\u5561\uFF0C\u7B97\u662F\u5BF9\u5F00\u6E90\u505A\u51FA\u7684\u4E00\u70B9\u70B9\u9F13\u52B1\u5427\uFF01</p><div align="left"><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/weixin-zhifu.png" width="260px"></div><p>\u{1F49D} \u611F\u8C22\u5927\u5BB6\u5BF9\u6211\u8D44\u91D1\u7684\u8D5E\u8D4F\uFF0C\u6BCF\u9694\u4E00\u4E2A\u6708\u4F1A\u7EDF\u8BA1\u4E00\u6B21\u3002</p><table><thead><tr><th>\u65F6\u95F4</th><th>\u5C0F\u4F19\u4F34</th><th>\u8D5E\u8D4F\u91D1\u989D</th></tr></thead><tbody><tr><td>2022-06-07</td><td>*\u52C7</td><td>1\u5143</td></tr><tr><td>2022-06-03</td><td>*\u5F20</td><td>1\u5143</td></tr><tr><td>2022-05-12</td><td>*\u70DF</td><td>10\u5143</td></tr><tr><td>2022-04-25</td><td>*\u601D</td><td>5\u5143</td></tr><tr><td>2022-04-20</td><td>w*n</td><td>1\u5143</td></tr><tr><td>2022-04-12</td><td>*\u751F</td><td>10\u5143</td></tr><tr><td>2022-03-04</td><td>\u8881*\u6CE2</td><td>99\u5143</td></tr><tr><td>2022-02-17</td><td>*\u8272</td><td>1\u5143</td></tr><tr><td>2022-02-17</td><td>M*y</td><td>1\u5143</td></tr><tr><td>2022-01-28</td><td>G*R</td><td>6.6\u5143</td></tr><tr><td>2022-01-20</td><td>*\u5149</td><td>50\u5143</td></tr><tr><td>2022-01-14</td><td>*\u6D69</td><td>1\u5143</td></tr><tr><td>2022-01-01</td><td>\u9A6C*\u8C0A</td><td>6.6\u5143</td></tr><tr><td>2022-01-01</td><td>\u521A*\u597D</td><td>3.6\u5143</td></tr><tr><td>2021-12-20</td><td>t*1</td><td>5 \u5143</td></tr><tr><td>2021-10-26</td><td>*\u9C7C</td><td>28 \u5143</td></tr><tr><td>2021-10-11</td><td>*\u4EBA</td><td>28 \u5143</td></tr><tr><td>2021-09-01</td><td>S*n</td><td>6.6 \u5143</td></tr><tr><td>2021-08-02</td><td>*\u79D2</td><td>1 \u5143</td></tr><tr><td>2021-06-13</td><td>*7</td><td>28 \u5143</td></tr><tr><td>2021-04-29</td><td>p*e</td><td>2 \u5143</td></tr></tbody></table><h2 id="\u53C2\u4E0E\u8D21\u732E" tabindex="-1"><a class="header-anchor" href="#\u53C2\u4E0E\u8D21\u732E" aria-hidden="true">#</a> \u53C2\u4E0E\u8D21\u732E</h2><ol><li>\u5982\u679C\u4F60\u5BF9\u672C\u9879\u76EE\u6709\u4EFB\u4F55\u5EFA\u8BAE\u6216\u53D1\u73B0\u6587\u4E2D\u5185\u5BB9\u6709\u8BEF\u7684\uFF0C\u6B22\u8FCE\u63D0\u4EA4 issues \u8FDB\u884C\u6307\u6B63\u3002</li><li>\u5BF9\u4E8E\u6587\u4E2D\u6211\u6CA1\u6709\u6D89\u53CA\u5230\u77E5\u8BC6\u70B9\uFF0C\u6B22\u8FCE\u63D0\u4EA4 PR\u3002</li></ol>',7);function at(ot,nt){const a=n("RouterLink"),r=n("ExternalLinkIcon");return l(),h("div",null,[c,t("ul",null,[t("li",null,[t("strong",null,[d(a,{to:"/zhishixingqiu/java-mianshi-zhinan.html"},{default:o(()=>[u]),_:1})]),p]),t("li",null,[t("strong",null,[t("a",f,[m,d(r)])]),g])]),b,t("ul",null,[t("li",null,[d(a,{to:"/xuexiluxian/"},{default:o(()=>[v]),_:1}),x]),t("li",null,[t("a",J,[w,d(r)]),k]),t("li",null,[t("a",B,[C,d(r)]),q]),t("li",null,[d(a,{to:"/sidebar/sanfene/nixi.html"},{default:o(()=>[y]),_:1}),G])]),z,t("ul",null,[t("li",null,[d(a,{to:"/download/java.html"},{default:o(()=>[S]),_:1})]),t("li",null,[t("a",j,[H,d(r)])]),t("li",null,[t("a",P,[R,d(r)])]),t("li",null,[t("a",T,[A,d(r)])]),t("li",null,[t("a",N,[L,d(r)])]),t("li",null,[t("a",V,[Q,d(r)])]),t("li",null,[d(a,{to:"/download/yuanyifeng-c-language.html"},{default:o(()=>[D]),_:1})]),t("li",null,[d(a,{to:"/download/bat-shuati.html"},{default:o(()=>[E]),_:1})]),t("li",null,[t("a",I,[K,d(r)])]),t("li",null,[d(a,{to:"/download/progit.html"},{default:o(()=>[M]),_:1})]),t("li",null,[d(a,{to:"/download/jianli.html"},{default:o(()=>[O]),_:1})])]),U,t("p",null,[t("a",F,[Z,d(r)])]),W,t("ul",null,[t("li",null,[t("a",Y,[X,d(r)]),$]),t("li",null,[t("a",tt,[et,d(r)]),dt])]),rt])}var lt=s(_,[["render",at],["__file","index.html.vue"]]);export{lt as default};
diff --git a/dist/assets/index.html.bc31ce34.js b/dist/assets/index.html.bc31ce34.js
new file mode 100644
index 00000000..db544546
--- /dev/null
+++ b/dist/assets/index.html.bc31ce34.js
@@ -0,0 +1 @@
+import{_ as e}from"./plugin-vue_export-helper.21dcd24c.js";import{o as t,c as a,e as r}from"./app.615e41d8.js";const i={},p=r('<p>\u5927\u5BB6\u597D\uFF0C\u6211\u662F\u4E8C\u54E5\u5440\u3002\u5728\u51C6\u5907\u4E86 3 \u4E2A\u591A\u6708\u540E\uFF0C\u6211\u7EC8\u4E8E\u51B3\u5B9A\u5728\u4ECA\u5929\u641E\u4E00\u4EF6\u5927\u4E8B\uFF1A<strong>\u6B63\u5F0F\u5F00\u653E\u6211\u7684\u7F16\u7A0B\u77E5\u8BC6\u661F\u7403\uFF08Java \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF\uFF09</strong>\uFF01</p><p>\u8FD9\u662F\u4E00\u4E2AJava \u5B66\u4E60\u6307\u5357+\u7F16\u7A0B\u5B9E\u6218\u7684\u5B66\u4E60\u5B9D\u5730\uFF0C\u53EF\u4EE5<strong>\u5E2E\u52A9\u4F60\u63D0\u9AD8\u7F16\u7A0B\u80FD\u529B\u3001\u517B\u6210\u597D\u7684\u5B66\u4E60\u4E60\u60EF\u3001\u627E\u5230\u5FD7\u540C\u9053\u5408\u7684\u5B66\u4E60\u4F19\u4F34\u3001\u62FF\u5230\u66F4\u597D\u7684 Offer</strong>\u3002</p><p>\u5BF9\u4E8E\u5927\u591A\u6570\u4EBA\u6765\u8BF4\uFF0C\u60F0\u6027\u662F\u4E0E\u751F\u4FF1\u6765\u7684\uFF0C\u90A3\u4E48\u5F53\u4F60\u5904\u5728\u8FD9\u6837\u4E00\u4E2A\u79EF\u6781\u7684\u5B66\u4E60\u6C1B\u56F4\u5F53\u4E2D\uFF0C\u5C31\u5F88\u5BB9\u6613\u53D7\u5230\u611F\u67D3\uFF0C\u6BCF\u5929\u4E0D\u8BA4\u771F\u5B66\u4E60\u70B9\uFF0C\u5C31\u603B\u4F1A\u611F\u89C9\u61CA\u607C\u3002</p><p>\u53CD\u6B63\u6211\u81EA\u5DF1\u5C31\u662F\u8FD9\u4E48\u4E00\u4E2A\u4F53\u4F1A\uFF0C\u6BCF\u5929\u770B\u5230\u5C0F\u4F19\u4F34\u4EEC\u5728\u7FA4\u91CC\u6253\u5361\uFF0C\u81EA\u5DF1\u603B\u611F\u89C9\u4E0D\u597D\u597D\u5B66\u4E60\u5C31\u5BF9\u4E0D\u8D77\u81EA\u5DF1\u2014\u2014\u5377\u7684\u5473\u9053\u5C31\u6709\u4E86\u5440\u3002</p><p>\u53EF\u80FD\u6709\u4E9B\u5C0F\u4F19\u4F34\u8FD8\u4E0D\u592A\u4E86\u89E3\u4EC0\u4E48\u662F\u77E5\u8BC6\u661F\u7403\uFF0C\u8FD9\u91CC\u7B80\u5355\u7ED9\u5927\u5BB6\u4ECB\u7ECD\u4E0B\u3002</p><h3 id="\u4E00\u3001\u4EC0\u4E48\u662F\u77E5\u8BC6\u661F\u7403" tabindex="-1"><a class="header-anchor" href="#\u4E00\u3001\u4EC0\u4E48\u662F\u77E5\u8BC6\u661F\u7403" aria-hidden="true">#</a> \u4E00\u3001\u4EC0\u4E48\u662F\u77E5\u8BC6\u661F\u7403</h3><p>\u7B80\u5355\u6765\u8BF4\uFF0C\u77E5\u8BC6\u661F\u7403\u5C31\u662F\u4E00\u4E2A\u79C1\u5BC6\u7684\u4EA4\u6D41\u5708\u5B50\uFF0C\u4E00\u5F00\u59CB\u771F\u7684\u5C31\u53EB\u5C0F\u5BC6\u5708\uFF0C\u4E3B\u8981\u7528\u9014\u5C31\u662F\u628A\u8BFB\u8005\u548C\u77E5\u8BC6\u521B\u4F5C\u8005\u94FE\u63A5\u8D77\u6765\u3002</p><p>\u76F8\u6BD4\u5FAE\u4FE1\u7FA4\u6216\u8005QQ\u7FA4\uFF0C\u77E5\u8BC6\u661F\u7403\u7684\u5185\u5BB9\u66F4\u5BB9\u6613\u6C89\u6DC0\uFF0C\u4FE1\u606F\u7BA1\u7406\u4E5F\u66F4\u9AD8\u6548\u3002</p><p>\u5728\u661F\u7403\u91CC\uFF0C\u4F60\u9664\u4E86\u53EF\u4EE5\u4EAB\u7528\u661F\u4E3B\u4E8C\u54E5\u63D0\u4F9B\u7684<strong>1V1 \u4E13\u5C5E\u95EE\u9898\u7B54\u590D\uFF0C\u5B66\u4E60\u8DEF\u7EBF/\u5B66\u4E60\u8D44\u6E90/\u804C\u573A\u7ECF\u9A8C</strong>\u5206\u4EAB\u5916\uFF0C\u8FD8\u53EF\u4EE5\u5171\u4EAB\u7403\u53CB\u7684\u5B66\u4E60\u7B14\u8BB0\uFF0C\u53C2\u4E0E\u6253\u5361\u6311\u6218\uFF0C\u548C\u4E00\u7FA4\u70ED\u7231\u5B66\u4E60\u7684\u5C0F\u4F19\u4F34\u4E92\u52A8\u4EA4\u6D41\uFF0C\u4ECE\u6B64\u53D8\u5F97\u4E50\u89C2\u79EF\u6781\uFF0C\u52A8\u529B\u6EE1\u6EE1\uFF0C\u5C31\u597D\u50CF\u6BCF\u5929\u56BC\u4E86\u4E24\u5757\u76CA\u8FBE\uFF0C\u5403\u4E86\u4E24\u6839\u58EB\u529B\u67B6\u4E00\u6837\u3002</p><p>\u5B66\u8D77\u6765\u66F4\u5E26\u52B2\u4E86\uFF0C\u5DE5\u4F5C\u8D77\u6765\u66F4\u987A\u5FC3\u4E86\uFF0C\u751A\u81F3\u4F60\u8FD8\u4F1A\u6536\u83B7\u4E00\u4EFD\u771F\u8BDA\u7684\u53CB\u8C0A\u3002</p><p>\u77E5\u8BC6\u661F\u7403\u652F\u6301\u624B\u673A\u7AEF APP\u3001\u5C0F\u7A0B\u5E8F\u548C\u7535\u8111\u7F51\u9875\u7AEF\uFF0C\u8BA9\u4F60\u968F\u65F6\u968F\u5730\u5206\u4EAB\u3001\u788E\u7247\u5316\u5B66\u4E60\uFF0C\u6BCF\u5929\u8BA4\u771F\u9605\u8BFB 10 \u5206\u949F\uFF0C\u4E00\u5E74\u540E\u4E00\u5B9A\u4F1A\u5927\u6709\u6240\u83B7\u3002</p><p>\u624B\u673A\u7AEF\u622A\u56FE\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhishixingqiu/readme-12.png" alt=""></p><p>\u7F51\u9875\u7248\u622A\u56FE\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhishixingqiu/readme-13.png" alt=""></p><h3 id="\u4E8C\u3001\u4E3A\u4EC0\u4E48\u8981\u505A\u77E5\u8BC6\u661F\u7403" tabindex="-1"><a class="header-anchor" href="#\u4E8C\u3001\u4E3A\u4EC0\u4E48\u8981\u505A\u77E5\u8BC6\u661F\u7403" aria-hidden="true">#</a> \u4E8C\u3001\u4E3A\u4EC0\u4E48\u8981\u505A\u77E5\u8BC6\u661F\u7403\uFF1F</h3><ol><li><p>\u4E3B\u8981\u7684\u76EE\u7684\u5C31\u662F\u501F\u52A9\u81EA\u8EAB\u7684\u8BA4\u77E5\uFF0C\u5207\u5B9E\u5730\u5E2E\u52A9\u5230\u6709\u9700\u8981\u7684\u5C0F\u4F19\u4F34\u3002</p></li><li><p>\u4E3A\u9700\u8981\u5E2E\u52A9\u7684\u5C0F\u4F19\u4F34\u63D0\u4F9B\u4E00\u4E2A\u53EF\u4EE5\u968F\u65F6\u63D0\u95EE\u5E76\u4E14\u80FD\u53CA\u65F6\u54CD\u5E94\u7684\u5E73\u53F0\u3002\u540C\u65F6\uFF0C\u6211\u4E5F\u4F1A\u5229\u7528\u81EA\u5DF1\u7684\u5F71\u54CD\u529B\uFF0C\u9080\u8BF7<strong>\u4E00\u6279\u884C\u4E1A\u5927\u5496\u5165\u9A7B\uFF0C\u7ED9\u5C0F\u4F19\u4F34\u63D0\u4F9B\u4E00\u4E2A\u8FD1\u8DDD\u79BB\u4EA4\u6D41\u5B66\u4E60\u7684\u673A\u4F1A</strong>\u3002</p></li></ol><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhishixingqiu/readme-14.jpeg" alt=""></p><p>\u76EE\u524D\u9080\u8BF7\u5230\u4E86 5 \u4F4D\u5609\u5BBE\uFF0C\u90FD\u662F\u4E8C\u54E5\u7684\u597D\u670B\u53CB\uFF0C\u884C\u4E1A\u5185\u7684\u9876\u5C16\u6280\u672F\u5927\u62FF\uFF1A</p><ul><li>Jack_Cui\uFF0CB \u7AD9\u77E5\u540D UP\uFF0C30 \u4E07\u7C89\u4E1D\uFF0C\u5927\u5382\u7B97\u6CD5\u5DE5\u7A0B\u5E08\u3002</li><li>Guide \u54E5\uFF0CGitHub \u661F\u6807 118k+\u5F00\u6E90\u9879\u76EE JavaGuide \u7684\u4F5C\u8005\u3002</li><li>\u68A6\u60F3de\u661F\u7A7A\uFF0CGitHub \u661F\u6807 50K+\u5F00\u6E90\u9879\u76EE mall \u7684\u4F5C\u8005\u3002</li><li>\u5C0F\u5085\u54E5\uFF0C\u7545\u9500\u4E66\u300A\u91CD\u5B66 Java \u8BBE\u8BA1\u6A21\u5F0F\u300B\u7684\u4F5C\u8005\u3002</li><li>\u82F1\u96C4\u54EA\u91CC\u51FA\u6765\uFF0CB \u7AD9\u7206\u7B11 UP\uFF0CCSDN 2022 \u5E74\u5EA6\u535A\u5BA2\u4E4B\u661F\u7B2C\u4E00\u540D\u3002</li></ul><ol start="3"><li><p>\u628A\u81EA\u5DF1\u5B66\u5230\u7684\u90A3\u90E8\u5206\u6700\u7CBE\u534E\u7684\u77E5\u8BC6\u6C89\u6DC0\u5206\u4EAB\u51FA\u6765\uFF0C\u8BA9\u66F4\u591A\u7684\u5C0F\u4F19\u4F34\u770B\u5F97\u5230\u3002</p></li><li><p>\u4E3A\u5B66\u4E60\u7F3A\u4E4F\u52A8\u529B\u3001\u7F3A\u4E4F\u76EE\u6807\u3001\u7F3A\u4E4F\u961F\u53CB\u6276\u6301\u7684\u5C0F\u4F19\u4F34\u63D0\u4F9B\u4E00\u4E2A\u53CB\u597D\u7684\u3001\u7EAF\u7CB9\u7684\u5B66\u4E60\u73AF\u5883\u3002</p></li></ol><p>\u661F\u7403\u539F\u4EF7\u4E3A <strong>99\u5143/\u5E74</strong>\uFF0C\u76EE\u524D\u7B2C\u4E00\u6CE2\u52A0\u5165\u7684\u5C0F\u4F19\u4F34\u9650\u65F6\u4F18\u60E0 <strong>30\u5143</strong>\uFF0C\u53EA\u9700 <strong>69\u5143\u4E00\u5E74</strong>\uFF0C\u540E\u9762\u4F1A\u968F\u7740\u4EBA\u6570\u7684\u589E\u591A\u6301\u7EED\u6DA8\u4EF7\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhishixingqiu/readme-11.png" alt=""></p><p>\u540D\u989D\u6709\u9650\uFF0C\u5148\u5230\u5148\u5F97\uFF0C<strong>\u4EC5\u9650\u8FD9\u4E00\u6CE2\u5C31\u6062\u590D\u539F\u4EF7</strong>\uFF0C\u8BF7\u957F\u6309\u4E0B\u9762\u7684\u6D77\u62A5\u626B\u7801\u52A0\u5165\uFF1A</p><h3 id="\u4E09\u3001\u661F\u7403\u80FD\u4E3A\u4F60\u63D0\u4F9B\u4EC0\u4E48" tabindex="-1"><a class="header-anchor" href="#\u4E09\u3001\u661F\u7403\u80FD\u4E3A\u4F60\u63D0\u4F9B\u4EC0\u4E48" aria-hidden="true">#</a> \u4E09\u3001\u661F\u7403\u80FD\u4E3A\u4F60\u63D0\u4F9B\u4EC0\u4E48\uFF1F</h3><p>\u52A0\u5165\u661F\u4E3B\u4E8C\u54E5\u7684\u661F\u7403\u540E\uFF0C\u4F60\u5C06\u83B7\u5F97\uFF1A</p><p><strong>1. \u514D\u8D39\u4E0B\u8F7D\u6D77\u91CF\u7F16\u7A0B\u5B66\u4E60\u8D44\u6599</strong>\uFF0C\u5305\u62EC\u661F\u4E3B\u4E8C\u54E5\u7684\u539F\u521B\u5B66\u4E60\u8D44\u6599\uFF0C\u6570\u5343\u672C\u4E2A\u65B9\u9762\u7684\u8BA1\u7B97\u673A\u7ECF\u5178\u7535\u5B50\u4E66\uFF0C\u4E3A\u6B64\uFF0C\u4E8C\u54E5\u8FD8\u7279\u610F\u5F00\u901A\u4E86 CSDN \u7684\u4ED8\u8D39\u4E0B\u8F7D\u4F1A\u5458\uFF0C\u53EF\u4EE5\u8BF4\uFF0C\u8FDB\u5165\u661F\u7403\u540E\uFF0C\u51E0\u4E4E\u4E0D\u7528\u518D\u4ECE\u5176\u4ED6\u5730\u65B9\u8D39\u52B2\u627E\u8D44\u6E90\u4E0B\u8F7D\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhishixingqiu/readme-15.png" alt=""></p><p><strong>2. 3 \u4EFD\u9AD8\u8D28\u91CF\u5C0F\u518C\u7684\u6C38\u4E45\u9605\u8BFB</strong>\uFF0C\u5185\u5BB9\u6DB5\u76D6\u7F16\u7A0B\u55B5\u5B9E\u6218\u9879\u76EE\u5F00\u53D1\u7B14\u8BB0\u3001Java\u9762\u8BD5\u6307\u5357\u3001LeetCode Java \u7248\u5237\u9898\u7B14\u8BB0\u7B49\u4F18\u8D28\u5185\u5BB9\uFF0C\u4EF7\u503C\u8FDC\u8D85\u95E8\u7968\uFF01</p><ul><li>\u7F16\u7A0B\u55B5\u5F00\u6E90 Spring Boot+Vue \u7684\u524D\u540E\u7AEF\u5206\u79BB\u9879\u76EE\u5B9E\u6218\u7B14\u8BB0\uFF0C\u4ECA\u5E74\u91CD\u70B9\u66F4\u65B0\u5185\u5BB9\u4E4B\u4E00\uFF0C\u540E\u9762\u6253\u7B97B\u7AD9\u76F4\u64AD\u5199 bug\uFF0C\u4E0D\uFF0C\u76F4\u64AD\u5199\u4EE3\u7801\uFF0C\u624B\u628A\u624B\u6559\u4EE3\u7801\u5B66\u7F16\u7A0B\u3002</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhishixingqiu/readme-16.png" alt=""></p><ul><li><strong>Java \u9762\u8BD5\u6307\u5357</strong>\uFF0C\u4ECA\u5E74\u91CD\u70B9\u66F4\u65B0\u5185\u5BB9\uFF0C\u6DB5\u76D6\u9762\u8BD5\u51C6\u5907\u7BC7\u3001\u6280\u672F\u9762\u8BD5\u9898\u7BC7\u3001\u9762\u7ECF\u7BC7\u3001\u804C\u573A\u4FEE\u70BC\u7BC7\u7B49\u7B49\u786C\u6838\u5185\u5BB9\u3002</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhishixingqiu/readme-17.png" alt=""></p><ul><li>LeetCode \u9898\u89E3 Java \u7248\uFF08\u6301\u7EED\u66F4\u65B0 300 \u9053\uFF09</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhishixingqiu/readme-18.png" alt=""></p><p><strong>3. \u7F16\u7A0B\u55B5\u55B5\u{1F431}\u5B9E\u6218\u9879\u76EE\u624B\u628A\u624B\u6559\uFF0C\u5E26\u4F60\u6210\u4E3A\u4E00\u540D\u516C\u53F8\u4E0D\u53EF\u6216\u7F3A\u7684\u6280\u672F\u5E72\u5C06</strong>\u3002\u6211\u4EEC\u6765\u770B\u4E00\u4E0B\u540E\u7AEF\u7684\u6280\u672F\u6808\u548C\u524D\u7AEF\u7684\u6280\u672F\u6808\uFF0C\u4E3B\u6D41\u6280\u672F\u4E00\u7F51\u6253\u5C3D\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhishixingqiu/readme-19.png" alt=""></p><ol start="4"><li>\u4E00\u5BF9\u4E00\u514D\u8D39\u63D0\u95EE\u4EA4\u6D41\uFF08\u6709\u95EE\u9898\u4F60\u5C3D\u7BA1\u95EE\uFF0C\u56DE\u7B54\u7EDD\u5BF9\u8D70\u5FC3\u5E72\u8D27\uFF0C\u4ECE\u6B64\u4E0D\u518D\u8FF7\u832B\u5F77\u5FA8\uFF0C\u6BD5\u7ADF\u4E8C\u54E5\u4E5F\u662F\u88AB\u8BFB\u8005\u5C0A\u79F0\u4E3A\u201C\u4EBA\u751F\u5BFC\u5E08\u201D\u7684\u7537\u4EBA\uFF09\u3002</li></ol><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhishixingqiu/readme-20.png" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhishixingqiu/readme-21.png" alt=""></p><ol start="5"><li><p>\u514D\u8D39\u7684\u7B80\u5386\u4FEE\u6539\u670D\u52A1\uFF08\u6BD5\u7ADF\u7B80\u5386\u5C31\u662F\u635E\u9762\u8BD5\u7684\u6572\u95E8\u7816\uFF0C\u4E00\u4EFD\u4F18\u8D28\u7684\u7B80\u5386\u5BF9\u6574\u4E2A\u804C\u4E1A\u751F\u6DAF\u81F3\u5173\u91CD\u8981\uFF09\u3002</p></li><li><p>\u6D77\u91CF\u7F16\u7A0B\u8D44\u6E90\u5206\u4EAB\uFF0C\u62D3\u5C55\u4F60\u7684\u8BA4\u77E5\u8FB9\u754C\uFF0C\u63D0\u9AD8\u4F60\u7684\u7F16\u7A0B\u80FD\u529B\uFF0C\u8BA9\u4F60\u6BCF\u5929\u90FD\u80FD\u8FDB\u6B65\u4EBF\u70B9\u70B9\u3002</p></li><li><p>\u8BFB\u4E66\u4EA4\u6D41\u3001\u5B66\u4E60\u4EA4\u6D41\uFF0C\u8BA9\u6211\u4EEC\u4E00\u8D77\u6784\u5EFA\u4E00\u4E2A\u7EAF\u7CB9\u7684\u5B66\u4E60\u4EA4\u6D41\u793E\u7FA4\u3002</p></li><li><p>\u4E0D\u5B9A\u671F\u798F\u5229\uFF1A\u4FC3\u5B66\u8BA1\u5212\u3001\u8282\u65E5\u62BD\u5956\u3001\u7EB8\u8D28\u4E66/\u4ED8\u8D39\u4E13\u680F\u9001\u9001\u9001\u3002</p></li></ol><p>\u5DF2\u7ECF\u6709\u7403\u53CB\u62FF\u5230\u4E86\u4E4B\u524D\u7684\u8D60\u4E66\u54C8\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhishixingqiu/readme-22.png" alt=""></p><h3 id="\u56DB\u3001\u5982\u4F55\u52A0\u5165" tabindex="-1"><a class="header-anchor" href="#\u56DB\u3001\u5982\u4F55\u52A0\u5165" aria-hidden="true">#</a> \u56DB\u3001\u5982\u4F55\u52A0\u5165\uFF1F</h3><p>\u661F\u7403\u7684\u5B9A\u4EF7\u4E3A <strong>99\u5143/\u5E74</strong>\uFF0C\u76EE\u524D\u7B2C\u4E00\u6CE2\u52A0\u5165\u7684\u5C0F\u4F19\u4F34\u9650\u65F6\u4F18\u60E0 <strong>30\u5143</strong>\uFF0C\u53EA\u9700 <strong>69\u5143\u4E00\u5E74</strong>\uFF0C\u540E\u9762\u4F1A\u968F\u7740\u4EBA\u6570\u7684\u589E\u591A\u6301\u7EED\u6DA8\u4EF7\u3002</p><p>\u540D\u989D\u6709\u9650\uFF0C\u5148\u5230\u5148\u5F97\uFF0C<strong>\u4EC5\u9650\u8FD9\u4E00\u6CE2\u5C31\u6062\u590D\u539F\u4EF7</strong>\uFF0C\u8BF7\u957F\u6309\u4E0B\u9762\u7684\u6D77\u62A5\u626B\u7801\u52A0\u5165\uFF08\u65E9\u4E70\u65E9\u4EAB\u53D7\uFF0C\u8FD8\u53EF\u4EE5\u62A2\u5230\u524D\u6392\u7F16\u53F7\uFF09\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhishixingqiu/readme-11.png" alt=""></p><p>\u8FDB\u5165\u661F\u7403\u540E\uFF0C\u53EF\u4EE5\u4E3A\u81EA\u5DF1\u5236\u5B9A\u4E00\u4E2A\u76EE\u6807\uFF0C\u6BD4\u5982\u8BF4\u591A\u957F\u65F6\u95F4\u5185\u8981\u52A0\u5165\u67D0\u67D0\u5FC3\u4EEA\u7684\u516C\u53F8\uFF0C\u6216\u8005\u8FBE\u6210\u67D0\u67D0\u503C\u5F97\u70AB\u8000\u7684\u6210\u5C31\uFF08\u4E00\u5B9A\u8981\u662F\u8FD8\u7B97\u6709\u70B9\u6311\u6218\u6027\u7684\u76EE\u6807\uFF09\u3002</p><p>\u5982\u679C\u4F60\u80FD\u6309\u671F\u8FBE\u6210\u4F60\u7684\u76EE\u6807\uFF0C\u6211\u4F1A\u5C06\u661F\u7403\u7684\u95E8\u7968\u9000\u8FD8\u7ED9\u4F60\u3002</p><p>\u8FDB\u5165\u661F\u7403\u540E\uFF0C\u4F60\u8FD8\u53EF\u4EE5\u6DFB\u52A0\u6211\u7684\u5FAE\u4FE1\uFF0C\u52A0\u5165\u661F\u7403\u4E13\u5C5E\u7684\u4EA4\u6D41\u7FA4\uFF0C\u975E\u8BDA\u52FF\u6270\uFF01</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhishixingqiu/readme-25.png" alt=""></p><p>\u4EB2\u773C\u76EE\u7779\u4E0B\u6211\u4EEC\u6BCF\u5929\u7684\u6B22\u4E50\uFF0C\u4E0D\uFF0C\u6BCF\u5929\u6C42\u77E5\u7684\u6001\u5EA6\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhishixingqiu/readme-23.png" alt=""></p><p><strong>\u771F\u8BDA\u6B22\u8FCE\u60F3\u8981\u8FDB\u9636\u63D0\u5347\u7684\u5C0F\u4F19\u4F34\u52A0\u5165\u661F\u7403\u4E00\u8D77\u4EA4\u6D41\uFF0C\u771F\u5FC3\u5E0C\u671B\u80FD\u5E2E\u52A9\u5230\u66F4\u591A\u7684\u5C0F\u4F19\u4F34</strong>\u3002</p><p><strong>\u52A0\u5165\u661F\u7403\u540E\u8BB0\u5F97\u770B\u7F6E\u9876\u4E3B\u9898\uFF0C\u4F60\u4F1A\u53D1\u73B0\u8FD9\u7968\u4EF7\u662F\u771F\u7684\u503C\uFF01</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhishixingqiu/readme-24.png" alt=""></p><p>\u770B\u5230\u8FD9\u5C31\u522B\u72B9\u8C6B\u4E86\uFF0C\u539F\u4EF7 99 \u5143\uFF0C\u9650\u65F6\u4F18\u60E0 69 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diff --git a/dist/assets/index.html.17715b69.js b/dist/assets/index.html.c95125a9.js
similarity index 95%
rename from dist/assets/index.html.17715b69.js
rename to dist/assets/index.html.c95125a9.js
index 4e7a444d..f564ca18 100644
--- a/dist/assets/index.html.17715b69.js
+++ b/dist/assets/index.html.c95125a9.js
@@ -1 +1 @@
-import{_ as s}from"./plugin-vue_export-helper.21dcd24c.js";import{r as a,o as r,c as i,a as e,b as n,d as o}from"./app.a0271b9c.js";const _={},c=e("p",null,"\u7CBE\u9009 Github \u548C Gitee \u4E0A\u4F18\u8D28\u7684 Java \u5F00\u6E90\u9879\u76EE\uFF0C\u5E0C\u671B\u80FD\u591F\u5E2E\u52A9\u5230\u4F60\u3002",-1),l=o("\u6B22\u8FCE\u5927\u5BB6\u5728 "),h={href:"https://github.com/CodingDocs/awesome-java/issues",target:"_blank",rel:"noopener noreferrer"},d=o("issues \u533A"),m=o("\u63A8\u8350\u81EA\u5DF1\u8BA4\u53EF\u7684 Java \u5F00\u6E90\u9879\u76EE\uFF0C\u8BA9\u6211\u4EEC\u5171\u540C\u7EF4\u62A4\u4E00\u4E2A\u4F18\u8D28\u7684 Java \u5F00\u6E90\u9879\u76EE\u7CBE\u9009\u96C6\uFF01"),u=o("Github \u5730\u5740\uFF1A"),p={href:"https://github.com/CodingDocs/awesome-java",target:"_blank",rel:"noopener noreferrer"},f=o("https://github.com/CodingDocs/awesome-java"),v=o("Gitee \u5730\u5740\uFF1A"),b={href:"https://gitee.com/SnailClimb/awesome-java",target:"_blank",rel:"noopener noreferrer"},g=o("https://gitee.com/SnailClimb/awesome-java"),x=e("p",null,"\u5982\u679C\u5185\u5BB9\u5BF9\u4F60\u6709\u5E2E\u52A9\u7684\u8BDD\uFF0C\u6B22\u8FCE\u7ED9\u672C\u9879\u76EE\u70B9\u4E2A Star\u3002\u6211\u4F1A\u7528\u6211\u7684\u4E1A\u4F59\u65F6\u95F4\u6301\u7EED\u5B8C\u5584\u8FD9\u4EFD\u540D\u5355\uFF0C\u611F\u8C22\uFF01",-1);function k(C,j){const t=a("ExternalLinkIcon");return r(),i("div",null,[c,e("p",null,[l,e("a",h,[d,n(t)]),m]),e("ul",null,[e("li",null,[u,e("a",p,[f,n(t)])]),e("li",null,[v,e("a",b,[g,n(t)])])]),x])}var B=s(_,[["render",k],["__file","index.html.vue"]]);export{B as default};
+import{_ as s}from"./plugin-vue_export-helper.21dcd24c.js";import{r as a,o as r,c as i,a as e,b as n,d as o}from"./app.615e41d8.js";const _={},c=e("p",null,"\u7CBE\u9009 Github \u548C Gitee \u4E0A\u4F18\u8D28\u7684 Java \u5F00\u6E90\u9879\u76EE\uFF0C\u5E0C\u671B\u80FD\u591F\u5E2E\u52A9\u5230\u4F60\u3002",-1),l=o("\u6B22\u8FCE\u5927\u5BB6\u5728 "),h={href:"https://github.com/CodingDocs/awesome-java/issues",target:"_blank",rel:"noopener noreferrer"},d=o("issues \u533A"),m=o("\u63A8\u8350\u81EA\u5DF1\u8BA4\u53EF\u7684 Java \u5F00\u6E90\u9879\u76EE\uFF0C\u8BA9\u6211\u4EEC\u5171\u540C\u7EF4\u62A4\u4E00\u4E2A\u4F18\u8D28\u7684 Java \u5F00\u6E90\u9879\u76EE\u7CBE\u9009\u96C6\uFF01"),u=o("Github \u5730\u5740\uFF1A"),p={href:"https://github.com/CodingDocs/awesome-java",target:"_blank",rel:"noopener noreferrer"},f=o("https://github.com/CodingDocs/awesome-java"),v=o("Gitee \u5730\u5740\uFF1A"),b={href:"https://gitee.com/SnailClimb/awesome-java",target:"_blank",rel:"noopener noreferrer"},g=o("https://gitee.com/SnailClimb/awesome-java"),x=e("p",null,"\u5982\u679C\u5185\u5BB9\u5BF9\u4F60\u6709\u5E2E\u52A9\u7684\u8BDD\uFF0C\u6B22\u8FCE\u7ED9\u672C\u9879\u76EE\u70B9\u4E2A Star\u3002\u6211\u4F1A\u7528\u6211\u7684\u4E1A\u4F59\u65F6\u95F4\u6301\u7EED\u5B8C\u5584\u8FD9\u4EFD\u540D\u5355\uFF0C\u611F\u8C22\uFF01",-1);function k(C,j){const t=a("ExternalLinkIcon");return r(),i("div",null,[c,e("p",null,[l,e("a",h,[d,n(t)]),m]),e("ul",null,[e("li",null,[u,e("a",p,[f,n(t)])]),e("li",null,[v,e("a",b,[g,n(t)])])]),x])}var B=s(_,[["render",k],["__file","index.html.vue"]]);export{B as default};
diff --git a/dist/assets/index.html.23006160.js b/dist/assets/index.html.efbaa943.js
similarity index 98%
rename from dist/assets/index.html.23006160.js
rename to dist/assets/index.html.efbaa943.js
index 2b105f9a..6a07f81a 100644
--- a/dist/assets/index.html.23006160.js
+++ b/dist/assets/index.html.efbaa943.js
@@ -1 +1 @@
-import{_ as r}from"./plugin-vue_export-helper.21dcd24c.js";import{r as o,o as n,c,a as e,b as i,e as h,d as a}from"./app.a0271b9c.js";const d={},p=h('<p>\u5927\u5BB6\u597D\uFF0C\u6211\u662F\u4E8C\u54E5\u5440\uFF01\u8FD9\u7BC7\u6587\u7AE0\u4F1A\u901A\u8FC7 QA \u7684\u5F62\u5F0F\u7B80\u5355\u4ECB\u7ECD\u4E00\u4E0B\u6211\u81EA\u5DF1\u3002</p><h2 id="\u4E00\u3001\u6211\u53D6\u5F97\u4E86\u54EA\u4E9B\u6210\u7EE9" tabindex="-1"><a class="header-anchor" href="#\u4E00\u3001\u6211\u53D6\u5F97\u4E86\u54EA\u4E9B\u6210\u7EE9" aria-hidden="true">#</a> \u4E00\u3001\u6211\u53D6\u5F97\u4E86\u54EA\u4E9B\u6210\u7EE9\uFF1F</h2><p>\u53C8\u5230\u4E86\u6652\u6210\u7EE9\u7684\u73AF\u8282\uFF0C\u771F\u8BA9\u4EBA\u8FEB\u4E0D\u53CA\u5F85\u554A\uFF08\u77A7\u6211\u8FD9\u8BE5\u6B7B\u7684\u81EA\u4FE1\uFF09\uFF01</p><h3 id="_01\u3001\u516C\u4F17\u53F7" tabindex="-1"><a class="header-anchor" href="#_01\u3001\u516C\u4F17\u53F7" aria-hidden="true">#</a> 01\u3001\u516C\u4F17\u53F7</h3><p>\u76EE\u524D\u6211\u7684\u539F\u521B\u516C\u4F17\u53F7\u201C<strong>\u6C89\u9ED8\u738B\u4E8C</strong>\u201D\u6709 10.5 \u4E07+ \u8BFB\u8005\u5173\u6CE8\uFF0C\u4E13\u6CE8\u4E8E\u5206\u4EAB\u786C\u6838\u7684 Java \u540E\u7AEF\u6280\u672F\u6587\u7AE0\u3002\u5E73\u5747\u9605\u8BFB 5500 \u5DE6\u53F3\uFF0C\u7EFC\u5408\u6392\u540D\u80FD\u6392\u5728\u5168\u56FD\u5F00\u53D1\u8005\u4E2D\u7684\u524D 50 \u540D\u5DE6\u53F3\uFF08\u6570\u636E\u6765\u6E90\u4E8E\u4E8C\u5341\u6B21\u5E42\uFF09\u3002</p><p>\u53EF\u4EE5\u5FAE\u4FE1\u641C\u7D22 <strong>\u6C89\u9ED8\u738B\u4E8C</strong> \u5173\u952E\u5B57\u6216\u8005\u626B\u7801\u76F4\u63A5\u5173\u6CE8\uFF0C\u5173\u6CE8\u540E\u56DE\u590D <strong>00</strong> \u8FD8\u53EF\u4EE5\u62C9\u53D6\u6211\u4E3A\u4F60\u7CBE\u5FC3\u51C6\u5907\u7684\u5B66\u4E60\u8D44\u6599\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/about-the-author/readme-34972eb2-f214-48db-a43e-c44918dfa23e.png" alt=""></p><p>\u5B66\u4E60\u8D44\u6599\u6709 BAT \u5927\u4F6C\u7684\u5237\u9898\u7B14\u8BB0\uFF0C\u6709\u300AJava \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF\u300B\u7684 PDF \u7248\u7535\u5B50\u4E66\u7B49\u7B49\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/about-the-author/readme-a3b81b80-03ec-470c-a9aa-ae8868e239cd.png" alt=""></p><h3 id="_02\u3001csdn" tabindex="-1"><a class="header-anchor" href="#_02\u3001csdn" aria-hidden="true">#</a> 02\u3001CSDN</h3><p>\u4E24\u5C4A\u535A\u5BA2\u4E4B\u661F\uFF0C\u603B\u699C\u524D 10 \u9009\u624B\uFF0C\u8BBF\u95EE\u91CF 1100 \u4E07+\uFF0C\u7C89\u4E1D 34 \u4E07+\uFF0C\u59A5\u59A5\u7684\u88C6\u90E8\u535A\u4E3B\uFF0C\u54E6\uFF0C\u4E0D\uFF0C\u5934\u90E8\u535A\u4E3B\u3002</p><blockquote><p>\u8BBF\u95EE\u5730\u5740\uFF1Ahttps://blog.csdn.net/qing_gee</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/about-the-author/readme-14fd83ec-db6e-4a6f-a8e9-8ce1ce0097c3.png" alt=""></p><h3 id="_03\u3001\u77E5\u4E4E" tabindex="-1"><a class="header-anchor" href="#_03\u3001\u77E5\u4E4E" aria-hidden="true">#</a> 03\u3001\u77E5\u4E4E</h3><p>LV9 \u9009\u624B\uFF0C\u9605\u8BFB\u603B\u6570\u8D85 1590 \u4E07\uFF0C\u4ECA\u5E74\u5377\u4E00\u5377\u7684\u8BDD\uFF0C\u7834 2000 \u4E07\u9605\u8BFB\u6CA1\u4EC0\u4E48\u95EE\u9898\u3002</p><blockquote><p>\u8BBF\u95EE\u5730\u5740\uFF1Ahttps://www.zhihu.com/people/cmower</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/about-the-author/readme-0fa19b6e-d06c-436b-bd11-1de8265c56bb.png" alt=""></p><h3 id="_04\u3001b-\u7AD9" tabindex="-1"><a class="header-anchor" href="#_04\u3001b-\u7AD9" aria-hidden="true">#</a> 04\u3001B \u7AD9</h3><p>B \u7AD9\u8FD8\u6BD4\u8F83\u83DC\uFF0C\u76EE\u524D\u53EA\u6709\u4E00\u4E2A 10 \u4E07+\u64AD\u653E\u91CF\u7684\u89C6\u9891\uFF0C\u7B49\u6211\u7684\u5F00\u6E90\u9879\u76EE\u7F16\u7A0B\u55B5\u55B5\u{1F431}\u5F00\u53D1\u5B8C\u7B2C\u4E00\u4E2A\u7248\u672C\u540E\uFF0C\u5F00\u59CB\u91CD\u65B0\u5377\u89C6\u9891\u3002</p><blockquote><p>\u8BBF\u95EE\u5730\u5740\uFF1Ahttps://space.bilibili.com/513340480</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/about-the-author/readme-5db6c62f-6194-4022-aee5-daf4d1a19f0c.png" alt=""></p><h3 id="_05\u3001github" tabindex="-1"><a class="header-anchor" href="#_05\u3001github" aria-hidden="true">#</a> 05\u3001GitHub</h3><p>\u76EE\u524D\u4E3B\u8981\u7EF4\u62A4\u7684\u300AJava \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF\u300B\u5F00\u6E90\u7248\u5728 GitHub \u4E0A\u6709 1.8k+ \u7684 star\uFF0C\u548C\u51FA\u7248\u793E\u7EA6\u5B9A\u7684\u662F\uFF0C\u8D85\u8FC7 1 \u4E07 star \u5C31\u51FA\u4E66\uFF0C\u5C0F\u4F19\u4F34\u4EEC\u53EF\u4EE5\u6765\u70B9\u8D5E\u652F\u6301\u4E0B\u3002</p><blockquote><p>\u8BBF\u95EE\u5730\u5740\uFF1Ahttps://github.com/itwanger/toBeBetterJavaer</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/about-the-author/readme-aa477206-41a9-4c55-a649-3d87ba1cb26b.png" alt=""></p><h3 id="_05\u3001\u77E5\u8BC6\u661F\u7403" tabindex="-1"><a class="header-anchor" href="#_05\u3001\u77E5\u8BC6\u661F\u7403" aria-hidden="true">#</a> 05\u3001\u77E5\u8BC6\u661F\u7403</h3><p>\u76EE\u524D\u8FD8\u5904\u5728\u8BD5\u8FD0\u8425\u9636\u6BB5\uFF0C\u6B63\u5728\u7B79\u5907\u661F\u7403\u7528\u6237\u4E13\u5C5E\u7684 5 \u4EFD\u5C0F\u518C\uFF0C\u8D28\u91CF\u9AD8\u7684\u4E00\u7B14\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/about-the-author/readme-c3dd1280-098e-460c-9a41-7d566976392b.png" alt=""></p><p>\u5185\u5BB9\u6DB5\u76D6\u5B9E\u6218\u9879\u76EE\u5F00\u53D1\u7B14\u8BB0\u3001\u9762\u8BD5\u6307\u5357\u3001Java\u5B66\u4E60\u3001LeetCode Java \u7248\u5237\u9898\u7B14\u8BB0\u7B49\u4F18\u8D28\u5185\u5BB9\uFF0C\u4EF7\u503C\u8FDC\u8D85\u95E8\u7968\uFF01</p><ul><li>\u7F16\u7A0B\u55B5\u55B5\u5F00\u6E90 Spring Boot+Vue \u7684\u524D\u540E\u7AEF\u5206\u79BB\u9879\u76EE\u5B9E\u6218\u7B14\u8BB0</li><li><strong>Java \u9762\u8BD5\u6307\u5357</strong>\uFF0C\u4ECA\u5E74\u91CD\u70B9\u66F4\u65B0\u5185\u5BB9\uFF0C\u6DB5\u76D6\u9762\u8BD5\u51C6\u5907\u7BC7\u3001\u6280\u672F\u9762\u8BD5\u9898\u7BC7\u3001\u9762\u7ECF\u7BC7\u3001\u804C\u573A\u4FEE\u70BC\u7BC7\u7B49\u7B49\u786C\u6838\u5185\u5BB9\u3002</li><li>Java \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF\u4F18\u5316\u91CD\u6784\u7248\uFF08\u661F\u7403\u4E13\u5C5E\uFF09</li><li>GitHub \u4E0A\u661F\u6807 147k+ \u7684 Java \u6559\u7A0B\uFF08\u66F4\u591A\u4F18\u8D28\u6559\u7A0B\u6301\u7EED\u66F4\u65B0\uFF09</li><li>LeetCode \u9898\u89E3 Java \u7248\uFF08\u6301\u7EED\u66F4\u65B0 300 \u9053\uFF09</li></ul><p>\u8FD9\u662F\u300AJava \u9762\u8BD5\u6307\u5357\u300B\u4E13\u680F\u76EE\u524D\u5DF2\u7ECF\u66F4\u65B0\u7684\u5185\u5BB9\uFF0C\u8BB2\u771F\uFF0C\u5C31\u8FD9\u4E00\u4E2A\u4E13\u680F\u5C31\u503C\u56DE\u7968\u4EF7\uFF08\u65B0\u4EBA\u4F18\u60E0\u4EF7\u53EA\u6709 69 \u5143\uFF09\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/about-the-author/readme-066ef990-a603-4ace-9a19-728eeb319924.png" alt=""></p><p>\u8FD8\u6709\u661F\u7403\u5185\u90E8\u6211\u4E5F\u5728\u575A\u6301\u6BCF\u5929\u66F4\u65B0\u4F18\u8D28\u7684\u5185\u5BB9\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/about-the-author/readme-e108c929-ebc5-4d75-8d40-825f6d027117.png" alt=""></p><p>\u559C\u6B22\u7684\u5C0F\u4F19\u4F34\u53EF\u4EE5\u76F4\u63A5\u626B\u7801\u52A0\u5165\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/itwanger/zhishixingqiu-youhui30yuan.png" alt=""></p><h2 id="\u4E8C\u3001\u4E3A\u4EC0\u4E48\u53EB\u6C89\u9ED8\u738B\u4E8C" tabindex="-1"><a class="header-anchor" href="#\u4E8C\u3001\u4E3A\u4EC0\u4E48\u53EB\u6C89\u9ED8\u738B\u4E8C" aria-hidden="true">#</a> \u4E8C\u3001\u4E3A\u4EC0\u4E48\u53EB\u6C89\u9ED8\u738B\u4E8C</h2><p>\u5176\u5B9E\u539F\u56E0\u5F88\u7B80\u5355\uFF0C\u6211\u4E2A\u4EBA\u6BD4\u8F83\u559C\u6B22\u738B\u5C0F\u6CE2\uFF0C\u5C0F\u6CE2\u662F\u4E2A\u7A0B\u5E8F\u5458\uFF0C\u8FD8\u662F\u4E2A\u4F5C\u5BB6\uFF0C\u5199\u7684\u5C0F\u8BF4\u548C\u6742\u6587\u6211\u90FD\u7279\u522B\u559C\u6B22\uFF0C\u6709\u4E00\u672C\u53EB\u300A\u6C89\u9ED8\u7684\u5927\u591A\u6570\u300B\uFF0C\u6211\u5C31\u53D6\u4E86\u6C89\u9ED8\u4E8C\u5B57\uFF0C\u300A\u9EC4\u91D1\u65F6\u4EE3\u300B\u91CC\u548C\u9648\u6E05\u626C\u641E\u7834\u978B\u7684\u7537\u4E3B\u5C31\u53EB\u738B\u4E8C\uFF0C\u52A0\u4E0A\u5C0F\u6CE2\u5728\u5BB6\u6392\u884C\u8001\u4E8C\uFF0C\u4E0A\u9762\u6709\u4E2A\u54E5\u54E5\uFF0C\u4E0B\u9762\u6709\u4E2A\u5F1F\u5F1F\uFF0C\u6240\u4EE5\u7EFC\u5408\u5230\u4E00\u8D77\u5C31\u53EB\u201C\u6C89\u9ED8\u738B\u4E8C\u201D\u4E86\u3002</p><h2 id="\u4E09\u3001\u4E3A\u4EC0\u4E48\u505A\u8FD9\u4E2A\u5F00\u6E90\u77E5\u8BC6\u5E93" tabindex="-1"><a class="header-anchor" href="#\u4E09\u3001\u4E3A\u4EC0\u4E48\u505A\u8FD9\u4E2A\u5F00\u6E90\u77E5\u8BC6\u5E93" aria-hidden="true">#</a> \u4E09\u3001\u4E3A\u4EC0\u4E48\u505A\u8FD9\u4E2A\u5F00\u6E90\u77E5\u8BC6\u5E93</h2><blockquote><p>[!NOTE] \u77E5\u8BC6\u5E93\u53D6\u540D <strong>toBeBetterJavaer</strong>\uFF0C\u5373 <strong>To Be Better Javaer</strong>\uFF0C\u610F\u4E3A\u300C\u6210\u4E3A\u4E00\u540D\u66F4\u597D\u7684 Java \u7A0B\u5E8F\u5458\u300D\uFF0C\u662F\u81EA\u5B66 Java \u4EE5\u6765\u6240\u6709\u539F\u521B\u6587\u7AE0\u548C\u5B66\u4E60\u8D44\u6599\u7684\u5927\u805A\u5408\u3002\u5185\u5BB9\u5305\u62EC Java \u57FA\u7840\u3001Java \u5E76\u53D1\u7F16\u7A0B\u3001Java \u865A\u62DF\u673A\u3001Java \u4F01\u4E1A\u7EA7\u5F00\u53D1\u3001Java \u9762\u8BD5\u7B49\u6838\u5FC3\u77E5\u8BC6\u70B9\u3002\u636E\u8BF4\u6BCF\u4E00\u4E2A\u4F18\u79C0\u7684 Java \u7A0B\u5E8F\u5458\u90FD\u559C\u6B22\u5979\uFF0C\u98CE\u8DA3\u5E7D\u9ED8\u3001\u901A\u4FD7\u6613\u61C2\u3002\u5B66 Java\uFF0C\u5C31\u8BA4\u51C6 Java \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF\u{1F604}\u3002</p><p>\u77E5\u8BC6\u5E93\u65E8\u5728\u4E3A\u5B66\u4E60 Java \u7684\u5C0F\u4F19\u4F34\u63D0\u4F9B\u4E00\u7CFB\u5217\uFF1A</p><ul><li><strong>\u4F18\u8D28\u7684\u539F\u521B Java \u6559\u7A0B</strong></li><li><strong>\u5168\u9762\u6E05\u6670\u7684 Java \u5B66\u4E60\u8DEF\u7EBF</strong></li><li><strong>\u514D\u8D39\u4F46\u9760\u8C31\u7684 Java \u5B66\u4E60\u8D44\u6599</strong></li><li><strong>\u7CBE\u9009\u7684 Java \u5C97\u6C42\u804C\u9762\u8BD5\u6307\u5357</strong></li><li><strong>Java \u4F01\u4E1A\u7EA7\u5F00\u53D1\u6240\u9700\u7684\u5FC5\u5907\u6280\u672F</strong></li></ul><p>\u8D60\u4EBA\u73AB\u7470\u624B\u6709\u4F59\u9999\u3002\u77E5\u8BC6\u5E93\u4F1A\u6301\u7EED\u4FDD\u6301<strong>\u66F4\u65B0</strong>\uFF0C\u6B22\u8FCE\u6536\u85CF\u54C1\u9274\uFF01</p></blockquote>',40),b=a("\u8BBF\u95EE\u5730\u5740\uFF1A"),s={href:"https://tobebetterjavaer.com",target:"_blank",rel:"noopener noreferrer"},l=a("https://tobebetterjavaer.com"),g=e("h2",{id:"\u56DB\u3001\u672A\u5B8C\u5F85\u7EED",tabindex:"-1"},[e("a",{class:"header-anchor",href:"#\u56DB\u3001\u672A\u5B8C\u5F85\u7EED","aria-hidden":"true"},"#"),a(" \u56DB\u3001\u672A\u5B8C\u5F85\u7EED")],-1);function u(m,v){const t=o("ExternalLinkIcon");return n(),c("div",null,[p,e("blockquote",null,[e("p",null,[b,e("a",s,[l,i(t)])])]),g])}var J=r(d,[["render",u],["__file","index.html.vue"]]);export{J as default};
+import{_ as r}from"./plugin-vue_export-helper.21dcd24c.js";import{r as o,o as n,c,a as e,b as i,e as h,d as a}from"./app.615e41d8.js";const d={},p=h('<p>\u5927\u5BB6\u597D\uFF0C\u6211\u662F\u4E8C\u54E5\u5440\uFF01\u8FD9\u7BC7\u6587\u7AE0\u4F1A\u901A\u8FC7 QA \u7684\u5F62\u5F0F\u7B80\u5355\u4ECB\u7ECD\u4E00\u4E0B\u6211\u81EA\u5DF1\u3002</p><h2 id="\u4E00\u3001\u6211\u53D6\u5F97\u4E86\u54EA\u4E9B\u6210\u7EE9" tabindex="-1"><a class="header-anchor" href="#\u4E00\u3001\u6211\u53D6\u5F97\u4E86\u54EA\u4E9B\u6210\u7EE9" aria-hidden="true">#</a> \u4E00\u3001\u6211\u53D6\u5F97\u4E86\u54EA\u4E9B\u6210\u7EE9\uFF1F</h2><p>\u53C8\u5230\u4E86\u6652\u6210\u7EE9\u7684\u73AF\u8282\uFF0C\u771F\u8BA9\u4EBA\u8FEB\u4E0D\u53CA\u5F85\u554A\uFF08\u77A7\u6211\u8FD9\u8BE5\u6B7B\u7684\u81EA\u4FE1\uFF09\uFF01</p><h3 id="_01\u3001\u516C\u4F17\u53F7" tabindex="-1"><a class="header-anchor" href="#_01\u3001\u516C\u4F17\u53F7" aria-hidden="true">#</a> 01\u3001\u516C\u4F17\u53F7</h3><p>\u76EE\u524D\u6211\u7684\u539F\u521B\u516C\u4F17\u53F7\u201C<strong>\u6C89\u9ED8\u738B\u4E8C</strong>\u201D\u6709 10.5 \u4E07+ \u8BFB\u8005\u5173\u6CE8\uFF0C\u4E13\u6CE8\u4E8E\u5206\u4EAB\u786C\u6838\u7684 Java \u540E\u7AEF\u6280\u672F\u6587\u7AE0\u3002\u5E73\u5747\u9605\u8BFB 5500 \u5DE6\u53F3\uFF0C\u7EFC\u5408\u6392\u540D\u80FD\u6392\u5728\u5168\u56FD\u5F00\u53D1\u8005\u4E2D\u7684\u524D 50 \u540D\u5DE6\u53F3\uFF08\u6570\u636E\u6765\u6E90\u4E8E\u4E8C\u5341\u6B21\u5E42\uFF09\u3002</p><p>\u53EF\u4EE5\u5FAE\u4FE1\u641C\u7D22 <strong>\u6C89\u9ED8\u738B\u4E8C</strong> \u5173\u952E\u5B57\u6216\u8005\u626B\u7801\u76F4\u63A5\u5173\u6CE8\uFF0C\u5173\u6CE8\u540E\u56DE\u590D <strong>00</strong> \u8FD8\u53EF\u4EE5\u62C9\u53D6\u6211\u4E3A\u4F60\u7CBE\u5FC3\u51C6\u5907\u7684\u5B66\u4E60\u8D44\u6599\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/about-the-author/readme-34972eb2-f214-48db-a43e-c44918dfa23e.png" alt=""></p><p>\u5B66\u4E60\u8D44\u6599\u6709 BAT \u5927\u4F6C\u7684\u5237\u9898\u7B14\u8BB0\uFF0C\u6709\u300AJava \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF\u300B\u7684 PDF \u7248\u7535\u5B50\u4E66\u7B49\u7B49\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/about-the-author/readme-a3b81b80-03ec-470c-a9aa-ae8868e239cd.png" alt=""></p><h3 id="_02\u3001csdn" tabindex="-1"><a class="header-anchor" href="#_02\u3001csdn" aria-hidden="true">#</a> 02\u3001CSDN</h3><p>\u4E24\u5C4A\u535A\u5BA2\u4E4B\u661F\uFF0C\u603B\u699C\u524D 10 \u9009\u624B\uFF0C\u8BBF\u95EE\u91CF 1100 \u4E07+\uFF0C\u7C89\u4E1D 34 \u4E07+\uFF0C\u59A5\u59A5\u7684\u88C6\u90E8\u535A\u4E3B\uFF0C\u54E6\uFF0C\u4E0D\uFF0C\u5934\u90E8\u535A\u4E3B\u3002</p><blockquote><p>\u8BBF\u95EE\u5730\u5740\uFF1Ahttps://blog.csdn.net/qing_gee</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/about-the-author/readme-14fd83ec-db6e-4a6f-a8e9-8ce1ce0097c3.png" alt=""></p><h3 id="_03\u3001\u77E5\u4E4E" tabindex="-1"><a class="header-anchor" href="#_03\u3001\u77E5\u4E4E" aria-hidden="true">#</a> 03\u3001\u77E5\u4E4E</h3><p>LV9 \u9009\u624B\uFF0C\u9605\u8BFB\u603B\u6570\u8D85 1590 \u4E07\uFF0C\u4ECA\u5E74\u5377\u4E00\u5377\u7684\u8BDD\uFF0C\u7834 2000 \u4E07\u9605\u8BFB\u6CA1\u4EC0\u4E48\u95EE\u9898\u3002</p><blockquote><p>\u8BBF\u95EE\u5730\u5740\uFF1Ahttps://www.zhihu.com/people/cmower</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/about-the-author/readme-0fa19b6e-d06c-436b-bd11-1de8265c56bb.png" alt=""></p><h3 id="_04\u3001b-\u7AD9" tabindex="-1"><a class="header-anchor" href="#_04\u3001b-\u7AD9" aria-hidden="true">#</a> 04\u3001B \u7AD9</h3><p>B \u7AD9\u8FD8\u6BD4\u8F83\u83DC\uFF0C\u76EE\u524D\u53EA\u6709\u4E00\u4E2A 10 \u4E07+\u64AD\u653E\u91CF\u7684\u89C6\u9891\uFF0C\u7B49\u6211\u7684\u5F00\u6E90\u9879\u76EE\u7F16\u7A0B\u55B5\u55B5\u{1F431}\u5F00\u53D1\u5B8C\u7B2C\u4E00\u4E2A\u7248\u672C\u540E\uFF0C\u5F00\u59CB\u91CD\u65B0\u5377\u89C6\u9891\u3002</p><blockquote><p>\u8BBF\u95EE\u5730\u5740\uFF1Ahttps://space.bilibili.com/513340480</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/about-the-author/readme-5db6c62f-6194-4022-aee5-daf4d1a19f0c.png" alt=""></p><h3 id="_05\u3001github" tabindex="-1"><a class="header-anchor" href="#_05\u3001github" aria-hidden="true">#</a> 05\u3001GitHub</h3><p>\u76EE\u524D\u4E3B\u8981\u7EF4\u62A4\u7684\u300AJava \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF\u300B\u5F00\u6E90\u7248\u5728 GitHub \u4E0A\u6709 1.8k+ \u7684 star\uFF0C\u548C\u51FA\u7248\u793E\u7EA6\u5B9A\u7684\u662F\uFF0C\u8D85\u8FC7 1 \u4E07 star \u5C31\u51FA\u4E66\uFF0C\u5C0F\u4F19\u4F34\u4EEC\u53EF\u4EE5\u6765\u70B9\u8D5E\u652F\u6301\u4E0B\u3002</p><blockquote><p>\u8BBF\u95EE\u5730\u5740\uFF1Ahttps://github.com/itwanger/toBeBetterJavaer</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/about-the-author/readme-aa477206-41a9-4c55-a649-3d87ba1cb26b.png" alt=""></p><h3 id="_05\u3001\u77E5\u8BC6\u661F\u7403" tabindex="-1"><a class="header-anchor" href="#_05\u3001\u77E5\u8BC6\u661F\u7403" aria-hidden="true">#</a> 05\u3001\u77E5\u8BC6\u661F\u7403</h3><p>\u76EE\u524D\u8FD8\u5904\u5728\u8BD5\u8FD0\u8425\u9636\u6BB5\uFF0C\u6B63\u5728\u7B79\u5907\u661F\u7403\u7528\u6237\u4E13\u5C5E\u7684 5 \u4EFD\u5C0F\u518C\uFF0C\u8D28\u91CF\u9AD8\u7684\u4E00\u7B14\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/about-the-author/readme-c3dd1280-098e-460c-9a41-7d566976392b.png" alt=""></p><p>\u5185\u5BB9\u6DB5\u76D6\u5B9E\u6218\u9879\u76EE\u5F00\u53D1\u7B14\u8BB0\u3001\u9762\u8BD5\u6307\u5357\u3001Java\u5B66\u4E60\u3001LeetCode Java \u7248\u5237\u9898\u7B14\u8BB0\u7B49\u4F18\u8D28\u5185\u5BB9\uFF0C\u4EF7\u503C\u8FDC\u8D85\u95E8\u7968\uFF01</p><ul><li>\u7F16\u7A0B\u55B5\u55B5\u5F00\u6E90 Spring Boot+Vue \u7684\u524D\u540E\u7AEF\u5206\u79BB\u9879\u76EE\u5B9E\u6218\u7B14\u8BB0</li><li><strong>Java \u9762\u8BD5\u6307\u5357</strong>\uFF0C\u4ECA\u5E74\u91CD\u70B9\u66F4\u65B0\u5185\u5BB9\uFF0C\u6DB5\u76D6\u9762\u8BD5\u51C6\u5907\u7BC7\u3001\u6280\u672F\u9762\u8BD5\u9898\u7BC7\u3001\u9762\u7ECF\u7BC7\u3001\u804C\u573A\u4FEE\u70BC\u7BC7\u7B49\u7B49\u786C\u6838\u5185\u5BB9\u3002</li><li>Java \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF\u4F18\u5316\u91CD\u6784\u7248\uFF08\u661F\u7403\u4E13\u5C5E\uFF09</li><li>GitHub \u4E0A\u661F\u6807 147k+ \u7684 Java \u6559\u7A0B\uFF08\u66F4\u591A\u4F18\u8D28\u6559\u7A0B\u6301\u7EED\u66F4\u65B0\uFF09</li><li>LeetCode \u9898\u89E3 Java \u7248\uFF08\u6301\u7EED\u66F4\u65B0 300 \u9053\uFF09</li></ul><p>\u8FD9\u662F\u300AJava \u9762\u8BD5\u6307\u5357\u300B\u4E13\u680F\u76EE\u524D\u5DF2\u7ECF\u66F4\u65B0\u7684\u5185\u5BB9\uFF0C\u8BB2\u771F\uFF0C\u5C31\u8FD9\u4E00\u4E2A\u4E13\u680F\u5C31\u503C\u56DE\u7968\u4EF7\uFF08\u65B0\u4EBA\u4F18\u60E0\u4EF7\u53EA\u6709 69 \u5143\uFF09\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/about-the-author/readme-066ef990-a603-4ace-9a19-728eeb319924.png" alt=""></p><p>\u8FD8\u6709\u661F\u7403\u5185\u90E8\u6211\u4E5F\u5728\u575A\u6301\u6BCF\u5929\u66F4\u65B0\u4F18\u8D28\u7684\u5185\u5BB9\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/about-the-author/readme-e108c929-ebc5-4d75-8d40-825f6d027117.png" alt=""></p><p>\u559C\u6B22\u7684\u5C0F\u4F19\u4F34\u53EF\u4EE5\u76F4\u63A5\u626B\u7801\u52A0\u5165\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/itwanger/zhishixingqiu-youhui30yuan.png" alt=""></p><h2 id="\u4E8C\u3001\u4E3A\u4EC0\u4E48\u53EB\u6C89\u9ED8\u738B\u4E8C" tabindex="-1"><a class="header-anchor" href="#\u4E8C\u3001\u4E3A\u4EC0\u4E48\u53EB\u6C89\u9ED8\u738B\u4E8C" aria-hidden="true">#</a> \u4E8C\u3001\u4E3A\u4EC0\u4E48\u53EB\u6C89\u9ED8\u738B\u4E8C</h2><p>\u5176\u5B9E\u539F\u56E0\u5F88\u7B80\u5355\uFF0C\u6211\u4E2A\u4EBA\u6BD4\u8F83\u559C\u6B22\u738B\u5C0F\u6CE2\uFF0C\u5C0F\u6CE2\u662F\u4E2A\u7A0B\u5E8F\u5458\uFF0C\u8FD8\u662F\u4E2A\u4F5C\u5BB6\uFF0C\u5199\u7684\u5C0F\u8BF4\u548C\u6742\u6587\u6211\u90FD\u7279\u522B\u559C\u6B22\uFF0C\u6709\u4E00\u672C\u53EB\u300A\u6C89\u9ED8\u7684\u5927\u591A\u6570\u300B\uFF0C\u6211\u5C31\u53D6\u4E86\u6C89\u9ED8\u4E8C\u5B57\uFF0C\u300A\u9EC4\u91D1\u65F6\u4EE3\u300B\u91CC\u548C\u9648\u6E05\u626C\u641E\u7834\u978B\u7684\u7537\u4E3B\u5C31\u53EB\u738B\u4E8C\uFF0C\u52A0\u4E0A\u5C0F\u6CE2\u5728\u5BB6\u6392\u884C\u8001\u4E8C\uFF0C\u4E0A\u9762\u6709\u4E2A\u54E5\u54E5\uFF0C\u4E0B\u9762\u6709\u4E2A\u5F1F\u5F1F\uFF0C\u6240\u4EE5\u7EFC\u5408\u5230\u4E00\u8D77\u5C31\u53EB\u201C\u6C89\u9ED8\u738B\u4E8C\u201D\u4E86\u3002</p><h2 id="\u4E09\u3001\u4E3A\u4EC0\u4E48\u505A\u8FD9\u4E2A\u5F00\u6E90\u77E5\u8BC6\u5E93" tabindex="-1"><a class="header-anchor" 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diff --git a/dist/assets/initializr.html.ae05e8c2.js b/dist/assets/initializr.html.47ddf572.js
similarity index 65%
rename from dist/assets/initializr.html.ae05e8c2.js
rename to dist/assets/initializr.html.47ddf572.js
index 1ff9d457..ebbad86f 100644
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+++ b/dist/assets/initializr.html.47ddf572.js
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diff --git a/dist/assets/initializr.html.8afcbffb.js b/dist/assets/initializr.html.8afcbffb.js
new file mode 100644
index 00000000..e76cc6e7
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@@ -0,0 +1,22 @@
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Uses Apache Tomcat as the default embedded container.\u300D</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/initializr-02.png" alt=""></p><p>\u8FD9\u9884\u793A\u7740\u6211\u4EEC\u4F1A\u91C7\u7528 SpringMVC \u5E76\u4E14\u4F7F\u7528 Tomcat \u4F5C\u4E3A\u9ED8\u8BA4\u670D\u52A1\u5668\u6765\u5F00\u53D1\u4E00\u4E2A Web \u9879\u76EE\u3002</p><p>\u7136\u540E\u70B9\u51FB\u5E95\u90E8\u7684\u300Cgenerate\u300D\u6309\u94AE\uFF0C\u5C31\u4F1A\u751F\u6210\u4E00\u4E2A Spring Boot \u521D\u59CB\u5316\u9879\u76EE\u7684\u538B\u7F29\u5305\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/initializr-03.png" alt=""></p><p>\u5982\u679C\u4F7F\u7528\u7684\u662F Intellij IDEA \u65D7\u8230\u7248\uFF0C\u53EF\u4EE5\u76F4\u63A5\u901A\u8FC7 Intellij IDEA \u65B0\u5EFA Spring Boot \u9879\u76EE\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/initializr-2d03d0a4-0e87-4cd3-974d-f35bc440bdf0.png" alt=""></p><h2 id="spring-boot-\u9879\u76EE\u7ED3\u6784\u5206\u6790" tabindex="-1"><a class="header-anchor" href="#spring-boot-\u9879\u76EE\u7ED3\u6784\u5206\u6790" aria-hidden="true">#</a> Spring Boot \u9879\u76EE\u7ED3\u6784\u5206\u6790</h2><p>\u89E3\u5F00\u538B\u7F29\u5305\uFF0C\u5E76\u5BFC\u5165\u5230 Intellij IDEA \u4E2D\uFF0C\u53EF\u4EE5\u770B\u5230 Spring Boot \u9879\u76EE\u7684\u76EE\u5F55\u7ED3\u6784\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/initializr-04.png" alt=""></p><p>\u53EF\u4EE5\u4F7F\u7528 <code>tree -CfL 3</code> \u547D\u4EE4\u4EE5\u6811\u72B6\u56FE\u5217\u51FA\u76EE\u5F55\u7684\u5185\u5BB9\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/initializr-05.png" alt=""></p><ul><li>src/main/java \u4E3A\u9879\u76EE\u7684\u5F00\u53D1\u76EE\u5F55\uFF0C\u4E1A\u52A1\u4EE3\u7801\u5728\u8FD9\u91CC\u5199\u3002</li><li>src/main/resources \u4E3A\u914D\u7F6E\u6587\u4EF6\u76EE\u5F55\uFF0C\u9759\u6001\u6587\u4EF6\u3001\u6A21\u677F\u6587\u4EF6\u548C\u914D\u7F6E\u6587\u4EF6\u90FD\u653E\u5728\u8FD9\u91CC\u3002 <ul><li>\u5B50\u76EE\u5F55 static \u7528\u4E8E\u5B58\u653E\u9759\u6001\u8D44\u6E90\u6587\u4EF6\uFF0C\u6BD4\u5982\u8BF4 JS\u3001CSS \u56FE\u7247\u7B49\u3002</li><li>\u5B50\u76EE\u5F55 templates \u7528\u4E8E\u5B58\u653E\u6A21\u677F\u6587\u4EF6\uFF0C\u6BD4\u5982\u8BF4 thymeleaf \u548C freemarker \u6587\u4EF6\u3002</li></ul></li><li>src/test/java \u4E3A\u6D4B\u8BD5\u7C7B\u6587\u4EF6\u76EE\u5F55\u3002</li><li>pom.xml \u7528\u6765\u7BA1\u7406\u9879\u76EE\u7684\u4F9D\u8D56\u548C\u6784\u5EFA\u3002</li></ul><h2 id="\u5982\u4F55\u542F\u52A8-\u90E8\u7F72-spring-boot-\u9879\u76EE" tabindex="-1"><a class="header-anchor" href="#\u5982\u4F55\u542F\u52A8-\u90E8\u7F72-spring-boot-\u9879\u76EE" aria-hidden="true">#</a> \u5982\u4F55\u542F\u52A8/\u90E8\u7F72 Spring Boot \u9879\u76EE</h2><p>\u7B2C\u4E00\u6B21\u542F\u52A8\uFF0C\u6211\u4E2A\u4EBA\u4E60\u60EF\u5728 main \u7C7B\u4E2D\u53F3\u952E\uFF0C\u5728\u5F39\u51FA\u7684\u53F3\u952E\u83DC\u5355\u8FD9\u79CD\u9009\u62E9\u300Crun ... main()\u300D\u542F\u52A8\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/initializr-06.png" alt=""></p><p>\u7ECF\u8FC7 2.5s \u5DE6\u53F3\u7684 build \u540E\uFF0C\u9879\u76EE\u542F\u52A8\u6210\u529F\u4E86\uFF0C\u53EF\u4EE5\u5728\u65E5\u5FD7\u4E2D\u770B\u5230 Web \u9879\u76EE\u662F\u4EE5 Tomcat \u4E3A\u5BB9\u5668\u7684\uFF0C\u9ED8\u8BA4\u7AEF\u53E3\u53F7\u4E3A 8080\uFF0C\u6839\u8DEF\u5F84\u4E3A\u7A7A\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/initializr-07.png" alt=""></p><p>\u8FD9\u8981\u6BD4\u4F20\u7EDF\u7684 Web \u9879\u76EE\u7701\u4E8B\u7701\u5FC3\u7701\u529B\uFF0C\u4E0D\u9700\u8981\u6253\u6210 war \u5305\uFF0C\u4E0D\u9700\u8981\u628A war \u5305\u653E\u5230 Tomcat \u7684 webapp \u76EE\u5F55\u4E0B\u518D\u542F\u52A8\u3002</p><p>\u90A3\u5982\u679C\u60F3\u628A\u9879\u76EE\u6253\u6210 jar \u5305\u653E\u5230\u670D\u52A1\u5668\u4E0A\uFF0C\u4EE5 <code>java -jar xxx.jar</code> \u5F62\u5F0F\u8FD0\u884C\u7684\u8BDD\uFF0C\u8BE5\u600E\u4E48\u505A\u5462\uFF1F</p><p>\u6253\u5F00 Terminal \u7EC8\u7AEF\uFF0C \u6267\u884C\u547D\u4EE4 <code>mvn clean package</code>\uFF0C\u7B49\u5F85\u6253\u5305\u7ED3\u679C\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/initializr-08.png" alt=""></p><p>\u6211\u4EEC\u7684\u9879\u76EE\u5728\u521D\u59CB\u5316\u7684\u65F6\u5019\u9009\u62E9\u7684\u662F Maven \u6784\u5EFA\u65B9\u5F0F\uFF0C\u6240\u4EE5 pom.xml \u6587\u4EF6\u4E2D\u4F1A\u5F15\u5165 spring-boot-maven-plugin \u63D2\u4EF6\u3002</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;build&gt;
+  &lt;plugins&gt;
+    &lt;plugin&gt;
+      &lt;groupId&gt;org.springframework.boot&lt;/groupId&gt;
+      &lt;artifactId&gt;spring-boot-maven-plugin&lt;/artifactId&gt;
+    &lt;/plugin&gt;
+  &lt;/plugins&gt;
+&lt;/build&gt;
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>\u56E0\u6B64\u6211\u4EEC\u5C31\u53EF\u4EE5\u5229\u7528 Maven \u547D\u4EE4\u6765\u5B8C\u6210\u9879\u76EE\u6253\u5305\uFF0C\u6253\u5305\u5B8C\u6210\u540E\uFF0C\u8FDB\u5165 target \u76EE\u5F55\u4E0B\uFF0C\u5C31\u53EF\u4EE5\u770B\u5230\u6253\u5305\u597D\u7684 jar \u5305\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/initializr-09.png" alt=""></p>`,31),z=t("\u5229\u7528\u7EC8\u7AEF\u5DE5\u5177 "),B={href:"https://mp.weixin.qq.com/s/HeUAPe4LqqjfzIeWDe8KIg",target:"_blank",rel:"noopener noreferrer"},I=t("Tabby"),k=t("\uFF0C\u5C06 jar \u5305\u4E0A\u4F20\u5230\u670D\u52A1\u5668\u3002"),J=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/initializr-10.png",alt:""})],-1),w=e("p",null,[t("\u6267\u884C "),e("code",null,"java -jar tobebetterjavaer-0.0.1-SNAPSHOT.jar"),t(" \u547D\u4EE4\u3002")],-1),D=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/initializr-11.png",alt:""})],-1),q=e("p",null,"what\uFF1F\uFF1F\uFF1F\uFF1F\uFF1F\uFF1F\u7ADF\u7136\u6CA1\u6709\u5B89\u88C5 JDK\u3002\u597D\u5427\uFF0C\u4E3A\u4E86\u5E26\u767D\u7968\u963F\u91CC\u4E91\u670D\u52A1\u5668\u7684\u5C0F\u4F19\u4F34\u4E00\u8D77\u5B66\u4E60 Linux\uFF0C\u6211\u4E0B\u4E86\u8840\u672C\u81EA\u5DF1\u4E70\u4E86\u4E00\u53F0\u96F6\u6DFB\u52A0\u7684\u670D\u52A1\u5668\u3002",-1),M=e("p",null,"PS\uFF1A\u9700\u8981\u5728 centos \u73AF\u5883\u4E0B\u5B89\u88C5 JDK \u7684\u5C0F\u4F19\u4F34\u53EF\u4EE5\u770B\u8FD9\u7BC7\u3002",-1),W={href:"https://segmentfault.com/a/1190000015389941",target:"_blank",rel:"noopener noreferrer"},T=t("https://segmentfault.com/a/1190000015389941"),K=r(`<p>\u5B89\u88C5\u597D JDK \u540E\uFF0C\u518D\u6B21\u6267\u884C\u547D\u4EE4\u5C31\u53EF\u4EE5\u770B\u5230 Spring Boot \u9879\u76EE\u53EF\u4EE5\u6B63\u5E38\u5728\u670D\u52A1\u5668\u4E0A\u8DD1\u8D77\u6765\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/initializr-12.png" alt=""></p><h2 id="\u7B2C\u4E00\u4E2Aweb\u9879\u76EE" tabindex="-1"><a class="header-anchor" href="#\u7B2C\u4E00\u4E2Aweb\u9879\u76EE" aria-hidden="true">#</a> \u7B2C\u4E00\u4E2AWeb\u9879\u76EE</h2><p>\u9879\u76EE\u65E2\u7136\u542F\u52A8\u6210\u529F\u4E86\uFF0C\u6211\u4EEC\u5728\u6D4F\u89C8\u5668\u91CC\u8BBF\u95EE 8080 \u7AEF\u53E3\u6D4B\u8BD5\u4E0B\u5427\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/initializr-13.png" alt=""></p><p>\u54A6\uFF0C\u7ADF\u7136 Whitelabel \u4E86\uFF0C\u8FD9\u4E2A 404 \u9875\u9762\u662F Spring Boot \u9ED8\u8BA4\u7684\u9519\u8BEF\u9875\u9762\uFF0C\u8868\u793A\u6211\u4EEC\u7684\u8BF7\u6C42\u5728 Web \u670D\u52A1\u4E2D\u4E0D\u5B58\u5728\u3002</p><p>\u90A3\u8BE5\u600E\u4E48\u529E\u5462\uFF1F</p><p>\u6211\u4EEC\u6765\u589E\u52A0\u4E00\u4E2A Controller \u6587\u4EF6\uFF0C\u7528\u6765\u5904\u7406 Web \u8BF7\u6C42\uFF0C\u5185\u5BB9\u5982\u4E0B\u3002</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>@Controller
+public class HelloController {
+    
+    @GetMapping(&quot;/hello&quot;)
+    @ResponseBody
+    public String hello() {
+        return &quot;hello, springboot&quot;;
+    }
+}
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>\u8FD9\u6BB5\u4EE3\u7801\u7684\u4E1A\u52A1\u903B\u8F91\u975E\u5E38\u7B80\u5355\uFF0C\u7528\u6237\u53D1\u9001 hello \u8BF7\u6C42\uFF0C\u670D\u52A1\u5668\u7AEF\u54CD\u5E94\u4E00\u4E2A\u201Chello, springboot\u201D\u56DE\u53BB\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/initializr-14.png" alt=""></p><p>OK\uFF0C\u73B0\u5728\u53EF\u4EE5\u8BBF\u95EE\u5230\u4E86\u3002\u4E5F\u5C31\u8868\u660E\u6211\u4EEC\u7684\u7B2C\u4E00\u4E2A Spring Boot \u9879\u76EE\u5F00\u53D1\u5B8C\u6210\u4E86\u3002</p><h2 id="\u70ED\u90E8\u7F72" tabindex="-1"><a class="header-anchor" href="#\u70ED\u90E8\u7F72" aria-hidden="true">#</a> \u70ED\u90E8\u7F72</h2><p>\u4F5C\u4E3A\u5F00\u53D1\u8005\uFF0C\u6211\u4EEC\u5E0C\u671B\u6BCF\u6B21\u4FEE\u6539\u4EE3\u7801\u540E\uFF0C\u4EE3\u7801\u80FD\u591F\u81EA\u52A8\u7F16\u8BD1\uFF0C\u670D\u52A1\u80FD\u591F\u81EA\u52A8\u91CD\u65B0\u52A0\u8F7D\uFF0C\u8FD9\u6837\u5C31\u7701\u53BB\u4E86\u91CD\u65B0\u8FD0\u884C\u4EE3\u7801\u7684\u70E6\u607C\u3002</p><p>\u90A3 spring-boot-devtools \u5C31\u662F\u8FD9\u6837\u7684\u4E00\u4E2A\u795E\u5668\uFF0C\u5F53\u6211\u4EEC\u628A\u5B83\u6DFB\u52A0\u5230\u9879\u76EE\u5F53\u4E2D\u540E\uFF0C\u65E0\u8BBA\u662F\u4EE3\u7801\u4FEE\u6539\uFF0C\u8FD8\u662F\u914D\u7F6E\u6587\u4EF6\u4FEE\u6539\uFF0C\u670D\u52A1\u90FD\u80FD\u591F\u79D2\u7EA7\u91CD\u8F7D\uFF08\u4FD7\u79F0\u70ED\u90E8\u7F72\uFF09\uFF0C\u8FD9\u5728\u6211\u4EEC\u5F00\u53D1\u7684\u65F6\u5019\uFF0C\u975E\u5E38\u6709\u7528\u3002</p><p>\u600E\u4E48\u624D\u80FD\u5F00\u542F\u70ED\u90E8\u7F72\u5462\uFF1F</p><p>\u7B2C\u4E00\u6B65\uFF0C\u5728 pom.xml \u6587\u4EF6\u4E2D\u6DFB\u52A0\u4F9D\u8D56\u3002</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
+    &lt;groupId&gt;org.springframework.boot&lt;/groupId&gt;
+    &lt;artifactId&gt;spring-boot-devtools&lt;/artifactId&gt;
+&lt;/dependency&gt;
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>\u7B2C\u4E8C\u6B65\uFF0C\u6CA1\u6709\u7B2C\u4E8C\u6B65\u4E86\uFF0C\u54C8\u54C8\u3002</p><p>\u76F4\u63A5\u4FEE\u6539\u4EE3\u7801\u6765\u4F53\u9A8C\u4E00\u4E0B\u5427\u3002\u6211\u4EEC\u4FEE\u6539 HelloController \u5185\u5BB9\u4E3A\uFF1A</p><hr>`,21),A=t("\u66F4\u591A\u5185\u5BB9\uFF0C\u53EA\u9488\u5BF9\u300AJava \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF\u300B\u661F\u7403\u7528\u6237\u5F00\u653E\uFF0C\u9700\u8981\u7684\u5C0F\u4F19\u4F34\u53EF\u4EE5"),C={href:"https://tobebetterjavaer.com/zhishixingqiu/",target:"_blank",rel:"noopener noreferrer"},V=t("\u6233\u94FE\u63A5\u{1F517}"),y=t("\u52A0\u5165\u6211\u4EEC\u7684\u661F\u7403\uFF0C\u4E00\u8D77\u5B66\u4E60\uFF0C\u4E00\u8D77\u5377\u3002\u3002"),P=e("strong",null,"\u7F16\u7A0B\u55B5",-1),E=t("\u{1F431}\u662F\u4E00\u4E2A Spring Boot+Vue \u7684\u524D\u540E\u7AEF\u5206\u79BB\u9879\u76EE\uFF0C\u878D\u5408\u4E86\u5E02\u9762\u4E0A\u7EDD\u5927\u591A\u6570\u6D41\u884C\u7684\u6280\u672F\u8981\u70B9\u3002\u901A\u8FC7\u5B66\u4E60\u5B9E\u6218\u9879\u76EE\uFF0C\u4F60\u53EF\u4EE5\u5C06\u6240\u5B66\u7684\u77E5\u8BC6\u901A\u8FC7\u5B9E\u8DF5\u8FDB\u884C\u68C0\u9A8C\u3001\u4F60\u53EF\u4EE5\u62D3\u5BBD\u81EA\u5DF1\u7684\u6280\u672F\u8FB9\u754C\uFF0C\u4F60\u53EF\u4EE5\u638C\u63E1\u4E00\u4E2A\u771F\u6B63\u7684\u5B9E\u6218\u9879\u76EE\u662F\u5982\u4F55\u4ECE 0 \u5230 1 \u7684\u3002"),L=e("hr",null,null,-1),G=e("h3",{id:"\u6E90\u7801\u8DEF\u5F84",tabindex:"-1"},[e("a",{class:"header-anchor",href:"#\u6E90\u7801\u8DEF\u5F84","aria-hidden":"true"},"#"),t(" \u6E90\u7801\u8DEF\u5F84")],-1),N=t("\u7F16\u7A0B\u55B5\uFF1A"),H={href:"https://github.com/itwanger/coding-more",target:"_blank",rel:"noopener noreferrer"},U=t("https://github.com/itwanger/coding-more"),O=t("helloworld\uFF1A"),R={href:"https://github.com/itwanger/codingmore-learning/tree/main/codingmore-helloword",target:"_blank",rel:"noopener noreferrer"},X=t("https://github.com/itwanger/codingmore-learning"),F=e("hr",null,null,-1),Q=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png",alt:""})],-1);function Y(Z,$){const i=a("ExternalLinkIcon");return l(),s("div",null,[c,d,e("blockquote",null,[e("p",null,[e("a",g,[b,n(i)])])]),h,m,u,v,e("p",null,[_,e("a",j,[f,n(i)]),S]),x,e("p",null,[z,e("a",B,[I,n(i)]),k]),J,w,D,q,M,e("blockquote",null,[e("p",null,[e("a",W,[T,n(i)])])]),K,e("p",null,[A,e("a",C,[V,n(i)]),y,P,E]),L,G,e("blockquote",null,[e("ul",null,[e("li",null,[N,e("a",H,[U,n(i)])]),e("li",null,[O,e("a",R,[X,n(i)])])])]),F,Q])}var ie=o(p,[["render",Y],["__file","initializr.html.vue"]]);export{ie as default};
diff --git a/dist/assets/initializr.html.8cd24dbb.js b/dist/assets/initializr.html.8cd24dbb.js
deleted file mode 100644
index c4f795bd..00000000
--- a/dist/assets/initializr.html.8cd24dbb.js
+++ /dev/null
@@ -1,22 +0,0 @@
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Uses Apache Tomcat as the default embedded container.\u300D</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/initializr-02.png" alt=""></p><p>\u8FD9\u9884\u793A\u7740\u6211\u4EEC\u4F1A\u91C7\u7528 SpringMVC \u5E76\u4E14\u4F7F\u7528 Tomcat \u4F5C\u4E3A\u9ED8\u8BA4\u670D\u52A1\u5668\u6765\u5F00\u53D1\u4E00\u4E2A Web \u9879\u76EE\u3002</p><p>\u7136\u540E\u70B9\u51FB\u5E95\u90E8\u7684\u300Cgenerate\u300D\u6309\u94AE\uFF0C\u5C31\u4F1A\u751F\u6210\u4E00\u4E2A Spring Boot \u521D\u59CB\u5316\u9879\u76EE\u7684\u538B\u7F29\u5305\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/initializr-03.png" alt=""></p><p>\u5982\u679C\u4F7F\u7528\u7684\u662F Intellij IDEA \u65D7\u8230\u7248\uFF0C\u53EF\u4EE5\u76F4\u63A5\u901A\u8FC7 Intellij IDEA \u65B0\u5EFA Spring Boot \u9879\u76EE\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/initializr-2d03d0a4-0e87-4cd3-974d-f35bc440bdf0.png" alt=""></p><h3 id="spring-boot-\u9879\u76EE\u7ED3\u6784\u5206\u6790" tabindex="-1"><a class="header-anchor" href="#spring-boot-\u9879\u76EE\u7ED3\u6784\u5206\u6790" aria-hidden="true">#</a> Spring Boot \u9879\u76EE\u7ED3\u6784\u5206\u6790</h3><p>\u89E3\u5F00\u538B\u7F29\u5305\uFF0C\u5E76\u5BFC\u5165\u5230 Intellij IDEA \u4E2D\uFF0C\u53EF\u4EE5\u770B\u5230 Spring Boot \u9879\u76EE\u7684\u76EE\u5F55\u7ED3\u6784\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/initializr-04.png" alt=""></p><p>\u53EF\u4EE5\u4F7F\u7528 <code>tree -CfL 3</code> \u547D\u4EE4\u4EE5\u6811\u72B6\u56FE\u5217\u51FA\u76EE\u5F55\u7684\u5185\u5BB9\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/initializr-05.png" alt=""></p><ul><li>src/main/java \u4E3A\u9879\u76EE\u7684\u5F00\u53D1\u76EE\u5F55\uFF0C\u4E1A\u52A1\u4EE3\u7801\u5728\u8FD9\u91CC\u5199\u3002</li><li>src/main/resources \u4E3A\u914D\u7F6E\u6587\u4EF6\u76EE\u5F55\uFF0C\u9759\u6001\u6587\u4EF6\u3001\u6A21\u677F\u6587\u4EF6\u548C\u914D\u7F6E\u6587\u4EF6\u90FD\u653E\u5728\u8FD9\u91CC\u3002 <ul><li>\u5B50\u76EE\u5F55 static \u7528\u4E8E\u5B58\u653E\u9759\u6001\u8D44\u6E90\u6587\u4EF6\uFF0C\u6BD4\u5982\u8BF4 JS\u3001CSS \u56FE\u7247\u7B49\u3002</li><li>\u5B50\u76EE\u5F55 templates \u7528\u4E8E\u5B58\u653E\u6A21\u677F\u6587\u4EF6\uFF0C\u6BD4\u5982\u8BF4 thymeleaf \u548C freemarker \u6587\u4EF6\u3002</li></ul></li><li>src/test/java \u4E3A\u6D4B\u8BD5\u7C7B\u6587\u4EF6\u76EE\u5F55\u3002</li><li>pom.xml \u7528\u6765\u7BA1\u7406\u9879\u76EE\u7684\u4F9D\u8D56\u548C\u6784\u5EFA\u3002</li></ul><h3 id="\u5982\u4F55\u542F\u52A8-\u90E8\u7F72-spring-boot-\u9879\u76EE" tabindex="-1"><a class="header-anchor" href="#\u5982\u4F55\u542F\u52A8-\u90E8\u7F72-spring-boot-\u9879\u76EE" aria-hidden="true">#</a> \u5982\u4F55\u542F\u52A8/\u90E8\u7F72 Spring Boot \u9879\u76EE</h3><p>\u7B2C\u4E00\u6B21\u542F\u52A8\uFF0C\u6211\u4E2A\u4EBA\u4E60\u60EF\u5728 main \u7C7B\u4E2D\u53F3\u952E\uFF0C\u5728\u5F39\u51FA\u7684\u53F3\u952E\u83DC\u5355\u8FD9\u79CD\u9009\u62E9\u300Crun ... main()\u300D\u542F\u52A8\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/initializr-06.png" alt=""></p><p>\u7ECF\u8FC7 2.5s \u5DE6\u53F3\u7684 build \u540E\uFF0C\u9879\u76EE\u542F\u52A8\u6210\u529F\u4E86\uFF0C\u53EF\u4EE5\u5728\u65E5\u5FD7\u4E2D\u770B\u5230 Web \u9879\u76EE\u662F\u4EE5 Tomcat \u4E3A\u5BB9\u5668\u7684\uFF0C\u9ED8\u8BA4\u7AEF\u53E3\u53F7\u4E3A 8080\uFF0C\u6839\u8DEF\u5F84\u4E3A\u7A7A\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/initializr-07.png" alt=""></p><p>\u8FD9\u8981\u6BD4\u4F20\u7EDF\u7684 Web \u9879\u76EE\u7701\u4E8B\u7701\u5FC3\u7701\u529B\uFF0C\u4E0D\u9700\u8981\u6253\u6210 war \u5305\uFF0C\u4E0D\u9700\u8981\u628A war \u5305\u653E\u5230 Tomcat \u7684 webapp \u76EE\u5F55\u4E0B\u518D\u542F\u52A8\u3002</p><p>\u90A3\u5982\u679C\u60F3\u628A\u9879\u76EE\u6253\u6210 jar \u5305\u653E\u5230\u670D\u52A1\u5668\u4E0A\uFF0C\u4EE5 <code>java -jar xxx.jar</code> \u5F62\u5F0F\u8FD0\u884C\u7684\u8BDD\uFF0C\u8BE5\u600E\u4E48\u505A\u5462\uFF1F</p><p>\u6253\u5F00 Terminal \u7EC8\u7AEF\uFF0C \u6267\u884C\u547D\u4EE4 <code>mvn clean package</code>\uFF0C\u7B49\u5F85\u6253\u5305\u7ED3\u679C\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/initializr-08.png" alt=""></p><p>\u6211\u4EEC\u7684\u9879\u76EE\u5728\u521D\u59CB\u5316\u7684\u65F6\u5019\u9009\u62E9\u7684\u662F Maven \u6784\u5EFA\u65B9\u5F0F\uFF0C\u6240\u4EE5 pom.xml \u6587\u4EF6\u4E2D\u4F1A\u5F15\u5165 spring-boot-maven-plugin \u63D2\u4EF6\u3002</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;build&gt;
-  &lt;plugins&gt;
-    &lt;plugin&gt;
-      &lt;groupId&gt;org.springframework.boot&lt;/groupId&gt;
-      &lt;artifactId&gt;spring-boot-maven-plugin&lt;/artifactId&gt;
-    &lt;/plugin&gt;
-  &lt;/plugins&gt;
-&lt;/build&gt;
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>\u56E0\u6B64\u6211\u4EEC\u5C31\u53EF\u4EE5\u5229\u7528 Maven \u547D\u4EE4\u6765\u5B8C\u6210\u9879\u76EE\u6253\u5305\uFF0C\u6253\u5305\u5B8C\u6210\u540E\uFF0C\u8FDB\u5165 target \u76EE\u5F55\u4E0B\uFF0C\u5C31\u53EF\u4EE5\u770B\u5230\u6253\u5305\u597D\u7684 jar \u5305\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/initializr-09.png" alt=""></p>`,31),I=t("\u5229\u7528\u7EC8\u7AEF\u5DE5\u5177 "),k={href:"https://mp.weixin.qq.com/s/HeUAPe4LqqjfzIeWDe8KIg",target:"_blank",rel:"noopener noreferrer"},J=t("Tabby"),w=t("\uFF0C\u5C06 jar \u5305\u4E0A\u4F20\u5230\u670D\u52A1\u5668\u3002"),D=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/initializr-10.png",alt:""})],-1),q=e("p",null,[t("\u6267\u884C "),e("code",null,"java -jar tobebetterjavaer-0.0.1-SNAPSHOT.jar"),t(" \u547D\u4EE4\u3002")],-1),M=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/initializr-11.png",alt:""})],-1),W=e("p",null,"what\uFF1F\uFF1F\uFF1F\uFF1F\uFF1F\uFF1F\u7ADF\u7136\u6CA1\u6709\u5B89\u88C5 JDK\u3002\u597D\u5427\uFF0C\u4E3A\u4E86\u5E26\u767D\u7968\u963F\u91CC\u4E91\u670D\u52A1\u5668\u7684\u5C0F\u4F19\u4F34\u4E00\u8D77\u5B66\u4E60 Linux\uFF0C\u6211\u4E0B\u4E86\u8840\u672C\u81EA\u5DF1\u4E70\u4E86\u4E00\u53F0\u96F6\u6DFB\u52A0\u7684\u670D\u52A1\u5668\u3002",-1),T=e("p",null,"PS\uFF1A\u9700\u8981\u5728 centos \u73AF\u5883\u4E0B\u5B89\u88C5 JDK \u7684\u5C0F\u4F19\u4F34\u53EF\u4EE5\u770B\u8FD9\u7BC7\u3002",-1),C={href:"https://segmentfault.com/a/1190000015389941",target:"_blank",rel:"noopener noreferrer"},K=t("https://segmentfault.com/a/1190000015389941"),A=o(`<p>\u5B89\u88C5\u597D JDK \u540E\uFF0C\u518D\u6B21\u6267\u884C\u547D\u4EE4\u5C31\u53EF\u4EE5\u770B\u5230 Spring Boot \u9879\u76EE\u53EF\u4EE5\u6B63\u5E38\u5728\u670D\u52A1\u5668\u4E0A\u8DD1\u8D77\u6765\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/initializr-12.png" alt=""></p><h3 id="\u7B2C\u4E00\u4E2Aweb\u9879\u76EE" tabindex="-1"><a class="header-anchor" href="#\u7B2C\u4E00\u4E2Aweb\u9879\u76EE" aria-hidden="true">#</a> \u7B2C\u4E00\u4E2AWeb\u9879\u76EE</h3><p>\u9879\u76EE\u65E2\u7136\u542F\u52A8\u6210\u529F\u4E86\uFF0C\u6211\u4EEC\u5728\u6D4F\u89C8\u5668\u91CC\u8BBF\u95EE 8080 \u7AEF\u53E3\u6D4B\u8BD5\u4E0B\u5427\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/initializr-13.png" alt=""></p><p>\u54A6\uFF0C\u7ADF\u7136 Whitelabel \u4E86\uFF0C\u8FD9\u4E2A 404 \u9875\u9762\u662F Spring Boot \u9ED8\u8BA4\u7684\u9519\u8BEF\u9875\u9762\uFF0C\u8868\u793A\u6211\u4EEC\u7684\u8BF7\u6C42\u5728 Web \u670D\u52A1\u4E2D\u4E0D\u5B58\u5728\u3002</p><p>\u90A3\u8BE5\u600E\u4E48\u529E\u5462\uFF1F</p><p>\u6211\u4EEC\u6765\u589E\u52A0\u4E00\u4E2A Controller \u6587\u4EF6\uFF0C\u7528\u6765\u5904\u7406 Web \u8BF7\u6C42\uFF0C\u5185\u5BB9\u5982\u4E0B\u3002</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>@Controller
-public class HelloController {
-    
-    @GetMapping(&quot;/hello&quot;)
-    @ResponseBody
-    public String hello() {
-        return &quot;hello, springboot&quot;;
-    }
-}
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>\u8FD9\u6BB5\u4EE3\u7801\u7684\u4E1A\u52A1\u903B\u8F91\u975E\u5E38\u7B80\u5355\uFF0C\u7528\u6237\u53D1\u9001 hello \u8BF7\u6C42\uFF0C\u670D\u52A1\u5668\u7AEF\u54CD\u5E94\u4E00\u4E2A\u201Chello, springboot\u201D\u56DE\u53BB\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/initializr-14.png" alt=""></p><p>OK\uFF0C\u73B0\u5728\u53EF\u4EE5\u8BBF\u95EE\u5230\u4E86\u3002\u4E5F\u5C31\u8868\u660E\u6211\u4EEC\u7684\u7B2C\u4E00\u4E2A Spring Boot \u9879\u76EE\u5F00\u53D1\u5B8C\u6210\u4E86\u3002</p><h3 id="\u70ED\u90E8\u7F72" tabindex="-1"><a class="header-anchor" href="#\u70ED\u90E8\u7F72" aria-hidden="true">#</a> \u70ED\u90E8\u7F72</h3><p>\u4F5C\u4E3A\u5F00\u53D1\u8005\uFF0C\u6211\u4EEC\u5E0C\u671B\u6BCF\u6B21\u4FEE\u6539\u4EE3\u7801\u540E\uFF0C\u4EE3\u7801\u80FD\u591F\u81EA\u52A8\u7F16\u8BD1\uFF0C\u670D\u52A1\u80FD\u591F\u81EA\u52A8\u91CD\u65B0\u52A0\u8F7D\uFF0C\u8FD9\u6837\u5C31\u7701\u53BB\u4E86\u91CD\u65B0\u8FD0\u884C\u4EE3\u7801\u7684\u70E6\u607C\u3002</p><p>\u90A3 spring-boot-devtools \u5C31\u662F\u8FD9\u6837\u7684\u4E00\u4E2A\u795E\u5668\uFF0C\u5F53\u6211\u4EEC\u628A\u5B83\u6DFB\u52A0\u5230\u9879\u76EE\u5F53\u4E2D\u540E\uFF0C\u65E0\u8BBA\u662F\u4EE3\u7801\u4FEE\u6539\uFF0C\u8FD8\u662F\u914D\u7F6E\u6587\u4EF6\u4FEE\u6539\uFF0C\u670D\u52A1\u90FD\u80FD\u591F\u79D2\u7EA7\u91CD\u8F7D\uFF08\u4FD7\u79F0\u70ED\u90E8\u7F72\uFF09\uFF0C\u8FD9\u5728\u6211\u4EEC\u5F00\u53D1\u7684\u65F6\u5019\uFF0C\u975E\u5E38\u6709\u7528\u3002</p><p>\u600E\u4E48\u624D\u80FD\u5F00\u542F\u70ED\u90E8\u7F72\u5462\uFF1F</p><p>\u7B2C\u4E00\u6B65\uFF0C\u5728 pom.xml \u6587\u4EF6\u4E2D\u6DFB\u52A0\u4F9D\u8D56\u3002</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
-    &lt;groupId&gt;org.springframework.boot&lt;/groupId&gt;
-    &lt;artifactId&gt;spring-boot-devtools&lt;/artifactId&gt;
-&lt;/dependency&gt;
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>\u7B2C\u4E8C\u6B65\uFF0C\u6CA1\u6709\u7B2C\u4E8C\u6B65\u4E86\uFF0C\u54C8\u54C8\u3002</p><p>\u76F4\u63A5\u4FEE\u6539\u4EE3\u7801\u6765\u4F53\u9A8C\u4E00\u4E0B\u5427\u3002\u6211\u4EEC\u4FEE\u6539 HelloController \u5185\u5BB9\u4E3A\uFF1A</p><hr>`,21),L=t("\u66F4\u591A\u5185\u5BB9\uFF0C\u53EA\u9488\u5BF9\u300AJava \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF\u300B\u661F\u7403\u7528\u6237\u5F00\u653E\uFF0C\u9700\u8981\u7684\u5C0F\u4F19\u4F34\u53EF\u4EE5"),V=t("\u6233\u94FE\u63A5\u{1F517}"),y=t("\u52A0\u5165\u6211\u4EEC\u7684\u661F\u7403\uFF0C\u4E00\u8D77\u5B66\u4E60\uFF0C\u4E00\u8D77\u5377\u3002\u3002"),P=e("strong",null,"\u7F16\u7A0B\u55B5",-1),E=t("\u{1F431}\u662F\u4E00\u4E2A Spring Boot+Vue \u7684\u524D\u540E\u7AEF\u5206\u79BB\u9879\u76EE\uFF0C\u878D\u5408\u4E86\u5E02\u9762\u4E0A\u7EDD\u5927\u591A\u6570\u6D41\u884C\u7684\u6280\u672F\u8981\u70B9\u3002\u901A\u8FC7\u5B66\u4E60\u5B9E\u6218\u9879\u76EE\uFF0C\u4F60\u53EF\u4EE5\u5C06\u6240\u5B66\u7684\u77E5\u8BC6\u901A\u8FC7\u5B9E\u8DF5\u8FDB\u884C\u68C0\u9A8C\u3001\u4F60\u53EF\u4EE5\u62D3\u5BBD\u81EA\u5DF1\u7684\u6280\u672F\u8FB9\u754C\uFF0C\u4F60\u53EF\u4EE5\u638C\u63E1\u4E00\u4E2A\u771F\u6B63\u7684\u5B9E\u6218\u9879\u76EE\u662F\u5982\u4F55\u4ECE 0 \u5230 1 \u7684\u3002"),G=e("hr",null,null,-1),N=e("h3",{id:"\u6E90\u7801\u8DEF\u5F84",tabindex:"-1"},[e("a",{class:"header-anchor",href:"#\u6E90\u7801\u8DEF\u5F84","aria-hidden":"true"},"#"),t(" \u6E90\u7801\u8DEF\u5F84")],-1),H=t("\u7F16\u7A0B\u55B5\uFF1A"),R={href:"https://github.com/itwanger/coding-more",target:"_blank",rel:"noopener noreferrer"},U=t("https://github.com/itwanger/coding-more"),O=t("helloworld\uFF1A"),X={href:"https://github.com/itwanger/codingmore-learning/tree/main/codingmore-helloword",target:"_blank",rel:"noopener noreferrer"},F=t("https://github.com/itwanger/codingmore-learning"),Q=e("hr",null,null,-1),Y=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png",alt:""})],-1);function Z($,ee){const n=r("ExternalLinkIcon"),a=r("RouterLink");return s(),p("div",null,[g,b,e("blockquote",null,[e("p",null,[e("a",m,[h,i(n)])])]),u,v,_,j,e("p",null,[f,e("a",S,[x,i(n)]),z]),B,e("p",null,[I,e("a",k,[J,i(n)]),w]),D,q,M,W,T,e("blockquote",null,[e("p",null,[e("a",C,[K,i(n)])])]),A,e("p",null,[L,i(a,{to:"/springboot/docs/zhishixingqiu/"},{default:c(()=>[V]),_:1}),y,P,E]),G,N,e("blockquote",null,[e("ul",null,[e("li",null,[H,e("a",R,[U,i(n)])]),e("li",null,[O,e("a",X,[F,i(n)])])])]),Q,Y])}var ne=l(d,[["render",Z],["__file","initializr.html.vue"]]);export{ne as default};
diff --git a/dist/assets/inner-class.html.5b071786.js b/dist/assets/inner-class.html.858a9fd0.js
similarity index 99%
rename from dist/assets/inner-class.html.5b071786.js
rename to dist/assets/inner-class.html.858a9fd0.js
index a93935db..52020f2e 100644
--- a/dist/assets/inner-class.html.5b071786.js
+++ b/dist/assets/inner-class.html.858a9fd0.js
@@ -1,4 +1,4 @@
-import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e as p}from"./app.a0271b9c.js";const e={},t=p(`<h1 id="java-\u5185\u90E8\u7C7B" tabindex="-1"><a class="header-anchor" href="#java-\u5185\u90E8\u7C7B" aria-hidden="true">#</a> Java \u5185\u90E8\u7C7B</h1><h3 id="\u5185\u90E8\u7C7B\u7B80\u4ECB" tabindex="-1"><a class="header-anchor" href="#\u5185\u90E8\u7C7B\u7B80\u4ECB" aria-hidden="true">#</a> \u5185\u90E8\u7C7B\u7B80\u4ECB</h3><p>\u5728 Java \u4E2D\uFF0C\u53EF\u4EE5\u5C06\u4E00\u4E2A\u7C7B\u5B9A\u4E49\u5728\u53E6\u5916\u4E00\u4E2A\u7C7B\u91CC\u9762\u6216\u8005\u4E00\u4E2A\u65B9\u6CD5\u91CC\u9762\uFF0C\u8FD9\u6837\u7684\u7C7B\u53EB\u505A\u5185\u90E8\u7C7B\u3002</p><p>\u4E00\u822C\u6765\u8BF4\uFF0C\u5185\u90E8\u7C7B\u5206\u4E3A\u6210\u5458\u5185\u90E8\u7C7B\u3001\u5C40\u90E8\u5185\u90E8\u7C7B\u3001\u533F\u540D\u5185\u90E8\u7C7B\u548C\u9759\u6001\u5185\u90E8\u7C7B\u3002</p><p><strong>1\uFF09\u6210\u5458\u5185\u90E8\u7C7B</strong></p><p>\u6210\u5458\u5185\u90E8\u7C7B\u662F\u6700\u5E38\u89C1\u7684\u5185\u90E8\u7C7B\uFF0C\u770B\u4E0B\u9762\u7684\u4EE3\u7801\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">class</span> <span class="token class-name">Wanger</span> <span class="token punctuation">{</span>
+import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e as p}from"./app.615e41d8.js";const e={},t=p(`<h1 id="java-\u5185\u90E8\u7C7B" tabindex="-1"><a class="header-anchor" href="#java-\u5185\u90E8\u7C7B" aria-hidden="true">#</a> Java \u5185\u90E8\u7C7B</h1><h3 id="\u5185\u90E8\u7C7B\u7B80\u4ECB" tabindex="-1"><a class="header-anchor" href="#\u5185\u90E8\u7C7B\u7B80\u4ECB" aria-hidden="true">#</a> \u5185\u90E8\u7C7B\u7B80\u4ECB</h3><p>\u5728 Java \u4E2D\uFF0C\u53EF\u4EE5\u5C06\u4E00\u4E2A\u7C7B\u5B9A\u4E49\u5728\u53E6\u5916\u4E00\u4E2A\u7C7B\u91CC\u9762\u6216\u8005\u4E00\u4E2A\u65B9\u6CD5\u91CC\u9762\uFF0C\u8FD9\u6837\u7684\u7C7B\u53EB\u505A\u5185\u90E8\u7C7B\u3002</p><p>\u4E00\u822C\u6765\u8BF4\uFF0C\u5185\u90E8\u7C7B\u5206\u4E3A\u6210\u5458\u5185\u90E8\u7C7B\u3001\u5C40\u90E8\u5185\u90E8\u7C7B\u3001\u533F\u540D\u5185\u90E8\u7C7B\u548C\u9759\u6001\u5185\u90E8\u7C7B\u3002</p><p><strong>1\uFF09\u6210\u5458\u5185\u90E8\u7C7B</strong></p><p>\u6210\u5458\u5185\u90E8\u7C7B\u662F\u6700\u5E38\u89C1\u7684\u5185\u90E8\u7C7B\uFF0C\u770B\u4E0B\u9762\u7684\u4EE3\u7801\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">class</span> <span class="token class-name">Wanger</span> <span class="token punctuation">{</span>
     <span class="token keyword">int</span> age <span class="token operator">=</span> <span class="token number">18</span><span class="token punctuation">;</span>
     
     <span class="token keyword">class</span> <span class="token class-name">Wangxiaoer</span> <span class="token punctuation">{</span>
diff --git a/dist/assets/install-baota-mianban.html.4c7a95c4.js b/dist/assets/install-baota-mianban.html.fc940506.js
similarity index 98%
rename from dist/assets/install-baota-mianban.html.4c7a95c4.js
rename to dist/assets/install-baota-mianban.html.fc940506.js
index 56f76a2b..26e61510 100644
--- a/dist/assets/install-baota-mianban.html.4c7a95c4.js
+++ b/dist/assets/install-baota-mianban.html.fc940506.js
@@ -1,2 +1,2 @@
-import{_ as r}from"./plugin-vue_export-helper.21dcd24c.js";import{r as b,o as p,c as i,a as e,b as o,e as t,d as n}from"./app.a0271b9c.js";const c={},l=t(`<p>\u4ECA\u5929\u6765\u7ED9\u5927\u5BB6\u63A8\u8350\u4E00\u6B3E\u73A9\u8F6C\u4E91\u670D\u52A1\u5668\u7684\u795E\u5668\u2014\u2014<strong>\u5B9D\u5854\u9762\u677F</strong>\uFF0C\u6709\u4E86\u8FD9\u73A9\u610F\uFF0C\u670D\u52A1\u5668\u80FD\u73A9\u4E00\u6574\u5E74\uFF0C\u751A\u81F3\u4F59\u751F\uFF01</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-ad40a5f7-30a8-4c6c-9671-c389432e16de.png" alt="https://www.bt.cn/"></p><p>--------\u5F00\u59CB\u4FDD\u59C6\u7EA7\u6F14\u793A\u5982\u4F55\u5B89\u88C5\u5B9D\u5854\u9762\u677F-------</p><p>\u4E3A\u4E86\u7ED9\u5927\u5BB6\u5448\u73B0\u51FA\u4FDD\u59C6\u7EA7\u7684\u6559\u7A0B\uFF0C\u6211\u81EA\u5DF1\u65B0\u4E0B\u5355\u4E86\u4E00\u6B3E\u8F7B\u91CF\u5E94\u7528\u670D\u52A1\u5668\u3002\u767B\u5F55\u963F\u91CC\u4E91\u670D\u52A1\u5668\u540E\u53F0\uFF0C\u53EF\u4EE5\u770B\u5230\u8FD9\u53F0\u670D\u52A1\u5668\u6B63\u5728\u8FD0\u884C\u5F53\u4E2D\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-11df60df-a51c-48d4-a704-343d01d44777.png" alt=""></p><p>\u70B9\u51FB\u300C\u8FDC\u7A0B\u94FE\u63A5\u300D\u7684\u5C0F\u56FE\u6807\uFF0C\u7B2C\u4E00\u6B21\u9700\u8981\u624B\u673A\u9A8C\u8BC1\u7801\uFF0C\u4E4B\u540E\u8FDB\u5165\u5230\u5728\u7EBF\u7248\u7684\u7EC8\u7AEF\u7A97\u53E3\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-1fc16ac7-10b1-4e61-98f5-d48bb09ab626.png" alt=""></p><p>\u53EF\u4EE5\u6309\u7167\u63D0\u793A\u8F93\u5165 <code>sudo su root</code> \u547D\u4EE4\u5207\u6362\u5230 root \u8D26\u6237\u3002</p><p>\u5207\u6362\u5230\u5B9D\u5854Linux \u9762\u677F\u9875\uFF0C\u53EF\u4EE5\u770B\u5230\u5BF9\u5E94\u7684\u5B89\u88C5\u547D\u4EE4\uFF0C\u5982\u4E0B\u56FE\u6240\u793A\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-ce7e94b5-c90b-422e-a7e3-942c615c2837.png" alt=""></p><p>\u6211\u7684\u4E91\u670D\u52A1\u5668\u955C\u50CF\u9009\u62E9\u7684\u662F CentOS\uFF0C\u6240\u4EE5\u53EF\u4EE5\u76F4\u63A5\u590D\u5236 yum \u547D\u4EE4</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>yum install -y wget &amp;&amp; wget -O install.sh http://download.bt.cn/install/install_6.0.sh &amp;&amp; sh install.sh
+import{_ as r}from"./plugin-vue_export-helper.21dcd24c.js";import{r as b,o as p,c as i,a as e,b as o,e as t,d as n}from"./app.615e41d8.js";const c={},l=t(`<p>\u4ECA\u5929\u6765\u7ED9\u5927\u5BB6\u63A8\u8350\u4E00\u6B3E\u73A9\u8F6C\u4E91\u670D\u52A1\u5668\u7684\u795E\u5668\u2014\u2014<strong>\u5B9D\u5854\u9762\u677F</strong>\uFF0C\u6709\u4E86\u8FD9\u73A9\u610F\uFF0C\u670D\u52A1\u5668\u80FD\u73A9\u4E00\u6574\u5E74\uFF0C\u751A\u81F3\u4F59\u751F\uFF01</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-ad40a5f7-30a8-4c6c-9671-c389432e16de.png" alt="https://www.bt.cn/"></p><p>--------\u5F00\u59CB\u4FDD\u59C6\u7EA7\u6F14\u793A\u5982\u4F55\u5B89\u88C5\u5B9D\u5854\u9762\u677F-------</p><p>\u4E3A\u4E86\u7ED9\u5927\u5BB6\u5448\u73B0\u51FA\u4FDD\u59C6\u7EA7\u7684\u6559\u7A0B\uFF0C\u6211\u81EA\u5DF1\u65B0\u4E0B\u5355\u4E86\u4E00\u6B3E\u8F7B\u91CF\u5E94\u7528\u670D\u52A1\u5668\u3002\u767B\u5F55\u963F\u91CC\u4E91\u670D\u52A1\u5668\u540E\u53F0\uFF0C\u53EF\u4EE5\u770B\u5230\u8FD9\u53F0\u670D\u52A1\u5668\u6B63\u5728\u8FD0\u884C\u5F53\u4E2D\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-11df60df-a51c-48d4-a704-343d01d44777.png" alt=""></p><p>\u70B9\u51FB\u300C\u8FDC\u7A0B\u94FE\u63A5\u300D\u7684\u5C0F\u56FE\u6807\uFF0C\u7B2C\u4E00\u6B21\u9700\u8981\u624B\u673A\u9A8C\u8BC1\u7801\uFF0C\u4E4B\u540E\u8FDB\u5165\u5230\u5728\u7EBF\u7248\u7684\u7EC8\u7AEF\u7A97\u53E3\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-1fc16ac7-10b1-4e61-98f5-d48bb09ab626.png" alt=""></p><p>\u53EF\u4EE5\u6309\u7167\u63D0\u793A\u8F93\u5165 <code>sudo su root</code> \u547D\u4EE4\u5207\u6362\u5230 root \u8D26\u6237\u3002</p><p>\u5207\u6362\u5230\u5B9D\u5854Linux \u9762\u677F\u9875\uFF0C\u53EF\u4EE5\u770B\u5230\u5BF9\u5E94\u7684\u5B89\u88C5\u547D\u4EE4\uFF0C\u5982\u4E0B\u56FE\u6240\u793A\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-ce7e94b5-c90b-422e-a7e3-942c615c2837.png" alt=""></p><p>\u6211\u7684\u4E91\u670D\u52A1\u5668\u955C\u50CF\u9009\u62E9\u7684\u662F CentOS\uFF0C\u6240\u4EE5\u53EF\u4EE5\u76F4\u63A5\u590D\u5236 yum \u547D\u4EE4</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>yum install -y wget &amp;&amp; wget -O install.sh http://download.bt.cn/install/install_6.0.sh &amp;&amp; sh install.sh
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>\u5230\u4E91\u670D\u52A1\u5668\u7684\u300C\u7EC8\u7AEF\u300D\u4E0B\u8FDB\u884C\u5728\u7EBF\u5B89\u88C5\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-b7dcf834-294a-4bd0-86f0-7b0b92c5b3fe.png" alt=""></p><p>yum \u547D\u4EE4\u662F CentOS \u7684\u4F18\u52BF\uFF0C\u53EF\u4EE5\u5728\u7EBF\u5B89\u88C5\u548C\u5347\u7EA7\u8F6F\u4EF6\u3002\u5F53\u51FA\u73B0\u4E0A\u56FE\u63D0\u793A\u7684\u5185\u5BB9\uFF08\u5916\u7F51\u9762\u677F\u5730\u5740\u3001\u7528\u6237\u540D\u548C\u5BC6\u7801\uFF09\u540E\u5C31\u8868\u793A\u5B9D\u5854\u9762\u677F\u5B89\u88C5\u6210\u529F\u4E86\uFF01</p><p>\u524D\u540E\u5927\u6982 2 \u5206\u949F\u5DE6\u53F3\u7684\u65F6\u95F4\uFF0C\u8FD8\u662F\u6BD4\u8F83\u5FEB\u7684\u3002\u8BB0\u4F4F\u5916\u7F51\u9762\u677F\u5730\u5740\u3001\u7528\u6237\u540D\u548C\u5BC6\u7801\uFF0C\u5C31\u53EF\u4EE5\u901A\u8FC7\u5B9D\u5854\u9762\u677F\u8BBF\u95EE\u4E91\u670D\u52A1\u5668\u4E86\u3002</p><p>\u5982\u679C\u65E0\u6CD5\u8BBF\u95EE\uFF0C\u8868\u793A\u670D\u52A1\u5668\u6CA1\u6709\u5F00\u653E 8888 \u7AEF\u53E3\u3002\u9009\u62E9\u6211\u7684\u8F7B\u91CF\u670D\u52A1\u5668\uFF0C\u9009\u62E9\u9632\u706B\u5899\uFF0C\u9009\u62E9\u300C\u6DFB\u52A0\u89C4\u5219\u300D\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-65f67086-cc35-4b7f-89b4-d73e51a859e0.png" alt=""></p><p>\u80FD\u770B\u5230\u76EE\u524D\u670D\u52A1\u5668\u53EA\u5F00\u653E\u4E86 HTTP\u3001HTTPS \u548C SSH \u7684\u7AEF\u53E3\uFF0C8888 \u7AEF\u53E3\u8FD8\u6CA1\u6709\u653E\u884C\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-5f7fa1a0-1810-40a0-b371-ae2ee5948f80.png" alt=""></p><p>\u518D\u6B21\u8BBF\u95EE\u5916\u7F51\u9762\u677F\u5730\u5740\uFF0C\u5C31\u53EF\u4EE5\u770B\u5230\u767B\u5F55\u9875\u9762\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-1233ea14-2e6b-48d9-b278-ab87b3cc3cbd.png" alt=""></p><p>\u767B\u5F55\u6210\u529F\u540E\uFF08\u8BA9\u6D4F\u89C8\u5668\u5E2E\u4F60\u8BB0\u4F4F\u8D26\u53F7\u548C\u5BC6\u7801\uFF09\uFF0C\u5982\u679C\u4E4B\u524D\u6709\u5B9D\u5854\u5B98\u65B9\u8D26\u53F7\uFF0C\u53EF\u4EE5\u9009\u62E9\u7ED1\u5B9A\uFF0C\u5982\u679C\u6CA1\u6709\u7684\u8BDD\uFF0C\u6CE8\u518C\u4E00\u4E2A\u3002\u4E4B\u540E\u5C31\u53EF\u4EE5\u770B\u5230\u5B9D\u5854\u9762\u677F\u63A8\u8350\u6211\u4EEC\u5B89\u88C5\u7684\u670D\u52A1\u5668\u8F6F\u4EF6\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-e618418b-1862-4db2-9d61-61358330b77d.png" alt=""></p><p>\u901A\u5E38\u6765\u8BF4\uFF0C\u76F4\u63A5\u5B89\u88C5 LNMP \u7EC4\u5408\u5305\u5C31\u53EF\u4EE5\u4E86\uFF0C\u5305\u62EC\u53EF\u4EE5\u4E00\u952E\u5B89\u88C5\u5230 Linux \u73AF\u5883\u7684 Nginx\u3001MySQL\u3001PHP \u7B49\u6210\u5458\u3002</p><p>LNMP \u4E00\u952E\u5B89\u88C5\u5305\u80FD\u4E3A\u4E0D\u4F1A Linux \u7684\u65B0\u624B\u63D0\u4F9B\u4E00\u4E2A\u53EF\u4EE5\u4F7F\u7528 Linux \u751F\u4EA7\u7684\u57FA\u7840\u73AF\u5883\uFF0C\u65E0\u9700\u4E00\u4E2A\u4E00\u4E2A\u7684\u8F93\u5165\u547D\u4EE4\uFF0C\u65E0\u9700\u503C\u5B88\uFF0C\u65E0\u9700\u4E3A\u8F6F\u4EF6\u4E4B\u95F4\u7684\u4F9D\u8D56\u800C\u70E6\u607C\u3002</p>`,26),s={href:"https://lnmp.org",target:"_blank",rel:"noopener noreferrer"},m=n("https://lnmp.org"),d=t('<p>LAMP \u548C LNMP \u7684\u5DEE\u522B\u5C31\u5728\u4E8E\u524D\u8005\u63D0\u4F9B\u7684\u662F Apache \u7684 Web \u670D\u52A1\u5668\uFF0C\u540E\u6765\u662F Nginx\u3002Nginx \u7531 Igor Sysoev \u4E3A\u4FC4\u7F57\u65AF\u8BBF\u95EE\u91CF\u7B2C\u4E8C\u7684 Rambler.ru \u7AD9\u70B9\u5F00\u53D1\u7684 Web\u670D\u52A1\u5668\u8F6F\u4EF6\uFF0C\u56FD\u5185\u5916\u7684\u95E8\u6237\u7F51\u7AD9\u3001\u884C\u4E1A\u7F51\u7AD9\u4E5F\u90FD\u5728\u4F7F\u7528Nginx\uFF0C\u76F8\u5F53\u7684\u7A33\u5B9A\u3002</p><p>MySQL \u57FA\u672C\u4E0A\u662F\u4E2D\u5C0F\u578B\u670D\u52A1\u5668\u5FC5\u5907\u7684\u5173\u7CFB\u578B\u6570\u636E\u5E93\u8F6F\u4EF6\uFF1BPHP \u867D\u7136\u6CA1\u843D\u4E86\uFF0C\u4F46\u4ECD\u7136\u662F\u5F88\u591A\u670D\u52A1\u5668\u8F6F\u4EF6\u7684\u524D\u7F6E\u73AF\u5883\uFF0C\u6BD4\u5982\u8BF4\u6700\u53D7\u6B22\u8FCE\u7684\u670D\u52A1\u5668\u5EFA\u7AD9\u5DE5\u5177 WordPress\u3002</p><p>\u70B9\u51FB\u300C\u4E00\u952E\u5B89\u88C5\u300D\uFF0C\u5B9D\u5854\u9762\u677F\u5C31\u4F1A\u5E2E\u6211\u4EEC\u81EA\u52A8\u5B89\u6392\u4E0A\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-036631d0-5160-4b9e-a750-0f15966e1ee3.png" alt=""></p><p>\u5230\u6B64\u4E3A\u6B62\uFF0C\u5B9D\u5854\u9762\u677F\u7684\u57FA\u7840\u73AF\u5883\u5C31\u51C6\u5907\u5B8C\u6210\u4E86\u3002\u53EF\u4EE5\u5728\u4E0A\u9762\u6309\u7167\u5DE6\u4FA7\u7684\u83DC\u5355\u9879\u76EE\u5BF9\u670D\u52A1\u5668\u8FDB\u884C\u64CD\u4F5C\u4E86\uFF0C\u6BD4\u5982\u8BF4\uFF1A</p><ul><li>\u7F51\u7AD9</li><li>FTP</li><li>\u6570\u636E\u5E93</li><li>\u76D1\u63A7</li><li>\u5B89\u5168</li><li>\u9632\u706B\u5899</li><li>\u6587\u4EF6</li><li>\u7EC8\u7AEF</li><li>\u8BA1\u5212\u4EFB\u52A1</li><li>\u8F6F\u4EF6\u5546\u5E97</li><li>\u7B49\u7B49</li></ul><p>\u8FD9\u91CC\u5148\u8BF4\u4E00\u4E0B\u7EC8\u7AEF\uFF0C\u7B2C\u4E00\u6B21\u8FDB\u6765\u7684\u65F6\u5019\u9700\u8981\u8FDB\u884C SSH \u8D26\u53F7\u9A8C\u8BC1\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-08cec2c4-0c4d-4b06-aefb-be29ef1052e6.png" alt=""></p><p>\u5BC6\u7801\u4ECE\u54EA\u91CC\u6765\u7684\u5462\uFF1F</p><p>\u5728\u300C\u670D\u52A1\u5668\u8FD0\u7EF4\u300D\u4E2D\u9009\u62E9\u300C\u8FDC\u7A0B\u94FE\u63A5\u300D\u9875\u9762\u4E0B\u3002\u6709 3 \u79CD\u65B9\u5F0F\uFF0C\u7B2C\u4E00\u79CD\u53EF\u4EE5\u76F4\u63A5\u4F7F\u7528\u6D4F\u89C8\u5668\uFF0C\u7B2C\u4E8C\u79CD\u4F7F\u7528\u5BC6\u94A5\uFF0C\u7B2C\u4E09\u79CD\u4F7F\u7528\u8D26\u6237\u548C\u5BC6\u7801\u3002</p><p>\u4E3A\u4E86\u65B9\u4FBF\u6F14\u793A\uFF0C\u8FD9\u91CC\u9009\u62E9\u9009\u62E9\u300C\u8BBE\u7F6E\u5BC6\u7801\u300D\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-0560b7fc-4c22-4dd3-be91-d35b631b93e2.png" alt=""></p><p>\u8BBE\u7F6E\u5B8C\u6210\u540E\uFF0C\u91CD\u542F\u670D\u52A1\u5668\u751F\u6548\u3002\u4E4B\u540E\u5728\u5B9D\u5854\u9762\u677F\u7684\u300C\u7EC8\u7AEF\u300D\u9762\u677F\u4E0B\u586B\u5199\u5BC6\u7801\u5C31\u53EF\u4EE5\u94FE\u63A5\u4E86\u3002\u4E0D\u8FC7\u5728\u6D4F\u89C8\u5668\u7684\u7EC8\u7AEF\u91CC\u6572\u547D\u4EE4\u603B\u611F\u89C9\u6709\u70B9\u4E0D\u592A\u65B9\u4FBF\uFF0C\u6211\u4EEC\u6700\u597D\u9009\u62E9 iterm2\u3001putty\u3001xshell \u8FD9\u6837\u7684\u5BA2\u6237\u7AEF\u3002</p><p>\u518D\u8BF4\u4E00\u4E0B\u8F6F\u4EF6\u5546\u5E97\uFF0C\u6709\u4ED8\u8D39\u7684\u6709\u514D\u8D39\u7684\uFF0C\u4E0D\u8FC7\u5BF9\u4E8E\u6211\u4EEC\u4E2A\u4EBA\u670D\u52A1\u5668\u6765\u8BF4\uFF0C\u514D\u8D39\u7248\u7684\u90FD\u8DB3\u591F\u7528\u4E86\u3002\u9700\u8981\u4EC0\u4E48\u5B89\u88C5\u4EC0\u4E48\u5C31\u597D\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-6f4f2ed4-74cf-4cc2-af6c-1750f14d3846.png" alt=""></p><p>\u4E0A\u4F20\u4E0B\u8F7D\u6587\u4EF6\u4E5F\u975E\u5E38\u65B9\u4FBF\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-aefbcc8e-28c3-48ff-bf66-efdcb8fd57ae.png" alt=""></p><p>---\u518D\u518D\u5272\u4E00\u4E0B------</p><p>\u8BB2\u771F\uFF0C\u6709\u4E86\u5B9D\u5854\u9762\u677F\u540E\uFF0C\u64CD\u4F5C\u670D\u52A1\u5668\u662F\u771F\u7279\u4E48\u7684\u65B9\u4FBF\u554A\uFF01\u88C5\u4E86\u4EE5\u540E\u53EF\u4EE5\uFF1A</p><ul><li>\u521B\u5EFA\u7BA1\u7406\u7F51\u7AD9</li><li>\u5E26\u989C\u8272\u7684\u7EC8\u7AEF\u547D\u4EE4\u884C</li><li>\u6570\u636E\u5E93\u53EF\u89C6\u5316\u7BA1\u7406</li><li>\u6587\u4EF6\u53EF\u89C6\u5316\u7BA1\u7406</li><li>\u670D\u52A1\u5668\u8F6F\u4EF6\u53EF\u89C6\u5316\u7BA1\u7406</li><li>\u4E00\u952E\u5B89\u88C5 Nginx \u53CD\u5411\u4EE3\u7406\u8F6F\u4EF6</li><li>\u7533\u8BF7\u90E8\u7F72\u7F51\u7AD9 SSL \u8BC1\u4E66</li><li>\u4EE3\u7406\u4E91\u670D\u52A1\u5668\u7AEF\u53E3</li><li>\u66F4\u591A\u5F3A\u5927\u529F\u80FD\uFF0C\u7B49\u5F85\u5927\u5BB6\u53BB\u89E3\u9501</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p>',21);function g(j,v){const a=b("ExternalLinkIcon");return p(),i("div",null,[l,e("blockquote",null,[e("p",null,[e("a",s,[m,o(a)])])]),d])}var u=r(c,[["render",g],["__file","install-baota-mianban.html.vue"]]);export{u as default};
diff --git a/dist/assets/instanceof-jvm.html.c9e8e080.js b/dist/assets/instanceof-jvm.html.84099ac1.js
similarity index 99%
rename from dist/assets/instanceof-jvm.html.c9e8e080.js
rename to dist/assets/instanceof-jvm.html.84099ac1.js
index b37588c3..9babe338 100644
--- a/dist/assets/instanceof-jvm.html.c9e8e080.js
+++ b/dist/assets/instanceof-jvm.html.84099ac1.js
@@ -1,4 +1,4 @@
-import{_ as t}from"./plugin-vue_export-helper.21dcd24c.js";import{r as o,o as p,c,a as n,b as l,e as s,d as a}from"./app.a0271b9c.js";const i={},r=s(`<h1 id="instanceof\u5173\u952E\u5B57\u662F\u5982\u4F55\u5B9E\u73B0\u7684" tabindex="-1"><a class="header-anchor" href="#instanceof\u5173\u952E\u5B57\u662F\u5982\u4F55\u5B9E\u73B0\u7684" aria-hidden="true">#</a> instanceof\u5173\u952E\u5B57\u662F\u5982\u4F55\u5B9E\u73B0\u7684\uFF1F</h1><p>\u5C0F\u4E8C\u90A3\u5929\u53BB\u9762\u8BD5\uFF0C\u78B0\u5230\u4E86\u8FD9\u4E2A\u95EE\u9898\uFF1A\u201C<strong>instanceof \u5173\u952E\u5B57\u662F\u5982\u4F55\u5B9E\u73B0\u7684</strong>\uFF1F\u201D\u9762\u8BD5\u5B98\u5E0C\u671B\u4ED6\u80FD\u4ECE\u5E95\u5C42\u6765\u5206\u6790\u4E00\u4E0B\uFF0C\u7ED3\u679C\u5C0F\u4E8C\u6CA1\u7B54\u4E0A\u6765\uFF0C\u5C31\u6765\u95EE\u6211\u3002</p><p>\u6211\u552F\u552F\u8BFA\u8BFA\uFF0C\u5F3A\u88C5\u9547\u5B9A\uFF0C\u53EA\u597D\u628A R \u5927\u7684\u4E00\u7BC7\u56DE\u7B54\u7529\u7ED9\u4E86\u4ED6\uFF0C\u5E76\u4E14\u53EE\u5631\u4ED6\uFF1A\u201C\u8BA4\u8BA4\u771F\u771F\u770B\uFF0C\u73A9\u5B8C\u540E\u8981\u662F\u8FD8\u4E0D\u660E\u767D\uFF0C\u518D\u6765\u95EE\u6211\u3002\u3002\u3002\u201D</p><blockquote><p>\u4F5C\u8005\uFF1ARednaxelaFX\uFF0C\u6574\u7406\uFF1A\u6C89\u9ED8\u738B\u4E8C\uFF0C\u94FE\u63A5\uFF1Ahttps://www.zhihu.com/question/21574535/answer/18998914</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/basic-extra-meal/instanceof-jvm-b676fee6-bfd4-4ae9-9c7b-e488e345f775.gif" alt=""></p><hr><h3 id="\u573A\u666F\u4E00-\u6708\u85AA-3000-\u5143\u4E00\u4E0B\u7684\u7801\u519C\u804C\u4F4D" tabindex="-1"><a class="header-anchor" href="#\u573A\u666F\u4E00-\u6708\u85AA-3000-\u5143\u4E00\u4E0B\u7684\u7801\u519C\u804C\u4F4D" aria-hidden="true">#</a> \u573A\u666F\u4E00\uFF1A\u6708\u85AA 3000 \u5143\u4E00\u4E0B\u7684\u7801\u519C\u804C\u4F4D</h3><p>\u7528 Java \u4F2A\u4EE3\u7801\u6765\u8868\u73B0instanceof\u5173\u952E\u5B57\u5728Java\u8BED\u8A00\u89C4\u8303\u6240\u63CF\u8FF0\u7684\u8FD0\u884C\u65F6\u8BED\u4E49\uFF0C\u662F\u8FD9\u6837\u7684\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token comment">// obj instanceof T</span>
+import{_ as t}from"./plugin-vue_export-helper.21dcd24c.js";import{r as o,o as p,c,a as n,b as l,e as s,d as a}from"./app.615e41d8.js";const i={},r=s(`<h1 id="instanceof\u5173\u952E\u5B57\u662F\u5982\u4F55\u5B9E\u73B0\u7684" tabindex="-1"><a class="header-anchor" href="#instanceof\u5173\u952E\u5B57\u662F\u5982\u4F55\u5B9E\u73B0\u7684" aria-hidden="true">#</a> instanceof\u5173\u952E\u5B57\u662F\u5982\u4F55\u5B9E\u73B0\u7684\uFF1F</h1><p>\u5C0F\u4E8C\u90A3\u5929\u53BB\u9762\u8BD5\uFF0C\u78B0\u5230\u4E86\u8FD9\u4E2A\u95EE\u9898\uFF1A\u201C<strong>instanceof \u5173\u952E\u5B57\u662F\u5982\u4F55\u5B9E\u73B0\u7684</strong>\uFF1F\u201D\u9762\u8BD5\u5B98\u5E0C\u671B\u4ED6\u80FD\u4ECE\u5E95\u5C42\u6765\u5206\u6790\u4E00\u4E0B\uFF0C\u7ED3\u679C\u5C0F\u4E8C\u6CA1\u7B54\u4E0A\u6765\uFF0C\u5C31\u6765\u95EE\u6211\u3002</p><p>\u6211\u552F\u552F\u8BFA\u8BFA\uFF0C\u5F3A\u88C5\u9547\u5B9A\uFF0C\u53EA\u597D\u628A R \u5927\u7684\u4E00\u7BC7\u56DE\u7B54\u7529\u7ED9\u4E86\u4ED6\uFF0C\u5E76\u4E14\u53EE\u5631\u4ED6\uFF1A\u201C\u8BA4\u8BA4\u771F\u771F\u770B\uFF0C\u73A9\u5B8C\u540E\u8981\u662F\u8FD8\u4E0D\u660E\u767D\uFF0C\u518D\u6765\u95EE\u6211\u3002\u3002\u3002\u201D</p><blockquote><p>\u4F5C\u8005\uFF1ARednaxelaFX\uFF0C\u6574\u7406\uFF1A\u6C89\u9ED8\u738B\u4E8C\uFF0C\u94FE\u63A5\uFF1Ahttps://www.zhihu.com/question/21574535/answer/18998914</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/basic-extra-meal/instanceof-jvm-b676fee6-bfd4-4ae9-9c7b-e488e345f775.gif" alt=""></p><hr><h3 id="\u573A\u666F\u4E00-\u6708\u85AA-3000-\u5143\u4E00\u4E0B\u7684\u7801\u519C\u804C\u4F4D" tabindex="-1"><a class="header-anchor" href="#\u573A\u666F\u4E00-\u6708\u85AA-3000-\u5143\u4E00\u4E0B\u7684\u7801\u519C\u804C\u4F4D" aria-hidden="true">#</a> \u573A\u666F\u4E00\uFF1A\u6708\u85AA 3000 \u5143\u4E00\u4E0B\u7684\u7801\u519C\u804C\u4F4D</h3><p>\u7528 Java \u4F2A\u4EE3\u7801\u6765\u8868\u73B0instanceof\u5173\u952E\u5B57\u5728Java\u8BED\u8A00\u89C4\u8303\u6240\u63CF\u8FF0\u7684\u8FD0\u884C\u65F6\u8BED\u4E49\uFF0C\u662F\u8FD9\u6837\u7684\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token comment">// obj instanceof T</span>
 <span class="token keyword">boolean</span> result<span class="token punctuation">;</span>
 <span class="token keyword">if</span> <span class="token punctuation">(</span>obj <span class="token operator">==</span> <span class="token keyword">null</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
   result <span class="token operator">=</span> <span class="token boolean">false</span><span class="token punctuation">;</span>
diff --git a/dist/assets/instanceof.html.d3f5b0d7.js b/dist/assets/instanceof.html.edc709c7.js
similarity index 99%
rename from dist/assets/instanceof.html.d3f5b0d7.js
rename to dist/assets/instanceof.html.edc709c7.js
index 509ab33b..6140926d 100644
--- a/dist/assets/instanceof.html.d3f5b0d7.js
+++ b/dist/assets/instanceof.html.edc709c7.js
@@ -1,4 +1,4 @@
-import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as a,c as s,e}from"./app.a0271b9c.js";const p={},c=e(`<h1 id="java-instanceof\u5173\u952E\u5B57\u7528\u6CD5" tabindex="-1"><a class="header-anchor" href="#java-instanceof\u5173\u952E\u5B57\u7528\u6CD5" aria-hidden="true">#</a> Java instanceof\u5173\u952E\u5B57\u7528\u6CD5</h1><p>instanceof \u5173\u952E\u5B57\u7684\u7528\u6CD5\u5176\u5B9E\u5F88\u7B80\u5355\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token punctuation">(</span>object<span class="token punctuation">)</span> <span class="token keyword">instanceof</span> <span class="token punctuation">(</span>type<span class="token punctuation">)</span>
+import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as a,c as s,e}from"./app.615e41d8.js";const p={},c=e(`<h1 id="java-instanceof\u5173\u952E\u5B57\u7528\u6CD5" tabindex="-1"><a class="header-anchor" href="#java-instanceof\u5173\u952E\u5B57\u7528\u6CD5" aria-hidden="true">#</a> Java instanceof\u5173\u952E\u5B57\u7528\u6CD5</h1><p>instanceof \u5173\u952E\u5B57\u7684\u7528\u6CD5\u5176\u5B9E\u5F88\u7B80\u5355\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token punctuation">(</span>object<span class="token punctuation">)</span> <span class="token keyword">instanceof</span> <span class="token punctuation">(</span>type<span class="token punctuation">)</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>\u7528\u610F\u4E5F\u975E\u5E38\u7B80\u5355\uFF0C\u5224\u65AD\u5BF9\u8C61\u662F\u5426\u7B26\u5408\u6307\u5B9A\u7684\u7C7B\u578B\uFF0C\u7ED3\u679C\u8981\u4E48\u662F true\uFF0C\u8981\u4E48\u662F false\u3002\u5728\u53CD\u5E8F\u5217\u5316\u7684\u65F6\u5019\uFF0Cinstanceof \u64CD\u4F5C\u7B26\u8FD8\u662F\u86EE\u5E38\u7528\u7684\uFF0C\u56E0\u4E3A\u8FD9\u65F6\u5019\u6211\u4EEC\u4E0D\u592A\u786E\u5B9A\u5BF9\u8C61\u5C5E\u4E0D\u5C5E\u4E8E\u6307\u5B9A\u7684\u7C7B\u578B\uFF0C\u5982\u679C\u4E0D\u8FDB\u884C\u5224\u65AD\u7684\u8BDD\uFF0C\u5C31\u5BB9\u6613\u629B\u51FA ClassCastException \u5F02\u5E38\u3002</p><p>\u6211\u4EEC\u6765\u5EFA\u8FD9\u6837\u4E00\u4E2A\u7B80\u5355\u7684\u7C7B Round\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">class</span> <span class="token class-name">Round</span> <span class="token punctuation">{</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><p>\u7136\u540E\u65B0\u589E\u4E00\u4E2A\u6269\u5C55\u7C7B Ring\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">class</span> <span class="token class-name">Ring</span> <span class="token keyword">extends</span> <span class="token class-name">Round</span> <span class="token punctuation">{</span>
diff --git a/dist/assets/int-cache.html.c609a3a6.js b/dist/assets/int-cache.html.bb142a51.js
similarity index 99%
rename from dist/assets/int-cache.html.c609a3a6.js
rename to dist/assets/int-cache.html.bb142a51.js
index ef3bae37..5acb63ac 100644
--- a/dist/assets/int-cache.html.c609a3a6.js
+++ b/dist/assets/int-cache.html.bb142a51.js
@@ -1,4 +1,4 @@
-import{_ as t}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o,c,a as s,b as l,e as a,d as n}from"./app.a0271b9c.js";const i={},u=a(`<h1 id="java\u4E2Dint\u3001integer\u3001new-integer\u4E4B\u95F4\u7684\u533A\u522B" tabindex="-1"><a class="header-anchor" href="#java\u4E2Dint\u3001integer\u3001new-integer\u4E4B\u95F4\u7684\u533A\u522B" aria-hidden="true">#</a> Java\u4E2Dint\u3001Integer\u3001new Integer\u4E4B\u95F4\u7684\u533A\u522B</h1><p>\u201C\u4E09\u59B9\uFF0C\u4ECA\u5929\u6211\u4EEC\u6765\u8865\u4E00\u4E2A\u5C0F\u7684\u77E5\u8BC6\u70B9\uFF1AJava \u6570\u636E\u7C7B\u578B\u7F13\u5B58\u6C60\u3002\u201D\u6211\u559D\u4E86\u4E00\u53E3\u67B8\u675E\u6CE1\u7684\u8336\u540E\u5BF9\u4E09\u59B9\u8BF4\uFF0C\u201C\u8003\u4F60\u4E00\u4E2A\u95EE\u9898\u54C8\uFF1A<code>new Integer(18) \u4E0E Integer.valueOf(18) </code> \u7684\u533A\u522B\u662F\u4EC0\u4E48\uFF1F\u201D</p><p>\u201C\u96BE\u9053\u4E0D\u4E00\u6837\u5417\uFF1F\u201D\u4E09\u59B9\u6709\u70B9\u8BE7\u5F02\u3002</p><p>\u201C\u4E0D\u4E00\u6837\u7684\u3002\u201D\u6211\u7B11\u7740\u8BF4\u3002</p><ul><li><code>new Integer(18)</code> \u6BCF\u6B21\u90FD\u4F1A\u65B0\u5EFA\u4E00\u4E2A\u5BF9\u8C61;</li><li><code>Integer.valueOf(18)</code> \u4F1A\u4F7F\u2F64\u7528\u7F13\u5B58\u6C60\u4E2D\u7684\u5BF9\u8C61\uFF0C\u591A\u6B21\u8C03\u7528\u53EA\u4F1A\u53D6\u540C\u2F00\u4E00\u4E2A\u5BF9\u8C61\u7684\u5F15\u7528\u3002</li></ul><p>\u6765\u770B\u4E0B\u9762\u8FD9\u6BB5\u4EE3\u7801\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">Integer</span> x <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">Integer</span><span class="token punctuation">(</span><span class="token number">18</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
+import{_ as t}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o,c,a as s,b as l,e as a,d as n}from"./app.615e41d8.js";const i={},u=a(`<h1 id="java\u4E2Dint\u3001integer\u3001new-integer\u4E4B\u95F4\u7684\u533A\u522B" tabindex="-1"><a class="header-anchor" href="#java\u4E2Dint\u3001integer\u3001new-integer\u4E4B\u95F4\u7684\u533A\u522B" aria-hidden="true">#</a> Java\u4E2Dint\u3001Integer\u3001new Integer\u4E4B\u95F4\u7684\u533A\u522B</h1><p>\u201C\u4E09\u59B9\uFF0C\u4ECA\u5929\u6211\u4EEC\u6765\u8865\u4E00\u4E2A\u5C0F\u7684\u77E5\u8BC6\u70B9\uFF1AJava \u6570\u636E\u7C7B\u578B\u7F13\u5B58\u6C60\u3002\u201D\u6211\u559D\u4E86\u4E00\u53E3\u67B8\u675E\u6CE1\u7684\u8336\u540E\u5BF9\u4E09\u59B9\u8BF4\uFF0C\u201C\u8003\u4F60\u4E00\u4E2A\u95EE\u9898\u54C8\uFF1A<code>new Integer(18) \u4E0E Integer.valueOf(18) </code> \u7684\u533A\u522B\u662F\u4EC0\u4E48\uFF1F\u201D</p><p>\u201C\u96BE\u9053\u4E0D\u4E00\u6837\u5417\uFF1F\u201D\u4E09\u59B9\u6709\u70B9\u8BE7\u5F02\u3002</p><p>\u201C\u4E0D\u4E00\u6837\u7684\u3002\u201D\u6211\u7B11\u7740\u8BF4\u3002</p><ul><li><code>new Integer(18)</code> \u6BCF\u6B21\u90FD\u4F1A\u65B0\u5EFA\u4E00\u4E2A\u5BF9\u8C61;</li><li><code>Integer.valueOf(18)</code> \u4F1A\u4F7F\u2F64\u7528\u7F13\u5B58\u6C60\u4E2D\u7684\u5BF9\u8C61\uFF0C\u591A\u6B21\u8C03\u7528\u53EA\u4F1A\u53D6\u540C\u2F00\u4E00\u4E2A\u5BF9\u8C61\u7684\u5F15\u7528\u3002</li></ul><p>\u6765\u770B\u4E0B\u9762\u8FD9\u6BB5\u4EE3\u7801\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">Integer</span> x <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">Integer</span><span class="token punctuation">(</span><span class="token number">18</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 <span class="token class-name">Integer</span> y <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">Integer</span><span class="token punctuation">(</span><span class="token number">18</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span>x <span class="token operator">==</span> y<span class="token punctuation">)</span><span class="token punctuation">;</span>
 
diff --git a/dist/assets/interface.html.60cd9cd7.js b/dist/assets/interface.html.de30e51e.js
similarity index 99%
rename from dist/assets/interface.html.60cd9cd7.js
rename to dist/assets/interface.html.de30e51e.js
index d7d66927..0b84f274 100644
--- a/dist/assets/interface.html.60cd9cd7.js
+++ b/dist/assets/interface.html.de30e51e.js
@@ -1,4 +1,4 @@
-import{_ as e}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o as t,c,a as n,b as o,d as s,e as l}from"./app.a0271b9c.js";const i={},u=n("h1",{id:"java\u63A5\u53E3",tabindex:"-1"},[n("a",{class:"header-anchor",href:"#java\u63A5\u53E3","aria-hidden":"true"},"#"),s(" Java\u63A5\u53E3")],-1),d=n("p",null,"\u201C\u54E5\uFF0C\u6211\u770B\u4F60\u670B\u53CB\u5708\u8BF4\u300AJava \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF\u300B\u4E13\u680F\u6536\u5230\u4E86\u7B2C\u4E00\u7B14\u8D5E\u8D4F\u5440\uFF0C\u867D\u7136\u53EA\u6709\u4E00\u5757\u94B1\uFF0C\u4F46\u6211\u4E5F\u66FF\u4F60\u611F\u5230\u5F00\u5FC3\u3002\u201D\u4E09\u59B9\u7684\u8138\u4E0A\u6D0B\u6EA2\u7740\u81EA\u4FE1\u7684\u5FAE\u7B11\uFF0C\u4EFF\u4F5B\u8FD9\u94B1\u662F\u6253\u7ED9\u5979\u7684\u4E00\u6837\u3002",-1),r=n("p",null,[n("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/object-class/interface-01.png",alt:""})],-1),k=n("p",null,"\u201C\u662F\u554A\uFF0C\u65E9\u4E0A\u8D77\u6765\u7684\u65F6\u5019\u770B\u5230\u8FD9\u6761\u4FE1\u606F\uFF0C\u8FD8\u771F\u7684\u662F\u633A\u5F00\u5FC3\u7684\uFF0C\u867D\u7136\u53EA\u6709\u4E00\u5757\u94B1\uFF0C\u4F46\u662F\u5F00\u6E90\u7684\u7B2C\u4E00\u7B14\uFF0C\u4E5F\u662F\u6211\u4EBA\u751F\u5F53\u4E2D\u7684\u7B2C\u4E00\u7B14\uFF0C\u771F\u7684\u975E\u5E38\u611F\u8C22\u8FD9\u4E2A\u8BFB\u8005\uFF0C\u503C\u5F97\u7EAA\u5FF5\u7684\u4E00\u5929\u3002\u201D\u6211\u81EA\u5DF1\u4E5F\u63A9\u9970\u4E0D\u4F4F\u5185\u5FC3\u7684\u6FC0\u52A8\u3002",-1),v=n("p",null,"\u201C\u6709\u4E86\u8FD9\u4EFD\u9F13\u52B1\uFF0C\u6211\u76F8\u4FE1\u4F60\u66F4\u65B0\u4E0B\u53BB\u7684\u52A8\u529B\u66F4\u8DB3\u4E86\uFF01\u201D\u4E09\u59B9\u4ECA\u5929\u8BF4\u7684\u8BDD\u771F\u7684\u662F\u7279\u522B\u4EE4\u4EBA\u559C\u6B22\u3002",-1),m=n("p",null,[n("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/object-class/interface-02.png",alt:""})],-1),b=s("\u201C\u662F\u554A\u662F\u554A\uFF0C\u6240\u4EE5\uFF0C\u4ECA\u5929\u8981\u66F4\u65B0\u7B2C 26 \u8BB2\u4E86\u2014\u2014\u63A5\u53E3\u3002\u201D\u6211\u63A5\u7740\u8BF4\uFF0C\u201C\u5BF9\u4E8E\u9762\u5411\u5BF9\u8C61\u7F16\u7A0B\u6765\u8BF4\uFF0C\u62BD\u8C61\u662F\u4E00\u4E2A\u6781\u5177\u9B45\u529B\u7684\u7279\u5F81\u3002\u5982\u679C\u4E00\u4E2A\u7A0B\u5E8F\u5458\u7684\u62BD\u8C61\u601D\u7EF4\u5F88\u5DEE\uFF0C\u90A3\u4ED6\u5728\u7F16\u7A0B\u4E2D\u5C31\u4F1A\u9047\u5230\u5F88\u591A\u56F0\u96BE\uFF0C\u65E0\u6CD5\u628A\u4E1A\u52A1\u53D8\u6210\u5177\u4F53\u7684\u4EE3\u7801\u3002\u5728 Java \u4E2D\uFF0C\u53EF\u4EE5\u901A\u8FC7\u4E24\u79CD\u5F62\u5F0F\u6765\u8FBE\u5230\u62BD\u8C61\u7684\u76EE\u7684\uFF0C\u4E00\u79CD\u4E0A\u4E00\u7BC7\u7684\u4E3B\u89D2\u2014\u2014"),g={href:"https://mp.weixin.qq.com/s/WSmGwdtlimIFVVDVKfvrWQ",target:"_blank",rel:"noopener noreferrer"},y=s("\u62BD\u8C61\u7C7B"),w=s("\uFF0C\u53E6\u5916\u4E00\u79CD\u5C31\u662F\u4ECA\u5929\u7684\u4E3B\u89D2\u2014\u2014\u63A5\u53E3\u3002\u201D"),f=l(`<hr><p>\u201C\u63A5\u53E3\u662F\u4EC0\u4E48\u5440\uFF1F\u201D\u4E09\u59B9\u987A\u7740\u6211\u7684\u8BDD\u9898\u53CA\u65F6\u7684\u63D2\u8BDD\u5230\u3002</p><p>\u63A5\u53E3\u901A\u8FC7 interface \u5173\u952E\u5B57\u6765\u5B9A\u4E49\uFF0C\u5B83\u53EF\u4EE5\u5305\u542B\u4E00\u4E9B\u5E38\u91CF\u548C\u65B9\u6CD5\uFF0C\u6765\u770B\u4E0B\u9762\u8FD9\u4E2A\u793A\u4F8B\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">interface</span> <span class="token class-name">Electronic</span> <span class="token punctuation">{</span>
+import{_ as e}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o as t,c,a as n,b as o,d as s,e as l}from"./app.615e41d8.js";const i={},u=n("h1",{id:"java\u63A5\u53E3",tabindex:"-1"},[n("a",{class:"header-anchor",href:"#java\u63A5\u53E3","aria-hidden":"true"},"#"),s(" Java\u63A5\u53E3")],-1),d=n("p",null,"\u201C\u54E5\uFF0C\u6211\u770B\u4F60\u670B\u53CB\u5708\u8BF4\u300AJava \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF\u300B\u4E13\u680F\u6536\u5230\u4E86\u7B2C\u4E00\u7B14\u8D5E\u8D4F\u5440\uFF0C\u867D\u7136\u53EA\u6709\u4E00\u5757\u94B1\uFF0C\u4F46\u6211\u4E5F\u66FF\u4F60\u611F\u5230\u5F00\u5FC3\u3002\u201D\u4E09\u59B9\u7684\u8138\u4E0A\u6D0B\u6EA2\u7740\u81EA\u4FE1\u7684\u5FAE\u7B11\uFF0C\u4EFF\u4F5B\u8FD9\u94B1\u662F\u6253\u7ED9\u5979\u7684\u4E00\u6837\u3002",-1),r=n("p",null,[n("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/object-class/interface-01.png",alt:""})],-1),k=n("p",null,"\u201C\u662F\u554A\uFF0C\u65E9\u4E0A\u8D77\u6765\u7684\u65F6\u5019\u770B\u5230\u8FD9\u6761\u4FE1\u606F\uFF0C\u8FD8\u771F\u7684\u662F\u633A\u5F00\u5FC3\u7684\uFF0C\u867D\u7136\u53EA\u6709\u4E00\u5757\u94B1\uFF0C\u4F46\u662F\u5F00\u6E90\u7684\u7B2C\u4E00\u7B14\uFF0C\u4E5F\u662F\u6211\u4EBA\u751F\u5F53\u4E2D\u7684\u7B2C\u4E00\u7B14\uFF0C\u771F\u7684\u975E\u5E38\u611F\u8C22\u8FD9\u4E2A\u8BFB\u8005\uFF0C\u503C\u5F97\u7EAA\u5FF5\u7684\u4E00\u5929\u3002\u201D\u6211\u81EA\u5DF1\u4E5F\u63A9\u9970\u4E0D\u4F4F\u5185\u5FC3\u7684\u6FC0\u52A8\u3002",-1),v=n("p",null,"\u201C\u6709\u4E86\u8FD9\u4EFD\u9F13\u52B1\uFF0C\u6211\u76F8\u4FE1\u4F60\u66F4\u65B0\u4E0B\u53BB\u7684\u52A8\u529B\u66F4\u8DB3\u4E86\uFF01\u201D\u4E09\u59B9\u4ECA\u5929\u8BF4\u7684\u8BDD\u771F\u7684\u662F\u7279\u522B\u4EE4\u4EBA\u559C\u6B22\u3002",-1),m=n("p",null,[n("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/object-class/interface-02.png",alt:""})],-1),b=s("\u201C\u662F\u554A\u662F\u554A\uFF0C\u6240\u4EE5\uFF0C\u4ECA\u5929\u8981\u66F4\u65B0\u7B2C 26 \u8BB2\u4E86\u2014\u2014\u63A5\u53E3\u3002\u201D\u6211\u63A5\u7740\u8BF4\uFF0C\u201C\u5BF9\u4E8E\u9762\u5411\u5BF9\u8C61\u7F16\u7A0B\u6765\u8BF4\uFF0C\u62BD\u8C61\u662F\u4E00\u4E2A\u6781\u5177\u9B45\u529B\u7684\u7279\u5F81\u3002\u5982\u679C\u4E00\u4E2A\u7A0B\u5E8F\u5458\u7684\u62BD\u8C61\u601D\u7EF4\u5F88\u5DEE\uFF0C\u90A3\u4ED6\u5728\u7F16\u7A0B\u4E2D\u5C31\u4F1A\u9047\u5230\u5F88\u591A\u56F0\u96BE\uFF0C\u65E0\u6CD5\u628A\u4E1A\u52A1\u53D8\u6210\u5177\u4F53\u7684\u4EE3\u7801\u3002\u5728 Java \u4E2D\uFF0C\u53EF\u4EE5\u901A\u8FC7\u4E24\u79CD\u5F62\u5F0F\u6765\u8FBE\u5230\u62BD\u8C61\u7684\u76EE\u7684\uFF0C\u4E00\u79CD\u4E0A\u4E00\u7BC7\u7684\u4E3B\u89D2\u2014\u2014"),g={href:"https://mp.weixin.qq.com/s/WSmGwdtlimIFVVDVKfvrWQ",target:"_blank",rel:"noopener noreferrer"},y=s("\u62BD\u8C61\u7C7B"),w=s("\uFF0C\u53E6\u5916\u4E00\u79CD\u5C31\u662F\u4ECA\u5929\u7684\u4E3B\u89D2\u2014\u2014\u63A5\u53E3\u3002\u201D"),f=l(`<hr><p>\u201C\u63A5\u53E3\u662F\u4EC0\u4E48\u5440\uFF1F\u201D\u4E09\u59B9\u987A\u7740\u6211\u7684\u8BDD\u9898\u53CA\u65F6\u7684\u63D2\u8BDD\u5230\u3002</p><p>\u63A5\u53E3\u901A\u8FC7 interface \u5173\u952E\u5B57\u6765\u5B9A\u4E49\uFF0C\u5B83\u53EF\u4EE5\u5305\u542B\u4E00\u4E9B\u5E38\u91CF\u548C\u65B9\u6CD5\uFF0C\u6765\u770B\u4E0B\u9762\u8FD9\u4E2A\u793A\u4F8B\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">interface</span> <span class="token class-name">Electronic</span> <span class="token punctuation">{</span>
     <span class="token comment">// \u5E38\u91CF</span>
     <span class="token class-name">String</span> LED <span class="token operator">=</span> <span class="token string">&quot;LED&quot;</span><span class="token punctuation">;</span>
 
diff --git a/dist/assets/intern.html.57f3b131.js b/dist/assets/intern.html.cb5b47c3.js
similarity index 99%
rename from dist/assets/intern.html.57f3b131.js
rename to dist/assets/intern.html.cb5b47c3.js
index 6313b47f..e614ea8a 100644
--- a/dist/assets/intern.html.57f3b131.js
+++ b/dist/assets/intern.html.cb5b47c3.js
@@ -1,4 +1,4 @@
-import{_ as t}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o,c,a as s,b as i,e as a,d as n}from"./app.a0271b9c.js";const r={},l=a('<h1 id="\u6DF1\u5165\u89E3\u6790-string-intern" tabindex="-1"><a class="header-anchor" href="#\u6DF1\u5165\u89E3\u6790-string-intern" aria-hidden="true">#</a> \u6DF1\u5165\u89E3\u6790 String#intern</h1><p>\u201C\u54E5\uFF0C\u4F60\u53D1\u7ED9\u6211\u7684\u90A3\u7BC7\u6587\u7AE0\u6211\u770B\u4E86\uFF0C\u7ED3\u679C\u76F4\u63A5\u628A\u6211\u7ED9\u770B\u5F97\u4E0D\u60F3\u5B66 Java \u4E86\uFF01\u201D\u4E09\u59B9\u6C14\u51B2\u51B2\u5730\u8BF4\u3002</p><p>\u201C\u54EA\u4E00\u7BC7\u554A\uFF1F\u201D\u770B\u7740\u4E09\u59B9\u9762\u8272\u6C89\u91CD\uFF0C\u6211\u5173\u5FC3\u5730\u95EE\u5230\u3002</p><p>\u201C\u5C31\u662F\u7F8E\u56E2\u6280\u672F\u56E2\u961F\u6DF1\u5165\u89E3\u6790 <code>String.intern()</code> \u90A3\u7BC7\u554A\uFF01\u201D\u4E09\u59B9\u56DE\u7B54\u3002</p><blockquote><p>https://tech.meituan.com/2014/03/06/in-depth-understanding-string-intern.html</p></blockquote><p>\u201C\u54E6\uFF0C\u6211\u60F3\u8D77\u6765\u4E86\uFF0C\u4E0D\u633A\u597D\u4E00\u7BC7\u6587\u7AE0\u561B\uFF0C\u6DF1\u5165\u6D45\u51FA\uFF0C\u7CBE\u54C1\u4E2D\u7684\u7CBE\u54C1\uFF0C\u770B\u5B8C\u540E\u4F60\u5E94\u8BE5\u5BF9 String \u7684 intern \u5F7B\u5E95\u7406\u89E3\u4E86\u624D\u5BF9\u5440\u3002\u201D</p><p>\u201C\u597D\u662F\u597D\uFF0C\u4F46\u6211\u5C31\u662F\u770B\u4E0D\u61C2\uFF01\u201D\u4E09\u59B9\u59D4\u5C48\u5730\u8BF4\uFF0C\u201C\u54E5\uFF0C\u8FD8\u662F\u4F60\u4EB2\u81EA\u7ED9\u6211\u8BB2\u8BB2\u5427\uFF1F\u201D</p>',7),u=n("\u201C\u597D\u5427\uFF0C\u4E0A\u6B21\u5B66\u7684"),d={href:"https://mp.weixin.qq.com/s/b69zXknKLIa3FWs0Yj23xA",target:"_blank",rel:"noopener noreferrer"},k=n("\u5B57\u7B26\u4E32\u5E38\u91CF\u6C60"),g=n("\u4F60\u90FD\u641E\u6E05\u695A\u4E86\u5427\uFF1F\u201D"),m=a(`<p>\u201C\u55EF\u3002\u201D\u4E09\u59B9\u5FAE\u5FAE\u7684\u70B9\u4E86\u70B9\u5934\u3002</p><p>\u8981\u7406\u89E3\u7F8E\u56E2\u6280\u672F\u56E2\u961F\u7684\u8FD9\u7BC7\u6587\u7AE0\uFF0C\u4F60\u53EA\u9700\u8981\u8BB0\u4F4F\u8FD9\u51E0\u70B9\u5185\u5BB9\uFF1A</p><p>\u7B2C\u4E00\uFF0C\u4F7F\u7528\u53CC\u5F15\u53F7\u58F0\u660E\u7684\u5B57\u7B26\u4E32\u5BF9\u8C61\u4F1A\u4FDD\u5B58\u5728\u5B57\u7B26\u4E32\u5E38\u91CF\u6C60\u4E2D\u3002</p><p>\u7B2C\u4E8C\uFF0C\u4F7F\u7528 new \u5173\u952E\u5B57\u521B\u5EFA\u7684\u5B57\u7B26\u4E32\u5BF9\u8C61\u4F1A\u5148\u4ECE\u5B57\u7B26\u4E32\u5E38\u91CF\u6C60\u4E2D\u627E\uFF0C\u5982\u679C\u6CA1\u627E\u5230\u5C31\u521B\u5EFA\u4E00\u4E2A\uFF0C\u7136\u540E\u518D\u5728\u5806\u4E2D\u521B\u5EFA\u5B57\u7B26\u4E32\u5BF9\u8C61\uFF1B\u5982\u679C\u627E\u5230\u4E86\uFF0C\u5C31\u76F4\u63A5\u5728\u5806\u4E2D\u521B\u5EFA\u5B57\u7B26\u4E32\u5BF9\u8C61\u3002</p><p>\u7B2C\u4E09\uFF0C\u9488\u5BF9\u6CA1\u6709\u4F7F\u7528\u53CC\u5F15\u53F7\u58F0\u660E\u7684\u5B57\u7B26\u4E32\u5BF9\u8C61\u6765\u8BF4\uFF0C\u5C31\u50CF\u4E0B\u9762\u4EE3\u7801\u4E2D\u7684 s1 \u90A3\u6837\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">String</span> s1 <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">String</span><span class="token punctuation">(</span><span class="token string">&quot;\u4E8C\u54E5&quot;</span><span class="token punctuation">)</span> <span class="token operator">+</span> <span class="token keyword">new</span> <span class="token class-name">String</span><span class="token punctuation">(</span><span class="token string">&quot;\u4E09\u59B9&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
+import{_ as t}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o,c,a as s,b as i,e as a,d as n}from"./app.615e41d8.js";const r={},l=a('<h1 id="\u6DF1\u5165\u89E3\u6790-string-intern" tabindex="-1"><a class="header-anchor" href="#\u6DF1\u5165\u89E3\u6790-string-intern" aria-hidden="true">#</a> \u6DF1\u5165\u89E3\u6790 String#intern</h1><p>\u201C\u54E5\uFF0C\u4F60\u53D1\u7ED9\u6211\u7684\u90A3\u7BC7\u6587\u7AE0\u6211\u770B\u4E86\uFF0C\u7ED3\u679C\u76F4\u63A5\u628A\u6211\u7ED9\u770B\u5F97\u4E0D\u60F3\u5B66 Java \u4E86\uFF01\u201D\u4E09\u59B9\u6C14\u51B2\u51B2\u5730\u8BF4\u3002</p><p>\u201C\u54EA\u4E00\u7BC7\u554A\uFF1F\u201D\u770B\u7740\u4E09\u59B9\u9762\u8272\u6C89\u91CD\uFF0C\u6211\u5173\u5FC3\u5730\u95EE\u5230\u3002</p><p>\u201C\u5C31\u662F\u7F8E\u56E2\u6280\u672F\u56E2\u961F\u6DF1\u5165\u89E3\u6790 <code>String.intern()</code> \u90A3\u7BC7\u554A\uFF01\u201D\u4E09\u59B9\u56DE\u7B54\u3002</p><blockquote><p>https://tech.meituan.com/2014/03/06/in-depth-understanding-string-intern.html</p></blockquote><p>\u201C\u54E6\uFF0C\u6211\u60F3\u8D77\u6765\u4E86\uFF0C\u4E0D\u633A\u597D\u4E00\u7BC7\u6587\u7AE0\u561B\uFF0C\u6DF1\u5165\u6D45\u51FA\uFF0C\u7CBE\u54C1\u4E2D\u7684\u7CBE\u54C1\uFF0C\u770B\u5B8C\u540E\u4F60\u5E94\u8BE5\u5BF9 String \u7684 intern \u5F7B\u5E95\u7406\u89E3\u4E86\u624D\u5BF9\u5440\u3002\u201D</p><p>\u201C\u597D\u662F\u597D\uFF0C\u4F46\u6211\u5C31\u662F\u770B\u4E0D\u61C2\uFF01\u201D\u4E09\u59B9\u59D4\u5C48\u5730\u8BF4\uFF0C\u201C\u54E5\uFF0C\u8FD8\u662F\u4F60\u4EB2\u81EA\u7ED9\u6211\u8BB2\u8BB2\u5427\uFF1F\u201D</p>',7),u=n("\u201C\u597D\u5427\uFF0C\u4E0A\u6B21\u5B66\u7684"),d={href:"https://mp.weixin.qq.com/s/b69zXknKLIa3FWs0Yj23xA",target:"_blank",rel:"noopener noreferrer"},k=n("\u5B57\u7B26\u4E32\u5E38\u91CF\u6C60"),g=n("\u4F60\u90FD\u641E\u6E05\u695A\u4E86\u5427\uFF1F\u201D"),m=a(`<p>\u201C\u55EF\u3002\u201D\u4E09\u59B9\u5FAE\u5FAE\u7684\u70B9\u4E86\u70B9\u5934\u3002</p><p>\u8981\u7406\u89E3\u7F8E\u56E2\u6280\u672F\u56E2\u961F\u7684\u8FD9\u7BC7\u6587\u7AE0\uFF0C\u4F60\u53EA\u9700\u8981\u8BB0\u4F4F\u8FD9\u51E0\u70B9\u5185\u5BB9\uFF1A</p><p>\u7B2C\u4E00\uFF0C\u4F7F\u7528\u53CC\u5F15\u53F7\u58F0\u660E\u7684\u5B57\u7B26\u4E32\u5BF9\u8C61\u4F1A\u4FDD\u5B58\u5728\u5B57\u7B26\u4E32\u5E38\u91CF\u6C60\u4E2D\u3002</p><p>\u7B2C\u4E8C\uFF0C\u4F7F\u7528 new \u5173\u952E\u5B57\u521B\u5EFA\u7684\u5B57\u7B26\u4E32\u5BF9\u8C61\u4F1A\u5148\u4ECE\u5B57\u7B26\u4E32\u5E38\u91CF\u6C60\u4E2D\u627E\uFF0C\u5982\u679C\u6CA1\u627E\u5230\u5C31\u521B\u5EFA\u4E00\u4E2A\uFF0C\u7136\u540E\u518D\u5728\u5806\u4E2D\u521B\u5EFA\u5B57\u7B26\u4E32\u5BF9\u8C61\uFF1B\u5982\u679C\u627E\u5230\u4E86\uFF0C\u5C31\u76F4\u63A5\u5728\u5806\u4E2D\u521B\u5EFA\u5B57\u7B26\u4E32\u5BF9\u8C61\u3002</p><p>\u7B2C\u4E09\uFF0C\u9488\u5BF9\u6CA1\u6709\u4F7F\u7528\u53CC\u5F15\u53F7\u58F0\u660E\u7684\u5B57\u7B26\u4E32\u5BF9\u8C61\u6765\u8BF4\uFF0C\u5C31\u50CF\u4E0B\u9762\u4EE3\u7801\u4E2D\u7684 s1 \u90A3\u6837\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">String</span> s1 <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">String</span><span class="token punctuation">(</span><span class="token string">&quot;\u4E8C\u54E5&quot;</span><span class="token punctuation">)</span> <span class="token operator">+</span> <span class="token keyword">new</span> <span class="token class-name">String</span><span class="token punctuation">(</span><span class="token string">&quot;\u4E09\u59B9&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>\u5982\u679C\u60F3\u628A s1 \u7684\u5185\u5BB9\u4E5F\u653E\u5165\u5B57\u7B26\u4E32\u5E38\u91CF\u6C60\u7684\u8BDD\uFF0C\u53EF\u4EE5\u8C03\u7528 <code>intern()</code> \u65B9\u6CD5\u6765\u5B8C\u6210\u3002</p><p>\u4E0D\u8FC7\uFF0C\u9700\u8981\u6CE8\u610F\u7684\u662F\uFF0CJava 7 \u7684\u65F6\u5019\uFF0C\u5B57\u7B26\u4E32\u5E38\u91CF\u6C60\u4ECE\u6C38\u4E45\u4EE3\u4E2D\u79FB\u52A8\u5230\u4E86\u5806\u4E2D\uFF0C\u867D\u7136\u6B64\u65F6\u6C38\u4E45\u4EE3\u8FD8\u6CA1\u6709\u5B8C\u5168\u88AB\u79FB\u9664\u3002Java 8 \u7684\u65F6\u5019\uFF0C\u6C38\u4E45\u4EE3\u88AB\u5F7B\u5E95\u79FB\u9664\u3002</p><p>\u8FD9\u4E2A\u53D8\u5316\u4E5F\u76F4\u63A5\u5F71\u54CD\u4E86 <code>String.intern()</code> \u65B9\u6CD5\u5728\u6267\u884C\u65F6\u7684\u7B56\u7565\uFF0CJava 7 \u4E4B\u524D\uFF0C\u6267\u884C <code>String.intern()</code> \u65B9\u6CD5\u7684\u65F6\u5019\uFF0C\u4E0D\u7BA1\u5BF9\u8C61\u5728\u5806\u4E2D\u662F\u5426\u5DF2\u7ECF\u521B\u5EFA\uFF0C\u5B57\u7B26\u4E32\u5E38\u91CF\u6C60\u4E2D\u4ECD\u7136\u4F1A\u521B\u5EFA\u4E00\u4E2A\u5185\u5BB9\u5B8C\u5168\u76F8\u540C\u7684\u65B0\u5BF9\u8C61\uFF1B Java 7 \u4E4B\u540E\u5462\uFF0C\u7531\u4E8E\u5B57\u7B26\u4E32\u5E38\u91CF\u6C60\u653E\u5728\u4E86\u5806\u4E2D\uFF0C\u6267\u884C <code>String.intern()</code> \u65B9\u6CD5\u7684\u65F6\u5019\uFF0C\u5982\u679C\u5BF9\u8C61\u5728\u5806\u4E2D\u5DF2\u7ECF\u521B\u5EFA\u4E86\uFF0C\u5B57\u7B26\u4E32\u5E38\u91CF\u6C60\u4E2D\u5C31\u4E0D\u9700\u8981\u518D\u521B\u5EFA\u65B0\u7684\u5BF9\u8C61\u4E86\uFF0C\u800C\u662F\u76F4\u63A5\u4FDD\u5B58\u5806\u4E2D\u5BF9\u8C61\u7684\u5F15\u7528\uFF0C\u4E5F\u5C31\u8282\u7701\u4E86\u4E00\u90E8\u5206\u7684\u5185\u5B58\u7A7A\u95F4\u3002</p><p>\u201C\u4E09\u59B9\uFF0C\u6765\u731C\u731C\u8FD9\u6BB5\u4EE3\u7801\u8F93\u51FA\u7684\u7ED3\u679C\u5427\u3002\u201D\u6211\u8BF4\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">String</span> s1 <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">String</span><span class="token punctuation">(</span><span class="token string">&quot;\u4E8C\u54E5\u4E09\u59B9&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 <span class="token class-name">String</span> s2 <span class="token operator">=</span> s1<span class="token punctuation">.</span><span class="token function">intern</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span>s1 <span class="token operator">==</span> s2<span class="token punctuation">)</span><span class="token punctuation">;</span>
diff --git a/dist/assets/ioc.html.00ef348c.js b/dist/assets/ioc.html.a79e951b.js
similarity index 99%
rename from dist/assets/ioc.html.00ef348c.js
rename to dist/assets/ioc.html.a79e951b.js
index 28fd7b84..019babd7 100644
--- a/dist/assets/ioc.html.00ef348c.js
+++ b/dist/assets/ioc.html.a79e951b.js
@@ -1,4 +1,4 @@
-import{_ as s}from"./plugin-vue_export-helper.21dcd24c.js";import{r as t,o as p,c as o,a,b as c,e as i,d as e}from"./app.a0271b9c.js";const r={},d=i(`<h1 id="spring-ioc\u626B\u76F2" tabindex="-1"><a class="header-anchor" href="#spring-ioc\u626B\u76F2" aria-hidden="true">#</a> Spring IoC\u626B\u76F2</h1><p>\u5927\u5BB6\u597D\uFF0C\u6211\u662F\u4E8C\u54E5\u5440\u3002\u4E0D\u5E9F\u8BDD\uFF0C\u4ECA\u5929\u6765\u5E26\u4F60\u4E00\u5206\u949F\u73A9\u8F6C Spring IoC\u3002Spring \u6846\u67B6\u662F Java \u540E\u7AEF\u5F00\u53D1\u4E2D\u975E\u5E38\u91CD\u8981\u7684\u57FA\u7840\u6846\u67B6\uFF0C\u53EF\u4EE5\u8BF4\u5FC5\u4E0D\u53EF\u7F3A\uFF0C\u800C IoC \u53C8\u662F Spring \u4F53\u7CFB\u4E2D\u6700\u91CD\u8981\u7684\u4E24\u4E2A\u6982\u5FF5\u4E4B\u4E00\uFF08\u53E6\u5916\u4E00\u4E2A\u662F\u8C01\u5462\uFF1F\uFF09\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/ioc-dfa5b7d3-43c3-492f-a9f5-59d3bf7b242b.jpg" alt=""></p><h2 id="\u662F\u4F55" tabindex="-1"><a class="header-anchor" href="#\u662F\u4F55" aria-hidden="true">#</a> \u662F\u4F55</h2><p>Spring \u5168\u5BB6\u6876\u4E2D\u6700\u91CD\u8981\u7684\u51E0\u4E2A\u9879\u76EE\u90FD\u662F\u57FA\u4E8E Spring Framework \u7684\uFF0C\u6240\u4EE5\u6211\u4EEC\u5C31\u4EE5 Spring Framework \u4E3A\u4F8B\u6765\u770B\u6587\u6863\u3002</p><p>\u9996\u5148\u5B83\u7684\u53F3\u4FA7\u6709 Github \u7684\u94FE\u63A5\uFF0C\u53E6\u5916\u70B9\u5230\u300CLEARN\u300D\u8FD9\u91CC\uFF0C\u5C31\u4F1A\u770B\u5230\u5404\u4E2A\u7248\u672C\u7684\u6587\u6863\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/ioc-ecc7dcc3-678f-4b97-8e2b-42fc0d66f555.jpg" alt=""></p><p>\u90A3\u6211\u4EEC\u70B9\u300CReference Doc\u300D\uFF0C\u5C31\u80FD\u591F\u770B\u5230\u5B83\u7684\u4E00\u4E9B\u6A21\u5757\u7684\u4ECB\u7ECD\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/ioc-7ba176c1-5d76-465d-b2b5-5751d6c1ef3b.jpg" alt=""></p><p>\u7B2C\u4E00\u7AE0 Overview\uFF0C\u8BB2\u8FF0\u5B83\u7684\u5386\u53F2\u3001\u8BBE\u8BA1\u539F\u7406\u7B49\u7B49\uFF1B</p><p>\u7B2C\u4E8C\u7AE0 Core\uFF0C\u5305\u542B\u4E86 IoC \u5BB9\u5668\uFF0CAOP \u7B49\u7B49\uFF0C\u90A3\u81EA\u7136\u662F\u8BB2 Spring \u7684\u6838\u5FC3\u4E86\uFF0C\u8981\u70B9\u8FDB\u53BB\u597D\u597D\u770B\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/ioc-b068d0cc-8e75-42fc-8391-0cc0e2d84fc8.jpg" alt=""></p><p>\u70B9\u8FDB\u53BB\u4E4B\u540E\u53D1\u73B0\u4E86\u5B9D\u8D35\u7684\u5B66\u4E60\u8D44\u6599\uFF0C\u4E00\u5207\u7684 what, why, how \u90FD\u53EF\u4EE5\u5728\u8FD9\u91CC\u627E\u5230\u7B54\u6848\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/ioc-e1f5ad2c-2b1a-453e-8672-dd4b6560eb7a.jpg" alt=""></p><p>\u8FD9\u91CC\u5F88\u597D\u7684\u89E3\u91CA\u4E86\u5927\u540D\u9F0E\u9F0E\u7684 IoC - Inversion of Control, \u63A7\u5236\u53CD\u8F6C\u3002</p><p>\u6211\u7C97\u7565\u7684\u603B\u7ED3\u4E00\u4E0B\uFF1A\u63A7\u5236\u53CD\u8F6C\u5C31\u662F\u628A\u521B\u5EFA\u548C\u7BA1\u7406 bean \u7684\u8FC7\u7A0B\u8F6C\u79FB\u7ED9\u4E86\u7B2C\u4E09\u65B9\u3002\u800C\u8FD9\u4E2A\u7B2C\u4E09\u65B9\uFF0C\u5C31\u662F Spring IoC Container\uFF0C\u5BF9\u4E8E IoC \u6765\u8BF4\uFF0C\u6700\u91CD\u8981\u7684\u5C31\u662F<strong>\u5BB9\u5668</strong>\u3002</p><p>\u5BB9\u5668\u8D1F\u8D23\u521B\u5EFA\u3001\u914D\u7F6E\u548C\u7BA1\u7406 bean\uFF0C\u4E5F\u5C31\u662F\u5B83\u7BA1\u7406\u7740 bean \u7684\u751F\u547D\uFF0C\u63A7\u5236\u7740 bean \u7684\u4F9D\u8D56\u6CE8\u5165\u3002</p><p>\u901A\u4FD7\u70B9\u8BB2\uFF0C\u56E0\u4E3A\u9879\u76EE\u4E2D\u6BCF\u6B21\u521B\u5EFA\u5BF9\u8C61\u662F\u5F88\u9EBB\u70E6\u7684\uFF0C\u6240\u4EE5\u6211\u4EEC\u4F7F\u7528 Spring IoC \u5BB9\u5668\u6765\u7BA1\u7406\u8FD9\u4E9B\u5BF9\u8C61\uFF0C\u9700\u8981\u7684\u65F6\u5019\u4F60\u5C31\u76F4\u63A5\u7528\uFF0C\u4E0D\u7528\u7BA1\u5B83\u662F\u600E\u4E48\u6765\u7684\u3001\u4EC0\u4E48\u65F6\u5019\u8981\u9500\u6BC1\uFF0C\u53EA\u7BA1\u7528\u5C31\u597D\u4E86\u3002</p><p>\u4E3E\u4E2A\u4F8B\u5B50\uFF0C\u5C31\u597D\u50CF\u7236\u6BCD\u6CA1\u65F6\u95F4\u7BA1\u5B69\u5B50\uFF0C\u5C31\u628A\u5C0F\u670B\u53CB\u4EA4\u7ED9\u6258\u7BA1\u6240\uFF0C\u5C31\u5B89\u5FC3\u7684\u53BB\u4E0A\u73ED\u800C\u4E0D\u7528\u7BA1\u5B69\u5B50\u4E86\u3002\u6258\u513F\u6240\uFF0C\u5C31\u662F\u7B2C\u4E09\u65B9\u5BB9\u5668\uFF0C\u8D1F\u8D23\u7BA1\u7406\u5C0F\u670B\u53CB\u7684\u5403\u559D\u73A9\u4E50\uFF1B\u7236\u6BCD\uFF0C\u76F8\u5F53\u4E8E\u7A0B\u5E8F\u5458\uFF0C\u53EA\u7BA1\u63A5\u9001\u5B69\u5B50\uFF0C\u4E0D\u7528\u7BA1\u4ED6\u4EEC\u5403\u559D\u3002</p><p>\u7B49\u4E0B\uFF0C<code>bean</code>\xA0\u53C8\u662F\u4EC0\u4E48\uFF1F</p><p>Bean \u5176\u5B9E\u5C31\u662F\u5305\u88C5\u4E86\u7684 Object\uFF0C\u65E0\u8BBA\u662F\u63A7\u5236\u53CD\u8F6C\u8FD8\u662F\u4F9D\u8D56\u6CE8\u5165\uFF0C\u5B83\u4EEC\u7684\u4E3B\u8BED\u90FD\u662F object\uFF0C\u800C bean \u5C31\u662F\u7531\u7B2C\u4E09\u65B9\u5305\u88C5\u597D\u4E86\u7684 object\u3002\uFF08\u60F3\u4E00\u4E0B\u522B\u4EBA\u9001\u793C\u7269\u7ED9\u4F60\u7684\u65F6\u5019\u90FD\u662F\u8981\u5305\u88C5\u4E00\u4E0B\u7684\uFF0C\u81EA\u5DF1\u9020\u7684\u5C31\u514D\u4E86\u3002</p><p>Bean \u662F Spring \u7684\u4E3B\u89D2\uFF0C\u6709\u79CD\u8BF4\u6CD5\u53EB Spring \u5C31\u662F\u9762\u5411 bean \u7684\u7F16\u7A0B\uFF08Bean Oriented Programming, BOP\uFF09\u3002</p><h3 id="ioc-\u5BB9\u5668" tabindex="-1"><a class="header-anchor" href="#ioc-\u5BB9\u5668" aria-hidden="true">#</a> IoC \u5BB9\u5668</h3><p>\u65E2\u7136\u8BF4\u5BB9\u5668\u662F IoC \u6700\u91CD\u8981\u7684\u90E8\u5206\uFF0C\u90A3\u4E48 Spring \u5982\u4F55\u8BBE\u8BA1\u5BB9\u5668\u7684\u5462\uFF1F\u8FD8\u662F\u56DE\u5230\u5B98\u7F51\uFF0C\u7B2C\u4E8C\u6BB5\u6709\u4ECB\u7ECD\u54E6\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/ioc-c5c48fc9-162b-4e7c-a660-2984bb7fb69a.jpg" alt=""></p><p>\u7B54\uFF1A\u4F7F\u7528\xA0<code>ApplicationContext</code>\uFF0C\u5B83\u662F\xA0<code>BeanFactory</code>\xA0\u7684\u5B50\u7C7B\uFF0C\u66F4\u597D\u7684\u8865\u5145\u5E76\u5B9E\u73B0\u4E86\xA0<code>BeanFactory</code>\xA0\u7684\u3002</p><p><code>BeanFactory</code>\xA0\u7B80\u5355\u7C97\u66B4\uFF0C\u53EF\u4EE5\u7406\u89E3\u4E3A HashMap\uFF1A</p><ul><li>Key - bean name</li><li>Value - bean object</li></ul><p>\u4F46\u5B83\u4E00\u822C\u53EA\u6709 get, put \u4E24\u4E2A\u529F\u80FD\uFF0C\u6240\u4EE5\u79F0\u4E4B\u4E3A\u201C\u4F4E\u7EA7\u5BB9\u5668\u201D\u3002</p><p>\u800C\xA0<code>ApplicationContext</code>\xA0\u591A\u4E86\u5F88\u591A\u529F\u80FD\uFF0C\u56E0\u4E3A\u5B83\u7EE7\u627F\u4E86\u591A\u4E2A\u63A5\u53E3\uFF0C\u53EF\u79F0\u4E4B\u4E3A\u201C\u9AD8\u7EA7\u5BB9\u5668\u201D\u3002\u5728\u4E0B\u6587\u7684\u642D\u5EFA\u9879\u76EE\u4E2D\uFF0C\u6211\u4EEC\u4F1A\u4F7F\u7528\u5B83\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/ioc-ac7721c3-7892-45a7-840a-2093548f13d6.jpg" alt=""></p><p><code>ApplicationContext</code>\xA0\u7684\u91CC\u9762\u6709\u4E24\u4E2A\u5177\u4F53\u7684\u5B9E\u73B0\u5B50\u7C7B\uFF0C\u7528\u6765\u8BFB\u53D6\u914D\u7F6E\u914D\u4EF6\u7684\uFF1A</p><ul><li><code>ClassPathXmlApplicationContext</code>\xA0- \u4ECE class path \u4E2D\u52A0\u8F7D\u914D\u7F6E\u6587\u4EF6\uFF0C\u66F4\u5E38\u7528\u4E00\u4E9B\uFF1B</li><li><code>FileSystemXmlApplicationContext</code>\xA0- \u4ECE\u672C\u5730\u6587\u4EF6\u4E2D\u52A0\u8F7D\u914D\u7F6E\u6587\u4EF6\uFF0C\u4E0D\u662F\u5F88\u5E38\u7528\uFF0C\u5982\u679C\u518D\u5230 Linux \u73AF\u5883\u4E2D\uFF0C\u8FD8\u8981\u6539\u8DEF\u5F84\uFF0C\u4E0D\u662F\u5F88\u65B9\u4FBF\u3002</li></ul><p>\u5F53\u6211\u4EEC\u70B9\u5F00\xA0<code>ClassPathXmlApplicationContext</code>\xA0\u65F6\uFF0C\u53D1\u73B0\u5B83\u5E76\u4E0D\u662F\u76F4\u63A5\u7EE7\u627F\xA0<code>ApplicationContext</code>\xA0\u7684\uFF0C\u5B83\u6709\u5F88\u591A\u5C42\u7684\u4F9D\u8D56\u5173\u7CFB\uFF0C\u6BCF\u5C42\u7684\u5B50\u7C7B\u90FD\u662F\u5BF9\u7236\u7C7B\u7684\u8865\u5145\u5B9E\u73B0\u3002</p><p>\u800C\u518D\u5F80\u4E0A\u627E\uFF0C\u53D1\u73B0\u6700\u4E0A\u5C42\u7684 class \u56DE\u5230\u4E86\xA0<code>BeanFactory</code>\uFF0C\u6240\u4EE5\u5B83\u975E\u5E38\u91CD\u8981\u3002</p><p>\u8981\u6CE8\u610F\uFF0CSpring \u4E2D\u8FD8\u6709\u4E2A\xA0<code>FactoryBean</code>\uFF0C\u4E24\u8005\u5E76\u6CA1\u6709\u7279\u522B\u7684\u5173\u7CFB\uFF0C\u53EA\u662F\u540D\u5B57\u6BD4\u8F83\u63A5\u8FD1\uFF0C\u6240\u4EE5\u4E0D\u8981\u5F04\u6DF7\u4E86\u987A\u5E8F\u3002</p><p>\u4E3A\u4E86\u597D\u7406\u89E3 IoC\uFF0C\u6211\u4EEC\u5148\u6765\u56DE\u987E\u4E00\u4E0B\u4E0D\u7528 IoC \u65F6\u5199\u4EE3\u7801\u7684\u8FC7\u7A0B\u3002</p><h3 id="\u6DF1\u5165\u7406\u89E3-ioc" tabindex="-1"><a class="header-anchor" href="#\u6DF1\u5165\u7406\u89E3-ioc" aria-hidden="true">#</a> \u6DF1\u5165\u7406\u89E3 IoC</h3><p>\u8FD9\u91CC\u7528\u7ECF\u5178\xA0<code>class Rectangle</code>\xA0\u6765\u4E3E\u4F8B\uFF1A</p><ul><li>\u4E24\u4E2A\u53D8\u91CF\uFF1A\u957F\u548C\u5BBD</li><li>\u81EA\u52A8\u751F\u6210\xA0<code>set()</code>\xA0\u65B9\u6CD5\u548C\xA0<code>toString()</code>\xA0\u65B9\u6CD5</li></ul><p>\u6CE8\u610F \u26A0\uFE0F\uFF1A\u4E00\u5B9A\u8981\u751F\u6210\xA0<code>set()</code>\xA0\u65B9\u6CD5\uFF0C\u56E0\u4E3A Spring IoC \u5C31\u662F\u901A\u8FC7\u8FD9\u4E2A\xA0<code>set()</code>\xA0\u65B9\u6CD5\u6CE8\u5165\u7684\uFF1B<code>toString()</code>\xA0\u65B9\u6CD5\u662F\u4E3A\u4E86\u6211\u4EEC\u65B9\u4FBF\u6253\u5370\u67E5\u770B\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">Rectangle</span> <span class="token punctuation">{</span>
+import{_ as s}from"./plugin-vue_export-helper.21dcd24c.js";import{r as t,o as p,c as o,a,b as c,e as i,d as e}from"./app.615e41d8.js";const r={},d=i(`<h1 id="spring-ioc\u626B\u76F2" tabindex="-1"><a class="header-anchor" href="#spring-ioc\u626B\u76F2" aria-hidden="true">#</a> Spring IoC\u626B\u76F2</h1><p>\u5927\u5BB6\u597D\uFF0C\u6211\u662F\u4E8C\u54E5\u5440\u3002\u4E0D\u5E9F\u8BDD\uFF0C\u4ECA\u5929\u6765\u5E26\u4F60\u4E00\u5206\u949F\u73A9\u8F6C Spring IoC\u3002Spring \u6846\u67B6\u662F Java \u540E\u7AEF\u5F00\u53D1\u4E2D\u975E\u5E38\u91CD\u8981\u7684\u57FA\u7840\u6846\u67B6\uFF0C\u53EF\u4EE5\u8BF4\u5FC5\u4E0D\u53EF\u7F3A\uFF0C\u800C IoC \u53C8\u662F Spring \u4F53\u7CFB\u4E2D\u6700\u91CD\u8981\u7684\u4E24\u4E2A\u6982\u5FF5\u4E4B\u4E00\uFF08\u53E6\u5916\u4E00\u4E2A\u662F\u8C01\u5462\uFF1F\uFF09\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/ioc-dfa5b7d3-43c3-492f-a9f5-59d3bf7b242b.jpg" alt=""></p><h2 id="\u662F\u4F55" tabindex="-1"><a class="header-anchor" href="#\u662F\u4F55" aria-hidden="true">#</a> \u662F\u4F55</h2><p>Spring \u5168\u5BB6\u6876\u4E2D\u6700\u91CD\u8981\u7684\u51E0\u4E2A\u9879\u76EE\u90FD\u662F\u57FA\u4E8E Spring Framework \u7684\uFF0C\u6240\u4EE5\u6211\u4EEC\u5C31\u4EE5 Spring Framework \u4E3A\u4F8B\u6765\u770B\u6587\u6863\u3002</p><p>\u9996\u5148\u5B83\u7684\u53F3\u4FA7\u6709 Github \u7684\u94FE\u63A5\uFF0C\u53E6\u5916\u70B9\u5230\u300CLEARN\u300D\u8FD9\u91CC\uFF0C\u5C31\u4F1A\u770B\u5230\u5404\u4E2A\u7248\u672C\u7684\u6587\u6863\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/ioc-ecc7dcc3-678f-4b97-8e2b-42fc0d66f555.jpg" alt=""></p><p>\u90A3\u6211\u4EEC\u70B9\u300CReference Doc\u300D\uFF0C\u5C31\u80FD\u591F\u770B\u5230\u5B83\u7684\u4E00\u4E9B\u6A21\u5757\u7684\u4ECB\u7ECD\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/ioc-7ba176c1-5d76-465d-b2b5-5751d6c1ef3b.jpg" alt=""></p><p>\u7B2C\u4E00\u7AE0 Overview\uFF0C\u8BB2\u8FF0\u5B83\u7684\u5386\u53F2\u3001\u8BBE\u8BA1\u539F\u7406\u7B49\u7B49\uFF1B</p><p>\u7B2C\u4E8C\u7AE0 Core\uFF0C\u5305\u542B\u4E86 IoC \u5BB9\u5668\uFF0CAOP \u7B49\u7B49\uFF0C\u90A3\u81EA\u7136\u662F\u8BB2 Spring \u7684\u6838\u5FC3\u4E86\uFF0C\u8981\u70B9\u8FDB\u53BB\u597D\u597D\u770B\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/ioc-b068d0cc-8e75-42fc-8391-0cc0e2d84fc8.jpg" alt=""></p><p>\u70B9\u8FDB\u53BB\u4E4B\u540E\u53D1\u73B0\u4E86\u5B9D\u8D35\u7684\u5B66\u4E60\u8D44\u6599\uFF0C\u4E00\u5207\u7684 what, why, how \u90FD\u53EF\u4EE5\u5728\u8FD9\u91CC\u627E\u5230\u7B54\u6848\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/ioc-e1f5ad2c-2b1a-453e-8672-dd4b6560eb7a.jpg" alt=""></p><p>\u8FD9\u91CC\u5F88\u597D\u7684\u89E3\u91CA\u4E86\u5927\u540D\u9F0E\u9F0E\u7684 IoC - Inversion of Control, \u63A7\u5236\u53CD\u8F6C\u3002</p><p>\u6211\u7C97\u7565\u7684\u603B\u7ED3\u4E00\u4E0B\uFF1A\u63A7\u5236\u53CD\u8F6C\u5C31\u662F\u628A\u521B\u5EFA\u548C\u7BA1\u7406 bean \u7684\u8FC7\u7A0B\u8F6C\u79FB\u7ED9\u4E86\u7B2C\u4E09\u65B9\u3002\u800C\u8FD9\u4E2A\u7B2C\u4E09\u65B9\uFF0C\u5C31\u662F Spring IoC Container\uFF0C\u5BF9\u4E8E IoC \u6765\u8BF4\uFF0C\u6700\u91CD\u8981\u7684\u5C31\u662F<strong>\u5BB9\u5668</strong>\u3002</p><p>\u5BB9\u5668\u8D1F\u8D23\u521B\u5EFA\u3001\u914D\u7F6E\u548C\u7BA1\u7406 bean\uFF0C\u4E5F\u5C31\u662F\u5B83\u7BA1\u7406\u7740 bean \u7684\u751F\u547D\uFF0C\u63A7\u5236\u7740 bean \u7684\u4F9D\u8D56\u6CE8\u5165\u3002</p><p>\u901A\u4FD7\u70B9\u8BB2\uFF0C\u56E0\u4E3A\u9879\u76EE\u4E2D\u6BCF\u6B21\u521B\u5EFA\u5BF9\u8C61\u662F\u5F88\u9EBB\u70E6\u7684\uFF0C\u6240\u4EE5\u6211\u4EEC\u4F7F\u7528 Spring IoC \u5BB9\u5668\u6765\u7BA1\u7406\u8FD9\u4E9B\u5BF9\u8C61\uFF0C\u9700\u8981\u7684\u65F6\u5019\u4F60\u5C31\u76F4\u63A5\u7528\uFF0C\u4E0D\u7528\u7BA1\u5B83\u662F\u600E\u4E48\u6765\u7684\u3001\u4EC0\u4E48\u65F6\u5019\u8981\u9500\u6BC1\uFF0C\u53EA\u7BA1\u7528\u5C31\u597D\u4E86\u3002</p><p>\u4E3E\u4E2A\u4F8B\u5B50\uFF0C\u5C31\u597D\u50CF\u7236\u6BCD\u6CA1\u65F6\u95F4\u7BA1\u5B69\u5B50\uFF0C\u5C31\u628A\u5C0F\u670B\u53CB\u4EA4\u7ED9\u6258\u7BA1\u6240\uFF0C\u5C31\u5B89\u5FC3\u7684\u53BB\u4E0A\u73ED\u800C\u4E0D\u7528\u7BA1\u5B69\u5B50\u4E86\u3002\u6258\u513F\u6240\uFF0C\u5C31\u662F\u7B2C\u4E09\u65B9\u5BB9\u5668\uFF0C\u8D1F\u8D23\u7BA1\u7406\u5C0F\u670B\u53CB\u7684\u5403\u559D\u73A9\u4E50\uFF1B\u7236\u6BCD\uFF0C\u76F8\u5F53\u4E8E\u7A0B\u5E8F\u5458\uFF0C\u53EA\u7BA1\u63A5\u9001\u5B69\u5B50\uFF0C\u4E0D\u7528\u7BA1\u4ED6\u4EEC\u5403\u559D\u3002</p><p>\u7B49\u4E0B\uFF0C<code>bean</code>\xA0\u53C8\u662F\u4EC0\u4E48\uFF1F</p><p>Bean \u5176\u5B9E\u5C31\u662F\u5305\u88C5\u4E86\u7684 Object\uFF0C\u65E0\u8BBA\u662F\u63A7\u5236\u53CD\u8F6C\u8FD8\u662F\u4F9D\u8D56\u6CE8\u5165\uFF0C\u5B83\u4EEC\u7684\u4E3B\u8BED\u90FD\u662F object\uFF0C\u800C bean \u5C31\u662F\u7531\u7B2C\u4E09\u65B9\u5305\u88C5\u597D\u4E86\u7684 object\u3002\uFF08\u60F3\u4E00\u4E0B\u522B\u4EBA\u9001\u793C\u7269\u7ED9\u4F60\u7684\u65F6\u5019\u90FD\u662F\u8981\u5305\u88C5\u4E00\u4E0B\u7684\uFF0C\u81EA\u5DF1\u9020\u7684\u5C31\u514D\u4E86\u3002</p><p>Bean \u662F Spring \u7684\u4E3B\u89D2\uFF0C\u6709\u79CD\u8BF4\u6CD5\u53EB Spring \u5C31\u662F\u9762\u5411 bean \u7684\u7F16\u7A0B\uFF08Bean Oriented Programming, BOP\uFF09\u3002</p><h3 id="ioc-\u5BB9\u5668" tabindex="-1"><a class="header-anchor" href="#ioc-\u5BB9\u5668" aria-hidden="true">#</a> IoC \u5BB9\u5668</h3><p>\u65E2\u7136\u8BF4\u5BB9\u5668\u662F IoC \u6700\u91CD\u8981\u7684\u90E8\u5206\uFF0C\u90A3\u4E48 Spring \u5982\u4F55\u8BBE\u8BA1\u5BB9\u5668\u7684\u5462\uFF1F\u8FD8\u662F\u56DE\u5230\u5B98\u7F51\uFF0C\u7B2C\u4E8C\u6BB5\u6709\u4ECB\u7ECD\u54E6\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/ioc-c5c48fc9-162b-4e7c-a660-2984bb7fb69a.jpg" alt=""></p><p>\u7B54\uFF1A\u4F7F\u7528\xA0<code>ApplicationContext</code>\uFF0C\u5B83\u662F\xA0<code>BeanFactory</code>\xA0\u7684\u5B50\u7C7B\uFF0C\u66F4\u597D\u7684\u8865\u5145\u5E76\u5B9E\u73B0\u4E86\xA0<code>BeanFactory</code>\xA0\u7684\u3002</p><p><code>BeanFactory</code>\xA0\u7B80\u5355\u7C97\u66B4\uFF0C\u53EF\u4EE5\u7406\u89E3\u4E3A HashMap\uFF1A</p><ul><li>Key - bean name</li><li>Value - bean object</li></ul><p>\u4F46\u5B83\u4E00\u822C\u53EA\u6709 get, put \u4E24\u4E2A\u529F\u80FD\uFF0C\u6240\u4EE5\u79F0\u4E4B\u4E3A\u201C\u4F4E\u7EA7\u5BB9\u5668\u201D\u3002</p><p>\u800C\xA0<code>ApplicationContext</code>\xA0\u591A\u4E86\u5F88\u591A\u529F\u80FD\uFF0C\u56E0\u4E3A\u5B83\u7EE7\u627F\u4E86\u591A\u4E2A\u63A5\u53E3\uFF0C\u53EF\u79F0\u4E4B\u4E3A\u201C\u9AD8\u7EA7\u5BB9\u5668\u201D\u3002\u5728\u4E0B\u6587\u7684\u642D\u5EFA\u9879\u76EE\u4E2D\uFF0C\u6211\u4EEC\u4F1A\u4F7F\u7528\u5B83\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/ioc-ac7721c3-7892-45a7-840a-2093548f13d6.jpg" alt=""></p><p><code>ApplicationContext</code>\xA0\u7684\u91CC\u9762\u6709\u4E24\u4E2A\u5177\u4F53\u7684\u5B9E\u73B0\u5B50\u7C7B\uFF0C\u7528\u6765\u8BFB\u53D6\u914D\u7F6E\u914D\u4EF6\u7684\uFF1A</p><ul><li><code>ClassPathXmlApplicationContext</code>\xA0- \u4ECE class path \u4E2D\u52A0\u8F7D\u914D\u7F6E\u6587\u4EF6\uFF0C\u66F4\u5E38\u7528\u4E00\u4E9B\uFF1B</li><li><code>FileSystemXmlApplicationContext</code>\xA0- \u4ECE\u672C\u5730\u6587\u4EF6\u4E2D\u52A0\u8F7D\u914D\u7F6E\u6587\u4EF6\uFF0C\u4E0D\u662F\u5F88\u5E38\u7528\uFF0C\u5982\u679C\u518D\u5230 Linux \u73AF\u5883\u4E2D\uFF0C\u8FD8\u8981\u6539\u8DEF\u5F84\uFF0C\u4E0D\u662F\u5F88\u65B9\u4FBF\u3002</li></ul><p>\u5F53\u6211\u4EEC\u70B9\u5F00\xA0<code>ClassPathXmlApplicationContext</code>\xA0\u65F6\uFF0C\u53D1\u73B0\u5B83\u5E76\u4E0D\u662F\u76F4\u63A5\u7EE7\u627F\xA0<code>ApplicationContext</code>\xA0\u7684\uFF0C\u5B83\u6709\u5F88\u591A\u5C42\u7684\u4F9D\u8D56\u5173\u7CFB\uFF0C\u6BCF\u5C42\u7684\u5B50\u7C7B\u90FD\u662F\u5BF9\u7236\u7C7B\u7684\u8865\u5145\u5B9E\u73B0\u3002</p><p>\u800C\u518D\u5F80\u4E0A\u627E\uFF0C\u53D1\u73B0\u6700\u4E0A\u5C42\u7684 class \u56DE\u5230\u4E86\xA0<code>BeanFactory</code>\uFF0C\u6240\u4EE5\u5B83\u975E\u5E38\u91CD\u8981\u3002</p><p>\u8981\u6CE8\u610F\uFF0CSpring \u4E2D\u8FD8\u6709\u4E2A\xA0<code>FactoryBean</code>\uFF0C\u4E24\u8005\u5E76\u6CA1\u6709\u7279\u522B\u7684\u5173\u7CFB\uFF0C\u53EA\u662F\u540D\u5B57\u6BD4\u8F83\u63A5\u8FD1\uFF0C\u6240\u4EE5\u4E0D\u8981\u5F04\u6DF7\u4E86\u987A\u5E8F\u3002</p><p>\u4E3A\u4E86\u597D\u7406\u89E3 IoC\uFF0C\u6211\u4EEC\u5148\u6765\u56DE\u987E\u4E00\u4E0B\u4E0D\u7528 IoC \u65F6\u5199\u4EE3\u7801\u7684\u8FC7\u7A0B\u3002</p><h3 id="\u6DF1\u5165\u7406\u89E3-ioc" tabindex="-1"><a class="header-anchor" href="#\u6DF1\u5165\u7406\u89E3-ioc" aria-hidden="true">#</a> \u6DF1\u5165\u7406\u89E3 IoC</h3><p>\u8FD9\u91CC\u7528\u7ECF\u5178\xA0<code>class Rectangle</code>\xA0\u6765\u4E3E\u4F8B\uFF1A</p><ul><li>\u4E24\u4E2A\u53D8\u91CF\uFF1A\u957F\u548C\u5BBD</li><li>\u81EA\u52A8\u751F\u6210\xA0<code>set()</code>\xA0\u65B9\u6CD5\u548C\xA0<code>toString()</code>\xA0\u65B9\u6CD5</li></ul><p>\u6CE8\u610F \u26A0\uFE0F\uFF1A\u4E00\u5B9A\u8981\u751F\u6210\xA0<code>set()</code>\xA0\u65B9\u6CD5\uFF0C\u56E0\u4E3A Spring IoC \u5C31\u662F\u901A\u8FC7\u8FD9\u4E2A\xA0<code>set()</code>\xA0\u65B9\u6CD5\u6CE8\u5165\u7684\uFF1B<code>toString()</code>\xA0\u65B9\u6CD5\u662F\u4E3A\u4E86\u6211\u4EEC\u65B9\u4FBF\u6253\u5370\u67E5\u770B\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">Rectangle</span> <span class="token punctuation">{</span>
     <span class="token keyword">private</span> <span class="token keyword">int</span> width<span class="token punctuation">;</span>
     <span class="token keyword">private</span> <span class="token keyword">int</span> length<span class="token punctuation">;</span>
 
diff --git a/dist/assets/iterator-iterable.html.df321c38.js b/dist/assets/iterator-iterable.html.7a5374e3.js
similarity index 99%
rename from dist/assets/iterator-iterable.html.df321c38.js
rename to dist/assets/iterator-iterable.html.7a5374e3.js
index 23376b24..c6642e00 100644
--- a/dist/assets/iterator-iterable.html.df321c38.js
+++ b/dist/assets/iterator-iterable.html.7a5374e3.js
@@ -1,4 +1,4 @@
-import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e as t}from"./app.a0271b9c.js";const p={},e=t(`<h1 id="java\u4E2D\u7684iterator\u548Citerable\u533A\u522B" tabindex="-1"><a class="header-anchor" href="#java\u4E2D\u7684iterator\u548Citerable\u533A\u522B" aria-hidden="true">#</a> Java\u4E2D\u7684Iterator\u548CIterable\u533A\u522B</h1><p>\u90A3\u5929\uFF0C\u5C0F\u4E8C\u53BB\u6D77\u5EB7\u5A01\u89C6\u9762\u8BD5\uFF0C\u9762\u8BD5\u5B98\u8001\u738B\u4E00\u4E0A\u6765\u5C31\u7529\u7ED9\u4E86\u4ED6\u4E00\u9053\u9762\u8BD5\u9898\uFF1A\u8BF7\u95EE Iterator\u4E0EIterable\u6709\u4EC0\u4E48\u533A\u522B\uFF1F</p><hr><p>\u5728 Java \u4E2D\uFF0C\u6211\u4EEC\u5BF9 List \u8FDB\u884C\u904D\u5386\u7684\u65F6\u5019\uFF0C\u4E3B\u8981\u6709\u8FD9\u4E48\u4E09\u79CD\u65B9\u5F0F\u3002</p><p>\u7B2C\u4E00\u79CD\uFF1Afor \u5FAA\u73AF\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">for</span> <span class="token punctuation">(</span><span class="token keyword">int</span> i <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span> i <span class="token operator">&lt;</span> list<span class="token punctuation">.</span><span class="token function">size</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> i<span class="token operator">++</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
+import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e as t}from"./app.615e41d8.js";const p={},e=t(`<h1 id="java\u4E2D\u7684iterator\u548Citerable\u533A\u522B" tabindex="-1"><a class="header-anchor" href="#java\u4E2D\u7684iterator\u548Citerable\u533A\u522B" aria-hidden="true">#</a> Java\u4E2D\u7684Iterator\u548CIterable\u533A\u522B</h1><p>\u90A3\u5929\uFF0C\u5C0F\u4E8C\u53BB\u6D77\u5EB7\u5A01\u89C6\u9762\u8BD5\uFF0C\u9762\u8BD5\u5B98\u8001\u738B\u4E00\u4E0A\u6765\u5C31\u7529\u7ED9\u4E86\u4ED6\u4E00\u9053\u9762\u8BD5\u9898\uFF1A\u8BF7\u95EE Iterator\u4E0EIterable\u6709\u4EC0\u4E48\u533A\u522B\uFF1F</p><hr><p>\u5728 Java \u4E2D\uFF0C\u6211\u4EEC\u5BF9 List \u8FDB\u884C\u904D\u5386\u7684\u65F6\u5019\uFF0C\u4E3B\u8981\u6709\u8FD9\u4E48\u4E09\u79CD\u65B9\u5F0F\u3002</p><p>\u7B2C\u4E00\u79CD\uFF1Afor \u5FAA\u73AF\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">for</span> <span class="token punctuation">(</span><span class="token keyword">int</span> i <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span> i <span class="token operator">&lt;</span> list<span class="token punctuation">.</span><span class="token function">size</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> i<span class="token operator">++</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
     <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">print</span><span class="token punctuation">(</span>list<span class="token punctuation">.</span><span class="token function">get</span><span class="token punctuation">(</span>i<span class="token punctuation">)</span> <span class="token operator">+</span> <span class="token string">&quot;\uFF0C&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>\u7B2C\u4E8C\u79CD\uFF1A\u8FED\u4EE3\u5668\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">Iterator</span> it <span class="token operator">=</span> list<span class="token punctuation">.</span><span class="token function">iterator</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
diff --git a/dist/assets/jackson.html.f9f2bbfc.js b/dist/assets/jackson.html.f4471baf.js
similarity index 99%
rename from dist/assets/jackson.html.f9f2bbfc.js
rename to dist/assets/jackson.html.f4471baf.js
index cfc0f3dc..fd5ce8da 100644
--- a/dist/assets/jackson.html.f9f2bbfc.js
+++ b/dist/assets/jackson.html.f4471baf.js
@@ -1,4 +1,4 @@
-import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e}from"./app.a0271b9c.js";const t={},p=e(`<p>\u5728\u5F53\u4ECA\u7684\u7F16\u7A0B\u4E16\u754C\u91CC\uFF0CJSON \u5DF2\u7ECF\u6210\u4E3A\u5C06\u4FE1\u606F\u4ECE\u5BA2\u6237\u7AEF\u4F20\u8F93\u5230\u670D\u52A1\u5668\u7AEF\u7684\u9996\u9009\u534F\u8BAE\uFF0C\u53EF\u4EE5\u597D\u4E0D\u5938\u5F20\u7684\u8BF4\uFF0CXML \u5C31\u662F\u90A3\u4E2A\u88AB\u62CD\u6B7B\u5728\u6C99\u6EE9\u4E0A\u7684\u524D\u6D6A\u3002</p><p>\u5F88\u4E0D\u5E78\u7684\u662F\uFF0CJDK \u6CA1\u6709 JSON \u5E93\uFF0C\u4E0D\u77E5\u9053\u4E3A\u4EC0\u4E48\u4E0D\u641E\u4E00\u4E0B\u3002Log4j \u7684\u65F6\u5019\uFF0C\u4E3A\u4E86\u7ADE\u4E89\uFF0C\u8FD8\u63A8\u51FA\u4E86 java.util.logging\uFF0C\u867D\u7136\u6700\u540E\u4E5F\u6CA1\u591A\u5C11\u4EBA\u7528\u3002</p><p>Java \u4E4B\u6240\u4EE5\u725B\u903C\uFF0C\u5F88\u5927\u7684\u529F\u52B3\u5728\u4E8E\u5B83\u7684\u751F\u6001\u975E\u5E38\u5B8C\u5907\uFF0CJDK \u6CA1\u6709 JSON \u5E93\uFF0C\u7B2C\u4E09\u65B9\u7C7B\u5E93\u6709\u554A\uFF0C\u8FD8\u633A\u4E0D\u9519\uFF0C\u6BD4\u5982\u8BF4\u672C\u7BC7\u7684\u732A\u811A\u2014\u2014Jackson\uFF0CGitHub \u4E0A\u6807\u661F 6.1k\uFF0CSpring Boot \u7684\u9ED8\u8BA4 JSON \u89E3\u6790\u5668\u3002</p><p>\u600E\u4E48\u8BC1\u660E\u8FD9\u4E00\u70B9\u5462\uFF1F</p><p>\u5F53\u6211\u4EEC\u901A\u8FC7 starter \u65B0\u5EFA\u4E00\u4E2A Spring Boot \u7684 Web \u9879\u76EE\u540E\uFF0C\u5C31\u53EF\u4EE5\u5728 Maven \u7684\u4F9D\u8D56\u9879\u4E2D\u770B\u5230 Jackson \u7684\u8EAB\u5F71\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/jackson-4340975c-e254-4287-88e0-66f73fe88889.png" alt=""></p><p>Jackson \u6709\u5F88\u591A\u4F18\u70B9\uFF1A</p><ul><li>\u89E3\u6790\u5927\u6587\u4EF6\u7684\u901F\u5EA6\u6BD4\u8F83\u5FEB\uFF1B</li><li>\u8FD0\u884C\u65F6\u5360\u7528\u7684\u5185\u5B58\u6BD4\u8F83\u5C11\uFF0C\u6027\u80FD\u66F4\u4F73\uFF1B</li><li>API \u5F88\u7075\u6D3B\uFF0C\u5BB9\u6613\u8FDB\u884C\u6269\u5C55\u548C\u5B9A\u5236\u3002</li></ul><p>Jackson \u7684\u6838\u5FC3\u6A21\u5757\u7531\u4E09\u90E8\u5206\u7EC4\u6210\uFF1A</p><ul><li>jackson-core\uFF0C\u6838\u5FC3\u5305\uFF0C\u63D0\u4F9B\u57FA\u4E8E\u201C\u6D41\u6A21\u5F0F\u201D\u89E3\u6790\u7684\u76F8\u5173 API\uFF0C\u5305\u62EC JsonPaser \u548C JsonGenerator\u3002</li><li>jackson-annotations\uFF0C\u6CE8\u89E3\u5305\uFF0C\u63D0\u4F9B\u6807\u51C6\u7684\u6CE8\u89E3\u529F\u80FD\uFF1B</li><li>jackson-databind \uFF0C\u6570\u636E\u7ED1\u5B9A\u5305\uFF0C\u63D0\u4F9B\u57FA\u4E8E\u201C\u5BF9\u8C61\u7ED1\u5B9A\u201D\u89E3\u6790\u7684\u76F8\u5173 API \uFF08 ObjectMapper \uFF09 \u548C\u57FA\u4E8E\u201C\u6811\u6A21\u578B\u201D\u89E3\u6790\u7684\u76F8\u5173 API \uFF08JsonNode\uFF09\u3002</li></ul><h3 id="_01\u3001\u5F15\u5165-jackson-\u4F9D\u8D56" tabindex="-1"><a class="header-anchor" href="#_01\u3001\u5F15\u5165-jackson-\u4F9D\u8D56" aria-hidden="true">#</a> 01\u3001\u5F15\u5165 Jackson \u4F9D\u8D56</h3><p>\u8981\u60F3\u4F7F\u7528 Jackson\uFF0C\u9700\u8981\u5728 pom.xml \u6587\u4EF6\u4E2D\u6DFB\u52A0 Jackson \u7684\u4F9D\u8D56\u3002</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
+import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e}from"./app.615e41d8.js";const t={},p=e(`<p>\u5728\u5F53\u4ECA\u7684\u7F16\u7A0B\u4E16\u754C\u91CC\uFF0CJSON \u5DF2\u7ECF\u6210\u4E3A\u5C06\u4FE1\u606F\u4ECE\u5BA2\u6237\u7AEF\u4F20\u8F93\u5230\u670D\u52A1\u5668\u7AEF\u7684\u9996\u9009\u534F\u8BAE\uFF0C\u53EF\u4EE5\u597D\u4E0D\u5938\u5F20\u7684\u8BF4\uFF0CXML \u5C31\u662F\u90A3\u4E2A\u88AB\u62CD\u6B7B\u5728\u6C99\u6EE9\u4E0A\u7684\u524D\u6D6A\u3002</p><p>\u5F88\u4E0D\u5E78\u7684\u662F\uFF0CJDK \u6CA1\u6709 JSON \u5E93\uFF0C\u4E0D\u77E5\u9053\u4E3A\u4EC0\u4E48\u4E0D\u641E\u4E00\u4E0B\u3002Log4j \u7684\u65F6\u5019\uFF0C\u4E3A\u4E86\u7ADE\u4E89\uFF0C\u8FD8\u63A8\u51FA\u4E86 java.util.logging\uFF0C\u867D\u7136\u6700\u540E\u4E5F\u6CA1\u591A\u5C11\u4EBA\u7528\u3002</p><p>Java \u4E4B\u6240\u4EE5\u725B\u903C\uFF0C\u5F88\u5927\u7684\u529F\u52B3\u5728\u4E8E\u5B83\u7684\u751F\u6001\u975E\u5E38\u5B8C\u5907\uFF0CJDK \u6CA1\u6709 JSON \u5E93\uFF0C\u7B2C\u4E09\u65B9\u7C7B\u5E93\u6709\u554A\uFF0C\u8FD8\u633A\u4E0D\u9519\uFF0C\u6BD4\u5982\u8BF4\u672C\u7BC7\u7684\u732A\u811A\u2014\u2014Jackson\uFF0CGitHub \u4E0A\u6807\u661F 6.1k\uFF0CSpring Boot \u7684\u9ED8\u8BA4 JSON \u89E3\u6790\u5668\u3002</p><p>\u600E\u4E48\u8BC1\u660E\u8FD9\u4E00\u70B9\u5462\uFF1F</p><p>\u5F53\u6211\u4EEC\u901A\u8FC7 starter \u65B0\u5EFA\u4E00\u4E2A Spring Boot \u7684 Web \u9879\u76EE\u540E\uFF0C\u5C31\u53EF\u4EE5\u5728 Maven \u7684\u4F9D\u8D56\u9879\u4E2D\u770B\u5230 Jackson \u7684\u8EAB\u5F71\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/jackson-4340975c-e254-4287-88e0-66f73fe88889.png" alt=""></p><p>Jackson \u6709\u5F88\u591A\u4F18\u70B9\uFF1A</p><ul><li>\u89E3\u6790\u5927\u6587\u4EF6\u7684\u901F\u5EA6\u6BD4\u8F83\u5FEB\uFF1B</li><li>\u8FD0\u884C\u65F6\u5360\u7528\u7684\u5185\u5B58\u6BD4\u8F83\u5C11\uFF0C\u6027\u80FD\u66F4\u4F73\uFF1B</li><li>API \u5F88\u7075\u6D3B\uFF0C\u5BB9\u6613\u8FDB\u884C\u6269\u5C55\u548C\u5B9A\u5236\u3002</li></ul><p>Jackson \u7684\u6838\u5FC3\u6A21\u5757\u7531\u4E09\u90E8\u5206\u7EC4\u6210\uFF1A</p><ul><li>jackson-core\uFF0C\u6838\u5FC3\u5305\uFF0C\u63D0\u4F9B\u57FA\u4E8E\u201C\u6D41\u6A21\u5F0F\u201D\u89E3\u6790\u7684\u76F8\u5173 API\uFF0C\u5305\u62EC JsonPaser \u548C JsonGenerator\u3002</li><li>jackson-annotations\uFF0C\u6CE8\u89E3\u5305\uFF0C\u63D0\u4F9B\u6807\u51C6\u7684\u6CE8\u89E3\u529F\u80FD\uFF1B</li><li>jackson-databind \uFF0C\u6570\u636E\u7ED1\u5B9A\u5305\uFF0C\u63D0\u4F9B\u57FA\u4E8E\u201C\u5BF9\u8C61\u7ED1\u5B9A\u201D\u89E3\u6790\u7684\u76F8\u5173 API \uFF08 ObjectMapper \uFF09 \u548C\u57FA\u4E8E\u201C\u6811\u6A21\u578B\u201D\u89E3\u6790\u7684\u76F8\u5173 API \uFF08JsonNode\uFF09\u3002</li></ul><h3 id="_01\u3001\u5F15\u5165-jackson-\u4F9D\u8D56" tabindex="-1"><a class="header-anchor" href="#_01\u3001\u5F15\u5165-jackson-\u4F9D\u8D56" aria-hidden="true">#</a> 01\u3001\u5F15\u5165 Jackson \u4F9D\u8D56</h3><p>\u8981\u60F3\u4F7F\u7528 Jackson\uFF0C\u9700\u8981\u5728 pom.xml \u6587\u4EF6\u4E2D\u6DFB\u52A0 Jackson \u7684\u4F9D\u8D56\u3002</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
     &lt;groupId&gt;com.fasterxml.jackson.core&lt;/groupId&gt;
     &lt;artifactId&gt;jackson-databind&lt;/artifactId&gt;
     &lt;version&gt;2.10.1&lt;/version&gt;
diff --git a/dist/assets/java-basic-34.html.ff9af0e4.js b/dist/assets/java-basic-34.html.c0108ee7.js
similarity index 99%
rename from dist/assets/java-basic-34.html.ff9af0e4.js
rename to dist/assets/java-basic-34.html.c0108ee7.js
index 0d5d859f..dd799e74 100644
--- a/dist/assets/java-basic-34.html.ff9af0e4.js
+++ b/dist/assets/java-basic-34.html.c0108ee7.js
@@ -1,4 +1,4 @@
-import{_ as l}from"./plugin-vue_export-helper.21dcd24c.js";import{r as a,o as s,c as o,a as e,b as i,e as r,d as n}from"./app.a0271b9c.js";const d={},g=r(`<h1 id="java-34\u9053\u7CBE\u9009\u9AD8\u9891\u9762\u8BD5\u9898\u5FC5\u770B" tabindex="-1"><a class="header-anchor" href="#java-34\u9053\u7CBE\u9009\u9AD8\u9891\u9762\u8BD5\u9898\u5FC5\u770B" aria-hidden="true">#</a> Java\uFF1A34\u9053\u7CBE\u9009\u9AD8\u9891\u9762\u8BD5\u9898\u5FC5\u770B\u{1F44D}</h1><h2 id="_1-\u4ECB\u7ECD\u4E00\u4E0B-java-\u5427" tabindex="-1"><a class="header-anchor" href="#_1-\u4ECB\u7ECD\u4E00\u4E0B-java-\u5427" aria-hidden="true">#</a> 1.\u4ECB\u7ECD\u4E00\u4E0B java \u5427</h2><p>java \u662F\u4E00\u95E8<strong>\u5F00\u6E90\u7684\u8DE8\u5E73\u53F0\u7684\u9762\u5411\u5BF9\u8C61\u7684</strong>\u8BA1\u7B97\u673A\u8BED\u8A00.</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/baguwen/basic-34-01.png" alt=""></p><p>\u8DE8\u5E73\u53F0\u662F\u56E0\u4E3A java \u7684 class \u6587\u4EF6\u662F\u8FD0\u884C\u5728\u865A\u62DF\u673A\u4E0A\u7684,\u5176\u5B9E\u8DE8\u5E73\u53F0\u7684,\u800C<strong>\u865A\u62DF\u673A\u662F\u4E0D\u540C\u5E73\u53F0\u6709\u4E0D\u540C\u7248\u672C</strong>,\u6240\u4EE5\u8BF4 java \u662F\u8DE8\u5E73\u53F0\u7684.</p><p>\u9762\u5411\u5BF9\u8C61\u6709\u51E0\u4E2A\u7279\u70B9:</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/baguwen/basic-34-02.png" alt=""></p><ul><li>1.<strong>\u5C01\u88C5</strong><ul><li>\u4E24\u5C42\u542B\u4E49\uFF1A\u4E00\u5C42\u542B\u4E49\u662F\u628A\u5BF9\u8C61\u7684\u5C5E\u6027\u548C\u884C\u4E3A\u770B\u6210\u4E00\u4E2A\u5BC6\u4E0D\u53EF\u5206\u7684\u6574\u4F53\uFF0C\u5C06\u8FD9\u4E24\u8005&#39;\u5C01\u88C5&#39;\u5728\u4E00\u4E2A\u4E0D\u53EF\u5206\u5272\u7684<strong>\u72EC\u7ACB\u5355\u5143</strong>(\u5373\u5BF9\u8C61)\u4E2D</li><li>\u53E6\u4E00\u5C42\u542B\u4E49\u6307&#39;\u4FE1\u606F\u9690\u85CF\uFF0C\u628A\u4E0D\u9700\u8981\u8BA9\u5916\u754C\u77E5\u9053\u7684\u4FE1\u606F\u9690\u85CF\u8D77\u6765\uFF0C\u6709\u4E9B\u5BF9\u8C61\u7684\u5C5E\u6027\u53CA\u884C\u4E3A\u5141\u8BB8\u5916\u754C\u7528\u6237\u77E5\u9053\u6216\u4F7F\u7528\uFF0C\u4F46\u4E0D\u5141\u8BB8\u66F4\u6539\uFF0C\u800C\u53E6\u4E00\u4E9B\u5C5E\u6027\u6216\u884C\u4E3A\uFF0C\u5219\u4E0D\u5141\u8BB8\u5916\u754C\u77E5\u6653\uFF0C\u6216\u53EA\u5141\u8BB8\u4F7F\u7528\u5BF9\u8C61\u7684\u529F\u80FD\uFF0C\u800C\u5C3D\u53EF\u80FD<strong>\u9690\u85CF\u5BF9\u8C61\u7684\u529F\u80FD\u5B9E\u73B0\u7EC6\u8282</strong>\u3002</li></ul></li></ul><p><strong>\u4F18\u70B9</strong>:</p><blockquote><p>1.\u826F\u597D\u7684\u5C01\u88C5\u80FD\u591F<strong>\u51CF\u5C11\u8026\u5408</strong>\uFF0C\u7B26\u5408\u7A0B\u5E8F\u8BBE\u8BA1\u8FFD\u6C42&#39;\u9AD8\u5185\u805A\uFF0C\u4F4E\u8026\u5408&#39;\u3002<br> 2.<strong>\u7C7B\u5185\u90E8\u7684\u7ED3\u6784\u53EF\u4EE5\u81EA\u7531\u4FEE\u6539</strong>\u3002<br> 3.\u53EF\u4EE5\u5BF9\u6210\u5458\u53D8\u91CF\u8FDB\u884C\u66F4<strong>\u7CBE\u786E\u7684\u63A7\u5236</strong>\u3002<br> 4.<strong>\u9690\u85CF\u4FE1\u606F</strong>\u5B9E\u73B0\u7EC6\u8282\u3002<br></p></blockquote><ul><li>2.<strong>\u7EE7\u627F</strong><ul><li>\u7EE7\u627F\u5C31\u662F\u5B50\u7C7B\u7EE7\u627F\u7236\u7C7B\u7684\u7279\u5F81\u548C\u884C\u4E3A\uFF0C\u4F7F\u5F97\u5B50\u7C7B\u5BF9\u8C61\uFF08\u5B9E\u4F8B\uFF09\u5177\u6709\u7236\u7C7B\u7684\u5B9E\u4F8B\u57DF\u548C\u65B9\u6CD5\uFF0C\u6216\u5B50\u7C7B\u4ECE\u7236\u7C7B\u7EE7\u627F\u65B9\u6CD5\uFF0C\u4F7F\u5F97\u5B50\u7C7B\u5177\u6709\u7236\u7C7B\u76F8\u540C\u7684\u884C\u4E3A\u3002</li></ul></li></ul><p><strong>\u4F18\u70B9</strong>:</p><blockquote><p>1.\u63D0\u9AD8\u7C7B\u4EE3\u7801\u7684<strong>\u590D\u7528\u6027</strong><br> 2.\u63D0\u9AD8\u4E86\u4EE3\u7801\u7684<strong>\u7EF4\u62A4\u6027</strong><br></p></blockquote><ul><li>3.<strong>\u591A\u6001</strong><ul><li>\u591A\u6001\u662F\u540C\u4E00\u4E2A\u884C\u4E3A\u5177\u6709\u591A\u4E2A\u4E0D\u540C\u8868\u73B0\u5F62\u5F0F\u6216\u5F62\u6001\u7684\u80FD\u529B\u3002Java\u8BED\u8A00\u4E2D\u542B\u6709\u65B9\u6CD5\u91CD\u8F7D\u4E0E\u5BF9\u8C61\u591A\u6001\u4E24\u79CD\u5F62\u5F0F\u7684\u591A\u6001\uFF1A <ul><li>1.<strong>\u65B9\u6CD5\u91CD\u8F7D</strong>\uFF1A\u5728\u4E00\u4E2A\u7C7B\u4E2D\uFF0C\u5141\u8BB8\u591A\u4E2A\u65B9\u6CD5\u4F7F\u7528\u540C\u4E00\u4E2A\u540D\u5B57\uFF0C\u4F46\u65B9\u6CD5\u7684\u53C2\u6570\u4E0D\u540C\uFF0C\u5B8C\u6210\u7684\u529F\u80FD\u4E5F\u4E0D\u540C\u3002</li><li>2.<strong>\u5BF9\u8C61\u591A\u6001</strong>\uFF1A\u5B50\u7C7B\u5BF9\u8C61\u53EF\u4EE5\u4E0E\u7236\u7C7B\u5BF9\u8C61\u8FDB\u884C\u8F6C\u6362\uFF0C\u800C\u4E14\u6839\u636E\u5176\u4F7F\u7528\u7684\u5B50\u7C7B\u4E0D\u540C\u5B8C\u6210\u7684\u529F\u80FD\u4E5F\u4E0D\u540C\uFF08\u91CD\u5199\u7236\u7C7B\u7684\u65B9\u6CD5\uFF09\u3002</li></ul></li></ul></li></ul><p><strong>\u4F18\u70B9</strong></p><blockquote><ol><li><strong>\u6D88\u9664\u7C7B\u578B\u4E4B\u95F4\u7684\u8026\u5408\u5173\u7CFB</strong><br></li><li><strong>\u53EF\u66FF\u6362\u6027</strong><br></li><li><strong>\u53EF\u6269\u5145\u6027</strong><br></li><li><strong>\u63A5\u53E3\u6027</strong><br></li><li><strong>\u7075\u6D3B\u6027</strong><br></li><li><strong>\u7B80\u5316\u6027</strong><br></li></ol></blockquote><h2 id="_2-java-\u6709\u54EA\u4E9B\u6570\u636E\u7C7B\u578B" tabindex="-1"><a class="header-anchor" href="#_2-java-\u6709\u54EA\u4E9B\u6570\u636E\u7C7B\u578B" aria-hidden="true">#</a> 2.java \u6709\u54EA\u4E9B\u6570\u636E\u7C7B\u578B\uFF1F</h2><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/baguwen/basic-34-03.png" alt=""></p><p>java \u4E3B\u8981\u6709\u4E24\u79CD\u6570\u636E\u7C7B\u578B</p><ul><li>1.<strong>\u57FA\u672C\u6570\u636E\u7C7B\u578B</strong><ul><li>\u57FA\u672C\u6570\u636E\u6709<strong>\u516B\u4E2A</strong>, <ul><li>byte,short,int,long\u5C5E\u4E8E\u6570\u503C\u578B\u4E2D\u7684\u6574\u6570\u578B</li><li>float,double\u5C5E\u4E8E\u6570\u503C\u578B\u4E2D\u7684\u6D6E\u70B9\u578B</li><li>char\u5C5E\u4E8E\u5B57\u7B26\u578B</li><li>boolean\u5C5E\u4E8E\u5E03\u5C14\u578B</li></ul></li></ul></li><li>2.<strong>\u5F15\u7528\u6570\u636E\u7C7B\u578B</strong><ul><li>\u5F15\u7528\u6570\u636E\u7C7B\u578B\u6709<strong>\u4E09\u4E2A</strong>,\u5206\u522B\u662F\u7C7B,\u63A5\u53E3\u548C\u6570\u7EC4</li></ul></li></ul><h2 id="_3-\u63A5\u53E3\u548C\u62BD\u8C61\u7C7B\u6709\u4EC0\u4E48\u533A\u522B" tabindex="-1"><a class="header-anchor" href="#_3-\u63A5\u53E3\u548C\u62BD\u8C61\u7C7B\u6709\u4EC0\u4E48\u533A\u522B" aria-hidden="true">#</a> 3.\u63A5\u53E3\u548C\u62BD\u8C61\u7C7B\u6709\u4EC0\u4E48\u533A\u522B\uFF1F</h2><ul><li>1.\u63A5\u53E3\u662F\u62BD\u8C61\u7C7B\u7684\u53D8\u4F53\uFF0C<strong>\u63A5\u53E3\u4E2D\u6240\u6709\u7684\u65B9\u6CD5\u90FD\u662F\u62BD\u8C61\u7684</strong>\u3002\u800C\u62BD\u8C61\u7C7B\u662F\u58F0\u660E\u65B9\u6CD5\u7684\u5B58\u5728\u800C\u4E0D\u53BB\u5B9E\u73B0\u5B83\u7684\u7C7B\u3002</li><li>2.\u63A5\u53E3\u53EF\u4EE5\u591A\u7EE7\u627F\uFF0C\u62BD\u8C61\u7C7B\u4E0D\u884C\u3002</li><li>3.\u63A5\u53E3\u5B9A\u4E49\u65B9\u6CD5\uFF0C\u4E0D\u80FD\u5B9E\u73B0\uFF0C\u9ED8\u8BA4\u662F <strong>public abstract</strong>\uFF0C\u800C\u62BD\u8C61\u7C7B\u53EF\u4EE5\u5B9E\u73B0\u90E8\u5206\u65B9\u6CD5\u3002</li><li>4.\u63A5\u53E3\u4E2D\u57FA\u672C\u6570\u636E\u7C7B\u578B\u4E3A <strong>public static final</strong> \u5E76\u4E14\u9700\u8981\u7ED9\u51FA\u521D\u59CB\u503C\uFF0C\u800C\u62BD\u7C7B\u8C61\u4E0D\u662F\u7684\u3002</li></ul><h2 id="_4-\u91CD\u8F7D\u548C\u91CD\u5199\u4EC0\u4E48\u533A\u522B" tabindex="-1"><a class="header-anchor" href="#_4-\u91CD\u8F7D\u548C\u91CD\u5199\u4EC0\u4E48\u533A\u522B" aria-hidden="true">#</a> 4.\u91CD\u8F7D\u548C\u91CD\u5199\u4EC0\u4E48\u533A\u522B\uFF1F</h2><p>\u91CD\u5199\uFF1A</p><ul><li>1.\u53C2\u6570\u5217\u8868\u5FC5\u987B<strong>\u5B8C\u5168\u4E0E\u88AB\u91CD\u5199\u7684\u65B9\u6CD5</strong>\u76F8\u540C\uFF0C\u5426\u5219\u4E0D\u80FD\u79F0\u5176\u4E3A\u91CD\u5199\u800C\u662F\u91CD\u8F7D.</li><li>2.<strong>\u8FD4\u56DE\u7684\u7C7B\u578B\u5FC5\u987B\u4E00\u76F4\u4E0E\u88AB\u91CD\u5199\u7684\u65B9\u6CD5\u7684\u8FD4\u56DE\u7C7B\u578B\u76F8\u540C</strong>\uFF0C\u5426\u5219\u4E0D\u80FD\u79F0\u5176\u4E3A\u91CD\u5199\u800C\u662F\u91CD\u8F7D\u3002</li><li>3.\u8BBF\u95EE<strong>\u4FEE\u9970\u7B26\u7684\u9650\u5236\u4E00\u5B9A\u8981\u5927\u4E8E\u88AB\u91CD\u5199\u65B9\u6CD5\u7684\u8BBF\u95EE\u4FEE\u9970\u7B26</strong></li><li>4.\u91CD\u5199\u65B9\u6CD5\u4E00\u5B9A<strong>\u4E0D\u80FD\u629B\u51FA\u65B0\u7684\u68C0\u67E5\u5F02\u5E38\u6216\u8005\u6BD4\u88AB\u91CD\u5199\u65B9\u6CD5\u7533\u660E\u66F4\u52A0\u5BBD\u6CDB\u7684\u68C0\u67E5\u578B\u5F02\u5E38</strong>\u3002</li></ul><p>\u91CD\u8F7D\uFF1A</p><ul><li>1.\u5FC5\u987B\u5177\u6709<strong>\u4E0D\u540C\u7684\u53C2\u6570\u5217\u8868</strong>\uFF1B</li><li>2.\u53EF\u4EE5\u6709\u4E0D\u540C\u7684\u8FD4\u56DE\u7C7B\u578B\uFF0C\u53EA\u8981\u53C2\u6570\u5217\u8868\u4E0D\u540C\u5C31\u53EF\u4EE5\u4E86\uFF1B</li><li>3.\u53EF\u4EE5\u6709<strong>\u4E0D\u540C\u7684\u8BBF\u95EE\u4FEE\u9970\u7B26</strong>\uFF1B</li><li>4.\u53EF\u4EE5\u629B\u51FA<strong>\u4E0D\u540C\u7684\u5F02\u5E38</strong>\uFF1B</li></ul><h2 id="_5-\u5E38\u89C1\u7684\u5F02\u5E38\u6709\u54EA\u4E9B" tabindex="-1"><a class="header-anchor" href="#_5-\u5E38\u89C1\u7684\u5F02\u5E38\u6709\u54EA\u4E9B" aria-hidden="true">#</a> 5.\u5E38\u89C1\u7684\u5F02\u5E38\u6709\u54EA\u4E9B\uFF1F</h2><ul><li>NullPointerException \u7A7A\u6307\u9488\u5F02\u5E38</li><li>ArrayIndexOutOfBoundsException \u7D22\u5F15\u8D8A\u754C\u5F02\u5E38</li><li>InputFormatException \u8F93\u5165\u7C7B\u578B\u4E0D\u5339\u914D</li><li>SQLException SQL\u5F02\u5E38</li><li>IllegalArgumentException \u975E\u6CD5\u53C2\u6570</li><li>NumberFormatException \u7C7B\u578B\u8F6C\u6362\u5F02\u5E38 \u7B49\u7B49....</li></ul><h2 id="_6-\u5F02\u5E38\u8981\u600E\u4E48\u89E3\u51B3" tabindex="-1"><a class="header-anchor" href="#_6-\u5F02\u5E38\u8981\u600E\u4E48\u89E3\u51B3" aria-hidden="true">#</a> 6.\u5F02\u5E38\u8981\u600E\u4E48\u89E3\u51B3\uFF1F</h2><p>Java\u6807\u51C6\u5E93\u5185\u5EFA\u4E86\u4E00\u4E9B\u901A\u7528\u7684\u5F02\u5E38\uFF0C\u8FD9\u4E9B\u7C7B\u4EE5Throwable\u4E3A\u9876\u5C42\u7236\u7C7B\u3002</p><p>Throwable\u53C8\u6D3E\u751F\u51FA<strong>Error\u7C7B\u548CException\u7C7B</strong>\u3002</p><p>\u9519\u8BEF\uFF1AError\u7C7B\u4EE5\u53CA\u4ED6\u7684\u5B50\u7C7B\u7684\u5B9E\u4F8B\uFF0C\u4EE3\u8868\u4E86JVM\u672C\u8EAB\u7684\u9519\u8BEF\u3002\u9519\u8BEF\u4E0D\u80FD\u88AB\u7A0B\u5E8F\u5458\u901A\u8FC7\u4EE3\u7801\u5904\u7406\uFF0CError\u5F88\u5C11\u51FA\u73B0\u3002\u56E0\u6B64\uFF0C\u7A0B\u5E8F\u5458\u5E94\u8BE5\u5173\u6CE8Exception\u4E3A\u7236\u7C7B\u7684\u5206\u652F\u4E0B\u7684\u5404\u79CD\u5F02\u5E38\u7C7B\u3002</p><p>\u5F02\u5E38\uFF1AException\u4EE5\u53CA\u4ED6\u7684\u5B50\u7C7B\uFF0C\u4EE3\u8868\u7A0B\u5E8F\u8FD0\u884C\u65F6\u53D1\u9001\u7684\u5404\u79CD\u4E0D\u671F\u671B\u53D1\u751F\u7684\u4E8B\u4EF6\u3002\u53EF\u4EE5\u88ABJava\u5F02\u5E38\u5904\u7406\u673A\u5236\u4F7F\u7528\uFF0C\u662F\u5F02\u5E38\u5904\u7406\u7684\u6838\u5FC3\u3002</p><p>\u5904\u7406\u65B9\u6CD5:</p><ul><li>1.<strong>try()catch(){}</strong></li></ul><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>try{
+import{_ as l}from"./plugin-vue_export-helper.21dcd24c.js";import{r as a,o as s,c as o,a as e,b as i,e as r,d as n}from"./app.615e41d8.js";const d={},g=r(`<h1 id="java-34\u9053\u7CBE\u9009\u9AD8\u9891\u9762\u8BD5\u9898\u5FC5\u770B" tabindex="-1"><a class="header-anchor" href="#java-34\u9053\u7CBE\u9009\u9AD8\u9891\u9762\u8BD5\u9898\u5FC5\u770B" aria-hidden="true">#</a> Java\uFF1A34\u9053\u7CBE\u9009\u9AD8\u9891\u9762\u8BD5\u9898\u5FC5\u770B\u{1F44D}</h1><h2 id="_1-\u4ECB\u7ECD\u4E00\u4E0B-java-\u5427" tabindex="-1"><a class="header-anchor" href="#_1-\u4ECB\u7ECD\u4E00\u4E0B-java-\u5427" aria-hidden="true">#</a> 1.\u4ECB\u7ECD\u4E00\u4E0B java \u5427</h2><p>java \u662F\u4E00\u95E8<strong>\u5F00\u6E90\u7684\u8DE8\u5E73\u53F0\u7684\u9762\u5411\u5BF9\u8C61\u7684</strong>\u8BA1\u7B97\u673A\u8BED\u8A00.</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/baguwen/basic-34-01.png" alt=""></p><p>\u8DE8\u5E73\u53F0\u662F\u56E0\u4E3A java \u7684 class \u6587\u4EF6\u662F\u8FD0\u884C\u5728\u865A\u62DF\u673A\u4E0A\u7684,\u5176\u5B9E\u8DE8\u5E73\u53F0\u7684,\u800C<strong>\u865A\u62DF\u673A\u662F\u4E0D\u540C\u5E73\u53F0\u6709\u4E0D\u540C\u7248\u672C</strong>,\u6240\u4EE5\u8BF4 java \u662F\u8DE8\u5E73\u53F0\u7684.</p><p>\u9762\u5411\u5BF9\u8C61\u6709\u51E0\u4E2A\u7279\u70B9:</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/baguwen/basic-34-02.png" alt=""></p><ul><li>1.<strong>\u5C01\u88C5</strong><ul><li>\u4E24\u5C42\u542B\u4E49\uFF1A\u4E00\u5C42\u542B\u4E49\u662F\u628A\u5BF9\u8C61\u7684\u5C5E\u6027\u548C\u884C\u4E3A\u770B\u6210\u4E00\u4E2A\u5BC6\u4E0D\u53EF\u5206\u7684\u6574\u4F53\uFF0C\u5C06\u8FD9\u4E24\u8005&#39;\u5C01\u88C5&#39;\u5728\u4E00\u4E2A\u4E0D\u53EF\u5206\u5272\u7684<strong>\u72EC\u7ACB\u5355\u5143</strong>(\u5373\u5BF9\u8C61)\u4E2D</li><li>\u53E6\u4E00\u5C42\u542B\u4E49\u6307&#39;\u4FE1\u606F\u9690\u85CF\uFF0C\u628A\u4E0D\u9700\u8981\u8BA9\u5916\u754C\u77E5\u9053\u7684\u4FE1\u606F\u9690\u85CF\u8D77\u6765\uFF0C\u6709\u4E9B\u5BF9\u8C61\u7684\u5C5E\u6027\u53CA\u884C\u4E3A\u5141\u8BB8\u5916\u754C\u7528\u6237\u77E5\u9053\u6216\u4F7F\u7528\uFF0C\u4F46\u4E0D\u5141\u8BB8\u66F4\u6539\uFF0C\u800C\u53E6\u4E00\u4E9B\u5C5E\u6027\u6216\u884C\u4E3A\uFF0C\u5219\u4E0D\u5141\u8BB8\u5916\u754C\u77E5\u6653\uFF0C\u6216\u53EA\u5141\u8BB8\u4F7F\u7528\u5BF9\u8C61\u7684\u529F\u80FD\uFF0C\u800C\u5C3D\u53EF\u80FD<strong>\u9690\u85CF\u5BF9\u8C61\u7684\u529F\u80FD\u5B9E\u73B0\u7EC6\u8282</strong>\u3002</li></ul></li></ul><p><strong>\u4F18\u70B9</strong>:</p><blockquote><p>1.\u826F\u597D\u7684\u5C01\u88C5\u80FD\u591F<strong>\u51CF\u5C11\u8026\u5408</strong>\uFF0C\u7B26\u5408\u7A0B\u5E8F\u8BBE\u8BA1\u8FFD\u6C42&#39;\u9AD8\u5185\u805A\uFF0C\u4F4E\u8026\u5408&#39;\u3002<br> 2.<strong>\u7C7B\u5185\u90E8\u7684\u7ED3\u6784\u53EF\u4EE5\u81EA\u7531\u4FEE\u6539</strong>\u3002<br> 3.\u53EF\u4EE5\u5BF9\u6210\u5458\u53D8\u91CF\u8FDB\u884C\u66F4<strong>\u7CBE\u786E\u7684\u63A7\u5236</strong>\u3002<br> 4.<strong>\u9690\u85CF\u4FE1\u606F</strong>\u5B9E\u73B0\u7EC6\u8282\u3002<br></p></blockquote><ul><li>2.<strong>\u7EE7\u627F</strong><ul><li>\u7EE7\u627F\u5C31\u662F\u5B50\u7C7B\u7EE7\u627F\u7236\u7C7B\u7684\u7279\u5F81\u548C\u884C\u4E3A\uFF0C\u4F7F\u5F97\u5B50\u7C7B\u5BF9\u8C61\uFF08\u5B9E\u4F8B\uFF09\u5177\u6709\u7236\u7C7B\u7684\u5B9E\u4F8B\u57DF\u548C\u65B9\u6CD5\uFF0C\u6216\u5B50\u7C7B\u4ECE\u7236\u7C7B\u7EE7\u627F\u65B9\u6CD5\uFF0C\u4F7F\u5F97\u5B50\u7C7B\u5177\u6709\u7236\u7C7B\u76F8\u540C\u7684\u884C\u4E3A\u3002</li></ul></li></ul><p><strong>\u4F18\u70B9</strong>:</p><blockquote><p>1.\u63D0\u9AD8\u7C7B\u4EE3\u7801\u7684<strong>\u590D\u7528\u6027</strong><br> 2.\u63D0\u9AD8\u4E86\u4EE3\u7801\u7684<strong>\u7EF4\u62A4\u6027</strong><br></p></blockquote><ul><li>3.<strong>\u591A\u6001</strong><ul><li>\u591A\u6001\u662F\u540C\u4E00\u4E2A\u884C\u4E3A\u5177\u6709\u591A\u4E2A\u4E0D\u540C\u8868\u73B0\u5F62\u5F0F\u6216\u5F62\u6001\u7684\u80FD\u529B\u3002Java\u8BED\u8A00\u4E2D\u542B\u6709\u65B9\u6CD5\u91CD\u8F7D\u4E0E\u5BF9\u8C61\u591A\u6001\u4E24\u79CD\u5F62\u5F0F\u7684\u591A\u6001\uFF1A <ul><li>1.<strong>\u65B9\u6CD5\u91CD\u8F7D</strong>\uFF1A\u5728\u4E00\u4E2A\u7C7B\u4E2D\uFF0C\u5141\u8BB8\u591A\u4E2A\u65B9\u6CD5\u4F7F\u7528\u540C\u4E00\u4E2A\u540D\u5B57\uFF0C\u4F46\u65B9\u6CD5\u7684\u53C2\u6570\u4E0D\u540C\uFF0C\u5B8C\u6210\u7684\u529F\u80FD\u4E5F\u4E0D\u540C\u3002</li><li>2.<strong>\u5BF9\u8C61\u591A\u6001</strong>\uFF1A\u5B50\u7C7B\u5BF9\u8C61\u53EF\u4EE5\u4E0E\u7236\u7C7B\u5BF9\u8C61\u8FDB\u884C\u8F6C\u6362\uFF0C\u800C\u4E14\u6839\u636E\u5176\u4F7F\u7528\u7684\u5B50\u7C7B\u4E0D\u540C\u5B8C\u6210\u7684\u529F\u80FD\u4E5F\u4E0D\u540C\uFF08\u91CD\u5199\u7236\u7C7B\u7684\u65B9\u6CD5\uFF09\u3002</li></ul></li></ul></li></ul><p><strong>\u4F18\u70B9</strong></p><blockquote><ol><li><strong>\u6D88\u9664\u7C7B\u578B\u4E4B\u95F4\u7684\u8026\u5408\u5173\u7CFB</strong><br></li><li><strong>\u53EF\u66FF\u6362\u6027</strong><br></li><li><strong>\u53EF\u6269\u5145\u6027</strong><br></li><li><strong>\u63A5\u53E3\u6027</strong><br></li><li><strong>\u7075\u6D3B\u6027</strong><br></li><li><strong>\u7B80\u5316\u6027</strong><br></li></ol></blockquote><h2 id="_2-java-\u6709\u54EA\u4E9B\u6570\u636E\u7C7B\u578B" tabindex="-1"><a class="header-anchor" href="#_2-java-\u6709\u54EA\u4E9B\u6570\u636E\u7C7B\u578B" aria-hidden="true">#</a> 2.java \u6709\u54EA\u4E9B\u6570\u636E\u7C7B\u578B\uFF1F</h2><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/baguwen/basic-34-03.png" alt=""></p><p>java \u4E3B\u8981\u6709\u4E24\u79CD\u6570\u636E\u7C7B\u578B</p><ul><li>1.<strong>\u57FA\u672C\u6570\u636E\u7C7B\u578B</strong><ul><li>\u57FA\u672C\u6570\u636E\u6709<strong>\u516B\u4E2A</strong>, <ul><li>byte,short,int,long\u5C5E\u4E8E\u6570\u503C\u578B\u4E2D\u7684\u6574\u6570\u578B</li><li>float,double\u5C5E\u4E8E\u6570\u503C\u578B\u4E2D\u7684\u6D6E\u70B9\u578B</li><li>char\u5C5E\u4E8E\u5B57\u7B26\u578B</li><li>boolean\u5C5E\u4E8E\u5E03\u5C14\u578B</li></ul></li></ul></li><li>2.<strong>\u5F15\u7528\u6570\u636E\u7C7B\u578B</strong><ul><li>\u5F15\u7528\u6570\u636E\u7C7B\u578B\u6709<strong>\u4E09\u4E2A</strong>,\u5206\u522B\u662F\u7C7B,\u63A5\u53E3\u548C\u6570\u7EC4</li></ul></li></ul><h2 id="_3-\u63A5\u53E3\u548C\u62BD\u8C61\u7C7B\u6709\u4EC0\u4E48\u533A\u522B" tabindex="-1"><a class="header-anchor" href="#_3-\u63A5\u53E3\u548C\u62BD\u8C61\u7C7B\u6709\u4EC0\u4E48\u533A\u522B" aria-hidden="true">#</a> 3.\u63A5\u53E3\u548C\u62BD\u8C61\u7C7B\u6709\u4EC0\u4E48\u533A\u522B\uFF1F</h2><ul><li>1.\u63A5\u53E3\u662F\u62BD\u8C61\u7C7B\u7684\u53D8\u4F53\uFF0C<strong>\u63A5\u53E3\u4E2D\u6240\u6709\u7684\u65B9\u6CD5\u90FD\u662F\u62BD\u8C61\u7684</strong>\u3002\u800C\u62BD\u8C61\u7C7B\u662F\u58F0\u660E\u65B9\u6CD5\u7684\u5B58\u5728\u800C\u4E0D\u53BB\u5B9E\u73B0\u5B83\u7684\u7C7B\u3002</li><li>2.\u63A5\u53E3\u53EF\u4EE5\u591A\u7EE7\u627F\uFF0C\u62BD\u8C61\u7C7B\u4E0D\u884C\u3002</li><li>3.\u63A5\u53E3\u5B9A\u4E49\u65B9\u6CD5\uFF0C\u4E0D\u80FD\u5B9E\u73B0\uFF0C\u9ED8\u8BA4\u662F <strong>public abstract</strong>\uFF0C\u800C\u62BD\u8C61\u7C7B\u53EF\u4EE5\u5B9E\u73B0\u90E8\u5206\u65B9\u6CD5\u3002</li><li>4.\u63A5\u53E3\u4E2D\u57FA\u672C\u6570\u636E\u7C7B\u578B\u4E3A <strong>public static final</strong> \u5E76\u4E14\u9700\u8981\u7ED9\u51FA\u521D\u59CB\u503C\uFF0C\u800C\u62BD\u7C7B\u8C61\u4E0D\u662F\u7684\u3002</li></ul><h2 id="_4-\u91CD\u8F7D\u548C\u91CD\u5199\u4EC0\u4E48\u533A\u522B" tabindex="-1"><a class="header-anchor" href="#_4-\u91CD\u8F7D\u548C\u91CD\u5199\u4EC0\u4E48\u533A\u522B" aria-hidden="true">#</a> 4.\u91CD\u8F7D\u548C\u91CD\u5199\u4EC0\u4E48\u533A\u522B\uFF1F</h2><p>\u91CD\u5199\uFF1A</p><ul><li>1.\u53C2\u6570\u5217\u8868\u5FC5\u987B<strong>\u5B8C\u5168\u4E0E\u88AB\u91CD\u5199\u7684\u65B9\u6CD5</strong>\u76F8\u540C\uFF0C\u5426\u5219\u4E0D\u80FD\u79F0\u5176\u4E3A\u91CD\u5199\u800C\u662F\u91CD\u8F7D.</li><li>2.<strong>\u8FD4\u56DE\u7684\u7C7B\u578B\u5FC5\u987B\u4E00\u76F4\u4E0E\u88AB\u91CD\u5199\u7684\u65B9\u6CD5\u7684\u8FD4\u56DE\u7C7B\u578B\u76F8\u540C</strong>\uFF0C\u5426\u5219\u4E0D\u80FD\u79F0\u5176\u4E3A\u91CD\u5199\u800C\u662F\u91CD\u8F7D\u3002</li><li>3.\u8BBF\u95EE<strong>\u4FEE\u9970\u7B26\u7684\u9650\u5236\u4E00\u5B9A\u8981\u5927\u4E8E\u88AB\u91CD\u5199\u65B9\u6CD5\u7684\u8BBF\u95EE\u4FEE\u9970\u7B26</strong></li><li>4.\u91CD\u5199\u65B9\u6CD5\u4E00\u5B9A<strong>\u4E0D\u80FD\u629B\u51FA\u65B0\u7684\u68C0\u67E5\u5F02\u5E38\u6216\u8005\u6BD4\u88AB\u91CD\u5199\u65B9\u6CD5\u7533\u660E\u66F4\u52A0\u5BBD\u6CDB\u7684\u68C0\u67E5\u578B\u5F02\u5E38</strong>\u3002</li></ul><p>\u91CD\u8F7D\uFF1A</p><ul><li>1.\u5FC5\u987B\u5177\u6709<strong>\u4E0D\u540C\u7684\u53C2\u6570\u5217\u8868</strong>\uFF1B</li><li>2.\u53EF\u4EE5\u6709\u4E0D\u540C\u7684\u8FD4\u56DE\u7C7B\u578B\uFF0C\u53EA\u8981\u53C2\u6570\u5217\u8868\u4E0D\u540C\u5C31\u53EF\u4EE5\u4E86\uFF1B</li><li>3.\u53EF\u4EE5\u6709<strong>\u4E0D\u540C\u7684\u8BBF\u95EE\u4FEE\u9970\u7B26</strong>\uFF1B</li><li>4.\u53EF\u4EE5\u629B\u51FA<strong>\u4E0D\u540C\u7684\u5F02\u5E38</strong>\uFF1B</li></ul><h2 id="_5-\u5E38\u89C1\u7684\u5F02\u5E38\u6709\u54EA\u4E9B" tabindex="-1"><a class="header-anchor" href="#_5-\u5E38\u89C1\u7684\u5F02\u5E38\u6709\u54EA\u4E9B" aria-hidden="true">#</a> 5.\u5E38\u89C1\u7684\u5F02\u5E38\u6709\u54EA\u4E9B\uFF1F</h2><ul><li>NullPointerException \u7A7A\u6307\u9488\u5F02\u5E38</li><li>ArrayIndexOutOfBoundsException \u7D22\u5F15\u8D8A\u754C\u5F02\u5E38</li><li>InputFormatException \u8F93\u5165\u7C7B\u578B\u4E0D\u5339\u914D</li><li>SQLException SQL\u5F02\u5E38</li><li>IllegalArgumentException \u975E\u6CD5\u53C2\u6570</li><li>NumberFormatException \u7C7B\u578B\u8F6C\u6362\u5F02\u5E38 \u7B49\u7B49....</li></ul><h2 id="_6-\u5F02\u5E38\u8981\u600E\u4E48\u89E3\u51B3" tabindex="-1"><a class="header-anchor" href="#_6-\u5F02\u5E38\u8981\u600E\u4E48\u89E3\u51B3" aria-hidden="true">#</a> 6.\u5F02\u5E38\u8981\u600E\u4E48\u89E3\u51B3\uFF1F</h2><p>Java\u6807\u51C6\u5E93\u5185\u5EFA\u4E86\u4E00\u4E9B\u901A\u7528\u7684\u5F02\u5E38\uFF0C\u8FD9\u4E9B\u7C7B\u4EE5Throwable\u4E3A\u9876\u5C42\u7236\u7C7B\u3002</p><p>Throwable\u53C8\u6D3E\u751F\u51FA<strong>Error\u7C7B\u548CException\u7C7B</strong>\u3002</p><p>\u9519\u8BEF\uFF1AError\u7C7B\u4EE5\u53CA\u4ED6\u7684\u5B50\u7C7B\u7684\u5B9E\u4F8B\uFF0C\u4EE3\u8868\u4E86JVM\u672C\u8EAB\u7684\u9519\u8BEF\u3002\u9519\u8BEF\u4E0D\u80FD\u88AB\u7A0B\u5E8F\u5458\u901A\u8FC7\u4EE3\u7801\u5904\u7406\uFF0CError\u5F88\u5C11\u51FA\u73B0\u3002\u56E0\u6B64\uFF0C\u7A0B\u5E8F\u5458\u5E94\u8BE5\u5173\u6CE8Exception\u4E3A\u7236\u7C7B\u7684\u5206\u652F\u4E0B\u7684\u5404\u79CD\u5F02\u5E38\u7C7B\u3002</p><p>\u5F02\u5E38\uFF1AException\u4EE5\u53CA\u4ED6\u7684\u5B50\u7C7B\uFF0C\u4EE3\u8868\u7A0B\u5E8F\u8FD0\u884C\u65F6\u53D1\u9001\u7684\u5404\u79CD\u4E0D\u671F\u671B\u53D1\u751F\u7684\u4E8B\u4EF6\u3002\u53EF\u4EE5\u88ABJava\u5F02\u5E38\u5904\u7406\u673A\u5236\u4F7F\u7528\uFF0C\u662F\u5F02\u5E38\u5904\u7406\u7684\u6838\u5FC3\u3002</p><p>\u5904\u7406\u65B9\u6CD5:</p><ul><li>1.<strong>try()catch(){}</strong></li></ul><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>try{
 // \u7A0B\u5E8F\u4EE3\u7801
 }catch(ExceptionName e1){
 //Catch \u5757
diff --git a/dist/assets/java-basic.html.0b10b00c.js b/dist/assets/java-basic.html.34b72317.js
similarity index 99%
rename from dist/assets/java-basic.html.0b10b00c.js
rename to dist/assets/java-basic.html.34b72317.js
index 89166648..79851c58 100644
--- a/dist/assets/java-basic.html.0b10b00c.js
+++ b/dist/assets/java-basic.html.34b72317.js
@@ -1,4 +1,4 @@
-import{_ as l}from"./plugin-vue_export-helper.21dcd24c.js";import{r as n,o as s,c as r,a,b as t,e as h,d as e}from"./app.a0271b9c.js";const d={},p=h(`<h1 id="java-\u57FA\u7840\u516B\u80A1\u6587-\u80CC\u8BF5\u7248-\u5FC5\u770B" tabindex="-1"><a class="header-anchor" href="#java-\u57FA\u7840\u516B\u80A1\u6587-\u80CC\u8BF5\u7248-\u5FC5\u770B" aria-hidden="true">#</a> Java \u57FA\u7840\u516B\u80A1\u6587\uFF08\u80CC\u8BF5\u7248\uFF09\u5FC5\u770B\u{1F44D}</h1><h3 id="java-\u8BED\u8A00\u5177\u6709\u54EA\u4E9B\u7279\u70B9" tabindex="-1"><a class="header-anchor" href="#java-\u8BED\u8A00\u5177\u6709\u54EA\u4E9B\u7279\u70B9" aria-hidden="true">#</a> Java \u8BED\u8A00\u5177\u6709\u54EA\u4E9B\u7279\u70B9\uFF1F</h3><ul><li>Java \u4E3A\u7EAF\u9762\u5411\u5BF9\u8C61\u7684\u8BED\u8A00\u3002\u5B83\u80FD\u591F\u76F4\u63A5\u53CD\u5E94\u73B0\u5B9E\u751F\u6D3B\u4E2D\u7684\u5BF9\u8C61\u3002</li><li>\u5177\u6709\u5E73\u53F0\u65E0\u5173\u6027\u3002Java \u5229\u7528 Java \u865A\u62DF\u673A\u8FD0\u884C\u5B57\u8282\u7801\uFF0C\u65E0\u8BBA\u662F\u5728 Windows\u3001Linux \u8FD8\u662F MacOS \u7B49\u5176\u5B83\u5E73\u53F0\u5BF9 Java \u7A0B\u5E8F\u8FDB\u884C\u7F16\u8BD1\uFF0C\u7F16\u8BD1\u540E\u7684\u7A0B\u5E8F\u53EF\u5728\u5176\u5B83\u5E73\u53F0\u8FD0\u884C\u3002</li><li>Java \u4E3A\u89E3\u91CA\u578B\u8BED\u8A00\uFF0C\u7F16\u8BD1\u5668\u628A Java \u4EE3\u7801\u7F16\u8BD1\u6210\u5E73\u53F0\u65E0\u5173\u7684\u4E2D\u95F4\u4EE3\u7801\uFF0C\u7136\u540E\u5728 JVM \u4E0A\u89E3\u91CA\u8FD0\u884C\uFF0C\u5177\u6709\u5F88\u597D\u7684\u53EF\u79FB\u690D\u6027\u3002</li><li>Java \u63D0\u4F9B\u4E86\u5F88\u591A\u5185\u7F6E\u7C7B\u5E93\u3002\u5982\u5BF9\u591A\u7EBF\u7A0B\u652F\u6301\uFF0C\u5BF9\u7F51\u7EDC\u901A\u4FE1\u652F\u6301\uFF0C\u6700\u91CD\u8981\u7684\u4E00\u70B9\u662F\u63D0\u4F9B\u4E86\u5783\u573E\u56DE\u6536\u5668\u3002</li><li>Java \u5177\u6709\u8F83\u597D\u7684\u5B89\u5168\u6027\u548C\u5065\u58EE\u6027\u3002Java \u63D0\u4F9B\u4E86\u5F02\u5E38\u5904\u7406\u548C\u5783\u573E\u56DE\u6536\u673A\u5236\uFF0C\u53BB\u9664\u4E86 C++\u4E2D\u96BE\u4EE5\u7406\u89E3\u7684\u6307\u9488\u7279\u6027\u3002</li></ul><h3 id="jdk-\u4E0E-jre-\u6709\u4EC0\u4E48\u533A\u522B" tabindex="-1"><a class="header-anchor" href="#jdk-\u4E0E-jre-\u6709\u4EC0\u4E48\u533A\u522B" aria-hidden="true">#</a> JDK \u4E0E JRE \u6709\u4EC0\u4E48\u533A\u522B\uFF1F</h3><ul><li>JDK\uFF1AJava \u5F00\u53D1\u5DE5\u5177\u5305\uFF08Java Development Kit\uFF09\uFF0C\u63D0\u4F9B\u4E86 Java \u7684\u5F00\u53D1\u73AF\u5883\u548C\u8FD0\u884C\u73AF\u5883\u3002</li><li>JRE\uFF1AJava \u8FD0\u884C\u73AF\u5883(Java Runtime Environment)\uFF0C\u63D0\u4F9B\u4E86 Java \u8FD0\u884C\u6240\u9700\u7684\u73AF\u5883\u3002</li><li>JDK \u5305\u542B\u4E86 JRE\u3002\u5982\u679C\u53EA\u8FD0\u884C Java \u7A0B\u5E8F\uFF0C\u5B89\u88C5 JRE \u5373\u53EF\u3002\u8981\u7F16\u5199 Java \u7A0B\u5E8F\u9700\u5B89\u88C5 JDK.</li></ul><h3 id="\u7B80\u8FF0-java-\u57FA\u672C\u6570\u636E\u7C7B\u578B" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0-java-\u57FA\u672C\u6570\u636E\u7C7B\u578B" aria-hidden="true">#</a> \u7B80\u8FF0 Java \u57FA\u672C\u6570\u636E\u7C7B\u578B</h3><ul><li>byte: \u5360\u7528 1 \u4E2A\u5B57\u8282\uFF0C\u53D6\u503C\u8303\u56F4-128 ~ 127</li><li>short: \u5360\u7528 2 \u4E2A\u5B57\u8282\uFF0C\u53D6\u503C\u8303\u56F4-2^15^ ~ 2^15^-1</li><li>int\uFF1A\u5360\u7528 4 \u4E2A\u5B57\u8282\uFF0C\u53D6\u503C\u8303\u56F4-2^31^ ~ 2^31^-1</li><li>long\uFF1A\u5360\u7528 8 \u4E2A\u5B57\u8282</li><li>float\uFF1A\u5360\u7528 4 \u4E2A\u5B57\u8282</li><li>double\uFF1A\u5360\u7528 8 \u4E2A\u5B57\u8282</li><li>char: \u5360\u7528 2 \u4E2A\u5B57\u8282</li><li>boolean\uFF1A\u5360\u7528\u5927\u5C0F\u6839\u636E\u5B9E\u73B0\u865A\u62DF\u673A\u4E0D\u540C\u6709\u6240\u5DEE\u5F02</li></ul><h3 id="\u7B80\u8FF0\u81EA\u52A8\u88C5\u7BB1\u62C6\u7BB1" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0\u81EA\u52A8\u88C5\u7BB1\u62C6\u7BB1" aria-hidden="true">#</a> \u7B80\u8FF0\u81EA\u52A8\u88C5\u7BB1\u62C6\u7BB1</h3><p>\u5BF9\u4E8E Java \u57FA\u672C\u6570\u636E\u7C7B\u578B\uFF0C\u5747\u5BF9\u5E94\u4E00\u4E2A\u5305\u88C5\u7C7B\u3002</p><p>\u88C5\u7BB1\u5C31\u662F\u81EA\u52A8\u5C06\u57FA\u672C\u6570\u636E\u7C7B\u578B\u8F6C\u6362\u4E3A\u5305\u88C5\u5668\u7C7B\u578B\uFF0C\u5982 int-&gt;Integer</p><p>\u62C6\u7BB1\u5C31\u662F\u81EA\u52A8\u5C06\u5305\u88C5\u5668\u7C7B\u578B\u8F6C\u6362\u4E3A\u57FA\u672C\u6570\u636E\u7C7B\u578B\uFF0C\u5982 Integer-&gt;int</p><h3 id="\u7B80\u8FF0-java-\u8BBF\u95EE\u4FEE\u9970\u7B26" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0-java-\u8BBF\u95EE\u4FEE\u9970\u7B26" aria-hidden="true">#</a> \u7B80\u8FF0 Java \u8BBF\u95EE\u4FEE\u9970\u7B26</h3><ul><li>default: \u9ED8\u8BA4\u8BBF\u95EE\u4FEE\u9970\u7B26\uFF0C\u5728\u540C\u4E00\u5305\u5185\u53EF\u89C1</li><li>private: \u5728\u540C\u4E00\u7C7B\u5185\u53EF\u89C1\uFF0C\u4E0D\u80FD\u4FEE\u9970\u7C7B</li><li>protected : \u5BF9\u540C\u4E00\u5305\u5185\u7684\u7C7B\u548C\u6240\u6709\u5B50\u7C7B\u53EF\u89C1\uFF0C\u4E0D\u80FD\u4FEE\u9970\u7C7B</li><li>public: \u5BF9\u6240\u6709\u7C7B\u53EF\u89C1</li></ul><h3 id="\u6784\u9020\u65B9\u6CD5\u3001\u6210\u5458\u53D8\u91CF\u521D\u59CB\u5316\u4EE5\u53CA\u9759\u6001\u6210\u5458\u53D8\u91CF\u4E09\u8005\u7684\u521D\u59CB\u5316\u987A\u5E8F" tabindex="-1"><a class="header-anchor" href="#\u6784\u9020\u65B9\u6CD5\u3001\u6210\u5458\u53D8\u91CF\u521D\u59CB\u5316\u4EE5\u53CA\u9759\u6001\u6210\u5458\u53D8\u91CF\u4E09\u8005\u7684\u521D\u59CB\u5316\u987A\u5E8F" aria-hidden="true">#</a> \u6784\u9020\u65B9\u6CD5\u3001\u6210\u5458\u53D8\u91CF\u521D\u59CB\u5316\u4EE5\u53CA\u9759\u6001\u6210\u5458\u53D8\u91CF\u4E09\u8005\u7684\u521D\u59CB\u5316\u987A\u5E8F\uFF1F</h3><p>\u5148\u540E\u987A\u5E8F\uFF1A\u9759\u6001\u6210\u5458\u53D8\u91CF\u3001\u6210\u5458\u53D8\u91CF\u3001\u6784\u9020\u65B9\u6CD5\u3002</p><p>\u8BE6\u7EC6\u7684\u5148\u540E\u987A\u5E8F\uFF1A\u7236\u7C7B\u9759\u6001\u53D8\u91CF\u3001\u7236\u7C7B\u9759\u6001\u4EE3\u7801\u5757\u3001\u5B50\u7C7B\u9759\u6001\u53D8\u91CF\u3001\u5B50\u7C7B\u9759\u6001\u4EE3\u7801\u5757\u3001\u7236\u7C7B\u975E\u9759\u6001\u53D8\u91CF\u3001\u7236\u7C7B\u975E\u9759\u6001\u4EE3\u7801\u5757\u3001\u7236\u7C7B\u6784\u9020\u51FD\u6570\u3001\u5B50\u7C7B\u975E\u9759\u6001\u53D8\u91CF\u3001\u5B50\u7C7B\u975E\u9759\u6001\u4EE3\u7801\u5757\u3001\u5B50\u7C7B\u6784\u9020\u51FD\u6570\u3002</p><h3 id="java-\u4EE3\u7801\u5757\u6267\u884C\u987A\u5E8F" tabindex="-1"><a class="header-anchor" href="#java-\u4EE3\u7801\u5757\u6267\u884C\u987A\u5E8F" aria-hidden="true">#</a> Java \u4EE3\u7801\u5757\u6267\u884C\u987A\u5E8F</h3><ul><li>\u7236\u7C7B\u9759\u6001\u4EE3\u7801\u5757\uFF08\u53EA\u6267\u884C\u4E00\u6B21\uFF09</li><li>\u5B50\u7C7B\u9759\u6001\u4EE3\u7801\u5757\uFF08\u53EA\u6267\u884C\u4E00\u6B21\uFF09</li><li>\u7236\u7C7B\u6784\u9020\u4EE3\u7801\u5757</li><li>\u7236\u7C7B\u6784\u9020\u51FD\u6570</li><li>\u5B50\u7C7B\u6784\u9020\u4EE3\u7801\u5757</li><li>\u5B50\u7C7B\u6784\u9020\u51FD\u6570</li><li>\u666E\u901A\u4EE3\u7801\u5757</li></ul><h3 id="\u9762\u5411\u5BF9\u8C61\u7684\u4E09\u5927\u7279\u6027" tabindex="-1"><a class="header-anchor" href="#\u9762\u5411\u5BF9\u8C61\u7684\u4E09\u5927\u7279\u6027" aria-hidden="true">#</a> \u9762\u5411\u5BF9\u8C61\u7684\u4E09\u5927\u7279\u6027\uFF1F</h3><p>\u7EE7\u627F\uFF1A\u5BF9\u8C61\u7684\u4E00\u4E2A\u65B0\u7C7B\u53EF\u4EE5\u4ECE\u73B0\u6709\u7684\u7C7B\u4E2D\u6D3E\u751F\uFF0C\u6D3E\u751F\u7C7B\u53EF\u4EE5\u4ECE\u5B83\u7684\u57FA\u7C7B\u90A3\u7EE7\u627F\u65B9\u6CD5\u548C\u5B9E\u4F8B\u53D8\u91CF\uFF0C\u4E14\u6D3E\u751F\u7C7B\u53EF\u4EE5\u4FEE\u6539\u6216\u65B0\u589E\u65B0\u7684\u65B9\u6CD5\u4F7F\u4E4B\u66F4\u9002\u5408\u7279\u6B8A\u7684\u9700\u6C42\u3002</p><p>\u5C01\u88C5\uFF1A\u5C06\u5BA2\u89C2\u4E8B\u7269\u62BD\u8C61\u6210\u7C7B\uFF0C\u6BCF\u4E2A\u7C7B\u53EF\u4EE5\u628A\u81EA\u8EAB\u6570\u636E\u548C\u65B9\u6CD5\u53EA\u8BA9\u53EF\u4FE1\u7684\u7C7B\u6216\u5BF9\u8C61\u64CD\u4F5C\uFF0C\u5BF9\u4E0D\u53EF\u4FE1\u7684\u8FDB\u884C\u4FE1\u606F\u9690\u85CF\u3002</p><p>\u591A\u6001\uFF1A\u5141\u8BB8\u4E0D\u540C\u7C7B\u7684\u5BF9\u8C61\u5BF9\u540C\u4E00\u6D88\u606F\u4F5C\u51FA\u54CD\u5E94\u3002\u4E0D\u540C\u5BF9\u8C61\u8C03\u7528\u76F8\u540C\u65B9\u6CD5\u5373\u4F7F\u53C2\u6570\u4E5F\u76F8\u540C\uFF0C\u6700\u7EC8\u8868\u73B0\u884C\u4E3A\u662F\u4E0D\u4E00\u6837\u7684\u3002</p><h3 id="\u4E3A\u4EC0\u4E48-java-\u8BED\u8A00\u4E0D\u652F\u6301\u591A\u91CD\u7EE7\u627F" tabindex="-1"><a class="header-anchor" href="#\u4E3A\u4EC0\u4E48-java-\u8BED\u8A00\u4E0D\u652F\u6301\u591A\u91CD\u7EE7\u627F" aria-hidden="true">#</a> \u4E3A\u4EC0\u4E48 Java \u8BED\u8A00\u4E0D\u652F\u6301\u591A\u91CD\u7EE7\u627F\uFF1F</h3><p>\u4E3A\u4E86\u7A0B\u5E8F\u7684\u7ED3\u6784\u80FD\u591F\u66F4\u52A0\u6E05\u6670\u4ECE\u800C\u4FBF\u4E8E\u7EF4\u62A4\u3002\u5047\u8BBE Java \u8BED\u8A00\u652F\u6301\u591A\u91CD\u7EE7\u627F\uFF0C\u7C7B C \u7EE7\u627F\u81EA\u7C7B A \u548C\u7C7B B\uFF0C\u5982\u679C\u7C7B A \u548C B \u90FD\u6709\u81EA\u5B9A\u4E49\u7684\u6210\u5458\u65B9\u6CD5 <code>f()</code>\uFF0C\u90A3\u4E48\u5F53\u4EE3\u7801\u4E2D\u8C03\u7528\u7C7B C \u7684 <code>f()</code> \u4F1A\u4EA7\u751F\u4E8C\u4E49\u6027\u3002</p><p>Java \u8BED\u8A00\u901A\u8FC7\u5B9E\u73B0\u591A\u4E2A\u63A5\u53E3\u95F4\u63A5\u652F\u6301\u591A\u91CD\u7EE7\u627F\uFF0C\u63A5\u53E3\u7531\u4E8E\u53EA\u5305\u542B\u65B9\u6CD5\u5B9A\u4E49\uFF0C\u4E0D\u80FD\u6709\u65B9\u6CD5\u7684\u5B9E\u73B0\uFF0C\u7C7B C \u7EE7\u627F\u63A5\u53E3 A \u4E0E\u63A5\u53E3 B \u65F6\u5373\u4F7F\u5B83\u4EEC\u90FD\u6709\u65B9\u6CD5<code>f()</code>\uFF0C\u4E5F\u4E0D\u80FD\u76F4\u63A5\u8C03\u7528\u65B9\u6CD5\uFF0C\u9700\u5B9E\u73B0\u5177\u4F53\u7684<code>f()</code>\u65B9\u6CD5\u624D\u80FD\u8C03\u7528\uFF0C\u4E0D\u4F1A\u4EA7\u751F\u4E8C\u4E49\u6027\u3002</p><p>\u591A\u91CD\u7EE7\u627F\u4F1A\u4F7F\u7C7B\u578B\u8F6C\u6362\u3001\u6784\u9020\u65B9\u6CD5\u7684\u8C03\u7528\u987A\u5E8F\u53D8\u5F97\u590D\u6742\uFF0C\u4F1A\u5F71\u54CD\u5230\u6027\u80FD\u3002</p><h3 id="\u7B80\u8FF0-java-\u7684\u591A\u6001" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0-java-\u7684\u591A\u6001" aria-hidden="true">#</a> \u7B80\u8FF0 Java \u7684\u591A\u6001</h3><p>Java \u591A\u6001\u53EF\u4EE5\u5206\u4E3A\u7F16\u8BD1\u65F6\u591A\u6001\u548C\u8FD0\u884C\u65F6\u591A\u6001\u3002</p><p>\u7F16\u8BD1\u65F6\u591A\u6001\u4E3B\u8981\u6307\u65B9\u6CD5\u7684\u91CD\u8F7D\uFF0C\u5373\u901A\u8FC7\u53C2\u6570\u5217\u8868\u7684\u4E0D\u540C\u6765\u533A\u5206\u4E0D\u540C\u7684\u65B9\u6CD5\u3002</p><p>\u8FD0\u884C\u65F6\u591A\u6001\u4E3B\u8981\u6307\u7EE7\u627F\u7236\u7C7B\u548C\u5B9E\u73B0\u63A5\u53E3\u65F6\uFF0C\u53EF\u4F7F\u7528\u7236\u7C7B\u5F15\u7528\u6307\u5411\u5B50\u7C7B\u5BF9\u8C61\u3002</p><p>\u8FD0\u884C\u65F6\u591A\u6001\u7684\u5B9E\u73B0\uFF1A\u4E3B\u8981\u4F9D\u9760\u65B9\u6CD5\u8868\uFF0C\u65B9\u6CD5\u8868\u4E2D\u6700\u5148\u5B58\u653E\u7684\u662F Object \u7C7B\u7684\u65B9\u6CD5\uFF0C\u63A5\u4E0B\u6765\u662F\u8BE5\u7C7B\u7684\u7236\u7C7B\u7684\u65B9\u6CD5\uFF0C\u6700\u540E\u662F\u8BE5\u7C7B\u672C\u8EAB\u7684\u65B9\u6CD5\u3002\u5982\u679C\u5B50\u7C7B\u6539\u5199\u4E86\u7236\u7C7B\u7684\u65B9\u6CD5\uFF0C\u90A3\u4E48\u5B50\u7C7B\u548C\u7236\u7C7B\u7684\u90A3\u4E9B\u540C\u540D\u65B9\u6CD5\u5171\u4EAB\u4E00\u4E2A\u65B9\u6CD5\u8868\u9879\uFF0C\u90FD\u88AB\u8BA4\u4F5C\u662F\u7236\u7C7B\u7684\u65B9\u6CD5\u3002\u56E0\u6B64\u53EF\u4EE5\u5B9E\u73B0\u8FD0\u884C\u65F6\u591A\u6001\u3002</p><h3 id="java-\u63D0\u4F9B\u7684\u591A\u6001\u673A\u5236" tabindex="-1"><a class="header-anchor" href="#java-\u63D0\u4F9B\u7684\u591A\u6001\u673A\u5236" aria-hidden="true">#</a> Java \u63D0\u4F9B\u7684\u591A\u6001\u673A\u5236\uFF1F</h3><p>Java \u63D0\u4F9B\u4E86\u4E24\u79CD\u7528\u4E8E\u591A\u6001\u7684\u673A\u5236\uFF0C\u5206\u522B\u662F\u91CD\u8F7D\u4E0E\u8986\u76D6\u3002</p><p>\u91CD\u8F7D\uFF1A\u91CD\u8F7D\u662F\u6307\u540C\u4E00\u4E2A\u7C7B\u4E2D\u6709\u591A\u4E2A\u540C\u540D\u7684\u65B9\u6CD5\uFF0C\u4F46\u8FD9\u4E9B\u65B9\u6CD5\u6709\u4E0D\u540C\u7684\u53C2\u6570\uFF0C\u5728\u7F16\u8BD1\u671F\u95F4\u5C31\u53EF\u4EE5\u786E\u5B9A\u8C03\u7528\u54EA\u4E2A\u65B9\u6CD5\u3002</p><p>\u8986\u76D6\uFF1A\u8986\u76D6\u662F\u6307\u6D3E\u751F\u7C7B\u91CD\u5199\u57FA\u7C7B\u7684\u65B9\u6CD5\uFF0C\u4F7F\u7528\u57FA\u7C7B\u6307\u5411\u5176\u5B50\u7C7B\u7684\u5B9E\u4F8B\u5BF9\u8C61\uFF0C\u6216\u63A5\u53E3\u7684\u5F15\u7528\u53D8\u91CF\u6307\u5411\u5176\u5B9E\u73B0\u7C7B\u7684\u5B9E\u4F8B\u5BF9\u8C61\uFF0C\u5728\u7A0B\u5E8F\u8C03\u7528\u7684\u8FD0\u884C\u671F\u6839\u636E\u5F15\u7528\u53D8\u91CF\u6240\u6307\u7684\u5177\u4F53\u5B9E\u4F8B\u5BF9\u8C61\u8C03\u7528\u6B63\u5728\u8FD0\u884C\u7684\u90A3\u4E2A\u5BF9\u8C61\u7684\u65B9\u6CD5\uFF0C\u5373\u9700\u8981\u5230\u8FD0\u884C\u671F\u624D\u80FD\u786E\u5B9A\u8C03\u7528\u54EA\u4E2A\u65B9\u6CD5\u3002</p><h3 id="\u91CD\u8F7D\u4E0E\u8986\u76D6\u7684\u533A\u522B" tabindex="-1"><a class="header-anchor" href="#\u91CD\u8F7D\u4E0E\u8986\u76D6\u7684\u533A\u522B" aria-hidden="true">#</a> \u91CD\u8F7D\u4E0E\u8986\u76D6\u7684\u533A\u522B\uFF1F</h3><ul><li>\u8986\u76D6\u662F\u7236\u7C7B\u4E0E\u5B50\u7C7B\u4E4B\u95F4\u7684\u5173\u7CFB\uFF0C\u662F\u5782\u76F4\u5173\u7CFB\uFF1B\u91CD\u8F7D\u662F\u540C\u4E00\u7C7B\u4E2D\u65B9\u6CD5\u4E4B\u95F4\u7684\u5173\u7CFB\uFF0C\u662F\u6C34\u5E73\u5173\u7CFB\u3002</li><li>\u8986\u76D6\u53EA\u80FD\u7531\u4E00\u4E2A\u65B9\u6CD5\u6216\u4E00\u5BF9\u65B9\u6CD5\u4EA7\u751F\u5173\u7CFB\uFF1B\u91CD\u8F7D\u662F\u591A\u4E2A\u65B9\u6CD5\u4E4B\u95F4\u7684\u5173\u7CFB\u3002</li><li>\u8986\u76D6\u8981\u6C42\u53C2\u6570\u5217\u8868\u76F8\u540C\uFF1B\u91CD\u8F7D\u8981\u6C42\u53C2\u6570\u5217\u8868\u4E0D\u540C\u3002</li><li>\u8986\u76D6\u4E2D\uFF0C\u8C03\u7528\u65B9\u6CD5\u4F53\u662F\u6839\u636E\u5BF9\u8C61\u7684\u7C7B\u578B\u6765\u51B3\u5B9A\u7684\uFF0C\u800C\u91CD\u8F7D\u662F\u6839\u636E\u8C03\u7528\u65F6\u5B9E\u53C2\u8868\u4E0E\u5F62\u53C2\u8868\u6765\u5BF9\u5E94\u9009\u62E9\u65B9\u6CD5\u4F53\u3002</li><li>\u91CD\u8F7D\u65B9\u6CD5\u53EF\u4EE5\u6539\u53D8\u8FD4\u56DE\u503C\u7684\u7C7B\u578B\uFF0C\u8986\u76D6\u65B9\u6CD5\u4E0D\u80FD\u6539\u53D8\u8FD4\u56DE\u503C\u7684\u7C7B\u578B\u3002</li></ul><h3 id="\u63A5\u53E3\u548C\u62BD\u8C61\u7C7B\u7684\u76F8\u540C\u70B9\u548C\u4E0D\u540C\u70B9" tabindex="-1"><a class="header-anchor" href="#\u63A5\u53E3\u548C\u62BD\u8C61\u7C7B\u7684\u76F8\u540C\u70B9\u548C\u4E0D\u540C\u70B9" aria-hidden="true">#</a> \u63A5\u53E3\u548C\u62BD\u8C61\u7C7B\u7684\u76F8\u540C\u70B9\u548C\u4E0D\u540C\u70B9\uFF1F</h3><p>\u76F8\u540C\u70B9:</p><ul><li>\u90FD\u4E0D\u80FD\u88AB\u5B9E\u4F8B\u5316\u3002</li><li>\u63A5\u53E3\u7684\u5B9E\u73B0\u7C7B\u6216\u62BD\u8C61\u7C7B\u7684\u5B50\u7C7B\u9700\u5B9E\u73B0\u63A5\u53E3\u6216\u62BD\u8C61\u7C7B\u4E2D\u76F8\u5E94\u7684\u65B9\u6CD5\u624D\u80FD\u88AB\u5B9E\u4F8B\u5316\u3002</li></ul><p>\u4E0D\u540C\u70B9\uFF1A</p><ul><li><p>\u63A5\u53E3\u53EA\u80FD\u6709\u65B9\u6CD5\u5B9A\u4E49\uFF0C\u4E0D\u80FD\u6709\u65B9\u6CD5\u7684\u5B9E\u73B0\uFF0C\u800C\u62BD\u8C61\u7C7B\u53EF\u4EE5\u6709\u65B9\u6CD5\u7684\u5B9A\u4E49\u4E0E\u5B9E\u73B0\u3002</p></li><li><p>\u5B9E\u73B0\u63A5\u53E3\u7684\u5173\u952E\u5B57\u4E3A implements\uFF0C\u7EE7\u627F\u62BD\u8C61\u7C7B\u7684\u5173\u952E\u5B57\u4E3A extends\u3002\u4E00\u4E2A\u7C7B\u53EF\u4EE5\u5B9E\u73B0\u591A\u4E2A\u63A5\u53E3\uFF0C\u53EA\u80FD\u7EE7\u627F\u4E00\u4E2A\u62BD\u8C61\u7C7B\u3002</p></li><li><p>\u5F53\u5B50\u7C7B\u548C\u7236\u7C7B\u4E4B\u95F4\u5B58\u5728\u903B\u8F91\u4E0A\u7684\u5C42\u6B21\u7ED3\u6784\uFF0C\u63A8\u8350\u4F7F\u7528\u62BD\u8C61\u7C7B\uFF0C\u6709\u5229\u4E8E\u529F\u80FD\u7684\u7D2F\u79EF\u3002\u5F53\u529F\u80FD\u4E0D\u9700\u8981\uFF0C\u5E0C\u671B\u652F\u6301\u5DEE\u522B\u8F83\u5927\u7684\u4E24\u4E2A\u6216\u66F4\u591A\u5BF9\u8C61\u95F4\u7684\u7279\u5B9A\u4EA4\u4E92\u884C\u4E3A\uFF0C\u63A8\u8350\u4F7F\u7528\u63A5\u53E3\u3002\u4F7F\u7528\u63A5\u53E3\u80FD\u964D\u4F4E\u8F6F\u4EF6\u7CFB\u7EDF\u7684\u8026\u5408\u5EA6\uFF0C\u4FBF\u4E8E\u65E5\u540E\u7EF4\u62A4\u6216\u6DFB\u52A0\u5220\u9664\u65B9\u6CD5\u3002</p></li></ul><h3 id="\u7B80\u8FF0\u62BD\u8C61\u7C7B\u4E0E\u63A5\u53E3\u7684\u533A\u522B" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0\u62BD\u8C61\u7C7B\u4E0E\u63A5\u53E3\u7684\u533A\u522B" aria-hidden="true">#</a> \u7B80\u8FF0\u62BD\u8C61\u7C7B\u4E0E\u63A5\u53E3\u7684\u533A\u522B</h3><p>\u62BD\u8C61\u7C7B\uFF1A\u4F53\u73B0\u7684\u662F is-a \u7684\u5173\u7CFB\uFF0C\u5982\u5BF9\u4E8E man is a person\uFF0C\u5C31\u53EF\u4EE5\u5C06 person \u5B9A\u4E49\u4E3A\u62BD\u8C61\u7C7B\u3002</p><p>\u63A5\u53E3\uFF1A\u4F53\u73B0\u7684\u662F can \u7684\u5173\u7CFB\u3002\u662F\u4F5C\u4E3A\u6A21\u677F\u5B9E\u73B0\u7684\u3002\u5982\u8BBE\u7F6E\u63A5\u53E3 fly\uFF0Cplane \u7C7B\u548C bird \u7C7B\u5747\u53EF\u5B9E\u73B0\u8BE5\u63A5\u53E3\u3002</p><p>\u4E00\u4E2A\u7C7B\u53EA\u80FD\u7EE7\u627F\u4E00\u4E2A\u62BD\u8C61\u7C7B\uFF0C\u4F46\u53EF\u4EE5\u5B9E\u73B0\u591A\u4E2A\u63A5\u53E3\u3002</p><h3 id="\u7B80\u8FF0\u5185\u90E8\u7C7B\u53CA\u5176\u4F5C\u7528" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0\u5185\u90E8\u7C7B\u53CA\u5176\u4F5C\u7528" aria-hidden="true">#</a> \u7B80\u8FF0\u5185\u90E8\u7C7B\u53CA\u5176\u4F5C\u7528</h3><ul><li>\u6210\u5458\u5185\u90E8\u7C7B\uFF1A\u4F5C\u4E3A\u6210\u5458\u5BF9\u8C61\u7684\u5185\u90E8\u7C7B\u3002\u53EF\u4EE5\u8BBF\u95EE private \u53CA\u4EE5\u4E0A\u5916\u90E8\u7C7B\u7684\u5C5E\u6027\u548C\u65B9\u6CD5\u3002\u5916\u90E8\u7C7B\u60F3\u8981\u8BBF\u95EE\u5185\u90E8\u7C7B\u5C5E\u6027\u6216\u65B9\u6CD5\u65F6\uFF0C\u5FC5\u987B\u8981\u521B\u5EFA\u4E00\u4E2A\u5185\u90E8\u7C7B\u5BF9\u8C61\uFF0C\u7136\u540E\u901A\u8FC7\u8BE5\u5BF9\u8C61\u8BBF\u95EE\u5185\u90E8\u7C7B\u7684\u5C5E\u6027\u6216\u65B9\u6CD5\u3002\u5916\u90E8\u7C7B\u4E5F\u53EF\u8BBF\u95EE private \u4FEE\u9970\u7684\u5185\u90E8\u7C7B\u5C5E\u6027\u3002</li><li>\u5C40\u90E8\u5185\u90E8\u7C7B\uFF1A\u5B58\u5728\u4E8E\u65B9\u6CD5\u4E2D\u7684\u5185\u90E8\u7C7B\u3002\u8BBF\u95EE\u6743\u9650\u7C7B\u4F3C\u5C40\u90E8\u53D8\u91CF\uFF0C\u53EA\u80FD\u8BBF\u95EE\u5916\u90E8\u7C7B\u7684 final \u53D8\u91CF\u3002</li><li>\u533F\u540D\u5185\u90E8\u7C7B\uFF1A\u53EA\u80FD\u4F7F\u7528\u4E00\u6B21\uFF0C\u6CA1\u6709\u7C7B\u540D\uFF0C\u53EA\u80FD\u8BBF\u95EE\u5916\u90E8\u7C7B\u7684 final \u53D8\u91CF\u3002</li><li>\u9759\u6001\u5185\u90E8\u7C7B\uFF1A\u7C7B\u4F3C\u7C7B\u7684\u9759\u6001\u6210\u5458\u53D8\u91CF\u3002</li></ul><h3 id="java-\u8BED\u8A00\u4E2D\u5173\u952E\u5B57-static-\u7684\u4F5C\u7528\u662F\u4EC0\u4E48" tabindex="-1"><a class="header-anchor" href="#java-\u8BED\u8A00\u4E2D\u5173\u952E\u5B57-static-\u7684\u4F5C\u7528\u662F\u4EC0\u4E48" aria-hidden="true">#</a> Java \u8BED\u8A00\u4E2D\u5173\u952E\u5B57 static \u7684\u4F5C\u7528\u662F\u4EC0\u4E48\uFF1F</h3><p>static \u7684\u4E3B\u8981\u4F5C\u7528\u6709\u4E24\u4E2A\uFF1A</p><ul><li>\u4E3A\u67D0\u79CD\u7279\u5B9A\u6570\u636E\u7C7B\u578B\u6216\u5BF9\u8C61\u5206\u914D\u4E0E\u521B\u5EFA\u5BF9\u8C61\u4E2A\u6570\u65E0\u5173\u7684\u5355\u4E00\u7684\u5B58\u50A8\u7A7A\u95F4\u3002</li><li>\u4F7F\u5F97\u67D0\u4E2A\u65B9\u6CD5\u6216\u5C5E\u6027\u4E0E\u7C7B\u800C\u4E0D\u662F\u5BF9\u8C61\u5173\u8054\u5728\u4E00\u8D77\uFF0C\u5373\u5728\u4E0D\u521B\u5EFA\u5BF9\u8C61\u7684\u60C5\u51B5\u4E0B\u53EF\u901A\u8FC7\u7C7B\u76F4\u63A5\u8C03\u7528\u65B9\u6CD5\u6216\u4F7F\u7528\u7C7B\u7684\u5C5E\u6027\u3002</li></ul><p>\u5177\u4F53\u800C\u8A00 static \u53C8\u53EF\u5206\u4E3A 4 \u79CD\u4F7F\u7528\u65B9\u5F0F\uFF1A</p><ul><li>\u4FEE\u9970\u6210\u5458\u53D8\u91CF\u3002\u7528 static \u5173\u952E\u5B57\u4FEE\u9970\u7684\u9759\u6001\u53D8\u91CF\u5728\u5185\u5B58\u4E2D\u53EA\u6709\u4E00\u4E2A\u526F\u672C\u3002\u53EA\u8981\u9759\u6001\u53D8\u91CF\u6240\u5728\u7684\u7C7B\u88AB\u52A0\u8F7D\uFF0C\u8FD9\u4E2A\u9759\u6001\u53D8\u91CF\u5C31\u4F1A\u88AB\u5206\u914D\u7A7A\u95F4\uFF0C\u53EF\u4EE5\u4F7F\u7528\u201C\u7C7B.\u9759\u6001\u53D8\u91CF\u201D\u548C\u201C\u5BF9\u8C61.\u9759\u6001\u53D8\u91CF\u201D\u7684\u65B9\u6CD5\u4F7F\u7528\u3002</li><li>\u4FEE\u9970\u6210\u5458\u65B9\u6CD5\u3002static \u4FEE\u9970\u7684\u65B9\u6CD5\u65E0\u9700\u521B\u5EFA\u5BF9\u8C61\u5C31\u53EF\u4EE5\u88AB\u8C03\u7528\u3002static \u65B9\u6CD5\u4E2D\u4E0D\u80FD\u4F7F\u7528 this \u548C super \u5173\u952E\u5B57\uFF0C\u4E0D\u80FD\u8C03\u7528\u975E static \u65B9\u6CD5\uFF0C\u53EA\u80FD\u8BBF\u95EE\u6240\u5C5E\u7C7B\u7684\u9759\u6001\u6210\u5458\u53D8\u91CF\u548C\u9759\u6001\u6210\u5458\u65B9\u6CD5\u3002</li><li>\u4FEE\u9970\u4EE3\u7801\u5757\u3002JVM \u5728\u52A0\u8F7D\u7C7B\u7684\u65F6\u5019\u4F1A\u6267\u884C static \u4EE3\u7801\u5757\u3002static \u4EE3\u7801\u5757\u5E38\u7528\u4E8E\u521D\u59CB\u5316\u9759\u6001\u53D8\u91CF\u3002static \u4EE3\u7801\u5757\u53EA\u4F1A\u88AB\u6267\u884C\u4E00\u6B21\u3002</li><li>\u4FEE\u9970\u5185\u90E8\u7C7B\u3002static \u5185\u90E8\u7C7B\u53EF\u4EE5\u4E0D\u4F9D\u8D56\u5916\u90E8\u7C7B\u5B9E\u4F8B\u5BF9\u8C61\u800C\u88AB\u5B9E\u4F8B\u5316\u3002\u9759\u6001\u5185\u90E8\u7C7B\u4E0D\u80FD\u4E0E\u5916\u90E8\u7C7B\u6709\u76F8\u540C\u7684\u540D\u5B57\uFF0C\u4E0D\u80FD\u8BBF\u95EE\u666E\u901A\u6210\u5458\u53D8\u91CF\uFF0C\u53EA\u80FD\u8BBF\u95EE\u5916\u90E8\u7C7B\u4E2D\u7684\u9759\u6001\u6210\u5458\u548C\u9759\u6001\u6210\u5458\u65B9\u6CD5\u3002</li></ul><h3 id="\u4E3A\u4EC0\u4E48\u8981\u628A-string-\u8BBE\u8BA1\u4E3A\u4E0D\u53EF\u53D8" tabindex="-1"><a class="header-anchor" href="#\u4E3A\u4EC0\u4E48\u8981\u628A-string-\u8BBE\u8BA1\u4E3A\u4E0D\u53EF\u53D8" aria-hidden="true">#</a> \u4E3A\u4EC0\u4E48\u8981\u628A String \u8BBE\u8BA1\u4E3A\u4E0D\u53EF\u53D8\uFF1F</h3><ul><li>\u8282\u7701\u7A7A\u95F4\uFF1A\u5B57\u7B26\u4E32\u5E38\u91CF\u5B58\u50A8\u5728 JVM \u7684\u5B57\u7B26\u4E32\u6C60\u4E2D\u53EF\u4EE5\u88AB\u7528\u6237\u5171\u4EAB\u3002</li><li>\u63D0\u9AD8\u6548\u7387\uFF1AString \u53EF\u4EE5\u88AB\u4E0D\u540C\u7EBF\u7A0B\u5171\u4EAB\uFF0C\u662F\u7EBF\u7A0B\u5B89\u5168\u7684\u3002\u5728\u6D89\u53CA\u591A\u7EBF\u7A0B\u64CD\u4F5C\u4E2D\u4E0D\u9700\u8981\u540C\u6B65\u64CD\u4F5C\u3002</li><li>\u5B89\u5168\uFF1AString \u5E38\u88AB\u7528\u4E8E\u7528\u6237\u540D\u3001\u5BC6\u7801\u3001\u6587\u4EF6\u540D\u7B49\u4F7F\u7528\uFF0C\u7531\u4E8E\u5176\u4E0D\u53EF\u53D8\uFF0C\u53EF\u907F\u514D\u9ED1\u5BA2\u884C\u4E3A\u5BF9\u5176\u6076\u610F\u4FEE\u6539\u3002</li></ul><h3 id="\u7B80\u8FF0-string-stringbuffer-\u4E0E-stringbuilder" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0-string-stringbuffer-\u4E0E-stringbuilder" aria-hidden="true">#</a> \u7B80\u8FF0 String/StringBuffer \u4E0E StringBuilder</h3><p>String \u7C7B\u91C7\u7528\u5229\u7528 final \u4FEE\u9970\u7684\u5B57\u7B26\u6570\u7EC4\u8FDB\u884C\u5B57\u7B26\u4E32\u4FDD\u5B58\uFF0C\u56E0\u6B64\u4E0D\u53EF\u53D8\u3002\u5982\u679C\u5BF9 String \u7C7B\u578B\u5BF9\u8C61\u4FEE\u6539\uFF0C\u9700\u8981\u65B0\u5EFA\u5BF9\u8C61\uFF0C\u5C06\u8001\u5B57\u7B26\u548C\u65B0\u589E\u52A0\u7684\u5B57\u7B26\u4E00\u5E76\u5B58\u8FDB\u53BB\u3002</p><p>StringBuilder\uFF0C\u91C7\u7528\u65E0 final \u4FEE\u9970\u7684\u5B57\u7B26\u6570\u7EC4\u8FDB\u884C\u4FDD\u5B58\uFF0C\u56E0\u6B64\u53EF\u53D8\u3002\u4F46\u7EBF\u7A0B\u4E0D\u5B89\u5168\u3002</p><p>StringBuffer\uFF0C\u91C7\u7528\u65E0 final \u4FEE\u9970\u7684\u5B57\u7B26\u6570\u7EC4\u8FDB\u884C\u4FDD\u5B58\uFF0C\u53EF\u7406\u89E3\u4E3A\u5B9E\u73B0\u7EBF\u7A0B\u5B89\u5168\u7684 StringBuilder\u3002</p><h3 id="\u5224\u7B49\u8FD0\u7B97\u7B26-\u4E0E-equals-\u7684\u533A\u522B" tabindex="-1"><a class="header-anchor" href="#\u5224\u7B49\u8FD0\u7B97\u7B26-\u4E0E-equals-\u7684\u533A\u522B" aria-hidden="true">#</a> \u5224\u7B49\u8FD0\u7B97\u7B26==\u4E0E equals \u7684\u533A\u522B\uFF1F</h3><p>== \u6BD4\u8F83\u7684\u662F\u5F15\u7528\uFF0Cequals \u6BD4\u8F83\u7684\u662F\u5185\u5BB9\u3002</p><p>\u5982\u679C\u53D8\u91CF\u662F\u57FA\u7840\u6570\u636E\u7C7B\u578B\uFF0C== \u7528\u4E8E\u6BD4\u8F83\u5176\u5BF9\u5E94\u503C\u662F\u5426\u76F8\u7B49\u3002\u5982\u679C\u53D8\u91CF\u6307\u5411\u7684\u662F\u5BF9\u8C61\uFF0C== \u7528\u4E8E\u6BD4\u8F83\u4E24\u4E2A\u5BF9\u8C61\u662F\u5426\u6307\u5411\u540C\u4E00\u5757\u5B58\u50A8\u7A7A\u95F4\u3002</p><p>equals \u662F Object \u7C7B\u63D0\u4F9B\u7684\u65B9\u6CD5\u4E4B\u4E00\uFF0C\u6BCF\u4E2A Java \u7C7B\u90FD\u7EE7\u627F\u81EA Object \u7C7B\uFF0C\u6240\u4EE5\u6BCF\u4E2A\u5BF9\u8C61\u90FD\u5177\u6709 equals \u8FD9\u4E2A\u65B9\u6CD5\u3002Object \u7C7B\u4E2D\u5B9A\u4E49\u7684 equals \u65B9\u6CD5\u5185\u90E8\u662F\u76F4\u63A5\u8C03\u7528 == \u6BD4\u8F83\u5BF9\u8C61\u7684\u3002\u4F46\u901A\u8FC7\u8986\u76D6\u7684\u65B9\u6CD5\u53EF\u4EE5\u8BA9\u5B83\u4E0D\u662F\u6BD4\u8F83\u5F15\u7528\u800C\u662F\u6BD4\u8F83\u6570\u636E\u5185\u5BB9\u3002</p><h3 id="\u7B80\u8FF0-object-\u7C7B\u5E38\u7528\u65B9\u6CD5" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0-object-\u7C7B\u5E38\u7528\u65B9\u6CD5" aria-hidden="true">#</a> \u7B80\u8FF0 Object \u7C7B\u5E38\u7528\u65B9\u6CD5</h3><ul><li>hashCode\uFF1A\u901A\u8FC7\u5BF9\u8C61\u8BA1\u7B97\u51FA\u7684\u6563\u5217\u7801\u3002\u7528\u4E8E map \u578B\u6216 equals \u65B9\u6CD5\u3002\u9700\u8981\u4FDD\u8BC1\u540C\u4E00\u4E2A\u5BF9\u8C61\u591A\u6B21\u8C03\u7528\u8BE5\u65B9\u6CD5\uFF0C\u603B\u8FD4\u56DE\u76F8\u540C\u7684\u6574\u578B\u503C\u3002</li><li>equals\uFF1A\u5224\u65AD\u4E24\u4E2A\u5BF9\u8C61\u662F\u5426\u4E00\u81F4\u3002\u9700\u4FDD\u8BC1 equals \u65B9\u6CD5\u76F8\u540C\u5BF9\u5E94\u7684\u5BF9\u8C61 hashCode \u4E5F\u76F8\u540C\u3002</li><li>toString: \u7528\u5B57\u7B26\u4E32\u8868\u793A\u8BE5\u5BF9\u8C61</li><li>clone:\u6DF1\u62F7\u8D1D\u4E00\u4E2A\u5BF9\u8C61</li></ul><h3 id="java-\u4E2D\u4E00\u7EF4\u6570\u7EC4\u548C\u4E8C\u7EF4\u6570\u7EC4\u7684\u58F0\u660E\u65B9\u5F0F" tabindex="-1"><a class="header-anchor" href="#java-\u4E2D\u4E00\u7EF4\u6570\u7EC4\u548C\u4E8C\u7EF4\u6570\u7EC4\u7684\u58F0\u660E\u65B9\u5F0F" aria-hidden="true">#</a> Java \u4E2D\u4E00\u7EF4\u6570\u7EC4\u548C\u4E8C\u7EF4\u6570\u7EC4\u7684\u58F0\u660E\u65B9\u5F0F\uFF1F</h3><p>\u4E00\u7EF4\u6570\u7EC4\u7684\u58F0\u660E\u65B9\u5F0F\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code>type arrayName<span class="token punctuation">[</span><span class="token punctuation">]</span>
+import{_ as l}from"./plugin-vue_export-helper.21dcd24c.js";import{r as n,o as s,c as r,a,b as t,e as h,d as e}from"./app.615e41d8.js";const d={},p=h(`<h1 id="java-\u57FA\u7840\u516B\u80A1\u6587-\u80CC\u8BF5\u7248-\u5FC5\u770B" tabindex="-1"><a class="header-anchor" href="#java-\u57FA\u7840\u516B\u80A1\u6587-\u80CC\u8BF5\u7248-\u5FC5\u770B" aria-hidden="true">#</a> Java \u57FA\u7840\u516B\u80A1\u6587\uFF08\u80CC\u8BF5\u7248\uFF09\u5FC5\u770B\u{1F44D}</h1><h3 id="java-\u8BED\u8A00\u5177\u6709\u54EA\u4E9B\u7279\u70B9" tabindex="-1"><a class="header-anchor" href="#java-\u8BED\u8A00\u5177\u6709\u54EA\u4E9B\u7279\u70B9" aria-hidden="true">#</a> Java \u8BED\u8A00\u5177\u6709\u54EA\u4E9B\u7279\u70B9\uFF1F</h3><ul><li>Java \u4E3A\u7EAF\u9762\u5411\u5BF9\u8C61\u7684\u8BED\u8A00\u3002\u5B83\u80FD\u591F\u76F4\u63A5\u53CD\u5E94\u73B0\u5B9E\u751F\u6D3B\u4E2D\u7684\u5BF9\u8C61\u3002</li><li>\u5177\u6709\u5E73\u53F0\u65E0\u5173\u6027\u3002Java \u5229\u7528 Java \u865A\u62DF\u673A\u8FD0\u884C\u5B57\u8282\u7801\uFF0C\u65E0\u8BBA\u662F\u5728 Windows\u3001Linux \u8FD8\u662F MacOS \u7B49\u5176\u5B83\u5E73\u53F0\u5BF9 Java \u7A0B\u5E8F\u8FDB\u884C\u7F16\u8BD1\uFF0C\u7F16\u8BD1\u540E\u7684\u7A0B\u5E8F\u53EF\u5728\u5176\u5B83\u5E73\u53F0\u8FD0\u884C\u3002</li><li>Java \u4E3A\u89E3\u91CA\u578B\u8BED\u8A00\uFF0C\u7F16\u8BD1\u5668\u628A Java \u4EE3\u7801\u7F16\u8BD1\u6210\u5E73\u53F0\u65E0\u5173\u7684\u4E2D\u95F4\u4EE3\u7801\uFF0C\u7136\u540E\u5728 JVM \u4E0A\u89E3\u91CA\u8FD0\u884C\uFF0C\u5177\u6709\u5F88\u597D\u7684\u53EF\u79FB\u690D\u6027\u3002</li><li>Java \u63D0\u4F9B\u4E86\u5F88\u591A\u5185\u7F6E\u7C7B\u5E93\u3002\u5982\u5BF9\u591A\u7EBF\u7A0B\u652F\u6301\uFF0C\u5BF9\u7F51\u7EDC\u901A\u4FE1\u652F\u6301\uFF0C\u6700\u91CD\u8981\u7684\u4E00\u70B9\u662F\u63D0\u4F9B\u4E86\u5783\u573E\u56DE\u6536\u5668\u3002</li><li>Java \u5177\u6709\u8F83\u597D\u7684\u5B89\u5168\u6027\u548C\u5065\u58EE\u6027\u3002Java \u63D0\u4F9B\u4E86\u5F02\u5E38\u5904\u7406\u548C\u5783\u573E\u56DE\u6536\u673A\u5236\uFF0C\u53BB\u9664\u4E86 C++\u4E2D\u96BE\u4EE5\u7406\u89E3\u7684\u6307\u9488\u7279\u6027\u3002</li></ul><h3 id="jdk-\u4E0E-jre-\u6709\u4EC0\u4E48\u533A\u522B" tabindex="-1"><a class="header-anchor" href="#jdk-\u4E0E-jre-\u6709\u4EC0\u4E48\u533A\u522B" aria-hidden="true">#</a> JDK \u4E0E JRE \u6709\u4EC0\u4E48\u533A\u522B\uFF1F</h3><ul><li>JDK\uFF1AJava \u5F00\u53D1\u5DE5\u5177\u5305\uFF08Java Development Kit\uFF09\uFF0C\u63D0\u4F9B\u4E86 Java \u7684\u5F00\u53D1\u73AF\u5883\u548C\u8FD0\u884C\u73AF\u5883\u3002</li><li>JRE\uFF1AJava \u8FD0\u884C\u73AF\u5883(Java Runtime Environment)\uFF0C\u63D0\u4F9B\u4E86 Java \u8FD0\u884C\u6240\u9700\u7684\u73AF\u5883\u3002</li><li>JDK \u5305\u542B\u4E86 JRE\u3002\u5982\u679C\u53EA\u8FD0\u884C Java \u7A0B\u5E8F\uFF0C\u5B89\u88C5 JRE \u5373\u53EF\u3002\u8981\u7F16\u5199 Java \u7A0B\u5E8F\u9700\u5B89\u88C5 JDK.</li></ul><h3 id="\u7B80\u8FF0-java-\u57FA\u672C\u6570\u636E\u7C7B\u578B" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0-java-\u57FA\u672C\u6570\u636E\u7C7B\u578B" aria-hidden="true">#</a> \u7B80\u8FF0 Java \u57FA\u672C\u6570\u636E\u7C7B\u578B</h3><ul><li>byte: \u5360\u7528 1 \u4E2A\u5B57\u8282\uFF0C\u53D6\u503C\u8303\u56F4-128 ~ 127</li><li>short: \u5360\u7528 2 \u4E2A\u5B57\u8282\uFF0C\u53D6\u503C\u8303\u56F4-2^15^ ~ 2^15^-1</li><li>int\uFF1A\u5360\u7528 4 \u4E2A\u5B57\u8282\uFF0C\u53D6\u503C\u8303\u56F4-2^31^ ~ 2^31^-1</li><li>long\uFF1A\u5360\u7528 8 \u4E2A\u5B57\u8282</li><li>float\uFF1A\u5360\u7528 4 \u4E2A\u5B57\u8282</li><li>double\uFF1A\u5360\u7528 8 \u4E2A\u5B57\u8282</li><li>char: \u5360\u7528 2 \u4E2A\u5B57\u8282</li><li>boolean\uFF1A\u5360\u7528\u5927\u5C0F\u6839\u636E\u5B9E\u73B0\u865A\u62DF\u673A\u4E0D\u540C\u6709\u6240\u5DEE\u5F02</li></ul><h3 id="\u7B80\u8FF0\u81EA\u52A8\u88C5\u7BB1\u62C6\u7BB1" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0\u81EA\u52A8\u88C5\u7BB1\u62C6\u7BB1" aria-hidden="true">#</a> \u7B80\u8FF0\u81EA\u52A8\u88C5\u7BB1\u62C6\u7BB1</h3><p>\u5BF9\u4E8E Java \u57FA\u672C\u6570\u636E\u7C7B\u578B\uFF0C\u5747\u5BF9\u5E94\u4E00\u4E2A\u5305\u88C5\u7C7B\u3002</p><p>\u88C5\u7BB1\u5C31\u662F\u81EA\u52A8\u5C06\u57FA\u672C\u6570\u636E\u7C7B\u578B\u8F6C\u6362\u4E3A\u5305\u88C5\u5668\u7C7B\u578B\uFF0C\u5982 int-&gt;Integer</p><p>\u62C6\u7BB1\u5C31\u662F\u81EA\u52A8\u5C06\u5305\u88C5\u5668\u7C7B\u578B\u8F6C\u6362\u4E3A\u57FA\u672C\u6570\u636E\u7C7B\u578B\uFF0C\u5982 Integer-&gt;int</p><h3 id="\u7B80\u8FF0-java-\u8BBF\u95EE\u4FEE\u9970\u7B26" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0-java-\u8BBF\u95EE\u4FEE\u9970\u7B26" aria-hidden="true">#</a> \u7B80\u8FF0 Java \u8BBF\u95EE\u4FEE\u9970\u7B26</h3><ul><li>default: \u9ED8\u8BA4\u8BBF\u95EE\u4FEE\u9970\u7B26\uFF0C\u5728\u540C\u4E00\u5305\u5185\u53EF\u89C1</li><li>private: \u5728\u540C\u4E00\u7C7B\u5185\u53EF\u89C1\uFF0C\u4E0D\u80FD\u4FEE\u9970\u7C7B</li><li>protected : \u5BF9\u540C\u4E00\u5305\u5185\u7684\u7C7B\u548C\u6240\u6709\u5B50\u7C7B\u53EF\u89C1\uFF0C\u4E0D\u80FD\u4FEE\u9970\u7C7B</li><li>public: \u5BF9\u6240\u6709\u7C7B\u53EF\u89C1</li></ul><h3 id="\u6784\u9020\u65B9\u6CD5\u3001\u6210\u5458\u53D8\u91CF\u521D\u59CB\u5316\u4EE5\u53CA\u9759\u6001\u6210\u5458\u53D8\u91CF\u4E09\u8005\u7684\u521D\u59CB\u5316\u987A\u5E8F" tabindex="-1"><a class="header-anchor" href="#\u6784\u9020\u65B9\u6CD5\u3001\u6210\u5458\u53D8\u91CF\u521D\u59CB\u5316\u4EE5\u53CA\u9759\u6001\u6210\u5458\u53D8\u91CF\u4E09\u8005\u7684\u521D\u59CB\u5316\u987A\u5E8F" aria-hidden="true">#</a> \u6784\u9020\u65B9\u6CD5\u3001\u6210\u5458\u53D8\u91CF\u521D\u59CB\u5316\u4EE5\u53CA\u9759\u6001\u6210\u5458\u53D8\u91CF\u4E09\u8005\u7684\u521D\u59CB\u5316\u987A\u5E8F\uFF1F</h3><p>\u5148\u540E\u987A\u5E8F\uFF1A\u9759\u6001\u6210\u5458\u53D8\u91CF\u3001\u6210\u5458\u53D8\u91CF\u3001\u6784\u9020\u65B9\u6CD5\u3002</p><p>\u8BE6\u7EC6\u7684\u5148\u540E\u987A\u5E8F\uFF1A\u7236\u7C7B\u9759\u6001\u53D8\u91CF\u3001\u7236\u7C7B\u9759\u6001\u4EE3\u7801\u5757\u3001\u5B50\u7C7B\u9759\u6001\u53D8\u91CF\u3001\u5B50\u7C7B\u9759\u6001\u4EE3\u7801\u5757\u3001\u7236\u7C7B\u975E\u9759\u6001\u53D8\u91CF\u3001\u7236\u7C7B\u975E\u9759\u6001\u4EE3\u7801\u5757\u3001\u7236\u7C7B\u6784\u9020\u51FD\u6570\u3001\u5B50\u7C7B\u975E\u9759\u6001\u53D8\u91CF\u3001\u5B50\u7C7B\u975E\u9759\u6001\u4EE3\u7801\u5757\u3001\u5B50\u7C7B\u6784\u9020\u51FD\u6570\u3002</p><h3 id="java-\u4EE3\u7801\u5757\u6267\u884C\u987A\u5E8F" tabindex="-1"><a class="header-anchor" href="#java-\u4EE3\u7801\u5757\u6267\u884C\u987A\u5E8F" aria-hidden="true">#</a> Java \u4EE3\u7801\u5757\u6267\u884C\u987A\u5E8F</h3><ul><li>\u7236\u7C7B\u9759\u6001\u4EE3\u7801\u5757\uFF08\u53EA\u6267\u884C\u4E00\u6B21\uFF09</li><li>\u5B50\u7C7B\u9759\u6001\u4EE3\u7801\u5757\uFF08\u53EA\u6267\u884C\u4E00\u6B21\uFF09</li><li>\u7236\u7C7B\u6784\u9020\u4EE3\u7801\u5757</li><li>\u7236\u7C7B\u6784\u9020\u51FD\u6570</li><li>\u5B50\u7C7B\u6784\u9020\u4EE3\u7801\u5757</li><li>\u5B50\u7C7B\u6784\u9020\u51FD\u6570</li><li>\u666E\u901A\u4EE3\u7801\u5757</li></ul><h3 id="\u9762\u5411\u5BF9\u8C61\u7684\u4E09\u5927\u7279\u6027" tabindex="-1"><a class="header-anchor" href="#\u9762\u5411\u5BF9\u8C61\u7684\u4E09\u5927\u7279\u6027" aria-hidden="true">#</a> \u9762\u5411\u5BF9\u8C61\u7684\u4E09\u5927\u7279\u6027\uFF1F</h3><p>\u7EE7\u627F\uFF1A\u5BF9\u8C61\u7684\u4E00\u4E2A\u65B0\u7C7B\u53EF\u4EE5\u4ECE\u73B0\u6709\u7684\u7C7B\u4E2D\u6D3E\u751F\uFF0C\u6D3E\u751F\u7C7B\u53EF\u4EE5\u4ECE\u5B83\u7684\u57FA\u7C7B\u90A3\u7EE7\u627F\u65B9\u6CD5\u548C\u5B9E\u4F8B\u53D8\u91CF\uFF0C\u4E14\u6D3E\u751F\u7C7B\u53EF\u4EE5\u4FEE\u6539\u6216\u65B0\u589E\u65B0\u7684\u65B9\u6CD5\u4F7F\u4E4B\u66F4\u9002\u5408\u7279\u6B8A\u7684\u9700\u6C42\u3002</p><p>\u5C01\u88C5\uFF1A\u5C06\u5BA2\u89C2\u4E8B\u7269\u62BD\u8C61\u6210\u7C7B\uFF0C\u6BCF\u4E2A\u7C7B\u53EF\u4EE5\u628A\u81EA\u8EAB\u6570\u636E\u548C\u65B9\u6CD5\u53EA\u8BA9\u53EF\u4FE1\u7684\u7C7B\u6216\u5BF9\u8C61\u64CD\u4F5C\uFF0C\u5BF9\u4E0D\u53EF\u4FE1\u7684\u8FDB\u884C\u4FE1\u606F\u9690\u85CF\u3002</p><p>\u591A\u6001\uFF1A\u5141\u8BB8\u4E0D\u540C\u7C7B\u7684\u5BF9\u8C61\u5BF9\u540C\u4E00\u6D88\u606F\u4F5C\u51FA\u54CD\u5E94\u3002\u4E0D\u540C\u5BF9\u8C61\u8C03\u7528\u76F8\u540C\u65B9\u6CD5\u5373\u4F7F\u53C2\u6570\u4E5F\u76F8\u540C\uFF0C\u6700\u7EC8\u8868\u73B0\u884C\u4E3A\u662F\u4E0D\u4E00\u6837\u7684\u3002</p><h3 id="\u4E3A\u4EC0\u4E48-java-\u8BED\u8A00\u4E0D\u652F\u6301\u591A\u91CD\u7EE7\u627F" tabindex="-1"><a class="header-anchor" href="#\u4E3A\u4EC0\u4E48-java-\u8BED\u8A00\u4E0D\u652F\u6301\u591A\u91CD\u7EE7\u627F" aria-hidden="true">#</a> \u4E3A\u4EC0\u4E48 Java \u8BED\u8A00\u4E0D\u652F\u6301\u591A\u91CD\u7EE7\u627F\uFF1F</h3><p>\u4E3A\u4E86\u7A0B\u5E8F\u7684\u7ED3\u6784\u80FD\u591F\u66F4\u52A0\u6E05\u6670\u4ECE\u800C\u4FBF\u4E8E\u7EF4\u62A4\u3002\u5047\u8BBE Java \u8BED\u8A00\u652F\u6301\u591A\u91CD\u7EE7\u627F\uFF0C\u7C7B C \u7EE7\u627F\u81EA\u7C7B A \u548C\u7C7B B\uFF0C\u5982\u679C\u7C7B A \u548C B \u90FD\u6709\u81EA\u5B9A\u4E49\u7684\u6210\u5458\u65B9\u6CD5 <code>f()</code>\uFF0C\u90A3\u4E48\u5F53\u4EE3\u7801\u4E2D\u8C03\u7528\u7C7B C \u7684 <code>f()</code> \u4F1A\u4EA7\u751F\u4E8C\u4E49\u6027\u3002</p><p>Java \u8BED\u8A00\u901A\u8FC7\u5B9E\u73B0\u591A\u4E2A\u63A5\u53E3\u95F4\u63A5\u652F\u6301\u591A\u91CD\u7EE7\u627F\uFF0C\u63A5\u53E3\u7531\u4E8E\u53EA\u5305\u542B\u65B9\u6CD5\u5B9A\u4E49\uFF0C\u4E0D\u80FD\u6709\u65B9\u6CD5\u7684\u5B9E\u73B0\uFF0C\u7C7B C \u7EE7\u627F\u63A5\u53E3 A \u4E0E\u63A5\u53E3 B \u65F6\u5373\u4F7F\u5B83\u4EEC\u90FD\u6709\u65B9\u6CD5<code>f()</code>\uFF0C\u4E5F\u4E0D\u80FD\u76F4\u63A5\u8C03\u7528\u65B9\u6CD5\uFF0C\u9700\u5B9E\u73B0\u5177\u4F53\u7684<code>f()</code>\u65B9\u6CD5\u624D\u80FD\u8C03\u7528\uFF0C\u4E0D\u4F1A\u4EA7\u751F\u4E8C\u4E49\u6027\u3002</p><p>\u591A\u91CD\u7EE7\u627F\u4F1A\u4F7F\u7C7B\u578B\u8F6C\u6362\u3001\u6784\u9020\u65B9\u6CD5\u7684\u8C03\u7528\u987A\u5E8F\u53D8\u5F97\u590D\u6742\uFF0C\u4F1A\u5F71\u54CD\u5230\u6027\u80FD\u3002</p><h3 id="\u7B80\u8FF0-java-\u7684\u591A\u6001" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0-java-\u7684\u591A\u6001" aria-hidden="true">#</a> \u7B80\u8FF0 Java \u7684\u591A\u6001</h3><p>Java \u591A\u6001\u53EF\u4EE5\u5206\u4E3A\u7F16\u8BD1\u65F6\u591A\u6001\u548C\u8FD0\u884C\u65F6\u591A\u6001\u3002</p><p>\u7F16\u8BD1\u65F6\u591A\u6001\u4E3B\u8981\u6307\u65B9\u6CD5\u7684\u91CD\u8F7D\uFF0C\u5373\u901A\u8FC7\u53C2\u6570\u5217\u8868\u7684\u4E0D\u540C\u6765\u533A\u5206\u4E0D\u540C\u7684\u65B9\u6CD5\u3002</p><p>\u8FD0\u884C\u65F6\u591A\u6001\u4E3B\u8981\u6307\u7EE7\u627F\u7236\u7C7B\u548C\u5B9E\u73B0\u63A5\u53E3\u65F6\uFF0C\u53EF\u4F7F\u7528\u7236\u7C7B\u5F15\u7528\u6307\u5411\u5B50\u7C7B\u5BF9\u8C61\u3002</p><p>\u8FD0\u884C\u65F6\u591A\u6001\u7684\u5B9E\u73B0\uFF1A\u4E3B\u8981\u4F9D\u9760\u65B9\u6CD5\u8868\uFF0C\u65B9\u6CD5\u8868\u4E2D\u6700\u5148\u5B58\u653E\u7684\u662F Object \u7C7B\u7684\u65B9\u6CD5\uFF0C\u63A5\u4E0B\u6765\u662F\u8BE5\u7C7B\u7684\u7236\u7C7B\u7684\u65B9\u6CD5\uFF0C\u6700\u540E\u662F\u8BE5\u7C7B\u672C\u8EAB\u7684\u65B9\u6CD5\u3002\u5982\u679C\u5B50\u7C7B\u6539\u5199\u4E86\u7236\u7C7B\u7684\u65B9\u6CD5\uFF0C\u90A3\u4E48\u5B50\u7C7B\u548C\u7236\u7C7B\u7684\u90A3\u4E9B\u540C\u540D\u65B9\u6CD5\u5171\u4EAB\u4E00\u4E2A\u65B9\u6CD5\u8868\u9879\uFF0C\u90FD\u88AB\u8BA4\u4F5C\u662F\u7236\u7C7B\u7684\u65B9\u6CD5\u3002\u56E0\u6B64\u53EF\u4EE5\u5B9E\u73B0\u8FD0\u884C\u65F6\u591A\u6001\u3002</p><h3 id="java-\u63D0\u4F9B\u7684\u591A\u6001\u673A\u5236" tabindex="-1"><a class="header-anchor" href="#java-\u63D0\u4F9B\u7684\u591A\u6001\u673A\u5236" aria-hidden="true">#</a> Java \u63D0\u4F9B\u7684\u591A\u6001\u673A\u5236\uFF1F</h3><p>Java \u63D0\u4F9B\u4E86\u4E24\u79CD\u7528\u4E8E\u591A\u6001\u7684\u673A\u5236\uFF0C\u5206\u522B\u662F\u91CD\u8F7D\u4E0E\u8986\u76D6\u3002</p><p>\u91CD\u8F7D\uFF1A\u91CD\u8F7D\u662F\u6307\u540C\u4E00\u4E2A\u7C7B\u4E2D\u6709\u591A\u4E2A\u540C\u540D\u7684\u65B9\u6CD5\uFF0C\u4F46\u8FD9\u4E9B\u65B9\u6CD5\u6709\u4E0D\u540C\u7684\u53C2\u6570\uFF0C\u5728\u7F16\u8BD1\u671F\u95F4\u5C31\u53EF\u4EE5\u786E\u5B9A\u8C03\u7528\u54EA\u4E2A\u65B9\u6CD5\u3002</p><p>\u8986\u76D6\uFF1A\u8986\u76D6\u662F\u6307\u6D3E\u751F\u7C7B\u91CD\u5199\u57FA\u7C7B\u7684\u65B9\u6CD5\uFF0C\u4F7F\u7528\u57FA\u7C7B\u6307\u5411\u5176\u5B50\u7C7B\u7684\u5B9E\u4F8B\u5BF9\u8C61\uFF0C\u6216\u63A5\u53E3\u7684\u5F15\u7528\u53D8\u91CF\u6307\u5411\u5176\u5B9E\u73B0\u7C7B\u7684\u5B9E\u4F8B\u5BF9\u8C61\uFF0C\u5728\u7A0B\u5E8F\u8C03\u7528\u7684\u8FD0\u884C\u671F\u6839\u636E\u5F15\u7528\u53D8\u91CF\u6240\u6307\u7684\u5177\u4F53\u5B9E\u4F8B\u5BF9\u8C61\u8C03\u7528\u6B63\u5728\u8FD0\u884C\u7684\u90A3\u4E2A\u5BF9\u8C61\u7684\u65B9\u6CD5\uFF0C\u5373\u9700\u8981\u5230\u8FD0\u884C\u671F\u624D\u80FD\u786E\u5B9A\u8C03\u7528\u54EA\u4E2A\u65B9\u6CD5\u3002</p><h3 id="\u91CD\u8F7D\u4E0E\u8986\u76D6\u7684\u533A\u522B" tabindex="-1"><a class="header-anchor" href="#\u91CD\u8F7D\u4E0E\u8986\u76D6\u7684\u533A\u522B" aria-hidden="true">#</a> \u91CD\u8F7D\u4E0E\u8986\u76D6\u7684\u533A\u522B\uFF1F</h3><ul><li>\u8986\u76D6\u662F\u7236\u7C7B\u4E0E\u5B50\u7C7B\u4E4B\u95F4\u7684\u5173\u7CFB\uFF0C\u662F\u5782\u76F4\u5173\u7CFB\uFF1B\u91CD\u8F7D\u662F\u540C\u4E00\u7C7B\u4E2D\u65B9\u6CD5\u4E4B\u95F4\u7684\u5173\u7CFB\uFF0C\u662F\u6C34\u5E73\u5173\u7CFB\u3002</li><li>\u8986\u76D6\u53EA\u80FD\u7531\u4E00\u4E2A\u65B9\u6CD5\u6216\u4E00\u5BF9\u65B9\u6CD5\u4EA7\u751F\u5173\u7CFB\uFF1B\u91CD\u8F7D\u662F\u591A\u4E2A\u65B9\u6CD5\u4E4B\u95F4\u7684\u5173\u7CFB\u3002</li><li>\u8986\u76D6\u8981\u6C42\u53C2\u6570\u5217\u8868\u76F8\u540C\uFF1B\u91CD\u8F7D\u8981\u6C42\u53C2\u6570\u5217\u8868\u4E0D\u540C\u3002</li><li>\u8986\u76D6\u4E2D\uFF0C\u8C03\u7528\u65B9\u6CD5\u4F53\u662F\u6839\u636E\u5BF9\u8C61\u7684\u7C7B\u578B\u6765\u51B3\u5B9A\u7684\uFF0C\u800C\u91CD\u8F7D\u662F\u6839\u636E\u8C03\u7528\u65F6\u5B9E\u53C2\u8868\u4E0E\u5F62\u53C2\u8868\u6765\u5BF9\u5E94\u9009\u62E9\u65B9\u6CD5\u4F53\u3002</li><li>\u91CD\u8F7D\u65B9\u6CD5\u53EF\u4EE5\u6539\u53D8\u8FD4\u56DE\u503C\u7684\u7C7B\u578B\uFF0C\u8986\u76D6\u65B9\u6CD5\u4E0D\u80FD\u6539\u53D8\u8FD4\u56DE\u503C\u7684\u7C7B\u578B\u3002</li></ul><h3 id="\u63A5\u53E3\u548C\u62BD\u8C61\u7C7B\u7684\u76F8\u540C\u70B9\u548C\u4E0D\u540C\u70B9" tabindex="-1"><a class="header-anchor" href="#\u63A5\u53E3\u548C\u62BD\u8C61\u7C7B\u7684\u76F8\u540C\u70B9\u548C\u4E0D\u540C\u70B9" aria-hidden="true">#</a> \u63A5\u53E3\u548C\u62BD\u8C61\u7C7B\u7684\u76F8\u540C\u70B9\u548C\u4E0D\u540C\u70B9\uFF1F</h3><p>\u76F8\u540C\u70B9:</p><ul><li>\u90FD\u4E0D\u80FD\u88AB\u5B9E\u4F8B\u5316\u3002</li><li>\u63A5\u53E3\u7684\u5B9E\u73B0\u7C7B\u6216\u62BD\u8C61\u7C7B\u7684\u5B50\u7C7B\u9700\u5B9E\u73B0\u63A5\u53E3\u6216\u62BD\u8C61\u7C7B\u4E2D\u76F8\u5E94\u7684\u65B9\u6CD5\u624D\u80FD\u88AB\u5B9E\u4F8B\u5316\u3002</li></ul><p>\u4E0D\u540C\u70B9\uFF1A</p><ul><li><p>\u63A5\u53E3\u53EA\u80FD\u6709\u65B9\u6CD5\u5B9A\u4E49\uFF0C\u4E0D\u80FD\u6709\u65B9\u6CD5\u7684\u5B9E\u73B0\uFF0C\u800C\u62BD\u8C61\u7C7B\u53EF\u4EE5\u6709\u65B9\u6CD5\u7684\u5B9A\u4E49\u4E0E\u5B9E\u73B0\u3002</p></li><li><p>\u5B9E\u73B0\u63A5\u53E3\u7684\u5173\u952E\u5B57\u4E3A implements\uFF0C\u7EE7\u627F\u62BD\u8C61\u7C7B\u7684\u5173\u952E\u5B57\u4E3A extends\u3002\u4E00\u4E2A\u7C7B\u53EF\u4EE5\u5B9E\u73B0\u591A\u4E2A\u63A5\u53E3\uFF0C\u53EA\u80FD\u7EE7\u627F\u4E00\u4E2A\u62BD\u8C61\u7C7B\u3002</p></li><li><p>\u5F53\u5B50\u7C7B\u548C\u7236\u7C7B\u4E4B\u95F4\u5B58\u5728\u903B\u8F91\u4E0A\u7684\u5C42\u6B21\u7ED3\u6784\uFF0C\u63A8\u8350\u4F7F\u7528\u62BD\u8C61\u7C7B\uFF0C\u6709\u5229\u4E8E\u529F\u80FD\u7684\u7D2F\u79EF\u3002\u5F53\u529F\u80FD\u4E0D\u9700\u8981\uFF0C\u5E0C\u671B\u652F\u6301\u5DEE\u522B\u8F83\u5927\u7684\u4E24\u4E2A\u6216\u66F4\u591A\u5BF9\u8C61\u95F4\u7684\u7279\u5B9A\u4EA4\u4E92\u884C\u4E3A\uFF0C\u63A8\u8350\u4F7F\u7528\u63A5\u53E3\u3002\u4F7F\u7528\u63A5\u53E3\u80FD\u964D\u4F4E\u8F6F\u4EF6\u7CFB\u7EDF\u7684\u8026\u5408\u5EA6\uFF0C\u4FBF\u4E8E\u65E5\u540E\u7EF4\u62A4\u6216\u6DFB\u52A0\u5220\u9664\u65B9\u6CD5\u3002</p></li></ul><h3 id="\u7B80\u8FF0\u62BD\u8C61\u7C7B\u4E0E\u63A5\u53E3\u7684\u533A\u522B" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0\u62BD\u8C61\u7C7B\u4E0E\u63A5\u53E3\u7684\u533A\u522B" aria-hidden="true">#</a> \u7B80\u8FF0\u62BD\u8C61\u7C7B\u4E0E\u63A5\u53E3\u7684\u533A\u522B</h3><p>\u62BD\u8C61\u7C7B\uFF1A\u4F53\u73B0\u7684\u662F is-a \u7684\u5173\u7CFB\uFF0C\u5982\u5BF9\u4E8E man is a person\uFF0C\u5C31\u53EF\u4EE5\u5C06 person \u5B9A\u4E49\u4E3A\u62BD\u8C61\u7C7B\u3002</p><p>\u63A5\u53E3\uFF1A\u4F53\u73B0\u7684\u662F can \u7684\u5173\u7CFB\u3002\u662F\u4F5C\u4E3A\u6A21\u677F\u5B9E\u73B0\u7684\u3002\u5982\u8BBE\u7F6E\u63A5\u53E3 fly\uFF0Cplane \u7C7B\u548C bird \u7C7B\u5747\u53EF\u5B9E\u73B0\u8BE5\u63A5\u53E3\u3002</p><p>\u4E00\u4E2A\u7C7B\u53EA\u80FD\u7EE7\u627F\u4E00\u4E2A\u62BD\u8C61\u7C7B\uFF0C\u4F46\u53EF\u4EE5\u5B9E\u73B0\u591A\u4E2A\u63A5\u53E3\u3002</p><h3 id="\u7B80\u8FF0\u5185\u90E8\u7C7B\u53CA\u5176\u4F5C\u7528" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0\u5185\u90E8\u7C7B\u53CA\u5176\u4F5C\u7528" aria-hidden="true">#</a> \u7B80\u8FF0\u5185\u90E8\u7C7B\u53CA\u5176\u4F5C\u7528</h3><ul><li>\u6210\u5458\u5185\u90E8\u7C7B\uFF1A\u4F5C\u4E3A\u6210\u5458\u5BF9\u8C61\u7684\u5185\u90E8\u7C7B\u3002\u53EF\u4EE5\u8BBF\u95EE private \u53CA\u4EE5\u4E0A\u5916\u90E8\u7C7B\u7684\u5C5E\u6027\u548C\u65B9\u6CD5\u3002\u5916\u90E8\u7C7B\u60F3\u8981\u8BBF\u95EE\u5185\u90E8\u7C7B\u5C5E\u6027\u6216\u65B9\u6CD5\u65F6\uFF0C\u5FC5\u987B\u8981\u521B\u5EFA\u4E00\u4E2A\u5185\u90E8\u7C7B\u5BF9\u8C61\uFF0C\u7136\u540E\u901A\u8FC7\u8BE5\u5BF9\u8C61\u8BBF\u95EE\u5185\u90E8\u7C7B\u7684\u5C5E\u6027\u6216\u65B9\u6CD5\u3002\u5916\u90E8\u7C7B\u4E5F\u53EF\u8BBF\u95EE private \u4FEE\u9970\u7684\u5185\u90E8\u7C7B\u5C5E\u6027\u3002</li><li>\u5C40\u90E8\u5185\u90E8\u7C7B\uFF1A\u5B58\u5728\u4E8E\u65B9\u6CD5\u4E2D\u7684\u5185\u90E8\u7C7B\u3002\u8BBF\u95EE\u6743\u9650\u7C7B\u4F3C\u5C40\u90E8\u53D8\u91CF\uFF0C\u53EA\u80FD\u8BBF\u95EE\u5916\u90E8\u7C7B\u7684 final \u53D8\u91CF\u3002</li><li>\u533F\u540D\u5185\u90E8\u7C7B\uFF1A\u53EA\u80FD\u4F7F\u7528\u4E00\u6B21\uFF0C\u6CA1\u6709\u7C7B\u540D\uFF0C\u53EA\u80FD\u8BBF\u95EE\u5916\u90E8\u7C7B\u7684 final \u53D8\u91CF\u3002</li><li>\u9759\u6001\u5185\u90E8\u7C7B\uFF1A\u7C7B\u4F3C\u7C7B\u7684\u9759\u6001\u6210\u5458\u53D8\u91CF\u3002</li></ul><h3 id="java-\u8BED\u8A00\u4E2D\u5173\u952E\u5B57-static-\u7684\u4F5C\u7528\u662F\u4EC0\u4E48" tabindex="-1"><a class="header-anchor" href="#java-\u8BED\u8A00\u4E2D\u5173\u952E\u5B57-static-\u7684\u4F5C\u7528\u662F\u4EC0\u4E48" aria-hidden="true">#</a> Java \u8BED\u8A00\u4E2D\u5173\u952E\u5B57 static \u7684\u4F5C\u7528\u662F\u4EC0\u4E48\uFF1F</h3><p>static \u7684\u4E3B\u8981\u4F5C\u7528\u6709\u4E24\u4E2A\uFF1A</p><ul><li>\u4E3A\u67D0\u79CD\u7279\u5B9A\u6570\u636E\u7C7B\u578B\u6216\u5BF9\u8C61\u5206\u914D\u4E0E\u521B\u5EFA\u5BF9\u8C61\u4E2A\u6570\u65E0\u5173\u7684\u5355\u4E00\u7684\u5B58\u50A8\u7A7A\u95F4\u3002</li><li>\u4F7F\u5F97\u67D0\u4E2A\u65B9\u6CD5\u6216\u5C5E\u6027\u4E0E\u7C7B\u800C\u4E0D\u662F\u5BF9\u8C61\u5173\u8054\u5728\u4E00\u8D77\uFF0C\u5373\u5728\u4E0D\u521B\u5EFA\u5BF9\u8C61\u7684\u60C5\u51B5\u4E0B\u53EF\u901A\u8FC7\u7C7B\u76F4\u63A5\u8C03\u7528\u65B9\u6CD5\u6216\u4F7F\u7528\u7C7B\u7684\u5C5E\u6027\u3002</li></ul><p>\u5177\u4F53\u800C\u8A00 static \u53C8\u53EF\u5206\u4E3A 4 \u79CD\u4F7F\u7528\u65B9\u5F0F\uFF1A</p><ul><li>\u4FEE\u9970\u6210\u5458\u53D8\u91CF\u3002\u7528 static \u5173\u952E\u5B57\u4FEE\u9970\u7684\u9759\u6001\u53D8\u91CF\u5728\u5185\u5B58\u4E2D\u53EA\u6709\u4E00\u4E2A\u526F\u672C\u3002\u53EA\u8981\u9759\u6001\u53D8\u91CF\u6240\u5728\u7684\u7C7B\u88AB\u52A0\u8F7D\uFF0C\u8FD9\u4E2A\u9759\u6001\u53D8\u91CF\u5C31\u4F1A\u88AB\u5206\u914D\u7A7A\u95F4\uFF0C\u53EF\u4EE5\u4F7F\u7528\u201C\u7C7B.\u9759\u6001\u53D8\u91CF\u201D\u548C\u201C\u5BF9\u8C61.\u9759\u6001\u53D8\u91CF\u201D\u7684\u65B9\u6CD5\u4F7F\u7528\u3002</li><li>\u4FEE\u9970\u6210\u5458\u65B9\u6CD5\u3002static \u4FEE\u9970\u7684\u65B9\u6CD5\u65E0\u9700\u521B\u5EFA\u5BF9\u8C61\u5C31\u53EF\u4EE5\u88AB\u8C03\u7528\u3002static \u65B9\u6CD5\u4E2D\u4E0D\u80FD\u4F7F\u7528 this \u548C super \u5173\u952E\u5B57\uFF0C\u4E0D\u80FD\u8C03\u7528\u975E static \u65B9\u6CD5\uFF0C\u53EA\u80FD\u8BBF\u95EE\u6240\u5C5E\u7C7B\u7684\u9759\u6001\u6210\u5458\u53D8\u91CF\u548C\u9759\u6001\u6210\u5458\u65B9\u6CD5\u3002</li><li>\u4FEE\u9970\u4EE3\u7801\u5757\u3002JVM \u5728\u52A0\u8F7D\u7C7B\u7684\u65F6\u5019\u4F1A\u6267\u884C static \u4EE3\u7801\u5757\u3002static \u4EE3\u7801\u5757\u5E38\u7528\u4E8E\u521D\u59CB\u5316\u9759\u6001\u53D8\u91CF\u3002static \u4EE3\u7801\u5757\u53EA\u4F1A\u88AB\u6267\u884C\u4E00\u6B21\u3002</li><li>\u4FEE\u9970\u5185\u90E8\u7C7B\u3002static \u5185\u90E8\u7C7B\u53EF\u4EE5\u4E0D\u4F9D\u8D56\u5916\u90E8\u7C7B\u5B9E\u4F8B\u5BF9\u8C61\u800C\u88AB\u5B9E\u4F8B\u5316\u3002\u9759\u6001\u5185\u90E8\u7C7B\u4E0D\u80FD\u4E0E\u5916\u90E8\u7C7B\u6709\u76F8\u540C\u7684\u540D\u5B57\uFF0C\u4E0D\u80FD\u8BBF\u95EE\u666E\u901A\u6210\u5458\u53D8\u91CF\uFF0C\u53EA\u80FD\u8BBF\u95EE\u5916\u90E8\u7C7B\u4E2D\u7684\u9759\u6001\u6210\u5458\u548C\u9759\u6001\u6210\u5458\u65B9\u6CD5\u3002</li></ul><h3 id="\u4E3A\u4EC0\u4E48\u8981\u628A-string-\u8BBE\u8BA1\u4E3A\u4E0D\u53EF\u53D8" tabindex="-1"><a class="header-anchor" href="#\u4E3A\u4EC0\u4E48\u8981\u628A-string-\u8BBE\u8BA1\u4E3A\u4E0D\u53EF\u53D8" aria-hidden="true">#</a> \u4E3A\u4EC0\u4E48\u8981\u628A String \u8BBE\u8BA1\u4E3A\u4E0D\u53EF\u53D8\uFF1F</h3><ul><li>\u8282\u7701\u7A7A\u95F4\uFF1A\u5B57\u7B26\u4E32\u5E38\u91CF\u5B58\u50A8\u5728 JVM \u7684\u5B57\u7B26\u4E32\u6C60\u4E2D\u53EF\u4EE5\u88AB\u7528\u6237\u5171\u4EAB\u3002</li><li>\u63D0\u9AD8\u6548\u7387\uFF1AString \u53EF\u4EE5\u88AB\u4E0D\u540C\u7EBF\u7A0B\u5171\u4EAB\uFF0C\u662F\u7EBF\u7A0B\u5B89\u5168\u7684\u3002\u5728\u6D89\u53CA\u591A\u7EBF\u7A0B\u64CD\u4F5C\u4E2D\u4E0D\u9700\u8981\u540C\u6B65\u64CD\u4F5C\u3002</li><li>\u5B89\u5168\uFF1AString \u5E38\u88AB\u7528\u4E8E\u7528\u6237\u540D\u3001\u5BC6\u7801\u3001\u6587\u4EF6\u540D\u7B49\u4F7F\u7528\uFF0C\u7531\u4E8E\u5176\u4E0D\u53EF\u53D8\uFF0C\u53EF\u907F\u514D\u9ED1\u5BA2\u884C\u4E3A\u5BF9\u5176\u6076\u610F\u4FEE\u6539\u3002</li></ul><h3 id="\u7B80\u8FF0-string-stringbuffer-\u4E0E-stringbuilder" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0-string-stringbuffer-\u4E0E-stringbuilder" aria-hidden="true">#</a> \u7B80\u8FF0 String/StringBuffer \u4E0E StringBuilder</h3><p>String \u7C7B\u91C7\u7528\u5229\u7528 final \u4FEE\u9970\u7684\u5B57\u7B26\u6570\u7EC4\u8FDB\u884C\u5B57\u7B26\u4E32\u4FDD\u5B58\uFF0C\u56E0\u6B64\u4E0D\u53EF\u53D8\u3002\u5982\u679C\u5BF9 String \u7C7B\u578B\u5BF9\u8C61\u4FEE\u6539\uFF0C\u9700\u8981\u65B0\u5EFA\u5BF9\u8C61\uFF0C\u5C06\u8001\u5B57\u7B26\u548C\u65B0\u589E\u52A0\u7684\u5B57\u7B26\u4E00\u5E76\u5B58\u8FDB\u53BB\u3002</p><p>StringBuilder\uFF0C\u91C7\u7528\u65E0 final \u4FEE\u9970\u7684\u5B57\u7B26\u6570\u7EC4\u8FDB\u884C\u4FDD\u5B58\uFF0C\u56E0\u6B64\u53EF\u53D8\u3002\u4F46\u7EBF\u7A0B\u4E0D\u5B89\u5168\u3002</p><p>StringBuffer\uFF0C\u91C7\u7528\u65E0 final \u4FEE\u9970\u7684\u5B57\u7B26\u6570\u7EC4\u8FDB\u884C\u4FDD\u5B58\uFF0C\u53EF\u7406\u89E3\u4E3A\u5B9E\u73B0\u7EBF\u7A0B\u5B89\u5168\u7684 StringBuilder\u3002</p><h3 id="\u5224\u7B49\u8FD0\u7B97\u7B26-\u4E0E-equals-\u7684\u533A\u522B" tabindex="-1"><a class="header-anchor" href="#\u5224\u7B49\u8FD0\u7B97\u7B26-\u4E0E-equals-\u7684\u533A\u522B" aria-hidden="true">#</a> \u5224\u7B49\u8FD0\u7B97\u7B26==\u4E0E equals \u7684\u533A\u522B\uFF1F</h3><p>== \u6BD4\u8F83\u7684\u662F\u5F15\u7528\uFF0Cequals \u6BD4\u8F83\u7684\u662F\u5185\u5BB9\u3002</p><p>\u5982\u679C\u53D8\u91CF\u662F\u57FA\u7840\u6570\u636E\u7C7B\u578B\uFF0C== \u7528\u4E8E\u6BD4\u8F83\u5176\u5BF9\u5E94\u503C\u662F\u5426\u76F8\u7B49\u3002\u5982\u679C\u53D8\u91CF\u6307\u5411\u7684\u662F\u5BF9\u8C61\uFF0C== \u7528\u4E8E\u6BD4\u8F83\u4E24\u4E2A\u5BF9\u8C61\u662F\u5426\u6307\u5411\u540C\u4E00\u5757\u5B58\u50A8\u7A7A\u95F4\u3002</p><p>equals \u662F Object \u7C7B\u63D0\u4F9B\u7684\u65B9\u6CD5\u4E4B\u4E00\uFF0C\u6BCF\u4E2A Java \u7C7B\u90FD\u7EE7\u627F\u81EA Object \u7C7B\uFF0C\u6240\u4EE5\u6BCF\u4E2A\u5BF9\u8C61\u90FD\u5177\u6709 equals \u8FD9\u4E2A\u65B9\u6CD5\u3002Object \u7C7B\u4E2D\u5B9A\u4E49\u7684 equals \u65B9\u6CD5\u5185\u90E8\u662F\u76F4\u63A5\u8C03\u7528 == \u6BD4\u8F83\u5BF9\u8C61\u7684\u3002\u4F46\u901A\u8FC7\u8986\u76D6\u7684\u65B9\u6CD5\u53EF\u4EE5\u8BA9\u5B83\u4E0D\u662F\u6BD4\u8F83\u5F15\u7528\u800C\u662F\u6BD4\u8F83\u6570\u636E\u5185\u5BB9\u3002</p><h3 id="\u7B80\u8FF0-object-\u7C7B\u5E38\u7528\u65B9\u6CD5" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0-object-\u7C7B\u5E38\u7528\u65B9\u6CD5" aria-hidden="true">#</a> \u7B80\u8FF0 Object \u7C7B\u5E38\u7528\u65B9\u6CD5</h3><ul><li>hashCode\uFF1A\u901A\u8FC7\u5BF9\u8C61\u8BA1\u7B97\u51FA\u7684\u6563\u5217\u7801\u3002\u7528\u4E8E map \u578B\u6216 equals \u65B9\u6CD5\u3002\u9700\u8981\u4FDD\u8BC1\u540C\u4E00\u4E2A\u5BF9\u8C61\u591A\u6B21\u8C03\u7528\u8BE5\u65B9\u6CD5\uFF0C\u603B\u8FD4\u56DE\u76F8\u540C\u7684\u6574\u578B\u503C\u3002</li><li>equals\uFF1A\u5224\u65AD\u4E24\u4E2A\u5BF9\u8C61\u662F\u5426\u4E00\u81F4\u3002\u9700\u4FDD\u8BC1 equals \u65B9\u6CD5\u76F8\u540C\u5BF9\u5E94\u7684\u5BF9\u8C61 hashCode \u4E5F\u76F8\u540C\u3002</li><li>toString: \u7528\u5B57\u7B26\u4E32\u8868\u793A\u8BE5\u5BF9\u8C61</li><li>clone:\u6DF1\u62F7\u8D1D\u4E00\u4E2A\u5BF9\u8C61</li></ul><h3 id="java-\u4E2D\u4E00\u7EF4\u6570\u7EC4\u548C\u4E8C\u7EF4\u6570\u7EC4\u7684\u58F0\u660E\u65B9\u5F0F" tabindex="-1"><a class="header-anchor" href="#java-\u4E2D\u4E00\u7EF4\u6570\u7EC4\u548C\u4E8C\u7EF4\u6570\u7EC4\u7684\u58F0\u660E\u65B9\u5F0F" aria-hidden="true">#</a> Java \u4E2D\u4E00\u7EF4\u6570\u7EC4\u548C\u4E8C\u7EF4\u6570\u7EC4\u7684\u58F0\u660E\u65B9\u5F0F\uFF1F</h3><p>\u4E00\u7EF4\u6570\u7EC4\u7684\u58F0\u660E\u65B9\u5F0F\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code>type arrayName<span class="token punctuation">[</span><span class="token punctuation">]</span>
 type<span class="token punctuation">[</span><span class="token punctuation">]</span> arrayName
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><p>\u4E8C\u7EF4\u6570\u7EC4\u7684\u58F0\u660E\u65B9\u5F0F\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code>type arrayName<span class="token punctuation">[</span><span class="token punctuation">]</span><span class="token punctuation">[</span><span class="token punctuation">]</span>
 type<span class="token punctuation">[</span><span class="token punctuation">]</span><span class="token punctuation">[</span><span class="token punctuation">]</span> arrayName
diff --git a/dist/assets/java-mianshi-zhinan.html.e2de50f8.js b/dist/assets/java-mianshi-zhinan.html.9c0ece4d.js
similarity index 99%
rename from dist/assets/java-mianshi-zhinan.html.e2de50f8.js
rename to dist/assets/java-mianshi-zhinan.html.9c0ece4d.js
index 74cdbd47..9bb6d741 100644
--- a/dist/assets/java-mianshi-zhinan.html.e2de50f8.js
+++ b/dist/assets/java-mianshi-zhinan.html.9c0ece4d.js
@@ -1 +1 @@
-import{_ as a}from"./plugin-vue_export-helper.21dcd24c.js";import{o as e,c as t,e as n}from"./app.a0271b9c.js";const r={},i=n('<p>\u5927\u5BB6\u597D\uFF0C\u6211\u662F\u4E8C\u54E5\u5440\u3002</p><p>\u4E00\u5230\u91D1\u4E09\u94F6\u56DB/\u91D1\u4E5D\u94F6\u5341\u7684\u9762\u8BD5\u5B63\u8282\uFF0C\u4E8C\u54E5\u5C31\u5FD9\u5F97\u50CF\u72D7\u4E00\u6837\uFF0C\u56E0\u4E3A\u7ECF\u5E38\u8981\u56DE\u7B54\u5C0F\u4F19\u4F34\u4EEC\u63D0\u51FA\u7684\u9762\u8BD5\u76F8\u5173\u95EE\u9898\uFF0C\u4EE5\u53CA\u4FEE\u6539\u7B80\u5386\u3002</p><p>\u8BF4\u5B9E\u8BDD\uFF0C\u7D2F\u662F\u771F\u7684\u7D2F\uFF0C\u4F46\u6536\u83B7\u4E5F\u662F\u6EE1\u6EE1\u5F53\u5F53\u7684\u3002\u8FD9\u4E0D\uFF0C\u6211\u5C31\u5229\u7528\u4E1A\u4F59\u65F6\u95F4\u6C89\u6DC0\u4E0B\u6765\u4E86\u8FD9\u4EFD\u6C89\u7538\u7538\u7684\u300AJava \u9762\u8BD5\u6307\u5357\u300B\uFF1A</p><ul><li>\u5341\u591A\u7BC7\u6587\u7AE0\u624B\u628A\u624B\u6559\u4F60\u5982\u4F55\u51C6\u5907\u9762\u8BD5\u3002</li><li>\u5168\u9762\u4E14\u786C\u6838\u7684 Java \u9762\u8BD5\u9898\u3002</li><li>\u804C\u573A\u4FEE\u70BC\u624B\u518C\uFF0C\u52A9\u529B\u4F60\u5FEB\u901F\u6210\u4E3A\u516C\u53F8\u4E0D\u53EF\u6216\u7F3A\u7684\u4E00\u5458\u3002</li></ul><h2 id="\u4E00\u3001\u5185\u5BB9\u6982\u89C8" tabindex="-1"><a class="header-anchor" href="#\u4E00\u3001\u5185\u5BB9\u6982\u89C8" aria-hidden="true">#</a> \u4E00\u3001\u5185\u5BB9\u6982\u89C8</h2><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhuanlan/java-mianshi-zhinan-1.png" alt=""></p><h3 id="_01\u3001\u9762\u8BD5\u51C6\u5907\u7BC7" tabindex="-1"><a class="header-anchor" href="#_01\u3001\u9762\u8BD5\u51C6\u5907\u7BC7" aria-hidden="true">#</a> 01\u3001\u9762\u8BD5\u51C6\u5907\u7BC7</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhuanlan/java-mianshi-zhinan-2.png" alt=""></p><p>\u5982\u679C\u4F60\u80FD\u8BA4\u771F\u6309\u7167\u6211\u8FD9\u4EFD\u653B\u7565\u6765\u51C6\u5907\u9762\u8BD5\uFF0C\u90A3\u7EDD\u5BF9\u4E8B\u534A\u529F\u500D\uFF0C\u9762\u8BD5\u53D6\u5F97\u7684\u6218\u679C\u7EDD\u5BF9\u8D85\u51FA\u4F60\u7684\u9884\u671F\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhuanlan/java-mianshi-zhinan-3.png" alt=""></p><h3 id="_02\u3001\u6280\u672F\u9762\u8BD5\u7BC7" tabindex="-1"><a class="header-anchor" href="#_02\u3001\u6280\u672F\u9762\u8BD5\u7BC7" aria-hidden="true">#</a> 02\u3001\u6280\u672F\u9762\u8BD5\u7BC7</h3><p>\u6280\u672F\u9762\u8BD5\u7BC7\u91CC\u4E5F\u4F1A\u7ED9\u5927\u5BB6\u5E26\u6765\u9762\u8BD5\u5F53\u4E2D\u5E38\u89C1\u7684\u95EE\u9898\u89E3\u7B54\uFF0C\u5E2E\u52A9\u4F60\u7684\u9762\u8BD5\u5F53\u4E2D\u83B7\u5F97\u66F4\u4F18\u5F02\u7684\u8868\u73B0\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhuanlan/java-mianshi-zhinan-4.png" alt=""></p><h3 id="_03\u3001\u804C\u573A\u4FEE\u70BC\u7BC7" tabindex="-1"><a class="header-anchor" href="#_03\u3001\u804C\u573A\u4FEE\u70BC\u7BC7" aria-hidden="true">#</a> 03\u3001\u804C\u573A\u4FEE\u70BC\u7BC7</h3><p>\u5F53\u4F60\u53C2\u52A0\u5DE5\u4F5C\u540E\uFF0C\u8BE5\u5982\u4F55\u63D0\u9AD8\u7F16\u7A0B\u80FD\u529B\u3001\u63D0\u9AD8\u5DE5\u4F5C\u8868\u73B0\u3001\u63D0\u9AD8\u4E2A\u4EBA\u786C\u5B9E\u529B\u5462\uFF1F\u804C\u573A\u4FEE\u70BC\u7BC7\u91CC\u4E5F\u4F1A\u7ED9\u5927\u5BB6\u5E26\u6765\u786C\u6838\u7684\u804C\u573A\u5EFA\u8BAE\uFF0C\u5341\u5E74\u591A\u7684\u804C\u573A\u7ECF\u9A8C\u503E\u56CA\u76F8\u6388\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhuanlan/java-mianshi-zhinan-5.png" alt=""></p><h2 id="\u4E8C\u3001\u661F\u7403\u5176\u4ED6\u8D44\u6E90" tabindex="-1"><a class="header-anchor" href="#\u4E8C\u3001\u661F\u7403\u5176\u4ED6\u8D44\u6E90" aria-hidden="true">#</a> \u4E8C\u3001\u661F\u7403\u5176\u4ED6\u8D44\u6E90</h2><p><strong>1. \u514D\u8D39\u4E0B\u8F7D\u6D77\u91CF\u7F16\u7A0B\u5B66\u4E60\u8D44\u6599</strong>\uFF0C\u5305\u62EC\u661F\u4E3B\u4E8C\u54E5\u7684\u539F\u521B\u5B66\u4E60\u8D44\u6599\uFF0C\u6570\u5343\u672C\u4E2A\u65B9\u9762\u7684\u8BA1\u7B97\u673A\u7ECF\u5178\u7535\u5B50\u4E66\uFF0C\u4E3A\u6B64\uFF0C\u4E8C\u54E5\u8FD8\u7279\u610F\u5F00\u901A\u4E86 CSDN \u7684\u4ED8\u8D39\u4E0B\u8F7D\u4F1A\u5458\uFF0C\u53EF\u4EE5\u8BF4\uFF0C\u8FDB\u5165\u661F\u7403\u540E\uFF0C\u51E0\u4E4E\u4E0D\u7528\u518D\u4ECE\u5176\u4ED6\u5730\u65B9\u8D39\u52B2\u627E\u8D44\u6E90\u4E0B\u8F7D\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhuanlan/java-mianshi-zhinan-6.png" alt=""></p><p><strong>2. \u7F16\u7A0B\u55B5\u55B5\u{1F431}\u5B9E\u6218\u9879\u76EE\u624B\u628A\u624B\u6559\uFF0C\u5E26\u4F60\u6210\u4E3A\u4E00\u540D\u516C\u53F8\u4E0D\u53EF\u6216\u7F3A\u7684\u6280\u672F\u5E72\u5C06</strong>\u3002\u6211\u4EEC\u6765\u770B\u4E00\u4E0B\u540E\u7AEF\u7684\u6280\u672F\u6808\u548C\u524D\u7AEF\u7684\u6280\u672F\u6808\uFF0C\u4E3B\u6D41\u6280\u672F\u4E00\u7F51\u6253\u5C3D\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhuanlan/java-mianshi-zhinan-7.png" alt=""></p><ol start="3"><li><p>\u4E00\u5BF9\u4E00\u514D\u8D39\u63D0\u95EE\u4EA4\u6D41\uFF08\u6709\u95EE\u9898\u4F60\u5C3D\u7BA1\u95EE\uFF0C\u56DE\u7B54\u7EDD\u5BF9\u8D70\u5FC3\u5E72\u8D27\uFF0C\u4ECE\u6B64\u4E0D\u518D\u8FF7\u832B\u5F77\u5FA8\uFF09\u3002</p></li><li><p>\u514D\u8D39\u7684\u7B80\u5386\u4FEE\u6539\u670D\u52A1\uFF08\u6BD5\u7ADF\u7B80\u5386\u5C31\u662F\u635E\u9762\u8BD5\u7684\u6572\u95E8\u7816\uFF0C\u4E00\u4EFD\u4F18\u8D28\u7684\u7B80\u5386\u5BF9\u6574\u4E2A\u804C\u4E1A\u751F\u6DAF\u81F3\u5173\u91CD\u8981\uFF09\u3002</p></li><li><p>\u6D77\u91CF\u7F16\u7A0B\u8D44\u6E90\u5206\u4EAB\uFF0C\u62D3\u5C55\u4F60\u7684\u8BA4\u77E5\u8FB9\u754C\uFF0C\u63D0\u9AD8\u4F60\u7684\u7F16\u7A0B\u80FD\u529B\uFF0C\u8BA9\u4F60\u6BCF\u5929\u90FD\u80FD\u8FDB\u6B65\u4EBF\u70B9\u70B9\u3002</p></li><li><p>\u8BFB\u4E66\u4EA4\u6D41\u3001\u5B66\u4E60\u4EA4\u6D41\uFF0C\u8BA9\u6211\u4EEC\u4E00\u8D77\u6784\u5EFA\u4E00\u4E2A\u7EAF\u7CB9\u7684\u5B66\u4E60\u4EA4\u6D41\u793E\u7FA4\u3002</p></li><li><p>\u4E0D\u5B9A\u671F\u798F\u5229\uFF1A\u4FC3\u5B66\u8BA1\u5212\u3001\u8282\u65E5\u62BD\u5956\u3001\u7EB8\u8D28\u4E66/\u4ED8\u8D39\u4E13\u680F\u9001\u9001\u9001\u3002</p></li></ol><h2 id="\u4E09\u3001\u661F\u7403\u9650\u65F6\u4F18\u60E0" tabindex="-1"><a class="header-anchor" href="#\u4E09\u3001\u661F\u7403\u9650\u65F6\u4F18\u60E0" aria-hidden="true">#</a> \u4E09\u3001\u661F\u7403\u9650\u65F6\u4F18\u60E0</h2><p>\u661F\u7403\u7684\u5B9A\u4EF7\u4E3A <strong>99\u5143/\u5E74</strong>\uFF0C\u76EE\u524D\u7B2C\u4E00\u6CE2\u52A0\u5165\u7684\u5C0F\u4F19\u4F34\u9650\u65F6\u4F18\u60E0 <strong>30\u5143</strong>\uFF0C\u53EA\u9700 <strong>69\u5143\u4E00\u5E74</strong>\uFF0C\u540E\u9762\u4F1A\u968F\u7740\u4EBA\u6570\u7684\u589E\u591A\u6301\u7EED\u6DA8\u4EF7\u3002</p><p>\u540D\u989D\u6709\u9650\uFF0C\u5148\u5230\u5148\u5F97\uFF0C<strong>\u4EC5\u9650\u8FD9\u4E00\u6CE2\u5C31\u6062\u590D\u539F\u4EF7</strong>\uFF0C\u8BF7\u957F\u6309\u4E0B\u9762\u7684\u6D77\u62A5\u626B\u7801\u52A0\u5165\uFF08\u65E9\u4E70\u65E9\u4EAB\u53D7\uFF0C\u8FD8\u53EF\u4EE5\u62A2\u5230\u524D\u6392\u7F16\u53F7\uFF09\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/itwanger/zhishixingqiu-youhui30yuan.png" alt=""></p><p>\u900F\u9732\u4E00\u4E2A\u6D88\u606F\uFF0C\u661F\u4E3B\u4E8C\u54E5\u53BB\u5E74\u4E00\u5171\u5728\u670B\u53CB\u5708\u548C\u516C\u4F17\u53F7\u9001\u51FA\u53BB\u4E86\u8FD1 300 \u672C\u7EB8\u8D28\u4E66\uFF08\u6280\u672F\u4E66\u5B9A\u4EF7\u4E00\u822C\u90FD\u662F 100 \u5143\u8D70\u4E0A\uFF09\uFF0C\u4ECA\u5E74\u8BA1\u5212\u5168\u90E8\u4ECE<strong>\u661F\u7403\u5185\u90E8\u9001\uFF0C\u6240\u4EE5\u5E78\u8FD0\u7684\u5C0F\u4F19\u4F34\u76F4\u63A5\u53EF\u4EE5\u767D\u5AD6\u661F\u7403\u4E00\u6574\u5E74</strong>\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhishixingqiu/readme-10.png" alt="\u8FD9\u662F\u4E00\u90E8\u5206\u7684\u8BB0\u5F55\u8868"></p><p>\u8FDB\u5165\u661F\u7403\u540E\uFF0C\u53EF\u4EE5\u4E3A\u81EA\u5DF1\u5236\u5B9A\u4E00\u4E2A\u76EE\u6807\uFF0C\u6BD4\u5982\u8BF4\u591A\u957F\u65F6\u95F4\u5185\u8981\u52A0\u5165\u67D0\u67D0\u5FC3\u4EEA\u7684\u516C\u53F8\uFF0C\u6216\u8005\u8FBE\u6210\u67D0\u67D0\u503C\u5F97\u70AB\u8000\u7684\u6210\u5C31\uFF08\u4E00\u5B9A\u8981\u662F\u8FD8\u7B97\u6709\u70B9\u6311\u6218\u6027\u7684\u76EE\u6807\uFF09\u3002</p><p>\u5982\u679C\u4F60\u80FD\u6309\u671F\u8FBE\u6210\u4F60\u7684\u76EE\u6807\uFF0C\u6211\u4F1A\u5C06\u661F\u7403\u7684\u95E8\u7968\u9000\u8FD8\u7ED9\u4F60\u3002</p><p><strong>\u771F\u8BDA\u6B22\u8FCE\u60F3\u8981\u8FDB\u9636\u63D0\u5347\u7684\u5C0F\u4F19\u4F34\u52A0\u5165\u661F\u7403\u4E00\u8D77\u4EA4\u6D41\uFF0C\u771F\u5FC3\u5E0C\u671B\u80FD\u5E2E\u52A9\u5230\u66F4\u591A\u7684\u5C0F\u4F19\u4F34</strong>\u3002</p><p><strong>\u52A0\u5165\u661F\u7403\u540E\u8BB0\u5F97\u770B\u7F6E\u9876\u4E3B\u9898\uFF0C\u4F60\u4F1A\u53D1\u73B0\u8FD9\u7968\u4EF7\u662F\u771F\u7684\u503C\uFF01</strong></p>',32),p=[i];function h(s,o){return e(),t("div",null,p)}var d=a(r,[["render",h],["__file","java-mianshi-zhinan.html.vue"]]);export{d as default};
+import{_ as a}from"./plugin-vue_export-helper.21dcd24c.js";import{o as e,c as t,e as n}from"./app.615e41d8.js";const r={},i=n('<p>\u5927\u5BB6\u597D\uFF0C\u6211\u662F\u4E8C\u54E5\u5440\u3002</p><p>\u4E00\u5230\u91D1\u4E09\u94F6\u56DB/\u91D1\u4E5D\u94F6\u5341\u7684\u9762\u8BD5\u5B63\u8282\uFF0C\u4E8C\u54E5\u5C31\u5FD9\u5F97\u50CF\u72D7\u4E00\u6837\uFF0C\u56E0\u4E3A\u7ECF\u5E38\u8981\u56DE\u7B54\u5C0F\u4F19\u4F34\u4EEC\u63D0\u51FA\u7684\u9762\u8BD5\u76F8\u5173\u95EE\u9898\uFF0C\u4EE5\u53CA\u4FEE\u6539\u7B80\u5386\u3002</p><p>\u8BF4\u5B9E\u8BDD\uFF0C\u7D2F\u662F\u771F\u7684\u7D2F\uFF0C\u4F46\u6536\u83B7\u4E5F\u662F\u6EE1\u6EE1\u5F53\u5F53\u7684\u3002\u8FD9\u4E0D\uFF0C\u6211\u5C31\u5229\u7528\u4E1A\u4F59\u65F6\u95F4\u6C89\u6DC0\u4E0B\u6765\u4E86\u8FD9\u4EFD\u6C89\u7538\u7538\u7684\u300AJava \u9762\u8BD5\u6307\u5357\u300B\uFF1A</p><ul><li>\u5341\u591A\u7BC7\u6587\u7AE0\u624B\u628A\u624B\u6559\u4F60\u5982\u4F55\u51C6\u5907\u9762\u8BD5\u3002</li><li>\u5168\u9762\u4E14\u786C\u6838\u7684 Java \u9762\u8BD5\u9898\u3002</li><li>\u804C\u573A\u4FEE\u70BC\u624B\u518C\uFF0C\u52A9\u529B\u4F60\u5FEB\u901F\u6210\u4E3A\u516C\u53F8\u4E0D\u53EF\u6216\u7F3A\u7684\u4E00\u5458\u3002</li></ul><h2 id="\u4E00\u3001\u5185\u5BB9\u6982\u89C8" tabindex="-1"><a class="header-anchor" href="#\u4E00\u3001\u5185\u5BB9\u6982\u89C8" aria-hidden="true">#</a> \u4E00\u3001\u5185\u5BB9\u6982\u89C8</h2><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhuanlan/java-mianshi-zhinan-1.png" alt=""></p><h3 id="_01\u3001\u9762\u8BD5\u51C6\u5907\u7BC7" tabindex="-1"><a class="header-anchor" href="#_01\u3001\u9762\u8BD5\u51C6\u5907\u7BC7" aria-hidden="true">#</a> 01\u3001\u9762\u8BD5\u51C6\u5907\u7BC7</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhuanlan/java-mianshi-zhinan-2.png" alt=""></p><p>\u5982\u679C\u4F60\u80FD\u8BA4\u771F\u6309\u7167\u6211\u8FD9\u4EFD\u653B\u7565\u6765\u51C6\u5907\u9762\u8BD5\uFF0C\u90A3\u7EDD\u5BF9\u4E8B\u534A\u529F\u500D\uFF0C\u9762\u8BD5\u53D6\u5F97\u7684\u6218\u679C\u7EDD\u5BF9\u8D85\u51FA\u4F60\u7684\u9884\u671F\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhuanlan/java-mianshi-zhinan-3.png" alt=""></p><h3 id="_02\u3001\u6280\u672F\u9762\u8BD5\u7BC7" tabindex="-1"><a class="header-anchor" href="#_02\u3001\u6280\u672F\u9762\u8BD5\u7BC7" aria-hidden="true">#</a> 02\u3001\u6280\u672F\u9762\u8BD5\u7BC7</h3><p>\u6280\u672F\u9762\u8BD5\u7BC7\u91CC\u4E5F\u4F1A\u7ED9\u5927\u5BB6\u5E26\u6765\u9762\u8BD5\u5F53\u4E2D\u5E38\u89C1\u7684\u95EE\u9898\u89E3\u7B54\uFF0C\u5E2E\u52A9\u4F60\u7684\u9762\u8BD5\u5F53\u4E2D\u83B7\u5F97\u66F4\u4F18\u5F02\u7684\u8868\u73B0\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhuanlan/java-mianshi-zhinan-4.png" alt=""></p><h3 id="_03\u3001\u804C\u573A\u4FEE\u70BC\u7BC7" tabindex="-1"><a class="header-anchor" href="#_03\u3001\u804C\u573A\u4FEE\u70BC\u7BC7" aria-hidden="true">#</a> 03\u3001\u804C\u573A\u4FEE\u70BC\u7BC7</h3><p>\u5F53\u4F60\u53C2\u52A0\u5DE5\u4F5C\u540E\uFF0C\u8BE5\u5982\u4F55\u63D0\u9AD8\u7F16\u7A0B\u80FD\u529B\u3001\u63D0\u9AD8\u5DE5\u4F5C\u8868\u73B0\u3001\u63D0\u9AD8\u4E2A\u4EBA\u786C\u5B9E\u529B\u5462\uFF1F\u804C\u573A\u4FEE\u70BC\u7BC7\u91CC\u4E5F\u4F1A\u7ED9\u5927\u5BB6\u5E26\u6765\u786C\u6838\u7684\u804C\u573A\u5EFA\u8BAE\uFF0C\u5341\u5E74\u591A\u7684\u804C\u573A\u7ECF\u9A8C\u503E\u56CA\u76F8\u6388\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhuanlan/java-mianshi-zhinan-5.png" alt=""></p><h2 id="\u4E8C\u3001\u661F\u7403\u5176\u4ED6\u8D44\u6E90" tabindex="-1"><a class="header-anchor" href="#\u4E8C\u3001\u661F\u7403\u5176\u4ED6\u8D44\u6E90" aria-hidden="true">#</a> \u4E8C\u3001\u661F\u7403\u5176\u4ED6\u8D44\u6E90</h2><p><strong>1. \u514D\u8D39\u4E0B\u8F7D\u6D77\u91CF\u7F16\u7A0B\u5B66\u4E60\u8D44\u6599</strong>\uFF0C\u5305\u62EC\u661F\u4E3B\u4E8C\u54E5\u7684\u539F\u521B\u5B66\u4E60\u8D44\u6599\uFF0C\u6570\u5343\u672C\u4E2A\u65B9\u9762\u7684\u8BA1\u7B97\u673A\u7ECF\u5178\u7535\u5B50\u4E66\uFF0C\u4E3A\u6B64\uFF0C\u4E8C\u54E5\u8FD8\u7279\u610F\u5F00\u901A\u4E86 CSDN \u7684\u4ED8\u8D39\u4E0B\u8F7D\u4F1A\u5458\uFF0C\u53EF\u4EE5\u8BF4\uFF0C\u8FDB\u5165\u661F\u7403\u540E\uFF0C\u51E0\u4E4E\u4E0D\u7528\u518D\u4ECE\u5176\u4ED6\u5730\u65B9\u8D39\u52B2\u627E\u8D44\u6E90\u4E0B\u8F7D\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhuanlan/java-mianshi-zhinan-6.png" alt=""></p><p><strong>2. \u7F16\u7A0B\u55B5\u55B5\u{1F431}\u5B9E\u6218\u9879\u76EE\u624B\u628A\u624B\u6559\uFF0C\u5E26\u4F60\u6210\u4E3A\u4E00\u540D\u516C\u53F8\u4E0D\u53EF\u6216\u7F3A\u7684\u6280\u672F\u5E72\u5C06</strong>\u3002\u6211\u4EEC\u6765\u770B\u4E00\u4E0B\u540E\u7AEF\u7684\u6280\u672F\u6808\u548C\u524D\u7AEF\u7684\u6280\u672F\u6808\uFF0C\u4E3B\u6D41\u6280\u672F\u4E00\u7F51\u6253\u5C3D\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhuanlan/java-mianshi-zhinan-7.png" alt=""></p><ol start="3"><li><p>\u4E00\u5BF9\u4E00\u514D\u8D39\u63D0\u95EE\u4EA4\u6D41\uFF08\u6709\u95EE\u9898\u4F60\u5C3D\u7BA1\u95EE\uFF0C\u56DE\u7B54\u7EDD\u5BF9\u8D70\u5FC3\u5E72\u8D27\uFF0C\u4ECE\u6B64\u4E0D\u518D\u8FF7\u832B\u5F77\u5FA8\uFF09\u3002</p></li><li><p>\u514D\u8D39\u7684\u7B80\u5386\u4FEE\u6539\u670D\u52A1\uFF08\u6BD5\u7ADF\u7B80\u5386\u5C31\u662F\u635E\u9762\u8BD5\u7684\u6572\u95E8\u7816\uFF0C\u4E00\u4EFD\u4F18\u8D28\u7684\u7B80\u5386\u5BF9\u6574\u4E2A\u804C\u4E1A\u751F\u6DAF\u81F3\u5173\u91CD\u8981\uFF09\u3002</p></li><li><p>\u6D77\u91CF\u7F16\u7A0B\u8D44\u6E90\u5206\u4EAB\uFF0C\u62D3\u5C55\u4F60\u7684\u8BA4\u77E5\u8FB9\u754C\uFF0C\u63D0\u9AD8\u4F60\u7684\u7F16\u7A0B\u80FD\u529B\uFF0C\u8BA9\u4F60\u6BCF\u5929\u90FD\u80FD\u8FDB\u6B65\u4EBF\u70B9\u70B9\u3002</p></li><li><p>\u8BFB\u4E66\u4EA4\u6D41\u3001\u5B66\u4E60\u4EA4\u6D41\uFF0C\u8BA9\u6211\u4EEC\u4E00\u8D77\u6784\u5EFA\u4E00\u4E2A\u7EAF\u7CB9\u7684\u5B66\u4E60\u4EA4\u6D41\u793E\u7FA4\u3002</p></li><li><p>\u4E0D\u5B9A\u671F\u798F\u5229\uFF1A\u4FC3\u5B66\u8BA1\u5212\u3001\u8282\u65E5\u62BD\u5956\u3001\u7EB8\u8D28\u4E66/\u4ED8\u8D39\u4E13\u680F\u9001\u9001\u9001\u3002</p></li></ol><h2 id="\u4E09\u3001\u661F\u7403\u9650\u65F6\u4F18\u60E0" tabindex="-1"><a class="header-anchor" href="#\u4E09\u3001\u661F\u7403\u9650\u65F6\u4F18\u60E0" aria-hidden="true">#</a> \u4E09\u3001\u661F\u7403\u9650\u65F6\u4F18\u60E0</h2><p>\u661F\u7403\u7684\u5B9A\u4EF7\u4E3A <strong>99\u5143/\u5E74</strong>\uFF0C\u76EE\u524D\u7B2C\u4E00\u6CE2\u52A0\u5165\u7684\u5C0F\u4F19\u4F34\u9650\u65F6\u4F18\u60E0 <strong>30\u5143</strong>\uFF0C\u53EA\u9700 <strong>69\u5143\u4E00\u5E74</strong>\uFF0C\u540E\u9762\u4F1A\u968F\u7740\u4EBA\u6570\u7684\u589E\u591A\u6301\u7EED\u6DA8\u4EF7\u3002</p><p>\u540D\u989D\u6709\u9650\uFF0C\u5148\u5230\u5148\u5F97\uFF0C<strong>\u4EC5\u9650\u8FD9\u4E00\u6CE2\u5C31\u6062\u590D\u539F\u4EF7</strong>\uFF0C\u8BF7\u957F\u6309\u4E0B\u9762\u7684\u6D77\u62A5\u626B\u7801\u52A0\u5165\uFF08\u65E9\u4E70\u65E9\u4EAB\u53D7\uFF0C\u8FD8\u53EF\u4EE5\u62A2\u5230\u524D\u6392\u7F16\u53F7\uFF09\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/itwanger/zhishixingqiu-youhui30yuan.png" alt=""></p><p>\u900F\u9732\u4E00\u4E2A\u6D88\u606F\uFF0C\u661F\u4E3B\u4E8C\u54E5\u53BB\u5E74\u4E00\u5171\u5728\u670B\u53CB\u5708\u548C\u516C\u4F17\u53F7\u9001\u51FA\u53BB\u4E86\u8FD1 300 \u672C\u7EB8\u8D28\u4E66\uFF08\u6280\u672F\u4E66\u5B9A\u4EF7\u4E00\u822C\u90FD\u662F 100 \u5143\u8D70\u4E0A\uFF09\uFF0C\u4ECA\u5E74\u8BA1\u5212\u5168\u90E8\u4ECE<strong>\u661F\u7403\u5185\u90E8\u9001\uFF0C\u6240\u4EE5\u5E78\u8FD0\u7684\u5C0F\u4F19\u4F34\u76F4\u63A5\u53EF\u4EE5\u767D\u5AD6\u661F\u7403\u4E00\u6574\u5E74</strong>\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhishixingqiu/readme-10.png" alt="\u8FD9\u662F\u4E00\u90E8\u5206\u7684\u8BB0\u5F55\u8868"></p><p>\u8FDB\u5165\u661F\u7403\u540E\uFF0C\u53EF\u4EE5\u4E3A\u81EA\u5DF1\u5236\u5B9A\u4E00\u4E2A\u76EE\u6807\uFF0C\u6BD4\u5982\u8BF4\u591A\u957F\u65F6\u95F4\u5185\u8981\u52A0\u5165\u67D0\u67D0\u5FC3\u4EEA\u7684\u516C\u53F8\uFF0C\u6216\u8005\u8FBE\u6210\u67D0\u67D0\u503C\u5F97\u70AB\u8000\u7684\u6210\u5C31\uFF08\u4E00\u5B9A\u8981\u662F\u8FD8\u7B97\u6709\u70B9\u6311\u6218\u6027\u7684\u76EE\u6807\uFF09\u3002</p><p>\u5982\u679C\u4F60\u80FD\u6309\u671F\u8FBE\u6210\u4F60\u7684\u76EE\u6807\uFF0C\u6211\u4F1A\u5C06\u661F\u7403\u7684\u95E8\u7968\u9000\u8FD8\u7ED9\u4F60\u3002</p><p><strong>\u771F\u8BDA\u6B22\u8FCE\u60F3\u8981\u8FDB\u9636\u63D0\u5347\u7684\u5C0F\u4F19\u4F34\u52A0\u5165\u661F\u7403\u4E00\u8D77\u4EA4\u6D41\uFF0C\u771F\u5FC3\u5E0C\u671B\u80FD\u5E2E\u52A9\u5230\u66F4\u591A\u7684\u5C0F\u4F19\u4F34</strong>\u3002</p><p><strong>\u52A0\u5165\u661F\u7403\u540E\u8BB0\u5F97\u770B\u7F6E\u9876\u4E3B\u9898\uFF0C\u4F60\u4F1A\u53D1\u73B0\u8FD9\u7968\u4EF7\u662F\u771F\u7684\u503C\uFF01</strong></p>',32),p=[i];function h(s,o){return e(),t("div",null,p)}var d=a(r,[["render",h],["__file","java-mianshi-zhinan.html.vue"]]);export{d as default};
diff --git a/dist/assets/java-naming.html.cc154c6b.js b/dist/assets/java-naming.html.1100d2ca.js
similarity index 99%
rename from dist/assets/java-naming.html.cc154c6b.js
rename to dist/assets/java-naming.html.1100d2ca.js
index f69ba053..c938624c 100644
--- a/dist/assets/java-naming.html.cc154c6b.js
+++ b/dist/assets/java-naming.html.1100d2ca.js
@@ -1,4 +1,4 @@
-import{_ as a}from"./plugin-vue_export-helper.21dcd24c.js";import{o as n,c as s,e}from"./app.a0271b9c.js";const i={},l=e(`<h1 id="java\u547D\u540D\u89C4\u8303-\u975E\u5E38\u5168\u9762-\u53EF\u4EE5\u6536\u85CF" tabindex="-1"><a class="header-anchor" href="#java\u547D\u540D\u89C4\u8303-\u975E\u5E38\u5168\u9762-\u53EF\u4EE5\u6536\u85CF" aria-hidden="true">#</a> Java\u547D\u540D\u89C4\u8303\uFF08\u975E\u5E38\u5168\u9762\uFF0C\u53EF\u4EE5\u6536\u85CF\uFF09</h1><p>\u201C\u4E8C\u54E5\uFF0CJava \u4E2D\u7684\u547D\u540D\u7EA6\u5B9A\u90FD\u6709\u54EA\u4E9B\u5462\uFF1F\u201D\u4E09\u59B9\u7684\u8138\u4E0A\u6CDB\u7740\u751C\u751C\u7684\u7B11\u5BB9\uFF0C\u5979\u5F00\u59CB\u5BF9\u63A5\u4E0B\u6765\u8981\u5B66\u4E60\u7684\u5185\u5BB9\u5145\u6EE1\u671F\u5F85\u4E86\uFF0C\u8FD9\u6B63\u662F\u6211\u611F\u5230\u6B23\u6170\u7684\u5730\u65B9\u3002</p><p>\u201C\u5BF9\u4E8E\u6211\u4EEC\u4E2D\u56FD\u4EBA\u6765\u8BF4\uFF0C\u540D\u5B57\u4E5F\u662F\u6709\u8BB2\u7A76\u7684\uFF0C\u6BD4\u5982\u8BF4\u6211\u53EB\u6C89\u9ED8\u738B\u4E8C\uFF0C\u4F60\u5C31\u53EB\u6C89\u9ED8\u738B\u4E09\uFF0C\u54C8\u54C8\u3002\u201D\u6211\u7B11\u7740\u5BF9\u4E09\u59B9\u8BF4\u3002</p><p>\u547D\u540D\u7EA6\u5B9A\u51B3\u5B9A\u6211\u4EEC\u4F7F\u7528\u4EC0\u4E48\u6837\u7684\u6807\u8BC6\u7B26\u6765\u547D\u540D\u5305\u3001\u7C7B\u3001\u5B57\u6BB5\u3001\u65B9\u6CD5\u7B49\u7B49\uFF0C\u867D\u7136\u8FD9\u4E2A\u89C4\u5219\u4E0D\u662F\u5F3A\u5236\u7684\uFF0C\u53EF\u4EE5\u9075\u5B88\uFF0C\u4E5F\u53EF\u4EE5\u4E0D\u9075\u5B88\uFF0C\u4F46\u5982\u679C\u4E0D\u9075\u5B88\u7684\u8BDD\uFF0C\u5C31\u4F1A\u5E26\u6765\u5F88\u591A\u4E0D\u5FC5\u8981\u7684\u9EBB\u70E6\u3002</p><p>\u8D77\u4E2A\u597D\u7684\u540D\u5B57\uFF0C\u5C31\u597D\u50CF\u7A7F\u4E00\u4EF6\u5F97\u4F53\u7684\u8863\u670D\uFF0C\u5448\u73B0\u7ED9\u4EBA\u7684\u7528\u6237\u4F53\u9A8C\u662F\u5B8C\u5168\u4E0D\u4E00\u6837\u7684\u3002</p><p>\u597D\u7684\u547D\u540D\u53EF\u4EE5\u8BA9\u4F60\u7684\u4EE3\u7801\u66F4\u6613\u8BFB\uFF0C\u5305\u62EC\u4F60\u81EA\u5DF1\u548C\u4F60\u7684\u5C0F\u4F19\u4F34\uFF0C\u770B\u4E00\u773C\uFF0C\u4E0D\u7528\u60F3\u592A\u591A\uFF0C\u5C31\u80FD\u660E\u767D\u4EE3\u7801\u662F\u5E72\u561B\u7684\u3002</p><p>\u62FF\u6211\u8FD9\u4E2A\u7B14\u540D\u201C\u6C89\u9ED8\u738B\u4E8C\u201D\u6765\u4E3E\u4F8B\u5427\uFF0C\u8BFB\u8D77\u6765\u6211\u5C31\u89C9\u5F97\u6717\u6717\u4E0A\u53E3\uFF0C\u8BFB\u8005\u770B\u5230\u8FD9\u4E2A\u7B14\u540D\u5C31\u77E5\u9053\u6211\u662F\u4E00\u4E2A\u4EC0\u4E48\u6837\u7684\u4EBA\u2014\u2014\u5BF9\u4E0D\u719F\u7684\u4EBA\u4FDD\u6301\u6C89\u9ED8\uFF0C\u5BF9\u719F\u7684\u4EBA\u5999\u8BED\u8FDE\u73E0\uFF0C\u54C8\u54C8\u3002</p><h3 id="_01\u3001\u5305-package" tabindex="-1"><a class="header-anchor" href="#_01\u3001\u5305-package" aria-hidden="true">#</a> 01\u3001\u5305\uFF08package\uFF09</h3><p>\u5305\u7684\u547D\u540D\u5E94\u8BE5\u9075\u5B88\u4EE5\u4E0B\u89C4\u5219\uFF1A</p><ul><li><p>\u5E94\u8BE5\u5168\u90E8\u662F\u5C0F\u5199\u5B57\u6BCD</p></li><li><p>\u70B9\u5206\u9694\u7B26\u4E4B\u95F4\u6709\u4E14\u4EC5\u6709\u4E00\u4E2A\u81EA\u7136\u8BED\u4E49\u7684\u82F1\u8BED\u5355\u8BCD</p></li><li><p>\u5305\u540D\u7EDF\u4E00\u4F7F\u7528\u5355\u6570\u5F62\u5F0F\uFF0C\u6BD4\u5982\u8BF4 <code>com.itwanger.util</code> \u4E0D\u80FD\u662F <code>com.itwanger.utils</code></p></li><li><p>\u5728\u6700\u65B0\u7684 Java \u7F16\u7A0B\u89C4\u8303\u4E2D\uFF0C\u8981\u6C42\u5F00\u53D1\u4EBA\u5458\u5728\u81EA\u5DF1\u5B9A\u4E49\u7684\u5305\u540D\u524D\u52A0\u4E0A\u552F\u4E00\u7684\u524D\u7F00\u3002\u7531\u4E8E\u4E92\u8054\u7F51\u4E0A\u7684\u57DF\u540D\u662F\u4E0D\u4F1A\u91CD\u590D\u7684\uFF0C\u6240\u4EE5\u591A\u6570\u5F00\u53D1\u4EBA\u5458\u91C7\u7528\u81EA\u5DF1\u516C\u53F8\uFF08\u6216\u8005\u4E2A\u4EBA\u535A\u5BA2\uFF09\u5728\u4E92\u8054\u7F51\u4E0A\u7684\u57DF\u540D\u79F0\u4F5C\u4E3A\u5305\u7684\u552F\u4E00\u524D\u7F00\u3002\u6BD4\u5982\u6211\u6587\u7AE0\u4E2D\u51FA\u73B0\u7684\u4EE3\u7801\u793A\u4F8B\u7684\u5305\u540D\u5C31\u662F <code>package com.itwanger</code>\u3002</p></li></ul><h3 id="_02\u3001\u7C7B-class" tabindex="-1"><a class="header-anchor" href="#_02\u3001\u7C7B-class" aria-hidden="true">#</a> 02\u3001\u7C7B\uFF08class\uFF09</h3><p>\u7C7B\u7684\u547D\u540D\u5E94\u8BE5\u9075\u5B88\u4EE5\u4E0B\u89C4\u5219\uFF1A</p><ul><li><p>\u5FC5\u987B\u4EE5\u5927\u5199\u5B57\u6BCD\u5F00\u5934</p></li><li><p>\u6700\u597D\u662F\u4E00\u4E2A\u540D\u8BCD\uFF0C\u6BD4\u5982\u8BF4 System</p></li><li><p>\u7C7B\u540D\u4F7F\u7528 UpperCamelCase\uFF08\u9A7C\u5CF0\u5F0F\u547D\u540D\uFF09\u98CE\u683C</p></li><li><p>\u5C3D\u91CF\u4E0D\u8981\u7701\u7565\u6210\u5355\u8BCD\u7684\u9996\u5B57\u6BCD\uFF0C\u4F46\u4EE5\u4E0B\u60C5\u5F62\u4F8B\u5916\uFF1ADO/BO/DTO/VO/AO/ PO / UID \u7B49</p></li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/core-grammar/fifteen-01.png" alt=""></p><p>\u53E6\u5916\uFF0C\u5982\u679C\u662F\u62BD\u8C61\u7C7B\u7684\u8BDD\uFF0C\u4F7F\u7528 Abstract \u6216 Base \u5F00\u5934\uFF1B\u5982\u679C\u662F\u5F02\u5E38\u7C7B\u7684\u8BDD\uFF0C\u4F7F\u7528 Exception \u7ED3\u5C3E\uFF1B\u5982\u679C\u662F\u6D4B\u8BD5\u7C7B\u7684\u8BDD\uFF0C\u4F7F\u7528 Test \u7ED3\u5C3E\u3002</p><h3 id="_03\u3001\u63A5\u53E3-interface" tabindex="-1"><a class="header-anchor" href="#_03\u3001\u63A5\u53E3-interface" aria-hidden="true">#</a> 03\u3001\u63A5\u53E3\uFF08interface\uFF09</h3><p>\u63A5\u53E3\u7684\u547D\u540D\u5E94\u8BE5\u9075\u5B88\u4EE5\u4E0B\u89C4\u5219\uFF1A</p><ul><li><p>\u5FC5\u987B\u4EE5\u5927\u5199\u5B57\u6BCD\u5F00\u5934</p></li><li><p>\u6700\u597D\u662F\u4E00\u4E2A\u5F62\u5BB9\u8BCD\uFF0C\u6BD4\u5982\u8BF4 Runnable</p></li><li><p>\u5C3D\u91CF\u4E0D\u8981\u7701\u7565\u6210\u5355\u8BCD\u7684\u9996\u5B57\u6BCD</p></li></ul><p>\u6765\u770B\u4E2A\u4F8B\u5B50\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">interface</span> <span class="token class-name">Printable</span> <span class="token punctuation">{</span><span class="token punctuation">}</span>
+import{_ as a}from"./plugin-vue_export-helper.21dcd24c.js";import{o as n,c as s,e}from"./app.615e41d8.js";const i={},l=e(`<h1 id="java\u547D\u540D\u89C4\u8303-\u975E\u5E38\u5168\u9762-\u53EF\u4EE5\u6536\u85CF" tabindex="-1"><a class="header-anchor" href="#java\u547D\u540D\u89C4\u8303-\u975E\u5E38\u5168\u9762-\u53EF\u4EE5\u6536\u85CF" aria-hidden="true">#</a> Java\u547D\u540D\u89C4\u8303\uFF08\u975E\u5E38\u5168\u9762\uFF0C\u53EF\u4EE5\u6536\u85CF\uFF09</h1><p>\u201C\u4E8C\u54E5\uFF0CJava \u4E2D\u7684\u547D\u540D\u7EA6\u5B9A\u90FD\u6709\u54EA\u4E9B\u5462\uFF1F\u201D\u4E09\u59B9\u7684\u8138\u4E0A\u6CDB\u7740\u751C\u751C\u7684\u7B11\u5BB9\uFF0C\u5979\u5F00\u59CB\u5BF9\u63A5\u4E0B\u6765\u8981\u5B66\u4E60\u7684\u5185\u5BB9\u5145\u6EE1\u671F\u5F85\u4E86\uFF0C\u8FD9\u6B63\u662F\u6211\u611F\u5230\u6B23\u6170\u7684\u5730\u65B9\u3002</p><p>\u201C\u5BF9\u4E8E\u6211\u4EEC\u4E2D\u56FD\u4EBA\u6765\u8BF4\uFF0C\u540D\u5B57\u4E5F\u662F\u6709\u8BB2\u7A76\u7684\uFF0C\u6BD4\u5982\u8BF4\u6211\u53EB\u6C89\u9ED8\u738B\u4E8C\uFF0C\u4F60\u5C31\u53EB\u6C89\u9ED8\u738B\u4E09\uFF0C\u54C8\u54C8\u3002\u201D\u6211\u7B11\u7740\u5BF9\u4E09\u59B9\u8BF4\u3002</p><p>\u547D\u540D\u7EA6\u5B9A\u51B3\u5B9A\u6211\u4EEC\u4F7F\u7528\u4EC0\u4E48\u6837\u7684\u6807\u8BC6\u7B26\u6765\u547D\u540D\u5305\u3001\u7C7B\u3001\u5B57\u6BB5\u3001\u65B9\u6CD5\u7B49\u7B49\uFF0C\u867D\u7136\u8FD9\u4E2A\u89C4\u5219\u4E0D\u662F\u5F3A\u5236\u7684\uFF0C\u53EF\u4EE5\u9075\u5B88\uFF0C\u4E5F\u53EF\u4EE5\u4E0D\u9075\u5B88\uFF0C\u4F46\u5982\u679C\u4E0D\u9075\u5B88\u7684\u8BDD\uFF0C\u5C31\u4F1A\u5E26\u6765\u5F88\u591A\u4E0D\u5FC5\u8981\u7684\u9EBB\u70E6\u3002</p><p>\u8D77\u4E2A\u597D\u7684\u540D\u5B57\uFF0C\u5C31\u597D\u50CF\u7A7F\u4E00\u4EF6\u5F97\u4F53\u7684\u8863\u670D\uFF0C\u5448\u73B0\u7ED9\u4EBA\u7684\u7528\u6237\u4F53\u9A8C\u662F\u5B8C\u5168\u4E0D\u4E00\u6837\u7684\u3002</p><p>\u597D\u7684\u547D\u540D\u53EF\u4EE5\u8BA9\u4F60\u7684\u4EE3\u7801\u66F4\u6613\u8BFB\uFF0C\u5305\u62EC\u4F60\u81EA\u5DF1\u548C\u4F60\u7684\u5C0F\u4F19\u4F34\uFF0C\u770B\u4E00\u773C\uFF0C\u4E0D\u7528\u60F3\u592A\u591A\uFF0C\u5C31\u80FD\u660E\u767D\u4EE3\u7801\u662F\u5E72\u561B\u7684\u3002</p><p>\u62FF\u6211\u8FD9\u4E2A\u7B14\u540D\u201C\u6C89\u9ED8\u738B\u4E8C\u201D\u6765\u4E3E\u4F8B\u5427\uFF0C\u8BFB\u8D77\u6765\u6211\u5C31\u89C9\u5F97\u6717\u6717\u4E0A\u53E3\uFF0C\u8BFB\u8005\u770B\u5230\u8FD9\u4E2A\u7B14\u540D\u5C31\u77E5\u9053\u6211\u662F\u4E00\u4E2A\u4EC0\u4E48\u6837\u7684\u4EBA\u2014\u2014\u5BF9\u4E0D\u719F\u7684\u4EBA\u4FDD\u6301\u6C89\u9ED8\uFF0C\u5BF9\u719F\u7684\u4EBA\u5999\u8BED\u8FDE\u73E0\uFF0C\u54C8\u54C8\u3002</p><h3 id="_01\u3001\u5305-package" tabindex="-1"><a class="header-anchor" href="#_01\u3001\u5305-package" aria-hidden="true">#</a> 01\u3001\u5305\uFF08package\uFF09</h3><p>\u5305\u7684\u547D\u540D\u5E94\u8BE5\u9075\u5B88\u4EE5\u4E0B\u89C4\u5219\uFF1A</p><ul><li><p>\u5E94\u8BE5\u5168\u90E8\u662F\u5C0F\u5199\u5B57\u6BCD</p></li><li><p>\u70B9\u5206\u9694\u7B26\u4E4B\u95F4\u6709\u4E14\u4EC5\u6709\u4E00\u4E2A\u81EA\u7136\u8BED\u4E49\u7684\u82F1\u8BED\u5355\u8BCD</p></li><li><p>\u5305\u540D\u7EDF\u4E00\u4F7F\u7528\u5355\u6570\u5F62\u5F0F\uFF0C\u6BD4\u5982\u8BF4 <code>com.itwanger.util</code> \u4E0D\u80FD\u662F <code>com.itwanger.utils</code></p></li><li><p>\u5728\u6700\u65B0\u7684 Java \u7F16\u7A0B\u89C4\u8303\u4E2D\uFF0C\u8981\u6C42\u5F00\u53D1\u4EBA\u5458\u5728\u81EA\u5DF1\u5B9A\u4E49\u7684\u5305\u540D\u524D\u52A0\u4E0A\u552F\u4E00\u7684\u524D\u7F00\u3002\u7531\u4E8E\u4E92\u8054\u7F51\u4E0A\u7684\u57DF\u540D\u662F\u4E0D\u4F1A\u91CD\u590D\u7684\uFF0C\u6240\u4EE5\u591A\u6570\u5F00\u53D1\u4EBA\u5458\u91C7\u7528\u81EA\u5DF1\u516C\u53F8\uFF08\u6216\u8005\u4E2A\u4EBA\u535A\u5BA2\uFF09\u5728\u4E92\u8054\u7F51\u4E0A\u7684\u57DF\u540D\u79F0\u4F5C\u4E3A\u5305\u7684\u552F\u4E00\u524D\u7F00\u3002\u6BD4\u5982\u6211\u6587\u7AE0\u4E2D\u51FA\u73B0\u7684\u4EE3\u7801\u793A\u4F8B\u7684\u5305\u540D\u5C31\u662F <code>package com.itwanger</code>\u3002</p></li></ul><h3 id="_02\u3001\u7C7B-class" tabindex="-1"><a class="header-anchor" href="#_02\u3001\u7C7B-class" aria-hidden="true">#</a> 02\u3001\u7C7B\uFF08class\uFF09</h3><p>\u7C7B\u7684\u547D\u540D\u5E94\u8BE5\u9075\u5B88\u4EE5\u4E0B\u89C4\u5219\uFF1A</p><ul><li><p>\u5FC5\u987B\u4EE5\u5927\u5199\u5B57\u6BCD\u5F00\u5934</p></li><li><p>\u6700\u597D\u662F\u4E00\u4E2A\u540D\u8BCD\uFF0C\u6BD4\u5982\u8BF4 System</p></li><li><p>\u7C7B\u540D\u4F7F\u7528 UpperCamelCase\uFF08\u9A7C\u5CF0\u5F0F\u547D\u540D\uFF09\u98CE\u683C</p></li><li><p>\u5C3D\u91CF\u4E0D\u8981\u7701\u7565\u6210\u5355\u8BCD\u7684\u9996\u5B57\u6BCD\uFF0C\u4F46\u4EE5\u4E0B\u60C5\u5F62\u4F8B\u5916\uFF1ADO/BO/DTO/VO/AO/ PO / UID \u7B49</p></li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/core-grammar/fifteen-01.png" alt=""></p><p>\u53E6\u5916\uFF0C\u5982\u679C\u662F\u62BD\u8C61\u7C7B\u7684\u8BDD\uFF0C\u4F7F\u7528 Abstract \u6216 Base \u5F00\u5934\uFF1B\u5982\u679C\u662F\u5F02\u5E38\u7C7B\u7684\u8BDD\uFF0C\u4F7F\u7528 Exception \u7ED3\u5C3E\uFF1B\u5982\u679C\u662F\u6D4B\u8BD5\u7C7B\u7684\u8BDD\uFF0C\u4F7F\u7528 Test \u7ED3\u5C3E\u3002</p><h3 id="_03\u3001\u63A5\u53E3-interface" tabindex="-1"><a class="header-anchor" href="#_03\u3001\u63A5\u53E3-interface" aria-hidden="true">#</a> 03\u3001\u63A5\u53E3\uFF08interface\uFF09</h3><p>\u63A5\u53E3\u7684\u547D\u540D\u5E94\u8BE5\u9075\u5B88\u4EE5\u4E0B\u89C4\u5219\uFF1A</p><ul><li><p>\u5FC5\u987B\u4EE5\u5927\u5199\u5B57\u6BCD\u5F00\u5934</p></li><li><p>\u6700\u597D\u662F\u4E00\u4E2A\u5F62\u5BB9\u8BCD\uFF0C\u6BD4\u5982\u8BF4 Runnable</p></li><li><p>\u5C3D\u91CF\u4E0D\u8981\u7701\u7565\u6210\u5355\u8BCD\u7684\u9996\u5B57\u6BCD</p></li></ul><p>\u6765\u770B\u4E2A\u4F8B\u5B50\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">interface</span> <span class="token class-name">Printable</span> <span class="token punctuation">{</span><span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>\u63A5\u53E3\u548C\u5B9E\u73B0\u7C7B\u4E4B\u95F4\u4E5F\u6709\u4E00\u4E9B\u89C4\u5219\uFF1A</p><ul><li><p>\u5B9E\u73B0\u7C7B\u7528 Impl \u7684\u540E\u7F00\u4E0E\u63A5\u53E3\u533A\u522B\uFF0C\u6BD4\u5982\u8BF4 CacheServiceImpl \u5B9E\u73B0 CacheService \u63A5\u53E3</p></li><li><p>\u6216\u8005\uFF0CAbstractTranslator \u5B9E\u73B0 Translatable \u63A5\u53E3</p></li></ul><h3 id="_04\u3001\u5B57\u6BB5-field-\u548C\u53D8\u91CF-variable" tabindex="-1"><a class="header-anchor" href="#_04\u3001\u5B57\u6BB5-field-\u548C\u53D8\u91CF-variable" aria-hidden="true">#</a> 04\u3001\u5B57\u6BB5\uFF08field\uFF09\u548C\u53D8\u91CF\uFF08variable\uFF09</h3><p>\u5B57\u6BB5\u548C\u53D8\u91CF\u7684\u547D\u540D\u5E94\u8BE5\u9075\u5B88\u4EE5\u4E0B\u89C4\u5219\uFF1A</p><ul><li><p>\u5FC5\u987B\u4EE5\u5C0F\u5199\u5B57\u6BCD\u5F00\u5934</p></li><li><p>\u53EF\u4EE5\u5305\u542B\u591A\u4E2A\u5355\u8BCD\uFF0C\u7B2C\u4E00\u4E2A\u5355\u8BCD\u7684\u9996\u5B57\u6BCD\u5C0F\u5199\uFF0C\u5176\u4ED6\u7684\u5355\u8BCD\u9996\u5B57\u6BCD\u5927\u5199\uFF0C\u6BD4\u5982\u8BF4 <code>firstName</code></p></li><li><p>\u6700\u597D\u4E0D\u8981\u4F7F\u7528\u5355\u4E2A\u5B57\u7B26\uFF0C\u6BD4\u5982\u8BF4 <code>int a</code>\uFF0C\u9664\u975E\u662F\u5C40\u90E8\u53D8\u91CF</p></li><li><p>\u7C7B\u578B\u4E0E\u4E2D\u62EC\u53F7\u7D27\u6328\u76F8\u8FDE\u6765\u8868\u793A\u6570\u7EC4\uFF0C\u6BD4\u5982\u8BF4 <code>int[] arrayDemo</code>\uFF0Cmain \u65B9\u6CD5\u4E2D\u5B57\u7B26\u4E32\u6570\u7EC4\u53C2\u6570\u4E0D\u5E94\u8BE5\u5199\u6210 <code>String args[]</code></p></li><li><p>POJO \u7C7B\u4E2D\u7684\u4EFB\u4F55\u5E03\u5C14\u7C7B\u578B\u7684\u53D8\u91CF\uFF0C\u90FD\u4E0D\u8981\u52A0 is \u524D\u7F00\uFF0C\u5426\u5219\u90E8\u5206\u6846\u67B6\u89E3\u6790\u4F1A\u5F15\u8D77\u5E8F\u5217\u5316\u9519\u8BEF\uFF0C\u6211\u81EA\u5DF1\u77E5\u9053\u7684\u6709 fastjson</p></li><li><p>\u907F\u514D\u5728\u5B50\u7C7B\u548C\u7236\u7C7B\u7684\u6210\u5458\u53D8\u91CF\u4E4B\u95F4\u3001\u6216\u8005\u4E0D\u540C\u4EE3\u7801\u5757\u7684\u5C40\u90E8\u53D8\u91CF\u4E4B\u95F4\u91C7\u7528\u5B8C\u5168\u76F8\u540C\u7684\u547D\u540D\uFF0C\u4F7F\u53EF\u7406\u89E3\u6027\u964D\u4F4E\u3002\u5B50\u7C7B\u3001\u7236\u7C7B\u6210\u5458\u53D8\u91CF\u540D\u76F8\u540C\uFF0C\u5373\u4F7F\u662F public \u7C7B\u578B\u7684\u53D8\u91CF\u4E5F\u80FD\u591F\u901A\u8FC7\u7F16\u8BD1\uFF0C\u53E6\u5916\uFF0C\u5C40\u90E8\u53D8\u91CF\u5728\u540C\u4E00\u65B9\u6CD5\u5185\u7684\u4E0D\u540C\u4EE3\u7801\u5757\u4E2D\u540C\u540D\u4E5F\u662F\u5408\u6CD5\u7684\uFF0C\u8FD9\u4E9B\u60C5\u51B5\u90FD\u8981\u907F\u514D\u3002</p></li></ul><p>\u53CD\u4F8B\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">ConfusingName</span> <span class="token punctuation">{</span>
     <span class="token keyword">public</span> <span class="token keyword">int</span> stock<span class="token punctuation">;</span>
 
diff --git a/dist/assets/java-thread.html.52bdf4b1.js b/dist/assets/java-thread.html.87abce4b.js
similarity index 99%
rename from dist/assets/java-thread.html.52bdf4b1.js
rename to dist/assets/java-thread.html.87abce4b.js
index dfd91c70..dd36908a 100644
--- a/dist/assets/java-thread.html.52bdf4b1.js
+++ b/dist/assets/java-thread.html.87abce4b.js
@@ -1 +1 @@
-import{_ as r}from"./plugin-vue_export-helper.21dcd24c.js";import{r as l,o as h,c as n,a as e,b as d,e as t,d as a}from"./app.a0271b9c.js";const o={},c=t('<h1 id="java-\u5E76\u53D1\u7F16\u7A0B\u516B\u80A1\u6587-\u80CC\u8BF5\u7248-\u5FC5\u770B" tabindex="-1"><a class="header-anchor" href="#java-\u5E76\u53D1\u7F16\u7A0B\u516B\u80A1\u6587-\u80CC\u8BF5\u7248-\u5FC5\u770B" aria-hidden="true">#</a> Java \u5E76\u53D1\u7F16\u7A0B\u516B\u80A1\u6587\uFF08\u80CC\u8BF5\u7248\uFF09\u5FC5\u770B\u{1F44D}</h1><h3 id="\u7B80\u8FF0java\u5185\u5B58\u6A21\u578B-jmm" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0java\u5185\u5B58\u6A21\u578B-jmm" aria-hidden="true">#</a> \u7B80\u8FF0Java\u5185\u5B58\u6A21\u578B\uFF08JMM\uFF09</h3><p>Java\u5185\u5B58\u6A21\u578B\u5B9A\u4E49\u4E86\u7A0B\u5E8F\u4E2D\u5404\u79CD\u53D8\u91CF\u7684\u8BBF\u95EE\u89C4\u5219\uFF1A</p><ul><li>\u6240\u6709\u53D8\u91CF\u90FD\u5B58\u50A8\u5728\u4E3B\u5B58\uFF0C\u6BCF\u4E2A\u7EBF\u7A0B\u90FD\u6709\u81EA\u5DF1\u7684\u5DE5\u4F5C\u5185\u5B58\u3002</li><li>\u5DE5\u4F5C\u5185\u5B58\u4E2D\u4FDD\u5B58\u4E86\u88AB\u8BE5\u7EBF\u7A0B\u4F7F\u7528\u7684\u53D8\u91CF\u7684\u4E3B\u5B58\u526F\u672C\uFF0C\u7EBF\u7A0B\u5BF9\u53D8\u91CF\u7684\u6240\u6709\u64CD\u4F5C\u90FD\u5FC5\u987B\u5728\u5DE5\u4F5C\u7A7A\u95F4\u8FDB\u884C\uFF0C\u4E0D\u80FD\u76F4\u63A5\u8BFB\u5199\u4E3B\u5185\u5B58\u6570\u636E\u3002</li><li>\u64CD\u4F5C\u5B8C\u6210\u540E\uFF0C\u7EBF\u7A0B\u7684\u5DE5\u4F5C\u5185\u5B58\u901A\u8FC7\u7F13\u5B58\u4E00\u81F4\u6027\u534F\u8BAE\u5C06\u64CD\u4F5C\u5B8C\u7684\u6570\u636E\u5237\u56DE\u4E3B\u5B58\u3002</li></ul><h3 id="\u7B80\u8FF0as-if-serial" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0as-if-serial" aria-hidden="true">#</a> \u7B80\u8FF0as-if-serial</h3><p>\u7F16\u8BD1\u5668\u4F1A\u5BF9\u539F\u59CB\u7684\u7A0B\u5E8F\u8FDB\u884C\u6307\u4EE4\u91CD\u6392\u5E8F\u548C\u4F18\u5316\u3002\u4F46\u4E0D\u7BA1\u600E\u4E48\u91CD\u6392\u5E8F\uFF0C\u5176\u7ED3\u679C\u90FD\u5FC5\u987B\u548C\u7528\u6237\u539F\u59CB\u7A0B\u5E8F\u8F93\u51FA\u7684\u9884\u5B9A\u7ED3\u679C\u4FDD\u6301\u4E00\u81F4\u3002</p><h3 id="\u7B80\u8FF0happens-before\u516B\u5927\u89C4\u5219" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0happens-before\u516B\u5927\u89C4\u5219" aria-hidden="true">#</a> \u7B80\u8FF0happens-before\u516B\u5927\u89C4\u5219</h3><ul><li>\u7A0B\u5E8F\u6B21\u5E8F\u89C4\u5219\uFF1A\u4E00\u4E2A\u7EBF\u7A0B\u5185\uFF0C\u6309\u7167\u4EE3\u7801\u987A\u5E8F\uFF0C\u4E66\u5199\u5728\u524D\u9762\u7684\u64CD\u4F5C\u5148\u884C\u53D1\u751F\u4E8E\u4E66\u5199\u5728\u540E\u9762\u7684\u64CD\u4F5C\uFF1B</li><li>\u9501\u5B9A\u89C4\u5219\uFF1A\u4E00\u4E2AunLock\u64CD\u4F5C\u5148\u884C\u53D1\u751F\u4E8E\u540E\u9762\u5BF9\u540C\u4E00\u4E2A\u9501\u7684lock\u64CD\u4F5C\uFF1B</li><li>volatile\u53D8\u91CF\u89C4\u5219\uFF1A\u5BF9\u4E00\u4E2A\u53D8\u91CF\u7684\u5199\u64CD\u4F5C\u5148\u884C\u53D1\u751F\u4E8E\u540E\u9762\u5BF9\u8FD9\u4E2A\u53D8\u91CF\u7684\u8BFB\u64CD\u4F5C\uFF1B</li><li>\u4F20\u9012\u89C4\u5219\uFF1A\u5982\u679C\u64CD\u4F5CA\u5148\u884C\u53D1\u751F\u4E8E\u64CD\u4F5CB\uFF0C\u800C\u64CD\u4F5CB\u53C8\u5148\u884C\u53D1\u751F\u4E8E\u64CD\u4F5CC\uFF0C\u5219\u53EF\u4EE5\u5F97\u51FA\u64CD\u4F5CA\u5148\u884C\u53D1\u751F\u4E8E\u64CD\u4F5CC\uFF1B</li><li>\u7EBF\u7A0B\u542F\u52A8\u89C4\u5219\uFF1AThread\u5BF9\u8C61\u7684start()\u65B9\u6CD5\u5148\u884C\u53D1\u751F\u4E8E\u6B64\u7EBF\u7A0B\u7684\u6BCF\u4E2A\u4E00\u4E2A\u52A8\u4F5C\uFF1B</li><li>\u7EBF\u7A0B\u4E2D\u65AD\u89C4\u5219\uFF1A\u5BF9\u7EBF\u7A0Binterrupt()\u65B9\u6CD5\u7684\u8C03\u7528\u5148\u884C\u53D1\u751F\u4E8E\u88AB\u4E2D\u65AD\u7EBF\u7A0B\u7684\u4EE3\u7801\u68C0\u6D4B\u5230\u4E2D\u65AD\u4E8B\u4EF6\u7684\u53D1\u751F\uFF1B</li><li>\u7EBF\u7A0B\u7EC8\u7ED3\u89C4\u5219\uFF1A\u7EBF\u7A0B\u4E2D\u6240\u6709\u7684\u64CD\u4F5C\u90FD\u5148\u884C\u53D1\u751F\u4E8E\u7EBF\u7A0B\u7684\u7EC8\u6B62\u68C0\u6D4B\uFF0C\u6211\u4EEC\u53EF\u4EE5\u901A\u8FC7Thread.join()\u65B9\u6CD5\u7ED3\u675F\u3001Thread.isAlive()\u7684\u8FD4\u56DE\u503C\u624B\u6BB5\u68C0\u6D4B\u5230\u7EBF\u7A0B\u5DF2\u7ECF\u7EC8\u6B62\u6267\u884C\uFF1B</li><li>\u5BF9\u8C61\u7EC8\u7ED3\u89C4\u5219\uFF1A\u4E00\u4E2A\u5BF9\u8C61\u7684\u521D\u59CB\u5316\u5B8C\u6210\u5148\u884C\u53D1\u751F\u4E8E\u4ED6\u7684finalize()\u65B9\u6CD5\u7684\u5F00\u59CB\uFF1B</li></ul><h3 id="as-if-serial-\u548C-happens-before-\u7684\u533A\u522B" tabindex="-1"><a class="header-anchor" href="#as-if-serial-\u548C-happens-before-\u7684\u533A\u522B" aria-hidden="true">#</a> as-if-serial \u548C happens-before \u7684\u533A\u522B</h3><p>as-if-serial \u4FDD\u8BC1\u5355\u7EBF\u7A0B\u7A0B\u5E8F\u7684\u6267\u884C\u7ED3\u679C\u4E0D\u53D8\uFF0Chappens-before \u4FDD\u8BC1\u6B63\u786E\u540C\u6B65\u7684\u591A\u7EBF\u7A0B\u7A0B\u5E8F\u7684\u6267\u884C\u7ED3\u679C\u4E0D\u53D8\u3002</p><h3 id="\u7B80\u8FF0\u539F\u5B50\u6027\u64CD\u4F5C" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0\u539F\u5B50\u6027\u64CD\u4F5C" aria-hidden="true">#</a> \u7B80\u8FF0\u539F\u5B50\u6027\u64CD\u4F5C</h3><p>\u4E00\u4E2A\u64CD\u4F5C\u6216\u8005\u591A\u4E2A\u64CD\u4F5C\uFF0C\u8981\u4E48\u5168\u90E8\u6267\u884C\u5E76\u4E14\u6267\u884C\u7684\u8FC7\u7A0B\u4E0D\u4F1A\u88AB\u4EFB\u4F55\u56E0\u7D20\u6253\u65AD\uFF0C\u8981\u4E48\u5C31\u90FD\u4E0D\u6267\u884C\uFF0C\u8FD9\u5C31\u662F\u539F\u5B50\u6027\u64CD\u4F5C\u3002</p><h3 id="\u7B80\u8FF0\u7EBF\u7A0B\u7684\u53EF\u89C1\u6027" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0\u7EBF\u7A0B\u7684\u53EF\u89C1\u6027" aria-hidden="true">#</a> \u7B80\u8FF0\u7EBF\u7A0B\u7684\u53EF\u89C1\u6027</h3><p>\u53EF\u89C1\u6027\u6307\u5F53\u4E00\u4E2A\u7EBF\u7A0B\u4FEE\u6539\u4E86\u5171\u4EAB\u53D8\u91CF\u65F6\uFF0C\u5176\u4ED6\u7EBF\u7A0B\u80FD\u591F\u7ACB\u5373\u5F97\u77E5\u4FEE\u6539\u3002volatile\u3001synchronized\u3001final \u5173\u952E\u5B57\u90FD\u80FD\u4FDD\u8BC1\u53EF\u89C1\u6027\u3002</p><h3 id="\u7B80\u8FF0\u6709\u5E8F\u6027" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0\u6709\u5E8F\u6027" aria-hidden="true">#</a> \u7B80\u8FF0\u6709\u5E8F\u6027</h3><p>\u867D\u7136\u591A\u7EBF\u7A0B\u5B58\u5728\u5E76\u53D1\u548C\u6307\u4EE4\u4F18\u5316\u7B49\u64CD\u4F5C\uFF0C\u4F46\u5728\u672C\u7EBF\u7A0B\u5185\u89C2\u5BDF\u8BE5\u7EBF\u7A0B\u7684\u6240\u6709\u6267\u884C\u64CD\u4F5C\u662F\u6709\u5E8F\u7684\u3002</p><h3 id="\u7B80\u8FF0java\u4E2Dvolatile\u5173\u952E\u5B57\u4F5C\u7528" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0java\u4E2Dvolatile\u5173\u952E\u5B57\u4F5C\u7528" aria-hidden="true">#</a> \u7B80\u8FF0Java\u4E2Dvolatile\u5173\u952E\u5B57\u4F5C\u7528</h3><ul><li>\u4FDD\u8BC1\u53D8\u91CF\u5BF9\u6240\u6709\u7EBF\u7A0B\u7684\u53EF\u89C1\u6027\u3002\u5F53\u4E00\u4E2A\u7EBF\u7A0B\u4FEE\u6539\u4E86\u53D8\u91CF\u503C\uFF0C\u65B0\u503C\u5BF9\u4E8E\u5176\u4ED6\u7EBF\u7A0B\u6765\u8BF4\u662F\u7ACB\u5373\u53EF\u4EE5\u5F97\u77E5\u7684\u3002</li><li>\u7981\u6B62\u6307\u4EE4\u91CD\u6392\u3002\u4F7F\u7528 volatile \u53D8\u91CF\u8FDB\u884C\u5199\u64CD\u4F5C\uFF0C\u7F16\u8BD1\u5668\u5728\u751F\u6210\u5B57\u8282\u7801\u65F6\uFF0C\u4F1A\u5728\u6307\u4EE4\u5E8F\u5217\u4E2D\u63D2\u5165\u5185\u5B58\u5C4F\u969C\u6765\u7981\u6B62\u7279\u5B9A\u7C7B\u578B\u7684\u5904\u7406\u5668\u8FDB\u884C\u91CD\u6392\u5E8F\u3002</li></ul><h3 id="java\u7EBF\u7A0B\u7684\u5B9E\u73B0\u65B9\u5F0F" tabindex="-1"><a class="header-anchor" href="#java\u7EBF\u7A0B\u7684\u5B9E\u73B0\u65B9\u5F0F" aria-hidden="true">#</a> Java\u7EBF\u7A0B\u7684\u5B9E\u73B0\u65B9\u5F0F</h3><ul><li>\u5B9E\u73B0Runnable\u63A5\u53E3</li><li>\u7EE7\u627FThread\u7C7B</li><li>\u5B9E\u73B0Callable\u63A5\u53E3</li></ul><h3 id="\u7B80\u8FF0java\u7EBF\u7A0B\u7684\u72B6\u6001" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0java\u7EBF\u7A0B\u7684\u72B6\u6001" aria-hidden="true">#</a> \u7B80\u8FF0Java\u7EBF\u7A0B\u7684\u72B6\u6001</h3><p>\u7EBF\u7A0B\u72B6\u6001\u6709 NEW\u3001RUNNABLE\u3001BLOCK\u3001WAITING\u3001TIMED_WAITING\u3001THERMINATED</p><ul><li>NEW\uFF1A\u65B0\u5EFA\u72B6\u6001\uFF0C\u7EBF\u7A0B\u88AB\u521B\u5EFA\u4E14\u672A\u542F\u52A8\uFF0C\u6B64\u65F6\u8FD8\u672A\u8C03\u7528 start \u65B9\u6CD5\u3002</li><li>RUNNABLE\uFF1A\u8FD0\u884C\u72B6\u6001\u3002\u8868\u793A\u7EBF\u7A0B\u6B63\u5728JVM\u4E2D\u6267\u884C\uFF0C\u4F46\u662F\u8FD9\u4E2A\u6267\u884C\uFF0C\u4E0D\u4E00\u5B9A\u771F\u7684\u5728\u8DD1\uFF0C\u4E5F\u53EF\u80FD\u5728\u6392\u961F\u7B49CPU\u3002</li><li>BLOCKED\uFF1A\u963B\u585E\u72B6\u6001\u3002\u7EBF\u7A0B\u7B49\u5F85\u83B7\u53D6\u9501\uFF0C\u9501\u8FD8\u6CA1\u83B7\u5F97\u3002</li><li>WAITING\uFF1A\u7B49\u5F85\u72B6\u6001\u3002\u7EBF\u7A0B\u5185run\u65B9\u6CD5\u6267\u884C\u5B8CObject.wait()/Thread.join()\u8FDB\u5165\u8BE5\u72B6\u6001\u3002</li><li>TIMED_WAITING\uFF1A\u9650\u671F\u7B49\u5F85\u3002\u5728\u4E00\u5B9A\u65F6\u95F4\u4E4B\u540E\u8DF3\u51FA\u72B6\u6001\u3002\u8C03\u7528Thread.sleep(long) Object.wait(long) Thread.join(long)\u8FDB\u5165\u72B6\u6001\u3002\u5176\u4E2D\u8FD9\u4E9B\u53C2\u6570\u4EE3\u8868\u7B49\u5F85\u7684\u65F6\u95F4\u3002</li><li>TERMINATED\uFF1A\u7ED3\u675F\u72B6\u6001\u3002\u7EBF\u7A0B\u8C03\u7528\u5B8Crun\u65B9\u6CD5\u8FDB\u5165\u8BE5\u72B6\u6001\u3002</li></ul><h3 id="\u7B80\u8FF0\u7EBF\u7A0B\u901A\u4FE1\u7684\u65B9\u5F0F" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0\u7EBF\u7A0B\u901A\u4FE1\u7684\u65B9\u5F0F" aria-hidden="true">#</a> \u7B80\u8FF0\u7EBF\u7A0B\u901A\u4FE1\u7684\u65B9\u5F0F</h3><ul><li>volatile \u5173\u952E\u8BCD\u4FEE\u9970\u53D8\u91CF\uFF0C\u4FDD\u8BC1\u6240\u6709\u7EBF\u7A0B\u5BF9\u53D8\u91CF\u8BBF\u95EE\u7684\u53EF\u89C1\u6027\u3002</li><li>synchronized\u5173\u952E\u8BCD\u3002\u786E\u4FDD\u591A\u4E2A\u7EBF\u7A0B\u5728\u540C\u4E00\u65F6\u523B\u53EA\u80FD\u6709\u4E00\u4E2A\u5904\u4E8E\u65B9\u6CD5\u6216\u540C\u6B65\u5757\u4E2D\u3002</li><li>wait/notify\u65B9\u6CD5</li><li>IO\u901A\u4FE1</li></ul><h3 id="\u7B80\u8FF0\u7EBF\u7A0B\u6C60" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0\u7EBF\u7A0B\u6C60" aria-hidden="true">#</a> \u7B80\u8FF0\u7EBF\u7A0B\u6C60</h3><p>\u6CA1\u6709\u7EBF\u7A0B\u6C60\u7684\u60C5\u51B5\u4E0B\uFF0C\u591A\u6B21\u521B\u5EFA\uFF0C\u9500\u6BC1\u7EBF\u7A0B\u5F00\u9500\u6BD4\u8F83\u5927\u3002\u5982\u679C\u5728\u5F00\u8F9F\u7684\u7EBF\u7A0B\u6267\u884C\u5B8C\u5F53\u524D\u4EFB\u52A1\u540E\u590D\u7528\u5DF2\u521B\u5EFA\u7684\u7EBF\u7A0B\uFF0C\u53EF\u4EE5\u964D\u4F4E\u5F00\u9500\u3001\u63A7\u5236\u6700\u5927\u5E76\u53D1\u6570\u3002</p><p>\u7EBF\u7A0B\u6C60\u521B\u5EFA\u7EBF\u7A0B\u65F6\uFF0C\u4F1A\u5C06\u7EBF\u7A0B\u5C01\u88C5\u6210\u5DE5\u4F5C\u7EBF\u7A0B Worker\uFF0CWorker \u5728\u6267\u884C\u5B8C\u4EFB\u52A1\u540E\u8FD8\u4F1A\u5FAA\u73AF\u83B7\u53D6\u5DE5\u4F5C\u961F\u5217\u4E2D\u7684\u4EFB\u52A1\u6765\u6267\u884C\u3002</p><p>\u5C06\u4EFB\u52A1\u6D3E\u53D1\u7ED9\u7EBF\u7A0B\u6C60\u65F6\uFF0C\u4F1A\u51FA\u73B0\u4EE5\u4E0B\u51E0\u79CD\u60C5\u51B5</p><ul><li>\u6838\u5FC3\u7EBF\u7A0B\u6C60\u672A\u6EE1\uFF0C\u521B\u5EFA\u4E00\u4E2A\u65B0\u7684\u7EBF\u7A0B\u6267\u884C\u4EFB\u52A1\u3002</li><li>\u5982\u679C\u6838\u5FC3\u7EBF\u7A0B\u6C60\u5DF2\u6EE1\uFF0C\u5DE5\u4F5C\u961F\u5217\u672A\u6EE1\uFF0C\u5C06\u7EBF\u7A0B\u5B58\u50A8\u5728\u5DE5\u4F5C\u961F\u5217\u3002</li><li>\u5982\u679C\u5DE5\u4F5C\u961F\u5217\u5DF2\u6EE1\uFF0C\u7EBF\u7A0B\u6570\u5C0F\u4E8E\u6700\u5927\u7EBF\u7A0B\u6570\u5C31\u521B\u5EFA\u4E00\u4E2A\u65B0\u7EBF\u7A0B\u5904\u7406\u4EFB\u52A1\u3002</li><li>\u5982\u679C\u8D85\u8FC7\u5927\u5C0F\u7EBF\u7A0B\u6570\uFF0C\u6309\u7167\u62D2\u7EDD\u7B56\u7565\u6765\u5904\u7406\u4EFB\u52A1\u3002</li></ul><p>\u7EBF\u7A0B\u6C60\u53C2\u6570\uFF1A</p><ul><li>corePoolSize\uFF1A\u5E38\u9A7B\u6838\u5FC3\u7EBF\u7A0B\u6570\u3002\u8D85\u8FC7\u8BE5\u503C\u540E\u5982\u679C\u7EBF\u7A0B\u7A7A\u95F2\u4F1A\u88AB\u9500\u6BC1\u3002</li><li>maximumPoolSize\uFF1A\u7EBF\u7A0B\u6C60\u80FD\u591F\u5BB9\u7EB3\u540C\u65F6\u6267\u884C\u7684\u7EBF\u7A0B\u6700\u5927\u6570\u3002</li><li>keepAliveTime\uFF1A\u7EBF\u7A0B\u7A7A\u95F2\u65F6\u95F4\uFF0C\u7EBF\u7A0B\u7A7A\u95F2\u65F6\u95F4\u8FBE\u5230\u8BE5\u503C\u540E\u4F1A\u88AB\u9500\u6BC1\uFF0C\u76F4\u5230\u53EA\u5269\u4E0B corePoolSize \u4E2A\u7EBF\u7A0B\u4E3A\u6B62\uFF0C\u907F\u514D\u6D6A\u8D39\u5185\u5B58\u8D44\u6E90\u3002</li><li>workQueue\uFF1A\u5DE5\u4F5C\u961F\u5217\u3002</li><li>threadFactory\uFF1A\u7EBF\u7A0B\u5DE5\u5382\uFF0C\u7528\u6765\u751F\u4EA7\u4E00\u7EC4\u76F8\u540C\u4EFB\u52A1\u7684\u7EBF\u7A0B\u3002</li><li>handler\uFF1A\u62D2\u7EDD\u7B56\u7565\u3002</li></ul><p>\u62D2\u7EDD\u7B56\u7565\u6709\u4EE5\u4E0B\u51E0\u79CD\uFF1A</p><ul><li>AbortPolicy\uFF1A\u4E22\u5F03\u4EFB\u52A1\u5E76\u629B\u51FA\u5F02\u5E38</li><li>CallerRunsPolicy\uFF1A\u91CD\u65B0\u5C1D\u8BD5\u63D0\u4EA4\u8BE5\u4EFB\u52A1</li><li>DiscardOldestPolicy \u629B\u5F03\u961F\u5217\u91CC\u7B49\u5F85\u6700\u4E45\u7684\u4EFB\u52A1\u5E76\u628A\u5F53\u524D\u4EFB\u52A1\u52A0\u5165\u961F\u5217</li><li>DiscardPolicy \u8868\u793A\u76F4\u63A5\u629B\u5F03\u5F53\u524D\u4EFB\u52A1\u4F46\u4E0D\u629B\u51FA\u5F02\u5E38\u3002</li></ul><h3 id="\u7B80\u8FF0executor\u6846\u67B6" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0executor\u6846\u67B6" aria-hidden="true">#</a> \u7B80\u8FF0Executor\u6846\u67B6</h3><p>Executor\u6846\u67B6\u76EE\u7684\u662F\u5C06\u4EFB\u52A1\u63D0\u4EA4\u548C\u4EFB\u52A1\u5982\u4F55\u8FD0\u884C\u5206\u79BB\u5F00\u6765\u7684\u673A\u5236\u3002\u7528\u6237\u4E0D\u518D\u9700\u8981\u4ECE\u4EE3\u7801\u5C42\u8003\u8651\u8BBE\u8BA1\u4EFB\u52A1\u7684\u63D0\u4EA4\u8FD0\u884C\uFF0C\u53EA\u9700\u8981\u8C03\u7528Executor\u6846\u67B6\u5B9E\u73B0\u7C7B\u7684Execute\u65B9\u6CD5\u5C31\u53EF\u4EE5\u63D0\u4EA4\u4EFB\u52A1\u3002</p><h3 id="\u7B80\u8FF0executor\u7684\u7EE7\u627F\u5173\u7CFB" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0executor\u7684\u7EE7\u627F\u5173\u7CFB" aria-hidden="true">#</a> \u7B80\u8FF0Executor\u7684\u7EE7\u627F\u5173\u7CFB</h3><ul><li>Executor\uFF1A\u4E00\u4E2A\u63A5\u53E3\uFF0C\u5176\u5B9A\u4E49\u4E86\u4E00\u4E2A\u63A5\u6536Runnable\u5BF9\u8C61\u7684\u65B9\u6CD5executor\uFF0C\u8BE5\u65B9\u6CD5\u63A5\u6536\u4E00\u4E2ARunable\u5B9E\u4F8B\u6267\u884C\u8FD9\u4E2A\u4EFB\u52A1\u3002</li><li>ExecutorService\uFF1AExecutor\u7684\u5B50\u7C7B\u63A5\u53E3\uFF0C\u5176\u5B9A\u4E49\u4E86\u4E00\u4E2A\u63A5\u6536Callable\u5BF9\u8C61\u7684\u65B9\u6CD5\uFF0C\u8FD4\u56DE Future \u5BF9\u8C61\uFF0C\u540C\u65F6\u63D0\u4F9Bexecute\u65B9\u6CD5\u3002</li><li>ScheduledExecutorService\uFF1AExecutorService\u7684\u5B50\u7C7B\u63A5\u53E3\uFF0C\u652F\u6301\u5B9A\u671F\u6267\u884C\u4EFB\u52A1\u3002</li><li>AbstractExecutorService\uFF1A\u62BD\u8C61\u7C7B\uFF0C\u63D0\u4F9B ExecutorService \u6267\u884C\u65B9\u6CD5\u7684\u9ED8\u8BA4\u5B9E\u73B0\u3002</li><li>Executors\uFF1A\u5B9E\u73B0ExecutorService\u63A5\u53E3\u7684\u9759\u6001\u5DE5\u5382\u7C7B\uFF0C\u63D0\u4F9B\u4E86\u4E00\u7CFB\u5217\u5DE5\u5382\u65B9\u6CD5\u7528\u4E8E\u521B\u5EFA\u7EBF\u7A0B\u6C60\u3002</li><li>ThreadPoolExecutor\uFF1A\u7EE7\u627FAbstractExecutorService\uFF0C\u7528\u4E8E\u521B\u5EFA\u7EBF\u7A0B\u6C60\u3002</li><li>ForkJoinPool: \u7EE7\u627FAbstractExecutorService\uFF0CFork \u5C06\u5927\u4EFB\u52A1\u5206\u53C9\u4E3A\u591A\u4E2A\u5C0F\u4EFB\u52A1\uFF0C\u7136\u540E\u8BA9\u5C0F\u4EFB\u52A1\u6267\u884C\uFF0CJoin \u662F\u83B7\u5F97\u5C0F\u4EFB\u52A1\u7684\u7ED3\u679C\uFF0C\u7C7B\u4F3C\u4E8Emap reduce\u3002</li><li>ThreadPoolExecutor\uFF1A\u7EE7\u627FThreadPoolExecutor\uFF0C\u5B9E\u73B0ScheduledExecutorService\uFF0C\u7528\u4E8E\u521B\u5EFA\u5E26\u5B9A\u65F6\u4EFB\u52A1\u7684\u7EBF\u7A0B\u6C60\u3002</li></ul><h3 id="\u7B80\u8FF0\u7EBF\u7A0B\u6C60\u7684\u72B6\u6001" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0\u7EBF\u7A0B\u6C60\u7684\u72B6\u6001" aria-hidden="true">#</a> \u7B80\u8FF0\u7EBF\u7A0B\u6C60\u7684\u72B6\u6001</h3><ul><li>Running\uFF1A\u80FD\u63A5\u53D7\u65B0\u63D0\u4EA4\u7684\u4EFB\u52A1\uFF0C\u4E5F\u53EF\u4EE5\u5904\u7406\u963B\u585E\u961F\u5217\u7684\u4EFB\u52A1\u3002</li><li>Shutdown\uFF1A\u4E0D\u518D\u63A5\u53D7\u65B0\u63D0\u4EA4\u7684\u4EFB\u52A1\uFF0C\u4F46\u53EF\u4EE5\u5904\u7406\u5B58\u91CF\u4EFB\u52A1\uFF0C\u7EBF\u7A0B\u6C60\u5904\u4E8Erunning\u65F6\u8C03\u7528shutdown\u65B9\u6CD5\uFF0C\u4F1A\u8FDB\u5165\u8BE5\u72B6\u6001\u3002</li><li>Stop\uFF1A\u4E0D\u63A5\u53D7\u65B0\u4EFB\u52A1\uFF0C\u4E0D\u5904\u7406\u5B58\u91CF\u4EFB\u52A1\uFF0C\u8C03\u7528shutdownnow\u8FDB\u5165\u8BE5\u72B6\u6001\u3002</li><li>Tidying\uFF1A\u6240\u6709\u4EFB\u52A1\u5DF2\u7ECF\u7EC8\u6B62\u4E86\uFF0Cworker_count\uFF08\u6709\u6548\u7EBF\u7A0B\u6570\uFF09\u4E3A0\u3002</li><li>Terminated\uFF1A\u7EBF\u7A0B\u6C60\u5F7B\u5E95\u7EC8\u6B62\u3002\u5728tidying\u6A21\u5F0F\u4E0B\u8C03\u7528terminated\u65B9\u6CD5\u4F1A\u8FDB\u5165\u8BE5\u72B6\u6001\u3002</li></ul><h3 id="\u7B80\u8FF0\u7EBF\u7A0B\u6C60\u7C7B\u578B" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0\u7EBF\u7A0B\u6C60\u7C7B\u578B" aria-hidden="true">#</a> \u7B80\u8FF0\u7EBF\u7A0B\u6C60\u7C7B\u578B</h3><ul><li>newCachedThreadPool \u53EF\u7F13\u5B58\u7EBF\u7A0B\u6C60\uFF0C\u53EF\u8BBE\u7F6E\u6700\u5C0F\u7EBF\u7A0B\u6570\u548C\u6700\u5927\u7EBF\u7A0B\u6570\uFF0C\u7EBF\u7A0B\u7A7A\u95F21\u5206\u949F\u540E\u81EA\u52A8\u9500\u6BC1\u3002</li><li>newFixedThreadPool \u6307\u5B9A\u5DE5\u4F5C\u7EBF\u7A0B\u6570\u91CF\u7EBF\u7A0B\u6C60\u3002</li><li>newSingleThreadExecutor \u5355\u7EBF\u7A0BExecutor\u3002</li><li>newScheduleThreadPool \u652F\u6301\u5B9A\u65F6\u4EFB\u52A1\u7684\u6307\u5B9A\u5DE5\u4F5C\u7EBF\u7A0B\u6570\u91CF\u7EBF\u7A0B\u6C60\u3002</li><li>newSingleThreadScheduledExecutor \u652F\u6301\u5B9A\u65F6\u4EFB\u52A1\u7684\u5355\u7EBF\u7A0BExecutor\u3002</li></ul><h3 id="\u7B80\u8FF0\u963B\u585E\u961F\u5217" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0\u963B\u585E\u961F\u5217" aria-hidden="true">#</a> \u7B80\u8FF0\u963B\u585E\u961F\u5217</h3><p>\u963B\u585E\u961F\u5217\u662F\u751F\u4EA7\u8005\u6D88\u8D39\u8005\u7684\u5B9E\u73B0\u5177\u4F53\u7EC4\u4EF6\u4E4B\u4E00\u3002\u5F53\u963B\u585E\u961F\u5217\u4E3A\u7A7A\u65F6\uFF0C\u4ECE\u961F\u5217\u4E2D\u83B7\u53D6\u5143\u7D20\u7684\u64CD\u4F5C\u5C06\u4F1A\u88AB\u963B\u585E\uFF0C\u5F53\u963B\u585E\u961F\u5217\u6EE1\u4E86\uFF0C\u5F80\u961F\u5217\u6DFB\u52A0\u5143\u7D20\u7684\u64CD\u4F5C\u5C06\u4F1A\u88AB\u963B\u585E\u3002\u5177\u4F53\u5B9E\u73B0\u6709\uFF1A</p><ul><li>ArrayBlockingQueue\uFF1A\u5E95\u5C42\u662F\u7531\u6570\u7EC4\u7EC4\u6210\u7684\u6709\u754C\u963B\u585E\u961F\u5217\u3002</li><li>LinkedBlockingQueue\uFF1A\u5E95\u5C42\u662F\u7531\u94FE\u8868\u7EC4\u6210\u7684\u6709\u754C\u963B\u585E\u961F\u5217\u3002</li><li>PriorityBlockingQueue\uFF1A\u963B\u585E\u4F18\u5148\u961F\u5217\u3002</li><li>DelayQueue\uFF1A\u521B\u5EFA\u5143\u7D20\u65F6\u53EF\u4EE5\u6307\u5B9A\u591A\u4E45\u624D\u80FD\u4ECE\u961F\u5217\u4E2D\u83B7\u53D6\u5F53\u524D\u5143\u7D20</li><li>SynchronousQueue\uFF1A\u4E0D\u5B58\u50A8\u5143\u7D20\u7684\u963B\u585E\u961F\u5217\uFF0C\u6BCF\u4E00\u4E2A\u5B58\u50A8\u5FC5\u987B\u7B49\u5F85\u4E00\u4E2A\u53D6\u51FA\u64CD\u4F5C</li><li>LinkedTransferQueue\uFF1A\u4E0ELinkedBlockingQueue\u76F8\u6BD4\u591A\u4E00\u4E2Atransfer\u65B9\u6CD5\uFF0C\u5373\u5982\u679C\u5F53\u524D\u6709\u6D88\u8D39\u8005\u6B63\u7B49\u5F85\u63A5\u6536\u5143\u7D20\uFF0C\u53EF\u4EE5\u628A\u751F\u4EA7\u8005\u4F20\u5165\u7684\u5143\u7D20\u7ACB\u523B\u4F20\u8F93\u7ED9\u6D88\u8D39\u8005\u3002</li><li>LinkedBlockingDeque\uFF1A\u53CC\u5411\u963B\u585E\u961F\u5217\u3002</li></ul><h3 id="\u8C08\u4E00\u8C08threadlocal" tabindex="-1"><a class="header-anchor" href="#\u8C08\u4E00\u8C08threadlocal" aria-hidden="true">#</a> \u8C08\u4E00\u8C08ThreadLocal</h3><p>ThreadLocal \u662F\u7EBF\u7A0B\u5171\u4EAB\u53D8\u91CF\u3002ThreadLoacl \u6709\u4E00\u4E2A\u9759\u6001\u5185\u90E8\u7C7B ThreadLocalMap\uFF0C\u5176 Key \u662F ThreadLocal \u5BF9\u8C61\uFF0C\u503C\u662F Entry \u5BF9\u8C61\uFF0CThreadLocalMap\u662F\u6BCF\u4E2A\u7EBF\u7A0B\u79C1\u6709\u7684\u3002</p><ul><li>set \u7ED9ThreadLocalMap\u8BBE\u7F6E\u503C\u3002</li><li>get \u83B7\u53D6ThreadLocalMap\u3002</li><li>remove \u5220\u9664ThreadLocalMap\u7C7B\u578B\u7684\u5BF9\u8C61\u3002</li></ul><p>\u5B58\u5728\u7684\u95EE\u9898\uFF1A\u5BF9\u4E8E\u7EBF\u7A0B\u6C60\uFF0C\u7531\u4E8E\u7EBF\u7A0B\u6C60\u4F1A\u91CD\u7528 Thread \u5BF9\u8C61\uFF0C\u56E0\u6B64\u4E0E Thread \u7ED1\u5B9A\u7684 ThreadLocal \u4E5F\u4F1A\u88AB\u91CD\u7528\uFF0C\u9020\u6210\u4E00\u7CFB\u5217\u95EE\u9898\u3002</p><p>\u6BD4\u5982\u8BF4\u5185\u5B58\u6CC4\u6F0F\u3002\u7531\u4E8E ThreadLocal \u662F\u5F31\u5F15\u7528\uFF0C\u4F46 Entry \u7684 value \u662F\u5F3A\u5F15\u7528\uFF0C\u56E0\u6B64\u5F53 ThreadLocal \u88AB\u5783\u573E\u56DE\u6536\u540E\uFF0Cvalue \u4F9D\u65E7\u4E0D\u4F1A\u88AB\u91CA\u653E\uFF0C\u4EA7\u751F\u5185\u5B58\u6CC4\u6F0F\u3002</p><h3 id="\u804A\u804A\u4F60\u5BF9java\u5E76\u53D1\u5305\u4E0Bunsafe\u7C7B\u7684\u7406\u89E3" tabindex="-1"><a class="header-anchor" href="#\u804A\u804A\u4F60\u5BF9java\u5E76\u53D1\u5305\u4E0Bunsafe\u7C7B\u7684\u7406\u89E3" aria-hidden="true">#</a> \u804A\u804A\u4F60\u5BF9Java\u5E76\u53D1\u5305\u4E0Bunsafe\u7C7B\u7684\u7406\u89E3</h3><p>\u5BF9\u4E8E Java \u8BED\u8A00\uFF0C\u6CA1\u6709\u76F4\u63A5\u7684\u6307\u9488\u7EC4\u4EF6\uFF0C\u4E00\u822C\u4E5F\u4E0D\u80FD\u4F7F\u7528\u504F\u79FB\u91CF\u5BF9\u67D0\u5757\u5185\u5B58\u8FDB\u884C\u64CD\u4F5C\u3002\u8FD9\u4E9B\u64CD\u4F5C\u76F8\u5BF9\u6765\u8BB2\u662F\u5B89\u5168\uFF08safe\uFF09\u7684\u3002</p><p>Java \u6709\u4E2A\u7C7B\u53EB Unsafe \u7C7B\uFF0C\u8FD9\u4E2A\u7C7B\u4F7F Java \u62E5\u6709\u4E86\u50CF C \u8BED\u8A00\u7684\u6307\u9488\u4E00\u6837\u64CD\u4F5C\u5185\u5B58\u7A7A\u95F4\u7684\u80FD\u529B\uFF0C\u540C\u65F6\u4E5F\u5E26\u6765\u4E86\u6307\u9488\u7684\u95EE\u9898\u3002\u8FD9\u4E2A\u7C7B\u53EF\u4EE5\u8BF4\u662F Java \u5E76\u53D1\u5F00\u53D1\u7684\u57FA\u7840\u3002</p><h3 id="java\u4E2D\u7684\u4E50\u89C2\u9501\u4E0Ecas\u7B97\u6CD5" tabindex="-1"><a class="header-anchor" href="#java\u4E2D\u7684\u4E50\u89C2\u9501\u4E0Ecas\u7B97\u6CD5" aria-hidden="true">#</a> Java\u4E2D\u7684\u4E50\u89C2\u9501\u4E0ECAS\u7B97\u6CD5</h3><p>\u4E50\u89C2\u9501\u8BA4\u4E3A\u6570\u636E\u53D1\u9001\u65F6\u53D1\u751F\u5E76\u53D1\u51B2\u7A81\u7684\u6982\u7387\u4E0D\u5927\uFF0C\u6240\u4EE5\u8BFB\u64CD\u4F5C\u524D\u4E0D\u4E0A\u9501\u3002</p><p>\u5230\u4E86\u5199\u64CD\u4F5C\u65F6\u624D\u4F1A\u8FDB\u884C\u5224\u65AD\uFF0C\u6570\u636E\u5728\u6B64\u671F\u95F4\u662F\u5426\u88AB\u5176\u4ED6\u7EBF\u7A0B\u4FEE\u6539\u3002\u5982\u679C\u53D1\u751F\u4FEE\u6539\uFF0C\u90A3\u5C31\u8FD4\u56DE\u5199\u5165\u5931\u8D25\uFF1B\u5982\u679C\u6CA1\u6709\u88AB\u4FEE\u6539\uFF0C\u90A3\u5C31\u6267\u884C\u4FEE\u6539\u64CD\u4F5C\uFF0C\u8FD4\u56DE\u4FEE\u6539\u6210\u529F\u3002</p><p>\u4E50\u89C2\u9501\u4E00\u822C\u90FD\u91C7\u7528 Compare And Swap\uFF08CAS\uFF09\u7B97\u6CD5\u8FDB\u884C\u5B9E\u73B0\u3002\u987E\u540D\u601D\u4E49\uFF0C\u8BE5\u7B97\u6CD5\u6D89\u53CA\u5230\u4E86\u4E24\u4E2A\u64CD\u4F5C\uFF0C\u6BD4\u8F83\uFF08Compare\uFF09\u548C\u4EA4\u6362\uFF08Swap\uFF09\u3002</p><p>CAS \u7B97\u6CD5\u7684\u601D\u8DEF\u5982\u4E0B\uFF1A</p><ul><li>\u8BE5\u7B97\u6CD5\u8BA4\u4E3A\u4E0D\u540C\u7EBF\u7A0B\u5BF9\u53D8\u91CF\u7684\u64CD\u4F5C\u65F6\u4EA7\u751F\u7ADE\u4E89\u7684\u60C5\u51B5\u6BD4\u8F83\u5C11\u3002</li><li>\u8BE5\u7B97\u6CD5\u7684\u6838\u5FC3\u662F\u5BF9\u5F53\u524D\u8BFB\u53D6\u53D8\u91CF\u503C E \u548C\u5185\u5B58\u4E2D\u7684\u53D8\u91CF\u65E7\u503C V \u8FDB\u884C\u6BD4\u8F83\u3002</li><li>\u5982\u679C\u76F8\u7B49\uFF0C\u5C31\u4EE3\u8868\u5176\u4ED6\u7EBF\u7A0B\u6CA1\u6709\u5BF9\u8BE5\u53D8\u91CF\u8FDB\u884C\u4FEE\u6539\uFF0C\u5C31\u5C06\u53D8\u91CF\u503C\u66F4\u65B0\u4E3A\u65B0\u503C N\u3002</li><li>\u5982\u679C\u4E0D\u7B49\uFF0C\u5C31\u8BA4\u4E3A\u5728\u8BFB\u53D6\u503C E \u5230\u6BD4\u8F83\u9636\u6BB5\uFF0C\u6709\u5176\u4ED6\u7EBF\u7A0B\u5BF9\u53D8\u91CF\u8FDB\u884C\u8FC7\u4FEE\u6539\uFF0C\u4E0D\u8FDB\u884C\u4EFB\u4F55\u64CD\u4F5C\u3002</li></ul><h3 id="aba\u95EE\u9898\u53CA\u89E3\u51B3\u65B9\u6CD5\u7B80\u8FF0" tabindex="-1"><a class="header-anchor" href="#aba\u95EE\u9898\u53CA\u89E3\u51B3\u65B9\u6CD5\u7B80\u8FF0" aria-hidden="true">#</a> ABA\u95EE\u9898\u53CA\u89E3\u51B3\u65B9\u6CD5\u7B80\u8FF0</h3><p>CAS \u7B97\u6CD5\u662F\u57FA\u4E8E\u503C\u6765\u505A\u6BD4\u8F83\u7684\uFF0C\u5982\u679C\u5F53\u524D\u6709\u4E24\u4E2A\u7EBF\u7A0B\uFF0C\u4E00\u4E2A\u7EBF\u7A0B\u5C06\u53D8\u91CF\u503C\u4ECE A \u6539\u4E3A B \uFF0C\u518D\u7531 B \u6539\u56DE\u4E3A A \uFF0C\u5F53\u524D\u7EBF\u7A0B\u5F00\u59CB\u6267\u884C CAS \u7B97\u6CD5\u65F6\uFF0C\u5C31\u5F88\u5BB9\u6613\u8BA4\u4E3A\u503C\u6CA1\u6709\u53D8\u5316\uFF0C\u8BEF\u8BA4\u4E3A\u8BFB\u53D6\u6570\u636E\u5230\u6267\u884C CAS \u7B97\u6CD5\u7684\u671F\u95F4\uFF0C\u6CA1\u6709\u7EBF\u7A0B\u4FEE\u6539\u8FC7\u6570\u636E\u3002</p><p>juc \u5305\u63D0\u4F9B\u4E86\u4E00\u4E2A AtomicStampedReference\uFF0C\u5373\u5728\u539F\u59CB\u7684\u7248\u672C\u4E0B\u52A0\u5165\u7248\u672C\u53F7\u6233\uFF0C\u89E3\u51B3 ABA \u95EE\u9898\u3002</p><h3 id="\u7B80\u8FF0\u5E38\u89C1\u7684atomic\u7C7B" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0\u5E38\u89C1\u7684atomic\u7C7B" aria-hidden="true">#</a> \u7B80\u8FF0\u5E38\u89C1\u7684Atomic\u7C7B</h3><p>\u5728\u5F88\u591A\u65F6\u5019\uFF0C\u6211\u4EEC\u9700\u8981\u7684\u4EC5\u4EC5\u662F\u4E00\u4E2A\u7B80\u5355\u7684\u3001\u9AD8\u6548\u7684\u3001\u7EBF\u7A0B\u5B89\u5168\u7684++\u6216\u8005--\u65B9\u6848\uFF0C\u4F7F\u7528synchronized\u5173\u952E\u5B57\u548Clock\u56FA\u7136\u53EF\u4EE5\u5B9E\u73B0\uFF0C\u4F46\u4EE3\u4EF7\u6BD4\u8F83\u5927\uFF0C\u6B64\u65F6\u7528\u539F\u5B50\u7C7B\u66F4\u52A0\u65B9\u4FBF\u3002\u57FA\u672C\u6570\u636E\u7C7B\u578B\u7684\u539F\u5B50\u7C7B\u6709\uFF1A</p><ul><li>AtomicInteger \u539F\u5B50\u66F4\u65B0\u6574\u578B</li><li>AtomicLong \u539F\u5B50\u66F4\u65B0\u957F\u6574\u578B</li><li>AtomicBoolean \u539F\u5B50\u66F4\u65B0\u5E03\u5C14\u7C7B\u578B</li></ul><p>Atomic\u6570\u7EC4\u7C7B\u578B\u6709\uFF1A</p><ul><li>AtomicIntegerArray \u539F\u5B50\u66F4\u65B0\u6574\u578B\u6570\u7EC4\u91CC\u7684\u5143\u7D20</li><li>AtomicLongArray \u539F\u5B50\u66F4\u65B0\u957F\u6574\u578B\u6570\u7EC4\u91CC\u7684\u5143\u7D20</li><li>AtomicReferenceArray \u539F\u5B50\u66F4\u65B0\u5F15\u7528\u7C7B\u578B\u6570\u7EC4\u91CC\u7684\u5143\u7D20\u3002</li></ul><p>Atomic\u5F15\u7528\u7C7B\u578B\u6709\uFF1A</p><ul><li>AtomicReference \u539F\u5B50\u66F4\u65B0\u5F15\u7528\u7C7B\u578B</li><li>AtomicMarkableReference \u539F\u5B50\u66F4\u65B0\u5E26\u6709\u6807\u8BB0\u4F4D\u7684\u5F15\u7528\u7C7B\u578B\uFF0C\u53EF\u4EE5\u7ED1\u5B9A\u4E00\u4E2A boolean \u6807\u8BB0</li><li>AtomicStampedReference \u539F\u5B50\u66F4\u65B0\u5E26\u6709\u7248\u672C\u53F7\u7684\u5F15\u7528\u7C7B\u578B</li></ul><p>FieldUpdater\u7C7B\u578B\uFF1A</p><ul><li>AtomicIntegerFieldUpdater \u539F\u5B50\u66F4\u65B0\u6574\u578B\u5B57\u6BB5\u7684\u66F4\u65B0\u5668</li><li>AtomicLongFieldUpdater \u539F\u5B50\u66F4\u65B0\u957F\u6574\u578B\u5B57\u6BB5\u7684\u66F4\u65B0\u5668</li><li>AtomicReferenceFieldUpdater \u539F\u5B50\u66F4\u65B0\u5F15\u7528\u7C7B\u578B\u5B57\u6BB5\u7684\u66F4\u65B0\u5668</li></ul><h3 id="\u7B80\u8FF0atomic\u7C7B\u57FA\u672C\u5B9E\u73B0\u539F\u7406" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0atomic\u7C7B\u57FA\u672C\u5B9E\u73B0\u539F\u7406" aria-hidden="true">#</a> \u7B80\u8FF0Atomic\u7C7B\u57FA\u672C\u5B9E\u73B0\u539F\u7406</h3><p>\u4EE5AtomicIntger \u4E3A\u4F8B\u3002</p><p>\u65B9\u6CD5getAndIncrement\uFF0C\u4EE5\u539F\u5B50\u65B9\u5F0F\u5C06\u5F53\u524D\u7684\u503C\u52A01\uFF0C\u5177\u4F53\u5B9E\u73B0\u4E3A\uFF1A</p><ul><li>\u5728 for \u6B7B\u5FAA\u73AF\u4E2D\u53D6\u5F97 AtomicInteger \u91CC\u5B58\u50A8\u7684\u6570\u503C</li><li>\u5BF9 AtomicInteger \u5F53\u524D\u7684\u503C\u52A0 1</li><li>\u8C03\u7528 compareAndSet \u65B9\u6CD5\u8FDB\u884C\u539F\u5B50\u66F4\u65B0</li><li>\u5148\u68C0\u67E5\u5F53\u524D\u6570\u503C\u662F\u5426\u7B49\u4E8E expect</li><li>\u5982\u679C\u7B49\u4E8E\u5219\u8BF4\u660E\u5F53\u524D\u503C\u6CA1\u6709\u88AB\u5176\u4ED6\u7EBF\u7A0B\u4FEE\u6539\uFF0C\u5219\u5C06\u503C\u66F4\u65B0\u4E3A next\uFF0C</li><li>\u5982\u679C\u4E0D\u662F\u4F1A\u66F4\u65B0\u5931\u8D25\u8FD4\u56DE false\uFF0C\u7A0B\u5E8F\u4F1A\u8FDB\u5165 for \u5FAA\u73AF\u91CD\u65B0\u8FDB\u884C compareAndSet \u64CD\u4F5C\u3002</li></ul><h3 id="\u7B80\u8FF0countdownlatch" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0countdownlatch" aria-hidden="true">#</a> \u7B80\u8FF0CountDownLatch</h3><p>CountDownLatch\u8FD9\u4E2A\u7C7B\u4F7F\u4E00\u4E2A\u7EBF\u7A0B\u7B49\u5F85\u5176\u4ED6\u7EBF\u7A0B\u5404\u81EA\u6267\u884C\u5B8C\u6BD5\u540E\u518D\u6267\u884C\u3002\u662F\u901A\u8FC7\u4E00\u4E2A\u8BA1\u6570\u5668\u6765\u5B9E\u73B0\u7684\uFF0C\u8BA1\u6570\u5668\u7684\u521D\u59CB\u503C\u662F\u7EBF\u7A0B\u7684\u6570\u91CF\u3002\u6BCF\u5F53\u4E00\u4E2A\u7EBF\u7A0B\u6267\u884C\u5B8C\u6BD5\u540E\uFF0C\u8C03\u7528countDown\u65B9\u6CD5\uFF0C\u8BA1\u6570\u5668\u7684\u503C\u5C31\u51CF1\uFF0C\u5F53\u8BA1\u6570\u5668\u7684\u503C\u4E3A0\u65F6\uFF0C\u8868\u793A\u6240\u6709\u7EBF\u7A0B\u90FD\u6267\u884C\u5B8C\u6BD5\uFF0C\u7136\u540E\u5728\u7B49\u5F85\u7684\u7EBF\u7A0B\u5C31\u53EF\u4EE5\u6062\u590D\u5DE5\u4F5C\u4E86\u3002\u53EA\u80FD\u4E00\u6B21\u6027\u4F7F\u7528\uFF0C\u4E0D\u80FDreset\u3002</p><h3 id="\u7B80\u8FF0cyclicbarrier" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0cyclicbarrier" aria-hidden="true">#</a> \u7B80\u8FF0CyclicBarrier</h3><p>CyclicBarrier \u4E3B\u8981\u529F\u80FD\u548CCountDownLatch\u7C7B\u4F3C\uFF0C\u4E5F\u662F\u901A\u8FC7\u4E00\u4E2A\u8BA1\u6570\u5668\uFF0C\u4F7F\u4E00\u4E2A\u7EBF\u7A0B\u7B49\u5F85\u5176\u4ED6\u7EBF\u7A0B\u5404\u81EA\u6267\u884C\u5B8C\u6BD5\u540E\u518D\u6267\u884C\u3002\u4F46\u662F\u5176\u53EF\u4EE5\u91CD\u590D\u4F7F\u7528\uFF08reset\uFF09\u3002</p><h3 id="\u7B80\u8FF0semaphore" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0semaphore" aria-hidden="true">#</a> \u7B80\u8FF0Semaphore</h3><p>Semaphore\u5373\u4FE1\u53F7\u91CF\u3002Semaphore \u7684\u6784\u9020\u65B9\u6CD5\u53C2\u6570\u63A5\u6536\u4E00\u4E2A int \u503C\uFF0C\u8BBE\u7F6E\u4E00\u4E2A\u8BA1\u6570\u5668\uFF0C\u8868\u793A\u53EF\u7528\u7684\u8BB8\u53EF\u6570\u91CF\u5373\u6700\u5927\u5E76\u53D1\u6570\u3002\u4F7F\u7528 acquire \u65B9\u6CD5\u83B7\u5F97\u4E00\u4E2A\u8BB8\u53EF\u8BC1\uFF0C\u8BA1\u6570\u5668\u51CF\u4E00\uFF0C\u4F7F\u7528 release \u65B9\u6CD5\u5F52\u8FD8\u8BB8\u53EF\uFF0C\u8BA1\u6570\u5668\u52A0\u4E00\u3002\u5982\u679C\u6B64\u65F6\u8BA1\u6570\u5668\u503C\u4E3A0\uFF0C\u7EBF\u7A0B\u8FDB\u5165\u4F11\u7720\u3002</p><h3 id="\u7B80\u8FF0exchanger" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0exchanger" aria-hidden="true">#</a> \u7B80\u8FF0Exchanger</h3><p>Exchanger\u7C7B\u53EF\u7528\u4E8E\u4E24\u4E2A\u7EBF\u7A0B\u4E4B\u95F4\u4EA4\u6362\u4FE1\u606F\u3002\u53EF\u7B80\u5355\u5730\u5C06Exchanger\u5BF9\u8C61\u7406\u89E3\u4E3A\u4E00\u4E2A\u5305\u542B\u4E24\u4E2A\u683C\u5B50\u7684\u5BB9\u5668\uFF0C\u901A\u8FC7exchanger\u65B9\u6CD5\u53EF\u4EE5\u5411\u4E24\u4E2A\u683C\u5B50\u4E2D\u586B\u5145\u4FE1\u606F\u3002\u7EBF\u7A0B\u901A\u8FC7exchange \u65B9\u6CD5\u4EA4\u6362\u6570\u636E\uFF0C\u7B2C\u4E00\u4E2A\u7EBF\u7A0B\u6267\u884C exchange \u65B9\u6CD5\u540E\u4F1A\u963B\u585E\u7B49\u5F85\u7B2C\u4E8C\u4E2A\u7EBF\u7A0B\u6267\u884C\u8BE5\u65B9\u6CD5\u3002\u5F53\u4E24\u4E2A\u7EBF\u7A0B\u90FD\u5230\u8FBE\u540C\u6B65\u70B9\u65F6\u8FD9\u4E24\u4E2A\u7EBF\u7A0B\u5C31\u53EF\u4EE5\u4EA4\u6362\u6570\u636E\u5F53\u4E24\u4E2A\u683C\u5B50\u4E2D\u7684\u5747\u88AB\u586B\u5145\u65F6\uFF0C\u8BE5\u5BF9\u8C61\u4F1A\u81EA\u52A8\u5C06\u4E24\u4E2A\u683C\u5B50\u7684\u4FE1\u606F\u4EA4\u6362\uFF0C\u7136\u540E\u8FD4\u56DE\u7ED9\u7EBF\u7A0B\uFF0C\u4ECE\u800C\u5B9E\u73B0\u4E24\u4E2A\u7EBF\u7A0B\u7684\u4FE1\u606F\u4EA4\u6362\u3002</p><h3 id="\u7B80\u8FF0concurrenthashmap" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0concurrenthashmap" aria-hidden="true">#</a> \u7B80\u8FF0ConcurrentHashMap</h3><p>JDK7\u91C7\u7528\u9501\u5206\u6BB5\u6280\u672F\u3002\u9996\u5148\u5C06\u6570\u636E\u5206\u6210 Segment \u6570\u636E\u6BB5\uFF0C\u7136\u540E\u7ED9\u6BCF\u4E00\u4E2A\u6570\u636E\u6BB5\u914D\u4E00\u628A\u9501\uFF0C\u5F53\u4E00\u4E2A\u7EBF\u7A0B\u5360\u7528\u9501\u8BBF\u95EE\u5176\u4E2D\u4E00\u4E2A\u6BB5\u7684\u6570\u636E\u65F6\uFF0C\u5176\u4ED6\u6BB5\u7684\u6570\u636E\u4E5F\u80FD\u88AB\u5176\u4ED6\u7EBF\u7A0B\u8BBF\u95EE\u3002</p><p>get \u9664\u8BFB\u5230\u7A7A\u503C\u4E0D\u9700\u8981\u52A0\u9501\u3002\u8BE5\u65B9\u6CD5\u5148\u7ECF\u8FC7\u4E00\u6B21\u518D\u6563\u5217\uFF0C\u518D\u7528\u8FD9\u4E2A\u6563\u5217\u503C\u901A\u8FC7\u6563\u5217\u8FD0\u7B97\u5B9A\u4F4D\u5230 Segment\uFF0C\u6700\u540E\u901A\u8FC7\u6563\u5217\u7B97\u6CD5\u5B9A\u4F4D\u5230\u5143\u7D20\u3002put \u987B\u52A0\u9501\uFF0C\u9996\u5148\u5B9A\u4F4D\u5230 Segment\uFF0C\u7136\u540E\u8FDB\u884C\u63D2\u5165\u64CD\u4F5C\uFF0C\u7B2C\u4E00\u6B65\u5224\u65AD\u662F\u5426\u9700\u8981\u5BF9 Segment \u91CC\u7684 HashEntry \u6570\u7EC4\u8FDB\u884C\u6269\u5BB9\uFF0C\u7B2C\u4E8C\u6B65\u5B9A\u4F4D\u6DFB\u52A0\u5143\u7D20\u7684\u4F4D\u7F6E\uFF0C\u7136\u540E\u5C06\u5176\u653E\u5165\u6570\u7EC4\u3002</p><p>JDK8\u7684\u6539\u8FDB</p><ul><li>\u53D6\u6D88\u5206\u6BB5\u9501\u673A\u5236\uFF0C\u91C7\u7528CAS\u7B97\u6CD5\u8FDB\u884C\u503C\u7684\u8BBE\u7F6E\uFF0C\u5982\u679CCAS\u5931\u8D25\u518D\u4F7F\u7528 synchronized \u52A0\u9501\u6DFB\u52A0\u5143\u7D20</li><li>\u5F15\u5165\u7EA2\u9ED1\u6811\u7ED3\u6784\uFF0C\u5F53\u67D0\u4E2A\u69FD\u5185\u7684\u5143\u7D20\u4E2A\u6570\u8D85\u8FC78\u4E14 Node\u6570\u7EC4 \u5BB9\u91CF\u5927\u4E8E 64 \u65F6\uFF0C\u94FE\u8868\u8F6C\u4E3A\u7EA2\u9ED1\u6811\u3002</li><li>\u4F7F\u7528\u4E86\u66F4\u52A0\u4F18\u5316\u7684\u65B9\u5F0F\u7EDF\u8BA1\u96C6\u5408\u5185\u7684\u5143\u7D20\u6570\u91CF\u3002</li></ul><h3 id="synchronized\u5E95\u5C42\u5B9E\u73B0\u539F\u7406" tabindex="-1"><a class="header-anchor" href="#synchronized\u5E95\u5C42\u5B9E\u73B0\u539F\u7406" aria-hidden="true">#</a> synchronized\u5E95\u5C42\u5B9E\u73B0\u539F\u7406</h3><p>Java \u5BF9\u8C61\u5E95\u5C42\u90FD\u4F1A\u5173\u8054\u4E00\u4E2A monitor\uFF0C\u4F7F\u7528 synchronized \u65F6 JVM \u4F1A\u6839\u636E\u4F7F\u7528\u73AF\u5883\u627E\u5230\u5BF9\u8C61\u7684 monitor\uFF0C\u6839\u636E monitor \u7684\u72B6\u6001\u8FDB\u884C\u52A0\u89E3\u9501\u7684\u5224\u65AD\u3002\u5982\u679C\u6210\u529F\u52A0\u9501\u5C31\u6210\u4E3A\u8BE5 monitor \u7684\u552F\u4E00\u6301\u6709\u8005\uFF0Cmonitor \u5728\u88AB\u91CA\u653E\u524D\u4E0D\u80FD\u518D\u88AB\u5176\u4ED6\u7EBF\u7A0B\u83B7\u53D6\u3002</p><p>synchronized\u5728JVM\u7F16\u8BD1\u540E\u4F1A\u4EA7\u751Fmonitorenter \u548C monitorexit \u8FD9\u4E24\u4E2A\u5B57\u8282\u7801\u6307\u4EE4\uFF0C\u83B7\u53D6\u548C\u91CA\u653E monitor\u3002\u8FD9\u4E24\u4E2A\u5B57\u8282\u7801\u6307\u4EE4\u90FD\u9700\u8981\u4E00\u4E2A\u5F15\u7528\u7C7B\u578B\u7684\u53C2\u6570\u6307\u660E\u8981\u9501\u5B9A\u548C\u89E3\u9501\u7684\u5BF9\u8C61\uFF0C\u5BF9\u4E8E\u540C\u6B65\u666E\u901A\u65B9\u6CD5\uFF0C\u9501\u662F\u5F53\u524D\u5B9E\u4F8B\u5BF9\u8C61\uFF1B\u5BF9\u4E8E\u9759\u6001\u540C\u6B65\u65B9\u6CD5\uFF0C\u9501\u662F\u5F53\u524D\u7C7B\u7684 Class \u5BF9\u8C61\uFF1B\u5BF9\u4E8E\u540C\u6B65\u65B9\u6CD5\u5757\uFF0C\u9501\u662F synchronized \u62EC\u53F7\u91CC\u7684\u5BF9\u8C61\u3002</p><p>\u6267\u884C monitorenter \u6307\u4EE4\u65F6\uFF0C\u9996\u5148\u5C1D\u8BD5\u83B7\u53D6\u5BF9\u8C61\u9501\u3002\u5982\u679C\u8FD9\u4E2A\u5BF9\u8C61\u6CA1\u6709\u88AB\u9501\u5B9A\uFF0C\u6216\u5F53\u524D\u7EBF\u7A0B\u5DF2\u7ECF\u6301\u6709\u9501\uFF0C\u5C31\u628A\u9501\u7684\u8BA1\u6570\u5668\u52A0 1\uFF0C\u6267\u884C monitorexit \u6307\u4EE4\u65F6\u4F1A\u5C06\u9501\u8BA1\u6570\u5668\u51CF 1\u3002\u4E00\u65E6\u8BA1\u6570\u5668\u4E3A 0 \u9501\u968F\u5373\u5C31\u88AB\u91CA\u653E\u3002</p><h3 id="synchronized\u5173\u952E\u8BCD\u4F7F\u7528\u65B9\u6CD5" tabindex="-1"><a class="header-anchor" href="#synchronized\u5173\u952E\u8BCD\u4F7F\u7528\u65B9\u6CD5" aria-hidden="true">#</a> synchronized\u5173\u952E\u8BCD\u4F7F\u7528\u65B9\u6CD5</h3><ul><li>\u76F4\u63A5\u4FEE\u9970\u67D0\u4E2A\u5B9E\u4F8B\u65B9\u6CD5</li><li>\u76F4\u63A5\u4FEE\u9970\u67D0\u4E2A\u9759\u6001\u65B9\u6CD5</li><li>\u4FEE\u9970\u4EE3\u7801\u5757</li></ul><h3 id="\u7B80\u8FF0java\u504F\u5411\u9501" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0java\u504F\u5411\u9501" aria-hidden="true">#</a> \u7B80\u8FF0Java\u504F\u5411\u9501</h3><p>JDK 1.6 \u4E2D\u63D0\u51FA\u4E86\u504F\u5411\u9501\u7684\u6982\u5FF5\u3002\u8BE5\u9501\u63D0\u51FA\u7684\u539F\u56E0\u662F\uFF0C\u5F00\u53D1\u8005\u53D1\u73B0\u591A\u6570\u60C5\u51B5\u4E0B\u9501\u5E76\u4E0D\u5B58\u5728\u7ADE\u4E89\uFF0C\u4E00\u628A\u9501\u5F80\u5F80\u662F\u7531\u540C\u4E00\u4E2A\u7EBF\u7A0B\u83B7\u5F97\u7684\u3002\u504F\u5411\u9501\u5E76\u4E0D\u4F1A\u4E3B\u52A8\u91CA\u653E\uFF0C\u8FD9\u6837\u6BCF\u6B21\u504F\u5411\u9501\u8FDB\u5165\u7684\u65F6\u5019\u90FD\u4F1A\u5224\u65AD\u8BE5\u8D44\u6E90\u662F\u5426\u662F\u504F\u5411\u81EA\u5DF1\u7684\uFF0C\u5982\u679C\u662F\u504F\u5411\u81EA\u5DF1\u7684\u5219\u4E0D\u9700\u8981\u8FDB\u884C\u989D\u5916\u7684\u64CD\u4F5C\uFF0C\u76F4\u63A5\u53EF\u4EE5\u8FDB\u5165\u540C\u6B65\u64CD\u4F5C\u3002</p><p>\u5176\u7533\u8BF7\u6D41\u7A0B\u4E3A\uFF1A</p><ul><li>\u9996\u5148\u9700\u8981\u5224\u65AD\u5BF9\u8C61\u7684 Mark Word \u662F\u5426\u5C5E\u4E8E\u504F\u5411\u6A21\u5F0F\uFF0C\u5982\u679C\u4E0D\u5C5E\u4E8E\uFF0C\u90A3\u5C31\u8FDB\u5165\u8F7B\u91CF\u7EA7\u9501\u5224\u65AD\u903B\u8F91\u3002\u5426\u5219\u7EE7\u7EED\u4E0B\u4E00\u6B65\u5224\u65AD\uFF1B</li><li>\u5224\u65AD\u76EE\u524D\u8BF7\u6C42\u9501\u7684\u7EBF\u7A0B ID \u662F\u5426\u548C\u504F\u5411\u9501\u672C\u8EAB\u8BB0\u5F55\u7684\u7EBF\u7A0B ID \u4E00\u81F4\u3002\u5982\u679C\u4E00\u81F4\uFF0C\u7EE7\u7EED\u4E0B\u4E00\u6B65\u7684\u5224\u65AD\uFF0C\u5982\u679C\u4E0D\u4E00\u81F4\uFF0C\u8DF3\u8F6C\u5230\u6B65\u9AA44\uFF1B</li><li>\u5224\u65AD\u662F\u5426\u9700\u8981\u91CD\u504F\u5411\u3002\u5982\u679C\u4E0D\u7528\u7684\u8BDD\uFF0C\u76F4\u63A5\u83B7\u5F97\u504F\u5411\u9501\uFF1B</li><li>\u5229\u7528 CAS \u7B97\u6CD5\u5C06\u5BF9\u8C61\u7684 Mark Word \u8FDB\u884C\u66F4\u6539\uFF0C\u4F7F\u7EBF\u7A0B ID \u90E8\u5206\u6362\u6210\u672C\u7EBF\u7A0B ID\u3002\u5982\u679C\u66F4\u6362\u6210\u529F\uFF0C\u5219\u91CD\u504F\u5411\u5B8C\u6210\uFF0C\u83B7\u5F97\u504F\u5411\u9501\u3002\u5982\u679C\u5931\u8D25\uFF0C\u5219\u8BF4\u660E\u6709\u591A\u7EBF\u7A0B\u7ADE\u4E89\uFF0C\u5347\u7EA7\u4E3A\u8F7B\u91CF\u7EA7\u9501\u3002</li></ul><h3 id="\u7B80\u8FF0\u8F7B\u91CF\u7EA7\u9501" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0\u8F7B\u91CF\u7EA7\u9501" aria-hidden="true">#</a> \u7B80\u8FF0\u8F7B\u91CF\u7EA7\u9501</h3><p>\u8F7B\u91CF\u7EA7\u9501\u662F\u4E3A\u4E86\u5728\u6CA1\u6709\u7ADE\u4E89\u7684\u524D\u63D0\u4E0B\u51CF\u5C11\u91CD\u91CF\u7EA7\u9501\u51FA\u73B0\u5E76\u5BFC\u81F4\u7684\u6027\u80FD\u6D88\u8017\u3002</p><p>\u5176\u7533\u8BF7\u6D41\u7A0B\u4E3A\uFF1A</p><ul><li>\u5982\u679C\u540C\u6B65\u5BF9\u8C61\u6CA1\u6709\u88AB\u9501\u5B9A\uFF0C\u865A\u62DF\u673A\u5C06\u5728\u5F53\u524D\u7EBF\u7A0B\u7684\u6808\u5E27\u4E2D\u5EFA\u7ACB\u4E00\u4E2A\u9501\u8BB0\u5F55\u7A7A\u95F4\uFF0C\u5B58\u50A8\u9501\u5BF9\u8C61\u76EE\u524D Mark Word \u7684\u62F7\u8D1D\u3002</li><li>\u865A\u62DF\u673A\u4F7F\u7528 CAS \u5C1D\u8BD5\u628A\u5BF9\u8C61\u7684 Mark Word \u66F4\u65B0\u4E3A\u6307\u5411\u9501\u8BB0\u5F55\u7684\u6307\u9488</li><li>\u5982\u679C\u66F4\u65B0\u6210\u529F\u5373\u4EE3\u8868\u8BE5\u7EBF\u7A0B\u62E5\u6709\u4E86\u9501\uFF0C\u9501\u6807\u5FD7\u4F4D\u5C06\u8F6C\u53D8\u4E3A 00\uFF0C\u8868\u793A\u5904\u4E8E\u8F7B\u91CF\u7EA7\u9501\u5B9A\u72B6\u6001\u3002</li><li>\u5982\u679C\u66F4\u65B0\u5931\u8D25\u5C31\u610F\u5473\u7740\u81F3\u5C11\u5B58\u5728\u4E00\u6761\u7EBF\u7A0B\u4E0E\u5F53\u524D\u7EBF\u7A0B\u7ADE\u4E89\u3002\u865A\u62DF\u673A\u68C0\u67E5\u5BF9\u8C61\u7684 Mark Word \u662F\u5426\u6307\u5411\u5F53\u524D\u7EBF\u7A0B\u7684\u6808\u5E27</li><li>\u5982\u679C\u6307\u5411\u5F53\u524D\u7EBF\u7A0B\u7684\u6808\u5E27\uFF0C\u8BF4\u660E\u5F53\u524D\u7EBF\u7A0B\u5DF2\u7ECF\u62E5\u6709\u4E86\u9501\uFF0C\u76F4\u63A5\u8FDB\u5165\u540C\u6B65\u5757\u7EE7\u7EED\u6267\u884C</li><li>\u5982\u679C\u4E0D\u662F\u5219\u8BF4\u660E\u9501\u5BF9\u8C61\u5DF2\u7ECF\u88AB\u5176\u4ED6\u7EBF\u7A0B\u62A2\u5360\u3002</li><li>\u5982\u679C\u51FA\u73B0\u4E24\u6761\u4EE5\u4E0A\u7EBF\u7A0B\u4E89\u7528\u540C\u4E00\u4E2A\u9501\uFF0C\u8F7B\u91CF\u7EA7\u9501\u5C31\u4E0D\u518D\u6709\u6548\uFF0C\u5C06\u81A8\u80C0\u4E3A\u91CD\u91CF\u7EA7\u9501\uFF0C\u9501\u6807\u5FD7\u72B6\u6001\u53D8\u4E3A 10\uFF0C\u6B64\u65F6Mark Word \u5B58\u50A8\u7684\u5C31\u662F\u6307\u5411\u91CD\u91CF\u7EA7\u9501\u7684\u6307\u9488\uFF0C\u540E\u9762\u7B49\u5F85\u9501\u7684\u7EBF\u7A0B\u4E5F\u5FC5\u987B\u963B\u585E\u3002</li></ul><h3 id="\u7B80\u8FF0\u9501\u4F18\u5316\u7B56\u7565" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0\u9501\u4F18\u5316\u7B56\u7565" aria-hidden="true">#</a> \u7B80\u8FF0\u9501\u4F18\u5316\u7B56\u7565</h3><p>\u5373\u81EA\u9002\u5E94\u81EA\u65CB\u3001\u9501\u6D88\u9664\u3001\u9501\u7C97\u5316\u3001\u9501\u5347\u7EA7\u7B49\u7B56\u7565\u504F\u3002</p><h3 id="\u7B80\u8FF0java\u7684\u81EA\u65CB\u9501" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0java\u7684\u81EA\u65CB\u9501" aria-hidden="true">#</a> \u7B80\u8FF0Java\u7684\u81EA\u65CB\u9501</h3><p>\u7EBF\u7A0B\u83B7\u53D6\u9501\u5931\u8D25\u540E\uFF0C\u53EF\u4EE5\u91C7\u7528\u8FD9\u6837\u7684\u7B56\u7565\uFF0C\u53EF\u4EE5\u4E0D\u653E\u5F03 CPU \uFF0C\u4E0D\u505C\u7684\u91CD\u8BD5\u5185\u91CD\u8BD5\uFF0C\u8FD9\u79CD\u64CD\u4F5C\u4E5F\u79F0\u4E3A\u81EA\u65CB\u9501\u3002</p><h3 id="\u7B80\u8FF0\u81EA\u9002\u5E94\u81EA\u65CB\u9501" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0\u81EA\u9002\u5E94\u81EA\u65CB\u9501" aria-hidden="true">#</a> \u7B80\u8FF0\u81EA\u9002\u5E94\u81EA\u65CB\u9501</h3><p>\u81EA\u9002\u5E94\u81EA\u65CB\u9501\u81EA\u65CB\u6B21\u6570\u4E0D\u518D\u4EBA\u4E3A\u8BBE\u5B9A\uFF0C\u901A\u5E38\u7531\u524D\u4E00\u6B21\u5728\u540C\u4E00\u4E2A\u9501\u4E0A\u7684\u81EA\u65CB\u65F6\u95F4\u53CA\u9501\u7684\u62E5\u6709\u8005\u7684\u72B6\u6001\u51B3\u5B9A\u3002</p><h3 id="\u7B80\u8FF0\u9501\u7C97\u5316" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0\u9501\u7C97\u5316" aria-hidden="true">#</a> \u7B80\u8FF0\u9501\u7C97\u5316</h3><p>\u9501\u7C97\u5316\u7684\u601D\u60F3\u5C31\u662F\u6269\u5927\u52A0\u9501\u8303\u56F4\uFF0C\u907F\u514D\u53CD\u590D\u7684\u52A0\u9501\u548C\u89E3\u9501\u3002</p><h3 id="\u7B80\u8FF0\u9501\u6D88\u9664" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0\u9501\u6D88\u9664" aria-hidden="true">#</a> \u7B80\u8FF0\u9501\u6D88\u9664</h3><p>\u9501\u6D88\u9664\u662F\u4E00\u79CD\u66F4\u4E3A\u5F7B\u5E95\u7684\u4F18\u5316\uFF0C\u5728\u7F16\u8BD1\u65F6\uFF0CJava\u7F16\u8BD1\u5668\u5BF9\u8FD0\u884C\u4E0A\u4E0B\u6587\u8FDB\u884C\u626B\u63CF\uFF0C\u53BB\u9664\u4E0D\u53EF\u80FD\u5B58\u5728\u5171\u4EAB\u8D44\u6E90\u7ADE\u4E89\u7684\u9501\u3002</p><h3 id="\u7B80\u8FF0lock\u4E0Ereentrantlock" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0lock\u4E0Ereentrantlock" aria-hidden="true">#</a> \u7B80\u8FF0Lock\u4E0EReentrantLock</h3><p>Lock\u63A5\u53E3\u662F Java\u5E76\u53D1\u5305\u7684\u9876\u5C42\u63A5\u53E3\u3002</p><p>\u53EF\u91CD\u5165\u9501 ReentrantLock \u662F Lock \u6700\u5E38\u89C1\u7684\u5B9E\u73B0\uFF0C\u4E0E synchronized \u4E00\u6837\u53EF\u91CD\u5165\u3002ReentrantLock \u5728\u9ED8\u8BA4\u60C5\u51B5\u4E0B\u662F\u975E\u516C\u5E73\u7684\uFF0C\u53EF\u4EE5\u901A\u8FC7\u6784\u9020\u65B9\u6CD5\u6307\u5B9A\u516C\u5E73\u9501\u3002\u4E00\u65E6\u4F7F\u7528\u4E86\u516C\u5E73\u9501\uFF0C\u6027\u80FD\u4F1A\u4E0B\u964D\u3002</p><h3 id="\u7B80\u8FF0aqs" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0aqs" aria-hidden="true">#</a> \u7B80\u8FF0AQS</h3><p>AQS\uFF08AbstractQuenedSynchronizer\uFF09\u62BD\u8C61\u7684\u961F\u5217\u5F0F\u540C\u6B65\u5668\u3002AQS\u662F\u5C06\u6BCF\u4E00\u6761\u8BF7\u6C42\u5171\u4EAB\u8D44\u6E90\u7684\u7EBF\u7A0B\u5C01\u88C5\u6210\u4E00\u4E2A\u9501\u961F\u5217\u7684\u4E00\u4E2A\u7ED3\u70B9\uFF08Node\uFF09\uFF0C\u6765\u5B9E\u73B0\u9501\u7684\u5206\u914D\u3002AQS\u662F\u7528\u6765\u6784\u5EFA\u9501\u6216\u5176\u4ED6\u540C\u6B65\u7EC4\u4EF6\u7684\u57FA\u7840\u6846\u67B6\uFF0C\u5B83\u4F7F\u7528\u4E00\u4E2A volatile int state \u53D8\u91CF\u4F5C\u4E3A\u5171\u4EAB\u8D44\u6E90\uFF0C\u5982\u679C\u7EBF\u7A0B\u83B7\u53D6\u8D44\u6E90\u5931\u8D25\uFF0C\u5219\u8FDB\u5165\u540C\u6B65\u961F\u5217\u7B49\u5F85\uFF1B\u5982\u679C\u83B7\u53D6\u6210\u529F\u5C31\u6267\u884C\u4E34\u754C\u533A\u4EE3\u7801\uFF0C\u91CA\u653E\u8D44\u6E90\u65F6\u4F1A\u901A\u77E5\u540C\u6B65\u961F\u5217\u4E2D\u7684\u7B49\u5F85\u7EBF\u7A0B\u3002</p><p>\u5B50\u7C7B\u901A\u8FC7\u7EE7\u627F\u540C\u6B65\u5668\u5E76\u5B9E\u73B0\u5B83\u7684\u62BD\u8C61\u65B9\u6CD5getState\u3001setState \u548C compareAndSetState\u5BF9\u540C\u6B65\u72B6\u6001\u8FDB\u884C\u66F4\u6539\u3002</p><p>AQS\u83B7\u53D6\u72EC\u5360\u9501/\u91CA\u653E\u72EC\u5360\u9501\u539F\u7406\uFF1A</p><p>\u83B7\u53D6\uFF1A\uFF08acquire\uFF09</p><ul><li>\u8C03\u7528 tryAcquire \u65B9\u6CD5\u5B89\u5168\u5730\u83B7\u53D6\u7EBF\u7A0B\u540C\u6B65\u72B6\u6001\uFF0C\u83B7\u53D6\u5931\u8D25\u7684\u7EBF\u7A0B\u4F1A\u88AB\u6784\u9020\u540C\u6B65\u8282\u70B9\u5E76\u901A\u8FC7 addWaiter \u65B9\u6CD5\u52A0\u5165\u5230\u540C\u6B65\u961F\u5217\u7684\u5C3E\u90E8\uFF0C\u5728\u961F\u5217\u4E2D\u81EA\u65CB\u3002</li><li>\u8C03\u7528 acquireQueued \u65B9\u6CD5\u4F7F\u5F97\u8BE5\u8282\u70B9\u4EE5\u6B7B\u5FAA\u73AF\u7684\u65B9\u5F0F\u83B7\u53D6\u540C\u6B65\u72B6\u6001\uFF0C\u5982\u679C\u83B7\u53D6\u4E0D\u5230\u5219\u963B\u585E\u3002</li></ul><p>\u91CA\u653E\uFF1A\uFF08release\uFF09</p><ul><li>\u8C03\u7528 tryRelease \u65B9\u6CD5\u91CA\u653E\u540C\u6B65\u72B6\u6001</li><li>\u8C03\u7528 unparkSuccessor \u65B9\u6CD5\u5524\u9192\u5934\u8282\u70B9\u7684\u540E\u7EE7\u8282\u70B9\uFF0C\u4F7F\u540E\u7EE7\u8282\u70B9\u91CD\u65B0\u5C1D\u8BD5\u83B7\u53D6\u540C\u6B65\u72B6\u6001\u3002</li></ul><p>AQS\u83B7\u53D6\u5171\u4EAB\u9501/\u91CA\u653E\u5171\u4EAB\u9501\u539F\u7406</p><p>\u83B7\u53D6\u9501\uFF08acquireShared\uFF09</p><ul><li>\u8C03\u7528 tryAcquireShared \u65B9\u6CD5\u5C1D\u8BD5\u83B7\u53D6\u540C\u6B65\u72B6\u6001\uFF0C\u8FD4\u56DE\u503C\u4E0D\u5C0F\u4E8E 0 \u8868\u793A\u80FD\u83B7\u53D6\u540C\u6B65\u72B6\u6001\u3002</li><li>\u91CA\u653E\uFF08releaseShared\uFF09\uFF0C\u5E76\u5524\u9192\u540E\u7EED\u5904\u4E8E\u7B49\u5F85\u72B6\u6001\u7684\u8282\u70B9\u3002</li></ul><hr>',127),s=a("\u6295\u7A3F\u4F5C\u8005\uFF1A\u540E\u7AEF\u6280\u672F\u5C0F\u725B\u8BF4 \u8F6C\u8F7D\u94FE\u63A5\uFF1A"),u={href:"https://mp.weixin.qq.com/s/PmeH38qWVxyIhBpsAsjG7w",target:"_blank",rel:"noopener noreferrer"},p=a("https://mp.weixin.qq.com/s/PmeH38qWVxyIhBpsAsjG7w"),x=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png",alt:""})],-1);function m(f,b){const i=l("ExternalLinkIcon");return h(),n("div",null,[c,e("p",null,[s,e("a",u,[p,d(i)])]),x])}var S=r(o,[["render",m],["__file","java-thread.html.vue"]]);export{S as default};
+import{_ as r}from"./plugin-vue_export-helper.21dcd24c.js";import{r as l,o as h,c as n,a as e,b as d,e as t,d as a}from"./app.615e41d8.js";const o={},c=t('<h1 id="java-\u5E76\u53D1\u7F16\u7A0B\u516B\u80A1\u6587-\u80CC\u8BF5\u7248-\u5FC5\u770B" tabindex="-1"><a class="header-anchor" href="#java-\u5E76\u53D1\u7F16\u7A0B\u516B\u80A1\u6587-\u80CC\u8BF5\u7248-\u5FC5\u770B" aria-hidden="true">#</a> Java \u5E76\u53D1\u7F16\u7A0B\u516B\u80A1\u6587\uFF08\u80CC\u8BF5\u7248\uFF09\u5FC5\u770B\u{1F44D}</h1><h3 id="\u7B80\u8FF0java\u5185\u5B58\u6A21\u578B-jmm" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0java\u5185\u5B58\u6A21\u578B-jmm" aria-hidden="true">#</a> \u7B80\u8FF0Java\u5185\u5B58\u6A21\u578B\uFF08JMM\uFF09</h3><p>Java\u5185\u5B58\u6A21\u578B\u5B9A\u4E49\u4E86\u7A0B\u5E8F\u4E2D\u5404\u79CD\u53D8\u91CF\u7684\u8BBF\u95EE\u89C4\u5219\uFF1A</p><ul><li>\u6240\u6709\u53D8\u91CF\u90FD\u5B58\u50A8\u5728\u4E3B\u5B58\uFF0C\u6BCF\u4E2A\u7EBF\u7A0B\u90FD\u6709\u81EA\u5DF1\u7684\u5DE5\u4F5C\u5185\u5B58\u3002</li><li>\u5DE5\u4F5C\u5185\u5B58\u4E2D\u4FDD\u5B58\u4E86\u88AB\u8BE5\u7EBF\u7A0B\u4F7F\u7528\u7684\u53D8\u91CF\u7684\u4E3B\u5B58\u526F\u672C\uFF0C\u7EBF\u7A0B\u5BF9\u53D8\u91CF\u7684\u6240\u6709\u64CD\u4F5C\u90FD\u5FC5\u987B\u5728\u5DE5\u4F5C\u7A7A\u95F4\u8FDB\u884C\uFF0C\u4E0D\u80FD\u76F4\u63A5\u8BFB\u5199\u4E3B\u5185\u5B58\u6570\u636E\u3002</li><li>\u64CD\u4F5C\u5B8C\u6210\u540E\uFF0C\u7EBF\u7A0B\u7684\u5DE5\u4F5C\u5185\u5B58\u901A\u8FC7\u7F13\u5B58\u4E00\u81F4\u6027\u534F\u8BAE\u5C06\u64CD\u4F5C\u5B8C\u7684\u6570\u636E\u5237\u56DE\u4E3B\u5B58\u3002</li></ul><h3 id="\u7B80\u8FF0as-if-serial" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0as-if-serial" aria-hidden="true">#</a> \u7B80\u8FF0as-if-serial</h3><p>\u7F16\u8BD1\u5668\u4F1A\u5BF9\u539F\u59CB\u7684\u7A0B\u5E8F\u8FDB\u884C\u6307\u4EE4\u91CD\u6392\u5E8F\u548C\u4F18\u5316\u3002\u4F46\u4E0D\u7BA1\u600E\u4E48\u91CD\u6392\u5E8F\uFF0C\u5176\u7ED3\u679C\u90FD\u5FC5\u987B\u548C\u7528\u6237\u539F\u59CB\u7A0B\u5E8F\u8F93\u51FA\u7684\u9884\u5B9A\u7ED3\u679C\u4FDD\u6301\u4E00\u81F4\u3002</p><h3 id="\u7B80\u8FF0happens-before\u516B\u5927\u89C4\u5219" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0happens-before\u516B\u5927\u89C4\u5219" aria-hidden="true">#</a> \u7B80\u8FF0happens-before\u516B\u5927\u89C4\u5219</h3><ul><li>\u7A0B\u5E8F\u6B21\u5E8F\u89C4\u5219\uFF1A\u4E00\u4E2A\u7EBF\u7A0B\u5185\uFF0C\u6309\u7167\u4EE3\u7801\u987A\u5E8F\uFF0C\u4E66\u5199\u5728\u524D\u9762\u7684\u64CD\u4F5C\u5148\u884C\u53D1\u751F\u4E8E\u4E66\u5199\u5728\u540E\u9762\u7684\u64CD\u4F5C\uFF1B</li><li>\u9501\u5B9A\u89C4\u5219\uFF1A\u4E00\u4E2AunLock\u64CD\u4F5C\u5148\u884C\u53D1\u751F\u4E8E\u540E\u9762\u5BF9\u540C\u4E00\u4E2A\u9501\u7684lock\u64CD\u4F5C\uFF1B</li><li>volatile\u53D8\u91CF\u89C4\u5219\uFF1A\u5BF9\u4E00\u4E2A\u53D8\u91CF\u7684\u5199\u64CD\u4F5C\u5148\u884C\u53D1\u751F\u4E8E\u540E\u9762\u5BF9\u8FD9\u4E2A\u53D8\u91CF\u7684\u8BFB\u64CD\u4F5C\uFF1B</li><li>\u4F20\u9012\u89C4\u5219\uFF1A\u5982\u679C\u64CD\u4F5CA\u5148\u884C\u53D1\u751F\u4E8E\u64CD\u4F5CB\uFF0C\u800C\u64CD\u4F5CB\u53C8\u5148\u884C\u53D1\u751F\u4E8E\u64CD\u4F5CC\uFF0C\u5219\u53EF\u4EE5\u5F97\u51FA\u64CD\u4F5CA\u5148\u884C\u53D1\u751F\u4E8E\u64CD\u4F5CC\uFF1B</li><li>\u7EBF\u7A0B\u542F\u52A8\u89C4\u5219\uFF1AThread\u5BF9\u8C61\u7684start()\u65B9\u6CD5\u5148\u884C\u53D1\u751F\u4E8E\u6B64\u7EBF\u7A0B\u7684\u6BCF\u4E2A\u4E00\u4E2A\u52A8\u4F5C\uFF1B</li><li>\u7EBF\u7A0B\u4E2D\u65AD\u89C4\u5219\uFF1A\u5BF9\u7EBF\u7A0Binterrupt()\u65B9\u6CD5\u7684\u8C03\u7528\u5148\u884C\u53D1\u751F\u4E8E\u88AB\u4E2D\u65AD\u7EBF\u7A0B\u7684\u4EE3\u7801\u68C0\u6D4B\u5230\u4E2D\u65AD\u4E8B\u4EF6\u7684\u53D1\u751F\uFF1B</li><li>\u7EBF\u7A0B\u7EC8\u7ED3\u89C4\u5219\uFF1A\u7EBF\u7A0B\u4E2D\u6240\u6709\u7684\u64CD\u4F5C\u90FD\u5148\u884C\u53D1\u751F\u4E8E\u7EBF\u7A0B\u7684\u7EC8\u6B62\u68C0\u6D4B\uFF0C\u6211\u4EEC\u53EF\u4EE5\u901A\u8FC7Thread.join()\u65B9\u6CD5\u7ED3\u675F\u3001Thread.isAlive()\u7684\u8FD4\u56DE\u503C\u624B\u6BB5\u68C0\u6D4B\u5230\u7EBF\u7A0B\u5DF2\u7ECF\u7EC8\u6B62\u6267\u884C\uFF1B</li><li>\u5BF9\u8C61\u7EC8\u7ED3\u89C4\u5219\uFF1A\u4E00\u4E2A\u5BF9\u8C61\u7684\u521D\u59CB\u5316\u5B8C\u6210\u5148\u884C\u53D1\u751F\u4E8E\u4ED6\u7684finalize()\u65B9\u6CD5\u7684\u5F00\u59CB\uFF1B</li></ul><h3 id="as-if-serial-\u548C-happens-before-\u7684\u533A\u522B" tabindex="-1"><a class="header-anchor" href="#as-if-serial-\u548C-happens-before-\u7684\u533A\u522B" aria-hidden="true">#</a> as-if-serial \u548C happens-before \u7684\u533A\u522B</h3><p>as-if-serial \u4FDD\u8BC1\u5355\u7EBF\u7A0B\u7A0B\u5E8F\u7684\u6267\u884C\u7ED3\u679C\u4E0D\u53D8\uFF0Chappens-before \u4FDD\u8BC1\u6B63\u786E\u540C\u6B65\u7684\u591A\u7EBF\u7A0B\u7A0B\u5E8F\u7684\u6267\u884C\u7ED3\u679C\u4E0D\u53D8\u3002</p><h3 id="\u7B80\u8FF0\u539F\u5B50\u6027\u64CD\u4F5C" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0\u539F\u5B50\u6027\u64CD\u4F5C" aria-hidden="true">#</a> \u7B80\u8FF0\u539F\u5B50\u6027\u64CD\u4F5C</h3><p>\u4E00\u4E2A\u64CD\u4F5C\u6216\u8005\u591A\u4E2A\u64CD\u4F5C\uFF0C\u8981\u4E48\u5168\u90E8\u6267\u884C\u5E76\u4E14\u6267\u884C\u7684\u8FC7\u7A0B\u4E0D\u4F1A\u88AB\u4EFB\u4F55\u56E0\u7D20\u6253\u65AD\uFF0C\u8981\u4E48\u5C31\u90FD\u4E0D\u6267\u884C\uFF0C\u8FD9\u5C31\u662F\u539F\u5B50\u6027\u64CD\u4F5C\u3002</p><h3 id="\u7B80\u8FF0\u7EBF\u7A0B\u7684\u53EF\u89C1\u6027" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0\u7EBF\u7A0B\u7684\u53EF\u89C1\u6027" aria-hidden="true">#</a> \u7B80\u8FF0\u7EBF\u7A0B\u7684\u53EF\u89C1\u6027</h3><p>\u53EF\u89C1\u6027\u6307\u5F53\u4E00\u4E2A\u7EBF\u7A0B\u4FEE\u6539\u4E86\u5171\u4EAB\u53D8\u91CF\u65F6\uFF0C\u5176\u4ED6\u7EBF\u7A0B\u80FD\u591F\u7ACB\u5373\u5F97\u77E5\u4FEE\u6539\u3002volatile\u3001synchronized\u3001final \u5173\u952E\u5B57\u90FD\u80FD\u4FDD\u8BC1\u53EF\u89C1\u6027\u3002</p><h3 id="\u7B80\u8FF0\u6709\u5E8F\u6027" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0\u6709\u5E8F\u6027" aria-hidden="true">#</a> \u7B80\u8FF0\u6709\u5E8F\u6027</h3><p>\u867D\u7136\u591A\u7EBF\u7A0B\u5B58\u5728\u5E76\u53D1\u548C\u6307\u4EE4\u4F18\u5316\u7B49\u64CD\u4F5C\uFF0C\u4F46\u5728\u672C\u7EBF\u7A0B\u5185\u89C2\u5BDF\u8BE5\u7EBF\u7A0B\u7684\u6240\u6709\u6267\u884C\u64CD\u4F5C\u662F\u6709\u5E8F\u7684\u3002</p><h3 id="\u7B80\u8FF0java\u4E2Dvolatile\u5173\u952E\u5B57\u4F5C\u7528" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0java\u4E2Dvolatile\u5173\u952E\u5B57\u4F5C\u7528" aria-hidden="true">#</a> \u7B80\u8FF0Java\u4E2Dvolatile\u5173\u952E\u5B57\u4F5C\u7528</h3><ul><li>\u4FDD\u8BC1\u53D8\u91CF\u5BF9\u6240\u6709\u7EBF\u7A0B\u7684\u53EF\u89C1\u6027\u3002\u5F53\u4E00\u4E2A\u7EBF\u7A0B\u4FEE\u6539\u4E86\u53D8\u91CF\u503C\uFF0C\u65B0\u503C\u5BF9\u4E8E\u5176\u4ED6\u7EBF\u7A0B\u6765\u8BF4\u662F\u7ACB\u5373\u53EF\u4EE5\u5F97\u77E5\u7684\u3002</li><li>\u7981\u6B62\u6307\u4EE4\u91CD\u6392\u3002\u4F7F\u7528 volatile \u53D8\u91CF\u8FDB\u884C\u5199\u64CD\u4F5C\uFF0C\u7F16\u8BD1\u5668\u5728\u751F\u6210\u5B57\u8282\u7801\u65F6\uFF0C\u4F1A\u5728\u6307\u4EE4\u5E8F\u5217\u4E2D\u63D2\u5165\u5185\u5B58\u5C4F\u969C\u6765\u7981\u6B62\u7279\u5B9A\u7C7B\u578B\u7684\u5904\u7406\u5668\u8FDB\u884C\u91CD\u6392\u5E8F\u3002</li></ul><h3 id="java\u7EBF\u7A0B\u7684\u5B9E\u73B0\u65B9\u5F0F" tabindex="-1"><a class="header-anchor" href="#java\u7EBF\u7A0B\u7684\u5B9E\u73B0\u65B9\u5F0F" aria-hidden="true">#</a> Java\u7EBF\u7A0B\u7684\u5B9E\u73B0\u65B9\u5F0F</h3><ul><li>\u5B9E\u73B0Runnable\u63A5\u53E3</li><li>\u7EE7\u627FThread\u7C7B</li><li>\u5B9E\u73B0Callable\u63A5\u53E3</li></ul><h3 id="\u7B80\u8FF0java\u7EBF\u7A0B\u7684\u72B6\u6001" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0java\u7EBF\u7A0B\u7684\u72B6\u6001" aria-hidden="true">#</a> \u7B80\u8FF0Java\u7EBF\u7A0B\u7684\u72B6\u6001</h3><p>\u7EBF\u7A0B\u72B6\u6001\u6709 NEW\u3001RUNNABLE\u3001BLOCK\u3001WAITING\u3001TIMED_WAITING\u3001THERMINATED</p><ul><li>NEW\uFF1A\u65B0\u5EFA\u72B6\u6001\uFF0C\u7EBF\u7A0B\u88AB\u521B\u5EFA\u4E14\u672A\u542F\u52A8\uFF0C\u6B64\u65F6\u8FD8\u672A\u8C03\u7528 start \u65B9\u6CD5\u3002</li><li>RUNNABLE\uFF1A\u8FD0\u884C\u72B6\u6001\u3002\u8868\u793A\u7EBF\u7A0B\u6B63\u5728JVM\u4E2D\u6267\u884C\uFF0C\u4F46\u662F\u8FD9\u4E2A\u6267\u884C\uFF0C\u4E0D\u4E00\u5B9A\u771F\u7684\u5728\u8DD1\uFF0C\u4E5F\u53EF\u80FD\u5728\u6392\u961F\u7B49CPU\u3002</li><li>BLOCKED\uFF1A\u963B\u585E\u72B6\u6001\u3002\u7EBF\u7A0B\u7B49\u5F85\u83B7\u53D6\u9501\uFF0C\u9501\u8FD8\u6CA1\u83B7\u5F97\u3002</li><li>WAITING\uFF1A\u7B49\u5F85\u72B6\u6001\u3002\u7EBF\u7A0B\u5185run\u65B9\u6CD5\u6267\u884C\u5B8CObject.wait()/Thread.join()\u8FDB\u5165\u8BE5\u72B6\u6001\u3002</li><li>TIMED_WAITING\uFF1A\u9650\u671F\u7B49\u5F85\u3002\u5728\u4E00\u5B9A\u65F6\u95F4\u4E4B\u540E\u8DF3\u51FA\u72B6\u6001\u3002\u8C03\u7528Thread.sleep(long) Object.wait(long) Thread.join(long)\u8FDB\u5165\u72B6\u6001\u3002\u5176\u4E2D\u8FD9\u4E9B\u53C2\u6570\u4EE3\u8868\u7B49\u5F85\u7684\u65F6\u95F4\u3002</li><li>TERMINATED\uFF1A\u7ED3\u675F\u72B6\u6001\u3002\u7EBF\u7A0B\u8C03\u7528\u5B8Crun\u65B9\u6CD5\u8FDB\u5165\u8BE5\u72B6\u6001\u3002</li></ul><h3 id="\u7B80\u8FF0\u7EBF\u7A0B\u901A\u4FE1\u7684\u65B9\u5F0F" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0\u7EBF\u7A0B\u901A\u4FE1\u7684\u65B9\u5F0F" aria-hidden="true">#</a> \u7B80\u8FF0\u7EBF\u7A0B\u901A\u4FE1\u7684\u65B9\u5F0F</h3><ul><li>volatile \u5173\u952E\u8BCD\u4FEE\u9970\u53D8\u91CF\uFF0C\u4FDD\u8BC1\u6240\u6709\u7EBF\u7A0B\u5BF9\u53D8\u91CF\u8BBF\u95EE\u7684\u53EF\u89C1\u6027\u3002</li><li>synchronized\u5173\u952E\u8BCD\u3002\u786E\u4FDD\u591A\u4E2A\u7EBF\u7A0B\u5728\u540C\u4E00\u65F6\u523B\u53EA\u80FD\u6709\u4E00\u4E2A\u5904\u4E8E\u65B9\u6CD5\u6216\u540C\u6B65\u5757\u4E2D\u3002</li><li>wait/notify\u65B9\u6CD5</li><li>IO\u901A\u4FE1</li></ul><h3 id="\u7B80\u8FF0\u7EBF\u7A0B\u6C60" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0\u7EBF\u7A0B\u6C60" aria-hidden="true">#</a> \u7B80\u8FF0\u7EBF\u7A0B\u6C60</h3><p>\u6CA1\u6709\u7EBF\u7A0B\u6C60\u7684\u60C5\u51B5\u4E0B\uFF0C\u591A\u6B21\u521B\u5EFA\uFF0C\u9500\u6BC1\u7EBF\u7A0B\u5F00\u9500\u6BD4\u8F83\u5927\u3002\u5982\u679C\u5728\u5F00\u8F9F\u7684\u7EBF\u7A0B\u6267\u884C\u5B8C\u5F53\u524D\u4EFB\u52A1\u540E\u590D\u7528\u5DF2\u521B\u5EFA\u7684\u7EBF\u7A0B\uFF0C\u53EF\u4EE5\u964D\u4F4E\u5F00\u9500\u3001\u63A7\u5236\u6700\u5927\u5E76\u53D1\u6570\u3002</p><p>\u7EBF\u7A0B\u6C60\u521B\u5EFA\u7EBF\u7A0B\u65F6\uFF0C\u4F1A\u5C06\u7EBF\u7A0B\u5C01\u88C5\u6210\u5DE5\u4F5C\u7EBF\u7A0B Worker\uFF0CWorker \u5728\u6267\u884C\u5B8C\u4EFB\u52A1\u540E\u8FD8\u4F1A\u5FAA\u73AF\u83B7\u53D6\u5DE5\u4F5C\u961F\u5217\u4E2D\u7684\u4EFB\u52A1\u6765\u6267\u884C\u3002</p><p>\u5C06\u4EFB\u52A1\u6D3E\u53D1\u7ED9\u7EBF\u7A0B\u6C60\u65F6\uFF0C\u4F1A\u51FA\u73B0\u4EE5\u4E0B\u51E0\u79CD\u60C5\u51B5</p><ul><li>\u6838\u5FC3\u7EBF\u7A0B\u6C60\u672A\u6EE1\uFF0C\u521B\u5EFA\u4E00\u4E2A\u65B0\u7684\u7EBF\u7A0B\u6267\u884C\u4EFB\u52A1\u3002</li><li>\u5982\u679C\u6838\u5FC3\u7EBF\u7A0B\u6C60\u5DF2\u6EE1\uFF0C\u5DE5\u4F5C\u961F\u5217\u672A\u6EE1\uFF0C\u5C06\u7EBF\u7A0B\u5B58\u50A8\u5728\u5DE5\u4F5C\u961F\u5217\u3002</li><li>\u5982\u679C\u5DE5\u4F5C\u961F\u5217\u5DF2\u6EE1\uFF0C\u7EBF\u7A0B\u6570\u5C0F\u4E8E\u6700\u5927\u7EBF\u7A0B\u6570\u5C31\u521B\u5EFA\u4E00\u4E2A\u65B0\u7EBF\u7A0B\u5904\u7406\u4EFB\u52A1\u3002</li><li>\u5982\u679C\u8D85\u8FC7\u5927\u5C0F\u7EBF\u7A0B\u6570\uFF0C\u6309\u7167\u62D2\u7EDD\u7B56\u7565\u6765\u5904\u7406\u4EFB\u52A1\u3002</li></ul><p>\u7EBF\u7A0B\u6C60\u53C2\u6570\uFF1A</p><ul><li>corePoolSize\uFF1A\u5E38\u9A7B\u6838\u5FC3\u7EBF\u7A0B\u6570\u3002\u8D85\u8FC7\u8BE5\u503C\u540E\u5982\u679C\u7EBF\u7A0B\u7A7A\u95F2\u4F1A\u88AB\u9500\u6BC1\u3002</li><li>maximumPoolSize\uFF1A\u7EBF\u7A0B\u6C60\u80FD\u591F\u5BB9\u7EB3\u540C\u65F6\u6267\u884C\u7684\u7EBF\u7A0B\u6700\u5927\u6570\u3002</li><li>keepAliveTime\uFF1A\u7EBF\u7A0B\u7A7A\u95F2\u65F6\u95F4\uFF0C\u7EBF\u7A0B\u7A7A\u95F2\u65F6\u95F4\u8FBE\u5230\u8BE5\u503C\u540E\u4F1A\u88AB\u9500\u6BC1\uFF0C\u76F4\u5230\u53EA\u5269\u4E0B corePoolSize \u4E2A\u7EBF\u7A0B\u4E3A\u6B62\uFF0C\u907F\u514D\u6D6A\u8D39\u5185\u5B58\u8D44\u6E90\u3002</li><li>workQueue\uFF1A\u5DE5\u4F5C\u961F\u5217\u3002</li><li>threadFactory\uFF1A\u7EBF\u7A0B\u5DE5\u5382\uFF0C\u7528\u6765\u751F\u4EA7\u4E00\u7EC4\u76F8\u540C\u4EFB\u52A1\u7684\u7EBF\u7A0B\u3002</li><li>handler\uFF1A\u62D2\u7EDD\u7B56\u7565\u3002</li></ul><p>\u62D2\u7EDD\u7B56\u7565\u6709\u4EE5\u4E0B\u51E0\u79CD\uFF1A</p><ul><li>AbortPolicy\uFF1A\u4E22\u5F03\u4EFB\u52A1\u5E76\u629B\u51FA\u5F02\u5E38</li><li>CallerRunsPolicy\uFF1A\u91CD\u65B0\u5C1D\u8BD5\u63D0\u4EA4\u8BE5\u4EFB\u52A1</li><li>DiscardOldestPolicy \u629B\u5F03\u961F\u5217\u91CC\u7B49\u5F85\u6700\u4E45\u7684\u4EFB\u52A1\u5E76\u628A\u5F53\u524D\u4EFB\u52A1\u52A0\u5165\u961F\u5217</li><li>DiscardPolicy \u8868\u793A\u76F4\u63A5\u629B\u5F03\u5F53\u524D\u4EFB\u52A1\u4F46\u4E0D\u629B\u51FA\u5F02\u5E38\u3002</li></ul><h3 id="\u7B80\u8FF0executor\u6846\u67B6" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0executor\u6846\u67B6" aria-hidden="true">#</a> \u7B80\u8FF0Executor\u6846\u67B6</h3><p>Executor\u6846\u67B6\u76EE\u7684\u662F\u5C06\u4EFB\u52A1\u63D0\u4EA4\u548C\u4EFB\u52A1\u5982\u4F55\u8FD0\u884C\u5206\u79BB\u5F00\u6765\u7684\u673A\u5236\u3002\u7528\u6237\u4E0D\u518D\u9700\u8981\u4ECE\u4EE3\u7801\u5C42\u8003\u8651\u8BBE\u8BA1\u4EFB\u52A1\u7684\u63D0\u4EA4\u8FD0\u884C\uFF0C\u53EA\u9700\u8981\u8C03\u7528Executor\u6846\u67B6\u5B9E\u73B0\u7C7B\u7684Execute\u65B9\u6CD5\u5C31\u53EF\u4EE5\u63D0\u4EA4\u4EFB\u52A1\u3002</p><h3 id="\u7B80\u8FF0executor\u7684\u7EE7\u627F\u5173\u7CFB" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0executor\u7684\u7EE7\u627F\u5173\u7CFB" aria-hidden="true">#</a> \u7B80\u8FF0Executor\u7684\u7EE7\u627F\u5173\u7CFB</h3><ul><li>Executor\uFF1A\u4E00\u4E2A\u63A5\u53E3\uFF0C\u5176\u5B9A\u4E49\u4E86\u4E00\u4E2A\u63A5\u6536Runnable\u5BF9\u8C61\u7684\u65B9\u6CD5executor\uFF0C\u8BE5\u65B9\u6CD5\u63A5\u6536\u4E00\u4E2ARunable\u5B9E\u4F8B\u6267\u884C\u8FD9\u4E2A\u4EFB\u52A1\u3002</li><li>ExecutorService\uFF1AExecutor\u7684\u5B50\u7C7B\u63A5\u53E3\uFF0C\u5176\u5B9A\u4E49\u4E86\u4E00\u4E2A\u63A5\u6536Callable\u5BF9\u8C61\u7684\u65B9\u6CD5\uFF0C\u8FD4\u56DE Future \u5BF9\u8C61\uFF0C\u540C\u65F6\u63D0\u4F9Bexecute\u65B9\u6CD5\u3002</li><li>ScheduledExecutorService\uFF1AExecutorService\u7684\u5B50\u7C7B\u63A5\u53E3\uFF0C\u652F\u6301\u5B9A\u671F\u6267\u884C\u4EFB\u52A1\u3002</li><li>AbstractExecutorService\uFF1A\u62BD\u8C61\u7C7B\uFF0C\u63D0\u4F9B ExecutorService \u6267\u884C\u65B9\u6CD5\u7684\u9ED8\u8BA4\u5B9E\u73B0\u3002</li><li>Executors\uFF1A\u5B9E\u73B0ExecutorService\u63A5\u53E3\u7684\u9759\u6001\u5DE5\u5382\u7C7B\uFF0C\u63D0\u4F9B\u4E86\u4E00\u7CFB\u5217\u5DE5\u5382\u65B9\u6CD5\u7528\u4E8E\u521B\u5EFA\u7EBF\u7A0B\u6C60\u3002</li><li>ThreadPoolExecutor\uFF1A\u7EE7\u627FAbstractExecutorService\uFF0C\u7528\u4E8E\u521B\u5EFA\u7EBF\u7A0B\u6C60\u3002</li><li>ForkJoinPool: \u7EE7\u627FAbstractExecutorService\uFF0CFork \u5C06\u5927\u4EFB\u52A1\u5206\u53C9\u4E3A\u591A\u4E2A\u5C0F\u4EFB\u52A1\uFF0C\u7136\u540E\u8BA9\u5C0F\u4EFB\u52A1\u6267\u884C\uFF0CJoin \u662F\u83B7\u5F97\u5C0F\u4EFB\u52A1\u7684\u7ED3\u679C\uFF0C\u7C7B\u4F3C\u4E8Emap reduce\u3002</li><li>ThreadPoolExecutor\uFF1A\u7EE7\u627FThreadPoolExecutor\uFF0C\u5B9E\u73B0ScheduledExecutorService\uFF0C\u7528\u4E8E\u521B\u5EFA\u5E26\u5B9A\u65F6\u4EFB\u52A1\u7684\u7EBF\u7A0B\u6C60\u3002</li></ul><h3 id="\u7B80\u8FF0\u7EBF\u7A0B\u6C60\u7684\u72B6\u6001" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0\u7EBF\u7A0B\u6C60\u7684\u72B6\u6001" aria-hidden="true">#</a> \u7B80\u8FF0\u7EBF\u7A0B\u6C60\u7684\u72B6\u6001</h3><ul><li>Running\uFF1A\u80FD\u63A5\u53D7\u65B0\u63D0\u4EA4\u7684\u4EFB\u52A1\uFF0C\u4E5F\u53EF\u4EE5\u5904\u7406\u963B\u585E\u961F\u5217\u7684\u4EFB\u52A1\u3002</li><li>Shutdown\uFF1A\u4E0D\u518D\u63A5\u53D7\u65B0\u63D0\u4EA4\u7684\u4EFB\u52A1\uFF0C\u4F46\u53EF\u4EE5\u5904\u7406\u5B58\u91CF\u4EFB\u52A1\uFF0C\u7EBF\u7A0B\u6C60\u5904\u4E8Erunning\u65F6\u8C03\u7528shutdown\u65B9\u6CD5\uFF0C\u4F1A\u8FDB\u5165\u8BE5\u72B6\u6001\u3002</li><li>Stop\uFF1A\u4E0D\u63A5\u53D7\u65B0\u4EFB\u52A1\uFF0C\u4E0D\u5904\u7406\u5B58\u91CF\u4EFB\u52A1\uFF0C\u8C03\u7528shutdownnow\u8FDB\u5165\u8BE5\u72B6\u6001\u3002</li><li>Tidying\uFF1A\u6240\u6709\u4EFB\u52A1\u5DF2\u7ECF\u7EC8\u6B62\u4E86\uFF0Cworker_count\uFF08\u6709\u6548\u7EBF\u7A0B\u6570\uFF09\u4E3A0\u3002</li><li>Terminated\uFF1A\u7EBF\u7A0B\u6C60\u5F7B\u5E95\u7EC8\u6B62\u3002\u5728tidying\u6A21\u5F0F\u4E0B\u8C03\u7528terminated\u65B9\u6CD5\u4F1A\u8FDB\u5165\u8BE5\u72B6\u6001\u3002</li></ul><h3 id="\u7B80\u8FF0\u7EBF\u7A0B\u6C60\u7C7B\u578B" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0\u7EBF\u7A0B\u6C60\u7C7B\u578B" aria-hidden="true">#</a> \u7B80\u8FF0\u7EBF\u7A0B\u6C60\u7C7B\u578B</h3><ul><li>newCachedThreadPool \u53EF\u7F13\u5B58\u7EBF\u7A0B\u6C60\uFF0C\u53EF\u8BBE\u7F6E\u6700\u5C0F\u7EBF\u7A0B\u6570\u548C\u6700\u5927\u7EBF\u7A0B\u6570\uFF0C\u7EBF\u7A0B\u7A7A\u95F21\u5206\u949F\u540E\u81EA\u52A8\u9500\u6BC1\u3002</li><li>newFixedThreadPool \u6307\u5B9A\u5DE5\u4F5C\u7EBF\u7A0B\u6570\u91CF\u7EBF\u7A0B\u6C60\u3002</li><li>newSingleThreadExecutor \u5355\u7EBF\u7A0BExecutor\u3002</li><li>newScheduleThreadPool \u652F\u6301\u5B9A\u65F6\u4EFB\u52A1\u7684\u6307\u5B9A\u5DE5\u4F5C\u7EBF\u7A0B\u6570\u91CF\u7EBF\u7A0B\u6C60\u3002</li><li>newSingleThreadScheduledExecutor \u652F\u6301\u5B9A\u65F6\u4EFB\u52A1\u7684\u5355\u7EBF\u7A0BExecutor\u3002</li></ul><h3 id="\u7B80\u8FF0\u963B\u585E\u961F\u5217" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0\u963B\u585E\u961F\u5217" aria-hidden="true">#</a> \u7B80\u8FF0\u963B\u585E\u961F\u5217</h3><p>\u963B\u585E\u961F\u5217\u662F\u751F\u4EA7\u8005\u6D88\u8D39\u8005\u7684\u5B9E\u73B0\u5177\u4F53\u7EC4\u4EF6\u4E4B\u4E00\u3002\u5F53\u963B\u585E\u961F\u5217\u4E3A\u7A7A\u65F6\uFF0C\u4ECE\u961F\u5217\u4E2D\u83B7\u53D6\u5143\u7D20\u7684\u64CD\u4F5C\u5C06\u4F1A\u88AB\u963B\u585E\uFF0C\u5F53\u963B\u585E\u961F\u5217\u6EE1\u4E86\uFF0C\u5F80\u961F\u5217\u6DFB\u52A0\u5143\u7D20\u7684\u64CD\u4F5C\u5C06\u4F1A\u88AB\u963B\u585E\u3002\u5177\u4F53\u5B9E\u73B0\u6709\uFF1A</p><ul><li>ArrayBlockingQueue\uFF1A\u5E95\u5C42\u662F\u7531\u6570\u7EC4\u7EC4\u6210\u7684\u6709\u754C\u963B\u585E\u961F\u5217\u3002</li><li>LinkedBlockingQueue\uFF1A\u5E95\u5C42\u662F\u7531\u94FE\u8868\u7EC4\u6210\u7684\u6709\u754C\u963B\u585E\u961F\u5217\u3002</li><li>PriorityBlockingQueue\uFF1A\u963B\u585E\u4F18\u5148\u961F\u5217\u3002</li><li>DelayQueue\uFF1A\u521B\u5EFA\u5143\u7D20\u65F6\u53EF\u4EE5\u6307\u5B9A\u591A\u4E45\u624D\u80FD\u4ECE\u961F\u5217\u4E2D\u83B7\u53D6\u5F53\u524D\u5143\u7D20</li><li>SynchronousQueue\uFF1A\u4E0D\u5B58\u50A8\u5143\u7D20\u7684\u963B\u585E\u961F\u5217\uFF0C\u6BCF\u4E00\u4E2A\u5B58\u50A8\u5FC5\u987B\u7B49\u5F85\u4E00\u4E2A\u53D6\u51FA\u64CD\u4F5C</li><li>LinkedTransferQueue\uFF1A\u4E0ELinkedBlockingQueue\u76F8\u6BD4\u591A\u4E00\u4E2Atransfer\u65B9\u6CD5\uFF0C\u5373\u5982\u679C\u5F53\u524D\u6709\u6D88\u8D39\u8005\u6B63\u7B49\u5F85\u63A5\u6536\u5143\u7D20\uFF0C\u53EF\u4EE5\u628A\u751F\u4EA7\u8005\u4F20\u5165\u7684\u5143\u7D20\u7ACB\u523B\u4F20\u8F93\u7ED9\u6D88\u8D39\u8005\u3002</li><li>LinkedBlockingDeque\uFF1A\u53CC\u5411\u963B\u585E\u961F\u5217\u3002</li></ul><h3 id="\u8C08\u4E00\u8C08threadlocal" tabindex="-1"><a class="header-anchor" href="#\u8C08\u4E00\u8C08threadlocal" aria-hidden="true">#</a> \u8C08\u4E00\u8C08ThreadLocal</h3><p>ThreadLocal \u662F\u7EBF\u7A0B\u5171\u4EAB\u53D8\u91CF\u3002ThreadLoacl \u6709\u4E00\u4E2A\u9759\u6001\u5185\u90E8\u7C7B ThreadLocalMap\uFF0C\u5176 Key \u662F ThreadLocal \u5BF9\u8C61\uFF0C\u503C\u662F Entry \u5BF9\u8C61\uFF0CThreadLocalMap\u662F\u6BCF\u4E2A\u7EBF\u7A0B\u79C1\u6709\u7684\u3002</p><ul><li>set \u7ED9ThreadLocalMap\u8BBE\u7F6E\u503C\u3002</li><li>get \u83B7\u53D6ThreadLocalMap\u3002</li><li>remove \u5220\u9664ThreadLocalMap\u7C7B\u578B\u7684\u5BF9\u8C61\u3002</li></ul><p>\u5B58\u5728\u7684\u95EE\u9898\uFF1A\u5BF9\u4E8E\u7EBF\u7A0B\u6C60\uFF0C\u7531\u4E8E\u7EBF\u7A0B\u6C60\u4F1A\u91CD\u7528 Thread \u5BF9\u8C61\uFF0C\u56E0\u6B64\u4E0E Thread \u7ED1\u5B9A\u7684 ThreadLocal \u4E5F\u4F1A\u88AB\u91CD\u7528\uFF0C\u9020\u6210\u4E00\u7CFB\u5217\u95EE\u9898\u3002</p><p>\u6BD4\u5982\u8BF4\u5185\u5B58\u6CC4\u6F0F\u3002\u7531\u4E8E ThreadLocal \u662F\u5F31\u5F15\u7528\uFF0C\u4F46 Entry \u7684 value \u662F\u5F3A\u5F15\u7528\uFF0C\u56E0\u6B64\u5F53 ThreadLocal \u88AB\u5783\u573E\u56DE\u6536\u540E\uFF0Cvalue \u4F9D\u65E7\u4E0D\u4F1A\u88AB\u91CA\u653E\uFF0C\u4EA7\u751F\u5185\u5B58\u6CC4\u6F0F\u3002</p><h3 id="\u804A\u804A\u4F60\u5BF9java\u5E76\u53D1\u5305\u4E0Bunsafe\u7C7B\u7684\u7406\u89E3" tabindex="-1"><a class="header-anchor" href="#\u804A\u804A\u4F60\u5BF9java\u5E76\u53D1\u5305\u4E0Bunsafe\u7C7B\u7684\u7406\u89E3" aria-hidden="true">#</a> \u804A\u804A\u4F60\u5BF9Java\u5E76\u53D1\u5305\u4E0Bunsafe\u7C7B\u7684\u7406\u89E3</h3><p>\u5BF9\u4E8E Java \u8BED\u8A00\uFF0C\u6CA1\u6709\u76F4\u63A5\u7684\u6307\u9488\u7EC4\u4EF6\uFF0C\u4E00\u822C\u4E5F\u4E0D\u80FD\u4F7F\u7528\u504F\u79FB\u91CF\u5BF9\u67D0\u5757\u5185\u5B58\u8FDB\u884C\u64CD\u4F5C\u3002\u8FD9\u4E9B\u64CD\u4F5C\u76F8\u5BF9\u6765\u8BB2\u662F\u5B89\u5168\uFF08safe\uFF09\u7684\u3002</p><p>Java \u6709\u4E2A\u7C7B\u53EB Unsafe \u7C7B\uFF0C\u8FD9\u4E2A\u7C7B\u4F7F Java \u62E5\u6709\u4E86\u50CF C \u8BED\u8A00\u7684\u6307\u9488\u4E00\u6837\u64CD\u4F5C\u5185\u5B58\u7A7A\u95F4\u7684\u80FD\u529B\uFF0C\u540C\u65F6\u4E5F\u5E26\u6765\u4E86\u6307\u9488\u7684\u95EE\u9898\u3002\u8FD9\u4E2A\u7C7B\u53EF\u4EE5\u8BF4\u662F Java \u5E76\u53D1\u5F00\u53D1\u7684\u57FA\u7840\u3002</p><h3 id="java\u4E2D\u7684\u4E50\u89C2\u9501\u4E0Ecas\u7B97\u6CD5" tabindex="-1"><a class="header-anchor" href="#java\u4E2D\u7684\u4E50\u89C2\u9501\u4E0Ecas\u7B97\u6CD5" aria-hidden="true">#</a> Java\u4E2D\u7684\u4E50\u89C2\u9501\u4E0ECAS\u7B97\u6CD5</h3><p>\u4E50\u89C2\u9501\u8BA4\u4E3A\u6570\u636E\u53D1\u9001\u65F6\u53D1\u751F\u5E76\u53D1\u51B2\u7A81\u7684\u6982\u7387\u4E0D\u5927\uFF0C\u6240\u4EE5\u8BFB\u64CD\u4F5C\u524D\u4E0D\u4E0A\u9501\u3002</p><p>\u5230\u4E86\u5199\u64CD\u4F5C\u65F6\u624D\u4F1A\u8FDB\u884C\u5224\u65AD\uFF0C\u6570\u636E\u5728\u6B64\u671F\u95F4\u662F\u5426\u88AB\u5176\u4ED6\u7EBF\u7A0B\u4FEE\u6539\u3002\u5982\u679C\u53D1\u751F\u4FEE\u6539\uFF0C\u90A3\u5C31\u8FD4\u56DE\u5199\u5165\u5931\u8D25\uFF1B\u5982\u679C\u6CA1\u6709\u88AB\u4FEE\u6539\uFF0C\u90A3\u5C31\u6267\u884C\u4FEE\u6539\u64CD\u4F5C\uFF0C\u8FD4\u56DE\u4FEE\u6539\u6210\u529F\u3002</p><p>\u4E50\u89C2\u9501\u4E00\u822C\u90FD\u91C7\u7528 Compare And Swap\uFF08CAS\uFF09\u7B97\u6CD5\u8FDB\u884C\u5B9E\u73B0\u3002\u987E\u540D\u601D\u4E49\uFF0C\u8BE5\u7B97\u6CD5\u6D89\u53CA\u5230\u4E86\u4E24\u4E2A\u64CD\u4F5C\uFF0C\u6BD4\u8F83\uFF08Compare\uFF09\u548C\u4EA4\u6362\uFF08Swap\uFF09\u3002</p><p>CAS \u7B97\u6CD5\u7684\u601D\u8DEF\u5982\u4E0B\uFF1A</p><ul><li>\u8BE5\u7B97\u6CD5\u8BA4\u4E3A\u4E0D\u540C\u7EBF\u7A0B\u5BF9\u53D8\u91CF\u7684\u64CD\u4F5C\u65F6\u4EA7\u751F\u7ADE\u4E89\u7684\u60C5\u51B5\u6BD4\u8F83\u5C11\u3002</li><li>\u8BE5\u7B97\u6CD5\u7684\u6838\u5FC3\u662F\u5BF9\u5F53\u524D\u8BFB\u53D6\u53D8\u91CF\u503C E \u548C\u5185\u5B58\u4E2D\u7684\u53D8\u91CF\u65E7\u503C V \u8FDB\u884C\u6BD4\u8F83\u3002</li><li>\u5982\u679C\u76F8\u7B49\uFF0C\u5C31\u4EE3\u8868\u5176\u4ED6\u7EBF\u7A0B\u6CA1\u6709\u5BF9\u8BE5\u53D8\u91CF\u8FDB\u884C\u4FEE\u6539\uFF0C\u5C31\u5C06\u53D8\u91CF\u503C\u66F4\u65B0\u4E3A\u65B0\u503C N\u3002</li><li>\u5982\u679C\u4E0D\u7B49\uFF0C\u5C31\u8BA4\u4E3A\u5728\u8BFB\u53D6\u503C E \u5230\u6BD4\u8F83\u9636\u6BB5\uFF0C\u6709\u5176\u4ED6\u7EBF\u7A0B\u5BF9\u53D8\u91CF\u8FDB\u884C\u8FC7\u4FEE\u6539\uFF0C\u4E0D\u8FDB\u884C\u4EFB\u4F55\u64CD\u4F5C\u3002</li></ul><h3 id="aba\u95EE\u9898\u53CA\u89E3\u51B3\u65B9\u6CD5\u7B80\u8FF0" tabindex="-1"><a class="header-anchor" href="#aba\u95EE\u9898\u53CA\u89E3\u51B3\u65B9\u6CD5\u7B80\u8FF0" aria-hidden="true">#</a> ABA\u95EE\u9898\u53CA\u89E3\u51B3\u65B9\u6CD5\u7B80\u8FF0</h3><p>CAS \u7B97\u6CD5\u662F\u57FA\u4E8E\u503C\u6765\u505A\u6BD4\u8F83\u7684\uFF0C\u5982\u679C\u5F53\u524D\u6709\u4E24\u4E2A\u7EBF\u7A0B\uFF0C\u4E00\u4E2A\u7EBF\u7A0B\u5C06\u53D8\u91CF\u503C\u4ECE A \u6539\u4E3A B \uFF0C\u518D\u7531 B \u6539\u56DE\u4E3A A \uFF0C\u5F53\u524D\u7EBF\u7A0B\u5F00\u59CB\u6267\u884C CAS \u7B97\u6CD5\u65F6\uFF0C\u5C31\u5F88\u5BB9\u6613\u8BA4\u4E3A\u503C\u6CA1\u6709\u53D8\u5316\uFF0C\u8BEF\u8BA4\u4E3A\u8BFB\u53D6\u6570\u636E\u5230\u6267\u884C CAS \u7B97\u6CD5\u7684\u671F\u95F4\uFF0C\u6CA1\u6709\u7EBF\u7A0B\u4FEE\u6539\u8FC7\u6570\u636E\u3002</p><p>juc \u5305\u63D0\u4F9B\u4E86\u4E00\u4E2A AtomicStampedReference\uFF0C\u5373\u5728\u539F\u59CB\u7684\u7248\u672C\u4E0B\u52A0\u5165\u7248\u672C\u53F7\u6233\uFF0C\u89E3\u51B3 ABA \u95EE\u9898\u3002</p><h3 id="\u7B80\u8FF0\u5E38\u89C1\u7684atomic\u7C7B" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0\u5E38\u89C1\u7684atomic\u7C7B" aria-hidden="true">#</a> \u7B80\u8FF0\u5E38\u89C1\u7684Atomic\u7C7B</h3><p>\u5728\u5F88\u591A\u65F6\u5019\uFF0C\u6211\u4EEC\u9700\u8981\u7684\u4EC5\u4EC5\u662F\u4E00\u4E2A\u7B80\u5355\u7684\u3001\u9AD8\u6548\u7684\u3001\u7EBF\u7A0B\u5B89\u5168\u7684++\u6216\u8005--\u65B9\u6848\uFF0C\u4F7F\u7528synchronized\u5173\u952E\u5B57\u548Clock\u56FA\u7136\u53EF\u4EE5\u5B9E\u73B0\uFF0C\u4F46\u4EE3\u4EF7\u6BD4\u8F83\u5927\uFF0C\u6B64\u65F6\u7528\u539F\u5B50\u7C7B\u66F4\u52A0\u65B9\u4FBF\u3002\u57FA\u672C\u6570\u636E\u7C7B\u578B\u7684\u539F\u5B50\u7C7B\u6709\uFF1A</p><ul><li>AtomicInteger \u539F\u5B50\u66F4\u65B0\u6574\u578B</li><li>AtomicLong \u539F\u5B50\u66F4\u65B0\u957F\u6574\u578B</li><li>AtomicBoolean \u539F\u5B50\u66F4\u65B0\u5E03\u5C14\u7C7B\u578B</li></ul><p>Atomic\u6570\u7EC4\u7C7B\u578B\u6709\uFF1A</p><ul><li>AtomicIntegerArray \u539F\u5B50\u66F4\u65B0\u6574\u578B\u6570\u7EC4\u91CC\u7684\u5143\u7D20</li><li>AtomicLongArray \u539F\u5B50\u66F4\u65B0\u957F\u6574\u578B\u6570\u7EC4\u91CC\u7684\u5143\u7D20</li><li>AtomicReferenceArray \u539F\u5B50\u66F4\u65B0\u5F15\u7528\u7C7B\u578B\u6570\u7EC4\u91CC\u7684\u5143\u7D20\u3002</li></ul><p>Atomic\u5F15\u7528\u7C7B\u578B\u6709\uFF1A</p><ul><li>AtomicReference \u539F\u5B50\u66F4\u65B0\u5F15\u7528\u7C7B\u578B</li><li>AtomicMarkableReference \u539F\u5B50\u66F4\u65B0\u5E26\u6709\u6807\u8BB0\u4F4D\u7684\u5F15\u7528\u7C7B\u578B\uFF0C\u53EF\u4EE5\u7ED1\u5B9A\u4E00\u4E2A boolean \u6807\u8BB0</li><li>AtomicStampedReference \u539F\u5B50\u66F4\u65B0\u5E26\u6709\u7248\u672C\u53F7\u7684\u5F15\u7528\u7C7B\u578B</li></ul><p>FieldUpdater\u7C7B\u578B\uFF1A</p><ul><li>AtomicIntegerFieldUpdater \u539F\u5B50\u66F4\u65B0\u6574\u578B\u5B57\u6BB5\u7684\u66F4\u65B0\u5668</li><li>AtomicLongFieldUpdater \u539F\u5B50\u66F4\u65B0\u957F\u6574\u578B\u5B57\u6BB5\u7684\u66F4\u65B0\u5668</li><li>AtomicReferenceFieldUpdater \u539F\u5B50\u66F4\u65B0\u5F15\u7528\u7C7B\u578B\u5B57\u6BB5\u7684\u66F4\u65B0\u5668</li></ul><h3 id="\u7B80\u8FF0atomic\u7C7B\u57FA\u672C\u5B9E\u73B0\u539F\u7406" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0atomic\u7C7B\u57FA\u672C\u5B9E\u73B0\u539F\u7406" aria-hidden="true">#</a> \u7B80\u8FF0Atomic\u7C7B\u57FA\u672C\u5B9E\u73B0\u539F\u7406</h3><p>\u4EE5AtomicIntger \u4E3A\u4F8B\u3002</p><p>\u65B9\u6CD5getAndIncrement\uFF0C\u4EE5\u539F\u5B50\u65B9\u5F0F\u5C06\u5F53\u524D\u7684\u503C\u52A01\uFF0C\u5177\u4F53\u5B9E\u73B0\u4E3A\uFF1A</p><ul><li>\u5728 for \u6B7B\u5FAA\u73AF\u4E2D\u53D6\u5F97 AtomicInteger \u91CC\u5B58\u50A8\u7684\u6570\u503C</li><li>\u5BF9 AtomicInteger \u5F53\u524D\u7684\u503C\u52A0 1</li><li>\u8C03\u7528 compareAndSet \u65B9\u6CD5\u8FDB\u884C\u539F\u5B50\u66F4\u65B0</li><li>\u5148\u68C0\u67E5\u5F53\u524D\u6570\u503C\u662F\u5426\u7B49\u4E8E expect</li><li>\u5982\u679C\u7B49\u4E8E\u5219\u8BF4\u660E\u5F53\u524D\u503C\u6CA1\u6709\u88AB\u5176\u4ED6\u7EBF\u7A0B\u4FEE\u6539\uFF0C\u5219\u5C06\u503C\u66F4\u65B0\u4E3A next\uFF0C</li><li>\u5982\u679C\u4E0D\u662F\u4F1A\u66F4\u65B0\u5931\u8D25\u8FD4\u56DE false\uFF0C\u7A0B\u5E8F\u4F1A\u8FDB\u5165 for \u5FAA\u73AF\u91CD\u65B0\u8FDB\u884C compareAndSet \u64CD\u4F5C\u3002</li></ul><h3 id="\u7B80\u8FF0countdownlatch" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0countdownlatch" aria-hidden="true">#</a> \u7B80\u8FF0CountDownLatch</h3><p>CountDownLatch\u8FD9\u4E2A\u7C7B\u4F7F\u4E00\u4E2A\u7EBF\u7A0B\u7B49\u5F85\u5176\u4ED6\u7EBF\u7A0B\u5404\u81EA\u6267\u884C\u5B8C\u6BD5\u540E\u518D\u6267\u884C\u3002\u662F\u901A\u8FC7\u4E00\u4E2A\u8BA1\u6570\u5668\u6765\u5B9E\u73B0\u7684\uFF0C\u8BA1\u6570\u5668\u7684\u521D\u59CB\u503C\u662F\u7EBF\u7A0B\u7684\u6570\u91CF\u3002\u6BCF\u5F53\u4E00\u4E2A\u7EBF\u7A0B\u6267\u884C\u5B8C\u6BD5\u540E\uFF0C\u8C03\u7528countDown\u65B9\u6CD5\uFF0C\u8BA1\u6570\u5668\u7684\u503C\u5C31\u51CF1\uFF0C\u5F53\u8BA1\u6570\u5668\u7684\u503C\u4E3A0\u65F6\uFF0C\u8868\u793A\u6240\u6709\u7EBF\u7A0B\u90FD\u6267\u884C\u5B8C\u6BD5\uFF0C\u7136\u540E\u5728\u7B49\u5F85\u7684\u7EBF\u7A0B\u5C31\u53EF\u4EE5\u6062\u590D\u5DE5\u4F5C\u4E86\u3002\u53EA\u80FD\u4E00\u6B21\u6027\u4F7F\u7528\uFF0C\u4E0D\u80FDreset\u3002</p><h3 id="\u7B80\u8FF0cyclicbarrier" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0cyclicbarrier" aria-hidden="true">#</a> \u7B80\u8FF0CyclicBarrier</h3><p>CyclicBarrier \u4E3B\u8981\u529F\u80FD\u548CCountDownLatch\u7C7B\u4F3C\uFF0C\u4E5F\u662F\u901A\u8FC7\u4E00\u4E2A\u8BA1\u6570\u5668\uFF0C\u4F7F\u4E00\u4E2A\u7EBF\u7A0B\u7B49\u5F85\u5176\u4ED6\u7EBF\u7A0B\u5404\u81EA\u6267\u884C\u5B8C\u6BD5\u540E\u518D\u6267\u884C\u3002\u4F46\u662F\u5176\u53EF\u4EE5\u91CD\u590D\u4F7F\u7528\uFF08reset\uFF09\u3002</p><h3 id="\u7B80\u8FF0semaphore" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0semaphore" aria-hidden="true">#</a> \u7B80\u8FF0Semaphore</h3><p>Semaphore\u5373\u4FE1\u53F7\u91CF\u3002Semaphore \u7684\u6784\u9020\u65B9\u6CD5\u53C2\u6570\u63A5\u6536\u4E00\u4E2A int \u503C\uFF0C\u8BBE\u7F6E\u4E00\u4E2A\u8BA1\u6570\u5668\uFF0C\u8868\u793A\u53EF\u7528\u7684\u8BB8\u53EF\u6570\u91CF\u5373\u6700\u5927\u5E76\u53D1\u6570\u3002\u4F7F\u7528 acquire \u65B9\u6CD5\u83B7\u5F97\u4E00\u4E2A\u8BB8\u53EF\u8BC1\uFF0C\u8BA1\u6570\u5668\u51CF\u4E00\uFF0C\u4F7F\u7528 release \u65B9\u6CD5\u5F52\u8FD8\u8BB8\u53EF\uFF0C\u8BA1\u6570\u5668\u52A0\u4E00\u3002\u5982\u679C\u6B64\u65F6\u8BA1\u6570\u5668\u503C\u4E3A0\uFF0C\u7EBF\u7A0B\u8FDB\u5165\u4F11\u7720\u3002</p><h3 id="\u7B80\u8FF0exchanger" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0exchanger" aria-hidden="true">#</a> \u7B80\u8FF0Exchanger</h3><p>Exchanger\u7C7B\u53EF\u7528\u4E8E\u4E24\u4E2A\u7EBF\u7A0B\u4E4B\u95F4\u4EA4\u6362\u4FE1\u606F\u3002\u53EF\u7B80\u5355\u5730\u5C06Exchanger\u5BF9\u8C61\u7406\u89E3\u4E3A\u4E00\u4E2A\u5305\u542B\u4E24\u4E2A\u683C\u5B50\u7684\u5BB9\u5668\uFF0C\u901A\u8FC7exchanger\u65B9\u6CD5\u53EF\u4EE5\u5411\u4E24\u4E2A\u683C\u5B50\u4E2D\u586B\u5145\u4FE1\u606F\u3002\u7EBF\u7A0B\u901A\u8FC7exchange \u65B9\u6CD5\u4EA4\u6362\u6570\u636E\uFF0C\u7B2C\u4E00\u4E2A\u7EBF\u7A0B\u6267\u884C exchange \u65B9\u6CD5\u540E\u4F1A\u963B\u585E\u7B49\u5F85\u7B2C\u4E8C\u4E2A\u7EBF\u7A0B\u6267\u884C\u8BE5\u65B9\u6CD5\u3002\u5F53\u4E24\u4E2A\u7EBF\u7A0B\u90FD\u5230\u8FBE\u540C\u6B65\u70B9\u65F6\u8FD9\u4E24\u4E2A\u7EBF\u7A0B\u5C31\u53EF\u4EE5\u4EA4\u6362\u6570\u636E\u5F53\u4E24\u4E2A\u683C\u5B50\u4E2D\u7684\u5747\u88AB\u586B\u5145\u65F6\uFF0C\u8BE5\u5BF9\u8C61\u4F1A\u81EA\u52A8\u5C06\u4E24\u4E2A\u683C\u5B50\u7684\u4FE1\u606F\u4EA4\u6362\uFF0C\u7136\u540E\u8FD4\u56DE\u7ED9\u7EBF\u7A0B\uFF0C\u4ECE\u800C\u5B9E\u73B0\u4E24\u4E2A\u7EBF\u7A0B\u7684\u4FE1\u606F\u4EA4\u6362\u3002</p><h3 id="\u7B80\u8FF0concurrenthashmap" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0concurrenthashmap" aria-hidden="true">#</a> \u7B80\u8FF0ConcurrentHashMap</h3><p>JDK7\u91C7\u7528\u9501\u5206\u6BB5\u6280\u672F\u3002\u9996\u5148\u5C06\u6570\u636E\u5206\u6210 Segment \u6570\u636E\u6BB5\uFF0C\u7136\u540E\u7ED9\u6BCF\u4E00\u4E2A\u6570\u636E\u6BB5\u914D\u4E00\u628A\u9501\uFF0C\u5F53\u4E00\u4E2A\u7EBF\u7A0B\u5360\u7528\u9501\u8BBF\u95EE\u5176\u4E2D\u4E00\u4E2A\u6BB5\u7684\u6570\u636E\u65F6\uFF0C\u5176\u4ED6\u6BB5\u7684\u6570\u636E\u4E5F\u80FD\u88AB\u5176\u4ED6\u7EBF\u7A0B\u8BBF\u95EE\u3002</p><p>get \u9664\u8BFB\u5230\u7A7A\u503C\u4E0D\u9700\u8981\u52A0\u9501\u3002\u8BE5\u65B9\u6CD5\u5148\u7ECF\u8FC7\u4E00\u6B21\u518D\u6563\u5217\uFF0C\u518D\u7528\u8FD9\u4E2A\u6563\u5217\u503C\u901A\u8FC7\u6563\u5217\u8FD0\u7B97\u5B9A\u4F4D\u5230 Segment\uFF0C\u6700\u540E\u901A\u8FC7\u6563\u5217\u7B97\u6CD5\u5B9A\u4F4D\u5230\u5143\u7D20\u3002put \u987B\u52A0\u9501\uFF0C\u9996\u5148\u5B9A\u4F4D\u5230 Segment\uFF0C\u7136\u540E\u8FDB\u884C\u63D2\u5165\u64CD\u4F5C\uFF0C\u7B2C\u4E00\u6B65\u5224\u65AD\u662F\u5426\u9700\u8981\u5BF9 Segment \u91CC\u7684 HashEntry \u6570\u7EC4\u8FDB\u884C\u6269\u5BB9\uFF0C\u7B2C\u4E8C\u6B65\u5B9A\u4F4D\u6DFB\u52A0\u5143\u7D20\u7684\u4F4D\u7F6E\uFF0C\u7136\u540E\u5C06\u5176\u653E\u5165\u6570\u7EC4\u3002</p><p>JDK8\u7684\u6539\u8FDB</p><ul><li>\u53D6\u6D88\u5206\u6BB5\u9501\u673A\u5236\uFF0C\u91C7\u7528CAS\u7B97\u6CD5\u8FDB\u884C\u503C\u7684\u8BBE\u7F6E\uFF0C\u5982\u679CCAS\u5931\u8D25\u518D\u4F7F\u7528 synchronized \u52A0\u9501\u6DFB\u52A0\u5143\u7D20</li><li>\u5F15\u5165\u7EA2\u9ED1\u6811\u7ED3\u6784\uFF0C\u5F53\u67D0\u4E2A\u69FD\u5185\u7684\u5143\u7D20\u4E2A\u6570\u8D85\u8FC78\u4E14 Node\u6570\u7EC4 \u5BB9\u91CF\u5927\u4E8E 64 \u65F6\uFF0C\u94FE\u8868\u8F6C\u4E3A\u7EA2\u9ED1\u6811\u3002</li><li>\u4F7F\u7528\u4E86\u66F4\u52A0\u4F18\u5316\u7684\u65B9\u5F0F\u7EDF\u8BA1\u96C6\u5408\u5185\u7684\u5143\u7D20\u6570\u91CF\u3002</li></ul><h3 id="synchronized\u5E95\u5C42\u5B9E\u73B0\u539F\u7406" tabindex="-1"><a class="header-anchor" href="#synchronized\u5E95\u5C42\u5B9E\u73B0\u539F\u7406" aria-hidden="true">#</a> synchronized\u5E95\u5C42\u5B9E\u73B0\u539F\u7406</h3><p>Java \u5BF9\u8C61\u5E95\u5C42\u90FD\u4F1A\u5173\u8054\u4E00\u4E2A monitor\uFF0C\u4F7F\u7528 synchronized \u65F6 JVM \u4F1A\u6839\u636E\u4F7F\u7528\u73AF\u5883\u627E\u5230\u5BF9\u8C61\u7684 monitor\uFF0C\u6839\u636E monitor \u7684\u72B6\u6001\u8FDB\u884C\u52A0\u89E3\u9501\u7684\u5224\u65AD\u3002\u5982\u679C\u6210\u529F\u52A0\u9501\u5C31\u6210\u4E3A\u8BE5 monitor \u7684\u552F\u4E00\u6301\u6709\u8005\uFF0Cmonitor \u5728\u88AB\u91CA\u653E\u524D\u4E0D\u80FD\u518D\u88AB\u5176\u4ED6\u7EBF\u7A0B\u83B7\u53D6\u3002</p><p>synchronized\u5728JVM\u7F16\u8BD1\u540E\u4F1A\u4EA7\u751Fmonitorenter \u548C monitorexit \u8FD9\u4E24\u4E2A\u5B57\u8282\u7801\u6307\u4EE4\uFF0C\u83B7\u53D6\u548C\u91CA\u653E monitor\u3002\u8FD9\u4E24\u4E2A\u5B57\u8282\u7801\u6307\u4EE4\u90FD\u9700\u8981\u4E00\u4E2A\u5F15\u7528\u7C7B\u578B\u7684\u53C2\u6570\u6307\u660E\u8981\u9501\u5B9A\u548C\u89E3\u9501\u7684\u5BF9\u8C61\uFF0C\u5BF9\u4E8E\u540C\u6B65\u666E\u901A\u65B9\u6CD5\uFF0C\u9501\u662F\u5F53\u524D\u5B9E\u4F8B\u5BF9\u8C61\uFF1B\u5BF9\u4E8E\u9759\u6001\u540C\u6B65\u65B9\u6CD5\uFF0C\u9501\u662F\u5F53\u524D\u7C7B\u7684 Class \u5BF9\u8C61\uFF1B\u5BF9\u4E8E\u540C\u6B65\u65B9\u6CD5\u5757\uFF0C\u9501\u662F synchronized \u62EC\u53F7\u91CC\u7684\u5BF9\u8C61\u3002</p><p>\u6267\u884C monitorenter \u6307\u4EE4\u65F6\uFF0C\u9996\u5148\u5C1D\u8BD5\u83B7\u53D6\u5BF9\u8C61\u9501\u3002\u5982\u679C\u8FD9\u4E2A\u5BF9\u8C61\u6CA1\u6709\u88AB\u9501\u5B9A\uFF0C\u6216\u5F53\u524D\u7EBF\u7A0B\u5DF2\u7ECF\u6301\u6709\u9501\uFF0C\u5C31\u628A\u9501\u7684\u8BA1\u6570\u5668\u52A0 1\uFF0C\u6267\u884C monitorexit \u6307\u4EE4\u65F6\u4F1A\u5C06\u9501\u8BA1\u6570\u5668\u51CF 1\u3002\u4E00\u65E6\u8BA1\u6570\u5668\u4E3A 0 \u9501\u968F\u5373\u5C31\u88AB\u91CA\u653E\u3002</p><h3 id="synchronized\u5173\u952E\u8BCD\u4F7F\u7528\u65B9\u6CD5" tabindex="-1"><a class="header-anchor" href="#synchronized\u5173\u952E\u8BCD\u4F7F\u7528\u65B9\u6CD5" aria-hidden="true">#</a> synchronized\u5173\u952E\u8BCD\u4F7F\u7528\u65B9\u6CD5</h3><ul><li>\u76F4\u63A5\u4FEE\u9970\u67D0\u4E2A\u5B9E\u4F8B\u65B9\u6CD5</li><li>\u76F4\u63A5\u4FEE\u9970\u67D0\u4E2A\u9759\u6001\u65B9\u6CD5</li><li>\u4FEE\u9970\u4EE3\u7801\u5757</li></ul><h3 id="\u7B80\u8FF0java\u504F\u5411\u9501" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0java\u504F\u5411\u9501" aria-hidden="true">#</a> \u7B80\u8FF0Java\u504F\u5411\u9501</h3><p>JDK 1.6 \u4E2D\u63D0\u51FA\u4E86\u504F\u5411\u9501\u7684\u6982\u5FF5\u3002\u8BE5\u9501\u63D0\u51FA\u7684\u539F\u56E0\u662F\uFF0C\u5F00\u53D1\u8005\u53D1\u73B0\u591A\u6570\u60C5\u51B5\u4E0B\u9501\u5E76\u4E0D\u5B58\u5728\u7ADE\u4E89\uFF0C\u4E00\u628A\u9501\u5F80\u5F80\u662F\u7531\u540C\u4E00\u4E2A\u7EBF\u7A0B\u83B7\u5F97\u7684\u3002\u504F\u5411\u9501\u5E76\u4E0D\u4F1A\u4E3B\u52A8\u91CA\u653E\uFF0C\u8FD9\u6837\u6BCF\u6B21\u504F\u5411\u9501\u8FDB\u5165\u7684\u65F6\u5019\u90FD\u4F1A\u5224\u65AD\u8BE5\u8D44\u6E90\u662F\u5426\u662F\u504F\u5411\u81EA\u5DF1\u7684\uFF0C\u5982\u679C\u662F\u504F\u5411\u81EA\u5DF1\u7684\u5219\u4E0D\u9700\u8981\u8FDB\u884C\u989D\u5916\u7684\u64CD\u4F5C\uFF0C\u76F4\u63A5\u53EF\u4EE5\u8FDB\u5165\u540C\u6B65\u64CD\u4F5C\u3002</p><p>\u5176\u7533\u8BF7\u6D41\u7A0B\u4E3A\uFF1A</p><ul><li>\u9996\u5148\u9700\u8981\u5224\u65AD\u5BF9\u8C61\u7684 Mark Word \u662F\u5426\u5C5E\u4E8E\u504F\u5411\u6A21\u5F0F\uFF0C\u5982\u679C\u4E0D\u5C5E\u4E8E\uFF0C\u90A3\u5C31\u8FDB\u5165\u8F7B\u91CF\u7EA7\u9501\u5224\u65AD\u903B\u8F91\u3002\u5426\u5219\u7EE7\u7EED\u4E0B\u4E00\u6B65\u5224\u65AD\uFF1B</li><li>\u5224\u65AD\u76EE\u524D\u8BF7\u6C42\u9501\u7684\u7EBF\u7A0B ID \u662F\u5426\u548C\u504F\u5411\u9501\u672C\u8EAB\u8BB0\u5F55\u7684\u7EBF\u7A0B ID \u4E00\u81F4\u3002\u5982\u679C\u4E00\u81F4\uFF0C\u7EE7\u7EED\u4E0B\u4E00\u6B65\u7684\u5224\u65AD\uFF0C\u5982\u679C\u4E0D\u4E00\u81F4\uFF0C\u8DF3\u8F6C\u5230\u6B65\u9AA44\uFF1B</li><li>\u5224\u65AD\u662F\u5426\u9700\u8981\u91CD\u504F\u5411\u3002\u5982\u679C\u4E0D\u7528\u7684\u8BDD\uFF0C\u76F4\u63A5\u83B7\u5F97\u504F\u5411\u9501\uFF1B</li><li>\u5229\u7528 CAS \u7B97\u6CD5\u5C06\u5BF9\u8C61\u7684 Mark Word \u8FDB\u884C\u66F4\u6539\uFF0C\u4F7F\u7EBF\u7A0B ID \u90E8\u5206\u6362\u6210\u672C\u7EBF\u7A0B ID\u3002\u5982\u679C\u66F4\u6362\u6210\u529F\uFF0C\u5219\u91CD\u504F\u5411\u5B8C\u6210\uFF0C\u83B7\u5F97\u504F\u5411\u9501\u3002\u5982\u679C\u5931\u8D25\uFF0C\u5219\u8BF4\u660E\u6709\u591A\u7EBF\u7A0B\u7ADE\u4E89\uFF0C\u5347\u7EA7\u4E3A\u8F7B\u91CF\u7EA7\u9501\u3002</li></ul><h3 id="\u7B80\u8FF0\u8F7B\u91CF\u7EA7\u9501" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0\u8F7B\u91CF\u7EA7\u9501" aria-hidden="true">#</a> \u7B80\u8FF0\u8F7B\u91CF\u7EA7\u9501</h3><p>\u8F7B\u91CF\u7EA7\u9501\u662F\u4E3A\u4E86\u5728\u6CA1\u6709\u7ADE\u4E89\u7684\u524D\u63D0\u4E0B\u51CF\u5C11\u91CD\u91CF\u7EA7\u9501\u51FA\u73B0\u5E76\u5BFC\u81F4\u7684\u6027\u80FD\u6D88\u8017\u3002</p><p>\u5176\u7533\u8BF7\u6D41\u7A0B\u4E3A\uFF1A</p><ul><li>\u5982\u679C\u540C\u6B65\u5BF9\u8C61\u6CA1\u6709\u88AB\u9501\u5B9A\uFF0C\u865A\u62DF\u673A\u5C06\u5728\u5F53\u524D\u7EBF\u7A0B\u7684\u6808\u5E27\u4E2D\u5EFA\u7ACB\u4E00\u4E2A\u9501\u8BB0\u5F55\u7A7A\u95F4\uFF0C\u5B58\u50A8\u9501\u5BF9\u8C61\u76EE\u524D Mark Word \u7684\u62F7\u8D1D\u3002</li><li>\u865A\u62DF\u673A\u4F7F\u7528 CAS \u5C1D\u8BD5\u628A\u5BF9\u8C61\u7684 Mark Word \u66F4\u65B0\u4E3A\u6307\u5411\u9501\u8BB0\u5F55\u7684\u6307\u9488</li><li>\u5982\u679C\u66F4\u65B0\u6210\u529F\u5373\u4EE3\u8868\u8BE5\u7EBF\u7A0B\u62E5\u6709\u4E86\u9501\uFF0C\u9501\u6807\u5FD7\u4F4D\u5C06\u8F6C\u53D8\u4E3A 00\uFF0C\u8868\u793A\u5904\u4E8E\u8F7B\u91CF\u7EA7\u9501\u5B9A\u72B6\u6001\u3002</li><li>\u5982\u679C\u66F4\u65B0\u5931\u8D25\u5C31\u610F\u5473\u7740\u81F3\u5C11\u5B58\u5728\u4E00\u6761\u7EBF\u7A0B\u4E0E\u5F53\u524D\u7EBF\u7A0B\u7ADE\u4E89\u3002\u865A\u62DF\u673A\u68C0\u67E5\u5BF9\u8C61\u7684 Mark Word \u662F\u5426\u6307\u5411\u5F53\u524D\u7EBF\u7A0B\u7684\u6808\u5E27</li><li>\u5982\u679C\u6307\u5411\u5F53\u524D\u7EBF\u7A0B\u7684\u6808\u5E27\uFF0C\u8BF4\u660E\u5F53\u524D\u7EBF\u7A0B\u5DF2\u7ECF\u62E5\u6709\u4E86\u9501\uFF0C\u76F4\u63A5\u8FDB\u5165\u540C\u6B65\u5757\u7EE7\u7EED\u6267\u884C</li><li>\u5982\u679C\u4E0D\u662F\u5219\u8BF4\u660E\u9501\u5BF9\u8C61\u5DF2\u7ECF\u88AB\u5176\u4ED6\u7EBF\u7A0B\u62A2\u5360\u3002</li><li>\u5982\u679C\u51FA\u73B0\u4E24\u6761\u4EE5\u4E0A\u7EBF\u7A0B\u4E89\u7528\u540C\u4E00\u4E2A\u9501\uFF0C\u8F7B\u91CF\u7EA7\u9501\u5C31\u4E0D\u518D\u6709\u6548\uFF0C\u5C06\u81A8\u80C0\u4E3A\u91CD\u91CF\u7EA7\u9501\uFF0C\u9501\u6807\u5FD7\u72B6\u6001\u53D8\u4E3A 10\uFF0C\u6B64\u65F6Mark Word \u5B58\u50A8\u7684\u5C31\u662F\u6307\u5411\u91CD\u91CF\u7EA7\u9501\u7684\u6307\u9488\uFF0C\u540E\u9762\u7B49\u5F85\u9501\u7684\u7EBF\u7A0B\u4E5F\u5FC5\u987B\u963B\u585E\u3002</li></ul><h3 id="\u7B80\u8FF0\u9501\u4F18\u5316\u7B56\u7565" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0\u9501\u4F18\u5316\u7B56\u7565" aria-hidden="true">#</a> \u7B80\u8FF0\u9501\u4F18\u5316\u7B56\u7565</h3><p>\u5373\u81EA\u9002\u5E94\u81EA\u65CB\u3001\u9501\u6D88\u9664\u3001\u9501\u7C97\u5316\u3001\u9501\u5347\u7EA7\u7B49\u7B56\u7565\u504F\u3002</p><h3 id="\u7B80\u8FF0java\u7684\u81EA\u65CB\u9501" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0java\u7684\u81EA\u65CB\u9501" aria-hidden="true">#</a> \u7B80\u8FF0Java\u7684\u81EA\u65CB\u9501</h3><p>\u7EBF\u7A0B\u83B7\u53D6\u9501\u5931\u8D25\u540E\uFF0C\u53EF\u4EE5\u91C7\u7528\u8FD9\u6837\u7684\u7B56\u7565\uFF0C\u53EF\u4EE5\u4E0D\u653E\u5F03 CPU \uFF0C\u4E0D\u505C\u7684\u91CD\u8BD5\u5185\u91CD\u8BD5\uFF0C\u8FD9\u79CD\u64CD\u4F5C\u4E5F\u79F0\u4E3A\u81EA\u65CB\u9501\u3002</p><h3 id="\u7B80\u8FF0\u81EA\u9002\u5E94\u81EA\u65CB\u9501" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0\u81EA\u9002\u5E94\u81EA\u65CB\u9501" aria-hidden="true">#</a> \u7B80\u8FF0\u81EA\u9002\u5E94\u81EA\u65CB\u9501</h3><p>\u81EA\u9002\u5E94\u81EA\u65CB\u9501\u81EA\u65CB\u6B21\u6570\u4E0D\u518D\u4EBA\u4E3A\u8BBE\u5B9A\uFF0C\u901A\u5E38\u7531\u524D\u4E00\u6B21\u5728\u540C\u4E00\u4E2A\u9501\u4E0A\u7684\u81EA\u65CB\u65F6\u95F4\u53CA\u9501\u7684\u62E5\u6709\u8005\u7684\u72B6\u6001\u51B3\u5B9A\u3002</p><h3 id="\u7B80\u8FF0\u9501\u7C97\u5316" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0\u9501\u7C97\u5316" aria-hidden="true">#</a> \u7B80\u8FF0\u9501\u7C97\u5316</h3><p>\u9501\u7C97\u5316\u7684\u601D\u60F3\u5C31\u662F\u6269\u5927\u52A0\u9501\u8303\u56F4\uFF0C\u907F\u514D\u53CD\u590D\u7684\u52A0\u9501\u548C\u89E3\u9501\u3002</p><h3 id="\u7B80\u8FF0\u9501\u6D88\u9664" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0\u9501\u6D88\u9664" aria-hidden="true">#</a> \u7B80\u8FF0\u9501\u6D88\u9664</h3><p>\u9501\u6D88\u9664\u662F\u4E00\u79CD\u66F4\u4E3A\u5F7B\u5E95\u7684\u4F18\u5316\uFF0C\u5728\u7F16\u8BD1\u65F6\uFF0CJava\u7F16\u8BD1\u5668\u5BF9\u8FD0\u884C\u4E0A\u4E0B\u6587\u8FDB\u884C\u626B\u63CF\uFF0C\u53BB\u9664\u4E0D\u53EF\u80FD\u5B58\u5728\u5171\u4EAB\u8D44\u6E90\u7ADE\u4E89\u7684\u9501\u3002</p><h3 id="\u7B80\u8FF0lock\u4E0Ereentrantlock" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0lock\u4E0Ereentrantlock" aria-hidden="true">#</a> \u7B80\u8FF0Lock\u4E0EReentrantLock</h3><p>Lock\u63A5\u53E3\u662F Java\u5E76\u53D1\u5305\u7684\u9876\u5C42\u63A5\u53E3\u3002</p><p>\u53EF\u91CD\u5165\u9501 ReentrantLock \u662F Lock \u6700\u5E38\u89C1\u7684\u5B9E\u73B0\uFF0C\u4E0E synchronized \u4E00\u6837\u53EF\u91CD\u5165\u3002ReentrantLock \u5728\u9ED8\u8BA4\u60C5\u51B5\u4E0B\u662F\u975E\u516C\u5E73\u7684\uFF0C\u53EF\u4EE5\u901A\u8FC7\u6784\u9020\u65B9\u6CD5\u6307\u5B9A\u516C\u5E73\u9501\u3002\u4E00\u65E6\u4F7F\u7528\u4E86\u516C\u5E73\u9501\uFF0C\u6027\u80FD\u4F1A\u4E0B\u964D\u3002</p><h3 id="\u7B80\u8FF0aqs" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0aqs" aria-hidden="true">#</a> \u7B80\u8FF0AQS</h3><p>AQS\uFF08AbstractQuenedSynchronizer\uFF09\u62BD\u8C61\u7684\u961F\u5217\u5F0F\u540C\u6B65\u5668\u3002AQS\u662F\u5C06\u6BCF\u4E00\u6761\u8BF7\u6C42\u5171\u4EAB\u8D44\u6E90\u7684\u7EBF\u7A0B\u5C01\u88C5\u6210\u4E00\u4E2A\u9501\u961F\u5217\u7684\u4E00\u4E2A\u7ED3\u70B9\uFF08Node\uFF09\uFF0C\u6765\u5B9E\u73B0\u9501\u7684\u5206\u914D\u3002AQS\u662F\u7528\u6765\u6784\u5EFA\u9501\u6216\u5176\u4ED6\u540C\u6B65\u7EC4\u4EF6\u7684\u57FA\u7840\u6846\u67B6\uFF0C\u5B83\u4F7F\u7528\u4E00\u4E2A volatile int state \u53D8\u91CF\u4F5C\u4E3A\u5171\u4EAB\u8D44\u6E90\uFF0C\u5982\u679C\u7EBF\u7A0B\u83B7\u53D6\u8D44\u6E90\u5931\u8D25\uFF0C\u5219\u8FDB\u5165\u540C\u6B65\u961F\u5217\u7B49\u5F85\uFF1B\u5982\u679C\u83B7\u53D6\u6210\u529F\u5C31\u6267\u884C\u4E34\u754C\u533A\u4EE3\u7801\uFF0C\u91CA\u653E\u8D44\u6E90\u65F6\u4F1A\u901A\u77E5\u540C\u6B65\u961F\u5217\u4E2D\u7684\u7B49\u5F85\u7EBF\u7A0B\u3002</p><p>\u5B50\u7C7B\u901A\u8FC7\u7EE7\u627F\u540C\u6B65\u5668\u5E76\u5B9E\u73B0\u5B83\u7684\u62BD\u8C61\u65B9\u6CD5getState\u3001setState \u548C compareAndSetState\u5BF9\u540C\u6B65\u72B6\u6001\u8FDB\u884C\u66F4\u6539\u3002</p><p>AQS\u83B7\u53D6\u72EC\u5360\u9501/\u91CA\u653E\u72EC\u5360\u9501\u539F\u7406\uFF1A</p><p>\u83B7\u53D6\uFF1A\uFF08acquire\uFF09</p><ul><li>\u8C03\u7528 tryAcquire \u65B9\u6CD5\u5B89\u5168\u5730\u83B7\u53D6\u7EBF\u7A0B\u540C\u6B65\u72B6\u6001\uFF0C\u83B7\u53D6\u5931\u8D25\u7684\u7EBF\u7A0B\u4F1A\u88AB\u6784\u9020\u540C\u6B65\u8282\u70B9\u5E76\u901A\u8FC7 addWaiter \u65B9\u6CD5\u52A0\u5165\u5230\u540C\u6B65\u961F\u5217\u7684\u5C3E\u90E8\uFF0C\u5728\u961F\u5217\u4E2D\u81EA\u65CB\u3002</li><li>\u8C03\u7528 acquireQueued \u65B9\u6CD5\u4F7F\u5F97\u8BE5\u8282\u70B9\u4EE5\u6B7B\u5FAA\u73AF\u7684\u65B9\u5F0F\u83B7\u53D6\u540C\u6B65\u72B6\u6001\uFF0C\u5982\u679C\u83B7\u53D6\u4E0D\u5230\u5219\u963B\u585E\u3002</li></ul><p>\u91CA\u653E\uFF1A\uFF08release\uFF09</p><ul><li>\u8C03\u7528 tryRelease \u65B9\u6CD5\u91CA\u653E\u540C\u6B65\u72B6\u6001</li><li>\u8C03\u7528 unparkSuccessor \u65B9\u6CD5\u5524\u9192\u5934\u8282\u70B9\u7684\u540E\u7EE7\u8282\u70B9\uFF0C\u4F7F\u540E\u7EE7\u8282\u70B9\u91CD\u65B0\u5C1D\u8BD5\u83B7\u53D6\u540C\u6B65\u72B6\u6001\u3002</li></ul><p>AQS\u83B7\u53D6\u5171\u4EAB\u9501/\u91CA\u653E\u5171\u4EAB\u9501\u539F\u7406</p><p>\u83B7\u53D6\u9501\uFF08acquireShared\uFF09</p><ul><li>\u8C03\u7528 tryAcquireShared \u65B9\u6CD5\u5C1D\u8BD5\u83B7\u53D6\u540C\u6B65\u72B6\u6001\uFF0C\u8FD4\u56DE\u503C\u4E0D\u5C0F\u4E8E 0 \u8868\u793A\u80FD\u83B7\u53D6\u540C\u6B65\u72B6\u6001\u3002</li><li>\u91CA\u653E\uFF08releaseShared\uFF09\uFF0C\u5E76\u5524\u9192\u540E\u7EED\u5904\u4E8E\u7B49\u5F85\u72B6\u6001\u7684\u8282\u70B9\u3002</li></ul><hr>',127),s=a("\u6295\u7A3F\u4F5C\u8005\uFF1A\u540E\u7AEF\u6280\u672F\u5C0F\u725B\u8BF4 \u8F6C\u8F7D\u94FE\u63A5\uFF1A"),u={href:"https://mp.weixin.qq.com/s/PmeH38qWVxyIhBpsAsjG7w",target:"_blank",rel:"noopener noreferrer"},p=a("https://mp.weixin.qq.com/s/PmeH38qWVxyIhBpsAsjG7w"),x=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png",alt:""})],-1);function m(f,b){const i=l("ExternalLinkIcon");return h(),n("div",null,[c,e("p",null,[s,e("a",u,[p,d(i)])]),x])}var S=r(o,[["render",m],["__file","java-thread.html.vue"]]);export{S as default};
diff --git a/dist/assets/java-unicode.html.17dea1e9.js b/dist/assets/java-unicode.html.c63853a0.js
similarity index 99%
rename from dist/assets/java-unicode.html.17dea1e9.js
rename to dist/assets/java-unicode.html.c63853a0.js
index 3eddbcf6..4458c7d9 100644
--- a/dist/assets/java-unicode.html.17dea1e9.js
+++ b/dist/assets/java-unicode.html.c63853a0.js
@@ -1,4 +1,4 @@
-import{_ as p}from"./plugin-vue_export-helper.21dcd24c.js";import{r as o,o as c,c as i,a as s,b as t,d as n,e}from"./app.a0271b9c.js";const l={},r=s("h1",{id:"\u5F7B\u5E95\u5F04\u61C2java\u4E2D\u7684unicode\u548Cutf-8\u7F16\u7801",tabindex:"-1"},[s("a",{class:"header-anchor",href:"#\u5F7B\u5E95\u5F04\u61C2java\u4E2D\u7684unicode\u548Cutf-8\u7F16\u7801","aria-hidden":"true"},"#"),n(" \u5F7B\u5E95\u5F04\u61C2Java\u4E2D\u7684Unicode\u548CUTF-8\u7F16\u7801")],-1),u=n("\u201C\u4E8C\u54E5\uFF0C"),d={href:"https://mp.weixin.qq.com/s/twim3w_dp5ctCigjLGIbFw",target:"_blank",rel:"noopener noreferrer"},k=n("\u4E0A\u4E00\u7BC7"),m=n("\u6587\u7AE0\u4E2D\u63D0\u5230\u4E86 Unicode\uFF0C\u8BF4 Java \u4E2D\u7684 char \u7C7B\u578B\u4E4B\u6240\u4EE5\u5360 2 \u4E2A\u5B57\u8282\uFF0C\u662F\u56E0\u4E3A Java \u4F7F\u7528\u7684\u662F Unicode \u5B57\u7B26\u96C6\u800C\u4E0D\u662F ASCII \u5B57\u7B26\u96C6\uFF0C\u6211\u6709\u70B9\u8FF7\uFF0C\u60F3\u4E86\u89E3\u4E00\u4E0B\uFF0C\u80FD\u7EC6\u81F4\u7ED9\u6211\u8BF4\u8BF4\u5417\uFF1F\u201D"),x=e('<p>\u201C\u5F53\u7136\u6CA1\u95EE\u9898\u554A\uFF0C\u4E09\u59B9\u3002\u201D</p><p><strong>1\uFF09ASCII</strong></p><p>\u5BF9\u4E8E\u8BA1\u7B97\u673A\u6765\u8BF4\uFF0C\u53EA\u8BA4 0 \u548C 1\uFF0C\u6240\u6709\u7684\u4FE1\u606F\u6700\u7EC8\u90FD\u662F\u4E00\u4E2A\u4E8C\u8FDB\u5236\u6570\u3002\u4E00\u4E2A\u4E8C\u8FDB\u5236\u6570\u8981\u4E48\u662F 0\uFF0C\u8981\u4E48\u662F 1\uFF0C\u6240\u4EE5 8 \u4E2A\u4E8C\u8FDB\u5236\u6570\u653E\u5728\u4E00\u8D77\uFF08\u4E00\u4E2A\u5B57\u8282\uFF09\uFF0C\u5C31\u4F1A\u7EC4\u5408\u51FA 256 \u79CD\u72B6\u6001\uFF0C\u4E5F\u5C31\u662F 2 \u7684 8 \u6B21\u65B9\uFF08<code>2^8</code>\uFF09\uFF0C\u4ECE 00000000 \u5230 11111111\u3002</p><p>ASCII \u7801\u7531\u7535\u62A5\u7801\u53D1\u5C55\u800C\u6765\uFF0C\u7B2C\u4E00\u7248\u6807\u51C6\u53D1\u5E03\u4E8E 1963 \u5E74\uFF0C\u6700\u540E\u4E00\u6B21\u66F4\u65B0\u5219\u662F\u57281986 \u5E74\uFF0C\u81F3\u4ECA\u4E3A\u6B62\u5171\u5B9A\u4E49\u4E86 128 \u4E2A\u5B57\u7B26\u3002\u5176\u4E2D 33 \u4E2A\u5B57\u7B26\u65E0\u6CD5\u663E\u793A\u5728\u4E00\u822C\u7684\u8BBE\u5907\u4E0A\uFF0C\u9700\u8981\u7528\u7279\u6B8A\u7684\u8BBE\u5907\u624D\u80FD\u663E\u793A\u3002</p><p>ASCII \u7801\u7684\u5C40\u9650\u5728\u4E8E\u53EA\u80FD\u663E\u793A 26 \u4E2A\u57FA\u672C\u62C9\u4E01\u5B57\u6BCD\u3001\u963F\u62C9\u4F2F\u6570\u5B57\u548C\u82F1\u5F0F\u6807\u70B9\u7B26\u53F7\uFF0C\u56E0\u6B64\u53EA\u80FD\u7528\u4E8E\u663E\u793A\u73B0\u4EE3\u7F8E\u56FD\u82F1\u8BED\uFF0C\u5BF9\u4E8E\u5176\u4ED6\u4E00\u4E9B\u8BED\u8A00\u5219\u65E0\u80FD\u65E0\u529B\uFF0C\u6BD4\u5982\u5728\u6CD5\u8BED\u4E2D\uFF0C\u5B57\u6BCD\u4E0A\u65B9\u6709\u6CE8\u97F3\u7B26\u53F7\uFF0C\u5B83\u5C31\u65E0\u6CD5\u7528 ASCII \u7801\u8868\u793A\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/core-points/ten-01.png" alt=""></p><p>PS\uFF1A\u62C9\u4E01\u5B57\u6BCD\uFF08\u4E5F\u79F0\u4E3A\u7F57\u9A6C\u5B57\u6BCD\uFF09\u662F\u591A\u6570\u6B27\u6D32\u8BED\u8A00\u91C7\u7528\u7684\u5B57\u6BCD\u7CFB\u7EDF\uFF0C\u662F\u4E16\u754C\u4E0A\u6700\u901A\u884C\u7684\u5B57\u6BCD\u6587\u5B57\u7CFB\u7EDF\uFF0C\u662F\u7F57\u9A6C\u6587\u660E\u7684\u6210\u679C\u4E4B\u4E00\u3002</p><p>\u867D\u7136\u540D\u79F0\u4E0A\u53EB\u4F5C\u62C9\u4E01\u5B57\u6BCD\uFF0C\u4F46\u62C9\u4E01\u6587\u4E2D\u5E76\u6CA1\u6709\u7528 J\u3001U \u548C W \u8FD9\u4E09\u4E2A\u5B57\u6BCD\u3002</p><p>\u5728\u6211\u4EEC\u7684\u5370\u8C61\u4E2D\uFF0C\u53EF\u80FD\u8BF4\u62C9\u4E01\u5B57\u6BCD\u591A\u5C11\u6709\u4E9B\u964C\u751F\uFF0C\u8BF4\u82F1\u8BED\u5B57\u6BCD\u53EF\u80FD\u5C31\u6709\u76F4\u89C2\u7684\u5370\u8C61\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/core-points/ten-02.png" alt=""></p><p>PPS\uFF1A\u963F\u62C9\u4F2F\u6570\u5B57\uFF0C\u6211\u4EEC\u90FD\u5F88\u719F\u6089\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/core-points/ten-03.png" alt=""></p><p>\u4F46\u662F\uFF0C\u963F\u62C9\u4F2F\u6570\u5B57\u5E76\u975E\u8D77\u6E90\u4E8E\u963F\u62C9\u4F2F\uFF0C\u800C\u662F\u8D77\u6E90\u4E8E\u53E4\u5370\u5EA6\u3002\u5B66\u8FC7\u5386\u53F2\u7684\u6211\u4EEC\u5E94\u8BE5\u6709\u4E00\u4E9B\u5370\u8C61\uFF0C\u963F\u62C9\u4F2F\u5206\u5E03\u4E8E\u897F\u4E9A\u548C\u5317\u975E\uFF0C\u4EE5\u963F\u62C9\u4F2F\u8BED\u4E3A\u4E3B\u8981\u8BED\u8A00\uFF0C\u4EE5\u4F0A\u65AF\u5170\u6559\u4E3A\u4E3B\u8981\u4FE1\u4EF0\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/core-points/ten-04.png" alt=""></p><p>\u5904\u5728\u8FD9\u6837\u7684\u5730\u7406\u4F4D\u7F6E\uFF0C\u505A\u8D77\u4E1C\u4E9A\u548C\u6B27\u6D32\u7684\u4E00\u4E9B\u751F\u610F\u5C31\u5F88\u6709\u4F18\u52BF\uFF0C\u4E8E\u662F\u963F\u62C9\u4F2F\u6570\u5B57\u5C31\u7531\u963F\u62C9\u4F2F\u4EBA\u4F20\u5230\u4E86\u6B27\u6D32\uFF0C\u56E0\u6B64\u5F97\u540D\u3002</p><p>PPPS\uFF1A\u82F1\u5F0F\u6807\u70B9\u7B26\u53F7\uFF0C\u4E5F\u53EB\u82F1\u6587\u6807\u70B9\u7B26\u53F7\uFF0C\u548C\u4E2D\u6587\u6807\u70B9\u7B26\u53F7\u5F88\u76F8\u8FD1\u3002\u6807\u70B9\u7B26\u53F7\u662F\u8F85\u52A9\u6587\u5B57\u8BB0\u5F55\u8BED\u8A00\u7684\u7B26\u53F7\uFF0C\u662F\u4E66\u9762\u8BED\u7684\u7EC4\u6210\u90E8\u5206\uFF0C\u7528\u6765\u8868\u793A\u505C\u987F\u3001\u52A0\u5F3A\u8BED\u6C14\u7B49\u3002</p><p>\u82F1\u6587\u6807\u70B9\u7B26\u53F7\u5728 16 \u4E16\u7EAA\u65F6\uFF0C\u5206\u4E3A\u6717\u8BF5\u5B66\u6D3E\u548C\u53E5\u6CD5\u5B66\u6D3E\uFF0C\u4E3B\u8981\u7531\u53E4\u5178\u65F6\u671F\u7684\u5E0C\u814A\u6587\u548C\u62C9\u4E01\u6587\u6F14\u53D8\u800C\u6765\uFF0C\u5728 17 \u4E16\u7EAA\u540E\u8FDB\u5165\u7A33\u5B9A\u9636\u6BB5\u3002\u4FC4\u6587\u7684\u6807\u70B9\u7B26\u53F7\u4F9D\u636E\u5E0C\u814A\u6587\u800C\u6765\uFF0C\u5230\u4E86 18 \u4E16\u7EAA\u540E\u4E5F\u91C7\u7528\u4E86\u82F1\u6587\u6807\u70B9\u7B26\u53F7\u3002</p><p>\u5728\u5F88\u591A\u4EBA\u7684\u5370\u8C61\u4E2D\uFF0C\u53E4\u6587\u662F\u6CA1\u6709\u6807\u70B9\u7B26\u53F7\u7684\uFF0C\u4F46\u7BA1\u9521\u534E\u535A\u58EB\u7814\u7A76\u6307\u51FA\uFF0C\u4E2D\u56FD\u65E9\u5728\u5148\u79E6\u65F6\u4EE3\u5C31\u6709\u6807\u70B9\u7B26\u53F7\u4E86\uFF0C\u540E\u6765\u878D\u5408\u4E86\u4E00\u4E9B\u82F1\u6587\u6807\u70B9\u7B26\u53F7\u540E\uFF0C\u9010\u6E10\u5F62\u6210\u4E86\u73B0\u5728\u7684\u4E2D\u6587\u6807\u70B9\u7B26\u53F7\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/core-points/ten-05.png" alt=""></p><p><strong>2\uFF09Unicode</strong></p><p>\u8FD9\u4E2A\u4E16\u754C\u4E0A\uFF0C\u9664\u4E86\u82F1\u8BED\uFF0C\u8FD8\u6709\u6CD5\u8BED\u3001\u8461\u8404\u7259\u8BED\u3001\u897F\u73ED\u7259\u8BED\u3001\u5FB7\u8BED\u3001\u4FC4\u8BED\u3001\u963F\u62C9\u4F2F\u8BED\u3001\u97E9\u8BED\u3001\u65E5\u8BED\u7B49\u7B49\u7B49\u7B49\u3002ASCII \u7801\u7528\u6765\u8868\u793A\u82F1\u8BED\u662F\u7EF0\u7EF0\u6709\u4F59\u7684\uFF0C\u4F46\u5176\u4ED6\u8FD9\u4E9B\u8BED\u8A00\u5C31\u6CA1\u529E\u6CD5\u4E86\u3002</p><p>\u50CF\u6211\u4EEC\u7684\u6BCD\u8BED\uFF0C\u535A\u5927\u7CBE\u6DF1\uFF0C\u6C49\u5B57\u7684\u6570\u91CF\u5F88\u591A\u5F88\u591A\uFF0C\u4E1C\u6C49\u7684\u300A\u8BF4\u6587\u89E3\u5B57\u300B\u6536\u5B57 9353 \u4E2A\uFF0C\u6E05\u671D\u300A\u5EB7\u7199\u5B57\u5178\u300B\u6536\u5B57 47035 \u4E2A\uFF0C\u5F53\u4EE3\u7684\u300A\u6C49\u8BED\u5927\u5B57\u5178\u300B\u6536\u5B57 60370 \u4E2A\u30021994 \u5E74\u4E2D\u534E\u4E66\u5C40\u3001\u4E2D\u56FD\u53CB\u8C0A\u51FA\u7248\u516C\u53F8\u51FA\u7248\u7684\u300A\u4E2D\u534E\u5B57\u6D77\u300B\u6536\u5B57 85568 \u4E2A\u3002</p><p>PS\uFF1A\u5E38\u7528\u5B57\u5927\u6982 2500 \u4E2A\uFF0C\u6B21\u5E38\u7528\u5B57 1000 \u4E2A\u3002</p><p>\u4E00\u4E2A\u5B57\u8282\u53EA\u80FD\u8868\u793A 256 \u79CD\u7B26\u53F7\uFF0C\u6240\u4EE5\u5982\u679C\u62FF ASCII \u7801\u6765\u8868\u793A\u6C49\u5B57\u7684\u8BDD\uFF0C\u662F\u8FDC\u8FDC\u4E0D\u591F\u7528\u7684\uFF0C\u90A3\u5C31\u5FC5\u987B\u8981\u7528\u66F4\u591A\u7684\u5B57\u8282\u3002\u7B80\u4F53\u4E2D\u6587\u5E38\u89C1\u7684\u7F16\u7801\u65B9\u5F0F\u662F GB2312\uFF0C\u4F7F\u7528\u4E24\u4E2A\u5B57\u8282\u8868\u793A\u4E00\u4E2A\u6C49\u5B57\uFF0C\u7406\u8BBA\u4E0A\u6700\u591A\u53EF\u4EE5\u8868\u793A 256 x 256 = 65536 \u4E2A\u7B26\u53F7\u3002</p><p>\u8981\u77E5\u9053\uFF0C\u4E16\u754C\u4E0A\u5B58\u5728\u7740\u591A\u79CD\u7F16\u7801\u65B9\u5F0F\uFF0C\u540C\u4E00\u4E2A\u4E8C\u8FDB\u5236\u6570\u5B57\u53EF\u4EE5\u88AB\u89E3\u91CA\u6210\u4E0D\u540C\u7684\u7B26\u53F7\u3002\u56E0\u6B64\uFF0C\u8981\u60F3\u6253\u5F00\u4E00\u4E2A\u6587\u672C\u6587\u4EF6\uFF0C\u5C31\u5FC5\u987B\u77E5\u9053\u5B83\u7684\u7F16\u7801\u65B9\u5F0F\uFF0C\u5426\u5219\u7528\u9519\u8BEF\u7684\u7F16\u7801\u65B9\u5F0F\u89E3\u8BFB\uFF0C\u5C31\u4F1A\u51FA\u73B0\u4E71\u7801\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/core-points/ten-06.png" alt=""></p><p>PPS\uFF1A\u8FD9\u201C\u951F\u65A4\u62F7\u201D\u4EF7\u683C\u633A\u516C\u9053\u7684\u554A\uFF01\uFF01\uFF01\uFF08\u9003</p><p>\u5982\u679C\u6709\u4E00\u79CD\u7F16\u7801\uFF0C\u5C06\u4E16\u754C\u4E0A\u6240\u6709\u7684\u7B26\u53F7\u90FD\u7EB3\u5165\u5176\u4E2D\u3002\u6BCF\u4E00\u4E2A\u7B26\u53F7\u90FD\u7ED9\u4E88\u4E00\u4E2A\u72EC\u4E00\u65E0\u4E8C\u7684\u7F16\u7801\uFF0C\u90A3\u4E48\u4E71\u7801\u95EE\u9898\u5C31\u4F1A\u5F7B\u5E95\u6D88\u5931\u3002</p><p>\u8FD9\u4E2A\u8270\u5DE8\u7684\u4EFB\u52A1\u6709\u8C01\u6765\u5B8C\u6210\u5462\uFF1F<strong>Unicode</strong>\uFF0C\u4E2D\u6587\u8BD1\u4F5C\u4E07\u56FD\u7801\u3001\u56FD\u9645\u7801\u3001\u7EDF\u4E00\u7801\u3001\u5355\u4E00\u7801\uFF0C\u5C31\u50CF\u5B83\u7684\u540D\u5B57\u90FD\u8868\u793A\u7684\uFF0C\u8FD9\u662F\u4E00\u79CD\u6240\u6709\u7B26\u53F7\u7684\u7F16\u7801\u3002</p><p>Unicode \u81F3\u4ECA\u4ECD\u5728\u4E0D\u65AD\u589E\u4FEE\uFF0C\u6BCF\u4E2A\u65B0\u7248\u672C\u90FD\u4F1A\u52A0\u5165\u66F4\u591A\u65B0\u7684\u5B57\u7B26\u3002\u76EE\u524D\u6700\u65B0\u7684\u7248\u672C\u4E3A 2020 \u5E74 3 \u6708\u516C\u5E03\u7684 13.0\uFF0C\u6536\u5F55\u4E86 13 \u4E07\u4E2A\u5B57\u7B26\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/core-points/ten-07.png" alt=""></p><p>Unicode \u662F\u4E00\u4E2A\u5F88\u5927\u7684\u96C6\u5408\uFF0C\u73B0\u5728\u7684\u89C4\u6A21\u53EF\u4EE5\u5BB9\u7EB3 100 \u591A\u4E07\u4E2A\u7B26\u53F7\u3002\u6BCF\u4E2A\u7B26\u53F7\u7684\u7F16\u7801\u90FD\u4E0D\u4E00\u6837\uFF0C\u6BD4\u5982\uFF0C<code>U+0639</code>\u8868\u793A\u963F\u62C9\u4F2F\u5B57\u6BCD <code>Ain</code>\uFF0C<code>U+0041</code> \u8868\u793A\u82F1\u8BED\u7684\u5927\u5199\u5B57\u6BCD <code>A</code>\uFF0C<code>U+4E25</code> \u8868\u793A\u6C49\u5B57<code>\u4E25</code>\u3002</p>',32),b=n("\u5177\u4F53\u7684\u7B26\u53F7\u5BF9\u5E94\u8868\uFF0C\u53EF\u4EE5\u67E5\u8BE2 "),v={href:"http://www.unicode.org/",target:"_blank",rel:"noopener noreferrer"},g=n("unicode.org"),h=n("\uFF0C\u6216\u8005\u4E13\u95E8\u7684"),_={href:"http://www.chi2ko.com/tool/CJK.htm",target:"_blank",rel:"noopener noreferrer"},f=n("\u6C49\u5B57\u5BF9\u5E94\u8868"),U=n("\u3002"),F=e(`<p>\u66FE\u6709\u4EBA\u8FD9\u6837\u8BF4\uFF1A</p><blockquote><p>Unicode \u652F\u6301\u7684\u5B57\u7B26\u4E0A\u9650\u662F 65536 \u4E2A\uFF0CUnicode \u5B57\u7B26\u5FC5\u987B\u5360\u4E24\u4E2A\u5B57\u8282\u3002</p></blockquote><p>\u4F46\u8FD9\u662F\u4E00\u79CD\u8BEF\u89E3\uFF0C\u8BB0\u4F4F\uFF0CUnicode \u53EA\u662F\u4E00\u4E2A\u7528\u6765\u6620\u5C04\u5B57\u7B26\u548C\u6570\u5B57\u7684\u6807\u51C6\u3002\u5B83\u5BF9\u652F\u6301\u5B57\u7B26\u7684\u6570\u91CF\u6CA1\u6709\u9650\u5236\uFF0C\u4E5F\u4E0D\u8981\u6C42\u5B57\u7B26\u5FC5\u987B\u5360\u4E24\u4E2A\u3001\u4E09\u4E2A\u6216\u8005\u5176\u5B83\u4EFB\u610F\u6570\u91CF\u7684\u5B57\u8282\uFF0C\u6240\u4EE5\u5B83\u53EF\u4EE5\u65E0\u7A77\u5927\u3002</p><p>Unicode \u867D\u7136\u7EDF\u4E00\u4E86\u5168\u4E16\u754C\u5B57\u7B26\u7684\u7F16\u7801\uFF0C\u4F46\u6CA1\u6709\u89C4\u5B9A\u5982\u4F55\u5B58\u50A8\u3002\u5982\u679C\u7EDF\u4E00\u89C4\u5B9A\u7684\u8BDD\uFF0C\u6BCF\u4E2A\u7B26\u53F7\u5C31\u8981\u7528 3 \u4E2A\u6216 4 \u4E2A\u5B57\u8282\u8868\u793A\uFF0C\u56E0\u4E3A 2 \u4E2A\u5B57\u8282\u53EA\u80FD\u8868\u793A 65536 \u4E2A\uFF0C\u6839\u672C\u8868\u793A\u4E0D\u5168\u3002</p><p>\u90A3\u600E\u4E48\u529E\u5462\uFF1F</p><p>UTF\uFF08Unicode Transformation Formats\uFF0CUnicode \u7684\u7F16\u7801\u65B9\u5F0F\uFF09\u6765\u4E86\uFF01\u6700\u5E38\u89C1\u7684\u5C31\u662F UTF-8 \u548C UTF-16\u3002</p><p>\u5728 UTF-8 \u4E2D\uFF0C0-127 \u53F7\u7684\u5B57\u7B26\u7528 1 \u4E2A\u5B57\u8282\u6765\u8868\u793A\uFF0C\u4F7F\u7528\u548C ASCII \u76F8\u540C\u7684\u7F16\u7801\u3002\u53EA\u6709 128 \u53F7\u53CA\u4EE5\u4E0A\u7684\u5B57\u7B26\u624D\u7528 2 \u4E2A\u30013 \u4E2A\u6216\u8005 4 \u4E2A\u5B57\u8282\u6765\u8868\u793A\u3002</p><p>\u5982\u679C\u53EA\u6709\u4E00\u4E2A\u5B57\u8282\uFF0C\u90A3\u4E48\u6700\u9AD8\u7684\u6BD4\u7279\u4F4D\u4E3A 0\uFF1B\u5982\u679C\u6709\u591A\u4E2A\u5B57\u8282\uFF0C\u90A3\u4E48\u7B2C\u4E00\u4E2A\u5B57\u8282\u4ECE\u6700\u9AD8\u4F4D\u5F00\u59CB\uFF0C\u8FDE\u7EED\u6709\u51E0\u4E2A\u6BD4\u7279\u4F4D\u7684\u503C\u4E3A 1\uFF0C\u5C31\u4F7F\u7528\u51E0\u4E2A\u5B57\u8282\u7F16\u7801\uFF0C\u5269\u4E0B\u7684\u5B57\u8282\u5747\u4EE5 10 \u5F00\u5934\u3002</p><p>\u5177\u4F53\u7684\u8868\u73B0\u5F62\u5F0F\u4E3A\uFF1A</p><p>0xxxxxxx\uFF1A\u4E00\u4E2A\u5B57\u8282\uFF1B 110xxxxx 10xxxxxx\uFF1A\u4E24\u4E2A\u5B57\u8282\u7F16\u7801\u5F62\u5F0F\uFF08\u5F00\u59CB\u4E24\u4E2A 1\uFF09\uFF1B 1110xxxx 10xxxxxx 10xxxxxx\uFF1A\u4E09\u5B57\u8282\u7F16\u7801\u5F62\u5F0F\uFF08\u5F00\u59CB\u4E09\u4E2A 1\uFF09\uFF1B 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx\uFF1A\u56DB\u5B57\u8282\u7F16\u7801\u5F62\u5F0F\uFF08\u5F00\u59CB\u56DB\u4E2A 1\uFF09\u3002</p><p>\u4E5F\u5C31\u662F\u8BF4\uFF0CUTF-8 \u662F\u4E00\u79CD\u53EF\u53D8\u957F\u5EA6\u7684\u7F16\u7801\u65B9\u5F0F\u2014\u2014\u8FD9\u662F\u5B83\u7684\u4F18\u52BF\u4E5F\u662F\u52A3\u52BF\u3002</p><p>\u600E\u4E48\u8BB2\u5462\uFF1F\u4F18\u52BF\u5C31\u662F\u5B83\u5305\u7F57\u4E07\u8C61\uFF0C\u52A3\u52BF\u5C31\u662F\u6D6A\u8D39\u7A7A\u95F4\u3002\u4E3E\u4F8B\u6765\u8BF4\u5427\uFF0CUTF-8 \u91C7\u7528\u4E86 3 \u4E2A\u5B57\u8282\uFF08256<em>256</em>256=16777216\uFF09\u6765\u7F16\u7801\u5E38\u7528\u7684\u6C49\u5B57\uFF0C\u4F46\u5E38\u7528\u7684\u6C49\u5B57\u6CA1\u6709\u8FD9\u4E48\u591A\uFF0C\u8FD9\u5BF9\u4E8E\u8BA1\u7B97\u673A\u6765\u8BF4\uFF0C\u5C31\u662F\u4E00\u79CD\u4E25\u91CD\u7684\u8D44\u6E90\u6D6A\u8D39\u3002</p><p>\u57FA\u4E8E\u8FD9\u6837\u7684\u8003\u8651\uFF0C\u4E2D\u56FD\u56FD\u5BB6\u6807\u51C6\u603B\u5C40\u4E8E 1980 \u5E74\u53D1\u5E03\u4E86 GB 2312 \u7F16\u7801\uFF0C\u5373\u4E2D\u534E\u4EBA\u6C11\u5171\u548C\u56FD\u56FD\u5BB6\u6807\u51C6\u7B80\u4F53\u4E2D\u6587\u5B57\u7B26\u96C6\u3002GB 2312 \u6807\u51C6\u5171\u6536\u5F55 6763 \u4E2A\u6C49\u5B57\uFF082 \u4E2A\u5B57\u8282\u5C31\u591F\u7528\u4E86\uFF09\uFF0C\u5176\u4E2D\u4E00\u7EA7\u6C49\u5B57 3755 \u4E2A\uFF0C\u4E8C\u7EA7\u6C49\u5B57 3008 \u4E2A\uFF1B\u540C\u65F6\u6536\u5F55\u4E86\u5305\u62EC\u62C9\u4E01\u5B57\u6BCD\u3001\u5E0C\u814A\u5B57\u6BCD\u3001\u65E5\u6587\u5E73\u5047\u540D\u53CA\u7247\u5047\u540D\u5B57\u6BCD\u3001\u4FC4\u8BED\u897F\u91CC\u5C14\u5B57\u6BCD\u5728\u5185\u7684 682 \u4E2A\u5B57\u7B26\u3002</p><p>GB 2312 \u7684\u51FA\u73B0\uFF0C\u57FA\u672C\u6EE1\u8DB3\u4E86\u6C49\u5B57\u7684\u8BA1\u7B97\u673A\u5904\u7406\u9700\u6C42\u3002\u5BF9\u4E8E\u4EBA\u540D\u3001\u53E4\u6C49\u8BED\u7B49\u65B9\u9762\u51FA\u73B0\u7684\u7F55\u7528\u5B57\u548C\u7E41\u4F53\u5B57\uFF0CGB 2312 \u4E0D\u80FD\u5904\u7406\uFF0C\u5C31\u6709\u4E86 GBK\uFF08K \u4E3A\u201C\u6269\u5C55\u201D\u7684\u6C49\u8BED\u62FC\u97F3\uFF08ku\xF2zh\u01CEn\uFF09\u7B2C\u4E00\u4E2A\u58F0\u6BCD\uFF09\u3002</p><p>\u6765\u770B\u4E00\u6BB5\u4EE3\u7801\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">Demo</span> <span class="token punctuation">{</span>
+import{_ as p}from"./plugin-vue_export-helper.21dcd24c.js";import{r as o,o as c,c as i,a as s,b as t,d as n,e}from"./app.615e41d8.js";const l={},r=s("h1",{id:"\u5F7B\u5E95\u5F04\u61C2java\u4E2D\u7684unicode\u548Cutf-8\u7F16\u7801",tabindex:"-1"},[s("a",{class:"header-anchor",href:"#\u5F7B\u5E95\u5F04\u61C2java\u4E2D\u7684unicode\u548Cutf-8\u7F16\u7801","aria-hidden":"true"},"#"),n(" \u5F7B\u5E95\u5F04\u61C2Java\u4E2D\u7684Unicode\u548CUTF-8\u7F16\u7801")],-1),u=n("\u201C\u4E8C\u54E5\uFF0C"),d={href:"https://mp.weixin.qq.com/s/twim3w_dp5ctCigjLGIbFw",target:"_blank",rel:"noopener noreferrer"},k=n("\u4E0A\u4E00\u7BC7"),m=n("\u6587\u7AE0\u4E2D\u63D0\u5230\u4E86 Unicode\uFF0C\u8BF4 Java \u4E2D\u7684 char \u7C7B\u578B\u4E4B\u6240\u4EE5\u5360 2 \u4E2A\u5B57\u8282\uFF0C\u662F\u56E0\u4E3A Java \u4F7F\u7528\u7684\u662F Unicode \u5B57\u7B26\u96C6\u800C\u4E0D\u662F ASCII \u5B57\u7B26\u96C6\uFF0C\u6211\u6709\u70B9\u8FF7\uFF0C\u60F3\u4E86\u89E3\u4E00\u4E0B\uFF0C\u80FD\u7EC6\u81F4\u7ED9\u6211\u8BF4\u8BF4\u5417\uFF1F\u201D"),x=e('<p>\u201C\u5F53\u7136\u6CA1\u95EE\u9898\u554A\uFF0C\u4E09\u59B9\u3002\u201D</p><p><strong>1\uFF09ASCII</strong></p><p>\u5BF9\u4E8E\u8BA1\u7B97\u673A\u6765\u8BF4\uFF0C\u53EA\u8BA4 0 \u548C 1\uFF0C\u6240\u6709\u7684\u4FE1\u606F\u6700\u7EC8\u90FD\u662F\u4E00\u4E2A\u4E8C\u8FDB\u5236\u6570\u3002\u4E00\u4E2A\u4E8C\u8FDB\u5236\u6570\u8981\u4E48\u662F 0\uFF0C\u8981\u4E48\u662F 1\uFF0C\u6240\u4EE5 8 \u4E2A\u4E8C\u8FDB\u5236\u6570\u653E\u5728\u4E00\u8D77\uFF08\u4E00\u4E2A\u5B57\u8282\uFF09\uFF0C\u5C31\u4F1A\u7EC4\u5408\u51FA 256 \u79CD\u72B6\u6001\uFF0C\u4E5F\u5C31\u662F 2 \u7684 8 \u6B21\u65B9\uFF08<code>2^8</code>\uFF09\uFF0C\u4ECE 00000000 \u5230 11111111\u3002</p><p>ASCII \u7801\u7531\u7535\u62A5\u7801\u53D1\u5C55\u800C\u6765\uFF0C\u7B2C\u4E00\u7248\u6807\u51C6\u53D1\u5E03\u4E8E 1963 \u5E74\uFF0C\u6700\u540E\u4E00\u6B21\u66F4\u65B0\u5219\u662F\u57281986 \u5E74\uFF0C\u81F3\u4ECA\u4E3A\u6B62\u5171\u5B9A\u4E49\u4E86 128 \u4E2A\u5B57\u7B26\u3002\u5176\u4E2D 33 \u4E2A\u5B57\u7B26\u65E0\u6CD5\u663E\u793A\u5728\u4E00\u822C\u7684\u8BBE\u5907\u4E0A\uFF0C\u9700\u8981\u7528\u7279\u6B8A\u7684\u8BBE\u5907\u624D\u80FD\u663E\u793A\u3002</p><p>ASCII \u7801\u7684\u5C40\u9650\u5728\u4E8E\u53EA\u80FD\u663E\u793A 26 \u4E2A\u57FA\u672C\u62C9\u4E01\u5B57\u6BCD\u3001\u963F\u62C9\u4F2F\u6570\u5B57\u548C\u82F1\u5F0F\u6807\u70B9\u7B26\u53F7\uFF0C\u56E0\u6B64\u53EA\u80FD\u7528\u4E8E\u663E\u793A\u73B0\u4EE3\u7F8E\u56FD\u82F1\u8BED\uFF0C\u5BF9\u4E8E\u5176\u4ED6\u4E00\u4E9B\u8BED\u8A00\u5219\u65E0\u80FD\u65E0\u529B\uFF0C\u6BD4\u5982\u5728\u6CD5\u8BED\u4E2D\uFF0C\u5B57\u6BCD\u4E0A\u65B9\u6709\u6CE8\u97F3\u7B26\u53F7\uFF0C\u5B83\u5C31\u65E0\u6CD5\u7528 ASCII \u7801\u8868\u793A\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/core-points/ten-01.png" alt=""></p><p>PS\uFF1A\u62C9\u4E01\u5B57\u6BCD\uFF08\u4E5F\u79F0\u4E3A\u7F57\u9A6C\u5B57\u6BCD\uFF09\u662F\u591A\u6570\u6B27\u6D32\u8BED\u8A00\u91C7\u7528\u7684\u5B57\u6BCD\u7CFB\u7EDF\uFF0C\u662F\u4E16\u754C\u4E0A\u6700\u901A\u884C\u7684\u5B57\u6BCD\u6587\u5B57\u7CFB\u7EDF\uFF0C\u662F\u7F57\u9A6C\u6587\u660E\u7684\u6210\u679C\u4E4B\u4E00\u3002</p><p>\u867D\u7136\u540D\u79F0\u4E0A\u53EB\u4F5C\u62C9\u4E01\u5B57\u6BCD\uFF0C\u4F46\u62C9\u4E01\u6587\u4E2D\u5E76\u6CA1\u6709\u7528 J\u3001U \u548C W \u8FD9\u4E09\u4E2A\u5B57\u6BCD\u3002</p><p>\u5728\u6211\u4EEC\u7684\u5370\u8C61\u4E2D\uFF0C\u53EF\u80FD\u8BF4\u62C9\u4E01\u5B57\u6BCD\u591A\u5C11\u6709\u4E9B\u964C\u751F\uFF0C\u8BF4\u82F1\u8BED\u5B57\u6BCD\u53EF\u80FD\u5C31\u6709\u76F4\u89C2\u7684\u5370\u8C61\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/core-points/ten-02.png" alt=""></p><p>PPS\uFF1A\u963F\u62C9\u4F2F\u6570\u5B57\uFF0C\u6211\u4EEC\u90FD\u5F88\u719F\u6089\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/core-points/ten-03.png" alt=""></p><p>\u4F46\u662F\uFF0C\u963F\u62C9\u4F2F\u6570\u5B57\u5E76\u975E\u8D77\u6E90\u4E8E\u963F\u62C9\u4F2F\uFF0C\u800C\u662F\u8D77\u6E90\u4E8E\u53E4\u5370\u5EA6\u3002\u5B66\u8FC7\u5386\u53F2\u7684\u6211\u4EEC\u5E94\u8BE5\u6709\u4E00\u4E9B\u5370\u8C61\uFF0C\u963F\u62C9\u4F2F\u5206\u5E03\u4E8E\u897F\u4E9A\u548C\u5317\u975E\uFF0C\u4EE5\u963F\u62C9\u4F2F\u8BED\u4E3A\u4E3B\u8981\u8BED\u8A00\uFF0C\u4EE5\u4F0A\u65AF\u5170\u6559\u4E3A\u4E3B\u8981\u4FE1\u4EF0\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/core-points/ten-04.png" alt=""></p><p>\u5904\u5728\u8FD9\u6837\u7684\u5730\u7406\u4F4D\u7F6E\uFF0C\u505A\u8D77\u4E1C\u4E9A\u548C\u6B27\u6D32\u7684\u4E00\u4E9B\u751F\u610F\u5C31\u5F88\u6709\u4F18\u52BF\uFF0C\u4E8E\u662F\u963F\u62C9\u4F2F\u6570\u5B57\u5C31\u7531\u963F\u62C9\u4F2F\u4EBA\u4F20\u5230\u4E86\u6B27\u6D32\uFF0C\u56E0\u6B64\u5F97\u540D\u3002</p><p>PPPS\uFF1A\u82F1\u5F0F\u6807\u70B9\u7B26\u53F7\uFF0C\u4E5F\u53EB\u82F1\u6587\u6807\u70B9\u7B26\u53F7\uFF0C\u548C\u4E2D\u6587\u6807\u70B9\u7B26\u53F7\u5F88\u76F8\u8FD1\u3002\u6807\u70B9\u7B26\u53F7\u662F\u8F85\u52A9\u6587\u5B57\u8BB0\u5F55\u8BED\u8A00\u7684\u7B26\u53F7\uFF0C\u662F\u4E66\u9762\u8BED\u7684\u7EC4\u6210\u90E8\u5206\uFF0C\u7528\u6765\u8868\u793A\u505C\u987F\u3001\u52A0\u5F3A\u8BED\u6C14\u7B49\u3002</p><p>\u82F1\u6587\u6807\u70B9\u7B26\u53F7\u5728 16 \u4E16\u7EAA\u65F6\uFF0C\u5206\u4E3A\u6717\u8BF5\u5B66\u6D3E\u548C\u53E5\u6CD5\u5B66\u6D3E\uFF0C\u4E3B\u8981\u7531\u53E4\u5178\u65F6\u671F\u7684\u5E0C\u814A\u6587\u548C\u62C9\u4E01\u6587\u6F14\u53D8\u800C\u6765\uFF0C\u5728 17 \u4E16\u7EAA\u540E\u8FDB\u5165\u7A33\u5B9A\u9636\u6BB5\u3002\u4FC4\u6587\u7684\u6807\u70B9\u7B26\u53F7\u4F9D\u636E\u5E0C\u814A\u6587\u800C\u6765\uFF0C\u5230\u4E86 18 \u4E16\u7EAA\u540E\u4E5F\u91C7\u7528\u4E86\u82F1\u6587\u6807\u70B9\u7B26\u53F7\u3002</p><p>\u5728\u5F88\u591A\u4EBA\u7684\u5370\u8C61\u4E2D\uFF0C\u53E4\u6587\u662F\u6CA1\u6709\u6807\u70B9\u7B26\u53F7\u7684\uFF0C\u4F46\u7BA1\u9521\u534E\u535A\u58EB\u7814\u7A76\u6307\u51FA\uFF0C\u4E2D\u56FD\u65E9\u5728\u5148\u79E6\u65F6\u4EE3\u5C31\u6709\u6807\u70B9\u7B26\u53F7\u4E86\uFF0C\u540E\u6765\u878D\u5408\u4E86\u4E00\u4E9B\u82F1\u6587\u6807\u70B9\u7B26\u53F7\u540E\uFF0C\u9010\u6E10\u5F62\u6210\u4E86\u73B0\u5728\u7684\u4E2D\u6587\u6807\u70B9\u7B26\u53F7\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/core-points/ten-05.png" alt=""></p><p><strong>2\uFF09Unicode</strong></p><p>\u8FD9\u4E2A\u4E16\u754C\u4E0A\uFF0C\u9664\u4E86\u82F1\u8BED\uFF0C\u8FD8\u6709\u6CD5\u8BED\u3001\u8461\u8404\u7259\u8BED\u3001\u897F\u73ED\u7259\u8BED\u3001\u5FB7\u8BED\u3001\u4FC4\u8BED\u3001\u963F\u62C9\u4F2F\u8BED\u3001\u97E9\u8BED\u3001\u65E5\u8BED\u7B49\u7B49\u7B49\u7B49\u3002ASCII \u7801\u7528\u6765\u8868\u793A\u82F1\u8BED\u662F\u7EF0\u7EF0\u6709\u4F59\u7684\uFF0C\u4F46\u5176\u4ED6\u8FD9\u4E9B\u8BED\u8A00\u5C31\u6CA1\u529E\u6CD5\u4E86\u3002</p><p>\u50CF\u6211\u4EEC\u7684\u6BCD\u8BED\uFF0C\u535A\u5927\u7CBE\u6DF1\uFF0C\u6C49\u5B57\u7684\u6570\u91CF\u5F88\u591A\u5F88\u591A\uFF0C\u4E1C\u6C49\u7684\u300A\u8BF4\u6587\u89E3\u5B57\u300B\u6536\u5B57 9353 \u4E2A\uFF0C\u6E05\u671D\u300A\u5EB7\u7199\u5B57\u5178\u300B\u6536\u5B57 47035 \u4E2A\uFF0C\u5F53\u4EE3\u7684\u300A\u6C49\u8BED\u5927\u5B57\u5178\u300B\u6536\u5B57 60370 \u4E2A\u30021994 \u5E74\u4E2D\u534E\u4E66\u5C40\u3001\u4E2D\u56FD\u53CB\u8C0A\u51FA\u7248\u516C\u53F8\u51FA\u7248\u7684\u300A\u4E2D\u534E\u5B57\u6D77\u300B\u6536\u5B57 85568 \u4E2A\u3002</p><p>PS\uFF1A\u5E38\u7528\u5B57\u5927\u6982 2500 \u4E2A\uFF0C\u6B21\u5E38\u7528\u5B57 1000 \u4E2A\u3002</p><p>\u4E00\u4E2A\u5B57\u8282\u53EA\u80FD\u8868\u793A 256 \u79CD\u7B26\u53F7\uFF0C\u6240\u4EE5\u5982\u679C\u62FF ASCII \u7801\u6765\u8868\u793A\u6C49\u5B57\u7684\u8BDD\uFF0C\u662F\u8FDC\u8FDC\u4E0D\u591F\u7528\u7684\uFF0C\u90A3\u5C31\u5FC5\u987B\u8981\u7528\u66F4\u591A\u7684\u5B57\u8282\u3002\u7B80\u4F53\u4E2D\u6587\u5E38\u89C1\u7684\u7F16\u7801\u65B9\u5F0F\u662F GB2312\uFF0C\u4F7F\u7528\u4E24\u4E2A\u5B57\u8282\u8868\u793A\u4E00\u4E2A\u6C49\u5B57\uFF0C\u7406\u8BBA\u4E0A\u6700\u591A\u53EF\u4EE5\u8868\u793A 256 x 256 = 65536 \u4E2A\u7B26\u53F7\u3002</p><p>\u8981\u77E5\u9053\uFF0C\u4E16\u754C\u4E0A\u5B58\u5728\u7740\u591A\u79CD\u7F16\u7801\u65B9\u5F0F\uFF0C\u540C\u4E00\u4E2A\u4E8C\u8FDB\u5236\u6570\u5B57\u53EF\u4EE5\u88AB\u89E3\u91CA\u6210\u4E0D\u540C\u7684\u7B26\u53F7\u3002\u56E0\u6B64\uFF0C\u8981\u60F3\u6253\u5F00\u4E00\u4E2A\u6587\u672C\u6587\u4EF6\uFF0C\u5C31\u5FC5\u987B\u77E5\u9053\u5B83\u7684\u7F16\u7801\u65B9\u5F0F\uFF0C\u5426\u5219\u7528\u9519\u8BEF\u7684\u7F16\u7801\u65B9\u5F0F\u89E3\u8BFB\uFF0C\u5C31\u4F1A\u51FA\u73B0\u4E71\u7801\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/core-points/ten-06.png" alt=""></p><p>PPS\uFF1A\u8FD9\u201C\u951F\u65A4\u62F7\u201D\u4EF7\u683C\u633A\u516C\u9053\u7684\u554A\uFF01\uFF01\uFF01\uFF08\u9003</p><p>\u5982\u679C\u6709\u4E00\u79CD\u7F16\u7801\uFF0C\u5C06\u4E16\u754C\u4E0A\u6240\u6709\u7684\u7B26\u53F7\u90FD\u7EB3\u5165\u5176\u4E2D\u3002\u6BCF\u4E00\u4E2A\u7B26\u53F7\u90FD\u7ED9\u4E88\u4E00\u4E2A\u72EC\u4E00\u65E0\u4E8C\u7684\u7F16\u7801\uFF0C\u90A3\u4E48\u4E71\u7801\u95EE\u9898\u5C31\u4F1A\u5F7B\u5E95\u6D88\u5931\u3002</p><p>\u8FD9\u4E2A\u8270\u5DE8\u7684\u4EFB\u52A1\u6709\u8C01\u6765\u5B8C\u6210\u5462\uFF1F<strong>Unicode</strong>\uFF0C\u4E2D\u6587\u8BD1\u4F5C\u4E07\u56FD\u7801\u3001\u56FD\u9645\u7801\u3001\u7EDF\u4E00\u7801\u3001\u5355\u4E00\u7801\uFF0C\u5C31\u50CF\u5B83\u7684\u540D\u5B57\u90FD\u8868\u793A\u7684\uFF0C\u8FD9\u662F\u4E00\u79CD\u6240\u6709\u7B26\u53F7\u7684\u7F16\u7801\u3002</p><p>Unicode \u81F3\u4ECA\u4ECD\u5728\u4E0D\u65AD\u589E\u4FEE\uFF0C\u6BCF\u4E2A\u65B0\u7248\u672C\u90FD\u4F1A\u52A0\u5165\u66F4\u591A\u65B0\u7684\u5B57\u7B26\u3002\u76EE\u524D\u6700\u65B0\u7684\u7248\u672C\u4E3A 2020 \u5E74 3 \u6708\u516C\u5E03\u7684 13.0\uFF0C\u6536\u5F55\u4E86 13 \u4E07\u4E2A\u5B57\u7B26\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/core-points/ten-07.png" alt=""></p><p>Unicode \u662F\u4E00\u4E2A\u5F88\u5927\u7684\u96C6\u5408\uFF0C\u73B0\u5728\u7684\u89C4\u6A21\u53EF\u4EE5\u5BB9\u7EB3 100 \u591A\u4E07\u4E2A\u7B26\u53F7\u3002\u6BCF\u4E2A\u7B26\u53F7\u7684\u7F16\u7801\u90FD\u4E0D\u4E00\u6837\uFF0C\u6BD4\u5982\uFF0C<code>U+0639</code>\u8868\u793A\u963F\u62C9\u4F2F\u5B57\u6BCD <code>Ain</code>\uFF0C<code>U+0041</code> \u8868\u793A\u82F1\u8BED\u7684\u5927\u5199\u5B57\u6BCD <code>A</code>\uFF0C<code>U+4E25</code> \u8868\u793A\u6C49\u5B57<code>\u4E25</code>\u3002</p>',32),b=n("\u5177\u4F53\u7684\u7B26\u53F7\u5BF9\u5E94\u8868\uFF0C\u53EF\u4EE5\u67E5\u8BE2 "),v={href:"http://www.unicode.org/",target:"_blank",rel:"noopener noreferrer"},g=n("unicode.org"),h=n("\uFF0C\u6216\u8005\u4E13\u95E8\u7684"),_={href:"http://www.chi2ko.com/tool/CJK.htm",target:"_blank",rel:"noopener noreferrer"},f=n("\u6C49\u5B57\u5BF9\u5E94\u8868"),U=n("\u3002"),F=e(`<p>\u66FE\u6709\u4EBA\u8FD9\u6837\u8BF4\uFF1A</p><blockquote><p>Unicode \u652F\u6301\u7684\u5B57\u7B26\u4E0A\u9650\u662F 65536 \u4E2A\uFF0CUnicode \u5B57\u7B26\u5FC5\u987B\u5360\u4E24\u4E2A\u5B57\u8282\u3002</p></blockquote><p>\u4F46\u8FD9\u662F\u4E00\u79CD\u8BEF\u89E3\uFF0C\u8BB0\u4F4F\uFF0CUnicode \u53EA\u662F\u4E00\u4E2A\u7528\u6765\u6620\u5C04\u5B57\u7B26\u548C\u6570\u5B57\u7684\u6807\u51C6\u3002\u5B83\u5BF9\u652F\u6301\u5B57\u7B26\u7684\u6570\u91CF\u6CA1\u6709\u9650\u5236\uFF0C\u4E5F\u4E0D\u8981\u6C42\u5B57\u7B26\u5FC5\u987B\u5360\u4E24\u4E2A\u3001\u4E09\u4E2A\u6216\u8005\u5176\u5B83\u4EFB\u610F\u6570\u91CF\u7684\u5B57\u8282\uFF0C\u6240\u4EE5\u5B83\u53EF\u4EE5\u65E0\u7A77\u5927\u3002</p><p>Unicode \u867D\u7136\u7EDF\u4E00\u4E86\u5168\u4E16\u754C\u5B57\u7B26\u7684\u7F16\u7801\uFF0C\u4F46\u6CA1\u6709\u89C4\u5B9A\u5982\u4F55\u5B58\u50A8\u3002\u5982\u679C\u7EDF\u4E00\u89C4\u5B9A\u7684\u8BDD\uFF0C\u6BCF\u4E2A\u7B26\u53F7\u5C31\u8981\u7528 3 \u4E2A\u6216 4 \u4E2A\u5B57\u8282\u8868\u793A\uFF0C\u56E0\u4E3A 2 \u4E2A\u5B57\u8282\u53EA\u80FD\u8868\u793A 65536 \u4E2A\uFF0C\u6839\u672C\u8868\u793A\u4E0D\u5168\u3002</p><p>\u90A3\u600E\u4E48\u529E\u5462\uFF1F</p><p>UTF\uFF08Unicode Transformation Formats\uFF0CUnicode \u7684\u7F16\u7801\u65B9\u5F0F\uFF09\u6765\u4E86\uFF01\u6700\u5E38\u89C1\u7684\u5C31\u662F UTF-8 \u548C UTF-16\u3002</p><p>\u5728 UTF-8 \u4E2D\uFF0C0-127 \u53F7\u7684\u5B57\u7B26\u7528 1 \u4E2A\u5B57\u8282\u6765\u8868\u793A\uFF0C\u4F7F\u7528\u548C ASCII \u76F8\u540C\u7684\u7F16\u7801\u3002\u53EA\u6709 128 \u53F7\u53CA\u4EE5\u4E0A\u7684\u5B57\u7B26\u624D\u7528 2 \u4E2A\u30013 \u4E2A\u6216\u8005 4 \u4E2A\u5B57\u8282\u6765\u8868\u793A\u3002</p><p>\u5982\u679C\u53EA\u6709\u4E00\u4E2A\u5B57\u8282\uFF0C\u90A3\u4E48\u6700\u9AD8\u7684\u6BD4\u7279\u4F4D\u4E3A 0\uFF1B\u5982\u679C\u6709\u591A\u4E2A\u5B57\u8282\uFF0C\u90A3\u4E48\u7B2C\u4E00\u4E2A\u5B57\u8282\u4ECE\u6700\u9AD8\u4F4D\u5F00\u59CB\uFF0C\u8FDE\u7EED\u6709\u51E0\u4E2A\u6BD4\u7279\u4F4D\u7684\u503C\u4E3A 1\uFF0C\u5C31\u4F7F\u7528\u51E0\u4E2A\u5B57\u8282\u7F16\u7801\uFF0C\u5269\u4E0B\u7684\u5B57\u8282\u5747\u4EE5 10 \u5F00\u5934\u3002</p><p>\u5177\u4F53\u7684\u8868\u73B0\u5F62\u5F0F\u4E3A\uFF1A</p><p>0xxxxxxx\uFF1A\u4E00\u4E2A\u5B57\u8282\uFF1B 110xxxxx 10xxxxxx\uFF1A\u4E24\u4E2A\u5B57\u8282\u7F16\u7801\u5F62\u5F0F\uFF08\u5F00\u59CB\u4E24\u4E2A 1\uFF09\uFF1B 1110xxxx 10xxxxxx 10xxxxxx\uFF1A\u4E09\u5B57\u8282\u7F16\u7801\u5F62\u5F0F\uFF08\u5F00\u59CB\u4E09\u4E2A 1\uFF09\uFF1B 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx\uFF1A\u56DB\u5B57\u8282\u7F16\u7801\u5F62\u5F0F\uFF08\u5F00\u59CB\u56DB\u4E2A 1\uFF09\u3002</p><p>\u4E5F\u5C31\u662F\u8BF4\uFF0CUTF-8 \u662F\u4E00\u79CD\u53EF\u53D8\u957F\u5EA6\u7684\u7F16\u7801\u65B9\u5F0F\u2014\u2014\u8FD9\u662F\u5B83\u7684\u4F18\u52BF\u4E5F\u662F\u52A3\u52BF\u3002</p><p>\u600E\u4E48\u8BB2\u5462\uFF1F\u4F18\u52BF\u5C31\u662F\u5B83\u5305\u7F57\u4E07\u8C61\uFF0C\u52A3\u52BF\u5C31\u662F\u6D6A\u8D39\u7A7A\u95F4\u3002\u4E3E\u4F8B\u6765\u8BF4\u5427\uFF0CUTF-8 \u91C7\u7528\u4E86 3 \u4E2A\u5B57\u8282\uFF08256<em>256</em>256=16777216\uFF09\u6765\u7F16\u7801\u5E38\u7528\u7684\u6C49\u5B57\uFF0C\u4F46\u5E38\u7528\u7684\u6C49\u5B57\u6CA1\u6709\u8FD9\u4E48\u591A\uFF0C\u8FD9\u5BF9\u4E8E\u8BA1\u7B97\u673A\u6765\u8BF4\uFF0C\u5C31\u662F\u4E00\u79CD\u4E25\u91CD\u7684\u8D44\u6E90\u6D6A\u8D39\u3002</p><p>\u57FA\u4E8E\u8FD9\u6837\u7684\u8003\u8651\uFF0C\u4E2D\u56FD\u56FD\u5BB6\u6807\u51C6\u603B\u5C40\u4E8E 1980 \u5E74\u53D1\u5E03\u4E86 GB 2312 \u7F16\u7801\uFF0C\u5373\u4E2D\u534E\u4EBA\u6C11\u5171\u548C\u56FD\u56FD\u5BB6\u6807\u51C6\u7B80\u4F53\u4E2D\u6587\u5B57\u7B26\u96C6\u3002GB 2312 \u6807\u51C6\u5171\u6536\u5F55 6763 \u4E2A\u6C49\u5B57\uFF082 \u4E2A\u5B57\u8282\u5C31\u591F\u7528\u4E86\uFF09\uFF0C\u5176\u4E2D\u4E00\u7EA7\u6C49\u5B57 3755 \u4E2A\uFF0C\u4E8C\u7EA7\u6C49\u5B57 3008 \u4E2A\uFF1B\u540C\u65F6\u6536\u5F55\u4E86\u5305\u62EC\u62C9\u4E01\u5B57\u6BCD\u3001\u5E0C\u814A\u5B57\u6BCD\u3001\u65E5\u6587\u5E73\u5047\u540D\u53CA\u7247\u5047\u540D\u5B57\u6BCD\u3001\u4FC4\u8BED\u897F\u91CC\u5C14\u5B57\u6BCD\u5728\u5185\u7684 682 \u4E2A\u5B57\u7B26\u3002</p><p>GB 2312 \u7684\u51FA\u73B0\uFF0C\u57FA\u672C\u6EE1\u8DB3\u4E86\u6C49\u5B57\u7684\u8BA1\u7B97\u673A\u5904\u7406\u9700\u6C42\u3002\u5BF9\u4E8E\u4EBA\u540D\u3001\u53E4\u6C49\u8BED\u7B49\u65B9\u9762\u51FA\u73B0\u7684\u7F55\u7528\u5B57\u548C\u7E41\u4F53\u5B57\uFF0CGB 2312 \u4E0D\u80FD\u5904\u7406\uFF0C\u5C31\u6709\u4E86 GBK\uFF08K 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     <span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">void</span> <span class="token function">main</span><span class="token punctuation">(</span><span class="token class-name">String</span><span class="token punctuation">[</span><span class="token punctuation">]</span> args<span class="token punctuation">)</span> <span class="token punctuation">{</span>
         <span class="token class-name">String</span> wanger <span class="token operator">=</span> <span class="token string">&quot;\u6C89\u9ED8\u738B\u4E8C&quot;</span><span class="token punctuation">;</span>
         <span class="token keyword">byte</span><span class="token punctuation">[</span><span class="token punctuation">]</span> bytes <span class="token operator">=</span> wanger<span class="token punctuation">.</span><span class="token function">getBytes</span><span class="token punctuation">(</span><span class="token class-name">Charset</span><span class="token punctuation">.</span><span class="token function">forName</span><span class="token punctuation">(</span><span class="token string">&quot;GBK&quot;</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
diff --git a/dist/assets/java.html.74ed2cc3.js b/dist/assets/java.html.74ed2cc3.js
deleted file mode 100644
index a8816078..00000000
--- a/dist/assets/java.html.74ed2cc3.js
+++ /dev/null
@@ -1 +0,0 @@
-import{_ as t}from"./plugin-vue_export-helper.21dcd24c.js";import{r,o as n,c as h,a,b as l,d as i,e as o}from"./app.a0271b9c.js";const d={},s=a("h1",{id:"java\u7A0B\u5E8F\u5458\u5E38\u8BFB\u4E66\u5355\u{1F4DA}-\u9644\u4E0B\u8F7D\u5730\u5740",tabindex:"-1"},[a("a",{class:"header-anchor",href:"#java\u7A0B\u5E8F\u5458\u5E38\u8BFB\u4E66\u5355\u{1F4DA}-\u9644\u4E0B\u8F7D\u5730\u5740","aria-hidden":"true"},"#"),i(" 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GitHub \u548C\u7801\u4E91\uFF1A",-1),_={href:"https://github.com/itwanger/JavaBooks",target:"_blank",rel:"noopener noreferrer"},g=i("GitHub\u5907\u7528\u5730\u5740"),f={href:"https://gitee.com/itwanger/JavaBooks",target:"_blank",rel:"noopener noreferrer"},x=i("Gitee\u5907\u7528\u5730\u5740"),m=o('<p>\u4E0A\u4F20\u5230 GitHub \u548C\u7801\u4E91\u4E0A\u8FD8\u6709\u4E00\u4E2A\u597D\u5904\uFF0C\u5C31\u662F\u65B9\u4FBF\u5927\u5BB6\u63D0\u9700\u6C42\uFF0C\u5982\u679C\u4E0A\u9762\u6CA1\u6709\u4F60\u60F3\u8981\u7684\u4E66\u7C4D\uFF0C\u53EF\u4EE5\u76F4\u63A5\u63D0 issue\uFF0C\u6211\u770B\u5230\u540E\u5C31\u4F1A\u7ACB\u9A6C\u53BB\u641C\u96C6\u548C\u6574\u7406\u3002</p><p>\u559C\u6B22\u7684\u8BDD\u53EF\u4EE5\u70B9\u4E2A star\u3002</p><p>\u8FD9\u662F\u6211\u770B\u8FC7\u7684\u4E00\u4E9B\u4E66\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/download/java-1.jpg" alt=""></p><p>\u90A3\u5176\u5B9E\u5F88\u591A\u4EBA\u5728\u5B66\u4E60\u7F16\u7A0B\u7684\u65F6\u5019\uFF0C\u5F88\u5BB9\u6613\u9677\u5165\u4E00\u4E2A\u8BEF\u533A\uFF0C\u5C31\u662F\u6CA1\u6709\u8BA1\u5212\u3001\u6CA1\u6709\u8DEF\u7EBF\uFF0C\u5C31\u5BFC\u81F4\u770B\u4F3C\u6295\u5165\u4E86\u5F88\u591A\u7CBE\u529B\uFF0C\u4F46\u6700\u540E\u7684\u5B66\u4E60\u6548\u679C\u5374\u6709\u70B9\u5BF9\u4E0D\u4F4F\u4ED8\u51FA\u7684\u65F6\u95F4\u548C\u7CBE\u529B\u3002</p><p>\u4E3A\u6B64\uFF0C\u6211\u82B1\u4E86\u5C06\u8FD1\u4E00\u4E2A\u6708\u7684\u65F6\u95F4\uFF0C\u6574\u7406\u4E86\u8FD9\u6837\u4E00\u6761\u5B66\u4E60\u8DEF\u7EBF\uFF0C\u5E76\u4E14\u628A\u6211\u8BFB\u8FC7\u7684\u7535\u5B50\u4E66\u5168\u90E8\u505A\u4E86\u5F52\u7C7B\uFF1A<strong>\u5165\u95E8\u2192\u5DE5\u5177\u2192\u6846\u67B6\u2192\u6570\u636E\u5E93\u2192\u5E76\u53D1\u7F16\u7A0B\u2192\u5E95\u5C42\u2192\u6027\u80FD\u4F18\u5316\u2192\u8BBE\u8BA1\u6A21\u5F0F\u2192\u64CD\u4F5C\u7CFB\u7EDF\u2192\u8BA1\u7B97\u673A\u7F51\u7EDC\u2192\u6570\u636E\u7ED3\u6784\u4E0E\u7B97\u6CD5\u2192\u9762\u8BD5\u2192\u67B6\u6784\u2192\u7BA1\u7406</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/download/java-2.jpg" alt=""></p><p>\u5C31\u8FDE\u9888\u690E\u5EB7\u590D\u6307\u5357\u90FD\u6709\u4E86\uFF0C\u8FD9\u6CE2\u826F\u5FC3\u5427\uFF1F\u5927\u5BB6\u53EF\u4EE5\u901A\u8FC7\u4E0B\u9762\u7684\u65B9\u5F0F\u83B7\u53D6\uFF0C\u6211\u60F3\u4E0D\u7BA1\u662F\u79D1\u73ED\u8FD8\u662F\u975E\u79D1\u73ED\u7684\uFF0C\u53EA\u8981\u4F60\u559C\u6B22\u8BA1\u7B97\u673A\u3001\u559C\u6B22\u7F16\u7A0B\uFF0C\u5E94\u8BE5\u90FD\u4F1A\u6709\u5F88\u5927\u7684\u5E2E\u52A9\u3002</p><p>\u9700\u8981\u7684\u5C0F\u4F19\u4F34\u8BF7\u626B\u63CF\u4E0B\u65B9\u7684\u4E8C\u7EF4\u7801\u5173\u6CE8\u4F5C\u8005\u7684\u539F\u521B\u516C\u4F17\u53F7\u300C<strong>\u6C89\u9ED8\u738B\u4E8C</strong>\u300D\u56DE\u590D\u5173\u952E\u5B57\u300C<strong>pdf</strong>\u300D\u5C31\u53EF\u4EE5\u62C9\u53D6\u5230\u4E0B\u8F7D\u94FE\u63A5\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongzhonghao.png" alt="\u626B\u7801\u5173\u6CE8\u540E\u56DE\u590D\u300Cpdf\u300D\u5173\u952E\u5B57"></p><h2 id="\u4E00\u3001\u7F16\u7A0B\u8BED\u8A00" tabindex="-1"><a class="header-anchor" href="#\u4E00\u3001\u7F16\u7A0B\u8BED\u8A00" aria-hidden="true">#</a> \u4E00\u3001\u7F16\u7A0B\u8BED\u8A00</h2><h3 id="c\u8BED\u8A00" tabindex="-1"><a class="header-anchor" href="#c\u8BED\u8A00" aria-hidden="true">#</a> C\u8BED\u8A00</h3><ul><li>\u300A\u962E\u4E00\u5CF0\u8001\u5E08\u7684 C\u8BED\u8A00\u5165\u95E8\u6559\u7A0B\u300B</li><li>\u300AC\u7A0B\u5E8F\u8BBE\u8BA1\u8BED\u8A00\u300B</li><li>\u300AC \u548C\u6307\u9488\u300B</li><li>\u300AC \u9677\u9631\u4E0E\u7F3A\u9677\u300B</li><li>\u300AC Primer Plus\u300B</li></ul><h3 id="java-\u8BED\u8A00" tabindex="-1"><a class="header-anchor" href="#java-\u8BED\u8A00" aria-hidden="true">#</a> Java \u8BED\u8A00</h3><ul><li>\u300A\u4E8C\u54E5\u7684 Java \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF\u300B\uFF0CGitHub \u4E0A\u5DF2\u7ECF\u5F00\u6E90\uFF0C\u6301\u7EED\u66F4\u65B0</li><li>\u300AJava \u7F16\u7A0B\u601D\u60F3\u300B</li><li>\u300A\u6DF1\u5165\u6D45\u51FA Java \u591A\u7EBF\u7A0B\u300B</li><li>\u300A\u6DF1\u5165\u7406\u89E3 Java \u865A\u62DF\u673A\u300B</li></ul><p>\u5B66\u4E60\u4EFB\u4F55\u4E00\u95E8\u7F16\u7A0B\u8BED\u8A00\uFF0C\u4E00\u5B9A\u4E0D\u8981\u6D45\u5C1D\u8F84\u6B62\uFF0C\u56E0\u4E3A\u5165\u95E8\u90FD\u5F88\u5BB9\u6613\uFF0C\u8FDB\u9636\u5374\u5F88\u96BE\u3002\u5982\u679C\u53EA\u662F\u873B\u8713\u70B9\u6C34\uFF0C\u5230\u6700\u540E\u53EF\u80FD\u5C31\u662F\u7AF9\u7BEE\u6253\u6C34\u4E00\u573A\u7A7A\uFF0C\u7CBE\u534E\u7684\u6C38\u8FDC\u4E5F\u5B66\u4E0D\u5230\u3002</p><p>\u521D\u5B66\u9636\u6BB5\uFF0C\u4E00\u5B9A\u8981\u591A coding\uFF0Ccoding\uFF0Ccoding\uFF0C\u5343\u4E07\u4E0D\u8981\u773C\u9AD8\u624B\u4F4E\u3002\u5E0C\u671B\u6211\u7684\u8FD9\u4EFD\u8BA1\u7B97\u673A\u4E66\u5355\u80FD\u5E2E\u52A9\u5230\u5927\u5BB6\u3002</p><h3 id="c-\u8BED\u8A00" tabindex="-1"><a class="header-anchor" href="#c-\u8BED\u8A00" aria-hidden="true">#</a> C++ \u8BED\u8A00</h3><ul><li>\u300AC++ primer\u300B</li><li>\u300AEffective C++\u300B</li><li>\u300ASTL\u6E90\u7801\u89E3\u6790\u300B</li></ul><h3 id="python-\u8BED\u8A00" tabindex="-1"><a class="header-anchor" href="#python-\u8BED\u8A00" aria-hidden="true">#</a> Python \u8BED\u8A00</h3><ul><li>\u300A\u6D41\u7545\u7684 Python\u300B</li><li>\u300APython\u7F16\u7A0B\uFF1A\u4ECE\u5165\u95E8\u5230\u5B9E\u8DF5\u300B</li><li>\u300A\u96F6\u57FA\u7840\u5B66 Python\u300B</li><li>\u300A\u7528Python\u8FDB\u884C\u81EA\u7136\u8BED\u8A00\u5904\u7406\u300B</li></ul><h3 id="javascript-\u8BED\u8A00" tabindex="-1"><a class="header-anchor" href="#javascript-\u8BED\u8A00" aria-hidden="true">#</a> JavaScript \u8BED\u8A00</h3><ul><li>\u300AJavaScript \u738B\u8005\u5F52\u6765\u300B</li><li>\u300A\u4F60\u4E0D\u77E5\u9053\u7684 JavaScript\u300B</li><li>\u300AJavaScript \u9AD8\u7EA7\u7A0B\u5E8F\u8BBE\u8BA1\u300B</li></ul><h2 id="\u4E8C\u3001\u6570\u636E\u7ED3\u6784\u4E0E\u7B97\u6CD5" tabindex="-1"><a class="header-anchor" href="#\u4E8C\u3001\u6570\u636E\u7ED3\u6784\u4E0E\u7B97\u6CD5" aria-hidden="true">#</a> \u4E8C\u3001\u6570\u636E\u7ED3\u6784\u4E0E\u7B97\u6CD5</h2><ul><li>\u300A\u7B97\u6CD5\u5BFC\u8BBA\u300B</li><li>\u300A\u7B97\u6CD5 4\u300B</li><li>\u300A\u7F16\u7A0B\u73E0\u7391\u300B</li><li>\u300A\u7F16\u7A0B\u4E4B\u7F8E\u300B</li><li>\u300A\u8DA3\u5B66\u6570\u636E\u7ED3\u6784\u300B</li></ul><h2 id="\u4E09\u3001\u8BA1\u7B97\u673A\u57FA\u7840" tabindex="-1"><a class="header-anchor" href="#\u4E09\u3001\u8BA1\u7B97\u673A\u57FA\u7840" aria-hidden="true">#</a> \u4E09\u3001\u8BA1\u7B97\u673A\u57FA\u7840</h2><h3 id="\u64CD\u4F5C\u7CFB\u7EDF" tabindex="-1"><a class="header-anchor" href="#\u64CD\u4F5C\u7CFB\u7EDF" aria-hidden="true">#</a> \u64CD\u4F5C\u7CFB\u7EDF</h3><ul><li>\u300A\u73B0\u4EE3\u64CD\u4F5C\u7CFB\u7EDF\u300B</li><li>\u300A\u9E1F\u54E5\u7684 Linux \u79C1\u623F\u83DC\u300B</li></ul><h3 id="\u8BA1\u7B97\u673A\u7EC4\u6210\u539F\u7406" tabindex="-1"><a class="header-anchor" href="#\u8BA1\u7B97\u673A\u7EC4\u6210\u539F\u7406" aria-hidden="true">#</a> \u8BA1\u7B97\u673A\u7EC4\u6210\u539F\u7406</h3><ul><li>\u300A\u7A0B\u5E8F\u662F\u5982\u4F55\u8DD1\u8D77\u6765\u7684\u300B</li><li>\u300A\u8BA1\u7B97\u673A\u662F\u5982\u4F55\u8DD1\u8D77\u6765\u7684\u300B</li><li>\u300A\u7F16\u7801\uFF1A\u9690\u533F\u5728\u8BA1\u7B97\u673A\u8F6F\u786C\u4EF6\u80CC\u540E\u7684\u8BED\u8A00\u300B</li></ul><h3 id="\u8BA1\u7B97\u673A\u7F51\u7EDC" tabindex="-1"><a class="header-anchor" href="#\u8BA1\u7B97\u673A\u7F51\u7EDC" aria-hidden="true">#</a> \u8BA1\u7B97\u673A\u7F51\u7EDC</h3><ul><li>\u300A\u56FE\u89E3 HTTP\u300B</li><li>\u300A\u56FE\u89E3 TCP/IP\u300B</li><li>\u300A\u8BA1\u7B97\u673A\u7F51\u7EDC\u81EA\u9876\u5411\u4E0B\u300B</li><li>\u300A\u7F51\u7EDC\u662F\u600E\u6837\u8FDE\u63A5\u7684\u300B</li></ul><h3 id="\u6570\u636E\u5E93" tabindex="-1"><a class="header-anchor" href="#\u6570\u636E\u5E93" aria-hidden="true">#</a> \u6570\u636E\u5E93</h3><ul><li>\u300ASQL\u5FC5\u77E5\u5FC5\u4F1A\u300B</li><li>\u300A\u9AD8\u6027\u80FD MySQL\u300B</li><li>\u300AMySQL\u6280\u672F\u5185\u5E55 InnoDB\u5B58\u50A8\u5F15\u64CE\u300B</li><li>\u300ARedis \u6DF1\u5EA6\u5386\u9669\uFF1A\u6838\u5FC3\u539F\u7406\u4E0E\u5E94\u7528\u5B9E\u8DF5\u300B</li></ul><h3 id="\u56DB\u3001\u7F16\u7A0B\u5B9E\u6218" tabindex="-1"><a class="header-anchor" href="#\u56DB\u3001\u7F16\u7A0B\u5B9E\u6218" aria-hidden="true">#</a> \u56DB\u3001\u7F16\u7A0B\u5B9E\u6218</h3><ul><li>\u300A\u4EE3\u7801\u6574\u6D01\u4E4B\u9053\u300B</li><li>\u300A\u963F\u91CC\u5DF4\u5DF4 Java \u5F00\u53D1\u624B\u518C\u300B</li><li>\u300A\u91CD\u6784\uFF1A\u6539\u5584\u65E2\u6709\u4EE3\u7801\u7684\u8BBE\u8BA1\u300B</li><li>\u300AEffective Java\u300B</li></ul><h3 id="\u4E94\u3001\u4EE3\u7801\u4EBA\u751F" tabindex="-1"><a class="header-anchor" href="#\u4E94\u3001\u4EE3\u7801\u4EBA\u751F" aria-hidden="true">#</a> \u4E94\u3001\u4EE3\u7801\u4EBA\u751F</h3><ul><li>\u300A\u9ED1\u5BA2\u4E0E\u753B\u5BB6\u300B</li><li>\u300A\u4EBA\u6708\u795E\u8BDD\u300B</li><li>\u300A\u4EBA\u4EF6\u300B</li><li>\u300A\u4EE3\u7801\u5927\u5168\u300B</li><li>\u300A\u6570\u5B66\u4E4B\u7F8E\u300B</li><li>\u300A\u56FE\u7075\u7684\u79D8\u5BC6\u300B</li></ul><p>\u3002\u3002\u3002\u3002\u6301\u7EED\u66F4\u65B0</p><p>\u5F53\u7136\u4E86\uFF0C\u6211\u4E2A\u4EBA\u662F\u6709\u5C40\u9650\u6027\u7684\uFF0C\u5982\u679C\u5927\u5BB6\u6709\u4EC0\u4E48\u597D\u4E66\u4E5F\u53EF\u4EE5\u63A8\u8350\u7ED9\u6211\uFF0C\u6211\u66F4\u65B0\u4E0A\u6765\uFF0C\u4E5F\u4E3A\u540E\u6765\u8005\u63D0\u4F9B\u4E00\u4E2A\u66F4\u4F53\u7CFB\u5316\u7684\u4E66\u5355\u3002</p><p>\u8BB2\u771F\u5FC3\u8BDD\uFF0C\u968F\u7740\u65F6\u95F4\u7684\u63A8\u79FB\uFF0C\u6211\u5BF9\u6574\u4E2A\u8BA1\u7B97\u673A\u4F53\u7CFB\u7684\u8BA4\u77E5\u4E5F\u66F4\u52A0\u5168\u9762\u548C\u6DF1\u523B\u4E86\uFF0C\u90A3\u8FD9\u4EFD\u4E66\u5355\u771F\u7684\u5E0C\u671B\u80FD\u5E2E\u52A9\u5230\u5927\u5BB6\u3002</p><p>\u9700\u8981\u7684\u5C0F\u4F19\u4F34\u8BF7\u626B\u63CF\u4E0B\u65B9\u7684\u4E8C\u7EF4\u7801\u5173\u6CE8\u4F5C\u8005\u7684\u539F\u521B\u516C\u4F17\u53F7\u300C<strong>\u6C89\u9ED8\u738B\u4E8C</strong>\u300D\u56DE\u590D\u5173\u952E\u5B57\u300C<strong>pdf</strong>\u300D\u5C31\u53EF\u4EE5\u62C9\u53D6\u5230\u4E0B\u8F7D\u94FE\u63A5\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongzhonghao.png" alt="\u626B\u7801\u5173\u6CE8\u540E\u56DE\u590D\u300Cpdf\u300D\u5173\u952E\u5B57"></p><p>\u51E0\u5E74\u540E\uFF0C\u4F60\u5C06\u662F\u4E00\u540D\u5584\u4E8E\u89E3\u51B3\u5B9E\u9645\u95EE\u9898\u7684\u5DE5\u7A0B\u5E08\uFF0C\u800C\u4E0D\u662F\u4E00\u540D\u666E\u666E\u901A\u901A\u7684\u7801\u519C\u3002</p><blockquote><p>\u6BCB\u5EB8\u7F6E\u7591\uFF0C\u8FD9\u662F\u4E00\u6761\u574E\u5777\u7684\u8DEF\uFF0C\u4F46\u5B66\u5F1F\u5B66\u59B9\u4EEC\u5C31\u662F\u6765\u62AB\u8346\u65A9\u68D8\u7684\uFF0C\u5BF9\u5427\uFF1F</p></blockquote>',45);function j(J,C){const e=r("ExternalLinkIcon");return n(),h("div",null,[s,c,p,u,b,v,a("ul",null,[a("li",null,[a("a",_,[g,l(e)])]),a("li",null,[a("a",f,[x,l(e)])])]),m])}var y=t(d,[["render",j],["__file","java.html.vue"]]);export{y as default};
diff --git a/dist/assets/java.html.8cfce3ac.js b/dist/assets/java.html.8cfce3ac.js
new file mode 100644
index 00000000..74e369d4
--- /dev/null
+++ b/dist/assets/java.html.8cfce3ac.js
@@ -0,0 +1 @@
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diff --git a/dist/assets/java.html.9104a10d.js b/dist/assets/java.html.9104a10d.js
new file mode 100644
index 00000000..f9a88684
--- /dev/null
+++ b/dist/assets/java.html.9104a10d.js
@@ -0,0 +1 @@
+import{_ as t}from"./plugin-vue_export-helper.21dcd24c.js";import{r,o as n,c as h,a,b as e,d as l,e as o}from"./app.615e41d8.js";const d={},s=a("p",null,"\u4F1F\u5927\u7684\u9AD8\u5C14\u57FA\u66FE\u8BF4\u8FC7\uFF1A\u201C\u4E66\u7C4D\u662F\u4EBA\u7C7B\u8FDB\u6B65\u7684\u9636\u68AF\u201D\uFF0C\u8BFB\u7ECF\u5178\u7684\u4E66\u5C31\u597D\u50CF\u662F\u7AD9\u5728\u5DE8\u4EBA\u7684\u80A9\u8180\u4E0A\uFF0C\u89C6\u91CE\u66F4\u5F00\u9614\uFF0C\u601D\u8003\u95EE\u9898\u7684\u65B9\u5F0F\u4E5F\u4F1A\u66F4\u5168\u9762\u3002",-1),c=a("p",null,"\u8BB2\u771F\uFF0C\u633A\u9057\u61BE\u7684\uFF0C\u5927\u5B66\u671F\u95F4\uFF0C\u6211\u8BFB\u4E86\u4E0D\u5C11\u5783\u573E\u4E66\uFF0C\u6BD4\u5982\u8BF4\u300A21 \u5929\u5B66\u4F1A xxx\u300B\uFF0C\u300A3 \u5929\u6559\u4F60\u5B66\u4F1A xxx\u300B\u3002",-1),p=a("p",null,"\u76F4\u5230\u5DE5\u4F5C\u540E\u7684\u7B2C\u4E8C\u5E74\uFF0C\u9047\u5230\u4E86\u4E00\u4E2A\u975E\u5E38 nice 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GitHub \u548C\u7801\u4E91\uFF1A",-1),g={href:"https://github.com/itwanger/JavaBooks",target:"_blank",rel:"noopener noreferrer"},_=l("GitHub\u5907\u7528\u5730\u5740"),v={href:"https://gitee.com/itwanger/JavaBooks",target:"_blank",rel:"noopener noreferrer"},f=l("Gitee\u5907\u7528\u5730\u5740"),x=o('<p>\u4E0A\u4F20\u5230 GitHub \u548C\u7801\u4E91\u4E0A\u8FD8\u6709\u4E00\u4E2A\u597D\u5904\uFF0C\u5C31\u662F\u65B9\u4FBF\u5927\u5BB6\u63D0\u9700\u6C42\uFF0C\u5982\u679C\u4E0A\u9762\u6CA1\u6709\u4F60\u60F3\u8981\u7684\u4E66\u7C4D\uFF0C\u53EF\u4EE5\u76F4\u63A5\u63D0 issue\uFF0C\u6211\u770B\u5230\u540E\u5C31\u4F1A\u7ACB\u9A6C\u53BB\u641C\u96C6\u548C\u6574\u7406\u3002</p><p>\u559C\u6B22\u7684\u8BDD\u53EF\u4EE5\u70B9\u4E2A star\u3002</p><p>\u8FD9\u662F\u6211\u770B\u8FC7\u7684\u4E00\u4E9B\u4E66\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/download/java-1.jpg" alt=""></p><p>\u90A3\u5176\u5B9E\u5F88\u591A\u4EBA\u5728\u5B66\u4E60\u7F16\u7A0B\u7684\u65F6\u5019\uFF0C\u5F88\u5BB9\u6613\u9677\u5165\u4E00\u4E2A\u8BEF\u533A\uFF0C\u5C31\u662F\u6CA1\u6709\u8BA1\u5212\u3001\u6CA1\u6709\u8DEF\u7EBF\uFF0C\u5C31\u5BFC\u81F4\u770B\u4F3C\u6295\u5165\u4E86\u5F88\u591A\u7CBE\u529B\uFF0C\u4F46\u6700\u540E\u7684\u5B66\u4E60\u6548\u679C\u5374\u6709\u70B9\u5BF9\u4E0D\u4F4F\u4ED8\u51FA\u7684\u65F6\u95F4\u548C\u7CBE\u529B\u3002</p><p>\u4E3A\u6B64\uFF0C\u6211\u82B1\u4E86\u5C06\u8FD1\u4E00\u4E2A\u6708\u7684\u65F6\u95F4\uFF0C\u6574\u7406\u4E86\u8FD9\u6837\u4E00\u6761\u5B66\u4E60\u8DEF\u7EBF\uFF0C\u5E76\u4E14\u628A\u6211\u8BFB\u8FC7\u7684\u7535\u5B50\u4E66\u5168\u90E8\u505A\u4E86\u5F52\u7C7B\uFF1A<strong>\u5165\u95E8\u2192\u5DE5\u5177\u2192\u6846\u67B6\u2192\u6570\u636E\u5E93\u2192\u5E76\u53D1\u7F16\u7A0B\u2192\u5E95\u5C42\u2192\u6027\u80FD\u4F18\u5316\u2192\u8BBE\u8BA1\u6A21\u5F0F\u2192\u64CD\u4F5C\u7CFB\u7EDF\u2192\u8BA1\u7B97\u673A\u7F51\u7EDC\u2192\u6570\u636E\u7ED3\u6784\u4E0E\u7B97\u6CD5\u2192\u9762\u8BD5\u2192\u67B6\u6784\u2192\u7BA1\u7406</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/download/java-2.jpg" alt=""></p><p>\u5C31\u8FDE\u9888\u690E\u5EB7\u590D\u6307\u5357\u90FD\u6709\u4E86\uFF0C\u8FD9\u6CE2\u826F\u5FC3\u5427\uFF1F\u5927\u5BB6\u53EF\u4EE5\u901A\u8FC7\u4E0B\u9762\u7684\u65B9\u5F0F\u83B7\u53D6\uFF0C\u6211\u60F3\u4E0D\u7BA1\u662F\u79D1\u73ED\u8FD8\u662F\u975E\u79D1\u73ED\u7684\uFF0C\u53EA\u8981\u4F60\u559C\u6B22\u8BA1\u7B97\u673A\u3001\u559C\u6B22\u7F16\u7A0B\uFF0C\u5E94\u8BE5\u90FD\u4F1A\u6709\u5F88\u5927\u7684\u5E2E\u52A9\u3002</p><p>\u9700\u8981\u7684\u5C0F\u4F19\u4F34\u8BF7\u626B\u63CF\u4E0B\u65B9\u7684\u4E8C\u7EF4\u7801\u5173\u6CE8\u4F5C\u8005\u7684\u539F\u521B\u516C\u4F17\u53F7\u300C<strong>\u6C89\u9ED8\u738B\u4E8C</strong>\u300D\u56DE\u590D\u5173\u952E\u5B57\u300C<strong>pdf</strong>\u300D\u5C31\u53EF\u4EE5\u62C9\u53D6\u5230\u4E0B\u8F7D\u94FE\u63A5\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongzhonghao.png" alt="\u626B\u7801\u5173\u6CE8\u540E\u56DE\u590D\u300Cpdf\u300D\u5173\u952E\u5B57"></p><h2 id="\u4E00\u3001\u7F16\u7A0B\u8BED\u8A00" tabindex="-1"><a class="header-anchor" href="#\u4E00\u3001\u7F16\u7A0B\u8BED\u8A00" aria-hidden="true">#</a> \u4E00\u3001\u7F16\u7A0B\u8BED\u8A00</h2><h3 id="c\u8BED\u8A00" tabindex="-1"><a class="header-anchor" href="#c\u8BED\u8A00" aria-hidden="true">#</a> C\u8BED\u8A00</h3><ul><li>\u300A\u962E\u4E00\u5CF0\u8001\u5E08\u7684 C\u8BED\u8A00\u5165\u95E8\u6559\u7A0B\u300B</li><li>\u300AC\u7A0B\u5E8F\u8BBE\u8BA1\u8BED\u8A00\u300B</li><li>\u300AC \u548C\u6307\u9488\u300B</li><li>\u300AC \u9677\u9631\u4E0E\u7F3A\u9677\u300B</li><li>\u300AC Primer Plus\u300B</li></ul><h3 id="java-\u8BED\u8A00" tabindex="-1"><a class="header-anchor" href="#java-\u8BED\u8A00" aria-hidden="true">#</a> Java \u8BED\u8A00</h3><ul><li>\u300A\u4E8C\u54E5\u7684 Java \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF\u300B\uFF0CGitHub \u4E0A\u5DF2\u7ECF\u5F00\u6E90\uFF0C\u6301\u7EED\u66F4\u65B0</li><li>\u300AJava \u7F16\u7A0B\u601D\u60F3\u300B</li><li>\u300A\u6DF1\u5165\u6D45\u51FA Java \u591A\u7EBF\u7A0B\u300B</li><li>\u300A\u6DF1\u5165\u7406\u89E3 Java \u865A\u62DF\u673A\u300B</li></ul><p>\u5B66\u4E60\u4EFB\u4F55\u4E00\u95E8\u7F16\u7A0B\u8BED\u8A00\uFF0C\u4E00\u5B9A\u4E0D\u8981\u6D45\u5C1D\u8F84\u6B62\uFF0C\u56E0\u4E3A\u5165\u95E8\u90FD\u5F88\u5BB9\u6613\uFF0C\u8FDB\u9636\u5374\u5F88\u96BE\u3002\u5982\u679C\u53EA\u662F\u873B\u8713\u70B9\u6C34\uFF0C\u5230\u6700\u540E\u53EF\u80FD\u5C31\u662F\u7AF9\u7BEE\u6253\u6C34\u4E00\u573A\u7A7A\uFF0C\u7CBE\u534E\u7684\u6C38\u8FDC\u4E5F\u5B66\u4E0D\u5230\u3002</p><p>\u521D\u5B66\u9636\u6BB5\uFF0C\u4E00\u5B9A\u8981\u591A coding\uFF0Ccoding\uFF0Ccoding\uFF0C\u5343\u4E07\u4E0D\u8981\u773C\u9AD8\u624B\u4F4E\u3002\u5E0C\u671B\u6211\u7684\u8FD9\u4EFD\u8BA1\u7B97\u673A\u4E66\u5355\u80FD\u5E2E\u52A9\u5230\u5927\u5BB6\u3002</p><h3 id="c-\u8BED\u8A00" tabindex="-1"><a class="header-anchor" href="#c-\u8BED\u8A00" aria-hidden="true">#</a> C++ \u8BED\u8A00</h3><ul><li>\u300AC++ primer\u300B</li><li>\u300AEffective C++\u300B</li><li>\u300ASTL\u6E90\u7801\u89E3\u6790\u300B</li></ul><h3 id="python-\u8BED\u8A00" tabindex="-1"><a class="header-anchor" href="#python-\u8BED\u8A00" aria-hidden="true">#</a> Python \u8BED\u8A00</h3><ul><li>\u300A\u6D41\u7545\u7684 Python\u300B</li><li>\u300APython\u7F16\u7A0B\uFF1A\u4ECE\u5165\u95E8\u5230\u5B9E\u8DF5\u300B</li><li>\u300A\u96F6\u57FA\u7840\u5B66 Python\u300B</li><li>\u300A\u7528Python\u8FDB\u884C\u81EA\u7136\u8BED\u8A00\u5904\u7406\u300B</li></ul><h3 id="javascript-\u8BED\u8A00" tabindex="-1"><a class="header-anchor" href="#javascript-\u8BED\u8A00" aria-hidden="true">#</a> JavaScript \u8BED\u8A00</h3><ul><li>\u300AJavaScript \u738B\u8005\u5F52\u6765\u300B</li><li>\u300A\u4F60\u4E0D\u77E5\u9053\u7684 JavaScript\u300B</li><li>\u300AJavaScript \u9AD8\u7EA7\u7A0B\u5E8F\u8BBE\u8BA1\u300B</li></ul><h2 id="\u4E8C\u3001\u6570\u636E\u7ED3\u6784\u4E0E\u7B97\u6CD5" tabindex="-1"><a class="header-anchor" href="#\u4E8C\u3001\u6570\u636E\u7ED3\u6784\u4E0E\u7B97\u6CD5" aria-hidden="true">#</a> \u4E8C\u3001\u6570\u636E\u7ED3\u6784\u4E0E\u7B97\u6CD5</h2><ul><li>\u300A\u7B97\u6CD5\u5BFC\u8BBA\u300B</li><li>\u300A\u7B97\u6CD5 4\u300B</li><li>\u300A\u7F16\u7A0B\u73E0\u7391\u300B</li><li>\u300A\u7F16\u7A0B\u4E4B\u7F8E\u300B</li><li>\u300A\u8DA3\u5B66\u6570\u636E\u7ED3\u6784\u300B</li></ul><h2 id="\u4E09\u3001\u8BA1\u7B97\u673A\u57FA\u7840" tabindex="-1"><a class="header-anchor" href="#\u4E09\u3001\u8BA1\u7B97\u673A\u57FA\u7840" aria-hidden="true">#</a> \u4E09\u3001\u8BA1\u7B97\u673A\u57FA\u7840</h2><h3 id="\u64CD\u4F5C\u7CFB\u7EDF" tabindex="-1"><a class="header-anchor" href="#\u64CD\u4F5C\u7CFB\u7EDF" aria-hidden="true">#</a> \u64CD\u4F5C\u7CFB\u7EDF</h3><ul><li>\u300A\u73B0\u4EE3\u64CD\u4F5C\u7CFB\u7EDF\u300B</li><li>\u300A\u9E1F\u54E5\u7684 Linux \u79C1\u623F\u83DC\u300B</li></ul><h3 id="\u8BA1\u7B97\u673A\u7EC4\u6210\u539F\u7406" tabindex="-1"><a class="header-anchor" href="#\u8BA1\u7B97\u673A\u7EC4\u6210\u539F\u7406" aria-hidden="true">#</a> \u8BA1\u7B97\u673A\u7EC4\u6210\u539F\u7406</h3><ul><li>\u300A\u7A0B\u5E8F\u662F\u5982\u4F55\u8DD1\u8D77\u6765\u7684\u300B</li><li>\u300A\u8BA1\u7B97\u673A\u662F\u5982\u4F55\u8DD1\u8D77\u6765\u7684\u300B</li><li>\u300A\u7F16\u7801\uFF1A\u9690\u533F\u5728\u8BA1\u7B97\u673A\u8F6F\u786C\u4EF6\u80CC\u540E\u7684\u8BED\u8A00\u300B</li></ul><h3 id="\u8BA1\u7B97\u673A\u7F51\u7EDC" tabindex="-1"><a class="header-anchor" href="#\u8BA1\u7B97\u673A\u7F51\u7EDC" aria-hidden="true">#</a> \u8BA1\u7B97\u673A\u7F51\u7EDC</h3><ul><li>\u300A\u56FE\u89E3 HTTP\u300B</li><li>\u300A\u56FE\u89E3 TCP/IP\u300B</li><li>\u300A\u8BA1\u7B97\u673A\u7F51\u7EDC\u81EA\u9876\u5411\u4E0B\u300B</li><li>\u300A\u7F51\u7EDC\u662F\u600E\u6837\u8FDE\u63A5\u7684\u300B</li></ul><h3 id="\u6570\u636E\u5E93" tabindex="-1"><a class="header-anchor" href="#\u6570\u636E\u5E93" aria-hidden="true">#</a> \u6570\u636E\u5E93</h3><ul><li>\u300ASQL\u5FC5\u77E5\u5FC5\u4F1A\u300B</li><li>\u300A\u9AD8\u6027\u80FD MySQL\u300B</li><li>\u300AMySQL\u6280\u672F\u5185\u5E55 InnoDB\u5B58\u50A8\u5F15\u64CE\u300B</li><li>\u300ARedis \u6DF1\u5EA6\u5386\u9669\uFF1A\u6838\u5FC3\u539F\u7406\u4E0E\u5E94\u7528\u5B9E\u8DF5\u300B</li></ul><h3 id="\u56DB\u3001\u7F16\u7A0B\u5B9E\u6218" tabindex="-1"><a class="header-anchor" href="#\u56DB\u3001\u7F16\u7A0B\u5B9E\u6218" aria-hidden="true">#</a> \u56DB\u3001\u7F16\u7A0B\u5B9E\u6218</h3><ul><li>\u300A\u4EE3\u7801\u6574\u6D01\u4E4B\u9053\u300B</li><li>\u300A\u963F\u91CC\u5DF4\u5DF4 Java \u5F00\u53D1\u624B\u518C\u300B</li><li>\u300A\u91CD\u6784\uFF1A\u6539\u5584\u65E2\u6709\u4EE3\u7801\u7684\u8BBE\u8BA1\u300B</li><li>\u300AEffective Java\u300B</li></ul><h3 id="\u4E94\u3001\u4EE3\u7801\u4EBA\u751F" tabindex="-1"><a class="header-anchor" href="#\u4E94\u3001\u4EE3\u7801\u4EBA\u751F" aria-hidden="true">#</a> \u4E94\u3001\u4EE3\u7801\u4EBA\u751F</h3><ul><li>\u300A\u9ED1\u5BA2\u4E0E\u753B\u5BB6\u300B</li><li>\u300A\u4EBA\u6708\u795E\u8BDD\u300B</li><li>\u300A\u4EBA\u4EF6\u300B</li><li>\u300A\u4EE3\u7801\u5927\u5168\u300B</li><li>\u300A\u6570\u5B66\u4E4B\u7F8E\u300B</li><li>\u300A\u56FE\u7075\u7684\u79D8\u5BC6\u300B</li></ul><p>\u3002\u3002\u3002\u3002\u6301\u7EED\u66F4\u65B0</p><p>\u5F53\u7136\u4E86\uFF0C\u6211\u4E2A\u4EBA\u662F\u6709\u5C40\u9650\u6027\u7684\uFF0C\u5982\u679C\u5927\u5BB6\u6709\u4EC0\u4E48\u597D\u4E66\u4E5F\u53EF\u4EE5\u63A8\u8350\u7ED9\u6211\uFF0C\u6211\u66F4\u65B0\u4E0A\u6765\uFF0C\u4E5F\u4E3A\u540E\u6765\u8005\u63D0\u4F9B\u4E00\u4E2A\u66F4\u4F53\u7CFB\u5316\u7684\u4E66\u5355\u3002</p><p>\u8BB2\u771F\u5FC3\u8BDD\uFF0C\u968F\u7740\u65F6\u95F4\u7684\u63A8\u79FB\uFF0C\u6211\u5BF9\u6574\u4E2A\u8BA1\u7B97\u673A\u4F53\u7CFB\u7684\u8BA4\u77E5\u4E5F\u66F4\u52A0\u5168\u9762\u548C\u6DF1\u523B\u4E86\uFF0C\u90A3\u8FD9\u4EFD\u4E66\u5355\u771F\u7684\u5E0C\u671B\u80FD\u5E2E\u52A9\u5230\u5927\u5BB6\u3002</p><p>\u9700\u8981\u7684\u5C0F\u4F19\u4F34\u8BF7\u626B\u63CF\u4E0B\u65B9\u7684\u4E8C\u7EF4\u7801\u5173\u6CE8\u4F5C\u8005\u7684\u539F\u521B\u516C\u4F17\u53F7\u300C<strong>\u6C89\u9ED8\u738B\u4E8C</strong>\u300D\u56DE\u590D\u5173\u952E\u5B57\u300C<strong>pdf</strong>\u300D\u5C31\u53EF\u4EE5\u62C9\u53D6\u5230\u4E0B\u8F7D\u94FE\u63A5\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongzhonghao.png" alt="\u626B\u7801\u5173\u6CE8\u540E\u56DE\u590D\u300Cpdf\u300D\u5173\u952E\u5B57"></p><p>\u51E0\u5E74\u540E\uFF0C\u4F60\u5C06\u662F\u4E00\u540D\u5584\u4E8E\u89E3\u51B3\u5B9E\u9645\u95EE\u9898\u7684\u5DE5\u7A0B\u5E08\uFF0C\u800C\u4E0D\u662F\u4E00\u540D\u666E\u666E\u901A\u901A\u7684\u7801\u519C\u3002</p><blockquote><p>\u6BCB\u5EB8\u7F6E\u7591\uFF0C\u8FD9\u662F\u4E00\u6761\u574E\u5777\u7684\u8DEF\uFF0C\u4F46\u5B66\u5F1F\u5B66\u59B9\u4EEC\u5C31\u662F\u6765\u62AB\u8346\u65A9\u68D8\u7684\uFF0C\u5BF9\u5427\uFF1F</p></blockquote>',45);function m(j,J){const i=r("ExternalLinkIcon");return n(),h("div",null,[s,c,p,u,b,a("ul",null,[a("li",null,[a("a",g,[_,e(i)])]),a("li",null,[a("a",v,[f,e(i)])])]),x])}var P=t(d,[["render",m],["__file","java.html.vue"]]);export{P as default};
diff --git a/dist/assets/java.html.c5bee727.js b/dist/assets/java.html.c5bee727.js
deleted file mode 100644
index 8826145f..00000000
--- a/dist/assets/java.html.c5bee727.js
+++ /dev/null
@@ -1 +0,0 @@
-const e={key:"v-440da5e9",path:"/download/java.html",title:"Java\u7535\u5B50\u4E66\u4E0B\u8F7D",lang:"zh-CN",frontmatter:{title:"Java\u7535\u5B50\u4E66\u4E0B\u8F7D",category:["\u5B66\u4E60\u8D44\u6E90"],tag:["PDF"],summary:"Java\u7A0B\u5E8F\u5458\u5E38\u8BFB\u4E66\u5355\u{1F4DA}\uFF0C\u9644\u4E0B\u8F7D\u5730\u5740 \u4F1F\u5927\u7684\u9AD8\u5C14\u57FA\u66FE\u8BF4\u8FC7\uFF1A\u201C\u4E66\u7C4D\u662F\u4EBA\u7C7B\u8FDB\u6B65\u7684\u9636\u68AF\u201D\uFF0C\u8BFB\u7ECF\u5178\u7684\u4E66\u5C31\u597D\u50CF\u662F\u7AD9\u5728\u5DE8\u4EBA\u7684\u80A9\u8180\u4E0A\uFF0C\u89C6\u91CE\u66F4\u5F00\u9614\uFF0C\u601D\u8003\u95EE\u9898\u7684\u65B9\u5F0F\u4E5F\u4F1A\u66F4\u5168\u9762\u3002 \u8BB2\u771F\uFF0C\u633A\u9057\u61BE\u7684\uFF0C\u5927\u5B66\u671F\u95F4\uFF0C\u6211\u8BFB\u4E86\u4E0D\u5C11\u5783\u573E\u4E66\uFF0C\u6BD4\u5982\u8BF4\u300A21 \u5929\u5B66\u4F1A xxx\u300B\uFF0C\u300A3 \u5929\u6559\u4F60\u5B66\u4F1A xxx\u300B\u3002 \u76F4\u5230\u5DE5\u4F5C\u540E\u7684\u7B2C\u4E8C\u5E74\uFF0C\u9047\u5230\u4E86\u4E00\u4E2A\u975E\u5E38 nice \u7684\u9886\u5BFC\uFF0C\u4ED6\u7ED9\u6211\u63A8\u8350\u4E86\u4E0D\u5C11\u7ECF\u5178\u7684\u4E66\u5355\uFF0C\u6BD4\u5982\u8BF4\u300A\u4EE3",head:[["meta",{property:"og:url",content:"https://tobebetterjavaer.com/download/java.html"}],["meta",{property:"og:site_name",content:"Java \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF"}],["meta",{property:"og:title",content:"Java\u7535\u5B50\u4E66\u4E0B\u8F7D"}],["meta",{property:"og:type",content:"article"}],["meta",{property:"og:updated_time",content:"2022-05-12T08:24:21.000Z"}],["meta",{property:"og:locale",content:"zh-CN"}],["meta",{property:"article:tag",content:"PDF"}],["meta",{property:"article:modified_time",content:"2022-05-12T08:24:21.000Z"}]]},excerpt:"",headers:[{level:2,title:"\u4E00\u3001\u7F16\u7A0B\u8BED\u8A00",slug:"\u4E00\u3001\u7F16\u7A0B\u8BED\u8A00",children:[{level:3,title:"C\u8BED\u8A00",slug:"c\u8BED\u8A00",children:[]},{level:3,title:"Java \u8BED\u8A00",slug:"java-\u8BED\u8A00",children:[]},{level:3,title:"C++ \u8BED\u8A00",slug:"c-\u8BED\u8A00",children:[]},{level:3,title:"Python \u8BED\u8A00",slug:"python-\u8BED\u8A00",children:[]},{level:3,title:"JavaScript \u8BED\u8A00",slug:"javascript-\u8BED\u8A00",children:[]}]},{level:2,title:"\u4E8C\u3001\u6570\u636E\u7ED3\u6784\u4E0E\u7B97\u6CD5",slug:"\u4E8C\u3001\u6570\u636E\u7ED3\u6784\u4E0E\u7B97\u6CD5",children:[]},{level:2,title:"\u4E09\u3001\u8BA1\u7B97\u673A\u57FA\u7840",slug:"\u4E09\u3001\u8BA1\u7B97\u673A\u57FA\u7840",children:[{level:3,title:"\u64CD\u4F5C\u7CFB\u7EDF",slug:"\u64CD\u4F5C\u7CFB\u7EDF",children:[]},{level:3,title:"\u8BA1\u7B97\u673A\u7EC4\u6210\u539F\u7406",slug:"\u8BA1\u7B97\u673A\u7EC4\u6210\u539F\u7406",children:[]},{level:3,title:"\u8BA1\u7B97\u673A\u7F51\u7EDC",slug:"\u8BA1\u7B97\u673A\u7F51\u7EDC",children:[]},{level:3,title:"\u6570\u636E\u5E93",slug:"\u6570\u636E\u5E93",children:[]},{level:3,title:"\u56DB\u3001\u7F16\u7A0B\u5B9E\u6218",slug:"\u56DB\u3001\u7F16\u7A0B\u5B9E\u6218",children:[]},{level:3,title:"\u4E94\u3001\u4EE3\u7801\u4EBA\u751F",slug:"\u4E94\u3001\u4EE3\u7801\u4EBA\u751F",children:[]}]}],git:{createdTime:1647400271e3,updatedTime:1652343861e3,contributors:[{name:"itwanger",email:"www.qing_gee@163.com",commits:4},{name:"\u6C89\u9ED8\u738B\u4E8C",email:"www.qing_gee@163.com",commits:1}]},readingTime:{minutes:4.48,words:1343},filePathRelative:"download/java.md"};export{e as data};
diff --git a/dist/assets/javadoc.html.6c8ace88.js b/dist/assets/javadoc.html.435ee8ec.js
similarity index 99%
rename from dist/assets/javadoc.html.6c8ace88.js
rename to dist/assets/javadoc.html.435ee8ec.js
index a85db342..2669ea87 100644
--- a/dist/assets/javadoc.html.6c8ace88.js
+++ b/dist/assets/javadoc.html.435ee8ec.js
@@ -1,4 +1,4 @@
-import{_ as a}from"./plugin-vue_export-helper.21dcd24c.js";import{o as e,c as n,e as s}from"./app.a0271b9c.js";const t={},c=s(`<h1 id="java\u6CE8\u91CA-\u5355\u884C\u3001\u591A\u884C\u548C\u6587\u6863\u6CE8\u91CA" tabindex="-1"><a class="header-anchor" href="#java\u6CE8\u91CA-\u5355\u884C\u3001\u591A\u884C\u548C\u6587\u6863\u6CE8\u91CA" aria-hidden="true">#</a> Java\u6CE8\u91CA\uFF1A\u5355\u884C\u3001\u591A\u884C\u548C\u6587\u6863\u6CE8\u91CA</h1><p>\u201C\u4E8C\u54E5\uFF0CJava \u4E2D\u7684\u6CE8\u91CA\u597D\u50CF\u771F\u6CA1\u4EC0\u4E48\u53EF\u8BB2\u7684\uFF0C\u6211\u5DF2\u7ECF\u63D0\u524D\u9884\u4E60\u4E86\uFF0C\u4E0D\u8FC7\u662F\u5355\u884C\u6CE8\u91CA\uFF0C\u591A\u884C\u6CE8\u91CA\uFF0C\u8FD8\u6709\u6587\u6863\u6CE8\u91CA\u3002\u201D\u4E09\u59B9\u7684\u8138\u4E0A\u6CDB\u7740\u751C\u751C\u7684\u7B11\u5BB9\uFF0C\u5979\u7ADF\u7136\u63D0\u524D\u9884\u4E60\u4E86\u63A5\u4E0B\u6765\u8981\u5B66\u4E60\u7684\u77E5\u8BC6\uFF0C\u6709\u4E00\u79CD\u201C\u58EB\u522B\u4E09\u65E5\uFF0C\u5F53\u522E\u76EE\u76F8\u770B\u201D\u7684\u611F\u89C9\u3002</p><p>\u201C\u6CE8\u91CA\u7684\u79CD\u7C7B\u786E\u5B9E\u4E0D\u591A\uFF0C\u4F46\u8FD8\u662F\u633A\u6709\u610F\u601D\u7684\uFF0C\u4E14\u542C\u54E5\u6765\u7ED9\u4F60\u8BF4\u9053\u8BF4\u9053\u3002\u201D</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/overview/fourteen-01.png" alt=""></p><h3 id="_01\u3001\u5355\u884C\u6CE8\u91CA" tabindex="-1"><a class="header-anchor" href="#_01\u3001\u5355\u884C\u6CE8\u91CA" aria-hidden="true">#</a> 01\u3001\u5355\u884C\u6CE8\u91CA</h3><p>\u5355\u884C\u6CE8\u91CA\u901A\u5E38\u7528\u4E8E\u89E3\u91CA\u65B9\u6CD5\u5185\u67D0\u5355\u884C\u4EE3\u7801\u7684\u4F5C\u7528\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">method</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
+import{_ as a}from"./plugin-vue_export-helper.21dcd24c.js";import{o as e,c as n,e as s}from"./app.615e41d8.js";const t={},c=s(`<h1 id="java\u6CE8\u91CA-\u5355\u884C\u3001\u591A\u884C\u548C\u6587\u6863\u6CE8\u91CA" tabindex="-1"><a class="header-anchor" href="#java\u6CE8\u91CA-\u5355\u884C\u3001\u591A\u884C\u548C\u6587\u6863\u6CE8\u91CA" aria-hidden="true">#</a> Java\u6CE8\u91CA\uFF1A\u5355\u884C\u3001\u591A\u884C\u548C\u6587\u6863\u6CE8\u91CA</h1><p>\u201C\u4E8C\u54E5\uFF0CJava \u4E2D\u7684\u6CE8\u91CA\u597D\u50CF\u771F\u6CA1\u4EC0\u4E48\u53EF\u8BB2\u7684\uFF0C\u6211\u5DF2\u7ECF\u63D0\u524D\u9884\u4E60\u4E86\uFF0C\u4E0D\u8FC7\u662F\u5355\u884C\u6CE8\u91CA\uFF0C\u591A\u884C\u6CE8\u91CA\uFF0C\u8FD8\u6709\u6587\u6863\u6CE8\u91CA\u3002\u201D\u4E09\u59B9\u7684\u8138\u4E0A\u6CDB\u7740\u751C\u751C\u7684\u7B11\u5BB9\uFF0C\u5979\u7ADF\u7136\u63D0\u524D\u9884\u4E60\u4E86\u63A5\u4E0B\u6765\u8981\u5B66\u4E60\u7684\u77E5\u8BC6\uFF0C\u6709\u4E00\u79CD\u201C\u58EB\u522B\u4E09\u65E5\uFF0C\u5F53\u522E\u76EE\u76F8\u770B\u201D\u7684\u611F\u89C9\u3002</p><p>\u201C\u6CE8\u91CA\u7684\u79CD\u7C7B\u786E\u5B9E\u4E0D\u591A\uFF0C\u4F46\u8FD8\u662F\u633A\u6709\u610F\u601D\u7684\uFF0C\u4E14\u542C\u54E5\u6765\u7ED9\u4F60\u8BF4\u9053\u8BF4\u9053\u3002\u201D</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/overview/fourteen-01.png" alt=""></p><h3 id="_01\u3001\u5355\u884C\u6CE8\u91CA" tabindex="-1"><a class="header-anchor" href="#_01\u3001\u5355\u884C\u6CE8\u91CA" aria-hidden="true">#</a> 01\u3001\u5355\u884C\u6CE8\u91CA</h3><p>\u5355\u884C\u6CE8\u91CA\u901A\u5E38\u7528\u4E8E\u89E3\u91CA\u65B9\u6CD5\u5185\u67D0\u5355\u884C\u4EE3\u7801\u7684\u4F5C\u7528\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">method</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
     <span class="token keyword">int</span> age <span class="token operator">=</span> <span class="token number">18</span><span class="token punctuation">;</span> <span class="token comment">// age \u7528\u4E8E\u8868\u793A\u5E74\u9F84</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p><strong>\u4F46\u5982\u679C\u5199\u5728\u884C\u5C3E\u7684\u8BDD\uFF0C\u5176\u5B9E\u662F\u4E0D\u7B26\u5408\u963F\u91CC\u5DF4\u5DF4\u7684\u5F00\u53D1\u89C4\u7EA6\u7684</strong>\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/overview/fourteen-02.png" alt=""></p><p>\u6B63\u786E\u7684\u5355\u884C\u6CE8\u91CA\u5982\u4E0A\u56FE\u4E2D\u6240\u8BF4\uFF0C\u5728\u88AB\u6CE8\u91CA\u8BED\u53E5\u4E0A\u65B9\u53E6\u8D77\u4E00\u884C\uFF0C\u4F7F\u7528 <code>//</code> \u6CE8\u91CA\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">method</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
diff --git a/dist/assets/javase.html.d7cb534c.js b/dist/assets/javase.html.4c6f74ba.js
similarity index 99%
rename from dist/assets/javase.html.d7cb534c.js
rename to dist/assets/javase.html.4c6f74ba.js
index 7426fa46..19359b4e 100644
--- a/dist/assets/javase.html.d7cb534c.js
+++ b/dist/assets/javase.html.4c6f74ba.js
@@ -1,4 +1,4 @@
-import{_ as e}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o,c,a,b as t,d as n,e as i}from"./app.a0271b9c.js";const l={},u=a("h1",{id:"\u9762\u6E23\u9006\u88AD-java-\u57FA\u7840\u7BC7-\u5FC5\u770B",tabindex:"-1"},[a("a",{class:"header-anchor",href:"#\u9762\u6E23\u9006\u88AD-java-\u57FA\u7840\u7BC7-\u5FC5\u770B","aria-hidden":"true"},"#"),n(" \u9762\u6E23\u9006\u88AD\uFF08Java \u57FA\u7840\u7BC7\uFF09\u5FC5\u770B\u{1F44D}")],-1),r=n("\u56FE\u6587\u8BE6\u89E3 53 \u9053Java\u57FA\u7840\u9762\u8BD5\u9AD8\u9891\u9898\uFF0C\u8FD9\u6B21\u540A\u6253\u9762\u8BD5\u5B98\uFF0C\u6211\u89C9\u5F97\u7A33\u4E86\uFF08\u624B\u52A8 dog\uFF09\u3002\u6574\u7406\uFF1A\u6C89\u9ED8\u738B\u4E8C\uFF0C\u6233"),d={href:"https://mp.weixin.qq.com/s/t7EYyF0VGEg1rAZut9dwSw",target:"_blank",rel:"noopener noreferrer"},k=n("\u8F6C\u8F7D\u94FE\u63A5"),v=n("\uFF0C\u4F5C\u8005\uFF1A\u4E09\u5206\u6076\uFF0C\u6233"),b={href:"https://mp.weixin.qq.com/s/M-6RSRcRd3X93cR7VXpanw",target:"_blank",rel:"noopener noreferrer"},m=n("\u539F\u6587\u94FE\u63A5"),g=n("\u3002"),h=i(`<h2 id="java-\u6982\u8FF0" tabindex="-1"><a class="header-anchor" href="#java-\u6982\u8FF0" aria-hidden="true">#</a> Java \u6982\u8FF0</h2><h3 id="_1-\u4EC0\u4E48\u662F-java" tabindex="-1"><a class="header-anchor" href="#_1-\u4EC0\u4E48\u662F-java" aria-hidden="true">#</a> 1.\u4EC0\u4E48\u662F Java\uFF1F</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/javase-1.png" alt="\u4E0B\u8F88\u5B50\u8FD8\u5B66Java"></p><p>PS\uFF1A\u788E\u6002 Java\uFF0C\u6709\u5565\u597D\u4ECB\u7ECD\u7684\u3002\u54E6\uFF0C\u9762\u8BD5\u554A\u3002</p><p>Java \u662F\u4E00\u95E8\u9762\u5411\u5BF9\u8C61\u7684\u7F16\u7A0B\u8BED\u8A00\uFF0C\u4E0D\u4EC5\u5438\u6536\u4E86 C++\u8BED\u8A00\u7684\u5404\u79CD\u4F18\u70B9\uFF0C\u8FD8\u6452\u5F03\u4E86 C++\u91CC\u96BE\u4EE5\u7406\u89E3\u7684\u591A\u7EE7\u627F\u3001\u6307\u9488\u7B49\u6982\u5FF5\uFF0C\u56E0\u6B64 Java \u8BED\u8A00\u5177\u6709\u529F\u80FD\u5F3A\u5927\u548C\u7B80\u5355\u6613\u7528\u4E24\u4E2A\u7279\u5F81\u3002Java \u8BED\u8A00\u4F5C\u4E3A\u9759\u6001\u9762\u5411\u5BF9\u8C61\u7F16\u7A0B\u8BED\u8A00\u7684\u4F18\u79C0\u4EE3\u8868\uFF0C\u6781\u597D\u5730\u5B9E\u73B0\u4E86\u9762\u5411\u5BF9\u8C61\u7406\u8BBA\uFF0C\u5141\u8BB8\u7A0B\u5E8F\u5458\u4EE5\u4F18\u96C5\u7684\u601D\u7EF4\u65B9\u5F0F\u8FDB\u884C\u590D\u6742\u7684\u7F16\u7A0B \u3002</p><h3 id="_2-java-\u8BED\u8A00\u6709\u54EA\u4E9B\u7279\u70B9" tabindex="-1"><a class="header-anchor" href="#_2-java-\u8BED\u8A00\u6709\u54EA\u4E9B\u7279\u70B9" aria-hidden="true">#</a> 2.Java \u8BED\u8A00\u6709\u54EA\u4E9B\u7279\u70B9\uFF1F</h3><p>Java \u8BED\u8A00\u6709\u5F88\u591A\u4F18\u79C0\uFF08\u53EF\u5439\uFF09\u7684\u7279\u70B9\uFF0C\u4EE5\u4E0B\u51E0\u4E2A\u662F\u6BD4\u8F83\u7A81\u51FA\u7684\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/javase-2.png" alt="Java\u8BED\u8A00\u7279\u70B9"></p><ul><li>\u9762\u5411\u5BF9\u8C61\uFF08\u5C01\u88C5\uFF0C\u7EE7\u627F\uFF0C\u591A\u6001\uFF09\uFF1B</li><li>\u5E73\u53F0\u65E0\u5173\u6027\uFF0C\u5E73\u53F0\u65E0\u5173\u6027\u7684\u5177\u4F53\u8868\u73B0\u5728\u4E8E\uFF0CJava \u662F\u201C\u4E00\u6B21\u7F16\u5199\uFF0C\u5230\u5904\u8FD0\u884C\uFF08Write Once\uFF0CRun any Where\uFF09\u201D\u7684\u8BED\u8A00\uFF0C\u56E0\u6B64\u91C7\u7528 Java \u8BED\u8A00\u7F16\u5199\u7684\u7A0B\u5E8F\u5177\u6709\u5F88\u597D\u7684\u53EF\u79FB\u690D\u6027\uFF0C\u800C\u4FDD\u8BC1\u8FD9\u4E00\u70B9\u7684\u6B63\u662F Java \u7684\u865A\u62DF\u673A\u673A\u5236\u3002\u5728\u5F15\u5165\u865A\u62DF\u673A\u4E4B\u540E\uFF0CJava \u8BED\u8A00\u5728\u4E0D\u540C\u7684\u5E73\u53F0\u4E0A\u8FD0\u884C\u4E0D\u9700\u8981\u91CD\u65B0\u7F16\u8BD1\u3002</li><li>\u652F\u6301\u591A\u7EBF\u7A0B\u3002C++ \u8BED\u8A00\u6CA1\u6709\u5185\u7F6E\u7684\u591A\u7EBF\u7A0B\u673A\u5236\uFF0C\u56E0\u6B64\u5FC5\u987B\u8C03\u7528\u64CD\u4F5C\u7CFB\u7EDF\u7684\u591A\u7EBF\u7A0B\u529F\u80FD\u6765\u8FDB\u884C\u591A\u7EBF\u7A0B\u7A0B\u5E8F\u8BBE\u8BA1\uFF0C\u800C Java \u8BED\u8A00\u5374\u63D0\u4F9B\u4E86\u591A\u7EBF\u7A0B\u652F\u6301\uFF1B</li><li>\u7F16\u8BD1\u4E0E\u89E3\u91CA\u5E76\u5B58\uFF1B</li></ul><h3 id="_3-jvm\u3001jdk-\u548C-jre-\u6709\u4EC0\u4E48\u533A\u522B" tabindex="-1"><a class="header-anchor" href="#_3-jvm\u3001jdk-\u548C-jre-\u6709\u4EC0\u4E48\u533A\u522B" aria-hidden="true">#</a> 3.JVM\u3001JDK \u548C JRE \u6709\u4EC0\u4E48\u533A\u522B\uFF1F</h3><p><strong>JVM</strong>\uFF1AJava Virtual Machine\uFF0CJava \u865A\u62DF\u673A\uFF0CJava \u7A0B\u5E8F\u8FD0\u884C\u5728 Java \u865A\u62DF\u673A\u4E0A\u3002\u9488\u5BF9\u4E0D\u540C\u7CFB\u7EDF\u7684\u5B9E\u73B0\uFF08Windows\uFF0CLinux\uFF0CmacOS\uFF09\u4E0D\u540C\u7684 JVM\uFF0C\u56E0\u6B64 Java \u8BED\u8A00\u53EF\u4EE5\u5B9E\u73B0\u8DE8\u5E73\u53F0\u3002</p><p><strong>JRE</strong>\uFF1A Java \u8FD0\u2F8F\u65F6\u73AF\u5883\u3002\u5B83\u662F\u8FD0\u2F8F\u5DF2\u7F16\u8BD1 Java \u7A0B\u5E8F\u6240\u9700\u7684\u6240\u6709\u5185\u5BB9\u7684\u96C6\u5408\uFF0C\u5305\u62EC Java \u865A\u62DF\u673A\uFF08JVM\uFF09\uFF0CJava \u7C7B\u5E93\uFF0CJava \u547D\u4EE4\u548C\u5176\u4ED6\u7684\u2F00\u4E9B\u57FA\u7840\u6784\u4EF6\u3002\u4F46\u662F\uFF0C\u5B83\u4E0D\u80FD\u2F64\u4E8E\u521B\u5EFA\u65B0\u7A0B\u5E8F\u3002</p><p><strong>JDK</strong>: Java Development Kit\uFF0C\u5B83\u662F\u529F\u80FD\u2EEC\u5168\u7684 Java SDK\u3002\u5B83\u62E5\u6709 JRE \u6240\u62E5\u6709\u7684\u2F00\u5207\uFF0C\u8FD8\u6709\u7F16\u8BD1\u5668\uFF08javac\uFF09\u548C\u2F2F\u5177\uFF08\u5982 javadoc \u548C jdb\uFF09\u3002\u5B83\u80FD\u591F\u521B\u5EFA\u548C\u7F16\u8BD1\u7A0B\u5E8F\u3002</p><p>\u7B80\u5355\u6765\u8BF4\uFF0CJDK \u5305\u542B JRE\uFF0CJRE \u5305\u542B JVM\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/javase-3.png" alt="JDK\u3001JRE\u3001JVM\u5173\u7CFB"></p><h3 id="_4-\u8BF4\u8BF4\u4EC0\u4E48\u662F\u8DE8\u5E73\u53F0\u6027-\u539F\u7406\u662F\u4EC0\u4E48" tabindex="-1"><a class="header-anchor" href="#_4-\u8BF4\u8BF4\u4EC0\u4E48\u662F\u8DE8\u5E73\u53F0\u6027-\u539F\u7406\u662F\u4EC0\u4E48" aria-hidden="true">#</a> 4.\u8BF4\u8BF4\u4EC0\u4E48\u662F\u8DE8\u5E73\u53F0\u6027\uFF1F\u539F\u7406\u662F\u4EC0\u4E48</h3><p>\u6240\u8C13\u8DE8\u5E73\u53F0\u6027\uFF0C\u662F\u6307 Java \u8BED\u8A00\u7F16\u5199\u7684\u7A0B\u5E8F\uFF0C\u4E00\u6B21\u7F16\u8BD1\u540E\uFF0C\u53EF\u4EE5\u5728\u591A\u4E2A\u7CFB\u7EDF\u5E73\u53F0\u4E0A\u8FD0\u884C\u3002</p><p>\u5B9E\u73B0\u539F\u7406\uFF1AJava \u7A0B\u5E8F\u662F\u901A\u8FC7 Java \u865A\u62DF\u673A\u5728\u7CFB\u7EDF\u5E73\u53F0\u4E0A\u8FD0\u884C\u7684\uFF0C\u53EA\u8981\u8BE5\u7CFB\u7EDF\u53EF\u4EE5\u5B89\u88C5\u76F8\u5E94\u7684 Java \u865A\u62DF\u673A\uFF0C\u8BE5\u7CFB\u7EDF\u5C31\u53EF\u4EE5\u8FD0\u884C java \u7A0B\u5E8F\u3002</p><h3 id="_5-\u4EC0\u4E48\u662F\u5B57\u8282\u7801-\u91C7\u7528\u5B57\u8282\u7801\u7684\u597D\u5904\u662F\u4EC0\u4E48" tabindex="-1"><a class="header-anchor" href="#_5-\u4EC0\u4E48\u662F\u5B57\u8282\u7801-\u91C7\u7528\u5B57\u8282\u7801\u7684\u597D\u5904\u662F\u4EC0\u4E48" aria-hidden="true">#</a> 5.\u4EC0\u4E48\u662F\u5B57\u8282\u7801\uFF1F\u91C7\u7528\u5B57\u8282\u7801\u7684\u597D\u5904\u662F\u4EC0\u4E48?</h3><p>\u6240\u8C13\u7684\u5B57\u8282\u7801\uFF0C\u5C31\u662F Java \u7A0B\u5E8F\u7ECF\u8FC7\u7F16\u8BD1\u4E4B\u7C7B\u4EA7\u751F\u7684.class \u6587\u4EF6\uFF0C\u5B57\u8282\u7801\u80FD\u591F\u88AB\u865A\u62DF\u673A\u8BC6\u522B\uFF0C\u4ECE\u800C\u5B9E\u73B0 Java \u7A0B\u5E8F\u7684\u8DE8\u5E73\u53F0\u6027\u3002</p><p><strong>Java</strong> \u7A0B\u5E8F\u4ECE\u6E90\u4EE3\u7801\u5230\u8FD0\u884C\u4E3B\u8981\u6709\u4E09\u6B65\uFF1A</p><ul><li><strong>\u7F16\u8BD1</strong>\uFF1A\u5C06\u6211\u4EEC\u7684\u4EE3\u7801\uFF08.java\uFF09\u7F16\u8BD1\u6210\u865A\u62DF\u673A\u53EF\u4EE5\u8BC6\u522B\u7406\u89E3\u7684\u5B57\u8282\u7801(.class)</li><li><strong>\u89E3\u91CA</strong>\uFF1A\u865A\u62DF\u673A\u6267\u884C Java \u5B57\u8282\u7801\uFF0C\u5C06\u5B57\u8282\u7801\u7FFB\u8BD1\u6210\u673A\u5668\u80FD\u8BC6\u522B\u7684\u673A\u5668\u7801</li><li><strong>\u6267\u884C</strong>\uFF1A\u5BF9\u5E94\u7684\u673A\u5668\u6267\u884C\u4E8C\u8FDB\u5236\u673A\u5668\u7801</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/javase-4.png" alt="Java\u7A0B\u5E8F\u6267\u884C\u8FC7\u7A0B"></p><p>\u53EA\u9700\u8981\u628A Java \u7A0B\u5E8F\u7F16\u8BD1\u6210 Java \u865A\u62DF\u673A\u80FD\u8BC6\u522B\u7684 Java \u5B57\u8282\u7801\uFF0C\u4E0D\u540C\u7684\u5E73\u53F0\u5B89\u88C5\u5BF9\u5E94\u7684 Java \u865A\u62DF\u673A\uFF0C\u8FD9\u6837\u5C31\u53EF\u4EE5\u53EF\u4EE5\u5B9E\u73B0 Java \u8BED\u8A00\u7684\u5E73\u53F0\u65E0\u5173\u6027\u3002</p><h3 id="_6-\u4E3A\u4EC0\u4E48\u8BF4-java-\u8BED\u8A00-\u7F16\u8BD1\u4E0E\u89E3\u91CA\u5E76\u5B58" tabindex="-1"><a class="header-anchor" href="#_6-\u4E3A\u4EC0\u4E48\u8BF4-java-\u8BED\u8A00-\u7F16\u8BD1\u4E0E\u89E3\u91CA\u5E76\u5B58" aria-hidden="true">#</a> 6.\u4E3A\u4EC0\u4E48\u8BF4 Java \u8BED\u8A00\u201C\u7F16\u8BD1\u4E0E\u89E3\u91CA\u5E76\u5B58\u201D\uFF1F</h3><p>\u9AD8\u7EA7\u7F16\u7A0B\u8BED\u8A00\u6309\u7167\u7A0B\u5E8F\u7684\u6267\u884C\u65B9\u5F0F\u5206\u4E3A<strong>\u7F16\u8BD1\u578B</strong>\u548C<strong>\u89E3\u91CA\u578B</strong>\u4E24\u79CD\u3002</p><p>\u7B80\u5355\u6765\u8BF4\uFF0C\u7F16\u8BD1\u578B\u8BED\u8A00\u662F\u6307\u7F16\u8BD1\u5668\u9488\u5BF9\u7279\u5B9A\u7684\u64CD\u4F5C\u7CFB\u7EDF\u5C06\u6E90\u4EE3\u7801\u4E00\u6B21\u6027\u7FFB\u8BD1\u6210\u53EF\u88AB\u8BE5\u5E73\u53F0\u6267\u884C\u7684\u673A\u5668\u7801\uFF1B\u89E3\u91CA\u578B\u8BED\u8A00\u662F\u6307\u89E3\u91CA\u5668\u5BF9\u6E90\u7A0B\u5E8F\u9010\u884C\u89E3\u91CA\u6210\u7279\u5B9A\u5E73\u53F0\u7684\u673A\u5668\u7801\u5E76\u7ACB\u5373\u6267\u884C\u3002</p><p>\u6BD4\u5982\uFF0C\u4F60\u60F3\u8BFB\u4E00\u672C\u5916\u56FD\u7684\u5C0F\u8BF4\uFF0C\u4F60\u53EF\u4EE5\u627E\u4E00\u4E2A\u7FFB\u8BD1\u4EBA\u5458\u5E2E\u52A9\u4F60\u7FFB\u8BD1\uFF0C\u6709\u4E24\u79CD\u9009\u62E9\u65B9\u5F0F\uFF0C\u4F60\u53EF\u4EE5\u5148\u7B49\u7FFB\u8BD1\u4EBA\u5458\u5C06\u5168\u672C\u7684\u5C0F\u8BF4\uFF08\u4E5F\u5C31\u662F\u6E90\u7801\uFF09\u90FD\u7FFB\u8BD1\u6210\u6C49\u8BED\uFF0C\u518D\u53BB\u9605\u8BFB\uFF0C\u4E5F\u53EF\u4EE5\u8BA9\u7FFB\u8BD1\u4EBA\u5458\u7FFB\u8BD1\u4E00\u6BB5\uFF0C\u4F60\u5728\u65C1\u8FB9\u9605\u8BFB\u4E00\u6BB5\uFF0C\u6162\u6162\u628A\u4E66\u8BFB\u5B8C\u3002</p><p>Java \u8BED\u8A00\u65E2\u5177\u6709\u7F16\u8BD1\u578B\u8BED\u8A00\u7684\u7279\u5F81\uFF0C\u4E5F\u5177\u6709\u89E3\u91CA\u578B\u8BED\u8A00\u7684\u7279\u5F81\uFF0C\u56E0\u4E3A Java \u7A0B\u5E8F\u8981\u7ECF\u8FC7\u5148\u7F16\u8BD1\uFF0C\u540E\u89E3\u91CA\u4E24\u4E2A\u6B65\u9AA4\uFF0C\u7531 Java \u7F16\u5199\u7684\u7A0B\u5E8F\u9700\u8981\u5148\u7ECF\u8FC7\u7F16\u8BD1\u6B65\u9AA4\uFF0C\u751F\u6210\u5B57\u8282\u7801\uFF08<code>\\*.class</code> \u6587\u4EF6\uFF09\uFF0C\u8FD9\u79CD\u5B57\u8282\u7801\u5FC5\u987B\u518D\u7ECF\u8FC7 JVM\uFF0C\u89E3\u91CA\u6210\u64CD\u4F5C\u7CFB\u7EDF\u80FD\u8BC6\u522B\u7684\u673A\u5668\u7801\uFF0C\u5728\u7531\u64CD\u4F5C\u7CFB\u7EDF\u6267\u884C\u3002\u56E0\u6B64\uFF0C\u6211\u4EEC\u53EF\u4EE5\u8BA4\u4E3A Java \u8BED\u8A00<strong>\u7F16\u8BD1</strong>\u4E0E<strong>\u89E3\u91CA</strong>\u5E76\u5B58\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/javase-5.png" alt="\u7F16\u8BD1\u4E0E\u89E3\u91CA"></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><h2 id="\u57FA\u7840\u8BED\u6CD5" tabindex="-1"><a class="header-anchor" href="#\u57FA\u7840\u8BED\u6CD5" aria-hidden="true">#</a> \u57FA\u7840\u8BED\u6CD5</h2><h3 id="_7-java-\u6709\u54EA\u4E9B\u6570\u636E\u7C7B\u578B" tabindex="-1"><a class="header-anchor" href="#_7-java-\u6709\u54EA\u4E9B\u6570\u636E\u7C7B\u578B" aria-hidden="true">#</a> 7.Java \u6709\u54EA\u4E9B\u6570\u636E\u7C7B\u578B\uFF1F</h3><p><b>\u5B9A\u4E49\uFF1A</b>Java \u8BED\u8A00\u662F\u5F3A\u7C7B\u578B\u8BED\u8A00\uFF0C\u5BF9\u4E8E\u6BCF\u4E00\u79CD\u6570\u636E\u90FD\u5B9A\u4E49\u4E86\u660E\u786E\u7684\u5177\u4F53\u7684\u6570\u636E\u7C7B\u578B\uFF0C\u5728\u5185\u5B58\u4E2D\u5206\u914D\u4E86\u4E0D\u540C\u5927\u5C0F\u7684\u5185\u5B58\u7A7A\u95F4\u3002</p><p>Java \u8BED\u8A00\u6570\u636E\u7C7B\u578B\u5206\u4E3A\u4E24\u79CD\uFF1A<strong>\u57FA\u672C\u6570\u636E\u7C7B\u578B</strong>\u548C<strong>\u5F15\u7528\u6570\u636E\u7C7B\u578B</strong>\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/javase-6.png" alt="Java\u6570\u636E\u7C7B\u578B"></p><p><b>\u57FA\u672C\u6570\u636E\u7C7B\u578B\uFF1A</b></p><ul><li>\u6570\u503C\u578B <ul><li>\u6574\u6570\u7C7B\u578B\uFF08byte\u3001short\u3001int\u3001long\uFF09</li><li>\u6D6E\u70B9\u7C7B\u578B\uFF08float\u3001double\uFF09</li></ul></li><li>\u5B57\u7B26\u578B\uFF08char\uFF09</li><li>\u5E03\u5C14\u578B\uFF08boolean\uFF09</li></ul><p>Java \u57FA\u672C\u6570\u636E\u7C7B\u578B\u8303\u56F4\u548C\u9ED8\u8BA4\u503C\uFF1A</p><table><thead><tr><th>\u57FA\u672C\u7C7B\u578B</th><th>\u4F4D\u6570</th><th>\u5B57\u8282</th><th>\u9ED8\u8BA4\u503C</th></tr></thead><tbody><tr><td><code>int</code></td><td>32</td><td>4</td><td>0</td></tr><tr><td><code>short</code></td><td>16</td><td>2</td><td>0</td></tr><tr><td><code>long</code></td><td>64</td><td>8</td><td>0L</td></tr><tr><td><code>byte</code></td><td>8</td><td>1</td><td>0</td></tr><tr><td><code>char</code></td><td>16</td><td>2</td><td>&#39;u0000&#39;</td></tr><tr><td><code>float</code></td><td>32</td><td>4</td><td>0f</td></tr><tr><td><code>double</code></td><td>64</td><td>8</td><td>0d</td></tr><tr><td><code>boolean</code></td><td>1</td><td></td><td>false</td></tr></tbody></table><p><strong>\u5F15\u7528\u6570\u636E\u7C7B\u578B\uFF1A</strong></p><ul><li>\u7C7B\uFF08class\uFF09</li><li>\u63A5\u53E3\uFF08interface\uFF09</li><li>\u6570\u7EC4([])</li></ul><h3 id="_8-\u81EA\u52A8\u7C7B\u578B\u8F6C\u6362\u3001\u5F3A\u5236\u7C7B\u578B\u8F6C\u6362-\u770B\u770B\u8FD9\u51E0\u884C\u4EE3\u7801" tabindex="-1"><a class="header-anchor" href="#_8-\u81EA\u52A8\u7C7B\u578B\u8F6C\u6362\u3001\u5F3A\u5236\u7C7B\u578B\u8F6C\u6362-\u770B\u770B\u8FD9\u51E0\u884C\u4EE3\u7801" aria-hidden="true">#</a> 8.\u81EA\u52A8\u7C7B\u578B\u8F6C\u6362\u3001\u5F3A\u5236\u7C7B\u578B\u8F6C\u6362\uFF1F\u770B\u770B\u8FD9\u51E0\u884C\u4EE3\u7801\uFF1F</h3><p>Java \u6240\u6709\u7684\u6570\u503C\u578B\u53D8\u91CF\u53EF\u4EE5\u76F8\u4E92\u8F6C\u6362\uFF0C\u5F53\u628A\u4E00\u4E2A\u8868\u6570\u8303\u56F4\u5C0F\u7684\u6570\u503C\u6216\u53D8\u91CF\u76F4\u63A5\u8D4B\u7ED9\u53E6\u4E00\u4E2A\u8868\u6570\u8303\u56F4\u5927\u7684\u53D8\u91CF\u65F6\uFF0C\u53EF\u4EE5\u8FDB\u884C\u81EA\u52A8\u7C7B\u578B\u8F6C\u6362\uFF1B\u53CD\u4E4B\uFF0C\u9700\u8981\u5F3A\u5236\u8F6C\u6362\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/javase-7.png" alt="Java\u81EA\u52A8\u7C7B\u578B\u8F6C\u6362\u65B9\u5411"></p><p>\u8FD9\u5C31\u597D\u50CF\uFF0C\u5C0F\u676F\u91CC\u7684\u6C34\u5012\u8FDB\u5927\u676F\u6CA1\u95EE\u9898\uFF0C\u4F46\u5927\u676F\u7684\u6C34\u5012\u8FDB\u5C0F\u676F\u5C31\u4E0D\u884C\u4E86\uFF0C\u53EF\u80FD\u4F1A\u6EA2\u51FA\u3002</p><blockquote><p><code>float f=3.4</code>\uFF0C\u5BF9\u5417\uFF1F</p></blockquote><p>\u4E0D\u6B63\u786E\u30023.4 \u662F\u5355\u7CBE\u5EA6\u6570\uFF0C\u5C06\u53CC\u7CBE\u5EA6\u578B\uFF08double\uFF09\u8D4B\u503C\u7ED9\u6D6E\u70B9\u578B\uFF08float\uFF09\u5C5E\u4E8E\u4E0B\u8F6C\u578B\uFF08down-casting\uFF0C\u4E5F\u79F0\u4E3A\u7A84\u5316\uFF09\u4F1A\u9020\u6210\u7CBE\u5EA6\u635F\u5931\uFF0C\u56E0\u6B64\u9700\u8981\u5F3A\u5236\u7C7B\u578B\u8F6C\u6362<code>float f =(float)3.4;</code>\u6216\u8005\u5199\u6210<code>float f =3.4F</code></p><blockquote><p><code>short s1 = 1; s1 = s1 + 1\uFF1B</code>\u5BF9\u5417\uFF1F<code>short s1 = 1; s1 += 1;</code>\u5BF9\u5417\uFF1F</p></blockquote><p>\u5BF9\u4E8E short s1 = 1; s1 = s1 + 1;\u7F16\u8BD1\u51FA\u9519\uFF0C\u7531\u4E8E 1 \u662F int \u7C7B\u578B\uFF0C\u56E0\u6B64 s1+1 \u8FD0\u7B97\u7ED3\u679C\u4E5F\u662F int \u578B\uFF0C\u9700\u8981\u5F3A\u5236\u8F6C\u6362\u7C7B\u578B\u624D\u80FD\u8D4B\u503C\u7ED9 short \u578B\u3002</p><p>\u800C short s1 = 1; s1 += 1;\u53EF\u4EE5\u6B63\u786E\u7F16\u8BD1\uFF0C\u56E0\u4E3A s1+= 1;\u76F8\u5F53\u4E8E s1 = (short(s1 + 1);\u5176\u4E2D\u6709\u9690\u542B\u7684\u5F3A\u5236\u7C7B\u578B\u8F6C\u6362\u3002</p><h3 id="_9-\u4EC0\u4E48\u662F\u81EA\u52A8\u62C6\u7BB1-\u5C01\u7BB1" tabindex="-1"><a class="header-anchor" href="#_9-\u4EC0\u4E48\u662F\u81EA\u52A8\u62C6\u7BB1-\u5C01\u7BB1" aria-hidden="true">#</a> 9.\u4EC0\u4E48\u662F\u81EA\u52A8\u62C6\u7BB1/\u5C01\u7BB1\uFF1F</h3><ul><li><strong>\u88C5\u7BB1</strong>\uFF1A\u5C06\u57FA\u672C\u7C7B\u578B\u7528\u5B83\u4EEC\u5BF9\u5E94\u7684\u5F15\u7528\u7C7B\u578B\u5305\u88C5\u8D77\u6765\uFF1B</li><li><strong>\u62C6\u7BB1</strong>\uFF1A\u5C06\u5305\u88C5\u7C7B\u578B\u8F6C\u6362\u4E3A\u57FA\u672C\u6570\u636E\u7C7B\u578B\uFF1B</li></ul><p>Java \u53EF\u4EE5\u81EA\u52A8\u5BF9\u57FA\u672C\u6570\u636E\u7C7B\u578B\u548C\u5B83\u4EEC\u7684\u5305\u88C5\u7C7B\u8FDB\u884C\u88C5\u7BB1\u548C\u62C6\u7BB1\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/javase-8.png" alt="\u88C5\u7BB1\u548C\u62C6\u7BB1"></p><p>\u4E3E\u4F8B\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">Integer</span> i <span class="token operator">=</span> <span class="token number">10</span><span class="token punctuation">;</span>  <span class="token comment">//\u88C5\u7BB1</span>
+import{_ as e}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o,c,a,b as t,d as n,e as i}from"./app.615e41d8.js";const l={},u=a("h1",{id:"\u9762\u6E23\u9006\u88AD-java-\u57FA\u7840\u7BC7-\u5FC5\u770B",tabindex:"-1"},[a("a",{class:"header-anchor",href:"#\u9762\u6E23\u9006\u88AD-java-\u57FA\u7840\u7BC7-\u5FC5\u770B","aria-hidden":"true"},"#"),n(" \u9762\u6E23\u9006\u88AD\uFF08Java \u57FA\u7840\u7BC7\uFF09\u5FC5\u770B\u{1F44D}")],-1),r=n("\u56FE\u6587\u8BE6\u89E3 53 \u9053Java\u57FA\u7840\u9762\u8BD5\u9AD8\u9891\u9898\uFF0C\u8FD9\u6B21\u540A\u6253\u9762\u8BD5\u5B98\uFF0C\u6211\u89C9\u5F97\u7A33\u4E86\uFF08\u624B\u52A8 dog\uFF09\u3002\u6574\u7406\uFF1A\u6C89\u9ED8\u738B\u4E8C\uFF0C\u6233"),d={href:"https://mp.weixin.qq.com/s/t7EYyF0VGEg1rAZut9dwSw",target:"_blank",rel:"noopener noreferrer"},k=n("\u8F6C\u8F7D\u94FE\u63A5"),v=n("\uFF0C\u4F5C\u8005\uFF1A\u4E09\u5206\u6076\uFF0C\u6233"),b={href:"https://mp.weixin.qq.com/s/M-6RSRcRd3X93cR7VXpanw",target:"_blank",rel:"noopener noreferrer"},m=n("\u539F\u6587\u94FE\u63A5"),g=n("\u3002"),h=i(`<h2 id="java-\u6982\u8FF0" tabindex="-1"><a class="header-anchor" href="#java-\u6982\u8FF0" aria-hidden="true">#</a> Java \u6982\u8FF0</h2><h3 id="_1-\u4EC0\u4E48\u662F-java" tabindex="-1"><a class="header-anchor" href="#_1-\u4EC0\u4E48\u662F-java" aria-hidden="true">#</a> 1.\u4EC0\u4E48\u662F Java\uFF1F</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/javase-1.png" alt="\u4E0B\u8F88\u5B50\u8FD8\u5B66Java"></p><p>PS\uFF1A\u788E\u6002 Java\uFF0C\u6709\u5565\u597D\u4ECB\u7ECD\u7684\u3002\u54E6\uFF0C\u9762\u8BD5\u554A\u3002</p><p>Java \u662F\u4E00\u95E8\u9762\u5411\u5BF9\u8C61\u7684\u7F16\u7A0B\u8BED\u8A00\uFF0C\u4E0D\u4EC5\u5438\u6536\u4E86 C++\u8BED\u8A00\u7684\u5404\u79CD\u4F18\u70B9\uFF0C\u8FD8\u6452\u5F03\u4E86 C++\u91CC\u96BE\u4EE5\u7406\u89E3\u7684\u591A\u7EE7\u627F\u3001\u6307\u9488\u7B49\u6982\u5FF5\uFF0C\u56E0\u6B64 Java \u8BED\u8A00\u5177\u6709\u529F\u80FD\u5F3A\u5927\u548C\u7B80\u5355\u6613\u7528\u4E24\u4E2A\u7279\u5F81\u3002Java \u8BED\u8A00\u4F5C\u4E3A\u9759\u6001\u9762\u5411\u5BF9\u8C61\u7F16\u7A0B\u8BED\u8A00\u7684\u4F18\u79C0\u4EE3\u8868\uFF0C\u6781\u597D\u5730\u5B9E\u73B0\u4E86\u9762\u5411\u5BF9\u8C61\u7406\u8BBA\uFF0C\u5141\u8BB8\u7A0B\u5E8F\u5458\u4EE5\u4F18\u96C5\u7684\u601D\u7EF4\u65B9\u5F0F\u8FDB\u884C\u590D\u6742\u7684\u7F16\u7A0B \u3002</p><h3 id="_2-java-\u8BED\u8A00\u6709\u54EA\u4E9B\u7279\u70B9" tabindex="-1"><a class="header-anchor" href="#_2-java-\u8BED\u8A00\u6709\u54EA\u4E9B\u7279\u70B9" aria-hidden="true">#</a> 2.Java \u8BED\u8A00\u6709\u54EA\u4E9B\u7279\u70B9\uFF1F</h3><p>Java \u8BED\u8A00\u6709\u5F88\u591A\u4F18\u79C0\uFF08\u53EF\u5439\uFF09\u7684\u7279\u70B9\uFF0C\u4EE5\u4E0B\u51E0\u4E2A\u662F\u6BD4\u8F83\u7A81\u51FA\u7684\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/javase-2.png" alt="Java\u8BED\u8A00\u7279\u70B9"></p><ul><li>\u9762\u5411\u5BF9\u8C61\uFF08\u5C01\u88C5\uFF0C\u7EE7\u627F\uFF0C\u591A\u6001\uFF09\uFF1B</li><li>\u5E73\u53F0\u65E0\u5173\u6027\uFF0C\u5E73\u53F0\u65E0\u5173\u6027\u7684\u5177\u4F53\u8868\u73B0\u5728\u4E8E\uFF0CJava \u662F\u201C\u4E00\u6B21\u7F16\u5199\uFF0C\u5230\u5904\u8FD0\u884C\uFF08Write Once\uFF0CRun any Where\uFF09\u201D\u7684\u8BED\u8A00\uFF0C\u56E0\u6B64\u91C7\u7528 Java \u8BED\u8A00\u7F16\u5199\u7684\u7A0B\u5E8F\u5177\u6709\u5F88\u597D\u7684\u53EF\u79FB\u690D\u6027\uFF0C\u800C\u4FDD\u8BC1\u8FD9\u4E00\u70B9\u7684\u6B63\u662F Java \u7684\u865A\u62DF\u673A\u673A\u5236\u3002\u5728\u5F15\u5165\u865A\u62DF\u673A\u4E4B\u540E\uFF0CJava \u8BED\u8A00\u5728\u4E0D\u540C\u7684\u5E73\u53F0\u4E0A\u8FD0\u884C\u4E0D\u9700\u8981\u91CD\u65B0\u7F16\u8BD1\u3002</li><li>\u652F\u6301\u591A\u7EBF\u7A0B\u3002C++ \u8BED\u8A00\u6CA1\u6709\u5185\u7F6E\u7684\u591A\u7EBF\u7A0B\u673A\u5236\uFF0C\u56E0\u6B64\u5FC5\u987B\u8C03\u7528\u64CD\u4F5C\u7CFB\u7EDF\u7684\u591A\u7EBF\u7A0B\u529F\u80FD\u6765\u8FDB\u884C\u591A\u7EBF\u7A0B\u7A0B\u5E8F\u8BBE\u8BA1\uFF0C\u800C Java \u8BED\u8A00\u5374\u63D0\u4F9B\u4E86\u591A\u7EBF\u7A0B\u652F\u6301\uFF1B</li><li>\u7F16\u8BD1\u4E0E\u89E3\u91CA\u5E76\u5B58\uFF1B</li></ul><h3 id="_3-jvm\u3001jdk-\u548C-jre-\u6709\u4EC0\u4E48\u533A\u522B" tabindex="-1"><a class="header-anchor" href="#_3-jvm\u3001jdk-\u548C-jre-\u6709\u4EC0\u4E48\u533A\u522B" aria-hidden="true">#</a> 3.JVM\u3001JDK \u548C JRE \u6709\u4EC0\u4E48\u533A\u522B\uFF1F</h3><p><strong>JVM</strong>\uFF1AJava Virtual Machine\uFF0CJava \u865A\u62DF\u673A\uFF0CJava \u7A0B\u5E8F\u8FD0\u884C\u5728 Java \u865A\u62DF\u673A\u4E0A\u3002\u9488\u5BF9\u4E0D\u540C\u7CFB\u7EDF\u7684\u5B9E\u73B0\uFF08Windows\uFF0CLinux\uFF0CmacOS\uFF09\u4E0D\u540C\u7684 JVM\uFF0C\u56E0\u6B64 Java \u8BED\u8A00\u53EF\u4EE5\u5B9E\u73B0\u8DE8\u5E73\u53F0\u3002</p><p><strong>JRE</strong>\uFF1A Java \u8FD0\u2F8F\u65F6\u73AF\u5883\u3002\u5B83\u662F\u8FD0\u2F8F\u5DF2\u7F16\u8BD1 Java \u7A0B\u5E8F\u6240\u9700\u7684\u6240\u6709\u5185\u5BB9\u7684\u96C6\u5408\uFF0C\u5305\u62EC Java \u865A\u62DF\u673A\uFF08JVM\uFF09\uFF0CJava \u7C7B\u5E93\uFF0CJava \u547D\u4EE4\u548C\u5176\u4ED6\u7684\u2F00\u4E9B\u57FA\u7840\u6784\u4EF6\u3002\u4F46\u662F\uFF0C\u5B83\u4E0D\u80FD\u2F64\u4E8E\u521B\u5EFA\u65B0\u7A0B\u5E8F\u3002</p><p><strong>JDK</strong>: Java Development Kit\uFF0C\u5B83\u662F\u529F\u80FD\u2EEC\u5168\u7684 Java SDK\u3002\u5B83\u62E5\u6709 JRE \u6240\u62E5\u6709\u7684\u2F00\u5207\uFF0C\u8FD8\u6709\u7F16\u8BD1\u5668\uFF08javac\uFF09\u548C\u2F2F\u5177\uFF08\u5982 javadoc \u548C jdb\uFF09\u3002\u5B83\u80FD\u591F\u521B\u5EFA\u548C\u7F16\u8BD1\u7A0B\u5E8F\u3002</p><p>\u7B80\u5355\u6765\u8BF4\uFF0CJDK \u5305\u542B JRE\uFF0CJRE \u5305\u542B JVM\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/javase-3.png" alt="JDK\u3001JRE\u3001JVM\u5173\u7CFB"></p><h3 id="_4-\u8BF4\u8BF4\u4EC0\u4E48\u662F\u8DE8\u5E73\u53F0\u6027-\u539F\u7406\u662F\u4EC0\u4E48" tabindex="-1"><a class="header-anchor" href="#_4-\u8BF4\u8BF4\u4EC0\u4E48\u662F\u8DE8\u5E73\u53F0\u6027-\u539F\u7406\u662F\u4EC0\u4E48" aria-hidden="true">#</a> 4.\u8BF4\u8BF4\u4EC0\u4E48\u662F\u8DE8\u5E73\u53F0\u6027\uFF1F\u539F\u7406\u662F\u4EC0\u4E48</h3><p>\u6240\u8C13\u8DE8\u5E73\u53F0\u6027\uFF0C\u662F\u6307 Java \u8BED\u8A00\u7F16\u5199\u7684\u7A0B\u5E8F\uFF0C\u4E00\u6B21\u7F16\u8BD1\u540E\uFF0C\u53EF\u4EE5\u5728\u591A\u4E2A\u7CFB\u7EDF\u5E73\u53F0\u4E0A\u8FD0\u884C\u3002</p><p>\u5B9E\u73B0\u539F\u7406\uFF1AJava \u7A0B\u5E8F\u662F\u901A\u8FC7 Java \u865A\u62DF\u673A\u5728\u7CFB\u7EDF\u5E73\u53F0\u4E0A\u8FD0\u884C\u7684\uFF0C\u53EA\u8981\u8BE5\u7CFB\u7EDF\u53EF\u4EE5\u5B89\u88C5\u76F8\u5E94\u7684 Java \u865A\u62DF\u673A\uFF0C\u8BE5\u7CFB\u7EDF\u5C31\u53EF\u4EE5\u8FD0\u884C java \u7A0B\u5E8F\u3002</p><h3 id="_5-\u4EC0\u4E48\u662F\u5B57\u8282\u7801-\u91C7\u7528\u5B57\u8282\u7801\u7684\u597D\u5904\u662F\u4EC0\u4E48" tabindex="-1"><a class="header-anchor" href="#_5-\u4EC0\u4E48\u662F\u5B57\u8282\u7801-\u91C7\u7528\u5B57\u8282\u7801\u7684\u597D\u5904\u662F\u4EC0\u4E48" aria-hidden="true">#</a> 5.\u4EC0\u4E48\u662F\u5B57\u8282\u7801\uFF1F\u91C7\u7528\u5B57\u8282\u7801\u7684\u597D\u5904\u662F\u4EC0\u4E48?</h3><p>\u6240\u8C13\u7684\u5B57\u8282\u7801\uFF0C\u5C31\u662F Java \u7A0B\u5E8F\u7ECF\u8FC7\u7F16\u8BD1\u4E4B\u7C7B\u4EA7\u751F\u7684.class \u6587\u4EF6\uFF0C\u5B57\u8282\u7801\u80FD\u591F\u88AB\u865A\u62DF\u673A\u8BC6\u522B\uFF0C\u4ECE\u800C\u5B9E\u73B0 Java \u7A0B\u5E8F\u7684\u8DE8\u5E73\u53F0\u6027\u3002</p><p><strong>Java</strong> \u7A0B\u5E8F\u4ECE\u6E90\u4EE3\u7801\u5230\u8FD0\u884C\u4E3B\u8981\u6709\u4E09\u6B65\uFF1A</p><ul><li><strong>\u7F16\u8BD1</strong>\uFF1A\u5C06\u6211\u4EEC\u7684\u4EE3\u7801\uFF08.java\uFF09\u7F16\u8BD1\u6210\u865A\u62DF\u673A\u53EF\u4EE5\u8BC6\u522B\u7406\u89E3\u7684\u5B57\u8282\u7801(.class)</li><li><strong>\u89E3\u91CA</strong>\uFF1A\u865A\u62DF\u673A\u6267\u884C Java \u5B57\u8282\u7801\uFF0C\u5C06\u5B57\u8282\u7801\u7FFB\u8BD1\u6210\u673A\u5668\u80FD\u8BC6\u522B\u7684\u673A\u5668\u7801</li><li><strong>\u6267\u884C</strong>\uFF1A\u5BF9\u5E94\u7684\u673A\u5668\u6267\u884C\u4E8C\u8FDB\u5236\u673A\u5668\u7801</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/javase-4.png" alt="Java\u7A0B\u5E8F\u6267\u884C\u8FC7\u7A0B"></p><p>\u53EA\u9700\u8981\u628A Java \u7A0B\u5E8F\u7F16\u8BD1\u6210 Java \u865A\u62DF\u673A\u80FD\u8BC6\u522B\u7684 Java \u5B57\u8282\u7801\uFF0C\u4E0D\u540C\u7684\u5E73\u53F0\u5B89\u88C5\u5BF9\u5E94\u7684 Java \u865A\u62DF\u673A\uFF0C\u8FD9\u6837\u5C31\u53EF\u4EE5\u53EF\u4EE5\u5B9E\u73B0 Java \u8BED\u8A00\u7684\u5E73\u53F0\u65E0\u5173\u6027\u3002</p><h3 id="_6-\u4E3A\u4EC0\u4E48\u8BF4-java-\u8BED\u8A00-\u7F16\u8BD1\u4E0E\u89E3\u91CA\u5E76\u5B58" tabindex="-1"><a class="header-anchor" href="#_6-\u4E3A\u4EC0\u4E48\u8BF4-java-\u8BED\u8A00-\u7F16\u8BD1\u4E0E\u89E3\u91CA\u5E76\u5B58" aria-hidden="true">#</a> 6.\u4E3A\u4EC0\u4E48\u8BF4 Java \u8BED\u8A00\u201C\u7F16\u8BD1\u4E0E\u89E3\u91CA\u5E76\u5B58\u201D\uFF1F</h3><p>\u9AD8\u7EA7\u7F16\u7A0B\u8BED\u8A00\u6309\u7167\u7A0B\u5E8F\u7684\u6267\u884C\u65B9\u5F0F\u5206\u4E3A<strong>\u7F16\u8BD1\u578B</strong>\u548C<strong>\u89E3\u91CA\u578B</strong>\u4E24\u79CD\u3002</p><p>\u7B80\u5355\u6765\u8BF4\uFF0C\u7F16\u8BD1\u578B\u8BED\u8A00\u662F\u6307\u7F16\u8BD1\u5668\u9488\u5BF9\u7279\u5B9A\u7684\u64CD\u4F5C\u7CFB\u7EDF\u5C06\u6E90\u4EE3\u7801\u4E00\u6B21\u6027\u7FFB\u8BD1\u6210\u53EF\u88AB\u8BE5\u5E73\u53F0\u6267\u884C\u7684\u673A\u5668\u7801\uFF1B\u89E3\u91CA\u578B\u8BED\u8A00\u662F\u6307\u89E3\u91CA\u5668\u5BF9\u6E90\u7A0B\u5E8F\u9010\u884C\u89E3\u91CA\u6210\u7279\u5B9A\u5E73\u53F0\u7684\u673A\u5668\u7801\u5E76\u7ACB\u5373\u6267\u884C\u3002</p><p>\u6BD4\u5982\uFF0C\u4F60\u60F3\u8BFB\u4E00\u672C\u5916\u56FD\u7684\u5C0F\u8BF4\uFF0C\u4F60\u53EF\u4EE5\u627E\u4E00\u4E2A\u7FFB\u8BD1\u4EBA\u5458\u5E2E\u52A9\u4F60\u7FFB\u8BD1\uFF0C\u6709\u4E24\u79CD\u9009\u62E9\u65B9\u5F0F\uFF0C\u4F60\u53EF\u4EE5\u5148\u7B49\u7FFB\u8BD1\u4EBA\u5458\u5C06\u5168\u672C\u7684\u5C0F\u8BF4\uFF08\u4E5F\u5C31\u662F\u6E90\u7801\uFF09\u90FD\u7FFB\u8BD1\u6210\u6C49\u8BED\uFF0C\u518D\u53BB\u9605\u8BFB\uFF0C\u4E5F\u53EF\u4EE5\u8BA9\u7FFB\u8BD1\u4EBA\u5458\u7FFB\u8BD1\u4E00\u6BB5\uFF0C\u4F60\u5728\u65C1\u8FB9\u9605\u8BFB\u4E00\u6BB5\uFF0C\u6162\u6162\u628A\u4E66\u8BFB\u5B8C\u3002</p><p>Java \u8BED\u8A00\u65E2\u5177\u6709\u7F16\u8BD1\u578B\u8BED\u8A00\u7684\u7279\u5F81\uFF0C\u4E5F\u5177\u6709\u89E3\u91CA\u578B\u8BED\u8A00\u7684\u7279\u5F81\uFF0C\u56E0\u4E3A Java \u7A0B\u5E8F\u8981\u7ECF\u8FC7\u5148\u7F16\u8BD1\uFF0C\u540E\u89E3\u91CA\u4E24\u4E2A\u6B65\u9AA4\uFF0C\u7531 Java \u7F16\u5199\u7684\u7A0B\u5E8F\u9700\u8981\u5148\u7ECF\u8FC7\u7F16\u8BD1\u6B65\u9AA4\uFF0C\u751F\u6210\u5B57\u8282\u7801\uFF08<code>\\*.class</code> \u6587\u4EF6\uFF09\uFF0C\u8FD9\u79CD\u5B57\u8282\u7801\u5FC5\u987B\u518D\u7ECF\u8FC7 JVM\uFF0C\u89E3\u91CA\u6210\u64CD\u4F5C\u7CFB\u7EDF\u80FD\u8BC6\u522B\u7684\u673A\u5668\u7801\uFF0C\u5728\u7531\u64CD\u4F5C\u7CFB\u7EDF\u6267\u884C\u3002\u56E0\u6B64\uFF0C\u6211\u4EEC\u53EF\u4EE5\u8BA4\u4E3A Java \u8BED\u8A00<strong>\u7F16\u8BD1</strong>\u4E0E<strong>\u89E3\u91CA</strong>\u5E76\u5B58\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/javase-5.png" alt="\u7F16\u8BD1\u4E0E\u89E3\u91CA"></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><h2 id="\u57FA\u7840\u8BED\u6CD5" tabindex="-1"><a class="header-anchor" href="#\u57FA\u7840\u8BED\u6CD5" aria-hidden="true">#</a> \u57FA\u7840\u8BED\u6CD5</h2><h3 id="_7-java-\u6709\u54EA\u4E9B\u6570\u636E\u7C7B\u578B" tabindex="-1"><a class="header-anchor" href="#_7-java-\u6709\u54EA\u4E9B\u6570\u636E\u7C7B\u578B" aria-hidden="true">#</a> 7.Java \u6709\u54EA\u4E9B\u6570\u636E\u7C7B\u578B\uFF1F</h3><p><b>\u5B9A\u4E49\uFF1A</b>Java \u8BED\u8A00\u662F\u5F3A\u7C7B\u578B\u8BED\u8A00\uFF0C\u5BF9\u4E8E\u6BCF\u4E00\u79CD\u6570\u636E\u90FD\u5B9A\u4E49\u4E86\u660E\u786E\u7684\u5177\u4F53\u7684\u6570\u636E\u7C7B\u578B\uFF0C\u5728\u5185\u5B58\u4E2D\u5206\u914D\u4E86\u4E0D\u540C\u5927\u5C0F\u7684\u5185\u5B58\u7A7A\u95F4\u3002</p><p>Java \u8BED\u8A00\u6570\u636E\u7C7B\u578B\u5206\u4E3A\u4E24\u79CD\uFF1A<strong>\u57FA\u672C\u6570\u636E\u7C7B\u578B</strong>\u548C<strong>\u5F15\u7528\u6570\u636E\u7C7B\u578B</strong>\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/javase-6.png" alt="Java\u6570\u636E\u7C7B\u578B"></p><p><b>\u57FA\u672C\u6570\u636E\u7C7B\u578B\uFF1A</b></p><ul><li>\u6570\u503C\u578B <ul><li>\u6574\u6570\u7C7B\u578B\uFF08byte\u3001short\u3001int\u3001long\uFF09</li><li>\u6D6E\u70B9\u7C7B\u578B\uFF08float\u3001double\uFF09</li></ul></li><li>\u5B57\u7B26\u578B\uFF08char\uFF09</li><li>\u5E03\u5C14\u578B\uFF08boolean\uFF09</li></ul><p>Java \u57FA\u672C\u6570\u636E\u7C7B\u578B\u8303\u56F4\u548C\u9ED8\u8BA4\u503C\uFF1A</p><table><thead><tr><th>\u57FA\u672C\u7C7B\u578B</th><th>\u4F4D\u6570</th><th>\u5B57\u8282</th><th>\u9ED8\u8BA4\u503C</th></tr></thead><tbody><tr><td><code>int</code></td><td>32</td><td>4</td><td>0</td></tr><tr><td><code>short</code></td><td>16</td><td>2</td><td>0</td></tr><tr><td><code>long</code></td><td>64</td><td>8</td><td>0L</td></tr><tr><td><code>byte</code></td><td>8</td><td>1</td><td>0</td></tr><tr><td><code>char</code></td><td>16</td><td>2</td><td>&#39;u0000&#39;</td></tr><tr><td><code>float</code></td><td>32</td><td>4</td><td>0f</td></tr><tr><td><code>double</code></td><td>64</td><td>8</td><td>0d</td></tr><tr><td><code>boolean</code></td><td>1</td><td></td><td>false</td></tr></tbody></table><p><strong>\u5F15\u7528\u6570\u636E\u7C7B\u578B\uFF1A</strong></p><ul><li>\u7C7B\uFF08class\uFF09</li><li>\u63A5\u53E3\uFF08interface\uFF09</li><li>\u6570\u7EC4([])</li></ul><h3 id="_8-\u81EA\u52A8\u7C7B\u578B\u8F6C\u6362\u3001\u5F3A\u5236\u7C7B\u578B\u8F6C\u6362-\u770B\u770B\u8FD9\u51E0\u884C\u4EE3\u7801" tabindex="-1"><a class="header-anchor" href="#_8-\u81EA\u52A8\u7C7B\u578B\u8F6C\u6362\u3001\u5F3A\u5236\u7C7B\u578B\u8F6C\u6362-\u770B\u770B\u8FD9\u51E0\u884C\u4EE3\u7801" aria-hidden="true">#</a> 8.\u81EA\u52A8\u7C7B\u578B\u8F6C\u6362\u3001\u5F3A\u5236\u7C7B\u578B\u8F6C\u6362\uFF1F\u770B\u770B\u8FD9\u51E0\u884C\u4EE3\u7801\uFF1F</h3><p>Java \u6240\u6709\u7684\u6570\u503C\u578B\u53D8\u91CF\u53EF\u4EE5\u76F8\u4E92\u8F6C\u6362\uFF0C\u5F53\u628A\u4E00\u4E2A\u8868\u6570\u8303\u56F4\u5C0F\u7684\u6570\u503C\u6216\u53D8\u91CF\u76F4\u63A5\u8D4B\u7ED9\u53E6\u4E00\u4E2A\u8868\u6570\u8303\u56F4\u5927\u7684\u53D8\u91CF\u65F6\uFF0C\u53EF\u4EE5\u8FDB\u884C\u81EA\u52A8\u7C7B\u578B\u8F6C\u6362\uFF1B\u53CD\u4E4B\uFF0C\u9700\u8981\u5F3A\u5236\u8F6C\u6362\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/javase-7.png" alt="Java\u81EA\u52A8\u7C7B\u578B\u8F6C\u6362\u65B9\u5411"></p><p>\u8FD9\u5C31\u597D\u50CF\uFF0C\u5C0F\u676F\u91CC\u7684\u6C34\u5012\u8FDB\u5927\u676F\u6CA1\u95EE\u9898\uFF0C\u4F46\u5927\u676F\u7684\u6C34\u5012\u8FDB\u5C0F\u676F\u5C31\u4E0D\u884C\u4E86\uFF0C\u53EF\u80FD\u4F1A\u6EA2\u51FA\u3002</p><blockquote><p><code>float f=3.4</code>\uFF0C\u5BF9\u5417\uFF1F</p></blockquote><p>\u4E0D\u6B63\u786E\u30023.4 \u662F\u5355\u7CBE\u5EA6\u6570\uFF0C\u5C06\u53CC\u7CBE\u5EA6\u578B\uFF08double\uFF09\u8D4B\u503C\u7ED9\u6D6E\u70B9\u578B\uFF08float\uFF09\u5C5E\u4E8E\u4E0B\u8F6C\u578B\uFF08down-casting\uFF0C\u4E5F\u79F0\u4E3A\u7A84\u5316\uFF09\u4F1A\u9020\u6210\u7CBE\u5EA6\u635F\u5931\uFF0C\u56E0\u6B64\u9700\u8981\u5F3A\u5236\u7C7B\u578B\u8F6C\u6362<code>float f =(float)3.4;</code>\u6216\u8005\u5199\u6210<code>float f =3.4F</code></p><blockquote><p><code>short s1 = 1; s1 = s1 + 1\uFF1B</code>\u5BF9\u5417\uFF1F<code>short s1 = 1; s1 += 1;</code>\u5BF9\u5417\uFF1F</p></blockquote><p>\u5BF9\u4E8E short s1 = 1; s1 = s1 + 1;\u7F16\u8BD1\u51FA\u9519\uFF0C\u7531\u4E8E 1 \u662F int \u7C7B\u578B\uFF0C\u56E0\u6B64 s1+1 \u8FD0\u7B97\u7ED3\u679C\u4E5F\u662F int \u578B\uFF0C\u9700\u8981\u5F3A\u5236\u8F6C\u6362\u7C7B\u578B\u624D\u80FD\u8D4B\u503C\u7ED9 short \u578B\u3002</p><p>\u800C short s1 = 1; s1 += 1;\u53EF\u4EE5\u6B63\u786E\u7F16\u8BD1\uFF0C\u56E0\u4E3A s1+= 1;\u76F8\u5F53\u4E8E s1 = (short(s1 + 1);\u5176\u4E2D\u6709\u9690\u542B\u7684\u5F3A\u5236\u7C7B\u578B\u8F6C\u6362\u3002</p><h3 id="_9-\u4EC0\u4E48\u662F\u81EA\u52A8\u62C6\u7BB1-\u5C01\u7BB1" tabindex="-1"><a class="header-anchor" href="#_9-\u4EC0\u4E48\u662F\u81EA\u52A8\u62C6\u7BB1-\u5C01\u7BB1" aria-hidden="true">#</a> 9.\u4EC0\u4E48\u662F\u81EA\u52A8\u62C6\u7BB1/\u5C01\u7BB1\uFF1F</h3><ul><li><strong>\u88C5\u7BB1</strong>\uFF1A\u5C06\u57FA\u672C\u7C7B\u578B\u7528\u5B83\u4EEC\u5BF9\u5E94\u7684\u5F15\u7528\u7C7B\u578B\u5305\u88C5\u8D77\u6765\uFF1B</li><li><strong>\u62C6\u7BB1</strong>\uFF1A\u5C06\u5305\u88C5\u7C7B\u578B\u8F6C\u6362\u4E3A\u57FA\u672C\u6570\u636E\u7C7B\u578B\uFF1B</li></ul><p>Java \u53EF\u4EE5\u81EA\u52A8\u5BF9\u57FA\u672C\u6570\u636E\u7C7B\u578B\u548C\u5B83\u4EEC\u7684\u5305\u88C5\u7C7B\u8FDB\u884C\u88C5\u7BB1\u548C\u62C6\u7BB1\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/javase-8.png" alt="\u88C5\u7BB1\u548C\u62C6\u7BB1"></p><p>\u4E3E\u4F8B\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">Integer</span> i <span class="token operator">=</span> <span class="token number">10</span><span class="token punctuation">;</span>  <span class="token comment">//\u88C5\u7BB1</span>
 <span class="token keyword">int</span> n <span class="token operator">=</span> i<span class="token punctuation">;</span>   <span class="token comment">//\u62C6\u7BB1</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="_10-\u548C-\u6709\u4EC0\u4E48\u533A\u522B" tabindex="-1"><a class="header-anchor" href="#_10-\u548C-\u6709\u4EC0\u4E48\u533A\u522B" aria-hidden="true">#</a> 10.&amp;\u548C&amp;&amp;\u6709\u4EC0\u4E48\u533A\u522B\uFF1F</h3><p>&amp;\u8FD0\u7B97\u7B26\u6709\u4E24\u79CD\u7528\u6CD5\uFF1A<code>\u77ED\u8DEF\u4E0E</code>\u3001<code>\u903B\u8F91\u4E0E</code>\u3002</p><p>&amp;&amp;\u8FD0\u7B97\u7B26\u662F\u77ED\u8DEF\u4E0E\u8FD0\u7B97\u3002\u903B\u8F91\u4E0E\u8DDF\u77ED\u8DEF\u4E0E\u7684\u5DEE\u522B\u662F\u975E\u5E38\u5DE8\u5927\u7684\uFF0C\u867D\u7136\u4E8C\u8005\u90FD\u8981\u6C42\u8FD0\u7B97\u7B26\u5DE6\u53F3\u4E24\u7AEF\u7684\u5E03\u5C14\u503C\u90FD\u662F true \u6574\u4E2A\u8868\u8FBE\u5F0F\u7684\u503C\u624D\u662F true\u3002</p><p>&amp;&amp;\u4E4B\u6240\u4EE5\u79F0\u4E3A\u77ED\u8DEF\u8FD0\u7B97\u662F\u56E0\u4E3A\uFF0C\u5982\u679C&amp;&amp;\u5DE6\u8FB9\u7684\u8868\u8FBE\u5F0F\u7684\u503C\u662F false\uFF0C\u53F3\u8FB9\u7684\u8868\u8FBE\u5F0F\u4F1A\u88AB\u76F4\u63A5\u77ED\u8DEF\u6389\uFF0C\u4E0D\u4F1A\u8FDB\u884C\u8FD0\u7B97\u3002\u5F88\u591A\u65F6\u5019\u6211\u4EEC\u53EF\u80FD\u90FD\u9700\u8981\u7528&amp;&amp;\u800C\u4E0D\u662F&amp;\u3002</p><p>\u4F8B\u5982\u5728\u9A8C\u8BC1\u7528\u6237\u767B\u5F55\u65F6\u5224\u5B9A\u7528\u6237\u540D\u4E0D\u662F null \u800C\u4E14\u4E0D\u662F\u7A7A\u5B57\u7B26\u4E32\uFF0C\u5E94\u5F53\u5199\u4E3A<code>username != null &amp;&amp;!username.equals(&quot;&quot;)</code>\uFF0C\u4E8C\u8005\u7684\u987A\u5E8F\u4E0D\u80FD\u4EA4\u6362\uFF0C\u66F4\u4E0D\u80FD\u7528&amp;\u8FD0\u7B97\u7B26\uFF0C\u56E0\u4E3A\u7B2C\u4E00\u4E2A\u6761\u4EF6\u5982\u679C\u4E0D\u6210\u7ACB\uFF0C\u6839\u672C\u4E0D\u80FD\u8FDB\u884C\u5B57\u7B26\u4E32\u7684 equals \u6BD4\u8F83\uFF0C\u5426\u5219\u4F1A\u4EA7\u751F NullPointerException \u5F02\u5E38\u3002</p><p><strong>\u6CE8\u610F</strong>\uFF1A\u903B\u8F91\u6216\u8FD0\u7B97\u7B26\uFF08|\uFF09\u548C\u77ED\u8DEF\u6216\u8FD0\u7B97\u7B26\uFF08||\uFF09\u7684\u5DEE\u522B\u4E5F\u662F\u5982\u6B64\u3002</p><h3 id="_11-switch-\u662F\u5426\u80FD\u4F5C\u7528\u5728-byte-long-string-\u4E0A" tabindex="-1"><a class="header-anchor" href="#_11-switch-\u662F\u5426\u80FD\u4F5C\u7528\u5728-byte-long-string-\u4E0A" aria-hidden="true">#</a> 11.switch \u662F\u5426\u80FD\u4F5C\u7528\u5728 byte/long/String \u4E0A\uFF1F</h3><p>Java5 \u4EE5\u524D switch(expr)\u4E2D\uFF0Cexpr \u53EA\u80FD\u662F byte\u3001short\u3001char\u3001int\u3002</p><p>\u4ECE Java 5 \u5F00\u59CB\uFF0CJava \u4E2D\u5F15\u5165\u4E86\u679A\u4E3E\u7C7B\u578B\uFF0C expr \u4E5F\u53EF\u4EE5\u662F enum \u7C7B\u578B\u3002</p><p>\u4ECE Java 7 \u5F00\u59CB\uFF0Cexpr \u8FD8\u53EF\u4EE5\u662F\u5B57\u7B26\u4E32(String)\uFF0C\u4F46\u662F\u957F\u6574\u578B(long)\u5728\u76EE\u524D\u6240\u6709\u7684\u7248\u672C\u4E2D\u90FD\u662F\u4E0D\u53EF\u4EE5\u7684\u3002</p><h3 id="_12-break-continue-return-\u7684\u533A\u522B\u53CA\u4F5C\u7528" tabindex="-1"><a class="header-anchor" href="#_12-break-continue-return-\u7684\u533A\u522B\u53CA\u4F5C\u7528" aria-hidden="true">#</a> 12.break ,continue ,return \u7684\u533A\u522B\u53CA\u4F5C\u7528\uFF1F</h3><ul><li>break \u8DF3\u51FA\u6574\u4E2A\u5FAA\u73AF\uFF0C\u4E0D\u518D\u6267\u884C\u5FAA\u73AF(<strong>\u7ED3\u675F\u5F53\u524D\u7684\u5FAA\u73AF\u4F53</strong>)</li><li>continue \u8DF3\u51FA\u672C\u6B21\u5FAA\u73AF\uFF0C\u7EE7\u7EED\u6267\u884C\u4E0B\u6B21\u5FAA\u73AF(<strong>\u7ED3\u675F\u6B63\u5728\u6267\u884C\u7684\u5FAA\u73AF \u8FDB\u5165\u4E0B\u4E00\u4E2A\u5FAA\u73AF\u6761\u4EF6</strong>)</li><li>return \u7A0B\u5E8F\u8FD4\u56DE\uFF0C\u4E0D\u518D\u6267\u884C\u4E0B\u9762\u7684\u4EE3\u7801(<strong>\u7ED3\u675F\u5F53\u524D\u7684\u65B9\u6CD5 \u76F4\u63A5\u8FD4\u56DE</strong>)</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/javase-9.png" alt="break \u3001continue \u3001return"></p><h3 id="_13-\u7528\u6700\u6709\u6548\u7387\u7684\u65B9\u6CD5\u8BA1\u7B97-2-\u4E58\u4EE5-8" tabindex="-1"><a class="header-anchor" href="#_13-\u7528\u6700\u6709\u6548\u7387\u7684\u65B9\u6CD5\u8BA1\u7B97-2-\u4E58\u4EE5-8" aria-hidden="true">#</a> 13.\u7528\u6700\u6709\u6548\u7387\u7684\u65B9\u6CD5\u8BA1\u7B97 2 \u4E58\u4EE5 8\uFF1F</h3><p>2 &lt;&lt; 3\u3002<strong>\u4F4D\u8FD0\u7B97</strong>\uFF0C\u6570\u5B57\u7684\u4E8C\u8FDB\u5236\u4F4D\u5DE6\u79FB\u4E09\u4F4D\u76F8\u5F53\u4E8E\u4E58\u4EE5 2 \u7684\u4E09\u6B21\u65B9\u3002</p><h3 id="_14-\u8BF4\u8BF4\u81EA\u589E\u81EA\u51CF\u8FD0\u7B97-\u770B\u4E0B\u8FD9\u51E0\u4E2A\u4EE3\u7801\u8FD0\u884C\u7ED3\u679C" tabindex="-1"><a class="header-anchor" href="#_14-\u8BF4\u8BF4\u81EA\u589E\u81EA\u51CF\u8FD0\u7B97-\u770B\u4E0B\u8FD9\u51E0\u4E2A\u4EE3\u7801\u8FD0\u884C\u7ED3\u679C" aria-hidden="true">#</a> 14.\u8BF4\u8BF4\u81EA\u589E\u81EA\u51CF\u8FD0\u7B97\uFF1F\u770B\u4E0B\u8FD9\u51E0\u4E2A\u4EE3\u7801\u8FD0\u884C\u7ED3\u679C\uFF1F</h3><p>\u5728\u5199\u4EE3\u7801\u7684\u8FC7\u7A0B\u4E2D\uFF0C\u5E38\u89C1\u7684\u4E00\u79CD\u60C5\u51B5\u662F\u9700\u8981\u67D0\u4E2A\u6574\u6570\u7C7B\u578B\u53D8\u91CF\u589E\u52A0 1 \u6216\u51CF\u5C11 1\uFF0CJava \u63D0\u4F9B\u4E86\u4E00\u79CD\u7279\u6B8A\u7684\u8FD0\u7B97\u7B26\uFF0C\u7528\u4E8E\u8FD9\u79CD\u8868\u8FBE\u5F0F\uFF0C\u53EB\u505A\u81EA\u589E\u8FD0\u7B97\u7B26\uFF08++)\u548C\u81EA\u51CF\u8FD0\u7B97\u7B26\uFF08--\uFF09\u3002</p><p>++\u548C--\u8FD0\u7B97\u7B26\u53EF\u4EE5\u653E\u5728\u53D8\u91CF\u4E4B\u524D\uFF0C\u4E5F\u53EF\u4EE5\u653E\u5728\u53D8\u91CF\u4E4B\u540E\u3002</p><p>\u5F53\u8FD0\u7B97\u7B26\u653E\u5728\u53D8\u91CF\u4E4B\u524D\u65F6(\u524D\u7F00)\uFF0C\u5148\u81EA\u589E/\u51CF\uFF0C\u518D\u8D4B\u503C\uFF1B\u5F53\u8FD0\u7B97\u7B26\u653E\u5728\u53D8\u91CF\u4E4B\u540E\u65F6(\u540E\u7F00)\uFF0C\u5148\u8D4B\u503C\uFF0C\u518D\u81EA\u589E/\u51CF\u3002</p><p>\u4F8B\u5982\uFF0C\u5F53 <code>b = ++a</code> \u65F6\uFF0C\u5148\u81EA\u589E\uFF08\u81EA\u5DF1\u589E\u52A0 1\uFF09\uFF0C\u518D\u8D4B\u503C\uFF08\u8D4B\u503C\u7ED9 b\uFF09\uFF1B\u5F53 <code>b = a++</code> \u65F6\uFF0C\u5148\u8D4B\u503C(\u8D4B\u503C\u7ED9 b)\uFF0C\u518D\u81EA\u589E\uFF08\u81EA\u5DF1\u589E\u52A0 1\uFF09\u3002\u4E5F\u5C31\u662F\uFF0C++a \u8F93\u51FA\u7684\u662F a+1 \u7684\u503C\uFF0Ca++\u8F93\u51FA\u7684\u662F a \u503C\u3002</p><p>\u7528\u4E00\u53E5\u53E3\u8BC0\u5C31\u662F\uFF1A\u201C\u7B26\u53F7\u5728\u524D\u5C31\u5148\u52A0/\u51CF\uFF0C\u7B26\u53F7\u5728\u540E\u5C31\u540E\u52A0/\u51CF\u201D\u3002</p><blockquote><p>\u770B\u4E00\u4E0B\u8FD9\u6BB5\u4EE3\u7801\u8FD0\u884C\u7ED3\u679C\uFF1F</p></blockquote><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">int</span> i  <span class="token operator">=</span> <span class="token number">1</span><span class="token punctuation">;</span>
 i <span class="token operator">=</span> i<span class="token operator">++</span><span class="token punctuation">;</span>
diff --git a/dist/assets/javathread.html.7f11e6a6.js b/dist/assets/javathread.html.9fc70ce0.js
similarity index 99%
rename from dist/assets/javathread.html.7f11e6a6.js
rename to dist/assets/javathread.html.9fc70ce0.js
index 3c679392..bf17ccd2 100644
--- a/dist/assets/javathread.html.7f11e6a6.js
+++ b/dist/assets/javathread.html.9fc70ce0.js
@@ -1,4 +1,4 @@
-import{_ as p}from"./plugin-vue_export-helper.21dcd24c.js";import{r as o,o as c,c as l,a,b as e,d as n,e as t}from"./app.a0271b9c.js";const i={},r=a("h1",{id:"\u9762\u6E23\u9006\u88AD-java-\u5E76\u53D1\u7F16\u7A0B\u7BC7-\u5FC5\u770B",tabindex:"-1"},[a("a",{class:"header-anchor",href:"#\u9762\u6E23\u9006\u88AD-java-\u5E76\u53D1\u7F16\u7A0B\u7BC7-\u5FC5\u770B","aria-hidden":"true"},"#"),n(" \u9762\u6E23\u9006\u88AD\uFF08Java \u5E76\u53D1\u7F16\u7A0B\u7BC7\uFF09\u5FC5\u770B\u{1F44D}")],-1),u=n("\u56FE\u6587\u8BE6\u89E3 60 \u9053Java\u5E76\u53D1\u9762\u8BD5\u9AD8\u9891\u9898\uFF0C\u8FD9\u6B21\u9762\u8BD5\uFF0C\u4E00\u5B9A\u540A\u6253\u9762\u8BD5\u5B98\uFF0C\u6574\u7406\uFF1A\u6C89\u9ED8\u738B\u4E8C\uFF0C\u6233"),d={href:"https://mp.weixin.qq.com/s/bImCIoYsH_JEzTkBx2lj4A",target:"_blank",rel:"noopener noreferrer"},k=n("\u8F6C\u8F7D\u94FE\u63A5"),v=n("\uFF0C\u4F5C\u8005\uFF1A\u4E09\u5206\u6076\uFF0C\u6233"),m={href:"https://mp.weixin.qq.com/s/1jhBZrAb7bnvkgN1TgAUpw",target:"_blank",rel:"noopener noreferrer"},h=n("\u539F\u6587\u94FE\u63A5"),b=n("\u3002"),g=t(`<h2 id="\u57FA\u7840" tabindex="-1"><a class="header-anchor" href="#\u57FA\u7840" aria-hidden="true">#</a> \u57FA\u7840</h2><h3 id="_1-\u5E76\u884C\u8DDF\u5E76\u53D1\u6709\u4EC0\u4E48\u533A\u522B" tabindex="-1"><a class="header-anchor" href="#_1-\u5E76\u884C\u8DDF\u5E76\u53D1\u6709\u4EC0\u4E48\u533A\u522B" aria-hidden="true">#</a> 1.\u5E76\u884C\u8DDF\u5E76\u53D1\u6709\u4EC0\u4E48\u533A\u522B\uFF1F</h3><p>\u4ECE\u64CD\u4F5C\u7CFB\u7EDF\u7684\u89D2\u5EA6\u6765\u770B\uFF0C\u7EBF\u7A0B\u662FCPU\u5206\u914D\u7684\u6700\u5C0F\u5355\u4F4D\u3002</p><ul><li>\u5E76\u884C\u5C31\u662F\u540C\u4E00\u65F6\u523B\uFF0C\u4E24\u4E2A\u7EBF\u7A0B\u90FD\u5728\u6267\u884C\u3002\u8FD9\u5C31\u8981\u6C42\u6709\u4E24\u4E2ACPU\u53BB\u5206\u522B\u6267\u884C\u4E24\u4E2A\u7EBF\u7A0B\u3002</li><li>\u5E76\u53D1\u5C31\u662F\u540C\u4E00\u65F6\u523B\uFF0C\u53EA\u6709\u4E00\u4E2A\u6267\u884C\uFF0C\u4F46\u662F\u4E00\u4E2A\u65F6\u95F4\u6BB5\u5185\uFF0C\u4E24\u4E2A\u7EBF\u7A0B\u90FD\u6267\u884C\u4E86\u3002\u5E76\u53D1\u7684\u5B9E\u73B0\u4F9D\u8D56\u4E8ECPU\u5207\u6362\u7EBF\u7A0B\uFF0C\u56E0\u4E3A\u5207\u6362\u7684\u65F6\u95F4\u7279\u522B\u77ED\uFF0C\u6240\u4EE5\u57FA\u672C\u5BF9\u4E8E\u7528\u6237\u662F\u65E0\u611F\u77E5\u7684\u3002</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/javathread-1.png" alt="\u5E76\u884C\u548C\u5E76\u53D1"></p><p>\u5C31\u597D\u50CF\u6211\u4EEC\u53BB\u98DF\u5802\u6253\u996D\uFF0C\u5E76\u884C\u5C31\u662F\u6211\u4EEC\u5728\u591A\u4E2A\u7A97\u53E3\u6392\u961F\uFF0C\u51E0\u4E2A\u963F\u59E8\u540C\u65F6\u6253\u83DC\uFF1B\u5E76\u53D1\u5C31\u662F\u6211\u4EEC\u6324\u5728\u4E00\u4E2A\u7A97\u53E3\uFF0C\u963F\u59E8\u7ED9\u8FD9\u4E2A\u6253\u4E00\u52FA\uFF0C\u53C8\u624B\u5FD9\u811A\u4E71\u5730\u7ED9\u90A3\u4E2A\u6253\u4E00\u52FA\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/javathread-2.png" alt="\u5E76\u884C\u5E76\u53D1\u548C\u98DF\u5802\u6253\u996D"></p><h3 id="_2-\u8BF4\u8BF4\u4EC0\u4E48\u662F\u8FDB\u7A0B\u548C\u7EBF\u7A0B" tabindex="-1"><a class="header-anchor" href="#_2-\u8BF4\u8BF4\u4EC0\u4E48\u662F\u8FDB\u7A0B\u548C\u7EBF\u7A0B" aria-hidden="true">#</a> 2.\u8BF4\u8BF4\u4EC0\u4E48\u662F\u8FDB\u7A0B\u548C\u7EBF\u7A0B\uFF1F</h3><p>\u8981\u8BF4\u7EBF\u7A0B\uFF0C\u5FC5\u987B\u5F97\u5148\u8BF4\u8BF4\u8FDB\u7A0B\u3002</p><ul><li>\u8FDB\u7A0B\uFF1A\u8FDB\u7A0B\u662F\u4EE3\u7801\u5728\u6570\u636E\u96C6\u5408\u4E0A\u7684\u4E00\u6B21\u8FD0\u884C\u6D3B\u52A8\uFF0C\u662F\u7CFB\u7EDF\u8FDB\u884C\u8D44\u6E90\u5206\u914D\u548C\u8C03\u5EA6\u7684\u57FA\u672C\u5355\u4F4D\u3002</li><li>\u7EBF\u7A0B\uFF1A\u7EBF\u7A0B\u662F\u8FDB\u7A0B\u7684\u4E00\u4E2A\u6267\u884C\u8DEF\u5F84\uFF0C\u4E00\u4E2A\u8FDB\u7A0B\u4E2D\u81F3\u5C11\u6709\u4E00\u4E2A\u7EBF\u7A0B\uFF0C\u8FDB\u7A0B\u4E2D\u7684\u591A\u4E2A\u7EBF\u7A0B\u5171\u4EAB\u8FDB\u7A0B\u7684\u8D44\u6E90\u3002</li></ul><p>\u64CD\u4F5C\u7CFB\u7EDF\u5728\u5206\u914D\u8D44\u6E90\u65F6\u662F\u628A\u8D44\u6E90\u5206\u914D\u7ED9\u8FDB\u7A0B\u7684\uFF0C \u4F46\u662F CPU \u8D44\u6E90\u6BD4\u8F83\u7279\u6B8A\uFF0C\u5B83\u662F\u88AB\u5206\u914D\u5230\u7EBF\u7A0B\u7684\uFF0C\u56E0\u4E3A\u771F\u6B63\u8981\u5360\u7528CPU\u8FD0\u884C\u7684\u662F\u7EBF\u7A0B\uFF0C\u6240\u4EE5\u4E5F\u8BF4\u7EBF\u7A0B\u662F CPU\u5206\u914D\u7684\u57FA\u672C\u5355\u4F4D\u3002</p><p>\u6BD4\u5982\u5728Java\u4E2D\uFF0C\u5F53\u6211\u4EEC\u542F\u52A8 main \u51FD\u6570\u5176\u5B9E\u5C31\u542F\u52A8\u4E86\u4E00\u4E2AJVM\u8FDB\u7A0B\uFF0C\u800C main \u51FD\u6570\u5728\u7684\u7EBF\u7A0B\u5C31\u662F\u8FD9\u4E2A\u8FDB\u7A0B\u4E2D\u7684\u4E00\u4E2A\u7EBF\u7A0B\uFF0C\u4E5F\u79F0\u4E3B\u7EBF\u7A0B\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/javathread-3.png" alt="\u7A0B\u5E8F\u8FDB\u7A0B\u7EBF\u7A0B\u5173\u7CFB"></p><p>\u4E00\u4E2A\u8FDB\u7A0B\u4E2D\u6709\u591A\u4E2A\u7EBF\u7A0B\uFF0C\u591A\u4E2A\u7EBF\u7A0B\u5171\u7528\u8FDB\u7A0B\u7684\u5806\u548C\u65B9\u6CD5\u533A\u8D44\u6E90\uFF0C\u4F46\u662F\u6BCF\u4E2A\u7EBF\u7A0B\u6709\u81EA\u5DF1\u7684\u7A0B\u5E8F\u8BA1\u6570\u5668\u548C\u6808\u3002</p><h3 id="_3-\u8BF4\u8BF4\u7EBF\u7A0B\u6709\u51E0\u79CD\u521B\u5EFA\u65B9\u5F0F" tabindex="-1"><a class="header-anchor" href="#_3-\u8BF4\u8BF4\u7EBF\u7A0B\u6709\u51E0\u79CD\u521B\u5EFA\u65B9\u5F0F" aria-hidden="true">#</a> 3.\u8BF4\u8BF4\u7EBF\u7A0B\u6709\u51E0\u79CD\u521B\u5EFA\u65B9\u5F0F\uFF1F</h3><p>Java\u4E2D\u521B\u5EFA\u7EBF\u7A0B\u4E3B\u8981\u6709\u4E09\u79CD\u65B9\u5F0F\uFF0C\u5206\u522B\u4E3A\u7EE7\u627FThread\u7C7B\u3001\u5B9E\u73B0Runnable\u63A5\u53E3\u3001\u5B9E\u73B0Callable\u63A5\u53E3\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/javathread-4.png" alt="\u7EBF\u7A0B\u521B\u5EFA\u4E09\u79CD\u65B9\u5F0F"></p><ul><li>\u7EE7\u627FThread\u7C7B\uFF0C\u91CD\u5199run()\u65B9\u6CD5\uFF0C\u8C03\u7528start()\u65B9\u6CD5\u542F\u52A8\u7EBF\u7A0B</li></ul><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">ThreadTest</span> <span class="token punctuation">{</span>
+import{_ as p}from"./plugin-vue_export-helper.21dcd24c.js";import{r as o,o as c,c as l,a,b as e,d as n,e as t}from"./app.615e41d8.js";const i={},r=a("h1",{id:"\u9762\u6E23\u9006\u88AD-java-\u5E76\u53D1\u7F16\u7A0B\u7BC7-\u5FC5\u770B",tabindex:"-1"},[a("a",{class:"header-anchor",href:"#\u9762\u6E23\u9006\u88AD-java-\u5E76\u53D1\u7F16\u7A0B\u7BC7-\u5FC5\u770B","aria-hidden":"true"},"#"),n(" \u9762\u6E23\u9006\u88AD\uFF08Java \u5E76\u53D1\u7F16\u7A0B\u7BC7\uFF09\u5FC5\u770B\u{1F44D}")],-1),u=n("\u56FE\u6587\u8BE6\u89E3 60 \u9053Java\u5E76\u53D1\u9762\u8BD5\u9AD8\u9891\u9898\uFF0C\u8FD9\u6B21\u9762\u8BD5\uFF0C\u4E00\u5B9A\u540A\u6253\u9762\u8BD5\u5B98\uFF0C\u6574\u7406\uFF1A\u6C89\u9ED8\u738B\u4E8C\uFF0C\u6233"),d={href:"https://mp.weixin.qq.com/s/bImCIoYsH_JEzTkBx2lj4A",target:"_blank",rel:"noopener noreferrer"},k=n("\u8F6C\u8F7D\u94FE\u63A5"),v=n("\uFF0C\u4F5C\u8005\uFF1A\u4E09\u5206\u6076\uFF0C\u6233"),m={href:"https://mp.weixin.qq.com/s/1jhBZrAb7bnvkgN1TgAUpw",target:"_blank",rel:"noopener noreferrer"},h=n("\u539F\u6587\u94FE\u63A5"),b=n("\u3002"),g=t(`<h2 id="\u57FA\u7840" tabindex="-1"><a class="header-anchor" href="#\u57FA\u7840" aria-hidden="true">#</a> \u57FA\u7840</h2><h3 id="_1-\u5E76\u884C\u8DDF\u5E76\u53D1\u6709\u4EC0\u4E48\u533A\u522B" tabindex="-1"><a class="header-anchor" href="#_1-\u5E76\u884C\u8DDF\u5E76\u53D1\u6709\u4EC0\u4E48\u533A\u522B" aria-hidden="true">#</a> 1.\u5E76\u884C\u8DDF\u5E76\u53D1\u6709\u4EC0\u4E48\u533A\u522B\uFF1F</h3><p>\u4ECE\u64CD\u4F5C\u7CFB\u7EDF\u7684\u89D2\u5EA6\u6765\u770B\uFF0C\u7EBF\u7A0B\u662FCPU\u5206\u914D\u7684\u6700\u5C0F\u5355\u4F4D\u3002</p><ul><li>\u5E76\u884C\u5C31\u662F\u540C\u4E00\u65F6\u523B\uFF0C\u4E24\u4E2A\u7EBF\u7A0B\u90FD\u5728\u6267\u884C\u3002\u8FD9\u5C31\u8981\u6C42\u6709\u4E24\u4E2ACPU\u53BB\u5206\u522B\u6267\u884C\u4E24\u4E2A\u7EBF\u7A0B\u3002</li><li>\u5E76\u53D1\u5C31\u662F\u540C\u4E00\u65F6\u523B\uFF0C\u53EA\u6709\u4E00\u4E2A\u6267\u884C\uFF0C\u4F46\u662F\u4E00\u4E2A\u65F6\u95F4\u6BB5\u5185\uFF0C\u4E24\u4E2A\u7EBF\u7A0B\u90FD\u6267\u884C\u4E86\u3002\u5E76\u53D1\u7684\u5B9E\u73B0\u4F9D\u8D56\u4E8ECPU\u5207\u6362\u7EBF\u7A0B\uFF0C\u56E0\u4E3A\u5207\u6362\u7684\u65F6\u95F4\u7279\u522B\u77ED\uFF0C\u6240\u4EE5\u57FA\u672C\u5BF9\u4E8E\u7528\u6237\u662F\u65E0\u611F\u77E5\u7684\u3002</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/javathread-1.png" alt="\u5E76\u884C\u548C\u5E76\u53D1"></p><p>\u5C31\u597D\u50CF\u6211\u4EEC\u53BB\u98DF\u5802\u6253\u996D\uFF0C\u5E76\u884C\u5C31\u662F\u6211\u4EEC\u5728\u591A\u4E2A\u7A97\u53E3\u6392\u961F\uFF0C\u51E0\u4E2A\u963F\u59E8\u540C\u65F6\u6253\u83DC\uFF1B\u5E76\u53D1\u5C31\u662F\u6211\u4EEC\u6324\u5728\u4E00\u4E2A\u7A97\u53E3\uFF0C\u963F\u59E8\u7ED9\u8FD9\u4E2A\u6253\u4E00\u52FA\uFF0C\u53C8\u624B\u5FD9\u811A\u4E71\u5730\u7ED9\u90A3\u4E2A\u6253\u4E00\u52FA\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/javathread-2.png" alt="\u5E76\u884C\u5E76\u53D1\u548C\u98DF\u5802\u6253\u996D"></p><h3 id="_2-\u8BF4\u8BF4\u4EC0\u4E48\u662F\u8FDB\u7A0B\u548C\u7EBF\u7A0B" tabindex="-1"><a class="header-anchor" href="#_2-\u8BF4\u8BF4\u4EC0\u4E48\u662F\u8FDB\u7A0B\u548C\u7EBF\u7A0B" aria-hidden="true">#</a> 2.\u8BF4\u8BF4\u4EC0\u4E48\u662F\u8FDB\u7A0B\u548C\u7EBF\u7A0B\uFF1F</h3><p>\u8981\u8BF4\u7EBF\u7A0B\uFF0C\u5FC5\u987B\u5F97\u5148\u8BF4\u8BF4\u8FDB\u7A0B\u3002</p><ul><li>\u8FDB\u7A0B\uFF1A\u8FDB\u7A0B\u662F\u4EE3\u7801\u5728\u6570\u636E\u96C6\u5408\u4E0A\u7684\u4E00\u6B21\u8FD0\u884C\u6D3B\u52A8\uFF0C\u662F\u7CFB\u7EDF\u8FDB\u884C\u8D44\u6E90\u5206\u914D\u548C\u8C03\u5EA6\u7684\u57FA\u672C\u5355\u4F4D\u3002</li><li>\u7EBF\u7A0B\uFF1A\u7EBF\u7A0B\u662F\u8FDB\u7A0B\u7684\u4E00\u4E2A\u6267\u884C\u8DEF\u5F84\uFF0C\u4E00\u4E2A\u8FDB\u7A0B\u4E2D\u81F3\u5C11\u6709\u4E00\u4E2A\u7EBF\u7A0B\uFF0C\u8FDB\u7A0B\u4E2D\u7684\u591A\u4E2A\u7EBF\u7A0B\u5171\u4EAB\u8FDB\u7A0B\u7684\u8D44\u6E90\u3002</li></ul><p>\u64CD\u4F5C\u7CFB\u7EDF\u5728\u5206\u914D\u8D44\u6E90\u65F6\u662F\u628A\u8D44\u6E90\u5206\u914D\u7ED9\u8FDB\u7A0B\u7684\uFF0C \u4F46\u662F CPU \u8D44\u6E90\u6BD4\u8F83\u7279\u6B8A\uFF0C\u5B83\u662F\u88AB\u5206\u914D\u5230\u7EBF\u7A0B\u7684\uFF0C\u56E0\u4E3A\u771F\u6B63\u8981\u5360\u7528CPU\u8FD0\u884C\u7684\u662F\u7EBF\u7A0B\uFF0C\u6240\u4EE5\u4E5F\u8BF4\u7EBF\u7A0B\u662F CPU\u5206\u914D\u7684\u57FA\u672C\u5355\u4F4D\u3002</p><p>\u6BD4\u5982\u5728Java\u4E2D\uFF0C\u5F53\u6211\u4EEC\u542F\u52A8 main \u51FD\u6570\u5176\u5B9E\u5C31\u542F\u52A8\u4E86\u4E00\u4E2AJVM\u8FDB\u7A0B\uFF0C\u800C main \u51FD\u6570\u5728\u7684\u7EBF\u7A0B\u5C31\u662F\u8FD9\u4E2A\u8FDB\u7A0B\u4E2D\u7684\u4E00\u4E2A\u7EBF\u7A0B\uFF0C\u4E5F\u79F0\u4E3B\u7EBF\u7A0B\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/javathread-3.png" alt="\u7A0B\u5E8F\u8FDB\u7A0B\u7EBF\u7A0B\u5173\u7CFB"></p><p>\u4E00\u4E2A\u8FDB\u7A0B\u4E2D\u6709\u591A\u4E2A\u7EBF\u7A0B\uFF0C\u591A\u4E2A\u7EBF\u7A0B\u5171\u7528\u8FDB\u7A0B\u7684\u5806\u548C\u65B9\u6CD5\u533A\u8D44\u6E90\uFF0C\u4F46\u662F\u6BCF\u4E2A\u7EBF\u7A0B\u6709\u81EA\u5DF1\u7684\u7A0B\u5E8F\u8BA1\u6570\u5668\u548C\u6808\u3002</p><h3 id="_3-\u8BF4\u8BF4\u7EBF\u7A0B\u6709\u51E0\u79CD\u521B\u5EFA\u65B9\u5F0F" tabindex="-1"><a class="header-anchor" href="#_3-\u8BF4\u8BF4\u7EBF\u7A0B\u6709\u51E0\u79CD\u521B\u5EFA\u65B9\u5F0F" aria-hidden="true">#</a> 3.\u8BF4\u8BF4\u7EBF\u7A0B\u6709\u51E0\u79CD\u521B\u5EFA\u65B9\u5F0F\uFF1F</h3><p>Java\u4E2D\u521B\u5EFA\u7EBF\u7A0B\u4E3B\u8981\u6709\u4E09\u79CD\u65B9\u5F0F\uFF0C\u5206\u522B\u4E3A\u7EE7\u627FThread\u7C7B\u3001\u5B9E\u73B0Runnable\u63A5\u53E3\u3001\u5B9E\u73B0Callable\u63A5\u53E3\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/javathread-4.png" alt="\u7EBF\u7A0B\u521B\u5EFA\u4E09\u79CD\u65B9\u5F0F"></p><ul><li>\u7EE7\u627FThread\u7C7B\uFF0C\u91CD\u5199run()\u65B9\u6CD5\uFF0C\u8C03\u7528start()\u65B9\u6CD5\u542F\u52A8\u7EBF\u7A0B</li></ul><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">ThreadTest</span> <span class="token punctuation">{</span>
 
     <span class="token doc-comment comment">/**
      * \u7EE7\u627FThread\u7C7B
diff --git a/dist/assets/javaxuexidaoshemechengduokeyizhaodiyifengongzuo.html.2958c9b6.js b/dist/assets/javaxuexidaoshemechengduokeyizhaodiyifengongzuo.html.6e4f2abd.js
similarity index 98%
rename from dist/assets/javaxuexidaoshemechengduokeyizhaodiyifengongzuo.html.2958c9b6.js
rename to dist/assets/javaxuexidaoshemechengduokeyizhaodiyifengongzuo.html.6e4f2abd.js
index 592edcaf..1a151088 100644
--- a/dist/assets/javaxuexidaoshemechengduokeyizhaodiyifengongzuo.html.2958c9b6.js
+++ b/dist/assets/javaxuexidaoshemechengduokeyizhaodiyifengongzuo.html.6e4f2abd.js
@@ -1 +1 @@
-import{_ as r}from"./plugin-vue_export-helper.21dcd24c.js";import{r as n,o as p,c as s,a as e,b as a,e as h,d as t}from"./app.a0271b9c.js";const c={},i=h('<p>\u73B0\u5728\u5F88\u665A\u4E86\uFF0C\u4F46\u662F\u770B\u5230\u8FD9\u4E2A\u95EE\u9898\u8FD8\u662F\u6BD4\u8F83\u6709\u611F\u89E6\u7684\u3002\u4E00\u5E74\u524D\uFF0C\u6211\u5927\u4E09\u4E0A\u5B66\u671F\uFF0C\u521B\u4E1A\u5931\u8D25\uFF0C\u60F3\u8F6C\u884C\u505A\u6280\u672F\u3002\u90A3\u65F6\u5019\u6211\u5BF9Java\u521A\u521A\u4E86\u89E3\u8FD9\u51E0\u4E2A\u82F1\u8BED\u5355\u8BCD\u3002 \u81EA\u5DF1\u4E70\u4E86\u672CJava\u4ECE\u5165\u95E8\u5230\u7CBE\u901A\u3002\u4EE5\u4E3A\u53EF\u4EE5\u5F88\u5FEB\u7684\u5B66\u5B8C\uFF0C\u975ECS\u4E13\u4E1A\u3002<br> \u73B0\u5728\u6211\u60F3\u8BF4\u6240\u6709\u7CFB\u5217\u7684\u4ECE\u5165\u95E8\u5230\u7CBE\u901A\u90FD\u662F\u5783\u573E\uFF0C\u4E00\u5E74\u591A\u6765\uFF0C\u6211\u6BCF\u5929\u767D\u5929\u770B\u89C6\u9891\uFF0C\u665A\u4E0A\u6572\u4EE3\u7801\u5230\u51CC\u6668\uFF0C\u6211\u662F\u4E00\u4E2A\u5F88\u5014\u7684\u4EBA\uFF0C\u6211\u8BA4\u4E3A\u5929\u4E0B\u6CA1\u6709\u4EFB\u4F55\u4E1C\u897F\u662F\u4EBA\u7C7B\u5B66\u4E0D\u4F1A\u7684\uFF0C\u6240\u4EE5\u6211\u5C31\u4ED8\u51FA\u9AD8\u4E09\u4E00\u6837\u7684\u65F6\u95F4\u53BB\u5B66\u4E60\u3002\u6700\u5F00\u59CB\u5B66\u4E60Java SE\uFF0C\u770B\u7740\u63A7\u5236\u53F0\u6253\u5370\u51FA\u7B2C\u4E00\u884CHello world\u7684\u6B23\u559C\uFF0C\u5230\u540E\u9762\u5B66\u4E60\u6253\u5370\u4E8C\u7EF4\u6570\u7EC4\u7B97\u6CD5\u83F1\u5F62\u7684\u6050\u614C\uFF0C\u518D\u5230\u540E\u9762\u5B66\u4E60Java Swing\u7684\u6709\u8DA3\uFF0C\u518D\u5230\u540E\u9762\u81EA\u5DF1\u5F00\u53D1\u51E0\u6B3E\u5C0F\u6E38\u620F\u3002<br> \u8FD9\u5176\u4E2D\u6709\u82E6\u6709\u7D2F\uFF0C\u603B\u4E4B\u5C31\u662F\u5F88\u5B64\u72EC\uFF0C\u6211\u4ECE\u5B66\u6821\u642C\u5230\u4E86\u5916\u9762\u7684\u5C0F\u533A\uFF0C\u6BCF\u5929\u4ECE\u4E8B\u7740\u81EA\u5DF1\u559C\u6B22\u7684\u4E8B\u60C5\uFF0C\u4E00\u76F4\u52302018\u5E741\u67083\u53F7\uFF0C\u6B63\u5F0F\u5165\u804C\u3002\u662F\u4E00\u4E2A\u521D\u521B\u516C\u53F8\u7684\u540E\u7AEF\u4E3B\u8981\u8D1F\u8D23\u4EBA\u3002\u4E00\u5171\u6536\u52304\u4E2Aoffer\u3002\u6295\u4E8610\u591A\u5BB6\u3002</p><p><img src="https://pic1.zhimg.com/50/v2-a98b7176502aa77b4b4cdd6f6d0cdc3a_720w.jpg?source=1940ef5c" alt=""></p><p>![](data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="1536" height="2048"></svg>)</p><p>\u8FD9\u662F\u8FD9\u4E00\u5E74\u6765\u6211\u770B\u7684\u4E00\u4E9B\u4E66\u7C4D\u3002</p><p><img src="https://pic1.zhimg.com/50/v2-229434bfc073bc81f03a83ef32252e2a_720w.jpg?source=1940ef5c" alt=""></p><p>![](data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="719" height="960"></svg>)</p><p>\u521A\u5F00\u59CB\u7684\u5B66\u4E60\u5341\u5206\u76F2\u76EE\uFF0C\u4E0D\u77E5\u9053\u5982\u4F55\u53BB\u5B66\u4E60\uFF0C\u770B\u5230\u4E00\u4E2A\u4E1C\u897F\u89C9\u5F97\u6709\u8DA3\u5C31\u53BB\u7814\u7A76\uFF0C\u7ED3\u679C\u6700\u540E\u6CA1\u6709\u7CFB\u7EDF\u6027\u7684\u5B66\u4E60\uFF0C\u8FD8\u6D6A\u8D39\u4E86\u5927\u91CF\u7684\u65F6\u95F4\u3002</p><p><img src="https://pica.zhimg.com/50/v2-0cc652d7c1ca6aa64a207745b0109007_720w.jpg?source=1940ef5c" alt=""></p><p>![](data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="720" height="1314"></svg>)</p><p>\u73B0\u5728\u6211\u89C9\u5F97\u5982\u679C\u4F60\u8981\u5B66\u4E60Java\u6280\u672F\u53EF\u4EE5\u5148\u81EA\u5B66\u4E00\u6BB5\u65F6\u95F4\uFF0C\u770B\u81EA\u5DF1\u5408\u4E0D\u5408\u9002\uFF0C\u4F46\u662F\u4E00\u5B9A\u8981\u575A\u6301\uFF0C\u56E0\u4E3A\u65E2\u7136\u9009\u62E9\u4E86IT\uFF0C\u5C31\u8981\u517B\u6210\u7EC8\u751F\u5B66\u4E60\u7684\u4E60\u60EF\u3002\u4E0B\u9762\u662F\u6211\u89C9\u5F97\u4F60\u4F5C\u4E3A\u521D\u7EA7Java\u5DE5\u7A0B\u5E08\u5E94\u8BE5\u638C\u63E1\u7684\u6280\u672F\u3002</p><p>1.Java SE\u90E8\u5206 \u521D\u7EA7\u8BED\u6CD5\uFF0C\u9762\u5411\u5BF9\u8C61\uFF0C\u5F02\u5E38\uFF0CIO\u6D41\uFF0C\u591A\u7EBF\u7A0B\uFF0CJava Swing\uFF0CJDBC\uFF0C\u6CDB\u578B\uFF0C\u6CE8\u89E3\uFF0C\u53CD\u5C04\u7B49\u3002</p><p>2.\u6570\u636E\u5E93\u90E8\u5206\uFF0C\u57FA\u7840\u7684sql\u8BED\u53E5\uFF0Csql\u8BED\u53E5\u8C03\u4F18\uFF0C\u7D22\u5F15\uFF0C\u6570\u636E\u5E93\u5F15\u64CE\uFF0C\u5B58\u50A8\u8FC7\u7A0B\uFF0C\u89E6\u53D1\u5668\uFF0C\u4E8B\u52A1\u7B49\u3002</p><p>3. \u524D\u7AEF\u90E8\u5206\uFF0C HTML5 CSS3 JS(\u548CJava\u4E00\u6837\u590D\u6742\uFF0C\u4F1A\u4F7F\u7528\u5C31\u884C)\uFF0C HTML DOM Jquery BootStrap\u7B49\u3002</p><p>4. 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diff --git a/dist/assets/jdk-while-for-wuxian-xunhuan.html.a0c2087a.js b/dist/assets/jdk-while-for-wuxian-xunhuan.html.a5707bd9.js
similarity index 99%
rename from dist/assets/jdk-while-for-wuxian-xunhuan.html.a0c2087a.js
rename to dist/assets/jdk-while-for-wuxian-xunhuan.html.a5707bd9.js
index d1ad748e..6d4088b8 100644
--- a/dist/assets/jdk-while-for-wuxian-xunhuan.html.a0c2087a.js
+++ b/dist/assets/jdk-while-for-wuxian-xunhuan.html.a5707bd9.js
@@ -1,4 +1,4 @@
-import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e}from"./app.a0271b9c.js";const i={},l=e(`<h1 id="\u4E3A\u4EC0\u4E48jdk\u6E90\u7801\u4E2D-\u65E0\u9650\u5FAA\u73AF\u5927\u591A\u4F7F\u7528for-\u800C\u4E0D\u662Fwhile-true" tabindex="-1"><a class="header-anchor" href="#\u4E3A\u4EC0\u4E48jdk\u6E90\u7801\u4E2D-\u65E0\u9650\u5FAA\u73AF\u5927\u591A\u4F7F\u7528for-\u800C\u4E0D\u662Fwhile-true" aria-hidden="true">#</a> \u4E3A\u4EC0\u4E48JDK\u6E90\u7801\u4E2D\uFF0C\u65E0\u9650\u5FAA\u73AF\u5927\u591A\u4F7F\u7528for(;;)\u800C\u4E0D\u662Fwhile(true)?</h1><p>\u5728\u77E5\u4E4E\u4E0A\u770B\u5230 R \u5927\u7684\u8FD9\u7BC7\u56DE\u7B54\uFF0C\u7740\u5B9E\u611F\u89C9\u9700\u8981\u5206\u4EAB\u7ED9\u5728\u5EA7\u7684\u5404\u4F4D javaer \u4EEC\uFF0C\u771F\u5FC3\u900F\u5F7B\u3002</p><blockquote><p>https://www.zhihu.com/question/52311366/answer/130090347</p></blockquote><hr><p>\u9996\u5148\u662F\u5148\u95EE\u662F\u4E0D\u662F\u518D\u95EE\u4E3A\u4EC0\u4E48\u7CFB\u5217\u3002</p><p>\u5728JDK8u\u7684jdk\u9879\u76EE\u4E0B\u505A\u4E2A\u5F88\u7C97\u7565\u7684\u641C\u7D22\uFF1A</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>mymbp:/Users/me/workspace/jdk8u/jdk/src
+import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e}from"./app.615e41d8.js";const i={},l=e(`<h1 id="\u4E3A\u4EC0\u4E48jdk\u6E90\u7801\u4E2D-\u65E0\u9650\u5FAA\u73AF\u5927\u591A\u4F7F\u7528for-\u800C\u4E0D\u662Fwhile-true" tabindex="-1"><a class="header-anchor" href="#\u4E3A\u4EC0\u4E48jdk\u6E90\u7801\u4E2D-\u65E0\u9650\u5FAA\u73AF\u5927\u591A\u4F7F\u7528for-\u800C\u4E0D\u662Fwhile-true" aria-hidden="true">#</a> \u4E3A\u4EC0\u4E48JDK\u6E90\u7801\u4E2D\uFF0C\u65E0\u9650\u5FAA\u73AF\u5927\u591A\u4F7F\u7528for(;;)\u800C\u4E0D\u662Fwhile(true)?</h1><p>\u5728\u77E5\u4E4E\u4E0A\u770B\u5230 R \u5927\u7684\u8FD9\u7BC7\u56DE\u7B54\uFF0C\u7740\u5B9E\u611F\u89C9\u9700\u8981\u5206\u4EAB\u7ED9\u5728\u5EA7\u7684\u5404\u4F4D javaer \u4EEC\uFF0C\u771F\u5FC3\u900F\u5F7B\u3002</p><blockquote><p>https://www.zhihu.com/question/52311366/answer/130090347</p></blockquote><hr><p>\u9996\u5148\u662F\u5148\u95EE\u662F\u4E0D\u662F\u518D\u95EE\u4E3A\u4EC0\u4E48\u7CFB\u5217\u3002</p><p>\u5728JDK8u\u7684jdk\u9879\u76EE\u4E0B\u505A\u4E2A\u5F88\u7C97\u7565\u7684\u641C\u7D22\uFF1A</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>mymbp:/Users/me/workspace/jdk8u/jdk/src
 $ egrep -nr &quot;for \\\\(\\\\s?;\\\\s?;&quot; . | wc -l
      369
 mymbp:/Users/me/workspace/jdk8u/jdk/src
diff --git a/dist/assets/jdk9-char-byte-string.html.27d20839.js b/dist/assets/jdk9-char-byte-string.html.884765a3.js
similarity index 99%
rename from dist/assets/jdk9-char-byte-string.html.27d20839.js
rename to dist/assets/jdk9-char-byte-string.html.884765a3.js
index 58f6de63..e50d82dc 100644
--- a/dist/assets/jdk9-char-byte-string.html.27d20839.js
+++ b/dist/assets/jdk9-char-byte-string.html.884765a3.js
@@ -1,4 +1,4 @@
-import{_ as a}from"./plugin-vue_export-helper.21dcd24c.js";import{o as e,c as n,e as s}from"./app.a0271b9c.js";const t={},i=s(`<h1 id="jdk9\u4E3A\u4F55\u8981\u5C06string\u7684\u5E95\u5C42\u5B9E\u73B0\u7531char-\u6539\u6210\u4E86byte" tabindex="-1"><a class="header-anchor" href="#jdk9\u4E3A\u4F55\u8981\u5C06string\u7684\u5E95\u5C42\u5B9E\u73B0\u7531char-\u6539\u6210\u4E86byte" aria-hidden="true">#</a> jdk9\u4E3A\u4F55\u8981\u5C06String\u7684\u5E95\u5C42\u5B9E\u73B0\u7531char[]\u6539\u6210\u4E86byte[]?</h1><p>\u5927\u5BB6\u597D\uFF0C\u6211\u662F\u4E8C\u54E5\u5440\uFF01\u5982\u679C\u4F60\u4E0D\u662F Java8 \u7684\u9489\u5B50\u6237\uFF0C\u4F60\u5E94\u8BE5\u65E9\u5C31\u53D1\u73B0\u4E86\uFF1AString \u7C7B\u7684\u6E90\u7801\u5DF2\u7ECF\u7531 <code>char[]</code> \u4F18\u5316\u4E3A\u4E86 <code>byte[]</code> \u6765\u5B58\u50A8\u5B57\u7B26\u4E32\u5185\u5BB9\uFF0C\u4E3A\u4EC0\u4E48\u8981\u8FD9\u6837\u505A\u5462\uFF1F</p><p>\u5F00\u95E8\u89C1\u5C71\u5730\u8BF4\uFF0C\u4ECE <code>char[]</code> \u5230 <code>byte[]</code>\uFF0C\u6700\u4E3B\u8981\u7684\u76EE\u7684\u662F<strong>\u4E3A\u4E86\u8282\u7701\u5B57\u7B26\u4E32\u5360\u7528\u7684\u5185\u5B58</strong>\u3002\u5185\u5B58\u5360\u7528\u51CF\u5C11\u5E26\u6765\u7684\u53E6\u5916\u4E00\u4E2A\u597D\u5904\uFF0C\u5C31\u662F GC \u6B21\u6570\u4E5F\u4F1A\u51CF\u5C11\u3002</p><h3 id="\u4E00\u3001\u4E3A\u4EC0\u4E48\u8981\u4F18\u5316-string-\u8282\u7701\u5185\u5B58\u7A7A\u95F4" tabindex="-1"><a class="header-anchor" href="#\u4E00\u3001\u4E3A\u4EC0\u4E48\u8981\u4F18\u5316-string-\u8282\u7701\u5185\u5B58\u7A7A\u95F4" aria-hidden="true">#</a> \u4E00\u3001\u4E3A\u4EC0\u4E48\u8981\u4F18\u5316 String \u8282\u7701\u5185\u5B58\u7A7A\u95F4</h3><p>\u6211\u4EEC\u4F7F\u7528 <code>jmap -histo:live pid | head -n 10</code> \u547D\u4EE4\u5C31\u53EF\u4EE5\u67E5\u770B\u5230\u5806\u5185\u5BF9\u8C61\u793A\u4F8B\u7684\u7EDF\u8BA1\u4FE1\u606F\u3001\u67E5\u770B ClassLoader \u7684\u4FE1\u606F\u4EE5\u53CA finalizer \u961F\u5217\u3002</p><p>\u4EE5\u6211\u6B63\u5728\u8FD0\u884C\u7740\u7684\u7F16\u7A0B\u55B5\u55B5\u9879\u76EE\u5B9E\u4F8B\uFF08\u57FA\u4E8E Java 8\uFF09\u6765\u8BF4\uFF0C\u7ED3\u679C\u662F\u8FD9\u6837\u7684\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/basic-extra-meal/jdk9-char-byte-string-d826ce88-bbbe-47a3-a1a9-4dd86dd3632f.png" alt=""></p><p>\u5176\u4E2D String \u5BF9\u8C61\u6709 17638 \u4E2A\uFF0C\u5360\u7528\u4E86 423312 \u4E2A\u5B57\u8282\u7684\u5185\u5B58\uFF0C\u6392\u5728\u7B2C\u4E09\u4F4D\u3002</p><p>\u7531\u4E8E Java 8 \u7684 String \u5185\u90E8\u5B9E\u73B0\u4ECD\u7136\u662F <code>char[]</code>\uFF0C\u6240\u4EE5\u6211\u4EEC\u53EF\u4EE5\u770B\u5230\u5185\u5B58\u5360\u7528\u6392\u5728\u7B2C 1 \u4F4D\u7684\u5C31\u662F char \u6570\u7EC4\u3002</p><p><code>char[]</code> \u5BF9\u8C61\u6709 17673 \u4E2A\uFF0C\u5360\u7528\u4E86 1621352 \u4E2A\u5B57\u8282\u7684\u5185\u5B58\uFF0C\u6392\u5728\u7B2C\u4E00\u4F4D\u3002</p><p>\u90A3\u4E5F\u5C31\u662F\u8BF4\u4F18\u5316 String \u8282\u7701\u5185\u5B58\u7A7A\u95F4\u662F\u975E\u5E38\u6709\u5FC5\u8981\u7684\uFF0C\u5982\u679C\u662F\u53BB\u4F18\u5316\u4E00\u4E2A\u4F7F\u7528\u9891\u7387\u6CA1\u6709 String \u8FD9\u4E48\u9AD8\u7684\u7C7B\u5E93\uFF0C\u5C31\u663E\u5F97\u975E\u5E38\u7684\u9E21\u808B\u3002</p><h3 id="\u4E8C\u3001byte-\u4E3A\u4EC0\u4E48\u5C31\u80FD\u8282\u7701\u5185\u5B58\u7A7A\u95F4\u5462" tabindex="-1"><a class="header-anchor" href="#\u4E8C\u3001byte-\u4E3A\u4EC0\u4E48\u5C31\u80FD\u8282\u7701\u5185\u5B58\u7A7A\u95F4\u5462" aria-hidden="true">#</a> \u4E8C\u3001<code>byte[]</code> \u4E3A\u4EC0\u4E48\u5C31\u80FD\u8282\u7701\u5185\u5B58\u7A7A\u95F4\u5462\uFF1F</h3><p>\u4F17\u6240\u5468\u77E5\uFF0Cchar \u7C7B\u578B\u7684\u6570\u636E\u5728 JVM \u4E2D\u662F\u5360\u7528\u4E24\u4E2A\u5B57\u8282\u7684\uFF0C\u5E76\u4E14\u4F7F\u7528\u7684\u662F UTF-8 \u7F16\u7801\uFF0C\u5176\u503C\u8303\u56F4\u5728 &#39;\\u0000&#39;\uFF080\uFF09\u548C &#39;\\uffff&#39;\uFF0865,535\uFF09\uFF08\u5305\u542B\uFF09\u4E4B\u95F4\u3002</p><p>\u4E5F\u5C31\u662F\u8BF4\uFF0C\u4F7F\u7528 <code>char[]</code> \u6765\u8868\u793A String \u5C31\u5BFC\u81F4\u4E86\u5373\u4F7F String \u4E2D\u7684\u5B57\u7B26\u53EA\u7528\u4E00\u4E2A\u5B57\u8282\u5C31\u80FD\u8868\u793A\uFF0C\u4E5F\u5F97\u5360\u7528\u4E24\u4E2A\u5B57\u8282\u3002</p><p>\u800C\u5B9E\u9645\u5F00\u53D1\u4E2D\uFF0C\u5355\u5B57\u8282\u7684\u5B57\u7B26\u4F7F\u7528\u9891\u7387\u4ECD\u7136\u8981\u9AD8\u4E8E\u53CC\u5B57\u8282\u7684\u3002</p><p>\u5F53\u7136\u4E86\uFF0C\u4EC5\u4EC5\u5C06 <code>char[]</code> \u4F18\u5316\u4E3A <code>byte[]</code> \u662F\u4E0D\u591F\u7684\uFF0C\u8FD8\u8981\u914D\u5408 Latin-1 \u7684\u7F16\u7801\u65B9\u5F0F\uFF0C\u8BE5\u7F16\u7801\u65B9\u5F0F\u662F\u7528\u5355\u4E2A\u5B57\u8282\u6765\u8868\u793A\u5B57\u7B26\u7684\uFF0C\u8FD9\u6837\u5C31\u6BD4 UTF-8 \u7F16\u7801\u8282\u7701\u4E86\u66F4\u591A\u7684\u7A7A\u95F4\u3002</p><p>\u6362\u53E5\u8BDD\u8BF4\uFF0C\u5BF9\u4E8E\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">String</span> name <span class="token operator">=</span> <span class="token string">&quot;jack&quot;</span><span class="token punctuation">;</span>
+import{_ as a}from"./plugin-vue_export-helper.21dcd24c.js";import{o as e,c as n,e as s}from"./app.615e41d8.js";const t={},i=s(`<h1 id="jdk9\u4E3A\u4F55\u8981\u5C06string\u7684\u5E95\u5C42\u5B9E\u73B0\u7531char-\u6539\u6210\u4E86byte" tabindex="-1"><a class="header-anchor" href="#jdk9\u4E3A\u4F55\u8981\u5C06string\u7684\u5E95\u5C42\u5B9E\u73B0\u7531char-\u6539\u6210\u4E86byte" aria-hidden="true">#</a> jdk9\u4E3A\u4F55\u8981\u5C06String\u7684\u5E95\u5C42\u5B9E\u73B0\u7531char[]\u6539\u6210\u4E86byte[]?</h1><p>\u5927\u5BB6\u597D\uFF0C\u6211\u662F\u4E8C\u54E5\u5440\uFF01\u5982\u679C\u4F60\u4E0D\u662F Java8 \u7684\u9489\u5B50\u6237\uFF0C\u4F60\u5E94\u8BE5\u65E9\u5C31\u53D1\u73B0\u4E86\uFF1AString \u7C7B\u7684\u6E90\u7801\u5DF2\u7ECF\u7531 <code>char[]</code> \u4F18\u5316\u4E3A\u4E86 <code>byte[]</code> \u6765\u5B58\u50A8\u5B57\u7B26\u4E32\u5185\u5BB9\uFF0C\u4E3A\u4EC0\u4E48\u8981\u8FD9\u6837\u505A\u5462\uFF1F</p><p>\u5F00\u95E8\u89C1\u5C71\u5730\u8BF4\uFF0C\u4ECE <code>char[]</code> \u5230 <code>byte[]</code>\uFF0C\u6700\u4E3B\u8981\u7684\u76EE\u7684\u662F<strong>\u4E3A\u4E86\u8282\u7701\u5B57\u7B26\u4E32\u5360\u7528\u7684\u5185\u5B58</strong>\u3002\u5185\u5B58\u5360\u7528\u51CF\u5C11\u5E26\u6765\u7684\u53E6\u5916\u4E00\u4E2A\u597D\u5904\uFF0C\u5C31\u662F GC \u6B21\u6570\u4E5F\u4F1A\u51CF\u5C11\u3002</p><h3 id="\u4E00\u3001\u4E3A\u4EC0\u4E48\u8981\u4F18\u5316-string-\u8282\u7701\u5185\u5B58\u7A7A\u95F4" tabindex="-1"><a class="header-anchor" href="#\u4E00\u3001\u4E3A\u4EC0\u4E48\u8981\u4F18\u5316-string-\u8282\u7701\u5185\u5B58\u7A7A\u95F4" aria-hidden="true">#</a> \u4E00\u3001\u4E3A\u4EC0\u4E48\u8981\u4F18\u5316 String \u8282\u7701\u5185\u5B58\u7A7A\u95F4</h3><p>\u6211\u4EEC\u4F7F\u7528 <code>jmap -histo:live pid | head -n 10</code> \u547D\u4EE4\u5C31\u53EF\u4EE5\u67E5\u770B\u5230\u5806\u5185\u5BF9\u8C61\u793A\u4F8B\u7684\u7EDF\u8BA1\u4FE1\u606F\u3001\u67E5\u770B ClassLoader \u7684\u4FE1\u606F\u4EE5\u53CA finalizer \u961F\u5217\u3002</p><p>\u4EE5\u6211\u6B63\u5728\u8FD0\u884C\u7740\u7684\u7F16\u7A0B\u55B5\u55B5\u9879\u76EE\u5B9E\u4F8B\uFF08\u57FA\u4E8E Java 8\uFF09\u6765\u8BF4\uFF0C\u7ED3\u679C\u662F\u8FD9\u6837\u7684\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/basic-extra-meal/jdk9-char-byte-string-d826ce88-bbbe-47a3-a1a9-4dd86dd3632f.png" alt=""></p><p>\u5176\u4E2D String \u5BF9\u8C61\u6709 17638 \u4E2A\uFF0C\u5360\u7528\u4E86 423312 \u4E2A\u5B57\u8282\u7684\u5185\u5B58\uFF0C\u6392\u5728\u7B2C\u4E09\u4F4D\u3002</p><p>\u7531\u4E8E Java 8 \u7684 String \u5185\u90E8\u5B9E\u73B0\u4ECD\u7136\u662F <code>char[]</code>\uFF0C\u6240\u4EE5\u6211\u4EEC\u53EF\u4EE5\u770B\u5230\u5185\u5B58\u5360\u7528\u6392\u5728\u7B2C 1 \u4F4D\u7684\u5C31\u662F char \u6570\u7EC4\u3002</p><p><code>char[]</code> \u5BF9\u8C61\u6709 17673 \u4E2A\uFF0C\u5360\u7528\u4E86 1621352 \u4E2A\u5B57\u8282\u7684\u5185\u5B58\uFF0C\u6392\u5728\u7B2C\u4E00\u4F4D\u3002</p><p>\u90A3\u4E5F\u5C31\u662F\u8BF4\u4F18\u5316 String \u8282\u7701\u5185\u5B58\u7A7A\u95F4\u662F\u975E\u5E38\u6709\u5FC5\u8981\u7684\uFF0C\u5982\u679C\u662F\u53BB\u4F18\u5316\u4E00\u4E2A\u4F7F\u7528\u9891\u7387\u6CA1\u6709 String \u8FD9\u4E48\u9AD8\u7684\u7C7B\u5E93\uFF0C\u5C31\u663E\u5F97\u975E\u5E38\u7684\u9E21\u808B\u3002</p><h3 id="\u4E8C\u3001byte-\u4E3A\u4EC0\u4E48\u5C31\u80FD\u8282\u7701\u5185\u5B58\u7A7A\u95F4\u5462" tabindex="-1"><a class="header-anchor" href="#\u4E8C\u3001byte-\u4E3A\u4EC0\u4E48\u5C31\u80FD\u8282\u7701\u5185\u5B58\u7A7A\u95F4\u5462" aria-hidden="true">#</a> \u4E8C\u3001<code>byte[]</code> \u4E3A\u4EC0\u4E48\u5C31\u80FD\u8282\u7701\u5185\u5B58\u7A7A\u95F4\u5462\uFF1F</h3><p>\u4F17\u6240\u5468\u77E5\uFF0Cchar \u7C7B\u578B\u7684\u6570\u636E\u5728 JVM \u4E2D\u662F\u5360\u7528\u4E24\u4E2A\u5B57\u8282\u7684\uFF0C\u5E76\u4E14\u4F7F\u7528\u7684\u662F UTF-8 \u7F16\u7801\uFF0C\u5176\u503C\u8303\u56F4\u5728 &#39;\\u0000&#39;\uFF080\uFF09\u548C &#39;\\uffff&#39;\uFF0865,535\uFF09\uFF08\u5305\u542B\uFF09\u4E4B\u95F4\u3002</p><p>\u4E5F\u5C31\u662F\u8BF4\uFF0C\u4F7F\u7528 <code>char[]</code> \u6765\u8868\u793A String \u5C31\u5BFC\u81F4\u4E86\u5373\u4F7F String \u4E2D\u7684\u5B57\u7B26\u53EA\u7528\u4E00\u4E2A\u5B57\u8282\u5C31\u80FD\u8868\u793A\uFF0C\u4E5F\u5F97\u5360\u7528\u4E24\u4E2A\u5B57\u8282\u3002</p><p>\u800C\u5B9E\u9645\u5F00\u53D1\u4E2D\uFF0C\u5355\u5B57\u8282\u7684\u5B57\u7B26\u4F7F\u7528\u9891\u7387\u4ECD\u7136\u8981\u9AD8\u4E8E\u53CC\u5B57\u8282\u7684\u3002</p><p>\u5F53\u7136\u4E86\uFF0C\u4EC5\u4EC5\u5C06 <code>char[]</code> \u4F18\u5316\u4E3A <code>byte[]</code> \u662F\u4E0D\u591F\u7684\uFF0C\u8FD8\u8981\u914D\u5408 Latin-1 \u7684\u7F16\u7801\u65B9\u5F0F\uFF0C\u8BE5\u7F16\u7801\u65B9\u5F0F\u662F\u7528\u5355\u4E2A\u5B57\u8282\u6765\u8868\u793A\u5B57\u7B26\u7684\uFF0C\u8FD9\u6837\u5C31\u6BD4 UTF-8 \u7F16\u7801\u8282\u7701\u4E86\u66F4\u591A\u7684\u7A7A\u95F4\u3002</p><p>\u6362\u53E5\u8BDD\u8BF4\uFF0C\u5BF9\u4E8E\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">String</span> name <span class="token operator">=</span> <span class="token string">&quot;jack&quot;</span><span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>\u8FD9\u6837\u7684\uFF0C\u4F7F\u7528 Latin-1 \u7F16\u7801\uFF0C\u5360\u7528 4 \u4E2A\u5B57\u8282\u5C31\u591F\u4E86\u3002</p><p>\u4F46\u5BF9\u4E8E\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">String</span> name <span class="token operator">=</span> <span class="token string">&quot;\u5C0F\u4E8C&quot;</span><span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>\u8FD9\u79CD\uFF0C\u6728\u7684\u529E\u6CD5\uFF0C\u53EA\u80FD\u4F7F\u7528 UTF16 \u6765\u7F16\u7801\u3002</p><p>\u9488\u5BF9 JDK 9 \u7684 String \u6E90\u7801\u91CC\uFF0C\u4E3A\u4E86\u533A\u522B\u7F16\u7801\u65B9\u5F0F\uFF0C\u8FFD\u52A0\u4E86\u4E00\u4E2A coder \u5B57\u6BB5\u6765\u533A\u5206\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token doc-comment comment">/**
  * The identifier of the encoding used to encode the bytes in
diff --git a/dist/assets/jiagoushizenyanghuizhijitongjiagoulantu.html.964131a6.js b/dist/assets/jiagoushizenyanghuizhijitongjiagoulantu.html.aafe265c.js
similarity index 99%
rename from dist/assets/jiagoushizenyanghuizhijitongjiagoulantu.html.964131a6.js
rename to dist/assets/jiagoushizenyanghuizhijitongjiagoulantu.html.aafe265c.js
index b6f00619..55199efd 100644
--- a/dist/assets/jiagoushizenyanghuizhijitongjiagoulantu.html.964131a6.js
+++ b/dist/assets/jiagoushizenyanghuizhijitongjiagoulantu.html.aafe265c.js
@@ -1 +1 @@
-import{_ as p}from"./plugin-vue_export-helper.21dcd24c.js";import{o as a,c as i,e}from"./app.a0271b9c.js";const h={},r=e('<h2 id="\u524D\u8A00" tabindex="-1"><a class="header-anchor" href="#\u524D\u8A00" aria-hidden="true">#</a> \u524D\u8A00</h2><p>\u5927\u5BB6\u597D\uFF0C\u6211\u662F\u98D8\u6E3A\u3002</p><p>\u4ECA\u5929\u6211\u4EEC\u6765\u4E86\u89E3\u4E00\u4E9B\u5173\u4E8E\u8F6F\u4EF6\u8BBE\u8BA1\u6587\u6863\u7684\u57FA\u7840\u77E5\u8BC6\uFF0C\u8FD9\u6837\u4F60\u5728\u5B66\u4E60\u540E\u9762\u7684\u5177\u4F53\u6848\u4F8B\u65F6\uFF0C\u5C31\u80FD\u66F4\u52A0\u6E05\u695A\u5730\u7406\u89E3\u6587\u6863\u662F\u57FA\u4E8E\u4EC0\u4E48\u65B9\u5F0F\u6765\u7EC4\u7EC7\u7684\u4E86\u3002</p><p>\u9996\u5148\uFF0C\u8BF7\u4F60\u8BBE\u60F3\u8FD9\u6837\u4E00\u4E2A\u573A\u666F\uFF1A\u5982\u679C\u516C\u53F8\u5B89\u6392\u4F60\u505A\u67B6\u6784\u5E08\uFF0C\u8981\u4F60\u5728\u9879\u76EE\u5F00\u53D1\u524D\u671F\u8FDB\u884C\u8F6F\u4EF6\u67B6\u6784\u8BBE\u8BA1\uFF0C\u4F60\u8BE5\u5982\u4F55\u5F00\u5C55\u4F60\u7684\u5DE5\u4F5C\uFF1F\u5982\u4F55\u8F93\u51FA\u4F60\u7684\u5DE5\u4F5C\u6210\u679C\uFF1F\u5982\u4F55\u786E\u5B9A\u4F60\u7684\u8BBE\u8BA1\u662F\u5426\u6EE1\u8DB3\u7528\u6237\u9700\u6C42\uFF1F\u4F60\u662F\u5426\u6709\u628A\u63E1\u6700\u540E\u4EA4\u4ED8\u7684\u8F6F\u4EF6\u662F\u6EE1\u8DB3\u8981\u6C42\u7684\uFF1F\u662F\u5426\u6709\u628A\u63E1\u8BA9\u56E2\u961F\u6BCF\u4E2A\u5DE5\u7A0B\u5E08\u6E05\u695A\u81EA\u5DF1\u7684\u804C\u8D23\u8303\u56F4\u5E76\u6709\u6548\u5730\u5B8C\u6210\u5F00\u53D1\u5DE5\u4F5C\u2026\u2026</p><p>\u8FD9\u4E9B\u95EE\u9898\u5176\u5B9E\u90FD\u662F\u8F6F\u4EF6\u5F00\u53D1\u7BA1\u7406\u4E0E\u6280\u672F\u67B6\u6784\u7684\u6838\u5FC3\u8BC9\u6C42\uFF0C\u800C\u67B6\u6784\u5E08\u7684\u6838\u5FC3\u5DE5\u4F5C\u5C31\u662F\u505A\u597D\u8F6F\u4EF6\u8BBE\u8BA1\uFF0C\u89E3\u51B3\u8FD9\u4E9B\u8BC9\u6C42\u3002\u8FD9\u4E9B\u95EE\u9898\u641E\u5B9A\u4E86\uFF0C\u8F6F\u4EF6\u7684\u5F00\u53D1\u8FC7\u7A0B\u548C\u7ED3\u679C\u4E5F\u5C31\u90FD\u5F97\u5230\u4E86\u4FDD\u8BC1\u3002\u90A3\u600E\u4E48\u5B9E\u73B0\u8FD9\u4E9B\u8BC9\u6C42\u5462\uFF1F\u6211\u4EEC\u4E3B\u8981\u7684\u624B\u6BB5\u5C31\u662F\u8F6F\u4EF6\u5EFA\u6A21\uFF0C\u4EE5\u53CA\u5C06\u8FD9\u4E9B\u8F6F\u4EF6\u6A21\u578B\u7EC4\u7EC7\u6210\u4E00\u7BC7\u6709\u4EF7\u503C\u7684\u8F6F\u4EF6\u8BBE\u8BA1\u6587\u6863\u3002</p><h2 id="\u8F6F\u4EF6\u5EFA\u6A21" tabindex="-1"><a class="header-anchor" href="#\u8F6F\u4EF6\u5EFA\u6A21" aria-hidden="true">#</a> \u8F6F\u4EF6\u5EFA\u6A21</h2><p>\u6240\u8C13\u8F6F\u4EF6\u5EFA\u6A21\uFF0C\u5C31\u662F\u4E3A\u8981\u5F00\u53D1\u7684\u8F6F\u4EF6\u5EFA\u9020\u6A21\u578B\u3002</p><p>\u6A21\u578B\u662F\u5BF9\u5BA2\u89C2\u5B58\u5728\u7684\u62BD\u8C61\uFF0C\u4F8B\u5982\u8457\u540D\u7684\u7269\u7406\u5B66\u516C\u5F0F E=mc2\uFF0C\u5C31\u662F\u8D28\u91CF\u80FD\u91CF\u8F6C\u6362\u7684\u7269\u7406\u89C4\u5F8B\u7684\u6570\u5B66\u6A21\u578B\u3002\u9664\u4E86\u7269\u7406\u5B66\u516C\u5F0F\u4EE5\u5916\uFF0C\u8FD8\u6709\u4E00\u4E9B\u4E1C\u897F\u4E5F\u662F\u6A21\u578B\uFF0C\u6BD4\u5982\u5730\u56FE\u662F\u5BF9\u5730\u7406\u7A7A\u95F4\u7684\u5EFA\u6A21\uFF1B\u673A\u68B0\u88C5\u7F6E\u3001\u7535\u5B50\u7535\u8DEF\u3001\u5EFA\u7B51\u8BBE\u8BA1\u7684\u5404\u79CD\u56FE\u7EB8\u662F\u5BF9\u7269\u7406\u5B9E\u4F53\u7684\u5EFA\u6A21\u3002\u800C\u8F6F\u4EF6\uFF0C\u4E5F\u53EF\u4EE5\u901A\u8FC7\u5404\u79CD\u56FE\u8FDB\u884C\u5EFA\u6A21\u3002</p><p>\u8F6F\u4EF6\u7CFB\u7EDF\u5E9E\u5927\u590D\u6742\uFF0C\u901A\u8FC7\u8F6F\u4EF6\u5EFA\u6A21\uFF0C\u6211\u4EEC\u53EF\u4EE5\u62BD\u8C61\u8F6F\u4EF6\u7CFB\u7EDF\u7684\u4E3B\u8981\u7279\u5F81\u548C\u7EC4\u6210\u90E8\u5206\uFF0C\u68B3\u7406\u8FD9\u4E9B\u5173\u952E\u7EC4\u6210\u90E8\u5206\u7684\u5173\u7CFB\u3002\u5728\u8F6F\u4EF6\u5F00\u53D1\u8FC7\u7A0B\u4E2D\u4F9D\u7167\u6A21\u578B\u7684\u7EA6\u675F\u5F00\u53D1\uFF0C\u7CFB\u7EDF\u6574\u4F53\u7684\u683C\u5C40\u548C\u5173\u7CFB\u5C31\u4F1A\u53EF\u63A7\u3002\u76F8\u5173\u4EBA\u5458\u4ECE\u59CB\u81F3\u7EC8\u90FD\u80FD\u6E05\u6670\u4E86\u89E3\u8F6F\u4EF6\u7684\u84DD\u56FE\u548C\u5F53\u524D\u7684\u8FDB\u5C55\uFF0C\u4E0D\u540C\u7684\u5F00\u53D1\u5DE5\u7A0B\u5E08\u4F1A\u6E05\u6670\u81EA\u5DF1\u5F00\u53D1\u7684\u6A21\u5757\u548C\u5176\u4ED6\u540C\u4E8B\u5DE5\u4F5C\u5185\u5BB9\u7684\u5173\u7CFB\u4E0E\u4F9D\u8D56\uFF0C\u5E76\u6309\u7167\u8FD9\u4E9B\u6A21\u578B\u5F00\u53D1\u4EE3\u7801\u3002</p><p>\u90A3\u4E48\u6211\u4EEC\u662F\u6839\u636E\u4EC0\u4E48\u8FDB\u884C\u8F6F\u4EF6\u5EFA\u6A21\u7684\u5462\uFF1F\u8981\u89E3\u7B54\u8FD9\u4E2A\u7591\u95EE\uFF0C\u4F60\u9700\u8981\u5148\u77E5\u9053\uFF0C\u5728\u8F6F\u4EF6\u5F00\u53D1\u4E2D\uFF0C\u6709\u4E24\u4E2A\u5BA2\u89C2\u5B58\u5728\u3002</p><p>\u4E00\u4E2A\u662F\u6211\u4EEC\u8981\u89E3\u51B3\u7684\u9886\u57DF\u95EE\u9898\u3002\u6BD4\u5982\u6211\u4EEC\u8981\u5F00\u53D1\u4E00\u4E2A\u7535\u5B50\u5546\u52A1\u7F51\u7AD9\uFF0C\u90A3\u4E48\u5BA2\u89C2\u7684\u9886\u57DF\u95EE\u9898\u5C31\u662F\u5982\u4F55\u505A\u751F\u610F\uFF0C\u5356\u5BB6\u5982\u4F55\u7BA1\u7406\u5546\u54C1\u3001\u7BA1\u7406\u8BA2\u5355\u3001\u670D\u52A1\u7528\u6237\uFF0C\u4E70\u5BB6\u5982\u4F55\u6311\u9009\u5546\u54C1\uFF0C\u5982\u4F55\u4E0B\u8BA2\u5355\uFF0C\u5982\u4F55\u652F\u4ED8\u7B49\u7B49\u3002\u5BF9\u8FD9\u4E9B\u5BA2\u89C2\u9886\u57DF\u95EE\u9898\u7684\u62BD\u8C61\u5C31\u662F\u5404\u79CD\u529F\u80FD\u53CA\u5176\u5173\u7CFB\u3001\u5404\u79CD\u6A21\u578B\u5BF9\u8C61\u53CA\u5176\u5173\u7CFB\u3001\u5404\u79CD\u4E1A\u52A1\u5904\u7406\u6D41\u7A0B\u3002</p><p>\u53E6\u4E00\u4E2A\u5BA2\u89C2\u5B58\u5728\u5C31\u662F\u6700\u7EC8\u5F00\u53D1\u51FA\u6765\u7684\u8F6F\u4EF6\u7CFB\u7EDF\u3002\u8F6F\u4EF6\u7CFB\u7EDF\u8981\u89E3\u51B3\u7684\u95EE\u9898\u5305\u62EC\u8F6F\u4EF6\u7531\u54EA\u4E9B\u4E3B\u8981\u7C7B\u7EC4\u6210\uFF0C\u8FD9\u4E9B\u7C7B\u5982\u4F55\u7EC4\u7EC7\u6784\u6210\u4E00\u4E2A\u4E2A\u7684\u7EC4\u4EF6\uFF0C\u8FD9\u4E9B\u7C7B\u548C\u7EC4\u4EF6\u4E4B\u95F4\u7684\u4F9D\u8D56\u5173\u7CFB\u5982\u4F55\uFF0C\u8FD0\u884C\u671F\u5982\u4F55\u8C03\u7528\uFF0C\u9700\u8981\u90E8\u7F72\u591A\u5C11\u53F0\u670D\u52A1\u5668\uFF0C\u670D\u52A1\u5668\u4E4B\u95F4\u5982\u4F55\u901A\u4FE1\u7B49\u3002</p><p>\u800C\u5BF9\u8FD9\u4E24\u4E2A\u5BA2\u89C2\u5B58\u5728\u8FDB\u884C\u62BD\u8C61\u5316\u5904\u7406\u7684\u624B\u6BB5\uFF0C\u5C31\u662F\u6211\u4EEC\u7684\u8F6F\u4EF6\u6A21\u578B\u3002</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PxMzT0Oibf4ia9Fva7RU38ovpD2mCYXIm1UVdmia0792Oeicm4HEfvaHPvbfyWgbmP8fzxf36tnKWLKwaeiaCmBwCBg/640?wx_fmt=png" alt=""></p><p>\u4E00\u65B9\u9762\u6211\u4EEC\u8981\u5BF9\u9886\u57DF\u95EE\u9898\u548C\u8981\u8BBE\u8BA1\u7684\u8F6F\u4EF6\u7CFB\u7EDF\u8FDB\u884C\u5206\u6790\u3001\u8BBE\u8BA1\u3001\u62BD\u8C61\uFF0C\u53E6\u4E00\u65B9\u9762\uFF0C\u6211\u4EEC\u6839\u636E\u62BD\u8C61\u51FA\u6765\u7684\u6A21\u578B\u8FDB\u884C\u5F00\u53D1\uFF0C\u6700\u7EC8\u5B9E\u73B0\u51FA\u4E00\u4E2A\u8F6F\u4EF6\u7CFB\u7EDF\uFF0C\u8FD9\u5C31\u662F\u8F6F\u4EF6\u5F00\u53D1\u7684\u4E3B\u8981\u8FC7\u7A0B\u3002\u800C\u5BF9\u9886\u57DF\u95EE\u9898\u548C\u8F6F\u4EF6\u7CFB\u7EDF\u8FDB\u884C\u5206\u6790\u3001\u8BBE\u8BA1\u548C\u62BD\u8C61\u7684\u8FD9\u4E2A\u8FC7\u7A0B\uFF0C\u5C31\u662F\u8F6F\u4EF6\u5EFA\u6A21\u8BBE\u8BA1\u3002</p><h2 id="\u8F6F\u4EF6\u8BBE\u8BA1\u65B9\u6CD5" tabindex="-1"><a class="header-anchor" href="#\u8F6F\u4EF6\u8BBE\u8BA1\u65B9\u6CD5" aria-hidden="true">#</a> 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src="https://mmbiz.qpic.cn/mmbiz_png/PxMzT0Oibf4ia9Fva7RU38ovpD2mCYXIm1AUopK9QQDr6pV5WBp5Nkp4JQRrZKBY4PkicgCj6kg4feC1wcW6U5mQw/640?wx_fmt=png" alt=""></p><h3 id="\u65F6\u5E8F\u56FE" tabindex="-1"><a class="header-anchor" href="#\u65F6\u5E8F\u56FE" aria-hidden="true">#</a> \u65F6\u5E8F\u56FE</h3><p>\u7C7B\u56FE\u4E4B\u5916\uFF0C\u53E6\u4E00\u79CD\u5E38\u7528\u7684\u56FE\u662F\u65F6\u5E8F\u56FE\uFF0C\u7C7B\u56FE\u63CF\u8FF0\u7C7B\u4E4B\u95F4\u7684\u9759\u6001\u5173\u7CFB\uFF0C\u65F6\u5E8F\u56FE\u5219\u7528\u6765\u63CF\u8FF0\u53C2\u4E0E\u8005\u4E4B\u95F4\u7684\u52A8\u6001\u8C03\u7528\u5173\u7CFB\u3002</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PxMzT0Oibf4ia9Fva7RU38ovpD2mCYXIm1EcAr3PticUpWHHw7DAczyFaHZVu2UXy8XQ3haOgqqzgYPXFDvfGMahA/640?wx_fmt=png" alt=""></p><h3 id="\u7EC4\u4EF6\u56FE" tabindex="-1"><a class="header-anchor" href="#\u7EC4\u4EF6\u56FE" aria-hidden="true">#</a> 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alt=""></p><p>\u7EC4\u4EF6\u56FE\u63CF\u8FF0\u7EC4\u4EF6\u4E4B\u95F4\u7684\u9759\u6001\u5173\u7CFB\uFF0C\u4E3B\u8981\u662F\u4F9D\u8D56\u5173\u7CFB\uFF0C\u5982\u679C\u4F60\u60F3\u8981\u63CF\u8FF0\u7EC4\u4EF6\u4E4B\u95F4\u7684\u52A8\u6001\u8C03\u7528\u5173\u7CFB\uFF0C\u53EF\u4EE5\u4F7F\u7528\u7EC4\u4EF6\u65F6\u5E8F\u56FE\uFF0C\u4EE5\u7EC4\u4EF6\u4F5C\u4E3A\u53C2\u4E0E\u8005\uFF0C\u63CF\u8FF0\u7EC4\u4EF6\u4E4B\u95F4\u7684\u6D88\u606F\u8C03\u7528\u5173\u7CFB\u3002</p><h3 id="\u90E8\u7F72\u56FE" tabindex="-1"><a class="header-anchor" href="#\u90E8\u7F72\u56FE" aria-hidden="true">#</a> \u90E8\u7F72\u56FE</h3><p>\u90E8\u7F72\u56FE\u63CF\u8FF0\u8F6F\u4EF6\u7CFB\u7EDF\u7684\u6700\u7EC8\u90E8\u7F72\u60C5\u51B5\uFF0C\u6BD4\u5982\u9700\u8981\u90E8\u7F72\u591A\u5C11\u670D\u52A1\u5668\uFF0C\u5173\u952E\u7EC4\u4EF6\u90FD\u90E8\u7F72\u5728\u54EA\u4E9B\u670D\u52A1\u5668\u4E0A\u3002</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PxMzT0Oibf4ia9Fva7RU38ovpD2mCYXIm1Nj686l5iat4aaxb22dzibKUNNdn4fncgRnIjgicia3klrFmJUb4mh2yY2A/640?wx_fmt=png" alt=""></p><p>\u90E8\u7F72\u56FE\u662F\u8F6F\u4EF6\u7CFB\u7EDF\u6700\u7EC8\u7269\u7406\u5448\u73B0\u7684\u84DD\u56FE\uFF0C\u6839\u636E\u90E8\u7F72\u56FE\uFF0C\u6240\u6709\u76F8\u5173\u8005\uFF0C\u8BF8\u5982\u5BA2\u6237\u3001\u8001\u677F\u3001\u5DE5\u7A0B\u5E08\u90FD\u80FD\u6E05\u6670\u5730\u4E86\u89E3\u5230\u6700\u7EC8\u8FD0\u884C\u7684\u7CFB\u7EDF\u5728\u7269\u7406\u4E0A\u662F\u4EC0\u4E48\u6837\u5B50\uFF0C\u548C\u73B0\u6709\u7684\u7CFB\u7EDF\u670D\u52A1\u5668\u7684\u5173\u7CFB\uFF0C\u548C\u7B2C\u4E09\u65B9\u670D\u52A1\u5668\u7684\u5173\u7CFB\u3002\u6839\u636E\u90E8\u7F72\u56FE\uFF0C\u8FD8\u53EF\u4EE5\u4F30\u7B97\u670D\u52A1\u5668\u548C\u7B2C\u4E09\u65B9\u8F6F\u4EF6\u7684\u91C7\u8D2D\u6210\u672C\u3002</p><p>\u56E0\u6B64\u90E8\u7F72\u56FE\u662F\u6574\u4E2A\u8F6F\u4EF6\u8BBE\u8BA1\u6A21\u578B\u4E2D\uFF0C\u6BD4\u8F83\u5B8F\u89C2\u7684\u4E00\u79CD\u56FE\uFF0C\u662F\u5728\u8BBE\u8BA1\u65E9\u671F\u5C31\u9700\u8981\u753B\u7684\u4E00\u79CD\u6A21\u578B\u56FE\u3002\u6839\u636E\u90E8\u7F72\u56FE\uFF0C\u5404\u65B9\u53EF\u4EE5\u8BA8\u8BBA\u5BF9\u8FD9\u4E2A\u65B9\u6848\u662F\u5426\u8BA4\u53EF\u3002\u53EA\u6709\u5BF9\u90E8\u7F72\u56FE\u8FBE\u6210\u5171\u8BC6\uFF0C\u624D\u80FD\u7EE7\u7EED\u540E\u9762\u7684\u7EC6\u8282\u8BBE\u8BA1\u3002</p><h3 id="\u7528\u4F8B\u56FE" tabindex="-1"><a class="header-anchor" href="#\u7528\u4F8B\u56FE" aria-hidden="true">#</a> \u7528\u4F8B\u56FE</h3><p>\u7528\u4F8B\u56FE\u901A\u8FC7\u53CD\u6620\u7528\u6237\u548C\u8F6F\u4EF6\u7CFB\u7EDF\u7684\u4EA4\u4E92\uFF0C\u63CF\u8FF0\u7CFB\u7EDF\u7684\u529F\u80FD\u9700\u6C42\u3002</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PxMzT0Oibf4ia9Fva7RU38ovpD2mCYXIm1cDQtmQibY0JasQqXzmH79ib1pj4WziajST03YL4yiaibKicVwy0ooono02lw/640?wx_fmt=png" alt=""></p><p>\u56FE\u4E2D\u5C0F\u4EBA\u5F62\u8C61\u7684\u5143\u7D20\uFF0C\u88AB\u79F0\u4E3A\u89D2\u8272\uFF0C\u89D2\u8272\u53EF\u4EE5\u662F\u4EBA\uFF0C\u4E5F\u53EF\u4EE5\u662F\u5176\u4ED6\u7684\u7CFB\u7EDF\u3002\u7CFB\u7EDF\u7684\u529F\u80FD\u53EF\u80FD\u4F1A\u5F88\u590D\u6742\uFF0C\u6240\u4EE5\u4E00\u5F20\u7528\u4F8B\u56FE\u53EF\u80FD\u53EA\u5305\u542B\u5176\u4E2D\u4E00\u5C0F\u90E8\u5206\u529F\u80FD\uFF0C\u8FD9\u4E9B\u529F\u80FD\u88AB\u4E00\u4E2A\u77E9\u5F62\u6846\u6846\u8D77\u6765\uFF0C\u8FD9\u4E2A\u77E9\u5F62\u6846\u88AB\u79F0\u4E3A\u7528\u4F8B\u7684\u8FB9\u754C\u3002\u6846\u91CC\u7684\u692D\u5706\u8868\u793A\u4E00\u4E2A\u4E00\u4E2A\u7684\u529F\u80FD\uFF0C\u529F\u80FD\u4E4B\u95F4\u53EF\u4EE5\u8C03\u7528\u4F9D\u8D56\uFF0C\u4E5F\u53EF\u4EE5\u8FDB\u884C\u529F\u80FD\u6269\u5C55\u3002</p><h3 id="\u72B6\u6001\u56FE" tabindex="-1"><a class="header-anchor" href="#\u72B6\u6001\u56FE" aria-hidden="true">#</a> \u72B6\u6001\u56FE</h3><p>\u72B6\u6001\u56FE\u7528\u6765\u5C55\u793A\u5355\u4E2A\u5BF9\u8C61\u751F\u547D\u5468\u671F\u7684\u72B6\u6001\u53D8\u8FC1\u3002</p><p>\u4E1A\u52A1\u7CFB\u7EDF\u4E2D\uFF0C\u5F88\u591A\u91CD\u8981\u7684\u9886\u57DF\u5BF9\u8C61\u90FD\u6709\u6BD4\u8F83\u590D\u6742\u7684\u72B6\u6001\u53D8\u8FC1\uFF0C\u6BD4\u5982\u8D26\u53F7\uFF0C\u6709\u521B\u5EFA\u72B6\u6001\u3001\u6FC0\u6D3B\u72B6\u6001\u3001\u51BB\u7ED3\u72B6\u6001\u3001\u6B20\u8D39\u72B6\u6001\u7B49\u7B49\u5404\u79CD\u72B6\u6001\u3002\u6B64\u5916\uFF0C\u7528\u6237\u3001\u8BA2\u5355\u3001\u5546\u54C1\u3001\u7EA2\u5305\u8FD9\u4E9B\u5E38\u89C1\u7684\u9886\u57DF\u6A21\u578B\u90FD\u6709\u591A\u79CD\u72B6\u6001\u3002</p><p>\u8FD9\u4E9B\u72B6\u6001\u7684\u53D8\u8FC1\u63CF\u8FF0\u53EF\u4EE5\u5728\u7528\u4F8B\u56FE\u4E2D\u7528\u6587\u5B57\u63CF\u8FF0\uFF0C\u968F\u7740\u89D2\u8272\u7684\u5404\u79CD\u64CD\u4F5C\u800C\u6539\u53D8\uFF0C\u4F46\u662F\u7528\u8FD9\u79CD\u65B9\u5F0F\u63CF\u8FF0\uFF0C\u72B6\u6001\u6563\u4E71\u5728\u5404\u5904\uFF0C\u4E0D\u8981\u8BF4\u5F00\u53D1\u7684\u65F6\u5019\u5BB9\u6613\u641E\u9519\uFF0C\u5C31\u662F\u4EA7\u54C1\u7ECF\u7406\u81EA\u5DF1\u5728\u8BBE\u8BA1\u7684\u65F6\u5019\uFF0C\u4E5F\u5BB9\u6613\u641E\u9519\u5BF9\u8C61\u7684\u72B6\u6001\u53D8\u8FC1\u3002</p><p>UML \u7684\u72B6\u6001\u56FE\u53EF\u4EE5\u5F88\u597D\u5730\u89E3\u51B3\u8FD9\u4E00\u95EE\u9898\uFF0C\u4E00\u5F20\u72B6\u6001\u56FE\u63CF\u8FF0\u4E00\u4E2A\u5BF9\u8C61\u751F\u547D\u5468\u671F\u7684\u5404\u79CD\u72B6\u6001\uFF0C\u53CA\u5176\u53D8\u8FC1\u7684\u5173\u7CFB\u3002\u5982\u56FE\u6240\u793A\uFF0C\u95E8\u7684\u72B6\u6001\u6709\u5F00 Opened\u3001\u5173 Closed \u548C\u9501 Locked \u4E09\u79CD\uFF0C\u72B6\u6001\u4E0E\u53D8\u8FC1\u5173\u7CFB\u7528\u4E00\u5F20\u72B6\u6001\u56FE\u5C31\u53EF\u4EE5\u641E\u5B9A\u3002</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PxMzT0Oibf4ia9Fva7RU38ovpD2mCYXIm19rM7gVEzyufk01L7xM6eKPybnYcUIEp1ndQg5GKB0GboU0iaVefb5Mg/640?wx_fmt=png" alt=""></p><h3 id="\u6D3B\u52A8\u56FE" tabindex="-1"><a class="header-anchor" href="#\u6D3B\u52A8\u56FE" aria-hidden="true">#</a> \u6D3B\u52A8\u56FE</h3><p>\u6D3B\u52A8\u56FE\u4E3B\u8981\u7528\u6765\u63CF\u8FF0\u8FC7\u7A0B\u903B\u8F91\u548C\u4E1A\u52A1\u6D41\u7A0B\u3002UML \u4E2D\u6CA1\u6709\u6D41\u7A0B\u56FE\uFF0C\u5F88\u591A\u65F6\u5019\uFF0C\u4EBA\u4EEC\u7528\u6D3B\u52A8\u56FE\u4EE3\u66FF\u6D41\u7A0B\u56FE\u3002</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PxMzT0Oibf4ia9Fva7RU38ovpD2mCYXIm1QdyA2cGvyDJwEAMIQicx3aS4zGafmtBFz9b7hgU6DYjj4FBUwQvxYWA/640?wx_fmt=png" alt=""></p><p>\u6D3B\u52A8\u56FE\u548C\u65E9\u671F\u6D41\u7A0B\u56FE\u7684\u56FE\u5F62\u5143\u7D20\u4E5F\u5F88\u63A5\u8FD1\uFF0C\u5B9E\u5FC3\u5706\u4EE3\u8868\u6D41\u7A0B\u5F00\u59CB\uFF0C\u7A7A\u5FC3\u5706\u4EE3\u8868\u6D41\u7A0B\u7ED3\u675F\uFF0C\u5706\u89D2\u77E9\u5F62\u8868\u793A\u6D3B\u52A8\uFF0C\u83F1\u5F62\u8868\u793A\u5206\u652F\u5224\u65AD\u3002</p><p>\u6B64\u5916\uFF0C\u6D3B\u52A8\u56FE\u5F15\u5165\u4E86\u4E00\u4E2A\u91CD\u8981\u7684\u6982\u5FF5\u2014\u2014\u6CF3\u9053\u3002\u6D3B\u52A8\u56FE\u53EF\u4EE5\u6839\u636E\u6D3B\u52A8\u7684\u8303\u56F4\uFF0C\u5C06\u6D3B\u52A8\u6839\u636E\u9886\u57DF\u3001\u7CFB\u7EDF\u548C\u89D2\u8272\u7B49\u5212\u5206\u5230\u4E0D\u540C\u7684\u6CF3\u9053\u4E2D\uFF0C\u4F7F\u6D41\u7A0B\u8FB9\u754C\u66F4\u52A0\u6E05\u6670\u3002</p><p>\u6211\u4EEC\u4E0A\u9762\u4ECB\u7ECD\u4E86 UML \u5EFA\u6A21\u5E38\u7528\u7684 7 \u79CD\u6A21\u578B\uFF0C\u90A3\u4E48\u8FD9 7 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UML 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b=p(h,[["render",t],["__file","jiagoushizenyanghuizhijitongjiagoulantu.html.vue"]]);export{b as default};
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src="https://mmbiz.qpic.cn/mmbiz_png/PxMzT0Oibf4ia9Fva7RU38ovpD2mCYXIm1AUopK9QQDr6pV5WBp5Nkp4JQRrZKBY4PkicgCj6kg4feC1wcW6U5mQw/640?wx_fmt=png" alt=""></p><h3 id="\u65F6\u5E8F\u56FE" tabindex="-1"><a class="header-anchor" href="#\u65F6\u5E8F\u56FE" aria-hidden="true">#</a> \u65F6\u5E8F\u56FE</h3><p>\u7C7B\u56FE\u4E4B\u5916\uFF0C\u53E6\u4E00\u79CD\u5E38\u7528\u7684\u56FE\u662F\u65F6\u5E8F\u56FE\uFF0C\u7C7B\u56FE\u63CF\u8FF0\u7C7B\u4E4B\u95F4\u7684\u9759\u6001\u5173\u7CFB\uFF0C\u65F6\u5E8F\u56FE\u5219\u7528\u6765\u63CF\u8FF0\u53C2\u4E0E\u8005\u4E4B\u95F4\u7684\u52A8\u6001\u8C03\u7528\u5173\u7CFB\u3002</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PxMzT0Oibf4ia9Fva7RU38ovpD2mCYXIm1EcAr3PticUpWHHw7DAczyFaHZVu2UXy8XQ3haOgqqzgYPXFDvfGMahA/640?wx_fmt=png" alt=""></p><h3 id="\u7EC4\u4EF6\u56FE" tabindex="-1"><a class="header-anchor" href="#\u7EC4\u4EF6\u56FE" aria-hidden="true">#</a> \u7EC4\u4EF6\u56FE</h3><p>\u7EC4\u4EF6\u662F\u6BD4\u7C7B\u7C92\u5EA6\u66F4\u5927\u7684\u8BBE\u8BA1\u5143\u7D20\uFF0C\u4E00\u4E2A\u7EC4\u4EF6\u4E2D\u901A\u5E38\u5305\u542B\u5F88\u591A\u4E2A\u7C7B\u3002\u7EC4\u4EF6\u56FE\u6709\u7684\u65F6\u5019\u548C\u5305\u56FE\u7684\u7528\u9014\u6BD4\u8F83\u63A5\u8FD1\uFF0C\u7EC4\u4EF6\u56FE\u901A\u5E38\u7528\u6765\u63CF\u8FF0\u7269\u7406\u4E0A\u7684\u7EC4\u4EF6\uFF0C\u6BD4\u5982\u4E00\u4E2A JAR\u3001\u4E00\u4E2A DLL \u7B49\u7B49\u3002\u5728\u5B9E\u8DF5\u4E2D\uFF0C\u6211\u4EEC\u8FDB\u884C\u6A21\u5757\u8BBE\u8BA1\u7684\u65F6\u5019\uFF0C\u7528\u5F97\u66F4\u591A\u7684\u5C31\u662F\u7EC4\u4EF6\u56FE\u3002</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PxMzT0Oibf4ia9Fva7RU38ovpD2mCYXIm1ge6DR9VNudpF79ic5ACNSaWfbc3MeL53PyYuxIwvibPoGicpibQsOXFZibQ/640?wx_fmt=png" alt=""></p><p>\u7EC4\u4EF6\u56FE\u63CF\u8FF0\u7EC4\u4EF6\u4E4B\u95F4\u7684\u9759\u6001\u5173\u7CFB\uFF0C\u4E3B\u8981\u662F\u4F9D\u8D56\u5173\u7CFB\uFF0C\u5982\u679C\u4F60\u60F3\u8981\u63CF\u8FF0\u7EC4\u4EF6\u4E4B\u95F4\u7684\u52A8\u6001\u8C03\u7528\u5173\u7CFB\uFF0C\u53EF\u4EE5\u4F7F\u7528\u7EC4\u4EF6\u65F6\u5E8F\u56FE\uFF0C\u4EE5\u7EC4\u4EF6\u4F5C\u4E3A\u53C2\u4E0E\u8005\uFF0C\u63CF\u8FF0\u7EC4\u4EF6\u4E4B\u95F4\u7684\u6D88\u606F\u8C03\u7528\u5173\u7CFB\u3002</p><h3 id="\u90E8\u7F72\u56FE" tabindex="-1"><a class="header-anchor" href="#\u90E8\u7F72\u56FE" aria-hidden="true">#</a> \u90E8\u7F72\u56FE</h3><p>\u90E8\u7F72\u56FE\u63CF\u8FF0\u8F6F\u4EF6\u7CFB\u7EDF\u7684\u6700\u7EC8\u90E8\u7F72\u60C5\u51B5\uFF0C\u6BD4\u5982\u9700\u8981\u90E8\u7F72\u591A\u5C11\u670D\u52A1\u5668\uFF0C\u5173\u952E\u7EC4\u4EF6\u90FD\u90E8\u7F72\u5728\u54EA\u4E9B\u670D\u52A1\u5668\u4E0A\u3002</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PxMzT0Oibf4ia9Fva7RU38ovpD2mCYXIm1Nj686l5iat4aaxb22dzibKUNNdn4fncgRnIjgicia3klrFmJUb4mh2yY2A/640?wx_fmt=png" alt=""></p><p>\u90E8\u7F72\u56FE\u662F\u8F6F\u4EF6\u7CFB\u7EDF\u6700\u7EC8\u7269\u7406\u5448\u73B0\u7684\u84DD\u56FE\uFF0C\u6839\u636E\u90E8\u7F72\u56FE\uFF0C\u6240\u6709\u76F8\u5173\u8005\uFF0C\u8BF8\u5982\u5BA2\u6237\u3001\u8001\u677F\u3001\u5DE5\u7A0B\u5E08\u90FD\u80FD\u6E05\u6670\u5730\u4E86\u89E3\u5230\u6700\u7EC8\u8FD0\u884C\u7684\u7CFB\u7EDF\u5728\u7269\u7406\u4E0A\u662F\u4EC0\u4E48\u6837\u5B50\uFF0C\u548C\u73B0\u6709\u7684\u7CFB\u7EDF\u670D\u52A1\u5668\u7684\u5173\u7CFB\uFF0C\u548C\u7B2C\u4E09\u65B9\u670D\u52A1\u5668\u7684\u5173\u7CFB\u3002\u6839\u636E\u90E8\u7F72\u56FE\uFF0C\u8FD8\u53EF\u4EE5\u4F30\u7B97\u670D\u52A1\u5668\u548C\u7B2C\u4E09\u65B9\u8F6F\u4EF6\u7684\u91C7\u8D2D\u6210\u672C\u3002</p><p>\u56E0\u6B64\u90E8\u7F72\u56FE\u662F\u6574\u4E2A\u8F6F\u4EF6\u8BBE\u8BA1\u6A21\u578B\u4E2D\uFF0C\u6BD4\u8F83\u5B8F\u89C2\u7684\u4E00\u79CD\u56FE\uFF0C\u662F\u5728\u8BBE\u8BA1\u65E9\u671F\u5C31\u9700\u8981\u753B\u7684\u4E00\u79CD\u6A21\u578B\u56FE\u3002\u6839\u636E\u90E8\u7F72\u56FE\uFF0C\u5404\u65B9\u53EF\u4EE5\u8BA8\u8BBA\u5BF9\u8FD9\u4E2A\u65B9\u6848\u662F\u5426\u8BA4\u53EF\u3002\u53EA\u6709\u5BF9\u90E8\u7F72\u56FE\u8FBE\u6210\u5171\u8BC6\uFF0C\u624D\u80FD\u7EE7\u7EED\u540E\u9762\u7684\u7EC6\u8282\u8BBE\u8BA1\u3002</p><h3 id="\u7528\u4F8B\u56FE" tabindex="-1"><a class="header-anchor" href="#\u7528\u4F8B\u56FE" aria-hidden="true">#</a> \u7528\u4F8B\u56FE</h3><p>\u7528\u4F8B\u56FE\u901A\u8FC7\u53CD\u6620\u7528\u6237\u548C\u8F6F\u4EF6\u7CFB\u7EDF\u7684\u4EA4\u4E92\uFF0C\u63CF\u8FF0\u7CFB\u7EDF\u7684\u529F\u80FD\u9700\u6C42\u3002</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PxMzT0Oibf4ia9Fva7RU38ovpD2mCYXIm1cDQtmQibY0JasQqXzmH79ib1pj4WziajST03YL4yiaibKicVwy0ooono02lw/640?wx_fmt=png" alt=""></p><p>\u56FE\u4E2D\u5C0F\u4EBA\u5F62\u8C61\u7684\u5143\u7D20\uFF0C\u88AB\u79F0\u4E3A\u89D2\u8272\uFF0C\u89D2\u8272\u53EF\u4EE5\u662F\u4EBA\uFF0C\u4E5F\u53EF\u4EE5\u662F\u5176\u4ED6\u7684\u7CFB\u7EDF\u3002\u7CFB\u7EDF\u7684\u529F\u80FD\u53EF\u80FD\u4F1A\u5F88\u590D\u6742\uFF0C\u6240\u4EE5\u4E00\u5F20\u7528\u4F8B\u56FE\u53EF\u80FD\u53EA\u5305\u542B\u5176\u4E2D\u4E00\u5C0F\u90E8\u5206\u529F\u80FD\uFF0C\u8FD9\u4E9B\u529F\u80FD\u88AB\u4E00\u4E2A\u77E9\u5F62\u6846\u6846\u8D77\u6765\uFF0C\u8FD9\u4E2A\u77E9\u5F62\u6846\u88AB\u79F0\u4E3A\u7528\u4F8B\u7684\u8FB9\u754C\u3002\u6846\u91CC\u7684\u692D\u5706\u8868\u793A\u4E00\u4E2A\u4E00\u4E2A\u7684\u529F\u80FD\uFF0C\u529F\u80FD\u4E4B\u95F4\u53EF\u4EE5\u8C03\u7528\u4F9D\u8D56\uFF0C\u4E5F\u53EF\u4EE5\u8FDB\u884C\u529F\u80FD\u6269\u5C55\u3002</p><h3 id="\u72B6\u6001\u56FE" tabindex="-1"><a class="header-anchor" href="#\u72B6\u6001\u56FE" aria-hidden="true">#</a> \u72B6\u6001\u56FE</h3><p>\u72B6\u6001\u56FE\u7528\u6765\u5C55\u793A\u5355\u4E2A\u5BF9\u8C61\u751F\u547D\u5468\u671F\u7684\u72B6\u6001\u53D8\u8FC1\u3002</p><p>\u4E1A\u52A1\u7CFB\u7EDF\u4E2D\uFF0C\u5F88\u591A\u91CD\u8981\u7684\u9886\u57DF\u5BF9\u8C61\u90FD\u6709\u6BD4\u8F83\u590D\u6742\u7684\u72B6\u6001\u53D8\u8FC1\uFF0C\u6BD4\u5982\u8D26\u53F7\uFF0C\u6709\u521B\u5EFA\u72B6\u6001\u3001\u6FC0\u6D3B\u72B6\u6001\u3001\u51BB\u7ED3\u72B6\u6001\u3001\u6B20\u8D39\u72B6\u6001\u7B49\u7B49\u5404\u79CD\u72B6\u6001\u3002\u6B64\u5916\uFF0C\u7528\u6237\u3001\u8BA2\u5355\u3001\u5546\u54C1\u3001\u7EA2\u5305\u8FD9\u4E9B\u5E38\u89C1\u7684\u9886\u57DF\u6A21\u578B\u90FD\u6709\u591A\u79CD\u72B6\u6001\u3002</p><p>\u8FD9\u4E9B\u72B6\u6001\u7684\u53D8\u8FC1\u63CF\u8FF0\u53EF\u4EE5\u5728\u7528\u4F8B\u56FE\u4E2D\u7528\u6587\u5B57\u63CF\u8FF0\uFF0C\u968F\u7740\u89D2\u8272\u7684\u5404\u79CD\u64CD\u4F5C\u800C\u6539\u53D8\uFF0C\u4F46\u662F\u7528\u8FD9\u79CD\u65B9\u5F0F\u63CF\u8FF0\uFF0C\u72B6\u6001\u6563\u4E71\u5728\u5404\u5904\uFF0C\u4E0D\u8981\u8BF4\u5F00\u53D1\u7684\u65F6\u5019\u5BB9\u6613\u641E\u9519\uFF0C\u5C31\u662F\u4EA7\u54C1\u7ECF\u7406\u81EA\u5DF1\u5728\u8BBE\u8BA1\u7684\u65F6\u5019\uFF0C\u4E5F\u5BB9\u6613\u641E\u9519\u5BF9\u8C61\u7684\u72B6\u6001\u53D8\u8FC1\u3002</p><p>UML \u7684\u72B6\u6001\u56FE\u53EF\u4EE5\u5F88\u597D\u5730\u89E3\u51B3\u8FD9\u4E00\u95EE\u9898\uFF0C\u4E00\u5F20\u72B6\u6001\u56FE\u63CF\u8FF0\u4E00\u4E2A\u5BF9\u8C61\u751F\u547D\u5468\u671F\u7684\u5404\u79CD\u72B6\u6001\uFF0C\u53CA\u5176\u53D8\u8FC1\u7684\u5173\u7CFB\u3002\u5982\u56FE\u6240\u793A\uFF0C\u95E8\u7684\u72B6\u6001\u6709\u5F00 Opened\u3001\u5173 Closed \u548C\u9501 Locked \u4E09\u79CD\uFF0C\u72B6\u6001\u4E0E\u53D8\u8FC1\u5173\u7CFB\u7528\u4E00\u5F20\u72B6\u6001\u56FE\u5C31\u53EF\u4EE5\u641E\u5B9A\u3002</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PxMzT0Oibf4ia9Fva7RU38ovpD2mCYXIm19rM7gVEzyufk01L7xM6eKPybnYcUIEp1ndQg5GKB0GboU0iaVefb5Mg/640?wx_fmt=png" alt=""></p><h3 id="\u6D3B\u52A8\u56FE" tabindex="-1"><a class="header-anchor" href="#\u6D3B\u52A8\u56FE" aria-hidden="true">#</a> \u6D3B\u52A8\u56FE</h3><p>\u6D3B\u52A8\u56FE\u4E3B\u8981\u7528\u6765\u63CF\u8FF0\u8FC7\u7A0B\u903B\u8F91\u548C\u4E1A\u52A1\u6D41\u7A0B\u3002UML \u4E2D\u6CA1\u6709\u6D41\u7A0B\u56FE\uFF0C\u5F88\u591A\u65F6\u5019\uFF0C\u4EBA\u4EEC\u7528\u6D3B\u52A8\u56FE\u4EE3\u66FF\u6D41\u7A0B\u56FE\u3002</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PxMzT0Oibf4ia9Fva7RU38ovpD2mCYXIm1QdyA2cGvyDJwEAMIQicx3aS4zGafmtBFz9b7hgU6DYjj4FBUwQvxYWA/640?wx_fmt=png" alt=""></p><p>\u6D3B\u52A8\u56FE\u548C\u65E9\u671F\u6D41\u7A0B\u56FE\u7684\u56FE\u5F62\u5143\u7D20\u4E5F\u5F88\u63A5\u8FD1\uFF0C\u5B9E\u5FC3\u5706\u4EE3\u8868\u6D41\u7A0B\u5F00\u59CB\uFF0C\u7A7A\u5FC3\u5706\u4EE3\u8868\u6D41\u7A0B\u7ED3\u675F\uFF0C\u5706\u89D2\u77E9\u5F62\u8868\u793A\u6D3B\u52A8\uFF0C\u83F1\u5F62\u8868\u793A\u5206\u652F\u5224\u65AD\u3002</p><p>\u6B64\u5916\uFF0C\u6D3B\u52A8\u56FE\u5F15\u5165\u4E86\u4E00\u4E2A\u91CD\u8981\u7684\u6982\u5FF5\u2014\u2014\u6CF3\u9053\u3002\u6D3B\u52A8\u56FE\u53EF\u4EE5\u6839\u636E\u6D3B\u52A8\u7684\u8303\u56F4\uFF0C\u5C06\u6D3B\u52A8\u6839\u636E\u9886\u57DF\u3001\u7CFB\u7EDF\u548C\u89D2\u8272\u7B49\u5212\u5206\u5230\u4E0D\u540C\u7684\u6CF3\u9053\u4E2D\uFF0C\u4F7F\u6D41\u7A0B\u8FB9\u754C\u66F4\u52A0\u6E05\u6670\u3002</p><p>\u6211\u4EEC\u4E0A\u9762\u4ECB\u7ECD\u4E86 UML \u5EFA\u6A21\u5E38\u7528\u7684 7 \u79CD\u6A21\u578B\uFF0C\u90A3\u4E48\u8FD9 7 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new file mode 100644
index 00000000..b68ecb71
--- /dev/null
+++ b/dist/assets/jianli.html.28361c8b.js
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new file mode 100644
index 00000000..76539b6f
--- /dev/null
+++ b/dist/assets/jianli.html.2cde4ea0.js
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alt="\u626B\u7801\u5173\u6CE8\u540E\u56DE\u590D\u300C\u7B80\u5386\u300D\u5173\u952E\u5B57"></p><p>\u8FD9\u4F4D\u5B66\u5F1F\u8BF4\u81EA\u5DF1\u5728\u79CB\u62DB\u7684\u65F6\u5019\u6CA1\u7528\u5FC3\u627E\u5DE5\u4F5C\uFF0C\u7B49\u6BD5\u4E1A\u540E\u624D\u53D1\u73B0\u627E\u7684\u5DE5\u4F5C\u4E0D\u6EE1\u610F\uFF0C\u52C9\u5F3A\u5E72\u4E86\u534A\u5E74\u5C31\u4E0D\u60F3\u5E72\u4E86\uFF0C\u7136\u540E\u8D70\u7684\u793E\u62DB\uFF0C\u53D1\u73B0\u793E\u62DB\u6BD4\u6821\u62DB\u8981\u96BE\u4E00\u70B9\u3002</p><p>\u5728\u6B63\u5F0F\u5206\u4EAB\u7B80\u5386\u4FEE\u6539\u6848\u4F8B\u524D\uFF0C\u4E8C\u54E5\u5148\u7B80\u5355\u603B\u7ED3\u4E00\u4E0B\u6821\u62DB\u548C\u793E\u62DB\u5427\u3002</p><p><strong>\u6821\u62DB\u770B\u57FA\u7840\u3001\u6F5C\u529B\uFF0C\u793E\u62DB\u770B\u80FD\u529B\u3001\u5373\u6218\u529B</strong>\u3002</p><p><strong>\u6821\u62DB</strong>\uFF0C\u5BF9\u4E8E\u67D0\u4E9B\u6280\u672F\u95EE\u9898\u4F60\u53EF\u4EE5\u4E0D\u61C2\u4E0D\u4F1A\uFF0C\u6CA1\u5173\u7CFB\uFF0C\u770B\u7684\u662F\u4F60\u7684\u6F5C\u529B\uFF0C\u4F60\u7684\u57FA\u672C\u529F\u3002\u6846\u67B6\u4E0D\u4F1A\uFF1F\u6CA1\u4E8B\uFF0C\u5B66\u5C31\u662F\u4E86\u3002</p><p><strong>\u793E\u62DB</strong>\uFF0C\u5E76\u4E0D\u662F\u7684\uFF0C\u793E\u62DB\u770B\u7684\u662F\u4F60\u7684\u8FC7\u5F80\u7ECF\u5386\u4EE5\u53CA\u4F60\u89E3\u51B3\u95EE\u9898\u7684\u80FD\u529B\u3002\u4EBA\u5BB6\u62DB\u4F60\u8FC7\u6765\u662F\u9700\u8981\u4F60\u6765\u5E72\u6D3B\u7684\uFF0C\u4E0D\u662F\u8BA9\u4F60\u6765\u5E26\u85AA\u5B66\u4E60\u7684\uFF0C\u516C\u53F8\u53C8\u4E0D\u662F\u6148\u5584\u673A\u6784\u554A\u3002</p><p>\u6240\u4EE5\u5E0C\u671B\u8FD8\u662F\u5728\u6821\u7684\u5B66\u5F1F\u5B66\u59B9\u4EEC\u597D\u597D\u5B66\u5B66\u8BA1\u7B97\u673A\u57FA\u672C\u529F\uFF0C\u6253\u6253\u57FA\u7840\u3002</p><p>\u7A0B\u5E8F\u5458\u5185\u529F\u662F\u5F88\u91CD\u8981\u7684\uFF0C\u6BD4\u5982\u64CD\u4F5C\u7CFB\u7EDF\u3001\u8BA1\u7B97\u673A\u7F51\u7EDC\u3001\u6570\u636E\u5E93\u3001\u8BA1\u7B97\u673A\u7EC4\u6210\u539F\u7406\u8FD9\u4E9B\u3002</p><p>\u597D\u4E86\uFF0C\u5E9F\u8BDD\u4E0D\u591A\u8BF4\uFF0C\u5F00\u59CB\u4ECA\u5929\u7684\u4E3B\u9898\u5427\u3002</p><p>\u4EE5\u4E0B\u5185\u5BB9\u6D89\u53CA\u5230\u8FD9\u4F4D\u5B66\u5F1F\u7684\u4E00\u4E9B\u5173\u952E\u4FE1\u606F\u5DF2\u8131\u654F\uFF0C\u4E0D\u5F71\u54CD\u5927\u5BB6\u9605\u8BFB\uFF0C\u6211\u6309\u7167\u4FEE\u6539\u6A21\u5757\u7ED9\u5927\u5BB6\u5206\u4EAB\u3002</p><h3 id="\u4E13\u4E1A\u6280\u80FD" tabindex="-1"><a class="header-anchor" href="#\u4E13\u4E1A\u6280\u80FD" aria-hidden="true">#</a> \u4E13\u4E1A\u6280\u80FD</h3><p>\u9996\u5148\u6765\u770B\u4E00\u4E0B\u8FD9\u4F4D\u5B66\u5F1F\u7684\u4E13\u4E1A\u6280\u80FD\u90E8\u5206\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/download/jianli-2c93d164-55f7-4d2f-b0d0-f0857644a265.jpg" alt=""></p><p>\u5176\u5B9E\uFF0C\u8FD9\u90E8\u5206\u4ED6\u5199\u7684\u5DF2\u7ECF\u633A\u597D\u7684\u4E86\uFF0C\u7B80\u5355\u5927\u65B9\u3001\u6761\u7406\u6E05\u6670\u3002</p><p>\u4E5F\u80FD\u4ECE\u4ED6\u7684\u4E13\u4E1A\u6280\u80FD\u63CF\u8FF0\u770B\u51FA\u6765\u8FD9\u4F4D\u5B66\u5F1F\u633A\u5389\u5BB3\u7684\uFF0C\u53EF\u8FD8\u662F\u6709\u4E9B\u4E0D\u8DB3\u4E4B\u5904\uFF0C\u6211\u4E5F\u60F3\u76F8\u5E94\u7684\u7ED9\u51FA\u4E86\u4E00\u4E9B\u5EFA\u8BAE\u548C\u610F\u89C1\u3002</p><p><strong>\u4FEE\u6539\u610F\u89C1</strong></p><p>1\u3001<strong>\u7F16\u7A0B\u8BED\u8A00</strong>\u90E8\u5206\u7684\u7B2C\u4E00\u53E5\u8BDD\u6211\u5EFA\u8BAE\u4ED6\u6539\u4E00\u4E0B\uFF0C\u56E0\u4E3A\u539F\u6587\u8BF4\u7684\u6709\u70B9\u5197\u4F59\u3002\u6211\u5EFA\u8BAE\u4ED6\u6539\u6210\u201C\u719F\u6089C++\u7F16\u7A0B\u8BED\u8A00\uFF0C\u57FA\u672C\u529F\u624E\u5B9E\uFF0C\u719F\u7EC3\u638C\u63E1STL\u6A21\u677F\u5E93\u201D\u3002</p><p>\u540E\u9762\u7684\u201C\u9605\u8BFB\u6E90\u7801\u201D\u6211\u5EFA\u8BAE\u662F\u4E0D\u52A0\u7684\uFF0C\u56E0\u4E3ASTL\u4E0B\u7684\u601D\u60F3\u786E\u5B9E\u6BD4\u8F83\u7CBE\u5999\uFF0C\u5982\u679C\u522B\u4EBA\u6293\u4F4F\u4F60\u7684\u201C\u9605\u8BFB\u8FC7\u90E8\u5206\u6E90\u7801\u201D\u8FD9\u51E0\u4E2A\u5B57\u4F7F\u52B2\u95EE\u4F60\uFF0C\u5341\u6709\u516B\u4E5D\u8981\u5403\u4E0D\u6D88\uFF0C\u4FDD\u9669\u8D77\u89C1\u8FD8\u662F\u4E0D\u8981\u52A0\u4E0A\u4E3A\u597D\u3002\u4F60\u9700\u8981\u5BF9\u4F60\u7B80\u5386\u4E0A\u7684\u6BCF\u4E00\u4E2A\u5B57\uFF0C\u6216\u8005\u8BF4\u6BCF\u4E00\u4E2A\u6807\u70B9\u7B26\u53F7\u8D1F\u8D23\u3002</p><p>2\u3001<strong>\u6570\u636E\u7ED3\u6784</strong>\u90E8\u5206\uFF0C\u5176\u5B9E\u4ED6\u5199\u7684\u633A\u597D\u7684\u4E86\uFF0C\u6211\u5EFA\u8BAE\u4ED6\u5199\u5F97\u66F4\u7CBE\u70BC\u5177\u4F53\u4E00\u70B9\uFF0C<strong>\u5C06\u539F\u6587</strong>\u201C \xA0\u719F\u6089\u5E38\u7528\u7B97\u6CD5(Leetcode 200\u9053)\u3001\u6570\u636E\u7ED3\u6784 (\u94FE\u8868\u3001\u6808\u3001\u961F\u5217\u3001\u54C8\u5E0C\u8868\u3001\u4E8C\u53C9\u6811\u3001B/B+\u6811\u3001\u7EA2\u9ED1\u6811\u7B49) \xA0\u201D<strong>\u6539\u4E3A</strong>\u201C\u719F\u6089\u5E38\u89C1\u6570\u636E\u7ED3\u6784\u4E0E\u7B97\u6CD5\uFF0C\u5982\u94FE\u8868\u3001\u6808\u3001\u54C8\u5E0C\u8868\u3001\u4E8C\u53C9\u6811\u7B49\uFF0C\u4EE574%\u6B63\u786E\u7387\u901A\u8FC7\u529B\u6263\u7F51\u7AD9 214 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\xA0\u719F\u6089 MySQL \u5173\u7CFB\u578B\u6570\u636E\u5E93\u3001Redis \u975E\u5173\u7CFB\u578B\u6570\u636E\u5E93\uFF0C\u4E86\u89E3 MySQL \u67E5\u8BE2\u6027\u80FD\u4F18\u5316\u76F8\u5173\u6280\u672F\uFF0CRedis \u4E94\u5927\u6570\u636E\u7C7B\u578B\uFF0C\u6301\u4E45\u5316\u673A\u5236\u4EE5\u53CA\u4E3B\u4ECE\u590D\u5236\u6280\u672F \xA0\u201D\u8FD9\u5C31\u76F8\u5F53\u4E8E\u76F4\u63A5\u8BA9\u9762\u8BD5\u5B98\u95EE\u4F60Redis\u7684\u4E94\u79CD\u6570\u636E\u7ED3\u6784\u662F\u4EC0\u4E48\uFF1F\u6301\u4E45\u5316\u3001\u4E3B\u4ECE\u590D\u5236\u53C8\u662F\u4EC0\u4E48\u4E86\uFF1F</p><p>\u9762\u8BD5\u5B98\u53C8\u4E0D\u662F\u50BB\u5B50...</p><p>\u6211\u5EFA\u8BAE\u4ED6\u6539\u6210\u201C\u719F\u6089\u5173\u7CFB\u578B\u6570\u636E\u5E93MySQL\u3001\u5185\u5B58\u578B\u6570\u636E\u5E93Redis\uFF0C\u4E86\u89E3\u5E38\u89C1\u67E5\u8BE2\u4F18\u5316\u6280\u672F\u3002\u201D\u8FD9\u6837\u7A0D\u5FAE\u59D4\u5A49\u4E00\u4E9B\u3002\u3002\u3002</p><p>\u4E0B\u9762\u662F\u6211\u5F53\u65F6\u7ED9\u4ED6\u7684\u4FEE\u6539\u610F\u89C1\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/download/jianli-f5c60946-3cdd-4ac6-9e20-8360808f8612.jpg" alt=""></p><h3 id="\u9879\u76EE\u7ECF\u5386" tabindex="-1"><a class="header-anchor" href="#\u9879\u76EE\u7ECF\u5386" aria-hidden="true">#</a> \u9879\u76EE\u7ECF\u5386</h3><p>\u5176\u5B9E\u4E00\u4EFD\u6821\u62DB\u7B80\u5386\uFF0C\u6700\u91CD\u8981\u7684\u5C31\u662F\u9879\u76EE\u7ECF\u5386\u3001\u5B9E\u4E60\u7ECF\u5386\uFF08\u6709\u5219\u52A0\u5206\uFF0C\u6CA1\u6709\u4E5F\u884C\uFF09\u3001\u4E13\u4E1A\u6280\u80FD\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/download/jianli-a715eaa8-86c5-41ce-aee7-cd1873e2eec8.jpg" alt=""></p><p>\u53EF\u4EE5\u4ECE\u8FD9\u4F4D\u5B66\u5F1F\u7684\u63CF\u8FF0\u4E2D\u770B\u51FA\u6765\uFF0C\u4ED6\u6BD5\u4E1A\u540E\u7684\u8FD9\u56DB\u4E2A\u6708\u91CC\u786E\u5B9E\u505A\u4E86\u4E0D\u5C11\u7684\u5DE5\u4F5C\uFF0C\u4F46\u611F\u89C9\u6CA1\u8BF4\u51FA\u6765\u81EA\u5DF1\u6240\u505A\u5DE5\u4F5C\u7684\u610F\u4E49\u548C\u96BE\u70B9\u6240\u5728\u3002</p><p>\u4F60\u53EF\u80FD\u89C9\u5F97\u6CA1\u4EC0\u4E48\uFF0C\u4F46\u90A3\u624D\u662F\u9762\u8BD5\u5B98\u5728\u610F\u7684\u5730\u65B9\u3002</p><p>\u8BBE\u8EAB\u5904\u5730\u7684\u60F3\uFF0C\u5982\u679C\u4F60\u662F\u4E00\u4E2A\u9762\u8BD5\u5B98\uFF0C\u4F60\u4E5F\u5E0C\u671B\u62DB\u6765\u7684\u65B0\u9C9C\u8840\u6DB2\u80FD\u529B\u8D8A\u5F3A\u8D8A\u597D\u3002\u90A3\u80FD\u529B\u5F3A\u4E0D\u5F3A\u5728\u9762\u8BD5\u521D\u671F\u5C31\u662F\u901A\u8FC7\u4F60\u7684\u5B9E\u4E60\u7ECF\u5386\u6216\u8005\u9879\u76EE\u7ECF\u9A8C\u4F53\u73B0\u7684\u554A\u3002</p><p><strong>\u9488\u5BF9\u7B2C\u4E00\u4E2A\u9879\u76EE\uFF0C\u4E8C\u54E5\u7ED9\u51FA\u4E86\u51E0\u70B9\u4FEE\u6539\u610F\u89C1</strong>\uFF1A</p><p>1\u3001\u4E00\u4E2A\u9879\u76EE\uFF0C\u4F60\u627F\u62C5\u7684\u89D2\u8272\u662F\u4EC0\u4E48\uFF1F\u4E3B\u8981\u8D1F\u8D23\u4EBA\u8FD8\u662F\u6838\u5FC3\u6210\u5458\uFF1F\u5305\u62EC\u9879\u76EE\u7684\u8D77\u59CB\u65F6\u95F4\u8981\u6CE8\u660E\u3002</p><p>2\u3001\u5BF9\u4E8E\u5176\u4E2D\u7684\u6570\u636E\u5E93\u5BC6\u7801\u9A8C\u8BC1\u3002\u6211\u5EFA\u8BAE\u4ED6\u53BB\u6389\uFF0C\u56E0\u4E3A\u6709\u70B9\u6C34\u5E73\u8F83\u4F4E\uFF0C\u8FD8\u4E0D\u5982\u4E0D\u5199\u3002\u867D\u8BF4\u540E\u7AEF\u90FD\u662F\u589E\u5220\u6539\u67E5\uFF0C\u4F46\u4F60\u4E0D\u80FD\u76F4\u63A5\u8BF4\u4F60\u5C31\u662F\u641E\u4E86\u4E2A\u5BC6\u7801\u9A8C\u8BC1\u554A\uFF0C\u4F60\u8FD9\u4E5F\u592A\u803F\u76F4\u4E86\u5427\u3002</p><p>3\u3001\u6280\u672F\u4EAE\u70B9\u90E8\u5206\u63CF\u8FF0\u4E0D\u591F\u6E05\u695A\uFF0C\u867D\u7136\u8FD9\u4F4D\u5B66\u5F1F\u505A\u4E86\u5F88\u591A\u5DE5\u4F5C\uFF0C\u53EF\u4ECE\u4ED6\u7684\u63CF\u8FF0\u4E2D\u662F\u770B\u4E0D\u51FA\u6765\u4EC0\u4E48\u5DE5\u4F5C\u7684\uFF0C\u6211\u7ED9\u4ED6\u6362\u4E86\u4E00\u79CD\u8BF4\u6CD5\u3002</p><p><strong>\u6280\u672F\u4EAE\u70B9\u539F\u6587\u63CF\u8FF0</strong>\uFF1A</p><p>\u5B9E\u73B0\u4E0E bash \u51E0\u4E4E\u5B8C\u5168\u76F8\u540C\u7684 cd \u529F\u80FD\uFF1B\u4F7F\u7528\u8FB9\u7F18\u89E6\u53D1\u4F18\u5316 epoll \u9891\u7E41\u54CD\u5E94\uFF0C\u4F7F\u7528\u8FDB\u7A0B\u6C60\u4E0E\u7EBF\u7A0B\u6C60\u51CF\u5C11 CPU \u8FD0\u8F6C\u8D1F\u8F7D\uFF1B\u8D85\u65F6\u65AD\u5F00\uFF0C\u9488\u5BF9\u8FDE\u63A5\u4E0A\u7684\u5BA2\u6237\u7AEF\uFF0C\u82E5\u8D85\u8FC7 30 \u79D2\u672A\u53D1\u9001\u4EFB\u4F55\u8BF7\u6C42\uFF0C\u65AD\u5F00\u8FDE\u63A5\uFF0C\u5E76\u4F7F\u7528\u73AF\u5F62\u961F\u5217\u6280\u672F\u5B9E\u73B0\u9AD8\u5E76\u53D1 \xA0\uFF1B</p><p>\u5176\u5B9E\u4ED6\u5199\u7684\u633A\u597D\u7684\u4E86\uFF0C\u4F46\u6211\u8FD8\u662F\u89C9\u5F97\u5DEE\u70B9\u610F\u601D\uFF0C\u5C31\u662F\u8BF4\u7684\u592A\u767D\u8BDD\u4E86\u4E00\u4E9B\uFF0C\u6240\u4EE5\u6211\u7528\u81EA\u5DF1\u7684\u8BED\u8A00\u5E2E\u4ED6\u52A0\u5DE5\u6DA6\u8272\u4E86\u4E00\u4E0B\uFF0C\u4E0B\u9762\u662F\u6211\u7684\u4FEE\u6539\u7248\u3002</p><p><strong>\u6280\u672F\u4EAE\u70B9\u4FEE\u6539\u7248</strong>\uFF1A</p><p>1\u3001\u5B9E\u73B0\u4E0E bash \u51E0\u4E4E\u5B8C\u5168\u76F8\u540C\u7684 cd 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src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/download/jianli-5b6ff7c0-c8ad-4874-8ee8-7593e3ee1f5f.jpg" alt=""></p><p>\u81F3\u6B64\uFF0C\u5E2E\u4ED6\u628A\u7B2C\u4E00\u4E2A\u9879\u76EE\u4FEE\u6539\u5B8C\u6BD5\u4E86\uFF0C<strong>\u9488\u5BF9\u7B2C\u4E8C\u4E2A\u9879\u76EE\u7684\u4FEE\u6539</strong>\uFF0C\u6211\u5C31\u4E0D\u591ABB\u4E86\uFF0C\u76F4\u63A5\u8D34\u4E0A\u6765\u5427\u3002</p><p><strong>\u4EE5\u4E0B\u662F\u6211\u7ED9\u51FA\u7684\u4FEE\u6539\u610F\u89C1</strong>\uFF1A</p><p>\u8FD9\u4E2A\u9879\u76EE\u540D\u6539\u6210\uFF1A\u6C7D\u8F66\u51FA\u884CAPP \u7F3A\u5C11\u4F60\u7684\u89D2\u8272 \u548C \u9879\u76EE\u8D77\u59CB\u65F6\u95F4 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src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/download/jianli-f2aec848-d462-491b-9fe1-7d939ea16ed8.jpg" alt=""></p><p>\u5176\u5B9E\u5BF9\u4E8E\u8BE5\u90E8\u5206\u7684\u4FEE\u6539\uFF0C\u6211\u662F\u7D27\u7D27\u6293\u4F4F\u4E00\u4E2A\u8981\u70B9\uFF0C\u90A3\u5C31\u662F\u5C3D\u53EF\u80FD\u4F7F\u7528\u5177\u5316\u7684\u6307\u6807\u5373\u660E\u786E\u7684\u4FE1\u606F\u800C\u4E0D\u662F\u6982\u62EC\u6027\u7684\u63CF\u8FF0\u3002</p><p>\u6BD4\u5982\u76F4\u63A5\u544A\u8BC9\u522B\u4EBA\u63D0\u5347\u4E86XX%\uFF0C\u800C\u4E0D\u662F\u8BF4\u4E00\u53E5\u201C\u6709\u7740\u8F83\u597D\u7684\u63D0\u5347\u6548\u679C\u201D\uFF1B\u76F4\u63A5\u544A\u8BC9\u522B\u4EBA\u201C\u9879\u76EE\u4F18\u5316\u4E86XX\u79D2\uFF0C\u76F8\u8F83\u4E8E\u4E0A\u4E00\u7248\u672C\u901F\u5EA6\u52A0\u5FEB\u4E86XX%\u201D\uFF0C\u800C\u4E0D\u662F\u201D\u7ECF\u8FC7XX\u6280\u672F\uFF0C\u901F\u5EA6\u6709\u4E86\u8F83\u5927\u63D0\u9AD8\u201C\u3002</p><p>\u8FD9\u4E00\u70B9\uFF0C\u6211\u5728\u81EA\u5DF1\u7684\u7B80\u5386\u4FEE\u6539\u8FED\u4EE3\u6587\u7AE0\u4E2D\u4E5F\u63D0\u5230\u8FC7\uFF0C\u5F88\u91CD\u8981\uFF0C\u7279\u522B\u91CD\u8981\uFF0C\u5177\u5316\u7684\u6307\u6807\u4FE1\u606F\u7ED9\u4EBA\u7684\u7B2C\u4E00\u611F\u89C9\u5C31\u662F\u4E0D\u4E00\u6837\u7684\u3002</p><h3 id="\u5DE5\u4F5C\u7ECF\u5386\u3001\u6559\u80B2\u7ECF\u5386\u3001\u5956\u9879\u8BC1\u4E66" tabindex="-1"><a class="header-anchor" href="#\u5DE5\u4F5C\u7ECF\u5386\u3001\u6559\u80B2\u7ECF\u5386\u3001\u5956\u9879\u8BC1\u4E66" aria-hidden="true">#</a> \u5DE5\u4F5C\u7ECF\u5386\u3001\u6559\u80B2\u7ECF\u5386\u3001\u5956\u9879\u8BC1\u4E66</h3><p>\u8FD9\u91CC\u6BD4\u8F83\u7C7B\u4F3C\uFF0C\u6211\u5C31\u4E00\u8D77\u653E\u4E0A\u6765\u8BF4\u4E86</p><p>\u9996\u5148\u662F\u539F\u6587\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/download/jianli-eabee6e7-0fcf-4fb7-9ca8-0ada1c604acf.jpg" alt=""></p><p>\u6211\u7ED9\u7684\u4FEE\u6539\u610F\u89C1\u6279\u6CE8\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/download/jianli-bb7279ad-dd46-47ea-8f13-37d5caaf404e.jpg" alt=""></p><p>1\u3001\u5728\u5DE5\u4F5C\u7ECF\u5386\u8FD9\u91CC\uFF0C\u6CE8\u610F\u7EC6\u8282\u95EE\u9898\uFF0C\u6BD4\u5982\u4F60\u7684\u5C97\u4F4D\u540D\u79F0\u662F\u4EC0\u4E48\uFF1F\u4F60\u5728\u5B9E\u4E60\u8FC7\u7A0B\u4E2D\uFF0C\u4F60\u7684\u5DE5\u4F5C\u6709\u54EA\u4E9B\uFF1F\u5728\u8FD9\u8FC7\u7A0B\u4E2D\u7528\u5230\u4E86\u54EA\u4E9B\u6280\u80FD\uFF1F</p><p>\u4E0D\u8981\u76F4\u63A5\u5C31\u662F\u4E00\u53E5\u8BDD\u5199\u51FA\u6765\uFF0C\u4E0D\u660E\u4E0D\u767D\u7684\uFF0C\u6CA1\u4EC0\u4E48\u613F\u610F\u770B\u7684\u3002\u4EBA\u90FD\u662F\u89C6\u89C9\u52A8\u7269\uFF0C\u90FD\u5E0C\u671B\u770B\u5230\u6574\u9F50\u6709\u5E8F\u7684\u5185\u5BB9\u3002</p><p>\u8FD9\u91CC\u7684\u6574\u9F50\u6709\u5E8F\u4E0D\u4EC5\u8981\u6C42\u4F60\u7684\u6392\u7248\u6574\u9F50\uFF0C\u4F60\u60F3\u8981\u8868\u8FBE\u7684\u610F\u601D\u4E5F\u8981\u6709\u5E8F\u3002</p><p>\u6BD4\u5982\u628A\u4F60\u7684\u5DE5\u4F5C\u6216\u8005\u5B9E\u4E60\u5206\u4E3A\u56E2\u961F\u5DE5\u4F5C\u3001\u4E2A\u4EBA\u5DE5\u4F5C\u3001\u4E2A\u4EBA\u6536\u83B7\uFF0C\u6328\u4E2A\u5C55\u5F00\u3002</p><p>2\u3001\u7531\u4E8E\u8FD9\u4F4D\u5B66\u5F1F\u5DF2\u7ECF\u6BD5\u4E1A\u4E86\uFF0C\u5DF2\u7ECF\u4E0D\u80FD\u518D\u4EE5\u6821\u62DB\u8EAB\u4EFD\u53BB\u9762\u8BD5\u627E\u5DE5\u4F5C\u4E86\uFF0C\u6240\u4EE5\u6559\u80B2\u7ECF\u5386\u8FD9\u91CC\u5176\u5B9E\u5DF2\u7ECF\u6CA1\u5FC5\u8981\u5199\u5728\u6821\u5B66\u4E60\u7684\u8BFE\u7A0B\u4E86\u3002</p><p>\u4E00\u65E6\u4F60\u8E0F\u5165\u793E\u4F1A\uFF0C\u5931\u53BB\u4E86\u5E94\u5C4A\u751F\u8EAB\u4EFD\u4F60\u5C31\u4E0D\u518D\u662F\u6821\u62DB\u751F\u4E86\uFF0C\u8FD9\u4E2A\u65F6\u5019\u770B\u7684\u5C31\u662F\u4F60\u7684\u80FD\u529B\u4E86\u3002</p><p>3\u3001\u5BF9\u4E8E\u4E00\u4E9B\u7EC6\u8282\u95EE\u9898\u8BB0\u5F97\u505A\u597D\uFF0C\u5173\u952E\u5B57\u8BE5\u52A0\u7C97\u52A0\u7C97\u3002\u6BD4\u5982\u6709\u5206\u91CF\u7684\u56FD\u5956\u8FD8\u662F\u503C\u5F97\u4E00\u4E2A\u52A0\u7C97\u663E\u793A\u7684\u3002</p><p>4\u3001\u5982\u679C\u4F60\u8FC7\u4E86\u516D\u7EA7\uFF0C\u90A3\u76F4\u63A5\u5199<strong>\u516D\u7EA7</strong>\uFF0C\u5206\u6570\u8FD8\u53EF\u4EE5\u7684\u8BDD\u5C31\u5199\u4E0A\u5206\u6570\uFF1B\u5206\u6570\u6BD4\u8F83\u4F4E\u7684\u8BDD\uFF0C\u6BD4\u5982430\u8FD9\u79CD\u521A\u98D8\u8FC7\uFF0C\u5C31\u5199\u516D\u7EA7\u5C31\u884C\u3002</p><p>\u5982\u679C\u516D\u7EA7\u6CA1\u8FC7\uFF0C\u90A3\u5C31\u5199\u4E0A\u56DB\u7EA7\u5427\u3002</p><h3 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alt="\u626B\u7801\u5173\u6CE8\u540E\u56DE\u590D\u300C\u7B80\u5386\u300D\u5173\u952E\u5B57"></p><p>\u8BB0\u4F4F\uFF01\u7B80\u5386\u5E76\u4E0D\u662F\u5355\u7EAF\u610F\u4E49\u4E0A\u7684\u81EA\u6211\u4ECB\u7ECD\uFF0C\u6BD4\u5982\u8BF4\u6211\u662F\u6C89\u9ED8\u738B\u4E8C\uFF0C\u4ECA\u5E74 18 \u5C81\uFF0C\u6765\u81EA\u6D1B\u9633\uFF0C\u6BD5\u4E1A\u4E8E\u67D0\u67D0\u5B66\u6821\u3002\u8FD9\u6837\u7684\u7B80\u5386\u592A\u82CD\u767D\u4E86\u3002</p><p>\u7B80\u5386\u5C31\u597D\u50CF\u7535\u68AF\u5E7F\u544A\u7684\u5355\u9875\u4E00\u6837\uFF0C\u5B83\u5BCC\u6709\u9C9C\u6D3B\u7684\u751F\u547D\u529B\uFF0C\u5B83\u5728\u5450\u558A\uFF0C\u5B83\u4E0D\u9700\u8981\u8FC7\u591A\u7684\u6DA6\u8272\uFF0C\u53EA\u9700\u8981\u94FF\u9535\u6709\u529B\u3001\u8D64\u88F8\u88F8\u7684\u201C\u70AB\u8000\u201D\u3002</p><p>\u6BD4\u5982\u8BF4\u6211\u662F\u6C89\u9ED8\u738B\u4E8C\uFF0C 2019 \u5E74\u53C2\u4E0E\u4E86 XXX \u9879\u76EE\u7684\u5F00\u53D1\u3002\u4F5C\u4E3A\u9879\u76EE\u56E2\u961F\u7684\u6838\u5FC3 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noreferrer"},l=e("https://mp.weixin.qq.com/s/soVldFzBbqwm_vM35afFvg");function h(m,j){const t=o("ExternalLinkIcon");return r(),n("div",null,[d,p("blockquote",null,[p("p",null,[i,p("a",b,[l,s(t)])])])])}var _=a(c,[["render",h],["__file","jianli.html.vue"]]);export{_ as default};
diff --git a/dist/assets/jianli.html.5f109d9a.js b/dist/assets/jianli.html.5f109d9a.js
deleted file mode 100644
index bc012846..00000000
--- a/dist/assets/jianli.html.5f109d9a.js
+++ /dev/null
@@ -1 +0,0 @@
-import{_ as a}from"./plugin-vue_export-helper.21dcd24c.js";import{r as o,o as r,c as n,a as p,b as s,e as g,d as e}from"./app.a0271b9c.js";const c={},d=g('<p>\u5927\u5BB6\u597D\uFF0C\u6211\u662F\u4E8C\u54E5\u5440\u3002</p><p>\u968F\u7740\u6821\u62DB\u5B63\u7684\u5230\u6765\uFF0C\u4E0D\u5C11\u540C\u5B66\u90FD\u51C6\u5907\u627E\u5DE5\u4F5C\u4E86\uFF0C\u4E5F\u9646\u9646\u7EED\u7EED\u6709\u540C\u5B66\u627E\u6211\u770B\u7B80\u5386\u4EE5\u53CA\u4FEE\u6539\u7B80\u5386\u3002</p><p>\u5176\u5B9E\u6211\u4EE5\u524D\u5C31\u5206\u4EAB\u8FC7\u81EA\u5DF1\u7684\u7B80\u5386\u5199\u6CD5\u548C\u8FED\u4EE3\u5B8C\u5584\u7684\u8FC7\u7A0B\uFF0C\u53EF\u80FD\u6709\u540C\u5B66\u6CA1\u6765\u5F97\u53CA\u770B\u3002\u4ECA\u5929\u5BA2\u6237\u4ECE\u957F\u6C99\u8FDC\u9053\u800C\u6765\uFF0C\u6211\u8981\u63A5\u5F85\uFF0C\u6240\u4EE5\u6CA1\u65F6\u95F4\u81EA\u5DF1\u5199\u4E86\uFF0C\u5C31\u8F6C\u4E00\u7BC7\u963F\u79C0\u7684\u6587\u7AE0\u7ED9\u5927\u5BB6\u53C2\u7167\u4E0B\u3002</p><p>\u9700\u8981\u7B80\u5386\u6A21\u677F\u7684\u5C0F\u4F19\u4F34\u8BF7\u626B\u63CF\u4E0B\u65B9\u7684\u4E8C\u7EF4\u7801\u5173\u6CE8\u4F5C\u8005\u7684\u539F\u521B\u516C\u4F17\u53F7\u300C<strong>\u6C89\u9ED8\u738B\u4E8C</strong>\u300D\u56DE\u590D\u5173\u952E\u5B57\u300C<strong>\u7B80\u5386</strong>\u300D\u5C31\u53EF\u4EE5\u62C9\u53D6\u5230\u4E0B\u8F7D\u94FE\u63A5\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongzhonghao.png" alt="\u626B\u7801\u5173\u6CE8\u540E\u56DE\u590D\u300C\u7B80\u5386\u300D\u5173\u952E\u5B57"></p><p>\u8FD9\u4F4D\u5B66\u5F1F\u8BF4\u81EA\u5DF1\u5728\u79CB\u62DB\u7684\u65F6\u5019\u6CA1\u7528\u5FC3\u627E\u5DE5\u4F5C\uFF0C\u7B49\u6BD5\u4E1A\u540E\u624D\u53D1\u73B0\u627E\u7684\u5DE5\u4F5C\u4E0D\u6EE1\u610F\uFF0C\u52C9\u5F3A\u5E72\u4E86\u534A\u5E74\u5C31\u4E0D\u60F3\u5E72\u4E86\uFF0C\u7136\u540E\u8D70\u7684\u793E\u62DB\uFF0C\u53D1\u73B0\u793E\u62DB\u6BD4\u6821\u62DB\u8981\u96BE\u4E00\u70B9\u3002</p><p>\u5728\u6B63\u5F0F\u5206\u4EAB\u7B80\u5386\u4FEE\u6539\u6848\u4F8B\u524D\uFF0C\u4E8C\u54E5\u5148\u7B80\u5355\u603B\u7ED3\u4E00\u4E0B\u6821\u62DB\u548C\u793E\u62DB\u5427\u3002</p><p><strong>\u6821\u62DB\u770B\u57FA\u7840\u3001\u6F5C\u529B\uFF0C\u793E\u62DB\u770B\u80FD\u529B\u3001\u5373\u6218\u529B</strong>\u3002</p><p><strong>\u6821\u62DB</strong>\uFF0C\u5BF9\u4E8E\u67D0\u4E9B\u6280\u672F\u95EE\u9898\u4F60\u53EF\u4EE5\u4E0D\u61C2\u4E0D\u4F1A\uFF0C\u6CA1\u5173\u7CFB\uFF0C\u770B\u7684\u662F\u4F60\u7684\u6F5C\u529B\uFF0C\u4F60\u7684\u57FA\u672C\u529F\u3002\u6846\u67B6\u4E0D\u4F1A\uFF1F\u6CA1\u4E8B\uFF0C\u5B66\u5C31\u662F\u4E86\u3002</p><p><strong>\u793E\u62DB</strong>\uFF0C\u5E76\u4E0D\u662F\u7684\uFF0C\u793E\u62DB\u770B\u7684\u662F\u4F60\u7684\u8FC7\u5F80\u7ECF\u5386\u4EE5\u53CA\u4F60\u89E3\u51B3\u95EE\u9898\u7684\u80FD\u529B\u3002\u4EBA\u5BB6\u62DB\u4F60\u8FC7\u6765\u662F\u9700\u8981\u4F60\u6765\u5E72\u6D3B\u7684\uFF0C\u4E0D\u662F\u8BA9\u4F60\u6765\u5E26\u85AA\u5B66\u4E60\u7684\uFF0C\u516C\u53F8\u53C8\u4E0D\u662F\u6148\u5584\u673A\u6784\u554A\u3002</p><p>\u6240\u4EE5\u5E0C\u671B\u8FD8\u662F\u5728\u6821\u7684\u5B66\u5F1F\u5B66\u59B9\u4EEC\u597D\u597D\u5B66\u5B66\u8BA1\u7B97\u673A\u57FA\u672C\u529F\uFF0C\u6253\u6253\u57FA\u7840\u3002</p><p>\u7A0B\u5E8F\u5458\u5185\u529F\u662F\u5F88\u91CD\u8981\u7684\uFF0C\u6BD4\u5982\u64CD\u4F5C\u7CFB\u7EDF\u3001\u8BA1\u7B97\u673A\u7F51\u7EDC\u3001\u6570\u636E\u5E93\u3001\u8BA1\u7B97\u673A\u7EC4\u6210\u539F\u7406\u8FD9\u4E9B\u3002</p><p>\u597D\u4E86\uFF0C\u5E9F\u8BDD\u4E0D\u591A\u8BF4\uFF0C\u5F00\u59CB\u4ECA\u5929\u7684\u4E3B\u9898\u5427\u3002</p><p>\u4EE5\u4E0B\u5185\u5BB9\u6D89\u53CA\u5230\u8FD9\u4F4D\u5B66\u5F1F\u7684\u4E00\u4E9B\u5173\u952E\u4FE1\u606F\u5DF2\u8131\u654F\uFF0C\u4E0D\u5F71\u54CD\u5927\u5BB6\u9605\u8BFB\uFF0C\u6211\u6309\u7167\u4FEE\u6539\u6A21\u5757\u7ED9\u5927\u5BB6\u5206\u4EAB\u3002</p><h3 id="\u4E13\u4E1A\u6280\u80FD" tabindex="-1"><a class="header-anchor" href="#\u4E13\u4E1A\u6280\u80FD" aria-hidden="true">#</a> \u4E13\u4E1A\u6280\u80FD</h3><p>\u9996\u5148\u6765\u770B\u4E00\u4E0B\u8FD9\u4F4D\u5B66\u5F1F\u7684\u4E13\u4E1A\u6280\u80FD\u90E8\u5206\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/download/jianli-2c93d164-55f7-4d2f-b0d0-f0857644a265.jpg" alt=""></p><p>\u5176\u5B9E\uFF0C\u8FD9\u90E8\u5206\u4ED6\u5199\u7684\u5DF2\u7ECF\u633A\u597D\u7684\u4E86\uFF0C\u7B80\u5355\u5927\u65B9\u3001\u6761\u7406\u6E05\u6670\u3002</p><p>\u4E5F\u80FD\u4ECE\u4ED6\u7684\u4E13\u4E1A\u6280\u80FD\u63CF\u8FF0\u770B\u51FA\u6765\u8FD9\u4F4D\u5B66\u5F1F\u633A\u5389\u5BB3\u7684\uFF0C\u53EF\u8FD8\u662F\u6709\u4E9B\u4E0D\u8DB3\u4E4B\u5904\uFF0C\u6211\u4E5F\u60F3\u76F8\u5E94\u7684\u7ED9\u51FA\u4E86\u4E00\u4E9B\u5EFA\u8BAE\u548C\u610F\u89C1\u3002</p><p><strong>\u4FEE\u6539\u610F\u89C1</strong></p><p>1\u3001<strong>\u7F16\u7A0B\u8BED\u8A00</strong>\u90E8\u5206\u7684\u7B2C\u4E00\u53E5\u8BDD\u6211\u5EFA\u8BAE\u4ED6\u6539\u4E00\u4E0B\uFF0C\u56E0\u4E3A\u539F\u6587\u8BF4\u7684\u6709\u70B9\u5197\u4F59\u3002\u6211\u5EFA\u8BAE\u4ED6\u6539\u6210\u201C\u719F\u6089C++\u7F16\u7A0B\u8BED\u8A00\uFF0C\u57FA\u672C\u529F\u624E\u5B9E\uFF0C\u719F\u7EC3\u638C\u63E1STL\u6A21\u677F\u5E93\u201D\u3002</p><p>\u540E\u9762\u7684\u201C\u9605\u8BFB\u6E90\u7801\u201D\u6211\u5EFA\u8BAE\u662F\u4E0D\u52A0\u7684\uFF0C\u56E0\u4E3ASTL\u4E0B\u7684\u601D\u60F3\u786E\u5B9E\u6BD4\u8F83\u7CBE\u5999\uFF0C\u5982\u679C\u522B\u4EBA\u6293\u4F4F\u4F60\u7684\u201C\u9605\u8BFB\u8FC7\u90E8\u5206\u6E90\u7801\u201D\u8FD9\u51E0\u4E2A\u5B57\u4F7F\u52B2\u95EE\u4F60\uFF0C\u5341\u6709\u516B\u4E5D\u8981\u5403\u4E0D\u6D88\uFF0C\u4FDD\u9669\u8D77\u89C1\u8FD8\u662F\u4E0D\u8981\u52A0\u4E0A\u4E3A\u597D\u3002\u4F60\u9700\u8981\u5BF9\u4F60\u7B80\u5386\u4E0A\u7684\u6BCF\u4E00\u4E2A\u5B57\uFF0C\u6216\u8005\u8BF4\u6BCF\u4E00\u4E2A\u6807\u70B9\u7B26\u53F7\u8D1F\u8D23\u3002</p><p>2\u3001<strong>\u6570\u636E\u7ED3\u6784</strong>\u90E8\u5206\uFF0C\u5176\u5B9E\u4ED6\u5199\u7684\u633A\u597D\u7684\u4E86\uFF0C\u6211\u5EFA\u8BAE\u4ED6\u5199\u5F97\u66F4\u7CBE\u70BC\u5177\u4F53\u4E00\u70B9\uFF0C<strong>\u5C06\u539F\u6587</strong>\u201C \xA0\u719F\u6089\u5E38\u7528\u7B97\u6CD5(Leetcode 200\u9053)\u3001\u6570\u636E\u7ED3\u6784 (\u94FE\u8868\u3001\u6808\u3001\u961F\u5217\u3001\u54C8\u5E0C\u8868\u3001\u4E8C\u53C9\u6811\u3001B/B+\u6811\u3001\u7EA2\u9ED1\u6811\u7B49) \xA0\u201D<strong>\u6539\u4E3A</strong>\u201C\u719F\u6089\u5E38\u89C1\u6570\u636E\u7ED3\u6784\u4E0E\u7B97\u6CD5\uFF0C\u5982\u94FE\u8868\u3001\u6808\u3001\u54C8\u5E0C\u8868\u3001\u4E8C\u53C9\u6811\u7B49\uFF0C\u4EE574%\u6B63\u786E\u7387\u901A\u8FC7\u529B\u6263\u7F51\u7AD9 214 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\xA0\u719F\u6089 MySQL \u5173\u7CFB\u578B\u6570\u636E\u5E93\u3001Redis \u975E\u5173\u7CFB\u578B\u6570\u636E\u5E93\uFF0C\u4E86\u89E3 MySQL \u67E5\u8BE2\u6027\u80FD\u4F18\u5316\u76F8\u5173\u6280\u672F\uFF0CRedis \u4E94\u5927\u6570\u636E\u7C7B\u578B\uFF0C\u6301\u4E45\u5316\u673A\u5236\u4EE5\u53CA\u4E3B\u4ECE\u590D\u5236\u6280\u672F \xA0\u201D\u8FD9\u5C31\u76F8\u5F53\u4E8E\u76F4\u63A5\u8BA9\u9762\u8BD5\u5B98\u95EE\u4F60Redis\u7684\u4E94\u79CD\u6570\u636E\u7ED3\u6784\u662F\u4EC0\u4E48\uFF1F\u6301\u4E45\u5316\u3001\u4E3B\u4ECE\u590D\u5236\u53C8\u662F\u4EC0\u4E48\u4E86\uFF1F</p><p>\u9762\u8BD5\u5B98\u53C8\u4E0D\u662F\u50BB\u5B50...</p><p>\u6211\u5EFA\u8BAE\u4ED6\u6539\u6210\u201C\u719F\u6089\u5173\u7CFB\u578B\u6570\u636E\u5E93MySQL\u3001\u5185\u5B58\u578B\u6570\u636E\u5E93Redis\uFF0C\u4E86\u89E3\u5E38\u89C1\u67E5\u8BE2\u4F18\u5316\u6280\u672F\u3002\u201D\u8FD9\u6837\u7A0D\u5FAE\u59D4\u5A49\u4E00\u4E9B\u3002\u3002\u3002</p><p>\u4E0B\u9762\u662F\u6211\u5F53\u65F6\u7ED9\u4ED6\u7684\u4FEE\u6539\u610F\u89C1\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/download/jianli-f5c60946-3cdd-4ac6-9e20-8360808f8612.jpg" alt=""></p><h3 id="\u9879\u76EE\u7ECF\u5386" tabindex="-1"><a class="header-anchor" href="#\u9879\u76EE\u7ECF\u5386" aria-hidden="true">#</a> \u9879\u76EE\u7ECF\u5386</h3><p>\u5176\u5B9E\u4E00\u4EFD\u6821\u62DB\u7B80\u5386\uFF0C\u6700\u91CD\u8981\u7684\u5C31\u662F\u9879\u76EE\u7ECF\u5386\u3001\u5B9E\u4E60\u7ECF\u5386\uFF08\u6709\u5219\u52A0\u5206\uFF0C\u6CA1\u6709\u4E5F\u884C\uFF09\u3001\u4E13\u4E1A\u6280\u80FD\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/download/jianli-a715eaa8-86c5-41ce-aee7-cd1873e2eec8.jpg" alt=""></p><p>\u53EF\u4EE5\u4ECE\u8FD9\u4F4D\u5B66\u5F1F\u7684\u63CF\u8FF0\u4E2D\u770B\u51FA\u6765\uFF0C\u4ED6\u6BD5\u4E1A\u540E\u7684\u8FD9\u56DB\u4E2A\u6708\u91CC\u786E\u5B9E\u505A\u4E86\u4E0D\u5C11\u7684\u5DE5\u4F5C\uFF0C\u4F46\u611F\u89C9\u6CA1\u8BF4\u51FA\u6765\u81EA\u5DF1\u6240\u505A\u5DE5\u4F5C\u7684\u610F\u4E49\u548C\u96BE\u70B9\u6240\u5728\u3002</p><p>\u4F60\u53EF\u80FD\u89C9\u5F97\u6CA1\u4EC0\u4E48\uFF0C\u4F46\u90A3\u624D\u662F\u9762\u8BD5\u5B98\u5728\u610F\u7684\u5730\u65B9\u3002</p><p>\u8BBE\u8EAB\u5904\u5730\u7684\u60F3\uFF0C\u5982\u679C\u4F60\u662F\u4E00\u4E2A\u9762\u8BD5\u5B98\uFF0C\u4F60\u4E5F\u5E0C\u671B\u62DB\u6765\u7684\u65B0\u9C9C\u8840\u6DB2\u80FD\u529B\u8D8A\u5F3A\u8D8A\u597D\u3002\u90A3\u80FD\u529B\u5F3A\u4E0D\u5F3A\u5728\u9762\u8BD5\u521D\u671F\u5C31\u662F\u901A\u8FC7\u4F60\u7684\u5B9E\u4E60\u7ECF\u5386\u6216\u8005\u9879\u76EE\u7ECF\u9A8C\u4F53\u73B0\u7684\u554A\u3002</p><p><strong>\u9488\u5BF9\u7B2C\u4E00\u4E2A\u9879\u76EE\uFF0C\u4E8C\u54E5\u7ED9\u51FA\u4E86\u51E0\u70B9\u4FEE\u6539\u610F\u89C1</strong>\uFF1A</p><p>1\u3001\u4E00\u4E2A\u9879\u76EE\uFF0C\u4F60\u627F\u62C5\u7684\u89D2\u8272\u662F\u4EC0\u4E48\uFF1F\u4E3B\u8981\u8D1F\u8D23\u4EBA\u8FD8\u662F\u6838\u5FC3\u6210\u5458\uFF1F\u5305\u62EC\u9879\u76EE\u7684\u8D77\u59CB\u65F6\u95F4\u8981\u6CE8\u660E\u3002</p><p>2\u3001\u5BF9\u4E8E\u5176\u4E2D\u7684\u6570\u636E\u5E93\u5BC6\u7801\u9A8C\u8BC1\u3002\u6211\u5EFA\u8BAE\u4ED6\u53BB\u6389\uFF0C\u56E0\u4E3A\u6709\u70B9\u6C34\u5E73\u8F83\u4F4E\uFF0C\u8FD8\u4E0D\u5982\u4E0D\u5199\u3002\u867D\u8BF4\u540E\u7AEF\u90FD\u662F\u589E\u5220\u6539\u67E5\uFF0C\u4F46\u4F60\u4E0D\u80FD\u76F4\u63A5\u8BF4\u4F60\u5C31\u662F\u641E\u4E86\u4E2A\u5BC6\u7801\u9A8C\u8BC1\u554A\uFF0C\u4F60\u8FD9\u4E5F\u592A\u803F\u76F4\u4E86\u5427\u3002</p><p>3\u3001\u6280\u672F\u4EAE\u70B9\u90E8\u5206\u63CF\u8FF0\u4E0D\u591F\u6E05\u695A\uFF0C\u867D\u7136\u8FD9\u4F4D\u5B66\u5F1F\u505A\u4E86\u5F88\u591A\u5DE5\u4F5C\uFF0C\u53EF\u4ECE\u4ED6\u7684\u63CF\u8FF0\u4E2D\u662F\u770B\u4E0D\u51FA\u6765\u4EC0\u4E48\u5DE5\u4F5C\u7684\uFF0C\u6211\u7ED9\u4ED6\u6362\u4E86\u4E00\u79CD\u8BF4\u6CD5\u3002</p><p><strong>\u6280\u672F\u4EAE\u70B9\u539F\u6587\u63CF\u8FF0</strong>\uFF1A</p><p>\u5B9E\u73B0\u4E0E bash \u51E0\u4E4E\u5B8C\u5168\u76F8\u540C\u7684 cd \u529F\u80FD\uFF1B\u4F7F\u7528\u8FB9\u7F18\u89E6\u53D1\u4F18\u5316 epoll \u9891\u7E41\u54CD\u5E94\uFF0C\u4F7F\u7528\u8FDB\u7A0B\u6C60\u4E0E\u7EBF\u7A0B\u6C60\u51CF\u5C11 CPU \u8FD0\u8F6C\u8D1F\u8F7D\uFF1B\u8D85\u65F6\u65AD\u5F00\uFF0C\u9488\u5BF9\u8FDE\u63A5\u4E0A\u7684\u5BA2\u6237\u7AEF\uFF0C\u82E5\u8D85\u8FC7 30 \u79D2\u672A\u53D1\u9001\u4EFB\u4F55\u8BF7\u6C42\uFF0C\u65AD\u5F00\u8FDE\u63A5\uFF0C\u5E76\u4F7F\u7528\u73AF\u5F62\u961F\u5217\u6280\u672F\u5B9E\u73B0\u9AD8\u5E76\u53D1 \xA0\uFF1B</p><p>\u5176\u5B9E\u4ED6\u5199\u7684\u633A\u597D\u7684\u4E86\uFF0C\u4F46\u6211\u8FD8\u662F\u89C9\u5F97\u5DEE\u70B9\u610F\u601D\uFF0C\u5C31\u662F\u8BF4\u7684\u592A\u767D\u8BDD\u4E86\u4E00\u4E9B\uFF0C\u6240\u4EE5\u6211\u7528\u81EA\u5DF1\u7684\u8BED\u8A00\u5E2E\u4ED6\u52A0\u5DE5\u6DA6\u8272\u4E86\u4E00\u4E0B\uFF0C\u4E0B\u9762\u662F\u6211\u7684\u4FEE\u6539\u7248\u3002</p><p><strong>\u6280\u672F\u4EAE\u70B9\u4FEE\u6539\u7248</strong>\uFF1A</p><p>1\u3001\u5B9E\u73B0\u4E0E bash \u51E0\u4E4E\u5B8C\u5168\u76F8\u540C\u7684 cd \u529F\u80FD\uFF0C\u4F46\u53CD\u5E94\u65F6\u95F4\u66F4\u77ED</p><p>2\u3001\u4F7F\u7528epoll\u8FB9\u7F18\u89E6\u53D1\u8FDB\u884C\u9891\u7E41\u54CD\u5E94\uFF0C\u5E76\u8F85\u52A9\u4EE5\u8FDB\u7A0B\u6C60\u548C\u7EBF\u7A0B\u6C60\u6280\u672F\u6765\u51CF\u5C11CPU\u8FD0\u8F6C\u8D1F\u8F7D\uFF0C\u589E\u52A0\u7CFB\u7EDFCPU\u5229\u7528\u7387</p><p>3\u3001\u667A\u80FD\u5316\u65AD\u5F00\u8BBE\u8BA1\uFF1A\u4F7F\u7528\u73AF\u5F62\u961F\u5217\u6280\u672F\u5B9E\u73B0\u9AD8\u5E76\u53D1\uFF0C\u5BF9\u4E8E30\u79D2\u5185\u65E0\u4EFB\u4F55\u7F51\u7EDC\u5305\u4EA4\u4E92\u7684\u8FDE\u63A5\u8FDB\u884C\u5F3A\u5236\u65AD\u5F00\u5904\u7406\uFF0C\u6709\u6548XXXX\u3002</p><p><strong>\u662F\u4E0D\u662F\u611F\u89C9\u77AC\u95F4\u597D\u4E00\u70B9\u4E86</strong>\u3002\u3002\u3002\u3002\u6211\u53EA\u80FD\u8BF4\uFF0C<strong>\u4E2D\u534E\u8BED\u8A00\uFF0C\u535A\u5927\u7CBE\u6DF1\uFF0C\u4E0D\u670D\u4E0D\u884C</strong>\u3002</p><p>\u4EE5\u4E0B\u662F\u4FEE\u6539\u610F\u89C1\u6807\u6CE8</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/download/jianli-5b6ff7c0-c8ad-4874-8ee8-7593e3ee1f5f.jpg" alt=""></p><p>\u81F3\u6B64\uFF0C\u5E2E\u4ED6\u628A\u7B2C\u4E00\u4E2A\u9879\u76EE\u4FEE\u6539\u5B8C\u6BD5\u4E86\uFF0C<strong>\u9488\u5BF9\u7B2C\u4E8C\u4E2A\u9879\u76EE\u7684\u4FEE\u6539</strong>\uFF0C\u6211\u5C31\u4E0D\u591ABB\u4E86\uFF0C\u76F4\u63A5\u8D34\u4E0A\u6765\u5427\u3002</p><p><strong>\u4EE5\u4E0B\u662F\u6211\u7ED9\u51FA\u7684\u4FEE\u6539\u610F\u89C1</strong>\uFF1A</p><p>\u8FD9\u4E2A\u9879\u76EE\u540D\u6539\u6210\uFF1A\u6C7D\u8F66\u51FA\u884CAPP \u7F3A\u5C11\u4F60\u7684\u89D2\u8272 \u548C \u9879\u76EE\u8D77\u59CB\u65F6\u95F4 \u8BE5APP\u4E3B\u8981\u4E1A\u52A1\u662F\u4EC0\u4E48\uFF1F\u6700\u7EC8\u7684\u529F\u80FD\u6709\u54EA\u4E9B\uFF1F\u7136\u540E\u5199\u4E0A\u81EA\u5DF1\u5728\u5176\u4E2D\u7684\u5DE5\u4F5C\u3002\u4E2A\u4EBA\u5DE5\u4F5C\u5BF9\u4E8E\u8BE5APP\u7684\u52A0\u6210\u5728\u54EA\u91CC\uFF0C\u9700\u8981\u5177\u4F53\u7684\u91CF\u5316\u8BCD\u3002</p><p>\u6280\u672F\u4EAE\u70B9\u4E2D\u7684\u5220\u9664\u76F8\u4F3C\u7F51\u9875\uFF0C\u5220\u9664\u6B63\u786E\u7387\u6709\u591A\u5C11\uFF0C\u9488\u5BF9\u8BE5APP\u67D0\u67D0\u7F3A\u9677\u548C\u4E0D\u8DB3\uFF0C\u63D0\u51FA\u5EFA\u7ACB\u5012\u6392\u7D22\u5F15\u6280\u672F\uFF0C\u63A8\u9001\u5F3A\u76F8\u5173\u7684\u7F51\u9875\uFF0C\u6700\u7EC8\u63D0\u5347\u70B9\u51FB\u7387XX.XX%\u3002</p><p>\u6700\u540E\u5199\u4E0A\u4E2A\u4EBA\u6536\u83B7\uFF1A\u5B66\u5230\u4E86\u54EA\u4E9B\uFF1F\u5BF9XXX\u6709\u4E86\u66F4\u6DF1\u7684\u8BA4\u8BC6\u548C\u4E86\u89E3</p><p><strong>\u4E0B\u9762\u662F\u5F53\u65F6\u7ED9\u4ED6\u505A\u7684\u6807\u6CE8</strong>\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/download/jianli-f2aec848-d462-491b-9fe1-7d939ea16ed8.jpg" alt=""></p><p>\u5176\u5B9E\u5BF9\u4E8E\u8BE5\u90E8\u5206\u7684\u4FEE\u6539\uFF0C\u6211\u662F\u7D27\u7D27\u6293\u4F4F\u4E00\u4E2A\u8981\u70B9\uFF0C\u90A3\u5C31\u662F\u5C3D\u53EF\u80FD\u4F7F\u7528\u5177\u5316\u7684\u6307\u6807\u5373\u660E\u786E\u7684\u4FE1\u606F\u800C\u4E0D\u662F\u6982\u62EC\u6027\u7684\u63CF\u8FF0\u3002</p><p>\u6BD4\u5982\u76F4\u63A5\u544A\u8BC9\u522B\u4EBA\u63D0\u5347\u4E86XX%\uFF0C\u800C\u4E0D\u662F\u8BF4\u4E00\u53E5\u201C\u6709\u7740\u8F83\u597D\u7684\u63D0\u5347\u6548\u679C\u201D\uFF1B\u76F4\u63A5\u544A\u8BC9\u522B\u4EBA\u201C\u9879\u76EE\u4F18\u5316\u4E86XX\u79D2\uFF0C\u76F8\u8F83\u4E8E\u4E0A\u4E00\u7248\u672C\u901F\u5EA6\u52A0\u5FEB\u4E86XX%\u201D\uFF0C\u800C\u4E0D\u662F\u201D\u7ECF\u8FC7XX\u6280\u672F\uFF0C\u901F\u5EA6\u6709\u4E86\u8F83\u5927\u63D0\u9AD8\u201C\u3002</p><p>\u8FD9\u4E00\u70B9\uFF0C\u6211\u5728\u81EA\u5DF1\u7684\u7B80\u5386\u4FEE\u6539\u8FED\u4EE3\u6587\u7AE0\u4E2D\u4E5F\u63D0\u5230\u8FC7\uFF0C\u5F88\u91CD\u8981\uFF0C\u7279\u522B\u91CD\u8981\uFF0C\u5177\u5316\u7684\u6307\u6807\u4FE1\u606F\u7ED9\u4EBA\u7684\u7B2C\u4E00\u611F\u89C9\u5C31\u662F\u4E0D\u4E00\u6837\u7684\u3002</p><h3 id="\u5DE5\u4F5C\u7ECF\u5386\u3001\u6559\u80B2\u7ECF\u5386\u3001\u5956\u9879\u8BC1\u4E66" tabindex="-1"><a class="header-anchor" href="#\u5DE5\u4F5C\u7ECF\u5386\u3001\u6559\u80B2\u7ECF\u5386\u3001\u5956\u9879\u8BC1\u4E66" aria-hidden="true">#</a> \u5DE5\u4F5C\u7ECF\u5386\u3001\u6559\u80B2\u7ECF\u5386\u3001\u5956\u9879\u8BC1\u4E66</h3><p>\u8FD9\u91CC\u6BD4\u8F83\u7C7B\u4F3C\uFF0C\u6211\u5C31\u4E00\u8D77\u653E\u4E0A\u6765\u8BF4\u4E86</p><p>\u9996\u5148\u662F\u539F\u6587\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/download/jianli-eabee6e7-0fcf-4fb7-9ca8-0ada1c604acf.jpg" alt=""></p><p>\u6211\u7ED9\u7684\u4FEE\u6539\u610F\u89C1\u6279\u6CE8\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/download/jianli-bb7279ad-dd46-47ea-8f13-37d5caaf404e.jpg" alt=""></p><p>1\u3001\u5728\u5DE5\u4F5C\u7ECF\u5386\u8FD9\u91CC\uFF0C\u6CE8\u610F\u7EC6\u8282\u95EE\u9898\uFF0C\u6BD4\u5982\u4F60\u7684\u5C97\u4F4D\u540D\u79F0\u662F\u4EC0\u4E48\uFF1F\u4F60\u5728\u5B9E\u4E60\u8FC7\u7A0B\u4E2D\uFF0C\u4F60\u7684\u5DE5\u4F5C\u6709\u54EA\u4E9B\uFF1F\u5728\u8FD9\u8FC7\u7A0B\u4E2D\u7528\u5230\u4E86\u54EA\u4E9B\u6280\u80FD\uFF1F</p><p>\u4E0D\u8981\u76F4\u63A5\u5C31\u662F\u4E00\u53E5\u8BDD\u5199\u51FA\u6765\uFF0C\u4E0D\u660E\u4E0D\u767D\u7684\uFF0C\u6CA1\u4EC0\u4E48\u613F\u610F\u770B\u7684\u3002\u4EBA\u90FD\u662F\u89C6\u89C9\u52A8\u7269\uFF0C\u90FD\u5E0C\u671B\u770B\u5230\u6574\u9F50\u6709\u5E8F\u7684\u5185\u5BB9\u3002</p><p>\u8FD9\u91CC\u7684\u6574\u9F50\u6709\u5E8F\u4E0D\u4EC5\u8981\u6C42\u4F60\u7684\u6392\u7248\u6574\u9F50\uFF0C\u4F60\u60F3\u8981\u8868\u8FBE\u7684\u610F\u601D\u4E5F\u8981\u6709\u5E8F\u3002</p><p>\u6BD4\u5982\u628A\u4F60\u7684\u5DE5\u4F5C\u6216\u8005\u5B9E\u4E60\u5206\u4E3A\u56E2\u961F\u5DE5\u4F5C\u3001\u4E2A\u4EBA\u5DE5\u4F5C\u3001\u4E2A\u4EBA\u6536\u83B7\uFF0C\u6328\u4E2A\u5C55\u5F00\u3002</p><p>2\u3001\u7531\u4E8E\u8FD9\u4F4D\u5B66\u5F1F\u5DF2\u7ECF\u6BD5\u4E1A\u4E86\uFF0C\u5DF2\u7ECF\u4E0D\u80FD\u518D\u4EE5\u6821\u62DB\u8EAB\u4EFD\u53BB\u9762\u8BD5\u627E\u5DE5\u4F5C\u4E86\uFF0C\u6240\u4EE5\u6559\u80B2\u7ECF\u5386\u8FD9\u91CC\u5176\u5B9E\u5DF2\u7ECF\u6CA1\u5FC5\u8981\u5199\u5728\u6821\u5B66\u4E60\u7684\u8BFE\u7A0B\u4E86\u3002</p><p>\u4E00\u65E6\u4F60\u8E0F\u5165\u793E\u4F1A\uFF0C\u5931\u53BB\u4E86\u5E94\u5C4A\u751F\u8EAB\u4EFD\u4F60\u5C31\u4E0D\u518D\u662F\u6821\u62DB\u751F\u4E86\uFF0C\u8FD9\u4E2A\u65F6\u5019\u770B\u7684\u5C31\u662F\u4F60\u7684\u80FD\u529B\u4E86\u3002</p><p>3\u3001\u5BF9\u4E8E\u4E00\u4E9B\u7EC6\u8282\u95EE\u9898\u8BB0\u5F97\u505A\u597D\uFF0C\u5173\u952E\u5B57\u8BE5\u52A0\u7C97\u52A0\u7C97\u3002\u6BD4\u5982\u6709\u5206\u91CF\u7684\u56FD\u5956\u8FD8\u662F\u503C\u5F97\u4E00\u4E2A\u52A0\u7C97\u663E\u793A\u7684\u3002</p><p>4\u3001\u5982\u679C\u4F60\u8FC7\u4E86\u516D\u7EA7\uFF0C\u90A3\u76F4\u63A5\u5199<strong>\u516D\u7EA7</strong>\uFF0C\u5206\u6570\u8FD8\u53EF\u4EE5\u7684\u8BDD\u5C31\u5199\u4E0A\u5206\u6570\uFF1B\u5206\u6570\u6BD4\u8F83\u4F4E\u7684\u8BDD\uFF0C\u6BD4\u5982430\u8FD9\u79CD\u521A\u98D8\u8FC7\uFF0C\u5C31\u5199\u516D\u7EA7\u5C31\u884C\u3002</p><p>\u5982\u679C\u516D\u7EA7\u6CA1\u8FC7\uFF0C\u90A3\u5C31\u5199\u4E0A\u56DB\u7EA7\u5427\u3002</p><h3 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+++ /dev/null
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similarity index 99%
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+++ b/dist/assets/jibenjieshao.html.6a5f31db.js
@@ -1,4 +1,4 @@
-import{_ as t}from"./plugin-vue_export-helper.21dcd24c.js";import{r as a,o as i,c as d,a as p,b as r,d as e,e as l}from"./app.a0271b9c.js";const s={},n=p("h1",{id:"\u53EF\u80FD\u662F\u628Azookeeper\u6982\u5FF5\u8BB2\u7684\u6700\u6E05\u695A\u7684\u4E00\u7BC7\u6587\u7AE0",tabindex:"-1"},[p("a",{class:"header-anchor",href:"#\u53EF\u80FD\u662F\u628Azookeeper\u6982\u5FF5\u8BB2\u7684\u6700\u6E05\u695A\u7684\u4E00\u7BC7\u6587\u7AE0","aria-hidden":"true"},"#"),e(" \u53EF\u80FD\u662F\u628AZooKeeper\u6982\u5FF5\u8BB2\u7684\u6700\u6E05\u695A\u7684\u4E00\u7BC7\u6587\u7AE0")],-1),c=e("\u6574\u7406\uFF1A\u6C89\u9ED8\u738B\u4E8C\uFF0C\u6233"),u={href:"https://mp.weixin.qq.com/s/-evZg0epRrOr1IwQ3GJ2Zg",target:"_blank",rel:"noopener noreferrer"},b=e("\u8F6C\u8F7D\u94FE\u63A5"),g=e("\uFF0C\u4F5C\u8005\uFF1A\u6708\u4F34\u98DE\u9C7C\uFF0C\u6233"),Z={href:"https://mp.weixin.qq.com/s/B2ngp0q5kdWsCNH8sw_5DA",target:"_blank",rel:"noopener noreferrer"},h=e("\u539F\u6587\u94FE\u63A5"),K=e("\u3002"),v=l(`<h2 id="\u4E00\u3001\u57FA\u672C\u4ECB\u7ECD" tabindex="-1"><a class="header-anchor" href="#\u4E00\u3001\u57FA\u672C\u4ECB\u7ECD" aria-hidden="true">#</a> \u4E00\u3001\u57FA\u672C\u4ECB\u7ECD</h2><p>Apache ZooKeeper \u662F\u7531Apache Hadoop\u7684\u5B50\u9879\u76EE\u53D1\u5C55\u800C\u6765\uFF0C\u4E3A\u5206\u5E03\u5F0F\u5E94\u7528\u63D0\u4F9B\u9AD8\u6548\u4E14\u53EF\u9760\u7684\u5206\u5E03\u5F0F\u534F\u8C03\u670D\u52A1\u3002</p><p>\u5728\u89E3\u51B3\u5206\u5E03\u5F0F\u6570\u636E\u4E00\u81F4\u6027\u65B9\u9762\uFF0CZK\u6CA1\u6709\u76F4\u63A5\u91C7\u7528Paxos\u7B97\u6CD5\uFF0C\u800C\u662F\u91C7\u7528\u4E86ZAB\uFF08ZooKeeper Atomic Broadcast\uFF09\u534F\u8BAE\u3002 ZK\u53EF\u4EE5\u63D0\u4F9B\u8BF8\u5982\u6570\u636E\u53D1\u5E03/\u8BA2\u9605\u3001\u8D1F\u8F7D\u5747\u8861\u3001\u547D\u540D\u670D\u52A1\u3001\u5206\u5E03\u5F0F\u534F\u8C03/\u901A\u77E5\uFF0C\u96C6\u7FA4\u7BA1\u7406\uFF0CMaster\u9009\u4E3E\uFF0C\u5206\u5E03\u5F0F\u9501\uFF0C\u5206\u5E03\u5F0F\u961F\u5217\u7B49\u529F\u80FD\u3002</p><p>\u300C\u5B83\u5177\u6709\u4EE5\u4E0B\u7279\u6027\uFF1A\u300D</p><ul><li>\u300C\u987A\u5E8F\u4E00\u81F4\u6027\u300D\uFF1A\u4ECE\u4E00\u4E2A\u5BA2\u6237\u7AEF\u53D1\u8D77\u7684\u4E8B\u52A1\u8BF7\u6C42\uFF0C\u6700\u7EC8\u90FD\u4F1A\u4E25\u683C\u6309\u7167\u5176\u53D1\u8D77\u987A\u5E8F\u88AB\u5E94\u7528\u5230 Zookeeper \u4E2D\uFF1B</li><li>\u300C\u539F\u5B50\u6027\u300D\uFF1A\u8981\u4E48\u6240\u6709\u5E94\u7528\uFF0C\u8981\u4E48\u4E0D\u5E94\u7528\uFF1B\u4E0D\u5B58\u5728\u90E8\u5206\u673A\u5668\u5E94\u7528\u4E86\u8BE5\u4E8B\u52A1\uFF0C\u800C\u300C\u53E6\u4E00\u90E8\u5206\u6CA1\u6709\u5E94\u7528\u300D\u7684\u60C5\u51B5\uFF1B</li><li>\u300C\u5355\u4E00\u89C6\u56FE\u300D\uFF1A\u6240\u6709\u5BA2\u6237\u7AEF\u770B\u5230\u7684\u670D\u52A1\u7AEF\u6570\u636E\u6A21\u578B\u90FD\u662F\u4E00\u81F4\u7684\uFF0C\u65E0\u8BBA\u5BA2\u6237\u8FDE\u63A5\u7684\u662F\u54EA\u4E2AZK\u670D\u52A1\u5668\uFF1B</li><li>\u300C\u53EF\u9760\u6027\u300D\uFF1A\u4E00\u65E6\u670D\u52A1\u7AEF\u6210\u529F\u5E94\u7528\u4E86\u4E00\u4E2A\u4E8B\u52A1\uFF0C\u5219\u5176\u5F15\u8D77\u7684\u6539\u53D8\u4F1A\u4E00\u76F4\u4FDD\u7559\uFF0C\u76F4\u5230\u88AB\u53E6\u5916\u4E00\u4E2A\u4E8B\u52A1\u6240\u66F4\u6539\uFF1B</li><li>\u300C\u5B9E\u65F6\u6027\u300D\uFF1A\u4E00\u65E6\u4E00\u4E2A\u4E8B\u52A1\u88AB\u6210\u529F\u5E94\u7528\u540E\uFF0CZookeeper \u53EF\u4EE5\u4FDD\u8BC1\u5BA2\u6237\u7AEF\u7ACB\u5373\u53EF\u4EE5\u8BFB\u53D6\u5230\u8FD9\u4E2A\u4E8B\u52A1\u53D8\u66F4\u540E\u7684\u6700\u65B0\u72B6\u6001\u7684\u6570\u636E\uFF08\u300C\u4E00\u6BB5\u65F6\u95F4\u300D\uFF09\u3002</li></ul><h2 id="\u4E8C\u3001\u6570\u636E\u6A21\u578B" tabindex="-1"><a class="header-anchor" href="#\u4E8C\u3001\u6570\u636E\u6A21\u578B" aria-hidden="true">#</a> \u4E8C\u3001\u6570\u636E\u6A21\u578B</h2><p>ZooKeeper \u4E2D\u7684\u6570\u636E\u6A21\u578B\u662F\u4E00\u79CD\u6811\u5F62\u7ED3\u6784\uFF0C\u975E\u5E38\u50CF\u7535\u8111\u4E2D\u7684\u6587\u4EF6\u7CFB\u7EDF\uFF0C\u6709\u4E00\u4E2A\u6839\u6587\u4EF6\u5939\uFF0C\u4E0B\u9762\u8FD8\u6709\u5F88\u591A\u5B50\u6587\u4EF6\u5939\u3002</p><ul><li><p>ZooKeeper\u7684\u6570\u636E\u6A21\u578B\u4E5F\u5177\u6709\u4E00\u4E2A\u56FA\u5B9A\u7684\u6839\u8282\u70B9<code>\uFF08/\uFF09</code>\uFF0C\u6211\u4EEC\u53EF\u4EE5\u5728\u6839\u8282\u70B9\u4E0B\u521B\u5EFA\u5B50\u8282\u70B9\uFF0C\u5E76\u5728\u5B50\u8282\u70B9\u4E0B\u7EE7\u7EED\u521B\u5EFA\u4E0B\u4E00\u7EA7\u8282\u70B9\u3002</p></li><li><p>ZooKeeper \u6811\u4E2D\u7684\u6BCF\u4E00\u5C42\u7EA7\u7528\u659C\u6760<code>\uFF08/\uFF09</code>\u5206\u9694\u5F00\uFF0C\u4E14\u53EA\u80FD\u7528\u7EDD\u5BF9\u8DEF\u5F84\uFF08\u5982<code>get /work/task</code>\uFF09\u7684\u65B9\u5F0F\u67E5\u8BE2 ZooKeeper \u8282\u70B9\uFF0C\u800C\u4E0D\u80FD\u4F7F\u7528\u76F8\u5BF9\u8DEF\u5F84\u3002</p></li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zookeeper/shujumoxing-1.png" alt=""></p><p><strong>\u300C\u4E3A\u4EC0\u4E48 ZooKeeper \u4E0D\u80FD\u91C7\u7528\u76F8\u5BF9\u8DEF\u5F84\u67E5\u627E\u8282\u70B9\u5462\uFF1F\u300D</strong></p><blockquote><p>\u275D</p><p>\u8FD9\u662F\u56E0\u4E3A ZooKeeper \u5927\u591A\u662F\u5E94\u7528\u573A\u666F\u662F\u5B9A\u4F4D\u6570\u636E\u6A21\u578B\u4E0A\u7684\u8282\u70B9\uFF0C\u5E76\u5728\u76F8\u5173\u8282\u70B9\u4E0A\u8FDB\u884C\u64CD\u4F5C\u3002</p><p>\u275E</p></blockquote><p>\u50CF\u8FD9\u79CD\u67E5\u627E\u4E0E\u7ED9\u5B9A\u503C\u76F8\u7B49\u7684\u8BB0\u5F55\u95EE\u9898\u6700\u9002\u5408\u7528\u6563\u5217\u6765\u89E3\u51B3\u3002</p><p>\u56E0\u6B64 ZooKeeper \u5728\u5E95\u5C42\u5B9E\u73B0\u7684\u65F6\u5019\uFF0C\u4F7F\u7528\u4E86\u4E00\u4E2A hashtable\uFF0C\u5373 <code>hashtableConcurrentHashMap&lt;String, DataNode&gt; nodes</code>\uFF0C\u7528\u8282\u70B9\u7684\u5B8C\u6574\u8DEF\u5F84\u6765\u4F5C\u4E3A key \u5B58\u50A8\u8282\u70B9\u6570\u636E\u3002</p><p>\u8FD9\u6837\u5C31\u5927\u5927\u63D0\u9AD8\u4E86 ZooKeeper \u7684\u6027\u80FD\u3002</p><p><strong>\u300C\u8282\u70B9\u7C7B\u578B\u300D</strong></p><p>ZooKeeper \u4E2D\u7684\u6570\u636E\u8282\u70B9\u4E5F\u5206\u4E3A\u6301\u4E45\u8282\u70B9\u3001\u4E34\u65F6\u8282\u70B9\u548C\u6709\u5E8F\u8282\u70B9\u4E09\u79CD\u7C7B\u578B\uFF1A</p><blockquote><p>\u275D</p><p>1\u3001\u6301\u4E45\u8282\u70B9</p><p>\u275E</p></blockquote><p>\u4E00\u65E6\u5C06\u8282\u70B9\u521B\u5EFA\u4E3A\u6301\u4E45\u8282\u70B9\uFF0C\u8BE5\u6570\u636E\u8282\u70B9\u4F1A\u4E00\u76F4\u5B58\u50A8\u5728 ZooKeeper \u670D\u52A1\u5668\u4E0A\uFF0C\u5373\u4F7F\u521B\u5EFA\u8BE5\u8282\u70B9\u7684\u5BA2\u6237\u7AEF\u4E0E\u670D\u52A1\u7AEF\u7684\u4F1A\u8BDD\u5173\u95ED\u4E86\uFF0C\u8BE5\u8282\u70B9\u4F9D\u7136\u4E0D\u4F1A\u88AB\u5220\u9664\u3002\u5982\u679C\u6211\u4EEC\u60F3\u5220\u9664\u6301\u4E45\u8282\u70B9\uFF0C\u5C31\u8981\u663E\u5F0F\u8C03\u7528 delete \u51FD\u6570\u8FDB\u884C\u5220\u9664\u64CD\u4F5C\u3002</p><blockquote><p>\u275D</p><p>2\u3001\u4E34\u65F6\u8282\u70B9</p><p>\u275E</p></blockquote><p>\u5982\u679C\u5C06\u8282\u70B9\u521B\u5EFA\u4E3A\u4E34\u65F6\u8282\u70B9\uFF0C\u90A3\u4E48\u8BE5\u8282\u70B9\u6570\u636E\u4E0D\u4F1A\u4E00\u76F4\u5B58\u50A8\u5728 ZooKeeper \u670D\u52A1\u5668\u4E0A\u3002</p><p>\u5F53\u521B\u5EFA\u8BE5\u4E34\u65F6\u8282\u70B9\u7684\u5BA2\u6237\u7AEF\u4F1A\u8BDD\u56E0\u8D85\u65F6\u6216\u53D1\u751F\u5F02\u5E38\u800C\u5173\u95ED\u65F6\uFF0C\u8BE5\u8282\u70B9\u4E5F\u76F8\u5E94\u5728 ZooKeeper \u670D\u52A1\u5668\u4E0A\u88AB\u5220\u9664\uFF0C\u540C\u6837\uFF0C\u6211\u4EEC\u53EF\u4EE5\u50CF\u5220\u9664\u6301\u4E45\u8282\u70B9\u4E00\u6837\u4E3B\u52A8\u5220\u9664\u4E34\u65F6\u8282\u70B9\u3002</p><p>\u5728\u5E73\u65F6\u7684\u5F00\u53D1\u4E2D\uFF0C\u6211\u4EEC\u53EF\u4EE5\u5229\u7528\u4E34\u65F6\u8282\u70B9\u7684\u8FD9\u4E00\u7279\u6027\u6765\u505A\u670D\u52A1\u5668\u96C6\u7FA4\u5185\u673A\u5668\u8FD0\u884C\u60C5\u51B5\u7684\u7EDF\u8BA1\uFF0C\u5C06\u96C6\u7FA4\u8BBE\u7F6E\u4E3A<code>/servers</code>\u8282\u70B9\uFF0C\u5E76\u4E3A\u96C6\u7FA4\u4E0B\u7684\u6BCF\u53F0\u670D\u52A1\u5668\u521B\u5EFA\u4E00\u4E2A\u4E34\u65F6\u8282\u70B9<code>/servers/host</code>\uFF0C\u5F53\u670D\u52A1\u5668\u4E0B\u7EBF\u65F6\u8BE5\u8282\u70B9\u81EA\u52A8\u88AB\u5220\u9664\uFF0C\u6700\u540E\u7EDF\u8BA1\u4E34\u65F6\u8282\u70B9\u4E2A\u6570\u5C31\u53EF\u4EE5\u77E5\u9053\u96C6\u7FA4\u4E2D\u7684\u8FD0\u884C\u60C5\u51B5\u3002</p><blockquote><p>\u275D</p><p>3\u3001\u6709\u5E8F\u8282\u70B9</p><p>\u275E</p></blockquote><p>\u8282\u70B9\u6709\u5E8F\u662F\u8BF4\u5728\u6211\u4EEC\u521B\u5EFA\u6709\u5E8F\u8282\u70B9\u7684\u65F6\u5019\uFF0CZooKeeper \u670D\u52A1\u5668\u4F1A\u81EA\u52A8\u4F7F\u7528\u4E00\u4E2A\u5355\u8C03\u9012\u589E\u7684\u6570\u5B57\u4F5C\u4E3A\u540E\u7F00\uFF0C\u8FFD\u52A0\u5230\u6211\u4EEC\u521B\u5EFA\u8282\u70B9\u7684\u540E\u8FB9\u3002</p><p>\u4F8B\u5982\u4E00\u4E2A\u5BA2\u6237\u7AEF\u521B\u5EFA\u4E86\u4E00\u4E2A\u8DEF\u5F84\u4E3A <code>works/task-</code>\u7684\u6709\u5E8F\u8282\u70B9\uFF0C\u90A3\u4E48 ZooKeeper \u5C06\u4F1A\u751F\u6210\u4E00\u4E2A\u5E8F\u53F7\u5E76\u8FFD\u52A0\u5230\u8BE5\u8282\u70B9\u7684\u8DEF\u5F84\u540E\uFF0C\u6700\u540E\u8BE5\u8282\u70B9\u7684\u8DEF\u5F84\u4E3A<code>works/task-1</code>\u3002</p><ul><li>\u901A\u8FC7\u8FD9\u79CD\u65B9\u5F0F\u6211\u4EEC\u53EF\u4EE5\u76F4\u89C2\u7684\u67E5\u770B\u5230\u8282\u70B9\u7684\u521B\u5EFA\u987A\u5E8F\u3002</li></ul><p>ZooKeeper \u4E2D\u7684\u6BCF\u4E2A\u8282\u70B9\u90FD\u7EF4\u62A4\u6709\u8FD9\u4E9B\u5185\u5BB9\uFF1A\u4E00\u4E2A\u4E8C\u8FDB\u5236\u6570\u7EC4<code>\uFF08byte data[]\uFF09</code>\uFF0C\u7528\u6765\u5B58\u50A8\u8282\u70B9\u7684\u6570\u636E\u3001ACL \u8BBF\u95EE\u63A7\u5236\u4FE1\u606F\u3001\u5B50\u8282\u70B9\u6570\u636E\uFF08\u56E0\u4E3A\u4E34\u65F6\u8282\u70B9\u4E0D\u5141\u8BB8\u6709\u5B50\u8282\u70B9\uFF0C\u6240\u4EE5\u5176\u5B50\u8282\u70B9\u5B57\u6BB5\u4E3A null\uFF09\uFF0C\u9664\u6B64\u4E4B\u5916\u6BCF\u4E2A\u6570\u636E\u8282\u70B9\u8FD8\u6709\u4E00\u4E2A\u8BB0\u5F55\u81EA\u8EAB\u72B6\u6001\u4FE1\u606F\u7684\u5B57\u6BB5 stat\u3002</p><p><strong>\u300C\u8282\u70B9\u7684\u72B6\u6001\u7ED3\u6784\u300D</strong></p><p>\u6267\u884C<code>stat /zk_test</code>\uFF0C\u53EF\u4EE5\u770B\u5230\u63A7\u5236\u53F0\u8F93\u51FA\u4E86\u4E00\u4E9B\u4FE1\u606F\uFF0C\u8FD9\u4E9B\u5C31\u662F\u8282\u70B9\u72B6\u6001\u4FE1\u606F\u3002</p><p>\u6BCF\u4E00\u4E2A\u8282\u70B9\u90FD\u6709\u4E00\u4E2A\u81EA\u5DF1\u7684\u72B6\u6001\u5C5E\u6027\uFF0C\u8BB0\u5F55\u4E86\u8282\u70B9\u672C\u8EAB\u7684\u4E00\u4E9B\u4FE1\u606F\uFF1A</p><table><thead><tr><th><strong>\u300C\u72B6\u6001\u5C5E\u6027\u300D</strong></th><th><strong>\u300C\u8BF4\u660E\u300D</strong></th></tr></thead><tbody><tr><td>czxid</td><td>\u6570\u636E\u8282\u70B9\u521B\u5EFA\u65F6\u7684\u4E8B\u52A1 ID</td></tr><tr><td>ctime</td><td>\u6570\u636E\u8282\u70B9\u521B\u5EFA\u65F6\u7684\u65F6\u95F4</td></tr><tr><td>mzxid</td><td>\u6570\u636E\u8282\u70B9\u6700\u540E\u4E00\u6B21\u66F4\u65B0\u65F6\u7684\u4E8B\u52A1 ID</td></tr><tr><td>mtime</td><td>\u6570\u636E\u8282\u70B9\u6700\u540E\u4E00\u6B21\u66F4\u65B0\u65F6\u7684\u65F6\u95F4</td></tr><tr><td>pzxid</td><td>\u6570\u636E\u8282\u70B9\u7684\u5B50\u8282\u70B9\u6700\u540E\u4E00\u6B21\u88AB\u4FEE\u6539\u65F6\u7684\u4E8B\u52A1 ID</td></tr><tr><td><strong>\u300Ccversion\u300D</strong></td><td><strong>\u300C\u5B50\u8282\u70B9\u7684\u7248\u672C\u300D</strong></td></tr><tr><td><strong>\u300Cversion\u300D</strong></td><td><strong>\u300C\u5F53\u524D\u8282\u70B9\u6570\u636E\u7684\u7248\u672C\u300D</strong></td></tr><tr><td><strong>\u300Caversion\u300D</strong></td><td><strong>\u300C\u8282\u70B9\u7684 ACL \u7684\u7248\u672C\u300D</strong></td></tr><tr><td>ephemeralOwner</td><td>\u5982\u679C\u8282\u70B9\u662F\u4E34\u65F6\u8282\u70B9\uFF0C\u5219\u8868\u793A\u521B\u5EFA\u8BE5\u8282\u70B9\u7684\u4F1A\u8BDD\u7684 SessionID\uFF1B\u5982\u679C\u8282\u70B9\u662F\u6301\u4E45\u8282\u70B9\uFF0C\u5219\u8BE5\u5C5E\u6027\u503C\u4E3A 0</td></tr><tr><td>dataLength</td><td>\u6570\u636E\u5185\u5BB9\u7684\u957F\u5EA6</td></tr><tr><td>numChildren</td><td>\u6570\u636E\u8282\u70B9\u5F53\u524D\u7684\u5B50\u8282\u70B9\u4E2A\u6570</td></tr></tbody></table><p><strong>\u300C\u6570\u636E\u8282\u70B9\u7684\u7248\u672C\u300D</strong></p><p>\u5728 ZooKeeper \u4E2D\u4E3A\u6570\u636E\u8282\u70B9\u5F15\u5165\u4E86\u7248\u672C\u7684\u6982\u5FF5\uFF0C\u6BCF\u4E2A\u6570\u636E\u8282\u70B9\u6709 3 \u79CD\u7C7B\u578B\u7684\u7248\u672C\u4FE1\u606F\uFF0C\u5BF9\u6570\u636E\u8282\u70B9\u7684\u4EFB\u4F55\u66F4\u65B0\u64CD\u4F5C\u90FD\u4F1A\u5F15\u8D77\u7248\u672C\u53F7\u7684\u53D8\u5316\u3002</p><p>ZooKeeper \u7684\u7248\u672C\u4FE1\u606F\u8868\u793A\u7684\u662F\u5BF9\u8282\u70B9\u6570\u636E\u5185\u5BB9\u3001\u5B50\u8282\u70B9\u4FE1\u606F\u6216\u8005\u662F ACL \u4FE1\u606F\u7684\u4FEE\u6539\u6B21\u6570\u3002</p><h2 id="\u4E09\u3001\u6570\u636E\u5B58\u50A8" tabindex="-1"><a class="header-anchor" href="#\u4E09\u3001\u6570\u636E\u5B58\u50A8" aria-hidden="true">#</a> \u4E09\u3001\u6570\u636E\u5B58\u50A8</h2><p>\u4ECE\u5B58\u50A8\u4F4D\u7F6E\u4E0A\u6765\u8BF4\uFF0C\u4E8B\u52A1\u65E5\u5FD7\u548C\u6570\u636E\u5FEB\u7167\u4E00\u6837\uFF0C\u90FD\u5B58\u50A8\u5728\u672C\u5730\u78C1\u76D8\u4E0A\uFF1B\u800C\u4ECE\u4E1A\u52A1\u89D2\u5EA6\u6765\u8BB2\uFF0C\u5185\u5B58\u6570\u636E\u5C31\u662F\u6211\u4EEC\u521B\u5EFA\u6570\u636E\u8282\u70B9\u3001\u6DFB\u52A0\u76D1\u63A7\u7B49\u8BF7\u6C42\u65F6\u76F4\u63A5\u64CD\u4F5C\u7684\u6570\u636E\u3002</p><p>\u4E8B\u52A1\u65E5\u5FD7\u6570\u636E\u4E3B\u8981\u7528\u4E8E\u8BB0\u5F55\u672C\u5730\u4E8B\u52A1\u6027\u4F1A\u8BDD\u64CD\u4F5C\uFF0C\u7528\u4E8E ZooKeeper \u96C6\u7FA4\u670D\u52A1\u5668\u4E4B\u95F4\u7684\u6570\u636E\u540C\u6B65\u3002</p><p>\u4E8B\u52A1\u5FEB\u7167\u5219\u662F\u5C06\u5185\u5B58\u6570\u636E\u6301\u4E45\u5316\u5230\u672C\u5730\u78C1\u76D8\u3002</p><p>\u275D \u8FD9\u91CC\u8981\u6CE8\u610F\u7684\u4E00\u70B9\u662F\uFF0C\u6570\u636E\u5FEB\u7167\u662F\u6BCF\u95F4\u9694\u4E00\u6BB5\u65F6\u95F4\u624D\u628A\u5185\u5B58\u6570\u636E\u5B58\u50A8\u5230\u672C\u5730\u78C1\u76D8\uFF0C\u56E0\u6B64\u6570\u636E\u5E76\u4E0D\u4F1A\u4E00\u76F4\u4E0E\u5185\u5B58\u6570\u636E\u4FDD\u6301\u4E00\u81F4\u3002 \u275E \u5728\u5355\u53F0 ZooKeeper \u670D\u52A1\u5668\u8FD0\u884C\u8FC7\u7A0B\u4E2D\u56E0\u4E3A\u5F02\u5E38\u800C\u5173\u95ED\u65F6\uFF0C\u53EF\u80FD\u4F1A\u51FA\u73B0\u6570\u636E\u4E22\u5931\u7B49\u60C5\u51B5\u3002</p><p>\u300C\u5185\u5B58\u6570\u636E\u300D</p><p>ZooKeeper \u7684\u6570\u636E\u6A21\u578B\u53EF\u4EE5\u770B\u4F5C\u4E00\u68F5\u6811\u5F62\u7ED3\u6784\uFF0C\u800C\u6570\u636E\u8282\u70B9\u5C31\u662F\u8FD9\u68F5\u6811\u4E0A\u7684\u53F6\u5B50\u8282\u70B9\u3002</p><p>\u4ECE\u6570\u636E\u5B58\u50A8\u7684\u89D2\u5EA6\u770B\uFF0CZooKeeper \u7684\u6570\u636E\u6A21\u578B\u662F\u5B58\u50A8\u5728\u5185\u5B58\u4E2D\u7684\u3002</p><p>\u6211\u4EEC\u53EF\u4EE5\u628A ZooKeeper \u7684\u6570\u636E\u6A21\u578B\u770B\u4F5C\u662F\u5B58\u50A8\u5728\u5185\u5B58\u4E2D\u7684\u6570\u636E\u5E93\uFF0C\u800C\u8FD9\u4E2A\u6570\u636E\u5E93\u4E0D\u4F46\u5B58\u50A8\u6570\u636E\u7684\u8282\u70B9\u4FE1\u606F\uFF0C\u8FD8\u5B58\u50A8\u6BCF\u4E2A\u6570\u636E\u8282\u70B9\u7684 ACL \u6743\u9650\u4FE1\u606F\u4EE5\u53CA stat \u72B6\u6001\u4FE1\u606F\u7B49\u3002</p><p>\u800C\u5728\u5E95\u5C42\u5B9E\u73B0\u4E2D\uFF0CZooKeeper \u6570\u636E\u6A21\u578B\u662F\u901A\u8FC7 DataTree \u7C7B\u6765\u5B9A\u4E49\u7684\u3002 DataTree \u7C7B\u5B9A\u4E49\u4E86\u4E00\u4E2A ZooKeeper \u6570\u636E\u7684\u5185\u5B58\u7ED3\u6784\u3002</p><p>DataTree \u7684\u5185\u90E8\u5B9A\u4E49\u7C7B nodes \u8282\u70B9\u7C7B\u578B\u3001root \u6839\u8282\u70B9\u4FE1\u606F\u3001\u5B50\u8282\u70B9\u7684 WatchManager \u76D1\u63A7\u4FE1\u606F\u7B49\u6570\u636E\u6A21\u578B\u4E2D\u7684\u76F8\u5173\u4FE1\u606F\u3002</p><p>\u53EF\u4EE5\u8BF4\uFF0C\u4E00\u4E2A DataTree \u7C7B\u5B9A\u4E49\u4E86 ZooKeeper \u5185\u5B58\u6570\u636E\u7684\u903B\u8F91\u7ED3\u6784\u3002</p><p>\u300C\u4E8B\u52A1\u65E5\u5FD7\u300D</p><p>\u4E3A\u4E86\u6574\u4E2A ZooKeeper \u96C6\u7FA4\u4E2D\u6570\u636E\u7684\u4E00\u81F4\u6027\uFF0CLeader \u670D\u52A1\u5668\u4F1A\u5411 ZooKeeper \u96C6\u7FA4\u4E2D\u7684\u5176\u4ED6\u89D2\u8272\u670D\u52A1\u53D1\u9001\u6570\u636E\u540C\u6B65\u4FE1\u606F\uFF0C\u5728\u63A5\u6536\u5230\u6570\u636E\u540C\u6B65\u4FE1\u606F\u540E\uFF0C ZooKeeper \u96C6\u7FA4\u4E2D\u7684 Follow \u548C Observer \u670D\u52A1\u5668\u5C31\u4F1A\u8FDB\u884C\u6570\u636E\u540C\u6B65\u3002</p><p>\u275D \u800C\u8FD9\u4E24\u79CD\u89D2\u8272\u670D\u52A1\u5668\u6240\u63A5\u6536\u5230\u7684\u4FE1\u606F\u5C31\u662F Leader \u670D\u52A1\u5668\u7684\u4E8B\u52A1\u65E5\u5FD7\u3002 \u275E \u5728\u63A5\u6536\u5230\u4E8B\u52A1\u65E5\u5FD7\u540E\uFF0C\u5E76\u5728\u672C\u5730\u670D\u52A1\u5668\u4E0A\u6267\u884C\u3002\u8FD9\u79CD\u6570\u636E\u540C\u6B65\u7684\u65B9\u5F0F\uFF0C\u907F\u514D\u4E86\u76F4\u63A5\u4F7F\u7528\u5B9E\u9645\u7684\u4E1A\u52A1\u6570\u636E\uFF0C\u51CF\u5C11\u4E86\u7F51\u7EDC\u4F20\u8F93\u7684\u5F00\u9500\uFF0C\u63D0\u5347\u4E86\u6574\u4E2A ZooKeeper \u96C6\u7FA4\u7684\u6267\u884C\u6027\u80FD\u3002</p><h2 id="\u56DB\u3001watch\u673A\u5236" tabindex="-1"><a class="header-anchor" href="#\u56DB\u3001watch\u673A\u5236" aria-hidden="true">#</a> \u56DB\u3001Watch\u673A\u5236</h2><p>ZooKeeper \u7684\u5BA2\u6237\u7AEF\u53EF\u4EE5\u901A\u8FC7 Watch \u673A\u5236\u6765\u8BA2\u9605\u5F53\u670D\u52A1\u5668\u4E0A\u67D0\u4E00\u8282\u70B9\u7684\u6570\u636E\u6216\u72B6\u6001\u53D1\u751F\u53D8\u5316\u65F6\u6536\u5230\u76F8\u5E94\u7684\u901A\u77E5\uFF1B</p><p><strong>\u300C\u5982\u4F55\u5B9E\u73B0\uFF1A\u300D</strong></p><p>\u6211\u4EEC\u53EF\u4EE5\u901A\u8FC7\u5411 ZooKeeper \u5BA2\u6237\u7AEF\u7684\u6784\u9020\u65B9\u6CD5\u4E2D\u4F20\u9012 Watcher \u53C2\u6570\u7684\u65B9\u5F0F\u5B9E\u73B0\uFF1A</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>new ZooKeeper(String connectString, int sessionTimeout, Watcher watcher)
+import{_ as t}from"./plugin-vue_export-helper.21dcd24c.js";import{r as a,o as i,c as d,a as p,b as r,d as e,e as l}from"./app.615e41d8.js";const s={},n=p("h1",{id:"\u53EF\u80FD\u662F\u628Azookeeper\u6982\u5FF5\u8BB2\u7684\u6700\u6E05\u695A\u7684\u4E00\u7BC7\u6587\u7AE0",tabindex:"-1"},[p("a",{class:"header-anchor",href:"#\u53EF\u80FD\u662F\u628Azookeeper\u6982\u5FF5\u8BB2\u7684\u6700\u6E05\u695A\u7684\u4E00\u7BC7\u6587\u7AE0","aria-hidden":"true"},"#"),e(" \u53EF\u80FD\u662F\u628AZooKeeper\u6982\u5FF5\u8BB2\u7684\u6700\u6E05\u695A\u7684\u4E00\u7BC7\u6587\u7AE0")],-1),c=e("\u6574\u7406\uFF1A\u6C89\u9ED8\u738B\u4E8C\uFF0C\u6233"),u={href:"https://mp.weixin.qq.com/s/-evZg0epRrOr1IwQ3GJ2Zg",target:"_blank",rel:"noopener noreferrer"},b=e("\u8F6C\u8F7D\u94FE\u63A5"),g=e("\uFF0C\u4F5C\u8005\uFF1A\u6708\u4F34\u98DE\u9C7C\uFF0C\u6233"),Z={href:"https://mp.weixin.qq.com/s/B2ngp0q5kdWsCNH8sw_5DA",target:"_blank",rel:"noopener noreferrer"},h=e("\u539F\u6587\u94FE\u63A5"),K=e("\u3002"),v=l(`<h2 id="\u4E00\u3001\u57FA\u672C\u4ECB\u7ECD" tabindex="-1"><a class="header-anchor" href="#\u4E00\u3001\u57FA\u672C\u4ECB\u7ECD" aria-hidden="true">#</a> \u4E00\u3001\u57FA\u672C\u4ECB\u7ECD</h2><p>Apache ZooKeeper \u662F\u7531Apache Hadoop\u7684\u5B50\u9879\u76EE\u53D1\u5C55\u800C\u6765\uFF0C\u4E3A\u5206\u5E03\u5F0F\u5E94\u7528\u63D0\u4F9B\u9AD8\u6548\u4E14\u53EF\u9760\u7684\u5206\u5E03\u5F0F\u534F\u8C03\u670D\u52A1\u3002</p><p>\u5728\u89E3\u51B3\u5206\u5E03\u5F0F\u6570\u636E\u4E00\u81F4\u6027\u65B9\u9762\uFF0CZK\u6CA1\u6709\u76F4\u63A5\u91C7\u7528Paxos\u7B97\u6CD5\uFF0C\u800C\u662F\u91C7\u7528\u4E86ZAB\uFF08ZooKeeper Atomic Broadcast\uFF09\u534F\u8BAE\u3002 ZK\u53EF\u4EE5\u63D0\u4F9B\u8BF8\u5982\u6570\u636E\u53D1\u5E03/\u8BA2\u9605\u3001\u8D1F\u8F7D\u5747\u8861\u3001\u547D\u540D\u670D\u52A1\u3001\u5206\u5E03\u5F0F\u534F\u8C03/\u901A\u77E5\uFF0C\u96C6\u7FA4\u7BA1\u7406\uFF0CMaster\u9009\u4E3E\uFF0C\u5206\u5E03\u5F0F\u9501\uFF0C\u5206\u5E03\u5F0F\u961F\u5217\u7B49\u529F\u80FD\u3002</p><p>\u300C\u5B83\u5177\u6709\u4EE5\u4E0B\u7279\u6027\uFF1A\u300D</p><ul><li>\u300C\u987A\u5E8F\u4E00\u81F4\u6027\u300D\uFF1A\u4ECE\u4E00\u4E2A\u5BA2\u6237\u7AEF\u53D1\u8D77\u7684\u4E8B\u52A1\u8BF7\u6C42\uFF0C\u6700\u7EC8\u90FD\u4F1A\u4E25\u683C\u6309\u7167\u5176\u53D1\u8D77\u987A\u5E8F\u88AB\u5E94\u7528\u5230 Zookeeper \u4E2D\uFF1B</li><li>\u300C\u539F\u5B50\u6027\u300D\uFF1A\u8981\u4E48\u6240\u6709\u5E94\u7528\uFF0C\u8981\u4E48\u4E0D\u5E94\u7528\uFF1B\u4E0D\u5B58\u5728\u90E8\u5206\u673A\u5668\u5E94\u7528\u4E86\u8BE5\u4E8B\u52A1\uFF0C\u800C\u300C\u53E6\u4E00\u90E8\u5206\u6CA1\u6709\u5E94\u7528\u300D\u7684\u60C5\u51B5\uFF1B</li><li>\u300C\u5355\u4E00\u89C6\u56FE\u300D\uFF1A\u6240\u6709\u5BA2\u6237\u7AEF\u770B\u5230\u7684\u670D\u52A1\u7AEF\u6570\u636E\u6A21\u578B\u90FD\u662F\u4E00\u81F4\u7684\uFF0C\u65E0\u8BBA\u5BA2\u6237\u8FDE\u63A5\u7684\u662F\u54EA\u4E2AZK\u670D\u52A1\u5668\uFF1B</li><li>\u300C\u53EF\u9760\u6027\u300D\uFF1A\u4E00\u65E6\u670D\u52A1\u7AEF\u6210\u529F\u5E94\u7528\u4E86\u4E00\u4E2A\u4E8B\u52A1\uFF0C\u5219\u5176\u5F15\u8D77\u7684\u6539\u53D8\u4F1A\u4E00\u76F4\u4FDD\u7559\uFF0C\u76F4\u5230\u88AB\u53E6\u5916\u4E00\u4E2A\u4E8B\u52A1\u6240\u66F4\u6539\uFF1B</li><li>\u300C\u5B9E\u65F6\u6027\u300D\uFF1A\u4E00\u65E6\u4E00\u4E2A\u4E8B\u52A1\u88AB\u6210\u529F\u5E94\u7528\u540E\uFF0CZookeeper \u53EF\u4EE5\u4FDD\u8BC1\u5BA2\u6237\u7AEF\u7ACB\u5373\u53EF\u4EE5\u8BFB\u53D6\u5230\u8FD9\u4E2A\u4E8B\u52A1\u53D8\u66F4\u540E\u7684\u6700\u65B0\u72B6\u6001\u7684\u6570\u636E\uFF08\u300C\u4E00\u6BB5\u65F6\u95F4\u300D\uFF09\u3002</li></ul><h2 id="\u4E8C\u3001\u6570\u636E\u6A21\u578B" tabindex="-1"><a class="header-anchor" href="#\u4E8C\u3001\u6570\u636E\u6A21\u578B" aria-hidden="true">#</a> \u4E8C\u3001\u6570\u636E\u6A21\u578B</h2><p>ZooKeeper \u4E2D\u7684\u6570\u636E\u6A21\u578B\u662F\u4E00\u79CD\u6811\u5F62\u7ED3\u6784\uFF0C\u975E\u5E38\u50CF\u7535\u8111\u4E2D\u7684\u6587\u4EF6\u7CFB\u7EDF\uFF0C\u6709\u4E00\u4E2A\u6839\u6587\u4EF6\u5939\uFF0C\u4E0B\u9762\u8FD8\u6709\u5F88\u591A\u5B50\u6587\u4EF6\u5939\u3002</p><ul><li><p>ZooKeeper\u7684\u6570\u636E\u6A21\u578B\u4E5F\u5177\u6709\u4E00\u4E2A\u56FA\u5B9A\u7684\u6839\u8282\u70B9<code>\uFF08/\uFF09</code>\uFF0C\u6211\u4EEC\u53EF\u4EE5\u5728\u6839\u8282\u70B9\u4E0B\u521B\u5EFA\u5B50\u8282\u70B9\uFF0C\u5E76\u5728\u5B50\u8282\u70B9\u4E0B\u7EE7\u7EED\u521B\u5EFA\u4E0B\u4E00\u7EA7\u8282\u70B9\u3002</p></li><li><p>ZooKeeper \u6811\u4E2D\u7684\u6BCF\u4E00\u5C42\u7EA7\u7528\u659C\u6760<code>\uFF08/\uFF09</code>\u5206\u9694\u5F00\uFF0C\u4E14\u53EA\u80FD\u7528\u7EDD\u5BF9\u8DEF\u5F84\uFF08\u5982<code>get /work/task</code>\uFF09\u7684\u65B9\u5F0F\u67E5\u8BE2 ZooKeeper \u8282\u70B9\uFF0C\u800C\u4E0D\u80FD\u4F7F\u7528\u76F8\u5BF9\u8DEF\u5F84\u3002</p></li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zookeeper/shujumoxing-1.png" alt=""></p><p><strong>\u300C\u4E3A\u4EC0\u4E48 ZooKeeper \u4E0D\u80FD\u91C7\u7528\u76F8\u5BF9\u8DEF\u5F84\u67E5\u627E\u8282\u70B9\u5462\uFF1F\u300D</strong></p><blockquote><p>\u275D</p><p>\u8FD9\u662F\u56E0\u4E3A ZooKeeper \u5927\u591A\u662F\u5E94\u7528\u573A\u666F\u662F\u5B9A\u4F4D\u6570\u636E\u6A21\u578B\u4E0A\u7684\u8282\u70B9\uFF0C\u5E76\u5728\u76F8\u5173\u8282\u70B9\u4E0A\u8FDB\u884C\u64CD\u4F5C\u3002</p><p>\u275E</p></blockquote><p>\u50CF\u8FD9\u79CD\u67E5\u627E\u4E0E\u7ED9\u5B9A\u503C\u76F8\u7B49\u7684\u8BB0\u5F55\u95EE\u9898\u6700\u9002\u5408\u7528\u6563\u5217\u6765\u89E3\u51B3\u3002</p><p>\u56E0\u6B64 ZooKeeper \u5728\u5E95\u5C42\u5B9E\u73B0\u7684\u65F6\u5019\uFF0C\u4F7F\u7528\u4E86\u4E00\u4E2A hashtable\uFF0C\u5373 <code>hashtableConcurrentHashMap&lt;String, DataNode&gt; nodes</code>\uFF0C\u7528\u8282\u70B9\u7684\u5B8C\u6574\u8DEF\u5F84\u6765\u4F5C\u4E3A key \u5B58\u50A8\u8282\u70B9\u6570\u636E\u3002</p><p>\u8FD9\u6837\u5C31\u5927\u5927\u63D0\u9AD8\u4E86 ZooKeeper \u7684\u6027\u80FD\u3002</p><p><strong>\u300C\u8282\u70B9\u7C7B\u578B\u300D</strong></p><p>ZooKeeper \u4E2D\u7684\u6570\u636E\u8282\u70B9\u4E5F\u5206\u4E3A\u6301\u4E45\u8282\u70B9\u3001\u4E34\u65F6\u8282\u70B9\u548C\u6709\u5E8F\u8282\u70B9\u4E09\u79CD\u7C7B\u578B\uFF1A</p><blockquote><p>\u275D</p><p>1\u3001\u6301\u4E45\u8282\u70B9</p><p>\u275E</p></blockquote><p>\u4E00\u65E6\u5C06\u8282\u70B9\u521B\u5EFA\u4E3A\u6301\u4E45\u8282\u70B9\uFF0C\u8BE5\u6570\u636E\u8282\u70B9\u4F1A\u4E00\u76F4\u5B58\u50A8\u5728 ZooKeeper \u670D\u52A1\u5668\u4E0A\uFF0C\u5373\u4F7F\u521B\u5EFA\u8BE5\u8282\u70B9\u7684\u5BA2\u6237\u7AEF\u4E0E\u670D\u52A1\u7AEF\u7684\u4F1A\u8BDD\u5173\u95ED\u4E86\uFF0C\u8BE5\u8282\u70B9\u4F9D\u7136\u4E0D\u4F1A\u88AB\u5220\u9664\u3002\u5982\u679C\u6211\u4EEC\u60F3\u5220\u9664\u6301\u4E45\u8282\u70B9\uFF0C\u5C31\u8981\u663E\u5F0F\u8C03\u7528 delete \u51FD\u6570\u8FDB\u884C\u5220\u9664\u64CD\u4F5C\u3002</p><blockquote><p>\u275D</p><p>2\u3001\u4E34\u65F6\u8282\u70B9</p><p>\u275E</p></blockquote><p>\u5982\u679C\u5C06\u8282\u70B9\u521B\u5EFA\u4E3A\u4E34\u65F6\u8282\u70B9\uFF0C\u90A3\u4E48\u8BE5\u8282\u70B9\u6570\u636E\u4E0D\u4F1A\u4E00\u76F4\u5B58\u50A8\u5728 ZooKeeper \u670D\u52A1\u5668\u4E0A\u3002</p><p>\u5F53\u521B\u5EFA\u8BE5\u4E34\u65F6\u8282\u70B9\u7684\u5BA2\u6237\u7AEF\u4F1A\u8BDD\u56E0\u8D85\u65F6\u6216\u53D1\u751F\u5F02\u5E38\u800C\u5173\u95ED\u65F6\uFF0C\u8BE5\u8282\u70B9\u4E5F\u76F8\u5E94\u5728 ZooKeeper \u670D\u52A1\u5668\u4E0A\u88AB\u5220\u9664\uFF0C\u540C\u6837\uFF0C\u6211\u4EEC\u53EF\u4EE5\u50CF\u5220\u9664\u6301\u4E45\u8282\u70B9\u4E00\u6837\u4E3B\u52A8\u5220\u9664\u4E34\u65F6\u8282\u70B9\u3002</p><p>\u5728\u5E73\u65F6\u7684\u5F00\u53D1\u4E2D\uFF0C\u6211\u4EEC\u53EF\u4EE5\u5229\u7528\u4E34\u65F6\u8282\u70B9\u7684\u8FD9\u4E00\u7279\u6027\u6765\u505A\u670D\u52A1\u5668\u96C6\u7FA4\u5185\u673A\u5668\u8FD0\u884C\u60C5\u51B5\u7684\u7EDF\u8BA1\uFF0C\u5C06\u96C6\u7FA4\u8BBE\u7F6E\u4E3A<code>/servers</code>\u8282\u70B9\uFF0C\u5E76\u4E3A\u96C6\u7FA4\u4E0B\u7684\u6BCF\u53F0\u670D\u52A1\u5668\u521B\u5EFA\u4E00\u4E2A\u4E34\u65F6\u8282\u70B9<code>/servers/host</code>\uFF0C\u5F53\u670D\u52A1\u5668\u4E0B\u7EBF\u65F6\u8BE5\u8282\u70B9\u81EA\u52A8\u88AB\u5220\u9664\uFF0C\u6700\u540E\u7EDF\u8BA1\u4E34\u65F6\u8282\u70B9\u4E2A\u6570\u5C31\u53EF\u4EE5\u77E5\u9053\u96C6\u7FA4\u4E2D\u7684\u8FD0\u884C\u60C5\u51B5\u3002</p><blockquote><p>\u275D</p><p>3\u3001\u6709\u5E8F\u8282\u70B9</p><p>\u275E</p></blockquote><p>\u8282\u70B9\u6709\u5E8F\u662F\u8BF4\u5728\u6211\u4EEC\u521B\u5EFA\u6709\u5E8F\u8282\u70B9\u7684\u65F6\u5019\uFF0CZooKeeper \u670D\u52A1\u5668\u4F1A\u81EA\u52A8\u4F7F\u7528\u4E00\u4E2A\u5355\u8C03\u9012\u589E\u7684\u6570\u5B57\u4F5C\u4E3A\u540E\u7F00\uFF0C\u8FFD\u52A0\u5230\u6211\u4EEC\u521B\u5EFA\u8282\u70B9\u7684\u540E\u8FB9\u3002</p><p>\u4F8B\u5982\u4E00\u4E2A\u5BA2\u6237\u7AEF\u521B\u5EFA\u4E86\u4E00\u4E2A\u8DEF\u5F84\u4E3A <code>works/task-</code>\u7684\u6709\u5E8F\u8282\u70B9\uFF0C\u90A3\u4E48 ZooKeeper \u5C06\u4F1A\u751F\u6210\u4E00\u4E2A\u5E8F\u53F7\u5E76\u8FFD\u52A0\u5230\u8BE5\u8282\u70B9\u7684\u8DEF\u5F84\u540E\uFF0C\u6700\u540E\u8BE5\u8282\u70B9\u7684\u8DEF\u5F84\u4E3A<code>works/task-1</code>\u3002</p><ul><li>\u901A\u8FC7\u8FD9\u79CD\u65B9\u5F0F\u6211\u4EEC\u53EF\u4EE5\u76F4\u89C2\u7684\u67E5\u770B\u5230\u8282\u70B9\u7684\u521B\u5EFA\u987A\u5E8F\u3002</li></ul><p>ZooKeeper \u4E2D\u7684\u6BCF\u4E2A\u8282\u70B9\u90FD\u7EF4\u62A4\u6709\u8FD9\u4E9B\u5185\u5BB9\uFF1A\u4E00\u4E2A\u4E8C\u8FDB\u5236\u6570\u7EC4<code>\uFF08byte data[]\uFF09</code>\uFF0C\u7528\u6765\u5B58\u50A8\u8282\u70B9\u7684\u6570\u636E\u3001ACL \u8BBF\u95EE\u63A7\u5236\u4FE1\u606F\u3001\u5B50\u8282\u70B9\u6570\u636E\uFF08\u56E0\u4E3A\u4E34\u65F6\u8282\u70B9\u4E0D\u5141\u8BB8\u6709\u5B50\u8282\u70B9\uFF0C\u6240\u4EE5\u5176\u5B50\u8282\u70B9\u5B57\u6BB5\u4E3A null\uFF09\uFF0C\u9664\u6B64\u4E4B\u5916\u6BCF\u4E2A\u6570\u636E\u8282\u70B9\u8FD8\u6709\u4E00\u4E2A\u8BB0\u5F55\u81EA\u8EAB\u72B6\u6001\u4FE1\u606F\u7684\u5B57\u6BB5 stat\u3002</p><p><strong>\u300C\u8282\u70B9\u7684\u72B6\u6001\u7ED3\u6784\u300D</strong></p><p>\u6267\u884C<code>stat /zk_test</code>\uFF0C\u53EF\u4EE5\u770B\u5230\u63A7\u5236\u53F0\u8F93\u51FA\u4E86\u4E00\u4E9B\u4FE1\u606F\uFF0C\u8FD9\u4E9B\u5C31\u662F\u8282\u70B9\u72B6\u6001\u4FE1\u606F\u3002</p><p>\u6BCF\u4E00\u4E2A\u8282\u70B9\u90FD\u6709\u4E00\u4E2A\u81EA\u5DF1\u7684\u72B6\u6001\u5C5E\u6027\uFF0C\u8BB0\u5F55\u4E86\u8282\u70B9\u672C\u8EAB\u7684\u4E00\u4E9B\u4FE1\u606F\uFF1A</p><table><thead><tr><th><strong>\u300C\u72B6\u6001\u5C5E\u6027\u300D</strong></th><th><strong>\u300C\u8BF4\u660E\u300D</strong></th></tr></thead><tbody><tr><td>czxid</td><td>\u6570\u636E\u8282\u70B9\u521B\u5EFA\u65F6\u7684\u4E8B\u52A1 ID</td></tr><tr><td>ctime</td><td>\u6570\u636E\u8282\u70B9\u521B\u5EFA\u65F6\u7684\u65F6\u95F4</td></tr><tr><td>mzxid</td><td>\u6570\u636E\u8282\u70B9\u6700\u540E\u4E00\u6B21\u66F4\u65B0\u65F6\u7684\u4E8B\u52A1 ID</td></tr><tr><td>mtime</td><td>\u6570\u636E\u8282\u70B9\u6700\u540E\u4E00\u6B21\u66F4\u65B0\u65F6\u7684\u65F6\u95F4</td></tr><tr><td>pzxid</td><td>\u6570\u636E\u8282\u70B9\u7684\u5B50\u8282\u70B9\u6700\u540E\u4E00\u6B21\u88AB\u4FEE\u6539\u65F6\u7684\u4E8B\u52A1 ID</td></tr><tr><td><strong>\u300Ccversion\u300D</strong></td><td><strong>\u300C\u5B50\u8282\u70B9\u7684\u7248\u672C\u300D</strong></td></tr><tr><td><strong>\u300Cversion\u300D</strong></td><td><strong>\u300C\u5F53\u524D\u8282\u70B9\u6570\u636E\u7684\u7248\u672C\u300D</strong></td></tr><tr><td><strong>\u300Caversion\u300D</strong></td><td><strong>\u300C\u8282\u70B9\u7684 ACL \u7684\u7248\u672C\u300D</strong></td></tr><tr><td>ephemeralOwner</td><td>\u5982\u679C\u8282\u70B9\u662F\u4E34\u65F6\u8282\u70B9\uFF0C\u5219\u8868\u793A\u521B\u5EFA\u8BE5\u8282\u70B9\u7684\u4F1A\u8BDD\u7684 SessionID\uFF1B\u5982\u679C\u8282\u70B9\u662F\u6301\u4E45\u8282\u70B9\uFF0C\u5219\u8BE5\u5C5E\u6027\u503C\u4E3A 0</td></tr><tr><td>dataLength</td><td>\u6570\u636E\u5185\u5BB9\u7684\u957F\u5EA6</td></tr><tr><td>numChildren</td><td>\u6570\u636E\u8282\u70B9\u5F53\u524D\u7684\u5B50\u8282\u70B9\u4E2A\u6570</td></tr></tbody></table><p><strong>\u300C\u6570\u636E\u8282\u70B9\u7684\u7248\u672C\u300D</strong></p><p>\u5728 ZooKeeper \u4E2D\u4E3A\u6570\u636E\u8282\u70B9\u5F15\u5165\u4E86\u7248\u672C\u7684\u6982\u5FF5\uFF0C\u6BCF\u4E2A\u6570\u636E\u8282\u70B9\u6709 3 \u79CD\u7C7B\u578B\u7684\u7248\u672C\u4FE1\u606F\uFF0C\u5BF9\u6570\u636E\u8282\u70B9\u7684\u4EFB\u4F55\u66F4\u65B0\u64CD\u4F5C\u90FD\u4F1A\u5F15\u8D77\u7248\u672C\u53F7\u7684\u53D8\u5316\u3002</p><p>ZooKeeper \u7684\u7248\u672C\u4FE1\u606F\u8868\u793A\u7684\u662F\u5BF9\u8282\u70B9\u6570\u636E\u5185\u5BB9\u3001\u5B50\u8282\u70B9\u4FE1\u606F\u6216\u8005\u662F ACL \u4FE1\u606F\u7684\u4FEE\u6539\u6B21\u6570\u3002</p><h2 id="\u4E09\u3001\u6570\u636E\u5B58\u50A8" tabindex="-1"><a class="header-anchor" href="#\u4E09\u3001\u6570\u636E\u5B58\u50A8" aria-hidden="true">#</a> \u4E09\u3001\u6570\u636E\u5B58\u50A8</h2><p>\u4ECE\u5B58\u50A8\u4F4D\u7F6E\u4E0A\u6765\u8BF4\uFF0C\u4E8B\u52A1\u65E5\u5FD7\u548C\u6570\u636E\u5FEB\u7167\u4E00\u6837\uFF0C\u90FD\u5B58\u50A8\u5728\u672C\u5730\u78C1\u76D8\u4E0A\uFF1B\u800C\u4ECE\u4E1A\u52A1\u89D2\u5EA6\u6765\u8BB2\uFF0C\u5185\u5B58\u6570\u636E\u5C31\u662F\u6211\u4EEC\u521B\u5EFA\u6570\u636E\u8282\u70B9\u3001\u6DFB\u52A0\u76D1\u63A7\u7B49\u8BF7\u6C42\u65F6\u76F4\u63A5\u64CD\u4F5C\u7684\u6570\u636E\u3002</p><p>\u4E8B\u52A1\u65E5\u5FD7\u6570\u636E\u4E3B\u8981\u7528\u4E8E\u8BB0\u5F55\u672C\u5730\u4E8B\u52A1\u6027\u4F1A\u8BDD\u64CD\u4F5C\uFF0C\u7528\u4E8E ZooKeeper \u96C6\u7FA4\u670D\u52A1\u5668\u4E4B\u95F4\u7684\u6570\u636E\u540C\u6B65\u3002</p><p>\u4E8B\u52A1\u5FEB\u7167\u5219\u662F\u5C06\u5185\u5B58\u6570\u636E\u6301\u4E45\u5316\u5230\u672C\u5730\u78C1\u76D8\u3002</p><p>\u275D \u8FD9\u91CC\u8981\u6CE8\u610F\u7684\u4E00\u70B9\u662F\uFF0C\u6570\u636E\u5FEB\u7167\u662F\u6BCF\u95F4\u9694\u4E00\u6BB5\u65F6\u95F4\u624D\u628A\u5185\u5B58\u6570\u636E\u5B58\u50A8\u5230\u672C\u5730\u78C1\u76D8\uFF0C\u56E0\u6B64\u6570\u636E\u5E76\u4E0D\u4F1A\u4E00\u76F4\u4E0E\u5185\u5B58\u6570\u636E\u4FDD\u6301\u4E00\u81F4\u3002 \u275E \u5728\u5355\u53F0 ZooKeeper \u670D\u52A1\u5668\u8FD0\u884C\u8FC7\u7A0B\u4E2D\u56E0\u4E3A\u5F02\u5E38\u800C\u5173\u95ED\u65F6\uFF0C\u53EF\u80FD\u4F1A\u51FA\u73B0\u6570\u636E\u4E22\u5931\u7B49\u60C5\u51B5\u3002</p><p>\u300C\u5185\u5B58\u6570\u636E\u300D</p><p>ZooKeeper \u7684\u6570\u636E\u6A21\u578B\u53EF\u4EE5\u770B\u4F5C\u4E00\u68F5\u6811\u5F62\u7ED3\u6784\uFF0C\u800C\u6570\u636E\u8282\u70B9\u5C31\u662F\u8FD9\u68F5\u6811\u4E0A\u7684\u53F6\u5B50\u8282\u70B9\u3002</p><p>\u4ECE\u6570\u636E\u5B58\u50A8\u7684\u89D2\u5EA6\u770B\uFF0CZooKeeper \u7684\u6570\u636E\u6A21\u578B\u662F\u5B58\u50A8\u5728\u5185\u5B58\u4E2D\u7684\u3002</p><p>\u6211\u4EEC\u53EF\u4EE5\u628A ZooKeeper \u7684\u6570\u636E\u6A21\u578B\u770B\u4F5C\u662F\u5B58\u50A8\u5728\u5185\u5B58\u4E2D\u7684\u6570\u636E\u5E93\uFF0C\u800C\u8FD9\u4E2A\u6570\u636E\u5E93\u4E0D\u4F46\u5B58\u50A8\u6570\u636E\u7684\u8282\u70B9\u4FE1\u606F\uFF0C\u8FD8\u5B58\u50A8\u6BCF\u4E2A\u6570\u636E\u8282\u70B9\u7684 ACL \u6743\u9650\u4FE1\u606F\u4EE5\u53CA stat \u72B6\u6001\u4FE1\u606F\u7B49\u3002</p><p>\u800C\u5728\u5E95\u5C42\u5B9E\u73B0\u4E2D\uFF0CZooKeeper \u6570\u636E\u6A21\u578B\u662F\u901A\u8FC7 DataTree \u7C7B\u6765\u5B9A\u4E49\u7684\u3002 DataTree \u7C7B\u5B9A\u4E49\u4E86\u4E00\u4E2A ZooKeeper \u6570\u636E\u7684\u5185\u5B58\u7ED3\u6784\u3002</p><p>DataTree \u7684\u5185\u90E8\u5B9A\u4E49\u7C7B nodes \u8282\u70B9\u7C7B\u578B\u3001root \u6839\u8282\u70B9\u4FE1\u606F\u3001\u5B50\u8282\u70B9\u7684 WatchManager \u76D1\u63A7\u4FE1\u606F\u7B49\u6570\u636E\u6A21\u578B\u4E2D\u7684\u76F8\u5173\u4FE1\u606F\u3002</p><p>\u53EF\u4EE5\u8BF4\uFF0C\u4E00\u4E2A DataTree \u7C7B\u5B9A\u4E49\u4E86 ZooKeeper \u5185\u5B58\u6570\u636E\u7684\u903B\u8F91\u7ED3\u6784\u3002</p><p>\u300C\u4E8B\u52A1\u65E5\u5FD7\u300D</p><p>\u4E3A\u4E86\u6574\u4E2A ZooKeeper \u96C6\u7FA4\u4E2D\u6570\u636E\u7684\u4E00\u81F4\u6027\uFF0CLeader \u670D\u52A1\u5668\u4F1A\u5411 ZooKeeper \u96C6\u7FA4\u4E2D\u7684\u5176\u4ED6\u89D2\u8272\u670D\u52A1\u53D1\u9001\u6570\u636E\u540C\u6B65\u4FE1\u606F\uFF0C\u5728\u63A5\u6536\u5230\u6570\u636E\u540C\u6B65\u4FE1\u606F\u540E\uFF0C ZooKeeper \u96C6\u7FA4\u4E2D\u7684 Follow \u548C Observer \u670D\u52A1\u5668\u5C31\u4F1A\u8FDB\u884C\u6570\u636E\u540C\u6B65\u3002</p><p>\u275D \u800C\u8FD9\u4E24\u79CD\u89D2\u8272\u670D\u52A1\u5668\u6240\u63A5\u6536\u5230\u7684\u4FE1\u606F\u5C31\u662F Leader \u670D\u52A1\u5668\u7684\u4E8B\u52A1\u65E5\u5FD7\u3002 \u275E \u5728\u63A5\u6536\u5230\u4E8B\u52A1\u65E5\u5FD7\u540E\uFF0C\u5E76\u5728\u672C\u5730\u670D\u52A1\u5668\u4E0A\u6267\u884C\u3002\u8FD9\u79CD\u6570\u636E\u540C\u6B65\u7684\u65B9\u5F0F\uFF0C\u907F\u514D\u4E86\u76F4\u63A5\u4F7F\u7528\u5B9E\u9645\u7684\u4E1A\u52A1\u6570\u636E\uFF0C\u51CF\u5C11\u4E86\u7F51\u7EDC\u4F20\u8F93\u7684\u5F00\u9500\uFF0C\u63D0\u5347\u4E86\u6574\u4E2A ZooKeeper \u96C6\u7FA4\u7684\u6267\u884C\u6027\u80FD\u3002</p><h2 id="\u56DB\u3001watch\u673A\u5236" tabindex="-1"><a class="header-anchor" href="#\u56DB\u3001watch\u673A\u5236" aria-hidden="true">#</a> \u56DB\u3001Watch\u673A\u5236</h2><p>ZooKeeper \u7684\u5BA2\u6237\u7AEF\u53EF\u4EE5\u901A\u8FC7 Watch \u673A\u5236\u6765\u8BA2\u9605\u5F53\u670D\u52A1\u5668\u4E0A\u67D0\u4E00\u8282\u70B9\u7684\u6570\u636E\u6216\u72B6\u6001\u53D1\u751F\u53D8\u5316\u65F6\u6536\u5230\u76F8\u5E94\u7684\u901A\u77E5\uFF1B</p><p><strong>\u300C\u5982\u4F55\u5B9E\u73B0\uFF1A\u300D</strong></p><p>\u6211\u4EEC\u53EF\u4EE5\u901A\u8FC7\u5411 ZooKeeper \u5BA2\u6237\u7AEF\u7684\u6784\u9020\u65B9\u6CD5\u4E2D\u4F20\u9012 Watcher \u53C2\u6570\u7684\u65B9\u5F0F\u5B9E\u73B0\uFF1A</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>new ZooKeeper(String connectString, int sessionTimeout, Watcher watcher)
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>\u4E0A\u9762\u4EE3\u7801\u7684\u610F\u601D\u662F\u5B9A\u4E49\u4E86\u4E00\u4E2A\u4E86 ZooKeeper \u5BA2\u6237\u7AEF\u5BF9\u8C61\u5B9E\u4F8B\uFF0C\u5E76\u4F20\u5165\u4E09\u4E2A\u53C2\u6570\uFF1A</p><ul><li><p>connectString \u670D\u52A1\u7AEF\u5730\u5740</p></li><li><p>sessionTimeout\uFF1A\u8D85\u65F6\u65F6\u95F4</p></li><li><p>Watcher\uFF1A\u76D1\u63A7\u4E8B\u4EF6</p></li></ul><p>\u8FD9\u4E2A Watcher \u5C06\u4F5C\u4E3A\u6574\u4E2A ZooKeeper \u4F1A\u8BDD\u671F\u95F4\u7684\u4E0A\u4E0B\u6587 \uFF0C\u4E00\u76F4\u88AB\u4FDD\u5B58\u5728\u5BA2\u6237\u7AEF ZKWatchManager \u7684 defaultWatcher \u4E2D\u3002</p><p>\u9664\u6B64\u4E4B\u5916\uFF0CZooKeeper \u5BA2\u6237\u7AEF\u4E5F\u53EF\u4EE5\u901A\u8FC7 getData\u3001exists \u548C getChildren \u4E09\u4E2A\u63A5\u53E3\u6765\u5411 ZooKeeper \u670D\u52A1\u5668\u6CE8\u518C Watcher\uFF0C\u4ECE\u800C\u65B9\u4FBF\u5730\u5728\u4E0D\u540C\u7684\u60C5\u51B5\u4E0B\u6DFB\u52A0 Watch \u4E8B\u4EF6\uFF1A</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>getData(String path, Watcher watcher, Stat stat)
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>\u89E6\u53D1\u901A\u77E5\u7684\u6761\u4EF6\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zookeeper/watch-1.png" alt=""></p><p>\u4E0A\u56FE\u4E2D\u5217\u51FA\u4E86\u5BA2\u6237\u7AEF\u5728\u4E0D\u540C\u4F1A\u8BDD\u72B6\u6001\u4E0B\uFF0C\u76F8\u5E94\u7684\u5728\u670D\u52A1\u5668\u8282\u70B9\u6240\u80FD\u652F\u6301\u7684\u4E8B\u4EF6\u7C7B\u578B\u3002</p><ul><li>\u4F8B\u5982\u5728\u5BA2\u6237\u7AEF\u8FDE\u63A5\u670D\u52A1\u7AEF\u7684\u65F6\u5019\uFF0C\u53EF\u4EE5\u5BF9\u6570\u636E\u8282\u70B9\u7684\u521B\u5EFA\u3001\u5220\u9664\u3001\u6570\u636E\u53D8\u66F4\u3001\u5B50\u8282\u70B9\u7684\u66F4\u65B0\u7B49\u64CD\u4F5C\u8FDB\u884C\u76D1\u63A7\u3002</li></ul><p><strong>\u300C\u5F53\u670D\u52A1\u7AEF\u67D0\u4E00\u8282\u70B9\u53D1\u751F\u6570\u636E\u53D8\u66F4\u64CD\u4F5C\u65F6\uFF0C\u6240\u6709\u66FE\u7ECF\u8BBE\u7F6E\u4E86\u8BE5\u8282\u70B9\u76D1\u63A7\u4E8B\u4EF6\u7684\u5BA2\u6237\u7AEF\u90FD\u4F1A\u6536\u5230\u670D\u52A1\u5668\u7684\u901A\u77E5\u5417\uFF1F\u300D</strong></p><p>\u7B54\u6848\u662F\u5426\u5B9A\u7684\uFF0CWatch \u4E8B\u4EF6\u7684\u89E6\u53D1\u673A\u5236\u53D6\u51B3\u4E8E\u4F1A\u8BDD\u7684\u8FDE\u63A5\u72B6\u6001\u548C\u5BA2\u6237\u7AEF\u6CE8\u518C\u4E8B\u4EF6\u7684\u7C7B\u578B\uFF0C\u6240\u4EE5\u5F53\u5BA2\u6237\u7AEF\u4F1A\u8BDD\u72B6\u6001\u6216\u6570\u636E\u8282\u70B9\u53D1\u751F\u6539\u53D8\u65F6\uFF0C\u90FD\u4F1A\u89E6\u53D1\u5BF9\u5E94\u7684 Watch \u4E8B\u4EF6\u3002</p><p><strong>\u300C\u8BA2\u9605\u53D1\u5E03\u573A\u666F\u5B9E\u73B0\u300D</strong></p><blockquote><p>\u275D</p><p>\u63D0\u5230 ZooKeeper \u7684\u5E94\u7528\u573A\u666F\uFF0C\u4F60\u53EF\u80FD\u7B2C\u4E00\u65F6\u95F4\u4F1A\u60F3\u5230\u6700\u4E3A\u5178\u578B\u7684\u53D1\u5E03\u8BA2\u9605\u529F\u80FD\u3002</p><p>\u275E</p></blockquote><p>\u53D1\u5E03\u8BA2\u9605\u529F\u80FD\u53EF\u4EE5\u770B\u4F5C\u662F\u4E00\u4E2A\u4E00\u5BF9\u591A\u7684\u5173\u7CFB\uFF0C\u5373\u4E00\u4E2A\u670D\u52A1\u6216\u6570\u636E\u7684\u53D1\u5E03\u8005\u53EF\u4EE5\u88AB\u591A\u4E2A\u4E0D\u540C\u7684\u6D88\u8D39\u8005\u8C03\u7528\u3002</p><p>\u4E00\u822C\u4E00\u4E2A\u53D1\u5E03\u8BA2\u9605\u6A21\u5F0F\u7684\u6570\u636E\u4EA4\u4E92\u53EF\u4EE5\u5206\u4E3A\u6D88\u8D39\u8005\u4E3B\u52A8\u8BF7\u6C42\u751F\u4EA7\u8005\u4FE1\u606F\u7684\u62C9\u53D6\u6A21\u5F0F\uFF0C\u548C\u751F\u4EA7\u8005\u6570\u636E\u53D8\u66F4\u65F6\u4E3B\u52A8\u63A8\u9001\u7ED9\u6D88\u8D39\u8005\u7684\u63A8\u9001\u6A21\u5F0F\u3002</p><p>ZooKeeper \u91C7\u7528\u4E86\u4E24\u79CD\u6A21\u5F0F\u7ED3\u5408\u7684\u65B9\u5F0F\u5B9E\u73B0\u8BA2\u9605\u53D1\u5E03\u529F\u80FD\u3002</p><blockquote><p>\u275D</p><p>\u4E0B\u9762\u6211\u4EEC\u6765\u5206\u6790\u4E00\u4E2A\u5177\u4F53\u6848\u4F8B\uFF1A</p><p>\u275E</p></blockquote><p>\u5728\u7CFB\u7EDF\u5F00\u53D1\u7684\u8FC7\u7A0B\u4E2D\u4F1A\u7528\u5230\u5404\u79CD\u5404\u6837\u7684\u914D\u7F6E\u4FE1\u606F\uFF0C\u5982\u6570\u636E\u5E93\u914D\u7F6E\u9879\u3001\u7B2C\u4E09\u65B9\u63A5\u53E3\u3001\u670D\u52A1\u5730\u5740\u7B49\uFF0C\u8FD9\u4E9B\u914D\u7F6E\u64CD\u4F5C\u5728\u6211\u4EEC\u5F00\u53D1\u8FC7\u7A0B\u4E2D\u5F88\u5BB9\u6613\u5B8C\u6210\uFF0C\u4F46\u662F\u653E\u5230\u4E00\u4E2A\u5927\u89C4\u6A21\u7684\u96C6\u7FA4\u4E2D\u914D\u7F6E\u8D77\u6765\u5C31\u6BD4\u8F83\u9EBB\u70E6\u4E86\u3002</p><p>\u901A\u5E38\u8FD9\u79CD\u96C6\u7FA4\u4E2D\uFF0C\u6211\u4EEC\u53EF\u4EE5\u7528\u914D\u7F6E\u7BA1\u7406\u529F\u80FD\u81EA\u52A8\u5B8C\u6210\u670D\u52A1\u5668\u914D\u7F6E\u4FE1\u606F\u7684\u7EF4\u62A4\uFF0C\u5229\u7528ZooKeeper \u7684\u53D1\u5E03\u8BA2\u9605\u529F\u80FD\u5C31\u80FD\u89E3\u51B3\u8FD9\u4E2A\u95EE\u9898\u3002</p><p>\u6211\u4EEC\u53EF\u4EE5\u628A\u8BF8\u5982\u6570\u636E\u5E93\u914D\u7F6E\u9879\u8FD9\u6837\u7684\u4FE1\u606F\u5B58\u50A8\u5728 ZooKeeper \u6570\u636E\u8282\u70B9\u4E2D\u3002</p><p>\u5982<code>/confs/data_item1</code>\u3002</p><ul><li><p>\u670D\u52A1\u5668\u96C6\u7FA4\u5BA2\u6237\u7AEF\u5BF9\u8BE5\u8282\u70B9\u6DFB\u52A0 Watch \u4E8B\u4EF6\u76D1\u63A7\uFF0C\u5F53\u96C6\u7FA4\u4E2D\u7684\u670D\u52A1\u542F\u52A8\u65F6\uFF0C\u4F1A\u8BFB\u53D6\u8BE5\u8282\u70B9\u6570\u636E\u83B7\u53D6\u6570\u636E\u914D\u7F6E\u4FE1\u606F\u3002</p></li><li><p>\u800C\u5F53\u8BE5\u8282\u70B9\u6570\u636E\u53D1\u751F\u53D8\u5316\u65F6\uFF0CZooKeeper \u670D\u52A1\u5668\u4F1A\u53D1\u9001 Watch \u4E8B\u4EF6\u7ED9\u5404\u4E2A\u5BA2\u6237\u7AEF\uFF0C\u96C6\u7FA4\u4E2D\u7684\u5BA2\u6237\u7AEF\u5728\u63A5\u6536\u5230\u8BE5\u901A\u77E5\u540E\uFF0C\u91CD\u65B0\u8BFB\u53D6\u8282\u70B9\u7684\u6570\u636E\u5E93\u914D\u7F6E\u4FE1\u606F\u3002</p></li></ul><p>\u6211\u4EEC\u4F7F\u7528 Watch \u673A\u5236\u5B9E\u73B0\u4E86\u4E00\u4E2A\u5206\u5E03\u5F0F\u73AF\u5883\u4E0B\u7684\u914D\u7F6E\u7BA1\u7406\u529F\u80FD\uFF0C\u901A\u8FC7\u5BF9 ZooKeeper \u670D\u52A1\u5668\u8282\u70B9\u6DFB\u52A0\u6570\u636E\u53D8\u66F4\u4E8B\u4EF6\uFF0C\u5B9E\u73B0\u5F53\u6570\u636E\u5E93\u914D\u7F6E\u9879\u4FE1\u606F\u53D8\u66F4\u540E\uFF0C\u96C6\u7FA4\u4E2D\u7684\u5404\u4E2A\u5BA2\u6237\u7AEF\u80FD\u63A5\u6536\u5230\u8BE5\u53D8\u66F4\u4E8B\u4EF6\u7684\u901A\u77E5\uFF0C\u5E76\u83B7\u53D6\u6700\u65B0\u7684\u914D\u7F6E\u4FE1\u606F\u3002</p><blockquote><p>\u275D</p><p>\u8981\u6CE8\u610F\u4E00\u70B9\u662F\uFF0C\u6211\u4EEC\u63D0\u5230 Watch \u5177\u6709\u4E00\u6B21\u6027\uFF0C\u6240\u4EE5\u5F53\u6211\u4EEC\u83B7\u5F97\u670D\u52A1\u5668\u901A\u77E5\u540E\u8981\u518D\u6B21\u6DFB\u52A0 Watch \u4E8B\u4EF6\u3002</p><p>\u275E</p></blockquote><h2 id="\u4E94\u3001\u4F1A\u8BDD\u673A\u5236" tabindex="-1"><a class="header-anchor" href="#\u4E94\u3001\u4F1A\u8BDD\u673A\u5236" aria-hidden="true">#</a> \u4E94\u3001\u4F1A\u8BDD\u673A\u5236</h2><p>ZooKeeper \u7684\u5DE5\u4F5C\u65B9\u5F0F\u4E00\u822C\u662F\u901A\u8FC7\u5BA2\u6237\u7AEF\u5411\u670D\u52A1\u7AEF\u53D1\u9001\u8BF7\u6C42\u800C\u5B9E\u73B0\u7684\u3002</p><p>\u800C\u5728\u4E00\u4E2A\u8BF7\u6C42\u7684\u53D1\u9001\u8FC7\u7A0B\u4E2D\uFF0C\u9996\u5148\uFF0C\u5BA2\u6237\u7AEF\u8981\u4E0E\u670D\u52A1\u7AEF\u8FDB\u884C\u8FDE\u63A5\uFF0C\u800C\u4E00\u4E2A\u8FDE\u63A5\u5C31\u662F\u4E00\u4E2A\u4F1A\u8BDD\u3002</p><blockquote><p>\u275D</p><p>\u5728 ZooKeeper \u4E2D\uFF0C\u4E00\u4E2A\u4F1A\u8BDD\u53EF\u4EE5\u770B\u4F5C\u662F\u4E00\u4E2A\u7528\u4E8E\u8868\u793A\u5BA2\u6237\u7AEF\u4E0E\u670D\u52A1\u5668\u7AEF\u8FDE\u63A5\u7684\u6570\u636E\u7ED3\u6784 Session\u3002</p><p>\u275E</p></blockquote><p>\u8FD9\u4E2A\u6570\u636E\u7ED3\u6784\u7531\u4E09\u4E2A\u90E8\u5206\u7EC4\u6210\uFF1A\u5206\u522B\u662F\u4F1A\u8BDD ID\uFF08sessionID\uFF09\u3001\u4F1A\u8BDD\u8D85\u65F6\u65F6\u95F4\uFF08TimeOut\uFF09\u3001\u4F1A\u8BDD\u5173\u95ED\u72B6\u6001\uFF08isClosing\uFF09</p><ul><li><p>\u4F1A\u8BDD ID\uFF1A\u4F1A\u8BDD ID \u4F5C\u4E3A\u4E00\u4E2A\u4F1A\u8BDD\u7684\u6807\u8BC6\u7B26\uFF0C\u5F53\u6211\u4EEC\u521B\u5EFA\u4E00\u6B21\u4F1A\u8BDD\u7684\u65F6\u5019\uFF0CZooKeeper \u4F1A\u81EA\u52A8\u4E3A\u5176\u5206\u914D\u4E00\u4E2A\u552F\u4E00\u7684 ID \u7F16\u7801\u3002</p></li><li><p>\u4F1A\u8BDD\u8D85\u65F6\u65F6\u95F4\uFF1A\u4E00\u822C\u6765\u8BF4\uFF0C\u4E00\u4E2A\u4F1A\u8BDD\u7684\u8D85\u65F6\u65F6\u95F4\u5C31\u662F\u6307\u4E00\u6B21\u4F1A\u8BDD\u4ECE\u53D1\u8D77\u540E\u5230\u88AB\u670D\u52A1\u5668\u5173\u95ED\u7684\u65F6\u957F\u3002\u800C\u8BBE\u7F6E\u4F1A\u8BDD\u8D85\u65F6\u65F6\u95F4\u540E\uFF0C\u670D\u52A1\u5668\u4F1A\u53C2\u8003\u8BBE\u7F6E\u7684\u8D85\u65F6\u65F6\u95F4\uFF0C\u6700\u7EC8\u8BA1\u7B97\u4E00\u4E2A\u670D\u52A1\u7AEF\u81EA\u5DF1\u7684\u8D85\u65F6\u65F6\u95F4\u3002\u800C\u8FD9\u4E2A\u8D85\u65F6\u65F6\u95F4\u5219\u662F\u6700\u7EC8\u771F\u6B63\u7528\u4E8E ZooKeeper \u4E2D\u670D\u52A1\u7AEF\u7528\u6237\u4F1A\u8BDD\u7BA1\u7406\u7684\u8D85\u65F6\u65F6\u95F4\u3002</p></li><li><p>\u4F1A\u8BDD\u5173\u95ED\u72B6\u6001\uFF1A\u4F1A\u8BDD\u5173\u95ED isClosing \u72B6\u6001\u5C5E\u6027\u5B57\u6BB5\u8868\u793A\u4E00\u4E2A\u4F1A\u8BDD\u662F\u5426\u5DF2\u7ECF\u5173\u95ED\u3002\u5982\u679C\u670D\u52A1\u5668\u68C0\u67E5\u5230\u4E00\u4E2A\u4F1A\u8BDD\u5DF2\u7ECF\u56E0\u4E3A\u8D85\u65F6\u7B49\u539F\u56E0\u5931\u6548\u65F6\uFF0C ZooKeeper \u4F1A\u5728\u8BE5\u4F1A\u8BDD\u7684 isClosing \u5C5E\u6027\u503C\u6807\u8BB0\u4E3A\u5173\u95ED\uFF0C\u518D\u4E4B\u540E\u5C31\u4E0D\u5BF9\u8BE5\u4F1A\u8BDD\u8FDB\u884C\u64CD\u4F5C\u4E86\u3002</p></li></ul><p><strong>\u300C\u4F1A\u8BDD\u72B6\u6001\u300D</strong></p><p>\u5728 ZooKeeper \u670D\u52A1\u7684\u8FD0\u884C\u8FC7\u7A0B\u4E2D\uFF0C\u4F1A\u8BDD\u4F1A\u7ECF\u5386\u4E0D\u540C\u7684\u72B6\u6001\u53D8\u5316\u3002</p><p>\u8FD9\u4E9B\u72B6\u6001\u5305\u62EC\uFF1A</p><blockquote><p>\u275D</p><p>\u6B63\u5728\u8FDE\u63A5\uFF08CONNECTING\uFF09\u3001\u5DF2\u7ECF\u8FDE\u63A5\uFF08CONNECTIED\uFF09\u3001\u6B63\u5728\u91CD\u65B0\u8FDE\u63A5\uFF08RECONNECTING\uFF09\u3001\u5DF2\u7ECF\u91CD\u65B0\u8FDE\u63A5\uFF08RECONNECTED\uFF09\u3001\u4F1A\u8BDD\u5173\u95ED\uFF08CLOSE\uFF09\u7B49\u3002</p><p>\u275E</p></blockquote><p>\u5F53\u5BA2\u6237\u7AEF\u5F00\u59CB\u521B\u5EFA\u4E00\u4E2A\u4E0E\u670D\u52A1\u7AEF\u7684\u4F1A\u8BDD\u64CD\u4F5C\u65F6\uFF0C\u5B83\u7684\u4F1A\u8BDD\u72B6\u6001\u5C31\u4F1A\u53D8\u6210 CONNECTING\uFF0C\u4E4B\u540E\u5BA2\u6237\u7AEF\u4F1A\u6839\u636E\u670D\u52A1\u5668\u5730\u5740\u5217\u8868\u4E2D\u7684\u670D\u52A1\u5668 IP \u5730\u5740\u5206\u522B\u5C1D\u8BD5\u8FDB\u884C\u8FDE\u63A5\u3002\u5982\u679C\u9047\u5230\u4E00\u4E2A IP \u5730\u5740\u53EF\u4EE5\u8FDE\u63A5\u5230\u670D\u52A1\u5668\uFF0C\u90A3\u4E48\u5BA2\u6237\u7AEF\u4F1A\u8BDD\u72B6\u6001\u5C06\u53D8\u4E3A CONNECTIED\u3002</p><p>\u5982\u679C\u56E0\u4E3A\u7F51\u7EDC\u539F\u56E0\u9020\u6210\u5DF2\u7ECF\u8FDE\u63A5\u7684\u5BA2\u6237\u7AEF\u4F1A\u8BDD\u65AD\u5F00\u65F6\uFF0C\u5BA2\u6237\u7AEF\u4F1A\u91CD\u65B0\u5C1D\u8BD5\u8FDE\u63A5\u670D\u52A1\u7AEF\u3002\u800C\u5BF9\u5E94\u7684\u5BA2\u6237\u7AEF\u4F1A\u8BDD\u72B6\u6001\u53C8\u53D8\u6210 CONNECTING \uFF0C\u76F4\u5230\u8BE5\u4F1A\u8BDD\u8FDE\u63A5\u5230\u670D\u52A1\u7AEF\u6700\u7EC8\u53C8\u53D8\u6210 CONNECTIED\u3002</p><blockquote><p>\u275D</p><p>\u5728 ZooKeeper \u670D\u52A1\u7684\u6574\u4E2A\u8FD0\u884C\u8FC7\u7A0B\u4E2D\uFF0C\u4F1A\u8BDD\u72B6\u6001\u7ECF\u5E38\u4F1A\u5728 CONNECTING \u4E0E CONNECTIED \u4E4B\u95F4\u8FDB\u884C\u5207\u6362\u3002</p><p>\u275E</p></blockquote><p>\u6700\u540E\uFF0C\u5F53\u51FA\u73B0\u8D85\u65F6\u6216\u8005\u5BA2\u6237\u7AEF\u4E3B\u52A8\u9000\u51FA\u7A0B\u5E8F\u7B49\u60C5\u51B5\u65F6\uFF0C\u5BA2\u6237\u7AEF\u4F1A\u8BDD\u72B6\u6001\u5219\u4F1A\u53D8\u4E3A CLOSE \u72B6\u6001\u3002</p><p><strong>\u300C\u4F1A\u8BDD\u5F02\u5E38\u300D</strong></p><p>\u5728 ZooKeeper \u4E2D\uFF0C\u4F1A\u8BDD\u7684\u8D85\u65F6\u5F02\u5E38\u5305\u62EC\u5BA2\u6237\u7AEF readtimeout \u5F02\u5E38\u548C\u670D\u52A1\u5668\u7AEF sessionTimeout \u5F02\u5E38\u3002</p><ul><li>\u5728\u6211\u4EEC\u5E73\u65F6\u7684\u5F00\u53D1\u4E2D\uFF0C\u8981\u660E\u786E\u8FD9\u4E24\u4E2A\u5F02\u5E38\u7684\u4E0D\u540C\u4E4B\u5904\u5728\u4E8E\u4E00\u4E2A\u662F\u53D1\u751F\u5728\u5BA2\u6237\u7AEF\uFF0C\u800C\u53E6\u4E00\u4E2A\u662F\u53D1\u751F\u5728\u670D\u52A1\u7AEF\u3002</li></ul><p>\u800C\u5BF9\u4E8E\u90A3\u4E9B\u5BF9 ZooKeeper \u63A5\u89E6\u4E0D\u6DF1\u7684\u5F00\u53D1\u4EBA\u5458\u6765\u8BF4\uFF0C\u4ED6\u4EEC\u5E38\u5E38\u8E29\u5751\u7684\u5730\u65B9\u5728\u4E8E\uFF0C\u867D\u7136\u8BBE\u7F6E\u4E86\u8D85\u65F6\u95F4\uFF0C\u4F46\u662F\u5728\u5B9E\u9645\u670D\u52A1\u8FD0\u884C\u7684\u65F6\u5019 ZooKeeper \u5E76\u6CA1\u6709\u6309\u7167\u8BBE\u7F6E\u7684\u8D85\u65F6\u65F6\u95F4\u6765\u7BA1\u7406\u4F1A\u8BDD\u3002</p><ul><li>\u8FD9\u662F\u56E0\u4E3A ZooKeeper \u5B9E\u9645\u8D77\u4F5C\u7528\u7684\u8D85\u65F6\u65F6\u95F4\u662F\u901A\u8FC7\u5BA2\u6237\u7AEF\u548C\u670D\u52A1\u7AEF\u534F\u5546\u51B3\u5B9A\u3002</li></ul><p>ZooKeeper \u5BA2\u6237\u7AEF\u5728\u548C\u670D\u52A1\u7AEF\u5EFA\u7ACB\u8FDE\u63A5\u7684\u65F6\u5019\uFF0C\u4F1A\u63D0\u4EA4\u4E00\u4E2A\u5BA2\u6237\u7AEF\u8BBE\u7F6E\u7684\u4F1A\u8BDD\u8D85\u65F6\u65F6\u95F4\uFF0C\u800C\u8BE5\u8D85\u65F6\u65F6\u95F4\u4F1A\u548C\u670D\u52A1\u7AEF\u8BBE\u7F6E\u7684\u6700\u5927\u8D85\u65F6\u65F6\u95F4\u548C\u6700\u5C0F\u8D85\u65F6\u65F6\u95F4\u8FDB\u884C\u6BD4\u5BF9\uFF0C\u5982\u679C\u6B63\u597D\u5728\u5176\u5141\u8BB8\u7684\u8303\u56F4\u5185\uFF0C\u5219\u91C7\u7528\u5BA2\u6237\u7AEF\u7684\u8D85\u65F6\u65F6\u95F4\u7BA1\u7406\u4F1A\u8BDD\u3002</p><p>\u5982\u679C\u5927\u4E8E\u6216\u8005\u5C0F\u4E8E\u670D\u52A1\u7AEF\u8BBE\u7F6E\u7684\u8D85\u65F6\u65F6\u95F4\uFF0C\u5219\u91C7\u7528\u670D\u52A1\u7AEF\u8BBE\u7F6E\u7684\u503C\u7BA1\u7406\u4F1A\u8BDD\u3002</p><p><strong>\u300C\u5206\u6876\u7B56\u7565\u300D</strong></p><p>\u6211\u4EEC\u77E5\u9053\u5728 ZooKeeper \u4E2D\u4E3A\u4E86\u4FDD\u8BC1\u4E00\u4E2A\u4F1A\u8BDD\u7684\u5B58\u6D3B\u72B6\u6001\uFF0C\u5BA2\u6237\u7AEF\u9700\u8981\u5411\u670D\u52A1\u5668\u5468\u671F\u6027\u5730\u53D1\u9001\u5FC3\u8DF3\u4FE1\u606F\u3002</p><ul><li>\u800C\u5BA2\u6237\u7AEF\u6240\u53D1\u9001\u7684\u5FC3\u8DF3\u4FE1\u606F\u53EF\u4EE5\u662F\u4E00\u4E2A ping \u8BF7\u6C42\uFF0C\u4E5F\u53EF\u4EE5\u662F\u4E00\u4E2A\u666E\u901A\u7684\u4E1A\u52A1\u8BF7\u6C42\u3002</li></ul><p>ZooKeeper \u670D\u52A1\u7AEF\u63A5\u6536\u8BF7\u6C42\u540E\uFF0C\u4F1A\u66F4\u65B0\u4F1A\u8BDD\u7684\u8FC7\u671F\u65F6\u95F4\uFF0C\u6765\u4FDD\u8BC1\u4F1A\u8BDD\u7684\u5B58\u6D3B\u72B6\u6001\u3002</p><ul><li>\u6240\u4EE5\u5728 ZooKeeper \u7684\u4F1A\u8BDD\u7BA1\u7406\u4E2D\uFF0C\u6700\u4E3B\u8981\u7684\u5DE5\u4F5C\u5C31\u662F\u7BA1\u7406\u4F1A\u8BDD\u7684\u8FC7\u671F\u65F6\u95F4\u3002</li></ul><blockquote><p>\u275D</p><p>ZooKeeper 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 create /digest_node1
diff --git a/dist/assets/jielehenduosihuodiganchu.html.fa573110.js b/dist/assets/jielehenduosihuodiganchu.html.576b64a2.js
similarity index 99%
rename from dist/assets/jielehenduosihuodiganchu.html.fa573110.js
rename to dist/assets/jielehenduosihuodiganchu.html.576b64a2.js
index 8e68f672..5e8aeacc 100644
--- a/dist/assets/jielehenduosihuodiganchu.html.fa573110.js
+++ b/dist/assets/jielehenduosihuodiganchu.html.576b64a2.js
@@ -1 +1 @@
-import{_ as e}from"./plugin-vue_export-helper.21dcd24c.js";import{o as i,c as a,e as u}from"./app.a0271b9c.js";const l={},h=u('<hr><h2 id="theme-awesome-green" tabindex="-1"><a class="header-anchor" href="#theme-awesome-green" aria-hidden="true">#</a> theme: awesome-green</h2><h2 id="\u63A5\u79C1\u6D3B" tabindex="-1"><a class="header-anchor" href="#\u63A5\u79C1\u6D3B" aria-hidden="true">#</a> \u63A5\u79C1\u6D3B</h2><ul><li>\u4ECA\u5E74\u641E\u4E86\u4E00\u4E2A\u56E2\u961F\u63A5\u79C1\u6D3B\uFF0C\u73B0\u5728\u670920\u591A\u4EBA\uFF0C\u6211\u8FD9\u8FB9\u4E3B\u8981\u8D1F\u8D23\u5546\u52A1\u6D3D\u8C08\uFF0C\u5408\u540C\u7B7E\u7F72\uFF0C\u8FDB\u5EA6\uFF0C\u98CE\u9669\u628A\u63A7\uFF0C\u7ED3\u679C\u4EA4\u4ED8\u4E4B\u7C7B\u7684\u6D3B\uFF0C\u4E0D\u6D89\u53CA\u5230\u5177\u4F53\u4EE3\u7801\u7684\u7F16\u5199\uFF0C\u4EA4\u4ED8\u4E86\u597D\u51E0\u4E2A\u9879\u76EE\uFF0C\u4ECA\u5929\u6765\u8C08\u4E00\u8C08\u79C1\u6D3B\u7684\u4E00\u4E9B\u7ECF\u5386</li></ul><h2 id="\u79C1\u6D3B\u7684\u79CD\u7C7B" tabindex="-1"><a class="header-anchor" href="#\u79C1\u6D3B\u7684\u79CD\u7C7B" aria-hidden="true">#</a> \u79C1\u6D3B\u7684\u79CD\u7C7B</h2><ul><li>\u603B\u7C7B\u5C31\u592A\u591A\u4E86\uFF0C\u540E\u53F0\u7BA1\u7406\uFF0C\u8DE8\u5883\u7535\u5546\uFF0C\u80A1\u7968\u4EA4\u6613\uFF0C\u5C0F\u7A0B\u5E8F\uFF0CAPP\uFF0C\u7B49\u7B49</li><li>\u6709\u603B\u5305\u6216\u8005\u5355\u5305\u4E00\u8BF4\uFF0C\u603B\u5305\u5C31\u662F\u524D\u540E\u7AEF\uFF0C\u670D\u52A1\u5668\u90FD\u5305\uFF0C\u7B97\u603B\u4EF7\uFF1B\u5355\u5305\u5C31\u662F\uFF0C\u4F60\u53EA\u505A\u524D\u7AEF\u6216\u8005\u540E\u7AEF\uFF0C\u5BF9\u4E8E\u4F60\u4E00\u4E2A\u4EBA\u7684\u8BDD\uFF0C\u57FA\u672C\u4E0A\u662F\u5355\u5305\u7684\u6BD4\u8F83\u591A\uFF0C\u603B\u5305\u7684\u8BDD\uFF0C\u5C0F\u9879\u76EE\u53EF\u4EE5\uFF0C\u5927\u9879\u76EE\u4F60\u4E00\u4E2A\u4EBA\u5C31\u5403\u4E0D\u4F4F\u4E86\uFF0C\u4EA4\u4ED8\u98CE\u9669\u5DE8\u5927</li></ul><h2 id="\u6E20\u9053" tabindex="-1"><a class="header-anchor" href="#\u6E20\u9053" aria-hidden="true">#</a> \u6E20\u9053</h2><ul><li>\u5404\u79CD\u4F17\u5305\u7684\u7F51\u7AD9\uFF0C\u4F46\u662F\u6211\u770B\u4E0A\u9762\u62A5\u4EF7\u592A\u4F4E\u4E86\uFF0C\u611F\u89C9\u5F88\u4E0D\u9760\u8C31\uFF0C\u6CA1\u6709\u63A5\u8FC7</li><li>\u4E3B\u8981\u662F\u670B\u53CB\uFF0C\u6E20\u9053\u4ECB\u7ECD</li><li>\u8FD8\u6709\u7684\u540C\u5B66\u63A5\u56FD\u5916\u7684\u5355\uFF0C\u4F46\u662F\u5403\u82F1\u8BED\uFF0C\u82F1\u8BED\u4E0D\u597D\u6CA1\u6CD5\u6C9F\u901A</li></ul><h2 id="\u5982\u4F55\u8C08\u4EF7\u683C" tabindex="-1"><a class="header-anchor" href="#\u5982\u4F55\u8C08\u4EF7\u683C" aria-hidden="true">#</a> \u5982\u4F55\u8C08\u4EF7\u683C</h2><ul><li><p>\u63A5\u8FC7\u79C1\u6D3B\u7684\u540C\u5B66\u90FD\u77E5\u9053\uFF0C\u4F60\u4EBA\u5728\u4E0A\u6D77\uFF0C\u548C\u4EBA\u5728\u897F\u5B89\u7684\u4EBA\u5929\u4EF7\u683C\u90FD\u662F\u4E0D\u4E00\u6837\u7684\uFF0C\u800C\u4E14\u6BCF\u4E2A\u4EBA\u7684\u5DE5\u8D44\u90FD\u662F\u4E0D\u4E00\u6837\u7684</p></li><li><p>\u9996\u5148\u4E00\u70B9\u8981\u6C42\u4F60\u7684\u7ECF\u9A8C\u4E30\u5BCC\u4E9B\uFF0C\u4F60\u7B2C\u4E00\u6B21\u4E0D\u4F1A\uFF0C\u4F60\u53EF\u4EE5\u627E\u4E00\u4E9B\u8D44\u6DF1\u7684\u6280\u672F\u5E2E\u4F60\u53BB\u505A\u4F30\u65F6\u95F4\uFF0C\u5927\u6982\u8981\u591A\u5C11\u4EBA\u5929\uFF0C\u8981\u6309\u7167\u4F60\u81EA\u5DF1\u7684\u6C34\u5E73\u505A\u4E00\u4E2A\u5408\u7406\u7684\u6392\u671F\uFF0C\u7136\u540E\u624D\u597D\u8C08\u4EF7\u683C</p></li><li><p>\u6BD4\u65B9\u4F60\u73B0\u5728\u5DE5\u8D4430000\u4E00\u4E2A\u6708\u7136\u540E30000\\u002F21.75 = 1379 \uFF0C\u4E00\u822C\u63A5\u79C1\u6D3B\u7684\u4EF7\u683C\u662F\u4F60\u7684\u65E5\u85AA\u6C34\u76841.5 \u500D\uFF0C\u5982\u679C\u4F4E\u4E8E2000\u4EBA\u5929\u4F60\u662F\u4E0D\u5212\u7B97\u7684\uFF0C\u8FD8\u4E0D\u5982\u53BB\u516C\u53F8\u52A0\u73ED\uFF0C\u56E0\u4E3A\u4F60\u505A\u79C1\u6D3B\u662F\u9762\u5411\u7ED3\u679C\u4EA4\u4ED8\u7684\uFF0C\u6CA1\u529E\u6CD5\u6478\u9C7C\uFF01\u6240\u4EE5\u4F60\u8981\u600E\u4E48\u80FD\u591F\u8FBE\u5230\u4F60\u65E5\u85AA2K\u7684\u6536\u5165\uFF0C\u8FD9\u5C31\u5F88\u6709\u8BB2\u7A76\uFF01\u4F60\u62A5\u4EF72k\\u002F\u4EBA\u5929\uFF0C\u4E0D\u7528\u60F3\u4F60\u80AF\u5B9A\u4F1A\u88ABpass\u7684\uFF01</p></li><li><p>\u4E00\u822C\u7684\u4EF7\u683C500-1000\\u002F\u4EBA\u5929\uFF0C\u592A\u9AD8\u4E86\u7532\u65B9\u4E00\u505A\u5BF9\u6BD4\u5C31\u4E0D\u4F1A\u8BA9\u4F60\u5E72\u4E86\uFF0C\u8D27\u6BD4\u4E09\u5BB6\u5417\uFF0C\u6240\u4EE5\u8FD9\u4E2A\u65F6\u5019\u5C31\u5F88\u6709\u8BB2\u7A76\u4E86\uFF0C\u4E5F\u5C31\u662F\u5957\u8DEF\u6765\u4E86\uFF0C\u5355\u4EF7\u4F4E\uFF0C\u4F60\u5C31\u628A\u65F6\u95F4\u5E72\u957F\uFF0C\u4F46\u662F\u4E5F\u4E0D\u80FD\u592A\u957F\uFF0C\u8FD9\u65F6\u5019\u5C31\u662F\u6C9F\u901A\u7684\u827A\u672F\u4E86\uFF0C\u5982\u4F55\u8FBE\u5230\u81EA\u5DF1\u7684\u76EE\u7684\uFF0C\u7136\u540E\u8BA9\u7532\u65B9\u6EE1\u610F\uFF0C\u4F60\u81EA\u5DF1\u4E5F\u6EE1\u610F\uFF0C\u5982\u679C\u90FD\u4E0D\u6EE1\u610F\u8FD9\u4E2A\u6D3B\u4E5F\u5C31\u6CA1\u6709\u7EE7\u7EED\u5E72\u4E0B\u53BB\u7684\u5FC5\u8981\u4E86\uFF0C</p></li></ul><h2 id="\u6536\u5165" tabindex="-1"><a class="header-anchor" href="#\u6536\u5165" aria-hidden="true">#</a> \u6536\u5165</h2><ul><li>\u6536\u5165\u591A\u5C11\u770B\u9879\u76EE\uFF0C\u6709\u7684\u5C0F\u9879\u76EE\u51E0K\uFF0C\u6709\u7684\u51E0\u4E07\uFF0C\u51E0\u5341\u4E07\uFF0C\u8FD8\u6709\u7684\u540C\u5B66\u80FD\u591F\u63A5\u4F4F\u51E0\u767E\u4E07\u7684\u9879\u76EE\uFF0C\u5927\u5BB6\u4E0D\u7528\u89C9\u5F97\u5403\u60CA\uFF0C\u5355\u4EF710\u4E07+\u7684\u9879\u76EE\u975E\u5E38\u591A\uFF0C\u4F46\u662F\u8D44\u6E90\u53EA\u638C\u63E1\u5728\u5C11\u90E8\u5206\u4EBA\u7684\u624B\u91CC\uFF0C\u4F60\u5E72\u4E00\u4E2A\u5927\u9879\u76EE\u5C31\u591F\u4F60\u5403\u597D\u591A\u5E74\u4E86\uFF0C\u4E0A\u4E2A\u6708\u4E00\u4E2A\u670B\u53CB\u8BF4\u4ED6\u4EEC\u56E2\u961F\u63A5\u4E86\u4E00\u4E2A\u603B\u5305\u8FD1500W\u7684\u5927\u9879\u76EE\uFF0C\u8BF4\u5B9E\u8BDD\u9178\u7684\u5F88\uFF0C\u4E3A\u4F55\u4E0D\u662F\u6211\u63A5\u7684\uFF0C\u63A5\u5230\u624B\u7ACB\u9A6C\u8F9E\u804C\uFF0C\u54C8\u54C8\uFF01\u900F\u9732\u4E00\u70B9\uFF0C\u5728\u67D0\u4E9B\u9886\u57DF\uFF0C\u975E\u5E38\u5403\u5173\u7CFB\uFF0C\u6709\u8D44\u6E90\u7684\u540C\u5B66\uFF0C\u52A8\u52A8\u5634\u94B1\u5C31\u5230\u624B\u4E86\uFF0C\u4F60\u770B\u4ED6\u5565\u4E5F\u6CA1\u5E72\uFF0C6\u4F4D\u6570\u6216\u8005\u66F4\u9AD8\u7684\u6536\u76CA\u5C31\u5230\u624B\u4E86\uFF0C\u5927\u5BB6\u4E0D\u8981\u55B7\u6211\uFF0C\u6211\u662F\u7ECF\u5386\u8FC7\uFF0C\u61C2\u7684\u90FD\u61C2\uFF1B</li><li>\u5BF9\u4E8E\u6211\u4E2A\u4EBA\uFF0C\u6211\u4E0D\u5199\u4EE3\u7801\uFF0C\u6211\u8D1F\u8D23\u7BA1\u7406\uFF0C\u98CE\u9669\u628A\u63A7\uFF0C\u6211\u62FF10%-25%\uFF0C\u770B\u9879\u76EE\u7684\u5927\u5C0F\uFF01\u76EE\u524D\u63A5\u8FC7\u6700\u5927\u7684\u9879\u76EE\u8FC76\u4F4D\u6570\uFF0C\u6240\u4EE5\u6211\u5728\u8FD9\u5757\u6536\u5165\u4E5F\u662F\u4E0D\u7A33\u5B9A\u7684\uFF0C\u968F\u7F18\uFF0C\u8FD9\u4E2A\u6708\u6CA1\u63A5\u5230\u9879\u76EE\u4E00\u5206\u6CA1\u6709\uFF0C\u591A\u4E86\u5C31\u4E0D\u597D\u8BF4\u4E86\uFF01\u770B\u8FD0\u6C14\uFF01\u4E00\u822C\u4F4E\u4E8E\u4E00\u4E07\u7684\u9879\u76EE\u6211\u662F\u4E0D\u63A5\u7684\uFF0C\u76F4\u63A5\u8F6C\u624B\u7ED9\u88AB\u4EBA\u505A\uFF0C\u6CA1\u7684\u8D5A\u5934\uFF01</li></ul><h2 id="\u98CE\u9669" tabindex="-1"><a class="header-anchor" href="#\u98CE\u9669" aria-hidden="true">#</a> \u98CE\u9669</h2><ul><li>\u4EA4\u4ED8\u98CE\u9669\uFF1A\u8FD9\u4E2A\u94B1\u4F60\u80FD\u4E0D\u80FD\u6323\uFF0C\u80FD\u4E0D\u80FD\u6309\u671F\uFF0C\u6309\u8D28\u91CF\u7684\u4EA4\u4ED8\uFF0C\u522B\u94B1\u6CA1\u8D5A\u5230\uFF0C\u9879\u76EE\u70C2\u5C3E\uFF0C\u8FD8\u641E\u4E00\u809A\u5B50\u6C14</li><li>\u4E00\u624B\u4EA4\u94B1\uFF0C\u4E00\u624B\u4EA4\u4EE3\u7801\uFF0C\u8FD9\u662F\u89C4\u77E9\uFF0C\u6709\u7684\u540C\u5B66\u4E0D\u61C2\uFF0C\u628A\u4EE3\u7801\u7ED9\u7532\u65B9\uFF0C\u5C3E\u6B3E\u5C31\u51C9\u4E86\uFF0C\u627E\u8C01\u8BF4\u7406\u53BB\uFF01</li><li>\u6BD4\u65B9\u9879\u76EE\u6392\u671F\u4E3A5\u4E2A\u8FED\u4EE3\uFF0C\u52A0\u4E0A\u5B9A\u91D1\u548C\u5C3E\u6B3E\u5E94\u8BE5\u5C31\u662F7\u4E2A\u8FED\u4EE3\uFF0C\u6309\u7167\u8FED\u4EE3\u7ED9\u94B1\uFF0C\u90A3\u94B1\u7684\u4EA4\u4ED8\u5C31\u662F\u5B9A\u91D1\uFF1A20%-30%\uFF0C\u5C3E\u6B3E\uFF1A\u8FD9\u4E2A\u63A7\u5236\u7684\u4F4E\u4E00\u70B9\uFF0C\u56E0\u4E3A\u5F88\u591A\u4E0D\u9760\u8C31\u7684\u7532\u65B9\u4F1A\u538B\u4F60\u7684\u5C3E\u6B3E\uFF0C\u5927\u698210%\uFF0C\u5176\u4ED6\u7684\u5C31\u662F\u8FED\u4EE3\u5185\u5E73\u5747\u5206\uFF0C\u6BCF\u4E2A\u8FED\u4EE3\u4EA4\u4ED8\u7ED3\u675F\u4E4B\u540E\u4ED8\u94B1</li><li>\u4E0D\u8981\u4E00\u8D77\u4EA4\u4ED8\u518D\u7ED9\u94B1\uFF0C\u5C0F\u9879\u76EE\u53EF\u4EE5\uFF0C\u5927\u9879\u76EE\u4E00\u5B9A\u8981\u5206\u671F\u7ED3\u7B97\uFF0C\u4E0D\u7136\u9047\u5230\u4E0D\u9760\u8C31\u7684\u4EBA\uFF0C\u4E0D\u7ED9\u4F60\u94B1\uFF0C\u4F60\u4E5F\u5F88\u65E0\u5948\uFF01</li><li>\u6709\u7684\u65F6\u5019\u522B\u4EBA\u4F1A\u8BA9\u4F60\u7ED9\u53D1\u7968\u4E4B\u7C7B\u7684\uFF0C\u4F60\u8981\u662F\u4E2A\u4EBA\u7684\uFF0C\u82B1\u70B9\u94B1\u627E\u522B\u4EBA\u641E\uFF0C\u7A0E\u70B9\u8981\u4E0D\u4E86\u591A\u5C11\u94B1\uFF01</li><li>\u505A\u4E8B\u60C5\u505A\u91CD\u8981\u7684\u662F\u8BDA\u4FE1\uFF0C\u5BF9\u4E8E\u4E00\u4E9B\u4E0D\u9760\u8C31\u7684\u7532\u65B9\uFF0C\u76F4\u63A5pass\u6389\uFF0C\u957F\u75DB\u4E0D\u5982\u77ED\u75DB\uFF0C\u63A5\u4E86\u4E4B\u540E\u94B1\u6323\u4E0D\u4E86\u591A\u5C11\uFF0C\u641E\u7684\u4E00\u809A\u5B50\u706B\uFF01</li><li>\u53CD\u6B63\u8FD9\u4E2A\u94B1\u4E0D\u597D\u6323\uFF0C\u4F1A\u641E\u7684\u4F60\u975E\u5E38\u5FD9\uFF0C\u4F60\u8981\u662F\u5199\u4E1A\u52A1\uFF0C\u6709\u4E9B\u65F6\u5019\u9047\u5230\u4E0D\u9760\u8C31\u7684\u4F1A\u8BA9\u4F60\u5F88\u96BE\u53D7</li><li>\u4E0D\u8981\u5F71\u54CD\u5230\u4F60\u7684\u672C\u804C\u5DE5\u4F5C\uFF01\uFF01\uFF01\u8FD9\u4E2A\u5F88\u91CD\u8981\uFF0C\u53CD\u6B63\u6211\u5728\u5DE5\u4F5C\u65F6\u95F4\u5185\u4E0D\u4F1A\u53BB\u82B1\u65F6\u95F4\u641E\u8FD9\u4E9B\u73A9\u610F\uFF0C\u4E3B\u4E1A\u8FD8\u662F\u8981\u505A\u597D\uFF0C\u79C1\u6D3B\u662F\u4E0D\u7A33\u5B9A\u7684\uFF01</li></ul><h2 id="\u65F6\u95F4-\u91D1\u94B1-vs-\u65F6\u95F4-u003e-u003e-u003e\u91D1\u94B1" tabindex="-1"><a class="header-anchor" href="#\u65F6\u95F4-\u91D1\u94B1-vs-\u65F6\u95F4-u003e-u003e-u003e\u91D1\u94B1" aria-hidden="true">#</a> \u65F6\u95F4 === \u91D1\u94B1 vs \u65F6\u95F4\\u003E\\u003E\\u003E\u91D1\u94B1</h2><ul><li><p>\u601D\u8003\u4E0B\uFF0C\u4F60\u662F\u628A\u4F60\u7684\u65F6\u95F4\u82B1\u5728\u63A5\u79C1\u6D3B\u4E0A\u9762\uFF0C\u8FD8\u662F\u82B1\u5728\u63D0\u5347\u4E2A\u4EBA\u80FD\u529B\u4E0A\u9762</p></li><li><p>\u636E\u6211\u4E86\u89E3\uFF0C\u5BF9\u5927\u90E8\u5206\u4EBA\u6765\u8BF4\u505A\u79C1\u6D3B\u4E00\u4E2A\u6708\u80FD\u505A\u52301w\u4EE5\u4E0A\u7684\u4EBA\u57FA\u672C\u5BE5\u5BE5\u65E0\u51E0\uFF0C\u4F60\u5982\u679C\u624B\u63E1\u8D44\u6E90\uFF0C\u90A3\u968F\u610F\u641E\u94B1</p></li><li><p>\u6211\u867D\u7136\u5E26\u4E86\u5F88\u591A\u4EBA\u63A5\u79C1\u6D3B\u505A\uFF0C\u6211\u53EA\u662F\u6574\u5408\u8D44\u6E90\uFF0C\u8D5A\u4E2A\u63D0\u6210\uFF1B\u4F46\u662F\u6211\u8FD8\u662F\u4E0D\u5EFA\u8BAE\u5927\u5BB6\u628A\u5B9D\u62BC\u5728\u63A5\u79C1\u6D3B\u4E0A\u9762\uFF0C\u56E0\u4E3A\u6211\u89C9\u5F97\u8FD9\u4E2A\u672C\u6765\u5C31\u662F\u4E0D\u7A33\u5B9A\u7684\uFF0C\u4E00\u5B9A\u8981\u628A\u7EDD\u5927\u90E8\u5206\u7684\u65F6\u95F4\u538B\u5728\u63D0\u5347\u4E2A\u4EBA\u80FD\u529B\u4E0A\u9762\uFF0C\u6709\u4EBA\u4F1A\u8BF4\u63A5\u79C1\u6D3B\u5199\u9879\u76EE\uFF0C\u4E0D\u662F\u4E5F\u5728\u63D0\u5347\u81EA\u5DF1\u7684\u4E2A\u4EBA\u80FD\u529B\u5417\uFF01\u6211\u89C9\u5F97\u4E0D\u662F\u7684\uFF0C\u4F60\u63A5\u79C1\u6D3B\u505A\u5F88\u591A\u9879\u76EE\uFF0C\u53EA\u80FD\u8BF4\u4F60\u5199\u4EE3\u7801\u6BD4\u8F83\u719F\u7EC3\uFF0C\u4F60\u662F\u9762\u5411\u7ED3\u679C\u5FEB\u901F\u4EA4\u4ED8\u7684\uFF0C\u53EA\u8981\u7532\u65B9\u89C9\u5F97\u6CA1\u95EE\u9898\uFF0C\u4F60\u4E0D\u4F1A\u53BB\u8003\u8651\u9879\u76EE\u6027\u80FD\uFF0C\u4F18\u5316\u4E4B\u7C7B\u7684\uFF0C\u89D2\u5EA6\u7AD9\u9AD8\u4E00\u70B9\uFF0C\u4F60\u505A\u7684\u4E8B\u60C5\u592A\u6742\uFF0C\u5BF9\u4E8E\u4F60\u4E2A\u4EBA\u6210\u957F\u7684\u4EF7\u503C\u4E0D\u662F\u5F88\u5927\uFF01\u51E1\u4E8B\u90FD\u6709\u4F46\u662F\uFF0C\u54C8\u54C8\uFF0C\u4E07\u4E00\u4F60\u6709\u673A\u4F1A\u63A5\u5230500w\u7684\u9879\u76EE\u5462\uFF01\u8FD9\u65F6\u5019\u4E0D\u8981\u60F3\u4E86\uFF0C\u8D76\u7D27\u63A5\u4E0B\u6765\uFF0C\u54C8\u54C8\uFF01</p></li><li><p>\u5927\u5BB6\u52A0\u6CB9\uFF01\u5E72\u5565\u90FD\u884C\uFF0C\u5FC3\u91CC\u89C9\u5F97\u5E73\u8861\u5C31\u53EF\u4EE5\uFF0C\u4E3B\u8981\u8FD8\u662F\u770B\u4F60\u81EA\u5DF1\u7684\u6289\u62E9\uFF01\u4F46\u662F\u4E00\u5B9A\u8981\u628A\u4E3B\u4E1A\u5DE5\u4F5C\u5E72\u597D\uFF0C\u5E72\u6F02\u4EAE\uFF01</p></li></ul><h2 id="\u4F20\u9001\u95E8" tabindex="-1"><a class="header-anchor" href="#\u4F20\u9001\u95E8" aria-hidden="true">#</a> \u4F20\u9001\u95E8</h2><ul><li><a href="https:%5Cu002F%5Cu002Fjuejin.cn%5Cu002Fpost%5Cu002F7086381206236823559">\u94DC\u4E09\u94C1\u56DB\u4E0B\uFF0C\u62FF\u5230\u524D\u7AEF\u6280\u672F\u4E13\u5BB6\u7684offer</a></li><li><a href="https:%5Cu002F%5Cu002Fjuejin.cn%5Cu002Fpost%5Cu002F7036689189567463432">\u5377\u738B\u76842021\u603B\u7ED3</a></li><li><a href="https:%5Cu002F%5Cu002Fjuejin.cn%5Cu002Fuser%5Cu002F1943592288395479%5Cu002Fpins">\u516D\u70B9\u6253\u5361\u4EA4\u6D41\u7FA4</a></li><li><a href="https:%5Cu002F%5Cu002Fjuejin.cn%5Cu002Fpost%5Cu002F7007243669921071117">\u6211\u4E3A\u4EC0\u4E48\u559C\u6B22\u624B\u6284\u4EE3\u7801</a></li><li><a href="https:%5Cu002F%5Cu002Fjuejin.cn%5Cu002Fpost%5Cu002F7016189093851693069">\u524D\u7AEF\u4E09\u5E74\uFF1A\u5C0F\u767D\u53D8\u6210\u8001\u6CB9\u6761</a></li><li><a href="https:%5Cu002F%5Cu002Fjuejin.cn%5Cu002Fpost%5Cu002F7008027646898487326">\u4ECA\u5E74\u9762\u8BD5\u4E86100+\u7684\u524D\u7AEF\u540C\u5B66\u6211\u7684\u603B\u7ED3</a></li><li><a href="https:%5Cu002F%5Cu002Fjuejin.cn%5Cu002Fpost%5Cu002F7000659708948250660#comment">\u6211\u4E3A\u4EC0\u4E48\u575A\u6301\u516D\u70B9\u8D77\u5E8A</a></li><li><a href="https:%5Cu002F%5Cu002Fjuejin.cn%5Cu002Fpost%5Cu002F7004611718009585678">\u6211\u8BFB\u6280\u672F\u4E66\u5F88\u7126\u8651\uFF0C\u8BFB\u4E0D\u4E0B\u53BB\u4E66\u600E\u4E48\u529E\uFF1F</a></li><li><a href="https:%5Cu002F%5Cu002Fjuejin.cn%5Cu002Fpost%5Cu002F7002030597581307941">\u52E4\u594B\u52AA\u529B === &quot;\u5377&quot; \uFF1F</a></li><li><a href="https:%5Cu002F%5Cu002Fjuejin.cn%5Cu002Fpost%5Cu002F6991728251034959885">vite + react + ts \u624B\u6478\u624B\u505A\u9879\u76EE\u7CFB\u5217\u4E00 \uFF08\u9879\u76EE\u914D\u7F6E\u7BC7\uFF09</a></li><li><a href="https:%5Cu002F%5Cu002Fjuejin.cn%5Cu002Fpost%5Cu002F6997560918418653198">vite + react + ts \u624B\u6478\u624B\u505A\u9879\u76EE\u7CFB\u5217\u4E8C \uFF08\u5B9E\u6218\u7BC7\uFF09</a></li></ul>',18),t=[h];function r(n,s){return i(),a("div",null,t)}var F=e(l,[["render",r],["__file","jielehenduosihuodiganchu.html.vue"]]);export{F as default};
+import{_ as e}from"./plugin-vue_export-helper.21dcd24c.js";import{o as i,c as a,e as u}from"./app.615e41d8.js";const l={},h=u('<hr><h2 id="theme-awesome-green" tabindex="-1"><a class="header-anchor" href="#theme-awesome-green" aria-hidden="true">#</a> theme: awesome-green</h2><h2 id="\u63A5\u79C1\u6D3B" tabindex="-1"><a class="header-anchor" href="#\u63A5\u79C1\u6D3B" aria-hidden="true">#</a> \u63A5\u79C1\u6D3B</h2><ul><li>\u4ECA\u5E74\u641E\u4E86\u4E00\u4E2A\u56E2\u961F\u63A5\u79C1\u6D3B\uFF0C\u73B0\u5728\u670920\u591A\u4EBA\uFF0C\u6211\u8FD9\u8FB9\u4E3B\u8981\u8D1F\u8D23\u5546\u52A1\u6D3D\u8C08\uFF0C\u5408\u540C\u7B7E\u7F72\uFF0C\u8FDB\u5EA6\uFF0C\u98CE\u9669\u628A\u63A7\uFF0C\u7ED3\u679C\u4EA4\u4ED8\u4E4B\u7C7B\u7684\u6D3B\uFF0C\u4E0D\u6D89\u53CA\u5230\u5177\u4F53\u4EE3\u7801\u7684\u7F16\u5199\uFF0C\u4EA4\u4ED8\u4E86\u597D\u51E0\u4E2A\u9879\u76EE\uFF0C\u4ECA\u5929\u6765\u8C08\u4E00\u8C08\u79C1\u6D3B\u7684\u4E00\u4E9B\u7ECF\u5386</li></ul><h2 id="\u79C1\u6D3B\u7684\u79CD\u7C7B" tabindex="-1"><a class="header-anchor" href="#\u79C1\u6D3B\u7684\u79CD\u7C7B" aria-hidden="true">#</a> \u79C1\u6D3B\u7684\u79CD\u7C7B</h2><ul><li>\u603B\u7C7B\u5C31\u592A\u591A\u4E86\uFF0C\u540E\u53F0\u7BA1\u7406\uFF0C\u8DE8\u5883\u7535\u5546\uFF0C\u80A1\u7968\u4EA4\u6613\uFF0C\u5C0F\u7A0B\u5E8F\uFF0CAPP\uFF0C\u7B49\u7B49</li><li>\u6709\u603B\u5305\u6216\u8005\u5355\u5305\u4E00\u8BF4\uFF0C\u603B\u5305\u5C31\u662F\u524D\u540E\u7AEF\uFF0C\u670D\u52A1\u5668\u90FD\u5305\uFF0C\u7B97\u603B\u4EF7\uFF1B\u5355\u5305\u5C31\u662F\uFF0C\u4F60\u53EA\u505A\u524D\u7AEF\u6216\u8005\u540E\u7AEF\uFF0C\u5BF9\u4E8E\u4F60\u4E00\u4E2A\u4EBA\u7684\u8BDD\uFF0C\u57FA\u672C\u4E0A\u662F\u5355\u5305\u7684\u6BD4\u8F83\u591A\uFF0C\u603B\u5305\u7684\u8BDD\uFF0C\u5C0F\u9879\u76EE\u53EF\u4EE5\uFF0C\u5927\u9879\u76EE\u4F60\u4E00\u4E2A\u4EBA\u5C31\u5403\u4E0D\u4F4F\u4E86\uFF0C\u4EA4\u4ED8\u98CE\u9669\u5DE8\u5927</li></ul><h2 id="\u6E20\u9053" tabindex="-1"><a class="header-anchor" href="#\u6E20\u9053" aria-hidden="true">#</a> \u6E20\u9053</h2><ul><li>\u5404\u79CD\u4F17\u5305\u7684\u7F51\u7AD9\uFF0C\u4F46\u662F\u6211\u770B\u4E0A\u9762\u62A5\u4EF7\u592A\u4F4E\u4E86\uFF0C\u611F\u89C9\u5F88\u4E0D\u9760\u8C31\uFF0C\u6CA1\u6709\u63A5\u8FC7</li><li>\u4E3B\u8981\u662F\u670B\u53CB\uFF0C\u6E20\u9053\u4ECB\u7ECD</li><li>\u8FD8\u6709\u7684\u540C\u5B66\u63A5\u56FD\u5916\u7684\u5355\uFF0C\u4F46\u662F\u5403\u82F1\u8BED\uFF0C\u82F1\u8BED\u4E0D\u597D\u6CA1\u6CD5\u6C9F\u901A</li></ul><h2 id="\u5982\u4F55\u8C08\u4EF7\u683C" tabindex="-1"><a class="header-anchor" href="#\u5982\u4F55\u8C08\u4EF7\u683C" aria-hidden="true">#</a> \u5982\u4F55\u8C08\u4EF7\u683C</h2><ul><li><p>\u63A5\u8FC7\u79C1\u6D3B\u7684\u540C\u5B66\u90FD\u77E5\u9053\uFF0C\u4F60\u4EBA\u5728\u4E0A\u6D77\uFF0C\u548C\u4EBA\u5728\u897F\u5B89\u7684\u4EBA\u5929\u4EF7\u683C\u90FD\u662F\u4E0D\u4E00\u6837\u7684\uFF0C\u800C\u4E14\u6BCF\u4E2A\u4EBA\u7684\u5DE5\u8D44\u90FD\u662F\u4E0D\u4E00\u6837\u7684</p></li><li><p>\u9996\u5148\u4E00\u70B9\u8981\u6C42\u4F60\u7684\u7ECF\u9A8C\u4E30\u5BCC\u4E9B\uFF0C\u4F60\u7B2C\u4E00\u6B21\u4E0D\u4F1A\uFF0C\u4F60\u53EF\u4EE5\u627E\u4E00\u4E9B\u8D44\u6DF1\u7684\u6280\u672F\u5E2E\u4F60\u53BB\u505A\u4F30\u65F6\u95F4\uFF0C\u5927\u6982\u8981\u591A\u5C11\u4EBA\u5929\uFF0C\u8981\u6309\u7167\u4F60\u81EA\u5DF1\u7684\u6C34\u5E73\u505A\u4E00\u4E2A\u5408\u7406\u7684\u6392\u671F\uFF0C\u7136\u540E\u624D\u597D\u8C08\u4EF7\u683C</p></li><li><p>\u6BD4\u65B9\u4F60\u73B0\u5728\u5DE5\u8D4430000\u4E00\u4E2A\u6708\u7136\u540E30000\\u002F21.75 = 1379 \uFF0C\u4E00\u822C\u63A5\u79C1\u6D3B\u7684\u4EF7\u683C\u662F\u4F60\u7684\u65E5\u85AA\u6C34\u76841.5 \u500D\uFF0C\u5982\u679C\u4F4E\u4E8E2000\u4EBA\u5929\u4F60\u662F\u4E0D\u5212\u7B97\u7684\uFF0C\u8FD8\u4E0D\u5982\u53BB\u516C\u53F8\u52A0\u73ED\uFF0C\u56E0\u4E3A\u4F60\u505A\u79C1\u6D3B\u662F\u9762\u5411\u7ED3\u679C\u4EA4\u4ED8\u7684\uFF0C\u6CA1\u529E\u6CD5\u6478\u9C7C\uFF01\u6240\u4EE5\u4F60\u8981\u600E\u4E48\u80FD\u591F\u8FBE\u5230\u4F60\u65E5\u85AA2K\u7684\u6536\u5165\uFF0C\u8FD9\u5C31\u5F88\u6709\u8BB2\u7A76\uFF01\u4F60\u62A5\u4EF72k\\u002F\u4EBA\u5929\uFF0C\u4E0D\u7528\u60F3\u4F60\u80AF\u5B9A\u4F1A\u88ABpass\u7684\uFF01</p></li><li><p>\u4E00\u822C\u7684\u4EF7\u683C500-1000\\u002F\u4EBA\u5929\uFF0C\u592A\u9AD8\u4E86\u7532\u65B9\u4E00\u505A\u5BF9\u6BD4\u5C31\u4E0D\u4F1A\u8BA9\u4F60\u5E72\u4E86\uFF0C\u8D27\u6BD4\u4E09\u5BB6\u5417\uFF0C\u6240\u4EE5\u8FD9\u4E2A\u65F6\u5019\u5C31\u5F88\u6709\u8BB2\u7A76\u4E86\uFF0C\u4E5F\u5C31\u662F\u5957\u8DEF\u6765\u4E86\uFF0C\u5355\u4EF7\u4F4E\uFF0C\u4F60\u5C31\u628A\u65F6\u95F4\u5E72\u957F\uFF0C\u4F46\u662F\u4E5F\u4E0D\u80FD\u592A\u957F\uFF0C\u8FD9\u65F6\u5019\u5C31\u662F\u6C9F\u901A\u7684\u827A\u672F\u4E86\uFF0C\u5982\u4F55\u8FBE\u5230\u81EA\u5DF1\u7684\u76EE\u7684\uFF0C\u7136\u540E\u8BA9\u7532\u65B9\u6EE1\u610F\uFF0C\u4F60\u81EA\u5DF1\u4E5F\u6EE1\u610F\uFF0C\u5982\u679C\u90FD\u4E0D\u6EE1\u610F\u8FD9\u4E2A\u6D3B\u4E5F\u5C31\u6CA1\u6709\u7EE7\u7EED\u5E72\u4E0B\u53BB\u7684\u5FC5\u8981\u4E86\uFF0C</p></li></ul><h2 id="\u6536\u5165" tabindex="-1"><a class="header-anchor" href="#\u6536\u5165" aria-hidden="true">#</a> \u6536\u5165</h2><ul><li>\u6536\u5165\u591A\u5C11\u770B\u9879\u76EE\uFF0C\u6709\u7684\u5C0F\u9879\u76EE\u51E0K\uFF0C\u6709\u7684\u51E0\u4E07\uFF0C\u51E0\u5341\u4E07\uFF0C\u8FD8\u6709\u7684\u540C\u5B66\u80FD\u591F\u63A5\u4F4F\u51E0\u767E\u4E07\u7684\u9879\u76EE\uFF0C\u5927\u5BB6\u4E0D\u7528\u89C9\u5F97\u5403\u60CA\uFF0C\u5355\u4EF710\u4E07+\u7684\u9879\u76EE\u975E\u5E38\u591A\uFF0C\u4F46\u662F\u8D44\u6E90\u53EA\u638C\u63E1\u5728\u5C11\u90E8\u5206\u4EBA\u7684\u624B\u91CC\uFF0C\u4F60\u5E72\u4E00\u4E2A\u5927\u9879\u76EE\u5C31\u591F\u4F60\u5403\u597D\u591A\u5E74\u4E86\uFF0C\u4E0A\u4E2A\u6708\u4E00\u4E2A\u670B\u53CB\u8BF4\u4ED6\u4EEC\u56E2\u961F\u63A5\u4E86\u4E00\u4E2A\u603B\u5305\u8FD1500W\u7684\u5927\u9879\u76EE\uFF0C\u8BF4\u5B9E\u8BDD\u9178\u7684\u5F88\uFF0C\u4E3A\u4F55\u4E0D\u662F\u6211\u63A5\u7684\uFF0C\u63A5\u5230\u624B\u7ACB\u9A6C\u8F9E\u804C\uFF0C\u54C8\u54C8\uFF01\u900F\u9732\u4E00\u70B9\uFF0C\u5728\u67D0\u4E9B\u9886\u57DF\uFF0C\u975E\u5E38\u5403\u5173\u7CFB\uFF0C\u6709\u8D44\u6E90\u7684\u540C\u5B66\uFF0C\u52A8\u52A8\u5634\u94B1\u5C31\u5230\u624B\u4E86\uFF0C\u4F60\u770B\u4ED6\u5565\u4E5F\u6CA1\u5E72\uFF0C6\u4F4D\u6570\u6216\u8005\u66F4\u9AD8\u7684\u6536\u76CA\u5C31\u5230\u624B\u4E86\uFF0C\u5927\u5BB6\u4E0D\u8981\u55B7\u6211\uFF0C\u6211\u662F\u7ECF\u5386\u8FC7\uFF0C\u61C2\u7684\u90FD\u61C2\uFF1B</li><li>\u5BF9\u4E8E\u6211\u4E2A\u4EBA\uFF0C\u6211\u4E0D\u5199\u4EE3\u7801\uFF0C\u6211\u8D1F\u8D23\u7BA1\u7406\uFF0C\u98CE\u9669\u628A\u63A7\uFF0C\u6211\u62FF10%-25%\uFF0C\u770B\u9879\u76EE\u7684\u5927\u5C0F\uFF01\u76EE\u524D\u63A5\u8FC7\u6700\u5927\u7684\u9879\u76EE\u8FC76\u4F4D\u6570\uFF0C\u6240\u4EE5\u6211\u5728\u8FD9\u5757\u6536\u5165\u4E5F\u662F\u4E0D\u7A33\u5B9A\u7684\uFF0C\u968F\u7F18\uFF0C\u8FD9\u4E2A\u6708\u6CA1\u63A5\u5230\u9879\u76EE\u4E00\u5206\u6CA1\u6709\uFF0C\u591A\u4E86\u5C31\u4E0D\u597D\u8BF4\u4E86\uFF01\u770B\u8FD0\u6C14\uFF01\u4E00\u822C\u4F4E\u4E8E\u4E00\u4E07\u7684\u9879\u76EE\u6211\u662F\u4E0D\u63A5\u7684\uFF0C\u76F4\u63A5\u8F6C\u624B\u7ED9\u88AB\u4EBA\u505A\uFF0C\u6CA1\u7684\u8D5A\u5934\uFF01</li></ul><h2 id="\u98CE\u9669" tabindex="-1"><a class="header-anchor" href="#\u98CE\u9669" aria-hidden="true">#</a> \u98CE\u9669</h2><ul><li>\u4EA4\u4ED8\u98CE\u9669\uFF1A\u8FD9\u4E2A\u94B1\u4F60\u80FD\u4E0D\u80FD\u6323\uFF0C\u80FD\u4E0D\u80FD\u6309\u671F\uFF0C\u6309\u8D28\u91CF\u7684\u4EA4\u4ED8\uFF0C\u522B\u94B1\u6CA1\u8D5A\u5230\uFF0C\u9879\u76EE\u70C2\u5C3E\uFF0C\u8FD8\u641E\u4E00\u809A\u5B50\u6C14</li><li>\u4E00\u624B\u4EA4\u94B1\uFF0C\u4E00\u624B\u4EA4\u4EE3\u7801\uFF0C\u8FD9\u662F\u89C4\u77E9\uFF0C\u6709\u7684\u540C\u5B66\u4E0D\u61C2\uFF0C\u628A\u4EE3\u7801\u7ED9\u7532\u65B9\uFF0C\u5C3E\u6B3E\u5C31\u51C9\u4E86\uFF0C\u627E\u8C01\u8BF4\u7406\u53BB\uFF01</li><li>\u6BD4\u65B9\u9879\u76EE\u6392\u671F\u4E3A5\u4E2A\u8FED\u4EE3\uFF0C\u52A0\u4E0A\u5B9A\u91D1\u548C\u5C3E\u6B3E\u5E94\u8BE5\u5C31\u662F7\u4E2A\u8FED\u4EE3\uFF0C\u6309\u7167\u8FED\u4EE3\u7ED9\u94B1\uFF0C\u90A3\u94B1\u7684\u4EA4\u4ED8\u5C31\u662F\u5B9A\u91D1\uFF1A20%-30%\uFF0C\u5C3E\u6B3E\uFF1A\u8FD9\u4E2A\u63A7\u5236\u7684\u4F4E\u4E00\u70B9\uFF0C\u56E0\u4E3A\u5F88\u591A\u4E0D\u9760\u8C31\u7684\u7532\u65B9\u4F1A\u538B\u4F60\u7684\u5C3E\u6B3E\uFF0C\u5927\u698210%\uFF0C\u5176\u4ED6\u7684\u5C31\u662F\u8FED\u4EE3\u5185\u5E73\u5747\u5206\uFF0C\u6BCF\u4E2A\u8FED\u4EE3\u4EA4\u4ED8\u7ED3\u675F\u4E4B\u540E\u4ED8\u94B1</li><li>\u4E0D\u8981\u4E00\u8D77\u4EA4\u4ED8\u518D\u7ED9\u94B1\uFF0C\u5C0F\u9879\u76EE\u53EF\u4EE5\uFF0C\u5927\u9879\u76EE\u4E00\u5B9A\u8981\u5206\u671F\u7ED3\u7B97\uFF0C\u4E0D\u7136\u9047\u5230\u4E0D\u9760\u8C31\u7684\u4EBA\uFF0C\u4E0D\u7ED9\u4F60\u94B1\uFF0C\u4F60\u4E5F\u5F88\u65E0\u5948\uFF01</li><li>\u6709\u7684\u65F6\u5019\u522B\u4EBA\u4F1A\u8BA9\u4F60\u7ED9\u53D1\u7968\u4E4B\u7C7B\u7684\uFF0C\u4F60\u8981\u662F\u4E2A\u4EBA\u7684\uFF0C\u82B1\u70B9\u94B1\u627E\u522B\u4EBA\u641E\uFF0C\u7A0E\u70B9\u8981\u4E0D\u4E86\u591A\u5C11\u94B1\uFF01</li><li>\u505A\u4E8B\u60C5\u505A\u91CD\u8981\u7684\u662F\u8BDA\u4FE1\uFF0C\u5BF9\u4E8E\u4E00\u4E9B\u4E0D\u9760\u8C31\u7684\u7532\u65B9\uFF0C\u76F4\u63A5pass\u6389\uFF0C\u957F\u75DB\u4E0D\u5982\u77ED\u75DB\uFF0C\u63A5\u4E86\u4E4B\u540E\u94B1\u6323\u4E0D\u4E86\u591A\u5C11\uFF0C\u641E\u7684\u4E00\u809A\u5B50\u706B\uFF01</li><li>\u53CD\u6B63\u8FD9\u4E2A\u94B1\u4E0D\u597D\u6323\uFF0C\u4F1A\u641E\u7684\u4F60\u975E\u5E38\u5FD9\uFF0C\u4F60\u8981\u662F\u5199\u4E1A\u52A1\uFF0C\u6709\u4E9B\u65F6\u5019\u9047\u5230\u4E0D\u9760\u8C31\u7684\u4F1A\u8BA9\u4F60\u5F88\u96BE\u53D7</li><li>\u4E0D\u8981\u5F71\u54CD\u5230\u4F60\u7684\u672C\u804C\u5DE5\u4F5C\uFF01\uFF01\uFF01\u8FD9\u4E2A\u5F88\u91CD\u8981\uFF0C\u53CD\u6B63\u6211\u5728\u5DE5\u4F5C\u65F6\u95F4\u5185\u4E0D\u4F1A\u53BB\u82B1\u65F6\u95F4\u641E\u8FD9\u4E9B\u73A9\u610F\uFF0C\u4E3B\u4E1A\u8FD8\u662F\u8981\u505A\u597D\uFF0C\u79C1\u6D3B\u662F\u4E0D\u7A33\u5B9A\u7684\uFF01</li></ul><h2 id="\u65F6\u95F4-\u91D1\u94B1-vs-\u65F6\u95F4-u003e-u003e-u003e\u91D1\u94B1" tabindex="-1"><a class="header-anchor" href="#\u65F6\u95F4-\u91D1\u94B1-vs-\u65F6\u95F4-u003e-u003e-u003e\u91D1\u94B1" aria-hidden="true">#</a> \u65F6\u95F4 === \u91D1\u94B1 vs \u65F6\u95F4\\u003E\\u003E\\u003E\u91D1\u94B1</h2><ul><li><p>\u601D\u8003\u4E0B\uFF0C\u4F60\u662F\u628A\u4F60\u7684\u65F6\u95F4\u82B1\u5728\u63A5\u79C1\u6D3B\u4E0A\u9762\uFF0C\u8FD8\u662F\u82B1\u5728\u63D0\u5347\u4E2A\u4EBA\u80FD\u529B\u4E0A\u9762</p></li><li><p>\u636E\u6211\u4E86\u89E3\uFF0C\u5BF9\u5927\u90E8\u5206\u4EBA\u6765\u8BF4\u505A\u79C1\u6D3B\u4E00\u4E2A\u6708\u80FD\u505A\u52301w\u4EE5\u4E0A\u7684\u4EBA\u57FA\u672C\u5BE5\u5BE5\u65E0\u51E0\uFF0C\u4F60\u5982\u679C\u624B\u63E1\u8D44\u6E90\uFF0C\u90A3\u968F\u610F\u641E\u94B1</p></li><li><p>\u6211\u867D\u7136\u5E26\u4E86\u5F88\u591A\u4EBA\u63A5\u79C1\u6D3B\u505A\uFF0C\u6211\u53EA\u662F\u6574\u5408\u8D44\u6E90\uFF0C\u8D5A\u4E2A\u63D0\u6210\uFF1B\u4F46\u662F\u6211\u8FD8\u662F\u4E0D\u5EFA\u8BAE\u5927\u5BB6\u628A\u5B9D\u62BC\u5728\u63A5\u79C1\u6D3B\u4E0A\u9762\uFF0C\u56E0\u4E3A\u6211\u89C9\u5F97\u8FD9\u4E2A\u672C\u6765\u5C31\u662F\u4E0D\u7A33\u5B9A\u7684\uFF0C\u4E00\u5B9A\u8981\u628A\u7EDD\u5927\u90E8\u5206\u7684\u65F6\u95F4\u538B\u5728\u63D0\u5347\u4E2A\u4EBA\u80FD\u529B\u4E0A\u9762\uFF0C\u6709\u4EBA\u4F1A\u8BF4\u63A5\u79C1\u6D3B\u5199\u9879\u76EE\uFF0C\u4E0D\u662F\u4E5F\u5728\u63D0\u5347\u81EA\u5DF1\u7684\u4E2A\u4EBA\u80FD\u529B\u5417\uFF01\u6211\u89C9\u5F97\u4E0D\u662F\u7684\uFF0C\u4F60\u63A5\u79C1\u6D3B\u505A\u5F88\u591A\u9879\u76EE\uFF0C\u53EA\u80FD\u8BF4\u4F60\u5199\u4EE3\u7801\u6BD4\u8F83\u719F\u7EC3\uFF0C\u4F60\u662F\u9762\u5411\u7ED3\u679C\u5FEB\u901F\u4EA4\u4ED8\u7684\uFF0C\u53EA\u8981\u7532\u65B9\u89C9\u5F97\u6CA1\u95EE\u9898\uFF0C\u4F60\u4E0D\u4F1A\u53BB\u8003\u8651\u9879\u76EE\u6027\u80FD\uFF0C\u4F18\u5316\u4E4B\u7C7B\u7684\uFF0C\u89D2\u5EA6\u7AD9\u9AD8\u4E00\u70B9\uFF0C\u4F60\u505A\u7684\u4E8B\u60C5\u592A\u6742\uFF0C\u5BF9\u4E8E\u4F60\u4E2A\u4EBA\u6210\u957F\u7684\u4EF7\u503C\u4E0D\u662F\u5F88\u5927\uFF01\u51E1\u4E8B\u90FD\u6709\u4F46\u662F\uFF0C\u54C8\u54C8\uFF0C\u4E07\u4E00\u4F60\u6709\u673A\u4F1A\u63A5\u5230500w\u7684\u9879\u76EE\u5462\uFF01\u8FD9\u65F6\u5019\u4E0D\u8981\u60F3\u4E86\uFF0C\u8D76\u7D27\u63A5\u4E0B\u6765\uFF0C\u54C8\u54C8\uFF01</p></li><li><p>\u5927\u5BB6\u52A0\u6CB9\uFF01\u5E72\u5565\u90FD\u884C\uFF0C\u5FC3\u91CC\u89C9\u5F97\u5E73\u8861\u5C31\u53EF\u4EE5\uFF0C\u4E3B\u8981\u8FD8\u662F\u770B\u4F60\u81EA\u5DF1\u7684\u6289\u62E9\uFF01\u4F46\u662F\u4E00\u5B9A\u8981\u628A\u4E3B\u4E1A\u5DE5\u4F5C\u5E72\u597D\uFF0C\u5E72\u6F02\u4EAE\uFF01</p></li></ul><h2 id="\u4F20\u9001\u95E8" tabindex="-1"><a class="header-anchor" href="#\u4F20\u9001\u95E8" aria-hidden="true">#</a> \u4F20\u9001\u95E8</h2><ul><li><a href="https:%5Cu002F%5Cu002Fjuejin.cn%5Cu002Fpost%5Cu002F7086381206236823559">\u94DC\u4E09\u94C1\u56DB\u4E0B\uFF0C\u62FF\u5230\u524D\u7AEF\u6280\u672F\u4E13\u5BB6\u7684offer</a></li><li><a href="https:%5Cu002F%5Cu002Fjuejin.cn%5Cu002Fpost%5Cu002F7036689189567463432">\u5377\u738B\u76842021\u603B\u7ED3</a></li><li><a href="https:%5Cu002F%5Cu002Fjuejin.cn%5Cu002Fuser%5Cu002F1943592288395479%5Cu002Fpins">\u516D\u70B9\u6253\u5361\u4EA4\u6D41\u7FA4</a></li><li><a href="https:%5Cu002F%5Cu002Fjuejin.cn%5Cu002Fpost%5Cu002F7007243669921071117">\u6211\u4E3A\u4EC0\u4E48\u559C\u6B22\u624B\u6284\u4EE3\u7801</a></li><li><a href="https:%5Cu002F%5Cu002Fjuejin.cn%5Cu002Fpost%5Cu002F7016189093851693069">\u524D\u7AEF\u4E09\u5E74\uFF1A\u5C0F\u767D\u53D8\u6210\u8001\u6CB9\u6761</a></li><li><a href="https:%5Cu002F%5Cu002Fjuejin.cn%5Cu002Fpost%5Cu002F7008027646898487326">\u4ECA\u5E74\u9762\u8BD5\u4E86100+\u7684\u524D\u7AEF\u540C\u5B66\u6211\u7684\u603B\u7ED3</a></li><li><a href="https:%5Cu002F%5Cu002Fjuejin.cn%5Cu002Fpost%5Cu002F7000659708948250660#comment">\u6211\u4E3A\u4EC0\u4E48\u575A\u6301\u516D\u70B9\u8D77\u5E8A</a></li><li><a href="https:%5Cu002F%5Cu002Fjuejin.cn%5Cu002Fpost%5Cu002F7004611718009585678">\u6211\u8BFB\u6280\u672F\u4E66\u5F88\u7126\u8651\uFF0C\u8BFB\u4E0D\u4E0B\u53BB\u4E66\u600E\u4E48\u529E\uFF1F</a></li><li><a href="https:%5Cu002F%5Cu002Fjuejin.cn%5Cu002Fpost%5Cu002F7002030597581307941">\u52E4\u594B\u52AA\u529B === &quot;\u5377&quot; \uFF1F</a></li><li><a href="https:%5Cu002F%5Cu002Fjuejin.cn%5Cu002Fpost%5Cu002F6991728251034959885">vite + react + ts \u624B\u6478\u624B\u505A\u9879\u76EE\u7CFB\u5217\u4E00 \uFF08\u9879\u76EE\u914D\u7F6E\u7BC7\uFF09</a></li><li><a href="https:%5Cu002F%5Cu002Fjuejin.cn%5Cu002Fpost%5Cu002F6997560918418653198">vite + react + ts \u624B\u6478\u624B\u505A\u9879\u76EE\u7CFB\u5217\u4E8C \uFF08\u5B9E\u6218\u7BC7\uFF09</a></li></ul>',18),t=[h];function r(n,s){return i(),a("div",null,t)}var F=e(l,[["render",r],["__file","jielehenduosihuodiganchu.html.vue"]]);export{F as default};
diff --git a/dist/assets/jinan.html.95982728.js b/dist/assets/jinan.html.95982728.js
new file mode 100644
index 00000000..12cf0608
--- /dev/null
+++ b/dist/assets/jinan.html.95982728.js
@@ -0,0 +1 @@
+import{_ as r}from"./plugin-vue_export-helper.21dcd24c.js";import{r as c,o as n,c as i,a as e,b as d,e as h,d as a}from"./app.615e41d8.js";const p={},o=h('<h2 id="part1-\u5DE5\u4F5C\u673A\u4F1A" tabindex="-1"><a class="header-anchor" href="#part1-\u5DE5\u4F5C\u673A\u4F1A" aria-hidden="true">#</a> Part1 \u5DE5\u4F5C\u673A\u4F1A</h2><p>\u7ECF\u8FC7\u8C03\u67E5\u53D1\u73B0\uFF0C\u6D4E\u5357\u7684\u4E92\u8054\u7F51\u73AF\u5883\u662F\u633A\u5DEE\u7684\uFF0C\u5927\u7684\u516C\u53F8\u51E0\u4E4E\u4E0D\u4F1A\u5728\u6D4E\u5357\u6210\u89C4\u6A21\u7684\u62DB\u7A0B\u5E8F\u5458\u3002</p><p>\u5982\u679C\u4F60\u662F\u4E00\u4E2A\u5E94\u5C4A\u6BD5\u4E1A\u751F\uFF0C\u62FF\u5230\u6D4E\u5357\u963F\u91CC\u3001\u534E\u4E3A\u3001\u6D77\u5EB7\u3001\u94C1\u8DEF\u5C40\u7B49 offer \u7684\u8BDD\uFF0C\u60F3\u8981\u79BB\u5BB6\u8FD1\u751F\u6D3B\u6BD4\u8F83\u8212\u670D\u90A3\u4E48\u503C\u5F97\u53BB\u3002\u5176\u4F59\u7684\u516C\u53F8\u6211\u4E0D\u5EFA\u8BAE\u6821\u62DB\u76F4\u63A5\u53BB\uFF0C\u60F3\u53BB\u53EF\u4EE5\u5148\u53BB\u5916\u9762\u7684\u5927\u516C\u53F8\u5E72\u51E0\u5E74\uFF0C\u793E\u62DB\u518D\u56DE\u6765\u3002\u9664\u975E\u662F\u6CA1\u6709\u66F4\u597D\u7684 offer\u3002</p><p>\u53E6\u5916\uFF0C\u5982\u679C\u4F60\u60F3\u4E00\u76F4\u5F85\u5728\u6D4E\u5357\uFF0C\u4E0D\u5982\u53BB\u4E2A\u6709\u7F16\u5236\u7684\u5730\u65B9\uFF0C\u867D\u7136\u6211\u5BF9\u6280\u672F\u6709\u6267\u5FF5\uFF0C\u4F46\u662F\u4E5F\u4E0D\u5F97\u4E0D\u627F\u8BA4\u5728\u5C71\u4E1C\u8FD8\u662F\u53BB\u4E2A\u6709\u7F16\u5236\u7684\u5730\u65B9\u9999\u3002</p><h3 id="\u963F\u91CC\u5DF4\u5DF4" tabindex="-1"><a class="header-anchor" href="#\u963F\u91CC\u5DF4\u5DF4" aria-hidden="true">#</a> \u963F\u91CC\u5DF4\u5DF4</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/jinan-52693980-e0eb-4781-94ca-fe15c0363410.png" alt=""></p><p>\u963F\u91CC\u5DF4\u5DF4\u5728\u6D4E\u5357\u62DB\u5F00\u53D1\u7684\u90E8\u95E8\u662F\u672C\u5730\u751F\u6D3B\uFF0C\u5F00\u53D1\u7684\u4E1A\u52A1\u662F\u5546\u5BB6\u8FD0\u8425\u548C\u9910\u996E\u4F9B\u5E94\u94FE\u4EE5\u53CA\u626B\u7801\u70B9\u9910\uFF0C\u85AA\u8D44\u6C34\u5E73\u4F1A\u6BD4\u676D\u5DDE\u5317\u4EAC\u7B49\u5730\u4F4E\u4E00\u4E9B\u3002\u56E0\u4E3A\u963F\u91CC\u5728\u6D4E\u5357\u5C31\u90A3\u4E48\u591A\u4EBA\uFF0C\u6240\u4EE5 hc 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alt=""></p><p>\u6D4E\u5357\u662F\u6D6A\u6F6E\u7684\u5927\u672C\u8425\uFF0C\u6D6A\u6F6E\u5728\u6D4E\u5357\u7684\u5C97\u4F4D\u975E\u5E38\u591A\uFF0C\u8F6F\u4EF6\u3001\u786C\u4EF6\u3001\u7B97\u6CD5\u90FD\u6709\u3002\u6821\u62DB\u5F85\u9047\u65B9\u9762\u53D7\u5C97\u4F4D\u548C\u5B66\u5386\u7684\u5F71\u54CD\u5F88\u5927\uFF0C\u7855\u58EB\u4F1A\u6BD4\u672C\u79D1\u751F\u9AD8\u4E00\u4E24\u5343\uFF0C\u7B97\u6CD5\uFF0Cic \u7C7B\u5C97\u4F4D\u7684\u85AA\u8D44\u4F1A\u6BD4\u8F6F\u4EF6\u5F00\u53D1\u591A\u4E0D\u5C11\u3002\u6708\u85AA\u57FA\u672C\u5728 9-15k \u4E4B\u95F4\uFF0C \u5982\u679C\u4F60\u662F\u672C\u79D1\u4E14\u505A\u8F6F\u4EF6\u5F00\u53D1\uFF0C\u57FA\u672C\u4E0A\u5C31\u662F 9-10k \u4E86\uFF0C\u597D\u4E00\u4E9B\u5B66\u6821\u7684\u7855\u58EB\u4E14\u5C97\u4F4D\u662F\u7B97\u6CD5\u4E4B\u7C7B\u7684\u6708\u85AA\u5DEE\u4E0D\u591A\u4F1A\u572815k \u5DE6\u53F3\u3002\u53E6\u5916\u6D6A\u6F6E\u6BCF\u6708\u6709\u52A0\u8D77\u6765 1k \u7684\u623F\u8865\uFF0C\u516C\u79EF\u91D1\u6EE1\u989D\u3002\u5DE5\u4F5C\u5F3A\u5EA6\u65B9\u9762\uFF0C\u6D6A\u6F6E\u52A0\u73ED\u5F88\u731B\uFF0C\u4F46\u662F\u9664\u4E86\u6CD5\u5B9A\u8282\u5047\u65E5\u6709\u52A0\u73ED\u8D39\u5916\uFF0C\u5E73\u65F6\u52A0\u73ED\u5C31\u6CA1\u52A0\u73ED\u8D39\u4E86\u3002</p><h3 id="\u534E\u4E3A" tabindex="-1"><a class="header-anchor" href="#\u534E\u4E3A" aria-hidden="true">#</a> \u534E\u4E3A</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/jinan-f74af12b-73e1-4455-8ad9-1cecda84a21a.png" alt=""></p><p>\u5BF9\uFF0C\u4F60\u6CA1\u770B\u9519\uFF0C\u534E\u4E3A\u5728\u6D4E\u5357\u662F\u62DB\u5F00\u53D1\u5C97\u7684\uFF0C\u4E0D\u8FC7 hc \u4E0D\u591A\u3002\u5728\u6D4E\u5357\u7684\u534E\u4E3A\u6BCF\u5E74\u6821\u62DB\u7684 hc \u5C31\u662F\u4E2A\u4F4D\u6570\uFF0C\u793E\u62DB\u60F3\u8FDB\u53BB\u7684\u8BDD\u57FA\u672C\u4E0A\u5C31\u662F\u901A\u8FC7\u534E\u4E3A OD \u4E86\u3002</p><p>\u5F88\u591A\u540C\u5B66\u597D\u5947\u534E\u4E3AOD \u548C\u534E\u4E3A\u6B63\u5F0F offer \u7684\u533A\u522B\uFF0C\u6211\u4E5F\u5C31\u8FD9\u4E2A\u95EE\u9898\u8BF7\u6559\u4E86\u4E0B\u5728\u534E\u4E3A\u5DE5\u4F5C\u7684\u6211\u7684\u540C\u5B66\u3002\u542C\u5230\u7684\u8BF4\u6CD5\u662F\uFF0C\u76EE\u524D\u534E\u4E3A\u793E\u62DB\u5361\u7684\u5F88\u4E25\uFF0C\u9664\u975E\u662F 17 \u6216 18 \u4EE5\u4E0A\u7684\u9AD8\u804C\u7EA7\uFF0C\u5426\u5219\u90FD\u9700\u8981\u4EE5 OD \u7684\u5F62\u5F0F\u8FDB\u534E\u4E3A\u3002</p><p>\u5982\u679C\u4F60\u6821\u62DB\u66FE\u7ECF\u62FF\u8FC7\u534E\u4E3A\u7684 offer \u4F46\u662F\u6CA1\u53BB\uFF0C\u90A3\u4E48\u4EE5\u540E\u793E\u62DB\u4E5F\u662F\u6709\u53EF\u80FD\u76F4\u63A5\u7ED9\u4F60\u6B63\u5F0F offer \u7684\u3002\u534E\u4E3A OD \u662F\u548C\u5916\u4F01\u5FB7\u79D1\u7B7E\uFF08\u5916\u4F01\u5FB7\u79D1\u8FD9\u4E2A\u540D\u5B57\u786E\u5B9E\u6709\u70B9\u9017\uFF0C\u867D\u7136\u4ED6\u53EB\u5916\u4F01\u5FB7\u79D1\u4F46\u662F\u4ED6\u4E0D\u662F\u5916\u4F01\uFF09\uFF0COD \u548C\u534E\u4E3A\u6B63\u5F0F\u5458\u5DE5\u662F\u540C\u5DE5\u540C\u916C\uFF0C\u4E0D\u8FC7\u6CA1\u6709\u80A1\u7968\uFF0C\u7A33\u5B9A\u6027\u4E5F\u548C\u6B63\u5F0F\u804C\u5DE5\u5DEE\u70B9\u3002</p><p>\u8FD9\u70B9\u548C\u8F6F\u901A\u52A8\u529B\u3001\u4E2D\u8F6F\u56FD\u9645\u7B49\u6D3E\u5230\u534E\u4E3A\u5DE5\u4F5C\u7684\u4E0D\u592A\u4E00\u6837\uFF0C\u8F6F\u901A\u52A8\u529B\u548C\u4E2D\u8F6F\u56FD\u9645\u6709\u4E00\u5957\u81EA\u5DF1\u7684\u85AA\u8D44\u4F53\u7CFB\u3002\u534E\u4E3A OD \u6BCF\u5E74\u4F1A\u6709\u4E00\u6B21\u53D8\u6210\u6B63\u5F0F\u804C\u5DE5\u7684\u673A\u4F1A\u3002</p><p>\u6D4E\u5357\u8FD9\u8FB9\u7684\u534E\u4E3A\u8C8C\u4F3C\u662F\u4E00\u4E2A\u7814\u53D1\u4E2D\u5FC3\u7684\u5206\u90E8\uFF08\u597D\u50CF\u662F\u5357\u4EAC\u7814\u53D1\u4E2D\u5FC3\u7684\u5206\u90E8\uFF09\uFF0C\u516C\u53F8\u6CE8\u518C\u5730\u4E0D\u5728\u6D4E\u5357\uFF0C\u65E0\u6CD5\u9886\u53D6\u6D4E\u5357\u5E02\u653F\u5E9C\u7684\u4EBA\u624D\u8865\u8D34\uFF08\u7855\u58EB\u6BCF\u6708\u6709\u4E00\u5343\u5DE6\u53F3\u7684\u4EBA\u624D\u8865\u8D34\uFF09\u3002\u6211\u770B\u6D4E\u5357\u8FD9\u8FB9\u6709\u6821\u62DB 14 \u7EA7\u7684\u540C\u5B66\u7206\u6599\u85AA\u8D44\u662F 19k x 14\uFF0C\u5176\u4E2D\u6BCF\u6708\u6709 4k \u662F\u7EE9\u6548\uFF0C\u516C\u79EF\u91D1\u6309\u5DE5\u8D44\u7684 5%\u4EA4\u3002</p><h3 id="\u6D77\u5EB7\u5A01\u89C6" tabindex="-1"><a class="header-anchor" href="#\u6D77\u5EB7\u5A01\u89C6" aria-hidden="true">#</a> \u6D77\u5EB7\u5A01\u89C6</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/jinan-60bc84b2-fd87-4c7a-bcb0-da6134786313.png" alt=""></p><p>\u6D77\u5EB7\u5A01\u89C6\u4E5F\u662F\u6D4E\u5357\u7A0B\u5E8F\u5458\u6BD4\u8F83\u4E0D\u9519\u7684\u53BB\u5904\u4E86\uFF0C\u7855\u58EB\u5927\u90E8\u5206\u6708\u85AA\u662F 13k \uFF0C\u5C11\u91CF\u80FD\u5230 15k\uFF0C\u672C\u79D1\u751F\u8FDB\u6D77\u5EB7\u8C8C\u4F3C\u7EDF\u4E00\u4EF7\u90FD\u662F 9k\uFF0C\u6BCF\u5E7413-15 \u4E2A\u6708\u7684\u85AA\u8D44\u3002\u6BCF\u5929\u6709 45 \u7684\u9910\u8865\uFF0C10\u5757\u94B1\u7684\u4EA4\u901A\u8865\uFF0C\u901A\u8BAF\u8865\u8D34\u6BCF\u6708 200\u3002\u6708\u85AA\u768420% \u662F\u7EE9\u6548\uFF0C\u6309\u57FA\u672C\u5DE5\u8D44\u7684 12% \u7F34\u7EB3\u4F4F\u623F\u516C\u79EF\u91D1\u3002\u5DE5\u4F5C\u5236\u5EA6\u662F\u5927\u5C0F\u5468\u3002\u867D\u7136\u6D77\u5EB7\u6709\u5F88\u591A\u69FD\u70B9\uFF0C\u4F46\u662F\u6280\u672F\u8FD8\u662F\u4E0D\u9519\u7684\uFF0C\u6709\u4E0D\u5C11\u503C\u5F97\u5B66\u4E60\u7684\u5730\u65B9\uFF0C\u53E6\u5916\u80FD\u5728\u6D4E\u5357\u7ED9\u5230\u8FD9\u4E2A\u85AA\u8D44\uFF0C\u6211\u89C9\u5F97\u8FD8\u662F\u4E0D\u9519\u7684\u3002</p><h3 id="\u8054\u901A\u8F6F\u4EF6\u7814\u7A76\u9662" tabindex="-1"><a class="header-anchor" href="#\u8054\u901A\u8F6F\u4EF6\u7814\u7A76\u9662" aria-hidden="true">#</a> \u8054\u901A\u8F6F\u4EF6\u7814\u7A76\u9662</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/jinan-d10a741e-bc19-4c92-b03d-9f7f295837d9.png" alt=""></p><p>\u76EE\u524D\u770B\u7206\u6599\u6D4E\u5357\u7684\u8054\u901A\u8F6F\u4EF6\u7814\u7A76\u9662\u60C5\u51B5\u7684\u57FA\u672C\u90FD\u662F\u7855\u58EB\uFF0C\u7A0E\u524D 9k\uFF08\u672C\u79D1\u8FD8\u8981\u5C11\u4E00\u70B9\uFF09\uFF0C\u6BCF\u5E74 15-16\u4E2A\u6708\u7684\u85AA\u8D44\uFF0C\u989D\u5916\u8FD8\u4F1A\u6709\u4E00\u4E9B\u8865\u8D34\u3002\u6446\u660E\u8BF4\u8981\u52A0\u73ED\uFF0C\u5DE5\u4F5C\u5236\u5EA6\u57FA\u672C 996\uFF0C\u4E14\u52A0\u73ED\u6CA1\u6709\u52A0\u73ED\u8D39\u3002\u76EE\u524D\u7F51\u4E0A\u7684\u8BC4\u4EF7\u4E0D\u662F\u592A\u597D\u3002\u5728\u6240\u6709\u7684\u8054\u901A\u8F6F\u4EF6\u7814\u7A76\u9662\u91CC\u7B97\u6BD4\u8F83\u5377\u7684\u3002</p><h3 id="\u4E2D\u56FD\u91CD\u6C7D" tabindex="-1"><a class="header-anchor" href="#\u4E2D\u56FD\u91CD\u6C7D" aria-hidden="true">#</a> \u4E2D\u56FD\u91CD\u6C7D</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/jinan-97191e20-997b-4203-9f23-1c761154bde8.png" alt=""></p><p>\u91CD\u6C7D\u62DB\u7684\u8F6F\u4EF6\u5F00\u53D1\u7684\u5C97\u4F4D\u4E5F\u4E0D\u5C11\uFF0C\u6821\u62DB\u8FDB\u53BB\u6708\u85AA\u662F 15-20k x 12\uFF0C\u5E74\u7EC8\u5956\u5F88\u5C11\uFF0C\u5C31\u51E0\u5343\u3002\u53E6\u5916\u7B2C\u4E8C\u5E74\u4F1A\u628A\u85AA\u8D44\u7684\u4E00\u90E8\u5206\u8F6C\u5316\u6210\u7EE9\u6548\uFF0C\u7EE9\u6548\u4E0D\u8FBE\u6807\u85AA\u8D44\u5C31\u53D1\u4E0D\u6EE1\u4E86\uFF0C\u76F8\u5F53\u4E8E\u53D8\u76F8\u964D\u85AA\u3002\u91CD\u6C7D\u867D\u7136\u662F\u56FD\u4F01\uFF0C\u4F46\u4E0D\u592A\u50CF\u56FD\u4F01\u7684\u4F5C\u98CE\uFF0C\u6709\u672B\u5C3E\u6DD8\u6C70\uFF0C\u5468\u672B\u7ECF\u5E38\u52A0\u73ED\u3002\u597D\u50CF\u524D\u51E0\u4E2A\u6708\u8FD8\u8981\u8F6E\u5C97\uFF0C\u4E0A\u6D41\u6C34\u7EBF\u8DDF\u5DE5\u4EBA\u4E00\u5757\u7EC4\u88C5\u6C7D\u8F66\u3002</p><h3 id="\u94C1\u8DEF\u5C40\u6D4E\u5357\u4FE1\u606F\u6240" tabindex="-1"><a class="header-anchor" href="#\u94C1\u8DEF\u5C40\u6D4E\u5357\u4FE1\u606F\u6240" aria-hidden="true">#</a> \u94C1\u8DEF\u5C40\u6D4E\u5357\u4FE1\u606F\u6240</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/jinan-f6c82ef5-14a6-4c9c-8bc2-56b4b59c9152.png" alt=""></p><p>hr \u8BF4\u7684\u7A0E\u524D\u5E74\u85AA\u603B\u5305\u662F 15 w\uFF0C\u7F51\u4E0A\u7684\u4FE1\u606F\u6BD4\u8F83\u5C11\uFF0C\u76F2\u731C\u98CE\u683C\u5E94\u8BE5\u548C\u90D1\u5DDE\u94C1\u8DEF\u5C40\u7684\u4FE1\u606F\u6240\u5DEE\u4E0D\u591A\uFF0C\u5E94\u8BE5\u662F\u4F1A\u6709\u52A0\u73ED\uFF0C\u4F46\u5DE5\u4F5C\u7A33\u5B9A\u3002</p><h3 id="\u9F50\u9C81\u7A7A\u5929\u4FE1\u606F\u7814\u7A76\u9662" tabindex="-1"><a class="header-anchor" href="#\u9F50\u9C81\u7A7A\u5929\u4FE1\u606F\u7814\u7A76\u9662" aria-hidden="true">#</a> \u9F50\u9C81\u7A7A\u5929\u4FE1\u606F\u7814\u7A76\u9662</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/jinan-ea15afb0-62d8-4031-9c20-13a04da269d2.png" alt=""></p><p>\u85AA\u8D44\u5DEE\u4E0D\u591A\u662F\u7A0E\u524D 12k x 14 \u7684\u6837\u5B50\uFF0C\u4F46\u662F\u6BCF\u6708\u5DE5\u8D44\u91CC\u9762\u4E00\u90E8\u5206\u662F\u7EE9\u6548\uFF0C\u5982\u679C\u9879\u76EE\u4E0D\u591A\u7684\u8BDD\u7EE9\u6548\u62FF\u4E0D\u6EE1\u3002\u53E6\u5916\u51FA\u5DEE\u5F88\u591A\uFF0C\u611F\u89C9\u6027\u4EF7\u6BD4\u4E00\u822C\u3002</p><p>\u6D4E\u5357\u6211\u4E86\u89E3\u5230\u7684\u5927\u578B\u7684\u516C\u53F8\u4E14\u62DB\u7A0B\u5E8F\u5458\u7684\u53EA\u6709\u8FD9\u4E48\u591A\u4E86\u3002\u5012\u662F\u8FD8\u6709\u5F88\u591A\u5C0F\u578B\u516C\u53F8\uFF0C\u5927\u5BB6\u53EF\u4EE5\u5728 boss \u3001\u62C9\u94A9\u7B49\u62DB\u8058\u7F51\u7AD9\u76F4\u63A5\u641C\uFF0C\u56E0\u4E3A\u8FD9\u4E9B\u516C\u53F8\u4FE1\u606F\u5F88\u5C11\uFF0C\u6211\u6CA1\u4E86\u89E3\u5230\u4EC0\u4E48\u6709\u6548\u4FE1\u606F\uFF0C\u5C31\u4E0D\u4ECB\u7ECD\u4E86\u3002\u5927\u5BB6\u5982\u679C\u8FD8\u77E5\u9053\u54EA\u4E9B\u4E0D\u9519\u7684\u6D4E\u5357\u7684\u7A0B\u5E8F\u5458\u7684\u5DE5\u4F5C\u673A\u4F1A\uFF0C\u4E5F\u6B22\u8FCE\u8DDF\u6211\u8BF4\u3002\u5BF9\u4E86\uFF0C\u6211\u4E86\u89E3\u5230\u5C71\u4E1C\u9AD8\u901F\u4F1A\u62DB\u4E00\u4E9B\u7A0B\u5E8F\u5458\uFF0C\u5F85\u9047\u4E0D\u9519\uFF0C\u5927\u5BB6\u53EF\u4EE5\u53BB\u8BE6\u7EC6\u4E86\u89E3\u4E0B\u3002</p><h2 id="part2-\u751F\u6D3B" tabindex="-1"><a class="header-anchor" href="#part2-\u751F\u6D3B" aria-hidden="true">#</a> Part2 \u751F\u6D3B</h2><h3 id="\u623F\u4EF7" tabindex="-1"><a class="header-anchor" href="#\u623F\u4EF7" aria-hidden="true">#</a> \u623F\u4EF7</h3><p>\u76F8\u6BD4\u4E8E\u6D4E\u5357\u7684\u5DE5\u8D44\u6C34\u5E73\uFF0C\u6D4E\u5357\u7684\u623F\u4EF7\u771F\u7684\u662F\u6709\u70B9\u9AD8\u554A\u3002\u6D4E\u5357\u7684\u623F\u4EF7\u524D\u6BB5\u65F6\u95F4\u4E00\u76F4\u8DCC\uFF0C\u4F46\u76EE\u524D\u5728\u540C\u7C7B\u578B\u4E8C\u7EBF\u57CE\u5E02\u4E2D\uFF0C\u4F9D\u7136\u7B97\u623F\u4EF7\u504F\u9AD8\u7684\u4E86\u3002\u6211\u5728\u7F51\u4E0A\u627E\u4E86\u4E2A\u56FE\uFF0C\u4E0D\u662F\u592A\u51C6\uFF0C\u5927\u5BB6\u53EF\u4EE5\u505A\u4E2A\u53C2\u8003\u3002\u5728\u6D4E\u5357\u5DE5\u8D44\u7684\u80CC\u666F\u4E0B\uFF0C\u5728\u6D4E\u5357\u5E74\u8F7B\u4EBA\u4E70\u623F\u538B\u529B\u662F\u633A\u5927\u5440\uFF01</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/jinan-6f426bc3-7dbc-4bd8-91c1-4660a945a5f5.png" alt=""></p><h3 id="\u6559\u80B2" tabindex="-1"><a class="header-anchor" href="#\u6559\u80B2" aria-hidden="true">#</a> \u6559\u80B2</h3><p>\u6559\u80B2\u4E0A\u4E0D\u7528\u6211\u591A\u8BF4\uFF0C\u5C71\u4E1C\u7684\u6559\u80B2\u771F\u7684\u662F\u592A\u5377\u4E86\uFF0C\u5C71\u4E1C\u7684\u9AD8\u8003\u96BE\u5EA6\u771F\u7684\u662F\u5730\u72F1\u7EA7\u3002\u6211\u8EAB\u8FB9\u7684\u5C71\u4E1C\u540C\u5B66\u90FD\u5B66\u4E60\u633A\u4E0D\u9519\u7684\uFF0C\u4E5F\u96BE\u602A\uFF0C\u5728\u5C71\u4E1C\u6740\u51FA\u91CD\u56F4\u8003\u4E0A\u597D\u4E00\u70B9\u5927\u5B66\u7684\uFF0C\u5F53\u5E74\u5728\u5C71\u4E1C\u90A3\u90FD\u662F\u82F1\u96C4\u4E00\u822C\u7684\u4EBA\u7269\u3002\u8BFB\u7814\u65F6\u5E26\u6211\u7684\u5E08\u5144\uFF0C\u4EE5\u53CA\u597D\u51E0\u4E2A\u5173\u7CFB\u4E0D\u9519\u7684\u540C\u5B66\uFF0C\u8FD8\u6709\u6211\u73B0\u5728\u7684\u7EC4\u957F\u90FD\u662F\u5C71\u4E1C\u7684\uFF0C\u4ED6\u4EEC\u90FD\u7ED9\u6211\u4E00\u79CD\u5F88\u52AA\u529B\uFF0C\u80AF\u5403\u82E6\uFF0C\u4E14\u5F88\u8E0F\u5B9E\u7684\u611F\u89C9\u3002\u6211\u662F\u633A\u559C\u6B22\u548C\u5C71\u4E1C\u4EBA\u76F8\u5904\u7684\u3002</p><p>\u9AD8\u6821\u7684\u8BA1\u7B97\u673A\u4E13\u4E1A\u8D44\u6E90\u65B9\u9762\uFF0C\u611F\u89C9\u6D4E\u5357\u4E0D\u5982\u9752\u5C9B\uFF0C\u4E2D\u56FD\u6D77\u6D0B\u5927\u5B66\u548C\u4E2D\u56FD\u77F3\u6CB9\u5927\u5B66\u90FD\u5728\u9752\u5C9B\uFF0C\u5C71\u4E1C\u5927\u5B66\u7684\u8BA1\u7B97\u673A\u4E13\u4E1A\u4E00\u90E8\u5206\u4E5F\u653E\u5728\u4E86\u9752\u5C9B\u3002\u8FD9\u6837\u611F\u89C9\u6D4E\u5357\u4ECA\u540E\u8BA1\u7B97\u673A\u4EBA\u624D\u7684\u79EF\u7D2F\u80AF\u5B9A\u4E0D\u5982\u9752\u5C9B\u3002\u6240\u4EE5\u8BA1\u7B97\u673A\u76F8\u5173\u884C\u4E1A\u53D1\u5C55\u6211\u8FD8\u662F\u66F4\u770B\u597D\u9752\u5C9B\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/jinan-d222ea8c-6d83-4cd6-8cf7-3f7fd2fa1838.png" alt=""></p><h3 id="\u98CE\u666F-and-\u4EA4\u901A-and-\u7F8E\u98DF" tabindex="-1"><a class="header-anchor" href="#\u98CE\u666F-and-\u4EA4\u901A-and-\u7F8E\u98DF" aria-hidden="true">#</a> \u98CE\u666F and \u4EA4\u901A and 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diff --git a/dist/assets/jinan.html.d4c22f59.js b/dist/assets/jinan.html.d4c22f59.js
new file mode 100644
index 00000000..9cc45c9f
--- /dev/null
+++ b/dist/assets/jinan.html.d4c22f59.js
@@ -0,0 +1 @@
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diff --git a/dist/assets/jishuzongjianbeikaichuliao.html.1774b950.js b/dist/assets/jishuzongjianbeikaichuliao.html.6397e62a.js
similarity index 99%
rename from dist/assets/jishuzongjianbeikaichuliao.html.1774b950.js
rename to dist/assets/jishuzongjianbeikaichuliao.html.6397e62a.js
index e14ebf1c..47d3719e 100644
--- a/dist/assets/jishuzongjianbeikaichuliao.html.1774b950.js
+++ b/dist/assets/jishuzongjianbeikaichuliao.html.6397e62a.js
@@ -1 +1 @@
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diff --git a/dist/assets/jit.html.4cb31299.js b/dist/assets/jit.html.cd04156f.js
similarity index 99%
rename from dist/assets/jit.html.4cb31299.js
rename to dist/assets/jit.html.cd04156f.js
index dc7a6e98..2cc932c7 100644
--- a/dist/assets/jit.html.4cb31299.js
+++ b/dist/assets/jit.html.cd04156f.js
@@ -1,4 +1,4 @@
-import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e}from"./app.a0271b9c.js";const p={},t=e(`<h1 id="java\u5373\u65F6\u7F16\u8BD1-jit-\u5668\u539F\u7406\u89E3\u6790\u53CA\u5B9E\u8DF5" tabindex="-1"><a class="header-anchor" href="#java\u5373\u65F6\u7F16\u8BD1-jit-\u5668\u539F\u7406\u89E3\u6790\u53CA\u5B9E\u8DF5" aria-hidden="true">#</a> Java\u5373\u65F6\u7F16\u8BD1\uFF08JIT\uFF09\u5668\u539F\u7406\u89E3\u6790\u53CA\u5B9E\u8DF5</h1><h2 id="\u4E00\u3001\u5BFC\u8BFB" tabindex="-1"><a class="header-anchor" href="#\u4E00\u3001\u5BFC\u8BFB" aria-hidden="true">#</a> \u4E00\u3001\u5BFC\u8BFB</h2><p>\u5E38\u89C1\u7684\u7F16\u8BD1\u578B\u8BED\u8A00\u5982C++\uFF0C\u901A\u5E38\u4F1A\u628A\u4EE3\u7801\u76F4\u63A5\u7F16\u8BD1\u6210CPU\u6240\u80FD\u7406\u89E3\u7684\u673A\u5668\u7801\u6765\u8FD0\u884C\u3002\u800CJava\u4E3A\u4E86\u5B9E\u73B0\u201C\u4E00\u6B21\u7F16\u8BD1\uFF0C\u5904\u5904\u8FD0\u884C\u201D\u7684\u7279\u6027\uFF0C\u628A\u7F16\u8BD1\u7684\u8FC7\u7A0B\u5206\u6210\u4E24\u90E8\u5206\uFF0C\u9996\u5148\u5B83\u4F1A\u5148\u7531javac\u7F16\u8BD1\u6210\u901A\u7528\u7684\u4E2D\u95F4\u5F62\u5F0F\u2014\u2014\u5B57\u8282\u7801\uFF0C\u7136\u540E\u518D\u7531\u89E3\u91CA\u5668\u9010\u6761\u5C06\u5B57\u8282\u7801\u89E3\u91CA\u4E3A\u673A\u5668\u7801\u6765\u6267\u884C\u3002\u6240\u4EE5\u5728\u6027\u80FD\u4E0A\uFF0CJava\u901A\u5E38\u4E0D\u5982C++\u8FD9\u7C7B\u7F16\u8BD1\u578B\u8BED\u8A00\u3002</p><p>\u4E3A\u4E86\u4F18\u5316Java\u7684\u6027\u80FD \uFF0CJVM\u5728\u89E3\u91CA\u5668\u4E4B\u5916\u5F15\u5165\u4E86\u5373\u65F6\uFF08Just In Time\uFF09\u7F16\u8BD1\u5668\uFF1A\u5F53\u7A0B\u5E8F\u8FD0\u884C\u65F6\uFF0C\u89E3\u91CA\u5668\u9996\u5148\u53D1\u6325\u4F5C\u7528\uFF0C\u4EE3\u7801\u53EF\u4EE5\u76F4\u63A5\u6267\u884C\u3002\u968F\u7740\u65F6\u95F4\u63A8\u79FB\uFF0C\u5373\u65F6\u7F16\u8BD1\u5668\u9010\u6E10\u53D1\u6325\u4F5C\u7528\uFF0C\u628A\u8D8A\u6765\u8D8A\u591A\u7684\u4EE3\u7801\u7F16\u8BD1\u4F18\u5316\u6210\u672C\u5730\u4EE3\u7801\uFF0C\u6765\u83B7\u53D6\u66F4\u9AD8\u7684\u6267\u884C\u6548\u7387\u3002\u89E3\u91CA\u5668\u8FD9\u65F6\u53EF\u4EE5\u4F5C\u4E3A\u7F16\u8BD1\u8FD0\u884C\u7684\u964D\u7EA7\u624B\u6BB5\uFF0C\u5728\u4E00\u4E9B\u4E0D\u53EF\u9760\u7684\u7F16\u8BD1\u4F18\u5316\u51FA\u73B0\u95EE\u9898\u65F6\uFF0C\u518D\u5207\u6362\u56DE\u89E3\u91CA\u6267\u884C\uFF0C\u4FDD\u8BC1\u7A0B\u5E8F\u53EF\u4EE5\u6B63\u5E38\u8FD0\u884C\u3002</p><p>\u5373\u65F6\u7F16\u8BD1\u5668\u6781\u5927\u5730\u63D0\u9AD8\u4E86Java\u7A0B\u5E8F\u7684\u8FD0\u884C\u901F\u5EA6\uFF0C\u800C\u4E14\u8DDF\u9759\u6001\u7F16\u8BD1\u76F8\u6BD4\uFF0C\u5373\u65F6\u7F16\u8BD1\u5668\u53EF\u4EE5\u9009\u62E9\u6027\u5730\u7F16\u8BD1\u70ED\u70B9\u4EE3\u7801\uFF0C\u7701\u53BB\u4E86\u5F88\u591A\u7F16\u8BD1\u65F6\u95F4\uFF0C\u4E5F\u8282\u7701\u5F88\u591A\u7684\u7A7A\u95F4\u3002\u76EE\u524D\uFF0C\u5373\u65F6\u7F16\u8BD1\u5668\u5DF2\u7ECF\u975E\u5E38\u6210\u719F\u4E86\uFF0C\u5728\u6027\u80FD\u5C42\u9762\u751A\u81F3\u53EF\u4EE5\u548C\u7F16\u8BD1\u578B\u8BED\u8A00\u76F8\u6BD4\u3002\u4E0D\u8FC7\u5728\u8FD9\u4E2A\u9886\u57DF\uFF0C\u5927\u5BB6\u4F9D\u7136\u5728\u4E0D\u65AD\u63A2\u7D22\u5982\u4F55\u7ED3\u5408\u4E0D\u540C\u7684\u7F16\u8BD1\u65B9\u5F0F\uFF0C\u4F7F\u7528\u66F4\u52A0\u667A\u80FD\u7684\u624B\u6BB5\u6765\u63D0\u5347\u7A0B\u5E8F\u7684\u8FD0\u884C\u901F\u5EA6\u3002</p><h2 id="\u4E8C\u3001java\u7684\u6267\u884C\u8FC7\u7A0B" tabindex="-1"><a class="header-anchor" href="#\u4E8C\u3001java\u7684\u6267\u884C\u8FC7\u7A0B" aria-hidden="true">#</a> 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src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/jit-9a62fc02-1a6a-451e-bb2b-19fc086d5be0.png" alt=""></p><h3 id="_1-jvm\u4E2D\u7684\u7F16\u8BD1\u5668" tabindex="-1"><a class="header-anchor" href="#_1-jvm\u4E2D\u7684\u7F16\u8BD1\u5668" aria-hidden="true">#</a> 1. JVM\u4E2D\u7684\u7F16\u8BD1\u5668</h3><p>JVM\u4E2D\u96C6\u6210\u4E86\u4E24\u79CD\u7F16\u8BD1\u5668\uFF0CClient Compiler\u548CServer Compiler\uFF0C\u5B83\u4EEC\u7684\u4F5C\u7528\u4E5F\u4E0D\u540C\u3002Client Compiler\u6CE8\u91CD\u542F\u52A8\u901F\u5EA6\u548C\u5C40\u90E8\u7684\u4F18\u5316\uFF0CServer Compiler\u5219\u66F4\u52A0\u5173\u6CE8\u5168\u5C40\u7684\u4F18\u5316\uFF0C\u6027\u80FD\u4F1A\u66F4\u597D\uFF0C\u4F46\u7531\u4E8E\u4F1A\u8FDB\u884C\u66F4\u591A\u7684\u5168\u5C40\u5206\u6790\uFF0C\u6240\u4EE5\u542F\u52A8\u901F\u5EA6\u4F1A\u53D8\u6162\u3002\u4E24\u79CD\u7F16\u8BD1\u5668\u6709\u7740\u4E0D\u540C\u7684\u5E94\u7528\u573A\u666F\uFF0C\u5728\u865A\u62DF\u673A\u4E2D\u540C\u65F6\u53D1\u6325\u4F5C\u7528\u3002</p><p><strong>Client Compiler</strong></p><p>HotSpot VM\u5E26\u6709\u4E00\u4E2AClient Compiler C1\u7F16\u8BD1\u5668\u3002\u8FD9\u79CD\u7F16\u8BD1\u5668\u542F\u52A8\u901F\u5EA6\u5FEB\uFF0C\u4F46\u662F\u6027\u80FD\u6BD4\u8F83Server Compiler\u6765\u8BF4\u4F1A\u5DEE\u4E00\u4E9B\u3002C1\u4F1A\u505A\u4E09\u4EF6\u4E8B\uFF1A</p><ul><li>\u5C40\u90E8\u7B80\u5355\u53EF\u9760\u7684\u4F18\u5316\uFF0C\u6BD4\u5982\u5B57\u8282\u7801\u4E0A\u8FDB\u884C\u7684\u4E00\u4E9B\u57FA\u7840\u4F18\u5316\uFF0C\u65B9\u6CD5\u5185\u8054\u3001\u5E38\u91CF\u4F20\u64AD\u7B49\uFF0C\u653E\u5F03\u8BB8\u591A\u8017\u65F6\u8F83\u957F\u7684\u5168\u5C40\u4F18\u5316\u3002</li><li>\u5C06\u5B57\u8282\u7801\u6784\u9020\u6210\u9AD8\u7EA7\u4E2D\u95F4\u8868\u793A\uFF08High-level Intermediate Representation\uFF0C\u4EE5\u4E0B\u79F0\u4E3AHIR\uFF09\uFF0CHIR\u4E0E\u5E73\u53F0\u65E0\u5173\uFF0C\u901A\u5E38\u91C7\u7528\u56FE\u7ED3\u6784\uFF0C\u66F4\u9002\u5408JVM\u5BF9\u7A0B\u5E8F\u8FDB\u884C\u4F18\u5316\u3002</li><li>\u6700\u540E\u5C06HIR\u8F6C\u6362\u6210\u4F4E\u7EA7\u4E2D\u95F4\u8868\u793A\uFF08Low-level Intermediate Representation\uFF0C\u4EE5\u4E0B\u79F0\u4E3ALIR\uFF09\uFF0C\u5728LIR\u7684\u57FA\u7840\u4E0A\u4F1A\u8FDB\u884C\u5BC4\u5B58\u5668\u5206\u914D\u3001\u7AA5\u5B54\u4F18\u5316\uFF08\u5C40\u90E8\u7684\u4F18\u5316\u65B9\u5F0F\uFF0C\u7F16\u8BD1\u5668\u5728\u4E00\u4E2A\u57FA\u672C\u5757\u6216\u8005\u591A\u4E2A\u57FA\u672C\u5757\u4E2D\uFF0C\u9488\u5BF9\u5DF2\u7ECF\u751F\u6210\u7684\u4EE3\u7801\uFF0C\u7ED3\u5408CPU\u81EA\u5DF1\u6307\u4EE4\u7684\u7279\u70B9\uFF0C\u901A\u8FC7\u4E00\u4E9B\u8BA4\u4E3A\u53EF\u80FD\u5E26\u6765\u6027\u80FD\u63D0\u5347\u7684\u8F6C\u6362\u89C4\u5219\u6216\u8005\u901A\u8FC7\u6574\u4F53\u7684\u5206\u6790\uFF0C\u8FDB\u884C\u6307\u4EE4\u8F6C\u6362\uFF0C\u6765\u63D0\u5347\u4EE3\u7801\u6027\u80FD\uFF09\u7B49\u64CD\u4F5C\uFF0C\u6700\u7EC8\u751F\u6210\u673A\u5668\u7801\u3002</li></ul><p><strong>Server Compiler</strong></p><p>Server Compiler\u4E3B\u8981\u5173\u6CE8\u4E00\u4E9B\u7F16\u8BD1\u8017\u65F6\u8F83\u957F\u7684\u5168\u5C40\u4F18\u5316\uFF0C\u751A\u81F3\u4F1A\u8FD8\u4F1A\u6839\u636E\u7A0B\u5E8F\u8FD0\u884C\u7684\u4FE1\u606F\u8FDB\u884C\u4E00\u4E9B\u4E0D\u53EF\u9760\u7684\u6FC0\u8FDB\u4F18\u5316\u3002\u8FD9\u79CD\u7F16\u8BD1\u5668\u7684\u542F\u52A8\u65F6\u95F4\u957F\uFF0C\u9002\u7528\u4E8E\u957F\u65F6\u95F4\u8FD0\u884C\u7684\u540E\u53F0\u7A0B\u5E8F\uFF0C\u5B83\u7684\u6027\u80FD\u901A\u5E38\u6BD4Client Compiler\u9AD830%\u4EE5\u4E0A\u3002\u76EE\u524D\uFF0CHotspot\u865A\u62DF\u673A\u4E2D\u4F7F\u7528\u7684Server Compiler\u6709\u4E24\u79CD\uFF1AC2\u548CGraal\u3002</p><p><strong>C2 Compiler</strong></p><p>\u5728Hotspot VM\u4E2D\uFF0C\u9ED8\u8BA4\u7684Server Compiler\u662FC2\u7F16\u8BD1\u5668\u3002</p><p>C2\u7F16\u8BD1\u5668\u5728\u8FDB\u884C\u7F16\u8BD1\u4F18\u5316\u65F6\uFF0C\u4F1A\u4F7F\u7528\u4E00\u79CD\u63A7\u5236\u6D41\u4E0E\u6570\u636E\u6D41\u7ED3\u5408\u7684\u56FE\u6570\u636E\u7ED3\u6784\uFF0C\u79F0\u4E3AIdeal Graph\u3002 Ideal Graph\u8868\u793A\u5F53\u524D\u7A0B\u5E8F\u7684\u6570\u636E\u6D41\u5411\u548C\u6307\u4EE4\u95F4\u7684\u4F9D\u8D56\u5173\u7CFB\uFF0C\u4F9D\u9760\u8FD9\u79CD\u56FE\u7ED3\u6784\uFF0C\u67D0\u4E9B\u4F18\u5316\u6B65\u9AA4\uFF08\u5C24\u5176\u662F\u6D89\u53CA\u6D6E\u52A8\u4EE3\u7801\u5757\u7684\u90A3\u4E9B\u4F18\u5316\u6B65\u9AA4\uFF09\u53D8\u5F97\u4E0D\u90A3\u4E48\u590D\u6742\u3002</p><p>Ideal Graph\u7684\u6784\u5EFA\u662F\u5728\u89E3\u6790\u5B57\u8282\u7801\u7684\u65F6\u5019\uFF0C\u6839\u636E\u5B57\u8282\u7801\u4E2D\u7684\u6307\u4EE4\u5411\u4E00\u4E2A\u7A7A\u7684Graph\u4E2D\u6DFB\u52A0\u8282\u70B9\uFF0CGraph\u4E2D\u7684\u8282\u70B9\u901A\u5E38\u5BF9\u5E94\u4E00\u4E2A\u6307\u4EE4\u5757\uFF0C\u6BCF\u4E2A\u6307\u4EE4\u5757\u5305\u542B\u591A\u6761\u76F8\u5173\u8054\u7684\u6307\u4EE4\uFF0CJVM\u4F1A\u5229\u7528\u4E00\u4E9B\u4F18\u5316\u6280\u672F\u5BF9\u8FD9\u4E9B\u6307\u4EE4\u8FDB\u884C\u4F18\u5316\uFF0C\u6BD4\u5982Global Value Numbering\u3001\u5E38\u91CF\u6298\u53E0\u7B49\uFF0C\u89E3\u6790\u7ED3\u675F\u540E\uFF0C\u8FD8\u4F1A\u8FDB\u884C\u4E00\u4E9B\u6B7B\u4EE3\u7801\u5254\u9664\u7684\u64CD\u4F5C\u3002\u751F\u6210Ideal Graph\u540E\uFF0C\u4F1A\u5728\u8FD9\u4E2A\u57FA\u7840\u4E0A\u7ED3\u5408\u6536\u96C6\u7684\u7A0B\u5E8F\u8FD0\u884C\u4FE1\u606F\u6765\u8FDB\u884C\u4E00\u4E9B\u5168\u5C40\u7684\u4F18\u5316\uFF0C\u8FD9\u4E2A\u9636\u6BB5\u5982\u679CJVM\u5224\u65AD\u6B64\u65F6\u6CA1\u6709\u5168\u5C40\u4F18\u5316\u7684\u5FC5\u8981\uFF0C\u5C31\u4F1A\u8DF3\u8FC7\u8FD9\u90E8\u5206\u4F18\u5316\u3002</p><p>\u65E0\u8BBA\u662F\u5426\u8FDB\u884C\u5168\u5C40\u4F18\u5316\uFF0CIdeal Graph\u90FD\u4F1A\u88AB\u8F6C\u5316\u4E3A\u4E00\u79CD\u66F4\u63A5\u8FD1\u673A\u5668\u5C42\u9762\u7684MachNode Graph\uFF0C\u6700\u540E\u7F16\u8BD1\u7684\u673A\u5668\u7801\u5C31\u662F\u4ECEMachNode Graph\u4E2D\u5F97\u7684\uFF0C\u751F\u6210\u673A\u5668\u7801\u524D\u8FD8\u4F1A\u6709\u4E00\u4E9B\u5305\u62EC\u5BC4\u5B58\u5668\u5206\u914D\u3001\u7AA5\u5B54\u4F18\u5316\u7B49\u64CD\u4F5C\u3002\u5173\u4E8EIdeal Graph\u548C\u5404\u79CD\u5168\u5C40\u7684\u4F18\u5316\u624B\u6BB5\u4F1A\u5728\u540E\u9762\u7684\u7AE0\u8282\u8BE6\u7EC6\u4ECB\u7ECD\u3002Server Compiler\u7F16\u8BD1\u4F18\u5316\u7684\u8FC7\u7A0B\u5982\u4E0B\u56FE\u6240\u793A\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/jit-f4d1b763-be02-4bb2-ab0e-45b1f0eb9550.png" alt=""></p><p><strong>Graal Compiler</strong></p><p>\u4ECEJDK 9\u5F00\u59CB\uFF0CHotspot VM\u4E2D\u96C6\u6210\u4E86\u4E00\u79CD\u65B0\u7684Server Compiler\uFF0CGraal\u7F16\u8BD1\u5668\u3002\u76F8\u6BD4C2\u7F16\u8BD1\u5668\uFF0CGraal\u6709\u8FD9\u6837\u51E0\u79CD\u5173\u952E\u7279\u6027\uFF1A</p><ul><li>\u524D\u6587\u6709\u63D0\u5230\uFF0CJVM\u4F1A\u5728\u89E3\u91CA\u6267\u884C\u7684\u65F6\u5019\u6536\u96C6\u7A0B\u5E8F\u8FD0\u884C\u7684\u5404\u79CD\u4FE1\u606F\uFF0C\u7136\u540E\u7F16\u8BD1\u5668\u4F1A\u6839\u636E\u8FD9\u4E9B\u4FE1\u606F\u8FDB\u884C\u4E00\u4E9B\u57FA\u4E8E\u9884\u6D4B\u7684\u6FC0\u8FDB\u4F18\u5316\uFF0C\u6BD4\u5982\u5206\u652F\u9884\u6D4B\uFF0C\u6839\u636E\u7A0B\u5E8F\u4E0D\u540C\u5206\u652F\u7684\u8FD0\u884C\u6982\u7387\uFF0C\u9009\u62E9\u6027\u5730\u7F16\u8BD1\u4E00\u4E9B\u6982\u7387\u8F83\u5927\u7684\u5206\u652F\u3002Graal\u6BD4C2\u66F4\u52A0\u9752\u7750\u8FD9\u79CD\u4F18\u5316\uFF0C\u6240\u4EE5Graal\u7684\u5CF0\u503C\u6027\u80FD\u901A\u5E38\u8981\u6BD4C2\u66F4\u597D\u3002</li><li>\u4F7F\u7528Java\u7F16\u5199\uFF0C\u5BF9\u4E8EJava\u8BED\u8A00\uFF0C\u5C24\u5176\u662F\u65B0\u7279\u6027\uFF0C\u6BD4\u5982Lambda\u3001Stream\u7B49\u66F4\u52A0\u53CB\u597D\u3002</li><li>\u66F4\u6DF1\u5C42\u6B21\u7684\u4F18\u5316\uFF0C\u6BD4\u5982\u865A\u51FD\u6570\u7684\u5185\u8054\u3001\u90E8\u5206\u9003\u9038\u5206\u6790\u7B49\u3002</li></ul><p>Graal\u7F16\u8BD1\u5668\u53EF\u4EE5\u901A\u8FC7Java\u865A\u62DF\u673A\u53C2\u6570-XX:+UnlockExperimentalVMOptions -XX:+UseJVMCICompiler\u542F\u7528\u3002\u5F53\u542F\u7528\u65F6\uFF0C\u5B83\u5C06\u66FF\u6362\u6389HotSpot\u4E2D\u7684C2\u7F16\u8BD1\u5668\uFF0C\u5E76\u54CD\u5E94\u539F\u672C\u7531C2\u8D1F\u8D23\u7684\u7F16\u8BD1\u8BF7\u6C42\u3002</p><h3 id="_2-\u5206\u5C42\u7F16\u8BD1" tabindex="-1"><a class="header-anchor" href="#_2-\u5206\u5C42\u7F16\u8BD1" aria-hidden="true">#</a> 2. \u5206\u5C42\u7F16\u8BD1</h3><p>\u5728Java 7\u4EE5\u524D\uFF0C\u9700\u8981\u7814\u53D1\u4EBA\u5458\u6839\u636E\u670D\u52A1\u7684\u6027\u8D28\u53BB\u9009\u62E9\u7F16\u8BD1\u5668\u3002\u5BF9\u4E8E\u9700\u8981\u5FEB\u901F\u542F\u52A8\u7684\uFF0C\u6216\u8005\u4E00\u4E9B\u4E0D\u4F1A\u957F\u671F\u8FD0\u884C\u7684\u670D\u52A1\uFF0C\u53EF\u4EE5\u91C7\u7528\u7F16\u8BD1\u6548\u7387\u8F83\u9AD8\u7684C1\uFF0C\u5BF9\u5E94\u53C2\u6570-client\u3002\u957F\u671F\u8FD0\u884C\u7684\u670D\u52A1\uFF0C\u6216\u8005\u5BF9\u5CF0\u503C\u6027\u80FD\u6709\u8981\u6C42\u7684\u540E\u53F0\u670D\u52A1\uFF0C\u53EF\u4EE5\u91C7\u7528\u5CF0\u503C\u6027\u80FD\u66F4\u597D\u7684C2\uFF0C\u5BF9\u5E94\u53C2\u6570-server\u3002Java 7\u5F00\u59CB\u5F15\u5165\u4E86\u5206\u5C42\u7F16\u8BD1\u7684\u6982\u5FF5\uFF0C\u5B83\u7ED3\u5408\u4E86C1\u548CC2\u7684\u4F18\u52BF\uFF0C\u8FFD\u6C42\u542F\u52A8\u901F\u5EA6\u548C\u5CF0\u503C\u6027\u80FD\u7684\u4E00\u4E2A\u5E73\u8861\u3002\u5206\u5C42\u7F16\u8BD1\u5C06JVM\u7684\u6267\u884C\u72B6\u6001\u5206\u4E3A\u4E86\u4E94\u4E2A\u5C42\u6B21\u3002\u4E94\u4E2A\u5C42\u7EA7\u5206\u522B\u662F\uFF1A</p><ol><li>\u89E3\u91CA\u6267\u884C\u3002</li><li>\u6267\u884C\u4E0D\u5E26profiling\u7684C1\u4EE3\u7801\u3002</li><li>\u6267\u884C\u4EC5\u5E26\u65B9\u6CD5\u8C03\u7528\u6B21\u6570\u4EE5\u53CA\u5FAA\u73AF\u56DE\u8FB9\u6267\u884C\u6B21\u6570profiling\u7684C1\u4EE3\u7801\u3002</li><li>\u6267\u884C\u5E26\u6240\u6709profiling\u7684C1\u4EE3\u7801\u3002</li><li>\u6267\u884CC2\u4EE3\u7801\u3002</li></ol><p>profiling\u5C31\u662F\u6536\u96C6\u80FD\u591F\u53CD\u6620\u7A0B\u5E8F\u6267\u884C\u72B6\u6001\u7684\u6570\u636E\u3002\u5176\u4E2D\u6700\u57FA\u672C\u7684\u7EDF\u8BA1\u6570\u636E\u5C31\u662F\u65B9\u6CD5\u7684\u8C03\u7528\u6B21\u6570\uFF0C\u4EE5\u53CA\u5FAA\u73AF\u56DE\u8FB9\u7684\u6267\u884C\u6B21\u6570\u3002</p><p>\u901A\u5E38\u60C5\u51B5\u4E0B\uFF0CC2\u4EE3\u7801\u7684\u6267\u884C\u6548\u7387\u8981\u6BD4C1\u4EE3\u7801\u7684\u9AD8\u51FA30%\u4EE5\u4E0A\u3002C1\u5C42\u6267\u884C\u7684\u4EE3\u7801\uFF0C\u6309\u6267\u884C\u6548\u7387\u6392\u5E8F\u4ECE\u9AD8\u81F3\u4F4E\u5219\u662F1\u5C42&gt;2\u5C42&gt;3\u5C42\u3002\u8FD95\u4E2A\u5C42\u6B21\u4E2D\uFF0C1\u5C42\u548C4\u5C42\u90FD\u662F\u7EC8\u6B62\u72B6\u6001\uFF0C\u5F53\u4E00\u4E2A\u65B9\u6CD5\u5230\u8FBE\u7EC8\u6B62\u72B6\u6001\u540E\uFF0C\u53EA\u8981\u7F16\u8BD1\u540E\u7684\u4EE3\u7801\u5E76\u6CA1\u6709\u5931\u6548\uFF0C\u90A3\u4E48JVM\u5C31\u4E0D\u4F1A\u518D\u6B21\u53D1\u51FA\u8BE5\u65B9\u6CD5\u7684\u7F16\u8BD1\u8BF7\u6C42\u7684\u3002\u670D\u52A1\u5B9E\u9645\u8FD0\u884C\u65F6\uFF0CJVM\u4F1A\u6839\u636E\u670D\u52A1\u8FD0\u884C\u60C5\u51B5\uFF0C\u4ECE\u89E3\u91CA\u6267\u884C\u5F00\u59CB\uFF0C\u9009\u62E9\u4E0D\u540C\u7684\u7F16\u8BD1\u8DEF\u5F84\uFF0C\u76F4\u5230\u5230\u8FBE\u7EC8\u6B62\u72B6\u6001\u3002\u4E0B\u56FE\u4E2D\u5C31\u5217\u4E3E\u4E86\u51E0\u79CD\u5E38\u89C1\u7684\u7F16\u8BD1\u8DEF\u5F84\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/jit-a6cebc82-ed4d-4b6d-892a-c5b245d227ab.png" alt=""></p><ul><li>\u56FE\u4E2D\u7B2C\u2460\u6761\u8DEF\u5F84\uFF0C\u4EE3\u8868\u7F16\u8BD1\u7684\u4E00\u822C\u60C5\u51B5\uFF0C\u70ED\u70B9\u65B9\u6CD5\u4ECE\u89E3\u91CA\u6267\u884C\u5230\u88AB3\u5C42\u7684C1\u7F16\u8BD1\uFF0C\u6700\u540E\u88AB4\u5C42\u7684C2\u7F16\u8BD1\u3002</li><li>\u5982\u679C\u65B9\u6CD5\u6BD4\u8F83\u5C0F\uFF08\u6BD4\u5982Java\u670D\u52A1\u4E2D\u5E38\u89C1\u7684getter/setter\u65B9\u6CD5\uFF09\uFF0C3\u5C42\u7684profiling\u6CA1\u6709\u6536\u96C6\u5230\u6709\u4EF7\u503C\u7684\u6570\u636E\uFF0CJVM\u5C31\u4F1A\u65AD\u5B9A\u8BE5\u65B9\u6CD5\u5BF9\u4E8EC1\u4EE3\u7801\u548CC2\u4EE3\u7801\u7684\u6267\u884C\u6548\u7387\u76F8\u540C\uFF0C\u5C31\u4F1A\u6267\u884C\u56FE\u4E2D\u7B2C\u2461\u6761\u8DEF\u5F84\u3002\u5728\u8FD9\u79CD\u60C5\u51B5\u4E0B\uFF0CJVM\u4F1A\u57283\u5C42\u7F16\u8BD1\u4E4B\u540E\uFF0C\u653E\u5F03\u8FDB\u5165C2\u7F16\u8BD1\uFF0C\u76F4\u63A5\u9009\u62E9\u75281\u5C42\u7684C1\u7F16\u8BD1\u8FD0\u884C\u3002</li><li>\u5728C1\u5FD9\u788C\u7684\u60C5\u51B5\u4E0B\uFF0C\u6267\u884C\u56FE\u4E2D\u7B2C\u2462\u6761\u8DEF\u5F84\uFF0C\u5728\u89E3\u91CA\u6267\u884C\u8FC7\u7A0B\u4E2D\u5BF9\u7A0B\u5E8F\u8FDB\u884Cprofiling \uFF0C\u6839\u636E\u4FE1\u606F\u76F4\u63A5\u7531\u7B2C4\u5C42\u7684C2\u7F16\u8BD1\u3002</li><li>\u524D\u6587\u63D0\u5230C1\u4E2D\u7684\u6267\u884C\u6548\u7387\u662F1\u5C42&gt;2\u5C42&gt;3\u5C42\uFF0C\u7B2C3\u5C42\u4E00\u822C\u8981\u6BD4\u7B2C2\u5C42\u616235%\u4EE5\u4E0A\uFF0C\u6240\u4EE5\u5728C2\u5FD9\u788C\u7684\u60C5\u51B5\u4E0B\uFF0C\u6267\u884C\u56FE\u4E2D\u7B2C\u2463\u6761\u8DEF\u5F84\u3002\u8FD9\u65F6\u65B9\u6CD5\u4F1A\u88AB2\u5C42\u7684C1\u7F16\u8BD1\uFF0C\u7136\u540E\u518D\u88AB3\u5C42\u7684C1\u7F16\u8BD1\uFF0C\u4EE5\u51CF\u5C11\u65B9\u6CD5\u57283\u5C42\u7684\u6267\u884C\u65F6\u95F4\u3002</li><li>\u5982\u679C\u7F16\u8BD1\u5668\u505A\u4E86\u4E00\u4E9B\u6BD4\u8F83\u6FC0\u8FDB\u7684\u4F18\u5316\uFF0C\u6BD4\u5982\u5206\u652F\u9884\u6D4B\uFF0C\u5728\u5B9E\u9645\u8FD0\u884C\u65F6\u53D1\u73B0\u9884\u6D4B\u51FA\u9519\uFF0C\u8FD9\u65F6\u5C31\u4F1A\u8FDB\u884C\u53CD\u4F18\u5316\uFF0C\u91CD\u65B0\u8FDB\u5165\u89E3\u91CA\u6267\u884C\uFF0C\u56FE\u4E2D\u7B2C\u2464\u6761\u6267\u884C\u8DEF\u5F84\u4EE3\u8868\u7684\u5C31\u662F\u53CD\u4F18\u5316\u3002</li></ul><p>\u603B\u7684\u6765\u8BF4\uFF0CC1\u7684\u7F16\u8BD1\u901F\u5EA6\u66F4\u5FEB\uFF0CC2\u7684\u7F16\u8BD1\u8D28\u91CF\u66F4\u9AD8\uFF0C\u5206\u5C42\u7F16\u8BD1\u7684\u4E0D\u540C\u7F16\u8BD1\u8DEF\u5F84\uFF0C\u4E5F\u5C31\u662FJVM\u6839\u636E\u5F53\u524D\u670D\u52A1\u7684\u8FD0\u884C\u60C5\u51B5\u6765\u5BFB\u627E\u5F53\u524D\u670D\u52A1\u7684\u6700\u4F73\u5E73\u8861\u70B9\u7684\u4E00\u4E2A\u8FC7\u7A0B\u3002\u4ECEJDK 8\u5F00\u59CB\uFF0CJVM\u9ED8\u8BA4\u5F00\u542F\u5206\u5C42\u7F16\u8BD1\u3002</p><h3 id="_3-\u5373\u65F6\u7F16\u8BD1\u7684\u89E6\u53D1" tabindex="-1"><a class="header-anchor" href="#_3-\u5373\u65F6\u7F16\u8BD1\u7684\u89E6\u53D1" aria-hidden="true">#</a> 3. \u5373\u65F6\u7F16\u8BD1\u7684\u89E6\u53D1</h3><p>Java\u865A\u62DF\u673A\u6839\u636E\u65B9\u6CD5\u7684\u8C03\u7528\u6B21\u6570\u4EE5\u53CA\u5FAA\u73AF\u56DE\u8FB9\u7684\u6267\u884C\u6B21\u6570\u6765\u89E6\u53D1\u5373\u65F6\u7F16\u8BD1\u3002\u5FAA\u73AF\u56DE\u8FB9\u662F\u4E00\u4E2A\u63A7\u5236\u6D41\u56FE\u4E2D\u7684\u6982\u5FF5\uFF0C\u7A0B\u5E8F\u4E2D\u53EF\u4EE5\u7B80\u5355\u7406\u89E3\u4E3A\u5F80\u56DE\u8DF3\u8F6C\u7684\u6307\u4EE4\uFF0C\u6BD4\u5982\u4E0B\u9762\u8FD9\u6BB5\u4EE3\u7801\uFF1A</p><p>\u5FAA\u73AF\u56DE\u8FB9</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">nlp</span><span class="token punctuation">(</span><span class="token class-name">Object</span> obj<span class="token punctuation">)</span> <span class="token punctuation">{</span>
+import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e}from"./app.615e41d8.js";const p={},t=e(`<h1 id="java\u5373\u65F6\u7F16\u8BD1-jit-\u5668\u539F\u7406\u89E3\u6790\u53CA\u5B9E\u8DF5" tabindex="-1"><a class="header-anchor" href="#java\u5373\u65F6\u7F16\u8BD1-jit-\u5668\u539F\u7406\u89E3\u6790\u53CA\u5B9E\u8DF5" aria-hidden="true">#</a> Java\u5373\u65F6\u7F16\u8BD1\uFF08JIT\uFF09\u5668\u539F\u7406\u89E3\u6790\u53CA\u5B9E\u8DF5</h1><h2 id="\u4E00\u3001\u5BFC\u8BFB" tabindex="-1"><a class="header-anchor" href="#\u4E00\u3001\u5BFC\u8BFB" aria-hidden="true">#</a> \u4E00\u3001\u5BFC\u8BFB</h2><p>\u5E38\u89C1\u7684\u7F16\u8BD1\u578B\u8BED\u8A00\u5982C++\uFF0C\u901A\u5E38\u4F1A\u628A\u4EE3\u7801\u76F4\u63A5\u7F16\u8BD1\u6210CPU\u6240\u80FD\u7406\u89E3\u7684\u673A\u5668\u7801\u6765\u8FD0\u884C\u3002\u800CJava\u4E3A\u4E86\u5B9E\u73B0\u201C\u4E00\u6B21\u7F16\u8BD1\uFF0C\u5904\u5904\u8FD0\u884C\u201D\u7684\u7279\u6027\uFF0C\u628A\u7F16\u8BD1\u7684\u8FC7\u7A0B\u5206\u6210\u4E24\u90E8\u5206\uFF0C\u9996\u5148\u5B83\u4F1A\u5148\u7531javac\u7F16\u8BD1\u6210\u901A\u7528\u7684\u4E2D\u95F4\u5F62\u5F0F\u2014\u2014\u5B57\u8282\u7801\uFF0C\u7136\u540E\u518D\u7531\u89E3\u91CA\u5668\u9010\u6761\u5C06\u5B57\u8282\u7801\u89E3\u91CA\u4E3A\u673A\u5668\u7801\u6765\u6267\u884C\u3002\u6240\u4EE5\u5728\u6027\u80FD\u4E0A\uFF0CJava\u901A\u5E38\u4E0D\u5982C++\u8FD9\u7C7B\u7F16\u8BD1\u578B\u8BED\u8A00\u3002</p><p>\u4E3A\u4E86\u4F18\u5316Java\u7684\u6027\u80FD \uFF0CJVM\u5728\u89E3\u91CA\u5668\u4E4B\u5916\u5F15\u5165\u4E86\u5373\u65F6\uFF08Just In Time\uFF09\u7F16\u8BD1\u5668\uFF1A\u5F53\u7A0B\u5E8F\u8FD0\u884C\u65F6\uFF0C\u89E3\u91CA\u5668\u9996\u5148\u53D1\u6325\u4F5C\u7528\uFF0C\u4EE3\u7801\u53EF\u4EE5\u76F4\u63A5\u6267\u884C\u3002\u968F\u7740\u65F6\u95F4\u63A8\u79FB\uFF0C\u5373\u65F6\u7F16\u8BD1\u5668\u9010\u6E10\u53D1\u6325\u4F5C\u7528\uFF0C\u628A\u8D8A\u6765\u8D8A\u591A\u7684\u4EE3\u7801\u7F16\u8BD1\u4F18\u5316\u6210\u672C\u5730\u4EE3\u7801\uFF0C\u6765\u83B7\u53D6\u66F4\u9AD8\u7684\u6267\u884C\u6548\u7387\u3002\u89E3\u91CA\u5668\u8FD9\u65F6\u53EF\u4EE5\u4F5C\u4E3A\u7F16\u8BD1\u8FD0\u884C\u7684\u964D\u7EA7\u624B\u6BB5\uFF0C\u5728\u4E00\u4E9B\u4E0D\u53EF\u9760\u7684\u7F16\u8BD1\u4F18\u5316\u51FA\u73B0\u95EE\u9898\u65F6\uFF0C\u518D\u5207\u6362\u56DE\u89E3\u91CA\u6267\u884C\uFF0C\u4FDD\u8BC1\u7A0B\u5E8F\u53EF\u4EE5\u6B63\u5E38\u8FD0\u884C\u3002</p><p>\u5373\u65F6\u7F16\u8BD1\u5668\u6781\u5927\u5730\u63D0\u9AD8\u4E86Java\u7A0B\u5E8F\u7684\u8FD0\u884C\u901F\u5EA6\uFF0C\u800C\u4E14\u8DDF\u9759\u6001\u7F16\u8BD1\u76F8\u6BD4\uFF0C\u5373\u65F6\u7F16\u8BD1\u5668\u53EF\u4EE5\u9009\u62E9\u6027\u5730\u7F16\u8BD1\u70ED\u70B9\u4EE3\u7801\uFF0C\u7701\u53BB\u4E86\u5F88\u591A\u7F16\u8BD1\u65F6\u95F4\uFF0C\u4E5F\u8282\u7701\u5F88\u591A\u7684\u7A7A\u95F4\u3002\u76EE\u524D\uFF0C\u5373\u65F6\u7F16\u8BD1\u5668\u5DF2\u7ECF\u975E\u5E38\u6210\u719F\u4E86\uFF0C\u5728\u6027\u80FD\u5C42\u9762\u751A\u81F3\u53EF\u4EE5\u548C\u7F16\u8BD1\u578B\u8BED\u8A00\u76F8\u6BD4\u3002\u4E0D\u8FC7\u5728\u8FD9\u4E2A\u9886\u57DF\uFF0C\u5927\u5BB6\u4F9D\u7136\u5728\u4E0D\u65AD\u63A2\u7D22\u5982\u4F55\u7ED3\u5408\u4E0D\u540C\u7684\u7F16\u8BD1\u65B9\u5F0F\uFF0C\u4F7F\u7528\u66F4\u52A0\u667A\u80FD\u7684\u624B\u6BB5\u6765\u63D0\u5347\u7A0B\u5E8F\u7684\u8FD0\u884C\u901F\u5EA6\u3002</p><h2 id="\u4E8C\u3001java\u7684\u6267\u884C\u8FC7\u7A0B" tabindex="-1"><a class="header-anchor" href="#\u4E8C\u3001java\u7684\u6267\u884C\u8FC7\u7A0B" aria-hidden="true">#</a> \u4E8C\u3001Java\u7684\u6267\u884C\u8FC7\u7A0B</h2><p>Java\u7684\u6267\u884C\u8FC7\u7A0B\u6574\u4F53\u53EF\u4EE5\u5206\u4E3A\u4E24\u4E2A\u90E8\u5206\uFF0C\u7B2C\u4E00\u6B65\u7531javac\u5C06\u6E90\u7801\u7F16\u8BD1\u6210\u5B57\u8282\u7801\uFF0C\u5728\u8FD9\u4E2A\u8FC7\u7A0B\u4E2D\u4F1A\u8FDB\u884C\u8BCD\u6CD5\u5206\u6790\u3001\u8BED\u6CD5\u5206\u6790\u3001\u8BED\u4E49\u5206\u6790\uFF0C\u7F16\u8BD1\u539F\u7406\u4E2D\u8FD9\u90E8\u5206\u7684\u7F16\u8BD1\u79F0\u4E3A\u524D\u7AEF\u7F16\u8BD1\u3002\u63A5\u4E0B\u6765\u65E0\u9700\u7F16\u8BD1\u76F4\u63A5\u9010\u6761\u5C06\u5B57\u8282\u7801\u89E3\u91CA\u6267\u884C\uFF0C\u5728\u89E3\u91CA\u6267\u884C\u7684\u8FC7\u7A0B\u4E2D\uFF0C\u865A\u62DF\u673A\u540C\u65F6\u5BF9\u7A0B\u5E8F\u8FD0\u884C\u7684\u4FE1\u606F\u8FDB\u884C\u6536\u96C6\uFF0C\u5728\u8FD9\u4E9B\u4FE1\u606F\u7684\u57FA\u7840\u4E0A\uFF0C\u7F16\u8BD1\u5668\u4F1A\u9010\u6E10\u53D1\u6325\u4F5C\u7528\uFF0C\u5B83\u4F1A\u8FDB\u884C\u540E\u7AEF\u7F16\u8BD1\u2014\u2014\u628A\u5B57\u8282\u7801\u7F16\u8BD1\u6210\u673A\u5668\u7801\uFF0C\u4F46\u4E0D\u662F\u6240\u6709\u7684\u4EE3\u7801\u90FD\u4F1A\u88AB\u7F16\u8BD1\uFF0C\u53EA\u6709\u88ABJVM\u8BA4\u5B9A\u4E3A\u7684\u70ED\u70B9\u4EE3\u7801\uFF0C\u624D\u53EF\u80FD\u88AB\u7F16\u8BD1\u3002</p><p>\u600E\u4E48\u6837\u624D\u4F1A\u88AB\u8BA4\u4E3A\u662F\u70ED\u70B9\u4EE3\u7801\u5462\uFF1FJVM\u4E2D\u4F1A\u8BBE\u7F6E\u4E00\u4E2A\u9608\u503C\uFF0C\u5F53\u65B9\u6CD5\u6216\u8005\u4EE3\u7801\u5757\u7684\u5728\u4E00\u5B9A\u65F6\u95F4\u5185\u7684\u8C03\u7528\u6B21\u6570\u8D85\u8FC7\u8FD9\u4E2A\u9608\u503C\u65F6\u5C31\u4F1A\u88AB\u7F16\u8BD1\uFF0C\u5B58\u5165codeCache\u4E2D\u3002\u5F53\u4E0B\u6B21\u6267\u884C\u65F6\uFF0C\u518D\u9047\u5230\u8FD9\u6BB5\u4EE3\u7801\uFF0C\u5C31\u4F1A\u4ECEcodeCache\u4E2D\u8BFB\u53D6\u673A\u5668\u7801\uFF0C\u76F4\u63A5\u6267\u884C\uFF0C\u4EE5\u6B64\u6765\u63D0\u5347\u7A0B\u5E8F\u8FD0\u884C\u7684\u6027\u80FD\u3002\u6574\u4F53\u7684\u6267\u884C\u8FC7\u7A0B\u5927\u81F4\u5982\u4E0B\u56FE\u6240\u793A\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/jit-9a62fc02-1a6a-451e-bb2b-19fc086d5be0.png" alt=""></p><h3 id="_1-jvm\u4E2D\u7684\u7F16\u8BD1\u5668" tabindex="-1"><a class="header-anchor" href="#_1-jvm\u4E2D\u7684\u7F16\u8BD1\u5668" aria-hidden="true">#</a> 1. JVM\u4E2D\u7684\u7F16\u8BD1\u5668</h3><p>JVM\u4E2D\u96C6\u6210\u4E86\u4E24\u79CD\u7F16\u8BD1\u5668\uFF0CClient Compiler\u548CServer Compiler\uFF0C\u5B83\u4EEC\u7684\u4F5C\u7528\u4E5F\u4E0D\u540C\u3002Client Compiler\u6CE8\u91CD\u542F\u52A8\u901F\u5EA6\u548C\u5C40\u90E8\u7684\u4F18\u5316\uFF0CServer Compiler\u5219\u66F4\u52A0\u5173\u6CE8\u5168\u5C40\u7684\u4F18\u5316\uFF0C\u6027\u80FD\u4F1A\u66F4\u597D\uFF0C\u4F46\u7531\u4E8E\u4F1A\u8FDB\u884C\u66F4\u591A\u7684\u5168\u5C40\u5206\u6790\uFF0C\u6240\u4EE5\u542F\u52A8\u901F\u5EA6\u4F1A\u53D8\u6162\u3002\u4E24\u79CD\u7F16\u8BD1\u5668\u6709\u7740\u4E0D\u540C\u7684\u5E94\u7528\u573A\u666F\uFF0C\u5728\u865A\u62DF\u673A\u4E2D\u540C\u65F6\u53D1\u6325\u4F5C\u7528\u3002</p><p><strong>Client Compiler</strong></p><p>HotSpot VM\u5E26\u6709\u4E00\u4E2AClient Compiler C1\u7F16\u8BD1\u5668\u3002\u8FD9\u79CD\u7F16\u8BD1\u5668\u542F\u52A8\u901F\u5EA6\u5FEB\uFF0C\u4F46\u662F\u6027\u80FD\u6BD4\u8F83Server Compiler\u6765\u8BF4\u4F1A\u5DEE\u4E00\u4E9B\u3002C1\u4F1A\u505A\u4E09\u4EF6\u4E8B\uFF1A</p><ul><li>\u5C40\u90E8\u7B80\u5355\u53EF\u9760\u7684\u4F18\u5316\uFF0C\u6BD4\u5982\u5B57\u8282\u7801\u4E0A\u8FDB\u884C\u7684\u4E00\u4E9B\u57FA\u7840\u4F18\u5316\uFF0C\u65B9\u6CD5\u5185\u8054\u3001\u5E38\u91CF\u4F20\u64AD\u7B49\uFF0C\u653E\u5F03\u8BB8\u591A\u8017\u65F6\u8F83\u957F\u7684\u5168\u5C40\u4F18\u5316\u3002</li><li>\u5C06\u5B57\u8282\u7801\u6784\u9020\u6210\u9AD8\u7EA7\u4E2D\u95F4\u8868\u793A\uFF08High-level Intermediate Representation\uFF0C\u4EE5\u4E0B\u79F0\u4E3AHIR\uFF09\uFF0CHIR\u4E0E\u5E73\u53F0\u65E0\u5173\uFF0C\u901A\u5E38\u91C7\u7528\u56FE\u7ED3\u6784\uFF0C\u66F4\u9002\u5408JVM\u5BF9\u7A0B\u5E8F\u8FDB\u884C\u4F18\u5316\u3002</li><li>\u6700\u540E\u5C06HIR\u8F6C\u6362\u6210\u4F4E\u7EA7\u4E2D\u95F4\u8868\u793A\uFF08Low-level Intermediate Representation\uFF0C\u4EE5\u4E0B\u79F0\u4E3ALIR\uFF09\uFF0C\u5728LIR\u7684\u57FA\u7840\u4E0A\u4F1A\u8FDB\u884C\u5BC4\u5B58\u5668\u5206\u914D\u3001\u7AA5\u5B54\u4F18\u5316\uFF08\u5C40\u90E8\u7684\u4F18\u5316\u65B9\u5F0F\uFF0C\u7F16\u8BD1\u5668\u5728\u4E00\u4E2A\u57FA\u672C\u5757\u6216\u8005\u591A\u4E2A\u57FA\u672C\u5757\u4E2D\uFF0C\u9488\u5BF9\u5DF2\u7ECF\u751F\u6210\u7684\u4EE3\u7801\uFF0C\u7ED3\u5408CPU\u81EA\u5DF1\u6307\u4EE4\u7684\u7279\u70B9\uFF0C\u901A\u8FC7\u4E00\u4E9B\u8BA4\u4E3A\u53EF\u80FD\u5E26\u6765\u6027\u80FD\u63D0\u5347\u7684\u8F6C\u6362\u89C4\u5219\u6216\u8005\u901A\u8FC7\u6574\u4F53\u7684\u5206\u6790\uFF0C\u8FDB\u884C\u6307\u4EE4\u8F6C\u6362\uFF0C\u6765\u63D0\u5347\u4EE3\u7801\u6027\u80FD\uFF09\u7B49\u64CD\u4F5C\uFF0C\u6700\u7EC8\u751F\u6210\u673A\u5668\u7801\u3002</li></ul><p><strong>Server Compiler</strong></p><p>Server Compiler\u4E3B\u8981\u5173\u6CE8\u4E00\u4E9B\u7F16\u8BD1\u8017\u65F6\u8F83\u957F\u7684\u5168\u5C40\u4F18\u5316\uFF0C\u751A\u81F3\u4F1A\u8FD8\u4F1A\u6839\u636E\u7A0B\u5E8F\u8FD0\u884C\u7684\u4FE1\u606F\u8FDB\u884C\u4E00\u4E9B\u4E0D\u53EF\u9760\u7684\u6FC0\u8FDB\u4F18\u5316\u3002\u8FD9\u79CD\u7F16\u8BD1\u5668\u7684\u542F\u52A8\u65F6\u95F4\u957F\uFF0C\u9002\u7528\u4E8E\u957F\u65F6\u95F4\u8FD0\u884C\u7684\u540E\u53F0\u7A0B\u5E8F\uFF0C\u5B83\u7684\u6027\u80FD\u901A\u5E38\u6BD4Client Compiler\u9AD830%\u4EE5\u4E0A\u3002\u76EE\u524D\uFF0CHotspot\u865A\u62DF\u673A\u4E2D\u4F7F\u7528\u7684Server Compiler\u6709\u4E24\u79CD\uFF1AC2\u548CGraal\u3002</p><p><strong>C2 Compiler</strong></p><p>\u5728Hotspot VM\u4E2D\uFF0C\u9ED8\u8BA4\u7684Server Compiler\u662FC2\u7F16\u8BD1\u5668\u3002</p><p>C2\u7F16\u8BD1\u5668\u5728\u8FDB\u884C\u7F16\u8BD1\u4F18\u5316\u65F6\uFF0C\u4F1A\u4F7F\u7528\u4E00\u79CD\u63A7\u5236\u6D41\u4E0E\u6570\u636E\u6D41\u7ED3\u5408\u7684\u56FE\u6570\u636E\u7ED3\u6784\uFF0C\u79F0\u4E3AIdeal Graph\u3002 Ideal Graph\u8868\u793A\u5F53\u524D\u7A0B\u5E8F\u7684\u6570\u636E\u6D41\u5411\u548C\u6307\u4EE4\u95F4\u7684\u4F9D\u8D56\u5173\u7CFB\uFF0C\u4F9D\u9760\u8FD9\u79CD\u56FE\u7ED3\u6784\uFF0C\u67D0\u4E9B\u4F18\u5316\u6B65\u9AA4\uFF08\u5C24\u5176\u662F\u6D89\u53CA\u6D6E\u52A8\u4EE3\u7801\u5757\u7684\u90A3\u4E9B\u4F18\u5316\u6B65\u9AA4\uFF09\u53D8\u5F97\u4E0D\u90A3\u4E48\u590D\u6742\u3002</p><p>Ideal Graph\u7684\u6784\u5EFA\u662F\u5728\u89E3\u6790\u5B57\u8282\u7801\u7684\u65F6\u5019\uFF0C\u6839\u636E\u5B57\u8282\u7801\u4E2D\u7684\u6307\u4EE4\u5411\u4E00\u4E2A\u7A7A\u7684Graph\u4E2D\u6DFB\u52A0\u8282\u70B9\uFF0CGraph\u4E2D\u7684\u8282\u70B9\u901A\u5E38\u5BF9\u5E94\u4E00\u4E2A\u6307\u4EE4\u5757\uFF0C\u6BCF\u4E2A\u6307\u4EE4\u5757\u5305\u542B\u591A\u6761\u76F8\u5173\u8054\u7684\u6307\u4EE4\uFF0CJVM\u4F1A\u5229\u7528\u4E00\u4E9B\u4F18\u5316\u6280\u672F\u5BF9\u8FD9\u4E9B\u6307\u4EE4\u8FDB\u884C\u4F18\u5316\uFF0C\u6BD4\u5982Global Value Numbering\u3001\u5E38\u91CF\u6298\u53E0\u7B49\uFF0C\u89E3\u6790\u7ED3\u675F\u540E\uFF0C\u8FD8\u4F1A\u8FDB\u884C\u4E00\u4E9B\u6B7B\u4EE3\u7801\u5254\u9664\u7684\u64CD\u4F5C\u3002\u751F\u6210Ideal Graph\u540E\uFF0C\u4F1A\u5728\u8FD9\u4E2A\u57FA\u7840\u4E0A\u7ED3\u5408\u6536\u96C6\u7684\u7A0B\u5E8F\u8FD0\u884C\u4FE1\u606F\u6765\u8FDB\u884C\u4E00\u4E9B\u5168\u5C40\u7684\u4F18\u5316\uFF0C\u8FD9\u4E2A\u9636\u6BB5\u5982\u679CJVM\u5224\u65AD\u6B64\u65F6\u6CA1\u6709\u5168\u5C40\u4F18\u5316\u7684\u5FC5\u8981\uFF0C\u5C31\u4F1A\u8DF3\u8FC7\u8FD9\u90E8\u5206\u4F18\u5316\u3002</p><p>\u65E0\u8BBA\u662F\u5426\u8FDB\u884C\u5168\u5C40\u4F18\u5316\uFF0CIdeal Graph\u90FD\u4F1A\u88AB\u8F6C\u5316\u4E3A\u4E00\u79CD\u66F4\u63A5\u8FD1\u673A\u5668\u5C42\u9762\u7684MachNode Graph\uFF0C\u6700\u540E\u7F16\u8BD1\u7684\u673A\u5668\u7801\u5C31\u662F\u4ECEMachNode Graph\u4E2D\u5F97\u7684\uFF0C\u751F\u6210\u673A\u5668\u7801\u524D\u8FD8\u4F1A\u6709\u4E00\u4E9B\u5305\u62EC\u5BC4\u5B58\u5668\u5206\u914D\u3001\u7AA5\u5B54\u4F18\u5316\u7B49\u64CD\u4F5C\u3002\u5173\u4E8EIdeal Graph\u548C\u5404\u79CD\u5168\u5C40\u7684\u4F18\u5316\u624B\u6BB5\u4F1A\u5728\u540E\u9762\u7684\u7AE0\u8282\u8BE6\u7EC6\u4ECB\u7ECD\u3002Server Compiler\u7F16\u8BD1\u4F18\u5316\u7684\u8FC7\u7A0B\u5982\u4E0B\u56FE\u6240\u793A\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/jit-f4d1b763-be02-4bb2-ab0e-45b1f0eb9550.png" alt=""></p><p><strong>Graal Compiler</strong></p><p>\u4ECEJDK 9\u5F00\u59CB\uFF0CHotspot VM\u4E2D\u96C6\u6210\u4E86\u4E00\u79CD\u65B0\u7684Server Compiler\uFF0CGraal\u7F16\u8BD1\u5668\u3002\u76F8\u6BD4C2\u7F16\u8BD1\u5668\uFF0CGraal\u6709\u8FD9\u6837\u51E0\u79CD\u5173\u952E\u7279\u6027\uFF1A</p><ul><li>\u524D\u6587\u6709\u63D0\u5230\uFF0CJVM\u4F1A\u5728\u89E3\u91CA\u6267\u884C\u7684\u65F6\u5019\u6536\u96C6\u7A0B\u5E8F\u8FD0\u884C\u7684\u5404\u79CD\u4FE1\u606F\uFF0C\u7136\u540E\u7F16\u8BD1\u5668\u4F1A\u6839\u636E\u8FD9\u4E9B\u4FE1\u606F\u8FDB\u884C\u4E00\u4E9B\u57FA\u4E8E\u9884\u6D4B\u7684\u6FC0\u8FDB\u4F18\u5316\uFF0C\u6BD4\u5982\u5206\u652F\u9884\u6D4B\uFF0C\u6839\u636E\u7A0B\u5E8F\u4E0D\u540C\u5206\u652F\u7684\u8FD0\u884C\u6982\u7387\uFF0C\u9009\u62E9\u6027\u5730\u7F16\u8BD1\u4E00\u4E9B\u6982\u7387\u8F83\u5927\u7684\u5206\u652F\u3002Graal\u6BD4C2\u66F4\u52A0\u9752\u7750\u8FD9\u79CD\u4F18\u5316\uFF0C\u6240\u4EE5Graal\u7684\u5CF0\u503C\u6027\u80FD\u901A\u5E38\u8981\u6BD4C2\u66F4\u597D\u3002</li><li>\u4F7F\u7528Java\u7F16\u5199\uFF0C\u5BF9\u4E8EJava\u8BED\u8A00\uFF0C\u5C24\u5176\u662F\u65B0\u7279\u6027\uFF0C\u6BD4\u5982Lambda\u3001Stream\u7B49\u66F4\u52A0\u53CB\u597D\u3002</li><li>\u66F4\u6DF1\u5C42\u6B21\u7684\u4F18\u5316\uFF0C\u6BD4\u5982\u865A\u51FD\u6570\u7684\u5185\u8054\u3001\u90E8\u5206\u9003\u9038\u5206\u6790\u7B49\u3002</li></ul><p>Graal\u7F16\u8BD1\u5668\u53EF\u4EE5\u901A\u8FC7Java\u865A\u62DF\u673A\u53C2\u6570-XX:+UnlockExperimentalVMOptions -XX:+UseJVMCICompiler\u542F\u7528\u3002\u5F53\u542F\u7528\u65F6\uFF0C\u5B83\u5C06\u66FF\u6362\u6389HotSpot\u4E2D\u7684C2\u7F16\u8BD1\u5668\uFF0C\u5E76\u54CD\u5E94\u539F\u672C\u7531C2\u8D1F\u8D23\u7684\u7F16\u8BD1\u8BF7\u6C42\u3002</p><h3 id="_2-\u5206\u5C42\u7F16\u8BD1" tabindex="-1"><a class="header-anchor" href="#_2-\u5206\u5C42\u7F16\u8BD1" aria-hidden="true">#</a> 2. \u5206\u5C42\u7F16\u8BD1</h3><p>\u5728Java 7\u4EE5\u524D\uFF0C\u9700\u8981\u7814\u53D1\u4EBA\u5458\u6839\u636E\u670D\u52A1\u7684\u6027\u8D28\u53BB\u9009\u62E9\u7F16\u8BD1\u5668\u3002\u5BF9\u4E8E\u9700\u8981\u5FEB\u901F\u542F\u52A8\u7684\uFF0C\u6216\u8005\u4E00\u4E9B\u4E0D\u4F1A\u957F\u671F\u8FD0\u884C\u7684\u670D\u52A1\uFF0C\u53EF\u4EE5\u91C7\u7528\u7F16\u8BD1\u6548\u7387\u8F83\u9AD8\u7684C1\uFF0C\u5BF9\u5E94\u53C2\u6570-client\u3002\u957F\u671F\u8FD0\u884C\u7684\u670D\u52A1\uFF0C\u6216\u8005\u5BF9\u5CF0\u503C\u6027\u80FD\u6709\u8981\u6C42\u7684\u540E\u53F0\u670D\u52A1\uFF0C\u53EF\u4EE5\u91C7\u7528\u5CF0\u503C\u6027\u80FD\u66F4\u597D\u7684C2\uFF0C\u5BF9\u5E94\u53C2\u6570-server\u3002Java 7\u5F00\u59CB\u5F15\u5165\u4E86\u5206\u5C42\u7F16\u8BD1\u7684\u6982\u5FF5\uFF0C\u5B83\u7ED3\u5408\u4E86C1\u548CC2\u7684\u4F18\u52BF\uFF0C\u8FFD\u6C42\u542F\u52A8\u901F\u5EA6\u548C\u5CF0\u503C\u6027\u80FD\u7684\u4E00\u4E2A\u5E73\u8861\u3002\u5206\u5C42\u7F16\u8BD1\u5C06JVM\u7684\u6267\u884C\u72B6\u6001\u5206\u4E3A\u4E86\u4E94\u4E2A\u5C42\u6B21\u3002\u4E94\u4E2A\u5C42\u7EA7\u5206\u522B\u662F\uFF1A</p><ol><li>\u89E3\u91CA\u6267\u884C\u3002</li><li>\u6267\u884C\u4E0D\u5E26profiling\u7684C1\u4EE3\u7801\u3002</li><li>\u6267\u884C\u4EC5\u5E26\u65B9\u6CD5\u8C03\u7528\u6B21\u6570\u4EE5\u53CA\u5FAA\u73AF\u56DE\u8FB9\u6267\u884C\u6B21\u6570profiling\u7684C1\u4EE3\u7801\u3002</li><li>\u6267\u884C\u5E26\u6240\u6709profiling\u7684C1\u4EE3\u7801\u3002</li><li>\u6267\u884CC2\u4EE3\u7801\u3002</li></ol><p>profiling\u5C31\u662F\u6536\u96C6\u80FD\u591F\u53CD\u6620\u7A0B\u5E8F\u6267\u884C\u72B6\u6001\u7684\u6570\u636E\u3002\u5176\u4E2D\u6700\u57FA\u672C\u7684\u7EDF\u8BA1\u6570\u636E\u5C31\u662F\u65B9\u6CD5\u7684\u8C03\u7528\u6B21\u6570\uFF0C\u4EE5\u53CA\u5FAA\u73AF\u56DE\u8FB9\u7684\u6267\u884C\u6B21\u6570\u3002</p><p>\u901A\u5E38\u60C5\u51B5\u4E0B\uFF0CC2\u4EE3\u7801\u7684\u6267\u884C\u6548\u7387\u8981\u6BD4C1\u4EE3\u7801\u7684\u9AD8\u51FA30%\u4EE5\u4E0A\u3002C1\u5C42\u6267\u884C\u7684\u4EE3\u7801\uFF0C\u6309\u6267\u884C\u6548\u7387\u6392\u5E8F\u4ECE\u9AD8\u81F3\u4F4E\u5219\u662F1\u5C42&gt;2\u5C42&gt;3\u5C42\u3002\u8FD95\u4E2A\u5C42\u6B21\u4E2D\uFF0C1\u5C42\u548C4\u5C42\u90FD\u662F\u7EC8\u6B62\u72B6\u6001\uFF0C\u5F53\u4E00\u4E2A\u65B9\u6CD5\u5230\u8FBE\u7EC8\u6B62\u72B6\u6001\u540E\uFF0C\u53EA\u8981\u7F16\u8BD1\u540E\u7684\u4EE3\u7801\u5E76\u6CA1\u6709\u5931\u6548\uFF0C\u90A3\u4E48JVM\u5C31\u4E0D\u4F1A\u518D\u6B21\u53D1\u51FA\u8BE5\u65B9\u6CD5\u7684\u7F16\u8BD1\u8BF7\u6C42\u7684\u3002\u670D\u52A1\u5B9E\u9645\u8FD0\u884C\u65F6\uFF0CJVM\u4F1A\u6839\u636E\u670D\u52A1\u8FD0\u884C\u60C5\u51B5\uFF0C\u4ECE\u89E3\u91CA\u6267\u884C\u5F00\u59CB\uFF0C\u9009\u62E9\u4E0D\u540C\u7684\u7F16\u8BD1\u8DEF\u5F84\uFF0C\u76F4\u5230\u5230\u8FBE\u7EC8\u6B62\u72B6\u6001\u3002\u4E0B\u56FE\u4E2D\u5C31\u5217\u4E3E\u4E86\u51E0\u79CD\u5E38\u89C1\u7684\u7F16\u8BD1\u8DEF\u5F84\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/jit-a6cebc82-ed4d-4b6d-892a-c5b245d227ab.png" alt=""></p><ul><li>\u56FE\u4E2D\u7B2C\u2460\u6761\u8DEF\u5F84\uFF0C\u4EE3\u8868\u7F16\u8BD1\u7684\u4E00\u822C\u60C5\u51B5\uFF0C\u70ED\u70B9\u65B9\u6CD5\u4ECE\u89E3\u91CA\u6267\u884C\u5230\u88AB3\u5C42\u7684C1\u7F16\u8BD1\uFF0C\u6700\u540E\u88AB4\u5C42\u7684C2\u7F16\u8BD1\u3002</li><li>\u5982\u679C\u65B9\u6CD5\u6BD4\u8F83\u5C0F\uFF08\u6BD4\u5982Java\u670D\u52A1\u4E2D\u5E38\u89C1\u7684getter/setter\u65B9\u6CD5\uFF09\uFF0C3\u5C42\u7684profiling\u6CA1\u6709\u6536\u96C6\u5230\u6709\u4EF7\u503C\u7684\u6570\u636E\uFF0CJVM\u5C31\u4F1A\u65AD\u5B9A\u8BE5\u65B9\u6CD5\u5BF9\u4E8EC1\u4EE3\u7801\u548CC2\u4EE3\u7801\u7684\u6267\u884C\u6548\u7387\u76F8\u540C\uFF0C\u5C31\u4F1A\u6267\u884C\u56FE\u4E2D\u7B2C\u2461\u6761\u8DEF\u5F84\u3002\u5728\u8FD9\u79CD\u60C5\u51B5\u4E0B\uFF0CJVM\u4F1A\u57283\u5C42\u7F16\u8BD1\u4E4B\u540E\uFF0C\u653E\u5F03\u8FDB\u5165C2\u7F16\u8BD1\uFF0C\u76F4\u63A5\u9009\u62E9\u75281\u5C42\u7684C1\u7F16\u8BD1\u8FD0\u884C\u3002</li><li>\u5728C1\u5FD9\u788C\u7684\u60C5\u51B5\u4E0B\uFF0C\u6267\u884C\u56FE\u4E2D\u7B2C\u2462\u6761\u8DEF\u5F84\uFF0C\u5728\u89E3\u91CA\u6267\u884C\u8FC7\u7A0B\u4E2D\u5BF9\u7A0B\u5E8F\u8FDB\u884Cprofiling \uFF0C\u6839\u636E\u4FE1\u606F\u76F4\u63A5\u7531\u7B2C4\u5C42\u7684C2\u7F16\u8BD1\u3002</li><li>\u524D\u6587\u63D0\u5230C1\u4E2D\u7684\u6267\u884C\u6548\u7387\u662F1\u5C42&gt;2\u5C42&gt;3\u5C42\uFF0C\u7B2C3\u5C42\u4E00\u822C\u8981\u6BD4\u7B2C2\u5C42\u616235%\u4EE5\u4E0A\uFF0C\u6240\u4EE5\u5728C2\u5FD9\u788C\u7684\u60C5\u51B5\u4E0B\uFF0C\u6267\u884C\u56FE\u4E2D\u7B2C\u2463\u6761\u8DEF\u5F84\u3002\u8FD9\u65F6\u65B9\u6CD5\u4F1A\u88AB2\u5C42\u7684C1\u7F16\u8BD1\uFF0C\u7136\u540E\u518D\u88AB3\u5C42\u7684C1\u7F16\u8BD1\uFF0C\u4EE5\u51CF\u5C11\u65B9\u6CD5\u57283\u5C42\u7684\u6267\u884C\u65F6\u95F4\u3002</li><li>\u5982\u679C\u7F16\u8BD1\u5668\u505A\u4E86\u4E00\u4E9B\u6BD4\u8F83\u6FC0\u8FDB\u7684\u4F18\u5316\uFF0C\u6BD4\u5982\u5206\u652F\u9884\u6D4B\uFF0C\u5728\u5B9E\u9645\u8FD0\u884C\u65F6\u53D1\u73B0\u9884\u6D4B\u51FA\u9519\uFF0C\u8FD9\u65F6\u5C31\u4F1A\u8FDB\u884C\u53CD\u4F18\u5316\uFF0C\u91CD\u65B0\u8FDB\u5165\u89E3\u91CA\u6267\u884C\uFF0C\u56FE\u4E2D\u7B2C\u2464\u6761\u6267\u884C\u8DEF\u5F84\u4EE3\u8868\u7684\u5C31\u662F\u53CD\u4F18\u5316\u3002</li></ul><p>\u603B\u7684\u6765\u8BF4\uFF0CC1\u7684\u7F16\u8BD1\u901F\u5EA6\u66F4\u5FEB\uFF0CC2\u7684\u7F16\u8BD1\u8D28\u91CF\u66F4\u9AD8\uFF0C\u5206\u5C42\u7F16\u8BD1\u7684\u4E0D\u540C\u7F16\u8BD1\u8DEF\u5F84\uFF0C\u4E5F\u5C31\u662FJVM\u6839\u636E\u5F53\u524D\u670D\u52A1\u7684\u8FD0\u884C\u60C5\u51B5\u6765\u5BFB\u627E\u5F53\u524D\u670D\u52A1\u7684\u6700\u4F73\u5E73\u8861\u70B9\u7684\u4E00\u4E2A\u8FC7\u7A0B\u3002\u4ECEJDK 8\u5F00\u59CB\uFF0CJVM\u9ED8\u8BA4\u5F00\u542F\u5206\u5C42\u7F16\u8BD1\u3002</p><h3 id="_3-\u5373\u65F6\u7F16\u8BD1\u7684\u89E6\u53D1" tabindex="-1"><a class="header-anchor" href="#_3-\u5373\u65F6\u7F16\u8BD1\u7684\u89E6\u53D1" aria-hidden="true">#</a> 3. \u5373\u65F6\u7F16\u8BD1\u7684\u89E6\u53D1</h3><p>Java\u865A\u62DF\u673A\u6839\u636E\u65B9\u6CD5\u7684\u8C03\u7528\u6B21\u6570\u4EE5\u53CA\u5FAA\u73AF\u56DE\u8FB9\u7684\u6267\u884C\u6B21\u6570\u6765\u89E6\u53D1\u5373\u65F6\u7F16\u8BD1\u3002\u5FAA\u73AF\u56DE\u8FB9\u662F\u4E00\u4E2A\u63A7\u5236\u6D41\u56FE\u4E2D\u7684\u6982\u5FF5\uFF0C\u7A0B\u5E8F\u4E2D\u53EF\u4EE5\u7B80\u5355\u7406\u89E3\u4E3A\u5F80\u56DE\u8DF3\u8F6C\u7684\u6307\u4EE4\uFF0C\u6BD4\u5982\u4E0B\u9762\u8FD9\u6BB5\u4EE3\u7801\uFF1A</p><p>\u5FAA\u73AF\u56DE\u8FB9</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">nlp</span><span class="token punctuation">(</span><span class="token class-name">Object</span> obj<span class="token punctuation">)</span> <span class="token punctuation">{</span>
   <span class="token keyword">int</span> sum <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span>
   <span class="token keyword">for</span> <span class="token punctuation">(</span><span class="token keyword">int</span> i <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span> i <span class="token operator">&lt;</span> <span class="token number">200</span><span class="token punctuation">;</span> i<span class="token operator">++</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
     sum <span class="token operator">+=</span> i<span class="token punctuation">;</span>
diff --git a/dist/assets/jmm.html.6df91381.js b/dist/assets/jmm.html.2560457a.js
similarity index 99%
rename from dist/assets/jmm.html.6df91381.js
rename to dist/assets/jmm.html.2560457a.js
index f10b7702..cbeebcd0 100644
--- a/dist/assets/jmm.html.6df91381.js
+++ b/dist/assets/jmm.html.2560457a.js
@@ -1,4 +1,4 @@
-import{_ as s}from"./plugin-vue_export-helper.21dcd24c.js";import{r as o,o as r,c as t,a as e,b as n,e as i,d as p}from"./app.a0271b9c.js";const l={},c=i(`<h1 id="\u5168\u9762\u7406\u89E3java\u7684\u5185\u5B58\u6A21\u578B-jmm" tabindex="-1"><a class="header-anchor" href="#\u5168\u9762\u7406\u89E3java\u7684\u5185\u5B58\u6A21\u578B-jmm" aria-hidden="true">#</a> \u5168\u9762\u7406\u89E3Java\u7684\u5185\u5B58\u6A21\u578B\uFF08JMM\uFF09</h1><p>\u5728\u9762\u8BD5\u4E2D\uFF0C\u9762\u8BD5\u5B98\u7ECF\u5E38\u559C\u6B22\u95EE\uFF1A\u300E\u8BF4\u8BF4\u4EC0\u4E48\u662FJava\u5185\u5B58\u6A21\u578B(JMM)\uFF1F\u300F</p><p>\u9762\u8BD5\u8005\u5185\u5FC3\u72C2\u559C\uFF0C\u8FD9\u9898\u521A\u80CC\u8FC7\uFF1A\u300EJava\u5185\u5B58\u4E3B\u8981\u5206\u4E3A\u4E94\u5927\u5757\uFF1A\u5806\u3001\u65B9\u6CD5\u533A\u3001\u865A\u62DF\u673A\u6808\u3001\u672C\u5730\u65B9\u6CD5\u6808\u3001PC\u5BC4\u5B58\u5668\uFF0Cbalabala\u2026\u2026\u300F</p><p>\u9762\u8BD5\u5B98\u4F1A\u5FC3\u4E00\u7B11\uFF0C\u9732\u51FA\u4E00\u9053\u5149\u8292\uFF1A\u300E\u597D\u4E86\uFF0C\u4ECA\u5929\u7684\u9762\u8BD5\u5148\u5230\u8FD9\u91CC\u4E86\uFF0C\u56DE\u53BB\u7B49\u901A\u77E5\u5427\u300F</p><p>\u4E00\u822C\u542C\u5230\u7B49\u901A\u77E5\u8FD9\u53E5\u8BDD\uFF0C\u8FD9\u573A\u9762\u8BD5\u5927\u6982\u7387\u5C31\u662F\u51C9\u51C9\u4E86\u3002\u4E3A\u4EC0\u4E48\u5462\uFF1F\u56E0\u4E3A\u9762\u8BD5\u8005\u5F04\u9519\u4E86\u6982\u5FF5\uFF0C\u9762\u8BD5\u5B98\u662F\u60F3\u8003\u5BDFJMM\uFF0C\u4F46\u662F\u9762\u8BD5\u8005\u4E00\u542C\u5230<code>Java\u5185\u5B58</code>\u8FD9\u51E0\u4E2A\u5173\u952E\u5B57\u5C31\u5F00\u59CB\u80CC\u8BF5\u516B\u80A1\u6587\u4E86\u3002Java\u5185\u5B58\u6A21\u578B(JMM)\u548CJava\u8FD0\u884C\u65F6\u5185\u5B58\u533A\u57DF\u533A\u522B\u53EF\u5927\u4E86\u5462\uFF0C\u4E0D\u8981\u8D70\u5F00\u63A5\u7740\u5F80\u4E0B\u770B\uFF0C\u7B54\u5E94\u6211\u8981\u770B\u5B8C\u3002</p><h2 id="\u5E76\u53D1\u7F16\u7A0B\u6A21\u578B\u7684\u4E24\u4E2A\u5173\u952E\u95EE\u9898" tabindex="-1"><a class="header-anchor" href="#\u5E76\u53D1\u7F16\u7A0B\u6A21\u578B\u7684\u4E24\u4E2A\u5173\u952E\u95EE\u9898" aria-hidden="true">#</a> \u5E76\u53D1\u7F16\u7A0B\u6A21\u578B\u7684\u4E24\u4E2A\u5173\u952E\u95EE\u9898</h2><ul><li>\u7EBF\u7A0B\u95F4\u5982\u4F55\u901A\u4FE1\uFF1F\u5373\uFF1A\u7EBF\u7A0B\u4E4B\u95F4\u4EE5\u4F55\u79CD\u673A\u5236\u6765\u4EA4\u6362\u4FE1\u606F</li><li>\u7EBF\u7A0B\u95F4\u5982\u4F55\u540C\u6B65\uFF1F\u5373\uFF1A\u7EBF\u7A0B\u4EE5\u4F55\u79CD\u673A\u5236\u6765\u63A7\u5236\u4E0D\u540C\u7EBF\u7A0B\u95F4\u64CD\u4F5C\u53D1\u751F\u7684\u76F8\u5BF9\u987A\u5E8F</li></ul><p>\u6709\u4E24\u79CD\u5E76\u53D1\u6A21\u578B\u53EF\u4EE5\u89E3\u51B3\u8FD9\u4E24\u4E2A\u95EE\u9898\uFF1A</p><ul><li>\u6D88\u606F\u4F20\u9012\u5E76\u53D1\u6A21\u578B</li><li>\u5171\u4EAB\u5185\u5B58\u5E76\u53D1\u6A21\u578B</li></ul><p>\u8FD9\u4E24\u79CD\u6A21\u578B\u4E4B\u95F4\u7684\u533A\u522B\u5982\u4E0B\u8868\u6240\u793A\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/jmm-a610752d-ef73-47f2-b02c-6954eb3d62bf.png" alt="\u4E24\u79CD\u5E76\u53D1\u6A21\u578B\u7684\u6BD4\u8F83"></p><p><strong>\u5728Java\u4E2D\uFF0C\u4F7F\u7528\u7684\u662F\u5171\u4EAB\u5185\u5B58\u5E76\u53D1\u6A21\u578B</strong>\u3002</p><h2 id="java\u5185\u5B58\u6A21\u578B\u7684\u62BD\u8C61\u7ED3\u6784" tabindex="-1"><a class="header-anchor" href="#java\u5185\u5B58\u6A21\u578B\u7684\u62BD\u8C61\u7ED3\u6784" aria-hidden="true">#</a> Java\u5185\u5B58\u6A21\u578B\u7684\u62BD\u8C61\u7ED3\u6784</h2><h3 id="\u8FD0\u884C\u65F6\u5185\u5B58\u7684\u5212\u5206" tabindex="-1"><a class="header-anchor" href="#\u8FD0\u884C\u65F6\u5185\u5B58\u7684\u5212\u5206" aria-hidden="true">#</a> \u8FD0\u884C\u65F6\u5185\u5B58\u7684\u5212\u5206</h3><p>\u5148\u8C08\u4E00\u4E0B\u8FD0\u884C\u65F6\u6570\u636E\u533A\uFF0C\u4E0B\u9762\u8FD9\u5F20\u56FE\u76F8\u4FE1\u5927\u5BB6\u4E00\u70B9\u90FD\u4E0D\u964C\u751F\uFF1A <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/jmm-0b9e4b1e-90e2-41bb-be89-f65e3a10fa08.png" alt="Java\u8FD0\u884C\u65F6\u6570\u636E\u533A\u57DF"></p><p>\u5BF9\u4E8E\u6BCF\u4E00\u4E2A\u7EBF\u7A0B\u6765\u8BF4\uFF0C\u6808\u90FD\u662F\u79C1\u6709\u7684\uFF0C\u800C\u5806\u662F\u5171\u6709\u7684\u3002</p><p>\u4E5F\u5C31\u662F\u8BF4\u5728\u6808\u4E2D\u7684\u53D8\u91CF\uFF08\u5C40\u90E8\u53D8\u91CF\u3001\u65B9\u6CD5\u5B9A\u4E49\u53C2\u6570\u3001\u5F02\u5E38\u5904\u7406\u5668\u53C2\u6570\uFF09\u4E0D\u4F1A\u5728\u7EBF\u7A0B\u4E4B\u95F4\u5171\u4EAB\uFF0C\u4E5F\u5C31\u4E0D\u4F1A\u6709\u5185\u5B58\u53EF\u89C1\u6027\uFF08\u4E0B\u6587\u4F1A\u8BF4\u5230\uFF09\u7684\u95EE\u9898\uFF0C\u4E5F\u4E0D\u53D7\u5185\u5B58\u6A21\u578B\u7684\u5F71\u54CD\u3002\u800C\u5728\u5806\u4E2D\u7684\u53D8\u91CF\u662F\u5171\u4EAB\u7684\uFF0C\u672C\u6587\u79F0\u4E3A\u5171\u4EAB\u53D8\u91CF\u3002</p><p>\u6240\u4EE5\uFF0C\u5185\u5B58\u53EF\u89C1\u6027\u662F\u9488\u5BF9\u7684<strong>\u5171\u4EAB\u53D8\u91CF</strong>\u3002</p><h3 id="\u65E2\u7136\u5806\u662F\u5171\u4EAB\u7684-\u4E3A\u4EC0\u4E48\u5728\u5806\u4E2D\u4F1A\u6709\u5185\u5B58\u4E0D\u53EF\u89C1\u95EE\u9898" tabindex="-1"><a class="header-anchor" href="#\u65E2\u7136\u5806\u662F\u5171\u4EAB\u7684-\u4E3A\u4EC0\u4E48\u5728\u5806\u4E2D\u4F1A\u6709\u5185\u5B58\u4E0D\u53EF\u89C1\u95EE\u9898" aria-hidden="true">#</a> \u65E2\u7136\u5806\u662F\u5171\u4EAB\u7684\uFF0C\u4E3A\u4EC0\u4E48\u5728\u5806\u4E2D\u4F1A\u6709\u5185\u5B58\u4E0D\u53EF\u89C1\u95EE\u9898\uFF1F</h3><p>\u8FD9\u662F\u56E0\u4E3A\u73B0\u4EE3\u8BA1\u7B97\u673A\u4E3A\u4E86\u9AD8\u6548\uFF0C\u5F80\u5F80\u4F1A\u5728\u9AD8\u901F\u7F13\u5B58\u533A\u4E2D\u7F13\u5B58\u5171\u4EAB\u53D8\u91CF\uFF0C\u56E0\u4E3Acpu\u8BBF\u95EE\u7F13\u5B58\u533A\u6BD4\u8BBF\u95EE\u5185\u5B58\u8981\u5FEB\u5F97\u591A\u3002</p><blockquote><p>\u7EBF\u7A0B\u4E4B\u95F4\u7684\u5171\u4EAB\u53D8\u91CF\u5B58\u5728\u4E3B\u5185\u5B58\u4E2D\uFF0C\u6BCF\u4E2A\u7EBF\u7A0B\u90FD\u6709\u4E00\u4E2A\u79C1\u6709\u7684\u672C\u5730\u5185\u5B58\uFF0C\u5B58\u50A8\u4E86\u8BE5\u7EBF\u7A0B\u4EE5\u8BFB\u3001\u5199\u5171\u4EAB\u53D8\u91CF\u7684\u526F\u672C\u3002\u672C\u5730\u5185\u5B58\u662FJava\u5185\u5B58\u6A21\u578B\u7684\u4E00\u4E2A\u62BD\u8C61\u6982\u5FF5\uFF0C\u5E76\u4E0D\u771F\u5B9E\u5B58\u5728\u3002\u5B83\u6DB5\u76D6\u4E86\u7F13\u5B58\u3001\u5199\u7F13\u51B2\u533A\u3001\u5BC4\u5B58\u5668\u7B49\u3002</p></blockquote><p>Java\u7EBF\u7A0B\u4E4B\u95F4\u7684\u901A\u4FE1\u7531Java\u5185\u5B58\u6A21\u578B\uFF08\u7B80\u79F0JMM\uFF09\u63A7\u5236\uFF0C\u4ECE\u62BD\u8C61\u7684\u89D2\u5EA6\u6765\u8BF4\uFF0CJMM\u5B9A\u4E49\u4E86\u7EBF\u7A0B\u548C\u4E3B\u5185\u5B58\u4E4B\u95F4\u7684\u62BD\u8C61\u5173\u7CFB\u3002JMM\u7684\u62BD\u8C61\u793A\u610F\u56FE\u5982\u56FE\u6240\u793A\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/jmm-f02219aa-e762-4df0-ac08-6f4cceb535c2.jpg" alt="JMM\u62BD\u8C61\u793A\u610F\u56FE"></p><p>\u4ECE\u56FE\u4E2D\u53EF\u4EE5\u770B\u51FA\uFF1A</p><ol><li>\u6240\u6709\u7684\u5171\u4EAB\u53D8\u91CF\u90FD\u5B58\u5728\u4E3B\u5185\u5B58\u4E2D\u3002</li><li>\u6BCF\u4E2A\u7EBF\u7A0B\u90FD\u4FDD\u5B58\u4E86\u4E00\u4EFD\u8BE5\u7EBF\u7A0B\u4F7F\u7528\u5230\u7684\u5171\u4EAB\u53D8\u91CF\u7684\u526F\u672C\u3002</li><li>\u5982\u679C\u7EBF\u7A0BA\u4E0E\u7EBF\u7A0BB\u4E4B\u95F4\u8981\u901A\u4FE1\u7684\u8BDD\uFF0C\u5FC5\u987B\u7ECF\u5386\u4E0B\u97622\u4E2A\u6B65\u9AA4\uFF1A <ol><li>\u7EBF\u7A0BA\u5C06\u672C\u5730\u5185\u5B58A\u4E2D\u66F4\u65B0\u8FC7\u7684\u5171\u4EAB\u53D8\u91CF\u5237\u65B0\u5230\u4E3B\u5185\u5B58\u4E2D\u53BB\u3002</li><li>\u7EBF\u7A0BB\u5230\u4E3B\u5185\u5B58\u4E2D\u53BB\u8BFB\u53D6\u7EBF\u7A0BA\u4E4B\u524D\u5DF2\u7ECF\u66F4\u65B0\u8FC7\u7684\u5171\u4EAB\u53D8\u91CF\u3002</li></ol></li></ol><p><strong>\u6240\u4EE5\uFF0C\u7EBF\u7A0BA\u65E0\u6CD5\u76F4\u63A5\u8BBF\u95EE\u7EBF\u7A0BB\u7684\u5DE5\u4F5C\u5185\u5B58\uFF0C\u7EBF\u7A0B\u95F4\u901A\u4FE1\u5FC5\u987B\u7ECF\u8FC7\u4E3B\u5185\u5B58\u3002</strong></p><p>\u6CE8\u610F\uFF0C\u6839\u636EJMM\u7684\u89C4\u5B9A\uFF0C<strong>\u7EBF\u7A0B\u5BF9\u5171\u4EAB\u53D8\u91CF\u7684\u6240\u6709\u64CD\u4F5C\u90FD\u5FC5\u987B\u5728\u81EA\u5DF1\u7684\u672C\u5730\u5185\u5B58\u4E2D\u8FDB\u884C\uFF0C\u4E0D\u80FD\u76F4\u63A5\u4ECE\u4E3B\u5185\u5B58\u4E2D\u8BFB\u53D6</strong>\u3002</p><p>\u6240\u4EE5\u7EBF\u7A0BB\u5E76\u4E0D\u662F\u76F4\u63A5\u53BB\u4E3B\u5185\u5B58\u4E2D\u8BFB\u53D6\u5171\u4EAB\u53D8\u91CF\u7684\u503C\uFF0C\u800C\u662F\u5148\u5728\u672C\u5730\u5185\u5B58B\u4E2D\u627E\u5230\u8FD9\u4E2A\u5171\u4EAB\u53D8\u91CF\uFF0C\u53D1\u73B0\u8FD9\u4E2A\u5171\u4EAB\u53D8\u91CF\u5DF2\u7ECF\u88AB\u66F4\u65B0\u4E86\uFF0C\u7136\u540E\u672C\u5730\u5185\u5B58B\u53BB\u4E3B\u5185\u5B58\u4E2D\u8BFB\u53D6\u8FD9\u4E2A\u5171\u4EAB\u53D8\u91CF\u7684\u65B0\u503C\uFF0C\u5E76\u62F7\u8D1D\u5230\u672C\u5730\u5185\u5B58B\u4E2D\uFF0C\u6700\u540E\u7EBF\u7A0BB\u518D\u8BFB\u53D6\u672C\u5730\u5185\u5B58B\u4E2D\u7684\u65B0\u503C\u3002</p><p>\u90A3\u4E48\u600E\u4E48\u77E5\u9053\u8FD9\u4E2A\u5171\u4EAB\u53D8\u91CF\u7684\u88AB\u5176\u4ED6\u7EBF\u7A0B\u66F4\u65B0\u4E86\u5462\uFF1F\u8FD9\u5C31\u662FJMM\u7684\u529F\u52B3\u4E86\uFF0C\u4E5F\u662FJMM\u5B58\u5728\u7684\u5FC5\u8981\u6027\u4E4B\u4E00\u3002<strong>JMM\u901A\u8FC7\u63A7\u5236\u4E3B\u5185\u5B58\u4E0E\u6BCF\u4E2A\u7EBF\u7A0B\u7684\u672C\u5730\u5185\u5B58\u4E4B\u95F4\u7684\u4EA4\u4E92\uFF0C\u6765\u63D0\u4F9B\u5185\u5B58\u53EF\u89C1\u6027\u4FDD\u8BC1</strong>\u3002</p><blockquote><p>Java\u4E2D\u7684volatile\u5173\u952E\u5B57\u53EF\u4EE5\u4FDD\u8BC1\u591A\u7EBF\u7A0B\u64CD\u4F5C\u5171\u4EAB\u53D8\u91CF\u7684\u53EF\u89C1\u6027\u4EE5\u53CA\u7981\u6B62\u6307\u4EE4\u91CD\u6392\u5E8F\uFF0Csynchronized\u5173\u952E\u5B57\u4E0D\u4EC5\u4FDD\u8BC1\u53EF\u89C1\u6027\uFF0C\u540C\u65F6\u4E5F\u4FDD\u8BC1\u4E86\u539F\u5B50\u6027\uFF08\u4E92\u65A5\u6027\uFF09\u3002\u5728\u66F4\u5E95\u5C42\uFF0CJMM\u901A\u8FC7\u5185\u5B58\u5C4F\u969C\u6765\u5B9E\u73B0\u5185\u5B58\u7684\u53EF\u89C1\u6027\u4EE5\u53CA\u7981\u6B62\u91CD\u6392\u5E8F\u3002\u4E3A\u4E86\u7A0B\u5E8F\u5458\u7684\u65B9\u4FBF\u7406\u89E3\uFF0C\u63D0\u51FA\u4E86happens-before\uFF0C\u5B83\u66F4\u52A0\u7684\u7B80\u5355\u6613\u61C2\uFF0C\u4ECE\u800C\u907F\u514D\u4E86\u7A0B\u5E8F\u5458\u4E3A\u4E86\u7406\u89E3\u5185\u5B58\u53EF\u89C1\u6027\u800C\u53BB\u5B66\u4E60\u590D\u6742\u7684\u91CD\u6392\u5E8F\u89C4\u5219\u4EE5\u53CA\u8FD9\u4E9B\u89C4\u5219\u7684\u5177\u4F53\u5B9E\u73B0\u65B9\u6CD5\u3002\u8FD9\u91CC\u6D89\u53CA\u5230\u7684\u6240\u6709\u5185\u5BB9\u540E\u9762\u90FD\u4F1A\u6709\u4E13\u95E8\u7684\u7AE0\u8282\u4ECB\u7ECD\u3002</p></blockquote><h3 id="jmm\u4E0Ejava\u5185\u5B58\u533A\u57DF\u5212\u5206\u7684\u533A\u522B\u4E0E\u8054\u7CFB" tabindex="-1"><a class="header-anchor" href="#jmm\u4E0Ejava\u5185\u5B58\u533A\u57DF\u5212\u5206\u7684\u533A\u522B\u4E0E\u8054\u7CFB" aria-hidden="true">#</a> JMM\u4E0EJava\u5185\u5B58\u533A\u57DF\u5212\u5206\u7684\u533A\u522B\u4E0E\u8054\u7CFB</h3><p>\u4E0A\u9762\u4E24\u5C0F\u8282\u5206\u522B\u63D0\u5230\u4E86JMM\u548CJava\u8FD0\u884C\u65F6\u5185\u5B58\u533A\u57DF\u7684\u5212\u5206\uFF0C\u8FD9\u4E24\u8005\u65E2\u6709\u5DEE\u522B\u53C8\u6709\u8054\u7CFB\uFF1A</p><ul><li><p>\u533A\u522B</p><p>\u4E24\u8005\u662F\u4E0D\u540C\u7684\u6982\u5FF5\u5C42\u6B21\u3002JMM\u662F\u62BD\u8C61\u7684\uFF0C\u4ED6\u662F\u7528\u6765\u63CF\u8FF0\u4E00\u7EC4\u89C4\u5219\uFF0C\u901A\u8FC7\u8FD9\u4E2A\u89C4\u5219\u6765\u63A7\u5236\u5404\u4E2A\u53D8\u91CF\u7684\u8BBF\u95EE\u65B9\u5F0F\uFF0C\u56F4\u7ED5\u539F\u5B50\u6027\u3001\u6709\u5E8F\u6027\u3001\u53EF\u89C1\u6027\u7B49\u5C55\u5F00\u7684\u3002\u800CJava\u8FD0\u884C\u65F6\u5185\u5B58\u7684\u5212\u5206\u662F\u5177\u4F53\u7684\uFF0C\u662FJVM\u8FD0\u884CJava\u7A0B\u5E8F\u65F6\uFF0C\u5FC5\u8981\u7684\u5185\u5B58\u5212\u5206\u3002</p></li><li><p>\u8054\u7CFB</p><p>\u90FD\u5B58\u5728\u79C1\u6709\u6570\u636E\u533A\u57DF\u548C\u5171\u4EAB\u6570\u636E\u533A\u57DF\u3002\u4E00\u822C\u6765\u8BF4\uFF0CJMM\u4E2D\u7684\u4E3B\u5185\u5B58\u5C5E\u4E8E\u5171\u4EAB\u6570\u636E\u533A\u57DF\uFF0C\u4ED6\u662F\u5305\u542B\u4E86\u5806\u548C\u65B9\u6CD5\u533A\uFF1B\u540C\u6837\uFF0CJMM\u4E2D\u7684\u672C\u5730\u5185\u5B58\u5C5E\u4E8E\u79C1\u6709\u6570\u636E\u533A\u57DF\uFF0C\u5305\u542B\u4E86\u7A0B\u5E8F\u8BA1\u6570\u5668\u3001\u672C\u5730\u65B9\u6CD5\u6808\u3001\u865A\u62DF\u673A\u6808\u3002</p></li></ul><p><strong>\u5B9E\u9645\u4E0A\uFF0C\u4ED6\u4EEC\u8868\u8FBE\u7684\u662F\u540C\u4E00\u79CD\u542B\u4E49\uFF0C\u8FD9\u91CC\u4E0D\u505A\u533A\u5206\u3002</strong></p><h2 id="\u4EC0\u4E48\u662F\u91CD\u6392\u5E8F" tabindex="-1"><a class="header-anchor" href="#\u4EC0\u4E48\u662F\u91CD\u6392\u5E8F" aria-hidden="true">#</a> \u4EC0\u4E48\u662F\u91CD\u6392\u5E8F\uFF1F</h2><p>\u8BA1\u7B97\u673A\u5728\u6267\u884C\u7A0B\u5E8F\u65F6\uFF0C\u4E3A\u4E86\u63D0\u9AD8\u6027\u80FD\uFF0C\u7F16\u8BD1\u5668\u548C\u5904\u7406\u5668\u5E38\u5E38\u4F1A\u5BF9\u6307\u4EE4\u505A\u91CD\u6392\u3002</p><p><strong>\u4E3A\u4EC0\u4E48\u6307\u4EE4\u91CD\u6392\u5E8F\u53EF\u4EE5\u63D0\u9AD8\u6027\u80FD\uFF1F</strong></p><p>\u7B80\u5355\u5730\u8BF4\uFF0C\u6BCF\u4E00\u4E2A\u6307\u4EE4\u90FD\u4F1A\u5305\u542B\u591A\u4E2A\u6B65\u9AA4\uFF0C\u6BCF\u4E2A\u6B65\u9AA4\u53EF\u80FD\u4F7F\u7528\u4E0D\u540C\u7684\u786C\u4EF6\u3002\u56E0\u6B64\uFF0C<strong>\u6D41\u6C34\u7EBF\u6280\u672F</strong>\u4EA7\u751F\u4E86\uFF0C\u5B83\u7684\u539F\u7406\u662F\u6307\u4EE41\u8FD8\u6CA1\u6709\u6267\u884C\u5B8C\uFF0C\u5C31\u53EF\u4EE5\u5F00\u59CB\u6267\u884C\u6307\u4EE42\uFF0C\u800C\u4E0D\u7528\u7B49\u5230\u6307\u4EE41\u6267\u884C\u7ED3\u675F\u4E4B\u540E\u518D\u6267\u884C\u6307\u4EE42\uFF0C\u8FD9\u6837\u5C31\u5927\u5927\u63D0\u9AD8\u4E86\u6548\u7387\u3002</p><p>\u4F46\u662F\uFF0C\u6D41\u6C34\u7EBF\u6280\u672F\u6700\u5BB3\u6015<strong>\u4E2D\u65AD</strong>\uFF0C\u6062\u590D\u4E2D\u65AD\u7684\u4EE3\u4EF7\u662F\u6BD4\u8F83\u5927\u7684\uFF0C\u6240\u4EE5\u6211\u4EEC\u8981\u60F3\u5C3D\u529E\u6CD5\u4E0D\u8BA9\u6D41\u6C34\u7EBF\u4E2D\u65AD\u3002\u6307\u4EE4\u91CD\u6392\u5C31\u662F\u51CF\u5C11\u4E2D\u65AD\u7684\u4E00\u79CD\u6280\u672F\u3002</p><p>\u6211\u4EEC\u5206\u6790\u4E00\u4E0B\u4E0B\u9762\u8FD9\u4E2A\u4EE3\u7801\u7684\u6267\u884C\u60C5\u51B5\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code>a <span class="token operator">=</span> b <span class="token operator">+</span> c<span class="token punctuation">;</span>
+import{_ as s}from"./plugin-vue_export-helper.21dcd24c.js";import{r as o,o as r,c as t,a as e,b as n,e as i,d as p}from"./app.615e41d8.js";const l={},c=i(`<h1 id="\u5168\u9762\u7406\u89E3java\u7684\u5185\u5B58\u6A21\u578B-jmm" tabindex="-1"><a class="header-anchor" href="#\u5168\u9762\u7406\u89E3java\u7684\u5185\u5B58\u6A21\u578B-jmm" aria-hidden="true">#</a> \u5168\u9762\u7406\u89E3Java\u7684\u5185\u5B58\u6A21\u578B\uFF08JMM\uFF09</h1><p>\u5728\u9762\u8BD5\u4E2D\uFF0C\u9762\u8BD5\u5B98\u7ECF\u5E38\u559C\u6B22\u95EE\uFF1A\u300E\u8BF4\u8BF4\u4EC0\u4E48\u662FJava\u5185\u5B58\u6A21\u578B(JMM)\uFF1F\u300F</p><p>\u9762\u8BD5\u8005\u5185\u5FC3\u72C2\u559C\uFF0C\u8FD9\u9898\u521A\u80CC\u8FC7\uFF1A\u300EJava\u5185\u5B58\u4E3B\u8981\u5206\u4E3A\u4E94\u5927\u5757\uFF1A\u5806\u3001\u65B9\u6CD5\u533A\u3001\u865A\u62DF\u673A\u6808\u3001\u672C\u5730\u65B9\u6CD5\u6808\u3001PC\u5BC4\u5B58\u5668\uFF0Cbalabala\u2026\u2026\u300F</p><p>\u9762\u8BD5\u5B98\u4F1A\u5FC3\u4E00\u7B11\uFF0C\u9732\u51FA\u4E00\u9053\u5149\u8292\uFF1A\u300E\u597D\u4E86\uFF0C\u4ECA\u5929\u7684\u9762\u8BD5\u5148\u5230\u8FD9\u91CC\u4E86\uFF0C\u56DE\u53BB\u7B49\u901A\u77E5\u5427\u300F</p><p>\u4E00\u822C\u542C\u5230\u7B49\u901A\u77E5\u8FD9\u53E5\u8BDD\uFF0C\u8FD9\u573A\u9762\u8BD5\u5927\u6982\u7387\u5C31\u662F\u51C9\u51C9\u4E86\u3002\u4E3A\u4EC0\u4E48\u5462\uFF1F\u56E0\u4E3A\u9762\u8BD5\u8005\u5F04\u9519\u4E86\u6982\u5FF5\uFF0C\u9762\u8BD5\u5B98\u662F\u60F3\u8003\u5BDFJMM\uFF0C\u4F46\u662F\u9762\u8BD5\u8005\u4E00\u542C\u5230<code>Java\u5185\u5B58</code>\u8FD9\u51E0\u4E2A\u5173\u952E\u5B57\u5C31\u5F00\u59CB\u80CC\u8BF5\u516B\u80A1\u6587\u4E86\u3002Java\u5185\u5B58\u6A21\u578B(JMM)\u548CJava\u8FD0\u884C\u65F6\u5185\u5B58\u533A\u57DF\u533A\u522B\u53EF\u5927\u4E86\u5462\uFF0C\u4E0D\u8981\u8D70\u5F00\u63A5\u7740\u5F80\u4E0B\u770B\uFF0C\u7B54\u5E94\u6211\u8981\u770B\u5B8C\u3002</p><h2 id="\u5E76\u53D1\u7F16\u7A0B\u6A21\u578B\u7684\u4E24\u4E2A\u5173\u952E\u95EE\u9898" tabindex="-1"><a class="header-anchor" href="#\u5E76\u53D1\u7F16\u7A0B\u6A21\u578B\u7684\u4E24\u4E2A\u5173\u952E\u95EE\u9898" aria-hidden="true">#</a> \u5E76\u53D1\u7F16\u7A0B\u6A21\u578B\u7684\u4E24\u4E2A\u5173\u952E\u95EE\u9898</h2><ul><li>\u7EBF\u7A0B\u95F4\u5982\u4F55\u901A\u4FE1\uFF1F\u5373\uFF1A\u7EBF\u7A0B\u4E4B\u95F4\u4EE5\u4F55\u79CD\u673A\u5236\u6765\u4EA4\u6362\u4FE1\u606F</li><li>\u7EBF\u7A0B\u95F4\u5982\u4F55\u540C\u6B65\uFF1F\u5373\uFF1A\u7EBF\u7A0B\u4EE5\u4F55\u79CD\u673A\u5236\u6765\u63A7\u5236\u4E0D\u540C\u7EBF\u7A0B\u95F4\u64CD\u4F5C\u53D1\u751F\u7684\u76F8\u5BF9\u987A\u5E8F</li></ul><p>\u6709\u4E24\u79CD\u5E76\u53D1\u6A21\u578B\u53EF\u4EE5\u89E3\u51B3\u8FD9\u4E24\u4E2A\u95EE\u9898\uFF1A</p><ul><li>\u6D88\u606F\u4F20\u9012\u5E76\u53D1\u6A21\u578B</li><li>\u5171\u4EAB\u5185\u5B58\u5E76\u53D1\u6A21\u578B</li></ul><p>\u8FD9\u4E24\u79CD\u6A21\u578B\u4E4B\u95F4\u7684\u533A\u522B\u5982\u4E0B\u8868\u6240\u793A\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/jmm-a610752d-ef73-47f2-b02c-6954eb3d62bf.png" alt="\u4E24\u79CD\u5E76\u53D1\u6A21\u578B\u7684\u6BD4\u8F83"></p><p><strong>\u5728Java\u4E2D\uFF0C\u4F7F\u7528\u7684\u662F\u5171\u4EAB\u5185\u5B58\u5E76\u53D1\u6A21\u578B</strong>\u3002</p><h2 id="java\u5185\u5B58\u6A21\u578B\u7684\u62BD\u8C61\u7ED3\u6784" tabindex="-1"><a class="header-anchor" href="#java\u5185\u5B58\u6A21\u578B\u7684\u62BD\u8C61\u7ED3\u6784" aria-hidden="true">#</a> Java\u5185\u5B58\u6A21\u578B\u7684\u62BD\u8C61\u7ED3\u6784</h2><h3 id="\u8FD0\u884C\u65F6\u5185\u5B58\u7684\u5212\u5206" tabindex="-1"><a class="header-anchor" href="#\u8FD0\u884C\u65F6\u5185\u5B58\u7684\u5212\u5206" aria-hidden="true">#</a> \u8FD0\u884C\u65F6\u5185\u5B58\u7684\u5212\u5206</h3><p>\u5148\u8C08\u4E00\u4E0B\u8FD0\u884C\u65F6\u6570\u636E\u533A\uFF0C\u4E0B\u9762\u8FD9\u5F20\u56FE\u76F8\u4FE1\u5927\u5BB6\u4E00\u70B9\u90FD\u4E0D\u964C\u751F\uFF1A <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/jmm-0b9e4b1e-90e2-41bb-be89-f65e3a10fa08.png" alt="Java\u8FD0\u884C\u65F6\u6570\u636E\u533A\u57DF"></p><p>\u5BF9\u4E8E\u6BCF\u4E00\u4E2A\u7EBF\u7A0B\u6765\u8BF4\uFF0C\u6808\u90FD\u662F\u79C1\u6709\u7684\uFF0C\u800C\u5806\u662F\u5171\u6709\u7684\u3002</p><p>\u4E5F\u5C31\u662F\u8BF4\u5728\u6808\u4E2D\u7684\u53D8\u91CF\uFF08\u5C40\u90E8\u53D8\u91CF\u3001\u65B9\u6CD5\u5B9A\u4E49\u53C2\u6570\u3001\u5F02\u5E38\u5904\u7406\u5668\u53C2\u6570\uFF09\u4E0D\u4F1A\u5728\u7EBF\u7A0B\u4E4B\u95F4\u5171\u4EAB\uFF0C\u4E5F\u5C31\u4E0D\u4F1A\u6709\u5185\u5B58\u53EF\u89C1\u6027\uFF08\u4E0B\u6587\u4F1A\u8BF4\u5230\uFF09\u7684\u95EE\u9898\uFF0C\u4E5F\u4E0D\u53D7\u5185\u5B58\u6A21\u578B\u7684\u5F71\u54CD\u3002\u800C\u5728\u5806\u4E2D\u7684\u53D8\u91CF\u662F\u5171\u4EAB\u7684\uFF0C\u672C\u6587\u79F0\u4E3A\u5171\u4EAB\u53D8\u91CF\u3002</p><p>\u6240\u4EE5\uFF0C\u5185\u5B58\u53EF\u89C1\u6027\u662F\u9488\u5BF9\u7684<strong>\u5171\u4EAB\u53D8\u91CF</strong>\u3002</p><h3 id="\u65E2\u7136\u5806\u662F\u5171\u4EAB\u7684-\u4E3A\u4EC0\u4E48\u5728\u5806\u4E2D\u4F1A\u6709\u5185\u5B58\u4E0D\u53EF\u89C1\u95EE\u9898" tabindex="-1"><a class="header-anchor" href="#\u65E2\u7136\u5806\u662F\u5171\u4EAB\u7684-\u4E3A\u4EC0\u4E48\u5728\u5806\u4E2D\u4F1A\u6709\u5185\u5B58\u4E0D\u53EF\u89C1\u95EE\u9898" aria-hidden="true">#</a> \u65E2\u7136\u5806\u662F\u5171\u4EAB\u7684\uFF0C\u4E3A\u4EC0\u4E48\u5728\u5806\u4E2D\u4F1A\u6709\u5185\u5B58\u4E0D\u53EF\u89C1\u95EE\u9898\uFF1F</h3><p>\u8FD9\u662F\u56E0\u4E3A\u73B0\u4EE3\u8BA1\u7B97\u673A\u4E3A\u4E86\u9AD8\u6548\uFF0C\u5F80\u5F80\u4F1A\u5728\u9AD8\u901F\u7F13\u5B58\u533A\u4E2D\u7F13\u5B58\u5171\u4EAB\u53D8\u91CF\uFF0C\u56E0\u4E3Acpu\u8BBF\u95EE\u7F13\u5B58\u533A\u6BD4\u8BBF\u95EE\u5185\u5B58\u8981\u5FEB\u5F97\u591A\u3002</p><blockquote><p>\u7EBF\u7A0B\u4E4B\u95F4\u7684\u5171\u4EAB\u53D8\u91CF\u5B58\u5728\u4E3B\u5185\u5B58\u4E2D\uFF0C\u6BCF\u4E2A\u7EBF\u7A0B\u90FD\u6709\u4E00\u4E2A\u79C1\u6709\u7684\u672C\u5730\u5185\u5B58\uFF0C\u5B58\u50A8\u4E86\u8BE5\u7EBF\u7A0B\u4EE5\u8BFB\u3001\u5199\u5171\u4EAB\u53D8\u91CF\u7684\u526F\u672C\u3002\u672C\u5730\u5185\u5B58\u662FJava\u5185\u5B58\u6A21\u578B\u7684\u4E00\u4E2A\u62BD\u8C61\u6982\u5FF5\uFF0C\u5E76\u4E0D\u771F\u5B9E\u5B58\u5728\u3002\u5B83\u6DB5\u76D6\u4E86\u7F13\u5B58\u3001\u5199\u7F13\u51B2\u533A\u3001\u5BC4\u5B58\u5668\u7B49\u3002</p></blockquote><p>Java\u7EBF\u7A0B\u4E4B\u95F4\u7684\u901A\u4FE1\u7531Java\u5185\u5B58\u6A21\u578B\uFF08\u7B80\u79F0JMM\uFF09\u63A7\u5236\uFF0C\u4ECE\u62BD\u8C61\u7684\u89D2\u5EA6\u6765\u8BF4\uFF0CJMM\u5B9A\u4E49\u4E86\u7EBF\u7A0B\u548C\u4E3B\u5185\u5B58\u4E4B\u95F4\u7684\u62BD\u8C61\u5173\u7CFB\u3002JMM\u7684\u62BD\u8C61\u793A\u610F\u56FE\u5982\u56FE\u6240\u793A\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/jmm-f02219aa-e762-4df0-ac08-6f4cceb535c2.jpg" alt="JMM\u62BD\u8C61\u793A\u610F\u56FE"></p><p>\u4ECE\u56FE\u4E2D\u53EF\u4EE5\u770B\u51FA\uFF1A</p><ol><li>\u6240\u6709\u7684\u5171\u4EAB\u53D8\u91CF\u90FD\u5B58\u5728\u4E3B\u5185\u5B58\u4E2D\u3002</li><li>\u6BCF\u4E2A\u7EBF\u7A0B\u90FD\u4FDD\u5B58\u4E86\u4E00\u4EFD\u8BE5\u7EBF\u7A0B\u4F7F\u7528\u5230\u7684\u5171\u4EAB\u53D8\u91CF\u7684\u526F\u672C\u3002</li><li>\u5982\u679C\u7EBF\u7A0BA\u4E0E\u7EBF\u7A0BB\u4E4B\u95F4\u8981\u901A\u4FE1\u7684\u8BDD\uFF0C\u5FC5\u987B\u7ECF\u5386\u4E0B\u97622\u4E2A\u6B65\u9AA4\uFF1A <ol><li>\u7EBF\u7A0BA\u5C06\u672C\u5730\u5185\u5B58A\u4E2D\u66F4\u65B0\u8FC7\u7684\u5171\u4EAB\u53D8\u91CF\u5237\u65B0\u5230\u4E3B\u5185\u5B58\u4E2D\u53BB\u3002</li><li>\u7EBF\u7A0BB\u5230\u4E3B\u5185\u5B58\u4E2D\u53BB\u8BFB\u53D6\u7EBF\u7A0BA\u4E4B\u524D\u5DF2\u7ECF\u66F4\u65B0\u8FC7\u7684\u5171\u4EAB\u53D8\u91CF\u3002</li></ol></li></ol><p><strong>\u6240\u4EE5\uFF0C\u7EBF\u7A0BA\u65E0\u6CD5\u76F4\u63A5\u8BBF\u95EE\u7EBF\u7A0BB\u7684\u5DE5\u4F5C\u5185\u5B58\uFF0C\u7EBF\u7A0B\u95F4\u901A\u4FE1\u5FC5\u987B\u7ECF\u8FC7\u4E3B\u5185\u5B58\u3002</strong></p><p>\u6CE8\u610F\uFF0C\u6839\u636EJMM\u7684\u89C4\u5B9A\uFF0C<strong>\u7EBF\u7A0B\u5BF9\u5171\u4EAB\u53D8\u91CF\u7684\u6240\u6709\u64CD\u4F5C\u90FD\u5FC5\u987B\u5728\u81EA\u5DF1\u7684\u672C\u5730\u5185\u5B58\u4E2D\u8FDB\u884C\uFF0C\u4E0D\u80FD\u76F4\u63A5\u4ECE\u4E3B\u5185\u5B58\u4E2D\u8BFB\u53D6</strong>\u3002</p><p>\u6240\u4EE5\u7EBF\u7A0BB\u5E76\u4E0D\u662F\u76F4\u63A5\u53BB\u4E3B\u5185\u5B58\u4E2D\u8BFB\u53D6\u5171\u4EAB\u53D8\u91CF\u7684\u503C\uFF0C\u800C\u662F\u5148\u5728\u672C\u5730\u5185\u5B58B\u4E2D\u627E\u5230\u8FD9\u4E2A\u5171\u4EAB\u53D8\u91CF\uFF0C\u53D1\u73B0\u8FD9\u4E2A\u5171\u4EAB\u53D8\u91CF\u5DF2\u7ECF\u88AB\u66F4\u65B0\u4E86\uFF0C\u7136\u540E\u672C\u5730\u5185\u5B58B\u53BB\u4E3B\u5185\u5B58\u4E2D\u8BFB\u53D6\u8FD9\u4E2A\u5171\u4EAB\u53D8\u91CF\u7684\u65B0\u503C\uFF0C\u5E76\u62F7\u8D1D\u5230\u672C\u5730\u5185\u5B58B\u4E2D\uFF0C\u6700\u540E\u7EBF\u7A0BB\u518D\u8BFB\u53D6\u672C\u5730\u5185\u5B58B\u4E2D\u7684\u65B0\u503C\u3002</p><p>\u90A3\u4E48\u600E\u4E48\u77E5\u9053\u8FD9\u4E2A\u5171\u4EAB\u53D8\u91CF\u7684\u88AB\u5176\u4ED6\u7EBF\u7A0B\u66F4\u65B0\u4E86\u5462\uFF1F\u8FD9\u5C31\u662FJMM\u7684\u529F\u52B3\u4E86\uFF0C\u4E5F\u662FJMM\u5B58\u5728\u7684\u5FC5\u8981\u6027\u4E4B\u4E00\u3002<strong>JMM\u901A\u8FC7\u63A7\u5236\u4E3B\u5185\u5B58\u4E0E\u6BCF\u4E2A\u7EBF\u7A0B\u7684\u672C\u5730\u5185\u5B58\u4E4B\u95F4\u7684\u4EA4\u4E92\uFF0C\u6765\u63D0\u4F9B\u5185\u5B58\u53EF\u89C1\u6027\u4FDD\u8BC1</strong>\u3002</p><blockquote><p>Java\u4E2D\u7684volatile\u5173\u952E\u5B57\u53EF\u4EE5\u4FDD\u8BC1\u591A\u7EBF\u7A0B\u64CD\u4F5C\u5171\u4EAB\u53D8\u91CF\u7684\u53EF\u89C1\u6027\u4EE5\u53CA\u7981\u6B62\u6307\u4EE4\u91CD\u6392\u5E8F\uFF0Csynchronized\u5173\u952E\u5B57\u4E0D\u4EC5\u4FDD\u8BC1\u53EF\u89C1\u6027\uFF0C\u540C\u65F6\u4E5F\u4FDD\u8BC1\u4E86\u539F\u5B50\u6027\uFF08\u4E92\u65A5\u6027\uFF09\u3002\u5728\u66F4\u5E95\u5C42\uFF0CJMM\u901A\u8FC7\u5185\u5B58\u5C4F\u969C\u6765\u5B9E\u73B0\u5185\u5B58\u7684\u53EF\u89C1\u6027\u4EE5\u53CA\u7981\u6B62\u91CD\u6392\u5E8F\u3002\u4E3A\u4E86\u7A0B\u5E8F\u5458\u7684\u65B9\u4FBF\u7406\u89E3\uFF0C\u63D0\u51FA\u4E86happens-before\uFF0C\u5B83\u66F4\u52A0\u7684\u7B80\u5355\u6613\u61C2\uFF0C\u4ECE\u800C\u907F\u514D\u4E86\u7A0B\u5E8F\u5458\u4E3A\u4E86\u7406\u89E3\u5185\u5B58\u53EF\u89C1\u6027\u800C\u53BB\u5B66\u4E60\u590D\u6742\u7684\u91CD\u6392\u5E8F\u89C4\u5219\u4EE5\u53CA\u8FD9\u4E9B\u89C4\u5219\u7684\u5177\u4F53\u5B9E\u73B0\u65B9\u6CD5\u3002\u8FD9\u91CC\u6D89\u53CA\u5230\u7684\u6240\u6709\u5185\u5BB9\u540E\u9762\u90FD\u4F1A\u6709\u4E13\u95E8\u7684\u7AE0\u8282\u4ECB\u7ECD\u3002</p></blockquote><h3 id="jmm\u4E0Ejava\u5185\u5B58\u533A\u57DF\u5212\u5206\u7684\u533A\u522B\u4E0E\u8054\u7CFB" tabindex="-1"><a class="header-anchor" href="#jmm\u4E0Ejava\u5185\u5B58\u533A\u57DF\u5212\u5206\u7684\u533A\u522B\u4E0E\u8054\u7CFB" aria-hidden="true">#</a> JMM\u4E0EJava\u5185\u5B58\u533A\u57DF\u5212\u5206\u7684\u533A\u522B\u4E0E\u8054\u7CFB</h3><p>\u4E0A\u9762\u4E24\u5C0F\u8282\u5206\u522B\u63D0\u5230\u4E86JMM\u548CJava\u8FD0\u884C\u65F6\u5185\u5B58\u533A\u57DF\u7684\u5212\u5206\uFF0C\u8FD9\u4E24\u8005\u65E2\u6709\u5DEE\u522B\u53C8\u6709\u8054\u7CFB\uFF1A</p><ul><li><p>\u533A\u522B</p><p>\u4E24\u8005\u662F\u4E0D\u540C\u7684\u6982\u5FF5\u5C42\u6B21\u3002JMM\u662F\u62BD\u8C61\u7684\uFF0C\u4ED6\u662F\u7528\u6765\u63CF\u8FF0\u4E00\u7EC4\u89C4\u5219\uFF0C\u901A\u8FC7\u8FD9\u4E2A\u89C4\u5219\u6765\u63A7\u5236\u5404\u4E2A\u53D8\u91CF\u7684\u8BBF\u95EE\u65B9\u5F0F\uFF0C\u56F4\u7ED5\u539F\u5B50\u6027\u3001\u6709\u5E8F\u6027\u3001\u53EF\u89C1\u6027\u7B49\u5C55\u5F00\u7684\u3002\u800CJava\u8FD0\u884C\u65F6\u5185\u5B58\u7684\u5212\u5206\u662F\u5177\u4F53\u7684\uFF0C\u662FJVM\u8FD0\u884CJava\u7A0B\u5E8F\u65F6\uFF0C\u5FC5\u8981\u7684\u5185\u5B58\u5212\u5206\u3002</p></li><li><p>\u8054\u7CFB</p><p>\u90FD\u5B58\u5728\u79C1\u6709\u6570\u636E\u533A\u57DF\u548C\u5171\u4EAB\u6570\u636E\u533A\u57DF\u3002\u4E00\u822C\u6765\u8BF4\uFF0CJMM\u4E2D\u7684\u4E3B\u5185\u5B58\u5C5E\u4E8E\u5171\u4EAB\u6570\u636E\u533A\u57DF\uFF0C\u4ED6\u662F\u5305\u542B\u4E86\u5806\u548C\u65B9\u6CD5\u533A\uFF1B\u540C\u6837\uFF0CJMM\u4E2D\u7684\u672C\u5730\u5185\u5B58\u5C5E\u4E8E\u79C1\u6709\u6570\u636E\u533A\u57DF\uFF0C\u5305\u542B\u4E86\u7A0B\u5E8F\u8BA1\u6570\u5668\u3001\u672C\u5730\u65B9\u6CD5\u6808\u3001\u865A\u62DF\u673A\u6808\u3002</p></li></ul><p><strong>\u5B9E\u9645\u4E0A\uFF0C\u4ED6\u4EEC\u8868\u8FBE\u7684\u662F\u540C\u4E00\u79CD\u542B\u4E49\uFF0C\u8FD9\u91CC\u4E0D\u505A\u533A\u5206\u3002</strong></p><h2 id="\u4EC0\u4E48\u662F\u91CD\u6392\u5E8F" tabindex="-1"><a class="header-anchor" href="#\u4EC0\u4E48\u662F\u91CD\u6392\u5E8F" aria-hidden="true">#</a> \u4EC0\u4E48\u662F\u91CD\u6392\u5E8F\uFF1F</h2><p>\u8BA1\u7B97\u673A\u5728\u6267\u884C\u7A0B\u5E8F\u65F6\uFF0C\u4E3A\u4E86\u63D0\u9AD8\u6027\u80FD\uFF0C\u7F16\u8BD1\u5668\u548C\u5904\u7406\u5668\u5E38\u5E38\u4F1A\u5BF9\u6307\u4EE4\u505A\u91CD\u6392\u3002</p><p><strong>\u4E3A\u4EC0\u4E48\u6307\u4EE4\u91CD\u6392\u5E8F\u53EF\u4EE5\u63D0\u9AD8\u6027\u80FD\uFF1F</strong></p><p>\u7B80\u5355\u5730\u8BF4\uFF0C\u6BCF\u4E00\u4E2A\u6307\u4EE4\u90FD\u4F1A\u5305\u542B\u591A\u4E2A\u6B65\u9AA4\uFF0C\u6BCF\u4E2A\u6B65\u9AA4\u53EF\u80FD\u4F7F\u7528\u4E0D\u540C\u7684\u786C\u4EF6\u3002\u56E0\u6B64\uFF0C<strong>\u6D41\u6C34\u7EBF\u6280\u672F</strong>\u4EA7\u751F\u4E86\uFF0C\u5B83\u7684\u539F\u7406\u662F\u6307\u4EE41\u8FD8\u6CA1\u6709\u6267\u884C\u5B8C\uFF0C\u5C31\u53EF\u4EE5\u5F00\u59CB\u6267\u884C\u6307\u4EE42\uFF0C\u800C\u4E0D\u7528\u7B49\u5230\u6307\u4EE41\u6267\u884C\u7ED3\u675F\u4E4B\u540E\u518D\u6267\u884C\u6307\u4EE42\uFF0C\u8FD9\u6837\u5C31\u5927\u5927\u63D0\u9AD8\u4E86\u6548\u7387\u3002</p><p>\u4F46\u662F\uFF0C\u6D41\u6C34\u7EBF\u6280\u672F\u6700\u5BB3\u6015<strong>\u4E2D\u65AD</strong>\uFF0C\u6062\u590D\u4E2D\u65AD\u7684\u4EE3\u4EF7\u662F\u6BD4\u8F83\u5927\u7684\uFF0C\u6240\u4EE5\u6211\u4EEC\u8981\u60F3\u5C3D\u529E\u6CD5\u4E0D\u8BA9\u6D41\u6C34\u7EBF\u4E2D\u65AD\u3002\u6307\u4EE4\u91CD\u6392\u5C31\u662F\u51CF\u5C11\u4E2D\u65AD\u7684\u4E00\u79CD\u6280\u672F\u3002</p><p>\u6211\u4EEC\u5206\u6790\u4E00\u4E0B\u4E0B\u9762\u8FD9\u4E2A\u4EE3\u7801\u7684\u6267\u884C\u60C5\u51B5\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code>a <span class="token operator">=</span> b <span class="token operator">+</span> c<span class="token punctuation">;</span>
 d <span class="token operator">=</span> e <span class="token operator">-</span> f <span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><p>\u5148\u52A0\u8F7Db\u3001c\uFF08<strong>\u6CE8\u610F\uFF0C\u5373\u6709\u53EF\u80FD\u5148\u52A0\u8F7Db\uFF0C\u4E5F\u6709\u53EF\u80FD\u5148\u52A0\u8F7Dc</strong>\uFF09\uFF0C\u4F46\u662F\u5728\u6267\u884Cadd(b,c)\u7684\u65F6\u5019\uFF0C\u9700\u8981\u7B49\u5F85b\u3001c\u88C5\u8F7D\u7ED3\u675F\u624D\u80FD\u7EE7\u7EED\u6267\u884C\uFF0C\u4E5F\u5C31\u662F\u589E\u52A0\u4E86\u505C\u987F\uFF0C\u90A3\u4E48\u540E\u9762\u7684\u6307\u4EE4\u4E5F\u4F1A\u4F9D\u6B21\u6709\u505C\u987F,\u8FD9\u964D\u4F4E\u4E86\u8BA1\u7B97\u673A\u7684\u6267\u884C\u6548\u7387\u3002</p><p>\u4E3A\u4E86\u51CF\u5C11\u8FD9\u4E2A\u505C\u987F\uFF0C\u6211\u4EEC\u53EF\u4EE5\u5148\u52A0\u8F7De\u548Cf,\u7136\u540E\u518D\u53BB\u52A0\u8F7Dadd(b,c),\u8FD9\u6837\u505A\u5BF9\u7A0B\u5E8F\uFF08\u4E32\u884C\uFF09\u662F\u6CA1\u6709\u5F71\u54CD\u7684,\u4F46\u5374\u51CF\u5C11\u4E86\u505C\u987F\u3002\u65E2\u7136add(b,c)\u9700\u8981\u505C\u987F\uFF0C\u90A3\u8FD8\u4E0D\u5982\u53BB\u505A\u4E00\u4E9B\u6709\u610F\u4E49\u7684\u4E8B\u60C5\u3002</p><p>\u7EFC\u4E0A\u6240\u8FF0\uFF0C<strong>\u6307\u4EE4\u91CD\u6392\u5BF9\u4E8E\u63D0\u9AD8CPU\u5904\u7406\u6027\u80FD\u5341\u5206\u5FC5\u8981\u3002\u867D\u7136\u7531\u6B64\u5E26\u6765\u4E86\u4E71\u5E8F\u7684\u95EE\u9898\uFF0C\u4F46\u662F\u8FD9\u70B9\u727A\u7272\u662F\u503C\u5F97\u7684\u3002</strong></p><p>\u6307\u4EE4\u91CD\u6392\u4E00\u822C\u5206\u4E3A\u4EE5\u4E0B\u4E09\u79CD\uFF1A</p><ul><li><p><strong>\u7F16\u8BD1\u5668\u4F18\u5316\u91CD\u6392</strong></p><p>\u7F16\u8BD1\u5668\u5728<strong>\u4E0D\u6539\u53D8\u5355\u7EBF\u7A0B\u7A0B\u5E8F\u8BED\u4E49</strong>\u7684\u524D\u63D0\u4E0B\uFF0C\u53EF\u4EE5\u91CD\u65B0\u5B89\u6392\u8BED\u53E5\u7684\u6267\u884C\u987A\u5E8F\u3002</p></li><li><p><strong>\u6307\u4EE4\u5E76\u884C\u91CD\u6392</strong></p><p>\u73B0\u4EE3\u5904\u7406\u5668\u91C7\u7528\u4E86\u6307\u4EE4\u7EA7\u5E76\u884C\u6280\u672F\u6765\u5C06\u591A\u6761\u6307\u4EE4\u91CD\u53E0\u6267\u884C\u3002\u5982\u679C<strong>\u4E0D\u5B58\u5728\u6570\u636E\u4F9D\u8D56\u6027</strong>(\u5373\u540E\u4E00\u4E2A\u6267\u884C\u7684\u8BED\u53E5\u65E0\u9700\u4F9D\u8D56\u524D\u9762\u6267\u884C\u7684\u8BED\u53E5\u7684\u7ED3\u679C)\uFF0C\u5904\u7406\u5668\u53EF\u4EE5\u6539\u53D8\u8BED\u53E5\u5BF9\u5E94\u7684\u673A\u5668\u6307\u4EE4\u7684\u6267\u884C\u987A\u5E8F\u3002</p></li><li><p><strong>\u5185\u5B58\u7CFB\u7EDF\u91CD\u6392</strong></p><p>\u7531\u4E8E\u5904\u7406\u5668\u4F7F\u7528\u7F13\u5B58\u548C\u8BFB\u5199\u7F13\u5B58\u51B2\u533A\uFF0C\u8FD9\u4F7F\u5F97\u52A0\u8F7D(load)\u548C\u5B58\u50A8(store)\u64CD\u4F5C\u770B\u4E0A\u53BB\u53EF\u80FD\u662F\u5728\u4E71\u5E8F\u6267\u884C\uFF0C\u56E0\u4E3A\u4E09\u7EA7\u7F13\u5B58\u7684\u5B58\u5728\uFF0C\u5BFC\u81F4\u5185\u5B58\u4E0E\u7F13\u5B58\u7684\u6570\u636E\u540C\u6B65\u5B58\u5728\u65F6\u95F4\u5DEE\u3002</p></li></ul><p><strong>\u6307\u4EE4\u91CD\u6392\u53EF\u4EE5\u4FDD\u8BC1\u4E32\u884C\u8BED\u4E49\u4E00\u81F4\uFF0C\u4F46\u662F\u6CA1\u6709\u4E49\u52A1\u4FDD\u8BC1\u591A\u7EBF\u7A0B\u95F4\u7684\u8BED\u4E49\u4E5F\u4E00\u81F4</strong>\u3002\u6240\u4EE5\u5728\u591A\u7EBF\u7A0B\u4E0B\uFF0C\u6307\u4EE4\u91CD\u6392\u5E8F\u53EF\u80FD\u4F1A\u5BFC\u81F4\u4E00\u4E9B\u95EE\u9898\u3002</p><h2 id="\u987A\u5E8F\u4E00\u81F4\u6027\u6A21\u578B\u4E0Ejmm\u7684\u4FDD\u8BC1" tabindex="-1"><a class="header-anchor" href="#\u987A\u5E8F\u4E00\u81F4\u6027\u6A21\u578B\u4E0Ejmm\u7684\u4FDD\u8BC1" aria-hidden="true">#</a> \u987A\u5E8F\u4E00\u81F4\u6027\u6A21\u578B\u4E0EJMM\u7684\u4FDD\u8BC1</h2><p>\u987A\u5E8F\u4E00\u81F4\u6027\u6A21\u578B\u662F\u4E00\u4E2A<strong>\u7406\u8BBA\u53C2\u8003\u6A21\u578B</strong>\uFF0C\u5185\u5B58\u6A21\u578B\u5728\u8BBE\u8BA1\u7684\u65F6\u5019\u90FD\u4F1A\u4EE5\u987A\u5E8F\u4E00\u81F4\u6027\u5185\u5B58\u6A21\u578B\u4F5C\u4E3A\u53C2\u8003\u3002</p><h3 id="\u6570\u636E\u7ADE\u4E89\u4E0E\u987A\u5E8F\u4E00\u81F4\u6027" tabindex="-1"><a class="header-anchor" href="#\u6570\u636E\u7ADE\u4E89\u4E0E\u987A\u5E8F\u4E00\u81F4\u6027" aria-hidden="true">#</a> \u6570\u636E\u7ADE\u4E89\u4E0E\u987A\u5E8F\u4E00\u81F4\u6027</h3><p>\u5F53\u7A0B\u5E8F\u672A\u6B63\u786E\u540C\u6B65\u7684\u65F6\u5019\uFF0C\u5C31\u53EF\u80FD\u5B58\u5728\u6570\u636E\u7ADE\u4E89\u3002</p><blockquote><p>\u6570\u636E\u7ADE\u4E89\uFF1A\u5728\u4E00\u4E2A\u7EBF\u7A0B\u4E2D\u5199\u4E00\u4E2A\u53D8\u91CF\uFF0C\u5728\u53E6\u4E00\u4E2A\u7EBF\u7A0B\u8BFB\u540C\u4E00\u4E2A\u53D8\u91CF\uFF0C\u5E76\u4E14\u5199\u548C\u8BFB\u6CA1\u6709\u901A\u8FC7\u540C\u6B65\u6765\u6392\u5E8F\u3002</p></blockquote><p>\u5982\u679C\u7A0B\u5E8F\u4E2D\u5305\u542B\u4E86\u6570\u636E\u7ADE\u4E89\uFF0C\u90A3\u4E48\u8FD0\u884C\u7684\u7ED3\u679C\u5F80\u5F80\u5145\u6EE1\u4E86<strong>\u4E0D\u786E\u5B9A\u6027</strong>\uFF0C\u6BD4\u5982\u8BFB\u53D1\u751F\u5728\u4E86\u5199\u4E4B\u524D\uFF0C\u53EF\u80FD\u5C31\u4F1A\u8BFB\u5230\u9519\u8BEF\u7684\u503C\uFF1B\u5982\u679C\u4E00\u4E2A\u7EBF\u7A0B\u7A0B\u5E8F\u80FD\u591F\u6B63\u786E\u540C\u6B65\uFF0C\u90A3\u4E48\u5C31\u4E0D\u5B58\u5728\u6570\u636E\u7ADE\u4E89\u3002</p><p>Java\u5185\u5B58\u6A21\u578B\uFF08JMM\uFF09\u5BF9\u4E8E\u6B63\u786E\u540C\u6B65\u591A\u7EBF\u7A0B\u7A0B\u5E8F\u7684\u5185\u5B58\u4E00\u81F4\u6027\u505A\u4E86\u4EE5\u4E0B\u4FDD\u8BC1\uFF1A</p><blockquote><p><strong>\u5982\u679C\u7A0B\u5E8F\u662F\u6B63\u786E\u540C\u6B65\u7684\uFF0C\u7A0B\u5E8F\u7684\u6267\u884C\u5C06\u5177\u6709\u987A\u5E8F\u4E00\u81F4\u6027</strong>\u3002 \u5373\u7A0B\u5E8F\u7684\u6267\u884C\u7ED3\u679C\u548C\u8BE5\u7A0B\u5E8F\u5728\u987A\u5E8F\u4E00\u81F4\u6027\u6A21\u578B\u4E2D\u6267\u884C\u7684\u7ED3\u679C\u76F8\u540C\u3002</p></blockquote><p>\u8FD9\u91CC\u7684\u540C\u6B65\u5305\u62EC\u4E86\u4F7F\u7528<code>volatile</code>\u3001<code>final</code>\u3001<code>synchronized</code>\u7B49\u5173\u952E\u5B57\u6765\u5B9E\u73B0<strong>\u591A\u7EBF\u7A0B\u4E0B\u7684\u540C\u6B65</strong>\u3002</p><p>\u5982\u679C\u7A0B\u5E8F\u5458\u6CA1\u6709\u6B63\u786E\u4F7F\u7528<code>volatile</code>\u3001<code>final</code>\u3001<code>synchronized</code>\uFF0C\u90A3\u4E48\u5373\u4FBF\u662F\u4F7F\u7528\u4E86\u540C\u6B65\uFF08\u5355\u7EBF\u7A0B\u4E0B\u7684\u540C\u6B65\uFF09\uFF0CJMM\u4E5F\u4E0D\u4F1A\u6709\u5185\u5B58\u53EF\u89C1\u6027\u7684\u4FDD\u8BC1\uFF0C\u53EF\u80FD\u4F1A\u5BFC\u81F4\u4F60\u7684\u7A0B\u5E8F\u51FA\u9519\uFF0C\u5E76\u4E14\u5177\u6709\u4E0D\u53EF\u91CD\u73B0\u6027\uFF0C\u5F88\u96BE\u6392\u67E5\u3002</p><p>\u6240\u4EE5\u5982\u4F55\u6B63\u786E\u4F7F\u7528<code>volatile</code>\u3001<code>final</code>\u3001<code>synchronized</code>\uFF0C\u662F\u7A0B\u5E8F\u5458\u5E94\u8BE5\u53BB\u4E86\u89E3\u7684\u3002\u540E\u9762\u4F1A\u6709\u4E13\u95E8\u7684\u7AE0\u8282\u4ECB\u7ECD\u8FD9\u51E0\u4E2A\u5173\u952E\u5B57\u7684\u5185\u5B58\u8BED\u4E49\u53CA\u4F7F\u7528\u3002</p><h3 id="\u987A\u5E8F\u4E00\u81F4\u6027\u6A21\u578B" tabindex="-1"><a class="header-anchor" href="#\u987A\u5E8F\u4E00\u81F4\u6027\u6A21\u578B" aria-hidden="true">#</a> \u987A\u5E8F\u4E00\u81F4\u6027\u6A21\u578B</h3><p>\u987A\u5E8F\u4E00\u81F4\u6027\u5185\u5B58\u6A21\u578B\u662F\u4E00\u4E2A<strong>\u7406\u60F3\u5316\u7684\u7406\u8BBA\u53C2\u8003\u6A21\u578B</strong>\uFF0C\u5B83\u4E3A\u7A0B\u5E8F\u5458\u63D0\u4F9B\u4E86\u6781\u5F3A\u7684\u5185\u5B58\u53EF\u89C1\u6027\u4FDD\u8BC1\u3002</p><p>\u987A\u5E8F\u4E00\u81F4\u6027\u6A21\u578B\u6709\u4E24\u5927\u7279\u6027\uFF1A</p><ul><li><p>\u4E00\u4E2A\u7EBF\u7A0B\u4E2D\u7684\u6240\u6709\u64CD\u4F5C\u5FC5\u987B\u6309\u7167\u7A0B\u5E8F\u7684\u987A\u5E8F\uFF08\u5373Java\u4EE3\u7801\u7684\u987A\u5E8F\uFF09\u6765\u6267\u884C\u3002</p></li><li><p>\u4E0D\u7BA1\u7A0B\u5E8F\u662F\u5426\u540C\u6B65\uFF0C\u6240\u6709\u7EBF\u7A0B\u90FD\u53EA\u80FD\u770B\u5230\u4E00\u4E2A\u5355\u4E00\u7684\u64CD\u4F5C\u6267\u884C\u987A\u5E8F\u3002\u5373\u5728\u987A\u5E8F\u4E00\u81F4\u6027\u6A21\u578B\u4E2D\uFF0C\u6BCF\u4E2A\u64CD\u4F5C\u5FC5\u987B\u662F<strong>\u539F\u5B50\u6027\u7684\uFF0C\u4E14\u7ACB\u523B\u5BF9\u6240\u6709\u7EBF\u7A0B\u53EF\u89C1</strong>\u3002</p></li></ul><p>\u4E3A\u4E86\u7406\u89E3\u8FD9\u4E24\u4E2A\u7279\u6027\uFF0C\u6211\u4EEC\u4E3E\u4E2A\u4F8B\u5B50\uFF0C\u5047\u8BBE\u6709\u4E24\u4E2A\u7EBF\u7A0BA\u548CB\u5E76\u53D1\u6267\u884C\uFF0C\u7EBF\u7A0BA\u67093\u4E2A\u64CD\u4F5C\uFF0C\u4ED6\u4EEC\u5728\u7A0B\u5E8F\u4E2D\u7684\u987A\u5E8F\u662FA1-&gt;A2-&gt;A3\uFF0C\u7EBF\u7A0BB\u4E5F\u67093\u4E2A\u64CD\u4F5C\uFF0CB1-&gt;B2-&gt;B3\u3002</p><p>\u5047\u8BBE<strong>\u6B63\u786E\u4F7F\u7528\u4E86\u540C\u6B65</strong>\uFF0CA\u7EBF\u7A0B\u76843\u4E2A\u64CD\u4F5C\u6267\u884C\u540E\u91CA\u653E\u9501\uFF0CB\u7EBF\u7A0B\u83B7\u53D6\u540C\u4E00\u4E2A\u9501\u3002\u90A3\u4E48\u5728<strong>\u987A\u5E8F\u4E00\u81F4\u6027\u6A21\u578B</strong>\u4E2D\u7684\u6267\u884C\u6548\u679C\u5982\u4E0B\u6240\u793A\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/jmm-9ce5973e-6100-41e6-96b8-29ddb738e7f8.png" alt="\u6B63\u786E\u540C\u6B65\u56FE"></p><p>\u64CD\u4F5C\u7684\u6267\u884C\u6574\u4F53\u4E0A\u6709\u5E8F\uFF0C\u5E76\u4E14\u4E24\u4E2A\u7EBF\u7A0B\u90FD\u53EA\u80FD\u770B\u5230\u8FD9\u4E2A\u6267\u884C\u987A\u5E8F\u3002</p><p>\u5047\u8BBE<strong>\u6CA1\u6709\u4F7F\u7528\u540C\u6B65</strong>\uFF0C\u90A3\u4E48\u5728<strong>\u987A\u5E8F\u4E00\u81F4\u6027\u6A21\u578B</strong>\u4E2D\u7684\u6267\u884C\u6548\u679C\u5982\u4E0B\u6240\u793A\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/jmm-6357c025-a6e0-4c89-939d-040e549fac12.png" alt="\u6CA1\u6709\u6B63\u786E\u540C\u6B65\u56FE"></p><p>\u64CD\u4F5C\u7684\u6267\u884C\u6574\u4F53\u4E0A\u65E0\u5E8F\uFF0C\u4F46\u662F\u4E24\u4E2A\u7EBF\u7A0B\u90FD\u53EA\u80FD\u770B\u5230\u8FD9\u4E2A\u6267\u884C\u987A\u5E8F\u3002\u4E4B\u6240\u4EE5\u53EF\u4EE5\u5F97\u5230\u8FD9\u4E2A\u4FDD\u8BC1\uFF0C\u662F\u56E0\u4E3A\u987A\u5E8F\u4E00\u81F4\u6027\u6A21\u578B\u4E2D\u7684<strong>\u6BCF\u4E2A\u64CD\u4F5C\u5FC5\u987B\u7ACB\u5373\u5BF9\u4EFB\u610F\u7EBF\u7A0B\u53EF\u89C1</strong>\u3002</p><p><strong>\u4F46\u662FJMM\u6CA1\u6709\u8FD9\u6837\u7684\u4FDD\u8BC1\u3002</strong></p><p>\u6BD4\u5982\uFF0C\u5728\u5F53\u524D\u7EBF\u7A0B\u628A\u5199\u8FC7\u7684\u6570\u636E\u7F13\u5B58\u5728\u672C\u5730\u5185\u5B58\u4E2D\uFF0C\u5728\u6CA1\u6709\u5237\u65B0\u5230\u4E3B\u5185\u5B58\u4E4B\u524D\uFF0C\u8FD9\u4E2A\u5199\u64CD\u4F5C\u4EC5\u5BF9\u5F53\u524D\u7EBF\u7A0B\u53EF\u89C1\uFF1B\u4ECE\u5176\u4ED6\u7EBF\u7A0B\u7684\u89D2\u5EA6\u6765\u89C2\u5BDF\uFF0C\u8FD9\u4E2A\u5199\u64CD\u4F5C\u6839\u672C\u6CA1\u6709\u88AB\u5F53\u524D\u7EBF\u7A0B\u6240\u6267\u884C\u3002\u53EA\u6709\u5F53\u524D\u7EBF\u7A0B\u628A\u672C\u5730\u5185\u5B58\u4E2D\u5199\u8FC7\u7684\u6570\u636E\u5237\u65B0\u5230\u4E3B\u5185\u5B58\u4E4B\u540E\uFF0C\u8FD9\u4E2A\u5199\u64CD\u4F5C\u624D\u5BF9\u5176\u4ED6\u7EBF\u7A0B\u53EF\u89C1\u3002\u5728\u8FD9\u79CD\u60C5\u51B5\u4E0B\uFF0C\u5F53\u524D\u7EBF\u7A0B\u548C\u5176\u4ED6\u7EBF\u7A0B\u770B\u5230\u7684\u6267\u884C\u987A\u5E8F\u662F\u4E0D\u4E00\u6837\u7684\u3002</p><h3 id="jmm\u4E2D\u540C\u6B65\u7A0B\u5E8F\u7684\u987A\u5E8F\u4E00\u81F4\u6027\u6548\u679C" tabindex="-1"><a class="header-anchor" href="#jmm\u4E2D\u540C\u6B65\u7A0B\u5E8F\u7684\u987A\u5E8F\u4E00\u81F4\u6027\u6548\u679C" aria-hidden="true">#</a> JMM\u4E2D\u540C\u6B65\u7A0B\u5E8F\u7684\u987A\u5E8F\u4E00\u81F4\u6027\u6548\u679C</h3><p>\u5728\u987A\u5E8F\u4E00\u81F4\u6027\u6A21\u578B\u4E2D\uFF0C\u6240\u6709\u64CD\u4F5C\u5B8C\u5168\u6309\u7167\u7A0B\u5E8F\u7684\u987A\u5E8F\u4E32\u884C\u6267\u884C\u3002\u4F46\u662FJMM\u4E2D\uFF0C\u4E34\u754C\u533A\u5185\uFF08\u540C\u6B65\u5757\u6216\u540C\u6B65\u65B9\u6CD5\u4E2D\uFF09\u7684\u4EE3\u7801\u53EF\u4EE5\u53D1\u751F\u91CD\u6392\u5E8F\uFF08\u4F46\u4E0D\u5141\u8BB8\u4E34\u754C\u533A\u5185\u7684\u4EE3\u7801\u201C\u9003\u9038\u201D\u5230\u4E34\u754C\u533A\u4E4B\u5916\uFF0C\u56E0\u4E3A\u4F1A\u7834\u574F\u9501\u7684\u5185\u5B58\u8BED\u4E49\uFF09\u3002</p><p>\u867D\u7136\u7EBF\u7A0BA\u5728\u4E34\u754C\u533A\u505A\u4E86\u91CD\u6392\u5E8F\uFF0C\u4F46\u662F\u56E0\u4E3A\u9501\u7684\u7279\u6027\uFF0C\u7EBF\u7A0BB\u65E0\u6CD5\u89C2\u5BDF\u5230\u7EBF\u7A0BA\u5728\u4E34\u754C\u533A\u7684\u91CD\u6392\u5E8F\u3002\u8FD9\u79CD\u91CD\u6392\u5E8F\u65E2\u63D0\u9AD8\u4E86\u6267\u884C\u6548\u7387\uFF0C\u53C8\u6CA1\u6709\u6539\u53D8\u7A0B\u5E8F\u7684\u6267\u884C\u7ED3\u679C\u3002</p><p>\u540C\u65F6\uFF0CJMM\u4F1A\u5728\u9000\u51FA\u4E34\u754C\u533A\u548C\u8FDB\u5165\u4E34\u754C\u533A\u505A\u7279\u6B8A\u7684\u5904\u7406\uFF0C\u4F7F\u5F97\u5728\u4E34\u754C\u533A\u5185\u7A0B\u5E8F\u83B7\u5F97\u4E0E\u987A\u5E8F\u4E00\u81F4\u6027\u6A21\u578B\u76F8\u540C\u7684\u5185\u5B58\u89C6\u56FE\u3002</p><p><strong>\u7531\u6B64\u53EF\u89C1\uFF0CJMM\u7684\u5177\u4F53\u5B9E\u73B0\u65B9\u9488\u662F\uFF1A\u5728\u4E0D\u6539\u53D8\uFF08\u6B63\u786E\u540C\u6B65\u7684\uFF09\u7A0B\u5E8F\u6267\u884C\u7ED3\u679C\u7684\u524D\u63D0\u4E0B\uFF0C\u5C3D\u91CF\u4E3A\u7F16\u8BD1\u671F\u548C\u5904\u7406\u5668\u7684\u4F18\u5316\u6253\u5F00\u65B9\u4FBF\u4E4B\u95E8</strong>\u3002</p><h3 id="jmm\u4E2D\u672A\u540C\u6B65\u7A0B\u5E8F\u7684\u987A\u5E8F\u4E00\u81F4\u6027\u6548\u679C" tabindex="-1"><a class="header-anchor" href="#jmm\u4E2D\u672A\u540C\u6B65\u7A0B\u5E8F\u7684\u987A\u5E8F\u4E00\u81F4\u6027\u6548\u679C" aria-hidden="true">#</a> JMM\u4E2D\u672A\u540C\u6B65\u7A0B\u5E8F\u7684\u987A\u5E8F\u4E00\u81F4\u6027\u6548\u679C</h3><p>\u5BF9\u4E8E\u672A\u540C\u6B65\u7684\u591A\u7EBF\u7A0B\u7A0B\u5E8F\uFF0CJMM\u53EA\u63D0\u4F9B<strong>\u6700\u5C0F\u5B89\u5168\u6027</strong>\uFF1A\u7EBF\u7A0B\u8BFB\u53D6\u5230\u7684\u503C\uFF0C\u8981\u4E48\u662F\u4E4B\u524D\u67D0\u4E2A\u7EBF\u7A0B\u5199\u5165\u7684\u503C\uFF0C\u8981\u4E48\u662F\u9ED8\u8BA4\u503C\uFF0C\u4E0D\u4F1A\u65E0\u4E2D\u751F\u6709\u3002</p><p>\u4E3A\u4E86\u5B9E\u73B0\u8FD9\u4E2A\u5B89\u5168\u6027\uFF0CJVM\u5728\u5806\u4E0A\u5206\u914D\u5BF9\u8C61\u65F6\uFF0C\u9996\u5148\u4F1A\u5BF9\u5185\u5B58\u7A7A\u95F4\u6E05\u96F6\uFF0C\u7136\u540E\u624D\u4F1A\u5728\u4E0A\u9762\u5206\u914D\u5BF9\u8C61\uFF08\u8FD9\u4E24\u4E2A\u64CD\u4F5C\u662F\u540C\u6B65\u7684\uFF09\u3002</p><p><strong>JMM\u6CA1\u6709\u4FDD\u8BC1\u672A\u540C\u6B65\u7A0B\u5E8F\u7684\u6267\u884C\u7ED3\u679C\u4E0E\u8BE5\u7A0B\u5E8F\u5728\u987A\u5E8F\u4E00\u81F4\u6027\u4E2D\u6267\u884C\u7ED3\u679C\u4E00\u81F4\u3002\u56E0\u4E3A\u5982\u679C\u8981\u4FDD\u8BC1\u6267\u884C\u7ED3\u679C\u4E00\u81F4\uFF0C\u90A3\u4E48JMM\u9700\u8981\u7981\u6B62\u5927\u91CF\u7684\u4F18\u5316\uFF0C\u5BF9\u7A0B\u5E8F\u7684\u6267\u884C\u6027\u80FD\u4F1A\u4EA7\u751F\u5F88\u5927\u7684\u5F71\u54CD\u3002</strong></p><p>\u672A\u540C\u6B65\u7A0B\u5E8F\u5728JMM\u548C\u987A\u5E8F\u4E00\u81F4\u6027\u5185\u5B58\u6A21\u578B\u4E2D\u7684\u6267\u884C\u7279\u6027\u6709\u5982\u4E0B\u5DEE\u5F02\uFF1A</p><ol><li>\u987A\u5E8F\u4E00\u81F4\u6027\u4FDD\u8BC1\u5355\u7EBF\u7A0B\u5185\u7684\u64CD\u4F5C\u4F1A\u6309\u7A0B\u5E8F\u7684\u987A\u5E8F\u6267\u884C\uFF1BJMM\u4E0D\u4FDD\u8BC1\u5355\u7EBF\u7A0B\u5185\u7684\u64CD\u4F5C\u4F1A\u6309\u7A0B\u5E8F\u7684\u987A\u5E8F\u6267\u884C\u3002\uFF08\u56E0\u4E3A\u91CD\u6392\u5E8F\uFF0C\u4F46\u662FJMM\u4FDD\u8BC1\u5355\u7EBF\u7A0B\u4E0B\u7684\u91CD\u6392\u5E8F\u4E0D\u5F71\u54CD\u6267\u884C\u7ED3\u679C\uFF09</li><li>\u987A\u5E8F\u4E00\u81F4\u6027\u6A21\u578B\u4FDD\u8BC1\u6240\u6709\u7EBF\u7A0B\u53EA\u80FD\u770B\u5230\u4E00\u81F4\u7684\u64CD\u4F5C\u6267\u884C\u987A\u5E8F\uFF0C\u800CJMM\u4E0D\u4FDD\u8BC1\u6240\u6709\u7EBF\u7A0B\u80FD\u770B\u5230\u4E00\u81F4\u7684\u64CD\u4F5C\u6267\u884C\u987A\u5E8F\u3002\uFF08\u56E0\u4E3AJMM\u4E0D\u4FDD\u8BC1\u6240\u6709\u64CD\u4F5C\u7ACB\u5373\u53EF\u89C1\uFF09</li><li>\u987A\u5E8F\u4E00\u81F4\u6027\u6A21\u578B\u4FDD\u8BC1\u5BF9\u6240\u6709\u7684\u5185\u5B58\u8BFB\u5199\u64CD\u4F5C\u90FD\u5177\u6709\u539F\u5B50\u6027\uFF0C\u800CJMM\u4E0D\u4FDD\u8BC1\u5BF964\u4F4D\u7684long\u578B\u548Cdouble\u578B\u53D8\u91CF\u7684\u5199\u64CD\u4F5C\u5177\u6709\u539F\u5B50\u6027\u3002</li></ol><h2 id="happens-before" tabindex="-1"><a class="header-anchor" href="#happens-before" aria-hidden="true">#</a> happens-before</h2><h3 id="\u4EC0\u4E48\u662Fhappens-before" tabindex="-1"><a class="header-anchor" href="#\u4EC0\u4E48\u662Fhappens-before" aria-hidden="true">#</a> \u4EC0\u4E48\u662Fhappens-before?</h3><p>\u4E00\u65B9\u9762\uFF0C\u7A0B\u5E8F\u5458\u9700\u8981JMM\u63D0\u4F9B\u4E00\u4E2A\u5F3A\u7684\u5185\u5B58\u6A21\u578B\u6765\u7F16\u5199\u4EE3\u7801\uFF1B\u53E6\u4E00\u65B9\u9762\uFF0C\u7F16\u8BD1\u5668\u548C\u5904\u7406\u5668\u5E0C\u671BJMM\u5BF9\u5B83\u4EEC\u7684\u675F\u7F1A\u8D8A\u5C11\u8D8A\u597D\uFF0C\u8FD9\u6837\u5B83\u4EEC\u5C31\u53EF\u4EE5\u6700\u53EF\u80FD\u591A\u7684\u505A\u4F18\u5316\u6765\u63D0\u9AD8\u6027\u80FD\uFF0C\u5E0C\u671B\u7684\u662F\u4E00\u4E2A\u5F31\u7684\u5185\u5B58\u6A21\u578B\u3002</p><p>JMM\u8003\u8651\u4E86\u8FD9\u4E24\u79CD\u9700\u6C42\uFF0C\u5E76\u4E14\u627E\u5230\u4E86\u5E73\u8861\u70B9\uFF0C\u5BF9\u7F16\u8BD1\u5668\u548C\u5904\u7406\u5668\u6765\u8BF4\uFF0C<strong>\u53EA\u8981\u4E0D\u6539\u53D8\u7A0B\u5E8F\u7684\u6267\u884C\u7ED3\u679C\uFF08\u5355\u7EBF\u7A0B\u7A0B\u5E8F\u548C\u6B63\u786E\u540C\u6B65\u4E86\u7684\u591A\u7EBF\u7A0B\u7A0B\u5E8F\uFF09\uFF0C\u7F16\u8BD1\u5668\u548C\u5904\u7406\u5668\u600E\u4E48\u4F18\u5316\u90FD\u884C\u3002</strong></p><p>\u800C\u5BF9\u4E8E\u7A0B\u5E8F\u5458\uFF0CJMM\u63D0\u4F9B\u4E86<strong>happens-before\u89C4\u5219</strong>\uFF08JSR-133\u89C4\u8303\uFF09\uFF0C\u6EE1\u8DB3\u4E86\u7A0B\u5E8F\u5458\u7684\u9700\u6C42\u2014\u2014**\u7B80\u5355\u6613\u61C2\uFF0C\u5E76\u4E14\u63D0\u4F9B\u4E86\u8DB3\u591F\u5F3A\u7684\u5185\u5B58\u53EF\u89C1\u6027\u4FDD\u8BC1\u3002**\u6362\u8A00\u4E4B\uFF0C\u7A0B\u5E8F\u5458\u53EA\u8981\u9075\u5FAAhappens-before\u89C4\u5219\uFF0C\u90A3\u4ED6\u5199\u7684\u7A0B\u5E8F\u5C31\u80FD\u4FDD\u8BC1\u5728JMM\u4E2D\u5177\u6709\u5F3A\u7684\u5185\u5B58\u53EF\u89C1\u6027\u3002</p><p>JMM\u4F7F\u7528happens-before\u7684\u6982\u5FF5\u6765\u5B9A\u5236\u4E24\u4E2A\u64CD\u4F5C\u4E4B\u95F4\u7684\u6267\u884C\u987A\u5E8F\u3002\u8FD9\u4E24\u4E2A\u64CD\u4F5C\u53EF\u4EE5\u5728\u4E00\u4E2A\u7EBF\u7A0B\u4EE5\u5185\uFF0C\u4E5F\u53EF\u4EE5\u662F\u4E0D\u540C\u7684\u7EBF\u7A0B\u4E4B\u95F4\u3002\u56E0\u6B64\uFF0CJMM\u53EF\u4EE5\u901A\u8FC7happens-before\u5173\u7CFB\u5411\u7A0B\u5E8F\u5458\u63D0\u4F9B\u8DE8\u7EBF\u7A0B\u7684\u5185\u5B58\u53EF\u89C1\u6027\u4FDD\u8BC1\u3002</p><p>happens-before\u5173\u7CFB\u7684\u5B9A\u4E49\u5982\u4E0B\uFF1A</p><ol><li>\u5982\u679C\u4E00\u4E2A\u64CD\u4F5Chappens-before\u53E6\u4E00\u4E2A\u64CD\u4F5C\uFF0C\u90A3\u4E48\u7B2C\u4E00\u4E2A\u64CD\u4F5C\u7684\u6267\u884C\u7ED3\u679C\u5C06\u5BF9\u7B2C\u4E8C\u4E2A\u64CD\u4F5C\u53EF\u89C1\uFF0C\u800C\u4E14\u7B2C\u4E00\u4E2A\u64CD\u4F5C\u7684\u6267\u884C\u987A\u5E8F\u6392\u5728\u7B2C\u4E8C\u4E2A\u64CD\u4F5C\u4E4B\u524D\u3002</li><li><strong>\u4E24\u4E2A\u64CD\u4F5C\u4E4B\u95F4\u5B58\u5728happens-before\u5173\u7CFB\uFF0C\u5E76\u4E0D\u610F\u5473\u7740Java\u5E73\u53F0\u7684\u5177\u4F53\u5B9E\u73B0\u5FC5\u987B\u8981\u6309\u7167happens-before\u5173\u7CFB\u6307\u5B9A\u7684\u987A\u5E8F\u6765\u6267\u884C\u3002\u5982\u679C\u91CD\u6392\u5E8F\u4E4B\u540E\u7684\u6267\u884C\u7ED3\u679C\uFF0C\u4E0E\u6309happens-before\u5173\u7CFB\u6765\u6267\u884C\u7684\u7ED3\u679C\u4E00\u81F4\uFF0C\u90A3\u4E48JMM\u4E5F\u5141\u8BB8\u8FD9\u6837\u7684\u91CD\u6392\u5E8F\u3002</strong></li></ol><p>happens-before\u5173\u7CFB\u672C\u8D28\u4E0A\u548Cas-if-serial\u8BED\u4E49\u662F\u4E00\u56DE\u4E8B\u3002</p><p>as-if-serial\u8BED\u4E49\u4FDD\u8BC1\u5355\u7EBF\u7A0B\u5185\u91CD\u6392\u5E8F\u540E\u7684\u6267\u884C\u7ED3\u679C\u548C\u7A0B\u5E8F\u4EE3\u7801\u672C\u8EAB\u5E94\u6709\u7684\u7ED3\u679C\u662F\u4E00\u81F4\u7684\uFF0Chappens-before\u5173\u7CFB\u4FDD\u8BC1\u6B63\u786E\u540C\u6B65\u7684\u591A\u7EBF\u7A0B\u7A0B\u5E8F\u7684\u6267\u884C\u7ED3\u679C\u4E0D\u88AB\u91CD\u6392\u5E8F\u6539\u53D8\u3002</p><p>\u603B\u4E4B\uFF0C<strong>\u5982\u679C\u64CD\u4F5CA happens-before\u64CD\u4F5CB\uFF0C\u90A3\u4E48\u64CD\u4F5CA\u5728\u5185\u5B58\u4E0A\u6240\u505A\u7684\u64CD\u4F5C\u5BF9\u64CD\u4F5CB\u90FD\u662F\u53EF\u89C1\u7684\uFF0C\u4E0D\u7BA1\u5B83\u4EEC\u5728\u4E0D\u5728\u4E00\u4E2A\u7EBF\u7A0B\u3002</strong></p><h3 id="\u5929\u7136\u7684happens-before\u5173\u7CFB" tabindex="-1"><a class="header-anchor" href="#\u5929\u7136\u7684happens-before\u5173\u7CFB" aria-hidden="true">#</a> \u5929\u7136\u7684happens-before\u5173\u7CFB</h3><p>\u5728Java\u4E2D\uFF0C\u6709\u4EE5\u4E0B\u5929\u7136\u7684happens-before\u5173\u7CFB\uFF1A</p><ul><li>\u7A0B\u5E8F\u987A\u5E8F\u89C4\u5219\uFF1A\u4E00\u4E2A\u7EBF\u7A0B\u4E2D\u7684\u6BCF\u4E00\u4E2A\u64CD\u4F5C\uFF0Chappens-before\u4E8E\u8BE5\u7EBF\u7A0B\u4E2D\u7684\u4EFB\u610F\u540E\u7EED\u64CD\u4F5C\u3002</li><li>\u76D1\u89C6\u5668\u9501\u89C4\u5219\uFF1A\u5BF9\u4E00\u4E2A\u9501\u7684\u89E3\u9501\uFF0Chappens-before\u4E8E\u968F\u540E\u5BF9\u8FD9\u4E2A\u9501\u7684\u52A0\u9501\u3002</li><li>volatile\u53D8\u91CF\u89C4\u5219\uFF1A\u5BF9\u4E00\u4E2Avolatile\u57DF\u7684\u5199\uFF0Chappens-before\u4E8E\u4EFB\u610F\u540E\u7EED\u5BF9\u8FD9\u4E2Avolatile\u57DF\u7684\u8BFB\u3002</li><li>\u4F20\u9012\u6027\uFF1A\u5982\u679CA happens-before B\uFF0C\u4E14B happens-before C\uFF0C\u90A3\u4E48A happens-before C\u3002</li><li>start\u89C4\u5219\uFF1A\u5982\u679C\u7EBF\u7A0BA\u6267\u884C\u64CD\u4F5CThreadB.start()\u542F\u52A8\u7EBF\u7A0BB\uFF0C\u90A3\u4E48A\u7EBF\u7A0B\u7684ThreadB.start\uFF08\uFF09\u64CD\u4F5Chappens-before\u4E8E\u7EBF\u7A0BB\u4E2D\u7684\u4EFB\u610F\u64CD\u4F5C\u3001</li><li>join\u89C4\u5219\uFF1A\u5982\u679C\u7EBF\u7A0BA\u6267\u884C\u64CD\u4F5CThreadB.join\uFF08\uFF09\u5E76\u6210\u529F\u8FD4\u56DE\uFF0C\u90A3\u4E48\u7EBF\u7A0BB\u4E2D\u7684\u4EFB\u610F\u64CD\u4F5Chappens-before\u4E8E\u7EBF\u7A0BA\u4ECEThreadB.join()\u64CD\u4F5C\u6210\u529F\u8FD4\u56DE\u3002</li></ul><p>\u4E3E\u4F8B\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">int</span> a <span class="token operator">=</span> <span class="token number">1</span><span class="token punctuation">;</span> <span class="token comment">// A\u64CD\u4F5C</span>
 <span class="token keyword">int</span> b <span class="token operator">=</span> <span class="token number">2</span><span class="token punctuation">;</span> <span class="token comment">// B\u64CD\u4F5C</span>
diff --git a/dist/assets/join.html.18a0e9f8.js b/dist/assets/join.html.50d59b6e.js
similarity index 99%
rename from dist/assets/join.html.18a0e9f8.js
rename to dist/assets/join.html.50d59b6e.js
index 926e2c8e..0194f43a 100644
--- a/dist/assets/join.html.18a0e9f8.js
+++ b/dist/assets/join.html.50d59b6e.js
@@ -1,4 +1,4 @@
-import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e as p}from"./app.a0271b9c.js";const t={},e=p(`<h1 id="java\u5B57\u7B26\u4E32\u62FC\u63A5\u7684\u51E0\u79CD\u65B9\u5F0F" tabindex="-1"><a class="header-anchor" href="#java\u5B57\u7B26\u4E32\u62FC\u63A5\u7684\u51E0\u79CD\u65B9\u5F0F" aria-hidden="true">#</a> Java\u5B57\u7B26\u4E32\u62FC\u63A5\u7684\u51E0\u79CD\u65B9\u5F0F</h1><p>\u201C\u54E5\uFF0C\u4F60\u8BA9\u6211\u770B\u7684\u300AJava \u5F00\u53D1\u624B\u518C\u300B\u4E0A\u6709\u8FD9\u4E48\u4E00\u6BB5\u5185\u5BB9\uFF1A\u5FAA\u73AF\u4F53\u5185\uFF0C\u62FC\u63A5\u5B57\u7B26\u4E32\u6700\u597D\u4F7F\u7528 StringBuilder \u7684 <code>append()</code> \u65B9\u6CD5\uFF0C\u800C\u4E0D\u662F + \u53F7\u64CD\u4F5C\u7B26\u3002\u8FD9\u662F\u4E3A\u4EC0\u4E48\u5440\uFF1F\u201D\u4E09\u59B9\u7591\u60D1\u5730\u95EE\u3002</p><p>\u201C\u597D\u7684\uFF0C\u4E09\u59B9\uFF0C\u54E5\u6765\u6162\u6162\u7ED9\u4F60\u8BB2\u3002\u201D\u6211\u56DE\u7B54\u3002</p><p>\u4E09\u59B9\u80FD\u5728\u5B66\u4E60\u7684\u8FC7\u7A0B\u4E2D\u4E0D\u65AD\u5730\u53D1\u73B0\u95EE\u9898\uFF0C\u8BA9\u6211\u611F\u5230\u975E\u5E38\u7684\u5F00\u5FC3\u3002\u5176\u5B9E\u5F88\u591A\u65F6\u5019\uFF0C\u6211\u4EEC\u4E0D\u5E94\u8BE5\u53EA\u662F\u628A\u77E5\u8BC6\u70B9\u8BB0\u5728\u5FC3\u91CC\uFF0C\u8FD8\u5E94\u8BE5\u95EE\u4E00\u95EE\u81EA\u5DF1\uFF0C\u5230\u5E95\u662F\u4E3A\u4EC0\u4E48\uFF0C\u53EA\u6709\u8FC8\u51FA\u53BB\u8FD9\u4E00\u6B65\uFF0C\u624D\u80FD\u771F\u6B63\u7684\u6210\u957F\u8D77\u6765\u3002</p><p>\u201C+ \u53F7\u64CD\u4F5C\u7B26\u5176\u5B9E\u88AB Java \u5728\u7F16\u8BD1\u7684\u65F6\u5019\u91CD\u65B0\u89E3\u91CA\u4E86\uFF0C\u6362\u4E00\u79CD\u8BF4\u6CD5\u5C31\u662F\uFF0C+ \u53F7\u64CD\u4F5C\u7B26\u662F\u4E00\u79CD\u8BED\u6CD5\u7CD6\uFF0C\u8BA9\u5B57\u7B26\u4E32\u7684\u62FC\u63A5\u53D8\u5F97\u66F4\u7B80\u4FBF\u4E86\u3002\u201D\u4E00\u8FB9\u7ED9\u4E09\u59B9\u89E3\u91CA\uFF0C\u6211\u4E00\u8FB9\u5728 Intellij IDEA \u4E2D\u6572\u51FA\u4E86\u4E0B\u9762\u8FD9\u6BB5\u4EE3\u7801\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">class</span> <span class="token class-name">Demo</span> <span class="token punctuation">{</span>
+import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e as p}from"./app.615e41d8.js";const t={},e=p(`<h1 id="java\u5B57\u7B26\u4E32\u62FC\u63A5\u7684\u51E0\u79CD\u65B9\u5F0F" tabindex="-1"><a class="header-anchor" href="#java\u5B57\u7B26\u4E32\u62FC\u63A5\u7684\u51E0\u79CD\u65B9\u5F0F" aria-hidden="true">#</a> Java\u5B57\u7B26\u4E32\u62FC\u63A5\u7684\u51E0\u79CD\u65B9\u5F0F</h1><p>\u201C\u54E5\uFF0C\u4F60\u8BA9\u6211\u770B\u7684\u300AJava \u5F00\u53D1\u624B\u518C\u300B\u4E0A\u6709\u8FD9\u4E48\u4E00\u6BB5\u5185\u5BB9\uFF1A\u5FAA\u73AF\u4F53\u5185\uFF0C\u62FC\u63A5\u5B57\u7B26\u4E32\u6700\u597D\u4F7F\u7528 StringBuilder \u7684 <code>append()</code> \u65B9\u6CD5\uFF0C\u800C\u4E0D\u662F + \u53F7\u64CD\u4F5C\u7B26\u3002\u8FD9\u662F\u4E3A\u4EC0\u4E48\u5440\uFF1F\u201D\u4E09\u59B9\u7591\u60D1\u5730\u95EE\u3002</p><p>\u201C\u597D\u7684\uFF0C\u4E09\u59B9\uFF0C\u54E5\u6765\u6162\u6162\u7ED9\u4F60\u8BB2\u3002\u201D\u6211\u56DE\u7B54\u3002</p><p>\u4E09\u59B9\u80FD\u5728\u5B66\u4E60\u7684\u8FC7\u7A0B\u4E2D\u4E0D\u65AD\u5730\u53D1\u73B0\u95EE\u9898\uFF0C\u8BA9\u6211\u611F\u5230\u975E\u5E38\u7684\u5F00\u5FC3\u3002\u5176\u5B9E\u5F88\u591A\u65F6\u5019\uFF0C\u6211\u4EEC\u4E0D\u5E94\u8BE5\u53EA\u662F\u628A\u77E5\u8BC6\u70B9\u8BB0\u5728\u5FC3\u91CC\uFF0C\u8FD8\u5E94\u8BE5\u95EE\u4E00\u95EE\u81EA\u5DF1\uFF0C\u5230\u5E95\u662F\u4E3A\u4EC0\u4E48\uFF0C\u53EA\u6709\u8FC8\u51FA\u53BB\u8FD9\u4E00\u6B65\uFF0C\u624D\u80FD\u771F\u6B63\u7684\u6210\u957F\u8D77\u6765\u3002</p><p>\u201C+ \u53F7\u64CD\u4F5C\u7B26\u5176\u5B9E\u88AB Java \u5728\u7F16\u8BD1\u7684\u65F6\u5019\u91CD\u65B0\u89E3\u91CA\u4E86\uFF0C\u6362\u4E00\u79CD\u8BF4\u6CD5\u5C31\u662F\uFF0C+ \u53F7\u64CD\u4F5C\u7B26\u662F\u4E00\u79CD\u8BED\u6CD5\u7CD6\uFF0C\u8BA9\u5B57\u7B26\u4E32\u7684\u62FC\u63A5\u53D8\u5F97\u66F4\u7B80\u4FBF\u4E86\u3002\u201D\u4E00\u8FB9\u7ED9\u4E09\u59B9\u89E3\u91CA\uFF0C\u6211\u4E00\u8FB9\u5728 Intellij IDEA \u4E2D\u6572\u51FA\u4E86\u4E0B\u9762\u8FD9\u6BB5\u4EE3\u7801\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">class</span> <span class="token class-name">Demo</span> <span class="token punctuation">{</span>
     <span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">void</span> <span class="token function">main</span><span class="token punctuation">(</span><span class="token class-name">String</span><span class="token punctuation">[</span><span class="token punctuation">]</span> args<span class="token punctuation">)</span> <span class="token punctuation">{</span>
         <span class="token class-name">String</span> chenmo <span class="token operator">=</span> <span class="token string">&quot;\u6C89\u9ED8&quot;</span><span class="token punctuation">;</span>
         <span class="token class-name">String</span> wanger <span class="token operator">=</span> <span class="token string">&quot;\u738B\u4E8C&quot;</span><span class="token punctuation">;</span>
diff --git a/dist/assets/jpa.html.8adce5f1.js b/dist/assets/jpa.html.c491ef74.js
similarity index 88%
rename from dist/assets/jpa.html.8adce5f1.js
rename to dist/assets/jpa.html.c491ef74.js
index ce80666d..8975591f 100644
--- a/dist/assets/jpa.html.8adce5f1.js
+++ b/dist/assets/jpa.html.c491ef74.js
@@ -1,4 +1,4 @@
-import{_ as c}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o as i,c as l,a as n,b as a,w as u,e as t,d as s}from"./app.a0271b9c.js";const r={},d=t(`<h3 id="spring-data-jpa-\u7B80\u4ECB" tabindex="-1"><a class="header-anchor" href="#spring-data-jpa-\u7B80\u4ECB" aria-hidden="true">#</a> Spring Data JPA \u7B80\u4ECB</h3><p>Spring Data \u662F Spring \u63D0\u4F9B\u7684\u4E00\u4E2A\u64CD\u4F5C\u6570\u636E\u7684\u6846\u67B6\uFF0CSpring Data JPA\u662F Spring Data \u4E0B\u7684\u4E00\u4E2A\u57FA\u4E8E JPA \u6807\u51C6\u7684\u64CD\u4F5C\u6570\u636E\u7684\u6A21\u5757\u3002</p><p>JPA\uFF08Java Persistence API\uFF09\u662F Java \u4EB2\u5988 Sun \u516C\u53F8\u63D0\u51FA\u7684\u4E00\u5957 Java \u6301\u4E45\u5316\u89C4\u8303\u3002\u6240\u8C13\u89C4\u8303\uFF0C\u5C31\u662F\u53EA\u5B9A\u4E49\u6807\u51C6\uFF0C\u4E0D\u63D0\u4F9B\u5B9E\u73B0\u3002</p><p>JPA \u7684\u63D0\u51FA\u4E3B\u8981\u662F\u4E3A\u4E86\u6574\u5408\u5E02\u9762\u4E0A\u5DF2\u6709\u7684 ORM \u6846\u67B6\uFF0C\u6BD4\u5982\u8BF4 Hibernate\u3001EclipseLink \u7B49\u3002\u5B98\u65B9\u89C9\u5F97\u4F60\u4EEC\u641E\u6846\u67B6\u53EF\u4EE5\uFF0C\u4F46\u4E0D\u8981\u4E71\u641E\uFF0C\u5F97\u6309\u7167\u6211\u7684\u6807\u51C6\u6765\u3002</p><p>Spring Data JPA \u53EA\u662F\u4E00\u4E2A\u62BD\u8C61\u5C42\uFF0C\u5B83\u4E0A\u63A5 JPA \u4E0B\u63A5 ORM \u6846\u67B6\uFF0C\u901A\u8FC7\u57FA\u4E8E JPA \u7684 Respository \u63A5\u53E3\u6781\u5927\u5730\u51CF\u5C11\u4E86 JPA \u4F5C\u4E3A\u6570\u636E\u8BBF\u95EE\u65B9\u6848\u7684\u4EE3\u7801\u91CF\uFF0C\u7B80\u5316\u4E86\u6301\u4E45\u5C42\u5F00\u53D1\u5E76\u4E14\u5C4F\u853D\u4E86\u5404\u5927 ORM \u6846\u67B6\u7684\u5DEE\u5F02\u3002</p><p>\u603B\u7ED3\u4E00\u4E0B\u5C31\u662F\uFF1A</p><ul><li>JPA \u662F\u89C4\u8303\uFF0C\u7EDF\u4E00\u4E86\u89C4\u8303\u624D\u4FBF\u4E8E\u4F7F\u7528\u3002</li><li>Hibernate \u662F JPA \u7684\u5B9E\u73B0\uFF0C\u662F\u4E00\u5957\u6210\u719F\u7684 ORM \u6846\u67B6\u3002</li><li>Spring Data JPA \u662F Spring \u63D0\u51FA\u7684\uFF0C\u5B83\u589E\u52A0\u4E86\u4E00\u4E2A\u62BD\u8C61\u5C42\uFF0C\u7528\u6765\u5C4F\u853D\u4E0D\u540C ORM \u6846\u67B6\u7684\u5DEE\u5F02\u3002</li></ul><h3 id="spring-boot-\u6574\u5408-spring-data-jpa" tabindex="-1"><a class="header-anchor" href="#spring-boot-\u6574\u5408-spring-data-jpa" aria-hidden="true">#</a> Spring Boot \u6574\u5408 Spring Data JPA</h3><p>\u7B2C\u4E00\u6B65\uFF0C\u5728 pom.xml \u6587\u4EF6\u4E2D\u6DFB\u52A0 JPA \u7684 starter \u4F9D\u8D56\u3002</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
+import{_ as p}from"./plugin-vue_export-helper.21dcd24c.js";import{r as o,o as c,c as i,a as n,b as e,e as t,d as s}from"./app.615e41d8.js";const l={},u=t(`<h2 id="spring-data-jpa-\u7B80\u4ECB" tabindex="-1"><a class="header-anchor" href="#spring-data-jpa-\u7B80\u4ECB" aria-hidden="true">#</a> Spring Data JPA \u7B80\u4ECB</h2><p>Spring Data \u662F Spring \u63D0\u4F9B\u7684\u4E00\u4E2A\u64CD\u4F5C\u6570\u636E\u7684\u6846\u67B6\uFF0CSpring Data JPA\u662F Spring Data \u4E0B\u7684\u4E00\u4E2A\u57FA\u4E8E JPA \u6807\u51C6\u7684\u64CD\u4F5C\u6570\u636E\u7684\u6A21\u5757\u3002</p><p>JPA\uFF08Java Persistence API\uFF09\u662F Java \u4EB2\u5988 Sun \u516C\u53F8\u63D0\u51FA\u7684\u4E00\u5957 Java \u6301\u4E45\u5316\u89C4\u8303\u3002\u6240\u8C13\u89C4\u8303\uFF0C\u5C31\u662F\u53EA\u5B9A\u4E49\u6807\u51C6\uFF0C\u4E0D\u63D0\u4F9B\u5B9E\u73B0\u3002</p><p>JPA \u7684\u63D0\u51FA\u4E3B\u8981\u662F\u4E3A\u4E86\u6574\u5408\u5E02\u9762\u4E0A\u5DF2\u6709\u7684 ORM \u6846\u67B6\uFF0C\u6BD4\u5982\u8BF4 Hibernate\u3001EclipseLink \u7B49\u3002\u5B98\u65B9\u89C9\u5F97\u4F60\u4EEC\u641E\u6846\u67B6\u53EF\u4EE5\uFF0C\u4F46\u4E0D\u8981\u4E71\u641E\uFF0C\u5F97\u6309\u7167\u6211\u7684\u6807\u51C6\u6765\u3002</p><p>Spring Data JPA \u53EA\u662F\u4E00\u4E2A\u62BD\u8C61\u5C42\uFF0C\u5B83\u4E0A\u63A5 JPA \u4E0B\u63A5 ORM \u6846\u67B6\uFF0C\u901A\u8FC7\u57FA\u4E8E JPA \u7684 Respository \u63A5\u53E3\u6781\u5927\u5730\u51CF\u5C11\u4E86 JPA \u4F5C\u4E3A\u6570\u636E\u8BBF\u95EE\u65B9\u6848\u7684\u4EE3\u7801\u91CF\uFF0C\u7B80\u5316\u4E86\u6301\u4E45\u5C42\u5F00\u53D1\u5E76\u4E14\u5C4F\u853D\u4E86\u5404\u5927 ORM \u6846\u67B6\u7684\u5DEE\u5F02\u3002</p><p>\u603B\u7ED3\u4E00\u4E0B\u5C31\u662F\uFF1A</p><ul><li>JPA \u662F\u89C4\u8303\uFF0C\u7EDF\u4E00\u4E86\u89C4\u8303\u624D\u4FBF\u4E8E\u4F7F\u7528\u3002</li><li>Hibernate \u662F JPA \u7684\u5B9E\u73B0\uFF0C\u662F\u4E00\u5957\u6210\u719F\u7684 ORM \u6846\u67B6\u3002</li><li>Spring Data JPA \u662F Spring \u63D0\u51FA\u7684\uFF0C\u5B83\u589E\u52A0\u4E86\u4E00\u4E2A\u62BD\u8C61\u5C42\uFF0C\u7528\u6765\u5C4F\u853D\u4E0D\u540C ORM \u6846\u67B6\u7684\u5DEE\u5F02\u3002</li></ul><h2 id="spring-boot-\u6574\u5408-spring-data-jpa" tabindex="-1"><a class="header-anchor" href="#spring-boot-\u6574\u5408-spring-data-jpa" aria-hidden="true">#</a> Spring Boot \u6574\u5408 Spring Data JPA</h2><p>\u7B2C\u4E00\u6B65\uFF0C\u5728 pom.xml \u6587\u4EF6\u4E2D\u6DFB\u52A0 JPA \u7684 starter \u4F9D\u8D56\u3002</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
     &lt;groupId&gt;org.springframework.boot&lt;/groupId&gt;
     &lt;artifactId&gt;spring-boot-starter-data-jpa&lt;/artifactId&gt;
 &lt;/dependency&gt;
@@ -17,7 +17,7 @@ import{_ as c}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o as i,
     <span class="token keyword">private</span> <span class="token class-name">String</span> name<span class="token punctuation">;</span>
     <span class="token keyword">private</span> <span class="token class-name">String</span> password<span class="token punctuation">;</span>
 <span class="token punctuation">}</span>
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><ul><li><code>@Data</code> \u6CE8\u89E3\u4E3A lombok \u6CE8\u89E3\uFF0C\u4F1A\u81EA\u52A8\u4E3A\u8BE5\u7C7B\u6DFB\u52A0 getter/setter \u65B9\u6CD5\u3002</li><li><code>@Entity</code> \u548C <code>@Table</code> \u6CE8\u89E3\u90FD\u662F JDK 1.5 \u4EE5\u540E\u5F15\u5165\u7684\u5143\u6570\u636E\u6CE8\u89E3\uFF0C\u9075\u5FAA JPA \u89C4\u8303\u4E2D\u5B9A\u4E49\u7684\u67E5\u8BE2\u8BED\u8A00 JPQL\uFF0C\u7C7B\u4F3C SQL \u8BED\u6CD5\uFF0C\u9002\u7528\u4E8E Java \u7C7B\u3002</li><li><code>@Entity</code> \u8868\u660E\u8BE5\u7C7B\u662F\u4E00\u4E2A\u5B9E\u4F53\u7C7B\uFF0C\u9ED8\u8BA4\u4F7F\u7528 ORM \u89C4\u5219\uFF0C\u5373\u7C7B\u540D\u4E3A\u6570\u636E\u5E93\u8868\u540D\uFF0C\u7C7B\u4E2D\u7684\u5B57\u6BB5\u540D\u4E3A\u6570\u636E\u5E93\u8868\u4E2D\u7684\u5B57\u6BB5\u540D\u3002</li><li><code>@Table</code> \u6CE8\u89E3\u662F\u975E\u5FC5\u9009\u9879\uFF0C\u5B83\u7684\u4F18\u5148\u7EA7\u9AD8\u4E8E <code>@Entity</code> \u6CE8\u89E3\uFF0C\u6BD4\u5982\u8BF4 <code>@Entity(name=&quot;user&quot;)</code> \u548C <code>@Table(name=&quot;users&quot;)</code> \u540C\u65F6\u5B58\u5728\u7684\u8BDD\uFF0C\u5BF9\u5E94\u7684\u8868\u540D\u4E3A users\u3002</li><li><code>@Id</code> \u8868\u540D\u8BE5\u5B57\u6BB5\u4E3A\u4E3B\u952E\u5B57\u6BB5\uFF0C\u5F53\u58F0\u660E\u4E86 @Entity \u6CE8\u89E3\uFF0C<code>@Id</code> \u5C31\u5FC5\u987B\u4E5F\u5F97\u58F0\u660E\u3002</li></ul><p>\u8FD9\u91CC\u63A8\u8350\u5927\u5BB6\u5728 Intellij IDEA \u4E2D\u5B89\u88C5 JPA Buddy \u63D2\u4EF6\uFF0C\u8BE5\u63D2\u4EF6\u63D0\u4F9B\u4E86\u53EF\u89C6\u5316\u7684\u4EE3\u7801\u751F\u6210\u5668\uFF0C\u53EF\u4EE5\u5E2E\u6211\u4EEC\u7B80\u5316 JPA \u7684\u5F00\u53D1\u5DE5\u4F5C\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/jpa-dbd461e0-f74b-4914-9f79-37c09bce8db4.png" alt=""></p><p>\u5B89\u88C5\u5B8C JPA Buddy \u63D2\u4EF6\u540E\uFF0C\u5F53\u6211\u4EEC\u521B\u5EFA\u597D\u5B9E\u4F53\u7C7B\u540E\uFF0C\u4F1A\u81EA\u52A8\u6253\u5F00\u4E09\u4E2A\u9762\u677F\uFF1AJPA Structure\uFF0CJPA Palette\u548CJPA Inspector\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/jpa-f8e43568-d286-4da6-a61a-c88b50642824.png" alt=""></p>`,19),k=s("\u66F4\u591A\u8BE6\u7EC6\u4ECB\u7ECD\uFF1A"),v={href:"https://codingdict.com/blog/1406",target:"_blank",rel:"noopener noreferrer"},m=s("https://codingdict.com/blog/1406"),g=t(`<p>\u5728JPA Buddy \u63D2\u4EF6\u7684\u5E2E\u52A9\u4E0B\uFF0C\u6211\u4EEC\u5176\u5B9E\u53EF\u4EE5\u76F4\u63A5\u5728\u9879\u76EE\u7684\u76EE\u5F55\u4E0A\u53F3\u952E\u9009\u62E9\u901A\u8FC7 JPA \u7684\u65B9\u5F0F\u521B\u5EFA\u5B9E\u4F53\u7C7B\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/jpa-ef1d4416-1ac5-4ad8-b305-dafd454cec3b.png" alt=""></p><p>\u9009\u62E9\u6570\u636E\u8868\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/jpa-64ad825d-2e53-4315-9fad-3d053d958303.png" alt=""></p><p>\u4EE3\u7801\u5982\u4E0B\u6240\u793A\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token annotation punctuation">@Entity</span>
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><ul><li><code>@Data</code> \u6CE8\u89E3\u4E3A lombok \u6CE8\u89E3\uFF0C\u4F1A\u81EA\u52A8\u4E3A\u8BE5\u7C7B\u6DFB\u52A0 getter/setter \u65B9\u6CD5\u3002</li><li><code>@Entity</code> \u548C <code>@Table</code> \u6CE8\u89E3\u90FD\u662F JDK 1.5 \u4EE5\u540E\u5F15\u5165\u7684\u5143\u6570\u636E\u6CE8\u89E3\uFF0C\u9075\u5FAA JPA \u89C4\u8303\u4E2D\u5B9A\u4E49\u7684\u67E5\u8BE2\u8BED\u8A00 JPQL\uFF0C\u7C7B\u4F3C SQL \u8BED\u6CD5\uFF0C\u9002\u7528\u4E8E Java \u7C7B\u3002</li><li><code>@Entity</code> \u8868\u660E\u8BE5\u7C7B\u662F\u4E00\u4E2A\u5B9E\u4F53\u7C7B\uFF0C\u9ED8\u8BA4\u4F7F\u7528 ORM \u89C4\u5219\uFF0C\u5373\u7C7B\u540D\u4E3A\u6570\u636E\u5E93\u8868\u540D\uFF0C\u7C7B\u4E2D\u7684\u5B57\u6BB5\u540D\u4E3A\u6570\u636E\u5E93\u8868\u4E2D\u7684\u5B57\u6BB5\u540D\u3002</li><li><code>@Table</code> \u6CE8\u89E3\u662F\u975E\u5FC5\u9009\u9879\uFF0C\u5B83\u7684\u4F18\u5148\u7EA7\u9AD8\u4E8E <code>@Entity</code> \u6CE8\u89E3\uFF0C\u6BD4\u5982\u8BF4 <code>@Entity(name=&quot;user&quot;)</code> \u548C <code>@Table(name=&quot;users&quot;)</code> \u540C\u65F6\u5B58\u5728\u7684\u8BDD\uFF0C\u5BF9\u5E94\u7684\u8868\u540D\u4E3A users\u3002</li><li><code>@Id</code> \u8868\u540D\u8BE5\u5B57\u6BB5\u4E3A\u4E3B\u952E\u5B57\u6BB5\uFF0C\u5F53\u58F0\u660E\u4E86 @Entity \u6CE8\u89E3\uFF0C<code>@Id</code> \u5C31\u5FC5\u987B\u4E5F\u5F97\u58F0\u660E\u3002</li></ul><p>\u8FD9\u91CC\u63A8\u8350\u5927\u5BB6\u5728 Intellij IDEA \u4E2D\u5B89\u88C5 JPA Buddy \u63D2\u4EF6\uFF0C\u8BE5\u63D2\u4EF6\u63D0\u4F9B\u4E86\u53EF\u89C6\u5316\u7684\u4EE3\u7801\u751F\u6210\u5668\uFF0C\u53EF\u4EE5\u5E2E\u6211\u4EEC\u7B80\u5316 JPA \u7684\u5F00\u53D1\u5DE5\u4F5C\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/jpa-dbd461e0-f74b-4914-9f79-37c09bce8db4.png" alt=""></p><p>\u5B89\u88C5\u5B8C JPA Buddy \u63D2\u4EF6\u540E\uFF0C\u5F53\u6211\u4EEC\u521B\u5EFA\u597D\u5B9E\u4F53\u7C7B\u540E\uFF0C\u4F1A\u81EA\u52A8\u6253\u5F00\u4E09\u4E2A\u9762\u677F\uFF1AJPA Structure\uFF0CJPA Palette\u548CJPA Inspector\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/jpa-f8e43568-d286-4da6-a61a-c88b50642824.png" alt=""></p>`,19),r=s("\u66F4\u591A\u8BE6\u7EC6\u4ECB\u7ECD\uFF1A"),d={href:"https://codingdict.com/blog/1406",target:"_blank",rel:"noopener noreferrer"},k=s("https://codingdict.com/blog/1406"),v=t(`<p>\u5728JPA Buddy \u63D2\u4EF6\u7684\u5E2E\u52A9\u4E0B\uFF0C\u6211\u4EEC\u5176\u5B9E\u53EF\u4EE5\u76F4\u63A5\u5728\u9879\u76EE\u7684\u76EE\u5F55\u4E0A\u53F3\u952E\u9009\u62E9\u901A\u8FC7 JPA \u7684\u65B9\u5F0F\u521B\u5EFA\u5B9E\u4F53\u7C7B\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/jpa-ef1d4416-1ac5-4ad8-b305-dafd454cec3b.png" alt=""></p><p>\u9009\u62E9\u6570\u636E\u8868\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/jpa-64ad825d-2e53-4315-9fad-3d053d958303.png" alt=""></p><p>\u4EE3\u7801\u5982\u4E0B\u6240\u793A\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token annotation punctuation">@Entity</span>
 <span class="token annotation punctuation">@Table</span><span class="token punctuation">(</span>name <span class="token operator">=</span> <span class="token string">&quot;user&quot;</span><span class="token punctuation">)</span>
 <span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">User</span> <span class="token punctuation">{</span>
     <span class="token annotation punctuation">@Id</span>
@@ -69,7 +69,7 @@ import{_ as c}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o as i,
         userRepository<span class="token punctuation">.</span><span class="token function">deleteById</span><span class="token punctuation">(</span>id<span class="token punctuation">)</span><span class="token punctuation">;</span>
     <span class="token punctuation">}</span>
 <span class="token punctuation">}</span>
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><ul><li><code>@Service</code> \u6CE8\u89E3\u7528\u5728\u670D\u52A1\u5C42\uFF0C\u548C <code>@Component</code> \u6CE8\u89E3\u4F5C\u7528\u7C7B\u4F3C\uFF08\u901A\u7528\u6CE8\u89E3\uFF09\uFF0CSpring Boot \u4F1A\u81EA\u52A8\u626B\u63CF\u8BE5\u7C7B\u6CE8\u89E3\u6CE8\u89E3\u7684\u7C7B\uFF0C\u5E76\u628A\u5B83\u4EEC\u5047\u5982\u5230 Spring \u5BB9\u5668\u4E2D\u3002</li><li><code>@Resource</code> \u548C <code>@Autowired</code> \u6CE8\u89E3\u90FD\u662F\u7528\u6765\u81EA\u52A8\u88C5\u914D\u5BF9\u8C61\u7684\uFF0C\u53EF\u4EE5\u7528\u5728\u5B57\u6BB5\u4E0A\uFF0C\u4E5F\u53EF\u4EE5\u7528\u5728 setter \u65B9\u6CD5\u4E0A\u3002@Autowired \u662F Spring \u63D0\u4F9B\u7684\u6CE8\u89E3\uFF0C@Resource \u662F Java \u63D0\u4F9B\u7684\u6CE8\u89E3\uFF0C\u4E5F\u5C31\u662F\u8BF4\uFF0C\u5982\u679C\u9879\u76EE\u6CA1\u6709\u4F7F\u7528 Spring \u6846\u67B6\u800C\u662F JFinal \u6846\u67B6\uFF0C@Resource \u6CE8\u89E3\u4E5F\u662F\u652F\u6301\u7684\u3002\u53E6\u5916\uFF0C@Resource \u662F byName \u81EA\u52A8\u88C5\u914D\uFF0C@Autowired \u662F byType \u81EA\u52A8\u88C5\u914D\uFF0C\u5F53\u6709\u4E24\u4E2A\u7C7B\u578B\u5B8C\u5168\u4E00\u6837\u7684\u5BF9\u8C61\u65F6\uFF0C@Autowired \u5C31\u4F1A\u51FA\u9519\u4E86\u3002</li></ul>`,18),b=s("\u82CF\u4E09\u5199\u4E86\u4E00\u7BC7@Autowired\u7684\u6587\u7AE0\uFF0C\u5F88\u4E0D\u9519\uFF1A"),f={href:"https://www.zhihu.com/question/39356740",target:"_blank",rel:"noopener noreferrer"},h=s("https://www.zhihu.com/question/39356740"),_=t(`<p>\u5F53\u7136\u4E86\uFF0C\u53EA\u662F\u7B80\u5355\u7684\u589E\u5220\u6539\u67E5\u5DF2\u7ECF\u4E0D\u80FD\u63D0\u8D77\u6211\u4EEC\u5B66\u4E60\u7684\u5174\u8DA3\u4E86\uFF0C\u5FC5\u987B\u5F97\u6765\u70B9\u4E0D\u4E00\u6837\u7684\uFF0C\u6240\u4EE5\u6211\u4EEC\u5728 UserService \u63A5\u53E3\u4E2D\u6DFB\u52A0\u4E00\u4E2A\u5206\u9875\u7684\u63A5\u53E3\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">Page</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">User</span><span class="token punctuation">&gt;</span></span> <span class="token function">findAll</span><span class="token punctuation">(</span><span class="token class-name">Pageable</span> pageable<span class="token punctuation">)</span><span class="token punctuation">;</span>
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><ul><li><code>@Service</code> \u6CE8\u89E3\u7528\u5728\u670D\u52A1\u5C42\uFF0C\u548C <code>@Component</code> \u6CE8\u89E3\u4F5C\u7528\u7C7B\u4F3C\uFF08\u901A\u7528\u6CE8\u89E3\uFF09\uFF0CSpring Boot \u4F1A\u81EA\u52A8\u626B\u63CF\u8BE5\u7C7B\u6CE8\u89E3\u6CE8\u89E3\u7684\u7C7B\uFF0C\u5E76\u628A\u5B83\u4EEC\u5047\u5982\u5230 Spring \u5BB9\u5668\u4E2D\u3002</li><li><code>@Resource</code> \u548C <code>@Autowired</code> \u6CE8\u89E3\u90FD\u662F\u7528\u6765\u81EA\u52A8\u88C5\u914D\u5BF9\u8C61\u7684\uFF0C\u53EF\u4EE5\u7528\u5728\u5B57\u6BB5\u4E0A\uFF0C\u4E5F\u53EF\u4EE5\u7528\u5728 setter \u65B9\u6CD5\u4E0A\u3002@Autowired \u662F Spring \u63D0\u4F9B\u7684\u6CE8\u89E3\uFF0C@Resource \u662F Java \u63D0\u4F9B\u7684\u6CE8\u89E3\uFF0C\u4E5F\u5C31\u662F\u8BF4\uFF0C\u5982\u679C\u9879\u76EE\u6CA1\u6709\u4F7F\u7528 Spring \u6846\u67B6\u800C\u662F JFinal \u6846\u67B6\uFF0C@Resource \u6CE8\u89E3\u4E5F\u662F\u652F\u6301\u7684\u3002\u53E6\u5916\uFF0C@Resource \u662F byName \u81EA\u52A8\u88C5\u914D\uFF0C@Autowired \u662F byType \u81EA\u52A8\u88C5\u914D\uFF0C\u5F53\u6709\u4E24\u4E2A\u7C7B\u578B\u5B8C\u5168\u4E00\u6837\u7684\u5BF9\u8C61\u65F6\uFF0C@Autowired \u5C31\u4F1A\u51FA\u9519\u4E86\u3002</li></ul>`,18),m=s("\u82CF\u4E09\u5199\u4E86\u4E00\u7BC7@Autowired\u7684\u6587\u7AE0\uFF0C\u5F88\u4E0D\u9519\uFF1A"),g={href:"https://www.zhihu.com/question/39356740",target:"_blank",rel:"noopener noreferrer"},b=s("https://www.zhihu.com/question/39356740"),f=t(`<p>\u5F53\u7136\u4E86\uFF0C\u53EA\u662F\u7B80\u5355\u7684\u589E\u5220\u6539\u67E5\u5DF2\u7ECF\u4E0D\u80FD\u63D0\u8D77\u6211\u4EEC\u5B66\u4E60\u7684\u5174\u8DA3\u4E86\uFF0C\u5FC5\u987B\u5F97\u6765\u70B9\u4E0D\u4E00\u6837\u7684\uFF0C\u6240\u4EE5\u6211\u4EEC\u5728 UserService \u63A5\u53E3\u4E2D\u6DFB\u52A0\u4E00\u4E2A\u5206\u9875\u7684\u63A5\u53E3\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">Page</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">User</span><span class="token punctuation">&gt;</span></span> <span class="token function">findAll</span><span class="token punctuation">(</span><span class="token class-name">Pageable</span> pageable<span class="token punctuation">)</span><span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>\u5B9E\u73B0\u7C7B\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token annotation punctuation">@Override</span>
 <span class="token keyword">public</span> <span class="token class-name">Page</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">User</span><span class="token punctuation">&gt;</span></span> <span class="token function">findAll</span><span class="token punctuation">(</span><span class="token class-name">Pageable</span> pageable<span class="token punctuation">)</span> <span class="token punctuation">{</span>
     <span class="token keyword">return</span> userRepository<span class="token punctuation">.</span><span class="token function">findAll</span><span class="token punctuation">(</span>pageable<span class="token punctuation">)</span><span class="token punctuation">;</span>
@@ -82,7 +82,7 @@ import{_ as c}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o as i,
 <span class="token keyword">public</span> <span class="token class-name">List</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">User</span><span class="token punctuation">&gt;</span></span> <span class="token function">findByNameLikeIgnoreCase</span><span class="token punctuation">(</span><span class="token class-name">String</span> name<span class="token punctuation">)</span> <span class="token punctuation">{</span>
     <span class="token keyword">return</span> userRepository<span class="token punctuation">.</span><span class="token function">findByNameLikeIgnoreCase</span><span class="token punctuation">(</span>name<span class="token punctuation">)</span><span class="token punctuation">;</span>
 <span class="token punctuation">}</span>
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="\u6D4B\u8BD5-spring-data-jpa" tabindex="-1"><a class="header-anchor" href="#\u6D4B\u8BD5-spring-data-jpa" aria-hidden="true">#</a> \u6D4B\u8BD5 Spring Data JPA</h3><p>\u5728\u6D4B\u8BD5\u7C7B\u4E2D\u5BF9\u670D\u52A1\u7C7B\u4E2D\u7684 5 \u4E2A\u63A5\u53E3\u8FDB\u884C\u6D4B\u8BD5\uFF0C\u987A\u5E26\u5728application.yml \u4E2D\u5F00\u542F SQL \u8BED\u53E5\u7684\u8F93\u51FA\uFF0C\u770B\u770B JPA \u81EA\u52A8\u751F\u6210\u7684 SQL \u8BED\u53E5\u5230\u5E95\u957F\u4EC0\u4E48\u6837\u5B50\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/jpa-a3d8641a-c701-47bb-ae44-f53eb8e05f65.png" alt=""></p><p>\u6D4B\u8BD5\u7C7B\u975E\u5E38\u7B80\u5355\u54C8\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token annotation punctuation">@SpringBootTest</span>
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h2 id="\u6D4B\u8BD5-spring-data-jpa" tabindex="-1"><a class="header-anchor" href="#\u6D4B\u8BD5-spring-data-jpa" aria-hidden="true">#</a> \u6D4B\u8BD5 Spring Data JPA</h2><p>\u5728\u6D4B\u8BD5\u7C7B\u4E2D\u5BF9\u670D\u52A1\u7C7B\u4E2D\u7684 5 \u4E2A\u63A5\u53E3\u8FDB\u884C\u6D4B\u8BD5\uFF0C\u987A\u5E26\u5728application.yml \u4E2D\u5F00\u542F SQL \u8BED\u53E5\u7684\u8F93\u51FA\uFF0C\u770B\u770B JPA \u81EA\u52A8\u751F\u6210\u7684 SQL \u8BED\u53E5\u5230\u5E95\u957F\u4EC0\u4E48\u6837\u5B50\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/jpa-a3d8641a-c701-47bb-ae44-f53eb8e05f65.png" alt=""></p><p>\u6D4B\u8BD5\u7C7B\u975E\u5E38\u7B80\u5355\u54C8\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token annotation punctuation">@SpringBootTest</span>
 <span class="token annotation punctuation">@Slf4j</span>
 <span class="token keyword">class</span> <span class="token class-name">CodingmoreJpaApplicationTests</span> <span class="token punctuation">{</span>
     <span class="token annotation punctuation">@Resource</span>
@@ -119,4 +119,4 @@ import{_ as c}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o as i,
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p><code>@Query</code> \u6CE8\u89E3\u4E2D\u7684 \u201Cuser\u201D \u4E3A\u6570\u636E\u5E93\u8868\u540D\uFF0C\u53E6\u5916\u9700\u8981\u52A0\u4E0A\u53C2\u6570 nativeQuery\uFF0C\u9ED8\u8BA4\u503C\u4E3A false\uFF0C\u8BBE\u4E3A true \u8868\u660E\u5F00\u542F\u539F\u751F SQL \u67E5\u8BE2\u3002\u6CE8\u610F\u8FD9\u6B21\u6211\u4EEC\u7528\u201C||\u201D\u66FF\u6362\u4E86\u201Cconcat\u201D \u65B9\u6CD5\u3002</p><p>\u9664\u4E86\u4F7F\u7528 <code>?1</code>\u3001<code>?2</code> \u7684\u5F62\u5F0F\u6765\u52A8\u6001\u4F20\u9012\u53C2\u6570\uFF0C\u6211\u4EEC\u8FD8\u53EF\u4EE5\u4F7F\u7528 <code>@Param</code> \u6CE8\u89E3\u7684\u5F62\u5F0F\u6765\u4F20\u9012\u53C2\u6570\uFF0C\u6B64\u65F6\u7684 SQL \u8BED\u53E5\u4E2D\u91C7\u7528 <code>:param</code> \u5F62\u5F0F\u6765\u63A5\u6536\u53C2\u6570\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token annotation punctuation">@Query</span><span class="token punctuation">(</span><span class="token string">&quot;select u from User u where u.name like concat(&#39;%&#39;,:name,&#39;%&#39;)&quot;</span><span class="token punctuation">)</span>
 <span class="token class-name">List</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">User</span><span class="token punctuation">&gt;</span></span> <span class="token function">findByNameLikeParam</span><span class="token punctuation">(</span><span class="token annotation punctuation">@Param</span><span class="token punctuation">(</span><span class="token string">&quot;name&quot;</span><span class="token punctuation">)</span><span class="token class-name">String</span> name<span class="token punctuation">)</span><span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><p>\u8FD9\u662F\u5220\u9664\uFF1A</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>Hibernate: delete from user where id=?
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h3 id="spring-data-jpa-\u548C-mybatis-\u7684\u5BF9\u6BD4" tabindex="-1"><a class="header-anchor" href="#spring-data-jpa-\u548C-mybatis-\u7684\u5BF9\u6BD4" aria-hidden="true">#</a> Spring Data JPA \u548C MyBatis \u7684\u5BF9\u6BD4</h3><hr>`,41),y=s("\u66F4\u591A\u5185\u5BB9\uFF0C\u53EA\u9488\u5BF9\u300AJava \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF\u300B\u661F\u7403\u7528\u6237\u5F00\u653E\uFF0C\u9700\u8981\u7684\u5C0F\u4F19\u4F34\u53EF\u4EE5"),w=s("\u6233\u94FE\u63A5\u{1F517}"),j=s("\u52A0\u5165\u6211\u4EEC\u7684\u661F\u7403\uFF0C\u4E00\u8D77\u5B66\u4E60\uFF0C\u4E00\u8D77\u5377\u3002\u3002"),S=n("strong",null,"\u7F16\u7A0B\u55B5",-1),x=s("\u{1F431}\u662F\u4E00\u4E2A Spring Boot+Vue \u7684\u524D\u540E\u7AEF\u5206\u79BB\u9879\u76EE\uFF0C\u878D\u5408\u4E86\u5E02\u9762\u4E0A\u7EDD\u5927\u591A\u6570\u6D41\u884C\u7684\u6280\u672F\u8981\u70B9\u3002\u901A\u8FC7\u5B66\u4E60\u5B9E\u6218\u9879\u76EE\uFF0C\u4F60\u53EF\u4EE5\u5C06\u6240\u5B66\u7684\u77E5\u8BC6\u901A\u8FC7\u5B9E\u8DF5\u8FDB\u884C\u68C0\u9A8C\u3001\u4F60\u53EF\u4EE5\u62D3\u5BBD\u81EA\u5DF1\u7684\u6280\u672F\u8FB9\u754C\uFF0C\u4F60\u53EF\u4EE5\u638C\u63E1\u4E00\u4E2A\u771F\u6B63\u7684\u5B9E\u6218\u9879\u76EE\u662F\u5982\u4F55\u4ECE 0 \u5230 1 \u7684\u3002"),q=n("hr",null,null,-1),A=n("h3",{id:"\u6E90\u7801\u5730\u5740",tabindex:"-1"},[n("a",{class:"header-anchor",href:"#\u6E90\u7801\u5730\u5740","aria-hidden":"true"},"#"),s(" \u6E90\u7801\u5730\u5740\uFF1A")],-1),P=s("\u7F16\u7A0B\u55B5\uFF1A"),J={href:"https://github.com/itwanger/coding-more",target:"_blank",rel:"noopener noreferrer"},U=s("https://github.com/itwanger/coding-more"),I=s("Spring Boot \u6574\u5408 JPA\uFF1A"),L={href:"https://github.com/itwanger/codingmore-learning",target:"_blank",rel:"noopener noreferrer"},R=s("https://github.com/itwanger/codingmore-learning"),B=n("hr",null,null,-1),Q=n("p",null,[n("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png",alt:""})],-1);function E(N,D){const e=p("ExternalLinkIcon"),o=p("RouterLink");return i(),l("div",null,[d,n("blockquote",null,[n("p",null,[k,n("a",v,[m,a(e)])])]),g,n("blockquote",null,[n("p",null,[b,n("a",f,[h,a(e)])])]),_,n("p",null,[y,a(o,{to:"/springboot/docs/zhishixingqiu/"},{default:u(()=>[w]),_:1}),j,S,x]),q,A,n("blockquote",null,[n("ul",null,[n("li",null,[P,n("a",J,[U,a(e)])]),n("li",null,[I,n("a",L,[R,a(e)])])])]),B,Q])}var T=c(r,[["render",E],["__file","jpa.html.vue"]]);export{T as default};
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h2 id="spring-data-jpa-\u548C-mybatis-\u7684\u5BF9\u6BD4" tabindex="-1"><a class="header-anchor" href="#spring-data-jpa-\u548C-mybatis-\u7684\u5BF9\u6BD4" aria-hidden="true">#</a> Spring Data JPA \u548C MyBatis \u7684\u5BF9\u6BD4</h2><hr>`,41),h=s("\u66F4\u591A\u5185\u5BB9\uFF0C\u53EA\u9488\u5BF9\u300AJava \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF\u300B\u661F\u7403\u7528\u6237\u5F00\u653E\uFF0C\u9700\u8981\u7684\u5C0F\u4F19\u4F34\u53EF\u4EE5"),_={href:"https://tobebetterjavaer.com/zhishixingqiu/",target:"_blank",rel:"noopener noreferrer"},y=s("\u6233\u94FE\u63A5\u{1F517}"),j=s("\u52A0\u5165\u6211\u4EEC\u7684\u661F\u7403\uFF0C\u4E00\u8D77\u5B66\u4E60\uFF0C\u4E00\u8D77\u5377\u3002\u3002"),w=n("strong",null,"\u7F16\u7A0B\u55B5",-1),S=s("\u{1F431}\u662F\u4E00\u4E2A Spring Boot+Vue \u7684\u524D\u540E\u7AEF\u5206\u79BB\u9879\u76EE\uFF0C\u878D\u5408\u4E86\u5E02\u9762\u4E0A\u7EDD\u5927\u591A\u6570\u6D41\u884C\u7684\u6280\u672F\u8981\u70B9\u3002\u901A\u8FC7\u5B66\u4E60\u5B9E\u6218\u9879\u76EE\uFF0C\u4F60\u53EF\u4EE5\u5C06\u6240\u5B66\u7684\u77E5\u8BC6\u901A\u8FC7\u5B9E\u8DF5\u8FDB\u884C\u68C0\u9A8C\u3001\u4F60\u53EF\u4EE5\u62D3\u5BBD\u81EA\u5DF1\u7684\u6280\u672F\u8FB9\u754C\uFF0C\u4F60\u53EF\u4EE5\u638C\u63E1\u4E00\u4E2A\u771F\u6B63\u7684\u5B9E\u6218\u9879\u76EE\u662F\u5982\u4F55\u4ECE 0 \u5230 1 \u7684\u3002"),x=n("hr",null,null,-1),q=n("h2",{id:"\u6E90\u7801\u5730\u5740",tabindex:"-1"},[n("a",{class:"header-anchor",href:"#\u6E90\u7801\u5730\u5740","aria-hidden":"true"},"#"),s(" \u6E90\u7801\u5730\u5740\uFF1A")],-1),A=s("\u7F16\u7A0B\u55B5\uFF1A"),P={href:"https://github.com/itwanger/coding-more",target:"_blank",rel:"noopener noreferrer"},J=s("https://github.com/itwanger/coding-more"),U=s("Spring Boot \u6574\u5408 JPA\uFF1A"),I={href:"https://github.com/itwanger/codingmore-learning/tree/main/codingmore-jpa",target:"_blank",rel:"noopener noreferrer"},L=s("https://github.com/itwanger/codingmore-learning/tree/main/codingmore-jpa"),R=n("hr",null,null,-1),B=n("p",null,[n("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png",alt:""})],-1);function Q(E,N){const a=o("ExternalLinkIcon");return c(),i("div",null,[u,n("blockquote",null,[n("p",null,[r,n("a",d,[k,e(a)])])]),v,n("blockquote",null,[n("p",null,[m,n("a",g,[b,e(a)])])]),f,n("p",null,[h,n("a",_,[y,e(a)]),j,w,S]),x,q,n("blockquote",null,[n("ul",null,[n("li",null,[A,n("a",P,[J,e(a)])]),n("li",null,[U,n("a",I,[L,e(a)])])])]),R,B])}var C=p(l,[["render",Q],["__file","jpa.html.vue"]]);export{C as default};
diff --git a/dist/assets/jpa.html.c4109873.js b/dist/assets/jpa.html.cb4e1f80.js
similarity index 72%
rename from dist/assets/jpa.html.c4109873.js
rename to dist/assets/jpa.html.cb4e1f80.js
index 16ec0b77..773d03a1 100644
--- a/dist/assets/jpa.html.c4109873.js
+++ b/dist/assets/jpa.html.cb4e1f80.js
@@ -1 +1 @@
-const t={key:"v-5964f7d5",path:"/springboot/jpa.html",title:"Spring Boot \u6574\u5408 JPA",lang:"zh-CN",frontmatter:{category:["Java\u4F01\u4E1A\u7EA7\u5F00\u53D1"],tag:["Spring Boot"],title:"Spring Boot \u6574\u5408 JPA",summary:"Spring Data JPA \u7B80\u4ECB Spring Data \u662F Spring \u63D0\u4F9B\u7684\u4E00\u4E2A\u64CD\u4F5C\u6570\u636E\u7684\u6846\u67B6\uFF0CSpring Data JPA\u662F Spring Data \u4E0B\u7684\u4E00\u4E2A\u57FA\u4E8E JPA \u6807\u51C6\u7684\u64CD\u4F5C\u6570\u636E\u7684\u6A21\u5757\u3002 JPA\uFF08Java Persistence API\uFF09\u662F Java \u4EB2\u5988 Sun \u516C\u53F8\u63D0\u51FA\u7684\u4E00\u5957 Java \u6301\u4E45\u5316\u89C4\u8303\u3002\u6240\u8C13\u89C4\u8303\uFF0C\u5C31\u662F\u53EA\u5B9A\u4E49\u6807\u51C6\uFF0C\u4E0D\u63D0\u4F9B\u5B9E",head:[["meta",{property:"og:url",content:"https://tobebetterjavaer.com/springboot/jpa.html"}],["meta",{property:"og:site_name",content:"Java \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF"}],["meta",{property:"og:title",content:"Spring Boot \u6574\u5408 JPA"}],["meta",{property:"og:type",content:"article"}],["meta",{property:"og:updated_time",content:"2022-05-21T16:06:08.000Z"}],["meta",{property:"og:locale",content:"zh-CN"}],["meta",{property:"article:tag",content:"Spring Boot"}],["meta",{property:"article:modified_time",content:"2022-05-21T16:06:08.000Z"}]]},excerpt:"",headers:[{level:3,title:"Spring Data JPA \u7B80\u4ECB",slug:"spring-data-jpa-\u7B80\u4ECB",children:[]},{level:3,title:"Spring Boot \u6574\u5408 Spring Data JPA",slug:"spring-boot-\u6574\u5408-spring-data-jpa",children:[]},{level:3,title:"\u6D4B\u8BD5 Spring Data JPA",slug:"\u6D4B\u8BD5-spring-data-jpa",children:[]},{level:3,title:"Spring Data JPA \u548C MyBatis \u7684\u5BF9\u6BD4",slug:"spring-data-jpa-\u548C-mybatis-\u7684\u5BF9\u6BD4",children:[]},{level:3,title:"\u6E90\u7801\u5730\u5740\uFF1A",slug:"\u6E90\u7801\u5730\u5740",children:[]}],git:{createdTime:1652078956e3,updatedTime:1653149168e3,contributors:[{name:"itwanger",email:"www.qing_gee@163.com",commits:3}]},readingTime:{minutes:7.21,words:2162},filePathRelative:"springboot/jpa.md"};export{t as data};
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diff --git a/dist/assets/junit.html.a79d9c04.js b/dist/assets/junit.html.9c832cdc.js
similarity index 99%
rename from dist/assets/junit.html.a79d9c04.js
rename to dist/assets/junit.html.9c832cdc.js
index 88f8a67d..b07f8a71 100644
--- a/dist/assets/junit.html.a79d9c04.js
+++ b/dist/assets/junit.html.9c832cdc.js
@@ -1,4 +1,4 @@
-import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e as t}from"./app.a0271b9c.js";const e={},p=t(`<h3 id="_01\u3001\u524D\u4E16\u4ECA\u751F" tabindex="-1"><a class="header-anchor" href="#_01\u3001\u524D\u4E16\u4ECA\u751F" aria-hidden="true">#</a> 01\u3001\u524D\u4E16\u4ECA\u751F</h3><p>\u4F60\u597D\u5440\uFF0C\u6211\u662F JUnit\uFF0C\u4E00\u4E2A\u5F00\u6E90\u7684 Java \u5355\u5143\u6D4B\u8BD5\u6846\u67B6\u3002\u5728\u4E86\u89E3\u6211\u4E4B\u524D\uFF0C\u5148\u6765\u4E86\u89E3\u4E00\u4E0B\u4EC0\u4E48\u662F\u5355\u5143\u6D4B\u8BD5\u3002\u5355\u5143\u6D4B\u8BD5\uFF0C\u5C31\u662F\u9488\u5BF9\u6700\u5C0F\u7684\u529F\u80FD\u5355\u5143\u7F16\u5199\u6D4B\u8BD5\u4EE3\u7801\u3002\u5728 Java \u4E2D\uFF0C\u6700\u5C0F\u7684\u529F\u80FD\u5355\u5143\u5C31\u662F\u65B9\u6CD5\uFF0C\u56E0\u6B64\uFF0C\u5BF9 Java \u7A0B\u5E8F\u5458\u8FDB\u884C\u5355\u5143\u6D4B\u8BD5\u5B9E\u9645\u4E0A\u5C31\u662F\u5BF9 Java \u65B9\u6CD5\u7684\u6D4B\u8BD5\u3002</p><p>\u4E3A\u4EC0\u4E48\u8981\u8FDB\u884C\u5355\u5143\u6D4B\u8BD5\u5462\uFF1F\u56E0\u4E3A\u5355\u5143\u6D4B\u8BD5\u53EF\u4EE5\u786E\u4FDD\u4F60\u7F16\u5199\u7684\u4EE3\u7801\u662F\u7B26\u5408\u8F6F\u4EF6\u9700\u6C42\u548C\u9075\u5FAA\u5F00\u53D1\u89C4\u8303\u7684\u3002\u5355\u5143\u6D4B\u8BD5\u662F\u6240\u6709\u6D4B\u8BD5\u4E2D\u6700\u5E95\u5C42\u7684\u4E00\u7C7B\u6D4B\u8BD5\uFF0C\u662F\u7B2C\u4E00\u4E2A\u73AF\u8282\uFF0C\u4E5F\u662F\u6700\u91CD\u8981\u7684\u4E00\u4E2A\u73AF\u8282\uFF0C\u662F\u552F\u4E00\u4E00\u6B21\u80FD\u591F\u8FBE\u5230\u4EE3\u7801\u8986\u76D6\u7387 100% \u7684\u6D4B\u8BD5\uFF0C\u662F\u6574\u4E2A\u8F6F\u4EF6\u6D4B\u8BD5\u8FC7\u7A0B\u7684\u57FA\u7840\u548C\u524D\u63D0\u3002\u53EF\u4EE5\u8FD9\u4E48\u8BF4\uFF0C\u5355\u5143\u6D4B\u8BD5\u7684\u6027\u4EF7\u6BD4\u662F\u6700\u597D\u7684\u3002</p><p>\u5FAE\u8F6F\u516C\u53F8\u4E4B\u524D\u6709\u8FD9\u6837\u4E00\u4E2A\u7EDF\u8BA1\uFF1Abug \u5728\u5355\u5143\u6D4B\u8BD5\u9636\u6BB5\u88AB\u53D1\u73B0\u7684\u5E73\u5747\u8017\u65F6\u662F 3.25 \u5C0F\u65F6\uFF0C\u5982\u679C\u9057\u6F0F\u5230\u7CFB\u7EDF\u6D4B\u8BD5\u5219\u9700\u8981 11.5 \u4E2A\u5C0F\u65F6\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/junit-5b0afb32-c60e-4218-98b1-44288705e472.png" alt=""></p><p>\u7ECF\u6211\u8FD9\u4E48\u4E00\u8BF4\uFF0C\u4F60\u5E94\u8BE5\u5DF2\u7ECF\u5F88\u6E05\u695A\u5355\u5143\u6D4B\u8BD5\u7684\u91CD\u8981\u6027\u4E86\u3002\u90A3\u5728\u4F60\u6700\u521D\u7F16\u5199\u6D4B\u8BD5\u4EE3\u7801\u7684\u65F6\u5019\uFF0C\u662F\u4E0D\u662F\u7ECF\u5E38\u8FD9\u4E48\u505A\uFF1F\u5C31\u50CF\u4E0B\u9762\u8FD9\u6837\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">Factorial</span> <span class="token punctuation">{</span>
+import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e as t}from"./app.615e41d8.js";const e={},p=t(`<h3 id="_01\u3001\u524D\u4E16\u4ECA\u751F" tabindex="-1"><a class="header-anchor" href="#_01\u3001\u524D\u4E16\u4ECA\u751F" aria-hidden="true">#</a> 01\u3001\u524D\u4E16\u4ECA\u751F</h3><p>\u4F60\u597D\u5440\uFF0C\u6211\u662F JUnit\uFF0C\u4E00\u4E2A\u5F00\u6E90\u7684 Java \u5355\u5143\u6D4B\u8BD5\u6846\u67B6\u3002\u5728\u4E86\u89E3\u6211\u4E4B\u524D\uFF0C\u5148\u6765\u4E86\u89E3\u4E00\u4E0B\u4EC0\u4E48\u662F\u5355\u5143\u6D4B\u8BD5\u3002\u5355\u5143\u6D4B\u8BD5\uFF0C\u5C31\u662F\u9488\u5BF9\u6700\u5C0F\u7684\u529F\u80FD\u5355\u5143\u7F16\u5199\u6D4B\u8BD5\u4EE3\u7801\u3002\u5728 Java \u4E2D\uFF0C\u6700\u5C0F\u7684\u529F\u80FD\u5355\u5143\u5C31\u662F\u65B9\u6CD5\uFF0C\u56E0\u6B64\uFF0C\u5BF9 Java \u7A0B\u5E8F\u5458\u8FDB\u884C\u5355\u5143\u6D4B\u8BD5\u5B9E\u9645\u4E0A\u5C31\u662F\u5BF9 Java \u65B9\u6CD5\u7684\u6D4B\u8BD5\u3002</p><p>\u4E3A\u4EC0\u4E48\u8981\u8FDB\u884C\u5355\u5143\u6D4B\u8BD5\u5462\uFF1F\u56E0\u4E3A\u5355\u5143\u6D4B\u8BD5\u53EF\u4EE5\u786E\u4FDD\u4F60\u7F16\u5199\u7684\u4EE3\u7801\u662F\u7B26\u5408\u8F6F\u4EF6\u9700\u6C42\u548C\u9075\u5FAA\u5F00\u53D1\u89C4\u8303\u7684\u3002\u5355\u5143\u6D4B\u8BD5\u662F\u6240\u6709\u6D4B\u8BD5\u4E2D\u6700\u5E95\u5C42\u7684\u4E00\u7C7B\u6D4B\u8BD5\uFF0C\u662F\u7B2C\u4E00\u4E2A\u73AF\u8282\uFF0C\u4E5F\u662F\u6700\u91CD\u8981\u7684\u4E00\u4E2A\u73AF\u8282\uFF0C\u662F\u552F\u4E00\u4E00\u6B21\u80FD\u591F\u8FBE\u5230\u4EE3\u7801\u8986\u76D6\u7387 100% \u7684\u6D4B\u8BD5\uFF0C\u662F\u6574\u4E2A\u8F6F\u4EF6\u6D4B\u8BD5\u8FC7\u7A0B\u7684\u57FA\u7840\u548C\u524D\u63D0\u3002\u53EF\u4EE5\u8FD9\u4E48\u8BF4\uFF0C\u5355\u5143\u6D4B\u8BD5\u7684\u6027\u4EF7\u6BD4\u662F\u6700\u597D\u7684\u3002</p><p>\u5FAE\u8F6F\u516C\u53F8\u4E4B\u524D\u6709\u8FD9\u6837\u4E00\u4E2A\u7EDF\u8BA1\uFF1Abug \u5728\u5355\u5143\u6D4B\u8BD5\u9636\u6BB5\u88AB\u53D1\u73B0\u7684\u5E73\u5747\u8017\u65F6\u662F 3.25 \u5C0F\u65F6\uFF0C\u5982\u679C\u9057\u6F0F\u5230\u7CFB\u7EDF\u6D4B\u8BD5\u5219\u9700\u8981 11.5 \u4E2A\u5C0F\u65F6\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/junit-5b0afb32-c60e-4218-98b1-44288705e472.png" alt=""></p><p>\u7ECF\u6211\u8FD9\u4E48\u4E00\u8BF4\uFF0C\u4F60\u5E94\u8BE5\u5DF2\u7ECF\u5F88\u6E05\u695A\u5355\u5143\u6D4B\u8BD5\u7684\u91CD\u8981\u6027\u4E86\u3002\u90A3\u5728\u4F60\u6700\u521D\u7F16\u5199\u6D4B\u8BD5\u4EE3\u7801\u7684\u65F6\u5019\uFF0C\u662F\u4E0D\u662F\u7ECF\u5E38\u8FD9\u4E48\u505A\uFF1F\u5C31\u50CF\u4E0B\u9762\u8FD9\u6837\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">Factorial</span> <span class="token punctuation">{</span>
     <span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">long</span> <span class="token function">fact</span><span class="token punctuation">(</span><span class="token keyword">long</span> n<span class="token punctuation">)</span> <span class="token punctuation">{</span>
         <span class="token keyword">long</span> r <span class="token operator">=</span> <span class="token number">1</span><span class="token punctuation">;</span>
         <span class="token keyword">for</span> <span class="token punctuation">(</span><span class="token keyword">long</span> i <span class="token operator">=</span> <span class="token number">1</span><span class="token punctuation">;</span> i <span class="token operator">&lt;=</span> n<span class="token punctuation">;</span> i<span class="token operator">++</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
diff --git a/dist/assets/jvm.html.e2246150.js b/dist/assets/jvm.html.375475cb.js
similarity index 99%
rename from dist/assets/jvm.html.e2246150.js
rename to dist/assets/jvm.html.375475cb.js
index 85577e19..8ab560c0 100644
--- a/dist/assets/jvm.html.e2246150.js
+++ b/dist/assets/jvm.html.375475cb.js
@@ -1 +1 @@
-import{_ as r}from"./plugin-vue_export-helper.21dcd24c.js";import{r as s,o as l,c as i,a as e,b as a,e as n,d as t}from"./app.a0271b9c.js";const _={},h=n('<h1 id="java\u865A\u62DF\u673A\u5B66\u4E60\u8DEF\u7EBF-\u5EFA\u8BAE\u6536\u85CF" tabindex="-1"><a class="header-anchor" href="#java\u865A\u62DF\u673A\u5B66\u4E60\u8DEF\u7EBF-\u5EFA\u8BAE\u6536\u85CF" aria-hidden="true">#</a> Java\u865A\u62DF\u673A\u5B66\u4E60\u8DEF\u7EBF\uFF08\u5EFA\u8BAE\u6536\u85CF\u{1F44D}\uFF09</h1><p>2020 \u5E74\u7684\u65F6\u5019\uFF0C\u901A\u8BFB\u4E86\u4E00\u904D\u5468\u5FD7\u660E\u8001\u5E08\u7684\u300A\u6DF1\u5165\u7406\u89E3 Java \u865A\u62DF\u673A\uFF1AJVM \u9AD8\u7EA7\u7279\u6027\u4E0E\u6700\u4F73\u5B9E\u8DF5\u300B\u7B2C\u4E09\u7248\uFF0C\u8BFB\u5B8C\u4E4B\u540E\u53D7\u76CA\u532A\u6D45\uFF0C\u8FD9\u8BA9\u6211\u5BF9 Java \u865A\u62DF\u673A\u6709\u4E86\u4E00\u4E2A\u66F4\u5B8C\u6574\u7684\u8BA4\u8BC6\u3002\u6BEB\u65E0\u7591\u95EE\uFF0C\u300A\u6DF1\u5165\u7406\u89E3 Java \u865A\u62DF\u673A\u300B\u662F JVM \u4E66\u7C4D\u4E2D\u6700\u597D\u7684\u4E00\u672C\u4E66\u4E86\uFF0C\u56FD\u4EA7\u6280\u672F\u4E66\u7684\u5929\u82B1\u677F\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/jvm-7036a048-4034-4965-92a6-e35d0211ba71.png" alt=""></p><p>\u5728\u91D1\u4E09\u94F6\u56DB/\u91D1\u4E5D\u94F6\u5341\u7684\u8DF3\u69FD\u5B63\u4E2D\uFF0C\u5F88\u591A\u5C0F\u4F19\u4F34\u90FD\u4F1A\u5FCD\u4E0D\u4F4F\u8822\u8822\u6B32\u52A8\uFF0C\u5176\u4E2D JVM \u66F4\u662F\u9762\u8BD5\u4E2D\u4E0D\u53EF\u6216\u7F3A\u7684\u4E00\u90E8\u5206\uFF0C\u6240\u4EE5\u6211\u82B1\u4E86\u51E0\u5929\u7684\u65F6\u95F4\u6574\u7406\u4E86\u4E00\u6761 JVM \u7684\u5B66\u4E60\u8DEF\u7EBF\uFF0C\u5E0C\u671B\u80FD\u5E2E\u52A9\u5230\u5927\u5BB6\u3002</p><h3 id="\u4E00\u3001\u4E3A\u4EC0\u4E48\u8981\u5B66\u4E60-jvm" tabindex="-1"><a class="header-anchor" href="#\u4E00\u3001\u4E3A\u4EC0\u4E48\u8981\u5B66\u4E60-jvm" aria-hidden="true">#</a> \u4E00\u3001\u4E3A\u4EC0\u4E48\u8981\u5B66\u4E60 JVM\uFF1F</h3><p>\u66FE\u7ECF\u6211\u5BF9 JVM \u4E5F\u662F\u611F\u5230\u975E\u5E38\u7684\u5934\u75DB\uFF0C\u5B8C\u5168\u641E\u4E0D\u61C2\u8BE5\u600E\u4E48\u5165\u95E8\uFF0C\u53EA\u662F\u542C\u8BF4\u300A\u6DF1\u5165\u7406\u89E3 Java \u865A\u62DF\u673A\u300B\u8FD9\u672C\u4E66\u5F88\u540A\uFF0C\u4F46\u771F\u8BFB\u8D77\u6765\uFF0C\u5374\u9700\u8981\u6781\u5927\u7684\u8010\u5FC3\u548C\u5B9A\u529B\uFF0C\u5426\u5219\u5F88\u5FEB\u5C31\u4F1A\u5728\u8BFB\u5B8C\u7B2C\u4E00\u7AE0 JVM \u7684\u7B80\u53F2\u540E\u653E\u5F03\u3002</p><p>\u90A3\u9996\u5148\uFF0C\u6211\u4EEC\u5C31\u8981\u641E\u6E05\u695A\uFF0C\u4E3A\u4EC0\u4E48\u8981\u5B66\u4E60 JVM \uFF1F</p><p>\u7B2C\u4E00\uFF0C\u5F53\u7136\u662F\u9762\u8BD5\u8981\u8003\uFF0C\u8FD9\u4E00\u70B9\u6BEB\u65E0\u7591\u95EE\uFF0C\u5C24\u5176\u662F\u5BF9\u4E8E\u8981\u53C2\u52A0\u6821\u62DB\u7684\u5E94\u5C4A\u751F\u6765\u8BF4\uFF0CJVM \u662F\u7ED5\u4E0D\u8FC7\u53BB\u7684\uFF0C\u5FC5\u987B\u5F97\u5B66\u3002</p><p>\u7B2C\u4E8C\uFF0C\u5982\u679C\u4F60\u60F3\u6210\u4E3A\u516C\u53F8\u4E0D\u53EF\u6216\u7F3A\u7684\u9876\u6881\u67F1\uFF0C\u90A3 JVM \u4F60\u5F97\u5B66\uFF0C\u56E0\u4E3A\u4E00\u822C\u60C5\u51B5\u4E0B\uFF0C\u9047\u5230\u7684\u95EE\u9898\u57FA\u672C\u4E0A Google \u4E0B\u5C31\u80FD\u89E3\u51B3\u4E86\uFF0C\u53EF\u4E00\u65E6\u9047\u5230 JVM \u6027\u80FD\u8C03\u4F18\uFF0C\u5C31\u5FC5\u987B\u5F97\u6709\u80FD\u67E5 OOM \u7684\u539F\u56E0\u3001\u80FD\u770B\u61C2\u5B57\u8282\u7801\u7684\u8001\u9E1F\u51FA\u9A6C\u4E86\u3002</p><p>\u5E94\u7528\u7A0B\u5E8F\u4E00\u65E6\u4E0A\u7EBF\uFF0C\u51FA\u95EE\u9898\u662F\u677F\u4E0A\u9489\u9489\u7684\u4E8B\uFF0C\u9664\u4E86\u6570\u636E\u5E93\u3001\u7F51\u7EDC\u3001\u4EE3\u7801\u903B\u8F91\u4E0A\u7684\u95EE\u9898\uFF0C\u5269\u4E0B\u7684\u5C31\u6709\u5185\u5B58\u6EA2\u51FA\u554A\uFF0C\u9891\u7E41 GC \u5BFC\u81F4\u7684\u6027\u80FD\u74F6\u9888\u554A\u7B49\u68D8\u624B\u95EE\u9898\u3002</p><p>\u9047\u5230\u8FD9\u79CD\u95EE\u9898\uFF0C\u4F60\u5C31\u5FC5\u987B\u5F97\u80FD\u770B\u61C2 GC \u65E5\u5FD7\uFF0C\u660E\u767D\u4EC0\u4E48\u662F\u8001\u5E74\u4EE3\u3001\u6C38\u4E45\u4EE3\u3001\u5143\u6570\u636E\u533A\u7B49\uFF0C\u8FD9\u4E9B\u90FD\u662F Java \u865A\u62DF\u673A\u65B9\u9762\u7684\u77E5\u8BC6\u3002</p><p>\u660E\u767D\u4E86\u5B66\u4E60 JVM \u7684\u91CD\u8981\u6027\uFF0C\u90A3\u6211\u4EEC\u5C31\u5F00\u641E\u5427\uFF01</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/jvm-4cbbdc72-3bdd-4b14-9d8d-ecd7764afb11.png" alt=""></p><h3 id="\u4E8C\u3001jvm-\u5B66\u4E60\u8DEF\u7EBF\u56FE" tabindex="-1"><a class="header-anchor" href="#\u4E8C\u3001jvm-\u5B66\u4E60\u8DEF\u7EBF\u56FE" aria-hidden="true">#</a> \u4E8C\u3001JVM \u5B66\u4E60\u8DEF\u7EBF\u56FE</h3><p>\u8FD9\u662F\u6211\u6700\u8FD1\u6574\u7406\u7684\u4E00\u5F20\u5173\u4E8E JVM \u7684\u601D\u7EF4\u5BFC\u56FE\uFF0C\u5927\u7684\u65B9\u5411\u53EF\u4EE5\u5206\u4E3A\u4E09\u4E2A\u90E8\u5206\uFF1A\u5B57\u8282\u7801\u4E0E\u7C7B\u7684\u52A0\u8F7D\u3001\u5185\u5B58\u4E0E\u5783\u573E\u56DE\u6536\u3001\u6027\u80FD\u76D1\u63A7\u548C\u8C03\u4F18\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/jvm-b4ec034b-9f20-40b9-a2a3-e77afffd2abf.png" alt=""></p><p>\u5B57\u8282\u7801\u4E0E\u7C7B\u7684\u52A0\u8F7D\u5305\u62EC\uFF1A</p><ul><li>\u7C7B\u7684\u52A0\u8F7D\u673A\u5236\uFF08\u7C7B\u7684\u52A0\u8F7D\u8FC7\u7A0B\u3001\u7C7B\u52A0\u8F7D\u5668\u3001\u53CC\u4EB2\u59D4\u6D3E\u6A21\u578B\uFF09</li><li>\u5B57\u8282\u7801\uFF08\u7C7B\u6587\u4EF6\u7ED3\u6784\u3001\u5B57\u8282\u7801\u6307\u4EE4\u3001\u5B57\u8282\u7801\u6267\u884C\u5F15\u64CE\u3001\u5B9E\u6218\u5B57\u8282\u7801\uFF09</li></ul><p>\u5185\u5B58\u4E0E\u5783\u573E\u56DE\u6536\u5305\u62EC\uFF1A</p><ul><li>JVM \u5185\u5B58\u7ED3\u6784</li><li>\u5783\u573E\u56DE\u6536\u7B97\u6CD5</li><li>\u5783\u573E\u56DE\u6536\u673A\u5236</li><li>\u5783\u573E\u6536\u96C6\u5668</li></ul><p>\u6027\u80FD\u76D1\u63A7\u548C\u8C03\u4F18\u5305\u62EC\uFF1A</p><ul><li>\u8C03\u4F18\u6307\u6807</li><li>\u8C03\u4F18\u5BF9\u8C61</li><li>\u8C03\u4F18\u5DE5\u5177</li><li>JIT \u4F18\u5316</li></ul><p>\u6709\u7406\u8BBA\u77E5\u8BC6\uFF0C\u6709\u52A8\u624B\u5B9E\u6218\uFF0C\u57FA\u672C\u4E0A\u53EF\u4EE5\u628A JVM \u8FD9\u5757\u5B66\u7684\u975E\u5E38\u624E\u5B9E\u4E86\u3002</p><h3 id="\u4E09\u3001\u786C\u6838-jvm-\u5B66\u4E60\u8D44\u6599" tabindex="-1"><a class="header-anchor" href="#\u4E09\u3001\u786C\u6838-jvm-\u5B66\u4E60\u8D44\u6599" aria-hidden="true">#</a> \u4E09\u3001\u786C\u6838 JVM \u5B66\u4E60\u8D44\u6599</h3><p><strong>1\uFF09Java \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF</strong></p><p>\u5B66 Java\uFF0C\u600E\u4E48\u80FD\u5C11\u5F97\u4E86\u4E8C\u54E5\u7684\u5C0F\u7834\u7AD9\u300AJava \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF\u300B\uFF0C\u7F51\u5740\u6211\u8D34\u4E0B\u9762\u4E86\u54C8\uFF1A</p>',26),c={href:"https://tobebetterjavaer.com/home.html#java%E8%99%9A%E6%8B%9F%E6%9C%BA",target:"_blank",rel:"noopener noreferrer"},d=t("https://tobebetterjavaer.com/home.html#java\u865A\u62DF\u673A"),b=e("p",null,"\u8FDB\u53BB\u76F4\u63A5\u627E\u300CJava \u6838\u5FC3\u300D\u91CC\u9762\u7684 Java \u865A\u62DF\u673A\u5C31\u5BF9\u4E86\u3002\u6211\u6309\u7167\u524D\u9762\u7684\u601D\u7EF4\u5BFC\u56FE\u6574\u7406\u4E86 19 \u7BC7\u6587\u7AE0\uFF0C\u5168\u90E8\u90FD\u662F\u786C\u6838\u7EA7\u522B\u7684\uFF0C\u8DDF\u7740\u5B66\u5C31\u5BF9\u4E86\u3002",-1),p=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/jvm-cc84fead-278b-46aa-a8ab-a3b07acefc12.png",alt:""})],-1),u=e("p",null,[e("strong",null,"2\uFF09\u89C6\u9891")],-1),v=e("p",null,"\u61C2\u7684\u90FD\u61C2\uFF0C\u770B\u89C6\u9891\u5230 B \u7AD9\u3002\u5148\u63A8\u8350\u5B8B\u7EA2\u5EB7\u8001\u5E08\u7684 JVM \u5168\u5957\u6559\u7A0B\uFF0C200\u591A\u4E07\u7684\u64AD\u653E\u91CF\uFF0C\u8FD8\u662F\u975E\u5E38\u53D7\u6B22\u8FCE\u7684\u3002\u5168\u5957\u8BFE\u7A0B\u5206\u4E3A\uFF1A",-1),m=e("ul",null,[e("li",null,"\u5185\u5B58\u4E0E\u5783\u573E\u56DE\u6536\u7BC7"),e("li",null,"\u5B57\u8282\u7801\u4E0E\u7C7B\u7684\u52A0\u8F7D\u7BC7"),e("li",null,"\u6027\u80FD\u76D1\u63A7\u548C\u8C03\u4F18\u7BC7")],-1),g=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/jvm-59c829ce-7fe3-45a5-b074-35dacb08941e.png",alt:""})],-1),j=t("\u89C6\u9891\u5730\u5740\uFF1A"),J={href:"https://www.bilibili.com/video/BV1PJ411n7xZ",target:"_blank",rel:"noopener noreferrer"},f=t("https://www.bilibili.com/video/BV1PJ411n7xZ"),x=n('<p>\u53CB\u60C5\u63D0\u793A\uFF0C\u5BF9\u4E8E\u627E\u5DE5\u4F5C\u9762\u8BD5\u7684\u5C0F\u4F19\u4F34\uFF0C\u770B p01-p203\u3001p266-301 \u5C31\u591F\u4E86\uFF01</p><p>\u518D\u63A8\u8350\u4E00\u4E2A\u72C2\u795E\u8BF4\u7684\uFF0C40\u591A\u4E07\u7684\u64AD\u653E\u91CF\uFF0C\u7B97\u662F\u4E00\u4E2A\u9762\u5411 JVM \u9762\u8BD5\u7684\u7A81\u51FB\u7248\u3002\u50CF\u4E00\u4E9B\u5E38\u89C1\u7684 JVM \u9762\u8BD5\u9898\uFF0C\u89C6\u9891\u91CC\u90FD\u6709\u8BB2\u5230\uFF0C\u6BD4\u5982\u8BF4\uFF1A</p><ul><li>\u4EC0\u4E48\u662F JVM\uFF1F</li><li>\u8BF4\u4E00\u8BF4\u7C7B\u52A0\u8F7D\u5668\uFF1F</li><li>\u6808\u548C\u5806\u7684\u533A\u522B\u662F\u4EC0\u4E48\uFF1F</li><li>JDK 8 \u548C\u4E4B\u524D\u53D1\u751F\u4E86\u4EC0\u4E48\u53D8\u5316\uFF1F</li><li>\u65B0\u751F\u4EE3\u548C\u8001\u5E74\u4EE3\u662F\u5E72\u561B\u7684\uFF1F</li><li>From\u533A\u548C To\u533A\u4EC0\u4E48\u533A\u522B\uFF1F</li><li>\u5982\u4F55\u6392\u67E5 OOM\uFF1F</li><li>\u8BF4\u8BF4\u5783\u573E\u56DE\u6536\u7B97\u6CD5</li><li>\u8BF4\u8BF4 JVM \u5185\u5B58\u7ED3\u6784</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/jvm-be0910d8-7669-46cb-b8b9-2399162e723d.png" alt=""></p>',4),k=t("\u89C6\u9891\u5730\u5740\uFF1A"),V={href:"https://www.bilibili.com/video/BV1iJ411d7jS",target:"_blank",rel:"noopener noreferrer"},M=t("https://www.bilibili.com/video/BV1iJ411d7jS"),w=e("p",null,[e("strong",null,"3\uFF09\u4E66\u7C4D")],-1),B=t("\u7EB8\u8D28\u4E66\u53EA\u63A8\u8350\u4E00\u672C\u5468\u5FD7\u660E\u8001\u5E08\u7684\u795E\u4E66\u300A"),E={href:"https://book.douban.com/subject/34907497/",target:"_blank",rel:"noopener noreferrer"},q=t("\u6DF1\u5165\u7406\u89E3 Java \u865A\u62DF\u673A"),O=t("\u300B\uFF0C\u57FA\u672C\u4E0A\u5B66\u4E60 JVM \u7684\u5C0F\u4F19\u4F34\u4EBA\u624B\u4E00\u672C\u3002"),T=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/jvm-3f6065c5-2fbf-4107-804e-393b32a4f9ab.png",alt:""})],-1),F=e("p",null,"\u8FD9\u662F\u4E00\u90E8\u4ECE\u5DE5\u4F5C\u539F\u7406\u548C\u5DE5\u7A0B\u5B9E\u8DF5\u4E24\u4E2A\u7EF4\u5EA6\u6DF1\u5165\u5256\u6790JVM\u7684\u8457\u4F5C\uFF0C\u662F\u8BA1\u7B97\u673A\u9886\u57DF\u516C\u8BA4\u7684\u7ECF\u5178\u3002",-1),G=e("p",null,"\u5168\u4E66\u5206\u4E3A\u4E94\u4E2A\u90E8\u5206\uFF0C\u7B2C\u4E00\u90E8\u5206\u4E3A\u8D70\u8FD1 Java\uFF0C\u4E3B\u8981\u662F\u5BF9 JVM \u7684\u53D1\u5C55\u5386\u53F2\u8FDB\u884C\u4E86\u4ECB\u7ECD\uFF0C\u5176\u4E2D\u7B2C\u4E8C\u90E8\u5206\u81EA\u52A8\u5185\u5B58\u7BA1\u7406\u548C\u7B2C\u4E09\u90E8\u5206\u865A\u62DF\u673A\u6267\u884C\u5B50\u7CFB\u7EDF\u9700\u8981\u91CD\u70B9\u638C\u63E1\uFF0C\u8FD9\u4E24\u90E8\u5206\u7684\u5185\u5BB9\u4E5F\u662F\u6700\u591A\u7684\u3002",-1),N=t("\u7B2C\u56DB\u90E8\u5206\u7A0B\u5E8F\u7F16\u8BD1\u4E0E\u4EE3\u7801\u4F18\u5316\u4E2D\u9700\u8981\u91CD\u70B9\u638C\u63E1\u7684\u662F JIT \u90E8\u5206\uFF0C\u7B2C\u4E94\u90E8\u5206\u9AD8\u6548\u5E76\u53D1\u6700\u597D\u548C"),z={href:"https://t.zsxq.com/iYRNrJu",target:"_blank",rel:"noopener noreferrer"},I=t("Java \u5E76\u53D1\u7F16\u7A0B"),A=t("\uFF08\u6211\u524D\u9762\u4E5F\u505A\u4E86\u5B66\u4E60\u8DEF\u7EBF\u7684\u603B\u7ED3\uFF09\u8FD9\u5757\u5185\u5BB9\u7ED3\u5408\u8D77\u6765\u5B66\u4E60\u3002"),C=e("p",null,"\u53EF\u4EE5\u914D\u5408 GitHub \u4E0A\u8FD9\u4E2A\u5F00\u6E90\u7684\u9605\u8BFB\u7B14\u8BB0\u5B66\u4E60\uFF1A",-1),D={href:"https://github.com/TangBean/understanding-the-jvm",target:"_blank",rel:"noopener noreferrer"},S=t("https://github.com/TangBean/understanding-the-jvm"),H=e("p",null,[e("strong",null,"4\uFF09\u5F00\u6E90\u7535\u5B50\u4E66")],-1),P=t("\u63A8\u8350 doocs \u793E\u533A\u7684 "),y={href:"https://doocs.github.io/jvm/",target:"_blank",rel:"noopener noreferrer"},Z=t("JVM \u5E95\u5C42\u539F\u7406\u6700\u5168\u77E5\u8BC6\u603B\u7ED3"),K=t("\uFF0C\u7B97\u662F\u300A\u6DF1\u5165\u7406\u89E3 Java \u865A\u62DF\u673A\u300B\u8FD9\u672C\u4E66\u7684\u4E00\u4E2A\u7CBE\u7B80\u77E5\u8BC6\u70B9\u68B3\u7406\u3002"),L=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/jvm-f2e2e5c4-c193-4af5-b1bc-fea8df2006af.png",alt:""})],-1),R=t("GitHub \u5730\u5740\uFF1A"),U={href:"https://github.com/doocs/jvm",target:"_blank",rel:"noopener noreferrer"},X=t("https://github.com/doocs/jvm"),Y=e("p",null,[t("\u8003\u8651\u5230\u6709\u4E9B\u5C0F\u4F19\u4F34\u53EF\u80FD\u9700\u8981 PDF \u7248\u672C\uFF0C\u6211\u90FD\u6574\u7406\u597D\u4E86\uFF0C\u9700\u8981\u7684\u5C0F\u4F19\u4F34\u8BF7\u626B\u63CF\u4E0B\u65B9\u7684\u4E8C\u7EF4\u7801\u5173\u6CE8\u4F5C\u8005\u7684\u539F\u521B\u516C\u4F17\u53F7\u300C"),e("strong",null,"\u6C89\u9ED8\u738B\u4E8C"),t("\u300D\u56DE\u590D\u5173\u952E\u5B57\u300C"),e("strong",null,"java"),t("\u300D\u5C31\u53EF\u4EE5\u62C9\u53D6\u5230\u4E86\u3002")],-1),Q=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongzhonghao.png",alt:"\u626B\u7801\u5173\u6CE8\u540E\u56DE\u590D\u300Cjava\u300D\u5173\u952E\u5B57"})],-1),W=e("p",null,"\u518D\u63A8\u8350\u4E00\u4EFD GitHub \u4E0A\u5F00\u6E90\u7684 Java 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l(),i("div",null,[h,e("blockquote",null,[e("p",null,[e("a",c,[d,a(o)])])]),b,p,u,v,m,g,e("blockquote",null,[e("p",null,[j,e("a",J,[f,a(o)])])]),x,e("blockquote",null,[e("p",null,[k,e("a",V,[M,a(o)])])]),w,e("p",null,[B,e("a",E,[q,a(o)]),O]),T,F,G,e("p",null,[N,e("a",z,[I,a(o)]),A]),C,e("blockquote",null,[e("p",null,[e("a",D,[S,a(o)])])]),H,e("p",null,[P,e("a",y,[Z,a(o)]),K]),L,e("blockquote",null,[e("p",null,[R,e("a",U,[X,a(o)])])]),Y,Q,W,e("blockquote",null,[e("p",null,[e("a",$,[ee,a(o)])])]),te,oe,ae,ne,e("p",null,[re,e("a",se,[le,a(o)]),ie]),_e,e("p",null,[he,e("a",ce,[de,a(o)]),be]),pe,ue,e("blockquote",null,[e("p",null,[e("a",ve,[me,a(o)])])]),ge,e("blockquote",null,[e("p",null,[e("a",je,[Je,a(o)])])]),fe,xe,ke,Ve,Me,e("p",null,[e("a",we,[Be,a(o)]),Ee]),e("ul",null,[e("li",null,[e("a",qe,[Oe,a(o)]),Te]),e("li",null,[Fe,e("a",Ge,[Ne,a(o)]),ze]),Ie,Ae]),Ce,e("p",null,[De,e("a",Se,[He,a(o)]),Pe,e("a",ye,[Ze,a(o)]),Ke,e("a",Le,[Re,a(o)]),Ue,e("a",Xe,[Ye,a(o)]),Qe]),e("p",null,[We,e("a",$e,[et,a(o)]),tt,e("a",ot,[at,a(o)]),nt]),rt,st,e("blockquote",null,[e("p",null,[e("a",lt,[it,a(o)])])]),_t,ht,e("ul",null,[e("li",null,[ct,e("a",dt,[bt,a(o)])]),e("li",null,[pt,e("a",ut,[vt,a(o)])])]),mt,gt,jt,Jt])}var wt=r(_,[["render",ft],["__file","jvm.html.vue"]]);export{wt as default};
+import{_ as r}from"./plugin-vue_export-helper.21dcd24c.js";import{r as s,o as l,c as i,a as e,b as a,e as n,d as t}from"./app.615e41d8.js";const _={},h=n('<h1 id="java\u865A\u62DF\u673A\u5B66\u4E60\u8DEF\u7EBF-\u5EFA\u8BAE\u6536\u85CF" tabindex="-1"><a class="header-anchor" href="#java\u865A\u62DF\u673A\u5B66\u4E60\u8DEF\u7EBF-\u5EFA\u8BAE\u6536\u85CF" aria-hidden="true">#</a> Java\u865A\u62DF\u673A\u5B66\u4E60\u8DEF\u7EBF\uFF08\u5EFA\u8BAE\u6536\u85CF\u{1F44D}\uFF09</h1><p>2020 \u5E74\u7684\u65F6\u5019\uFF0C\u901A\u8BFB\u4E86\u4E00\u904D\u5468\u5FD7\u660E\u8001\u5E08\u7684\u300A\u6DF1\u5165\u7406\u89E3 Java \u865A\u62DF\u673A\uFF1AJVM \u9AD8\u7EA7\u7279\u6027\u4E0E\u6700\u4F73\u5B9E\u8DF5\u300B\u7B2C\u4E09\u7248\uFF0C\u8BFB\u5B8C\u4E4B\u540E\u53D7\u76CA\u532A\u6D45\uFF0C\u8FD9\u8BA9\u6211\u5BF9 Java \u865A\u62DF\u673A\u6709\u4E86\u4E00\u4E2A\u66F4\u5B8C\u6574\u7684\u8BA4\u8BC6\u3002\u6BEB\u65E0\u7591\u95EE\uFF0C\u300A\u6DF1\u5165\u7406\u89E3 Java \u865A\u62DF\u673A\u300B\u662F JVM \u4E66\u7C4D\u4E2D\u6700\u597D\u7684\u4E00\u672C\u4E66\u4E86\uFF0C\u56FD\u4EA7\u6280\u672F\u4E66\u7684\u5929\u82B1\u677F\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/jvm-7036a048-4034-4965-92a6-e35d0211ba71.png" alt=""></p><p>\u5728\u91D1\u4E09\u94F6\u56DB/\u91D1\u4E5D\u94F6\u5341\u7684\u8DF3\u69FD\u5B63\u4E2D\uFF0C\u5F88\u591A\u5C0F\u4F19\u4F34\u90FD\u4F1A\u5FCD\u4E0D\u4F4F\u8822\u8822\u6B32\u52A8\uFF0C\u5176\u4E2D JVM \u66F4\u662F\u9762\u8BD5\u4E2D\u4E0D\u53EF\u6216\u7F3A\u7684\u4E00\u90E8\u5206\uFF0C\u6240\u4EE5\u6211\u82B1\u4E86\u51E0\u5929\u7684\u65F6\u95F4\u6574\u7406\u4E86\u4E00\u6761 JVM \u7684\u5B66\u4E60\u8DEF\u7EBF\uFF0C\u5E0C\u671B\u80FD\u5E2E\u52A9\u5230\u5927\u5BB6\u3002</p><h3 id="\u4E00\u3001\u4E3A\u4EC0\u4E48\u8981\u5B66\u4E60-jvm" tabindex="-1"><a class="header-anchor" href="#\u4E00\u3001\u4E3A\u4EC0\u4E48\u8981\u5B66\u4E60-jvm" aria-hidden="true">#</a> \u4E00\u3001\u4E3A\u4EC0\u4E48\u8981\u5B66\u4E60 JVM\uFF1F</h3><p>\u66FE\u7ECF\u6211\u5BF9 JVM \u4E5F\u662F\u611F\u5230\u975E\u5E38\u7684\u5934\u75DB\uFF0C\u5B8C\u5168\u641E\u4E0D\u61C2\u8BE5\u600E\u4E48\u5165\u95E8\uFF0C\u53EA\u662F\u542C\u8BF4\u300A\u6DF1\u5165\u7406\u89E3 Java \u865A\u62DF\u673A\u300B\u8FD9\u672C\u4E66\u5F88\u540A\uFF0C\u4F46\u771F\u8BFB\u8D77\u6765\uFF0C\u5374\u9700\u8981\u6781\u5927\u7684\u8010\u5FC3\u548C\u5B9A\u529B\uFF0C\u5426\u5219\u5F88\u5FEB\u5C31\u4F1A\u5728\u8BFB\u5B8C\u7B2C\u4E00\u7AE0 JVM \u7684\u7B80\u53F2\u540E\u653E\u5F03\u3002</p><p>\u90A3\u9996\u5148\uFF0C\u6211\u4EEC\u5C31\u8981\u641E\u6E05\u695A\uFF0C\u4E3A\u4EC0\u4E48\u8981\u5B66\u4E60 JVM \uFF1F</p><p>\u7B2C\u4E00\uFF0C\u5F53\u7136\u662F\u9762\u8BD5\u8981\u8003\uFF0C\u8FD9\u4E00\u70B9\u6BEB\u65E0\u7591\u95EE\uFF0C\u5C24\u5176\u662F\u5BF9\u4E8E\u8981\u53C2\u52A0\u6821\u62DB\u7684\u5E94\u5C4A\u751F\u6765\u8BF4\uFF0CJVM \u662F\u7ED5\u4E0D\u8FC7\u53BB\u7684\uFF0C\u5FC5\u987B\u5F97\u5B66\u3002</p><p>\u7B2C\u4E8C\uFF0C\u5982\u679C\u4F60\u60F3\u6210\u4E3A\u516C\u53F8\u4E0D\u53EF\u6216\u7F3A\u7684\u9876\u6881\u67F1\uFF0C\u90A3 JVM \u4F60\u5F97\u5B66\uFF0C\u56E0\u4E3A\u4E00\u822C\u60C5\u51B5\u4E0B\uFF0C\u9047\u5230\u7684\u95EE\u9898\u57FA\u672C\u4E0A Google \u4E0B\u5C31\u80FD\u89E3\u51B3\u4E86\uFF0C\u53EF\u4E00\u65E6\u9047\u5230 JVM \u6027\u80FD\u8C03\u4F18\uFF0C\u5C31\u5FC5\u987B\u5F97\u6709\u80FD\u67E5 OOM \u7684\u539F\u56E0\u3001\u80FD\u770B\u61C2\u5B57\u8282\u7801\u7684\u8001\u9E1F\u51FA\u9A6C\u4E86\u3002</p><p>\u5E94\u7528\u7A0B\u5E8F\u4E00\u65E6\u4E0A\u7EBF\uFF0C\u51FA\u95EE\u9898\u662F\u677F\u4E0A\u9489\u9489\u7684\u4E8B\uFF0C\u9664\u4E86\u6570\u636E\u5E93\u3001\u7F51\u7EDC\u3001\u4EE3\u7801\u903B\u8F91\u4E0A\u7684\u95EE\u9898\uFF0C\u5269\u4E0B\u7684\u5C31\u6709\u5185\u5B58\u6EA2\u51FA\u554A\uFF0C\u9891\u7E41 GC \u5BFC\u81F4\u7684\u6027\u80FD\u74F6\u9888\u554A\u7B49\u68D8\u624B\u95EE\u9898\u3002</p><p>\u9047\u5230\u8FD9\u79CD\u95EE\u9898\uFF0C\u4F60\u5C31\u5FC5\u987B\u5F97\u80FD\u770B\u61C2 GC \u65E5\u5FD7\uFF0C\u660E\u767D\u4EC0\u4E48\u662F\u8001\u5E74\u4EE3\u3001\u6C38\u4E45\u4EE3\u3001\u5143\u6570\u636E\u533A\u7B49\uFF0C\u8FD9\u4E9B\u90FD\u662F Java \u865A\u62DF\u673A\u65B9\u9762\u7684\u77E5\u8BC6\u3002</p><p>\u660E\u767D\u4E86\u5B66\u4E60 JVM \u7684\u91CD\u8981\u6027\uFF0C\u90A3\u6211\u4EEC\u5C31\u5F00\u641E\u5427\uFF01</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/jvm-4cbbdc72-3bdd-4b14-9d8d-ecd7764afb11.png" alt=""></p><h3 id="\u4E8C\u3001jvm-\u5B66\u4E60\u8DEF\u7EBF\u56FE" tabindex="-1"><a class="header-anchor" href="#\u4E8C\u3001jvm-\u5B66\u4E60\u8DEF\u7EBF\u56FE" aria-hidden="true">#</a> \u4E8C\u3001JVM \u5B66\u4E60\u8DEF\u7EBF\u56FE</h3><p>\u8FD9\u662F\u6211\u6700\u8FD1\u6574\u7406\u7684\u4E00\u5F20\u5173\u4E8E JVM \u7684\u601D\u7EF4\u5BFC\u56FE\uFF0C\u5927\u7684\u65B9\u5411\u53EF\u4EE5\u5206\u4E3A\u4E09\u4E2A\u90E8\u5206\uFF1A\u5B57\u8282\u7801\u4E0E\u7C7B\u7684\u52A0\u8F7D\u3001\u5185\u5B58\u4E0E\u5783\u573E\u56DE\u6536\u3001\u6027\u80FD\u76D1\u63A7\u548C\u8C03\u4F18\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/jvm-b4ec034b-9f20-40b9-a2a3-e77afffd2abf.png" alt=""></p><p>\u5B57\u8282\u7801\u4E0E\u7C7B\u7684\u52A0\u8F7D\u5305\u62EC\uFF1A</p><ul><li>\u7C7B\u7684\u52A0\u8F7D\u673A\u5236\uFF08\u7C7B\u7684\u52A0\u8F7D\u8FC7\u7A0B\u3001\u7C7B\u52A0\u8F7D\u5668\u3001\u53CC\u4EB2\u59D4\u6D3E\u6A21\u578B\uFF09</li><li>\u5B57\u8282\u7801\uFF08\u7C7B\u6587\u4EF6\u7ED3\u6784\u3001\u5B57\u8282\u7801\u6307\u4EE4\u3001\u5B57\u8282\u7801\u6267\u884C\u5F15\u64CE\u3001\u5B9E\u6218\u5B57\u8282\u7801\uFF09</li></ul><p>\u5185\u5B58\u4E0E\u5783\u573E\u56DE\u6536\u5305\u62EC\uFF1A</p><ul><li>JVM \u5185\u5B58\u7ED3\u6784</li><li>\u5783\u573E\u56DE\u6536\u7B97\u6CD5</li><li>\u5783\u573E\u56DE\u6536\u673A\u5236</li><li>\u5783\u573E\u6536\u96C6\u5668</li></ul><p>\u6027\u80FD\u76D1\u63A7\u548C\u8C03\u4F18\u5305\u62EC\uFF1A</p><ul><li>\u8C03\u4F18\u6307\u6807</li><li>\u8C03\u4F18\u5BF9\u8C61</li><li>\u8C03\u4F18\u5DE5\u5177</li><li>JIT \u4F18\u5316</li></ul><p>\u6709\u7406\u8BBA\u77E5\u8BC6\uFF0C\u6709\u52A8\u624B\u5B9E\u6218\uFF0C\u57FA\u672C\u4E0A\u53EF\u4EE5\u628A JVM \u8FD9\u5757\u5B66\u7684\u975E\u5E38\u624E\u5B9E\u4E86\u3002</p><h3 id="\u4E09\u3001\u786C\u6838-jvm-\u5B66\u4E60\u8D44\u6599" tabindex="-1"><a class="header-anchor" href="#\u4E09\u3001\u786C\u6838-jvm-\u5B66\u4E60\u8D44\u6599" aria-hidden="true">#</a> \u4E09\u3001\u786C\u6838 JVM \u5B66\u4E60\u8D44\u6599</h3><p><strong>1\uFF09Java \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF</strong></p><p>\u5B66 Java\uFF0C\u600E\u4E48\u80FD\u5C11\u5F97\u4E86\u4E8C\u54E5\u7684\u5C0F\u7834\u7AD9\u300AJava \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF\u300B\uFF0C\u7F51\u5740\u6211\u8D34\u4E0B\u9762\u4E86\u54C8\uFF1A</p>',26),c={href:"https://tobebetterjavaer.com/home.html#java%E8%99%9A%E6%8B%9F%E6%9C%BA",target:"_blank",rel:"noopener noreferrer"},d=t("https://tobebetterjavaer.com/home.html#java\u865A\u62DF\u673A"),b=e("p",null,"\u8FDB\u53BB\u76F4\u63A5\u627E\u300CJava \u6838\u5FC3\u300D\u91CC\u9762\u7684 Java \u865A\u62DF\u673A\u5C31\u5BF9\u4E86\u3002\u6211\u6309\u7167\u524D\u9762\u7684\u601D\u7EF4\u5BFC\u56FE\u6574\u7406\u4E86 19 \u7BC7\u6587\u7AE0\uFF0C\u5168\u90E8\u90FD\u662F\u786C\u6838\u7EA7\u522B\u7684\uFF0C\u8DDF\u7740\u5B66\u5C31\u5BF9\u4E86\u3002",-1),p=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/jvm-cc84fead-278b-46aa-a8ab-a3b07acefc12.png",alt:""})],-1),u=e("p",null,[e("strong",null,"2\uFF09\u89C6\u9891")],-1),v=e("p",null,"\u61C2\u7684\u90FD\u61C2\uFF0C\u770B\u89C6\u9891\u5230 B 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diff --git a/dist/assets/jvm.html.86668e04.js b/dist/assets/jvm.html.c049e00d.js
similarity index 99%
rename from dist/assets/jvm.html.86668e04.js
rename to dist/assets/jvm.html.c049e00d.js
index 4701030c..d6062aec 100644
--- a/dist/assets/jvm.html.86668e04.js
+++ b/dist/assets/jvm.html.c049e00d.js
@@ -1,4 +1,4 @@
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noreferrer"},b=a("\u539F\u6587\u94FE\u63A5"),h=a("\u3002"),k=i(`<h2 id="\u4E00\u3001\u5F15\u8A00" tabindex="-1"><a class="header-anchor" href="#\u4E00\u3001\u5F15\u8A00" aria-hidden="true">#</a> \u4E00\u3001\u5F15\u8A00</h2><h3 id="_1-\u4EC0\u4E48\u662F-jvm" tabindex="-1"><a class="header-anchor" href="#_1-\u4EC0\u4E48\u662F-jvm" aria-hidden="true">#</a> 1.\u4EC0\u4E48\u662F JVM?</h3><p>JVM\u2014\u2014Java \u865A\u62DF\u673A\uFF0C\u5B83\u662F Java \u5B9E\u73B0\u5E73\u53F0\u65E0\u5173\u6027\u7684\u57FA\u77F3\u3002</p><p>Java \u7A0B\u5E8F\u8FD0\u884C\u7684\u65F6\u5019\uFF0C\u7F16\u8BD1\u5668\u5C06 Java \u6587\u4EF6\u7F16\u8BD1\u6210\u5E73\u53F0\u65E0\u5173\u7684 Java \u5B57\u8282\u7801\u6587\u4EF6\uFF08.class\uFF09,\u63A5\u4E0B\u6765\u5BF9\u5E94\u5E73\u53F0 JVM \u5BF9\u5B57\u8282\u7801\u6587\u4EF6\u8FDB\u884C\u89E3\u91CA\uFF0C\u7FFB\u8BD1\u6210\u5BF9\u5E94\u5E73\u53F0\u5339\u914D\u7684\u673A\u5668\u6307\u4EE4\u5E76\u8FD0\u884C\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/jvm-1.png" alt="Java\u8BED\u8A00\u7F16\u8BD1\u8FD0\u884C"></p><p>\u540C\u65F6 JVM \u4E5F\u662F\u4E00\u4E2A\u8DE8\u8BED\u8A00\u7684\u5E73\u53F0\uFF0C\u548C\u8BED\u8A00\u65E0\u5173\uFF0C\u53EA\u548C class \u7684\u6587\u4EF6\u683C\u5F0F\u5173\u8054\uFF0C\u4EFB\u4F55\u8BED\u8A00\uFF0C\u53EA\u8981\u80FD\u7FFB\u8BD1\u6210\u7B26\u5408\u89C4\u8303\u7684\u5B57\u8282\u7801\u6587\u4EF6\uFF0C\u90FD\u80FD\u88AB JVM \u8FD0\u884C\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/jvm-2.png" alt="JVM\u8DE8\u8BED\u8A00"></p><h2 id="\u4E8C\u3001\u5185\u5B58\u7BA1\u7406" tabindex="-1"><a class="header-anchor" href="#\u4E8C\u3001\u5185\u5B58\u7BA1\u7406" aria-hidden="true">#</a> \u4E8C\u3001\u5185\u5B58\u7BA1\u7406</h2><h3 id="_2-\u80FD\u8BF4\u4E00\u4E0B-jvm-\u7684\u5185\u5B58\u533A\u57DF\u5417" tabindex="-1"><a class="header-anchor" href="#_2-\u80FD\u8BF4\u4E00\u4E0B-jvm-\u7684\u5185\u5B58\u533A\u57DF\u5417" aria-hidden="true">#</a> 2.\u80FD\u8BF4\u4E00\u4E0B JVM \u7684\u5185\u5B58\u533A\u57DF\u5417\uFF1F</h3><p>JVM \u5185\u5B58\u533A\u57DF\u6700\u7C97\u7565\u7684\u5212\u5206\u53EF\u4EE5\u5206\u4E3A<code>\u5806</code>\u548C<code>\u6808</code>\uFF0C\u5F53\u7136\uFF0C\u6309\u7167\u865A\u62DF\u673A\u89C4\u8303\uFF0C\u53EF\u4EE5\u5212\u5206\u4E3A\u4EE5\u4E0B\u51E0\u4E2A\u533A\u57DF\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/jvm-3.png" alt="Java\u865A\u62DF\u673A\u8FD0\u884C\u65F6\u6570\u636E\u533A"></p><p>JVM \u5185\u5B58\u5206\u4E3A\u7EBF\u7A0B\u79C1\u6709\u533A\u548C\u7EBF\u7A0B\u5171\u4EAB\u533A\uFF0C\u5176\u4E2D<code>\u65B9\u6CD5\u533A</code>\u548C<code>\u5806</code>\u662F\u7EBF\u7A0B\u5171\u4EAB\u533A\uFF0C<code>\u865A\u62DF\u673A\u6808</code>\u3001<code>\u672C\u5730\u65B9\u6CD5\u6808</code>\u548C<code>\u7A0B\u5E8F\u8BA1\u6570\u5668</code>\u662F\u7EBF\u7A0B\u9694\u79BB\u7684\u6570\u636E\u533A\u3002</p><p><strong>1\uFF09\u7A0B\u5E8F\u8BA1\u6570\u5668</strong></p><p>\u7A0B\u5E8F\u8BA1\u6570\u5668\uFF08Program Counter Register\uFF09\u4E5F\u88AB\u79F0\u4E3A PC \u5BC4\u5B58\u5668\uFF0C\u662F\u4E00\u5757\u8F83\u5C0F\u7684\u5185\u5B58\u7A7A\u95F4\u3002</p><p>\u5B83\u53EF\u4EE5\u770B\u4F5C\u662F\u5F53\u524D\u7EBF\u7A0B\u6240\u6267\u884C\u7684\u5B57\u8282\u7801\u7684\u884C\u53F7\u6307\u793A\u5668\u3002</p><p><strong>2\uFF09Java \u865A\u62DF\u673A\u6808</strong></p><p>Java \u865A\u62DF\u673A\u6808\uFF08Java Virtual Machine Stack\uFF09\u4E5F\u662F\u7EBF\u7A0B\u79C1\u6709\u7684\uFF0C\u5B83\u7684\u751F\u547D\u5468\u671F\u4E0E\u7EBF\u7A0B\u76F8\u540C\u3002</p><p>Java \u865A\u62DF\u673A\u6808\u63CF\u8FF0\u7684\u662F Java \u65B9\u6CD5\u6267\u884C\u7684\u7EBF\u7A0B\u5185\u5B58\u6A21\u578B\uFF1A\u65B9\u6CD5\u6267\u884C\u65F6\uFF0CJVM \u4F1A\u540C\u6B65\u521B\u5EFA\u4E00\u4E2A\u6808\u5E27\uFF0C\u7528\u6765\u5B58\u50A8\u5C40\u90E8\u53D8\u91CF\u8868\u3001\u64CD\u4F5C\u6570\u6808\u3001\u52A8\u6001\u8FDE\u63A5\u7B49\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/jvm-4.png" alt="Java\u865A\u62DF\u673A\u6808"></p><p><strong>3\uFF09\u672C\u5730\u65B9\u6CD5\u6808</strong></p><p>\u672C\u5730\u65B9\u6CD5\u6808\uFF08Native Method Stacks\uFF09\u4E0E\u865A\u62DF\u673A\u6808\u6240\u53D1\u6325\u7684\u4F5C\u7528\u662F\u975E\u5E38\u76F8\u4F3C\u7684\uFF0C\u5176\u533A\u522B\u53EA\u662F\u865A\u62DF\u673A\u6808\u4E3A\u865A\u62DF\u673A\u6267\u884C Java \u65B9\u6CD5\uFF08\u4E5F\u5C31\u662F\u5B57\u8282\u7801\uFF09\u670D\u52A1\uFF0C\u800C\u672C\u5730\u65B9\u6CD5\u6808\u5219\u662F\u4E3A\u865A\u62DF\u673A\u4F7F\u7528\u5230\u7684\u672C\u5730\uFF08Native\uFF09\u65B9\u6CD5\u670D\u52A1\u3002</p><p>Java \u865A\u62DF\u673A\u89C4\u8303\u5141\u8BB8\u672C\u5730\u65B9\u6CD5\u6808\u88AB\u5B9E\u73B0\u6210\u56FA\u5B9A\u5927\u5C0F\u7684\u6216\u8005\u662F\u6839\u636E\u8BA1\u7B97\u52A8\u6001\u6269\u5C55\u548C\u6536\u7F29\u7684\u3002</p><p><strong>4\uFF09Java \u5806</strong></p><p>\u5BF9\u4E8E Java \u5E94\u7528\u7A0B\u5E8F\u6765\u8BF4\uFF0CJava \u5806\uFF08Java Heap\uFF09\u662F\u865A\u62DF\u673A\u6240\u7BA1\u7406\u7684\u5185\u5B58\u4E2D\u6700\u5927\u7684\u4E00\u5757\u3002Java \u5806\u662F\u88AB\u6240\u6709\u7EBF\u7A0B\u5171\u4EAB\u7684\u4E00\u5757\u5185\u5B58\u533A\u57DF\uFF0C\u5728\u865A\u62DF\u673A\u542F\u52A8\u65F6\u521B\u5EFA\u3002\u6B64\u5185\u5B58\u533A\u57DF\u7684\u552F\u4E00\u76EE\u7684\u5C31\u662F\u5B58\u653E\u5BF9\u8C61\u5B9E\u4F8B\uFF0CJava \u91CC\u201C<strong>\u51E0\u4E4E</strong>\u201D\u6240\u6709\u7684\u5BF9\u8C61\u5B9E\u4F8B\u90FD\u5728\u8FD9\u91CC\u5206\u914D\u5185\u5B58\u3002</p><p>Java \u5806\u662F\u5783\u573E\u6536\u96C6\u5668\u7BA1\u7406\u7684\u5185\u5B58\u533A\u57DF\uFF0C\u56E0\u6B64\u4E00\u4E9B\u8D44\u6599\u4E2D\u5B83\u4E5F\u88AB\u79F0\u4F5C\u201CGC \u5806\u201D\uFF08Garbage Collected Heap\uFF0C\uFF09\u3002\u4ECE\u56DE\u6536\u5185\u5B58\u7684\u89D2\u5EA6\u770B\uFF0C\u7531\u4E8E\u73B0\u4EE3\u5783\u573E\u6536\u96C6\u5668\u5927\u90E8\u5206\u90FD\u662F\u57FA\u4E8E\u5206\u4EE3\u6536\u96C6\u7406\u8BBA\u8BBE\u8BA1\u7684\uFF0C\u6240\u4EE5 Java \u5806\u4E2D\u7ECF\u5E38\u4F1A\u51FA\u73B0<code>\u65B0\u751F\u4EE3</code>\u3001<code>\u8001\u5E74\u4EE3</code>\u3001<code>Eden\u7A7A\u95F4</code>\u3001<code>From Survivor\u7A7A\u95F4</code>\u3001<code>To Survivor\u7A7A\u95F4</code>\u7B49\u540D\u8BCD\uFF0C\u9700\u8981\u6CE8\u610F\u7684\u662F\u8FD9\u79CD\u5212\u5206\u53EA\u662F\u6839\u636E\u5783\u573E\u56DE\u6536\u673A\u5236\u6765\u8FDB\u884C\u7684\u5212\u5206\uFF0C\u4E0D\u662F Java \u865A\u62DF\u673A\u89C4\u8303\u672C\u8EAB\u5236\u5B9A\u7684\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/jvm-5.png" alt="Java \u5806\u5185\u5B58\u7ED3\u6784"></p><p><strong>5\uFF09\u65B9\u6CD5\u533A</strong></p><p>\u65B9\u6CD5\u533A\u662F\u6BD4\u8F83\u7279\u522B\u7684\u4E00\u5757\u533A\u57DF\uFF0C\u548C\u5806\u7C7B\u4F3C\uFF0C\u5B83\u4E5F\u662F\u5404\u4E2A\u7EBF\u7A0B\u5171\u4EAB\u7684\u5185\u5B58\u533A\u57DF\uFF0C\u7528\u4E8E\u5B58\u50A8\u5DF2\u88AB\u865A\u62DF\u673A\u52A0\u8F7D\u7684\u7C7B\u578B\u4FE1\u606F\u3001\u5E38\u91CF\u3001\u9759\u6001\u53D8\u91CF\u3001\u5373\u65F6\u7F16\u8BD1\u5668\u7F16\u8BD1\u540E\u7684\u4EE3\u7801\u7F13\u5B58\u7B49\u6570\u636E\u3002</p><p>\u5B83\u7279\u522B\u5728 Java \u865A\u62DF\u673A\u89C4\u8303\u5BF9\u5B83\u7684\u7EA6\u675F\u975E\u5E38\u5BBD\u677E\uFF0C\u6240\u4EE5\u65B9\u6CD5\u533A\u7684\u5177\u4F53\u5B9E\u73B0\u5386\u7ECF\u4E86\u8BB8\u591A\u53D8\u8FC1\uFF0C\u4F8B\u5982 jdk1.7 \u4E4B\u524D\u4F7F\u7528\u6C38\u4E45\u4EE3\u4F5C\u4E3A\u65B9\u6CD5\u533A\u7684\u5B9E\u73B0\u3002</p><h3 id="_3-\u8BF4\u4E00\u4E0B-jdk1-6\u30011-7\u30011-8-\u5185\u5B58\u533A\u57DF\u7684\u53D8\u5316" tabindex="-1"><a class="header-anchor" href="#_3-\u8BF4\u4E00\u4E0B-jdk1-6\u30011-7\u30011-8-\u5185\u5B58\u533A\u57DF\u7684\u53D8\u5316" aria-hidden="true">#</a> 3.\u8BF4\u4E00\u4E0B JDK1.6\u30011.7\u30011.8 \u5185\u5B58\u533A\u57DF\u7684\u53D8\u5316\uFF1F</h3><p>JDK1.6\u30011.7/1.8 \u5185\u5B58\u533A\u57DF\u53D1\u751F\u4E86\u53D8\u5316\uFF0C\u4E3B\u8981\u4F53\u73B0\u5728\u65B9\u6CD5\u533A\u7684\u5B9E\u73B0\uFF1A</p><ul><li>JDK1.6 \u4F7F\u7528\u6C38\u4E45\u4EE3\u5B9E\u73B0\u65B9\u6CD5\u533A\uFF1A</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/jvm-6.png" alt="JDK 1.6\u5185\u5B58\u533A\u57DF"></p><ul><li>JDK1.7 \u65F6\u53D1\u751F\u4E86\u4E00\u4E9B\u53D8\u5316\uFF0C\u5C06\u5B57\u7B26\u4E32\u5E38\u91CF\u6C60\u3001\u9759\u6001\u53D8\u91CF\uFF0C\u5B58\u653E\u5728\u5806\u4E0A</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/jvm-7.png" alt="JDK 1.7\u5185\u5B58\u533A\u57DF"></p><ul><li>\u5728 JDK1.8 \u65F6\u5F7B\u5E95\u5E72\u6389\u4E86\u6C38\u4E45\u4EE3\uFF0C\u800C\u5728\u76F4\u63A5\u5185\u5B58\u4E2D\u5212\u51FA\u4E00\u5757\u533A\u57DF\u4F5C\u4E3A<strong>\u5143\u7A7A\u95F4</strong>\uFF0C\u8FD0\u884C\u65F6\u5E38\u91CF\u6C60\u3001\u7C7B\u5E38\u91CF\u6C60\u90FD\u79FB\u52A8\u5230\u5143\u7A7A\u95F4\u3002</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/jvm-8.png" alt="JDK 1.8\u5185\u5B58\u533A\u57DF"></p><h3 id="_4-\u4E3A\u4EC0\u4E48\u4F7F\u7528\u5143\u7A7A\u95F4\u66FF\u4EE3\u6C38\u4E45\u4EE3\u4F5C\u4E3A\u65B9\u6CD5\u533A\u7684\u5B9E\u73B0" tabindex="-1"><a class="header-anchor" href="#_4-\u4E3A\u4EC0\u4E48\u4F7F\u7528\u5143\u7A7A\u95F4\u66FF\u4EE3\u6C38\u4E45\u4EE3\u4F5C\u4E3A\u65B9\u6CD5\u533A\u7684\u5B9E\u73B0" aria-hidden="true">#</a> 4.\u4E3A\u4EC0\u4E48\u4F7F\u7528\u5143\u7A7A\u95F4\u66FF\u4EE3\u6C38\u4E45\u4EE3\u4F5C\u4E3A\u65B9\u6CD5\u533A\u7684\u5B9E\u73B0\uFF1F</h3><p>Java \u865A\u62DF\u673A\u89C4\u8303\u89C4\u5B9A\u7684\u65B9\u6CD5\u533A\u53EA\u662F\u6362\u79CD\u65B9\u5F0F\u5B9E\u73B0\u3002\u6709\u5BA2\u89C2\u548C\u4E3B\u89C2\u4E24\u4E2A\u539F\u56E0\u3002</p><ul><li><p>\u5BA2\u89C2\u4E0A\u4F7F\u7528\u6C38\u4E45\u4EE3\u6765\u5B9E\u73B0\u65B9\u6CD5\u533A\u7684\u51B3\u5B9A\u7684\u8BBE\u8BA1\u5BFC\u81F4\u4E86 Java \u5E94\u7528\u66F4\u5BB9\u6613\u9047\u5230\u5185\u5B58\u6EA2\u51FA\u7684\u95EE\u9898\uFF08\u6C38\u4E45\u4EE3\u6709-XX\uFF1AMaxPermSize \u7684\u4E0A\u9650\uFF0C\u5373\u4F7F\u4E0D\u8BBE\u7F6E\u4E5F\u6709\u9ED8\u8BA4\u5927\u5C0F\uFF0C\u800C J9 \u548C JRockit \u53EA\u8981\u6CA1\u6709\u89E6\u78B0\u5230\u8FDB\u7A0B\u53EF\u7528\u5185\u5B58\u7684\u4E0A\u9650\uFF0C\u4F8B\u5982 32 \u4F4D\u7CFB\u7EDF\u4E2D\u7684 4GB \u9650\u5236\uFF0C\u5C31\u4E0D\u4F1A\u51FA\u95EE\u9898\uFF09\uFF0C\u800C\u4E14\u6709\u6781\u5C11\u6570\u65B9\u6CD5 \uFF08\u4F8B\u5982 String::intern()\uFF09\u4F1A\u56E0\u6C38\u4E45\u4EE3\u7684\u539F\u56E0\u800C\u5BFC\u81F4\u4E0D\u540C\u865A\u62DF\u673A\u4E0B\u6709\u4E0D\u540C\u7684\u8868\u73B0\u3002</p></li><li><p>\u4E3B\u89C2\u4E0A\u5F53 Oracle \u6536\u8D2D BEA \u83B7\u5F97\u4E86 JRockit \u7684\u6240\u6709\u6743\u540E\uFF0C\u51C6\u5907\u628A JRockit \u4E2D\u7684\u4F18\u79C0\u529F\u80FD\uFF0C\u8B6C\u5982 Java Mission Control \u7BA1\u7406\u5DE5\u5177\uFF0C\u79FB\u690D\u5230 HotSpot \u865A\u62DF\u673A\u65F6\uFF0C\u4F46\u56E0\u4E3A\u4E24\u8005\u5BF9\u65B9\u6CD5\u533A\u5B9E\u73B0\u7684\u5DEE\u5F02\u800C\u9762\u4E34\u8BF8\u591A\u56F0\u96BE\u3002\u8003\u8651\u5230 HotSpot \u672A\u6765\u7684\u53D1\u5C55\uFF0C\u5728 JDK 6 \u7684 \u65F6\u5019 HotSpot \u5F00\u53D1\u56E2\u961F\u5C31\u6709\u653E\u5F03\u6C38\u4E45\u4EE3\uFF0C\u9010\u6B65\u6539\u4E3A\u91C7\u7528\u672C\u5730\u5185\u5B58\uFF08Native Memory\uFF09\u6765\u5B9E\u73B0\u65B9\u6CD5\u533A\u7684\u8BA1\u5212\u4E86\uFF0C\u5230\u4E86 JDK 7 \u7684 HotSpot\uFF0C\u5DF2\u7ECF\u628A\u539F\u672C\u653E\u5728\u6C38\u4E45\u4EE3\u7684\u5B57\u7B26\u4E32\u5E38\u91CF\u6C60\u3001\u9759\u6001\u53D8\u91CF\u7B49\u79FB\u51FA\uFF0C\u800C\u5230\u4E86 JDK 8\uFF0C\u7EC8\u4E8E\u5B8C\u5168\u5E9F\u5F03\u4E86\u6C38\u4E45\u4EE3\u7684\u6982\u5FF5\uFF0C\u6539\u7528\u4E0E JRockit\u3001J9 \u4E00\u6837\u5728\u672C\u5730\u5185\u5B58\u4E2D\u5B9E\u73B0\u7684\u5143\u7A7A\u95F4\uFF08Meta-space\uFF09\u6765\u4EE3\u66FF\uFF0C\u628A JDK 7 \u4E2D\u6C38\u4E45\u4EE3\u8FD8\u5269\u4F59\u7684\u5185\u5BB9\uFF08\u4E3B\u8981\u662F\u7C7B\u578B\u4FE1\u606F\uFF09\u5168\u90E8\u79FB\u5230\u5143\u7A7A\u95F4\u4E2D\u3002</p></li></ul><h3 id="_5-\u5BF9\u8C61\u521B\u5EFA\u7684\u8FC7\u7A0B\u4E86\u89E3\u5417" tabindex="-1"><a class="header-anchor" href="#_5-\u5BF9\u8C61\u521B\u5EFA\u7684\u8FC7\u7A0B\u4E86\u89E3\u5417" aria-hidden="true">#</a> 5.\u5BF9\u8C61\u521B\u5EFA\u7684\u8FC7\u7A0B\u4E86\u89E3\u5417\uFF1F</h3><p>\u5728 JVM \u4E2D\u5BF9\u8C61\u7684\u521B\u5EFA\uFF0C\u6211\u4EEC\u4ECE\u4E00\u4E2A new \u6307\u4EE4\u5F00\u59CB\uFF1A</p><ul><li><p>\u9996\u5148\u68C0\u67E5\u8FD9\u4E2A\u6307\u4EE4\u7684\u53C2\u6570\u662F\u5426\u80FD\u5728\u5E38\u91CF\u6C60\u4E2D\u5B9A\u4F4D\u5230\u4E00\u4E2A\u7C7B\u7684\u7B26\u53F7\u5F15\u7528</p></li><li><p>\u68C0\u67E5\u8FD9\u4E2A\u7B26\u53F7\u5F15\u7528\u4EE3\u8868\u7684\u7C7B\u662F\u5426\u5DF2\u88AB\u52A0\u8F7D\u3001\u89E3\u6790\u548C\u521D\u59CB\u5316\u8FC7\u3002\u5982\u679C\u6CA1\u6709\uFF0C\u5C31\u5148\u6267\u884C\u76F8\u5E94\u7684\u7C7B\u52A0\u8F7D\u8FC7\u7A0B</p></li><li><p>\u7C7B\u52A0\u8F7D\u68C0\u67E5\u901A\u8FC7\u540E\uFF0C\u63A5\u4E0B\u6765\u865A\u62DF\u673A\u5C06\u4E3A\u65B0\u751F\u5BF9\u8C61\u5206\u914D\u5185\u5B58\u3002</p></li><li><p>\u5185\u5B58\u5206\u914D\u5B8C\u6210\u4E4B\u540E\uFF0C\u865A\u62DF\u673A\u5C06\u5206\u914D\u5230\u7684\u5185\u5B58\u7A7A\u95F4\uFF08\u4F46\u4E0D\u5305\u62EC\u5BF9\u8C61\u5934\uFF09\u90FD\u521D\u59CB\u5316\u4E3A\u96F6\u503C\u3002</p></li><li><p>\u63A5\u4E0B\u6765\u8BBE\u7F6E\u5BF9\u8C61\u5934\uFF0C\u8BF7\u6C42\u5934\u91CC\u5305\u542B\u4E86\u5BF9\u8C61\u662F\u54EA\u4E2A\u7C7B\u7684\u5B9E\u4F8B\u3001\u5982\u4F55\u624D\u80FD\u627E\u5230\u7C7B\u7684\u5143\u6570\u636E\u4FE1\u606F\u3001\u5BF9\u8C61\u7684\u54C8\u5E0C\u7801\u3001\u5BF9\u8C61\u7684 GC \u5206\u4EE3\u5E74\u9F84\u7B49\u4FE1\u606F\u3002</p></li></ul><p>\u8FD9\u4E2A\u8FC7\u7A0B\u5927\u6982\u56FE\u793A\u5982\u4E0B\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/jvm-9.png" alt="\u5BF9\u8C61\u521B\u5EFA\u8FC7\u7A0B"></p><h3 id="_6-\u4EC0\u4E48\u662F\u6307\u9488\u78B0\u649E-\u4EC0\u4E48\u662F\u7A7A\u95F2\u5217\u8868" tabindex="-1"><a class="header-anchor" href="#_6-\u4EC0\u4E48\u662F\u6307\u9488\u78B0\u649E-\u4EC0\u4E48\u662F\u7A7A\u95F2\u5217\u8868" aria-hidden="true">#</a> 6.\u4EC0\u4E48\u662F\u6307\u9488\u78B0\u649E\uFF1F\u4EC0\u4E48\u662F\u7A7A\u95F2\u5217\u8868\uFF1F</h3><p>\u5185\u5B58\u5206\u914D\u6709\u4E24\u79CD\u65B9\u5F0F\uFF0C<strong>\u6307\u9488\u78B0\u649E</strong>\uFF08Bump The Pointer\uFF09\u3001<strong>\u7A7A\u95F2\u5217\u8868</strong>\uFF08Free List\uFF09\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/jvm-10.png" alt="\u6307\u9488\u78B0\u649E\u548C\u7A7A\u95F2\u5217\u8868"></p><ul><li>\u6307\u9488\u78B0\u649E\uFF1A\u5047\u8BBE Java \u5806\u4E2D\u5185\u5B58\u662F\u7EDD\u5BF9\u89C4\u6574\u7684\uFF0C\u6240\u6709\u88AB\u4F7F\u7528\u8FC7\u7684\u5185\u5B58\u90FD\u88AB\u653E\u5728\u4E00\u8FB9\uFF0C\u7A7A\u95F2\u7684\u5185\u5B58\u88AB\u653E\u5728\u53E6\u4E00\u8FB9\uFF0C\u4E2D\u95F4\u653E\u7740\u4E00\u4E2A\u6307\u9488\u4F5C\u4E3A\u5206\u754C\u70B9\u7684\u6307\u793A\u5668\uFF0C\u90A3\u6240\u5206\u914D\u5185\u5B58\u5C31\u4EC5\u4EC5\u662F\u628A\u90A3\u4E2A\u6307\u9488\u5411\u7A7A\u95F2\u7A7A\u95F4\u65B9\u5411\u632A\u52A8\u4E00\u6BB5\u4E0E\u5BF9\u8C61\u5927\u5C0F\u76F8\u7B49\u7684\u8DDD\u79BB\uFF0C\u8FD9\u79CD\u5206\u914D\u65B9\u5F0F\u79F0\u4E3A\u201C\u6307\u9488\u78B0\u649E\u201D\u3002</li><li>\u7A7A\u95F2\u5217\u8868\uFF1A\u5982\u679C Java \u5806\u4E2D\u7684\u5185\u5B58\u5E76\u4E0D\u662F\u89C4\u6574\u7684\uFF0C\u5DF2\u88AB\u4F7F\u7528\u7684\u5185\u5B58\u548C\u7A7A\u95F2\u7684\u5185\u5B58\u76F8\u4E92\u4EA4\u9519\u5728\u4E00\u8D77\uFF0C\u90A3\u5C31\u6CA1\u6709\u529E\u6CD5\u7B80\u5355\u5730\u8FDB\u884C\u6307\u9488\u78B0\u649E\u4E86\uFF0C\u865A\u62DF\u673A\u5C31\u5FC5\u987B\u7EF4\u62A4\u4E00\u4E2A\u5217\u8868\uFF0C\u8BB0\u5F55\u4E0A\u54EA\u4E9B\u5185\u5B58\u5757\u662F\u53EF\u7528\u7684\uFF0C\u5728\u5206\u914D\u7684\u65F6\u5019\u4ECE\u5217\u8868\u4E2D\u627E\u5230\u4E00\u5757\u8DB3\u591F\u5927\u7684\u7A7A\u95F4\u5212\u5206\u7ED9\u5BF9\u8C61\u5B9E\u4F8B\uFF0C\u5E76\u66F4\u65B0\u5217\u8868\u4E0A\u7684\u8BB0\u5F55\uFF0C\u8FD9\u79CD\u5206\u914D\u65B9\u5F0F\u79F0\u4E3A\u201C\u7A7A\u95F2\u5217\u8868\u201D\u3002</li><li>\u4E24\u79CD\u65B9\u5F0F\u7684\u9009\u62E9\u7531 Java \u5806\u662F\u5426\u89C4\u6574\u51B3\u5B9A\uFF0CJava \u5806\u662F\u5426\u89C4\u6574\u662F\u7531\u9009\u62E9\u7684\u5783\u573E\u6536\u96C6\u5668\u662F\u5426\u5177\u6709\u538B\u7F29\u6574\u7406\u80FD\u529B\u51B3\u5B9A\u7684\u3002</li></ul><h3 id="_7-jvm-\u91CC-new-\u5BF9\u8C61\u65F6-\u5806\u4F1A\u53D1\u751F\u62A2\u5360\u5417-jvm-\u662F\u600E\u4E48\u8BBE\u8BA1\u6765\u4FDD\u8BC1\u7EBF\u7A0B\u5B89\u5168\u7684" tabindex="-1"><a class="header-anchor" href="#_7-jvm-\u91CC-new-\u5BF9\u8C61\u65F6-\u5806\u4F1A\u53D1\u751F\u62A2\u5360\u5417-jvm-\u662F\u600E\u4E48\u8BBE\u8BA1\u6765\u4FDD\u8BC1\u7EBF\u7A0B\u5B89\u5168\u7684" aria-hidden="true">#</a> 7.JVM \u91CC new \u5BF9\u8C61\u65F6\uFF0C\u5806\u4F1A\u53D1\u751F\u62A2\u5360\u5417\uFF1FJVM \u662F\u600E\u4E48\u8BBE\u8BA1\u6765\u4FDD\u8BC1\u7EBF\u7A0B\u5B89\u5168\u7684\uFF1F</h3><p>\u4F1A\uFF0C\u5047\u8BBE JVM \u865A\u62DF\u673A\u4E0A\uFF0C\u6BCF\u4E00\u6B21 new \u5BF9\u8C61\u65F6\uFF0C\u6307\u9488\u5C31\u4F1A\u5411\u53F3\u79FB\u52A8\u4E00\u4E2A\u5BF9\u8C61 size \u7684\u8DDD\u79BB\uFF0C\u4E00\u4E2A\u7EBF\u7A0B\u6B63\u5728\u7ED9 A \u5BF9\u8C61\u5206\u914D\u5185\u5B58\uFF0C\u6307\u9488\u8FD8\u6CA1\u6709\u6765\u7684\u53CA\u4FEE\u6539\uFF0C\u53E6\u4E00\u4E2A\u4E3A B \u5BF9\u8C61\u5206\u914D\u5185\u5B58\u7684\u7EBF\u7A0B\uFF0C\u53C8\u5F15\u7528\u4E86\u8FD9\u4E2A\u6307\u9488\u6765\u5206\u914D\u5185\u5B58\uFF0C\u8FD9\u5C31\u53D1\u751F\u4E86\u62A2\u5360\u3002</p><p>\u6709\u4E24\u79CD\u53EF\u9009\u65B9\u6848\u6765\u89E3\u51B3\u8FD9\u4E2A\u95EE\u9898\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/jvm-11.png" alt="\u5806\u62A2\u5360\u548C\u89E3\u51B3\u65B9\u6848"></p><ul><li><p>\u91C7\u7528 CAS \u5206\u914D\u91CD\u8BD5\u7684\u65B9\u5F0F\u6765\u4FDD\u8BC1\u66F4\u65B0\u64CD\u4F5C\u7684\u539F\u5B50\u6027</p></li><li><p>\u6BCF\u4E2A\u7EBF\u7A0B\u5728 Java \u5806\u4E2D\u9884\u5148\u5206\u914D\u4E00\u5C0F\u5757\u5185\u5B58\uFF0C\u4E5F\u5C31\u662F\u672C\u5730\u7EBF\u7A0B\u5206\u914D\u7F13\u51B2\uFF08Thread Local Allocation</p><p>Buffer\uFF0CTLAB\uFF09\uFF0C\u8981\u5206\u914D\u5185\u5B58\u7684\u7EBF\u7A0B\uFF0C\u5148\u5728\u672C\u5730\u7F13\u51B2\u533A\u4E2D\u5206\u914D\uFF0C\u53EA\u6709\u672C\u5730\u7F13\u51B2\u533A\u7528\u5B8C\u4E86\uFF0C\u5206\u914D\u65B0\u7684\u7F13\u5B58\u533A\u65F6\u624D\u9700\u8981\u540C\u6B65\u9501\u5B9A\u3002</p></li></ul><h3 id="_8-\u80FD\u8BF4\u4E00\u4E0B\u5BF9\u8C61\u7684\u5185\u5B58\u5E03\u5C40\u5417" tabindex="-1"><a class="header-anchor" href="#_8-\u80FD\u8BF4\u4E00\u4E0B\u5BF9\u8C61\u7684\u5185\u5B58\u5E03\u5C40\u5417" aria-hidden="true">#</a> 8.\u80FD\u8BF4\u4E00\u4E0B\u5BF9\u8C61\u7684\u5185\u5B58\u5E03\u5C40\u5417\uFF1F</h3><p>\u5728 HotSpot \u865A\u62DF\u673A\u91CC\uFF0C\u5BF9\u8C61\u5728\u5806\u5185\u5B58\u4E2D\u7684\u5B58\u50A8\u5E03\u5C40\u53EF\u4EE5\u5212\u5206\u4E3A\u4E09\u4E2A\u90E8\u5206\uFF1A\u5BF9\u8C61\u5934\uFF08Header\uFF09\u3001\u5B9E\u4F8B\u6570\u636E\uFF08Instance Data\uFF09\u548C\u5BF9\u9F50\u586B\u5145\uFF08Padding\uFF09\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/jvm-12.png" alt="\u5BF9\u8C61\u7684\u5B58\u50A8\u5E03\u5C40"></p><p><strong>\u5BF9\u8C61\u5934</strong>\u4E3B\u8981\u7531\u4E24\u90E8\u5206\u7EC4\u6210\uFF1A</p><ul><li>\u7B2C\u4E00\u90E8\u5206\u5B58\u50A8\u5BF9\u8C61\u81EA\u8EAB\u7684\u8FD0\u884C\u65F6\u6570\u636E\uFF1A\u54C8\u5E0C\u7801\u3001GC \u5206\u4EE3\u5E74\u9F84\u3001\u9501\u72B6\u6001\u6807\u5FD7\u3001\u7EBF\u7A0B\u6301\u6709\u7684\u9501\u3001\u504F\u5411\u7EBF\u7A0B ID\u3001\u504F\u5411\u65F6\u95F4\u6233\u7B49\uFF0C\u5B98\u65B9\u79F0\u5B83\u4E3A Mark Word\uFF0C\u5B83\u662F\u4E2A\u52A8\u6001\u7684\u7ED3\u6784\uFF0C\u968F\u7740\u5BF9\u8C61\u72B6\u6001\u53D8\u5316\u3002</li><li>\u7B2C\u4E8C\u90E8\u5206\u662F\u7C7B\u578B\u6307\u9488\uFF0C\u6307\u5411\u5BF9\u8C61\u7684\u7C7B\u5143\u6570\u636E\u7C7B\u578B\uFF08\u5373\u5BF9\u8C61\u4EE3\u8868\u54EA\u4E2A\u7C7B\uFF09\u3002</li><li>\u6B64\u5916\uFF0C\u5982\u679C\u5BF9\u8C61\u662F\u4E00\u4E2A Java \u6570\u7EC4\uFF0C\u90A3\u8FD8\u5E94\u8BE5\u6709\u4E00\u5757\u7528\u4E8E\u8BB0\u5F55\u6570\u7EC4\u957F\u5EA6\u7684\u6570\u636E</li></ul><p><strong>\u5B9E\u4F8B\u6570\u636E</strong>\u7528\u6765\u5B58\u50A8\u5BF9\u8C61\u771F\u6B63\u7684\u6709\u6548\u4FE1\u606F\uFF0C\u4E5F\u5C31\u662F\u6211\u4EEC\u5728\u7A0B\u5E8F\u4EE3\u7801\u91CC\u6240\u5B9A\u4E49\u7684\u5404\u79CD\u7C7B\u578B\u7684\u5B57\u6BB5\u5185\u5BB9\uFF0C\u65E0\u8BBA\u662F\u4ECE\u7236\u7C7B\u7EE7\u627F\u7684\uFF0C\u8FD8\u662F\u81EA\u5DF1\u5B9A\u4E49\u7684\u3002</p><p><strong>\u5BF9\u9F50\u586B\u5145</strong>\u4E0D\u662F\u5FC5\u987B\u7684\uFF0C\u6CA1\u6709\u7279\u522B\u542B\u4E49\uFF0C\u4EC5\u4EC5\u8D77\u7740\u5360\u4F4D\u7B26\u7684\u4F5C\u7528\u3002</p><h3 id="_9-\u5BF9\u8C61\u600E\u4E48\u8BBF\u95EE\u5B9A\u4F4D" tabindex="-1"><a class="header-anchor" href="#_9-\u5BF9\u8C61\u600E\u4E48\u8BBF\u95EE\u5B9A\u4F4D" aria-hidden="true">#</a> 9.\u5BF9\u8C61\u600E\u4E48\u8BBF\u95EE\u5B9A\u4F4D\uFF1F</h3><p>Java \u7A0B\u5E8F\u4F1A\u901A\u8FC7\u6808\u4E0A\u7684 reference \u6570\u636E\u6765\u64CD\u4F5C\u5806\u4E0A\u7684\u5177\u4F53\u5BF9\u8C61\u3002\u7531\u4E8E reference \u7C7B\u578B\u5728\u300AJava \u865A\u62DF\u673A\u89C4\u8303\u300B\u91CC\u9762\u53EA\u89C4\u5B9A\u4E86\u5B83\u662F\u4E00\u4E2A\u6307\u5411\u5BF9\u8C61\u7684\u5F15\u7528\uFF0C\u5E76\u6CA1\u6709\u5B9A\u4E49\u8FD9\u4E2A\u5F15\u7528\u5E94\u8BE5\u901A\u8FC7\u4EC0\u4E48\u65B9\u5F0F\u53BB\u5B9A\u4F4D\u3001\u8BBF\u95EE\u5230\u5806\u4E2D\u5BF9\u8C61\u7684\u5177\u4F53\u4F4D\u7F6E\uFF0C\u6240\u4EE5\u5BF9\u8C61\u8BBF\u95EE\u65B9\u5F0F\u4E5F\u662F\u7531\u865A\u62DF\u673A\u5B9E\u73B0\u800C\u5B9A\u7684\uFF0C\u4E3B\u6D41\u7684\u8BBF\u95EE\u65B9\u5F0F\u4E3B\u8981\u6709\u4F7F\u7528\u53E5\u67C4\u548C\u76F4\u63A5\u6307\u9488\u4E24\u79CD\uFF1A</p><ul><li>\u5982\u679C\u4F7F\u7528\u53E5\u67C4\u8BBF\u95EE\u7684\u8BDD\uFF0CJava \u5806\u4E2D\u5C06\u53EF\u80FD\u4F1A\u5212\u5206\u51FA\u4E00\u5757\u5185\u5B58\u6765\u4F5C\u4E3A\u53E5\u67C4\u6C60\uFF0Creference \u4E2D\u5B58\u50A8\u7684\u5C31\u662F\u5BF9\u8C61\u7684\u53E5\u67C4\u5730\u5740\uFF0C\u800C\u53E5\u67C4\u4E2D\u5305\u542B\u4E86\u5BF9\u8C61\u5B9E\u4F8B\u6570\u636E\u4E0E\u7C7B\u578B\u6570\u636E\u5404\u81EA\u5177\u4F53\u7684\u5730\u5740\u4FE1\u606F\uFF0C\u5176\u7ED3\u6784\u5982\u56FE\u6240\u793A\uFF1A</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/jvm-13.png" alt="\u901A\u8FC7\u53E5\u67C4\u8BBF\u95EE\u5BF9\u8C61"></p><ul><li>\u5982\u679C\u4F7F\u7528\u76F4\u63A5\u6307\u9488\u8BBF\u95EE\u7684\u8BDD\uFF0CJava \u5806\u4E2D\u5BF9\u8C61\u7684\u5185\u5B58\u5E03\u5C40\u5C31\u5FC5\u987B\u8003\u8651\u5982\u4F55\u653E\u7F6E\u8BBF\u95EE\u7C7B\u578B\u6570\u636E\u7684\u76F8\u5173\u4FE1\u606F\uFF0Creference \u4E2D\u5B58\u50A8\u7684\u76F4\u63A5\u5C31\u662F\u5BF9\u8C61\u5730\u5740\uFF0C\u5982\u679C\u53EA\u662F\u8BBF\u95EE\u5BF9\u8C61\u672C\u8EAB\u7684\u8BDD\uFF0C\u5C31\u4E0D\u9700\u8981\u591A\u4E00\u6B21\u95F4\u63A5\u8BBF\u95EE\u7684\u5F00\u9500\uFF0C\u5982\u56FE\u6240\u793A\uFF1A</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/jvm-14.png" alt="\u901A\u8FC7\u76F4\u63A5\u6307\u9488\u8BBF\u95EE\u5BF9\u8C61"></p><p>\u8FD9\u4E24\u79CD\u5BF9\u8C61\u8BBF\u95EE\u65B9\u5F0F\u5404\u6709\u4F18\u52BF\uFF0C\u4F7F\u7528\u53E5\u67C4\u6765\u8BBF\u95EE\u7684\u6700\u5927\u597D\u5904\u5C31\u662F reference \u4E2D\u5B58\u50A8\u7684\u662F\u7A33\u5B9A\u53E5\u67C4\u5730\u5740\uFF0C\u5728\u5BF9\u8C61\u88AB\u79FB\u52A8\uFF08\u5783\u573E\u6536\u96C6\u65F6\u79FB\u52A8\u5BF9\u8C61\u662F\u975E\u5E38\u666E\u904D\u7684\u884C\u4E3A\uFF09\u65F6\u53EA\u4F1A\u6539\u53D8\u53E5\u67C4\u4E2D\u7684\u5B9E\u4F8B\u6570\u636E\u6307\u9488\uFF0C\u800C reference \u672C\u8EAB\u4E0D\u9700\u8981\u88AB\u4FEE\u6539\u3002</p><p>\u4F7F\u7528\u76F4\u63A5\u6307\u9488\u6765\u8BBF\u95EE\u6700\u5927\u7684\u597D\u5904\u5C31\u662F\u901F\u5EA6\u66F4\u5FEB\uFF0C\u5B83\u8282\u7701\u4E86\u4E00\u6B21\u6307\u9488\u5B9A\u4F4D\u7684\u65F6\u95F4\u5F00\u9500\uFF0C\u7531\u4E8E\u5BF9\u8C61\u8BBF\u95EE\u5728 Java \u4E2D\u975E\u5E38\u9891\u7E41\uFF0C\u56E0\u6B64\u8FD9\u7C7B\u5F00\u9500\u79EF\u5C11\u6210\u591A\u4E5F\u662F\u4E00\u9879\u6781\u4E3A\u53EF\u89C2\u7684\u6267\u884C\u6210\u672C\u3002</p><p>HotSpot \u865A\u62DF\u673A\u4E3B\u8981\u4F7F\u7528\u76F4\u63A5\u6307\u9488\u6765\u8FDB\u884C\u5BF9\u8C61\u8BBF\u95EE\u3002</p><h3 id="_10-\u5185\u5B58\u6EA2\u51FA\u548C\u5185\u5B58\u6CC4\u6F0F\u662F\u4EC0\u4E48\u610F\u601D" tabindex="-1"><a class="header-anchor" href="#_10-\u5185\u5B58\u6EA2\u51FA\u548C\u5185\u5B58\u6CC4\u6F0F\u662F\u4EC0\u4E48\u610F\u601D" aria-hidden="true">#</a> 10.\u5185\u5B58\u6EA2\u51FA\u548C\u5185\u5B58\u6CC4\u6F0F\u662F\u4EC0\u4E48\u610F\u601D\uFF1F</h3><p>\u5185\u5B58\u6CC4\u9732\u5C31\u662F\u7533\u8BF7\u7684\u5185\u5B58\u7A7A\u95F4\u6CA1\u6709\u88AB\u6B63\u786E\u91CA\u653E\uFF0C\u5BFC\u81F4\u5185\u5B58\u88AB\u767D\u767D\u5360\u7528\u3002</p><p>\u5185\u5B58\u6EA2\u51FA\u5C31\u662F\u7533\u8BF7\u7684\u5185\u5B58\u8D85\u8FC7\u4E86\u53EF\u7528\u5185\u5B58\uFF0C\u5185\u5B58\u4E0D\u591F\u4E86\u3002</p><p>\u4E24\u8005\u5173\u7CFB\uFF1A\u5185\u5B58\u6CC4\u9732\u53EF\u80FD\u4F1A\u5BFC\u81F4\u5185\u5B58\u6EA2\u51FA\u3002</p><p>\u7528\u4E00\u4E2A\u6709\u5473\u9053\u7684\u6BD4\u55BB\uFF0C\u5185\u5B58\u6EA2\u51FA\u5C31\u662F\u6392\u961F\u53BB\u8E72\u5751\uFF0C\u53D1\u73B0\u6CA1\u5751\u4F4D\u4E86\uFF0C\u5185\u5B58\u6CC4\u6F0F\uFF0C\u5C31\u662F\u6709\u4EBA\u5360\u7740\u8305\u5751\u4E0D\u62C9\u5C4E\uFF0C\u5360\u7740\u8305\u5751\u4E0D\u62C9\u5C4E\u7684\u591A\u4E86\u53EF\u80FD\u4F1A\u5BFC\u81F4\u5751\u4F4D\u4E0D\u591F\u7528\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/jvm-15.png" alt="\u5185\u5B58\u6CC4\u6F0F\u3001\u5185\u5B58\u6EA2\u51FA"></p><h3 id="_11-\u80FD\u624B\u5199\u5185\u5B58\u6EA2\u51FA\u7684\u4F8B\u5B50\u5417" tabindex="-1"><a class="header-anchor" href="#_11-\u80FD\u624B\u5199\u5185\u5B58\u6EA2\u51FA\u7684\u4F8B\u5B50\u5417" aria-hidden="true">#</a> 11.\u80FD\u624B\u5199\u5185\u5B58\u6EA2\u51FA\u7684\u4F8B\u5B50\u5417\uFF1F</h3><p>\u5728 JVM \u7684\u51E0\u4E2A\u5185\u5B58\u533A\u57DF\u4E2D\uFF0C\u9664\u4E86\u7A0B\u5E8F\u8BA1\u6570\u5668\u5916\uFF0C\u5176\u4ED6\u51E0\u4E2A\u8FD0\u884C\u65F6\u533A\u57DF\u90FD\u6709\u53D1\u751F\u5185\u5B58\u6EA2\u51FA\uFF08OOM\uFF09\u5F02\u5E38\u7684\u53EF\u80FD\uFF0C\u91CD\u70B9\u5173\u6CE8\u5806\u548C\u6808\u3002</p><ul><li>Java \u5806\u6EA2\u51FA</li></ul><p>Java \u5806\u7528\u4E8E\u50A8\u5B58\u5BF9\u8C61\u5B9E\u4F8B\uFF0C\u53EA\u8981\u4E0D\u65AD\u521B\u5EFA\u4E0D\u53EF\u88AB\u56DE\u6536\u7684\u5BF9\u8C61\uFF0C\u6BD4\u5982\u9759\u6001\u5BF9\u8C61\uFF0C\u90A3\u4E48\u968F\u7740\u5BF9\u8C61\u6570\u91CF\u7684\u589E\u52A0\uFF0C\u603B\u5BB9\u91CF\u89E6\u53CA\u6700\u5927\u5806\u7684\u5BB9\u91CF\u9650\u5236\u540E\u5C31\u4F1A\u4EA7\u751F\u5185\u5B58\u6EA2\u51FA\u5F02\u5E38\uFF08OutOfMemoryError\uFF09\u3002</p><p>\u8FD9\u5C31\u76F8\u5F53\u4E8E\u4E00\u4E2A\u623F\u5B50\u91CC\uFF0C\u4E0D\u65AD\u5806\u79EF\u4E0D\u80FD\u88AB\u6536\u8D70\u7684\u6742\u7269\uFF0C\u90A3\u4E48\u623F\u5B50\u5F88\u5FEB\u5C31\u4F1A\u88AB\u5806\u6EE1\u4E86\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token doc-comment comment">/**
+import{_ as t}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o,c as l,a as n,b as e,d as a,e as i}from"./app.615e41d8.js";const r={},c=n("h1",{id:"\u9762\u6E23\u9006\u88AD-java-\u865A\u62DF\u673A\u7BC7-\u5FC5\u770B",tabindex:"-1"},[n("a",{class:"header-anchor",href:"#\u9762\u6E23\u9006\u88AD-java-\u865A\u62DF\u673A\u7BC7-\u5FC5\u770B","aria-hidden":"true"},"#"),a(" \u9762\u6E23\u9006\u88AD\uFF08Java \u865A\u62DF\u673A\u7BC7\uFF09\u5FC5\u770B\u{1F44D}")],-1),d=a("\u56FE\u6587\u8BE6\u89E3 50 \u9053Java\u865A\u62DF\u673A\u9AD8\u9891\u9762\u8BD5\u9898\uFF0C\u8FD9\u6B21\u9762\u8BD5\uFF0C\u4E00\u5B9A\u540A\u6253\u9762\u8BD5\u5B98\uFF0C\u6574\u7406\uFF1A\u6C89\u9ED8\u738B\u4E8C\uFF0C\u6233"),u={href:"https://mp.weixin.qq.com/s/bHhqhl8mH3OAPt3EkaVc8Q",target:"_blank",rel:"noopener noreferrer"},v=a("\u8F6C\u8F7D\u94FE\u63A5"),m=a("\uFF0C\u4F5C\u8005\uFF1A\u4E09\u5206\u6076\uFF0C\u6233"),g={href:"https://mp.weixin.qq.com/s/XYsEJyIo46jXhHE1sOR_0Q",target:"_blank",rel:"noopener noreferrer"},b=a("\u539F\u6587\u94FE\u63A5"),h=a("\u3002"),k=i(`<h2 id="\u4E00\u3001\u5F15\u8A00" tabindex="-1"><a class="header-anchor" href="#\u4E00\u3001\u5F15\u8A00" aria-hidden="true">#</a> \u4E00\u3001\u5F15\u8A00</h2><h3 id="_1-\u4EC0\u4E48\u662F-jvm" tabindex="-1"><a class="header-anchor" href="#_1-\u4EC0\u4E48\u662F-jvm" aria-hidden="true">#</a> 1.\u4EC0\u4E48\u662F JVM?</h3><p>JVM\u2014\u2014Java \u865A\u62DF\u673A\uFF0C\u5B83\u662F Java \u5B9E\u73B0\u5E73\u53F0\u65E0\u5173\u6027\u7684\u57FA\u77F3\u3002</p><p>Java \u7A0B\u5E8F\u8FD0\u884C\u7684\u65F6\u5019\uFF0C\u7F16\u8BD1\u5668\u5C06 Java \u6587\u4EF6\u7F16\u8BD1\u6210\u5E73\u53F0\u65E0\u5173\u7684 Java \u5B57\u8282\u7801\u6587\u4EF6\uFF08.class\uFF09,\u63A5\u4E0B\u6765\u5BF9\u5E94\u5E73\u53F0 JVM \u5BF9\u5B57\u8282\u7801\u6587\u4EF6\u8FDB\u884C\u89E3\u91CA\uFF0C\u7FFB\u8BD1\u6210\u5BF9\u5E94\u5E73\u53F0\u5339\u914D\u7684\u673A\u5668\u6307\u4EE4\u5E76\u8FD0\u884C\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/jvm-1.png" alt="Java\u8BED\u8A00\u7F16\u8BD1\u8FD0\u884C"></p><p>\u540C\u65F6 JVM \u4E5F\u662F\u4E00\u4E2A\u8DE8\u8BED\u8A00\u7684\u5E73\u53F0\uFF0C\u548C\u8BED\u8A00\u65E0\u5173\uFF0C\u53EA\u548C class \u7684\u6587\u4EF6\u683C\u5F0F\u5173\u8054\uFF0C\u4EFB\u4F55\u8BED\u8A00\uFF0C\u53EA\u8981\u80FD\u7FFB\u8BD1\u6210\u7B26\u5408\u89C4\u8303\u7684\u5B57\u8282\u7801\u6587\u4EF6\uFF0C\u90FD\u80FD\u88AB JVM \u8FD0\u884C\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/jvm-2.png" alt="JVM\u8DE8\u8BED\u8A00"></p><h2 id="\u4E8C\u3001\u5185\u5B58\u7BA1\u7406" tabindex="-1"><a class="header-anchor" href="#\u4E8C\u3001\u5185\u5B58\u7BA1\u7406" aria-hidden="true">#</a> \u4E8C\u3001\u5185\u5B58\u7BA1\u7406</h2><h3 id="_2-\u80FD\u8BF4\u4E00\u4E0B-jvm-\u7684\u5185\u5B58\u533A\u57DF\u5417" tabindex="-1"><a class="header-anchor" href="#_2-\u80FD\u8BF4\u4E00\u4E0B-jvm-\u7684\u5185\u5B58\u533A\u57DF\u5417" aria-hidden="true">#</a> 2.\u80FD\u8BF4\u4E00\u4E0B JVM \u7684\u5185\u5B58\u533A\u57DF\u5417\uFF1F</h3><p>JVM \u5185\u5B58\u533A\u57DF\u6700\u7C97\u7565\u7684\u5212\u5206\u53EF\u4EE5\u5206\u4E3A<code>\u5806</code>\u548C<code>\u6808</code>\uFF0C\u5F53\u7136\uFF0C\u6309\u7167\u865A\u62DF\u673A\u89C4\u8303\uFF0C\u53EF\u4EE5\u5212\u5206\u4E3A\u4EE5\u4E0B\u51E0\u4E2A\u533A\u57DF\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/jvm-3.png" alt="Java\u865A\u62DF\u673A\u8FD0\u884C\u65F6\u6570\u636E\u533A"></p><p>JVM \u5185\u5B58\u5206\u4E3A\u7EBF\u7A0B\u79C1\u6709\u533A\u548C\u7EBF\u7A0B\u5171\u4EAB\u533A\uFF0C\u5176\u4E2D<code>\u65B9\u6CD5\u533A</code>\u548C<code>\u5806</code>\u662F\u7EBF\u7A0B\u5171\u4EAB\u533A\uFF0C<code>\u865A\u62DF\u673A\u6808</code>\u3001<code>\u672C\u5730\u65B9\u6CD5\u6808</code>\u548C<code>\u7A0B\u5E8F\u8BA1\u6570\u5668</code>\u662F\u7EBF\u7A0B\u9694\u79BB\u7684\u6570\u636E\u533A\u3002</p><p><strong>1\uFF09\u7A0B\u5E8F\u8BA1\u6570\u5668</strong></p><p>\u7A0B\u5E8F\u8BA1\u6570\u5668\uFF08Program Counter Register\uFF09\u4E5F\u88AB\u79F0\u4E3A PC \u5BC4\u5B58\u5668\uFF0C\u662F\u4E00\u5757\u8F83\u5C0F\u7684\u5185\u5B58\u7A7A\u95F4\u3002</p><p>\u5B83\u53EF\u4EE5\u770B\u4F5C\u662F\u5F53\u524D\u7EBF\u7A0B\u6240\u6267\u884C\u7684\u5B57\u8282\u7801\u7684\u884C\u53F7\u6307\u793A\u5668\u3002</p><p><strong>2\uFF09Java \u865A\u62DF\u673A\u6808</strong></p><p>Java \u865A\u62DF\u673A\u6808\uFF08Java Virtual Machine Stack\uFF09\u4E5F\u662F\u7EBF\u7A0B\u79C1\u6709\u7684\uFF0C\u5B83\u7684\u751F\u547D\u5468\u671F\u4E0E\u7EBF\u7A0B\u76F8\u540C\u3002</p><p>Java \u865A\u62DF\u673A\u6808\u63CF\u8FF0\u7684\u662F Java \u65B9\u6CD5\u6267\u884C\u7684\u7EBF\u7A0B\u5185\u5B58\u6A21\u578B\uFF1A\u65B9\u6CD5\u6267\u884C\u65F6\uFF0CJVM \u4F1A\u540C\u6B65\u521B\u5EFA\u4E00\u4E2A\u6808\u5E27\uFF0C\u7528\u6765\u5B58\u50A8\u5C40\u90E8\u53D8\u91CF\u8868\u3001\u64CD\u4F5C\u6570\u6808\u3001\u52A8\u6001\u8FDE\u63A5\u7B49\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/jvm-4.png" alt="Java\u865A\u62DF\u673A\u6808"></p><p><strong>3\uFF09\u672C\u5730\u65B9\u6CD5\u6808</strong></p><p>\u672C\u5730\u65B9\u6CD5\u6808\uFF08Native Method Stacks\uFF09\u4E0E\u865A\u62DF\u673A\u6808\u6240\u53D1\u6325\u7684\u4F5C\u7528\u662F\u975E\u5E38\u76F8\u4F3C\u7684\uFF0C\u5176\u533A\u522B\u53EA\u662F\u865A\u62DF\u673A\u6808\u4E3A\u865A\u62DF\u673A\u6267\u884C Java \u65B9\u6CD5\uFF08\u4E5F\u5C31\u662F\u5B57\u8282\u7801\uFF09\u670D\u52A1\uFF0C\u800C\u672C\u5730\u65B9\u6CD5\u6808\u5219\u662F\u4E3A\u865A\u62DF\u673A\u4F7F\u7528\u5230\u7684\u672C\u5730\uFF08Native\uFF09\u65B9\u6CD5\u670D\u52A1\u3002</p><p>Java \u865A\u62DF\u673A\u89C4\u8303\u5141\u8BB8\u672C\u5730\u65B9\u6CD5\u6808\u88AB\u5B9E\u73B0\u6210\u56FA\u5B9A\u5927\u5C0F\u7684\u6216\u8005\u662F\u6839\u636E\u8BA1\u7B97\u52A8\u6001\u6269\u5C55\u548C\u6536\u7F29\u7684\u3002</p><p><strong>4\uFF09Java \u5806</strong></p><p>\u5BF9\u4E8E Java \u5E94\u7528\u7A0B\u5E8F\u6765\u8BF4\uFF0CJava \u5806\uFF08Java Heap\uFF09\u662F\u865A\u62DF\u673A\u6240\u7BA1\u7406\u7684\u5185\u5B58\u4E2D\u6700\u5927\u7684\u4E00\u5757\u3002Java \u5806\u662F\u88AB\u6240\u6709\u7EBF\u7A0B\u5171\u4EAB\u7684\u4E00\u5757\u5185\u5B58\u533A\u57DF\uFF0C\u5728\u865A\u62DF\u673A\u542F\u52A8\u65F6\u521B\u5EFA\u3002\u6B64\u5185\u5B58\u533A\u57DF\u7684\u552F\u4E00\u76EE\u7684\u5C31\u662F\u5B58\u653E\u5BF9\u8C61\u5B9E\u4F8B\uFF0CJava \u91CC\u201C<strong>\u51E0\u4E4E</strong>\u201D\u6240\u6709\u7684\u5BF9\u8C61\u5B9E\u4F8B\u90FD\u5728\u8FD9\u91CC\u5206\u914D\u5185\u5B58\u3002</p><p>Java \u5806\u662F\u5783\u573E\u6536\u96C6\u5668\u7BA1\u7406\u7684\u5185\u5B58\u533A\u57DF\uFF0C\u56E0\u6B64\u4E00\u4E9B\u8D44\u6599\u4E2D\u5B83\u4E5F\u88AB\u79F0\u4F5C\u201CGC \u5806\u201D\uFF08Garbage Collected Heap\uFF0C\uFF09\u3002\u4ECE\u56DE\u6536\u5185\u5B58\u7684\u89D2\u5EA6\u770B\uFF0C\u7531\u4E8E\u73B0\u4EE3\u5783\u573E\u6536\u96C6\u5668\u5927\u90E8\u5206\u90FD\u662F\u57FA\u4E8E\u5206\u4EE3\u6536\u96C6\u7406\u8BBA\u8BBE\u8BA1\u7684\uFF0C\u6240\u4EE5 Java \u5806\u4E2D\u7ECF\u5E38\u4F1A\u51FA\u73B0<code>\u65B0\u751F\u4EE3</code>\u3001<code>\u8001\u5E74\u4EE3</code>\u3001<code>Eden\u7A7A\u95F4</code>\u3001<code>From Survivor\u7A7A\u95F4</code>\u3001<code>To Survivor\u7A7A\u95F4</code>\u7B49\u540D\u8BCD\uFF0C\u9700\u8981\u6CE8\u610F\u7684\u662F\u8FD9\u79CD\u5212\u5206\u53EA\u662F\u6839\u636E\u5783\u573E\u56DE\u6536\u673A\u5236\u6765\u8FDB\u884C\u7684\u5212\u5206\uFF0C\u4E0D\u662F Java \u865A\u62DF\u673A\u89C4\u8303\u672C\u8EAB\u5236\u5B9A\u7684\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/jvm-5.png" alt="Java \u5806\u5185\u5B58\u7ED3\u6784"></p><p><strong>5\uFF09\u65B9\u6CD5\u533A</strong></p><p>\u65B9\u6CD5\u533A\u662F\u6BD4\u8F83\u7279\u522B\u7684\u4E00\u5757\u533A\u57DF\uFF0C\u548C\u5806\u7C7B\u4F3C\uFF0C\u5B83\u4E5F\u662F\u5404\u4E2A\u7EBF\u7A0B\u5171\u4EAB\u7684\u5185\u5B58\u533A\u57DF\uFF0C\u7528\u4E8E\u5B58\u50A8\u5DF2\u88AB\u865A\u62DF\u673A\u52A0\u8F7D\u7684\u7C7B\u578B\u4FE1\u606F\u3001\u5E38\u91CF\u3001\u9759\u6001\u53D8\u91CF\u3001\u5373\u65F6\u7F16\u8BD1\u5668\u7F16\u8BD1\u540E\u7684\u4EE3\u7801\u7F13\u5B58\u7B49\u6570\u636E\u3002</p><p>\u5B83\u7279\u522B\u5728 Java \u865A\u62DF\u673A\u89C4\u8303\u5BF9\u5B83\u7684\u7EA6\u675F\u975E\u5E38\u5BBD\u677E\uFF0C\u6240\u4EE5\u65B9\u6CD5\u533A\u7684\u5177\u4F53\u5B9E\u73B0\u5386\u7ECF\u4E86\u8BB8\u591A\u53D8\u8FC1\uFF0C\u4F8B\u5982 jdk1.7 \u4E4B\u524D\u4F7F\u7528\u6C38\u4E45\u4EE3\u4F5C\u4E3A\u65B9\u6CD5\u533A\u7684\u5B9E\u73B0\u3002</p><h3 id="_3-\u8BF4\u4E00\u4E0B-jdk1-6\u30011-7\u30011-8-\u5185\u5B58\u533A\u57DF\u7684\u53D8\u5316" tabindex="-1"><a class="header-anchor" href="#_3-\u8BF4\u4E00\u4E0B-jdk1-6\u30011-7\u30011-8-\u5185\u5B58\u533A\u57DF\u7684\u53D8\u5316" aria-hidden="true">#</a> 3.\u8BF4\u4E00\u4E0B JDK1.6\u30011.7\u30011.8 \u5185\u5B58\u533A\u57DF\u7684\u53D8\u5316\uFF1F</h3><p>JDK1.6\u30011.7/1.8 \u5185\u5B58\u533A\u57DF\u53D1\u751F\u4E86\u53D8\u5316\uFF0C\u4E3B\u8981\u4F53\u73B0\u5728\u65B9\u6CD5\u533A\u7684\u5B9E\u73B0\uFF1A</p><ul><li>JDK1.6 \u4F7F\u7528\u6C38\u4E45\u4EE3\u5B9E\u73B0\u65B9\u6CD5\u533A\uFF1A</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/jvm-6.png" alt="JDK 1.6\u5185\u5B58\u533A\u57DF"></p><ul><li>JDK1.7 \u65F6\u53D1\u751F\u4E86\u4E00\u4E9B\u53D8\u5316\uFF0C\u5C06\u5B57\u7B26\u4E32\u5E38\u91CF\u6C60\u3001\u9759\u6001\u53D8\u91CF\uFF0C\u5B58\u653E\u5728\u5806\u4E0A</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/jvm-7.png" alt="JDK 1.7\u5185\u5B58\u533A\u57DF"></p><ul><li>\u5728 JDK1.8 \u65F6\u5F7B\u5E95\u5E72\u6389\u4E86\u6C38\u4E45\u4EE3\uFF0C\u800C\u5728\u76F4\u63A5\u5185\u5B58\u4E2D\u5212\u51FA\u4E00\u5757\u533A\u57DF\u4F5C\u4E3A<strong>\u5143\u7A7A\u95F4</strong>\uFF0C\u8FD0\u884C\u65F6\u5E38\u91CF\u6C60\u3001\u7C7B\u5E38\u91CF\u6C60\u90FD\u79FB\u52A8\u5230\u5143\u7A7A\u95F4\u3002</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/jvm-8.png" alt="JDK 1.8\u5185\u5B58\u533A\u57DF"></p><h3 id="_4-\u4E3A\u4EC0\u4E48\u4F7F\u7528\u5143\u7A7A\u95F4\u66FF\u4EE3\u6C38\u4E45\u4EE3\u4F5C\u4E3A\u65B9\u6CD5\u533A\u7684\u5B9E\u73B0" tabindex="-1"><a class="header-anchor" href="#_4-\u4E3A\u4EC0\u4E48\u4F7F\u7528\u5143\u7A7A\u95F4\u66FF\u4EE3\u6C38\u4E45\u4EE3\u4F5C\u4E3A\u65B9\u6CD5\u533A\u7684\u5B9E\u73B0" aria-hidden="true">#</a> 4.\u4E3A\u4EC0\u4E48\u4F7F\u7528\u5143\u7A7A\u95F4\u66FF\u4EE3\u6C38\u4E45\u4EE3\u4F5C\u4E3A\u65B9\u6CD5\u533A\u7684\u5B9E\u73B0\uFF1F</h3><p>Java \u865A\u62DF\u673A\u89C4\u8303\u89C4\u5B9A\u7684\u65B9\u6CD5\u533A\u53EA\u662F\u6362\u79CD\u65B9\u5F0F\u5B9E\u73B0\u3002\u6709\u5BA2\u89C2\u548C\u4E3B\u89C2\u4E24\u4E2A\u539F\u56E0\u3002</p><ul><li><p>\u5BA2\u89C2\u4E0A\u4F7F\u7528\u6C38\u4E45\u4EE3\u6765\u5B9E\u73B0\u65B9\u6CD5\u533A\u7684\u51B3\u5B9A\u7684\u8BBE\u8BA1\u5BFC\u81F4\u4E86 Java \u5E94\u7528\u66F4\u5BB9\u6613\u9047\u5230\u5185\u5B58\u6EA2\u51FA\u7684\u95EE\u9898\uFF08\u6C38\u4E45\u4EE3\u6709-XX\uFF1AMaxPermSize \u7684\u4E0A\u9650\uFF0C\u5373\u4F7F\u4E0D\u8BBE\u7F6E\u4E5F\u6709\u9ED8\u8BA4\u5927\u5C0F\uFF0C\u800C J9 \u548C JRockit \u53EA\u8981\u6CA1\u6709\u89E6\u78B0\u5230\u8FDB\u7A0B\u53EF\u7528\u5185\u5B58\u7684\u4E0A\u9650\uFF0C\u4F8B\u5982 32 \u4F4D\u7CFB\u7EDF\u4E2D\u7684 4GB \u9650\u5236\uFF0C\u5C31\u4E0D\u4F1A\u51FA\u95EE\u9898\uFF09\uFF0C\u800C\u4E14\u6709\u6781\u5C11\u6570\u65B9\u6CD5 \uFF08\u4F8B\u5982 String::intern()\uFF09\u4F1A\u56E0\u6C38\u4E45\u4EE3\u7684\u539F\u56E0\u800C\u5BFC\u81F4\u4E0D\u540C\u865A\u62DF\u673A\u4E0B\u6709\u4E0D\u540C\u7684\u8868\u73B0\u3002</p></li><li><p>\u4E3B\u89C2\u4E0A\u5F53 Oracle \u6536\u8D2D BEA \u83B7\u5F97\u4E86 JRockit \u7684\u6240\u6709\u6743\u540E\uFF0C\u51C6\u5907\u628A JRockit \u4E2D\u7684\u4F18\u79C0\u529F\u80FD\uFF0C\u8B6C\u5982 Java Mission Control \u7BA1\u7406\u5DE5\u5177\uFF0C\u79FB\u690D\u5230 HotSpot \u865A\u62DF\u673A\u65F6\uFF0C\u4F46\u56E0\u4E3A\u4E24\u8005\u5BF9\u65B9\u6CD5\u533A\u5B9E\u73B0\u7684\u5DEE\u5F02\u800C\u9762\u4E34\u8BF8\u591A\u56F0\u96BE\u3002\u8003\u8651\u5230 HotSpot \u672A\u6765\u7684\u53D1\u5C55\uFF0C\u5728 JDK 6 \u7684 \u65F6\u5019 HotSpot \u5F00\u53D1\u56E2\u961F\u5C31\u6709\u653E\u5F03\u6C38\u4E45\u4EE3\uFF0C\u9010\u6B65\u6539\u4E3A\u91C7\u7528\u672C\u5730\u5185\u5B58\uFF08Native Memory\uFF09\u6765\u5B9E\u73B0\u65B9\u6CD5\u533A\u7684\u8BA1\u5212\u4E86\uFF0C\u5230\u4E86 JDK 7 \u7684 HotSpot\uFF0C\u5DF2\u7ECF\u628A\u539F\u672C\u653E\u5728\u6C38\u4E45\u4EE3\u7684\u5B57\u7B26\u4E32\u5E38\u91CF\u6C60\u3001\u9759\u6001\u53D8\u91CF\u7B49\u79FB\u51FA\uFF0C\u800C\u5230\u4E86 JDK 8\uFF0C\u7EC8\u4E8E\u5B8C\u5168\u5E9F\u5F03\u4E86\u6C38\u4E45\u4EE3\u7684\u6982\u5FF5\uFF0C\u6539\u7528\u4E0E JRockit\u3001J9 \u4E00\u6837\u5728\u672C\u5730\u5185\u5B58\u4E2D\u5B9E\u73B0\u7684\u5143\u7A7A\u95F4\uFF08Meta-space\uFF09\u6765\u4EE3\u66FF\uFF0C\u628A JDK 7 \u4E2D\u6C38\u4E45\u4EE3\u8FD8\u5269\u4F59\u7684\u5185\u5BB9\uFF08\u4E3B\u8981\u662F\u7C7B\u578B\u4FE1\u606F\uFF09\u5168\u90E8\u79FB\u5230\u5143\u7A7A\u95F4\u4E2D\u3002</p></li></ul><h3 id="_5-\u5BF9\u8C61\u521B\u5EFA\u7684\u8FC7\u7A0B\u4E86\u89E3\u5417" tabindex="-1"><a class="header-anchor" href="#_5-\u5BF9\u8C61\u521B\u5EFA\u7684\u8FC7\u7A0B\u4E86\u89E3\u5417" aria-hidden="true">#</a> 5.\u5BF9\u8C61\u521B\u5EFA\u7684\u8FC7\u7A0B\u4E86\u89E3\u5417\uFF1F</h3><p>\u5728 JVM \u4E2D\u5BF9\u8C61\u7684\u521B\u5EFA\uFF0C\u6211\u4EEC\u4ECE\u4E00\u4E2A new \u6307\u4EE4\u5F00\u59CB\uFF1A</p><ul><li><p>\u9996\u5148\u68C0\u67E5\u8FD9\u4E2A\u6307\u4EE4\u7684\u53C2\u6570\u662F\u5426\u80FD\u5728\u5E38\u91CF\u6C60\u4E2D\u5B9A\u4F4D\u5230\u4E00\u4E2A\u7C7B\u7684\u7B26\u53F7\u5F15\u7528</p></li><li><p>\u68C0\u67E5\u8FD9\u4E2A\u7B26\u53F7\u5F15\u7528\u4EE3\u8868\u7684\u7C7B\u662F\u5426\u5DF2\u88AB\u52A0\u8F7D\u3001\u89E3\u6790\u548C\u521D\u59CB\u5316\u8FC7\u3002\u5982\u679C\u6CA1\u6709\uFF0C\u5C31\u5148\u6267\u884C\u76F8\u5E94\u7684\u7C7B\u52A0\u8F7D\u8FC7\u7A0B</p></li><li><p>\u7C7B\u52A0\u8F7D\u68C0\u67E5\u901A\u8FC7\u540E\uFF0C\u63A5\u4E0B\u6765\u865A\u62DF\u673A\u5C06\u4E3A\u65B0\u751F\u5BF9\u8C61\u5206\u914D\u5185\u5B58\u3002</p></li><li><p>\u5185\u5B58\u5206\u914D\u5B8C\u6210\u4E4B\u540E\uFF0C\u865A\u62DF\u673A\u5C06\u5206\u914D\u5230\u7684\u5185\u5B58\u7A7A\u95F4\uFF08\u4F46\u4E0D\u5305\u62EC\u5BF9\u8C61\u5934\uFF09\u90FD\u521D\u59CB\u5316\u4E3A\u96F6\u503C\u3002</p></li><li><p>\u63A5\u4E0B\u6765\u8BBE\u7F6E\u5BF9\u8C61\u5934\uFF0C\u8BF7\u6C42\u5934\u91CC\u5305\u542B\u4E86\u5BF9\u8C61\u662F\u54EA\u4E2A\u7C7B\u7684\u5B9E\u4F8B\u3001\u5982\u4F55\u624D\u80FD\u627E\u5230\u7C7B\u7684\u5143\u6570\u636E\u4FE1\u606F\u3001\u5BF9\u8C61\u7684\u54C8\u5E0C\u7801\u3001\u5BF9\u8C61\u7684 GC \u5206\u4EE3\u5E74\u9F84\u7B49\u4FE1\u606F\u3002</p></li></ul><p>\u8FD9\u4E2A\u8FC7\u7A0B\u5927\u6982\u56FE\u793A\u5982\u4E0B\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/jvm-9.png" alt="\u5BF9\u8C61\u521B\u5EFA\u8FC7\u7A0B"></p><h3 id="_6-\u4EC0\u4E48\u662F\u6307\u9488\u78B0\u649E-\u4EC0\u4E48\u662F\u7A7A\u95F2\u5217\u8868" tabindex="-1"><a class="header-anchor" href="#_6-\u4EC0\u4E48\u662F\u6307\u9488\u78B0\u649E-\u4EC0\u4E48\u662F\u7A7A\u95F2\u5217\u8868" aria-hidden="true">#</a> 6.\u4EC0\u4E48\u662F\u6307\u9488\u78B0\u649E\uFF1F\u4EC0\u4E48\u662F\u7A7A\u95F2\u5217\u8868\uFF1F</h3><p>\u5185\u5B58\u5206\u914D\u6709\u4E24\u79CD\u65B9\u5F0F\uFF0C<strong>\u6307\u9488\u78B0\u649E</strong>\uFF08Bump The Pointer\uFF09\u3001<strong>\u7A7A\u95F2\u5217\u8868</strong>\uFF08Free List\uFF09\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/jvm-10.png" alt="\u6307\u9488\u78B0\u649E\u548C\u7A7A\u95F2\u5217\u8868"></p><ul><li>\u6307\u9488\u78B0\u649E\uFF1A\u5047\u8BBE Java \u5806\u4E2D\u5185\u5B58\u662F\u7EDD\u5BF9\u89C4\u6574\u7684\uFF0C\u6240\u6709\u88AB\u4F7F\u7528\u8FC7\u7684\u5185\u5B58\u90FD\u88AB\u653E\u5728\u4E00\u8FB9\uFF0C\u7A7A\u95F2\u7684\u5185\u5B58\u88AB\u653E\u5728\u53E6\u4E00\u8FB9\uFF0C\u4E2D\u95F4\u653E\u7740\u4E00\u4E2A\u6307\u9488\u4F5C\u4E3A\u5206\u754C\u70B9\u7684\u6307\u793A\u5668\uFF0C\u90A3\u6240\u5206\u914D\u5185\u5B58\u5C31\u4EC5\u4EC5\u662F\u628A\u90A3\u4E2A\u6307\u9488\u5411\u7A7A\u95F2\u7A7A\u95F4\u65B9\u5411\u632A\u52A8\u4E00\u6BB5\u4E0E\u5BF9\u8C61\u5927\u5C0F\u76F8\u7B49\u7684\u8DDD\u79BB\uFF0C\u8FD9\u79CD\u5206\u914D\u65B9\u5F0F\u79F0\u4E3A\u201C\u6307\u9488\u78B0\u649E\u201D\u3002</li><li>\u7A7A\u95F2\u5217\u8868\uFF1A\u5982\u679C Java \u5806\u4E2D\u7684\u5185\u5B58\u5E76\u4E0D\u662F\u89C4\u6574\u7684\uFF0C\u5DF2\u88AB\u4F7F\u7528\u7684\u5185\u5B58\u548C\u7A7A\u95F2\u7684\u5185\u5B58\u76F8\u4E92\u4EA4\u9519\u5728\u4E00\u8D77\uFF0C\u90A3\u5C31\u6CA1\u6709\u529E\u6CD5\u7B80\u5355\u5730\u8FDB\u884C\u6307\u9488\u78B0\u649E\u4E86\uFF0C\u865A\u62DF\u673A\u5C31\u5FC5\u987B\u7EF4\u62A4\u4E00\u4E2A\u5217\u8868\uFF0C\u8BB0\u5F55\u4E0A\u54EA\u4E9B\u5185\u5B58\u5757\u662F\u53EF\u7528\u7684\uFF0C\u5728\u5206\u914D\u7684\u65F6\u5019\u4ECE\u5217\u8868\u4E2D\u627E\u5230\u4E00\u5757\u8DB3\u591F\u5927\u7684\u7A7A\u95F4\u5212\u5206\u7ED9\u5BF9\u8C61\u5B9E\u4F8B\uFF0C\u5E76\u66F4\u65B0\u5217\u8868\u4E0A\u7684\u8BB0\u5F55\uFF0C\u8FD9\u79CD\u5206\u914D\u65B9\u5F0F\u79F0\u4E3A\u201C\u7A7A\u95F2\u5217\u8868\u201D\u3002</li><li>\u4E24\u79CD\u65B9\u5F0F\u7684\u9009\u62E9\u7531 Java \u5806\u662F\u5426\u89C4\u6574\u51B3\u5B9A\uFF0CJava \u5806\u662F\u5426\u89C4\u6574\u662F\u7531\u9009\u62E9\u7684\u5783\u573E\u6536\u96C6\u5668\u662F\u5426\u5177\u6709\u538B\u7F29\u6574\u7406\u80FD\u529B\u51B3\u5B9A\u7684\u3002</li></ul><h3 id="_7-jvm-\u91CC-new-\u5BF9\u8C61\u65F6-\u5806\u4F1A\u53D1\u751F\u62A2\u5360\u5417-jvm-\u662F\u600E\u4E48\u8BBE\u8BA1\u6765\u4FDD\u8BC1\u7EBF\u7A0B\u5B89\u5168\u7684" tabindex="-1"><a class="header-anchor" href="#_7-jvm-\u91CC-new-\u5BF9\u8C61\u65F6-\u5806\u4F1A\u53D1\u751F\u62A2\u5360\u5417-jvm-\u662F\u600E\u4E48\u8BBE\u8BA1\u6765\u4FDD\u8BC1\u7EBF\u7A0B\u5B89\u5168\u7684" aria-hidden="true">#</a> 7.JVM \u91CC new \u5BF9\u8C61\u65F6\uFF0C\u5806\u4F1A\u53D1\u751F\u62A2\u5360\u5417\uFF1FJVM \u662F\u600E\u4E48\u8BBE\u8BA1\u6765\u4FDD\u8BC1\u7EBF\u7A0B\u5B89\u5168\u7684\uFF1F</h3><p>\u4F1A\uFF0C\u5047\u8BBE JVM \u865A\u62DF\u673A\u4E0A\uFF0C\u6BCF\u4E00\u6B21 new \u5BF9\u8C61\u65F6\uFF0C\u6307\u9488\u5C31\u4F1A\u5411\u53F3\u79FB\u52A8\u4E00\u4E2A\u5BF9\u8C61 size \u7684\u8DDD\u79BB\uFF0C\u4E00\u4E2A\u7EBF\u7A0B\u6B63\u5728\u7ED9 A \u5BF9\u8C61\u5206\u914D\u5185\u5B58\uFF0C\u6307\u9488\u8FD8\u6CA1\u6709\u6765\u7684\u53CA\u4FEE\u6539\uFF0C\u53E6\u4E00\u4E2A\u4E3A B \u5BF9\u8C61\u5206\u914D\u5185\u5B58\u7684\u7EBF\u7A0B\uFF0C\u53C8\u5F15\u7528\u4E86\u8FD9\u4E2A\u6307\u9488\u6765\u5206\u914D\u5185\u5B58\uFF0C\u8FD9\u5C31\u53D1\u751F\u4E86\u62A2\u5360\u3002</p><p>\u6709\u4E24\u79CD\u53EF\u9009\u65B9\u6848\u6765\u89E3\u51B3\u8FD9\u4E2A\u95EE\u9898\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/jvm-11.png" alt="\u5806\u62A2\u5360\u548C\u89E3\u51B3\u65B9\u6848"></p><ul><li><p>\u91C7\u7528 CAS \u5206\u914D\u91CD\u8BD5\u7684\u65B9\u5F0F\u6765\u4FDD\u8BC1\u66F4\u65B0\u64CD\u4F5C\u7684\u539F\u5B50\u6027</p></li><li><p>\u6BCF\u4E2A\u7EBF\u7A0B\u5728 Java \u5806\u4E2D\u9884\u5148\u5206\u914D\u4E00\u5C0F\u5757\u5185\u5B58\uFF0C\u4E5F\u5C31\u662F\u672C\u5730\u7EBF\u7A0B\u5206\u914D\u7F13\u51B2\uFF08Thread Local Allocation</p><p>Buffer\uFF0CTLAB\uFF09\uFF0C\u8981\u5206\u914D\u5185\u5B58\u7684\u7EBF\u7A0B\uFF0C\u5148\u5728\u672C\u5730\u7F13\u51B2\u533A\u4E2D\u5206\u914D\uFF0C\u53EA\u6709\u672C\u5730\u7F13\u51B2\u533A\u7528\u5B8C\u4E86\uFF0C\u5206\u914D\u65B0\u7684\u7F13\u5B58\u533A\u65F6\u624D\u9700\u8981\u540C\u6B65\u9501\u5B9A\u3002</p></li></ul><h3 id="_8-\u80FD\u8BF4\u4E00\u4E0B\u5BF9\u8C61\u7684\u5185\u5B58\u5E03\u5C40\u5417" tabindex="-1"><a class="header-anchor" href="#_8-\u80FD\u8BF4\u4E00\u4E0B\u5BF9\u8C61\u7684\u5185\u5B58\u5E03\u5C40\u5417" aria-hidden="true">#</a> 8.\u80FD\u8BF4\u4E00\u4E0B\u5BF9\u8C61\u7684\u5185\u5B58\u5E03\u5C40\u5417\uFF1F</h3><p>\u5728 HotSpot \u865A\u62DF\u673A\u91CC\uFF0C\u5BF9\u8C61\u5728\u5806\u5185\u5B58\u4E2D\u7684\u5B58\u50A8\u5E03\u5C40\u53EF\u4EE5\u5212\u5206\u4E3A\u4E09\u4E2A\u90E8\u5206\uFF1A\u5BF9\u8C61\u5934\uFF08Header\uFF09\u3001\u5B9E\u4F8B\u6570\u636E\uFF08Instance Data\uFF09\u548C\u5BF9\u9F50\u586B\u5145\uFF08Padding\uFF09\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/jvm-12.png" alt="\u5BF9\u8C61\u7684\u5B58\u50A8\u5E03\u5C40"></p><p><strong>\u5BF9\u8C61\u5934</strong>\u4E3B\u8981\u7531\u4E24\u90E8\u5206\u7EC4\u6210\uFF1A</p><ul><li>\u7B2C\u4E00\u90E8\u5206\u5B58\u50A8\u5BF9\u8C61\u81EA\u8EAB\u7684\u8FD0\u884C\u65F6\u6570\u636E\uFF1A\u54C8\u5E0C\u7801\u3001GC \u5206\u4EE3\u5E74\u9F84\u3001\u9501\u72B6\u6001\u6807\u5FD7\u3001\u7EBF\u7A0B\u6301\u6709\u7684\u9501\u3001\u504F\u5411\u7EBF\u7A0B ID\u3001\u504F\u5411\u65F6\u95F4\u6233\u7B49\uFF0C\u5B98\u65B9\u79F0\u5B83\u4E3A Mark Word\uFF0C\u5B83\u662F\u4E2A\u52A8\u6001\u7684\u7ED3\u6784\uFF0C\u968F\u7740\u5BF9\u8C61\u72B6\u6001\u53D8\u5316\u3002</li><li>\u7B2C\u4E8C\u90E8\u5206\u662F\u7C7B\u578B\u6307\u9488\uFF0C\u6307\u5411\u5BF9\u8C61\u7684\u7C7B\u5143\u6570\u636E\u7C7B\u578B\uFF08\u5373\u5BF9\u8C61\u4EE3\u8868\u54EA\u4E2A\u7C7B\uFF09\u3002</li><li>\u6B64\u5916\uFF0C\u5982\u679C\u5BF9\u8C61\u662F\u4E00\u4E2A Java \u6570\u7EC4\uFF0C\u90A3\u8FD8\u5E94\u8BE5\u6709\u4E00\u5757\u7528\u4E8E\u8BB0\u5F55\u6570\u7EC4\u957F\u5EA6\u7684\u6570\u636E</li></ul><p><strong>\u5B9E\u4F8B\u6570\u636E</strong>\u7528\u6765\u5B58\u50A8\u5BF9\u8C61\u771F\u6B63\u7684\u6709\u6548\u4FE1\u606F\uFF0C\u4E5F\u5C31\u662F\u6211\u4EEC\u5728\u7A0B\u5E8F\u4EE3\u7801\u91CC\u6240\u5B9A\u4E49\u7684\u5404\u79CD\u7C7B\u578B\u7684\u5B57\u6BB5\u5185\u5BB9\uFF0C\u65E0\u8BBA\u662F\u4ECE\u7236\u7C7B\u7EE7\u627F\u7684\uFF0C\u8FD8\u662F\u81EA\u5DF1\u5B9A\u4E49\u7684\u3002</p><p><strong>\u5BF9\u9F50\u586B\u5145</strong>\u4E0D\u662F\u5FC5\u987B\u7684\uFF0C\u6CA1\u6709\u7279\u522B\u542B\u4E49\uFF0C\u4EC5\u4EC5\u8D77\u7740\u5360\u4F4D\u7B26\u7684\u4F5C\u7528\u3002</p><h3 id="_9-\u5BF9\u8C61\u600E\u4E48\u8BBF\u95EE\u5B9A\u4F4D" tabindex="-1"><a class="header-anchor" href="#_9-\u5BF9\u8C61\u600E\u4E48\u8BBF\u95EE\u5B9A\u4F4D" aria-hidden="true">#</a> 9.\u5BF9\u8C61\u600E\u4E48\u8BBF\u95EE\u5B9A\u4F4D\uFF1F</h3><p>Java \u7A0B\u5E8F\u4F1A\u901A\u8FC7\u6808\u4E0A\u7684 reference \u6570\u636E\u6765\u64CD\u4F5C\u5806\u4E0A\u7684\u5177\u4F53\u5BF9\u8C61\u3002\u7531\u4E8E reference \u7C7B\u578B\u5728\u300AJava \u865A\u62DF\u673A\u89C4\u8303\u300B\u91CC\u9762\u53EA\u89C4\u5B9A\u4E86\u5B83\u662F\u4E00\u4E2A\u6307\u5411\u5BF9\u8C61\u7684\u5F15\u7528\uFF0C\u5E76\u6CA1\u6709\u5B9A\u4E49\u8FD9\u4E2A\u5F15\u7528\u5E94\u8BE5\u901A\u8FC7\u4EC0\u4E48\u65B9\u5F0F\u53BB\u5B9A\u4F4D\u3001\u8BBF\u95EE\u5230\u5806\u4E2D\u5BF9\u8C61\u7684\u5177\u4F53\u4F4D\u7F6E\uFF0C\u6240\u4EE5\u5BF9\u8C61\u8BBF\u95EE\u65B9\u5F0F\u4E5F\u662F\u7531\u865A\u62DF\u673A\u5B9E\u73B0\u800C\u5B9A\u7684\uFF0C\u4E3B\u6D41\u7684\u8BBF\u95EE\u65B9\u5F0F\u4E3B\u8981\u6709\u4F7F\u7528\u53E5\u67C4\u548C\u76F4\u63A5\u6307\u9488\u4E24\u79CD\uFF1A</p><ul><li>\u5982\u679C\u4F7F\u7528\u53E5\u67C4\u8BBF\u95EE\u7684\u8BDD\uFF0CJava \u5806\u4E2D\u5C06\u53EF\u80FD\u4F1A\u5212\u5206\u51FA\u4E00\u5757\u5185\u5B58\u6765\u4F5C\u4E3A\u53E5\u67C4\u6C60\uFF0Creference \u4E2D\u5B58\u50A8\u7684\u5C31\u662F\u5BF9\u8C61\u7684\u53E5\u67C4\u5730\u5740\uFF0C\u800C\u53E5\u67C4\u4E2D\u5305\u542B\u4E86\u5BF9\u8C61\u5B9E\u4F8B\u6570\u636E\u4E0E\u7C7B\u578B\u6570\u636E\u5404\u81EA\u5177\u4F53\u7684\u5730\u5740\u4FE1\u606F\uFF0C\u5176\u7ED3\u6784\u5982\u56FE\u6240\u793A\uFF1A</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/jvm-13.png" alt="\u901A\u8FC7\u53E5\u67C4\u8BBF\u95EE\u5BF9\u8C61"></p><ul><li>\u5982\u679C\u4F7F\u7528\u76F4\u63A5\u6307\u9488\u8BBF\u95EE\u7684\u8BDD\uFF0CJava \u5806\u4E2D\u5BF9\u8C61\u7684\u5185\u5B58\u5E03\u5C40\u5C31\u5FC5\u987B\u8003\u8651\u5982\u4F55\u653E\u7F6E\u8BBF\u95EE\u7C7B\u578B\u6570\u636E\u7684\u76F8\u5173\u4FE1\u606F\uFF0Creference \u4E2D\u5B58\u50A8\u7684\u76F4\u63A5\u5C31\u662F\u5BF9\u8C61\u5730\u5740\uFF0C\u5982\u679C\u53EA\u662F\u8BBF\u95EE\u5BF9\u8C61\u672C\u8EAB\u7684\u8BDD\uFF0C\u5C31\u4E0D\u9700\u8981\u591A\u4E00\u6B21\u95F4\u63A5\u8BBF\u95EE\u7684\u5F00\u9500\uFF0C\u5982\u56FE\u6240\u793A\uFF1A</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/jvm-14.png" alt="\u901A\u8FC7\u76F4\u63A5\u6307\u9488\u8BBF\u95EE\u5BF9\u8C61"></p><p>\u8FD9\u4E24\u79CD\u5BF9\u8C61\u8BBF\u95EE\u65B9\u5F0F\u5404\u6709\u4F18\u52BF\uFF0C\u4F7F\u7528\u53E5\u67C4\u6765\u8BBF\u95EE\u7684\u6700\u5927\u597D\u5904\u5C31\u662F reference \u4E2D\u5B58\u50A8\u7684\u662F\u7A33\u5B9A\u53E5\u67C4\u5730\u5740\uFF0C\u5728\u5BF9\u8C61\u88AB\u79FB\u52A8\uFF08\u5783\u573E\u6536\u96C6\u65F6\u79FB\u52A8\u5BF9\u8C61\u662F\u975E\u5E38\u666E\u904D\u7684\u884C\u4E3A\uFF09\u65F6\u53EA\u4F1A\u6539\u53D8\u53E5\u67C4\u4E2D\u7684\u5B9E\u4F8B\u6570\u636E\u6307\u9488\uFF0C\u800C reference \u672C\u8EAB\u4E0D\u9700\u8981\u88AB\u4FEE\u6539\u3002</p><p>\u4F7F\u7528\u76F4\u63A5\u6307\u9488\u6765\u8BBF\u95EE\u6700\u5927\u7684\u597D\u5904\u5C31\u662F\u901F\u5EA6\u66F4\u5FEB\uFF0C\u5B83\u8282\u7701\u4E86\u4E00\u6B21\u6307\u9488\u5B9A\u4F4D\u7684\u65F6\u95F4\u5F00\u9500\uFF0C\u7531\u4E8E\u5BF9\u8C61\u8BBF\u95EE\u5728 Java \u4E2D\u975E\u5E38\u9891\u7E41\uFF0C\u56E0\u6B64\u8FD9\u7C7B\u5F00\u9500\u79EF\u5C11\u6210\u591A\u4E5F\u662F\u4E00\u9879\u6781\u4E3A\u53EF\u89C2\u7684\u6267\u884C\u6210\u672C\u3002</p><p>HotSpot \u865A\u62DF\u673A\u4E3B\u8981\u4F7F\u7528\u76F4\u63A5\u6307\u9488\u6765\u8FDB\u884C\u5BF9\u8C61\u8BBF\u95EE\u3002</p><h3 id="_10-\u5185\u5B58\u6EA2\u51FA\u548C\u5185\u5B58\u6CC4\u6F0F\u662F\u4EC0\u4E48\u610F\u601D" tabindex="-1"><a class="header-anchor" href="#_10-\u5185\u5B58\u6EA2\u51FA\u548C\u5185\u5B58\u6CC4\u6F0F\u662F\u4EC0\u4E48\u610F\u601D" aria-hidden="true">#</a> 10.\u5185\u5B58\u6EA2\u51FA\u548C\u5185\u5B58\u6CC4\u6F0F\u662F\u4EC0\u4E48\u610F\u601D\uFF1F</h3><p>\u5185\u5B58\u6CC4\u9732\u5C31\u662F\u7533\u8BF7\u7684\u5185\u5B58\u7A7A\u95F4\u6CA1\u6709\u88AB\u6B63\u786E\u91CA\u653E\uFF0C\u5BFC\u81F4\u5185\u5B58\u88AB\u767D\u767D\u5360\u7528\u3002</p><p>\u5185\u5B58\u6EA2\u51FA\u5C31\u662F\u7533\u8BF7\u7684\u5185\u5B58\u8D85\u8FC7\u4E86\u53EF\u7528\u5185\u5B58\uFF0C\u5185\u5B58\u4E0D\u591F\u4E86\u3002</p><p>\u4E24\u8005\u5173\u7CFB\uFF1A\u5185\u5B58\u6CC4\u9732\u53EF\u80FD\u4F1A\u5BFC\u81F4\u5185\u5B58\u6EA2\u51FA\u3002</p><p>\u7528\u4E00\u4E2A\u6709\u5473\u9053\u7684\u6BD4\u55BB\uFF0C\u5185\u5B58\u6EA2\u51FA\u5C31\u662F\u6392\u961F\u53BB\u8E72\u5751\uFF0C\u53D1\u73B0\u6CA1\u5751\u4F4D\u4E86\uFF0C\u5185\u5B58\u6CC4\u6F0F\uFF0C\u5C31\u662F\u6709\u4EBA\u5360\u7740\u8305\u5751\u4E0D\u62C9\u5C4E\uFF0C\u5360\u7740\u8305\u5751\u4E0D\u62C9\u5C4E\u7684\u591A\u4E86\u53EF\u80FD\u4F1A\u5BFC\u81F4\u5751\u4F4D\u4E0D\u591F\u7528\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/jvm-15.png" alt="\u5185\u5B58\u6CC4\u6F0F\u3001\u5185\u5B58\u6EA2\u51FA"></p><h3 id="_11-\u80FD\u624B\u5199\u5185\u5B58\u6EA2\u51FA\u7684\u4F8B\u5B50\u5417" tabindex="-1"><a class="header-anchor" href="#_11-\u80FD\u624B\u5199\u5185\u5B58\u6EA2\u51FA\u7684\u4F8B\u5B50\u5417" aria-hidden="true">#</a> 11.\u80FD\u624B\u5199\u5185\u5B58\u6EA2\u51FA\u7684\u4F8B\u5B50\u5417\uFF1F</h3><p>\u5728 JVM \u7684\u51E0\u4E2A\u5185\u5B58\u533A\u57DF\u4E2D\uFF0C\u9664\u4E86\u7A0B\u5E8F\u8BA1\u6570\u5668\u5916\uFF0C\u5176\u4ED6\u51E0\u4E2A\u8FD0\u884C\u65F6\u533A\u57DF\u90FD\u6709\u53D1\u751F\u5185\u5B58\u6EA2\u51FA\uFF08OOM\uFF09\u5F02\u5E38\u7684\u53EF\u80FD\uFF0C\u91CD\u70B9\u5173\u6CE8\u5806\u548C\u6808\u3002</p><ul><li>Java \u5806\u6EA2\u51FA</li></ul><p>Java \u5806\u7528\u4E8E\u50A8\u5B58\u5BF9\u8C61\u5B9E\u4F8B\uFF0C\u53EA\u8981\u4E0D\u65AD\u521B\u5EFA\u4E0D\u53EF\u88AB\u56DE\u6536\u7684\u5BF9\u8C61\uFF0C\u6BD4\u5982\u9759\u6001\u5BF9\u8C61\uFF0C\u90A3\u4E48\u968F\u7740\u5BF9\u8C61\u6570\u91CF\u7684\u589E\u52A0\uFF0C\u603B\u5BB9\u91CF\u89E6\u53CA\u6700\u5927\u5806\u7684\u5BB9\u91CF\u9650\u5236\u540E\u5C31\u4F1A\u4EA7\u751F\u5185\u5B58\u6EA2\u51FA\u5F02\u5E38\uFF08OutOfMemoryError\uFF09\u3002</p><p>\u8FD9\u5C31\u76F8\u5F53\u4E8E\u4E00\u4E2A\u623F\u5B50\u91CC\uFF0C\u4E0D\u65AD\u5806\u79EF\u4E0D\u80FD\u88AB\u6536\u8D70\u7684\u6742\u7269\uFF0C\u90A3\u4E48\u623F\u5B50\u5F88\u5FEB\u5C31\u4F1A\u88AB\u5806\u6EE1\u4E86\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token doc-comment comment">/**
  * VM\u53C2\u6570\uFF1A -Xms20m -Xmx20m -XX:+HeapDumpOnOutOfMemoryError
  */</span>
 <span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">HeapOOM</span> <span class="token punctuation">{</span>
diff --git a/dist/assets/jvm.html.d7d28727.js b/dist/assets/jvm.html.cb0eace1.js
similarity index 99%
rename from dist/assets/jvm.html.d7d28727.js
rename to dist/assets/jvm.html.cb0eace1.js
index 939cc276..e6a94eb8 100644
--- a/dist/assets/jvm.html.d7d28727.js
+++ b/dist/assets/jvm.html.cb0eace1.js
@@ -1 +1 @@
-import{_ as i}from"./plugin-vue_export-helper.21dcd24c.js";import{r as l,o as h,c as d,a,b as n,e as t,d as e}from"./app.a0271b9c.js";const o={},s=t('<h1 id="java-\u865A\u62DF\u673A\u516B\u80A1\u6587-\u80CC\u8BF5\u7248-\u5FC5\u770B" tabindex="-1"><a class="header-anchor" href="#java-\u865A\u62DF\u673A\u516B\u80A1\u6587-\u80CC\u8BF5\u7248-\u5FC5\u770B" aria-hidden="true">#</a> Java \u865A\u62DF\u673A\u516B\u80A1\u6587\uFF08\u80CC\u8BF5\u7248\uFF09\u5FC5\u770B\u{1F44D}</h1><h3 id="\u7B80\u8FF0jvm\u5185\u5B58\u6A21\u578B" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0jvm\u5185\u5B58\u6A21\u578B" aria-hidden="true">#</a> \u7B80\u8FF0JVM\u5185\u5B58\u6A21\u578B</h3><p>\u7EBF\u7A0B\u79C1\u6709\u7684\u8FD0\u884C\u65F6\u6570\u636E\u533A: \u7A0B\u5E8F\u8BA1\u6570\u5668\u3001Java \u865A\u62DF\u673A\u6808\u3001\u672C\u5730\u65B9\u6CD5\u6808\u3002</p><p>\u7EBF\u7A0B\u5171\u4EAB\u7684\u8FD0\u884C\u65F6\u6570\u636E\u533A\uFF1AJava \u5806\u3001\u65B9\u6CD5\u533A\u3002</p><h3 id="\u7B80\u8FF0\u7A0B\u5E8F\u8BA1\u6570\u5668" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0\u7A0B\u5E8F\u8BA1\u6570\u5668" aria-hidden="true">#</a> \u7B80\u8FF0\u7A0B\u5E8F\u8BA1\u6570\u5668</h3><p>\u7A0B\u5E8F\u8BA1\u6570\u5668\u8868\u793A\u5F53\u524D\u7EBF\u7A0B\u6240\u6267\u884C\u7684\u5B57\u8282\u7801\u7684\u884C\u53F7\u6307\u793A\u5668\u3002</p><p>\u7A0B\u5E8F\u8BA1\u6570\u5668\u4E0D\u4F1A\u4EA7\u751FStackOverflowError\u548COutOfMemoryError\u3002</p><h3 id="\u7B80\u8FF0\u865A\u62DF\u673A\u6808" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0\u865A\u62DF\u673A\u6808" aria-hidden="true">#</a> \u7B80\u8FF0\u865A\u62DF\u673A\u6808</h3><p>Java \u865A\u62DF\u673A\u6808\u7528\u6765\u63CF\u8FF0 Java \u65B9\u6CD5\u6267\u884C\u7684\u5185\u5B58\u6A21\u578B\u3002\u7EBF\u7A0B\u521B\u5EFA\u65F6\u5C31\u4F1A\u5206\u914D\u4E00\u4E2A\u6808\u7A7A\u95F4\uFF0C\u7EBF\u7A0B\u7ED3\u675F\u540E\u6808\u7A7A\u95F4\u88AB\u56DE\u6536\u3002</p><p>\u6808\u4E2D\u5143\u7D20\u7528\u4E8E\u652F\u6301\u865A\u62DF\u673A\u8FDB\u884C\u65B9\u6CD5\u8C03\u7528\uFF0C\u6BCF\u4E2A\u65B9\u6CD5\u5728\u6267\u884C\u65F6\u90FD\u4F1A\u521B\u5EFA\u4E00\u4E2A\u6808\u5E27\u5B58\u50A8\u65B9\u6CD5\u7684\u5C40\u90E8\u53D8\u91CF\u8868\u3001\u64CD\u4F5C\u6808\u3001\u52A8\u6001\u94FE\u63A5\u548C\u8FD4\u56DE\u5730\u5740\u7B49\u4FE1\u606F\u3002</p><p>\u865A\u62DF\u673A\u6808\u4F1A\u4EA7\u751F\u4E24\u7C7B\u5F02\u5E38\uFF1A</p><ul><li>StackOverflowError\uFF1A\u7EBF\u7A0B\u8BF7\u6C42\u7684\u6808\u6DF1\u5EA6\u5927\u4E8E\u865A\u62DF\u673A\u5141\u8BB8\u7684\u6DF1\u5EA6\u629B\u51FA\u3002</li><li>OutOfMemoryError\uFF1A\u5982\u679C JVM \u6808\u5BB9\u91CF\u53EF\u4EE5\u52A8\u6001\u6269\u5C55\uFF0C\u865A\u62DF\u673A\u6808\u5360\u7528\u5185\u5B58\u8D85\u51FA\u629B\u51FA\u3002</li></ul><h3 id="\u7B80\u8FF0\u672C\u5730\u65B9\u6CD5\u6808" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0\u672C\u5730\u65B9\u6CD5\u6808" aria-hidden="true">#</a> \u7B80\u8FF0\u672C\u5730\u65B9\u6CD5\u6808</h3><p>\u672C\u5730\u65B9\u6CD5\u6808\u4E0E\u865A\u62DF\u673A\u6808\u4F5C\u7528\u76F8\u4F3C\uFF0C\u4E0D\u540C\u7684\u662F\u865A\u62DF\u673A\u6808\u4E3A\u865A\u62DF\u673A\u6267\u884C Java \u65B9\u6CD5\u670D\u52A1\uFF0C\u672C\u5730\u65B9\u6CD5\u6808\u4E3A\u672C\u5730\u65B9\u6CD5\u670D\u52A1\u3002\u53EF\u4EE5\u5C06\u865A\u62DF\u673A\u6808\u770B\u4F5C\u666E\u901A\u7684java\u51FD\u6570\u5BF9\u5E94\u7684\u5185\u5B58\u6A21\u578B\uFF0C\u672C\u5730\u65B9\u6CD5\u6808\u770B\u4F5C\u7531native\u5173\u952E\u8BCD\u4FEE\u9970\u7684\u51FD\u6570\u5BF9\u5E94\u7684\u5185\u5B58\u6A21\u578B\u3002</p><p>\u672C\u5730\u65B9\u6CD5\u6808\u4F1A\u4EA7\u751F\u4E24\u7C7B\u5F02\u5E38\uFF1A</p><ul><li>StackOverflowError\uFF1A\u7EBF\u7A0B\u8BF7\u6C42\u7684\u6808\u6DF1\u5EA6\u5927\u4E8E\u865A\u62DF\u673A\u5141\u8BB8\u7684\u6DF1\u5EA6\u629B\u51FA\u3002</li><li>OutOfMemoryError\uFF1A\u5982\u679C JVM \u6808\u5BB9\u91CF\u53EF\u4EE5\u52A8\u6001\u6269\u5C55\uFF0C\u865A\u62DF\u673A\u6808\u5360\u7528\u5185\u5B58\u8D85\u51FA\u629B\u51FA\u3002</li></ul><h3 id="\u7B80\u8FF0jvm\u4E2D\u7684\u5806" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0jvm\u4E2D\u7684\u5806" aria-hidden="true">#</a> \u7B80\u8FF0JVM\u4E2D\u7684\u5806</h3><p>\u5806\u4E3B\u8981\u4F5C\u7528\u662F\u5B58\u653E\u5BF9\u8C61\u5B9E\u4F8B\uFF0CJava \u91CC\u51E0\u4E4E\u6240\u6709\u5BF9\u8C61\u5B9E\u4F8B\u90FD\u5728\u5806\u4E0A\u5206\u914D\u5185\u5B58\uFF0C\u5806\u4E5F\u662F\u5185\u5B58\u7BA1\u7406\u4E2D\u6700\u5927\u7684\u4E00\u5757\u3002Java\u7684\u5783\u573E\u56DE\u6536\u4E3B\u8981\u5C31\u662F\u9488\u5BF9\u5806\u8FD9\u4E00\u533A\u57DF\u8FDB\u884C\u3002 \u53EF\u901A\u8FC7 -Xms \u548C -Xmx \u8BBE\u7F6E\u5806\u7684\u6700\u5C0F\u548C\u6700\u5927\u5BB9\u91CF\u3002</p><p>\u5806\u4F1A\u629B\u51FA OutOfMemoryError\u5F02\u5E38\u3002</p><h3 id="\u7B80\u8FF0\u65B9\u6CD5\u533A" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0\u65B9\u6CD5\u533A" aria-hidden="true">#</a> \u7B80\u8FF0\u65B9\u6CD5\u533A</h3><p>\u65B9\u6CD5\u533A\u7528\u4E8E\u5B58\u50A8\u88AB\u865A\u62DF\u673A\u52A0\u8F7D\u7684\u7C7B\u4FE1\u606F\u3001\u5E38\u91CF\u3001\u9759\u6001\u53D8\u91CF\u7B49\u6570\u636E\u3002</p><p>JDK6\u4E4B\u524D\u4F7F\u7528\u6C38\u4E45\u4EE3\u5B9E\u73B0\u65B9\u6CD5\u533A\uFF0C\u5BB9\u6613\u5185\u5B58\u6EA2\u51FA\u3002JDK7 \u628A\u653E\u5728\u6C38\u4E45\u4EE3\u7684\u5B57\u7B26\u4E32\u5E38\u91CF\u6C60\u3001\u9759\u6001\u53D8\u91CF\u7B49\u79FB\u51FA\uFF0CJDK8 \u4E2D\u629B\u5F03\u6C38\u4E45\u4EE3\uFF0C\u6539\u7528\u5728\u672C\u5730\u5185\u5B58\u4E2D\u5B9E\u73B0\u7684\u5143\u7A7A\u95F4\u6765\u5B9E\u73B0\u65B9\u6CD5\u533A\uFF0C\u628A JDK 7 \u4E2D\u6C38\u4E45\u4EE3\u5185\u5BB9\u79FB\u5230\u5143\u7A7A\u95F4\u3002</p><p>\u65B9\u6CD5\u533A\u4F1A\u629B\u51FA OutOfMemoryError\u5F02\u5E38\u3002</p><h3 id="\u7B80\u8FF0\u8FD0\u884C\u65F6\u5E38\u91CF\u6C60" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0\u8FD0\u884C\u65F6\u5E38\u91CF\u6C60" aria-hidden="true">#</a> \u7B80\u8FF0\u8FD0\u884C\u65F6\u5E38\u91CF\u6C60</h3><p>\u8FD0\u884C\u65F6\u5E38\u91CF\u6C60\u5B58\u653E\u5E38\u91CF\u6C60\u8868\uFF0C\u7528\u4E8E\u5B58\u653E\u7F16\u8BD1\u5668\u751F\u6210\u7684\u5404\u79CD\u5B57\u9762\u91CF\u4E0E\u7B26\u53F7\u5F15\u7528\u3002\u4E00\u822C\u9664\u4E86\u4FDD\u5B58 Class \u6587\u4EF6\u4E2D\u63CF\u8FF0\u7684\u7B26\u53F7\u5F15\u7528\u5916\uFF0C\u8FD8\u4F1A\u628A\u7B26\u53F7\u5F15\u7528\u7FFB\u8BD1\u7684\u76F4\u63A5\u5F15\u7528\u4E5F\u5B58\u50A8\u5728\u8FD0\u884C\u65F6\u5E38\u91CF\u6C60\u3002\u9664\u6B64\u4E4B\u5916\uFF0C\u4E5F\u4F1A\u5B58\u653E\u5B57\u7B26\u4E32\u57FA\u672C\u7C7B\u578B\u3002</p><p>JDK8\u4E4B\u524D\uFF0C\u653E\u5728\u65B9\u6CD5\u533A\uFF0C\u5927\u5C0F\u53D7\u9650\u4E8E\u65B9\u6CD5\u533A\u3002JDK8\u5C06\u8FD0\u884C\u65F6\u5E38\u91CF\u6C60\u5B58\u653E\u5806\u4E2D\u3002</p><h3 id="\u7B80\u8FF0\u76F4\u63A5\u5185\u5B58" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0\u76F4\u63A5\u5185\u5B58" aria-hidden="true">#</a> \u7B80\u8FF0\u76F4\u63A5\u5185\u5B58</h3><p>\u76F4\u63A5\u5185\u5B58\u4E5F\u79F0\u4E3A\u5806\u5916\u5185\u5B58\uFF0C\u5C31\u662F\u628A\u5185\u5B58\u5BF9\u8C61\u5206\u914D\u5728JVM\u5806\u5916\u7684\u5185\u5B58\u533A\u57DF\u3002\u8FD9\u90E8\u5206\u5185\u5B58\u4E0D\u662F\u865A\u62DF\u673A\u7BA1\u7406\uFF0C\u800C\u662F\u7531\u64CD\u4F5C\u7CFB\u7EDF\u6765\u7BA1\u7406\u3002 Java\u901A\u8FC7DriectByteBuffer\u5BF9\u5176\u8FDB\u884C\u64CD\u4F5C\uFF0C\u907F\u514D\u4E86\u5728 Java \u5806\u548C Native\u5806\u6765\u56DE\u590D\u5236\u6570\u636E\u3002</p><h3 id="\u7B80\u8FF0java\u521B\u5EFA\u5BF9\u8C61\u7684\u8FC7\u7A0B" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0java\u521B\u5EFA\u5BF9\u8C61\u7684\u8FC7\u7A0B" aria-hidden="true">#</a> \u7B80\u8FF0Java\u521B\u5EFA\u5BF9\u8C61\u7684\u8FC7\u7A0B</h3><ul><li>\u68C0\u67E5\u8BE5\u6307\u4EE4\u7684\u53C2\u6570\u80FD\u5426\u5728\u5E38\u91CF\u6C60\u4E2D\u5B9A\u4F4D\u5230\u4E00\u4E2A\u7C7B\u7684\u7B26\u53F7\u5F15\u7528\uFF0C\u5E76\u68C0\u67E5\u5F15\u7528\u4EE3\u8868\u7684\u7C7B\u662F\u5426\u5DF2\u88AB\u52A0\u8F7D\u3001\u89E3\u6790\u548C\u521D\u59CB\u5316\uFF0C\u5982\u679C\u6CA1\u6709\u5C31\u5148\u6267\u884C\u7C7B\u52A0\u8F7D\u3002</li><li>\u901A\u8FC7\u68C0\u67E5\u901A\u8FC7\u540E\u865A\u62DF\u673A\u5C06\u4E3A\u65B0\u751F\u5BF9\u8C61\u5206\u914D\u5185\u5B58\u3002</li><li>\u5B8C\u6210\u5185\u5B58\u5206\u914D\u540E\u865A\u62DF\u673A\u5C06\u6210\u5458\u53D8\u91CF\u8BBE\u4E3A\u96F6\u503C</li><li>\u8BBE\u7F6E\u5BF9\u8C61\u5934\uFF0C\u5305\u62EC\u54C8\u5E0C\u7801\u3001GC \u4FE1\u606F\u3001\u9501\u4FE1\u606F\u3001\u5BF9\u8C61\u6240\u5C5E\u7C7B\u7684\u7C7B\u5143\u4FE1\u606F\u7B49\u3002</li><li>\u6267\u884C init \u65B9\u6CD5\uFF0C\u521D\u59CB\u5316\u6210\u5458\u53D8\u91CF\uFF0C\u6267\u884C\u5B9E\u4F8B\u5316\u4EE3\u7801\u5757\uFF0C\u8C03\u7528\u7C7B\u7684\u6784\u9020\u65B9\u6CD5\uFF0C\u5E76\u628A\u5806\u5185\u5BF9\u8C61\u7684\u9996\u5730\u5740\u8D4B\u503C\u7ED9\u5F15\u7528\u53D8\u91CF\u3002</li></ul><h3 id="\u7B80\u8FF0jvm\u7ED9\u5BF9\u8C61\u5206\u914D\u5185\u5B58\u7684\u7B56\u7565" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0jvm\u7ED9\u5BF9\u8C61\u5206\u914D\u5185\u5B58\u7684\u7B56\u7565" aria-hidden="true">#</a> \u7B80\u8FF0JVM\u7ED9\u5BF9\u8C61\u5206\u914D\u5185\u5B58\u7684\u7B56\u7565</h3><ul><li>\u6307\u9488\u78B0\u649E\uFF1A\u8FD9\u79CD\u65B9\u5F0F\u5728\u5185\u5B58\u4E2D\u653E\u4E00\u4E2A\u6307\u9488\u4F5C\u4E3A\u5206\u754C\u6307\u793A\u5668\u5C06\u4F7F\u7528\u8FC7\u7684\u5185\u5B58\u653E\u5728\u4E00\u8FB9\uFF0C\u7A7A\u95F2\u7684\u653E\u5728\u53E6\u4E00\u8FB9\uFF0C\u901A\u8FC7\u6307\u9488\u632A\u52A8\u5B8C\u6210\u5206\u914D\u3002</li><li>\u7A7A\u95F2\u5217\u8868\uFF1A\u5BF9\u4E8E Java \u5806\u5185\u5B58\u4E0D\u89C4\u6574\u7684\u60C5\u51B5\uFF0C\u865A\u62DF\u673A\u5FC5\u987B\u7EF4\u62A4\u4E00\u4E2A\u5217\u8868\u8BB0\u5F55\u54EA\u4E9B\u5185\u5B58\u53EF\u7528\uFF0C\u5728\u5206\u914D\u65F6\u4ECE\u5217\u8868\u4E2D\u627E\u5230\u4E00\u5757\u8DB3\u591F\u5927\u7684\u7A7A\u95F4\u5212\u5206\u7ED9\u5BF9\u8C61\u5E76\u66F4\u65B0\u5217\u8868\u8BB0\u5F55\u3002</li></ul><h3 id="java\u5BF9\u8C61\u5185\u5B58\u5206\u914D\u662F\u5982\u4F55\u4FDD\u8BC1\u7EBF\u7A0B\u5B89\u5168\u7684" tabindex="-1"><a class="header-anchor" href="#java\u5BF9\u8C61\u5185\u5B58\u5206\u914D\u662F\u5982\u4F55\u4FDD\u8BC1\u7EBF\u7A0B\u5B89\u5168\u7684" aria-hidden="true">#</a> Java\u5BF9\u8C61\u5185\u5B58\u5206\u914D\u662F\u5982\u4F55\u4FDD\u8BC1\u7EBF\u7A0B\u5B89\u5168\u7684</h3><p>\u7B2C\u4E00\u79CD\u65B9\u6CD5\uFF0C\u91C7\u7528CAS\u673A\u5236\uFF0C\u914D\u5408\u5931\u8D25\u91CD\u8BD5\u7684\u65B9\u5F0F\u4FDD\u8BC1\u66F4\u65B0\u64CD\u4F5C\u7684\u539F\u5B50\u6027\u3002\u8BE5\u65B9\u5F0F\u6548\u7387\u4F4E\u3002</p><p>\u7B2C\u4E8C\u79CD\u65B9\u6CD5\uFF0C\u6BCF\u4E2A\u7EBF\u7A0B\u5728Java\u5806\u4E2D\u9884\u5148\u5206\u914D\u4E00\u5C0F\u5757\u5185\u5B58\uFF0C\u7136\u540E\u518D\u7ED9\u5BF9\u8C61\u5206\u914D\u5185\u5B58\u7684\u65F6\u5019\uFF0C\u76F4\u63A5\u5728\u81EA\u5DF1\u8FD9\u5757&quot;\u79C1\u6709&quot;\u5185\u5B58\u4E2D\u5206\u914D\u3002\u4E00\u822C\u91C7\u7528\u8FD9\u79CD\u7B56\u7565\u3002</p><h3 id="\u7B80\u8FF0\u5BF9\u8C61\u7684\u5185\u5B58\u5E03\u5C40" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0\u5BF9\u8C61\u7684\u5185\u5B58\u5E03\u5C40" aria-hidden="true">#</a> \u7B80\u8FF0\u5BF9\u8C61\u7684\u5185\u5B58\u5E03\u5C40</h3><p>\u5BF9\u8C61\u5728\u5806\u5185\u5B58\u7684\u5B58\u50A8\u5E03\u5C40\u53EF\u5206\u4E3A\u5BF9\u8C61\u5934\u3001\u5B9E\u4F8B\u6570\u636E\u548C\u5BF9\u9F50\u586B\u5145\u3002</p><p>1\uFF09\u5BF9\u8C61\u5934\u4E3B\u8981\u5305\u542B\u4E24\u90E8\u5206\u6570\u636E\uFF1A MarkWord\u3001\u7C7B\u578B\u6307\u9488\u3002</p><p>MarkWord \u7528\u4E8E\u5B58\u50A8\u54C8\u5E0C\u7801\uFF08HashCode\uFF09\u3001GC\u5206\u4EE3\u5E74\u9F84\u3001\u9501\u72B6\u6001\u6807\u5FD7\u4F4D\u3001\u7EBF\u7A0B\u6301\u6709\u7684\u9501\u3001\u504F\u5411\u7EBF\u7A0BID\u7B49\u4FE1\u606F\u3002</p><p>\u7C7B\u578B\u6307\u9488\u5373\u5BF9\u8C61\u6307\u5411\u4ED6\u7684\u7C7B\u5143\u6570\u636E\u6307\u9488\uFF0C\u5982\u679C\u5BF9\u8C61\u662F\u4E00\u4E2A Java \u6570\u7EC4\uFF0C\u4F1A\u6709\u4E00\u5757\u7528\u4E8E\u8BB0\u5F55\u6570\u7EC4\u957F\u5EA6\u7684\u6570\u636E\u3002</p><p>2\uFF09\u5B9E\u4F8B\u6570\u636E\u5B58\u50A8\u4EE3\u7801\u4E2D\u6240\u5B9A\u4E49\u7684\u5404\u79CD\u7C7B\u578B\u7684\u5B57\u6BB5\u4FE1\u606F\u3002</p><p>3\uFF09\u5BF9\u9F50\u586B\u5145\u8D77\u5360\u4F4D\u4F5C\u7528\u3002HotSpot \u865A\u62DF\u673A\u8981\u6C42\u5BF9\u8C61\u7684\u8D77\u59CB\u5730\u5740\u5FC5\u987B\u662F8\u7684\u6574\u6570\u500D\uFF0C\u56E0\u6B64\u9700\u8981\u5BF9\u9F50\u586B\u5145\u3002</p><h3 id="\u5982\u4F55\u5224\u65AD\u5BF9\u8C61\u662F\u5426\u662F\u5783\u573E" tabindex="-1"><a class="header-anchor" href="#\u5982\u4F55\u5224\u65AD\u5BF9\u8C61\u662F\u5426\u662F\u5783\u573E" aria-hidden="true">#</a> \u5982\u4F55\u5224\u65AD\u5BF9\u8C61\u662F\u5426\u662F\u5783\u573E</h3><p>1\uFF09\u5F15\u7528\u8BA1\u6570\u6CD5\uFF1A</p><p>\u8BBE\u7F6E\u5F15\u7528\u8BA1\u6570\u5668\uFF0C\u5BF9\u8C61\u88AB\u5F15\u7528\u8BA1\u6570\u5668\u52A0 1\uFF0C\u5F15\u7528\u5931\u6548\u65F6\u8BA1\u6570\u5668\u51CF 1\uFF0C\u5982\u679C\u8BA1\u6570\u5668\u4E3A 0 \u5219\u88AB\u6807\u8BB0\u4E3A\u5783\u573E\u3002\u4F1A\u5B58\u5728\u5BF9\u8C61\u95F4\u5FAA\u73AF\u5F15\u7528\u7684\u95EE\u9898\uFF0C\u4E00\u822C\u4E0D\u4F7F\u7528\u8FD9\u79CD\u65B9\u6CD5\u3002</p><p>2\uFF09\u53EF\u8FBE\u6027\u5206\u6790\uFF1A</p><p>\u901A\u8FC7 GC Roots \u7684\u6839\u5BF9\u8C61\u4F5C\u4E3A\u8D77\u59CB\u8282\u70B9\uFF0C\u4ECE\u8FD9\u4E9B\u8282\u70B9\u5F00\u59CB\uFF0C\u6839\u636E\u5F15\u7528\u5173\u7CFB\u5411\u4E0B\u641C\u7D22\uFF0C\u5982\u679C\u67D0\u4E2A\u5BF9\u8C61\u6CA1\u6709\u88AB\u641C\u5230\uFF0C\u5219\u4F1A\u88AB\u6807\u8BB0\u4E3A\u5783\u573E\u3002\u53EF\u4F5C\u4E3A GC Roots \u7684\u5BF9\u8C61\u5305\u62EC\u865A\u62DF\u673A\u6808\u548C\u672C\u5730\u65B9\u6CD5\u6808\u4E2D\u5F15\u7528\u7684\u5BF9\u8C61\u3001\u7C7B\u9759\u6001\u5C5E\u6027\u5F15\u7528\u7684\u5BF9\u8C61\u3001\u5E38\u91CF\u5F15\u7528\u7684\u5BF9\u8C61\u3002</p><h3 id="\u7B80\u8FF0java\u7684\u5F15\u7528\u7C7B\u578B" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0java\u7684\u5F15\u7528\u7C7B\u578B" aria-hidden="true">#</a> \u7B80\u8FF0java\u7684\u5F15\u7528\u7C7B\u578B</h3><ul><li>\u5F3A\u5F15\u7528\uFF1A \u88AB\u5F3A\u5F15\u7528\u5173\u8054\u7684\u5BF9\u8C61\u4E0D\u4F1A\u88AB\u56DE\u6536\u3002\u4E00\u822C\u91C7\u7528 new \u65B9\u6CD5\u521B\u5EFA\u5F3A\u5F15\u7528\u3002</li><li>\u8F6F\u5F15\u7528\uFF1A\u88AB\u8F6F\u5F15\u7528\u5173\u8054\u7684\u5BF9\u8C61\u53EA\u6709\u5728\u5185\u5B58\u4E0D\u591F\u7684\u60C5\u51B5\u4E0B\u624D\u4F1A\u88AB\u56DE\u6536\u3002\u4E00\u822C\u91C7\u7528 SoftReference \u7C7B\u6765\u521B\u5EFA\u8F6F\u5F15\u7528\u3002</li><li>\u5F31\u5F15\u7528\uFF1A\u5783\u573E\u6536\u96C6\u5668\u78B0\u5230\u5373\u56DE\u6536\uFF0C\u4E5F\u5C31\u662F\u8BF4\u5B83\u53EA\u80FD\u5B58\u6D3B\u5230\u4E0B\u4E00\u6B21\u5783\u573E\u56DE\u6536\u53D1\u751F\u4E4B\u524D\u3002\u4E00\u822C\u91C7\u7528 WeakReference \u7C7B\u6765\u521B\u5EFA\u5F31\u5F15\u7528\u3002</li><li>\u865A\u5F15\u7528\uFF1A \u65E0\u6CD5\u901A\u8FC7\u8BE5\u5F15\u7528\u83B7\u53D6\u5BF9\u8C61\u3002\u552F\u4E00\u76EE\u7684\u5C31\u662F\u4E3A\u4E86\u80FD\u5728\u5BF9\u8C61\u88AB\u56DE\u6536\u65F6\u6536\u5230\u4E00\u4E2A\u7CFB\u7EDF\u901A\u77E5\u3002\u865A\u5F15\u7528\u5FC5\u987B\u4E0E\u5F15\u7528\u961F\u5217\u8054\u5408\u4F7F\u7528\u3002</li></ul><h3 id="\u7B80\u8FF0\u6807\u8BB0\u6E05\u9664\u7B97\u6CD5\u3001\u6807\u8BB0\u6574\u7406\u7B97\u6CD5\u548C\u6807\u8BB0\u590D\u5236\u7B97\u6CD5" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0\u6807\u8BB0\u6E05\u9664\u7B97\u6CD5\u3001\u6807\u8BB0\u6574\u7406\u7B97\u6CD5\u548C\u6807\u8BB0\u590D\u5236\u7B97\u6CD5" aria-hidden="true">#</a> \u7B80\u8FF0\u6807\u8BB0\u6E05\u9664\u7B97\u6CD5\u3001\u6807\u8BB0\u6574\u7406\u7B97\u6CD5\u548C\u6807\u8BB0\u590D\u5236\u7B97\u6CD5</h3><ul><li>\u6807\u8BB0\u6E05\u9664\u7B97\u6CD5\uFF1A\u5148\u6807\u8BB0\u9700\u6E05\u9664\u7684\u5BF9\u8C61\uFF0C\u4E4B\u540E\u7EDF\u4E00\u56DE\u6536\u3002\u8FD9\u79CD\u65B9\u6CD5\u6548\u7387\u4E0D\u9AD8\uFF0C\u4F1A\u4EA7\u751F\u5927\u91CF\u4E0D\u8FDE\u7EED\u7684\u788E\u7247\u3002</li><li>\u6807\u8BB0\u6574\u7406\u7B97\u6CD5\uFF1A\u5148\u6807\u8BB0\u5B58\u6D3B\u5BF9\u8C61\uFF0C\u7136\u540E\u8BA9\u6240\u6709\u5B58\u6D3B\u5BF9\u8C61\u5411\u4E00\u7AEF\u79FB\u52A8\uFF0C\u4E4B\u540E\u6E05\u7406\u7AEF\u8FB9\u754C\u4EE5\u5916\u7684\u5185\u5B58</li><li>\u6807\u8BB0\u590D\u5236\u7B97\u6CD5\uFF1A\u5C06\u53EF\u7528\u5185\u5B58\u6309\u5BB9\u91CF\u5212\u5206\u4E3A\u5927\u5C0F\u76F8\u7B49\u7684\u4E24\u5757\uFF0C\u6BCF\u6B21\u53EA\u4F7F\u7528\u5176\u4E2D\u4E00\u5757\u3002\u5F53\u4F7F\u7528\u7684\u8FD9\u5757\u7A7A\u95F4\u7528\u5B8C\u4E86\uFF0C\u5C31\u5C06\u5B58\u6D3B\u5BF9\u8C61\u590D\u5236\u5230\u53E6\u4E00\u5757\uFF0C\u518D\u628A\u5DF2\u4F7F\u7528\u8FC7\u7684\u5185\u5B58\u7A7A\u95F4\u4E00\u6B21\u6E05\u7406\u6389\u3002</li></ul><h3 id="\u7B80\u8FF0\u5206\u4EE3\u6536\u96C6\u7B97\u6CD5" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0\u5206\u4EE3\u6536\u96C6\u7B97\u6CD5" aria-hidden="true">#</a> \u7B80\u8FF0\u5206\u4EE3\u6536\u96C6\u7B97\u6CD5</h3><p>\u6839\u636E\u5BF9\u8C61\u5B58\u6D3B\u5468\u671F\u5C06\u5185\u5B58\u5212\u5206\u4E3A\u51E0\u5757\uFF0C\u4E0D\u540C\u5757\u91C7\u7528\u9002\u5F53\u7684\u6536\u96C6\u7B97\u6CD5\u3002</p><p>\u4E00\u822C\u5C06\u5806\u5206\u4E3A\u65B0\u751F\u4EE3\u548C\u8001\u5E74\u4EE3\uFF0C\u5BF9\u8FD9\u4E24\u5757\u91C7\u7528\u4E0D\u540C\u7684\u7B97\u6CD5\u3002</p><p>\u65B0\u751F\u4EE3\u4F7F\u7528\uFF1A\u6807\u8BB0\u590D\u5236\u7B97\u6CD5</p><p>\u8001\u5E74\u4EE3\u4F7F\u7528\uFF1A\u6807\u8BB0\u6E05\u9664\u6216\u8005\u6807\u8BB0\u6574\u7406\u7B97\u6CD5</p><h3 id="\u7B80\u8FF0serial\u5783\u573E\u6536\u96C6\u5668" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0serial\u5783\u573E\u6536\u96C6\u5668" aria-hidden="true">#</a> \u7B80\u8FF0Serial\u5783\u573E\u6536\u96C6\u5668</h3><p>Serial\u5783\u573E\u6536\u96C6\u5668\u662F\u5355\u7EBF\u7A0B\u4E32\u884C\u6536\u96C6\u5668\u3002\u5783\u573E\u56DE\u6536\u7684\u65F6\u5019\uFF0C\u5FC5\u987B\u6682\u505C\u5176\u4ED6\u6240\u6709\u7EBF\u7A0B\u3002\u65B0\u751F\u4EE3\u4F7F\u7528\u6807\u8BB0\u590D\u5236\u7B97\u6CD5\uFF0C\u8001\u5E74\u4EE3\u4F7F\u7528\u6807\u8BB0\u6574\u7406\u7B97\u6CD5\u3002\u7B80\u5355\u9AD8\u6548\u3002</p><h3 id="\u7B80\u8FF0parnew\u5783\u573E\u6536\u96C6\u5668" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0parnew\u5783\u573E\u6536\u96C6\u5668" aria-hidden="true">#</a> \u7B80\u8FF0ParNew\u5783\u573E\u6536\u96C6\u5668</h3><p>ParNew\u5783\u573E\u6536\u96C6\u5668\u53EF\u4EE5\u770B\u4F5CSerial\u5783\u573E\u6536\u96C6\u5668\u7684\u591A\u7EBF\u7A0B\u7248\u672C\uFF0C\u65B0\u751F\u4EE3\u4F7F\u7528\u6807\u8BB0\u590D\u5236\u7B97\u6CD5\uFF0C\u8001\u5E74\u4EE3\u4F7F\u7528\u6807\u8BB0\u6574\u7406\u7B97\u6CD5\u3002</p><h3 id="\u7B80\u8FF0parallel-scavenge\u5783\u573E\u6536\u96C6\u5668" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0parallel-scavenge\u5783\u573E\u6536\u96C6\u5668" aria-hidden="true">#</a> \u7B80\u8FF0Parallel Scavenge\u5783\u573E\u6536\u96C6\u5668</h3><p>\u6CE8\u91CD\u541E\u5410\u91CF\uFF0C\u5373 CPU\u8FD0\u884C\u4EE3\u7801\u65F6\u95F4/CPU\u8017\u65F6\u603B\u65F6\u95F4\uFF08CPU\u8FD0\u884C\u4EE3\u7801\u65F6\u95F4+ \u5783\u573E\u56DE\u6536\u65F6\u95F4\uFF09\u3002\u65B0\u751F\u4EE3\u4F7F\u7528\u6807\u8BB0\u590D\u5236\u7B97\u6CD5\uFF0C\u8001\u5E74\u4EE3\u4F7F\u7528\u6807\u8BB0\u6574\u7406\u7B97\u6CD5\u3002</p><h3 id="\u7B80\u8FF0cms\u5783\u573E\u6536\u96C6\u5668" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0cms\u5783\u573E\u6536\u96C6\u5668" aria-hidden="true">#</a> \u7B80\u8FF0CMS\u5783\u573E\u6536\u96C6\u5668</h3><p>CMS\u5783\u573E\u6536\u96C6\u5668\u6CE8\u91CD\u6700\u77ED\u65F6\u95F4\u505C\u987F\u3002CMS\u5783\u573E\u6536\u96C6\u5668\u4E3A\u6700\u65E9\u63D0\u51FA\u7684\u5E76\u53D1\u6536\u96C6\u5668\uFF0C\u5783\u573E\u6536\u96C6\u7EBF\u7A0B\u4E0E\u7528\u6237\u7EBF\u7A0B\u540C\u65F6\u5DE5\u4F5C\u3002\u91C7\u7528\u6807\u8BB0\u6E05\u9664\u7B97\u6CD5\u3002\u8BE5\u6536\u96C6\u5668\u5206\u4E3A\u521D\u59CB\u6807\u8BB0\u3001\u5E76\u53D1\u6807\u8BB0\u3001\u5E76\u53D1\u9884\u6E05\u7406\u3001\u5E76\u53D1\u6E05\u9664\u3001\u5E76\u53D1\u91CD\u7F6E\u8FD9\u4E48\u51E0\u4E2A\u6B65\u9AA4\u3002</p><ul><li>\u521D\u59CB\u6807\u8BB0\uFF1A\u6682\u505C\u5176\u4ED6\u7EBF\u7A0B(stop the world)\uFF0C\u6807\u8BB0\u4E0EGC roots\u76F4\u63A5\u5173\u8054\u7684\u5BF9\u8C61\u3002</li><li>\u5E76\u53D1\u6807\u8BB0\uFF1A\u53EF\u8FBE\u6027\u5206\u6790\u8FC7\u7A0B(\u7A0B\u5E8F\u4E0D\u4F1A\u505C\u987F)\u3002</li><li>\u5E76\u53D1\u9884\u6E05\u7406\uFF1A\u67E5\u627E\u6267\u884C\u5E76\u53D1\u6807\u8BB0\u9636\u6BB5\u4ECE\u5E74\u8F7B\u4EE3\u664B\u5347\u5230\u8001\u5E74\u4EE3\u7684\u5BF9\u8C61\uFF0C\u91CD\u65B0\u6807\u8BB0\uFF0C\u6682\u505C\u865A\u62DF\u673A\uFF08stop the world\uFF09\u626B\u63CFCMS\u5806\u4E2D\u5269\u4F59\u5BF9\u8C61\u3002</li><li>\u5E76\u53D1\u6E05\u9664\uFF1A\u6E05\u7406\u5783\u573E\u5BF9\u8C61\uFF0C(\u7A0B\u5E8F\u4E0D\u4F1A\u505C\u987F)\u3002</li><li>\u5E76\u53D1\u91CD\u7F6E\uFF0C\u91CD\u7F6ECMS\u6536\u96C6\u5668\u7684\u6570\u636E\u7ED3\u6784\u3002</li></ul><h3 id="\u7B80\u8FF0g1\u5783\u573E\u6536\u96C6\u5668" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0g1\u5783\u573E\u6536\u96C6\u5668" aria-hidden="true">#</a> \u7B80\u8FF0G1\u5783\u573E\u6536\u96C6\u5668</h3><p>\u548CSerial\u3001Parallel Scavenge\u3001CMS\u4E0D\u540C\uFF0CG1\u5783\u573E\u6536\u96C6\u5668\u628A\u5806\u5212\u5206\u6210\u591A\u4E2A\u5927\u5C0F\u76F8\u7B49\u7684\u72EC\u7ACB\u533A\u57DF\uFF08Region\uFF09\uFF0C\u65B0\u751F\u4EE3\u548C\u8001\u5E74\u4EE3\u4E0D\u518D\u7269\u7406\u9694\u79BB\u3002\u901A\u8FC7\u5F15\u5165 Region \u7684\u6982\u5FF5\uFF0C\u4ECE\u800C\u5C06\u539F\u6765\u7684\u4E00\u6574\u5757\u5185\u5B58\u7A7A\u95F4\u5212\u5206\u6210\u591A\u4E2A\u7684\u5C0F\u7A7A\u95F4\uFF0C\u4F7F\u5F97\u6BCF\u4E2A\u5C0F\u7A7A\u95F4\u53EF\u4EE5\u5355\u72EC\u8FDB\u884C\u5783\u573E\u56DE\u6536\u3002</p><ul><li>\u521D\u59CB\u6807\u8BB0\uFF1A\u6807\u8BB0\u4E0EGC roots\u76F4\u63A5\u5173\u8054\u7684\u5BF9\u8C61\u3002</li><li>\u5E76\u53D1\u6807\u8BB0\uFF1A\u53EF\u8FBE\u6027\u5206\u6790\u3002</li><li>\u6700\u7EC8\u6807\u8BB0\uFF1A\u5BF9\u5E76\u53D1\u6807\u8BB0\u8FC7\u7A0B\u4E2D\uFF0C\u7528\u6237\u7EBF\u7A0B\u4FEE\u6539\u7684\u5BF9\u8C61\u518D\u6B21\u6807\u8BB0\u4E00\u4E0B\u3002</li><li>\u7B5B\u9009\u56DE\u6536\uFF1A\u5BF9\u5404\u4E2ARegion\u7684\u56DE\u6536\u4EF7\u503C\u548C\u6210\u672C\u8FDB\u884C\u6392\u5E8F\uFF0C\u7136\u540E\u6839\u636E\u7528\u6237\u6240\u671F\u671B\u7684GC\u505C\u987F\u65F6\u95F4\u5236\u5B9A\u56DE\u6536\u8BA1\u5212\u5E76\u56DE\u6536\u3002</li></ul><h3 id="\u7B80\u8FF0minor-gc" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0minor-gc" aria-hidden="true">#</a> \u7B80\u8FF0Minor GC</h3><p>Minor GC\u6307\u53D1\u751F\u5728\u65B0\u751F\u4EE3\u7684\u5783\u573E\u6536\u96C6\uFF0C\u56E0\u4E3A Java \u5BF9\u8C61\u5927\u591A\u5B58\u6D3B\u65F6\u95F4\u77ED\uFF0C\u6240\u4EE5 Minor GC \u975E\u5E38\u9891\u7E41\uFF0C\u4E00\u822C\u56DE\u6536\u901F\u5EA6\u4E5F\u6BD4\u8F83\u5FEB\u3002</p><h3 id="\u7B80\u8FF0full-gc" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0full-gc" aria-hidden="true">#</a> \u7B80\u8FF0Full GC</h3><p>Full GC \u662F\u6E05\u7406\u6574\u4E2A\u5806\u7A7A\u95F4\u2014\u5305\u62EC\u5E74\u8F7B\u4EE3\u548C\u6C38\u4E45\u4EE3\u3002\u8C03\u7528System.gc(),\u8001\u5E74\u4EE3\u7A7A\u95F4\u4E0D\u8DB3\uFF0C\u7A7A\u95F4\u5206\u914D\u62C5\u4FDD\u5931\u8D25\uFF0C\u6C38\u751F\u4EE3\u7A7A\u95F4\u4E0D\u8DB3\u4F1A\u4EA7\u751Ffull gc\u3002</p><h3 id="\u5E38\u89C1\u5185\u5B58\u5206\u914D\u7B56\u7565" tabindex="-1"><a class="header-anchor" href="#\u5E38\u89C1\u5185\u5B58\u5206\u914D\u7B56\u7565" aria-hidden="true">#</a> \u5E38\u89C1\u5185\u5B58\u5206\u914D\u7B56\u7565</h3><p>\u5927\u591A\u6570\u60C5\u51B5\u4E0B\u5BF9\u8C61\u5728\u65B0\u751F\u4EE3 Eden \u533A\u5206\u914D\uFF0C\u5F53 Eden \u6CA1\u6709\u8DB3\u591F\u7A7A\u95F4\u65F6\u5C06\u53D1\u8D77\u4E00\u6B21 Minor GC\u3002</p><p>\u5927\u5BF9\u8C61\u9700\u8981\u5927\u91CF\u8FDE\u7EED\u5185\u5B58\u7A7A\u95F4\uFF0C\u76F4\u63A5\u8FDB\u5165\u8001\u5E74\u4EE3\u533A\u5206\u914D\u3002</p><p>\u5982\u679C\u7ECF\u5386\u8FC7\u7B2C\u4E00\u6B21 Minor GC \u4ECD\u7136\u5B58\u6D3B\u4E14\u80FD\u88AB Survivor \u5BB9\u7EB3\uFF0C\u8BE5\u5BF9\u8C61\u5C31\u4F1A\u88AB\u79FB\u52A8\u5230 Survivor \u4E2D\u5E76\u5C06\u5E74\u9F84\u8BBE\u7F6E\u4E3A 1\uFF0C\u5E76\u4E14\u6BCF\u71AC\u8FC7\u4E00\u6B21 Minor GC \u5E74\u9F84\u5C31\u52A0 1 \uFF0C\u5F53\u589E\u52A0\u5230\u4E00\u5B9A\u7A0B\u5EA6\uFF08\u9ED8\u8BA415\uFF09\u5C31\u4F1A\u88AB\u664B\u5347\u5230\u8001\u5E74\u4EE3\u3002</p><p>\u5982\u679C\u5728 Survivor \u4E2D\u76F8\u540C\u5E74\u9F84\u6240\u6709\u5BF9\u8C61\u5927\u5C0F\u7684\u603B\u548C\u5927\u4E8E Survivor \u7684\u4E00\u534A\uFF0C\u5E74\u9F84\u4E0D\u5C0F\u4E8E\u8BE5\u5E74\u9F84\u7684\u5BF9\u8C61\u5C31\u53EF\u4EE5\u76F4\u63A5\u8FDB\u5165\u8001\u5E74\u4EE3\u3002</p><p>MinorGC \u524D\uFF0C\u865A\u62DF\u673A\u5FC5\u987B\u68C0\u67E5\u8001\u5E74\u4EE3\u6700\u5927\u53EF\u7528\u8FDE\u7EED\u7A7A\u95F4\u662F\u5426\u5927\u4E8E\u65B0\u751F\u4EE3\u5BF9\u8C61\u603B\u7A7A\u95F4\uFF0C\u5982\u679C\u6EE1\u8DB3\u5219\u8BF4\u660E\u8FD9\u6B21 Minor GC \u786E\u5B9A\u5B89\u5168\u3002\u5982\u679C\u4E0D\uFF0CJVM\u4F1A\u67E5\u770BHandlePromotionFailure \u53C2\u6570\u662F\u5426\u5141\u8BB8\u62C5\u4FDD\u5931\u8D25\uFF0C\u5982\u679C\u5141\u8BB8\u4F1A\u7EE7\u7EED\u68C0\u67E5\u8001\u5E74\u4EE3\u6700\u5927\u53EF\u7528\u8FDE\u7EED\u7A7A\u95F4\u662F\u5426\u5927\u4E8E\u5386\u6B21\u664B\u5347\u8001\u5E74\u4EE3\u5BF9\u8C61\u7684\u5E73\u5747\u5927\u5C0F\uFF0C\u5982\u679C\u6EE1\u8DB3\u5C06Minor GC\uFF0C\u5426\u5219\u6539\u6210\u4E00\u6B21 FullGC\u3002</p><h3 id="\u7B80\u8FF0jvm\u7C7B\u52A0\u8F7D\u8FC7\u7A0B" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0jvm\u7C7B\u52A0\u8F7D\u8FC7\u7A0B" aria-hidden="true">#</a> \u7B80\u8FF0JVM\u7C7B\u52A0\u8F7D\u8FC7\u7A0B</h3><p>1\uFF09\u52A0\u8F7D\uFF1A</p><ul><li>\u901A\u8FC7\u5168\u7C7B\u540D\u83B7\u53D6\u7C7B\u7684\u4E8C\u8FDB\u5236\u5B57\u8282\u6D41\u3002</li><li>\u5C06\u7C7B\u7684\u9759\u6001\u5B58\u50A8\u7ED3\u6784\u8F6C\u5316\u4E3A\u65B9\u6CD5\u533A\u7684\u8FD0\u884C\u65F6\u6570\u636E\u7ED3\u6784\u3002</li><li>\u5728\u5185\u5B58\u4E2D\u751F\u6210\u7C7B\u7684Class\u5BF9\u8C61\uFF0C\u4F5C\u4E3A\u65B9\u6CD5\u533A\u6570\u636E\u7684\u5165\u53E3\u3002</li></ul><p>2\uFF09\u9A8C\u8BC1\uFF1A\u5BF9\u6587\u4EF6\u683C\u5F0F\uFF0C\u5143\u6570\u636E\uFF0C\u5B57\u8282\u7801\uFF0C\u7B26\u53F7\u5F15\u7528\u7B49\u9A8C\u8BC1\u6B63\u786E\u6027\u3002</p><p>3\uFF09\u51C6\u5907\uFF1A\u5728\u65B9\u6CD5\u533A\u5185\u4E3A\u7C7B\u53D8\u91CF\u5206\u914D\u5185\u5B58\u5E76\u8BBE\u7F6E\u4E3A0\u503C\u3002</p><p>4\uFF09\u89E3\u6790\uFF1A\u5C06\u7B26\u53F7\u5F15\u7528\u8F6C\u5316\u4E3A\u76F4\u63A5\u5F15\u7528\u3002</p><p>5\uFF09\u521D\u59CB\u5316\uFF1A\u6267\u884C\u7C7B\u6784\u9020\u5668clinit\u65B9\u6CD5\uFF0C\u771F\u6B63\u521D\u59CB\u5316\u3002</p><h3 id="\u7B80\u8FF0jvm\u4E2D\u7684\u7C7B\u52A0\u8F7D\u5668" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0jvm\u4E2D\u7684\u7C7B\u52A0\u8F7D\u5668" aria-hidden="true">#</a> \u7B80\u8FF0JVM\u4E2D\u7684\u7C7B\u52A0\u8F7D\u5668</h3><ul><li>BootstrapClassLoader\u542F\u52A8\u7C7B\u52A0\u8F7D\u5668\uFF1A\u52A0\u8F7D/lib\u4E0B\u7684jar\u5305\u548C\u7C7B\u3002 \u7531C++\u7F16\u5199\u3002</li><li>ExtensionClassLoader\u6269\u5C55\u7C7B\u52A0\u8F7D\u5668\uFF1A /lib/ext\u76EE\u5F55\u4E0B\u7684jar\u5305\u548C\u7C7B\u3002\u7531Java\u7F16\u5199\u3002</li><li>AppClassLoader\u5E94\u7528\u7C7B\u52A0\u8F7D\u5668\uFF0C\u52A0\u8F7D\u5F53\u524DclassPath\u4E0B\u7684jar\u5305\u548C\u7C7B\u3002\u7531Java\u7F16\u5199\u3002</li></ul><h3 id="\u7B80\u8FF0\u53CC\u4EB2\u59D4\u6D3E\u673A\u5236" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0\u53CC\u4EB2\u59D4\u6D3E\u673A\u5236" aria-hidden="true">#</a> \u7B80\u8FF0\u53CC\u4EB2\u59D4\u6D3E\u673A\u5236</h3><p>\u4E00\u4E2A\u7C7B\u52A0\u8F7D\u5668\u6536\u5230\u7C7B\u52A0\u8F7D\u8BF7\u6C42\u4E4B\u540E\uFF0C\u9996\u5148\u5224\u65AD\u5F53\u524D\u7C7B\u662F\u5426\u88AB\u52A0\u8F7D\u8FC7\u3002\u5DF2\u7ECF\u88AB\u52A0\u8F7D\u7684\u7C7B\u4F1A\u76F4\u63A5\u8FD4\u56DE\uFF0C\u5982\u679C\u6CA1\u6709\u88AB\u52A0\u8F7D\uFF0C\u9996\u5148\u5C06\u7C7B\u52A0\u8F7D\u8BF7\u6C42\u8F6C\u53D1\u7ED9\u7236\u7C7B\u52A0\u8F7D\u5668\uFF0C\u4E00\u76F4\u8F6C\u53D1\u5230\u542F\u52A8\u7C7B\u52A0\u8F7D\u5668\uFF0C\u53EA\u6709\u5F53\u7236\u7C7B\u52A0\u8F7D\u5668\u65E0\u6CD5\u5B8C\u6210\u65F6\u624D\u5C1D\u8BD5\u81EA\u5DF1\u52A0\u8F7D\u3002</p><p>\u52A0\u8F7D\u7C7B\u987A\u5E8F\uFF1ABootstrapClassLoader-&gt;ExtensionClassLoader-&gt;AppClassLoader-&gt;CustomClassLoader \u68C0\u67E5\u7C7B\u662F\u5426\u52A0\u8F7D\u987A\u5E8F\uFF1A CustomClassLoader-&gt;AppClassLoader-&gt;ExtensionClassLoader-&gt;BootstrapClassLoader</p><h3 id="\u53CC\u4EB2\u59D4\u6D3E\u673A\u5236\u7684\u4F18\u70B9" tabindex="-1"><a class="header-anchor" href="#\u53CC\u4EB2\u59D4\u6D3E\u673A\u5236\u7684\u4F18\u70B9" aria-hidden="true">#</a> \u53CC\u4EB2\u59D4\u6D3E\u673A\u5236\u7684\u4F18\u70B9</h3><ul><li>\u907F\u514D\u7C7B\u7684\u91CD\u590D\u52A0\u8F7D\u3002\u76F8\u540C\u7684\u7C7B\u88AB\u4E0D\u540C\u7684\u7C7B\u52A0\u8F7D\u5668\u52A0\u8F7D\u4F1A\u4EA7\u751F\u4E0D\u540C\u7684\u7C7B\uFF0C\u53CC\u4EB2\u59D4\u6D3E\u4FDD\u8BC1\u4E86Java\u7A0B\u5E8F\u7684\u7A33\u5B9A\u8FD0\u884C\u3002</li><li>\u4FDD\u8BC1\u6838\u5FC3API\u4E0D\u88AB\u4FEE\u6539\u3002</li><li>\u5982\u4F55\u7834\u574F\u53CC\u4EB2\u59D4\u6D3E\u673A\u5236</li><li>\u91CD\u8F7DloadClass()\u65B9\u6CD5\uFF0C\u5373\u81EA\u5B9A\u4E49\u7C7B\u52A0\u8F7D\u5668\u3002</li></ul><h3 id="\u5982\u4F55\u6784\u5EFA\u81EA\u5B9A\u4E49\u7C7B\u52A0\u8F7D\u5668" tabindex="-1"><a class="header-anchor" href="#\u5982\u4F55\u6784\u5EFA\u81EA\u5B9A\u4E49\u7C7B\u52A0\u8F7D\u5668" aria-hidden="true">#</a> \u5982\u4F55\u6784\u5EFA\u81EA\u5B9A\u4E49\u7C7B\u52A0\u8F7D\u5668</h3><p>\u65B0\u5EFA\u81EA\u5B9A\u4E49\u7C7B\u7EE7\u627F\u81EAjava.lang.ClassLoader\uFF0C\u91CD\u5199findClass\u3001loadClass\u3001defineClass\u65B9\u6CD5</p><h3 id="jvm\u5E38\u89C1\u8C03\u4F18\u53C2\u6570" tabindex="-1"><a class="header-anchor" href="#jvm\u5E38\u89C1\u8C03\u4F18\u53C2\u6570" aria-hidden="true">#</a> JVM\u5E38\u89C1\u8C03\u4F18\u53C2\u6570</h3><ul><li>-Xms \u521D\u59CB\u5806\u5927\u5C0F</li><li>-Xmx \u6700\u5927\u5806\u5927\u5C0F</li><li>-XX:NewSize \u5E74\u8F7B\u4EE3\u5927\u5C0F</li><li>-XX:MaxNewSize \u5E74\u8F7B\u4EE3\u6700\u5927\u503C</li><li>-XX:PermSize \u6C38\u751F\u4EE3\u521D\u59CB\u503C</li><li>-XX:MaxPermSize \u6C38\u751F\u4EE3\u6700\u5927\u503C</li><li>-XX:NewRatio \u65B0\u751F\u4EE3\u4E0E\u8001\u5E74\u4EE3\u7684\u6BD4\u4F8B</li></ul><hr>',97),p=e("\u6295\u7A3F\u4F5C\u8005\uFF1A\u540E\u7AEF\u6280\u672F\u5C0F\u725B\u8BF4 \u8F6C\u8F7D\u94FE\u63A5\uFF1A"),c={href:"https://mp.weixin.qq.com/s/PmeH38qWVxyIhBpsAsjG7w",target:"_blank",rel:"noopener noreferrer"},u=e("https://mp.weixin.qq.com/s/PmeH38qWVxyIhBpsAsjG7w"),v=a("p",null,[a("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png",alt:""})],-1);function f(m,C){const r=l("ExternalLinkIcon");return h(),d("div",null,[s,a("p",null,[p,a("a",c,[u,n(r)])]),v])}var J=i(o,[["render",f],["__file","jvm.html.vue"]]);export{J as default};
+import{_ as i}from"./plugin-vue_export-helper.21dcd24c.js";import{r as l,o as h,c as d,a,b as n,e as t,d as e}from"./app.615e41d8.js";const o={},s=t('<h1 id="java-\u865A\u62DF\u673A\u516B\u80A1\u6587-\u80CC\u8BF5\u7248-\u5FC5\u770B" tabindex="-1"><a class="header-anchor" href="#java-\u865A\u62DF\u673A\u516B\u80A1\u6587-\u80CC\u8BF5\u7248-\u5FC5\u770B" aria-hidden="true">#</a> Java \u865A\u62DF\u673A\u516B\u80A1\u6587\uFF08\u80CC\u8BF5\u7248\uFF09\u5FC5\u770B\u{1F44D}</h1><h3 id="\u7B80\u8FF0jvm\u5185\u5B58\u6A21\u578B" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0jvm\u5185\u5B58\u6A21\u578B" aria-hidden="true">#</a> \u7B80\u8FF0JVM\u5185\u5B58\u6A21\u578B</h3><p>\u7EBF\u7A0B\u79C1\u6709\u7684\u8FD0\u884C\u65F6\u6570\u636E\u533A: \u7A0B\u5E8F\u8BA1\u6570\u5668\u3001Java \u865A\u62DF\u673A\u6808\u3001\u672C\u5730\u65B9\u6CD5\u6808\u3002</p><p>\u7EBF\u7A0B\u5171\u4EAB\u7684\u8FD0\u884C\u65F6\u6570\u636E\u533A\uFF1AJava \u5806\u3001\u65B9\u6CD5\u533A\u3002</p><h3 id="\u7B80\u8FF0\u7A0B\u5E8F\u8BA1\u6570\u5668" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0\u7A0B\u5E8F\u8BA1\u6570\u5668" aria-hidden="true">#</a> \u7B80\u8FF0\u7A0B\u5E8F\u8BA1\u6570\u5668</h3><p>\u7A0B\u5E8F\u8BA1\u6570\u5668\u8868\u793A\u5F53\u524D\u7EBF\u7A0B\u6240\u6267\u884C\u7684\u5B57\u8282\u7801\u7684\u884C\u53F7\u6307\u793A\u5668\u3002</p><p>\u7A0B\u5E8F\u8BA1\u6570\u5668\u4E0D\u4F1A\u4EA7\u751FStackOverflowError\u548COutOfMemoryError\u3002</p><h3 id="\u7B80\u8FF0\u865A\u62DF\u673A\u6808" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0\u865A\u62DF\u673A\u6808" aria-hidden="true">#</a> \u7B80\u8FF0\u865A\u62DF\u673A\u6808</h3><p>Java \u865A\u62DF\u673A\u6808\u7528\u6765\u63CF\u8FF0 Java \u65B9\u6CD5\u6267\u884C\u7684\u5185\u5B58\u6A21\u578B\u3002\u7EBF\u7A0B\u521B\u5EFA\u65F6\u5C31\u4F1A\u5206\u914D\u4E00\u4E2A\u6808\u7A7A\u95F4\uFF0C\u7EBF\u7A0B\u7ED3\u675F\u540E\u6808\u7A7A\u95F4\u88AB\u56DE\u6536\u3002</p><p>\u6808\u4E2D\u5143\u7D20\u7528\u4E8E\u652F\u6301\u865A\u62DF\u673A\u8FDB\u884C\u65B9\u6CD5\u8C03\u7528\uFF0C\u6BCF\u4E2A\u65B9\u6CD5\u5728\u6267\u884C\u65F6\u90FD\u4F1A\u521B\u5EFA\u4E00\u4E2A\u6808\u5E27\u5B58\u50A8\u65B9\u6CD5\u7684\u5C40\u90E8\u53D8\u91CF\u8868\u3001\u64CD\u4F5C\u6808\u3001\u52A8\u6001\u94FE\u63A5\u548C\u8FD4\u56DE\u5730\u5740\u7B49\u4FE1\u606F\u3002</p><p>\u865A\u62DF\u673A\u6808\u4F1A\u4EA7\u751F\u4E24\u7C7B\u5F02\u5E38\uFF1A</p><ul><li>StackOverflowError\uFF1A\u7EBF\u7A0B\u8BF7\u6C42\u7684\u6808\u6DF1\u5EA6\u5927\u4E8E\u865A\u62DF\u673A\u5141\u8BB8\u7684\u6DF1\u5EA6\u629B\u51FA\u3002</li><li>OutOfMemoryError\uFF1A\u5982\u679C JVM \u6808\u5BB9\u91CF\u53EF\u4EE5\u52A8\u6001\u6269\u5C55\uFF0C\u865A\u62DF\u673A\u6808\u5360\u7528\u5185\u5B58\u8D85\u51FA\u629B\u51FA\u3002</li></ul><h3 id="\u7B80\u8FF0\u672C\u5730\u65B9\u6CD5\u6808" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0\u672C\u5730\u65B9\u6CD5\u6808" aria-hidden="true">#</a> \u7B80\u8FF0\u672C\u5730\u65B9\u6CD5\u6808</h3><p>\u672C\u5730\u65B9\u6CD5\u6808\u4E0E\u865A\u62DF\u673A\u6808\u4F5C\u7528\u76F8\u4F3C\uFF0C\u4E0D\u540C\u7684\u662F\u865A\u62DF\u673A\u6808\u4E3A\u865A\u62DF\u673A\u6267\u884C Java \u65B9\u6CD5\u670D\u52A1\uFF0C\u672C\u5730\u65B9\u6CD5\u6808\u4E3A\u672C\u5730\u65B9\u6CD5\u670D\u52A1\u3002\u53EF\u4EE5\u5C06\u865A\u62DF\u673A\u6808\u770B\u4F5C\u666E\u901A\u7684java\u51FD\u6570\u5BF9\u5E94\u7684\u5185\u5B58\u6A21\u578B\uFF0C\u672C\u5730\u65B9\u6CD5\u6808\u770B\u4F5C\u7531native\u5173\u952E\u8BCD\u4FEE\u9970\u7684\u51FD\u6570\u5BF9\u5E94\u7684\u5185\u5B58\u6A21\u578B\u3002</p><p>\u672C\u5730\u65B9\u6CD5\u6808\u4F1A\u4EA7\u751F\u4E24\u7C7B\u5F02\u5E38\uFF1A</p><ul><li>StackOverflowError\uFF1A\u7EBF\u7A0B\u8BF7\u6C42\u7684\u6808\u6DF1\u5EA6\u5927\u4E8E\u865A\u62DF\u673A\u5141\u8BB8\u7684\u6DF1\u5EA6\u629B\u51FA\u3002</li><li>OutOfMemoryError\uFF1A\u5982\u679C JVM \u6808\u5BB9\u91CF\u53EF\u4EE5\u52A8\u6001\u6269\u5C55\uFF0C\u865A\u62DF\u673A\u6808\u5360\u7528\u5185\u5B58\u8D85\u51FA\u629B\u51FA\u3002</li></ul><h3 id="\u7B80\u8FF0jvm\u4E2D\u7684\u5806" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0jvm\u4E2D\u7684\u5806" aria-hidden="true">#</a> \u7B80\u8FF0JVM\u4E2D\u7684\u5806</h3><p>\u5806\u4E3B\u8981\u4F5C\u7528\u662F\u5B58\u653E\u5BF9\u8C61\u5B9E\u4F8B\uFF0CJava \u91CC\u51E0\u4E4E\u6240\u6709\u5BF9\u8C61\u5B9E\u4F8B\u90FD\u5728\u5806\u4E0A\u5206\u914D\u5185\u5B58\uFF0C\u5806\u4E5F\u662F\u5185\u5B58\u7BA1\u7406\u4E2D\u6700\u5927\u7684\u4E00\u5757\u3002Java\u7684\u5783\u573E\u56DE\u6536\u4E3B\u8981\u5C31\u662F\u9488\u5BF9\u5806\u8FD9\u4E00\u533A\u57DF\u8FDB\u884C\u3002 \u53EF\u901A\u8FC7 -Xms \u548C -Xmx \u8BBE\u7F6E\u5806\u7684\u6700\u5C0F\u548C\u6700\u5927\u5BB9\u91CF\u3002</p><p>\u5806\u4F1A\u629B\u51FA OutOfMemoryError\u5F02\u5E38\u3002</p><h3 id="\u7B80\u8FF0\u65B9\u6CD5\u533A" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0\u65B9\u6CD5\u533A" aria-hidden="true">#</a> \u7B80\u8FF0\u65B9\u6CD5\u533A</h3><p>\u65B9\u6CD5\u533A\u7528\u4E8E\u5B58\u50A8\u88AB\u865A\u62DF\u673A\u52A0\u8F7D\u7684\u7C7B\u4FE1\u606F\u3001\u5E38\u91CF\u3001\u9759\u6001\u53D8\u91CF\u7B49\u6570\u636E\u3002</p><p>JDK6\u4E4B\u524D\u4F7F\u7528\u6C38\u4E45\u4EE3\u5B9E\u73B0\u65B9\u6CD5\u533A\uFF0C\u5BB9\u6613\u5185\u5B58\u6EA2\u51FA\u3002JDK7 \u628A\u653E\u5728\u6C38\u4E45\u4EE3\u7684\u5B57\u7B26\u4E32\u5E38\u91CF\u6C60\u3001\u9759\u6001\u53D8\u91CF\u7B49\u79FB\u51FA\uFF0CJDK8 \u4E2D\u629B\u5F03\u6C38\u4E45\u4EE3\uFF0C\u6539\u7528\u5728\u672C\u5730\u5185\u5B58\u4E2D\u5B9E\u73B0\u7684\u5143\u7A7A\u95F4\u6765\u5B9E\u73B0\u65B9\u6CD5\u533A\uFF0C\u628A JDK 7 \u4E2D\u6C38\u4E45\u4EE3\u5185\u5BB9\u79FB\u5230\u5143\u7A7A\u95F4\u3002</p><p>\u65B9\u6CD5\u533A\u4F1A\u629B\u51FA OutOfMemoryError\u5F02\u5E38\u3002</p><h3 id="\u7B80\u8FF0\u8FD0\u884C\u65F6\u5E38\u91CF\u6C60" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0\u8FD0\u884C\u65F6\u5E38\u91CF\u6C60" aria-hidden="true">#</a> \u7B80\u8FF0\u8FD0\u884C\u65F6\u5E38\u91CF\u6C60</h3><p>\u8FD0\u884C\u65F6\u5E38\u91CF\u6C60\u5B58\u653E\u5E38\u91CF\u6C60\u8868\uFF0C\u7528\u4E8E\u5B58\u653E\u7F16\u8BD1\u5668\u751F\u6210\u7684\u5404\u79CD\u5B57\u9762\u91CF\u4E0E\u7B26\u53F7\u5F15\u7528\u3002\u4E00\u822C\u9664\u4E86\u4FDD\u5B58 Class \u6587\u4EF6\u4E2D\u63CF\u8FF0\u7684\u7B26\u53F7\u5F15\u7528\u5916\uFF0C\u8FD8\u4F1A\u628A\u7B26\u53F7\u5F15\u7528\u7FFB\u8BD1\u7684\u76F4\u63A5\u5F15\u7528\u4E5F\u5B58\u50A8\u5728\u8FD0\u884C\u65F6\u5E38\u91CF\u6C60\u3002\u9664\u6B64\u4E4B\u5916\uFF0C\u4E5F\u4F1A\u5B58\u653E\u5B57\u7B26\u4E32\u57FA\u672C\u7C7B\u578B\u3002</p><p>JDK8\u4E4B\u524D\uFF0C\u653E\u5728\u65B9\u6CD5\u533A\uFF0C\u5927\u5C0F\u53D7\u9650\u4E8E\u65B9\u6CD5\u533A\u3002JDK8\u5C06\u8FD0\u884C\u65F6\u5E38\u91CF\u6C60\u5B58\u653E\u5806\u4E2D\u3002</p><h3 id="\u7B80\u8FF0\u76F4\u63A5\u5185\u5B58" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0\u76F4\u63A5\u5185\u5B58" aria-hidden="true">#</a> \u7B80\u8FF0\u76F4\u63A5\u5185\u5B58</h3><p>\u76F4\u63A5\u5185\u5B58\u4E5F\u79F0\u4E3A\u5806\u5916\u5185\u5B58\uFF0C\u5C31\u662F\u628A\u5185\u5B58\u5BF9\u8C61\u5206\u914D\u5728JVM\u5806\u5916\u7684\u5185\u5B58\u533A\u57DF\u3002\u8FD9\u90E8\u5206\u5185\u5B58\u4E0D\u662F\u865A\u62DF\u673A\u7BA1\u7406\uFF0C\u800C\u662F\u7531\u64CD\u4F5C\u7CFB\u7EDF\u6765\u7BA1\u7406\u3002 Java\u901A\u8FC7DriectByteBuffer\u5BF9\u5176\u8FDB\u884C\u64CD\u4F5C\uFF0C\u907F\u514D\u4E86\u5728 Java \u5806\u548C Native\u5806\u6765\u56DE\u590D\u5236\u6570\u636E\u3002</p><h3 id="\u7B80\u8FF0java\u521B\u5EFA\u5BF9\u8C61\u7684\u8FC7\u7A0B" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0java\u521B\u5EFA\u5BF9\u8C61\u7684\u8FC7\u7A0B" aria-hidden="true">#</a> \u7B80\u8FF0Java\u521B\u5EFA\u5BF9\u8C61\u7684\u8FC7\u7A0B</h3><ul><li>\u68C0\u67E5\u8BE5\u6307\u4EE4\u7684\u53C2\u6570\u80FD\u5426\u5728\u5E38\u91CF\u6C60\u4E2D\u5B9A\u4F4D\u5230\u4E00\u4E2A\u7C7B\u7684\u7B26\u53F7\u5F15\u7528\uFF0C\u5E76\u68C0\u67E5\u5F15\u7528\u4EE3\u8868\u7684\u7C7B\u662F\u5426\u5DF2\u88AB\u52A0\u8F7D\u3001\u89E3\u6790\u548C\u521D\u59CB\u5316\uFF0C\u5982\u679C\u6CA1\u6709\u5C31\u5148\u6267\u884C\u7C7B\u52A0\u8F7D\u3002</li><li>\u901A\u8FC7\u68C0\u67E5\u901A\u8FC7\u540E\u865A\u62DF\u673A\u5C06\u4E3A\u65B0\u751F\u5BF9\u8C61\u5206\u914D\u5185\u5B58\u3002</li><li>\u5B8C\u6210\u5185\u5B58\u5206\u914D\u540E\u865A\u62DF\u673A\u5C06\u6210\u5458\u53D8\u91CF\u8BBE\u4E3A\u96F6\u503C</li><li>\u8BBE\u7F6E\u5BF9\u8C61\u5934\uFF0C\u5305\u62EC\u54C8\u5E0C\u7801\u3001GC \u4FE1\u606F\u3001\u9501\u4FE1\u606F\u3001\u5BF9\u8C61\u6240\u5C5E\u7C7B\u7684\u7C7B\u5143\u4FE1\u606F\u7B49\u3002</li><li>\u6267\u884C init \u65B9\u6CD5\uFF0C\u521D\u59CB\u5316\u6210\u5458\u53D8\u91CF\uFF0C\u6267\u884C\u5B9E\u4F8B\u5316\u4EE3\u7801\u5757\uFF0C\u8C03\u7528\u7C7B\u7684\u6784\u9020\u65B9\u6CD5\uFF0C\u5E76\u628A\u5806\u5185\u5BF9\u8C61\u7684\u9996\u5730\u5740\u8D4B\u503C\u7ED9\u5F15\u7528\u53D8\u91CF\u3002</li></ul><h3 id="\u7B80\u8FF0jvm\u7ED9\u5BF9\u8C61\u5206\u914D\u5185\u5B58\u7684\u7B56\u7565" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0jvm\u7ED9\u5BF9\u8C61\u5206\u914D\u5185\u5B58\u7684\u7B56\u7565" aria-hidden="true">#</a> \u7B80\u8FF0JVM\u7ED9\u5BF9\u8C61\u5206\u914D\u5185\u5B58\u7684\u7B56\u7565</h3><ul><li>\u6307\u9488\u78B0\u649E\uFF1A\u8FD9\u79CD\u65B9\u5F0F\u5728\u5185\u5B58\u4E2D\u653E\u4E00\u4E2A\u6307\u9488\u4F5C\u4E3A\u5206\u754C\u6307\u793A\u5668\u5C06\u4F7F\u7528\u8FC7\u7684\u5185\u5B58\u653E\u5728\u4E00\u8FB9\uFF0C\u7A7A\u95F2\u7684\u653E\u5728\u53E6\u4E00\u8FB9\uFF0C\u901A\u8FC7\u6307\u9488\u632A\u52A8\u5B8C\u6210\u5206\u914D\u3002</li><li>\u7A7A\u95F2\u5217\u8868\uFF1A\u5BF9\u4E8E Java \u5806\u5185\u5B58\u4E0D\u89C4\u6574\u7684\u60C5\u51B5\uFF0C\u865A\u62DF\u673A\u5FC5\u987B\u7EF4\u62A4\u4E00\u4E2A\u5217\u8868\u8BB0\u5F55\u54EA\u4E9B\u5185\u5B58\u53EF\u7528\uFF0C\u5728\u5206\u914D\u65F6\u4ECE\u5217\u8868\u4E2D\u627E\u5230\u4E00\u5757\u8DB3\u591F\u5927\u7684\u7A7A\u95F4\u5212\u5206\u7ED9\u5BF9\u8C61\u5E76\u66F4\u65B0\u5217\u8868\u8BB0\u5F55\u3002</li></ul><h3 id="java\u5BF9\u8C61\u5185\u5B58\u5206\u914D\u662F\u5982\u4F55\u4FDD\u8BC1\u7EBF\u7A0B\u5B89\u5168\u7684" tabindex="-1"><a class="header-anchor" href="#java\u5BF9\u8C61\u5185\u5B58\u5206\u914D\u662F\u5982\u4F55\u4FDD\u8BC1\u7EBF\u7A0B\u5B89\u5168\u7684" aria-hidden="true">#</a> Java\u5BF9\u8C61\u5185\u5B58\u5206\u914D\u662F\u5982\u4F55\u4FDD\u8BC1\u7EBF\u7A0B\u5B89\u5168\u7684</h3><p>\u7B2C\u4E00\u79CD\u65B9\u6CD5\uFF0C\u91C7\u7528CAS\u673A\u5236\uFF0C\u914D\u5408\u5931\u8D25\u91CD\u8BD5\u7684\u65B9\u5F0F\u4FDD\u8BC1\u66F4\u65B0\u64CD\u4F5C\u7684\u539F\u5B50\u6027\u3002\u8BE5\u65B9\u5F0F\u6548\u7387\u4F4E\u3002</p><p>\u7B2C\u4E8C\u79CD\u65B9\u6CD5\uFF0C\u6BCF\u4E2A\u7EBF\u7A0B\u5728Java\u5806\u4E2D\u9884\u5148\u5206\u914D\u4E00\u5C0F\u5757\u5185\u5B58\uFF0C\u7136\u540E\u518D\u7ED9\u5BF9\u8C61\u5206\u914D\u5185\u5B58\u7684\u65F6\u5019\uFF0C\u76F4\u63A5\u5728\u81EA\u5DF1\u8FD9\u5757&quot;\u79C1\u6709&quot;\u5185\u5B58\u4E2D\u5206\u914D\u3002\u4E00\u822C\u91C7\u7528\u8FD9\u79CD\u7B56\u7565\u3002</p><h3 id="\u7B80\u8FF0\u5BF9\u8C61\u7684\u5185\u5B58\u5E03\u5C40" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0\u5BF9\u8C61\u7684\u5185\u5B58\u5E03\u5C40" aria-hidden="true">#</a> \u7B80\u8FF0\u5BF9\u8C61\u7684\u5185\u5B58\u5E03\u5C40</h3><p>\u5BF9\u8C61\u5728\u5806\u5185\u5B58\u7684\u5B58\u50A8\u5E03\u5C40\u53EF\u5206\u4E3A\u5BF9\u8C61\u5934\u3001\u5B9E\u4F8B\u6570\u636E\u548C\u5BF9\u9F50\u586B\u5145\u3002</p><p>1\uFF09\u5BF9\u8C61\u5934\u4E3B\u8981\u5305\u542B\u4E24\u90E8\u5206\u6570\u636E\uFF1A MarkWord\u3001\u7C7B\u578B\u6307\u9488\u3002</p><p>MarkWord \u7528\u4E8E\u5B58\u50A8\u54C8\u5E0C\u7801\uFF08HashCode\uFF09\u3001GC\u5206\u4EE3\u5E74\u9F84\u3001\u9501\u72B6\u6001\u6807\u5FD7\u4F4D\u3001\u7EBF\u7A0B\u6301\u6709\u7684\u9501\u3001\u504F\u5411\u7EBF\u7A0BID\u7B49\u4FE1\u606F\u3002</p><p>\u7C7B\u578B\u6307\u9488\u5373\u5BF9\u8C61\u6307\u5411\u4ED6\u7684\u7C7B\u5143\u6570\u636E\u6307\u9488\uFF0C\u5982\u679C\u5BF9\u8C61\u662F\u4E00\u4E2A Java \u6570\u7EC4\uFF0C\u4F1A\u6709\u4E00\u5757\u7528\u4E8E\u8BB0\u5F55\u6570\u7EC4\u957F\u5EA6\u7684\u6570\u636E\u3002</p><p>2\uFF09\u5B9E\u4F8B\u6570\u636E\u5B58\u50A8\u4EE3\u7801\u4E2D\u6240\u5B9A\u4E49\u7684\u5404\u79CD\u7C7B\u578B\u7684\u5B57\u6BB5\u4FE1\u606F\u3002</p><p>3\uFF09\u5BF9\u9F50\u586B\u5145\u8D77\u5360\u4F4D\u4F5C\u7528\u3002HotSpot \u865A\u62DF\u673A\u8981\u6C42\u5BF9\u8C61\u7684\u8D77\u59CB\u5730\u5740\u5FC5\u987B\u662F8\u7684\u6574\u6570\u500D\uFF0C\u56E0\u6B64\u9700\u8981\u5BF9\u9F50\u586B\u5145\u3002</p><h3 id="\u5982\u4F55\u5224\u65AD\u5BF9\u8C61\u662F\u5426\u662F\u5783\u573E" tabindex="-1"><a class="header-anchor" href="#\u5982\u4F55\u5224\u65AD\u5BF9\u8C61\u662F\u5426\u662F\u5783\u573E" aria-hidden="true">#</a> \u5982\u4F55\u5224\u65AD\u5BF9\u8C61\u662F\u5426\u662F\u5783\u573E</h3><p>1\uFF09\u5F15\u7528\u8BA1\u6570\u6CD5\uFF1A</p><p>\u8BBE\u7F6E\u5F15\u7528\u8BA1\u6570\u5668\uFF0C\u5BF9\u8C61\u88AB\u5F15\u7528\u8BA1\u6570\u5668\u52A0 1\uFF0C\u5F15\u7528\u5931\u6548\u65F6\u8BA1\u6570\u5668\u51CF 1\uFF0C\u5982\u679C\u8BA1\u6570\u5668\u4E3A 0 \u5219\u88AB\u6807\u8BB0\u4E3A\u5783\u573E\u3002\u4F1A\u5B58\u5728\u5BF9\u8C61\u95F4\u5FAA\u73AF\u5F15\u7528\u7684\u95EE\u9898\uFF0C\u4E00\u822C\u4E0D\u4F7F\u7528\u8FD9\u79CD\u65B9\u6CD5\u3002</p><p>2\uFF09\u53EF\u8FBE\u6027\u5206\u6790\uFF1A</p><p>\u901A\u8FC7 GC Roots \u7684\u6839\u5BF9\u8C61\u4F5C\u4E3A\u8D77\u59CB\u8282\u70B9\uFF0C\u4ECE\u8FD9\u4E9B\u8282\u70B9\u5F00\u59CB\uFF0C\u6839\u636E\u5F15\u7528\u5173\u7CFB\u5411\u4E0B\u641C\u7D22\uFF0C\u5982\u679C\u67D0\u4E2A\u5BF9\u8C61\u6CA1\u6709\u88AB\u641C\u5230\uFF0C\u5219\u4F1A\u88AB\u6807\u8BB0\u4E3A\u5783\u573E\u3002\u53EF\u4F5C\u4E3A GC Roots \u7684\u5BF9\u8C61\u5305\u62EC\u865A\u62DF\u673A\u6808\u548C\u672C\u5730\u65B9\u6CD5\u6808\u4E2D\u5F15\u7528\u7684\u5BF9\u8C61\u3001\u7C7B\u9759\u6001\u5C5E\u6027\u5F15\u7528\u7684\u5BF9\u8C61\u3001\u5E38\u91CF\u5F15\u7528\u7684\u5BF9\u8C61\u3002</p><h3 id="\u7B80\u8FF0java\u7684\u5F15\u7528\u7C7B\u578B" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0java\u7684\u5F15\u7528\u7C7B\u578B" aria-hidden="true">#</a> \u7B80\u8FF0java\u7684\u5F15\u7528\u7C7B\u578B</h3><ul><li>\u5F3A\u5F15\u7528\uFF1A \u88AB\u5F3A\u5F15\u7528\u5173\u8054\u7684\u5BF9\u8C61\u4E0D\u4F1A\u88AB\u56DE\u6536\u3002\u4E00\u822C\u91C7\u7528 new \u65B9\u6CD5\u521B\u5EFA\u5F3A\u5F15\u7528\u3002</li><li>\u8F6F\u5F15\u7528\uFF1A\u88AB\u8F6F\u5F15\u7528\u5173\u8054\u7684\u5BF9\u8C61\u53EA\u6709\u5728\u5185\u5B58\u4E0D\u591F\u7684\u60C5\u51B5\u4E0B\u624D\u4F1A\u88AB\u56DE\u6536\u3002\u4E00\u822C\u91C7\u7528 SoftReference \u7C7B\u6765\u521B\u5EFA\u8F6F\u5F15\u7528\u3002</li><li>\u5F31\u5F15\u7528\uFF1A\u5783\u573E\u6536\u96C6\u5668\u78B0\u5230\u5373\u56DE\u6536\uFF0C\u4E5F\u5C31\u662F\u8BF4\u5B83\u53EA\u80FD\u5B58\u6D3B\u5230\u4E0B\u4E00\u6B21\u5783\u573E\u56DE\u6536\u53D1\u751F\u4E4B\u524D\u3002\u4E00\u822C\u91C7\u7528 WeakReference \u7C7B\u6765\u521B\u5EFA\u5F31\u5F15\u7528\u3002</li><li>\u865A\u5F15\u7528\uFF1A \u65E0\u6CD5\u901A\u8FC7\u8BE5\u5F15\u7528\u83B7\u53D6\u5BF9\u8C61\u3002\u552F\u4E00\u76EE\u7684\u5C31\u662F\u4E3A\u4E86\u80FD\u5728\u5BF9\u8C61\u88AB\u56DE\u6536\u65F6\u6536\u5230\u4E00\u4E2A\u7CFB\u7EDF\u901A\u77E5\u3002\u865A\u5F15\u7528\u5FC5\u987B\u4E0E\u5F15\u7528\u961F\u5217\u8054\u5408\u4F7F\u7528\u3002</li></ul><h3 id="\u7B80\u8FF0\u6807\u8BB0\u6E05\u9664\u7B97\u6CD5\u3001\u6807\u8BB0\u6574\u7406\u7B97\u6CD5\u548C\u6807\u8BB0\u590D\u5236\u7B97\u6CD5" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0\u6807\u8BB0\u6E05\u9664\u7B97\u6CD5\u3001\u6807\u8BB0\u6574\u7406\u7B97\u6CD5\u548C\u6807\u8BB0\u590D\u5236\u7B97\u6CD5" aria-hidden="true">#</a> \u7B80\u8FF0\u6807\u8BB0\u6E05\u9664\u7B97\u6CD5\u3001\u6807\u8BB0\u6574\u7406\u7B97\u6CD5\u548C\u6807\u8BB0\u590D\u5236\u7B97\u6CD5</h3><ul><li>\u6807\u8BB0\u6E05\u9664\u7B97\u6CD5\uFF1A\u5148\u6807\u8BB0\u9700\u6E05\u9664\u7684\u5BF9\u8C61\uFF0C\u4E4B\u540E\u7EDF\u4E00\u56DE\u6536\u3002\u8FD9\u79CD\u65B9\u6CD5\u6548\u7387\u4E0D\u9AD8\uFF0C\u4F1A\u4EA7\u751F\u5927\u91CF\u4E0D\u8FDE\u7EED\u7684\u788E\u7247\u3002</li><li>\u6807\u8BB0\u6574\u7406\u7B97\u6CD5\uFF1A\u5148\u6807\u8BB0\u5B58\u6D3B\u5BF9\u8C61\uFF0C\u7136\u540E\u8BA9\u6240\u6709\u5B58\u6D3B\u5BF9\u8C61\u5411\u4E00\u7AEF\u79FB\u52A8\uFF0C\u4E4B\u540E\u6E05\u7406\u7AEF\u8FB9\u754C\u4EE5\u5916\u7684\u5185\u5B58</li><li>\u6807\u8BB0\u590D\u5236\u7B97\u6CD5\uFF1A\u5C06\u53EF\u7528\u5185\u5B58\u6309\u5BB9\u91CF\u5212\u5206\u4E3A\u5927\u5C0F\u76F8\u7B49\u7684\u4E24\u5757\uFF0C\u6BCF\u6B21\u53EA\u4F7F\u7528\u5176\u4E2D\u4E00\u5757\u3002\u5F53\u4F7F\u7528\u7684\u8FD9\u5757\u7A7A\u95F4\u7528\u5B8C\u4E86\uFF0C\u5C31\u5C06\u5B58\u6D3B\u5BF9\u8C61\u590D\u5236\u5230\u53E6\u4E00\u5757\uFF0C\u518D\u628A\u5DF2\u4F7F\u7528\u8FC7\u7684\u5185\u5B58\u7A7A\u95F4\u4E00\u6B21\u6E05\u7406\u6389\u3002</li></ul><h3 id="\u7B80\u8FF0\u5206\u4EE3\u6536\u96C6\u7B97\u6CD5" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0\u5206\u4EE3\u6536\u96C6\u7B97\u6CD5" aria-hidden="true">#</a> \u7B80\u8FF0\u5206\u4EE3\u6536\u96C6\u7B97\u6CD5</h3><p>\u6839\u636E\u5BF9\u8C61\u5B58\u6D3B\u5468\u671F\u5C06\u5185\u5B58\u5212\u5206\u4E3A\u51E0\u5757\uFF0C\u4E0D\u540C\u5757\u91C7\u7528\u9002\u5F53\u7684\u6536\u96C6\u7B97\u6CD5\u3002</p><p>\u4E00\u822C\u5C06\u5806\u5206\u4E3A\u65B0\u751F\u4EE3\u548C\u8001\u5E74\u4EE3\uFF0C\u5BF9\u8FD9\u4E24\u5757\u91C7\u7528\u4E0D\u540C\u7684\u7B97\u6CD5\u3002</p><p>\u65B0\u751F\u4EE3\u4F7F\u7528\uFF1A\u6807\u8BB0\u590D\u5236\u7B97\u6CD5</p><p>\u8001\u5E74\u4EE3\u4F7F\u7528\uFF1A\u6807\u8BB0\u6E05\u9664\u6216\u8005\u6807\u8BB0\u6574\u7406\u7B97\u6CD5</p><h3 id="\u7B80\u8FF0serial\u5783\u573E\u6536\u96C6\u5668" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0serial\u5783\u573E\u6536\u96C6\u5668" aria-hidden="true">#</a> \u7B80\u8FF0Serial\u5783\u573E\u6536\u96C6\u5668</h3><p>Serial\u5783\u573E\u6536\u96C6\u5668\u662F\u5355\u7EBF\u7A0B\u4E32\u884C\u6536\u96C6\u5668\u3002\u5783\u573E\u56DE\u6536\u7684\u65F6\u5019\uFF0C\u5FC5\u987B\u6682\u505C\u5176\u4ED6\u6240\u6709\u7EBF\u7A0B\u3002\u65B0\u751F\u4EE3\u4F7F\u7528\u6807\u8BB0\u590D\u5236\u7B97\u6CD5\uFF0C\u8001\u5E74\u4EE3\u4F7F\u7528\u6807\u8BB0\u6574\u7406\u7B97\u6CD5\u3002\u7B80\u5355\u9AD8\u6548\u3002</p><h3 id="\u7B80\u8FF0parnew\u5783\u573E\u6536\u96C6\u5668" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0parnew\u5783\u573E\u6536\u96C6\u5668" aria-hidden="true">#</a> \u7B80\u8FF0ParNew\u5783\u573E\u6536\u96C6\u5668</h3><p>ParNew\u5783\u573E\u6536\u96C6\u5668\u53EF\u4EE5\u770B\u4F5CSerial\u5783\u573E\u6536\u96C6\u5668\u7684\u591A\u7EBF\u7A0B\u7248\u672C\uFF0C\u65B0\u751F\u4EE3\u4F7F\u7528\u6807\u8BB0\u590D\u5236\u7B97\u6CD5\uFF0C\u8001\u5E74\u4EE3\u4F7F\u7528\u6807\u8BB0\u6574\u7406\u7B97\u6CD5\u3002</p><h3 id="\u7B80\u8FF0parallel-scavenge\u5783\u573E\u6536\u96C6\u5668" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0parallel-scavenge\u5783\u573E\u6536\u96C6\u5668" aria-hidden="true">#</a> \u7B80\u8FF0Parallel Scavenge\u5783\u573E\u6536\u96C6\u5668</h3><p>\u6CE8\u91CD\u541E\u5410\u91CF\uFF0C\u5373 CPU\u8FD0\u884C\u4EE3\u7801\u65F6\u95F4/CPU\u8017\u65F6\u603B\u65F6\u95F4\uFF08CPU\u8FD0\u884C\u4EE3\u7801\u65F6\u95F4+ \u5783\u573E\u56DE\u6536\u65F6\u95F4\uFF09\u3002\u65B0\u751F\u4EE3\u4F7F\u7528\u6807\u8BB0\u590D\u5236\u7B97\u6CD5\uFF0C\u8001\u5E74\u4EE3\u4F7F\u7528\u6807\u8BB0\u6574\u7406\u7B97\u6CD5\u3002</p><h3 id="\u7B80\u8FF0cms\u5783\u573E\u6536\u96C6\u5668" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0cms\u5783\u573E\u6536\u96C6\u5668" aria-hidden="true">#</a> \u7B80\u8FF0CMS\u5783\u573E\u6536\u96C6\u5668</h3><p>CMS\u5783\u573E\u6536\u96C6\u5668\u6CE8\u91CD\u6700\u77ED\u65F6\u95F4\u505C\u987F\u3002CMS\u5783\u573E\u6536\u96C6\u5668\u4E3A\u6700\u65E9\u63D0\u51FA\u7684\u5E76\u53D1\u6536\u96C6\u5668\uFF0C\u5783\u573E\u6536\u96C6\u7EBF\u7A0B\u4E0E\u7528\u6237\u7EBF\u7A0B\u540C\u65F6\u5DE5\u4F5C\u3002\u91C7\u7528\u6807\u8BB0\u6E05\u9664\u7B97\u6CD5\u3002\u8BE5\u6536\u96C6\u5668\u5206\u4E3A\u521D\u59CB\u6807\u8BB0\u3001\u5E76\u53D1\u6807\u8BB0\u3001\u5E76\u53D1\u9884\u6E05\u7406\u3001\u5E76\u53D1\u6E05\u9664\u3001\u5E76\u53D1\u91CD\u7F6E\u8FD9\u4E48\u51E0\u4E2A\u6B65\u9AA4\u3002</p><ul><li>\u521D\u59CB\u6807\u8BB0\uFF1A\u6682\u505C\u5176\u4ED6\u7EBF\u7A0B(stop the world)\uFF0C\u6807\u8BB0\u4E0EGC roots\u76F4\u63A5\u5173\u8054\u7684\u5BF9\u8C61\u3002</li><li>\u5E76\u53D1\u6807\u8BB0\uFF1A\u53EF\u8FBE\u6027\u5206\u6790\u8FC7\u7A0B(\u7A0B\u5E8F\u4E0D\u4F1A\u505C\u987F)\u3002</li><li>\u5E76\u53D1\u9884\u6E05\u7406\uFF1A\u67E5\u627E\u6267\u884C\u5E76\u53D1\u6807\u8BB0\u9636\u6BB5\u4ECE\u5E74\u8F7B\u4EE3\u664B\u5347\u5230\u8001\u5E74\u4EE3\u7684\u5BF9\u8C61\uFF0C\u91CD\u65B0\u6807\u8BB0\uFF0C\u6682\u505C\u865A\u62DF\u673A\uFF08stop the world\uFF09\u626B\u63CFCMS\u5806\u4E2D\u5269\u4F59\u5BF9\u8C61\u3002</li><li>\u5E76\u53D1\u6E05\u9664\uFF1A\u6E05\u7406\u5783\u573E\u5BF9\u8C61\uFF0C(\u7A0B\u5E8F\u4E0D\u4F1A\u505C\u987F)\u3002</li><li>\u5E76\u53D1\u91CD\u7F6E\uFF0C\u91CD\u7F6ECMS\u6536\u96C6\u5668\u7684\u6570\u636E\u7ED3\u6784\u3002</li></ul><h3 id="\u7B80\u8FF0g1\u5783\u573E\u6536\u96C6\u5668" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0g1\u5783\u573E\u6536\u96C6\u5668" aria-hidden="true">#</a> \u7B80\u8FF0G1\u5783\u573E\u6536\u96C6\u5668</h3><p>\u548CSerial\u3001Parallel Scavenge\u3001CMS\u4E0D\u540C\uFF0CG1\u5783\u573E\u6536\u96C6\u5668\u628A\u5806\u5212\u5206\u6210\u591A\u4E2A\u5927\u5C0F\u76F8\u7B49\u7684\u72EC\u7ACB\u533A\u57DF\uFF08Region\uFF09\uFF0C\u65B0\u751F\u4EE3\u548C\u8001\u5E74\u4EE3\u4E0D\u518D\u7269\u7406\u9694\u79BB\u3002\u901A\u8FC7\u5F15\u5165 Region \u7684\u6982\u5FF5\uFF0C\u4ECE\u800C\u5C06\u539F\u6765\u7684\u4E00\u6574\u5757\u5185\u5B58\u7A7A\u95F4\u5212\u5206\u6210\u591A\u4E2A\u7684\u5C0F\u7A7A\u95F4\uFF0C\u4F7F\u5F97\u6BCF\u4E2A\u5C0F\u7A7A\u95F4\u53EF\u4EE5\u5355\u72EC\u8FDB\u884C\u5783\u573E\u56DE\u6536\u3002</p><ul><li>\u521D\u59CB\u6807\u8BB0\uFF1A\u6807\u8BB0\u4E0EGC roots\u76F4\u63A5\u5173\u8054\u7684\u5BF9\u8C61\u3002</li><li>\u5E76\u53D1\u6807\u8BB0\uFF1A\u53EF\u8FBE\u6027\u5206\u6790\u3002</li><li>\u6700\u7EC8\u6807\u8BB0\uFF1A\u5BF9\u5E76\u53D1\u6807\u8BB0\u8FC7\u7A0B\u4E2D\uFF0C\u7528\u6237\u7EBF\u7A0B\u4FEE\u6539\u7684\u5BF9\u8C61\u518D\u6B21\u6807\u8BB0\u4E00\u4E0B\u3002</li><li>\u7B5B\u9009\u56DE\u6536\uFF1A\u5BF9\u5404\u4E2ARegion\u7684\u56DE\u6536\u4EF7\u503C\u548C\u6210\u672C\u8FDB\u884C\u6392\u5E8F\uFF0C\u7136\u540E\u6839\u636E\u7528\u6237\u6240\u671F\u671B\u7684GC\u505C\u987F\u65F6\u95F4\u5236\u5B9A\u56DE\u6536\u8BA1\u5212\u5E76\u56DE\u6536\u3002</li></ul><h3 id="\u7B80\u8FF0minor-gc" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0minor-gc" aria-hidden="true">#</a> \u7B80\u8FF0Minor GC</h3><p>Minor GC\u6307\u53D1\u751F\u5728\u65B0\u751F\u4EE3\u7684\u5783\u573E\u6536\u96C6\uFF0C\u56E0\u4E3A Java \u5BF9\u8C61\u5927\u591A\u5B58\u6D3B\u65F6\u95F4\u77ED\uFF0C\u6240\u4EE5 Minor GC \u975E\u5E38\u9891\u7E41\uFF0C\u4E00\u822C\u56DE\u6536\u901F\u5EA6\u4E5F\u6BD4\u8F83\u5FEB\u3002</p><h3 id="\u7B80\u8FF0full-gc" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0full-gc" aria-hidden="true">#</a> \u7B80\u8FF0Full GC</h3><p>Full GC \u662F\u6E05\u7406\u6574\u4E2A\u5806\u7A7A\u95F4\u2014\u5305\u62EC\u5E74\u8F7B\u4EE3\u548C\u6C38\u4E45\u4EE3\u3002\u8C03\u7528System.gc(),\u8001\u5E74\u4EE3\u7A7A\u95F4\u4E0D\u8DB3\uFF0C\u7A7A\u95F4\u5206\u914D\u62C5\u4FDD\u5931\u8D25\uFF0C\u6C38\u751F\u4EE3\u7A7A\u95F4\u4E0D\u8DB3\u4F1A\u4EA7\u751Ffull gc\u3002</p><h3 id="\u5E38\u89C1\u5185\u5B58\u5206\u914D\u7B56\u7565" tabindex="-1"><a class="header-anchor" href="#\u5E38\u89C1\u5185\u5B58\u5206\u914D\u7B56\u7565" aria-hidden="true">#</a> \u5E38\u89C1\u5185\u5B58\u5206\u914D\u7B56\u7565</h3><p>\u5927\u591A\u6570\u60C5\u51B5\u4E0B\u5BF9\u8C61\u5728\u65B0\u751F\u4EE3 Eden \u533A\u5206\u914D\uFF0C\u5F53 Eden \u6CA1\u6709\u8DB3\u591F\u7A7A\u95F4\u65F6\u5C06\u53D1\u8D77\u4E00\u6B21 Minor GC\u3002</p><p>\u5927\u5BF9\u8C61\u9700\u8981\u5927\u91CF\u8FDE\u7EED\u5185\u5B58\u7A7A\u95F4\uFF0C\u76F4\u63A5\u8FDB\u5165\u8001\u5E74\u4EE3\u533A\u5206\u914D\u3002</p><p>\u5982\u679C\u7ECF\u5386\u8FC7\u7B2C\u4E00\u6B21 Minor GC \u4ECD\u7136\u5B58\u6D3B\u4E14\u80FD\u88AB Survivor \u5BB9\u7EB3\uFF0C\u8BE5\u5BF9\u8C61\u5C31\u4F1A\u88AB\u79FB\u52A8\u5230 Survivor \u4E2D\u5E76\u5C06\u5E74\u9F84\u8BBE\u7F6E\u4E3A 1\uFF0C\u5E76\u4E14\u6BCF\u71AC\u8FC7\u4E00\u6B21 Minor GC \u5E74\u9F84\u5C31\u52A0 1 \uFF0C\u5F53\u589E\u52A0\u5230\u4E00\u5B9A\u7A0B\u5EA6\uFF08\u9ED8\u8BA415\uFF09\u5C31\u4F1A\u88AB\u664B\u5347\u5230\u8001\u5E74\u4EE3\u3002</p><p>\u5982\u679C\u5728 Survivor \u4E2D\u76F8\u540C\u5E74\u9F84\u6240\u6709\u5BF9\u8C61\u5927\u5C0F\u7684\u603B\u548C\u5927\u4E8E Survivor \u7684\u4E00\u534A\uFF0C\u5E74\u9F84\u4E0D\u5C0F\u4E8E\u8BE5\u5E74\u9F84\u7684\u5BF9\u8C61\u5C31\u53EF\u4EE5\u76F4\u63A5\u8FDB\u5165\u8001\u5E74\u4EE3\u3002</p><p>MinorGC \u524D\uFF0C\u865A\u62DF\u673A\u5FC5\u987B\u68C0\u67E5\u8001\u5E74\u4EE3\u6700\u5927\u53EF\u7528\u8FDE\u7EED\u7A7A\u95F4\u662F\u5426\u5927\u4E8E\u65B0\u751F\u4EE3\u5BF9\u8C61\u603B\u7A7A\u95F4\uFF0C\u5982\u679C\u6EE1\u8DB3\u5219\u8BF4\u660E\u8FD9\u6B21 Minor GC \u786E\u5B9A\u5B89\u5168\u3002\u5982\u679C\u4E0D\uFF0CJVM\u4F1A\u67E5\u770BHandlePromotionFailure \u53C2\u6570\u662F\u5426\u5141\u8BB8\u62C5\u4FDD\u5931\u8D25\uFF0C\u5982\u679C\u5141\u8BB8\u4F1A\u7EE7\u7EED\u68C0\u67E5\u8001\u5E74\u4EE3\u6700\u5927\u53EF\u7528\u8FDE\u7EED\u7A7A\u95F4\u662F\u5426\u5927\u4E8E\u5386\u6B21\u664B\u5347\u8001\u5E74\u4EE3\u5BF9\u8C61\u7684\u5E73\u5747\u5927\u5C0F\uFF0C\u5982\u679C\u6EE1\u8DB3\u5C06Minor GC\uFF0C\u5426\u5219\u6539\u6210\u4E00\u6B21 FullGC\u3002</p><h3 id="\u7B80\u8FF0jvm\u7C7B\u52A0\u8F7D\u8FC7\u7A0B" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0jvm\u7C7B\u52A0\u8F7D\u8FC7\u7A0B" aria-hidden="true">#</a> \u7B80\u8FF0JVM\u7C7B\u52A0\u8F7D\u8FC7\u7A0B</h3><p>1\uFF09\u52A0\u8F7D\uFF1A</p><ul><li>\u901A\u8FC7\u5168\u7C7B\u540D\u83B7\u53D6\u7C7B\u7684\u4E8C\u8FDB\u5236\u5B57\u8282\u6D41\u3002</li><li>\u5C06\u7C7B\u7684\u9759\u6001\u5B58\u50A8\u7ED3\u6784\u8F6C\u5316\u4E3A\u65B9\u6CD5\u533A\u7684\u8FD0\u884C\u65F6\u6570\u636E\u7ED3\u6784\u3002</li><li>\u5728\u5185\u5B58\u4E2D\u751F\u6210\u7C7B\u7684Class\u5BF9\u8C61\uFF0C\u4F5C\u4E3A\u65B9\u6CD5\u533A\u6570\u636E\u7684\u5165\u53E3\u3002</li></ul><p>2\uFF09\u9A8C\u8BC1\uFF1A\u5BF9\u6587\u4EF6\u683C\u5F0F\uFF0C\u5143\u6570\u636E\uFF0C\u5B57\u8282\u7801\uFF0C\u7B26\u53F7\u5F15\u7528\u7B49\u9A8C\u8BC1\u6B63\u786E\u6027\u3002</p><p>3\uFF09\u51C6\u5907\uFF1A\u5728\u65B9\u6CD5\u533A\u5185\u4E3A\u7C7B\u53D8\u91CF\u5206\u914D\u5185\u5B58\u5E76\u8BBE\u7F6E\u4E3A0\u503C\u3002</p><p>4\uFF09\u89E3\u6790\uFF1A\u5C06\u7B26\u53F7\u5F15\u7528\u8F6C\u5316\u4E3A\u76F4\u63A5\u5F15\u7528\u3002</p><p>5\uFF09\u521D\u59CB\u5316\uFF1A\u6267\u884C\u7C7B\u6784\u9020\u5668clinit\u65B9\u6CD5\uFF0C\u771F\u6B63\u521D\u59CB\u5316\u3002</p><h3 id="\u7B80\u8FF0jvm\u4E2D\u7684\u7C7B\u52A0\u8F7D\u5668" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0jvm\u4E2D\u7684\u7C7B\u52A0\u8F7D\u5668" aria-hidden="true">#</a> \u7B80\u8FF0JVM\u4E2D\u7684\u7C7B\u52A0\u8F7D\u5668</h3><ul><li>BootstrapClassLoader\u542F\u52A8\u7C7B\u52A0\u8F7D\u5668\uFF1A\u52A0\u8F7D/lib\u4E0B\u7684jar\u5305\u548C\u7C7B\u3002 \u7531C++\u7F16\u5199\u3002</li><li>ExtensionClassLoader\u6269\u5C55\u7C7B\u52A0\u8F7D\u5668\uFF1A /lib/ext\u76EE\u5F55\u4E0B\u7684jar\u5305\u548C\u7C7B\u3002\u7531Java\u7F16\u5199\u3002</li><li>AppClassLoader\u5E94\u7528\u7C7B\u52A0\u8F7D\u5668\uFF0C\u52A0\u8F7D\u5F53\u524DclassPath\u4E0B\u7684jar\u5305\u548C\u7C7B\u3002\u7531Java\u7F16\u5199\u3002</li></ul><h3 id="\u7B80\u8FF0\u53CC\u4EB2\u59D4\u6D3E\u673A\u5236" tabindex="-1"><a class="header-anchor" href="#\u7B80\u8FF0\u53CC\u4EB2\u59D4\u6D3E\u673A\u5236" aria-hidden="true">#</a> \u7B80\u8FF0\u53CC\u4EB2\u59D4\u6D3E\u673A\u5236</h3><p>\u4E00\u4E2A\u7C7B\u52A0\u8F7D\u5668\u6536\u5230\u7C7B\u52A0\u8F7D\u8BF7\u6C42\u4E4B\u540E\uFF0C\u9996\u5148\u5224\u65AD\u5F53\u524D\u7C7B\u662F\u5426\u88AB\u52A0\u8F7D\u8FC7\u3002\u5DF2\u7ECF\u88AB\u52A0\u8F7D\u7684\u7C7B\u4F1A\u76F4\u63A5\u8FD4\u56DE\uFF0C\u5982\u679C\u6CA1\u6709\u88AB\u52A0\u8F7D\uFF0C\u9996\u5148\u5C06\u7C7B\u52A0\u8F7D\u8BF7\u6C42\u8F6C\u53D1\u7ED9\u7236\u7C7B\u52A0\u8F7D\u5668\uFF0C\u4E00\u76F4\u8F6C\u53D1\u5230\u542F\u52A8\u7C7B\u52A0\u8F7D\u5668\uFF0C\u53EA\u6709\u5F53\u7236\u7C7B\u52A0\u8F7D\u5668\u65E0\u6CD5\u5B8C\u6210\u65F6\u624D\u5C1D\u8BD5\u81EA\u5DF1\u52A0\u8F7D\u3002</p><p>\u52A0\u8F7D\u7C7B\u987A\u5E8F\uFF1ABootstrapClassLoader-&gt;ExtensionClassLoader-&gt;AppClassLoader-&gt;CustomClassLoader \u68C0\u67E5\u7C7B\u662F\u5426\u52A0\u8F7D\u987A\u5E8F\uFF1A CustomClassLoader-&gt;AppClassLoader-&gt;ExtensionClassLoader-&gt;BootstrapClassLoader</p><h3 id="\u53CC\u4EB2\u59D4\u6D3E\u673A\u5236\u7684\u4F18\u70B9" tabindex="-1"><a class="header-anchor" href="#\u53CC\u4EB2\u59D4\u6D3E\u673A\u5236\u7684\u4F18\u70B9" aria-hidden="true">#</a> \u53CC\u4EB2\u59D4\u6D3E\u673A\u5236\u7684\u4F18\u70B9</h3><ul><li>\u907F\u514D\u7C7B\u7684\u91CD\u590D\u52A0\u8F7D\u3002\u76F8\u540C\u7684\u7C7B\u88AB\u4E0D\u540C\u7684\u7C7B\u52A0\u8F7D\u5668\u52A0\u8F7D\u4F1A\u4EA7\u751F\u4E0D\u540C\u7684\u7C7B\uFF0C\u53CC\u4EB2\u59D4\u6D3E\u4FDD\u8BC1\u4E86Java\u7A0B\u5E8F\u7684\u7A33\u5B9A\u8FD0\u884C\u3002</li><li>\u4FDD\u8BC1\u6838\u5FC3API\u4E0D\u88AB\u4FEE\u6539\u3002</li><li>\u5982\u4F55\u7834\u574F\u53CC\u4EB2\u59D4\u6D3E\u673A\u5236</li><li>\u91CD\u8F7DloadClass()\u65B9\u6CD5\uFF0C\u5373\u81EA\u5B9A\u4E49\u7C7B\u52A0\u8F7D\u5668\u3002</li></ul><h3 id="\u5982\u4F55\u6784\u5EFA\u81EA\u5B9A\u4E49\u7C7B\u52A0\u8F7D\u5668" tabindex="-1"><a class="header-anchor" href="#\u5982\u4F55\u6784\u5EFA\u81EA\u5B9A\u4E49\u7C7B\u52A0\u8F7D\u5668" aria-hidden="true">#</a> \u5982\u4F55\u6784\u5EFA\u81EA\u5B9A\u4E49\u7C7B\u52A0\u8F7D\u5668</h3><p>\u65B0\u5EFA\u81EA\u5B9A\u4E49\u7C7B\u7EE7\u627F\u81EAjava.lang.ClassLoader\uFF0C\u91CD\u5199findClass\u3001loadClass\u3001defineClass\u65B9\u6CD5</p><h3 id="jvm\u5E38\u89C1\u8C03\u4F18\u53C2\u6570" tabindex="-1"><a class="header-anchor" href="#jvm\u5E38\u89C1\u8C03\u4F18\u53C2\u6570" aria-hidden="true">#</a> JVM\u5E38\u89C1\u8C03\u4F18\u53C2\u6570</h3><ul><li>-Xms \u521D\u59CB\u5806\u5927\u5C0F</li><li>-Xmx \u6700\u5927\u5806\u5927\u5C0F</li><li>-XX:NewSize \u5E74\u8F7B\u4EE3\u5927\u5C0F</li><li>-XX:MaxNewSize \u5E74\u8F7B\u4EE3\u6700\u5927\u503C</li><li>-XX:PermSize \u6C38\u751F\u4EE3\u521D\u59CB\u503C</li><li>-XX:MaxPermSize \u6C38\u751F\u4EE3\u6700\u5927\u503C</li><li>-XX:NewRatio \u65B0\u751F\u4EE3\u4E0E\u8001\u5E74\u4EE3\u7684\u6BD4\u4F8B</li></ul><hr>',97),p=e("\u6295\u7A3F\u4F5C\u8005\uFF1A\u540E\u7AEF\u6280\u672F\u5C0F\u725B\u8BF4 \u8F6C\u8F7D\u94FE\u63A5\uFF1A"),c={href:"https://mp.weixin.qq.com/s/PmeH38qWVxyIhBpsAsjG7w",target:"_blank",rel:"noopener noreferrer"},u=e("https://mp.weixin.qq.com/s/PmeH38qWVxyIhBpsAsjG7w"),v=a("p",null,[a("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png",alt:""})],-1);function f(m,C){const r=l("ExternalLinkIcon");return h(),d("div",null,[s,a("p",null,[p,a("a",c,[u,n(r)])]),v])}var J=i(o,[["render",f],["__file","jvm.html.vue"]]);export{J as default};
diff --git a/dist/assets/jwt.html.e910af0e.js b/dist/assets/jwt.html.2aed3523.js
similarity index 99%
rename from dist/assets/jwt.html.e910af0e.js
rename to dist/assets/jwt.html.2aed3523.js
index e838e637..724ff8d6 100644
--- a/dist/assets/jwt.html.e910af0e.js
+++ b/dist/assets/jwt.html.2aed3523.js
@@ -1,4 +1,4 @@
-import{_ as p}from"./plugin-vue_export-helper.21dcd24c.js";import{r as o,o as c,c as i,a as n,b as t,e,d as s}from"./app.a0271b9c.js";const l={},u=e('<h2 id="\u5E72\u6389session-\u8FD9\u4E2A\u8DE8\u57DF\u8BA4\u8BC1\u89E3\u51B3\u65B9\u6848\u771F\u7684\u4F18\u96C5" tabindex="-1"><a class="header-anchor" href="#\u5E72\u6389session-\u8FD9\u4E2A\u8DE8\u57DF\u8BA4\u8BC1\u89E3\u51B3\u65B9\u6848\u771F\u7684\u4F18\u96C5" aria-hidden="true">#</a> \u5E72\u6389Session\uFF1F\u8FD9\u4E2A\u8DE8\u57DF\u8BA4\u8BC1\u89E3\u51B3\u65B9\u6848\u771F\u7684\u4F18\u96C5\uFF01</h2><p>\u7528\u6237\u767B\u5F55\u8BA4\u8BC1\u662F Web \u5E94\u7528\u4E2D\u975E\u5E38\u5E38\u89C1\u7684\u4E00\u4E2A\u4E1A\u52A1\uFF0C\u4E00\u822C\u7684\u6D41\u7A0B\u662F\u8FD9\u6837\u7684\uFF1A</p><ul><li>\u5BA2\u6237\u7AEF\u5411\u670D\u52A1\u5668\u7AEF\u53D1\u9001\u7528\u6237\u540D\u548C\u5BC6\u7801</li><li>\u670D\u52A1\u5668\u7AEF\u9A8C\u8BC1\u901A\u8FC7\u540E\uFF0C\u5728\u5F53\u524D\u4F1A\u8BDD\uFF08session\uFF09\u4E2D\u4FDD\u5B58\u76F8\u5173\u6570\u636E\uFF0C\u6BD4\u5982\u8BF4\u767B\u5F55\u65F6\u95F4\u3001\u767B\u5F55 IP \u7B49\u3002</li><li>\u670D\u52A1\u5668\u7AEF\u5411\u5BA2\u6237\u7AEF\u8FD4\u56DE\u4E00\u4E2A session_id\uFF0C\u5BA2\u6237\u7AEF\u5C06\u5176\u4FDD\u5B58\u5728 Cookie \u4E2D\u3002</li><li>\u5BA2\u6237\u7AEF\u518D\u5411\u670D\u52A1\u5668\u7AEF\u53D1\u8D77\u8BF7\u6C42\u65F6\uFF0C\u5C06 session_id \u4F20\u56DE\u7ED9\u670D\u52A1\u5668\u7AEF\u3002</li><li>\u670D\u52A1\u5668\u7AEF\u62FF\u5230 session_id \u540E\uFF0C\u5BF9\u7528\u6237\u7684\u8EAB\u4EFD\u8FDB\u884C\u9274\u5B9A\u3002</li></ul><p>\u5355\u673A\u60C5\u51B5\u4E0B\uFF0C\u8FD9\u79CD\u6A21\u5F0F\u662F\u6CA1\u6709\u4EFB\u4F55\u95EE\u9898\u7684\uFF0C\u4F46\u5BF9\u4E8E\u524D\u540E\u7AEF\u5206\u79BB\u7684 Web \u5E94\u7528\u6765\u8BF4\uFF0C\u5C31\u975E\u5E38\u75DB\u82E6\u4E86\u3002\u4E8E\u662F\u5C31\u6709\u4E86\u53E6\u5916\u4E00\u79CD\u89E3\u51B3\u65B9\u6848\uFF0C\u670D\u52A1\u5668\u7AEF\u4E0D\u518D\u4FDD\u5B58 session \u6570\u636E\uFF0C\u800C\u662F\u5C06\u5176\u4FDD\u5B58\u5728\u5BA2\u6237\u7AEF\uFF0C\u5BA2\u6237\u7AEF\u6BCF\u6B21\u53D1\u8D77\u8BF7\u6C42\u65F6\u518D\u628A\u8FD9\u4E2A\u6570\u636E\u53D1\u9001\u7ED9\u670D\u52A1\u5668\u7AEF\u8FDB\u884C\u9A8C\u8BC1\u3002<strong>JWT</strong>\uFF08JSON Web Token\uFF09\u5C31\u662F\u8FD9\u79CD\u65B9\u6848\u7684\u5178\u578B\u4EE3\u8868\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/jwt-1.png" alt=""></p><h3 id="\u4E00\u3001\u5173\u4E8E-jwt" tabindex="-1"><a class="header-anchor" href="#\u4E00\u3001\u5173\u4E8E-jwt" aria-hidden="true">#</a> \u4E00\u3001\u5173\u4E8E JWT</h3>',6),r=s("JWT\uFF0C\u662F\u76EE\u524D\u6700\u6D41\u884C\u7684\u4E00\u4E2A"),k={href:"https://mp.weixin.qq.com/s/HTMDZaukCb7pyfHefVcfyg",target:"_blank",rel:"noopener noreferrer"},d=s("\u8DE8\u57DF"),v=s("\u8BA4\u8BC1\u89E3\u51B3\u65B9\u6848\uFF1A\u5BA2\u6237\u7AEF\u53D1\u8D77\u7528\u6237\u767B\u5F55\u8BF7\u6C42\uFF0C\u670D\u52A1\u5668\u7AEF\u63A5\u6536\u5E76\u8BA4\u8BC1\u6210\u529F\u540E\uFF0C\u751F\u6210\u4E00\u4E2A JSON \u5BF9\u8C61\uFF08\u5982\u4E0B\u6240\u793A\uFF09\uFF0C\u7136\u540E\u5C06\u5176\u8FD4\u56DE\u7ED9\u5BA2\u6237\u7AEF\u3002"),m=e(`<div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>{
+import{_ as p}from"./plugin-vue_export-helper.21dcd24c.js";import{r as o,o as c,c as i,a as n,b as t,e,d as s}from"./app.615e41d8.js";const l={},u=e('<h2 id="\u5E72\u6389session-\u8FD9\u4E2A\u8DE8\u57DF\u8BA4\u8BC1\u89E3\u51B3\u65B9\u6848\u771F\u7684\u4F18\u96C5" tabindex="-1"><a class="header-anchor" href="#\u5E72\u6389session-\u8FD9\u4E2A\u8DE8\u57DF\u8BA4\u8BC1\u89E3\u51B3\u65B9\u6848\u771F\u7684\u4F18\u96C5" aria-hidden="true">#</a> \u5E72\u6389Session\uFF1F\u8FD9\u4E2A\u8DE8\u57DF\u8BA4\u8BC1\u89E3\u51B3\u65B9\u6848\u771F\u7684\u4F18\u96C5\uFF01</h2><p>\u7528\u6237\u767B\u5F55\u8BA4\u8BC1\u662F Web \u5E94\u7528\u4E2D\u975E\u5E38\u5E38\u89C1\u7684\u4E00\u4E2A\u4E1A\u52A1\uFF0C\u4E00\u822C\u7684\u6D41\u7A0B\u662F\u8FD9\u6837\u7684\uFF1A</p><ul><li>\u5BA2\u6237\u7AEF\u5411\u670D\u52A1\u5668\u7AEF\u53D1\u9001\u7528\u6237\u540D\u548C\u5BC6\u7801</li><li>\u670D\u52A1\u5668\u7AEF\u9A8C\u8BC1\u901A\u8FC7\u540E\uFF0C\u5728\u5F53\u524D\u4F1A\u8BDD\uFF08session\uFF09\u4E2D\u4FDD\u5B58\u76F8\u5173\u6570\u636E\uFF0C\u6BD4\u5982\u8BF4\u767B\u5F55\u65F6\u95F4\u3001\u767B\u5F55 IP \u7B49\u3002</li><li>\u670D\u52A1\u5668\u7AEF\u5411\u5BA2\u6237\u7AEF\u8FD4\u56DE\u4E00\u4E2A session_id\uFF0C\u5BA2\u6237\u7AEF\u5C06\u5176\u4FDD\u5B58\u5728 Cookie \u4E2D\u3002</li><li>\u5BA2\u6237\u7AEF\u518D\u5411\u670D\u52A1\u5668\u7AEF\u53D1\u8D77\u8BF7\u6C42\u65F6\uFF0C\u5C06 session_id \u4F20\u56DE\u7ED9\u670D\u52A1\u5668\u7AEF\u3002</li><li>\u670D\u52A1\u5668\u7AEF\u62FF\u5230 session_id \u540E\uFF0C\u5BF9\u7528\u6237\u7684\u8EAB\u4EFD\u8FDB\u884C\u9274\u5B9A\u3002</li></ul><p>\u5355\u673A\u60C5\u51B5\u4E0B\uFF0C\u8FD9\u79CD\u6A21\u5F0F\u662F\u6CA1\u6709\u4EFB\u4F55\u95EE\u9898\u7684\uFF0C\u4F46\u5BF9\u4E8E\u524D\u540E\u7AEF\u5206\u79BB\u7684 Web \u5E94\u7528\u6765\u8BF4\uFF0C\u5C31\u975E\u5E38\u75DB\u82E6\u4E86\u3002\u4E8E\u662F\u5C31\u6709\u4E86\u53E6\u5916\u4E00\u79CD\u89E3\u51B3\u65B9\u6848\uFF0C\u670D\u52A1\u5668\u7AEF\u4E0D\u518D\u4FDD\u5B58 session \u6570\u636E\uFF0C\u800C\u662F\u5C06\u5176\u4FDD\u5B58\u5728\u5BA2\u6237\u7AEF\uFF0C\u5BA2\u6237\u7AEF\u6BCF\u6B21\u53D1\u8D77\u8BF7\u6C42\u65F6\u518D\u628A\u8FD9\u4E2A\u6570\u636E\u53D1\u9001\u7ED9\u670D\u52A1\u5668\u7AEF\u8FDB\u884C\u9A8C\u8BC1\u3002<strong>JWT</strong>\uFF08JSON Web Token\uFF09\u5C31\u662F\u8FD9\u79CD\u65B9\u6848\u7684\u5178\u578B\u4EE3\u8868\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/jwt-1.png" alt=""></p><h3 id="\u4E00\u3001\u5173\u4E8E-jwt" tabindex="-1"><a class="header-anchor" href="#\u4E00\u3001\u5173\u4E8E-jwt" aria-hidden="true">#</a> \u4E00\u3001\u5173\u4E8E JWT</h3>',6),r=s("JWT\uFF0C\u662F\u76EE\u524D\u6700\u6D41\u884C\u7684\u4E00\u4E2A"),k={href:"https://mp.weixin.qq.com/s/HTMDZaukCb7pyfHefVcfyg",target:"_blank",rel:"noopener noreferrer"},d=s("\u8DE8\u57DF"),v=s("\u8BA4\u8BC1\u89E3\u51B3\u65B9\u6848\uFF1A\u5BA2\u6237\u7AEF\u53D1\u8D77\u7528\u6237\u767B\u5F55\u8BF7\u6C42\uFF0C\u670D\u52A1\u5668\u7AEF\u63A5\u6536\u5E76\u8BA4\u8BC1\u6210\u529F\u540E\uFF0C\u751F\u6210\u4E00\u4E2A JSON \u5BF9\u8C61\uFF08\u5982\u4E0B\u6240\u793A\uFF09\uFF0C\u7136\u540E\u5C06\u5176\u8FD4\u56DE\u7ED9\u5BA2\u6237\u7AEF\u3002"),m=e(`<div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>{
   &quot;sub&quot;: &quot;wanger&quot;,
   &quot;created&quot;: 1645700436900,
   &quot;exp&quot;: 1646305236
diff --git a/dist/assets/knife4j.html.44253ad0.js b/dist/assets/knife4j.html.4fbb94b8.js
similarity index 75%
rename from dist/assets/knife4j.html.44253ad0.js
rename to dist/assets/knife4j.html.4fbb94b8.js
index c3941b31..bb4fe303 100644
--- a/dist/assets/knife4j.html.44253ad0.js
+++ b/dist/assets/knife4j.html.4fbb94b8.js
@@ -1,4 +1,4 @@
-import{_ as c}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o as i,c as l,a as n,b as a,w as u,d as s,e}from"./app.a0271b9c.js";const r={},k=s("\u4E00\u822C\u5728\u4F7F\u7528 Spring Boot \u5F00\u53D1\u524D\u540E\u7AEF\u5206\u79BB\u9879\u76EE\u7684\u65F6\u5019\uFF0C\u90FD\u4F1A\u7528\u5230 "),d={href:"https://tobebetterjavaer.com/springboot/swagger.html",target:"_blank",rel:"noopener noreferrer"},g=s("Swagger"),m=s("\uFF08\u6233\u94FE\u63A5\u8BE6\u7EC6\u4E86\u89E3\uFF09\u3002"),v=e('<p>\u4F46\u968F\u7740\u7CFB\u7EDF\u529F\u80FD\u7684\u4E0D\u65AD\u589E\u52A0\uFF0C\u63A5\u53E3\u6570\u91CF\u7684\u7206\u70B8\u5F0F\u589E\u957F\uFF0CSwagger \u7684\u4F7F\u7528\u4F53\u9A8C\u5C31\u4F1A\u53D8\u5F97\u8D8A\u6765\u8D8A\u5DEE\uFF0C\u6BD4\u5982\u8BF7\u6C42\u53C2\u6570\u4E3A JSON \u7684\u65F6\u5019\u6CA1\u529E\u6CD5\u683C\u5F0F\u5316\uFF0C\u8FD4\u56DE\u7ED3\u679C\u6CA1\u529E\u6CD5\u6298\u53E0\uFF0C\u8FD8\u6709\u5C31\u662F\u6CA1\u6709\u63D0\u4F9B\u641C\u7D22\u529F\u80FD\u3002</p><p>\u4ECA\u5929\u6211\u4EEC\u4ECB\u7ECD\u7684\u4E3B\u89D2 Knife4j \u5F25\u8865\u4E86\u8FD9\u4E9B\u4E0D\u8DB3\uFF0C\u8D4B\u4E88\u4E86 Swagger \u66F4\u5F3A\u7684\u751F\u547D\u529B\u548C\u8868\u73B0\u529B\u3002</p><h3 id="\u5173\u4E8E-knife4j" tabindex="-1"><a class="header-anchor" href="#\u5173\u4E8E-knife4j" aria-hidden="true">#</a> \u5173\u4E8E Knife4j</h3><p>Knife4j \u7684\u524D\u8EAB\u662F swagger-bootstrap-ui\uFF0C\u662F springfox-swagger-ui \u7684\u589E\u5F3A UI \u5B9E\u73B0\u3002swagger-bootstrap-ui \u91C7\u7528\u7684\u662F\u524D\u7AEF UI \u6DF7\u5408\u540E\u7AEF Java \u4EE3\u7801\u7684\u6253\u5305\u65B9\u5F0F\uFF0C\u5728\u5FAE\u670D\u52A1\u7684\u573A\u666F\u4E0B\u663E\u5F97\u975E\u5E38\u81C3\u80BF\uFF0C\u6539\u826F\u540E\u7684 Knife4j \u66F4\u52A0\u5C0F\u5DE7\u3001\u8F7B\u91CF\uFF0C\u5E76\u4E14\u529F\u80FD\u66F4\u52A0\u5F3A\u5927\u3002</p><p>springfox-swagger-ui \u7684\u754C\u9762\u957F\u8FD9\u4E2A\u6837\u5B50\uFF0C\u8BF4\u5B9E\u8BDD\uFF0C\u786E\u5B9E\u7565\u663E\u4E11\u964B\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/knife4j-1.png" alt=""></p><p>swagger-bootstrap-ui \u589E\u5F3A\u540E\u7684\u6837\u5B50\u957F\u4E0B\u9762\u8FD9\u6837\u3002\u5355\u7EAF\u4ECE\u76F4\u89C2\u4F53\u9A8C\u4E0A\u6765\u770B\uFF0C\u786E\u5B9E\u589E\u5F3A\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/knife4j-2.png" alt=""></p><p>\u90A3\u6539\u826F\u540E\u7684 Knife4j \u4E0D\u4EC5\u5728\u754C\u9762\u4E0A\u66F4\u52A0\u4F18\u96C5\u3001\u70AB\u9177\uFF0C\u529F\u80FD\u4E0A\u4E5F\u66F4\u52A0\u5F3A\u5927\uFF1A\u540E\u7AEF Java \u4EE3\u7801\u548C\u524D\u7AEF UI \u6A21\u5757\u5206\u79BB\u4E86\u51FA\u6765\uFF0C\u5728\u5FAE\u670D\u52A1\u573A\u666F\u4E0B\u66F4\u52A0\u7075\u6D3B\uFF1B\u8FD8\u63D0\u4F9B\u4E86\u4E13\u6CE8\u4E8E Swagger \u7684\u589E\u5F3A\u89E3\u51B3\u65B9\u6848\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/knife4j-3.png" alt=""></p><p>\u5B98\u65B9\u6587\u6863\uFF1A</p>',11),b={href:"https://doc.xiaominfo.com/knife4j/documentation/",target:"_blank",rel:"noopener noreferrer"},h=s("https://doc.xiaominfo.com/knife4j/documentation/"),f=n("p",null,"\u7801\u4E91\u5730\u5740\uFF1A",-1),_={href:"https://gitee.com/xiaoym/knife4j",target:"_blank",rel:"noopener noreferrer"},j=s("https://gitee.com/xiaoym/knife4j"),w=n("p",null,"\u793A\u4F8B\u5730\u5740\uFF1A",-1),x={href:"https://gitee.com/xiaoym/swagger-bootstrap-ui-demo",target:"_blank",rel:"noopener noreferrer"},y=s("https://gitee.com/xiaoym/swagger-bootstrap-ui-demo"),q=e(`<h3 id="\u6574\u5408-knife4j" tabindex="-1"><a class="header-anchor" href="#\u6574\u5408-knife4j" aria-hidden="true">#</a> \u6574\u5408 Knife4j</h3><p>Knife4j \u5B8C\u5168\u9075\u5FAA\u4E86 Swagger \u7684\u4F7F\u7528\u65B9\u5F0F\uFF0C\u6240\u4EE5\u53EF\u4EE5\u65E0\u7F1D\u5207\u6362\u3002</p><p>\u7B2C\u4E00\u6B65\uFF0C\u5728 pom.xml \u6587\u4EF6\u4E2D\u6DFB\u52A0 Knife4j \u7684\u4F9D\u8D56\uFF08<strong>\u4E0D\u9700\u8981\u518D\u5F15\u5165 springfox-boot-starter</strong>\u4E86\uFF0C\u56E0\u4E3A Knife4j \u7684 starter \u91CC\u9762\u5DF2\u7ECF\u52A0\u5165\u8FC7\u4E86\uFF09\u3002</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
+import{_ as p}from"./plugin-vue_export-helper.21dcd24c.js";import{r as o,o as c,c as i,a as n,b as t,d as s,e}from"./app.615e41d8.js";const l={},u=s("\u4E00\u822C\u5728\u4F7F\u7528 Spring Boot \u5F00\u53D1\u524D\u540E\u7AEF\u5206\u79BB\u9879\u76EE\u7684\u65F6\u5019\uFF0C\u90FD\u4F1A\u7528\u5230 "),r={href:"https://tobebetterjavaer.com/springboot/swagger.html",target:"_blank",rel:"noopener noreferrer"},k=s("Swagger"),d=s("\uFF08\u6233\u94FE\u63A5\u8BE6\u7EC6\u4E86\u89E3\uFF09\u3002"),g=e('<p>\u4F46\u968F\u7740\u7CFB\u7EDF\u529F\u80FD\u7684\u4E0D\u65AD\u589E\u52A0\uFF0C\u63A5\u53E3\u6570\u91CF\u7684\u7206\u70B8\u5F0F\u589E\u957F\uFF0CSwagger \u7684\u4F7F\u7528\u4F53\u9A8C\u5C31\u4F1A\u53D8\u5F97\u8D8A\u6765\u8D8A\u5DEE\uFF0C\u6BD4\u5982\u8BF7\u6C42\u53C2\u6570\u4E3A JSON \u7684\u65F6\u5019\u6CA1\u529E\u6CD5\u683C\u5F0F\u5316\uFF0C\u8FD4\u56DE\u7ED3\u679C\u6CA1\u529E\u6CD5\u6298\u53E0\uFF0C\u8FD8\u6709\u5C31\u662F\u6CA1\u6709\u63D0\u4F9B\u641C\u7D22\u529F\u80FD\u3002</p><p>\u4ECA\u5929\u6211\u4EEC\u4ECB\u7ECD\u7684\u4E3B\u89D2 Knife4j \u5F25\u8865\u4E86\u8FD9\u4E9B\u4E0D\u8DB3\uFF0C\u8D4B\u4E88\u4E86 Swagger \u66F4\u5F3A\u7684\u751F\u547D\u529B\u548C\u8868\u73B0\u529B\u3002</p><h2 id="\u5173\u4E8E-knife4j" tabindex="-1"><a class="header-anchor" href="#\u5173\u4E8E-knife4j" aria-hidden="true">#</a> \u5173\u4E8E Knife4j</h2><p>Knife4j \u7684\u524D\u8EAB\u662F swagger-bootstrap-ui\uFF0C\u662F springfox-swagger-ui \u7684\u589E\u5F3A UI \u5B9E\u73B0\u3002swagger-bootstrap-ui \u91C7\u7528\u7684\u662F\u524D\u7AEF UI \u6DF7\u5408\u540E\u7AEF Java \u4EE3\u7801\u7684\u6253\u5305\u65B9\u5F0F\uFF0C\u5728\u5FAE\u670D\u52A1\u7684\u573A\u666F\u4E0B\u663E\u5F97\u975E\u5E38\u81C3\u80BF\uFF0C\u6539\u826F\u540E\u7684 Knife4j \u66F4\u52A0\u5C0F\u5DE7\u3001\u8F7B\u91CF\uFF0C\u5E76\u4E14\u529F\u80FD\u66F4\u52A0\u5F3A\u5927\u3002</p><p>springfox-swagger-ui \u7684\u754C\u9762\u957F\u8FD9\u4E2A\u6837\u5B50\uFF0C\u8BF4\u5B9E\u8BDD\uFF0C\u786E\u5B9E\u7565\u663E\u4E11\u964B\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/knife4j-1.png" alt=""></p><p>swagger-bootstrap-ui \u589E\u5F3A\u540E\u7684\u6837\u5B50\u957F\u4E0B\u9762\u8FD9\u6837\u3002\u5355\u7EAF\u4ECE\u76F4\u89C2\u4F53\u9A8C\u4E0A\u6765\u770B\uFF0C\u786E\u5B9E\u589E\u5F3A\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/knife4j-2.png" alt=""></p><p>\u90A3\u6539\u826F\u540E\u7684 Knife4j \u4E0D\u4EC5\u5728\u754C\u9762\u4E0A\u66F4\u52A0\u4F18\u96C5\u3001\u70AB\u9177\uFF0C\u529F\u80FD\u4E0A\u4E5F\u66F4\u52A0\u5F3A\u5927\uFF1A\u540E\u7AEF Java \u4EE3\u7801\u548C\u524D\u7AEF UI \u6A21\u5757\u5206\u79BB\u4E86\u51FA\u6765\uFF0C\u5728\u5FAE\u670D\u52A1\u573A\u666F\u4E0B\u66F4\u52A0\u7075\u6D3B\uFF1B\u8FD8\u63D0\u4F9B\u4E86\u4E13\u6CE8\u4E8E Swagger \u7684\u589E\u5F3A\u89E3\u51B3\u65B9\u6848\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/knife4j-3.png" alt=""></p><p>\u5B98\u65B9\u6587\u6863\uFF1A</p>',11),m={href:"https://doc.xiaominfo.com/knife4j/documentation/",target:"_blank",rel:"noopener noreferrer"},v=s("https://doc.xiaominfo.com/knife4j/documentation/"),b=n("p",null,"\u7801\u4E91\u5730\u5740\uFF1A",-1),h={href:"https://gitee.com/xiaoym/knife4j",target:"_blank",rel:"noopener noreferrer"},f=s("https://gitee.com/xiaoym/knife4j"),_=n("p",null,"\u793A\u4F8B\u5730\u5740\uFF1A",-1),j={href:"https://gitee.com/xiaoym/swagger-bootstrap-ui-demo",target:"_blank",rel:"noopener noreferrer"},w=s("https://gitee.com/xiaoym/swagger-bootstrap-ui-demo"),x=e(`<h2 id="\u6574\u5408-knife4j" tabindex="-1"><a class="header-anchor" href="#\u6574\u5408-knife4j" aria-hidden="true">#</a> \u6574\u5408 Knife4j</h2><p>Knife4j \u5B8C\u5168\u9075\u5FAA\u4E86 Swagger \u7684\u4F7F\u7528\u65B9\u5F0F\uFF0C\u6240\u4EE5\u53EF\u4EE5\u65E0\u7F1D\u5207\u6362\u3002</p><p>\u7B2C\u4E00\u6B65\uFF0C\u5728 pom.xml \u6587\u4EF6\u4E2D\u6DFB\u52A0 Knife4j \u7684\u4F9D\u8D56\uFF08<strong>\u4E0D\u9700\u8981\u518D\u5F15\u5165 springfox-boot-starter</strong>\u4E86\uFF0C\u56E0\u4E3A Knife4j \u7684 starter \u91CC\u9762\u5DF2\u7ECF\u52A0\u5165\u8FC7\u4E86\uFF09\u3002</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
     &lt;groupId&gt;com.github.xiaoymin&lt;/groupId&gt;
     &lt;artifactId&gt;knife4j-spring-boot-starter&lt;/artifactId&gt;
     &lt;!--\u5728\u5F15\u7528\u65F6\u8BF7\u5728maven\u4E2D\u592E\u4ED3\u5E93\u641C\u7D223.X\u6700\u65B0\u7248\u672C\u53F7--&gt;
@@ -40,7 +40,7 @@ import{_ as c}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o as i,
         <span class="token keyword">return</span> <span class="token string">&quot;\u6C89\u9ED8\u738B\u4E8C\u53C8\u5E05\u53C8\u4E11&quot;</span><span class="token punctuation">;</span>
     <span class="token punctuation">}</span>
 <span class="token punctuation">}</span>
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div>`,8),S=s("\u7B2C\u56DB\u6B65\uFF0C\u7531\u4E8E springfox 3.0.x \u7248\u672C \u548C Spring Boot 2.6.x \u7248\u672C\u6709\u51B2\u7A81\uFF0C\u6240\u4EE5\u8FD8\u9700\u8981\u5148\u89E3\u51B3\u8FD9\u4E2A bug\uFF0C\u4E00\u5171\u5206\u4E24\u6B65\uFF08\u5728"),I={href:"https://tobebetterjavaer.com/springboot/swagger.html",target:"_blank",rel:"noopener noreferrer"},P=s("Swagger"),K=s(" \u90A3\u7BC7\u5DF2\u7ECF\u89E3\u91CA\u8FC7\u4E86\uFF0C\u8FD9\u91CC\u4E0D\u518D\u8D58\u8FF0\uFF0C\u4F46\u9632\u6B62\u6709\u5C0F\u4F19\u4F34\u5728\u5B66\u4E60\u7684\u65F6\u5019\u518D\u6B21\u8DF3\u5751\uFF0C\u8FD9\u91CC\u5C31\u91CD\u590D\u4E00\u4E0B\u6B65\u9AA4\uFF09\u3002"),A=e(`<p>\u5148\u5728 application.yml \u6587\u4EF6\u4E2D\u52A0\u5165\uFF1A</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>spring:
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div>`,8),y=s("\u7B2C\u56DB\u6B65\uFF0C\u7531\u4E8E springfox 3.0.x \u7248\u672C \u548C Spring Boot 2.6.x \u7248\u672C\u6709\u51B2\u7A81\uFF0C\u6240\u4EE5\u8FD8\u9700\u8981\u5148\u89E3\u51B3\u8FD9\u4E2A bug\uFF0C\u4E00\u5171\u5206\u4E24\u6B65\uFF08\u5728"),q={href:"https://tobebetterjavaer.com/springboot/swagger.html",target:"_blank",rel:"noopener noreferrer"},S=s("Swagger"),I=s(" \u90A3\u7BC7\u5DF2\u7ECF\u89E3\u91CA\u8FC7\u4E86\uFF0C\u8FD9\u91CC\u4E0D\u518D\u8D58\u8FF0\uFF0C\u4F46\u9632\u6B62\u6709\u5C0F\u4F19\u4F34\u5728\u5B66\u4E60\u7684\u65F6\u5019\u518D\u6B21\u8DF3\u5751\uFF0C\u8FD9\u91CC\u5C31\u91CD\u590D\u4E00\u4E0B\u6B65\u9AA4\uFF09\u3002"),P=e(`<p>\u5148\u5728 application.yml \u6587\u4EF6\u4E2D\u52A0\u5165\uFF1A</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>spring:
   mvc:
     path match:
       matching-strategy: ANT_PATH_MATCHER
@@ -76,4 +76,4 @@ import{_ as c}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o as i,
         <span class="token punctuation">}</span>
     <span class="token punctuation">}</span><span class="token punctuation">;</span>
 <span class="token punctuation">}</span>
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>\u4EE5\u4E0A\u6B65\u9AA4\u5747\u5B8C\u6210\u540E\uFF0C\u5F00\u59CB\u4E0B\u4E00\u6B65\uFF0C\u5426\u5219\u8981\u4E48\u9879\u76EE\u542F\u52A8\u7684\u65F6\u5019\u62A5\u9519\uFF0C\u8981\u4E48\u5728\u6587\u6863\u4E2D\u770B\u4E0D\u5230\u6D4B\u8BD5\u7684\u6587\u6863\u63A5\u53E3\u3002</p><p>\u7B2C\u4E94\u6B65\uFF0C\u8FD0\u884C Spring Boot \u9879\u76EE\uFF0C\u6D4F\u89C8\u5668\u5730\u5740\u680F\u8F93\u5165\u4EE5\u4E0B\u5730\u5740\u8BBF\u95EE API \u6587\u6863\uFF0C\u67E5\u770B\u6548\u679C\u3002</p>`,6),M=s("\u8BBF\u95EE\u5730\u5740\uFF08\u548C Swagger \u4E0D\u540C\uFF09\uFF1A"),B={href:"http://localhost:8080/doc.html",target:"_blank",rel:"noopener noreferrer"},H=s("http://localhost:8080/doc.html"),R=n("p",null,[n("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/knife4j-0a9eb2b1-bace-4f47-ace9-8a5f9f280279.png",alt:""})],-1),C=n("p",null,"\u662F\u4E0D\u662F\u6BD4 Swagger 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diff --git a/dist/assets/knife4j.html.fe2f8e7d.js b/dist/assets/knife4j.html.a18b3a85.js
similarity index 72%
rename from dist/assets/knife4j.html.fe2f8e7d.js
rename to dist/assets/knife4j.html.a18b3a85.js
index 65323a4b..b3c1abfd 100644
--- a/dist/assets/knife4j.html.fe2f8e7d.js
+++ b/dist/assets/knife4j.html.a18b3a85.js
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similarity index 99%
rename from dist/assets/lanqiaobei.html.489bde40.js
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index bdad5302..7215234b 100644
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+++ b/dist/assets/lanqiaobei.html.e24944e8.js
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\u6709\u7740\u4E0D\u5C0F\u7684\u4F18\u52BF\u4E86\u3002</p><p><strong>\u{1F34B}\u7B2C\u56DB\u3001\u516C\u53F8\u5BF9\u7B97\u6CD5\u7684\u80FD\u529B\u8981\u6C42\u8D8A\u6765\u8D8A\u9AD8</strong></p><p>\u73B0\u5728\u6574\u4E2Ait\u884C\u4E1A\u7684\u516C\u53F8\u65E0\u8BBA\u662F\u5927\u5382\u8FD8\u662F\u5C0F\u5382\uFF0C\u65E0\u8BBA\u662F\u6821\u62DB\u8FD8\u662F\u793E\u62DB\uFF0C\u5BF9\u7B97\u6CD5\u7684\u8003\u5DEE\u90FD\u662F\u5FC5\u987B\u7684\u3002\u5BF9\u4E8E\u5927\u5382\u6765\u8BF4\uFF0C\u4F60\u7684\u7B97\u6CD5\u4E0D\u8FC7\u5173\uFF0C\u4E0D\u597D\u610F\u601D\u6211\u4EEC\u4E0D\u8981\u4F60\u3002\u5BF9\u4E8E\u5C0F\u5382\u6765\u8BF4\uFF0C\u4F60\u7684\u7B97\u6CD5\u4E0D\u8FC7\u5173\uFF0C\u5BF9\u4E0D\u8D77\u6211\u4EEC\u4E0D\u80FD\u7ED9\u4F60\u66F4\u9AD8\u7684\u804C\u4F4D\u548C\u85AA\u8D44\u3002</p><p>\u6240\u4EE5\u5728\u6211\u4EEC\u51C6\u5907\u84DD\u6865\u676F\u7684\u8FC7\u7A0B\u5B66\u4E60\u7B97\u6CD5\u7684\u8FC7\u7A0B\uFF0C\u540C\u65F6\u4E5F\u662F\u4E3A\u4E86\u6211\u4EEC\u672A\u6765\u5C31\u4E1A\u505A\u51C6\u5907\u3002\u53EF\u4EE5\u8BF4\uFF0C\u7B97\u6CD5\u80FD\u529B\u51B3\u5B9A\u4E86\u4F60\u7684\u94B1\u9014\u548C\u524D\u9014\u3002\u60F3\u8981\u5728\u672A\u6765\u62FF\u4E2A\u597Doffer\uFF0C\u53C2\u52A0\u84DD\u6865\u676F\u6B63\u662F\u4F60\u4E0D\u53EF\u6216\u7F3A\u7684\u3002</p><h3 id="\u{1F31E}\u4E09\u3001\u73B0\u57280\u57FA\u7840\u53C2\u52A0\u8FD8\u6765\u5F97\u53CA\u5417" tabindex="-1"><a class="header-anchor" href="#\u{1F31E}\u4E09\u3001\u73B0\u57280\u57FA\u7840\u53C2\u52A0\u8FD8\u6765\u5F97\u53CA\u5417" aria-hidden="true">#</a> \u{1F31E}\u4E09\u3001\u73B0\u57280\u57FA\u7840\u53C2\u52A0\u8FD8\u6765\u5F97\u53CA\u5417?</h3><p>\u73B0\u5728\u53C2\u52A0\u4E00\u70B9\u90FD\u4E0D\u665A\u3002</p><p>\u84DD\u6865\u676F\u73B0\u5728\u53EA\u662F\u5904\u5728\u62A5\u540D\u9636\u6BB5\uFF0C\u5B83\u771F\u6B63\u6BD4\u8D5B\u7684\u65E5\u671F\u8981\u5728\u660E\u5E74\u56DB\u6708\u4EFD\u5DE6\u53F3\u3002\u4E0D\u4E25\u683C\u610F\u4E49\u7684\u6765\u7B97\uFF0C\u4F60\u751A\u81F3\u8FD8\u6709\u534A\u5E74\u7684\u65F6\u95F4\u53BB\u5B66\u4E60\u548C\u51C6\u5907\u3002</p><p><strong>\u4EFB\u4F55\u4E8B\u60C5\u80FD\u591F\u575A\u6301\u534A\u5E74\uFF0C\u90FD\u80FD\u4E3A\u4E00\u4E2A\u4EBA\u5E26\u6765\u5DE8\u5927\u7684\u8715\u53D8</strong>\u3002\u53EA\u8981\u4F60\u6BCF\u5468\u80FD\u62FF\u51FA\u4E00\u70B9\u65F6\u95F4\u5B66\u4E60\u7B97\u6CD5\uFF0C\u6301\u4E4B\u4EE5\u6052\uFF0C\u6B63\u6240\u8C13\u58EB\u522B\u4E09\u65E5\u8FD8\u5C06\u522E\u76EE\u60F3\u770B\uFF0C\u534A\u5E74\u7684\u5B66\u4E60\uFF0C\u5B8C\u5168\u80FD\u8BA9\u4F60\u6210\u529F\u6210\u4E3A\u4E00\u4E2A\u7B97\u6CD5\u5C0F\u5C06\uFF0C\u751A\u81F3\u66F4\u52A0\u4F18\u79C0\u3002</p><h3 id="\u{1F31E}\u56DB\u3001\u84DD\u6865\u676F\u8003\u7684\u662F\u4EC0\u4E48-\u96BE\u5417-\u548Cacm\u6709\u4EC0\u4E48\u533A\u522B" tabindex="-1"><a class="header-anchor" href="#\u{1F31E}\u56DB\u3001\u84DD\u6865\u676F\u8003\u7684\u662F\u4EC0\u4E48-\u96BE\u5417-\u548Cacm\u6709\u4EC0\u4E48\u533A\u522B" aria-hidden="true">#</a> \u{1F31E}\u56DB\u3001\u84DD\u6865\u676F\u8003\u7684\u662F\u4EC0\u4E48?\u96BE\u5417\uFF1F\u548CACM\u6709\u4EC0\u4E48\u533A\u522B\uFF1F</h3><p>\u84DD\u6865\u676F\u7684\u7701\u8D5B\u6709\u5341\u9053\u9898\uFF0C\u56DB\u4E2A\u5C0F\u65F6\u7684\u65F6\u95F4\u3002\u9898\u76EE\u6709\u586B\u7A7A\u9898\u548C\u7F16\u7A0B\u9898\uFF0C\u586B\u7A7A\u9898\u53EA\u8981\u4F60\u7684\u7B54\u6848\u6B63\u786E\u5373\u53EF\u5F97\u5206\uFF0C\u7F16\u7A0B\u9898\u5373\u4F7F\u4F60\u7684\u7B54\u6848\u4E0D\u5BF9\uFF0C\u4E5F\u53EF\u4EE5\u6309\u6B65\u9AA4\u5F97\u5206\uFF0C\u53EF\u4EE5\u8BF4\u975E\u5E38\u7684\u4EBA\u6027\u5316\u3002</p><p>\u5B83\u4E0D\u540C\u4E8EACM\u7684ACM\u56E2\u961F\u8D5B\u5236\uFF0CACM\u9898\u76EE\u662F\u82F1\u8BED\u7684\uFF0C\u5FC5\u987B\u8FD0\u884C\u7684\u7ED3\u679C\u6B63\u786E\u624D\u53EF\u5F97\u5206\u3002ACM\u7684\u9898\u76EE\u8981\u66F4\u52A0\u96BE\uFF0C\u8003\u5BDF\u7684\u66F4\u591A\u662F\u4EBA\u7684\u601D\u7EF4\u80FD\u529B\uFF0C\u4E5F\u53EF\u4EE5\u8BF4\u662F\u5929\u8D4B\uFF0C\u5B83\u5E76\u4E0D\u9002\u5408\u5927\u90E8\u5206\u4EBA\u53BB\u53C2\u52A0\uFF0C\u800C\u4E14\u9700\u8981\u4ED8\u51FA\u7684\u65F6\u95F4\u4E5F\u66F4\u591A\u3002</p><p>\u800C\u84DD\u6865\u676F\u7684\u9898\u76EE\u867D\u7136\u79F0\u4E0D\u4E0A\u662F\u975E\u5E38\u96BE\uFF0C\u4F46\u4E5F\u5E76\u975E\u4EBA\u4EBA\u90FD\u80FD\u4F1A\u7684\u3002\u4F46\u4F60\u5982\u679C\u80AF\u82B1\u4E00\u4E9B\u65F6\u95F4\u53BB\u5B66\u4E60\uFF0C\u90A3\u5B83\u7ED9\u4F60\u7684\u7ED3\u679C\u4E5F\u80AF\u5B9A\u4E0D\u4F1A\u8BA9\u4F60\u5931\u671B\u3002\u5B83\u7684\u9898\u578B\u6BD4\u8F83\u5355\u4E00\uFF0C\u66F4\u591A\u7684\u662F\u8003\u5DEE\u5B66\u4E60\u638C\u63E1\u4E86\u54EA\u4E9B\u7B97\u6CD5\u80FD\u529B\u3002<strong>\u84DD\u6865\u676F\u7684\u9898\u578B\u66F4\u559C\u6B22\u8003\u66B4\u529B\u3001\u679A\u4E3E\u3001\u52A8\u89C4\u7B49\u95EE\u9898</strong>\u3002</p><h3 id="\u{1F31E}\u4E94\u3001\u5907\u6218\u84DD\u6865\u7684\u5B66\u4E60\u8DEF\u7EBF\u548C\u5237\u9898\u7F51\u7AD9" tabindex="-1"><a class="header-anchor" href="#\u{1F31E}\u4E94\u3001\u5907\u6218\u84DD\u6865\u7684\u5B66\u4E60\u8DEF\u7EBF\u548C\u5237\u9898\u7F51\u7AD9" aria-hidden="true">#</a> \u{1F31E}\u4E94\u3001\u5907\u6218\u84DD\u6865\u7684\u5B66\u4E60\u8DEF\u7EBF\u548C\u5237\u9898\u7F51\u7AD9</h3><p>\u5982\u679C\u4F60\u662FC/C++\u7684\u9009\u624B\uFF0C\u90A3\u6211\u529D\u4F60\u4E00\u5B9A\u8981\u8BA4\u771F\u5B66\u597D\u6240\u6709\u7684\u57FA\u7840\u7B97\u6CD5\u3002C\u548CC++\u90FD\u662F\u975E\u5E38\u9002\u5408\u7528\u6765\u5199\u7B97\u6CD5\u7684\u8BED\u8A00\uFF0C\u6240\u4EE5\u8FD9\u4E2A\u7EC4\u522B\u7684\u9009\u624B\u5927\u591A\u90FD\u662F\u6709\u4E00\u5B9A\u7684\u5B9E\u529B\u7684\uFF0C\u5982\u679C\u4F60\u60F3\u6765\u6DF7\u53EF\u80FD\u88AB\u5403\u7684\u6E23\u90FD\u4E0D\u5269\u3002\u5F53\u7136\u5176\u4ED6\u4E24\u7EC4\u9009\u624B\u4E5F\u975E\u5E38\u591A\uFF0C\u6240\u4EE5\u4E5F\u9700\u8981\u8BA4\u771F\u53BB\u590D\u4E60\uFF0C\u5148\u770B\u770B\u6211\u5F52\u7EB3\u7684\u5B66\u4E60\u8DEF\u7EBF\u56FE\u3002</p><p><img src="https://upload-images.jianshu.io/upload_images/1179389-267796e602b75052.png?imageMogr2/auto-orient/strip|imageView2/2/w/1240" alt=""></p><p>\u4E0D\u8981\u4E00\u4E0B\u89C9\u5F97\u5F88\u591A\uFF0C\u5F88\u591A\u90FD\u662F\u5728\u5B66\u6821\u7684\u8BFE\u7A0B\u4E2D\u5B66\u5230\u8FC7\u7684\uFF0C\u800C\u4E14\u4F60\u8FD8\u6709\u534A\u5E74\u7684\u65F6\u95F4\uFF0C\u60F3\u8981\u638C\u63E1\u8FD9\u91CC\u9762\u7684\u5927\u90E8\u5206\u7B97\u6CD5\u5B8C\u5168\u65F6\u95F4\u7EF0\u7EF0\u6709\u4F59\u3002\u5F53\u7136\u4E5F\u4E3A\u5927\u5BB6\u63A8\u8350\u4E86\u4E00\u4E9B\u597D\u7684\u5B66\u4E60\u7B97\u6CD5\u548C\u6570\u636E\u7ED3\u6784\u7684\u7F51\u7AD9</p><p>\u529B\u6263\uFF08yyds\uFF09\uFF1A</p>',35),_={href:"https://leetcode-cn.com/",target:"_blank",rel:"noopener noreferrer"},u=n("https://leetcode-cn.com/"),b=e("p",null,"\u725B\u5BA2\u7F51\uFF08\u540C\u6837\u7ECF\u5178\u7684\u5237\u9898\u7F51\u7AD9\uFF09\uFF1A",-1),m={href:"https://www.nowcoder.com/activity/oj?tab=1",target:"_blank",rel:"noopener noreferrer"},f=n("https://www.nowcoder.com/activity/oj?tab=1"),w=e("p",null,"PTA\uFF08\u9002\u5408\u5C0F\u767D\uFF09\uFF1A",-1),k={href:"https://pintia.cn/",target:"_blank",rel:"noopener noreferrer"},v=n("https://pintia.cn/"),q=e("p",null,"VisuAlgo \u6570\u636E\u7ED3\u6784\u548C\u7B97\u6CD5\u52A8\u6001\u53EF\u89C6\u5316\uFF08\u5B66\u4E60\u6570\u636E\u7ED3\u6784\u7684\u795E\u5668\uFF09\uFF1A",-1),x={href:"https://visualgo.net/zh",target:"_blank",rel:"noopener noreferrer"},C=n("https://visualgo.net/zh"),V=e("p",null,"\u84DD\u6865\u4E91\u8BFE\uFF08\u84DD\u6865\u676F\u5B98\u65B9\u5B66\u4E60\u7F51\u7AD9\uFF09\uFF1A",-1),j={href:"https://www.lanqiao.cn/",target:"_blank",rel:"noopener noreferrer"},A=n("https://www.lanqiao.cn/"),M=e("p",null,"\u5F53\u7136\u522B\u5FD8\u8BB0\u4E86\u54D4\u54E9\u54D4\u54E9\u5927\u5B66\uFF0C\u91CC\u9762\u4E5F\u6709\u975E\u5E38\u4F18\u79C0\u7684\u8D44\u6E90\uFF0C\u4E0B\u9762\u5411\u5927\u5BB6\u63A8\u8350\u51E0\u4E2A\u6211\u81EA\u5DF1\u5B66\u4E60\u8FC7\u7684\uFF1A",-1),B=e("p",null,"\u56FE\u7075\u6570\u636E\u7ED3\u6784\u4E0E\u7B97\u6CD5\uFF1A",-1),y=e("p",null,[e("img",{src:"https://upload-images.jianshu.io/upload_images/1179389-1f0e23da66059bd3.png?imageMogr2/auto-orient/strip|imageView2/2/w/1240",alt:""})],-1),E={href:"https://www.bilibili.com/video/BV1a54y1b74k",target:"_blank",rel:"noopener noreferrer"},z=n("https://www.bilibili.com/video/BV1a54y1b74k"),J=e("p",null,"\u53EF\u80FD\u662F\u6700\u597D\u7684Java\u6570\u636E\u7ED3\u6784\u6559\u7A0B\uFF1A",-1),N=e("p",null,[e("img",{src:"https://upload-images.jianshu.io/upload_images/1179389-589bf36b1ec3191d.png?imageMogr2/auto-orient/strip|imageView2/2/w/1240",alt:""})],-1),T={href:"https://www.bilibili.com/video/BV1iJ411E7xW",target:"_blank",rel:"noopener noreferrer"},I=n("https://www.bilibili.com/video/BV1iJ411E7xW"),L=e("p",null,"\u8FD8\u6709 C \u7AD9\u4E0A\u6700\u5F3A\u7684\u7B97\u6CD5\u5927\u4F6C\uFF0C\u82F1\u96C4\u54EA\u91CC\u51FA\u6765\u3002",-1),P={href:"https://blog.csdn.net/whereisherofrom",target:"_blank",rel:"noopener noreferrer"},W=n("https://blog.csdn.net/whereisherofrom"),S=a('<p>\u5927\u4F6C\u7684\u6587\u7AE0\u8BB2\u89E3\u4E86\u5404\u79CD\u4ECE\u6613\u5230\u96BE\u7684\u7B97\u6CD5\uFF0C\u800C\u4E14\u8BB2\u7684\u975E\u5E38\u900F\u5F7B\u3002</p><h3 id="\u{1F31E}\u516D\u3001\u5982\u4F55\u6B63\u786E\u7684\u5237\u9898" tabindex="-1"><a class="header-anchor" href="#\u{1F31E}\u516D\u3001\u5982\u4F55\u6B63\u786E\u7684\u5237\u9898" aria-hidden="true">#</a> \u{1F31E}\u516D\u3001\u5982\u4F55\u6B63\u786E\u7684\u5237\u9898\uFF1F</h3><p>\u8FD9\u91CC\u6211\u7ED3\u5408\u81EA\u8EAB\u5237\u9898\u7684\u7ECF\u9A8C\u548C\u4E00\u4E9B\u535A\u4E3B\u7684\u63A8\u8350\u5411\u5927\u5BB6\u63A8\u8350\u4E00\u4E0B\uFF0C\u5982\u679C\u4F60\u662F\u96F6\u57FA\u7840\u6216\u8005\u57FA\u7840\u4E0D\u597D\u7684\uFF0C\u6BCF\u6B21\u53EA\u662F\u95F2\u7740\u65E0\u804A\u624D\u5750\u4E00\u4E24\u9898\uFF0C\u73B0\u5728\u60F3\u7CFB\u7EDF\u7684\u5B66\u4E60\u7B97\u6CD5\u3002\u6211\u63A8\u8350\u4F60\u5148\u53BB\u529B\u6263\u7F51\u7AD9\u3002</p><p><img src="https://img-blog.csdnimg.cn/40f236b195004f738e89a1c6277947ac.png" alt=""></p><p>\u5728\u8FD9\u9009\u62E9\u96BE\u5EA6\u7B80\u5355\uFF0C\u7136\u540E\u6311\u4E00\u4E9B\u9898\u89E3\u91CF\u9AD8\uFF0C\u901A\u8FC7\u7387\u9AD8\u7684\u9898\u76EE\u8BD5\u8BD5\u6C34\u3002\u8FD9\u7C7B\u9898\u76EE\u57FA\u672C\u6BD4\u8F83\u7B80\u5355\uFF0C\u4E0D\u4F1A\u6D89\u53CA\u5230\u4EC0\u4E48\u7B97\u6CD5\uFF0C\u6BCF\u6B21\u63D0\u4EA4\u6210\u529F\u90FD\u53EF\u4EE5\u6FC0\u53D1\u4F60\u5B66\u4E60\u7B97\u6CD5\u7684\u5174\u8DA3\u3002</p><p>\u5373\u4F7F\u505A\u4E0D\u51FA\u6765\u91CC\u9762\u4E5F\u6709\u8BB8\u591A\u5927\u4F6C\u7684\u9898\u89E3\u4E94\u82B1\u516B\u95E8\uFF0C\u8BA9\u4F60\u4EEC\u4E00\u773C\u770B\u61C2\u4ED6\u4EEC\u7684\u795E\u5947\u601D\u8DEF\u3002\u6709\u7684\u4EBA\u603B\u662F\u597D\u9AD8\u9A9B\u8FDC\uFF0C\u5165\u95E8\u5C31\u53BB\u5B66\u4EC0\u4E48\u8D2A\u5FC3\u52A8\u6001\uFF0C\u4E00\u9053\u9898\u770B\u4E24\u4E09\u4E2A\u949F\u5934\uFF0C\u7ED3\u679C\u6700\u540E\u9898\u89E3\u90FD\u770B\u4E0D\u61C2\uFF0C\u8FD9\u662F\u5B66\u4E60\u7B97\u6CD5\u7684\u5927\u5FCC\u3002</p><p>\u7B49\u4F60\u8BD5\u6C34\u5B8C\u6BD5\u6709\u4E86\u4E00\u5B9A\u505A\u9898\u7ECF\u9A8C\u540E\uFF0C\u6211\u63A8\u8350\u4F60\u53BB\u53C2\u52A0\u529B\u6263\u7684\u5B66\u4E60\u8BA1\u5212\u4E13\u680F\uFF0C\u8FD9\u4E9B\u90FD\u662F\u514D\u8D39\u7684\uFF0C\u4ECE\u53CC\u6307\u9488\u5230\u52A8\u89C4\u548C\u6570\u636E\u7ED3\u6784\u90FD\u6709\uFF0C\u53EF\u4EE5\u5E2E\u4F60\u4E00\u6B65\u4E00\u6B65\u5E2E\u4F60\u8BAD\u7EC3\u51FA\u4F18\u79C0\u7684\u7B97\u6CD5\u80FD\u529B\u3002</p><p><img src="https://img-blog.csdnimg.cn/3e2c94a9bed44193a6e18c2d6a0df7a6.png" alt=""></p><p><strong>\u5237\u9898\u4E5F\u5343\u4E07\u4E0D\u8981\u5FD8\u8BB0\u5F52\u7EB3\u603B\u7ED3</strong>\uFF01\uFF01\uFF01</p><p>\u5237\u9898\u5E76\u4E0D\u662F\u5237\u5B8C\u5C31\u8FC7\u4E86\u5373\u53EF\uFF0C\u9898\u76EE\u5728\u53D8\u5316\uFF0C\u4F46\u9898\u578B\u6C38\u8FDC\u5C31\u90A3\u4E48\u4E00\u4E9B\u3002\u53EA\u6709\u5F52\u7EB3\u51FA\u5C5E\u4E8E\u81EA\u5DF1\u7684\u4E00\u5957\u7B14\u8BB0\uFF0C\u624D\u80FD\u505A\u9898\u8D8A\u6765\u8D8A\u5F97\u5FC3\u5E94\u624B\u3002\u5C06\u8003\u70B9\u76F8\u540C\u7684\u7B97\u6CD5\u70B9\u603B\u7ED3\uFF0C\u518D\u53BB\u5BFB\u627E\u7C7B\u4F3C\u7684\u7B97\u6CD5\u9898\u770B\u80FD\u5426\u505A\u51FA\u6765\u68C0\u9A8C\u81EA\u5DF1\uFF0C\u8FD9\u6837\u624D\u80FD\u641E\u660E\u767D\u81EA\u5DF1\u662F\u5426\u771F\u7684\u5B66\u4F1A\u4E86\u8FD9\u4E2A\u7B97\u6CD5\u3002</p><p>\u6211\u4E3A\u5927\u5BB6\u63A8\u8350\u7684\u662F\u6211\u81EA\u5DF1\u5E38\u7528\u7684\u7B14\u8BB0\u8F6F\u4EF6\u8BED\u96C0\uFF0C\u8D34\u4E0A\u90E8\u5206\u6211\u505A\u7684\u7B14\u8BB0\uFF0C\u53EF\u4EE5\u76F4\u63A5\u8D34\u56FE\u975E\u5E38\u65B9\u4FBF\u3002\u5F53\u7136\u8FD8\u6709\u6709\u9053\u4E91\u7B14\u8BB0\uFF0CTypora\u7B49\u7B49\u90FD\u975E\u5E38\u4E0D\u9519\u3002</p><p><img src="https://img-blog.csdnimg.cn/9881f0d441514f9e9de5d7da3f7aa4e8.png" alt=""></p><h3 id="\u{1F31E}\u4E03\u3001\u84DD\u6865\u5E74\u771F\u9898\u8D44\u6E90-\u914D\u5957\u8003\u8BD5\u73AF\u5883" tabindex="-1"><a class="header-anchor" href="#\u{1F31E}\u4E03\u3001\u84DD\u6865\u5E74\u771F\u9898\u8D44\u6E90-\u914D\u5957\u8003\u8BD5\u73AF\u5883" aria-hidden="true">#</a> \u{1F31E}\u4E03\u3001\u84DD\u6865\u5E74\u771F\u9898\u8D44\u6E90+\u914D\u5957\u8003\u8BD5\u73AF\u5883</h3><p><img src="https://upload-images.jianshu.io/upload_images/1179389-966a1b1b2b82e154.png?imageMogr2/auto-orient/strip|imageView2/2/w/1240" alt=""></p><p>\u8D39\u4E86\u4E5D\u725B\u4E8C\u864E\u4E4B\u529B\uFF0C\u7EC8\u4E8E\u641E\u5230\u4E86\u8FD9\u4E9B\u5173\u4E8E\u84DD\u6865\u676F\u7684\u5B66\u4E60\u8D44\u6599\uFF0C\u5982\u679C\u80FD\u8BA4\u771F\u5237\u5B8C\uFF0C\u60F3\u8F93\u5F88\u96BE\u7684\uFF0C\u60F3\u4EA4\u5B66\u8D39\u5F88\u96BE\u7684\u2014\u2014\u59A5\u59A5\u5730\u8D62\u56DE\u6765\u3002</p><p><strong>\u600E\u4E48\u83B7\u53D6\u5462\uFF1F</strong></p><p>\u7531\u4E8E\u8D44\u6599\u975E\u5E38\u5BB9\u6613\u88AB\u6CB3\u87F9\uFF0C\u9700\u8981\u7684\u5C0F\u4F19\u4F34\u53EF\u4EE5\u957F\u6309\u8BC6\u522B/\u626B\u63CF\u5173\u6CE8\u516C\u4F17\u53F7\u300C<strong>\u6C89\u9ED8\u738B\u4E8C</strong>\u300D\uFF0C\u56DE\u590D\u5173\u952E\u5B57\u300C<strong>\u84DD\u6865\u676F</strong>\u300D\u5373\u53EF\u83B7\u53D6\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongzhonghao.png" alt="\u626B\u7801\u5173\u6CE8\u540E\u56DE\u590D\u300C\u84DD\u6865\u676F\u300D\u5173\u952E\u5B57"></p>',18);function D(F,G){const t=r("ExternalLinkIcon");return p(),s("div",null,[h,e("blockquote",null,[e("p",null,[e("a",c,[d,o(t)])])]),g,e("blockquote",null,[e("p",null,[e("a",_,[u,o(t)])])]),b,e("blockquote",null,[e("p",null,[e("a",m,[f,o(t)])])]),w,e("blockquote",null,[e("p",null,[e("a",k,[v,o(t)])])]),q,e("blockquote",null,[e("p",null,[e("a",x,[C,o(t)])])]),V,e("blockquote",null,[e("p",null,[e("a",j,[A,o(t)])])]),M,B,y,e("blockquote",null,[e("p",null,[e("a",E,[z,o(t)])])]),J,N,e("blockquote",null,[e("p",null,[e("a",T,[I,o(t)])])]),L,e("blockquote",null,[e("p",null,[e("a",P,[W,o(t)])])]),S])}var O=i(l,[["render",D],["__file","lanqiaobei.html.vue"]]);export{O as default};
+import{_ as i}from"./plugin-vue_export-helper.21dcd24c.js";import{r,o as p,c as s,a as e,b as o,e as a,d as n}from"./app.615e41d8.js";const l={},h=a('<h1 id="\u84DD\u6865\u676F\u5B66\u4E60\u8DEF\u7EBF-\u5EFA\u8BAE\u6536\u85CF" tabindex="-1"><a class="header-anchor" href="#\u84DD\u6865\u676F\u5B66\u4E60\u8DEF\u7EBF-\u5EFA\u8BAE\u6536\u85CF" aria-hidden="true">#</a> 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src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongzhonghao.png" alt="\u626B\u7801\u5173\u6CE8\u540E\u56DE\u590D\u300C\u84DD\u6865\u676F\u300D\u5173\u952E\u5B57"></p><h3 id="\u{1F31E}\u4E00\u3001\u84DD\u6865\u676F\u5230\u5E95\u662F\u4EC0\u4E48" tabindex="-1"><a class="header-anchor" href="#\u{1F31E}\u4E00\u3001\u84DD\u6865\u676F\u5230\u5E95\u662F\u4EC0\u4E48" aria-hidden="true">#</a> \u{1F31E}\u4E00\u3001\u84DD\u6865\u676F\u5230\u5E95\u662F\u4EC0\u4E48?</h3><p><strong>\u84DD\u6865\u676F\u5168\u56FD\u8F6F\u4EF6\u548C\u4FE1\u606F\u6280\u672F\u4E13\u4E1A\u4EBA\u624D\u5927\u8D5B\uFF0C\u662F\u7531\u5DE5\u4E1A\u548C\u4FE1\u606F\u5316\u90E8\u4EBA\u624D\u4EA4\u6D41\u4E2D\u5FC3\u4E3E\u529E\u7684\u5168\u56FD\u6027IT\u5B66\u79D1\u8D5B\u4E8B</strong>\u3002\u5168\u56FD1200\u4F59\u6240\u9AD8\u6821\u53C2\u8D5B\uFF0C\u7D2F\u8BA1\u53C2\u8D5B\u4EBA\u6570\u8D85\u8FC740\u4E07\u4EBA\u3002\u84DD\u6865\u676F\u5927\u8D5B\u8FDE\u7EED\u4E24\u5E74\u88AB\u5217\u5165\u4E2D\u56FD\u9AD8\u7B49\u6559\u80B2\u5B66\u4F1A\u53D1\u5E03\u7684\u201C\u5168\u56FD\u666E\u901A\u9AD8\u6821\u5B66\u79D1\u7ADE\u8D5B\u6392\u884C\u699C\u201D\uFF0C\u662F\u9AD8\u6821\u6559\u80B2\u6559\u5B66\u6539\u9769\u548C\u521B\u65B0\u4EBA\u624D\u57F9\u517B\u7684\u91CD\u8981\u7ADE\u8D5B\u9879\u76EE\u3002\u5BF9\u5927\u5B66\u751F\u7EFC\u5408\u8BC4\u6D4B\uFF0C\u5956\u5B66\u91D1\u8BC4\u5B9A\uFF0C\u5347\u5B66\u8003\u7814\u90FD\u6709\u4E00\u5B9A\u52A9\u76CA\u3002</p><p>\u84DD\u6865\u676F\u5927\u8D5B\u5171\u5305\u62EC\u4E09\u4E2A\u7ADE\u8D5B\u7EC4\u522B\uFF1A</p><ul><li>\u4E2A\u4EBA\u8D5B-\u8F6F\u4EF6\u7C7B</li><li>\u4E2A\u4EBA\u8D5B-\u7535\u5B50\u7C7B</li><li>\u89C6\u89C9\u827A\u672F\u5927\u8D5B</li></ul><p>\u5176\u4E2D\u4E2A\u4EBA\u8D5B-\u8F6F\u4EF6\u7C7B\u7684\u6BD4\u8D5B\u79D1\u76EE\u5305\u62ECC/C++\u7A0B\u5E8F\u8BBE\u8BA1\u3001Java\u8F6F\u4EF6\u5F00\u53D1\u3001Python\u7A0B\u5E8F\u8BBE\u8BA1\u3002</p><p>\u9644\u4E0A\u84DD\u6865\u676F\u5B98\u7F51\u5730\u5740\uFF1A\u84DD\u6865\u676F\u5B98\u7F51\uFF08\u4E2A\u4EBA\u62A5\u540D\u901A\u9053\u5373\u5C06\u5F00\u542F\uFF0C\u770B\u5B8C\u8FD9\u7BC7\u6587\u7AE0\u8D76\u5FEB\u53BB\u62A5\u540D\u5427\uFF09</p>',10),c={href:"https://dasai.lanqiao.cn/",target:"_blank",rel:"noopener 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\u6709\u7740\u4E0D\u5C0F\u7684\u4F18\u52BF\u4E86\u3002</p><p><strong>\u{1F34B}\u7B2C\u56DB\u3001\u516C\u53F8\u5BF9\u7B97\u6CD5\u7684\u80FD\u529B\u8981\u6C42\u8D8A\u6765\u8D8A\u9AD8</strong></p><p>\u73B0\u5728\u6574\u4E2Ait\u884C\u4E1A\u7684\u516C\u53F8\u65E0\u8BBA\u662F\u5927\u5382\u8FD8\u662F\u5C0F\u5382\uFF0C\u65E0\u8BBA\u662F\u6821\u62DB\u8FD8\u662F\u793E\u62DB\uFF0C\u5BF9\u7B97\u6CD5\u7684\u8003\u5DEE\u90FD\u662F\u5FC5\u987B\u7684\u3002\u5BF9\u4E8E\u5927\u5382\u6765\u8BF4\uFF0C\u4F60\u7684\u7B97\u6CD5\u4E0D\u8FC7\u5173\uFF0C\u4E0D\u597D\u610F\u601D\u6211\u4EEC\u4E0D\u8981\u4F60\u3002\u5BF9\u4E8E\u5C0F\u5382\u6765\u8BF4\uFF0C\u4F60\u7684\u7B97\u6CD5\u4E0D\u8FC7\u5173\uFF0C\u5BF9\u4E0D\u8D77\u6211\u4EEC\u4E0D\u80FD\u7ED9\u4F60\u66F4\u9AD8\u7684\u804C\u4F4D\u548C\u85AA\u8D44\u3002</p><p>\u6240\u4EE5\u5728\u6211\u4EEC\u51C6\u5907\u84DD\u6865\u676F\u7684\u8FC7\u7A0B\u5B66\u4E60\u7B97\u6CD5\u7684\u8FC7\u7A0B\uFF0C\u540C\u65F6\u4E5F\u662F\u4E3A\u4E86\u6211\u4EEC\u672A\u6765\u5C31\u4E1A\u505A\u51C6\u5907\u3002\u53EF\u4EE5\u8BF4\uFF0C\u7B97\u6CD5\u80FD\u529B\u51B3\u5B9A\u4E86\u4F60\u7684\u94B1\u9014\u548C\u524D\u9014\u3002\u60F3\u8981\u5728\u672A\u6765\u62FF\u4E2A\u597Doffer\uFF0C\u53C2\u52A0\u84DD\u6865\u676F\u6B63\u662F\u4F60\u4E0D\u53EF\u6216\u7F3A\u7684\u3002</p><h3 id="\u{1F31E}\u4E09\u3001\u73B0\u57280\u57FA\u7840\u53C2\u52A0\u8FD8\u6765\u5F97\u53CA\u5417" tabindex="-1"><a class="header-anchor" href="#\u{1F31E}\u4E09\u3001\u73B0\u57280\u57FA\u7840\u53C2\u52A0\u8FD8\u6765\u5F97\u53CA\u5417" aria-hidden="true">#</a> \u{1F31E}\u4E09\u3001\u73B0\u57280\u57FA\u7840\u53C2\u52A0\u8FD8\u6765\u5F97\u53CA\u5417?</h3><p>\u73B0\u5728\u53C2\u52A0\u4E00\u70B9\u90FD\u4E0D\u665A\u3002</p><p>\u84DD\u6865\u676F\u73B0\u5728\u53EA\u662F\u5904\u5728\u62A5\u540D\u9636\u6BB5\uFF0C\u5B83\u771F\u6B63\u6BD4\u8D5B\u7684\u65E5\u671F\u8981\u5728\u660E\u5E74\u56DB\u6708\u4EFD\u5DE6\u53F3\u3002\u4E0D\u4E25\u683C\u610F\u4E49\u7684\u6765\u7B97\uFF0C\u4F60\u751A\u81F3\u8FD8\u6709\u534A\u5E74\u7684\u65F6\u95F4\u53BB\u5B66\u4E60\u548C\u51C6\u5907\u3002</p><p><strong>\u4EFB\u4F55\u4E8B\u60C5\u80FD\u591F\u575A\u6301\u534A\u5E74\uFF0C\u90FD\u80FD\u4E3A\u4E00\u4E2A\u4EBA\u5E26\u6765\u5DE8\u5927\u7684\u8715\u53D8</strong>\u3002\u53EA\u8981\u4F60\u6BCF\u5468\u80FD\u62FF\u51FA\u4E00\u70B9\u65F6\u95F4\u5B66\u4E60\u7B97\u6CD5\uFF0C\u6301\u4E4B\u4EE5\u6052\uFF0C\u6B63\u6240\u8C13\u58EB\u522B\u4E09\u65E5\u8FD8\u5C06\u522E\u76EE\u60F3\u770B\uFF0C\u534A\u5E74\u7684\u5B66\u4E60\uFF0C\u5B8C\u5168\u80FD\u8BA9\u4F60\u6210\u529F\u6210\u4E3A\u4E00\u4E2A\u7B97\u6CD5\u5C0F\u5C06\uFF0C\u751A\u81F3\u66F4\u52A0\u4F18\u79C0\u3002</p><h3 id="\u{1F31E}\u56DB\u3001\u84DD\u6865\u676F\u8003\u7684\u662F\u4EC0\u4E48-\u96BE\u5417-\u548Cacm\u6709\u4EC0\u4E48\u533A\u522B" tabindex="-1"><a class="header-anchor" href="#\u{1F31E}\u56DB\u3001\u84DD\u6865\u676F\u8003\u7684\u662F\u4EC0\u4E48-\u96BE\u5417-\u548Cacm\u6709\u4EC0\u4E48\u533A\u522B" aria-hidden="true">#</a> \u{1F31E}\u56DB\u3001\u84DD\u6865\u676F\u8003\u7684\u662F\u4EC0\u4E48?\u96BE\u5417\uFF1F\u548CACM\u6709\u4EC0\u4E48\u533A\u522B\uFF1F</h3><p>\u84DD\u6865\u676F\u7684\u7701\u8D5B\u6709\u5341\u9053\u9898\uFF0C\u56DB\u4E2A\u5C0F\u65F6\u7684\u65F6\u95F4\u3002\u9898\u76EE\u6709\u586B\u7A7A\u9898\u548C\u7F16\u7A0B\u9898\uFF0C\u586B\u7A7A\u9898\u53EA\u8981\u4F60\u7684\u7B54\u6848\u6B63\u786E\u5373\u53EF\u5F97\u5206\uFF0C\u7F16\u7A0B\u9898\u5373\u4F7F\u4F60\u7684\u7B54\u6848\u4E0D\u5BF9\uFF0C\u4E5F\u53EF\u4EE5\u6309\u6B65\u9AA4\u5F97\u5206\uFF0C\u53EF\u4EE5\u8BF4\u975E\u5E38\u7684\u4EBA\u6027\u5316\u3002</p><p>\u5B83\u4E0D\u540C\u4E8EACM\u7684ACM\u56E2\u961F\u8D5B\u5236\uFF0CACM\u9898\u76EE\u662F\u82F1\u8BED\u7684\uFF0C\u5FC5\u987B\u8FD0\u884C\u7684\u7ED3\u679C\u6B63\u786E\u624D\u53EF\u5F97\u5206\u3002ACM\u7684\u9898\u76EE\u8981\u66F4\u52A0\u96BE\uFF0C\u8003\u5BDF\u7684\u66F4\u591A\u662F\u4EBA\u7684\u601D\u7EF4\u80FD\u529B\uFF0C\u4E5F\u53EF\u4EE5\u8BF4\u662F\u5929\u8D4B\uFF0C\u5B83\u5E76\u4E0D\u9002\u5408\u5927\u90E8\u5206\u4EBA\u53BB\u53C2\u52A0\uFF0C\u800C\u4E14\u9700\u8981\u4ED8\u51FA\u7684\u65F6\u95F4\u4E5F\u66F4\u591A\u3002</p><p>\u800C\u84DD\u6865\u676F\u7684\u9898\u76EE\u867D\u7136\u79F0\u4E0D\u4E0A\u662F\u975E\u5E38\u96BE\uFF0C\u4F46\u4E5F\u5E76\u975E\u4EBA\u4EBA\u90FD\u80FD\u4F1A\u7684\u3002\u4F46\u4F60\u5982\u679C\u80AF\u82B1\u4E00\u4E9B\u65F6\u95F4\u53BB\u5B66\u4E60\uFF0C\u90A3\u5B83\u7ED9\u4F60\u7684\u7ED3\u679C\u4E5F\u80AF\u5B9A\u4E0D\u4F1A\u8BA9\u4F60\u5931\u671B\u3002\u5B83\u7684\u9898\u578B\u6BD4\u8F83\u5355\u4E00\uFF0C\u66F4\u591A\u7684\u662F\u8003\u5DEE\u5B66\u4E60\u638C\u63E1\u4E86\u54EA\u4E9B\u7B97\u6CD5\u80FD\u529B\u3002<strong>\u84DD\u6865\u676F\u7684\u9898\u578B\u66F4\u559C\u6B22\u8003\u66B4\u529B\u3001\u679A\u4E3E\u3001\u52A8\u89C4\u7B49\u95EE\u9898</strong>\u3002</p><h3 id="\u{1F31E}\u4E94\u3001\u5907\u6218\u84DD\u6865\u7684\u5B66\u4E60\u8DEF\u7EBF\u548C\u5237\u9898\u7F51\u7AD9" tabindex="-1"><a class="header-anchor" href="#\u{1F31E}\u4E94\u3001\u5907\u6218\u84DD\u6865\u7684\u5B66\u4E60\u8DEF\u7EBF\u548C\u5237\u9898\u7F51\u7AD9" aria-hidden="true">#</a> \u{1F31E}\u4E94\u3001\u5907\u6218\u84DD\u6865\u7684\u5B66\u4E60\u8DEF\u7EBF\u548C\u5237\u9898\u7F51\u7AD9</h3><p>\u5982\u679C\u4F60\u662FC/C++\u7684\u9009\u624B\uFF0C\u90A3\u6211\u529D\u4F60\u4E00\u5B9A\u8981\u8BA4\u771F\u5B66\u597D\u6240\u6709\u7684\u57FA\u7840\u7B97\u6CD5\u3002C\u548CC++\u90FD\u662F\u975E\u5E38\u9002\u5408\u7528\u6765\u5199\u7B97\u6CD5\u7684\u8BED\u8A00\uFF0C\u6240\u4EE5\u8FD9\u4E2A\u7EC4\u522B\u7684\u9009\u624B\u5927\u591A\u90FD\u662F\u6709\u4E00\u5B9A\u7684\u5B9E\u529B\u7684\uFF0C\u5982\u679C\u4F60\u60F3\u6765\u6DF7\u53EF\u80FD\u88AB\u5403\u7684\u6E23\u90FD\u4E0D\u5269\u3002\u5F53\u7136\u5176\u4ED6\u4E24\u7EC4\u9009\u624B\u4E5F\u975E\u5E38\u591A\uFF0C\u6240\u4EE5\u4E5F\u9700\u8981\u8BA4\u771F\u53BB\u590D\u4E60\uFF0C\u5148\u770B\u770B\u6211\u5F52\u7EB3\u7684\u5B66\u4E60\u8DEF\u7EBF\u56FE\u3002</p><p><img src="https://upload-images.jianshu.io/upload_images/1179389-267796e602b75052.png?imageMogr2/auto-orient/strip|imageView2/2/w/1240" alt=""></p><p>\u4E0D\u8981\u4E00\u4E0B\u89C9\u5F97\u5F88\u591A\uFF0C\u5F88\u591A\u90FD\u662F\u5728\u5B66\u6821\u7684\u8BFE\u7A0B\u4E2D\u5B66\u5230\u8FC7\u7684\uFF0C\u800C\u4E14\u4F60\u8FD8\u6709\u534A\u5E74\u7684\u65F6\u95F4\uFF0C\u60F3\u8981\u638C\u63E1\u8FD9\u91CC\u9762\u7684\u5927\u90E8\u5206\u7B97\u6CD5\u5B8C\u5168\u65F6\u95F4\u7EF0\u7EF0\u6709\u4F59\u3002\u5F53\u7136\u4E5F\u4E3A\u5927\u5BB6\u63A8\u8350\u4E86\u4E00\u4E9B\u597D\u7684\u5B66\u4E60\u7B97\u6CD5\u548C\u6570\u636E\u7ED3\u6784\u7684\u7F51\u7AD9</p><p>\u529B\u6263\uFF08yyds\uFF09\uFF1A</p>',35),_={href:"https://leetcode-cn.com/",target:"_blank",rel:"noopener noreferrer"},u=n("https://leetcode-cn.com/"),b=e("p",null,"\u725B\u5BA2\u7F51\uFF08\u540C\u6837\u7ECF\u5178\u7684\u5237\u9898\u7F51\u7AD9\uFF09\uFF1A",-1),m={href:"https://www.nowcoder.com/activity/oj?tab=1",target:"_blank",rel:"noopener noreferrer"},f=n("https://www.nowcoder.com/activity/oj?tab=1"),w=e("p",null,"PTA\uFF08\u9002\u5408\u5C0F\u767D\uFF09\uFF1A",-1),k={href:"https://pintia.cn/",target:"_blank",rel:"noopener noreferrer"},v=n("https://pintia.cn/"),q=e("p",null,"VisuAlgo \u6570\u636E\u7ED3\u6784\u548C\u7B97\u6CD5\u52A8\u6001\u53EF\u89C6\u5316\uFF08\u5B66\u4E60\u6570\u636E\u7ED3\u6784\u7684\u795E\u5668\uFF09\uFF1A",-1),x={href:"https://visualgo.net/zh",target:"_blank",rel:"noopener noreferrer"},C=n("https://visualgo.net/zh"),V=e("p",null,"\u84DD\u6865\u4E91\u8BFE\uFF08\u84DD\u6865\u676F\u5B98\u65B9\u5B66\u4E60\u7F51\u7AD9\uFF09\uFF1A",-1),j={href:"https://www.lanqiao.cn/",target:"_blank",rel:"noopener noreferrer"},A=n("https://www.lanqiao.cn/"),M=e("p",null,"\u5F53\u7136\u522B\u5FD8\u8BB0\u4E86\u54D4\u54E9\u54D4\u54E9\u5927\u5B66\uFF0C\u91CC\u9762\u4E5F\u6709\u975E\u5E38\u4F18\u79C0\u7684\u8D44\u6E90\uFF0C\u4E0B\u9762\u5411\u5927\u5BB6\u63A8\u8350\u51E0\u4E2A\u6211\u81EA\u5DF1\u5B66\u4E60\u8FC7\u7684\uFF1A",-1),B=e("p",null,"\u56FE\u7075\u6570\u636E\u7ED3\u6784\u4E0E\u7B97\u6CD5\uFF1A",-1),y=e("p",null,[e("img",{src:"https://upload-images.jianshu.io/upload_images/1179389-1f0e23da66059bd3.png?imageMogr2/auto-orient/strip|imageView2/2/w/1240",alt:""})],-1),E={href:"https://www.bilibili.com/video/BV1a54y1b74k",target:"_blank",rel:"noopener noreferrer"},z=n("https://www.bilibili.com/video/BV1a54y1b74k"),J=e("p",null,"\u53EF\u80FD\u662F\u6700\u597D\u7684Java\u6570\u636E\u7ED3\u6784\u6559\u7A0B\uFF1A",-1),N=e("p",null,[e("img",{src:"https://upload-images.jianshu.io/upload_images/1179389-589bf36b1ec3191d.png?imageMogr2/auto-orient/strip|imageView2/2/w/1240",alt:""})],-1),T={href:"https://www.bilibili.com/video/BV1iJ411E7xW",target:"_blank",rel:"noopener noreferrer"},I=n("https://www.bilibili.com/video/BV1iJ411E7xW"),L=e("p",null,"\u8FD8\u6709 C \u7AD9\u4E0A\u6700\u5F3A\u7684\u7B97\u6CD5\u5927\u4F6C\uFF0C\u82F1\u96C4\u54EA\u91CC\u51FA\u6765\u3002",-1),P={href:"https://blog.csdn.net/whereisherofrom",target:"_blank",rel:"noopener noreferrer"},W=n("https://blog.csdn.net/whereisherofrom"),S=a('<p>\u5927\u4F6C\u7684\u6587\u7AE0\u8BB2\u89E3\u4E86\u5404\u79CD\u4ECE\u6613\u5230\u96BE\u7684\u7B97\u6CD5\uFF0C\u800C\u4E14\u8BB2\u7684\u975E\u5E38\u900F\u5F7B\u3002</p><h3 id="\u{1F31E}\u516D\u3001\u5982\u4F55\u6B63\u786E\u7684\u5237\u9898" tabindex="-1"><a class="header-anchor" href="#\u{1F31E}\u516D\u3001\u5982\u4F55\u6B63\u786E\u7684\u5237\u9898" aria-hidden="true">#</a> \u{1F31E}\u516D\u3001\u5982\u4F55\u6B63\u786E\u7684\u5237\u9898\uFF1F</h3><p>\u8FD9\u91CC\u6211\u7ED3\u5408\u81EA\u8EAB\u5237\u9898\u7684\u7ECF\u9A8C\u548C\u4E00\u4E9B\u535A\u4E3B\u7684\u63A8\u8350\u5411\u5927\u5BB6\u63A8\u8350\u4E00\u4E0B\uFF0C\u5982\u679C\u4F60\u662F\u96F6\u57FA\u7840\u6216\u8005\u57FA\u7840\u4E0D\u597D\u7684\uFF0C\u6BCF\u6B21\u53EA\u662F\u95F2\u7740\u65E0\u804A\u624D\u5750\u4E00\u4E24\u9898\uFF0C\u73B0\u5728\u60F3\u7CFB\u7EDF\u7684\u5B66\u4E60\u7B97\u6CD5\u3002\u6211\u63A8\u8350\u4F60\u5148\u53BB\u529B\u6263\u7F51\u7AD9\u3002</p><p><img src="https://img-blog.csdnimg.cn/40f236b195004f738e89a1c6277947ac.png" alt=""></p><p>\u5728\u8FD9\u9009\u62E9\u96BE\u5EA6\u7B80\u5355\uFF0C\u7136\u540E\u6311\u4E00\u4E9B\u9898\u89E3\u91CF\u9AD8\uFF0C\u901A\u8FC7\u7387\u9AD8\u7684\u9898\u76EE\u8BD5\u8BD5\u6C34\u3002\u8FD9\u7C7B\u9898\u76EE\u57FA\u672C\u6BD4\u8F83\u7B80\u5355\uFF0C\u4E0D\u4F1A\u6D89\u53CA\u5230\u4EC0\u4E48\u7B97\u6CD5\uFF0C\u6BCF\u6B21\u63D0\u4EA4\u6210\u529F\u90FD\u53EF\u4EE5\u6FC0\u53D1\u4F60\u5B66\u4E60\u7B97\u6CD5\u7684\u5174\u8DA3\u3002</p><p>\u5373\u4F7F\u505A\u4E0D\u51FA\u6765\u91CC\u9762\u4E5F\u6709\u8BB8\u591A\u5927\u4F6C\u7684\u9898\u89E3\u4E94\u82B1\u516B\u95E8\uFF0C\u8BA9\u4F60\u4EEC\u4E00\u773C\u770B\u61C2\u4ED6\u4EEC\u7684\u795E\u5947\u601D\u8DEF\u3002\u6709\u7684\u4EBA\u603B\u662F\u597D\u9AD8\u9A9B\u8FDC\uFF0C\u5165\u95E8\u5C31\u53BB\u5B66\u4EC0\u4E48\u8D2A\u5FC3\u52A8\u6001\uFF0C\u4E00\u9053\u9898\u770B\u4E24\u4E09\u4E2A\u949F\u5934\uFF0C\u7ED3\u679C\u6700\u540E\u9898\u89E3\u90FD\u770B\u4E0D\u61C2\uFF0C\u8FD9\u662F\u5B66\u4E60\u7B97\u6CD5\u7684\u5927\u5FCC\u3002</p><p>\u7B49\u4F60\u8BD5\u6C34\u5B8C\u6BD5\u6709\u4E86\u4E00\u5B9A\u505A\u9898\u7ECF\u9A8C\u540E\uFF0C\u6211\u63A8\u8350\u4F60\u53BB\u53C2\u52A0\u529B\u6263\u7684\u5B66\u4E60\u8BA1\u5212\u4E13\u680F\uFF0C\u8FD9\u4E9B\u90FD\u662F\u514D\u8D39\u7684\uFF0C\u4ECE\u53CC\u6307\u9488\u5230\u52A8\u89C4\u548C\u6570\u636E\u7ED3\u6784\u90FD\u6709\uFF0C\u53EF\u4EE5\u5E2E\u4F60\u4E00\u6B65\u4E00\u6B65\u5E2E\u4F60\u8BAD\u7EC3\u51FA\u4F18\u79C0\u7684\u7B97\u6CD5\u80FD\u529B\u3002</p><p><img src="https://img-blog.csdnimg.cn/3e2c94a9bed44193a6e18c2d6a0df7a6.png" alt=""></p><p><strong>\u5237\u9898\u4E5F\u5343\u4E07\u4E0D\u8981\u5FD8\u8BB0\u5F52\u7EB3\u603B\u7ED3</strong>\uFF01\uFF01\uFF01</p><p>\u5237\u9898\u5E76\u4E0D\u662F\u5237\u5B8C\u5C31\u8FC7\u4E86\u5373\u53EF\uFF0C\u9898\u76EE\u5728\u53D8\u5316\uFF0C\u4F46\u9898\u578B\u6C38\u8FDC\u5C31\u90A3\u4E48\u4E00\u4E9B\u3002\u53EA\u6709\u5F52\u7EB3\u51FA\u5C5E\u4E8E\u81EA\u5DF1\u7684\u4E00\u5957\u7B14\u8BB0\uFF0C\u624D\u80FD\u505A\u9898\u8D8A\u6765\u8D8A\u5F97\u5FC3\u5E94\u624B\u3002\u5C06\u8003\u70B9\u76F8\u540C\u7684\u7B97\u6CD5\u70B9\u603B\u7ED3\uFF0C\u518D\u53BB\u5BFB\u627E\u7C7B\u4F3C\u7684\u7B97\u6CD5\u9898\u770B\u80FD\u5426\u505A\u51FA\u6765\u68C0\u9A8C\u81EA\u5DF1\uFF0C\u8FD9\u6837\u624D\u80FD\u641E\u660E\u767D\u81EA\u5DF1\u662F\u5426\u771F\u7684\u5B66\u4F1A\u4E86\u8FD9\u4E2A\u7B97\u6CD5\u3002</p><p>\u6211\u4E3A\u5927\u5BB6\u63A8\u8350\u7684\u662F\u6211\u81EA\u5DF1\u5E38\u7528\u7684\u7B14\u8BB0\u8F6F\u4EF6\u8BED\u96C0\uFF0C\u8D34\u4E0A\u90E8\u5206\u6211\u505A\u7684\u7B14\u8BB0\uFF0C\u53EF\u4EE5\u76F4\u63A5\u8D34\u56FE\u975E\u5E38\u65B9\u4FBF\u3002\u5F53\u7136\u8FD8\u6709\u6709\u9053\u4E91\u7B14\u8BB0\uFF0CTypora\u7B49\u7B49\u90FD\u975E\u5E38\u4E0D\u9519\u3002</p><p><img src="https://img-blog.csdnimg.cn/9881f0d441514f9e9de5d7da3f7aa4e8.png" alt=""></p><h3 id="\u{1F31E}\u4E03\u3001\u84DD\u6865\u5E74\u771F\u9898\u8D44\u6E90-\u914D\u5957\u8003\u8BD5\u73AF\u5883" tabindex="-1"><a class="header-anchor" href="#\u{1F31E}\u4E03\u3001\u84DD\u6865\u5E74\u771F\u9898\u8D44\u6E90-\u914D\u5957\u8003\u8BD5\u73AF\u5883" aria-hidden="true">#</a> \u{1F31E}\u4E03\u3001\u84DD\u6865\u5E74\u771F\u9898\u8D44\u6E90+\u914D\u5957\u8003\u8BD5\u73AF\u5883</h3><p><img src="https://upload-images.jianshu.io/upload_images/1179389-966a1b1b2b82e154.png?imageMogr2/auto-orient/strip|imageView2/2/w/1240" alt=""></p><p>\u8D39\u4E86\u4E5D\u725B\u4E8C\u864E\u4E4B\u529B\uFF0C\u7EC8\u4E8E\u641E\u5230\u4E86\u8FD9\u4E9B\u5173\u4E8E\u84DD\u6865\u676F\u7684\u5B66\u4E60\u8D44\u6599\uFF0C\u5982\u679C\u80FD\u8BA4\u771F\u5237\u5B8C\uFF0C\u60F3\u8F93\u5F88\u96BE\u7684\uFF0C\u60F3\u4EA4\u5B66\u8D39\u5F88\u96BE\u7684\u2014\u2014\u59A5\u59A5\u5730\u8D62\u56DE\u6765\u3002</p><p><strong>\u600E\u4E48\u83B7\u53D6\u5462\uFF1F</strong></p><p>\u7531\u4E8E\u8D44\u6599\u975E\u5E38\u5BB9\u6613\u88AB\u6CB3\u87F9\uFF0C\u9700\u8981\u7684\u5C0F\u4F19\u4F34\u53EF\u4EE5\u957F\u6309\u8BC6\u522B/\u626B\u63CF\u5173\u6CE8\u516C\u4F17\u53F7\u300C<strong>\u6C89\u9ED8\u738B\u4E8C</strong>\u300D\uFF0C\u56DE\u590D\u5173\u952E\u5B57\u300C<strong>\u84DD\u6865\u676F</strong>\u300D\u5373\u53EF\u83B7\u53D6\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongzhonghao.png" alt="\u626B\u7801\u5173\u6CE8\u540E\u56DE\u590D\u300C\u84DD\u6865\u676F\u300D\u5173\u952E\u5B57"></p>',18);function D(F,G){const t=r("ExternalLinkIcon");return p(),s("div",null,[h,e("blockquote",null,[e("p",null,[e("a",c,[d,o(t)])])]),g,e("blockquote",null,[e("p",null,[e("a",_,[u,o(t)])])]),b,e("blockquote",null,[e("p",null,[e("a",m,[f,o(t)])])]),w,e("blockquote",null,[e("p",null,[e("a",k,[v,o(t)])])]),q,e("blockquote",null,[e("p",null,[e("a",x,[C,o(t)])])]),V,e("blockquote",null,[e("p",null,[e("a",j,[A,o(t)])])]),M,B,y,e("blockquote",null,[e("p",null,[e("a",E,[z,o(t)])])]),J,N,e("blockquote",null,[e("p",null,[e("a",T,[I,o(t)])])]),L,e("blockquote",null,[e("p",null,[e("a",P,[W,o(t)])])]),S])}var O=i(l,[["render",D],["__file","lanqiaobei.html.vue"]]);export{O as default};
diff --git a/dist/assets/learn-jianyi.html.453bb02b.js b/dist/assets/learn-jianyi.html.2486d715.js
similarity index 88%
rename from dist/assets/learn-jianyi.html.453bb02b.js
rename to dist/assets/learn-jianyi.html.2486d715.js
index 1f989ac7..a5955ec2 100644
--- a/dist/assets/learn-jianyi.html.453bb02b.js
+++ b/dist/assets/learn-jianyi.html.2486d715.js
@@ -1 +1 @@
-import{_ as i}from"./plugin-vue_export-helper.21dcd24c.js";import{r as l,o as r,c as s,a as e,b as o,w as a,d as t}from"./app.a0271b9c.js";const c={},_=e("h1",{id:"\u5B66\u4E60\u5EFA\u8BAE",tabindex:"-1"},[e("a",{class:"header-anchor",href:"#\u5B66\u4E60\u5EFA\u8BAE","aria-hidden":"true"},"#"),t(" \u5B66\u4E60\u5EFA\u8BAE")],-1),d=e("blockquote",null,[e("p",null,"\u4E0D\u77E5\u9053\u5B66\u4EC0\u4E48\uFF1F\u4E0D\u77E5\u9053\u8BE5\u600E\u4E48\u5B66\uFF1F\u7B54\u6848\u90FD\u5728\u8FD9\u91CC\u3002")],-1),u=t("\u5982\u4F55\u9605\u8BFB\u300A\u6DF1\u5165\u7406\u89E3\u8BA1\u7B97\u673A\u7CFB\u7EDF\u300B\u8FD9\u672C\u4E66\uFF1F"),h=t("\u7535\u5B50\u4FE1\u606F\u5DE5\u7A0B\u6700\u597D\u7684\u51FA\u8DEF\u7684\u662F\u4EC0\u4E48\uFF1F");function m(f,p){const n=l("RouterLink");return r(),s("div",null,[_,d,e("ul",null,[e("li",null,[o(n,{to:"/xuexijianyi/read-csapp.html"},{default:a(()=>[u]),_:1})]),e("li",null,[o(n,{to:"/xuexijianyi/electron-information-engineering.html"},{default:a(()=>[h]),_:1})])])])}var v=i(c,[["render",m],["__file","learn-jianyi.html.vue"]]);export{v as default};
+import{_ as i}from"./plugin-vue_export-helper.21dcd24c.js";import{r as l,o as r,c as s,a as e,b as o,w as a,d as t}from"./app.615e41d8.js";const c={},_=e("h1",{id:"\u5B66\u4E60\u5EFA\u8BAE",tabindex:"-1"},[e("a",{class:"header-anchor",href:"#\u5B66\u4E60\u5EFA\u8BAE","aria-hidden":"true"},"#"),t(" \u5B66\u4E60\u5EFA\u8BAE")],-1),d=e("blockquote",null,[e("p",null,"\u4E0D\u77E5\u9053\u5B66\u4EC0\u4E48\uFF1F\u4E0D\u77E5\u9053\u8BE5\u600E\u4E48\u5B66\uFF1F\u7B54\u6848\u90FD\u5728\u8FD9\u91CC\u3002")],-1),u=t("\u5982\u4F55\u9605\u8BFB\u300A\u6DF1\u5165\u7406\u89E3\u8BA1\u7B97\u673A\u7CFB\u7EDF\u300B\u8FD9\u672C\u4E66\uFF1F"),h=t("\u7535\u5B50\u4FE1\u606F\u5DE5\u7A0B\u6700\u597D\u7684\u51FA\u8DEF\u7684\u662F\u4EC0\u4E48\uFF1F");function m(f,p){const n=l("RouterLink");return r(),s("div",null,[_,d,e("ul",null,[e("li",null,[o(n,{to:"/xuexijianyi/read-csapp.html"},{default:a(()=>[u]),_:1})]),e("li",null,[o(n,{to:"/xuexijianyi/electron-information-engineering.html"},{default:a(()=>[h]),_:1})])])])}var v=i(c,[["render",m],["__file","learn-jianyi.html.vue"]]);export{v as default};
diff --git a/dist/assets/linkedlist.html.4b75cd4d.js b/dist/assets/linkedlist.html.e021186b.js
similarity index 99%
rename from dist/assets/linkedlist.html.4b75cd4d.js
rename to dist/assets/linkedlist.html.e021186b.js
index 37d68089..f6c3e659 100644
--- a/dist/assets/linkedlist.html.4b75cd4d.js
+++ b/dist/assets/linkedlist.html.e021186b.js
@@ -1,4 +1,4 @@
-import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e as p}from"./app.a0271b9c.js";const e={},t=p(`<h1 id="java\u96C6\u5408linkedlist\u8BE6\u89E3" tabindex="-1"><a class="header-anchor" href="#java\u96C6\u5408linkedlist\u8BE6\u89E3" aria-hidden="true">#</a> Java\u96C6\u5408LinkedList\u8BE6\u89E3</h1><h3 id="\u4E00\u3001linkedlist-\u7684\u5256\u767D" tabindex="-1"><a class="header-anchor" href="#\u4E00\u3001linkedlist-\u7684\u5256\u767D" aria-hidden="true">#</a> \u4E00\u3001LinkedList \u7684\u5256\u767D</h3><p>\u5927\u5BB6\u597D\uFF0C\u6211\u662F LinkedList\uFF0C\u548C ArrayList \u662F\u540C\u95E8\u5E08\u5144\u5F1F\uFF0C\u4F46\u6211\u4FE9\u7EC3\u7684\u5185\u529F\u5374\u5B8C\u5168\u4E0D\u540C\u3002\u5E08\u5144\u7EC3\u7684\u662F\u52A8\u6001\u6570\u7EC4\uFF0C\u6211\u7EC3\u7684\u662F\u94FE\u8868\u3002</p><p>\u95EE\u5927\u5BB6\u4E00\u4E2A\u95EE\u9898\uFF0C\u77E5\u9053\u6211\u4E3A\u4EC0\u4E48\u8981\u7EC3\u94FE\u8868\u8FD9\u95E8\u5185\u529F\u5417\uFF1F</p><p>\u4E3E\u4E2A\u4F8B\u5B50\u6765\u8BB2\u5427\uFF0C\u5047\u5982\u4F60\u4EEC\u624B\u5934\u8981\u7BA1\u7406\u4E00\u63A8\u7968\u636E\uFF0C\u53EF\u80FD\u6709\u4E00\u5F20\uFF0C\u4E5F\u53EF\u80FD\u6709\u4E00\u4EBF\u5F20\u3002</p><p>\u8BE5\u600E\u4E48\u529E\u5462\uFF1F</p><p>\u7533\u8BF7\u4E00\u4E2A 10G \u7684\u5927\u6570\u7EC4\u7B49\u7740\uFF1F\u90A3\u4E07\u4E00\u7968\u636E\u53EA\u6709 100 \u5F20\u5462\uFF1F</p><p>\u7533\u8BF7\u4E00\u4E2A\u9ED8\u8BA4\u5927\u5C0F\u7684\u6570\u7EC4\uFF0C\u968F\u7740\u6570\u636E\u91CF\u7684\u589E\u5927\u6269\u5BB9\uFF1F\u8981\u77E5\u9053\u6269\u5BB9\u662F\u9700\u8981\u91CD\u65B0\u590D\u5236\u6570\u7EC4\u7684\uFF0C\u5F88\u8017\u65F6\u95F4\u3002</p><p>\u5173\u952E\u662F\uFF0C\u6570\u7EC4\u8FD8\u6709\u4E00\u4E2A\u5F0A\u7AEF\u5C31\u662F\uFF0C\u5047\u5982\u73B0\u5728\u6709 500 \u4E07\u5F20\u7968\u636E\uFF0C\u73B0\u5728\u8981\u4ECE\u4E2D\u95F4\u5220\u9664\u4E00\u4E2A\u7968\u636E\uFF0C\u5C31\u9700\u8981\u628A 250 \u4E07\u5F20\u7968\u636E\u5F80\u524D\u79FB\u52A8\u4E00\u683C\u3002</p><p>\u9047\u5230\u8FD9\u79CD\u60C5\u51B5\u7684\u65F6\u5019\uFF0C\u6211\u5E08\u5144\u51E0\u4E4E\u60C5\u7EEA\u5D29\u6E83\uFF0C\u96BE\u53D7\u7684\u8981\u547D\u3002\u5E08\u7236\u4E0D\u5FCD\u5FC3\u770B\u5230\u5E08\u5144\u8FD9\u6837\u75DB\u82E6\uFF0C\u4E8E\u662F\u6253\u6211\u8FDB\u5165\u5E08\u95E8\u90A3\u4E00\u5929\uFF0C\u5C31\u5F3A\u8FEB\u6211\u7EC3\u94FE\u8868\u8FD9\u95E8\u5185\u529F\uFF0C\u4E00\u5F00\u59CB\u6211\u5F88\u4E0D\u7406\u89E3\uFF0C\u5BB3\u6015\u5E08\u7236\u504F\u5FC3\uFF0C\u4E0D\u628A\u5E08\u95E8\u6700\u5389\u5BB3\u7684\u5185\u529F\u6559\u6211\u3002</p><p>\u76F4\u5230\u6709\u4E00\u5929\uFF0C\u6211\u4EB2\u773C\u76EE\u7779\u5E08\u5144\u5DEE\u70B9\u56E0\u4E3A\u79FB\u52A8\u6570\u636E\u800C\u8D70\u706B\u5165\u9B54\uFF0C\u6211\u624D\u660E\u767D\u5E08\u7236\u7684\u826F\u82E6\u7528\u5FC3\u3002\u4ECE\u6B64\u4EE5\u540E\uFF0C\u6211\u82E6\u7EC3\u201C\u94FE\u8868\u201D\u8FD9\u95E8\u5185\u529F\uFF0C\u53D6\u5F97\u4E86\u663E\u8457\u7684\u8FDB\u6B65\uFF0C\u5E08\u7236\u548C\u5E08\u5144\u90FD\u5938\u6211\u6709\u5929\u8D4B\u3002</p><p>\u94FE\u8868\u8FD9\u95E8\u5185\u529F\u5927\u81F4\u5206\u4E3A\u4E09\u4E2A\u5C42\u6B21\uFF1A</p><ul><li>\u7B2C\u4E00\u5C42\u53EB\u505A\u201C\u5355\u5411\u94FE\u8868\u201D\uFF0C\u6211\u53EA\u6709\u4E00\u4E2A\u540E\u6307\u9488\uFF0C\u6307\u5411\u4E0B\u4E00\u4E2A\u6570\u636E\uFF1B</li><li>\u7B2C\u4E8C\u5C42\u53EB\u505A\u201C\u53CC\u5411\u94FE\u8868\u201D\uFF0C\u6211\u6709\u4E24\u4E2A\u6307\u9488\uFF0C\u540E\u6307\u9488\u6307\u5411\u4E0B\u4E00\u4E2A\u6570\u636E\uFF0C\u524D\u6307\u9488\u6307\u5411\u4E0A\u4E00\u4E2A\u6570\u636E\u3002</li><li>\u7B2C\u4E09\u5C42\u53EB\u505A\u201C\u4E8C\u53C9\u6811\u201D\uFF0C\u628A\u540E\u6307\u9488\u53BB\u6389\uFF0C\u6362\u6210\u5DE6\u53F3\u6307\u9488\u3002</li></ul><p>\u4F46\u6211\u73B0\u5728\u7684\u529F\u529B\u8FD8\u8FBE\u4E0D\u5230\u7B2C\u4E09\u5C42\uFF0C\u4E0D\u8FC7\u5E08\u7236\u8BF4\u6211\u6709\u8FD9\u4E2A\u6F5C\u529B\uFF0C\u7EC3\u6210\u795E\u529F\u662F\u65E9\u665A\u7684\u4E8B\u3002</p><h3 id="\u4E8C\u3001linkedlist-\u7684\u5185\u529F\u5FC3\u6CD5" tabindex="-1"><a class="header-anchor" href="#\u4E8C\u3001linkedlist-\u7684\u5185\u529F\u5FC3\u6CD5" aria-hidden="true">#</a> \u4E8C\u3001LinkedList \u7684\u5185\u529F\u5FC3\u6CD5</h3><p>\u597D\u4E86\uFF0C\u7ECF\u8FC7\u6211\u8FD9\u4E48\u6837\u7684\u4E00\u4E2A\u5256\u767D\u540E\uFF0C\u5927\u5BB6\u5BF9\u6211\u5E94\u8BE5\u5DF2\u7ECF\u4E0D\u964C\u751F\u4E86\u3002\u90A3\u4E48\u63A5\u4E0B\u6765\uFF0C\u6211\u7ED9\u5927\u5BB6\u5C55\u793A\u4E00\u4E0B\u6211\u7684\u5185\u529F\u5FC3\u6CD5\u3002</p><p>\u6211\u7684\u5185\u529F\u5FC3\u6CD5\u4E3B\u8981\u662F\u4E00\u4E2A\u79C1\u6709\u7684\u9759\u6001\u5185\u90E8\u7C7B\uFF0C\u53EB Node\uFF0C\u4E5F\u5C31\u662F\u8282\u70B9\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">private</span> <span class="token keyword">static</span> <span class="token keyword">class</span> <span class="token class-name">Node</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">E</span><span class="token punctuation">&gt;</span></span> <span class="token punctuation">{</span>
+import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e as p}from"./app.615e41d8.js";const e={},t=p(`<h1 id="java\u96C6\u5408linkedlist\u8BE6\u89E3" tabindex="-1"><a class="header-anchor" href="#java\u96C6\u5408linkedlist\u8BE6\u89E3" aria-hidden="true">#</a> Java\u96C6\u5408LinkedList\u8BE6\u89E3</h1><h3 id="\u4E00\u3001linkedlist-\u7684\u5256\u767D" tabindex="-1"><a class="header-anchor" href="#\u4E00\u3001linkedlist-\u7684\u5256\u767D" aria-hidden="true">#</a> \u4E00\u3001LinkedList \u7684\u5256\u767D</h3><p>\u5927\u5BB6\u597D\uFF0C\u6211\u662F LinkedList\uFF0C\u548C ArrayList \u662F\u540C\u95E8\u5E08\u5144\u5F1F\uFF0C\u4F46\u6211\u4FE9\u7EC3\u7684\u5185\u529F\u5374\u5B8C\u5168\u4E0D\u540C\u3002\u5E08\u5144\u7EC3\u7684\u662F\u52A8\u6001\u6570\u7EC4\uFF0C\u6211\u7EC3\u7684\u662F\u94FE\u8868\u3002</p><p>\u95EE\u5927\u5BB6\u4E00\u4E2A\u95EE\u9898\uFF0C\u77E5\u9053\u6211\u4E3A\u4EC0\u4E48\u8981\u7EC3\u94FE\u8868\u8FD9\u95E8\u5185\u529F\u5417\uFF1F</p><p>\u4E3E\u4E2A\u4F8B\u5B50\u6765\u8BB2\u5427\uFF0C\u5047\u5982\u4F60\u4EEC\u624B\u5934\u8981\u7BA1\u7406\u4E00\u63A8\u7968\u636E\uFF0C\u53EF\u80FD\u6709\u4E00\u5F20\uFF0C\u4E5F\u53EF\u80FD\u6709\u4E00\u4EBF\u5F20\u3002</p><p>\u8BE5\u600E\u4E48\u529E\u5462\uFF1F</p><p>\u7533\u8BF7\u4E00\u4E2A 10G \u7684\u5927\u6570\u7EC4\u7B49\u7740\uFF1F\u90A3\u4E07\u4E00\u7968\u636E\u53EA\u6709 100 \u5F20\u5462\uFF1F</p><p>\u7533\u8BF7\u4E00\u4E2A\u9ED8\u8BA4\u5927\u5C0F\u7684\u6570\u7EC4\uFF0C\u968F\u7740\u6570\u636E\u91CF\u7684\u589E\u5927\u6269\u5BB9\uFF1F\u8981\u77E5\u9053\u6269\u5BB9\u662F\u9700\u8981\u91CD\u65B0\u590D\u5236\u6570\u7EC4\u7684\uFF0C\u5F88\u8017\u65F6\u95F4\u3002</p><p>\u5173\u952E\u662F\uFF0C\u6570\u7EC4\u8FD8\u6709\u4E00\u4E2A\u5F0A\u7AEF\u5C31\u662F\uFF0C\u5047\u5982\u73B0\u5728\u6709 500 \u4E07\u5F20\u7968\u636E\uFF0C\u73B0\u5728\u8981\u4ECE\u4E2D\u95F4\u5220\u9664\u4E00\u4E2A\u7968\u636E\uFF0C\u5C31\u9700\u8981\u628A 250 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id="\u4E8C\u3001linkedlist-\u7684\u5185\u529F\u5FC3\u6CD5" tabindex="-1"><a class="header-anchor" href="#\u4E8C\u3001linkedlist-\u7684\u5185\u529F\u5FC3\u6CD5" aria-hidden="true">#</a> \u4E8C\u3001LinkedList \u7684\u5185\u529F\u5FC3\u6CD5</h3><p>\u597D\u4E86\uFF0C\u7ECF\u8FC7\u6211\u8FD9\u4E48\u6837\u7684\u4E00\u4E2A\u5256\u767D\u540E\uFF0C\u5927\u5BB6\u5BF9\u6211\u5E94\u8BE5\u5DF2\u7ECF\u4E0D\u964C\u751F\u4E86\u3002\u90A3\u4E48\u63A5\u4E0B\u6765\uFF0C\u6211\u7ED9\u5927\u5BB6\u5C55\u793A\u4E00\u4E0B\u6211\u7684\u5185\u529F\u5FC3\u6CD5\u3002</p><p>\u6211\u7684\u5185\u529F\u5FC3\u6CD5\u4E3B\u8981\u662F\u4E00\u4E2A\u79C1\u6709\u7684\u9759\u6001\u5185\u90E8\u7C7B\uFF0C\u53EB Node\uFF0C\u4E5F\u5C31\u662F\u8282\u70B9\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">private</span> <span class="token keyword">static</span> <span class="token keyword">class</span> <span class="token class-name">Node</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">E</span><span class="token punctuation">&gt;</span></span> <span class="token punctuation">{</span>
     <span class="token class-name">E</span> item<span class="token punctuation">;</span>
     <span class="token class-name">Node</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">E</span><span class="token punctuation">&gt;</span></span> next<span class="token punctuation">;</span>
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new file mode 100644
index 00000000..eb81e56d
--- /dev/null
+++ b/dist/assets/linux-codingmore-run.html.6ac5d933.js
@@ -0,0 +1 @@
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diff --git a/dist/assets/linux-codingmore-run.html.d96d85b1.js b/dist/assets/linux-codingmore-run.html.d96d85b1.js
new file mode 100644
index 00000000..afe16a1d
--- /dev/null
+++ b/dist/assets/linux-codingmore-run.html.d96d85b1.js
@@ -0,0 +1,77 @@
+import{_ as o}from"./plugin-vue_export-helper.21dcd24c.js";import{r,o as t,c,a as e,b as i,d as n,e as d}from"./app.615e41d8.js";const s={},p=e("h2",{id:"\u4E91\u670D\u52A1\u5668",tabindex:"-1"},[e("a",{class:"header-anchor",href:"#\u4E91\u670D\u52A1\u5668","aria-hidden":"true"},"#"),n(" \u4E91\u670D\u52A1\u5668")],-1),m=n("\u6211\u4EEC\u9700\u8981\u4E00\u53F0\u4E91\u670D\u52A1\u5668\uFF0C\u6211\u4E4B\u524D\u767D\u5AD6\u8FC7\u4E00\u53F0\u4E10\u7248\u7684\uFF0C1 \u68381G \u5185\u5B58\uFF0C\u5E76\u4E14\u5DF2\u7ECF\u5B89\u88C5\u4E86\u5B9D\u5854\u9762\u677F\uFF08\u5B89\u88C5\u6559\u7A0B\u6233"),l={href:"https://tobebetterjavaer.com/szjy/install-baota-mianban.html",target:"_blank",rel:"noopener noreferrer"},b=n("\u94FE\u63A5\u{1F517}"),g=n("\uFF09\u3002"),v=d('<p>\u8FD9\u662F\u4ECE\u5B9D\u5854\u9762\u677F\u9996\u9875\u770B\u5230\u7684\u670D\u52A1\u5668\u914D\u7F6E\u8BE6\u60C5\u3002</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-10ef01787c-ee09-4474-a182-70bd6a2daf72.png" alt=""></p><p>\u9A6C\u4E0A 618 \u4E86\uFF0C\u963F\u91CC\u4E91\u670D\u52A1\u5668\u4E5F\u5F00\u59CB\u6574\u6D3B\u4E86\uFF0C\u9700\u8981\u767D\u5AD6\u7684\u5C0F\u4F19\u4F34\u53EF\u4EE5\u5148\u52A0\u7FA4\u3002</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-10c69c16d4-b9e3-4add-b316-0c4670e76789.png" alt=""></p><h2 id="mysql" tabindex="-1"><a class="header-anchor" href="#mysql" aria-hidden="true">#</a> MySQL</h2><p>\u767B\u5F55\u5B9D\u5854\u9762\u677F\uFF0C\u70B9\u51FB\u300C\u6570\u636E\u5E93\u300D\u2192\u300C\u6DFB\u52A0\u6570\u636E\u5E93\u300D\uFF0C\u586B\u5199\u6570\u636E\u5E93\u540D\uFF0C\u5B9D\u5854\u9762\u677F\u4F1A\u81EA\u52A8\u5E2E\u6211\u4EEC\u521B\u5EFA\u4E00\u4E2A\u548C\u6570\u636E\u5E93\u540C\u540D\u7684\u8D26\u53F7\uFF0C\u6CE8\u610F\u8BBF\u95EE\u6743\u9650\u9009\u62E9\u300C\u672C\u5730\u670D\u52A1\u5668\u300D\u3002</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-10b64e7890-552d-47d5-91bd-03d74bff7974.png" alt=""></p><p>\u5728 codingmore \u680F\u76EE\u4E2D\u70B9\u51FB\u300C\u5BFC\u5165\u300D\u300C\u4ECE\u672C\u5730\u4E0A\u4F20\u300D\u7F16\u7A0B\u55B5\u7684\u6570\u636E\u5E93\u6587\u4EF6\u3002\u4E0A\u4F20\u5B8C\u6210\u540E\u70B9\u51FB\u5BFC\u5165\u3002</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-10eec6b672-9089-414b-9f69-65cae18ae45d.png" alt=""></p><p>DB \u6587\u4EF6\u653E\u5728 coding-more/doc \u76EE\u5F55\u4E0B\u3002</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-102f8aa2a1-1443-49e6-85d0-6b983863d161.png" alt=""></p><p>\u5EFA\u8BAE\u5148\u505A\u4E00\u6B21\u5907\u4EFD\uFF0C\u70B9\u51FB\u300C\u65E0\u5907\u4EFD\u300D\u300C\u5907\u4EFD\u300D\u5C31\u53EF\u4EE5\u5C06\u6211\u4EEC\u7684\u6570\u636E\u5E93\u6587\u4EF6\u5907\u4EFD\u4E0B\u6765\u4E86\uFF0C\u5982\u679C\u540E\u9762\u60F3\u6062\u590D\u7684\u8BDD\uFF0C\u76F4\u63A5\u70B9\u51FB\u300C\u6062\u590D\u300D\u5C31\u53EF\u4EE5\u4E86\u3002</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-10c8edb874-95ad-405c-a57c-9c8b9fab8f6e.png" alt=""></p><p>\u8BB0\u4F4F\u7528\u6237\u540D\uFF0C\u5E76\u590D\u5236\u5BC6\u7801\uFF0C\u7136\u540E\u5728\u6570\u636E\u5E93\u6761\u76EE\u4E2D\u70B9\u51FB\u300C\u7BA1\u7406\u300D</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-1032b5cafc-74ef-4e62-b65d-7e36980c14ed.png" alt=""></p><p>\u586B\u5199\u7528\u6237\u540D\u548C\u5BC6\u7801\u540E\uFF0C\u70B9\u51FB\u6267\u884C\u3002</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-105579299a-bc0c-495d-a41b-31d9214835f3.png" alt=""></p><p>\u5C31\u53EF\u4EE5\u770B\u5230\u7F16\u7A0B\u55B5\u7684\u6570\u636E\u5E93\u6587\u4EF6\u4E86\u3002</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-100877b273-1ba2-40ed-8f96-0031c75e3680.png" alt=""></p><h2 id="nginx" tabindex="-1"><a class="header-anchor" href="#nginx" aria-hidden="true">#</a> Nginx</h2>',20),h={href:"https://tobebetterjavaer.com/nginx/nginx.html",target:"_blank",rel:"noopener noreferrer"},_=n("Nginx"),u=n(" \u662F\u4E00\u4E2A\u9AD8\u6027\u80FD\u7684 HTTP \u548C\u53CD\u5411\u4EE3\u7406 Web \u670D\u52A1\u5668\uFF0C\u57FA\u672C\u4E0A\u5C31\u53D8\u6210\u4E86\u4E00\u4E2A\u670D\u52A1\u5668\u5FC5\u987B\u5B89\u88C5\u7684\u524D\u7F6E\u6761\u4EF6\u4E4B\u4E00\u3002"),f=d('<p>\u5B9D\u5854\u9762\u677F\u4E2D\u5B89\u88C5 Nginx \u6BD4\u8F83\u7B80\u5355\uFF0C\u76F4\u63A5\u5728\u8F6F\u4EF6\u5546\u5E97\u4E2D\u641C\u300CNginx\u300D\u5C31\u53EF\u4EE5\u70B9\u51FB\u5B89\u88C5\u4E86\u3002</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-10cedec531-ae0e-402c-87ca-ee705a469288.png" alt=""></p><h2 id="redis" tabindex="-1"><a class="header-anchor" href="#redis" aria-hidden="true">#</a> Redis</h2><p>\u5B9D\u5854\u9762\u677F\u4E2D\u5B89\u88C5 Redis \u4E5F\u6BD4\u8F83\u7B80\u5355\uFF0C\u76F4\u63A5\u5728\u8F6F\u4EF6\u5546\u5E97\u4E2D\u641C\u300CRedis\u300D\u5C31\u53EF\u4EE5\u70B9\u51FB\u5B89\u88C5\u4E86\u3002</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-10eab69fa2-b7cd-419a-a290-0cc0da2b30c3.png" alt=""></p><h2 id="\u9879\u76EE\u6253\u5305" tabindex="-1"><a class="header-anchor" href="#\u9879\u76EE\u6253\u5305" aria-hidden="true">#</a> \u9879\u76EE\u6253\u5305</h2><h3 id="_1-codingmore-admin" tabindex="-1"><a class="header-anchor" href="#_1-codingmore-admin" aria-hidden="true">#</a> 1\uFF09codingmore-admin</h3><p>\u7F16\u7A0B\u55B5\u7684\u7BA1\u7406\u540E\u7AEF\uFF0C\u6CE8\u610F\u4FEE\u6539\u751F\u4EA7\u73AF\u5883\u4E0B\u7684 MySQL \u7528\u6237\u540D\u548C\u5BC6\u7801\uFF0C\u5728 application-prod.yml \u6587\u4EF6\u4E2D\u3002</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-100a38b5dd-ecd4-4734-bf6a-448397fa5463.png" alt=""></p><p>\u7136\u540E\u628A application.yml \u6587\u4EF6\u4E2D\u7684 active \u4FEE\u6539\u4E3A prod \u751F\u4EA7\u73AF\u5883\u3002</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-10dd44a2ce-600d-43b1-8707-4de25287eed9.png" alt=""></p><p>\u66FF\u6362 OSS \u914D\u7F6E\u3002</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-108ebb40d9-64a1-43cd-89fd-4b83e47025de.png" alt=""></p><h3 id="_2-codingmore-web" tabindex="-1"><a class="header-anchor" href="#_2-codingmore-web" aria-hidden="true">#</a> 2\uFF09codingmore-web</h3><p>\u7F16\u7A0B\u55B5\u7684 Web \u524D\u7AEF\uFF08\u7F51\u7AD9\u95E8\u6237\u3001\u6587\u7AE0\u5C55\u793A/\u6587\u7AE0\u8BE6\u60C5\u7B49\uFF09\uFF0C\u6CE8\u610F\u4FEE\u6539\u751F\u4EA7\u73AF\u5883\u4E0B\u7684 MySQL \u7528\u6237\u540D\u548C\u5BC6\u7801\uFF0C\u5728 application-prod.yml \u6587\u4EF6\u4E2D\u3002</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-1066ba1162-a198-45e4-87ad-717c62fae6c7.png" alt=""></p><p>\u7136\u540E\u628A application.yml \u6587\u4EF6\u4E2D\u7684 active \u4FEE\u6539\u4E3A prod \u751F\u4EA7\u73AF\u5883\u3002</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-10560633b8-439d-418e-a3bb-61f21efbae9f.png" alt=""></p><p>\u7136\u540E\u5C31\u53EF\u4EE5\u53CC\u51FB Maven \u7684 package \u6253\u5305\u4E86\u3002</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-1089745ff7-9222-4d49-b6b9-66fbddba1e52.png" alt=""></p><h3 id="_3-codingmore-admin-web" tabindex="-1"><a class="header-anchor" href="#_3-codingmore-admin-web" aria-hidden="true">#</a> 3\uFF09codingmore-admin-web</h3><p>admin \u7BA1\u7406\u7AEF\u7684\u524D\u7AEF\u754C\u9762\u3002\u5728 Visual Studio Code \u4E2D\uFF0C\u73B0\u5728\u7EC8\u7AEF\u4E2D\u6267\u884C <code>yarn install</code> \u5B89\u88C5\u9879\u76EE\u7684\u4F9D\u8D56\u63D2\u4EF6\u3002</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-10d6a9cbaf-fd70-4567-b6b0-b2c50b61407a.png" alt=""></p><p>\u518D\u6267\u884C <code>yarn run build</code> \u5C31\u53EF\u4EE5\u6784\u5EFA codingmore-admin-web \u7684\u9759\u6001\u9875\u9762\u4E86\u3002</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-101aedea50-7f21-4199-9ff2-c264b614e711.png" alt=""></p><p>\u4F1A\u5728\u9879\u76EE\u7684\u6839\u76EE\u5F55\u4E2D\u751F\u6210\u4E00\u4E2A dist \u76EE\u5F55\uFF0C\u91CC\u9762\u5C31\u662F\u6253\u5305\u597D\u7684\u7BA1\u7406\u7AEF\u9759\u6001\u9875\u9762\u3002</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-10128e58f4-172a-4c77-acf1-324ed310412c.png" alt=""></p><p>\u6253\u5305\u7684\u65F6\u5019\u6709\u4E24\u4E2A\u8981\u70B9\u8981\u8865\u5145\u4E0B\uFF0C\u5728 config \u76EE\u5F55\u4E0B\u6709\u4E09\u4E2A\u914D\u7F6E\u6587\u4EF6\uFF0Cdev.env.js \u662F\u5F00\u53D1\u73AF\u5883\u4E0B\u7684\u4E00\u4E9B\u914D\u7F6E\uFF0Cindex.js \u662F\u4E3B\u914D\u7F6E\uFF0Cprod.env.js \u662F\u751F\u4EA7\u73AF\u5883\u4E0B\u7684\u914D\u7F6E\u3002</p><p>\u4E3A\u4E86\u63D0\u9AD8\u7F51\u7AD9\u7684\u6027\u80FD\uFF0C\u6211\u4EEC\u9700\u8981\u5173\u95ED source map\uFF0C\u8BBE\u7F6E <code>productionSourceMap: false</code>\uFF0C\u540C\u65F6\u5F00\u542F js \u548C css \u7684\u6587\u4EF6\u538B\u7F29\u529F\u80FD\u3002</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-10c2b78cd1-4c55-4fce-9c7a-0afbdd21a659.png" alt=""></p><p>\u8FD9\u6837\u6253\u5305\u540E\u7684\u6587\u4EF6\u5927\u5C0F\u5C31\u4F1A\u5C0F\u5F88\u591A\uFF0C\u653E\u5230\u670D\u52A1\u5668\u4E0A\u4E5F\u80FD\u51CF\u5C11\u7F51\u7EDC\u8BF7\u6C42\u7684\u54CD\u5E94\u65F6\u95F4\u3002</p><p>\u53EF\u4EE5\u770B\u5F97\u51FA\uFF0C\u6700\u5927\u7684\u4E00\u4E2A js \u6587\u4EF6\u4E3A 3.7M\uFF0C\u538B\u7F29\u7248\u53EA\u6709 662kb\uFF0C\u4F53\u79EF\u7F29\u5C0F\u4E86\u4E94\u500D\u3002</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-1009d6dc89-05a3-4a43-972b-bbad4bdd34e5.png" alt=""></p><h2 id="\u5C06\u6253\u5305\u597D\u7684\u6587\u4EF6\u4E0A\u4F20\u5230\u670D\u52A1\u5668" tabindex="-1"><a class="header-anchor" href="#\u5C06\u6253\u5305\u597D\u7684\u6587\u4EF6\u4E0A\u4F20\u5230\u670D\u52A1\u5668" aria-hidden="true">#</a> \u5C06\u6253\u5305\u597D\u7684\u6587\u4EF6\u4E0A\u4F20\u5230\u670D\u52A1\u5668</h2><p>\u5728\u5B9D\u5854\u9762\u677F\u4E2D\u70B9\u51FB\u300CFTP\u300D\u300C\u6DFB\u52A0 FTP\u300D\u3002</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-1047c54369-e3af-48ea-8143-ea1dbce36894.png" alt=""></p><p>\u70B9\u51FB\u300C\u6839\u76EE\u5F55\u300D</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-103cdb501e-0145-48b2-ac3f-96b6e99e8ecf.png" alt=""></p><p>\u8DF3\u8F6C\u5230\u6587\u4EF6\u9875\u3002</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-106d8e3ef4-e032-4c2d-b872-c7ede968a051.png" alt=""></p><p>\u70B9\u51FB\u4E0A\u4F20\uFF0C\u5728 target \u76EE\u5F55\u4E0B\u9009\u62E9\u4E0A\u4F20\u7684\u4E24\u4E2A jar \u5305\uFF0Cadmin \u548C web\u3002</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-10b1544314-3fc7-4fba-a9e5-28a1760d3517.png" alt=""></p><p>\u70B9\u51FB\u300C\u5F00\u59CB\u4E0A\u4F20\u300D</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-10ffe802fb-da43-404a-aaaf-f5b5eb4bdcc3.png" alt=""></p><p>\u8FD8\u6709 codingmore-admin-web \u7684\u9759\u6001\u6587\u4EF6\u3002</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-10f55854dd-b6a5-4a46-8232-e21bb03b788f.png" alt=""></p><h2 id="\u4E00\u952E\u90E8\u7F72" tabindex="-1"><a class="header-anchor" href="#\u4E00\u952E\u90E8\u7F72" aria-hidden="true">#</a> \u4E00\u952E\u90E8\u7F72</h2><p>\u5728\u8F6F\u4EF6\u5546\u5E97\u91CC\u641C\u300C<strong>Java</strong>\u300D\u5173\u952E\u5B57\uFF0C\u53EF\u4EE5\u770B\u5230\u4E00\u4E2A\u300C<strong>Java \u9879\u76EE\u4E00\u952E\u90E8\u7F72 3.5</strong>\u300D\u7684\u63D2\u4EF6\uFF0C\u5B89\u88C5\u5B83\u3002</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-10e784ae11-5d73-41c3-929e-60f7c1114f73.png" alt=""></p><p>\u8FDB\u5165\u300CJava \u9879\u76EE\u4E00\u952E\u90E8\u7F72\u300D\u9762\u677F\u3002</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-102724c169-4f6c-4208-aa3e-ab4936a14e7a.png" alt=""></p><p>\u53EF\u4EE5\u5728\u300C\u5BB9\u5668\u7BA1\u7406\u300D\u9762\u677F\u4E2D\u9009\u62E9 Tomcat 8 \u5B89\u88C5\u4E0B\uFF0C\u5982\u679C\u6CA1\u6709\u5B89\u88C5 JDK\uFF0C\u5728\u5B89\u88C5 Tomcat 8 \u7684\u65F6\u5019\u4F1A\u9ED8\u8BA4\u5B89\u88C5\u4E00\u4E2A JDK 1.8\u3002</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-1059bcd44e-be2d-4c7b-81c3-c974f5c9a33a.png" alt=""></p><p>\u8FDB\u5165 Spring Boot \u9762\u677F\uFF0C\u70B9\u51FB\u300C\u6DFB\u52A0\u9879\u76EE\u300D\uFF0C\u70B9\u51FB\u300C\u9879\u76EE\u8DEF\u5F84\u300D\u53F3\u4FA7\u7684\u6587\u4EF6\u5939\u56FE\u6807\uFF0C\u5C31\u53EF\u4EE5\u4E0A\u4F20\u90E8\u7F72\u6211\u4EEC\u7684 Spring Boot \u9879\u76EE\u4E86\u3002</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-10f39e778b-2d59-4087-bd89-86d71231ff6e.png" alt=""></p><h3 id="codingmore-web-\u7F51\u7AD9\u524D\u7AEF" tabindex="-1"><a class="header-anchor" href="#codingmore-web-\u7F51\u7AD9\u524D\u7AEF" aria-hidden="true">#</a> codingmore-web\uFF08\u7F51\u7AD9\u524D\u7AEF\uFF09</h3><p>\u5148\u9009\u62E9 codingmore-web\u3002</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-108d03852e-c207-442d-9ce9-770c6a16710b.png" alt=""></p><p>\u586B\u5199\u57DF\u540D\uFF08\u7F16\u7A0B\u55B5\u7684\u57DF\u540D\u4E3A <a href="codingmore.top">codingmore.top</a>\uFF09\uFF0C\u4FEE\u6539\u7AEF\u53E3\u53F7\u4E3A 8081\uFF0Capplication.yml \u6587\u4EF6\u4E2D\u5B9A\u4E49\u7684\u3002</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-10358f631c-27c8-4460-a00e-5c17a3077f28.png" alt=""></p><p>\u70B9\u51FB\u786E\u5B9A\u3002</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-1099646018-e244-421c-9232-4f40c4e07444.png" alt=""></p><p>\u53EF\u4EE5\u770B\u5230\u670D\u52A1\u5DF2\u7ECF\u5728\u542F\u52A8\u4E86\uFF0C\u70B9\u300C\u65E5\u5FD7\u300D\u770B\u4E00\u4E0B\u3002</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-1053ab9712-5874-4650-92da-e6978803c4de.png" alt=""></p><p>\u6CA1\u95EE\u9898\u3002</p><p>\u4E5F\u53EF\u4EE5\u5728\u8FD9\u4E2A\u8DEF\u5F84\u4E0B\u4F7F\u7528\u7EC8\u7AEF\u5DE5\u5177\u770B\u65E5\u5FD7\u3002</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-107242861b-2cfc-4eb2-8414-6afade214a74.png" alt=""></p><p>\u5728\u5B89\u5168\u9762\u677F\u91CC\u786E\u8BA4\u4E00\u4E0B 8081 \u7AEF\u53E3\u662F\u5426\u653E\u5F00\u3002</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-109c7d80a2-fb84-43b9-86fc-670221607b22.png" alt=""></p><p>\u786E\u8BA4\u653E\u5F00\u540E\uFF0C\u6253\u5F00 Chrome \u6D4F\u89C8\u5668\u7684\u65E0\u75D5\u6A21\u5F0F\uFF0C\u8F93\u5165 IP+\u7AEF\u53E3\u53F7\u3002</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-109f8efbcd-3e6f-4877-ad90-b766dda67879.png" alt=""></p><p>\u901A\u8FC7\u57DF\u540D+\u7AEF\u53E3\u53F7\u7684\u5F62\u5F0F\u4E5F\u53EF\u4EE5\u8BBF\u95EE\u5230\u3002</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-10f50b5c71-35bd-439c-bb82-07348a5155d3.png" alt=""></p><h3 id="codingmore-admin-\u7F51\u7AD9\u7BA1\u7406\u7AEF" tabindex="-1"><a class="header-anchor" href="#codingmore-admin-\u7F51\u7AD9\u7BA1\u7406\u7AEF" aria-hidden="true">#</a> codingmore-admin\uFF08\u7F51\u7AD9\u7BA1\u7406\u7AEF\uFF09</h3><p>\u518D\u6B21\u8FDB\u5165 \u300CJava \u9879\u76EE\u4E00\u952E\u90E8\u7F72\u300DSpring Boot \u9762\u677F\u4E2D\uFF0C\u6DFB\u52A0 codingmore-admin \u9879\u76EE\u3002</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-1001b5b9f3-05f8-4fdf-9c8a-111ec449826f.png" alt=""></p><p>\u7A0D\u7B49\u7247\u523B\uFF0C\u6765\u770B\u4E00\u4E0B\u65E5\u5FD7\u3002</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-103a4c0249-f250-4199-ba3c-eeb1ca005bd0.png" alt=""></p><p>\u542F\u52A8\u6CA1\u95EE\u9898\u3002</p><p>codingmore-admin \u53EA\u662F\u4E00\u4E2A\u540E\u7AEF\u670D\u52A1\uFF0C\u754C\u9762\u662F\u7528 vue \u5B8C\u6210\u7684\uFF0C\u6240\u4EE5\u6211\u4EEC\u6B64\u65F6\u53EF\u4EE5\u901A\u8FC7 Swagger \u6765\u786E\u8BA4\u4E00\u4E0B\u63A5\u53E3\u662F\u5426\u53EF\u4EE5\u6B63\u5E38\u8BBF\u95EE\u3002</p><p>\u5148\u653E\u884C 9002 \u7AEF\u53E3\u3002</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-10f6b25066-3ffa-4dfc-a61c-b6ebb16e339b.png" alt=""></p><p>\u5728\u6D4F\u89C8\u5668\u5730\u5740\u680F\u91CC\u8F93\u5165 <code>http://www.codingmore.top:9002/doc.html</code>\uFF0C\u53EF\u4EE5\u770B\u5230\u6211\u4EEC\u7528 Knife4j+Swagger \u751F\u6210\u7684 API \u6587\u6863\u63A5\u53E3\u3002</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-10a04aa484-a7f1-48f1-a3ff-1525b9bd7035.png" alt=""></p><p>OK\uFF0C\u8FD9\u6837\u5C31\u53EF\u4EE5\u9A8C\u8BC1\u6211\u4EEC\u7684 admin \u7AEF\u670D\u52A1\u4E5F\u6B63\u786E\u8FD0\u884C\u4E86\u3002</p><p>\u968F\u540E\uFF0C\u4E3A\u4E86\u51CF\u5C11\u670D\u52A1\u5668\u88AB\u653B\u51FB\u7684\u53EF\u80FD\u6027\uFF0C\u6211\u4EEC\u5173\u6389 9002 \u7684\u7AEF\u53E3\u3002</p><h2 id="nginx-\u914D\u7F6E" tabindex="-1"><a class="header-anchor" href="#nginx-\u914D\u7F6E" aria-hidden="true">#</a> Nginx \u914D\u7F6E</h2><h3 id="codingmore-web" tabindex="-1"><a class="header-anchor" href="#codingmore-web" aria-hidden="true">#</a> codingmore-web</h3><p>\u57DF\u540D+\u7AEF\u53E3\u53F7\u867D\u7136\u53EF\u4EE5\u8BBF\u95EE\uFF0C\u4F46\u4E0D\u591F\u4F18\u96C5\uFF0C\u6211\u4EEC\u60F3\u76F4\u63A5\u8BBF\u95EE\u57DF\u540D codingmore.top\uFF0C\u8BE5\u600E\u4E48\u529E\u5462\uFF1F</p>',89),w=n("\u53EF\u4EE5\u4F7F\u7528 "),x={href:"https://tobebetterjavaer.com/nginx/nginx.html",target:"_blank",rel:"noopener noreferrer"},j=n("Nginx"),y=n(" \u8FDB\u884C\u7AEF\u53E3\u8F6C\u53D1\u3002"),N=d(`<p>Nginx \u7684\u5B9E\u73B0\u539F\u7406\u662F\uFF0C\u7528 Nginx \u76D1\u542C 80 \u7AEF\u53E3\uFF0C\u5F53\u6709 HTTP \u8BF7\u6C42\u5230\u6765\u65F6\uFF0C\u5C06 HTTP \u8BF7\u6C42\u7684 HOST \u7B49\u4FE1\u606F\u4E0E\u914D\u7F6E\u6587\u4EF6\u8FDB\u884C\u5339\u914D\u5E76\u8F6C\u53D1\u7ED9\u5BF9\u5E94\u7684\u7AEF\u53E3\u3002</p><p>\u6BD4\u5982\u8BF4\uFF0C\u5F53\u7528\u6237\u8BBF\u95EE codingmore.top \u65F6\uFF0CNginx \u4ECE\u914D\u7F6E\u6587\u4EF6\u4E2D\u5F97\u77E5\u8FD9\u662F\u4E00\u4E2A HTTP \u8BF7\u6C42\uFF0C\u4E8E\u662F\u5C06\u6B64\u8BF7\u6C42\u8F6C\u53D1\u7ED9 8081 \u7AEF\u53E3\u7684\u5E94\u7528\u5904\u7406\u3002</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>upstream codingmore_web_pool{
+    server 127.0.0.1:8081;
+}
+
+server {
+    listen       80;
+    server_name  codingmore.top;
+    access_log logs/codingmore_web.log;
+    error_log logs/codingmore_web.error;
+    
+    #\u5C06\u6240\u6709\u8BF7\u6C42\u8F6C\u53D1\u7ED9pool\u6C60\u7684\u5E94\u7528\u5904\u7406
+    location / {
+        proxy_set_header Host $host;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_pass http://codingmore_web_pool;
+    }
+}
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>\u8FD9\u5C31\u662F\u6240\u8C13\u7684\u7AEF\u53E3\u8F6C\u53D1\uFF0C\u7531\u8F6F\u4EF6\u7EDF\u4E00\u76D1\u542C\u67D0\u4E2A\u57DF\u540D\u4E0A\u7684\u67D0\u4E2A\u7AEF\u53E3\uFF08\u4E00\u822C\u662F80\u7AEF\u53E3\uFF09\uFF0C\u5F53\u8BBF\u95EE\u670D\u52A1\u5668\u7684\u57DF\u540D\u548C\u7AEF\u53E3\u7B26\u5408\u8981\u6C42\u65F6\uFF0C\u5C31\u6309\u7167\u914D\u7F6E\u8F6C\u53D1\u7ED9\u6307\u5B9A\u7684 Tomcat \u670D\u52A1\u5668\u5904\u7406\u3002\u6211\u4EEC\u5E38\u7528\u7684 Nginx \u4E5F\u6709\u7AEF\u53E3\u8F6C\u53D1\u529F\u80FD\u3002</p><p>OK\uFF0C\u539F\u7406\u4E86\u89E3\u5B8C\u540E\uFF0C\u6211\u4EEC\u628A\u8FD9\u6BB5\u914D\u7F6E\u590D\u5236\u5230\u5B9D\u5854\u9762\u677F\u4E2D\u7684 Nginx \u914D\u7F6E\u4E2D\u3002</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-1053849d03-ca6c-4871-9103-b65238557c50.png" alt=""></p><p>\u70B9\u51FB\u300C\u4FDD\u5B58\u300D\u3002</p>`,7),S=n("\u518D\u5728\u6D4F\u89C8\u5668\u4E2D\u8BBF\u95EE "),k={href:"http://www.codingmore.top/",target:"_blank",rel:"noopener noreferrer"},P=n("codingmore.top"),T=n(" \u5C31\u53EF\u4EE5\u8BF7\u6C42\u5230\u5185\u5BB9\u4E86\u3002"),F=d(`<p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-106302a681-0dbe-4d76-ac54-243ef67914c7.png" alt=""></p><p>\u65E2\u7136\u5982\u6B64\uFF0C\u6211\u4EEC\u987A\u5E26\u628A 8081 \u7AEF\u53E3\u7ED9\u5173\u6389\uFF0C\u51CF\u5C11\u4E00\u4E2A\u670D\u52A1\u5668\u88AB\u653B\u51FB\u7684\u53EF\u80FD\u6027\u3002</p><p>OK\uFF0C\u8FD9\u6837\u6211\u4EEC\u5C31\u5B8C\u6210\u4E86 codingmore-web \u4E5F\u5C31\u662F\u7F16\u7A0B\u55B5\u{1F431}\u524D\u7AEF\u7684\u670D\u52A1\u90E8\u7F72\u4E86\u3002</p><h3 id="codingmore-admin-web" tabindex="-1"><a class="header-anchor" href="#codingmore-admin-web" aria-hidden="true">#</a> codingmore-admin-web</h3><p>codingmore-admin-web \u6253\u5305\u540E\u7684\u6587\u4EF6\u662F\u9759\u6001\u7684\uFF0C\u6240\u4EE5\u6211\u4EEC\u53EA\u9700\u8981\u5728 Nginx \u91CC\u6DFB\u52A0 admin \u7684\u914D\u7F6E\u8DEF\u5F84\u5C31 OK \u4E86\u3002</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>upstream codingmore_web_pool{
+    server 127.0.0.1:8081;
+}
+
+server {
+    listen       80;
+    server_name  codingmore.top;
+    access_log /home/www/codingmore_web.log;
+    error_log /home/www/codingmore_web.error;
+
+    location /admin {
+        alias /www/wwwroot/itwanger/dist/; # \u6839\u76EE\u5F55
+        index index.html;
+    }
+    
+    #\u5C06\u6240\u6709\u8BF7\u6C42\u8F6C\u53D1\u7ED9pool\u6C60\u7684\u5E94\u7528\u5904\u7406
+    location / {
+        proxy_set_header Host $host;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_pass http://codingmore_web_pool;
+    }
+}
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div>`,6),B=n("\u6211\u4EEC\u5728 server \u4E2D\u589E\u52A0\u4E86\u4E00\u4E2A admin \u7684 location\uFF0C\u4E5F\u5C31\u662F\u8BF4\uFF0C\u5F53\u6211\u4EEC\u8BBF\u95EE "),E={href:"http://codingmore.top/admin",target:"_blank",rel:"noopener noreferrer"},H=n("codingmore.top/admin"),K=n(" \u7684\u65F6\u5019\uFF0C\u5C31\u53BB\u8BF7\u6C42 "),O=e("code",null,"/www/wwwroot/itwanger/dist/",-1),A=n(" \u76EE\u5F55\u4E0B\u7684\u9759\u6001\u6587\u4EF6\u3002"),V=e("p",null,"\u8FD9\u91CC\u8BB2\u4E00\u4E0B root \u548C alias \u7684\u533A\u522B\uFF1A",-1),$=e("ul",null,[e("li",null,[n("root\uFF1A\u5B9E\u9645\u8BBF\u95EE\u7684\u5730\u5740\u524D\u7F00\u662F root + \u8BF7\u6C42\u7684 path\u8DEF\u5F84\uFF0C\u5373 "),e("code",null,"admin => /www/wwwroot/itwanger/dist/admin")]),e("li",null,[n("alias: \u5B9E\u9645\u8BBF\u95EE\u7684\u5C31\u662F "),e("code",null,"/www/wwwroot/itwanger/dist")])],-1),I=n("\u6CE8\u610F\u4E24\u8005\u7684\u533A\u522B\u3002\u6211\u4EEC\u6765\u8BBF\u95EE\u4E0B"),q={href:"http://codingmore.top/admin",target:"_blank",rel:"noopener noreferrer"},J=n("codingmore.top/admin"),M=n("\uFF1A"),L=d(`<p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-1050bb8a6a-aeee-4514-a62a-cd87cb82b3d4.png" alt=""></p><p>OK\u3002</p><p>\u7F16\u7A0B\u55B5\u{1F431}\u662F\u4E00\u4E2A\u524D\u540E\u7AEF\u5206\u79BB\u9879\u76EE\uFF0C\u524D\u7AEF\u7684\u8BF7\u6C42\u5982\u4F55\u8BBF\u95EE\u540E\u7AEF\u7684 API \u63A5\u53E3\u5462\uFF1F\u7B80\u5355\u804A\u4E00\u4E0B\u3002</p><p>\u6253\u5F00 codingmore-admin-web/config/prod.env.js \u6587\u4EF6\uFF0C\u91CC\u9762\u6709\u4E00\u4E2A VUE_APP_BASE_API \u5C5E\u6027\uFF0C\u5B83\u7684\u503C\u4E3A <code>/api</code>\uFF0C\u4E5F\u5C31\u610F\u5473\u7740\u524D\u7AEF\u7684\u8BF7\u6C42\u4F1A\u53D1\u9001\u5230 <code>/api</code> \u8FD9\u4E2A\u524D\u7F00\u8DEF\u5F84\u4E0B\u3002</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&#39;use strict&#39;
+module.exports = {
+  NODE_ENV: &#39;&quot;production&quot;&#39;,
+  VUE_APP_BASE_API: &#39;&quot;/api&quot;&#39;
+}
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>\u90A3\u6211\u4EEC\u7684 codingmore-admin \u540E\u7AEF\u670D\u52A1\u662F\u8DD1\u5728 9002 \u7AEF\u53E3\u4E0B\u7684\uFF0C\u8FD9\u5C31\u610F\u5473\u7740\uFF0C\u6211\u4EEC\u9700\u8981\u5728 Nginx \u4E2D\u589E\u52A0\u4E00\u4E2A\u8DEF\u5F84\uFF0C\u5C06 api \u524D\u7F00\u7684\u8BF7\u6C42\u8F6C\u53D1\u5230 9002 \u4E0B\u3002</p><p>OK\uFF0C\u6765\u770B\u4E00\u4E0B\u5B8C\u6574\u7684\u914D\u7F6E\u5185\u5BB9\u3002</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>upstream codingmore_web_pool{
+    server 127.0.0.1:8081;
+}
+
+upstream codingmore_admin_pool{
+    server 127.0.0.1:9002/;
+}
+
+server {
+    listen       80;
+    server_name  codingmore.top;
+    access_log /home/www/codingmore_web.log;
+    error_log /home/www/codingmore_web.error;
+
+    location /admin {
+        alias /www/wwwroot/itwanger/dist/; # \u6839\u76EE\u5F55
+        index index.html;
+    }
+
+    location /api/ {
+        proxy_set_header Host $host;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_pass http://codingmore_admin_pool;
+    }
+    
+    #\u5C06\u6240\u6709\u8BF7\u6C42\u8F6C\u53D1\u7ED9pool\u6C60\u7684\u5E94\u7528\u5904\u7406
+    location / {
+        proxy_set_header Host $host;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_pass http://codingmore_web_pool;
+    }
+}
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>ok\uFF0C\u767B\u5F55 admin \u7AEF\uFF0C\u53EF\u4EE5\u770B\u5230\u6211\u4EEC\u7684\u6587\u7AE0\u7BA1\u7406\u9875\u9762\u4E86\u3002</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-1061fbe711-7715-47d5-9bb9-21b872881be1.png" alt=""></p><h2 id="\u7F51\u7AD9\u57DF\u540D" tabindex="-1"><a class="header-anchor" href="#\u7F51\u7AD9\u57DF\u540D" aria-hidden="true">#</a> \u7F51\u7AD9\u57DF\u540D</h2>`,11),C=n("\u7F16\u7A0B\u55B5 web \u7AEF\uFF1A"),D={href:"http://www.codingmore.top/admin/",target:"_blank",rel:"noopener noreferrer"},R=n("www.codingmore.top"),X=n("\u7F16\u7A0B\u55B5 admin \u7AEF\uFF1A"),Q={href:"http://www.codingmore.top/admin",target:"_blank",rel:"noopener noreferrer"},U=n("www.codingmore.top/admin");function W(z,G){const a=r("ExternalLinkIcon");return t(),c("div",null,[p,e("p",null,[m,e("a",l,[b,i(a)]),g]),v,e("p",null,[e("a",h,[_,i(a)]),u]),f,e("p",null,[w,e("a",x,[j,i(a)]),y]),N,e("p",null,[S,e("a",k,[P,i(a)]),T]),F,e("p",null,[B,e("a",E,[H,i(a)]),K,O,A]),V,$,e("p",null,[I,e("a",q,[J,i(a)]),M]),L,e("ul",null,[e("li",null,[C,e("a",D,[R,i(a)])]),e("li",null,[X,e("a",Q,[U,i(a)])])])])}var ee=o(s,[["render",W],["__file","linux-codingmore-run.html.vue"]]);export{ee as default};
diff --git a/dist/assets/list-war-2.html.96808d02.js b/dist/assets/list-war-2.html.4306ceaf.js
similarity index 99%
rename from dist/assets/list-war-2.html.96808d02.js
rename to dist/assets/list-war-2.html.4306ceaf.js
index ee09c976..5437956a 100644
--- a/dist/assets/list-war-2.html.96808d02.js
+++ b/dist/assets/list-war-2.html.4306ceaf.js
@@ -1,4 +1,4 @@
-import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e as p}from"./app.a0271b9c.js";const t={},e=p(`<h1 id="java\u4E2Darraylist\u548Clinkedlist\u7684\u533A\u522B" tabindex="-1"><a class="header-anchor" href="#java\u4E2Darraylist\u548Clinkedlist\u7684\u533A\u522B" aria-hidden="true">#</a> Java\u4E2DArrayList\u548CLinkedList\u7684\u533A\u522B</h1><h3 id="_01\u3001arraylist-\u662F\u5982\u4F55\u5B9E\u73B0\u7684" tabindex="-1"><a class="header-anchor" href="#_01\u3001arraylist-\u662F\u5982\u4F55\u5B9E\u73B0\u7684" aria-hidden="true">#</a> 01\u3001ArrayList \u662F\u5982\u4F55\u5B9E\u73B0\u7684\uFF1F</h3><p>ArrayList \u5B9E\u73B0\u4E86 List \u63A5\u53E3\uFF0C\u7EE7\u627F\u4E86 AbstractList \u62BD\u8C61\u7C7B\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/collection/list-war-2-01.png" alt=""></p><p>\u5E95\u5C42\u662F\u57FA\u4E8E\u6570\u7EC4\u5B9E\u73B0\u7684\uFF0C\u5E76\u4E14\u5B9E\u73B0\u4E86\u52A8\u6001\u6269\u5BB9</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">ArrayList</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">E</span><span class="token punctuation">&gt;</span></span> <span class="token keyword">extends</span> <span class="token class-name">AbstractList</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">E</span><span class="token punctuation">&gt;</span></span>
+import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e as p}from"./app.615e41d8.js";const t={},e=p(`<h1 id="java\u4E2Darraylist\u548Clinkedlist\u7684\u533A\u522B" tabindex="-1"><a class="header-anchor" href="#java\u4E2Darraylist\u548Clinkedlist\u7684\u533A\u522B" aria-hidden="true">#</a> Java\u4E2DArrayList\u548CLinkedList\u7684\u533A\u522B</h1><h3 id="_01\u3001arraylist-\u662F\u5982\u4F55\u5B9E\u73B0\u7684" tabindex="-1"><a class="header-anchor" href="#_01\u3001arraylist-\u662F\u5982\u4F55\u5B9E\u73B0\u7684" aria-hidden="true">#</a> 01\u3001ArrayList \u662F\u5982\u4F55\u5B9E\u73B0\u7684\uFF1F</h3><p>ArrayList \u5B9E\u73B0\u4E86 List \u63A5\u53E3\uFF0C\u7EE7\u627F\u4E86 AbstractList \u62BD\u8C61\u7C7B\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/collection/list-war-2-01.png" alt=""></p><p>\u5E95\u5C42\u662F\u57FA\u4E8E\u6570\u7EC4\u5B9E\u73B0\u7684\uFF0C\u5E76\u4E14\u5B9E\u73B0\u4E86\u52A8\u6001\u6269\u5BB9</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">ArrayList</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">E</span><span class="token punctuation">&gt;</span></span> <span class="token keyword">extends</span> <span class="token class-name">AbstractList</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">E</span><span class="token punctuation">&gt;</span></span>
         <span class="token keyword">implements</span> <span class="token class-name">List</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">E</span><span class="token punctuation">&gt;</span></span><span class="token punctuation">,</span> <span class="token class-name">RandomAccess</span><span class="token punctuation">,</span> <span class="token class-name">Cloneable</span><span class="token punctuation">,</span> <span class="token class-name"><span class="token namespace">java<span class="token punctuation">.</span>io<span class="token punctuation">.</span></span>Serializable</span>
 <span class="token punctuation">{</span>
     <span class="token keyword">private</span> <span class="token keyword">static</span> <span class="token keyword">final</span> <span class="token keyword">int</span> DEFAULT_CAPACITY <span class="token operator">=</span> <span class="token number">10</span><span class="token punctuation">;</span>
diff --git a/dist/assets/lock.html.a13afff5.js b/dist/assets/lock.html.707d5244.js
similarity index 99%
rename from dist/assets/lock.html.a13afff5.js
rename to dist/assets/lock.html.707d5244.js
index 9c6fcdc5..e8fe3a9c 100644
--- a/dist/assets/lock.html.a13afff5.js
+++ b/dist/assets/lock.html.707d5244.js
@@ -1,4 +1,4 @@
-import{_ as t}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o,c,a as n,b as a,e as l,d as e}from"./app.a0271b9c.js";const i={},r=l(`<h1 id="\u5927\u81F4\u4E86\u89E3\u4E0Bjava\u7684\u9501\u63A5\u53E3\u548C\u9501" tabindex="-1"><a class="header-anchor" href="#\u5927\u81F4\u4E86\u89E3\u4E0Bjava\u7684\u9501\u63A5\u53E3\u548C\u9501" aria-hidden="true">#</a> \u5927\u81F4\u4E86\u89E3\u4E0BJava\u7684\u9501\u63A5\u53E3\u548C\u9501</h1><p>\u524D\u9762\u6211\u4EEC\u4ECB\u7ECD\u4E86Java\u539F\u751F\u7684\u9501\u2014\u2014\u57FA\u4E8E\u5BF9\u8C61\u7684\u9501\uFF0C\u5B83\u4E00\u822C\u662F\u914D\u5408synchronized\u5173\u952E\u5B57\u6765\u4F7F\u7528\u7684\u3002\u5B9E\u9645\u4E0A\uFF0CJava\u5728<code>java.util.concurrent.locks</code>\u5305\u4E0B\uFF0C\u8FD8\u4E3A\u6211\u4EEC\u63D0\u4F9B\u4E86\u51E0\u4E2A\u5173\u4E8E\u9501\u7684\u7C7B\u548C\u63A5\u53E3\u3002\u5B83\u4EEC\u6709\u66F4\u5F3A\u5927\u7684\u529F\u80FD\u6216\u66F4\u9AD8\u7684\u6027\u80FD\u3002</p><h2 id="synchronized\u7684\u4E0D\u8DB3\u4E4B\u5904" tabindex="-1"><a class="header-anchor" href="#synchronized\u7684\u4E0D\u8DB3\u4E4B\u5904" aria-hidden="true">#</a> synchronized\u7684\u4E0D\u8DB3\u4E4B\u5904</h2><p>\u6211\u4EEC\u5148\u6765\u770B\u770B<code>synchronized</code>\u6709\u4EC0\u4E48\u4E0D\u8DB3\u4E4B\u5904\u3002</p><ul><li>\u5982\u679C\u4E34\u754C\u533A\u662F\u53EA\u8BFB\u64CD\u4F5C\uFF0C\u5176\u5B9E\u53EF\u4EE5\u591A\u7EBF\u7A0B\u4E00\u8D77\u6267\u884C\uFF0C\u4F46\u4F7F\u7528synchronized\u7684\u8BDD\uFF0C<strong>\u540C\u4E00\u65F6\u95F4\u53EA\u80FD\u6709\u4E00\u4E2A\u7EBF\u7A0B\u6267\u884C</strong>\u3002</li><li>synchronized\u65E0\u6CD5\u77E5\u9053\u7EBF\u7A0B\u6709\u6CA1\u6709\u6210\u529F\u83B7\u53D6\u5230\u9501</li><li>\u4F7F\u7528synchronized\uFF0C\u5982\u679C\u4E34\u754C\u533A\u56E0\u4E3AIO\u6216\u8005sleep\u65B9\u6CD5\u7B49\u539F\u56E0\u963B\u585E\u4E86\uFF0C\u800C\u5F53\u524D\u7EBF\u7A0B\u53C8\u6CA1\u6709\u91CA\u653E\u9501\uFF0C\u5C31\u4F1A\u5BFC\u81F4<strong>\u6240\u6709\u7EBF\u7A0B\u7B49\u5F85</strong>\u3002</li></ul><p>\u800C\u8FD9\u4E9B\u90FD\u662Flocks\u5305\u4E0B\u7684\u9501\u53EF\u4EE5\u89E3\u51B3\u7684\u3002</p><h2 id="\u9501\u7684\u51E0\u79CD\u5206\u7C7B" tabindex="-1"><a class="header-anchor" href="#\u9501\u7684\u51E0\u79CD\u5206\u7C7B" aria-hidden="true">#</a> \u9501\u7684\u51E0\u79CD\u5206\u7C7B</h2><p>\u9501\u53EF\u4EE5\u6839\u636E\u4EE5\u4E0B\u51E0\u79CD\u65B9\u5F0F\u6765\u8FDB\u884C\u5206\u7C7B\uFF0C\u4E0B\u9762\u6211\u4EEC\u9010\u4E00\u4ECB\u7ECD\u3002</p><h3 id="\u53EF\u91CD\u5165\u9501\u548C\u975E\u53EF\u91CD\u5165\u9501" tabindex="-1"><a class="header-anchor" href="#\u53EF\u91CD\u5165\u9501\u548C\u975E\u53EF\u91CD\u5165\u9501" aria-hidden="true">#</a> \u53EF\u91CD\u5165\u9501\u548C\u975E\u53EF\u91CD\u5165\u9501</h3><p>\u6240\u8C13\u91CD\u5165\u9501\uFF0C\u987E\u540D\u601D\u4E49\u3002\u5C31\u662F\u652F\u6301\u91CD\u65B0\u8FDB\u5165\u7684\u9501\uFF0C\u4E5F\u5C31\u662F\u8BF4\u8FD9\u4E2A\u9501\u652F\u6301\u4E00\u4E2A<strong>\u7EBF\u7A0B\u5BF9\u8D44\u6E90\u91CD\u590D\u52A0\u9501</strong>\u3002</p><p>synchronized\u5173\u952E\u5B57\u5C31\u662F\u4F7F\u7528\u7684\u91CD\u5165\u9501\u3002\u6BD4\u5982\u8BF4\uFF0C\u4F60\u5728\u4E00\u4E2Asynchronized\u5B9E\u4F8B\u65B9\u6CD5\u91CC\u9762\u8C03\u7528\u53E6\u4E00\u4E2A\u672C\u5B9E\u4F8B\u7684synchronized\u5B9E\u4F8B\u65B9\u6CD5\uFF0C\u5B83\u53EF\u4EE5\u91CD\u65B0\u8FDB\u5165\u8FD9\u4E2A\u9501\uFF0C\u4E0D\u4F1A\u51FA\u73B0\u4EFB\u4F55\u5F02\u5E38\u3002</p><p>\u5982\u679C\u6211\u4EEC\u81EA\u5DF1\u5728\u7EE7\u627FAQS\u5B9E\u73B0\u540C\u6B65\u5668\u7684\u65F6\u5019\uFF0C\u6CA1\u6709\u8003\u8651\u5230\u5360\u6709\u9501\u7684\u7EBF\u7A0B\u518D\u6B21\u83B7\u53D6\u9501\u7684\u573A\u666F\uFF0C\u53EF\u80FD\u5C31\u4F1A\u5BFC\u81F4\u7EBF\u7A0B\u963B\u585E\uFF0C\u90A3\u8FD9\u4E2A\u5C31\u662F\u4E00\u4E2A\u201C\u975E\u53EF\u91CD\u5165\u9501\u201D\u3002</p><p><code>ReentrantLock</code>\u7684\u4E2D\u6587\u610F\u601D\u5C31\u662F\u53EF\u91CD\u5165\u9501\u3002\u4E5F\u662F\u672C\u6587\u540E\u7EED\u8981\u4ECB\u7ECD\u7684\u91CD\u70B9\u7C7B\u3002</p><h3 id="\u516C\u5E73\u9501\u4E0E\u975E\u516C\u5E73\u9501" tabindex="-1"><a class="header-anchor" href="#\u516C\u5E73\u9501\u4E0E\u975E\u516C\u5E73\u9501" aria-hidden="true">#</a> \u516C\u5E73\u9501\u4E0E\u975E\u516C\u5E73\u9501</h3><p>\u8FD9\u91CC\u7684\u201C\u516C\u5E73\u201D\uFF0C\u5176\u5B9E\u901A\u4FD7\u610F\u4E49\u6765\u8BF4\u5C31\u662F\u201C\u5148\u6765\u540E\u5230\u201D\uFF0C\u4E5F\u5C31\u662FFIFO\u3002\u5982\u679C\u5BF9\u4E00\u4E2A\u9501\u6765\u8BF4\uFF0C\u5148\u5BF9\u9501\u83B7\u53D6\u8BF7\u6C42\u7684\u7EBF\u7A0B\u4E00\u5B9A\u4F1A\u5148\u88AB\u6EE1\u8DB3\uFF0C\u540E\u5BF9\u9501\u83B7\u53D6\u8BF7\u6C42\u7684\u7EBF\u7A0B\u540E\u88AB\u6EE1\u8DB3\uFF0C\u90A3\u8FD9\u4E2A\u9501\u5C31\u662F\u516C\u5E73\u7684\u3002\u53CD\u4E4B\uFF0C\u90A3\u5C31\u662F\u4E0D\u516C\u5E73\u7684\u3002</p><p>\u4E00\u822C\u60C5\u51B5\u4E0B\uFF0C<strong>\u975E\u516C\u5E73\u9501\u80FD\u63D0\u5347\u4E00\u5B9A\u7684\u6548\u7387\u3002\u4F46\u662F\u975E\u516C\u5E73\u9501\u53EF\u80FD\u4F1A\u53D1\u751F\u7EBF\u7A0B\u9965\u997F\uFF08\u6709\u4E00\u4E9B\u7EBF\u7A0B\u957F\u65F6\u95F4\u5F97\u4E0D\u5230\u9501\uFF09\u7684\u60C5\u51B5</strong>\u3002\u6240\u4EE5\u8981\u6839\u636E\u5B9E\u9645\u7684\u9700\u6C42\u6765\u9009\u62E9\u975E\u516C\u5E73\u9501\u548C\u516C\u5E73\u9501\u3002</p><p>ReentrantLock\u652F\u6301\u975E\u516C\u5E73\u9501\u548C\u516C\u5E73\u9501\u4E24\u79CD\u3002</p><h3 id="\u8BFB\u5199\u9501\u548C\u6392\u5B83\u9501" tabindex="-1"><a class="header-anchor" href="#\u8BFB\u5199\u9501\u548C\u6392\u5B83\u9501" aria-hidden="true">#</a> \u8BFB\u5199\u9501\u548C\u6392\u5B83\u9501</h3><p>\u6211\u4EEC\u524D\u9762\u8BB2\u5230\u7684synchronized\u7528\u7684\u9501\u548CReentrantLock\uFF0C\u5176\u5B9E\u90FD\u662F\u201C\u6392\u5B83\u9501\u201D\u3002\u4E5F\u5C31\u662F\u8BF4\uFF0C\u8FD9\u4E9B\u9501\u5728\u540C\u4E00\u65F6\u523B\u53EA\u5141\u8BB8\u4E00\u4E2A\u7EBF\u7A0B\u8FDB\u884C\u8BBF\u95EE\u3002</p><p>\u800C\u8BFB\u5199\u9501\u53EF\u4EE5\u5728\u540C\u4E00\u65F6\u523B\u5141\u8BB8\u591A\u4E2A\u8BFB\u7EBF\u7A0B\u8BBF\u95EE\u3002Java\u63D0\u4F9B\u4E86ReentrantReadWriteLock\u7C7B\u4F5C\u4E3A\u8BFB\u5199\u9501\u7684\u9ED8\u8BA4\u5B9E\u73B0\uFF0C\u5185\u90E8\u7EF4\u62A4\u4E86\u4E24\u4E2A\u9501\uFF1A\u4E00\u4E2A\u8BFB\u9501\uFF0C\u4E00\u4E2A\u5199\u9501\u3002\u901A\u8FC7\u5206\u79BB\u8BFB\u9501\u548C\u5199\u9501\uFF0C\u4F7F\u5F97\u5728\u201C\u8BFB\u591A\u5199\u5C11\u201D\u7684\u73AF\u5883\u4E0B\uFF0C\u5927\u5927\u5730\u63D0\u9AD8\u4E86\u6027\u80FD\u3002</p><blockquote><p>\u6CE8\u610F\uFF0C\u5373\u4F7F\u7528\u8BFB\u5199\u9501\uFF0C\u5728\u5199\u7EBF\u7A0B\u8BBF\u95EE\u65F6\uFF0C\u6240\u6709\u7684\u8BFB\u7EBF\u7A0B\u548C\u5176\u5B83\u5199\u7EBF\u7A0B\u5747\u88AB\u963B\u585E\u3002</p></blockquote><p><strong>\u53EF\u89C1\uFF0C\u53EA\u662Fsynchronized\u662F\u8FDC\u8FDC\u4E0D\u80FD\u6EE1\u8DB3\u591A\u6837\u5316\u7684\u4E1A\u52A1\u5BF9\u9501\u7684\u8981\u6C42\u7684</strong>\u3002\u63A5\u4E0B\u6765\u6211\u4EEC\u4ECB\u7ECD\u4E00\u4E0BJDK\u4E2D\u6709\u5173\u9501\u7684\u4E00\u4E9B\u63A5\u53E3\u548C\u7C7B\u3002</p><h2 id="jdk\u4E2D\u6709\u5173\u9501\u7684\u4E00\u4E9B\u63A5\u53E3\u548C\u7C7B" tabindex="-1"><a class="header-anchor" href="#jdk\u4E2D\u6709\u5173\u9501\u7684\u4E00\u4E9B\u63A5\u53E3\u548C\u7C7B" aria-hidden="true">#</a> JDK\u4E2D\u6709\u5173\u9501\u7684\u4E00\u4E9B\u63A5\u53E3\u548C\u7C7B</h2><p>\u4F17\u6240\u5468\u77E5\uFF0CJDK\u4E2D\u5173\u4E8E\u5E76\u53D1\u7684\u7C7B\u5927\u591A\u90FD\u5728<code>java.util.concurrent</code>\uFF08\u4EE5\u4E0B\u7B80\u79F0juc\uFF09\u5305\u4E0B\u3002\u800Cjuc.locks\u5305\u770B\u540D\u5B57\u5C31\u77E5\u9053\uFF0C\u662F\u63D0\u4F9B\u4E86\u4E00\u4E9B\u5E76\u53D1\u9501\u7684\u5DE5\u5177\u7C7B\u7684\u3002\u524D\u9762\u6211\u4EEC\u4ECB\u7ECD\u7684AQS\uFF08AbstractQueuedSynchronizer\uFF09\u5C31\u662F\u5728\u8FD9\u4E2A\u5305\u4E0B\u3002\u4E0B\u9762\u5206\u522B\u4ECB\u7ECD\u4E00\u4E0B\u8FD9\u4E2A\u5305\u4E0B\u7684\u7C7B\u548C\u63A5\u53E3\u4EE5\u53CA\u5B83\u4EEC\u4E4B\u95F4\u7684\u5173\u7CFB\u3002</p><h3 id="\u62BD\u8C61\u7C7Baqs-aqls-aos" tabindex="-1"><a class="header-anchor" href="#\u62BD\u8C61\u7C7Baqs-aqls-aos" aria-hidden="true">#</a> \u62BD\u8C61\u7C7BAQS/AQLS/AOS</h3><p>\u8FD9\u4E09\u4E2A\u62BD\u8C61\u7C7B\u6709\u4E00\u5B9A\u7684\u5173\u7CFB\uFF0C\u6240\u4EE5\u8FD9\u91CC\u653E\u5230\u4E00\u8D77\u8BB2\u3002</p><p>\u9996\u5148\u6211\u4EEC\u770B<strong>AQS</strong>\uFF08AbstractQueuedSynchronizer\uFF09\uFF0C\u4E4B\u524D\u4E13\u95E8\u6709\u7AE0\u8282\u4ECB\u7ECD\u8FD9\u4E2A\u7C7B\uFF0C\u5B83\u662F\u5728JDK 1.5 \u53D1\u5E03\u7684\uFF0C\u63D0\u4F9B\u4E86\u4E00\u4E2A\u201C\u961F\u5217\u540C\u6B65\u5668\u201D\u7684\u57FA\u672C\u529F\u80FD\u5B9E\u73B0\u3002\u800CAQS\u91CC\u9762\u7684\u201C\u8D44\u6E90\u201D\u662F\u7528\u4E00\u4E2A<code>int</code>\u7C7B\u578B\u7684\u6570\u636E\u6765\u8868\u793A\u7684\uFF0C\u6709\u65F6\u5019\u6211\u4EEC\u7684\u4E1A\u52A1\u9700\u6C42\u8D44\u6E90\u7684\u6570\u91CF\u8D85\u51FA\u4E86<code>int</code>\u7684\u8303\u56F4\uFF0C\u6240\u4EE5\u5728JDK 1.6 \u4E2D\uFF0C\u591A\u4E86\u4E00\u4E2A<strong>AQLS</strong>\uFF08AbstractQueuedLongSynchronizer\uFF09\u3002\u5B83\u7684\u4EE3\u7801\u8DDFAQS\u51E0\u4E4E\u4E00\u6837\uFF0C\u53EA\u662F\u628A\u8D44\u6E90\u7684\u7C7B\u578B\u53D8\u6210\u4E86<code>long</code>\u7C7B\u578B\u3002</p><p>AQS\u548CAQLS\u90FD\u7EE7\u627F\u4E86\u4E00\u4E2A\u7C7B\u53EB<strong>AOS</strong>\uFF08AbstractOwnableSynchronizer\uFF09\u3002\u8FD9\u4E2A\u7C7B\u4E5F\u662F\u5728JDK 1.6 \u4E2D\u51FA\u73B0\u7684\u3002\u8FD9\u4E2A\u7C7B\u53EA\u6709\u51E0\u884C\u7B80\u5355\u7684\u4EE3\u7801\u3002\u4ECE\u6E90\u7801\u7C7B\u4E0A\u7684\u6CE8\u91CA\u53EF\u4EE5\u77E5\u9053\uFF0C\u5B83\u662F\u7528\u4E8E\u8868\u793A\u9501\u4E0E\u6301\u6709\u8005\u4E4B\u95F4\u7684\u5173\u7CFB\uFF08\u72EC\u5360\u6A21\u5F0F\uFF09\u3002\u53EF\u4EE5\u770B\u4E00\u4E0B\u5B83\u7684\u4E3B\u8981\u65B9\u6CD5\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token comment">// \u72EC\u5360\u6A21\u5F0F\uFF0C\u9501\u7684\u6301\u6709\u8005  </span>
+import{_ as t}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o,c,a as n,b as a,e as l,d as e}from"./app.615e41d8.js";const i={},r=l(`<h1 id="\u5927\u81F4\u4E86\u89E3\u4E0Bjava\u7684\u9501\u63A5\u53E3\u548C\u9501" tabindex="-1"><a class="header-anchor" href="#\u5927\u81F4\u4E86\u89E3\u4E0Bjava\u7684\u9501\u63A5\u53E3\u548C\u9501" aria-hidden="true">#</a> \u5927\u81F4\u4E86\u89E3\u4E0BJava\u7684\u9501\u63A5\u53E3\u548C\u9501</h1><p>\u524D\u9762\u6211\u4EEC\u4ECB\u7ECD\u4E86Java\u539F\u751F\u7684\u9501\u2014\u2014\u57FA\u4E8E\u5BF9\u8C61\u7684\u9501\uFF0C\u5B83\u4E00\u822C\u662F\u914D\u5408synchronized\u5173\u952E\u5B57\u6765\u4F7F\u7528\u7684\u3002\u5B9E\u9645\u4E0A\uFF0CJava\u5728<code>java.util.concurrent.locks</code>\u5305\u4E0B\uFF0C\u8FD8\u4E3A\u6211\u4EEC\u63D0\u4F9B\u4E86\u51E0\u4E2A\u5173\u4E8E\u9501\u7684\u7C7B\u548C\u63A5\u53E3\u3002\u5B83\u4EEC\u6709\u66F4\u5F3A\u5927\u7684\u529F\u80FD\u6216\u66F4\u9AD8\u7684\u6027\u80FD\u3002</p><h2 id="synchronized\u7684\u4E0D\u8DB3\u4E4B\u5904" tabindex="-1"><a class="header-anchor" href="#synchronized\u7684\u4E0D\u8DB3\u4E4B\u5904" aria-hidden="true">#</a> synchronized\u7684\u4E0D\u8DB3\u4E4B\u5904</h2><p>\u6211\u4EEC\u5148\u6765\u770B\u770B<code>synchronized</code>\u6709\u4EC0\u4E48\u4E0D\u8DB3\u4E4B\u5904\u3002</p><ul><li>\u5982\u679C\u4E34\u754C\u533A\u662F\u53EA\u8BFB\u64CD\u4F5C\uFF0C\u5176\u5B9E\u53EF\u4EE5\u591A\u7EBF\u7A0B\u4E00\u8D77\u6267\u884C\uFF0C\u4F46\u4F7F\u7528synchronized\u7684\u8BDD\uFF0C<strong>\u540C\u4E00\u65F6\u95F4\u53EA\u80FD\u6709\u4E00\u4E2A\u7EBF\u7A0B\u6267\u884C</strong>\u3002</li><li>synchronized\u65E0\u6CD5\u77E5\u9053\u7EBF\u7A0B\u6709\u6CA1\u6709\u6210\u529F\u83B7\u53D6\u5230\u9501</li><li>\u4F7F\u7528synchronized\uFF0C\u5982\u679C\u4E34\u754C\u533A\u56E0\u4E3AIO\u6216\u8005sleep\u65B9\u6CD5\u7B49\u539F\u56E0\u963B\u585E\u4E86\uFF0C\u800C\u5F53\u524D\u7EBF\u7A0B\u53C8\u6CA1\u6709\u91CA\u653E\u9501\uFF0C\u5C31\u4F1A\u5BFC\u81F4<strong>\u6240\u6709\u7EBF\u7A0B\u7B49\u5F85</strong>\u3002</li></ul><p>\u800C\u8FD9\u4E9B\u90FD\u662Flocks\u5305\u4E0B\u7684\u9501\u53EF\u4EE5\u89E3\u51B3\u7684\u3002</p><h2 id="\u9501\u7684\u51E0\u79CD\u5206\u7C7B" tabindex="-1"><a class="header-anchor" href="#\u9501\u7684\u51E0\u79CD\u5206\u7C7B" aria-hidden="true">#</a> \u9501\u7684\u51E0\u79CD\u5206\u7C7B</h2><p>\u9501\u53EF\u4EE5\u6839\u636E\u4EE5\u4E0B\u51E0\u79CD\u65B9\u5F0F\u6765\u8FDB\u884C\u5206\u7C7B\uFF0C\u4E0B\u9762\u6211\u4EEC\u9010\u4E00\u4ECB\u7ECD\u3002</p><h3 id="\u53EF\u91CD\u5165\u9501\u548C\u975E\u53EF\u91CD\u5165\u9501" tabindex="-1"><a class="header-anchor" href="#\u53EF\u91CD\u5165\u9501\u548C\u975E\u53EF\u91CD\u5165\u9501" aria-hidden="true">#</a> \u53EF\u91CD\u5165\u9501\u548C\u975E\u53EF\u91CD\u5165\u9501</h3><p>\u6240\u8C13\u91CD\u5165\u9501\uFF0C\u987E\u540D\u601D\u4E49\u3002\u5C31\u662F\u652F\u6301\u91CD\u65B0\u8FDB\u5165\u7684\u9501\uFF0C\u4E5F\u5C31\u662F\u8BF4\u8FD9\u4E2A\u9501\u652F\u6301\u4E00\u4E2A<strong>\u7EBF\u7A0B\u5BF9\u8D44\u6E90\u91CD\u590D\u52A0\u9501</strong>\u3002</p><p>synchronized\u5173\u952E\u5B57\u5C31\u662F\u4F7F\u7528\u7684\u91CD\u5165\u9501\u3002\u6BD4\u5982\u8BF4\uFF0C\u4F60\u5728\u4E00\u4E2Asynchronized\u5B9E\u4F8B\u65B9\u6CD5\u91CC\u9762\u8C03\u7528\u53E6\u4E00\u4E2A\u672C\u5B9E\u4F8B\u7684synchronized\u5B9E\u4F8B\u65B9\u6CD5\uFF0C\u5B83\u53EF\u4EE5\u91CD\u65B0\u8FDB\u5165\u8FD9\u4E2A\u9501\uFF0C\u4E0D\u4F1A\u51FA\u73B0\u4EFB\u4F55\u5F02\u5E38\u3002</p><p>\u5982\u679C\u6211\u4EEC\u81EA\u5DF1\u5728\u7EE7\u627FAQS\u5B9E\u73B0\u540C\u6B65\u5668\u7684\u65F6\u5019\uFF0C\u6CA1\u6709\u8003\u8651\u5230\u5360\u6709\u9501\u7684\u7EBF\u7A0B\u518D\u6B21\u83B7\u53D6\u9501\u7684\u573A\u666F\uFF0C\u53EF\u80FD\u5C31\u4F1A\u5BFC\u81F4\u7EBF\u7A0B\u963B\u585E\uFF0C\u90A3\u8FD9\u4E2A\u5C31\u662F\u4E00\u4E2A\u201C\u975E\u53EF\u91CD\u5165\u9501\u201D\u3002</p><p><code>ReentrantLock</code>\u7684\u4E2D\u6587\u610F\u601D\u5C31\u662F\u53EF\u91CD\u5165\u9501\u3002\u4E5F\u662F\u672C\u6587\u540E\u7EED\u8981\u4ECB\u7ECD\u7684\u91CD\u70B9\u7C7B\u3002</p><h3 id="\u516C\u5E73\u9501\u4E0E\u975E\u516C\u5E73\u9501" tabindex="-1"><a class="header-anchor" href="#\u516C\u5E73\u9501\u4E0E\u975E\u516C\u5E73\u9501" aria-hidden="true">#</a> \u516C\u5E73\u9501\u4E0E\u975E\u516C\u5E73\u9501</h3><p>\u8FD9\u91CC\u7684\u201C\u516C\u5E73\u201D\uFF0C\u5176\u5B9E\u901A\u4FD7\u610F\u4E49\u6765\u8BF4\u5C31\u662F\u201C\u5148\u6765\u540E\u5230\u201D\uFF0C\u4E5F\u5C31\u662FFIFO\u3002\u5982\u679C\u5BF9\u4E00\u4E2A\u9501\u6765\u8BF4\uFF0C\u5148\u5BF9\u9501\u83B7\u53D6\u8BF7\u6C42\u7684\u7EBF\u7A0B\u4E00\u5B9A\u4F1A\u5148\u88AB\u6EE1\u8DB3\uFF0C\u540E\u5BF9\u9501\u83B7\u53D6\u8BF7\u6C42\u7684\u7EBF\u7A0B\u540E\u88AB\u6EE1\u8DB3\uFF0C\u90A3\u8FD9\u4E2A\u9501\u5C31\u662F\u516C\u5E73\u7684\u3002\u53CD\u4E4B\uFF0C\u90A3\u5C31\u662F\u4E0D\u516C\u5E73\u7684\u3002</p><p>\u4E00\u822C\u60C5\u51B5\u4E0B\uFF0C<strong>\u975E\u516C\u5E73\u9501\u80FD\u63D0\u5347\u4E00\u5B9A\u7684\u6548\u7387\u3002\u4F46\u662F\u975E\u516C\u5E73\u9501\u53EF\u80FD\u4F1A\u53D1\u751F\u7EBF\u7A0B\u9965\u997F\uFF08\u6709\u4E00\u4E9B\u7EBF\u7A0B\u957F\u65F6\u95F4\u5F97\u4E0D\u5230\u9501\uFF09\u7684\u60C5\u51B5</strong>\u3002\u6240\u4EE5\u8981\u6839\u636E\u5B9E\u9645\u7684\u9700\u6C42\u6765\u9009\u62E9\u975E\u516C\u5E73\u9501\u548C\u516C\u5E73\u9501\u3002</p><p>ReentrantLock\u652F\u6301\u975E\u516C\u5E73\u9501\u548C\u516C\u5E73\u9501\u4E24\u79CD\u3002</p><h3 id="\u8BFB\u5199\u9501\u548C\u6392\u5B83\u9501" tabindex="-1"><a class="header-anchor" href="#\u8BFB\u5199\u9501\u548C\u6392\u5B83\u9501" aria-hidden="true">#</a> \u8BFB\u5199\u9501\u548C\u6392\u5B83\u9501</h3><p>\u6211\u4EEC\u524D\u9762\u8BB2\u5230\u7684synchronized\u7528\u7684\u9501\u548CReentrantLock\uFF0C\u5176\u5B9E\u90FD\u662F\u201C\u6392\u5B83\u9501\u201D\u3002\u4E5F\u5C31\u662F\u8BF4\uFF0C\u8FD9\u4E9B\u9501\u5728\u540C\u4E00\u65F6\u523B\u53EA\u5141\u8BB8\u4E00\u4E2A\u7EBF\u7A0B\u8FDB\u884C\u8BBF\u95EE\u3002</p><p>\u800C\u8BFB\u5199\u9501\u53EF\u4EE5\u5728\u540C\u4E00\u65F6\u523B\u5141\u8BB8\u591A\u4E2A\u8BFB\u7EBF\u7A0B\u8BBF\u95EE\u3002Java\u63D0\u4F9B\u4E86ReentrantReadWriteLock\u7C7B\u4F5C\u4E3A\u8BFB\u5199\u9501\u7684\u9ED8\u8BA4\u5B9E\u73B0\uFF0C\u5185\u90E8\u7EF4\u62A4\u4E86\u4E24\u4E2A\u9501\uFF1A\u4E00\u4E2A\u8BFB\u9501\uFF0C\u4E00\u4E2A\u5199\u9501\u3002\u901A\u8FC7\u5206\u79BB\u8BFB\u9501\u548C\u5199\u9501\uFF0C\u4F7F\u5F97\u5728\u201C\u8BFB\u591A\u5199\u5C11\u201D\u7684\u73AF\u5883\u4E0B\uFF0C\u5927\u5927\u5730\u63D0\u9AD8\u4E86\u6027\u80FD\u3002</p><blockquote><p>\u6CE8\u610F\uFF0C\u5373\u4F7F\u7528\u8BFB\u5199\u9501\uFF0C\u5728\u5199\u7EBF\u7A0B\u8BBF\u95EE\u65F6\uFF0C\u6240\u6709\u7684\u8BFB\u7EBF\u7A0B\u548C\u5176\u5B83\u5199\u7EBF\u7A0B\u5747\u88AB\u963B\u585E\u3002</p></blockquote><p><strong>\u53EF\u89C1\uFF0C\u53EA\u662Fsynchronized\u662F\u8FDC\u8FDC\u4E0D\u80FD\u6EE1\u8DB3\u591A\u6837\u5316\u7684\u4E1A\u52A1\u5BF9\u9501\u7684\u8981\u6C42\u7684</strong>\u3002\u63A5\u4E0B\u6765\u6211\u4EEC\u4ECB\u7ECD\u4E00\u4E0BJDK\u4E2D\u6709\u5173\u9501\u7684\u4E00\u4E9B\u63A5\u53E3\u548C\u7C7B\u3002</p><h2 id="jdk\u4E2D\u6709\u5173\u9501\u7684\u4E00\u4E9B\u63A5\u53E3\u548C\u7C7B" tabindex="-1"><a class="header-anchor" href="#jdk\u4E2D\u6709\u5173\u9501\u7684\u4E00\u4E9B\u63A5\u53E3\u548C\u7C7B" aria-hidden="true">#</a> JDK\u4E2D\u6709\u5173\u9501\u7684\u4E00\u4E9B\u63A5\u53E3\u548C\u7C7B</h2><p>\u4F17\u6240\u5468\u77E5\uFF0CJDK\u4E2D\u5173\u4E8E\u5E76\u53D1\u7684\u7C7B\u5927\u591A\u90FD\u5728<code>java.util.concurrent</code>\uFF08\u4EE5\u4E0B\u7B80\u79F0juc\uFF09\u5305\u4E0B\u3002\u800Cjuc.locks\u5305\u770B\u540D\u5B57\u5C31\u77E5\u9053\uFF0C\u662F\u63D0\u4F9B\u4E86\u4E00\u4E9B\u5E76\u53D1\u9501\u7684\u5DE5\u5177\u7C7B\u7684\u3002\u524D\u9762\u6211\u4EEC\u4ECB\u7ECD\u7684AQS\uFF08AbstractQueuedSynchronizer\uFF09\u5C31\u662F\u5728\u8FD9\u4E2A\u5305\u4E0B\u3002\u4E0B\u9762\u5206\u522B\u4ECB\u7ECD\u4E00\u4E0B\u8FD9\u4E2A\u5305\u4E0B\u7684\u7C7B\u548C\u63A5\u53E3\u4EE5\u53CA\u5B83\u4EEC\u4E4B\u95F4\u7684\u5173\u7CFB\u3002</p><h3 id="\u62BD\u8C61\u7C7Baqs-aqls-aos" tabindex="-1"><a class="header-anchor" href="#\u62BD\u8C61\u7C7Baqs-aqls-aos" aria-hidden="true">#</a> \u62BD\u8C61\u7C7BAQS/AQLS/AOS</h3><p>\u8FD9\u4E09\u4E2A\u62BD\u8C61\u7C7B\u6709\u4E00\u5B9A\u7684\u5173\u7CFB\uFF0C\u6240\u4EE5\u8FD9\u91CC\u653E\u5230\u4E00\u8D77\u8BB2\u3002</p><p>\u9996\u5148\u6211\u4EEC\u770B<strong>AQS</strong>\uFF08AbstractQueuedSynchronizer\uFF09\uFF0C\u4E4B\u524D\u4E13\u95E8\u6709\u7AE0\u8282\u4ECB\u7ECD\u8FD9\u4E2A\u7C7B\uFF0C\u5B83\u662F\u5728JDK 1.5 \u53D1\u5E03\u7684\uFF0C\u63D0\u4F9B\u4E86\u4E00\u4E2A\u201C\u961F\u5217\u540C\u6B65\u5668\u201D\u7684\u57FA\u672C\u529F\u80FD\u5B9E\u73B0\u3002\u800CAQS\u91CC\u9762\u7684\u201C\u8D44\u6E90\u201D\u662F\u7528\u4E00\u4E2A<code>int</code>\u7C7B\u578B\u7684\u6570\u636E\u6765\u8868\u793A\u7684\uFF0C\u6709\u65F6\u5019\u6211\u4EEC\u7684\u4E1A\u52A1\u9700\u6C42\u8D44\u6E90\u7684\u6570\u91CF\u8D85\u51FA\u4E86<code>int</code>\u7684\u8303\u56F4\uFF0C\u6240\u4EE5\u5728JDK 1.6 \u4E2D\uFF0C\u591A\u4E86\u4E00\u4E2A<strong>AQLS</strong>\uFF08AbstractQueuedLongSynchronizer\uFF09\u3002\u5B83\u7684\u4EE3\u7801\u8DDFAQS\u51E0\u4E4E\u4E00\u6837\uFF0C\u53EA\u662F\u628A\u8D44\u6E90\u7684\u7C7B\u578B\u53D8\u6210\u4E86<code>long</code>\u7C7B\u578B\u3002</p><p>AQS\u548CAQLS\u90FD\u7EE7\u627F\u4E86\u4E00\u4E2A\u7C7B\u53EB<strong>AOS</strong>\uFF08AbstractOwnableSynchronizer\uFF09\u3002\u8FD9\u4E2A\u7C7B\u4E5F\u662F\u5728JDK 1.6 \u4E2D\u51FA\u73B0\u7684\u3002\u8FD9\u4E2A\u7C7B\u53EA\u6709\u51E0\u884C\u7B80\u5355\u7684\u4EE3\u7801\u3002\u4ECE\u6E90\u7801\u7C7B\u4E0A\u7684\u6CE8\u91CA\u53EF\u4EE5\u77E5\u9053\uFF0C\u5B83\u662F\u7528\u4E8E\u8868\u793A\u9501\u4E0E\u6301\u6709\u8005\u4E4B\u95F4\u7684\u5173\u7CFB\uFF08\u72EC\u5360\u6A21\u5F0F\uFF09\u3002\u53EF\u4EE5\u770B\u4E00\u4E0B\u5B83\u7684\u4E3B\u8981\u65B9\u6CD5\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token comment">// \u72EC\u5360\u6A21\u5F0F\uFF0C\u9501\u7684\u6301\u6709\u8005  </span>
 <span class="token keyword">private</span> <span class="token keyword">transient</span> <span class="token class-name">Thread</span> exclusiveOwnerThread<span class="token punctuation">;</span>  
 
 <span class="token comment">// \u8BBE\u7F6E\u9501\u6301\u6709\u8005  </span>
diff --git a/dist/assets/log4j.html.dbbf9c72.js b/dist/assets/log4j.html.0b4fd542.js
similarity index 99%
rename from dist/assets/log4j.html.dbbf9c72.js
rename to dist/assets/log4j.html.0b4fd542.js
index 1defb976..ac6bc13a 100644
--- a/dist/assets/log4j.html.dbbf9c72.js
+++ b/dist/assets/log4j.html.0b4fd542.js
@@ -1,4 +1,4 @@
-import{_ as p}from"./plugin-vue_export-helper.21dcd24c.js";import{r as t,o,c as l,a,b as c,e as s,d as n}from"./app.a0271b9c.js";const i={},u=s('<p>\u7A7A\u4E86\u7684\u65F6\u5019\uFF0C\u6211\u90FD\u4F1A\u5728\u7FA4\u91CC\u5077\u5077\u6478\u6478\u5730\u6F5C\u6C34\uFF0C\u5BF9\u5C0F\u4F19\u4F34\u4EEC\u7684\u4E00\u4E3E\u4E00\u52A8\u3001\u4E00\u8A00\u4E00\u884C\u7B5B\u67E5\u8BCA\u65AD\u3002\u4E00\u526F\u73ED\u4E3B\u4EFB\u7684\u5373\u65F6\u611F\uFF0C\u8BA9\u6211\u611F\u5230\u975E\u5E38\u7684\u5FEB\u4E50\uFF0C<strong>\u7565\u5FAE\u5939\u5E26\u4E00\u4E1D\u4E1D\u7684\u67AF\u71E5</strong>\u3002</p><p>\u8FD9\u4E0D\uFF0C\u6211\u5728\u6218\u56FD\u65F6\u4EE3\u8BFB\u8005\u7FA4\u91CC\u53D1\u73B0\u4E86\u8FD9\u4E48\u4E00\u4E32\u804A\u5929\u8BB0\u5F55\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/log4j-cacd9e88-4a4d-4127-a18b-f99b2e2296a3.png" alt=""></p><p>\u7ADF\u7136\u6709\u5C0F\u4F19\u4F34\u4E0D\u77E5\u9053\u201C\u6253\u65E5\u5FD7\u201D\u662F\u4EC0\u4E48\u610F\u601D\uFF0C\u4E0D\u77E5\u9053\u8BE5\u600E\u4E48\u5B66\u4E60\uFF0C\u8FD8\u6709\u5C0F\u4F19\u4F34\u56DE\u7B54\u8BF4\uFF0C\u53EA\u77E5\u9053 Log4j\uFF01</p><p>\u6709\u90A3\u4E48\u4E00\u523B\uFF0C\u6211\u906D\u53D7\u5230\u4E86\u4E00\u4E07\u70B9\u66B4\u51FB\uFF0C\u5185\u5FC3\u83AB\u540D\u7684\u4F24\u611F\uFF0C\u72B9\u5982\u4E00\u5339\u5782\u5934\u4E27\u6C14\u7684\u72D7\u3002\u56E0\u4E3A\u7F51\u7EDC\u4E0A\u603B\u6709\u4E00\u4E9B\u4E0D\u6000\u597D\u610F\u7684\u4EBA\u4E0D\u505C\u5730\u653B\u51FB\u6211\uFF0C\u8BF4\u6211\u5199\u7684\u6587\u7AE0\u5165\u95E8\uFF0C\u6BEB\u65E0\u6DF1\u5EA6\u2014\u2014\u4ED6\u4EEC\u5C31\u662F\u6211\u547D\u4E2D\u6CE8\u5B9A\u7684\u9ED1\u5B50\uFF0C\u4E0D\u4FE1\u4F60\u5230\u8109\u8109\u4E0A\u641C\u201C\u6C89\u9ED8\u738B\u4E8C\u201D\uFF0C\u5C31\u80FD\u770B\u5230\u4ED6\u4EEC\u6BEB\u65E0\u65B0\u610F\u7684\u62A8\u51FB\u3002</p><p>\u6211\u5C31\u60F3\u95EE\u4E00\u4E0B\uFF0C\u600E\u4E48\u4E86\uFF0C\u5165\u95E8\u7684\u6587\u7AE0\u6709\u5165\u95E8\u7684\u7FA4\u4F53\u9700\u8981\uFF0C\u800C\u6211\u6070\u597D\u5E2E\u52A9\u4E86\u8FD9\u4E48\u4E00\u5927\u6279\u521D\u5B66\u8005\uFF0C\u6211\u5E94\u8BE5\u53D7\u5230\u8912\u5956\u597D\u4E0D\u597D\uFF1F</p><p>\uFF08\u8BF4\u597D\u7684\u4E0D\u5728\u4E4E\uFF0C\u600E\u4E48\u5728\u4E4E\u8D77\u6765\u4E86\u5462\uFF1F\u624B\u52A8\u72D7\u5934\uFF09</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/log4j-58282c4d-8178-45bd-8ba3-26740f6dd4a3.png" alt=""></p><p>\u7BA1\u4ED6\u5462\uFF0C<strong>\u6211\u884C\u6211\u7D20</strong>\u5427\uFF0C\u4FDD\u6301\u521D\u5FC3\u4E0D\u6539\u5C31\u5BF9\u4E86\uFF01\u8FD9\u7BC7\u6587\u7AE0\u5C31\u6765\u8BF4\u8BF4 Log4j\uFF0C\u8FD9\u4E2A\u6253\u5370\u65E5\u5FD7\u7684\u9F3B\u7956\u3002Java \u4E2D\u7684\u65E5\u5FD7\u6253\u5370\u5176\u5B9E\u662F\u4E2A\u827A\u672F\u6D3B\uFF0C\u6211\u4FDD\u8BC1\uFF0C\u8FD9\u53E5\u8BDD\u7EDD\u4E0D\u662F\u5FFD\u60A0\u3002</p><p>\u4E8B\u5B9E\u8BC1\u660E\uFF0C\u6253\u5370\u65E5\u5FD7\u7EDD\u903C\u4F1A\u5F71\u54CD\u5230\u7A0B\u5E8F\u7684\u6027\u80FD\uFF0C\u8FD9\u662F\u4E0D\u53EF\u5426\u8BA4\u7684\uFF0C\u6BD5\u7ADF\u591A\u505A\u4E86\u4E00\u9879\u5DE5\u4F5C\u3002\u5C24\u5176\u662F\u5728\u4EA4\u6613\u975E\u5E38\u9891\u7E41\u7684\u7A0B\u5E8F\u91CC\uFF0C\u6D8C\u73B0\u5927\u91CF\u7684\u65E5\u5FD7\u786E\u5B9E\u4F1A\u6BD4\u8F83\u4F4E\u6548\u3002</p>',10),d=n("\u57FA\u4E8E\u6027\u80FD\u4E0A\u7684\u8003\u91CF\uFF0C\u5C0F\u4F19\u4F34\u4EEC\u5F88\u6709\u5FC5\u8981\u8BA4\u8BA4\u771F\u771F\u5730\u5B66\u4E60\u4E00\u4E0B\u5982\u4F55\u4F18\u96C5\u5730\u6253\u5370 Java \u65E5\u5FD7\u3002\u6BD5\u7ADF\uFF0C"),r={href:"https://mp.weixin.qq.com/s/vEt_ypvByKS-oCsuRmpgUw",target:"_blank",rel:"noopener noreferrer"},g=n("\u6027\u80FD"),k=n("\u662F\u4E00\u4E2A\u7A0B\u5E8F\u5458\u4F18\u4E0D\u4F18\u79C0\u7684\u91CD\u8981\u8003\u91CF\u3002"),v=s(`<h3 id="_01\u3001\u4E3A\u4EC0\u4E48\u9700\u8981\u5728-java-\u4E2D\u6253\u5370\u65E5\u5FD7" tabindex="-1"><a class="header-anchor" href="#_01\u3001\u4E3A\u4EC0\u4E48\u9700\u8981\u5728-java-\u4E2D\u6253\u5370\u65E5\u5FD7" aria-hidden="true">#</a> 01\u3001\u4E3A\u4EC0\u4E48\u9700\u8981\u5728 Java \u4E2D\u6253\u5370\u65E5\u5FD7</h3><p><code>System.out.println()</code> \u6050\u6015\u662F\u6211\u4EEC\u5728\u5B66\u4E60 Java \u7684\u65F6\u5019\uFF0C\u6700\u5E38\u7528\u7684\u4E00\u79CD\u6253\u5370\u65E5\u5FD7\u7684\u65B9\u5F0F\u4E86\uFF0C\u51E0\u4E4E\u6BCF\u4E2A Java \u521D\u5B66\u8005\u90FD\u8FD9\u6837\u5E72\u8FC7\uFF0C\u751A\u81F3\u4E00\u4E9B\u8001\u9E1F\u3002</p><p>\u4E4B\u6240\u4EE5\u8FD9\u6837\u6253\u5370\u65E5\u5FD7\uFF0C\u662F\u56E0\u4E3A\u5F88\u65B9\u4FBF\uFF0C\u4E0A\u624B\u96BE\u5EA6\u5F88\u4F4E\uFF0C\u5C24\u5176\u662F\u5728 IDEA \u7684\u5E2E\u52A9\u4E0B\uFF0C\u53EA\u9700\u5728\u952E\u76D8\u4E0A\u6309\u4E0B <code>so</code> \u4E24\u4E2A\u5B57\u6BCD\u5C31\u53EF\u4EE5\u8C03\u51FA <code>System.out.println()</code>\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/log4j-64dbb12b-8f6b-4ee3-ab5a-60519dd9112f.png" alt=""></p><p>\u5728\u672C\u5730\u73AF\u5883\u4E0B\uFF0C\u4F7F\u7528 <code>System.out.println()</code> \u6253\u5370\u65E5\u5FD7\u662F\u6CA1\u95EE\u9898\u7684\uFF0C\u53EF\u4EE5\u5728\u63A7\u5236\u53F0\u770B\u5230\u4FE1\u606F\u3002\u4F46\u5982\u679C\u662F\u5728\u751F\u4EA7\u73AF\u5883\u4E0B\u7684\u8BDD\uFF0C<code>System.out.println()</code> \u5C31\u53D8\u5F97\u6BEB\u65E0\u7528\u5904\u4E86\u3002</p><p>\u63A7\u5236\u53F0\u6253\u5370\u51FA\u7684\u4FE1\u606F\u5E76\u6CA1\u6709\u4FDD\u5B58\u5230\u65E5\u5FD7\u6587\u4EF6\u4E2D\uFF0C\u53EA\u80FD\u5373\u65F6\u67E5\u770B\uFF0C\u5728\u4E00\u5C4F\u65E5\u5FD7\u7684\u60C5\u51B5\u4E0B\u8FD8\u53EF\u4EE5\u63A5\u53D7\u3002\u5982\u679C\u65E5\u5FD7\u91CF\u975E\u5E38\u5927\uFF0C\u63A7\u5236\u53F0\u6839\u672C\u5C31\u88C5\u4E0D\u4E0B\u3002\u6240\u4EE5\u5C31\u9700\u8981\u66F4\u9AD8\u7EA7\u7684\u65E5\u5FD7\u8BB0\u5F55 API\uFF08\u6BD4\u5982 Log4j \u548C java.util.logging\uFF09\u3002</p><p>\u5B83\u4EEC\u53EF\u4EE5\u628A\u5927\u91CF\u7684\u65E5\u5FD7\u4FE1\u606F\u4FDD\u5B58\u5230\u6587\u4EF6\u4E2D\uFF0C\u5E76\u4E14\u63A7\u5236\u6BCF\u4E2A\u6587\u4EF6\u7684\u5927\u5C0F\uFF0C\u5982\u679C\u6EE1\u4E86\uFF0C\u5C31\u5B58\u50A8\u5230\u4E0B\u4E00\u4E2A\uFF0C\u65B9\u4FBF\u67E5\u627E\u3002</p><h3 id="_02\u3001\u9009\u62E9\u4E0D\u540C\u65E5\u5FD7\u7EA7\u522B\u7684\u91CD\u8981\u6027" tabindex="-1"><a class="header-anchor" href="#_02\u3001\u9009\u62E9\u4E0D\u540C\u65E5\u5FD7\u7EA7\u522B\u7684\u91CD\u8981\u6027" aria-hidden="true">#</a> 02\u3001\u9009\u62E9\u4E0D\u540C\u65E5\u5FD7\u7EA7\u522B\u7684\u91CD\u8981\u6027</h3><p>\u4F7F\u7528 Java \u65E5\u5FD7\u7684\u65F6\u5019\uFF0C\u4E00\u5B9A\u8981\u6CE8\u610F\u65E5\u5FD7\u7684\u7EA7\u522B\uFF0C\u6BD4\u5982\u5E38\u89C1\u7684 DEBUG\u3001INFO\u3001WARN \u548C ERROR\u3002</p><p>DEBUG \u7684\u7EA7\u522B\u6700\u4F4E\uFF0C\u5F53\u9700\u8981\u6253\u5370\u8C03\u8BD5\u4FE1\u606F\u7684\u8BDD\uFF0C\u5C31\u7528\u8FD9\u4E2A\u7EA7\u522B\uFF0C\u4E0D\u5EFA\u8BAE\u5728\u751F\u4EA7\u73AF\u5883\u4E0B\u4F7F\u7528\u3002</p><p>INFO \u7684\u7EA7\u522B\u9AD8\u4E00\u4E9B\uFF0C\u5F53\u4E00\u4E9B\u91CD\u8981\u7684\u4FE1\u606F\u9700\u8981\u6253\u5370\u7684\u65F6\u5019\uFF0C\u5C31\u7528\u8FD9\u4E2A\u3002</p><p>WARN\uFF0C\u7528\u6765\u8BB0\u5F55\u4E00\u4E9B\u8B66\u544A\u7C7B\u7684\u4FE1\u606F\uFF0C\u6BD4\u5982\u8BF4\u5BA2\u6237\u7AEF\u548C\u670D\u52A1\u7AEF\u7684\u8FDE\u63A5\u65AD\u5F00\u4E86\uFF0C\u6570\u636E\u5E93\u8FDE\u63A5\u4E22\u5931\u4E86\u3002</p><p>ERROR \u6BD4 WARN \u7684\u7EA7\u522B\u66F4\u9AD8\uFF0C\u7528\u6765\u8BB0\u5F55\u9519\u8BEF\u6216\u8005\u5F02\u5E38\u7684\u4FE1\u606F\u3002</p><p>FATAL\uFF0C\u5F53\u7A0B\u5E8F\u51FA\u73B0\u81F4\u547D\u9519\u8BEF\u7684\u65F6\u5019\u4F7F\u7528\uFF0C\u8FD9\u610F\u5473\u7740\u7A0B\u5E8F\u53EF\u80FD\u975E\u6B63\u5E38\u4E2D\u6B62\u4E86\u3002</p><p>OFF\uFF0C\u6700\u9AD8\u7EA7\u522B\uFF0C\u610F\u5473\u7740\u6240\u6709\u6D88\u606F\u90FD\u4E0D\u4F1A\u8F93\u51FA\u4E86\u3002</p><p>\u8FD9\u4E2A\u7EA7\u522B\u662F\u57FA\u4E8E Log4j \u7684\uFF0C\u548C java.util.logging \u6709\u6240\u4E0D\u540C\uFF0C\u540E\u8005\u63D0\u4F9B\u4E86\u66F4\u591A\u7684\u65E5\u5FD7\u7EA7\u522B\uFF0C\u6BD4\u5982\u8BF4 SEVERE\u3001FINER\u3001FINEST\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/log4j-4919cd20-e524-43a2-8b41-9eab6ac0c1e4.png" alt=""></p><h3 id="_03\u3001\u9519\u8BEF\u7684\u65E5\u5FD7\u8BB0\u5F55\u65B9\u5F0F\u662F\u5982\u4F55\u5F71\u54CD\u6027\u80FD\u7684" tabindex="-1"><a class="header-anchor" href="#_03\u3001\u9519\u8BEF\u7684\u65E5\u5FD7\u8BB0\u5F55\u65B9\u5F0F\u662F\u5982\u4F55\u5F71\u54CD\u6027\u80FD\u7684" aria-hidden="true">#</a> 03\u3001\u9519\u8BEF\u7684\u65E5\u5FD7\u8BB0\u5F55\u65B9\u5F0F\u662F\u5982\u4F55\u5F71\u54CD\u6027\u80FD\u7684</h3><p>\u4E3A\u4EC0\u4E48\u8BF4\u9519\u8BEF\u7684\u65E5\u5FD7\u8BB0\u5F55\u65B9\u5F0F\u4F1A\u5F71\u54CD\u7A0B\u5E8F\u7684\u6027\u80FD\u5462\uFF1F\u56E0\u4E3A\u65E5\u5FD7\u8BB0\u5F55\u7684\u6B21\u6570\u8D8A\u591A\uFF0C\u610F\u5473\u7740\u6267\u884C\u6587\u4EF6 IO \u64CD\u4F5C\u7684\u6B21\u6570\u5C31\u8D8A\u591A\uFF0C\u8FD9\u4E5F\u5C31\u610F\u5473\u7740\u4F1A\u5F71\u54CD\u5230\u7A0B\u5E8F\u7684\u6027\u80FD\uFF0C\u80FD get \u5427\uFF1F</p><p>\u867D\u7136\u8BF4\u666E\u901A\u786C\u76D8\u5347\u7EA7\u5230\u56FA\u6001\u786C\u76D8\u540E\uFF0C\u8BFB\u5199\u901F\u5EA6\u5FEB\u4E86\u5F88\u591A\uFF0C\u4F46\u78C1\u76D8\u76F8\u5BF9\u4E8E\u5185\u5B58\u548C CPU \u6765\u8BF4\uFF0C\u8FD8\u662F\u592A\u6162\u4E86\uFF01\u5C31\u50CF\u9A6C\u8F66\u548C\u5954\u9A70\u4E4B\u95F4\u7684\u901F\u5EA6\u5DEE\u8DDD\u3002</p><p>\u8FD9\u4E5F\u5C31\u662F\u4E3A\u4EC0\u4E48\u8981\u9009\u62E9\u65E5\u5FD7\u7EA7\u522B\u7684\u91CD\u8981\u6027\u3002\u5BF9\u4E8E\u7A0B\u5E8F\u6765\u8BF4\uFF0C\u8BB0\u5F55\u65E5\u5FD7\u662F\u5FC5\u9009\u9879\uFF0C\u6240\u4EE5\u80FD\u63A7\u5236\u7684\u5C31\u662F\u65E5\u5FD7\u7684\u7EA7\u522B\uFF0C\u4EE5\u53CA\u5728\u8FD9\u4E2A\u7EA7\u522B\u4E0A\u6253\u5370\u7684\u65E5\u5FD7\u3002</p><p>\u5BF9\u4E8E DEBUG \u7EA7\u522B\u7684\u65E5\u5FD7\u6765\u8BF4\uFF0C\u4E00\u5B9A\u8981\u4F7F\u7528\u4E0B\u9762\u7684\u65B9\u5F0F\u6765\u8BB0\u5F55\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">if</span><span class="token punctuation">(</span>logger<span class="token punctuation">.</span><span class="token function">isDebugEnabled</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">{</span> 
+import{_ as p}from"./plugin-vue_export-helper.21dcd24c.js";import{r as t,o,c as l,a,b as c,e as s,d as n}from"./app.615e41d8.js";const i={},u=s('<p>\u7A7A\u4E86\u7684\u65F6\u5019\uFF0C\u6211\u90FD\u4F1A\u5728\u7FA4\u91CC\u5077\u5077\u6478\u6478\u5730\u6F5C\u6C34\uFF0C\u5BF9\u5C0F\u4F19\u4F34\u4EEC\u7684\u4E00\u4E3E\u4E00\u52A8\u3001\u4E00\u8A00\u4E00\u884C\u7B5B\u67E5\u8BCA\u65AD\u3002\u4E00\u526F\u73ED\u4E3B\u4EFB\u7684\u5373\u65F6\u611F\uFF0C\u8BA9\u6211\u611F\u5230\u975E\u5E38\u7684\u5FEB\u4E50\uFF0C<strong>\u7565\u5FAE\u5939\u5E26\u4E00\u4E1D\u4E1D\u7684\u67AF\u71E5</strong>\u3002</p><p>\u8FD9\u4E0D\uFF0C\u6211\u5728\u6218\u56FD\u65F6\u4EE3\u8BFB\u8005\u7FA4\u91CC\u53D1\u73B0\u4E86\u8FD9\u4E48\u4E00\u4E32\u804A\u5929\u8BB0\u5F55\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/log4j-cacd9e88-4a4d-4127-a18b-f99b2e2296a3.png" alt=""></p><p>\u7ADF\u7136\u6709\u5C0F\u4F19\u4F34\u4E0D\u77E5\u9053\u201C\u6253\u65E5\u5FD7\u201D\u662F\u4EC0\u4E48\u610F\u601D\uFF0C\u4E0D\u77E5\u9053\u8BE5\u600E\u4E48\u5B66\u4E60\uFF0C\u8FD8\u6709\u5C0F\u4F19\u4F34\u56DE\u7B54\u8BF4\uFF0C\u53EA\u77E5\u9053 Log4j\uFF01</p><p>\u6709\u90A3\u4E48\u4E00\u523B\uFF0C\u6211\u906D\u53D7\u5230\u4E86\u4E00\u4E07\u70B9\u66B4\u51FB\uFF0C\u5185\u5FC3\u83AB\u540D\u7684\u4F24\u611F\uFF0C\u72B9\u5982\u4E00\u5339\u5782\u5934\u4E27\u6C14\u7684\u72D7\u3002\u56E0\u4E3A\u7F51\u7EDC\u4E0A\u603B\u6709\u4E00\u4E9B\u4E0D\u6000\u597D\u610F\u7684\u4EBA\u4E0D\u505C\u5730\u653B\u51FB\u6211\uFF0C\u8BF4\u6211\u5199\u7684\u6587\u7AE0\u5165\u95E8\uFF0C\u6BEB\u65E0\u6DF1\u5EA6\u2014\u2014\u4ED6\u4EEC\u5C31\u662F\u6211\u547D\u4E2D\u6CE8\u5B9A\u7684\u9ED1\u5B50\uFF0C\u4E0D\u4FE1\u4F60\u5230\u8109\u8109\u4E0A\u641C\u201C\u6C89\u9ED8\u738B\u4E8C\u201D\uFF0C\u5C31\u80FD\u770B\u5230\u4ED6\u4EEC\u6BEB\u65E0\u65B0\u610F\u7684\u62A8\u51FB\u3002</p><p>\u6211\u5C31\u60F3\u95EE\u4E00\u4E0B\uFF0C\u600E\u4E48\u4E86\uFF0C\u5165\u95E8\u7684\u6587\u7AE0\u6709\u5165\u95E8\u7684\u7FA4\u4F53\u9700\u8981\uFF0C\u800C\u6211\u6070\u597D\u5E2E\u52A9\u4E86\u8FD9\u4E48\u4E00\u5927\u6279\u521D\u5B66\u8005\uFF0C\u6211\u5E94\u8BE5\u53D7\u5230\u8912\u5956\u597D\u4E0D\u597D\uFF1F</p><p>\uFF08\u8BF4\u597D\u7684\u4E0D\u5728\u4E4E\uFF0C\u600E\u4E48\u5728\u4E4E\u8D77\u6765\u4E86\u5462\uFF1F\u624B\u52A8\u72D7\u5934\uFF09</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/log4j-58282c4d-8178-45bd-8ba3-26740f6dd4a3.png" alt=""></p><p>\u7BA1\u4ED6\u5462\uFF0C<strong>\u6211\u884C\u6211\u7D20</strong>\u5427\uFF0C\u4FDD\u6301\u521D\u5FC3\u4E0D\u6539\u5C31\u5BF9\u4E86\uFF01\u8FD9\u7BC7\u6587\u7AE0\u5C31\u6765\u8BF4\u8BF4 Log4j\uFF0C\u8FD9\u4E2A\u6253\u5370\u65E5\u5FD7\u7684\u9F3B\u7956\u3002Java \u4E2D\u7684\u65E5\u5FD7\u6253\u5370\u5176\u5B9E\u662F\u4E2A\u827A\u672F\u6D3B\uFF0C\u6211\u4FDD\u8BC1\uFF0C\u8FD9\u53E5\u8BDD\u7EDD\u4E0D\u662F\u5FFD\u60A0\u3002</p><p>\u4E8B\u5B9E\u8BC1\u660E\uFF0C\u6253\u5370\u65E5\u5FD7\u7EDD\u903C\u4F1A\u5F71\u54CD\u5230\u7A0B\u5E8F\u7684\u6027\u80FD\uFF0C\u8FD9\u662F\u4E0D\u53EF\u5426\u8BA4\u7684\uFF0C\u6BD5\u7ADF\u591A\u505A\u4E86\u4E00\u9879\u5DE5\u4F5C\u3002\u5C24\u5176\u662F\u5728\u4EA4\u6613\u975E\u5E38\u9891\u7E41\u7684\u7A0B\u5E8F\u91CC\uFF0C\u6D8C\u73B0\u5927\u91CF\u7684\u65E5\u5FD7\u786E\u5B9E\u4F1A\u6BD4\u8F83\u4F4E\u6548\u3002</p>',10),d=n("\u57FA\u4E8E\u6027\u80FD\u4E0A\u7684\u8003\u91CF\uFF0C\u5C0F\u4F19\u4F34\u4EEC\u5F88\u6709\u5FC5\u8981\u8BA4\u8BA4\u771F\u771F\u5730\u5B66\u4E60\u4E00\u4E0B\u5982\u4F55\u4F18\u96C5\u5730\u6253\u5370 Java \u65E5\u5FD7\u3002\u6BD5\u7ADF\uFF0C"),r={href:"https://mp.weixin.qq.com/s/vEt_ypvByKS-oCsuRmpgUw",target:"_blank",rel:"noopener noreferrer"},g=n("\u6027\u80FD"),k=n("\u662F\u4E00\u4E2A\u7A0B\u5E8F\u5458\u4F18\u4E0D\u4F18\u79C0\u7684\u91CD\u8981\u8003\u91CF\u3002"),v=s(`<h3 id="_01\u3001\u4E3A\u4EC0\u4E48\u9700\u8981\u5728-java-\u4E2D\u6253\u5370\u65E5\u5FD7" tabindex="-1"><a class="header-anchor" href="#_01\u3001\u4E3A\u4EC0\u4E48\u9700\u8981\u5728-java-\u4E2D\u6253\u5370\u65E5\u5FD7" aria-hidden="true">#</a> 01\u3001\u4E3A\u4EC0\u4E48\u9700\u8981\u5728 Java \u4E2D\u6253\u5370\u65E5\u5FD7</h3><p><code>System.out.println()</code> \u6050\u6015\u662F\u6211\u4EEC\u5728\u5B66\u4E60 Java \u7684\u65F6\u5019\uFF0C\u6700\u5E38\u7528\u7684\u4E00\u79CD\u6253\u5370\u65E5\u5FD7\u7684\u65B9\u5F0F\u4E86\uFF0C\u51E0\u4E4E\u6BCF\u4E2A Java \u521D\u5B66\u8005\u90FD\u8FD9\u6837\u5E72\u8FC7\uFF0C\u751A\u81F3\u4E00\u4E9B\u8001\u9E1F\u3002</p><p>\u4E4B\u6240\u4EE5\u8FD9\u6837\u6253\u5370\u65E5\u5FD7\uFF0C\u662F\u56E0\u4E3A\u5F88\u65B9\u4FBF\uFF0C\u4E0A\u624B\u96BE\u5EA6\u5F88\u4F4E\uFF0C\u5C24\u5176\u662F\u5728 IDEA \u7684\u5E2E\u52A9\u4E0B\uFF0C\u53EA\u9700\u5728\u952E\u76D8\u4E0A\u6309\u4E0B <code>so</code> \u4E24\u4E2A\u5B57\u6BCD\u5C31\u53EF\u4EE5\u8C03\u51FA <code>System.out.println()</code>\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/log4j-64dbb12b-8f6b-4ee3-ab5a-60519dd9112f.png" alt=""></p><p>\u5728\u672C\u5730\u73AF\u5883\u4E0B\uFF0C\u4F7F\u7528 <code>System.out.println()</code> \u6253\u5370\u65E5\u5FD7\u662F\u6CA1\u95EE\u9898\u7684\uFF0C\u53EF\u4EE5\u5728\u63A7\u5236\u53F0\u770B\u5230\u4FE1\u606F\u3002\u4F46\u5982\u679C\u662F\u5728\u751F\u4EA7\u73AF\u5883\u4E0B\u7684\u8BDD\uFF0C<code>System.out.println()</code> \u5C31\u53D8\u5F97\u6BEB\u65E0\u7528\u5904\u4E86\u3002</p><p>\u63A7\u5236\u53F0\u6253\u5370\u51FA\u7684\u4FE1\u606F\u5E76\u6CA1\u6709\u4FDD\u5B58\u5230\u65E5\u5FD7\u6587\u4EF6\u4E2D\uFF0C\u53EA\u80FD\u5373\u65F6\u67E5\u770B\uFF0C\u5728\u4E00\u5C4F\u65E5\u5FD7\u7684\u60C5\u51B5\u4E0B\u8FD8\u53EF\u4EE5\u63A5\u53D7\u3002\u5982\u679C\u65E5\u5FD7\u91CF\u975E\u5E38\u5927\uFF0C\u63A7\u5236\u53F0\u6839\u672C\u5C31\u88C5\u4E0D\u4E0B\u3002\u6240\u4EE5\u5C31\u9700\u8981\u66F4\u9AD8\u7EA7\u7684\u65E5\u5FD7\u8BB0\u5F55 API\uFF08\u6BD4\u5982 Log4j \u548C java.util.logging\uFF09\u3002</p><p>\u5B83\u4EEC\u53EF\u4EE5\u628A\u5927\u91CF\u7684\u65E5\u5FD7\u4FE1\u606F\u4FDD\u5B58\u5230\u6587\u4EF6\u4E2D\uFF0C\u5E76\u4E14\u63A7\u5236\u6BCF\u4E2A\u6587\u4EF6\u7684\u5927\u5C0F\uFF0C\u5982\u679C\u6EE1\u4E86\uFF0C\u5C31\u5B58\u50A8\u5230\u4E0B\u4E00\u4E2A\uFF0C\u65B9\u4FBF\u67E5\u627E\u3002</p><h3 id="_02\u3001\u9009\u62E9\u4E0D\u540C\u65E5\u5FD7\u7EA7\u522B\u7684\u91CD\u8981\u6027" tabindex="-1"><a class="header-anchor" href="#_02\u3001\u9009\u62E9\u4E0D\u540C\u65E5\u5FD7\u7EA7\u522B\u7684\u91CD\u8981\u6027" aria-hidden="true">#</a> 02\u3001\u9009\u62E9\u4E0D\u540C\u65E5\u5FD7\u7EA7\u522B\u7684\u91CD\u8981\u6027</h3><p>\u4F7F\u7528 Java \u65E5\u5FD7\u7684\u65F6\u5019\uFF0C\u4E00\u5B9A\u8981\u6CE8\u610F\u65E5\u5FD7\u7684\u7EA7\u522B\uFF0C\u6BD4\u5982\u5E38\u89C1\u7684 DEBUG\u3001INFO\u3001WARN \u548C ERROR\u3002</p><p>DEBUG \u7684\u7EA7\u522B\u6700\u4F4E\uFF0C\u5F53\u9700\u8981\u6253\u5370\u8C03\u8BD5\u4FE1\u606F\u7684\u8BDD\uFF0C\u5C31\u7528\u8FD9\u4E2A\u7EA7\u522B\uFF0C\u4E0D\u5EFA\u8BAE\u5728\u751F\u4EA7\u73AF\u5883\u4E0B\u4F7F\u7528\u3002</p><p>INFO \u7684\u7EA7\u522B\u9AD8\u4E00\u4E9B\uFF0C\u5F53\u4E00\u4E9B\u91CD\u8981\u7684\u4FE1\u606F\u9700\u8981\u6253\u5370\u7684\u65F6\u5019\uFF0C\u5C31\u7528\u8FD9\u4E2A\u3002</p><p>WARN\uFF0C\u7528\u6765\u8BB0\u5F55\u4E00\u4E9B\u8B66\u544A\u7C7B\u7684\u4FE1\u606F\uFF0C\u6BD4\u5982\u8BF4\u5BA2\u6237\u7AEF\u548C\u670D\u52A1\u7AEF\u7684\u8FDE\u63A5\u65AD\u5F00\u4E86\uFF0C\u6570\u636E\u5E93\u8FDE\u63A5\u4E22\u5931\u4E86\u3002</p><p>ERROR \u6BD4 WARN \u7684\u7EA7\u522B\u66F4\u9AD8\uFF0C\u7528\u6765\u8BB0\u5F55\u9519\u8BEF\u6216\u8005\u5F02\u5E38\u7684\u4FE1\u606F\u3002</p><p>FATAL\uFF0C\u5F53\u7A0B\u5E8F\u51FA\u73B0\u81F4\u547D\u9519\u8BEF\u7684\u65F6\u5019\u4F7F\u7528\uFF0C\u8FD9\u610F\u5473\u7740\u7A0B\u5E8F\u53EF\u80FD\u975E\u6B63\u5E38\u4E2D\u6B62\u4E86\u3002</p><p>OFF\uFF0C\u6700\u9AD8\u7EA7\u522B\uFF0C\u610F\u5473\u7740\u6240\u6709\u6D88\u606F\u90FD\u4E0D\u4F1A\u8F93\u51FA\u4E86\u3002</p><p>\u8FD9\u4E2A\u7EA7\u522B\u662F\u57FA\u4E8E Log4j \u7684\uFF0C\u548C java.util.logging \u6709\u6240\u4E0D\u540C\uFF0C\u540E\u8005\u63D0\u4F9B\u4E86\u66F4\u591A\u7684\u65E5\u5FD7\u7EA7\u522B\uFF0C\u6BD4\u5982\u8BF4 SEVERE\u3001FINER\u3001FINEST\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/log4j-4919cd20-e524-43a2-8b41-9eab6ac0c1e4.png" alt=""></p><h3 id="_03\u3001\u9519\u8BEF\u7684\u65E5\u5FD7\u8BB0\u5F55\u65B9\u5F0F\u662F\u5982\u4F55\u5F71\u54CD\u6027\u80FD\u7684" tabindex="-1"><a class="header-anchor" href="#_03\u3001\u9519\u8BEF\u7684\u65E5\u5FD7\u8BB0\u5F55\u65B9\u5F0F\u662F\u5982\u4F55\u5F71\u54CD\u6027\u80FD\u7684" aria-hidden="true">#</a> 03\u3001\u9519\u8BEF\u7684\u65E5\u5FD7\u8BB0\u5F55\u65B9\u5F0F\u662F\u5982\u4F55\u5F71\u54CD\u6027\u80FD\u7684</h3><p>\u4E3A\u4EC0\u4E48\u8BF4\u9519\u8BEF\u7684\u65E5\u5FD7\u8BB0\u5F55\u65B9\u5F0F\u4F1A\u5F71\u54CD\u7A0B\u5E8F\u7684\u6027\u80FD\u5462\uFF1F\u56E0\u4E3A\u65E5\u5FD7\u8BB0\u5F55\u7684\u6B21\u6570\u8D8A\u591A\uFF0C\u610F\u5473\u7740\u6267\u884C\u6587\u4EF6 IO \u64CD\u4F5C\u7684\u6B21\u6570\u5C31\u8D8A\u591A\uFF0C\u8FD9\u4E5F\u5C31\u610F\u5473\u7740\u4F1A\u5F71\u54CD\u5230\u7A0B\u5E8F\u7684\u6027\u80FD\uFF0C\u80FD get \u5427\uFF1F</p><p>\u867D\u7136\u8BF4\u666E\u901A\u786C\u76D8\u5347\u7EA7\u5230\u56FA\u6001\u786C\u76D8\u540E\uFF0C\u8BFB\u5199\u901F\u5EA6\u5FEB\u4E86\u5F88\u591A\uFF0C\u4F46\u78C1\u76D8\u76F8\u5BF9\u4E8E\u5185\u5B58\u548C CPU \u6765\u8BF4\uFF0C\u8FD8\u662F\u592A\u6162\u4E86\uFF01\u5C31\u50CF\u9A6C\u8F66\u548C\u5954\u9A70\u4E4B\u95F4\u7684\u901F\u5EA6\u5DEE\u8DDD\u3002</p><p>\u8FD9\u4E5F\u5C31\u662F\u4E3A\u4EC0\u4E48\u8981\u9009\u62E9\u65E5\u5FD7\u7EA7\u522B\u7684\u91CD\u8981\u6027\u3002\u5BF9\u4E8E\u7A0B\u5E8F\u6765\u8BF4\uFF0C\u8BB0\u5F55\u65E5\u5FD7\u662F\u5FC5\u9009\u9879\uFF0C\u6240\u4EE5\u80FD\u63A7\u5236\u7684\u5C31\u662F\u65E5\u5FD7\u7684\u7EA7\u522B\uFF0C\u4EE5\u53CA\u5728\u8FD9\u4E2A\u7EA7\u522B\u4E0A\u6253\u5370\u7684\u65E5\u5FD7\u3002</p><p>\u5BF9\u4E8E DEBUG \u7EA7\u522B\u7684\u65E5\u5FD7\u6765\u8BF4\uFF0C\u4E00\u5B9A\u8981\u4F7F\u7528\u4E0B\u9762\u7684\u65B9\u5F0F\u6765\u8BB0\u5F55\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">if</span><span class="token punctuation">(</span>logger<span class="token punctuation">.</span><span class="token function">isDebugEnabled</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">{</span> 
     logger<span class="token punctuation">.</span><span class="token function">debug</span><span class="token punctuation">(</span><span class="token string">&quot;DEBUG \u662F\u5F00\u542F\u7684&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span> 
 <span class="token punctuation">}</span> 
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>\u5F53 DEBUG \u7EA7\u522B\u662F\u5F00\u542F\u7684\u65F6\u5019\u518D\u6253\u5370\u65E5\u5FD7\uFF0C\u8FD9\u79CD\u65B9\u5F0F\u5728\u4F60\u770B\u5F88\u591A\u6E90\u7801\u7684\u65F6\u5019\u5C31\u53EF\u4EE5\u53D1\u73B0\uFF0C\u5F88\u5E38\u89C1\u3002</p><p>\u5207\u8BB0\uFF0C\u5728\u751F\u4EA7\u73AF\u5883\u4E0B\uFF0C\u4E00\u5B9A\u4E0D\u8981\u5F00\u542F DEBUG \u7EA7\u522B\u7684\u65E5\u5FD7\uFF0C\u5426\u5219\u7A0B\u5E8F\u5728\u5927\u91CF\u8BB0\u5F55\u65E5\u5FD7\u7684\u65F6\u5019\u4F1A\u53D8\u5F88\u6162\uFF0C\u8FD8\u6709\u53EF\u80FD\u5728\u4F60\u4E0D\u6CE8\u610F\u7684\u60C5\u51B5\u4E0B\uFF0C\u6084\u6084\u5730\u628A\u78C1\u76D8\u7A7A\u95F4\u6491\u7206\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/log4j-fd2149c5-2d0c-4c15-897d-d5fa06cce71f.png" alt=""></p><h3 id="_04\u3001\u4E3A\u4EC0\u4E48\u9009\u62E9-log4j-\u800C\u4E0D\u662F-java-util-logging" tabindex="-1"><a class="header-anchor" href="#_04\u3001\u4E3A\u4EC0\u4E48\u9009\u62E9-log4j-\u800C\u4E0D\u662F-java-util-logging" aria-hidden="true">#</a> 04\u3001\u4E3A\u4EC0\u4E48\u9009\u62E9 Log4j \u800C\u4E0D\u662F java.util.logging</h3><p>java.util.logging \u5C5E\u4E8E\u539F\u751F\u7684\u65E5\u5FD7 API\uFF0CLog4j \u5C5E\u4E8E\u7B2C\u4E09\u65B9\u7C7B\u5E93\uFF0C\u4F46\u6211\u5EFA\u8BAE\u4F7F\u7528 Log4j\uFF0C\u56E0\u4E3A Log4j \u66F4\u597D\u7528\u3002java.util.logging \u7684\u65E5\u5FD7\u7EA7\u522B\u6BD4 Log4j \u66F4\u591A\uFF0C\u4F46\u7528\u4E0D\u7740\uFF0C\u5C31\u53D8\u6210\u4E86\u591A\u4F59\u3002</p><p>Log4j \u7684\u53E6\u5916\u4E00\u4E2A\u597D\u5904\u5C31\u662F\uFF0C\u4E0D\u9700\u8981\u91CD\u65B0\u542F\u52A8 Java \u7A0B\u5E8F\u5C31\u53EF\u4EE5\u8C03\u6574\u65E5\u5FD7\u7684\u8BB0\u5F55\u7EA7\u522B\uFF0C\u975E\u5E38\u7075\u6D3B\u3002\u53EF\u4EE5\u901A\u8FC7 log4j.properties \u6587\u4EF6\u6765\u914D\u7F6E Log4j \u7684\u65E5\u5FD7\u7EA7\u522B\u3001\u8F93\u51FA\u73AF\u5883\u3001\u65E5\u5FD7\u6587\u4EF6\u7684\u8BB0\u5F55\u65B9\u5F0F\u3002</p><p>Log4j \u8FD8\u662F\u7EBF\u7A0B\u5B89\u5168\u7684\uFF0C\u53EF\u4EE5\u5728\u591A\u7EBF\u7A0B\u7684\u73AF\u5883\u4E0B\u653E\u5FC3\u4F7F\u7528\u3002</p><p>\u5148\u6765\u770B\u4E00\u4E0B java.util.logging \u7684\u4F7F\u7528\u65B9\u5F0F\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">package</span> <span class="token namespace">com<span class="token punctuation">.</span>itwanger</span><span class="token punctuation">;</span>
diff --git a/dist/assets/log4j2.html.17000ac4.js b/dist/assets/log4j2.html.066d10f7.js
similarity index 99%
rename from dist/assets/log4j2.html.17000ac4.js
rename to dist/assets/log4j2.html.066d10f7.js
index 5b239183..84cadbb9 100644
--- a/dist/assets/log4j2.html.17000ac4.js
+++ b/dist/assets/log4j2.html.066d10f7.js
@@ -1,4 +1,4 @@
-import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e}from"./app.a0271b9c.js";const t={},p=e(`<p>\u957F\u8BDD\u77ED\u8BF4\u5427\u3002</p><p>\u76F8\u4FE1\u5927\u5BB6\u5DF2\u7ECF\u88AB Log4j2 \u7684\u91CD\u5927\u6F0F\u6D1E\u5237\u5C4F\u4E86\uFF0C\u4F30\u8BA1\u6709\u4E0D\u5C11\u5C0F\u4F19\u4F34\u6B64\u65F6\u6B64\u523B\u5DF2\u7ECF\u7D2F\u8DB4\u4E0B\u4E86\u3002\u5F88\u4E0D\u5E78\uFF0C\u6211\u7684\u5C0F\u8001\u5F1F\u5C0F\u4E8C\u7684 Spring Boot \u9879\u76EE\u4E2D\u6070\u597D\u7528\u7684\u5C31\u662F Log4j2\uFF0C\u7248\u672C\u7279\u55B5\u7684\u8FD8\u662F 2.14.1\uFF0C\u5728\u8FD9\u6B21\u6F0F\u6D1E\u6CE2\u53CA\u7684\u7248\u672C\u8303\u56F4\u4E4B\u5185\u3002</p><p>\u7B2C\u4E00\u65F6\u95F4\u4ECE\u7F51\u4E0A\u5F97\u77E5\u8FD9\u4E2A\u6F0F\u6D1E\u7684\u6D88\u606F\u540E\uFF0C\u5C0F\u4E8C\u5413\u5C3F\u4E86\u3002\u8D76\u7D27\u8DD1\u8FC7\u6765\u95EE\u8001\u738B\u600E\u4E48\u89E3\u51B3\u3002</p><p>\u8001\u738B\u5148\u662F\u7ED9\u5C0F\u4E8C\u63D0\u4F9B\u4E86\u4E00\u4E9B\u4E34\u65F6\u6027\u7684\u5EFA\u8BAE\uFF0C\u6BD4\u5982\u8BF4\uFF1A</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>JVM \u53C2\u6570\u6DFB\u52A0 -Dlog4j2.formatMsgNoLookups=true
+import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e}from"./app.615e41d8.js";const t={},p=e(`<p>\u957F\u8BDD\u77ED\u8BF4\u5427\u3002</p><p>\u76F8\u4FE1\u5927\u5BB6\u5DF2\u7ECF\u88AB Log4j2 \u7684\u91CD\u5927\u6F0F\u6D1E\u5237\u5C4F\u4E86\uFF0C\u4F30\u8BA1\u6709\u4E0D\u5C11\u5C0F\u4F19\u4F34\u6B64\u65F6\u6B64\u523B\u5DF2\u7ECF\u7D2F\u8DB4\u4E0B\u4E86\u3002\u5F88\u4E0D\u5E78\uFF0C\u6211\u7684\u5C0F\u8001\u5F1F\u5C0F\u4E8C\u7684 Spring Boot \u9879\u76EE\u4E2D\u6070\u597D\u7528\u7684\u5C31\u662F Log4j2\uFF0C\u7248\u672C\u7279\u55B5\u7684\u8FD8\u662F 2.14.1\uFF0C\u5728\u8FD9\u6B21\u6F0F\u6D1E\u6CE2\u53CA\u7684\u7248\u672C\u8303\u56F4\u4E4B\u5185\u3002</p><p>\u7B2C\u4E00\u65F6\u95F4\u4ECE\u7F51\u4E0A\u5F97\u77E5\u8FD9\u4E2A\u6F0F\u6D1E\u7684\u6D88\u606F\u540E\uFF0C\u5C0F\u4E8C\u5413\u5C3F\u4E86\u3002\u8D76\u7D27\u8DD1\u8FC7\u6765\u95EE\u8001\u738B\u600E\u4E48\u89E3\u51B3\u3002</p><p>\u8001\u738B\u5148\u662F\u7ED9\u5C0F\u4E8C\u63D0\u4F9B\u4E86\u4E00\u4E9B\u4E34\u65F6\u6027\u7684\u5EFA\u8BAE\uFF0C\u6BD4\u5982\u8BF4\uFF1A</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>JVM \u53C2\u6570\u6DFB\u52A0 -Dlog4j2.formatMsgNoLookups=true
 log4j2.formatMsgNoLookups=True
 FORMAT_MESSAGES_PATTERN_DISABLE_LOOKUPS \u8BBE\u7F6E\u4E3Atrue
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>\u5E76\u4E14\u8001\u738B\u4E5F\u5728\u65F6\u523B\u7684\u5173\u6CE8\u7740 Log4j2 \u7684\u5B98\u7F51\u548C Spring Boot GitHub \u4ED3\u5E93\u7684\u6700\u65B0\u6D88\u606F\u3002</p><p>Java \u540E\u7AEF\u5F00\u53D1\u7684\u5C0F\u4F19\u4F34\u5E94\u8BE5\u90FD\u77E5\u9053\uFF0CLog4j\u3001SLF4J\u3001Logback \u8FD9 3 \u4E2A\u65E5\u5FD7\u7EC4\u4EF6\u662F\u4E00\u4E2A\u7239\u2014\u2014Ceki Gulcu\uFF0C\u4F46 Log4j 2 \u5374\u662F\u4F8B\u5916\uFF0C\u5B83\u662F Apache \u57FA\u91D1\u4F1A\u7684\u4EA7\u54C1\u3002</p><p>\u6240\u4EE5\u8FD9\u6CE2\u8D85\u7EA7\u9AD8\u5371\u6F0F\u6D1E\u7684\u9505\u5FC5\u987B\u5F97\u7531 Apache \u6765\u80CC\u3002\u5E76\u4E14\u6CE2\u53CA\u8303\u56F4\u975E\u5E38\u5E7F\uFF0C\u5DF2\u77E5\u53D7\u5F71\u54CD\u7684\u5E94\u7528\u7A0B\u5E8F\u548C\u7EC4\u4EF6\u6709\uFF1A</p><ul><li>Spring-boot-strater-log4j2</li><li>Apache Solr</li><li>Apache Flink</li><li>Apache Druid</li></ul><p>\u5E76\u4E14\u53EA\u8981\u662F\u5728 Log4j 2.x &lt;= 2.14.1 \u4E4B\u95F4\u7684\u7248\u672C\uFF0C\u90FD\u5C06\u53D7\u5230\u5F71\u54CD\u2014\u2014\u6CE8\u5B9A\u88AB\u8F7D\u5165\u53F2\u518C\u7684\u4E00\u6CE2 bug \u554A\u3002</p><p>\u76EE\u524D\uFF0CLog4j2 \u7684\u5B98\u7F51\u5DF2\u7ECF\u53D1\u5E03\u4E86 Log4j2 2.15.0 \u6B63\u5F0F\u7248\uFF0C\u6765\u89E3\u51B3\u6B64\u6B21\u6F0F\u6D1E\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/shigu/log4j2-01.png" alt=""></p><p>\u90A3\u968F\u7740 Log4j2 2.15.0 \u6B63\u5F0F\u7248\u7684\u53D1\u5E03\uFF0CSpring Boot \u7684 GitHub \u4ED3\u5E93\u63D0\u7684\u8FD9\u4E9B\u5173\u4E8E Log4j2 \u7684 issue \u90FD\u5DF2\u7ECF\u5904\u4E8E\u5173\u95ED\u72B6\u6001\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/shigu/log4j2-02.png" alt=""></p><p>\u770B\u5230\u8FD9\u4E9B\u6D88\u606F\u540E\uFF0C\u8001\u738B\u7D27\u5F20\u7684\u60C5\u7EEA\u4E00\u4E0B\u5B50\u5C31\u7F13\u89E3\u4E86\u4E0B\u6765\uFF0C\u5C31\u50CF\u5403\u4E86\u4E00\u9897\u5B9A\u5FC3\u4E38\uFF0C\u8D76\u7D27\u53BB\u901A\u77E5\u5C0F\u4E8C\u4E0D\u7528\u518D\u63D0\u5FC3\u540A\u80C6\u4E86\uFF0C\u76F4\u63A5\u4E00\u884C\u4EE3\u7801\u641E\u5B9A\u3002</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;properties&gt;
diff --git a/dist/assets/log4j2.html.f846d981.js b/dist/assets/log4j2.html.d1682823.js
similarity index 99%
rename from dist/assets/log4j2.html.f846d981.js
rename to dist/assets/log4j2.html.d1682823.js
index 711223c0..974c43d6 100644
--- a/dist/assets/log4j2.html.f846d981.js
+++ b/dist/assets/log4j2.html.d1682823.js
@@ -1,4 +1,4 @@
-import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as a,c as s,e}from"./app.a0271b9c.js";const t={},l=e(`<p>Log4j 2\uFF0C\u987E\u540D\u601D\u4E49\uFF0C\u5B83\u5C31\u662F Log4j \u7684\u5347\u7EA7\u7248\uFF0C\u5C31\u597D\u50CF\u624B\u673A\u91CC\u9762\u7684 Pro \u7248\u3002\u6211\u4F5C\u4E3A\u4E00\u4E2A\u5199\u6587\u7AE0\u65B9\u9762\u7684\u5DE5\u5177\u4EBA\uFF0C\u6216\u8005\u53EB\u6253\u5DE5\u4EBA\uFF0C\u600E\u4E48\u80FD\u4E0D\u5199\u5B8C\u8FD9\u6700\u540E\u4E00\u7BC7\u3002</p><p>Log4j\u3001SLF4J\u3001Logback \u662F\u4E00\u4E2A\u7239\u2014\u2014Ceki Gulcu\uFF0C\u4F46 Log4j 2 \u5374\u662F\u4F8B\u5916\uFF0C\u5B83\u662F Apache \u57FA\u91D1\u4F1A\u7684\u4EA7\u54C1\u3002</p><p>SLF4J \u548C Logback \u4F5C\u4E3A Log4j \u7684\u66FF\u4EE3\u54C1\uFF0C\u5728\u5F88\u591A\u65B9\u9762\u90FD\u505A\u4E86\u5FC5\u8981\u7684\u6539\u8FDB\uFF0C\u90A3\u4E3A\u4EC0\u4E48\u8FD8\u9700\u8981 Log4j 2 \u5462\uFF1F\u6211\u53EA\u80FD\u8BF4 Apache \u57FA\u91D1\u4F1A\u7684\u5F00\u53D1\u4EBA\u5458\u5F88\u95F2\uFF0C\u4E0D\uFF0C\u5F88\u62FC\uFF0C\u8981\u4E0D\u662F\u4ED6\u4EEC\u8FD9\u79CD\u7CBE\u76CA\u6C42\u7CBE\u7684\u7CBE\u795E\uFF0C\u8FD9\u4E2A\u7F16\u7A0B\u7684\u4E16\u754C\u8BE5\u6709\u591A\u67AF\u71E5\uFF0C\u6BD5\u7ADF\u5C11\u4E86\u5F88\u591A\u53EF\u4EE5\u7528\u201C\u62FF\u6765\u5C31\u7528\u201D\u7684\u8F6E\u5B50\u554A\u3002</p><p>\u4E0A\u4E00\u7BC7\u4E5F\u8BF4\u4E86\uFF0C\u8001\u677F\u4E0B\u6B7B\u547D\u4EE4\u8981\u6211\u628A\u65E5\u5FD7\u7CFB\u7EDF\u5207\u6362\u5230 Logback\uFF0C\u6211\u987A\u5229\u4EA4\u5DEE\u4E86\uFF0C\u8001\u677F\u5F88\u5F00\u5FC3\uFF0C\u5938\u6211\u8FD9\u4E2A\u6253\u5DE5\u4EBA\u5F88\u656C\u4E1A\u3002\u4E3A\u4E86\u8868\u8FBE\u5BF9\u8001\u677F\u7684\u8FD9\u4EFD\u611F\u8C22\uFF0C\u6211\u51B3\u5B9A\u5077\u5077\u6478\u6478\u5730\u8BD5\u6C34\u4E00\u4E0B Log4j 2\uFF0C\u5C3D\u7BA1\u5B83\u8FD8\u4E0D\u662F\u4E2A\u6210\u54C1\uFF0C\u53EF\u80FD\u4F1A\u4F1A\u9879\u76EE\u5E26\u6765\u4E00\u5B9A\u7684\u9690\u60A3\u3002\u4F46\u8C01\u8BA9\u54B1\u662F\u4E00\u4E2A\u656C\u5C97\u7231\u4E1A\u7684\u6253\u5DE5\u4EBA\u5462\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/log4j2-a9461265-7652-4512-9219-6b3e82392415.png" alt=""></p><h3 id="_01\u3001log4j-2-\u5F3A\u5728\u54EA" tabindex="-1"><a class="header-anchor" href="#_01\u3001log4j-2-\u5F3A\u5728\u54EA" aria-hidden="true">#</a> 01\u3001Log4j 2 \u5F3A\u5728\u54EA</h3><p>1\uFF09\u5728\u591A\u7EBF\u7A0B\u573A\u666F\u4E0B\uFF0CLog4j 2 \u7684\u541E\u5410\u91CF\u6BD4 Logback \u9AD8\u51FA\u4E86 10 \u500D\uFF0C\u5EF6\u8FDF\u964D\u4F4E\u4E86\u51E0\u4E2A\u6570\u91CF\u7EA7\u3002\u8FD9\u8BDD\u542C\u8D77\u6765\u50CF\u5439\u725B\uFF0C\u53CD\u6B63\u662F Log4j 2 \u5B98\u65B9\u81EA\u5DF1\u5439\u7684\u3002</p><p>Log4j 2 \u7684\u5F02\u6B65 Logger \u4F7F\u7528\u7684\u662F\u65E0\u9501\u6570\u636E\u7ED3\u6784\uFF0C\u800C Logback \u548C Log4j \u7684\u5F02\u6B65 Logger \u4F7F\u7528\u7684\u662F ArrayBlockingQueue\u3002\u5BF9\u4E8E\u963B\u585E\u961F\u5217\uFF0C\u591A\u7EBF\u7A0B\u5E94\u7528\u7A0B\u5E8F\u5728\u5C1D\u8BD5\u4F7F\u65E5\u5FD7\u4E8B\u4EF6\u5165\u961F\u65F6\u901A\u5E38\u4F1A\u9047\u5230\u9501\u4E89\u7528\u3002</p><p>\u4E0B\u56FE\u8BF4\u660E\u4E86\u591A\u7EBF\u7A0B\u65B9\u6848\u4E2D\u65E0\u9501\u6570\u636E\u7ED3\u6784\u5BF9\u541E\u5410\u91CF\u7684\u5F71\u54CD\u3002 Log4j 2 \u968F\u7740\u7EBF\u7A0B\u6570\u91CF\u7684\u6269\u5C55\u800C\u66F4\u597D\u5730\u6269\u5C55\uFF1A\u5177\u6709\u66F4\u591A\u7EBF\u7A0B\u7684\u5E94\u7528\u7A0B\u5E8F\u53EF\u4EE5\u8BB0\u5F55\u66F4\u591A\u7684\u65E5\u5FD7\u3002\u5176\u4ED6\u65E5\u5FD7\u8BB0\u5F55\u5E93\u7531\u4E8E\u5B58\u5728\u9501\u7ADE\u4E89\u7684\u5173\u7CFB\uFF0C\u5728\u8BB0\u5F55\u66F4\u591A\u7EBF\u7A0B\u65F6\uFF0C\u603B\u541E\u5410\u91CF\u4FDD\u6301\u6052\u5B9A\u6216\u4E0B\u964D\u3002\u8FD9\u610F\u5473\u7740\u4F7F\u7528\u5176\u4ED6\u65E5\u5FD7\u8BB0\u5F55\u5E93\uFF0C\u6BCF\u4E2A\u5355\u72EC\u7684\u7EBF\u7A0B\u5C06\u80FD\u591F\u51CF\u5C11\u65E5\u5FD7\u8BB0\u5F55\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/log4j2-43f0b03d-5c4a-4af3-9e4c-177956246740.png" alt=""></p><p>\u6027\u80FD\u65B9\u9762\u662F Log4j 2 \u7684\u6700\u5927\u4EAE\u70B9\uFF0C\u81F3\u4E8E\u5176\u4ED6\u65B9\u9762\u7684\u4E00\u4E9B\u4F18\u52BF\uFF0C\u6BD4\u5982\u8BF4\u4E0B\u9762\u8FD9\u4E9B\uFF0C\u53EF\u4EE5\u5FFD\u7565\u4E0D\u8BA1\uFF0C\u6587\u5B57\u6709\u591A\u77ED\u5C31\u4EE3\u8868\u5B83\u6709\u591A\u4E0D\u91CD\u8981\u3002</p><p>2\uFF09Log4j 2 \u53EF\u4EE5\u51CF\u5C11\u5783\u573E\u6536\u96C6\u5668\u7684\u538B\u529B\u3002</p><p>3\uFF09\u652F\u6301 Lambda \u8868\u8FBE\u5F0F\u3002</p><p>4\uFF09\u652F\u6301\u81EA\u52A8\u91CD\u8F7D\u914D\u7F6E\u3002</p><h3 id="_02\u3001log4j-2-\u4F7F\u7528\u793A\u4F8B" tabindex="-1"><a class="header-anchor" href="#_02\u3001log4j-2-\u4F7F\u7528\u793A\u4F8B" aria-hidden="true">#</a> 02\u3001Log4j 2 \u4F7F\u7528\u793A\u4F8B</h3><p>\u5E9F\u8BDD\u4E0D\u591A\u8BF4\uFF0C\u76F4\u63A5\u5B9E\u64CD\u5F00\u5E72\u3002\u7406\u8BBA\u77E5\u8BC6\u6709\u7528\uFF0C\u4F46\u4E0D\u5982\u4E0A\u624B\u5B9E\u64CD\u4E00\u628A\uFF0C\u8FD9\u4E5F\u662F\u6211\u591A\u5E74\u517B\u6210\u7684\u4E00\u4E2A\u201C\u4E0D\u90A3\u4E48\u826F\u597D\u201D\u7684\u7F16\u7A0B\u4E60\u60EF\uFF1A\u5728\u5B9E\u64CD\u4E2D\u53D1\u73B0\u95EE\u9898\uFF0C\u89E3\u51B3\u95EE\u9898\uFF0C\u5BFB\u627E\u7406\u8BBA\u57FA\u7840\u3002</p><p><strong>\u7B2C\u4E00\u6B65</strong>\uFF0C\u5728 pom.xml \u6587\u4EF6\u4E2D\u6DFB\u52A0 Log4j 2 \u7684\u4F9D\u8D56\uFF1A</p><div class="language-xml ext-xml line-numbers-mode"><pre class="language-xml"><code><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>dependency</span><span class="token punctuation">&gt;</span></span>
+import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as a,c as s,e}from"./app.615e41d8.js";const t={},l=e(`<p>Log4j 2\uFF0C\u987E\u540D\u601D\u4E49\uFF0C\u5B83\u5C31\u662F Log4j \u7684\u5347\u7EA7\u7248\uFF0C\u5C31\u597D\u50CF\u624B\u673A\u91CC\u9762\u7684 Pro \u7248\u3002\u6211\u4F5C\u4E3A\u4E00\u4E2A\u5199\u6587\u7AE0\u65B9\u9762\u7684\u5DE5\u5177\u4EBA\uFF0C\u6216\u8005\u53EB\u6253\u5DE5\u4EBA\uFF0C\u600E\u4E48\u80FD\u4E0D\u5199\u5B8C\u8FD9\u6700\u540E\u4E00\u7BC7\u3002</p><p>Log4j\u3001SLF4J\u3001Logback \u662F\u4E00\u4E2A\u7239\u2014\u2014Ceki Gulcu\uFF0C\u4F46 Log4j 2 \u5374\u662F\u4F8B\u5916\uFF0C\u5B83\u662F Apache \u57FA\u91D1\u4F1A\u7684\u4EA7\u54C1\u3002</p><p>SLF4J \u548C Logback \u4F5C\u4E3A Log4j \u7684\u66FF\u4EE3\u54C1\uFF0C\u5728\u5F88\u591A\u65B9\u9762\u90FD\u505A\u4E86\u5FC5\u8981\u7684\u6539\u8FDB\uFF0C\u90A3\u4E3A\u4EC0\u4E48\u8FD8\u9700\u8981 Log4j 2 \u5462\uFF1F\u6211\u53EA\u80FD\u8BF4 Apache \u57FA\u91D1\u4F1A\u7684\u5F00\u53D1\u4EBA\u5458\u5F88\u95F2\uFF0C\u4E0D\uFF0C\u5F88\u62FC\uFF0C\u8981\u4E0D\u662F\u4ED6\u4EEC\u8FD9\u79CD\u7CBE\u76CA\u6C42\u7CBE\u7684\u7CBE\u795E\uFF0C\u8FD9\u4E2A\u7F16\u7A0B\u7684\u4E16\u754C\u8BE5\u6709\u591A\u67AF\u71E5\uFF0C\u6BD5\u7ADF\u5C11\u4E86\u5F88\u591A\u53EF\u4EE5\u7528\u201C\u62FF\u6765\u5C31\u7528\u201D\u7684\u8F6E\u5B50\u554A\u3002</p><p>\u4E0A\u4E00\u7BC7\u4E5F\u8BF4\u4E86\uFF0C\u8001\u677F\u4E0B\u6B7B\u547D\u4EE4\u8981\u6211\u628A\u65E5\u5FD7\u7CFB\u7EDF\u5207\u6362\u5230 Logback\uFF0C\u6211\u987A\u5229\u4EA4\u5DEE\u4E86\uFF0C\u8001\u677F\u5F88\u5F00\u5FC3\uFF0C\u5938\u6211\u8FD9\u4E2A\u6253\u5DE5\u4EBA\u5F88\u656C\u4E1A\u3002\u4E3A\u4E86\u8868\u8FBE\u5BF9\u8001\u677F\u7684\u8FD9\u4EFD\u611F\u8C22\uFF0C\u6211\u51B3\u5B9A\u5077\u5077\u6478\u6478\u5730\u8BD5\u6C34\u4E00\u4E0B Log4j 2\uFF0C\u5C3D\u7BA1\u5B83\u8FD8\u4E0D\u662F\u4E2A\u6210\u54C1\uFF0C\u53EF\u80FD\u4F1A\u4F1A\u9879\u76EE\u5E26\u6765\u4E00\u5B9A\u7684\u9690\u60A3\u3002\u4F46\u8C01\u8BA9\u54B1\u662F\u4E00\u4E2A\u656C\u5C97\u7231\u4E1A\u7684\u6253\u5DE5\u4EBA\u5462\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/log4j2-a9461265-7652-4512-9219-6b3e82392415.png" alt=""></p><h3 id="_01\u3001log4j-2-\u5F3A\u5728\u54EA" tabindex="-1"><a class="header-anchor" href="#_01\u3001log4j-2-\u5F3A\u5728\u54EA" aria-hidden="true">#</a> 01\u3001Log4j 2 \u5F3A\u5728\u54EA</h3><p>1\uFF09\u5728\u591A\u7EBF\u7A0B\u573A\u666F\u4E0B\uFF0CLog4j 2 \u7684\u541E\u5410\u91CF\u6BD4 Logback \u9AD8\u51FA\u4E86 10 \u500D\uFF0C\u5EF6\u8FDF\u964D\u4F4E\u4E86\u51E0\u4E2A\u6570\u91CF\u7EA7\u3002\u8FD9\u8BDD\u542C\u8D77\u6765\u50CF\u5439\u725B\uFF0C\u53CD\u6B63\u662F Log4j 2 \u5B98\u65B9\u81EA\u5DF1\u5439\u7684\u3002</p><p>Log4j 2 \u7684\u5F02\u6B65 Logger \u4F7F\u7528\u7684\u662F\u65E0\u9501\u6570\u636E\u7ED3\u6784\uFF0C\u800C Logback \u548C Log4j \u7684\u5F02\u6B65 Logger \u4F7F\u7528\u7684\u662F ArrayBlockingQueue\u3002\u5BF9\u4E8E\u963B\u585E\u961F\u5217\uFF0C\u591A\u7EBF\u7A0B\u5E94\u7528\u7A0B\u5E8F\u5728\u5C1D\u8BD5\u4F7F\u65E5\u5FD7\u4E8B\u4EF6\u5165\u961F\u65F6\u901A\u5E38\u4F1A\u9047\u5230\u9501\u4E89\u7528\u3002</p><p>\u4E0B\u56FE\u8BF4\u660E\u4E86\u591A\u7EBF\u7A0B\u65B9\u6848\u4E2D\u65E0\u9501\u6570\u636E\u7ED3\u6784\u5BF9\u541E\u5410\u91CF\u7684\u5F71\u54CD\u3002 Log4j 2 \u968F\u7740\u7EBF\u7A0B\u6570\u91CF\u7684\u6269\u5C55\u800C\u66F4\u597D\u5730\u6269\u5C55\uFF1A\u5177\u6709\u66F4\u591A\u7EBF\u7A0B\u7684\u5E94\u7528\u7A0B\u5E8F\u53EF\u4EE5\u8BB0\u5F55\u66F4\u591A\u7684\u65E5\u5FD7\u3002\u5176\u4ED6\u65E5\u5FD7\u8BB0\u5F55\u5E93\u7531\u4E8E\u5B58\u5728\u9501\u7ADE\u4E89\u7684\u5173\u7CFB\uFF0C\u5728\u8BB0\u5F55\u66F4\u591A\u7EBF\u7A0B\u65F6\uFF0C\u603B\u541E\u5410\u91CF\u4FDD\u6301\u6052\u5B9A\u6216\u4E0B\u964D\u3002\u8FD9\u610F\u5473\u7740\u4F7F\u7528\u5176\u4ED6\u65E5\u5FD7\u8BB0\u5F55\u5E93\uFF0C\u6BCF\u4E2A\u5355\u72EC\u7684\u7EBF\u7A0B\u5C06\u80FD\u591F\u51CF\u5C11\u65E5\u5FD7\u8BB0\u5F55\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/log4j2-43f0b03d-5c4a-4af3-9e4c-177956246740.png" alt=""></p><p>\u6027\u80FD\u65B9\u9762\u662F Log4j 2 \u7684\u6700\u5927\u4EAE\u70B9\uFF0C\u81F3\u4E8E\u5176\u4ED6\u65B9\u9762\u7684\u4E00\u4E9B\u4F18\u52BF\uFF0C\u6BD4\u5982\u8BF4\u4E0B\u9762\u8FD9\u4E9B\uFF0C\u53EF\u4EE5\u5FFD\u7565\u4E0D\u8BA1\uFF0C\u6587\u5B57\u6709\u591A\u77ED\u5C31\u4EE3\u8868\u5B83\u6709\u591A\u4E0D\u91CD\u8981\u3002</p><p>2\uFF09Log4j 2 \u53EF\u4EE5\u51CF\u5C11\u5783\u573E\u6536\u96C6\u5668\u7684\u538B\u529B\u3002</p><p>3\uFF09\u652F\u6301 Lambda \u8868\u8FBE\u5F0F\u3002</p><p>4\uFF09\u652F\u6301\u81EA\u52A8\u91CD\u8F7D\u914D\u7F6E\u3002</p><h3 id="_02\u3001log4j-2-\u4F7F\u7528\u793A\u4F8B" tabindex="-1"><a class="header-anchor" href="#_02\u3001log4j-2-\u4F7F\u7528\u793A\u4F8B" aria-hidden="true">#</a> 02\u3001Log4j 2 \u4F7F\u7528\u793A\u4F8B</h3><p>\u5E9F\u8BDD\u4E0D\u591A\u8BF4\uFF0C\u76F4\u63A5\u5B9E\u64CD\u5F00\u5E72\u3002\u7406\u8BBA\u77E5\u8BC6\u6709\u7528\uFF0C\u4F46\u4E0D\u5982\u4E0A\u624B\u5B9E\u64CD\u4E00\u628A\uFF0C\u8FD9\u4E5F\u662F\u6211\u591A\u5E74\u517B\u6210\u7684\u4E00\u4E2A\u201C\u4E0D\u90A3\u4E48\u826F\u597D\u201D\u7684\u7F16\u7A0B\u4E60\u60EF\uFF1A\u5728\u5B9E\u64CD\u4E2D\u53D1\u73B0\u95EE\u9898\uFF0C\u89E3\u51B3\u95EE\u9898\uFF0C\u5BFB\u627E\u7406\u8BBA\u57FA\u7840\u3002</p><p><strong>\u7B2C\u4E00\u6B65</strong>\uFF0C\u5728 pom.xml \u6587\u4EF6\u4E2D\u6DFB\u52A0 Log4j 2 \u7684\u4F9D\u8D56\uFF1A</p><div class="language-xml ext-xml line-numbers-mode"><pre class="language-xml"><code><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>dependency</span><span class="token punctuation">&gt;</span></span>
     <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>groupId</span><span class="token punctuation">&gt;</span></span>org.apache.logging.log4j<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>groupId</span><span class="token punctuation">&gt;</span></span>
     <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>artifactId</span><span class="token punctuation">&gt;</span></span>log4j-api<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>artifactId</span><span class="token punctuation">&gt;</span></span>
     <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>version</span><span class="token punctuation">&gt;</span></span>2.5<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>version</span><span class="token punctuation">&gt;</span></span>
diff --git a/dist/assets/logback.html.65200f68.js b/dist/assets/logback.html.28ab1df5.js
similarity index 79%
rename from dist/assets/logback.html.65200f68.js
rename to dist/assets/logback.html.28ab1df5.js
index a50daf29..7e3c0ad5 100644
--- a/dist/assets/logback.html.65200f68.js
+++ b/dist/assets/logback.html.28ab1df5.js
@@ -1 +1 @@
-const t={key:"v-c65767f6",path:"/springboot/logback.html",title:"Spring Boot \u6574\u5408 Logback \u5B9A\u5236\u65E5\u5FD7\u6846\u67B6",lang:"zh-CN",frontmatter:{category:["Java\u4F01\u4E1A\u7EA7\u5F00\u53D1"],tag:["Spring Boot","Redis"],title:"Spring Boot \u6574\u5408 Logback \u5B9A\u5236\u65E5\u5FD7\u6846\u67B6",summary:"\u5173\u4E8E Logback \u65E5\u5FD7\u7CFB\u7EDF\u662F\u4E00\u4E2A\u7EBF\u4E0A\u9879\u76EE\u5FC5\u5907\u7684\u7D20\u8D28\u4E4B\u4E00\uFF0C\u4EE3\u8868\u6027\u7684\u65E5\u5FD7\u6846\u67B6 Log4j\u3001SLF4J\u3001Logback \u8FD9\u54E5\u4EE8\u7ADF\u7136\u662F\u4EB2\u5144\u5F1F\uFF0C\u4ED6\u4EEC\u6709\u4E00\u4E2A\u4EB2\u7239\uFF0C\u90A3\u5C31\u662F\u5DE8\u4F6C Ceki Gulcu\u3002 \u7531\u4E8E Spring Boot \u7684\u9ED8\u8BA4\u65E5\u5FD7\u6846\u67B6\u9009\u7528\u7684 Logback\uFF0C\u518D\u52A0\u4E0A Log4j2 \u4E4B\u524D\u7206\u8FC7\u4E25\u91CD\u7684\u6F0F\u6D1E\uFF0C\u6240\u4EE5\u6211\u4EEC\u8FD9\u6B21\u5C31\u53EA\u5173\u6CE8 Logback\u3002 1\uFF09Logback ",head:[["meta",{property:"og:url",content:"https://tobebetterjavaer.com/springboot/logback.html"}],["meta",{property:"og:site_name",content:"Java \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF"}],["meta",{property:"og:title",content:"Spring Boot \u6574\u5408 Logback \u5B9A\u5236\u65E5\u5FD7\u6846\u67B6"}],["meta",{property:"og:type",content:"article"}],["meta",{property:"og:updated_time",content:"2022-05-21T16:06:08.000Z"}],["meta",{property:"og:locale",content:"zh-CN"}],["meta",{property:"article:tag",content:"Spring Boot"}],["meta",{property:"article:tag",content:"Redis"}],["meta",{property:"article:modified_time",content:"2022-05-21T16:06:08.000Z"}]]},excerpt:"",headers:[{level:3,title:"\u5173\u4E8E Logback",slug:"\u5173\u4E8E-logback",children:[]},{level:3,title:"\u76F4\u63A5\u4E0A\u624B",slug:"\u76F4\u63A5\u4E0A\u624B",children:[]},{level:3,title:"\u7F16\u7A0B\u55B5\u5B9E\u6218\u9879\u76EE\u7684\u65E5\u5FD7\u6848\u4F8B\u5206\u6790",slug:"\u7F16\u7A0B\u55B5\u5B9E\u6218\u9879\u76EE\u7684\u65E5\u5FD7\u6848\u4F8B\u5206\u6790",children:[]},{level:3,title:"\u4F7F\u7528 lombok \u8FDB\u884C\u65E5\u5FD7\u8BB0\u5F55",slug:"\u4F7F\u7528-lombok-\u8FDB\u884C\u65E5\u5FD7\u8BB0\u5F55",children:[]},{level:3,title:"\u6E90\u7801\u8DEF\u5F84",slug:"\u6E90\u7801\u8DEF\u5F84",children:[]}],git:{createdTime:1653092056e3,updatedTime:1653149168e3,contributors:[{name:"itwanger",email:"www.qing_gee@163.com",commits:2}]},readingTime:{minutes:8.01,words:2403},filePathRelative:"springboot/logback.md"};export{t as data};
+const t={key:"v-c65767f6",path:"/springboot/logback.html",title:"Spring Boot \u6574\u5408 Logback \u5B9A\u5236\u65E5\u5FD7\u6846\u67B6",lang:"zh-CN",frontmatter:{category:["Java\u4F01\u4E1A\u7EA7\u5F00\u53D1"],tag:["Spring Boot","Redis"],title:"Spring Boot \u6574\u5408 Logback \u5B9A\u5236\u65E5\u5FD7\u6846\u67B6",summary:"\u5173\u4E8E Logback \u65E5\u5FD7\u7CFB\u7EDF\u662F\u4E00\u4E2A\u7EBF\u4E0A\u9879\u76EE\u5FC5\u5907\u7684\u7D20\u8D28\u4E4B\u4E00\uFF0C\u4EE3\u8868\u6027\u7684\u65E5\u5FD7\u6846\u67B6 Log4j\u3001SLF4J\u3001Logback \u8FD9\u54E5\u4EE8\u7ADF\u7136\u662F\u4EB2\u5144\u5F1F\uFF0C\u4ED6\u4EEC\u6709\u4E00\u4E2A\u4EB2\u7239\uFF0C\u90A3\u5C31\u662F\u5DE8\u4F6C Ceki Gulcu\u3002 \u7531\u4E8E Spring Boot \u7684\u9ED8\u8BA4\u65E5\u5FD7\u6846\u67B6\u9009\u7528\u7684 Logback\uFF0C\u518D\u52A0\u4E0A Log4j2 \u4E4B\u524D\u7206\u8FC7\u4E25\u91CD\u7684\u6F0F\u6D1E\uFF0C\u6240\u4EE5\u6211\u4EEC\u8FD9\u6B21\u5C31\u53EA\u5173\u6CE8 Logback\u3002 1\uFF09Logback ",head:[["meta",{property:"og:url",content:"https://tobebetterjavaer.com/springboot/logback.html"}],["meta",{property:"og:site_name",content:"Java \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF"}],["meta",{property:"og:title",content:"Spring Boot \u6574\u5408 Logback \u5B9A\u5236\u65E5\u5FD7\u6846\u67B6"}],["meta",{property:"og:type",content:"article"}],["meta",{property:"og:updated_time",content:"2022-06-10T11:28:25.000Z"}],["meta",{property:"og:locale",content:"zh-CN"}],["meta",{property:"article:tag",content:"Spring Boot"}],["meta",{property:"article:tag",content:"Redis"}],["meta",{property:"article:modified_time",content:"2022-06-10T11:28:25.000Z"}]]},excerpt:"",headers:[{level:2,title:"\u5173\u4E8E Logback",slug:"\u5173\u4E8E-logback",children:[]},{level:2,title:"\u76F4\u63A5\u4E0A\u624B",slug:"\u76F4\u63A5\u4E0A\u624B",children:[]},{level:2,title:"\u7F16\u7A0B\u55B5\u5B9E\u6218\u9879\u76EE\u7684\u65E5\u5FD7\u6848\u4F8B\u5206\u6790",slug:"\u7F16\u7A0B\u55B5\u5B9E\u6218\u9879\u76EE\u7684\u65E5\u5FD7\u6848\u4F8B\u5206\u6790",children:[]},{level:2,title:"\u4F7F\u7528 lombok \u8FDB\u884C\u65E5\u5FD7\u8BB0\u5F55",slug:"\u4F7F\u7528-lombok-\u8FDB\u884C\u65E5\u5FD7\u8BB0\u5F55",children:[]},{level:2,title:"\u6E90\u7801\u8DEF\u5F84",slug:"\u6E90\u7801\u8DEF\u5F84",children:[]}],git:{createdTime:1653092056e3,updatedTime:1654860505e3,contributors:[{name:"itwanger",email:"www.qing_gee@163.com",commits:3}]},readingTime:{minutes:8.01,words:2404},filePathRelative:"springboot/logback.md"};export{t as data};
diff --git a/dist/assets/logback.html.869073f6.js b/dist/assets/logback.html.806b8b11.js
similarity index 99%
rename from dist/assets/logback.html.869073f6.js
rename to dist/assets/logback.html.806b8b11.js
index 12ec90e0..1d2f90ca 100644
--- a/dist/assets/logback.html.869073f6.js
+++ b/dist/assets/logback.html.806b8b11.js
@@ -1,4 +1,4 @@
-import{_ as l}from"./plugin-vue_export-helper.21dcd24c.js";import{r as o,o as i,c,a as n,b as s,d as e,e as t}from"./app.a0271b9c.js";const p={},r=n("p",null,"\u5C31\u5728\u6628\u5929\uFF0C\u8001\u677F\u542C\u6211\u8BF4\u5B8C Logback \u6709\u591A\u725B\u903C\u4E4B\u540E\uFF0C\u5F7B\u5E95\u52A8\u5FC3\u4E86\uFF0C\u5BF9\u6211\u4E0B\u4E86\u6B7B\u547D\u4EE4\uFF0C\u201C\u8FD9\u4E48\u597D\u7684\u65E5\u5FD7\u7CFB\u7EDF\uFF0C\u4F60\u8FD8\u4E0D\u8D76\u7D27\u70B9\uFF0C\u628A\u5B83\u5207\u6362\u5230\u54B1\u7684\u9879\u76EE\u5F53\u4E2D\uFF01\u201D",-1),d=n("p",null,"\u6211\u4EEC\u9879\u76EE\u4E4B\u524D\u7528\u7684 Log4j\uFF0C\u5728\u6211\u770B\u6765\uFF0C\u5DF2\u7ECF\u8DB3\u591F\u7528\u4E86\uFF0C\u6BD5\u7ADF\u662F\u5C0F\u516C\u53F8\uFF0C\u6027\u80FD\u4E0A\u7684\u8981\u6C42\u6CA1\u90A3\u4E48\u82DB\u523B\u3002",-1),u=n("p",null,[n("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/logback-320329e9-a754-427f-8a19-2e4f809b6a6f.png",alt:""})],-1),g={href:"https://mp.weixin.qq.com/s/AXgNnJe8djD901EmhFkWUg",target:"_blank",rel:"noopener noreferrer"},v=e("Log4j"),m=e(" \u4ECB\u7ECD\u8FC7\u4E86\uFF0C"),b={href:"https://mp.weixin.qq.com/s/EhKf1rHWL-QII0f6eo0uVA",target:"_blank",rel:"noopener noreferrer"},k=e("SLF4J"),h=e(" \u4E5F\u4ECB\u7ECD\u8FC7\u4E86\uFF0C\u90A3\u63A5\u4E0B\u6765\uFF0C\u4F60\u61C2\u7684\uFF0CLogback \u5C31\u8981\u9686\u91CD\u5730\u767B\u573A\u4E86\uFF0C\u6BD5\u7ADF\u5B83\u54E5\u4EE8\u6709\u4E00\u4E2A\u7239\uFF0C\u90A3\u5C31\u662F\u5DE8\u4F6C Ceki Gulcu\u3002"),f=n("h3",{id:"_01\u3001logback-\u5F3A\u5728\u54EA",tabindex:"-1"},[n("a",{class:"header-anchor",href:"#_01\u3001logback-\u5F3A\u5728\u54EA","aria-hidden":"true"},"#"),e(" 01\u3001Logback \u5F3A\u5728\u54EA")],-1),q=n("p",null,"1\uFF09\u975E\u5E38\u81EA\u7136\u5730\u5B9E\u73B0\u4E86 SLF4J\uFF0C\u4E0D\u9700\u8981\u50CF Log4j \u548C JUL \u90A3\u6837\u52A0\u4E00\u4E2A\u9002\u914D\u5C42\u3002",-1),y=n("p",null,[n("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/logback-6ba1b465-5533-49dd-b875-48a10ba29f8e.png",alt:""})],-1),x=n("p",null,"2\uFF09Spring Boot \u7684\u9ED8\u8BA4\u65E5\u5FD7\u6846\u67B6\u4F7F\u7528\u7684\u662F Logback\u3002\u4E00\u65E6\u67D0\u6B3E\u5DE5\u5177\u5E93\u6210\u4E3A\u4E86\u9ED8\u8BA4\u9009\u9879\uFF0C\u90A3\u5C31\u8BF4\u660E\u8FD9\u6B3E\u5DE5\u5177\u5DF2\u7ECF\u8D85\u8FC7\u4E86\u5176\u4ED6\u7ADE\u54C1\u3002",-1),_=n("p",null,[n("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/logback-2696cd8b-7e8c-4476-9a06-272fd22fa4b6.png",alt:""})],-1),j=e("\u6CE8\u610F\u770B\u4E0B\u56FE\uFF08\u8BC1\u636E\u627E\u5230\u4E86\uFF0C\u6765\u81EA "),L={href:"https://docs.spring.io/spring-boot/docs/current/reference/html/spring-boot-features.html#boot-features-logging",target:"_blank",rel:"noopener noreferrer"},F=e("Spring Boot \u5B98\u7F51"),T=e("\uFF09\uFF1A"),R=t(`<p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/logback-82d78a15-8ae0-4377-a7af-aebd5cda4fda.png" alt=""></p><p>\u4E5F\u53EF\u4EE5\u901A\u8FC7\u6E90\u7801\u7684\u5F62\u5F0F\u770B\u5F97\u5230\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/logback-2df2d06e-1b01-428b-8444-d765056e25bb.png" alt=""></p><p>3\uFF09\u652F\u6301\u81EA\u52A8\u91CD\u65B0\u52A0\u8F7D\u914D\u7F6E\u6587\u4EF6\uFF0C\u4E0D\u9700\u8981\u53E6\u5916\u521B\u5EFA\u626B\u63CF\u7EBF\u7A0B\u6765\u76D1\u89C6\u3002</p><p>4\uFF09\u65E2\u7136\u662F\u5DE8\u4F6C\u7684\u65B0\u4F5C\uFF0C\u90A3\u5FC5\u7136\u5728\u6027\u80FD\u4E0A\u6709\u4E86\u5F88\u5927\u7684\u63D0\u5347\uFF0C\u4E0D\u7136\u5462\uFF1F</p><h3 id="_02\u3001logback-\u4F7F\u7528\u793A\u4F8B" tabindex="-1"><a class="header-anchor" href="#_02\u3001logback-\u4F7F\u7528\u793A\u4F8B" aria-hidden="true">#</a> 02\u3001Logback \u4F7F\u7528\u793A\u4F8B</h3><p><strong>\u7B2C\u4E00\u6B65</strong>\uFF0C\u5728 pom.xml \u6587\u4EF6\u4E2D\u6DFB\u52A0 Logback \u7684\u4F9D\u8D56\uFF1A</p><div class="language-xml ext-xml line-numbers-mode"><pre class="language-xml"><code><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>dependency</span><span class="token punctuation">&gt;</span></span>
+import{_ as l}from"./plugin-vue_export-helper.21dcd24c.js";import{r as o,o as i,c,a as n,b as s,d as e,e as t}from"./app.615e41d8.js";const p={},r=n("p",null,"\u5C31\u5728\u6628\u5929\uFF0C\u8001\u677F\u542C\u6211\u8BF4\u5B8C Logback \u6709\u591A\u725B\u903C\u4E4B\u540E\uFF0C\u5F7B\u5E95\u52A8\u5FC3\u4E86\uFF0C\u5BF9\u6211\u4E0B\u4E86\u6B7B\u547D\u4EE4\uFF0C\u201C\u8FD9\u4E48\u597D\u7684\u65E5\u5FD7\u7CFB\u7EDF\uFF0C\u4F60\u8FD8\u4E0D\u8D76\u7D27\u70B9\uFF0C\u628A\u5B83\u5207\u6362\u5230\u54B1\u7684\u9879\u76EE\u5F53\u4E2D\uFF01\u201D",-1),d=n("p",null,"\u6211\u4EEC\u9879\u76EE\u4E4B\u524D\u7528\u7684 Log4j\uFF0C\u5728\u6211\u770B\u6765\uFF0C\u5DF2\u7ECF\u8DB3\u591F\u7528\u4E86\uFF0C\u6BD5\u7ADF\u662F\u5C0F\u516C\u53F8\uFF0C\u6027\u80FD\u4E0A\u7684\u8981\u6C42\u6CA1\u90A3\u4E48\u82DB\u523B\u3002",-1),u=n("p",null,[n("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/logback-320329e9-a754-427f-8a19-2e4f809b6a6f.png",alt:""})],-1),g={href:"https://mp.weixin.qq.com/s/AXgNnJe8djD901EmhFkWUg",target:"_blank",rel:"noopener noreferrer"},v=e("Log4j"),m=e(" \u4ECB\u7ECD\u8FC7\u4E86\uFF0C"),b={href:"https://mp.weixin.qq.com/s/EhKf1rHWL-QII0f6eo0uVA",target:"_blank",rel:"noopener noreferrer"},k=e("SLF4J"),h=e(" \u4E5F\u4ECB\u7ECD\u8FC7\u4E86\uFF0C\u90A3\u63A5\u4E0B\u6765\uFF0C\u4F60\u61C2\u7684\uFF0CLogback \u5C31\u8981\u9686\u91CD\u5730\u767B\u573A\u4E86\uFF0C\u6BD5\u7ADF\u5B83\u54E5\u4EE8\u6709\u4E00\u4E2A\u7239\uFF0C\u90A3\u5C31\u662F\u5DE8\u4F6C Ceki Gulcu\u3002"),f=n("h3",{id:"_01\u3001logback-\u5F3A\u5728\u54EA",tabindex:"-1"},[n("a",{class:"header-anchor",href:"#_01\u3001logback-\u5F3A\u5728\u54EA","aria-hidden":"true"},"#"),e(" 01\u3001Logback \u5F3A\u5728\u54EA")],-1),q=n("p",null,"1\uFF09\u975E\u5E38\u81EA\u7136\u5730\u5B9E\u73B0\u4E86 SLF4J\uFF0C\u4E0D\u9700\u8981\u50CF Log4j \u548C JUL \u90A3\u6837\u52A0\u4E00\u4E2A\u9002\u914D\u5C42\u3002",-1),y=n("p",null,[n("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/logback-6ba1b465-5533-49dd-b875-48a10ba29f8e.png",alt:""})],-1),x=n("p",null,"2\uFF09Spring Boot \u7684\u9ED8\u8BA4\u65E5\u5FD7\u6846\u67B6\u4F7F\u7528\u7684\u662F Logback\u3002\u4E00\u65E6\u67D0\u6B3E\u5DE5\u5177\u5E93\u6210\u4E3A\u4E86\u9ED8\u8BA4\u9009\u9879\uFF0C\u90A3\u5C31\u8BF4\u660E\u8FD9\u6B3E\u5DE5\u5177\u5DF2\u7ECF\u8D85\u8FC7\u4E86\u5176\u4ED6\u7ADE\u54C1\u3002",-1),_=n("p",null,[n("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/logback-2696cd8b-7e8c-4476-9a06-272fd22fa4b6.png",alt:""})],-1),j=e("\u6CE8\u610F\u770B\u4E0B\u56FE\uFF08\u8BC1\u636E\u627E\u5230\u4E86\uFF0C\u6765\u81EA "),L={href:"https://docs.spring.io/spring-boot/docs/current/reference/html/spring-boot-features.html#boot-features-logging",target:"_blank",rel:"noopener noreferrer"},F=e("Spring Boot \u5B98\u7F51"),T=e("\uFF09\uFF1A"),R=t(`<p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/logback-82d78a15-8ae0-4377-a7af-aebd5cda4fda.png" alt=""></p><p>\u4E5F\u53EF\u4EE5\u901A\u8FC7\u6E90\u7801\u7684\u5F62\u5F0F\u770B\u5F97\u5230\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/logback-2df2d06e-1b01-428b-8444-d765056e25bb.png" alt=""></p><p>3\uFF09\u652F\u6301\u81EA\u52A8\u91CD\u65B0\u52A0\u8F7D\u914D\u7F6E\u6587\u4EF6\uFF0C\u4E0D\u9700\u8981\u53E6\u5916\u521B\u5EFA\u626B\u63CF\u7EBF\u7A0B\u6765\u76D1\u89C6\u3002</p><p>4\uFF09\u65E2\u7136\u662F\u5DE8\u4F6C\u7684\u65B0\u4F5C\uFF0C\u90A3\u5FC5\u7136\u5728\u6027\u80FD\u4E0A\u6709\u4E86\u5F88\u5927\u7684\u63D0\u5347\uFF0C\u4E0D\u7136\u5462\uFF1F</p><h3 id="_02\u3001logback-\u4F7F\u7528\u793A\u4F8B" tabindex="-1"><a class="header-anchor" href="#_02\u3001logback-\u4F7F\u7528\u793A\u4F8B" aria-hidden="true">#</a> 02\u3001Logback \u4F7F\u7528\u793A\u4F8B</h3><p><strong>\u7B2C\u4E00\u6B65</strong>\uFF0C\u5728 pom.xml \u6587\u4EF6\u4E2D\u6DFB\u52A0 Logback \u7684\u4F9D\u8D56\uFF1A</p><div class="language-xml ext-xml line-numbers-mode"><pre class="language-xml"><code><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>dependency</span><span class="token punctuation">&gt;</span></span>
     <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>groupId</span><span class="token punctuation">&gt;</span></span>ch.qos.logback<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>groupId</span><span class="token punctuation">&gt;</span></span>
     <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>artifactId</span><span class="token punctuation">&gt;</span></span>logback-classic<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>artifactId</span><span class="token punctuation">&gt;</span></span>
     <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>version</span><span class="token punctuation">&gt;</span></span>1.2.3<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>version</span><span class="token punctuation">&gt;</span></span>
diff --git a/dist/assets/logback.html.bd3bc959.js b/dist/assets/logback.html.ce19f5e4.js
similarity index 79%
rename from dist/assets/logback.html.bd3bc959.js
rename to dist/assets/logback.html.ce19f5e4.js
index 72e5f711..ef05610b 100644
--- a/dist/assets/logback.html.bd3bc959.js
+++ b/dist/assets/logback.html.ce19f5e4.js
@@ -1,4 +1,4 @@
-import{_ as o}from"./plugin-vue_export-helper.21dcd24c.js";import{r as t,o as c,c as r,a as n,b as a,w as d,e as i,d as e}from"./app.a0271b9c.js";const g={},p=i(`<h3 id="\u5173\u4E8E-logback" tabindex="-1"><a class="header-anchor" href="#\u5173\u4E8E-logback" aria-hidden="true">#</a> \u5173\u4E8E Logback</h3><p>\u65E5\u5FD7\u7CFB\u7EDF\u662F\u4E00\u4E2A\u7EBF\u4E0A\u9879\u76EE\u5FC5\u5907\u7684\u7D20\u8D28\u4E4B\u4E00\uFF0C\u4EE3\u8868\u6027\u7684\u65E5\u5FD7\u6846\u67B6 Log4j\u3001SLF4J\u3001Logback \u8FD9\u54E5\u4EE8\u7ADF\u7136\u662F\u4EB2\u5144\u5F1F\uFF0C\u4ED6\u4EEC\u6709\u4E00\u4E2A\u4EB2\u7239\uFF0C\u90A3\u5C31\u662F\u5DE8\u4F6C Ceki Gulcu\u3002</p><p>\u7531\u4E8E Spring Boot \u7684\u9ED8\u8BA4\u65E5\u5FD7\u6846\u67B6\u9009\u7528\u7684 Logback\uFF0C\u518D\u52A0\u4E0A Log4j2 \u4E4B\u524D\u7206\u8FC7\u4E25\u91CD\u7684\u6F0F\u6D1E\uFF0C\u6240\u4EE5\u6211\u4EEC\u8FD9\u6B21\u5C31\u53EA\u5173\u6CE8 Logback\u3002</p><p>1\uFF09Logback \u975E\u5E38\u81EA\u7136\u5730\u5B9E\u73B0\u4E86 SLF4J\uFF0C\u4E0D\u9700\u8981\u50CF Log4j \u548C JUL \u90A3\u6837\u52A0\u4E00\u4E2A\u9002\u914D\u5C42\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/logback-67c983bf-101d-48cc-80da-3cb031d7407b.png" alt=""></p><p>2\uFF09Spring Boot \u7684\u9ED8\u8BA4\u65E5\u5FD7\u6846\u67B6\u4F7F\u7528\u7684\u662F Logback\uFF0C\u542F\u52A8\u7F16\u7A0B\u55B5\u9879\u76EE\u7684\u65F6\u5019\u5C31\u53EF\u4EE5\u770B\u5230 Logback \u8BB0\u5F55\u7684\u65E5\u5FD7\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/logback-a2cacfa1-484a-4904-bea3-248d12097387.png" alt=""></p><p>\u600E\u4E48\u770B\u51FA\u6765\u662F logback \u5462\uFF1F</p><p>\u8BF4\u5B9E\u8BDD\uFF0C\u770B\u4E0D\u51FA\u6765\uFF0C\u54C8\u54C8\u54C8\uFF0C\u4E0D\u8FC7\u53EF\u4EE5\u4ECE Spring Boot \u5B98\u7F51\u627E\u5230\u8BC1\u636E\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/logback-9ac58c2c-e7f9-4df7-aede-ba7d5c69741c.png" alt=""></p><p>\u8FD8\u6709\uFF0C\u901A\u8FC7\u6E90\u7801\u4E5F\u53EF\u4EE5\u7AA5\u89C1\u4E00\u4E8C\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/logback-7a10bd7b-598a-4c30-9c83-b80689671f41.png" alt=""></p><p>3\uFF09logback \u5206\u4E3A\u4E09\u4E2A\u6A21\u5757\uFF1A</p><ul><li>logback-core\uFF0C\u6838\u5FC3\u6A21\u5757\uFF0C\u63D0\u4F9B\u4E86\u5173\u952E\u7684\u901A\u7528\u673A\u5236\uFF1B</li><li>logback-classic\uFF0C\u53EF\u4EE5\u770B\u4F5C\u662F log4j \u7684\u6539\u8FDB\u7248\uFF0C\u5B9E\u73B0\u4E86\u7B80\u5355\u7684\u65E5\u5FD7\u95E8\u9762 SLF4J\uFF1B</li><li>logback-access\uFF0C\u4E3B\u8981\u7528\u6765\u548C Servlet \u5BB9\u5668\u4EA4\u4E92\uFF0C\u6BD4\u5982\u8BF4 Tomcat\uFF0C\u63D0\u4F9B\u4E86\u4E00\u4E9B HTTP \u8BBF\u95EE\u7684\u529F\u80FD\u3002</li></ul><p>\u5982\u679C\u60F3\u7814\u7A76 logback \u6E90\u7801\u7684\u8BDD\uFF0C\u53EF\u4EE5\u6309\u7167\u8FD9\u4E09\u4E2A\u6A21\u5757\u53BB\u7814\u7A76\u3002</p><h3 id="\u76F4\u63A5\u4E0A\u624B" tabindex="-1"><a class="header-anchor" href="#\u76F4\u63A5\u4E0A\u624B" aria-hidden="true">#</a> \u76F4\u63A5\u4E0A\u624B</h3><p>\u4E0D\u5E9F\u8BDD\uFF0C\u76F4\u63A5\u65B0\u5EFA\u4E00\u4E2A\u7A7A\u7684 Spring Boot \u9879\u76EE\uFF0C\u5728\u6D4B\u8BD5\u7C7B\u4E2D\u52A0\u4E0A\u4E24\u884C\u4EE3\u7801\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token annotation punctuation">@SpringBootTest</span>
+import{_ as i}from"./plugin-vue_export-helper.21dcd24c.js";import{r as l,o,c,a as n,b as s,e as t,d as e}from"./app.615e41d8.js";const r={},d=t(`<h2 id="\u5173\u4E8E-logback" tabindex="-1"><a class="header-anchor" href="#\u5173\u4E8E-logback" aria-hidden="true">#</a> \u5173\u4E8E Logback</h2><p>\u65E5\u5FD7\u7CFB\u7EDF\u662F\u4E00\u4E2A\u7EBF\u4E0A\u9879\u76EE\u5FC5\u5907\u7684\u7D20\u8D28\u4E4B\u4E00\uFF0C\u4EE3\u8868\u6027\u7684\u65E5\u5FD7\u6846\u67B6 Log4j\u3001SLF4J\u3001Logback \u8FD9\u54E5\u4EE8\u7ADF\u7136\u662F\u4EB2\u5144\u5F1F\uFF0C\u4ED6\u4EEC\u6709\u4E00\u4E2A\u4EB2\u7239\uFF0C\u90A3\u5C31\u662F\u5DE8\u4F6C Ceki Gulcu\u3002</p><p>\u7531\u4E8E Spring Boot \u7684\u9ED8\u8BA4\u65E5\u5FD7\u6846\u67B6\u9009\u7528\u7684 Logback\uFF0C\u518D\u52A0\u4E0A Log4j2 \u4E4B\u524D\u7206\u8FC7\u4E25\u91CD\u7684\u6F0F\u6D1E\uFF0C\u6240\u4EE5\u6211\u4EEC\u8FD9\u6B21\u5C31\u53EA\u5173\u6CE8 Logback\u3002</p><p>1\uFF09Logback \u975E\u5E38\u81EA\u7136\u5730\u5B9E\u73B0\u4E86 SLF4J\uFF0C\u4E0D\u9700\u8981\u50CF Log4j \u548C JUL \u90A3\u6837\u52A0\u4E00\u4E2A\u9002\u914D\u5C42\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/logback-67c983bf-101d-48cc-80da-3cb031d7407b.png" alt=""></p><p>2\uFF09Spring Boot \u7684\u9ED8\u8BA4\u65E5\u5FD7\u6846\u67B6\u4F7F\u7528\u7684\u662F Logback\uFF0C\u542F\u52A8\u7F16\u7A0B\u55B5\u9879\u76EE\u7684\u65F6\u5019\u5C31\u53EF\u4EE5\u770B\u5230 Logback \u8BB0\u5F55\u7684\u65E5\u5FD7\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/logback-a2cacfa1-484a-4904-bea3-248d12097387.png" alt=""></p><p>\u600E\u4E48\u770B\u51FA\u6765\u662F logback \u5462\uFF1F</p><p>\u8BF4\u5B9E\u8BDD\uFF0C\u770B\u4E0D\u51FA\u6765\uFF0C\u54C8\u54C8\u54C8\uFF0C\u4E0D\u8FC7\u53EF\u4EE5\u4ECE Spring Boot \u5B98\u7F51\u627E\u5230\u8BC1\u636E\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/logback-9ac58c2c-e7f9-4df7-aede-ba7d5c69741c.png" alt=""></p><p>\u8FD8\u6709\uFF0C\u901A\u8FC7\u6E90\u7801\u4E5F\u53EF\u4EE5\u7AA5\u89C1\u4E00\u4E8C\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/logback-7a10bd7b-598a-4c30-9c83-b80689671f41.png" alt=""></p><p>3\uFF09logback \u5206\u4E3A\u4E09\u4E2A\u6A21\u5757\uFF1A</p><ul><li>logback-core\uFF0C\u6838\u5FC3\u6A21\u5757\uFF0C\u63D0\u4F9B\u4E86\u5173\u952E\u7684\u901A\u7528\u673A\u5236\uFF1B</li><li>logback-classic\uFF0C\u53EF\u4EE5\u770B\u4F5C\u662F log4j \u7684\u6539\u8FDB\u7248\uFF0C\u5B9E\u73B0\u4E86\u7B80\u5355\u7684\u65E5\u5FD7\u95E8\u9762 SLF4J\uFF1B</li><li>logback-access\uFF0C\u4E3B\u8981\u7528\u6765\u548C Servlet \u5BB9\u5668\u4EA4\u4E92\uFF0C\u6BD4\u5982\u8BF4 Tomcat\uFF0C\u63D0\u4F9B\u4E86\u4E00\u4E9B HTTP \u8BBF\u95EE\u7684\u529F\u80FD\u3002</li></ul><p>\u5982\u679C\u60F3\u7814\u7A76 logback \u6E90\u7801\u7684\u8BDD\uFF0C\u53EF\u4EE5\u6309\u7167\u8FD9\u4E09\u4E2A\u6A21\u5757\u53BB\u7814\u7A76\u3002</p><h2 id="\u76F4\u63A5\u4E0A\u624B" tabindex="-1"><a class="header-anchor" href="#\u76F4\u63A5\u4E0A\u624B" aria-hidden="true">#</a> \u76F4\u63A5\u4E0A\u624B</h2><p>\u4E0D\u5E9F\u8BDD\uFF0C\u76F4\u63A5\u65B0\u5EFA\u4E00\u4E2A\u7A7A\u7684 Spring Boot \u9879\u76EE\uFF0C\u5728\u6D4B\u8BD5\u7C7B\u4E2D\u52A0\u4E0A\u4E24\u884C\u4EE3\u7801\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token annotation punctuation">@SpringBootTest</span>
 <span class="token keyword">class</span> <span class="token class-name">CodingmoreLogbackApplicationTests</span> <span class="token punctuation">{</span>
   <span class="token keyword">static</span> <span class="token class-name">Logger</span> logger <span class="token operator">=</span> <span class="token class-name">LoggerFactory</span><span class="token punctuation">.</span><span class="token function">getLogger</span><span class="token punctuation">(</span><span class="token class-name">CodingmoreLogbackApplicationTests</span><span class="token punctuation">.</span><span class="token keyword">class</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
   <span class="token annotation punctuation">@Test</span>
@@ -9,7 +9,7 @@ import{_ as o}from"./plugin-vue_export-helper.21dcd24c.js";import{r as t,o as c,
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>Logger \u548C LoggerFactory \u90FD\u6765\u81EA SLF4J\uFF0C\u6240\u4EE5\u5982\u679C\u9879\u76EE\u662F\u4ECE Log4j + SLF4J \u5207\u6362\u5230 Logback \u7684\u8BDD\uFF0C\u6B64\u65F6\u7684\u4EE3\u7801\u662F\u96F6\u6539\u52A8\u7684\u3002</p><p>\u5176\u4ED6\u4EC0\u4E48\u4E5F\u4E0D\u7528\u505A\uFF0C\u8FD0\u884C\u540E\u5C31\u53EF\u4EE5\u770B\u5230 logback \u5DF2\u7ECF\u6B63\u5E38\u5DE5\u4F5C\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/logback-07c6b600-3667-4113-bbd5-5ec25990e9dc.png" alt=""></p><p>\u5728\u6CA1\u6709\u914D\u7F6E\u6587\u4EF6\u7684\u60C5\u51B5\u4E0B\uFF0C\u4E00\u5207\u90FD\u662F\u9ED8\u8BA4\u7684\uFF0CLogback \u7684\u65E5\u5FD7\u4FE1\u606F\u4F1A\u8F93\u51FA\u5230\u63A7\u5236\u53F0\u3002\u53EF\u4EE5\u901A\u8FC7 StatusPrinter \u6765\u6253\u5370 Logback \u7684\u5185\u90E8\u4FE1\u606F\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">LoggerContext</span> lc <span class="token operator">=</span> <span class="token punctuation">(</span><span class="token class-name">LoggerContext</span><span class="token punctuation">)</span><span class="token class-name">LoggerFactory</span><span class="token punctuation">.</span><span class="token function">getILoggerFactory</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 <span class="token class-name">StatusPrinter</span><span class="token punctuation">.</span><span class="token function">print</span><span class="token punctuation">(</span>lc<span class="token punctuation">)</span><span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><p>\u518D\u6B21\u8FD0\u884C\u6D4B\u8BD5\u7C7B\uFF0C\u53EF\u4EE5\u5728\u63A7\u5236\u53F0\u770B\u5230\u4EE5\u4E0B\u4FE1\u606F\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/logback-05b134ab-b6e6-4a10-a00c-41b829938618.png" alt=""></p><p>\u4E5F\u5C31\u662F\u8BF4\uFF0CLogback \u4F1A\u5728 classpath \u8DEF\u5F84\u4E0B\u5148\u5BFB\u627E logback-test.xml \u6587\u4EF6\uFF0C\u6CA1\u6709\u627E\u5230\u7684\u8BDD\uFF0C\u5BFB\u627E logback.xml \u6587\u4EF6\uFF0C\u90FD\u627E\u4E0D\u5230\u7684\u8BDD\uFF0C\u5C31\u8F93\u51FA\u5230\u63A7\u5236\u53F0\u3002</p><p>\u5E76\u4E14\uFF0CLogger \u7684\u9ED8\u8BA4\u65E5\u5FD7\u7EA7\u522B\u662F INFO \u7EA7\u522B\u7684\uFF0C\u8FD9\u5C31\u610F\u5473\u7740\u5982\u679C\u5C1D\u8BD5\u4E0B\u9762\u7684\u4EE3\u7801\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code>logger<span class="token punctuation">.</span><span class="token function">debug</span><span class="token punctuation">(</span><span class="token string">&quot;\u6C89\u9ED8\u738B\u4E8C\u662F\u50BB X&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>\u63A7\u5236\u53F0\u662F\u770B\u4E0D\u5230\u8FD9\u884C\u65E5\u5FD7\u8F93\u51FA\u7684\u3002Logback \u7684\u65E5\u5FD7\u7EA7\u522B\u662F\u8FD9\u6837\u7684\uFF1A</p><blockquote><p>TRACE &lt; DEBUG &lt; INFO &lt; WARN &lt; ERROR</p></blockquote><p>\u4E5F\u5C31\u662F\u8BF4\u5C0F\u4E8E INFO \u7EA7\u522B\u7684\u65E5\u5FD7\u90FD\u4E0D\u4F1A\u8BB0\u5F55\uFF0C\u53EA\u6709\u5927\u4E8E\u7B49\u4E8E INFO \u7EA7\u522B\u7684\u65E5\u5FD7\u624D\u4F1A\u88AB\u8BB0\u5F55\u3002</p><h3 id="\u7F16\u7A0B\u55B5\u5B9E\u6218\u9879\u76EE\u7684\u65E5\u5FD7\u6848\u4F8B\u5206\u6790" tabindex="-1"><a class="header-anchor" href="#\u7F16\u7A0B\u55B5\u5B9E\u6218\u9879\u76EE\u7684\u65E5\u5FD7\u6848\u4F8B\u5206\u6790" aria-hidden="true">#</a> \u7F16\u7A0B\u55B5\u5B9E\u6218\u9879\u76EE\u7684\u65E5\u5FD7\u6848\u4F8B\u5206\u6790</h3><p>\u5C3D\u7BA1\u9ED8\u8BA4\u914D\u7F6E\u5F88\u6709\u7528\uFF0C\u4F46\u5B83\u5F88\u53EF\u80FD\u4E0D\u80FD\u6EE1\u8DB3\u6211\u4EEC\u7684\u5B9E\u9645\u5F00\u53D1\u9700\u6C42\uFF0C\u4E8E\u662F\u6211\u4EEC\u9700\u8981\u627E\u5230\u4E00\u79CD\u66F4\u4F18\u96C5\u7684\u89E3\u51B3\u65B9\u6848\u3002</p><p>\u5F53 <code>src/main/resources</code> \u76EE\u5F55\u4E0B\u6709\u4EE5\u4E0B\u540D\u79F0\u4E4B\u4E00\u7684\u914D\u7F6E\u6587\u4EF6\u65F6\uFF0CSpring Boot \u5C06\u81EA\u52A8\u52A0\u8F7D\u5B83\u6765\u4F5C\u4E3A Logback \u7684\u914D\u7F6E\u9879\uFF1A</p><ul><li>logback-spring.xml</li><li>logback.xml</li><li>logback-spring.groovy</li><li>logback.groovy</li></ul><p>Spring Boot \u5EFA\u8BAE\u6211\u4EEC\u4F7F\u7528 <code>-spring</code> \u7ED3\u5C3E\u7684\u914D\u7F6E\u6587\u4EF6\uFF0C\u8FD9\u6837\u53EF\u4EE5\u4F7F\u7528 Spring Boot \u7684 Pro\uFB01le \u529F\u80FD\uFF08\u9488\u5BF9\u4E0D\u540C\u7684\u73AF\u5883\uFF08\u5F00\u53D1\u73AF\u5883\u3001\u6D4B\u8BD5\u73AF\u5883\u3001\u6B63\u5F0F\u73AF\u5883\uFF09\u63D0\u4F9B\u4E0D\u540C\u7684\u914D\u7F6E\u9879\uFF09\u3002</p><p>\u7F16\u7A0B\u55B5\u7528\u7684\u662F logback-spring.xml\uFF08\u5728 codingmore-admin \u9879\u76EE\u4E0B\u53EF\u4EE5\u627E\u5F97\u5230\uFF09\uFF1A</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;!--
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>\u63A7\u5236\u53F0\u662F\u770B\u4E0D\u5230\u8FD9\u884C\u65E5\u5FD7\u8F93\u51FA\u7684\u3002Logback \u7684\u65E5\u5FD7\u7EA7\u522B\u662F\u8FD9\u6837\u7684\uFF1A</p><blockquote><p>TRACE &lt; DEBUG &lt; INFO &lt; WARN &lt; ERROR</p></blockquote><p>\u4E5F\u5C31\u662F\u8BF4\u5C0F\u4E8E INFO \u7EA7\u522B\u7684\u65E5\u5FD7\u90FD\u4E0D\u4F1A\u8BB0\u5F55\uFF0C\u53EA\u6709\u5927\u4E8E\u7B49\u4E8E INFO \u7EA7\u522B\u7684\u65E5\u5FD7\u624D\u4F1A\u88AB\u8BB0\u5F55\u3002</p><h2 id="\u7F16\u7A0B\u55B5\u5B9E\u6218\u9879\u76EE\u7684\u65E5\u5FD7\u6848\u4F8B\u5206\u6790" tabindex="-1"><a class="header-anchor" href="#\u7F16\u7A0B\u55B5\u5B9E\u6218\u9879\u76EE\u7684\u65E5\u5FD7\u6848\u4F8B\u5206\u6790" aria-hidden="true">#</a> \u7F16\u7A0B\u55B5\u5B9E\u6218\u9879\u76EE\u7684\u65E5\u5FD7\u6848\u4F8B\u5206\u6790</h2><p>\u5C3D\u7BA1\u9ED8\u8BA4\u914D\u7F6E\u5F88\u6709\u7528\uFF0C\u4F46\u5B83\u5F88\u53EF\u80FD\u4E0D\u80FD\u6EE1\u8DB3\u6211\u4EEC\u7684\u5B9E\u9645\u5F00\u53D1\u9700\u6C42\uFF0C\u4E8E\u662F\u6211\u4EEC\u9700\u8981\u627E\u5230\u4E00\u79CD\u66F4\u4F18\u96C5\u7684\u89E3\u51B3\u65B9\u6848\u3002</p><p>\u5F53 <code>src/main/resources</code> \u76EE\u5F55\u4E0B\u6709\u4EE5\u4E0B\u540D\u79F0\u4E4B\u4E00\u7684\u914D\u7F6E\u6587\u4EF6\u65F6\uFF0CSpring Boot \u5C06\u81EA\u52A8\u52A0\u8F7D\u5B83\u6765\u4F5C\u4E3A Logback \u7684\u914D\u7F6E\u9879\uFF1A</p><ul><li>logback-spring.xml</li><li>logback.xml</li><li>logback-spring.groovy</li><li>logback.groovy</li></ul><p>Spring Boot \u5EFA\u8BAE\u6211\u4EEC\u4F7F\u7528 <code>-spring</code> \u7ED3\u5C3E\u7684\u914D\u7F6E\u6587\u4EF6\uFF0C\u8FD9\u6837\u53EF\u4EE5\u4F7F\u7528 Spring Boot \u7684 Pro\uFB01le \u529F\u80FD\uFF08\u9488\u5BF9\u4E0D\u540C\u7684\u73AF\u5883\uFF08\u5F00\u53D1\u73AF\u5883\u3001\u6D4B\u8BD5\u73AF\u5883\u3001\u6B63\u5F0F\u73AF\u5883\uFF09\u63D0\u4F9B\u4E0D\u540C\u7684\u914D\u7F6E\u9879\uFF09\u3002</p><p>\u7F16\u7A0B\u55B5\u7528\u7684\u662F logback-spring.xml\uFF08\u5728 codingmore-admin \u9879\u76EE\u4E0B\u53EF\u4EE5\u627E\u5F97\u5230\uFF09\uFF1A</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;!--
 configuration \u6709\u4E09\u4E2A\u5C5E\u6027\uFF1A
 scan\uFF1A\u5F53\u6B64\u5C5E\u6027\u8BBE\u7F6E\u4E3Atrue\u65F6\uFF0C\u914D\u7F6E\u6587\u4EF6\u5982\u679C\u53D1\u751F\u6539\u53D8\uFF0C\u5C06\u4F1A\u88AB\u91CD\u65B0\u52A0\u8F7D\uFF0C\u9ED8\u8BA4\u503C\u4E3Atrue\u3002
 scanPeriod\uFF1A\u8BBE\u7F6E\u76D1\u6D4B\u914D\u7F6E\u6587\u4EF6\u662F\u5426\u6709\u4FEE\u6539\u7684\u65F6\u95F4\u95F4\u9694\uFF0C\u5982\u679C\u6CA1\u6709\u7ED9\u51FA\u65F6\u95F4\u5355\u4F4D\uFF0C\u9ED8\u8BA4\u5355\u4F4D\u662F\u6BEB\u79D2\u5F53scan\u4E3Atrue\u65F6\uFF0C\u6B64\u5C5E\u6027\u751F\u6548\u3002\u9ED8\u8BA4\u7684\u65F6\u95F4\u95F4\u9694\u4E3A1\u5206\u949F\u3002
@@ -119,7 +119,7 @@ debug\uFF1A\u5F53\u6B64\u5C5E\u6027\u8BBE\u7F6E\u4E3Atrue\u65F6\uFF0C\u5C06\u625
         &lt;appender-ref ref=&quot;APPLICATION&quot; /&gt;
     &lt;/root&gt;
 &lt;/configuration&gt;
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>\u53EA\u8BF4\u51E0\u4E2A\u4E0D\u540C\u7684\u70B9\u3002</p><p><code>FILE_LOG_PATTERN</code> \u548C <code>CONSOLE_LOG_PATTERN</code> \u662F\u5728 Spring Boot \u4E2D\u9ED8\u8BA4\u5B9A\u4E49\u7684\u3002</p>`,43),u={href:"https://github.com/spring-projects/spring-boot/blob/main/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/logging/logback/DefaultLogbackConfiguration.java",target:"_blank",rel:"noopener noreferrer"},v=e("https://github.com/spring-projects/spring-boot/blob/main/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/logging/logback/DefaultLogbackConfiguration.java"),b=i(`<p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/logback-87217069-b756-4c0c-945e-06ecc5785b81.png" alt=""></p><p>SizeAndTimeBasedRollingPolicy \u6BD4 TimeBasedRollingPolicy \u591A\u4E86\u4E00\u4E2A\u65E5\u5FD7\u6587\u4EF6\u5927\u5C0F\u8BBE\u5B9A\u7684\u5C5E\u6027\uFF1AmaxFileSize\uFF0C\u5176\u4ED6\u5B8C\u5168\u4E00\u6837\u3002</p><p>totalSizeCap\uFF0C\u6240\u6709\u65E5\u5FD7\u6587\u4EF6\u7684\u5927\u5C0F\uFF08\u53EF\u9009\u9879\uFF09\u3002\u8D85\u51FA\u8FD9\u4E2A\u5927\u5C0F\u65F6\uFF0C\u65E7\u7684\u65E5\u5FD7\u6587\u4EF6\u5C06\u4F1A\u88AB\u5F02\u6B65\u5220\u9664\u3002\u9700\u8981\u914D\u5408 maxHistory \u5C5E\u6027\u4E00\u8D77\u4F7F\u7528\uFF0C\u5E76\u4E14\u662F\u7B2C\u4E8C\u6761\u4EF6\u3002</p><p>\u5728Intellij IDEA \u4E2D\u542F\u52A8\u9879\u76EE\uFF0C\u6211\u4EEC\u6765\u67E5\u770B\u4E00\u4E0B\u914D\u7F6E\u540E\u7684\u65E5\u5FD7\u6548\u679C\uFF08\u63A7\u5236\u53F0\u4E2D\uFF09\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/logback-1a849206-617e-45d5-b199-50787c12e9bc.png" alt=""></p><p>\u7531\u4E8E\u6211\u4EEC\u52A0\u4E86\u989C\u8272\u914D\u7F6E\uFF0C\u6240\u4EE5\u63A7\u5236\u53F0\u65E5\u5FD7\u770B\u8D77\u6765\u5BF9\u773C\u775B\u66F4\u53CB\u597D\u4E86\u4E00\u4E9B\u3002</p><p>\u90A3\u914D\u7F6E\u7684\u65E5\u5FD7\u6587\u4EF6\u5728\u54EA\u91CC\u5462\uFF1F\u5728 <code>user.home</code> \u4E0B\uFF0C\u5982\u679C\u4E0D\u786E\u5B9A\u5177\u4F53\u503C\u662F\u4EC0\u4E48\u7684\u8BDD\uFF0C\u53EF\u4EE5\u901A\u8FC7 <code>System.getProperty(&quot;user.home&quot;)</code> \u83B7\u53D6\u5230\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/logback-bdb8558e-2fd0-488e-9a0a-7c78234eae7a.png" alt=""></p><p>\u987A\u7740\u8FD9\u4E2A\u8DEF\u5F84\u5C31\u53EF\u4EE5\u627E\u5230\u751F\u6210\u7684\u65E5\u5FD7\u6587\u4EF6\u4E86\uFF0C\u5E76\u4E14\u65E5\u5FD7\u7684\u751F\u6210\u7B56\u7565\u4E5F\u662F\u7B26\u5408\u6211\u4EEC\u7684\u9884\u671F\u7684\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/logback-3e5c5534-470b-4ec4-b5fa-cb2a6fbbaee4.png" alt=""></p><h3 id="\u4F7F\u7528-lombok-\u8FDB\u884C\u65E5\u5FD7\u8BB0\u5F55" tabindex="-1"><a class="header-anchor" href="#\u4F7F\u7528-lombok-\u8FDB\u884C\u65E5\u5FD7\u8BB0\u5F55" aria-hidden="true">#</a> \u4F7F\u7528 lombok \u8FDB\u884C\u65E5\u5FD7\u8BB0\u5F55</h3><p>\u5728\u4E0A\u9762\u7684\u4F8B\u5B50\u4E2D\uFF0C\u6211\u4EEC\u5FC5\u987B\u5728\u7C7B\u4E2D\u58F0\u660E\u4E00\u4E2A\u9759\u6001\u7684 Logger \u5BF9\u8C61\u624D\u80FD\u5728\u9700\u8981\u8BB0\u5F55\u65E5\u5FD7\u7684\u5730\u65B9\u4F7F\u7528\u5B83\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">static</span> <span class="token class-name">Logger</span> logger <span class="token operator">=</span> <span class="token class-name">LoggerFactory</span><span class="token punctuation">.</span><span class="token function">getLogger</span><span class="token punctuation">(</span><span class="token class-name">CodingmoreLogbackApplicationTests</span><span class="token punctuation">.</span><span class="token keyword">class</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>\u53EA\u8BF4\u51E0\u4E2A\u4E0D\u540C\u7684\u70B9\u3002</p><p><code>FILE_LOG_PATTERN</code> \u548C <code>CONSOLE_LOG_PATTERN</code> \u662F\u5728 Spring Boot \u4E2D\u9ED8\u8BA4\u5B9A\u4E49\u7684\u3002</p>`,43),g={href:"https://github.com/spring-projects/spring-boot/blob/main/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/logging/logback/DefaultLogbackConfiguration.java",target:"_blank",rel:"noopener noreferrer"},p=e("https://github.com/spring-projects/spring-boot/blob/main/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/logging/logback/DefaultLogbackConfiguration.java"),u=t(`<p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/logback-87217069-b756-4c0c-945e-06ecc5785b81.png" alt=""></p><p>SizeAndTimeBasedRollingPolicy \u6BD4 TimeBasedRollingPolicy \u591A\u4E86\u4E00\u4E2A\u65E5\u5FD7\u6587\u4EF6\u5927\u5C0F\u8BBE\u5B9A\u7684\u5C5E\u6027\uFF1AmaxFileSize\uFF0C\u5176\u4ED6\u5B8C\u5168\u4E00\u6837\u3002</p><p>totalSizeCap\uFF0C\u6240\u6709\u65E5\u5FD7\u6587\u4EF6\u7684\u5927\u5C0F\uFF08\u53EF\u9009\u9879\uFF09\u3002\u8D85\u51FA\u8FD9\u4E2A\u5927\u5C0F\u65F6\uFF0C\u65E7\u7684\u65E5\u5FD7\u6587\u4EF6\u5C06\u4F1A\u88AB\u5F02\u6B65\u5220\u9664\u3002\u9700\u8981\u914D\u5408 maxHistory \u5C5E\u6027\u4E00\u8D77\u4F7F\u7528\uFF0C\u5E76\u4E14\u662F\u7B2C\u4E8C\u6761\u4EF6\u3002</p><p>\u5728Intellij IDEA \u4E2D\u542F\u52A8\u9879\u76EE\uFF0C\u6211\u4EEC\u6765\u67E5\u770B\u4E00\u4E0B\u914D\u7F6E\u540E\u7684\u65E5\u5FD7\u6548\u679C\uFF08\u63A7\u5236\u53F0\u4E2D\uFF09\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/logback-1a849206-617e-45d5-b199-50787c12e9bc.png" alt=""></p><p>\u7531\u4E8E\u6211\u4EEC\u52A0\u4E86\u989C\u8272\u914D\u7F6E\uFF0C\u6240\u4EE5\u63A7\u5236\u53F0\u65E5\u5FD7\u770B\u8D77\u6765\u5BF9\u773C\u775B\u66F4\u53CB\u597D\u4E86\u4E00\u4E9B\u3002</p><p>\u90A3\u914D\u7F6E\u7684\u65E5\u5FD7\u6587\u4EF6\u5728\u54EA\u91CC\u5462\uFF1F\u5728 <code>user.home</code> \u4E0B\uFF0C\u5982\u679C\u4E0D\u786E\u5B9A\u5177\u4F53\u503C\u662F\u4EC0\u4E48\u7684\u8BDD\uFF0C\u53EF\u4EE5\u901A\u8FC7 <code>System.getProperty(&quot;user.home&quot;)</code> \u83B7\u53D6\u5230\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/logback-bdb8558e-2fd0-488e-9a0a-7c78234eae7a.png" alt=""></p><p>\u987A\u7740\u8FD9\u4E2A\u8DEF\u5F84\u5C31\u53EF\u4EE5\u627E\u5230\u751F\u6210\u7684\u65E5\u5FD7\u6587\u4EF6\u4E86\uFF0C\u5E76\u4E14\u65E5\u5FD7\u7684\u751F\u6210\u7B56\u7565\u4E5F\u662F\u7B26\u5408\u6211\u4EEC\u7684\u9884\u671F\u7684\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/logback-3e5c5534-470b-4ec4-b5fa-cb2a6fbbaee4.png" alt=""></p><h2 id="\u4F7F\u7528-lombok-\u8FDB\u884C\u65E5\u5FD7\u8BB0\u5F55" tabindex="-1"><a class="header-anchor" href="#\u4F7F\u7528-lombok-\u8FDB\u884C\u65E5\u5FD7\u8BB0\u5F55" aria-hidden="true">#</a> \u4F7F\u7528 lombok \u8FDB\u884C\u65E5\u5FD7\u8BB0\u5F55</h2><p>\u5728\u4E0A\u9762\u7684\u4F8B\u5B50\u4E2D\uFF0C\u6211\u4EEC\u5FC5\u987B\u5728\u7C7B\u4E2D\u58F0\u660E\u4E00\u4E2A\u9759\u6001\u7684 Logger \u5BF9\u8C61\u624D\u80FD\u5728\u9700\u8981\u8BB0\u5F55\u65E5\u5FD7\u7684\u5730\u65B9\u4F7F\u7528\u5B83\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">static</span> <span class="token class-name">Logger</span> logger <span class="token operator">=</span> <span class="token class-name">LoggerFactory</span><span class="token punctuation">.</span><span class="token function">getLogger</span><span class="token punctuation">(</span><span class="token class-name">CodingmoreLogbackApplicationTests</span><span class="token punctuation">.</span><span class="token keyword">class</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>\u8FD9\u6837\u7684\u6837\u677F\u4EE3\u7801\u4EE4\u4EBA\u751F\u538C\uFF01</p><p>\u6211\u4EEC\u53EF\u4EE5\u901A\u8FC7 lombok \u7684\u65B9\u5F0F\u6765\u89E3\u51B3\u8FD9\u4E2A\u95EE\u9898\uFF0C\u5728 pom.xml \u6587\u4EF6\u4E2D\u52A0\u5165\u4F9D\u8D56\u3002</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
   &lt;groupId&gt;org.projectlombok&lt;/groupId&gt;
   &lt;artifactId&gt;lombok&lt;/artifactId&gt;
@@ -133,4 +133,4 @@ class CodingmoreLogbackApplicationTests {
     log.info(&quot;\u6C89\u9ED8\u738B\u4E8C\u662F\u4E2A\u5927\u715E\u7B14&quot;);
   }
 }
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><hr>`,19),m=e("\u66F4\u591A\u5185\u5BB9\uFF0C\u53EA\u9488\u5BF9\u300AJava \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF\u300B\u661F\u7403\u7528\u6237\u5F00\u653E\uFF0C\u9700\u8981\u7684\u5C0F\u4F19\u4F34\u53EF\u4EE5"),k=e("\u6233\u94FE\u63A5\u{1F517}"),h=e("\u52A0\u5165\u6211\u4EEC\u7684\u661F\u7403\uFF0C\u4E00\u8D77\u5B66\u4E60\uFF0C\u4E00\u8D77\u5377\u3002\u3002"),q=n("strong",null,"\u7F16\u7A0B\u55B5",-1),L=e("\u{1F431}\u662F\u4E00\u4E2A Spring Boot+Vue \u7684\u524D\u540E\u7AEF\u5206\u79BB\u9879\u76EE\uFF0C\u878D\u5408\u4E86\u5E02\u9762\u4E0A\u7EDD\u5927\u591A\u6570\u6D41\u884C\u7684\u6280\u672F\u8981\u70B9\u3002\u901A\u8FC7\u5B66\u4E60\u5B9E\u6218\u9879\u76EE\uFF0C\u4F60\u53EF\u4EE5\u5C06\u6240\u5B66\u7684\u77E5\u8BC6\u901A\u8FC7\u5B9E\u8DF5\u8FDB\u884C\u68C0\u9A8C\u3001\u4F60\u53EF\u4EE5\u62D3\u5BBD\u81EA\u5DF1\u7684\u6280\u672F\u8FB9\u754C\uFF0C\u4F60\u53EF\u4EE5\u638C\u63E1\u4E00\u4E2A\u771F\u6B63\u7684\u5B9E\u6218\u9879\u76EE\u662F\u5982\u4F55\u4ECE 0 \u5230 1 \u7684\u3002"),f=n("hr",null,null,-1),_=n("p",null,[n("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/logback-cd491159-e48e-4c74-a67f-7962a45e847f.png",alt:""})],-1),y=n("h3",{id:"\u6E90\u7801\u8DEF\u5F84",tabindex:"-1"},[n("a",{class:"header-anchor",href:"#\u6E90\u7801\u8DEF\u5F84","aria-hidden":"true"},"#"),e(" \u6E90\u7801\u8DEF\u5F84")],-1),x=e("\u7F16\u7A0B\u55B5\uFF1A"),j={href:"https://github.com/itwanger/coding-more",target:"_blank",rel:"noopener noreferrer"},S=e("https://github.com/itwanger/coding-more"),P=e("Logback \u8BE6\u7EC6\u914D\u7F6E\u4E13\u7528\uFF1A"),A={href:"https://github.com/itwanger/codingmore-learning/tree/main/codingmore-logback",target:"_blank",rel:"noopener noreferrer"},T=e("https://github.com/itwanger/coding-more"),F=n("p",null,[n("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png",alt:""})],-1);function N(O,E){const s=t("ExternalLinkIcon"),l=t("RouterLink");return c(),r("div",null,[p,n("blockquote",null,[n("p",null,[n("a",u,[v,a(s)])])]),b,n("p",null,[m,a(l,{to:"/springboot/docs/zhishixingqiu/"},{default:d(()=>[k]),_:1}),h,q,L]),f,_,y,n("blockquote",null,[n("ul",null,[n("li",null,[x,n("a",j,[S,a(s)])]),n("li",null,[P,n("a",A,[T,a(s)])])])]),F])}var C=o(g,[["render",N],["__file","logback.html.vue"]]);export{C as default};
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><hr>`,19),v=e("\u66F4\u591A\u5185\u5BB9\uFF0C\u53EA\u9488\u5BF9\u300AJava \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF\u300B\u661F\u7403\u7528\u6237\u5F00\u653E\uFF0C\u9700\u8981\u7684\u5C0F\u4F19\u4F34\u53EF\u4EE5"),b={href:"https://tobebetterjavaer.com/zhishixingqiu/",target:"_blank",rel:"noopener noreferrer"},m=e("\u6233\u94FE\u63A5\u{1F517}"),k=e("\u52A0\u5165\u6211\u4EEC\u7684\u661F\u7403\uFF0C\u4E00\u8D77\u5B66\u4E60\uFF0C\u4E00\u8D77\u5377\u3002\u3002"),h=n("strong",null,"\u7F16\u7A0B\u55B5",-1),q=e("\u{1F431}\u662F\u4E00\u4E2A Spring Boot+Vue \u7684\u524D\u540E\u7AEF\u5206\u79BB\u9879\u76EE\uFF0C\u878D\u5408\u4E86\u5E02\u9762\u4E0A\u7EDD\u5927\u591A\u6570\u6D41\u884C\u7684\u6280\u672F\u8981\u70B9\u3002\u901A\u8FC7\u5B66\u4E60\u5B9E\u6218\u9879\u76EE\uFF0C\u4F60\u53EF\u4EE5\u5C06\u6240\u5B66\u7684\u77E5\u8BC6\u901A\u8FC7\u5B9E\u8DF5\u8FDB\u884C\u68C0\u9A8C\u3001\u4F60\u53EF\u4EE5\u62D3\u5BBD\u81EA\u5DF1\u7684\u6280\u672F\u8FB9\u754C\uFF0C\u4F60\u53EF\u4EE5\u638C\u63E1\u4E00\u4E2A\u771F\u6B63\u7684\u5B9E\u6218\u9879\u76EE\u662F\u5982\u4F55\u4ECE 0 \u5230 1 \u7684\u3002"),L=n("hr",null,null,-1),f=n("p",null,[n("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/logback-cd491159-e48e-4c74-a67f-7962a45e847f.png",alt:""})],-1),_=n("h2",{id:"\u6E90\u7801\u8DEF\u5F84",tabindex:"-1"},[n("a",{class:"header-anchor",href:"#\u6E90\u7801\u8DEF\u5F84","aria-hidden":"true"},"#"),e(" \u6E90\u7801\u8DEF\u5F84")],-1),y=e("\u7F16\u7A0B\u55B5\uFF1A"),x={href:"https://github.com/itwanger/coding-more",target:"_blank",rel:"noopener noreferrer"},j=e("https://github.com/itwanger/coding-more"),S=e("Logback \u8BE6\u7EC6\u914D\u7F6E\u4E13\u7528\uFF1A"),P={href:"https://github.com/itwanger/codingmore-learning/tree/main/codingmore-logback",target:"_blank",rel:"noopener noreferrer"},A=e("https://github.com/itwanger/coding-more"),T=n("p",null,[n("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png",alt:""})],-1);function F(N,O){const a=l("ExternalLinkIcon");return o(),c("div",null,[d,n("blockquote",null,[n("p",null,[n("a",g,[p,s(a)])])]),u,n("p",null,[v,n("a",b,[m,s(a)]),k,h,q]),L,f,_,n("blockquote",null,[n("ul",null,[n("li",null,[y,n("a",x,[j,s(a)])]),n("li",null,[S,n("a",P,[A,s(a)])])])]),T])}var B=i(r,[["render",F],["__file","logback.html.vue"]]);export{B as default};
diff --git a/dist/assets/macos-codingmore-run.html.984613a6.js b/dist/assets/macos-codingmore-run.html.100361aa.js
similarity index 99%
rename from dist/assets/macos-codingmore-run.html.984613a6.js
rename to dist/assets/macos-codingmore-run.html.100361aa.js
index 0e2598f9..526d01ad 100644
--- a/dist/assets/macos-codingmore-run.html.984613a6.js
+++ b/dist/assets/macos-codingmore-run.html.100361aa.js
@@ -1,4 +1,4 @@
-import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{r as c,o as i,c as s,a as e,b as a,e as r,d as t}from"./app.a0271b9c.js";const d={},b=r('<h2 id="\u524D\u7F6E\u73AF\u5883\u7684\u51C6\u5907" tabindex="-1"><a class="header-anchor" href="#\u524D\u7F6E\u73AF\u5883\u7684\u51C6\u5907" aria-hidden="true">#</a> \u524D\u7F6E\u73AF\u5883\u7684\u51C6\u5907</h2><ul><li>\u4E00\u53F0\u53EF\u4EE5\u5F00\u673A\u7684\u7535\u8111</li><li>JDK 8</li><li>Maven</li><li>Intellij IDEA\uFF08\u975E\u5FC5\u987B\uFF0C\u53EF\u7528 Eclipse\uFF09</li><li>Visual Studio Code\uFF08\u975E\u5FC5\u987B\uFF0C\u53EF\u7528 hbuilderx\uFF09</li><li>MySQL</li><li>Redis\uFF08\u975E\u5FC5\u987B\uFF0C\u4F1A\u62A5\u9519\uFF0C\u4F46\u4E0D\u5F71\u54CD\u8DD1\uFF09</li><li>OSS\uFF08\u975E\u5FC5\u987B\uFF0C\u4E0A\u4F20\u56FE\u7247\u65F6\u62A5\u9519\uFF0C\u4F46\u4E0D\u5F71\u54CD\u8DD1\uFF09</li></ul><p>\u5BF9\uFF0C\u7F16\u7A0B\u55B5 \u{1F431}\uFF08Spring Boot+Vue \u7684\u524D\u540E\u7AEF\u5206\u79BB\u9879\u76EE\uFF09\u8981\u60F3\u5728\u672C\u5730\u8DD1\u8D77\u6765\uFF0C\u9700\u8981\u8FD9 8 \u4E2A\u524D\u7F6E\u73AF\u5883\u3002</p><p>\u7B2C\u4E00\u4E2A\u6761\u4EF6\uFF0C\u4E00\u53F0\u53EF\u4EE5\u5F00\u673A\u7684\u7535\u8111\uFF0C\u663E\u7136\u6211\u76F8\u4FE1\u5927\u5BB6\u90FD\u662F\u6709\u7684\u3002\u4E0D\u7136\u600E\u4E48\u5B66\u7F16\u7A0B\u662F\u5427\uFF1F\u77A7\u6211\u8FD9\u5E9F\u8BDD\u771F\u591A\u3002</p><p>\u8FD9\u7BC7\u5148\u4EE5 macOS \u4E3A\u4F8B\uFF0CWindows \u7684\u8BDD\uFF0C\u6211\u53E6\u5F00\u4E00\u7BC7\u3002\u4E0B\u56FE\u662F\u6211\u7684\u4E3B\u529B\u673A iMac \u7684\u914D\u7F6E\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-d98d5c3c-24a9-4d69-a11d-0b323f0c6bb5.png" alt=""></p>',6),p=t("\u7B2C\u4E8C\u4E2A\u6761\u4EF6\uFF0CJDK 8\uFF0C\u53EF\u4EE5\u901A\u8FC7 "),m={href:"https://brew.sh/index_zh-cn",target:"_blank",rel:"noopener noreferrer"},g=t("homebrew"),l=t("\uFF08macOS \u8F6F\u4EF6\u5305\u7BA1\u7406\u5668\uFF09\u5B89\u88C5\uFF0C\u975E\u5E38\u65B9\u9762\uFF0C\u7136\u540E\u7528 "),h={href:"https://www.jenv.be/",target:"_blank",rel:"noopener noreferrer"},u=t("jenv"),_=t(" \u6765\u7BA1\u7406 Java \u7248\u672C\u3002"),v=r(`<p>\u6267\u884C <code>brew -v</code> \u53EF\u4EE5\u67E5\u770B homebrew \u7248\u672C</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-ac4ffa12-4b90-459b-a548-bd91e105f531.png" alt=""></p><p>\u6267\u884C <code>brew install java</code> \u53EF\u4EE5\u5B89\u88C5\u6700\u65B0\u7248 JDK\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-c80146c8-24f0-40ee-ab6b-696bc4a6589d.png" alt=""></p><p>\u6267\u884C <code>brew install adoptopenjdk/openjdk/adoptopenjdk8 --cask</code> \u53EF\u4EE5\u5B89\u88C5\u6700 JDK 8\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-6a46e999-b309-4adc-9567-ade05f55f174.png" alt=""></p><p>\u6267\u884C <code>ls /Library/Java/JavaVirtualMachines/</code> \u53EF\u4EE5\u67E5\u770B\u672C\u673A\u6240\u6709\u5B89\u88C5\u8FC7\u7684 JDK \u5305\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-7b8ee4ad-db7d-4cc6-a9bc-323083eb319c.png" alt=""></p><p>\u901A\u8FC7 <code>jenv add adoptopenjdk-8.jdk/Contents/Home/</code> \u53EF\u4EE5\u5C06\u5B89\u88C5\u8FC7\u7684 JDK \u52A0\u5165\u5230 jenv \u7248\u672C\u5E93\u4E2D\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-f34a88d5-6c50-4eec-8343-77518aaf9a4f.png" alt=""></p><p>\u6267\u884C <code>jenv global openjdk64-1.8.0.292</code> \u53EF\u4EE5\u6307\u5B9A\u5F53\u524D\u7684 JDK \u7248\u672C\u3002\u518D\u6267\u884C <code>jenv versions</code> \u53EF\u4EE5\u67E5\u770B\u9ED8\u8BA4\u4F7F\u7528\u7684 JDK \u7248\u672C\uFF08\u5E26<code>*</code>\u7684\uFF09</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-05d7d17f-d214-40c7-98d8-e67083ed38fb.png" alt=""></p><p>\u6267\u884C <code>java -version</code> \u53EF\u4EE5\u67E5\u770B\u5F53\u524D JDK \u7248\u672C</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-a1bb43ca-b3b8-4681-b290-6ddbdf2bc1fc.png" alt=""></p><p>\u7B2C\u4E09\u4E2A\u6761\u4EF6\uFF0CMaven\uFF0C\u53EF\u4EE5\u76F4\u63A5\u901A\u8FC7 <code>brew install maven</code> \u6765\u5B8C\u6210\u5B89\u88C5\u3002\u901A\u8FC7 <code>mvn -v</code> \u6765\u67E5\u770B\u7248\u672C\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-9b4dab03-c720-4f23-8a1e-90fa55130c73.png" alt=""></p><p>\u4E3A\u4E86\u52A0\u5FEB\u9879\u76EE\u4F9D\u8D56\u5305\u7684\u4E0B\u8F7D\u901F\u5EA6\uFF0C\u6211\u4EEC\u9700\u8981\u914D\u7F6E Maven \u7684\u56FD\u5185\u955C\u50CF\u6E90\u3002</p><p>\u627E\u5230 Maven Home\uFF08<code>/Users/yourpath/save/apache-maven-3.8.3</code>\uFF09\uFF0C\u590D\u5236\u4E00\u4EFD settings.xml\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-7743fabc-1a49-44a6-8862-1f31c94b0633.png" alt=""></p><p>\u5230 <code>/Users/you/.m2</code> \u8DEF\u5F84\u4E0B\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-31580aab-9990-4553-9557-41dbd748f361.png" alt=""></p><p>\u5728 mirrors \u8282\u70B9\u4E0B\u6DFB\u52A0\u963F\u91CC\u4E91\u955C\u50CF\u5730\u5740\uFF0C\u5E76\u4FDD\u5B58\u3002</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;mirror&gt;
+import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{r as c,o as i,c as s,a as e,b as a,e as r,d as t}from"./app.615e41d8.js";const d={},b=r('<h2 id="\u524D\u7F6E\u73AF\u5883\u7684\u51C6\u5907" tabindex="-1"><a class="header-anchor" href="#\u524D\u7F6E\u73AF\u5883\u7684\u51C6\u5907" aria-hidden="true">#</a> \u524D\u7F6E\u73AF\u5883\u7684\u51C6\u5907</h2><ul><li>\u4E00\u53F0\u53EF\u4EE5\u5F00\u673A\u7684\u7535\u8111</li><li>JDK 8</li><li>Maven</li><li>Intellij IDEA\uFF08\u975E\u5FC5\u987B\uFF0C\u53EF\u7528 Eclipse\uFF09</li><li>Visual Studio Code\uFF08\u975E\u5FC5\u987B\uFF0C\u53EF\u7528 hbuilderx\uFF09</li><li>MySQL</li><li>Redis\uFF08\u975E\u5FC5\u987B\uFF0C\u4F1A\u62A5\u9519\uFF0C\u4F46\u4E0D\u5F71\u54CD\u8DD1\uFF09</li><li>OSS\uFF08\u975E\u5FC5\u987B\uFF0C\u4E0A\u4F20\u56FE\u7247\u65F6\u62A5\u9519\uFF0C\u4F46\u4E0D\u5F71\u54CD\u8DD1\uFF09</li></ul><p>\u5BF9\uFF0C\u7F16\u7A0B\u55B5 \u{1F431}\uFF08Spring Boot+Vue \u7684\u524D\u540E\u7AEF\u5206\u79BB\u9879\u76EE\uFF09\u8981\u60F3\u5728\u672C\u5730\u8DD1\u8D77\u6765\uFF0C\u9700\u8981\u8FD9 8 \u4E2A\u524D\u7F6E\u73AF\u5883\u3002</p><p>\u7B2C\u4E00\u4E2A\u6761\u4EF6\uFF0C\u4E00\u53F0\u53EF\u4EE5\u5F00\u673A\u7684\u7535\u8111\uFF0C\u663E\u7136\u6211\u76F8\u4FE1\u5927\u5BB6\u90FD\u662F\u6709\u7684\u3002\u4E0D\u7136\u600E\u4E48\u5B66\u7F16\u7A0B\u662F\u5427\uFF1F\u77A7\u6211\u8FD9\u5E9F\u8BDD\u771F\u591A\u3002</p><p>\u8FD9\u7BC7\u5148\u4EE5 macOS \u4E3A\u4F8B\uFF0CWindows \u7684\u8BDD\uFF0C\u6211\u53E6\u5F00\u4E00\u7BC7\u3002\u4E0B\u56FE\u662F\u6211\u7684\u4E3B\u529B\u673A iMac \u7684\u914D\u7F6E\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-d98d5c3c-24a9-4d69-a11d-0b323f0c6bb5.png" alt=""></p>',6),p=t("\u7B2C\u4E8C\u4E2A\u6761\u4EF6\uFF0CJDK 8\uFF0C\u53EF\u4EE5\u901A\u8FC7 "),m={href:"https://brew.sh/index_zh-cn",target:"_blank",rel:"noopener noreferrer"},g=t("homebrew"),l=t("\uFF08macOS \u8F6F\u4EF6\u5305\u7BA1\u7406\u5668\uFF09\u5B89\u88C5\uFF0C\u975E\u5E38\u65B9\u9762\uFF0C\u7136\u540E\u7528 "),h={href:"https://www.jenv.be/",target:"_blank",rel:"noopener noreferrer"},u=t("jenv"),_=t(" \u6765\u7BA1\u7406 Java \u7248\u672C\u3002"),v=r(`<p>\u6267\u884C <code>brew -v</code> \u53EF\u4EE5\u67E5\u770B homebrew \u7248\u672C</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-ac4ffa12-4b90-459b-a548-bd91e105f531.png" alt=""></p><p>\u6267\u884C <code>brew install java</code> \u53EF\u4EE5\u5B89\u88C5\u6700\u65B0\u7248 JDK\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-c80146c8-24f0-40ee-ab6b-696bc4a6589d.png" alt=""></p><p>\u6267\u884C <code>brew install adoptopenjdk/openjdk/adoptopenjdk8 --cask</code> \u53EF\u4EE5\u5B89\u88C5\u6700 JDK 8\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-6a46e999-b309-4adc-9567-ade05f55f174.png" alt=""></p><p>\u6267\u884C <code>ls /Library/Java/JavaVirtualMachines/</code> \u53EF\u4EE5\u67E5\u770B\u672C\u673A\u6240\u6709\u5B89\u88C5\u8FC7\u7684 JDK \u5305\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-7b8ee4ad-db7d-4cc6-a9bc-323083eb319c.png" alt=""></p><p>\u901A\u8FC7 <code>jenv add adoptopenjdk-8.jdk/Contents/Home/</code> \u53EF\u4EE5\u5C06\u5B89\u88C5\u8FC7\u7684 JDK \u52A0\u5165\u5230 jenv \u7248\u672C\u5E93\u4E2D\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-f34a88d5-6c50-4eec-8343-77518aaf9a4f.png" alt=""></p><p>\u6267\u884C <code>jenv global openjdk64-1.8.0.292</code> \u53EF\u4EE5\u6307\u5B9A\u5F53\u524D\u7684 JDK \u7248\u672C\u3002\u518D\u6267\u884C <code>jenv versions</code> \u53EF\u4EE5\u67E5\u770B\u9ED8\u8BA4\u4F7F\u7528\u7684 JDK \u7248\u672C\uFF08\u5E26<code>*</code>\u7684\uFF09</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-05d7d17f-d214-40c7-98d8-e67083ed38fb.png" alt=""></p><p>\u6267\u884C <code>java -version</code> \u53EF\u4EE5\u67E5\u770B\u5F53\u524D JDK \u7248\u672C</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-a1bb43ca-b3b8-4681-b290-6ddbdf2bc1fc.png" alt=""></p><p>\u7B2C\u4E09\u4E2A\u6761\u4EF6\uFF0CMaven\uFF0C\u53EF\u4EE5\u76F4\u63A5\u901A\u8FC7 <code>brew install maven</code> \u6765\u5B8C\u6210\u5B89\u88C5\u3002\u901A\u8FC7 <code>mvn -v</code> \u6765\u67E5\u770B\u7248\u672C\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-9b4dab03-c720-4f23-8a1e-90fa55130c73.png" alt=""></p><p>\u4E3A\u4E86\u52A0\u5FEB\u9879\u76EE\u4F9D\u8D56\u5305\u7684\u4E0B\u8F7D\u901F\u5EA6\uFF0C\u6211\u4EEC\u9700\u8981\u914D\u7F6E Maven \u7684\u56FD\u5185\u955C\u50CF\u6E90\u3002</p><p>\u627E\u5230 Maven Home\uFF08<code>/Users/yourpath/save/apache-maven-3.8.3</code>\uFF09\uFF0C\u590D\u5236\u4E00\u4EFD settings.xml\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-7743fabc-1a49-44a6-8862-1f31c94b0633.png" alt=""></p><p>\u5230 <code>/Users/you/.m2</code> \u8DEF\u5F84\u4E0B\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-31580aab-9990-4553-9557-41dbd748f361.png" alt=""></p><p>\u5728 mirrors \u8282\u70B9\u4E0B\u6DFB\u52A0\u963F\u91CC\u4E91\u955C\u50CF\u5730\u5740\uFF0C\u5E76\u4FDD\u5B58\u3002</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;mirror&gt;
   &lt;id&gt;alimaven&lt;/id&gt;
   &lt;name&gt;aliyun maven&lt;/name&gt;
 &lt;url&gt;http://maven.aliyun.com/nexus/content/groups/public/&lt;/url&gt;
diff --git a/dist/assets/map.html.61b4c4d9.js b/dist/assets/map.html.6ee85b94.js
similarity index 99%
rename from dist/assets/map.html.61b4c4d9.js
rename to dist/assets/map.html.6ee85b94.js
index 8e43f044..b83f744f 100644
--- a/dist/assets/map.html.61b4c4d9.js
+++ b/dist/assets/map.html.6ee85b94.js
@@ -1,4 +1,4 @@
-import{_ as p}from"./plugin-vue_export-helper.21dcd24c.js";import{r as o,o as c,c as l,a as n,b as t,e,d as s}from"./app.a0271b9c.js";const i={},u=e(`<h1 id="\u7B80\u5355\u804A\u804Ajava\u7684\u5E76\u53D1\u96C6\u5408\u5BB9\u5668" tabindex="-1"><a class="header-anchor" href="#\u7B80\u5355\u804A\u804Ajava\u7684\u5E76\u53D1\u96C6\u5408\u5BB9\u5668" aria-hidden="true">#</a> \u7B80\u5355\u804A\u804AJava\u7684\u5E76\u53D1\u96C6\u5408\u5BB9\u5668</h1><h2 id="\u540C\u6B65\u5BB9\u5668\u4E0E\u5E76\u53D1\u5BB9\u5668" tabindex="-1"><a class="header-anchor" href="#\u540C\u6B65\u5BB9\u5668\u4E0E\u5E76\u53D1\u5BB9\u5668" aria-hidden="true">#</a> \u540C\u6B65\u5BB9\u5668\u4E0E\u5E76\u53D1\u5BB9\u5668</h2><p>\u6211\u4EEC\u77E5\u9053\u5728java.util\u5305\u4E0B\u63D0\u4F9B\u4E86\u4E00\u4E9B\u5BB9\u5668\u7C7B\uFF0C\u800CVector\u548CHashtable\u662F\u7EBF\u7A0B\u5B89\u5168\u7684\u5BB9\u5668\u7C7B\uFF0C\u4F46\u662F\u8FD9\u4E9B\u5BB9\u5668\u5B9E\u73B0\u540C\u6B65\u7684\u65B9\u5F0F\u662F\u901A\u8FC7\u5BF9\u65B9\u6CD5\u52A0\u9501(sychronized)\u65B9\u5F0F\u5B9E\u73B0\u7684\uFF0C\u8FD9\u6837\u8BFB\u5199\u5747\u9700\u8981\u9501\u64CD\u4F5C\uFF0C\u5BFC\u81F4\u6027\u80FD\u4F4E\u4E0B\u3002</p><p>\u800C\u5373\u4F7F\u662FVector\u8FD9\u6837\u7EBF\u7A0B\u5B89\u5168\u7684\u7C7B\uFF0C\u5728\u9762\u5BF9\u591A\u7EBF\u7A0B\u4E0B\u7684\u590D\u5408\u64CD\u4F5C\u7684\u65F6\u5019\u4E5F\u662F\u9700\u8981\u901A\u8FC7\u5BA2\u6237\u7AEF\u52A0\u9501\u7684\u65B9\u5F0F\u4FDD\u8BC1\u539F\u5B50\u6027\u3002\u5982\u4E0B\u9762\u4F8B\u5B50\u8BF4\u660E:</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">TestVector</span> <span class="token punctuation">{</span>
+import{_ as p}from"./plugin-vue_export-helper.21dcd24c.js";import{r as o,o as c,c as l,a as n,b as t,e,d as s}from"./app.615e41d8.js";const i={},u=e(`<h1 id="\u7B80\u5355\u804A\u804Ajava\u7684\u5E76\u53D1\u96C6\u5408\u5BB9\u5668" tabindex="-1"><a class="header-anchor" href="#\u7B80\u5355\u804A\u804Ajava\u7684\u5E76\u53D1\u96C6\u5408\u5BB9\u5668" aria-hidden="true">#</a> \u7B80\u5355\u804A\u804AJava\u7684\u5E76\u53D1\u96C6\u5408\u5BB9\u5668</h1><h2 id="\u540C\u6B65\u5BB9\u5668\u4E0E\u5E76\u53D1\u5BB9\u5668" tabindex="-1"><a class="header-anchor" href="#\u540C\u6B65\u5BB9\u5668\u4E0E\u5E76\u53D1\u5BB9\u5668" aria-hidden="true">#</a> \u540C\u6B65\u5BB9\u5668\u4E0E\u5E76\u53D1\u5BB9\u5668</h2><p>\u6211\u4EEC\u77E5\u9053\u5728java.util\u5305\u4E0B\u63D0\u4F9B\u4E86\u4E00\u4E9B\u5BB9\u5668\u7C7B\uFF0C\u800CVector\u548CHashtable\u662F\u7EBF\u7A0B\u5B89\u5168\u7684\u5BB9\u5668\u7C7B\uFF0C\u4F46\u662F\u8FD9\u4E9B\u5BB9\u5668\u5B9E\u73B0\u540C\u6B65\u7684\u65B9\u5F0F\u662F\u901A\u8FC7\u5BF9\u65B9\u6CD5\u52A0\u9501(sychronized)\u65B9\u5F0F\u5B9E\u73B0\u7684\uFF0C\u8FD9\u6837\u8BFB\u5199\u5747\u9700\u8981\u9501\u64CD\u4F5C\uFF0C\u5BFC\u81F4\u6027\u80FD\u4F4E\u4E0B\u3002</p><p>\u800C\u5373\u4F7F\u662FVector\u8FD9\u6837\u7EBF\u7A0B\u5B89\u5168\u7684\u7C7B\uFF0C\u5728\u9762\u5BF9\u591A\u7EBF\u7A0B\u4E0B\u7684\u590D\u5408\u64CD\u4F5C\u7684\u65F6\u5019\u4E5F\u662F\u9700\u8981\u901A\u8FC7\u5BA2\u6237\u7AEF\u52A0\u9501\u7684\u65B9\u5F0F\u4FDD\u8BC1\u539F\u5B50\u6027\u3002\u5982\u4E0B\u9762\u4F8B\u5B50\u8BF4\u660E:</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">TestVector</span> <span class="token punctuation">{</span>
 	<span class="token keyword">private</span> <span class="token class-name">Vector</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">String</span><span class="token punctuation">&gt;</span></span> vector<span class="token punctuation">;</span>
 
 	<span class="token comment">//\u65B9\u6CD5\u4E00</span>
diff --git a/dist/assets/maven.html.9abc8500.js b/dist/assets/maven.html.d13a0dbf.js
similarity index 99%
rename from dist/assets/maven.html.9abc8500.js
rename to dist/assets/maven.html.d13a0dbf.js
index 539efd4c..36df9440 100644
--- a/dist/assets/maven.html.9abc8500.js
+++ b/dist/assets/maven.html.d13a0dbf.js
@@ -1,4 +1,4 @@
-import{_ as a}from"./plugin-vue_export-helper.21dcd24c.js";import{r,o as s,c as o,a as e,b as i,e as l,d as t}from"./app.a0271b9c.js";const d={},c=l('<h1 id="\u7EC8\u4E8E\u628A\u9879\u76EE\u6784\u5EFA\u795E\u5668maven\u634B\u6E05\u695A\u4E86" tabindex="-1"><a class="header-anchor" href="#\u7EC8\u4E8E\u628A\u9879\u76EE\u6784\u5EFA\u795E\u5668maven\u634B\u6E05\u695A\u4E86" aria-hidden="true">#</a> \u7EC8\u4E8E\u628A\u9879\u76EE\u6784\u5EFA\u795E\u5668Maven\u634B\u6E05\u695A\u4E86~</h1><p>\u4ECA\u5929\u6765\u7ED9\u5927\u5BB6\u4ECB\u7ECD\u4E00\u6B3E\u9879\u76EE\u6784\u5EFA\u795E\u5668\u2014\u2014Maven\uFF0C\u4E0D\u4EC5\u80FD\u5E2E\u6211\u4EEC\u81EA\u52A8\u5316\u6784\u5EFA\uFF0C\u8FD8\u80FD\u591F\u62BD\u8C61\u6784\u5EFA\u8FC7\u7A0B\uFF0C\u63D0\u4F9B\u6784\u5EFA\u4EFB\u52A1\u5B9E\u73B0\uFF1B\u5B83\u8DE8\u5E73\u53F0\uFF0C\u5BF9\u5916\u63D0\u4F9B\u4E86\u4E00\u81F4\u7684\u64CD\u4F5C\u63A5\u53E3\uFF0C\u8FD9\u4E00\u5207\u8DB3\u4EE5\u4F7F\u5B83\u6210\u4E3A\u4F18\u79C0\u7684\u3001\u6D41\u884C\u7684\u6784\u5EFA\u5DE5\u5177\uFF0C\u4ECE\u6B64\u4EE5\u540E\uFF0C\u518D\u4E5F\u4E0D\u7528\u62C5\u5FC3\u9879\u76EE\u641E\u5D29\u4E86\u3002</p><p>\u603B\u7ED3\u4E00\u4E0B Maven \u7684\u4F18\u70B9\uFF0C\u4E3B\u8981\u6709\u4EE5\u4E0B 3 \u70B9\uFF1A</p><ul><li><strong>\u4F9D\u8D56\u7BA1\u7406</strong>\uFF1AMaven \u80FD\u5E2E\u52A9\u6211\u4EEC\u89E3\u51B3\u8F6F\u4EF6\u5305\u4F9D\u8D56\u7684\u7BA1\u7406\u95EE\u9898\uFF0C\u4E0D\u518D\u9700\u8981\u63D0\u4EA4\u5927\u91CF\u7684 jar \u5305\u3001\u5F15\u5165\u7B2C\u4E09\u65B9\u5E93\uFF1B</li><li><strong>\u89C4\u8303\u76EE\u5F55\u7ED3\u6784</strong>\uFF1AMaven \u6807\u51C6\u7684\u76EE\u5F55\u7ED3\u6784\u6709\u52A9\u4E8E\u9879\u76EE\u6784\u5EFA\u7684\u6807\u51C6\u5316\uFF0C\u901A\u8FC7\u914D\u7F6E profile \u8FD8\u53EF\u4EE5\u6839\u636E\u4E0D\u540C\u7684\u73AF\u5883\uFF08\u5F00\u53D1\u73AF\u5883\u3001\u6D4B\u8BD5\u73AF\u5883\uFF0C\u751F\u4EA7\u73AF\u5883\uFF09\u8BFB\u53D6\u4E0D\u540C\u7684\u914D\u7F6E\u6587\u4EF6\uFF1B</li><li><strong>\u65B9\u4FBF\u96C6\u6210</strong>\uFF1A\u80FD\u591F\u96C6\u6210\u5728 IDE \u4E2D\u66F4\u65B9\u4FBF\u4F7F\u7528\u3002</li></ul><h3 id="\u4E00\u3001\u5B89\u88C5-maven" tabindex="-1"><a class="header-anchor" href="#\u4E00\u3001\u5B89\u88C5-maven" aria-hidden="true">#</a> \u4E00\u3001\u5B89\u88C5 Maven</h3><p>\u7531\u4E8E JDK \u662F Maven \u5B89\u88C5\u7684\u524D\u7F6E\u6761\u4EF6\uFF0C\u6240\u4EE5\u8BF7\u4F7F\u7528 <code>java -version</code> \u786E\u8BA4\u662F\u5426\u5DF2\u7ECF\u5B89\u88C5\u4E86 JDK\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/maven/maven-01.png" alt=""></p><p>\u6211\u672C\u4EBA\u4F7F\u7528\u7684\u662F macOS\uFF0C\u6240\u4EE5\u53EF\u4EE5\u6709\u4E24\u79CD\u5B89\u88C5\u65B9\u5F0F\uFF0C<strong>\u4E00\u79CD\u5B98\u7F51\u4E0B\u8F7D\uFF0C\u624B\u52A8\u5B89\u88C5\uFF1B\u4E00\u79CD\u76F4\u63A5\u4F7F\u7528 brew \u4E00\u952E\u5B89\u88C5</strong>\u3002</p><p>\u6211\u4EEC\u5148\u4ECB\u7ECD<em>\u5B98\u7F51\u4E0B\u8F7D\uFF0C\u624B\u52A8\u5B89\u88C5</em>\uFF0C\u8BE5\u65B9\u5F0F\u540C\u6837\u9002\u7528\u4E8E Windows \u7CFB\u7EDF\uFF0C\u5DEE\u522B\u53EF\u53C2\u7167 Maven \u5B98\u7F51\u5B89\u88C5\u6559\u7A0B\uFF1A</p>',9),v={href:"http://maven.apache.org/install.html",target:"_blank",rel:"noopener noreferrer"},p=t("http://maven.apache.org/install.html"),m=e("p",null,[t("1\uFF09"),e("strong",null,"\u4E00\u79CD\u5B98\u7F51\u4E0B\u8F7D\uFF0C\u624B\u52A8\u5B89\u88C5")],-1),g=e("p",null,"\u7B2C\u4E00\u6B65\uFF0C\u53BB\u5B98\u7F51\u4E0B\u8F7D Maven \u5B89\u88C5\u5305\uFF1A",-1),u=t("\u5B98\u7F51\u5730\u5740\uFF1A"),b={href:"http://maven.apache.org/download.cgi",target:"_blank",rel:"noopener noreferrer"},h=t("http://maven.apache.org/download.cgi"),_=l('<p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/maven/maven-02.png" alt=""></p><p>\u5F88\u591A\u521D\u5B66\u8005\u5728\u5B98\u7F51\u4E0B\u8F7D\u7684\u65F6\u5019\u4E0D\u77E5\u9053\u9009\u54EA\u4E00\u4E2A\uFF0C\u8FD9\u91CC\u505A\u4E00\u4E0B\u7B80\u5355\u7684\u4ECB\u7ECD\u3002</p><ul><li>bin\uFF08binary\uFF09\u4EE3\u8868\u7531 Java \u6E90\u6587\u4EF6\u7F16\u8BD1\u540E\u7684\u4E8C\u8FDB\u5236 class \u6587\u4EF6\uFF0Csrc\uFF08source\uFF09\u4EE3\u8868Java \u6E90\u6587\u4EF6\u3002</li><li>\u4E00\u822C\u60C5\u51B5\u4E0B\uFF0C\u9009\u62E9 bin \u6587\u4EF6\u8FDB\u884C\u5B89\u88C5\u5C31 OK \u4E86\uFF1B\u5982\u679C\u4F60\u60F3\u81EA\u5DF1\u7F16\u8BD1\uFF0C\u53EF\u9009 src \u7248\u672C\u3002</li><li>tar.gz \u538B\u7F29\u683C\u5F0F\u9002\u7528\u4E8E Unix \u64CD\u4F5C\u7CFB\u7EDF\uFF0Czip \u9002\u7528\u4E8E Windows \u64CD\u4F5C\u7CFB\u7EDF\uFF1B\u4F46\u4E0D\u662F\u7EDD\u5BF9\u7684\u3002</li></ul><p>\u7B2C\u4E8C\u6B65\uFF0C\u89E3\u538B\u4E0B\u8F7D\u7684\u5B89\u88C5\u5305\uFF0C\u590D\u5236\u8BE5\u8DEF\u5F84\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/maven/maven-03.png" alt=""></p><ul><li>bin \u76EE\u5F55\uFF1A\u8BE5\u5305\u542B\u4E86 Maven \u8FD0\u884C\u7684\u6240\u6709\u811A\u672C\uFF0C\u7528\u6765\u914D\u7F6E Java \u547D\u4EE4\uFF0C\u51C6\u5907\u6267\u884C\u73AF\u5883\uFF0C\u7136\u540E\u6267\u884C Java \u547D\u4EE4\u3002</li><li>boot \u76EE\u5F55\uFF1A\u8BE5\u76EE\u5F55\u53EA\u5305\u542B\u4E86\u4E00\u4E2A plexus-classworlds-xxx-jar \u6587\u4EF6\uFF0C\u8BE5\u6587\u4EF6\u662F\u4E00\u4E2A\u7C7B\u52A0\u8F7D\u5668\u6846\u67B6\uFF0C\u76F8\u5F53\u4E8E\u9ED8\u8BA4\u7684 Java \u7C7B\u52A0\u8F7D\u5668\uFF0C\u63D0\u4F9B\u4E86\u66F4\u52A0\u4E30\u5BCC\u7684\u8BED\u6CD5\u4EE5\u4FBF\u914D\u7F6E\uFF0CMaven \u4F7F\u7528\u8BE5\u52A0\u8F7D\u5668\u52A0\u8F7D\u81EA\u5DF1\u7684\u7C7B\u5E93\u3002</li><li><strong>conf \u76EE\u5F55</strong>\uFF1A\u8BE5\u76EE\u5F55\u5305\u542B\u4E86\u4E00\u4E2A\u975E\u5E38\u91CD\u8981\u7684\u6587\u4EF6 settings.xml\u3002\u53EF\u4EE5\u76F4\u63A5\u4FEE\u6539\u8BE5\u6587\u4EF6\uFF0C\u7528\u6765\u5168\u5C40\u5B9A\u5236 Maven \u7684\u884C\u4E3A\uFF1B\u4E5F\u53EF\u4EE5\u590D\u5236\u8BE5\u6587\u4EF6\u5230 <code>~/.m2/</code> \u76EE\u5F55\u4E0B\uFF08~\u8868\u793A\u7528\u6237\u76EE\u5F55\uFF09\uFF0C\u4FEE\u6539\u8BE5\u6587\u4EF6\u53EF\u4EE5\u5728\u7528\u6237\u8303\u56F4\u5185\u5B9A\u5236 Maven \u7684\u884C\u4E3A\u3002</li><li>lib \u76EE\u5F55\uFF1A\u8BE5\u76EE\u5F55\u5305\u542B\u4E86Maven\u8FD0\u884C\u65F6\u6240\u9700\u8981\u7684 Java \u7C7B\u5E93\uFF0C\u5305\u62ECMaven \u4F9D\u8D56\u7684\u7B2C\u4E09\u65B9\u7C7B\u5E93\uFF0C\u6BD4\u5982 slf4j-api.jar\u3002</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/maven/maven-04.png" alt=""></p><p>\u7B2C\u4E09\u6B65\uFF0C\u914D\u7F6E\u73AF\u5883\u53D8\u91CF</p><p>\u6253\u5F00\u7EC8\u7AEF\uFF0C\u8F93\u5165 <code>vim ~/.bash_profile</code> \u547D\u4EE4\u6253\u5F00 bash_profile \u6587\u4EF6\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/maven/maven-05.png" alt=""></p><p>bash_profile \u6587\u4EF6\u7528\u4E8E\u914D\u7F6E\u73AF\u5883\u53D8\u91CF\u548C\u542F\u52A8\u7A0B\u5E8F\uFF0C\u8BE6\u7EC6\u4ECB\u7ECD\u53EF\u53C2\u7167\uFF1A</p>',11),x={href:"https://www.cnblogs.com/kevingrace/p/8072860.html",target:"_blank",rel:"noopener noreferrer"},M=t("https://www.cnblogs.com/kevingrace/p/8072860.html"),f=l(`<p>\u5728\u6587\u4EF6\u4E2D\u6DFB\u52A0\u8BBE\u7F6E\u73AF\u5883\u53D8\u91CF\u7684\u547D\u4EE4\uFF1A</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>export M2_HOME=/Users/maweiqing/cmower/save/apache-maven-3.8.3
+import{_ as a}from"./plugin-vue_export-helper.21dcd24c.js";import{r,o as s,c as o,a as e,b as i,e as l,d as t}from"./app.615e41d8.js";const d={},c=l('<h1 id="\u7EC8\u4E8E\u628A\u9879\u76EE\u6784\u5EFA\u795E\u5668maven\u634B\u6E05\u695A\u4E86" tabindex="-1"><a class="header-anchor" href="#\u7EC8\u4E8E\u628A\u9879\u76EE\u6784\u5EFA\u795E\u5668maven\u634B\u6E05\u695A\u4E86" aria-hidden="true">#</a> \u7EC8\u4E8E\u628A\u9879\u76EE\u6784\u5EFA\u795E\u5668Maven\u634B\u6E05\u695A\u4E86~</h1><p>\u4ECA\u5929\u6765\u7ED9\u5927\u5BB6\u4ECB\u7ECD\u4E00\u6B3E\u9879\u76EE\u6784\u5EFA\u795E\u5668\u2014\u2014Maven\uFF0C\u4E0D\u4EC5\u80FD\u5E2E\u6211\u4EEC\u81EA\u52A8\u5316\u6784\u5EFA\uFF0C\u8FD8\u80FD\u591F\u62BD\u8C61\u6784\u5EFA\u8FC7\u7A0B\uFF0C\u63D0\u4F9B\u6784\u5EFA\u4EFB\u52A1\u5B9E\u73B0\uFF1B\u5B83\u8DE8\u5E73\u53F0\uFF0C\u5BF9\u5916\u63D0\u4F9B\u4E86\u4E00\u81F4\u7684\u64CD\u4F5C\u63A5\u53E3\uFF0C\u8FD9\u4E00\u5207\u8DB3\u4EE5\u4F7F\u5B83\u6210\u4E3A\u4F18\u79C0\u7684\u3001\u6D41\u884C\u7684\u6784\u5EFA\u5DE5\u5177\uFF0C\u4ECE\u6B64\u4EE5\u540E\uFF0C\u518D\u4E5F\u4E0D\u7528\u62C5\u5FC3\u9879\u76EE\u641E\u5D29\u4E86\u3002</p><p>\u603B\u7ED3\u4E00\u4E0B Maven \u7684\u4F18\u70B9\uFF0C\u4E3B\u8981\u6709\u4EE5\u4E0B 3 \u70B9\uFF1A</p><ul><li><strong>\u4F9D\u8D56\u7BA1\u7406</strong>\uFF1AMaven \u80FD\u5E2E\u52A9\u6211\u4EEC\u89E3\u51B3\u8F6F\u4EF6\u5305\u4F9D\u8D56\u7684\u7BA1\u7406\u95EE\u9898\uFF0C\u4E0D\u518D\u9700\u8981\u63D0\u4EA4\u5927\u91CF\u7684 jar \u5305\u3001\u5F15\u5165\u7B2C\u4E09\u65B9\u5E93\uFF1B</li><li><strong>\u89C4\u8303\u76EE\u5F55\u7ED3\u6784</strong>\uFF1AMaven \u6807\u51C6\u7684\u76EE\u5F55\u7ED3\u6784\u6709\u52A9\u4E8E\u9879\u76EE\u6784\u5EFA\u7684\u6807\u51C6\u5316\uFF0C\u901A\u8FC7\u914D\u7F6E profile \u8FD8\u53EF\u4EE5\u6839\u636E\u4E0D\u540C\u7684\u73AF\u5883\uFF08\u5F00\u53D1\u73AF\u5883\u3001\u6D4B\u8BD5\u73AF\u5883\uFF0C\u751F\u4EA7\u73AF\u5883\uFF09\u8BFB\u53D6\u4E0D\u540C\u7684\u914D\u7F6E\u6587\u4EF6\uFF1B</li><li><strong>\u65B9\u4FBF\u96C6\u6210</strong>\uFF1A\u80FD\u591F\u96C6\u6210\u5728 IDE \u4E2D\u66F4\u65B9\u4FBF\u4F7F\u7528\u3002</li></ul><h3 id="\u4E00\u3001\u5B89\u88C5-maven" tabindex="-1"><a class="header-anchor" href="#\u4E00\u3001\u5B89\u88C5-maven" aria-hidden="true">#</a> \u4E00\u3001\u5B89\u88C5 Maven</h3><p>\u7531\u4E8E JDK \u662F Maven \u5B89\u88C5\u7684\u524D\u7F6E\u6761\u4EF6\uFF0C\u6240\u4EE5\u8BF7\u4F7F\u7528 <code>java -version</code> \u786E\u8BA4\u662F\u5426\u5DF2\u7ECF\u5B89\u88C5\u4E86 JDK\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/maven/maven-01.png" alt=""></p><p>\u6211\u672C\u4EBA\u4F7F\u7528\u7684\u662F macOS\uFF0C\u6240\u4EE5\u53EF\u4EE5\u6709\u4E24\u79CD\u5B89\u88C5\u65B9\u5F0F\uFF0C<strong>\u4E00\u79CD\u5B98\u7F51\u4E0B\u8F7D\uFF0C\u624B\u52A8\u5B89\u88C5\uFF1B\u4E00\u79CD\u76F4\u63A5\u4F7F\u7528 brew \u4E00\u952E\u5B89\u88C5</strong>\u3002</p><p>\u6211\u4EEC\u5148\u4ECB\u7ECD<em>\u5B98\u7F51\u4E0B\u8F7D\uFF0C\u624B\u52A8\u5B89\u88C5</em>\uFF0C\u8BE5\u65B9\u5F0F\u540C\u6837\u9002\u7528\u4E8E Windows \u7CFB\u7EDF\uFF0C\u5DEE\u522B\u53EF\u53C2\u7167 Maven \u5B98\u7F51\u5B89\u88C5\u6559\u7A0B\uFF1A</p>',9),v={href:"http://maven.apache.org/install.html",target:"_blank",rel:"noopener noreferrer"},p=t("http://maven.apache.org/install.html"),m=e("p",null,[t("1\uFF09"),e("strong",null,"\u4E00\u79CD\u5B98\u7F51\u4E0B\u8F7D\uFF0C\u624B\u52A8\u5B89\u88C5")],-1),g=e("p",null,"\u7B2C\u4E00\u6B65\uFF0C\u53BB\u5B98\u7F51\u4E0B\u8F7D Maven \u5B89\u88C5\u5305\uFF1A",-1),u=t("\u5B98\u7F51\u5730\u5740\uFF1A"),b={href:"http://maven.apache.org/download.cgi",target:"_blank",rel:"noopener noreferrer"},h=t("http://maven.apache.org/download.cgi"),_=l('<p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/maven/maven-02.png" alt=""></p><p>\u5F88\u591A\u521D\u5B66\u8005\u5728\u5B98\u7F51\u4E0B\u8F7D\u7684\u65F6\u5019\u4E0D\u77E5\u9053\u9009\u54EA\u4E00\u4E2A\uFF0C\u8FD9\u91CC\u505A\u4E00\u4E0B\u7B80\u5355\u7684\u4ECB\u7ECD\u3002</p><ul><li>bin\uFF08binary\uFF09\u4EE3\u8868\u7531 Java \u6E90\u6587\u4EF6\u7F16\u8BD1\u540E\u7684\u4E8C\u8FDB\u5236 class \u6587\u4EF6\uFF0Csrc\uFF08source\uFF09\u4EE3\u8868Java \u6E90\u6587\u4EF6\u3002</li><li>\u4E00\u822C\u60C5\u51B5\u4E0B\uFF0C\u9009\u62E9 bin \u6587\u4EF6\u8FDB\u884C\u5B89\u88C5\u5C31 OK \u4E86\uFF1B\u5982\u679C\u4F60\u60F3\u81EA\u5DF1\u7F16\u8BD1\uFF0C\u53EF\u9009 src \u7248\u672C\u3002</li><li>tar.gz \u538B\u7F29\u683C\u5F0F\u9002\u7528\u4E8E Unix \u64CD\u4F5C\u7CFB\u7EDF\uFF0Czip \u9002\u7528\u4E8E Windows \u64CD\u4F5C\u7CFB\u7EDF\uFF1B\u4F46\u4E0D\u662F\u7EDD\u5BF9\u7684\u3002</li></ul><p>\u7B2C\u4E8C\u6B65\uFF0C\u89E3\u538B\u4E0B\u8F7D\u7684\u5B89\u88C5\u5305\uFF0C\u590D\u5236\u8BE5\u8DEF\u5F84\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/maven/maven-03.png" alt=""></p><ul><li>bin \u76EE\u5F55\uFF1A\u8BE5\u5305\u542B\u4E86 Maven \u8FD0\u884C\u7684\u6240\u6709\u811A\u672C\uFF0C\u7528\u6765\u914D\u7F6E Java \u547D\u4EE4\uFF0C\u51C6\u5907\u6267\u884C\u73AF\u5883\uFF0C\u7136\u540E\u6267\u884C Java \u547D\u4EE4\u3002</li><li>boot \u76EE\u5F55\uFF1A\u8BE5\u76EE\u5F55\u53EA\u5305\u542B\u4E86\u4E00\u4E2A plexus-classworlds-xxx-jar \u6587\u4EF6\uFF0C\u8BE5\u6587\u4EF6\u662F\u4E00\u4E2A\u7C7B\u52A0\u8F7D\u5668\u6846\u67B6\uFF0C\u76F8\u5F53\u4E8E\u9ED8\u8BA4\u7684 Java \u7C7B\u52A0\u8F7D\u5668\uFF0C\u63D0\u4F9B\u4E86\u66F4\u52A0\u4E30\u5BCC\u7684\u8BED\u6CD5\u4EE5\u4FBF\u914D\u7F6E\uFF0CMaven \u4F7F\u7528\u8BE5\u52A0\u8F7D\u5668\u52A0\u8F7D\u81EA\u5DF1\u7684\u7C7B\u5E93\u3002</li><li><strong>conf \u76EE\u5F55</strong>\uFF1A\u8BE5\u76EE\u5F55\u5305\u542B\u4E86\u4E00\u4E2A\u975E\u5E38\u91CD\u8981\u7684\u6587\u4EF6 settings.xml\u3002\u53EF\u4EE5\u76F4\u63A5\u4FEE\u6539\u8BE5\u6587\u4EF6\uFF0C\u7528\u6765\u5168\u5C40\u5B9A\u5236 Maven \u7684\u884C\u4E3A\uFF1B\u4E5F\u53EF\u4EE5\u590D\u5236\u8BE5\u6587\u4EF6\u5230 <code>~/.m2/</code> \u76EE\u5F55\u4E0B\uFF08~\u8868\u793A\u7528\u6237\u76EE\u5F55\uFF09\uFF0C\u4FEE\u6539\u8BE5\u6587\u4EF6\u53EF\u4EE5\u5728\u7528\u6237\u8303\u56F4\u5185\u5B9A\u5236 Maven \u7684\u884C\u4E3A\u3002</li><li>lib \u76EE\u5F55\uFF1A\u8BE5\u76EE\u5F55\u5305\u542B\u4E86Maven\u8FD0\u884C\u65F6\u6240\u9700\u8981\u7684 Java \u7C7B\u5E93\uFF0C\u5305\u62ECMaven \u4F9D\u8D56\u7684\u7B2C\u4E09\u65B9\u7C7B\u5E93\uFF0C\u6BD4\u5982 slf4j-api.jar\u3002</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/maven/maven-04.png" alt=""></p><p>\u7B2C\u4E09\u6B65\uFF0C\u914D\u7F6E\u73AF\u5883\u53D8\u91CF</p><p>\u6253\u5F00\u7EC8\u7AEF\uFF0C\u8F93\u5165 <code>vim ~/.bash_profile</code> \u547D\u4EE4\u6253\u5F00 bash_profile \u6587\u4EF6\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/maven/maven-05.png" alt=""></p><p>bash_profile \u6587\u4EF6\u7528\u4E8E\u914D\u7F6E\u73AF\u5883\u53D8\u91CF\u548C\u542F\u52A8\u7A0B\u5E8F\uFF0C\u8BE6\u7EC6\u4ECB\u7ECD\u53EF\u53C2\u7167\uFF1A</p>',11),x={href:"https://www.cnblogs.com/kevingrace/p/8072860.html",target:"_blank",rel:"noopener noreferrer"},M=t("https://www.cnblogs.com/kevingrace/p/8072860.html"),f=l(`<p>\u5728\u6587\u4EF6\u4E2D\u6DFB\u52A0\u8BBE\u7F6E\u73AF\u5883\u53D8\u91CF\u7684\u547D\u4EE4\uFF1A</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>export M2_HOME=/Users/maweiqing/cmower/save/apache-maven-3.8.3
 export PATH=\${PATH}:\${M2_HOME}/bin
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/maven/maven-06.png" alt=""></p><p>\u4FDD\u5B58\u540E\u9000\u51FA\uFF0C\u53EF\u4EE5\u6267\u884C <code>source ~/.bash_profile</code> \u4F7F\u914D\u7F6E\u751F\u6548\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/maven/maven-07.png" alt=""></p><p>\u7B2C\u56DB\u6B65\uFF0C\u67E5\u770B\u914D\u7F6E\u662F\u5426\u751F\u6548</p><p>\u8F93\u5165 <code>mvn -v</code> \u547D\u4EE4\uFF0C\u5982\u679C\u8F93\u51FA\u4EE5\u4E0B\u5185\u5BB9\uFF0C\u8868\u793A\u914D\u7F6E\u6210\u529F\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/maven/maven-08.png" alt=""></p><p>\u5982\u672A\u751F\u6548\uFF0C\u53EF\u518D\u5F00\u4E00\u4E2A\u7EC8\u7AEF\u7A97\u53E3\u5C1D\u8BD5 <code>mvn -v</code> \u547D\u4EE4\u3002</p><p><strong>2\uFF09brew \u4E00\u952E\u5B89\u88C5</strong></p><p>\u7B2C\u4E00\u6B65\uFF0C\u4F7F\u7528 <code>brew install maven</code> \u547D\u4EE4\u4E00\u952E\u5B89\u88C5\uFF0C\u5E76\u81EA\u52A8\u914D\u7F6E\u73AF\u5883\u53D8\u91CF</p><p>\u7B2C\u4E8C\u6B65\uFF0C\u4F7F\u7528 <code>mvn -v</code> \u547D\u4EE4\u67E5\u770B\u7248\u672C</p><h3 id="\u4E8C\u3001maven-\u914D\u7F6E\u6587\u4EF6\u5927\u76D8\u70B9" tabindex="-1"><a class="header-anchor" href="#\u4E8C\u3001maven-\u914D\u7F6E\u6587\u4EF6\u5927\u76D8\u70B9" aria-hidden="true">#</a> \u4E8C\u3001Maven \u914D\u7F6E\u6587\u4EF6\u5927\u76D8\u70B9</h3><p>Maven \u662F\u57FA\u4E8E POM\uFF08Project Object Model\uFF09 \u8FDB\u884C\u7684\uFF0C\u9879\u76EE\u7684\u6240\u6709\u914D\u7F6E\u90FD\u4F1A\u653E\u5728 pom.xml \u6587\u4EF6\u4E2D\uFF0C\u5305\u62EC\u9879\u76EE\u7684\u7C7B\u578B\u3001\u540D\u5B57\uFF0C\u4F9D\u8D56\u5173\u7CFB\uFF0C\u63D2\u4EF6\u5B9A\u5236\u7B49\u7B49\u3002</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;?xml version=&quot;1.0&quot; encoding=&quot;UTF-8&quot;?&gt;
 &lt;project xmlns=&quot;http://maven.apache.org/POM/4.0.0&quot; xmlns:xsi=&quot;http://www.w3.org/2001/XMLSchema-instance&quot;
diff --git a/dist/assets/meituan-9-gc.html.26985c28.js b/dist/assets/meituan-9-gc.html.7173ffd4.js
similarity index 99%
rename from dist/assets/meituan-9-gc.html.26985c28.js
rename to dist/assets/meituan-9-gc.html.7173ffd4.js
index 610b725e..a54c2220 100644
--- a/dist/assets/meituan-9-gc.html.26985c28.js
+++ b/dist/assets/meituan-9-gc.html.7173ffd4.js
@@ -1,4 +1,4 @@
-import{_ as a}from"./plugin-vue_export-helper.21dcd24c.js";import{r,o as t,c as d,a as e,b as s,e as l,d as i}from"./app.a0271b9c.js";const c={},o=l('<h1 id="java\u4E2D9\u79CD\u5E38\u89C1\u7684cms-gc\u95EE\u9898\u5206\u6790\u4E0E\u89E3\u51B3" tabindex="-1"><a class="header-anchor" href="#java\u4E2D9\u79CD\u5E38\u89C1\u7684cms-gc\u95EE\u9898\u5206\u6790\u4E0E\u89E3\u51B3" aria-hidden="true">#</a> Java\u4E2D9\u79CD\u5E38\u89C1\u7684CMS GC\u95EE\u9898\u5206\u6790\u4E0E\u89E3\u51B3</h1><p><strong>1.1 \u5F15\u8A00</strong></p><p>\u81EA Sun \u53D1\u5E03 Java \u8BED\u8A00\u4EE5\u6765\uFF0C\u5F00\u59CB\u4F7F\u7528 GC \u6280\u672F\u6765\u8FDB\u884C\u5185\u5B58\u81EA\u52A8\u7BA1\u7406\uFF0C\u907F\u514D\u4E86\u624B\u52A8\u7BA1\u7406\u5E26\u6765\u7684\u60AC\u6302\u6307\u9488\uFF08Dangling Pointer\uFF09\u95EE\u9898\uFF0C\u5F88\u5927\u7A0B\u5EA6\u4E0A\u63D0\u5347\u4E86\u5F00\u53D1\u6548\u7387\uFF0C\u4ECE\u6B64 GC \u6280\u672F\u4E5F\u4E00\u4E3E\u6210\u540D\u3002GC \u6709\u7740\u975E\u5E38\u60A0\u4E45\u7684\u5386\u53F2\uFF0C1960 \u5E74\u6709\u7740\u201CLisp \u4E4B\u7236\u201D\u548C\u201C\u4EBA\u5DE5\u667A\u80FD\u4E4B\u7236\u201D\u4E4B\u79F0\u7684 John McCarthy \u5C31\u5728\u8BBA\u6587\u4E2D\u53D1\u5E03\u4E86 GC \u7B97\u6CD5\uFF0C60 \u5E74\u4EE5\u6765\uFF0C GC \u6280\u672F\u7684\u53D1\u5C55\u4E5F\u7A81\u98DE\u731B\u8FDB\uFF0C\u4F46\u4E0D\u7BA1\u662F\u591A\u4E48\u524D\u6CBF\u7684\u6536\u96C6\u5668\u4E5F\u90FD\u662F\u57FA\u4E8E\u4E09\u79CD\u57FA\u672C\u7B97\u6CD5\u7684\u7EC4\u5408\u6216\u5E94\u7528\uFF0C\u4E5F\u5C31\u662F\u8BF4 GC \u8981\u89E3\u51B3\u7684\u6839\u672C\u95EE\u9898\u8FD9\u4E48\u591A\u5E74\u4E00\u76F4\u90FD\u6CA1\u6709\u53D8\u8FC7\u3002\u7B14\u8005\u8BA4\u4E3A\uFF0C\u5728\u4E0D\u592A\u8FDC\u7684\u5C06\u6765\uFF0C GC \u6280\u672F\u4F9D\u7136\u4E0D\u4F1A\u8FC7\u65F6\uFF0C\u6BD4\u8D77\u65E5\u65B0\u6708\u5F02\u7684\u65B0\u6280\u672F\uFF0CGC \u8FD9\u95E8\u53E4\u5178\u6280\u672F\u66F4\u503C\u5F97\u6211\u4EEC\u5B66\u4E60\u3002</p><p>\u90A3\u4E48\uFF0CGC \u95EE\u9898\u5904\u7406\u80FD\u529B\u80FD\u4E0D\u80FD\u7CFB\u7EDF\u6027\u638C\u63E1\uFF1F\u4E00\u4E9B\u5F71\u54CD\u56E0\u7D20\u90FD\u662F<strong>\u4E92\u4E3A\u56E0\u679C</strong>\u7684\u95EE\u9898\u8BE5\u600E\u4E48\u5206\u6790\uFF1F\u6BD4\u5982\u4E00\u4E2A\u670D\u52A1 RT \u7A81\u7136\u4E0A\u6DA8\uFF0C\u6709 GC \u8017\u65F6\u589E\u5927\u3001\u7EBF\u7A0B Block \u589E\u591A\u3001\u6162\u67E5\u8BE2\u589E\u591A\u3001CPU \u8D1F\u8F7D\u9AD8\u56DB\u4E2A\u8868\u8C61\uFF0C\u5230\u5E95\u54EA\u4E2A\u662F\u8BF1\u56E0\uFF1F\u5982\u4F55\u5224\u65AD GC \u6709\u6CA1\u6709\u95EE\u9898\uFF1F\u4F7F\u7528 CMS \u6709\u54EA\u4E9B\u5E38\u89C1\u95EE\u9898\uFF1F\u5982\u4F55\u5224\u65AD\u6839\u56E0\u662F\u4EC0\u4E48\uFF1F\u5982\u4F55\u89E3\u51B3\u6216\u907F\u514D\u8FD9\u4E9B\u95EE\u9898\uFF1F\u9605\u8BFB\u5B8C\u672C\u6587\uFF0C\u76F8\u4FE1\u4F60\u5C06\u4F1A\u5BF9 CMS GC \u7684\u95EE\u9898\u5904\u7406\u6709\u4E00\u4E2A\u7CFB\u7EDF\u6027\u7684\u8BA4\u77E5\uFF0C\u66F4\u80FD\u6E38\u5203\u6709\u4F59\u5730\u89E3\u51B3\u8FD9\u4E9B\u95EE\u9898\uFF0C\u4E0B\u9762\u5C31\u8BA9\u6211\u4EEC\u5F00\u59CB\u5427\uFF01\u6587\u4E2D\u82E5\u6709\u9519\u8BEF\u4E4B\u5904\uFF0C\u8FD8\u8BF7\u5927\u5BB6\u4E0D\u541D\u6307\u6B63\u3002</p><p><strong>1.2 \u6982\u89C8</strong></p><p>\u60F3\u8981\u7CFB\u7EDF\u6027\u5730\u638C\u63E1 GC \u95EE\u9898\u5904\u7406\uFF0C\u7B14\u8005\u8FD9\u91CC\u7ED9\u51FA\u4E00\u4E2A\u5B66\u4E60\u8DEF\u5F84\uFF0C\u6574\u4F53\u6587\u7AE0\u7684\u6846\u67B6\u4E5F\u662F\u6309\u7167\u8FD9\u4E2A\u7ED3\u6784\u5C55\u5F00\uFF0C\u4E3B\u8981\u5206\u56DB\u5927\u6B65\u3002</p><p><img src="https://upload-images.jianshu.io/upload_images/1179389-22ed8367a864013b?imageMogr2/auto-orient/strip|imageView2/2/w/1240" alt=""></p><ul><li><p>**\u5EFA\u7ACB\u77E5\u8BC6\u4F53\u7CFB\uFF1A**\u4ECE JVM \u7684\u5185\u5B58\u7ED3\u6784\u5230\u5783\u573E\u6536\u96C6\u7684\u7B97\u6CD5\u548C\u6536\u96C6\u5668\uFF0C\u5B66\u4E60 GC \u7684\u57FA\u7840\u77E5\u8BC6\uFF0C\u638C\u63E1\u4E00\u4E9B\u5E38\u7528\u7684 GC \u95EE\u9898\u5206\u6790\u5DE5\u5177\u3002</p></li><li><p>**\u786E\u5B9A\u8BC4\u4EF7\u6307\u6807\uFF1A**\u4E86\u89E3\u57FA\u672C GC \u7684\u8BC4\u4EF7\u65B9\u6CD5\uFF0C\u6478\u6E05\u5982\u4F55\u8BBE\u5B9A\u72EC\u7ACB\u7CFB\u7EDF\u7684\u6307\u6807\uFF0C\u4EE5\u53CA\u5728\u4E1A\u52A1\u573A\u666F\u4E2D\u5224\u65AD GC \u662F\u5426\u5B58\u5728\u95EE\u9898\u7684\u624B\u6BB5\u3002</p></li><li><p>**\u573A\u666F\u8C03\u4F18\u5B9E\u8DF5\uFF1A**\u8FD0\u7528\u638C\u63E1\u7684\u77E5\u8BC6\u548C\u7CFB\u7EDF\u8BC4\u4EF7\u6307\u6807\uFF0C\u5206\u6790\u4E0E\u89E3\u51B3\u4E5D\u79CD CMS \u4E2D\u5E38\u89C1 GC \u95EE\u9898\u573A\u666F\u3002</p></li><li><p>**\u603B\u7ED3\u4F18\u5316\u7ECF\u9A8C\uFF1A**\u5BF9\u6574\u4F53\u8FC7\u7A0B\u505A\u603B\u7ED3\u5E76\u63D0\u51FA\u7B14\u8005\u7684\u51E0\u70B9\u5EFA\u8BAE\uFF0C\u540C\u65F6\u5C06\u603B\u7ED3\u5230\u7684\u7ECF\u9A8C\u5B8C\u5584\u5230\u77E5\u8BC6\u4F53\u7CFB\u4E4B\u4E2D\u3002</p></li></ul><p><strong>2. GC \u57FA\u7840</strong></p><p>\u5728\u6B63\u5F0F\u5F00\u59CB\u524D\uFF0C\u5148\u505A\u4E9B\u7B80\u8981\u94FA\u57AB\uFF0C\u4ECB\u7ECD\u4E0B JVM \u5185\u5B58\u5212\u5206\u3001\u6536\u96C6\u7B97\u6CD5\u3001\u6536\u96C6\u5668\u7B49\u5E38\u7528\u6982\u5FF5\u4ECB\u7ECD\uFF0C\u57FA\u7840\u6BD4\u8F83\u597D\u7684\u540C\u5B66\u53EF\u4EE5\u76F4\u63A5\u8DF3\u8FC7\u8FD9\u90E8\u5206\u3002</p><p><strong>2.1 \u57FA\u7840\u6982\u5FF5</strong></p>',11),u=l("<li><p>**GC\uFF1A**GC \u672C\u8EAB\u6709\u4E09\u79CD\u8BED\u4E49\uFF0C\u4E0B\u6587\u9700\u8981\u6839\u636E\u5177\u4F53\u573A\u666F\u5E26\u5165\u4E0D\u540C\u7684\u8BED\u4E49\uFF1A</p></li><li><p><strong>Garbage Collection</strong>\uFF1A\u5783\u573E\u6536\u96C6\u6280\u672F\uFF0C\u540D\u8BCD\u3002</p></li><li><p><strong>Garbage Collector</strong>\uFF1A\u5783\u573E\u6536\u96C6\u5668\uFF0C\u540D\u8BCD\u3002</p></li><li><p><strong>Garbage Collecting</strong>\uFF1A\u5783\u573E\u6536\u96C6\u52A8\u4F5C\uFF0C\u52A8\u8BCD\u3002</p></li><li><p>**Mutator\uFF1A**\u751F\u4EA7\u5783\u573E\u7684\u89D2\u8272\uFF0C\u4E5F\u5C31\u662F\u6211\u4EEC\u7684\u5E94\u7528\u7A0B\u5E8F\uFF0C\u5783\u573E\u5236\u9020\u8005\uFF0C\u901A\u8FC7 Allocator \u8FDB\u884C allocate \u548C free\u3002</p></li><li><p>**TLAB\uFF1A**Thread Local Allocation Buffer \u7684\u7B80\u5199\uFF0C\u57FA\u4E8E CAS \u7684\u72EC\u4EAB\u7EBF\u7A0B\uFF08Mutator Threads\uFF09\u53EF\u4EE5\u4F18\u5148\u5C06\u5BF9\u8C61\u5206\u914D\u5728 Eden \u4E2D\u7684\u4E00\u5757\u5185\u5B58\uFF0C\u56E0\u4E3A\u662F Java \u7EBF\u7A0B\u72EC\u4EAB\u7684\u5185\u5B58\u533A\u6CA1\u6709\u9501\u7ADE\u4E89\uFF0C\u6240\u4EE5\u5206\u914D\u901F\u5EA6\u66F4\u5FEB\uFF0C\u6BCF\u4E2A TLAB \u90FD\u662F\u4E00\u4E2A\u7EBF\u7A0B\u72EC\u4EAB\u7684\u3002</p></li>",6),v=i("**Card Table\uFF1A**\u4E2D\u6587\u7FFB\u8BD1\u4E3A\u5361\u8868\uFF0C\u4E3B\u8981\u662F\u7528\u6765\u6807\u8BB0\u5361\u9875\u7684\u72B6\u6001\uFF0C\u6BCF\u4E2A\u5361\u8868\u9879\u5BF9\u5E94\u4E00\u4E2A\u5361\u9875\u3002\u5F53\u5361\u9875\u4E2D\u4E00\u4E2A\u5BF9\u8C61\u5F15\u7528\u6709\u5199\u64CD\u4F5C\u65F6\uFF0C\u5199\u5C4F\u969C\u5C06\u4F1A\u6807\u8BB0\u5BF9\u8C61\u6240\u5728\u7684\u5361\u8868\u72B6\u6001\u6539\u4E3A dirty\uFF0C\u5361\u8868\u7684\u672C\u8D28\u662F\u7528\u6765\u89E3\u51B3\u8DE8\u4EE3\u5F15\u7528\u7684\u95EE\u9898\u3002\u5177\u4F53\u600E\u4E48\u89E3\u51B3\u7684\u53EF\u4EE5\u53C2\u8003 StackOverflow \u4E0A\u7684\u8FD9\u4E2A\u95EE\u9898\xA0"),m={href:"https://stackoverflow.com/questions/19154607/how-actually-card-table-and-writer-barrier-works",target:"_blank",rel:"noopener noreferrer"},p=i("how-actually-card-table-and-writer-barrier-works"),b=i("\uFF0C\u6216\u8005\u7814\u8BFB\u4E00\u4E0B cardTableRS.app \u4E2D\u7684\u6E90\u7801\u3002"),g=l('<p><strong>2.2 JVM \u5185\u5B58\u5212\u5206</strong></p><p>\u4ECE JCP\uFF08Java Community Process\uFF09\u7684\u5B98\u7F51\u4E2D\u53EF\u4EE5\u770B\u5230\uFF0C\u76EE\u524D Java \u7248\u672C\u6700\u65B0\u5DF2\u7ECF\u5230\u4E86 Java 16\uFF0C\u672A\u6765\u7684 Java 17 \u4EE5\u53CA\u73B0\u5728\u7684 Java 11 \u548C Java 8 \u662F LTS \u7248\u672C\uFF0CJVM \u89C4\u8303\u4E5F\u5728\u968F\u7740\u8FED\u4EE3\u5728\u53D8\u66F4\uFF0C\u7531\u4E8E\u672C\u6587\u4E3B\u8981\u8BA8\u8BBA CMS\uFF0C\u6B64\u5904\u8FD8\u662F\u653E Java 8 \u7684\u5185\u5B58\u7ED3\u6784\u3002</p><p><img src="https://upload-images.jianshu.io/upload_images/1179389-5379d37a996aabf9?imageMogr2/auto-orient/strip|imageView2/2/w/1240" alt=""></p><p>GC \u4E3B\u8981\u5DE5\u4F5C\u5728 Heap \u533A\u548C MetaSpace \u533A\uFF08\u4E0A\u56FE\u84DD\u8272\u90E8\u5206\uFF09\uFF0C\u5728 Direct Memory \u4E2D\uFF0C\u5982\u679C\u4F7F\u7528\u7684\u662F DirectByteBuffer\uFF0C\u90A3\u4E48\u5728\u5206\u914D\u5185\u5B58\u4E0D\u591F\u65F6\u5219\u662F GC \u901A\u8FC7\xA0<code>Cleaner#clean</code>\xA0\u95F4\u63A5\u7BA1\u7406\u3002</p><p>\u4EFB\u4F55\u81EA\u52A8\u5185\u5B58\u7BA1\u7406\u7CFB\u7EDF\u90FD\u4F1A\u9762\u4E34\u7684\u6B65\u9AA4\uFF1A\u4E3A\u65B0\u5BF9\u8C61\u5206\u914D\u7A7A\u95F4\uFF0C\u7136\u540E\u6536\u96C6\u5783\u573E\u5BF9\u8C61\u7A7A\u95F4\uFF0C\u4E0B\u9762\u6211\u4EEC\u5C31\u5C55\u5F00\u4ECB\u7ECD\u4E00\u4E0B\u8FD9\u4E9B\u57FA\u7840\u77E5\u8BC6\u3002</p><p><strong>2.3 \u5206\u914D\u5BF9\u8C61</strong></p><p>Java \u4E2D\u5BF9\u8C61\u5730\u5740\u64CD\u4F5C\u4E3B\u8981\u4F7F\u7528 Unsafe \u8C03\u7528\u4E86 C \u7684 allocate \u548C free \u4E24\u4E2A\u65B9\u6CD5\uFF0C\u5206\u914D\u65B9\u6CD5\u6709\u4E24\u79CD\uFF1A</p><ul><li><p>**\u7A7A\u95F2\u94FE\u8868\uFF08free list\uFF09\uFF1A**\u901A\u8FC7\u989D\u5916\u7684\u5B58\u50A8\u8BB0\u5F55\u7A7A\u95F2\u7684\u5730\u5740\uFF0C\u5C06\u968F\u673A IO \u53D8\u4E3A\u987A\u5E8F IO\uFF0C\u4F46\u5E26\u6765\u4E86\u989D\u5916\u7684\u7A7A\u95F4\u6D88\u8017\u3002</p></li><li><p>**\u78B0\u649E\u6307\u9488\uFF08bump \xA0pointer\uFF09\uFF1A**\u901A\u8FC7\u4E00\u4E2A\u6307\u9488\u4F5C\u4E3A\u5206\u754C\u70B9\uFF0C\u9700\u8981\u5206\u914D\u5185\u5B58\u65F6\uFF0C\u4EC5\u9700\u628A\u6307\u9488\u5F80\u7A7A\u95F2\u7684\u4E00\u7AEF\u79FB\u52A8\u4E0E\u5BF9\u8C61\u5927\u5C0F\u76F8\u7B49\u7684\u8DDD\u79BB\uFF0C\u5206\u914D\u6548\u7387\u8F83\u9AD8\uFF0C\u4F46\u4F7F\u7528\u573A\u666F\u6709\u9650\u3002</p></li></ul><p><strong>2.4 \u6536\u96C6\u5BF9\u8C61</strong></p><p><strong>2.4.1 \u8BC6\u522B\u5783\u573E</strong></p><ul><li><p>**\u5F15\u7528\u8BA1\u6570\u6CD5\uFF08Reference Counting\uFF09\uFF1A**\u5BF9\u6BCF\u4E2A\u5BF9\u8C61\u7684\u5F15\u7528\u8FDB\u884C\u8BA1\u6570\uFF0C\u6BCF\u5F53\u6709\u4E00\u4E2A\u5730\u65B9\u5F15\u7528\u5B83\u65F6\u8BA1\u6570\u5668 +1\u3001\u5F15\u7528\u5931\u6548\u5219 -1\uFF0C\u5F15\u7528\u7684\u8BA1\u6570\u653E\u5230\u5BF9\u8C61\u5934\u4E2D\uFF0C\u5927\u4E8E 0 \u7684\u5BF9\u8C61\u88AB\u8BA4\u4E3A\u662F\u5B58\u6D3B\u5BF9\u8C61\u3002\u867D\u7136\u5FAA\u73AF\u5F15\u7528\u7684\u95EE\u9898\u53EF\u901A\u8FC7 Recycler \u7B97\u6CD5\u89E3\u51B3\uFF0C\u4F46\u662F\u5728\u591A\u7EBF\u7A0B\u73AF\u5883\u4E0B\uFF0C\u5F15\u7528\u8BA1\u6570\u53D8\u66F4\u4E5F\u8981\u8FDB\u884C\u6602\u8D35\u7684\u540C\u6B65\u64CD\u4F5C\uFF0C\u6027\u80FD\u8F83\u4F4E\uFF0C\u65E9\u671F\u7684\u7F16\u7A0B\u8BED\u8A00\u4F1A\u91C7\u7528\u6B64\u7B97\u6CD5\u3002</p></li><li><p>**\u53EF\u8FBE\u6027\u5206\u6790\uFF0C\u53C8\u79F0\u5F15\u7528\u94FE\u6CD5\uFF08Tracing GC\uFF09\uFF1A**\u4ECE GC Root \u5F00\u59CB\u8FDB\u884C\u5BF9\u8C61\u641C\u7D22\uFF0C\u53EF\u4EE5\u88AB\u641C\u7D22\u5230\u7684\u5BF9\u8C61\u5373\u4E3A\u53EF\u8FBE\u5BF9\u8C61\uFF0C\u6B64\u65F6\u8FD8\u4E0D\u8DB3\u4EE5\u5224\u65AD\u5BF9\u8C61\u662F\u5426\u5B58\u6D3B/\u6B7B\u4EA1\uFF0C\u9700\u8981\u7ECF\u8FC7\u591A\u6B21\u6807\u8BB0\u624D\u80FD\u66F4\u52A0\u51C6\u786E\u5730\u786E\u5B9A\uFF0C\u6574\u4E2A\u8FDE\u901A\u56FE\u4E4B\u5916\u7684\u5BF9\u8C61\u4FBF\u53EF\u4EE5\u4F5C\u4E3A\u5783\u573E\u88AB\u56DE\u6536\u6389\u3002\u76EE\u524D Java \u4E2D\u4E3B\u6D41\u7684\u865A\u62DF\u673A\u5747\u91C7\u7528\u6B64\u7B97\u6CD5\u3002</p></li></ul><p>\u5907\u6CE8\uFF1A\u5F15\u7528\u8BA1\u6570\u6CD5\u662F\u53EF\u4EE5\u5904\u7406\u5FAA\u73AF\u5F15\u7528\u95EE\u9898\u7684\uFF0C\u4E0B\u6B21\u9762\u8BD5\u65F6\u4E0D\u8981\u518D\u8FD9\u4E48\u8BF4\u5566~ ~</p><p><strong>2.4.2 \u6536\u96C6\u7B97\u6CD5</strong></p><p>\u81EA\u4ECE\u6709\u81EA\u52A8\u5185\u5B58\u7BA1\u7406\u51FA\u73B0\u4E4B\u65F6\u5C31\u6709\u7684\u4E00\u4E9B\u6536\u96C6\u7B97\u6CD5\uFF0C\u4E0D\u540C\u7684\u6536\u96C6\u5668\u4E5F\u662F\u5728\u4E0D\u540C\u573A\u666F\u4E0B\u8FDB\u884C\u7EC4\u5408\u3002</p><ul><li><p>**Mark-Sweep\uFF08\u6807\u8BB0-\u6E05\u9664\uFF09\uFF1A**\u56DE\u6536\u8FC7\u7A0B\u4E3B\u8981\u5206\u4E3A\u4E24\u4E2A\u9636\u6BB5\uFF0C\u7B2C\u4E00\u9636\u6BB5\u4E3A\u8FFD\u8E2A\uFF08Tracing\uFF09\u9636\u6BB5\uFF0C\u5373\u4ECE GC Root \u5F00\u59CB\u904D\u5386\u5BF9\u8C61\u56FE\uFF0C\u5E76\u6807\u8BB0\uFF08Mark\uFF09\u6240\u9047\u5230\u7684\u6BCF\u4E2A\u5BF9\u8C61\uFF0C\u7B2C\u4E8C\u9636\u6BB5\u4E3A\u6E05\u9664\uFF08Sweep\uFF09\u9636\u6BB5\uFF0C\u5373\u56DE\u6536\u5668\u68C0\u67E5\u5806\u4E2D\u6BCF\u4E00\u4E2A\u5BF9\u8C61\uFF0C\u5E76\u5C06\u6240\u6709\u672A\u88AB\u6807\u8BB0\u7684\u5BF9\u8C61\u8FDB\u884C\u56DE\u6536\uFF0C\u6574\u4E2A\u8FC7\u7A0B\u4E0D\u4F1A\u53D1\u751F\u5BF9\u8C61\u79FB\u52A8\u3002\u6574\u4E2A\u7B97\u6CD5\u5728\u4E0D\u540C\u7684\u5B9E\u73B0\u4E2D\u4F1A\u4F7F\u7528\u4E09\u8272\u62BD\u8C61\uFF08Tricolour Abstraction\uFF09\u3001\u4F4D\u56FE\u6807\u8BB0\uFF08BitMap\uFF09\u7B49\u6280\u672F\u6765\u63D0\u9AD8\u7B97\u6CD5\u7684\u6548\u7387\uFF0C\u5B58\u6D3B\u5BF9\u8C61\u8F83\u591A\u65F6\u8F83\u9AD8\u6548\u3002</p></li><li><p>**Mark-Compact \uFF08\u6807\u8BB0-\u6574\u7406\uFF09\uFF1A**\u8FD9\u4E2A\u7B97\u6CD5\u7684\u4E3B\u8981\u76EE\u7684\u5C31\u662F\u89E3\u51B3\u5728\u975E\u79FB\u52A8\u5F0F\u56DE\u6536\u5668\u4E2D\u90FD\u4F1A\u5B58\u5728\u7684\u788E\u7247\u5316\u95EE\u9898\uFF0C\u4E5F\u5206\u4E3A\u4E24\u4E2A\u9636\u6BB5\uFF0C\u7B2C\u4E00\u9636\u6BB5\u4E0E Mark-Sweep \u7C7B\u4F3C\uFF0C\u7B2C\u4E8C\u9636\u6BB5\u5219\u4F1A\u5BF9\u5B58\u6D3B\u5BF9\u8C61\u6309\u7167\u6574\u7406\u987A\u5E8F\uFF08Compaction Order\uFF09\u8FDB\u884C\u6574\u7406\u3002\u4E3B\u8981\u5B9E\u73B0\u6709\u53CC\u6307\u9488\uFF08Two-Finger\uFF09\u56DE\u6536\u7B97\u6CD5\u3001\u6ED1\u52A8\u56DE\u6536\uFF08Lisp2\uFF09\u7B97\u6CD5\u548C\u5F15\u7EBF\u6574\u7406\uFF08Threaded Compaction\uFF09\u7B97\u6CD5\u7B49\u3002</p></li><li><p>**Copying\uFF08\u590D\u5236\uFF09\uFF1A**\u5C06\u7A7A\u95F4\u5206\u4E3A\u4E24\u4E2A\u5927\u5C0F\u76F8\u540C\u7684 From \u548C To \u4E24\u4E2A\u534A\u533A\uFF0C\u540C\u4E00\u65F6\u95F4\u53EA\u4F1A\u4F7F\u7528\u5176\u4E2D\u4E00\u4E2A\uFF0C\u6BCF\u6B21\u8FDB\u884C\u56DE\u6536\u65F6\u5C06\u4E00\u4E2A\u534A\u533A\u7684\u5B58\u6D3B\u5BF9\u8C61\u901A\u8FC7\u590D\u5236\u7684\u65B9\u5F0F\u8F6C\u79FB\u5230\u53E6\u4E00\u4E2A\u534A\u533A\u3002\u6709\u9012\u5F52\uFF08Robert R. Fenichel \u548C Jerome C. Yochelson\u63D0\u51FA\uFF09\u548C\u8FED\u4EE3\uFF08Cheney \u63D0\u51FA\uFF09\u7B97\u6CD5\uFF0C\u4EE5\u53CA\u89E3\u51B3\u4E86\u524D\u4E24\u8005\u9012\u5F52\u6808\u3001\u7F13\u5B58\u884C\u7B49\u95EE\u9898\u7684\u8FD1\u4F3C\u4F18\u5148\u641C\u7D22\u7B97\u6CD5\u3002\u590D\u5236\u7B97\u6CD5\u53EF\u4EE5\u901A\u8FC7\u78B0\u649E\u6307\u9488\u7684\u65B9\u5F0F\u8FDB\u884C\u5FEB\u901F\u5730\u5206\u914D\u5185\u5B58\uFF0C\u4F46\u662F\u4E5F\u5B58\u5728\u7740\u7A7A\u95F4\u5229\u7528\u7387\u4E0D\u9AD8\u7684\u7F3A\u70B9\uFF0C\u53E6\u5916\u5C31\u662F\u5B58\u6D3B\u5BF9\u8C61\u6BD4\u8F83\u5927\u65F6\u590D\u5236\u7684\u6210\u672C\u6BD4\u8F83\u9AD8\u3002</p></li></ul><p>\u4E09\u79CD\u7B97\u6CD5\u5728\u662F\u5426\u79FB\u52A8\u5BF9\u8C61\u3001\u7A7A\u95F4\u548C\u65F6\u95F4\u65B9\u9762\u7684\u4E00\u4E9B\u5BF9\u6BD4\uFF0C\u5047\u8BBE\u5B58\u6D3B\u5BF9\u8C61\u6570\u91CF\u4E3A\xA0<em>L</em>\u3001\u5806\u7A7A\u95F4\u5927\u5C0F\u4E3A\xA0<em>H</em>\uFF0C\u5219\uFF1A</p><p><img src="https://upload-images.jianshu.io/upload_images/1179389-03f497067b9ff350?imageMogr2/auto-orient/strip|imageView2/2/w/1240" alt=""></p><p>\u628A mark\u3001sweep\u3001compaction\u3001copying \u8FD9\u51E0\u79CD\u52A8\u4F5C\u7684\u8017\u65F6\u653E\u5728\u4E00\u8D77\u770B\uFF0C\u5927\u81F4\u6709\u8FD9\u6837\u7684\u5173\u7CFB\uFF1A</p><p><img src="https://upload-images.jianshu.io/upload_images/1179389-a1c69e01cb02c636?imageMogr2/auto-orient/strip|imageView2/2/w/1240" alt=""></p><p>\u867D\u7136 compaction \u4E0E copying \u90FD\u6D89\u53CA\u79FB\u52A8\u5BF9\u8C61\uFF0C\u4F46\u53D6\u51B3\u4E8E\u5177\u4F53\u7B97\u6CD5\uFF0Ccompaction \u53EF\u80FD\u8981\u5148\u8BA1\u7B97\u4E00\u6B21\u5BF9\u8C61\u7684\u76EE\u6807\u5730\u5740\uFF0C\u7136\u540E\u4FEE\u6B63\u6307\u9488\uFF0C\u6700\u540E\u518D\u79FB\u52A8\u5BF9\u8C61\u3002copying \u5219\u53EF\u4EE5\u628A\u8FD9\u51E0\u4EF6\u4E8B\u60C5\u5408\u4E3A\u4E00\u4F53\u6765\u505A\uFF0C\u6240\u4EE5\u53EF\u4EE5\u5FEB\u4E00\u4E9B\u3002\u53E6\u5916\uFF0C\u8FD8\u9700\u8981\u7559\u610F GC \u5E26\u6765\u7684\u5F00\u9500\u4E0D\u80FD\u53EA\u770B Collector \u7684\u8017\u65F6\uFF0C\u8FD8\u5F97\u770B Allocator \u3002\u5982\u679C\u80FD\u4FDD\u8BC1\u5185\u5B58\u6CA1\u788E\u7247\uFF0C\u5206\u914D\u5C31\u53EF\u4EE5\u7528 pointer bumping \u65B9\u5F0F\uFF0C\u53EA\u9700\u8981\u632A\u4E00\u4E2A\u6307\u9488\u5C31\u5B8C\u6210\u4E86\u5206\u914D\uFF0C\u975E\u5E38\u5FEB\u3002\u800C\u5982\u679C\u5185\u5B58\u6709\u788E\u7247\u5C31\u5F97\u7528 freelist \u4E4B\u7C7B\u7684\u65B9\u5F0F\u7BA1\u7406\uFF0C\u5206\u914D\u901F\u5EA6\u901A\u5E38\u4F1A\u6162\u4E00\u4E9B\u3002</p><p><strong>2.5 \u6536\u96C6\u5668</strong></p>',21),_=i("\u76EE\u524D\u5728 Hotspot VM \u4E2D\u4E3B\u8981\u6709\u5206\u4EE3\u6536\u96C6\u548C\u5206\u533A\u6536\u96C6\u4E24\u5927\u7C7B\uFF0C\u5177\u4F53\u53EF\u4EE5\u770B\u4E0B\u9762\u7684\u8FD9\u4E2A\u56FE\uFF0C\u4E0D\u8FC7\u672A\u6765\u4F1A\u9010\u6E10\u5411\u5206\u533A\u6536\u96C6\u53D1\u5C55\u3002\u5728\u7F8E\u56E2\u5185\u90E8\uFF0C\u6709\u90E8\u5206\u4E1A\u52A1\u5C1D\u8BD5\u7528\u4E86 ZGC\uFF08\u611F\u5174\u8DA3\u7684\u540C\u5B66\u53EF\u4EE5\u5B66\u4E60\u4E0B\u8FD9\u7BC7\u6587\u7AE0\u300A"),C={href:"http://mp.weixin.qq.com/s?__biz=MjM5NjQ5MTI5OA==&mid=2651752559&idx=1&sn=c720b67e93db1885d72dab8799bba78c&chksm=bd1251228a65d834db610deb2ce55003e0fc1f90793e84873096db19027936f6add301242545&scene=21#wechat_redirect",target:"_blank",rel:"noopener noreferrer"},h=i("\u65B0\u4E00\u4EE3\u5783\u573E\u56DE\u6536\u5668ZGC\u7684\u63A2\u7D22\u4E0E\u5B9E\u8DF5"),M=i("\u300B\uFF09\uFF0C\u5176\u4F59\u57FA\u672C\u90FD\u505C\u7559\u5728 CMS \u548C G1 \u4E0A\u3002\u53E6\u5916\u5728 JDK11 \u540E\u63D0\u4F9B\u4E86\u4E00\u4E2A\u4E0D\u6267\u884C\u4EFB\u4F55\u5783\u573E\u56DE\u6536\u52A8\u4F5C\u7684\u56DE\u6536\u5668 Epsilon\uFF08A No-Op Garbage Collector\uFF09\u7528\u4F5C\u6027\u80FD\u5206\u6790\u3002\u53E6\u5916\u4E00\u4E2A\u5C31\u662F Azul \u7684 Zing JVM\uFF0C\u5176 C4\uFF08Concurrent Continuously Compacting Collector\uFF09\u6536\u96C6\u5668\u4E5F\u5728\u4E1A\u5185\u6709\u4E00\u5B9A\u7684\u5F71\u54CD\u529B\u3002"),f=e("p",null,[e("img",{src:"https://upload-images.jianshu.io/upload_images/1179389-6c3339b84c2861cf?imageMogr2/auto-orient/strip|imageView2/2/w/1240",alt:""})],-1),G=e("p",null,"\u5907\u6CE8\uFF1A\u503C\u5F97\u4E00\u63D0\u7684\u662F\uFF0C\u65E9\u4E9B\u5E74\u56FD\u5185 GC \u6280\u672F\u7684\u5E03\u9053\u8005 RednaxelaFX \uFF08\u6C5F\u6E56\u4EBA\u79F0 R \u5927\uFF09\u66FE\u5C31\u804C\u4E8E Azul\uFF0C\u672C\u6587\u7684\u4E00\u90E8\u5206\u6750\u6599\u4E5F\u53C2\u8003\u4E86\u4ED6\u7684\u4E00\u4E9B\u6587\u7AE0\u3002",-1),S=e("p",null,[e("strong",null,"2.5.1 \u5206\u4EE3\u6536\u96C6\u5668")],-1),y=e("li",null,[e("p",null,[i("**ParNew\uFF1A**\u4E00\u6B3E\u591A\u7EBF\u7A0B\u7684\u6536\u96C6\u5668\uFF0C\u91C7\u7528\u590D\u5236\u7B97\u6CD5\uFF0C\u4E3B\u8981\u5DE5\u4F5C\u5728 Young \u533A\uFF0C\u53EF\u4EE5\u901A\u8FC7\xA0"),e("code",null,"-XX:ParallelGCThreads"),i("\xA0\u53C2\u6570\u6765\u63A7\u5236\u6536\u96C6\u7684\u7EBF\u7A0B\u6570\uFF0C\u6574\u4E2A\u8FC7\u7A0B\u90FD\u662F STW \u7684\uFF0C\u5E38\u4E0E CMS \u7EC4\u5408\u4F7F\u7528\u3002")])],-1),k=i("**CMS\uFF1A**\u4EE5\u83B7\u53D6\u6700\u77ED\u56DE\u6536\u505C\u987F\u65F6\u95F4\u4E3A\u76EE\u6807\uFF0C\u91C7\u7528\u201C\u6807\u8BB0-\u6E05\u9664\u201D\u7B97\u6CD5\uFF0C\u5206 4 \u5927\u6B65\u8FDB\u884C\u5783\u573E\u6536\u96C6\uFF0C\u5176\u4E2D\u521D\u59CB\u6807\u8BB0\u548C\u91CD\u65B0\u6807\u8BB0\u4F1A STW \uFF0C\u591A\u6570\u5E94\u7528\u4E8E\u4E92\u8054\u7F51\u7AD9\u6216\u8005 B/S \u7CFB\u7EDF\u7684\u670D\u52A1\u5668\u7AEF\u4E0A\uFF0CJDK9 \u88AB\u6807\u8BB0\u5F03\u7528\uFF0CJDK14 \u88AB\u5220\u9664\uFF0C\u8BE6\u60C5\u53EF\u89C1\xA0"),q={href:"https://openjdk.java.net/jeps/363",target:"_blank",rel:"noopener noreferrer"},w=i("JEP 363"),T=i("\u3002"),x=l('<h4 id="_2-5-2-\u5206\u533A\u6536\u96C6\u5668" tabindex="-1"><a class="header-anchor" href="#_2-5-2-\u5206\u533A\u6536\u96C6\u5668" aria-hidden="true">#</a> 2.5.2 \u5206\u533A\u6536\u96C6\u5668</h4><ul><li><p>**G1\uFF1A**\u4E00\u79CD\u670D\u52A1\u5668\u7AEF\u7684\u5783\u573E\u6536\u96C6\u5668\uFF0C\u5E94\u7528\u5728\u591A\u5904\u7406\u5668\u548C\u5927\u5BB9\u91CF\u5185\u5B58\u73AF\u5883\u4E2D\uFF0C\u5728\u5B9E\u73B0\u9AD8\u541E\u5410\u91CF\u7684\u540C\u65F6\uFF0C\u5C3D\u53EF\u80FD\u5730\u6EE1\u8DB3\u5783\u573E\u6536\u96C6\u6682\u505C\u65F6\u95F4\u7684\u8981\u6C42\u3002</p></li><li><p>**ZGC\uFF1A**JDK11 \u4E2D\u63A8\u51FA\u7684\u4E00\u6B3E\u4F4E\u5EF6\u8FDF\u5783\u573E\u56DE\u6536\u5668\uFF0C\u9002\u7528\u4E8E\u5927\u5185\u5B58\u4F4E\u5EF6\u8FDF\u670D\u52A1\u7684\u5185\u5B58\u7BA1\u7406\u548C\u56DE\u6536\uFF0CSPECjbb 2015 \u57FA\u51C6\u6D4B\u8BD5\uFF0C\u5728 128G \u7684\u5927\u5806\u4E0B\uFF0C\u6700\u5927\u505C\u987F\u65F6\u95F4\u624D 1.68 ms\uFF0C\u505C\u987F\u65F6\u95F4\u8FDC\u80DC\u4E8E G1 \u548C CMS\u3002</p></li><li><p>**Shenandoah\uFF1A**\u7531 Red Hat \u7684\u4E00\u4E2A\u56E2\u961F\u8D1F\u8D23\u5F00\u53D1\uFF0C\u4E0E G1 \u7C7B\u4F3C\uFF0C\u57FA\u4E8E Region \u8BBE\u8BA1\u7684\u5783\u573E\u6536\u96C6\u5668\uFF0C\u4F46\u4E0D\u9700\u8981 Remember Set \u6216\u8005 Card Table \u6765\u8BB0\u5F55\u8DE8 Region \u5F15\u7528\uFF0C\u505C\u987F\u65F6\u95F4\u548C\u5806\u7684\u5927\u5C0F\u6CA1\u6709\u4EFB\u4F55\u5173\u7CFB\u3002\u505C\u987F\u65F6\u95F4\u4E0E ZGC \u63A5\u8FD1\uFF0C\u4E0B\u56FE\u4E3A\u4E0E CMS \u548C G1 \u7B49\u6536\u96C6\u5668\u7684 benchmark\u3002</p></li></ul><p><img src="https://upload-images.jianshu.io/upload_images/1179389-238d04be0f931ddc?imageMogr2/auto-orient/strip|imageView2/2/w/1240" alt=""></p><p><strong>2.5.3 \u5E38\u7528\u6536\u96C6\u5668</strong></p><p>\u76EE\u524D\u4F7F\u7528\u6700\u591A\u7684\u662F CMS \u548C G1 \u6536\u96C6\u5668\uFF0C\u4E8C\u8005\u90FD\u6709\u5206\u4EE3\u7684\u6982\u5FF5\uFF0C\u4E3B\u8981\u5185\u5B58\u7ED3\u6784\u5982\u4E0B\uFF1A</p><p><img src="https://upload-images.jianshu.io/upload_images/1179389-8082240b37153163.gif?imageMogr2/auto-orient/strip|imageView2/2/w/1240" alt=""></p><p><strong>2.5.4 \u5176\u4ED6\u6536\u96C6\u5668</strong></p><p>\u4EE5\u4E0A\u4EC5\u5217\u51FA\u5E38\u89C1\u6536\u96C6\u5668\uFF0C\u9664\u6B64\u4E4B\u5916\u8FD8\u6709\u5F88\u591A\uFF0C\u5982 Metronome\u3001Stopless\u3001Staccato\u3001Chicken\u3001Clover \u7B49\u5B9E\u65F6\u56DE\u6536\u5668\uFF0CSapphire\u3001Compressor\u3001Pauseless \u7B49\u5E76\u53D1\u590D\u5236/\u6574\u7406\u56DE\u6536\u5668\uFF0CDoligez-Leroy-Conthier \u7B49\u6807\u8BB0\u6574\u7406\u56DE\u6536\u5668\uFF0C\u7531\u4E8E\u7BC7\u5E45\u539F\u56E0\uFF0C\u4E0D\u5728\u6B64\u4E00\u4E00\u4ECB\u7ECD\u3002</p><p><strong>2.6 \u5E38\u7528\u5DE5\u5177</strong></p><p>\u5DE5\u6B32\u5584\u5176\u4E8B\uFF0C\u5FC5\u5148\u5229\u5176\u5668\uFF0C\u6B64\u5904\u5217\u51FA\u4E00\u4E9B\u7B14\u8005\u5E38\u7528\u7684\u5DE5\u5177\uFF0C\u5177\u4F53\u60C5\u51B5\u5927\u5BB6\u53EF\u4EE5\u81EA\u7531\u9009\u62E9\uFF0C\u672C\u6587\u7684\u95EE\u9898\u90FD\u662F\u4F7F\u7528\u8FD9\u4E9B\u5DE5\u5177\u6765\u5B9A\u4F4D\u548C\u5206\u6790\u7684\u3002</p><p><strong>2.6.1 \u547D\u4EE4\u884C\u7EC8\u7AEF</strong></p><ul><li><p><strong>\u6807\u51C6\u7EC8\u7AEF\u7C7B</strong>\uFF1Ajps\u3001jinfo\u3001jstat\u3001jstack\u3001jmap</p></li><li><p><strong>\u529F\u80FD\u6574\u5408\u7C7B</strong>\uFF1Ajcmd\u3001vjtools\u3001arthas\u3001greys</p></li></ul><p><strong>2.6.2 \u53EF\u89C6\u5316\u754C\u9762</strong></p><ul><li><p><strong>\u7B80\u6613</strong>\uFF1AJConsole\u3001JVisualvm\u3001HA\u3001GCHisto\u3001GCViewer</p></li><li><p><strong>\u8FDB\u9636</strong>\uFF1AMAT\u3001JProfiler</p></li></ul>',14),O=i("\u547D\u4EE4\u884C\u63A8\u8350 arthas \uFF0C\u53EF\u89C6\u5316\u754C\u9762\u63A8\u8350 JProfiler\uFF0C\u6B64\u5916\u8FD8\u6709\u4E00\u4E9B\u5728\u7EBF\u7684\u5E73\u53F0\xA0"),I={href:"https://gceasy.io/",target:"_blank",rel:"noopener noreferrer"},R=i("gceasy"),z=i("\u3001"),F={href:"https://heaphero.io/",target:"_blank",rel:"noopener noreferrer"},N=i("heaphero"),J=i("\u3001"),X={href:"https://fastthread.io/",target:"_blank",rel:"noopener noreferrer"},P=i("fastthread"),L=i("\xA0\uFF0C\u7F8E\u56E2\u5185\u90E8\u7684 Scalpel\uFF08\u4E00\u6B3E\u81EA\u7814\u7684 JVM \u95EE\u9898\u8BCA\u65AD\u5DE5\u5177\uFF0C\u6682\u65F6\u672A\u5F00\u6E90\uFF09\u4E5F\u6BD4\u8F83\u597D\u7528\u3002"),B=l(`<p><strong>3. GC \u95EE\u9898\u5224\u65AD</strong></p><p>\u5728\u505A GC \u95EE\u9898\u6392\u67E5\u548C\u4F18\u5316\u4E4B\u524D\uFF0C\u6211\u4EEC\u9700\u8981\u5148\u6765\u660E\u786E\u4E0B\u5230\u5E95\u662F\u4E0D\u662F GC \u76F4\u63A5\u5BFC\u81F4\u7684\u95EE\u9898\uFF0C\u6216\u8005\u5E94\u7528\u4EE3\u7801\u5BFC\u81F4\u7684 GC \u5F02\u5E38\uFF0C\u6700\u7EC8\u51FA\u73B0\u95EE\u9898\u3002</p><p><strong>3.1 \u5224\u65AD GC \u6709\u6CA1\u6709\u95EE\u9898\uFF1F</strong></p><p><strong>3.1.1 \u8BBE\u5B9A\u8BC4\u4EF7\u6807\u51C6</strong></p><p>\u8BC4\u5224 GC \u7684\u4E24\u4E2A\u6838\u5FC3\u6307\u6807\uFF1A</p><ul><li><p>**\u5EF6\u8FDF\uFF08Latency\uFF09\uFF1A**\u4E5F\u53EF\u4EE5\u7406\u89E3\u4E3A\u6700\u5927\u505C\u987F\u65F6\u95F4\uFF0C\u5373\u5783\u573E\u6536\u96C6\u8FC7\u7A0B\u4E2D\u4E00\u6B21 STW \u7684\u6700\u957F\u65F6\u95F4\uFF0C\u8D8A\u77ED\u8D8A\u597D\uFF0C\u4E00\u5B9A\u7A0B\u5EA6\u4E0A\u53EF\u4EE5\u63A5\u53D7\u9891\u6B21\u7684\u589E\u5927\uFF0CGC \u6280\u672F\u7684\u4E3B\u8981\u53D1\u5C55\u65B9\u5411\u3002</p></li><li><p>**\u541E\u5410\u91CF\uFF08Throughput\uFF09\uFF1A**\u5E94\u7528\u7CFB\u7EDF\u7684\u751F\u547D\u5468\u671F\u5185\uFF0C\u7531\u4E8E GC \u7EBF\u7A0B\u4F1A\u5360\u7528 Mutator \u5F53\u524D\u53EF\u7528\u7684 CPU \u65F6\u949F\u5468\u671F\uFF0C\u541E\u5410\u91CF\u5373\u4E3A Mutator \u6709\u6548\u82B1\u8D39\u7684\u65F6\u95F4\u5360\u7CFB\u7EDF\u603B\u8FD0\u884C\u65F6\u95F4\u7684\u767E\u5206\u6BD4\uFF0C\u4F8B\u5982\u7CFB\u7EDF\u8FD0\u884C\u4E86 100 min\uFF0CGC \u8017\u65F6 1 min\uFF0C\u5219\u7CFB\u7EDF\u541E\u5410\u91CF\u4E3A 99%\uFF0C\u541E\u5410\u91CF\u4F18\u5148\u7684\u6536\u96C6\u5668\u53EF\u4EE5\u63A5\u53D7\u8F83\u957F\u7684\u505C\u987F\u3002</p></li></ul><p>\u76EE\u524D\u5404\u5927\u4E92\u8054\u7F51\u516C\u53F8\u7684\u7CFB\u7EDF\u57FA\u672C\u90FD\u66F4\u8FFD\u6C42\u4F4E\u5EF6\u65F6\uFF0C\u907F\u514D\u4E00\u6B21 GC \u505C\u987F\u7684\u65F6\u95F4\u8FC7\u957F\u5BF9\u7528\u6237\u4F53\u9A8C\u9020\u6210\u635F\u5931\uFF0C\u8861\u91CF\u6307\u6807\u9700\u8981\u7ED3\u5408\u4E00\u4E0B\u5E94\u7528\u670D\u52A1\u7684 SLA\uFF0C\u4E3B\u8981\u5982\u4E0B\u4E24\u70B9\u6765\u5224\u65AD\uFF1A</p><p><img src="https://upload-images.jianshu.io/upload_images/1179389-0116d4ae68567826?imageMogr2/auto-orient/strip|imageView2/2/w/1240" alt=""></p><p>\u7B80\u800C\u8A00\u4E4B\uFF0C\u5373\u4E3A<strong>\u4E00\u6B21\u505C\u987F\u7684\u65F6\u95F4\u4E0D\u8D85\u8FC7\u5E94\u7528\u670D\u52A1\u7684 TP9999\uFF0CGC \u7684\u541E\u5410\u91CF\u4E0D\u5C0F\u4E8E 99.99%</strong>\u3002\u4E3E\u4E2A\u4F8B\u5B50\uFF0C\u5047\u8BBE\u67D0\u4E2A\u670D\u52A1 A \u7684 TP9999 \u4E3A 80 ms\uFF0C\u5E73\u5747 GC \u505C\u987F\u4E3A 30 ms\uFF0C\u90A3\u4E48\u8BE5\u670D\u52A1\u7684\u6700\u5927\u505C\u987F\u65F6\u95F4\u6700\u597D\u4E0D\u8981\u8D85\u8FC7 80 ms\uFF0CGC \u9891\u6B21\u63A7\u5236\u5728 5 min \u4EE5\u4E0A\u4E00\u6B21\u3002\u5982\u679C\u6EE1\u8DB3\u4E0D\u4E86\uFF0C\u90A3\u5C31\u9700\u8981\u8C03\u4F18\u6216\u8005\u901A\u8FC7\u66F4\u591A\u8D44\u6E90\u6765\u8FDB\u884C\u5E76\u8054\u5197\u4F59\u3002\uFF08\u5927\u5BB6\u53EF\u4EE5\u5148\u505C\u4E0B\u6765\uFF0C\u770B\u770B\u76D1\u63A7\u5E73\u53F0\u4E0A\u9762\u7684 gc.meantime \u5206\u949F\u7EA7\u522B\u6307\u6807\uFF0C\u5982\u679C\u8D85\u8FC7\u4E86 6 ms \u90A3\u5355\u673A GC \u541E\u5410\u91CF\u5C31\u8FBE\u4E0D\u5230 4 \u4E2A 9 \u4E86\u3002\uFF09</p><p>\u5907\u6CE8\uFF1A\u9664\u4E86\u8FD9\u4E24\u4E2A\u6307\u6807\u4E4B\u5916\u8FD8\u6709 Footprint\uFF08\u8D44\u6E90\u91CF\u5927\u5C0F\u6D4B\u91CF\uFF09\u3001\u53CD\u5E94\u901F\u5EA6\u7B49\u6307\u6807\uFF0C\u4E92\u8054\u7F51\u8FD9\u79CD\u5B9E\u65F6\u7CFB\u7EDF\u8FFD\u6C42\u4F4E\u5EF6\u8FDF\uFF0C\u800C\u5F88\u591A\u5D4C\u5165\u5F0F\u7CFB\u7EDF\u5219\u8FFD\u6C42 Footprint\u3002</p><p><strong>3.1.2 \u8BFB\u61C2 GC Cause</strong></p><p>\u62FF\u5230 GC \u65E5\u5FD7\uFF0C\u6211\u4EEC\u5C31\u53EF\u4EE5\u7B80\u5355\u5206\u6790 GC \u60C5\u51B5\u4E86\uFF0C\u901A\u8FC7\u4E00\u4E9B\u5DE5\u5177\uFF0C\u6211\u4EEC\u53EF\u4EE5\u6BD4\u8F83\u76F4\u89C2\u5730\u770B\u5230 Cause \u7684\u5206\u5E03\u60C5\u51B5\uFF0C\u5982\u4E0B\u56FE\u5C31\u662F\u4F7F\u7528 gceasy \u7ED8\u5236\u7684\u56FE\u8868\uFF1A</p><p><img src="https://upload-images.jianshu.io/upload_images/1179389-955a1b25ed4cf223?imageMogr2/auto-orient/strip|imageView2/2/w/1240" alt=""></p><p>\u5982\u4E0A\u56FE\u6240\u793A\uFF0C\u6211\u4EEC\u5F88\u6E05\u6670\u7684\u5C31\u80FD\u77E5\u9053\u662F\u4EC0\u4E48\u539F\u56E0\u5F15\u8D77\u7684 GC\uFF0C\u4EE5\u53CA\u6BCF\u6B21\u7684\u65F6\u95F4\u82B1\u8D39\u60C5\u51B5\uFF0C\u4F46\u662F\u8981\u5206\u6790 GC \u7684\u95EE\u9898\uFF0C\u5148\u8981\u8BFB\u61C2 GC Cause\uFF0C\u5373 JVM \u4EC0\u4E48\u6837\u7684\u6761\u4EF6\u4E0B\u9009\u62E9\u8FDB\u884C GC \u64CD\u4F5C\uFF0C\u5177\u4F53 Cause \u7684\u5206\u7C7B\u53EF\u4EE5\u770B\u4E00\u4E0B Hotspot \u6E90\u7801\uFF1Asrc/share/vm/gc/shared/gcCause.hpp \u548C src/share/vm/gc/shared/gcCause.cpp \u4E2D\u3002</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>const char* GCCause::to_string(GCCause::Cause cause) {
+import{_ as a}from"./plugin-vue_export-helper.21dcd24c.js";import{r,o as t,c as d,a as e,b as s,e as l,d as i}from"./app.615e41d8.js";const c={},o=l('<h1 id="java\u4E2D9\u79CD\u5E38\u89C1\u7684cms-gc\u95EE\u9898\u5206\u6790\u4E0E\u89E3\u51B3" tabindex="-1"><a class="header-anchor" href="#java\u4E2D9\u79CD\u5E38\u89C1\u7684cms-gc\u95EE\u9898\u5206\u6790\u4E0E\u89E3\u51B3" aria-hidden="true">#</a> Java\u4E2D9\u79CD\u5E38\u89C1\u7684CMS GC\u95EE\u9898\u5206\u6790\u4E0E\u89E3\u51B3</h1><p><strong>1.1 \u5F15\u8A00</strong></p><p>\u81EA Sun \u53D1\u5E03 Java \u8BED\u8A00\u4EE5\u6765\uFF0C\u5F00\u59CB\u4F7F\u7528 GC \u6280\u672F\u6765\u8FDB\u884C\u5185\u5B58\u81EA\u52A8\u7BA1\u7406\uFF0C\u907F\u514D\u4E86\u624B\u52A8\u7BA1\u7406\u5E26\u6765\u7684\u60AC\u6302\u6307\u9488\uFF08Dangling Pointer\uFF09\u95EE\u9898\uFF0C\u5F88\u5927\u7A0B\u5EA6\u4E0A\u63D0\u5347\u4E86\u5F00\u53D1\u6548\u7387\uFF0C\u4ECE\u6B64 GC \u6280\u672F\u4E5F\u4E00\u4E3E\u6210\u540D\u3002GC \u6709\u7740\u975E\u5E38\u60A0\u4E45\u7684\u5386\u53F2\uFF0C1960 \u5E74\u6709\u7740\u201CLisp \u4E4B\u7236\u201D\u548C\u201C\u4EBA\u5DE5\u667A\u80FD\u4E4B\u7236\u201D\u4E4B\u79F0\u7684 John McCarthy \u5C31\u5728\u8BBA\u6587\u4E2D\u53D1\u5E03\u4E86 GC \u7B97\u6CD5\uFF0C60 \u5E74\u4EE5\u6765\uFF0C GC \u6280\u672F\u7684\u53D1\u5C55\u4E5F\u7A81\u98DE\u731B\u8FDB\uFF0C\u4F46\u4E0D\u7BA1\u662F\u591A\u4E48\u524D\u6CBF\u7684\u6536\u96C6\u5668\u4E5F\u90FD\u662F\u57FA\u4E8E\u4E09\u79CD\u57FA\u672C\u7B97\u6CD5\u7684\u7EC4\u5408\u6216\u5E94\u7528\uFF0C\u4E5F\u5C31\u662F\u8BF4 GC \u8981\u89E3\u51B3\u7684\u6839\u672C\u95EE\u9898\u8FD9\u4E48\u591A\u5E74\u4E00\u76F4\u90FD\u6CA1\u6709\u53D8\u8FC7\u3002\u7B14\u8005\u8BA4\u4E3A\uFF0C\u5728\u4E0D\u592A\u8FDC\u7684\u5C06\u6765\uFF0C GC \u6280\u672F\u4F9D\u7136\u4E0D\u4F1A\u8FC7\u65F6\uFF0C\u6BD4\u8D77\u65E5\u65B0\u6708\u5F02\u7684\u65B0\u6280\u672F\uFF0CGC \u8FD9\u95E8\u53E4\u5178\u6280\u672F\u66F4\u503C\u5F97\u6211\u4EEC\u5B66\u4E60\u3002</p><p>\u90A3\u4E48\uFF0CGC \u95EE\u9898\u5904\u7406\u80FD\u529B\u80FD\u4E0D\u80FD\u7CFB\u7EDF\u6027\u638C\u63E1\uFF1F\u4E00\u4E9B\u5F71\u54CD\u56E0\u7D20\u90FD\u662F<strong>\u4E92\u4E3A\u56E0\u679C</strong>\u7684\u95EE\u9898\u8BE5\u600E\u4E48\u5206\u6790\uFF1F\u6BD4\u5982\u4E00\u4E2A\u670D\u52A1 RT \u7A81\u7136\u4E0A\u6DA8\uFF0C\u6709 GC \u8017\u65F6\u589E\u5927\u3001\u7EBF\u7A0B Block \u589E\u591A\u3001\u6162\u67E5\u8BE2\u589E\u591A\u3001CPU \u8D1F\u8F7D\u9AD8\u56DB\u4E2A\u8868\u8C61\uFF0C\u5230\u5E95\u54EA\u4E2A\u662F\u8BF1\u56E0\uFF1F\u5982\u4F55\u5224\u65AD GC \u6709\u6CA1\u6709\u95EE\u9898\uFF1F\u4F7F\u7528 CMS \u6709\u54EA\u4E9B\u5E38\u89C1\u95EE\u9898\uFF1F\u5982\u4F55\u5224\u65AD\u6839\u56E0\u662F\u4EC0\u4E48\uFF1F\u5982\u4F55\u89E3\u51B3\u6216\u907F\u514D\u8FD9\u4E9B\u95EE\u9898\uFF1F\u9605\u8BFB\u5B8C\u672C\u6587\uFF0C\u76F8\u4FE1\u4F60\u5C06\u4F1A\u5BF9 CMS GC \u7684\u95EE\u9898\u5904\u7406\u6709\u4E00\u4E2A\u7CFB\u7EDF\u6027\u7684\u8BA4\u77E5\uFF0C\u66F4\u80FD\u6E38\u5203\u6709\u4F59\u5730\u89E3\u51B3\u8FD9\u4E9B\u95EE\u9898\uFF0C\u4E0B\u9762\u5C31\u8BA9\u6211\u4EEC\u5F00\u59CB\u5427\uFF01\u6587\u4E2D\u82E5\u6709\u9519\u8BEF\u4E4B\u5904\uFF0C\u8FD8\u8BF7\u5927\u5BB6\u4E0D\u541D\u6307\u6B63\u3002</p><p><strong>1.2 \u6982\u89C8</strong></p><p>\u60F3\u8981\u7CFB\u7EDF\u6027\u5730\u638C\u63E1 GC \u95EE\u9898\u5904\u7406\uFF0C\u7B14\u8005\u8FD9\u91CC\u7ED9\u51FA\u4E00\u4E2A\u5B66\u4E60\u8DEF\u5F84\uFF0C\u6574\u4F53\u6587\u7AE0\u7684\u6846\u67B6\u4E5F\u662F\u6309\u7167\u8FD9\u4E2A\u7ED3\u6784\u5C55\u5F00\uFF0C\u4E3B\u8981\u5206\u56DB\u5927\u6B65\u3002</p><p><img src="https://upload-images.jianshu.io/upload_images/1179389-22ed8367a864013b?imageMogr2/auto-orient/strip|imageView2/2/w/1240" alt=""></p><ul><li><p>**\u5EFA\u7ACB\u77E5\u8BC6\u4F53\u7CFB\uFF1A**\u4ECE JVM \u7684\u5185\u5B58\u7ED3\u6784\u5230\u5783\u573E\u6536\u96C6\u7684\u7B97\u6CD5\u548C\u6536\u96C6\u5668\uFF0C\u5B66\u4E60 GC \u7684\u57FA\u7840\u77E5\u8BC6\uFF0C\u638C\u63E1\u4E00\u4E9B\u5E38\u7528\u7684 GC \u95EE\u9898\u5206\u6790\u5DE5\u5177\u3002</p></li><li><p>**\u786E\u5B9A\u8BC4\u4EF7\u6307\u6807\uFF1A**\u4E86\u89E3\u57FA\u672C GC \u7684\u8BC4\u4EF7\u65B9\u6CD5\uFF0C\u6478\u6E05\u5982\u4F55\u8BBE\u5B9A\u72EC\u7ACB\u7CFB\u7EDF\u7684\u6307\u6807\uFF0C\u4EE5\u53CA\u5728\u4E1A\u52A1\u573A\u666F\u4E2D\u5224\u65AD GC \u662F\u5426\u5B58\u5728\u95EE\u9898\u7684\u624B\u6BB5\u3002</p></li><li><p>**\u573A\u666F\u8C03\u4F18\u5B9E\u8DF5\uFF1A**\u8FD0\u7528\u638C\u63E1\u7684\u77E5\u8BC6\u548C\u7CFB\u7EDF\u8BC4\u4EF7\u6307\u6807\uFF0C\u5206\u6790\u4E0E\u89E3\u51B3\u4E5D\u79CD CMS \u4E2D\u5E38\u89C1 GC \u95EE\u9898\u573A\u666F\u3002</p></li><li><p>**\u603B\u7ED3\u4F18\u5316\u7ECF\u9A8C\uFF1A**\u5BF9\u6574\u4F53\u8FC7\u7A0B\u505A\u603B\u7ED3\u5E76\u63D0\u51FA\u7B14\u8005\u7684\u51E0\u70B9\u5EFA\u8BAE\uFF0C\u540C\u65F6\u5C06\u603B\u7ED3\u5230\u7684\u7ECF\u9A8C\u5B8C\u5584\u5230\u77E5\u8BC6\u4F53\u7CFB\u4E4B\u4E2D\u3002</p></li></ul><p><strong>2. GC \u57FA\u7840</strong></p><p>\u5728\u6B63\u5F0F\u5F00\u59CB\u524D\uFF0C\u5148\u505A\u4E9B\u7B80\u8981\u94FA\u57AB\uFF0C\u4ECB\u7ECD\u4E0B JVM \u5185\u5B58\u5212\u5206\u3001\u6536\u96C6\u7B97\u6CD5\u3001\u6536\u96C6\u5668\u7B49\u5E38\u7528\u6982\u5FF5\u4ECB\u7ECD\uFF0C\u57FA\u7840\u6BD4\u8F83\u597D\u7684\u540C\u5B66\u53EF\u4EE5\u76F4\u63A5\u8DF3\u8FC7\u8FD9\u90E8\u5206\u3002</p><p><strong>2.1 \u57FA\u7840\u6982\u5FF5</strong></p>',11),u=l("<li><p>**GC\uFF1A**GC \u672C\u8EAB\u6709\u4E09\u79CD\u8BED\u4E49\uFF0C\u4E0B\u6587\u9700\u8981\u6839\u636E\u5177\u4F53\u573A\u666F\u5E26\u5165\u4E0D\u540C\u7684\u8BED\u4E49\uFF1A</p></li><li><p><strong>Garbage Collection</strong>\uFF1A\u5783\u573E\u6536\u96C6\u6280\u672F\uFF0C\u540D\u8BCD\u3002</p></li><li><p><strong>Garbage Collector</strong>\uFF1A\u5783\u573E\u6536\u96C6\u5668\uFF0C\u540D\u8BCD\u3002</p></li><li><p><strong>Garbage Collecting</strong>\uFF1A\u5783\u573E\u6536\u96C6\u52A8\u4F5C\uFF0C\u52A8\u8BCD\u3002</p></li><li><p>**Mutator\uFF1A**\u751F\u4EA7\u5783\u573E\u7684\u89D2\u8272\uFF0C\u4E5F\u5C31\u662F\u6211\u4EEC\u7684\u5E94\u7528\u7A0B\u5E8F\uFF0C\u5783\u573E\u5236\u9020\u8005\uFF0C\u901A\u8FC7 Allocator \u8FDB\u884C allocate \u548C free\u3002</p></li><li><p>**TLAB\uFF1A**Thread Local Allocation Buffer \u7684\u7B80\u5199\uFF0C\u57FA\u4E8E CAS \u7684\u72EC\u4EAB\u7EBF\u7A0B\uFF08Mutator Threads\uFF09\u53EF\u4EE5\u4F18\u5148\u5C06\u5BF9\u8C61\u5206\u914D\u5728 Eden \u4E2D\u7684\u4E00\u5757\u5185\u5B58\uFF0C\u56E0\u4E3A\u662F Java \u7EBF\u7A0B\u72EC\u4EAB\u7684\u5185\u5B58\u533A\u6CA1\u6709\u9501\u7ADE\u4E89\uFF0C\u6240\u4EE5\u5206\u914D\u901F\u5EA6\u66F4\u5FEB\uFF0C\u6BCF\u4E2A TLAB \u90FD\u662F\u4E00\u4E2A\u7EBF\u7A0B\u72EC\u4EAB\u7684\u3002</p></li>",6),v=i("**Card Table\uFF1A**\u4E2D\u6587\u7FFB\u8BD1\u4E3A\u5361\u8868\uFF0C\u4E3B\u8981\u662F\u7528\u6765\u6807\u8BB0\u5361\u9875\u7684\u72B6\u6001\uFF0C\u6BCF\u4E2A\u5361\u8868\u9879\u5BF9\u5E94\u4E00\u4E2A\u5361\u9875\u3002\u5F53\u5361\u9875\u4E2D\u4E00\u4E2A\u5BF9\u8C61\u5F15\u7528\u6709\u5199\u64CD\u4F5C\u65F6\uFF0C\u5199\u5C4F\u969C\u5C06\u4F1A\u6807\u8BB0\u5BF9\u8C61\u6240\u5728\u7684\u5361\u8868\u72B6\u6001\u6539\u4E3A dirty\uFF0C\u5361\u8868\u7684\u672C\u8D28\u662F\u7528\u6765\u89E3\u51B3\u8DE8\u4EE3\u5F15\u7528\u7684\u95EE\u9898\u3002\u5177\u4F53\u600E\u4E48\u89E3\u51B3\u7684\u53EF\u4EE5\u53C2\u8003 StackOverflow \u4E0A\u7684\u8FD9\u4E2A\u95EE\u9898\xA0"),m={href:"https://stackoverflow.com/questions/19154607/how-actually-card-table-and-writer-barrier-works",target:"_blank",rel:"noopener noreferrer"},p=i("how-actually-card-table-and-writer-barrier-works"),b=i("\uFF0C\u6216\u8005\u7814\u8BFB\u4E00\u4E0B cardTableRS.app \u4E2D\u7684\u6E90\u7801\u3002"),g=l('<p><strong>2.2 JVM \u5185\u5B58\u5212\u5206</strong></p><p>\u4ECE JCP\uFF08Java Community Process\uFF09\u7684\u5B98\u7F51\u4E2D\u53EF\u4EE5\u770B\u5230\uFF0C\u76EE\u524D Java \u7248\u672C\u6700\u65B0\u5DF2\u7ECF\u5230\u4E86 Java 16\uFF0C\u672A\u6765\u7684 Java 17 \u4EE5\u53CA\u73B0\u5728\u7684 Java 11 \u548C Java 8 \u662F LTS \u7248\u672C\uFF0CJVM \u89C4\u8303\u4E5F\u5728\u968F\u7740\u8FED\u4EE3\u5728\u53D8\u66F4\uFF0C\u7531\u4E8E\u672C\u6587\u4E3B\u8981\u8BA8\u8BBA CMS\uFF0C\u6B64\u5904\u8FD8\u662F\u653E Java 8 \u7684\u5185\u5B58\u7ED3\u6784\u3002</p><p><img src="https://upload-images.jianshu.io/upload_images/1179389-5379d37a996aabf9?imageMogr2/auto-orient/strip|imageView2/2/w/1240" alt=""></p><p>GC \u4E3B\u8981\u5DE5\u4F5C\u5728 Heap \u533A\u548C MetaSpace \u533A\uFF08\u4E0A\u56FE\u84DD\u8272\u90E8\u5206\uFF09\uFF0C\u5728 Direct Memory \u4E2D\uFF0C\u5982\u679C\u4F7F\u7528\u7684\u662F DirectByteBuffer\uFF0C\u90A3\u4E48\u5728\u5206\u914D\u5185\u5B58\u4E0D\u591F\u65F6\u5219\u662F GC \u901A\u8FC7\xA0<code>Cleaner#clean</code>\xA0\u95F4\u63A5\u7BA1\u7406\u3002</p><p>\u4EFB\u4F55\u81EA\u52A8\u5185\u5B58\u7BA1\u7406\u7CFB\u7EDF\u90FD\u4F1A\u9762\u4E34\u7684\u6B65\u9AA4\uFF1A\u4E3A\u65B0\u5BF9\u8C61\u5206\u914D\u7A7A\u95F4\uFF0C\u7136\u540E\u6536\u96C6\u5783\u573E\u5BF9\u8C61\u7A7A\u95F4\uFF0C\u4E0B\u9762\u6211\u4EEC\u5C31\u5C55\u5F00\u4ECB\u7ECD\u4E00\u4E0B\u8FD9\u4E9B\u57FA\u7840\u77E5\u8BC6\u3002</p><p><strong>2.3 \u5206\u914D\u5BF9\u8C61</strong></p><p>Java \u4E2D\u5BF9\u8C61\u5730\u5740\u64CD\u4F5C\u4E3B\u8981\u4F7F\u7528 Unsafe \u8C03\u7528\u4E86 C \u7684 allocate \u548C free \u4E24\u4E2A\u65B9\u6CD5\uFF0C\u5206\u914D\u65B9\u6CD5\u6709\u4E24\u79CD\uFF1A</p><ul><li><p>**\u7A7A\u95F2\u94FE\u8868\uFF08free list\uFF09\uFF1A**\u901A\u8FC7\u989D\u5916\u7684\u5B58\u50A8\u8BB0\u5F55\u7A7A\u95F2\u7684\u5730\u5740\uFF0C\u5C06\u968F\u673A IO \u53D8\u4E3A\u987A\u5E8F IO\uFF0C\u4F46\u5E26\u6765\u4E86\u989D\u5916\u7684\u7A7A\u95F4\u6D88\u8017\u3002</p></li><li><p>**\u78B0\u649E\u6307\u9488\uFF08bump \xA0pointer\uFF09\uFF1A**\u901A\u8FC7\u4E00\u4E2A\u6307\u9488\u4F5C\u4E3A\u5206\u754C\u70B9\uFF0C\u9700\u8981\u5206\u914D\u5185\u5B58\u65F6\uFF0C\u4EC5\u9700\u628A\u6307\u9488\u5F80\u7A7A\u95F2\u7684\u4E00\u7AEF\u79FB\u52A8\u4E0E\u5BF9\u8C61\u5927\u5C0F\u76F8\u7B49\u7684\u8DDD\u79BB\uFF0C\u5206\u914D\u6548\u7387\u8F83\u9AD8\uFF0C\u4F46\u4F7F\u7528\u573A\u666F\u6709\u9650\u3002</p></li></ul><p><strong>2.4 \u6536\u96C6\u5BF9\u8C61</strong></p><p><strong>2.4.1 \u8BC6\u522B\u5783\u573E</strong></p><ul><li><p>**\u5F15\u7528\u8BA1\u6570\u6CD5\uFF08Reference Counting\uFF09\uFF1A**\u5BF9\u6BCF\u4E2A\u5BF9\u8C61\u7684\u5F15\u7528\u8FDB\u884C\u8BA1\u6570\uFF0C\u6BCF\u5F53\u6709\u4E00\u4E2A\u5730\u65B9\u5F15\u7528\u5B83\u65F6\u8BA1\u6570\u5668 +1\u3001\u5F15\u7528\u5931\u6548\u5219 -1\uFF0C\u5F15\u7528\u7684\u8BA1\u6570\u653E\u5230\u5BF9\u8C61\u5934\u4E2D\uFF0C\u5927\u4E8E 0 \u7684\u5BF9\u8C61\u88AB\u8BA4\u4E3A\u662F\u5B58\u6D3B\u5BF9\u8C61\u3002\u867D\u7136\u5FAA\u73AF\u5F15\u7528\u7684\u95EE\u9898\u53EF\u901A\u8FC7 Recycler \u7B97\u6CD5\u89E3\u51B3\uFF0C\u4F46\u662F\u5728\u591A\u7EBF\u7A0B\u73AF\u5883\u4E0B\uFF0C\u5F15\u7528\u8BA1\u6570\u53D8\u66F4\u4E5F\u8981\u8FDB\u884C\u6602\u8D35\u7684\u540C\u6B65\u64CD\u4F5C\uFF0C\u6027\u80FD\u8F83\u4F4E\uFF0C\u65E9\u671F\u7684\u7F16\u7A0B\u8BED\u8A00\u4F1A\u91C7\u7528\u6B64\u7B97\u6CD5\u3002</p></li><li><p>**\u53EF\u8FBE\u6027\u5206\u6790\uFF0C\u53C8\u79F0\u5F15\u7528\u94FE\u6CD5\uFF08Tracing GC\uFF09\uFF1A**\u4ECE GC Root \u5F00\u59CB\u8FDB\u884C\u5BF9\u8C61\u641C\u7D22\uFF0C\u53EF\u4EE5\u88AB\u641C\u7D22\u5230\u7684\u5BF9\u8C61\u5373\u4E3A\u53EF\u8FBE\u5BF9\u8C61\uFF0C\u6B64\u65F6\u8FD8\u4E0D\u8DB3\u4EE5\u5224\u65AD\u5BF9\u8C61\u662F\u5426\u5B58\u6D3B/\u6B7B\u4EA1\uFF0C\u9700\u8981\u7ECF\u8FC7\u591A\u6B21\u6807\u8BB0\u624D\u80FD\u66F4\u52A0\u51C6\u786E\u5730\u786E\u5B9A\uFF0C\u6574\u4E2A\u8FDE\u901A\u56FE\u4E4B\u5916\u7684\u5BF9\u8C61\u4FBF\u53EF\u4EE5\u4F5C\u4E3A\u5783\u573E\u88AB\u56DE\u6536\u6389\u3002\u76EE\u524D Java \u4E2D\u4E3B\u6D41\u7684\u865A\u62DF\u673A\u5747\u91C7\u7528\u6B64\u7B97\u6CD5\u3002</p></li></ul><p>\u5907\u6CE8\uFF1A\u5F15\u7528\u8BA1\u6570\u6CD5\u662F\u53EF\u4EE5\u5904\u7406\u5FAA\u73AF\u5F15\u7528\u95EE\u9898\u7684\uFF0C\u4E0B\u6B21\u9762\u8BD5\u65F6\u4E0D\u8981\u518D\u8FD9\u4E48\u8BF4\u5566~ ~</p><p><strong>2.4.2 \u6536\u96C6\u7B97\u6CD5</strong></p><p>\u81EA\u4ECE\u6709\u81EA\u52A8\u5185\u5B58\u7BA1\u7406\u51FA\u73B0\u4E4B\u65F6\u5C31\u6709\u7684\u4E00\u4E9B\u6536\u96C6\u7B97\u6CD5\uFF0C\u4E0D\u540C\u7684\u6536\u96C6\u5668\u4E5F\u662F\u5728\u4E0D\u540C\u573A\u666F\u4E0B\u8FDB\u884C\u7EC4\u5408\u3002</p><ul><li><p>**Mark-Sweep\uFF08\u6807\u8BB0-\u6E05\u9664\uFF09\uFF1A**\u56DE\u6536\u8FC7\u7A0B\u4E3B\u8981\u5206\u4E3A\u4E24\u4E2A\u9636\u6BB5\uFF0C\u7B2C\u4E00\u9636\u6BB5\u4E3A\u8FFD\u8E2A\uFF08Tracing\uFF09\u9636\u6BB5\uFF0C\u5373\u4ECE GC Root \u5F00\u59CB\u904D\u5386\u5BF9\u8C61\u56FE\uFF0C\u5E76\u6807\u8BB0\uFF08Mark\uFF09\u6240\u9047\u5230\u7684\u6BCF\u4E2A\u5BF9\u8C61\uFF0C\u7B2C\u4E8C\u9636\u6BB5\u4E3A\u6E05\u9664\uFF08Sweep\uFF09\u9636\u6BB5\uFF0C\u5373\u56DE\u6536\u5668\u68C0\u67E5\u5806\u4E2D\u6BCF\u4E00\u4E2A\u5BF9\u8C61\uFF0C\u5E76\u5C06\u6240\u6709\u672A\u88AB\u6807\u8BB0\u7684\u5BF9\u8C61\u8FDB\u884C\u56DE\u6536\uFF0C\u6574\u4E2A\u8FC7\u7A0B\u4E0D\u4F1A\u53D1\u751F\u5BF9\u8C61\u79FB\u52A8\u3002\u6574\u4E2A\u7B97\u6CD5\u5728\u4E0D\u540C\u7684\u5B9E\u73B0\u4E2D\u4F1A\u4F7F\u7528\u4E09\u8272\u62BD\u8C61\uFF08Tricolour Abstraction\uFF09\u3001\u4F4D\u56FE\u6807\u8BB0\uFF08BitMap\uFF09\u7B49\u6280\u672F\u6765\u63D0\u9AD8\u7B97\u6CD5\u7684\u6548\u7387\uFF0C\u5B58\u6D3B\u5BF9\u8C61\u8F83\u591A\u65F6\u8F83\u9AD8\u6548\u3002</p></li><li><p>**Mark-Compact \uFF08\u6807\u8BB0-\u6574\u7406\uFF09\uFF1A**\u8FD9\u4E2A\u7B97\u6CD5\u7684\u4E3B\u8981\u76EE\u7684\u5C31\u662F\u89E3\u51B3\u5728\u975E\u79FB\u52A8\u5F0F\u56DE\u6536\u5668\u4E2D\u90FD\u4F1A\u5B58\u5728\u7684\u788E\u7247\u5316\u95EE\u9898\uFF0C\u4E5F\u5206\u4E3A\u4E24\u4E2A\u9636\u6BB5\uFF0C\u7B2C\u4E00\u9636\u6BB5\u4E0E Mark-Sweep \u7C7B\u4F3C\uFF0C\u7B2C\u4E8C\u9636\u6BB5\u5219\u4F1A\u5BF9\u5B58\u6D3B\u5BF9\u8C61\u6309\u7167\u6574\u7406\u987A\u5E8F\uFF08Compaction Order\uFF09\u8FDB\u884C\u6574\u7406\u3002\u4E3B\u8981\u5B9E\u73B0\u6709\u53CC\u6307\u9488\uFF08Two-Finger\uFF09\u56DE\u6536\u7B97\u6CD5\u3001\u6ED1\u52A8\u56DE\u6536\uFF08Lisp2\uFF09\u7B97\u6CD5\u548C\u5F15\u7EBF\u6574\u7406\uFF08Threaded Compaction\uFF09\u7B97\u6CD5\u7B49\u3002</p></li><li><p>**Copying\uFF08\u590D\u5236\uFF09\uFF1A**\u5C06\u7A7A\u95F4\u5206\u4E3A\u4E24\u4E2A\u5927\u5C0F\u76F8\u540C\u7684 From \u548C To \u4E24\u4E2A\u534A\u533A\uFF0C\u540C\u4E00\u65F6\u95F4\u53EA\u4F1A\u4F7F\u7528\u5176\u4E2D\u4E00\u4E2A\uFF0C\u6BCF\u6B21\u8FDB\u884C\u56DE\u6536\u65F6\u5C06\u4E00\u4E2A\u534A\u533A\u7684\u5B58\u6D3B\u5BF9\u8C61\u901A\u8FC7\u590D\u5236\u7684\u65B9\u5F0F\u8F6C\u79FB\u5230\u53E6\u4E00\u4E2A\u534A\u533A\u3002\u6709\u9012\u5F52\uFF08Robert R. Fenichel \u548C Jerome C. Yochelson\u63D0\u51FA\uFF09\u548C\u8FED\u4EE3\uFF08Cheney \u63D0\u51FA\uFF09\u7B97\u6CD5\uFF0C\u4EE5\u53CA\u89E3\u51B3\u4E86\u524D\u4E24\u8005\u9012\u5F52\u6808\u3001\u7F13\u5B58\u884C\u7B49\u95EE\u9898\u7684\u8FD1\u4F3C\u4F18\u5148\u641C\u7D22\u7B97\u6CD5\u3002\u590D\u5236\u7B97\u6CD5\u53EF\u4EE5\u901A\u8FC7\u78B0\u649E\u6307\u9488\u7684\u65B9\u5F0F\u8FDB\u884C\u5FEB\u901F\u5730\u5206\u914D\u5185\u5B58\uFF0C\u4F46\u662F\u4E5F\u5B58\u5728\u7740\u7A7A\u95F4\u5229\u7528\u7387\u4E0D\u9AD8\u7684\u7F3A\u70B9\uFF0C\u53E6\u5916\u5C31\u662F\u5B58\u6D3B\u5BF9\u8C61\u6BD4\u8F83\u5927\u65F6\u590D\u5236\u7684\u6210\u672C\u6BD4\u8F83\u9AD8\u3002</p></li></ul><p>\u4E09\u79CD\u7B97\u6CD5\u5728\u662F\u5426\u79FB\u52A8\u5BF9\u8C61\u3001\u7A7A\u95F4\u548C\u65F6\u95F4\u65B9\u9762\u7684\u4E00\u4E9B\u5BF9\u6BD4\uFF0C\u5047\u8BBE\u5B58\u6D3B\u5BF9\u8C61\u6570\u91CF\u4E3A\xA0<em>L</em>\u3001\u5806\u7A7A\u95F4\u5927\u5C0F\u4E3A\xA0<em>H</em>\uFF0C\u5219\uFF1A</p><p><img src="https://upload-images.jianshu.io/upload_images/1179389-03f497067b9ff350?imageMogr2/auto-orient/strip|imageView2/2/w/1240" alt=""></p><p>\u628A mark\u3001sweep\u3001compaction\u3001copying \u8FD9\u51E0\u79CD\u52A8\u4F5C\u7684\u8017\u65F6\u653E\u5728\u4E00\u8D77\u770B\uFF0C\u5927\u81F4\u6709\u8FD9\u6837\u7684\u5173\u7CFB\uFF1A</p><p><img src="https://upload-images.jianshu.io/upload_images/1179389-a1c69e01cb02c636?imageMogr2/auto-orient/strip|imageView2/2/w/1240" alt=""></p><p>\u867D\u7136 compaction \u4E0E copying \u90FD\u6D89\u53CA\u79FB\u52A8\u5BF9\u8C61\uFF0C\u4F46\u53D6\u51B3\u4E8E\u5177\u4F53\u7B97\u6CD5\uFF0Ccompaction \u53EF\u80FD\u8981\u5148\u8BA1\u7B97\u4E00\u6B21\u5BF9\u8C61\u7684\u76EE\u6807\u5730\u5740\uFF0C\u7136\u540E\u4FEE\u6B63\u6307\u9488\uFF0C\u6700\u540E\u518D\u79FB\u52A8\u5BF9\u8C61\u3002copying \u5219\u53EF\u4EE5\u628A\u8FD9\u51E0\u4EF6\u4E8B\u60C5\u5408\u4E3A\u4E00\u4F53\u6765\u505A\uFF0C\u6240\u4EE5\u53EF\u4EE5\u5FEB\u4E00\u4E9B\u3002\u53E6\u5916\uFF0C\u8FD8\u9700\u8981\u7559\u610F GC \u5E26\u6765\u7684\u5F00\u9500\u4E0D\u80FD\u53EA\u770B Collector \u7684\u8017\u65F6\uFF0C\u8FD8\u5F97\u770B Allocator \u3002\u5982\u679C\u80FD\u4FDD\u8BC1\u5185\u5B58\u6CA1\u788E\u7247\uFF0C\u5206\u914D\u5C31\u53EF\u4EE5\u7528 pointer bumping \u65B9\u5F0F\uFF0C\u53EA\u9700\u8981\u632A\u4E00\u4E2A\u6307\u9488\u5C31\u5B8C\u6210\u4E86\u5206\u914D\uFF0C\u975E\u5E38\u5FEB\u3002\u800C\u5982\u679C\u5185\u5B58\u6709\u788E\u7247\u5C31\u5F97\u7528 freelist \u4E4B\u7C7B\u7684\u65B9\u5F0F\u7BA1\u7406\uFF0C\u5206\u914D\u901F\u5EA6\u901A\u5E38\u4F1A\u6162\u4E00\u4E9B\u3002</p><p><strong>2.5 \u6536\u96C6\u5668</strong></p>',21),_=i("\u76EE\u524D\u5728 Hotspot VM \u4E2D\u4E3B\u8981\u6709\u5206\u4EE3\u6536\u96C6\u548C\u5206\u533A\u6536\u96C6\u4E24\u5927\u7C7B\uFF0C\u5177\u4F53\u53EF\u4EE5\u770B\u4E0B\u9762\u7684\u8FD9\u4E2A\u56FE\uFF0C\u4E0D\u8FC7\u672A\u6765\u4F1A\u9010\u6E10\u5411\u5206\u533A\u6536\u96C6\u53D1\u5C55\u3002\u5728\u7F8E\u56E2\u5185\u90E8\uFF0C\u6709\u90E8\u5206\u4E1A\u52A1\u5C1D\u8BD5\u7528\u4E86 ZGC\uFF08\u611F\u5174\u8DA3\u7684\u540C\u5B66\u53EF\u4EE5\u5B66\u4E60\u4E0B\u8FD9\u7BC7\u6587\u7AE0\u300A"),C={href:"http://mp.weixin.qq.com/s?__biz=MjM5NjQ5MTI5OA==&mid=2651752559&idx=1&sn=c720b67e93db1885d72dab8799bba78c&chksm=bd1251228a65d834db610deb2ce55003e0fc1f90793e84873096db19027936f6add301242545&scene=21#wechat_redirect",target:"_blank",rel:"noopener noreferrer"},h=i("\u65B0\u4E00\u4EE3\u5783\u573E\u56DE\u6536\u5668ZGC\u7684\u63A2\u7D22\u4E0E\u5B9E\u8DF5"),M=i("\u300B\uFF09\uFF0C\u5176\u4F59\u57FA\u672C\u90FD\u505C\u7559\u5728 CMS \u548C G1 \u4E0A\u3002\u53E6\u5916\u5728 JDK11 \u540E\u63D0\u4F9B\u4E86\u4E00\u4E2A\u4E0D\u6267\u884C\u4EFB\u4F55\u5783\u573E\u56DE\u6536\u52A8\u4F5C\u7684\u56DE\u6536\u5668 Epsilon\uFF08A No-Op Garbage Collector\uFF09\u7528\u4F5C\u6027\u80FD\u5206\u6790\u3002\u53E6\u5916\u4E00\u4E2A\u5C31\u662F Azul \u7684 Zing JVM\uFF0C\u5176 C4\uFF08Concurrent Continuously Compacting Collector\uFF09\u6536\u96C6\u5668\u4E5F\u5728\u4E1A\u5185\u6709\u4E00\u5B9A\u7684\u5F71\u54CD\u529B\u3002"),f=e("p",null,[e("img",{src:"https://upload-images.jianshu.io/upload_images/1179389-6c3339b84c2861cf?imageMogr2/auto-orient/strip|imageView2/2/w/1240",alt:""})],-1),G=e("p",null,"\u5907\u6CE8\uFF1A\u503C\u5F97\u4E00\u63D0\u7684\u662F\uFF0C\u65E9\u4E9B\u5E74\u56FD\u5185 GC \u6280\u672F\u7684\u5E03\u9053\u8005 RednaxelaFX \uFF08\u6C5F\u6E56\u4EBA\u79F0 R \u5927\uFF09\u66FE\u5C31\u804C\u4E8E Azul\uFF0C\u672C\u6587\u7684\u4E00\u90E8\u5206\u6750\u6599\u4E5F\u53C2\u8003\u4E86\u4ED6\u7684\u4E00\u4E9B\u6587\u7AE0\u3002",-1),S=e("p",null,[e("strong",null,"2.5.1 \u5206\u4EE3\u6536\u96C6\u5668")],-1),y=e("li",null,[e("p",null,[i("**ParNew\uFF1A**\u4E00\u6B3E\u591A\u7EBF\u7A0B\u7684\u6536\u96C6\u5668\uFF0C\u91C7\u7528\u590D\u5236\u7B97\u6CD5\uFF0C\u4E3B\u8981\u5DE5\u4F5C\u5728 Young \u533A\uFF0C\u53EF\u4EE5\u901A\u8FC7\xA0"),e("code",null,"-XX:ParallelGCThreads"),i("\xA0\u53C2\u6570\u6765\u63A7\u5236\u6536\u96C6\u7684\u7EBF\u7A0B\u6570\uFF0C\u6574\u4E2A\u8FC7\u7A0B\u90FD\u662F STW \u7684\uFF0C\u5E38\u4E0E CMS \u7EC4\u5408\u4F7F\u7528\u3002")])],-1),k=i("**CMS\uFF1A**\u4EE5\u83B7\u53D6\u6700\u77ED\u56DE\u6536\u505C\u987F\u65F6\u95F4\u4E3A\u76EE\u6807\uFF0C\u91C7\u7528\u201C\u6807\u8BB0-\u6E05\u9664\u201D\u7B97\u6CD5\uFF0C\u5206 4 \u5927\u6B65\u8FDB\u884C\u5783\u573E\u6536\u96C6\uFF0C\u5176\u4E2D\u521D\u59CB\u6807\u8BB0\u548C\u91CD\u65B0\u6807\u8BB0\u4F1A STW \uFF0C\u591A\u6570\u5E94\u7528\u4E8E\u4E92\u8054\u7F51\u7AD9\u6216\u8005 B/S \u7CFB\u7EDF\u7684\u670D\u52A1\u5668\u7AEF\u4E0A\uFF0CJDK9 \u88AB\u6807\u8BB0\u5F03\u7528\uFF0CJDK14 \u88AB\u5220\u9664\uFF0C\u8BE6\u60C5\u53EF\u89C1\xA0"),q={href:"https://openjdk.java.net/jeps/363",target:"_blank",rel:"noopener noreferrer"},w=i("JEP 363"),T=i("\u3002"),x=l('<h4 id="_2-5-2-\u5206\u533A\u6536\u96C6\u5668" tabindex="-1"><a class="header-anchor" href="#_2-5-2-\u5206\u533A\u6536\u96C6\u5668" aria-hidden="true">#</a> 2.5.2 \u5206\u533A\u6536\u96C6\u5668</h4><ul><li><p>**G1\uFF1A**\u4E00\u79CD\u670D\u52A1\u5668\u7AEF\u7684\u5783\u573E\u6536\u96C6\u5668\uFF0C\u5E94\u7528\u5728\u591A\u5904\u7406\u5668\u548C\u5927\u5BB9\u91CF\u5185\u5B58\u73AF\u5883\u4E2D\uFF0C\u5728\u5B9E\u73B0\u9AD8\u541E\u5410\u91CF\u7684\u540C\u65F6\uFF0C\u5C3D\u53EF\u80FD\u5730\u6EE1\u8DB3\u5783\u573E\u6536\u96C6\u6682\u505C\u65F6\u95F4\u7684\u8981\u6C42\u3002</p></li><li><p>**ZGC\uFF1A**JDK11 \u4E2D\u63A8\u51FA\u7684\u4E00\u6B3E\u4F4E\u5EF6\u8FDF\u5783\u573E\u56DE\u6536\u5668\uFF0C\u9002\u7528\u4E8E\u5927\u5185\u5B58\u4F4E\u5EF6\u8FDF\u670D\u52A1\u7684\u5185\u5B58\u7BA1\u7406\u548C\u56DE\u6536\uFF0CSPECjbb 2015 \u57FA\u51C6\u6D4B\u8BD5\uFF0C\u5728 128G \u7684\u5927\u5806\u4E0B\uFF0C\u6700\u5927\u505C\u987F\u65F6\u95F4\u624D 1.68 ms\uFF0C\u505C\u987F\u65F6\u95F4\u8FDC\u80DC\u4E8E G1 \u548C CMS\u3002</p></li><li><p>**Shenandoah\uFF1A**\u7531 Red Hat \u7684\u4E00\u4E2A\u56E2\u961F\u8D1F\u8D23\u5F00\u53D1\uFF0C\u4E0E G1 \u7C7B\u4F3C\uFF0C\u57FA\u4E8E Region \u8BBE\u8BA1\u7684\u5783\u573E\u6536\u96C6\u5668\uFF0C\u4F46\u4E0D\u9700\u8981 Remember Set \u6216\u8005 Card Table \u6765\u8BB0\u5F55\u8DE8 Region \u5F15\u7528\uFF0C\u505C\u987F\u65F6\u95F4\u548C\u5806\u7684\u5927\u5C0F\u6CA1\u6709\u4EFB\u4F55\u5173\u7CFB\u3002\u505C\u987F\u65F6\u95F4\u4E0E ZGC \u63A5\u8FD1\uFF0C\u4E0B\u56FE\u4E3A\u4E0E CMS \u548C G1 \u7B49\u6536\u96C6\u5668\u7684 benchmark\u3002</p></li></ul><p><img src="https://upload-images.jianshu.io/upload_images/1179389-238d04be0f931ddc?imageMogr2/auto-orient/strip|imageView2/2/w/1240" alt=""></p><p><strong>2.5.3 \u5E38\u7528\u6536\u96C6\u5668</strong></p><p>\u76EE\u524D\u4F7F\u7528\u6700\u591A\u7684\u662F CMS \u548C G1 \u6536\u96C6\u5668\uFF0C\u4E8C\u8005\u90FD\u6709\u5206\u4EE3\u7684\u6982\u5FF5\uFF0C\u4E3B\u8981\u5185\u5B58\u7ED3\u6784\u5982\u4E0B\uFF1A</p><p><img src="https://upload-images.jianshu.io/upload_images/1179389-8082240b37153163.gif?imageMogr2/auto-orient/strip|imageView2/2/w/1240" alt=""></p><p><strong>2.5.4 \u5176\u4ED6\u6536\u96C6\u5668</strong></p><p>\u4EE5\u4E0A\u4EC5\u5217\u51FA\u5E38\u89C1\u6536\u96C6\u5668\uFF0C\u9664\u6B64\u4E4B\u5916\u8FD8\u6709\u5F88\u591A\uFF0C\u5982 Metronome\u3001Stopless\u3001Staccato\u3001Chicken\u3001Clover \u7B49\u5B9E\u65F6\u56DE\u6536\u5668\uFF0CSapphire\u3001Compressor\u3001Pauseless \u7B49\u5E76\u53D1\u590D\u5236/\u6574\u7406\u56DE\u6536\u5668\uFF0CDoligez-Leroy-Conthier \u7B49\u6807\u8BB0\u6574\u7406\u56DE\u6536\u5668\uFF0C\u7531\u4E8E\u7BC7\u5E45\u539F\u56E0\uFF0C\u4E0D\u5728\u6B64\u4E00\u4E00\u4ECB\u7ECD\u3002</p><p><strong>2.6 \u5E38\u7528\u5DE5\u5177</strong></p><p>\u5DE5\u6B32\u5584\u5176\u4E8B\uFF0C\u5FC5\u5148\u5229\u5176\u5668\uFF0C\u6B64\u5904\u5217\u51FA\u4E00\u4E9B\u7B14\u8005\u5E38\u7528\u7684\u5DE5\u5177\uFF0C\u5177\u4F53\u60C5\u51B5\u5927\u5BB6\u53EF\u4EE5\u81EA\u7531\u9009\u62E9\uFF0C\u672C\u6587\u7684\u95EE\u9898\u90FD\u662F\u4F7F\u7528\u8FD9\u4E9B\u5DE5\u5177\u6765\u5B9A\u4F4D\u548C\u5206\u6790\u7684\u3002</p><p><strong>2.6.1 \u547D\u4EE4\u884C\u7EC8\u7AEF</strong></p><ul><li><p><strong>\u6807\u51C6\u7EC8\u7AEF\u7C7B</strong>\uFF1Ajps\u3001jinfo\u3001jstat\u3001jstack\u3001jmap</p></li><li><p><strong>\u529F\u80FD\u6574\u5408\u7C7B</strong>\uFF1Ajcmd\u3001vjtools\u3001arthas\u3001greys</p></li></ul><p><strong>2.6.2 \u53EF\u89C6\u5316\u754C\u9762</strong></p><ul><li><p><strong>\u7B80\u6613</strong>\uFF1AJConsole\u3001JVisualvm\u3001HA\u3001GCHisto\u3001GCViewer</p></li><li><p><strong>\u8FDB\u9636</strong>\uFF1AMAT\u3001JProfiler</p></li></ul>',14),O=i("\u547D\u4EE4\u884C\u63A8\u8350 arthas \uFF0C\u53EF\u89C6\u5316\u754C\u9762\u63A8\u8350 JProfiler\uFF0C\u6B64\u5916\u8FD8\u6709\u4E00\u4E9B\u5728\u7EBF\u7684\u5E73\u53F0\xA0"),I={href:"https://gceasy.io/",target:"_blank",rel:"noopener noreferrer"},R=i("gceasy"),z=i("\u3001"),F={href:"https://heaphero.io/",target:"_blank",rel:"noopener noreferrer"},N=i("heaphero"),J=i("\u3001"),X={href:"https://fastthread.io/",target:"_blank",rel:"noopener noreferrer"},P=i("fastthread"),L=i("\xA0\uFF0C\u7F8E\u56E2\u5185\u90E8\u7684 Scalpel\uFF08\u4E00\u6B3E\u81EA\u7814\u7684 JVM \u95EE\u9898\u8BCA\u65AD\u5DE5\u5177\uFF0C\u6682\u65F6\u672A\u5F00\u6E90\uFF09\u4E5F\u6BD4\u8F83\u597D\u7528\u3002"),B=l(`<p><strong>3. GC \u95EE\u9898\u5224\u65AD</strong></p><p>\u5728\u505A GC \u95EE\u9898\u6392\u67E5\u548C\u4F18\u5316\u4E4B\u524D\uFF0C\u6211\u4EEC\u9700\u8981\u5148\u6765\u660E\u786E\u4E0B\u5230\u5E95\u662F\u4E0D\u662F GC \u76F4\u63A5\u5BFC\u81F4\u7684\u95EE\u9898\uFF0C\u6216\u8005\u5E94\u7528\u4EE3\u7801\u5BFC\u81F4\u7684 GC \u5F02\u5E38\uFF0C\u6700\u7EC8\u51FA\u73B0\u95EE\u9898\u3002</p><p><strong>3.1 \u5224\u65AD GC \u6709\u6CA1\u6709\u95EE\u9898\uFF1F</strong></p><p><strong>3.1.1 \u8BBE\u5B9A\u8BC4\u4EF7\u6807\u51C6</strong></p><p>\u8BC4\u5224 GC \u7684\u4E24\u4E2A\u6838\u5FC3\u6307\u6807\uFF1A</p><ul><li><p>**\u5EF6\u8FDF\uFF08Latency\uFF09\uFF1A**\u4E5F\u53EF\u4EE5\u7406\u89E3\u4E3A\u6700\u5927\u505C\u987F\u65F6\u95F4\uFF0C\u5373\u5783\u573E\u6536\u96C6\u8FC7\u7A0B\u4E2D\u4E00\u6B21 STW \u7684\u6700\u957F\u65F6\u95F4\uFF0C\u8D8A\u77ED\u8D8A\u597D\uFF0C\u4E00\u5B9A\u7A0B\u5EA6\u4E0A\u53EF\u4EE5\u63A5\u53D7\u9891\u6B21\u7684\u589E\u5927\uFF0CGC \u6280\u672F\u7684\u4E3B\u8981\u53D1\u5C55\u65B9\u5411\u3002</p></li><li><p>**\u541E\u5410\u91CF\uFF08Throughput\uFF09\uFF1A**\u5E94\u7528\u7CFB\u7EDF\u7684\u751F\u547D\u5468\u671F\u5185\uFF0C\u7531\u4E8E GC \u7EBF\u7A0B\u4F1A\u5360\u7528 Mutator \u5F53\u524D\u53EF\u7528\u7684 CPU \u65F6\u949F\u5468\u671F\uFF0C\u541E\u5410\u91CF\u5373\u4E3A Mutator \u6709\u6548\u82B1\u8D39\u7684\u65F6\u95F4\u5360\u7CFB\u7EDF\u603B\u8FD0\u884C\u65F6\u95F4\u7684\u767E\u5206\u6BD4\uFF0C\u4F8B\u5982\u7CFB\u7EDF\u8FD0\u884C\u4E86 100 min\uFF0CGC \u8017\u65F6 1 min\uFF0C\u5219\u7CFB\u7EDF\u541E\u5410\u91CF\u4E3A 99%\uFF0C\u541E\u5410\u91CF\u4F18\u5148\u7684\u6536\u96C6\u5668\u53EF\u4EE5\u63A5\u53D7\u8F83\u957F\u7684\u505C\u987F\u3002</p></li></ul><p>\u76EE\u524D\u5404\u5927\u4E92\u8054\u7F51\u516C\u53F8\u7684\u7CFB\u7EDF\u57FA\u672C\u90FD\u66F4\u8FFD\u6C42\u4F4E\u5EF6\u65F6\uFF0C\u907F\u514D\u4E00\u6B21 GC \u505C\u987F\u7684\u65F6\u95F4\u8FC7\u957F\u5BF9\u7528\u6237\u4F53\u9A8C\u9020\u6210\u635F\u5931\uFF0C\u8861\u91CF\u6307\u6807\u9700\u8981\u7ED3\u5408\u4E00\u4E0B\u5E94\u7528\u670D\u52A1\u7684 SLA\uFF0C\u4E3B\u8981\u5982\u4E0B\u4E24\u70B9\u6765\u5224\u65AD\uFF1A</p><p><img src="https://upload-images.jianshu.io/upload_images/1179389-0116d4ae68567826?imageMogr2/auto-orient/strip|imageView2/2/w/1240" alt=""></p><p>\u7B80\u800C\u8A00\u4E4B\uFF0C\u5373\u4E3A<strong>\u4E00\u6B21\u505C\u987F\u7684\u65F6\u95F4\u4E0D\u8D85\u8FC7\u5E94\u7528\u670D\u52A1\u7684 TP9999\uFF0CGC \u7684\u541E\u5410\u91CF\u4E0D\u5C0F\u4E8E 99.99%</strong>\u3002\u4E3E\u4E2A\u4F8B\u5B50\uFF0C\u5047\u8BBE\u67D0\u4E2A\u670D\u52A1 A \u7684 TP9999 \u4E3A 80 ms\uFF0C\u5E73\u5747 GC \u505C\u987F\u4E3A 30 ms\uFF0C\u90A3\u4E48\u8BE5\u670D\u52A1\u7684\u6700\u5927\u505C\u987F\u65F6\u95F4\u6700\u597D\u4E0D\u8981\u8D85\u8FC7 80 ms\uFF0CGC \u9891\u6B21\u63A7\u5236\u5728 5 min \u4EE5\u4E0A\u4E00\u6B21\u3002\u5982\u679C\u6EE1\u8DB3\u4E0D\u4E86\uFF0C\u90A3\u5C31\u9700\u8981\u8C03\u4F18\u6216\u8005\u901A\u8FC7\u66F4\u591A\u8D44\u6E90\u6765\u8FDB\u884C\u5E76\u8054\u5197\u4F59\u3002\uFF08\u5927\u5BB6\u53EF\u4EE5\u5148\u505C\u4E0B\u6765\uFF0C\u770B\u770B\u76D1\u63A7\u5E73\u53F0\u4E0A\u9762\u7684 gc.meantime \u5206\u949F\u7EA7\u522B\u6307\u6807\uFF0C\u5982\u679C\u8D85\u8FC7\u4E86 6 ms \u90A3\u5355\u673A GC \u541E\u5410\u91CF\u5C31\u8FBE\u4E0D\u5230 4 \u4E2A 9 \u4E86\u3002\uFF09</p><p>\u5907\u6CE8\uFF1A\u9664\u4E86\u8FD9\u4E24\u4E2A\u6307\u6807\u4E4B\u5916\u8FD8\u6709 Footprint\uFF08\u8D44\u6E90\u91CF\u5927\u5C0F\u6D4B\u91CF\uFF09\u3001\u53CD\u5E94\u901F\u5EA6\u7B49\u6307\u6807\uFF0C\u4E92\u8054\u7F51\u8FD9\u79CD\u5B9E\u65F6\u7CFB\u7EDF\u8FFD\u6C42\u4F4E\u5EF6\u8FDF\uFF0C\u800C\u5F88\u591A\u5D4C\u5165\u5F0F\u7CFB\u7EDF\u5219\u8FFD\u6C42 Footprint\u3002</p><p><strong>3.1.2 \u8BFB\u61C2 GC Cause</strong></p><p>\u62FF\u5230 GC \u65E5\u5FD7\uFF0C\u6211\u4EEC\u5C31\u53EF\u4EE5\u7B80\u5355\u5206\u6790 GC \u60C5\u51B5\u4E86\uFF0C\u901A\u8FC7\u4E00\u4E9B\u5DE5\u5177\uFF0C\u6211\u4EEC\u53EF\u4EE5\u6BD4\u8F83\u76F4\u89C2\u5730\u770B\u5230 Cause \u7684\u5206\u5E03\u60C5\u51B5\uFF0C\u5982\u4E0B\u56FE\u5C31\u662F\u4F7F\u7528 gceasy \u7ED8\u5236\u7684\u56FE\u8868\uFF1A</p><p><img src="https://upload-images.jianshu.io/upload_images/1179389-955a1b25ed4cf223?imageMogr2/auto-orient/strip|imageView2/2/w/1240" alt=""></p><p>\u5982\u4E0A\u56FE\u6240\u793A\uFF0C\u6211\u4EEC\u5F88\u6E05\u6670\u7684\u5C31\u80FD\u77E5\u9053\u662F\u4EC0\u4E48\u539F\u56E0\u5F15\u8D77\u7684 GC\uFF0C\u4EE5\u53CA\u6BCF\u6B21\u7684\u65F6\u95F4\u82B1\u8D39\u60C5\u51B5\uFF0C\u4F46\u662F\u8981\u5206\u6790 GC \u7684\u95EE\u9898\uFF0C\u5148\u8981\u8BFB\u61C2 GC Cause\uFF0C\u5373 JVM \u4EC0\u4E48\u6837\u7684\u6761\u4EF6\u4E0B\u9009\u62E9\u8FDB\u884C GC \u64CD\u4F5C\uFF0C\u5177\u4F53 Cause \u7684\u5206\u7C7B\u53EF\u4EE5\u770B\u4E00\u4E0B Hotspot \u6E90\u7801\uFF1Asrc/share/vm/gc/shared/gcCause.hpp \u548C src/share/vm/gc/shared/gcCause.cpp \u4E2D\u3002</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>const char* GCCause::to_string(GCCause::Cause cause) {
   switch (cause) {
     case _java_lang_system_gc:
       return &quot;System.gc()&quot;;
diff --git a/dist/assets/method.html.67a1e169.js b/dist/assets/method.html.1f147cbd.js
similarity index 99%
rename from dist/assets/method.html.67a1e169.js
rename to dist/assets/method.html.1f147cbd.js
index ba86500b..2264fdf3 100644
--- a/dist/assets/method.html.67a1e169.js
+++ b/dist/assets/method.html.1f147cbd.js
@@ -1,4 +1,4 @@
-import{_ as t}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o,c,a as n,b as e,d as s,e as i}from"./app.a0271b9c.js";const l={},u=n("h1",{id:"java\u65B9\u6CD5",tabindex:"-1"},[n("a",{class:"header-anchor",href:"#java\u65B9\u6CD5","aria-hidden":"true"},"#"),s(" Java\u65B9\u6CD5")],-1),d=s("\u201C\u4E8C\u54E5\uFF0C"),r={href:"https://mp.weixin.qq.com/s/UExby8GP3kSacCXliQw8pQ",target:"_blank",rel:"noopener noreferrer"},k=s("\u4E0A\u4E00\u8282"),v=s("\u5B66\u4E86\u5BF9\u8C61\u548C\u7C7B\uFF0C\u8FD9\u4E00\u8282\u6211\u4EEC\u5B66\u4EC0\u4E48\u5462\uFF1F\u201D\u4E09\u59B9\u6EE1\u662F\u671F\u5F85\u7684\u95EE\u6211\u3002"),m=n("p",null,"\u201C\u8FD9\u4E00\u8282\u6211\u4EEC\u6765\u4E86\u89E3\u4E00\u4E0B Java \u4E2D\u7684\u65B9\u6CD5\u2014\u2014\u4EC0\u4E48\u662F\u65B9\u6CD5\uFF1F\u5982\u4F55\u58F0\u660E\u65B9\u6CD5\uFF1F\u65B9\u6CD5\u6709\u54EA\u51E0\u79CD\uFF1F\u4EC0\u4E48\u662F\u5B9E\u4F8B\u65B9\u6CD5\uFF1F\u4EC0\u4E48\u662F\u62BD\u8C61\u65B9\u6CD5\uFF1F\u201D\u6211\u7B11\u7740\u5BF9\u4E09\u59B9\u8BF4\uFF0C\u201C\u6211\u5F00\u59CB\u4E86\u554A\uFF0C\u4F60\u4E0D\u8981\u95EA\u554A\u3002\u201D",-1),b=n("h3",{id:"_01\u3001java-\u4E2D\u7684\u65B9\u6CD5\u662F\u4EC0\u4E48",tabindex:"-1"},[n("a",{class:"header-anchor",href:"#_01\u3001java-\u4E2D\u7684\u65B9\u6CD5\u662F\u4EC0\u4E48","aria-hidden":"true"},"#"),s(" 01\u3001Java \u4E2D\u7684\u65B9\u6CD5\u662F\u4EC0\u4E48\uFF1F")],-1),g=n("p",null,"\u65B9\u6CD5\u7528\u6765\u5B9E\u73B0\u4EE3\u7801\u7684\u53EF\u91CD\u7528\u6027\uFF0C\u6211\u4EEC\u7F16\u5199\u4E00\u6B21\u65B9\u6CD5\uFF0C\u5E76\u591A\u6B21\u4F7F\u7528\u5B83\u3002\u901A\u8FC7\u589E\u52A0\u6216\u8005\u5220\u9664\u65B9\u6CD5\u4E2D\u7684\u4E00\u90E8\u5206\u4EE3\u7801\uFF0C\u5C31\u53EF\u4EE5\u63D0\u9AD8\u6574\u4F53\u4EE3\u7801\u7684\u53EF\u8BFB\u6027\u3002",-1),y=n("p",null,[s("\u53EA\u6709\u65B9\u6CD5\u88AB\u8C03\u7528\u65F6\uFF0C\u5B83\u624D\u4F1A\u6267\u884C\u3002Java \u4E2D\u6700\u6709\u540D\u7684\u65B9\u6CD5\u5F53\u5C5E "),n("code",null,"main()"),s(" \u65B9\u6CD5\uFF0C\u70B9\u51FB\u4E0B\u9762\u7684\u94FE\u63A5\u53EF\u4EE5\u9605\u8BFB\u66F4\u591A\u5173\u4E8E "),n("code",null,"main()"),s(" \u65B9\u6CD5\u7684\u77E5\u8BC6\u70B9\u3002")],-1),h={href:"https://mp.weixin.qq.com/s/191I_2CVOxVuyfLVtb4jhg",target:"_blank",rel:"noopener noreferrer"},w=s("\u96F6\u57FA\u7840\u5B66 Java \u7B2C 4 \u8BB2\uFF1AHello World"),f=i(`<h3 id="_02\u3001\u5982\u4F55\u58F0\u660E\u65B9\u6CD5" tabindex="-1"><a class="header-anchor" href="#_02\u3001\u5982\u4F55\u58F0\u660E\u65B9\u6CD5" aria-hidden="true">#</a> 02\u3001\u5982\u4F55\u58F0\u660E\u65B9\u6CD5\uFF1F</h3><p>\u65B9\u6CD5\u7684\u58F0\u660E\u53CD\u6620\u4E86\u65B9\u6CD5\u7684\u4E00\u4E9B\u4FE1\u606F\uFF0C\u6BD4\u5982\u8BF4\u53EF\u89C1\u6027\u3001\u8FD4\u56DE\u7C7B\u578B\u3001\u65B9\u6CD5\u540D\u548C\u53C2\u6570\u3002\u5982\u4E0B\u56FE\u6240\u793A\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/object-class/17-01.png" alt=""></p><p><strong>\u8BBF\u95EE\u6743\u9650</strong>\uFF1A\u5B83\u6307\u5B9A\u4E86\u65B9\u6CD5\u7684\u53EF\u89C1\u6027\u3002Java \u63D0\u4F9B\u4E86\u56DB\u79CD\u8BBF\u95EE\u6743\u9650\u4FEE\u9970\u7B26\uFF1A</p><ul><li>public\uFF1A\u8BE5\u65B9\u6CD5\u53EF\u4EE5\u88AB\u6240\u6709\u7C7B\u8BBF\u95EE\u3002</li><li>private\uFF1A\u8BE5\u65B9\u6CD5\u53EA\u80FD\u5728\u5B9A\u4E49\u5B83\u7684\u7C7B\u4E2D\u8BBF\u95EE\u3002</li><li>protected\uFF1A\u8BE5\u65B9\u6CD5\u53EF\u4EE5\u88AB\u540C\u4E00\u4E2A\u5305\u4E2D\u7684\u7C7B\uFF0C\u6216\u8005\u4E0D\u540C\u5305\u4E2D\u7684\u5B50\u7C7B\u8BBF\u95EE\u3002</li><li>default\uFF1A\u8BE5\u65B9\u6CD5\u5982\u679C\u6CA1\u6709\u4F7F\u7528\u4EFB\u4F55\u8BBF\u95EE\u6743\u9650\u4FEE\u9970\u7B26\uFF0CJava \u9ED8\u8BA4\u5B83\u4F7F\u7528 default \u4FEE\u9970\u7B26\uFF0C\u8BE5\u65B9\u6CD5\u53EA\u80FD\u88AB\u540C\u4E00\u4E2A\u5305\u4E2D\u7C7B\u53EF\u89C1\u3002</li></ul><p><strong>\u8FD4\u56DE\u7C7B\u578B</strong>\uFF1A\u65B9\u6CD5\u8FD4\u56DE\u7684\u6570\u636E\u7C7B\u578B\uFF0C\u53EF\u4EE5\u662F\u57FA\u672C\u6570\u636E\u7C7B\u578B\u3001\u5BF9\u8C61\u548C\u96C6\u5408\uFF0C\u5982\u679C\u4E0D\u9700\u8981\u8FD4\u56DE\u6570\u636E\uFF0C\u5219\u4F7F\u7528 void \u5173\u952E\u5B57\u3002</p><p><strong>\u65B9\u6CD5\u540D</strong>\uFF1A\u65B9\u6CD5\u540D\u6700\u597D\u53CD\u5E94\u51FA\u65B9\u6CD5\u7684\u529F\u80FD\uFF0C\u6BD4\u5982\uFF0C\u6211\u4EEC\u8981\u521B\u5EFA\u4E00\u4E2A\u5C06\u4E24\u4E2A\u6570\u5B57\u76F8\u51CF\u7684\u65B9\u6CD5\uFF0C\u90A3\u4E48\u65B9\u6CD5\u540D\u6700\u597D\u662F subtract\u3002</p><p>\u65B9\u6CD5\u540D\u6700\u597D\u662F\u4E00\u4E2A\u52A8\u8BCD\uFF0C\u5E76\u4E14\u4EE5\u5C0F\u5199\u5B57\u6BCD\u5F00\u5934\u3002\u5982\u679C\u65B9\u6CD5\u540D\u5305\u542B\u4E24\u4E2A\u4EE5\u4E0A\u5355\u8BCD\uFF0C\u90A3\u4E48\u7B2C\u4E00\u4E2A\u5355\u8BCD\u6700\u597D\u662F\u52A8\u8BCD\uFF0C\u7136\u540E\u662F\u5F62\u5BB9\u8BCD\u6216\u8005\u540D\u8BCD\uFF0C\u5E76\u4E14\u8981\u4EE5\u9A7C\u5CF0\u5F0F\u7684\u547D\u540D\u65B9\u5F0F\u547D\u540D\u3002\u6BD4\u5982\uFF1A</p><ul><li>\u4E00\u4E2A\u5355\u8BCD\u7684\u65B9\u6CD5\u540D\uFF1A<code>sum()</code></li><li>\u591A\u4E2A\u5355\u8BCD\u7684\u65B9\u6CD5\u540D\uFF1A<code>stringComparision()</code></li></ul><p>\u4E00\u4E2A\u65B9\u6CD5\u53EF\u80FD\u4E0E\u540C\u4E00\u4E2A\u7C7B\u4E2D\u7684\u53E6\u5916\u4E00\u4E2A\u65B9\u6CD5\u540C\u540D\uFF0C\u8FD9\u88AB\u79F0\u4E3A\u65B9\u6CD5\u91CD\u8F7D\u3002</p><p><strong>\u53C2\u6570</strong>\uFF1A\u53C2\u6570\u88AB\u653E\u5728\u4E00\u4E2A\u5706\u62EC\u53F7\u5185\uFF0C\u5982\u679C\u6709\u591A\u4E2A\u53C2\u6570\uFF0C\u53EF\u4EE5\u4F7F\u7528\u9017\u53F7\u9694\u5F00\u3002\u53C2\u6570\u5305\u542B\u4E24\u4E2A\u90E8\u5206\uFF0C\u53C2\u6570\u7C7B\u578B\u548C\u53C2\u6570\u540D\u3002\u5982\u679C\u65B9\u6CD5\u6CA1\u6709\u53C2\u6570\uFF0C\u5706\u62EC\u53F7\u662F\u7A7A\u7684\u3002</p><p><strong>\u65B9\u6CD5\u7B7E\u540D</strong>\uFF1A\u6BCF\u4E00\u4E2A\u65B9\u6CD5\u90FD\u6709\u4E00\u4E2A\u7B7E\u540D\uFF0C\u5305\u62EC\u65B9\u6CD5\u540D\u548C\u53C2\u6570\u3002</p><p><strong>\u65B9\u6CD5\u4F53</strong>\uFF1A\u65B9\u6CD5\u4F53\u653E\u5728\u4E00\u5BF9\u82B1\u62EC\u53F7\u5185\uFF0C\u628A\u4E00\u4E9B\u4EE3\u7801\u653E\u5728\u4E00\u8D77\uFF0C\u7528\u6765\u6267\u884C\u7279\u5B9A\u7684\u4EFB\u52A1\u3002</p><h3 id="_02\u3001\u65B9\u6CD5\u6709\u54EA\u51E0\u79CD" tabindex="-1"><a class="header-anchor" href="#_02\u3001\u65B9\u6CD5\u6709\u54EA\u51E0\u79CD" aria-hidden="true">#</a> 02\u3001\u65B9\u6CD5\u6709\u54EA\u51E0\u79CD\uFF1F</h3><p>\u65B9\u6CD5\u53EF\u4EE5\u5206\u4E3A\u4E24\u79CD\uFF0C\u4E00\u79CD\u53EB\u9884\u5148\u5B9A\u4E49\u65B9\u6CD5\uFF0C\u4E00\u79CD\u53EB\u7528\u6237\u81EA\u5B9A\u4E49\u65B9\u6CD5\u3002</p><p><strong>1\uFF09\u9884\u5148\u5B9A\u4E49\u65B9\u6CD5</strong></p><p>Java \u63D0\u4F9B\u4E86\u5927\u91CF\u9884\u5148\u5B9A\u4E49\u597D\u7684\u65B9\u6CD5\u4F9B\u6211\u4EEC\u8C03\u7528\uFF0C\u4E5F\u79F0\u4E3A\u6807\u51C6\u7C7B\u5E93\u65B9\u6CD5\uFF0C\u6216\u8005\u5185\u7F6E\u65B9\u6CD5\u3002\u6BD4\u5982\u8BF4 String \u7C7B\u7684 <code>length()</code>\u3001<code>equals()</code>\u3001<code>compare()</code> \u65B9\u6CD5\uFF0C\u4EE5\u53CA\u6211\u4EEC\u5728\u521D\u5B66 Java \u9636\u6BB5\u6700\u5E38\u7528\u7684 <code>println()</code> \u65B9\u6CD5\uFF0C\u7528\u6765\u5728\u63A7\u5236\u53F0\u6253\u5370\u4FE1\u606F\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token doc-comment comment">/**
+import{_ as t}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o,c,a as n,b as e,d as s,e as i}from"./app.615e41d8.js";const l={},u=n("h1",{id:"java\u65B9\u6CD5",tabindex:"-1"},[n("a",{class:"header-anchor",href:"#java\u65B9\u6CD5","aria-hidden":"true"},"#"),s(" Java\u65B9\u6CD5")],-1),d=s("\u201C\u4E8C\u54E5\uFF0C"),r={href:"https://mp.weixin.qq.com/s/UExby8GP3kSacCXliQw8pQ",target:"_blank",rel:"noopener noreferrer"},k=s("\u4E0A\u4E00\u8282"),v=s("\u5B66\u4E86\u5BF9\u8C61\u548C\u7C7B\uFF0C\u8FD9\u4E00\u8282\u6211\u4EEC\u5B66\u4EC0\u4E48\u5462\uFF1F\u201D\u4E09\u59B9\u6EE1\u662F\u671F\u5F85\u7684\u95EE\u6211\u3002"),m=n("p",null,"\u201C\u8FD9\u4E00\u8282\u6211\u4EEC\u6765\u4E86\u89E3\u4E00\u4E0B Java \u4E2D\u7684\u65B9\u6CD5\u2014\u2014\u4EC0\u4E48\u662F\u65B9\u6CD5\uFF1F\u5982\u4F55\u58F0\u660E\u65B9\u6CD5\uFF1F\u65B9\u6CD5\u6709\u54EA\u51E0\u79CD\uFF1F\u4EC0\u4E48\u662F\u5B9E\u4F8B\u65B9\u6CD5\uFF1F\u4EC0\u4E48\u662F\u62BD\u8C61\u65B9\u6CD5\uFF1F\u201D\u6211\u7B11\u7740\u5BF9\u4E09\u59B9\u8BF4\uFF0C\u201C\u6211\u5F00\u59CB\u4E86\u554A\uFF0C\u4F60\u4E0D\u8981\u95EA\u554A\u3002\u201D",-1),b=n("h3",{id:"_01\u3001java-\u4E2D\u7684\u65B9\u6CD5\u662F\u4EC0\u4E48",tabindex:"-1"},[n("a",{class:"header-anchor",href:"#_01\u3001java-\u4E2D\u7684\u65B9\u6CD5\u662F\u4EC0\u4E48","aria-hidden":"true"},"#"),s(" 01\u3001Java \u4E2D\u7684\u65B9\u6CD5\u662F\u4EC0\u4E48\uFF1F")],-1),g=n("p",null,"\u65B9\u6CD5\u7528\u6765\u5B9E\u73B0\u4EE3\u7801\u7684\u53EF\u91CD\u7528\u6027\uFF0C\u6211\u4EEC\u7F16\u5199\u4E00\u6B21\u65B9\u6CD5\uFF0C\u5E76\u591A\u6B21\u4F7F\u7528\u5B83\u3002\u901A\u8FC7\u589E\u52A0\u6216\u8005\u5220\u9664\u65B9\u6CD5\u4E2D\u7684\u4E00\u90E8\u5206\u4EE3\u7801\uFF0C\u5C31\u53EF\u4EE5\u63D0\u9AD8\u6574\u4F53\u4EE3\u7801\u7684\u53EF\u8BFB\u6027\u3002",-1),y=n("p",null,[s("\u53EA\u6709\u65B9\u6CD5\u88AB\u8C03\u7528\u65F6\uFF0C\u5B83\u624D\u4F1A\u6267\u884C\u3002Java \u4E2D\u6700\u6709\u540D\u7684\u65B9\u6CD5\u5F53\u5C5E "),n("code",null,"main()"),s(" \u65B9\u6CD5\uFF0C\u70B9\u51FB\u4E0B\u9762\u7684\u94FE\u63A5\u53EF\u4EE5\u9605\u8BFB\u66F4\u591A\u5173\u4E8E "),n("code",null,"main()"),s(" \u65B9\u6CD5\u7684\u77E5\u8BC6\u70B9\u3002")],-1),h={href:"https://mp.weixin.qq.com/s/191I_2CVOxVuyfLVtb4jhg",target:"_blank",rel:"noopener noreferrer"},w=s("\u96F6\u57FA\u7840\u5B66 Java \u7B2C 4 \u8BB2\uFF1AHello World"),f=i(`<h3 id="_02\u3001\u5982\u4F55\u58F0\u660E\u65B9\u6CD5" tabindex="-1"><a class="header-anchor" href="#_02\u3001\u5982\u4F55\u58F0\u660E\u65B9\u6CD5" aria-hidden="true">#</a> 02\u3001\u5982\u4F55\u58F0\u660E\u65B9\u6CD5\uFF1F</h3><p>\u65B9\u6CD5\u7684\u58F0\u660E\u53CD\u6620\u4E86\u65B9\u6CD5\u7684\u4E00\u4E9B\u4FE1\u606F\uFF0C\u6BD4\u5982\u8BF4\u53EF\u89C1\u6027\u3001\u8FD4\u56DE\u7C7B\u578B\u3001\u65B9\u6CD5\u540D\u548C\u53C2\u6570\u3002\u5982\u4E0B\u56FE\u6240\u793A\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/object-class/17-01.png" alt=""></p><p><strong>\u8BBF\u95EE\u6743\u9650</strong>\uFF1A\u5B83\u6307\u5B9A\u4E86\u65B9\u6CD5\u7684\u53EF\u89C1\u6027\u3002Java \u63D0\u4F9B\u4E86\u56DB\u79CD\u8BBF\u95EE\u6743\u9650\u4FEE\u9970\u7B26\uFF1A</p><ul><li>public\uFF1A\u8BE5\u65B9\u6CD5\u53EF\u4EE5\u88AB\u6240\u6709\u7C7B\u8BBF\u95EE\u3002</li><li>private\uFF1A\u8BE5\u65B9\u6CD5\u53EA\u80FD\u5728\u5B9A\u4E49\u5B83\u7684\u7C7B\u4E2D\u8BBF\u95EE\u3002</li><li>protected\uFF1A\u8BE5\u65B9\u6CD5\u53EF\u4EE5\u88AB\u540C\u4E00\u4E2A\u5305\u4E2D\u7684\u7C7B\uFF0C\u6216\u8005\u4E0D\u540C\u5305\u4E2D\u7684\u5B50\u7C7B\u8BBF\u95EE\u3002</li><li>default\uFF1A\u8BE5\u65B9\u6CD5\u5982\u679C\u6CA1\u6709\u4F7F\u7528\u4EFB\u4F55\u8BBF\u95EE\u6743\u9650\u4FEE\u9970\u7B26\uFF0CJava \u9ED8\u8BA4\u5B83\u4F7F\u7528 default \u4FEE\u9970\u7B26\uFF0C\u8BE5\u65B9\u6CD5\u53EA\u80FD\u88AB\u540C\u4E00\u4E2A\u5305\u4E2D\u7C7B\u53EF\u89C1\u3002</li></ul><p><strong>\u8FD4\u56DE\u7C7B\u578B</strong>\uFF1A\u65B9\u6CD5\u8FD4\u56DE\u7684\u6570\u636E\u7C7B\u578B\uFF0C\u53EF\u4EE5\u662F\u57FA\u672C\u6570\u636E\u7C7B\u578B\u3001\u5BF9\u8C61\u548C\u96C6\u5408\uFF0C\u5982\u679C\u4E0D\u9700\u8981\u8FD4\u56DE\u6570\u636E\uFF0C\u5219\u4F7F\u7528 void \u5173\u952E\u5B57\u3002</p><p><strong>\u65B9\u6CD5\u540D</strong>\uFF1A\u65B9\u6CD5\u540D\u6700\u597D\u53CD\u5E94\u51FA\u65B9\u6CD5\u7684\u529F\u80FD\uFF0C\u6BD4\u5982\uFF0C\u6211\u4EEC\u8981\u521B\u5EFA\u4E00\u4E2A\u5C06\u4E24\u4E2A\u6570\u5B57\u76F8\u51CF\u7684\u65B9\u6CD5\uFF0C\u90A3\u4E48\u65B9\u6CD5\u540D\u6700\u597D\u662F subtract\u3002</p><p>\u65B9\u6CD5\u540D\u6700\u597D\u662F\u4E00\u4E2A\u52A8\u8BCD\uFF0C\u5E76\u4E14\u4EE5\u5C0F\u5199\u5B57\u6BCD\u5F00\u5934\u3002\u5982\u679C\u65B9\u6CD5\u540D\u5305\u542B\u4E24\u4E2A\u4EE5\u4E0A\u5355\u8BCD\uFF0C\u90A3\u4E48\u7B2C\u4E00\u4E2A\u5355\u8BCD\u6700\u597D\u662F\u52A8\u8BCD\uFF0C\u7136\u540E\u662F\u5F62\u5BB9\u8BCD\u6216\u8005\u540D\u8BCD\uFF0C\u5E76\u4E14\u8981\u4EE5\u9A7C\u5CF0\u5F0F\u7684\u547D\u540D\u65B9\u5F0F\u547D\u540D\u3002\u6BD4\u5982\uFF1A</p><ul><li>\u4E00\u4E2A\u5355\u8BCD\u7684\u65B9\u6CD5\u540D\uFF1A<code>sum()</code></li><li>\u591A\u4E2A\u5355\u8BCD\u7684\u65B9\u6CD5\u540D\uFF1A<code>stringComparision()</code></li></ul><p>\u4E00\u4E2A\u65B9\u6CD5\u53EF\u80FD\u4E0E\u540C\u4E00\u4E2A\u7C7B\u4E2D\u7684\u53E6\u5916\u4E00\u4E2A\u65B9\u6CD5\u540C\u540D\uFF0C\u8FD9\u88AB\u79F0\u4E3A\u65B9\u6CD5\u91CD\u8F7D\u3002</p><p><strong>\u53C2\u6570</strong>\uFF1A\u53C2\u6570\u88AB\u653E\u5728\u4E00\u4E2A\u5706\u62EC\u53F7\u5185\uFF0C\u5982\u679C\u6709\u591A\u4E2A\u53C2\u6570\uFF0C\u53EF\u4EE5\u4F7F\u7528\u9017\u53F7\u9694\u5F00\u3002\u53C2\u6570\u5305\u542B\u4E24\u4E2A\u90E8\u5206\uFF0C\u53C2\u6570\u7C7B\u578B\u548C\u53C2\u6570\u540D\u3002\u5982\u679C\u65B9\u6CD5\u6CA1\u6709\u53C2\u6570\uFF0C\u5706\u62EC\u53F7\u662F\u7A7A\u7684\u3002</p><p><strong>\u65B9\u6CD5\u7B7E\u540D</strong>\uFF1A\u6BCF\u4E00\u4E2A\u65B9\u6CD5\u90FD\u6709\u4E00\u4E2A\u7B7E\u540D\uFF0C\u5305\u62EC\u65B9\u6CD5\u540D\u548C\u53C2\u6570\u3002</p><p><strong>\u65B9\u6CD5\u4F53</strong>\uFF1A\u65B9\u6CD5\u4F53\u653E\u5728\u4E00\u5BF9\u82B1\u62EC\u53F7\u5185\uFF0C\u628A\u4E00\u4E9B\u4EE3\u7801\u653E\u5728\u4E00\u8D77\uFF0C\u7528\u6765\u6267\u884C\u7279\u5B9A\u7684\u4EFB\u52A1\u3002</p><h3 id="_02\u3001\u65B9\u6CD5\u6709\u54EA\u51E0\u79CD" tabindex="-1"><a class="header-anchor" href="#_02\u3001\u65B9\u6CD5\u6709\u54EA\u51E0\u79CD" aria-hidden="true">#</a> 02\u3001\u65B9\u6CD5\u6709\u54EA\u51E0\u79CD\uFF1F</h3><p>\u65B9\u6CD5\u53EF\u4EE5\u5206\u4E3A\u4E24\u79CD\uFF0C\u4E00\u79CD\u53EB\u9884\u5148\u5B9A\u4E49\u65B9\u6CD5\uFF0C\u4E00\u79CD\u53EB\u7528\u6237\u81EA\u5B9A\u4E49\u65B9\u6CD5\u3002</p><p><strong>1\uFF09\u9884\u5148\u5B9A\u4E49\u65B9\u6CD5</strong></p><p>Java \u63D0\u4F9B\u4E86\u5927\u91CF\u9884\u5148\u5B9A\u4E49\u597D\u7684\u65B9\u6CD5\u4F9B\u6211\u4EEC\u8C03\u7528\uFF0C\u4E5F\u79F0\u4E3A\u6807\u51C6\u7C7B\u5E93\u65B9\u6CD5\uFF0C\u6216\u8005\u5185\u7F6E\u65B9\u6CD5\u3002\u6BD4\u5982\u8BF4 String \u7C7B\u7684 <code>length()</code>\u3001<code>equals()</code>\u3001<code>compare()</code> \u65B9\u6CD5\uFF0C\u4EE5\u53CA\u6211\u4EEC\u5728\u521D\u5B66 Java \u9636\u6BB5\u6700\u5E38\u7528\u7684 <code>println()</code> \u65B9\u6CD5\uFF0C\u7528\u6765\u5728\u63A7\u5236\u53F0\u6253\u5370\u4FE1\u606F\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token doc-comment comment">/**
  * <span class="token keyword">@author</span> \u5FAE\u4FE1\u641C\u300C\u6C89\u9ED8\u738B\u4E8C\u300D\uFF0C\u56DE\u590D\u5173\u952E\u5B57 PDF
  */</span>
 <span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">PredefinedMethodDemo</span> <span class="token punctuation">{</span>
diff --git a/dist/assets/mybatis.html.a18a9ce2.js b/dist/assets/mybatis.html.41ff93f4.js
similarity index 99%
rename from dist/assets/mybatis.html.a18a9ce2.js
rename to dist/assets/mybatis.html.41ff93f4.js
index 3b3431f3..ef8e592a 100644
--- a/dist/assets/mybatis.html.a18a9ce2.js
+++ b/dist/assets/mybatis.html.41ff93f4.js
@@ -1,4 +1,4 @@
-import{_ as e}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o,c,a as s,b as t,d as n,e as l}from"./app.a0271b9c.js";const i={},r=n("\u56FE\u6587\u8BE6\u89E3 20 \u9053MyBatis\u9762\u8BD5\u9AD8\u9891\u9898\uFF0C\u8FD9\u6B21\u540A\u6253\u9762\u8BD5\u5B98\uFF0C\u6211\u89C9\u5F97\u7A33\u4E86\uFF08\u624B\u52A8 dog\uFF09\u3002\u6574\u7406\uFF1A\u6C89\u9ED8\u738B\u4E8C\uFF0C\u6233"),u={href:"https://mp.weixin.qq.com/s/en2RgcVx52Ql3tYGLfv3Kw",target:"_blank",rel:"noopener noreferrer"},k=n("\u8F6C\u8F7D\u94FE\u63A5"),d=n("\uFF0C\u4F5C\u8005\uFF1A\u4E09\u5206\u6076\uFF0C\u6233"),m={href:"https://mp.weixin.qq.com/s/O_5Id2o9IP4loPazJuiHng",target:"_blank",rel:"noopener noreferrer"},v=n("\u539F\u6587\u94FE\u63A5"),b=n("\u3002"),g=l(`<p>\u5927\u5BB6\u597D\uFF0C\u6211\u662F\u4E8C\u54E5\u5440\uFF0C\u9762\u6E23\u9006\u88AD\u7CFB\u5217\u7EE7\u7EED\uFF0C\u8FD9\u8282\u6211\u4EEC\u7684\u4E3B\u89D2\u662FMyBatis\uFF0C\u4F5C\u4E3A\u5F53\u524D\u56FD\u5185\u6700\u6D41\u884C\u7684ORM\u6846\u67B6\uFF0C\u662F\u6211\u4EEC\u8FD9\u4E9Bcrud\u9009\u624B\u6700\u8D81\u624B\u7684\u5DE5\u5177\uFF0C\u8D76\u7D27\u6765\u770B\u770B\u9762\u8BD5\u90FD\u4F1A\u95EE\u54EA\u4E9B\u95EE\u9898\u5427\u3002</p><h2 id="\u57FA\u7840" tabindex="-1"><a class="header-anchor" href="#\u57FA\u7840" aria-hidden="true">#</a> \u57FA\u7840</h2><h3 id="_1-\u8BF4\u8BF4\u4EC0\u4E48\u662Fmybatis" tabindex="-1"><a class="header-anchor" href="#_1-\u8BF4\u8BF4\u4EC0\u4E48\u662Fmybatis" aria-hidden="true">#</a> 1. \u8BF4\u8BF4\u4EC0\u4E48\u662FMyBatis?</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/mybatis-41c60cf7-6551-4720-8735-290a083640a5.png" alt="MyBatis logo"></p><p><strong>\u5148\u5439\u4E00\u4E0B</strong>\uFF1A</p><ul><li>Mybatis \u662F\u4E00\u4E2A\u534A ORM\uFF08\u5BF9\u8C61\u5173\u7CFB\u6620\u5C04\uFF09\u6846\u67B6\uFF0C\u5B83\u5185\u90E8\u5C01\u88C5\u4E86 JDBC\uFF0C\u5F00\u53D1\u65F6\u53EA\u9700\u8981\u5173\u6CE8 SQL \u8BED\u53E5\u672C\u8EAB\uFF0C\u4E0D\u9700\u8981\u82B1\u8D39\u7CBE\u529B\u53BB\u5904\u7406\u52A0\u8F7D\u9A71\u52A8\u3001\u521B\u5EFA\u8FDE\u63A5\u3001\u521B\u5EFAstatement \u7B49\u7E41\u6742\u7684\u8FC7\u7A0B\u3002\u7A0B\u5E8F\u5458\u76F4\u63A5\u7F16\u5199\u539F\u751F\u6001 sql\uFF0C\u53EF\u4EE5\u4E25\u683C\u63A7\u5236 sql \u6267\u884C\u6027\u80FD\uFF0C\u7075\u6D3B\u5EA6\u9AD8\u3002</li><li>MyBatis \u53EF\u4EE5\u4F7F\u7528 XML \u6216\u6CE8\u89E3\u6765\u914D\u7F6E\u548C\u6620\u5C04\u539F\u751F\u4FE1\u606F\uFF0C\u5C06 POJO \u6620\u5C04\u6210\u6570\u636E\u5E93\u4E2D\u7684\u8BB0\u5F55\uFF0C\u907F\u514D\u4E86\u51E0\u4E4E\u6240\u6709\u7684 JDBC \u4EE3\u7801\u548C\u624B\u52A8\u8BBE\u7F6E\u53C2\u6570\u4EE5\u53CA\u83B7\u53D6\u7ED3\u679C\u96C6\u3002</li></ul><p><strong>\u518D\u8BF4\u4E00\u4E0B\u7F3A\u70B9</strong></p><ul><li>SQL\u8BED\u53E5\u7684\u7F16\u5199\u5DE5\u4F5C\u91CF\u8F83\u5927\uFF0C\u5C24\u5176\u5F53\u5B57\u6BB5\u591A\u3001\u5173\u8054\u8868\u591A\u65F6\uFF0C\u5BF9\u5F00\u53D1\u4EBA\u5458\u7F16\u5199SQL\u8BED\u53E5\u7684\u529F\u5E95\u6709\u4E00\u5B9A\u8981\u6C42</li><li>SQL\u8BED\u53E5\u4F9D\u8D56\u4E8E\u6570\u636E\u5E93\uFF0C\u5BFC\u81F4\u6570\u636E\u5E93\u79FB\u690D\u6027\u5DEE\uFF0C\u4E0D\u80FD\u968F\u610F\u66F4\u6362\u6570\u636E\u5E93</li></ul><blockquote><p><strong>ORM\u662F\u4EC0\u4E48?</strong></p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/mybatis-ea212850-56e0-4d12-98fb-03bb40007f44.png" alt="ORM\u7B80\u5355\u793A\u610F\u56FE"></p><ul><li>ORM\uFF08Object Relational Mapping\uFF09\uFF0C\u5BF9\u8C61\u5173\u7CFB\u6620\u5C04\uFF0C\u662F\u4E00\u79CD\u4E3A\u4E86\u89E3\u51B3\u5173\u7CFB\u578B\u6570\u636E\u5E93\u6570\u636E\u4E0E\u7B80\u5355Java\u5BF9\u8C61\uFF08POJO\uFF09\u7684\u6620\u5C04\u5173\u7CFB\u7684\u6280\u672F\u3002\u7B80\u5355\u6765\u8BF4\uFF0CORM\u662F\u901A\u8FC7\u4F7F\u7528\u63CF\u8FF0\u5BF9\u8C61\u548C\u6570\u636E\u5E93\u4E4B\u95F4\u6620\u5C04\u7684\u5143\u6570\u636E\uFF0C\u5C06\u7A0B\u5E8F\u4E2D\u7684\u5BF9\u8C61\u81EA\u52A8\u6301\u4E45\u5316\u5230\u5173\u7CFB\u578B\u6570\u636E\u5E93\u4E2D\u3002</li></ul><blockquote><p><strong>\u4E3A\u4EC0\u4E48\u8BF4Mybatis\u662F\u534A\u81EA\u52A8ORM\u6620\u5C04\u5DE5\u5177\uFF1F\u5B83\u4E0E\u5168\u81EA\u52A8\u7684\u533A\u522B\u5728\u54EA\u91CC\uFF1F</strong></p></blockquote><ul><li>Hibernate\u5C5E\u4E8E\u5168\u81EA\u52A8ORM\u6620\u5C04\u5DE5\u5177\uFF0C\u4F7F\u7528Hibernate\u67E5\u8BE2\u5173\u8054\u5BF9\u8C61\u6216\u8005\u5173\u8054\u96C6\u5408\u5BF9\u8C61\u65F6\uFF0C\u53EF\u4EE5\u6839\u636E\u5BF9\u8C61\u5173\u7CFB\u6A21\u578B\u76F4\u63A5\u83B7\u53D6\uFF0C\u6240\u4EE5\u5B83\u662F\u5168\u81EA\u52A8\u7684\u3002</li><li>\u800CMybatis\u5728\u67E5\u8BE2\u5173\u8054\u5BF9\u8C61\u6216\u5173\u8054\u96C6\u5408\u5BF9\u8C61\u65F6\uFF0C\u9700\u8981\u624B\u52A8\u7F16\u5199SQL\u6765\u5B8C\u6210\uFF0C\u6240\u4EE5\uFF0C\u88AB\u79F0\u4E4B\u4E3A\u534A\u81EA\u52A8ORM\u6620\u5C04\u5DE5\u5177\u3002</li></ul><blockquote><p><strong>JDBC\u7F16\u7A0B\u6709\u54EA\u4E9B\u4E0D\u8DB3\u4E4B\u5904\uFF0CMyBatis\u662F\u5982\u4F55\u89E3\u51B3\u7684\uFF1F</strong></p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/mybatis-f8b181a3-ad40-4381-98ba-351668579bfb.png" alt="JDBC\u7F16\u7A0B\u7684\u4E0D\u8DB3"></p><ul><li>1\u3001\u6570\u636E\u8FDE\u63A5\u521B\u5EFA\u3001\u91CA\u653E\u9891\u7E41\u9020\u6210\u7CFB\u7EDF\u8D44\u6E90\u6D6A\u8D39\u4ECE\u800C\u5F71\u54CD\u7CFB\u7EDF\u6027\u80FD\uFF0C\u5728mybatis-config.xml\u4E2D\u914D\u7F6E\u6570\u636E\u94FE\u63A5\u6C60\uFF0C\u4F7F\u7528\u8FDE\u63A5\u6C60\u7EDF\u4E00\u7BA1\u7406\u6570\u636E\u5E93\u8FDE\u63A5\u3002</li><li>2\u3001sql\u8BED\u53E5\u5199\u5728\u4EE3\u7801\u4E2D\u9020\u6210\u4EE3\u7801\u4E0D\u6613\u7EF4\u62A4\uFF0C\u5C06sql\u8BED\u53E5\u914D\u7F6E\u5728XXXXmapper.xml\u6587\u4EF6\u4E2D\u4E0Ejava\u4EE3\u7801\u5206\u79BB\u3002</li><li>3\u3001\u5411sql\u8BED\u53E5\u4F20\u53C2\u6570\u9EBB\u70E6\uFF0C\u56E0\u4E3Asql\u8BED\u53E5\u7684where\u6761\u4EF6\u4E0D\u4E00\u5B9A\uFF0C\u53EF\u80FD\u591A\u4E5F\u53EF\u80FD\u5C11\uFF0C\u5360\u4F4D\u7B26\u9700\u8981\u548C\u53C2\u6570\u4E00\u4E00\u5BF9\u5E94\u3002Mybatis\u81EA\u52A8\u5C06java\u5BF9\u8C61\u6620\u5C04\u81F3sql\u8BED\u53E5\u3002</li><li>4\u3001\u5BF9\u7ED3\u679C\u96C6\u89E3\u6790\u9EBB\u70E6\uFF0Csql\u53D8\u5316\u5BFC\u81F4\u89E3\u6790\u4EE3\u7801\u53D8\u5316\uFF0C\u4E14\u89E3\u6790\u524D\u9700\u8981\u904D\u5386\uFF0C\u5982\u679C\u80FD\u5C06\u6570\u636E\u5E93\u8BB0\u5F55\u5C01\u88C5\u6210pojo\u5BF9\u8C61\u89E3\u6790\u6BD4\u8F83\u65B9\u4FBF\u3002Mybatis\u81EA\u52A8\u5C06sql\u6267\u884C\u7ED3\u679C\u6620\u5C04\u81F3java\u5BF9\u8C61\u3002</li></ul><h3 id="_2-hibernate-\u548C-mybatis-\u6709\u4EC0\u4E48\u533A\u522B" tabindex="-1"><a class="header-anchor" href="#_2-hibernate-\u548C-mybatis-\u6709\u4EC0\u4E48\u533A\u522B" aria-hidden="true">#</a> 2. Hibernate \u548C MyBatis \u6709\u4EC0\u4E48\u533A\u522B\uFF1F</h3><p><strong>\u76F8\u540C\u70B9</strong></p><ul><li>\u90FD\u662F\u5BF9jdbc\u7684\u5C01\u88C5\uFF0C\u90FD\u662F\u5E94\u7528\u4E8E\u6301\u4E45\u5C42\u7684\u6846\u67B6\u3002</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/mybatis-4964e454-7c80-4768-bf0e-d0bf417353ef.gif" alt="\u8FD9\u8FD8\u7528\u8BF4\uFF1F"></p><p><strong>\u4E0D\u540C\u70B9</strong></p><p>1\uFF09\u6620\u5C04\u5173\u7CFB</p><ul><li>MyBatis \u662F\u4E00\u4E2A\u534A\u81EA\u52A8\u6620\u5C04\u7684\u6846\u67B6\uFF0C\u914D\u7F6EJava\u5BF9\u8C61\u4E0Esql\u8BED\u53E5\u6267\u884C\u7ED3\u679C\u7684\u5BF9\u5E94\u5173\u7CFB\uFF0C\u591A\u8868\u5173\u8054\u5173\u7CFB\u914D\u7F6E\u7B80\u5355</li><li>Hibernate \u662F\u4E00\u4E2A\u5168\u8868\u6620\u5C04\u7684\u6846\u67B6\uFF0C\u914D\u7F6EJava\u5BF9\u8C61\u4E0E\u6570\u636E\u5E93\u8868\u7684\u5BF9\u5E94\u5173\u7CFB\uFF0C\u591A\u8868\u5173\u8054\u5173\u7CFB\u914D\u7F6E\u590D\u6742</li></ul><p>2\uFF09<strong>SQL\u4F18\u5316\u548C\u79FB\u690D\u6027</strong></p><ul><li>Hibernate \u5BF9SQL\u8BED\u53E5\u5C01\u88C5\uFF0C\u63D0\u4F9B\u4E86\u65E5\u5FD7\u3001\u7F13\u5B58\u3001\u7EA7\u8054\uFF08\u7EA7\u8054\u6BD4 MyBatis \u5F3A\u5927\uFF09\u7B49\u7279\u6027\uFF0C\u6B64\u5916\u8FD8\u63D0\u4F9B HQL\uFF08Hibernate Query Language\uFF09\u64CD\u4F5C\u6570\u636E\u5E93\uFF0C\u6570\u636E\u5E93\u65E0\u5173\u6027\u652F\u6301\u597D\uFF0C\u4F46\u4F1A\u591A\u6D88\u8017\u6027\u80FD\u3002\u5982\u679C\u9879\u76EE\u9700\u8981\u652F\u6301\u591A\u79CD\u6570\u636E\u5E93\uFF0C\u4EE3\u7801\u5F00\u53D1\u91CF\u5C11\uFF0C\u4F46SQL\u8BED\u53E5\u4F18\u5316\u56F0\u96BE\u3002</li><li>MyBatis \u9700\u8981\u624B\u52A8\u7F16\u5199 SQL\uFF0C\u652F\u6301\u52A8\u6001 SQL\u3001\u5904\u7406\u5217\u8868\u3001\u52A8\u6001\u751F\u6210\u8868\u540D\u3001\u652F\u6301\u5B58\u50A8\u8FC7\u7A0B\u3002\u5F00\u53D1\u5DE5\u4F5C\u91CF\u76F8\u5BF9\u5927\u4E9B\u3002\u76F4\u63A5\u4F7F\u7528SQL\u8BED\u53E5\u64CD\u4F5C\u6570\u636E\u5E93\uFF0C\u4E0D\u652F\u6301\u6570\u636E\u5E93\u65E0\u5173\u6027\uFF0C\u4F46sql\u8BED\u53E5\u4F18\u5316\u5BB9\u6613\u3002</li></ul><p>3\uFF09<strong>MyBatis\u548CHibernate\u7684\u9002\u7528\u573A\u666F\u4E0D\u540C</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/mybatis-d1c707f7-0bd0-415c-b190-4757792c072b.png" alt="Mybatis vs Hibernate"></p><ul><li>Hibernate \u662F\u6807\u51C6\u7684ORM\u6846\u67B6\uFF0CSQL\u7F16\u5199\u91CF\u8F83\u5C11\uFF0C\u4F46\u4E0D\u591F\u7075\u6D3B\uFF0C\u9002\u5408\u4E8E\u9700\u6C42\u76F8\u5BF9\u7A33\u5B9A\uFF0C\u4E2D\u5C0F\u578B\u7684\u8F6F\u4EF6\u9879\u76EE\uFF0C\u6BD4\u5982\uFF1A\u529E\u516C\u81EA\u52A8\u5316\u7CFB\u7EDF</li><li>MyBatis \u662F\u534AORM\u6846\u67B6\uFF0C\u9700\u8981\u7F16\u5199\u8F83\u591ASQL\uFF0C\u4F46\u662F\u6BD4\u8F83\u7075\u6D3B\uFF0C\u9002\u5408\u4E8E\u9700\u6C42\u53D8\u5316\u9891\u7E41\uFF0C\u5FEB\u901F\u8FED\u4EE3\u7684\u9879\u76EE\uFF0C\u6BD4\u5982\uFF1A\u7535\u5546\u7F51\u7AD9</li></ul><h3 id="_3-mybatis\u4F7F\u7528\u8FC7\u7A0B-\u751F\u547D\u5468\u671F" tabindex="-1"><a class="header-anchor" href="#_3-mybatis\u4F7F\u7528\u8FC7\u7A0B-\u751F\u547D\u5468\u671F" aria-hidden="true">#</a> 3. MyBatis\u4F7F\u7528\u8FC7\u7A0B\uFF1F\u751F\u547D\u5468\u671F\uFF1F</h3><p>MyBatis\u57FA\u672C\u4F7F\u7528\u7684\u8FC7\u7A0B\u5927\u6982\u53EF\u4EE5\u5206\u4E3A\u8FD9\u4E48\u51E0\u6B65\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/mybatis-47bab2e8-5c08-4f61-9c0c-dddfe09fb2b5.png" alt="Mybatis\u57FA\u672C\u4F7F\u7528\u6B65\u9AA4"></p><ul><li>1\uFF09\u521B\u5EFASqlSessionFactory</li></ul><p>\u53EF\u4EE5\u4ECE\u914D\u7F6E\u6216\u8005\u76F4\u63A5\u7F16\u7801\u6765\u521B\u5EFASqlSessionFactory</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">String</span> resource <span class="token operator">=</span> <span class="token string">&quot;org/mybatis/example/mybatis-config.xml&quot;</span><span class="token punctuation">;</span>
+import{_ as e}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o,c,a as s,b as t,d as n,e as l}from"./app.615e41d8.js";const i={},r=n("\u56FE\u6587\u8BE6\u89E3 20 \u9053MyBatis\u9762\u8BD5\u9AD8\u9891\u9898\uFF0C\u8FD9\u6B21\u540A\u6253\u9762\u8BD5\u5B98\uFF0C\u6211\u89C9\u5F97\u7A33\u4E86\uFF08\u624B\u52A8 dog\uFF09\u3002\u6574\u7406\uFF1A\u6C89\u9ED8\u738B\u4E8C\uFF0C\u6233"),u={href:"https://mp.weixin.qq.com/s/en2RgcVx52Ql3tYGLfv3Kw",target:"_blank",rel:"noopener noreferrer"},k=n("\u8F6C\u8F7D\u94FE\u63A5"),d=n("\uFF0C\u4F5C\u8005\uFF1A\u4E09\u5206\u6076\uFF0C\u6233"),m={href:"https://mp.weixin.qq.com/s/O_5Id2o9IP4loPazJuiHng",target:"_blank",rel:"noopener noreferrer"},v=n("\u539F\u6587\u94FE\u63A5"),b=n("\u3002"),g=l(`<p>\u5927\u5BB6\u597D\uFF0C\u6211\u662F\u4E8C\u54E5\u5440\uFF0C\u9762\u6E23\u9006\u88AD\u7CFB\u5217\u7EE7\u7EED\uFF0C\u8FD9\u8282\u6211\u4EEC\u7684\u4E3B\u89D2\u662FMyBatis\uFF0C\u4F5C\u4E3A\u5F53\u524D\u56FD\u5185\u6700\u6D41\u884C\u7684ORM\u6846\u67B6\uFF0C\u662F\u6211\u4EEC\u8FD9\u4E9Bcrud\u9009\u624B\u6700\u8D81\u624B\u7684\u5DE5\u5177\uFF0C\u8D76\u7D27\u6765\u770B\u770B\u9762\u8BD5\u90FD\u4F1A\u95EE\u54EA\u4E9B\u95EE\u9898\u5427\u3002</p><h2 id="\u57FA\u7840" tabindex="-1"><a class="header-anchor" href="#\u57FA\u7840" aria-hidden="true">#</a> \u57FA\u7840</h2><h3 id="_1-\u8BF4\u8BF4\u4EC0\u4E48\u662Fmybatis" tabindex="-1"><a class="header-anchor" href="#_1-\u8BF4\u8BF4\u4EC0\u4E48\u662Fmybatis" aria-hidden="true">#</a> 1. \u8BF4\u8BF4\u4EC0\u4E48\u662FMyBatis?</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/mybatis-41c60cf7-6551-4720-8735-290a083640a5.png" alt="MyBatis logo"></p><p><strong>\u5148\u5439\u4E00\u4E0B</strong>\uFF1A</p><ul><li>Mybatis \u662F\u4E00\u4E2A\u534A ORM\uFF08\u5BF9\u8C61\u5173\u7CFB\u6620\u5C04\uFF09\u6846\u67B6\uFF0C\u5B83\u5185\u90E8\u5C01\u88C5\u4E86 JDBC\uFF0C\u5F00\u53D1\u65F6\u53EA\u9700\u8981\u5173\u6CE8 SQL \u8BED\u53E5\u672C\u8EAB\uFF0C\u4E0D\u9700\u8981\u82B1\u8D39\u7CBE\u529B\u53BB\u5904\u7406\u52A0\u8F7D\u9A71\u52A8\u3001\u521B\u5EFA\u8FDE\u63A5\u3001\u521B\u5EFAstatement \u7B49\u7E41\u6742\u7684\u8FC7\u7A0B\u3002\u7A0B\u5E8F\u5458\u76F4\u63A5\u7F16\u5199\u539F\u751F\u6001 sql\uFF0C\u53EF\u4EE5\u4E25\u683C\u63A7\u5236 sql \u6267\u884C\u6027\u80FD\uFF0C\u7075\u6D3B\u5EA6\u9AD8\u3002</li><li>MyBatis \u53EF\u4EE5\u4F7F\u7528 XML \u6216\u6CE8\u89E3\u6765\u914D\u7F6E\u548C\u6620\u5C04\u539F\u751F\u4FE1\u606F\uFF0C\u5C06 POJO \u6620\u5C04\u6210\u6570\u636E\u5E93\u4E2D\u7684\u8BB0\u5F55\uFF0C\u907F\u514D\u4E86\u51E0\u4E4E\u6240\u6709\u7684 JDBC \u4EE3\u7801\u548C\u624B\u52A8\u8BBE\u7F6E\u53C2\u6570\u4EE5\u53CA\u83B7\u53D6\u7ED3\u679C\u96C6\u3002</li></ul><p><strong>\u518D\u8BF4\u4E00\u4E0B\u7F3A\u70B9</strong></p><ul><li>SQL\u8BED\u53E5\u7684\u7F16\u5199\u5DE5\u4F5C\u91CF\u8F83\u5927\uFF0C\u5C24\u5176\u5F53\u5B57\u6BB5\u591A\u3001\u5173\u8054\u8868\u591A\u65F6\uFF0C\u5BF9\u5F00\u53D1\u4EBA\u5458\u7F16\u5199SQL\u8BED\u53E5\u7684\u529F\u5E95\u6709\u4E00\u5B9A\u8981\u6C42</li><li>SQL\u8BED\u53E5\u4F9D\u8D56\u4E8E\u6570\u636E\u5E93\uFF0C\u5BFC\u81F4\u6570\u636E\u5E93\u79FB\u690D\u6027\u5DEE\uFF0C\u4E0D\u80FD\u968F\u610F\u66F4\u6362\u6570\u636E\u5E93</li></ul><blockquote><p><strong>ORM\u662F\u4EC0\u4E48?</strong></p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/mybatis-ea212850-56e0-4d12-98fb-03bb40007f44.png" alt="ORM\u7B80\u5355\u793A\u610F\u56FE"></p><ul><li>ORM\uFF08Object Relational Mapping\uFF09\uFF0C\u5BF9\u8C61\u5173\u7CFB\u6620\u5C04\uFF0C\u662F\u4E00\u79CD\u4E3A\u4E86\u89E3\u51B3\u5173\u7CFB\u578B\u6570\u636E\u5E93\u6570\u636E\u4E0E\u7B80\u5355Java\u5BF9\u8C61\uFF08POJO\uFF09\u7684\u6620\u5C04\u5173\u7CFB\u7684\u6280\u672F\u3002\u7B80\u5355\u6765\u8BF4\uFF0CORM\u662F\u901A\u8FC7\u4F7F\u7528\u63CF\u8FF0\u5BF9\u8C61\u548C\u6570\u636E\u5E93\u4E4B\u95F4\u6620\u5C04\u7684\u5143\u6570\u636E\uFF0C\u5C06\u7A0B\u5E8F\u4E2D\u7684\u5BF9\u8C61\u81EA\u52A8\u6301\u4E45\u5316\u5230\u5173\u7CFB\u578B\u6570\u636E\u5E93\u4E2D\u3002</li></ul><blockquote><p><strong>\u4E3A\u4EC0\u4E48\u8BF4Mybatis\u662F\u534A\u81EA\u52A8ORM\u6620\u5C04\u5DE5\u5177\uFF1F\u5B83\u4E0E\u5168\u81EA\u52A8\u7684\u533A\u522B\u5728\u54EA\u91CC\uFF1F</strong></p></blockquote><ul><li>Hibernate\u5C5E\u4E8E\u5168\u81EA\u52A8ORM\u6620\u5C04\u5DE5\u5177\uFF0C\u4F7F\u7528Hibernate\u67E5\u8BE2\u5173\u8054\u5BF9\u8C61\u6216\u8005\u5173\u8054\u96C6\u5408\u5BF9\u8C61\u65F6\uFF0C\u53EF\u4EE5\u6839\u636E\u5BF9\u8C61\u5173\u7CFB\u6A21\u578B\u76F4\u63A5\u83B7\u53D6\uFF0C\u6240\u4EE5\u5B83\u662F\u5168\u81EA\u52A8\u7684\u3002</li><li>\u800CMybatis\u5728\u67E5\u8BE2\u5173\u8054\u5BF9\u8C61\u6216\u5173\u8054\u96C6\u5408\u5BF9\u8C61\u65F6\uFF0C\u9700\u8981\u624B\u52A8\u7F16\u5199SQL\u6765\u5B8C\u6210\uFF0C\u6240\u4EE5\uFF0C\u88AB\u79F0\u4E4B\u4E3A\u534A\u81EA\u52A8ORM\u6620\u5C04\u5DE5\u5177\u3002</li></ul><blockquote><p><strong>JDBC\u7F16\u7A0B\u6709\u54EA\u4E9B\u4E0D\u8DB3\u4E4B\u5904\uFF0CMyBatis\u662F\u5982\u4F55\u89E3\u51B3\u7684\uFF1F</strong></p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/mybatis-f8b181a3-ad40-4381-98ba-351668579bfb.png" alt="JDBC\u7F16\u7A0B\u7684\u4E0D\u8DB3"></p><ul><li>1\u3001\u6570\u636E\u8FDE\u63A5\u521B\u5EFA\u3001\u91CA\u653E\u9891\u7E41\u9020\u6210\u7CFB\u7EDF\u8D44\u6E90\u6D6A\u8D39\u4ECE\u800C\u5F71\u54CD\u7CFB\u7EDF\u6027\u80FD\uFF0C\u5728mybatis-config.xml\u4E2D\u914D\u7F6E\u6570\u636E\u94FE\u63A5\u6C60\uFF0C\u4F7F\u7528\u8FDE\u63A5\u6C60\u7EDF\u4E00\u7BA1\u7406\u6570\u636E\u5E93\u8FDE\u63A5\u3002</li><li>2\u3001sql\u8BED\u53E5\u5199\u5728\u4EE3\u7801\u4E2D\u9020\u6210\u4EE3\u7801\u4E0D\u6613\u7EF4\u62A4\uFF0C\u5C06sql\u8BED\u53E5\u914D\u7F6E\u5728XXXXmapper.xml\u6587\u4EF6\u4E2D\u4E0Ejava\u4EE3\u7801\u5206\u79BB\u3002</li><li>3\u3001\u5411sql\u8BED\u53E5\u4F20\u53C2\u6570\u9EBB\u70E6\uFF0C\u56E0\u4E3Asql\u8BED\u53E5\u7684where\u6761\u4EF6\u4E0D\u4E00\u5B9A\uFF0C\u53EF\u80FD\u591A\u4E5F\u53EF\u80FD\u5C11\uFF0C\u5360\u4F4D\u7B26\u9700\u8981\u548C\u53C2\u6570\u4E00\u4E00\u5BF9\u5E94\u3002Mybatis\u81EA\u52A8\u5C06java\u5BF9\u8C61\u6620\u5C04\u81F3sql\u8BED\u53E5\u3002</li><li>4\u3001\u5BF9\u7ED3\u679C\u96C6\u89E3\u6790\u9EBB\u70E6\uFF0Csql\u53D8\u5316\u5BFC\u81F4\u89E3\u6790\u4EE3\u7801\u53D8\u5316\uFF0C\u4E14\u89E3\u6790\u524D\u9700\u8981\u904D\u5386\uFF0C\u5982\u679C\u80FD\u5C06\u6570\u636E\u5E93\u8BB0\u5F55\u5C01\u88C5\u6210pojo\u5BF9\u8C61\u89E3\u6790\u6BD4\u8F83\u65B9\u4FBF\u3002Mybatis\u81EA\u52A8\u5C06sql\u6267\u884C\u7ED3\u679C\u6620\u5C04\u81F3java\u5BF9\u8C61\u3002</li></ul><h3 id="_2-hibernate-\u548C-mybatis-\u6709\u4EC0\u4E48\u533A\u522B" tabindex="-1"><a class="header-anchor" href="#_2-hibernate-\u548C-mybatis-\u6709\u4EC0\u4E48\u533A\u522B" aria-hidden="true">#</a> 2. Hibernate \u548C MyBatis \u6709\u4EC0\u4E48\u533A\u522B\uFF1F</h3><p><strong>\u76F8\u540C\u70B9</strong></p><ul><li>\u90FD\u662F\u5BF9jdbc\u7684\u5C01\u88C5\uFF0C\u90FD\u662F\u5E94\u7528\u4E8E\u6301\u4E45\u5C42\u7684\u6846\u67B6\u3002</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/mybatis-4964e454-7c80-4768-bf0e-d0bf417353ef.gif" alt="\u8FD9\u8FD8\u7528\u8BF4\uFF1F"></p><p><strong>\u4E0D\u540C\u70B9</strong></p><p>1\uFF09\u6620\u5C04\u5173\u7CFB</p><ul><li>MyBatis \u662F\u4E00\u4E2A\u534A\u81EA\u52A8\u6620\u5C04\u7684\u6846\u67B6\uFF0C\u914D\u7F6EJava\u5BF9\u8C61\u4E0Esql\u8BED\u53E5\u6267\u884C\u7ED3\u679C\u7684\u5BF9\u5E94\u5173\u7CFB\uFF0C\u591A\u8868\u5173\u8054\u5173\u7CFB\u914D\u7F6E\u7B80\u5355</li><li>Hibernate \u662F\u4E00\u4E2A\u5168\u8868\u6620\u5C04\u7684\u6846\u67B6\uFF0C\u914D\u7F6EJava\u5BF9\u8C61\u4E0E\u6570\u636E\u5E93\u8868\u7684\u5BF9\u5E94\u5173\u7CFB\uFF0C\u591A\u8868\u5173\u8054\u5173\u7CFB\u914D\u7F6E\u590D\u6742</li></ul><p>2\uFF09<strong>SQL\u4F18\u5316\u548C\u79FB\u690D\u6027</strong></p><ul><li>Hibernate \u5BF9SQL\u8BED\u53E5\u5C01\u88C5\uFF0C\u63D0\u4F9B\u4E86\u65E5\u5FD7\u3001\u7F13\u5B58\u3001\u7EA7\u8054\uFF08\u7EA7\u8054\u6BD4 MyBatis \u5F3A\u5927\uFF09\u7B49\u7279\u6027\uFF0C\u6B64\u5916\u8FD8\u63D0\u4F9B HQL\uFF08Hibernate Query Language\uFF09\u64CD\u4F5C\u6570\u636E\u5E93\uFF0C\u6570\u636E\u5E93\u65E0\u5173\u6027\u652F\u6301\u597D\uFF0C\u4F46\u4F1A\u591A\u6D88\u8017\u6027\u80FD\u3002\u5982\u679C\u9879\u76EE\u9700\u8981\u652F\u6301\u591A\u79CD\u6570\u636E\u5E93\uFF0C\u4EE3\u7801\u5F00\u53D1\u91CF\u5C11\uFF0C\u4F46SQL\u8BED\u53E5\u4F18\u5316\u56F0\u96BE\u3002</li><li>MyBatis \u9700\u8981\u624B\u52A8\u7F16\u5199 SQL\uFF0C\u652F\u6301\u52A8\u6001 SQL\u3001\u5904\u7406\u5217\u8868\u3001\u52A8\u6001\u751F\u6210\u8868\u540D\u3001\u652F\u6301\u5B58\u50A8\u8FC7\u7A0B\u3002\u5F00\u53D1\u5DE5\u4F5C\u91CF\u76F8\u5BF9\u5927\u4E9B\u3002\u76F4\u63A5\u4F7F\u7528SQL\u8BED\u53E5\u64CD\u4F5C\u6570\u636E\u5E93\uFF0C\u4E0D\u652F\u6301\u6570\u636E\u5E93\u65E0\u5173\u6027\uFF0C\u4F46sql\u8BED\u53E5\u4F18\u5316\u5BB9\u6613\u3002</li></ul><p>3\uFF09<strong>MyBatis\u548CHibernate\u7684\u9002\u7528\u573A\u666F\u4E0D\u540C</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/mybatis-d1c707f7-0bd0-415c-b190-4757792c072b.png" alt="Mybatis vs Hibernate"></p><ul><li>Hibernate \u662F\u6807\u51C6\u7684ORM\u6846\u67B6\uFF0CSQL\u7F16\u5199\u91CF\u8F83\u5C11\uFF0C\u4F46\u4E0D\u591F\u7075\u6D3B\uFF0C\u9002\u5408\u4E8E\u9700\u6C42\u76F8\u5BF9\u7A33\u5B9A\uFF0C\u4E2D\u5C0F\u578B\u7684\u8F6F\u4EF6\u9879\u76EE\uFF0C\u6BD4\u5982\uFF1A\u529E\u516C\u81EA\u52A8\u5316\u7CFB\u7EDF</li><li>MyBatis \u662F\u534AORM\u6846\u67B6\uFF0C\u9700\u8981\u7F16\u5199\u8F83\u591ASQL\uFF0C\u4F46\u662F\u6BD4\u8F83\u7075\u6D3B\uFF0C\u9002\u5408\u4E8E\u9700\u6C42\u53D8\u5316\u9891\u7E41\uFF0C\u5FEB\u901F\u8FED\u4EE3\u7684\u9879\u76EE\uFF0C\u6BD4\u5982\uFF1A\u7535\u5546\u7F51\u7AD9</li></ul><h3 id="_3-mybatis\u4F7F\u7528\u8FC7\u7A0B-\u751F\u547D\u5468\u671F" tabindex="-1"><a class="header-anchor" href="#_3-mybatis\u4F7F\u7528\u8FC7\u7A0B-\u751F\u547D\u5468\u671F" aria-hidden="true">#</a> 3. MyBatis\u4F7F\u7528\u8FC7\u7A0B\uFF1F\u751F\u547D\u5468\u671F\uFF1F</h3><p>MyBatis\u57FA\u672C\u4F7F\u7528\u7684\u8FC7\u7A0B\u5927\u6982\u53EF\u4EE5\u5206\u4E3A\u8FD9\u4E48\u51E0\u6B65\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/mybatis-47bab2e8-5c08-4f61-9c0c-dddfe09fb2b5.png" alt="Mybatis\u57FA\u672C\u4F7F\u7528\u6B65\u9AA4"></p><ul><li>1\uFF09\u521B\u5EFASqlSessionFactory</li></ul><p>\u53EF\u4EE5\u4ECE\u914D\u7F6E\u6216\u8005\u76F4\u63A5\u7F16\u7801\u6765\u521B\u5EFASqlSessionFactory</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">String</span> resource <span class="token operator">=</span> <span class="token string">&quot;org/mybatis/example/mybatis-config.xml&quot;</span><span class="token punctuation">;</span>
 <span class="token class-name">InputStream</span> inputStream <span class="token operator">=</span> <span class="token class-name">Resources</span><span class="token punctuation">.</span><span class="token function">getResourceAsStream</span><span class="token punctuation">(</span>resource<span class="token punctuation">)</span><span class="token punctuation">;</span>
 <span class="token class-name">SqlSessionFactory</span> sqlSessionFactory <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">SqlSessionFactoryBuilder</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">build</span><span class="token punctuation">(</span>inputStream<span class="token punctuation">)</span><span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><ul><li>2\uFF09\u901A\u8FC7SqlSessionFactory\u521B\u5EFASqlSession</li></ul><p>SqlSession\uFF08\u4F1A\u8BDD\uFF09\u53EF\u4EE5\u7406\u89E3\u4E3A\u7A0B\u5E8F\u548C\u6570\u636E\u5E93\u4E4B\u95F4\u7684\u6865\u6881</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">SqlSession</span> session <span class="token operator">=</span> sqlSessionFactory<span class="token punctuation">.</span><span class="token function">openSession</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
diff --git a/dist/assets/mysql-druid.html.bf232591.js b/dist/assets/mysql-druid.html.1c47eb57.js
similarity index 71%
rename from dist/assets/mysql-druid.html.bf232591.js
rename to dist/assets/mysql-druid.html.1c47eb57.js
index ab12b18f..eac69d78 100644
--- a/dist/assets/mysql-druid.html.bf232591.js
+++ b/dist/assets/mysql-druid.html.1c47eb57.js
@@ -1 +1 @@
-const t={key:"v-765c4bce",path:"/springboot/mysql-druid.html",title:"Spring Boot \u6574\u5408 MySQL \u548C Druid",lang:"zh-CN",frontmatter:{category:["Java\u4F01\u4E1A\u7EA7\u5F00\u53D1"],tag:["Spring Boot"],title:"Spring Boot \u6574\u5408 MySQL \u548C Druid",summary:'MySQL \u7B80\u4ECB MySQL \u662F\u76EE\u524D\u9879\u76EE\u4E2D\u8FD0\u7528\u6700\u5E7F\u6CDB\u7684\u5173\u7CFB\u578B\u6570\u636E\u5E93\uFF0C\u65E0\u8BBA\u662F\u4E92\u8054\u7F51\u5927\u5382\uFF0C\u8FD8\u662F\u4E2D\u5C0F\u578B\u516C\u53F8\uFF0C\u51E0\u4E4E\u90FD\u5728\u7528\u3002 MySQL \u4F53\u79EF\u5C0F\u3001\u901F\u5EA6\u5FEB\u3001\u6E90\u7801\u5F00\u653E\uFF0C\u6240\u4EE5\u5E7F\u53D7\u5F00\u53D1\u8005\u559C\u7231\u3002 MySQL \u7684\u5B89\u88C5\u975E\u5E38\u7B80\u5355\uFF0C\u9488\u5BF9\u4E0D\u540C\u7684\u64CD\u4F5C\u7CFB\u7EDF\uFF0CMySQL \u90FD\u63D0\u4F9B\u4E86\u5B89\u88C5\u5305\u7684\u4E0B\u8F7D\u3002 MySQL \u76EE\u524D\u4E3B\u63A8\u7684\u7248\u672C\u662F 8.0\uFF0C\u53C2\u8003\u624B\u518C\u7684\u5730\u5740\u5982\u4E0B\u6240\u793A\uFF1A "https://dev.mysql',head:[["meta",{property:"og:url",content:"https://tobebetterjavaer.com/springboot/mysql-druid.html"}],["meta",{property:"og:site_name",content:"Java \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF"}],["meta",{property:"og:title",content:"Spring Boot \u6574\u5408 MySQL \u548C Druid"}],["meta",{property:"og:type",content:"article"}],["meta",{property:"og:updated_time",content:"2022-05-21T16:06:08.000Z"}],["meta",{property:"og:locale",content:"zh-CN"}],["meta",{property:"article:tag",content:"Spring Boot"}],["meta",{property:"article:modified_time",content:"2022-05-21T16:06:08.000Z"}]]},excerpt:"",headers:[{level:3,title:"MySQL \u7B80\u4ECB",slug:"mysql-\u7B80\u4ECB",children:[]},{level:3,title:"\u5982\u4F55\u5B89\u88C5 MySQL",slug:"\u5982\u4F55\u5B89\u88C5-mysql",children:[]},{level:3,title:"Spring Boot \u6574\u5408 MySQL \u6570\u636E\u5E93",slug:"spring-boot-\u6574\u5408-mysql-\u6570\u636E\u5E93",children:[]},{level:3,title:"\u5982\u4F55\u901A\u8FC7 Navicat \u8FDE\u63A5 MySQL",slug:"\u5982\u4F55\u901A\u8FC7-navicat-\u8FDE\u63A5-mysql",children:[]},{level:3,title:"\u5982\u4F55\u901A\u8FC7 Intellij IDEA \u8FDE\u63A5 MySQL",slug:"\u5982\u4F55\u901A\u8FC7-intellij-idea-\u8FDE\u63A5-mysql",children:[]},{level:3,title:"Spring Boot \u6574\u5408 Druid",slug:"spring-boot-\u6574\u5408-druid",children:[]},{level:3,title:"\u6E90\u7801\u5730\u5740",slug:"\u6E90\u7801\u5730\u5740",children:[]}],git:{createdTime:1651747783e3,updatedTime:1653149168e3,contributors:[{name:"itwanger",email:"www.qing_gee@163.com",commits:3}]},readingTime:{minutes:6.69,words:2008},filePathRelative:"springboot/mysql-druid.md"};export{t as data};
+const t={key:"v-765c4bce",path:"/springboot/mysql-druid.html",title:"Spring Boot \u6574\u5408 MySQL \u548C Druid",lang:"zh-CN",frontmatter:{category:["Java\u4F01\u4E1A\u7EA7\u5F00\u53D1"],tag:["Spring Boot"],title:"Spring Boot \u6574\u5408 MySQL \u548C Druid",summary:'MySQL \u7B80\u4ECB MySQL \u662F\u76EE\u524D\u9879\u76EE\u4E2D\u8FD0\u7528\u6700\u5E7F\u6CDB\u7684\u5173\u7CFB\u578B\u6570\u636E\u5E93\uFF0C\u65E0\u8BBA\u662F\u4E92\u8054\u7F51\u5927\u5382\uFF0C\u8FD8\u662F\u4E2D\u5C0F\u578B\u516C\u53F8\uFF0C\u51E0\u4E4E\u90FD\u5728\u7528\u3002 MySQL \u4F53\u79EF\u5C0F\u3001\u901F\u5EA6\u5FEB\u3001\u6E90\u7801\u5F00\u653E\uFF0C\u6240\u4EE5\u5E7F\u53D7\u5F00\u53D1\u8005\u559C\u7231\u3002 MySQL \u7684\u5B89\u88C5\u975E\u5E38\u7B80\u5355\uFF0C\u9488\u5BF9\u4E0D\u540C\u7684\u64CD\u4F5C\u7CFB\u7EDF\uFF0CMySQL \u90FD\u63D0\u4F9B\u4E86\u5B89\u88C5\u5305\u7684\u4E0B\u8F7D\u3002 MySQL \u76EE\u524D\u4E3B\u63A8\u7684\u7248\u672C\u662F 8.0\uFF0C\u53C2\u8003\u624B\u518C\u7684\u5730\u5740\u5982\u4E0B\u6240\u793A\uFF1A "https://dev.mysql',head:[["meta",{property:"og:url",content:"https://tobebetterjavaer.com/springboot/mysql-druid.html"}],["meta",{property:"og:site_name",content:"Java \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF"}],["meta",{property:"og:title",content:"Spring Boot \u6574\u5408 MySQL \u548C Druid"}],["meta",{property:"og:type",content:"article"}],["meta",{property:"og:updated_time",content:"2022-06-10T11:28:25.000Z"}],["meta",{property:"og:locale",content:"zh-CN"}],["meta",{property:"article:tag",content:"Spring Boot"}],["meta",{property:"article:modified_time",content:"2022-06-10T11:28:25.000Z"}]]},excerpt:"",headers:[{level:2,title:"MySQL \u7B80\u4ECB",slug:"mysql-\u7B80\u4ECB",children:[]},{level:2,title:"\u5982\u4F55\u5B89\u88C5 MySQL",slug:"\u5982\u4F55\u5B89\u88C5-mysql",children:[]},{level:2,title:"Spring Boot \u6574\u5408 MySQL \u6570\u636E\u5E93",slug:"spring-boot-\u6574\u5408-mysql-\u6570\u636E\u5E93",children:[]},{level:2,title:"\u5982\u4F55\u901A\u8FC7 Navicat \u8FDE\u63A5 MySQL",slug:"\u5982\u4F55\u901A\u8FC7-navicat-\u8FDE\u63A5-mysql",children:[]},{level:2,title:"\u5982\u4F55\u901A\u8FC7 Intellij IDEA \u8FDE\u63A5 MySQL",slug:"\u5982\u4F55\u901A\u8FC7-intellij-idea-\u8FDE\u63A5-mysql",children:[]},{level:2,title:"Spring Boot \u6574\u5408 Druid",slug:"spring-boot-\u6574\u5408-druid",children:[]},{level:2,title:"\u6E90\u7801\u5730\u5740",slug:"\u6E90\u7801\u5730\u5740",children:[]}],git:{createdTime:1651747783e3,updatedTime:1654860505e3,contributors:[{name:"itwanger",email:"www.qing_gee@163.com",commits:4}]},readingTime:{minutes:6.71,words:2014},filePathRelative:"springboot/mysql-druid.md"};export{t as data};
diff --git a/dist/assets/mysql-druid.html.adb4afdf.js b/dist/assets/mysql-druid.html.9707dc06.js
similarity index 67%
rename from dist/assets/mysql-druid.html.adb4afdf.js
rename to dist/assets/mysql-druid.html.9707dc06.js
index 94ad3d5b..a604f48f 100644
--- a/dist/assets/mysql-druid.html.adb4afdf.js
+++ b/dist/assets/mysql-druid.html.9707dc06.js
@@ -1,4 +1,4 @@
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\u7528\u6237\u7684\u8BDD\uFF0C\u5B89\u88C5\u6B65\u9AA4\u53C2\u7167\u4E0B\u9762\u7684\u6587\u6863\u3002",-1),E={href:"https://dev.mysql.com/doc/refman/8.0/en/macos-installation-pkg.html",target:"_blank",rel:"noopener noreferrer"},A=s("https://dev.mysql.com/doc/refman/8.0/en/macos-installation-pkg.html"),C=o(`<p>Windows \u548C macOS \u7684\u5B89\u88C5\u90FD\u975E\u5E38\u7684\u7B80\u5355\uFF0C\u4E3B\u8981\u5C31\u662F\u4E0B\u8F7D\u5BF9\u5E94\u64CD\u4F5C\u7CFB\u7EDF\u7684 MySQL \u5305\u5B89\u88C5\u7BA1\u7406\u5668\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/mysql-druid-ab94f6df-2031-42ff-8746-b4ad5a4e3a81.png" alt=""></p><p>\u7136\u540E\u6309\u7167\u5305\u5B89\u88C5\u5411\u5BFC\u7684\u63D0\u793A\u4E00\u6B65\u6B65\u50BB\u74DC\u5F0F\u5B89\u88C5\u5373\u53EF\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/mysql-druid-e7031aec-74c5-4079-a6f3-97368c921620.png" alt=""></p><h3 id="spring-boot-\u6574\u5408-mysql-\u6570\u636E\u5E93" tabindex="-1"><a class="header-anchor" href="#spring-boot-\u6574\u5408-mysql-\u6570\u636E\u5E93" aria-hidden="true">#</a> Spring Boot \u6574\u5408 MySQL \u6570\u636E\u5E93</h3><p>Spring Boot \u6574\u5408 MySQL \u6570\u636E\u5E93\u975E\u5E38\u7B80\u5355\uFF0C\u53EA\u9700\u8981\u6DFB\u52A0 MySQL \u4F9D\u8D56\u5E76\u5728\u914D\u7F6E\u6587\u4EF6\u4E2D\u6DFB\u52A0\u6570\u636E\u5E93\u914D\u7F6E\u5373\u53EF\u3002\u6211\u4EEC\u53EF\u4EE5\u4E0D\u7528\u7F16\u5199\u539F\u59CB\u7684\u8BBF\u95EE\u6570\u636E\u5E93\u7684\u4EE3\u7801\uFF0C\u4E5F\u4E0D\u7528\u8C03\u7528 JDBC \u6216\u8005\u8FDE\u63A5\u6C60\u5C31\u53EF\u4EE5\u8BBF\u95EE MySQL\u3002</p><p>1\uFF09\u4F7F\u7528 Intellij IDEA \u65B0\u5EFA\u4E00\u4E2A Spring Boot \u9879\u76EE\uFF0C\u4F7F\u7528 Java 8 \u7248\u672C\u300C\u793E\u533A\u7248\u6CA1\u6709\u6B64\u529F\u80FD\uFF0C\u9700\u8981\u5230 (Spring initializr)[https://start.spring.io/]\uFF09\u751F\u6210\u9879\u76EE\u540E\u5BFC\u5165\uFF0C\u63A8\u8350\u4F7F\u7528\u65D7\u8230\u7248\uFF0C\u529F\u80FD\u66F4\u52A0\u5F3A\u5927\u300D\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/mysql-druid-d7765111-9dcb-4125-a87a-da1439a0a6cf.png" alt=""></p><p>\u6DFB\u52A0 MySQL \u7684 Java\u8FDE\u63A5\u9A71\u52A8\u4F9D\u8D56\u548C JDBC Starter\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/mysql-druid-201eb6fa-0a09-46d7-a555-3988bee92a9f.png" alt=""></p><p>\u5BF9\u5E94pom.xml\u6587\u4EF6\u4E2D\u7684\u4EE3\u7801\uFF1A</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
+import{_ as o}from"./plugin-vue_export-helper.21dcd24c.js";import{r as i,o as p,c as l,a as n,b as e,d as s,e as t}from"./app.615e41d8.js";const c={},r=n("h2",{id:"mysql-\u7B80\u4ECB",tabindex:"-1"},[n("a",{class:"header-anchor",href:"#mysql-\u7B80\u4ECB","aria-hidden":"true"},"#"),s(" MySQL \u7B80\u4ECB")],-1),d=n("p",null,"MySQL \u662F\u76EE\u524D\u9879\u76EE\u4E2D\u8FD0\u7528\u6700\u5E7F\u6CDB\u7684\u5173\u7CFB\u578B\u6570\u636E\u5E93\uFF0C\u65E0\u8BBA\u662F\u4E92\u8054\u7F51\u5927\u5382\uFF0C\u8FD8\u662F\u4E2D\u5C0F\u578B\u516C\u53F8\uFF0C\u51E0\u4E4E\u90FD\u5728\u7528\u3002",-1),u=n("p",null,"MySQL \u4F53\u79EF\u5C0F\u3001\u901F\u5EA6\u5FEB\u3001\u6E90\u7801\u5F00\u653E\uFF0C\u6240\u4EE5\u5E7F\u53D7\u5F00\u53D1\u8005\u559C\u7231\u3002",-1),m=n("p",null,"MySQL \u7684\u5B89\u88C5\u975E\u5E38\u7B80\u5355\uFF0C\u9488\u5BF9\u4E0D\u540C\u7684\u64CD\u4F5C\u7CFB\u7EDF\uFF0CMySQL 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\u800C\u4E0D\u7528\u62C5\u5FC3\u670D\u52A1\u91CD\u542F\u7684\u95EE\u9898\u3002\u6309\u7167\u6B65\u9AA4\u53C2\u7167\u4E0B\u9762\u7684\u6587\u6863\u3002",-1),f={href:"https://dev.mysql.com/doc/refman/8.0/en/linux-installation.html",target:"_blank",rel:"noopener noreferrer"},y=s("https://dev.mysql.com/doc/refman/8.0/en/linux-installation.html"),q=n("p",null,"\u4E5F\u53EF\u4EE5\u76F4\u63A5\u901A\u8FC7\u5B9D\u5854\u9762\u677F\u7684\u5F62\u5F0F\u6765\u5B89\u88C5\uFF0C\u8FD9\u6837\u66F4\u7701\u4E8B\u7701\u529B\u7701\u5FC3\u3002",-1),j=s("\u5B9D\u5854\u9762\u677F\u5B89\u88C5\u811A\u672C\u5730\u5740\uFF1A"),S={href:"https://www.bt.cn/new/download.html",target:"_blank",rel:"noopener noreferrer"},w=s("https://www.bt.cn/new/download.html"),x=n("p",null,[n("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/mysql-druid-89f6d126-b059-4511-b64d-720aa8df354f.png",alt:""})],-1),L=n("p",null,"\u5B89\u88C5\u5B8C\u6210\u540E\uFF0C\u5C31\u53EF\u4EE5\u5728\u6570\u636E\u5E93\u7BA1\u7406\u9875\u9762\u6DFB\u52A0\u6570\u636E\u5E93\u5E76\u4E14\u8FDB\u884C\u7BA1\u7406\u4E86\u3002",-1),I=n("p",null,[n("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/mysql-druid-86d80ab6-968e-42ec-a532-1eeb341779c1.png",alt:""})],-1),M=n("p",null,"\u5982\u679C\u662F Windows \u7528\u6237\u7684\u8BDD\uFF0C\u5B89\u88C5\u6B65\u9AA4\u53C2\u7167\u4E0B\u9762\u7684\u6587\u6863\u3002",-1),Q={href:"https://dev.mysql.com/doc/refman/8.0/en/windows-installation.html",target:"_blank",rel:"noopener noreferrer"},D=s("https://dev.mysql.com/doc/refman/8.0/en/windows-installation.html"),T=n("p",null,"\u5982\u679C\u662F macOS \u7528\u6237\u7684\u8BDD\uFF0C\u5B89\u88C5\u6B65\u9AA4\u53C2\u7167\u4E0B\u9762\u7684\u6587\u6863\u3002",-1),B={href:"https://dev.mysql.com/doc/refman/8.0/en/macos-installation-pkg.html",target:"_blank",rel:"noopener noreferrer"},N=s("https://dev.mysql.com/doc/refman/8.0/en/macos-installation-pkg.html"),E=t(`<p>Windows \u548C macOS \u7684\u5B89\u88C5\u90FD\u975E\u5E38\u7684\u7B80\u5355\uFF0C\u4E3B\u8981\u5C31\u662F\u4E0B\u8F7D\u5BF9\u5E94\u64CD\u4F5C\u7CFB\u7EDF\u7684 MySQL \u5305\u5B89\u88C5\u7BA1\u7406\u5668\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/mysql-druid-ab94f6df-2031-42ff-8746-b4ad5a4e3a81.png" alt=""></p><p>\u7136\u540E\u6309\u7167\u5305\u5B89\u88C5\u5411\u5BFC\u7684\u63D0\u793A\u4E00\u6B65\u6B65\u50BB\u74DC\u5F0F\u5B89\u88C5\u5373\u53EF\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/mysql-druid-e7031aec-74c5-4079-a6f3-97368c921620.png" alt=""></p><h2 id="spring-boot-\u6574\u5408-mysql-\u6570\u636E\u5E93" tabindex="-1"><a class="header-anchor" href="#spring-boot-\u6574\u5408-mysql-\u6570\u636E\u5E93" aria-hidden="true">#</a> Spring Boot \u6574\u5408 MySQL \u6570\u636E\u5E93</h2><p>Spring Boot \u6574\u5408 MySQL \u6570\u636E\u5E93\u975E\u5E38\u7B80\u5355\uFF0C\u53EA\u9700\u8981\u6DFB\u52A0 MySQL \u4F9D\u8D56\u5E76\u5728\u914D\u7F6E\u6587\u4EF6\u4E2D\u6DFB\u52A0\u6570\u636E\u5E93\u914D\u7F6E\u5373\u53EF\u3002\u6211\u4EEC\u53EF\u4EE5\u4E0D\u7528\u7F16\u5199\u539F\u59CB\u7684\u8BBF\u95EE\u6570\u636E\u5E93\u7684\u4EE3\u7801\uFF0C\u4E5F\u4E0D\u7528\u8C03\u7528 JDBC \u6216\u8005\u8FDE\u63A5\u6C60\u5C31\u53EF\u4EE5\u8BBF\u95EE MySQL\u3002</p><p>1\uFF09\u4F7F\u7528 Intellij IDEA \u65B0\u5EFA\u4E00\u4E2A Spring Boot \u9879\u76EE\uFF0C\u4F7F\u7528 Java 8 \u7248\u672C\u300C\u793E\u533A\u7248\u6CA1\u6709\u6B64\u529F\u80FD\uFF0C\u9700\u8981\u5230 (Spring initializr)[https://start.spring.io/]\uFF09\u751F\u6210\u9879\u76EE\u540E\u5BFC\u5165\uFF0C\u63A8\u8350\u4F7F\u7528\u65D7\u8230\u7248\uFF0C\u529F\u80FD\u66F4\u52A0\u5F3A\u5927\u300D\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/mysql-druid-d7765111-9dcb-4125-a87a-da1439a0a6cf.png" alt=""></p><p>\u6DFB\u52A0 MySQL \u7684 Java\u8FDE\u63A5\u9A71\u52A8\u4F9D\u8D56\u548C JDBC Starter\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/mysql-druid-201eb6fa-0a09-46d7-a555-3988bee92a9f.png" alt=""></p><p>\u5BF9\u5E94pom.xml\u6587\u4EF6\u4E2D\u7684\u4EE3\u7801\uFF1A</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
     &lt;groupId&gt;mysql&lt;/groupId&gt;
     &lt;artifactId&gt;mysql-connector-java&lt;/artifactId&gt;
     &lt;scope&gt;runtime&lt;/scope&gt;
@@ -66,9 +66,9 @@ COMMIT;
         log<span class="token punctuation">.</span><span class="token function">info</span><span class="token punctuation">(</span><span class="token string">&quot;\u7528\u6237{}&quot;</span><span class="token punctuation">,</span>users<span class="token punctuation">)</span><span class="token punctuation">;</span>
     <span class="token punctuation">}</span>
 <span class="token punctuation">}</span>
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>Spring Boot \u7684\u6D4B\u8BD5\u7C7B\u4E3B\u8981\u653E\u7F6E\u5728 <code>src/test/java</code> \u76EE\u5F55\u4E0B\u9762\uFF0C\u9879\u76EE\u521B\u5EFA\u6210\u529F\u540E\uFF0CSpring Boot \u4F1A\u6839\u636E\u9879\u76EE\u540D\u79F0\u81EA\u52A8\u4E3A\u6211\u4EEC\u751F\u6210\u6D4B\u8BD5\u7C7B\u3002</p><p>\u6BD4\u5982\u8BF4\u672C\u6B21\u9879\u76EE\u540D\u4E3A codingmore-mysql\uFF0C\u90A3\u4E48\u6D4B\u8BD5\u7C7B\u540D\u4E3A CodingmoreMysqlApplicationTests\u3002</p><p><code>@SpringBootTest</code> \u6CE8\u89E3\u80FD\u591F\u6D4B\u8BD5\u6211\u4EEC\u7684\u9879\u76EE\u4E3B\u7C7B\uFF0C\u8BE5\u9879\u76EE\u4E3A CodingmoreMysqlApplication\u3002</p><p><code>@Test</code> \u6CE8\u89E3\u662F junit \u5355\u5143\u6D4B\u8BD5\u7684\u6CE8\u89E3\uFF0C\u8868\u793A\u8BE5\u65B9\u6CD5\u4E3A\u6D4B\u8BD5\u65B9\u6CD5\u3002</p><p><code>JdbcTemplate</code> \u4E00\u4E2A\u901A\u8FC7 JDBC \u8FDE\u63A5\u6570\u636E\u5E93\u7684\u5DE5\u5177\u7C7B\uFF0Cspring-boot-starter-jdbc \u4F9D\u8D56\u4E2D\u5305\u542B\u4E86\u8BE5\u7C7B\u3002</p><p><code>@Resource</code> \u6CE8\u89E3\u4F1A\u5E2E\u6211\u4EEC\u5728 Spring Boot \u542F\u52A8\u7684\u65F6\u5019\u6CE8\u5165\u4E00\u4E2A JdbcTemplate \u7684\u5BF9\u8C61\u3002</p><p><code>jdbcTemplate.query()</code> \u65B9\u6CD5\u901A\u8FC7 SQL \u8BED\u53E5\u548C\u533F\u540D\u5185\u90E8\u7C7B\u53C2\u6570\u7684\u5F62\u5F0F\uFF0C\u6267\u884C SQL \u5E76\u67E5\u8BE2\u7ED3\u679C\u96C6\u3002</p><p><code>RowMapper</code> \u5C31\u662F\u67E5\u8BE2\u5230\u7684\u6BCF\u4E00\u884C\u6570\u636E\u5BF9\u8C61\uFF0C\u6211\u4EEC\u53EF\u4EE5\u901A\u8FC7\u91CD\u5199 mapRow \u65B9\u6CD5\u5C06\u6570\u636E\u7ED3\u679C\u96C6\u5C01\u88C5\u5230 User \u5BF9\u8C61\u4E0A\u3002</p><p>\u53F3\u952E\u83DC\u5355\u8FD0\u884C testMysql \u65B9\u6CD5\u5C31\u53EF\u4EE5\u5728\u65E5\u5FD7\u4E2D\u770B\u5230 SQL \u6267\u884C\u7684\u7ED3\u679C\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/mysql-druid-92a53c8e-e99a-4ca6-8ad1-f5ec4653da3b.png" alt=""></p><h3 id="\u5982\u4F55\u901A\u8FC7-navicat-\u8FDE\u63A5-mysql" tabindex="-1"><a class="header-anchor" href="#\u5982\u4F55\u901A\u8FC7-navicat-\u8FDE\u63A5-mysql" aria-hidden="true">#</a> \u5982\u4F55\u901A\u8FC7 Navicat \u8FDE\u63A5 MySQL</h3><p>Navicat \u662F\u4E00\u4E2A\u4ECE\u6211\u53C2\u52A0\u5DE5\u4F5C\u5230\u73B0\u5728\u4E00\u76F4\u90FD\u5728\u7528\u7684 MySQL \u5BA2\u6237\u7AEF\u5DE5\u5177\uFF0C\u901A\u8FC7 Navicat \u53EF\u4EE5\u8F7B\u677E\u8FDE\u63A5\u6570\u636E\u5E93\uFF0C\u5E76\u6267\u884C\u589E\u5220\u6539\u67E5\u64CD\u4F5C\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/mysql-druid-2daef9fc-4a97-41bb-bd1c-875f468d90bc.png" alt=""></p><p>\u8FDE\u63A5\u6570\u636E\u5E93\u4E5F\u975E\u5E38\u7684\u7B80\u5355\uFF0C\u53EA\u9700\u8981\u586B\u5199\u4E3B\u673A IP \u5730\u5740\u3001\u7AEF\u53E3\u3001\u7528\u6237\u540D\u548C\u5BC6\u7801\u5373\u53EF\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/mysql-druid-18d120ea-0f84-4ca0-b0fd-020587e43fc4.png" alt=""></p><h3 id="\u5982\u4F55\u901A\u8FC7-intellij-idea-\u8FDE\u63A5-mysql" tabindex="-1"><a class="header-anchor" href="#\u5982\u4F55\u901A\u8FC7-intellij-idea-\u8FDE\u63A5-mysql" aria-hidden="true">#</a> \u5982\u4F55\u901A\u8FC7 Intellij IDEA \u8FDE\u63A5 MySQL</h3><p>\u9664\u4E86 Navicat\uFF0C\u8FD8\u53EF\u4EE5\u4F7F\u7528 Intellij IDEA \u76F4\u8FDE MySQL\u3002</p><p>\u70B9\u51FB\u300Cdatabase\u300D\u9762\u677F\uFF0C\u5728\u5DE6\u4E0A\u89D2\u9009\u62E9 + \u53F7\uFF0C\u9009\u62E9 DataSource\uFF0C\u518D\u9009\u62E9 MySQL\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/mysql-druid-070ab8b8-0629-4238-b35d-438dbcbb130e.png" alt=""></p><p>\u5728\u5F39\u51FA\u9762\u677F\u4E2D\u586B\u5199\u8FDE\u63A5\u4FE1\u606F\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/mysql-druid-29ba218a-7528-49bf-b2da-c5fa48b40d2b.png" alt=""></p><p>\u5982\u679C\u662F\u7B2C\u4E00\u6B21\u8FDE\u63A5 MySQL \u7684\u8BDD\uFF0C\u8BB0\u5F97\u70B9\u51FB\u300Cdownload\u300D\u4E0B\u8F7D MySQL \u9A71\u52A8\uFF0C\u4E4B\u540E\u70B9\u51FB\u300Ctest connection\u300D\u6D4B\u8BD5\u662F\u5426\u94FE\u63A5\u6210\u529F\uFF0C\u5982\u679C\u51FA\u73B0\u4EE5\u4E0B\u754C\u9762\uFF0C\u5219\u8868\u793A OK\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/mysql-druid-1b86d117-412c-47a2-82c8-c22f9bcf6455.png" alt=""></p><p>\u9009\u62E9\u53F3\u4FA7\u7684\u6570\u636E\u5E93\u8868\uFF0C\u53CC\u51FB\uFF0C\u5C31\u53EF\u4EE5\u67E5\u770B\u5230\u6570\u636E\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/mysql-druid-8c0288ae-ee22-4983-8d91-7ed7125b17a5.png" alt=""></p><p>\u5728\u300Cconsole\u300DSQL \u67E5\u8BE2\u9762\u677F\u91CC\u53EF\u4EE5\u7F16\u5199 SQL \u8BED\u53E5\u6765\u6267\u884C\u589E\u5220\u6539\u67E5\u64CD\u4F5C\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/mysql-druid-e1c9e85c-382a-40a8-a4fa-3fe32ee612fb.png" alt=""></p><h3 id="spring-boot-\u6574\u5408-druid" tabindex="-1"><a class="header-anchor" href="#spring-boot-\u6574\u5408-druid" aria-hidden="true">#</a> Spring Boot \u6574\u5408 Druid</h3><p>Druid \u662F\u963F\u91CC\u5DF4\u5DF4\u5F00\u6E90\u7684\u4E00\u6B3E\u6570\u636E\u5E93\u8FDE\u63A5\u6C60\uFF0C\u7ED3\u5408\u4E86C3P0\u3001DBCP \u7B49 DB \u6C60\u7684\u4F18\u70B9\uFF0C\u540C\u65F6\u8FD8\u52A0\u5165\u4E86\u65E5\u5FD7\u76D1\u63A7\u3002</p><p>Druid \u5728 GitHub \u4E0A\u5DF2\u7ECF\u6536\u83B7\u4E86 25.4k \u7684 star\uFF0C\u53EF\u4EE5\u8BF4\u975E\u5E38\u7684\u77E5\u540D\uFF0C\u4ECE\u7B80\u4ECB\u4E0A\u4E5F\u80FD\u770B\u5F97\u51FA\uFF0CDruid \u5C31\u662F\u4E3A\u4E86\u76D1\u63A7\u800C\u751F\u7684\u3002</p>`,57),R={href:"https://github.com/alibaba/druid/",target:"_blank",rel:"noopener noreferrer"},U=s("https://github.com/alibaba/druid/"),O=o(`<p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/mysql-druid-a1f53d5b-1048-4707-bebc-1a59d7793880.png" alt=""></p><p>Druid \u5305\u542B\u4E86\u4E09\u4E2A\u91CD\u8981\u7684\u7EC4\u6210\u90E8\u5206\uFF1A</p><ul><li>DruidDriver\uFF0C\u80FD\u591F\u63D0\u4F9B\u57FA\u4E8E Filter-Chain \u6A21\u5F0F\u7684\u63D2\u4EF6\u4F53\u7CFB\uFF1B</li><li>DruidDataSource\uFF0C\u9AD8\u6548\u53EF\u7BA1\u7406\u7684\u6570\u636E\u5E93\u8FDE\u63A5\u6C60\uFF1B</li><li>SQLParser\uFF0C\u652F\u6301\u6240\u6709 JDBC \u517C\u5BB9\u7684\u6570\u636E\u5E93\uFF0C\u5305\u62EC Oracle\u3001MySQL \u7B49\u3002</li></ul><p>Spring Boot2.0 \u4EE5\u4E0A\u9ED8\u8BA4\u4F7F\u7528\u7684\u662F Hikari \u8FDE\u63A5\u6C60\uFF0C\u6211\u4EEC\u4ECE\u4E4B\u524D\u7684\u65E5\u5FD7\u4FE1\u606F\u91CC\u5C31\u53EF\u4EE5\u770B\u5F97\u5230\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/mysql-druid-0982b47e-b211-41a6-ab88-355e1d2ae7be.png" alt=""></p><p>\u90A3\u5982\u679C\u6211\u4EEC\u60F3\u4F7F\u7528 Druid \u7684\u8BDD\uFF0C\u8BE5\u600E\u4E48\u6574\u5408\u5462\uFF1F</p><p>\u8FD9\u6B21\u6211\u4EEC\u76F4\u63A5\u5728\u7F16\u7A0B\u55B5\u9879\u76EE\u540E\u7AEF\u9879\u76EE codingmore-admin \u4E0A\u8FDB\u884C\u4FEE\u6539\u3002</p><p>\u7B2C\u4E00\u6B65\uFF0C\u5728 pom.xml \u6587\u4EF6\u4E2D\u6DFB\u52A0 Druid \u7684\u4F9D\u8D56\uFF0C\u5B98\u65B9\u5DF2\u7ECF\u63D0\u4F9B\u4E86 starter\uFF0C\u6211\u4EEC\u76F4\u63A5\u4F7F\u7528\u3002</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>Spring Boot \u7684\u6D4B\u8BD5\u7C7B\u4E3B\u8981\u653E\u7F6E\u5728 <code>src/test/java</code> \u76EE\u5F55\u4E0B\u9762\uFF0C\u9879\u76EE\u521B\u5EFA\u6210\u529F\u540E\uFF0CSpring Boot \u4F1A\u6839\u636E\u9879\u76EE\u540D\u79F0\u81EA\u52A8\u4E3A\u6211\u4EEC\u751F\u6210\u6D4B\u8BD5\u7C7B\u3002</p><p>\u6BD4\u5982\u8BF4\u672C\u6B21\u9879\u76EE\u540D\u4E3A codingmore-mysql\uFF0C\u90A3\u4E48\u6D4B\u8BD5\u7C7B\u540D\u4E3A CodingmoreMysqlApplicationTests\u3002</p><p><code>@SpringBootTest</code> \u6CE8\u89E3\u80FD\u591F\u6D4B\u8BD5\u6211\u4EEC\u7684\u9879\u76EE\u4E3B\u7C7B\uFF0C\u8BE5\u9879\u76EE\u4E3A CodingmoreMysqlApplication\u3002</p><p><code>@Test</code> \u6CE8\u89E3\u662F junit \u5355\u5143\u6D4B\u8BD5\u7684\u6CE8\u89E3\uFF0C\u8868\u793A\u8BE5\u65B9\u6CD5\u4E3A\u6D4B\u8BD5\u65B9\u6CD5\u3002</p><p><code>JdbcTemplate</code> \u4E00\u4E2A\u901A\u8FC7 JDBC \u8FDE\u63A5\u6570\u636E\u5E93\u7684\u5DE5\u5177\u7C7B\uFF0Cspring-boot-starter-jdbc \u4F9D\u8D56\u4E2D\u5305\u542B\u4E86\u8BE5\u7C7B\u3002</p><p><code>@Resource</code> \u6CE8\u89E3\u4F1A\u5E2E\u6211\u4EEC\u5728 Spring Boot \u542F\u52A8\u7684\u65F6\u5019\u6CE8\u5165\u4E00\u4E2A JdbcTemplate \u7684\u5BF9\u8C61\u3002</p><p><code>jdbcTemplate.query()</code> \u65B9\u6CD5\u901A\u8FC7 SQL \u8BED\u53E5\u548C\u533F\u540D\u5185\u90E8\u7C7B\u53C2\u6570\u7684\u5F62\u5F0F\uFF0C\u6267\u884C SQL \u5E76\u67E5\u8BE2\u7ED3\u679C\u96C6\u3002</p><p><code>RowMapper</code> \u5C31\u662F\u67E5\u8BE2\u5230\u7684\u6BCF\u4E00\u884C\u6570\u636E\u5BF9\u8C61\uFF0C\u6211\u4EEC\u53EF\u4EE5\u901A\u8FC7\u91CD\u5199 mapRow \u65B9\u6CD5\u5C06\u6570\u636E\u7ED3\u679C\u96C6\u5C01\u88C5\u5230 User \u5BF9\u8C61\u4E0A\u3002</p><p>\u53F3\u952E\u83DC\u5355\u8FD0\u884C testMysql \u65B9\u6CD5\u5C31\u53EF\u4EE5\u5728\u65E5\u5FD7\u4E2D\u770B\u5230 SQL \u6267\u884C\u7684\u7ED3\u679C\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/mysql-druid-92a53c8e-e99a-4ca6-8ad1-f5ec4653da3b.png" alt=""></p><h2 id="\u5982\u4F55\u901A\u8FC7-navicat-\u8FDE\u63A5-mysql" tabindex="-1"><a class="header-anchor" href="#\u5982\u4F55\u901A\u8FC7-navicat-\u8FDE\u63A5-mysql" aria-hidden="true">#</a> \u5982\u4F55\u901A\u8FC7 Navicat \u8FDE\u63A5 MySQL</h2><p>Navicat \u662F\u4E00\u4E2A\u4ECE\u6211\u53C2\u52A0\u5DE5\u4F5C\u5230\u73B0\u5728\u4E00\u76F4\u90FD\u5728\u7528\u7684 MySQL \u5BA2\u6237\u7AEF\u5DE5\u5177\uFF0C\u901A\u8FC7 Navicat \u53EF\u4EE5\u8F7B\u677E\u8FDE\u63A5\u6570\u636E\u5E93\uFF0C\u5E76\u6267\u884C\u589E\u5220\u6539\u67E5\u64CD\u4F5C\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/mysql-druid-2daef9fc-4a97-41bb-bd1c-875f468d90bc.png" alt=""></p><p>\u8FDE\u63A5\u6570\u636E\u5E93\u4E5F\u975E\u5E38\u7684\u7B80\u5355\uFF0C\u53EA\u9700\u8981\u586B\u5199\u4E3B\u673A IP \u5730\u5740\u3001\u7AEF\u53E3\u3001\u7528\u6237\u540D\u548C\u5BC6\u7801\u5373\u53EF\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/mysql-druid-18d120ea-0f84-4ca0-b0fd-020587e43fc4.png" alt=""></p><h2 id="\u5982\u4F55\u901A\u8FC7-intellij-idea-\u8FDE\u63A5-mysql" tabindex="-1"><a class="header-anchor" href="#\u5982\u4F55\u901A\u8FC7-intellij-idea-\u8FDE\u63A5-mysql" aria-hidden="true">#</a> \u5982\u4F55\u901A\u8FC7 Intellij IDEA \u8FDE\u63A5 MySQL</h2><p>\u9664\u4E86 Navicat\uFF0C\u8FD8\u53EF\u4EE5\u4F7F\u7528 Intellij IDEA \u76F4\u8FDE MySQL\u3002</p><p>\u70B9\u51FB\u300Cdatabase\u300D\u9762\u677F\uFF0C\u5728\u5DE6\u4E0A\u89D2\u9009\u62E9 + \u53F7\uFF0C\u9009\u62E9 DataSource\uFF0C\u518D\u9009\u62E9 MySQL\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/mysql-druid-070ab8b8-0629-4238-b35d-438dbcbb130e.png" alt=""></p><p>\u5728\u5F39\u51FA\u9762\u677F\u4E2D\u586B\u5199\u8FDE\u63A5\u4FE1\u606F\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/mysql-druid-29ba218a-7528-49bf-b2da-c5fa48b40d2b.png" alt=""></p><p>\u5982\u679C\u662F\u7B2C\u4E00\u6B21\u8FDE\u63A5 MySQL \u7684\u8BDD\uFF0C\u8BB0\u5F97\u70B9\u51FB\u300Cdownload\u300D\u4E0B\u8F7D MySQL \u9A71\u52A8\uFF0C\u4E4B\u540E\u70B9\u51FB\u300Ctest connection\u300D\u6D4B\u8BD5\u662F\u5426\u94FE\u63A5\u6210\u529F\uFF0C\u5982\u679C\u51FA\u73B0\u4EE5\u4E0B\u754C\u9762\uFF0C\u5219\u8868\u793A OK\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/mysql-druid-1b86d117-412c-47a2-82c8-c22f9bcf6455.png" alt=""></p><p>\u9009\u62E9\u53F3\u4FA7\u7684\u6570\u636E\u5E93\u8868\uFF0C\u53CC\u51FB\uFF0C\u5C31\u53EF\u4EE5\u67E5\u770B\u5230\u6570\u636E\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/mysql-druid-8c0288ae-ee22-4983-8d91-7ed7125b17a5.png" alt=""></p><p>\u5728\u300Cconsole\u300DSQL \u67E5\u8BE2\u9762\u677F\u91CC\u53EF\u4EE5\u7F16\u5199 SQL \u8BED\u53E5\u6765\u6267\u884C\u589E\u5220\u6539\u67E5\u64CD\u4F5C\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/mysql-druid-e1c9e85c-382a-40a8-a4fa-3fe32ee612fb.png" alt=""></p><h2 id="spring-boot-\u6574\u5408-druid" tabindex="-1"><a class="header-anchor" href="#spring-boot-\u6574\u5408-druid" aria-hidden="true">#</a> Spring Boot \u6574\u5408 Druid</h2><p>Druid \u662F\u963F\u91CC\u5DF4\u5DF4\u5F00\u6E90\u7684\u4E00\u6B3E\u6570\u636E\u5E93\u8FDE\u63A5\u6C60\uFF0C\u7ED3\u5408\u4E86C3P0\u3001DBCP \u7B49 DB \u6C60\u7684\u4F18\u70B9\uFF0C\u540C\u65F6\u8FD8\u52A0\u5165\u4E86\u65E5\u5FD7\u76D1\u63A7\u3002</p><p>Druid \u5728 GitHub \u4E0A\u5DF2\u7ECF\u6536\u83B7\u4E86 25.4k \u7684 star\uFF0C\u53EF\u4EE5\u8BF4\u975E\u5E38\u7684\u77E5\u540D\uFF0C\u4ECE\u7B80\u4ECB\u4E0A\u4E5F\u80FD\u770B\u5F97\u51FA\uFF0CDruid \u5C31\u662F\u4E3A\u4E86\u76D1\u63A7\u800C\u751F\u7684\u3002</p>`,57),A={href:"https://github.com/alibaba/druid/",target:"_blank",rel:"noopener noreferrer"},C=s("https://github.com/alibaba/druid/"),U=t(`<p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/mysql-druid-a1f53d5b-1048-4707-bebc-1a59d7793880.png" alt=""></p><p>Druid \u5305\u542B\u4E86\u4E09\u4E2A\u91CD\u8981\u7684\u7EC4\u6210\u90E8\u5206\uFF1A</p><ul><li>DruidDriver\uFF0C\u80FD\u591F\u63D0\u4F9B\u57FA\u4E8E Filter-Chain \u6A21\u5F0F\u7684\u63D2\u4EF6\u4F53\u7CFB\uFF1B</li><li>DruidDataSource\uFF0C\u9AD8\u6548\u53EF\u7BA1\u7406\u7684\u6570\u636E\u5E93\u8FDE\u63A5\u6C60\uFF1B</li><li>SQLParser\uFF0C\u652F\u6301\u6240\u6709 JDBC \u517C\u5BB9\u7684\u6570\u636E\u5E93\uFF0C\u5305\u62EC Oracle\u3001MySQL \u7B49\u3002</li></ul><p>Spring Boot2.0 \u4EE5\u4E0A\u9ED8\u8BA4\u4F7F\u7528\u7684\u662F Hikari \u8FDE\u63A5\u6C60\uFF0C\u6211\u4EEC\u4ECE\u4E4B\u524D\u7684\u65E5\u5FD7\u4FE1\u606F\u91CC\u5C31\u53EF\u4EE5\u770B\u5F97\u5230\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/mysql-druid-0982b47e-b211-41a6-ab88-355e1d2ae7be.png" alt=""></p><p>\u90A3\u5982\u679C\u6211\u4EEC\u60F3\u4F7F\u7528 Druid \u7684\u8BDD\uFF0C\u8BE5\u600E\u4E48\u6574\u5408\u5462\uFF1F</p><p>\u8FD9\u6B21\u6211\u4EEC\u76F4\u63A5\u5728\u7F16\u7A0B\u55B5\u9879\u76EE\u540E\u7AEF\u9879\u76EE codingmore-admin \u4E0A\u8FDB\u884C\u4FEE\u6539\u3002</p><p>\u7B2C\u4E00\u6B65\uFF0C\u5728 pom.xml \u6587\u4EF6\u4E2D\u6DFB\u52A0 Druid \u7684\u4F9D\u8D56\uFF0C\u5B98\u65B9\u5DF2\u7ECF\u63D0\u4F9B\u4E86 starter\uFF0C\u6211\u4EEC\u76F4\u63A5\u4F7F\u7528\u3002</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
     &lt;groupId&gt;com.alibaba&lt;/groupId&gt;
     &lt;artifactId&gt;druid-spring-boot-starter&lt;/artifactId&gt;
     &lt;version&gt;1.1.23&lt;/version&gt;
 &lt;/dependency&gt;
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>\u7B2C\u4E8C\u6B65\uFF0C\u5728 application.yml \u6587\u4EF6\u4E2D\u6DFB\u52A0 Druid \u914D\u7F6E\u3002</p><hr>`,11),J=s("\u66F4\u591A\u5185\u5BB9\uFF0C\u53EA\u9488\u5BF9\u300AJava \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF\u300B\u661F\u7403\u7528\u6237\u5F00\u653E\uFF0C\u9700\u8981\u7684\u5C0F\u4F19\u4F34\u53EF\u4EE5"),P=s("\u6233\u94FE\u63A5\u{1F517}"),V=s("\u52A0\u5165\u6211\u4EEC\u7684\u661F\u7403\uFF0C\u4E00\u8D77\u5B66\u4E60\uFF0C\u4E00\u8D77\u5377\u3002\u3002"),z=n("strong",null,"\u7F16\u7A0B\u55B5",-1),H=s("\u{1F431}\u662F\u4E00\u4E2A Spring Boot+Vue \u7684\u524D\u540E\u7AEF\u5206\u79BB\u9879\u76EE\uFF0C\u878D\u5408\u4E86\u5E02\u9762\u4E0A\u7EDD\u5927\u591A\u6570\u6D41\u884C\u7684\u6280\u672F\u8981\u70B9\u3002\u901A\u8FC7\u5B66\u4E60\u5B9E\u6218\u9879\u76EE\uFF0C\u4F60\u53EF\u4EE5\u5C06\u6240\u5B66\u7684\u77E5\u8BC6\u901A\u8FC7\u5B9E\u8DF5\u8FDB\u884C\u68C0\u9A8C\u3001\u4F60\u53EF\u4EE5\u62D3\u5BBD\u81EA\u5DF1\u7684\u6280\u672F\u8FB9\u754C\uFF0C\u4F60\u53EF\u4EE5\u638C\u63E1\u4E00\u4E2A\u771F\u6B63\u7684\u5B9E\u6218\u9879\u76EE\u662F\u5982\u4F55\u4ECE 0 \u5230 1 \u7684\u3002"),F=n("hr",null,null,-1),G=n("h3",{id:"\u6E90\u7801\u5730\u5740",tabindex:"-1"},[n("a",{class:"header-anchor",href:"#\u6E90\u7801\u5730\u5740","aria-hidden":"true"},"#"),s(" \u6E90\u7801\u5730\u5740")],-1),Y=s("\u7F16\u7A0B\u55B5 GitHub\uFF1A"),K={href:"https://github.com/itwanger/coding-more",target:"_blank",rel:"noopener noreferrer"},W=s("https://github.com/itwanger/coding-more"),Z=s("codingmore-learn\uFF1A"),X={href:"https://github.com/itwanger/codingmore-learning",target:"_blank",rel:"noopener noreferrer"},$=s("https://github.com/itwanger/codingmore-learning"),nn=n("hr",null,null,-1),sn=n("p",null,[n("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png",alt:""})],-1);function an(en,tn){const e=t("ExternalLinkIcon"),i=t("RouterLink");return l(),c("div",null,[u,m,b,v,g,k,n("blockquote",null,[n("p",null,[n("a",h,[_,a(e)])])]),f,y,n("blockquote",null,[n("p",null,[n("a",q,[S,a(e)])])]),j,n("blockquote",null,[n("p",null,[w,n("a",x,[L,a(e)])])]),I,M,Q,D,n("blockquote",null,[n("p",null,[n("a",T,[B,a(e)])])]),N,n("blockquote",null,[n("p",null,[n("a",E,[A,a(e)])])]),C,n("blockquote",null,[n("p",null,[n("a",R,[U,a(e)])])]),O,n("p",null,[J,a(i,{to:"/springboot/docs/zhishixingqiu/"},{default:r(()=>[P]),_:1}),V,z,H]),F,G,n("blockquote",null,[n("ul",null,[n("li",null,[Y,n("a",K,[W,a(e)])]),n("li",null,[Z,n("a",X,[$,a(e)])])])]),nn,sn])}var ln=p(d,[["render",an],["__file","mysql-druid.html.vue"]]);export{ln as default};
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>\u7B2C\u4E8C\u6B65\uFF0C\u5728 application.yml \u6587\u4EF6\u4E2D\u6DFB\u52A0 Druid \u914D\u7F6E\u3002</p><hr>`,11),R=s("\u66F4\u591A\u5185\u5BB9\uFF0C\u53EA\u9488\u5BF9\u300AJava \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF\u300B\u661F\u7403\u7528\u6237\u5F00\u653E\uFF0C\u9700\u8981\u7684\u5C0F\u4F19\u4F34\u53EF\u4EE5"),O={href:"https://tobebetterjavaer.com/zhishixingqiu/",target:"_blank",rel:"noopener noreferrer"},J=s("\u6233\u94FE\u63A5\u{1F517}"),P=s("\u52A0\u5165\u6211\u4EEC\u7684\u661F\u7403\uFF0C\u4E00\u8D77\u5B66\u4E60\uFF0C\u4E00\u8D77\u5377\u3002\u3002"),V=n("strong",null,"\u7F16\u7A0B\u55B5",-1),z=s("\u{1F431}\u662F\u4E00\u4E2A Spring Boot+Vue \u7684\u524D\u540E\u7AEF\u5206\u79BB\u9879\u76EE\uFF0C\u878D\u5408\u4E86\u5E02\u9762\u4E0A\u7EDD\u5927\u591A\u6570\u6D41\u884C\u7684\u6280\u672F\u8981\u70B9\u3002\u901A\u8FC7\u5B66\u4E60\u5B9E\u6218\u9879\u76EE\uFF0C\u4F60\u53EF\u4EE5\u5C06\u6240\u5B66\u7684\u77E5\u8BC6\u901A\u8FC7\u5B9E\u8DF5\u8FDB\u884C\u68C0\u9A8C\u3001\u4F60\u53EF\u4EE5\u62D3\u5BBD\u81EA\u5DF1\u7684\u6280\u672F\u8FB9\u754C\uFF0C\u4F60\u53EF\u4EE5\u638C\u63E1\u4E00\u4E2A\u771F\u6B63\u7684\u5B9E\u6218\u9879\u76EE\u662F\u5982\u4F55\u4ECE 0 \u5230 1 \u7684\u3002"),H=n("hr",null,null,-1),F=n("h2",{id:"\u6E90\u7801\u5730\u5740",tabindex:"-1"},[n("a",{class:"header-anchor",href:"#\u6E90\u7801\u5730\u5740","aria-hidden":"true"},"#"),s(" \u6E90\u7801\u5730\u5740")],-1),G=s("\u7F16\u7A0B\u55B5 GitHub\uFF1A"),Y={href:"https://github.com/itwanger/coding-more",target:"_blank",rel:"noopener noreferrer"},K=s("https://github.com/itwanger/coding-more"),W=s("codingmore-mysql-druid\uFF1A"),Z={href:"https://github.com/itwanger/codingmore-learning/tree/main/codingmore-mysql",target:"_blank",rel:"noopener noreferrer"},X=s("https://github.com/itwanger/codingmore-learning"),$=n("hr",null,null,-1),nn=n("p",null,[n("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png",alt:""})],-1);function sn(an,en){const a=i("ExternalLinkIcon");return p(),l("div",null,[r,d,u,m,b,v,n("blockquote",null,[n("p",null,[n("a",g,[k,e(a)])])]),h,_,n("blockquote",null,[n("p",null,[n("a",f,[y,e(a)])])]),q,n("blockquote",null,[n("p",null,[j,n("a",S,[w,e(a)])])]),x,L,I,M,n("blockquote",null,[n("p",null,[n("a",Q,[D,e(a)])])]),T,n("blockquote",null,[n("p",null,[n("a",B,[N,e(a)])])]),E,n("blockquote",null,[n("p",null,[n("a",A,[C,e(a)])])]),U,n("p",null,[R,n("a",O,[J,e(a)]),P,V,z]),H,F,n("blockquote",null,[n("ul",null,[n("li",null,[G,n("a",Y,[K,e(a)])]),n("li",null,[W,n("a",Z,[X,e(a)])])])]),$,nn])}var pn=o(c,[["render",sn],["__file","mysql-druid.html.vue"]]);export{pn as default};
diff --git a/dist/assets/mysql.html.ecb0e241.js b/dist/assets/mysql.html.1afcd596.js
similarity index 99%
rename from dist/assets/mysql.html.ecb0e241.js
rename to dist/assets/mysql.html.1afcd596.js
index 7a5a8bfd..0c87c65e 100644
--- a/dist/assets/mysql.html.ecb0e241.js
+++ b/dist/assets/mysql.html.1afcd596.js
@@ -1,4 +1,4 @@
-import{_ as a}from"./plugin-vue_export-helper.21dcd24c.js";import{r as n,o,c as d,a as i,b as r,d as l,e as h}from"./app.a0271b9c.js";const t={},s=i("h1",{id:"\u7CBE\u9009\u6570\u636E\u5E9360\u9053\u9762\u8BD5\u9898\u5FC5\u770B",tabindex:"-1"},[i("a",{class:"header-anchor",href:"#\u7CBE\u9009\u6570\u636E\u5E9360\u9053\u9762\u8BD5\u9898\u5FC5\u770B","aria-hidden":"true"},"#"),l(" \u7CBE\u9009\u6570\u636E\u5E9360\u9053\u9762\u8BD5\u9898\u5FC5\u770B\u{1F44D}")],-1),c=l("\u56FE\u6587\u8BE6\u89E3 60 \u9053 MySQL \u9762\u8BD5\u9AD8\u9891\u9898\uFF0C\u8FD9\u6B21\u540A\u6253\u9762\u8BD5\u5B98\uFF0C\u6211\u89C9\u5F97\u7A33\u4E86\uFF08\u624B\u52A8 dog\uFF09\u3002\u6574\u7406\uFF1A\u6C89\u9ED8\u738B\u4E8C\uFF0C\u6233"),u={href:"https://mp.weixin.qq.com/s/c-sy7tM0BmrqMUQFW7C65g",target:"_blank",rel:"noopener noreferrer"},g=l("\u8F6C\u8F7D\u94FE\u63A5"),p=l("\uFF0C\u91CC\u9762\u6709\u5C40\u8BE6\u7EC6\u7684\u601D\u7EF4\u5BFC\u56FE\uFF1B\u4F5C\u8005\uFF1Aherongwei\uFF0C\u6233"),b={href:"https://mp.weixin.qq.com/s/-SqqKmhZcOlQxM-rHiIpKg",target:"_blank",rel:"noopener noreferrer"},_=l("\u539F\u6587\u94FE\u63A5"),f=l("\u3002"),m=h(`<h2 id="\u57FA\u7840" tabindex="-1"><a class="header-anchor" href="#\u57FA\u7840" aria-hidden="true">#</a> \u57FA\u7840</h2><h3 id="_1\u3001\u5173\u7CFB\u578B\u548C\u975E\u5173\u7CFB\u578B\u6570\u636E\u5E93\u7684\u533A\u522B" tabindex="-1"><a class="header-anchor" href="#_1\u3001\u5173\u7CFB\u578B\u548C\u975E\u5173\u7CFB\u578B\u6570\u636E\u5E93\u7684\u533A\u522B" aria-hidden="true">#</a> 1\u3001\u5173\u7CFB\u578B\u548C\u975E\u5173\u7CFB\u578B\u6570\u636E\u5E93\u7684\u533A\u522B\uFF1F</h3><p>\u5173\u7CFB\u578B\u6570\u636E\u5E93\u7684\u4F18\u70B9</p><ul><li>\u5BB9\u6613\u7406\u89E3\uFF0C\u56E0\u4E3A\u5B83\u91C7\u7528\u4E86\u5173\u7CFB\u6A21\u578B\u6765\u7EC4\u7EC7\u6570\u636E\u3002</li><li>\u53EF\u4EE5\u4FDD\u6301\u6570\u636E\u7684\u4E00\u81F4\u6027\u3002</li><li>\u6570\u636E\u66F4\u65B0\u7684\u5F00\u9500\u6BD4\u8F83\u5C0F\u3002</li><li>\u652F\u6301\u590D\u6742\u67E5\u8BE2\uFF08\u5E26 where \u5B50\u53E5\u7684\u67E5\u8BE2\uFF09</li></ul><p>\u975E\u5173\u7CFB\u578B\u6570\u636E\u5E93\uFF08NOSQL\uFF09\u7684\u4F18\u70B9</p><ul><li>\u65E0\u9700\u7ECF\u8FC7 SQL \u5C42\u7684\u89E3\u6790\uFF0C\u8BFB\u5199\u6548\u7387\u9AD8\u3002</li><li>\u57FA\u4E8E\u952E\u503C\u5BF9\uFF0C\u8BFB\u5199\u6027\u80FD\u5F88\u9AD8\uFF0C\u6613\u4E8E\u6269\u5C55</li><li>\u53EF\u4EE5\u652F\u6301\u591A\u79CD\u7C7B\u578B\u6570\u636E\u7684\u5B58\u50A8\uFF0C\u5982\u56FE\u7247\uFF0C\u6587\u6863\u7B49\u7B49\u3002</li><li>\u6269\u5C55\uFF08\u53EF\u5206\u4E3A\u5185\u5B58\u6027\u6570\u636E\u5E93\u4EE5\u53CA\u6587\u6863\u578B\u6570\u636E\u5E93\uFF0C\u6BD4\u5982 Redis\uFF0CMongoDB\uFF0CHBase \u7B49\uFF0C\u9002\u5408\u573A\u666F\uFF1A\u6570\u636E\u91CF\u5927\u9AD8\u53EF\u7528\u7684\u65E5\u5FD7\u7CFB\u7EDF/\u5730\u7406\u4F4D\u7F6E\u5B58\u50A8\u7CFB\u7EDF\uFF09\u3002</li></ul><h3 id="_2\u3001\u8BE6\u7EC6\u8BF4\u4E00\u4E0B\u4E00\u6761-mysql-\u8BED\u53E5\u6267\u884C\u7684\u6B65\u9AA4" tabindex="-1"><a class="header-anchor" href="#_2\u3001\u8BE6\u7EC6\u8BF4\u4E00\u4E0B\u4E00\u6761-mysql-\u8BED\u53E5\u6267\u884C\u7684\u6B65\u9AA4" aria-hidden="true">#</a> 2\u3001\u8BE6\u7EC6\u8BF4\u4E00\u4E0B\u4E00\u6761 MySQL \u8BED\u53E5\u6267\u884C\u7684\u6B65\u9AA4</h3><p>Server \u5C42\u6309\u987A\u5E8F\u6267\u884C SQL \u7684\u6B65\u9AA4\u4E3A\uFF1A</p><ul><li>\u5BA2\u6237\u7AEF\u8BF7\u6C42 -&gt; \u8FDE\u63A5\u5668\uFF08\u9A8C\u8BC1\u7528\u6237\u8EAB\u4EFD\uFF0C\u7ED9\u4E88\u6743\u9650\uFF09</li><li>\u67E5\u8BE2\u7F13\u5B58\uFF08\u5B58\u5728\u7F13\u5B58\u5219\u76F4\u63A5\u8FD4\u56DE\uFF0C\u4E0D\u5B58\u5728\u5219\u6267\u884C\u540E\u7EED\u64CD\u4F5C\uFF09</li><li>\u5206\u6790\u5668\uFF08\u5BF9 SQL \u8FDB\u884C\u8BCD\u6CD5\u5206\u6790\u548C\u8BED\u6CD5\u5206\u6790\u64CD\u4F5C\uFF09</li><li>\u4F18\u5316\u5668\uFF08\u4E3B\u8981\u5BF9\u6267\u884C\u7684 SQL \u4F18\u5316\u9009\u62E9\u6700\u4F18\u7684\u6267\u884C\u65B9\u6848\u65B9\u6CD5\uFF09</li><li>\u6267\u884C\u5668\uFF08\u6267\u884C\u65F6\u4F1A\u5148\u770B\u7528\u6237\u662F\u5426\u6709\u6267\u884C\u6743\u9650\uFF0C\u6709\u624D\u53BB\u4F7F\u7528\u8FD9\u4E2A\u5F15\u64CE\u63D0\u4F9B\u7684\u63A5\u53E3\uFF09-&gt; \u53BB\u5F15\u64CE\u5C42\u83B7\u53D6\u6570\u636E\u8FD4\u56DE\uFF08\u5982\u679C\u5F00\u542F\u67E5\u8BE2\u7F13\u5B58\u5219\u4F1A\u7F13\u5B58\u67E5\u8BE2\u7ED3\u679C\uFF09</li></ul><h2 id="\u7D22\u5F15\u76F8\u5173" tabindex="-1"><a class="header-anchor" href="#\u7D22\u5F15\u76F8\u5173" aria-hidden="true">#</a> \u7D22\u5F15\u76F8\u5173</h2><h3 id="_3\u3001mysql-\u4F7F\u7528\u7D22\u5F15\u7684\u539F\u56E0" tabindex="-1"><a class="header-anchor" href="#_3\u3001mysql-\u4F7F\u7528\u7D22\u5F15\u7684\u539F\u56E0" aria-hidden="true">#</a> 3\u3001MySQL \u4F7F\u7528\u7D22\u5F15\u7684\u539F\u56E0\uFF1F</h3><p>\u6839\u672C\u539F\u56E0</p><ul><li>\u7D22\u5F15\u7684\u51FA\u73B0\uFF0C\u5C31\u662F\u4E3A\u4E86\u63D0\u9AD8\u6570\u636E\u67E5\u8BE2\u7684\u6548\u7387\uFF0C\u5C31\u50CF\u4E66\u7684\u76EE\u5F55\u4E00\u6837\u3002</li><li>\u5BF9\u4E8E\u6570\u636E\u5E93\u7684\u8868\u800C\u8A00\uFF0C\u7D22\u5F15\u5176\u5B9E\u5C31\u662F\u5B83\u7684\u201C\u76EE\u5F55\u201D\u3002</li></ul><p>\u6269\u5C55</p><ul><li>\u521B\u5EFA\u552F\u4E00\u6027\u7D22\u5F15\uFF0C\u53EF\u4EE5\u4FDD\u8BC1\u6570\u636E\u5E93\u8868\u4E2D\u6BCF\u4E00\u884C\u6570\u636E\u7684\u552F\u4E00\u6027\u3002</li><li>\u5E2E\u52A9\u5F15\u64CE\u5C42\u907F\u514D\u6392\u5E8F\u548C\u4E34\u65F6\u8868</li><li>\u5C06\u968F\u673A IO \u53D8\u4E3A\u987A\u5E8F IO\uFF0C\u52A0\u901F\u8868\u548C\u8868\u4E4B\u95F4\u7684\u8FDE\u63A5\u3002</li></ul><h3 id="_4\u3001\u7D22\u5F15\u7684\u4E09\u79CD\u5E38\u89C1\u5E95\u5C42\u6570\u636E\u7ED3\u6784\u4EE5\u53CA\u4F18\u7F3A\u70B9" tabindex="-1"><a class="header-anchor" href="#_4\u3001\u7D22\u5F15\u7684\u4E09\u79CD\u5E38\u89C1\u5E95\u5C42\u6570\u636E\u7ED3\u6784\u4EE5\u53CA\u4F18\u7F3A\u70B9" aria-hidden="true">#</a> 4\u3001\u7D22\u5F15\u7684\u4E09\u79CD\u5E38\u89C1\u5E95\u5C42\u6570\u636E\u7ED3\u6784\u4EE5\u53CA\u4F18\u7F3A\u70B9</h3><p>\u4E09\u79CD\u5E38\u89C1\u7684\u7D22\u5F15\u5E95\u5C42\u6570\u636E\u7ED3\u6784\uFF1A\u5206\u522B\u662F\u54C8\u5E0C\u8868\u3001\u6709\u5E8F\u6570\u7EC4\u548C\u641C\u7D22\u6811\u3002</p><ul><li>\u54C8\u5E0C\u8868\u8FD9\u79CD\u9002\u7528\u4E8E\u7B49\u503C\u67E5\u8BE2\u7684\u573A\u666F\uFF0C\u6BD4\u5982 memcached \u4EE5\u53CA\u5176\u5B83\u4E00\u4E9B NoSQL \u5F15\u64CE\uFF0C\u4E0D\u9002\u5408\u8303\u56F4\u67E5\u8BE2\u3002</li><li>\u6709\u5E8F\u6570\u7EC4\u7D22\u5F15\u53EA\u9002\u7528\u4E8E\u9759\u6001\u5B58\u50A8\u5F15\u64CE\uFF0C\u7B49\u503C\u548C\u8303\u56F4\u67E5\u8BE2\u6027\u80FD\u597D\uFF0C\u4F46\u66F4\u65B0\u6570\u636E\u6210\u672C\u9AD8\u3002</li><li>N \u53C9\u6811\u7531\u4E8E\u8BFB\u5199\u4E0A\u7684\u6027\u80FD\u4F18\u70B9\u4EE5\u53CA\u9002\u914D\u78C1\u76D8\u8BBF\u95EE\u6A21\u5F0F\u4EE5\u53CA\u5E7F\u6CDB\u5E94\u7528\u5728\u6570\u636E\u5E93\u5F15\u64CE\u4E2D\u3002</li><li>\u6269\u5C55\uFF08\u4EE5 InnoDB \u7684\u4E00\u4E2A\u6574\u6570\u5B57\u6BB5\u7D22\u5F15\u4E3A\u4F8B\uFF0C\u8FD9\u4E2A N \u5DEE\u4E0D\u591A\u662F 1200\u3002\u68F5\u6811\u9AD8\u662F 4 \u7684\u65F6\u5019\uFF0C\u5C31\u53EF\u4EE5\u5B58 1200 \u7684 3 \u6B21\u65B9\u4E2A\u503C\uFF0C\u8FD9\u5DF2\u7ECF 17 \u4EBF\u4E86\u3002\u8003\u8651\u5230\u6811\u6839\u7684\u6570\u636E\u5757\u603B\u662F\u5728\u5185\u5B58\u4E2D\u7684\uFF0C\u4E00\u4E2A 10 \u4EBF\u884C\u7684\u8868\u4E0A\u4E00\u4E2A\u6574\u6570\u5B57\u6BB5\u7684\u7D22\u5F15\uFF0C\u67E5\u627E\u4E00\u4E2A\u503C\u6700\u591A\u53EA\u9700\u8981\u8BBF\u95EE 3 \u6B21\u78C1\u76D8\u3002\u5176\u5B9E\uFF0C\u6811\u7684\u7B2C\u4E8C\u5C42\u4E5F\u6709\u5F88\u5927\u6982\u7387\u5728\u5185\u5B58\u4E2D\uFF0C\u90A3\u4E48\u8BBF\u95EE\u78C1\u76D8\u7684\u5E73\u5747\u6B21\u6570\u5C31\u66F4\u5C11\u4E86\u3002\uFF09</li></ul><h3 id="_5\u3001\u7D22\u5F15\u7684\u5E38\u89C1\u7C7B\u578B\u4EE5\u53CA\u5B83\u662F\u5982\u4F55\u53D1\u6325\u4F5C\u7528\u7684" tabindex="-1"><a class="header-anchor" href="#_5\u3001\u7D22\u5F15\u7684\u5E38\u89C1\u7C7B\u578B\u4EE5\u53CA\u5B83\u662F\u5982\u4F55\u53D1\u6325\u4F5C\u7528\u7684" aria-hidden="true">#</a> 5\u3001\u7D22\u5F15\u7684\u5E38\u89C1\u7C7B\u578B\u4EE5\u53CA\u5B83\u662F\u5982\u4F55\u53D1\u6325\u4F5C\u7528\u7684\uFF1F</h3><p>\u6839\u636E\u53F6\u5B50\u8282\u70B9\u7684\u5185\u5BB9\uFF0C\u7D22\u5F15\u7C7B\u578B\u5206\u4E3A\u4E3B\u952E\u7D22\u5F15\u548C\u975E\u4E3B\u952E\u7D22\u5F15\u3002</p><ul><li>\u4E3B\u952E\u7D22\u5F15\u7684\u53F6\u5B50\u8282\u70B9\u5B58\u7684\u6574\u884C\u6570\u636E\uFF0C\u5728InnoDB\u91CC\u4E5F\u88AB\u79F0\u4E3A\u805A\u7C07\u7D22\u5F15\u3002</li><li>\u975E\u4E3B\u952E\u7D22\u5F15\u53F6\u5B50\u8282\u70B9\u5B58\u7684\u4E3B\u952E\u7684\u503C\uFF0C\u5728InnoDB\u91CC\u4E5F\u88AB\u79F0\u4E3A\u4E8C\u7EA7\u7D22\u5F15\u3002</li></ul><h3 id="_6\u3001myisam-\u548C-innodb-\u5B9E\u73B0-b-\u6811\u7D22\u5F15\u65B9\u5F0F\u7684\u533A\u522B\u662F\u4EC0\u4E48" tabindex="-1"><a class="header-anchor" href="#_6\u3001myisam-\u548C-innodb-\u5B9E\u73B0-b-\u6811\u7D22\u5F15\u65B9\u5F0F\u7684\u533A\u522B\u662F\u4EC0\u4E48" aria-hidden="true">#</a> 6\u3001MyISAM \u548C InnoDB \u5B9E\u73B0 B \u6811\u7D22\u5F15\u65B9\u5F0F\u7684\u533A\u522B\u662F\u4EC0\u4E48\uFF1F</h3><ul><li>InnoDB \u5B58\u50A8\u5F15\u64CE\uFF1AB+ \u6811\u7D22\u5F15\u7684\u53F6\u5B50\u8282\u70B9\u4FDD\u5B58\u6570\u636E\u672C\u8EAB\uFF0C\u5176\u6570\u636E\u6587\u4EF6\u672C\u8EAB\u5C31\u662F\u7D22\u5F15\u6587\u4EF6\u3002</li><li>MyISAM \u5B58\u50A8\u5F15\u64CE\uFF1AB+ \u6811\u7D22\u5F15\u7684\u53F6\u5B50\u8282\u70B9\u4FDD\u5B58\u6570\u636E\u7684\u7269\u7406\u5730\u5740\uFF0C\u53F6\u8282\u70B9\u7684 data \u57DF\u5B58\u653E\u7684\u662F\u6570\u636E\u8BB0\u5F55\u7684\u5730\u5740\uFF0C\u7D22\u5F15\u6587\u4EF6\u548C\u6570\u636E\u6587\u4EF6\u662F\u5206\u79BB\u7684\u3002</li></ul><h3 id="_7\u3001innodb-\u4E3A\u4EC0\u4E48\u8BBE\u8BA1-b-\u6811\u7D22\u5F15" tabindex="-1"><a class="header-anchor" href="#_7\u3001innodb-\u4E3A\u4EC0\u4E48\u8BBE\u8BA1-b-\u6811\u7D22\u5F15" aria-hidden="true">#</a> 7\u3001InnoDB \u4E3A\u4EC0\u4E48\u8BBE\u8BA1 B+ \u6811\u7D22\u5F15\uFF1F</h3><p>\u4E24\u4E2A\u8003\u8651\u56E0\u7D20\uFF1A</p><ul><li>InnoDB \u9700\u8981\u6267\u884C\u7684\u573A\u666F\u548C\u529F\u80FD\u9700\u8981\u5728\u7279\u5B9A\u67E5\u8BE2\u4E0A\u62E5\u6709\u8F83\u5F3A\u7684\u6027\u80FD\u3002</li><li>CPU \u5C06\u78C1\u76D8\u4E0A\u7684\u6570\u636E\u52A0\u8F7D\u5230\u5185\u5B58\u4E2D\u9700\u8981\u82B1\u8D39\u5927\u91CF\u65F6\u95F4\u3002</li></ul><p>\u4E3A\u4EC0\u4E48\u9009\u62E9 B+ \u6811\uFF1A</p><ul><li><p>\u54C8\u5E0C\u7D22\u5F15\u867D\u7136\u80FD\u63D0\u4F9BO\uFF081\uFF09\u590D\u6742\u5EA6\u67E5\u8BE2\uFF0C\u4F46\u5BF9\u8303\u56F4\u67E5\u8BE2\u548C\u6392\u5E8F\u5374\u65E0\u6CD5\u5F88\u597D\u7684\u652F\u6301\uFF0C\u6700\u7EC8\u4F1A\u5BFC\u81F4\u5168\u8868\u626B\u63CF\u3002</p></li><li><p>B \u6811\u80FD\u591F\u5728\u975E\u53F6\u5B50\u8282\u70B9\u5B58\u50A8\u6570\u636E\uFF0C\u4F46\u4F1A\u5BFC\u81F4\u5728\u67E5\u8BE2\u8FDE\u7EED\u6570\u636E\u53EF\u80FD\u5E26\u6765\u66F4\u591A\u7684\u968F\u673A IO\u3002</p></li><li><p>\u800C B+ \u6811\u7684\u6240\u6709\u53F6\u8282\u70B9\u53EF\u4EE5\u901A\u8FC7\u6307\u9488\u6765\u76F8\u4E92\u8FDE\u63A5\uFF0C\u51CF\u5C11\u987A\u5E8F\u904D\u5386\u5E26\u6765\u7684\u968F\u673A IO\u3002</p></li><li><p>\u666E\u901A\u7D22\u5F15\u8FD8\u662F\u552F\u4E00\u7D22\u5F15\uFF1F</p><p>\u7531\u4E8E\u552F\u4E00\u7D22\u5F15\u7528\u4E0D\u4E0A change buffer \u7684\u4F18\u5316\u673A\u5236\uFF0C\u56E0\u6B64\u5982\u679C\u4E1A\u52A1\u53EF\u4EE5\u63A5\u53D7\uFF0C\u4ECE\u6027\u80FD\u89D2\u5EA6\u51FA\u53D1\u5EFA\u8BAE\u4F60\u4F18\u5148\u8003\u8651\u975E\u552F\u4E00\u7D22\u5F15\u3002</p></li></ul><h3 id="_8\u3001\u4EC0\u4E48\u662F\u8986\u76D6\u7D22\u5F15\u548C\u7D22\u5F15\u4E0B\u63A8" tabindex="-1"><a class="header-anchor" href="#_8\u3001\u4EC0\u4E48\u662F\u8986\u76D6\u7D22\u5F15\u548C\u7D22\u5F15\u4E0B\u63A8" aria-hidden="true">#</a> 8\u3001\u4EC0\u4E48\u662F\u8986\u76D6\u7D22\u5F15\u548C\u7D22\u5F15\u4E0B\u63A8\uFF1F</h3><p>\u8986\u76D6\u7D22\u5F15\uFF1A</p><ul><li><p>\u5728\u67D0\u4E2A\u67E5\u8BE2\u91CC\u9762\uFF0C\u7D22\u5F15 k \u5DF2\u7ECF\u201C\u8986\u76D6\u4E86\u201D\u6211\u4EEC\u7684\u67E5\u8BE2\u9700\u6C42\uFF0C\u79F0\u4E3A\u8986\u76D6\u7D22\u5F15\u3002</p></li><li><p>\u8986\u76D6\u7D22\u5F15\u53EF\u4EE5\u51CF\u5C11\u6811\u7684\u641C\u7D22\u6B21\u6570\uFF0C\u663E\u8457\u63D0\u5347\u67E5\u8BE2\u6027\u80FD\uFF0C\u6240\u4EE5\u4F7F\u7528\u8986\u76D6\u7D22\u5F15\u662F\u4E00\u4E2A\u5E38\u7528\u7684\u6027\u80FD\u4F18\u5316\u624B\u6BB5\u3002</p></li></ul><p>\u7D22\u5F15\u4E0B\u63A8\uFF1A</p><ul><li>MySQL 5.6 \u5F15\u5165\u7684\u7D22\u5F15\u4E0B\u63A8\u4F18\u5316\uFF08index condition pushdown)\uFF0C \u53EF\u4EE5\u5728\u7D22\u5F15\u904D\u5386\u8FC7\u7A0B\u4E2D\uFF0C\u5BF9\u7D22\u5F15\u4E2D\u5305\u542B\u7684\u5B57\u6BB5\u5148\u505A\u5224\u65AD\uFF0C\u76F4\u63A5\u8FC7\u6EE4\u6389\u4E0D\u6EE1\u8DB3\u6761\u4EF6\u7684\u8BB0\u5F55\uFF0C\u51CF\u5C11\u56DE\u8868\u6B21\u6570\u3002</li></ul><h3 id="_9\u3001\u54EA\u4E9B\u64CD\u4F5C\u4F1A\u5BFC\u81F4\u7D22\u5F15\u5931\u6548" tabindex="-1"><a class="header-anchor" href="#_9\u3001\u54EA\u4E9B\u64CD\u4F5C\u4F1A\u5BFC\u81F4\u7D22\u5F15\u5931\u6548" aria-hidden="true">#</a> 9\u3001\u54EA\u4E9B\u64CD\u4F5C\u4F1A\u5BFC\u81F4\u7D22\u5F15\u5931\u6548\uFF1F</h3><ul><li>\u5BF9\u7D22\u5F15\u4F7F\u7528\u5DE6\u6216\u8005\u5DE6\u53F3\u6A21\u7CCA\u5339\u914D\uFF0C\u4E5F\u5C31\u662F like %xx \u6216\u8005 like %xx% \u8FD9\u4E24\u79CD\u65B9\u5F0F\u90FD\u4F1A\u9020\u6210\u7D22\u5F15\u5931\u6548\u3002\u539F\u56E0\u5728\u4E8E\u67E5\u8BE2\u7684\u7ED3\u679C\u53EF\u80FD\u662F\u591A\u4E2A\uFF0C\u4E0D\u77E5\u9053\u4ECE\u54EA\u4E2A\u7D22\u5F15\u503C\u5F00\u59CB\u6BD4\u8F83\uFF0C\u4E8E\u662F\u5C31\u53EA\u80FD\u901A\u8FC7\u5168\u8868\u626B\u63CF\u7684\u65B9\u5F0F\u6765\u67E5\u8BE2\u3002</li><li>\u5BF9\u7D22\u5F15\u8FDB\u884C\u51FD\u6570/\u5BF9\u7D22\u5F15\u8FDB\u884C\u8868\u8FBE\u5F0F\u8BA1\u7B97\uFF0C\u56E0\u4E3A\u7D22\u5F15\u4FDD\u6301\u7684\u662F\u7D22\u5F15\u5B57\u6BB5\u7684\u539F\u59CB\u503C\uFF0C\u800C\u4E0D\u662F\u7ECF\u8FC7\u51FD\u6570\u8BA1\u7B97\u7684\u503C\uFF0C\u81EA\u7136\u5C31\u6CA1\u529E\u6CD5\u8D70\u7D22\u5F15\u3002</li><li>\u5BF9\u7D22\u5F15\u8FDB\u884C\u9690\u5F0F\u8F6C\u6362\u76F8\u5F53\u4E8E\u4F7F\u7528\u4E86\u65B0\u51FD\u6570\u3002</li><li>WHERE \u5B50\u53E5\u4E2D\u7684 OR\u8BED\u53E5\uFF0C\u53EA\u8981\u6709\u6761\u4EF6\u5217\u4E0D\u662F\u7D22\u5F15\u5217\uFF0C\u5C31\u4F1A\u8FDB\u884C\u5168\u8868\u626B\u63CF\u3002</li></ul><h3 id="_10\u3001\u5B57\u7B26\u4E32\u52A0\u7D22\u5F15" tabindex="-1"><a class="header-anchor" href="#_10\u3001\u5B57\u7B26\u4E32\u52A0\u7D22\u5F15" aria-hidden="true">#</a> 10\u3001\u5B57\u7B26\u4E32\u52A0\u7D22\u5F15</h3><ul><li>\u76F4\u63A5\u521B\u5EFA\u5B8C\u6574\u7D22\u5F15\uFF0C\u8FD9\u6837\u53EF\u80FD\u4F1A\u6BD4\u8F83\u5360\u7528\u7A7A\u95F4\u3002</li><li>\u521B\u5EFA\u524D\u7F00\u7D22\u5F15\uFF0C\u8282\u7701\u7A7A\u95F4\uFF0C\u4F46\u4F1A\u589E\u52A0\u67E5\u8BE2\u626B\u63CF\u6B21\u6570\uFF0C\u5E76\u4E14\u4E0D\u80FD\u4F7F\u7528\u8986\u76D6\u7D22\u5F15\u3002</li><li>\u5012\u5E8F\u5B58\u50A8\uFF0C\u518D\u521B\u5EFA\u524D\u7F00\u7D22\u5F15\uFF0C\u7528\u4E8E\u7ED5\u8FC7\u5B57\u7B26\u4E32\u672C\u8EAB\u524D\u7F00\u7684\u533A\u5206\u5EA6\u4E0D\u591F\u7684\u95EE\u9898\u3002</li><li>\u521B\u5EFA hash \u5B57\u6BB5\u7D22\u5F15\uFF0C\u67E5\u8BE2\u6027\u80FD\u7A33\u5B9A\uFF0C\u6709\u989D\u5916\u7684\u5B58\u50A8\u548C\u8BA1\u7B97\u6D88\u8017\uFF0C\u8DDF\u7B2C\u4E09\u79CD\u65B9\u5F0F\u4E00\u6837\uFF0C\u90FD\u4E0D\u652F\u6301\u8303\u56F4\u626B\u63CF\u3002</li></ul><h2 id="\u65E5\u5FD7\u76F8\u5173" tabindex="-1"><a class="header-anchor" href="#\u65E5\u5FD7\u76F8\u5173" aria-hidden="true">#</a> \u65E5\u5FD7\u76F8\u5173</h2><h3 id="_11\u3001mysql-\u7684-change-buffer-\u662F\u4EC0\u4E48" tabindex="-1"><a class="header-anchor" href="#_11\u3001mysql-\u7684-change-buffer-\u662F\u4EC0\u4E48" aria-hidden="true">#</a> 11\u3001MySQL \u7684 change buffer \u662F\u4EC0\u4E48\uFF1F</h3><ul><li>\u5F53\u9700\u8981\u66F4\u65B0\u4E00\u4E2A\u6570\u636E\u9875\u65F6\uFF0C\u5982\u679C\u6570\u636E\u9875\u5728\u5185\u5B58\u4E2D\u5C31\u76F4\u63A5\u66F4\u65B0\uFF1B\u800C\u5982\u679C\u8FD9\u4E2A\u6570\u636E\u9875\u8FD8\u6CA1\u6709\u5728\u5185\u5B58\u4E2D\u7684\u8BDD\uFF0C\u5728\u4E0D\u5F71\u54CD\u6570\u636E\u4E00\u81F4\u6027\u7684\u524D\u63D0\u4E0B\uFF0CInnoDB \u4F1A\u5C06\u8FD9\u4E9B\u66F4\u65B0\u64CD\u4F5C\u7F13\u5B58\u5728 change buffer \u4E2D\u3002</li><li>\u8FD9\u6837\u5C31\u4E0D\u9700\u8981\u4ECE\u78C1\u76D8\u4E2D\u8BFB\u5165\u8FD9\u4E2A\u6570\u636E\u9875\u4E86\uFF0C\u5728\u4E0B\u6B21\u67E5\u8BE2\u9700\u8981\u8BBF\u95EE\u8FD9\u4E2A\u6570\u636E\u9875\u7684\u65F6\u5019\uFF0C\u5C06\u6570\u636E\u9875\u8BFB\u5165\u5185\u5B58\uFF0C\u7136\u540E\u6267\u884C change buffer \u4E2D\u4E0E\u8FD9\u4E2A\u9875\u6709\u5173\u7684\u64CD\u4F5C\u3002\u901A\u8FC7\u8FD9\u79CD\u65B9\u5F0F\u5C31\u80FD\u4FDD\u8BC1\u8FD9\u4E2A\u6570\u636E\u903B\u8F91\u7684\u6B63\u786E\u6027\u3002</li><li>\u6CE8\u610F\u552F\u4E00\u7D22\u5F15\u7684\u66F4\u65B0\u5C31\u4E0D\u80FD\u4F7F\u7528 change buffer\uFF0C\u5B9E\u9645\u4E0A\u4E5F\u53EA\u6709\u666E\u901A\u7D22\u5F15\u53EF\u4EE5\u4F7F\u7528\u3002</li><li>\u9002\u7528\u573A\u666F\uFF1A</li><li><ul><li>\u5BF9\u4E8E\u5199\u591A\u8BFB\u5C11\u7684\u4E1A\u52A1\u6765\u8BF4\uFF0C\u9875\u9762\u5728\u5199\u5B8C\u4EE5\u540E\u9A6C\u4E0A\u88AB\u8BBF\u95EE\u5230\u7684\u6982\u7387\u6BD4\u8F83\u5C0F\uFF0C\u6B64\u65F6 change buffer \u7684\u4F7F\u7528\u6548\u679C\u6700\u597D\u3002\u8FD9\u79CD\u4E1A\u52A1\u6A21\u578B\u5E38\u89C1\u7684\u5C31\u662F\u8D26\u5355\u7C7B\u3001\u65E5\u5FD7\u7C7B\u7684\u7CFB\u7EDF\u3002</li><li>\u53CD\u8FC7\u6765\uFF0C\u5047\u8BBE\u4E00\u4E2A\u4E1A\u52A1\u7684\u66F4\u65B0\u6A21\u5F0F\u662F\u5199\u5165\u4E4B\u540E\u9A6C\u4E0A\u4F1A\u505A\u67E5\u8BE2\uFF0C\u90A3\u4E48\u5373\u4F7F\u6EE1\u8DB3\u4E86\u6761\u4EF6\uFF0C\u5C06\u66F4\u65B0\u5148\u8BB0\u5F55\u5728 change buffer\uFF0C\u4F46\u4E4B\u540E\u7531\u4E8E\u9A6C\u4E0A\u8981\u8BBF\u95EE\u8FD9\u4E2A\u6570\u636E\u9875\uFF0C\u4F1A\u7ACB\u5373\u89E6\u53D1 merge \u8FC7\u7A0B\u3002\u8FD9\u6837\u968F\u673A\u8BBF\u95EE IO \u7684\u6B21\u6570\u4E0D\u4F1A\u51CF\u5C11\uFF0C\u53CD\u800C\u589E\u52A0\u4E86 change buffer \u7684\u7EF4\u62A4\u4EE3\u4EF7\u3002</li></ul></li></ul><h3 id="_12\u3001mysql-\u662F\u5982\u4F55\u5224\u65AD\u4E00\u884C\u626B\u63CF\u6570\u7684" tabindex="-1"><a class="header-anchor" href="#_12\u3001mysql-\u662F\u5982\u4F55\u5224\u65AD\u4E00\u884C\u626B\u63CF\u6570\u7684" aria-hidden="true">#</a> 12\u3001MySQL \u662F\u5982\u4F55\u5224\u65AD\u4E00\u884C\u626B\u63CF\u6570\u7684\uFF1F</h3><ul><li>MySQL \u5728\u771F\u6B63\u5F00\u59CB\u6267\u884C\u8BED\u53E5\u4E4B\u524D\uFF0C\u5E76\u4E0D\u80FD\u7CBE\u786E\u5730\u77E5\u9053\u6EE1\u8DB3\u8FD9\u4E2A\u6761\u4EF6\u7684\u8BB0\u5F55\u6709\u591A\u5C11\u6761\u3002</li><li>\u800C\u53EA\u80FD\u6839\u636E\u7EDF\u8BA1\u4FE1\u606F\u6765\u4F30\u7B97\u8BB0\u5F55\u6570\u3002\u8FD9\u4E2A\u7EDF\u8BA1\u4FE1\u606F\u5C31\u662F\u7D22\u5F15\u7684\u201C\u533A\u5206\u5EA6\u3002</li></ul><h3 id="_13\u3001mysql-\u7684-redo-log-\u548C-binlog-\u533A\u522B" tabindex="-1"><a class="header-anchor" href="#_13\u3001mysql-\u7684-redo-log-\u548C-binlog-\u533A\u522B" aria-hidden="true">#</a> 13\u3001MySQL \u7684 redo log \u548C binlog \u533A\u522B\uFF1F</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/herongwei/mysql-a2b8e123-41cb-4717-9225-3a8b49197004.png" alt=""></p><h3 id="_14\u3001\u4E3A\u4EC0\u4E48\u9700\u8981-redo-log" tabindex="-1"><a class="header-anchor" href="#_14\u3001\u4E3A\u4EC0\u4E48\u9700\u8981-redo-log" aria-hidden="true">#</a> 14\u3001\u4E3A\u4EC0\u4E48\u9700\u8981 redo log\uFF1F</h3><ul><li>redo log \u4E3B\u8981\u7528\u4E8E MySQL \u5F02\u5E38\u91CD\u542F\u540E\u7684\u4E00\u79CD\u6570\u636E\u6062\u590D\u624B\u6BB5\uFF0C\u786E\u4FDD\u4E86\u6570\u636E\u7684\u4E00\u81F4\u6027\u3002</li><li>\u5176\u5B9E\u662F\u4E3A\u4E86\u914D\u5408 MySQL \u7684 WAL \u673A\u5236\u3002\u56E0\u4E3A MySQL \u8FDB\u884C\u66F4\u65B0\u64CD\u4F5C\uFF0C\u4E3A\u4E86\u80FD\u591F\u5FEB\u901F\u54CD\u5E94\uFF0C\u6240\u4EE5\u91C7\u7528\u4E86\u5F02\u6B65\u5199\u56DE\u78C1\u76D8\u7684\u6280\u672F\uFF0C\u5199\u5165\u5185\u5B58\u540E\u5C31\u8FD4\u56DE\u3002\u4F46\u662F\u8FD9\u6837\uFF0C\u4F1A\u5B58\u5728 <strong>crash\u540E</strong> \u5185\u5B58\u6570\u636E\u4E22\u5931\u7684\u9690\u60A3\uFF0C\u800C redo log \u5177\u5907 crash safe \u7684\u80FD\u529B\u3002</li></ul><h3 id="_15\u3001\u4E3A\u4EC0\u4E48-redo-log-\u5177\u6709-crash-safe-\u7684\u80FD\u529B-\u662F-binlog-\u65E0\u6CD5\u66FF\u4EE3\u7684" tabindex="-1"><a class="header-anchor" href="#_15\u3001\u4E3A\u4EC0\u4E48-redo-log-\u5177\u6709-crash-safe-\u7684\u80FD\u529B-\u662F-binlog-\u65E0\u6CD5\u66FF\u4EE3\u7684" aria-hidden="true">#</a> 15\u3001\u4E3A\u4EC0\u4E48 redo log \u5177\u6709 crash-safe \u7684\u80FD\u529B\uFF0C\u662F binlog \u65E0\u6CD5\u66FF\u4EE3\u7684\uFF1F</h3><p>\u7B2C\u4E00\u70B9\uFF1Aredo log \u53EF\u786E\u4FDD innoDB \u5224\u65AD\u54EA\u4E9B\u6570\u636E\u5DF2\u7ECF\u5237\u76D8\uFF0C\u54EA\u4E9B\u6570\u636E\u8FD8\u6CA1\u6709</p><ul><li><p>redo log \u548C binlog \u6709\u4E00\u4E2A\u5F88\u5927\u7684\u533A\u522B\u5C31\u662F\uFF0C\u4E00\u4E2A\u662F\u5FAA\u73AF\u5199\uFF0C\u4E00\u4E2A\u662F\u8FFD\u52A0\u5199\u3002\u4E5F\u5C31\u662F\u8BF4 redo log \u53EA\u4F1A\u8BB0\u5F55\u672A\u5237\u76D8\u7684\u65E5\u5FD7\uFF0C\u5DF2\u7ECF\u5237\u5165\u78C1\u76D8\u7684\u6570\u636E\u90FD\u4F1A\u4ECE redo log \u8FD9\u4E2A\u6709\u9650\u5927\u5C0F\u7684\u65E5\u5FD7\u6587\u4EF6\u91CC\u5220\u9664\u3002binlog \u662F\u8FFD\u52A0\u65E5\u5FD7\uFF0C\u4FDD\u5B58\u7684\u662F\u5168\u91CF\u7684\u65E5\u5FD7\u3002</p></li><li><p>\u5F53\u6570\u636E\u5E93 crash \u540E\uFF0C\u60F3\u8981\u6062\u590D<strong>\u672A\u5237\u76D8\u4F46\u5DF2\u7ECF\u5199\u5165 redo log \u548C binlog \u7684\u6570\u636E</strong>\u5230\u5185\u5B58\u65F6\uFF0Cbinlog \u662F\u65E0\u6CD5\u6062\u590D\u7684\u3002\u867D\u7136 binlog \u62E5\u6709\u5168\u91CF\u7684\u65E5\u5FD7\uFF0C\u4F46\u6CA1\u6709\u4E00\u4E2A\u6807\u5FD7\u8BA9 innoDB \u5224\u65AD\u54EA\u4E9B\u6570\u636E\u5DF2\u7ECF\u5237\u76D8\uFF0C\u54EA\u4E9B\u6570\u636E\u8FD8\u6CA1\u6709\u3002</p></li><li><p>\u4F46 redo log \u4E0D\u4E00\u6837\uFF0C\u53EA\u8981\u5237\u5165\u78C1\u76D8\u7684\u6570\u636E\uFF0C\u90FD\u4F1A\u4ECE redo log \u4E2D\u62B9\u6389\uFF0C\u56E0\u4E3A\u662F\u5FAA\u73AF\u5199\uFF01\u6570\u636E\u5E93\u91CD\u542F\u540E\uFF0C\u76F4\u63A5\u628A redo log \u4E2D\u7684\u6570\u636E\u90FD\u6062\u590D\u81F3\u5185\u5B58\u5C31\u53EF\u4EE5\u4E86\u3002</p></li></ul><p>\u7B2C\u4E8C\u70B9\uFF1A\u5982\u679C redo log \u5199\u5165\u5931\u8D25\uFF0C\u8BF4\u660E\u6B64\u6B21\u64CD\u4F5C\u5931\u8D25\uFF0C\u4E8B\u52A1\u4E5F\u4E0D\u53EF\u80FD\u63D0\u4EA4</p><ul><li>redo log \u6BCF\u6B21\u66F4\u65B0\u64CD\u4F5C\u5B8C\u6210\u540E\uFF0C\u5C31\u4E00\u5B9A\u4F1A\u5199\u5165\u65E5\u5FD7\uFF0C\u5982\u679C<strong>\u5199\u5165\u5931\u8D25</strong>\uFF0C\u8BF4\u660E\u6B64\u6B21\u64CD\u4F5C\u5931\u8D25\uFF0C\u4E8B\u52A1\u4E5F\u4E0D\u53EF\u80FD\u63D0\u4EA4\u3002</li><li>redo log \u5185\u90E8\u7ED3\u6784\u662F\u57FA\u4E8E\u9875\u7684\uFF0C\u8BB0\u5F55\u4E86\u8FD9\u4E2A\u9875\u7684\u5B57\u6BB5\u503C\u53D8\u5316\uFF0C\u53EA\u8981crash\u540E\u8BFB\u53D6redo log\u8FDB\u884C\u91CD\u653E\uFF0C\u5C31\u53EF\u4EE5\u6062\u590D\u6570\u636E\u3002</li><li>\u8FD9\u5C31\u662F\u4E3A\u4EC0\u4E48 redo log \u5177\u6709 crash-safe \u7684\u80FD\u529B\uFF0C\u800C binlog \u4E0D\u5177\u5907\u3002</li></ul><h3 id="_16\u3001\u5F53\u6570\u636E\u5E93-crash-\u540E-\u5982\u4F55\u6062\u590D\u672A\u5237\u76D8\u7684\u6570\u636E\u5230\u5185\u5B58\u4E2D" tabindex="-1"><a class="header-anchor" href="#_16\u3001\u5F53\u6570\u636E\u5E93-crash-\u540E-\u5982\u4F55\u6062\u590D\u672A\u5237\u76D8\u7684\u6570\u636E\u5230\u5185\u5B58\u4E2D" aria-hidden="true">#</a> 16\u3001\u5F53\u6570\u636E\u5E93 crash \u540E\uFF0C\u5982\u4F55\u6062\u590D\u672A\u5237\u76D8\u7684\u6570\u636E\u5230\u5185\u5B58\u4E2D\uFF1F</h3><p>\u6839\u636E redo log \u548C binlog \u7684\u4E24\u9636\u6BB5\u63D0\u4EA4\uFF0C\u672A\u6301\u4E45\u5316\u7684\u6570\u636E\u5206\u4E3A\u51E0\u79CD\u60C5\u51B5\uFF1A</p><ul><li><p>change buffer \u5199\u5165\uFF0Credo log \u867D\u7136\u505A\u4E86 fsync \u4F46\u672A commit\uFF0Cbinlog \u672A fsync \u5230\u78C1\u76D8\uFF0C\u8FD9\u90E8\u5206\u6570\u636E\u4E22\u5931\u3002</p></li><li><p>change buffer \u5199\u5165\uFF0Credo log fsync \u672A commit\uFF0Cbinlog \u5DF2\u7ECF fsync \u5230\u78C1\u76D8\uFF0C\u5148\u4ECE binlog \u6062\u590D redo log\uFF0C\u518D\u4ECE redo log \u6062\u590D change buffer\u3002</p></li><li><p>change buffer \u5199\u5165\uFF0Credo log \u548C binlog \u90FD\u5DF2\u7ECF fsync\uFF0C\u76F4\u63A5\u4ECE redo log \u91CC\u6062\u590D\u3002</p></li></ul><h3 id="_17\u3001redo-log-\u5199\u5165\u65B9\u5F0F" tabindex="-1"><a class="header-anchor" href="#_17\u3001redo-log-\u5199\u5165\u65B9\u5F0F" aria-hidden="true">#</a> 17\u3001redo log \u5199\u5165\u65B9\u5F0F\uFF1F</h3><p>redo log\u5305\u62EC\u4E24\u90E8\u5206\u5185\u5BB9\uFF0C\u5206\u522B\u662F\u5185\u5B58\u4E2D\u7684<strong>\u65E5\u5FD7\u7F13\u51B2</strong>(redo log buffer)\u548C\u78C1\u76D8\u4E0A\u7684<strong>\u65E5\u5FD7\u6587\u4EF6</strong>(redo log file)\u3002</p><p>MySQL \u6BCF\u6267\u884C\u4E00\u6761 DML \u8BED\u53E5\uFF0C\u4F1A\u5148\u628A\u8BB0\u5F55\u5199\u5165 <strong>redo log buffer\uFF08\u7528\u6237\u7A7A\u95F4\uFF09</strong> \uFF0C\u518D\u4FDD\u5B58\u5230\u5185\u6838\u7A7A\u95F4\u7684\u7F13\u51B2\u533A OS-buffer \u4E2D\uFF0C\u540E\u7EED\u67D0\u4E2A\u65F6\u95F4\u70B9\u518D\u4E00\u6B21\u6027\u5C06\u591A\u4E2A\u64CD\u4F5C\u8BB0\u5F55\u5199\u5230 <strong>redo log file\uFF08\u5237\u76D8\uFF09</strong> \u3002\u8FD9\u79CD\u5148\u5199\u65E5\u5FD7\uFF0C\u518D\u5199\u78C1\u76D8\u7684\u6280\u672F\uFF0C\u5C31\u662F<strong>WAL</strong>\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/herongwei/mysql-f901a97f-9d82-4d4e-a5be-559a64b3d9b8.png" alt=""></p><p>\u53EF\u4EE5\u53D1\u73B0\uFF0Credo log buffer\u5199\u5165\u5230redo log file\uFF0C\u662F\u7ECF\u8FC7OS buffer\u4E2D\u8F6C\u7684\u3002\u5176\u5B9E\u53EF\u4EE5\u901A\u8FC7\u53C2\u6570innodb_flush_log_at_trx_commit\u8FDB\u884C\u914D\u7F6E\uFF0C\u53C2\u6570\u503C\u542B\u4E49\u5982\u4E0B\uFF1A</p><ul><li>0\uFF1A\u79F0\u4E3A<strong>\u5EF6\u8FDF\u5199</strong>\uFF0C\u4E8B\u52A1\u63D0\u4EA4\u65F6\u4E0D\u4F1A\u5C06redo log buffer\u4E2D\u65E5\u5FD7\u5199\u5165\u5230OS buffer\uFF0C\u800C\u662F\u6BCF\u79D2\u5199\u5165OS buffer\u5E76\u8C03\u7528\u5199\u5165\u5230redo log file\u4E2D\u3002</li><li>1\uFF1A\u79F0\u4E3A<strong>\u5B9E\u65F6\u5199</strong>\uFF0C\u5B9E\u65F6\u5237\u201D\uFF0C\u4E8B\u52A1\u6BCF\u6B21\u63D0\u4EA4\u90FD\u4F1A\u5C06redo log buffer\u4E2D\u7684\u65E5\u5FD7\u5199\u5165OS buffer\u5E76\u4FDD\u5B58\u5230redo log file\u4E2D\u3002</li><li>2\uFF1A \u79F0\u4E3A<strong>\u5B9E\u65F6\u5199\uFF0C\u5EF6\u8FDF\u5237</strong>\u3002\u6BCF\u6B21\u4E8B\u52A1\u63D0\u4EA4\u5199\u5165\u5230OS buffer\uFF0C\u7136\u540E\u662F\u6BCF\u79D2\u5C06\u65E5\u5FD7\u5199\u5165\u5230redo log file\u3002</li></ul><h3 id="_18\u3001redo-log-\u7684\u6267\u884C\u6D41\u7A0B" tabindex="-1"><a class="header-anchor" href="#_18\u3001redo-log-\u7684\u6267\u884C\u6D41\u7A0B" aria-hidden="true">#</a> 18\u3001redo log \u7684\u6267\u884C\u6D41\u7A0B?</h3><p>\u6211\u4EEC\u6765\u770B\u4E0BRedo log\u7684\u6267\u884C\u6D41\u7A0B\uFF0C\u5047\u8BBE\u6267\u884C\u7684 SQL \u5982\u4E0B\uFF1A</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>update T set a =1 where id =666
+import{_ as a}from"./plugin-vue_export-helper.21dcd24c.js";import{r as n,o,c as d,a as i,b as r,d as l,e as h}from"./app.615e41d8.js";const t={},s=i("h1",{id:"\u7CBE\u9009\u6570\u636E\u5E9360\u9053\u9762\u8BD5\u9898\u5FC5\u770B",tabindex:"-1"},[i("a",{class:"header-anchor",href:"#\u7CBE\u9009\u6570\u636E\u5E9360\u9053\u9762\u8BD5\u9898\u5FC5\u770B","aria-hidden":"true"},"#"),l(" \u7CBE\u9009\u6570\u636E\u5E9360\u9053\u9762\u8BD5\u9898\u5FC5\u770B\u{1F44D}")],-1),c=l("\u56FE\u6587\u8BE6\u89E3 60 \u9053 MySQL \u9762\u8BD5\u9AD8\u9891\u9898\uFF0C\u8FD9\u6B21\u540A\u6253\u9762\u8BD5\u5B98\uFF0C\u6211\u89C9\u5F97\u7A33\u4E86\uFF08\u624B\u52A8 dog\uFF09\u3002\u6574\u7406\uFF1A\u6C89\u9ED8\u738B\u4E8C\uFF0C\u6233"),u={href:"https://mp.weixin.qq.com/s/c-sy7tM0BmrqMUQFW7C65g",target:"_blank",rel:"noopener noreferrer"},g=l("\u8F6C\u8F7D\u94FE\u63A5"),p=l("\uFF0C\u91CC\u9762\u6709\u5C40\u8BE6\u7EC6\u7684\u601D\u7EF4\u5BFC\u56FE\uFF1B\u4F5C\u8005\uFF1Aherongwei\uFF0C\u6233"),b={href:"https://mp.weixin.qq.com/s/-SqqKmhZcOlQxM-rHiIpKg",target:"_blank",rel:"noopener noreferrer"},_=l("\u539F\u6587\u94FE\u63A5"),f=l("\u3002"),m=h(`<h2 id="\u57FA\u7840" tabindex="-1"><a class="header-anchor" href="#\u57FA\u7840" aria-hidden="true">#</a> \u57FA\u7840</h2><h3 id="_1\u3001\u5173\u7CFB\u578B\u548C\u975E\u5173\u7CFB\u578B\u6570\u636E\u5E93\u7684\u533A\u522B" tabindex="-1"><a class="header-anchor" href="#_1\u3001\u5173\u7CFB\u578B\u548C\u975E\u5173\u7CFB\u578B\u6570\u636E\u5E93\u7684\u533A\u522B" aria-hidden="true">#</a> 1\u3001\u5173\u7CFB\u578B\u548C\u975E\u5173\u7CFB\u578B\u6570\u636E\u5E93\u7684\u533A\u522B\uFF1F</h3><p>\u5173\u7CFB\u578B\u6570\u636E\u5E93\u7684\u4F18\u70B9</p><ul><li>\u5BB9\u6613\u7406\u89E3\uFF0C\u56E0\u4E3A\u5B83\u91C7\u7528\u4E86\u5173\u7CFB\u6A21\u578B\u6765\u7EC4\u7EC7\u6570\u636E\u3002</li><li>\u53EF\u4EE5\u4FDD\u6301\u6570\u636E\u7684\u4E00\u81F4\u6027\u3002</li><li>\u6570\u636E\u66F4\u65B0\u7684\u5F00\u9500\u6BD4\u8F83\u5C0F\u3002</li><li>\u652F\u6301\u590D\u6742\u67E5\u8BE2\uFF08\u5E26 where \u5B50\u53E5\u7684\u67E5\u8BE2\uFF09</li></ul><p>\u975E\u5173\u7CFB\u578B\u6570\u636E\u5E93\uFF08NOSQL\uFF09\u7684\u4F18\u70B9</p><ul><li>\u65E0\u9700\u7ECF\u8FC7 SQL \u5C42\u7684\u89E3\u6790\uFF0C\u8BFB\u5199\u6548\u7387\u9AD8\u3002</li><li>\u57FA\u4E8E\u952E\u503C\u5BF9\uFF0C\u8BFB\u5199\u6027\u80FD\u5F88\u9AD8\uFF0C\u6613\u4E8E\u6269\u5C55</li><li>\u53EF\u4EE5\u652F\u6301\u591A\u79CD\u7C7B\u578B\u6570\u636E\u7684\u5B58\u50A8\uFF0C\u5982\u56FE\u7247\uFF0C\u6587\u6863\u7B49\u7B49\u3002</li><li>\u6269\u5C55\uFF08\u53EF\u5206\u4E3A\u5185\u5B58\u6027\u6570\u636E\u5E93\u4EE5\u53CA\u6587\u6863\u578B\u6570\u636E\u5E93\uFF0C\u6BD4\u5982 Redis\uFF0CMongoDB\uFF0CHBase \u7B49\uFF0C\u9002\u5408\u573A\u666F\uFF1A\u6570\u636E\u91CF\u5927\u9AD8\u53EF\u7528\u7684\u65E5\u5FD7\u7CFB\u7EDF/\u5730\u7406\u4F4D\u7F6E\u5B58\u50A8\u7CFB\u7EDF\uFF09\u3002</li></ul><h3 id="_2\u3001\u8BE6\u7EC6\u8BF4\u4E00\u4E0B\u4E00\u6761-mysql-\u8BED\u53E5\u6267\u884C\u7684\u6B65\u9AA4" tabindex="-1"><a class="header-anchor" href="#_2\u3001\u8BE6\u7EC6\u8BF4\u4E00\u4E0B\u4E00\u6761-mysql-\u8BED\u53E5\u6267\u884C\u7684\u6B65\u9AA4" aria-hidden="true">#</a> 2\u3001\u8BE6\u7EC6\u8BF4\u4E00\u4E0B\u4E00\u6761 MySQL \u8BED\u53E5\u6267\u884C\u7684\u6B65\u9AA4</h3><p>Server \u5C42\u6309\u987A\u5E8F\u6267\u884C SQL \u7684\u6B65\u9AA4\u4E3A\uFF1A</p><ul><li>\u5BA2\u6237\u7AEF\u8BF7\u6C42 -&gt; \u8FDE\u63A5\u5668\uFF08\u9A8C\u8BC1\u7528\u6237\u8EAB\u4EFD\uFF0C\u7ED9\u4E88\u6743\u9650\uFF09</li><li>\u67E5\u8BE2\u7F13\u5B58\uFF08\u5B58\u5728\u7F13\u5B58\u5219\u76F4\u63A5\u8FD4\u56DE\uFF0C\u4E0D\u5B58\u5728\u5219\u6267\u884C\u540E\u7EED\u64CD\u4F5C\uFF09</li><li>\u5206\u6790\u5668\uFF08\u5BF9 SQL \u8FDB\u884C\u8BCD\u6CD5\u5206\u6790\u548C\u8BED\u6CD5\u5206\u6790\u64CD\u4F5C\uFF09</li><li>\u4F18\u5316\u5668\uFF08\u4E3B\u8981\u5BF9\u6267\u884C\u7684 SQL \u4F18\u5316\u9009\u62E9\u6700\u4F18\u7684\u6267\u884C\u65B9\u6848\u65B9\u6CD5\uFF09</li><li>\u6267\u884C\u5668\uFF08\u6267\u884C\u65F6\u4F1A\u5148\u770B\u7528\u6237\u662F\u5426\u6709\u6267\u884C\u6743\u9650\uFF0C\u6709\u624D\u53BB\u4F7F\u7528\u8FD9\u4E2A\u5F15\u64CE\u63D0\u4F9B\u7684\u63A5\u53E3\uFF09-&gt; \u53BB\u5F15\u64CE\u5C42\u83B7\u53D6\u6570\u636E\u8FD4\u56DE\uFF08\u5982\u679C\u5F00\u542F\u67E5\u8BE2\u7F13\u5B58\u5219\u4F1A\u7F13\u5B58\u67E5\u8BE2\u7ED3\u679C\uFF09</li></ul><h2 id="\u7D22\u5F15\u76F8\u5173" tabindex="-1"><a class="header-anchor" href="#\u7D22\u5F15\u76F8\u5173" aria-hidden="true">#</a> \u7D22\u5F15\u76F8\u5173</h2><h3 id="_3\u3001mysql-\u4F7F\u7528\u7D22\u5F15\u7684\u539F\u56E0" tabindex="-1"><a class="header-anchor" href="#_3\u3001mysql-\u4F7F\u7528\u7D22\u5F15\u7684\u539F\u56E0" aria-hidden="true">#</a> 3\u3001MySQL \u4F7F\u7528\u7D22\u5F15\u7684\u539F\u56E0\uFF1F</h3><p>\u6839\u672C\u539F\u56E0</p><ul><li>\u7D22\u5F15\u7684\u51FA\u73B0\uFF0C\u5C31\u662F\u4E3A\u4E86\u63D0\u9AD8\u6570\u636E\u67E5\u8BE2\u7684\u6548\u7387\uFF0C\u5C31\u50CF\u4E66\u7684\u76EE\u5F55\u4E00\u6837\u3002</li><li>\u5BF9\u4E8E\u6570\u636E\u5E93\u7684\u8868\u800C\u8A00\uFF0C\u7D22\u5F15\u5176\u5B9E\u5C31\u662F\u5B83\u7684\u201C\u76EE\u5F55\u201D\u3002</li></ul><p>\u6269\u5C55</p><ul><li>\u521B\u5EFA\u552F\u4E00\u6027\u7D22\u5F15\uFF0C\u53EF\u4EE5\u4FDD\u8BC1\u6570\u636E\u5E93\u8868\u4E2D\u6BCF\u4E00\u884C\u6570\u636E\u7684\u552F\u4E00\u6027\u3002</li><li>\u5E2E\u52A9\u5F15\u64CE\u5C42\u907F\u514D\u6392\u5E8F\u548C\u4E34\u65F6\u8868</li><li>\u5C06\u968F\u673A IO \u53D8\u4E3A\u987A\u5E8F IO\uFF0C\u52A0\u901F\u8868\u548C\u8868\u4E4B\u95F4\u7684\u8FDE\u63A5\u3002</li></ul><h3 id="_4\u3001\u7D22\u5F15\u7684\u4E09\u79CD\u5E38\u89C1\u5E95\u5C42\u6570\u636E\u7ED3\u6784\u4EE5\u53CA\u4F18\u7F3A\u70B9" tabindex="-1"><a class="header-anchor" href="#_4\u3001\u7D22\u5F15\u7684\u4E09\u79CD\u5E38\u89C1\u5E95\u5C42\u6570\u636E\u7ED3\u6784\u4EE5\u53CA\u4F18\u7F3A\u70B9" aria-hidden="true">#</a> 4\u3001\u7D22\u5F15\u7684\u4E09\u79CD\u5E38\u89C1\u5E95\u5C42\u6570\u636E\u7ED3\u6784\u4EE5\u53CA\u4F18\u7F3A\u70B9</h3><p>\u4E09\u79CD\u5E38\u89C1\u7684\u7D22\u5F15\u5E95\u5C42\u6570\u636E\u7ED3\u6784\uFF1A\u5206\u522B\u662F\u54C8\u5E0C\u8868\u3001\u6709\u5E8F\u6570\u7EC4\u548C\u641C\u7D22\u6811\u3002</p><ul><li>\u54C8\u5E0C\u8868\u8FD9\u79CD\u9002\u7528\u4E8E\u7B49\u503C\u67E5\u8BE2\u7684\u573A\u666F\uFF0C\u6BD4\u5982 memcached \u4EE5\u53CA\u5176\u5B83\u4E00\u4E9B NoSQL \u5F15\u64CE\uFF0C\u4E0D\u9002\u5408\u8303\u56F4\u67E5\u8BE2\u3002</li><li>\u6709\u5E8F\u6570\u7EC4\u7D22\u5F15\u53EA\u9002\u7528\u4E8E\u9759\u6001\u5B58\u50A8\u5F15\u64CE\uFF0C\u7B49\u503C\u548C\u8303\u56F4\u67E5\u8BE2\u6027\u80FD\u597D\uFF0C\u4F46\u66F4\u65B0\u6570\u636E\u6210\u672C\u9AD8\u3002</li><li>N \u53C9\u6811\u7531\u4E8E\u8BFB\u5199\u4E0A\u7684\u6027\u80FD\u4F18\u70B9\u4EE5\u53CA\u9002\u914D\u78C1\u76D8\u8BBF\u95EE\u6A21\u5F0F\u4EE5\u53CA\u5E7F\u6CDB\u5E94\u7528\u5728\u6570\u636E\u5E93\u5F15\u64CE\u4E2D\u3002</li><li>\u6269\u5C55\uFF08\u4EE5 InnoDB \u7684\u4E00\u4E2A\u6574\u6570\u5B57\u6BB5\u7D22\u5F15\u4E3A\u4F8B\uFF0C\u8FD9\u4E2A N \u5DEE\u4E0D\u591A\u662F 1200\u3002\u68F5\u6811\u9AD8\u662F 4 \u7684\u65F6\u5019\uFF0C\u5C31\u53EF\u4EE5\u5B58 1200 \u7684 3 \u6B21\u65B9\u4E2A\u503C\uFF0C\u8FD9\u5DF2\u7ECF 17 \u4EBF\u4E86\u3002\u8003\u8651\u5230\u6811\u6839\u7684\u6570\u636E\u5757\u603B\u662F\u5728\u5185\u5B58\u4E2D\u7684\uFF0C\u4E00\u4E2A 10 \u4EBF\u884C\u7684\u8868\u4E0A\u4E00\u4E2A\u6574\u6570\u5B57\u6BB5\u7684\u7D22\u5F15\uFF0C\u67E5\u627E\u4E00\u4E2A\u503C\u6700\u591A\u53EA\u9700\u8981\u8BBF\u95EE 3 \u6B21\u78C1\u76D8\u3002\u5176\u5B9E\uFF0C\u6811\u7684\u7B2C\u4E8C\u5C42\u4E5F\u6709\u5F88\u5927\u6982\u7387\u5728\u5185\u5B58\u4E2D\uFF0C\u90A3\u4E48\u8BBF\u95EE\u78C1\u76D8\u7684\u5E73\u5747\u6B21\u6570\u5C31\u66F4\u5C11\u4E86\u3002\uFF09</li></ul><h3 id="_5\u3001\u7D22\u5F15\u7684\u5E38\u89C1\u7C7B\u578B\u4EE5\u53CA\u5B83\u662F\u5982\u4F55\u53D1\u6325\u4F5C\u7528\u7684" tabindex="-1"><a class="header-anchor" href="#_5\u3001\u7D22\u5F15\u7684\u5E38\u89C1\u7C7B\u578B\u4EE5\u53CA\u5B83\u662F\u5982\u4F55\u53D1\u6325\u4F5C\u7528\u7684" aria-hidden="true">#</a> 5\u3001\u7D22\u5F15\u7684\u5E38\u89C1\u7C7B\u578B\u4EE5\u53CA\u5B83\u662F\u5982\u4F55\u53D1\u6325\u4F5C\u7528\u7684\uFF1F</h3><p>\u6839\u636E\u53F6\u5B50\u8282\u70B9\u7684\u5185\u5BB9\uFF0C\u7D22\u5F15\u7C7B\u578B\u5206\u4E3A\u4E3B\u952E\u7D22\u5F15\u548C\u975E\u4E3B\u952E\u7D22\u5F15\u3002</p><ul><li>\u4E3B\u952E\u7D22\u5F15\u7684\u53F6\u5B50\u8282\u70B9\u5B58\u7684\u6574\u884C\u6570\u636E\uFF0C\u5728InnoDB\u91CC\u4E5F\u88AB\u79F0\u4E3A\u805A\u7C07\u7D22\u5F15\u3002</li><li>\u975E\u4E3B\u952E\u7D22\u5F15\u53F6\u5B50\u8282\u70B9\u5B58\u7684\u4E3B\u952E\u7684\u503C\uFF0C\u5728InnoDB\u91CC\u4E5F\u88AB\u79F0\u4E3A\u4E8C\u7EA7\u7D22\u5F15\u3002</li></ul><h3 id="_6\u3001myisam-\u548C-innodb-\u5B9E\u73B0-b-\u6811\u7D22\u5F15\u65B9\u5F0F\u7684\u533A\u522B\u662F\u4EC0\u4E48" tabindex="-1"><a class="header-anchor" href="#_6\u3001myisam-\u548C-innodb-\u5B9E\u73B0-b-\u6811\u7D22\u5F15\u65B9\u5F0F\u7684\u533A\u522B\u662F\u4EC0\u4E48" aria-hidden="true">#</a> 6\u3001MyISAM \u548C InnoDB \u5B9E\u73B0 B \u6811\u7D22\u5F15\u65B9\u5F0F\u7684\u533A\u522B\u662F\u4EC0\u4E48\uFF1F</h3><ul><li>InnoDB \u5B58\u50A8\u5F15\u64CE\uFF1AB+ \u6811\u7D22\u5F15\u7684\u53F6\u5B50\u8282\u70B9\u4FDD\u5B58\u6570\u636E\u672C\u8EAB\uFF0C\u5176\u6570\u636E\u6587\u4EF6\u672C\u8EAB\u5C31\u662F\u7D22\u5F15\u6587\u4EF6\u3002</li><li>MyISAM \u5B58\u50A8\u5F15\u64CE\uFF1AB+ \u6811\u7D22\u5F15\u7684\u53F6\u5B50\u8282\u70B9\u4FDD\u5B58\u6570\u636E\u7684\u7269\u7406\u5730\u5740\uFF0C\u53F6\u8282\u70B9\u7684 data \u57DF\u5B58\u653E\u7684\u662F\u6570\u636E\u8BB0\u5F55\u7684\u5730\u5740\uFF0C\u7D22\u5F15\u6587\u4EF6\u548C\u6570\u636E\u6587\u4EF6\u662F\u5206\u79BB\u7684\u3002</li></ul><h3 id="_7\u3001innodb-\u4E3A\u4EC0\u4E48\u8BBE\u8BA1-b-\u6811\u7D22\u5F15" tabindex="-1"><a class="header-anchor" href="#_7\u3001innodb-\u4E3A\u4EC0\u4E48\u8BBE\u8BA1-b-\u6811\u7D22\u5F15" aria-hidden="true">#</a> 7\u3001InnoDB \u4E3A\u4EC0\u4E48\u8BBE\u8BA1 B+ \u6811\u7D22\u5F15\uFF1F</h3><p>\u4E24\u4E2A\u8003\u8651\u56E0\u7D20\uFF1A</p><ul><li>InnoDB \u9700\u8981\u6267\u884C\u7684\u573A\u666F\u548C\u529F\u80FD\u9700\u8981\u5728\u7279\u5B9A\u67E5\u8BE2\u4E0A\u62E5\u6709\u8F83\u5F3A\u7684\u6027\u80FD\u3002</li><li>CPU \u5C06\u78C1\u76D8\u4E0A\u7684\u6570\u636E\u52A0\u8F7D\u5230\u5185\u5B58\u4E2D\u9700\u8981\u82B1\u8D39\u5927\u91CF\u65F6\u95F4\u3002</li></ul><p>\u4E3A\u4EC0\u4E48\u9009\u62E9 B+ \u6811\uFF1A</p><ul><li><p>\u54C8\u5E0C\u7D22\u5F15\u867D\u7136\u80FD\u63D0\u4F9BO\uFF081\uFF09\u590D\u6742\u5EA6\u67E5\u8BE2\uFF0C\u4F46\u5BF9\u8303\u56F4\u67E5\u8BE2\u548C\u6392\u5E8F\u5374\u65E0\u6CD5\u5F88\u597D\u7684\u652F\u6301\uFF0C\u6700\u7EC8\u4F1A\u5BFC\u81F4\u5168\u8868\u626B\u63CF\u3002</p></li><li><p>B \u6811\u80FD\u591F\u5728\u975E\u53F6\u5B50\u8282\u70B9\u5B58\u50A8\u6570\u636E\uFF0C\u4F46\u4F1A\u5BFC\u81F4\u5728\u67E5\u8BE2\u8FDE\u7EED\u6570\u636E\u53EF\u80FD\u5E26\u6765\u66F4\u591A\u7684\u968F\u673A IO\u3002</p></li><li><p>\u800C B+ \u6811\u7684\u6240\u6709\u53F6\u8282\u70B9\u53EF\u4EE5\u901A\u8FC7\u6307\u9488\u6765\u76F8\u4E92\u8FDE\u63A5\uFF0C\u51CF\u5C11\u987A\u5E8F\u904D\u5386\u5E26\u6765\u7684\u968F\u673A IO\u3002</p></li><li><p>\u666E\u901A\u7D22\u5F15\u8FD8\u662F\u552F\u4E00\u7D22\u5F15\uFF1F</p><p>\u7531\u4E8E\u552F\u4E00\u7D22\u5F15\u7528\u4E0D\u4E0A change buffer \u7684\u4F18\u5316\u673A\u5236\uFF0C\u56E0\u6B64\u5982\u679C\u4E1A\u52A1\u53EF\u4EE5\u63A5\u53D7\uFF0C\u4ECE\u6027\u80FD\u89D2\u5EA6\u51FA\u53D1\u5EFA\u8BAE\u4F60\u4F18\u5148\u8003\u8651\u975E\u552F\u4E00\u7D22\u5F15\u3002</p></li></ul><h3 id="_8\u3001\u4EC0\u4E48\u662F\u8986\u76D6\u7D22\u5F15\u548C\u7D22\u5F15\u4E0B\u63A8" tabindex="-1"><a class="header-anchor" href="#_8\u3001\u4EC0\u4E48\u662F\u8986\u76D6\u7D22\u5F15\u548C\u7D22\u5F15\u4E0B\u63A8" aria-hidden="true">#</a> 8\u3001\u4EC0\u4E48\u662F\u8986\u76D6\u7D22\u5F15\u548C\u7D22\u5F15\u4E0B\u63A8\uFF1F</h3><p>\u8986\u76D6\u7D22\u5F15\uFF1A</p><ul><li><p>\u5728\u67D0\u4E2A\u67E5\u8BE2\u91CC\u9762\uFF0C\u7D22\u5F15 k \u5DF2\u7ECF\u201C\u8986\u76D6\u4E86\u201D\u6211\u4EEC\u7684\u67E5\u8BE2\u9700\u6C42\uFF0C\u79F0\u4E3A\u8986\u76D6\u7D22\u5F15\u3002</p></li><li><p>\u8986\u76D6\u7D22\u5F15\u53EF\u4EE5\u51CF\u5C11\u6811\u7684\u641C\u7D22\u6B21\u6570\uFF0C\u663E\u8457\u63D0\u5347\u67E5\u8BE2\u6027\u80FD\uFF0C\u6240\u4EE5\u4F7F\u7528\u8986\u76D6\u7D22\u5F15\u662F\u4E00\u4E2A\u5E38\u7528\u7684\u6027\u80FD\u4F18\u5316\u624B\u6BB5\u3002</p></li></ul><p>\u7D22\u5F15\u4E0B\u63A8\uFF1A</p><ul><li>MySQL 5.6 \u5F15\u5165\u7684\u7D22\u5F15\u4E0B\u63A8\u4F18\u5316\uFF08index condition pushdown)\uFF0C \u53EF\u4EE5\u5728\u7D22\u5F15\u904D\u5386\u8FC7\u7A0B\u4E2D\uFF0C\u5BF9\u7D22\u5F15\u4E2D\u5305\u542B\u7684\u5B57\u6BB5\u5148\u505A\u5224\u65AD\uFF0C\u76F4\u63A5\u8FC7\u6EE4\u6389\u4E0D\u6EE1\u8DB3\u6761\u4EF6\u7684\u8BB0\u5F55\uFF0C\u51CF\u5C11\u56DE\u8868\u6B21\u6570\u3002</li></ul><h3 id="_9\u3001\u54EA\u4E9B\u64CD\u4F5C\u4F1A\u5BFC\u81F4\u7D22\u5F15\u5931\u6548" tabindex="-1"><a class="header-anchor" href="#_9\u3001\u54EA\u4E9B\u64CD\u4F5C\u4F1A\u5BFC\u81F4\u7D22\u5F15\u5931\u6548" aria-hidden="true">#</a> 9\u3001\u54EA\u4E9B\u64CD\u4F5C\u4F1A\u5BFC\u81F4\u7D22\u5F15\u5931\u6548\uFF1F</h3><ul><li>\u5BF9\u7D22\u5F15\u4F7F\u7528\u5DE6\u6216\u8005\u5DE6\u53F3\u6A21\u7CCA\u5339\u914D\uFF0C\u4E5F\u5C31\u662F like %xx \u6216\u8005 like %xx% \u8FD9\u4E24\u79CD\u65B9\u5F0F\u90FD\u4F1A\u9020\u6210\u7D22\u5F15\u5931\u6548\u3002\u539F\u56E0\u5728\u4E8E\u67E5\u8BE2\u7684\u7ED3\u679C\u53EF\u80FD\u662F\u591A\u4E2A\uFF0C\u4E0D\u77E5\u9053\u4ECE\u54EA\u4E2A\u7D22\u5F15\u503C\u5F00\u59CB\u6BD4\u8F83\uFF0C\u4E8E\u662F\u5C31\u53EA\u80FD\u901A\u8FC7\u5168\u8868\u626B\u63CF\u7684\u65B9\u5F0F\u6765\u67E5\u8BE2\u3002</li><li>\u5BF9\u7D22\u5F15\u8FDB\u884C\u51FD\u6570/\u5BF9\u7D22\u5F15\u8FDB\u884C\u8868\u8FBE\u5F0F\u8BA1\u7B97\uFF0C\u56E0\u4E3A\u7D22\u5F15\u4FDD\u6301\u7684\u662F\u7D22\u5F15\u5B57\u6BB5\u7684\u539F\u59CB\u503C\uFF0C\u800C\u4E0D\u662F\u7ECF\u8FC7\u51FD\u6570\u8BA1\u7B97\u7684\u503C\uFF0C\u81EA\u7136\u5C31\u6CA1\u529E\u6CD5\u8D70\u7D22\u5F15\u3002</li><li>\u5BF9\u7D22\u5F15\u8FDB\u884C\u9690\u5F0F\u8F6C\u6362\u76F8\u5F53\u4E8E\u4F7F\u7528\u4E86\u65B0\u51FD\u6570\u3002</li><li>WHERE \u5B50\u53E5\u4E2D\u7684 OR\u8BED\u53E5\uFF0C\u53EA\u8981\u6709\u6761\u4EF6\u5217\u4E0D\u662F\u7D22\u5F15\u5217\uFF0C\u5C31\u4F1A\u8FDB\u884C\u5168\u8868\u626B\u63CF\u3002</li></ul><h3 id="_10\u3001\u5B57\u7B26\u4E32\u52A0\u7D22\u5F15" tabindex="-1"><a class="header-anchor" href="#_10\u3001\u5B57\u7B26\u4E32\u52A0\u7D22\u5F15" aria-hidden="true">#</a> 10\u3001\u5B57\u7B26\u4E32\u52A0\u7D22\u5F15</h3><ul><li>\u76F4\u63A5\u521B\u5EFA\u5B8C\u6574\u7D22\u5F15\uFF0C\u8FD9\u6837\u53EF\u80FD\u4F1A\u6BD4\u8F83\u5360\u7528\u7A7A\u95F4\u3002</li><li>\u521B\u5EFA\u524D\u7F00\u7D22\u5F15\uFF0C\u8282\u7701\u7A7A\u95F4\uFF0C\u4F46\u4F1A\u589E\u52A0\u67E5\u8BE2\u626B\u63CF\u6B21\u6570\uFF0C\u5E76\u4E14\u4E0D\u80FD\u4F7F\u7528\u8986\u76D6\u7D22\u5F15\u3002</li><li>\u5012\u5E8F\u5B58\u50A8\uFF0C\u518D\u521B\u5EFA\u524D\u7F00\u7D22\u5F15\uFF0C\u7528\u4E8E\u7ED5\u8FC7\u5B57\u7B26\u4E32\u672C\u8EAB\u524D\u7F00\u7684\u533A\u5206\u5EA6\u4E0D\u591F\u7684\u95EE\u9898\u3002</li><li>\u521B\u5EFA hash \u5B57\u6BB5\u7D22\u5F15\uFF0C\u67E5\u8BE2\u6027\u80FD\u7A33\u5B9A\uFF0C\u6709\u989D\u5916\u7684\u5B58\u50A8\u548C\u8BA1\u7B97\u6D88\u8017\uFF0C\u8DDF\u7B2C\u4E09\u79CD\u65B9\u5F0F\u4E00\u6837\uFF0C\u90FD\u4E0D\u652F\u6301\u8303\u56F4\u626B\u63CF\u3002</li></ul><h2 id="\u65E5\u5FD7\u76F8\u5173" tabindex="-1"><a class="header-anchor" href="#\u65E5\u5FD7\u76F8\u5173" aria-hidden="true">#</a> \u65E5\u5FD7\u76F8\u5173</h2><h3 id="_11\u3001mysql-\u7684-change-buffer-\u662F\u4EC0\u4E48" tabindex="-1"><a class="header-anchor" href="#_11\u3001mysql-\u7684-change-buffer-\u662F\u4EC0\u4E48" aria-hidden="true">#</a> 11\u3001MySQL \u7684 change buffer \u662F\u4EC0\u4E48\uFF1F</h3><ul><li>\u5F53\u9700\u8981\u66F4\u65B0\u4E00\u4E2A\u6570\u636E\u9875\u65F6\uFF0C\u5982\u679C\u6570\u636E\u9875\u5728\u5185\u5B58\u4E2D\u5C31\u76F4\u63A5\u66F4\u65B0\uFF1B\u800C\u5982\u679C\u8FD9\u4E2A\u6570\u636E\u9875\u8FD8\u6CA1\u6709\u5728\u5185\u5B58\u4E2D\u7684\u8BDD\uFF0C\u5728\u4E0D\u5F71\u54CD\u6570\u636E\u4E00\u81F4\u6027\u7684\u524D\u63D0\u4E0B\uFF0CInnoDB \u4F1A\u5C06\u8FD9\u4E9B\u66F4\u65B0\u64CD\u4F5C\u7F13\u5B58\u5728 change buffer \u4E2D\u3002</li><li>\u8FD9\u6837\u5C31\u4E0D\u9700\u8981\u4ECE\u78C1\u76D8\u4E2D\u8BFB\u5165\u8FD9\u4E2A\u6570\u636E\u9875\u4E86\uFF0C\u5728\u4E0B\u6B21\u67E5\u8BE2\u9700\u8981\u8BBF\u95EE\u8FD9\u4E2A\u6570\u636E\u9875\u7684\u65F6\u5019\uFF0C\u5C06\u6570\u636E\u9875\u8BFB\u5165\u5185\u5B58\uFF0C\u7136\u540E\u6267\u884C change buffer \u4E2D\u4E0E\u8FD9\u4E2A\u9875\u6709\u5173\u7684\u64CD\u4F5C\u3002\u901A\u8FC7\u8FD9\u79CD\u65B9\u5F0F\u5C31\u80FD\u4FDD\u8BC1\u8FD9\u4E2A\u6570\u636E\u903B\u8F91\u7684\u6B63\u786E\u6027\u3002</li><li>\u6CE8\u610F\u552F\u4E00\u7D22\u5F15\u7684\u66F4\u65B0\u5C31\u4E0D\u80FD\u4F7F\u7528 change buffer\uFF0C\u5B9E\u9645\u4E0A\u4E5F\u53EA\u6709\u666E\u901A\u7D22\u5F15\u53EF\u4EE5\u4F7F\u7528\u3002</li><li>\u9002\u7528\u573A\u666F\uFF1A</li><li><ul><li>\u5BF9\u4E8E\u5199\u591A\u8BFB\u5C11\u7684\u4E1A\u52A1\u6765\u8BF4\uFF0C\u9875\u9762\u5728\u5199\u5B8C\u4EE5\u540E\u9A6C\u4E0A\u88AB\u8BBF\u95EE\u5230\u7684\u6982\u7387\u6BD4\u8F83\u5C0F\uFF0C\u6B64\u65F6 change buffer \u7684\u4F7F\u7528\u6548\u679C\u6700\u597D\u3002\u8FD9\u79CD\u4E1A\u52A1\u6A21\u578B\u5E38\u89C1\u7684\u5C31\u662F\u8D26\u5355\u7C7B\u3001\u65E5\u5FD7\u7C7B\u7684\u7CFB\u7EDF\u3002</li><li>\u53CD\u8FC7\u6765\uFF0C\u5047\u8BBE\u4E00\u4E2A\u4E1A\u52A1\u7684\u66F4\u65B0\u6A21\u5F0F\u662F\u5199\u5165\u4E4B\u540E\u9A6C\u4E0A\u4F1A\u505A\u67E5\u8BE2\uFF0C\u90A3\u4E48\u5373\u4F7F\u6EE1\u8DB3\u4E86\u6761\u4EF6\uFF0C\u5C06\u66F4\u65B0\u5148\u8BB0\u5F55\u5728 change buffer\uFF0C\u4F46\u4E4B\u540E\u7531\u4E8E\u9A6C\u4E0A\u8981\u8BBF\u95EE\u8FD9\u4E2A\u6570\u636E\u9875\uFF0C\u4F1A\u7ACB\u5373\u89E6\u53D1 merge \u8FC7\u7A0B\u3002\u8FD9\u6837\u968F\u673A\u8BBF\u95EE IO \u7684\u6B21\u6570\u4E0D\u4F1A\u51CF\u5C11\uFF0C\u53CD\u800C\u589E\u52A0\u4E86 change buffer \u7684\u7EF4\u62A4\u4EE3\u4EF7\u3002</li></ul></li></ul><h3 id="_12\u3001mysql-\u662F\u5982\u4F55\u5224\u65AD\u4E00\u884C\u626B\u63CF\u6570\u7684" tabindex="-1"><a class="header-anchor" href="#_12\u3001mysql-\u662F\u5982\u4F55\u5224\u65AD\u4E00\u884C\u626B\u63CF\u6570\u7684" aria-hidden="true">#</a> 12\u3001MySQL \u662F\u5982\u4F55\u5224\u65AD\u4E00\u884C\u626B\u63CF\u6570\u7684\uFF1F</h3><ul><li>MySQL \u5728\u771F\u6B63\u5F00\u59CB\u6267\u884C\u8BED\u53E5\u4E4B\u524D\uFF0C\u5E76\u4E0D\u80FD\u7CBE\u786E\u5730\u77E5\u9053\u6EE1\u8DB3\u8FD9\u4E2A\u6761\u4EF6\u7684\u8BB0\u5F55\u6709\u591A\u5C11\u6761\u3002</li><li>\u800C\u53EA\u80FD\u6839\u636E\u7EDF\u8BA1\u4FE1\u606F\u6765\u4F30\u7B97\u8BB0\u5F55\u6570\u3002\u8FD9\u4E2A\u7EDF\u8BA1\u4FE1\u606F\u5C31\u662F\u7D22\u5F15\u7684\u201C\u533A\u5206\u5EA6\u3002</li></ul><h3 id="_13\u3001mysql-\u7684-redo-log-\u548C-binlog-\u533A\u522B" tabindex="-1"><a class="header-anchor" href="#_13\u3001mysql-\u7684-redo-log-\u548C-binlog-\u533A\u522B" aria-hidden="true">#</a> 13\u3001MySQL \u7684 redo log \u548C binlog \u533A\u522B\uFF1F</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/herongwei/mysql-a2b8e123-41cb-4717-9225-3a8b49197004.png" alt=""></p><h3 id="_14\u3001\u4E3A\u4EC0\u4E48\u9700\u8981-redo-log" tabindex="-1"><a class="header-anchor" href="#_14\u3001\u4E3A\u4EC0\u4E48\u9700\u8981-redo-log" aria-hidden="true">#</a> 14\u3001\u4E3A\u4EC0\u4E48\u9700\u8981 redo log\uFF1F</h3><ul><li>redo log \u4E3B\u8981\u7528\u4E8E MySQL \u5F02\u5E38\u91CD\u542F\u540E\u7684\u4E00\u79CD\u6570\u636E\u6062\u590D\u624B\u6BB5\uFF0C\u786E\u4FDD\u4E86\u6570\u636E\u7684\u4E00\u81F4\u6027\u3002</li><li>\u5176\u5B9E\u662F\u4E3A\u4E86\u914D\u5408 MySQL \u7684 WAL \u673A\u5236\u3002\u56E0\u4E3A MySQL \u8FDB\u884C\u66F4\u65B0\u64CD\u4F5C\uFF0C\u4E3A\u4E86\u80FD\u591F\u5FEB\u901F\u54CD\u5E94\uFF0C\u6240\u4EE5\u91C7\u7528\u4E86\u5F02\u6B65\u5199\u56DE\u78C1\u76D8\u7684\u6280\u672F\uFF0C\u5199\u5165\u5185\u5B58\u540E\u5C31\u8FD4\u56DE\u3002\u4F46\u662F\u8FD9\u6837\uFF0C\u4F1A\u5B58\u5728 <strong>crash\u540E</strong> \u5185\u5B58\u6570\u636E\u4E22\u5931\u7684\u9690\u60A3\uFF0C\u800C redo log \u5177\u5907 crash safe \u7684\u80FD\u529B\u3002</li></ul><h3 id="_15\u3001\u4E3A\u4EC0\u4E48-redo-log-\u5177\u6709-crash-safe-\u7684\u80FD\u529B-\u662F-binlog-\u65E0\u6CD5\u66FF\u4EE3\u7684" tabindex="-1"><a class="header-anchor" href="#_15\u3001\u4E3A\u4EC0\u4E48-redo-log-\u5177\u6709-crash-safe-\u7684\u80FD\u529B-\u662F-binlog-\u65E0\u6CD5\u66FF\u4EE3\u7684" aria-hidden="true">#</a> 15\u3001\u4E3A\u4EC0\u4E48 redo log \u5177\u6709 crash-safe \u7684\u80FD\u529B\uFF0C\u662F binlog \u65E0\u6CD5\u66FF\u4EE3\u7684\uFF1F</h3><p>\u7B2C\u4E00\u70B9\uFF1Aredo log \u53EF\u786E\u4FDD innoDB \u5224\u65AD\u54EA\u4E9B\u6570\u636E\u5DF2\u7ECF\u5237\u76D8\uFF0C\u54EA\u4E9B\u6570\u636E\u8FD8\u6CA1\u6709</p><ul><li><p>redo log \u548C binlog \u6709\u4E00\u4E2A\u5F88\u5927\u7684\u533A\u522B\u5C31\u662F\uFF0C\u4E00\u4E2A\u662F\u5FAA\u73AF\u5199\uFF0C\u4E00\u4E2A\u662F\u8FFD\u52A0\u5199\u3002\u4E5F\u5C31\u662F\u8BF4 redo log \u53EA\u4F1A\u8BB0\u5F55\u672A\u5237\u76D8\u7684\u65E5\u5FD7\uFF0C\u5DF2\u7ECF\u5237\u5165\u78C1\u76D8\u7684\u6570\u636E\u90FD\u4F1A\u4ECE redo log \u8FD9\u4E2A\u6709\u9650\u5927\u5C0F\u7684\u65E5\u5FD7\u6587\u4EF6\u91CC\u5220\u9664\u3002binlog \u662F\u8FFD\u52A0\u65E5\u5FD7\uFF0C\u4FDD\u5B58\u7684\u662F\u5168\u91CF\u7684\u65E5\u5FD7\u3002</p></li><li><p>\u5F53\u6570\u636E\u5E93 crash \u540E\uFF0C\u60F3\u8981\u6062\u590D<strong>\u672A\u5237\u76D8\u4F46\u5DF2\u7ECF\u5199\u5165 redo log \u548C binlog \u7684\u6570\u636E</strong>\u5230\u5185\u5B58\u65F6\uFF0Cbinlog \u662F\u65E0\u6CD5\u6062\u590D\u7684\u3002\u867D\u7136 binlog \u62E5\u6709\u5168\u91CF\u7684\u65E5\u5FD7\uFF0C\u4F46\u6CA1\u6709\u4E00\u4E2A\u6807\u5FD7\u8BA9 innoDB \u5224\u65AD\u54EA\u4E9B\u6570\u636E\u5DF2\u7ECF\u5237\u76D8\uFF0C\u54EA\u4E9B\u6570\u636E\u8FD8\u6CA1\u6709\u3002</p></li><li><p>\u4F46 redo log \u4E0D\u4E00\u6837\uFF0C\u53EA\u8981\u5237\u5165\u78C1\u76D8\u7684\u6570\u636E\uFF0C\u90FD\u4F1A\u4ECE redo log \u4E2D\u62B9\u6389\uFF0C\u56E0\u4E3A\u662F\u5FAA\u73AF\u5199\uFF01\u6570\u636E\u5E93\u91CD\u542F\u540E\uFF0C\u76F4\u63A5\u628A redo log \u4E2D\u7684\u6570\u636E\u90FD\u6062\u590D\u81F3\u5185\u5B58\u5C31\u53EF\u4EE5\u4E86\u3002</p></li></ul><p>\u7B2C\u4E8C\u70B9\uFF1A\u5982\u679C redo log \u5199\u5165\u5931\u8D25\uFF0C\u8BF4\u660E\u6B64\u6B21\u64CD\u4F5C\u5931\u8D25\uFF0C\u4E8B\u52A1\u4E5F\u4E0D\u53EF\u80FD\u63D0\u4EA4</p><ul><li>redo log \u6BCF\u6B21\u66F4\u65B0\u64CD\u4F5C\u5B8C\u6210\u540E\uFF0C\u5C31\u4E00\u5B9A\u4F1A\u5199\u5165\u65E5\u5FD7\uFF0C\u5982\u679C<strong>\u5199\u5165\u5931\u8D25</strong>\uFF0C\u8BF4\u660E\u6B64\u6B21\u64CD\u4F5C\u5931\u8D25\uFF0C\u4E8B\u52A1\u4E5F\u4E0D\u53EF\u80FD\u63D0\u4EA4\u3002</li><li>redo log \u5185\u90E8\u7ED3\u6784\u662F\u57FA\u4E8E\u9875\u7684\uFF0C\u8BB0\u5F55\u4E86\u8FD9\u4E2A\u9875\u7684\u5B57\u6BB5\u503C\u53D8\u5316\uFF0C\u53EA\u8981crash\u540E\u8BFB\u53D6redo log\u8FDB\u884C\u91CD\u653E\uFF0C\u5C31\u53EF\u4EE5\u6062\u590D\u6570\u636E\u3002</li><li>\u8FD9\u5C31\u662F\u4E3A\u4EC0\u4E48 redo log \u5177\u6709 crash-safe \u7684\u80FD\u529B\uFF0C\u800C binlog \u4E0D\u5177\u5907\u3002</li></ul><h3 id="_16\u3001\u5F53\u6570\u636E\u5E93-crash-\u540E-\u5982\u4F55\u6062\u590D\u672A\u5237\u76D8\u7684\u6570\u636E\u5230\u5185\u5B58\u4E2D" tabindex="-1"><a class="header-anchor" href="#_16\u3001\u5F53\u6570\u636E\u5E93-crash-\u540E-\u5982\u4F55\u6062\u590D\u672A\u5237\u76D8\u7684\u6570\u636E\u5230\u5185\u5B58\u4E2D" aria-hidden="true">#</a> 16\u3001\u5F53\u6570\u636E\u5E93 crash \u540E\uFF0C\u5982\u4F55\u6062\u590D\u672A\u5237\u76D8\u7684\u6570\u636E\u5230\u5185\u5B58\u4E2D\uFF1F</h3><p>\u6839\u636E redo log \u548C binlog \u7684\u4E24\u9636\u6BB5\u63D0\u4EA4\uFF0C\u672A\u6301\u4E45\u5316\u7684\u6570\u636E\u5206\u4E3A\u51E0\u79CD\u60C5\u51B5\uFF1A</p><ul><li><p>change buffer \u5199\u5165\uFF0Credo log \u867D\u7136\u505A\u4E86 fsync \u4F46\u672A commit\uFF0Cbinlog \u672A fsync \u5230\u78C1\u76D8\uFF0C\u8FD9\u90E8\u5206\u6570\u636E\u4E22\u5931\u3002</p></li><li><p>change buffer \u5199\u5165\uFF0Credo log fsync \u672A commit\uFF0Cbinlog \u5DF2\u7ECF fsync \u5230\u78C1\u76D8\uFF0C\u5148\u4ECE binlog \u6062\u590D redo log\uFF0C\u518D\u4ECE redo log \u6062\u590D change buffer\u3002</p></li><li><p>change buffer \u5199\u5165\uFF0Credo log \u548C binlog \u90FD\u5DF2\u7ECF fsync\uFF0C\u76F4\u63A5\u4ECE redo log \u91CC\u6062\u590D\u3002</p></li></ul><h3 id="_17\u3001redo-log-\u5199\u5165\u65B9\u5F0F" tabindex="-1"><a class="header-anchor" href="#_17\u3001redo-log-\u5199\u5165\u65B9\u5F0F" aria-hidden="true">#</a> 17\u3001redo log \u5199\u5165\u65B9\u5F0F\uFF1F</h3><p>redo log\u5305\u62EC\u4E24\u90E8\u5206\u5185\u5BB9\uFF0C\u5206\u522B\u662F\u5185\u5B58\u4E2D\u7684<strong>\u65E5\u5FD7\u7F13\u51B2</strong>(redo log buffer)\u548C\u78C1\u76D8\u4E0A\u7684<strong>\u65E5\u5FD7\u6587\u4EF6</strong>(redo log file)\u3002</p><p>MySQL \u6BCF\u6267\u884C\u4E00\u6761 DML \u8BED\u53E5\uFF0C\u4F1A\u5148\u628A\u8BB0\u5F55\u5199\u5165 <strong>redo log buffer\uFF08\u7528\u6237\u7A7A\u95F4\uFF09</strong> \uFF0C\u518D\u4FDD\u5B58\u5230\u5185\u6838\u7A7A\u95F4\u7684\u7F13\u51B2\u533A OS-buffer \u4E2D\uFF0C\u540E\u7EED\u67D0\u4E2A\u65F6\u95F4\u70B9\u518D\u4E00\u6B21\u6027\u5C06\u591A\u4E2A\u64CD\u4F5C\u8BB0\u5F55\u5199\u5230 <strong>redo log file\uFF08\u5237\u76D8\uFF09</strong> \u3002\u8FD9\u79CD\u5148\u5199\u65E5\u5FD7\uFF0C\u518D\u5199\u78C1\u76D8\u7684\u6280\u672F\uFF0C\u5C31\u662F<strong>WAL</strong>\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/herongwei/mysql-f901a97f-9d82-4d4e-a5be-559a64b3d9b8.png" alt=""></p><p>\u53EF\u4EE5\u53D1\u73B0\uFF0Credo log buffer\u5199\u5165\u5230redo log file\uFF0C\u662F\u7ECF\u8FC7OS buffer\u4E2D\u8F6C\u7684\u3002\u5176\u5B9E\u53EF\u4EE5\u901A\u8FC7\u53C2\u6570innodb_flush_log_at_trx_commit\u8FDB\u884C\u914D\u7F6E\uFF0C\u53C2\u6570\u503C\u542B\u4E49\u5982\u4E0B\uFF1A</p><ul><li>0\uFF1A\u79F0\u4E3A<strong>\u5EF6\u8FDF\u5199</strong>\uFF0C\u4E8B\u52A1\u63D0\u4EA4\u65F6\u4E0D\u4F1A\u5C06redo log buffer\u4E2D\u65E5\u5FD7\u5199\u5165\u5230OS buffer\uFF0C\u800C\u662F\u6BCF\u79D2\u5199\u5165OS buffer\u5E76\u8C03\u7528\u5199\u5165\u5230redo log file\u4E2D\u3002</li><li>1\uFF1A\u79F0\u4E3A<strong>\u5B9E\u65F6\u5199</strong>\uFF0C\u5B9E\u65F6\u5237\u201D\uFF0C\u4E8B\u52A1\u6BCF\u6B21\u63D0\u4EA4\u90FD\u4F1A\u5C06redo log buffer\u4E2D\u7684\u65E5\u5FD7\u5199\u5165OS buffer\u5E76\u4FDD\u5B58\u5230redo log file\u4E2D\u3002</li><li>2\uFF1A \u79F0\u4E3A<strong>\u5B9E\u65F6\u5199\uFF0C\u5EF6\u8FDF\u5237</strong>\u3002\u6BCF\u6B21\u4E8B\u52A1\u63D0\u4EA4\u5199\u5165\u5230OS buffer\uFF0C\u7136\u540E\u662F\u6BCF\u79D2\u5C06\u65E5\u5FD7\u5199\u5165\u5230redo log file\u3002</li></ul><h3 id="_18\u3001redo-log-\u7684\u6267\u884C\u6D41\u7A0B" tabindex="-1"><a class="header-anchor" href="#_18\u3001redo-log-\u7684\u6267\u884C\u6D41\u7A0B" aria-hidden="true">#</a> 18\u3001redo log \u7684\u6267\u884C\u6D41\u7A0B?</h3><p>\u6211\u4EEC\u6765\u770B\u4E0BRedo log\u7684\u6267\u884C\u6D41\u7A0B\uFF0C\u5047\u8BBE\u6267\u884C\u7684 SQL \u5982\u4E0B\uFF1A</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>update T set a =1 where id =666
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/herongwei/mysql-43fe6587-0cb8-49aa-bd93-0119e46430d7.png" alt=""></p><ol><li>MySQL \u5BA2\u6237\u7AEF\u5C06\u8BF7\u6C42\u8BED\u53E5 update T set a =1 where id =666\uFF0C\u53D1\u5F80 MySQL Server \u5C42\u3002</li><li>MySQL Server \u5C42\u63A5\u6536\u5230 SQL \u8BF7\u6C42\u540E\uFF0C\u5BF9\u5176\u8FDB\u884C\u5206\u6790\u3001\u4F18\u5316\u3001\u6267\u884C\u7B49\u5904\u7406\u5DE5\u4F5C\uFF0C\u5C06\u751F\u6210\u7684 SQL \u6267\u884C\u8BA1\u5212\u53D1\u5230 InnoDB \u5B58\u50A8\u5F15\u64CE\u5C42\u6267\u884C\u3002</li><li>InnoDB \u5B58\u50A8\u5F15\u64CE\u5C42\u5C06<strong>a\u4FEE\u6539\u4E3A1</strong>\u7684\u8FD9\u4E2A\u64CD\u4F5C\u8BB0\u5F55\u5230\u5185\u5B58\u4E2D\u3002</li><li>\u8BB0\u5F55\u5230\u5185\u5B58\u4EE5\u540E\u4F1A\u4FEE\u6539 redo log \u7684\u8BB0\u5F55\uFF0C\u4F1A\u5728\u6DFB\u52A0\u4E00\u884C\u8BB0\u5F55\uFF0C\u5176\u5185\u5BB9\u662F<strong>\u9700\u8981\u5728\u54EA\u4E2A\u6570\u636E\u9875\u4E0A\u505A\u4EC0\u4E48\u4FEE\u6539</strong>\u3002</li><li>\u6B64\u540E\uFF0C\u5C06\u4E8B\u52A1\u7684\u72B6\u6001\u8BBE\u7F6E\u4E3A prepare \uFF0C\u8BF4\u660E\u5DF2\u7ECF\u51C6\u5907\u597D\u63D0\u4EA4\u4E8B\u52A1\u4E86\u3002</li><li>\u7B49\u5230 MySQL Server \u5C42\u5904\u7406\u5B8C\u4E8B\u52A1\u4EE5\u540E\uFF0C\u4F1A\u5C06\u4E8B\u52A1\u7684\u72B6\u6001\u8BBE\u7F6E\u4E3A <strong>commit</strong>\uFF0C\u4E5F\u5C31\u662F\u63D0\u4EA4\u8BE5\u4E8B\u52A1\u3002</li><li>\u5728\u6536\u5230\u4E8B\u52A1\u63D0\u4EA4\u7684\u8BF7\u6C42\u4EE5\u540E\uFF0C<strong>redo log</strong> \u4F1A\u628A\u521A\u624D\u5199\u5165\u5185\u5B58\u4E2D\u7684\u64CD\u4F5C\u8BB0\u5F55\u5199\u5165\u5230\u78C1\u76D8\u4E2D\uFF0C\u4ECE\u800C\u5B8C\u6210\u6574\u4E2A\u65E5\u5FD7\u7684\u8BB0\u5F55\u8FC7\u7A0B\u3002</li></ol><h3 id="_19\u3001binlog-\u7684\u6982\u5FF5\u662F\u4EC0\u4E48-\u8D77\u5230\u4EC0\u4E48\u4F5C\u7528-\u53EF\u4EE5\u4FDD\u8BC1-crash-safe-\u5417" tabindex="-1"><a class="header-anchor" href="#_19\u3001binlog-\u7684\u6982\u5FF5\u662F\u4EC0\u4E48-\u8D77\u5230\u4EC0\u4E48\u4F5C\u7528-\u53EF\u4EE5\u4FDD\u8BC1-crash-safe-\u5417" aria-hidden="true">#</a> 19\u3001binlog \u7684\u6982\u5FF5\u662F\u4EC0\u4E48\uFF0C\u8D77\u5230\u4EC0\u4E48\u4F5C\u7528\uFF0C \u53EF\u4EE5\u4FDD\u8BC1 crash-safe \u5417?</h3><ul><li>binlog \u662F\u5F52\u6863\u65E5\u5FD7\uFF0C\u5C5E\u4E8E MySQL Server \u5C42\u7684\u65E5\u5FD7\u3002\u53EF\u4EE5\u5B9E\u73B0<strong>\u4E3B\u4ECE\u590D\u5236</strong>\u548C<strong>\u6570\u636E\u6062\u590D</strong>\u4E24\u4E2A\u4F5C\u7528\u3002</li><li>\u5F53\u9700\u8981<strong>\u6062\u590D\u6570\u636E</strong>\u65F6\uFF0C\u53EF\u4EE5\u53D6\u51FA\u67D0\u4E2A\u65F6\u95F4\u8303\u56F4\u5185\u7684 binlog \u8FDB\u884C\u91CD\u653E\u6062\u590D\u3002</li><li>\u4F46\u662F binlog \u4E0D\u53EF\u4EE5\u505A crash safe\uFF0C\u56E0\u4E3A crash \u4E4B\u524D\uFF0Cbinlog <strong>\u53EF\u80FD\u6CA1\u6709\u5199\u5165\u5B8C\u5168</strong> MySQL \u5C31\u6302\u4E86\u3002\u6240\u4EE5\u9700\u8981\u914D\u5408 <strong>redo log</strong> \u624D\u53EF\u4EE5\u8FDB\u884C crash safe\u3002</li></ul><h3 id="_20\u3001\u4EC0\u4E48\u662F\u4E24\u9636\u6BB5\u63D0\u4EA4" tabindex="-1"><a class="header-anchor" href="#_20\u3001\u4EC0\u4E48\u662F\u4E24\u9636\u6BB5\u63D0\u4EA4" aria-hidden="true">#</a> 20\u3001\u4EC0\u4E48\u662F\u4E24\u9636\u6BB5\u63D0\u4EA4\uFF1F</h3><p>MySQL \u5C06 redo log \u7684\u5199\u5165\u62C6\u6210\u4E86\u4E24\u4E2A\u6B65\u9AA4\uFF1Aprepare \u548C commit\uFF0C\u4E2D\u95F4\u518D\u7A7F\u63D2\u5199\u5165binlog\uFF0C\u8FD9\u5C31\u662F&quot;\u4E24\u9636\u6BB5\u63D0\u4EA4&quot;\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/herongwei/mysql-11420486-f9d0-483a-ba2e-a742ec4c518d.png" alt=""></p><p>\u800C\u4E24\u9636\u6BB5\u63D0\u4EA4\u5C31\u662F\u8BA9\u8FD9\u4E24\u4E2A\u72B6\u6001\u4FDD\u6301\u903B\u8F91\u4E0A\u7684\u4E00\u81F4\u3002redolog \u7528\u4E8E\u6062\u590D\u4E3B\u673A\u6545\u969C\u65F6\u7684\u672A\u66F4\u65B0\u7684\u7269\u7406\u6570\u636E\uFF0Cbinlog \u7528\u4E8E\u5907\u4EFD\u64CD\u4F5C\u3002\u4E24\u8005\u672C\u8EAB\u5C31\u662F\u4E24\u4E2A\u72EC\u7ACB\u7684\u4E2A\u4F53\uFF0C\u8981\u60F3\u4FDD\u6301\u4E00\u81F4\uFF0C\u5C31\u5FC5\u987B\u4F7F\u7528\u5206\u5E03\u5F0F\u4E8B\u52A1\u7684\u89E3\u51B3\u65B9\u6848\u6765\u5904\u7406\u3002</p><p><strong>\u4E3A\u4EC0\u4E48\u9700\u8981\u4E24\u9636\u6BB5\u63D0\u4EA4\u5462?</strong></p><ul><li>\u5982\u679C\u4E0D\u7528\u4E24\u9636\u6BB5\u63D0\u4EA4\u7684\u8BDD\uFF0C\u53EF\u80FD\u4F1A\u51FA\u73B0\u8FD9\u6837\u60C5\u51B5</li><li>\u5148\u5199 redo log\uFF0Ccrash \u540E bin log \u5907\u4EFD\u6062\u590D\u65F6\u5C11\u4E86\u4E00\u6B21\u66F4\u65B0\uFF0C\u4E0E\u5F53\u524D\u6570\u636E\u4E0D\u4E00\u81F4\u3002</li><li>\u5148\u5199 bin log\uFF0Ccrash \u540E\uFF0C\u7531\u4E8E redo log \u6CA1\u5199\u5165\uFF0C\u4E8B\u52A1\u65E0\u6548\uFF0C\u6240\u4EE5\u540E\u7EED bin log \u5907\u4EFD\u6062\u590D\u65F6\uFF0C\u6570\u636E\u4E0D\u4E00\u81F4\u3002</li><li>\u4E24\u9636\u6BB5\u63D0\u4EA4\u5C31\u662F\u4E3A\u4E86\u4FDD\u8BC1 redo log \u548C binlog \u6570\u636E\u7684\u5B89\u5168\u4E00\u81F4\u6027\u3002\u53EA\u6709\u5728\u8FD9\u4E24\u4E2A\u65E5\u5FD7\u6587\u4EF6\u903B\u8F91\u4E0A\u9AD8\u5EA6\u4E00\u81F4\u4E86\u624D\u80FD\u653E\u5FC3\u7684\u4F7F\u7528\u3002</li></ul><p>\u5728\u6062\u590D\u6570\u636E\u65F6\uFF0Credolog \u72B6\u6001\u4E3A commit \u5219\u8BF4\u660E binlog \u4E5F\u6210\u529F\uFF0C\u76F4\u63A5\u6062\u590D\u6570\u636E\uFF1B\u5982\u679C redolog \u662F prepare\uFF0C\u5219\u9700\u8981\u67E5\u8BE2\u5BF9\u5E94\u7684 binlog\u4E8B\u52A1\u662F\u5426\u6210\u529F\uFF0C\u51B3\u5B9A\u662F\u56DE\u6EDA\u8FD8\u662F\u6267\u884C\u3002</p><h3 id="_21\u3001mysql-\u600E\u4E48\u77E5\u9053-binlog-\u662F\u5B8C\u6574\u7684" tabindex="-1"><a class="header-anchor" href="#_21\u3001mysql-\u600E\u4E48\u77E5\u9053-binlog-\u662F\u5B8C\u6574\u7684" aria-hidden="true">#</a> 21\u3001MySQL \u600E\u4E48\u77E5\u9053 binlog \u662F\u5B8C\u6574\u7684?</h3><p>\u4E00\u4E2A\u4E8B\u52A1\u7684 binlog \u662F\u6709\u5B8C\u6574\u683C\u5F0F\u7684\uFF1A</p><ul><li>statement \u683C\u5F0F\u7684 binlog\uFF0C\u6700\u540E\u4F1A\u6709 COMMIT\uFF1B</li><li>row \u683C\u5F0F\u7684 binlog\uFF0C\u6700\u540E\u4F1A\u6709\u4E00\u4E2A XID event\u3002</li></ul><h3 id="_22\u3001\u4EC0\u4E48\u662F-wal-\u6280\u672F-\u6709\u4EC0\u4E48\u4F18\u70B9" tabindex="-1"><a class="header-anchor" href="#_22\u3001\u4EC0\u4E48\u662F-wal-\u6280\u672F-\u6709\u4EC0\u4E48\u4F18\u70B9" aria-hidden="true">#</a> 22\u3001\u4EC0\u4E48\u662F WAL \u6280\u672F\uFF0C\u6709\u4EC0\u4E48\u4F18\u70B9\uFF1F</h3><p>WAL\uFF0C\u4E2D\u6587\u5168\u79F0\u662F Write-Ahead Logging\uFF0C\u5B83\u7684\u5173\u952E\u70B9\u5C31\u662F\u65E5\u5FD7\u5148\u5199\u5185\u5B58\uFF0C\u518D\u5199\u78C1\u76D8\u3002MySQL \u6267\u884C\u66F4\u65B0\u64CD\u4F5C\u540E\uFF0C<strong>\u5728\u771F\u6B63\u628A\u6570\u636E\u5199\u5165\u5230\u78C1\u76D8\u524D\uFF0C\u5148\u8BB0\u5F55\u65E5\u5FD7</strong>\u3002</p><p>\u597D\u5904\u662F\u4E0D\u7528\u6BCF\u4E00\u6B21\u64CD\u4F5C\u90FD\u5B9E\u65F6\u628A\u6570\u636E\u5199\u76D8\uFF0C\u5C31\u7B97 crash \u540E\u4E5F\u53EF\u4EE5\u901A\u8FC7redo log \u6062\u590D\uFF0C\u6240\u4EE5\u80FD\u591F\u5B9E\u73B0\u5FEB\u901F\u54CD\u5E94 SQL \u8BED\u53E5\u3002</p><h3 id="_23\u3001binlog-\u65E5\u5FD7\u7684\u4E09\u79CD\u683C\u5F0F" tabindex="-1"><a class="header-anchor" href="#_23\u3001binlog-\u65E5\u5FD7\u7684\u4E09\u79CD\u683C\u5F0F" aria-hidden="true">#</a> 23\u3001binlog \u65E5\u5FD7\u7684\u4E09\u79CD\u683C\u5F0F</h3><p>binlog \u65E5\u5FD7\u6709\u4E09\u79CD\u683C\u5F0F</p><ul><li>Statement\uFF1A\u57FA\u4E8ESQL\u8BED\u53E5\u7684\u590D\u5236((statement-based replication,SBR))</li><li>Row\uFF1A\u57FA\u4E8E\u884C\u7684\u590D\u5236\u3002(row-based replication,RBR)</li><li>Mixed\uFF1A\u6DF7\u5408\u6A21\u5F0F\u590D\u5236\u3002(mixed-based replication,MBR)</li></ul><p><strong>Statement\u683C\u5F0F</strong></p><p>\u6BCF\u4E00\u6761\u4F1A\u4FEE\u6539\u6570\u636E\u7684 SQL \u90FD\u4F1A\u8BB0\u5F55\u5728 binlog \u4E2D</p><ul><li>\u4F18\u70B9\uFF1A\u4E0D\u9700\u8981\u8BB0\u5F55\u6BCF\u4E00\u884C\u7684\u53D8\u5316\uFF0C\u51CF\u5C11\u4E86binlog\u65E5\u5FD7\u91CF\uFF0C\u8282\u7EA6\u4E86IO\uFF0C\u63D0\u9AD8\u6027\u80FD\u3002</li><li>\u7F3A\u70B9\uFF1A\u7531\u4E8E\u8BB0\u5F55\u7684\u53EA\u662F\u6267\u884C\u8BED\u53E5\uFF0C\u4E3A\u4E86\u8FD9\u4E9B\u8BED\u53E5\u80FD\u5728\u5907\u5E93\u4E0A\u6B63\u786E\u8FD0\u884C\uFF0C\u8FD8\u5FC5\u987B\u8BB0\u5F55\u6BCF\u6761\u8BED\u53E5\u5728\u6267\u884C\u7684\u65F6\u5019\u7684\u4E00\u4E9B\u76F8\u5173\u4FE1\u606F\uFF0C\u4EE5\u4FDD\u8BC1\u6240\u6709\u8BED\u53E5\u80FD\u5728\u5907\u5E93\u5F97\u5230\u548C\u5728\u4E3B\u5E93\u7AEF\u6267\u884C\u65F6\u5019\u76F8\u540C\u7684\u7ED3\u679C\u3002</li></ul><p><strong>Row\u683C\u5F0F</strong></p><p>\u4E0D\u8BB0\u5F55 SQL \u8BED\u53E5\u4E0A\u4E0B\u6587\u76F8\u5173\u4FE1\u606F\uFF0C\u4EC5\u4FDD\u5B58\u54EA\u6761\u8BB0\u5F55\u88AB\u4FEE\u6539\u3002</p><ul><li>\u4F18\u70B9\uFF1Abinlog \u4E2D\u53EF\u4EE5\u4E0D\u8BB0\u5F55\u6267\u884C\u7684 SQL \u8BED\u53E5\u7684\u4E0A\u4E0B\u6587\u76F8\u5173\u7684\u4FE1\u606F\uFF0C\u4EC5\u9700\u8981\u8BB0\u5F55\u90A3\u4E00\u6761\u8BB0\u5F55\u88AB\u4FEE\u6539\u6210\u4EC0\u4E48\u4E86\u3002\u6240\u4EE5rowlevel\u7684\u65E5\u5FD7\u5185\u5BB9\u4F1A\u975E\u5E38\u6E05\u695A\u7684\u8BB0\u5F55\u4E0B\u6BCF\u4E00\u884C\u6570\u636E\u4FEE\u6539\u7684\u7EC6\u8282\u3002\u4E0D\u4F1A\u51FA\u73B0\u67D0\u4E9B\u7279\u5B9A\u60C5\u51B5\u4E0B\u7684\u5B58\u50A8\u8FC7\u7A0B\u3001\u6216 function\u3001\u6216trigger\u7684\u8C03\u7528\u548C\u89E6\u53D1\u65E0\u6CD5\u88AB\u6B63\u786E\u590D\u5236\u7684\u95EE\u9898\u3002</li><li>\u7F3A\u70B9:\u53EF\u80FD\u4F1A\u4EA7\u751F\u5927\u91CF\u7684\u65E5\u5FD7\u5185\u5BB9\u3002</li></ul><p><strong>Mixed\u683C\u5F0F</strong></p><p>\u5B9E\u9645\u4E0A\u5C31\u662F Statement \u4E0E Row \u7684\u7ED3\u5408\u3002\u4E00\u822C\u7684\u8BED\u53E5\u4FEE\u6539\u4F7F\u7528 statment \u683C\u5F0F\u4FDD\u5B58 binlog\uFF0C\u5982\u4E00\u4E9B\u51FD\u6570\uFF0Cstatement \u65E0\u6CD5\u5B8C\u6210\u4E3B\u4ECE\u590D\u5236\u7684\u64CD\u4F5C\uFF0C\u5219\u91C7\u7528 row \u683C\u5F0F\u4FDD\u5B58 binlog\uFF0CMySQL \u4F1A\u6839\u636E\u6267\u884C\u7684\u6BCF\u4E00\u6761\u5177\u4F53\u7684 SQL \u8BED\u53E5\u6765\u533A\u5206\u5BF9\u5F85\u8BB0\u5F55\u7684\u65E5\u5FD7\u5F62\u5F0F\u3002</p><h3 id="_24\u3001redo-log\u65E5\u5FD7\u683C\u5F0F" tabindex="-1"><a class="header-anchor" href="#_24\u3001redo-log\u65E5\u5FD7\u683C\u5F0F" aria-hidden="true">#</a> 24\u3001redo log\u65E5\u5FD7\u683C\u5F0F</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/herongwei/mysql-ee8a859f-d1e8-4ab6-94d1-9733373be825.png" alt=""></p><p>redo log buffer (\u5185\u5B58\u4E2D)\u662F\u7531\u9996\u5C3E\u76F8\u8FDE\u7684\u56DB\u4E2A\u6587\u4EF6\u7EC4\u6210\u7684\uFF0C\u5B83\u4EEC\u5206\u522B\u662F\uFF1Aib_logfile_1\u3001ib_logfile_2\u3001ib_logfile_3\u3001ib_logfile_4\u3002</p><ul><li>write pos \u662F\u5F53\u524D\u8BB0\u5F55\u7684\u4F4D\u7F6E\uFF0C\u4E00\u8FB9\u5199\u4E00\u8FB9\u540E\u79FB\uFF0C\u5199\u5230\u7B2C 3 \u53F7\u6587\u4EF6\u672B\u5C3E\u540E\u5C31\u56DE\u5230 0 \u53F7\u6587\u4EF6\u5F00\u5934\u3002</li><li>checkpoint \u662F\u5F53\u524D\u8981\u64E6\u9664\u7684\u4F4D\u7F6E\uFF0C\u4E5F\u662F\u5F80\u540E\u63A8\u79FB\u5E76\u4E14\u5FAA\u73AF\u7684\uFF0C\u64E6\u9664\u8BB0\u5F55\u524D\u8981\u628A\u8BB0\u5F55\u66F4\u65B0\u5230\u6570\u636E\u6587\u4EF6\u3002</li><li>write pos \u548C checkpoint \u4E4B\u95F4\u7684\u662F\u201C\u7C89\u677F\u201D\u4E0A\u8FD8\u7A7A\u7740\u7684\u90E8\u5206\uFF0C\u53EF\u4EE5\u7528\u6765\u8BB0\u5F55\u65B0\u7684\u64CD\u4F5C\u3002</li><li>\u5982\u679C write pos \u8FFD\u4E0A checkpoint\uFF0C\u8868\u793A\u201C\u7C89\u677F\u201D\u6EE1\u4E86\uFF0C\u8FD9\u65F6\u5019\u4E0D\u80FD\u518D\u6267\u884C\u65B0\u7684\u66F4\u65B0\uFF0C\u5F97\u505C\u4E0B\u6765\u5148\u64E6\u6389\u4E00\u4E9B\u8BB0\u5F55\uFF0C\u628A checkpoint \u63A8\u8FDB\u4E00\u4E0B\u3002</li><li>\u6709\u4E86 redo log\uFF0C\u5F53\u6570\u636E\u5E93\u53D1\u751F\u5B95\u673A\u91CD\u542F\u540E\uFF0C\u53EF\u901A\u8FC7 redo log\u5C06\u672A\u843D\u76D8\u7684\u6570\u636E\uFF08check point\u4E4B\u540E\u7684\u6570\u636E\uFF09\u6062\u590D\uFF0C\u4FDD\u8BC1\u5DF2\u7ECF\u63D0\u4EA4\u7684\u4E8B\u52A1\u8BB0\u5F55\u4E0D\u4F1A\u4E22\u5931\uFF0C\u8FD9\u79CD\u80FD\u529B\u79F0\u4E3A<strong>crash-safe</strong>\u3002</li></ul><h3 id="_25\u3001\u539F\u672C\u53EF\u4EE5\u6267\u884C\u5F97\u5F88\u5FEB\u7684-sql-\u8BED\u53E5-\u6267\u884C\u901F\u5EA6\u5374\u6BD4\u9884\u671F\u7684\u6162\u5F88\u591A-\u539F\u56E0\u662F\u4EC0\u4E48-\u5982\u4F55\u89E3\u51B3" tabindex="-1"><a class="header-anchor" href="#_25\u3001\u539F\u672C\u53EF\u4EE5\u6267\u884C\u5F97\u5F88\u5FEB\u7684-sql-\u8BED\u53E5-\u6267\u884C\u901F\u5EA6\u5374\u6BD4\u9884\u671F\u7684\u6162\u5F88\u591A-\u539F\u56E0\u662F\u4EC0\u4E48-\u5982\u4F55\u89E3\u51B3" aria-hidden="true">#</a> 25\u3001\u539F\u672C\u53EF\u4EE5\u6267\u884C\u5F97\u5F88\u5FEB\u7684 SQL \u8BED\u53E5\uFF0C\u6267\u884C\u901F\u5EA6\u5374\u6BD4\u9884\u671F\u7684\u6162\u5F88\u591A\uFF0C\u539F\u56E0\u662F\u4EC0\u4E48\uFF1F\u5982\u4F55\u89E3\u51B3\uFF1F</h3><p>\u539F\u56E0\uFF1A\u4ECE\u5927\u5230\u5C0F\u53EF\u5206\u4E3A\u56DB\u79CD\u60C5\u51B5</p><ul><li>MySQL \u6570\u636E\u5E93\u672C\u8EAB\u88AB\u5835\u4F4F\u4E86\uFF0C\u6BD4\u5982\uFF1A\u7CFB\u7EDF\u6216\u7F51\u7EDC\u8D44\u6E90\u4E0D\u591F\u3002</li><li>SQL \u8BED\u53E5\u88AB\u5835\u4F4F\u4E86\uFF0C\u6BD4\u5982\uFF1A\u8868\u9501\uFF0C\u884C\u9501\u7B49\uFF0C\u5BFC\u81F4\u5B58\u50A8\u5F15\u64CE\u4E0D\u6267\u884C\u5BF9\u5E94\u7684 SQL \u8BED\u53E5\u3002</li><li>\u786E\u5B9E\u662F\u7D22\u5F15\u4F7F\u7528\u4E0D\u5F53\uFF0C\u6CA1\u6709\u8D70\u7D22\u5F15\u3002</li><li>\u8868\u4E2D\u6570\u636E\u7684\u7279\u70B9\u5BFC\u81F4\u7684\uFF0C\u8D70\u4E86\u7D22\u5F15\uFF0C\u4F46\u56DE\u8868\u6B21\u6570\u5E9E\u5927\u3002</li></ul><p>\u89E3\u51B3\uFF1A</p><ul><li>\u8003\u8651\u91C7\u7528 force index \u5F3A\u884C\u9009\u62E9\u4E00\u4E2A\u7D22\u5F15</li><li>\u8003\u8651\u4FEE\u6539\u8BED\u53E5\uFF0C\u5F15\u5BFC MySQL \u4F7F\u7528\u6211\u4EEC\u671F\u671B\u7684\u7D22\u5F15\u3002\u6BD4\u5982\u628A\u201Corder by b limit 1\u201D \u6539\u6210 \u201Corder by b,a limit 1\u201D \uFF0C\u8BED\u4E49\u7684\u903B\u8F91\u662F\u76F8\u540C\u7684\u3002</li><li>\u7B2C\u4E09\u79CD\u65B9\u6CD5\u662F\uFF0C\u5728\u6709\u4E9B\u573A\u666F\u4E0B\uFF0C\u53EF\u4EE5\u65B0\u5EFA\u4E00\u4E2A\u66F4\u5408\u9002\u7684\u7D22\u5F15\uFF0C\u6765\u63D0\u4F9B\u7ED9\u4F18\u5316\u5668\u505A\u9009\u62E9\uFF0C\u6216\u5220\u6389\u8BEF\u7528\u7684\u7D22\u5F15\u3002</li><li>\u5982\u679C\u786E\u5B9A\u662F\u7D22\u5F15\u6839\u672C\u6CA1\u5FC5\u8981\uFF0C\u53EF\u4EE5\u8003\u8651\u5220\u9664\u7D22\u5F15\u3002</li></ul><h3 id="_26\u3001innodb-\u6570\u636E\u9875\u7ED3\u6784" tabindex="-1"><a class="header-anchor" href="#_26\u3001innodb-\u6570\u636E\u9875\u7ED3\u6784" aria-hidden="true">#</a> 26\u3001InnoDB \u6570\u636E\u9875\u7ED3\u6784</h3><p>\u4E00\u4E2A\u6570\u636E\u9875\u5927\u81F4\u5212\u5206\u4E03\u4E2A\u90E8\u5206</p><ul><li>File Header\uFF1A\u8868\u793A\u9875\u7684\u4E00\u4E9B\u901A\u7528\u4FE1\u606F\uFF0C\u5360\u56FA\u5B9A\u768438\u5B57\u8282\u3002</li><li>page Header\uFF1A\u8868\u793A\u6570\u636E\u9875\u4E13\u6709\u4FE1\u606F\uFF0C\u5360\u56FA\u5B9A\u768456\u5B57\u8282\u3002</li><li>inimum+Supermum\uFF1A\u4E24\u4E2A\u865A\u62DF\u7684\u4F2A\u8BB0\u5F55\uFF0C\u5206\u522B\u8868\u793A\u9875\u4E2D\u7684\u6700\u5C0F\u8BB0\u5F55\u548C\u6700\u5927\u8BB0\u5F55\uFF0C\u5360\u56FA\u5B9A\u768426\u5B57\u8282\u3002</li><li>User Records\uFF1A\u771F\u6B63\u5B58\u50A8\u6211\u4EEC\u63D2\u5165\u7684\u6570\u636E\uFF0C\u5927\u5C0F\u4E0D\u56FA\u5B9A\u3002</li><li>Free Space\uFF1A\u9875\u4E2D\u5C1A\u672A\u4F7F\u7528\u7684\u90E8\u5206\uFF0C\u5927\u5C0F\u4E0D\u56FA\u5B9A\u3002</li><li>Page Directory\uFF1A\u9875\u4E2D\u67D0\u4E9B\u8BB0\u5F55\u7684\u76F8\u5BF9\u4F4D\u7F6E\uFF0C\u4E5F\u5C31\u662F\u5404\u4E2A\u69FD\u5BF9\u5E94\u7684\u8BB0\u5F55\u5728\u9875\u9762\u4E2D\u7684\u5730\u5740\u504F\u79FB\u91CF\u3002</li><li>File Trailer\uFF1A\u7528\u4E8E\u68C0\u9A8C\u9875\u662F\u5426\u5B8C\u6574\uFF0C\u5360\u56FA\u5B9A\u5927\u5C0F 8 \u5B57\u8282\u3002</li></ul><h2 id="\u6570\u636E\u76F8\u5173" tabindex="-1"><a class="header-anchor" href="#\u6570\u636E\u76F8\u5173" aria-hidden="true">#</a> \u6570\u636E\u76F8\u5173</h2><h3 id="_27\u3001mysql-\u662F\u5982\u4F55\u4FDD\u8BC1\u6570\u636E\u4E0D\u4E22\u5931\u7684" tabindex="-1"><a class="header-anchor" href="#_27\u3001mysql-\u662F\u5982\u4F55\u4FDD\u8BC1\u6570\u636E\u4E0D\u4E22\u5931\u7684" aria-hidden="true">#</a> 27\u3001MySQL \u662F\u5982\u4F55\u4FDD\u8BC1\u6570\u636E\u4E0D\u4E22\u5931\u7684\uFF1F</h3><ul><li>\u53EA\u8981redolog \u548C binlog \u4FDD\u8BC1\u6301\u4E45\u5316\u78C1\u76D8\u5C31\u80FD\u786E\u4FDDMySQL\u5F02\u5E38\u91CD\u542F\u540E\u56DE\u590D\u6570\u636E</li><li>\u5728\u6062\u590D\u6570\u636E\u65F6\uFF0Credolog \u72B6\u6001\u4E3A commit \u5219\u8BF4\u660E binlog \u4E5F\u6210\u529F\uFF0C\u76F4\u63A5\u6062\u590D\u6570\u636E\uFF1B\u5982\u679C redolog \u662F prepare\uFF0C\u5219\u9700\u8981\u67E5\u8BE2\u5BF9\u5E94\u7684 binlog\u4E8B\u52A1\u662F\u5426\u6210\u529F\uFF0C\u51B3\u5B9A\u662F\u56DE\u6EDA\u8FD8\u662F\u6267\u884C\u3002</li></ul><h3 id="_28\u3001\u8BEF\u5220\u6570\u636E\u600E\u4E48\u529E" tabindex="-1"><a class="header-anchor" href="#_28\u3001\u8BEF\u5220\u6570\u636E\u600E\u4E48\u529E" aria-hidden="true">#</a> 28\u3001\u8BEF\u5220\u6570\u636E\u600E\u4E48\u529E\uFF1F</h3><p>DBA \u7684\u6700\u6838\u5FC3\u7684\u5DE5\u4F5C\u5C31\u662F\u4FDD\u8BC1\u6570\u636E\u7684\u5B8C\u6574\u6027\uFF0C\u5148\u8981\u505A\u597D\u9884\u9632\uFF0C\u9884\u9632\u7684\u8BDD\u5927\u6982\u662F\u901A\u8FC7\u8FD9\u51E0\u4E2A\u70B9\uFF1A</p><ul><li>\u6743\u9650\u63A7\u5236\u4E0E\u5206\u914D(\u6570\u636E\u5E93\u548C\u670D\u52A1\u5668\u6743\u9650)</li><li>\u5236\u4F5C\u64CD\u4F5C\u89C4\u8303</li><li>\u5B9A\u671F\u7ED9\u5F00\u53D1\u8FDB\u884C\u57F9\u8BAD</li><li>\u642D\u5EFA\u5EF6\u8FDF\u5907\u5E93</li><li>\u505A\u597D SQL \u5BA1\u8BA1\uFF0C\u53EA\u8981\u662F\u5BF9\u7EBF\u4E0A\u6570\u636E\u6709\u66F4\u6539\u64CD\u4F5C\u7684\u8BED\u53E5(DML\u548CDDL)\u90FD\u9700\u8981\u8FDB\u884C\u5BA1\u6838</li><li>\u505A\u597D\u5907\u4EFD\u3002\u5907\u4EFD\u7684\u8BDD\u53C8\u5206\u4E3A\u4E24\u4E2A\u70B9 (1)\u5982\u679C\u6570\u636E\u91CF\u6BD4\u8F83\u5927\uFF0C\u7528\u7269\u7406\u5907\u4EFD xtrabackup\u3002\u5B9A\u671F\u5BF9\u6570\u636E\u5E93\u8FDB\u884C\u5168\u91CF\u5907\u4EFD\uFF0C\u4E5F\u53EF\u4EE5\u505A\u589E\u91CF\u5907\u4EFD\u3002 (2)\u5982\u679C\u6570\u636E\u91CF\u8F83\u5C11\uFF0C\u7528 mysqldump \u6216\u8005 mysqldumper\u3002\u518D\u5229\u7528 binlog \u6765\u6062\u590D\u6216\u8005\u642D\u5EFA\u4E3B\u4ECE\u7684\u65B9\u5F0F\u6765\u6062\u590D\u6570\u636E\u3002 \u5B9A\u671F\u5907\u4EFDbinlog \u6587\u4EF6\u4E5F\u662F\u5F88\u6709\u5FC5\u8981\u7684</li><li>\u5982\u679C\u53D1\u751F\u4E86\u6570\u636E\u5220\u9664\u7684\u64CD\u4F5C\uFF0C\u53C8\u53EF\u4EE5\u4ECE\u4EE5\u4E0B\u51E0\u4E2A\u70B9\u6765\u6062\u590D:</li><li>DML \u8BEF\u64CD\u4F5C\u8BED\u53E5\u9020\u6210\u6570\u636E\u4E0D\u5B8C\u6574\u6216\u8005\u4E22\u5931\u3002\u53EF\u4EE5\u901A\u8FC7 flashback\uFF0C\u7F8E\u56E2\u7684 myflash\uFF0C\u4E5F\u662F\u4E00\u4E2A\u4E0D\u9519\u7684\u5DE5\u5177\uFF0C\u672C\u8D28\u90FD\u5DEE\u4E0D\u591A\uFF0C\u90FD\u662F\u5148\u89E3\u6790 binlog event\uFF0C\u7136\u540E\u5728\u8FDB\u884C\u53CD\u8F6C\u3002\u628A delete \u53CD\u8F6C\u4E3Ainsert\uFF0Cinsert \u53CD\u8F6C\u4E3A delete\uFF0Cupdate\u524D\u540E image \u5BF9\u8C03\u3002\u6240\u4EE5\u5FC5\u987B\u8BBE\u7F6Ebinlog_format=row \u548C binlog_row_image=full\uFF0C\u5207\u8BB0\u6062\u590D\u6570\u636E\u7684\u65F6\u5019\uFF0C\u5E94\u8BE5\u5148\u6062\u590D\u5230\u4E34\u65F6\u7684\u5B9E\u4F8B\uFF0C\u7136\u540E\u5728\u6062\u590D\u56DE\u4E3B\u5E93\u4E0A\u3002</li><li>DDL\u8BED\u53E5\u8BEF\u64CD\u4F5C(truncate\u548Cdrop)\uFF0C\u7531\u4E8EDDL\u8BED\u53E5\u4E0D\u7BA1 binlog_format \u662F row \u8FD8\u662F statement \uFF0C\u5728 binlog \u91CC\u90FD\u53EA\u8BB0\u5F55\u8BED\u53E5\uFF0C\u4E0D\u8BB0\u5F55 image \u6240\u4EE5\u6062\u590D\u8D77\u6765\u76F8\u5BF9\u8981\u9EBB\u70E6\u5F97\u591A\u3002\u53EA\u80FD\u901A\u8FC7\u5168\u91CF\u5907\u4EFD+\u5E94\u7528 binlog \u7684\u65B9\u5F0F\u6765\u6062\u590D\u6570\u636E\u3002\u4E00\u65E6\u6570\u636E\u91CF\u6BD4\u8F83\u5927\uFF0C\u90A3\u4E48\u6062\u590D\u65F6\u95F4\u5C31\u7279\u522B\u957F</li><li>rm \u5220\u9664\uFF1A\u4F7F\u7528\u5907\u4EFD\u8DE8\u673A\u623F\uFF0C\u6216\u8005\u6700\u597D\u662F\u8DE8\u57CE\u5E02\u4FDD\u5B58\u3002</li></ul><h3 id="_29\u3001drop\u3001truncate-\u548C-delete-\u7684\u533A\u522B" tabindex="-1"><a class="header-anchor" href="#_29\u3001drop\u3001truncate-\u548C-delete-\u7684\u533A\u522B" aria-hidden="true">#</a> 29\u3001drop\u3001truncate \u548C delete \u7684\u533A\u522B</h3><ul><li>DELETE \u8BED\u53E5\u6267\u884C\u5220\u9664\u7684\u8FC7\u7A0B\u662F\u6BCF\u6B21\u4ECE\u8868\u4E2D\u5220\u9664\u4E00\u884C\uFF0C\u5E76\u4E14\u540C\u65F6\u5C06\u8BE5\u884C\u7684\u5220\u9664\u64CD\u4F5C\u4F5C\u4E3A\u4E8B\u52A1\u8BB0\u5F55\u5728\u65E5\u5FD7\u4E2D\u4FDD\u5B58\u4EE5\u4FBF\u8FDB\u884C\u8FDB\u884C\u56DE\u6EDA\u64CD\u4F5C\u3002</li><li>TRUNCATE TABLE \u5219\u4E00\u6B21\u6027\u5730\u4ECE\u8868\u4E2D\u5220\u9664\u6240\u6709\u7684\u6570\u636E\u5E76\u4E0D\u628A\u5355\u72EC\u7684\u5220\u9664\u64CD\u4F5C\u8BB0\u5F55\u8BB0\u5165\u65E5\u5FD7\u4FDD\u5B58\uFF0C\u5220\u9664\u884C\u662F\u4E0D\u80FD\u6062\u590D\u7684\u3002\u5E76\u4E14\u5728\u5220\u9664\u7684\u8FC7\u7A0B\u4E2D\u4E0D\u4F1A\u6FC0\u6D3B\u4E0E\u8868\u6709\u5173\u7684\u5220\u9664\u89E6\u53D1\u5668\u3002\u6267\u884C\u901F\u5EA6\u5FEB\u3002</li><li>drop\u8BED\u53E5\u5C06\u8868\u6240\u5360\u7528\u7684\u7A7A\u95F4\u5168\u91CA\u653E\u6389\u3002</li><li>\u5728\u901F\u5EA6\u4E0A\uFF0C\u4E00\u822C\u6765\u8BF4\uFF0Cdrop&gt; truncate &gt; delete\u3002</li><li>\u5982\u679C\u60F3\u5220\u9664\u90E8\u5206\u6570\u636E\u7528 delete\uFF0C\u6CE8\u610F\u5E26\u4E0A where \u5B50\u53E5\uFF0C\u56DE\u6EDA\u6BB5\u8981\u8DB3\u591F\u5927\uFF1B</li><li>\u5982\u679C\u60F3\u5220\u9664\u8868\uFF0C\u5F53\u7136\u7528 drop\uFF1B \u5982\u679C\u60F3\u4FDD\u7559\u8868\u800C\u5C06\u6240\u6709\u6570\u636E\u5220\u9664\uFF0C\u5982\u679C\u548C\u4E8B\u52A1\u65E0\u5173\uFF0C\u7528 truncate \u5373\u53EF\uFF1B</li><li>\u5982\u679C\u548C\u4E8B\u52A1\u6709\u5173\uFF0C\u6216\u8005\u60F3\u89E6\u53D1 trigger\uFF0C\u8FD8\u662F\u7528 delete\uFF1B \u5982\u679C\u662F\u6574\u7406\u8868\u5185\u90E8\u7684\u788E\u7247\uFF0C\u53EF\u4EE5\u7528 truncate \u8DDF\u4E0A reuse stroage\uFF0C\u518D\u91CD\u65B0\u5BFC\u5165/\u63D2\u5165\u6570\u636E\u3002</li></ul><h3 id="_30\u3001\u5728-mysql-\u4E2D\u6709\u4E24\u4E2A-kill-\u547D\u4EE4" tabindex="-1"><a class="header-anchor" href="#_30\u3001\u5728-mysql-\u4E2D\u6709\u4E24\u4E2A-kill-\u547D\u4EE4" aria-hidden="true">#</a> 30\u3001\u5728 MySQL \u4E2D\u6709\u4E24\u4E2A kill \u547D\u4EE4</h3><ul><li>\u4E00\u4E2A\u662F kill query + \u7EBF\u7A0B id\uFF0C\u8868\u793A\u7EC8\u6B62\u8FD9\u4E2A\u7EBF\u7A0B\u4E2D\u6B63\u5728\u6267\u884C\u7684\u8BED\u53E5</li><li>\u4E00\u4E2A\u662F kill connection + \u7EBF\u7A0B id\uFF0C\u8FD9\u91CC connection \u53EF\u7F3A\u7701\uFF0C\u8868\u793A\u65AD\u5F00\u8FD9\u4E2A\u7EBF\u7A0B\u7684\u8FDE\u63A5</li></ul><p>kill \u4E0D\u6389\u7684\u539F\u56E0</p><ul><li>kill\u547D\u4EE4\u88AB\u5835\u4E86\uFF0C\u8FD8\u6CA1\u5230\u4F4D</li><li>kill\u547D\u4EE4\u5230\u4F4D\u4E86\uFF0C\u4F46\u662F\u6CA1\u88AB\u7ACB\u523B\u89E6\u53D1</li><li>kill\u547D\u4EE4\u88AB\u89E6\u53D1\u4E86\uFF0C\u4F46\u6267\u884C\u5B8C\u4E5F\u9700\u8981\u65F6\u95F4</li></ul><h3 id="_31\u3001\u5982\u4F55\u7406\u89E3-mysql-\u7684\u8FB9\u8BFB\u8FB9\u53D1" tabindex="-1"><a class="header-anchor" href="#_31\u3001\u5982\u4F55\u7406\u89E3-mysql-\u7684\u8FB9\u8BFB\u8FB9\u53D1" aria-hidden="true">#</a> 31\u3001\u5982\u4F55\u7406\u89E3 MySQL \u7684\u8FB9\u8BFB\u8FB9\u53D1</h3><ul><li>\u5982\u679C\u5BA2\u6237\u7AEF\u63A5\u53D7\u6162\uFF0C\u4F1A\u5BFC\u81F4 MySQL \u670D\u52A1\u7AEF\u7531\u4E8E\u7ED3\u679C\u53D1\u4E0D\u51FA\u53BB\uFF0C\u8FD9\u4E2A\u4E8B\u52A1\u7684\u6267\u884C\u65F6\u95F4\u4F1A\u5F88\u957F\u3002</li><li>\u670D\u52A1\u7AEF\u5E76\u4E0D\u9700\u8981\u4FDD\u5B58\u4E00\u4E2A\u5B8C\u6574\u7684\u7ED3\u679C\u96C6\uFF0C\u53D6\u6570\u636E\u548C\u53D1\u6570\u636E\u7684\u6D41\u7A0B\u90FD\u662F\u901A\u8FC7\u4E00\u4E2A next_buffer \u6765\u64CD\u4F5C\u7684\u3002</li><li>\u5185\u5B58\u7684\u6570\u636E\u9875\u90FD\u662F\u5728 Buffer_Pool\u4E2D\u64CD\u4F5C\u7684\u3002</li><li>InnoDB \u7BA1\u7406 Buffer_Pool \u4F7F\u7528\u7684\u662F\u6539\u8FDB\u7684 LRU \u7B97\u6CD5\uFF0C\u4F7F\u7528\u94FE\u8868\u5B9E\u73B0\uFF0C\u5B9E\u73B0\u4E0A\uFF0C\u6309\u7167 5:3 \u7684\u6BD4\u4F8B\u628A\u6574\u4E2A LRU \u94FE\u8868\u5206\u6210\u4E86 young \u533A\u57DF\u548C old \u533A\u57DF\u3002</li></ul><h3 id="_32\u3001mysql-\u7684\u5927\u8868\u67E5\u8BE2\u4E3A\u4EC0\u4E48\u4E0D\u4F1A\u7206\u5185\u5B58" tabindex="-1"><a class="header-anchor" href="#_32\u3001mysql-\u7684\u5927\u8868\u67E5\u8BE2\u4E3A\u4EC0\u4E48\u4E0D\u4F1A\u7206\u5185\u5B58" aria-hidden="true">#</a> 32\u3001MySQL \u7684\u5927\u8868\u67E5\u8BE2\u4E3A\u4EC0\u4E48\u4E0D\u4F1A\u7206\u5185\u5B58\uFF1F</h3><ul><li>\u7531\u4E8E MySQL \u662F\u8FB9\u8BFB\u53D8\u53D1\uFF0C\u56E0\u6B64\u5BF9\u4E8E\u6570\u636E\u91CF\u5F88\u5927\u7684\u67E5\u8BE2\u7ED3\u679C\u6765\u8BF4\uFF0C\u4E0D\u4F1A\u518D server \u7AEF\u4FDD\u5B58\u5B8C\u6574\u7684\u7ED3\u679C\u96C6\uFF0C\u6240\u4EE5\uFF0C\u5982\u679C\u5BA2\u6237\u7AEF\u8BFB\u7ED3\u679C\u4E0D\u53CA\u65F6\uFF0C\u4F1A\u5835\u4F4F MySQL \u7684\u67E5\u8BE2\u8FC7\u7A0B\uFF0C\u4F46\u662F\u4E0D\u4F1A\u628A\u5185\u5B58\u6253\u7206\u3002</li><li>InnoDB \u5F15\u64CE\u5185\u90E8\uFF0C\u7531\u4E8E\u6709\u6DD8\u6C70\u7B56\u7565\uFF0CInnoDB \u7BA1\u7406 Buffer_Pool \u4F7F\u7528\u7684\u662F\u6539\u8FDB\u7684 LRU \u7B97\u6CD5\uFF0C\u4F7F\u7528\u94FE\u8868\u5B9E\u73B0\uFF0C\u5B9E\u73B0\u4E0A\uFF0C\u6309\u7167 5:3 \u7684\u6BD4\u4F8B\u628A\u6574\u4E2A LRU \u94FE\u8868\u5206\u6210\u4E86 young \u533A\u57DF\u548C old \u533A\u57DF\u3002\u5BF9\u51B7\u6570\u636E\u7684\u5168\u626B\u63CF\uFF0C\u5F71\u54CD\u4E5F\u80FD\u505A\u5230\u53EF\u63A7\u5236\u3002</li></ul><h3 id="_33\u3001mysql-\u4E34\u65F6\u8868\u7684\u7528\u6CD5\u548C\u7279\u6027" tabindex="-1"><a class="header-anchor" href="#_33\u3001mysql-\u4E34\u65F6\u8868\u7684\u7528\u6CD5\u548C\u7279\u6027" aria-hidden="true">#</a> 33\u3001MySQL \u4E34\u65F6\u8868\u7684\u7528\u6CD5\u548C\u7279\u6027</h3><ul><li>\u53EA\u5BF9\u5F53\u524Dsession\u53EF\u89C1\u3002</li><li>\u53EF\u4EE5\u4E0E\u666E\u901A\u8868\u91CD\u540D\u3002</li><li>\u589E\u5220\u6539\u67E5\u7528\u7684\u662F\u4E34\u65F6\u8868\u3002</li><li>show tables \u4E0D\u663E\u793A\u666E\u901A\u8868\u3002</li><li>\u5728\u5B9E\u9645\u5E94\u7528\u4E2D\uFF0C\u4E34\u65F6\u8868\u4E00\u822C\u7528\u4E8E\u5904\u7406\u6BD4\u8F83\u590D\u6742\u7684\u8BA1\u7B97\u903B\u8F91\u3002</li><li>\u7531\u4E8E\u4E34\u65F6\u8868\u662F\u6BCF\u4E2A\u7EBF\u7A0B\u81EA\u5DF1\u53EF\u89C1\u7684\uFF0C\u6240\u4EE5\u4E0D\u9700\u8981\u8003\u8651\u591A\u4E2A\u7EBF\u7A0B\u6267\u884C\u540C\u4E00\u4E2A\u5904\u7406\u65F6\u4E34\u65F6\u8868\u7684\u91CD\u540D\u95EE\u9898\uFF0C\u5728\u7EBF\u7A0B\u9000\u51FA\u7684\u65F6\u5019\uFF0C\u4E34\u65F6\u8868\u4F1A\u81EA\u52A8\u5220\u9664\u3002</li></ul><h3 id="_34\u3001mysql-\u5B58\u50A8\u5F15\u64CE\u4ECB\u7ECD-innodb\u3001myisam\u3001memory" tabindex="-1"><a class="header-anchor" href="#_34\u3001mysql-\u5B58\u50A8\u5F15\u64CE\u4ECB\u7ECD-innodb\u3001myisam\u3001memory" aria-hidden="true">#</a> 34\u3001MySQL \u5B58\u50A8\u5F15\u64CE\u4ECB\u7ECD\uFF08InnoDB\u3001MyISAM\u3001MEMORY\uFF09</h3><ul><li>InnoDB \u662F\u4E8B\u52A1\u578B\u6570\u636E\u5E93\u7684\u9996\u9009\u5F15\u64CE\uFF0C\u652F\u6301\u4E8B\u52A1\u5B89\u5168\u8868 (ACID)\uFF0C\u652F\u6301\u884C\u9501\u5B9A\u548C\u5916\u952E\u3002MySQL5.5.5 \u4E4B\u540E\uFF0CInnoDB \u4F5C\u4E3A\u9ED8\u8BA4\u5B58\u50A8\u5F15\u64CE</li><li>MyISAM \u57FA\u4E8E ISAM \u7684\u5B58\u50A8\u5F15\u64CE\uFF0C\u5E76\u5BF9\u5176\u8FDB\u884C\u6269\u5C55\u3002\u5B83\u662F\u5728 Web\u3001\u6570\u636E\u5B58\u50A8\u548C\u5176\u4ED6\u5E94\u7528\u73AF\u5883\u4E0B\u6700\u5E38\u7528\u7684\u5B58\u50A8\u5F15\u64CE\u4E4B\u4E00\u3002MyISAM \u62E5\u6709\u8F83\u9AD8\u7684\u63D2\u5165\u3001\u67E5\u8BE2\u901F\u5EA6\uFF0C\u4F46\u4E0D\u652F\u6301\u4E8B\u52A1\u3002\u5728 MySQL5.5.5 \u4E4B\u524D\u7684\u7248\u672C\u4E2D\uFF0CMyISAM \u662F\u9ED8\u8BA4\u5B58\u50A8\u5F15\u64CE</li><li>MEMORY \u5B58\u50A8\u5F15\u64CE\u5C06\u8868\u4E2D\u7684\u6570\u636E\u5B58\u50A8\u5230\u5185\u5B58\u4E2D\uFF0C\u4E3A\u67E5\u8BE2\u548C\u5F15\u7528\u5176\u4ED6\u8868\u6570\u636E\u63D0\u4F9B\u5FEB\u901F\u8BBF\u95EE\u3002</li></ul><h3 id="_35\u3001\u90FD\u8BF4-innodb-\u597D-\u90A3\u8FD8\u8981\u4E0D\u8981\u4F7F\u7528-memory-\u5F15\u64CE" tabindex="-1"><a class="header-anchor" href="#_35\u3001\u90FD\u8BF4-innodb-\u597D-\u90A3\u8FD8\u8981\u4E0D\u8981\u4F7F\u7528-memory-\u5F15\u64CE" aria-hidden="true">#</a> 35\u3001\u90FD\u8BF4 InnoDB \u597D\uFF0C\u90A3\u8FD8\u8981\u4E0D\u8981\u4F7F\u7528 MEMORY \u5F15\u64CE\uFF1F</h3><ul><li>\u5185\u5B58\u8868\u5C31\u662F\u4F7F\u7528 memory \u5F15\u64CE\u521B\u5EFA\u7684\u8868</li><li>\u4E3A\u4EC0\u4E48\u6211\u4E0D\u5EFA\u8BAE\u4F60\u5728\u751F\u4EA7\u73AF\u5883\u4E0A\u4F7F\u7528\u5185\u5B58\u8868\u3002\u8FD9\u91CC\u7684\u539F\u56E0\u4E3B\u8981\u5305\u62EC\u4E24\u4E2A\u65B9\u9762\uFF1A\u9501\u7C92\u5EA6\u95EE\u9898\uFF1B\u6570\u636E\u6301\u4E45\u5316\u95EE\u9898\u3002</li><li>\u7531\u4E8E\u91CD\u542F\u4F1A\u4E22\u6570\u636E\uFF0C\u5982\u679C\u4E00\u4E2A\u5907\u5E93\u91CD\u542F\uFF0C\u4F1A\u5BFC\u81F4\u4E3B\u5907\u540C\u6B65\u7EBF\u7A0B\u505C\u6B62\uFF1B\u5982\u679C\u4E3B\u5E93\u8DDF\u8FD9\u4E2A\u5907\u5E93\u662F\u53CC M \u67B6\u6784\uFF0C\u8FD8\u53EF\u80FD\u5BFC\u81F4\u4E3B\u5E93\u7684\u5185\u5B58\u8868\u6570\u636E\u88AB\u5220\u6389\u3002</li></ul><h3 id="_36\u3001\u5982\u679C\u6570\u636E\u5E93\u8BEF\u64CD\u4F5C-\u5982\u4F55\u6267\u884C\u6570\u636E\u6062\u590D" tabindex="-1"><a class="header-anchor" href="#_36\u3001\u5982\u679C\u6570\u636E\u5E93\u8BEF\u64CD\u4F5C-\u5982\u4F55\u6267\u884C\u6570\u636E\u6062\u590D" aria-hidden="true">#</a> 36\u3001\u5982\u679C\u6570\u636E\u5E93\u8BEF\u64CD\u4F5C, \u5982\u4F55\u6267\u884C\u6570\u636E\u6062\u590D?</h3><p>\u6570\u636E\u5E93\u5728\u67D0\u4E2A\u65F6\u5019\u8BEF\u64CD\u4F5C\uFF0C\u5C31\u53EF\u4EE5\u627E\u5230\u8DDD\u79BB\u8BEF\u64CD\u4F5C\u6700\u8FD1\u7684\u65F6\u95F4\u8282\u70B9\u7684bin log\uFF0C\u91CD\u653E\u5230\u4E34\u65F6\u6570\u636E\u5E93\u91CC\uFF0C\u7136\u540E\u9009\u62E9\u8BEF\u5220\u7684\u6570\u636E\u8282\u70B9\uFF0C\u6062\u590D\u5230\u7EBF\u4E0A\u6570\u636E\u5E93\u3002</p><h2 id="\u4E3B\u4ECE\u5907\u4EFD\u76F8\u5173" tabindex="-1"><a class="header-anchor" href="#\u4E3B\u4ECE\u5907\u4EFD\u76F8\u5173" aria-hidden="true">#</a> \u4E3B\u4ECE\u5907\u4EFD\u76F8\u5173</h2><h3 id="_37\u3001mysql-\u662F\u5982\u4F55\u4FDD\u8BC1\u4E3B\u5907\u540C\u6B65" tabindex="-1"><a class="header-anchor" href="#_37\u3001mysql-\u662F\u5982\u4F55\u4FDD\u8BC1\u4E3B\u5907\u540C\u6B65" aria-hidden="true">#</a> 37\u3001MySQL \u662F\u5982\u4F55\u4FDD\u8BC1\u4E3B\u5907\u540C\u6B65\uFF1F</h3><p>\u4E3B\u5907\u5173\u7CFB\u7684\u5EFA\u7ACB\uFF1A</p><ul><li>\u4E00\u5F00\u59CB\u521B\u5EFA\u4E3B\u5907\u5173\u7CFB\u7684\u65F6\u5019\uFF0C\u662F\u7531\u5907\u5E93\u6307\u5B9A\u7684\uFF0C\u6BD4\u5982\u57FA\u4E8E\u4F4D\u70B9\u7684\u4E3B\u5907\u5173\u7CFB\uFF0C\u5907\u5E93\u8BF4\u201C\u6211\u8981\u4ECEbinlog\u6587\u4EF6A\u7684\u4F4D\u7F6EP\u201D\u5F00\u59CB\u540C\u6B65\uFF0C\u4E3B\u5E93\u5C31\u4ECE\u8FD9\u4E2A\u6307\u5B9A\u7684\u4F4D\u7F6E\u5F00\u59CB\u5F80\u540E\u53D1\u3002</li><li>\u800C\u4E3B\u5907\u5173\u7CFB\u642D\u5EFA\u4E4B\u540E\uFF0C\u662F\u4E3B\u5E93\u51B3\u5B9A\u8981\u53D1\u7ED9\u6570\u636E\u7ED9\u5907\u5E93\u7684\uFF0C\u6240\u4EE5\u4E3B\u5E93\u6709\u65B0\u7684\u65E5\u5FD7\u4E5F\u4F1A\u53D1\u7ED9\u5907\u5E93\u3002</li></ul><p>MySQL \u4E3B\u5907\u5207\u6362\u6D41\u7A0B\uFF1A</p><ul><li>\u5BA2\u6237\u7AEF\u8BFB\u5199\u90FD\u662F\u76F4\u63A5\u8BBF\u95EEA\uFF0C\u800C\u8282\u70B9B\u662F\u5907\u5E93\uFF0C\u53EA\u8981\u5C06A\u7684\u66F4\u65B0\u90FD\u540C\u6B65\u8FC7\u6765\uFF0C\u5230\u672C\u5730\u6267\u884C\u5C31\u53EF\u4EE5\u4FDD\u8BC1\u6570\u636E\u662F\u76F8\u540C\u7684\u3002</li><li>\u5F53\u9700\u8981\u5207\u6362\u7684\u65F6\u5019\u5C31\u628A\u8282\u70B9\u6362\u4E00\u4E0B\uFF0CA\u7684\u8282\u70B9B\u7684\u5907\u5E93</li></ul><p>\u4E00\u4E2A\u4E8B\u52A1\u5B8C\u6574\u7684\u540C\u6B65\u8FC7\u7A0B\uFF1A</p><ul><li><p>\u5907\u5E93B\u548C\u4E3B\u5E93A\u5EFA\u7ACB\u6765\u4E86\u957F\u94FE\u63A5\uFF0C\u4E3B\u5E93A\u5185\u90E8\u4E13\u95E8\u7EBF\u7A0B\u7528\u4E8E\u7EF4\u62A4\u4E86\u8FD9\u4E2A\u957F\u94FE\u63A5\u3002</p></li><li><p>\u5728\u5907\u5E93B\u4E0A\u901A\u8FC7changemaster\u547D\u4EE4\u8BBE\u7F6E\u4E3B\u5E93A\u7684IP\u7AEF\u53E3\u7528\u6237\u540D\u5BC6\u7801\u4EE5\u53CA\u4ECE\u54EA\u4E2A\u4F4D\u7F6E\u5F00\u59CB\u8BF7\u6C42binlog\u5305\u62EC\u6587\u4EF6\u540D\u548C\u65E5\u5FD7\u504F\u79FB\u91CF</p></li><li><p>\u5728\u5907\u5E93B\u4E0A\u6267\u884Cstart-slave\u547D\u4EE4\u5907\u5E93\u4F1A\u542F\u52A8\u4E24\u4E2A\u7EBF\u7A0B\uFF1Aio_thread\u548Csql_thread\u5206\u522B\u8D1F\u8D23\u5EFA\u7ACB\u8FDE\u63A5\u548C\u8BFB\u53D6\u4E2D\u8F6C\u65E5\u5FD7\u8FDB\u884C\u89E3\u6790\u6267\u884C</p></li><li><p>\u5907\u5E93\u8BFB\u53D6\u4E3B\u5E93\u4F20\u8FC7\u6765\u7684binlog\u6587\u4EF6\u5907\u5E93\u6536\u5230\u6587\u4EF6\u5199\u5230\u672C\u5730\u6210\u4E3A\u4E2D\u8F6C\u65E5\u5FD7</p></li><li><p>\u540E\u6765\u7531\u4E8E\u591A\u7EBF\u7A0B\u590D\u5236\u65B9\u6848\u7684\u5F15\u5165\uFF0Csql_thread\u6F14\u5316\u6210\u4E86\u591A\u4E2A\u7EBF\u7A0B\u3002</p></li></ul><h3 id="_38\u3001\u4EC0\u4E48\u662F\u4E3B\u5907\u5EF6\u8FDF" tabindex="-1"><a class="header-anchor" href="#_38\u3001\u4EC0\u4E48\u662F\u4E3B\u5907\u5EF6\u8FDF" aria-hidden="true">#</a> 38\u3001\u4EC0\u4E48\u662F\u4E3B\u5907\u5EF6\u8FDF</h3><p>\u4E3B\u5E93\u548C\u5907\u5E93\u5728\u6267\u884C\u540C\u4E00\u4E2A\u4E8B\u52A1\u7684\u65F6\u5019\u51FA\u73B0\u65F6\u95F4\u5DEE\u7684\u95EE\u9898\uFF0C\u4E3B\u8981\u539F\u56E0\u6709\uFF1A</p><ul><li>\u6709\u4E9B\u90E8\u7F72\u6761\u4EF6\u4E0B\uFF0C\u5907\u5E93\u6240\u5728\u673A\u5668\u7684\u6027\u80FD\u8981\u6BD4\u4E3B\u5E93\u6027\u80FD\u5DEE\u3002</li><li>\u5907\u5E93\u7684\u538B\u529B\u8F83\u5927\u3002</li><li>\u5927\u4E8B\u52A1\uFF0C\u4E00\u4E2A\u4E3B\u5E93\u4E0A\u8BED\u53E5\u6267\u884C10\u5206\u949F\uFF0C\u90A3\u4E48\u8FD9\u4E2A\u4E8B\u52A1\u53EF\u80FD\u4F1A\u5BFC\u81F4\u4ECE\u5E93\u5EF6\u8FDF10\u5206\u949F\u3002</li></ul><h3 id="_39\u3001\u4E3A\u4EC0\u4E48\u8981\u6709\u591A\u7EBF\u7A0B\u590D\u5236\u7B56\u7565" tabindex="-1"><a class="header-anchor" href="#_39\u3001\u4E3A\u4EC0\u4E48\u8981\u6709\u591A\u7EBF\u7A0B\u590D\u5236\u7B56\u7565" aria-hidden="true">#</a> 39\u3001\u4E3A\u4EC0\u4E48\u8981\u6709\u591A\u7EBF\u7A0B\u590D\u5236\u7B56\u7565\uFF1F</h3><ul><li>\u56E0\u4E3A\u5355\u7EBF\u7A0B\u590D\u5236\u7684\u80FD\u529B\u5168\u9762\u4F4E\u4E8E\u591A\u7EBF\u7A0B\u590D\u5236\uFF0C\u5BF9\u4E8E\u66F4\u65B0\u538B\u529B\u8F83\u5927\u7684\u4E3B\u5E93\uFF0C\u5907\u5E93\u53EF\u80FD\u662F\u4E00\u76F4\u8FFD\u4E0D\u4E0A\u4E3B\u5E93\u7684\uFF0C\u5E26\u6765\u7684\u73B0\u8C61\u5C31\u662F\u5907\u5E93\u4E0Aseconds_behind_master\u503C\u8D8A\u6765\u8D8A\u5927\u3002</li><li>\u5728\u5B9E\u9645\u5E94\u7528\u4E2D\uFF0C\u5EFA\u8BAE\u4F7F\u7528\u53EF\u9760\u6027\u4F18\u5148\u7B56\u7565\uFF0C\u51CF\u5C11\u4E3B\u5907\u5EF6\u8FDF\uFF0C\u63D0\u5347\u7CFB\u7EDF\u53EF\u7528\u6027\uFF0C\u5C3D\u91CF\u51CF\u5C11\u5927\u4E8B\u52A1\u64CD\u4F5C\uFF0C\u628A\u5927\u4E8B\u52A1\u62C6\u5206\u5C0F\u4E8B\u52A1\u3002</li></ul><h3 id="_40\u3001mysql-\u7684\u5E76\u884C\u7B56\u7565\u6709\u54EA\u4E9B" tabindex="-1"><a class="header-anchor" href="#_40\u3001mysql-\u7684\u5E76\u884C\u7B56\u7565\u6709\u54EA\u4E9B" aria-hidden="true">#</a> 40\u3001MySQL \u7684\u5E76\u884C\u7B56\u7565\u6709\u54EA\u4E9B\uFF1F</h3><ul><li>\u6309\u8868\u5206\u53D1\u7B56\u7565\uFF1A\u5982\u679C\u4E24\u4E2A\u4E8B\u52A1\u66F4\u65B0\u4E0D\u540C\u7684\u8868\uFF0C\u5B83\u4EEC\u5C31\u53EF\u4EE5\u5E76\u884C\u3002\u56E0\u4E3A\u6570\u636E\u662F\u5B58\u50A8\u5728\u8868\u91CC\u7684\uFF0C\u6240\u4EE5\u6309\u8868\u5206\u53D1\uFF0C\u53EF\u4EE5\u4FDD\u8BC1\u4E24\u4E2A worker \u4E0D\u4F1A\u66F4\u65B0\u540C\u4E00\u884C\u3002\u7F3A\u70B9\uFF1A\u5982\u679C\u78B0\u5230\u70ED\u70B9\u8868\uFF0C\u6BD4\u5982\u6240\u6709\u7684\u66F4\u65B0\u4E8B\u52A1\u90FD\u4F1A\u6D89\u53CA\u5230\u67D0\u4E00\u4E2A\u8868\u7684\u65F6\u5019\uFF0C\u6240\u6709\u4E8B\u52A1\u90FD\u4F1A\u88AB\u5206\u914D\u5230\u540C\u4E00\u4E2A worker \u4E2D\uFF0C\u5C31\u53D8\u6210\u5355\u7EBF\u7A0B\u590D\u5236\u4E86\u3002</li><li>\u6309\u884C\u5206\u53D1\u7B56\u7565\uFF1A\u5982\u679C\u4E24\u4E2A\u4E8B\u52A1\u6CA1\u6709\u66F4\u65B0\u76F8\u540C\u7684\u884C\uFF0C\u5B83\u4EEC\u5728\u5907\u5E93\u4E0A\u53EF\u4EE5\u5E76\u884C\u3002\u5982\u679C\u4E24\u4E2A\u4E8B\u52A1\u6CA1\u6709\u66F4\u65B0\u76F8\u540C\u7684\u884C\uFF0C\u5B83\u4EEC\u5728\u5907\u5E93\u4E0A\u53EF\u4EE5\u5E76\u884C\u6267\u884C\u3002\u663E\u7136\uFF0C\u8FD9\u4E2A\u6A21\u5F0F\u8981\u6C42 binlog \u683C\u5F0F\u5FC5\u987B\u662F row\u3002\u7F3A\u70B9\uFF1A\u76F8\u6BD4\u4E8E\u6309\u8868\u5E76\u884C\u5206\u53D1\u7B56\u7565\uFF0C\u6309\u884C\u5E76\u884C\u7B56\u7565\u5728\u51B3\u5B9A\u7EBF\u7A0B\u5206\u53D1\u7684\u65F6\u5019\uFF0C\u9700\u8981\u6D88\u8017\u66F4\u591A\u7684\u8BA1\u7B97\u8D44\u6E90\u3002</li></ul><h3 id="_41\u3001mysql\u7684\u4E00\u4E3B\u4E00\u5907\u548C\u4E00\u4E3B\u591A\u4ECE\u6709\u4EC0\u4E48\u533A\u522B" tabindex="-1"><a class="header-anchor" href="#_41\u3001mysql\u7684\u4E00\u4E3B\u4E00\u5907\u548C\u4E00\u4E3B\u591A\u4ECE\u6709\u4EC0\u4E48\u533A\u522B" aria-hidden="true">#</a> 41\u3001MySQL\u7684\u4E00\u4E3B\u4E00\u5907\u548C\u4E00\u4E3B\u591A\u4ECE\u6709\u4EC0\u4E48\u533A\u522B\uFF1F</h3><p>\u5728\u4E00\u4E3B\u4E00\u5907\u7684\u53CC M \u67B6\u6784\u91CC\uFF0C\u4E3B\u5907\u5207\u6362\u53EA\u9700\u8981\u628A\u5BA2\u6237\u7AEF\u6D41\u91CF\u5207\u5230\u5907\u5E93\uFF1B\u800C\u5728\u4E00\u4E3B\u591A\u4ECE\u67B6\u6784\u91CC\uFF0C\u4E3B\u5907\u5207\u6362\u9664\u4E86\u8981\u628A\u5BA2\u6237\u7AEF\u6D41\u91CF\u5207\u5230\u5907\u5E93\u5916\uFF0C\u8FD8\u9700\u8981\u628A\u4ECE\u5E93\u63A5\u5230\u65B0\u4E3B\u5E93\u4E0A\u3002</p><h3 id="_42\u3001\u4E3B\u5E93\u51FA\u95EE\u9898\u5982\u4F55\u89E3\u51B3" tabindex="-1"><a class="header-anchor" href="#_42\u3001\u4E3B\u5E93\u51FA\u95EE\u9898\u5982\u4F55\u89E3\u51B3" aria-hidden="true">#</a> 42\u3001\u4E3B\u5E93\u51FA\u95EE\u9898\u5982\u4F55\u89E3\u51B3?</h3><ul><li>\u57FA\u4E8E\u4F4D\u70B9\u7684\u4E3B\u5907\u5207\u6362\uFF1A\u5B58\u5728\u627E\u540C\u6B65\u4F4D\u70B9\u8FD9\u4E2A\u95EE\u9898</li><li>MySQL 5.6 \u7248\u672C\u5F15\u5165\u4E86 GTID\uFF0C\u5F7B\u5E95\u89E3\u51B3\u4E86\u8FD9\u4E2A\u56F0\u96BE\u3002\u90A3\u4E48\uFF0CGTID \u5230\u5E95\u662F\u4EC0\u4E48\u610F\u601D\uFF0C\u53C8\u662F\u5982\u4F55\u89E3\u51B3\u627E\u540C\u6B65\u4F4D\u70B9\u8FD9\u4E2A\u95EE\u9898\u5462\uFF1F</li><li>GTID\uFF1A\u5168\u5C40\u4E8B\u52A1 ID\uFF0C\u662F\u4E00\u4E2A\u4E8B\u52A1\u5728\u63D0\u4EA4\u7684\u65F6\u5019\u751F\u6210\u7684\uFF0C\u662F\u8FD9\u4E2A\u4E8B\u52A1\u7684\u552F\u4E00\u6807\u8BC6\uFF1B\u5B83\u7531\u4E24\u90E8\u5206\u7EC4\u6210\uFF0C\u683C\u5F0F\u662F\uFF1AGTID=server_uuid:gno</li><li>\u6BCF\u4E2A MySQL \u5B9E\u4F8B\u90FD\u7EF4\u62A4\u4E86\u4E00\u4E2A GTID \u96C6\u5408\uFF0C\u7528\u6765\u5BF9\u5E94\u201C\u8FD9\u4E2A\u5B9E\u4F8B\u6267\u884C\u8FC7\u7684\u6240\u6709\u4E8B\u52A1\u201D\u3002</li><li>\u5728\u57FA\u4E8E GTID \u7684\u4E3B\u5907\u5173\u7CFB\u91CC\uFF0C\u7CFB\u7EDF\u8BA4\u4E3A\u53EA\u8981\u5EFA\u7ACB\u4E3B\u5907\u5173\u7CFB\uFF0C\u5C31\u5FC5\u987B\u4FDD\u8BC1\u4E3B\u5E93\u53D1\u7ED9\u5907\u5E93\u7684\u65E5\u5FD7\u662F\u5B8C\u6574\u7684\u3002\u56E0\u6B64\uFF0C\u5982\u679C\u5B9E\u4F8B B \u9700\u8981\u7684\u65E5\u5FD7\u5DF2\u7ECF\u4E0D\u5B58\u5728\uFF0CA\u2019\u5C31\u62D2\u7EDD\u628A\u65E5\u5FD7\u53D1\u7ED9 B\u3002</li></ul><h3 id="_43\u3001mysql-\u8BFB\u5199\u5206\u79BB\u6D89\u53CA\u5230\u8FC7\u671F\u8BFB\u95EE\u9898\u7684\u51E0\u79CD\u89E3\u51B3\u65B9\u6848" tabindex="-1"><a class="header-anchor" href="#_43\u3001mysql-\u8BFB\u5199\u5206\u79BB\u6D89\u53CA\u5230\u8FC7\u671F\u8BFB\u95EE\u9898\u7684\u51E0\u79CD\u89E3\u51B3\u65B9\u6848" aria-hidden="true">#</a> 43\u3001MySQL \u8BFB\u5199\u5206\u79BB\u6D89\u53CA\u5230\u8FC7\u671F\u8BFB\u95EE\u9898\u7684\u51E0\u79CD\u89E3\u51B3\u65B9\u6848?</h3><ul><li>\u5F3A\u5236\u8D70\u4E3B\u5E93\u65B9\u6848</li><li>sleep \u65B9\u6848</li><li>\u5224\u65AD\u4E3B\u5907\u65E0\u5EF6\u8FDF\u65B9\u6848</li><li>\u914D\u5408 semi-sync \u65B9\u6848</li><li>\u7B49\u4E3B\u5E93\u4F4D\u70B9\u65B9\u6848</li><li>GTID \u65B9\u6848\u3002</li><li>\u5B9E\u9645\u751F\u4EA7\u4E2D\uFF0C\u5148\u5BA2\u6237\u7AEF\u5BF9\u8BF7\u6C42\u505A\u5206\u7C7B\uFF0C\u533A\u5206\u54EA\u4E9B\u8BF7\u6C42\u53EF\u4EE5\u63A5\u53D7\u8FC7\u671F\u8BFB\uFF0C\u800C\u54EA\u4E9B\u8BF7\u6C42\u5B8C\u5168\u4E0D\u80FD\u63A5\u53D7\u8FC7\u671F\u8BFB\uFF1B\u7136\u540E\uFF0C\u5BF9\u4E8E\u4E0D\u80FD\u63A5\u53D7\u8FC7\u671F\u8BFB\u7684\u8BED\u53E5\uFF0C\u518D\u4F7F\u7528\u7B49 GTID \u6216\u7B49\u4F4D\u70B9\u7684\u65B9\u6848\u3002</li></ul><h3 id="_44\u3001mysql\u7684\u5E76\u53D1\u94FE\u63A5\u548C\u5E76\u53D1\u67E5\u8BE2\u6709\u4EC0\u4E48\u533A\u522B" tabindex="-1"><a class="header-anchor" href="#_44\u3001mysql\u7684\u5E76\u53D1\u94FE\u63A5\u548C\u5E76\u53D1\u67E5\u8BE2\u6709\u4EC0\u4E48\u533A\u522B" aria-hidden="true">#</a> 44\u3001MySQL\u7684\u5E76\u53D1\u94FE\u63A5\u548C\u5E76\u53D1\u67E5\u8BE2\u6709\u4EC0\u4E48\u533A\u522B\uFF1F</h3><ul><li>\u5728\u6267\u884Cshow processlist\u7684\u7ED3\u679C\u91CC\uFF0C\u770B\u5230\u4E86\u51E0\u5343\u4E2A\u8FDE\u63A5\uFF0C\u6307\u7684\u662F\u5E76\u53D1\u8FDE\u63A5\u3002\u800C&quot;\u5F53\u524D\u6B63\u5728\u6267\u884C&quot;\u7684\u8BED\u53E5\uFF0C\u624D\u662F\u5E76\u53D1\u67E5\u8BE2\u3002</li><li>\u5E76\u53D1\u8FDE\u63A5\u6570\u591A\u5F71\u54CD\u7684\u662F\u5185\u5B58\uFF0C\u5E76\u53D1\u67E5\u8BE2\u592A\u9AD8\u5BF9CPU\u4E0D\u5229\u3002\u4E00\u4E2A\u673A\u5668\u7684CPU\u6838\u6570\u6709\u9650\uFF0C\u7EBF\u7A0B\u5168\u51B2\u8FDB\u6765\uFF0C\u4E0A\u4E0B\u6587\u5207\u6362\u7684\u6210\u672C\u5C31\u4F1A\u592A\u9AD8\u3002</li><li>\u6240\u4EE5\u9700\u8981\u8BBE\u7F6E\u53C2\u6570\uFF1Ainnodb_thread_concurrency \u7528\u6765\u9650\u5236\u7EBF\u7A0B\u6570\uFF0C\u5F53\u7EBF\u7A0B\u6570\u8FBE\u5230\u8BE5\u53C2\u6570\uFF0CInnoDB\u5C31\u4F1A\u8BA4\u4E3A\u7EBF\u7A0B\u6570\u7528\u5B8C\u4E86\uFF0C\u4F1A\u963B\u6B62\u5176\u4ED6\u8BED\u53E5\u8FDB\u5165\u5F15\u64CE\u6267\u884C\u3002</li></ul><h2 id="\u6027\u80FD\u76F8\u5173" tabindex="-1"><a class="header-anchor" href="#\u6027\u80FD\u76F8\u5173" aria-hidden="true">#</a> \u6027\u80FD\u76F8\u5173</h2><h3 id="_45\u3001\u77ED\u65F6\u95F4\u63D0\u9AD8-mysql-\u6027\u80FD\u7684\u65B9\u6CD5" tabindex="-1"><a class="header-anchor" href="#_45\u3001\u77ED\u65F6\u95F4\u63D0\u9AD8-mysql-\u6027\u80FD\u7684\u65B9\u6CD5" aria-hidden="true">#</a> 45\u3001\u77ED\u65F6\u95F4\u63D0\u9AD8 MySQL \u6027\u80FD\u7684\u65B9\u6CD5</h3><ul><li>\u7B2C\u4E00\u79CD\u65B9\u6CD5\uFF1A\u5148\u5904\u7406\u6389\u90A3\u4E9B\u5360\u7740\u8FDE\u63A5\u4F46\u662F\u4E0D\u5DE5\u4F5C\u7684\u7EBF\u7A0B\u3002\u6216\u8005\u518D\u8003\u8651\u65AD\u5F00\u4E8B\u52A1\u5185\u7A7A\u95F2\u592A\u4E45\u7684\u8FDE\u63A5\u3002 kill connection + id</li><li>\u7B2C\u4E8C\u79CD\u65B9\u6CD5\uFF1A\u51CF\u5C11\u8FDE\u63A5\u8FC7\u7A0B\u7684\u6D88\u8017\uFF1A\u6162\u67E5\u8BE2\u6027\u80FD\u95EE\u9898\u5728 MySQL \u4E2D\uFF0C\u4F1A\u5F15\u53D1\u6027\u80FD\u95EE\u9898\u7684\u6162\u67E5\u8BE2\uFF0C\u5927\u4F53\u6709\u4EE5\u4E0B\u4E09\u79CD\u53EF\u80FD\uFF1A\u7D22\u5F15\u6CA1\u6709\u8BBE\u8BA1\u597D\uFF1BSQL \u8BED\u53E5\u6CA1\u5199\u597D\uFF1BMySQL \u9009\u9519\u4E86\u7D22\u5F15\uFF08force index\uFF09\u3002</li></ul><h3 id="_46\u3001\u4E3A\u4EC0\u4E48-mysql-\u81EA\u589E\u4E3B\u952E-id-\u4E0D\u8FDE\u7EED" tabindex="-1"><a class="header-anchor" href="#_46\u3001\u4E3A\u4EC0\u4E48-mysql-\u81EA\u589E\u4E3B\u952E-id-\u4E0D\u8FDE\u7EED" aria-hidden="true">#</a> 46\u3001\u4E3A\u4EC0\u4E48 MySQL \u81EA\u589E\u4E3B\u952E ID \u4E0D\u8FDE\u7EED\uFF1F</h3><ul><li><p>\u552F\u4E00\u952E\u51B2\u7A81</p></li><li><p>\u4E8B\u52A1\u56DE\u6EDA</p></li><li><p>\u81EA\u589E\u4E3B\u952E\u7684\u6279\u91CF\u7533\u8BF7</p></li><li><p>\u6DF1\u5C42\u6B21\u539F\u56E0\u662F\uFF1AMySQL \u4E0D\u5224\u65AD\u81EA\u589E\u4E3B\u952E\u662F\u5426\u5B58\u5728\uFF0C\u4ECE\u800C\u51CF\u5C11\u52A0\u9501\u7684\u65F6\u95F4\u8303\u56F4\u548C\u7C92\u5EA6\uFF0C\u8FD9\u6837\u80FD\u4FDD\u6301\u66F4\u9AD8\u7684\u6027\u80FD\uFF0C\u786E\u4FDD\u81EA\u589E\u4E3B\u952E\u4E0D\u80FD\u56DE\u9000\uFF0C\u6240\u4EE5\u624D\u6709\u81EA\u589E\u4E3B\u952E\u4E0D\u8FDE\u7EED\u3002</p></li><li><p>\u81EA\u589E\u4E3B\u952E\u600E\u4E48\u505A\u5230\u552F\u4E00\u6027\uFF1F\u81EA\u589E\u503C\u52A01\u6765\u901A\u8FC7\u81EA\u589E\u9501\u63A7\u5236\u5E76\u53D1</p></li></ul><h3 id="_47\u3001innodb-\u4E3A\u4EC0\u4E48\u8981\u7528\u81EA\u589E-id-\u4F5C\u4E3A\u4E3B\u952E" tabindex="-1"><a class="header-anchor" href="#_47\u3001innodb-\u4E3A\u4EC0\u4E48\u8981\u7528\u81EA\u589E-id-\u4F5C\u4E3A\u4E3B\u952E" aria-hidden="true">#</a> 47\u3001InnoDB \u4E3A\u4EC0\u4E48\u8981\u7528\u81EA\u589E ID \u4F5C\u4E3A\u4E3B\u952E\uFF1F</h3><ul><li><p>\u81EA\u589E\u4E3B\u952E\u7684\u63D2\u5165\u6A21\u5F0F\uFF0C\u7B26\u5408\u9012\u589E\u63D2\u5165\uFF0C\u6BCF\u6B21\u90FD\u662F\u8FFD\u52A0\u64CD\u4F5C\uFF0C\u4E0D\u6D89\u53CA\u632A\u52A8\u8BB0\u5F55\uFF0C\u4E5F\u4E0D\u4F1A\u89E6\u53D1\u53F6\u5B50\u8282\u70B9\u7684\u5206\u88C2\u3002</p></li><li><p>\u6BCF\u6B21\u63D2\u5165\u65B0\u7684\u8BB0\u5F55\u5C31\u4F1A\u987A\u5E8F\u6DFB\u52A0\u5230\u5F53\u524D\u7D22\u5F15\u8282\u70B9\u7684\u540E\u7EED\u4F4D\u7F6E\uFF0C\u5F53\u4E00\u9875\u5199\u6EE1\uFF0C\u5C31\u4F1A\u81EA\u52A8\u5F00\u8F9F\u4E00\u4E2A\u65B0\u7684\u9875\u3002</p></li><li><p>\u800C\u6709\u4E1A\u52A1\u903B\u8F91\u7684\u5B57\u6BB5\u505A\u4E3B\u952E\uFF0C\u4E0D\u5BB9\u6613\u4FDD\u8BC1\u6709\u5E8F\u63D2\u5165\uFF0C\u7531\u4E8E\u6BCF\u6B21\u63D2\u5165\u4E3B\u952E\u7684\u503C\u8FD1\u4F3C\u4E8E\u968F\u673A</p></li><li><p>\u56E0\u6B64\u6BCF\u6B21\u65B0\u7EAA\u5F55\u90FD\u8981\u88AB\u63D2\u5230\u73B0\u6709\u7D22\u5F15\u9875\u5F97\u4E2D\u95F4\u67D0\u4E2A\u4F4D\u7F6E\uFF0C \u9891\u7E41\u7684\u79FB\u52A8\u3001\u5206\u9875\u64CD\u4F5C\u9020\u6210\u4E86\u5927\u91CF\u7684\u788E\u7247\uFF0C\u5F97\u5230\u4E86\u4E0D\u591F\u7D27\u51D1\u7684\u7D22\u5F15\u7ED3\u6784\uFF0C\u5199\u6570\u636E\u6210\u672C\u8F83\u9AD8\u3002</p></li></ul><h3 id="_48\u3001\u5982\u4F55\u6700\u5FEB\u7684\u590D\u5236\u4E00\u5F20\u8868" tabindex="-1"><a class="header-anchor" href="#_48\u3001\u5982\u4F55\u6700\u5FEB\u7684\u590D\u5236\u4E00\u5F20\u8868" aria-hidden="true">#</a> 48\u3001\u5982\u4F55\u6700\u5FEB\u7684\u590D\u5236\u4E00\u5F20\u8868\uFF1F</h3><ul><li>\u4E3A\u4E86\u907F\u514D\u5BF9\u6E90\u8868\u52A0\u8BFB\u9501\uFF0C\u66F4\u7A33\u59A5\u7684\u65B9\u6848\u662F\u5148\u5C06\u6570\u636E\u5199\u5230\u5916\u90E8\u6587\u672C\u6587\u4EF6\uFF0C\u7136\u540E\u518D\u5199\u56DE\u76EE\u6807\u8868</li><li>\u4E00\u79CD\u65B9\u6CD5\u662F\uFF0C\u4F7F\u7528 mysqldump \u547D\u4EE4\u5C06\u6570\u636E\u5BFC\u51FA\u6210\u4E00\u7EC4 INSERT \u8BED\u53E5</li><li>\u53E6\u4E00\u79CD\u65B9\u6CD5\u662F\u76F4\u63A5\u5C06\u7ED3\u679C\u5BFC\u51FA\u6210.csv \u6587\u4EF6\u3002MySQL \u63D0\u4F9B\u8BED\u6CD5\uFF0C\u7528\u6765\u5C06\u67E5\u8BE2\u7ED3\u679C\u5BFC\u51FA\u5230\u670D\u52A1\u7AEF\u672C\u5730\u76EE\u5F55\uFF1A<code>select * from db1.t where a&gt;900 into outfile &#39;/server_tmp/t.csv&#39;</code>;\u5F97\u5230.csv \u5BFC\u51FA\u6587\u4EF6\u540E\uFF0C\u4F60\u5C31\u53EF\u4EE5\u7528\u4E0B\u9762\u7684 load data \u547D\u4EE4\u5C06\u6570\u636E\u5BFC\u5165\u5230\u76EE\u6807\u8868 db2.t \u4E2D\uFF1A<code>load data infile &#39;/server_tmp/t.csv&#39; into table db2.t;</code></li><li>\u7269\u7406\u62F7\u8D1D\uFF1A\u5728 MySQL 5.6 \u7248\u672C\u5F15\u5165\u4E86\u53EF\u4F20\u8F93\u8868\u7A7A\u95F4(transportable tablespace) \u7684\u65B9\u6CD5\uFF0C\u53EF\u4EE5\u901A\u8FC7\u5BFC\u51FA + \u5BFC\u5165\u8868\u7A7A\u95F4\u7684\u65B9\u5F0F\uFF0C\u5B9E\u73B0\u7269\u7406\u62F7\u8D1D\u8868\u7684\u529F\u80FD\u3002</li></ul><h3 id="_49\u3001grant-\u548C-flush-privileges\u8BED\u53E5" tabindex="-1"><a class="header-anchor" href="#_49\u3001grant-\u548C-flush-privileges\u8BED\u53E5" aria-hidden="true">#</a> 49\u3001grant \u548C flush privileges\u8BED\u53E5</h3><ul><li>grant\u8BED\u53E5\u4F1A\u540C\u65F6\u4FEE\u6539\u6570\u636E\u8868\u548C\u5185\u5B58\uFF0C\u5224\u65AD\u6743\u9650\u7684\u65F6\u5019\u4F7F\u7528\u7684\u5185\u5B58\u6570\u636E\uFF0C\u56E0\u6B64\uFF0C\u89C4\u8303\u4F7F\u7528\u662F\u4E0D\u9700\u8981\u52A0\u4E0A flush privileges \u8BED\u53E5\u3002</li><li>flush privileges \u8BED\u53E5\u672C\u8EAB\u4F1A\u7528\u6570\u636E\u8868\u7684\u6570\u636E\u91CD\u5EFA\u4E00\u4EFD\u5185\u5B58\u6743\u9650\u6570\u636E\uFF0C\u6240\u4EE5\u5728\u6743\u9650\u6570\u636E\u53EF\u80FD\u5B58\u5728\u4E0D\u4E00\u81F4\u7684\u60C5\u51B5\u4E0B\u518D\u4F7F\u7528\u3002</li></ul><h3 id="_50\u3001\u8981\u4E0D\u8981\u4F7F\u7528\u5206\u533A\u8868" tabindex="-1"><a class="header-anchor" href="#_50\u3001\u8981\u4E0D\u8981\u4F7F\u7528\u5206\u533A\u8868" aria-hidden="true">#</a> 50\u3001\u8981\u4E0D\u8981\u4F7F\u7528\u5206\u533A\u8868\uFF1F</h3><ul><li>\u5206\u533A\u5E76\u4E0D\u662F\u8D8A\u7EC6\u8D8A\u597D\u3002\u5B9E\u9645\u4E0A\uFF0C\u5355\u8868\u6216\u8005\u5355\u5206\u533A\u7684\u6570\u636E\u4E00\u5343\u4E07\u884C\uFF0C\u53EA\u8981\u6CA1\u6709\u7279\u522B\u5927\u7684\u7D22\u5F15\uFF0C\u5BF9\u4E8E\u73B0\u5728\u7684\u786C\u4EF6\u80FD\u529B\u6765\u8BF4\u90FD\u5DF2\u7ECF\u662F\u5C0F\u8868\u4E86\u3002</li><li>\u5206\u533A\u4E5F\u4E0D\u8981\u63D0\u524D\u9884\u7559\u592A\u591A\uFF0C\u5728\u4F7F\u7528\u4E4B\u524D\u9884\u5148\u521B\u5EFA\u5373\u53EF\u3002\u6BD4\u5982\uFF0C\u5982\u679C\u662F\u6309\u6708\u5206\u533A\uFF0C\u6BCF\u5E74\u5E74\u5E95\u65F6\u518D\u628A\u4E0B\u4E00\u5E74\u5EA6\u7684 12 \u4E2A\u65B0\u5206\u533A\u521B\u5EFA\u4E0A\u5373\u53EF\u3002\u5BF9\u4E8E\u6CA1\u6709\u6570\u636E\u7684\u5386\u53F2\u5206\u533A\uFF0C\u8981\u53CA\u65F6\u7684 drop \u6389\u3002</li></ul><h3 id="_51\u3001join-\u7528\u6CD5" tabindex="-1"><a class="header-anchor" href="#_51\u3001join-\u7528\u6CD5" aria-hidden="true">#</a> 51\u3001join \u7528\u6CD5</h3><ul><li>\u4F7F\u7528 left join \u5DE6\u8FB9\u7684\u8868\u4E0D\u4E00\u5B9A\u662F\u9A71\u52A8\u8868</li><li>\u5982\u679C\u9700\u8981 left join \u7684\u8BED\u4E49\uFF0C\u5C31\u4E0D\u80FD\u628A\u88AB\u9A71\u52A8\u8868\u7684\u5B57\u6BB5\u653E\u5728 where \u6761\u4EF6\u91CC\u9762\u505A\u7B49\u503C\u5224\u65AD\u6216\u4E0D\u7B49\u503C\u5224\u65AD\uFF0C\u5FC5\u987B\u90FD\u5199\u5728 on \u91CC\u9762</li><li>\u6807\u51C6\u7684 group by \u8BED\u53E5\uFF0C\u662F\u9700\u8981\u5728 select \u90E8\u5206\u52A0\u4E00\u4E2A\u805A\u5408\u51FD\u6570\uFF0C\u6BD4\u5982<code>select a,count(*) from t group by a order by null;</code></li></ul><h3 id="_52\u3001mysql-\u6709\u54EA\u4E9B\u81EA\u589Eid-\u5404\u81EA\u573A\u666F\u662F\u4EC0\u4E48" tabindex="-1"><a class="header-anchor" href="#_52\u3001mysql-\u6709\u54EA\u4E9B\u81EA\u589Eid-\u5404\u81EA\u573A\u666F\u662F\u4EC0\u4E48" aria-hidden="true">#</a> 52\u3001MySQL \u6709\u54EA\u4E9B\u81EA\u589EID\uFF1F\u5404\u81EA\u573A\u666F\u662F\u4EC0\u4E48\uFF1F</h3><ul><li><p>\u8868\u7684\u81EA\u589E ID \u8FBE\u5230\u4E0A\u9650\u4E4B\u540E\uFF0C\u5728\u7533\u8BF7\u503C\u4E0D\u4F1A\u53D8\u5316\uFF0C\u8FDB\u800C\u5BFC\u81F4\u8054\u7CFB\u63D2\u5165\u6570\u636E\u7684\u65F6\u5019\u62A5\u4E3B\u952E\u51B2\u7A81\u9519\u8BEF\u3002</p></li><li><p>row_id \u8FBE\u5230\u4E0A\u9650\u4E4B\u540E\uFF0C\u5F52 0 \u5728\u91CD\u65B0\u9012\u589E\uFF0C\u5982\u679C\u51FA\u73B0\u76F8\u540C\u7684 row_id \u540E\u5199\u7684\u6570\u636E\u4F1A\u8986\u76D6\u4E4B\u524D\u7684\u6570\u636E\u3002</p></li><li><p>Xid \u53EA\u9700\u8981\u4E0D\u5728\u540C\u4E00\u4E2A binlog \u6587\u4EF6\u51FA\u73B0\u91CD\u590D\u503C\u5373\u53EF\uFF0C\u7406\u8BBA\u4E0A\u4F1A\u51FA\u73B0\u91CD\u590D\u503C\uFF0C\u4F46\u6982\u7387\u6781\u5C0F\u53EF\u5FFD\u7565\u4E0D\u8BA1\u3002</p></li><li><p>InnoDB \u7684 max_trx_id \u9012\u589E\u503C\u6BCF\u6B21 MySQL \u91CD\u542F\u4F1A\u4FDD\u5B58\u8D77\u6765\u3002</p></li><li><p>Xid \u662F\u7531 server \u5C42\u7EF4\u62A4\u7684\u3002InnoDB \u5185\u90E8\u4F7F\u7528 Xid\uFF0C\u5C31\u662F\u4E3A\u4E86\u80FD\u591F\u5728 InnoDB \u4E8B\u52A1\u548C server \u4E4B\u95F4\u505A\u5173\u8054\u3002\u4F46\u662F\uFF0CInnoDB \u81EA\u5DF1\u7684 trx_id\uFF0C\u662F\u53E6\u5916\u7EF4\u62A4\u7684\u3002</p></li><li><p>thread_id \u662F\u6211\u4EEC\u4F7F\u7528\u4E2D\u6700\u5E38\u89C1\u7684\uFF0C\u800C\u4E14\u4E5F\u662F\u5904\u7406\u5F97\u6700\u597D\u7684\u4E00\u4E2A\u81EA\u589E id \u903B\u8F91\u4E86\u3002\u4F7F\u7528\u4E86insert_unique\u7B97\u6CD5</p></li></ul><h3 id="_53\u3001xid-\u5728-mysql-\u5185\u90E8\u662F\u600E\u4E48\u751F\u6210\u7684\u5462" tabindex="-1"><a class="header-anchor" href="#_53\u3001xid-\u5728-mysql-\u5185\u90E8\u662F\u600E\u4E48\u751F\u6210\u7684\u5462" aria-hidden="true">#</a> 53\u3001Xid \u5728 MySQL \u5185\u90E8\u662F\u600E\u4E48\u751F\u6210\u7684\u5462\uFF1F</h3><p><strong>MySQL \u5185\u90E8\u7EF4\u62A4\u4E86\u4E00\u4E2A\u5168\u5C40\u53D8\u91CF global_query_id\uFF0C\u6BCF\u6B21\u6267\u884C\u8BED\u53E5\uFF08\u5305\u62ECselect\u8BED\u53E5\uFF09\u7684\u65F6\u5019\u5C06\u5B83\u8D4B\u503C\u7ED9 Query_id\uFF0C\u7136\u540E\u7ED9\u8FD9\u4E2A\u53D8\u91CF\u52A0 1\u3002\u5982\u679C\u5F53\u524D\u8BED\u53E5\u662F\u8FD9\u4E2A\u4E8B\u52A1\u6267\u884C\u7684\u7B2C\u4E00\u6761\u8BED\u53E5\uFF0C\u90A3\u4E48 MySQL \u8FD8\u4F1A\u540C\u65F6\u628A Query_id \u8D4B\u503C\u7ED9\u8FD9\u4E2A\u4E8B\u52A1\u7684 Xid\u3002</strong></p><p>\u800C global_query_id \u662F\u4E00\u4E2A\u7EAF\u5185\u5B58\u53D8\u91CF\uFF0C\u91CD\u542F\u4E4B\u540E\u5C31\u6E05\u96F6\u4E86\u3002\u6240\u4EE5\u4F60\u5C31\u77E5\u9053\u4E86\uFF0C\u5728\u540C\u4E00\u4E2A\u6570\u636E\u5E93\u5B9E\u4F8B\u4E2D\uFF0C\u4E0D\u540C\u4E8B\u52A1\u7684 Xid \u4E5F\u662F\u6709\u53EF\u80FD\u76F8\u540C\u7684\u3002\u4F46\u662F MySQL \u91CD\u542F\u4E4B\u540E\u4F1A\u91CD\u65B0\u751F\u6210\u65B0\u7684 binlog \u6587\u4EF6\uFF0C\u8FD9\u5C31\u4FDD\u8BC1\u4E86\uFF0C\u540C\u4E00\u4E2A binlog \u6587\u4EF6\u91CC\uFF0CXid \u4E00\u5B9A\u662F\u60DF\u4E00\u7684\u3002</p><h2 id="\u9501\u76F8\u5173" tabindex="-1"><a class="header-anchor" href="#\u9501\u76F8\u5173" aria-hidden="true">#</a> \u9501\u76F8\u5173</h2><h3 id="_54\u3001\u8BF4\u4E00\u4E0B-mysql-\u7684\u9501" tabindex="-1"><a class="header-anchor" href="#_54\u3001\u8BF4\u4E00\u4E0B-mysql-\u7684\u9501" aria-hidden="true">#</a> 54\u3001\u8BF4\u4E00\u4E0B MySQL \u7684\u9501</h3><ul><li>MySQL \u5728 server \u5C42 \u548C \u5B58\u50A8\u5F15\u64CE\u5C42 \u90FD\u8FD0\u7528\u4E86\u5927\u91CF\u7684\u9501</li><li>MySQL server \u5C42\u9700\u8981\u8BB2\u4E24\u79CD\u9501\uFF0C\u7B2C\u4E00\u79CD\u662FMDL(metadata lock) \u5143\u6570\u636E\u9501\uFF0C\u7B2C\u4E8C\u79CD\u5219 Table Lock \u8868\u9501\u3002</li><li>MDL \u53C8\u540D\u5143\u6570\u636E\u9501\uFF0C\u90A3\u4E48\u4EC0\u4E48\u662F\u5143\u6570\u636E\u5462\uFF0C\u4EFB\u4F55\u63CF\u8FF0\u6570\u636E\u5E93\u7684\u5185\u5BB9\u5C31\u662F\u5143\u6570\u636E\uFF0C\u6BD4\u5982\u6211\u4EEC\u7684\u8868\u7ED3\u6784\u3001\u5E93\u7ED3\u6784\u7B49\u90FD\u662F\u5143\u6570\u636E\u3002\u90A3\u4E3A\u4EC0\u4E48\u9700\u8981 MDL \u5462\uFF1F</li><li>\u4E3B\u8981\u89E3\u51B3\u4E24\u4E2A\u95EE\u9898\uFF1A\u4E8B\u52A1\u9694\u79BB\u95EE\u9898\uFF1B\u6570\u636E\u590D\u5236\u95EE\u9898</li><li>InnoDB \u6709\u4E94\u79CD\u8868\u7EA7\u9501\uFF1AIS\uFF08\u610F\u5411\u8BFB\u9501\uFF09\uFF1BIX\uFF08\u610F\u5411\u5199\u9501\uFF09\uFF1BS\uFF08\u8BFB\uFF09\uFF1BX\uFF08\u5199\uFF09\uFF1BAUTO-INC</li><li>\u5728\u5BF9\u8868\u8FDB\u884Cselect/insert/delete/update\u8BED\u53E5\u65F6\u5019\u4E0D\u4F1A\u52A0\u8868\u7EA7\u9501</li><li>IS\u548CIX\u7684\u4F5C\u7528\u662F\u4E3A\u4E86\u5224\u65AD\u8868\u4E2D\u662F\u5426\u6709\u5DF2\u7ECF\u88AB\u52A0\u9501\u7684\u8BB0\u5F55</li><li>\u81EA\u589E\u4E3B\u952E\u7684\u4FDD\u969C\u5C31\u662F\u6709 AUTO-INC \u9501\uFF0C\u662F\u8BED\u53E5\u7EA7\u522B\u7684\uFF1A\u4E3A\u8868\u7684\u67D0\u4E2A\u5217\u6DFB\u52A0 AUTO_INCREMENT \u5C5E\u6027\uFF0C\u4E4B\u540E\u5728\u63D2\u2F0A\u8BB0\u5F55\u65F6\uFF0C\u53EF\u4EE5\u4E0D\u6307\u5B9A\u8BE5\u5217\u7684\u503C\uFF0C\u7CFB\u7EDF\u4F1A\u2F83\u52A8\u4E3A\u5B83\u8D4B\u4E0A\u5355\u8C03\u9012\u589E\u7684\u503C\u3002</li><li>InnoDB 4 \u79CD\u884C\u7EA7\u9501</li><li>RecordLock\uFF1A\u8BB0\u5F55\u9501</li><li>GapLock\uFF1A\u95F4\u9699\u9501\u89E3\u51B3\u5E7B\u8BFB\uFF1B\u524D\u4E00\u6B21\u67E5\u8BE2\u4E0D\u5B58\u5728\u7684\u4E1C\u897F\u5728\u4E0B\u4E00\u6B21\u67E5\u8BE2\u51FA\u73B0\u4E86\uFF0C\u5176\u5B9E\u5C31\u662F\u4E8B\u52A1A\u4E2D\u7684\u4E24\u6B21\u67E5\u8BE2\u4E4B\u95F4\u4E8B\u52A1B\u6267\u884C\u63D2\u5165\u64CD\u4F5C\u88AB\u4E8B\u52A1A\u611F\u77E5\u4E86</li><li>Next-KeyLock\uFF1A\u9501\u4F4F\u67D0\u6761\u8BB0\u5F55\u53C8\u60F3\u963B\u6B62\u5176\u5B83\u4E8B\u52A1\u5728\u6539\u8BB0\u5F55\u524D\u9762\u7684\u95F4\u9699\u63D2\u5165\u65B0\u7EAA\u5F55</li><li>InsertIntentionLock\uFF1A\u63D2\u5165\u610F\u5411\u9501;\u5982\u679C\u63D2\u5165\u5230\u540C\u4E00\u884C\u95F4\u9699\u4E2D\u7684\u591A\u4E2A\u4E8B\u52A1\u672A\u63D2\u5165\u5230\u95F4\u9699\u5185\u7684\u540C\u4E00\u4F4D\u7F6E\u5219\u65E0\u987B\u7B49\u5F85</li><li>\u884C\u9501\u548C\u8868\u9501\u7684\u6289\u62E9 <ul><li>\u5168\u8868\u626B\u63CF\u7528\u884C\u7EA7\u9501</li></ul></li></ul><h3 id="_55\u3001\u4EC0\u4E48\u662F\u5E7B\u8BFB" tabindex="-1"><a class="header-anchor" href="#_55\u3001\u4EC0\u4E48\u662F\u5E7B\u8BFB" aria-hidden="true">#</a> 55\u3001\u4EC0\u4E48\u662F\u5E7B\u8BFB\uFF1F</h3><p>\u503C\u5728\u540C\u4E00\u4E2A\u4E8B\u52A1\u4E2D\uFF0C\u5B58\u5728\u524D\u540E\u4E24\u6B21\u67E5\u8BE2\u540C\u4E00\u4E2A\u8303\u56F4\u7684\u6570\u636E\uFF0C\u7B2C\u4E8C\u6B21\u770B\u5230\u4E86\u7B2C\u4E00\u6B21\u6CA1\u6709\u67E5\u8BE2\u5230\u7684\u6570\u636E\u3002</p><p>\u5E7B\u8BFB\u51FA\u73B0\u7684\u573A\u666F\uFF1A</p><ul><li>\u4E8B\u52A1\u7684\u9694\u79BB\u7EA7\u522B\u662F\u53EF\u91CD\u590D\u8BFB\uFF0C\u4E14\u662F\u5F53\u524D\u8BFB\u3002</li><li>\u5E7B\u8BFB\u6307\u65B0\u63D2\u5165\u7684\u884C\u3002</li></ul><p>\u5E7B\u8BFB\u5E26\u6765\u7684\u95EE\u9898\uFF1A</p><ul><li>\u5BF9\u884C\u9501\u8BED\u4E49\u7684\u7834\u574F</li><li>\u7834\u574F\u4E86\u6570\u636E\u4E00\u81F4\u6027</li></ul><p>\u89E3\u51B3\uFF1A</p><ul><li>\u52A0\u95F4\u9699\u9501\uFF0C\u9501\u4F4F\u884C\u4E0E\u884C\u4E4B\u95F4\u7684\u95F4\u9699\uFF0C\u963B\u585E\u65B0\u63D2\u5165\u7684\u64CD\u4F5C\u3002</li><li>\u5E26\u6765\u7684\u95EE\u9898\uFF1A\u964D\u4F4E\u5E76\u53D1\u5EA6\uFF0C\u53EF\u80FD\u5BFC\u81F4\u6B7B\u9501\u3002</li></ul><h2 id="\u5176\u5B83\u4E3A\u4EC0\u4E48\u7CFB\u5217" tabindex="-1"><a class="header-anchor" href="#\u5176\u5B83\u4E3A\u4EC0\u4E48\u7CFB\u5217" aria-hidden="true">#</a> \u5176\u5B83\u4E3A\u4EC0\u4E48\u7CFB\u5217</h2><h3 id="_56\u3001\u4E3A\u4EC0\u4E48-mysql-\u4F1A\u6296\u4E00\u4E0B" tabindex="-1"><a class="header-anchor" href="#_56\u3001\u4E3A\u4EC0\u4E48-mysql-\u4F1A\u6296\u4E00\u4E0B" aria-hidden="true">#</a> 56\u3001\u4E3A\u4EC0\u4E48 MySQL \u4F1A\u6296\u4E00\u4E0B\uFF1F</h3><ul><li>\u810F\u9875\u4F1A\u88AB\u540E\u53F0\u7EBF\u7A0B\u81EA\u52A8 flush\uFF0C\u4E5F\u4F1A\u7531\u4E8E\u6570\u636E\u9875\u6DD8\u6C70\u800C\u89E6\u53D1 flush\uFF0C\u800C\u5237\u810F\u9875\u7684\u8FC7\u7A0B\u7531\u4E8E\u4F1A\u5360\u7528\u8D44\u6E90\uFF0C\u53EF\u80FD\u4F1A\u8BA9\u4F60\u7684\u66F4\u65B0\u548C\u67E5\u8BE2\u8BED\u53E5\u7684\u54CD\u5E94\u65F6\u95F4\u957F\u4E00\u4E9B\u3002</li></ul><h3 id="_57\u3001\u4E3A\u4EC0\u4E48\u5220\u9664\u4E86\u8868-\u8868\u6587\u4EF6\u7684\u5927\u5C0F\u8FD8\u662F\u6CA1\u53D8" tabindex="-1"><a class="header-anchor" href="#_57\u3001\u4E3A\u4EC0\u4E48\u5220\u9664\u4E86\u8868-\u8868\u6587\u4EF6\u7684\u5927\u5C0F\u8FD8\u662F\u6CA1\u53D8" aria-hidden="true">#</a> 57\u3001\u4E3A\u4EC0\u4E48\u5220\u9664\u4E86\u8868\uFF0C\u8868\u6587\u4EF6\u7684\u5927\u5C0F\u8FD8\u662F\u6CA1\u53D8\uFF1F</h3><ul><li>\u6570\u636E\u9879\u5220\u9664\u4E4B\u540E InnoDB \u67D0\u4E2A\u9875 page A \u4F1A\u88AB\u6807\u8BB0\u4E3A\u53EF\u590D\u7528\u3002</li><li>delete \u547D\u4EE4\u628A\u6574\u4E2A\u8868\u7684\u6570\u636E\u5220\u9664\uFF0C\u7ED3\u679C\u5C31\u662F\uFF0C\u6240\u6709\u7684\u6570\u636E\u9875\u90FD\u4F1A\u88AB\u6807\u8BB0\u4E3A\u53EF\u590D\u7528\u3002\u4F46\u662F\u78C1\u76D8\u4E0A\uFF0C\u6587\u4EF6\u4E0D\u4F1A\u53D8\u5C0F\u3002</li><li>\u7ECF\u8FC7\u5927\u91CF\u589E\u5220\u6539\u7684\u8868\uFF0C\u90FD\u662F\u53EF\u80FD\u662F\u5B58\u5728\u7A7A\u6D1E\u7684\u3002\u8FD9\u4E9B\u7A7A\u6D1E\u4E5F\u5360\u7A7A\u95F4\u6240\u4EE5\uFF0C\u5982\u679C\u80FD\u591F\u628A\u8FD9\u4E9B\u7A7A\u6D1E\u53BB\u6389\uFF0C\u5C31\u80FD\u8FBE\u5230\u6536\u7F29\u8868\u7A7A\u95F4\u7684\u76EE\u7684\u3002</li><li>\u91CD\u5EFA\u8868\uFF0C\u5C31\u53EF\u4EE5\u8FBE\u5230\u8FD9\u6837\u7684\u76EE\u7684\u3002\u53EF\u4EE5\u4F7F\u7528 alter table A engine=InnoDB \u547D\u4EE4\u6765\u91CD\u5EFA\u8868\u3002</li></ul><h3 id="_58\u3001count-\u5B9E\u73B0\u65B9\u5F0F\u4EE5\u53CA\u5404\u79CD-count-\u5BF9\u6BD4" tabindex="-1"><a class="header-anchor" href="#_58\u3001count-\u5B9E\u73B0\u65B9\u5F0F\u4EE5\u53CA\u5404\u79CD-count-\u5BF9\u6BD4" aria-hidden="true">#</a> 58\u3001<code>count(*)</code>\u5B9E\u73B0\u65B9\u5F0F\u4EE5\u53CA\u5404\u79CD count \u5BF9\u6BD4</h3><ul><li>\u5BF9\u4E8E count(\u4E3B\u952E id) \u6765\u8BF4\uFF0CInnoDB \u5F15\u64CE\u4F1A\u904D\u5386\u6574\u5F20\u8868\uFF0C\u628A\u6BCF\u4E00\u884C\u7684 id \u503C\u90FD\u53D6\u51FA\u6765\uFF0C\u8FD4\u56DE\u7ED9 server \u5C42\u3002server \u5C42\u62FF\u5230 id \u540E\uFF0C\u5224\u65AD\u662F\u4E0D\u53EF\u80FD\u4E3A\u7A7A\u7684\uFF0C\u5C31\u6309\u884C\u7D2F\u52A0\u3002</li><li>\u5BF9\u4E8E count(1) \u6765\u8BF4\uFF0CInnoDB \u5F15\u64CE\u904D\u5386\u6574\u5F20\u8868\uFF0C\u4F46\u4E0D\u53D6\u503C\u3002server \u5C42\u5BF9\u4E8E\u8FD4\u56DE\u7684\u6BCF\u4E00\u884C\uFF0C\u653E\u4E00\u4E2A\u6570\u5B57\u201C1\u201D\u8FDB\u53BB\uFF0C\u5224\u65AD\u662F\u4E0D\u53EF\u80FD\u4E3A\u7A7A\u7684\uFF0C\u6309\u884C\u7D2F\u52A0\u3002 \u5355\u770B\u8FD9\u4E24\u4E2A\u7528\u6CD5\u7684\u5DEE\u522B\u7684\u8BDD\uFF0C\u4F60\u80FD\u5BF9\u6BD4\u51FA\u6765\uFF0Ccount(1) \u6267\u884C\u5F97\u8981\u6BD4 count(\u4E3B\u952E id) \u5FEB\u3002\u56E0\u4E3A\u4ECE\u5F15\u64CE\u8FD4\u56DE id \u4F1A\u6D89\u53CA\u5230\u89E3\u6790\u6570\u636E\u884C\uFF0C\u4EE5\u53CA\u62F7\u8D1D\u5B57\u6BB5\u503C\u7684\u64CD\u4F5C\u3002</li><li>\u5BF9\u4E8E count(\u5B57\u6BB5) \u6765\u8BF4\uFF1A\u5982\u679C\u8FD9\u4E2A\u201C\u5B57\u6BB5\u201D\u662F\u5B9A\u4E49\u4E3A not null \u7684\u8BDD\uFF0C\u4E00\u884C\u884C\u5730\u4ECE\u8BB0\u5F55\u91CC\u9762\u8BFB\u51FA\u8FD9\u4E2A\u5B57\u6BB5\uFF0C\u5224\u65AD\u4E0D\u80FD\u4E3A null\uFF0C\u6309\u884C\u7D2F\u52A0\uFF1B\u5982\u679C\u8FD9\u4E2A\u201C\u5B57\u6BB5\u201D\u5B9A\u4E49\u5141\u8BB8\u4E3A null\uFF0C\u90A3\u4E48\u6267\u884C\u7684\u65F6\u5019\uFF0C\u5224\u65AD\u5230\u6709\u53EF\u80FD\u662F null\uFF0C\u8FD8\u8981\u628A\u503C\u53D6\u51FA\u6765\u518D\u5224\u65AD\u4E00\u4E0B\uFF0C\u4E0D\u662F null \u624D\u7D2F\u52A0\u3002\u4E5F\u5C31\u662F\u524D\u9762\u7684\u7B2C\u4E00\u6761\u539F\u5219\uFF0Cserver \u5C42\u8981\u4EC0\u4E48\u5B57\u6BB5\uFF0CInnoDB \u5C31\u8FD4\u56DE\u4EC0\u4E48\u5B57\u6BB5\u3002</li><li>\u4F46\u662F <code>count *</code> \u662F\u4F8B\u5916\uFF0C\u5E76\u4E0D\u4F1A\u628A\u5168\u90E8\u5B57\u6BB5\u53D6\u51FA\u6765\uFF0C\u800C\u662F\u4E13\u95E8\u505A\u4E86\u4F18\u5316\uFF0C\u4E0D\u53D6\u503C\u3002<code>count(*)</code>\u80AF\u5B9A\u4E0D\u662F null\uFF0C\u6309\u884C\u7D2F\u52A0\u3002</li><li>\u6240\u4EE5\u7ED3\u8BBA\u662F\uFF1A\u6309\u7167\u6548\u7387\u6392\u5E8F\u7684\u8BDD\uFF0Ccount(\u5B57\u6BB5)<code>&lt;count(\u4E3B\u952E id)&lt;count(1)\u2248count(\u203B)</code>\uFF0C\u6240\u4EE5\u5EFA\u8BAE\u5C3D\u91CF\u4F7F\u7528 <code>count(*)</code>\u3002</li></ul><h3 id="_59\u3001orderby-\u6392\u5E8F\u5185\u90E8\u539F\u7406" tabindex="-1"><a class="header-anchor" href="#_59\u3001orderby-\u6392\u5E8F\u5185\u90E8\u539F\u7406" aria-hidden="true">#</a> 59\u3001orderby \u6392\u5E8F\u5185\u90E8\u539F\u7406</h3><ul><li><p>MySQL \u4F1A\u4E3A\u6BCF\u4E2A\u7EBF\u7A0B\u5206\u914D\u4E00\u4E2A\u5185\u5B58\uFF08sort-buffer\uFF09\u7528\u4E8E\u6392\u5E8F\u8BE5\u5185\u5B58\u5927\u5C0F\u4E3A sort_buffer_size\uFF1B</p></li><li><p>\u5982\u679C\u6392\u5E8F\u7684\u6570\u636E\u91CF\u5C0F\u4E8E sort_buffer_size\uFF0C\u6392\u5E8F\u5C31\u4F1A\u5728\u5185\u5B58\u4E2D\u5B8C\u6210\uFF1B</p><p>\u5185\u90E8\u6392\u5E8F\u5206\u4E3A\u4E24\u79CD</p></li><li><p>\u5168\u5B57\u6BB5\u6392\u5E8F\uFF1A\u5230\u7D22\u5F15\u6811\u4E0A\u627E\u5230\u6EE1\u8DB3\u6761\u4EF6\u7684\u4E3B\u952EID\u6839\u636E\u4E3B\u952EID\u53BB\u53D6\u51FA\u6570\u636E\u653E\u5230sort_buffer\u7136\u540E\u8FDB\u884C\u5FEB\u901F\u6392\u5E8F</p></li><li><p>rowid\u6392\u5E8F\uFF1A\u901A\u8FC7\u63A7\u5236\u6392\u5E8F\u7684\u884C\u6570\u636E\u7684\u957F\u5EA6\u6765\u8BA9sort_buffer\u4E2D\u5C3D\u53EF\u80FD\u591A\u7684\u5B58\u653E\u6570\u636E</p></li><li><p>\u5982\u679C\u6570\u636E\u91CF\u5F88\u5927\uFF0C\u5185\u5B58\u4E2D\u65E0\u6CD5\u5B58\u4E0B\u8FD9\u4E48\u591A\uFF0C\u5C31\u4F1A\u4F7F\u7528\u78C1\u76D8\u4E34\u65F6\u6587\u4EF6\u6765\u8F85\u52A9\u6392\u5E8F\uFF0C\u79F0\u4E3A\u5916\u90E8\u6392\u5E8F\uFF1B</p></li><li><p>\u5916\u90E8\u6392\u5E8F\uFF0CMySQL\u4F1A\u5206\u4E3A\u597D\u51E0\u4EFD\u5355\u72EC\u7684\u4E34\u65F6\u6587\u4EF6\u6765\u5B58\u653E\u6392\u5E8F\u540E\u7684\u6570\u636E\uFF0C\u4E00\u822C\u662F\u78C1\u76D8\u6587\u4EF6\u4E2D\u8FDB\u884C\u5F52\u5E76\uFF0C\u7136\u540E\u5C06\u8FD9\u4E9B\u6587\u4EF6\u5408\u5E76\u6210\u4E00\u4E2A\u5927\u6587\u4EF6\uFF1B</p></li></ul><h3 id="_60\u3001\u5982\u4F55\u9AD8\u6548\u7684\u4F7F\u7528-mysql-\u663E\u5F0F\u968F\u673A\u6D88\u606F" tabindex="-1"><a class="header-anchor" href="#_60\u3001\u5982\u4F55\u9AD8\u6548\u7684\u4F7F\u7528-mysql-\u663E\u5F0F\u968F\u673A\u6D88\u606F" aria-hidden="true">#</a> 60\u3001\u5982\u4F55\u9AD8\u6548\u7684\u4F7F\u7528 MySQL \u663E\u5F0F\u968F\u673A\u6D88\u606F</h3><ul><li><p>\u968F\u673A\u53D6\u51FA Y1,Y2,Y3\u4E4B\u540E\uFF0C\u7B97\u51FAYmax,Ymin</p></li><li><p>\u5F97\u5230id\u96C6\u540E\u7B97\u51FAY1\u3001Y2\u3001Y3\u5BF9\u5E94\u7684\u4E09\u4E2Aid \u6700\u540E select * from t where id in (id1, id2, id3) \u8FD9\u6837\u626B\u63CF\u7684\u884C\u6570\u5E94\u8BE5\u662FC+Ymax+3</p></li></ul><div class="language-mysql ext-mysql line-numbers-mode"><pre class="language-mysql"><code>  mysql&gt; select count(*) into @C from t;
   set @Y1 = floor(@C * rand());
   set @Y2 = floor(@C * rand());
diff --git a/dist/assets/nanjing.html.0381e4b6.js b/dist/assets/nanjing.html.0381e4b6.js
deleted file mode 100644
index 103c5c33..00000000
--- a/dist/assets/nanjing.html.0381e4b6.js
+++ /dev/null
@@ -1 +0,0 @@
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diff --git a/dist/assets/nanjing.html.099e9844.js b/dist/assets/nanjing.html.099e9844.js
new file mode 100644
index 00000000..1d5cbdc6
--- /dev/null
+++ b/dist/assets/nanjing.html.099e9844.js
@@ -0,0 +1 @@
+import{_ as c}from"./plugin-vue_export-helper.21dcd24c.js";import{r as i,o as d,c as p,a as e,b as r,e as n,d as a}from"./app.615e41d8.js";const h={},o=n('<h1 id="\u5357\u4EAC\u90FD\u6709\u54EA\u4E9B\u503C\u5F97\u52A0\u5165\u7684it\u4E92\u8054\u7F51\u516C\u53F8" tabindex="-1"><a class="header-anchor" href="#\u5357\u4EAC\u90FD\u6709\u54EA\u4E9B\u503C\u5F97\u52A0\u5165\u7684it\u4E92\u8054\u7F51\u516C\u53F8" aria-hidden="true">#</a> \u5357\u4EAC\u90FD\u6709\u54EA\u4E9B\u503C\u5F97\u52A0\u5165\u7684IT\u4E92\u8054\u7F51\u516C\u53F8\uFF1F</h1><p>\u5927\u5BB6\u597D\u5440\uFF0C\u6211\u662F\u4E8C\u54E5\u3002\u88AB\u8BFB\u8005\u50AC\u4E86\u597D\u4E45\uFF0C\u5927\u767D\u7EC8\u4E8E\u628A\u5357\u4EAC\u7684\u4E92\u8054\u7F51\u516C\u53F8\u8C03\u7814\u5B8C\u6BD5\u4E86\uFF0C\u4ECA\u5929\u5C31\u8D76\u7D27\u7ED9\u5927\u5BB6\u5206\u4EAB\u4E00\u6CE2\u3002\u5357\u4EAC\u662F\u5F88\u6709\u5438\u5F15\u529B\u7684\u4E00\u5EA7\u57CE\u5E02\uFF0C 20 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src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-707d074e-def7-4cd3-af0a-84e46a0929a9.png" alt=""></p><p>\u63D0\u4E00\u4E0B\u54C8\uFF0C\u5728\u8FD9\u4E2A\u7CFB\u5217\u91CC\u8BF4\u7684\u6821\u62DB\u85AA\u8D44\u90FD\u662F\u5E38\u89C4\u62DB\u8058\u8BA1\u5212\u7684\u85AA\u8D44\uFF0C\u8BF4\u7684\u5E38\u89C4\u62DB\u8058\u8BA1\u5212\u7ED9\u51FA\u7684 offer \u5305\u542B\u666E\u901A offer\uFF0Csp (special offer) \u548C ssp\u3002\u4E0D\u5305\u542B\u90A3\u4E9B\u6BD4\u5982\u534E\u4E3A\u5929\u624D\u5C11\u5E74\u3001\u7F8E\u56E2\u5317\u6597\u4E4B\u7C7B\u7684\u3002\u90A3\u79CD\u795E\u4ED9 offer 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\u4E2A\u5DE6\u53F3\u3002",-1),m=e("h3",{id:"\u5B57\u8282\u8DF3\u52A8",tabindex:"-1"},[e("a",{class:"header-anchor",href:"#\u5B57\u8282\u8DF3\u52A8","aria-hidden":"true"},"#"),a(" \u5B57\u8282\u8DF3\u52A8")],-1),j=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-f945934a-3ab8-4272-a8b2-7001ea396377.png",alt:""})],-1),v=a("\u6821\u62DB\u85AA\u8D44\uFF1A\u5B57\u8282\u5728\u5357\u4EAC\u7684\u85AA\u8D44\u662F\u5B57\u8282\u5728\u5317\u4EAC\u4E0A\u6D77\u6DF1\u5733\u85AA\u8D44\u7684 0.9\u3002\u611F\u89C9\u85AA\u8D44\u6C34\u5E73\u633A\u4E0D\u9519\u4E86\u3002\u4ECA\u5E74\u5B57\u8282\u6821\u62DB\u85AA\u8D44\u4E5F\u53EF\u4EE5\u70B9\u8FD9\u4E2A"),_={href:"https://mp.weixin.qq.com/s/3c-a7GpkTzAU2DFWSwN4lw",target:"_blank",rel:"noopener noreferrer"},k=a("\u94FE\u63A5"),u=a("\u67E5\u770B\u3002"),x=n('<p>\u4E2A\u4EBA\u8BC4\u4EF7\uFF1A\u5357\u4EAC\u8FD9\u8FB9\u5B57\u8282\u7684\u90E8\u95E8\u8FD8\u662F\u633A\u591A\u7684\uFF0C\u6E38\u620F\u4E2D\u53F0\u3001\u5BA2\u6237\u7AEF\u3001\u6570\u636E\u5E73\u53F0\u3001\u5E7F\u544A\u7B97\u6CD5\u8FD9\u4E9B\u56E2\u961F\u90FD\u5728\u62DB\u4EBA\u3002\u56E2\u961F\u4E5F\u4E0D\u80FD\u7B97\u8FB9\u7F18\uFF0C\u5728\u5357\u4EAC\u5B57\u8282\u5DE5\u4F5C\u7684\u8BDD\u8FD8\u662F\u633A\u4E0D\u9519\u7684\u3002</p><h3 id="\u8363\u8000" tabindex="-1"><a class="header-anchor" href="#\u8363\u8000" aria-hidden="true">#</a> \u8363\u8000</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-8470d707-53c6-4c07-8160-50759ad9d50b.png" alt=""></p><p>\u6821\u62DB\u85AA\u8D44\uFF1A\u6708\u85AA 17k - 27k\uFF08\u5BF9\u5E9413-15\u7EA7\uFF09\uFF0C\u6BCF\u5E74 14-16 \u85AA\u3002</p><p>\u4E2A\u4EBA\u8BC4\u4EF7\uFF1A\u5BF9\u4E8E\u4E0D\u592A\u5173\u6CE8\u65B0\u95FB\u7684\u5B66\u751F\u8363\u8000\u53EF\u80FD\u4E0D\u592A\u719F\u6089\uFF0C\u4ECA\u5929\u5C55\u5F00\u4ECB\u7ECD\u4E00\u4E0B\uFF0C\u4F60\u4F1A\u53D1\u73B0\u63A5\u4E0B\u6765\u8FDE\u7740\u51E0\u5BB6\u90FD\u662F\u5356\u624B\u673A\u505A\u901A\u8BAF\u7684\u3002\u534E\u4E3A\u4E4B\u524D\u6709\u8363\u8000\u624B\u673A\u7684\u4E1A\u52A1\u7EBF\uFF0C\u8363\u8000\u624B\u673A\u4E00\u76F4\u8D70\u4EF7\u683C\u8F83\u4F4E\u7684\u5927\u4F17\u5316\u8DEF\u7EBF\uFF0C\u540E\u6765\u56E0\u4E3A\u7F8E\u56FD\u5236\u88C1\uFF0C\u6240\u4EE5\u8363\u8000\u88AB\u62C6\u4E86\u51FA\u6765\u3002\u76EE\u524D\u8363\u8000\u5927\u90E8\u5206\u4EBA\u5458\u90FD\u662F\u534E\u4E3A\u8FC7\u6765\u7684\uFF0C\u6700\u8FD1\u4E5F\u5728\u5927\u91CF\u62DB\u4EBA\u3002\u6240\u4EE5\u8363\u8000\u76EE\u524D\u53EF\u4EE5\u770B\u4F5C\u4E00\u4E2A\u7FFB\u7248\u534E\u4E3A\uFF0C\u5404\u65B9\u9762\u90FD\u662F\u5728\u5B66\u534E\u4E3A\uFF0C\u4F46\u662F\u540E\u671F\u80FD\u4E0D\u80FD\u5B66\u7684\u50CF\u5C31\u53E6\u8BF4\u4E86\u3002</p><p>\u8363\u8000\u548C\u534E\u4E3A\u6821\u62DB\u9762\u8BD5\u65F6\u65B9\u6CD5\u4E00\u6837\uFF0C\u6839\u636E\u4F60\u9762\u8BD5\u7684\u8868\u73B0\u7ED9\u4F60\u5B9A\u7EA7\uFF0C\u7136\u540E\u901A\u8FC7\u6240\u5B9A\u7684\u7EA7\u522B\u6765\u548C\u4F60\u8C08\u85AA\u3002\u5927\u90E8\u5206\u672C\u79D1\u751F\u662F13\u7EA7\uFF0C\u9762\u8BD5\u8868\u73B0\u5F88\u597D\u7684\u8BDD\u53EF\u80FD\u4F1A\u5B9A\u5230 14 \u7EA7\u3002\u7814\u7A76\u751F\u5927\u90E8\u5206\u662F 14\u7EA7\uFF0C\u4E00\u4E9B\u9762\u8BD5\u8868\u73B0\u4E00\u822C\u7684\u53EF\u80FD\u4E5F\u4F1A\u5B9A\u523013\u7EA7\u300215\u7EA7\u57FA\u672C\u4E0A\u9700\u8981\u8BFB\u4E66\u671F\u95F4\u53D1\u8FC7\u6709\u542B\u91D1\u91CF\u7684\u8BBA\u6587\u6216\u8005\u53C2\u4E0E\u8FC7\u91CD\u5927\u5F00\u6E90\u9879\u76EE\u3002\u5357\u4EAC\u8363\u8000\u5DE5\u4F5C\u5236\u5EA6\u57FA\u672C\u4E0A\u5C31\u662F 996\u3002</p><h3 id="\u534E\u4E3A" tabindex="-1"><a class="header-anchor" href="#\u534E\u4E3A" aria-hidden="true">#</a> \u534E\u4E3A</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-f8ba1f60-c3bc-450b-b833-54db9bfdb807.png" alt=""></p><p>\u6821\u62DB\u85AA\u8D44\uFF1A13\u7EA7\u6708\u85AA 20-21k\uFF0C14 \u7EA7 23-25k\uFF0C15\u7EA7\u6708\u85AA 26-27k\u3002\u6BCF\u5E74 14-16 \u85AA\u300216\u7EA7\u6211\u5C31\u4E0D\u6E05\u695A\u4E86\u3002</p><p>\u4E2A\u4EBA\u8BC4\u4EF7\uFF1A\u611F\u89C9\u534E\u4E3A\u4ECA\u5E74\u6821\u62DB\u85AA\u8D44\u6C34\u5E73\u63D0\u5347\u4E86\u4E0D\u5C11\uFF0C\u6211\u6821\u62DB\u90A3\u5E74\u62A0\u7684\u8981\u6B7B\uFF0C14a \u624D\u80FD\u7ED9\u5230 19k\u3002\u8981\u662F\u4ECA\u5E74\u8FD9\u85AA\u8D44\u6C34\u5E73\u6211\u5F88\u53EF\u80FD\u5C31\u7559\u5230\u897F\u5B89\u534E\u4E3A\u4E86\uFF0C\u4E5F\u5C31\u4E0D\u5317\u6F02\u4E86\u3002\u4E0D\u8FC7\u534E\u4E3A\u53EA\u7ED9 5% \u7684\u516C\u79EF\u91D1\u662F\u6709\u70B9\u4F4E\u3002\u611F\u89C9\u534E\u4E3A\u60F3\u8981\u8BC4\u523015\u7EA7\u4EE5\u4E0A\u662F\u9700\u8981\u4F60\u5728\u8BFB\u4E66\u671F\u95F4\u6709\u4E00\u4E9B\u80FD\u8BC1\u660E\u4F60\u80FD\u529B\u7684\u4E1C\u897F\uFF0C\u6BD4\u5982\u6BD4\u8F83\u6709\u542B\u91D1\u91CF\u7684\u8BBA\u6587\uFF0C\u6216\u8005\u53C2\u4E0E\u8FC7\u91CD\u5927\u7684\u9879\u76EE\u3002\u5982\u679C\u624B\u91CC\u6CA1\u542B\u91D1\u91CF\u7684\u4E1C\u897F\uFF0C\u9760\u9762\u8BD5\u8868\u73B0\u6765\u8BF4\u6700\u591A\u4E5F\u5C31\u662F\u7ED9\u523014\u7EA7\u4E86\u3002\uFF08\u53CD\u6B63\u6211\u9762\u8BD5\u90A3\u5E74\u662F\u8FD9\u6837\uFF09\u3002\u534E\u4E3A\u5BF9\u4E8E\u90E8\u5206\u7279\u522B\u725B\u903C\u7684\u7855\u58EB\u4F1A\u7ED9\u5230 16\u7EA7\u3002\u5357\u4EAC\u534E\u4E3A\u5728\u51E0\u4E2A\u7814\u53D1\u4E2D\u5FC3\u7B97\u662F\u52A0\u73ED\u6BD4\u8F83\u5C11\u7684\uFF0C\u53EA\u662F\u76F8\u5BF9\u554A.</p><h3 id="\u5C0F\u7C73" tabindex="-1"><a class="header-anchor" href="#\u5C0F\u7C73" aria-hidden="true">#</a> \u5C0F\u7C73</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-bfb9cd80-f9b5-4ea7-b4f6-a15e54cf3c4b.png" alt=""></p><p>\u6821\u62DB\u85AA\u8D44\uFF1A\u5C0F\u7C73\u7684\u85AA\u8D44\u662F\u633A\u62A0\uFF0C\u4E0D\u8FC7\u653E\u5728\u5357\u4EAC\u6765\u770B\u4E5F\u8FD8\u884C\u3002\u770B\u6821\u62DB\u85AA\u6C34\u4E0A\u5357\u4EAC\u7684\u85AA\u8D44\u7206\u6599\u4ECA\u5E74\u6709 11k\uFF0C14k\uFF0C16k\uFF0C18k\uFF0C19k\uFF0C21k\uFF0C23k \u51E0\u4E2A\u6863\u300211k\uFF0C14k\u57FA\u672C\u90FD\u662F\u672C\u79D1\u751F\uFF0C\u7855\u58EB\u505A\u5F00\u53D1\u5C97\u7684\u5927\u90E8\u5206\u662F16k\uFF0C18k\uFF0C19k\u8FD9\u51E0\u4E2A\u6863\u300220k \u4EE5\u4E0A\u7684\u57FA\u672C\u90FD\u662F\u505A\u7B97\u6CD5\u7684\u3002</p><p>\u4E2A\u4EBA\u8BC4\u4EF7\uFF1A\u5357\u4EAC\u7684\u5C0F\u7C73\u7B97\u662F\u4E00\u4E2A\u6BD4\u8F83\u5927\u7684\u7814\u53D1\u4E2D\u5FC3\uFF0C\u6709\u4E9B\u5C0F\u7C73\u6BD4\u8F83\u6838\u5FC3\u7684\u90E8\u95E8\u3002\u5357\u4EAC\u5C0F\u7C73\u5927\u90E8\u5206\u7EC4\u5468\u672B\u53CC\u4F11\u662F\u80FD\u4FDD\u8BC1\u7684\uFF0C\u5468\u5185\u4E0A\u73ED\u5230\u51E0\u70B9\u5404\u7EC4\u60C5\u51B5\u4E0D\u4E00\u81F4\uFF0C\u603B\u4F53\u4E0A\u5C31\u662F 995 \u8FD9\u4E48\u4E2A\u60C5\u51B5\u3002</p><h3 id="vivo" tabindex="-1"><a class="header-anchor" href="#vivo" aria-hidden="true">#</a> Vivo</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-7d676f6f-b081-4eb7-a2ce-3590a04b2fcd.png" alt=""></p><p>\u6821\u62DB\u85AA\u8D44\uFF1A\u5357\u4EAC\u8FD9\u8FB9\u76EE\u524D\u770B\u5230\u7ED9\u5E94\u5C4A\u751F\u7684\u4EF7\u94B1\u5206\u4E3A\u6708\u85AA17k\uFF0C20k\uFF0C24k\u4E09\u4E2A\u6863\uFF0C\uFF0C\u6BCF\u5E7415\u85AA\u3002\u989D\u5916\u6BCF\u4E2A\u6708\u6709 1500 \u7684\u79DF\u623F\u8865\u8D34\u3002\u4F4F\u623F\u516C\u79EF\u91D15%\u3002</p><p>\u4E2A\u4EBA\u8BC4\u4EF7\uFF1A\u4E4B\u524D Vivo \u662F\u6709\u5927\u5C0F\u5468\u7684\uFF08\u5C31\u662F\u9694\u4E00\u5468\u4E00\u6B21\u5355\u4F11\uFF09\uFF0C\u53BB\u5E74\u4E5D\u6708\u4EFD\u7EDF\u4E00\u6210\u53CC\u4F11\u4E86\uFF0C\u5DE5\u4F5C\u5236\u5EA6\u5DEE\u4E0D\u591A 995 \u6216\u8005 9105 \u7684\u6837\u5B50\u3002\u5468\u5185\u5C31\u6CA1\u65F6\u95F4\u5E72\u522B\u7684\u4E8B\u4E86\uFF0C\u4E0D\u8FC7 Vivo \u8FD9\u4E2A\u85AA\u8D44\u5728\u5357\u4EAC\u786E\u5B9E\u7B97\u662F\u8FD8\u4E0D\u9519\u4E86\u3002</p><h3 id="oppo" tabindex="-1"><a class="header-anchor" href="#oppo" aria-hidden="true">#</a> OPPO</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-9ad6c7fe-c486-4628-8e07-f21b3e2cac6d.png" alt=""></p><p>\u6821\u62DB\u85AA\u8D44\uFF1A\u5177\u4F53\u85AA\u8D44\u4E0D\u592A\u6E05\u695A\uFF0C\u5927\u81F4\u5E94\u5C4A\u751F\u6708\u85AA\u5728 20k \u4E0A\u4E0B\uFF0C\u6BCF\u5E74 14 -15 \u4E2A\u6708\u85AA\u8D44\u3002</p><p>\u4E2A\u4EBA\u8BC4\u4EF7\uFF1AOPPO \u7684\u85AA\u8D44\u6CA1\u8C03\u67E5\u6E05\u695A\uFF0C\u4FE1\u606F\u6BD4\u8F83\u5C11\uFF0C\u4E0D\u8FC7\u5E94\u8BE5\u548C VIVO \u5DEE\u4E0D\u591A\u3002\u84DD\u7EFF\u4E24\u5382\u90FD\u662F\u4ECE\u6B65\u6B65\u9AD8\u62C6\u5206\u51FA\u6765\u7684\uFF0C\u4E24\u5144\u5F1F\u4ECE\u85AA\u8D44\u4E0A\u4EE5\u53CA\u5DE5\u4F5C\u6A21\u5F0F\u4E0A\u90FD\u5F88\u50CF\u3002OPPO \u548C VIVO \u5728\u5357\u4EAC\u90FD\u7B97\u662F\u4E0D\u9519\u7684\u9009\u62E9\u3002</p><h3 id="\u4E2D\u5174" tabindex="-1"><a class="header-anchor" href="#\u4E2D\u5174" aria-hidden="true">#</a> \u4E2D\u5174</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-094809df-30b0-40c6-a1a5-f1e0a5329b6a.png" alt=""></p><p>\u6821\u62DB\u85AA\u8D44\uFF1A\u4E2D\u5174\u5E38\u89C4\u8BA1\u5212\uFF08\u6307\u7684\u662F\u666E\u901A offer)\u7684\u6708\u85AA\u57FA\u672C\u90FD\u572820k \u4EE5\u5185\uFF0C\u84DD\u5251\u8BA1\u5212\u5E74\u85AA\u4F1A\u5728 40w \u4EE5\u4E0A\u3002</p><p>\u4E2A\u4EBA\u8BC4\u4EF7\uFF1A\u4E2D\u5174\u8FD9\u4E24\u5E74\u7684\u7ADE\u4E89\u529B\u4E00\u76F4\u5904\u5728\u4E00\u4E2A\u4E0B\u6ED1\u7684\u72B6\u6001\uFF0C\u611F\u89C9\u84DD\u5251\u8BA1\u5212\u8FD8\u4E0D\u9519\uFF0C\u4F46\u662F\u540D\u989D\u5F88\u5C11\uFF0C\u4E00\u4E2A\u90E8\u95E8\u53EA\u6709\u4E00\u4E24\u4E2A\u540D\u989D\u3002\u5F53\u65F6\u4E2D\u5174\u84DD\u5251\u8BA1\u5212\u6765\u6211\u4EEC\u5B66\u6821\u5BA3\u8BB2\u8FC7\uFF0C\u6211\u548C\u4E00\u4E2A\u90E8\u95E8\u7684 leader \u4E0B\u6765\u804A\u4E86\u4E0B\uFF0C\u770B\u4E86\u6211\u7684\u60C5\u51B5\u4EE5\u540E\u8BF4\u5E38\u89C4\u6279\u6B21\u7684\u6700\u9AD8\u7684 offer \u7ED9\u6211\u6CA1\u95EE\u9898\uFF0C\u4F46\u662F\u84DD\u5251\u4ED6\u4EEC\u76EE\u524D\u5907\u9009\u7684\u4E24\u4E2A\u4EBA\u624B\u4E0A\u90FD\u6709\u542B\u91D1\u91CF\u5F88\u9AD8\u7684\u8BBA\u6587\u548C\u9879\u76EE\uFF0C\u6211\u548C\u4EBA\u5BB6\u5DEE\u8DDD\u5F88\u660E\u663E\u3002\u4E2D\u5174\u5E38\u89C4\u62DB\u8058\u8BA1\u5212\u7684 offer \u548C\u5927\u90E8\u5206\u5927\u516C\u53F8\u5C31\u6CA1\u6CD5\u6BD4\u4E86\u3002</p><h3 id="_360" tabindex="-1"><a class="header-anchor" href="#_360" aria-hidden="true">#</a> 360</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-0bec3704-902d-4b8b-90b7-4ab5fc28a79d.png" alt=""></p><p>\u6821\u62DB\u85AA\u8D44\uFF1A\u6CA1\u8C03\u67E5\u6E05\u695A\uFF0C\u5E74\u85AA\u5DEE\u4E0D\u591A 23w \u5DE6\u53F3\u3002</p><p>\u4E2A\u4EBA\u8BC4\u4EF7\uFF1A\u5357\u4EAC360\u6709\u5EFA\u90BA\u533A\u548C\u4E5D\u9F99\u6E56\u4E24\u4E2A\u529E\u516C\u533A\uFF0C\u4E5D\u9F99\u6E56\u7684\u4E1A\u52A1\u6BD4\u8F83\u6838\u5FC3\u3002360 \u76EE\u524D\u5DE5\u4F5C\u751F\u6D3B\u6BD4\u8F83\u5E73\u8861\uFF0C\u5728\u4ECB\u7ECD\u5317\u4EAC\u65F6\u8BE6\u7EC6\u4ECB\u7ECD\u8FC7 360\uFF0C\u5927\u5BB6\u53EF\u4EE5\u70B9\u8FD9\u91CC\u8FDB\u53BB\u770B\u4E0B\uFF0C\u6765\u5317\u4EAC 360 \u6211\u8FD8\u662F\u6BD4\u8F83\u63A8\u8350\u7684\u3002\u5357\u4EAC 360 \u4E3B\u8981\u505A toB \u4E1A\u52A1\uFF0C\u76EE\u524D\u5357\u4EAC 360 \u7684\u72B6\u51B5\u4E0D\u592A\u597D\uFF0C\u8FD8\u4F20\u51FA\u8FC7\u5357\u4EAC\u4E1A\u52A1\u56E2\u961F\u4F1A\u88AB\u64A4\u6389\u7684\u4F20\u8A00\uFF08\u8FD9\u53EA\u662F\u4F20\u8A00\u554A\uFF0C\u771F\u5B9E\u6027\u4E0D\u662F\u5F88\u9AD8\uFF0C\u4F46\u662F\u4E5F\u53CD\u6620\u51FA 360 \u5357\u4EAC\u4E1A\u52A1\u60C5\u51B5\u4E0D\u592A\u597D\uFF09\u60F3\u8981\u53BB\u7684\u8BDD\u5927\u5BB6\u81EA\u5DF1\u4E00\u5B9A\u8981\u95EE\u6E05\u695A\u3002</p><h3 id="\u6DF1\u4FE1\u670D" tabindex="-1"><a class="header-anchor" href="#\u6DF1\u4FE1\u670D" aria-hidden="true">#</a> \u6DF1\u4FE1\u670D</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-5041109f-e9d8-4419-9f41-466f93708c53.png" alt=""></p><p>\u6821\u62DB\u85AA\u8D44\uFF1A\u5F00\u53D1\u5C97\u67093\u4E2A\u6863\uFF0C\u6708\u85AA\u5206\u5E03\u572815.6 - 22.8k \u8FD9\u4E2A\u533A\u95F4\uFF0C\u7B97\u6CD5\u5C97\u4E5F\u662F\u4E09\u4E2A\u6863\uFF0C\u6708\u85AA\u5206\u5E03\u572819 - 25.2k \u8FD9\u4E2A\u533A\u95F4\u3002\u6BCF\u5E7413 - 15 \u85AA</p><p>\u4E2A\u4EBA\u8BC4\u4EF7\uFF1A\u6DF1\u4FE1\u670D\u603B\u4F53\u6765\u8BF4\u52A0\u73ED\u633A\u4E25\u91CD\u7684\uFF0C\u4E0D\u8FC7\u5357\u4EAC\u7684\u6DF1\u4FE1\u670D\u76F8\u5BF9\u6DF1\u5733\u7A0D\u5FAE\u597D\u4E00\u70B9\u3002\u6BD4\u8F83\u597D\u7684\u5C31\u662F\u6DF1\u4FE1\u670D\u6280\u672F\u8FD8\u4E0D\u9519\uFF0C\u53E6\u5916\u4ED8\u51FA\u548C\u6536\u5165\u6210\u6B63\u6BD4\uFF0C\u5176\u5B9E\u5927\u90E8\u5206\u4EBA\u4E0D\u662F\u5403\u4E0D\u4E86\u82E6\uFF0C\u800C\u662F\u5DE5\u4F5C\u65F6\u4ED8\u51FA\u548C\u6536\u5165\u4E0D\u6210\u6B63\u6BD4\u3002</p><h3 id="\u8D8B\u52BF\u79D1\u6280" tabindex="-1"><a class="header-anchor" href="#\u8D8B\u52BF\u79D1\u6280" aria-hidden="true">#</a> \u8D8B\u52BF\u79D1\u6280</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-f60ae6ee-13d7-4efc-bd5a-a0334b76c6e3.png" alt=""></p><p>\u6821\u62DB\u85AA\u8D44\uFF1A\u770B\u5230\u6821\u62DB\u85AA\u8D44\u7206\u6599\u6709\u4E09\u4E2A\u6863\uFF0C\u5206\u522B\u662F\u5E74\u85AA 20w\uFF0C23.5w \u548C 25w\u3002</p><p>\u4E2A\u4EBA\u8BC4\u4EF7\uFF1A\u8D8B\u52BF\u79D1\u6280\u662F\u4E00\u5BB6\u5916\u4F01\uFF0C\u5728\u5357\u4EAC\u5F88\u591A\u5E74\u4E86\uFF0C\u5728\u5B89\u5168\u65B9\u9762\u505A\u7684\u4E0D\u9519\u3002\u53EF\u4EE5\u770B\u51FA\u6765\uFF0C\u8D8B\u52BF\u79D1\u6280\u7684\u5DE5\u8D44\u4E0D\u7B97\u9AD8\uFF08\u8FD9\u4E2A\u85AA\u8D44\u5728\u524D\u4E24\u5E74\u8FD8\u53EF\u4EE5\uFF0C\u4F46\u5728\u4ECA\u5E74\u5404\u5927\u5382\u6821\u62DB\u85AA\u8D44\u5927\u6DA8\u7684\u60C5\u51B5\u4E0B\u5C31\u4E0D\u592A\u591F\u770B\u4E86\uFF09\uFF0C\u5DE5\u8D44\u4F4E\u4F34\u968F\u7740\u516C\u53F8\u5F88\u591A\u6280\u672F\u5927\u795E\u6D41\u5931\u3002\u5E76\u4E14\u516C\u53F8\u572820\u5E74\u5E95\u6709\u6B21\u5927\u7684\u4EBA\u5458\u67B6\u6784\u8C03\u6574\uFF0C\u4E5F\u8D70\u4E86\u5F88\u591A\u4EBA\u3002\u76EE\u524D\u516C\u53F8\u53EA\u662F\u80DC\u5728\u5DE5\u4F5C\u8F7B\u677E\u52A0\u73ED\u5C11\u4E86\u3002</p><h3 id="\u4E9A\u4FE1\u5B89\u5168" tabindex="-1"><a class="header-anchor" href="#\u4E9A\u4FE1\u5B89\u5168" aria-hidden="true">#</a> \u4E9A\u4FE1\u5B89\u5168</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-97e8edd1-2a4d-492c-9039-febbae881c05.png" alt=""></p><p>\u6821\u62DB\u85AA\u8D44\uFF1A\u57FA\u672C\u4E0A\u6708\u85AA\u572815-18.5k \u8FD9\u4E2A\u533A\u95F4\uFF0C\u6BCF\u5E74 13- 15\u85AA\u3002</p><p>\u4E2A\u4EBA\u8BC4\u4EF7\uFF1A\u4E9A\u4FE1\u5B89\u5168\u4E3B\u8981\u505A\u8FD0\u8425\u5546\u7684\u9879\u76EE\u3002\u4E9A\u4FE1\u79D1\u6280\u77E5\u4E4E\u4E0A\u88AB\u55B7\u7684\u8FD8\u633A\u591A\u7684\uFF0C\u4E0D\u8FC7\u4E9A\u4FE1\u5B89\u5168\u76EE\u524D\u98CE\u8BC4\u8FD8\u53EF\u4EE5\uFF0C\u52A0\u73ED\u5C11\u4E9B\u3002</p><h3 id="shein" tabindex="-1"><a class="header-anchor" href="#shein" aria-hidden="true">#</a> SHEIN</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-fc7ddb5b-cbc1-482f-9087-ea9e3e136795.png" alt=""></p><p>\u6821\u62DB\u85AA\u8D44\uFF1A\u76EE\u524D\u770B\u6821\u62DB\u85AA\u8D44\u7206\u6599\u6708\u85AA\u57FA\u672C\u96C6\u4E2D\u572816-23k\uFF0C\u6709\u4E2A\u8BF4\u81EA\u5DF1 27k \u7684\u4E0D\u77E5\u9053\u771F\u7684\u5047\u7684\uFF08\u5982\u679C\u662F\u771F\u7684\uFF0C\u611F\u89C9 SHEIN \u5927\u90E8\u5206\u8001\u5458\u5DE5\u8981RUN\u4E86\uFF09\u3002\u6BCF\u5E7414\u85AA\u3002</p><p>\u4E2A\u4EBA\u8BC4\u4EF7\uFF1ASHEIN \u6211\u66FE\u7ECF\u8FD8\u62FF\u8FC7\u8FD9\u5BB6\u516C\u53F8\u7684 offer\u3002\u516C\u53F8\u505A\u8DE8\u5883\u7535\u5546\u7684\uFF0C\u4E3B\u8981\u5356\u5973\u88C5\u3002\u9762\u8BD5\u76F8\u5BF9\u5BB9\u6613\u4E00\u4E9B\uFF0C\u57FA\u672C\u5C31\u662F\u95EE\u4E9B\u5E38\u95EE\u7684\u516B\u80A1\u6587\uFF0C\u90FD\u6CA1\u8BA9\u6211\u624B\u6495\u4EE3\u7801\u3002SHEIN \u6280\u672F\u8FD8\u884C\uFF0C\u4E00\u4E9B\u62FF\u4E0D\u5230\u5927\u5382 offer \u7684\u540C\u5B66\uFF0C\u5148\u53BB\u8FD9\u91CC\u4E5F\u8FD8\u4E0D\u9519\u3002\u53E6\u5916\u5C31\u662F\u6211\u542C\u8BF4\u5357\u4EAC\u7684 SHEIN \u8D8A\u6765\u8D8A\u5377\u4E86\uFF0C\u4E0D\u662F\u66FE\u7ECF\u7684 965 \u4E86\u3002</p><h3 id="\u6EE1\u5E2E\u96C6\u56E2" tabindex="-1"><a class="header-anchor" href="#\u6EE1\u5E2E\u96C6\u56E2" aria-hidden="true">#</a> \u6EE1\u5E2E\u96C6\u56E2</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-ec98654b-0bcf-4e96-bb52-fe7ebd2a6c55.png" alt=""></p><p>\u6821\u62DB\u85AA\u8D44\uFF1A\u6821\u62DB\u85AA\u6C34\u4E0A\u7684\u7206\u6599\u5F00\u53D1\u6708\u85AA\u57FA\u672C\u90FD\u5728 20-30k \u8FD9\u4E2A\u533A\u95F4\uFF0C\u7B97\u6CD5\u57FA\u672C\u90FD\u5728 27-36k \u8FD9\u4E2A\u533A\u95F4\u3002\u5927\u90E8\u5206\u4EBA\u6BCF\u5E74 14 \u85AA\u3002</p><p>\u4E2A\u4EBA\u8BC4\u4EF7\uFF1A\u6EE1\u5E2E\u5C31\u662F\u5357\u4EAC\u7684\u672C\u571F\u4F01\u4E1A\uFF0C\u4E3B\u8981\u662F\u505A\u8D27\u8FD0\u4E1A\u52A1\u7684\u3002\u5357\u4EAC\u8FD9\u8FB9\u80FD\u7ED9\u51FA\u4E0A\u9762\u7684\u85AA\u8D44\uFF0C\u786E\u5B9E\u96BE\u5F97\uFF0C\u4E0D\u8FC7\u4ECE\u7ED9\u8FD9\u4E48\u591A\u94B1\u5C31\u80FD\u770B\u51FA\u6765\uFF0C\u52A0\u73ED\u80AF\u5B9A\u5C11\u4E0D\u4E86\u3002\u6EE1\u5E2E\u76EE\u524D\u62DB\u4EBA\u633A\u591A\u7684\u3002</p><h2 id="\u56FD\u4F01" tabindex="-1"><a class="header-anchor" href="#\u56FD\u4F01" aria-hidden="true">#</a> \u56FD\u4F01</h2><h3 id="\u4E2D\u7535\u7CFB\u5217" tabindex="-1"><a class="header-anchor" href="#\u4E2D\u7535\u7CFB\u5217" aria-hidden="true">#</a> \u4E2D\u7535\u7CFB\u5217</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-21fd091d-8afd-4cde-8fbd-a78b3c805085.png" alt=""></p><p>\u5357\u4EAC\u6709\u4E2D\u7535 28 \u6240\u3001\u4E2D\u7535 14 \u6240\u3001\u4E2D\u7535 841 \u6240\u3002\u6709\u4E00\u4E9B\u8BFB\u8005\u8DDF\u6211\u8BF4\u60F3\u53BB\u7814\u7A76\u6240\uFF0C\u60F3\u6CD5\u662F\u53BB\u7814\u7A76\u6240\u53EF\u4EE5\u5DE5\u4F5C\u751F\u6D3B\u5E73\u8861\u3002\u4F46\u662F\u73B0\u5728\u6709\u5F88\u591A\u7684\u7814\u7A76\u6240\u5176\u5B9E\u5F88\u5FD9\u7684\uFF0C\u5DE5\u4F5C\u751F\u6D3B\u5E73\u8861\u7684\u7814\u7A76\u6240\u5C24\u5176\u4E0D\u5305\u62EC\u5357\u4EAC\u8FD9\u51E0\u4E2A\u3002841 \u6240\u8FD8\u4E0D\u662F\u7279\u522B\u6E05\u695A\u3002\u5927\u90E8\u5206\u4E92\u8054\u7F51\u516C\u53F8\u548C\u4E2D\u7535 28 \u6240\u4EE5\u53CA 14 \u6240 \u6BD4\u8D77\u6765\u8FD8\u771F\u662F\u5F1F\u5F1F\uFF0C\u4E0D\u8FC7\u6839\u636E\u5357\u4EAC\u7684\u85AA\u8D44\u7684\u6C34\u5E73\u6765\u8BF4\uFF0C\u8FD9\u4E24\u4E2A\u6240\u5F97\u798F\u5229\u5F85\u9047\u7B97\u662F\u9876\u7EA7\u4E86\u3002\u521A\u6BD5\u4E1A\u7684\u5E94\u5C4A\u751F\u8FDB\u53BB\u5DE5\u8D44\u5927\u6982\u6BCF\u6708\u5230\u624B\u662F\u4E00\u4E07\u51FA\u5934\u5427\uFF0C\u6709\u98DF\u5802\u6709\u5BBF\u820D\uFF0C\u51FA\u5DEE\u4F1A\u6709\u51FA\u5DEE\u8865\u8D34\uFF0C\u5DEE\u4E0D\u591A\u4E00\u5929\u4E09\u56DB\u767E\uFF0C\u8FD9\u51E0\u4E2A\u6240\u51FA\u5DEE\u4F1A\u975E\u5E38\u7684\u591A\u3002</p><h3 id="\u5357\u745E\u96C6\u56E2-\u56FD\u7F51\u7535\u79D1\u9662" tabindex="-1"><a class="header-anchor" href="#\u5357\u745E\u96C6\u56E2-\u56FD\u7F51\u7535\u79D1\u9662" aria-hidden="true">#</a> \u5357\u745E\u96C6\u56E2\uFF08\u56FD\u7F51\u7535\u79D1\u9662\uFF09</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-aff2d53a-95b6-4654-baac-ebc2ba39fc25.png" alt=""></p><p>\u5357\u745E\u96C6\u56E2\u662F\u56FD\u5BB6\u7535\u7F51\u76F4\u5C5E\u7684\u79D1\u7814\u4F01\u4E1A\u5355\u4F4D\uFF0C\u4E3B\u8981\u505A\u7535\u529B\u7CFB\u7EDF\u81EA\u52A8\u5316\u76F8\u5173\u8BBE\u5907\uFF0C\u6240\u4EE5\u4F1A\u62DB\u5F88\u591A\u7A0B\u5E8F\u5458\u3002\u5E74\u85AA 14 \u4E07\u5DE6\u53F3\u3002\u5357\u745E\u8981\u7ED9\u5404\u4E2A\u7701\u516C\u53F8\u505A\u7535\u529B\u8F6F\u4EF6\uFF0C\u6240\u4EE5\u51FA\u5DEE\u7684\u60C5\u51B5\u4F1A\u975E\u5E38\u591A\u3002\u9762\u8BD5\u4E0A\u5357\u745E\u4EE5\u540E\u4F60\u8FD8\u6CA1\u6709\u56FD\u5BB6\u7535\u7F51\u7F16\u5236\uFF0C\u60F3\u8981\u7F16\u5236\u8FD8\u8981\u53BB\u53C2\u52A0\u7535\u7F51\u7684\u8003\u8BD5\u3002\u611F\u89C9\u6027\u4EF7\u6BD4\u4E00\u822C\uFF0C\u4E0D\u5982\u53BB\u7701\u516C\u53F8\uFF0C\u542C\u8BF4\u7701\u516C\u53F8\u5DE5\u8D44\u8FD8\u633A\u9AD8\u7684\u3002</p><h3 id="\u8FD0\u8425\u5546" tabindex="-1"><a class="header-anchor" href="#\u8FD0\u8425\u5546" aria-hidden="true">#</a> \u8FD0\u8425\u5546</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-6f4cd4bc-e1da-496c-bf00-7ef2e6089dee.png" alt=""></p><p>\u51E0\u4E2A\u8FD0\u8425\u5546\u91CC\u53EA\u6709\u8054\u901A\u5728\u5357\u4EAC\u6709\u7814\u7A76\u9662\u4E13\u95E8\u505A\u8F6F\u4EF6\u76F8\u5173\uFF0C\u9664\u6B64\u4E4B\u5916\u60F3\u53BB\u8FD0\u8425\u5546\u5C31\u53EA\u6709\u7701\u516C\u53F8\u4E86\u3002\u4E00\u4E9B\u8FD0\u8425\u5546\u7684\u5B50\u516C\u53F8\u6211\u5C31\u4E0D\u591A\u4ECB\u7ECD\u4E86\uFF0C\u6211\u662F\u611F\u89C9\u56FD\u4F01\u7684\u5B50\u516C\u53F8\u6027\u4EF7\u6BD4\u4E00\u822C\uFF0C\u65E2\u6CA1\u6709\u56FD\u4F01\u7684\u7A33\u5B9A\u4E5F\u6CA1\u4E92\u8054\u7F51\u7684\u9AD8\u85AA\u3002</p><h3 id="\u70FD\u706B" tabindex="-1"><a class="header-anchor" href="#\u70FD\u706B" aria-hidden="true">#</a> \u70FD\u706B</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-d16dd7fe-f7a0-4f70-a016-f88350a56fa7.png" alt=""></p><p>\u7B80\u5355\u8BF4\u4E0B\u70FD\u706B\uFF0C\u4E0B\u9762\u6709\u70FD\u706B\u661F\u7A7A\u8FD8\u6709\u70FD\u706B\u901A\u4FE1\u3002\u662F\u56FD\u4F01\uFF0C\u4E0D\u8FC7\u611F\u89C9\u4E00\u76F4\u5904\u4E8E\u4E00\u4E2A\u4E59\u65B9\u7684\u4F4D\u7F6E\u3002\u9879\u76EE\u5F88\u591A\u662F\u6D89\u5BC6\u9879\u76EE\uFF0C\u4F46\u662F\u6211\u529D\u5927\u5BB6\u5C3D\u91CF\u5C11\u78B0\u6D89\u5BC6\u7C7B\u578B\u7684\u9879\u76EE\u3002\u5982\u679C\u624B\u5934\u6CA1\u5927\u516C\u53F8\u53EF\u4EE5\u53BB\u70FD\u706B\u953B\u70BC\u4E0B\uFF0C\u5982\u679C\u6709\u5176\u5B83\u5927\u516C\u53F8\u7684 offer\uFF0C\u6211\u611F\u89C9\u8FD8\u662F\u4F18\u5148\u5176\u5B83\u5927\u516C\u53F8\u4E86\u3002</p><h2 id="\u751F\u6D3B" tabindex="-1"><a class="header-anchor" href="#\u751F\u6D3B" aria-hidden="true">#</a> \u751F\u6D3B</h2><h3 id="\u623F\u4EF7" tabindex="-1"><a class="header-anchor" href="#\u623F\u4EF7" aria-hidden="true">#</a> 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diff --git a/dist/assets/nanjing.html.44d630fa.js b/dist/assets/nanjing.html.44d630fa.js
new file mode 100644
index 00000000..36b23985
--- /dev/null
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deleted file mode 100644
index e25d8db9..00000000
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14 \u7EA7\u3002\u7814\u7A76\u751F\u5927\u90E8\u5206\u662F 14\u7EA7\uFF0C\u4E00\u4E9B\u9762\u8BD5\u8868\u73B0\u4E00\u822C\u7684\u53EF\u80FD\u4E5F\u4F1A\u5B9A\u523013\u7EA7\u300215\u7EA7\u57FA\u672C\u4E0A\u9700\u8981\u8BFB\u4E66\u671F\u95F4\u53D1\u8FC7\u6709\u542B\u91D1\u91CF\u7684\u8BBA\u6587\u6216\u8005\u53C2\u4E0E\u8FC7\u91CD\u5927\u5F00\u6E90\u9879\u76EE\u3002\u5357\u4EAC\u8363\u8000\u5DE5\u4F5C\u5236\u5EA6\u57FA\u672C\u4E0A\u5C31\u662F 996\u3002</p><h3 id="\u534E\u4E3A" tabindex="-1"><a class="header-anchor" href="#\u534E\u4E3A" aria-hidden="true">#</a> \u534E\u4E3A</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-f8ba1f60-c3bc-450b-b833-54db9bfdb807.png" alt=""></p><p>\u6821\u62DB\u85AA\u8D44\uFF1A13\u7EA7\u6708\u85AA 20-21k\uFF0C14 \u7EA7 23-25k\uFF0C15\u7EA7\u6708\u85AA 26-27k\u3002\u6BCF\u5E74 14-16 \u85AA\u300216\u7EA7\u6211\u5C31\u4E0D\u6E05\u695A\u4E86\u3002</p><p>\u4E2A\u4EBA\u8BC4\u4EF7\uFF1A\u611F\u89C9\u534E\u4E3A\u4ECA\u5E74\u6821\u62DB\u85AA\u8D44\u6C34\u5E73\u63D0\u5347\u4E86\u4E0D\u5C11\uFF0C\u6211\u6821\u62DB\u90A3\u5E74\u62A0\u7684\u8981\u6B7B\uFF0C14a \u624D\u80FD\u7ED9\u5230 19k\u3002\u8981\u662F\u4ECA\u5E74\u8FD9\u85AA\u8D44\u6C34\u5E73\u6211\u5F88\u53EF\u80FD\u5C31\u7559\u5230\u897F\u5B89\u534E\u4E3A\u4E86\uFF0C\u4E5F\u5C31\u4E0D\u5317\u6F02\u4E86\u3002\u4E0D\u8FC7\u534E\u4E3A\u53EA\u7ED9 5% \u7684\u516C\u79EF\u91D1\u662F\u6709\u70B9\u4F4E\u3002\u611F\u89C9\u534E\u4E3A\u60F3\u8981\u8BC4\u523015\u7EA7\u4EE5\u4E0A\u662F\u9700\u8981\u4F60\u5728\u8BFB\u4E66\u671F\u95F4\u6709\u4E00\u4E9B\u80FD\u8BC1\u660E\u4F60\u80FD\u529B\u7684\u4E1C\u897F\uFF0C\u6BD4\u5982\u6BD4\u8F83\u6709\u542B\u91D1\u91CF\u7684\u8BBA\u6587\uFF0C\u6216\u8005\u53C2\u4E0E\u8FC7\u91CD\u5927\u7684\u9879\u76EE\u3002\u5982\u679C\u624B\u91CC\u6CA1\u542B\u91D1\u91CF\u7684\u4E1C\u897F\uFF0C\u9760\u9762\u8BD5\u8868\u73B0\u6765\u8BF4\u6700\u591A\u4E5F\u5C31\u662F\u7ED9\u523014\u7EA7\u4E86\u3002\uFF08\u53CD\u6B63\u6211\u9762\u8BD5\u90A3\u5E74\u662F\u8FD9\u6837\uFF09\u3002\u534E\u4E3A\u5BF9\u4E8E\u90E8\u5206\u7279\u522B\u725B\u903C\u7684\u7855\u58EB\u4F1A\u7ED9\u5230 16\u7EA7\u3002\u5357\u4EAC\u534E\u4E3A\u5728\u51E0\u4E2A\u7814\u53D1\u4E2D\u5FC3\u7B97\u662F\u52A0\u73ED\u6BD4\u8F83\u5C11\u7684\uFF0C\u53EA\u662F\u76F8\u5BF9\u554A.</p><h3 id="\u5C0F\u7C73" tabindex="-1"><a class="header-anchor" href="#\u5C0F\u7C73" aria-hidden="true">#</a> \u5C0F\u7C73</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-bfb9cd80-f9b5-4ea7-b4f6-a15e54cf3c4b.png" alt=""></p><p>\u6821\u62DB\u85AA\u8D44\uFF1A\u5C0F\u7C73\u7684\u85AA\u8D44\u662F\u633A\u62A0\uFF0C\u4E0D\u8FC7\u653E\u5728\u5357\u4EAC\u6765\u770B\u4E5F\u8FD8\u884C\u3002\u770B\u6821\u62DB\u85AA\u6C34\u4E0A\u5357\u4EAC\u7684\u85AA\u8D44\u7206\u6599\u4ECA\u5E74\u6709 11k\uFF0C14k\uFF0C16k\uFF0C18k\uFF0C19k\uFF0C21k\uFF0C23k \u51E0\u4E2A\u6863\u300211k\uFF0C14k\u57FA\u672C\u90FD\u662F\u672C\u79D1\u751F\uFF0C\u7855\u58EB\u505A\u5F00\u53D1\u5C97\u7684\u5927\u90E8\u5206\u662F16k\uFF0C18k\uFF0C19k\u8FD9\u51E0\u4E2A\u6863\u300220k \u4EE5\u4E0A\u7684\u57FA\u672C\u90FD\u662F\u505A\u7B97\u6CD5\u7684\u3002</p><p>\u4E2A\u4EBA\u8BC4\u4EF7\uFF1A\u5357\u4EAC\u7684\u5C0F\u7C73\u7B97\u662F\u4E00\u4E2A\u6BD4\u8F83\u5927\u7684\u7814\u53D1\u4E2D\u5FC3\uFF0C\u6709\u4E9B\u5C0F\u7C73\u6BD4\u8F83\u6838\u5FC3\u7684\u90E8\u95E8\u3002\u5357\u4EAC\u5C0F\u7C73\u5927\u90E8\u5206\u7EC4\u5468\u672B\u53CC\u4F11\u662F\u80FD\u4FDD\u8BC1\u7684\uFF0C\u5468\u5185\u4E0A\u73ED\u5230\u51E0\u70B9\u5404\u7EC4\u60C5\u51B5\u4E0D\u4E00\u81F4\uFF0C\u603B\u4F53\u4E0A\u5C31\u662F 995 \u8FD9\u4E48\u4E2A\u60C5\u51B5\u3002</p><h3 id="vivo" tabindex="-1"><a class="header-anchor" href="#vivo" aria-hidden="true">#</a> Vivo</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-7d676f6f-b081-4eb7-a2ce-3590a04b2fcd.png" alt=""></p><p>\u6821\u62DB\u85AA\u8D44\uFF1A\u5357\u4EAC\u8FD9\u8FB9\u76EE\u524D\u770B\u5230\u7ED9\u5E94\u5C4A\u751F\u7684\u4EF7\u94B1\u5206\u4E3A\u6708\u85AA17k\uFF0C20k\uFF0C24k\u4E09\u4E2A\u6863\uFF0C\uFF0C\u6BCF\u5E7415\u85AA\u3002\u989D\u5916\u6BCF\u4E2A\u6708\u6709 1500 \u7684\u79DF\u623F\u8865\u8D34\u3002\u4F4F\u623F\u516C\u79EF\u91D15%\u3002</p><p>\u4E2A\u4EBA\u8BC4\u4EF7\uFF1A\u4E4B\u524D Vivo \u662F\u6709\u5927\u5C0F\u5468\u7684\uFF08\u5C31\u662F\u9694\u4E00\u5468\u4E00\u6B21\u5355\u4F11\uFF09\uFF0C\u53BB\u5E74\u4E5D\u6708\u4EFD\u7EDF\u4E00\u6210\u53CC\u4F11\u4E86\uFF0C\u5DE5\u4F5C\u5236\u5EA6\u5DEE\u4E0D\u591A 995 \u6216\u8005 9105 \u7684\u6837\u5B50\u3002\u5468\u5185\u5C31\u6CA1\u65F6\u95F4\u5E72\u522B\u7684\u4E8B\u4E86\uFF0C\u4E0D\u8FC7 Vivo \u8FD9\u4E2A\u85AA\u8D44\u5728\u5357\u4EAC\u786E\u5B9E\u7B97\u662F\u8FD8\u4E0D\u9519\u4E86\u3002</p><h3 id="oppo" tabindex="-1"><a class="header-anchor" href="#oppo" aria-hidden="true">#</a> OPPO</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-9ad6c7fe-c486-4628-8e07-f21b3e2cac6d.png" alt=""></p><p>\u6821\u62DB\u85AA\u8D44\uFF1A\u5177\u4F53\u85AA\u8D44\u4E0D\u592A\u6E05\u695A\uFF0C\u5927\u81F4\u5E94\u5C4A\u751F\u6708\u85AA\u5728 20k \u4E0A\u4E0B\uFF0C\u6BCF\u5E74 14 -15 \u4E2A\u6708\u85AA\u8D44\u3002</p><p>\u4E2A\u4EBA\u8BC4\u4EF7\uFF1AOPPO \u7684\u85AA\u8D44\u6CA1\u8C03\u67E5\u6E05\u695A\uFF0C\u4FE1\u606F\u6BD4\u8F83\u5C11\uFF0C\u4E0D\u8FC7\u5E94\u8BE5\u548C VIVO \u5DEE\u4E0D\u591A\u3002\u84DD\u7EFF\u4E24\u5382\u90FD\u662F\u4ECE\u6B65\u6B65\u9AD8\u62C6\u5206\u51FA\u6765\u7684\uFF0C\u4E24\u5144\u5F1F\u4ECE\u85AA\u8D44\u4E0A\u4EE5\u53CA\u5DE5\u4F5C\u6A21\u5F0F\u4E0A\u90FD\u5F88\u50CF\u3002OPPO \u548C VIVO \u5728\u5357\u4EAC\u90FD\u7B97\u662F\u4E0D\u9519\u7684\u9009\u62E9\u3002</p><h3 id="\u4E2D\u5174" tabindex="-1"><a class="header-anchor" href="#\u4E2D\u5174" aria-hidden="true">#</a> \u4E2D\u5174</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-094809df-30b0-40c6-a1a5-f1e0a5329b6a.png" alt=""></p><p>\u6821\u62DB\u85AA\u8D44\uFF1A\u4E2D\u5174\u5E38\u89C4\u8BA1\u5212\uFF08\u6307\u7684\u662F\u666E\u901A offer)\u7684\u6708\u85AA\u57FA\u672C\u90FD\u572820k \u4EE5\u5185\uFF0C\u84DD\u5251\u8BA1\u5212\u5E74\u85AA\u4F1A\u5728 40w \u4EE5\u4E0A\u3002</p><p>\u4E2A\u4EBA\u8BC4\u4EF7\uFF1A\u4E2D\u5174\u8FD9\u4E24\u5E74\u7684\u7ADE\u4E89\u529B\u4E00\u76F4\u5904\u5728\u4E00\u4E2A\u4E0B\u6ED1\u7684\u72B6\u6001\uFF0C\u611F\u89C9\u84DD\u5251\u8BA1\u5212\u8FD8\u4E0D\u9519\uFF0C\u4F46\u662F\u540D\u989D\u5F88\u5C11\uFF0C\u4E00\u4E2A\u90E8\u95E8\u53EA\u6709\u4E00\u4E24\u4E2A\u540D\u989D\u3002\u5F53\u65F6\u4E2D\u5174\u84DD\u5251\u8BA1\u5212\u6765\u6211\u4EEC\u5B66\u6821\u5BA3\u8BB2\u8FC7\uFF0C\u6211\u548C\u4E00\u4E2A\u90E8\u95E8\u7684 leader \u4E0B\u6765\u804A\u4E86\u4E0B\uFF0C\u770B\u4E86\u6211\u7684\u60C5\u51B5\u4EE5\u540E\u8BF4\u5E38\u89C4\u6279\u6B21\u7684\u6700\u9AD8\u7684 offer \u7ED9\u6211\u6CA1\u95EE\u9898\uFF0C\u4F46\u662F\u84DD\u5251\u4ED6\u4EEC\u76EE\u524D\u5907\u9009\u7684\u4E24\u4E2A\u4EBA\u624B\u4E0A\u90FD\u6709\u542B\u91D1\u91CF\u5F88\u9AD8\u7684\u8BBA\u6587\u548C\u9879\u76EE\uFF0C\u6211\u548C\u4EBA\u5BB6\u5DEE\u8DDD\u5F88\u660E\u663E\u3002\u4E2D\u5174\u5E38\u89C4\u62DB\u8058\u8BA1\u5212\u7684 offer \u548C\u5927\u90E8\u5206\u5927\u516C\u53F8\u5C31\u6CA1\u6CD5\u6BD4\u4E86\u3002</p><h3 id="_360" tabindex="-1"><a class="header-anchor" href="#_360" aria-hidden="true">#</a> 360</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-0bec3704-902d-4b8b-90b7-4ab5fc28a79d.png" alt=""></p><p>\u6821\u62DB\u85AA\u8D44\uFF1A\u6CA1\u8C03\u67E5\u6E05\u695A\uFF0C\u5E74\u85AA\u5DEE\u4E0D\u591A 23w \u5DE6\u53F3\u3002</p><p>\u4E2A\u4EBA\u8BC4\u4EF7\uFF1A\u5357\u4EAC360\u6709\u5EFA\u90BA\u533A\u548C\u4E5D\u9F99\u6E56\u4E24\u4E2A\u529E\u516C\u533A\uFF0C\u4E5D\u9F99\u6E56\u7684\u4E1A\u52A1\u6BD4\u8F83\u6838\u5FC3\u3002360 \u76EE\u524D\u5DE5\u4F5C\u751F\u6D3B\u6BD4\u8F83\u5E73\u8861\uFF0C\u5728\u4ECB\u7ECD\u5317\u4EAC\u65F6\u8BE6\u7EC6\u4ECB\u7ECD\u8FC7 360\uFF0C\u5927\u5BB6\u53EF\u4EE5\u70B9\u8FD9\u91CC\u8FDB\u53BB\u770B\u4E0B\uFF0C\u6765\u5317\u4EAC 360 \u6211\u8FD8\u662F\u6BD4\u8F83\u63A8\u8350\u7684\u3002\u5357\u4EAC 360 \u4E3B\u8981\u505A toB \u4E1A\u52A1\uFF0C\u76EE\u524D\u5357\u4EAC 360 \u7684\u72B6\u51B5\u4E0D\u592A\u597D\uFF0C\u8FD8\u4F20\u51FA\u8FC7\u5357\u4EAC\u4E1A\u52A1\u56E2\u961F\u4F1A\u88AB\u64A4\u6389\u7684\u4F20\u8A00\uFF08\u8FD9\u53EA\u662F\u4F20\u8A00\u554A\uFF0C\u771F\u5B9E\u6027\u4E0D\u662F\u5F88\u9AD8\uFF0C\u4F46\u662F\u4E5F\u53CD\u6620\u51FA 360 \u5357\u4EAC\u4E1A\u52A1\u60C5\u51B5\u4E0D\u592A\u597D\uFF09\u60F3\u8981\u53BB\u7684\u8BDD\u5927\u5BB6\u81EA\u5DF1\u4E00\u5B9A\u8981\u95EE\u6E05\u695A\u3002</p><h3 id="\u6DF1\u4FE1\u670D" tabindex="-1"><a class="header-anchor" href="#\u6DF1\u4FE1\u670D" aria-hidden="true">#</a> \u6DF1\u4FE1\u670D</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-5041109f-e9d8-4419-9f41-466f93708c53.png" alt=""></p><p>\u6821\u62DB\u85AA\u8D44\uFF1A\u5F00\u53D1\u5C97\u67093\u4E2A\u6863\uFF0C\u6708\u85AA\u5206\u5E03\u572815.6 - 22.8k \u8FD9\u4E2A\u533A\u95F4\uFF0C\u7B97\u6CD5\u5C97\u4E5F\u662F\u4E09\u4E2A\u6863\uFF0C\u6708\u85AA\u5206\u5E03\u572819 - 25.2k \u8FD9\u4E2A\u533A\u95F4\u3002\u6BCF\u5E7413 - 15 \u85AA</p><p>\u4E2A\u4EBA\u8BC4\u4EF7\uFF1A\u6DF1\u4FE1\u670D\u603B\u4F53\u6765\u8BF4\u52A0\u73ED\u633A\u4E25\u91CD\u7684\uFF0C\u4E0D\u8FC7\u5357\u4EAC\u7684\u6DF1\u4FE1\u670D\u76F8\u5BF9\u6DF1\u5733\u7A0D\u5FAE\u597D\u4E00\u70B9\u3002\u6BD4\u8F83\u597D\u7684\u5C31\u662F\u6DF1\u4FE1\u670D\u6280\u672F\u8FD8\u4E0D\u9519\uFF0C\u53E6\u5916\u4ED8\u51FA\u548C\u6536\u5165\u6210\u6B63\u6BD4\uFF0C\u5176\u5B9E\u5927\u90E8\u5206\u4EBA\u4E0D\u662F\u5403\u4E0D\u4E86\u82E6\uFF0C\u800C\u662F\u5DE5\u4F5C\u65F6\u4ED8\u51FA\u548C\u6536\u5165\u4E0D\u6210\u6B63\u6BD4\u3002</p><h3 id="\u8D8B\u52BF\u79D1\u6280" tabindex="-1"><a class="header-anchor" href="#\u8D8B\u52BF\u79D1\u6280" aria-hidden="true">#</a> \u8D8B\u52BF\u79D1\u6280</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-f60ae6ee-13d7-4efc-bd5a-a0334b76c6e3.png" alt=""></p><p>\u6821\u62DB\u85AA\u8D44\uFF1A\u770B\u5230\u6821\u62DB\u85AA\u8D44\u7206\u6599\u6709\u4E09\u4E2A\u6863\uFF0C\u5206\u522B\u662F\u5E74\u85AA 20w\uFF0C23.5w \u548C 25w\u3002</p><p>\u4E2A\u4EBA\u8BC4\u4EF7\uFF1A\u8D8B\u52BF\u79D1\u6280\u662F\u4E00\u5BB6\u5916\u4F01\uFF0C\u5728\u5357\u4EAC\u5F88\u591A\u5E74\u4E86\uFF0C\u5728\u5B89\u5168\u65B9\u9762\u505A\u7684\u4E0D\u9519\u3002\u53EF\u4EE5\u770B\u51FA\u6765\uFF0C\u8D8B\u52BF\u79D1\u6280\u7684\u5DE5\u8D44\u4E0D\u7B97\u9AD8\uFF08\u8FD9\u4E2A\u85AA\u8D44\u5728\u524D\u4E24\u5E74\u8FD8\u53EF\u4EE5\uFF0C\u4F46\u5728\u4ECA\u5E74\u5404\u5927\u5382\u6821\u62DB\u85AA\u8D44\u5927\u6DA8\u7684\u60C5\u51B5\u4E0B\u5C31\u4E0D\u592A\u591F\u770B\u4E86\uFF09\uFF0C\u5DE5\u8D44\u4F4E\u4F34\u968F\u7740\u516C\u53F8\u5F88\u591A\u6280\u672F\u5927\u795E\u6D41\u5931\u3002\u5E76\u4E14\u516C\u53F8\u572820\u5E74\u5E95\u6709\u6B21\u5927\u7684\u4EBA\u5458\u67B6\u6784\u8C03\u6574\uFF0C\u4E5F\u8D70\u4E86\u5F88\u591A\u4EBA\u3002\u76EE\u524D\u516C\u53F8\u53EA\u662F\u80DC\u5728\u5DE5\u4F5C\u8F7B\u677E\u52A0\u73ED\u5C11\u4E86\u3002</p><h3 id="\u4E9A\u4FE1\u5B89\u5168" tabindex="-1"><a class="header-anchor" href="#\u4E9A\u4FE1\u5B89\u5168" aria-hidden="true">#</a> \u4E9A\u4FE1\u5B89\u5168</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-97e8edd1-2a4d-492c-9039-febbae881c05.png" alt=""></p><p>\u6821\u62DB\u85AA\u8D44\uFF1A\u57FA\u672C\u4E0A\u6708\u85AA\u572815-18.5k \u8FD9\u4E2A\u533A\u95F4\uFF0C\u6BCF\u5E74 13- 15\u85AA\u3002</p><p>\u4E2A\u4EBA\u8BC4\u4EF7\uFF1A\u4E9A\u4FE1\u5B89\u5168\u4E3B\u8981\u505A\u8FD0\u8425\u5546\u7684\u9879\u76EE\u3002\u4E9A\u4FE1\u79D1\u6280\u77E5\u4E4E\u4E0A\u88AB\u55B7\u7684\u8FD8\u633A\u591A\u7684\uFF0C\u4E0D\u8FC7\u4E9A\u4FE1\u5B89\u5168\u76EE\u524D\u98CE\u8BC4\u8FD8\u53EF\u4EE5\uFF0C\u52A0\u73ED\u5C11\u4E9B\u3002</p><h3 id="shein" tabindex="-1"><a class="header-anchor" href="#shein" aria-hidden="true">#</a> SHEIN</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-fc7ddb5b-cbc1-482f-9087-ea9e3e136795.png" alt=""></p><p>\u6821\u62DB\u85AA\u8D44\uFF1A\u76EE\u524D\u770B\u6821\u62DB\u85AA\u8D44\u7206\u6599\u6708\u85AA\u57FA\u672C\u96C6\u4E2D\u572816-23k\uFF0C\u6709\u4E2A\u8BF4\u81EA\u5DF1 27k \u7684\u4E0D\u77E5\u9053\u771F\u7684\u5047\u7684\uFF08\u5982\u679C\u662F\u771F\u7684\uFF0C\u611F\u89C9 SHEIN \u5927\u90E8\u5206\u8001\u5458\u5DE5\u8981RUN\u4E86\uFF09\u3002\u6BCF\u5E7414\u85AA\u3002</p><p>\u4E2A\u4EBA\u8BC4\u4EF7\uFF1ASHEIN \u6211\u66FE\u7ECF\u8FD8\u62FF\u8FC7\u8FD9\u5BB6\u516C\u53F8\u7684 offer\u3002\u516C\u53F8\u505A\u8DE8\u5883\u7535\u5546\u7684\uFF0C\u4E3B\u8981\u5356\u5973\u88C5\u3002\u9762\u8BD5\u76F8\u5BF9\u5BB9\u6613\u4E00\u4E9B\uFF0C\u57FA\u672C\u5C31\u662F\u95EE\u4E9B\u5E38\u95EE\u7684\u516B\u80A1\u6587\uFF0C\u90FD\u6CA1\u8BA9\u6211\u624B\u6495\u4EE3\u7801\u3002SHEIN \u6280\u672F\u8FD8\u884C\uFF0C\u4E00\u4E9B\u62FF\u4E0D\u5230\u5927\u5382 offer \u7684\u540C\u5B66\uFF0C\u5148\u53BB\u8FD9\u91CC\u4E5F\u8FD8\u4E0D\u9519\u3002\u53E6\u5916\u5C31\u662F\u6211\u542C\u8BF4\u5357\u4EAC\u7684 SHEIN \u8D8A\u6765\u8D8A\u5377\u4E86\uFF0C\u4E0D\u662F\u66FE\u7ECF\u7684 965 \u4E86\u3002</p><h3 id="\u6EE1\u5E2E\u96C6\u56E2" tabindex="-1"><a class="header-anchor" href="#\u6EE1\u5E2E\u96C6\u56E2" aria-hidden="true">#</a> \u6EE1\u5E2E\u96C6\u56E2</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-ec98654b-0bcf-4e96-bb52-fe7ebd2a6c55.png" alt=""></p><p>\u6821\u62DB\u85AA\u8D44\uFF1A\u6821\u62DB\u85AA\u6C34\u4E0A\u7684\u7206\u6599\u5F00\u53D1\u6708\u85AA\u57FA\u672C\u90FD\u5728 20-30k \u8FD9\u4E2A\u533A\u95F4\uFF0C\u7B97\u6CD5\u57FA\u672C\u90FD\u5728 27-36k \u8FD9\u4E2A\u533A\u95F4\u3002\u5927\u90E8\u5206\u4EBA\u6BCF\u5E74 14 \u85AA\u3002</p><p>\u4E2A\u4EBA\u8BC4\u4EF7\uFF1A\u6EE1\u5E2E\u5C31\u662F\u5357\u4EAC\u7684\u672C\u571F\u4F01\u4E1A\uFF0C\u4E3B\u8981\u662F\u505A\u8D27\u8FD0\u4E1A\u52A1\u7684\u3002\u5357\u4EAC\u8FD9\u8FB9\u80FD\u7ED9\u51FA\u4E0A\u9762\u7684\u85AA\u8D44\uFF0C\u786E\u5B9E\u96BE\u5F97\uFF0C\u4E0D\u8FC7\u4ECE\u7ED9\u8FD9\u4E48\u591A\u94B1\u5C31\u80FD\u770B\u51FA\u6765\uFF0C\u52A0\u73ED\u80AF\u5B9A\u5C11\u4E0D\u4E86\u3002\u6EE1\u5E2E\u76EE\u524D\u62DB\u4EBA\u633A\u591A\u7684\u3002</p><h2 id="\u56FD\u4F01" tabindex="-1"><a class="header-anchor" href="#\u56FD\u4F01" aria-hidden="true">#</a> \u56FD\u4F01</h2><h3 id="\u4E2D\u7535\u7CFB\u5217" tabindex="-1"><a class="header-anchor" href="#\u4E2D\u7535\u7CFB\u5217" aria-hidden="true">#</a> \u4E2D\u7535\u7CFB\u5217</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-21fd091d-8afd-4cde-8fbd-a78b3c805085.png" alt=""></p><p>\u5357\u4EAC\u6709\u4E2D\u7535 28 \u6240\u3001\u4E2D\u7535 14 \u6240\u3001\u4E2D\u7535 841 \u6240\u3002\u6709\u4E00\u4E9B\u8BFB\u8005\u8DDF\u6211\u8BF4\u60F3\u53BB\u7814\u7A76\u6240\uFF0C\u60F3\u6CD5\u662F\u53BB\u7814\u7A76\u6240\u53EF\u4EE5\u5DE5\u4F5C\u751F\u6D3B\u5E73\u8861\u3002\u4F46\u662F\u73B0\u5728\u6709\u5F88\u591A\u7684\u7814\u7A76\u6240\u5176\u5B9E\u5F88\u5FD9\u7684\uFF0C\u5DE5\u4F5C\u751F\u6D3B\u5E73\u8861\u7684\u7814\u7A76\u6240\u5C24\u5176\u4E0D\u5305\u62EC\u5357\u4EAC\u8FD9\u51E0\u4E2A\u3002841 \u6240\u8FD8\u4E0D\u662F\u7279\u522B\u6E05\u695A\u3002\u5927\u90E8\u5206\u4E92\u8054\u7F51\u516C\u53F8\u548C\u4E2D\u7535 28 \u6240\u4EE5\u53CA 14 \u6240 \u6BD4\u8D77\u6765\u8FD8\u771F\u662F\u5F1F\u5F1F\uFF0C\u4E0D\u8FC7\u6839\u636E\u5357\u4EAC\u7684\u85AA\u8D44\u7684\u6C34\u5E73\u6765\u8BF4\uFF0C\u8FD9\u4E24\u4E2A\u6240\u5F97\u798F\u5229\u5F85\u9047\u7B97\u662F\u9876\u7EA7\u4E86\u3002\u521A\u6BD5\u4E1A\u7684\u5E94\u5C4A\u751F\u8FDB\u53BB\u5DE5\u8D44\u5927\u6982\u6BCF\u6708\u5230\u624B\u662F\u4E00\u4E07\u51FA\u5934\u5427\uFF0C\u6709\u98DF\u5802\u6709\u5BBF\u820D\uFF0C\u51FA\u5DEE\u4F1A\u6709\u51FA\u5DEE\u8865\u8D34\uFF0C\u5DEE\u4E0D\u591A\u4E00\u5929\u4E09\u56DB\u767E\uFF0C\u8FD9\u51E0\u4E2A\u6240\u51FA\u5DEE\u4F1A\u975E\u5E38\u7684\u591A\u3002</p><h3 id="\u5357\u745E\u96C6\u56E2-\u56FD\u7F51\u7535\u79D1\u9662" tabindex="-1"><a class="header-anchor" href="#\u5357\u745E\u96C6\u56E2-\u56FD\u7F51\u7535\u79D1\u9662" aria-hidden="true">#</a> \u5357\u745E\u96C6\u56E2\uFF08\u56FD\u7F51\u7535\u79D1\u9662\uFF09</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-aff2d53a-95b6-4654-baac-ebc2ba39fc25.png" alt=""></p><p>\u5357\u745E\u96C6\u56E2\u662F\u56FD\u5BB6\u7535\u7F51\u76F4\u5C5E\u7684\u79D1\u7814\u4F01\u4E1A\u5355\u4F4D\uFF0C\u4E3B\u8981\u505A\u7535\u529B\u7CFB\u7EDF\u81EA\u52A8\u5316\u76F8\u5173\u8BBE\u5907\uFF0C\u6240\u4EE5\u4F1A\u62DB\u5F88\u591A\u7A0B\u5E8F\u5458\u3002\u5E74\u85AA 14 \u4E07\u5DE6\u53F3\u3002\u5357\u745E\u8981\u7ED9\u5404\u4E2A\u7701\u516C\u53F8\u505A\u7535\u529B\u8F6F\u4EF6\uFF0C\u6240\u4EE5\u51FA\u5DEE\u7684\u60C5\u51B5\u4F1A\u975E\u5E38\u591A\u3002\u9762\u8BD5\u4E0A\u5357\u745E\u4EE5\u540E\u4F60\u8FD8\u6CA1\u6709\u56FD\u5BB6\u7535\u7F51\u7F16\u5236\uFF0C\u60F3\u8981\u7F16\u5236\u8FD8\u8981\u53BB\u53C2\u52A0\u7535\u7F51\u7684\u8003\u8BD5\u3002\u611F\u89C9\u6027\u4EF7\u6BD4\u4E00\u822C\uFF0C\u4E0D\u5982\u53BB\u7701\u516C\u53F8\uFF0C\u542C\u8BF4\u7701\u516C\u53F8\u5DE5\u8D44\u8FD8\u633A\u9AD8\u7684\u3002</p><h3 id="\u8FD0\u8425\u5546" tabindex="-1"><a class="header-anchor" href="#\u8FD0\u8425\u5546" aria-hidden="true">#</a> \u8FD0\u8425\u5546</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-6f4cd4bc-e1da-496c-bf00-7ef2e6089dee.png" alt=""></p><p>\u51E0\u4E2A\u8FD0\u8425\u5546\u91CC\u53EA\u6709\u8054\u901A\u5728\u5357\u4EAC\u6709\u7814\u7A76\u9662\u4E13\u95E8\u505A\u8F6F\u4EF6\u76F8\u5173\uFF0C\u9664\u6B64\u4E4B\u5916\u60F3\u53BB\u8FD0\u8425\u5546\u5C31\u53EA\u6709\u7701\u516C\u53F8\u4E86\u3002\u4E00\u4E9B\u8FD0\u8425\u5546\u7684\u5B50\u516C\u53F8\u6211\u5C31\u4E0D\u591A\u4ECB\u7ECD\u4E86\uFF0C\u6211\u662F\u611F\u89C9\u56FD\u4F01\u7684\u5B50\u516C\u53F8\u6027\u4EF7\u6BD4\u4E00\u822C\uFF0C\u65E2\u6CA1\u6709\u56FD\u4F01\u7684\u7A33\u5B9A\u4E5F\u6CA1\u4E92\u8054\u7F51\u7684\u9AD8\u85AA\u3002</p><h3 id="\u70FD\u706B" tabindex="-1"><a class="header-anchor" href="#\u70FD\u706B" aria-hidden="true">#</a> \u70FD\u706B</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-d16dd7fe-f7a0-4f70-a016-f88350a56fa7.png" alt=""></p><p>\u7B80\u5355\u8BF4\u4E0B\u70FD\u706B\uFF0C\u4E0B\u9762\u6709\u70FD\u706B\u661F\u7A7A\u8FD8\u6709\u70FD\u706B\u901A\u4FE1\u3002\u662F\u56FD\u4F01\uFF0C\u4E0D\u8FC7\u611F\u89C9\u4E00\u76F4\u5904\u4E8E\u4E00\u4E2A\u4E59\u65B9\u7684\u4F4D\u7F6E\u3002\u9879\u76EE\u5F88\u591A\u662F\u6D89\u5BC6\u9879\u76EE\uFF0C\u4F46\u662F\u6211\u529D\u5927\u5BB6\u5C3D\u91CF\u5C11\u78B0\u6D89\u5BC6\u7C7B\u578B\u7684\u9879\u76EE\u3002\u5982\u679C\u624B\u5934\u6CA1\u5927\u516C\u53F8\u53EF\u4EE5\u53BB\u70FD\u706B\u953B\u70BC\u4E0B\uFF0C\u5982\u679C\u6709\u5176\u5B83\u5927\u516C\u53F8\u7684 offer\uFF0C\u6211\u611F\u89C9\u8FD8\u662F\u4F18\u5148\u5176\u5B83\u5927\u516C\u53F8\u4E86\u3002</p><h2 id="\u751F\u6D3B" tabindex="-1"><a class="header-anchor" href="#\u751F\u6D3B" aria-hidden="true">#</a> \u751F\u6D3B</h2><h3 id="\u623F\u4EF7" tabindex="-1"><a class="header-anchor" href="#\u623F\u4EF7" aria-hidden="true">#</a> 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diff --git a/dist/assets/neicun-jiegou.html.e6842a53.js b/dist/assets/neicun-jiegou.html.fee2587a.js
similarity index 99%
rename from dist/assets/neicun-jiegou.html.e6842a53.js
rename to dist/assets/neicun-jiegou.html.fee2587a.js
index 7e024b4c..6f255416 100644
--- a/dist/assets/neicun-jiegou.html.e6842a53.js
+++ b/dist/assets/neicun-jiegou.html.fee2587a.js
@@ -1 +1 @@
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JVM\u3002\u8BE5\u89C4\u8303\u4E3B\u8981\u5305\u542B 6 \u4E2A\u90E8\u5206\uFF0C\u5206\u522B\u662F\uFF1A",-1),J=e("li",null,"\u7B2C\u4E00\u7AE0\uFF1A\u5F15\u8A00",-1),m=e("li",null,"\u7B2C\u4E8C\u7AE0\uFF1AJava \u865A\u62DF\u673A\u7ED3\u6784",-1),f=e("li",null,"\u7B2C\u4E09\u7AE0\uFF1AJava \u865A\u62DF\u673A\u7F16\u8BD1",-1),b=a("\u7B2C\u56DB\u7AE0\uFF1A"),g={href:"https://mp.weixin.qq.com/s/uMEZ2Xwctx4n-_8zvtDp5A",target:"_blank",rel:"noopener noreferrer"},j=a("Class \u6587\u4EF6"),x=e("li",null,"\u7B2C\u4E94\u7AE0\uFF1A\u52A0\u8F7D\u3001\u94FE\u63A5\u548C\u521D\u59CB\u5316",-1),M=e("li",null,"\u7B2C\u516D\u7AE0\uFF1AJava \u865A\u62DF\u673A\u6307\u4EE4\u96C6",-1),V=e("li",null,"\u7B2C\u4E03\u7AE0\uFF1A\u64CD\u4F5C\u7801",-1),C=n('<p>\u6839\u636E\u7B2C\u4E8C\u7AE0 Java \u865A\u62DF\u673A\u7ED3\u6784\u4E2D\u7684\u89C4\u5B9A\uFF0C\u8FD0\u884C\u65F6\u6570\u636E\u533A\u53EF\u4EE5\u5206\u4E3A\u4EE5\u4E0B\u51E0\u4E2A\u90E8\u5206\uFF0C\u89C1\u4E0B\u56FE\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/neicun-jiegou-e33179f3-275b-44c9-87f6-802198f8f360.png" alt=""></p><h3 id="_01\u3001\u7A0B\u5E8F\u8BA1\u6570\u5668" tabindex="-1"><a class="header-anchor" href="#_01\u3001\u7A0B\u5E8F\u8BA1\u6570\u5668" aria-hidden="true">#</a> 01\u3001\u7A0B\u5E8F\u8BA1\u6570\u5668</h3><p>\u7A0B\u5E8F\u8BA1\u6570\u5668\uFF08Program Counter Register\uFF09\u6240\u5360\u7684\u5185\u5B58\u7A7A\u95F4\u4E0D\u5927\uFF0C\u5F88\u5C0F\u4E00\u5757\uFF0C\u53EF\u4EE5\u770B\u4F5C\u662F\u5F53\u524D\u7EBF\u7A0B\u6240\u6267\u884C\u7684\u5B57\u8282\u7801\u6307\u4EE4\u7684\u884C\u53F7\u6307\u793A\u5668\u3002\u5B57\u8282\u7801\u89E3\u91CA\u5668\u4F1A\u5728\u5DE5\u4F5C\u7684\u65F6\u5019\u6539\u53D8\u8FD9\u4E2A\u8BA1\u6570\u5668\u7684\u503C\u6765\u9009\u53D6\u4E0B\u4E00\u6761\u9700\u8981\u6267\u884C\u7684\u5B57\u8282\u7801\u6307\u4EE4\uFF0C\u50CF\u5206\u652F\u3001\u5FAA\u73AF\u3001\u8DF3\u8F6C\u3001\u5F02\u5E38\u5904\u7406\u3001\u7EBF\u7A0B\u6062\u590D\u7B49\u529F\u80FD\u90FD\u9700\u8981\u4F9D\u8D56\u8FD9\u4E2A\u8BA1\u6570\u5668\u6765\u5B8C\u6210\u3002</p><p>\u5728 JVM \u4E2D\uFF0C\u591A\u7EBF\u7A0B\u662F\u901A\u8FC7\u7EBF\u7A0B\u8F6E\u6D41\u5207\u6362\u6765\u83B7\u5F97 CPU \u6267\u884C\u65F6\u95F4\u7684\uFF0C\u56E0\u6B64\uFF0C\u5728\u4EFB\u4E00\u5177\u4F53\u65F6\u523B\uFF0C\u4E00\u4E2A CPU \u7684\u5185\u6838\u53EA\u4F1A\u6267\u884C\u4E00\u6761\u7EBF\u7A0B\u4E2D\u7684\u6307\u4EE4\uFF0C\u56E0\u6B64\uFF0C\u4E3A\u4E86\u7EBF\u7A0B\u5207\u6362\u540E\u80FD\u6062\u590D\u5230\u6B63\u786E\u7684\u6267\u884C\u4F4D\u7F6E\uFF0C\u6BCF\u4E2A\u7EBF\u7A0B\u90FD\u9700\u8981\u6709\u4E00\u4E2A\u72EC\u7ACB\u7684\u7A0B\u5E8F\u8BA1\u6570\u5668\uFF0C\u5E76\u4E14\u4E0D\u80FD\u4E92\u76F8\u5E72\u6270\uFF0C\u5426\u5219\u5C31\u4F1A\u5F71\u54CD\u5230\u7A0B\u5E8F\u7684\u6B63\u5E38\u6267\u884C\u6B21\u5E8F\u3002</p><p>\u4E5F\u5C31\u662F\u8BF4\uFF0C\u6211\u4EEC\u8981\u6C42\u7A0B\u5E8F\u8BA1\u6570\u5668\u662F\u7EBF\u7A0B\u79C1\u6709\u7684\u3002</p><p>\u300AJava \u865A\u62DF\u673A\u89C4\u8303\u300B\u4E2D\u89C4\u5B9A\uFF0C\u5982\u679C\u7EBF\u7A0B\u6267\u884C\u7684\u662F\u975E\u672C\u5730\uFF08native\uFF09\u65B9\u6CD5\uFF0C\u5219\u7A0B\u5E8F\u8BA1\u6570\u5668\u4E2D\u4FDD\u5B58\u7684\u662F\u5F53\u524D\u9700\u8981\u6267\u884C\u7684\u6307\u4EE4\u5730\u5740\uFF1B\u5982\u679C\u7EBF\u7A0B\u6267\u884C\u7684\u662F\u672C\u5730\u65B9\u6CD5\uFF0C\u5219\u7A0B\u5E8F\u8BA1\u6570\u5668\u4E2D\u7684\u503C\u662F undefined\u3002</p><p>\u4E3A\u4EC0\u4E48\u672C\u5730\u65B9\u6CD5\u5728\u7A0B\u5E8F\u8BA1\u6570\u5668\u4E2D\u7684\u503C\u662F undefined \u7684\uFF1F\u56E0\u4E3A\u672C\u5730\u65B9\u6CD5\u5927\u591A\u662F\u901A\u8FC7 C/C++ \u5B9E\u73B0\u7684\uFF0C\u5E76\u672A\u7F16\u8BD1\u6210\u9700\u8981\u6267\u884C\u7684\u5B57\u8282\u7801\u6307\u4EE4\u3002</p><p>\u7531\u4E8E\u7A0B\u5E8F\u8BA1\u6570\u5668\u4E2D\u5B58\u50A8\u7684\u6570\u636E\u6240\u5360\u7684\u7A7A\u95F4\u4E0D\u4F1A\u968F\u7A0B\u5E8F\u7684\u6267\u884C\u800C\u53D1\u751F\u5927\u5C0F\u4E0A\u7684\u6539\u53D8\uFF0C\u56E0\u6B64\uFF0C\u7A0B\u5E8F\u8BA1\u6570\u5668\u662F\u4E0D\u4F1A\u53D1\u751F\u5185\u5B58\u6EA2\u51FA\u73B0\u8C61\uFF08OutOfMemory\uFF09\u7684\u3002</p><h3 id="_02\u3001java-\u865A\u62DF\u673A\u6808" tabindex="-1"><a class="header-anchor" href="#_02\u3001java-\u865A\u62DF\u673A\u6808" aria-hidden="true">#</a> 02\u3001Java \u865A\u62DF\u673A\u6808</h3>',10),k=a("Java \u865A\u62DF\u673A\u6808\u4E2D\u662F\u4E00\u4E2A\u4E2A\u6808\u5E27\uFF0C\u6BCF\u4E2A\u6808\u5E27\u5BF9\u5E94\u4E00\u4E2A\u88AB\u8C03\u7528\u7684\u65B9\u6CD5\u3002\u5F53\u7EBF\u7A0B\u6267\u884C\u4E00\u4E2A\u65B9\u6CD5\u65F6\uFF0C\u4F1A\u521B\u5EFA\u4E00\u4E2A\u5BF9\u5E94\u7684\u6808\u5E27\uFF0C\u5E76\u5C06\u6808\u5E27\u538B\u5165\u6808\u4E2D\u3002\u5F53\u65B9\u6CD5\u6267\u884C\u5B8C\u6BD5\u540E\uFF0C\u5C06\u6808\u5E27\u4ECE\u6808\u4E2D\u79FB\u9664\u3002"),E={href:"https://mp.weixin.qq.com/s/fc48Z5tSMlBHweYIS1UL0g",target:"_blank",rel:"noopener noreferrer"},S=a("\u6808"),O=a("\u9075\u5FAA\u7684\u662F\u540E\u8FDB\u5148\u51FA\u7684\u539F\u5219\uFF0C\u6240\u4EE5\u7EBF\u7A0B\u5F53\u524D\u6267\u884C\u7684\u65B9\u6CD5\u5BF9\u5E94\u7684\u6808\u5E27\u5FC5\u5B9A\u5728 Java \u865A\u62DF\u673A\u6808\u7684\u9876\u90E8\u3002"),q=e("p",null,"\u6808\u5E27\u5305\u542B\u4EE5\u4E0B 5 \u4E2A\u90E8\u5206\uFF0C\u89C1\u4E0B\u56FE\u3002",-1),D=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/neicun-jiegou-4ea2a60a-05df-4ed1-8109-99ae23acefd1.png",alt:""})],-1),H={href:"https://tobebetterjavaer.com/jvm/how-jvm-run-zijiema-zhiling.md",target:"_blank",rel:"noopener noreferrer"},w=a("Java \u865A\u62DF\u673A\u6808"),I=n('<h3 id="_04\u3001\u5806" tabindex="-1"><a class="header-anchor" href="#_04\u3001\u5806" aria-hidden="true">#</a> 04\u3001\u5806</h3><p>\u5806\u662F\u6240\u6709\u7EBF\u7A0B\u5171\u4EAB\u7684\u4E00\u5757\u5185\u5B58\u533A\u57DF\uFF0C\u5728 Java \u865A\u62DF\u673A\u542F\u52A8\u7684\u65F6\u5019\u521B\u5EFA\uFF0C\u7528\u6765\u5B58\u50A8\u5BF9\u8C61\uFF08\u6570\u7EC4\u4E5F\u662F\u4E00\u79CD\u5BF9\u8C61\uFF09\u3002</p><p>\u4EE5\u524D\uFF0CJava \u4E2D\u201C\u51E0\u4E4E\u201D\u6240\u6709\u7684\u5BF9\u8C61\u90FD\u4F1A\u5728\u5806\u4E2D\u5206\u914D\uFF0C\u4F46\u968F\u7740 JIT\uFF08Just-In-Time\uFF09\u7F16\u8BD1\u5668\u7684\u53D1\u5C55\u548C\u9003\u9038\u6280\u672F\u7684\u9010\u6E10\u6210\u719F\uFF0C\u6240\u6709\u7684\u5BF9\u8C61\u90FD\u5206\u914D\u5230\u5806\u4E0A\u6E10\u6E10\u53D8\u5F97\u4E0D\u90A3\u4E48\u201C\u7EDD\u5BF9\u201D\u4E86\u3002\u4ECE JDK 7 \u5F00\u59CB\uFF0CJava \u865A\u62DF\u673A\u5DF2\u7ECF\u9ED8\u8BA4\u5F00\u542F\u9003\u9038\u5206\u6790\u4E86\uFF0C\u610F\u5473\u7740\u5982\u679C\u67D0\u4E9B\u65B9\u6CD5\u4E2D\u7684\u5BF9\u8C61\u5F15\u7528\u6CA1\u6709\u88AB\u8FD4\u56DE\u6216\u8005\u672A\u88AB\u5916\u9762\u4F7F\u7528\uFF08\u4E5F\u5C31\u662F\u672A\u9003\u9038\u51FA\u53BB\uFF09\uFF0C\u90A3\u4E48\u5BF9\u8C61\u53EF\u4EE5\u76F4\u63A5\u5728\u6808\u4E0A\u5206\u914D\u5185\u5B58\u3002</p><p>\u7B80\u5355\u89E3\u91CA\u4E00\u4E0B JIT \u548C\u9003\u9038\u5206\u6790\u3002</p><p>\u5E38\u89C1\u7684\u7F16\u8BD1\u578B\u8BED\u8A00\u5982 C++\uFF0C\u901A\u5E38\u4F1A\u628A\u4EE3\u7801\u76F4\u63A5\u7F16\u8BD1\u6210 CPU \u6240\u80FD\u7406\u89E3\u7684\u673A\u5668\u7801\u6765\u8FD0\u884C\u3002\u800C Java \u4E3A\u4E86\u5B9E\u73B0\u201C\u4E00\u6B21\u7F16\u8BD1\uFF0C\u5904\u5904\u8FD0\u884C\u201D\u7684\u7279\u6027\uFF0C\u628A\u7F16\u8BD1\u7684\u8FC7\u7A0B\u5206\u6210\u4E24\u90E8\u5206\uFF0C\u9996\u5148\u5B83\u4F1A\u5148\u7531 javac \u7F16\u8BD1\u6210\u901A\u7528\u7684\u4E2D\u95F4\u5F62\u5F0F\u2014\u2014\u5B57\u8282\u7801\uFF0C\u7136\u540E\u518D\u7531\u89E3\u91CA\u5668\u9010\u6761\u5C06\u5B57\u8282\u7801\u89E3\u91CA\u4E3A\u673A\u5668\u7801\u6765\u6267\u884C\u3002\u6240\u4EE5\u5728\u6027\u80FD\u4E0A\uFF0CJava \u53EF\u80FD\u4F1A\u5E72\u4E0D\u8FC7 C++ \u8FD9\u7C7B\u7F16\u8BD1\u578B\u8BED\u8A00\u3002</p><p>\u4E3A\u4E86\u4F18\u5316 Java \u7684\u6027\u80FD \uFF0CJVM \u5728\u89E3\u91CA\u5668\u4E4B\u5916\u5F15\u5165\u4E86 JIT \u7F16\u8BD1\u5668\uFF1A\u5F53\u7A0B\u5E8F\u8FD0\u884C\u65F6\uFF0C\u89E3\u91CA\u5668\u9996\u5148\u53D1\u6325\u4F5C\u7528\uFF0C\u4EE3\u7801\u53EF\u4EE5\u76F4\u63A5\u6267\u884C\u3002\u968F\u7740\u65F6\u95F4\u63A8\u79FB\uFF0C\u5373\u65F6\u7F16\u8BD1\u5668\u9010\u6E10\u53D1\u6325\u4F5C\u7528\uFF0C\u628A\u8D8A\u6765\u8D8A\u591A\u7684\u4EE3\u7801\u7F16\u8BD1\u4F18\u5316\u6210\u672C\u5730\u4EE3\u7801\uFF0C\u6765\u83B7\u53D6\u66F4\u9AD8\u7684\u6267\u884C\u6548\u7387\u3002\u89E3\u91CA\u5668\u8FD9\u65F6\u53EF\u4EE5\u4F5C\u4E3A\u7F16\u8BD1\u8FD0\u884C\u7684\u964D\u7EA7\u624B\u6BB5\uFF0C\u5728\u4E00\u4E9B\u4E0D\u53EF\u9760\u7684\u7F16\u8BD1\u4F18\u5316\u51FA\u73B0\u95EE\u9898\u65F6\uFF0C\u518D\u5207\u6362\u56DE\u89E3\u91CA\u6267\u884C\uFF0C\u4FDD\u8BC1\u7A0B\u5E8F\u53EF\u4EE5\u6B63\u5E38\u8FD0\u884C\u3002</p><p>\u9003\u9038\u5206\u6790\uFF08Escape Analysis\uFF09\uFF0C\u7B80\u5355\u6765\u8BB2\u5C31\u662F\uFF0CHotspot \u865A\u62DF\u673A\u53EF\u4EE5\u5206\u6790\u65B0\u521B\u5EFA\u5BF9\u8C61\u7684\u4F7F\u7528\u8303\u56F4\uFF0C\u5E76\u51B3\u5B9A\u662F\u5426\u5728 Java \u5806\u4E0A\u5206\u914D\u5185\u5B58\u7684\u4E00\u9879\u6280\u672F\u3002</p><p>\u5806\u662F Java \u5783\u573E\u6536\u96C6\u5668\u7BA1\u7406\u7684\u4E3B\u8981\u533A\u57DF\uFF0C\u56E0\u6B64\u4E5F\u88AB\u79F0\u4F5C GC \u5806\uFF08Garbage Collected Heap\uFF09\u3002\u4ECE\u5783\u573E\u56DE\u6536\u7684\u89D2\u5EA6\u6765\u770B\uFF0C\u7531\u4E8E\u5783\u573E\u6536\u96C6\u5668\u57FA\u672C\u90FD\u91C7\u7528\u4E86\u5206\u4EE3\u5783\u573E\u6536\u96C6\u7684\u7B97\u6CD5\uFF0C\u6240\u4EE5\u5806\u8FD8\u53EF\u4EE5\u7EC6\u5206\u4E3A\uFF1A\u65B0\u751F\u4EE3\u548C\u8001\u5E74\u4EE3\u3002\u65B0\u751F\u4EE3\u8FD8\u53EF\u4EE5\u7EC6\u5206\u4E3A\uFF1AEden \u7A7A\u95F4\u3001From Survivor\u3001To Survivor \u7A7A\u95F4\u7B49\u3002\u8FDB\u4E00\u6B65\u5212\u5206\u7684\u76EE\u7684\u662F\u66F4\u597D\u5730\u56DE\u6536\u5185\u5B58\uFF0C\u6216\u8005\u66F4\u5FEB\u5730\u5206\u914D\u5185\u5B58\u3002</p><p>\u5806\u8FD9\u6700\u5BB9\u6613\u51FA\u73B0\u7684\u5C31\u662F OutOfMemoryError \u9519\u8BEF\uFF0C\u5206\u4E3A\u4EE5\u4E0B\u51E0\u79CD\u8868\u73B0\u5F62\u5F0F\uFF1A</p><ul><li><code>OutOfMemoryError: GC Overhead Limit Exceeded</code>\uFF1A\u5F53 JVM \u82B1\u592A\u591A\u65F6\u95F4\u6267\u884C\u5783\u573E\u56DE\u6536\u5E76\u4E14\u53EA\u80FD\u56DE\u6536\u5F88\u5C11\u7684\u5806\u7A7A\u95F4\u65F6\uFF0C\u5C31\u4F1A\u53D1\u751F\u8BE5\u9519\u8BEF\u3002</li><li><code>java.lang.OutOfMemoryError: Java heap space</code>\uFF1A\u5047\u5982\u5728\u521B\u5EFA\u65B0\u7684\u5BF9\u8C61\u65F6, \u5806\u5185\u5B58\u4E2D\u7684\u7A7A\u95F4\u4E0D\u8DB3\u4EE5\u5B58\u653E\u65B0\u521B\u5EFA\u7684\u5BF9\u8C61, \u5C31\u4F1A\u5F15\u53D1\u8BE5\u9519\u8BEF\u3002\u548C\u672C\u673A\u7684\u7269\u7406\u5185\u5B58\u65E0\u5173\uFF0C\u548C\u6211\u4EEC\u914D\u7F6E\u7684\u865A\u62DF\u673A\u5185\u5B58\u5927\u5C0F\u6709\u5173\uFF01</li></ul><h3 id="_05\u3001\u5143\u7A7A\u95F4" tabindex="-1"><a class="header-anchor" href="#_05\u3001\u5143\u7A7A\u95F4" aria-hidden="true">#</a> 05\u3001\u5143\u7A7A\u95F4</h3><p>JDK 8 \u7684\u65F6\u5019\uFF0C\u539F\u6709\u7684\u65B9\u6CD5\u533A\uFF08\u66F4\u51C6\u786E\u7684\u8BF4\u5E94\u8BE5\u662F\u6C38\u4E45\u4EE3\uFF09\u88AB\u5F7B\u5E95\u79FB\u9664\uFF0C\u53D6\u800C\u4EE3\u4E4B\u7684\u662F\u5143\u7A7A\u95F4\u3002</p><p>\u6211\u4EEC\u6765\u8BF4\u8BF4\u65B9\u6CD5\u533A\u5427\u3002\u65B9\u6CD5\u533A\u548C\u5806\u4E00\u6837\uFF0C\u662F\u7EBF\u7A0B\u5171\u4EAB\u7684\u533A\u57DF\uFF0C\u5B83\u7528\u6765\u5B58\u50A8\u5DF2\u7ECF\u88AB Java \u865A\u62DF\u673A\u52A0\u8F7D\u7684\u7C7B\u4FE1\u606F\u3001\u5E38\u91CF\u3001\u9759\u6001\u53D8\u91CF\uFF0C\u4EE5\u53CA\u4FBF\u5668\u7F16\u8BD1\u540E\u7684\u4EE3\u7801\u7B49\u3002</p><p>\u5728\u6709\u4E9B\u5730\u65B9\uFF0C\u65B9\u6CD5\u533A\u4E5F\u88AB\u79F0\u4E3A\u6C38\u4E45\u4EE3\u3002\u4F46\u5176\u5B9E\u4E0D\u80FD\u8FD9\u4E48\u7406\u89E3\u3002</p><blockquote><p>\u300AJava \u865A\u62DF\u673A\u89C4\u8303\u300B\u4E2D\u53EA\u89C4\u5B9A\u4E86\u6709\u65B9\u6CD5\u533A\u8FD9\u4E48\u4E00\u4E2A\u6982\u5FF5\u548C\u5B83\u7684\u4F5C\u7528\uFF0C\u5E76\u6CA1\u6709\u89C4\u5B9A\u5982\u4F55\u53BB\u5B9E\u73B0\u5B83\u3002\u90A3\u4E48\u4E0D\u540C\u7684 Java \u865A\u62DF\u673A\u53EF\u80FD\u5C31\u4F1A\u6709\u4E0D\u540C\u7684\u5B9E\u73B0\u3002\u6C38\u4E45\u4EE3\u662F HotSpot \u5BF9\u65B9\u6CD5\u533A\u7684\u4E00\u79CD\u5B9E\u73B0\u5F62\u5F0F\u3002\u4E5F\u5C31\u662F\u8BF4\uFF0C\u6C38\u4E45\u4EE3\u53EA\u662F HotSpot \u4E2D\u7684\u4E00\u4E2A\u6982\u5FF5\uFF0C\u800C\u65B9\u6CD5\u533A\u5219\u662F Java \u865A\u62DF\u673A\u89C4\u8303\u4E2D\u7684\u4E00\u4E2A\u5B9A\u4E49\uFF0C\u4E00\u79CD\u89C4\u8303\u3002</p></blockquote><p>\u6362\u53E5\u8BDD\u8BF4\uFF0C\u65B9\u6CD5\u533A\u548C\u6C38\u4E45\u4EE3\u7684\u5173\u7CFB\u5C31\u50CF\u662F Java \u4E2D\u63A5\u53E3\u548C\u7C7B\u7684\u5173\u7CFB\uFF0C\u7C7B\u5B9E\u73B0\u4E86\u63A5\u53E3\u3002</p>',16),K=a("\u5728\u65B9\u6CD5\u533A\u4E2D\uFF0C\u8FD8\u6709\u4E00\u5757\u975E\u5E38\u91CD\u8981\u7684\u90E8\u5206\uFF0C\u4E5F\u5C31\u662F\u8FD0\u884C\u65F6\u5E38\u91CF\u6C60\u3002\u5728\u8BB2 "),T={href:"https://mp.weixin.qq.com/s/uMEZ2Xwctx4n-_8zvtDp5A",target:"_blank",rel:"noopener noreferrer"},y=a("class \u6587\u4EF6"),z=a("\u7684\u65F6\u5019\uFF0C\u63D0\u5230\u4E86\u6BCF\u4E2A class \u6587\u4EF6\u90FD\u4F1A\u6709\u4E2A\u5E38\u91CF\u6C60\uFF0C\u7528\u6765\u5B58\u653E\u5B57\u7B26\u4E32\u5E38\u91CF\u3001\u7C7B\u548C\u63A5\u53E3\u7684\u540D\u5B57\u3001\u5B57\u6BB5\u540D\u3001\u5E38\u91CF\u7B49\u7B49\u3002\u8FD0\u884C\u65F6\u5E38\u91CF\u6C60\u548C class \u6587\u4EF6\u7684\u5E38\u91CF\u6C60\u662F\u4E00\u4E00\u5BF9\u5E94\u7684\uFF0C\u5B83\u5C31\u662F\u901A\u8FC7 class \u6587\u4EF6\u4E2D\u7684\u5E38\u91CF\u6C60\u6765\u6784\u5EFA\u7684\u3002"),P=e("p",null,"JDK 7 \u4E4B\u524D\uFF0C\u8FD0\u884C\u65F6\u5E38\u91CF\u6C60\u4E2D\u5305\u542B\u7740\u5B57\u7B26\u4E32\u5E38\u91CF\u6C60\uFF0C\u90FD\u5728\u65B9\u6CD5\u533A\u3002",-1),B=e("p",null,"JDK 7 \u7684\u65F6\u5019\uFF0C\u5B57\u7B26\u4E32\u5E38\u91CF\u6C60\u4ECE\u65B9\u6CD5\u533A\u4E2D\u62FF\u51FA\u6765\u653E\u5230\u4E86\u5806\u4E2D\uFF0C\u8FD0\u884C\u65F6\u5E38\u91CF\u6C60\u4E2D\u7684\u5176\u4ED6\u4E1C\u897F\u8FD8\u5728\u65B9\u6CD5\u533A\u4E2D\u3002",-1),G=e("p",null,"JDK 8 \u7684\u65F6\u5019\uFF0CHotSpot \u79FB\u9664\u4E86\u6C38\u4E45\u4EE3\uFF0C\u4E5F\u5C31\u662F\u8BF4\u65B9\u6CD5\u533A\u4E0D\u5B58\u5728\u4E86\uFF0C\u53D6\u800C\u4EE3\u4E4B\u7684\u662F\u5143\u7A7A\u95F4\u3002\u4E5F\u5C31\u610F\u5473\u7740\u5B57\u7B26\u4E32\u5E38\u91CF\u6C60\u5728\u5806\u4E2D\uFF0C\u8FD0\u884C\u65F6\u5E38\u91CF\u6C60\u8DD1\u5230\u4E86\u5143\u7A7A\u95F4\u3002",-1),L=e("p",null,"\u518D\u6765\u8BF4\u8BF4\u4E3A\u4EC0\u4E48\u8981\u5C06\u6C38\u4E45\u4EE3 (PermGen) \u6216\u8005\u8BF4\u65B9\u6CD5\u533A\u66FF\u6362\u4E3A\u5143\u7A7A\u95F4 (MetaSpace) \u3002",-1),N=e("p",null,"\u7B2C\u4E00\uFF0C\u6C38\u4E45\u4EE3\u653E\u5728 Java \u865A\u62DF\u673A\u4E2D\uFF0C\u5C31\u4F1A\u53D7\u5230 Java \u865A\u62DF\u673A\u5185\u5B58\u5927\u5C0F\u7684\u9650\u5236\uFF0C\u800C\u5143\u7A7A\u95F4\u4F7F\u7528\u7684\u662F\u672C\u5730\u5185\u5B58\uFF0C\u4E5F\u5C31\u8131\u79BB\u4E86 Java \u865A\u62DF\u673A\u5185\u5B58\u7684\u9650\u5236\u3002",-1),U=e("p",null,"\u7B2C\u4E8C\uFF0CJDK 8 \u7684\u65F6\u5019\uFF0C\u5728 HotSpot \u4E2D\u878D\u5408\u4E86 JRockit \u865A\u62DF\u673A\uFF0C\u800C JRockit \u4E2D\u5E76\u6CA1\u6709\u6C38\u4E45\u4EE3\u7684\u6982\u5FF5\uFF0C\u56E0\u6B64\u65B0\u7684 HotSpot \u5C31\u6CA1\u6709\u5FC5\u8981\u518D\u5F00\u8F9F\u4E00\u5757\u7A7A\u95F4\u6765\u4F5C\u4E3A\u6C38\u4E45\u4EE3\u4E86\u3002",-1),A=e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png"},null,-1);function R(Z,X){const t=r("ExternalLinkIcon");return i(),c("div",null,[_,p,d,h,u,v,e("ul",null,[J,m,f,e("li",null,[b,e("a",g,[j,o(t)])]),x,M,V]),C,e("p",null,[k,e("a",E,[S,o(t)]),O]),q,D,e("p",null,[e("a",H,[w,o(t)])]),I,e("p",null,[K,e("a",T,[y,o(t)]),z]),P,B,G,L,N,U,A])}var Q=s(l,[["render",R],["__file","neicun-jiegou.html.vue"]]);export{Q as default};
+import{_ as s}from"./plugin-vue_export-helper.21dcd24c.js";import{r,o as i,c,a as e,b as o,d as a,e as n}from"./app.615e41d8.js";const l={},_=e("h1",{id:"\u6DF1\u5165\u7406\u89E3jvm\u7684\u5185\u5B58\u7ED3\u6784",tabindex:"-1"},[e("a",{class:"header-anchor",href:"#\u6DF1\u5165\u7406\u89E3jvm\u7684\u5185\u5B58\u7ED3\u6784","aria-hidden":"true"},"#"),a(" \u6DF1\u5165\u7406\u89E3JVM\u7684\u5185\u5B58\u7ED3\u6784")],-1),p=e("p",null,"\u5728\u8C08 JVM \u5185\u5B58\u533A\u57DF\u5212\u5206\u4E4B\u524D\uFF0C\u6211\u4EEC\u5148\u6765\u770B\u4E00\u4E0B Java \u7A0B\u5E8F\u7684\u5177\u4F53\u6267\u884C\u8FC7\u7A0B\uFF0C\u6211\u753B\u4E86\u4E00\u5E45\u56FE\u3002",-1),d=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/neicun-jiegou-dac0f4c1-8a7e-4309-a599-5664cdaf5016.png",alt:""})],-1),h=e("p",null,"Java \u6E90\u4EE3\u7801\u6587\u4EF6\u7ECF\u8FC7\u7F16\u8BD1\u5668\u7F16\u8BD1\u540E\u751F\u6210\u5B57\u8282\u7801\u6587\u4EF6\uFF0C\u7136\u540E\u4EA4\u7ED9 JVM \u7684\u7C7B\u52A0\u8F7D\u5668\uFF0C\u52A0\u8F7D\u5B8C\u6BD5\u540E\uFF0C\u4EA4\u7ED9\u6267\u884C\u5F15\u64CE\u6267\u884C\u3002\u5728\u6574\u4E2A\u6267\u884C\u7684\u8FC7\u7A0B\u4E2D\uFF0CJVM \u4F1A\u7528\u4E00\u5757\u7A7A\u95F4\u6765\u5B58\u50A8\u7A0B\u5E8F\u6267\u884C\u671F\u95F4\u9700\u8981\u7528\u5230\u7684\u6570\u636E\uFF0C\u8FD9\u5757\u7A7A\u95F4\u4E00\u822C\u88AB\u79F0\u4E3A\u8FD0\u884C\u65F6\u6570\u636E\u533A\uFF0C\u4E5F\u5C31\u662F\u5E38\u8BF4\u7684 JVM \u5185\u5B58\u3002",-1),u=e("p",null,"\u6240\u4EE5\uFF0C\u5F53\u6211\u4EEC\u5728\u8C08 JVM \u5185\u5B58\u533A\u57DF\u5212\u5206\u7684\u65F6\u5019\uFF0C\u5176\u5B9E\u8C08\u7684\u5C31\u662F\u8FD9\u5757\u7A7A\u95F4\u2014\u2014\u8FD0\u884C\u65F6\u6570\u636E\u533A\u3002",-1),v=e("p",null,"\u5927\u5BB6\u5E94\u8BE5\u5BF9\u5B98\u65B9\u51FA\u54C1\u7684\u300AJava \u865A\u62DF\u673A\u89C4\u8303\u300B\u6709\u6240\u4E86\u89E3\u5427\uFF1F\u4E86\u89E3\u8FD9\u4E2A\u89C4\u8303\u53EF\u4EE5\u8BA9\u6211\u4EEC\u66F4\u6DF1\u5165\u5730\u7406\u89E3 JVM\u3002\u8BE5\u89C4\u8303\u4E3B\u8981\u5305\u542B 6 \u4E2A\u90E8\u5206\uFF0C\u5206\u522B\u662F\uFF1A",-1),J=e("li",null,"\u7B2C\u4E00\u7AE0\uFF1A\u5F15\u8A00",-1),m=e("li",null,"\u7B2C\u4E8C\u7AE0\uFF1AJava \u865A\u62DF\u673A\u7ED3\u6784",-1),f=e("li",null,"\u7B2C\u4E09\u7AE0\uFF1AJava \u865A\u62DF\u673A\u7F16\u8BD1",-1),b=a("\u7B2C\u56DB\u7AE0\uFF1A"),g={href:"https://mp.weixin.qq.com/s/uMEZ2Xwctx4n-_8zvtDp5A",target:"_blank",rel:"noopener noreferrer"},j=a("Class \u6587\u4EF6"),x=e("li",null,"\u7B2C\u4E94\u7AE0\uFF1A\u52A0\u8F7D\u3001\u94FE\u63A5\u548C\u521D\u59CB\u5316",-1),M=e("li",null,"\u7B2C\u516D\u7AE0\uFF1AJava \u865A\u62DF\u673A\u6307\u4EE4\u96C6",-1),V=e("li",null,"\u7B2C\u4E03\u7AE0\uFF1A\u64CD\u4F5C\u7801",-1),C=n('<p>\u6839\u636E\u7B2C\u4E8C\u7AE0 Java \u865A\u62DF\u673A\u7ED3\u6784\u4E2D\u7684\u89C4\u5B9A\uFF0C\u8FD0\u884C\u65F6\u6570\u636E\u533A\u53EF\u4EE5\u5206\u4E3A\u4EE5\u4E0B\u51E0\u4E2A\u90E8\u5206\uFF0C\u89C1\u4E0B\u56FE\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/neicun-jiegou-e33179f3-275b-44c9-87f6-802198f8f360.png" alt=""></p><h3 id="_01\u3001\u7A0B\u5E8F\u8BA1\u6570\u5668" tabindex="-1"><a class="header-anchor" href="#_01\u3001\u7A0B\u5E8F\u8BA1\u6570\u5668" aria-hidden="true">#</a> 01\u3001\u7A0B\u5E8F\u8BA1\u6570\u5668</h3><p>\u7A0B\u5E8F\u8BA1\u6570\u5668\uFF08Program Counter Register\uFF09\u6240\u5360\u7684\u5185\u5B58\u7A7A\u95F4\u4E0D\u5927\uFF0C\u5F88\u5C0F\u4E00\u5757\uFF0C\u53EF\u4EE5\u770B\u4F5C\u662F\u5F53\u524D\u7EBF\u7A0B\u6240\u6267\u884C\u7684\u5B57\u8282\u7801\u6307\u4EE4\u7684\u884C\u53F7\u6307\u793A\u5668\u3002\u5B57\u8282\u7801\u89E3\u91CA\u5668\u4F1A\u5728\u5DE5\u4F5C\u7684\u65F6\u5019\u6539\u53D8\u8FD9\u4E2A\u8BA1\u6570\u5668\u7684\u503C\u6765\u9009\u53D6\u4E0B\u4E00\u6761\u9700\u8981\u6267\u884C\u7684\u5B57\u8282\u7801\u6307\u4EE4\uFF0C\u50CF\u5206\u652F\u3001\u5FAA\u73AF\u3001\u8DF3\u8F6C\u3001\u5F02\u5E38\u5904\u7406\u3001\u7EBF\u7A0B\u6062\u590D\u7B49\u529F\u80FD\u90FD\u9700\u8981\u4F9D\u8D56\u8FD9\u4E2A\u8BA1\u6570\u5668\u6765\u5B8C\u6210\u3002</p><p>\u5728 JVM \u4E2D\uFF0C\u591A\u7EBF\u7A0B\u662F\u901A\u8FC7\u7EBF\u7A0B\u8F6E\u6D41\u5207\u6362\u6765\u83B7\u5F97 CPU \u6267\u884C\u65F6\u95F4\u7684\uFF0C\u56E0\u6B64\uFF0C\u5728\u4EFB\u4E00\u5177\u4F53\u65F6\u523B\uFF0C\u4E00\u4E2A CPU \u7684\u5185\u6838\u53EA\u4F1A\u6267\u884C\u4E00\u6761\u7EBF\u7A0B\u4E2D\u7684\u6307\u4EE4\uFF0C\u56E0\u6B64\uFF0C\u4E3A\u4E86\u7EBF\u7A0B\u5207\u6362\u540E\u80FD\u6062\u590D\u5230\u6B63\u786E\u7684\u6267\u884C\u4F4D\u7F6E\uFF0C\u6BCF\u4E2A\u7EBF\u7A0B\u90FD\u9700\u8981\u6709\u4E00\u4E2A\u72EC\u7ACB\u7684\u7A0B\u5E8F\u8BA1\u6570\u5668\uFF0C\u5E76\u4E14\u4E0D\u80FD\u4E92\u76F8\u5E72\u6270\uFF0C\u5426\u5219\u5C31\u4F1A\u5F71\u54CD\u5230\u7A0B\u5E8F\u7684\u6B63\u5E38\u6267\u884C\u6B21\u5E8F\u3002</p><p>\u4E5F\u5C31\u662F\u8BF4\uFF0C\u6211\u4EEC\u8981\u6C42\u7A0B\u5E8F\u8BA1\u6570\u5668\u662F\u7EBF\u7A0B\u79C1\u6709\u7684\u3002</p><p>\u300AJava \u865A\u62DF\u673A\u89C4\u8303\u300B\u4E2D\u89C4\u5B9A\uFF0C\u5982\u679C\u7EBF\u7A0B\u6267\u884C\u7684\u662F\u975E\u672C\u5730\uFF08native\uFF09\u65B9\u6CD5\uFF0C\u5219\u7A0B\u5E8F\u8BA1\u6570\u5668\u4E2D\u4FDD\u5B58\u7684\u662F\u5F53\u524D\u9700\u8981\u6267\u884C\u7684\u6307\u4EE4\u5730\u5740\uFF1B\u5982\u679C\u7EBF\u7A0B\u6267\u884C\u7684\u662F\u672C\u5730\u65B9\u6CD5\uFF0C\u5219\u7A0B\u5E8F\u8BA1\u6570\u5668\u4E2D\u7684\u503C\u662F undefined\u3002</p><p>\u4E3A\u4EC0\u4E48\u672C\u5730\u65B9\u6CD5\u5728\u7A0B\u5E8F\u8BA1\u6570\u5668\u4E2D\u7684\u503C\u662F undefined \u7684\uFF1F\u56E0\u4E3A\u672C\u5730\u65B9\u6CD5\u5927\u591A\u662F\u901A\u8FC7 C/C++ \u5B9E\u73B0\u7684\uFF0C\u5E76\u672A\u7F16\u8BD1\u6210\u9700\u8981\u6267\u884C\u7684\u5B57\u8282\u7801\u6307\u4EE4\u3002</p><p>\u7531\u4E8E\u7A0B\u5E8F\u8BA1\u6570\u5668\u4E2D\u5B58\u50A8\u7684\u6570\u636E\u6240\u5360\u7684\u7A7A\u95F4\u4E0D\u4F1A\u968F\u7A0B\u5E8F\u7684\u6267\u884C\u800C\u53D1\u751F\u5927\u5C0F\u4E0A\u7684\u6539\u53D8\uFF0C\u56E0\u6B64\uFF0C\u7A0B\u5E8F\u8BA1\u6570\u5668\u662F\u4E0D\u4F1A\u53D1\u751F\u5185\u5B58\u6EA2\u51FA\u73B0\u8C61\uFF08OutOfMemory\uFF09\u7684\u3002</p><h3 id="_02\u3001java-\u865A\u62DF\u673A\u6808" tabindex="-1"><a class="header-anchor" href="#_02\u3001java-\u865A\u62DF\u673A\u6808" aria-hidden="true">#</a> 02\u3001Java \u865A\u62DF\u673A\u6808</h3>',10),k=a("Java \u865A\u62DF\u673A\u6808\u4E2D\u662F\u4E00\u4E2A\u4E2A\u6808\u5E27\uFF0C\u6BCF\u4E2A\u6808\u5E27\u5BF9\u5E94\u4E00\u4E2A\u88AB\u8C03\u7528\u7684\u65B9\u6CD5\u3002\u5F53\u7EBF\u7A0B\u6267\u884C\u4E00\u4E2A\u65B9\u6CD5\u65F6\uFF0C\u4F1A\u521B\u5EFA\u4E00\u4E2A\u5BF9\u5E94\u7684\u6808\u5E27\uFF0C\u5E76\u5C06\u6808\u5E27\u538B\u5165\u6808\u4E2D\u3002\u5F53\u65B9\u6CD5\u6267\u884C\u5B8C\u6BD5\u540E\uFF0C\u5C06\u6808\u5E27\u4ECE\u6808\u4E2D\u79FB\u9664\u3002"),E={href:"https://mp.weixin.qq.com/s/fc48Z5tSMlBHweYIS1UL0g",target:"_blank",rel:"noopener noreferrer"},S=a("\u6808"),O=a("\u9075\u5FAA\u7684\u662F\u540E\u8FDB\u5148\u51FA\u7684\u539F\u5219\uFF0C\u6240\u4EE5\u7EBF\u7A0B\u5F53\u524D\u6267\u884C\u7684\u65B9\u6CD5\u5BF9\u5E94\u7684\u6808\u5E27\u5FC5\u5B9A\u5728 Java \u865A\u62DF\u673A\u6808\u7684\u9876\u90E8\u3002"),q=e("p",null,"\u6808\u5E27\u5305\u542B\u4EE5\u4E0B 5 \u4E2A\u90E8\u5206\uFF0C\u89C1\u4E0B\u56FE\u3002",-1),D=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/neicun-jiegou-4ea2a60a-05df-4ed1-8109-99ae23acefd1.png",alt:""})],-1),H={href:"https://tobebetterjavaer.com/jvm/how-jvm-run-zijiema-zhiling.md",target:"_blank",rel:"noopener noreferrer"},w=a("Java \u865A\u62DF\u673A\u6808"),I=n('<h3 id="_04\u3001\u5806" tabindex="-1"><a class="header-anchor" href="#_04\u3001\u5806" aria-hidden="true">#</a> 04\u3001\u5806</h3><p>\u5806\u662F\u6240\u6709\u7EBF\u7A0B\u5171\u4EAB\u7684\u4E00\u5757\u5185\u5B58\u533A\u57DF\uFF0C\u5728 Java \u865A\u62DF\u673A\u542F\u52A8\u7684\u65F6\u5019\u521B\u5EFA\uFF0C\u7528\u6765\u5B58\u50A8\u5BF9\u8C61\uFF08\u6570\u7EC4\u4E5F\u662F\u4E00\u79CD\u5BF9\u8C61\uFF09\u3002</p><p>\u4EE5\u524D\uFF0CJava \u4E2D\u201C\u51E0\u4E4E\u201D\u6240\u6709\u7684\u5BF9\u8C61\u90FD\u4F1A\u5728\u5806\u4E2D\u5206\u914D\uFF0C\u4F46\u968F\u7740 JIT\uFF08Just-In-Time\uFF09\u7F16\u8BD1\u5668\u7684\u53D1\u5C55\u548C\u9003\u9038\u6280\u672F\u7684\u9010\u6E10\u6210\u719F\uFF0C\u6240\u6709\u7684\u5BF9\u8C61\u90FD\u5206\u914D\u5230\u5806\u4E0A\u6E10\u6E10\u53D8\u5F97\u4E0D\u90A3\u4E48\u201C\u7EDD\u5BF9\u201D\u4E86\u3002\u4ECE JDK 7 \u5F00\u59CB\uFF0CJava \u865A\u62DF\u673A\u5DF2\u7ECF\u9ED8\u8BA4\u5F00\u542F\u9003\u9038\u5206\u6790\u4E86\uFF0C\u610F\u5473\u7740\u5982\u679C\u67D0\u4E9B\u65B9\u6CD5\u4E2D\u7684\u5BF9\u8C61\u5F15\u7528\u6CA1\u6709\u88AB\u8FD4\u56DE\u6216\u8005\u672A\u88AB\u5916\u9762\u4F7F\u7528\uFF08\u4E5F\u5C31\u662F\u672A\u9003\u9038\u51FA\u53BB\uFF09\uFF0C\u90A3\u4E48\u5BF9\u8C61\u53EF\u4EE5\u76F4\u63A5\u5728\u6808\u4E0A\u5206\u914D\u5185\u5B58\u3002</p><p>\u7B80\u5355\u89E3\u91CA\u4E00\u4E0B JIT \u548C\u9003\u9038\u5206\u6790\u3002</p><p>\u5E38\u89C1\u7684\u7F16\u8BD1\u578B\u8BED\u8A00\u5982 C++\uFF0C\u901A\u5E38\u4F1A\u628A\u4EE3\u7801\u76F4\u63A5\u7F16\u8BD1\u6210 CPU \u6240\u80FD\u7406\u89E3\u7684\u673A\u5668\u7801\u6765\u8FD0\u884C\u3002\u800C Java \u4E3A\u4E86\u5B9E\u73B0\u201C\u4E00\u6B21\u7F16\u8BD1\uFF0C\u5904\u5904\u8FD0\u884C\u201D\u7684\u7279\u6027\uFF0C\u628A\u7F16\u8BD1\u7684\u8FC7\u7A0B\u5206\u6210\u4E24\u90E8\u5206\uFF0C\u9996\u5148\u5B83\u4F1A\u5148\u7531 javac \u7F16\u8BD1\u6210\u901A\u7528\u7684\u4E2D\u95F4\u5F62\u5F0F\u2014\u2014\u5B57\u8282\u7801\uFF0C\u7136\u540E\u518D\u7531\u89E3\u91CA\u5668\u9010\u6761\u5C06\u5B57\u8282\u7801\u89E3\u91CA\u4E3A\u673A\u5668\u7801\u6765\u6267\u884C\u3002\u6240\u4EE5\u5728\u6027\u80FD\u4E0A\uFF0CJava \u53EF\u80FD\u4F1A\u5E72\u4E0D\u8FC7 C++ \u8FD9\u7C7B\u7F16\u8BD1\u578B\u8BED\u8A00\u3002</p><p>\u4E3A\u4E86\u4F18\u5316 Java \u7684\u6027\u80FD \uFF0CJVM \u5728\u89E3\u91CA\u5668\u4E4B\u5916\u5F15\u5165\u4E86 JIT \u7F16\u8BD1\u5668\uFF1A\u5F53\u7A0B\u5E8F\u8FD0\u884C\u65F6\uFF0C\u89E3\u91CA\u5668\u9996\u5148\u53D1\u6325\u4F5C\u7528\uFF0C\u4EE3\u7801\u53EF\u4EE5\u76F4\u63A5\u6267\u884C\u3002\u968F\u7740\u65F6\u95F4\u63A8\u79FB\uFF0C\u5373\u65F6\u7F16\u8BD1\u5668\u9010\u6E10\u53D1\u6325\u4F5C\u7528\uFF0C\u628A\u8D8A\u6765\u8D8A\u591A\u7684\u4EE3\u7801\u7F16\u8BD1\u4F18\u5316\u6210\u672C\u5730\u4EE3\u7801\uFF0C\u6765\u83B7\u53D6\u66F4\u9AD8\u7684\u6267\u884C\u6548\u7387\u3002\u89E3\u91CA\u5668\u8FD9\u65F6\u53EF\u4EE5\u4F5C\u4E3A\u7F16\u8BD1\u8FD0\u884C\u7684\u964D\u7EA7\u624B\u6BB5\uFF0C\u5728\u4E00\u4E9B\u4E0D\u53EF\u9760\u7684\u7F16\u8BD1\u4F18\u5316\u51FA\u73B0\u95EE\u9898\u65F6\uFF0C\u518D\u5207\u6362\u56DE\u89E3\u91CA\u6267\u884C\uFF0C\u4FDD\u8BC1\u7A0B\u5E8F\u53EF\u4EE5\u6B63\u5E38\u8FD0\u884C\u3002</p><p>\u9003\u9038\u5206\u6790\uFF08Escape Analysis\uFF09\uFF0C\u7B80\u5355\u6765\u8BB2\u5C31\u662F\uFF0CHotspot \u865A\u62DF\u673A\u53EF\u4EE5\u5206\u6790\u65B0\u521B\u5EFA\u5BF9\u8C61\u7684\u4F7F\u7528\u8303\u56F4\uFF0C\u5E76\u51B3\u5B9A\u662F\u5426\u5728 Java \u5806\u4E0A\u5206\u914D\u5185\u5B58\u7684\u4E00\u9879\u6280\u672F\u3002</p><p>\u5806\u662F Java \u5783\u573E\u6536\u96C6\u5668\u7BA1\u7406\u7684\u4E3B\u8981\u533A\u57DF\uFF0C\u56E0\u6B64\u4E5F\u88AB\u79F0\u4F5C GC \u5806\uFF08Garbage Collected Heap\uFF09\u3002\u4ECE\u5783\u573E\u56DE\u6536\u7684\u89D2\u5EA6\u6765\u770B\uFF0C\u7531\u4E8E\u5783\u573E\u6536\u96C6\u5668\u57FA\u672C\u90FD\u91C7\u7528\u4E86\u5206\u4EE3\u5783\u573E\u6536\u96C6\u7684\u7B97\u6CD5\uFF0C\u6240\u4EE5\u5806\u8FD8\u53EF\u4EE5\u7EC6\u5206\u4E3A\uFF1A\u65B0\u751F\u4EE3\u548C\u8001\u5E74\u4EE3\u3002\u65B0\u751F\u4EE3\u8FD8\u53EF\u4EE5\u7EC6\u5206\u4E3A\uFF1AEden \u7A7A\u95F4\u3001From Survivor\u3001To Survivor \u7A7A\u95F4\u7B49\u3002\u8FDB\u4E00\u6B65\u5212\u5206\u7684\u76EE\u7684\u662F\u66F4\u597D\u5730\u56DE\u6536\u5185\u5B58\uFF0C\u6216\u8005\u66F4\u5FEB\u5730\u5206\u914D\u5185\u5B58\u3002</p><p>\u5806\u8FD9\u6700\u5BB9\u6613\u51FA\u73B0\u7684\u5C31\u662F OutOfMemoryError \u9519\u8BEF\uFF0C\u5206\u4E3A\u4EE5\u4E0B\u51E0\u79CD\u8868\u73B0\u5F62\u5F0F\uFF1A</p><ul><li><code>OutOfMemoryError: GC Overhead Limit Exceeded</code>\uFF1A\u5F53 JVM \u82B1\u592A\u591A\u65F6\u95F4\u6267\u884C\u5783\u573E\u56DE\u6536\u5E76\u4E14\u53EA\u80FD\u56DE\u6536\u5F88\u5C11\u7684\u5806\u7A7A\u95F4\u65F6\uFF0C\u5C31\u4F1A\u53D1\u751F\u8BE5\u9519\u8BEF\u3002</li><li><code>java.lang.OutOfMemoryError: Java heap space</code>\uFF1A\u5047\u5982\u5728\u521B\u5EFA\u65B0\u7684\u5BF9\u8C61\u65F6, \u5806\u5185\u5B58\u4E2D\u7684\u7A7A\u95F4\u4E0D\u8DB3\u4EE5\u5B58\u653E\u65B0\u521B\u5EFA\u7684\u5BF9\u8C61, \u5C31\u4F1A\u5F15\u53D1\u8BE5\u9519\u8BEF\u3002\u548C\u672C\u673A\u7684\u7269\u7406\u5185\u5B58\u65E0\u5173\uFF0C\u548C\u6211\u4EEC\u914D\u7F6E\u7684\u865A\u62DF\u673A\u5185\u5B58\u5927\u5C0F\u6709\u5173\uFF01</li></ul><h3 id="_05\u3001\u5143\u7A7A\u95F4" tabindex="-1"><a class="header-anchor" href="#_05\u3001\u5143\u7A7A\u95F4" aria-hidden="true">#</a> 05\u3001\u5143\u7A7A\u95F4</h3><p>JDK 8 \u7684\u65F6\u5019\uFF0C\u539F\u6709\u7684\u65B9\u6CD5\u533A\uFF08\u66F4\u51C6\u786E\u7684\u8BF4\u5E94\u8BE5\u662F\u6C38\u4E45\u4EE3\uFF09\u88AB\u5F7B\u5E95\u79FB\u9664\uFF0C\u53D6\u800C\u4EE3\u4E4B\u7684\u662F\u5143\u7A7A\u95F4\u3002</p><p>\u6211\u4EEC\u6765\u8BF4\u8BF4\u65B9\u6CD5\u533A\u5427\u3002\u65B9\u6CD5\u533A\u548C\u5806\u4E00\u6837\uFF0C\u662F\u7EBF\u7A0B\u5171\u4EAB\u7684\u533A\u57DF\uFF0C\u5B83\u7528\u6765\u5B58\u50A8\u5DF2\u7ECF\u88AB Java \u865A\u62DF\u673A\u52A0\u8F7D\u7684\u7C7B\u4FE1\u606F\u3001\u5E38\u91CF\u3001\u9759\u6001\u53D8\u91CF\uFF0C\u4EE5\u53CA\u4FBF\u5668\u7F16\u8BD1\u540E\u7684\u4EE3\u7801\u7B49\u3002</p><p>\u5728\u6709\u4E9B\u5730\u65B9\uFF0C\u65B9\u6CD5\u533A\u4E5F\u88AB\u79F0\u4E3A\u6C38\u4E45\u4EE3\u3002\u4F46\u5176\u5B9E\u4E0D\u80FD\u8FD9\u4E48\u7406\u89E3\u3002</p><blockquote><p>\u300AJava \u865A\u62DF\u673A\u89C4\u8303\u300B\u4E2D\u53EA\u89C4\u5B9A\u4E86\u6709\u65B9\u6CD5\u533A\u8FD9\u4E48\u4E00\u4E2A\u6982\u5FF5\u548C\u5B83\u7684\u4F5C\u7528\uFF0C\u5E76\u6CA1\u6709\u89C4\u5B9A\u5982\u4F55\u53BB\u5B9E\u73B0\u5B83\u3002\u90A3\u4E48\u4E0D\u540C\u7684 Java \u865A\u62DF\u673A\u53EF\u80FD\u5C31\u4F1A\u6709\u4E0D\u540C\u7684\u5B9E\u73B0\u3002\u6C38\u4E45\u4EE3\u662F HotSpot \u5BF9\u65B9\u6CD5\u533A\u7684\u4E00\u79CD\u5B9E\u73B0\u5F62\u5F0F\u3002\u4E5F\u5C31\u662F\u8BF4\uFF0C\u6C38\u4E45\u4EE3\u53EA\u662F HotSpot \u4E2D\u7684\u4E00\u4E2A\u6982\u5FF5\uFF0C\u800C\u65B9\u6CD5\u533A\u5219\u662F Java \u865A\u62DF\u673A\u89C4\u8303\u4E2D\u7684\u4E00\u4E2A\u5B9A\u4E49\uFF0C\u4E00\u79CD\u89C4\u8303\u3002</p></blockquote><p>\u6362\u53E5\u8BDD\u8BF4\uFF0C\u65B9\u6CD5\u533A\u548C\u6C38\u4E45\u4EE3\u7684\u5173\u7CFB\u5C31\u50CF\u662F Java \u4E2D\u63A5\u53E3\u548C\u7C7B\u7684\u5173\u7CFB\uFF0C\u7C7B\u5B9E\u73B0\u4E86\u63A5\u53E3\u3002</p>',16),K=a("\u5728\u65B9\u6CD5\u533A\u4E2D\uFF0C\u8FD8\u6709\u4E00\u5757\u975E\u5E38\u91CD\u8981\u7684\u90E8\u5206\uFF0C\u4E5F\u5C31\u662F\u8FD0\u884C\u65F6\u5E38\u91CF\u6C60\u3002\u5728\u8BB2 "),T={href:"https://mp.weixin.qq.com/s/uMEZ2Xwctx4n-_8zvtDp5A",target:"_blank",rel:"noopener noreferrer"},y=a("class \u6587\u4EF6"),z=a("\u7684\u65F6\u5019\uFF0C\u63D0\u5230\u4E86\u6BCF\u4E2A class \u6587\u4EF6\u90FD\u4F1A\u6709\u4E2A\u5E38\u91CF\u6C60\uFF0C\u7528\u6765\u5B58\u653E\u5B57\u7B26\u4E32\u5E38\u91CF\u3001\u7C7B\u548C\u63A5\u53E3\u7684\u540D\u5B57\u3001\u5B57\u6BB5\u540D\u3001\u5E38\u91CF\u7B49\u7B49\u3002\u8FD0\u884C\u65F6\u5E38\u91CF\u6C60\u548C class \u6587\u4EF6\u7684\u5E38\u91CF\u6C60\u662F\u4E00\u4E00\u5BF9\u5E94\u7684\uFF0C\u5B83\u5C31\u662F\u901A\u8FC7 class \u6587\u4EF6\u4E2D\u7684\u5E38\u91CF\u6C60\u6765\u6784\u5EFA\u7684\u3002"),P=e("p",null,"JDK 7 \u4E4B\u524D\uFF0C\u8FD0\u884C\u65F6\u5E38\u91CF\u6C60\u4E2D\u5305\u542B\u7740\u5B57\u7B26\u4E32\u5E38\u91CF\u6C60\uFF0C\u90FD\u5728\u65B9\u6CD5\u533A\u3002",-1),B=e("p",null,"JDK 7 \u7684\u65F6\u5019\uFF0C\u5B57\u7B26\u4E32\u5E38\u91CF\u6C60\u4ECE\u65B9\u6CD5\u533A\u4E2D\u62FF\u51FA\u6765\u653E\u5230\u4E86\u5806\u4E2D\uFF0C\u8FD0\u884C\u65F6\u5E38\u91CF\u6C60\u4E2D\u7684\u5176\u4ED6\u4E1C\u897F\u8FD8\u5728\u65B9\u6CD5\u533A\u4E2D\u3002",-1),G=e("p",null,"JDK 8 \u7684\u65F6\u5019\uFF0CHotSpot \u79FB\u9664\u4E86\u6C38\u4E45\u4EE3\uFF0C\u4E5F\u5C31\u662F\u8BF4\u65B9\u6CD5\u533A\u4E0D\u5B58\u5728\u4E86\uFF0C\u53D6\u800C\u4EE3\u4E4B\u7684\u662F\u5143\u7A7A\u95F4\u3002\u4E5F\u5C31\u610F\u5473\u7740\u5B57\u7B26\u4E32\u5E38\u91CF\u6C60\u5728\u5806\u4E2D\uFF0C\u8FD0\u884C\u65F6\u5E38\u91CF\u6C60\u8DD1\u5230\u4E86\u5143\u7A7A\u95F4\u3002",-1),L=e("p",null,"\u518D\u6765\u8BF4\u8BF4\u4E3A\u4EC0\u4E48\u8981\u5C06\u6C38\u4E45\u4EE3 (PermGen) \u6216\u8005\u8BF4\u65B9\u6CD5\u533A\u66FF\u6362\u4E3A\u5143\u7A7A\u95F4 (MetaSpace) \u3002",-1),N=e("p",null,"\u7B2C\u4E00\uFF0C\u6C38\u4E45\u4EE3\u653E\u5728 Java \u865A\u62DF\u673A\u4E2D\uFF0C\u5C31\u4F1A\u53D7\u5230 Java \u865A\u62DF\u673A\u5185\u5B58\u5927\u5C0F\u7684\u9650\u5236\uFF0C\u800C\u5143\u7A7A\u95F4\u4F7F\u7528\u7684\u662F\u672C\u5730\u5185\u5B58\uFF0C\u4E5F\u5C31\u8131\u79BB\u4E86 Java \u865A\u62DF\u673A\u5185\u5B58\u7684\u9650\u5236\u3002",-1),U=e("p",null,"\u7B2C\u4E8C\uFF0CJDK 8 \u7684\u65F6\u5019\uFF0C\u5728 HotSpot \u4E2D\u878D\u5408\u4E86 JRockit \u865A\u62DF\u673A\uFF0C\u800C JRockit \u4E2D\u5E76\u6CA1\u6709\u6C38\u4E45\u4EE3\u7684\u6982\u5FF5\uFF0C\u56E0\u6B64\u65B0\u7684 HotSpot \u5C31\u6CA1\u6709\u5FC5\u8981\u518D\u5F00\u8F9F\u4E00\u5757\u7A7A\u95F4\u6765\u4F5C\u4E3A\u6C38\u4E45\u4EE3\u4E86\u3002",-1),A=e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png"},null,-1);function R(Z,X){const t=r("ExternalLinkIcon");return i(),c("div",null,[_,p,d,h,u,v,e("ul",null,[J,m,f,e("li",null,[b,e("a",g,[j,o(t)])]),x,M,V]),C,e("p",null,[k,e("a",E,[S,o(t)]),O]),q,D,e("p",null,[e("a",H,[w,o(t)])]),I,e("p",null,[K,e("a",T,[y,o(t)]),z]),P,B,G,L,N,U,A])}var Q=s(l,[["render",R],["__file","neicun-jiegou.html.vue"]]);export{Q as default};
diff --git a/dist/assets/nginx-setting.html.3934a533.js b/dist/assets/nginx-setting.html.3934a533.js
new file mode 100644
index 00000000..39cc900b
--- /dev/null
+++ b/dist/assets/nginx-setting.html.3934a533.js
@@ -0,0 +1,108 @@
+import{_ as e}from"./plugin-vue_export-helper.21dcd24c.js";import{o,c as r,a as n}from"./app.615e41d8.js";const t={},i=n("p",null,"user www www; worker_processes auto; error_log /www/wwwlogs/nginx_error.log crit; pid /www/server/nginx/logs/nginx.pid; worker_rlimit_nofile 51200;",-1),_=n("p",null,"events { use epoll; worker_connections 51200; multi_accept on; }",-1),s=n("p",null,"http { include mime.types; #include luawaf.conf;",-1),a=n("pre",null,[n("code",null,`    include proxy.conf;
+
+    default_type  application/octet-stream;
+
+    server_names_hash_bucket_size 512;
+    client_header_buffer_size 32k;
+    large_client_header_buffers 4 32k;
+    client_max_body_size 50m;
+
+    sendfile   on;
+    tcp_nopush on;
+
+    keepalive_timeout 60;
+
+    tcp_nodelay on;
+
+    fastcgi_connect_timeout 300;
+    fastcgi_send_timeout 300;
+    fastcgi_read_timeout 300;
+    fastcgi_buffer_size 64k;
+    fastcgi_buffers 4 64k;
+    fastcgi_busy_buffers_size 128k;
+    fastcgi_temp_file_write_size 256k;
+    fastcgi_intercept_errors on;
+
+    gzip on; # \u5F00\u542FGzip
+    gzip_static on; # \u5F00\u542F\u9759\u6001\u6587\u4EF6\u538B\u7F29
+    gzip_min_length  1k; # \u4E0D\u538B\u7F29\u4E34\u754C\u503C\uFF0C\u5927\u4E8E1K\u7684\u624D\u538B\u7F29
+    gzip_buffers     4 16k;
+    gzip_http_version 1.1;
+    gzip_comp_level 2;
+    gzip_types     text/plain application/javascript application/x-javascript text/javascript text/css application/xml;
+    gzip_vary on;
+    gzip_proxied   expired no-cache no-store private auth;
+    gzip_disable   "MSIE [1-6]\\.";
+
+    limit_conn_zone $binary_remote_addr zone=perip:10m;
+    limit_conn_zone $server_name zone=perserver:10m;
+
+    server_tokens off;
+    access_log off;
+    
+upstream codingmore_web_pool{
+    server 127.0.0.1:8081;
+}
+
+upstream codingmore_admin_pool{
+    server 127.0.0.1:9002;
+}
+
+server {
+    listen       80;
+    server_name  codingmore.top;
+    access_log /home/www/codingmore_web.log;
+    error_log /home/www/codingmore_web.error;
+
+    location /admin/ {
+        alias /www/wwwroot/itwanger/dist/; # \u6839\u76EE\u5F55
+        index index.html;
+    }
+
+    location /api/ {
+        proxy_set_header Host $host;
+        proxy_set_header X-Forwarded-For  $proxy_add_x_forwarded_for;
+        proxy_pass http://codingmore_admin_pool/;
+    }
+    
+    #\u5C06\u6240\u6709\u8BF7\u6C42\u8F6C\u53D1\u7ED9pool\u6C60\u7684\u5E94\u7528\u5904\u7406
+    location / {
+        proxy_set_header Host $host;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_pass http://codingmore_web_pool;
+    }
+}
+
+server
+    {
+    listen 888;
+    server_name phpmyadmin;
+    index index.html index.htm index.php;
+    root  /www/server/phpmyadmin;
+        location ~ /tmp/ {
+            return 403;
+        }
+
+    #error_page   404   /404.html;
+    include enable-php.conf;
+
+    location ~ .*\\.(gif|jpg|jpeg|png|bmp|swf)$
+    {
+        expires      30d;
+    }
+
+    location ~ .*\\.(js|css)?$
+    {
+        expires      12h;
+    }
+
+    location ~ /\\.
+    {
+        deny all;
+    }
+
+    access_log  /www/wwwlogs/access.log;
+}
+
+include /www/server/panel/vhost/nginx/*.conf;
+`)],-1),p=n("p",null,"}",-1),c=[i,_,s,a,p];function l(d,m){return o(),r("div",null,c)}var f=e(t,[["render",l],["__file","nginx-setting.html.vue"]]);export{f as default};
diff --git a/dist/assets/nginx-setting.html.68b3250b.js b/dist/assets/nginx-setting.html.68b3250b.js
new file mode 100644
index 00000000..860d75c9
--- /dev/null
+++ b/dist/assets/nginx-setting.html.68b3250b.js
@@ -0,0 +1 @@
+const e={key:"v-b04aa828",path:"/nice-article/nginx-setting.html",title:"",lang:"zh-CN",frontmatter:{summary:"user www www; worker_processes auto; errorlog /www/wwwlogs/nginxerror.log crit; pid /www/server/nginx/logs/nginx.pid; workerrlimitnofile 51200; events { use epoll; worker_connectio",head:[["meta",{property:"og:url",content:"https://tobebetterjavaer.com/nice-article/nginx-setting.html"}],["meta",{property:"og:site_name",content:"Java \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF"}],["meta",{property:"og:type",content:"article"}],["meta",{property:"og:updated_time",content:"2022-06-10T09:58:21.000Z"}],["meta",{property:"og:locale",content:"zh-CN"}],["meta",{property:"article:modified_time",content:"2022-06-10T09:58:21.000Z"}]]},excerpt:"",headers:[],git:{createdTime:1654855101e3,updatedTime:1654855101e3,contributors:[{name:"itwanger",email:"www.qing_gee@163.com",commits:1}]},readingTime:{minutes:.94,words:281},filePathRelative:"nice-article/nginx-setting.md"};export{e as data};
diff --git a/dist/assets/nginx.html.30b3f8bd.js b/dist/assets/nginx.html.25ed8525.js
similarity index 99%
rename from dist/assets/nginx.html.30b3f8bd.js
rename to dist/assets/nginx.html.25ed8525.js
index a6d4e59a..cbc61104 100644
--- a/dist/assets/nginx.html.30b3f8bd.js
+++ b/dist/assets/nginx.html.25ed8525.js
@@ -1,4 +1,4 @@
-import{_ as a}from"./plugin-vue_export-helper.21dcd24c.js";import{r,o as s,c as l,a as n,b as d,e as i,d as e}from"./app.a0271b9c.js";const o={},c=i('<h1 id="_5\u5206\u949F\u5E26\u4F60\u6DF1\u5165\u6D45\u51FA\u641E\u61C2-nginx" tabindex="-1"><a class="header-anchor" href="#_5\u5206\u949F\u5E26\u4F60\u6DF1\u5165\u6D45\u51FA\u641E\u61C2-nginx" aria-hidden="true">#</a> 5\u5206\u949F\u5E26\u4F60\u6DF1\u5165\u6D45\u51FA\u641E\u61C2 Nginx</h1><p>\u6700\u8FD1\u5728\u642D\u5EFA\u4E00\u4E2A\u7F51\u7AD9\uFF0C\u5C31\u4E0D\u53EF\u907F\u514D\u5730\u8981\u7528\u5230 Nginx\uFF0C\u7D22\u6027\u5C31\u51FA\u4E00\u671F Nginx \u7684\u5165\u95E8\u6559\u7A0B\uFF0C\u5E0C\u671B\u4E5F\u53EF\u4EE5\u5E2E\u52A9\u5230\u5927\u5BB6~\u{1F601}</p><p>\u4F5C\u4E3A\u5F00\u53D1\u8005\uFF0C\u76F8\u4FE1\u5927\u5BB6\u90FD\u77E5\u9053 Nginx \u7684\u91CD\u8981\u6027\u3002Nginx \u662F\u4E00\u4E2A\u9AD8\u6027\u80FD\u7684 HTTP \u548C\u53CD\u5411\u4EE3\u7406 Web \u670D\u52A1\u5668\uFF0C\u7531\u4FC4\u7F57\u65AF\u7684\u4F0A\u6208\u5C14\xB7\u8D5B\u7D22\u8036\u592B\u5F00\u53D1\uFF0C\u7B2C\u4E00\u4E2A\u7248\u672C\u53D1\u5E03\u4E8E 2004 \u5E74 10 \u6708 4 \u65E5\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nginx/nginx-01.png" alt=""></p><p>Nginx \u7684\u7279\u70B9\u662F\uFF1A</p><ul><li>\u5185\u5B58\u5360\u7528\u5C11</li><li>\u5E76\u53D1\u80FD\u529B\u5F3A\uFF08\u53EF\u652F\u6301\u5927\u7EA6 50000 \u4E2A\u5E76\u53D1\u8FDE\u63A5\uFF09</li><li>\u914D\u7F6E\u8D85\u7B80\u6D01</li><li>bug \u975E\u5E38\u5C11</li><li>\u5B89\u88C5\u8D85\u7B80\u5355</li><li>\u670D\u52A1\u7279\u522B\u7A33\uFF08\u51E0\u4E2A\u6708\u4E5F\u4E0D\u9700\u8981\u91CD\u542F\uFF09</li></ul><p>\u57FA\u4E8E\u8FD9\u4E9B\u7279\u70B9\uFF0C\u8D8A\u6765\u8D8A\u591A\u7684\u7F51\u7AD9\u5F00\u59CB\u4F7F\u7528 Nginx\u3002\u4E8E\u662F\uFF0C\u638C\u63E1 Nginx \u5C31\u53D8\u6210\u4E86\u5F00\u53D1\u8005\u7684\u4E00\u9879\u5FC5\u4E0D\u53EF\u5C11\u7684\u6280\u80FD\u3002</p><h3 id="\u4E00\u3001nginx-\u7684\u4F5C\u7528" tabindex="-1"><a class="header-anchor" href="#\u4E00\u3001nginx-\u7684\u4F5C\u7528" aria-hidden="true">#</a> \u4E00\u3001Nginx \u7684\u4F5C\u7528</h3><p><strong>\u53CD\u5411\u4EE3\u7406</strong>\u662F Nginx \u4F5C\u4E3A Web \u670D\u52A1\u5668\u6700\u5E38\u7528\u7684\u529F\u80FD\u4E4B\u4E00\u3002\u4EC0\u4E48\u662F\u53CD\u5411\u4EE3\u7406\u5462\uFF1F\u5F88\u591A\u521D\u5B66\u8005\u5728\u7B2C\u4E00\u6B21\u9047\u5230\u8FD9\u4E2A\u540D\u8BCD\u7684\u65F6\u5019\u603B\u514D\u4E0D\u4E86\u51FA\u73B0\u5F88\u591A\u95EE\u53F7\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nginx/nginx-02.png" alt=""></p><p>\u90A3\u8981\u60F3\u641E\u660E\u767D\u4EC0\u4E48\u662F\u53CD\u5411\u4EE3\u7406\uFF0C\u5C31\u5FC5\u987B\u5F97\u641E\u660E\u767D\u4EC0\u4E48\u662F\u6B63\u5411\u4EE3\u7406\u3002</p><p>\u4E3E\u4E2A\u4F8B\u5B50\uFF0C\u5C0F\u4E8C\u7684\u6D4F\u89C8\u5668\u662F\u65E0\u6CD5\u76F4\u63A5\u8BBF\u95EE\u8C37\u54E5\u7684\uFF0C\u4F46\u9999\u6E2F\u7684\u4EE3\u7406\u670D\u52A1\u5668\u662F\u53EF\u4EE5\u8BBF\u95EE\u8C37\u54E5\u7684\uFF0C\u4E8E\u662F\u5C0F\u4E8C\u8BBF\u95EE\u4E86\u9999\u6E2F\u7684\u4EE3\u7406\u670D\u52A1\u5668\uFF0C\u4E5F\u5C31\u95F4\u63A5\u5730\u8BBF\u95EE\u4E86\u8C37\u54E5\u3002\u90A3\u8FD9\u53F0\u4EE3\u7406\u670D\u52A1\u5668\u4E5F\u5C31\u662F<strong>\u6B63\u5411\u4EE3\u7406</strong>\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nginx/nginx-03.png" alt=""></p><p>\u603B\u7ED3\u4E00\u53E5\u5C31\u662F\uFF0C<strong>\u6B63\u5411\u4EE3\u7406\u662F\u4EE3\u7406\u5BA2\u6237\u7AEF\u7684</strong>\uFF0C\u8BA9\u4F60\u80FD\u6B63\u5E38\u8BBF\u95EE\u76EE\u7684\u670D\u52A1\u5668\u3002</p><p>\u4E0E\u4E4B\u76F8\u53CD\uFF0C<strong>\u53CD\u5411\u4EE3\u7406\u662F\u4EE3\u7406\u670D\u52A1\u5668\u7684</strong>\uFF0C\u8BA9\u5927\u91CF\u7684\u8BF7\u6C42\u5747\u8861\u5730\u8BBF\u95EE\u5230\u67D0\u4E00\u53F0\u670D\u52A1\u5668\u4E0A\u3002</p><p>\u4E3E\u4E2A\u4F8B\u5B50\uFF0C10 \u4E07\u4E2A\u5C0F\u4E8C\u540C\u65F6\u5728\u8BBF\u95EE itwanger.com\uFF0C \u5982\u679C\u53EA\u6709\u4E00\u53F0\u670D\u52A1\u5668\u7684\u8BDD\uFF0C\u5F88\u5BB9\u6613\u5C31\u762B\u75EA\u4E86\uFF0C\u4E8E\u662F\u9AD8\u5E76\u53D1\u7684\u60C5\u51B5\u4E0B\u4F1A\u6709\u5F88\u591A\u53F0\u670D\u52A1\u5668\uFF08\u5047\u5982 10 \u53F0\u5427\uFF09\u6765\u63A5\u8FD9\u4E2A\u6D3B\uFF0C\u90A3\u600E\u4E48\u8BA9 10 \u4E07\u4E2A\u5C0F\u4E8C\u8BBF\u95EE\u5230\u8FD9 10 \u53F0\u670D\u52A1\u5668\u5462\uFF1F</p><p>\u8FD9\u5C31\u9700\u8981\u4E00\u4E2A\u53CD\u5411\u4EE3\u7406\u670D\u52A1\u5668\u4E86\uFF0C\u53CD\u5411\u4EE3\u7406\u670D\u52A1\u5668\u8BA9 1 \u4E07\u4E2A\u5C0F\u4E8C\u8BBF\u95EE\u670D\u52A1\u5668 A\uFF0C1 \u4E07\u4E2A\u5C0F\u4E8C\u8BBF\u95EE\u670D\u52A1\u5668 B\uFF0C1 \u4E2A\u5C0F\u4E8C\u8BBF\u95EE\u670D\u52A1\u5668 C\uFF0C\u8FD9\u6837\u7684\u8BDD\uFF0C\u6BCF\u53F0\u670D\u52A1\u5668\u7684\u538B\u529B\u5C31\u76F8\u5E94\u51CF\u5C0F\u4E86\uFF0C\u662F\u4E0D\u662F\u5F88 nice\uFF1F</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nginx/nginx-04.png" alt=""></p><p>\u90A3\u95EE\u9898\u6765\u4E86\u3002\u6BCF\u53F0\u670D\u52A1\u5668\u7684\u80FD\u529B\u53EF\u80FD\u4E0D\u540C\uFF0C\u6BD4\u5982\u8BF4\u670D\u52A1\u5668 A \u7684\u5185\u5B58\u6BD4\u8F83\u5927\u4E00\u70B9\uFF0C\u6709 100 \u4E2A G\uFF1B\u670D\u52A1\u5668 B \u7684\u5185\u5B58\u5C0F\u4E00\u70B9\uFF0C\u6709 10 \u4E2A G\uFF1B\u670D\u52A1\u5668 C \u7684\u5185\u5B58\u66F4\u5C0F\u4E00\u70B9\uFF0C\u53EA\u6709 1 \u4E2A G\u3002\u600E\u4E48\u624D\u80FD\u8BA9\u6CA1\u53F0\u670D\u52A1\u5668\u627F\u62C5\u8D77\u5B83\u80FD\u529B\u8303\u56F4\u5185\u7684\u8BBF\u95EE\u5462\uFF1F</p><p><strong>Nginx \u5185\u7F6E\u4E86\u8F6E\u8BE2\u548C\u52A0\u6743\u8F6E\u8BE2\u6765\u8FBE\u5230\u8D1F\u8F7D\u5747\u8861\u7684\u76EE\u7684</strong>\u3002\u670D\u52A1\u5668 A \u725B\u903C\u5C31\u628A\u5B83\u7684\u6743\u91CD\u52A0\u5927\u4E00\u70B9\uFF0C\u8BA9 5 \u4E07\u4E2A\u5C0F\u4E8C\u8BBF\u95EE\u5B83\uFF1B\u670D\u52A1\u5668 B \u5F31\u4E00\u70B9\uFF0C\u6743\u91CD\u5C31\u518D\u5C0F\u4E00\u70B9\uFF0C\u8BA9 2 \u4E07\u4E2A\u5C0F\u4E8C\u8BBF\u95EE\u5B83\uFF1B\u670D\u52A1\u5668 C \u66F4\u5F31\uFF0C\u6743\u91CD\u5C31\u6700\u5C0F\uFF0C\u8BA9 1 \u4E07\u4E2A\u5C0F\u4E8C\u8BBF\u95EE\u5B83\u3002</p><p>\u9664\u6B64\u4E4B\u5916\uFF0CNginx \u8FD8\u6709\u4E00\u4E2A\u5F88\u725B\u903C\u7684\u529F\u80FD\u662F<strong>\u52A8\u9759\u5206\u79BB</strong>\u3002</p><p>\u5728\u6211\u4EEC\u7684\u8F6F\u4EF6\u5F00\u53D1\u4E2D\uFF0C\u6709\u4E9B\u8BF7\u6C42\u662F\u9700\u8981\u540E\u53F0\u5904\u7406\u7684\uFF1B\u6709\u4E9B\u8BF7\u6C42\u662F\u4E0D\u9700\u8981\u540E\u53F0\u5904\u7406\u7684\uFF0C\u6BD4\u5982\u8BF4 css\u3001js \u8FD9\u4E9B\u6587\u4EF6\u8BF7\u6C42\uFF0C\u8FD9\u4E9B\u4E0D\u9700\u8981\u7ECF\u8FC7\u540E\u53F0\u5904\u7406\u7684\u6587\u4EF6\u5C31\u53EB\u9759\u6001\u6587\u4EF6\u3002</p><p>\u6211\u4EEC\u53EF\u4EE5\u6839\u636E\u4E00\u4E9B\u89C4\u5219\uFF0C\u628A\u52A8\u6001\u8D44\u6E90\u548C\u9759\u6001\u8D44\u6E90\u5206\u5F00\uFF0C\u7136\u540E\u901A\u8FC7 Nginx \u628A\u8BF7\u6C42\u5206\u5F00\uFF0C\u9759\u6001\u8D44\u6E90\u7684\u8BF7\u6C42\u5C31\u4E0D\u9700\u8981\u7ECF\u8FC7 Web \u670D\u52A1\u5668\u5904\u7406\u4E86\uFF0C\u4ECE\u800C\u63D0\u9AD8\u6574\u4F53\u4E0A\u7684\u8D44\u6E90\u7684\u54CD\u5E94\u901F\u5EA6\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nginx/nginx-05.png" alt=""></p><h3 id="\u4E8C\u3001nginx-\u7684\u5B89\u88C5" tabindex="-1"><a class="header-anchor" href="#\u4E8C\u3001nginx-\u7684\u5B89\u88C5" aria-hidden="true">#</a> \u4E8C\u3001Nginx \u7684\u5B89\u88C5</h3><p>\u9488\u5BF9\u4E0D\u540C\u7684\u64CD\u4F5C\u7CFB\u7EDF\uFF0CNginx \u7684\u5B89\u88C5\u5404\u4E0D\u76F8\u540C\u3002Windows \u53EF\u4EE5\u76F4\u63A5\u5230\u5B98\u7F51\u4E0B\u8F7D zip \u7EFF\u8272\u5B89\u88C5\u5305\uFF0C\u89E3\u538B\u540E\u5C31\u53EF\u4EE5\u4E86\u3002</p><blockquote><p>http://nginx.org/en/download.html</p></blockquote>',27),g=e("\u4E4B\u524D\u5E26\u5927\u5BB6\u767D\u7968\u8FC7\u963F\u91CC\u4E91\u7684\u670D\u52A1\u5668\uFF0C\u6709 Linux \u670D\u52A1\u5668\u7684\u8BDD\uFF0C\u76F4\u63A5\u901A\u8FC7"),p={href:"https://mp.weixin.qq.com/s/ditN9J80rSWwnYRumwb4ww",target:"_blank",rel:"noopener noreferrer"},v=e("\u5B9D\u5854\u9762\u677F"),b=e("\u8FD9\u4E2A\u795E\u5668\u5C31\u53EF\u4EE5\u5B89\u88C5\u4E86\u3002"),m=i(`<p>\u4E0D\u8FC7\uFF0C\u5982\u679C\u5728\u5B89\u88C5\u5B9D\u5854\u9762\u677F\u5FC5\u5907\u5DE5\u5177\u5305\u7684\u65F6\u5019\uFF0C\u5982\u679C\u9009\u62E9\u4E86 phpmyadmin\uFF08MySQL \u7684\u7BA1\u7406\u5DE5\u5177\uFF09\uFF0C\u4F1A\u8986\u76D6\u6389 80 \u7AEF\u53E3\uFF0C\u5C31\u5BFC\u81F4\u6CA1\u529E\u6CD5\u76F4\u63A5\u901A\u8FC7\u9ED8\u8BA4\u914D\u7F6E\u7684\u65B9\u5F0F\u8BBF\u95EE Nginx \u542F\u52A8\u9875\u9762\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nginx/nginx-06.png" alt=""></p><p>\u6211\u8FD9\u91CC\u4EE5 macOS \u73AF\u5883\u4E3A\u4F8B\uFF0C\u6765\u6F14\u793A\u4E00\u4E0B\u3002</p><p>\u7B2C\u4E00\u6B65\uFF0C\u901A\u8FC7 <code>brew info nginx</code> \u547D\u4EE4\u67E5\u770B Nginx \u662F\u5426\u5B89\u88C5\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nginx/nginx-07.png" alt=""></p><p>\u7B2C\u4E8C\u6B65\uFF0C\u901A\u8FC7 <code>brew install nginx</code> \u547D\u4EE4\u5B89\u88C5 Nginx\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nginx/nginx-08.png" alt=""></p><p>\u4ECE\u4EE5\u4E0A\u4FE1\u606F\u53EF\u4EE5\u5F97\u51FA\uFF1A</p><ul><li>\u6839\u76EE\u5F55\u662F <code>/usr/local/var/www</code></li><li>\u914D\u7F6E\u6587\u4EF6\u662F <code>/usr/local/etc/nginx/nginx.conf</code></li><li>\u9ED8\u8BA4\u7AEF\u53E3\u662F 8080</li></ul><p>\u7B2C\u4E09\u6B65\uFF0C\u901A\u8FC7 <code>nginx</code> \u547D\u4EE4\u542F\u52A8 Nginx\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nginx/nginx-09.png" alt=""></p><p>\u7B2C\u56DB\u6B65\uFF0C\u5728\u6D4F\u89C8\u5668\u5730\u5740\u680F\u901A\u8FC7 <code>localhost:8080</code> \u8BBF\u95EE\uFF0C\u53EF\u4EE5\u770B\u5230\u4EE5\u4E0B\u6B22\u8FCE\u9875\u9762\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nginx/nginx-10.png" alt=""></p><h3 id="\u4E09\u3001nginx-\u5E38\u7528\u547D\u4EE4" tabindex="-1"><a class="header-anchor" href="#\u4E09\u3001nginx-\u5E38\u7528\u547D\u4EE4" aria-hidden="true">#</a> \u4E09\u3001Nginx \u5E38\u7528\u547D\u4EE4</h3><p>\u901A\u5E38\u6765\u8BF4\uFF0CNginx \u4E00\u65E6\u542F\u52A8\u540E\uFF0C\u6211\u4EEC\u662F\u5F88\u5C11\u8BA9\u5B83\u9000\u51FA\u7684\uFF0C\u4F7F\u7528\u6700\u591A\u7684\u5C31\u662F reload \u547D\u4EE4\u3002\u5F53\u6211\u4EEC\u4FEE\u6539\u4E86\u914D\u7F6E\u6587\u4EF6\uFF0C\u662F\u9700\u8981\u6267\u884C\u4E00\u6B21 reload \u547D\u4EE4\u8BA9 Nginx \u751F\u6548\u7684\u3002</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>nginx  \u542F\u52A8
+import{_ as a}from"./plugin-vue_export-helper.21dcd24c.js";import{r,o as s,c as l,a as n,b as d,e as i,d as e}from"./app.615e41d8.js";const o={},c=i('<h1 id="_5\u5206\u949F\u5E26\u4F60\u6DF1\u5165\u6D45\u51FA\u641E\u61C2-nginx" tabindex="-1"><a class="header-anchor" href="#_5\u5206\u949F\u5E26\u4F60\u6DF1\u5165\u6D45\u51FA\u641E\u61C2-nginx" aria-hidden="true">#</a> 5\u5206\u949F\u5E26\u4F60\u6DF1\u5165\u6D45\u51FA\u641E\u61C2 Nginx</h1><p>\u6700\u8FD1\u5728\u642D\u5EFA\u4E00\u4E2A\u7F51\u7AD9\uFF0C\u5C31\u4E0D\u53EF\u907F\u514D\u5730\u8981\u7528\u5230 Nginx\uFF0C\u7D22\u6027\u5C31\u51FA\u4E00\u671F Nginx \u7684\u5165\u95E8\u6559\u7A0B\uFF0C\u5E0C\u671B\u4E5F\u53EF\u4EE5\u5E2E\u52A9\u5230\u5927\u5BB6~\u{1F601}</p><p>\u4F5C\u4E3A\u5F00\u53D1\u8005\uFF0C\u76F8\u4FE1\u5927\u5BB6\u90FD\u77E5\u9053 Nginx \u7684\u91CD\u8981\u6027\u3002Nginx \u662F\u4E00\u4E2A\u9AD8\u6027\u80FD\u7684 HTTP \u548C\u53CD\u5411\u4EE3\u7406 Web \u670D\u52A1\u5668\uFF0C\u7531\u4FC4\u7F57\u65AF\u7684\u4F0A\u6208\u5C14\xB7\u8D5B\u7D22\u8036\u592B\u5F00\u53D1\uFF0C\u7B2C\u4E00\u4E2A\u7248\u672C\u53D1\u5E03\u4E8E 2004 \u5E74 10 \u6708 4 \u65E5\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nginx/nginx-01.png" alt=""></p><p>Nginx \u7684\u7279\u70B9\u662F\uFF1A</p><ul><li>\u5185\u5B58\u5360\u7528\u5C11</li><li>\u5E76\u53D1\u80FD\u529B\u5F3A\uFF08\u53EF\u652F\u6301\u5927\u7EA6 50000 \u4E2A\u5E76\u53D1\u8FDE\u63A5\uFF09</li><li>\u914D\u7F6E\u8D85\u7B80\u6D01</li><li>bug \u975E\u5E38\u5C11</li><li>\u5B89\u88C5\u8D85\u7B80\u5355</li><li>\u670D\u52A1\u7279\u522B\u7A33\uFF08\u51E0\u4E2A\u6708\u4E5F\u4E0D\u9700\u8981\u91CD\u542F\uFF09</li></ul><p>\u57FA\u4E8E\u8FD9\u4E9B\u7279\u70B9\uFF0C\u8D8A\u6765\u8D8A\u591A\u7684\u7F51\u7AD9\u5F00\u59CB\u4F7F\u7528 Nginx\u3002\u4E8E\u662F\uFF0C\u638C\u63E1 Nginx \u5C31\u53D8\u6210\u4E86\u5F00\u53D1\u8005\u7684\u4E00\u9879\u5FC5\u4E0D\u53EF\u5C11\u7684\u6280\u80FD\u3002</p><h3 id="\u4E00\u3001nginx-\u7684\u4F5C\u7528" tabindex="-1"><a class="header-anchor" href="#\u4E00\u3001nginx-\u7684\u4F5C\u7528" aria-hidden="true">#</a> \u4E00\u3001Nginx \u7684\u4F5C\u7528</h3><p><strong>\u53CD\u5411\u4EE3\u7406</strong>\u662F Nginx \u4F5C\u4E3A Web \u670D\u52A1\u5668\u6700\u5E38\u7528\u7684\u529F\u80FD\u4E4B\u4E00\u3002\u4EC0\u4E48\u662F\u53CD\u5411\u4EE3\u7406\u5462\uFF1F\u5F88\u591A\u521D\u5B66\u8005\u5728\u7B2C\u4E00\u6B21\u9047\u5230\u8FD9\u4E2A\u540D\u8BCD\u7684\u65F6\u5019\u603B\u514D\u4E0D\u4E86\u51FA\u73B0\u5F88\u591A\u95EE\u53F7\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nginx/nginx-02.png" alt=""></p><p>\u90A3\u8981\u60F3\u641E\u660E\u767D\u4EC0\u4E48\u662F\u53CD\u5411\u4EE3\u7406\uFF0C\u5C31\u5FC5\u987B\u5F97\u641E\u660E\u767D\u4EC0\u4E48\u662F\u6B63\u5411\u4EE3\u7406\u3002</p><p>\u4E3E\u4E2A\u4F8B\u5B50\uFF0C\u5C0F\u4E8C\u7684\u6D4F\u89C8\u5668\u662F\u65E0\u6CD5\u76F4\u63A5\u8BBF\u95EE\u8C37\u54E5\u7684\uFF0C\u4F46\u9999\u6E2F\u7684\u4EE3\u7406\u670D\u52A1\u5668\u662F\u53EF\u4EE5\u8BBF\u95EE\u8C37\u54E5\u7684\uFF0C\u4E8E\u662F\u5C0F\u4E8C\u8BBF\u95EE\u4E86\u9999\u6E2F\u7684\u4EE3\u7406\u670D\u52A1\u5668\uFF0C\u4E5F\u5C31\u95F4\u63A5\u5730\u8BBF\u95EE\u4E86\u8C37\u54E5\u3002\u90A3\u8FD9\u53F0\u4EE3\u7406\u670D\u52A1\u5668\u4E5F\u5C31\u662F<strong>\u6B63\u5411\u4EE3\u7406</strong>\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nginx/nginx-03.png" alt=""></p><p>\u603B\u7ED3\u4E00\u53E5\u5C31\u662F\uFF0C<strong>\u6B63\u5411\u4EE3\u7406\u662F\u4EE3\u7406\u5BA2\u6237\u7AEF\u7684</strong>\uFF0C\u8BA9\u4F60\u80FD\u6B63\u5E38\u8BBF\u95EE\u76EE\u7684\u670D\u52A1\u5668\u3002</p><p>\u4E0E\u4E4B\u76F8\u53CD\uFF0C<strong>\u53CD\u5411\u4EE3\u7406\u662F\u4EE3\u7406\u670D\u52A1\u5668\u7684</strong>\uFF0C\u8BA9\u5927\u91CF\u7684\u8BF7\u6C42\u5747\u8861\u5730\u8BBF\u95EE\u5230\u67D0\u4E00\u53F0\u670D\u52A1\u5668\u4E0A\u3002</p><p>\u4E3E\u4E2A\u4F8B\u5B50\uFF0C10 \u4E07\u4E2A\u5C0F\u4E8C\u540C\u65F6\u5728\u8BBF\u95EE itwanger.com\uFF0C \u5982\u679C\u53EA\u6709\u4E00\u53F0\u670D\u52A1\u5668\u7684\u8BDD\uFF0C\u5F88\u5BB9\u6613\u5C31\u762B\u75EA\u4E86\uFF0C\u4E8E\u662F\u9AD8\u5E76\u53D1\u7684\u60C5\u51B5\u4E0B\u4F1A\u6709\u5F88\u591A\u53F0\u670D\u52A1\u5668\uFF08\u5047\u5982 10 \u53F0\u5427\uFF09\u6765\u63A5\u8FD9\u4E2A\u6D3B\uFF0C\u90A3\u600E\u4E48\u8BA9 10 \u4E07\u4E2A\u5C0F\u4E8C\u8BBF\u95EE\u5230\u8FD9 10 \u53F0\u670D\u52A1\u5668\u5462\uFF1F</p><p>\u8FD9\u5C31\u9700\u8981\u4E00\u4E2A\u53CD\u5411\u4EE3\u7406\u670D\u52A1\u5668\u4E86\uFF0C\u53CD\u5411\u4EE3\u7406\u670D\u52A1\u5668\u8BA9 1 \u4E07\u4E2A\u5C0F\u4E8C\u8BBF\u95EE\u670D\u52A1\u5668 A\uFF0C1 \u4E07\u4E2A\u5C0F\u4E8C\u8BBF\u95EE\u670D\u52A1\u5668 B\uFF0C1 \u4E2A\u5C0F\u4E8C\u8BBF\u95EE\u670D\u52A1\u5668 C\uFF0C\u8FD9\u6837\u7684\u8BDD\uFF0C\u6BCF\u53F0\u670D\u52A1\u5668\u7684\u538B\u529B\u5C31\u76F8\u5E94\u51CF\u5C0F\u4E86\uFF0C\u662F\u4E0D\u662F\u5F88 nice\uFF1F</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nginx/nginx-04.png" alt=""></p><p>\u90A3\u95EE\u9898\u6765\u4E86\u3002\u6BCF\u53F0\u670D\u52A1\u5668\u7684\u80FD\u529B\u53EF\u80FD\u4E0D\u540C\uFF0C\u6BD4\u5982\u8BF4\u670D\u52A1\u5668 A \u7684\u5185\u5B58\u6BD4\u8F83\u5927\u4E00\u70B9\uFF0C\u6709 100 \u4E2A G\uFF1B\u670D\u52A1\u5668 B \u7684\u5185\u5B58\u5C0F\u4E00\u70B9\uFF0C\u6709 10 \u4E2A G\uFF1B\u670D\u52A1\u5668 C \u7684\u5185\u5B58\u66F4\u5C0F\u4E00\u70B9\uFF0C\u53EA\u6709 1 \u4E2A G\u3002\u600E\u4E48\u624D\u80FD\u8BA9\u6CA1\u53F0\u670D\u52A1\u5668\u627F\u62C5\u8D77\u5B83\u80FD\u529B\u8303\u56F4\u5185\u7684\u8BBF\u95EE\u5462\uFF1F</p><p><strong>Nginx \u5185\u7F6E\u4E86\u8F6E\u8BE2\u548C\u52A0\u6743\u8F6E\u8BE2\u6765\u8FBE\u5230\u8D1F\u8F7D\u5747\u8861\u7684\u76EE\u7684</strong>\u3002\u670D\u52A1\u5668 A \u725B\u903C\u5C31\u628A\u5B83\u7684\u6743\u91CD\u52A0\u5927\u4E00\u70B9\uFF0C\u8BA9 5 \u4E07\u4E2A\u5C0F\u4E8C\u8BBF\u95EE\u5B83\uFF1B\u670D\u52A1\u5668 B \u5F31\u4E00\u70B9\uFF0C\u6743\u91CD\u5C31\u518D\u5C0F\u4E00\u70B9\uFF0C\u8BA9 2 \u4E07\u4E2A\u5C0F\u4E8C\u8BBF\u95EE\u5B83\uFF1B\u670D\u52A1\u5668 C \u66F4\u5F31\uFF0C\u6743\u91CD\u5C31\u6700\u5C0F\uFF0C\u8BA9 1 \u4E07\u4E2A\u5C0F\u4E8C\u8BBF\u95EE\u5B83\u3002</p><p>\u9664\u6B64\u4E4B\u5916\uFF0CNginx \u8FD8\u6709\u4E00\u4E2A\u5F88\u725B\u903C\u7684\u529F\u80FD\u662F<strong>\u52A8\u9759\u5206\u79BB</strong>\u3002</p><p>\u5728\u6211\u4EEC\u7684\u8F6F\u4EF6\u5F00\u53D1\u4E2D\uFF0C\u6709\u4E9B\u8BF7\u6C42\u662F\u9700\u8981\u540E\u53F0\u5904\u7406\u7684\uFF1B\u6709\u4E9B\u8BF7\u6C42\u662F\u4E0D\u9700\u8981\u540E\u53F0\u5904\u7406\u7684\uFF0C\u6BD4\u5982\u8BF4 css\u3001js \u8FD9\u4E9B\u6587\u4EF6\u8BF7\u6C42\uFF0C\u8FD9\u4E9B\u4E0D\u9700\u8981\u7ECF\u8FC7\u540E\u53F0\u5904\u7406\u7684\u6587\u4EF6\u5C31\u53EB\u9759\u6001\u6587\u4EF6\u3002</p><p>\u6211\u4EEC\u53EF\u4EE5\u6839\u636E\u4E00\u4E9B\u89C4\u5219\uFF0C\u628A\u52A8\u6001\u8D44\u6E90\u548C\u9759\u6001\u8D44\u6E90\u5206\u5F00\uFF0C\u7136\u540E\u901A\u8FC7 Nginx \u628A\u8BF7\u6C42\u5206\u5F00\uFF0C\u9759\u6001\u8D44\u6E90\u7684\u8BF7\u6C42\u5C31\u4E0D\u9700\u8981\u7ECF\u8FC7 Web \u670D\u52A1\u5668\u5904\u7406\u4E86\uFF0C\u4ECE\u800C\u63D0\u9AD8\u6574\u4F53\u4E0A\u7684\u8D44\u6E90\u7684\u54CD\u5E94\u901F\u5EA6\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nginx/nginx-05.png" alt=""></p><h3 id="\u4E8C\u3001nginx-\u7684\u5B89\u88C5" tabindex="-1"><a class="header-anchor" href="#\u4E8C\u3001nginx-\u7684\u5B89\u88C5" aria-hidden="true">#</a> \u4E8C\u3001Nginx \u7684\u5B89\u88C5</h3><p>\u9488\u5BF9\u4E0D\u540C\u7684\u64CD\u4F5C\u7CFB\u7EDF\uFF0CNginx \u7684\u5B89\u88C5\u5404\u4E0D\u76F8\u540C\u3002Windows \u53EF\u4EE5\u76F4\u63A5\u5230\u5B98\u7F51\u4E0B\u8F7D zip \u7EFF\u8272\u5B89\u88C5\u5305\uFF0C\u89E3\u538B\u540E\u5C31\u53EF\u4EE5\u4E86\u3002</p><blockquote><p>http://nginx.org/en/download.html</p></blockquote>',27),g=e("\u4E4B\u524D\u5E26\u5927\u5BB6\u767D\u7968\u8FC7\u963F\u91CC\u4E91\u7684\u670D\u52A1\u5668\uFF0C\u6709 Linux \u670D\u52A1\u5668\u7684\u8BDD\uFF0C\u76F4\u63A5\u901A\u8FC7"),p={href:"https://mp.weixin.qq.com/s/ditN9J80rSWwnYRumwb4ww",target:"_blank",rel:"noopener noreferrer"},v=e("\u5B9D\u5854\u9762\u677F"),b=e("\u8FD9\u4E2A\u795E\u5668\u5C31\u53EF\u4EE5\u5B89\u88C5\u4E86\u3002"),m=i(`<p>\u4E0D\u8FC7\uFF0C\u5982\u679C\u5728\u5B89\u88C5\u5B9D\u5854\u9762\u677F\u5FC5\u5907\u5DE5\u5177\u5305\u7684\u65F6\u5019\uFF0C\u5982\u679C\u9009\u62E9\u4E86 phpmyadmin\uFF08MySQL \u7684\u7BA1\u7406\u5DE5\u5177\uFF09\uFF0C\u4F1A\u8986\u76D6\u6389 80 \u7AEF\u53E3\uFF0C\u5C31\u5BFC\u81F4\u6CA1\u529E\u6CD5\u76F4\u63A5\u901A\u8FC7\u9ED8\u8BA4\u914D\u7F6E\u7684\u65B9\u5F0F\u8BBF\u95EE Nginx \u542F\u52A8\u9875\u9762\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nginx/nginx-06.png" alt=""></p><p>\u6211\u8FD9\u91CC\u4EE5 macOS \u73AF\u5883\u4E3A\u4F8B\uFF0C\u6765\u6F14\u793A\u4E00\u4E0B\u3002</p><p>\u7B2C\u4E00\u6B65\uFF0C\u901A\u8FC7 <code>brew info nginx</code> \u547D\u4EE4\u67E5\u770B Nginx \u662F\u5426\u5B89\u88C5\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nginx/nginx-07.png" alt=""></p><p>\u7B2C\u4E8C\u6B65\uFF0C\u901A\u8FC7 <code>brew install nginx</code> \u547D\u4EE4\u5B89\u88C5 Nginx\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nginx/nginx-08.png" alt=""></p><p>\u4ECE\u4EE5\u4E0A\u4FE1\u606F\u53EF\u4EE5\u5F97\u51FA\uFF1A</p><ul><li>\u6839\u76EE\u5F55\u662F <code>/usr/local/var/www</code></li><li>\u914D\u7F6E\u6587\u4EF6\u662F <code>/usr/local/etc/nginx/nginx.conf</code></li><li>\u9ED8\u8BA4\u7AEF\u53E3\u662F 8080</li></ul><p>\u7B2C\u4E09\u6B65\uFF0C\u901A\u8FC7 <code>nginx</code> \u547D\u4EE4\u542F\u52A8 Nginx\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nginx/nginx-09.png" alt=""></p><p>\u7B2C\u56DB\u6B65\uFF0C\u5728\u6D4F\u89C8\u5668\u5730\u5740\u680F\u901A\u8FC7 <code>localhost:8080</code> \u8BBF\u95EE\uFF0C\u53EF\u4EE5\u770B\u5230\u4EE5\u4E0B\u6B22\u8FCE\u9875\u9762\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nginx/nginx-10.png" alt=""></p><h3 id="\u4E09\u3001nginx-\u5E38\u7528\u547D\u4EE4" tabindex="-1"><a class="header-anchor" href="#\u4E09\u3001nginx-\u5E38\u7528\u547D\u4EE4" aria-hidden="true">#</a> \u4E09\u3001Nginx \u5E38\u7528\u547D\u4EE4</h3><p>\u901A\u5E38\u6765\u8BF4\uFF0CNginx \u4E00\u65E6\u542F\u52A8\u540E\uFF0C\u6211\u4EEC\u662F\u5F88\u5C11\u8BA9\u5B83\u9000\u51FA\u7684\uFF0C\u4F7F\u7528\u6700\u591A\u7684\u5C31\u662F reload \u547D\u4EE4\u3002\u5F53\u6211\u4EEC\u4FEE\u6539\u4E86\u914D\u7F6E\u6587\u4EF6\uFF0C\u662F\u9700\u8981\u6267\u884C\u4E00\u6B21 reload \u547D\u4EE4\u8BA9 Nginx \u751F\u6548\u7684\u3002</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>nginx  \u542F\u52A8
 nginx -s stop  \u505C\u6B62
 nginx -s quit  \u5B89\u5168\u9000\u51FA
 nginx -s reload  \u91CD\u65B0\u52A0\u8F7D\u914D\u7F6E\u6587\u4EF6
diff --git a/dist/assets/nicearticle.html.aa656631.js b/dist/assets/nicearticle.html.4730077f.js
similarity index 99%
rename from dist/assets/nicearticle.html.aa656631.js
rename to dist/assets/nicearticle.html.4730077f.js
index ef15706f..70990101 100644
--- a/dist/assets/nicearticle.html.aa656631.js
+++ b/dist/assets/nicearticle.html.4730077f.js
@@ -1 +1 @@
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Task\uFF0C\u8FD9\u4E2A\u5B9A\u65F6\u4EFB\u52A1\u6846\u67B6\u771F\u9999\uFF01"),p_={href:"https://mp.weixin.qq.com/s/4Zs3BZwOxCQ2eOaKd9Z1NQ",target:"_blank",rel:"noopener noreferrer"},d_=o("\u8FD8\u5728\u4ECE\u96F6\u5F00\u59CB\u642D\u5EFA\u9879\u76EE\uFF1F\u63A8\u8350\u4E00\u6B3E\u9AD8\u989C\u503C\u7684\u524D\u540E\u7AEF\u5206\u79BB\u811A\u624B\u67B6\uFF01"),f_={href:"https://mp.weixin.qq.com/s/Bd7ldWUpUjDW_oHVM_IPhw",target:"_blank",rel:"noopener noreferrer"},m_=o("\u6C42\u4F60\u4E86\uFF0C\u522B\u4E71\u6253\u5370\u65E5\u5FD7\u4E86\uFF01"),q_={href:"https://mp.weixin.qq.com/s/J_nm7MyqU692Zszs-xBuNA",target:"_blank",rel:"noopener noreferrer"},u_=o("\u8FD8\u5728\u7528\u7B28\u91CD\u7684 ELK\uFF1F\u8FD9\u4E2A\u8F7B\u91CF\u7EA7\u5F00\u6E90\u65E5\u5FD7\u7CFB\u7EDF\u771F\u9999\uFF01"),g_={href:"https://mp.weixin.qq.com/s/VYpfpuY6_r99fJsCodEJug",target:"_blank",rel:"noopener noreferrer"},w_=o("\u5F88\u54C7\u585E\u7684\u4E00\u4E2A SpringBoot + Vue 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noreferrer"},y_=o("\u9762\u8BD5\u5B98\uFF1A\u804A\u804A\u79D2\u6740\u7CFB\u7EDF\u5982\u4F55\u8BBE\u8BA1\uFF1F"),z_={href:"https://mp.weixin.qq.com/s/nOU-WUQjGMjCV_REe3CIjQ",target:"_blank",rel:"noopener noreferrer"},J_=o("\u6211\u9AD8\u6548\u5B66\u4E60\u7F16\u7A0B\u7684\u5FC3\u5F97"),D_={href:"https://mp.weixin.qq.com/s/ZruUzCtcFC72Ej3-0PFn3A",target:"_blank",rel:"noopener noreferrer"},v_=o("Redis \u9762\u8BD5\u9898/\u77E5\u8BC6\u70B9\u603B\u7ED3\uFF01\uFF082021 \u6700\u65B0\u7248\uFF09"),T_={href:"https://mp.weixin.qq.com/s/07X7JzOHrXqLGNleBSgeIg",target:"_blank",rel:"noopener noreferrer"},I_=o("\u57FA\u4E8E Token \u7684\u591A\u5E73\u53F0\u8EAB\u4EFD\u8BA4\u8BC1\u67B6\u6784\u8BBE\u8BA1\uFF01"),M_={href:"https://mp.weixin.qq.com/s/uHYw2Yd6tScAWoXkiptx7A",target:"_blank",rel:"noopener noreferrer"},j_=o("\u56FE\u89E3\u64CD\u4F5C\u7CFB\u7EDF\u3001\u7F51\u7EDC\u3001\u8BA1\u7B97\u673A\u7EC4\u6210PDF\u4E0B\u8F7D\uFF01"),C_={href:"https://mp.weixin.qq.com/s/esp-9HC9QJzYX46BEn8Elg",target:"_blank",rel:"noopener noreferrer"},E_=o("\u706B\u7206 Github\uFF01\u4E00\u6B3E Nginx \u53EF\u89C6\u5316\u914D\u7F6E\u795E\u5668"),H_={href:"https://mp.weixin.qq.com/s/tKeOw8JiSC8G4mIqQvReYA",target:"_blank",rel:"noopener noreferrer"},N_=o("\u771F\u9999\uFF01\u200BMyBatis-Plus \u4ECE\u5165\u95E8\u5230\u4E0A\u624B\u5E72\u4E8B\uFF01"),P_={href:"https://mp.weixin.qq.com/s/LtKdTIQ0X3kyRgecTEzuvA",target:"_blank",rel:"noopener noreferrer"},O_=o("\u8FDD\u7EA6\u4E86\uFF0C\u8D54\u4E86\u4E00\u4E2A\u6708\u7684\u5DE5\u8D44\uFF01\u8C08\u8C08\u4E09\u65B9\u534F\u8BAE"),G_={href:"https://mp.weixin.qq.com/s/2B9popH_HV-DjkzVQ7Pnew",target:"_blank",rel:"noopener noreferrer"},U_=o("\u6211\u5728\u56FD\u4F01\u5916\u5305\u4E00\u5E74\u7684\u7ECF\u5386\u548C\u611F\u53D7"),V_={href:"https://mp.weixin.qq.com/s/hkQKIntXgu5Thdc8XeNRGw",target:"_blank",rel:"noopener noreferrer"},R_=o("\u6211\u662F\u600E\u4E48\u5B66\u4E60\u7F16\u7A0B\u7684\uFF1F"),W_={href:"https://mp.weixin.qq.com/s/ZVOiT-_C3f-g7aj3760Q-g",target:"_blank",rel:"noopener noreferrer"},X_=o("\u4E00\u5768\u4E00\u5768\u7684 if/else \u53C2\u6570\u6821\u9A8C\uFF0C\u7EC8\u4E8E\u88AB SpringBoot \u53C2\u6570\u6821\u9A8C\u7EC4\u4EF6\u6574\u5E72\u51C0\u4E86\uFF01"),Y_={href:"https://mp.weixin.qq.com/s/XnLj45P3_CmN7SixHBGJ-g",target:"_blank",rel:"noopener noreferrer"},K_=o("30\u5F20\u56FE\uFF01\u624B\u628A\u624B\u5E26\u4F60\u76D8 Spring Boot \u524D\u540E\u7AEF\u5206\u79BB\u5B9E\u6218\u9879\u76EE\uFF01"),L_={href:"https://mp.weixin.qq.com/s/qovVHbffkxEBcgTzYsEPag",target:"_blank",rel:"noopener noreferrer"},F_=o("2021 \u6700\u65B0Java\u5B9E\u6218\u9879\u76EE\u6E90\u7801\u6253\u5305\u4E0B\u8F7D"),Z_={href:"https://mp.weixin.qq.com/s/8100Q6DpNg7d9s7rL4ezWQ",target:"_blank",rel:"noopener noreferrer"},$_=o("\u5408\u80A5\u6709\u54EA\u4E9B\u725B\u6279\u7684\u4E92\u8054\u7F51\u516C\u53F8?"),eh={href:"https://mp.weixin.qq.com/s/5nePrhTSe0m0De1j8WSmSg",target:"_blank",rel:"noopener noreferrer"},oh=o("Docker \u4ECE\u5165\u95E8\u5230\u4E0A\u624B\u5E72\u4E8B\uFF01\u770B\u8FD9\u7BC7\u5C31\u591F\u4E86\uFF01"),th={href:"https://mp.weixin.qq.com/s/nFEUZ8COMZUz5Cvn8xgiNA",target:"_blank",rel:"noopener noreferrer"},nh=o("\u5982\u4F55\u7CFB\u7EDF\u5B66\u4E60\u8BA1\u7B97\u673A\u7F51\u7EDC\uFF1F"),rh={href:"https://mp.weixin.qq.com/s/dmwRkt_DytjWBkfNC4RA7A",target:"_blank",rel:"noopener noreferrer"},sh=o("\u6280\u672F\u5927\u4F6C\u4EEC\u90FD\u662F\u600E\u4E48\u5B66\u4E60\u7684\uFF1F"),ih={href:"https://mp.weixin.qq.com/s/q9un4X4oPr6TkjIQ0rOStg",target:"_blank",rel:"noopener noreferrer"},lh=o("\u4E00\u6B3E\u57FA\u4E8E Spring Boot \u7684\u73B0\u4EE3\u5316\u793E\u533A\uFF08\u8BBA\u575B/\u95EE\u7B54/\u793E\u4EA4\u7F51\u7EDC/\u535A\u5BA2\uFF09\uFF01"),_h={href:"https://mp.weixin.qq.com/s/WWND70GFun2W9Dei5YAAyQ",target:"_blank",rel:"noopener noreferrer"},hh=o("\u4E00\u4E2A\u57FA\u4E8ESpring Cloud \u7684\u9762\u8BD5\u5237\u9898\u7CFB\u7EDF\u3002\u9762\u8BD5\u3001\u6BD5\u8BBE\u3001\u9879\u76EE\u7ECF\u9A8C\u4E00\u7F51\u6253\u5C3D"),ah={href:"https://mp.weixin.qq.com/mp/profile_ext?action=home&__biz=MzU1Nzg4NjgyMw==&scene=124#wechat_redirect",target:"_blank",rel:"noopener noreferrer"},ch=o("macrozheng"),ph={href:"https://mp.weixin.qq.com/s/i_8Ut4S0gktA6AvbAg7tTA",target:"_blank",rel:"noopener noreferrer"},dh=o("\u79D2\u6740\u6D3B\u52A8\u6280\u672F\u65B9\u6848\uFF0CRedis\u7533\u8BF732\u4E2AG\uFF0C\u88AB\u6280\u672F\u603B\u76D1\u6311\u6218\u4E86..."),fh={href:"https://mp.weixin.qq.com/s/s2MoZuapTiAUesYXpYSbhw",target:"_blank",rel:"noopener noreferrer"},mh=o("\u8FD8\u5728\u7528 RedisTemplate\uFF1F\u8BD5\u8BD5 Redis \u5B98\u65B9 ORM \u6846\u67B6\u5427\uFF0C\u7528\u8D77\u6765\u591F\u4F18\u96C5\uFF01"),qh={href:"https://mp.weixin.qq.com/s/eGJ7B-XTYs-eoEtivIo2BQ",target:"_blank",rel:"noopener noreferrer"},uh=o("\u963F\u91CC\u4E8C\u9762\uFF1A\u5916\u90E8\u63A5\u53E3\u5927\u91CF\u8D85\u65F6\uFF0C\u7CFB\u7EDF\u88AB\u62D6\u57AE\uFF0C\u5F15\u53D1\u96EA\u5D29\uFF01\u548B\u6574\uFF1F"),gh={href:"https://mp.weixin.qq.com/s/lylO67bu-M1vg8BbsNbKBQ",target:"_blank",rel:"noopener noreferrer"},wh=o("SpringBoot \u642D\u5EFA\u57FA\u4E8E MinIO \u7684\u9AD8\u6027\u80FD\u5B58\u50A8\u670D\u52A1\uFF01"),bh={href:"https://mp.weixin.qq.com/s/yP5vRyLXFHlduJ5N6SmBSQ",target:"_blank",rel:"noopener noreferrer"},kh=o("\u6BD4 Elasticsearch \u66F4\u5FEB\uFF01RediSearch + RedisJSON = \u738B\u70B8\uFF01"),xh={href:"https://mp.weixin.qq.com/s/-2ZlvHfeh7gKVylrKpJyYQ",target:"_blank",rel:"noopener noreferrer"},Qh=o("\u4E00\u952E\u90E8\u7F72 K8S \u73AF\u5883\uFF0C10\u5206\u949F\u73A9\u8F6C\uFF0C\u8FD9\u6B3E\u5F00\u6E90\u795E\u5668\u5B9E\u5728\u592A\u9999\u4E86\uFF01"),Ah={href:"https://mp.weixin.qq.com/s/H7dQk_8kno-GKsR_nXtbsQ",target:"_blank",rel:"noopener noreferrer"},Sh=o("\u989C\u503C\u7206\u8868\uFF01Redis \u5B98\u65B9\u53EF\u89C6\u5316\u5DE5\u5177\u6765\u5566\uFF0C\u529F\u80FD\u771F\u5FC3\u5F3A\u5927\uFF01"),Bh={href:"https://mp.weixin.qq.com/s/A-w5t2_lwTWbFTEZ3OjPVg",target:"_blank",rel:"noopener noreferrer"},yh=o("MySQL + JSON = \u738B\u70B8\uFF01\uFF01"),zh={href:"https://mp.weixin.qq.com/s/5SgoZpaxGeyGKuvRl1s5pA",target:"_blank",rel:"noopener noreferrer"},Jh=o("SpringBoot\u4E2D\u5B9E\u73B0\u4E1A\u52A1\u6821\u9A8C\uFF0C\u8FD9\u79CD\u65B9\u5F0F\u624D\u53EB\u4F18\u96C5\uFF01"),Dh={href:"https://mp.weixin.qq.com/s/p4r9hPHnNTK5EKcWIAL8Vw",target:"_blank",rel:"noopener noreferrer"},vh=o("\u5B98\u65B9\u6807\u914D\uFF01\u540A\u70B8\u5929\u7684 Linux \u53EF\u89C6\u5316\u7BA1\u7406\u5DE5\u5177\uFF0C\u5FC5\u987B\u63A8\u8350\u7ED9\u4F60\uFF01"),Th={href:"https://mp.weixin.qq.com/s/QzVplEr_em-OpK2Znx1kbA",target:"_blank",rel:"noopener noreferrer"},Ih=o("SpringBoot \u6027\u80FD\u8FD9\u6837\u4F18\u5316\uFF0C\u540C\u4E8B\u76F4\u547C\u54C7\u585E\uFF01"),Mh={href:"https://mp.weixin.qq.com/s/ETUW24Lf7wfKPy5nqvyEbg",target:"_blank",rel:"noopener noreferrer"},jh=o("\u63A8\u8350\u4E00\u6B3E\u7B80\u6D01\u597D\u7528\u7684HTTP\u8BF7\u6C42\u5DE5\u5177\uFF0C\u754C\u9762\u633A\u9177\u70AB\uFF01"),Ch={href:"https://mp.weixin.qq.com/s/IiFYud-wAFqjuZCyrD-ozA",target:"_blank",rel:"noopener noreferrer"},Eh=o("\u518D\u89C1 Feign\uFF01\u63A8\u8350\u4E00\u6B3E\u5FAE\u670D\u52A1\u95F4\u8C03\u7528\u795E\u5668\uFF0C\u8DDF SpringCloud \u7EDD\u914D\uFF01"),Hh={href:"https://mp.weixin.qq.com/s/T7LDF9RlJ3k_2cRsFLwNBg",target:"_blank",rel:"noopener noreferrer"},Nh=o("SpringBoot\u4E2D\u8FD95\u79CD\u9AD8\u5927\u4E0A\u7684yml\u6587\u4EF6\u8BFB\u53D6\u65B9\u5F0F\uFF0C\u4F60\u77E5\u9053\u5417\uFF1F"),Ph={href:"https://mp.weixin.qq.com/s/0PxWbOYzqqUbpxiWueGUTg",target:"_blank",rel:"noopener noreferrer"},Oh=o("\u8FD8\u5728\u7528 Xshell \uFF1F\u8BD5\u8BD5\u8FD9\u6B3E\u70AB\u9177\u7684\u7EC8\u7AEF\u5DE5\u5177\u5427\uFF0C\u529F\u80FD\u5F88\u5F3A\u5927\uFF01"),Gh={href:"https://mp.weixin.qq.com/s/Mhwgbcb-h0eoSmSwaNN-ww",target:"_blank",rel:"noopener noreferrer"},Uh=o("18\u5F20\u56FE\uFF0C\u8BE6\u89E3SpringBoot\u89E3\u6790yml\u5168\u6D41\u7A0B\uFF0C\u5199\u7684\u4E5F\u592A\u597D\u4E86\u53ED\uFF01"),Vh={href:"https://mp.weixin.qq.com/s/lOif5gesMUzL0zdOSkZ0fg",target:"_blank",rel:"noopener 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Fp=_(c,[["render",Wp],["__file","nicearticle.html.vue"]]);export{Fp as default};
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Spring Boot \u7684\u73B0\u4EE3\u5316\u793E\u533A\uFF08\u8BBA\u575B/\u95EE\u7B54/\u793E\u4EA4\u7F51\u7EDC/\u535A\u5BA2\uFF09\uFF01"),_h={href:"https://mp.weixin.qq.com/s/WWND70GFun2W9Dei5YAAyQ",target:"_blank",rel:"noopener noreferrer"},hh=o("\u4E00\u4E2A\u57FA\u4E8ESpring Cloud \u7684\u9762\u8BD5\u5237\u9898\u7CFB\u7EDF\u3002\u9762\u8BD5\u3001\u6BD5\u8BBE\u3001\u9879\u76EE\u7ECF\u9A8C\u4E00\u7F51\u6253\u5C3D"),ah={href:"https://mp.weixin.qq.com/mp/profile_ext?action=home&__biz=MzU1Nzg4NjgyMw==&scene=124#wechat_redirect",target:"_blank",rel:"noopener noreferrer"},ch=o("macrozheng"),ph={href:"https://mp.weixin.qq.com/s/i_8Ut4S0gktA6AvbAg7tTA",target:"_blank",rel:"noopener noreferrer"},dh=o("\u79D2\u6740\u6D3B\u52A8\u6280\u672F\u65B9\u6848\uFF0CRedis\u7533\u8BF732\u4E2AG\uFF0C\u88AB\u6280\u672F\u603B\u76D1\u6311\u6218\u4E86..."),fh={href:"https://mp.weixin.qq.com/s/s2MoZuapTiAUesYXpYSbhw",target:"_blank",rel:"noopener noreferrer"},mh=o("\u8FD8\u5728\u7528 RedisTemplate\uFF1F\u8BD5\u8BD5 Redis \u5B98\u65B9 ORM \u6846\u67B6\u5427\uFF0C\u7528\u8D77\u6765\u591F\u4F18\u96C5\uFF01"),qh={href:"https://mp.weixin.qq.com/s/eGJ7B-XTYs-eoEtivIo2BQ",target:"_blank",rel:"noopener noreferrer"},uh=o("\u963F\u91CC\u4E8C\u9762\uFF1A\u5916\u90E8\u63A5\u53E3\u5927\u91CF\u8D85\u65F6\uFF0C\u7CFB\u7EDF\u88AB\u62D6\u57AE\uFF0C\u5F15\u53D1\u96EA\u5D29\uFF01\u548B\u6574\uFF1F"),gh={href:"https://mp.weixin.qq.com/s/lylO67bu-M1vg8BbsNbKBQ",target:"_blank",rel:"noopener noreferrer"},wh=o("SpringBoot \u642D\u5EFA\u57FA\u4E8E MinIO \u7684\u9AD8\u6027\u80FD\u5B58\u50A8\u670D\u52A1\uFF01"),bh={href:"https://mp.weixin.qq.com/s/yP5vRyLXFHlduJ5N6SmBSQ",target:"_blank",rel:"noopener noreferrer"},kh=o("\u6BD4 Elasticsearch \u66F4\u5FEB\uFF01RediSearch + RedisJSON = \u738B\u70B8\uFF01"),xh={href:"https://mp.weixin.qq.com/s/-2ZlvHfeh7gKVylrKpJyYQ",target:"_blank",rel:"noopener noreferrer"},Qh=o("\u4E00\u952E\u90E8\u7F72 K8S \u73AF\u5883\uFF0C10\u5206\u949F\u73A9\u8F6C\uFF0C\u8FD9\u6B3E\u5F00\u6E90\u795E\u5668\u5B9E\u5728\u592A\u9999\u4E86\uFF01"),Ah={href:"https://mp.weixin.qq.com/s/H7dQk_8kno-GKsR_nXtbsQ",target:"_blank",rel:"noopener noreferrer"},Sh=o("\u989C\u503C\u7206\u8868\uFF01Redis \u5B98\u65B9\u53EF\u89C6\u5316\u5DE5\u5177\u6765\u5566\uFF0C\u529F\u80FD\u771F\u5FC3\u5F3A\u5927\uFF01"),Bh={href:"https://mp.weixin.qq.com/s/A-w5t2_lwTWbFTEZ3OjPVg",target:"_blank",rel:"noopener noreferrer"},yh=o("MySQL + JSON = \u738B\u70B8\uFF01\uFF01"),zh={href:"https://mp.weixin.qq.com/s/5SgoZpaxGeyGKuvRl1s5pA",target:"_blank",rel:"noopener noreferrer"},Jh=o("SpringBoot\u4E2D\u5B9E\u73B0\u4E1A\u52A1\u6821\u9A8C\uFF0C\u8FD9\u79CD\u65B9\u5F0F\u624D\u53EB\u4F18\u96C5\uFF01"),Dh={href:"https://mp.weixin.qq.com/s/p4r9hPHnNTK5EKcWIAL8Vw",target:"_blank",rel:"noopener noreferrer"},vh=o("\u5B98\u65B9\u6807\u914D\uFF01\u540A\u70B8\u5929\u7684 Linux \u53EF\u89C6\u5316\u7BA1\u7406\u5DE5\u5177\uFF0C\u5FC5\u987B\u63A8\u8350\u7ED9\u4F60\uFF01"),Th={href:"https://mp.weixin.qq.com/s/QzVplEr_em-OpK2Znx1kbA",target:"_blank",rel:"noopener noreferrer"},Ih=o("SpringBoot \u6027\u80FD\u8FD9\u6837\u4F18\u5316\uFF0C\u540C\u4E8B\u76F4\u547C\u54C7\u585E\uFF01"),Mh={href:"https://mp.weixin.qq.com/s/ETUW24Lf7wfKPy5nqvyEbg",target:"_blank",rel:"noopener noreferrer"},jh=o("\u63A8\u8350\u4E00\u6B3E\u7B80\u6D01\u597D\u7528\u7684HTTP\u8BF7\u6C42\u5DE5\u5177\uFF0C\u754C\u9762\u633A\u9177\u70AB\uFF01"),Ch={href:"https://mp.weixin.qq.com/s/IiFYud-wAFqjuZCyrD-ozA",target:"_blank",rel:"noopener noreferrer"},Eh=o("\u518D\u89C1 Feign\uFF01\u63A8\u8350\u4E00\u6B3E\u5FAE\u670D\u52A1\u95F4\u8C03\u7528\u795E\u5668\uFF0C\u8DDF SpringCloud \u7EDD\u914D\uFF01"),Hh={href:"https://mp.weixin.qq.com/s/T7LDF9RlJ3k_2cRsFLwNBg",target:"_blank",rel:"noopener noreferrer"},Nh=o("SpringBoot\u4E2D\u8FD95\u79CD\u9AD8\u5927\u4E0A\u7684yml\u6587\u4EF6\u8BFB\u53D6\u65B9\u5F0F\uFF0C\u4F60\u77E5\u9053\u5417\uFF1F"),Ph={href:"https://mp.weixin.qq.com/s/0PxWbOYzqqUbpxiWueGUTg",target:"_blank",rel:"noopener noreferrer"},Oh=o("\u8FD8\u5728\u7528 Xshell \uFF1F\u8BD5\u8BD5\u8FD9\u6B3E\u70AB\u9177\u7684\u7EC8\u7AEF\u5DE5\u5177\u5427\uFF0C\u529F\u80FD\u5F88\u5F3A\u5927\uFF01"),Gh={href:"https://mp.weixin.qq.com/s/Mhwgbcb-h0eoSmSwaNN-ww",target:"_blank",rel:"noopener noreferrer"},Uh=o("18\u5F20\u56FE\uFF0C\u8BE6\u89E3SpringBoot\u89E3\u6790yml\u5168\u6D41\u7A0B\uFF0C\u5199\u7684\u4E5F\u592A\u597D\u4E86\u53ED\uFF01"),Vh={href:"https://mp.weixin.qq.com/s/lOif5gesMUzL0zdOSkZ0fg",target:"_blank",rel:"noopener noreferrer"},Rh=o("\u8FD8\u5728\u7528HttpUtil\uFF1F\u8BD5\u8BD5\u8FD9\u6B3E\u4F18\u96C5\u7684HTTP\u5BA2\u6237\u7AEF\u5DE5\u5177\u5427\uFF0C\u8DDFSpringBoot\u7EDD\u914D\uFF01"),Wh={href:"https://mp.weixin.qq.com/s/sFiXusNXkAN-kzMGM8jv4A",target:"_blank",rel:"noopener noreferrer"},Xh=o("Dubbo\u4E3A\u4EC0\u4E48\u7528Go\u91CD\u5199\uFF1F"),Yh={href:"https://mp.weixin.qq.com/s/RxexoojM4Egnzz4O2cmw3Q",target:"_blank",rel:"noopener noreferrer"},Kh=o("5\u5206\u949F\u641E\u5B9A\uFF01\u8FD9\u6B3E\u989C\u503C\u7206\u8868\u7684\u6570\u636E\u53EF\u89C6\u5316\u5DE5\u5177\uFF0C\u4F60\u503C\u5F97\u62E5\u6709\uFF01"),Lh={href:"https://mp.weixin.qq.com/s/_tVNpEwOxWAYNIyHtQPYnw",target:"_blank",rel:"noopener noreferrer"},Fh=o("\u5B9E\u6218\uFF01SpringBoot \u6574\u5408\u963F\u91CC\u5F00\u6E90 Canal \u5B9E\u73B0\u6570\u636E\u589E\u91CF\u540C\u6B65\uFF01"),Zh={href:"https://mp.weixin.qq.com/s/6qqnHP_jjmWUDRHqk9fMaQ",target:"_blank",rel:"noopener noreferrer"},$h=o("\u4E0D\u5199\u4EE3\u7801\u8F7B\u677E\u5B9E\u73B0\u6570\u636E\u53EF\u89C6\u5316\uFF0C\u8FD9\u6B3E\u57FA\u4E8ESpringBoot\u7684\u795E\u5668\uFF0C\u7B80\u76F4\u7EDD\u4E86\uFF01"),ea={href:"https://mp.weixin.qq.com/s/wss2ykz6214MW43uNoq9xg",target:"_blank",rel:"noopener noreferrer"},oa=o("\u8FD9\u4E2A\u5F00\u6E90\u4EFB\u52A1&\u9879\u76EE\u7BA1\u7406\u5DE5\u5177\u771F\u4E0D\u9519\uFF01\u989C\u503C\u7EDD\u4E86\uFF01"),ta={href:"https://mp.weixin.qq.com/s/bETiShLbNdpQHPW6Von58g",target:"_blank",rel:"noopener noreferrer"},na=o("\u8FD9\u4E9B\u5E74\u6211\u7528\u8FC7\u7684API\u6587\u6863\u5DE5\u5177\uFF0C\u4E2A\u4E2A\u662F\u7CBE\u54C1\uFF01"),ra={href:"https://mp.weixin.qq.com/s/WrpYozkaDxU4-lqDeWgGww",target:"_blank",rel:"noopener noreferrer"},sa=o("0.07 \u79D2\u542F\u52A8\u4E00\u4E2A SpringBoot \u9879\u76EE\uFF01"),ia={href:"https://mp.weixin.qq.com/s/3tZta7ubm6kb5-b_fUnnHQ",target:"_blank",rel:"noopener noreferrer"},la=o("Sql\u4F18\u5316\u768415\u4E2A\u5C0F\u6280\u5DE7\uFF0C\u8FD9\u4E5F\u592A\u5B9E\u7528\u4E86\u53ED\uFF01"),_a={href:"https://mp.weixin.qq.com/s/gMx-REGajEjW3XX_JFt_EQ",target:"_blank",rel:"noopener noreferrer"},ha=o("MyBatis \u4E2D\u4E3A\u4EC0\u4E48\u4E0D\u5EFA\u8BAE\u4F7F\u7528 where 1=1\uFF1F"),aa={href:"https://mp.weixin.qq.com/s/iT1ThMsZ8uJr2TJZHofn5Q",target:"_blank",rel:"noopener noreferrer"},ca=o("Mybatis-Plus \u5B98\u65B9\u795E\u5668\u53D1\u5E03\uFF01"),pa={href:"https://mp.weixin.qq.com/s/xiJU9YMtT3Y9ISmNlTaKew",target:"_blank",rel:"noopener noreferrer"},da=o("\u5F53 Swagger \u9047\u4E0A Torna\uFF0C\u77AC\u95F4\u9AD8\u5927\u4E0A\u4E86\uFF01"),fa={href:"https://mp.weixin.qq.com/s/mSOs1KPFTa-veQe48YAX1w",target:"_blank",rel:"noopener noreferrer"},ma=o("\u5982\u4F55\u4FDD\u8BC1\u7CFB\u7EDF\u7684\u9AD8\u53EF\u7528\uFF0C\u5F02\u5730\u591A\u6D3B\u4E86\u89E3\u4E0B\uFF01"),qa={href:"https://mp.weixin.qq.com/s/ZbRYG-_AzDotnfgouv19NA",target:"_blank",rel:"noopener noreferrer"},ua=o("\u8FD8\u5728\u7528Swagger\uFF1F\u8BD5\u8BD5\u8FD9\u6B3E\u96F6\u6CE8\u89E3\u4FB5\u5165\u7684API\u6587\u6863\u751F\u6210\u5DE5\u5177\uFF0C\u8DDFPostman\u7EDD\u914D\uFF01"),ga={href:"https://mp.weixin.qq.com/s/hfO_ZwhLWoNc6BPoqv2rzQ",target:"_blank",rel:"noopener noreferrer"},wa=o("@Value\u7ADF\u7136\u80FD\u73A9\u51FA\u8FD9\u4E48\u591A\u82B1\u6837\uFF0C\u6DA8\u77E5\u8BC6\u4E86"),ba={href:"https://mp.weixin.qq.com/s/Yt3IIBwbgoweQnI0buSW6Q",target:"_blank",rel:"noopener noreferrer"},ka=o("\u5E72\u6389 BeanUtils\uFF01\u8BD5\u8BD5\u8FD9\u6B3E Bean \u81EA\u52A8\u6620\u5C04\u5DE5\u5177\uFF0C\u771F\u5FC3\u5F3A\u5927\uFF01"),xa={href:"https://mp.weixin.qq.com/s/Dz9wiLVoKHzNdQWdeLIDQA",target:"_blank",rel:"noopener noreferrer"},Qa=o("SpringBoot\u5B9E\u73B0Excel\u5BFC\u5165\u5BFC\u51FA\uFF0C\u597D\u7528\u5230\u7206\uFF0CPOI\u53EF\u4EE5\u6254\u6389\u4E86\uFF01"),Aa={href:"https://mp.weixin.qq.com/s/w5-wJbq38mmt0312fqlJJA",target:"_blank",rel:"noopener noreferrer"},Sa=o("SpringBoot \u5982\u4F55\u751F\u6210\u63A5\u53E3\u6587\u6863\uFF0C\u8001\u9E1F\u4EEC\u90FD\u8FD9\u4E48\u73A9\u7684\uFF01"),Ba={href:"https://mp.weixin.qq.com/s/ReDg_P9W8QkYBsJrVEEIzw",target:"_blank",rel:"noopener noreferrer"},ya=o("16 \u4E2A Redis \u5E38\u89C1\u4F7F\u7528\u573A\u666F\uFF01"),za={href:"https://mp.weixin.qq.com/s/JbnRJeODZcAkZ527oXeSjg",target:"_blank",rel:"noopener noreferrer"},Ja=o("12 \u6B3E yyds \u7684 IDEA\u63D2\u4EF6\uFF0C\u914D\u4E0A18\u6761\u4F7F\u7528\u6280\u5DE7\uFF0C\u7EDD\u4E86\uFF01"),Da={href:"https://mp.weixin.qq.com/s/1dhQkSM_au3HICeGL4eoWQ",target:"_blank",rel:"noopener noreferrer"},va=o("\u65E0\u9700\u5F00\u53D1\u90E8\u7F72\uFF0C\u79D2\u5EFA\u4F18\u96C5\u7684\u5F00\u6E90\u9879\u76EE\u6587\u6863\uFF0C\u8FD9\u4E2A\u5DE5\u5177\u7528\u8D77\u6765\u8D3C\u723D\uFF01"),Ta={href:"https://mp.weixin.qq.com/s/KiJTBDxsAEb4mpCjQKUqnw",target:"_blank",rel:"noopener noreferrer"},Ia=o("SpringBoot+Kafka+ELK \u5B8C\u6210\u6D77\u91CF\u65E5\u5FD7\u6536\u96C6\uFF08\u8D85\u8BE6\u7EC6\uFF09\uFF01"),Ma={href:"https://mp.weixin.qq.com/s/2OzZjAsPPCwD2Gc8PCIUiA",target:"_blank",rel:"noopener noreferrer"},ja=o("\u7B80\u76F4\u795E\u5668\uFF01\u4E00\u952E\u751F\u6210\u9753\u4E3D\u7684\u535A\u5BA2\u7F51\u7AD9\uFF0C\u771F\u9999\uFF01"),Ca={href:"https://mp.weixin.qq.com/s/zFUCBYCiTg1URwzpG7O8uQ",target:"_blank",rel:"noopener noreferrer"},Ea=o("\u4E3A\u4EC0\u4E48\u4EBA\u5BB6\u7684\u5F00\u6E90\u9879\u76EE\u6587\u6863\u5982\u6B64\u70AB\u9177\uFF1F\u539F\u6765\u7528\u7684\u662F\u8FD9\u6B3E\u795E\u5668\uFF01"),Ha={href:"https://mp.weixin.qq.com/s/rConx8VVbf_o9fibHGHbzQ",target:"_blank",rel:"noopener noreferrer"},Na=o("\u8FD8\u5728\u4ECE\u96F6\u5F00\u59CB\u642D\u5EFA\u9879\u76EE\uFF1F\u63A8\u8350\u4E00\u6B3E\u9AD8\u989C\u503C\u7684\u524D\u540E\u7AEF\u5206\u79BB\u811A\u624B\u67B6\uFF01"),Pa={href:"https://mp.weixin.qq.com/s/w4uBKMCaCeVY1ujHOmYB7w",target:"_blank",rel:"noopener noreferrer"},Oa=o("\u5F00\u7BB1\u5373\u7528\uFF01\u770B\u770B\u4EBA\u5BB6\u7684\u5FAE\u670D\u52A1\u6743\u9650\u89E3\u51B3\u65B9\u6848\uFF0C\u90A3\u53EB\u4E00\u4E2A\u4F18\u96C5\uFF01"),Ga={href:"https://mp.weixin.qq.com/s/PCzmZAB8ArHxX0_cyqm47w",target:"_blank",rel:"noopener noreferrer"},Ua=o("\u5FAE\u670D\u52A1\u7684\u7075\u9B42\u6446\u6E21\u8005Nacos\u7A76\u7ADF\u6709\u591A\u5F3A\uFF1F"),Va={href:"https://mp.weixin.qq.com/s/v4b7b-r1V8lpd_oV7qoH8g",target:"_blank",rel:"noopener noreferrer"},Ra=o("\u518D\u89C1Spring Security\uFF01\u63A8\u8350\u4E00\u6B3E\u529F\u80FD\u5F3A\u5927\u7684\u6743\u9650\u8BA4\u8BC1\u6846\u67B6\uFF0C\u7528\u8D77\u6765\u591F\u4F18\u96C5\uFF01"),Wa={href:"https://mp.weixin.qq.com/s/1w_atnVINxVEvyh2KcCqCg",target:"_blank",rel:"noopener noreferrer"},Xa=o("SpringBoot\u914D\u7F6E\u6587\u4EF6\u3001\u9690\u79C1\u6570\u636E\u8131\u654F\u7684\u6700\u4F73\u5B9E\u8DF5\uFF01"),Ya={href:"https://mp.weixin.qq.com/s/N0FvFuo9RuUGzT85qb3RWA",target:"_blank",rel:"noopener 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diff --git a/dist/assets/nixi.html.8b48857f.js b/dist/assets/nixi.html.de6f9361.js
similarity index 93%
rename from dist/assets/nixi.html.8b48857f.js
rename to dist/assets/nixi.html.de6f9361.js
index e2944b40..14089786 100644
--- a/dist/assets/nixi.html.8b48857f.js
+++ b/dist/assets/nixi.html.de6f9361.js
@@ -1 +1 @@
-import{_ as s}from"./plugin-vue_export-helper.21dcd24c.js";import{r as o,o as i,c as d,a as e,b as n,w as l,d as t}from"./app.a0271b9c.js";const r={},_=e("h1",{id:"\u9762\u6E23\u9006\u88AD",tabindex:"-1"},[e("a",{class:"header-anchor",href:"#\u9762\u6E23\u9006\u88AD","aria-hidden":"true"},"#"),t(" \u9762\u6E23\u9006\u88AD")],-1),c=e("blockquote",null,[e("p",null,[e("strong",null,"\u9762\u8BD5\u524D\u5FC5\u8BFB\u7CFB\u5217"),t("\uFF01\u5305\u62EC Java \u57FA\u7840\u3001Java \u96C6\u5408\u6846\u67B6\u3001Java \u5E76\u53D1\u7F16\u7A0B\u3001Java \u865A\u62DF\u673A\u3001Spring\u3001Redis \u7B49\u7B49\u3002")])],-1),u=t("\u9762\u6E23\u9006\u88AD\uFF08Java \u57FA\u7840\u7BC7\uFF09\u5FC5\u770B\u{1F44D}"),h=t("\u9762\u6E23\u9006\u88AD\uFF08Java \u96C6\u5408\u6846\u67B6\u7BC7\uFF09\u5FC5\u770B\u{1F44D}"),f=t("\u9762\u6E23\u9006\u88AD\uFF08Java \u5E76\u53D1\u7F16\u7A0B\u7BC7\uFF09\u5FC5\u770B\u{1F44D}"),m=t("\u9762\u6E23\u9006\u88AD\uFF08Java \u865A\u62DF\u673A\u7BC7\uFF09\u5FC5\u770B\u{1F44D}"),v=t("\u9762\u6E23\u9006\u88AD\uFF08Spring\uFF09\u5FC5\u770B\u{1F44D}"),b=t("\u9762\u6E23\u9006\u88AD\uFF08Redis\uFF09\u5FC5\u770B\u{1F44D}"),p=t("\u9762\u6E23\u9006\u88AD\uFF08MyBatis\uFF09\u5FC5\u770B\u{1F44D}");function x(J,k){const a=o("RouterLink");return i(),d("div",null,[_,c,e("ul",null,[e("li",null,[n(a,{to:"/sidebar/sanfene/javase.html"},{default:l(()=>[u]),_:1})]),e("li",null,[n(a,{to:"/sidebar/sanfene/collection.html"},{default:l(()=>[h]),_:1})]),e("li",null,[n(a,{to:"/sidebar/sanfene/javathread.html"},{default:l(()=>[f]),_:1})]),e("li",null,[n(a,{to:"/sidebar/sanfene/jvm.html"},{default:l(()=>[m]),_:1})]),e("li",null,[n(a,{to:"/sidebar/sanfene/spring.html"},{default:l(()=>[v]),_:1})]),e("li",null,[n(a,{to:"/sidebar/sanfene/redis.html"},{default:l(()=>[b]),_:1})]),e("li",null,[n(a,{to:"/sidebar/sanfene/mybatis.html"},{default:l(()=>[p]),_:1})])])])}var R=s(r,[["render",x],["__file","nixi.html.vue"]]);export{R as default};
+import{_ as s}from"./plugin-vue_export-helper.21dcd24c.js";import{r as o,o as i,c as d,a as e,b as n,w as l,d as t}from"./app.615e41d8.js";const r={},_=e("h1",{id:"\u9762\u6E23\u9006\u88AD",tabindex:"-1"},[e("a",{class:"header-anchor",href:"#\u9762\u6E23\u9006\u88AD","aria-hidden":"true"},"#"),t(" \u9762\u6E23\u9006\u88AD")],-1),c=e("blockquote",null,[e("p",null,[e("strong",null,"\u9762\u8BD5\u524D\u5FC5\u8BFB\u7CFB\u5217"),t("\uFF01\u5305\u62EC Java \u57FA\u7840\u3001Java \u96C6\u5408\u6846\u67B6\u3001Java \u5E76\u53D1\u7F16\u7A0B\u3001Java \u865A\u62DF\u673A\u3001Spring\u3001Redis \u7B49\u7B49\u3002")])],-1),u=t("\u9762\u6E23\u9006\u88AD\uFF08Java \u57FA\u7840\u7BC7\uFF09\u5FC5\u770B\u{1F44D}"),h=t("\u9762\u6E23\u9006\u88AD\uFF08Java \u96C6\u5408\u6846\u67B6\u7BC7\uFF09\u5FC5\u770B\u{1F44D}"),f=t("\u9762\u6E23\u9006\u88AD\uFF08Java \u5E76\u53D1\u7F16\u7A0B\u7BC7\uFF09\u5FC5\u770B\u{1F44D}"),m=t("\u9762\u6E23\u9006\u88AD\uFF08Java \u865A\u62DF\u673A\u7BC7\uFF09\u5FC5\u770B\u{1F44D}"),v=t("\u9762\u6E23\u9006\u88AD\uFF08Spring\uFF09\u5FC5\u770B\u{1F44D}"),b=t("\u9762\u6E23\u9006\u88AD\uFF08Redis\uFF09\u5FC5\u770B\u{1F44D}"),p=t("\u9762\u6E23\u9006\u88AD\uFF08MyBatis\uFF09\u5FC5\u770B\u{1F44D}");function x(J,k){const a=o("RouterLink");return i(),d("div",null,[_,c,e("ul",null,[e("li",null,[n(a,{to:"/sidebar/sanfene/javase.html"},{default:l(()=>[u]),_:1})]),e("li",null,[n(a,{to:"/sidebar/sanfene/collection.html"},{default:l(()=>[h]),_:1})]),e("li",null,[n(a,{to:"/sidebar/sanfene/javathread.html"},{default:l(()=>[f]),_:1})]),e("li",null,[n(a,{to:"/sidebar/sanfene/jvm.html"},{default:l(()=>[m]),_:1})]),e("li",null,[n(a,{to:"/sidebar/sanfene/spring.html"},{default:l(()=>[v]),_:1})]),e("li",null,[n(a,{to:"/sidebar/sanfene/redis.html"},{default:l(()=>[b]),_:1})]),e("li",null,[n(a,{to:"/sidebar/sanfene/mybatis.html"},{default:l(()=>[p]),_:1})])])])}var R=s(r,[["render",x],["__file","nixi.html.vue"]]);export{R as default};
diff --git a/dist/assets/npe.html.01d29f9c.js b/dist/assets/npe.html.297684ef.js
similarity index 99%
rename from dist/assets/npe.html.01d29f9c.js
rename to dist/assets/npe.html.297684ef.js
index 7527702c..21a365bc 100644
--- a/dist/assets/npe.html.01d29f9c.js
+++ b/dist/assets/npe.html.297684ef.js
@@ -1 +1 @@
-import{_ as p}from"./plugin-vue_export-helper.21dcd24c.js";import{o as e,c as t,e as o}from"./app.a0271b9c.js";const r={},n=o('<h1 id="java\u7A7A\u6307\u9488nullpointerexception\u7684\u4F20\u8BF4" tabindex="-1"><a class="header-anchor" href="#java\u7A7A\u6307\u9488nullpointerexception\u7684\u4F20\u8BF4" aria-hidden="true">#</a> Java\u7A7A\u6307\u9488NullPointerException\u7684\u4F20\u8BF4</h1><p><strong>\u7A7A\u6307\u9488</strong>\uFF0C\u53F7\u79F0\u5929\u4E0B\u6700\u5F3A\u523A\u5BA2\u3002</p><p>\u4ED6\u539F\u672C\u4E0D\u53EB\u8FD9\u4E2A\u540D\u5B57\uFF0C\u7A7A\u6307\u9488\u539F\u672C\u590D\u59D3<strong>\u5F02\u5E38</strong>\uFF0C\u7A7A\u6307\u9488\u53EA\u4E0D\u8FC7\u662F\u4ED6\u7684\u6B66\u5668\uFF0C\u4F46\u4ED6\u6740\u622E\u8FC7\u591A\uFF0C\u6E10\u6E10\u5730\u4EBA\u4EEC\u53EA\u8BB0\u4F4F\u4E86\u7A7A\u6307\u9488\u8FD9\u4E09\u4E2A\u5B57\u3002</p><p>\u5929\u4E0B\u6B66\u529F\uFF0C\u552F\u5FEB\u4E0D\u7834\uFF0C\u7A7A\u6307\u9488\u7684\u9488\uFF0C\u4EE5\u5FEB\u548C\u8BE1\u5F02\u8457\u79F0\uFF0C\u7A0D\u6709\u4E0D\u614E\uFF0C\u4FBF\u662F\u4F24\u4EA1\u3002</p><p>... ...</p><p>\u6211\u53EB\u94C1\u67F1\uFF0C\u6211\u6765\u5230\u8FD9\u4E2A\u5947\u602A\u7684\u4E16\u754C\u5DF2\u7ECF\u4E00\u5E74\u4E86\uFF0C\u6211\u7B49\u4E86\u4E00\u5E74\uFF0C\u7A7F\u8D8A\u9644\u8D60\u7684\u8001\u7237\u7237\u3001\u6212\u6307\u3001\u7CFB\u7EDF\u4EC0\u4E48\u7684\u6211\u5230\u73B0\u5728\u90FD\u6CA1\u53D1\u73B0\u3002</p><p>\u800C\u4E14\u8FD9\u4E2A\u4E16\u754C\u770B\u8D77\u6765\u4E5F\u592A\u5947\u602A\u4E86\uFF0C\u8FD9\u91CC\u597D\u50CF\u53EB\u4EC0\u4E48\xA0<strong>Java</strong>\xA0\u5927\u9646\uFF0C\u6211\u53EA\u77E5\u9053\u8FD9\u4E2A\u4E16\u754C\u7684\u6700\u5F3A\u8005\u53EB\u505A\xA0<strong>Object</strong>\uFF0C\u542C\u8BF4\u662F\u4EC0\u4E48\u9053\u7956\u7EA7\u7684\u5B58\u5728\uFF0C\u6211\u4E5F\u4E0D\u77E5\u9053\u662F\u4EC0\u4E48\u610F\u601D\uFF0C\u6BD5\u7ADF\u6211\u73B0\u5728\u597D\u50CF\u8FD8\u662F\u4E2A\u83DC\u9E21\uFF0C\u522B\u7684\u4E3B\u89D2\u4E00\u5E74\u90FD\u5E94\u8BE5\u8981\u98DE\u5347\u4ED9\u754C\u4E86\u5427\uFF0C\u6211\u8FD8\u8FDE\u4E2A\u5C0F\u706B\u7403\u90FD\u653E\u4E0D\u51FA\u6765\u3002</p><p>\u54E6\uFF0C\u5BF9\u4E86\uFF0C\u4E0A\u9762\u7684\u90A3\u6BB5\u8BDD\u662F\u6211\u5728\u8336\u9986\u559D\u8336\u7684\u65F6\u5019\u542C\u8BF4\u4E66\u7684\u5148\u751F\u8BF4\u7684\uFF0C\u603B\u89C9\u5F97\u7A7A\u6307\u9488\u8FD9\u4E2A\u540D\u5B57\u602A\u602A\u7684\uFF0C\u597D\u50CF\u5728\u4EC0\u4E48\u5730\u65B9\u542C\u8BF4\u8FC7\u3002</p><p>\u6211\u7684\u5934\u75DB\u7684\u6BDB\u75C5\u53C8\u72AF\u4E86\uFF0C\u6211\u5DF2\u7ECF\u8BB0\u4E0D\u8D77\u6765\u6211\u4E3A\u4EC0\u4E48\u6765\u5230\u8FD9\u91CC\u4E86\uFF0C\u6211\u53EA\u8BB0\u5F97\u6211\u7684\u540D\u5B57\u53EB\u94C1\u67F1\uFF0C\u5176\u4ED6\u7684\uFF0C\u6211\u53EA\u611F\u89C9\u8FD9\u4E2A\u5947\u602A\u7684\u4E16\u754C\u6709\u4E00\u79CD\u719F\u6089\uFF0C\u4F46\u662F\u6211\u4EC0\u4E48\u90FD\u8BB0\u4E0D\u8D77\u6765\u4E86\u3002</p><p>\u7B97\u4E86\uFF0C\u5F97\u8FC7\u4E14\u8FC7\u5427\u3002</p><p>\u6211\u51C6\u5907\u53BB\u627E\u7A7A\u6307\u9488\u4E86\uFF0C\u867D\u7136\u542C\u8BF4\u4ED6\u5F88\u53EF\u6015\uFF0C\u4F46\u662F\u597D\u50CF\u542C\u8BF4\u4ED6\u4E0D\u662F\u55DC\u6740\u4E4B\u4EBA\uFF0C\u5E94\u8BE5\u4E0D\u4F1A\u6EE5\u6740\u65E0\u8F9C\u5427\uFF0C\u76EE\u524D\u4E3A\u6B62\uFF0C\u6211\u4E5F\u53EA\u5BF9\u8FD9\u4E09\u4E2A\u5B57\u6709\u719F\u6089\u7684\u611F\u89C9\u4E86\uFF0C\u6211\u4E00\u5B9A\u8981\u627E\u5230\u4ED6\uFF0C\u627E\u56DE\u6211\u7684\u8BB0\u5FC6\uFF01</p><p>\u6211\u6253\u542C\u4E86\u5F88\u4E45\uFF0C\u539F\u6765\u7A7A\u6307\u9488\u662F<strong>\u5F02\u5E38\u7EC4\u7EC7</strong>\u7684\u4E09\u4EE3\u5AE1\u4F20\uFF0C\u5F02\u5E38\u7EC4\u7EC7\u662F\u8FD9\u4E2A\u4E16\u754C\u4E0A\u6700\u6050\u6016\u7684\u6740\u624B\u7EC4\u7EC7\uFF0C\u7A7A\u6307\u9488\u5C31\u662F\u5F02\u5E38\u73B0\u5728\u6700\u51FA\u8272\u7684\u523A\u5BA2\u3002</p><p>\u542C\u8BF4\u7A7A\u6307\u9488\u51FA\u751F\u7684\u65F6\u5019\uFF0C\u8116\u5B50\u4E0A\u5C31\u6302\u7740\u4E00\u6839\u9488\uFF0C\u6574\u4E2A Java \u5927\u9646\u96EA\u4E0B\u4E00\u6708\u4E0D\u505C\uFF0CLinux \u68EE\u6797\u591A\u5757\u9646\u5730\u76F4\u63A5\u6C89\u9677\uFF0C\u4E8E\u662F\u4ED6\u7684\u7236\u4EB2\xA0<strong>RuntimeException</strong>\xA0\u5C31\u7ED9\u4ED6\u8D77\u4E86\u7A7A\u6307\u9488\u8FD9\u4E2A\u540D\u5B57\u3002</p><p>\u7A7A\u6307\u9488\u51FA\u751F\u7684\u5929\u751F\u5F02\u8C61\u4E5F\u5F15\u8D77\u4E86\u5F02\u5E38\u7EC4\u7EC7\u9AD8\u5C42\u7684\u6CE8\u610F\uFF0C\u542C\u8BF4\u4ED6\u7684\u7956\u7236\xA0<strong>Exception</strong>\uFF0C\u8FD8\u6709\u6574\u4E2A\u5F02\u5E38\u7EC4\u7EC7\u7684\u9886\u519B\u4EBA\u7269\xA0<strong>Throwable</strong>\xA0\u90FD\u4EB2\u81EA\u63A5\u89C1\u4E86\u7A7A\u6307\u9488\uFF0C\u5E76\u4E14\u8BA4\u4E3A\u7A7A\u6307\u9488\u5929\u8D4B\u5F02\u7980\uFF0C\u672A\u6765\u53EF\u671F\u3002</p><p>\u8981\u77E5\u9053\uFF0C<strong>Throwable</strong>\xA0\u53EF\u662F\xA0<strong>Object</strong>\xA0\u4EB2\u81EA\u4EFB\u547D\u7684\u5F02\u5E38\u7EC4\u7EC7\u5934\u9886\u3002\u4F5C\u4E3A Object \u6700\u503C\u5F97\u4FE1\u4EFB\u7684\u4EB2\u4FE1\uFF0C\u8DDF\u968F Object \u4E07\u5E74\u4EE5\u6765\uFF0C\u6240\u6709\u7684\u810F\u6D3B\u7D2F\u6D3B\u90FD\u4F9D\u9760 Thrwoable \u521B\u7ACB\u7684\u5F02\u5E38\u7EC4\u7EC7\u6765\u5904\u7406\uFF0C\u771F\u53EF\u8C13\u4E00\u4EBA\u4E4B\u4E0B\uFF0C\u4E07\u4EBA\u4E4B\u4E0A\u3002</p><p>Throwable \u53EA\u6709\u4E24\u4E2A\u4EB2\u5B50\uFF0C\u5C31\u662F Error \u548C Exception\uFF0C\u4F20\u8BF4\u4E2D Error \u5FC3\u72E0\u624B\u8FA3\uFF0C\u624B\u4E0B\u65E0\u4E00\u6D3B\u53E3\uFF0C\u89C1\u8FC7 Error \u7684\u4EBA\u8FD8\u80FD\u6D3B\u4E0B\u6765\u7684\u5BE5\u5BE5\u65E0\u51E0\u3002</p><p>\u6574\u4E2A\u5927\u9646\u53EA\u6709\u4ED6\u4EEC\u6050\u6016\u7684\u4F20\u8BF4\uFF0C\u8C01\u4E5F\u4E0D\u77E5\u9053\u4ED6\u4EEC\u4EC0\u4E48\u65F6\u5019\u51FA\u73B0\uFF0C\u4F46\u662F\u4E00\u65E6\u4ED6\u4EEC\u51FA\u73B0\uFF0C\u57FA\u672C\u5BA3\u544A\u7740\u4F60\u5DF2\u7ECF\u662F\u4E2A\u6B7B\u4EBA\u4E86\u3002</p><p>\u800C\u6211\u542C\u8BF4\u8FC7\u6700\u6050\u6016\u7684\u5C31\u662F<code>OutOfMemoryError</code>\xA0\u548C\xA0<code>StackOverflowError</code>\xA0\u8FD9\u4E24\u4F4D\u523A\u5BA2\uFF0C\u56E0\u4E3A\u5927\u9646\u4E0A\u6C38\u8FDC\u6709\u4E00\u5EA7\u98CE\u4E91\u699C\u60AC\u6302\u5728\u5E1D\u90FD\u95E8\u53E3\uFF0C\u800C\u8FD9\u4E24\u4F4D\uFF0C\u4E00\u76F4\u4F4D\u5C45\u6740\u624B\u699C\u699C\u9996\u4F4D\u7F6E\uFF0C\u7A7A\u6307\u9488\u4E5F\u53EA\u53EA\u80FD\u5C48\u5C45\u7B2C\u4E09\u800C\u5DF2\u3002\u5F53\u7136\uFF0C\u5927\u9646\u4E0D\u5C11\u4EBA\u90FD\u8BA4\u4E3A\u7A7A\u6307\u9488\u4F1A\u540E\u6765\u5C45\u4E0A\u3002</p><p>\u6211\u7684\u6D88\u606F\u53EA\u662F\u6253\u542C\u5230\u8FD9\u4E48\u591A\uFF0C\u63A5\u4E0B\u6765\u7684\u65E5\u5B50\uFF0C\u6211\u8D70\u8FC7\u65E0\u6570\u7684\u57CE\u5E02\u3001\u8352\u91CE\uFF0C\u6211\u7A7F\u8FC7\u6C99\u6F20\u3001\u4E1B\u6797\uFF0C\u8FD9\u4E00\u5929\uFF0C\u7EC8\u4E8E\uFF0C\u6211\u6765\u5230\u4E86\u5927\u9646\u7684\u5E1D\u90FD--<strong>\u5806</strong>\u3002</p><p>\u8FD9\u4E2A\u540D\u5B57\u542C\u8D77\u6765\u4E5F\u6709\u70B9\u8033\u719F\uFF0C\u4E0D\u7BA1\u4ED6\uFF0C\u5148\u8FDB\u57CE\u518D\u8BF4\u3002</p><p>\u8FDB\u57CE\u540E\u6211\u53D1\u73B0\u8FD9\u91CC\u975E\u5E38\u8BE1\u5F02\uFF0C\u6574\u5EA7\u57CE\u5E02\u597D\u50CF\u90FD\u975E\u5E38\u5E74\u8F7B\uFF0C\u597D\u50CF\u8FDE\u4E00\u4E2A\u6210\u5E74\u4EBA\u90FD\u6CA1\u6709\uFF01\u8857\u9053\u4E0A\u7199\u7199\u6518\u6518\u7ADF\u7136\u90FD\u662F\u5E74\u8F7B\u4EBA\u3002</p><p>\u5E26\u7740\u7591\u60D1\uFF0C\u6211\u8D70\u8FDB\u4E86\u4E00\u5BB6\u53EB\u505A<em>\u540C\u798F\u5BA2\u6808</em>\u7684\u9152\u697C\u3002</p><p>\u201D\u5BA2\u5B98\uFF0C\u6253\u5C16\u8FD8\u662F\u4F4F\u5E97\u554A\uFF1F\u201C\u4E00\u4E2A\u5C0F\u4E8C\u6A21\u6837\u7684<em>\u5C0F\u5B69</em>\u5E26\u7740\u4E00\u4E1D\u8C04\u5A9A\u7684\u5BF9\u6211\u8BF4\u3002</p><p>\u201D\u4F4F\u5E97\uFF0C\u5E26\u6211\u53BB\u6700\u597D\u7684\u623F\u95F4\uFF0C\u8FD9\u4E9B\u94B1\u5148\u62BC\u4F60\u8FD9\u91CC\uFF0C\u4E0D\u591F\u518D\u8DDF\u6211\u8981\u3002\u201C\u4E00\u8DEF\u8D70\u6765\uFF0C\u5BF9\u4E8E\u8FD9\u4E9B\u5730\u65B9\u7684\u884C\u60C5\u6211\u4E5F\u7B97\u8F7B\u8F66\u719F\u8DEF\u4E86\u3002</p><p>\u201D\u5C0F\u670B\u53CB\uFF0C\u8FD9\u91CC\u662F\u600E\u4E48\u56DE\u4E8B\uFF1F\u4F60\u4EEC\u8FD9\u91CC\u6CA1\u6709\u5927\u4EBA\u5417\uFF1F\u201C\u6211\u4E00\u8FB9\u8D70\u4E00\u8FB9\u95EE\u8FD9\u4E2A\u53EA\u6709\u6211\u4E00\u534A\u8EAB\u9AD8\u7684\u5C0F\u5B69\uFF0C\u6839\u636E\u6211\u76EE\u6D4B\uFF0C\u4ED6\u8EAB\u9AD8\u4E0D\u8D85\u8FC71\u7C73\uFF0C\u5E94\u8BE5\u8FD8\u53EA\u6709\u4E03\u516B\u5C81\u7684\u6837\u5B50\uFF0C\u96BE\u9053\u8FD9\u91CC\u7684\u5546\u4EBA\u5982\u6B64\u9ED1\u5FC3\uFF0C\u7ADF\u7136\u96C7\u4F63\u7AE5\u5DE5\uFF0C\u4E0D\u8FC7\u8FD9\u4E5F\u4E0D\u8C8C\u4F3C\u4E0D\u5BF9\uFF0C\u56E0\u4E3A\u5468\u56F4\u7684\u5BA2\u4EBA\u597D\u50CF\u4E5F\u90FD\u662F\u8FD9\u822C\u5E74\u7EAA\uFF0C\u4ED6\u4EEC\u7ADF\u7136\u8FD8\u6709\u5728\u62BD\u70DF\u559D\u9152\u7684\uFF01</p><p>\u201D\u5BA2\u5B98\u53EF\u771F\u5E7D\u9ED8\uFF0C\u4E0D\u8FC7\u6211\u770B\u5BA2\u5B98\u5E94\u8BE5\u662F\u521A\u6765\u5E1D\u90FD\uFF0C\u4E0D\u7792\u60A8\u8BF4\uFF0C\u6574\u4E2A\u5E1D\u90FD\u5C31\u57FA\u672C\u6CA1\u6709\u8D85\u8FC715\u5C81\u7684\u4EBA\uFF0C\u8D85\u8FC715\u7684\u636E\u8BF4\u90FD\u5728\u53EB\u505A\u8001\u5E74\u533A\u7684\u517B\u8001\u53BB\u4E86\uFF01\u5C31\u62FF\u6211\u6765\u8BF4\u5427\uFF0C\u6211\u4ECA\u5E74\u53EF\u4E0D\u5C0F\u4E86\uFF0C\u6211\u90FD8\u5C81\u4E86\uFF0C\u50CF\u6211\u8FD9\u822C\u5E74\u7EAA\u7684\u5DF2\u7ECF\u534A\u622A\u817F\u8FC8\u8FDB\u68FA\u6750\u54AF\u3002\u54CE\uFF0C\u8FD9\u8EAB\u5B50\u4E5F\u662F\u4E00\u5E74\u4E0D\u5982\u4E00\u5E74\u4E86\u3002\u201C</p><p>\u770B\u7740\u8FD9\u4E2A\u5C0F\u4E8C\u4E00\u8138\u8BA4\u771F\u7684\u6837\u5B50\uFF0C\u6211\u8D8A\u53D1\u89C9\u5F97\u8FD9\u5EA7\u57CE\u5E02\u8BE1\u5F02\u8D77\u6765\u4E86\uFF018\u5C81\uFF0C\u4EC0\u4E48\u9B3C\uFF1F8\u5C81\u4E0D\u662F\u5E94\u8BE5\u5728\u5BB6\u91CC\u770B\u559C\u7F8A\u7F8A\u5417\uFF1F\uFF01\u8FD8\u534A\u622A\u817F\u8FC8\u8FDB\u68FA\u6750\uFF01</p><p>\u201D\u53EF\u662F\u4F60\u770B\u6211\u6BD4\u4F60\u9AD8\u8FD9\u4E48\u591A\uFF0C\u4F60\u4E0D\u89C9\u5F97\u5947\u602A\u5417\uFF1F\u201C\u6211\u5947\u602A\u7684\u95EE\u4ED6\u3002</p><p>\u201D\u6709\u4EC0\u4E48\u597D\u5947\u602A\u7684\uFF0C\u8981\u4E0D\u662F\u6211\u5C0F\u65F6\u5019\u559D\u591A\u4E86\u4E09\u9E7F\uFF0C\u6CA1\u51C6\u6211\u4E5F\u957F\u8FD9\u4E48\u9AD8\u4E86\uFF01\u201C\u5C0F\u4E8C\u6709\u70B9\u751F\u6C14\u7684\u5BF9\u6211\u8BF4\u3002</p><p>\u884C\u5427\uFF0C\u518D\u8BF4\u4E24\u53E5\u628A\u4ED6\u6FC0\u6012\u4E86\uFF0C\u8DF3\u8D77\u6765\u6253\u6211\u819D\u76D6\u5C31\u5927\u4E8B\u4E0D\u5999\u4E86\u3002</p><p>\u63A5\u4E0B\u6765\u7684\u51E0\u5929\uFF0C\u7ECF\u8FC7\u6211\u7684\u6253\u63A2\uFF0C\u539F\u6765\u6211\u5728\u7684\u5730\u65B9\u662F\u53EB\u505A\u5E74\u8F7B\u533A\uFF0C\u6574\u4E2A\u5E1D\u90FD\u5C31\u53EA\u6709\u8FD9\u4E24\u4E2A\u533A\u57DF\uFF0C\u5E74\u8F7B\u533A\u7684\u4EBA\u5E74\u9F84\u786E\u5B9E\u6CA1\u6709\u8D85\u8FC715\u5C81\u7684\uFF0C\u6709\u4E9B\u4EBA\u521A\u51FA\u751F\u6CA1\u51E0\u5929\u5C31\u6B7B\u4E86\uFF0C\u5BF9\u6B64\uFF0C\u751F\u6D3B\u5728\u8FD9\u91CC\u7684\u4EBA\u4E5F\u89C1\u602A\u4E0D\u602A\u4E86\u3002\u5BF9\u4E8E\u4ED6\u4EEC\u6765\u8BF4\uFF0C\u5BC4\u5E0C\u671B\u80FD\u6D3B\u5230\u8D85\u8FC715\u5C81\u8FDB\u5165\u8001\u5E74\u533A\u517B\u8001\u5C31\u662F\u4ED6\u4EEC\u7684\u68A6\u60F3\u3002</p><p>\u6211\u5728\u6000\u7591\u662F\u4E0D\u662F\u5F02\u5E38\u7EC4\u7EC7\u5728\u8FD9\u91CC\u6697\u6740\uFF0C\u53EF\u662F\u53D1\u73B0\u7ED3\u679C\u5E76\u4E0D\u662F\uFF0C\u8FD9\u91CC\u7684\u4EBA\u8C8C\u4F3C\u5DF2\u7ECF\u4E60\u60EF\u4E86\uFF0C\u751F\u6D3B\u5BF9\u4ED6\u4EEC\u6765\u8BF4\u5C31\u662F\u968F\u4FBF\u6D3B\u6D3B\u5C31\u597D\u4E86\uFF0C\u6BCF\u6B21\u7684\u6B7B\u4EA1\u5BF9\u4E8E\u4ED6\u4EEC\u6765\u8BF4\u6BEB\u65E0\u5F81\u5146\uFF0C\u53EF\u80FD\u521A\u8E22\u7740\u7403\u5462\uFF0C\u5C31\u7A81\u7136\u6302\u4E86\uFF0C\u6709\u7684\u4E0A\u7740\u5395\u6240\u7A81\u7136\u5C31\u6B7B\u4E86\uFF0C\u4E34\u6B7B\u524D\u8FDE\u4E2A\u5C41\u80A1\u90FD\u6CA1\u64E6\uFF0C\u4E0D\u8BF4\u4E86\uFF0C\u6709\u70B9\u6076\u5FC3\u3002</p><p>\u5C31\u5728\u6211\u7B49\u7684\u4E0D\u8010\u70E6\u60F3\u6253\u7B97\u53BB\u8001\u5E74\u533A\u770B\u770B\u7684\u65F6\u5019\uFF0C\u4E00\u4E2A\u7A7F\u7740\u9ED1\u8863\u7684\u4EBA\u627E\u5230\u4E86\u6211\u3002</p><p>\u201D\u4F60\u662F\u8C01\uFF1F\u201C\u6211\u8B66\u60D5\u7684\u95EE\u4ED6\u3002</p><p>\u201D\u672C\u5EA7IOException\u3002\u201C\u9ED1\u8863\u4EBA\u795E\u60C5\u51B0\u51B7\u7684\u770B\u7740\u6211\u8BF4\u3002</p><p>\u201D\u4F60\u627E\u6211\u4EC0\u4E48\u4E8B\uFF1F\u201C</p><p>\u201D\u8FD9\u4E9B\u4F60\u4E0D\u7528\u77E5\u9053\uFF0C\u8DDF\u6211\u8D70\u4E00\u8D9F\u5427\uFF01\u201C</p><p>\u6211\u521A\u60F3\u8BF4\u8BDD\u62D2\u7EDD\uFF0C\u5F00\u4EC0\u4E48\u73A9\u7B11\uFF0C\u8DDF\u4F60\u4EEC\u5F02\u5E38\u7EC4\u6253\u4EA4\u9053\u7684\u4EBA\u975E\u6B7B\u5373\u6B8B\uFF0C\u8C01\u8981\u8DDF\u4F60\u53BB\u3002</p><p>\u4F46\u662F\u7531\u4E0D\u5F97\u6211\u62D2\u7EDD\uFF0C\u6211\u53EA\u611F\u89C9\u4E00\u9635\u5929\u65CB\u5730\u8F6C\uFF0C\u6211\u611F\u89C9\u6211\u5728\u5929\u4E0A\u98DE\uFF0C\u7136\u540E\u6211\u5C31\u5931\u53BB\u4E86\u610F\u8BC6\u3002\u5F53\u6211\u9192\u6765\u7684\u65F6\u5019\uFF0C\u6211\u53D1\u73B0\u6211\u8EBA\u5728\u4E00\u5F20\u5DE8\u5927\u7684\u5E8A\u4E0A\uFF0C\u684C\u5B50\u4E0A\u70B9\u7740\u4E00\u652F\u6A80\u9999\uFF0C\u6574\u4E2A\u623F\u95F4\u53EA\u6709\u4E00\u5F20\u684C\u5B50\u3001\u4E00\u628A\u6905\u5B50\u548C\u6211\u8EBA\u7684\u5730\u65B9\u3002</p><p>\u623F\u95F4\u5F88\u5C0F\uFF0C\u5E94\u8BE5\u53EA\u670910\u51E0\u4E2A\u5E73\u65B9\uFF0C\u4F46\u662F\u6211\u7ADF\u7136\u53C8\u6709\u4E00\u79CD\u719F\u6089\u7684\u611F\u89C9\uFF0C\u8FD9\u79CD\u611F\u89C9\u8426\u7ED5\u5728\u6211\u5FC3\u5934\u6325\u6563\u4E0D\u53BB\u3002</p><p>\u6CA1\u7B49\u6211\u518D\u60F3\u66F4\u591A\uFF0C\u623F\u95E8\u6253\u5F00\u4E86\u3002</p><p>\u201D\u662F\u4F60\uFF0C\u4F60\u628A\u6211\u5E26\u6765\u5E72\u4EC0\u4E48\uFF1F\u201C</p><p>\u201D\u8D70\u5427\uFF0C\u6709\u4EBA\u8981\u89C1\u4F60\u3002\u201C</p><p>\u8FD8\u662F\u4E0D\u5BB9\u6211\u6297\u62D2\uFF0C\u5982\u679C\u6211\u7684\u6218\u6597\u529B\u662F5\u7684\u8BDD\uFF0C\u6211\u60F3\uFF0CIO\u4ED6\u8BE5\u6709\u597D\u51E0\u4E07\u4E86\u5427\u3002</p><p>\u53C8\u662F\u8FD9\u8BE5\u6B7B\u7684\u7729\u6655\u611F\uFF0C\u4E0D\u8FC7\u8FD9\u6B21\u6CA1\u6709\u51E0\u79D2\u949F\uFF0C\u6211\u5C31\u53D1\u73B0\u6211\u5728\u4E00\u4E2A\u82B1\u56ED\u91CC\uFF0C\u82B1\u56ED\u4E2D\u95F4\u4E00\u4E2A\u8EAB\u7A7F\u9EC4\u888D\u7684\u4E2D\u5E74\u4EBA\u6B63\u5728\u6162\u60A0\u60A0\u7684\u559D\u8336\u3002\u5728\u4ED6\u8EAB\u4E0A\u6211\u611F\u53D7\u4E0D\u5230\u4EFB\u4F55\u5F3A\u5927\u7684\u6C14\u606F\uFF0C\u751A\u81F3\u4E0D\u5982IOException\u7ED9\u6211\u7684\u538B\u8FEB\u611F\u5F3A\u70C8\u3002\u8FD9\u662F\u8C01\uFF1F</p><p>\u4E0D\u7B49\u6211\u601D\u7EEA\u98D8\u98DE\uFF0CIOException\u5F2F\u8170\u8EAC\u8EAB\u8BF4\u9053\uFF1A\u201D\u965B\u4E0B\uFF0C\u4EBA\u5E26\u8FC7\u6765\u4E86\u3002\u201C</p><p>\u201D\u55EF\uFF0C\u4F60\u9000\u4E0B\u5427\u3002\u201C\u4E2D\u5E74\u4EBA\u8F6C\u8FC7\u8EAB\u6765\uFF0C\u8138\u4E0A\u4E1D\u6BEB\u770B\u4E0D\u51FA\u60C5\u7EEA\u7684\u8BF4\u9053\u3002</p><p>\u6211\u5927\u6982\u731C\u5230\u4E86\u8FD9\u662F\u54EA\u91CC\u4E86\uFF0C\u4E8E\u662F\u4E5F\u653E\u4E0B\u5FC3\u6765\uFF0C\u5728\u8FD9\u91CC\uFF0C\u6216\u8BB8\u80FD\u627E\u5230\u6211\u7684\u7B54\u6848\u3002</p><p>\u53CD\u6B63\u4ED6\u8981\u5BF9\u6211\u600E\u4E48\u6837\uFF0C\u6211\u4E5F\u6CA1\u6709\u529E\u6CD5\u53CD\u6297\uFF0C\u6211\u5F84\u76F4\u5750\u5230\u4ED6\u7684\u5BF9\u9762\uFF0C\u770B\u7740\u4ED6\u8BF4\uFF1A\u201D\u60A8\u5C31\u662FObject\u965B\u4E0B\u5427\uFF0C\u4E0D\u77E5\u627E\u6211\u6240\u8C13\u4F55\u4E8B\uFF1F\u201C</p><p>\u4E2D\u5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...\u8FD9\u4E2A\u6C14\u6C1B\u8BA9\u6211\u611F\u89C9\u5F88\u4E0D\u8212\u670D\u3002\u5C31\u5728\u6211\u53D7\u4E0D\u4E86\u60F3\u8BF4\u8BDD\u7684\u65F6\u5019\uFF0CObject\u7A81\u7136\u8BF4\u4E86\u4E00\u53E5\uFF1A\u201C\u5E26\u4ED6\u53BB\u89C1\u7A7A\u6307\u9488\u5427\u3002\u201D</p><p>\u201C\u662F\uFF0C\u965B\u4E0B\uFF01\u201D\u7A81\u7136\uFF0C\u4E00\u4E2A\u8EAB\u7A7F\u7EA2\u888D\u7684\u67AF\u7626\u8001\u8005\u51FA\u73B0\u5728\u6211\u80CC\u540E\uFF0C\u628A\u6211\u5413\u4E86\u4E00\u8DF3\u3002</p><p>\u6211\u4E5F\u4E0D\u60F3\u518D\u591A\u751F\u4E8B\u7AEF\uFF0C\u76F4\u89C9\u544A\u8BC9\u6211\u8FD9\u91CC\u4E0D\u662F\u4E45\u7559\u4E4B\u5730\uFF0C\u867D\u7136\u6709\u70B9\u83AB\u540D\u5176\u5999\uFF0C\u6211\u8FD8\u662F\u8DDF\u7740\u7EA2\u888D\u8001\u8005\u6765\u8D70\u4E86\u3002</p><p>... ...</p><p>\u201C\u965B\u4E0B\uFF0C\u662F\u4ED6\u5417\uFF1F\u201D\u4E00\u4E2A\u5149\u5934\u5927\u6C49\u7684\u8EAB\u5F71\u5728\u534A\u7A7A\u82E5\u5F71\u82E5\u73B0\u7684\u8BF4\u9053\u3002</p><p>\u201C\u8FD8\u4E0D\u80FD\u786E\u5B9A... \u4E0D\u8FC7\uFF0C\u7559\u7ED9\u6211\u4EEC\u7684\u65F6\u95F4\u4E0D\u591A\u4E86\uFF0C\u4E0B\u4E00\u6B21\u7684\u8F6E\u56DE\u5C31\u5FEB\u6765\u4E86\u3002\u201D</p><p>\u201C\u8F6E\u56DE\uFF0C\u53C8\u662F\u8F6E\u56DE\u3002\u6211\u4EEC\u8FD8\u6709\u5E0C\u671B\u5417\uFF1F\u201D\u5927\u6C49\u5462\u5583\u7740\uFF0C\u4E0D\u77E5\u9053\u662F\u5BF9\u81EA\u5DF1\u8BF4\u8FD8\u662F\u5BF9\u4E2D\u5E74\u4EBA\u8BF4\u3002</p><p>\u4E2D\u5E74\u4EBA\u4F9D\u7136\u80CC\u7740\u624B\uFF0C\u62AC\u5934\u671B\u7740\u6F2B\u5929\u7684\u67F3\u7D6E\u8BF4\u9053\uFF1A\u201C\u8FD9\u4E00\u4E16\uFF0C\u8BE5\u662F\u4E2A\u4E86\u65AD\u4E86\u3002\u201D</p><p>... ...</p><p>\u6CA1\u591A\u4E45\uFF0C\u4ED6\u628A\u6211\u5E26\u5230\u4E00\u4E2A\u623F\u95F4\u95E8\u53E3\uFF0C\u4E5F\u662F\u9762\u65E0\u8868\u60C5\u7684\u8BF4\u9053\uFF1A\u201C\u8FDB\u53BB\u5427\uFF0C\u7A7A\u6307\u9488\u5C31\u5728\u91CC\u9762\u3002\u201D</p><p>\u6211\u633A\u4F4F\u811A\u6B65\uFF0C\u8F6C\u8FC7\u8EAB\u95EE\u4ED6\uFF1A\u201C\u4F60\u662F\u8C01\uFF1F\u6211\u4EEC\u662F\u4E0D\u662F\u89C1\u8FC7\uFF1F\u201D</p><p>\u7EA2\u888D\u8001\u8005\u602A\u5F02\u4E00\u7B11\uFF1A\u201C\u4E5F\u8BB8\u5427\uFF0C\u8001\u592B<code>IndexOutOfBoundsException</code>\uFF0C\u7A7A\u6307\u9488\u4FBF\u662F\u6211\u597D\u53CB\u3002\u201D</p><p>\u8FD9\u4E2A\u540D\u5B57\u53EF\u771F\u957F\uFF0C\u6211\u542C\u8BF4\u8FC7\u4ED6\uFF0C\u636E\u4F20\u95FB\u4ED6\u7684\u5B9E\u529B\u4E5F\u975E\u5E38\u4E4B\u5F3A\uFF0C\u53EF\u80FD\u4E0D\u4E0B\u4E8E\u7A7A\u6307\u9488\uFF0C\u90FD\u662F\u4EE5\u8BE1\u5F02\u7684\u51FA\u624B\u89D2\u5EA6\u8457\u79F0\uFF0C\u4E0D\u8FC7\u76F8\u6BD4\u4E8E\u7A7A\u6307\u9488\u7684\u5927\u540D\uFF0C\u4ED6\u597D\u50CF\u66F4\u4F4E\u8C03\uFF0C\u96BE\u602A\u5728\u7687\u5BAB\u5F53\u4E2A\u8001\u592A\u76D1\u4E00\u822C\u3002</p><p>\u6211\u4E5F\u4E0D\u5728\u591A\u60F3\uFF0C\u70B9\u70B9\u5934\uFF0C\u8D70\u8FDB\u4E86\u623F\u95F4\u3002\u521A\u8FDB\u623F\u95F4\uFF0C\u6211\u5C31\u770B\u89C1\u4E00\u4E2A\u4E00\u8EAB\u767D\u8863\u7684\u8EAB\u5F71\u80CC\u5BF9\u7740\u6211\uFF0C\u7B14\u76F4\u7684\u8EAB\u5F71\u597D\u50CF\u8981\u51B2\u7834\u5929\u9645\uFF0C\u8EAB\u4E0A\u7684\u6C14\u52BF\u5F3A\u5927\u65E0\u6BD4\uFF0C\u81F3\u5C11\u5728\u6211\u89C1\u8FC7\u7684\u6240\u6709\u4EBA\u91CC\u8DB3\u4EE5\u6392\u8FDB\u524D\u4E09\u4E86\u3002\u7A7A\u6307\u9488\uFF0C\u679C\u7136\u540D\u4E0D\u865A\u4F20\uFF01</p><p>\u6211\u8D70\u5230\u623F\u95F4\u4E2D\u592E\uFF0C\u73AF\u76EE\u56DB\u671B\u624D\u53D1\u73B0\u8FD9\u597D\u50CF\u662F\u4E00\u5EA7\u7960\u5802\u7684\u6837\u5B50\uFF0C\u5C31\u5728\u6211\u8FD8\u5728\u6253\u91CF\u56DB\u5468\u4E4B\u9645\uFF0C\u4E00\u9053\u6E05\u51B7\u7684\u58F0\u97F3\u4F20\u5230\u6211\u7684\u8033\u8FB9\uFF1A</p><p>\u201C\u4F60\u8EAB\u4E0A\u7684\u6C14\u606F\u8BA9\u6211\u975E\u5E38\u8BA8\u538C\uFF01\u201D</p><p>\u4ED6\u8F6C\u8FC7\u8EAB\u6765\uFF0C\u6211\u53D1\u73B0\u6211\u6839\u672C\u770B\u4E0D\u6E05\u7A7A\u6307\u9488\u957F\u4EC0\u4E48\u6837\u5B50\uFF0C\u4ED6\u7684\u8138\u597D\u50CF\u6253\u4E0A\u4E86\u9A6C\u8D5B\u514B\u3002\u542C\u5230\u4ED6\u7684\u8BDD\uFF0C\u6211\u5FC3\u91CC\u7684\u7591\u60D1\u66F4\u591A\u4E86\uFF0C\u6211\u53EA\u662F\u89C9\u5F97\u4ED6\u7684\u6C14\u606F\u8BA9\u6211\u611F\u5230\u975E\u5E38\u719F\u6089\uFF0C\u4ED6\u7684\u8BDD\u8BA9\u6211\u6709\u70B9\u83AB\u540D\u5176\u5999\u3002\u4E8E\u662F\u6211\u8BD5\u63A2\u9053\uFF1A</p><p>\u201C\u4F60\u77E5\u9053\u6211\u662F\u8C01\uFF1F\u201D</p><p>\u542C\u5230\u6211\u7684\u8BDD\uFF0C\u4ED6\u4E00\u6B65\u6B65\u8D70\u8FDB\u6211\uFF0C\u5728\u6211\u8EAB\u8FB9\u95FB\u4E86\u95FB\uFF0C\u8FD9\u8BA9\u6211\u4EC0\u4E48\u4E00\u7D27\uFF0C\u867D\u7136\u6211\u60F3\u641E\u6E05\u695A\u6211\u8EAB\u4E0A\u7684\u95EE\u9898\uFF0C\u4F46\u662F\u6211\u4E0D\u662F\u51FA\u5356\u8089\u4F53\u7684\u4EBA\uFF0C\u6211\u9000\u540E\u4E00\u6B65\u8BF4\uFF1A</p><p>\u201C\u4F60\u60F3\u5E72\u561B\uFF1F\u201D</p><p>\u7A7A\u6307\u9488\u76B1\u7D27\u4E86\u7709\u5934\uFF0C\u4EFF\u4F5B\u81EA\u8A00\u81EA\u8BED\u9053\uFF1A\u201C\u4E0D\u5BF9\uFF0C\u4E0D\u5BF9\uFF0C\u8FD9\u662F... \u89C4\u5219\u7684\u6C14\u606F\uFF1F\u53EF\u662F\u4ED6\u660E\u660E\u8EAB\u4E0A\u6CA1\u6709\u4EFB\u4F55\u80FD\u91CF\u6CE2\u52A8\u3002\u201D</p><p>\u6211\u89C1\u4ED6\u597D\u50CF\u9B54\u6014\u4E86\uFF0C\u4EFF\u4F5B\u5728\u601D\u8003\u4EC0\u4E48\uFF0C\u4E8E\u662F\u8FC8\u6B65\u8D70\u5230\u4ED6\u521A\u624D\u7AD9\u7ACB\u7684\u5730\u65B9\u770B\u7740\u524D\u9762\uFF0C\u539F\u6765\uFF0C\u8FD9\u662F\u4ED6\u4EEC\u7684\u65CF\u8C31\uFF01\u8FD9\u91CC\u662F\u5F02\u5E38\u7684\u7960\u5802\uFF01</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/exception/npe-1.jpg" alt=""></p><p>\u770B\u5B8C\u8FD9\u5F20\u65CF\u8C31\uFF0C\u6211\u604D\u7136\u5927\u609F\uFF0C\u597D\u50CF\u660E\u767D\u4E86\u4EC0\u4E48\u3002\u7A81\u7136\uFF0C\u6211\u7684\u8111\u888B\u91CC\u51FA\u73B0\u4E86\u4E00\u4E2A\u51B0\u51B7\u7684\u673A\u5668\u58F0\u97F3\uFF1A\u201C\u83B7\u53D6\u5F02\u5E38\u65CF\u8C31\uFF0C\u5386\u7EC3\u5B8C\u6210\u5EA6+100\u3002\u201D</p><p>\u6211Kao\uFF0C\u7CFB\u7EDF\uFF0C\u8FD9\u662F\u7CFB\u7EDF\u554A\uFF0C\u6211\u4E0D\u7981\u5185\u725B\u6EE1\u9762\uFF0C\u5565\u4EFB\u52A1\u7CFB\u7EDF\u554A\uFF0C\u4E00\u70B9\u63D0\u793A\u90FD\u6CA1\u6709\uFF0C\u6211\u8D76\u7D27\u558A\u9053\uFF1A</p><p>\u201C\u7CFB\u7EDF\uFF0C\u7CFB\u7EDF\uFF0C\u8FD8\u5728\u5417\uFF1F\u5728\u7EBF\u7B49\uFF0C\u633A\u7740\u6025\u7684\u3002\u201D\u53EF\u662F\u6CA1\u6709\u4EFB\u4F55\u56DE\u590D\uFF01\u8FD9\u5565\u7834\u7CFB\u7EDF\uFF01\u5C31\u5728\u6211\u60F3\u7834\u53E3\u5927\u9A82\u7684\u65F6\u5019\uFF0C\u7A7A\u6307\u9488\u770B\u5230\u6211\u548C\u4E2A\u4E8C\u50BB\u5B50\u4F3C\u7684\u5927\u547C\u5C0F\u53EB\uFF0C\u7A81\u7136\u4E00\u8138\u4E0D\u53EF\u601D\u8BAE\u7684\u5BF9\u7740\u6211\u8BF4\uFF1A</p><p>\u201C\u4F60\u660E\u609F\u4E86\u89C4\u5219\uFF1F\u201D</p><p>\u6211\u6123\u4E86\u6123\uFF0C\u55EF\uFF1F\u96BE\u9053\u6211\u4E0D\u662F\u62185\u6E23\u4E86\uFF1F\u89C4\u5219\u4E4B\u529B\uFF1F\u597D\u50CF\u662F\u5F88\u9AD8\u7AEF\u7684\u6837\u5B50\u554A\uFF1F</p><p>\u201C\u6492\u8C46\u6210\u5175\uFF01\u201D</p><p>\u201C\u547C\u98CE\uFF01\u201D</p><p>\u201D\u5524\u96E8\uFF01\u201C</p><p>\u201D\u4E34\u5175\u6597\u8005\u7686\u9635\u5217\u5728\u524D\uFF01\u201C</p><p>\u4E00\u70B9\u53CD\u5E94\u90FD\u6CA1\u6709\u3002\u3002\u3002\u5565\u73A9\u610F\u513F\uFF1F\u8FD8\u89C4\u5219\u4E4B\u529B\uFF1F\u4E5D\u5B57\u771F\u8A00\u90FD\u6CA1\u7528\u554A\uFF1F</p><p>\u7A7A\u6307\u9488\u597D\u50CF\u90FD\u8499\u4E86\uFF0C\u4ED6\u6572\u4E86\u6572\u592A\u9633\u7A74\uFF0C\u65E0\u8BED\u7684\u770B\u7740\u6211\u8BF4\uFF1A</p><p>\u201D\u4F60\u4E0D\u662F\u6765\u627E\u6211\u7684\u5417\uFF1F\u8BF4\u5B8C\u4F60\u7684\u95EE\u9898\uFF0C\u7136\u540E\u7ED9\u6211\u6EDA\uFF01\u201C</p><p>\u5BF9\u554A\uFF0C\u8FD9\u7CFB\u7EDF\u628A\u6211\u6574\u7684\u6211\u90FD\u5FD8\u8BB0\u6211\u6765\u5E72\u561B\u7684\u4E86\uFF0C\u6211\u8D76\u7D27\u8BF4\uFF1A</p><p>\u201D\u4F60\u8BA4\u8BC6\u6211\u5BF9\u4E0D\u5BF9\uFF0C\u4F60\u662F\u4E0D\u662F\u89C9\u5F97\u6211\u6709\u4E00\u79CD\u719F\u6089\u7684\u611F\u89C9\uFF1F\u6211\u60F3\u77E5\u9053\u6211\u7684\u6765\u5386\uFF01\u201C</p><p>\u7A7A\u6307\u9488\u53C8\u6123\u4E86\u6123\uFF0C\u4ED6\u770B\u7740\u6211\uFF0C\u6C89\u9ED8\u4E86\u4E00\u4F1A\u513F\uFF0C\u56DE\u9053\uFF1A\u201C\u4E0D\u77E5\u9053\uFF01\u201D</p><p>\u6211\u6709\u70B9\u5947\u602A\uFF0C\u770B\u4ED6\u4E00\u8138\u4FBF\u79D8\u7684\u8868\u60C5\u5E94\u8BE5\u662F\u89C1\u8FC7\u6211\u7684\uFF0C\u4ED6\u4E00\u5B9A\u5728\u6492\u8C0E\uFF0C\u65E2\u7136\u5982\u6B64...</p><p>\u201C\u90A3\u4F60\u544A\u8BC9\u6211\u4F60\u4EEC\u6709\u4EC0\u4E48\u529E\u6CD5\u80FD\u5728\u4F60\u4EEC\u5F02\u5E38\u7684\u653B\u51FB\u4E0B\u9632\u8EAB\u5427\uFF1F\u201D</p><p>\u7A7A\u6307\u9488\u5927\u6012\uFF0C\u521A\u60F3\u8D77\u8EAB\u8BF4\u8BDD\uFF0C\u7A7A\u4E2D\u7A81\u7136\u4F20\u6765\u4E00\u9053\u58F0\u97F3\uFF1A\u7B54\u5E94\u4ED6\u7684\u8981\u6C42\uFF01</p><p>\u4ED6\u51B7\u54FC\u4E00\u58F0\uFF0C\u4E22\u7ED9\u6211\u4E00\u672C\u4E66\uFF0C\u4E0A\u9762\u5199\u7740<strong>catch</strong>\u4E00\u4E2A\u5B57\uFF0C\u8FD8\u6709\u4E00\u5757\u5199\u7740<strong>catch</strong>\u7684\u4EE4\u724C\uFF0C\u51B0\u51B7\u7684\u8BF4\u5230\uFF1A\u201C\u4F60\u60F3\u77E5\u9053\u7684\u90FD\u5728\u8FD9\u91CC\u4E86\u3002\u201D\u8BF4\u5B8C\uFF0C\u62C2\u8896\u800C\u53BB\u3002</p><p>\u6211\u770B\u7740\u684C\u5B50\u4E0A\u7684\u8FD9\u672C\u4E66\uFF0C\u60F3\u4E86\u60F3\u8FD8\u662F\u7FFB\u9605\u8D77\u6765\u3002</p><p>\u539F\u6765<code>Exception</code>\xA0\u548C\u5B83\u7684\u513F\u5B50\u4EEC\uFF0C\u9664\u4E86<code>RuntimeException</code>\xA0\u4E00\u652F\uFF0C\u90FD\u53EB\u4F5C<code>Checked Exception</code>\uFF0C\u6211\u8FD8\u80FD\u7528catch\u4EE4\u724C\u6765\u5BF9\u6297\u4ED6\u4EEC\u7684\u653B\u51FB\uFF01\u5305\u62EC\u7A7A\u6307\u9488\uFF0C\u4EE5\u540E\u6211\u5C31\u4E0D\u6015\u4ED6\u4EEC\u4E86\uFF01</p><p>\u53EF\u662F\uFF0C\u4ED6\u4E3A\u4EC0\u4E48\u8981\u7ED9\u6211\uFF0C\u770B\u4ED6\u521A\u624D\u7684\u6837\u5B50\u90FD\u60F3\u6253\u6211\u4E86\uFF0C\u53C8\u7A81\u7136\u7ED9\u4E86\u6211\u8FD9\u4E9B\uFF1F\u8FD8\u6709\u4ED6\u4E00\u76F4\u5728\u8BF4\u7684\u89C4\u5219\u4E4B\u529B\u53C8\u662F\u4EC0\u4E48\uFF1F\u8FD9\u5EA7\u57CE\u5E02\u4E3A\u4EC0\u4E48\u53C8\u8FD9\u4E48\u8BE1\u5F02\uFF1F</p><blockquote><p>\u8F6C\u8F7D\u94FE\u63A5\uFF1Ahttps://mp.weixin.qq.com/s/PDfd8HRtDZafXl47BCxyGg</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p>',108),c=[n];function a(s,i){return e(),t("div",null,c)}var l=p(r,[["render",a],["__file","npe.html.vue"]]);export{l as default};
+import{_ as p}from"./plugin-vue_export-helper.21dcd24c.js";import{o as e,c as t,e as o}from"./app.615e41d8.js";const r={},n=o('<h1 id="java\u7A7A\u6307\u9488nullpointerexception\u7684\u4F20\u8BF4" tabindex="-1"><a class="header-anchor" href="#java\u7A7A\u6307\u9488nullpointerexception\u7684\u4F20\u8BF4" aria-hidden="true">#</a> Java\u7A7A\u6307\u9488NullPointerException\u7684\u4F20\u8BF4</h1><p><strong>\u7A7A\u6307\u9488</strong>\uFF0C\u53F7\u79F0\u5929\u4E0B\u6700\u5F3A\u523A\u5BA2\u3002</p><p>\u4ED6\u539F\u672C\u4E0D\u53EB\u8FD9\u4E2A\u540D\u5B57\uFF0C\u7A7A\u6307\u9488\u539F\u672C\u590D\u59D3<strong>\u5F02\u5E38</strong>\uFF0C\u7A7A\u6307\u9488\u53EA\u4E0D\u8FC7\u662F\u4ED6\u7684\u6B66\u5668\uFF0C\u4F46\u4ED6\u6740\u622E\u8FC7\u591A\uFF0C\u6E10\u6E10\u5730\u4EBA\u4EEC\u53EA\u8BB0\u4F4F\u4E86\u7A7A\u6307\u9488\u8FD9\u4E09\u4E2A\u5B57\u3002</p><p>\u5929\u4E0B\u6B66\u529F\uFF0C\u552F\u5FEB\u4E0D\u7834\uFF0C\u7A7A\u6307\u9488\u7684\u9488\uFF0C\u4EE5\u5FEB\u548C\u8BE1\u5F02\u8457\u79F0\uFF0C\u7A0D\u6709\u4E0D\u614E\uFF0C\u4FBF\u662F\u4F24\u4EA1\u3002</p><p>... ...</p><p>\u6211\u53EB\u94C1\u67F1\uFF0C\u6211\u6765\u5230\u8FD9\u4E2A\u5947\u602A\u7684\u4E16\u754C\u5DF2\u7ECF\u4E00\u5E74\u4E86\uFF0C\u6211\u7B49\u4E86\u4E00\u5E74\uFF0C\u7A7F\u8D8A\u9644\u8D60\u7684\u8001\u7237\u7237\u3001\u6212\u6307\u3001\u7CFB\u7EDF\u4EC0\u4E48\u7684\u6211\u5230\u73B0\u5728\u90FD\u6CA1\u53D1\u73B0\u3002</p><p>\u800C\u4E14\u8FD9\u4E2A\u4E16\u754C\u770B\u8D77\u6765\u4E5F\u592A\u5947\u602A\u4E86\uFF0C\u8FD9\u91CC\u597D\u50CF\u53EB\u4EC0\u4E48\xA0<strong>Java</strong>\xA0\u5927\u9646\uFF0C\u6211\u53EA\u77E5\u9053\u8FD9\u4E2A\u4E16\u754C\u7684\u6700\u5F3A\u8005\u53EB\u505A\xA0<strong>Object</strong>\uFF0C\u542C\u8BF4\u662F\u4EC0\u4E48\u9053\u7956\u7EA7\u7684\u5B58\u5728\uFF0C\u6211\u4E5F\u4E0D\u77E5\u9053\u662F\u4EC0\u4E48\u610F\u601D\uFF0C\u6BD5\u7ADF\u6211\u73B0\u5728\u597D\u50CF\u8FD8\u662F\u4E2A\u83DC\u9E21\uFF0C\u522B\u7684\u4E3B\u89D2\u4E00\u5E74\u90FD\u5E94\u8BE5\u8981\u98DE\u5347\u4ED9\u754C\u4E86\u5427\uFF0C\u6211\u8FD8\u8FDE\u4E2A\u5C0F\u706B\u7403\u90FD\u653E\u4E0D\u51FA\u6765\u3002</p><p>\u54E6\uFF0C\u5BF9\u4E86\uFF0C\u4E0A\u9762\u7684\u90A3\u6BB5\u8BDD\u662F\u6211\u5728\u8336\u9986\u559D\u8336\u7684\u65F6\u5019\u542C\u8BF4\u4E66\u7684\u5148\u751F\u8BF4\u7684\uFF0C\u603B\u89C9\u5F97\u7A7A\u6307\u9488\u8FD9\u4E2A\u540D\u5B57\u602A\u602A\u7684\uFF0C\u597D\u50CF\u5728\u4EC0\u4E48\u5730\u65B9\u542C\u8BF4\u8FC7\u3002</p><p>\u6211\u7684\u5934\u75DB\u7684\u6BDB\u75C5\u53C8\u72AF\u4E86\uFF0C\u6211\u5DF2\u7ECF\u8BB0\u4E0D\u8D77\u6765\u6211\u4E3A\u4EC0\u4E48\u6765\u5230\u8FD9\u91CC\u4E86\uFF0C\u6211\u53EA\u8BB0\u5F97\u6211\u7684\u540D\u5B57\u53EB\u94C1\u67F1\uFF0C\u5176\u4ED6\u7684\uFF0C\u6211\u53EA\u611F\u89C9\u8FD9\u4E2A\u5947\u602A\u7684\u4E16\u754C\u6709\u4E00\u79CD\u719F\u6089\uFF0C\u4F46\u662F\u6211\u4EC0\u4E48\u90FD\u8BB0\u4E0D\u8D77\u6765\u4E86\u3002</p><p>\u7B97\u4E86\uFF0C\u5F97\u8FC7\u4E14\u8FC7\u5427\u3002</p><p>\u6211\u51C6\u5907\u53BB\u627E\u7A7A\u6307\u9488\u4E86\uFF0C\u867D\u7136\u542C\u8BF4\u4ED6\u5F88\u53EF\u6015\uFF0C\u4F46\u662F\u597D\u50CF\u542C\u8BF4\u4ED6\u4E0D\u662F\u55DC\u6740\u4E4B\u4EBA\uFF0C\u5E94\u8BE5\u4E0D\u4F1A\u6EE5\u6740\u65E0\u8F9C\u5427\uFF0C\u76EE\u524D\u4E3A\u6B62\uFF0C\u6211\u4E5F\u53EA\u5BF9\u8FD9\u4E09\u4E2A\u5B57\u6709\u719F\u6089\u7684\u611F\u89C9\u4E86\uFF0C\u6211\u4E00\u5B9A\u8981\u627E\u5230\u4ED6\uFF0C\u627E\u56DE\u6211\u7684\u8BB0\u5FC6\uFF01</p><p>\u6211\u6253\u542C\u4E86\u5F88\u4E45\uFF0C\u539F\u6765\u7A7A\u6307\u9488\u662F<strong>\u5F02\u5E38\u7EC4\u7EC7</strong>\u7684\u4E09\u4EE3\u5AE1\u4F20\uFF0C\u5F02\u5E38\u7EC4\u7EC7\u662F\u8FD9\u4E2A\u4E16\u754C\u4E0A\u6700\u6050\u6016\u7684\u6740\u624B\u7EC4\u7EC7\uFF0C\u7A7A\u6307\u9488\u5C31\u662F\u5F02\u5E38\u73B0\u5728\u6700\u51FA\u8272\u7684\u523A\u5BA2\u3002</p><p>\u542C\u8BF4\u7A7A\u6307\u9488\u51FA\u751F\u7684\u65F6\u5019\uFF0C\u8116\u5B50\u4E0A\u5C31\u6302\u7740\u4E00\u6839\u9488\uFF0C\u6574\u4E2A Java \u5927\u9646\u96EA\u4E0B\u4E00\u6708\u4E0D\u505C\uFF0CLinux \u68EE\u6797\u591A\u5757\u9646\u5730\u76F4\u63A5\u6C89\u9677\uFF0C\u4E8E\u662F\u4ED6\u7684\u7236\u4EB2\xA0<strong>RuntimeException</strong>\xA0\u5C31\u7ED9\u4ED6\u8D77\u4E86\u7A7A\u6307\u9488\u8FD9\u4E2A\u540D\u5B57\u3002</p><p>\u7A7A\u6307\u9488\u51FA\u751F\u7684\u5929\u751F\u5F02\u8C61\u4E5F\u5F15\u8D77\u4E86\u5F02\u5E38\u7EC4\u7EC7\u9AD8\u5C42\u7684\u6CE8\u610F\uFF0C\u542C\u8BF4\u4ED6\u7684\u7956\u7236\xA0<strong>Exception</strong>\uFF0C\u8FD8\u6709\u6574\u4E2A\u5F02\u5E38\u7EC4\u7EC7\u7684\u9886\u519B\u4EBA\u7269\xA0<strong>Throwable</strong>\xA0\u90FD\u4EB2\u81EA\u63A5\u89C1\u4E86\u7A7A\u6307\u9488\uFF0C\u5E76\u4E14\u8BA4\u4E3A\u7A7A\u6307\u9488\u5929\u8D4B\u5F02\u7980\uFF0C\u672A\u6765\u53EF\u671F\u3002</p><p>\u8981\u77E5\u9053\uFF0C<strong>Throwable</strong>\xA0\u53EF\u662F\xA0<strong>Object</strong>\xA0\u4EB2\u81EA\u4EFB\u547D\u7684\u5F02\u5E38\u7EC4\u7EC7\u5934\u9886\u3002\u4F5C\u4E3A Object \u6700\u503C\u5F97\u4FE1\u4EFB\u7684\u4EB2\u4FE1\uFF0C\u8DDF\u968F Object \u4E07\u5E74\u4EE5\u6765\uFF0C\u6240\u6709\u7684\u810F\u6D3B\u7D2F\u6D3B\u90FD\u4F9D\u9760 Thrwoable \u521B\u7ACB\u7684\u5F02\u5E38\u7EC4\u7EC7\u6765\u5904\u7406\uFF0C\u771F\u53EF\u8C13\u4E00\u4EBA\u4E4B\u4E0B\uFF0C\u4E07\u4EBA\u4E4B\u4E0A\u3002</p><p>Throwable \u53EA\u6709\u4E24\u4E2A\u4EB2\u5B50\uFF0C\u5C31\u662F Error \u548C Exception\uFF0C\u4F20\u8BF4\u4E2D Error \u5FC3\u72E0\u624B\u8FA3\uFF0C\u624B\u4E0B\u65E0\u4E00\u6D3B\u53E3\uFF0C\u89C1\u8FC7 Error \u7684\u4EBA\u8FD8\u80FD\u6D3B\u4E0B\u6765\u7684\u5BE5\u5BE5\u65E0\u51E0\u3002</p><p>\u6574\u4E2A\u5927\u9646\u53EA\u6709\u4ED6\u4EEC\u6050\u6016\u7684\u4F20\u8BF4\uFF0C\u8C01\u4E5F\u4E0D\u77E5\u9053\u4ED6\u4EEC\u4EC0\u4E48\u65F6\u5019\u51FA\u73B0\uFF0C\u4F46\u662F\u4E00\u65E6\u4ED6\u4EEC\u51FA\u73B0\uFF0C\u57FA\u672C\u5BA3\u544A\u7740\u4F60\u5DF2\u7ECF\u662F\u4E2A\u6B7B\u4EBA\u4E86\u3002</p><p>\u800C\u6211\u542C\u8BF4\u8FC7\u6700\u6050\u6016\u7684\u5C31\u662F<code>OutOfMemoryError</code>\xA0\u548C\xA0<code>StackOverflowError</code>\xA0\u8FD9\u4E24\u4F4D\u523A\u5BA2\uFF0C\u56E0\u4E3A\u5927\u9646\u4E0A\u6C38\u8FDC\u6709\u4E00\u5EA7\u98CE\u4E91\u699C\u60AC\u6302\u5728\u5E1D\u90FD\u95E8\u53E3\uFF0C\u800C\u8FD9\u4E24\u4F4D\uFF0C\u4E00\u76F4\u4F4D\u5C45\u6740\u624B\u699C\u699C\u9996\u4F4D\u7F6E\uFF0C\u7A7A\u6307\u9488\u4E5F\u53EA\u53EA\u80FD\u5C48\u5C45\u7B2C\u4E09\u800C\u5DF2\u3002\u5F53\u7136\uFF0C\u5927\u9646\u4E0D\u5C11\u4EBA\u90FD\u8BA4\u4E3A\u7A7A\u6307\u9488\u4F1A\u540E\u6765\u5C45\u4E0A\u3002</p><p>\u6211\u7684\u6D88\u606F\u53EA\u662F\u6253\u542C\u5230\u8FD9\u4E48\u591A\uFF0C\u63A5\u4E0B\u6765\u7684\u65E5\u5B50\uFF0C\u6211\u8D70\u8FC7\u65E0\u6570\u7684\u57CE\u5E02\u3001\u8352\u91CE\uFF0C\u6211\u7A7F\u8FC7\u6C99\u6F20\u3001\u4E1B\u6797\uFF0C\u8FD9\u4E00\u5929\uFF0C\u7EC8\u4E8E\uFF0C\u6211\u6765\u5230\u4E86\u5927\u9646\u7684\u5E1D\u90FD--<strong>\u5806</strong>\u3002</p><p>\u8FD9\u4E2A\u540D\u5B57\u542C\u8D77\u6765\u4E5F\u6709\u70B9\u8033\u719F\uFF0C\u4E0D\u7BA1\u4ED6\uFF0C\u5148\u8FDB\u57CE\u518D\u8BF4\u3002</p><p>\u8FDB\u57CE\u540E\u6211\u53D1\u73B0\u8FD9\u91CC\u975E\u5E38\u8BE1\u5F02\uFF0C\u6574\u5EA7\u57CE\u5E02\u597D\u50CF\u90FD\u975E\u5E38\u5E74\u8F7B\uFF0C\u597D\u50CF\u8FDE\u4E00\u4E2A\u6210\u5E74\u4EBA\u90FD\u6CA1\u6709\uFF01\u8857\u9053\u4E0A\u7199\u7199\u6518\u6518\u7ADF\u7136\u90FD\u662F\u5E74\u8F7B\u4EBA\u3002</p><p>\u5E26\u7740\u7591\u60D1\uFF0C\u6211\u8D70\u8FDB\u4E86\u4E00\u5BB6\u53EB\u505A<em>\u540C\u798F\u5BA2\u6808</em>\u7684\u9152\u697C\u3002</p><p>\u201D\u5BA2\u5B98\uFF0C\u6253\u5C16\u8FD8\u662F\u4F4F\u5E97\u554A\uFF1F\u201C\u4E00\u4E2A\u5C0F\u4E8C\u6A21\u6837\u7684<em>\u5C0F\u5B69</em>\u5E26\u7740\u4E00\u4E1D\u8C04\u5A9A\u7684\u5BF9\u6211\u8BF4\u3002</p><p>\u201D\u4F4F\u5E97\uFF0C\u5E26\u6211\u53BB\u6700\u597D\u7684\u623F\u95F4\uFF0C\u8FD9\u4E9B\u94B1\u5148\u62BC\u4F60\u8FD9\u91CC\uFF0C\u4E0D\u591F\u518D\u8DDF\u6211\u8981\u3002\u201C\u4E00\u8DEF\u8D70\u6765\uFF0C\u5BF9\u4E8E\u8FD9\u4E9B\u5730\u65B9\u7684\u884C\u60C5\u6211\u4E5F\u7B97\u8F7B\u8F66\u719F\u8DEF\u4E86\u3002</p><p>\u201D\u5C0F\u670B\u53CB\uFF0C\u8FD9\u91CC\u662F\u600E\u4E48\u56DE\u4E8B\uFF1F\u4F60\u4EEC\u8FD9\u91CC\u6CA1\u6709\u5927\u4EBA\u5417\uFF1F\u201C\u6211\u4E00\u8FB9\u8D70\u4E00\u8FB9\u95EE\u8FD9\u4E2A\u53EA\u6709\u6211\u4E00\u534A\u8EAB\u9AD8\u7684\u5C0F\u5B69\uFF0C\u6839\u636E\u6211\u76EE\u6D4B\uFF0C\u4ED6\u8EAB\u9AD8\u4E0D\u8D85\u8FC71\u7C73\uFF0C\u5E94\u8BE5\u8FD8\u53EA\u6709\u4E03\u516B\u5C81\u7684\u6837\u5B50\uFF0C\u96BE\u9053\u8FD9\u91CC\u7684\u5546\u4EBA\u5982\u6B64\u9ED1\u5FC3\uFF0C\u7ADF\u7136\u96C7\u4F63\u7AE5\u5DE5\uFF0C\u4E0D\u8FC7\u8FD9\u4E5F\u4E0D\u8C8C\u4F3C\u4E0D\u5BF9\uFF0C\u56E0\u4E3A\u5468\u56F4\u7684\u5BA2\u4EBA\u597D\u50CF\u4E5F\u90FD\u662F\u8FD9\u822C\u5E74\u7EAA\uFF0C\u4ED6\u4EEC\u7ADF\u7136\u8FD8\u6709\u5728\u62BD\u70DF\u559D\u9152\u7684\uFF01</p><p>\u201D\u5BA2\u5B98\u53EF\u771F\u5E7D\u9ED8\uFF0C\u4E0D\u8FC7\u6211\u770B\u5BA2\u5B98\u5E94\u8BE5\u662F\u521A\u6765\u5E1D\u90FD\uFF0C\u4E0D\u7792\u60A8\u8BF4\uFF0C\u6574\u4E2A\u5E1D\u90FD\u5C31\u57FA\u672C\u6CA1\u6709\u8D85\u8FC715\u5C81\u7684\u4EBA\uFF0C\u8D85\u8FC715\u7684\u636E\u8BF4\u90FD\u5728\u53EB\u505A\u8001\u5E74\u533A\u7684\u517B\u8001\u53BB\u4E86\uFF01\u5C31\u62FF\u6211\u6765\u8BF4\u5427\uFF0C\u6211\u4ECA\u5E74\u53EF\u4E0D\u5C0F\u4E86\uFF0C\u6211\u90FD8\u5C81\u4E86\uFF0C\u50CF\u6211\u8FD9\u822C\u5E74\u7EAA\u7684\u5DF2\u7ECF\u534A\u622A\u817F\u8FC8\u8FDB\u68FA\u6750\u54AF\u3002\u54CE\uFF0C\u8FD9\u8EAB\u5B50\u4E5F\u662F\u4E00\u5E74\u4E0D\u5982\u4E00\u5E74\u4E86\u3002\u201C</p><p>\u770B\u7740\u8FD9\u4E2A\u5C0F\u4E8C\u4E00\u8138\u8BA4\u771F\u7684\u6837\u5B50\uFF0C\u6211\u8D8A\u53D1\u89C9\u5F97\u8FD9\u5EA7\u57CE\u5E02\u8BE1\u5F02\u8D77\u6765\u4E86\uFF018\u5C81\uFF0C\u4EC0\u4E48\u9B3C\uFF1F8\u5C81\u4E0D\u662F\u5E94\u8BE5\u5728\u5BB6\u91CC\u770B\u559C\u7F8A\u7F8A\u5417\uFF1F\uFF01\u8FD8\u534A\u622A\u817F\u8FC8\u8FDB\u68FA\u6750\uFF01</p><p>\u201D\u53EF\u662F\u4F60\u770B\u6211\u6BD4\u4F60\u9AD8\u8FD9\u4E48\u591A\uFF0C\u4F60\u4E0D\u89C9\u5F97\u5947\u602A\u5417\uFF1F\u201C\u6211\u5947\u602A\u7684\u95EE\u4ED6\u3002</p><p>\u201D\u6709\u4EC0\u4E48\u597D\u5947\u602A\u7684\uFF0C\u8981\u4E0D\u662F\u6211\u5C0F\u65F6\u5019\u559D\u591A\u4E86\u4E09\u9E7F\uFF0C\u6CA1\u51C6\u6211\u4E5F\u957F\u8FD9\u4E48\u9AD8\u4E86\uFF01\u201C\u5C0F\u4E8C\u6709\u70B9\u751F\u6C14\u7684\u5BF9\u6211\u8BF4\u3002</p><p>\u884C\u5427\uFF0C\u518D\u8BF4\u4E24\u53E5\u628A\u4ED6\u6FC0\u6012\u4E86\uFF0C\u8DF3\u8D77\u6765\u6253\u6211\u819D\u76D6\u5C31\u5927\u4E8B\u4E0D\u5999\u4E86\u3002</p><p>\u63A5\u4E0B\u6765\u7684\u51E0\u5929\uFF0C\u7ECF\u8FC7\u6211\u7684\u6253\u63A2\uFF0C\u539F\u6765\u6211\u5728\u7684\u5730\u65B9\u662F\u53EB\u505A\u5E74\u8F7B\u533A\uFF0C\u6574\u4E2A\u5E1D\u90FD\u5C31\u53EA\u6709\u8FD9\u4E24\u4E2A\u533A\u57DF\uFF0C\u5E74\u8F7B\u533A\u7684\u4EBA\u5E74\u9F84\u786E\u5B9E\u6CA1\u6709\u8D85\u8FC715\u5C81\u7684\uFF0C\u6709\u4E9B\u4EBA\u521A\u51FA\u751F\u6CA1\u51E0\u5929\u5C31\u6B7B\u4E86\uFF0C\u5BF9\u6B64\uFF0C\u751F\u6D3B\u5728\u8FD9\u91CC\u7684\u4EBA\u4E5F\u89C1\u602A\u4E0D\u602A\u4E86\u3002\u5BF9\u4E8E\u4ED6\u4EEC\u6765\u8BF4\uFF0C\u5BC4\u5E0C\u671B\u80FD\u6D3B\u5230\u8D85\u8FC715\u5C81\u8FDB\u5165\u8001\u5E74\u533A\u517B\u8001\u5C31\u662F\u4ED6\u4EEC\u7684\u68A6\u60F3\u3002</p><p>\u6211\u5728\u6000\u7591\u662F\u4E0D\u662F\u5F02\u5E38\u7EC4\u7EC7\u5728\u8FD9\u91CC\u6697\u6740\uFF0C\u53EF\u662F\u53D1\u73B0\u7ED3\u679C\u5E76\u4E0D\u662F\uFF0C\u8FD9\u91CC\u7684\u4EBA\u8C8C\u4F3C\u5DF2\u7ECF\u4E60\u60EF\u4E86\uFF0C\u751F\u6D3B\u5BF9\u4ED6\u4EEC\u6765\u8BF4\u5C31\u662F\u968F\u4FBF\u6D3B\u6D3B\u5C31\u597D\u4E86\uFF0C\u6BCF\u6B21\u7684\u6B7B\u4EA1\u5BF9\u4E8E\u4ED6\u4EEC\u6765\u8BF4\u6BEB\u65E0\u5F81\u5146\uFF0C\u53EF\u80FD\u521A\u8E22\u7740\u7403\u5462\uFF0C\u5C31\u7A81\u7136\u6302\u4E86\uFF0C\u6709\u7684\u4E0A\u7740\u5395\u6240\u7A81\u7136\u5C31\u6B7B\u4E86\uFF0C\u4E34\u6B7B\u524D\u8FDE\u4E2A\u5C41\u80A1\u90FD\u6CA1\u64E6\uFF0C\u4E0D\u8BF4\u4E86\uFF0C\u6709\u70B9\u6076\u5FC3\u3002</p><p>\u5C31\u5728\u6211\u7B49\u7684\u4E0D\u8010\u70E6\u60F3\u6253\u7B97\u53BB\u8001\u5E74\u533A\u770B\u770B\u7684\u65F6\u5019\uFF0C\u4E00\u4E2A\u7A7F\u7740\u9ED1\u8863\u7684\u4EBA\u627E\u5230\u4E86\u6211\u3002</p><p>\u201D\u4F60\u662F\u8C01\uFF1F\u201C\u6211\u8B66\u60D5\u7684\u95EE\u4ED6\u3002</p><p>\u201D\u672C\u5EA7IOException\u3002\u201C\u9ED1\u8863\u4EBA\u795E\u60C5\u51B0\u51B7\u7684\u770B\u7740\u6211\u8BF4\u3002</p><p>\u201D\u4F60\u627E\u6211\u4EC0\u4E48\u4E8B\uFF1F\u201C</p><p>\u201D\u8FD9\u4E9B\u4F60\u4E0D\u7528\u77E5\u9053\uFF0C\u8DDF\u6211\u8D70\u4E00\u8D9F\u5427\uFF01\u201C</p><p>\u6211\u521A\u60F3\u8BF4\u8BDD\u62D2\u7EDD\uFF0C\u5F00\u4EC0\u4E48\u73A9\u7B11\uFF0C\u8DDF\u4F60\u4EEC\u5F02\u5E38\u7EC4\u6253\u4EA4\u9053\u7684\u4EBA\u975E\u6B7B\u5373\u6B8B\uFF0C\u8C01\u8981\u8DDF\u4F60\u53BB\u3002</p><p>\u4F46\u662F\u7531\u4E0D\u5F97\u6211\u62D2\u7EDD\uFF0C\u6211\u53EA\u611F\u89C9\u4E00\u9635\u5929\u65CB\u5730\u8F6C\uFF0C\u6211\u611F\u89C9\u6211\u5728\u5929\u4E0A\u98DE\uFF0C\u7136\u540E\u6211\u5C31\u5931\u53BB\u4E86\u610F\u8BC6\u3002\u5F53\u6211\u9192\u6765\u7684\u65F6\u5019\uFF0C\u6211\u53D1\u73B0\u6211\u8EBA\u5728\u4E00\u5F20\u5DE8\u5927\u7684\u5E8A\u4E0A\uFF0C\u684C\u5B50\u4E0A\u70B9\u7740\u4E00\u652F\u6A80\u9999\uFF0C\u6574\u4E2A\u623F\u95F4\u53EA\u6709\u4E00\u5F20\u684C\u5B50\u3001\u4E00\u628A\u6905\u5B50\u548C\u6211\u8EBA\u7684\u5730\u65B9\u3002</p><p>\u623F\u95F4\u5F88\u5C0F\uFF0C\u5E94\u8BE5\u53EA\u670910\u51E0\u4E2A\u5E73\u65B9\uFF0C\u4F46\u662F\u6211\u7ADF\u7136\u53C8\u6709\u4E00\u79CD\u719F\u6089\u7684\u611F\u89C9\uFF0C\u8FD9\u79CD\u611F\u89C9\u8426\u7ED5\u5728\u6211\u5FC3\u5934\u6325\u6563\u4E0D\u53BB\u3002</p><p>\u6CA1\u7B49\u6211\u518D\u60F3\u66F4\u591A\uFF0C\u623F\u95E8\u6253\u5F00\u4E86\u3002</p><p>\u201D\u662F\u4F60\uFF0C\u4F60\u628A\u6211\u5E26\u6765\u5E72\u4EC0\u4E48\uFF1F\u201C</p><p>\u201D\u8D70\u5427\uFF0C\u6709\u4EBA\u8981\u89C1\u4F60\u3002\u201C</p><p>\u8FD8\u662F\u4E0D\u5BB9\u6211\u6297\u62D2\uFF0C\u5982\u679C\u6211\u7684\u6218\u6597\u529B\u662F5\u7684\u8BDD\uFF0C\u6211\u60F3\uFF0CIO\u4ED6\u8BE5\u6709\u597D\u51E0\u4E07\u4E86\u5427\u3002</p><p>\u53C8\u662F\u8FD9\u8BE5\u6B7B\u7684\u7729\u6655\u611F\uFF0C\u4E0D\u8FC7\u8FD9\u6B21\u6CA1\u6709\u51E0\u79D2\u949F\uFF0C\u6211\u5C31\u53D1\u73B0\u6211\u5728\u4E00\u4E2A\u82B1\u56ED\u91CC\uFF0C\u82B1\u56ED\u4E2D\u95F4\u4E00\u4E2A\u8EAB\u7A7F\u9EC4\u888D\u7684\u4E2D\u5E74\u4EBA\u6B63\u5728\u6162\u60A0\u60A0\u7684\u559D\u8336\u3002\u5728\u4ED6\u8EAB\u4E0A\u6211\u611F\u53D7\u4E0D\u5230\u4EFB\u4F55\u5F3A\u5927\u7684\u6C14\u606F\uFF0C\u751A\u81F3\u4E0D\u5982IOException\u7ED9\u6211\u7684\u538B\u8FEB\u611F\u5F3A\u70C8\u3002\u8FD9\u662F\u8C01\uFF1F</p><p>\u4E0D\u7B49\u6211\u601D\u7EEA\u98D8\u98DE\uFF0CIOException\u5F2F\u8170\u8EAC\u8EAB\u8BF4\u9053\uFF1A\u201D\u965B\u4E0B\uFF0C\u4EBA\u5E26\u8FC7\u6765\u4E86\u3002\u201C</p><p>\u201D\u55EF\uFF0C\u4F60\u9000\u4E0B\u5427\u3002\u201C\u4E2D\u5E74\u4EBA\u8F6C\u8FC7\u8EAB\u6765\uFF0C\u8138\u4E0A\u4E1D\u6BEB\u770B\u4E0D\u51FA\u60C5\u7EEA\u7684\u8BF4\u9053\u3002</p><p>\u6211\u5927\u6982\u731C\u5230\u4E86\u8FD9\u662F\u54EA\u91CC\u4E86\uFF0C\u4E8E\u662F\u4E5F\u653E\u4E0B\u5FC3\u6765\uFF0C\u5728\u8FD9\u91CC\uFF0C\u6216\u8BB8\u80FD\u627E\u5230\u6211\u7684\u7B54\u6848\u3002</p><p>\u53CD\u6B63\u4ED6\u8981\u5BF9\u6211\u600E\u4E48\u6837\uFF0C\u6211\u4E5F\u6CA1\u6709\u529E\u6CD5\u53CD\u6297\uFF0C\u6211\u5F84\u76F4\u5750\u5230\u4ED6\u7684\u5BF9\u9762\uFF0C\u770B\u7740\u4ED6\u8BF4\uFF1A\u201D\u60A8\u5C31\u662FObject\u965B\u4E0B\u5427\uFF0C\u4E0D\u77E5\u627E\u6211\u6240\u8C13\u4F55\u4E8B\uFF1F\u201C</p><p>\u4E2D\u5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...\u8FD9\u4E2A\u6C14\u6C1B\u8BA9\u6211\u611F\u89C9\u5F88\u4E0D\u8212\u670D\u3002\u5C31\u5728\u6211\u53D7\u4E0D\u4E86\u60F3\u8BF4\u8BDD\u7684\u65F6\u5019\uFF0CObject\u7A81\u7136\u8BF4\u4E86\u4E00\u53E5\uFF1A\u201C\u5E26\u4ED6\u53BB\u89C1\u7A7A\u6307\u9488\u5427\u3002\u201D</p><p>\u201C\u662F\uFF0C\u965B\u4E0B\uFF01\u201D\u7A81\u7136\uFF0C\u4E00\u4E2A\u8EAB\u7A7F\u7EA2\u888D\u7684\u67AF\u7626\u8001\u8005\u51FA\u73B0\u5728\u6211\u80CC\u540E\uFF0C\u628A\u6211\u5413\u4E86\u4E00\u8DF3\u3002</p><p>\u6211\u4E5F\u4E0D\u60F3\u518D\u591A\u751F\u4E8B\u7AEF\uFF0C\u76F4\u89C9\u544A\u8BC9\u6211\u8FD9\u91CC\u4E0D\u662F\u4E45\u7559\u4E4B\u5730\uFF0C\u867D\u7136\u6709\u70B9\u83AB\u540D\u5176\u5999\uFF0C\u6211\u8FD8\u662F\u8DDF\u7740\u7EA2\u888D\u8001\u8005\u6765\u8D70\u4E86\u3002</p><p>... ...</p><p>\u201C\u965B\u4E0B\uFF0C\u662F\u4ED6\u5417\uFF1F\u201D\u4E00\u4E2A\u5149\u5934\u5927\u6C49\u7684\u8EAB\u5F71\u5728\u534A\u7A7A\u82E5\u5F71\u82E5\u73B0\u7684\u8BF4\u9053\u3002</p><p>\u201C\u8FD8\u4E0D\u80FD\u786E\u5B9A... \u4E0D\u8FC7\uFF0C\u7559\u7ED9\u6211\u4EEC\u7684\u65F6\u95F4\u4E0D\u591A\u4E86\uFF0C\u4E0B\u4E00\u6B21\u7684\u8F6E\u56DE\u5C31\u5FEB\u6765\u4E86\u3002\u201D</p><p>\u201C\u8F6E\u56DE\uFF0C\u53C8\u662F\u8F6E\u56DE\u3002\u6211\u4EEC\u8FD8\u6709\u5E0C\u671B\u5417\uFF1F\u201D\u5927\u6C49\u5462\u5583\u7740\uFF0C\u4E0D\u77E5\u9053\u662F\u5BF9\u81EA\u5DF1\u8BF4\u8FD8\u662F\u5BF9\u4E2D\u5E74\u4EBA\u8BF4\u3002</p><p>\u4E2D\u5E74\u4EBA\u4F9D\u7136\u80CC\u7740\u624B\uFF0C\u62AC\u5934\u671B\u7740\u6F2B\u5929\u7684\u67F3\u7D6E\u8BF4\u9053\uFF1A\u201C\u8FD9\u4E00\u4E16\uFF0C\u8BE5\u662F\u4E2A\u4E86\u65AD\u4E86\u3002\u201D</p><p>... ...</p><p>\u6CA1\u591A\u4E45\uFF0C\u4ED6\u628A\u6211\u5E26\u5230\u4E00\u4E2A\u623F\u95F4\u95E8\u53E3\uFF0C\u4E5F\u662F\u9762\u65E0\u8868\u60C5\u7684\u8BF4\u9053\uFF1A\u201C\u8FDB\u53BB\u5427\uFF0C\u7A7A\u6307\u9488\u5C31\u5728\u91CC\u9762\u3002\u201D</p><p>\u6211\u633A\u4F4F\u811A\u6B65\uFF0C\u8F6C\u8FC7\u8EAB\u95EE\u4ED6\uFF1A\u201C\u4F60\u662F\u8C01\uFF1F\u6211\u4EEC\u662F\u4E0D\u662F\u89C1\u8FC7\uFF1F\u201D</p><p>\u7EA2\u888D\u8001\u8005\u602A\u5F02\u4E00\u7B11\uFF1A\u201C\u4E5F\u8BB8\u5427\uFF0C\u8001\u592B<code>IndexOutOfBoundsException</code>\uFF0C\u7A7A\u6307\u9488\u4FBF\u662F\u6211\u597D\u53CB\u3002\u201D</p><p>\u8FD9\u4E2A\u540D\u5B57\u53EF\u771F\u957F\uFF0C\u6211\u542C\u8BF4\u8FC7\u4ED6\uFF0C\u636E\u4F20\u95FB\u4ED6\u7684\u5B9E\u529B\u4E5F\u975E\u5E38\u4E4B\u5F3A\uFF0C\u53EF\u80FD\u4E0D\u4E0B\u4E8E\u7A7A\u6307\u9488\uFF0C\u90FD\u662F\u4EE5\u8BE1\u5F02\u7684\u51FA\u624B\u89D2\u5EA6\u8457\u79F0\uFF0C\u4E0D\u8FC7\u76F8\u6BD4\u4E8E\u7A7A\u6307\u9488\u7684\u5927\u540D\uFF0C\u4ED6\u597D\u50CF\u66F4\u4F4E\u8C03\uFF0C\u96BE\u602A\u5728\u7687\u5BAB\u5F53\u4E2A\u8001\u592A\u76D1\u4E00\u822C\u3002</p><p>\u6211\u4E5F\u4E0D\u5728\u591A\u60F3\uFF0C\u70B9\u70B9\u5934\uFF0C\u8D70\u8FDB\u4E86\u623F\u95F4\u3002\u521A\u8FDB\u623F\u95F4\uFF0C\u6211\u5C31\u770B\u89C1\u4E00\u4E2A\u4E00\u8EAB\u767D\u8863\u7684\u8EAB\u5F71\u80CC\u5BF9\u7740\u6211\uFF0C\u7B14\u76F4\u7684\u8EAB\u5F71\u597D\u50CF\u8981\u51B2\u7834\u5929\u9645\uFF0C\u8EAB\u4E0A\u7684\u6C14\u52BF\u5F3A\u5927\u65E0\u6BD4\uFF0C\u81F3\u5C11\u5728\u6211\u89C1\u8FC7\u7684\u6240\u6709\u4EBA\u91CC\u8DB3\u4EE5\u6392\u8FDB\u524D\u4E09\u4E86\u3002\u7A7A\u6307\u9488\uFF0C\u679C\u7136\u540D\u4E0D\u865A\u4F20\uFF01</p><p>\u6211\u8D70\u5230\u623F\u95F4\u4E2D\u592E\uFF0C\u73AF\u76EE\u56DB\u671B\u624D\u53D1\u73B0\u8FD9\u597D\u50CF\u662F\u4E00\u5EA7\u7960\u5802\u7684\u6837\u5B50\uFF0C\u5C31\u5728\u6211\u8FD8\u5728\u6253\u91CF\u56DB\u5468\u4E4B\u9645\uFF0C\u4E00\u9053\u6E05\u51B7\u7684\u58F0\u97F3\u4F20\u5230\u6211\u7684\u8033\u8FB9\uFF1A</p><p>\u201C\u4F60\u8EAB\u4E0A\u7684\u6C14\u606F\u8BA9\u6211\u975E\u5E38\u8BA8\u538C\uFF01\u201D</p><p>\u4ED6\u8F6C\u8FC7\u8EAB\u6765\uFF0C\u6211\u53D1\u73B0\u6211\u6839\u672C\u770B\u4E0D\u6E05\u7A7A\u6307\u9488\u957F\u4EC0\u4E48\u6837\u5B50\uFF0C\u4ED6\u7684\u8138\u597D\u50CF\u6253\u4E0A\u4E86\u9A6C\u8D5B\u514B\u3002\u542C\u5230\u4ED6\u7684\u8BDD\uFF0C\u6211\u5FC3\u91CC\u7684\u7591\u60D1\u66F4\u591A\u4E86\uFF0C\u6211\u53EA\u662F\u89C9\u5F97\u4ED6\u7684\u6C14\u606F\u8BA9\u6211\u611F\u5230\u975E\u5E38\u719F\u6089\uFF0C\u4ED6\u7684\u8BDD\u8BA9\u6211\u6709\u70B9\u83AB\u540D\u5176\u5999\u3002\u4E8E\u662F\u6211\u8BD5\u63A2\u9053\uFF1A</p><p>\u201C\u4F60\u77E5\u9053\u6211\u662F\u8C01\uFF1F\u201D</p><p>\u542C\u5230\u6211\u7684\u8BDD\uFF0C\u4ED6\u4E00\u6B65\u6B65\u8D70\u8FDB\u6211\uFF0C\u5728\u6211\u8EAB\u8FB9\u95FB\u4E86\u95FB\uFF0C\u8FD9\u8BA9\u6211\u4EC0\u4E48\u4E00\u7D27\uFF0C\u867D\u7136\u6211\u60F3\u641E\u6E05\u695A\u6211\u8EAB\u4E0A\u7684\u95EE\u9898\uFF0C\u4F46\u662F\u6211\u4E0D\u662F\u51FA\u5356\u8089\u4F53\u7684\u4EBA\uFF0C\u6211\u9000\u540E\u4E00\u6B65\u8BF4\uFF1A</p><p>\u201C\u4F60\u60F3\u5E72\u561B\uFF1F\u201D</p><p>\u7A7A\u6307\u9488\u76B1\u7D27\u4E86\u7709\u5934\uFF0C\u4EFF\u4F5B\u81EA\u8A00\u81EA\u8BED\u9053\uFF1A\u201C\u4E0D\u5BF9\uFF0C\u4E0D\u5BF9\uFF0C\u8FD9\u662F... \u89C4\u5219\u7684\u6C14\u606F\uFF1F\u53EF\u662F\u4ED6\u660E\u660E\u8EAB\u4E0A\u6CA1\u6709\u4EFB\u4F55\u80FD\u91CF\u6CE2\u52A8\u3002\u201D</p><p>\u6211\u89C1\u4ED6\u597D\u50CF\u9B54\u6014\u4E86\uFF0C\u4EFF\u4F5B\u5728\u601D\u8003\u4EC0\u4E48\uFF0C\u4E8E\u662F\u8FC8\u6B65\u8D70\u5230\u4ED6\u521A\u624D\u7AD9\u7ACB\u7684\u5730\u65B9\u770B\u7740\u524D\u9762\uFF0C\u539F\u6765\uFF0C\u8FD9\u662F\u4ED6\u4EEC\u7684\u65CF\u8C31\uFF01\u8FD9\u91CC\u662F\u5F02\u5E38\u7684\u7960\u5802\uFF01</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/exception/npe-1.jpg" alt=""></p><p>\u770B\u5B8C\u8FD9\u5F20\u65CF\u8C31\uFF0C\u6211\u604D\u7136\u5927\u609F\uFF0C\u597D\u50CF\u660E\u767D\u4E86\u4EC0\u4E48\u3002\u7A81\u7136\uFF0C\u6211\u7684\u8111\u888B\u91CC\u51FA\u73B0\u4E86\u4E00\u4E2A\u51B0\u51B7\u7684\u673A\u5668\u58F0\u97F3\uFF1A\u201C\u83B7\u53D6\u5F02\u5E38\u65CF\u8C31\uFF0C\u5386\u7EC3\u5B8C\u6210\u5EA6+100\u3002\u201D</p><p>\u6211Kao\uFF0C\u7CFB\u7EDF\uFF0C\u8FD9\u662F\u7CFB\u7EDF\u554A\uFF0C\u6211\u4E0D\u7981\u5185\u725B\u6EE1\u9762\uFF0C\u5565\u4EFB\u52A1\u7CFB\u7EDF\u554A\uFF0C\u4E00\u70B9\u63D0\u793A\u90FD\u6CA1\u6709\uFF0C\u6211\u8D76\u7D27\u558A\u9053\uFF1A</p><p>\u201C\u7CFB\u7EDF\uFF0C\u7CFB\u7EDF\uFF0C\u8FD8\u5728\u5417\uFF1F\u5728\u7EBF\u7B49\uFF0C\u633A\u7740\u6025\u7684\u3002\u201D\u53EF\u662F\u6CA1\u6709\u4EFB\u4F55\u56DE\u590D\uFF01\u8FD9\u5565\u7834\u7CFB\u7EDF\uFF01\u5C31\u5728\u6211\u60F3\u7834\u53E3\u5927\u9A82\u7684\u65F6\u5019\uFF0C\u7A7A\u6307\u9488\u770B\u5230\u6211\u548C\u4E2A\u4E8C\u50BB\u5B50\u4F3C\u7684\u5927\u547C\u5C0F\u53EB\uFF0C\u7A81\u7136\u4E00\u8138\u4E0D\u53EF\u601D\u8BAE\u7684\u5BF9\u7740\u6211\u8BF4\uFF1A</p><p>\u201C\u4F60\u660E\u609F\u4E86\u89C4\u5219\uFF1F\u201D</p><p>\u6211\u6123\u4E86\u6123\uFF0C\u55EF\uFF1F\u96BE\u9053\u6211\u4E0D\u662F\u62185\u6E23\u4E86\uFF1F\u89C4\u5219\u4E4B\u529B\uFF1F\u597D\u50CF\u662F\u5F88\u9AD8\u7AEF\u7684\u6837\u5B50\u554A\uFF1F</p><p>\u201C\u6492\u8C46\u6210\u5175\uFF01\u201D</p><p>\u201C\u547C\u98CE\uFF01\u201D</p><p>\u201D\u5524\u96E8\uFF01\u201C</p><p>\u201D\u4E34\u5175\u6597\u8005\u7686\u9635\u5217\u5728\u524D\uFF01\u201C</p><p>\u4E00\u70B9\u53CD\u5E94\u90FD\u6CA1\u6709\u3002\u3002\u3002\u5565\u73A9\u610F\u513F\uFF1F\u8FD8\u89C4\u5219\u4E4B\u529B\uFF1F\u4E5D\u5B57\u771F\u8A00\u90FD\u6CA1\u7528\u554A\uFF1F</p><p>\u7A7A\u6307\u9488\u597D\u50CF\u90FD\u8499\u4E86\uFF0C\u4ED6\u6572\u4E86\u6572\u592A\u9633\u7A74\uFF0C\u65E0\u8BED\u7684\u770B\u7740\u6211\u8BF4\uFF1A</p><p>\u201D\u4F60\u4E0D\u662F\u6765\u627E\u6211\u7684\u5417\uFF1F\u8BF4\u5B8C\u4F60\u7684\u95EE\u9898\uFF0C\u7136\u540E\u7ED9\u6211\u6EDA\uFF01\u201C</p><p>\u5BF9\u554A\uFF0C\u8FD9\u7CFB\u7EDF\u628A\u6211\u6574\u7684\u6211\u90FD\u5FD8\u8BB0\u6211\u6765\u5E72\u561B\u7684\u4E86\uFF0C\u6211\u8D76\u7D27\u8BF4\uFF1A</p><p>\u201D\u4F60\u8BA4\u8BC6\u6211\u5BF9\u4E0D\u5BF9\uFF0C\u4F60\u662F\u4E0D\u662F\u89C9\u5F97\u6211\u6709\u4E00\u79CD\u719F\u6089\u7684\u611F\u89C9\uFF1F\u6211\u60F3\u77E5\u9053\u6211\u7684\u6765\u5386\uFF01\u201C</p><p>\u7A7A\u6307\u9488\u53C8\u6123\u4E86\u6123\uFF0C\u4ED6\u770B\u7740\u6211\uFF0C\u6C89\u9ED8\u4E86\u4E00\u4F1A\u513F\uFF0C\u56DE\u9053\uFF1A\u201C\u4E0D\u77E5\u9053\uFF01\u201D</p><p>\u6211\u6709\u70B9\u5947\u602A\uFF0C\u770B\u4ED6\u4E00\u8138\u4FBF\u79D8\u7684\u8868\u60C5\u5E94\u8BE5\u662F\u89C1\u8FC7\u6211\u7684\uFF0C\u4ED6\u4E00\u5B9A\u5728\u6492\u8C0E\uFF0C\u65E2\u7136\u5982\u6B64...</p><p>\u201C\u90A3\u4F60\u544A\u8BC9\u6211\u4F60\u4EEC\u6709\u4EC0\u4E48\u529E\u6CD5\u80FD\u5728\u4F60\u4EEC\u5F02\u5E38\u7684\u653B\u51FB\u4E0B\u9632\u8EAB\u5427\uFF1F\u201D</p><p>\u7A7A\u6307\u9488\u5927\u6012\uFF0C\u521A\u60F3\u8D77\u8EAB\u8BF4\u8BDD\uFF0C\u7A7A\u4E2D\u7A81\u7136\u4F20\u6765\u4E00\u9053\u58F0\u97F3\uFF1A\u7B54\u5E94\u4ED6\u7684\u8981\u6C42\uFF01</p><p>\u4ED6\u51B7\u54FC\u4E00\u58F0\uFF0C\u4E22\u7ED9\u6211\u4E00\u672C\u4E66\uFF0C\u4E0A\u9762\u5199\u7740<strong>catch</strong>\u4E00\u4E2A\u5B57\uFF0C\u8FD8\u6709\u4E00\u5757\u5199\u7740<strong>catch</strong>\u7684\u4EE4\u724C\uFF0C\u51B0\u51B7\u7684\u8BF4\u5230\uFF1A\u201C\u4F60\u60F3\u77E5\u9053\u7684\u90FD\u5728\u8FD9\u91CC\u4E86\u3002\u201D\u8BF4\u5B8C\uFF0C\u62C2\u8896\u800C\u53BB\u3002</p><p>\u6211\u770B\u7740\u684C\u5B50\u4E0A\u7684\u8FD9\u672C\u4E66\uFF0C\u60F3\u4E86\u60F3\u8FD8\u662F\u7FFB\u9605\u8D77\u6765\u3002</p><p>\u539F\u6765<code>Exception</code>\xA0\u548C\u5B83\u7684\u513F\u5B50\u4EEC\uFF0C\u9664\u4E86<code>RuntimeException</code>\xA0\u4E00\u652F\uFF0C\u90FD\u53EB\u4F5C<code>Checked Exception</code>\uFF0C\u6211\u8FD8\u80FD\u7528catch\u4EE4\u724C\u6765\u5BF9\u6297\u4ED6\u4EEC\u7684\u653B\u51FB\uFF01\u5305\u62EC\u7A7A\u6307\u9488\uFF0C\u4EE5\u540E\u6211\u5C31\u4E0D\u6015\u4ED6\u4EEC\u4E86\uFF01</p><p>\u53EF\u662F\uFF0C\u4ED6\u4E3A\u4EC0\u4E48\u8981\u7ED9\u6211\uFF0C\u770B\u4ED6\u521A\u624D\u7684\u6837\u5B50\u90FD\u60F3\u6253\u6211\u4E86\uFF0C\u53C8\u7A81\u7136\u7ED9\u4E86\u6211\u8FD9\u4E9B\uFF1F\u8FD8\u6709\u4ED6\u4E00\u76F4\u5728\u8BF4\u7684\u89C4\u5219\u4E4B\u529B\u53C8\u662F\u4EC0\u4E48\uFF1F\u8FD9\u5EA7\u57CE\u5E02\u4E3A\u4EC0\u4E48\u53C8\u8FD9\u4E48\u8BE1\u5F02\uFF1F</p><blockquote><p>\u8F6C\u8F7D\u94FE\u63A5\uFF1Ahttps://mp.weixin.qq.com/s/PDfd8HRtDZafXl47BCxyGg</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p>',108),c=[n];function a(s,i){return e(),t("div",null,c)}var l=p(r,[["render",a],["__file","npe.html.vue"]]);export{l as default};
diff --git a/dist/assets/object-class.html.96fd3d4e.js b/dist/assets/object-class.html.698d849f.js
similarity index 99%
rename from dist/assets/object-class.html.96fd3d4e.js
rename to dist/assets/object-class.html.698d849f.js
index 9fe6a101..e66dc2c7 100644
--- a/dist/assets/object-class.html.96fd3d4e.js
+++ b/dist/assets/object-class.html.698d849f.js
@@ -1,4 +1,4 @@
-import{_ as e}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o as t,c as o,a as n,b as c,d as s,e as i}from"./app.a0271b9c.js";const l={},u=n("h1",{id:"\u600E\u4E48\u7406\u89E3java\u4E2D\u7C7B\u548C\u5BF9\u8C61\u7684\u6982\u5FF5",tabindex:"-1"},[n("a",{class:"header-anchor",href:"#\u600E\u4E48\u7406\u89E3java\u4E2D\u7C7B\u548C\u5BF9\u8C61\u7684\u6982\u5FF5","aria-hidden":"true"},"#"),s(" \u600E\u4E48\u7406\u89E3Java\u4E2D\u7C7B\u548C\u5BF9\u8C61\u7684\u6982\u5FF5\uFF1F")],-1),d=s("\u201C\u4E8C\u54E5\uFF0C\u6211\u90A3\u5929\u5728\u56FE\u4E66\u9986\u590D\u4E60"),k={href:"https://mp.weixin.qq.com/s/WzMEOEdzI0fFwBQ4s0S-0g",target:"_blank",rel:"noopener noreferrer"},r=s("\u4E0A\u4E00\u8282"),v=s("\u4F60\u8BB2\u7684\u5185\u5BB9\uFF0C\u521A\u597D\u78B0\u89C1\u4E00\u4E2A\u5B66\u957F\uFF0C\u4ED6\u95EE\u6211\u6709\u6CA1\u6709\u2018\u5BF9\u8C61\u2019\uFF0C\u6211\u8BF4\u8FD8\u6CA1\u6709\u554A\u3002\u7ED3\u679C\u4F60\u731C\u4ED6\u8BF4\u4EC0\u4E48\uFF0C\u2018\u8981\u4E0D\u8981\u6211\u7ED9\u4F60 new \u4E00\u4E2A\u554A\uFF1F\u2019\u6211\u5F53\u65F6\u5C31\u61F5\u4E86\uFF0Cnew \u662F\u5565\u610F\u601D\u554A\uFF0C\u4E8C\u54E5\uFF1F\u201D\u4E09\u59B9\u6EE1\u662F\u7591\u60D1\u7684\u95EE\u6211\u3002"),m=i(`<p>\u201C\u54C8\u54C8\uFF0C\u4E09\u59B9\uFF0C\u4F60\u5B66\u957F\u8FD8\u633A\u5E7D\u9ED8\u554A\u3002new \u662F Java \u4E2D\u7684\u4E00\u4E2A\u5173\u952E\u5B57\uFF0C\u7528\u6765\u628A\u7C7B\u53D8\u6210\u5BF9\u8C61\u3002\u201D\u6211\u7B11\u7740\u5BF9\u4E09\u59B9\u8BF4\uFF0C\u201C\u5BF9\u8C61\u548C\u7C7B\u662F Java \u4E2D\u6700\u57FA\u672C\u7684\u4E24\u4E2A\u6982\u5FF5\uFF0C\u53EF\u4EE5\u8BF4\u6491\u8D77\u4E86\u9762\u5411\u5BF9\u8C61\u7F16\u7A0B\uFF08OOP\uFF09\u7684\u4E00\u7247\u5929\u3002\u201D</p><h3 id="_01\u3001\u9762\u5411\u8FC7\u7A0B\u548C\u9762\u5411\u5BF9\u8C61" tabindex="-1"><a class="header-anchor" href="#_01\u3001\u9762\u5411\u8FC7\u7A0B\u548C\u9762\u5411\u5BF9\u8C61" aria-hidden="true">#</a> 01\u3001\u9762\u5411\u8FC7\u7A0B\u548C\u9762\u5411\u5BF9\u8C61</h3><p>\u4E09\u59B9\u662F\u4E0D\u662F\u8981\u95EE\uFF0C\u4EC0\u4E48\u662F OOP\uFF1F</p><p>OOP \u7684\u82F1\u6587\u5168\u79F0\u662F Object Oriented Programming\uFF0C\u8981\u7406\u89E3\u5B83\u7684\u8BDD\uFF0C\u5C31\u8981\u5148\u7406\u89E3\u9762\u5411\u5BF9\u8C61\uFF0C\u8981\u60F3\u7406\u89E3\u9762\u5411\u5BF9\u8C61\u7684\u8BDD\uFF0C\u5C31\u8981\u5148\u7406\u89E3\u9762\u5411\u8FC7\u7A0B\uFF0C\u56E0\u4E3A\u4E00\u5F00\u59CB\u6CA1\u6709\u9762\u5411\u5BF9\u8C61\u7684\u7F16\u7A0B\u8BED\u8A00\uFF0C\u90FD\u662F\u9762\u5411\u8FC7\u7A0B\u3002</p><p>\u4E3E\u4E2A\u7B80\u5355\u70B9\u7684\u4F8B\u5B50\u6765\u533A\u5206\u4E00\u4E0B\u9762\u5411\u8FC7\u7A0B\u548C\u9762\u5411\u5BF9\u8C61\u3002</p><p>\u6709\u4E00\u5929\uFF0C\u4F60\u60F3\u5403\u5C0F\u7897\u6C64\u4E86\uFF0C\u600E\u4E48\u529E\u5462\uFF1F\u6709\u4E24\u4E2A\u9009\u62E9\uFF1A</p><p>1\uFF09\u81EA\u5DF1\u4E70\u98DF\u6750\uFF0C\u8C46\u8150\u76AE\u554A\u3001\u8089\u554A\u3001\u849C\u82D4\u554A\u7B49\u7B49\uFF0C\u81EA\u5DF1\u52A8\u624B\u505A\u3002</p><p>2\uFF09\u5230\u996D\u5E97\u53BB\uFF0C\u53EA\u9700\u8981\u5BF9\u8001\u677F\u558A\u4E00\u58F0\uFF0C\u201C\u6765\u4EFD\u5C0F\u7897\u6C64\u3002\u201D</p><p>\u7B2C\u4E00\u79CD\u5C31\u662F\u9762\u5411\u8FC7\u7A0B\uFF0C\u7B2C\u4E8C\u79CD\u5C31\u662F\u9762\u5411\u5BF9\u8C61\u3002</p><p>\u9762\u5411\u8FC7\u7A0B\u6709\u4EC0\u4E48\u52A3\u52BF\u5462\uFF1F\u5047\u5982\u4F60\u4E70\u4E86\u5C0F\u7897\u6C64\u7684\u98DF\u6750\uFF0C\u4E34\u4E86\u53C8\u60F3\u5403\u5BAB\u4FDD\u9E21\u4E01\u4E86\uFF0C\u4F60\u662F\u4E0D\u662F\u8FD8\u5F97\u91CD\u65B0\u4E70\u98DF\u6750\uFF1F</p><p>\u9762\u5411\u5BF9\u8C61\u6709\u4EC0\u4E48\u4F18\u52BF\u5462\uFF1F\u5047\u5982\u4F60\u4E0D\u60F3\u5403\u5C0F\u7897\u6C64\u4E86\uFF0C\u4F60\u53EA\u9700\u8981\u5BF9\u8001\u677F\u8BF4\uFF0C\u201C\u6211\u90A3\u4E2A\u5C0F\u7897\u6C64\u5982\u679C\u6CA1\u505A\u7684\u8BDD\uFF0C\u6362\u6210\u5BAB\u4FDD\u9E21\u4E01\u5427\uFF01\u201D</p><p>\u9762\u5411\u8FC7\u7A0B\u662F\u6D41\u7A0B\u5316\u7684\uFF0C\u4E00\u6B65\u4E00\u6B65\uFF0C\u4E0A\u4E00\u6B65\u505A\u5B8C\u4E86\uFF0C\u518D\u505A\u4E0B\u4E00\u6B65\u3002</p><p>\u9762\u5411\u5BF9\u8C61\u662F\u6A21\u5757\u5316\u7684\uFF0C\u6211\u505A\u6211\u7684\uFF0C\u4F60\u505A\u4F60\u7684\uFF0C\u6211\u9700\u8981\u4F60\u505A\u7684\u8BDD\uFF0C\u6211\u5C31\u544A\u8BC9\u4F60\u4E00\u58F0\u3002\u6211\u4E0D\u9700\u8981\u77E5\u9053\u4F60\u5230\u5E95\u600E\u4E48\u505A\uFF0C\u53EA\u770B\u529F\u52B3\u4E0D\u770B\u82E6\u52B3\u3002</p><p>\u4E0D\u8FC7\uFF0C\u5982\u679C\u8FFD\u5230\u5E95\u7684\u8BDD\uFF0C\u9762\u5411\u5BF9\u8C61\u7684\u5E95\u5C42\u5176\u5B9E\u8FD8\u662F\u9762\u5411\u8FC7\u7A0B\uFF0C\u53EA\u4E0D\u8FC7\u628A\u9762\u5411\u8FC7\u7A0B\u8FDB\u884C\u4E86\u62BD\u8C61\u5316\uFF0C\u5C01\u88C5\u6210\u4E86\u7C7B\uFF0C\u65B9\u4FBF\u6211\u4EEC\u7684\u8C03\u7528\u3002</p><h3 id="_02\u3001\u7C7B" tabindex="-1"><a class="header-anchor" href="#_02\u3001\u7C7B" aria-hidden="true">#</a> 02\u3001\u7C7B</h3><p>\u5BF9\u8C61\u53EF\u4EE5\u662F\u73B0\u5B9E\u4E2D\u770B\u5F97\u89C1\u7684\u4EFB\u4F55\u7269\u4F53\uFF0C\u6BD4\u5982\u8BF4\uFF0C\u4E00\u53EA\u7279\u7ACB\u72EC\u884C\u7684\u732A\uFF1B\u4E5F\u53EF\u4EE5\u662F\u60F3\u8C61\u4E2D\u7684\u4EFB\u4F55\u865A\u62DF\u7269\u4F53\uFF0C\u6BD4\u5982\u8BF4\u80FD\u4E03\u5341\u4E8C\u53D8\u7684\u5B59\u609F\u7A7A\u3002</p><p>Java \u901A\u8FC7\u7C7B\uFF08class\uFF09\u6765\u5B9A\u4E49\u8FD9\u4E9B\u7269\u4F53\uFF0C\u8FD9\u4E9B\u7269\u4F53\u6709\u4EC0\u4E48\u72B6\u6001\uFF0C\u901A\u8FC7\u5B57\u6BB5\u6765\u5B9A\u4E49\uFF0C\u6BD4\u5982\u8BF4\u6BD4\u5982\u8BF4\u732A\u7684\u989C\u8272\u662F\u7EAF\u8272\u8FD8\u662F\u82B1\u8272\uFF1B\u8FD9\u4E9B\u7269\u4F53\u6709\u4EC0\u4E48\u884C\u4E3A\uFF0C\u901A\u8FC7\u65B9\u6CD5\u6765\u5B9A\u4E49\uFF0C\u6BD4\u5982\u8BF4\u732A\u4F1A\u5403\uFF0C\u4F1A\u7761\u89C9\u3002</p><p>\u6765\uFF0C\u5B9A\u4E49\u4E00\u4E2A\u7B80\u5355\u7684\u7C7B\u7ED9\u4F60\u770B\u770B\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token doc-comment comment">/**
+import{_ as e}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o as t,c as o,a as n,b as c,d as s,e as i}from"./app.615e41d8.js";const l={},u=n("h1",{id:"\u600E\u4E48\u7406\u89E3java\u4E2D\u7C7B\u548C\u5BF9\u8C61\u7684\u6982\u5FF5",tabindex:"-1"},[n("a",{class:"header-anchor",href:"#\u600E\u4E48\u7406\u89E3java\u4E2D\u7C7B\u548C\u5BF9\u8C61\u7684\u6982\u5FF5","aria-hidden":"true"},"#"),s(" \u600E\u4E48\u7406\u89E3Java\u4E2D\u7C7B\u548C\u5BF9\u8C61\u7684\u6982\u5FF5\uFF1F")],-1),d=s("\u201C\u4E8C\u54E5\uFF0C\u6211\u90A3\u5929\u5728\u56FE\u4E66\u9986\u590D\u4E60"),k={href:"https://mp.weixin.qq.com/s/WzMEOEdzI0fFwBQ4s0S-0g",target:"_blank",rel:"noopener noreferrer"},r=s("\u4E0A\u4E00\u8282"),v=s("\u4F60\u8BB2\u7684\u5185\u5BB9\uFF0C\u521A\u597D\u78B0\u89C1\u4E00\u4E2A\u5B66\u957F\uFF0C\u4ED6\u95EE\u6211\u6709\u6CA1\u6709\u2018\u5BF9\u8C61\u2019\uFF0C\u6211\u8BF4\u8FD8\u6CA1\u6709\u554A\u3002\u7ED3\u679C\u4F60\u731C\u4ED6\u8BF4\u4EC0\u4E48\uFF0C\u2018\u8981\u4E0D\u8981\u6211\u7ED9\u4F60 new \u4E00\u4E2A\u554A\uFF1F\u2019\u6211\u5F53\u65F6\u5C31\u61F5\u4E86\uFF0Cnew \u662F\u5565\u610F\u601D\u554A\uFF0C\u4E8C\u54E5\uFF1F\u201D\u4E09\u59B9\u6EE1\u662F\u7591\u60D1\u7684\u95EE\u6211\u3002"),m=i(`<p>\u201C\u54C8\u54C8\uFF0C\u4E09\u59B9\uFF0C\u4F60\u5B66\u957F\u8FD8\u633A\u5E7D\u9ED8\u554A\u3002new \u662F Java \u4E2D\u7684\u4E00\u4E2A\u5173\u952E\u5B57\uFF0C\u7528\u6765\u628A\u7C7B\u53D8\u6210\u5BF9\u8C61\u3002\u201D\u6211\u7B11\u7740\u5BF9\u4E09\u59B9\u8BF4\uFF0C\u201C\u5BF9\u8C61\u548C\u7C7B\u662F Java \u4E2D\u6700\u57FA\u672C\u7684\u4E24\u4E2A\u6982\u5FF5\uFF0C\u53EF\u4EE5\u8BF4\u6491\u8D77\u4E86\u9762\u5411\u5BF9\u8C61\u7F16\u7A0B\uFF08OOP\uFF09\u7684\u4E00\u7247\u5929\u3002\u201D</p><h3 id="_01\u3001\u9762\u5411\u8FC7\u7A0B\u548C\u9762\u5411\u5BF9\u8C61" tabindex="-1"><a class="header-anchor" href="#_01\u3001\u9762\u5411\u8FC7\u7A0B\u548C\u9762\u5411\u5BF9\u8C61" aria-hidden="true">#</a> 01\u3001\u9762\u5411\u8FC7\u7A0B\u548C\u9762\u5411\u5BF9\u8C61</h3><p>\u4E09\u59B9\u662F\u4E0D\u662F\u8981\u95EE\uFF0C\u4EC0\u4E48\u662F OOP\uFF1F</p><p>OOP \u7684\u82F1\u6587\u5168\u79F0\u662F Object Oriented Programming\uFF0C\u8981\u7406\u89E3\u5B83\u7684\u8BDD\uFF0C\u5C31\u8981\u5148\u7406\u89E3\u9762\u5411\u5BF9\u8C61\uFF0C\u8981\u60F3\u7406\u89E3\u9762\u5411\u5BF9\u8C61\u7684\u8BDD\uFF0C\u5C31\u8981\u5148\u7406\u89E3\u9762\u5411\u8FC7\u7A0B\uFF0C\u56E0\u4E3A\u4E00\u5F00\u59CB\u6CA1\u6709\u9762\u5411\u5BF9\u8C61\u7684\u7F16\u7A0B\u8BED\u8A00\uFF0C\u90FD\u662F\u9762\u5411\u8FC7\u7A0B\u3002</p><p>\u4E3E\u4E2A\u7B80\u5355\u70B9\u7684\u4F8B\u5B50\u6765\u533A\u5206\u4E00\u4E0B\u9762\u5411\u8FC7\u7A0B\u548C\u9762\u5411\u5BF9\u8C61\u3002</p><p>\u6709\u4E00\u5929\uFF0C\u4F60\u60F3\u5403\u5C0F\u7897\u6C64\u4E86\uFF0C\u600E\u4E48\u529E\u5462\uFF1F\u6709\u4E24\u4E2A\u9009\u62E9\uFF1A</p><p>1\uFF09\u81EA\u5DF1\u4E70\u98DF\u6750\uFF0C\u8C46\u8150\u76AE\u554A\u3001\u8089\u554A\u3001\u849C\u82D4\u554A\u7B49\u7B49\uFF0C\u81EA\u5DF1\u52A8\u624B\u505A\u3002</p><p>2\uFF09\u5230\u996D\u5E97\u53BB\uFF0C\u53EA\u9700\u8981\u5BF9\u8001\u677F\u558A\u4E00\u58F0\uFF0C\u201C\u6765\u4EFD\u5C0F\u7897\u6C64\u3002\u201D</p><p>\u7B2C\u4E00\u79CD\u5C31\u662F\u9762\u5411\u8FC7\u7A0B\uFF0C\u7B2C\u4E8C\u79CD\u5C31\u662F\u9762\u5411\u5BF9\u8C61\u3002</p><p>\u9762\u5411\u8FC7\u7A0B\u6709\u4EC0\u4E48\u52A3\u52BF\u5462\uFF1F\u5047\u5982\u4F60\u4E70\u4E86\u5C0F\u7897\u6C64\u7684\u98DF\u6750\uFF0C\u4E34\u4E86\u53C8\u60F3\u5403\u5BAB\u4FDD\u9E21\u4E01\u4E86\uFF0C\u4F60\u662F\u4E0D\u662F\u8FD8\u5F97\u91CD\u65B0\u4E70\u98DF\u6750\uFF1F</p><p>\u9762\u5411\u5BF9\u8C61\u6709\u4EC0\u4E48\u4F18\u52BF\u5462\uFF1F\u5047\u5982\u4F60\u4E0D\u60F3\u5403\u5C0F\u7897\u6C64\u4E86\uFF0C\u4F60\u53EA\u9700\u8981\u5BF9\u8001\u677F\u8BF4\uFF0C\u201C\u6211\u90A3\u4E2A\u5C0F\u7897\u6C64\u5982\u679C\u6CA1\u505A\u7684\u8BDD\uFF0C\u6362\u6210\u5BAB\u4FDD\u9E21\u4E01\u5427\uFF01\u201D</p><p>\u9762\u5411\u8FC7\u7A0B\u662F\u6D41\u7A0B\u5316\u7684\uFF0C\u4E00\u6B65\u4E00\u6B65\uFF0C\u4E0A\u4E00\u6B65\u505A\u5B8C\u4E86\uFF0C\u518D\u505A\u4E0B\u4E00\u6B65\u3002</p><p>\u9762\u5411\u5BF9\u8C61\u662F\u6A21\u5757\u5316\u7684\uFF0C\u6211\u505A\u6211\u7684\uFF0C\u4F60\u505A\u4F60\u7684\uFF0C\u6211\u9700\u8981\u4F60\u505A\u7684\u8BDD\uFF0C\u6211\u5C31\u544A\u8BC9\u4F60\u4E00\u58F0\u3002\u6211\u4E0D\u9700\u8981\u77E5\u9053\u4F60\u5230\u5E95\u600E\u4E48\u505A\uFF0C\u53EA\u770B\u529F\u52B3\u4E0D\u770B\u82E6\u52B3\u3002</p><p>\u4E0D\u8FC7\uFF0C\u5982\u679C\u8FFD\u5230\u5E95\u7684\u8BDD\uFF0C\u9762\u5411\u5BF9\u8C61\u7684\u5E95\u5C42\u5176\u5B9E\u8FD8\u662F\u9762\u5411\u8FC7\u7A0B\uFF0C\u53EA\u4E0D\u8FC7\u628A\u9762\u5411\u8FC7\u7A0B\u8FDB\u884C\u4E86\u62BD\u8C61\u5316\uFF0C\u5C01\u88C5\u6210\u4E86\u7C7B\uFF0C\u65B9\u4FBF\u6211\u4EEC\u7684\u8C03\u7528\u3002</p><h3 id="_02\u3001\u7C7B" tabindex="-1"><a class="header-anchor" href="#_02\u3001\u7C7B" aria-hidden="true">#</a> 02\u3001\u7C7B</h3><p>\u5BF9\u8C61\u53EF\u4EE5\u662F\u73B0\u5B9E\u4E2D\u770B\u5F97\u89C1\u7684\u4EFB\u4F55\u7269\u4F53\uFF0C\u6BD4\u5982\u8BF4\uFF0C\u4E00\u53EA\u7279\u7ACB\u72EC\u884C\u7684\u732A\uFF1B\u4E5F\u53EF\u4EE5\u662F\u60F3\u8C61\u4E2D\u7684\u4EFB\u4F55\u865A\u62DF\u7269\u4F53\uFF0C\u6BD4\u5982\u8BF4\u80FD\u4E03\u5341\u4E8C\u53D8\u7684\u5B59\u609F\u7A7A\u3002</p><p>Java \u901A\u8FC7\u7C7B\uFF08class\uFF09\u6765\u5B9A\u4E49\u8FD9\u4E9B\u7269\u4F53\uFF0C\u8FD9\u4E9B\u7269\u4F53\u6709\u4EC0\u4E48\u72B6\u6001\uFF0C\u901A\u8FC7\u5B57\u6BB5\u6765\u5B9A\u4E49\uFF0C\u6BD4\u5982\u8BF4\u6BD4\u5982\u8BF4\u732A\u7684\u989C\u8272\u662F\u7EAF\u8272\u8FD8\u662F\u82B1\u8272\uFF1B\u8FD9\u4E9B\u7269\u4F53\u6709\u4EC0\u4E48\u884C\u4E3A\uFF0C\u901A\u8FC7\u65B9\u6CD5\u6765\u5B9A\u4E49\uFF0C\u6BD4\u5982\u8BF4\u732A\u4F1A\u5403\uFF0C\u4F1A\u7761\u89C9\u3002</p><p>\u6765\uFF0C\u5B9A\u4E49\u4E00\u4E2A\u7B80\u5355\u7684\u7C7B\u7ED9\u4F60\u770B\u770B\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token doc-comment comment">/**
  * \u5FAE\u4FE1\u641C\u7D22\u300C\u6C89\u9ED8\u738B\u4E8C\u300D\uFF0C\u56DE\u590D Java
  *
  * <span class="token keyword">@author</span> \u6C89\u9ED8\u738B\u4E8C
diff --git a/dist/assets/oom.html.d0512b48.js b/dist/assets/oom.html.cbfa1fb6.js
similarity index 99%
rename from dist/assets/oom.html.d0512b48.js
rename to dist/assets/oom.html.cbfa1fb6.js
index cfdea03a..65e74b27 100644
--- a/dist/assets/oom.html.d0512b48.js
+++ b/dist/assets/oom.html.cbfa1fb6.js
@@ -1 +1 @@
-import{_ as t}from"./plugin-vue_export-helper.21dcd24c.js";import{r,o as p,c as o,a as e,b as c,e as s,d}from"./app.a0271b9c.js";const i={},n=s('<h1 id="\u4E00\u6B21\u5185\u5B58\u6EA2\u51FA\u6392\u67E5\u4F18\u5316\u5B9E\u6218" tabindex="-1"><a class="header-anchor" href="#\u4E00\u6B21\u5185\u5B58\u6EA2\u51FA\u6392\u67E5\u4F18\u5316\u5B9E\u6218" aria-hidden="true">#</a> \u4E00\u6B21\u5185\u5B58\u6EA2\u51FA\u6392\u67E5\u4F18\u5316\u5B9E\u6218</h1><h2 id="\u524D\u8A00" tabindex="-1"><a class="header-anchor" href="#\u524D\u8A00" aria-hidden="true">#</a> \u524D\u8A00</h2><p><code>OutOfMemoryError</code> \u95EE\u9898\u76F8\u4FE1\u5F88\u591A\u670B\u53CB\u90FD\u9047\u5230\u8FC7\uFF0C\u76F8\u5BF9\u4E8E\u5E38\u89C1\u7684\u4E1A\u52A1\u5F02\u5E38\uFF08\u6570\u7EC4\u8D8A\u754C\u3001\u7A7A\u6307\u9488\u7B49\uFF09\u6765\u8BF4\u8FD9\u7C7B\u95EE\u9898\u662F\u5F88\u96BE\u5B9A\u4F4D\u548C\u89E3\u51B3\u7684\u3002</p><p>\u672C\u6587\u4EE5\u6700\u8FD1\u78B0\u5230\u7684\u4E00\u6B21\u7EBF\u4E0A\u5185\u5B58\u6EA2\u51FA\u7684\u5B9A\u4F4D\u3001\u89E3\u51B3\u95EE\u9898\u7684\u65B9\u5F0F\u5C55\u5F00\uFF1B\u5E0C\u671B\u80FD\u5BF9\u78B0\u5230\u7C7B\u4F3C\u95EE\u9898\u7684\u540C\u5B66\u5E26\u6765\u601D\u8DEF\u548C\u5E2E\u52A9\u3002</p><p>\u4E3B\u8981\u4ECE<code>\u8868\u73B0--&gt;\u6392\u67E5--&gt;\u5B9A\u4F4D--&gt;\u89E3\u51B3</code> \u56DB\u4E2A\u6B65\u9AA4\u6765\u5206\u6790\u548C\u89E3\u51B3\u95EE\u9898\u3002</p><h2 id="\u8868\u8C61" tabindex="-1"><a class="header-anchor" href="#\u8868\u8C61" aria-hidden="true">#</a> \u8868\u8C61</h2><p>\u6700\u8FD1\u6211\u4EEC\u751F\u4EA7\u4E0A\u7684\u4E00\u4E2A\u5E94\u7528\u4E0D\u65AD\u7684\u7206\u51FA\u5185\u5B58\u6EA2\u51FA\uFF0C\u5E76\u4E14\u968F\u7740\u4E1A\u52A1\u91CF\u7684\u589E\u957F\u51FA\u73B0\u7684\u9891\u6B21\u8D8A\u6765\u8D8A\u9AD8\u3002</p><p>\u8BE5\u7A0B\u5E8F\u7684\u4E1A\u52A1\u903B\u8F91\u975E\u5E38\u7B80\u5355\uFF0C\u5C31\u662F\u4ECE Kafka \u4E2D\u5C06\u6570\u636E\u6D88\u8D39\u4E0B\u6765\u7136\u540E\u6279\u91CF\u7684\u505A\u6301\u4E45\u5316\u64CD\u4F5C\u3002</p><p>\u800C\u73B0\u8C61\u5219\u662F\u968F\u7740 Kafka \u7684\u6D88\u606F\u8D8A\u591A\uFF0C\u51FA\u73B0\u7684\u5F02\u5E38\u7684\u9891\u6B21\u5C31\u8D8A\u5FEB\u3002\u7531\u4E8E\u5F53\u65F6\u8FD8\u6709\u5176\u4ED6\u5DE5\u4F5C\u6240\u4EE5\u53EA\u80FD\u8BA9\u8FD0\u7EF4\u505A\u91CD\u542F\uFF0C\u5E76\u4E14\u76D1\u63A7\u597D\u5806\u5185\u5B58\u4EE5\u53CA GC \u60C5\u51B5\u3002</p><blockquote><p>\u91CD\u542F\u5927\u6CD5\u867D\u597D\uFF0C\u53EF\u662F\u4F9D\u7136\u4E0D\u80FD\u6839\u672C\u89E3\u51B3\u95EE\u9898\u3002</p></blockquote><h2 id="\u6392\u67E5" tabindex="-1"><a class="header-anchor" href="#\u6392\u67E5" aria-hidden="true">#</a> \u6392\u67E5</h2><p>\u4E8E\u662F\u6211\u4EEC\u60F3\u6839\u636E\u8FD0\u7EF4\u4E4B\u524D\u6536\u96C6\u5230\u7684\u5185\u5B58\u6570\u636E\u3001GC \u65E5\u5FD7\u5C1D\u8BD5\u5224\u65AD\u54EA\u91CC\u51FA\u73B0\u95EE\u9898\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/oom-81051388-0c35-4de6-a3d9-4f546ef4bfec.jpg" alt=""></p><p>\u7ED3\u679C\u53D1\u73B0\u8001\u5E74\u4EE3\u7684\u5185\u5B58\u4F7F\u7528\u5C31\u7B97\u662F\u53D1\u751F GC \u4E5F\u4E00\u76F4\u5C45\u9AD8\u4E0D\u4E0B\uFF0C\u800C\u4E14\u968F\u7740\u65F6\u95F4\u63A8\u79FB\u4E5F\u8D8A\u6765\u8D8A\u9AD8\u3002</p><p>\u7ED3\u5408 jstat \u7684\u65E5\u5FD7\u53D1\u73B0\u5C31\u7B97\u662F\u53D1\u751F\u4E86 FGC \u8001\u5E74\u4EE3\u4E5F\u5DF2\u7ECF\u56DE\u6536\u4E0D\u4E86\uFF0C\u5185\u5B58\u5DF2\u7ECF\u5230\u9876\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/oom-e79d4da0-fbb1-4918-a8d8-e29d2d64323b.jpg" alt=""></p><p>\u751A\u81F3\u6709\u51E0\u53F0\u5E94\u7528 FGC \u8FBE\u5230\u4E86\u4E0A\u767E\u6B21\uFF0C\u65F6\u95F4\u4E5F\u9AD8\u7684\u53EF\u6015\u3002</p><p>\u8FD9\u8BF4\u660E\u5E94\u7528\u7684\u5185\u5B58\u4F7F\u7528\u80AF\u5B9A\u662F\u6709\u95EE\u9898\u7684\uFF0C\u6709\u8BB8\u591A\u8D56\u76AE\u5BF9\u8C61\u59CB\u7EC8\u56DE\u6536\u4E0D\u6389\u3002</p><h2 id="\u5B9A\u4F4D" tabindex="-1"><a class="header-anchor" href="#\u5B9A\u4F4D" aria-hidden="true">#</a> \u5B9A\u4F4D</h2><p>\u7531\u4E8E\u751F\u4EA7\u4E0A\u7684\u5185\u5B58 dump \u6587\u4EF6\u975E\u5E38\u5927\uFF0C\u8FBE\u5230\u4E86\u51E0\u5341G\u3002\u4E5F\u662F\u7531\u4E8E\u6211\u4EEC\u7684\u5185\u5B58\u8BBE\u7F6E\u592A\u5927\u6709\u5173\u3002</p><p>\u6240\u4EE5\u5BFC\u81F4\u60F3\u4F7F\u7528 MAT \u5206\u6790\u9700\u8981\u82B1\u8D39\u5927\u91CF\u65F6\u95F4\u3002</p><p>\u56E0\u6B64\u6211\u4EEC\u4FBF\u60F3\u662F\u5426\u53EF\u4EE5\u5728\u672C\u5730\u590D\u73B0\uFF0C\u8FD9\u6837\u5C31\u8981\u597D\u5B9A\u4F4D\u7684\u591A\u3002</p><p>\u4E3A\u4E86\u5C3D\u5FEB\u7684\u590D\u73B0\u95EE\u9898\uFF0C\u6211\u5C06\u672C\u5730\u5E94\u7528\u6700\u5927\u5806\u5185\u5B58\u8BBE\u7F6E\u4E3A 150M\u3002</p><p>\u7136\u540E\u5728\u6D88\u8D39 Kafka \u90A3\u91CC Mock \u4E3A\u4E00\u4E2A while \u5FAA\u73AF\u4E00\u76F4\u4E0D\u65AD\u7684\u751F\u6210\u6570\u636E\u3002</p><p>\u540C\u65F6\u5F53\u5E94\u7528\u542F\u52A8\u4E4B\u540E\u5229\u7528 VisualVM \u8FDE\u4E0A\u5E94\u7528\u5B9E\u65F6\u76D1\u63A7\u5185\u5B58\u3001GC \u7684\u4F7F\u7528\u60C5\u51B5\u3002</p><p>\u7ED3\u679C\u8DD1\u4E86 10 \u51E0\u5206\u949F\u5185\u5B58\u4F7F\u7528\u5E76\u6CA1\u6709\u4EC0\u4E48\u95EE\u9898\u3002\u6839\u636E\u56FE\u4E2D\u53EF\u4EE5\u770B\u51FA\uFF0C\u6BCF\u4EA7\u751F\u4E00\u6B21 GC \u5185\u5B58\u90FD\u80FD\u6709\u6548\u7684\u56DE\u6536\uFF0C\u6240\u4EE5\u8FD9\u6837\u5E76\u6CA1\u6709\u590D\u73B0\u95EE\u9898\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/oom-4cf05af0-924f-406b-a8a4-5aa885e38cea.jpg" alt=""></p><p>\u6CA1\u6CD5\u590D\u73B0\u95EE\u9898\u5C31\u5F88\u96BE\u5B9A\u4F4D\u4E86\u3002\u4E8E\u662F\u6211\u4EEC review \u4EE3\u7801\uFF0C\u53D1\u73B0\u751F\u4EA7\u7684\u903B\u8F91\u548C\u6211\u4EEC\u7528 while \u5FAA\u73AF Mock \u6570\u636E\u8FD8\u4E0D\u592A\u4E00\u6837\u3002</p><p>\u67E5\u770B\u751F\u4EA7\u7684\u65E5\u5FD7\u53D1\u73B0\u6BCF\u6B21\u4ECE Kafka \u4E2D\u53D6\u51FA\u7684\u90FD\u662F\u51E0\u767E\u6761\u6570\u636E\uFF0C\u800C\u6211\u4EEC Mock \u65F6\u6BCF\u6B21\u53EA\u80FD\u4EA7\u751F<strong>\u4E00\u6761</strong>\u3002</p><p>\u4E3A\u4E86\u5C3D\u53EF\u80FD\u7684\u6A21\u62DF\u751F\u4EA7\u60C5\u51B5\u4FBF\u5728\u670D\u52A1\u5668\u4E0A\u8DD1\u7740\u4E00\u4E2A\u751F\u4EA7\u8005\u7A0B\u5E8F\uFF0C\u4E00\u76F4\u6E90\u6E90\u4E0D\u65AD\u7684\u5411 Kafka \u4E2D\u53D1\u9001\u6570\u636E\u3002</p><p>\u679C\u7136\u4E0D\u51FA\u610F\u5916\u53EA\u8DD1\u4E86\u4E00\u5206\u591A\u949F\u5185\u5B58\u5C31\u9876\u4E0D\u4F4F\u4E86\uFF0C\u89C2\u5BDF\u5DE6\u56FE\u53D1\u73B0 GC \u7684\u9891\u6B21\u975E\u5E38\u9AD8\uFF0C\u4F46\u662F\u5185\u5B58\u7684\u56DE\u6536\u5374\u662F\u76F8\u5F62\u89C1\u62D9\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/oom-a6d6c9cd-e79c-4a76-ba97-032cfefefd5f.jpg" alt=""></p><p>\u540C\u65F6\u540E\u53F0\u4E5F\u5F00\u59CB\u6253\u5370\u5185\u5B58\u6EA2\u51FA\u4E86\uFF0C\u8FD9\u6837\u4FBF\u590D\u73B0\u51FA\u95EE\u9898\u3002</p><h2 id="\u89E3\u51B3" tabindex="-1"><a class="header-anchor" href="#\u89E3\u51B3" aria-hidden="true">#</a> \u89E3\u51B3</h2><p>\u4ECE\u76EE\u524D\u7684\u8868\u73B0\u6765\u770B\u5C31\u662F\u5185\u5B58\u4E2D\u6709\u8BB8\u591A\u5BF9\u8C61\u4E00\u76F4\u5B58\u5728\u5F3A\u5F15\u7528\u5173\u7CFB\u5BFC\u81F4\u5F97\u4E0D\u5230\u56DE\u6536\u3002</p><p>\u4E8E\u662F\u4FBF\u60F3\u770B\u770B\u5230\u5E95\u662F\u4EC0\u4E48\u5BF9\u8C61\u5360\u7528\u4E86\u8FD9\u4E48\u591A\u7684\u5185\u5B58\uFF0C\u5229\u7528 VisualVM \u7684 HeapDump \u529F\u80FD\u53EF\u4EE5\u7ACB\u5373 dump \u51FA\u5F53\u524D\u5E94\u7528\u7684\u5185\u5B58\u60C5\u51B5\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/oom-49b47ca3-b3e2-49f7-85c9-23f7a3ef6f93.jpg" alt=""></p><p>\u7ED3\u679C\u53D1\u73B0 <code>com.lmax.disruptor.RingBuffer</code> \u7C7B\u578B\u7684\u5BF9\u8C61\u5360\u7528\u4E86\u5C06\u8FD1 50% \u7684\u5185\u5B58\u3002</p><p>\u770B\u5230\u8FD9\u4E2A\u5305\u81EA\u7136\u5C31\u60F3\u5230\u4E86 <code>Disruptor</code> \u73AF\u5F62\u961F\u5217\u3002</p><p>\u518D\u6B21 review \u4EE3\u7801\u53D1\u73B0\uFF1A\u4ECE Kafka \u91CC\u53D6\u51FA\u7684 700 \u6761\u6570\u636E\u662F\u76F4\u63A5\u5F80 Disruptor \u91CC\u4E22\u7684\u3002</p><p>\u8FD9\u91CC\u4E5F\u5C31\u80FD\u8BF4\u660E\u4E3A\u4EC0\u4E48\u7B2C\u4E00\u6B21\u6A21\u62DF\u6570\u636E\u6CA1\u590D\u73B0\u95EE\u9898\u4E86\u3002</p><p>\u6A21\u62DF\u7684\u65F6\u5019\u662F\u4E00\u4E2A\u5BF9\u8C61\u653E\u8FDB\u961F\u5217\u91CC\uFF0C\u800C\u751F\u4EA7\u7684\u60C5\u51B5\u662F 700 \u6761\u6570\u636E\u653E\u8FDB\u961F\u5217\u91CC\u3002\u8FD9\u4E2A\u6570\u636E\u91CF\u662F 700 \u500D\u7684\u5DEE\u8DDD\u3002</p><p>\u800C Disruptor \u4F5C\u4E3A\u4E00\u4E2A\u73AF\u5F62\u961F\u5217\uFF0C\u518D\u5BF9\u8C61\u6CA1\u6709\u88AB\u8986\u76D6\u4E4B\u524D\u662F\u4E00\u76F4\u5B58\u5728\u7684\u3002</p><p>\u6211\u4E5F\u505A\u4E86\u4E00\u4E2A\u5B9E\u9A8C\uFF0C\u8BC1\u660E\u786E\u5B9E\u5982\u6B64\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/oom-dee49da6-905a-4085-b82e-41e136d422e8.jpg" alt=""></p><p>\u6211\u8BBE\u7F6E\u961F\u5217\u5927\u5C0F\u4E3A 8 \uFF0C\u4ECE 0~9 \u5F80\u91CC\u9762\u5199 10 \u6761\u6570\u636E\uFF0C\u5F53\u5199\u5230 8 \u7684\u65F6\u5019\u5C31\u4F1A\u628A\u4E4B\u524D 0 \u7684\u4F4D\u7F6E\u8986\u76D6\u6389\uFF0C\u540E\u9762\u7684\u4EE5\u6B64\u7C7B\u63A8\uFF08\u7C7B\u4F3C\u4E8E HashMap \u7684\u53D6\u6A21\u5B9A\u4F4D\uFF09\u3002</p><p>\u6240\u4EE5\u5728\u751F\u4EA7\u4E0A\u5047\u8BBE\u6211\u4EEC\u7684\u961F\u5217\u5927\u5C0F\u662F 1024\uFF0C\u90A3\u4E48\u968F\u7740\u7CFB\u7EDF\u7684\u8FD0\u884C\u6700\u7EC8\u80AF\u5B9A\u4F1A\u5BFC\u81F4 1024 \u4E2A\u4F4D\u7F6E\u4E0A\u88C5\u6EE1\u4E86\u5BF9\u8C61\uFF0C\u800C\u4E14\u6BCF\u4E2A\u4F4D\u7F6E\u662F 700 \u4E2A\uFF01</p><p>\u4E8E\u662F\u67E5\u770B\u4E86\u751F\u4EA7\u4E0A Disruptor \u7684 RingBuffer \u914D\u7F6E\uFF0C\u7ED3\u679C\u662F\uFF1A<code>1024*1024</code>\u3002</p><p>\u8FD9\u4E2A\u6570\u91CF\u7EA7\u5C31\u975E\u5E38\u5413\u4EBA\u4E86\u3002</p><p>\u4E3A\u4E86\u9A8C\u8BC1\u662F\u5426\u662F\u8FD9\u4E2A\u95EE\u9898\uFF0C\u6211\u5728\u672C\u5730\u5C06\u8BE5\u503C\u6362\u4E3A 2 \uFF0C\u4E00\u4E2A\u6700\u5C0F\u503C\u8BD5\u8BD5\u3002</p><p>\u540C\u6837\u7684 128M \u5185\u5B58\uFF0C\u4E5F\u662F\u901A\u8FC7 Kafka \u4E00\u76F4\u6E90\u6E90\u4E0D\u65AD\u7684\u53D6\u51FA\u6570\u636E\u3002\u901A\u8FC7\u76D1\u63A7\u5982\u4E0B\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/oom-5529781f-1f68-47a7-a3d2-04eba9e9d52e.jpg" alt=""></p><p>\u8DD1\u4E86 20 \u51E0\u5206\u949F\u7CFB\u7EDF\u4E00\u5207\u6B63\u5E38\uFF0C\u6BCF\u5F53\u4E00\u6B21 GC \u90FD\u80FD\u56DE\u6536\u5927\u90E8\u5206\u5185\u5B58\uFF0C\u6700\u7EC8\u5448\u73B0\u952F\u9F7F\u72B6\u3002</p><p>\u8FD9\u6837\u95EE\u9898\u5C31\u627E\u5230\u4E86\uFF0C\u4E0D\u8FC7\u751F\u4EA7\u4E0A\u8FD9\u4E2A\u503C\u5177\u4F53\u8BBE\u7F6E\u591A\u5C11\u8FD8\u5F97\u6839\u636E\u4E1A\u52A1\u60C5\u51B5\u6D4B\u8BD5\u624D\u80FD\u77E5\u9053\uFF0C\u4F46\u539F\u6709\u7684 1024*1024 \u662F\u7EDD\u5BF9\u4E0D\u80FD\u518D\u4F7F\u7528\u4E86\u3002</p><h2 id="\u603B\u7ED3" tabindex="-1"><a class="header-anchor" href="#\u603B\u7ED3" aria-hidden="true">#</a> \u603B\u7ED3</h2><p>\u867D\u7136\u5230\u4E86\u6700\u540E\u4E5F\u5C31\u6539\u4E86\u4E00\u884C\u4EE3\u7801(\u8FD8\u6CA1\u6539\uFF0C\u76F4\u63A5\u4FEE\u6539\u914D\u7F6E)\uFF0C\u4F46\u8FD9\u6392\u67E5\u8FC7\u7A0B\u6211\u89C9\u5F97\u662F\u6709\u610F\u4E49\u7684\u3002</p><p>\u4E5F\u4F1A\u8BA9\u5927\u90E8\u5206\u89C9\u5F97 JVM \u8FD9\u6837\u7684\u9ED1\u76D2\u96BE\u4EE5\u4E0B\u624B\u7684\u540C\u5B66\u6709\u4E00\u4E2A\u76F4\u89C2\u7684\u611F\u53D7\u3002</p><p><code>\u540C\u65F6\u4E5F\u5F97\u611F\u53F9 Disruptor \u4E1C\u897F\u867D\u597D\uFF0C\u4E5F\u4E0D\u80FD\u4E71\u7528\u54E6\uFF01</code></p><p>\u76F8\u5173\u6F14\u793A\u4EE3\u7801\u67E5\u770B\uFF1A</p>',59),h={href:"https://github.com/crossoverJie/JCSprout/tree/master/src/main/java/com/crossoverjie/disruptor",target:"_blank",rel:"noopener noreferrer"},m=d("https://github.com/crossoverJie/JCSprout/tree/master/src/main/java/com/crossoverjie/disruptor"),b=e("p",null,[e("strong",null,"\u4F60\u7684\u70B9\u8D5E\u4E0E\u8F6C\u53D1\u662F\u6700\u5927\u7684\u652F\u6301\u3002")],-1),f=e("p",null,"\u539F\u6587\u94FE\u63A5\uFF1Ahttps://crossoverjie.top/2018/08/29/java-senior/OOM-Disruptor/",-1),l=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png",alt:""})],-1);function u(g,j){const a=r("ExternalLinkIcon");return p(),o("div",null,[n,e("p",null,[e("a",h,[m,c(a)])]),b,f,l])}var k=t(i,[["render",u],["__file","oom.html.vue"]]);export{k as default};
+import{_ as t}from"./plugin-vue_export-helper.21dcd24c.js";import{r,o as p,c as o,a as e,b as c,e as s,d}from"./app.615e41d8.js";const i={},n=s('<h1 id="\u4E00\u6B21\u5185\u5B58\u6EA2\u51FA\u6392\u67E5\u4F18\u5316\u5B9E\u6218" tabindex="-1"><a class="header-anchor" href="#\u4E00\u6B21\u5185\u5B58\u6EA2\u51FA\u6392\u67E5\u4F18\u5316\u5B9E\u6218" aria-hidden="true">#</a> \u4E00\u6B21\u5185\u5B58\u6EA2\u51FA\u6392\u67E5\u4F18\u5316\u5B9E\u6218</h1><h2 id="\u524D\u8A00" tabindex="-1"><a class="header-anchor" href="#\u524D\u8A00" aria-hidden="true">#</a> \u524D\u8A00</h2><p><code>OutOfMemoryError</code> \u95EE\u9898\u76F8\u4FE1\u5F88\u591A\u670B\u53CB\u90FD\u9047\u5230\u8FC7\uFF0C\u76F8\u5BF9\u4E8E\u5E38\u89C1\u7684\u4E1A\u52A1\u5F02\u5E38\uFF08\u6570\u7EC4\u8D8A\u754C\u3001\u7A7A\u6307\u9488\u7B49\uFF09\u6765\u8BF4\u8FD9\u7C7B\u95EE\u9898\u662F\u5F88\u96BE\u5B9A\u4F4D\u548C\u89E3\u51B3\u7684\u3002</p><p>\u672C\u6587\u4EE5\u6700\u8FD1\u78B0\u5230\u7684\u4E00\u6B21\u7EBF\u4E0A\u5185\u5B58\u6EA2\u51FA\u7684\u5B9A\u4F4D\u3001\u89E3\u51B3\u95EE\u9898\u7684\u65B9\u5F0F\u5C55\u5F00\uFF1B\u5E0C\u671B\u80FD\u5BF9\u78B0\u5230\u7C7B\u4F3C\u95EE\u9898\u7684\u540C\u5B66\u5E26\u6765\u601D\u8DEF\u548C\u5E2E\u52A9\u3002</p><p>\u4E3B\u8981\u4ECE<code>\u8868\u73B0--&gt;\u6392\u67E5--&gt;\u5B9A\u4F4D--&gt;\u89E3\u51B3</code> \u56DB\u4E2A\u6B65\u9AA4\u6765\u5206\u6790\u548C\u89E3\u51B3\u95EE\u9898\u3002</p><h2 id="\u8868\u8C61" tabindex="-1"><a class="header-anchor" href="#\u8868\u8C61" aria-hidden="true">#</a> \u8868\u8C61</h2><p>\u6700\u8FD1\u6211\u4EEC\u751F\u4EA7\u4E0A\u7684\u4E00\u4E2A\u5E94\u7528\u4E0D\u65AD\u7684\u7206\u51FA\u5185\u5B58\u6EA2\u51FA\uFF0C\u5E76\u4E14\u968F\u7740\u4E1A\u52A1\u91CF\u7684\u589E\u957F\u51FA\u73B0\u7684\u9891\u6B21\u8D8A\u6765\u8D8A\u9AD8\u3002</p><p>\u8BE5\u7A0B\u5E8F\u7684\u4E1A\u52A1\u903B\u8F91\u975E\u5E38\u7B80\u5355\uFF0C\u5C31\u662F\u4ECE Kafka \u4E2D\u5C06\u6570\u636E\u6D88\u8D39\u4E0B\u6765\u7136\u540E\u6279\u91CF\u7684\u505A\u6301\u4E45\u5316\u64CD\u4F5C\u3002</p><p>\u800C\u73B0\u8C61\u5219\u662F\u968F\u7740 Kafka \u7684\u6D88\u606F\u8D8A\u591A\uFF0C\u51FA\u73B0\u7684\u5F02\u5E38\u7684\u9891\u6B21\u5C31\u8D8A\u5FEB\u3002\u7531\u4E8E\u5F53\u65F6\u8FD8\u6709\u5176\u4ED6\u5DE5\u4F5C\u6240\u4EE5\u53EA\u80FD\u8BA9\u8FD0\u7EF4\u505A\u91CD\u542F\uFF0C\u5E76\u4E14\u76D1\u63A7\u597D\u5806\u5185\u5B58\u4EE5\u53CA GC \u60C5\u51B5\u3002</p><blockquote><p>\u91CD\u542F\u5927\u6CD5\u867D\u597D\uFF0C\u53EF\u662F\u4F9D\u7136\u4E0D\u80FD\u6839\u672C\u89E3\u51B3\u95EE\u9898\u3002</p></blockquote><h2 id="\u6392\u67E5" tabindex="-1"><a class="header-anchor" href="#\u6392\u67E5" aria-hidden="true">#</a> \u6392\u67E5</h2><p>\u4E8E\u662F\u6211\u4EEC\u60F3\u6839\u636E\u8FD0\u7EF4\u4E4B\u524D\u6536\u96C6\u5230\u7684\u5185\u5B58\u6570\u636E\u3001GC \u65E5\u5FD7\u5C1D\u8BD5\u5224\u65AD\u54EA\u91CC\u51FA\u73B0\u95EE\u9898\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/oom-81051388-0c35-4de6-a3d9-4f546ef4bfec.jpg" alt=""></p><p>\u7ED3\u679C\u53D1\u73B0\u8001\u5E74\u4EE3\u7684\u5185\u5B58\u4F7F\u7528\u5C31\u7B97\u662F\u53D1\u751F GC \u4E5F\u4E00\u76F4\u5C45\u9AD8\u4E0D\u4E0B\uFF0C\u800C\u4E14\u968F\u7740\u65F6\u95F4\u63A8\u79FB\u4E5F\u8D8A\u6765\u8D8A\u9AD8\u3002</p><p>\u7ED3\u5408 jstat \u7684\u65E5\u5FD7\u53D1\u73B0\u5C31\u7B97\u662F\u53D1\u751F\u4E86 FGC \u8001\u5E74\u4EE3\u4E5F\u5DF2\u7ECF\u56DE\u6536\u4E0D\u4E86\uFF0C\u5185\u5B58\u5DF2\u7ECF\u5230\u9876\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/oom-e79d4da0-fbb1-4918-a8d8-e29d2d64323b.jpg" alt=""></p><p>\u751A\u81F3\u6709\u51E0\u53F0\u5E94\u7528 FGC \u8FBE\u5230\u4E86\u4E0A\u767E\u6B21\uFF0C\u65F6\u95F4\u4E5F\u9AD8\u7684\u53EF\u6015\u3002</p><p>\u8FD9\u8BF4\u660E\u5E94\u7528\u7684\u5185\u5B58\u4F7F\u7528\u80AF\u5B9A\u662F\u6709\u95EE\u9898\u7684\uFF0C\u6709\u8BB8\u591A\u8D56\u76AE\u5BF9\u8C61\u59CB\u7EC8\u56DE\u6536\u4E0D\u6389\u3002</p><h2 id="\u5B9A\u4F4D" tabindex="-1"><a class="header-anchor" href="#\u5B9A\u4F4D" aria-hidden="true">#</a> \u5B9A\u4F4D</h2><p>\u7531\u4E8E\u751F\u4EA7\u4E0A\u7684\u5185\u5B58 dump \u6587\u4EF6\u975E\u5E38\u5927\uFF0C\u8FBE\u5230\u4E86\u51E0\u5341G\u3002\u4E5F\u662F\u7531\u4E8E\u6211\u4EEC\u7684\u5185\u5B58\u8BBE\u7F6E\u592A\u5927\u6709\u5173\u3002</p><p>\u6240\u4EE5\u5BFC\u81F4\u60F3\u4F7F\u7528 MAT \u5206\u6790\u9700\u8981\u82B1\u8D39\u5927\u91CF\u65F6\u95F4\u3002</p><p>\u56E0\u6B64\u6211\u4EEC\u4FBF\u60F3\u662F\u5426\u53EF\u4EE5\u5728\u672C\u5730\u590D\u73B0\uFF0C\u8FD9\u6837\u5C31\u8981\u597D\u5B9A\u4F4D\u7684\u591A\u3002</p><p>\u4E3A\u4E86\u5C3D\u5FEB\u7684\u590D\u73B0\u95EE\u9898\uFF0C\u6211\u5C06\u672C\u5730\u5E94\u7528\u6700\u5927\u5806\u5185\u5B58\u8BBE\u7F6E\u4E3A 150M\u3002</p><p>\u7136\u540E\u5728\u6D88\u8D39 Kafka \u90A3\u91CC Mock \u4E3A\u4E00\u4E2A while \u5FAA\u73AF\u4E00\u76F4\u4E0D\u65AD\u7684\u751F\u6210\u6570\u636E\u3002</p><p>\u540C\u65F6\u5F53\u5E94\u7528\u542F\u52A8\u4E4B\u540E\u5229\u7528 VisualVM \u8FDE\u4E0A\u5E94\u7528\u5B9E\u65F6\u76D1\u63A7\u5185\u5B58\u3001GC \u7684\u4F7F\u7528\u60C5\u51B5\u3002</p><p>\u7ED3\u679C\u8DD1\u4E86 10 \u51E0\u5206\u949F\u5185\u5B58\u4F7F\u7528\u5E76\u6CA1\u6709\u4EC0\u4E48\u95EE\u9898\u3002\u6839\u636E\u56FE\u4E2D\u53EF\u4EE5\u770B\u51FA\uFF0C\u6BCF\u4EA7\u751F\u4E00\u6B21 GC \u5185\u5B58\u90FD\u80FD\u6709\u6548\u7684\u56DE\u6536\uFF0C\u6240\u4EE5\u8FD9\u6837\u5E76\u6CA1\u6709\u590D\u73B0\u95EE\u9898\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/oom-4cf05af0-924f-406b-a8a4-5aa885e38cea.jpg" alt=""></p><p>\u6CA1\u6CD5\u590D\u73B0\u95EE\u9898\u5C31\u5F88\u96BE\u5B9A\u4F4D\u4E86\u3002\u4E8E\u662F\u6211\u4EEC review \u4EE3\u7801\uFF0C\u53D1\u73B0\u751F\u4EA7\u7684\u903B\u8F91\u548C\u6211\u4EEC\u7528 while \u5FAA\u73AF Mock \u6570\u636E\u8FD8\u4E0D\u592A\u4E00\u6837\u3002</p><p>\u67E5\u770B\u751F\u4EA7\u7684\u65E5\u5FD7\u53D1\u73B0\u6BCF\u6B21\u4ECE Kafka \u4E2D\u53D6\u51FA\u7684\u90FD\u662F\u51E0\u767E\u6761\u6570\u636E\uFF0C\u800C\u6211\u4EEC Mock \u65F6\u6BCF\u6B21\u53EA\u80FD\u4EA7\u751F<strong>\u4E00\u6761</strong>\u3002</p><p>\u4E3A\u4E86\u5C3D\u53EF\u80FD\u7684\u6A21\u62DF\u751F\u4EA7\u60C5\u51B5\u4FBF\u5728\u670D\u52A1\u5668\u4E0A\u8DD1\u7740\u4E00\u4E2A\u751F\u4EA7\u8005\u7A0B\u5E8F\uFF0C\u4E00\u76F4\u6E90\u6E90\u4E0D\u65AD\u7684\u5411 Kafka \u4E2D\u53D1\u9001\u6570\u636E\u3002</p><p>\u679C\u7136\u4E0D\u51FA\u610F\u5916\u53EA\u8DD1\u4E86\u4E00\u5206\u591A\u949F\u5185\u5B58\u5C31\u9876\u4E0D\u4F4F\u4E86\uFF0C\u89C2\u5BDF\u5DE6\u56FE\u53D1\u73B0 GC \u7684\u9891\u6B21\u975E\u5E38\u9AD8\uFF0C\u4F46\u662F\u5185\u5B58\u7684\u56DE\u6536\u5374\u662F\u76F8\u5F62\u89C1\u62D9\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/oom-a6d6c9cd-e79c-4a76-ba97-032cfefefd5f.jpg" alt=""></p><p>\u540C\u65F6\u540E\u53F0\u4E5F\u5F00\u59CB\u6253\u5370\u5185\u5B58\u6EA2\u51FA\u4E86\uFF0C\u8FD9\u6837\u4FBF\u590D\u73B0\u51FA\u95EE\u9898\u3002</p><h2 id="\u89E3\u51B3" tabindex="-1"><a class="header-anchor" href="#\u89E3\u51B3" aria-hidden="true">#</a> \u89E3\u51B3</h2><p>\u4ECE\u76EE\u524D\u7684\u8868\u73B0\u6765\u770B\u5C31\u662F\u5185\u5B58\u4E2D\u6709\u8BB8\u591A\u5BF9\u8C61\u4E00\u76F4\u5B58\u5728\u5F3A\u5F15\u7528\u5173\u7CFB\u5BFC\u81F4\u5F97\u4E0D\u5230\u56DE\u6536\u3002</p><p>\u4E8E\u662F\u4FBF\u60F3\u770B\u770B\u5230\u5E95\u662F\u4EC0\u4E48\u5BF9\u8C61\u5360\u7528\u4E86\u8FD9\u4E48\u591A\u7684\u5185\u5B58\uFF0C\u5229\u7528 VisualVM \u7684 HeapDump \u529F\u80FD\u53EF\u4EE5\u7ACB\u5373 dump \u51FA\u5F53\u524D\u5E94\u7528\u7684\u5185\u5B58\u60C5\u51B5\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/oom-49b47ca3-b3e2-49f7-85c9-23f7a3ef6f93.jpg" alt=""></p><p>\u7ED3\u679C\u53D1\u73B0 <code>com.lmax.disruptor.RingBuffer</code> \u7C7B\u578B\u7684\u5BF9\u8C61\u5360\u7528\u4E86\u5C06\u8FD1 50% \u7684\u5185\u5B58\u3002</p><p>\u770B\u5230\u8FD9\u4E2A\u5305\u81EA\u7136\u5C31\u60F3\u5230\u4E86 <code>Disruptor</code> \u73AF\u5F62\u961F\u5217\u3002</p><p>\u518D\u6B21 review \u4EE3\u7801\u53D1\u73B0\uFF1A\u4ECE Kafka \u91CC\u53D6\u51FA\u7684 700 \u6761\u6570\u636E\u662F\u76F4\u63A5\u5F80 Disruptor \u91CC\u4E22\u7684\u3002</p><p>\u8FD9\u91CC\u4E5F\u5C31\u80FD\u8BF4\u660E\u4E3A\u4EC0\u4E48\u7B2C\u4E00\u6B21\u6A21\u62DF\u6570\u636E\u6CA1\u590D\u73B0\u95EE\u9898\u4E86\u3002</p><p>\u6A21\u62DF\u7684\u65F6\u5019\u662F\u4E00\u4E2A\u5BF9\u8C61\u653E\u8FDB\u961F\u5217\u91CC\uFF0C\u800C\u751F\u4EA7\u7684\u60C5\u51B5\u662F 700 \u6761\u6570\u636E\u653E\u8FDB\u961F\u5217\u91CC\u3002\u8FD9\u4E2A\u6570\u636E\u91CF\u662F 700 \u500D\u7684\u5DEE\u8DDD\u3002</p><p>\u800C Disruptor \u4F5C\u4E3A\u4E00\u4E2A\u73AF\u5F62\u961F\u5217\uFF0C\u518D\u5BF9\u8C61\u6CA1\u6709\u88AB\u8986\u76D6\u4E4B\u524D\u662F\u4E00\u76F4\u5B58\u5728\u7684\u3002</p><p>\u6211\u4E5F\u505A\u4E86\u4E00\u4E2A\u5B9E\u9A8C\uFF0C\u8BC1\u660E\u786E\u5B9E\u5982\u6B64\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/oom-dee49da6-905a-4085-b82e-41e136d422e8.jpg" alt=""></p><p>\u6211\u8BBE\u7F6E\u961F\u5217\u5927\u5C0F\u4E3A 8 \uFF0C\u4ECE 0~9 \u5F80\u91CC\u9762\u5199 10 \u6761\u6570\u636E\uFF0C\u5F53\u5199\u5230 8 \u7684\u65F6\u5019\u5C31\u4F1A\u628A\u4E4B\u524D 0 \u7684\u4F4D\u7F6E\u8986\u76D6\u6389\uFF0C\u540E\u9762\u7684\u4EE5\u6B64\u7C7B\u63A8\uFF08\u7C7B\u4F3C\u4E8E HashMap \u7684\u53D6\u6A21\u5B9A\u4F4D\uFF09\u3002</p><p>\u6240\u4EE5\u5728\u751F\u4EA7\u4E0A\u5047\u8BBE\u6211\u4EEC\u7684\u961F\u5217\u5927\u5C0F\u662F 1024\uFF0C\u90A3\u4E48\u968F\u7740\u7CFB\u7EDF\u7684\u8FD0\u884C\u6700\u7EC8\u80AF\u5B9A\u4F1A\u5BFC\u81F4 1024 \u4E2A\u4F4D\u7F6E\u4E0A\u88C5\u6EE1\u4E86\u5BF9\u8C61\uFF0C\u800C\u4E14\u6BCF\u4E2A\u4F4D\u7F6E\u662F 700 \u4E2A\uFF01</p><p>\u4E8E\u662F\u67E5\u770B\u4E86\u751F\u4EA7\u4E0A Disruptor \u7684 RingBuffer \u914D\u7F6E\uFF0C\u7ED3\u679C\u662F\uFF1A<code>1024*1024</code>\u3002</p><p>\u8FD9\u4E2A\u6570\u91CF\u7EA7\u5C31\u975E\u5E38\u5413\u4EBA\u4E86\u3002</p><p>\u4E3A\u4E86\u9A8C\u8BC1\u662F\u5426\u662F\u8FD9\u4E2A\u95EE\u9898\uFF0C\u6211\u5728\u672C\u5730\u5C06\u8BE5\u503C\u6362\u4E3A 2 \uFF0C\u4E00\u4E2A\u6700\u5C0F\u503C\u8BD5\u8BD5\u3002</p><p>\u540C\u6837\u7684 128M \u5185\u5B58\uFF0C\u4E5F\u662F\u901A\u8FC7 Kafka \u4E00\u76F4\u6E90\u6E90\u4E0D\u65AD\u7684\u53D6\u51FA\u6570\u636E\u3002\u901A\u8FC7\u76D1\u63A7\u5982\u4E0B\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/oom-5529781f-1f68-47a7-a3d2-04eba9e9d52e.jpg" alt=""></p><p>\u8DD1\u4E86 20 \u51E0\u5206\u949F\u7CFB\u7EDF\u4E00\u5207\u6B63\u5E38\uFF0C\u6BCF\u5F53\u4E00\u6B21 GC \u90FD\u80FD\u56DE\u6536\u5927\u90E8\u5206\u5185\u5B58\uFF0C\u6700\u7EC8\u5448\u73B0\u952F\u9F7F\u72B6\u3002</p><p>\u8FD9\u6837\u95EE\u9898\u5C31\u627E\u5230\u4E86\uFF0C\u4E0D\u8FC7\u751F\u4EA7\u4E0A\u8FD9\u4E2A\u503C\u5177\u4F53\u8BBE\u7F6E\u591A\u5C11\u8FD8\u5F97\u6839\u636E\u4E1A\u52A1\u60C5\u51B5\u6D4B\u8BD5\u624D\u80FD\u77E5\u9053\uFF0C\u4F46\u539F\u6709\u7684 1024*1024 \u662F\u7EDD\u5BF9\u4E0D\u80FD\u518D\u4F7F\u7528\u4E86\u3002</p><h2 id="\u603B\u7ED3" tabindex="-1"><a class="header-anchor" href="#\u603B\u7ED3" aria-hidden="true">#</a> \u603B\u7ED3</h2><p>\u867D\u7136\u5230\u4E86\u6700\u540E\u4E5F\u5C31\u6539\u4E86\u4E00\u884C\u4EE3\u7801(\u8FD8\u6CA1\u6539\uFF0C\u76F4\u63A5\u4FEE\u6539\u914D\u7F6E)\uFF0C\u4F46\u8FD9\u6392\u67E5\u8FC7\u7A0B\u6211\u89C9\u5F97\u662F\u6709\u610F\u4E49\u7684\u3002</p><p>\u4E5F\u4F1A\u8BA9\u5927\u90E8\u5206\u89C9\u5F97 JVM \u8FD9\u6837\u7684\u9ED1\u76D2\u96BE\u4EE5\u4E0B\u624B\u7684\u540C\u5B66\u6709\u4E00\u4E2A\u76F4\u89C2\u7684\u611F\u53D7\u3002</p><p><code>\u540C\u65F6\u4E5F\u5F97\u611F\u53F9 Disruptor \u4E1C\u897F\u867D\u597D\uFF0C\u4E5F\u4E0D\u80FD\u4E71\u7528\u54E6\uFF01</code></p><p>\u76F8\u5173\u6F14\u793A\u4EE3\u7801\u67E5\u770B\uFF1A</p>',59),h={href:"https://github.com/crossoverJie/JCSprout/tree/master/src/main/java/com/crossoverjie/disruptor",target:"_blank",rel:"noopener noreferrer"},m=d("https://github.com/crossoverJie/JCSprout/tree/master/src/main/java/com/crossoverjie/disruptor"),b=e("p",null,[e("strong",null,"\u4F60\u7684\u70B9\u8D5E\u4E0E\u8F6C\u53D1\u662F\u6700\u5927\u7684\u652F\u6301\u3002")],-1),f=e("p",null,"\u539F\u6587\u94FE\u63A5\uFF1Ahttps://crossoverjie.top/2018/08/29/java-senior/OOM-Disruptor/",-1),l=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png",alt:""})],-1);function u(g,j){const a=r("ExternalLinkIcon");return p(),o("div",null,[n,e("p",null,[e("a",h,[m,c(a)])]),b,f,l])}var k=t(i,[["render",u],["__file","oom.html.vue"]]);export{k as default};
diff --git a/dist/assets/operator.html.783e87f0.js b/dist/assets/operator.html.152cf4bc.js
similarity index 99%
rename from dist/assets/operator.html.783e87f0.js
rename to dist/assets/operator.html.152cf4bc.js
index 23fbe19d..e8bffa81 100644
--- a/dist/assets/operator.html.783e87f0.js
+++ b/dist/assets/operator.html.152cf4bc.js
@@ -1,4 +1,4 @@
-import{_ as t}from"./plugin-vue_export-helper.21dcd24c.js";import{r as e,o,c,a as s,b as l,e as a,d as n}from"./app.a0271b9c.js";const i={},u=a(`<h1 id="java\u8FD0\u7B97\u7B26" tabindex="-1"><a class="header-anchor" href="#java\u8FD0\u7B97\u7B26" aria-hidden="true">#</a> Java\u8FD0\u7B97\u7B26</h1><p>\u201C\u4E8C\u54E5\uFF0C\u8BA9\u6211\u76F2\u731C\u4E00\u4E0B\u54C8\uFF0C\u8FD0\u7B97\u7B26\u662F\u4E0D\u662F\u6307\u7684\u5C31\u662F\u52A0\u51CF\u4E58\u9664\u554A\uFF1F\u201D\u4E09\u59B9\u7684\u8138\u4E0A\u6CDB\u7740\u751C\u751C\u7684\u7B11\u5BB9\uFF0C\u6211\u60F3\u5979\u4E00\u5B9A\u5BF9\u63D0\u51FA\u7684\u95EE\u9898\u5F88\u6709\u81EA\u4FE1\u3002</p><p>\u201C\u662F\u7684\uFF0C\u4E09\u59B9\u3002\u8FD0\u7B97\u7B26\u5728 Java \u4E2D\u5360\u636E\u7740\u91CD\u8981\u7684\u4F4D\u7F6E\uFF0C\u5BF9\u7A0B\u5E8F\u7684\u6267\u884C\u6709\u7740\u5F88\u5927\u7684\u5E2E\u52A9\u3002\u9664\u4E86\u5E38\u89C1\u7684\u52A0\u51CF\u4E58\u9664\uFF0C\u8FD8\u6709\u8BB8\u591A\u5176\u4ED6\u7C7B\u578B\u7684\u8FD0\u7B97\u7B26\uFF0C\u6765\u770B\u4E0B\u9762\u8FD9\u5F20\u601D\u7EF4\u5BFC\u56FE\u3002\u201D</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/core-grammar/eleven-01.png" alt=""></p><h3 id="_01\u3001\u7B97\u6570\u8FD0\u7B97\u7B26" tabindex="-1"><a class="header-anchor" href="#_01\u3001\u7B97\u6570\u8FD0\u7B97\u7B26" aria-hidden="true">#</a> 01\u3001\u7B97\u6570\u8FD0\u7B97\u7B26</h3><p>\u7B97\u672F\u8FD0\u7B97\u7B26\u9664\u4E86\u6700\u5E38\u89C1\u7684\u52A0\u51CF\u4E58\u9664\uFF0C\u8FD8\u6709\u4E00\u4E2A\u53D6\u4F59\u7684\u8FD0\u7B97\u7B26\uFF0C\u7528\u4E8E\u5F97\u5230\u9664\u6CD5\u8FD0\u7B97\u540E\u7684\u4F59\u6570\uFF0C\u6765\u4E32\u4EE3\u7801\u611F\u53D7\u4E0B\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token doc-comment comment">/**
+import{_ as t}from"./plugin-vue_export-helper.21dcd24c.js";import{r as e,o,c,a as s,b as l,e as a,d as n}from"./app.615e41d8.js";const i={},u=a(`<h1 id="java\u8FD0\u7B97\u7B26" tabindex="-1"><a class="header-anchor" href="#java\u8FD0\u7B97\u7B26" aria-hidden="true">#</a> Java\u8FD0\u7B97\u7B26</h1><p>\u201C\u4E8C\u54E5\uFF0C\u8BA9\u6211\u76F2\u731C\u4E00\u4E0B\u54C8\uFF0C\u8FD0\u7B97\u7B26\u662F\u4E0D\u662F\u6307\u7684\u5C31\u662F\u52A0\u51CF\u4E58\u9664\u554A\uFF1F\u201D\u4E09\u59B9\u7684\u8138\u4E0A\u6CDB\u7740\u751C\u751C\u7684\u7B11\u5BB9\uFF0C\u6211\u60F3\u5979\u4E00\u5B9A\u5BF9\u63D0\u51FA\u7684\u95EE\u9898\u5F88\u6709\u81EA\u4FE1\u3002</p><p>\u201C\u662F\u7684\uFF0C\u4E09\u59B9\u3002\u8FD0\u7B97\u7B26\u5728 Java \u4E2D\u5360\u636E\u7740\u91CD\u8981\u7684\u4F4D\u7F6E\uFF0C\u5BF9\u7A0B\u5E8F\u7684\u6267\u884C\u6709\u7740\u5F88\u5927\u7684\u5E2E\u52A9\u3002\u9664\u4E86\u5E38\u89C1\u7684\u52A0\u51CF\u4E58\u9664\uFF0C\u8FD8\u6709\u8BB8\u591A\u5176\u4ED6\u7C7B\u578B\u7684\u8FD0\u7B97\u7B26\uFF0C\u6765\u770B\u4E0B\u9762\u8FD9\u5F20\u601D\u7EF4\u5BFC\u56FE\u3002\u201D</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/core-grammar/eleven-01.png" alt=""></p><h3 id="_01\u3001\u7B97\u6570\u8FD0\u7B97\u7B26" tabindex="-1"><a class="header-anchor" href="#_01\u3001\u7B97\u6570\u8FD0\u7B97\u7B26" aria-hidden="true">#</a> 01\u3001\u7B97\u6570\u8FD0\u7B97\u7B26</h3><p>\u7B97\u672F\u8FD0\u7B97\u7B26\u9664\u4E86\u6700\u5E38\u89C1\u7684\u52A0\u51CF\u4E58\u9664\uFF0C\u8FD8\u6709\u4E00\u4E2A\u53D6\u4F59\u7684\u8FD0\u7B97\u7B26\uFF0C\u7528\u4E8E\u5F97\u5230\u9664\u6CD5\u8FD0\u7B97\u540E\u7684\u4F59\u6570\uFF0C\u6765\u4E32\u4EE3\u7801\u611F\u53D7\u4E0B\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token doc-comment comment">/**
  * \u5FAE\u4FE1\u641C\u7D22\u300C\u6C89\u9ED8\u738B\u4E8C\u300D\uFF0C\u56DE\u590D Java
  */</span>
 <span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">ArithmeticOperator</span> <span class="token punctuation">{</span>
diff --git a/dist/assets/optional.html.d38ec385.js b/dist/assets/optional.html.775157f3.js
similarity index 99%
rename from dist/assets/optional.html.d38ec385.js
rename to dist/assets/optional.html.775157f3.js
index 892fed8e..b31167f7 100644
--- a/dist/assets/optional.html.d38ec385.js
+++ b/dist/assets/optional.html.775157f3.js
@@ -1,4 +1,4 @@
-import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e as t}from"./app.a0271b9c.js";const p={},e=t(`<h1 id="java-8-optional\u6700\u4F73\u6307\u5357" tabindex="-1"><a class="header-anchor" href="#java-8-optional\u6700\u4F73\u6307\u5357" aria-hidden="true">#</a> Java 8 Optional\u6700\u4F73\u6307\u5357</h1><p>\u60F3\u5B66\u4E60\uFF0C\u6C38\u8FDC\u90FD\u4E0D\u665A\uFF0C\u5C24\u5176\u662F\u9488\u5BF9 Java 8 \u91CC\u9762\u7684\u597D\u4E1C\u897F\uFF0COptional \u5C31\u662F\u5176\u4E2D\u4E4B\u4E00\uFF0C\u8BE5\u7C7B\u63D0\u4F9B\u4E86\u4E00\u79CD\u7528\u4E8E\u8868\u793A\u53EF\u9009\u503C\u800C\u975E\u7A7A\u5F15\u7528\u7684\u7C7B\u7EA7\u522B\u89E3\u51B3\u65B9\u6848\u3002\u4F5C\u4E3A\u4E00\u540D Java \u7A0B\u5E8F\u5458\uFF0C\u6211\u771F\u7684\u662F\u70E6\u900F\u4E86 NullPointerException\uFF08NPE\uFF09\uFF0C\u5C3D\u7BA1\u548C\u5B83\u719F\u5F97\u5C31\u50CF\u4E00\u4F4D\u8001\u670B\u53CB\uFF0C\u77E5\u9053\u5B83\u4E5F\u662F\u8FEB\u4E0D\u5F97\u5DF2\u2014\u2014\u7A0B\u5E8F\u6B63\u5728\u4F7F\u7528\u4E00\u4E2A\u5BF9\u8C61\u5374\u53D1\u73B0\u8FD9\u4E2A\u5BF9\u8C61\u7684\u503C\u4E3A null\uFF0C\u4E8E\u662F Java \u865A\u62DF\u673A\u5C31\u6012\u53D1\u51B2\u51A0\u5730\u628A\u5B83\u629B\u4E86\u51FA\u6765\u5F53\u505A\u66FF\u7F6A\u7F8A\u3002</p><p>\u5F53\u7136\u4E86\uFF0C\u6211\u4EEC\u7A0B\u5E8F\u5458\u662F\u5BCC\u6709\u8D23\u4EFB\u5FC3\u7684\uFF0C\u4E0D\u4F1A\u5750\u89C6\u4E0D\u7BA1\uFF0C\u4E8E\u662F\u5C31\u6709\u4E86\u5927\u91CF\u7684 null \u503C\u68C0\u67E5\u3002\u5C3D\u7BA1\u6709\u65F6\u5019\u8FD9\u79CD\u68C0\u67E5\u5B8C\u5168\u6CA1\u6709\u5FC5\u8981\uFF0C\u4F46\u6211\u4EEC\u5DF2\u7ECF\u4E60\u60EF\u4E86\u4F8B\u884C\u516C\u4E8B\u3002\u7EC8\u4E8E\uFF0CJava 8 \u770B\u4E0D\u4E0B\u53BB\u4E86\uFF0C\u5C31\u5F15\u5165\u4E86 Optional\uFF0C\u4EE5\u4FBF\u6211\u4EEC\u7F16\u5199\u7684\u4EE3\u7801\u4E0D\u518D\u90A3\u4E48\u523B\u8584\u5446\u677F\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/java8/optional-1.jpg" alt=""></p><h3 id="_01\u3001\u6CA1\u6709-optional-\u4F1A\u6709\u4EC0\u4E48\u95EE\u9898" tabindex="-1"><a class="header-anchor" href="#_01\u3001\u6CA1\u6709-optional-\u4F1A\u6709\u4EC0\u4E48\u95EE\u9898" aria-hidden="true">#</a> 01\u3001\u6CA1\u6709 Optional \u4F1A\u6709\u4EC0\u4E48\u95EE\u9898</h3><p>\u6211\u4EEC\u6765\u6A21\u62DF\u4E00\u4E2A\u5B9E\u9645\u7684\u5E94\u7528\u573A\u666F\u3002\u5C0F\u738B\u7B2C\u4E00\u5929\u4E0A\u73ED\uFF0C\u9886\u5BFC\u8001\u9A6C\u5C31\u7ED9\u4ED6\u5B89\u6392\u4E86\u4E00\u4E2A\u4EFB\u52A1\uFF0C\u8981\u4ED6\u4ECE\u6570\u636E\u5E93\u4E2D\u6839\u636E\u4F1A\u5458 ID \u62C9\u53D6\u4E00\u4E2A\u4F1A\u5458\u7684\u59D3\u540D\uFF0C\u7136\u540E\u5C06\u59D3\u540D\u6253\u5370\u5230\u63A7\u5236\u53F0\u3002\u867D\u7136\u662F\u65B0\u6765\u7684\uFF0C\u4F46\u8FD9\u4E2A\u4EFB\u52A1\u96BE\u4E0D\u5012\u5C0F\u738B\uFF0C\u4E8E\u662F\u4ED6\u82B1\u4E86 10 \u5206\u949F\u5199\u4E0B\u4E86\u8FD9\u6BB5\u4EE3\u7801\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">WithoutOptionalDemo</span> <span class="token punctuation">{</span>
+import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e as t}from"./app.615e41d8.js";const p={},e=t(`<h1 id="java-8-optional\u6700\u4F73\u6307\u5357" tabindex="-1"><a class="header-anchor" href="#java-8-optional\u6700\u4F73\u6307\u5357" aria-hidden="true">#</a> Java 8 Optional\u6700\u4F73\u6307\u5357</h1><p>\u60F3\u5B66\u4E60\uFF0C\u6C38\u8FDC\u90FD\u4E0D\u665A\uFF0C\u5C24\u5176\u662F\u9488\u5BF9 Java 8 \u91CC\u9762\u7684\u597D\u4E1C\u897F\uFF0COptional \u5C31\u662F\u5176\u4E2D\u4E4B\u4E00\uFF0C\u8BE5\u7C7B\u63D0\u4F9B\u4E86\u4E00\u79CD\u7528\u4E8E\u8868\u793A\u53EF\u9009\u503C\u800C\u975E\u7A7A\u5F15\u7528\u7684\u7C7B\u7EA7\u522B\u89E3\u51B3\u65B9\u6848\u3002\u4F5C\u4E3A\u4E00\u540D Java \u7A0B\u5E8F\u5458\uFF0C\u6211\u771F\u7684\u662F\u70E6\u900F\u4E86 NullPointerException\uFF08NPE\uFF09\uFF0C\u5C3D\u7BA1\u548C\u5B83\u719F\u5F97\u5C31\u50CF\u4E00\u4F4D\u8001\u670B\u53CB\uFF0C\u77E5\u9053\u5B83\u4E5F\u662F\u8FEB\u4E0D\u5F97\u5DF2\u2014\u2014\u7A0B\u5E8F\u6B63\u5728\u4F7F\u7528\u4E00\u4E2A\u5BF9\u8C61\u5374\u53D1\u73B0\u8FD9\u4E2A\u5BF9\u8C61\u7684\u503C\u4E3A null\uFF0C\u4E8E\u662F Java \u865A\u62DF\u673A\u5C31\u6012\u53D1\u51B2\u51A0\u5730\u628A\u5B83\u629B\u4E86\u51FA\u6765\u5F53\u505A\u66FF\u7F6A\u7F8A\u3002</p><p>\u5F53\u7136\u4E86\uFF0C\u6211\u4EEC\u7A0B\u5E8F\u5458\u662F\u5BCC\u6709\u8D23\u4EFB\u5FC3\u7684\uFF0C\u4E0D\u4F1A\u5750\u89C6\u4E0D\u7BA1\uFF0C\u4E8E\u662F\u5C31\u6709\u4E86\u5927\u91CF\u7684 null \u503C\u68C0\u67E5\u3002\u5C3D\u7BA1\u6709\u65F6\u5019\u8FD9\u79CD\u68C0\u67E5\u5B8C\u5168\u6CA1\u6709\u5FC5\u8981\uFF0C\u4F46\u6211\u4EEC\u5DF2\u7ECF\u4E60\u60EF\u4E86\u4F8B\u884C\u516C\u4E8B\u3002\u7EC8\u4E8E\uFF0CJava 8 \u770B\u4E0D\u4E0B\u53BB\u4E86\uFF0C\u5C31\u5F15\u5165\u4E86 Optional\uFF0C\u4EE5\u4FBF\u6211\u4EEC\u7F16\u5199\u7684\u4EE3\u7801\u4E0D\u518D\u90A3\u4E48\u523B\u8584\u5446\u677F\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/java8/optional-1.jpg" alt=""></p><h3 id="_01\u3001\u6CA1\u6709-optional-\u4F1A\u6709\u4EC0\u4E48\u95EE\u9898" tabindex="-1"><a class="header-anchor" href="#_01\u3001\u6CA1\u6709-optional-\u4F1A\u6709\u4EC0\u4E48\u95EE\u9898" aria-hidden="true">#</a> 01\u3001\u6CA1\u6709 Optional \u4F1A\u6709\u4EC0\u4E48\u95EE\u9898</h3><p>\u6211\u4EEC\u6765\u6A21\u62DF\u4E00\u4E2A\u5B9E\u9645\u7684\u5E94\u7528\u573A\u666F\u3002\u5C0F\u738B\u7B2C\u4E00\u5929\u4E0A\u73ED\uFF0C\u9886\u5BFC\u8001\u9A6C\u5C31\u7ED9\u4ED6\u5B89\u6392\u4E86\u4E00\u4E2A\u4EFB\u52A1\uFF0C\u8981\u4ED6\u4ECE\u6570\u636E\u5E93\u4E2D\u6839\u636E\u4F1A\u5458 ID \u62C9\u53D6\u4E00\u4E2A\u4F1A\u5458\u7684\u59D3\u540D\uFF0C\u7136\u540E\u5C06\u59D3\u540D\u6253\u5370\u5230\u63A7\u5236\u53F0\u3002\u867D\u7136\u662F\u65B0\u6765\u7684\uFF0C\u4F46\u8FD9\u4E2A\u4EFB\u52A1\u96BE\u4E0D\u5012\u5C0F\u738B\uFF0C\u4E8E\u662F\u4ED6\u82B1\u4E86 10 \u5206\u949F\u5199\u4E0B\u4E86\u8FD9\u6BB5\u4EE3\u7801\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">WithoutOptionalDemo</span> <span class="token punctuation">{</span>
     <span class="token keyword">class</span> <span class="token class-name">Member</span> <span class="token punctuation">{</span>
         <span class="token keyword">private</span> <span class="token class-name">String</span> name<span class="token punctuation">;</span>
 
diff --git a/dist/assets/os.html.e10e307f.js b/dist/assets/os.html.1d208877.js
similarity index 99%
rename from dist/assets/os.html.e10e307f.js
rename to dist/assets/os.html.1d208877.js
index a37b2f73..02bb674b 100644
--- a/dist/assets/os.html.e10e307f.js
+++ b/dist/assets/os.html.1d208877.js
@@ -1,4 +1,4 @@
-import{_ as a}from"./plugin-vue_export-helper.21dcd24c.js";import{r as o,o as i,c as n,a as p,b as r,d as e,e as s}from"./app.a0271b9c.js";const l={},d=e("\u4F5C\u8005\uFF1A\u6708\u4F34\u98DE\u9C7C\uFF0C\u8F6C\u8F7D\u94FE\u63A5\uFF1A"),c={href:"https://mp.weixin.qq.com/s/G9ZqwEMxjrG5LbgYwM5ACQ",target:"_blank",rel:"noopener noreferrer"},g=e("https://mp.weixin.qq.com/s/G9ZqwEMxjrG5LbgYwM5ACQ"),b=s(`<p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/os-5ad16ae7-059f-44f1-8236-697b203bb72e.png" alt=""></p><h2 id="\u8BA1\u7B97\u673A\u7ED3\u6784" tabindex="-1"><a class="header-anchor" href="#\u8BA1\u7B97\u673A\u7ED3\u6784" aria-hidden="true">#</a> \u8BA1\u7B97\u673A\u7ED3\u6784</h2><p>\u73B0\u4EE3\u8BA1\u7B97\u673A\u6A21\u578B\u662F\u57FA\u4E8E-<strong>\u51AF\u8BFA\u4F9D\u66FC\u8BA1\u7B97\u673A\u6A21\u578B</strong></p><p>\u8BA1\u7B97\u673A\u5728\u8FD0\u884C\u65F6\uFF0C\u5148\u4ECE\u5185\u5B58\u4E2D\u53D6\u51FA\u7B2C\u4E00\u6761\u6307\u4EE4\uFF0C\u901A\u8FC7\u63A7\u5236\u5668\u7684\u8BD1\u7801\uFF0C\u6309\u6307\u4EE4\u7684\u8981\u6C42\uFF0C\u4ECE\u5B58\u50A8\u5668\u4E2D\u53D6\u51FA\u6570\u636E\u8FDB\u884C\u6307\u5B9A\u7684\u8FD0\u7B97\u548C\u903B\u8F91\u64CD\u4F5C\u7B49\u52A0\u5DE5\uFF0C\u7136\u540E\u518D\u6309\u5730\u5740\u628A\u7ED3\u679C\u9001\u5230\u5185\u5B58\u4E2D\u53BB\uFF0C\u63A5\u4E0B\u6765\uFF0C\u518D\u53D6\u51FA\u7B2C\u4E8C\u6761\u6307\u4EE4\uFF0C\u5728\u63A7\u5236\u5668\u7684\u6307\u6325\u4E0B\u5B8C\u6210\u89C4\u5B9A\u64CD\u4F5C\uFF0C\u4F9D\u6B64\u8FDB\u884C\u4E0B\u53BB\u3002\u76F4\u81F3\u9047\u5230\u505C\u6B62\u6307\u4EE4</p><p>\u7A0B\u5E8F\u4E0E\u6570\u636E\u4E00\u6837\u5B58\u8D2E\uFF0C\u6309\u7A0B\u5E8F\u7F16\u6392\u7684\u987A\u5E8F\uFF0C\u4E00\u6B65\u4E00\u6B65\u5730\u53D6\u51FA\u6307\u4EE4\uFF0C\u81EA\u52A8\u5730\u5B8C\u6210\u6307\u4EE4\u89C4\u5B9A\u7684\u64CD\u4F5C\u662F\u8BA1\u7B97\u673A\u6700\u57FA\u672C\u7684\u5DE5\u4F5C\u6A21\u578B</p><p><strong>\u8BA1\u7B97\u673A\u4E94\u5927\u6838\u5FC3\u7EC4\u6210\u90E8\u5206</strong></p><p>\u63A7\u5236\u5668\uFF1A\u662F\u6574\u4E2A\u8BA1\u7B97\u673A\u7684\u4E2D\u67A2\u795E\u7ECF\uFF0C\u5176\u529F\u80FD\u662F\u5BF9\u7A0B\u5E8F\u89C4\u5B9A\u7684\u63A7\u5236\u4FE1\u606F\u8FDB\u884C\u89E3\u91CA\uFF0C\u6839\u636E\u5176\u8981\u6C42\u8FDB\u884C\u63A7\u5236\uFF0C\u8C03\u5EA6\u7A0B\u5E8F\u3001\u6570\u636E\u3001\u5730\u5740\uFF0C\u534F\u8C03\u8BA1\u7B97\u673A\u5404\u90E8\u5206\u5DE5\u4F5C\u53CA\u5185\u5B58\u4E0E\u5916\u8BBE\u7684\u8BBF\u95EE\u7B49\u3002</p><p>\u8FD0\u7B97\u5668\uFF1A\u8FD0\u7B97\u5668\u7684\u529F\u80FD\u662F\u5BF9\u6570\u636E\u8FDB\u884C\u5404\u79CD\u7B97\u672F\u8FD0\u7B97\u548C\u903B\u8F91\u8FD0\u7B97\uFF0C\u5373\u5BF9\u6570\u636E\u8FDB\u884C\u52A0\u5DE5\u5904\u7406\u3002</p><p>\u5B58\u50A8\u5668\uFF1A\u5B58\u50A8\u5668\u7684\u529F\u80FD\u662F\u5B58\u50A8\u7A0B\u5E8F\u3001\u6570\u636E\u548C\u5404\u79CD\u4FE1\u53F7\u3001\u547D\u4EE4\u7B49\u4FE1\u606F\uFF0C\u5E76\u5728\u9700\u8981\u65F6\u63D0\u4F9B\u8FD9\u4E9B\u4FE1\u606F\u3002</p><p>\u8F93\u5165\uFF1A\u8F93\u5165\u8BBE\u5907\u662F\u8BA1\u7B97\u673A\u7684\u91CD\u8981\u7EC4\u6210\u90E8\u5206\uFF0C\u8F93\u5165\u8BBE\u5907\u4E0E\u8F93\u51FA\u8BBE\u5907\u5408\u4F60\u4E3A\u5916\u90E8\u8BBE\u5907\uFF0C\u7B80\u79F0\u5916\u8BBE\uFF0C\u8F93\u5165\u8BBE\u5907\u7684\u4F5C\u7528\u662F\u5C06\u7A0B\u5E8F\u3001\u539F\u59CB\u6570\u636E\u3001\u6587\u5B57\u3001\u5B57\u7B26\u3001\u63A7\u5236\u547D\u4EE4\u6216\u73B0\u573A\u91C7\u96C6\u7684\u6570\u636E\u7B49\u4FE1\u606F\u8F93\u5165\u5230\u8BA1\u7B97\u673A\u3002</p><blockquote><p>\u5E38\u89C1\u7684\u8F93\u5165\u8BBE\u5907\u6709\u952E\u76D8\u3001\u9F20\u6807\u5668\u3001\u5149\u7535\u8F93\u5165\u673A\u3001\u78C1\u5E26\u673A\u3001\u78C1\u76D8\u673A\u3001\u5149\u76D8\u673A\u7B49\u3002</p></blockquote><p>\u8F93\u51FA\uFF1A\u8F93\u51FA\u8BBE\u5907\u4E0E\u8F93\u5165\u8BBE\u5907\u540C\u6837\u662F\u8BA1\u7B97\u673A\u7684\u91CD\u8981\u7EC4\u6210\u90E8\u5206\uFF0C\u5B83\u628A\u5916\u7B97\u673A\u7684\u4E2D\u95F4\u7ED3\u679C\u6216\u6700\u540E\u7ED3\u679C\u3001\u673A\u5185\u7684\u5404\u79CD\u6570\u636E\u7B26\u53F7\u53CA\u6587\u5B57\u6216\u5404\u79CD\u63A7\u5236\u4FE1\u53F7\u7B49\u4FE1\u606F\u8F93\u51FA\u51FA\u6765\uFF0C\u5FAE\u673A\u5E38\u7528\u7684\u8F93\u51FA\u8BBE\u5907\u6709\u663E\u793A\u7EC8\u7AEFCRT\u3001\u6253\u5370\u673A\u3001\u6FC0\u5149\u5370\u5B57\u673A\u3001\u7ED8\u56FE\u4EEA\u53CA\u78C1\u5E26\u3001\u5149\u76D8\u673A\u7B49\u3002</p><p><strong>\u8BA1\u7B97\u673A\u7ED3\u6784\u5206\u6210\u4EE5\u4E0B 5 \u4E2A\u90E8\u5206\uFF1A</strong></p><p>\u8F93\u5165\u8BBE\u5907\uFF1B\u8F93\u51FA\u8BBE\u5907\uFF1B\u5185\u5B58\uFF1B\u4E2D\u592E\u5904\u7406\u5668\uFF1B\u603B\u7EBF\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/os-eff4b87b-9091-443c-988b-721e9fd59d2f.png" alt=""></p><h3 id="\u5185\u5B58" tabindex="-1"><a class="header-anchor" href="#\u5185\u5B58" aria-hidden="true">#</a> \u5185\u5B58</h3><p>\u5728\u51AF\u8BFA\u4F9D\u66FC\u6A21\u578B\u4E2D\uFF0C\u7A0B\u5E8F\u548C\u6570\u636E\u88AB\u5B58\u50A8\u5728\u4E00\u4E2A\u88AB\u79F0\u4F5C\u5185\u5B58\u7684\u7EBF\u6027\u6392\u5217\u5B58\u50A8\u533A\u57DF\u3002</p><p>\u5B58\u50A8\u7684\u6570\u636E\u5355\u4F4D\u662F\u4E00\u4E2A\u4E8C\u8FDB\u5236\u4F4D\uFF0C\u82F1\u6587\u662F bit\uFF0C\u6700\u5C0F\u7684\u5B58\u50A8\u5355\u4F4D\u53EB\u4F5C\u5B57\u8282\uFF0C\u4E5F\u5C31\u662F 8 \u4F4D\uFF0C\u82F1\u6587\u662F byte\uFF0C\u6BCF\u4E00\u4E2A\u5B57\u8282\u90FD\u5BF9\u5E94\u4E00\u4E2A\u5185\u5B58\u5730\u5740\u3002</p><p>\u5185\u5B58\u5730\u5740\u7531 0 \u5F00\u59CB\u7F16\u53F7\uFF0C\u6BD4\u5982\u7B2C 1 \u4E2A\u5730\u5740\u662F 0\uFF0C\u7B2C 2 \u4E2A\u5730\u5740\u662F 1\uFF0C \u7136\u540E\u81EA\u589E\u6392\u5217\uFF0C\u6700\u540E\u4E00\u4E2A\u5730\u5740\u662F\u5185\u5B58\u4E2D\u7684\u5B57\u8282\u6570\u51CF 1\u3002</p><p>\u6211\u4EEC\u901A\u5E38\u8BF4\u7684\u5185\u5B58\u90FD\u662F\u968F\u673A\u5B58\u53D6\u5668\uFF0C\u4E5F\u5C31\u662F\u8BFB\u53D6\u4EFB\u4F55\u4E00\u4E2A\u5730\u5740\u6570\u636E\u7684\u901F\u5EA6\u662F\u4E00\u6837\u7684\uFF0C\u5199\u5165\u4EFB\u4F55\u4E00\u4E2A\u5730\u5740\u6570\u636E\u7684\u901F\u5EA6\u4E5F\u662F\u4E00\u6837\u7684\u3002</p><h3 id="cpu" tabindex="-1"><a class="header-anchor" href="#cpu" aria-hidden="true">#</a> CPU</h3><p>\u51AF\u8BFA\u4F9D\u66FC\u6A21\u578B\u4E2D CPU \u8D1F\u8D23\u63A7\u5236\u548C\u8BA1\u7B97\uFF0C\u4E3A\u4E86\u65B9\u4FBF\u8BA1\u7B97\u8F83\u5927\u7684\u6570\u503C\uFF0CCPU \u6BCF\u6B21\u53EF\u4EE5\u8BA1\u7B97\u591A\u4E2A\u5B57\u8282\u7684\u6570\u636E\u3002</p><ul><li><p>\u5982\u679C CPU \u6BCF\u6B21\u53EF\u4EE5\u8BA1\u7B97 4 \u4E2A byte\uFF0C\u90A3\u4E48\u6211\u4EEC\u79F0\u4F5C 32 \u4F4D CPU\uFF1B</p></li><li><p>\u5982\u679C CPU \u6BCF\u6B21\u53EF\u4EE5\u8BA1\u7B97 8 \u4E2A byte\uFF0C\u90A3\u4E48\u6211\u4EEC\u79F0\u4F5C 64 \u4F4D CPU\u3002</p></li></ul><p>\u8FD9\u91CC\u7684 32 \u548C 64\uFF0C\u79F0\u4F5C CPU \u7684\u4F4D\u5BBD\u3002</p><p><strong>\u4E3A\u4EC0\u4E48 CPU \u8981\u8FD9\u6837\u8BBE\u8BA1\u5462\uFF1F</strong></p><p>\u56E0\u4E3A\u4E00\u4E2A byte \u6700\u5927\u7684\u8868\u793A\u8303\u56F4\u5C31\u662F 0~255\u3002</p><p>\u6BD4\u5982\u8981\u8BA1\u7B97 <code>20000*50</code>\uFF0C\u5C31\u8D85\u51FA\u4E86byte \u6700\u5927\u7684\u8868\u793A\u8303\u56F4\u4E86\u3002</p><p>\u56E0\u6B64\uFF0CCPU \u9700\u8981\u652F\u6301\u591A\u4E2A byte \u4E00\u8D77\u8BA1\u7B97\uFF0C\u5F53\u7136\uFF0CCPU \u4F4D\u6570\u8D8A\u5927\uFF0C\u53EF\u4EE5\u8BA1\u7B97\u7684\u6570\u503C\u5C31\u8D8A\u5927\uFF0C\u4F46\u662F\u5728\u73B0\u5B9E\u751F\u6D3B\u4E2D\u4E0D\u4E00\u5B9A\u9700\u8981\u8BA1\u7B97\u8FD9\u4E48\u5927\u7684\u6570\u503C\uFF0C\u6BD4\u5982\u8BF4 32 \u4F4D CPU \u80FD\u8BA1\u7B97\u7684\u6700\u5927\u6574\u6570\u662F 4294967295\uFF0C\u8FD9\u5DF2\u7ECF\u975E\u5E38\u5927\u4E86\u3002</p><p><strong>\u63A7\u5236\u5355\u5143\u548C\u903B\u8F91\u8FD0\u7B97\u5355\u5143</strong></p><p>CPU \u4E2D\u6709\u4E00\u4E2A\u63A7\u5236\u5355\u5143\u4E13\u95E8\u8D1F\u8D23\u63A7\u5236 CPU \u5DE5\u4F5C\uFF1B\u8FD8\u6709\u903B\u8F91\u8FD0\u7B97\u5355\u5143\u4E13\u95E8\u8D1F\u8D23\u8BA1\u7B97\u3002</p><p><strong>\u5BC4\u5B58\u5668</strong></p><p>CPU \u8981\u8FDB\u884C\u8BA1\u7B97\uFF0C\u6BD4\u5982\u6700\u7B80\u5355\u7684\u52A0\u548C\u4E24\u4E2A\u6570\u5B57\u65F6\uFF0C\u56E0\u4E3A CPU \u79BB\u5185\u5B58\u592A\u8FDC\uFF0C\u6240\u4EE5\u9700\u8981\u4E00\u79CD\u79BB\u81EA\u5DF1\u8FD1\u7684\u5B58\u50A8\u6765\u5B58\u50A8\u5C06\u8981\u88AB\u8BA1\u7B97\u7684\u6570\u5B57\u3002</p><p>\u8FD9\u79CD\u5B58\u50A8\u5C31\u662F\u5BC4\u5B58\u5668\uFF0C\u5BC4\u5B58\u5668\u5C31\u5728 CPU \u91CC\uFF0C\u63A7\u5236\u5355\u5143\u548C\u903B\u8F91\u8FD0\u7B97\u5355\u5143\u975E\u5E38\u8FD1\uFF0C\u56E0\u6B64\u901F\u5EA6\u5F88\u5FEB\u3002</p><p>\u5E38\u89C1\u7684\u5BC4\u5B58\u5668\u79CD\u7C7B\uFF1A</p><ul><li>\u901A\u7528\u5BC4\u5B58\u5668\uFF0C\u7528\u6765\u5B58\u653E\u9700\u8981\u8FDB\u884C\u8FD0\u7B97\u7684\u6570\u636E\uFF0C\u6BD4\u5982\u9700\u8981\u8FDB\u884C\u52A0\u548C\u8FD0\u7B97\u7684\u4E24\u4E2A\u6570\u636E\u3002</li><li>\u7A0B\u5E8F\u8BA1\u6570\u5668\uFF0C\u7528\u6765\u5B58\u50A8 CPU \u8981\u6267\u884C\u4E0B\u4E00\u6761\u6307\u4EE4\u6240\u5728\u7684\u5185\u5B58\u5730\u5740\uFF0C\u6CE8\u610F\u4E0D\u662F\u5B58\u50A8\u4E86\u4E0B\u4E00\u6761\u8981\u6267\u884C\u7684\u6307\u4EE4\uFF0C\u6B64\u65F6\u6307\u4EE4\u8FD8\u5728\u5185\u5B58\u4E2D\uFF0C\u7A0B\u5E8F\u8BA1\u6570\u5668\u53EA\u662F\u5B58\u50A8\u4E86\u4E0B\u4E00\u6761\u6307\u4EE4\u7684\u5730\u5740\u3002</li><li>\u6307\u4EE4\u5BC4\u5B58\u5668\uFF0C\u7528\u6765\u5B58\u653E\u7A0B\u5E8F\u8BA1\u6570\u5668\u6307\u5411\u7684\u6307\u4EE4\uFF0C\u4E5F\u5C31\u662F\u6307\u4EE4\u672C\u8EAB\uFF0C\u6307\u4EE4\u88AB\u6267\u884C\u5B8C\u6210\u4E4B\u524D\uFF0C\u6307\u4EE4\u90FD\u5B58\u50A8\u5728\u8FD9\u91CC\u3002</li></ul><h4 id="\u591A\u7EA7\u7F13\u5B58" tabindex="-1"><a class="header-anchor" href="#\u591A\u7EA7\u7F13\u5B58" aria-hidden="true">#</a> \u591A\u7EA7\u7F13\u5B58</h4><p>\u73B0\u4EE3CPU\u4E3A\u4E86\u63D0\u5347\u6267\u884C\u6548\u7387\uFF0C\u51CF\u5C11CPU\u4E0E\u5185\u5B58\u7684\u4EA4\u4E92(\u4EA4\u4E92\u5F71\u54CDCPU\u6548\u7387)\uFF0C\u4E00\u822C\u5728CPU\u4E0A\u96C6\u6210\u4E86\u591A\u7EA7\u7F13\u5B58\u67B6\u6784</p><p><strong>CPU\u7F13\u5B58</strong>\u5373\u9AD8\u901F\u7F13\u51B2\u5B58\u50A8\u5668\uFF0C\u662F\u4F4D\u4E8ECPU\u4E0E\u4E3B\u5185\u5B58\u95F4\u7684\u4E00\u79CD\u5BB9\u91CF\u8F83\u5C0F\u4F46\u901F\u5EA6\u5F88\u9AD8\u7684\u5B58\u50A8\u5668</p><p>\u7531\u4E8ECPU\u7684\u901F\u5EA6\u8FDC\u9AD8\u4E8E\u4E3B\u5185\u5B58\uFF0CCPU\u76F4\u63A5\u4ECE\u5185\u5B58\u4E2D\u5B58\u53D6\u6570\u636E\u8981\u7B49\u5F85\u4E00\u5B9A\u65F6\u95F4\u5468\u671F\uFF0CCache\u4E2D\u4FDD\u5B58\u7740CPU\u521A\u7528\u8FC7\u6216\u5FAA\u73AF\u4F7F\u7528\u7684\u4E00\u90E8\u5206\u6570\u636E\uFF0C\u5F53CPU\u518D\u6B21\u4F7F\u7528\u8BE5\u90E8\u5206\u6570\u636E\u65F6\u53EF\u4ECECache\u4E2D\u76F4\u63A5\u8C03\u7528\uFF0C\u51CF\u5C11CPU\u7684\u7B49\u5F85\u65F6\u95F4\uFF0C\u63D0\u9AD8\u4E86\u7CFB\u7EDF\u7684\u6548\u7387\uFF0C\u5177\u4F53\u5305\u62EC\u4EE5\u4E0B\u51E0\u79CD\uFF1A</p><p><strong>L1-Cache</strong></p><p>L1- \u7F13\u5B58\u5728 CPU \u4E2D\uFF0C\u76F8\u6BD4\u5BC4\u5B58\u5668\uFF0C\u867D\u7136\u5B83\u7684\u4F4D\u7F6E\u8DDD\u79BB CPU \u6838\u5FC3\u66F4\u8FDC\uFF0C\u4F46\u9020\u4EF7\u66F4\u4F4E\uFF0C\u901A\u5E38 L1-Cache \u5927\u5C0F\u5728\u51E0\u5341 Kb \u5230\u51E0\u767E Kb \u4E0D\u7B49\uFF0C\u8BFB\u5199\u901F\u5EA6\u5728 2~4 \u4E2A CPU \u65F6\u949F\u5468\u671F\u3002</p><p><strong>L2-Cache</strong></p><p>L2- \u7F13\u5B58\u4E5F\u5728 CPU \u4E2D\uFF0C\u4F4D\u7F6E\u6BD4 L1- \u7F13\u5B58\u8DDD\u79BB CPU \u6838\u5FC3\u66F4\u8FDC\uFF0C\u5B83\u7684\u5927\u5C0F\u6BD4 L1-Cache \u66F4\u5927\uFF0C\u5177\u4F53\u5927\u5C0F\u8981\u770B CPU \u578B\u53F7\uFF0C\u6709 2M \u7684\uFF0C\u4E5F\u6709\u66F4\u5C0F\u6216\u8005\u66F4\u5927\u7684\uFF0C\u901F\u5EA6\u5728 10~20 \u4E2A CPU \u5468\u671F\u3002</p><p><strong>L3-Cache</strong></p><p>L3- \u7F13\u5B58\u540C\u6837\u5728 CPU \u4E2D\uFF0C\u4F4D\u7F6E\u6BD4 L2- \u7F13\u5B58\u8DDD\u79BB CPU \u6838\u5FC3\u66F4\u8FDC\uFF0C\u5927\u5C0F\u901A\u5E38\u6BD4 L2-Cache \u66F4\u5927\uFF0C\u8BFB\u5199\u901F\u5EA6\u5728 20~60 \u4E2A CPU \u5468\u671F\u3002</p><p>L3 \u7F13\u5B58\u5927\u5C0F\u4E5F\u662F\u770B\u578B\u53F7\u7684\uFF0C\u6BD4\u5982 i9 CPU \u6709 512KB L1 Cache\uFF1B\u6709 2MB L2 Cache\uFF1B \u670916MB L3 Cache\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/os-214a4294-df48-4ed4-8f6a-15c93c02037d.png" alt=""></p><p>\u5F53 CPU \u9700\u8981\u5185\u5B58\u4E2D\u67D0\u4E2A\u6570\u636E\u7684\u65F6\u5019\uFF0C\u5982\u679C\u5BC4\u5B58\u5668\u4E2D\u6709\u8FD9\u4E2A\u6570\u636E\uFF0C\u6211\u4EEC\u53EF\u4EE5\u76F4\u63A5\u4F7F\u7528\uFF1B\u5982\u679C\u5BC4\u5B58\u5668\u4E2D\u6CA1\u6709\u8FD9\u4E2A\u6570\u636E\uFF0C\u6211\u4EEC\u5C31\u8981\u5148\u67E5\u8BE2 L1 \u7F13\u5B58\uFF1BL1 \u4E2D\u6CA1\u6709\uFF0C\u518D\u67E5\u8BE2 L2 \u7F13\u5B58\uFF1BL2 \u4E2D\u6CA1\u6709\u518D\u67E5\u8BE2 L3 \u7F13\u5B58\uFF1BL3 \u4E2D\u6CA1\u6709\uFF0C\u518D\u53BB\u5185\u5B58\u4E2D\u62FF\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/os-936b2476-4704-4928-bfd0-d7417d0f1ab8.png" alt=""></p><p><strong>\u603B\u7ED3\uFF1A</strong></p><p>\u5B58\u50A8\u5668\u5B58\u50A8\u7A7A\u95F4\u5927\u5C0F\uFF1A\u5185\u5B58&gt;L3&gt;L2&gt;L1&gt;\u5BC4\u5B58\u5668\uFF1B</p><p>\u5B58\u50A8\u5668\u901F\u5EA6\u5FEB\u6162\u6392\u5E8F\uFF1A\u5BC4\u5B58\u5668&gt;L1&gt;L2&gt;L3&gt;\u5185\u5B58\uFF1B</p><h4 id="\u5B89\u5168\u7B49\u7EA7" tabindex="-1"><a class="header-anchor" href="#\u5B89\u5168\u7B49\u7EA7" aria-hidden="true">#</a> \u5B89\u5168\u7B49\u7EA7</h4><p><strong>CPU\u8FD0\u884C\u5B89\u5168\u7B49\u7EA7</strong></p><p>CPU\u67094\u4E2A\u8FD0\u884C\u7EA7\u522B\uFF0C\u5206\u522B\u4E3A\uFF1A</p><ul><li>ring0\uFF0Cring1\uFF0Cring2\uFF0Cring3</li></ul><p>ring0\u53EA\u7ED9\u64CD\u4F5C\u7CFB\u7EDF\u7528\uFF0Cring3\u8C01\u90FD\u80FD\u7528\u3002</p><p>ring0\u662F\u6307CPU\u7684\u8FD0\u884C\u7EA7\u522B\uFF0C\u662F\u6700\u9AD8\u7EA7\u522B\uFF0Cring1\u6B21\u4E4B\uFF0Cring2\u66F4\u6B21\u4E4B\u2026\u2026</p><p>\u7CFB\u7EDF\uFF08\u5185\u6838\uFF09\u7684\u4EE3\u7801\u8FD0\u884C\u5728\u6700\u9AD8\u8FD0\u884C\u7EA7\u522Bring0\u4E0A\uFF0C\u53EF\u4EE5\u4F7F\u7528\u7279\u6743\u6307\u4EE4\uFF0C\u63A7\u5236\u4E2D\u65AD\u3001\u4FEE\u6539\u9875\u8868\u3001\u8BBF\u95EE\u8BBE\u5907\u7B49\u7B49\u3002</p><p>\u5E94\u7528\u7A0B\u5E8F\u7684\u4EE3\u7801\u8FD0\u884C\u5728\u6700\u4F4E\u8FD0\u884C\u7EA7\u522B\u4E0Aring3\u4E0A\uFF0C\u4E0D\u80FD\u505A\u53D7\u63A7\u64CD\u4F5C\u3002</p><p>\u5982\u679C\u8981\u505A\uFF0C\u6BD4\u5982\u8981\u8BBF\u95EE\u78C1\u76D8\uFF0C\u5199\u6587\u4EF6\uFF0C\u90A3\u5C31\u8981\u901A\u8FC7\u6267\u884C\u7CFB\u7EDF\u8C03\u7528\uFF08\u51FD\u6570\uFF09\uFF0C\u6267\u884C\u7CFB\u7EDF\u8C03\u7528\u7684\u65F6\u5019\uFF0CCPU\u7684\u8FD0\u884C\u7EA7\u522B\u4F1A\u53D1\u751F\u4ECEring3\u5230ring0\u7684\u5207\u6362\uFF0C\u5E76\u8DF3\u8F6C\u5230\u7CFB\u7EDF\u8C03\u7528\u5BF9\u5E94\u7684\u5185\u6838\u4EE3\u7801\u4F4D\u7F6E\u6267\u884C\uFF0C\u8FD9\u6837\u5185\u6838\u5C31\u4E3A\u4F60\u5B8C\u6210\u4E86\u8BBE\u5907\u8BBF\u95EE\uFF0C\u5B8C\u6210\u4E4B\u540E\u518D\u4ECEring0\u8FD4\u56DEring3\u3002</p><p>\u8FD9\u4E2A\u8FC7\u7A0B\u4E5F\u79F0\u4F5C\u7528\u6237\u6001\u548C\u5185\u6838\u6001\u7684\u5207\u6362\u3002</p><h4 id="\u5C40\u90E8\u6027\u539F\u7406" tabindex="-1"><a class="header-anchor" href="#\u5C40\u90E8\u6027\u539F\u7406" aria-hidden="true">#</a> \u5C40\u90E8\u6027\u539F\u7406</h4><p>\u5728CPU\u8BBF\u95EE\u5B58\u50A8\u8BBE\u5907\u65F6\uFF0C\u65E0\u8BBA\u662F\u5B58\u53D6\u6570\u636E\u6291\u6216\u5B58\u53D6\u6307\u4EE4\uFF0C\u90FD\u8D8B\u4E8E\u805A\u96C6\u5728\u4E00\u7247\u8FDE\u7EED\u7684\u533A\u57DF\u4E2D\uFF0C\u8FD9\u5C31\u88AB\u79F0\u4E3A\u5C40\u90E8\u6027\u539F\u7406</p><p><strong>\u65F6\u95F4\u5C40\u90E8\u6027\uFF08Temporal Locality\uFF09\uFF1A</strong></p><p>\u5982\u679C\u4E00\u4E2A\u4FE1\u606F\u9879\u6B63\u5728\u88AB\u8BBF\u95EE\uFF0C\u90A3\u4E48\u5728\u8FD1\u671F\u5B83\u5F88\u53EF\u80FD\u8FD8\u4F1A\u88AB\u518D\u6B21\u8BBF\u95EE\u3002</p><p>\u6BD4\u5982\u5FAA\u73AF\u3001\u9012\u5F52\u3001\u65B9\u6CD5\u7684\u53CD\u590D\u8C03\u7528\u7B49\u3002</p><p><strong>\u7A7A\u95F4\u5C40\u90E8\u6027\uFF08Spatial Locality\uFF09\uFF1A</strong></p><p>\u5982\u679C\u4E00\u4E2A\u5B58\u50A8\u5668\u7684\u4F4D\u7F6E\u88AB\u5F15\u7528\uFF0C\u90A3\u4E48\u5C06\u6765\u4ED6\u9644\u8FD1\u7684\u4F4D\u7F6E\u4E5F\u4F1A\u88AB\u5F15\u7528\u3002</p><p>\u6BD4\u5982\u987A\u5E8F\u6267\u884C\u7684\u4EE3\u7801\u3001\u8FDE\u7EED\u521B\u5EFA\u7684\u4E24\u4E2A\u5BF9\u8C61\u3001\u6570\u7EC4\u7B49\u3002</p><h4 id="\u7A0B\u5E8F\u7684\u6267\u884C\u8FC7\u7A0B" tabindex="-1"><a class="header-anchor" href="#\u7A0B\u5E8F\u7684\u6267\u884C\u8FC7\u7A0B" aria-hidden="true">#</a> \u7A0B\u5E8F\u7684\u6267\u884C\u8FC7\u7A0B</h4><p>\u7A0B\u5E8F\u5B9E\u9645\u4E0A\u662F\u4E00\u6761\u4E00\u6761\u6307\u4EE4\uFF0C\u6240\u4EE5\u7A0B\u5E8F\u7684\u8FD0\u884C\u8FC7\u7A0B\u5C31\u662F\u628A\u6BCF\u4E00\u6761\u6307\u4EE4\u4E00\u6B65\u4E00\u6B65\u7684\u6267\u884C\u8D77\u6765\uFF0C\u8D1F\u8D23\u6267\u884C\u6307\u4EE4\u7684\u5C31\u662F CPU \u4E86\u3002</p><p><strong>\u90A3 CPU \u6267\u884C\u7A0B\u5E8F\u7684\u8FC7\u7A0B\u5982\u4E0B\uFF1A</strong></p><ul><li>\u7B2C\u4E00\u6B65\uFF0CCPU \u8BFB\u53D6\u7A0B\u5E8F\u8BA1\u6570\u5668\u7684\u503C\uFF0C\u8FD9\u4E2A\u503C\u662F\u6307\u4EE4\u7684\u5185\u5B58\u5730\u5740\uFF0C\u7136\u540E CPU \u7684\u63A7\u5236\u5355\u5143\u64CD\u4F5C\u5730\u5740\u603B\u7EBF\u6307\u5B9A\u9700\u8981\u8BBF\u95EE\u7684\u5185\u5B58\u5730\u5740\uFF0C\u63A5\u7740\u901A\u77E5\u5185\u5B58\u8BBE\u5907\u51C6\u5907\u6570\u636E\uFF0C\u6570\u636E\u51C6\u5907\u597D\u540E\u901A\u8FC7\u6570\u636E\u603B\u7EBF\u5C06\u6307\u4EE4\u6570\u636E\u4F20\u7ED9 CPU\uFF0CCPU \u6536\u5230\u5185\u5B58\u4F20\u6765\u7684\u6570\u636E\u540E\uFF0C\u5C06\u8FD9\u4E2A\u6307\u4EE4\u6570\u636E\u5B58\u5165\u5230\u6307\u4EE4\u5BC4\u5B58\u5668\u3002</li><li>\u7B2C\u4E8C\u6B65\uFF0CCPU \u5206\u6790\u6307\u4EE4\u5BC4\u5B58\u5668\u4E2D\u7684\u6307\u4EE4\uFF0C\u786E\u5B9A\u6307\u4EE4\u7684\u7C7B\u578B\u548C\u53C2\u6570\uFF0C\u5982\u679C\u662F\u8BA1\u7B97\u7C7B\u578B\u7684\u6307\u4EE4\uFF0C\u5C31\u628A\u6307\u4EE4\u4EA4\u7ED9\u903B\u8F91\u8FD0\u7B97\u5355\u5143\u8FD0\u7B97\uFF1B\u5982\u679C\u662F\u5B58\u50A8\u7C7B\u578B\u7684\u6307\u4EE4\uFF0C\u5219\u4EA4\u7531\u63A7\u5236\u5355\u5143\u6267\u884C\uFF1B</li><li>\u7B2C\u4E09\u6B65\uFF0CCPU \u6267\u884C\u5B8C\u6307\u4EE4\u540E\uFF0C\u7A0B\u5E8F\u8BA1\u6570\u5668\u7684\u503C\u81EA\u589E\uFF0C\u8868\u793A\u6307\u5411\u4E0B\u4E00\u6761\u6307\u4EE4\u3002\u8FD9\u4E2A\u81EA\u589E\u7684\u5927\u5C0F\uFF0C\u7531 CPU \u7684\u4F4D\u5BBD\u51B3\u5B9A\uFF0C\u6BD4\u5982 32 \u4F4D\u7684 CPU\uFF0C\u6307\u4EE4\u662F 4 \u4E2A\u5B57\u8282\uFF0C\u9700\u8981 4 \u4E2A\u5185\u5B58\u5730\u5740\u5B58\u653E\uFF0C\u56E0\u6B64\u7A0B\u5E8F\u8BA1\u6570\u5668\u7684\u503C\u4F1A\u81EA\u589E 4\uFF1B</li></ul><p>\u7B80\u5355\u603B\u7ED3\u4E00\u4E0B\u5C31\u662F\uFF0C\u4E00\u4E2A\u7A0B\u5E8F\u6267\u884C\u7684\u65F6\u5019\uFF0CCPU \u4F1A\u6839\u636E\u7A0B\u5E8F\u8BA1\u6570\u5668\u91CC\u7684\u5185\u5B58\u5730\u5740\uFF0C\u4ECE\u5185\u5B58\u91CC\u9762\u628A\u9700\u8981\u6267\u884C\u7684\u6307\u4EE4\u8BFB\u53D6\u5230\u6307\u4EE4\u5BC4\u5B58\u5668\u91CC\u9762\u6267\u884C\uFF0C\u7136\u540E\u6839\u636E\u6307\u4EE4\u957F\u5EA6\u81EA\u589E\uFF0C\u5F00\u59CB\u987A\u5E8F\u8BFB\u53D6\u4E0B\u4E00\u6761\u6307\u4EE4\u3002</p><p>CPU \u4ECE\u7A0B\u5E8F\u8BA1\u6570\u5668\u8BFB\u53D6\u6307\u4EE4\u3001\u5230\u6267\u884C\u3001\u518D\u5230\u4E0B\u4E00\u6761\u6307\u4EE4\uFF0C\u8FD9\u4E2A\u8FC7\u7A0B\u4F1A\u4E0D\u65AD\u5FAA\u73AF\uFF0C\u76F4\u5230\u7A0B\u5E8F\u6267\u884C\u7ED3\u675F\uFF0C\u8FD9\u4E2A\u4E0D\u65AD\u5FAA\u73AF\u7684\u8FC7\u7A0B\u88AB\u79F0\u4E3A <strong>CPU \u7684\u6307\u4EE4\u5468\u671F</strong>\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/os-0e135ca2-26fa-4495-8a4b-3c9c05a4341e.png" alt=""></p><h3 id="\u603B\u7EBF" tabindex="-1"><a class="header-anchor" href="#\u603B\u7EBF" aria-hidden="true">#</a> \u603B\u7EBF</h3><p>CPU \u548C\u5185\u5B58\u4EE5\u53CA\u5176\u4ED6\u8BBE\u5907\u4E4B\u95F4\uFF0C\u4E5F\u9700\u8981\u901A\u4FE1\uFF0C\u56E0\u6B64\u6211\u4EEC\u7528\u4E00\u79CD\u7279\u6B8A\u7684\u8BBE\u5907\u8FDB\u884C\u63A7\u5236\uFF0C\u5C31\u662F\u603B\u7EBF\u3002</p><ul><li>\u5730\u5740\u603B\u7EBF\uFF0C\u7528\u4E8E\u6307\u5B9A CPU \u5C06\u8981\u64CD\u4F5C\u7684\u5185\u5B58\u5730\u5740\uFF1B</li><li>\u6570\u636E\u603B\u7EBF\uFF0C\u7528\u4E8E\u8BFB\u5199\u5185\u5B58\u7684\u6570\u636E\uFF1B</li><li>\u63A7\u5236\u603B\u7EBF\uFF0C\u7528\u4E8E\u53D1\u9001\u548C\u63A5\u6536\u4FE1\u53F7\uFF0C\u6BD4\u5982\u4E2D\u65AD\u3001\u8BBE\u5907\u590D\u4F4D\u7B49\u4FE1\u53F7\uFF0CCPU \u6536\u5230\u4FE1\u53F7\u540E\u81EA\u7136\u8FDB\u884C\u54CD\u5E94\uFF0C\u8FD9\u65F6\u4E5F\u9700\u8981\u63A7\u5236\u603B\u7EBF\uFF1B</li></ul><p>\u5F53 CPU \u8981\u8BFB\u5199\u5185\u5B58\u6570\u636E\u7684\u65F6\u5019\uFF0C\u4E00\u822C\u9700\u8981\u901A\u8FC7\u4E24\u4E2A\u603B\u7EBF\uFF1A</p><ul><li>\u9996\u5148\u8981\u901A\u8FC7\u5730\u5740\u603B\u7EBF\u6765\u6307\u5B9A\u5185\u5B58\u7684\u5730\u5740\uFF1B</li><li>\u518D\u901A\u8FC7\u6570\u636E\u603B\u7EBF\u6765\u4F20\u8F93\u6570\u636E\uFF1B</li></ul><h3 id="\u8F93\u5165\u3001\u8F93\u51FA\u8BBE\u5907" tabindex="-1"><a class="header-anchor" href="#\u8F93\u5165\u3001\u8F93\u51FA\u8BBE\u5907" aria-hidden="true">#</a> \u8F93\u5165\u3001\u8F93\u51FA\u8BBE\u5907</h3><p>\u8F93\u5165\u8BBE\u5907\u5411\u8BA1\u7B97\u673A\u8F93\u5165\u6570\u636E\uFF0C\u8BA1\u7B97\u673A\u7ECF\u8FC7\u8BA1\u7B97\uFF0C\u5C06\u7ED3\u679C\u901A\u8FC7\u8F93\u51FA\u8BBE\u5907\u5411\u5916\u754C\u4F20\u8FBE\u3002</p><p>\u5982\u679C\u8F93\u5165\u8BBE\u5907\u3001\u8F93\u51FA\u8BBE\u5907\u60F3\u8981\u548C CPU \u8FDB\u884C\u4EA4\u4E92\uFF0C\u6BD4\u5982\u8BF4\u7528\u6237\u6309\u952E\u9700\u8981 CPU \u54CD\u5E94\uFF0C\u8FD9\u65F6\u5019\u5C31\u9700\u8981\u7528\u5230\u63A7\u5236\u603B\u7EBF\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><h2 id="\u57FA\u7840\u77E5\u8BC6" tabindex="-1"><a class="header-anchor" href="#\u57FA\u7840\u77E5\u8BC6" aria-hidden="true">#</a> \u57FA\u7840\u77E5\u8BC6</h2><h3 id="\u4E2D\u65AD" tabindex="-1"><a class="header-anchor" href="#\u4E2D\u65AD" aria-hidden="true">#</a> \u4E2D\u65AD</h3><p><strong>\u4E2D\u65AD\u7684\u7C7B\u578B</strong></p><ul><li><p>\u6309\u7167\u4E2D\u65AD\u7684\u89E6\u53D1\u65B9\u5206\u6210\u540C\u6B65\u4E2D\u65AD\u548C\u5F02\u6B65\u4E2D\u65AD\uFF1B</p></li><li><p>\u6839\u636E\u4E2D\u65AD\u662F\u5426\u5F3A\u5236\u89E6\u53D1\u5206\u6210\u53EF\u5C4F\u853D\u4E2D\u65AD\u548C\u4E0D\u53EF\u5C4F\u853D\u4E2D\u65AD\u3002</p></li></ul><p>\u4E2D\u65AD\u53EF\u4EE5\u7531 CPU \u6307\u4EE4\u76F4\u63A5\u89E6\u53D1\uFF0C\u8FD9\u79CD\u4E3B\u52A8\u89E6\u53D1\u7684\u4E2D\u65AD\uFF0C\u53EB\u4F5C\u540C\u6B65\u4E2D\u65AD\u3002</p><blockquote><p>\u540C\u6B65\u4E2D\u65AD\u6709\u51E0\u79CD\u60C5\u51B5\u3002</p></blockquote><ul><li><p>\u6BD4\u5982\u7CFB\u7EDF\u8C03\u7528\uFF0C\u9700\u8981\u4ECE\u7528\u6237\u6001\u5207\u6362\u5185\u6838\u6001\uFF0C\u8FD9\u79CD\u60C5\u51B5\u9700\u8981\u7A0B\u5E8F\u89E6\u53D1\u4E00\u4E2A\u4E2D\u65AD\uFF0C\u53EB\u4F5C\u9677\u9631\uFF08Trap\uFF09\uFF0C\u4E2D\u65AD\u89E6\u53D1\u540E\u9700\u8981\u7EE7\u7EED\u6267\u884C\u7CFB\u7EDF\u8C03\u7528\u3002</p></li><li><p>\u8FD8\u6709\u4E00\u79CD\u540C\u6B65\u4E2D\u65AD\u60C5\u51B5\u662F\u9519\u8BEF\uFF08Fault\uFF09\uFF0C\u901A\u5E38\u662F\u56E0\u4E3A\u68C0\u6D4B\u5230\u67D0\u79CD\u9519\u8BEF\uFF0C\u9700\u8981\u89E6\u53D1\u4E00\u4E2A\u4E2D\u65AD\uFF0C\u4E2D\u65AD\u54CD\u5E94\u7ED3\u675F\u540E\uFF0C\u4F1A\u91CD\u65B0\u6267\u884C\u89E6\u53D1\u9519\u8BEF\u7684\u5730\u65B9\uFF0C\u6BD4\u5982\u540E\u9762\u6211\u4EEC\u8981\u5B66\u4E60\u7684\u7F3A\u9875\u4E2D\u65AD\u3002</p></li><li><p>\u6700\u540E\u8FD8\u6709\u4E00\u79CD\u60C5\u51B5\u662F\u7A0B\u5E8F\u7684\u5F02\u5E38\uFF0C\u8FD9\u79CD\u60C5\u51B5\u548C Trap \u7C7B\u4F3C\uFF0C\u7528\u4E8E\u5B9E\u73B0\u7A0B\u5E8F\u629B\u51FA\u7684\u5F02\u5E38\u3002</p></li></ul><p>\u53E6\u4E00\u90E8\u5206\u4E2D\u65AD\u4E0D\u662F\u7531 CPU \u76F4\u63A5\u89E6\u53D1\uFF0C\u662F\u56E0\u4E3A\u9700\u8981\u54CD\u5E94\u5916\u90E8\u7684\u901A\u77E5\uFF0C\u6BD4\u5982\u54CD\u5E94\u952E\u76D8\u3001\u9F20\u6807\u7B49\u8BBE\u5907\u800C\u89E6\u53D1\u7684\u4E2D\u65AD\uFF0C\u8FD9\u79CD\u4E2D\u65AD\u6211\u4EEC\u79F0\u4E3A\u5F02\u6B65\u4E2D\u65AD\u3002</p><p>CPU \u901A\u5E38\u90FD\u652F\u6301\u8BBE\u7F6E\u4E00\u4E2A\u4E2D\u65AD\u5C4F\u853D\u4F4D\uFF08\u4E00\u4E2A\u5BC4\u5B58\u5668\uFF09\uFF0C\u8BBE\u7F6E\u4E3A 1 \u4E4B\u540E CPU \u6682\u65F6\u5C31\u4E0D\u518D\u54CD\u5E94\u4E2D\u65AD\u3002</p><p>\u5BF9\u4E8E\u952E\u76D8\u9F20\u6807\u8F93\u5165\uFF0C\u6BD4\u5982\u9677\u9631\u3001\u9519\u8BEF\u3001\u5F02\u5E38\u7B49\u60C5\u51B5\uFF0C\u4F1A\u88AB\u4E34\u65F6\u5C4F\u853D\u3002</p><p>\u4F46\u662F\u5BF9\u4E8E\u4E00\u4E9B\u7279\u522B\u91CD\u8981\u7684\u4E2D\u65AD\uFF0C\u6BD4\u5982 CPU \u6545\u969C\u5BFC\u81F4\u7684\u6389\u7535\u4E2D\u65AD\uFF0C\u8FD8\u662F\u4F1A\u6B63\u5E38\u89E6\u53D1\u3002</p><p><strong>\u53EF\u4EE5\u88AB\u5C4F\u853D\u7684\u4E2D\u65AD\u6211\u4EEC\u79F0\u4E3A\u53EF\u5C4F\u853D\u4E2D\u65AD\uFF0C\u591A\u6570\u4E2D\u65AD\u90FD\u662F\u53EF\u5C4F\u853D\u4E2D\u65AD\u3002</strong></p><h3 id="\u5185\u6838\u6001\u548C\u7528\u6237\u6001" tabindex="-1"><a class="header-anchor" href="#\u5185\u6838\u6001\u548C\u7528\u6237\u6001" aria-hidden="true">#</a> \u5185\u6838\u6001\u548C\u7528\u6237\u6001</h3><p><strong>\u4EC0\u4E48\u662F\u7528\u6237\u6001\u548C\u5185\u6838\u6001</strong></p><p>Kernel \u8FD0\u884C\u5728\u8D85\u7EA7\u6743\u9650\u6A21\u5F0F\u4E0B\uFF0C\u6240\u4EE5\u62E5\u6709\u5F88\u9AD8\u7684\u6743\u9650\u3002</p><p>\u6309\u7167\u6743\u9650\u7BA1\u7406\u7684\u539F\u5219\uFF0C\u591A\u6570\u5E94\u7528\u7A0B\u5E8F\u5E94\u8BE5\u8FD0\u884C\u5728\u6700\u5C0F\u6743\u9650\u4E0B\u3002</p><p>\u56E0\u6B64\uFF0C\u5F88\u591A\u64CD\u4F5C\u7CFB\u7EDF\uFF0C\u5C06\u5185\u5B58\u5206\u6210\u4E86\u4E24\u4E2A\u533A\u57DF\uFF1A</p><ul><li><p>\u5185\u6838\u7A7A\u95F4\uFF08Kernal Space\uFF09\uFF0C\u8FD9\u4E2A\u7A7A\u95F4\u53EA\u6709\u5185\u6838\u7A0B\u5E8F\u53EF\u4EE5\u8BBF\u95EE\uFF1B</p></li><li><p>\u7528\u6237\u7A7A\u95F4\uFF08User Space\uFF09\uFF0C\u8FD9\u90E8\u5206\u5185\u5B58\u4E13\u95E8\u7ED9\u5E94\u7528\u7A0B\u5E8F\u4F7F\u7528\u3002</p></li></ul><p>\u7528\u6237\u7A7A\u95F4\u4E2D\u7684\u4EE3\u7801\u88AB\u9650\u5236\u4E86\u53EA\u80FD\u4F7F\u7528\u4E00\u4E2A\u5C40\u90E8\u7684\u5185\u5B58\u7A7A\u95F4\uFF0C\u6211\u4EEC\u8BF4\u8FD9\u4E9B\u7A0B\u5E8F\u5728\u7528\u6237\u6001 \u6267\u884C\u3002</p><p>\u5185\u6838\u7A7A\u95F4\u4E2D\u7684\u4EE3\u7801\u53EF\u4EE5\u8BBF\u95EE\u6240\u6709\u5185\u5B58\uFF0C\u6211\u4EEC\u79F0\u8FD9\u4E9B\u7A0B\u5E8F\u5728\u5185\u6838\u6001 \u6267\u884C\u3002</p><blockquote><p>\u6309\u7167\u7EA7\u522B\u5206\uFF1A</p></blockquote><p>\u5F53\u7A0B\u5E8F\u8FD0\u884C\u57280\u7EA7\u7279\u6743\u7EA7\u4E0A\u65F6\uFF0C\u5C31\u53EF\u4EE5\u79F0\u4E4B\u4E3A\u8FD0\u884C\u5728\u5185\u6838\u6001</p><p>\u5F53\u7A0B\u5E8F\u8FD0\u884C\u57283\u7EA7\u7279\u6743\u7EA7\u4E0A\u65F6\uFF0C\u5C31\u53EF\u4EE5\u79F0\u4E4B\u4E3A\u8FD0\u884C\u5728\u7528\u6237\u6001</p><p>\u8FD0\u884C\u5728\u7528\u6237\u6001\u4E0B\u7684\u7A0B\u5E8F\u4E0D\u80FD\u76F4\u63A5\u8BBF\u95EE\u64CD\u4F5C\u7CFB\u7EDF\u5185\u6838\u6570\u636E\u7ED3\u6784\u548C\u7A0B\u5E8F\u3002</p><p>\u5F53\u6211\u4EEC\u5728\u7CFB\u7EDF\u4E2D\u6267\u884C\u4E00\u4E2A\u7A0B\u5E8F\u65F6\uFF0C\u5927\u90E8\u5206\u65F6\u95F4\u662F\u8FD0\u884C\u5728\u7528\u6237\u6001\u4E0B\u7684\uFF0C\u5728\u5176\u9700\u8981\u64CD\u4F5C\u7CFB\u7EDF\u5E2E\u52A9\u5B8C\u6210\u67D0\u4E9B\u5B83\u6CA1\u6709\u6743\u529B\u548C\u80FD\u529B\u5B8C\u6210\u7684\u5DE5\u4F5C\u65F6\u5C31\u4F1A\u5207\u6362\u5230\u5185\u6838\u6001\uFF08\u6BD4\u5982\u64CD\u4F5C\u786C\u4EF6\uFF09</p><p><strong>\u8FD9\u4E24\u79CD\u72B6\u6001\u7684\u4E3B\u8981\u5DEE\u522B</strong></p><p>\u5904\u4E8E\u7528\u6237\u6001\u6267\u884C\u65F6\uFF0C\u8FDB\u7A0B\u6240\u80FD\u8BBF\u95EE\u7684\u5185\u5B58\u7A7A\u95F4\u548C\u5BF9\u8C61\u53D7\u5230\u9650\u5236\uFF0C\u5176\u6240\u5904\u4E8E\u5360\u6709\u7684\u5904\u7406\u5668\u662F\u53EF\u88AB\u62A2\u5360\u7684</p><p>\u5904\u4E8E\u5185\u6838\u6001\u6267\u884C\u65F6\uFF0C\u5219\u80FD\u8BBF\u95EE\u6240\u6709\u7684\u5185\u5B58\u7A7A\u95F4\u548C\u5BF9\u8C61\uFF0C\u4E14\u6240\u5360\u6709\u7684\u5904\u7406\u5668\u662F\u4E0D\u5141\u8BB8\u88AB\u62A2\u5360\u7684\u3002</p><p><strong>\u4E3A\u4EC0\u4E48\u8981\u6709\u7528\u6237\u6001\u548C\u5185\u6838\u6001</strong></p><p>\u7531\u4E8E\u9700\u8981\u9650\u5236\u4E0D\u540C\u7684\u7A0B\u5E8F\u4E4B\u95F4\u7684\u8BBF\u95EE\u80FD\u529B\uFF0C\u9632\u6B62\u4ED6\u4EEC\u83B7\u53D6\u522B\u7684\u7A0B\u5E8F\u7684\u5185\u5B58\u6570\u636E\uFF0C\u6216\u8005\u83B7\u53D6\u5916\u56F4\u8BBE\u5907\u7684\u6570\u636E\uFF0C\u5E76\u53D1\u9001\u5230\u7F51\u7EDC</p><p><strong>\u7528\u6237\u6001\u4E0E\u5185\u6838\u6001\u7684\u5207\u6362</strong></p><p>\u6240\u6709\u7528\u6237\u7A0B\u5E8F\u90FD\u662F\u8FD0\u884C\u5728\u7528\u6237\u6001\u7684\uFF0C\u4F46\u662F\u6709\u65F6\u5019\u7A0B\u5E8F\u786E\u5B9E\u9700\u8981\u505A\u4E00\u4E9B\u5185\u6838\u6001\u7684\u4E8B\u60C5\uFF0C \u4F8B\u5982\u4ECE\u786C\u76D8\u8BFB\u53D6\u6570\u636E\uFF0C\u6216\u8005\u4ECE\u952E\u76D8\u83B7\u53D6\u8F93\u5165\u7B49\uFF0C\u800C\u552F\u4E00\u53EF\u4EE5\u505A\u8FD9\u4E9B\u4E8B\u60C5\u7684\u5C31\u662F\u64CD\u4F5C\u7CFB\u7EDF\uFF0C\u6240\u4EE5\u6B64\u65F6\u7A0B\u5E8F\u5C31\u9700\u8981\u5148\u64CD\u4F5C\u7CFB\u7EDF\u8BF7\u6C42\u4EE5\u7A0B\u5E8F\u7684\u540D\u4E49\u6765\u6267\u884C\u8FD9\u4E9B\u64CD\u4F5C</p><p><strong>\u7528\u6237\u6001\u548C\u5185\u6838\u6001\u7684\u8F6C\u6362</strong></p><blockquote><p>\u7CFB\u7EDF\u8C03\u7528</p></blockquote><p>\u7528\u6237\u6001\u8FDB\u7A0B\u901A\u8FC7\u7CFB\u7EDF\u8C03\u7528\u7533\u8BF7\u4F7F\u7528\u64CD\u4F5C\u7CFB\u7EDF\u63D0\u4F9B\u7684\u670D\u52A1\u7A0B\u5E8F\u5B8C\u6210\u5DE5\u4F5C\uFF0C\u6BD4\u5982fork()\u5B9E\u9645\u4E0A\u5C31\u662F\u6267\u884C\u4E86\u4E00\u4E2A\u521B\u5EFA\u65B0\u8FDB\u7A0B\u7684\u7CFB\u7EDF\u8C03\u7528</p><p>\u800C\u7CFB\u7EDF\u8C03\u7528\u7684\u673A\u5236\u5176\u6838\u5FC3\u8FD8\u662F\u4F7F\u7528\u4E86\u64CD\u4F5C\u7CFB\u7EDF\u4E3A\u7528\u6237\u7279\u522B\u5F00\u653E\u7684\u4E00\u4E2A\u4E2D\u65AD\u6765\u5B9E\u73B0\uFF0C\u4F8B\u5982Linux\u7684int 80h\u4E2D\u65AD</p><p><strong>\u4E3E\u4F8B\uFF1A</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/os-29b6f34f-a8b3-48ec-8e5c-aea1036ea16a.png" alt=""></p><p>\u5982\u4E0A\u56FE\u6240\u793A\uFF1A\u5185\u6838\u7A0B\u5E8F\u6267\u884C\u5728\u5185\u6838\u6001\uFF08Kernal Mode\uFF09\uFF0C\u7528\u6237\u7A0B\u5E8F\u6267\u884C\u5728\u7528\u6237\u6001\uFF08User Mode\uFF09\u3002</p><p>\u5F53\u53D1\u751F\u7CFB\u7EDF\u8C03\u7528\u65F6\uFF0C\u7528\u6237\u6001\u7684\u7A0B\u5E8F\u53D1\u8D77\u7CFB\u7EDF\u8C03\u7528\uFF0C\u56E0\u4E3A\u7CFB\u7EDF\u8C03\u7528\u4E2D\u7275\u626F\u7279\u6743\u6307\u4EE4\uFF0C\u7528\u6237\u6001\u7A0B\u5E8F\u6743\u9650\u4E0D\u8DB3\uFF0C\u56E0\u6B64\u4F1A\u4E2D\u65AD\u6267\u884C\uFF0C\u4E5F\u5C31\u662F Trap\uFF08Trap \u662F\u4E00\u79CD\u4E2D\u65AD\uFF09\u3002</p><p>\u53D1\u751F\u4E2D\u65AD\u540E\uFF0C\u5F53\u524D CPU \u6267\u884C\u7684\u7A0B\u5E8F\u4F1A\u4E2D\u65AD\uFF0C\u8DF3\u8F6C\u5230\u4E2D\u65AD\u5904\u7406\u7A0B\u5E8F\uFF0C\u5185\u6838\u7A0B\u5E8F\u5F00\u59CB\u6267\u884C\uFF0C\u4E5F\u5C31\u662F\u5F00\u59CB\u5904\u7406\u7CFB\u7EDF\u8C03\u7528\u3002</p><p>\u5185\u6838\u5904\u7406\u5B8C\u6210\u540E\uFF0C\u4E3B\u52A8\u89E6\u53D1 Trap\uFF0C\u8FD9\u6837\u4F1A\u518D\u6B21\u53D1\u751F\u4E2D\u65AD\uFF0C\u5207\u6362\u56DE\u7528\u6237\u6001\u5DE5\u4F5C\u3002</p><blockquote><p>\u5F02\u5E38</p></blockquote><p>\u5F53CPU\u5728\u6267\u884C\u8FD0\u884C\u5728\u7528\u6237\u6001\u4E0B\u7684\u7A0B\u5E8F\u65F6\uFF0C\u53D1\u751F\u4E86\u67D0\u4E9B\u4E8B\u5148\u4E0D\u53EF\u77E5\u7684\u5F02\u5E38\uFF0C\u8FD9\u65F6\u4F1A\u89E6\u53D1\u7531\u5F53\u524D\u8FD0\u884C\u8FDB\u7A0B\u5207\u6362\u5230\u5904\u7406\u6B64\u5F02\u5E38\u7684\u5185\u6838\u76F8\u5173\u7A0B\u5E8F\u4E2D\uFF0C\u4E5F\u5C31\u8F6C\u5230\u4E86\u5185\u6838\u6001\uFF0C\u6BD4\u5982\u7F3A\u9875\u5F02\u5E38</p><blockquote><p>\u5916\u56F4\u8BBE\u5907\u7684\u4E2D\u65AD</p></blockquote><p>\u5F53\u5916\u56F4\u8BBE\u5907\u5B8C\u6210\u7528\u6237\u8BF7\u6C42\u7684\u64CD\u4F5C\u540E\uFF0C\u4F1A\u5411CPU\u53D1\u51FA\u76F8\u5E94\u7684\u4E2D\u65AD\u4FE1\u53F7\uFF0C\u8FD9\u65F6CPU\u4F1A\u6682\u505C\u6267\u884C\u4E0B\u4E00\u6761\u5373\u5C06\u8981\u6267\u884C\u7684\u6307\u4EE4\u8F6C\u800C\u53BB\u6267\u884C\u4E0E\u4E2D\u65AD\u4FE1\u53F7\u5BF9\u5E94\u7684\u5904\u7406\u7A0B\u5E8F\uFF0C\u5982\u679C\u5148\u524D\u6267\u884C\u7684\u6307\u4EE4\u662F\u7528\u6237\u6001\u4E0B\u7684\u7A0B\u5E8F\uFF0C\u90A3\u4E48\u8FD9\u4E2A\u8F6C\u6362\u7684\u8FC7\u7A0B\u81EA\u7136\u4E5F\u5C31\u53D1\u751F\u4E86\u7531\u7528\u6237\u6001\u5230\u5185\u6838\u6001\u7684\u5207\u6362</p><p>\u6BD4\u5982\u786C\u76D8\u8BFB\u5199\u64CD\u4F5C\u5B8C\u6210\uFF0C\u7CFB\u7EDF\u4F1A\u5207\u6362\u5230\u786C\u76D8\u8BFB\u5199\u7684\u4E2D\u65AD\u5904\u7406\u7A0B\u5E8F\u4E2D\u6267\u884C\u540E\u7EED\u64CD\u4F5C\u7B49</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><h2 id="\u7EBF\u7A0B" tabindex="-1"><a class="header-anchor" href="#\u7EBF\u7A0B" aria-hidden="true">#</a> \u7EBF\u7A0B</h2><p>\u7EBF\u7A0B\uFF1A\u7CFB\u7EDF\u5206\u914D\u5904\u7406\u5668\u65F6\u95F4\u8D44\u6E90\u7684\u57FA\u672C\u5355\u5143\uFF0C\u662F\u7A0B\u5E8F\u6267\u884C\u7684\u6700\u5C0F\u5355\u4F4D</p><p>\u7EBF\u7A0B\u53EF\u4EE5\u770B\u505A\u8F7B\u91CF\u7EA7\u7684\u8FDB\u7A0B\uFF0C\u5171\u4EAB\u5185\u5B58\u7A7A\u95F4\uFF0C\u6BCF\u4E2A\u7EBF\u7A0B\u90FD\u6709\u81EA\u5DF1\u72EC\u7ACB\u7684\u8FD0\u884C\u6808\u548C\u7A0B\u5E8F\u8BA1\u6570\u5668\uFF0C\u7EBF\u7A0B\u4E4B\u95F4\u5207\u6362\u7684\u5F00\u9500\u5C0F\u3002</p><p>\u5728\u540C\u4E00\u4E2A\u8FDB\u7A0B\uFF08\u7A0B\u5E8F\uFF09\u4E2D\u6709\u591A\u4E2A\u7EBF\u7A0B\u540C\u65F6\u6267\u884C\uFF08\u901A\u8FC7CPU\u8C03\u5EA6\uFF0C\u5728\u6BCF\u4E2A\u65F6\u95F4\u7247\u4E2D\u53EA\u6709\u4E00\u4E2A\u7EBF\u7A0B\u6267\u884C\uFF09</p><p>\u8FDB\u7A0B\u53EF\u4EE5\u901A\u8FC7 API \u521B\u5EFA\u7528\u6237\u6001\u7684\u7EBF\u7A0B\uFF0C\u4E5F\u53EF\u4EE5\u901A\u8FC7\u7CFB\u7EDF\u8C03\u7528\u521B\u5EFA\u5185\u6838\u6001\u7684\u7EBF\u7A0B\u3002</p><h3 id="\u7528\u6237\u6001\u7EBF\u7A0B" tabindex="-1"><a class="header-anchor" href="#\u7528\u6237\u6001\u7EBF\u7A0B" aria-hidden="true">#</a> \u7528\u6237\u6001\u7EBF\u7A0B</h3><p>\u7528\u6237\u6001\u7EBF\u7A0B\u4E5F\u79F0\u4F5C\u7528\u6237\u7EA7\u7EBF\u7A0B\uFF0C\u64CD\u4F5C\u7CFB\u7EDF\u5185\u6838\u5E76\u4E0D\u77E5\u9053\u5B83\u7684\u5B58\u5728\uFF0C\u5B83\u5B8C\u5168\u662F\u5728\u7528\u6237\u7A7A\u95F4\u4E2D\u521B\u5EFA\u3002</p><p>\u7528\u6237\u7EA7\u7EBF\u7A0B\u6709\u5F88\u591A\u4F18\u52BF\uFF0C\u6BD4\u5982\uFF1A</p><ul><li><p>\u7BA1\u7406\u5F00\u9500\u5C0F\uFF1A\u521B\u5EFA\u3001\u9500\u6BC1\u4E0D\u9700\u8981\u7CFB\u7EDF\u8C03\u7528\u3002</p></li><li><p>\u5207\u6362\u6210\u672C\u4F4E\uFF1A\u7528\u6237\u7A7A\u95F4\u7A0B\u5E8F\u53EF\u4EE5\u81EA\u5DF1\u7EF4\u62A4\uFF0C\u4E0D\u9700\u8981\u8D70\u64CD\u4F5C\u7CFB\u7EDF\u8C03\u5EA6\u3002</p></li></ul><p>\u4F46\u662F\u8FD9\u79CD\u7EBF\u7A0B\u4E5F\u6709\u5F88\u591A\u7684\u7F3A\u70B9\uFF1A</p><ul><li><p>\u4E0E\u5185\u6838\u534F\u4F5C\u6210\u672C\u9AD8\uFF1A\u6BD4\u5982\u8FD9\u79CD\u7EBF\u7A0B\u5B8C\u5168\u662F\u7528\u6237\u7A7A\u95F4\u7A0B\u5E8F\u5728\u7BA1\u7406\uFF0C\u5F53\u5B83\u8FDB\u884C I/O \u7684\u65F6\u5019\uFF0C\u65E0\u6CD5\u5229\u7528\u5230\u5185\u6838\u7684\u4F18\u52BF\uFF0C\u9700\u8981\u9891\u7E41\u8FDB\u884C\u7528\u6237\u6001\u5230\u5185\u6838\u6001\u7684\u5207\u6362\u3002</p></li><li><p>\u7EBF\u7A0B\u95F4\u534F\u4F5C\u6210\u672C\u9AD8\uFF1A\u8BBE\u60F3\u4E24\u4E2A\u7EBF\u7A0B\u9700\u8981\u901A\u4FE1\uFF0C\u901A\u4FE1\u9700\u8981 I/O\uFF0CI/O \u9700\u8981\u7CFB\u7EDF\u8C03\u7528\uFF0C\u56E0\u6B64\u7528\u6237\u6001\u7EBF\u7A0B\u9700\u8981\u989D\u5916\u7684\u7CFB\u7EDF\u8C03\u7528\u6210\u672C\u3002</p></li><li><p>\u65E0\u6CD5\u5229\u7528\u591A\u6838\u4F18\u52BF\uFF1A\u6BD4\u5982\u64CD\u4F5C\u7CFB\u7EDF\u8C03\u5EA6\u7684\u4ECD\u7136\u662F\u8FD9\u4E2A\u7EBF\u7A0B\u6240\u5C5E\u7684\u8FDB\u7A0B\uFF0C\u6240\u4EE5\u65E0\u8BBA\u6BCF\u6B21\u4E00\u4E2A\u8FDB\u7A0B\u6709\u591A\u5C11\u7528\u6237\u6001\u7684\u7EBF\u7A0B\uFF0C\u90FD\u53EA\u80FD\u5E76\u53D1\u6267\u884C\u4E00\u4E2A\u7EBF\u7A0B\uFF0C\u56E0\u6B64\u4E00\u4E2A\u8FDB\u7A0B\u7684\u591A\u4E2A\u7EBF\u7A0B\u65E0\u6CD5\u5229\u7528\u591A\u6838\u7684\u4F18\u52BF\u3002</p></li></ul><p>\u64CD\u4F5C\u7CFB\u7EDF\u65E0\u6CD5\u9488\u5BF9\u7EBF\u7A0B\u8C03\u5EA6\u8FDB\u884C\u4F18\u5316\uFF1A\u5F53\u4E00\u4E2A\u8FDB\u7A0B\u7684\u4E00\u4E2A\u7528\u6237\u6001\u7EBF\u7A0B\u963B\u585E\uFF08Block\uFF09\u4E86\uFF0C\u64CD\u4F5C\u7CFB\u7EDF\u65E0\u6CD5\u53CA\u65F6\u53D1\u73B0\u548C\u5904\u7406\u963B\u585E\u95EE\u9898\uFF0C\u5B83\u4E0D\u4F1A\u66F4\u6362\u6267\u884C\u5176\u4ED6\u7EBF\u7A0B\uFF0C\u4ECE\u800C\u9020\u6210\u8D44\u6E90\u6D6A\u8D39\u3002</p><h3 id="\u5185\u6838\u6001\u7EBF\u7A0B" tabindex="-1"><a class="header-anchor" href="#\u5185\u6838\u6001\u7EBF\u7A0B" aria-hidden="true">#</a> \u5185\u6838\u6001\u7EBF\u7A0B</h3><p>\u5185\u6838\u6001\u7EBF\u7A0B\u4E5F\u79F0\u4F5C\u5185\u6838\u7EA7\u7EBF\u7A0B\uFF08Kernel Level Thread\uFF09\uFF0C\u8FD9\u79CD\u7EBF\u7A0B\u6267\u884C\u5728\u5185\u6838\u6001\uFF0C\u53EF\u4EE5\u901A\u8FC7\u7CFB\u7EDF\u8C03\u7528\u521B\u9020\u4E00\u4E2A\u5185\u6838\u7EA7\u7EBF\u7A0B\u3002</p><p>\u5185\u6838\u7EA7\u7EBF\u7A0B\u6709\u5F88\u591A\u4F18\u52BF\uFF1A</p><ul><li><p>\u53EF\u4EE5\u5229\u7528\u591A\u6838 CPU \u4F18\u52BF\uFF1A\u5185\u6838\u62E5\u6709\u8F83\u9AD8\u6743\u9650\uFF0C\u56E0\u6B64\u53EF\u4EE5\u5728\u591A\u4E2A CPU \u6838\u5FC3\u4E0A\u6267\u884C\u5185\u6838\u7EBF\u7A0B\u3002</p></li><li><p>\u64CD\u4F5C\u7CFB\u7EDF\u7EA7\u4F18\u5316\uFF1A\u5185\u6838\u4E2D\u7684\u7EBF\u7A0B\u64CD\u4F5C I/O \u4E0D\u9700\u8981\u8FDB\u884C\u7CFB\u7EDF\u8C03\u7528\uFF1B\u4E00\u4E2A\u5185\u6838\u7EBF\u7A0B\u963B\u585E\u4E86\uFF0C\u53EF\u4EE5\u7ACB\u5373\u8BA9\u53E6\u4E00\u4E2A\u6267\u884C\u3002</p></li></ul><p>\u5F53\u7136\u5185\u6838\u7EBF\u7A0B\u4E5F\u6709\u4E00\u4E9B\u7F3A\u70B9\uFF1A</p><ul><li><p>\u521B\u5EFA\u6210\u672C\u9AD8\uFF1A\u521B\u5EFA\u7684\u65F6\u5019\u9700\u8981\u7CFB\u7EDF\u8C03\u7528\uFF0C\u4E5F\u5C31\u662F\u5207\u6362\u5230\u5185\u6838\u6001\u3002</p></li><li><p>\u6269\u5C55\u6027\u5DEE\uFF1A\u7531\u4E00\u4E2A\u5185\u6838\u7A0B\u5E8F\u7BA1\u7406\uFF0C\u4E0D\u53EF\u80FD\u6570\u91CF\u592A\u591A\u3002</p></li><li><p>\u5207\u6362\u6210\u672C\u8F83\u9AD8\uFF1A\u5207\u6362\u7684\u65F6\u5019\uFF0C\u4E5F\u540C\u6837\u5B58\u5728\u9700\u8981\u5185\u6838\u64CD\u4F5C\uFF0C\u9700\u8981\u5207\u6362\u5185\u6838\u6001\u3002</p></li></ul><p><strong>\u7528\u6237\u6001\u7EBF\u7A0B\u548C\u5185\u6838\u6001\u7EBF\u7A0B\u4E4B\u95F4\u7684\u6620\u5C04\u5173\u7CFB</strong></p><p>\u5982\u679C\u6709\u4E00\u4E2A\u7528\u6237\u6001\u7684\u8FDB\u7A0B\uFF0C\u5B83\u4E0B\u9762\u6709\u591A\u4E2A\u7EBF\u7A0B\uFF0C\u5982\u679C\u8FD9\u4E2A\u8FDB\u7A0B\u60F3\u8981\u6267\u884C\u4E0B\u9762\u7684\u67D0\u4E00\u4E2A\u7EBF\u7A0B\uFF0C\u5E94\u8BE5\u5982\u4F55\u505A\u5462\uFF1F</p><blockquote><p>\u8FD9\u65F6\uFF0C\u6BD4\u8F83\u5E38\u89C1\u7684\u4E00\u79CD\u65B9\u5F0F\uFF0C\u5C31\u662F\u5C06\u9700\u8981\u6267\u884C\u7684\u7A0B\u5E8F\uFF0C\u8BA9\u4E00\u4E2A\u5185\u6838\u7EBF\u7A0B\u53BB\u6267\u884C\u3002</p></blockquote><p>\u6BD5\u7ADF\uFF0C\u5185\u6838\u7EBF\u7A0B\u662F\u771F\u6B63\u7684\u7EBF\u7A0B\uFF0C\u56E0\u4E3A\u5B83\u4F1A\u5206\u914D\u5230 CPU \u7684\u6267\u884C\u8D44\u6E90\u3002</p><p>\u5982\u679C\u4E00\u4E2A\u8FDB\u7A0B\u6240\u6709\u7684\u7EBF\u7A0B\u90FD\u8981\u81EA\u5DF1\u8C03\u5EA6\uFF0C\u76F8\u5F53\u4E8E\u5728\u8FDB\u7A0B\u7684\u4E3B\u7EBF\u7A0B\u4E2D\u5B9E\u73B0\u5206\u65F6\u7B97\u6CD5\u8C03\u5EA6\u6BCF\u4E00\u4E2A\u7EBF\u7A0B\uFF0C\u4E5F\u5C31\u662F\u6240\u6709\u7EBF\u7A0B\u90FD\u7528\u64CD\u4F5C\u7CFB\u7EDF\u5206\u914D\u7ED9\u4E3B\u7EBF\u7A0B\u7684\u65F6\u95F4\u7247\u6BB5\u6267\u884C\u3002</p><blockquote><p>\u8FD9\u79CD\u505A\u6CD5\uFF0C\u76F8\u5F53\u4E8E\u64CD\u4F5C\u7CFB\u7EDF\u8C03\u5EA6\u8FDB\u7A0B\u7684\u4E3B\u7EBF\u7A0B\uFF1B\u8FDB\u7A0B\u7684\u4E3B\u7EBF\u7A0B\u8FDB\u884C\u4E8C\u7EA7\u8C03\u5EA6\uFF0C\u8C03\u5EA6\u81EA\u5DF1\u5185\u90E8\u7684\u7EBF\u7A0B\u3002</p></blockquote><p>\u8FD9\u6837\u64CD\u4F5C\u52A3\u52BF\u975E\u5E38\u660E\u663E\uFF0C\u6BD4\u5982\u65E0\u6CD5\u5229\u7528\u591A\u6838\u4F18\u52BF\uFF0C\u6BCF\u4E2A\u7EBF\u7A0B\u8C03\u5EA6\u5206\u914D\u5230\u7684\u65F6\u95F4\u8F83\u5C11\uFF0C\u800C\u4E14\u8FD9\u79CD\u7EBF\u7A0B\u5728\u963B\u585E\u573A\u666F\u4E0B\u4F1A\u76F4\u63A5\u4EA4\u51FA\u6574\u4E2A\u8FDB\u7A0B\u7684\u6267\u884C\u6743\u9650\u3002</p><p>\u7531\u6B64\u53EF\u89C1\uFF0C\u7528\u6237\u6001\u7EBF\u7A0B\u521B\u5EFA\u6210\u672C\u4F4E\uFF0C\u95EE\u9898\u660E\u663E\uFF0C\u4E0D\u53EF\u4EE5\u5229\u7528\u591A\u6838\u3002</p><p>\u5185\u6838\u6001\u7EBF\u7A0B\uFF0C\u521B\u5EFA\u6210\u672C\u9AD8\uFF0C\u53EF\u4EE5\u5229\u7528\u591A\u6838\uFF0C\u5207\u6362\u901F\u5EA6\u6162\u3002</p><p>\u56E0\u6B64\u901A\u5E38\u6211\u4EEC\u4F1A\u5728\u5185\u6838\u4E2D\u9884\u5148\u521B\u5EFA\u4E00\u4E9B\u7EBF\u7A0B\uFF0C\u5E76\u53CD\u590D\u5229\u7528\u8FD9\u4E9B\u7EBF\u7A0B\u3002</p><h3 id="\u534F\u7A0B" tabindex="-1"><a class="header-anchor" href="#\u534F\u7A0B" aria-hidden="true">#</a> \u534F\u7A0B</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/os-586071a1-3d5f-4873-963f-d47b8aeea594.png" alt=""></p><p>\u534F\u7A0B\uFF0C\u662F\u4E00\u79CD\u6BD4\u7EBF\u7A0B\u66F4\u52A0\u8F7B\u91CF\u7EA7\u7684\u5B58\u5728\uFF0C\u534F\u7A0B\u4E0D\u662F\u88AB\u64CD\u4F5C\u7CFB\u7EDF\u5185\u6838\u6240\u7BA1\u7406\uFF0C\u800C\u5B8C\u5168\u662F\u7531\u7A0B\u5E8F\u6240\u63A7\u5236\uFF08\u4E5F\u5C31\u662F\u5728\u7528\u6237\u6001\u6267\u884C\uFF09\u3002</p><p>\u8FD9\u6837\u5E26\u6765\u7684\u597D\u5904\u5C31\u662F\u6027\u80FD\u5F97\u5230\u4E86\u5F88\u5927\u7684\u63D0\u5347\uFF0C\u4E0D\u4F1A\u50CF\u7EBF\u7A0B\u5207\u6362\u90A3\u6837\u6D88\u8017\u8D44\u6E90\u3002</p><p><strong>\u5B50\u7A0B\u5E8F</strong></p><p>\u6216\u8005\u79F0\u4E3A\u51FD\u6570\uFF0C\u5728\u6240\u6709\u8BED\u8A00\u4E2D\u90FD\u662F\u5C42\u7EA7\u8C03\u7528\uFF0C\u6BD4\u5982A\u8C03\u7528B\uFF0CB\u5728\u6267\u884C\u8FC7\u7A0B\u4E2D\u53C8\u8C03\u7528\u4E86C\uFF0CC\u6267\u884C\u5B8C\u6BD5\u8FD4\u56DE\uFF0CB\u6267\u884C\u5B8C\u6BD5\u8FD4\u56DE\uFF0C\u6700\u540E\u662FA\u6267\u884C\u5B8C\u6BD5\u3002</p><p>\u6240\u4EE5\u5B50\u7A0B\u5E8F\u8C03\u7528\u662F\u901A\u8FC7\u6808\u5B9E\u73B0\u7684\uFF0C\u4E00\u4E2A\u7EBF\u7A0B\u5C31\u662F\u6267\u884C\u4E00\u4E2A\u5B50\u7A0B\u5E8F\u3002</p><p>\u5B50\u7A0B\u5E8F\u8C03\u7528\u603B\u662F\u4E00\u4E2A\u5165\u53E3\uFF0C\u4E00\u6B21\u8FD4\u56DE\uFF0C\u8C03\u7528\u987A\u5E8F\u662F\u660E\u786E\u7684\u3002</p><p><strong>\u534F\u7A0B\u7684\u7279\u70B9\u5728\u4E8E\u662F\u4E00\u4E2A\u7EBF\u7A0B\u6267\u884C\uFF0C\u90A3\u548C\u591A\u7EBF\u7A0B\u6BD4\uFF0C\u534F\u7A0B\u6709\u4F55\u4F18\u52BF\uFF1F</strong></p><ul><li>\u6781\u9AD8\u7684\u6267\u884C\u6548\u7387\uFF1A\u56E0\u4E3A\u5B50\u7A0B\u5E8F\u5207\u6362\u4E0D\u662F\u7EBF\u7A0B\u5207\u6362\uFF0C\u800C\u662F\u7531\u7A0B\u5E8F\u81EA\u8EAB\u63A7\u5236\uFF0C\u56E0\u6B64\uFF0C\u6CA1\u6709\u7EBF\u7A0B\u5207\u6362\u7684\u5F00\u9500\uFF0C\u548C\u591A\u7EBF\u7A0B\u6BD4\uFF0C\u7EBF\u7A0B\u6570\u91CF\u8D8A\u591A\uFF0C\u534F\u7A0B\u7684\u6027\u80FD\u4F18\u52BF\u5C31\u8D8A\u660E\u663E\uFF1B</li><li>\u4E0D\u9700\u8981\u591A\u7EBF\u7A0B\u7684\u9501\u673A\u5236\uFF1A\u56E0\u4E3A\u53EA\u6709\u4E00\u4E2A\u7EBF\u7A0B\uFF0C\u4E5F\u4E0D\u5B58\u5728\u540C\u65F6\u5199\u53D8\u91CF\u51B2\u7A81\uFF0C\u5728\u534F\u7A0B\u4E2D\u63A7\u5236\u5171\u4EAB\u8D44\u6E90\u4E0D\u52A0\u9501\uFF0C\u53EA\u9700\u8981\u5224\u65AD\u72B6\u6001\u5C31\u597D\u4E86\uFF0C\u6240\u4EE5\u6267\u884C\u6548\u7387\u6BD4\u591A\u7EBF\u7A0B\u9AD8\u5F88\u591A\u3002</li></ul><h3 id="\u7EBF\u7A0B\u5B89\u5168" tabindex="-1"><a class="header-anchor" href="#\u7EBF\u7A0B\u5B89\u5168" aria-hidden="true">#</a> \u7EBF\u7A0B\u5B89\u5168</h3><p>\u5982\u679C\u4F60\u7684\u4EE3\u7801\u6240\u5728\u7684\u8FDB\u7A0B\u4E2D\u6709\u591A\u4E2A\u7EBF\u7A0B\u5728\u540C\u65F6\u8FD0\u884C\uFF0C\u800C\u8FD9\u4E9B\u7EBF\u7A0B\u53EF\u80FD\u4F1A\u540C\u65F6\u8FD0\u884C\u8FD9\u6BB5\u4EE3\u7801\u3002</p><p>\u5982\u679C\u6BCF\u6B21\u8FD0\u884C\u7ED3\u679C\u548C\u5355\u7EBF\u7A0B\u8FD0\u884C\u7684\u7ED3\u679C\u662F\u4E00\u6837\u7684\uFF0C\u800C\u4E14\u5176\u4ED6\u7684\u53D8\u91CF\u7684\u503C\u4E5F\u548C\u9884\u671F\u7684\u662F\u4E00\u6837\u7684\uFF0C\u5C31\u662F\u7EBF\u7A0B\u5B89\u5168\u7684\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><h2 id="\u8FDB\u7A0B" tabindex="-1"><a class="header-anchor" href="#\u8FDB\u7A0B" aria-hidden="true">#</a> \u8FDB\u7A0B</h2><p>\u5728\u7CFB\u7EDF\u4E2D\u6B63\u5728\u8FD0\u884C\u7684\u4E00\u4E2A\u5E94\u7528\u7A0B\u5E8F\uFF1B\u7A0B\u5E8F\u4E00\u65E6\u8FD0\u884C\u5C31\u662F\u8FDB\u7A0B\uFF1B\u662F\u8D44\u6E90\u5206\u914D\u7684\u6700\u5C0F\u5355\u4F4D\u3002</p><p>\u5728\u64CD\u4F5C\u7CFB\u7EDF\u4E2D\u80FD\u540C\u65F6\u8FD0\u884C\u591A\u4E2A\u8FDB\u7A0B\uFF1B</p><p>\u5F00\u673A\u7684\u65F6\u5019\uFF0C\u78C1\u76D8\u7684\u5185\u6838\u955C\u50CF\u88AB\u5BFC\u5165\u5185\u5B58\u4F5C\u4E3A\u4E00\u4E2A\u6267\u884C\u526F\u672C\uFF0C\u6210\u4E3A\u5185\u6838\u8FDB\u7A0B\u3002</p><p>\u8FDB\u7A0B\u53EF\u4EE5\u5206\u6210<strong>\u7528\u6237\u6001\u8FDB\u7A0B\u548C\u5185\u6838\u6001\u8FDB\u7A0B</strong>\u4E24\u7C7B\uFF0C\u7528\u6237\u6001\u8FDB\u7A0B\u901A\u5E38\u662F\u5E94\u7528\u7A0B\u5E8F\u7684\u526F\u672C\uFF0C\u5185\u6838\u6001\u8FDB\u7A0B\u5C31\u662F\u5185\u6838\u672C\u8EAB\u7684\u8FDB\u7A0B\u3002</p><p>\u5982\u679C\u7528\u6237\u6001\u8FDB\u7A0B\u9700\u8981\u7533\u8BF7\u8D44\u6E90\uFF0C\u6BD4\u5982\u5185\u5B58\uFF0C\u53EF\u4EE5\u901A\u8FC7\u7CFB\u7EDF\u8C03\u7528\u5411\u5185\u6838\u7533\u8BF7\u3002</p><p>\u6BCF\u4E2A\u8FDB\u7A0B\u90FD\u6709\u72EC\u7ACB\u7684\u5185\u5B58\u7A7A\u95F4\uFF0C\u5B58\u653E\u4EE3\u7801\u548C\u6570\u636E\u6BB5\u7B49\uFF0C\u7A0B\u5E8F\u4E4B\u95F4\u7684\u5207\u6362\u4F1A\u6709\u8F83\u5927\u7684\u5F00\u9500\uFF1B</p><p><strong>\u5206\u65F6\u548C\u8C03\u5EA6</strong></p><p>\u6BCF\u4E2A\u8FDB\u7A0B\u5728\u6267\u884C\u65F6\u90FD\u4F1A\u83B7\u5F97\u64CD\u4F5C\u7CFB\u7EDF\u5206\u914D\u7684\u4E00\u4E2A\u65F6\u95F4\u7247\u6BB5\uFF0C\u5982\u679C\u8D85\u51FA\u8FD9\u4E2A\u65F6\u95F4\uFF0C\u5C31\u4F1A\u8F6E\u5230\u4E0B\u4E00\u4E2A\u8FDB\u7A0B\uFF08\u7EBF\u7A0B\uFF09\u6267\u884C\u3002</p><blockquote><p>\u6CE8\u610F\uFF0C\u73B0\u4EE3\u64CD\u4F5C\u7CFB\u7EDF\u90FD\u662F\u76F4\u63A5\u8C03\u5EA6\u7EBF\u7A0B\uFF0C\u4E0D\u4F1A\u8C03\u5EA6\u8FDB\u7A0B\u3002</p></blockquote><p><strong>\u5206\u914D\u65F6\u95F4\u7247\u6BB5</strong></p><p>\u5982\u4E0B\u56FE\u6240\u793A\uFF0C\u8FDB\u7A0B 1 \u9700\u8981 2 \u4E2A\u65F6\u95F4\u7247\u6BB5\uFF0C\u8FDB\u7A0B 2 \u53EA\u6709 1 \u4E2A\u65F6\u95F4\u7247\u6BB5\uFF0C\u8FDB\u7A0B 3 \u9700\u8981 3 \u4E2A\u65F6\u95F4\u7247\u6BB5\u3002</p><p>\u56E0\u6B64\u5F53\u8FDB\u7A0B 1 \u6267\u884C\u5230\u4E00\u534A\u65F6\uFF0C\u4F1A\u5148\u6302\u8D77\uFF0C\u7136\u540E\u8FDB\u7A0B 2 \u5F00\u59CB\u6267\u884C\uFF1B\u8FDB\u7A0B 2 \u4E00\u6B21\u53EF\u4EE5\u6267\u884C\u5B8C\uFF0C\u7136\u540E\u8FDB\u7A0B 3 \u5F00\u59CB\u6267\u884C\uFF0C\u4E0D\u8FC7\u8FDB\u7A0B 3 \u4E00\u6B21\u6267\u884C\u4E0D\u5B8C\uFF0C\u5728\u6267\u884C\u4E86 1 \u4E2A\u65F6\u95F4\u7247\u6BB5\u540E\uFF0C\u8FDB\u7A0B 1 \u5F00\u59CB\u6267\u884C\uFF1B\u5C31\u8FD9\u6837\u5982\u6B64\u5468\u800C\u590D\u59CB\uFF0C\u8FD9\u4E2A\u5C31\u662F\u5206\u65F6\u6280\u672F\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/os-606eb7bd-e9e1-457a-bf61-66b152c5ada5.png" alt=""></p><h3 id="\u521B\u5EFA\u8FDB\u7A0B" tabindex="-1"><a class="header-anchor" href="#\u521B\u5EFA\u8FDB\u7A0B" aria-hidden="true">#</a> \u521B\u5EFA\u8FDB\u7A0B</h3><p>\u7528\u6237\u60F3\u8981\u521B\u5EFA\u4E00\u4E2A\u8FDB\u7A0B\uFF0C\u6700\u76F4\u63A5\u7684\u65B9\u6CD5\u5C31\u662F\u4ECE\u547D\u4EE4\u884C\u6267\u884C\u4E00\u4E2A\u7A0B\u5E8F\uFF0C\u6216\u8005\u53CC\u51FB\u6253\u5F00\u4E00\u4E2A\u5E94\u7528\uFF0C\u4F46\u5BF9\u4E8E\u7A0B\u5E8F\u5458\u800C\u8A00\uFF0C\u663E\u7136\u9700\u8981\u66F4\u597D\u7684\u8BBE\u8BA1\u3002</p><p>\u9996\u5148\uFF0C\u5E94\u8BE5\u6709 API \u6253\u5F00\u5E94\u7528\uFF0C\u6BD4\u5982\u53EF\u4EE5\u901A\u8FC7\u51FD\u6570\u6253\u5F00\u67D0\u4E2A\u5E94\u7528\uFF1B</p><p>\u53E6\u4E00\u65B9\u9762\uFF0C\u5982\u679C\u7A0B\u5E8F\u5458\u5E0C\u671B\u6267\u884C\u5B8C\u4E00\u6BB5\u4EE3\u4EF7\u6602\u8D35\u7684\u521D\u59CB\u5316\u8FC7\u7A0B\u540E\uFF0C\u5C06\u5F53\u524D\u7A0B\u5E8F\u7684\u72B6\u6001\u590D\u5236\u597D\u51E0\u4EFD\uFF0C\u53D8\u6210\u4E00\u4E2A\u4E2A\u5355\u72EC\u6267\u884C\u7684\u8FDB\u7A0B\uFF0C\u90A3\u4E48\u64CD\u4F5C\u7CFB\u7EDF\u63D0\u4F9B\u4E86 fork \u6307\u4EE4\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/os-85a86f1b-eeff-401e-8bfe-19e5509e2a53.png" alt=""></p><p>\u4E5F\u5C31\u662F\u8BF4\uFF0C\u6BCF\u6B21 fork \u4F1A\u591A\u521B\u9020\u4E00\u4E2A\u514B\u9686\u7684\u8FDB\u7A0B\uFF0C\u8FD9\u4E2A\u514B\u9686\u7684\u8FDB\u7A0B\uFF0C\u6240\u6709\u72B6\u6001\u90FD\u548C\u539F\u6765\u7684\u8FDB\u7A0B\u4E00\u6837\uFF0C\u4F46\u662F\u4F1A\u6709\u81EA\u5DF1\u7684\u5730\u5740\u7A7A\u95F4\u3002</p><p>\u5982\u679C\u8981\u521B\u9020 2 \u4E2A\u514B\u9686\u8FDB\u7A0B\uFF0C\u5C31\u8981 fork \u4E24\u6B21\u3002</p><blockquote><p>\u90A3\u5982\u679C\u6211\u5C31\u662F\u60F3\u542F\u52A8\u4E00\u4E2A\u65B0\u7684\u7A0B\u5E8F\u5462\uFF1F</p></blockquote><p>\u64CD\u4F5C\u7CFB\u7EDF\u63D0\u4F9B\u4E86\u542F\u52A8\u65B0\u7A0B\u5E8F\u7684 API\u3002</p><p>\u5982\u679C\u6211\u5C31\u662F\u60F3\u7528\u4E00\u4E2A\u65B0\u8FDB\u7A0B\u6267\u884C\u4E00\u5C0F\u6BB5\u7A0B\u5E8F\uFF0C\u6BD4\u5982\u8BF4\u6BCF\u6B21\u670D\u52A1\u7AEF\u6536\u5230\u5BA2\u6237\u7AEF\u7684\u8BF7\u6C42\u65F6\uFF0C\u6211\u90FD\u60F3\u7528\u4E00\u4E2A\u8FDB\u7A0B\u53BB\u5904\u7406\u8FD9\u4E2A\u8BF7\u6C42\u3002</p><p>\u5982\u679C\u662F\u8FD9\u79CD\u60C5\u51B5\uFF0C\u5EFA\u8BAE\u4F60\u4E0D\u8981\u5355\u72EC\u542F\u52A8\u8FDB\u7A0B\uFF0C\u800C\u662F\u4F7F\u7528\u7EBF\u7A0B\u3002</p><p>\u56E0\u4E3A\u8FDB\u7A0B\u7684\u521B\u5EFA\u6210\u672C\u5B9E\u5728\u592A\u9AD8\u4E86\uFF0C\u56E0\u6B64\u4E0D\u5EFA\u8BAE\u7528\u6765\u505A\u8FD9\u6837\u7684\u4E8B\u60C5\uFF1A\u8981\u521B\u5EFA\u6761\u76EE\u3001\u8981\u5206\u914D\u5185\u5B58\uFF0C\u7279\u522B\u662F\u8FD8\u8981\u5728\u5185\u5B58\u4E2D\u5F62\u6210\u4E00\u4E2A\u4E2A\u6BB5\uFF0C\u5206\u6210\u4E0D\u540C\u7684\u533A\u57DF\u3002\u6240\u4EE5\u901A\u5E38\uFF0C\u6211\u4EEC\u66F4\u503E\u5411\u4E8E\u591A\u521B\u5EFA\u7EBF\u7A0B\u3002</p><p>\u4E0D\u540C\u7A0B\u5E8F\u8BED\u8A00\u4F1A\u81EA\u5DF1\u63D0\u4F9B\u521B\u5EFA\u7EBF\u7A0B\u7684 API\uFF0C\u6BD4\u5982 Java \u6709 Thread \u7C7B\uFF1Bgo \u6709 go-routine\uFF08\u6CE8\u610F\u4E0D\u662F\u534F\u7A0B\uFF0C\u662F\u7EBF\u7A0B\uFF09\u3002</p><h3 id="\u8FDB\u7A0B\u72B6\u6001" tabindex="-1"><a class="header-anchor" href="#\u8FDB\u7A0B\u72B6\u6001" aria-hidden="true">#</a> \u8FDB\u7A0B\u72B6\u6001</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/os-5f202fa5-0922-4b41-b4f2-f8a9af37a176.png" alt=""></p><p><strong>\u521B\u5EFA\u72B6\u6001</strong></p><p>\u8FDB\u7A0B\u7531\u521B\u5EFA\u800C\u4EA7\u751F\uFF0C\u521B\u5EFA\u8FDB\u7A0B\u662F\u4E00\u4E2A\u975E\u5E38\u590D\u6742\u7684\u8FC7\u7A0B\uFF0C\u4E00\u822C\u9700\u8981\u901A\u8FC7\u591A\u4E2A\u6B65\u9AA4\u624D\u80FD\u5B8C\u6210\uFF1A\u5982\u9996\u5148\u7531\u8FDB\u7A0B\u7533\u8BF7\u4E00\u4E2A\u7A7A\u767D\u7684\u8FDB\u7A0B\u63A7\u5236\u5757(PCB)\uFF0C\u5E76\u5411PCB\u4E2D\u586B\u5199\u7528\u4E8E\u63A7\u5236\u548C\u7BA1\u7406\u8FDB\u7A0B\u7684\u4FE1\u606F\uFF1B\u7136\u540E\u4E3A\u8BE5\u8FDB\u7A0B\u5206\u914D\u8FD0\u884C\u65F6\u6240\u5FC5\u987B\u7684\u8D44\u6E90\uFF1B\u6700\u540E\uFF0C\u628A\u8BE5\u8FDB\u7A0B\u8F6C\u5165\u5C31\u7EEA\u72B6\u6001\u5E76\u63D2\u5165\u5230\u5C31\u7EEA\u961F\u5217\u4E2D</p><p><strong>\u5C31\u7EEA\u72B6\u6001</strong></p><p>\u8FD9\u662F\u6307\u8FDB\u7A0B\u5DF2\u7ECF\u51C6\u5907\u597D\u8FD0\u884C\u7684\u72B6\u6001\uFF0C\u5373\u8FDB\u7A0B\u5DF2\u5206\u914D\u5230\u9664CPU\u4EE5\u5916\u6240\u6709\u7684\u5FC5\u8981\u8D44\u6E90\u540E\uFF0C\u53EA\u8981\u518D\u83B7\u5F97CPU\uFF0C\u4FBF\u53EF\u7ACB\u5373\u6267\u884C\uFF0C\u5982\u679C\u7CFB\u7EDF\u4E2D\u6709\u8BB8\u591A\u5904\u4E8E\u5C31\u7EEA\u72B6\u6001\u7684\u8FDB\u7A0B\uFF0C\u901A\u5E38\u5C06\u5B83\u4EEC\u6309\u7167\u4E00\u5B9A\u7684\u7B56\u7565\u6392\u6210\u4E00\u4E2A\u961F\u5217\uFF0C\u8BE5\u961F\u5217\u79F0\u4E3A\u5C31\u7EEA\u961F\u5217\uFF0C\u6709\u6267\u884C\u8D44\u683C\uFF0C\u6CA1\u6709\u6267\u884C\u6743\u7684\u8FDB\u7A0B</p><p><strong>\u8FD0\u884C\u72B6\u6001</strong></p><p>\u8FD9\u91CC\u6307\u8FDB\u7A0B\u5DF2\u7ECF\u83B7\u53D6CPU\uFF0C\u5176\u8FDB\u7A0B\u5904\u4E8E\u6B63\u5728\u6267\u884C\u7684\u72B6\u6001\u3002\u5BF9\u4EFB\u4F55\u4E00\u4E2A\u65F6\u523B\u800C\u8A00\uFF0C\u5728\u5355\u5904\u7406\u673A\u7684\u7CFB\u7EDF\u4E2D\uFF0C\u53EA\u6709\u4E00\u4E2A\u8FDB\u7A0B\u5904\u4E8E\u6267\u884C\u72B6\u6001\u800C\u5728\u591A\u5904\u7406\u673A\u7CFB\u7EDF\u4E2D\uFF0C\u6709\u591A\u4E2A\u8FDB\u7A0B\u5904\u4E8E\u6267\u884C\u72B6\u6001\uFF0C\u65E2\u6709\u6267\u884C\u8D44\u683C\uFF0C\u53C8\u6709\u6267\u884C\u6743\u7684\u8FDB\u7A0B</p><p><strong>\u963B\u585E\u72B6\u6001</strong></p><p>\u8FD9\u91CC\u662F\u6307\u6B63\u5728\u6267\u884C\u7684\u8FDB\u7A0B\u7531\u4E8E\u53D1\u751F\u67D0\u4E8B\u4EF6\uFF08\u5982I/O\u8BF7\u6C42\u3001\u7533\u8BF7\u7F13\u51B2\u533A\u5931\u8D25\u7B49\uFF09\u6682\u65F6\u65E0\u6CD5\u7EE7\u7EED\u6267\u884C\u7684\u72B6\u6001\uFF0C\u5373\u8FDB\u7A0B\u6267\u884C\u53D7\u5230\u963B\u585E\uFF0C\u6B64\u65F6\u5F15\u8D77\u8FDB\u7A0B\u8C03\u5EA6\uFF0C\u64CD\u4F5C\u7CFB\u7EDF\u628A\u5904\u7406\u673A\u5206\u914D\u7ED9\u53E6\u5916\u4E00\u4E2A\u5C31\u7EEA\u7684\u8FDB\u7A0B\uFF0C\u800C\u8BA9\u53D7\u963B\u7684\u8FDB\u7A0B\u5904\u4E8E\u6682\u505C\u7684\u72B6\u6001\uFF0C\u4E00\u822C\u5C06\u8FD9\u4E2A\u6682\u505C\u72B6\u6001\u79F0\u4E3A\u963B\u585E\u72B6\u6001</p><p><strong>\u7EC8\u6B62\u72B6\u6001</strong></p><h3 id="\u8FDB\u7A0B\u95F4\u901A\u4FE1ipc" tabindex="-1"><a class="header-anchor" href="#\u8FDB\u7A0B\u95F4\u901A\u4FE1ipc" aria-hidden="true">#</a> \u8FDB\u7A0B\u95F4\u901A\u4FE1IPC</h3><p>\u6BCF\u4E2A\u8FDB\u7A0B\u5404\u81EA\u6709\u4E0D\u540C\u7684\u7528\u6237\u5730\u5740\u7A7A\u95F4\uFF0C\u4EFB\u4F55\u4E00\u4E2A\u8FDB\u7A0B\u7684\u5168\u5C40\u53D8\u91CF\u5728\u53E6\u4E00\u4E2A\u8FDB\u7A0B\u4E2D\u90FD\u770B\u4E0D\u5230\uFF0C\u6240\u4EE5\u8FDB\u7A0B\u4E4B\u95F4\u8981\u4EA4\u6362\u6570\u636E\u5FC5\u987B\u901A\u8FC7\u5185\u6838\uFF0C\u5728\u5185\u6838\u4E2D\u5F00\u8F9F\u4E00\u5757\u7F13\u51B2\u533A\uFF0C\u8FDB\u7A0B1\u628A\u6570\u636E\u4ECE\u7528\u6237\u7A7A\u95F4\u62F7\u5230\u5185\u6838\u7F13\u51B2\u533A\uFF0C\u8FDB\u7A0B2\u518D\u4ECE\u5185\u6838\u7F13\u51B2\u533A\u628A\u6570\u636E\u8BFB\u8D70\uFF0C\u5185\u6838\u63D0\u4F9B\u7684\u8FD9\u79CD\u673A\u5236\u79F0\u4E3A\u8FDB\u7A0B\u95F4\u901A\u4FE1</p><p><strong>\u7BA1\u9053/\u533F\u540D\u7BA1\u9053</strong></p><p>\u7BA1\u9053\u662F\u534A\u53CC\u5DE5\u7684\uFF0C\u6570\u636E\u53EA\u80FD\u5411\u4E00\u4E2A\u65B9\u5411\u6D41\u52A8\uFF1B\u9700\u8981\u53CC\u65B9\u901A\u4FE1\u65F6\uFF0C\u9700\u8981\u5EFA\u7ACB\u8D77\u4E24\u4E2A\u7BA1\u9053\u3002</p><ul><li><p>\u53EA\u80FD\u7528\u4E8E\u7236\u5B50\u8FDB\u7A0B\u6216\u8005\u5144\u5F1F\u8FDB\u7A0B\u4E4B\u95F4(\u5177\u6709\u4EB2\u7F18\u5173\u7CFB\u7684\u8FDB\u7A0B);</p></li><li><p>\u5355\u72EC\u6784\u6210\u4E00\u79CD\u72EC\u7ACB\u7684\u6587\u4EF6\u7CFB\u7EDF\uFF1A\u7BA1\u9053\u5BF9\u4E8E\u7BA1\u9053\u4E24\u7AEF\u7684\u8FDB\u7A0B\u800C\u8A00\uFF0C\u5C31\u662F\u4E00\u4E2A\u6587\u4EF6\uFF0C\u4F46\u5B83\u4E0D\u662F\u666E\u901A\u7684\u6587\u4EF6\uFF0C\u5B83\u4E0D\u5C5E\u4E8E\u67D0\u79CD\u6587\u4EF6\u7CFB\u7EDF\uFF0C\u800C\u662F\u81EA\u7ACB\u95E8\u6237\uFF0C\u5355\u72EC\u6784\u6210\u4E00\u79CD\u6587\u4EF6\u7CFB\u7EDF\uFF0C\u5E76\u4E14\u53EA\u5B58\u5728\u4E0E\u5185\u5B58\u4E2D\u3002</p></li><li><p>\u6570\u636E\u7684\u8BFB\u51FA\u548C\u5199\u5165\uFF1A\u4E00\u4E2A\u8FDB\u7A0B\u5411\u7BA1\u9053\u4E2D\u5199\u7684\u5185\u5BB9\u88AB\u7BA1\u9053\u53E6\u4E00\u7AEF\u7684\u8FDB\u7A0B\u8BFB\u51FA\uFF0C\u5199\u5165\u7684\u5185\u5BB9\u6BCF\u6B21\u90FD\u6DFB\u52A0\u5728\u7BA1\u9053\u7F13\u51B2\u533A\u7684\u672B\u5C3E\uFF0C\u5E76\u4E14\u6BCF\u6B21\u90FD\u662F\u4ECE\u7F13\u51B2\u533A\u7684\u5934\u90E8\u8BFB\u51FA\u6570\u636E\u3002</p></li></ul><p><strong>\u6709\u540D\u7BA1\u9053(FIFO)</strong></p><p>\u533F\u540D\u7BA1\u9053\uFF0C\u7531\u4E8E\u6CA1\u6709\u540D\u5B57\uFF0C\u53EA\u80FD\u7528\u4E8E\u4EB2\u7F18\u5173\u7CFB\u7684\u8FDB\u7A0B\u95F4\u901A\u4FE1\u3002</p><p>\u4E3A\u4E86\u514B\u670D\u8FD9\u4E2A\u7F3A\u70B9\uFF0C\u63D0\u51FA\u4E86\u6709\u540D\u7BA1\u9053(FIFO)\u3002</p><p>\u6709\u540D\u7BA1\u9053\u4E0D\u540C\u4E8E\u533F\u540D\u7BA1\u9053\u4E4B\u5904\u5728\u4E8E\u5B83\u63D0\u4F9B\u4E86\u4E00\u4E2A\u8DEF\u5F84\u540D\u4E0E\u4E4B\u5173\u8054\uFF0C\u4EE5\u6709\u540D\u7BA1\u9053\u7684\u6587\u4EF6\u5F62\u5F0F\u5B58\u5728\u4E8E\u6587\u4EF6\u7CFB\u7EDF\u4E2D\uFF0C\u8FD9\u6837\uFF0C\u5373\u4F7F\u4E0E\u6709\u540D\u7BA1\u9053\u7684\u521B\u5EFA\u8FDB\u7A0B\u4E0D\u5B58\u5728\u4EB2\u7F18\u5173\u7CFB\u7684\u8FDB\u7A0B\uFF0C\u53EA\u8981\u53EF\u4EE5\u8BBF\u95EE\u8BE5\u8DEF\u5F84\uFF0C\u5C31\u80FD\u591F\u5F7C\u6B64\u901A\u8FC7\u6709\u540D\u7BA1\u9053\u76F8\u4E92\u901A\u4FE1\uFF0C\u56E0\u6B64\uFF0C\u901A\u8FC7\u6709\u540D\u7BA1\u9053\u4E0D\u76F8\u5173\u7684\u8FDB\u7A0B\u4E5F\u80FD\u4EA4\u6362\u6570\u636E\u3002</p><p><strong>\u4FE1\u53F7</strong></p><p>\u4FE1\u53F7\u662FLinux\u7CFB\u7EDF\u4E2D\u7528\u4E8E\u8FDB\u7A0B\u95F4\u4E92\u76F8\u901A\u4FE1\u6216\u8005\u64CD\u4F5C\u7684\u4E00\u79CD\u673A\u5236\uFF0C\u4FE1\u53F7\u53EF\u4EE5\u5728\u4EFB\u4F55\u65F6\u5019\u53D1\u7ED9\u67D0\u4E00\u8FDB\u7A0B\uFF0C\u800C\u65E0\u9700\u77E5\u9053\u8BE5\u8FDB\u7A0B\u7684\u72B6\u6001\u3002</p><p>\u5982\u679C\u8BE5\u8FDB\u7A0B\u5F53\u524D\u5E76\u672A\u5904\u4E8E\u6267\u884C\u72B6\u6001\uFF0C\u5219\u8BE5\u4FE1\u53F7\u5C31\u6709\u5185\u6838\u4FDD\u5B58\u8D77\u6765\uFF0C\u77E5\u9053\u8BE5\u8FDB\u7A0B\u56DE\u590D\u6267\u884C\u5E76\u4F20\u9012\u7ED9\u5B83\u4E3A\u6B62\u3002</p><p>\u5982\u679C\u4E00\u4E2A\u4FE1\u53F7\u88AB\u8FDB\u7A0B\u8BBE\u7F6E\u4E3A\u963B\u585E\uFF0C\u5219\u8BE5\u4FE1\u53F7\u7684\u4F20\u9012\u88AB\u5EF6\u8FDF\uFF0C\u76F4\u5230\u5176\u963B\u585E\u88AB\u53D6\u6D88\u662F\u624D\u88AB\u4F20\u9012\u7ED9\u8FDB\u7A0B\u3002</p><p><strong>\u6D88\u606F\u961F\u5217</strong></p><p>\u6D88\u606F\u961F\u5217\u662F\u5B58\u653E\u5728\u5185\u6838\u4E2D\u7684\u6D88\u606F\u94FE\u8868\uFF0C\u6BCF\u4E2A\u6D88\u606F\u961F\u5217\u7531\u6D88\u606F\u961F\u5217\u6807\u8BC6\u7B26\u8868\u793A\u3002</p><p>\u4E0E\u7BA1\u9053\uFF08\u65E0\u540D\u7BA1\u9053\uFF1A\u53EA\u5B58\u5728\u4E8E\u5185\u5B58\u4E2D\u7684\u6587\u4EF6\uFF1B\u547D\u540D\u7BA1\u9053\uFF1A\u5B58\u5728\u4E8E\u5B9E\u9645\u7684\u78C1\u76D8\u4ECB\u8D28\u6216\u8005\u6587\u4EF6\u7CFB\u7EDF\uFF09\u4E0D\u540C\u7684\u662F\u6D88\u606F\u961F\u5217\u5B58\u653E\u5728\u5185\u6838\u4E2D\uFF0C\u53EA\u6709\u5728\u5185\u6838\u91CD\u542F(\u5373\u64CD\u4F5C\u7CFB\u7EDF\u91CD\u542F)\u6216\u8005\u663E\u793A\u5730\u5220\u9664\u4E00\u4E2A\u6D88\u606F\u961F\u5217\u65F6\uFF0C\u8BE5\u6D88\u606F\u961F\u5217\u624D\u4F1A\u88AB\u771F\u6B63\u7684\u5220\u9664\u3002</p><p>\u53E6\u5916\u4E0E\u7BA1\u9053\u4E0D\u540C\u7684\u662F\uFF0C\u6D88\u606F\u961F\u5217\u5728\u67D0\u4E2A\u8FDB\u7A0B\u5F80\u4E00\u4E2A\u961F\u5217\u5199\u5165\u6D88\u606F\u4E4B\u524D\uFF0C\u5E76\u4E0D\u9700\u8981\u53E6\u5916\u67D0\u4E2A\u8FDB\u7A0B\u5728\u8BE5\u961F\u5217\u4E0A\u7B49\u5F85\u6D88\u606F\u7684\u5230\u8FBE</p><p><strong>\u5171\u4EAB\u5185\u5B58</strong></p><p>\u4F7F\u5F97\u591A\u4E2A\u8FDB\u7A0B\u53EF\u4EE5\u76F4\u63A5\u8BFB\u5199\u540C\u4E00\u5757\u5185\u5B58\u7A7A\u95F4\uFF0C\u662F\u6700\u5FEB\u7684\u53EF\u7528IPC\u5F62\u5F0F\uFF0C\u662F\u9488\u5BF9\u5176\u4ED6\u901A\u4FE1\u673A\u5236\u8FD0\u884C\u6548\u7387\u8F83\u4F4E\u800C\u8BBE\u8BA1\u7684\u3002</p><p>\u4E3A\u4E86\u5728\u591A\u4E2A\u8FDB\u7A0B\u95F4\u4EA4\u6362\u4FE1\u606F\uFF0C\u5185\u6838\u4E13\u95E8\u7559\u51FA\u4E86\u4E00\u5757\u5185\u5B58\u533A\uFF0C\u53EF\u4EE5\u7531\u9700\u8981\u8BBF\u95EE\u7684\u8FDB\u7A0B\u5C06\u5176\u6620\u5C04\u5230\u81EA\u5DF1\u7684\u79C1\u6709\u5730\u5740\u7A7A\u95F4\uFF0C\u8FDB\u7A0B\u5C31\u53EF\u4EE5\u76F4\u63A5\u8BFB\u5199\u8FD9\u4E00\u5757\u5185\u5B58\u800C\u4E0D\u9700\u8981\u8FDB\u884C\u6570\u636E\u7684\u62F7\u8D1D\uFF0C\u4ECE\u800C\u5927\u5927\u63D0\u9AD8\u6548\u7387\u3002</p><p>\u7531\u4E8E\u591A\u4E2A\u8FDB\u7A0B\u5171\u4EAB\u4E00\u6BB5\u5185\u5B58\uFF0C\u56E0\u6B64\u9700\u8981\u4F9D\u9760\u67D0\u79CD\u540C\u6B65\u673A\u5236\uFF08\u5982\u4FE1\u53F7\u91CF\uFF09\u6765\u8FBE\u5230\u8FDB\u7A0B\u95F4\u7684\u540C\u6B65\u53CA\u4E92\u65A5\u3002</p><p>\u5171\u4EAB\u5185\u5B58\u793A\u610F\u56FE\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/os-8644f82a-eda6-4abf-b86a-13c02e7af5fd.png" alt=""></p><p>\u4E00\u65E6\u8FD9\u6837\u7684\u5185\u5B58\u6620\u5C04\u5230\u5171\u4EAB\u5B83\u7684\u8FDB\u7A0B\u7684\u5730\u5740\u7A7A\u95F4\uFF0C\u8FD9\u4E9B\u8FDB\u7A0B\u95F4\u6570\u636E\u4F20\u9012\u4E0D\u518D\u6D89\u53CA\u5230\u5185\u6838\uFF0C\u6362\u53E5\u8BDD\u8BF4\u662F\u8FDB\u7A0B\u4E0D\u518D\u901A\u8FC7\u6267\u884C\u8FDB\u5165\u5185\u6838\u7684\u7CFB\u7EDF\u8C03\u7528\u6765\u4F20\u9012\u5F7C\u6B64\u7684\u6570\u636E\u3002</p><p><strong>\u4FE1\u53F7\u91CF</strong></p><p>\u4FE1\u53F7\u91CF\u662F\u4E00\u4E2A\u8BA1\u6570\u5668\uFF0C\u7528\u4E8E\u591A\u8FDB\u7A0B\u5BF9\u5171\u4EAB\u6570\u636E\u7684\u8BBF\u95EE\uFF0C\u4FE1\u53F7\u91CF\u7684\u610F\u56FE\u5728\u4E8E\u8FDB\u7A0B\u95F4\u540C\u6B65\u3002</p><p>\u4E3A\u4E86\u83B7\u5F97\u5171\u4EAB\u8D44\u6E90\uFF0C\u8FDB\u7A0B\u9700\u8981\u6267\u884C\u4E0B\u5217\u64CD\u4F5C\uFF1A</p><ol><li><p>\u521B\u5EFA\u4E00\u4E2A\u4FE1\u53F7\u91CF\uFF1A\u8FD9\u8981\u6C42\u8C03\u7528\u8005\u6307\u5B9A\u521D\u59CB\u503C\uFF0C\u5BF9\u4E8E\u4E8C\u503C\u4FE1\u53F7\u91CF\u6765\u8BF4\uFF0C\u5B83\u901A\u5E38\u662F1\uFF0C\u4E5F\u53EF\u662F0\u3002</p></li><li><p>\u7B49\u5F85\u4E00\u4E2A\u4FE1\u53F7\u91CF\uFF1A\u8BE5\u64CD\u4F5C\u4F1A\u6D4B\u8BD5\u8FD9\u4E2A\u4FE1\u53F7\u91CF\u7684\u503C\uFF0C\u5982\u679C\u5C0F\u4E8E0\uFF0C\u5C31\u963B\u585E\uFF0C\u4E5F\u79F0\u4E3AP\u64CD\u4F5C\u3002</p></li><li><p>\u6302\u51FA\u4E00\u4E2A\u4FE1\u53F7\u91CF\uFF1A\u8BE5\u64CD\u4F5C\u5C06\u4FE1\u53F7\u91CF\u7684\u503C\u52A01\uFF0C\u4E5F\u79F0\u4E3AV\u64CD\u4F5C\u3002</p></li></ol><p><strong>\u5957\u63A5\u5B57(Socket)</strong></p><p>\u5957\u63A5\u5B57\u662F\u4E00\u79CD\u901A\u4FE1\u673A\u5236\uFF0C\u51ED\u501F\u8FD9\u79CD\u673A\u5236\uFF0C\u5BA2\u6237/\u670D\u52A1\u5668\uFF08\u5373\u8981\u8FDB\u884C\u901A\u4FE1\u7684\u8FDB\u7A0B\uFF09\u7CFB\u7EDF\u7684\u5F00\u53D1\u5DE5\u4F5C\u65E2\u53EF\u4EE5\u5728\u672C\u5730\u5355\u673A\u4E0A\u8FDB\u884C\uFF0C\u4E5F\u53EF\u4EE5\u8DE8\u7F51\u7EDC\u8FDB\u884C\u3002\u4E5F\u5C31\u662F\u8BF4\u5B83\u53EF\u4EE5\u8BA9\u4E0D\u5728\u540C\u4E00\u53F0\u8BA1\u7B97\u673A\u4F46\u901A\u8FC7\u7F51\u7EDC\u8FDE\u63A5\u8BA1\u7B97\u673A\u4E0A\u7684\u8FDB\u7A0B\u8FDB\u884C\u901A\u4FE1\u3002</p><h3 id="\u4FE1\u53F7" tabindex="-1"><a class="header-anchor" href="#\u4FE1\u53F7" aria-hidden="true">#</a> \u4FE1\u53F7</h3><p>\u4FE1\u53F7\u662F\u8FDB\u7A0B\u95F4\u901A\u4FE1\u673A\u5236\u4E2D\u552F\u4E00\u7684\u5F02\u6B65\u901A\u4FE1\u673A\u5236\uFF0C\u53EF\u4EE5\u770B\u4F5C\u662F\u5F02\u6B65\u901A\u77E5\uFF0C\u901A\u77E5\u63A5\u6536\u4FE1\u53F7\u7684\u8FDB\u7A0B\u6709\u54EA\u4E9B\u4E8B\u60C5\u53D1\u751F\u4E86\u3002</p><p>\u4E5F\u53EF\u4EE5\u7B80\u5355\u7406\u89E3\u4E3A\u4FE1\u53F7\u662F\u67D0\u79CD\u5F62\u5F0F\u4E0A\u7684\u8F6F\u4E2D\u65AD</p><p>\u53EF\u8FD0\u884C<code>kill -l</code>\u67E5\u770BLinux\u652F\u6301\u7684\u4FE1\u53F7\u5217\u8868\uFF1A</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>kill -l
+import{_ as a}from"./plugin-vue_export-helper.21dcd24c.js";import{r as o,o as i,c as n,a as p,b as r,d as e,e as s}from"./app.615e41d8.js";const l={},d=e("\u4F5C\u8005\uFF1A\u6708\u4F34\u98DE\u9C7C\uFF0C\u8F6C\u8F7D\u94FE\u63A5\uFF1A"),c={href:"https://mp.weixin.qq.com/s/G9ZqwEMxjrG5LbgYwM5ACQ",target:"_blank",rel:"noopener noreferrer"},g=e("https://mp.weixin.qq.com/s/G9ZqwEMxjrG5LbgYwM5ACQ"),b=s(`<p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/os-5ad16ae7-059f-44f1-8236-697b203bb72e.png" alt=""></p><h2 id="\u8BA1\u7B97\u673A\u7ED3\u6784" tabindex="-1"><a class="header-anchor" href="#\u8BA1\u7B97\u673A\u7ED3\u6784" aria-hidden="true">#</a> \u8BA1\u7B97\u673A\u7ED3\u6784</h2><p>\u73B0\u4EE3\u8BA1\u7B97\u673A\u6A21\u578B\u662F\u57FA\u4E8E-<strong>\u51AF\u8BFA\u4F9D\u66FC\u8BA1\u7B97\u673A\u6A21\u578B</strong></p><p>\u8BA1\u7B97\u673A\u5728\u8FD0\u884C\u65F6\uFF0C\u5148\u4ECE\u5185\u5B58\u4E2D\u53D6\u51FA\u7B2C\u4E00\u6761\u6307\u4EE4\uFF0C\u901A\u8FC7\u63A7\u5236\u5668\u7684\u8BD1\u7801\uFF0C\u6309\u6307\u4EE4\u7684\u8981\u6C42\uFF0C\u4ECE\u5B58\u50A8\u5668\u4E2D\u53D6\u51FA\u6570\u636E\u8FDB\u884C\u6307\u5B9A\u7684\u8FD0\u7B97\u548C\u903B\u8F91\u64CD\u4F5C\u7B49\u52A0\u5DE5\uFF0C\u7136\u540E\u518D\u6309\u5730\u5740\u628A\u7ED3\u679C\u9001\u5230\u5185\u5B58\u4E2D\u53BB\uFF0C\u63A5\u4E0B\u6765\uFF0C\u518D\u53D6\u51FA\u7B2C\u4E8C\u6761\u6307\u4EE4\uFF0C\u5728\u63A7\u5236\u5668\u7684\u6307\u6325\u4E0B\u5B8C\u6210\u89C4\u5B9A\u64CD\u4F5C\uFF0C\u4F9D\u6B64\u8FDB\u884C\u4E0B\u53BB\u3002\u76F4\u81F3\u9047\u5230\u505C\u6B62\u6307\u4EE4</p><p>\u7A0B\u5E8F\u4E0E\u6570\u636E\u4E00\u6837\u5B58\u8D2E\uFF0C\u6309\u7A0B\u5E8F\u7F16\u6392\u7684\u987A\u5E8F\uFF0C\u4E00\u6B65\u4E00\u6B65\u5730\u53D6\u51FA\u6307\u4EE4\uFF0C\u81EA\u52A8\u5730\u5B8C\u6210\u6307\u4EE4\u89C4\u5B9A\u7684\u64CD\u4F5C\u662F\u8BA1\u7B97\u673A\u6700\u57FA\u672C\u7684\u5DE5\u4F5C\u6A21\u578B</p><p><strong>\u8BA1\u7B97\u673A\u4E94\u5927\u6838\u5FC3\u7EC4\u6210\u90E8\u5206</strong></p><p>\u63A7\u5236\u5668\uFF1A\u662F\u6574\u4E2A\u8BA1\u7B97\u673A\u7684\u4E2D\u67A2\u795E\u7ECF\uFF0C\u5176\u529F\u80FD\u662F\u5BF9\u7A0B\u5E8F\u89C4\u5B9A\u7684\u63A7\u5236\u4FE1\u606F\u8FDB\u884C\u89E3\u91CA\uFF0C\u6839\u636E\u5176\u8981\u6C42\u8FDB\u884C\u63A7\u5236\uFF0C\u8C03\u5EA6\u7A0B\u5E8F\u3001\u6570\u636E\u3001\u5730\u5740\uFF0C\u534F\u8C03\u8BA1\u7B97\u673A\u5404\u90E8\u5206\u5DE5\u4F5C\u53CA\u5185\u5B58\u4E0E\u5916\u8BBE\u7684\u8BBF\u95EE\u7B49\u3002</p><p>\u8FD0\u7B97\u5668\uFF1A\u8FD0\u7B97\u5668\u7684\u529F\u80FD\u662F\u5BF9\u6570\u636E\u8FDB\u884C\u5404\u79CD\u7B97\u672F\u8FD0\u7B97\u548C\u903B\u8F91\u8FD0\u7B97\uFF0C\u5373\u5BF9\u6570\u636E\u8FDB\u884C\u52A0\u5DE5\u5904\u7406\u3002</p><p>\u5B58\u50A8\u5668\uFF1A\u5B58\u50A8\u5668\u7684\u529F\u80FD\u662F\u5B58\u50A8\u7A0B\u5E8F\u3001\u6570\u636E\u548C\u5404\u79CD\u4FE1\u53F7\u3001\u547D\u4EE4\u7B49\u4FE1\u606F\uFF0C\u5E76\u5728\u9700\u8981\u65F6\u63D0\u4F9B\u8FD9\u4E9B\u4FE1\u606F\u3002</p><p>\u8F93\u5165\uFF1A\u8F93\u5165\u8BBE\u5907\u662F\u8BA1\u7B97\u673A\u7684\u91CD\u8981\u7EC4\u6210\u90E8\u5206\uFF0C\u8F93\u5165\u8BBE\u5907\u4E0E\u8F93\u51FA\u8BBE\u5907\u5408\u4F60\u4E3A\u5916\u90E8\u8BBE\u5907\uFF0C\u7B80\u79F0\u5916\u8BBE\uFF0C\u8F93\u5165\u8BBE\u5907\u7684\u4F5C\u7528\u662F\u5C06\u7A0B\u5E8F\u3001\u539F\u59CB\u6570\u636E\u3001\u6587\u5B57\u3001\u5B57\u7B26\u3001\u63A7\u5236\u547D\u4EE4\u6216\u73B0\u573A\u91C7\u96C6\u7684\u6570\u636E\u7B49\u4FE1\u606F\u8F93\u5165\u5230\u8BA1\u7B97\u673A\u3002</p><blockquote><p>\u5E38\u89C1\u7684\u8F93\u5165\u8BBE\u5907\u6709\u952E\u76D8\u3001\u9F20\u6807\u5668\u3001\u5149\u7535\u8F93\u5165\u673A\u3001\u78C1\u5E26\u673A\u3001\u78C1\u76D8\u673A\u3001\u5149\u76D8\u673A\u7B49\u3002</p></blockquote><p>\u8F93\u51FA\uFF1A\u8F93\u51FA\u8BBE\u5907\u4E0E\u8F93\u5165\u8BBE\u5907\u540C\u6837\u662F\u8BA1\u7B97\u673A\u7684\u91CD\u8981\u7EC4\u6210\u90E8\u5206\uFF0C\u5B83\u628A\u5916\u7B97\u673A\u7684\u4E2D\u95F4\u7ED3\u679C\u6216\u6700\u540E\u7ED3\u679C\u3001\u673A\u5185\u7684\u5404\u79CD\u6570\u636E\u7B26\u53F7\u53CA\u6587\u5B57\u6216\u5404\u79CD\u63A7\u5236\u4FE1\u53F7\u7B49\u4FE1\u606F\u8F93\u51FA\u51FA\u6765\uFF0C\u5FAE\u673A\u5E38\u7528\u7684\u8F93\u51FA\u8BBE\u5907\u6709\u663E\u793A\u7EC8\u7AEFCRT\u3001\u6253\u5370\u673A\u3001\u6FC0\u5149\u5370\u5B57\u673A\u3001\u7ED8\u56FE\u4EEA\u53CA\u78C1\u5E26\u3001\u5149\u76D8\u673A\u7B49\u3002</p><p><strong>\u8BA1\u7B97\u673A\u7ED3\u6784\u5206\u6210\u4EE5\u4E0B 5 \u4E2A\u90E8\u5206\uFF1A</strong></p><p>\u8F93\u5165\u8BBE\u5907\uFF1B\u8F93\u51FA\u8BBE\u5907\uFF1B\u5185\u5B58\uFF1B\u4E2D\u592E\u5904\u7406\u5668\uFF1B\u603B\u7EBF\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/os-eff4b87b-9091-443c-988b-721e9fd59d2f.png" alt=""></p><h3 id="\u5185\u5B58" tabindex="-1"><a class="header-anchor" href="#\u5185\u5B58" aria-hidden="true">#</a> \u5185\u5B58</h3><p>\u5728\u51AF\u8BFA\u4F9D\u66FC\u6A21\u578B\u4E2D\uFF0C\u7A0B\u5E8F\u548C\u6570\u636E\u88AB\u5B58\u50A8\u5728\u4E00\u4E2A\u88AB\u79F0\u4F5C\u5185\u5B58\u7684\u7EBF\u6027\u6392\u5217\u5B58\u50A8\u533A\u57DF\u3002</p><p>\u5B58\u50A8\u7684\u6570\u636E\u5355\u4F4D\u662F\u4E00\u4E2A\u4E8C\u8FDB\u5236\u4F4D\uFF0C\u82F1\u6587\u662F bit\uFF0C\u6700\u5C0F\u7684\u5B58\u50A8\u5355\u4F4D\u53EB\u4F5C\u5B57\u8282\uFF0C\u4E5F\u5C31\u662F 8 \u4F4D\uFF0C\u82F1\u6587\u662F byte\uFF0C\u6BCF\u4E00\u4E2A\u5B57\u8282\u90FD\u5BF9\u5E94\u4E00\u4E2A\u5185\u5B58\u5730\u5740\u3002</p><p>\u5185\u5B58\u5730\u5740\u7531 0 \u5F00\u59CB\u7F16\u53F7\uFF0C\u6BD4\u5982\u7B2C 1 \u4E2A\u5730\u5740\u662F 0\uFF0C\u7B2C 2 \u4E2A\u5730\u5740\u662F 1\uFF0C \u7136\u540E\u81EA\u589E\u6392\u5217\uFF0C\u6700\u540E\u4E00\u4E2A\u5730\u5740\u662F\u5185\u5B58\u4E2D\u7684\u5B57\u8282\u6570\u51CF 1\u3002</p><p>\u6211\u4EEC\u901A\u5E38\u8BF4\u7684\u5185\u5B58\u90FD\u662F\u968F\u673A\u5B58\u53D6\u5668\uFF0C\u4E5F\u5C31\u662F\u8BFB\u53D6\u4EFB\u4F55\u4E00\u4E2A\u5730\u5740\u6570\u636E\u7684\u901F\u5EA6\u662F\u4E00\u6837\u7684\uFF0C\u5199\u5165\u4EFB\u4F55\u4E00\u4E2A\u5730\u5740\u6570\u636E\u7684\u901F\u5EA6\u4E5F\u662F\u4E00\u6837\u7684\u3002</p><h3 id="cpu" tabindex="-1"><a class="header-anchor" href="#cpu" aria-hidden="true">#</a> CPU</h3><p>\u51AF\u8BFA\u4F9D\u66FC\u6A21\u578B\u4E2D CPU \u8D1F\u8D23\u63A7\u5236\u548C\u8BA1\u7B97\uFF0C\u4E3A\u4E86\u65B9\u4FBF\u8BA1\u7B97\u8F83\u5927\u7684\u6570\u503C\uFF0CCPU \u6BCF\u6B21\u53EF\u4EE5\u8BA1\u7B97\u591A\u4E2A\u5B57\u8282\u7684\u6570\u636E\u3002</p><ul><li><p>\u5982\u679C CPU \u6BCF\u6B21\u53EF\u4EE5\u8BA1\u7B97 4 \u4E2A byte\uFF0C\u90A3\u4E48\u6211\u4EEC\u79F0\u4F5C 32 \u4F4D CPU\uFF1B</p></li><li><p>\u5982\u679C CPU \u6BCF\u6B21\u53EF\u4EE5\u8BA1\u7B97 8 \u4E2A byte\uFF0C\u90A3\u4E48\u6211\u4EEC\u79F0\u4F5C 64 \u4F4D CPU\u3002</p></li></ul><p>\u8FD9\u91CC\u7684 32 \u548C 64\uFF0C\u79F0\u4F5C CPU \u7684\u4F4D\u5BBD\u3002</p><p><strong>\u4E3A\u4EC0\u4E48 CPU \u8981\u8FD9\u6837\u8BBE\u8BA1\u5462\uFF1F</strong></p><p>\u56E0\u4E3A\u4E00\u4E2A byte \u6700\u5927\u7684\u8868\u793A\u8303\u56F4\u5C31\u662F 0~255\u3002</p><p>\u6BD4\u5982\u8981\u8BA1\u7B97 <code>20000*50</code>\uFF0C\u5C31\u8D85\u51FA\u4E86byte \u6700\u5927\u7684\u8868\u793A\u8303\u56F4\u4E86\u3002</p><p>\u56E0\u6B64\uFF0CCPU \u9700\u8981\u652F\u6301\u591A\u4E2A byte \u4E00\u8D77\u8BA1\u7B97\uFF0C\u5F53\u7136\uFF0CCPU \u4F4D\u6570\u8D8A\u5927\uFF0C\u53EF\u4EE5\u8BA1\u7B97\u7684\u6570\u503C\u5C31\u8D8A\u5927\uFF0C\u4F46\u662F\u5728\u73B0\u5B9E\u751F\u6D3B\u4E2D\u4E0D\u4E00\u5B9A\u9700\u8981\u8BA1\u7B97\u8FD9\u4E48\u5927\u7684\u6570\u503C\uFF0C\u6BD4\u5982\u8BF4 32 \u4F4D CPU \u80FD\u8BA1\u7B97\u7684\u6700\u5927\u6574\u6570\u662F 4294967295\uFF0C\u8FD9\u5DF2\u7ECF\u975E\u5E38\u5927\u4E86\u3002</p><p><strong>\u63A7\u5236\u5355\u5143\u548C\u903B\u8F91\u8FD0\u7B97\u5355\u5143</strong></p><p>CPU \u4E2D\u6709\u4E00\u4E2A\u63A7\u5236\u5355\u5143\u4E13\u95E8\u8D1F\u8D23\u63A7\u5236 CPU \u5DE5\u4F5C\uFF1B\u8FD8\u6709\u903B\u8F91\u8FD0\u7B97\u5355\u5143\u4E13\u95E8\u8D1F\u8D23\u8BA1\u7B97\u3002</p><p><strong>\u5BC4\u5B58\u5668</strong></p><p>CPU \u8981\u8FDB\u884C\u8BA1\u7B97\uFF0C\u6BD4\u5982\u6700\u7B80\u5355\u7684\u52A0\u548C\u4E24\u4E2A\u6570\u5B57\u65F6\uFF0C\u56E0\u4E3A CPU \u79BB\u5185\u5B58\u592A\u8FDC\uFF0C\u6240\u4EE5\u9700\u8981\u4E00\u79CD\u79BB\u81EA\u5DF1\u8FD1\u7684\u5B58\u50A8\u6765\u5B58\u50A8\u5C06\u8981\u88AB\u8BA1\u7B97\u7684\u6570\u5B57\u3002</p><p>\u8FD9\u79CD\u5B58\u50A8\u5C31\u662F\u5BC4\u5B58\u5668\uFF0C\u5BC4\u5B58\u5668\u5C31\u5728 CPU \u91CC\uFF0C\u63A7\u5236\u5355\u5143\u548C\u903B\u8F91\u8FD0\u7B97\u5355\u5143\u975E\u5E38\u8FD1\uFF0C\u56E0\u6B64\u901F\u5EA6\u5F88\u5FEB\u3002</p><p>\u5E38\u89C1\u7684\u5BC4\u5B58\u5668\u79CD\u7C7B\uFF1A</p><ul><li>\u901A\u7528\u5BC4\u5B58\u5668\uFF0C\u7528\u6765\u5B58\u653E\u9700\u8981\u8FDB\u884C\u8FD0\u7B97\u7684\u6570\u636E\uFF0C\u6BD4\u5982\u9700\u8981\u8FDB\u884C\u52A0\u548C\u8FD0\u7B97\u7684\u4E24\u4E2A\u6570\u636E\u3002</li><li>\u7A0B\u5E8F\u8BA1\u6570\u5668\uFF0C\u7528\u6765\u5B58\u50A8 CPU \u8981\u6267\u884C\u4E0B\u4E00\u6761\u6307\u4EE4\u6240\u5728\u7684\u5185\u5B58\u5730\u5740\uFF0C\u6CE8\u610F\u4E0D\u662F\u5B58\u50A8\u4E86\u4E0B\u4E00\u6761\u8981\u6267\u884C\u7684\u6307\u4EE4\uFF0C\u6B64\u65F6\u6307\u4EE4\u8FD8\u5728\u5185\u5B58\u4E2D\uFF0C\u7A0B\u5E8F\u8BA1\u6570\u5668\u53EA\u662F\u5B58\u50A8\u4E86\u4E0B\u4E00\u6761\u6307\u4EE4\u7684\u5730\u5740\u3002</li><li>\u6307\u4EE4\u5BC4\u5B58\u5668\uFF0C\u7528\u6765\u5B58\u653E\u7A0B\u5E8F\u8BA1\u6570\u5668\u6307\u5411\u7684\u6307\u4EE4\uFF0C\u4E5F\u5C31\u662F\u6307\u4EE4\u672C\u8EAB\uFF0C\u6307\u4EE4\u88AB\u6267\u884C\u5B8C\u6210\u4E4B\u524D\uFF0C\u6307\u4EE4\u90FD\u5B58\u50A8\u5728\u8FD9\u91CC\u3002</li></ul><h4 id="\u591A\u7EA7\u7F13\u5B58" tabindex="-1"><a class="header-anchor" href="#\u591A\u7EA7\u7F13\u5B58" aria-hidden="true">#</a> \u591A\u7EA7\u7F13\u5B58</h4><p>\u73B0\u4EE3CPU\u4E3A\u4E86\u63D0\u5347\u6267\u884C\u6548\u7387\uFF0C\u51CF\u5C11CPU\u4E0E\u5185\u5B58\u7684\u4EA4\u4E92(\u4EA4\u4E92\u5F71\u54CDCPU\u6548\u7387)\uFF0C\u4E00\u822C\u5728CPU\u4E0A\u96C6\u6210\u4E86\u591A\u7EA7\u7F13\u5B58\u67B6\u6784</p><p><strong>CPU\u7F13\u5B58</strong>\u5373\u9AD8\u901F\u7F13\u51B2\u5B58\u50A8\u5668\uFF0C\u662F\u4F4D\u4E8ECPU\u4E0E\u4E3B\u5185\u5B58\u95F4\u7684\u4E00\u79CD\u5BB9\u91CF\u8F83\u5C0F\u4F46\u901F\u5EA6\u5F88\u9AD8\u7684\u5B58\u50A8\u5668</p><p>\u7531\u4E8ECPU\u7684\u901F\u5EA6\u8FDC\u9AD8\u4E8E\u4E3B\u5185\u5B58\uFF0CCPU\u76F4\u63A5\u4ECE\u5185\u5B58\u4E2D\u5B58\u53D6\u6570\u636E\u8981\u7B49\u5F85\u4E00\u5B9A\u65F6\u95F4\u5468\u671F\uFF0CCache\u4E2D\u4FDD\u5B58\u7740CPU\u521A\u7528\u8FC7\u6216\u5FAA\u73AF\u4F7F\u7528\u7684\u4E00\u90E8\u5206\u6570\u636E\uFF0C\u5F53CPU\u518D\u6B21\u4F7F\u7528\u8BE5\u90E8\u5206\u6570\u636E\u65F6\u53EF\u4ECECache\u4E2D\u76F4\u63A5\u8C03\u7528\uFF0C\u51CF\u5C11CPU\u7684\u7B49\u5F85\u65F6\u95F4\uFF0C\u63D0\u9AD8\u4E86\u7CFB\u7EDF\u7684\u6548\u7387\uFF0C\u5177\u4F53\u5305\u62EC\u4EE5\u4E0B\u51E0\u79CD\uFF1A</p><p><strong>L1-Cache</strong></p><p>L1- \u7F13\u5B58\u5728 CPU \u4E2D\uFF0C\u76F8\u6BD4\u5BC4\u5B58\u5668\uFF0C\u867D\u7136\u5B83\u7684\u4F4D\u7F6E\u8DDD\u79BB CPU \u6838\u5FC3\u66F4\u8FDC\uFF0C\u4F46\u9020\u4EF7\u66F4\u4F4E\uFF0C\u901A\u5E38 L1-Cache \u5927\u5C0F\u5728\u51E0\u5341 Kb \u5230\u51E0\u767E Kb \u4E0D\u7B49\uFF0C\u8BFB\u5199\u901F\u5EA6\u5728 2~4 \u4E2A CPU \u65F6\u949F\u5468\u671F\u3002</p><p><strong>L2-Cache</strong></p><p>L2- \u7F13\u5B58\u4E5F\u5728 CPU \u4E2D\uFF0C\u4F4D\u7F6E\u6BD4 L1- \u7F13\u5B58\u8DDD\u79BB CPU \u6838\u5FC3\u66F4\u8FDC\uFF0C\u5B83\u7684\u5927\u5C0F\u6BD4 L1-Cache \u66F4\u5927\uFF0C\u5177\u4F53\u5927\u5C0F\u8981\u770B CPU \u578B\u53F7\uFF0C\u6709 2M \u7684\uFF0C\u4E5F\u6709\u66F4\u5C0F\u6216\u8005\u66F4\u5927\u7684\uFF0C\u901F\u5EA6\u5728 10~20 \u4E2A CPU \u5468\u671F\u3002</p><p><strong>L3-Cache</strong></p><p>L3- \u7F13\u5B58\u540C\u6837\u5728 CPU \u4E2D\uFF0C\u4F4D\u7F6E\u6BD4 L2- \u7F13\u5B58\u8DDD\u79BB CPU \u6838\u5FC3\u66F4\u8FDC\uFF0C\u5927\u5C0F\u901A\u5E38\u6BD4 L2-Cache \u66F4\u5927\uFF0C\u8BFB\u5199\u901F\u5EA6\u5728 20~60 \u4E2A CPU \u5468\u671F\u3002</p><p>L3 \u7F13\u5B58\u5927\u5C0F\u4E5F\u662F\u770B\u578B\u53F7\u7684\uFF0C\u6BD4\u5982 i9 CPU \u6709 512KB L1 Cache\uFF1B\u6709 2MB L2 Cache\uFF1B \u670916MB L3 Cache\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/os-214a4294-df48-4ed4-8f6a-15c93c02037d.png" alt=""></p><p>\u5F53 CPU \u9700\u8981\u5185\u5B58\u4E2D\u67D0\u4E2A\u6570\u636E\u7684\u65F6\u5019\uFF0C\u5982\u679C\u5BC4\u5B58\u5668\u4E2D\u6709\u8FD9\u4E2A\u6570\u636E\uFF0C\u6211\u4EEC\u53EF\u4EE5\u76F4\u63A5\u4F7F\u7528\uFF1B\u5982\u679C\u5BC4\u5B58\u5668\u4E2D\u6CA1\u6709\u8FD9\u4E2A\u6570\u636E\uFF0C\u6211\u4EEC\u5C31\u8981\u5148\u67E5\u8BE2 L1 \u7F13\u5B58\uFF1BL1 \u4E2D\u6CA1\u6709\uFF0C\u518D\u67E5\u8BE2 L2 \u7F13\u5B58\uFF1BL2 \u4E2D\u6CA1\u6709\u518D\u67E5\u8BE2 L3 \u7F13\u5B58\uFF1BL3 \u4E2D\u6CA1\u6709\uFF0C\u518D\u53BB\u5185\u5B58\u4E2D\u62FF\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/os-936b2476-4704-4928-bfd0-d7417d0f1ab8.png" alt=""></p><p><strong>\u603B\u7ED3\uFF1A</strong></p><p>\u5B58\u50A8\u5668\u5B58\u50A8\u7A7A\u95F4\u5927\u5C0F\uFF1A\u5185\u5B58&gt;L3&gt;L2&gt;L1&gt;\u5BC4\u5B58\u5668\uFF1B</p><p>\u5B58\u50A8\u5668\u901F\u5EA6\u5FEB\u6162\u6392\u5E8F\uFF1A\u5BC4\u5B58\u5668&gt;L1&gt;L2&gt;L3&gt;\u5185\u5B58\uFF1B</p><h4 id="\u5B89\u5168\u7B49\u7EA7" tabindex="-1"><a class="header-anchor" href="#\u5B89\u5168\u7B49\u7EA7" aria-hidden="true">#</a> \u5B89\u5168\u7B49\u7EA7</h4><p><strong>CPU\u8FD0\u884C\u5B89\u5168\u7B49\u7EA7</strong></p><p>CPU\u67094\u4E2A\u8FD0\u884C\u7EA7\u522B\uFF0C\u5206\u522B\u4E3A\uFF1A</p><ul><li>ring0\uFF0Cring1\uFF0Cring2\uFF0Cring3</li></ul><p>ring0\u53EA\u7ED9\u64CD\u4F5C\u7CFB\u7EDF\u7528\uFF0Cring3\u8C01\u90FD\u80FD\u7528\u3002</p><p>ring0\u662F\u6307CPU\u7684\u8FD0\u884C\u7EA7\u522B\uFF0C\u662F\u6700\u9AD8\u7EA7\u522B\uFF0Cring1\u6B21\u4E4B\uFF0Cring2\u66F4\u6B21\u4E4B\u2026\u2026</p><p>\u7CFB\u7EDF\uFF08\u5185\u6838\uFF09\u7684\u4EE3\u7801\u8FD0\u884C\u5728\u6700\u9AD8\u8FD0\u884C\u7EA7\u522Bring0\u4E0A\uFF0C\u53EF\u4EE5\u4F7F\u7528\u7279\u6743\u6307\u4EE4\uFF0C\u63A7\u5236\u4E2D\u65AD\u3001\u4FEE\u6539\u9875\u8868\u3001\u8BBF\u95EE\u8BBE\u5907\u7B49\u7B49\u3002</p><p>\u5E94\u7528\u7A0B\u5E8F\u7684\u4EE3\u7801\u8FD0\u884C\u5728\u6700\u4F4E\u8FD0\u884C\u7EA7\u522B\u4E0Aring3\u4E0A\uFF0C\u4E0D\u80FD\u505A\u53D7\u63A7\u64CD\u4F5C\u3002</p><p>\u5982\u679C\u8981\u505A\uFF0C\u6BD4\u5982\u8981\u8BBF\u95EE\u78C1\u76D8\uFF0C\u5199\u6587\u4EF6\uFF0C\u90A3\u5C31\u8981\u901A\u8FC7\u6267\u884C\u7CFB\u7EDF\u8C03\u7528\uFF08\u51FD\u6570\uFF09\uFF0C\u6267\u884C\u7CFB\u7EDF\u8C03\u7528\u7684\u65F6\u5019\uFF0CCPU\u7684\u8FD0\u884C\u7EA7\u522B\u4F1A\u53D1\u751F\u4ECEring3\u5230ring0\u7684\u5207\u6362\uFF0C\u5E76\u8DF3\u8F6C\u5230\u7CFB\u7EDF\u8C03\u7528\u5BF9\u5E94\u7684\u5185\u6838\u4EE3\u7801\u4F4D\u7F6E\u6267\u884C\uFF0C\u8FD9\u6837\u5185\u6838\u5C31\u4E3A\u4F60\u5B8C\u6210\u4E86\u8BBE\u5907\u8BBF\u95EE\uFF0C\u5B8C\u6210\u4E4B\u540E\u518D\u4ECEring0\u8FD4\u56DEring3\u3002</p><p>\u8FD9\u4E2A\u8FC7\u7A0B\u4E5F\u79F0\u4F5C\u7528\u6237\u6001\u548C\u5185\u6838\u6001\u7684\u5207\u6362\u3002</p><h4 id="\u5C40\u90E8\u6027\u539F\u7406" tabindex="-1"><a class="header-anchor" href="#\u5C40\u90E8\u6027\u539F\u7406" aria-hidden="true">#</a> \u5C40\u90E8\u6027\u539F\u7406</h4><p>\u5728CPU\u8BBF\u95EE\u5B58\u50A8\u8BBE\u5907\u65F6\uFF0C\u65E0\u8BBA\u662F\u5B58\u53D6\u6570\u636E\u6291\u6216\u5B58\u53D6\u6307\u4EE4\uFF0C\u90FD\u8D8B\u4E8E\u805A\u96C6\u5728\u4E00\u7247\u8FDE\u7EED\u7684\u533A\u57DF\u4E2D\uFF0C\u8FD9\u5C31\u88AB\u79F0\u4E3A\u5C40\u90E8\u6027\u539F\u7406</p><p><strong>\u65F6\u95F4\u5C40\u90E8\u6027\uFF08Temporal Locality\uFF09\uFF1A</strong></p><p>\u5982\u679C\u4E00\u4E2A\u4FE1\u606F\u9879\u6B63\u5728\u88AB\u8BBF\u95EE\uFF0C\u90A3\u4E48\u5728\u8FD1\u671F\u5B83\u5F88\u53EF\u80FD\u8FD8\u4F1A\u88AB\u518D\u6B21\u8BBF\u95EE\u3002</p><p>\u6BD4\u5982\u5FAA\u73AF\u3001\u9012\u5F52\u3001\u65B9\u6CD5\u7684\u53CD\u590D\u8C03\u7528\u7B49\u3002</p><p><strong>\u7A7A\u95F4\u5C40\u90E8\u6027\uFF08Spatial Locality\uFF09\uFF1A</strong></p><p>\u5982\u679C\u4E00\u4E2A\u5B58\u50A8\u5668\u7684\u4F4D\u7F6E\u88AB\u5F15\u7528\uFF0C\u90A3\u4E48\u5C06\u6765\u4ED6\u9644\u8FD1\u7684\u4F4D\u7F6E\u4E5F\u4F1A\u88AB\u5F15\u7528\u3002</p><p>\u6BD4\u5982\u987A\u5E8F\u6267\u884C\u7684\u4EE3\u7801\u3001\u8FDE\u7EED\u521B\u5EFA\u7684\u4E24\u4E2A\u5BF9\u8C61\u3001\u6570\u7EC4\u7B49\u3002</p><h4 id="\u7A0B\u5E8F\u7684\u6267\u884C\u8FC7\u7A0B" tabindex="-1"><a class="header-anchor" href="#\u7A0B\u5E8F\u7684\u6267\u884C\u8FC7\u7A0B" aria-hidden="true">#</a> \u7A0B\u5E8F\u7684\u6267\u884C\u8FC7\u7A0B</h4><p>\u7A0B\u5E8F\u5B9E\u9645\u4E0A\u662F\u4E00\u6761\u4E00\u6761\u6307\u4EE4\uFF0C\u6240\u4EE5\u7A0B\u5E8F\u7684\u8FD0\u884C\u8FC7\u7A0B\u5C31\u662F\u628A\u6BCF\u4E00\u6761\u6307\u4EE4\u4E00\u6B65\u4E00\u6B65\u7684\u6267\u884C\u8D77\u6765\uFF0C\u8D1F\u8D23\u6267\u884C\u6307\u4EE4\u7684\u5C31\u662F CPU \u4E86\u3002</p><p><strong>\u90A3 CPU \u6267\u884C\u7A0B\u5E8F\u7684\u8FC7\u7A0B\u5982\u4E0B\uFF1A</strong></p><ul><li>\u7B2C\u4E00\u6B65\uFF0CCPU \u8BFB\u53D6\u7A0B\u5E8F\u8BA1\u6570\u5668\u7684\u503C\uFF0C\u8FD9\u4E2A\u503C\u662F\u6307\u4EE4\u7684\u5185\u5B58\u5730\u5740\uFF0C\u7136\u540E CPU \u7684\u63A7\u5236\u5355\u5143\u64CD\u4F5C\u5730\u5740\u603B\u7EBF\u6307\u5B9A\u9700\u8981\u8BBF\u95EE\u7684\u5185\u5B58\u5730\u5740\uFF0C\u63A5\u7740\u901A\u77E5\u5185\u5B58\u8BBE\u5907\u51C6\u5907\u6570\u636E\uFF0C\u6570\u636E\u51C6\u5907\u597D\u540E\u901A\u8FC7\u6570\u636E\u603B\u7EBF\u5C06\u6307\u4EE4\u6570\u636E\u4F20\u7ED9 CPU\uFF0CCPU \u6536\u5230\u5185\u5B58\u4F20\u6765\u7684\u6570\u636E\u540E\uFF0C\u5C06\u8FD9\u4E2A\u6307\u4EE4\u6570\u636E\u5B58\u5165\u5230\u6307\u4EE4\u5BC4\u5B58\u5668\u3002</li><li>\u7B2C\u4E8C\u6B65\uFF0CCPU \u5206\u6790\u6307\u4EE4\u5BC4\u5B58\u5668\u4E2D\u7684\u6307\u4EE4\uFF0C\u786E\u5B9A\u6307\u4EE4\u7684\u7C7B\u578B\u548C\u53C2\u6570\uFF0C\u5982\u679C\u662F\u8BA1\u7B97\u7C7B\u578B\u7684\u6307\u4EE4\uFF0C\u5C31\u628A\u6307\u4EE4\u4EA4\u7ED9\u903B\u8F91\u8FD0\u7B97\u5355\u5143\u8FD0\u7B97\uFF1B\u5982\u679C\u662F\u5B58\u50A8\u7C7B\u578B\u7684\u6307\u4EE4\uFF0C\u5219\u4EA4\u7531\u63A7\u5236\u5355\u5143\u6267\u884C\uFF1B</li><li>\u7B2C\u4E09\u6B65\uFF0CCPU \u6267\u884C\u5B8C\u6307\u4EE4\u540E\uFF0C\u7A0B\u5E8F\u8BA1\u6570\u5668\u7684\u503C\u81EA\u589E\uFF0C\u8868\u793A\u6307\u5411\u4E0B\u4E00\u6761\u6307\u4EE4\u3002\u8FD9\u4E2A\u81EA\u589E\u7684\u5927\u5C0F\uFF0C\u7531 CPU \u7684\u4F4D\u5BBD\u51B3\u5B9A\uFF0C\u6BD4\u5982 32 \u4F4D\u7684 CPU\uFF0C\u6307\u4EE4\u662F 4 \u4E2A\u5B57\u8282\uFF0C\u9700\u8981 4 \u4E2A\u5185\u5B58\u5730\u5740\u5B58\u653E\uFF0C\u56E0\u6B64\u7A0B\u5E8F\u8BA1\u6570\u5668\u7684\u503C\u4F1A\u81EA\u589E 4\uFF1B</li></ul><p>\u7B80\u5355\u603B\u7ED3\u4E00\u4E0B\u5C31\u662F\uFF0C\u4E00\u4E2A\u7A0B\u5E8F\u6267\u884C\u7684\u65F6\u5019\uFF0CCPU \u4F1A\u6839\u636E\u7A0B\u5E8F\u8BA1\u6570\u5668\u91CC\u7684\u5185\u5B58\u5730\u5740\uFF0C\u4ECE\u5185\u5B58\u91CC\u9762\u628A\u9700\u8981\u6267\u884C\u7684\u6307\u4EE4\u8BFB\u53D6\u5230\u6307\u4EE4\u5BC4\u5B58\u5668\u91CC\u9762\u6267\u884C\uFF0C\u7136\u540E\u6839\u636E\u6307\u4EE4\u957F\u5EA6\u81EA\u589E\uFF0C\u5F00\u59CB\u987A\u5E8F\u8BFB\u53D6\u4E0B\u4E00\u6761\u6307\u4EE4\u3002</p><p>CPU \u4ECE\u7A0B\u5E8F\u8BA1\u6570\u5668\u8BFB\u53D6\u6307\u4EE4\u3001\u5230\u6267\u884C\u3001\u518D\u5230\u4E0B\u4E00\u6761\u6307\u4EE4\uFF0C\u8FD9\u4E2A\u8FC7\u7A0B\u4F1A\u4E0D\u65AD\u5FAA\u73AF\uFF0C\u76F4\u5230\u7A0B\u5E8F\u6267\u884C\u7ED3\u675F\uFF0C\u8FD9\u4E2A\u4E0D\u65AD\u5FAA\u73AF\u7684\u8FC7\u7A0B\u88AB\u79F0\u4E3A <strong>CPU \u7684\u6307\u4EE4\u5468\u671F</strong>\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/os-0e135ca2-26fa-4495-8a4b-3c9c05a4341e.png" alt=""></p><h3 id="\u603B\u7EBF" tabindex="-1"><a class="header-anchor" href="#\u603B\u7EBF" aria-hidden="true">#</a> \u603B\u7EBF</h3><p>CPU \u548C\u5185\u5B58\u4EE5\u53CA\u5176\u4ED6\u8BBE\u5907\u4E4B\u95F4\uFF0C\u4E5F\u9700\u8981\u901A\u4FE1\uFF0C\u56E0\u6B64\u6211\u4EEC\u7528\u4E00\u79CD\u7279\u6B8A\u7684\u8BBE\u5907\u8FDB\u884C\u63A7\u5236\uFF0C\u5C31\u662F\u603B\u7EBF\u3002</p><ul><li>\u5730\u5740\u603B\u7EBF\uFF0C\u7528\u4E8E\u6307\u5B9A CPU \u5C06\u8981\u64CD\u4F5C\u7684\u5185\u5B58\u5730\u5740\uFF1B</li><li>\u6570\u636E\u603B\u7EBF\uFF0C\u7528\u4E8E\u8BFB\u5199\u5185\u5B58\u7684\u6570\u636E\uFF1B</li><li>\u63A7\u5236\u603B\u7EBF\uFF0C\u7528\u4E8E\u53D1\u9001\u548C\u63A5\u6536\u4FE1\u53F7\uFF0C\u6BD4\u5982\u4E2D\u65AD\u3001\u8BBE\u5907\u590D\u4F4D\u7B49\u4FE1\u53F7\uFF0CCPU \u6536\u5230\u4FE1\u53F7\u540E\u81EA\u7136\u8FDB\u884C\u54CD\u5E94\uFF0C\u8FD9\u65F6\u4E5F\u9700\u8981\u63A7\u5236\u603B\u7EBF\uFF1B</li></ul><p>\u5F53 CPU \u8981\u8BFB\u5199\u5185\u5B58\u6570\u636E\u7684\u65F6\u5019\uFF0C\u4E00\u822C\u9700\u8981\u901A\u8FC7\u4E24\u4E2A\u603B\u7EBF\uFF1A</p><ul><li>\u9996\u5148\u8981\u901A\u8FC7\u5730\u5740\u603B\u7EBF\u6765\u6307\u5B9A\u5185\u5B58\u7684\u5730\u5740\uFF1B</li><li>\u518D\u901A\u8FC7\u6570\u636E\u603B\u7EBF\u6765\u4F20\u8F93\u6570\u636E\uFF1B</li></ul><h3 id="\u8F93\u5165\u3001\u8F93\u51FA\u8BBE\u5907" tabindex="-1"><a class="header-anchor" href="#\u8F93\u5165\u3001\u8F93\u51FA\u8BBE\u5907" aria-hidden="true">#</a> \u8F93\u5165\u3001\u8F93\u51FA\u8BBE\u5907</h3><p>\u8F93\u5165\u8BBE\u5907\u5411\u8BA1\u7B97\u673A\u8F93\u5165\u6570\u636E\uFF0C\u8BA1\u7B97\u673A\u7ECF\u8FC7\u8BA1\u7B97\uFF0C\u5C06\u7ED3\u679C\u901A\u8FC7\u8F93\u51FA\u8BBE\u5907\u5411\u5916\u754C\u4F20\u8FBE\u3002</p><p>\u5982\u679C\u8F93\u5165\u8BBE\u5907\u3001\u8F93\u51FA\u8BBE\u5907\u60F3\u8981\u548C CPU \u8FDB\u884C\u4EA4\u4E92\uFF0C\u6BD4\u5982\u8BF4\u7528\u6237\u6309\u952E\u9700\u8981 CPU \u54CD\u5E94\uFF0C\u8FD9\u65F6\u5019\u5C31\u9700\u8981\u7528\u5230\u63A7\u5236\u603B\u7EBF\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><h2 id="\u57FA\u7840\u77E5\u8BC6" tabindex="-1"><a class="header-anchor" href="#\u57FA\u7840\u77E5\u8BC6" aria-hidden="true">#</a> \u57FA\u7840\u77E5\u8BC6</h2><h3 id="\u4E2D\u65AD" tabindex="-1"><a class="header-anchor" href="#\u4E2D\u65AD" aria-hidden="true">#</a> \u4E2D\u65AD</h3><p><strong>\u4E2D\u65AD\u7684\u7C7B\u578B</strong></p><ul><li><p>\u6309\u7167\u4E2D\u65AD\u7684\u89E6\u53D1\u65B9\u5206\u6210\u540C\u6B65\u4E2D\u65AD\u548C\u5F02\u6B65\u4E2D\u65AD\uFF1B</p></li><li><p>\u6839\u636E\u4E2D\u65AD\u662F\u5426\u5F3A\u5236\u89E6\u53D1\u5206\u6210\u53EF\u5C4F\u853D\u4E2D\u65AD\u548C\u4E0D\u53EF\u5C4F\u853D\u4E2D\u65AD\u3002</p></li></ul><p>\u4E2D\u65AD\u53EF\u4EE5\u7531 CPU \u6307\u4EE4\u76F4\u63A5\u89E6\u53D1\uFF0C\u8FD9\u79CD\u4E3B\u52A8\u89E6\u53D1\u7684\u4E2D\u65AD\uFF0C\u53EB\u4F5C\u540C\u6B65\u4E2D\u65AD\u3002</p><blockquote><p>\u540C\u6B65\u4E2D\u65AD\u6709\u51E0\u79CD\u60C5\u51B5\u3002</p></blockquote><ul><li><p>\u6BD4\u5982\u7CFB\u7EDF\u8C03\u7528\uFF0C\u9700\u8981\u4ECE\u7528\u6237\u6001\u5207\u6362\u5185\u6838\u6001\uFF0C\u8FD9\u79CD\u60C5\u51B5\u9700\u8981\u7A0B\u5E8F\u89E6\u53D1\u4E00\u4E2A\u4E2D\u65AD\uFF0C\u53EB\u4F5C\u9677\u9631\uFF08Trap\uFF09\uFF0C\u4E2D\u65AD\u89E6\u53D1\u540E\u9700\u8981\u7EE7\u7EED\u6267\u884C\u7CFB\u7EDF\u8C03\u7528\u3002</p></li><li><p>\u8FD8\u6709\u4E00\u79CD\u540C\u6B65\u4E2D\u65AD\u60C5\u51B5\u662F\u9519\u8BEF\uFF08Fault\uFF09\uFF0C\u901A\u5E38\u662F\u56E0\u4E3A\u68C0\u6D4B\u5230\u67D0\u79CD\u9519\u8BEF\uFF0C\u9700\u8981\u89E6\u53D1\u4E00\u4E2A\u4E2D\u65AD\uFF0C\u4E2D\u65AD\u54CD\u5E94\u7ED3\u675F\u540E\uFF0C\u4F1A\u91CD\u65B0\u6267\u884C\u89E6\u53D1\u9519\u8BEF\u7684\u5730\u65B9\uFF0C\u6BD4\u5982\u540E\u9762\u6211\u4EEC\u8981\u5B66\u4E60\u7684\u7F3A\u9875\u4E2D\u65AD\u3002</p></li><li><p>\u6700\u540E\u8FD8\u6709\u4E00\u79CD\u60C5\u51B5\u662F\u7A0B\u5E8F\u7684\u5F02\u5E38\uFF0C\u8FD9\u79CD\u60C5\u51B5\u548C Trap \u7C7B\u4F3C\uFF0C\u7528\u4E8E\u5B9E\u73B0\u7A0B\u5E8F\u629B\u51FA\u7684\u5F02\u5E38\u3002</p></li></ul><p>\u53E6\u4E00\u90E8\u5206\u4E2D\u65AD\u4E0D\u662F\u7531 CPU \u76F4\u63A5\u89E6\u53D1\uFF0C\u662F\u56E0\u4E3A\u9700\u8981\u54CD\u5E94\u5916\u90E8\u7684\u901A\u77E5\uFF0C\u6BD4\u5982\u54CD\u5E94\u952E\u76D8\u3001\u9F20\u6807\u7B49\u8BBE\u5907\u800C\u89E6\u53D1\u7684\u4E2D\u65AD\uFF0C\u8FD9\u79CD\u4E2D\u65AD\u6211\u4EEC\u79F0\u4E3A\u5F02\u6B65\u4E2D\u65AD\u3002</p><p>CPU \u901A\u5E38\u90FD\u652F\u6301\u8BBE\u7F6E\u4E00\u4E2A\u4E2D\u65AD\u5C4F\u853D\u4F4D\uFF08\u4E00\u4E2A\u5BC4\u5B58\u5668\uFF09\uFF0C\u8BBE\u7F6E\u4E3A 1 \u4E4B\u540E CPU \u6682\u65F6\u5C31\u4E0D\u518D\u54CD\u5E94\u4E2D\u65AD\u3002</p><p>\u5BF9\u4E8E\u952E\u76D8\u9F20\u6807\u8F93\u5165\uFF0C\u6BD4\u5982\u9677\u9631\u3001\u9519\u8BEF\u3001\u5F02\u5E38\u7B49\u60C5\u51B5\uFF0C\u4F1A\u88AB\u4E34\u65F6\u5C4F\u853D\u3002</p><p>\u4F46\u662F\u5BF9\u4E8E\u4E00\u4E9B\u7279\u522B\u91CD\u8981\u7684\u4E2D\u65AD\uFF0C\u6BD4\u5982 CPU \u6545\u969C\u5BFC\u81F4\u7684\u6389\u7535\u4E2D\u65AD\uFF0C\u8FD8\u662F\u4F1A\u6B63\u5E38\u89E6\u53D1\u3002</p><p><strong>\u53EF\u4EE5\u88AB\u5C4F\u853D\u7684\u4E2D\u65AD\u6211\u4EEC\u79F0\u4E3A\u53EF\u5C4F\u853D\u4E2D\u65AD\uFF0C\u591A\u6570\u4E2D\u65AD\u90FD\u662F\u53EF\u5C4F\u853D\u4E2D\u65AD\u3002</strong></p><h3 id="\u5185\u6838\u6001\u548C\u7528\u6237\u6001" tabindex="-1"><a class="header-anchor" href="#\u5185\u6838\u6001\u548C\u7528\u6237\u6001" aria-hidden="true">#</a> \u5185\u6838\u6001\u548C\u7528\u6237\u6001</h3><p><strong>\u4EC0\u4E48\u662F\u7528\u6237\u6001\u548C\u5185\u6838\u6001</strong></p><p>Kernel \u8FD0\u884C\u5728\u8D85\u7EA7\u6743\u9650\u6A21\u5F0F\u4E0B\uFF0C\u6240\u4EE5\u62E5\u6709\u5F88\u9AD8\u7684\u6743\u9650\u3002</p><p>\u6309\u7167\u6743\u9650\u7BA1\u7406\u7684\u539F\u5219\uFF0C\u591A\u6570\u5E94\u7528\u7A0B\u5E8F\u5E94\u8BE5\u8FD0\u884C\u5728\u6700\u5C0F\u6743\u9650\u4E0B\u3002</p><p>\u56E0\u6B64\uFF0C\u5F88\u591A\u64CD\u4F5C\u7CFB\u7EDF\uFF0C\u5C06\u5185\u5B58\u5206\u6210\u4E86\u4E24\u4E2A\u533A\u57DF\uFF1A</p><ul><li><p>\u5185\u6838\u7A7A\u95F4\uFF08Kernal Space\uFF09\uFF0C\u8FD9\u4E2A\u7A7A\u95F4\u53EA\u6709\u5185\u6838\u7A0B\u5E8F\u53EF\u4EE5\u8BBF\u95EE\uFF1B</p></li><li><p>\u7528\u6237\u7A7A\u95F4\uFF08User Space\uFF09\uFF0C\u8FD9\u90E8\u5206\u5185\u5B58\u4E13\u95E8\u7ED9\u5E94\u7528\u7A0B\u5E8F\u4F7F\u7528\u3002</p></li></ul><p>\u7528\u6237\u7A7A\u95F4\u4E2D\u7684\u4EE3\u7801\u88AB\u9650\u5236\u4E86\u53EA\u80FD\u4F7F\u7528\u4E00\u4E2A\u5C40\u90E8\u7684\u5185\u5B58\u7A7A\u95F4\uFF0C\u6211\u4EEC\u8BF4\u8FD9\u4E9B\u7A0B\u5E8F\u5728\u7528\u6237\u6001 \u6267\u884C\u3002</p><p>\u5185\u6838\u7A7A\u95F4\u4E2D\u7684\u4EE3\u7801\u53EF\u4EE5\u8BBF\u95EE\u6240\u6709\u5185\u5B58\uFF0C\u6211\u4EEC\u79F0\u8FD9\u4E9B\u7A0B\u5E8F\u5728\u5185\u6838\u6001 \u6267\u884C\u3002</p><blockquote><p>\u6309\u7167\u7EA7\u522B\u5206\uFF1A</p></blockquote><p>\u5F53\u7A0B\u5E8F\u8FD0\u884C\u57280\u7EA7\u7279\u6743\u7EA7\u4E0A\u65F6\uFF0C\u5C31\u53EF\u4EE5\u79F0\u4E4B\u4E3A\u8FD0\u884C\u5728\u5185\u6838\u6001</p><p>\u5F53\u7A0B\u5E8F\u8FD0\u884C\u57283\u7EA7\u7279\u6743\u7EA7\u4E0A\u65F6\uFF0C\u5C31\u53EF\u4EE5\u79F0\u4E4B\u4E3A\u8FD0\u884C\u5728\u7528\u6237\u6001</p><p>\u8FD0\u884C\u5728\u7528\u6237\u6001\u4E0B\u7684\u7A0B\u5E8F\u4E0D\u80FD\u76F4\u63A5\u8BBF\u95EE\u64CD\u4F5C\u7CFB\u7EDF\u5185\u6838\u6570\u636E\u7ED3\u6784\u548C\u7A0B\u5E8F\u3002</p><p>\u5F53\u6211\u4EEC\u5728\u7CFB\u7EDF\u4E2D\u6267\u884C\u4E00\u4E2A\u7A0B\u5E8F\u65F6\uFF0C\u5927\u90E8\u5206\u65F6\u95F4\u662F\u8FD0\u884C\u5728\u7528\u6237\u6001\u4E0B\u7684\uFF0C\u5728\u5176\u9700\u8981\u64CD\u4F5C\u7CFB\u7EDF\u5E2E\u52A9\u5B8C\u6210\u67D0\u4E9B\u5B83\u6CA1\u6709\u6743\u529B\u548C\u80FD\u529B\u5B8C\u6210\u7684\u5DE5\u4F5C\u65F6\u5C31\u4F1A\u5207\u6362\u5230\u5185\u6838\u6001\uFF08\u6BD4\u5982\u64CD\u4F5C\u786C\u4EF6\uFF09</p><p><strong>\u8FD9\u4E24\u79CD\u72B6\u6001\u7684\u4E3B\u8981\u5DEE\u522B</strong></p><p>\u5904\u4E8E\u7528\u6237\u6001\u6267\u884C\u65F6\uFF0C\u8FDB\u7A0B\u6240\u80FD\u8BBF\u95EE\u7684\u5185\u5B58\u7A7A\u95F4\u548C\u5BF9\u8C61\u53D7\u5230\u9650\u5236\uFF0C\u5176\u6240\u5904\u4E8E\u5360\u6709\u7684\u5904\u7406\u5668\u662F\u53EF\u88AB\u62A2\u5360\u7684</p><p>\u5904\u4E8E\u5185\u6838\u6001\u6267\u884C\u65F6\uFF0C\u5219\u80FD\u8BBF\u95EE\u6240\u6709\u7684\u5185\u5B58\u7A7A\u95F4\u548C\u5BF9\u8C61\uFF0C\u4E14\u6240\u5360\u6709\u7684\u5904\u7406\u5668\u662F\u4E0D\u5141\u8BB8\u88AB\u62A2\u5360\u7684\u3002</p><p><strong>\u4E3A\u4EC0\u4E48\u8981\u6709\u7528\u6237\u6001\u548C\u5185\u6838\u6001</strong></p><p>\u7531\u4E8E\u9700\u8981\u9650\u5236\u4E0D\u540C\u7684\u7A0B\u5E8F\u4E4B\u95F4\u7684\u8BBF\u95EE\u80FD\u529B\uFF0C\u9632\u6B62\u4ED6\u4EEC\u83B7\u53D6\u522B\u7684\u7A0B\u5E8F\u7684\u5185\u5B58\u6570\u636E\uFF0C\u6216\u8005\u83B7\u53D6\u5916\u56F4\u8BBE\u5907\u7684\u6570\u636E\uFF0C\u5E76\u53D1\u9001\u5230\u7F51\u7EDC</p><p><strong>\u7528\u6237\u6001\u4E0E\u5185\u6838\u6001\u7684\u5207\u6362</strong></p><p>\u6240\u6709\u7528\u6237\u7A0B\u5E8F\u90FD\u662F\u8FD0\u884C\u5728\u7528\u6237\u6001\u7684\uFF0C\u4F46\u662F\u6709\u65F6\u5019\u7A0B\u5E8F\u786E\u5B9E\u9700\u8981\u505A\u4E00\u4E9B\u5185\u6838\u6001\u7684\u4E8B\u60C5\uFF0C \u4F8B\u5982\u4ECE\u786C\u76D8\u8BFB\u53D6\u6570\u636E\uFF0C\u6216\u8005\u4ECE\u952E\u76D8\u83B7\u53D6\u8F93\u5165\u7B49\uFF0C\u800C\u552F\u4E00\u53EF\u4EE5\u505A\u8FD9\u4E9B\u4E8B\u60C5\u7684\u5C31\u662F\u64CD\u4F5C\u7CFB\u7EDF\uFF0C\u6240\u4EE5\u6B64\u65F6\u7A0B\u5E8F\u5C31\u9700\u8981\u5148\u64CD\u4F5C\u7CFB\u7EDF\u8BF7\u6C42\u4EE5\u7A0B\u5E8F\u7684\u540D\u4E49\u6765\u6267\u884C\u8FD9\u4E9B\u64CD\u4F5C</p><p><strong>\u7528\u6237\u6001\u548C\u5185\u6838\u6001\u7684\u8F6C\u6362</strong></p><blockquote><p>\u7CFB\u7EDF\u8C03\u7528</p></blockquote><p>\u7528\u6237\u6001\u8FDB\u7A0B\u901A\u8FC7\u7CFB\u7EDF\u8C03\u7528\u7533\u8BF7\u4F7F\u7528\u64CD\u4F5C\u7CFB\u7EDF\u63D0\u4F9B\u7684\u670D\u52A1\u7A0B\u5E8F\u5B8C\u6210\u5DE5\u4F5C\uFF0C\u6BD4\u5982fork()\u5B9E\u9645\u4E0A\u5C31\u662F\u6267\u884C\u4E86\u4E00\u4E2A\u521B\u5EFA\u65B0\u8FDB\u7A0B\u7684\u7CFB\u7EDF\u8C03\u7528</p><p>\u800C\u7CFB\u7EDF\u8C03\u7528\u7684\u673A\u5236\u5176\u6838\u5FC3\u8FD8\u662F\u4F7F\u7528\u4E86\u64CD\u4F5C\u7CFB\u7EDF\u4E3A\u7528\u6237\u7279\u522B\u5F00\u653E\u7684\u4E00\u4E2A\u4E2D\u65AD\u6765\u5B9E\u73B0\uFF0C\u4F8B\u5982Linux\u7684int 80h\u4E2D\u65AD</p><p><strong>\u4E3E\u4F8B\uFF1A</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/os-29b6f34f-a8b3-48ec-8e5c-aea1036ea16a.png" alt=""></p><p>\u5982\u4E0A\u56FE\u6240\u793A\uFF1A\u5185\u6838\u7A0B\u5E8F\u6267\u884C\u5728\u5185\u6838\u6001\uFF08Kernal Mode\uFF09\uFF0C\u7528\u6237\u7A0B\u5E8F\u6267\u884C\u5728\u7528\u6237\u6001\uFF08User Mode\uFF09\u3002</p><p>\u5F53\u53D1\u751F\u7CFB\u7EDF\u8C03\u7528\u65F6\uFF0C\u7528\u6237\u6001\u7684\u7A0B\u5E8F\u53D1\u8D77\u7CFB\u7EDF\u8C03\u7528\uFF0C\u56E0\u4E3A\u7CFB\u7EDF\u8C03\u7528\u4E2D\u7275\u626F\u7279\u6743\u6307\u4EE4\uFF0C\u7528\u6237\u6001\u7A0B\u5E8F\u6743\u9650\u4E0D\u8DB3\uFF0C\u56E0\u6B64\u4F1A\u4E2D\u65AD\u6267\u884C\uFF0C\u4E5F\u5C31\u662F Trap\uFF08Trap \u662F\u4E00\u79CD\u4E2D\u65AD\uFF09\u3002</p><p>\u53D1\u751F\u4E2D\u65AD\u540E\uFF0C\u5F53\u524D CPU \u6267\u884C\u7684\u7A0B\u5E8F\u4F1A\u4E2D\u65AD\uFF0C\u8DF3\u8F6C\u5230\u4E2D\u65AD\u5904\u7406\u7A0B\u5E8F\uFF0C\u5185\u6838\u7A0B\u5E8F\u5F00\u59CB\u6267\u884C\uFF0C\u4E5F\u5C31\u662F\u5F00\u59CB\u5904\u7406\u7CFB\u7EDF\u8C03\u7528\u3002</p><p>\u5185\u6838\u5904\u7406\u5B8C\u6210\u540E\uFF0C\u4E3B\u52A8\u89E6\u53D1 Trap\uFF0C\u8FD9\u6837\u4F1A\u518D\u6B21\u53D1\u751F\u4E2D\u65AD\uFF0C\u5207\u6362\u56DE\u7528\u6237\u6001\u5DE5\u4F5C\u3002</p><blockquote><p>\u5F02\u5E38</p></blockquote><p>\u5F53CPU\u5728\u6267\u884C\u8FD0\u884C\u5728\u7528\u6237\u6001\u4E0B\u7684\u7A0B\u5E8F\u65F6\uFF0C\u53D1\u751F\u4E86\u67D0\u4E9B\u4E8B\u5148\u4E0D\u53EF\u77E5\u7684\u5F02\u5E38\uFF0C\u8FD9\u65F6\u4F1A\u89E6\u53D1\u7531\u5F53\u524D\u8FD0\u884C\u8FDB\u7A0B\u5207\u6362\u5230\u5904\u7406\u6B64\u5F02\u5E38\u7684\u5185\u6838\u76F8\u5173\u7A0B\u5E8F\u4E2D\uFF0C\u4E5F\u5C31\u8F6C\u5230\u4E86\u5185\u6838\u6001\uFF0C\u6BD4\u5982\u7F3A\u9875\u5F02\u5E38</p><blockquote><p>\u5916\u56F4\u8BBE\u5907\u7684\u4E2D\u65AD</p></blockquote><p>\u5F53\u5916\u56F4\u8BBE\u5907\u5B8C\u6210\u7528\u6237\u8BF7\u6C42\u7684\u64CD\u4F5C\u540E\uFF0C\u4F1A\u5411CPU\u53D1\u51FA\u76F8\u5E94\u7684\u4E2D\u65AD\u4FE1\u53F7\uFF0C\u8FD9\u65F6CPU\u4F1A\u6682\u505C\u6267\u884C\u4E0B\u4E00\u6761\u5373\u5C06\u8981\u6267\u884C\u7684\u6307\u4EE4\u8F6C\u800C\u53BB\u6267\u884C\u4E0E\u4E2D\u65AD\u4FE1\u53F7\u5BF9\u5E94\u7684\u5904\u7406\u7A0B\u5E8F\uFF0C\u5982\u679C\u5148\u524D\u6267\u884C\u7684\u6307\u4EE4\u662F\u7528\u6237\u6001\u4E0B\u7684\u7A0B\u5E8F\uFF0C\u90A3\u4E48\u8FD9\u4E2A\u8F6C\u6362\u7684\u8FC7\u7A0B\u81EA\u7136\u4E5F\u5C31\u53D1\u751F\u4E86\u7531\u7528\u6237\u6001\u5230\u5185\u6838\u6001\u7684\u5207\u6362</p><p>\u6BD4\u5982\u786C\u76D8\u8BFB\u5199\u64CD\u4F5C\u5B8C\u6210\uFF0C\u7CFB\u7EDF\u4F1A\u5207\u6362\u5230\u786C\u76D8\u8BFB\u5199\u7684\u4E2D\u65AD\u5904\u7406\u7A0B\u5E8F\u4E2D\u6267\u884C\u540E\u7EED\u64CD\u4F5C\u7B49</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><h2 id="\u7EBF\u7A0B" tabindex="-1"><a class="header-anchor" href="#\u7EBF\u7A0B" aria-hidden="true">#</a> \u7EBF\u7A0B</h2><p>\u7EBF\u7A0B\uFF1A\u7CFB\u7EDF\u5206\u914D\u5904\u7406\u5668\u65F6\u95F4\u8D44\u6E90\u7684\u57FA\u672C\u5355\u5143\uFF0C\u662F\u7A0B\u5E8F\u6267\u884C\u7684\u6700\u5C0F\u5355\u4F4D</p><p>\u7EBF\u7A0B\u53EF\u4EE5\u770B\u505A\u8F7B\u91CF\u7EA7\u7684\u8FDB\u7A0B\uFF0C\u5171\u4EAB\u5185\u5B58\u7A7A\u95F4\uFF0C\u6BCF\u4E2A\u7EBF\u7A0B\u90FD\u6709\u81EA\u5DF1\u72EC\u7ACB\u7684\u8FD0\u884C\u6808\u548C\u7A0B\u5E8F\u8BA1\u6570\u5668\uFF0C\u7EBF\u7A0B\u4E4B\u95F4\u5207\u6362\u7684\u5F00\u9500\u5C0F\u3002</p><p>\u5728\u540C\u4E00\u4E2A\u8FDB\u7A0B\uFF08\u7A0B\u5E8F\uFF09\u4E2D\u6709\u591A\u4E2A\u7EBF\u7A0B\u540C\u65F6\u6267\u884C\uFF08\u901A\u8FC7CPU\u8C03\u5EA6\uFF0C\u5728\u6BCF\u4E2A\u65F6\u95F4\u7247\u4E2D\u53EA\u6709\u4E00\u4E2A\u7EBF\u7A0B\u6267\u884C\uFF09</p><p>\u8FDB\u7A0B\u53EF\u4EE5\u901A\u8FC7 API \u521B\u5EFA\u7528\u6237\u6001\u7684\u7EBF\u7A0B\uFF0C\u4E5F\u53EF\u4EE5\u901A\u8FC7\u7CFB\u7EDF\u8C03\u7528\u521B\u5EFA\u5185\u6838\u6001\u7684\u7EBF\u7A0B\u3002</p><h3 id="\u7528\u6237\u6001\u7EBF\u7A0B" tabindex="-1"><a class="header-anchor" href="#\u7528\u6237\u6001\u7EBF\u7A0B" aria-hidden="true">#</a> \u7528\u6237\u6001\u7EBF\u7A0B</h3><p>\u7528\u6237\u6001\u7EBF\u7A0B\u4E5F\u79F0\u4F5C\u7528\u6237\u7EA7\u7EBF\u7A0B\uFF0C\u64CD\u4F5C\u7CFB\u7EDF\u5185\u6838\u5E76\u4E0D\u77E5\u9053\u5B83\u7684\u5B58\u5728\uFF0C\u5B83\u5B8C\u5168\u662F\u5728\u7528\u6237\u7A7A\u95F4\u4E2D\u521B\u5EFA\u3002</p><p>\u7528\u6237\u7EA7\u7EBF\u7A0B\u6709\u5F88\u591A\u4F18\u52BF\uFF0C\u6BD4\u5982\uFF1A</p><ul><li><p>\u7BA1\u7406\u5F00\u9500\u5C0F\uFF1A\u521B\u5EFA\u3001\u9500\u6BC1\u4E0D\u9700\u8981\u7CFB\u7EDF\u8C03\u7528\u3002</p></li><li><p>\u5207\u6362\u6210\u672C\u4F4E\uFF1A\u7528\u6237\u7A7A\u95F4\u7A0B\u5E8F\u53EF\u4EE5\u81EA\u5DF1\u7EF4\u62A4\uFF0C\u4E0D\u9700\u8981\u8D70\u64CD\u4F5C\u7CFB\u7EDF\u8C03\u5EA6\u3002</p></li></ul><p>\u4F46\u662F\u8FD9\u79CD\u7EBF\u7A0B\u4E5F\u6709\u5F88\u591A\u7684\u7F3A\u70B9\uFF1A</p><ul><li><p>\u4E0E\u5185\u6838\u534F\u4F5C\u6210\u672C\u9AD8\uFF1A\u6BD4\u5982\u8FD9\u79CD\u7EBF\u7A0B\u5B8C\u5168\u662F\u7528\u6237\u7A7A\u95F4\u7A0B\u5E8F\u5728\u7BA1\u7406\uFF0C\u5F53\u5B83\u8FDB\u884C I/O \u7684\u65F6\u5019\uFF0C\u65E0\u6CD5\u5229\u7528\u5230\u5185\u6838\u7684\u4F18\u52BF\uFF0C\u9700\u8981\u9891\u7E41\u8FDB\u884C\u7528\u6237\u6001\u5230\u5185\u6838\u6001\u7684\u5207\u6362\u3002</p></li><li><p>\u7EBF\u7A0B\u95F4\u534F\u4F5C\u6210\u672C\u9AD8\uFF1A\u8BBE\u60F3\u4E24\u4E2A\u7EBF\u7A0B\u9700\u8981\u901A\u4FE1\uFF0C\u901A\u4FE1\u9700\u8981 I/O\uFF0CI/O \u9700\u8981\u7CFB\u7EDF\u8C03\u7528\uFF0C\u56E0\u6B64\u7528\u6237\u6001\u7EBF\u7A0B\u9700\u8981\u989D\u5916\u7684\u7CFB\u7EDF\u8C03\u7528\u6210\u672C\u3002</p></li><li><p>\u65E0\u6CD5\u5229\u7528\u591A\u6838\u4F18\u52BF\uFF1A\u6BD4\u5982\u64CD\u4F5C\u7CFB\u7EDF\u8C03\u5EA6\u7684\u4ECD\u7136\u662F\u8FD9\u4E2A\u7EBF\u7A0B\u6240\u5C5E\u7684\u8FDB\u7A0B\uFF0C\u6240\u4EE5\u65E0\u8BBA\u6BCF\u6B21\u4E00\u4E2A\u8FDB\u7A0B\u6709\u591A\u5C11\u7528\u6237\u6001\u7684\u7EBF\u7A0B\uFF0C\u90FD\u53EA\u80FD\u5E76\u53D1\u6267\u884C\u4E00\u4E2A\u7EBF\u7A0B\uFF0C\u56E0\u6B64\u4E00\u4E2A\u8FDB\u7A0B\u7684\u591A\u4E2A\u7EBF\u7A0B\u65E0\u6CD5\u5229\u7528\u591A\u6838\u7684\u4F18\u52BF\u3002</p></li></ul><p>\u64CD\u4F5C\u7CFB\u7EDF\u65E0\u6CD5\u9488\u5BF9\u7EBF\u7A0B\u8C03\u5EA6\u8FDB\u884C\u4F18\u5316\uFF1A\u5F53\u4E00\u4E2A\u8FDB\u7A0B\u7684\u4E00\u4E2A\u7528\u6237\u6001\u7EBF\u7A0B\u963B\u585E\uFF08Block\uFF09\u4E86\uFF0C\u64CD\u4F5C\u7CFB\u7EDF\u65E0\u6CD5\u53CA\u65F6\u53D1\u73B0\u548C\u5904\u7406\u963B\u585E\u95EE\u9898\uFF0C\u5B83\u4E0D\u4F1A\u66F4\u6362\u6267\u884C\u5176\u4ED6\u7EBF\u7A0B\uFF0C\u4ECE\u800C\u9020\u6210\u8D44\u6E90\u6D6A\u8D39\u3002</p><h3 id="\u5185\u6838\u6001\u7EBF\u7A0B" tabindex="-1"><a class="header-anchor" href="#\u5185\u6838\u6001\u7EBF\u7A0B" aria-hidden="true">#</a> \u5185\u6838\u6001\u7EBF\u7A0B</h3><p>\u5185\u6838\u6001\u7EBF\u7A0B\u4E5F\u79F0\u4F5C\u5185\u6838\u7EA7\u7EBF\u7A0B\uFF08Kernel Level Thread\uFF09\uFF0C\u8FD9\u79CD\u7EBF\u7A0B\u6267\u884C\u5728\u5185\u6838\u6001\uFF0C\u53EF\u4EE5\u901A\u8FC7\u7CFB\u7EDF\u8C03\u7528\u521B\u9020\u4E00\u4E2A\u5185\u6838\u7EA7\u7EBF\u7A0B\u3002</p><p>\u5185\u6838\u7EA7\u7EBF\u7A0B\u6709\u5F88\u591A\u4F18\u52BF\uFF1A</p><ul><li><p>\u53EF\u4EE5\u5229\u7528\u591A\u6838 CPU \u4F18\u52BF\uFF1A\u5185\u6838\u62E5\u6709\u8F83\u9AD8\u6743\u9650\uFF0C\u56E0\u6B64\u53EF\u4EE5\u5728\u591A\u4E2A CPU \u6838\u5FC3\u4E0A\u6267\u884C\u5185\u6838\u7EBF\u7A0B\u3002</p></li><li><p>\u64CD\u4F5C\u7CFB\u7EDF\u7EA7\u4F18\u5316\uFF1A\u5185\u6838\u4E2D\u7684\u7EBF\u7A0B\u64CD\u4F5C I/O \u4E0D\u9700\u8981\u8FDB\u884C\u7CFB\u7EDF\u8C03\u7528\uFF1B\u4E00\u4E2A\u5185\u6838\u7EBF\u7A0B\u963B\u585E\u4E86\uFF0C\u53EF\u4EE5\u7ACB\u5373\u8BA9\u53E6\u4E00\u4E2A\u6267\u884C\u3002</p></li></ul><p>\u5F53\u7136\u5185\u6838\u7EBF\u7A0B\u4E5F\u6709\u4E00\u4E9B\u7F3A\u70B9\uFF1A</p><ul><li><p>\u521B\u5EFA\u6210\u672C\u9AD8\uFF1A\u521B\u5EFA\u7684\u65F6\u5019\u9700\u8981\u7CFB\u7EDF\u8C03\u7528\uFF0C\u4E5F\u5C31\u662F\u5207\u6362\u5230\u5185\u6838\u6001\u3002</p></li><li><p>\u6269\u5C55\u6027\u5DEE\uFF1A\u7531\u4E00\u4E2A\u5185\u6838\u7A0B\u5E8F\u7BA1\u7406\uFF0C\u4E0D\u53EF\u80FD\u6570\u91CF\u592A\u591A\u3002</p></li><li><p>\u5207\u6362\u6210\u672C\u8F83\u9AD8\uFF1A\u5207\u6362\u7684\u65F6\u5019\uFF0C\u4E5F\u540C\u6837\u5B58\u5728\u9700\u8981\u5185\u6838\u64CD\u4F5C\uFF0C\u9700\u8981\u5207\u6362\u5185\u6838\u6001\u3002</p></li></ul><p><strong>\u7528\u6237\u6001\u7EBF\u7A0B\u548C\u5185\u6838\u6001\u7EBF\u7A0B\u4E4B\u95F4\u7684\u6620\u5C04\u5173\u7CFB</strong></p><p>\u5982\u679C\u6709\u4E00\u4E2A\u7528\u6237\u6001\u7684\u8FDB\u7A0B\uFF0C\u5B83\u4E0B\u9762\u6709\u591A\u4E2A\u7EBF\u7A0B\uFF0C\u5982\u679C\u8FD9\u4E2A\u8FDB\u7A0B\u60F3\u8981\u6267\u884C\u4E0B\u9762\u7684\u67D0\u4E00\u4E2A\u7EBF\u7A0B\uFF0C\u5E94\u8BE5\u5982\u4F55\u505A\u5462\uFF1F</p><blockquote><p>\u8FD9\u65F6\uFF0C\u6BD4\u8F83\u5E38\u89C1\u7684\u4E00\u79CD\u65B9\u5F0F\uFF0C\u5C31\u662F\u5C06\u9700\u8981\u6267\u884C\u7684\u7A0B\u5E8F\uFF0C\u8BA9\u4E00\u4E2A\u5185\u6838\u7EBF\u7A0B\u53BB\u6267\u884C\u3002</p></blockquote><p>\u6BD5\u7ADF\uFF0C\u5185\u6838\u7EBF\u7A0B\u662F\u771F\u6B63\u7684\u7EBF\u7A0B\uFF0C\u56E0\u4E3A\u5B83\u4F1A\u5206\u914D\u5230 CPU \u7684\u6267\u884C\u8D44\u6E90\u3002</p><p>\u5982\u679C\u4E00\u4E2A\u8FDB\u7A0B\u6240\u6709\u7684\u7EBF\u7A0B\u90FD\u8981\u81EA\u5DF1\u8C03\u5EA6\uFF0C\u76F8\u5F53\u4E8E\u5728\u8FDB\u7A0B\u7684\u4E3B\u7EBF\u7A0B\u4E2D\u5B9E\u73B0\u5206\u65F6\u7B97\u6CD5\u8C03\u5EA6\u6BCF\u4E00\u4E2A\u7EBF\u7A0B\uFF0C\u4E5F\u5C31\u662F\u6240\u6709\u7EBF\u7A0B\u90FD\u7528\u64CD\u4F5C\u7CFB\u7EDF\u5206\u914D\u7ED9\u4E3B\u7EBF\u7A0B\u7684\u65F6\u95F4\u7247\u6BB5\u6267\u884C\u3002</p><blockquote><p>\u8FD9\u79CD\u505A\u6CD5\uFF0C\u76F8\u5F53\u4E8E\u64CD\u4F5C\u7CFB\u7EDF\u8C03\u5EA6\u8FDB\u7A0B\u7684\u4E3B\u7EBF\u7A0B\uFF1B\u8FDB\u7A0B\u7684\u4E3B\u7EBF\u7A0B\u8FDB\u884C\u4E8C\u7EA7\u8C03\u5EA6\uFF0C\u8C03\u5EA6\u81EA\u5DF1\u5185\u90E8\u7684\u7EBF\u7A0B\u3002</p></blockquote><p>\u8FD9\u6837\u64CD\u4F5C\u52A3\u52BF\u975E\u5E38\u660E\u663E\uFF0C\u6BD4\u5982\u65E0\u6CD5\u5229\u7528\u591A\u6838\u4F18\u52BF\uFF0C\u6BCF\u4E2A\u7EBF\u7A0B\u8C03\u5EA6\u5206\u914D\u5230\u7684\u65F6\u95F4\u8F83\u5C11\uFF0C\u800C\u4E14\u8FD9\u79CD\u7EBF\u7A0B\u5728\u963B\u585E\u573A\u666F\u4E0B\u4F1A\u76F4\u63A5\u4EA4\u51FA\u6574\u4E2A\u8FDB\u7A0B\u7684\u6267\u884C\u6743\u9650\u3002</p><p>\u7531\u6B64\u53EF\u89C1\uFF0C\u7528\u6237\u6001\u7EBF\u7A0B\u521B\u5EFA\u6210\u672C\u4F4E\uFF0C\u95EE\u9898\u660E\u663E\uFF0C\u4E0D\u53EF\u4EE5\u5229\u7528\u591A\u6838\u3002</p><p>\u5185\u6838\u6001\u7EBF\u7A0B\uFF0C\u521B\u5EFA\u6210\u672C\u9AD8\uFF0C\u53EF\u4EE5\u5229\u7528\u591A\u6838\uFF0C\u5207\u6362\u901F\u5EA6\u6162\u3002</p><p>\u56E0\u6B64\u901A\u5E38\u6211\u4EEC\u4F1A\u5728\u5185\u6838\u4E2D\u9884\u5148\u521B\u5EFA\u4E00\u4E9B\u7EBF\u7A0B\uFF0C\u5E76\u53CD\u590D\u5229\u7528\u8FD9\u4E9B\u7EBF\u7A0B\u3002</p><h3 id="\u534F\u7A0B" tabindex="-1"><a class="header-anchor" href="#\u534F\u7A0B" aria-hidden="true">#</a> \u534F\u7A0B</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/os-586071a1-3d5f-4873-963f-d47b8aeea594.png" alt=""></p><p>\u534F\u7A0B\uFF0C\u662F\u4E00\u79CD\u6BD4\u7EBF\u7A0B\u66F4\u52A0\u8F7B\u91CF\u7EA7\u7684\u5B58\u5728\uFF0C\u534F\u7A0B\u4E0D\u662F\u88AB\u64CD\u4F5C\u7CFB\u7EDF\u5185\u6838\u6240\u7BA1\u7406\uFF0C\u800C\u5B8C\u5168\u662F\u7531\u7A0B\u5E8F\u6240\u63A7\u5236\uFF08\u4E5F\u5C31\u662F\u5728\u7528\u6237\u6001\u6267\u884C\uFF09\u3002</p><p>\u8FD9\u6837\u5E26\u6765\u7684\u597D\u5904\u5C31\u662F\u6027\u80FD\u5F97\u5230\u4E86\u5F88\u5927\u7684\u63D0\u5347\uFF0C\u4E0D\u4F1A\u50CF\u7EBF\u7A0B\u5207\u6362\u90A3\u6837\u6D88\u8017\u8D44\u6E90\u3002</p><p><strong>\u5B50\u7A0B\u5E8F</strong></p><p>\u6216\u8005\u79F0\u4E3A\u51FD\u6570\uFF0C\u5728\u6240\u6709\u8BED\u8A00\u4E2D\u90FD\u662F\u5C42\u7EA7\u8C03\u7528\uFF0C\u6BD4\u5982A\u8C03\u7528B\uFF0CB\u5728\u6267\u884C\u8FC7\u7A0B\u4E2D\u53C8\u8C03\u7528\u4E86C\uFF0CC\u6267\u884C\u5B8C\u6BD5\u8FD4\u56DE\uFF0CB\u6267\u884C\u5B8C\u6BD5\u8FD4\u56DE\uFF0C\u6700\u540E\u662FA\u6267\u884C\u5B8C\u6BD5\u3002</p><p>\u6240\u4EE5\u5B50\u7A0B\u5E8F\u8C03\u7528\u662F\u901A\u8FC7\u6808\u5B9E\u73B0\u7684\uFF0C\u4E00\u4E2A\u7EBF\u7A0B\u5C31\u662F\u6267\u884C\u4E00\u4E2A\u5B50\u7A0B\u5E8F\u3002</p><p>\u5B50\u7A0B\u5E8F\u8C03\u7528\u603B\u662F\u4E00\u4E2A\u5165\u53E3\uFF0C\u4E00\u6B21\u8FD4\u56DE\uFF0C\u8C03\u7528\u987A\u5E8F\u662F\u660E\u786E\u7684\u3002</p><p><strong>\u534F\u7A0B\u7684\u7279\u70B9\u5728\u4E8E\u662F\u4E00\u4E2A\u7EBF\u7A0B\u6267\u884C\uFF0C\u90A3\u548C\u591A\u7EBF\u7A0B\u6BD4\uFF0C\u534F\u7A0B\u6709\u4F55\u4F18\u52BF\uFF1F</strong></p><ul><li>\u6781\u9AD8\u7684\u6267\u884C\u6548\u7387\uFF1A\u56E0\u4E3A\u5B50\u7A0B\u5E8F\u5207\u6362\u4E0D\u662F\u7EBF\u7A0B\u5207\u6362\uFF0C\u800C\u662F\u7531\u7A0B\u5E8F\u81EA\u8EAB\u63A7\u5236\uFF0C\u56E0\u6B64\uFF0C\u6CA1\u6709\u7EBF\u7A0B\u5207\u6362\u7684\u5F00\u9500\uFF0C\u548C\u591A\u7EBF\u7A0B\u6BD4\uFF0C\u7EBF\u7A0B\u6570\u91CF\u8D8A\u591A\uFF0C\u534F\u7A0B\u7684\u6027\u80FD\u4F18\u52BF\u5C31\u8D8A\u660E\u663E\uFF1B</li><li>\u4E0D\u9700\u8981\u591A\u7EBF\u7A0B\u7684\u9501\u673A\u5236\uFF1A\u56E0\u4E3A\u53EA\u6709\u4E00\u4E2A\u7EBF\u7A0B\uFF0C\u4E5F\u4E0D\u5B58\u5728\u540C\u65F6\u5199\u53D8\u91CF\u51B2\u7A81\uFF0C\u5728\u534F\u7A0B\u4E2D\u63A7\u5236\u5171\u4EAB\u8D44\u6E90\u4E0D\u52A0\u9501\uFF0C\u53EA\u9700\u8981\u5224\u65AD\u72B6\u6001\u5C31\u597D\u4E86\uFF0C\u6240\u4EE5\u6267\u884C\u6548\u7387\u6BD4\u591A\u7EBF\u7A0B\u9AD8\u5F88\u591A\u3002</li></ul><h3 id="\u7EBF\u7A0B\u5B89\u5168" tabindex="-1"><a class="header-anchor" href="#\u7EBF\u7A0B\u5B89\u5168" aria-hidden="true">#</a> \u7EBF\u7A0B\u5B89\u5168</h3><p>\u5982\u679C\u4F60\u7684\u4EE3\u7801\u6240\u5728\u7684\u8FDB\u7A0B\u4E2D\u6709\u591A\u4E2A\u7EBF\u7A0B\u5728\u540C\u65F6\u8FD0\u884C\uFF0C\u800C\u8FD9\u4E9B\u7EBF\u7A0B\u53EF\u80FD\u4F1A\u540C\u65F6\u8FD0\u884C\u8FD9\u6BB5\u4EE3\u7801\u3002</p><p>\u5982\u679C\u6BCF\u6B21\u8FD0\u884C\u7ED3\u679C\u548C\u5355\u7EBF\u7A0B\u8FD0\u884C\u7684\u7ED3\u679C\u662F\u4E00\u6837\u7684\uFF0C\u800C\u4E14\u5176\u4ED6\u7684\u53D8\u91CF\u7684\u503C\u4E5F\u548C\u9884\u671F\u7684\u662F\u4E00\u6837\u7684\uFF0C\u5C31\u662F\u7EBF\u7A0B\u5B89\u5168\u7684\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><h2 id="\u8FDB\u7A0B" tabindex="-1"><a class="header-anchor" href="#\u8FDB\u7A0B" aria-hidden="true">#</a> \u8FDB\u7A0B</h2><p>\u5728\u7CFB\u7EDF\u4E2D\u6B63\u5728\u8FD0\u884C\u7684\u4E00\u4E2A\u5E94\u7528\u7A0B\u5E8F\uFF1B\u7A0B\u5E8F\u4E00\u65E6\u8FD0\u884C\u5C31\u662F\u8FDB\u7A0B\uFF1B\u662F\u8D44\u6E90\u5206\u914D\u7684\u6700\u5C0F\u5355\u4F4D\u3002</p><p>\u5728\u64CD\u4F5C\u7CFB\u7EDF\u4E2D\u80FD\u540C\u65F6\u8FD0\u884C\u591A\u4E2A\u8FDB\u7A0B\uFF1B</p><p>\u5F00\u673A\u7684\u65F6\u5019\uFF0C\u78C1\u76D8\u7684\u5185\u6838\u955C\u50CF\u88AB\u5BFC\u5165\u5185\u5B58\u4F5C\u4E3A\u4E00\u4E2A\u6267\u884C\u526F\u672C\uFF0C\u6210\u4E3A\u5185\u6838\u8FDB\u7A0B\u3002</p><p>\u8FDB\u7A0B\u53EF\u4EE5\u5206\u6210<strong>\u7528\u6237\u6001\u8FDB\u7A0B\u548C\u5185\u6838\u6001\u8FDB\u7A0B</strong>\u4E24\u7C7B\uFF0C\u7528\u6237\u6001\u8FDB\u7A0B\u901A\u5E38\u662F\u5E94\u7528\u7A0B\u5E8F\u7684\u526F\u672C\uFF0C\u5185\u6838\u6001\u8FDB\u7A0B\u5C31\u662F\u5185\u6838\u672C\u8EAB\u7684\u8FDB\u7A0B\u3002</p><p>\u5982\u679C\u7528\u6237\u6001\u8FDB\u7A0B\u9700\u8981\u7533\u8BF7\u8D44\u6E90\uFF0C\u6BD4\u5982\u5185\u5B58\uFF0C\u53EF\u4EE5\u901A\u8FC7\u7CFB\u7EDF\u8C03\u7528\u5411\u5185\u6838\u7533\u8BF7\u3002</p><p>\u6BCF\u4E2A\u8FDB\u7A0B\u90FD\u6709\u72EC\u7ACB\u7684\u5185\u5B58\u7A7A\u95F4\uFF0C\u5B58\u653E\u4EE3\u7801\u548C\u6570\u636E\u6BB5\u7B49\uFF0C\u7A0B\u5E8F\u4E4B\u95F4\u7684\u5207\u6362\u4F1A\u6709\u8F83\u5927\u7684\u5F00\u9500\uFF1B</p><p><strong>\u5206\u65F6\u548C\u8C03\u5EA6</strong></p><p>\u6BCF\u4E2A\u8FDB\u7A0B\u5728\u6267\u884C\u65F6\u90FD\u4F1A\u83B7\u5F97\u64CD\u4F5C\u7CFB\u7EDF\u5206\u914D\u7684\u4E00\u4E2A\u65F6\u95F4\u7247\u6BB5\uFF0C\u5982\u679C\u8D85\u51FA\u8FD9\u4E2A\u65F6\u95F4\uFF0C\u5C31\u4F1A\u8F6E\u5230\u4E0B\u4E00\u4E2A\u8FDB\u7A0B\uFF08\u7EBF\u7A0B\uFF09\u6267\u884C\u3002</p><blockquote><p>\u6CE8\u610F\uFF0C\u73B0\u4EE3\u64CD\u4F5C\u7CFB\u7EDF\u90FD\u662F\u76F4\u63A5\u8C03\u5EA6\u7EBF\u7A0B\uFF0C\u4E0D\u4F1A\u8C03\u5EA6\u8FDB\u7A0B\u3002</p></blockquote><p><strong>\u5206\u914D\u65F6\u95F4\u7247\u6BB5</strong></p><p>\u5982\u4E0B\u56FE\u6240\u793A\uFF0C\u8FDB\u7A0B 1 \u9700\u8981 2 \u4E2A\u65F6\u95F4\u7247\u6BB5\uFF0C\u8FDB\u7A0B 2 \u53EA\u6709 1 \u4E2A\u65F6\u95F4\u7247\u6BB5\uFF0C\u8FDB\u7A0B 3 \u9700\u8981 3 \u4E2A\u65F6\u95F4\u7247\u6BB5\u3002</p><p>\u56E0\u6B64\u5F53\u8FDB\u7A0B 1 \u6267\u884C\u5230\u4E00\u534A\u65F6\uFF0C\u4F1A\u5148\u6302\u8D77\uFF0C\u7136\u540E\u8FDB\u7A0B 2 \u5F00\u59CB\u6267\u884C\uFF1B\u8FDB\u7A0B 2 \u4E00\u6B21\u53EF\u4EE5\u6267\u884C\u5B8C\uFF0C\u7136\u540E\u8FDB\u7A0B 3 \u5F00\u59CB\u6267\u884C\uFF0C\u4E0D\u8FC7\u8FDB\u7A0B 3 \u4E00\u6B21\u6267\u884C\u4E0D\u5B8C\uFF0C\u5728\u6267\u884C\u4E86 1 \u4E2A\u65F6\u95F4\u7247\u6BB5\u540E\uFF0C\u8FDB\u7A0B 1 \u5F00\u59CB\u6267\u884C\uFF1B\u5C31\u8FD9\u6837\u5982\u6B64\u5468\u800C\u590D\u59CB\uFF0C\u8FD9\u4E2A\u5C31\u662F\u5206\u65F6\u6280\u672F\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/os-606eb7bd-e9e1-457a-bf61-66b152c5ada5.png" alt=""></p><h3 id="\u521B\u5EFA\u8FDB\u7A0B" tabindex="-1"><a class="header-anchor" href="#\u521B\u5EFA\u8FDB\u7A0B" aria-hidden="true">#</a> \u521B\u5EFA\u8FDB\u7A0B</h3><p>\u7528\u6237\u60F3\u8981\u521B\u5EFA\u4E00\u4E2A\u8FDB\u7A0B\uFF0C\u6700\u76F4\u63A5\u7684\u65B9\u6CD5\u5C31\u662F\u4ECE\u547D\u4EE4\u884C\u6267\u884C\u4E00\u4E2A\u7A0B\u5E8F\uFF0C\u6216\u8005\u53CC\u51FB\u6253\u5F00\u4E00\u4E2A\u5E94\u7528\uFF0C\u4F46\u5BF9\u4E8E\u7A0B\u5E8F\u5458\u800C\u8A00\uFF0C\u663E\u7136\u9700\u8981\u66F4\u597D\u7684\u8BBE\u8BA1\u3002</p><p>\u9996\u5148\uFF0C\u5E94\u8BE5\u6709 API \u6253\u5F00\u5E94\u7528\uFF0C\u6BD4\u5982\u53EF\u4EE5\u901A\u8FC7\u51FD\u6570\u6253\u5F00\u67D0\u4E2A\u5E94\u7528\uFF1B</p><p>\u53E6\u4E00\u65B9\u9762\uFF0C\u5982\u679C\u7A0B\u5E8F\u5458\u5E0C\u671B\u6267\u884C\u5B8C\u4E00\u6BB5\u4EE3\u4EF7\u6602\u8D35\u7684\u521D\u59CB\u5316\u8FC7\u7A0B\u540E\uFF0C\u5C06\u5F53\u524D\u7A0B\u5E8F\u7684\u72B6\u6001\u590D\u5236\u597D\u51E0\u4EFD\uFF0C\u53D8\u6210\u4E00\u4E2A\u4E2A\u5355\u72EC\u6267\u884C\u7684\u8FDB\u7A0B\uFF0C\u90A3\u4E48\u64CD\u4F5C\u7CFB\u7EDF\u63D0\u4F9B\u4E86 fork \u6307\u4EE4\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/os-85a86f1b-eeff-401e-8bfe-19e5509e2a53.png" alt=""></p><p>\u4E5F\u5C31\u662F\u8BF4\uFF0C\u6BCF\u6B21 fork \u4F1A\u591A\u521B\u9020\u4E00\u4E2A\u514B\u9686\u7684\u8FDB\u7A0B\uFF0C\u8FD9\u4E2A\u514B\u9686\u7684\u8FDB\u7A0B\uFF0C\u6240\u6709\u72B6\u6001\u90FD\u548C\u539F\u6765\u7684\u8FDB\u7A0B\u4E00\u6837\uFF0C\u4F46\u662F\u4F1A\u6709\u81EA\u5DF1\u7684\u5730\u5740\u7A7A\u95F4\u3002</p><p>\u5982\u679C\u8981\u521B\u9020 2 \u4E2A\u514B\u9686\u8FDB\u7A0B\uFF0C\u5C31\u8981 fork \u4E24\u6B21\u3002</p><blockquote><p>\u90A3\u5982\u679C\u6211\u5C31\u662F\u60F3\u542F\u52A8\u4E00\u4E2A\u65B0\u7684\u7A0B\u5E8F\u5462\uFF1F</p></blockquote><p>\u64CD\u4F5C\u7CFB\u7EDF\u63D0\u4F9B\u4E86\u542F\u52A8\u65B0\u7A0B\u5E8F\u7684 API\u3002</p><p>\u5982\u679C\u6211\u5C31\u662F\u60F3\u7528\u4E00\u4E2A\u65B0\u8FDB\u7A0B\u6267\u884C\u4E00\u5C0F\u6BB5\u7A0B\u5E8F\uFF0C\u6BD4\u5982\u8BF4\u6BCF\u6B21\u670D\u52A1\u7AEF\u6536\u5230\u5BA2\u6237\u7AEF\u7684\u8BF7\u6C42\u65F6\uFF0C\u6211\u90FD\u60F3\u7528\u4E00\u4E2A\u8FDB\u7A0B\u53BB\u5904\u7406\u8FD9\u4E2A\u8BF7\u6C42\u3002</p><p>\u5982\u679C\u662F\u8FD9\u79CD\u60C5\u51B5\uFF0C\u5EFA\u8BAE\u4F60\u4E0D\u8981\u5355\u72EC\u542F\u52A8\u8FDB\u7A0B\uFF0C\u800C\u662F\u4F7F\u7528\u7EBF\u7A0B\u3002</p><p>\u56E0\u4E3A\u8FDB\u7A0B\u7684\u521B\u5EFA\u6210\u672C\u5B9E\u5728\u592A\u9AD8\u4E86\uFF0C\u56E0\u6B64\u4E0D\u5EFA\u8BAE\u7528\u6765\u505A\u8FD9\u6837\u7684\u4E8B\u60C5\uFF1A\u8981\u521B\u5EFA\u6761\u76EE\u3001\u8981\u5206\u914D\u5185\u5B58\uFF0C\u7279\u522B\u662F\u8FD8\u8981\u5728\u5185\u5B58\u4E2D\u5F62\u6210\u4E00\u4E2A\u4E2A\u6BB5\uFF0C\u5206\u6210\u4E0D\u540C\u7684\u533A\u57DF\u3002\u6240\u4EE5\u901A\u5E38\uFF0C\u6211\u4EEC\u66F4\u503E\u5411\u4E8E\u591A\u521B\u5EFA\u7EBF\u7A0B\u3002</p><p>\u4E0D\u540C\u7A0B\u5E8F\u8BED\u8A00\u4F1A\u81EA\u5DF1\u63D0\u4F9B\u521B\u5EFA\u7EBF\u7A0B\u7684 API\uFF0C\u6BD4\u5982 Java \u6709 Thread \u7C7B\uFF1Bgo \u6709 go-routine\uFF08\u6CE8\u610F\u4E0D\u662F\u534F\u7A0B\uFF0C\u662F\u7EBF\u7A0B\uFF09\u3002</p><h3 id="\u8FDB\u7A0B\u72B6\u6001" tabindex="-1"><a class="header-anchor" href="#\u8FDB\u7A0B\u72B6\u6001" aria-hidden="true">#</a> \u8FDB\u7A0B\u72B6\u6001</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/os-5f202fa5-0922-4b41-b4f2-f8a9af37a176.png" alt=""></p><p><strong>\u521B\u5EFA\u72B6\u6001</strong></p><p>\u8FDB\u7A0B\u7531\u521B\u5EFA\u800C\u4EA7\u751F\uFF0C\u521B\u5EFA\u8FDB\u7A0B\u662F\u4E00\u4E2A\u975E\u5E38\u590D\u6742\u7684\u8FC7\u7A0B\uFF0C\u4E00\u822C\u9700\u8981\u901A\u8FC7\u591A\u4E2A\u6B65\u9AA4\u624D\u80FD\u5B8C\u6210\uFF1A\u5982\u9996\u5148\u7531\u8FDB\u7A0B\u7533\u8BF7\u4E00\u4E2A\u7A7A\u767D\u7684\u8FDB\u7A0B\u63A7\u5236\u5757(PCB)\uFF0C\u5E76\u5411PCB\u4E2D\u586B\u5199\u7528\u4E8E\u63A7\u5236\u548C\u7BA1\u7406\u8FDB\u7A0B\u7684\u4FE1\u606F\uFF1B\u7136\u540E\u4E3A\u8BE5\u8FDB\u7A0B\u5206\u914D\u8FD0\u884C\u65F6\u6240\u5FC5\u987B\u7684\u8D44\u6E90\uFF1B\u6700\u540E\uFF0C\u628A\u8BE5\u8FDB\u7A0B\u8F6C\u5165\u5C31\u7EEA\u72B6\u6001\u5E76\u63D2\u5165\u5230\u5C31\u7EEA\u961F\u5217\u4E2D</p><p><strong>\u5C31\u7EEA\u72B6\u6001</strong></p><p>\u8FD9\u662F\u6307\u8FDB\u7A0B\u5DF2\u7ECF\u51C6\u5907\u597D\u8FD0\u884C\u7684\u72B6\u6001\uFF0C\u5373\u8FDB\u7A0B\u5DF2\u5206\u914D\u5230\u9664CPU\u4EE5\u5916\u6240\u6709\u7684\u5FC5\u8981\u8D44\u6E90\u540E\uFF0C\u53EA\u8981\u518D\u83B7\u5F97CPU\uFF0C\u4FBF\u53EF\u7ACB\u5373\u6267\u884C\uFF0C\u5982\u679C\u7CFB\u7EDF\u4E2D\u6709\u8BB8\u591A\u5904\u4E8E\u5C31\u7EEA\u72B6\u6001\u7684\u8FDB\u7A0B\uFF0C\u901A\u5E38\u5C06\u5B83\u4EEC\u6309\u7167\u4E00\u5B9A\u7684\u7B56\u7565\u6392\u6210\u4E00\u4E2A\u961F\u5217\uFF0C\u8BE5\u961F\u5217\u79F0\u4E3A\u5C31\u7EEA\u961F\u5217\uFF0C\u6709\u6267\u884C\u8D44\u683C\uFF0C\u6CA1\u6709\u6267\u884C\u6743\u7684\u8FDB\u7A0B</p><p><strong>\u8FD0\u884C\u72B6\u6001</strong></p><p>\u8FD9\u91CC\u6307\u8FDB\u7A0B\u5DF2\u7ECF\u83B7\u53D6CPU\uFF0C\u5176\u8FDB\u7A0B\u5904\u4E8E\u6B63\u5728\u6267\u884C\u7684\u72B6\u6001\u3002\u5BF9\u4EFB\u4F55\u4E00\u4E2A\u65F6\u523B\u800C\u8A00\uFF0C\u5728\u5355\u5904\u7406\u673A\u7684\u7CFB\u7EDF\u4E2D\uFF0C\u53EA\u6709\u4E00\u4E2A\u8FDB\u7A0B\u5904\u4E8E\u6267\u884C\u72B6\u6001\u800C\u5728\u591A\u5904\u7406\u673A\u7CFB\u7EDF\u4E2D\uFF0C\u6709\u591A\u4E2A\u8FDB\u7A0B\u5904\u4E8E\u6267\u884C\u72B6\u6001\uFF0C\u65E2\u6709\u6267\u884C\u8D44\u683C\uFF0C\u53C8\u6709\u6267\u884C\u6743\u7684\u8FDB\u7A0B</p><p><strong>\u963B\u585E\u72B6\u6001</strong></p><p>\u8FD9\u91CC\u662F\u6307\u6B63\u5728\u6267\u884C\u7684\u8FDB\u7A0B\u7531\u4E8E\u53D1\u751F\u67D0\u4E8B\u4EF6\uFF08\u5982I/O\u8BF7\u6C42\u3001\u7533\u8BF7\u7F13\u51B2\u533A\u5931\u8D25\u7B49\uFF09\u6682\u65F6\u65E0\u6CD5\u7EE7\u7EED\u6267\u884C\u7684\u72B6\u6001\uFF0C\u5373\u8FDB\u7A0B\u6267\u884C\u53D7\u5230\u963B\u585E\uFF0C\u6B64\u65F6\u5F15\u8D77\u8FDB\u7A0B\u8C03\u5EA6\uFF0C\u64CD\u4F5C\u7CFB\u7EDF\u628A\u5904\u7406\u673A\u5206\u914D\u7ED9\u53E6\u5916\u4E00\u4E2A\u5C31\u7EEA\u7684\u8FDB\u7A0B\uFF0C\u800C\u8BA9\u53D7\u963B\u7684\u8FDB\u7A0B\u5904\u4E8E\u6682\u505C\u7684\u72B6\u6001\uFF0C\u4E00\u822C\u5C06\u8FD9\u4E2A\u6682\u505C\u72B6\u6001\u79F0\u4E3A\u963B\u585E\u72B6\u6001</p><p><strong>\u7EC8\u6B62\u72B6\u6001</strong></p><h3 id="\u8FDB\u7A0B\u95F4\u901A\u4FE1ipc" tabindex="-1"><a class="header-anchor" href="#\u8FDB\u7A0B\u95F4\u901A\u4FE1ipc" aria-hidden="true">#</a> \u8FDB\u7A0B\u95F4\u901A\u4FE1IPC</h3><p>\u6BCF\u4E2A\u8FDB\u7A0B\u5404\u81EA\u6709\u4E0D\u540C\u7684\u7528\u6237\u5730\u5740\u7A7A\u95F4\uFF0C\u4EFB\u4F55\u4E00\u4E2A\u8FDB\u7A0B\u7684\u5168\u5C40\u53D8\u91CF\u5728\u53E6\u4E00\u4E2A\u8FDB\u7A0B\u4E2D\u90FD\u770B\u4E0D\u5230\uFF0C\u6240\u4EE5\u8FDB\u7A0B\u4E4B\u95F4\u8981\u4EA4\u6362\u6570\u636E\u5FC5\u987B\u901A\u8FC7\u5185\u6838\uFF0C\u5728\u5185\u6838\u4E2D\u5F00\u8F9F\u4E00\u5757\u7F13\u51B2\u533A\uFF0C\u8FDB\u7A0B1\u628A\u6570\u636E\u4ECE\u7528\u6237\u7A7A\u95F4\u62F7\u5230\u5185\u6838\u7F13\u51B2\u533A\uFF0C\u8FDB\u7A0B2\u518D\u4ECE\u5185\u6838\u7F13\u51B2\u533A\u628A\u6570\u636E\u8BFB\u8D70\uFF0C\u5185\u6838\u63D0\u4F9B\u7684\u8FD9\u79CD\u673A\u5236\u79F0\u4E3A\u8FDB\u7A0B\u95F4\u901A\u4FE1</p><p><strong>\u7BA1\u9053/\u533F\u540D\u7BA1\u9053</strong></p><p>\u7BA1\u9053\u662F\u534A\u53CC\u5DE5\u7684\uFF0C\u6570\u636E\u53EA\u80FD\u5411\u4E00\u4E2A\u65B9\u5411\u6D41\u52A8\uFF1B\u9700\u8981\u53CC\u65B9\u901A\u4FE1\u65F6\uFF0C\u9700\u8981\u5EFA\u7ACB\u8D77\u4E24\u4E2A\u7BA1\u9053\u3002</p><ul><li><p>\u53EA\u80FD\u7528\u4E8E\u7236\u5B50\u8FDB\u7A0B\u6216\u8005\u5144\u5F1F\u8FDB\u7A0B\u4E4B\u95F4(\u5177\u6709\u4EB2\u7F18\u5173\u7CFB\u7684\u8FDB\u7A0B);</p></li><li><p>\u5355\u72EC\u6784\u6210\u4E00\u79CD\u72EC\u7ACB\u7684\u6587\u4EF6\u7CFB\u7EDF\uFF1A\u7BA1\u9053\u5BF9\u4E8E\u7BA1\u9053\u4E24\u7AEF\u7684\u8FDB\u7A0B\u800C\u8A00\uFF0C\u5C31\u662F\u4E00\u4E2A\u6587\u4EF6\uFF0C\u4F46\u5B83\u4E0D\u662F\u666E\u901A\u7684\u6587\u4EF6\uFF0C\u5B83\u4E0D\u5C5E\u4E8E\u67D0\u79CD\u6587\u4EF6\u7CFB\u7EDF\uFF0C\u800C\u662F\u81EA\u7ACB\u95E8\u6237\uFF0C\u5355\u72EC\u6784\u6210\u4E00\u79CD\u6587\u4EF6\u7CFB\u7EDF\uFF0C\u5E76\u4E14\u53EA\u5B58\u5728\u4E0E\u5185\u5B58\u4E2D\u3002</p></li><li><p>\u6570\u636E\u7684\u8BFB\u51FA\u548C\u5199\u5165\uFF1A\u4E00\u4E2A\u8FDB\u7A0B\u5411\u7BA1\u9053\u4E2D\u5199\u7684\u5185\u5BB9\u88AB\u7BA1\u9053\u53E6\u4E00\u7AEF\u7684\u8FDB\u7A0B\u8BFB\u51FA\uFF0C\u5199\u5165\u7684\u5185\u5BB9\u6BCF\u6B21\u90FD\u6DFB\u52A0\u5728\u7BA1\u9053\u7F13\u51B2\u533A\u7684\u672B\u5C3E\uFF0C\u5E76\u4E14\u6BCF\u6B21\u90FD\u662F\u4ECE\u7F13\u51B2\u533A\u7684\u5934\u90E8\u8BFB\u51FA\u6570\u636E\u3002</p></li></ul><p><strong>\u6709\u540D\u7BA1\u9053(FIFO)</strong></p><p>\u533F\u540D\u7BA1\u9053\uFF0C\u7531\u4E8E\u6CA1\u6709\u540D\u5B57\uFF0C\u53EA\u80FD\u7528\u4E8E\u4EB2\u7F18\u5173\u7CFB\u7684\u8FDB\u7A0B\u95F4\u901A\u4FE1\u3002</p><p>\u4E3A\u4E86\u514B\u670D\u8FD9\u4E2A\u7F3A\u70B9\uFF0C\u63D0\u51FA\u4E86\u6709\u540D\u7BA1\u9053(FIFO)\u3002</p><p>\u6709\u540D\u7BA1\u9053\u4E0D\u540C\u4E8E\u533F\u540D\u7BA1\u9053\u4E4B\u5904\u5728\u4E8E\u5B83\u63D0\u4F9B\u4E86\u4E00\u4E2A\u8DEF\u5F84\u540D\u4E0E\u4E4B\u5173\u8054\uFF0C\u4EE5\u6709\u540D\u7BA1\u9053\u7684\u6587\u4EF6\u5F62\u5F0F\u5B58\u5728\u4E8E\u6587\u4EF6\u7CFB\u7EDF\u4E2D\uFF0C\u8FD9\u6837\uFF0C\u5373\u4F7F\u4E0E\u6709\u540D\u7BA1\u9053\u7684\u521B\u5EFA\u8FDB\u7A0B\u4E0D\u5B58\u5728\u4EB2\u7F18\u5173\u7CFB\u7684\u8FDB\u7A0B\uFF0C\u53EA\u8981\u53EF\u4EE5\u8BBF\u95EE\u8BE5\u8DEF\u5F84\uFF0C\u5C31\u80FD\u591F\u5F7C\u6B64\u901A\u8FC7\u6709\u540D\u7BA1\u9053\u76F8\u4E92\u901A\u4FE1\uFF0C\u56E0\u6B64\uFF0C\u901A\u8FC7\u6709\u540D\u7BA1\u9053\u4E0D\u76F8\u5173\u7684\u8FDB\u7A0B\u4E5F\u80FD\u4EA4\u6362\u6570\u636E\u3002</p><p><strong>\u4FE1\u53F7</strong></p><p>\u4FE1\u53F7\u662FLinux\u7CFB\u7EDF\u4E2D\u7528\u4E8E\u8FDB\u7A0B\u95F4\u4E92\u76F8\u901A\u4FE1\u6216\u8005\u64CD\u4F5C\u7684\u4E00\u79CD\u673A\u5236\uFF0C\u4FE1\u53F7\u53EF\u4EE5\u5728\u4EFB\u4F55\u65F6\u5019\u53D1\u7ED9\u67D0\u4E00\u8FDB\u7A0B\uFF0C\u800C\u65E0\u9700\u77E5\u9053\u8BE5\u8FDB\u7A0B\u7684\u72B6\u6001\u3002</p><p>\u5982\u679C\u8BE5\u8FDB\u7A0B\u5F53\u524D\u5E76\u672A\u5904\u4E8E\u6267\u884C\u72B6\u6001\uFF0C\u5219\u8BE5\u4FE1\u53F7\u5C31\u6709\u5185\u6838\u4FDD\u5B58\u8D77\u6765\uFF0C\u77E5\u9053\u8BE5\u8FDB\u7A0B\u56DE\u590D\u6267\u884C\u5E76\u4F20\u9012\u7ED9\u5B83\u4E3A\u6B62\u3002</p><p>\u5982\u679C\u4E00\u4E2A\u4FE1\u53F7\u88AB\u8FDB\u7A0B\u8BBE\u7F6E\u4E3A\u963B\u585E\uFF0C\u5219\u8BE5\u4FE1\u53F7\u7684\u4F20\u9012\u88AB\u5EF6\u8FDF\uFF0C\u76F4\u5230\u5176\u963B\u585E\u88AB\u53D6\u6D88\u662F\u624D\u88AB\u4F20\u9012\u7ED9\u8FDB\u7A0B\u3002</p><p><strong>\u6D88\u606F\u961F\u5217</strong></p><p>\u6D88\u606F\u961F\u5217\u662F\u5B58\u653E\u5728\u5185\u6838\u4E2D\u7684\u6D88\u606F\u94FE\u8868\uFF0C\u6BCF\u4E2A\u6D88\u606F\u961F\u5217\u7531\u6D88\u606F\u961F\u5217\u6807\u8BC6\u7B26\u8868\u793A\u3002</p><p>\u4E0E\u7BA1\u9053\uFF08\u65E0\u540D\u7BA1\u9053\uFF1A\u53EA\u5B58\u5728\u4E8E\u5185\u5B58\u4E2D\u7684\u6587\u4EF6\uFF1B\u547D\u540D\u7BA1\u9053\uFF1A\u5B58\u5728\u4E8E\u5B9E\u9645\u7684\u78C1\u76D8\u4ECB\u8D28\u6216\u8005\u6587\u4EF6\u7CFB\u7EDF\uFF09\u4E0D\u540C\u7684\u662F\u6D88\u606F\u961F\u5217\u5B58\u653E\u5728\u5185\u6838\u4E2D\uFF0C\u53EA\u6709\u5728\u5185\u6838\u91CD\u542F(\u5373\u64CD\u4F5C\u7CFB\u7EDF\u91CD\u542F)\u6216\u8005\u663E\u793A\u5730\u5220\u9664\u4E00\u4E2A\u6D88\u606F\u961F\u5217\u65F6\uFF0C\u8BE5\u6D88\u606F\u961F\u5217\u624D\u4F1A\u88AB\u771F\u6B63\u7684\u5220\u9664\u3002</p><p>\u53E6\u5916\u4E0E\u7BA1\u9053\u4E0D\u540C\u7684\u662F\uFF0C\u6D88\u606F\u961F\u5217\u5728\u67D0\u4E2A\u8FDB\u7A0B\u5F80\u4E00\u4E2A\u961F\u5217\u5199\u5165\u6D88\u606F\u4E4B\u524D\uFF0C\u5E76\u4E0D\u9700\u8981\u53E6\u5916\u67D0\u4E2A\u8FDB\u7A0B\u5728\u8BE5\u961F\u5217\u4E0A\u7B49\u5F85\u6D88\u606F\u7684\u5230\u8FBE</p><p><strong>\u5171\u4EAB\u5185\u5B58</strong></p><p>\u4F7F\u5F97\u591A\u4E2A\u8FDB\u7A0B\u53EF\u4EE5\u76F4\u63A5\u8BFB\u5199\u540C\u4E00\u5757\u5185\u5B58\u7A7A\u95F4\uFF0C\u662F\u6700\u5FEB\u7684\u53EF\u7528IPC\u5F62\u5F0F\uFF0C\u662F\u9488\u5BF9\u5176\u4ED6\u901A\u4FE1\u673A\u5236\u8FD0\u884C\u6548\u7387\u8F83\u4F4E\u800C\u8BBE\u8BA1\u7684\u3002</p><p>\u4E3A\u4E86\u5728\u591A\u4E2A\u8FDB\u7A0B\u95F4\u4EA4\u6362\u4FE1\u606F\uFF0C\u5185\u6838\u4E13\u95E8\u7559\u51FA\u4E86\u4E00\u5757\u5185\u5B58\u533A\uFF0C\u53EF\u4EE5\u7531\u9700\u8981\u8BBF\u95EE\u7684\u8FDB\u7A0B\u5C06\u5176\u6620\u5C04\u5230\u81EA\u5DF1\u7684\u79C1\u6709\u5730\u5740\u7A7A\u95F4\uFF0C\u8FDB\u7A0B\u5C31\u53EF\u4EE5\u76F4\u63A5\u8BFB\u5199\u8FD9\u4E00\u5757\u5185\u5B58\u800C\u4E0D\u9700\u8981\u8FDB\u884C\u6570\u636E\u7684\u62F7\u8D1D\uFF0C\u4ECE\u800C\u5927\u5927\u63D0\u9AD8\u6548\u7387\u3002</p><p>\u7531\u4E8E\u591A\u4E2A\u8FDB\u7A0B\u5171\u4EAB\u4E00\u6BB5\u5185\u5B58\uFF0C\u56E0\u6B64\u9700\u8981\u4F9D\u9760\u67D0\u79CD\u540C\u6B65\u673A\u5236\uFF08\u5982\u4FE1\u53F7\u91CF\uFF09\u6765\u8FBE\u5230\u8FDB\u7A0B\u95F4\u7684\u540C\u6B65\u53CA\u4E92\u65A5\u3002</p><p>\u5171\u4EAB\u5185\u5B58\u793A\u610F\u56FE\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/os-8644f82a-eda6-4abf-b86a-13c02e7af5fd.png" alt=""></p><p>\u4E00\u65E6\u8FD9\u6837\u7684\u5185\u5B58\u6620\u5C04\u5230\u5171\u4EAB\u5B83\u7684\u8FDB\u7A0B\u7684\u5730\u5740\u7A7A\u95F4\uFF0C\u8FD9\u4E9B\u8FDB\u7A0B\u95F4\u6570\u636E\u4F20\u9012\u4E0D\u518D\u6D89\u53CA\u5230\u5185\u6838\uFF0C\u6362\u53E5\u8BDD\u8BF4\u662F\u8FDB\u7A0B\u4E0D\u518D\u901A\u8FC7\u6267\u884C\u8FDB\u5165\u5185\u6838\u7684\u7CFB\u7EDF\u8C03\u7528\u6765\u4F20\u9012\u5F7C\u6B64\u7684\u6570\u636E\u3002</p><p><strong>\u4FE1\u53F7\u91CF</strong></p><p>\u4FE1\u53F7\u91CF\u662F\u4E00\u4E2A\u8BA1\u6570\u5668\uFF0C\u7528\u4E8E\u591A\u8FDB\u7A0B\u5BF9\u5171\u4EAB\u6570\u636E\u7684\u8BBF\u95EE\uFF0C\u4FE1\u53F7\u91CF\u7684\u610F\u56FE\u5728\u4E8E\u8FDB\u7A0B\u95F4\u540C\u6B65\u3002</p><p>\u4E3A\u4E86\u83B7\u5F97\u5171\u4EAB\u8D44\u6E90\uFF0C\u8FDB\u7A0B\u9700\u8981\u6267\u884C\u4E0B\u5217\u64CD\u4F5C\uFF1A</p><ol><li><p>\u521B\u5EFA\u4E00\u4E2A\u4FE1\u53F7\u91CF\uFF1A\u8FD9\u8981\u6C42\u8C03\u7528\u8005\u6307\u5B9A\u521D\u59CB\u503C\uFF0C\u5BF9\u4E8E\u4E8C\u503C\u4FE1\u53F7\u91CF\u6765\u8BF4\uFF0C\u5B83\u901A\u5E38\u662F1\uFF0C\u4E5F\u53EF\u662F0\u3002</p></li><li><p>\u7B49\u5F85\u4E00\u4E2A\u4FE1\u53F7\u91CF\uFF1A\u8BE5\u64CD\u4F5C\u4F1A\u6D4B\u8BD5\u8FD9\u4E2A\u4FE1\u53F7\u91CF\u7684\u503C\uFF0C\u5982\u679C\u5C0F\u4E8E0\uFF0C\u5C31\u963B\u585E\uFF0C\u4E5F\u79F0\u4E3AP\u64CD\u4F5C\u3002</p></li><li><p>\u6302\u51FA\u4E00\u4E2A\u4FE1\u53F7\u91CF\uFF1A\u8BE5\u64CD\u4F5C\u5C06\u4FE1\u53F7\u91CF\u7684\u503C\u52A01\uFF0C\u4E5F\u79F0\u4E3AV\u64CD\u4F5C\u3002</p></li></ol><p><strong>\u5957\u63A5\u5B57(Socket)</strong></p><p>\u5957\u63A5\u5B57\u662F\u4E00\u79CD\u901A\u4FE1\u673A\u5236\uFF0C\u51ED\u501F\u8FD9\u79CD\u673A\u5236\uFF0C\u5BA2\u6237/\u670D\u52A1\u5668\uFF08\u5373\u8981\u8FDB\u884C\u901A\u4FE1\u7684\u8FDB\u7A0B\uFF09\u7CFB\u7EDF\u7684\u5F00\u53D1\u5DE5\u4F5C\u65E2\u53EF\u4EE5\u5728\u672C\u5730\u5355\u673A\u4E0A\u8FDB\u884C\uFF0C\u4E5F\u53EF\u4EE5\u8DE8\u7F51\u7EDC\u8FDB\u884C\u3002\u4E5F\u5C31\u662F\u8BF4\u5B83\u53EF\u4EE5\u8BA9\u4E0D\u5728\u540C\u4E00\u53F0\u8BA1\u7B97\u673A\u4F46\u901A\u8FC7\u7F51\u7EDC\u8FDE\u63A5\u8BA1\u7B97\u673A\u4E0A\u7684\u8FDB\u7A0B\u8FDB\u884C\u901A\u4FE1\u3002</p><h3 id="\u4FE1\u53F7" tabindex="-1"><a class="header-anchor" href="#\u4FE1\u53F7" aria-hidden="true">#</a> \u4FE1\u53F7</h3><p>\u4FE1\u53F7\u662F\u8FDB\u7A0B\u95F4\u901A\u4FE1\u673A\u5236\u4E2D\u552F\u4E00\u7684\u5F02\u6B65\u901A\u4FE1\u673A\u5236\uFF0C\u53EF\u4EE5\u770B\u4F5C\u662F\u5F02\u6B65\u901A\u77E5\uFF0C\u901A\u77E5\u63A5\u6536\u4FE1\u53F7\u7684\u8FDB\u7A0B\u6709\u54EA\u4E9B\u4E8B\u60C5\u53D1\u751F\u4E86\u3002</p><p>\u4E5F\u53EF\u4EE5\u7B80\u5355\u7406\u89E3\u4E3A\u4FE1\u53F7\u662F\u67D0\u79CD\u5F62\u5F0F\u4E0A\u7684\u8F6F\u4E2D\u65AD</p><p>\u53EF\u8FD0\u884C<code>kill -l</code>\u67E5\u770BLinux\u652F\u6301\u7684\u4FE1\u53F7\u5217\u8868\uFF1A</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>kill -l
  1) SIGHUP   2) SIGINT   3) SIGQUIT  4) SIGILL   5) SIGTRAP
  6) SIGABRT  7) SIGBUS   8) SIGFPE   9) SIGKILL 10) SIGUSR1
 11) SIGSEGV 12) SIGUSR2 13) SIGPIPE 14) SIGALRM 15) SIGTERM
diff --git a/dist/assets/os.html.2d6bc714.js b/dist/assets/os.html.781c26b2.js
similarity index 99%
rename from dist/assets/os.html.2d6bc714.js
rename to dist/assets/os.html.781c26b2.js
index 2eae1f29..dbec6564 100644
--- a/dist/assets/os.html.2d6bc714.js
+++ b/dist/assets/os.html.781c26b2.js
@@ -1 +1 @@
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diff --git a/dist/assets/oss.html.977b34d5.js b/dist/assets/oss.html.8b1ce1ec.js
similarity index 86%
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rename to dist/assets/oss.html.8b1ce1ec.js
index 8d3d2e22..9e78214a 100644
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+++ b/dist/assets/oss.html.8b1ce1ec.js
@@ -1 +1 @@
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diff --git a/dist/assets/oss.html.b690f015.js b/dist/assets/oss.html.e3216442.js
similarity index 98%
rename from dist/assets/oss.html.b690f015.js
rename to dist/assets/oss.html.e3216442.js
index 21a10ae8..a4faa105 100644
--- a/dist/assets/oss.html.b690f015.js
+++ b/dist/assets/oss.html.e3216442.js
@@ -1,4 +1,4 @@
-import{_ as p}from"./plugin-vue_export-helper.21dcd24c.js";import{r as e,o,c,a as n,b as t,e as i,d as s}from"./app.a0271b9c.js";const l={},u=i(`<h1 id="\u5D29\u6E83-\u6211\u5E26\u7684\u5B9E\u4E60\u751F\u7ADF\u7136\u628A\u56FE\u7247\u76F4\u63A5\u5B58\u5230\u4E86\u670D\u52A1\u5668\u4E0A" tabindex="-1"><a class="header-anchor" href="#\u5D29\u6E83-\u6211\u5E26\u7684\u5B9E\u4E60\u751F\u7ADF\u7136\u628A\u56FE\u7247\u76F4\u63A5\u5B58\u5230\u4E86\u670D\u52A1\u5668\u4E0A" aria-hidden="true">#</a> \u5D29\u6E83\uFF01\u6211\u5E26\u7684\u5B9E\u4E60\u751F\u7ADF\u7136\u628A\u56FE\u7247\u76F4\u63A5\u5B58\u5230\u4E86\u670D\u52A1\u5668\u4E0A\uFF01</h1><p>\u5C0F\u4E8C\u662F\u65B0\u6765\u7684\u5B9E\u4E60\u751F\uFF0C\u4F5C\u4E3A\u6280\u672F leader\uFF0C\u6211\u7ED9\u4ED6\u5B89\u6392\u4E86\u4E00\u4E2A\u975E\u5E38\u7B80\u5355\u7684\u7EC3\u624B\u4EFB\u52A1\uFF0C\u628A\u524D\u7AEF markdown \u7F16\u8F91\u5668\u91CC\u4E0A\u4F20\u7684\u56FE\u7247\u4FDD\u5B58\u5230\u670D\u52A1\u5668\u7AEF\uFF0C\u7ED3\u679C\u4ED6\u771F\u7684\u5C31\u628A\u56FE\u7247\u76F4\u63A5\u4FDD\u5B58\u5230\u4E86\u670D\u52A1\u5668\u4E0A\uFF0C\u8FD9\u4E0B\u53EF\u628A\u6211\u6C14\u574F\u4E86\uFF0C\u5C31\u4E0D\u80FD\u641E\u4E2A\u5BF9\u8C61\u5B58\u50A8\u670D\u52A1\uFF0C\u6BD4\u5982\u8BF4 OSS\u3001MinIO\uFF1F</p><p>\u4ED6\u7406\u76F4\u6C14\u58EE\u5730\u53CD\u9A73\u9053\uFF1A\u201C\u8C01\u8BA9\u4F60\u4E0D\u8BB2\u6E05\u695A\uFF0C\u6211\u53BB\u627E\u8001\u677F\u628A\u4F60\u5F00\u6389\uFF01\u201D\u6211\u77AC\u95F4\u5C31\u6002\u4E86\uFF0C\u8BF4\uFF0C\u201C\u6765\u6765\u6765\uFF0C\u6211\u624B\u628A\u624B\u6559\u4F60\u600E\u4E48\u628A\u56FE\u7247\u4FDD\u5B58\u5230 OSS \u4E0A\uFF0C\u597D\u4E0D\u597D\uFF1F\u201D</p><p>\u201C\u4E0D\u7528\u4E86\uFF0C\u8FD8\u662F\u6211\u6765\u6559\u4F60\u5427\u3002\u201D\u5C0F\u4E8C\u975E\u5E38\u81EA\u4FE1\uFF0C\u4E0B\u9762\u662F\u4ED6\u5728 Spring Boot \u5E94\u7528\u4E2D\u6574\u5408 OSS \u505A\u7684\u8BB0\u5F55\u3002</p><p>\u7279\u6B64\u58F0\u660E\uFF1A\u963F\u91CC\u4E91 OSS \u7684\u4EA7\u54C1\u8D1F\u8D23\u4EBA\u770B\u5230\u540E\u8BF7\u81EA\u89C9\u8FC7\u6765\u7ED3\u7B97\u4E0B\u63A8\u5E7F\u8D39\u7528\uFF08\u72D7\u5934\uFF09\u3002\u771F\u5FC3\u8BB2\uFF1ASpring Boot+OSS \u5728\u5B9E\u9645\u5F00\u53D1\u4E2D\u633A\u5E38\u89C1\u7684\u3002</p><h3 id="\u4E00\u3001\u5F00\u901A-oss" tabindex="-1"><a class="header-anchor" href="#\u4E00\u3001\u5F00\u901A-oss" aria-hidden="true">#</a> \u4E00\u3001\u5F00\u901A OSS</h3><p>OSS \u4E5F\u5C31\u662F Object Storage Service\uFF0C\u662F\u963F\u91CC\u4E91\u63D0\u4F9B\u7684\u4E00\u5957\u5BF9\u8C61\u5B58\u50A8\u670D\u52A1\uFF0C\u56FD\u5185\u7684\u7ADE\u54C1\u8FD8\u6709\u4E03\u725B\u4E91\u7684 Kodo\u548C\u817E\u8BAF\u4E91\u7684COS\u3002</p><p>\u7B2C\u4E00\u6B65\uFF0C\u767B\u5F55\u963F\u91CC\u4E91\u5B98\u7F51\uFF0C\u641C\u7D22\u201COSS\u201D\u5173\u952E\u5B57\uFF0C\u8FDB\u5165 OSS \u4EA7\u54C1\u9875\u3002</p><p>\u7B2C\u4E8C\u6B65\uFF0C\u5982\u679C\u662F OSS \u65B0\u7528\u6237\u7684\u8BDD\uFF0C\u53EF\u4EE5\u4EAB\u53D7 6 \u4E2A\u6708\u7684\u65B0\u4EBA\u4E13\u4EAB\u4F18\u60E0\u4EF7\uFF0C\u4E0D\u8FC7\u7EED\u8D39\u7684\u65F6\u5019\u8FD8\u662F\u4F1A\u8089\u75BC\u3002</p><p>\u7B2C\u4E09\u6B65\uFF0C\u8FDB\u5165 OSS \u7BA1\u7406\u63A7\u5236\u53F0\uFF0C\u70B9\u51FB\u300CBucket \u5217\u8868\u300D\uFF0C\u70B9\u51FB\u300C\u521B\u5EFA Bucket\u300D\u3002</p><p><img src="https://img-blog.csdnimg.cn/img_convert/90545c542bb7576f37d3e7d214d65ea2.png" alt=""></p><p>Bucket \u7684\u8BCD\u9762\u610F\u601D\u662F\u6876\uFF0C\u8FD9\u91CC\u6307\u5B58\u50A8\u7A7A\u95F4\uFF0C\u5C31\u662F\u7528\u4E8E\u5B58\u50A8\u5BF9\u8C61\u7684\u5BB9\u5668\u3002\u6CE8\u610F\u8BFB\u5199\u6743\u9650\u4E3A\u201C\u516C\u5171\u8BFB\u201D\uFF0C\u4E5F\u5C31\u662F\u5141\u8BB8\u4E92\u8054\u7F51\u7528\u6237\u8BBF\u95EE\u4E91\u7A7A\u95F4\u4E0A\u7684\u56FE\u7247\u3002</p><p>\u7B2C\u56DB\u6B65\uFF0C\u70B9\u51FB\u300C\u786E\u5B9A\u300D\u5C31\u7B97\u662F\u5F00\u901A\u6210\u529F\u4E86\u3002</p><h3 id="\u4E8C\u3001\u6574\u5408-oss" tabindex="-1"><a class="header-anchor" href="#\u4E8C\u3001\u6574\u5408-oss" aria-hidden="true">#</a> \u4E8C\u3001\u6574\u5408 OSS</h3><p>\u7B2C\u4E00\u6B65\uFF0C\u5728 pom.xml \u6587\u4EF6\u4E2D\u6DFB\u52A0 OSS \u7684\u4F9D\u8D56\u3002</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;!-- \u963F\u91CC\u4E91 OSS --&gt;
+import{_ as p}from"./plugin-vue_export-helper.21dcd24c.js";import{r as e,o,c,a as n,b as t,e as i,d as s}from"./app.615e41d8.js";const l={},u=i(`<h1 id="\u5D29\u6E83-\u6211\u5E26\u7684\u5B9E\u4E60\u751F\u7ADF\u7136\u628A\u56FE\u7247\u76F4\u63A5\u5B58\u5230\u4E86\u670D\u52A1\u5668\u4E0A" tabindex="-1"><a class="header-anchor" href="#\u5D29\u6E83-\u6211\u5E26\u7684\u5B9E\u4E60\u751F\u7ADF\u7136\u628A\u56FE\u7247\u76F4\u63A5\u5B58\u5230\u4E86\u670D\u52A1\u5668\u4E0A" aria-hidden="true">#</a> \u5D29\u6E83\uFF01\u6211\u5E26\u7684\u5B9E\u4E60\u751F\u7ADF\u7136\u628A\u56FE\u7247\u76F4\u63A5\u5B58\u5230\u4E86\u670D\u52A1\u5668\u4E0A\uFF01</h1><p>\u5C0F\u4E8C\u662F\u65B0\u6765\u7684\u5B9E\u4E60\u751F\uFF0C\u4F5C\u4E3A\u6280\u672F leader\uFF0C\u6211\u7ED9\u4ED6\u5B89\u6392\u4E86\u4E00\u4E2A\u975E\u5E38\u7B80\u5355\u7684\u7EC3\u624B\u4EFB\u52A1\uFF0C\u628A\u524D\u7AEF markdown \u7F16\u8F91\u5668\u91CC\u4E0A\u4F20\u7684\u56FE\u7247\u4FDD\u5B58\u5230\u670D\u52A1\u5668\u7AEF\uFF0C\u7ED3\u679C\u4ED6\u771F\u7684\u5C31\u628A\u56FE\u7247\u76F4\u63A5\u4FDD\u5B58\u5230\u4E86\u670D\u52A1\u5668\u4E0A\uFF0C\u8FD9\u4E0B\u53EF\u628A\u6211\u6C14\u574F\u4E86\uFF0C\u5C31\u4E0D\u80FD\u641E\u4E2A\u5BF9\u8C61\u5B58\u50A8\u670D\u52A1\uFF0C\u6BD4\u5982\u8BF4 OSS\u3001MinIO\uFF1F</p><p>\u4ED6\u7406\u76F4\u6C14\u58EE\u5730\u53CD\u9A73\u9053\uFF1A\u201C\u8C01\u8BA9\u4F60\u4E0D\u8BB2\u6E05\u695A\uFF0C\u6211\u53BB\u627E\u8001\u677F\u628A\u4F60\u5F00\u6389\uFF01\u201D\u6211\u77AC\u95F4\u5C31\u6002\u4E86\uFF0C\u8BF4\uFF0C\u201C\u6765\u6765\u6765\uFF0C\u6211\u624B\u628A\u624B\u6559\u4F60\u600E\u4E48\u628A\u56FE\u7247\u4FDD\u5B58\u5230 OSS \u4E0A\uFF0C\u597D\u4E0D\u597D\uFF1F\u201D</p><p>\u201C\u4E0D\u7528\u4E86\uFF0C\u8FD8\u662F\u6211\u6765\u6559\u4F60\u5427\u3002\u201D\u5C0F\u4E8C\u975E\u5E38\u81EA\u4FE1\uFF0C\u4E0B\u9762\u662F\u4ED6\u5728 Spring Boot \u5E94\u7528\u4E2D\u6574\u5408 OSS \u505A\u7684\u8BB0\u5F55\u3002</p><p>\u7279\u6B64\u58F0\u660E\uFF1A\u963F\u91CC\u4E91 OSS \u7684\u4EA7\u54C1\u8D1F\u8D23\u4EBA\u770B\u5230\u540E\u8BF7\u81EA\u89C9\u8FC7\u6765\u7ED3\u7B97\u4E0B\u63A8\u5E7F\u8D39\u7528\uFF08\u72D7\u5934\uFF09\u3002\u771F\u5FC3\u8BB2\uFF1ASpring Boot+OSS \u5728\u5B9E\u9645\u5F00\u53D1\u4E2D\u633A\u5E38\u89C1\u7684\u3002</p><h3 id="\u4E00\u3001\u5F00\u901A-oss" tabindex="-1"><a class="header-anchor" href="#\u4E00\u3001\u5F00\u901A-oss" aria-hidden="true">#</a> \u4E00\u3001\u5F00\u901A OSS</h3><p>OSS \u4E5F\u5C31\u662F Object Storage Service\uFF0C\u662F\u963F\u91CC\u4E91\u63D0\u4F9B\u7684\u4E00\u5957\u5BF9\u8C61\u5B58\u50A8\u670D\u52A1\uFF0C\u56FD\u5185\u7684\u7ADE\u54C1\u8FD8\u6709\u4E03\u725B\u4E91\u7684 Kodo\u548C\u817E\u8BAF\u4E91\u7684COS\u3002</p><p>\u7B2C\u4E00\u6B65\uFF0C\u767B\u5F55\u963F\u91CC\u4E91\u5B98\u7F51\uFF0C\u641C\u7D22\u201COSS\u201D\u5173\u952E\u5B57\uFF0C\u8FDB\u5165 OSS \u4EA7\u54C1\u9875\u3002</p><p>\u7B2C\u4E8C\u6B65\uFF0C\u5982\u679C\u662F OSS \u65B0\u7528\u6237\u7684\u8BDD\uFF0C\u53EF\u4EE5\u4EAB\u53D7 6 \u4E2A\u6708\u7684\u65B0\u4EBA\u4E13\u4EAB\u4F18\u60E0\u4EF7\uFF0C\u4E0D\u8FC7\u7EED\u8D39\u7684\u65F6\u5019\u8FD8\u662F\u4F1A\u8089\u75BC\u3002</p><p>\u7B2C\u4E09\u6B65\uFF0C\u8FDB\u5165 OSS \u7BA1\u7406\u63A7\u5236\u53F0\uFF0C\u70B9\u51FB\u300CBucket \u5217\u8868\u300D\uFF0C\u70B9\u51FB\u300C\u521B\u5EFA Bucket\u300D\u3002</p><p><img src="https://img-blog.csdnimg.cn/img_convert/90545c542bb7576f37d3e7d214d65ea2.png" alt=""></p><p>Bucket \u7684\u8BCD\u9762\u610F\u601D\u662F\u6876\uFF0C\u8FD9\u91CC\u6307\u5B58\u50A8\u7A7A\u95F4\uFF0C\u5C31\u662F\u7528\u4E8E\u5B58\u50A8\u5BF9\u8C61\u7684\u5BB9\u5668\u3002\u6CE8\u610F\u8BFB\u5199\u6743\u9650\u4E3A\u201C\u516C\u5171\u8BFB\u201D\uFF0C\u4E5F\u5C31\u662F\u5141\u8BB8\u4E92\u8054\u7F51\u7528\u6237\u8BBF\u95EE\u4E91\u7A7A\u95F4\u4E0A\u7684\u56FE\u7247\u3002</p><p>\u7B2C\u56DB\u6B65\uFF0C\u70B9\u51FB\u300C\u786E\u5B9A\u300D\u5C31\u7B97\u662F\u5F00\u901A\u6210\u529F\u4E86\u3002</p><h3 id="\u4E8C\u3001\u6574\u5408-oss" tabindex="-1"><a class="header-anchor" href="#\u4E8C\u3001\u6574\u5408-oss" aria-hidden="true">#</a> \u4E8C\u3001\u6574\u5408 OSS</h3><p>\u7B2C\u4E00\u6B65\uFF0C\u5728 pom.xml \u6587\u4EF6\u4E2D\u6DFB\u52A0 OSS \u7684\u4F9D\u8D56\u3002</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;!-- \u963F\u91CC\u4E91 OSS --&gt;
 &lt;dependency&gt;
     &lt;groupId&gt;com.aliyun.oss&lt;/groupId&gt;
     &lt;artifactId&gt;aliyun-sdk-oss&lt;/artifactId&gt;
@@ -146,4 +146,4 @@ import{_ as p}from"./plugin-vue_export-helper.21dcd24c.js";import{r as e,o,c,a a
     <span class="token punctuation">}</span>
     <span class="token keyword">return</span> <span class="token function">formatOSSPath</span><span class="token punctuation">(</span>objectName<span class="token punctuation">)</span><span class="token punctuation">;</span>
 <span class="token punctuation">}</span>
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>\u7B2C\u4E09\u6B65\uFF0C\u901A\u8FC7 Web \u7BA1\u7406\u7AEF\u6765\u6D4B\u8BD5\u5916\u94FE\u662F\u5426\u8F6C\u94FE\u6210\u529F\u3002\u5148\u627E\u4E24\u5F20\u5916\u94FE\u7684\u56FE\u7247\uFF0C\u53EF\u4EE5\u770B\u5230 markdown \u5728\u9884\u89C8\u7684\u65F6\u5019\u5C31\u4E0D\u663E\u793A\u3002</p><p><img src="https://img-blog.csdnimg.cn/img_convert/5d7f479d69f7139d1ceb26ac27e2b19f.png" alt=""></p><p>\u7136\u540E\u6211\u4EEC\u70B9\u51FB\u53D1\u5E03\uFF0C\u53EF\u4EE5\u770B\u5230\u4E24\u5F20\u56FE\u7247\u90FD\u6B63\u5E38\u663E\u793A\u4E86\uFF0C\u56E0\u4E3A\u8F6C\u6210\u4E86 OSS \u7684\u56FE\u7247\u8BBF\u95EE\u5730\u5740\u3002</p><p><img src="https://img-blog.csdnimg.cn/img_convert/5acb7ffa8c9856b6c5471632ae2e9ecf.png" alt=""></p><h3 id="\u4E94\u3001\u5C0F\u7ED3" tabindex="-1"><a class="header-anchor" href="#\u4E94\u3001\u5C0F\u7ED3" aria-hidden="true">#</a> \u4E94\u3001\u5C0F\u7ED3</h3>`,43),k=s("\u7EFC\u4E0A\u6765\u770B\uFF0C\u5B9E\u4E60\u751F\u5C0F\u4E8C\u5728 Spring Boot \u4E2D\u6574\u5408 OSS \u7684\u4EE3\u7801\u8FD8\u662F\u633A\u9760\u8C31\u7684\u3002\u4E5F\u8BB8 OSS+CDN \u624D\u662F\u56FE\u5E8A\u7684\u6700\u597D\u89E3\u51B3\u65B9\u6848\uFF0C\u4E0D\u8FC7"),r={href:"https://mp.weixin.qq.com/s/VRmXn2_71yy3w-SvKTs1Fg",target:"_blank",rel:"noopener noreferrer"},d=s("\u963F\u91CC\u4E91\u7684 HTTPS CDN \u5728 GitHub \u4E0A\u65E0\u6CD5\u56DE\u6E90"),v=s("\u5BFC\u81F4\u56FE\u7247\u4E0D\u663E\u793A\u7684\u95EE\u9898\u4ECD\u7136\u6CA1\u6709\u5F97\u5230\u6709\u6548\u7684\u89E3\u51B3\u3002"),m=n("p",null,"\u9700\u8981\u6E90\u7801\u7684\u5C0F\u4F19\u4F34\u53EF\u4EE5\u76F4\u63A5\u5230\u7F16\u7A0B\u55B5\u{1F431}\u6E90\u7801\u8DEF\u5F84\u62C9\u53D6\uFF1A",-1),b={href:"https://github.com/itwanger/coding-more",target:"_blank",rel:"noopener noreferrer"},g=s("https://github.com/itwanger/coding-more"),S=n("hr",null,null,-1);function f(h,y){const a=e("ExternalLinkIcon");return o(),c("div",null,[u,n("p",null,[k,n("a",r,[d,t(a)]),v]),m,n("blockquote",null,[n("p",null,[n("a",b,[g,t(a)])])]),S])}var x=p(l,[["render",f],["__file","oss.html.vue"]]);export{x as default};
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>\u7B2C\u4E09\u6B65\uFF0C\u901A\u8FC7 Web \u7BA1\u7406\u7AEF\u6765\u6D4B\u8BD5\u5916\u94FE\u662F\u5426\u8F6C\u94FE\u6210\u529F\u3002\u5148\u627E\u4E24\u5F20\u5916\u94FE\u7684\u56FE\u7247\uFF0C\u53EF\u4EE5\u770B\u5230 markdown \u5728\u9884\u89C8\u7684\u65F6\u5019\u5C31\u4E0D\u663E\u793A\u3002</p><p><img src="https://img-blog.csdnimg.cn/img_convert/5d7f479d69f7139d1ceb26ac27e2b19f.png" alt=""></p><p>\u7136\u540E\u6211\u4EEC\u70B9\u51FB\u53D1\u5E03\uFF0C\u53EF\u4EE5\u770B\u5230\u4E24\u5F20\u56FE\u7247\u90FD\u6B63\u5E38\u663E\u793A\u4E86\uFF0C\u56E0\u4E3A\u8F6C\u6210\u4E86 OSS \u7684\u56FE\u7247\u8BBF\u95EE\u5730\u5740\u3002</p><p><img src="https://img-blog.csdnimg.cn/img_convert/5acb7ffa8c9856b6c5471632ae2e9ecf.png" alt=""></p><h3 id="\u4E94\u3001\u5C0F\u7ED3" tabindex="-1"><a class="header-anchor" href="#\u4E94\u3001\u5C0F\u7ED3" aria-hidden="true">#</a> \u4E94\u3001\u5C0F\u7ED3</h3>`,43),k=s("\u7EFC\u4E0A\u6765\u770B\uFF0C\u5B9E\u4E60\u751F\u5C0F\u4E8C\u5728 Spring Boot \u4E2D\u6574\u5408 OSS \u7684\u4EE3\u7801\u8FD8\u662F\u633A\u9760\u8C31\u7684\u3002\u4E5F\u8BB8 OSS+CDN \u624D\u662F\u56FE\u5E8A\u7684\u6700\u597D\u89E3\u51B3\u65B9\u6848\uFF0C\u4E0D\u8FC7"),r={href:"https://mp.weixin.qq.com/s/VRmXn2_71yy3w-SvKTs1Fg",target:"_blank",rel:"noopener noreferrer"},d=s("\u963F\u91CC\u4E91\u7684 HTTPS CDN \u5728 GitHub \u4E0A\u65E0\u6CD5\u56DE\u6E90"),v=s("\u5BFC\u81F4\u56FE\u7247\u4E0D\u663E\u793A\u7684\u95EE\u9898\u4ECD\u7136\u6CA1\u6709\u5F97\u5230\u6709\u6548\u7684\u89E3\u51B3\u3002"),m=n("p",null,"\u9700\u8981\u6E90\u7801\u7684\u5C0F\u4F19\u4F34\u53EF\u4EE5\u76F4\u63A5\u5230\u7F16\u7A0B\u55B5\u{1F431}\u6E90\u7801\u8DEF\u5F84\u62C9\u53D6\uFF1A",-1),b={href:"https://github.com/itwanger/coding-more",target:"_blank",rel:"noopener noreferrer"},g=s("https://github.com/itwanger/coding-more"),S=n("hr",null,null,-1),f=n("p",null,[n("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png",alt:""})],-1);function h(y,w){const a=e("ExternalLinkIcon");return o(),c("div",null,[u,n("p",null,[k,n("a",r,[d,t(a)]),v]),m,n("blockquote",null,[n("p",null,[n("a",b,[g,t(a)])])]),S,f])}var q=p(l,[["render",h],["__file","oss.html.vue"]]);export{q as default};
diff --git a/dist/assets/others.html.214194b1.js b/dist/assets/others.html.63b5af1f.js
similarity index 96%
rename from dist/assets/others.html.214194b1.js
rename to dist/assets/others.html.63b5af1f.js
index e6ac15d7..e5bce031 100644
--- a/dist/assets/others.html.214194b1.js
+++ b/dist/assets/others.html.63b5af1f.js
@@ -1 +1 @@
-import{_ as r}from"./plugin-vue_export-helper.21dcd24c.js";import{r as s,o as a,c as l,a as e,b as n,d as o}from"./app.a0271b9c.js";const _={},c=e("h1",{id:"\u5176\u4ED6\u8F85\u52A9\u5DE5\u5177-\u8F6E\u5B50",tabindex:"-1"},[e("a",{class:"header-anchor",href:"#\u5176\u4ED6\u8F85\u52A9\u5DE5\u5177-\u8F6E\u5B50","aria-hidden":"true"},"#"),o(" \u5176\u4ED6\u8F85\u52A9\u5DE5\u5177/\u8F6E\u5B50")],-1),i={href:"https://mp.weixin.qq.com/s/ZgkNQsve_vq6Xq0_gnWHCw",target:"_blank",rel:"noopener noreferrer"},h=o("ApiPost\uFF1A\u4E00\u6B3E\u66F4\u9002\u5408\u56FD\u4EBA\u7684\u63A5\u53E3\u7BA1\u7406\u5DE5\u5177"),d={href:"https://mp.weixin.qq.com/s/gy6dVHvNy495bqov6JOAdA",target:"_blank",rel:"noopener noreferrer"},p=o("Multipass\uFF1A\u4E00\u6B3E\u66F4\u8F7B\u91CF\u7EA7\u7684\u865A\u62DF\u673A"),f={href:"https://mp.weixin.qq.com/s/EaGCe4GRG2C-0zuVxWxl5A",target:"_blank",rel:"noopener noreferrer"},m=o("drwa.io\uFF1A\u4E00\u4E2A\u5728\u7EBF\u7684\u753B\u56FE\u795E\u5668"),u={href:"https://mp.weixin.qq.com/s/H2Bwc-7ghcjyaEnKUTQ5Dg",target:"_blank",rel:"noopener noreferrer"},x=o("EasyPoi\uFF1A5\u884C\u4EE3\u7801\u5C31\u53EF\u4EE5\u5B8C\u6210Excel\u7684\u5BFC\u5165\u5BFC\u51FA\u7684\u5F00\u6E90\u9879\u76EE"),g={href:"https://mp.weixin.qq.com/s/Knb7b-uYLWsKZfgvGgN_ug",target:"_blank",rel:"noopener noreferrer"},q=o("EasyExcel\uFF1A\u4E00\u4E2A\u57FA\u4E8EJava\u7684\u7B80\u5355\u3001\u7701\u5185\u5B58\u7684\u8BFB\u5199Excel\u7684\u5F00\u6E90\u9879\u76EE");function b(k,v){const t=s("ExternalLinkIcon");return a(),l("div",null,[c,e("ul",null,[e("li",null,[e("a",i,[h,n(t)])]),e("li",null,[e("a",d,[p,n(t)])]),e("li",null,[e("a",f,[m,n(t)])]),e("li",null,[e("a",u,[x,n(t)])]),e("li",null,[e("a",g,[q,n(t)])])])])}var N=r(_,[["render",b],["__file","others.html.vue"]]);export{N as default};
+import{_ as r}from"./plugin-vue_export-helper.21dcd24c.js";import{r as s,o as a,c as l,a as e,b as n,d as o}from"./app.615e41d8.js";const _={},c=e("h1",{id:"\u5176\u4ED6\u8F85\u52A9\u5DE5\u5177-\u8F6E\u5B50",tabindex:"-1"},[e("a",{class:"header-anchor",href:"#\u5176\u4ED6\u8F85\u52A9\u5DE5\u5177-\u8F6E\u5B50","aria-hidden":"true"},"#"),o(" \u5176\u4ED6\u8F85\u52A9\u5DE5\u5177/\u8F6E\u5B50")],-1),i={href:"https://mp.weixin.qq.com/s/ZgkNQsve_vq6Xq0_gnWHCw",target:"_blank",rel:"noopener noreferrer"},h=o("ApiPost\uFF1A\u4E00\u6B3E\u66F4\u9002\u5408\u56FD\u4EBA\u7684\u63A5\u53E3\u7BA1\u7406\u5DE5\u5177"),d={href:"https://mp.weixin.qq.com/s/gy6dVHvNy495bqov6JOAdA",target:"_blank",rel:"noopener noreferrer"},p=o("Multipass\uFF1A\u4E00\u6B3E\u66F4\u8F7B\u91CF\u7EA7\u7684\u865A\u62DF\u673A"),f={href:"https://mp.weixin.qq.com/s/EaGCe4GRG2C-0zuVxWxl5A",target:"_blank",rel:"noopener noreferrer"},m=o("drwa.io\uFF1A\u4E00\u4E2A\u5728\u7EBF\u7684\u753B\u56FE\u795E\u5668"),u={href:"https://mp.weixin.qq.com/s/H2Bwc-7ghcjyaEnKUTQ5Dg",target:"_blank",rel:"noopener noreferrer"},x=o("EasyPoi\uFF1A5\u884C\u4EE3\u7801\u5C31\u53EF\u4EE5\u5B8C\u6210Excel\u7684\u5BFC\u5165\u5BFC\u51FA\u7684\u5F00\u6E90\u9879\u76EE"),g={href:"https://mp.weixin.qq.com/s/Knb7b-uYLWsKZfgvGgN_ug",target:"_blank",rel:"noopener noreferrer"},q=o("EasyExcel\uFF1A\u4E00\u4E2A\u57FA\u4E8EJava\u7684\u7B80\u5355\u3001\u7701\u5185\u5B58\u7684\u8BFB\u5199Excel\u7684\u5F00\u6E90\u9879\u76EE");function b(k,v){const t=s("ExternalLinkIcon");return a(),l("div",null,[c,e("ul",null,[e("li",null,[e("a",i,[h,n(t)])]),e("li",null,[e("a",d,[p,n(t)])]),e("li",null,[e("a",f,[m,n(t)])]),e("li",null,[e("a",u,[x,n(t)])]),e("li",null,[e("a",g,[q,n(t)])])])])}var N=r(_,[["render",b],["__file","others.html.vue"]]);export{N as default};
diff --git a/dist/assets/override-overload.html.853755f9.js b/dist/assets/override-overload.html.1c9aaf26.js
similarity index 99%
rename from dist/assets/override-overload.html.853755f9.js
rename to dist/assets/override-overload.html.1c9aaf26.js
index 0235da58..11f55c60 100644
--- a/dist/assets/override-overload.html.853755f9.js
+++ b/dist/assets/override-overload.html.1c9aaf26.js
@@ -1,4 +1,4 @@
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\u201D\u6211\u9762\u5E26\u7740\u6734\u5B9E\u65E0\u534E\u7684\u5FAE\u7B11\u7EE7\u7EED\u8BF4\uFF0C\u201C\u5982\u679C\u65B9\u6CD5\u7684\u529F\u80FD\u662F\u4E00\u6837\u7684\uFF0C\u4F46\u53C2\u6570\u4E0D\u540C\uFF0C\u4F7F\u7528\u76F8\u540C\u7684\u540D\u5B57\u53EF\u4EE5\u63D0\u9AD8\u7A0B\u5E8F\u7684\u53EF\u8BFB\u6027\u3002\u201D</p><p>\u201C\u5982\u679C\u5B50\u7C7B\u5177\u6709\u548C\u7236\u7C7B\u4E00\u6837\u7684\u65B9\u6CD5\uFF08\u53C2\u6570\u76F8\u540C\u3001\u8FD4\u56DE\u7C7B\u578B\u76F8\u540C\u3001\u65B9\u6CD5\u540D\u76F8\u540C\uFF0C\u4F46\u65B9\u6CD5\u4F53\u53EF\u80FD\u4E0D\u540C\uFF09\uFF0C\u6211\u4EEC\u79F0\u4E4B\u4E3A\u65B9\u6CD5\u91CD\u5199\u3002 \u65B9\u6CD5\u91CD\u5199\u7528\u4E8E\u63D0\u4F9B\u7236\u7C7B\u5DF2\u7ECF\u58F0\u660E\u7684\u65B9\u6CD5\u7684\u7279\u6B8A\u5B9E\u73B0\uFF0C\u662F\u5B9E\u73B0\u591A\u6001\u7684\u57FA\u7840\u6761\u4EF6\u3002\u201D</p><p>\u201C\u53EA\u4E0D\u8FC7\uFF0C\u65B9\u6CD5\u91CD\u8F7D\u4E0E\u65B9\u6CD5\u91CD\u5199\u5728\u540D\u5B57\u4E0A\u5F88\u76F8\u4F3C\uFF0C\u5C31\u50CF\u662F\u5144\u5F1F\u4FE9\uFF0C\u5BFC\u81F4\u521D\u5B66\u8005\u7ECF\u5E38\u628A\u5B83\u4EEC\u4FE9\u641E\u6DF7\u3002\u201D</p><p>\u201C\u65B9\u6CD5\u91CD\u8F7D\u7684\u82F1\u6587\u540D\u53EB Overloading\uFF0C\u65B9\u6CD5\u91CD\u5199\u7684\u82F1\u6587\u540D\u53EB Overriding\uFF0C\u56E0\u6B64\uFF0C\u4E0D\u4EC5\u4E2D\u6587\u540D\u5F88\u76F8\u8FD1\uFF0C\u82F1\u6587\u540D\u4E4B\u95F4\u4E5F\u5F88\u76F8\u8FD1\uFF0C\u8FD9\u5C31\u66F4\u5BB9\u6613\u8BA9\u521D\u5B66\u8005\u641E\u6DF7\u4E86\u3002\u201D</p><p>\u201C\u4F46\u4E24\u8005\u5176\u5B9E\u662F\u5B8C\u5168\u4E0D\u540C\u7684\uFF01\u901A\u8FC7\u4E0B\u9762\u8FD9\u5F20\u56FE\uFF0C\u4F60\u5C31\u80FD\u770B\u5F97\u4E00\u6E05\u4E8C\u695A\u3002\u201D</p><p>\u8BDD\u97F3\u521A\u843D\uFF0C\u6211\u5C31\u5728 IDEA \u4E2D\u567C\u91CC\u556A\u5566\u5730\u6572\u4E86\u8D77\u6765\u3002\u4E24\u6BB5\u4EE3\u7801\uFF0C\u5206\u522B\u662F\u65B9\u6CD5\u91CD\u5199\u548C\u65B9\u6CD5\u91CD\u8F7D\u3002\u7136\u540E\uFF0C\u628A\u8FD9\u4E24\u6BB5\u4EE3\u7801\u622A\u56FE\u5230 draw.io\uFF08\u4E00\u4E2A\u5F88\u6F02\u4EAE\u7684\u5728\u7EBF\u753B\u56FE\u7F51\u7AD9\uFF09\u4E0A\uFF0C\u52A0\u4E86\u4E00\u4E9B\u6587\u5B57\u8BF4\u660E\u3002\u6700\u540E\uFF0C\u6253\u5F00 Photoscape X\uFF0C\u628A\u4E24\u5F20\u56FE\u7247\u5408\u5E76\u5230\u4E86\u4E00\u8D77\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/core-points/21-01.png" alt=""></p><h3 id="_02\u3001\u65B9\u6CD5\u91CD\u8F7D" tabindex="-1"><a class="header-anchor" href="#_02\u3001\u65B9\u6CD5\u91CD\u8F7D" aria-hidden="true">#</a> 02\u3001\u65B9\u6CD5\u91CD\u8F7D</h3><p>\u201C\u4E09\u59B9\uFF0C\u4F60\u4ED4\u7EC6\u542C\u54E6\u3002\u201D\u6211\u7F13\u4E86\u4E00\u53E3\u6C14\u540E\u7EE7\u7EED\u8BF4\u9053\u3002</p><p>\u201C\u5728 Java \u4E2D\uFF0C\u6709\u4E24\u79CD\u65B9\u5F0F\u53EF\u4EE5\u8FBE\u5230\u65B9\u6CD5\u91CD\u8F7D\u7684\u76EE\u7684\u3002\u201D</p><p>\u201C\u7B2C\u4E00\uFF0C\u6539\u53D8\u53C2\u6570\u7684\u6570\u76EE\u3002\u6765\u770B\u4E0B\u9762\u8FD9\u6BB5\u4EE3\u7801\u3002\u201D</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">OverloadingByParamNum</span> <span class="token punctuation">{</span>
+import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e as p}from"./app.615e41d8.js";const t={},e=p(`<h1 id="java\u91CD\u5199-override-\u4E0E\u91CD\u8F7D-overload" tabindex="-1"><a class="header-anchor" href="#java\u91CD\u5199-override-\u4E0E\u91CD\u8F7D-overload" aria-hidden="true">#</a> Java\u91CD\u5199(Override)\u4E0E\u91CD\u8F7D(Overload)</h1><h3 id="_01\u3001\u5F00\u7BC7" tabindex="-1"><a class="header-anchor" href="#_01\u3001\u5F00\u7BC7" aria-hidden="true">#</a> 01\u3001\u5F00\u7BC7</h3><p>\u5165\u51AC\u7684\u591C\uFF0C\u603B\u662F\u6765\u5F97\u7279\u522B\u7684\u65E9\u3002\u6211\u9759\u9759\u5730\u7AD9\u5728\u9633\u53F0\uFF0C\u76EE\u5149\u6240\u53CA\u4E4B\u5904\uFF0C\u4E0D\u8FC7\u662F\u82E5\u9690\u82E5\u73B0\u7684\u94A2\u7B4B\u6DF7\u51DD\u571F\uFF0C\u8FD8\u6709\u90A3\u6BEB\u65E0\u60C5\u8C03\u7684\u706F\u5149\u3002</p><p>\u201C\u54E5\uFF0C\u522B\u7AD9\u5728\u90A3\u53D1\u5446\u4E86\u3002\u4ECA\u5929\u5B66\u5565\u554A\uFF0C\u4E03\u70B9\u534A\u6211\u5C31\u8981\u56DE\u5B66\u6821\u4E86\uFF0C\u7559\u7ED9\u4F60\u7684\u65F6\u95F4\u4E0D\u591A\u4E86\uFF0C\u4F60\u8981\u6293\u7D27\u54E6\u3002\u201D\u4E09\u59B9\u50B2\u5A07\u7684\u58F0\u97F3\u4E00\u4E0B\u5B50\u628A\u6211\u4ECE\u6E38\u79BB\u7684\u72B6\u6001\u62C9\u56DE\u5230\u4E86\u73B0\u5B9E\u3002</p><p>\u201C\u4ECA\u5929\u8981\u5B66\u4E60 Java \u4E2D\u7684\u65B9\u6CD5\u91CD\u8F7D\u4E0E\u65B9\u6CD5\u91CD\u5199\u3002\u201D\u6211\u8FC5\u901F\u5730\u8D70\u5230\u7535\u8111\u524D\u9762\uFF0C\u6253\u5F00\u4E00\u4EFD Excel \u6587\u6863\uFF0C\u770B\u4E86\u4E00\u4E0B\u300A\u6559\u59B9\u5B66 Java\u300B\u7684\u8FDB\u5EA6\uFF0C\u7136\u540E\u5BF9\u4E09\u59B9\u8BF4\u3002</p><p>\u201C\u5982\u679C\u4E00\u4E2A\u7C7B\u6709\u591A\u4E2A\u540D\u5B57\u76F8\u540C\u4F46\u53C2\u6570\u4E2A\u6570\u4E0D\u540C\u7684\u65B9\u6CD5\uFF0C\u6211\u4EEC\u901A\u5E38\u79F0\u8FD9\u4E9B\u65B9\u6CD5\u4E3A\u65B9\u6CD5\u91CD\u8F7D\u3002 \u201D\u6211\u9762\u5E26\u7740\u6734\u5B9E\u65E0\u534E\u7684\u5FAE\u7B11\u7EE7\u7EED\u8BF4\uFF0C\u201C\u5982\u679C\u65B9\u6CD5\u7684\u529F\u80FD\u662F\u4E00\u6837\u7684\uFF0C\u4F46\u53C2\u6570\u4E0D\u540C\uFF0C\u4F7F\u7528\u76F8\u540C\u7684\u540D\u5B57\u53EF\u4EE5\u63D0\u9AD8\u7A0B\u5E8F\u7684\u53EF\u8BFB\u6027\u3002\u201D</p><p>\u201C\u5982\u679C\u5B50\u7C7B\u5177\u6709\u548C\u7236\u7C7B\u4E00\u6837\u7684\u65B9\u6CD5\uFF08\u53C2\u6570\u76F8\u540C\u3001\u8FD4\u56DE\u7C7B\u578B\u76F8\u540C\u3001\u65B9\u6CD5\u540D\u76F8\u540C\uFF0C\u4F46\u65B9\u6CD5\u4F53\u53EF\u80FD\u4E0D\u540C\uFF09\uFF0C\u6211\u4EEC\u79F0\u4E4B\u4E3A\u65B9\u6CD5\u91CD\u5199\u3002 \u65B9\u6CD5\u91CD\u5199\u7528\u4E8E\u63D0\u4F9B\u7236\u7C7B\u5DF2\u7ECF\u58F0\u660E\u7684\u65B9\u6CD5\u7684\u7279\u6B8A\u5B9E\u73B0\uFF0C\u662F\u5B9E\u73B0\u591A\u6001\u7684\u57FA\u7840\u6761\u4EF6\u3002\u201D</p><p>\u201C\u53EA\u4E0D\u8FC7\uFF0C\u65B9\u6CD5\u91CD\u8F7D\u4E0E\u65B9\u6CD5\u91CD\u5199\u5728\u540D\u5B57\u4E0A\u5F88\u76F8\u4F3C\uFF0C\u5C31\u50CF\u662F\u5144\u5F1F\u4FE9\uFF0C\u5BFC\u81F4\u521D\u5B66\u8005\u7ECF\u5E38\u628A\u5B83\u4EEC\u4FE9\u641E\u6DF7\u3002\u201D</p><p>\u201C\u65B9\u6CD5\u91CD\u8F7D\u7684\u82F1\u6587\u540D\u53EB Overloading\uFF0C\u65B9\u6CD5\u91CD\u5199\u7684\u82F1\u6587\u540D\u53EB Overriding\uFF0C\u56E0\u6B64\uFF0C\u4E0D\u4EC5\u4E2D\u6587\u540D\u5F88\u76F8\u8FD1\uFF0C\u82F1\u6587\u540D\u4E4B\u95F4\u4E5F\u5F88\u76F8\u8FD1\uFF0C\u8FD9\u5C31\u66F4\u5BB9\u6613\u8BA9\u521D\u5B66\u8005\u641E\u6DF7\u4E86\u3002\u201D</p><p>\u201C\u4F46\u4E24\u8005\u5176\u5B9E\u662F\u5B8C\u5168\u4E0D\u540C\u7684\uFF01\u901A\u8FC7\u4E0B\u9762\u8FD9\u5F20\u56FE\uFF0C\u4F60\u5C31\u80FD\u770B\u5F97\u4E00\u6E05\u4E8C\u695A\u3002\u201D</p><p>\u8BDD\u97F3\u521A\u843D\uFF0C\u6211\u5C31\u5728 IDEA \u4E2D\u567C\u91CC\u556A\u5566\u5730\u6572\u4E86\u8D77\u6765\u3002\u4E24\u6BB5\u4EE3\u7801\uFF0C\u5206\u522B\u662F\u65B9\u6CD5\u91CD\u5199\u548C\u65B9\u6CD5\u91CD\u8F7D\u3002\u7136\u540E\uFF0C\u628A\u8FD9\u4E24\u6BB5\u4EE3\u7801\u622A\u56FE\u5230 draw.io\uFF08\u4E00\u4E2A\u5F88\u6F02\u4EAE\u7684\u5728\u7EBF\u753B\u56FE\u7F51\u7AD9\uFF09\u4E0A\uFF0C\u52A0\u4E86\u4E00\u4E9B\u6587\u5B57\u8BF4\u660E\u3002\u6700\u540E\uFF0C\u6253\u5F00 Photoscape X\uFF0C\u628A\u4E24\u5F20\u56FE\u7247\u5408\u5E76\u5230\u4E86\u4E00\u8D77\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/core-points/21-01.png" alt=""></p><h3 id="_02\u3001\u65B9\u6CD5\u91CD\u8F7D" tabindex="-1"><a class="header-anchor" href="#_02\u3001\u65B9\u6CD5\u91CD\u8F7D" aria-hidden="true">#</a> 02\u3001\u65B9\u6CD5\u91CD\u8F7D</h3><p>\u201C\u4E09\u59B9\uFF0C\u4F60\u4ED4\u7EC6\u542C\u54E6\u3002\u201D\u6211\u7F13\u4E86\u4E00\u53E3\u6C14\u540E\u7EE7\u7EED\u8BF4\u9053\u3002</p><p>\u201C\u5728 Java \u4E2D\uFF0C\u6709\u4E24\u79CD\u65B9\u5F0F\u53EF\u4EE5\u8FBE\u5230\u65B9\u6CD5\u91CD\u8F7D\u7684\u76EE\u7684\u3002\u201D</p><p>\u201C\u7B2C\u4E00\uFF0C\u6539\u53D8\u53C2\u6570\u7684\u6570\u76EE\u3002\u6765\u770B\u4E0B\u9762\u8FD9\u6BB5\u4EE3\u7801\u3002\u201D</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">OverloadingByParamNum</span> <span class="token punctuation">{</span>
     <span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">void</span> <span class="token function">main</span><span class="token punctuation">(</span><span class="token class-name">String</span><span class="token punctuation">[</span><span class="token punctuation">]</span> args<span class="token punctuation">)</span> <span class="token punctuation">{</span>
         <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token class-name">Adder</span><span class="token punctuation">.</span><span class="token function">add</span><span class="token punctuation">(</span><span class="token number">10</span><span class="token punctuation">,</span> <span class="token number">19</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
         <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token class-name">Adder</span><span class="token punctuation">.</span><span class="token function">add</span><span class="token punctuation">(</span><span class="token number">10</span><span class="token punctuation">,</span> <span class="token number">19</span><span class="token punctuation">,</span> <span class="token number">20</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
diff --git a/dist/assets/pass-by-value.html.c65b64be.js b/dist/assets/pass-by-value.html.cf8023d5.js
similarity index 99%
rename from dist/assets/pass-by-value.html.c65b64be.js
rename to dist/assets/pass-by-value.html.cf8023d5.js
index e33cbdd7..6d1c05d1 100644
--- a/dist/assets/pass-by-value.html.c65b64be.js
+++ b/dist/assets/pass-by-value.html.cf8023d5.js
@@ -1,4 +1,4 @@
-import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as a,c as s,e}from"./app.a0271b9c.js";const p={},t=e(`<h1 id="java\u5230\u5E95\u662F\u503C\u4F20\u9012\u8FD8\u662F\u5F15\u7528\u4F20\u9012" tabindex="-1"><a class="header-anchor" href="#java\u5230\u5E95\u662F\u503C\u4F20\u9012\u8FD8\u662F\u5F15\u7528\u4F20\u9012" aria-hidden="true">#</a> Java\u5230\u5E95\u662F\u503C\u4F20\u9012\u8FD8\u662F\u5F15\u7528\u4F20\u9012\uFF1F</h1><p>\u201C\u54E5\uFF0C\u8BF4\u8BF4 Java \u5230\u5E95\u662F\u503C\u4F20\u9012\u8FD8\u662F\u5F15\u7528\u4F20\u9012\u5427\uFF1F\u201D\u4E09\u59B9\u4E00\u8138\u7684\u56F0\u60D1\uFF0C\u770B\u5F97\u51FA\u6765\u5979\u88AB\u8FD9\u4E2A\u95EE\u9898\u6298\u78E8\u5F97\u4E0D\u8F7B\u3002</p><p>\u201C\u8BF4\u5B9E\u5728\u7684\uFF0C\u6211\u5728\u4E00\u5F00\u59CB\u5B66 Java \u7684\u65F6\u5019\u4E5F\u88AB\u8FD9\u4E2A\u95EE\u9898\u6298\u78E8\u5F97\u591F\u545B\uFF0C\u603B\u4EE5\u4E3A\u57FA\u672C\u6570\u636E\u7C7B\u578B\u5728\u4F20\u53C2\u7684\u65F6\u5019\u662F\u503C\u4F20\u9012\uFF0C\u800C\u5F15\u7528\u7C7B\u578B\u662F\u5F15\u7528\u4F20\u9012\u3002\u201D\u6211\u5BF9\u4E09\u59B9\u8892\u9732\u4E86\u5FC3\u58F0\uFF0C\u4E3A\u7684\u5C31\u662F\u8BA9\u5979\u4E0D\u518D\u90A3\u4E48\u7126\u8651\uFF0C\u5979\u54E5\u5F53\u5E74\u4E5F\u662F\u8FD9\u4E48\u8FC7\u6765\u7684\u3002</p><p>C \u8BED\u8A00\u662F\u5F88\u591A\u7F16\u7A0B\u8BED\u8A00\u7684\u6BCD\u80CE\uFF0C\u5305\u62EC Java\uFF0C\u90A3\u4E48\u5BF9\u4E8E C \u8BED\u8A00\u6765\u8BF4\uFF0C\u6240\u6709\u7684\u65B9\u6CD5\u53C2\u6570\u90FD\u662F\u201C\u901A\u8FC7\u503C\u201D\u4F20\u9012\u7684\uFF0C\u4E5F\u5C31\u662F\u8BF4\uFF0C\u4F20\u9012\u7ED9\u88AB\u8C03\u7528\u65B9\u6CD5\u7684\u53C2\u6570\u503C\u5B58\u653E\u5728\u4E34\u65F6\u53D8\u91CF\u4E2D\uFF0C\u800C\u4E0D\u662F\u5B58\u653E\u5728\u539F\u6765\u7684\u53D8\u91CF\u4E2D\u3002\u8FD9\u5C31\u610F\u5473\u7740\uFF0C\u88AB\u8C03\u7528\u7684\u65B9\u6CD5\u4E0D\u80FD\u4FEE\u6539\u8C03\u7528\u65B9\u6CD5\u4E2D\u53D8\u91CF\u7684\u503C\uFF0C\u800C\u53EA\u80FD\u4FEE\u6539\u5176\u79C1\u6709\u53D8\u91CF\u7684\u4E34\u65F6\u526F\u672C\u7684\u503C\u3002</p><p>Java \u7EE7\u627F\u4E86 C \u8BED\u8A00\u8FD9\u4E00\u7279\u6027\uFF0C\u56E0\u6B64 Java \u662F\u6309\u7167\u503C\u6765\u4F20\u9012\u7684\u3002</p><p>\u63A5\u4E0B\u6765\uFF0C\u6211\u4EEC\u5FC5\u987B\u5F97\u641E\u6E05\u695A\uFF0C\u5230\u5E95\u4EC0\u4E48\u662F\u503C\u4F20\u9012\uFF08pass by value\uFF09\uFF0C\u4EC0\u4E48\u662F\u5F15\u7528\u4F20\u9012\uFF08pass by reference\uFF09\uFF0C\u5426\u5219\uFF0C\u8BA8\u8BBA Java \u5230\u5E95\u662F\u503C\u4F20\u9012\u8FD8\u662F\u5F15\u7528\u4F20\u9012\u5C31\u663E\u5F97\u6BEB\u65E0\u610F\u4E49\u3002</p><p>\u5F53\u4E00\u4E2A\u53C2\u6570\u6309\u7167\u503C\u7684\u65B9\u5F0F\u5728\u4E24\u4E2A\u65B9\u6CD5\u4E4B\u95F4\u4F20\u9012\u65F6\uFF0C\u8C03\u7528\u8005\u548C\u88AB\u8C03\u7528\u8005\u5176\u5B9E\u662F\u7528\u7684\u4E24\u4E2A\u4E0D\u540C\u7684\u53D8\u91CF\u2014\u2014\u88AB\u8C03\u7528\u8005\u4E2D\u7684\u53D8\u91CF\uFF08\u539F\u59CB\u503C\uFF09\u662F\u8C03\u7528\u8005\u4E2D\u53D8\u91CF\u7684\u4E00\u4EFD\u62F7\u8D1D\uFF0C\u5BF9\u5B83\u4EEC\u5F53\u4E2D\u7684\u4EFB\u4F55\u4E00\u4E2A\u53D8\u91CF\u4FEE\u6539\u90FD\u4E0D\u4F1A\u5F71\u54CD\u5230\u53E6\u5916\u4E00\u4E2A\u53D8\u91CF\uFF0C\u636E\u8BF4 Fortran \u8BED\u8A00\u662F\u901A\u8FC7\u5F15\u7528\u4F20\u9012\u7684\u3002</p><p>\u201CFortran \u8BED\u8A00\uFF1F\u201D\u4E09\u59B9\u7741\u5927\u4E86\u53CC\u773C\uFF0C\u4F3C\u4E4E\u542C\u89C1\u4E86\u4EC0\u4E48\u65B0\u7684\u540D\u8BCD\u3002</p><p>\u201C\u662F\u7684\uFF0CFortran \u8BED\u8A00\uFF0C1957 \u5E74\u7531 IBM \u516C\u53F8\u5F00\u53D1\uFF0C\u662F\u4E16\u754C\u4E0A\u7B2C\u4E00\u4E2A\u88AB\u6B63\u5F0F\u91C7\u7528\u5E76\u6D41\u4F20\u81F3\u4ECA\u7684\u9AD8\u7EA7\u7F16\u7A0B\u8BED\u8A00\u3002\u201D</p><p>\u5F53\u4E00\u4E2A\u53C2\u6570\u6309\u7167\u5F15\u7528\u4F20\u9012\u7684\u65B9\u5F0F\u5728\u4E24\u4E2A\u65B9\u6CD5\u4E4B\u95F4\u4F20\u9012\u65F6\uFF0C\u8C03\u7528\u8005\u548C\u88AB\u8C03\u7528\u8005\u5176\u5B9E\u7528\u7684\u662F\u540C\u4E00\u4E2A\u53D8\u91CF\uFF0C\u5F53\u8BE5\u53D8\u91CF\u88AB\u4FEE\u6539\u65F6\uFF0C\u53CC\u65B9\u90FD\u662F\u53EF\u89C1\u7684\u3002</p><p>\u201C\u6211\u4EEC\u4E4B\u6240\u4EE5\u5BB9\u6613\u641E\u4E0D\u6E05\u695A Java \u5230\u5E95\u662F\u503C\u4F20\u9012\u8FD8\u662F\u5F15\u7528\u4F20\u9012\uFF0C\u4E3B\u8981\u662F\u56E0\u4E3A Java \u4E2D\u7684\u4E24\u7C7B\u6570\u636E\u7C7B\u578B\u7684\u53EB\u6CD5\u5BB9\u6613\u5F15\u53D1\u8BEF\u4F1A\uFF0C\u6BD4\u5982\u8BF4 int \u662F\u57FA\u672C\u7C7B\u578B\uFF0C\u8BF4\u5B83\u662F\u503C\u4F20\u9012\u7684\uFF0C\u6211\u4EEC\u5C31\u5F88\u5BB9\u6613\u7406\u89E3\uFF1B\u4F46\u5BF9\u4E8E\u5F15\u7528\u7C7B\u578B\uFF0C\u6BD4\u5982\u8BF4 String\uFF0C\u8BF4\u5B83\u4E5F\u662F\u503C\u4F20\u9012\u7684\u65F6\u5019\uFF0C\u6211\u4EEC\u5C31\u5BB9\u6613\u5F04\u4E0D\u660E\u767D\u3002\u201D</p><p>\u6211\u4EEC\u6765\u770B\u770B\u57FA\u672C\u6570\u636E\u7C7B\u578B\u548C\u5F15\u7528\u6570\u636E\u7C7B\u578B\u4E4B\u95F4\u7684\u5DEE\u522B\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">int</span> age <span class="token operator">=</span> <span class="token number">18</span><span class="token punctuation">;</span>
+import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as a,c as s,e}from"./app.615e41d8.js";const p={},t=e(`<h1 id="java\u5230\u5E95\u662F\u503C\u4F20\u9012\u8FD8\u662F\u5F15\u7528\u4F20\u9012" tabindex="-1"><a class="header-anchor" href="#java\u5230\u5E95\u662F\u503C\u4F20\u9012\u8FD8\u662F\u5F15\u7528\u4F20\u9012" aria-hidden="true">#</a> Java\u5230\u5E95\u662F\u503C\u4F20\u9012\u8FD8\u662F\u5F15\u7528\u4F20\u9012\uFF1F</h1><p>\u201C\u54E5\uFF0C\u8BF4\u8BF4 Java \u5230\u5E95\u662F\u503C\u4F20\u9012\u8FD8\u662F\u5F15\u7528\u4F20\u9012\u5427\uFF1F\u201D\u4E09\u59B9\u4E00\u8138\u7684\u56F0\u60D1\uFF0C\u770B\u5F97\u51FA\u6765\u5979\u88AB\u8FD9\u4E2A\u95EE\u9898\u6298\u78E8\u5F97\u4E0D\u8F7B\u3002</p><p>\u201C\u8BF4\u5B9E\u5728\u7684\uFF0C\u6211\u5728\u4E00\u5F00\u59CB\u5B66 Java \u7684\u65F6\u5019\u4E5F\u88AB\u8FD9\u4E2A\u95EE\u9898\u6298\u78E8\u5F97\u591F\u545B\uFF0C\u603B\u4EE5\u4E3A\u57FA\u672C\u6570\u636E\u7C7B\u578B\u5728\u4F20\u53C2\u7684\u65F6\u5019\u662F\u503C\u4F20\u9012\uFF0C\u800C\u5F15\u7528\u7C7B\u578B\u662F\u5F15\u7528\u4F20\u9012\u3002\u201D\u6211\u5BF9\u4E09\u59B9\u8892\u9732\u4E86\u5FC3\u58F0\uFF0C\u4E3A\u7684\u5C31\u662F\u8BA9\u5979\u4E0D\u518D\u90A3\u4E48\u7126\u8651\uFF0C\u5979\u54E5\u5F53\u5E74\u4E5F\u662F\u8FD9\u4E48\u8FC7\u6765\u7684\u3002</p><p>C \u8BED\u8A00\u662F\u5F88\u591A\u7F16\u7A0B\u8BED\u8A00\u7684\u6BCD\u80CE\uFF0C\u5305\u62EC Java\uFF0C\u90A3\u4E48\u5BF9\u4E8E C \u8BED\u8A00\u6765\u8BF4\uFF0C\u6240\u6709\u7684\u65B9\u6CD5\u53C2\u6570\u90FD\u662F\u201C\u901A\u8FC7\u503C\u201D\u4F20\u9012\u7684\uFF0C\u4E5F\u5C31\u662F\u8BF4\uFF0C\u4F20\u9012\u7ED9\u88AB\u8C03\u7528\u65B9\u6CD5\u7684\u53C2\u6570\u503C\u5B58\u653E\u5728\u4E34\u65F6\u53D8\u91CF\u4E2D\uFF0C\u800C\u4E0D\u662F\u5B58\u653E\u5728\u539F\u6765\u7684\u53D8\u91CF\u4E2D\u3002\u8FD9\u5C31\u610F\u5473\u7740\uFF0C\u88AB\u8C03\u7528\u7684\u65B9\u6CD5\u4E0D\u80FD\u4FEE\u6539\u8C03\u7528\u65B9\u6CD5\u4E2D\u53D8\u91CF\u7684\u503C\uFF0C\u800C\u53EA\u80FD\u4FEE\u6539\u5176\u79C1\u6709\u53D8\u91CF\u7684\u4E34\u65F6\u526F\u672C\u7684\u503C\u3002</p><p>Java \u7EE7\u627F\u4E86 C \u8BED\u8A00\u8FD9\u4E00\u7279\u6027\uFF0C\u56E0\u6B64 Java \u662F\u6309\u7167\u503C\u6765\u4F20\u9012\u7684\u3002</p><p>\u63A5\u4E0B\u6765\uFF0C\u6211\u4EEC\u5FC5\u987B\u5F97\u641E\u6E05\u695A\uFF0C\u5230\u5E95\u4EC0\u4E48\u662F\u503C\u4F20\u9012\uFF08pass by value\uFF09\uFF0C\u4EC0\u4E48\u662F\u5F15\u7528\u4F20\u9012\uFF08pass by reference\uFF09\uFF0C\u5426\u5219\uFF0C\u8BA8\u8BBA Java \u5230\u5E95\u662F\u503C\u4F20\u9012\u8FD8\u662F\u5F15\u7528\u4F20\u9012\u5C31\u663E\u5F97\u6BEB\u65E0\u610F\u4E49\u3002</p><p>\u5F53\u4E00\u4E2A\u53C2\u6570\u6309\u7167\u503C\u7684\u65B9\u5F0F\u5728\u4E24\u4E2A\u65B9\u6CD5\u4E4B\u95F4\u4F20\u9012\u65F6\uFF0C\u8C03\u7528\u8005\u548C\u88AB\u8C03\u7528\u8005\u5176\u5B9E\u662F\u7528\u7684\u4E24\u4E2A\u4E0D\u540C\u7684\u53D8\u91CF\u2014\u2014\u88AB\u8C03\u7528\u8005\u4E2D\u7684\u53D8\u91CF\uFF08\u539F\u59CB\u503C\uFF09\u662F\u8C03\u7528\u8005\u4E2D\u53D8\u91CF\u7684\u4E00\u4EFD\u62F7\u8D1D\uFF0C\u5BF9\u5B83\u4EEC\u5F53\u4E2D\u7684\u4EFB\u4F55\u4E00\u4E2A\u53D8\u91CF\u4FEE\u6539\u90FD\u4E0D\u4F1A\u5F71\u54CD\u5230\u53E6\u5916\u4E00\u4E2A\u53D8\u91CF\uFF0C\u636E\u8BF4 Fortran \u8BED\u8A00\u662F\u901A\u8FC7\u5F15\u7528\u4F20\u9012\u7684\u3002</p><p>\u201CFortran \u8BED\u8A00\uFF1F\u201D\u4E09\u59B9\u7741\u5927\u4E86\u53CC\u773C\uFF0C\u4F3C\u4E4E\u542C\u89C1\u4E86\u4EC0\u4E48\u65B0\u7684\u540D\u8BCD\u3002</p><p>\u201C\u662F\u7684\uFF0CFortran \u8BED\u8A00\uFF0C1957 \u5E74\u7531 IBM \u516C\u53F8\u5F00\u53D1\uFF0C\u662F\u4E16\u754C\u4E0A\u7B2C\u4E00\u4E2A\u88AB\u6B63\u5F0F\u91C7\u7528\u5E76\u6D41\u4F20\u81F3\u4ECA\u7684\u9AD8\u7EA7\u7F16\u7A0B\u8BED\u8A00\u3002\u201D</p><p>\u5F53\u4E00\u4E2A\u53C2\u6570\u6309\u7167\u5F15\u7528\u4F20\u9012\u7684\u65B9\u5F0F\u5728\u4E24\u4E2A\u65B9\u6CD5\u4E4B\u95F4\u4F20\u9012\u65F6\uFF0C\u8C03\u7528\u8005\u548C\u88AB\u8C03\u7528\u8005\u5176\u5B9E\u7528\u7684\u662F\u540C\u4E00\u4E2A\u53D8\u91CF\uFF0C\u5F53\u8BE5\u53D8\u91CF\u88AB\u4FEE\u6539\u65F6\uFF0C\u53CC\u65B9\u90FD\u662F\u53EF\u89C1\u7684\u3002</p><p>\u201C\u6211\u4EEC\u4E4B\u6240\u4EE5\u5BB9\u6613\u641E\u4E0D\u6E05\u695A Java \u5230\u5E95\u662F\u503C\u4F20\u9012\u8FD8\u662F\u5F15\u7528\u4F20\u9012\uFF0C\u4E3B\u8981\u662F\u56E0\u4E3A Java \u4E2D\u7684\u4E24\u7C7B\u6570\u636E\u7C7B\u578B\u7684\u53EB\u6CD5\u5BB9\u6613\u5F15\u53D1\u8BEF\u4F1A\uFF0C\u6BD4\u5982\u8BF4 int \u662F\u57FA\u672C\u7C7B\u578B\uFF0C\u8BF4\u5B83\u662F\u503C\u4F20\u9012\u7684\uFF0C\u6211\u4EEC\u5C31\u5F88\u5BB9\u6613\u7406\u89E3\uFF1B\u4F46\u5BF9\u4E8E\u5F15\u7528\u7C7B\u578B\uFF0C\u6BD4\u5982\u8BF4 String\uFF0C\u8BF4\u5B83\u4E5F\u662F\u503C\u4F20\u9012\u7684\u65F6\u5019\uFF0C\u6211\u4EEC\u5C31\u5BB9\u6613\u5F04\u4E0D\u660E\u767D\u3002\u201D</p><p>\u6211\u4EEC\u6765\u770B\u770B\u57FA\u672C\u6570\u636E\u7C7B\u578B\u548C\u5F15\u7528\u6570\u636E\u7C7B\u578B\u4E4B\u95F4\u7684\u5DEE\u522B\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">int</span> age <span class="token operator">=</span> <span class="token number">18</span><span class="token punctuation">;</span>
 <span class="token class-name">String</span> name <span class="token operator">=</span> <span class="token string">&quot;\u4E8C\u54E5&quot;</span><span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><p>age \u662F\u57FA\u672C\u7C7B\u578B\uFF0C\u503C\u5C31\u4FDD\u5B58\u5728\u53D8\u91CF\u4E2D\uFF0C\u800C name \u662F\u5F15\u7528\u7C7B\u578B\uFF0C\u53D8\u91CF\u4E2D\u4FDD\u5B58\u7684\u662F\u5BF9\u8C61\u7684\u5730\u5740\u3002\u4E00\u822C\u79F0\u8FD9\u79CD\u53D8\u91CF\u4E3A\u5BF9\u8C61\u7684\u5F15\u7528\uFF0C\u5F15\u7528\u5B58\u653E\u5728\u6808\u4E2D\uFF0C\u800C\u5BF9\u8C61\u5B58\u653E\u5728\u5806\u4E2D\u3002</p><p>\u8FD9\u91CC\u8BF4\u7684\u6808\u548C\u5806\uFF0C\u662F\u6307\u5185\u5B58\u4E2D\u7684\u4E00\u5757\u533A\u57DF\uFF0C\u548C\u6570\u636E\u7ED3\u6784\u4E2D\u7684\u6808\u548C\u5806\u4E0D\u4E00\u6837\u3002\u6808\u662F\u7531\u7F16\u8BD1\u5668\u81EA\u52A8\u5206\u914D\u91CA\u653E\u7684\uFF0C\u6240\u4EE5\u9002\u5408\u5B58\u653E\u7F16\u8BD1\u671F\u5C31\u786E\u5B9A\u751F\u547D\u5468\u671F\u7684\u6570\u636E\uFF1B\u800C\u5806\u4E2D\u5B58\u653E\u7684\u6570\u636E\uFF0C\u7F16\u8BD1\u5668\u662F\u4E0D\u9700\u8981\u77E5\u9053\u751F\u547D\u5468\u671F\u7684\uFF0C\u521B\u5EFA\u540E\u7684\u56DE\u6536\u5DE5\u4F5C\u7531\u5783\u573E\u6536\u96C6\u5668\u6765\u5B8C\u6210\u3002</p><p>\u201C\u753B\u5E45\u56FE\u3002\u201D</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/core-points/pass-by-value-01.png" alt=""></p><p>\u5F53\u7528 = \u8D4B\u503C\u8FD0\u7B97\u7B26\u6539\u53D8 age \u548C name \u7684\u503C\u65F6\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code>age <span class="token operator">=</span> <span class="token number">16</span><span class="token punctuation">;</span>
 name <span class="token operator">=</span> <span class="token string">&quot;\u4E09\u59B9&quot;</span><span class="token punctuation">;</span>
diff --git a/dist/assets/pdf.html.0610fb03.js b/dist/assets/pdf.html.79c228f5.js
similarity index 95%
rename from dist/assets/pdf.html.0610fb03.js
rename to dist/assets/pdf.html.79c228f5.js
index e60bdae4..d94b8a67 100644
--- a/dist/assets/pdf.html.0610fb03.js
+++ b/dist/assets/pdf.html.79c228f5.js
@@ -1 +1 @@
-import{_ as s}from"./plugin-vue_export-helper.21dcd24c.js";import{r as a,o as i,c as _,a as e,b as o,w as r,d as t}from"./app.a0271b9c.js";const c={},d=e("h1",{id:"pdf\u5E72\u8D27\u7B14\u8BB0\u{1F4DA}-\u9644\u4E0B\u8F7D\u5730\u5740",tabindex:"-1"},[e("a",{class:"header-anchor",href:"#pdf\u5E72\u8D27\u7B14\u8BB0\u{1F4DA}-\u9644\u4E0B\u8F7D\u5730\u5740","aria-hidden":"true"},"#"),t(" PDF\u5E72\u8D27\u7B14\u8BB0\u{1F4DA}\uFF0C\u9644\u4E0B\u8F7D\u5730\u5740")],-1),h=e("blockquote",null,[e("ul",null,[e("li",null,[e("strong",null,"\u627E\u4E0D\u5230\u4F18\u8D28\u7684\u5B66\u4E60\u8D44\u6E90"),t("\uFF1F\u8FD9\u4E9B\u95EE\u9898\u5728\u8FD9\u91CC\u7EDF\u7EDF\u90FD\u53EF\u4EE5\u627E\u5230\u7B54\u6848\u3002")]),e("li",null,"\u6211\u4F1A\u628A\u81EA\u5DF1\u5341\u591A\u5E74\u7684\u5B66\u4E60\u8D44\u6E90\u6BEB\u4E0D\u4FDD\u7559\u7684\u5206\u4EAB\u51FA\u6765\u3002")])],-1),u={href:"https://mp.weixin.qq.com/s/US5nTxbC2nYc1hWpn5Bozw",target:"_blank",rel:"noopener noreferrer"},p=t("\u{1F44F}\u4E0B\u8F7D\u2192\u6700\u5168\u6700\u786C\u6838\u7684Java\u9762\u8BD5 \u201C\u5907\u6218\u201D \u8D44\u6599"),f={href:"https://mp.weixin.qq.com/s/pxKrjw_5NTdZfHOKCkwn8w",target:"_blank",rel:"noopener noreferrer"},m=t("\u{1F44F}\u4E0B\u8F7D\u2192\u6DF1\u5165\u6D45\u51FAJava\u591A\u7EBF\u7A0B"),w={href:"https://mp.weixin.qq.com/s/d7Z0QoChNuP9bTwAGh2QCw",target:"_blank",rel:"noopener noreferrer"},x=t("\u{1F44F}\u4E0B\u8F7D\u2192GitHub\u661F\u6807115k+\u7684Java\u6559\u7A0B"),k={href:"https://mp.weixin.qq.com/s/PH5AizUAnTz0CuvJclpAKw",target:"_blank",rel:"noopener noreferrer"},b=t("\u{1F44F}\u4E0B\u8F7D\u2192\u91CD\u5B66Java\u8BBE\u8BA1\u6A21\u5F0F"),q={href:"https://mp.weixin.qq.com/s/FyoOPIMGcaeH0z5RMhxtaQ",target:"_blank",rel:"noopener noreferrer"},g=t("\u{1F44F}\u4E0B\u8F7D\u2192Java\u7248LeetCode\u5237\u9898\u7B14\u8BB0"),v=t("\u{1F44F}\u4E0B\u8F7D\u2192\u962E\u4E00\u5CF0C\u8BED\u8A00\u5165\u95E8\u6559\u7A0B"),C=t("\u{1F44F}\u4E0B\u8F7D\u2192BAT\u5927\u4F6C\u7684\u5237\u9898\u7B14\u8BB0"),T={href:"https://mp.weixin.qq.com/s/puTGbgU7xQnRcvz5hxGBHA",target:"_blank",rel:"noopener noreferrer"},A=t("\u{1F44F}\u4E0B\u8F7D\u2192\u7ED9\u64CD\u4F5C\u7CFB\u7EDF\u634B\u6761\u7EBF"),B=t("\u{1F44F}\u4E0B\u8F7D\u2192\u8C46\u74E39.1\u5206\uFF0CPro Git\u4E2D\u6587\u7248"),G=t("\u{1F44F}\u4E0B\u8F7D\u2192\u7B80\u5386\u6A21\u677F");function J(z,H){const n=a("ExternalLinkIcon"),l=a("RouterLink");return i(),_("div",null,[d,h,e("ul",null,[e("li",null,[e("a",u,[p,o(n)])]),e("li",null,[e("a",f,[m,o(n)])]),e("li",null,[e("a",w,[x,o(n)])]),e("li",null,[e("a",k,[b,o(n)])]),e("li",null,[e("a",q,[g,o(n)])]),e("li",null,[o(l,{to:"/download/yuanyifeng-c-language.html"},{default:r(()=>[v]),_:1})]),e("li",null,[o(l,{to:"/download/bat-shuati.html"},{default:r(()=>[C]),_:1})]),e("li",null,[e("a",T,[A,o(n)])]),e("li",null,[o(l,{to:"/download/progit.html"},{default:r(()=>[B]),_:1})]),e("li",null,[o(l,{to:"/download/jianli.html"},{default:r(()=>[G]),_:1})])])])}var P=s(c,[["render",J],["__file","pdf.html.vue"]]);export{P as default};
+import{_ as s}from"./plugin-vue_export-helper.21dcd24c.js";import{r as a,o as i,c as _,a as e,b as o,w as r,d as t}from"./app.615e41d8.js";const c={},d=e("h1",{id:"pdf\u5E72\u8D27\u7B14\u8BB0\u{1F4DA}-\u9644\u4E0B\u8F7D\u5730\u5740",tabindex:"-1"},[e("a",{class:"header-anchor",href:"#pdf\u5E72\u8D27\u7B14\u8BB0\u{1F4DA}-\u9644\u4E0B\u8F7D\u5730\u5740","aria-hidden":"true"},"#"),t(" PDF\u5E72\u8D27\u7B14\u8BB0\u{1F4DA}\uFF0C\u9644\u4E0B\u8F7D\u5730\u5740")],-1),h=e("blockquote",null,[e("ul",null,[e("li",null,[e("strong",null,"\u627E\u4E0D\u5230\u4F18\u8D28\u7684\u5B66\u4E60\u8D44\u6E90"),t("\uFF1F\u8FD9\u4E9B\u95EE\u9898\u5728\u8FD9\u91CC\u7EDF\u7EDF\u90FD\u53EF\u4EE5\u627E\u5230\u7B54\u6848\u3002")]),e("li",null,"\u6211\u4F1A\u628A\u81EA\u5DF1\u5341\u591A\u5E74\u7684\u5B66\u4E60\u8D44\u6E90\u6BEB\u4E0D\u4FDD\u7559\u7684\u5206\u4EAB\u51FA\u6765\u3002")])],-1),u={href:"https://mp.weixin.qq.com/s/US5nTxbC2nYc1hWpn5Bozw",target:"_blank",rel:"noopener noreferrer"},p=t("\u{1F44F}\u4E0B\u8F7D\u2192\u6700\u5168\u6700\u786C\u6838\u7684Java\u9762\u8BD5 \u201C\u5907\u6218\u201D \u8D44\u6599"),f={href:"https://mp.weixin.qq.com/s/pxKrjw_5NTdZfHOKCkwn8w",target:"_blank",rel:"noopener noreferrer"},m=t("\u{1F44F}\u4E0B\u8F7D\u2192\u6DF1\u5165\u6D45\u51FAJava\u591A\u7EBF\u7A0B"),w={href:"https://mp.weixin.qq.com/s/d7Z0QoChNuP9bTwAGh2QCw",target:"_blank",rel:"noopener noreferrer"},x=t("\u{1F44F}\u4E0B\u8F7D\u2192GitHub\u661F\u6807115k+\u7684Java\u6559\u7A0B"),k={href:"https://mp.weixin.qq.com/s/PH5AizUAnTz0CuvJclpAKw",target:"_blank",rel:"noopener noreferrer"},b=t("\u{1F44F}\u4E0B\u8F7D\u2192\u91CD\u5B66Java\u8BBE\u8BA1\u6A21\u5F0F"),q={href:"https://mp.weixin.qq.com/s/FyoOPIMGcaeH0z5RMhxtaQ",target:"_blank",rel:"noopener noreferrer"},g=t("\u{1F44F}\u4E0B\u8F7D\u2192Java\u7248LeetCode\u5237\u9898\u7B14\u8BB0"),v=t("\u{1F44F}\u4E0B\u8F7D\u2192\u962E\u4E00\u5CF0C\u8BED\u8A00\u5165\u95E8\u6559\u7A0B"),C=t("\u{1F44F}\u4E0B\u8F7D\u2192BAT\u5927\u4F6C\u7684\u5237\u9898\u7B14\u8BB0"),T={href:"https://mp.weixin.qq.com/s/puTGbgU7xQnRcvz5hxGBHA",target:"_blank",rel:"noopener noreferrer"},A=t("\u{1F44F}\u4E0B\u8F7D\u2192\u7ED9\u64CD\u4F5C\u7CFB\u7EDF\u634B\u6761\u7EBF"),B=t("\u{1F44F}\u4E0B\u8F7D\u2192\u8C46\u74E39.1\u5206\uFF0CPro Git\u4E2D\u6587\u7248"),G=t("\u{1F44F}\u4E0B\u8F7D\u2192\u7B80\u5386\u6A21\u677F");function J(z,H){const n=a("ExternalLinkIcon"),l=a("RouterLink");return i(),_("div",null,[d,h,e("ul",null,[e("li",null,[e("a",u,[p,o(n)])]),e("li",null,[e("a",f,[m,o(n)])]),e("li",null,[e("a",w,[x,o(n)])]),e("li",null,[e("a",k,[b,o(n)])]),e("li",null,[e("a",q,[g,o(n)])]),e("li",null,[o(l,{to:"/download/yuanyifeng-c-language.html"},{default:r(()=>[v]),_:1})]),e("li",null,[o(l,{to:"/download/bat-shuati.html"},{default:r(()=>[C]),_:1})]),e("li",null,[e("a",T,[A,o(n)])]),e("li",null,[o(l,{to:"/download/progit.html"},{default:r(()=>[B]),_:1})]),e("li",null,[o(l,{to:"/download/jianli.html"},{default:r(()=>[G]),_:1})])])])}var P=s(c,[["render",J],["__file","pdf.html.vue"]]);export{P as default};
diff --git a/dist/assets/pool.html.79813894.js b/dist/assets/pool.html.7274870a.js
similarity index 99%
rename from dist/assets/pool.html.79813894.js
rename to dist/assets/pool.html.7274870a.js
index a3c3acb5..43e4e728 100644
--- a/dist/assets/pool.html.79813894.js
+++ b/dist/assets/pool.html.7274870a.js
@@ -1,4 +1,4 @@
-import{_ as t}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o,c,a as n,b as a,e as l,d as e}from"./app.a0271b9c.js";const i={},u=l(`<h2 id="\u4E3A\u4EC0\u4E48\u8981\u4F7F\u7528\u7EBF\u7A0B\u6C60" tabindex="-1"><a class="header-anchor" href="#\u4E3A\u4EC0\u4E48\u8981\u4F7F\u7528\u7EBF\u7A0B\u6C60" aria-hidden="true">#</a> \u4E3A\u4EC0\u4E48\u8981\u4F7F\u7528\u7EBF\u7A0B\u6C60</h2><p>\u4F7F\u7528\u7EBF\u7A0B\u6C60\u4E3B\u8981\u6709\u4EE5\u4E0B\u4E09\u4E2A\u539F\u56E0\uFF1A</p><ol><li>\u521B\u5EFA/\u9500\u6BC1\u7EBF\u7A0B\u9700\u8981\u6D88\u8017\u7CFB\u7EDF\u8D44\u6E90\uFF0C\u7EBF\u7A0B\u6C60\u53EF\u4EE5<strong>\u590D\u7528\u5DF2\u521B\u5EFA\u7684\u7EBF\u7A0B</strong>\u3002</li><li><strong>\u63A7\u5236\u5E76\u53D1\u7684\u6570\u91CF</strong>\u3002\u5E76\u53D1\u6570\u91CF\u8FC7\u591A\uFF0C\u53EF\u80FD\u4F1A\u5BFC\u81F4\u8D44\u6E90\u6D88\u8017\u8FC7\u591A\uFF0C\u4ECE\u800C\u9020\u6210\u670D\u52A1\u5668\u5D29\u6E83\u3002\uFF08\u4E3B\u8981\u539F\u56E0\uFF09</li><li><strong>\u53EF\u4EE5\u5BF9\u7EBF\u7A0B\u505A\u7EDF\u4E00\u7BA1\u7406</strong>\u3002</li></ol><h2 id="\u7EBF\u7A0B\u6C60\u7684\u539F\u7406" tabindex="-1"><a class="header-anchor" href="#\u7EBF\u7A0B\u6C60\u7684\u539F\u7406" aria-hidden="true">#</a> \u7EBF\u7A0B\u6C60\u7684\u539F\u7406</h2><p>Java\u4E2D\u7684\u7EBF\u7A0B\u6C60\u9876\u5C42\u63A5\u53E3\u662F<code>Executor</code>\u63A5\u53E3\uFF0C<code>ThreadPoolExecutor</code>\u662F\u8FD9\u4E2A\u63A5\u53E3\u7684\u5B9E\u73B0\u7C7B\u3002</p><p>\u6211\u4EEC\u5148\u770B\u770B<code>ThreadPoolExecutor</code>\u7C7B\u3002</p><h3 id="threadpoolexecutor\u63D0\u4F9B\u7684\u6784\u9020\u65B9\u6CD5" tabindex="-1"><a class="header-anchor" href="#threadpoolexecutor\u63D0\u4F9B\u7684\u6784\u9020\u65B9\u6CD5" aria-hidden="true">#</a> ThreadPoolExecutor\u63D0\u4F9B\u7684\u6784\u9020\u65B9\u6CD5</h3><p>\u4E00\u5171\u6709\u56DB\u4E2A\u6784\u9020\u65B9\u6CD5\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token comment">// \u4E94\u4E2A\u53C2\u6570\u7684\u6784\u9020\u51FD\u6570</span>
+import{_ as t}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o,c,a as n,b as a,e as l,d as e}from"./app.615e41d8.js";const i={},u=l(`<h2 id="\u4E3A\u4EC0\u4E48\u8981\u4F7F\u7528\u7EBF\u7A0B\u6C60" tabindex="-1"><a class="header-anchor" href="#\u4E3A\u4EC0\u4E48\u8981\u4F7F\u7528\u7EBF\u7A0B\u6C60" aria-hidden="true">#</a> \u4E3A\u4EC0\u4E48\u8981\u4F7F\u7528\u7EBF\u7A0B\u6C60</h2><p>\u4F7F\u7528\u7EBF\u7A0B\u6C60\u4E3B\u8981\u6709\u4EE5\u4E0B\u4E09\u4E2A\u539F\u56E0\uFF1A</p><ol><li>\u521B\u5EFA/\u9500\u6BC1\u7EBF\u7A0B\u9700\u8981\u6D88\u8017\u7CFB\u7EDF\u8D44\u6E90\uFF0C\u7EBF\u7A0B\u6C60\u53EF\u4EE5<strong>\u590D\u7528\u5DF2\u521B\u5EFA\u7684\u7EBF\u7A0B</strong>\u3002</li><li><strong>\u63A7\u5236\u5E76\u53D1\u7684\u6570\u91CF</strong>\u3002\u5E76\u53D1\u6570\u91CF\u8FC7\u591A\uFF0C\u53EF\u80FD\u4F1A\u5BFC\u81F4\u8D44\u6E90\u6D88\u8017\u8FC7\u591A\uFF0C\u4ECE\u800C\u9020\u6210\u670D\u52A1\u5668\u5D29\u6E83\u3002\uFF08\u4E3B\u8981\u539F\u56E0\uFF09</li><li><strong>\u53EF\u4EE5\u5BF9\u7EBF\u7A0B\u505A\u7EDF\u4E00\u7BA1\u7406</strong>\u3002</li></ol><h2 id="\u7EBF\u7A0B\u6C60\u7684\u539F\u7406" tabindex="-1"><a class="header-anchor" href="#\u7EBF\u7A0B\u6C60\u7684\u539F\u7406" aria-hidden="true">#</a> \u7EBF\u7A0B\u6C60\u7684\u539F\u7406</h2><p>Java\u4E2D\u7684\u7EBF\u7A0B\u6C60\u9876\u5C42\u63A5\u53E3\u662F<code>Executor</code>\u63A5\u53E3\uFF0C<code>ThreadPoolExecutor</code>\u662F\u8FD9\u4E2A\u63A5\u53E3\u7684\u5B9E\u73B0\u7C7B\u3002</p><p>\u6211\u4EEC\u5148\u770B\u770B<code>ThreadPoolExecutor</code>\u7C7B\u3002</p><h3 id="threadpoolexecutor\u63D0\u4F9B\u7684\u6784\u9020\u65B9\u6CD5" tabindex="-1"><a class="header-anchor" href="#threadpoolexecutor\u63D0\u4F9B\u7684\u6784\u9020\u65B9\u6CD5" aria-hidden="true">#</a> ThreadPoolExecutor\u63D0\u4F9B\u7684\u6784\u9020\u65B9\u6CD5</h3><p>\u4E00\u5171\u6709\u56DB\u4E2A\u6784\u9020\u65B9\u6CD5\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token comment">// \u4E94\u4E2A\u53C2\u6570\u7684\u6784\u9020\u51FD\u6570</span>
 <span class="token keyword">public</span> <span class="token class-name">ThreadPoolExecutor</span><span class="token punctuation">(</span><span class="token keyword">int</span> corePoolSize<span class="token punctuation">,</span>
                           <span class="token keyword">int</span> maximumPoolSize<span class="token punctuation">,</span>
                           <span class="token keyword">long</span> keepAliveTime<span class="token punctuation">,</span>
diff --git a/dist/assets/print.html.f0b4f56c.js b/dist/assets/print.html.4135561a.js
similarity index 99%
rename from dist/assets/print.html.f0b4f56c.js
rename to dist/assets/print.html.4135561a.js
index c69de562..ed6abbe1 100644
--- a/dist/assets/print.html.f0b4f56c.js
+++ b/dist/assets/print.html.4135561a.js
@@ -1,4 +1,4 @@
-import{_ as e}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o,c,a,b as i,e as s,d as n}from"./app.a0271b9c.js";const l={},u=s(`<h1 id="\u5982\u4F55\u4F18\u96C5\u5730\u6253\u5370java\u6570\u7EC4" tabindex="-1"><a class="header-anchor" href="#\u5982\u4F55\u4F18\u96C5\u5730\u6253\u5370java\u6570\u7EC4" aria-hidden="true">#</a> \u5982\u4F55\u4F18\u96C5\u5730\u6253\u5370Java\u6570\u7EC4\uFF1F</h1><p>\u201C\u54E5\uFF0C\u4E4B\u524D\u542C\u4F60\u8BF4\uFF0C\u6570\u7EC4\u4E5F\u662F\u4E00\u4E2A\u5BF9\u8C61\uFF0C\u4F46 Java \u4E2D\u5E76\u672A\u660E\u786E\u7684\u5B9A\u4E49\u8FD9\u6837\u4E00\u4E2A\u7C7B\u3002\u201D\u770B\u6765\u4E09\u59B9\u6709\u5728\u7528\u5FC3\u5730\u5B66\u4E60\u3002</p><p>\u201C\u662F\u7684\uFF0C\u56E0\u6B64\u6570\u7EC4\u4E5F\u5C31\u6CA1\u6709\u673A\u4F1A\u8986\u76D6 <code>Object.toString()</code> \u65B9\u6CD5\u3002\u5982\u679C\u5C1D\u8BD5\u76F4\u63A5\u6253\u5370\u6570\u7EC4\u7684\u8BDD\uFF0C\u8F93\u51FA\u7684\u7ED3\u679C\u5E76\u4E0D\u662F\u6211\u4EEC\u9884\u671F\u7684\u7ED3\u679C\u3002\u201D\u6211\u63A5\u7740\u4E09\u59B9\u7684\u8BDD\u7EE7\u7EED\u8BF4\u3002</p><p>\u201C\u90A3\u600E\u4E48\u6253\u5370\u6570\u7EC4\u5462\uFF1F\u201D\u4E09\u59B9\u5FC3\u6709\u7075\u7280\u5730\u628A\u4ECA\u5929\u7684\u6838\u5FC3\u95EE\u9898\u63D0\u4E86\u51FA\u6765\u3002</p><p>\u201C\u9996\u5148\uFF0C\u6211\u4EEC\u6765\u770B\u4E00\u4E0B\uFF0C\u4E3A\u4EC0\u4E48\u4E0D\u80FD\u76F4\u63A5\u6253\u5370\u6570\u7EC4\uFF0C\u76F4\u63A5\u6253\u5370\u7684\u8BDD\uFF0C\u4F1A\u51FA\u73B0\u4EC0\u4E48\u95EE\u9898\u3002\u201D</p><p>\u6765\u770B\u8FD9\u6837\u4E00\u4E2A\u4F8B\u5B50\u3002</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>String [] cmowers = {&quot;\u6C89\u9ED8&quot;,&quot;\u738B\u4E8C&quot;,&quot;\u4E00\u679A\u6709\u8DA3\u7684\u7A0B\u5E8F\u5458&quot;};
+import{_ as e}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o,c,a,b as i,e as s,d as n}from"./app.615e41d8.js";const l={},u=s(`<h1 id="\u5982\u4F55\u4F18\u96C5\u5730\u6253\u5370java\u6570\u7EC4" tabindex="-1"><a class="header-anchor" href="#\u5982\u4F55\u4F18\u96C5\u5730\u6253\u5370java\u6570\u7EC4" aria-hidden="true">#</a> \u5982\u4F55\u4F18\u96C5\u5730\u6253\u5370Java\u6570\u7EC4\uFF1F</h1><p>\u201C\u54E5\uFF0C\u4E4B\u524D\u542C\u4F60\u8BF4\uFF0C\u6570\u7EC4\u4E5F\u662F\u4E00\u4E2A\u5BF9\u8C61\uFF0C\u4F46 Java \u4E2D\u5E76\u672A\u660E\u786E\u7684\u5B9A\u4E49\u8FD9\u6837\u4E00\u4E2A\u7C7B\u3002\u201D\u770B\u6765\u4E09\u59B9\u6709\u5728\u7528\u5FC3\u5730\u5B66\u4E60\u3002</p><p>\u201C\u662F\u7684\uFF0C\u56E0\u6B64\u6570\u7EC4\u4E5F\u5C31\u6CA1\u6709\u673A\u4F1A\u8986\u76D6 <code>Object.toString()</code> \u65B9\u6CD5\u3002\u5982\u679C\u5C1D\u8BD5\u76F4\u63A5\u6253\u5370\u6570\u7EC4\u7684\u8BDD\uFF0C\u8F93\u51FA\u7684\u7ED3\u679C\u5E76\u4E0D\u662F\u6211\u4EEC\u9884\u671F\u7684\u7ED3\u679C\u3002\u201D\u6211\u63A5\u7740\u4E09\u59B9\u7684\u8BDD\u7EE7\u7EED\u8BF4\u3002</p><p>\u201C\u90A3\u600E\u4E48\u6253\u5370\u6570\u7EC4\u5462\uFF1F\u201D\u4E09\u59B9\u5FC3\u6709\u7075\u7280\u5730\u628A\u4ECA\u5929\u7684\u6838\u5FC3\u95EE\u9898\u63D0\u4E86\u51FA\u6765\u3002</p><p>\u201C\u9996\u5148\uFF0C\u6211\u4EEC\u6765\u770B\u4E00\u4E0B\uFF0C\u4E3A\u4EC0\u4E48\u4E0D\u80FD\u76F4\u63A5\u6253\u5370\u6570\u7EC4\uFF0C\u76F4\u63A5\u6253\u5370\u7684\u8BDD\uFF0C\u4F1A\u51FA\u73B0\u4EC0\u4E48\u95EE\u9898\u3002\u201D</p><p>\u6765\u770B\u8FD9\u6837\u4E00\u4E2A\u4F8B\u5B50\u3002</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>String [] cmowers = {&quot;\u6C89\u9ED8&quot;,&quot;\u738B\u4E8C&quot;,&quot;\u4E00\u679A\u6709\u8DA3\u7684\u7A0B\u5E8F\u5458&quot;};
 System.out.println(cmowers);
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><p>\u7A0B\u5E8F\u6253\u5370\u7684\u7ED3\u679C\u662F\uFF1A</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>[Ljava.lang.String;@3d075dc0
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p><code>[Ljava.lang.String;</code> \u8868\u793A\u5B57\u7B26\u4E32\u6570\u7EC4\u7684 Class \u540D\uFF0C@ \u540E\u9762\u7684\u662F\u5341\u516D\u8FDB\u5236\u7684 hashCode\u2014\u2014\u8FD9\u6837\u7684\u6253\u5370\u7ED3\u679C\u592A\u201C\u4EBA\u6027\u5316\u201D\u4E86\uFF0C\u4E00\u822C\u4EBA\u8868\u793A\u770B\u4E0D\u61C2\uFF01\u4E3A\u4EC0\u4E48\u4F1A\u8FD9\u6837\u663E\u793A\u5462\uFF1F\u67E5\u770B\u4E00\u4E0B <code>java.lang.Object</code> \u7C7B\u7684 <code>toString()</code> \u65B9\u6CD5\u5C31\u660E\u767D\u4E86\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token class-name">String</span> <span class="token function">toString</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
diff --git a/dist/assets/problem-tools.html.c2bda786.js b/dist/assets/problem-tools.html.c0e0819e.js
similarity index 99%
rename from dist/assets/problem-tools.html.c2bda786.js
rename to dist/assets/problem-tools.html.c0e0819e.js
index 456013b4..36f51ccb 100644
--- a/dist/assets/problem-tools.html.c2bda786.js
+++ b/dist/assets/problem-tools.html.c0e0819e.js
@@ -1,4 +1,4 @@
-import{_ as s}from"./plugin-vue_export-helper.21dcd24c.js";import{r as n,o as p,c as o,a as e,b as r,e as i,d as a}from"./app.a0271b9c.js";const d={},l=i(`<h1 id="java\u95EE\u9898\u8BCA\u65AD\u548C\u6392\u67E5\u5DE5\u5177-\u67E5\u770Bjvm\u53C2\u6570\u3001\u5185\u5B58\u4F7F\u7528\u60C5\u51B5\u53CA\u5206\u6790" tabindex="-1"><a class="header-anchor" href="#java\u95EE\u9898\u8BCA\u65AD\u548C\u6392\u67E5\u5DE5\u5177-\u67E5\u770Bjvm\u53C2\u6570\u3001\u5185\u5B58\u4F7F\u7528\u60C5\u51B5\u53CA\u5206\u6790" aria-hidden="true">#</a> Java\u95EE\u9898\u8BCA\u65AD\u548C\u6392\u67E5\u5DE5\u5177\uFF08\u67E5\u770BJVM\u53C2\u6570\u3001\u5185\u5B58\u4F7F\u7528\u60C5\u51B5\u53CA\u5206\u6790\uFF09</h1><h2 id="jdk\u81EA\u5E26\u7684\u5DE5\u5177" tabindex="-1"><a class="header-anchor" href="#jdk\u81EA\u5E26\u7684\u5DE5\u5177" aria-hidden="true">#</a> JDK\u81EA\u5E26\u7684\u5DE5\u5177</h2><p>\u5728JDK\u7684bin\u76EE\u5F55\u4E0B\u6709\u5F88\u591A\u547D\u4EE4\u884C\u5DE5\u5177\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-547b1b2c-9fb4-4d1d-9c72-013ec210f6a5.jpg" alt=""></p><p>\u6211\u4EEC\u53EF\u4EE5\u770B\u5230\u5404\u4E2A\u5DE5\u5177\u7684\u5927\u5C0F\u57FA\u672C\u4E0A\u90FD\u7A33\u5B9A\u572827kb\u5DE6\u53F3\uFF0C\u8FD9\u4E2A\u4E0D\u662FJDK\u5F00\u53D1\u56E2\u961F\u523B\u610F\u4E3A\u4E4B\u7684\uFF0C\u800C\u662F\u56E0\u4E3A\u8FD9\u4E9B\u5DE5\u5177\u5927\u591A\u6570\u662F <code>jdk\\lib\\tools.jar</code> \u7C7B\u5E93\u7684\u4E00\u5C42\u8584\u5305\u88C5\u800C\u5DF2\uFF0C\u4ED6\u4EEC\u7684\u4E3B\u8981\u529F\u80FD\u4EE3\u7801\u662F\u5728tools\u7C7B\u5E93\u4E2D\u5B9E\u73B0\u7684\u3002</p><p>\u547D\u4EE4\u884C\u5DE5\u5177\u7684\u597D\u5904\u662F\uFF1A\u5F53\u5E94\u7528\u7A0B\u5E8F\u90E8\u7F72\u5230\u751F\u4EA7\u73AF\u5883\u540E\uFF0C\u65E0\u8BBA\u662F\u76F4\u63A5\u63A5\u89E6\u7269\u7406\u670D\u52A1\u5668\u8FD8\u662F\u8FDC\u7A0Btelnet\u5230\u670D\u52A1\u5668\u4E0A\u90FD\u4F1A\u53D7\u5230\u9650\u5236\u3002\u800C\u501F\u52A9tools.jar\u7C7B\u5E93\u91CC\u9762\u7684\u63A5\u53E3\uFF0C\u6211\u4EEC\u53EF\u4EE5\u76F4\u63A5\u5728\u5E94\u7528\u7A0B\u5E8F\u4E2D\u5B9E\u73B0\u529F\u80FD\u5F3A\u5927\u7684\u76D1\u63A7\u5206\u6790\u529F\u80FD\u3002</p><h3 id="\u5E38\u7528\u547D\u4EE4" tabindex="-1"><a class="header-anchor" href="#\u5E38\u7528\u547D\u4EE4" aria-hidden="true">#</a> \u5E38\u7528\u547D\u4EE4\uFF1A</h3><p>\u8FD9\u91CC\u4E3B\u8981\u4ECB\u7ECD\u5982\u4E0B\u51E0\u4E2A\u5DE5\u5177\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-01.png" alt=""></p><p>1\u3001jps\uFF1A\u67E5\u770B\u672C\u673Ajava\u8FDB\u7A0B\u4FE1\u606F</p><p>2\u3001jstack\uFF1A\u6253\u5370\u7EBF\u7A0B\u7684<strong>\u6808</strong>\u4FE1\u606F\uFF0C\u5236\u4F5C\xA0\u7EBF\u7A0Bdump\u6587\u4EF6</p><p>3\u3001jmap\uFF1A\u6253\u5370\u5185\u5B58\u6620\u5C04\u4FE1\u606F\uFF0C\u5236\u4F5C\xA0\u5806dump\u6587\u4EF6</p><p>4\u3001jstat\uFF1A\u6027\u80FD\u76D1\u63A7\u5DE5\u5177</p><p>5\u3001jhat\uFF1A\u5185\u5B58\u5206\u6790\u5DE5\u5177\uFF0C\u7528\u4E8E\u89E3\u6790\u5806dump\u6587\u4EF6\u5E76\u4EE5\u9002\u5408\u4EBA\u9605\u8BFB\u7684\u65B9\u5F0F\u5C55\u793A\u51FA\u6765</p><p>6\u3001jconsole\uFF1A\u7B80\u6613\u7684JVM\u53EF\u89C6\u5316\u5DE5\u5177</p><p>7\u3001jvisualvm\uFF1A\u529F\u80FD\u66F4\u5F3A\u5927\u7684JVM\u53EF\u89C6\u5316\u5DE5\u5177</p><p>8\u3001javap\uFF1A\u67E5\u770B\u5B57\u8282\u7801</p><h3 id="java-dump" tabindex="-1"><a class="header-anchor" href="#java-dump" aria-hidden="true">#</a> JAVA Dump\uFF1A</h3><p>JAVA Dump\u5C31\u662F\u865A\u62DF\u673A\u8FD0\u884C\u65F6\u7684\u5FEB\u7167\uFF0C\u5C06\u865A\u62DF\u673A\u8FD0\u884C\u65F6\u7684\u72B6\u6001\u548C\u4FE1\u606F\u4FDD\u5B58\u5230\u6587\u4EF6\u4E2D\uFF0C\u5305\u62EC\uFF1A</p><p>\u7EBF\u7A0Bdump\uFF1A\u5305\u542B\u6240\u6709\u7EBF\u7A0B\u7684\u8FD0\u884C\u72B6\u6001\uFF0C\u7EAF\u6587\u672C\u683C\u5F0F</p><p>\u5806dump\uFF1A\u5305\u542B\u6240\u6709\u5806\u5BF9\u8C61\u7684\u72B6\u6001\uFF0C\u4E8C\u8FDB\u5236\u683C\u5F0F</p><h2 id="_1\u3001jps" tabindex="-1"><a class="header-anchor" href="#_1\u3001jps" aria-hidden="true">#</a> 1\u3001jps</h2><p>\u663E\u793A\u5F53\u524D\u6240\u6709java\u8FDB\u7A0Bpid\u7684\u547D\u4EE4\uFF0C\u6211\u4EEC\u53EF\u4EE5\u901A\u8FC7\u8FD9\u4E2A\u547D\u4EE4\u6765\u67E5\u770B\u5230\u5E95\u542F\u52A8\u4E86\u51E0\u4E2Ajava\u8FDB\u7A0B\uFF08\u56E0\u4E3A\u6BCF\u4E00\u4E2Ajava\u7A0B\u5E8F\u90FD\u4F1A\u72EC\u5360\u4E00\u4E2Ajava\u865A\u62DF\u673A\u5B9E\u4F8B\uFF09\uFF0C\u4E0D\u8FC7jps\u6709\u4E2A\u7F3A\u70B9\u662F\u53EA\u80FD\u663E\u793A\u5F53\u524D\u7528\u6237\u7684\u8FDB\u7A0Bid\uFF0C\u8981\u663E\u793A\u5176\u4ED6\u7528\u6237\u7684\u8FD8\u53EA\u80FD\u7528linux\u7684ps\u547D\u4EE4\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-2017daf6-832a-4673-b776-ad3380e47402.png" alt=""></p><p>\u6267\u884Cjps\u547D\u4EE4\uFF0C\u4F1A\u5217\u51FA\u6240\u6709\u6B63\u5728\u8FD0\u884C\u7684java\u8FDB\u7A0B\uFF0C\u5176\u4E2Djps\u547D\u4EE4\u4E5F\u662F\u4E00\u4E2Ajava\u7A0B\u5E8F\u3002\u524D\u9762\u7684\u6570\u5B57\u5C31\u662F\u8FDB\u7A0B\u7684id\uFF0C\u8FD9\u4E2Aid\u7684\u4F5C\u7528\u975E\u5E38\u5927\uFF0C\u540E\u9762\u4F1A\u6709\u76F8\u5173\u4ECB\u7ECD\u3002</p><p><strong>jps -help\uFF1A</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-031be661-e47e-44f0-9e33-34368b187662.png" alt=""></p><p><strong>jps -l</strong>\xA0\u8F93\u51FA\u5E94\u7528\u7A0B\u5E8Fmain.class\u7684\u5B8C\u6574package\u540D\u6216\u8005\u5E94\u7528\u7A0B\u5E8Fjar\u6587\u4EF6\u5B8C\u6574\u8DEF\u5F84\u540D</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-0ccc96dc-8053-4222-9824-b116f02776a4.png" alt=""></p><p><strong>jps -v</strong>\xA0\u8F93\u51FA\u4F20\u9012\u7ED9JVM\u7684\u53C2\u6570</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-059a3285-4a01-4f7a-a6ed-1cc5dcbf3f18.png" alt=""></p><p><strong>jps\u5931\u6548</strong></p><p>\u6211\u4EEC\u5728\u5B9A\u4F4D\u95EE\u9898\u8FC7\u7A0B\u4F1A\u9047\u5230\u8FD9\u6837\u4E00\u79CD\u60C5\u51B5\uFF0C\u7528jps\u67E5\u770B\u4E0D\u5230\u8FDB\u7A0Bid\uFF0C\u7528ps -ef | grep java\u5374\u80FD\u770B\u5230\u542F\u52A8\u7684java\u8FDB\u7A0B\u3002</p><p>\u8981\u89E3\u91CA\u8FD9\u79CD\u73B0\u8C61\uFF0C\u5148\u6765\u4E86\u89E3\u4E0Bjps\u7684\u5B9E\u73B0\u673A\u5236\uFF1A</p><p>java\u7A0B\u5E8F\u542F\u52A8\u540E\uFF0C\u4F1A\u5728\u76EE\u5F55/tmp/hsperfdata_{userName}/\u4E0B\u751F\u6210\u51E0\u4E2A\u6587\u4EF6\uFF0C\u6587\u4EF6\u540D\u5C31\u662Fjava\u8FDB\u7A0B\u7684pid\uFF0C\u56E0\u6B64jps\u5217\u51FA\u8FDB\u7A0Bid\u5C31\u662F\u628A\u8FD9\u4E2A\u76EE\u5F55\u4E0B\u7684\u6587\u4EF6\u540D\u5217\u4E00\u4E0B\u800C\u5DF2\uFF0C\u81F3\u4E8E\u7CFB\u7EDF\u53C2\u6570\uFF0C\u5219\u662F\u8BFB\u53D6\u6587\u4EF6\u4E2D\u7684\u5185\u5BB9\u3002</p><p>\u6211\u4EEC\u6765\u601D\u8003\u4E0B\uFF1A<strong>\u5982\u679C\u7531\u4E8E\u78C1\u76D8\u6EE1\u4E86\uFF0C\u65E0\u6CD5\u521B\u5EFA\u8FD9\u4E9B\u6587\u4EF6\uFF0C\u6216\u8005\u7528\u6237\u5BF9\u8FD9\u4E9B\u6587\u4EF6\u6CA1\u6709\u8BFB\u7684\u6743\u9650\u3002\u53C8\u6216\u8005\u56E0\u4E3A\u67D0\u79CD\u539F\u56E0\u8FD9\u4E9B\u6587\u4EF6\u6216\u8005\u76EE\u5F55\u88AB\u6E05\u9664\uFF0C\u51FA\u73B0\u4EE5\u4E0A\u8FD9\u4E9B\u60C5\u51B5\uFF0C\u5C31\u4F1A\u5BFC\u81F4jps\u547D\u4EE4\u5931\u6548\u3002</strong></p><p>\u5982\u679Cjps\u547D\u4EE4\u5931\u6548\uFF0C\u800C\u6211\u4EEC\u53C8\u8981\u83B7\u53D6pid\uFF0C\u8FD8\u53EF\u4EE5\u4F7F\u7528\u4EE5\u4E0B\u4E24\u79CD\u65B9\u6CD5\uFF1A</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>1\u3001top | grep java
+import{_ as s}from"./plugin-vue_export-helper.21dcd24c.js";import{r as n,o as p,c as o,a as e,b as r,e as i,d as a}from"./app.615e41d8.js";const d={},l=i(`<h1 id="java\u95EE\u9898\u8BCA\u65AD\u548C\u6392\u67E5\u5DE5\u5177-\u67E5\u770Bjvm\u53C2\u6570\u3001\u5185\u5B58\u4F7F\u7528\u60C5\u51B5\u53CA\u5206\u6790" tabindex="-1"><a class="header-anchor" href="#java\u95EE\u9898\u8BCA\u65AD\u548C\u6392\u67E5\u5DE5\u5177-\u67E5\u770Bjvm\u53C2\u6570\u3001\u5185\u5B58\u4F7F\u7528\u60C5\u51B5\u53CA\u5206\u6790" aria-hidden="true">#</a> Java\u95EE\u9898\u8BCA\u65AD\u548C\u6392\u67E5\u5DE5\u5177\uFF08\u67E5\u770BJVM\u53C2\u6570\u3001\u5185\u5B58\u4F7F\u7528\u60C5\u51B5\u53CA\u5206\u6790\uFF09</h1><h2 id="jdk\u81EA\u5E26\u7684\u5DE5\u5177" tabindex="-1"><a class="header-anchor" href="#jdk\u81EA\u5E26\u7684\u5DE5\u5177" aria-hidden="true">#</a> JDK\u81EA\u5E26\u7684\u5DE5\u5177</h2><p>\u5728JDK\u7684bin\u76EE\u5F55\u4E0B\u6709\u5F88\u591A\u547D\u4EE4\u884C\u5DE5\u5177\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-547b1b2c-9fb4-4d1d-9c72-013ec210f6a5.jpg" alt=""></p><p>\u6211\u4EEC\u53EF\u4EE5\u770B\u5230\u5404\u4E2A\u5DE5\u5177\u7684\u5927\u5C0F\u57FA\u672C\u4E0A\u90FD\u7A33\u5B9A\u572827kb\u5DE6\u53F3\uFF0C\u8FD9\u4E2A\u4E0D\u662FJDK\u5F00\u53D1\u56E2\u961F\u523B\u610F\u4E3A\u4E4B\u7684\uFF0C\u800C\u662F\u56E0\u4E3A\u8FD9\u4E9B\u5DE5\u5177\u5927\u591A\u6570\u662F <code>jdk\\lib\\tools.jar</code> \u7C7B\u5E93\u7684\u4E00\u5C42\u8584\u5305\u88C5\u800C\u5DF2\uFF0C\u4ED6\u4EEC\u7684\u4E3B\u8981\u529F\u80FD\u4EE3\u7801\u662F\u5728tools\u7C7B\u5E93\u4E2D\u5B9E\u73B0\u7684\u3002</p><p>\u547D\u4EE4\u884C\u5DE5\u5177\u7684\u597D\u5904\u662F\uFF1A\u5F53\u5E94\u7528\u7A0B\u5E8F\u90E8\u7F72\u5230\u751F\u4EA7\u73AF\u5883\u540E\uFF0C\u65E0\u8BBA\u662F\u76F4\u63A5\u63A5\u89E6\u7269\u7406\u670D\u52A1\u5668\u8FD8\u662F\u8FDC\u7A0Btelnet\u5230\u670D\u52A1\u5668\u4E0A\u90FD\u4F1A\u53D7\u5230\u9650\u5236\u3002\u800C\u501F\u52A9tools.jar\u7C7B\u5E93\u91CC\u9762\u7684\u63A5\u53E3\uFF0C\u6211\u4EEC\u53EF\u4EE5\u76F4\u63A5\u5728\u5E94\u7528\u7A0B\u5E8F\u4E2D\u5B9E\u73B0\u529F\u80FD\u5F3A\u5927\u7684\u76D1\u63A7\u5206\u6790\u529F\u80FD\u3002</p><h3 id="\u5E38\u7528\u547D\u4EE4" tabindex="-1"><a class="header-anchor" href="#\u5E38\u7528\u547D\u4EE4" aria-hidden="true">#</a> \u5E38\u7528\u547D\u4EE4\uFF1A</h3><p>\u8FD9\u91CC\u4E3B\u8981\u4ECB\u7ECD\u5982\u4E0B\u51E0\u4E2A\u5DE5\u5177\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-01.png" alt=""></p><p>1\u3001jps\uFF1A\u67E5\u770B\u672C\u673Ajava\u8FDB\u7A0B\u4FE1\u606F</p><p>2\u3001jstack\uFF1A\u6253\u5370\u7EBF\u7A0B\u7684<strong>\u6808</strong>\u4FE1\u606F\uFF0C\u5236\u4F5C\xA0\u7EBF\u7A0Bdump\u6587\u4EF6</p><p>3\u3001jmap\uFF1A\u6253\u5370\u5185\u5B58\u6620\u5C04\u4FE1\u606F\uFF0C\u5236\u4F5C\xA0\u5806dump\u6587\u4EF6</p><p>4\u3001jstat\uFF1A\u6027\u80FD\u76D1\u63A7\u5DE5\u5177</p><p>5\u3001jhat\uFF1A\u5185\u5B58\u5206\u6790\u5DE5\u5177\uFF0C\u7528\u4E8E\u89E3\u6790\u5806dump\u6587\u4EF6\u5E76\u4EE5\u9002\u5408\u4EBA\u9605\u8BFB\u7684\u65B9\u5F0F\u5C55\u793A\u51FA\u6765</p><p>6\u3001jconsole\uFF1A\u7B80\u6613\u7684JVM\u53EF\u89C6\u5316\u5DE5\u5177</p><p>7\u3001jvisualvm\uFF1A\u529F\u80FD\u66F4\u5F3A\u5927\u7684JVM\u53EF\u89C6\u5316\u5DE5\u5177</p><p>8\u3001javap\uFF1A\u67E5\u770B\u5B57\u8282\u7801</p><h3 id="java-dump" tabindex="-1"><a class="header-anchor" href="#java-dump" aria-hidden="true">#</a> JAVA Dump\uFF1A</h3><p>JAVA Dump\u5C31\u662F\u865A\u62DF\u673A\u8FD0\u884C\u65F6\u7684\u5FEB\u7167\uFF0C\u5C06\u865A\u62DF\u673A\u8FD0\u884C\u65F6\u7684\u72B6\u6001\u548C\u4FE1\u606F\u4FDD\u5B58\u5230\u6587\u4EF6\u4E2D\uFF0C\u5305\u62EC\uFF1A</p><p>\u7EBF\u7A0Bdump\uFF1A\u5305\u542B\u6240\u6709\u7EBF\u7A0B\u7684\u8FD0\u884C\u72B6\u6001\uFF0C\u7EAF\u6587\u672C\u683C\u5F0F</p><p>\u5806dump\uFF1A\u5305\u542B\u6240\u6709\u5806\u5BF9\u8C61\u7684\u72B6\u6001\uFF0C\u4E8C\u8FDB\u5236\u683C\u5F0F</p><h2 id="_1\u3001jps" tabindex="-1"><a class="header-anchor" href="#_1\u3001jps" aria-hidden="true">#</a> 1\u3001jps</h2><p>\u663E\u793A\u5F53\u524D\u6240\u6709java\u8FDB\u7A0Bpid\u7684\u547D\u4EE4\uFF0C\u6211\u4EEC\u53EF\u4EE5\u901A\u8FC7\u8FD9\u4E2A\u547D\u4EE4\u6765\u67E5\u770B\u5230\u5E95\u542F\u52A8\u4E86\u51E0\u4E2Ajava\u8FDB\u7A0B\uFF08\u56E0\u4E3A\u6BCF\u4E00\u4E2Ajava\u7A0B\u5E8F\u90FD\u4F1A\u72EC\u5360\u4E00\u4E2Ajava\u865A\u62DF\u673A\u5B9E\u4F8B\uFF09\uFF0C\u4E0D\u8FC7jps\u6709\u4E2A\u7F3A\u70B9\u662F\u53EA\u80FD\u663E\u793A\u5F53\u524D\u7528\u6237\u7684\u8FDB\u7A0Bid\uFF0C\u8981\u663E\u793A\u5176\u4ED6\u7528\u6237\u7684\u8FD8\u53EA\u80FD\u7528linux\u7684ps\u547D\u4EE4\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-2017daf6-832a-4673-b776-ad3380e47402.png" alt=""></p><p>\u6267\u884Cjps\u547D\u4EE4\uFF0C\u4F1A\u5217\u51FA\u6240\u6709\u6B63\u5728\u8FD0\u884C\u7684java\u8FDB\u7A0B\uFF0C\u5176\u4E2Djps\u547D\u4EE4\u4E5F\u662F\u4E00\u4E2Ajava\u7A0B\u5E8F\u3002\u524D\u9762\u7684\u6570\u5B57\u5C31\u662F\u8FDB\u7A0B\u7684id\uFF0C\u8FD9\u4E2Aid\u7684\u4F5C\u7528\u975E\u5E38\u5927\uFF0C\u540E\u9762\u4F1A\u6709\u76F8\u5173\u4ECB\u7ECD\u3002</p><p><strong>jps -help\uFF1A</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-031be661-e47e-44f0-9e33-34368b187662.png" alt=""></p><p><strong>jps -l</strong>\xA0\u8F93\u51FA\u5E94\u7528\u7A0B\u5E8Fmain.class\u7684\u5B8C\u6574package\u540D\u6216\u8005\u5E94\u7528\u7A0B\u5E8Fjar\u6587\u4EF6\u5B8C\u6574\u8DEF\u5F84\u540D</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-0ccc96dc-8053-4222-9824-b116f02776a4.png" alt=""></p><p><strong>jps -v</strong>\xA0\u8F93\u51FA\u4F20\u9012\u7ED9JVM\u7684\u53C2\u6570</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-059a3285-4a01-4f7a-a6ed-1cc5dcbf3f18.png" alt=""></p><p><strong>jps\u5931\u6548</strong></p><p>\u6211\u4EEC\u5728\u5B9A\u4F4D\u95EE\u9898\u8FC7\u7A0B\u4F1A\u9047\u5230\u8FD9\u6837\u4E00\u79CD\u60C5\u51B5\uFF0C\u7528jps\u67E5\u770B\u4E0D\u5230\u8FDB\u7A0Bid\uFF0C\u7528ps -ef | grep java\u5374\u80FD\u770B\u5230\u542F\u52A8\u7684java\u8FDB\u7A0B\u3002</p><p>\u8981\u89E3\u91CA\u8FD9\u79CD\u73B0\u8C61\uFF0C\u5148\u6765\u4E86\u89E3\u4E0Bjps\u7684\u5B9E\u73B0\u673A\u5236\uFF1A</p><p>java\u7A0B\u5E8F\u542F\u52A8\u540E\uFF0C\u4F1A\u5728\u76EE\u5F55/tmp/hsperfdata_{userName}/\u4E0B\u751F\u6210\u51E0\u4E2A\u6587\u4EF6\uFF0C\u6587\u4EF6\u540D\u5C31\u662Fjava\u8FDB\u7A0B\u7684pid\uFF0C\u56E0\u6B64jps\u5217\u51FA\u8FDB\u7A0Bid\u5C31\u662F\u628A\u8FD9\u4E2A\u76EE\u5F55\u4E0B\u7684\u6587\u4EF6\u540D\u5217\u4E00\u4E0B\u800C\u5DF2\uFF0C\u81F3\u4E8E\u7CFB\u7EDF\u53C2\u6570\uFF0C\u5219\u662F\u8BFB\u53D6\u6587\u4EF6\u4E2D\u7684\u5185\u5BB9\u3002</p><p>\u6211\u4EEC\u6765\u601D\u8003\u4E0B\uFF1A<strong>\u5982\u679C\u7531\u4E8E\u78C1\u76D8\u6EE1\u4E86\uFF0C\u65E0\u6CD5\u521B\u5EFA\u8FD9\u4E9B\u6587\u4EF6\uFF0C\u6216\u8005\u7528\u6237\u5BF9\u8FD9\u4E9B\u6587\u4EF6\u6CA1\u6709\u8BFB\u7684\u6743\u9650\u3002\u53C8\u6216\u8005\u56E0\u4E3A\u67D0\u79CD\u539F\u56E0\u8FD9\u4E9B\u6587\u4EF6\u6216\u8005\u76EE\u5F55\u88AB\u6E05\u9664\uFF0C\u51FA\u73B0\u4EE5\u4E0A\u8FD9\u4E9B\u60C5\u51B5\uFF0C\u5C31\u4F1A\u5BFC\u81F4jps\u547D\u4EE4\u5931\u6548\u3002</strong></p><p>\u5982\u679Cjps\u547D\u4EE4\u5931\u6548\uFF0C\u800C\u6211\u4EEC\u53C8\u8981\u83B7\u53D6pid\uFF0C\u8FD8\u53EF\u4EE5\u4F7F\u7528\u4EE5\u4E0B\u4E24\u79CD\u65B9\u6CD5\uFF1A</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>1\u3001top | grep java
 2\u3001ps -ef |grep java
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><h2 id="_2\u3001jstack" tabindex="-1"><a class="header-anchor" href="#_2\u3001jstack" aria-hidden="true">#</a> 2\u3001jstack</h2><p>\u4E3B\u8981\u7528\u4E8E\u751F\u6210\u6307\u5B9A\u8FDB\u7A0B\u5F53\u524D\u65F6\u523B\u7684\u7EBF\u7A0B\u5FEB\u7167\uFF0C\u7EBF\u7A0B\u5FEB\u7167\u662F\u5F53\u524Djava\u865A\u62DF\u673A\u6BCF\u4E00\u6761\u7EBF\u7A0B\u6B63\u5728\u6267\u884C\u7684\u65B9\u6CD5\u5806\u6808\u7684\u96C6\u5408\uFF0C\u751F\u6210\u7EBF\u7A0B\u5FEB\u7167\u7684\u4E3B\u8981\u76EE\u7684\u662F\u7528\u4E8E\u5B9A\u4F4D\u7EBF\u7A0B\u51FA\u73B0\u957F\u65F6\u95F4\u505C\u987F\u7684\u539F\u56E0\uFF0C\u5982\u7EBF\u7A0B\u95F4\u6B7B\u9501\u3001\u6B7B\u5FAA\u73AF\u3001\u8BF7\u6C42\u5916\u90E8\u8D44\u6E90\u5BFC\u81F4\u957F\u65F6\u95F4\u7B49\u5F85\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-e80d0925-2dcf-4204-b46d-47312df2a673.png" alt=""></p><p><strong>3\u3001jmap</strong></p><p>\u4E3B\u8981\u7528\u4E8E\u6253\u5370\u6307\u5B9Ajava\u8FDB\u7A0B\u7684\u5171\u4EAB\u5BF9\u8C61\u5185\u5B58\u6620\u5C04\u6216\u5806\u5185\u5B58\u7EC6\u8282\u3002</p><p><strong>\u5806Dump\u662F\u53CD\u6620\u5806\u4F7F\u7528\u60C5\u51B5\u7684\u5185\u5B58\u955C\u50CF\uFF0C\u5176\u4E2D\u4E3B\u8981\u5305\u62EC\u7CFB\u7EDF\u4FE1\u606F\u3001\u865A\u62DF\u673A\u5C5E\u6027\u3001\u5B8C\u6574\u7684\u7EBF\u7A0BDump\u3001\u6240\u6709\u7C7B\u548C\u5BF9\u8C61\u7684\u72B6\u6001\u7B49\u3002\u4E00\u822C\u5728\u5185\u5B58\u4E0D\u8DB3\uFF0CGC\u5F02\u5E38\u7B49\u60C5\u51B5\u4E0B\uFF0C\u6211\u4EEC\u4F1A\u53BB\u6000\u7591\u5185\u5B58\u6CC4\u6F0F\uFF0C\u8FD9\u4E2A\u65F6\u5019\u5C31\u4F1A\u53BB\u6253\u5370\u5806Dump\u3002</strong></p><p>jmap\u7684\u7528\u6CD5\u6458\u8981\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-96a70bab-5cee-4068-8ccb-1d35124abeea.png" alt=""></p><p><strong>1\u3001<code>jmap pid</code></strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-38d5c9da-e433-43d2-b1bc-3f3634e05497.png" alt=""></p><p>\u6253\u5370\u7684\u4FE1\u606F\u5206\u522B\u4E3A\uFF1A\u5171\u4EAB\u5BF9\u8C61\u7684\u8D77\u59CB\u5730\u5740\u3001\u6620\u5C04\u5927\u5C0F\u3001\u5171\u4EAB\u5BF9\u8C61\u8DEF\u5F84\u7684\u5168\u7A0B\u3002</p><p><strong>2\u3001<code>jmap -heap pid</code>:\u67E5\u770B\u5806\u4F7F\u7528\u60C5\u51B5</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-75acf4c8-393d-43d1-b208-04de1f0ba6bd.png" alt=""></p><p><strong>3\u3001<code>jmap -histo pid</code>\uFF1A\u67E5\u770B\u5806\u4E2D\u5BF9\u8C61\u6570\u91CF\u548C\u5927\u5C0F</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-5e42fe47-e1e6-4649-acb5-e17bd277a771.png" alt=""></p><p>\u6253\u5370\u7684\u4FE1\u606F\u5206\u522B\u662F\uFF1A\u5E8F\u5217\u53F7\u3001\u5BF9\u8C61\u7684\u6570\u91CF\u3001\u8FD9\u4E9B\u5BF9\u8C61\u7684\u5185\u5B58\u5360\u7528\u5927\u5C0F\u3001\u8FD9\u4E9B\u5BF9\u8C61\u6240\u5C5E\u7684\u7C7B\u7684\u5168\u9650\u5B9A\u540D</p><p>\u5982\u679C\u662F\u5185\u90E8\u7C7B\uFF0C\u7C7B\u540D\u7684\u5F00\u5934\u4F1A\u52A0\u4E0A*\uFF0C\u5982\u679C\u52A0\u4E0Alive\u5B50\u53C2\u6570\u7684\u8BDD\uFF0C\u5982jmap -histo\uFF1Alive pid\uFF0C\u8FD9\u4E2A\u547D\u540D\u4F1A\u89E6\u53D1\u4E00\u6B21FUll GC\uFF0C\u53EA\u7EDF\u8BA1\u5B58\u6D3B\u5BF9\u8C61</p><p><strong>4\u3001<code>jmap -dump:format=b,file=heapdump pid</code>\uFF1A\u5C06\u5185\u5B58\u4F7F\u7528\u7684\u8BE6\u7EC6\u60C5\u51B5\u8F93\u51FA\u5230\u6587\u4EF6</strong></p><p>\u7136\u540E\u4F7F\u7528jhat\u547D\u4EE4\u67E5\u770B\u8BE5\u6587\u4EF6\uFF1Ajhat -port 4000 \u6587\u4EF6\u540D \uFF0C\u5728\u6D4F\u89C8\u5668\u4E2D\u8BBF\u95EEhttp:localhost:4000/</p><p>\u603B\u7ED3\uFF1A</p><p>\u8BE5\u547D\u4EE4\u9002\u7528\u7684\u573A\u666F\u662F\u7A0B\u5E8F\u5185\u5B58\u4E0D\u8DB3\u6216\u8005GC\u9891\u7E41\uFF0C\u8FD9\u65F6\u5019\u5F88\u53EF\u80FD\u662F\u5185\u5B58\u6CC4\u6F0F\u3002\u901A\u8FC7\u7528\u4EE5\u4E0A\u547D\u4EE4\u67E5\u770B\u5806\u4F7F\u7528\u60C5\u51B5\u3001\u5927\u91CF\u5BF9\u8C61\u88AB\u6301\u7EED\u5F15\u7528\u7B49\u60C5\u51B5\u3002</p><h2 id="_4\u3001jstat" tabindex="-1"><a class="header-anchor" href="#_4\u3001jstat" aria-hidden="true">#</a> <strong>4\u3001jstat</strong></h2><p>\u4E3B\u8981\u662F\u5BF9java\u5E94\u7528\u7A0B\u5E8F\u7684\u8D44\u6E90\u548C\u6027\u80FD\u8FDB\u884C\u5B9E\u65F6\u7684\u547D\u4EE4\u884C\u76D1\u63A7\uFF0C\u5305\u62EC\u4E86\u5BF9heap size\u548C\u5783\u573E\u56DE\u6536\u72B6\u51B5\u7684\u76D1\u63A7\u3002</p><p><code>jstat -&lt;option&gt; [-t] [-h&lt;lines&gt;] &lt;vmid&gt; [&lt;interval&gt; [&lt;count&gt;]]</code></p><p>option\uFF1A\u6211\u4EEC\u7ECF\u5E38\u4F7F\u7528\u7684\u9009\u9879\u6709gc\u3001gcutil</p><p>vmid\uFF1Ajava\u8FDB\u7A0Bid</p><p>interval\uFF1A\u95F4\u9694\u65F6\u95F4\uFF0C\u5355\u4F4D\u4E3A\u6BEB\u79D2</p><p>count\uFF1A\u6253\u5370\u6B21\u6570</p><p><strong>1\u3001jstat -gc PID 5000 20</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-3f71397d-3ff6-430d-adf4-ff5ab9f111d5.png" alt=""></p><p>S0C:\u5E74\u8F7B\u4EE3\u7B2C\u4E00\u4E2Asurvivor\u7684\u5BB9\u91CF\uFF08\u5B57\u8282\uFF09</p><p>S1C\uFF1A\u5E74\u8F7B\u4EE3\u7B2C\u4E8C\u4E2Asurvivor\u7684\u5BB9\u91CF\uFF08\u5B57\u8282\uFF09</p><p>S0U\uFF1A\u5E74\u8F7B\u4EE3\u7B2C\u4E00\u4E2Asurvivor\u5DF2\u4F7F\u7528\u7684\u5BB9\u91CF\uFF08\u5B57\u8282\uFF09</p><p>S1U\uFF1A\u5E74\u8F7B\u4EE3\u7B2C\u4E8C\u4E2Asurvivor\u5DF2\u4F7F\u7528\u7684\u5BB9\u91CF\uFF08\u5B57\u8282\uFF09</p><p>EC\uFF1A\u5E74\u8F7B\u4EE3\u4E2DEden\u7684\u7A7A\u95F4\uFF08\u5B57\u8282\uFF09</p><p>EU\uFF1A\u5E74\u4EE3\u4EE3\u4E2DEden\u5DF2\u4F7F\u7528\u7684\u7A7A\u95F4\uFF08\u5B57\u8282\uFF09</p><p>OC\uFF1A\u8001\u5E74\u4EE3\u7684\u5BB9\u91CF\uFF08\u5B57\u8282\uFF09</p><p>OU:\u8001\u5E74\u4EE3\u4E2D\u5DF2\u4F7F\u7528\u7684\u7A7A\u95F4\uFF08\u5B57\u8282\uFF09</p><p>PC\uFF1A\u6C38\u4E45\u4EE3\u7684\u5BB9\u91CF</p><p>PU\uFF1A\u6C38\u4E45\u4EE3\u5DF2\u4F7F\u7528\u7684\u5BB9\u91CF</p><p>YGC\uFF1A\u4ECE\u5E94\u7528\u7A0B\u5E8F\u542F\u52A8\u5230\u91C7\u6837\u65F6\u5E74\u8F7B\u4EE3\u4E2DGC\u7684\u6B21\u6570</p><p>YGCT:\u4ECE\u5E94\u7528\u7A0B\u5E8F\u542F\u52A8\u5230\u91C7\u6837\u65F6\u5E74\u8F7B\u4EE3\u4E2DGC\u6240\u4F7F\u7528\u7684\u65F6\u95F4\uFF08\u5355\u4F4D\uFF1AS\uFF09</p><p>FGC\uFF1A\u4ECE\u5E94\u7528\u7A0B\u5E8F\u542F\u52A8\u5230\u91C7\u6837\u65F6\u8001\u5E74\u4EE3\u4E2DGC\uFF08FULL GC\uFF09\u7684\u6B21\u6570</p><p>FGCT\uFF1A\u4ECE\u5E94\u7528\u7A0B\u5E8F\u542F\u52A8\u5230\u91C7\u6837\u65F6\u8001\u5E74\u4EE3\u4E2DGC\u6240\u4F7F\u7528\u7684\u65F6\u95F4\uFF08\u5355\u4F4D\uFF1AS\uFF09</p><p><strong>2\u3001jstat -gcutil PID 5000 20</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-c2a84c1d-e853-482a-88a5-27ef39da66a0.png" alt=""></p><p>s0:\u5E74\u8F7B\u4EE3\u4E2D\u7B2C\u4E00\u4E2Asurvivor\u5DF2\u4F7F\u7528\u7684\u5360\u5F53\u524D\u5BB9\u91CF\u767E\u5206\u6BD4</p><p>s1:\u5E74\u8F7B\u4EE3\u4E2D\u7B2C\u4E8C\u4E2Asurvivor\u5DF2\u4F7F\u7528\u7684\u5360\u5F53\u524D\u5BB9\u91CF\u767E\u5206\u6BD4</p><p>E:\u5E74\u8F7B\u4EE3\u4E2DEden\u5DF2\u4F7F\u7528\u7684\u5360\u5F53\u524D\u5BB9\u91CF\u767E\u5206\u6BD4</p><p>O:\u8001\u5E74\u4EE3\u4E2D\u5DF2\u4F7F\u7528\u7684\u5360\u5F53\u524D\u5BB9\u91CF\u767E\u5206\u6BD4</p><p>P:\u6C38\u4E45\u4EE3\u4E2D\u5DF2\u4F7F\u7528\u7684\u5360\u5F53\u524D\u5BB9\u91CF\u767E\u5206\u6BD4</p><h2 id="_5\u3001jhat" tabindex="-1"><a class="header-anchor" href="#_5\u3001jhat" aria-hidden="true">#</a> 5\u3001jhat</h2><p>\u4E3B\u8981\u7528\u6765\u89E3\u6790java\u5806dump\u5E76\u542F\u52A8\u4E00\u4E2Aweb\u670D\u52A1\u5668\uFF0C\u7136\u540E\u5C31\u53EF\u4EE5\u5728\u6D4F\u89C8\u5668\u4E2D\u67E5\u770B\u5806\u7684dump\u6587\u4EF6\u4E86\u3002</p><p>\u751F\u6210dump\u6587\u4EF6\u7684\u65B9\u6CD5\u524D\u9762\u5DF2\u7ECF\u4ECB\u7ECD\u4E86\uFF0C\u8FD9\u8FB9\u4E3B\u8981\u4ECB\u7ECD\u5982\u4F55\u89E3\u6790java\u5806\u8F6C\u50A8\u6587\u4EF6\uFF0C\u5E76\u542F\u52A8\u4E00\u4E2Aweb server</p><p><strong>jhat heapdump</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-fd76ac30-53a5-4549-8206-18283f330758.png" alt=""></p><p>\u8FD9\u4E2A\u547D\u4EE4\u5C06heapdump\u6587\u4EF6\u8F6C\u6362\u6210html\u683C\u5F0F\uFF0C\u5E76\u4E14\u542F\u52A8\u4E00\u4E2Ahttp\u670D\u52A1\uFF0C\u9ED8\u8BA4\u7AEF\u53E3\u4E3A7000\u3002</p><p>\u5982\u679C\u7AEF\u53E3\u51B2\u7A81\uFF0C\u53EF\u4EE5\u4F7F\u7528\u4EE5\u4E0B\u547D\u4EE4\u6307\u5B9A\u7AEF\u53E3\uFF1A<strong>jhat -port 4000 heapdump</strong></p><p>\u4E0B\u9762\u6211\u4EEC\u6765\u8BBF\u95EE\u4E0B\uFF1Aip\uFF1Aport</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-059e61f1-8263-4ee0-b36b-f117ecaf0a07.png" alt=""></p><h2 id="_6\u3001jinfo" tabindex="-1"><a class="header-anchor" href="#_6\u3001jinfo" aria-hidden="true">#</a> 6\u3001jinfo</h2><p>jinfo\u53EF\u4EE5\u7528\u6765\u67E5\u770B\u6B63\u5728\u8FD0\u884C\u7684java\u8FD0\u7528\u7A0B\u5E8F\u7684\u6269\u5C55\u53C2\u6570\uFF0C\u751A\u81F3\u652F\u6301\u5728\u8FD0\u884C\u65F6\u52A8\u6001\u5730\u66F4\u6539\u90E8\u5206\u53C2\u6570\u3002</p><p>\u57FA\u672C\u4F7F\u7528\u8BED\u6CD5\u5982\u4E0B\uFF1A\xA0<code>jinfo -&lt; option &gt; &lt; pid &gt;\xA0</code>\uFF0C\u5176\u4E2Doption\u53EF\u4EE5\u4E3A\u4EE5\u4E0B\u4FE1\u606F\uFF1A</p><p><code>-flag&lt; name &gt;</code>: \u6253\u5370\u6307\u5B9Ajava\u865A\u62DF\u673A\u7684\u53C2\u6570\u503C</p><p><code>-flag [+|-]&lt; name &gt;</code>\uFF1A\u8BBE\u7F6E\u6216\u53D6\u6D88\u6307\u5B9Ajava\u865A\u62DF\u673A\u53C2\u6570\u7684\u5E03\u5C14\u503C</p><p><code>-flag &lt; name &gt;=&lt; value &gt;</code>\uFF1A\u8BBE\u7F6E\u6307\u5B9Ajava\u865A\u62DF\u673A\u7684\u53C2\u6570\u7684\u503C</p><p>\u4F7F\u7528\u793A\u4F8B</p><p>\u4E0B\u9762\u7684\u547D\u4EE4\u663E\u793A\u4E86\u65B0\u751F\u4EE3\u5BF9\u8C61\u664B\u5347\u5230\u8001\u5E74\u4EE3\u5BF9\u8C61\u7684\u6700\u5927\u5E74\u9F84\u3002\u5728\u8FD0\u884C\u7A0B\u5E8F\u8FD0\u884C\u65F6\u5E76\u6CA1\u6709\u6307\u5B9A\u8FD9\u4E2A\u53C2\u6570\uFF0C\u4F46\u662F\u901A\u8FC7jinfo\uFF0C\u53EF\u4EE5\u67E5\u770B\u8FD9\u4E2A\u53C2\u6570\u7684\u5F53\u524D\u7684\u503C\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-f37517b7-20b4-4243-ae03-d41126ae43e5.png" alt=""></p><p>\u4E0B\u9762\u7684\u547D\u4EE4\u663E\u793A\u662F\u5426\u6253\u5370gc\u8BE6\u7EC6\u4FE1\u606F\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-86c5ace2-7377-4d5a-a780-0a194e14c9a0.png" alt=""></p><p>\u4E0B\u9762\u7684\u547D\u4EE4\u5728\u8FD0\u7528\u7A0B\u5E8F\u8FD0\u884C\u65F6\u52A8\u6001\u6253\u5F00\u6253\u5370\u8BE6\u7EC6gc\u4FE1\u606F\u5F00\u5173\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-d258d260-65eb-48f9-8585-6bed74de5a47.png" alt=""></p><p>\u6CE8\u610F\u4E8B\u9879\uFF1Ajinfo\u867D\u7136\u53EF\u4EE5\u5728java\u7A0B\u5E8F\u8FD0\u884C\u65F6\u52A8\u6001\u5730\u4FEE\u6539\u865A\u62DF\u673A\u53C2\u6570\uFF0C\u4F46\u5E76\u4E0D\u662F\u6240\u6709\u7684\u53C2\u6570\u90FD\u652F\u6301\u52A8\u6001\u4FEE\u6539\u3002</p><h2 id="_7\u3001jcmd" tabindex="-1"><a class="header-anchor" href="#_7\u3001jcmd" aria-hidden="true">#</a> 7\u3001jcmd</h2><p>\u5728JDK 1.7\u4E4B\u540E\uFF0C\u65B0\u589E\u4E86\u4E00\u4E2A\u547D\u4EE4\u884C\u5DE5\u5177jcmd\u3002\u5B83\u662F\u4E00\u4E2A\u591A\u529F\u80FD\u5DE5\u5177\uFF0C\u53EF\u4EE5\u7528\u6765\u5BFC\u51FA\u5806\uFF0C\u67E5\u770Bjava\u8FDB\u7A0B\uFF0C\u5BFC\u51FA\u7EBF\u7A0B\u4FE1\u606F\uFF0C\u6267\u884CGC\u7B49\u3002jcmd\u62E5\u6709jmap\u7684\u5927\u90E8\u5206\u529F\u80FD\uFF0COracle\u5B98\u65B9\u5EFA\u8BAE\u4F7F\u7528jcmd\u4EE3\u66FFjmap\u3002</p><p>\u4F7F\u7528\xA0jcmd -l\xA0\u547D\u4EE4\u5217\u51FA\u5F53\u524D\u8FD0\u884C\u7684\u6240\u6709\u865A\u62DF\u673A\uFF0C\u793A\u4F8B\uFF1A <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-4fa6915b-d39c-4d6d-a6e7-edc989cac76f.png" alt=""></p><p>\u9488\u5BF9\u6BCF\u4E00\u4E2A\u865A\u62DF\u673A\uFF0C\u53EF\u4EE5\u4F7F\u7528help\u547D\u4EE4\u5217\u51FA\u8BE5\u865A\u62DF\u673A\u652F\u6301\u7684\u6240\u6709\u547D\u4EE4\uFF0C\u793A\u4F8B\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-219b7cac-c9a9-4d47-8ecf-93a4a04fc1db.png" alt=""></p><p>\u5B50\u547D\u4EE4\u542B\u4E49\uFF1A</p><ul><li>VM.native_memory</li><li>VM.commercial_features</li><li>GC.rotate_log</li><li>ManagementAgent.stop</li><li>ManagementAgent.start_local</li><li>ManagementAgent.start</li><li>Thread.print\uFF0C \xA0 \xA0 \xA0 \xA0 \xA0 \xA0 \xA0 \xA0 \xA0 \xA0 \xA0 \xA0 \u6253\u5370\u7EBF\u7A0B\u6808\u4FE1\u606F</li><li>GC.class_histogram\uFF0C\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0 \u67E5\u770B\u7CFB\u7EDF\u4E2D\u7C7B\u7EDF\u8BA1\u4FE1\u606F</li><li>GC.heap_dump\uFF0C\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0 \u5BFC\u51FA\u5806\u4FE1\u606F\uFF0C\u4E0Ejmap -dump\u529F\u80FD\u4E00\u6837</li><li>GC.run_finalization\uFF0C\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0 \u89E6\u53D1finalize()</li><li>GC.run\uFF0C\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0 \u89E6\u53D1gc()</li><li>VM.uptime\uFF0C\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0 VM\u542F\u52A8\u65F6\u95F4</li><li>VM.flags\uFF0C\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0 \u83B7\u53D6JVM\u542F\u52A8\u53C2\u6570</li><li>VM.system_properties\uFF0C\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0 \u83B7\u53D6\u7CFB\u7EDFProperties</li><li>VM.command_line\uFF0C\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0\xA0 \u542F\u52A8\u65F6\u547D\u4EE4\u884C\u6307\u5B9A\u7684\u53C2\u6570</li><li>VM.version</li><li>help</li></ul><p>\u793A\u4F8B\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-b0742677-4ad0-4fd3-b985-054238af8865.png" alt=""></p><h2 id="_8\u3001\u53EF\u89C6\u5316\u76D1\u63A7\u5DE5\u5177-jconsole\u3001jvisualvm" tabindex="-1"><a class="header-anchor" href="#_8\u3001\u53EF\u89C6\u5316\u76D1\u63A7\u5DE5\u5177-jconsole\u3001jvisualvm" aria-hidden="true">#</a> 8\u3001\u53EF\u89C6\u5316\u76D1\u63A7\u5DE5\u5177\uFF08JConsole\u3001JVisualVM\uFF09</h2><h3 id="\u7B80\u4ECB" tabindex="-1"><a class="header-anchor" href="#\u7B80\u4ECB" aria-hidden="true">#</a> \u7B80\u4ECB</h3><p>\u5728 JDK \u5B89\u88C5\u76EE\u5F55\u7684 <code>bin</code> \u6587\u4EF6\u5939\u4E0B\uFF0C\u9664\u4E86\u63D0\u4F9B\u6709\u547D\u4EE4\u884C\u76D1\u63A7\u5DE5\u5177\u5916\uFF0C\u8FD8\u63D0\u4F9B\u4E86\u51E0\u79CD\u53EF\u89C6\u5316\u7684\u76D1\u63A7\u5DE5\u5177\uFF0C\u4EE5\u65B9\u4FBF\u7528\u6237\u76F4\u89C2\u5730\u4E86\u89E3\u865A\u62DF\u673A\u7684\u8FD0\u884C\u72B6\u6001\u3002\u5E38\u7528\u7684\u53EF\u89C6\u5316\u76D1\u63A7\u5DE5\u5177\u5982\u4E0B\uFF1A</p><h3 id="jconsole" tabindex="-1"><a class="header-anchor" href="#jconsole" aria-hidden="true">#</a> JConsole</h3><h4 id="\u7B80\u4ECB-1" tabindex="-1"><a class="header-anchor" href="#\u7B80\u4ECB-1" aria-hidden="true">#</a> \u7B80\u4ECB</h4><p>JConsole\uFF08Java Monitoring and Management Console\uFF09\u662F\u4E00\u6B3E\u57FA\u4E8E JMX\uFF08Java Manage-ment Extensions\uFF09\u7684\u53EF\u89C6\u5316\u76D1\u89C6\u5DE5\u5177\u3002\u5B83\u7684\u4E3B\u8981\u529F\u80FD\u662F\u901A\u8FC7 JMX \u7684 MBean\uFF08Managed Bean\uFF09\u5BF9\u7CFB\u7EDF\u4FE1\u606F\u8FDB\u884C\u6536\u96C6\u548C\u52A8\u6001\u8C03\u6574\u7CFB\u7EDF\u53C2\u6570\u3002JMX\uFF08Java Management Extensions\uFF09\u662F\u4E00\u4E2A\u4E3A\u5E94\u7528\u7A0B\u5E8F\u3001\u8BBE\u5907\u3001\u7CFB\u7EDF\u7B49\u690D\u5165\u7BA1\u7406\u529F\u80FD\u7684\u6846\u67B6\uFF0C\u901A\u5E38\u7528\u4E8E\u76D1\u63A7\u7CFB\u7EDF\u7684\u8FD0\u884C\u72B6\u6001\u6216\u7BA1\u7406\u7CFB\u7EDF\u7684\u90E8\u5206\u529F\u80FD\u3002</p><h4 id="\u4F7F\u7528" tabindex="-1"><a class="header-anchor" href="#\u4F7F\u7528" aria-hidden="true">#</a> \u4F7F\u7528</h4><p>\u6253\u5F00\u4F4D\u4E8E bin \u76EE\u5F55\u4E0B\u7684 <code>jconsole</code> \u7A0B\u5E8F\u540E\uFF0C\u5B83\u4F1A\u81EA\u52A8\u626B\u63CF\u5F53\u524D\u4E3B\u673A\u4E0A\u7684\u6240\u6709 JVM \u8FDB\u7A0B\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-6b614bd9-5e75-48e0-b51e-50cbd33669a5.png" alt=""></p><p>\u9009\u4E2D\u9700\u8981\u76D1\u63A7\u7684\u8FDB\u7A0B\u540E\uFF0C\u70B9\u51FB\u8FDE\u63A5\uFF0C\u5373\u53EF\u8FDB\u5165\u76D1\u63A7\u754C\u9762\u3002\u76D1\u63A7\u754C\u9762\u5305\u542B\u4E86 <em>\u6982\u89C8</em>\u3001<em>\u5185\u5B58</em>\u3001<em>\u7EBF\u7A0B</em>\u3001<em>\u7C7B</em>\u3001<em>VM \u6982\u8981</em>\u3001<em>MBean</em> \u516D\u4E2A\u9009\u9879\u5361\u3002\u5176\u4E2D\u6982\u89C8\u754C\u9762\u663E\u793A\u7684\u662F <em>\u5185\u5B58</em>\u3001<em>\u7EBF\u7A0B</em>\u3001<em>\u7C7B</em> \u7B49\u4E09\u4E2A\u9009\u9879\u5361\u754C\u9762\u7684\u6982\u89C8\u4FE1\u606F\uFF0C\u5982\u4E0B\u6240\u793A\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-10f3df05-e209-4bca-a8dc-99668a2d8e07.png" alt=""></p><p>\u800C\u5185\u5B58\u754C\u9762\u4E3B\u8981\u7528\u4E8E\u663E\u793A\u5806\u548C\u975E\u5806\u4E0A\u5404\u4E2A\u533A\u57DF\u7684\u4F7F\u7528\u91CF\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-ddabe66e-18ac-4cb6-9e9e-f446645a4501.png" alt=""></p><p>\u7EBF\u7A0B\u754C\u9762\u5185\u4E3B\u8981\u663E\u793A\u5404\u4E2A\u7EBF\u7A0B\u7684\u5806\u6808\u4FE1\u606F\uFF0C\u6700\u4E0B\u89D2\u6709\u4E00\u4E2A <strong>\u68C0\u6D4B\u6B7B\u9501</strong> \u6309\u94AE\uFF0C\u70B9\u51FB\u540E\u5982\u679C\u68C0\u6D4B\u5230\u6B7B\u9501\u5B58\u5728\uFF0C\u5219\u5728\u4E0B\u90E8\u7684\u7EBF\u7A0B\u9009\u9879\u5361\u65C1\u8FB9\u4F1A\u51FA\u73B0\u6B7B\u9501\u9009\u9879\u5361\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-a97902be-6084-4009-81b2-cbe08d60a617.png" alt=""></p><p>\u70B9\u51FB\u6B7B\u9501\u9009\u9879\u5361\u5219\u53EF\u4EE5\u770B\u5230\u9020\u6210\u6B7B\u9501\u7684\u7EBF\u7A0B\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-a76f6714-0efd-4208-a203-9264bc9963d9.png" alt=""></p><p>\u6700\u540E\u7684 <strong>\u7C7B</strong> \u9009\u9879\u5361\u4E3B\u8981\u7528\u4E8E\u663E\u793A\u5F53\u524D\u5DF2\u52A0\u8F7D\u548C\u5DF2\u5378\u8F7D\u7684\u7C7B\u7684\u6570\u91CF\u3002\u800C <strong>VM \u6982\u8981</strong> \u9009\u9879\u5361\u5219\u4E3B\u8981\u7528\u4E8E\u663E\u793A\u865A\u62DF\u673A\u7684\u76F8\u5173\u53C2\u6570\uFF0C\u5982\u4E0B\u6240\u793A\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-519acfd8-943e-4005-b1af-9de1e4187971.png" alt=""></p><h3 id="visualvm" tabindex="-1"><a class="header-anchor" href="#visualvm" aria-hidden="true">#</a> VisualVM</h3><h4 id="\u7B80\u4ECB-2" tabindex="-1"><a class="header-anchor" href="#\u7B80\u4ECB-2" aria-hidden="true">#</a> \u7B80\u4ECB</h4><p>VisualVM\uFF08All-in-One Java Troubleshooting Tool\uFF09\u662F Oracle \u63D0\u4F9B\u7684\u529F\u80FD\u6700\u5F3A\u5927\u7684\u8FD0\u884C\u76D1\u89C6\u548C\u6545\u969C\u5904\u7406\u7A0B\u5E8F\u4E4B\u4E00\uFF0C \u5B83\u9664\u4E86\u652F\u6301\u5E38\u89C4\u7684\u8FD0\u884C\u76D1\u89C6\u3001\u6545\u969C\u5904\u7406\u7B49\u529F\u80FD\u5916\uFF0C\u8FD8\u80FD\u7528\u4E8E\u6027\u80FD\u5206\u6790\uFF08Profiling\uFF09\u3002\u540C\u65F6\u56E0\u4E3A VisualVM \u662F\u57FA\u4E8E NetBeans \u5E73\u53F0\u7684\u5F00\u53D1\u5DE5\u5177\uFF0C\u6240\u4EE5\u5B83\u8FD8\u652F\u6301\u901A\u8FC7\u63D2\u4EF6\u6765\u8FDB\u884C\u529F\u80FD\u7684\u62D3\u5C55\u3002VisualVM \u7684\u4E3B\u8981\u529F\u80FD\u5982\u4E0B\uFF1A</p><ul><li>\u663E\u793A\u865A\u62DF\u673A\u8FDB\u7A0B\u53CA\u5176\u914D\u7F6E\u4FE1\u606F\u3001\u73AF\u5883\u4FE1\u606F\uFF08\u4E0E jps\u3001jinfo \u529F\u80FD\u7C7B\u4F3C\uFF09\uFF1B</li><li>\u76D1\u89C6\u5E94\u7528\u7A0B\u5E8F\u7684\u5904\u7406\u5668\u3001\u5783\u573E\u6536\u96C6\u3001\u5806\u3001\u65B9\u6CD5\u533A\u4EE5\u53CA\u7EBF\u7A0B\u7684\u4FE1\u606F\uFF08\u4E0E jstat\u3001jstack \u529F\u80FD\u7C7B\u4F3C\uFF09\uFF1B</li><li>dump\u4EE5\u53CA\u5206\u6790\u5806\u8F6C\u50A8\u5FEB\u7167\uFF08\u4E0E jmap\u3001jhat \u529F\u80FD\u7C7B\u4F3C\uFF09\uFF1B</li><li>\u65B9\u6CD5\u7EA7\u7684\u7A0B\u5E8F\u8FD0\u884C\u6027\u80FD\u5206\u6790\uFF0C\u627E\u51FA\u88AB\u8C03\u7528\u6700\u591A\u3001\u8FD0\u884C\u65F6\u95F4\u6700\u957F\u7684\u65B9\u6CD5\uFF1B</li><li>\u79BB\u7EBF\u7A0B\u5E8F\u5FEB\u7167\uFF1A\u53EF\u4EE5\u6536\u96C6\u7A0B\u5E8F\u7684\u8FD0\u884C\u65F6\u914D\u7F6E\u3001\u7EBF\u7A0B dump\u3001\u5185\u5B58 dump \u7B49\u4FE1\u606F\u6765\u5EFA\u7ACB\u5FEB\u7167\u3002</li></ul><h4 id="\u4F7F\u7528-1" tabindex="-1"><a class="header-anchor" href="#\u4F7F\u7528-1" aria-hidden="true">#</a> \u4F7F\u7528</h4><p>\u6253\u5F00\u4F4D\u4E8E bin \u76EE\u5F55\u4E0B\u7684 <code>jvisualvm</code> \u7A0B\u5E8F\uFF0C \u5B83\u4F1A\u81EA\u52A8\u626B\u63CF\u5F53\u524D\u4E3B\u673A\u4E0A\u7684\u6240\u6709 JVM \u8FDB\u7A0B\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-221c1e6e-bcfd-4bf3-be85-6172a3f72962.png" alt=""></p><p>\u70B9\u51FB\u9700\u8981\u76D1\u63A7\u7684\u8FDB\u7A0B\u540E\uFF0C\u53F3\u4FA7\u5373\u4F1A\u663E\u793A\u76F8\u5173\u7684\u76D1\u63A7\u4FE1\u606F\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-0e0a833a-d13c-4b70-b7ee-c58651a58185.png" alt=""></p><p><strong>1. \u5806 Dump</strong></p><p>\u5728\u76D1\u63A7\u754C\u9762\u70B9\u51FB\u6309\u94AE\u53EF\u4EE5 <strong>\u6267\u884C\u5783\u573E\u56DE\u6536</strong> \u6216\u8005 <strong>\u5806 Dump</strong> \u3002\u8FDB\u884C\u5806 Dump \u540E\uFF0C\u8FD8\u4F1A\u663E\u793A\u5176\u5206\u6790\u7ED3\u679C\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-afaf433c-6ae7-4c4b-b686-48504cd4c3e9.png" alt=""></p><p><strong>2. \u7EBF\u7A0B Dump</strong></p><p>\u5728\u7EBF\u7A0B\u754C\u9762\u53EF\u4EE5\u67E5\u770B\u6240\u6709\u7EBF\u7A0B\u7684\u72B6\u6001\uFF0C\u5982\u679C\u51FA\u73B0\u6B7B\u9501\uFF0C\u8BE5\u754C\u9762\u8FD8\u4F1A\u8FDB\u884C\u63D0\u793A\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-9dbc6b53-c9e6-4051-845f-ef2d848b5d60.png" alt=""></p><p>\u6B64\u65F6\u53EF\u4EE5\u8FDB\u884C <strong>\u7EBF\u7A0B Dump</strong> \u6765\u83B7\u53D6\u5177\u4F53\u7684\u7EBF\u7A0B\u4FE1\u606F\uFF0C\u6548\u679C\u548C jstack \u547D\u4EE4\u7C7B\u4F3C\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-74941c88-d009-4d7f-8264-efc7d94c94ee.png" alt=""></p><p><strong>3. \u6027\u80FD\u5206\u6790</strong></p><p>\u5728 Profiler \u754C\u9762\uFF0C\u53EF\u4EE5\u8FDB\u884C CPU \u548C \u5185\u5B58\u7684\u6027\u80FD\u5206\u6790\u3002\u8981\u5F00\u59CB\u6027\u80FD\u5206\u6790\uFF0C\u9700\u8981\u5148\u9009\u62E9 <strong>CPU</strong> \u6216 <strong>\u5185\u5B58</strong> \u6309\u94AE\u4E2D\u7684\u4E00\u4E2A\uFF0CVisualVM \u5C06\u4F1A\u5F00\u59CB\u8BB0\u5F55\u5E94\u7528\u7A0B\u5E8F\u6267\u884C\u8FC7\u7684\u6240\u6709\u65B9\u6CD5\uFF1A\u5982\u679C\u662F\u8FDB\u884C\u7684\u662F CPU \u6267\u884C\u65F6\u95F4\u5206\u6790\uFF0C\u5C06\u4F1A\u7EDF\u8BA1\u6BCF\u4E2A\u65B9\u6CD5\u7684\u6267\u884C\u6B21\u6570\u3001\u6267\u884C\u8017\u65F6\uFF1B\u5982\u679C\u662F\u5185\u5B58\u5206\u6790\uFF0C\u5219\u4F1A\u7EDF\u8BA1\u6BCF\u4E2A\u65B9\u6CD5\u5173\u8054\u7684\u5BF9\u8C61\u6570\u4EE5\u53CA\u8FD9\u4E9B\u5BF9\u8C61\u6240\u5360\u7684\u7A7A\u95F4\u3002\u60F3\u8981\u7ED3\u675F\u6027\u80FD\u5206\u6790\uFF0C\u70B9\u51FB\u505C\u6B62\u6309\u94AE\u5373\u53EF\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-946d7f3e-9519-4a0b-8905-0bf2c1d83fcb.png" alt=""></p><p><strong>4. Visual GC</strong></p><p>Visual GC \u9762\u677F\u9ED8\u8BA4\u662F\u4E0D\u663E\u793A\u7684\uFF0C\u9700\u8981\u901A\u8FC7\u63D2\u4EF6\u8FDB\u884C\u6269\u5C55\u3002\u5B83\u4F1A\u5B9E\u65F6\u76D1\u63A7\u865A\u62DF\u673A\u7684\u72B6\u6001\uFF0C\u5728\u529F\u80FD\u4E0A\u7C7B\u4F3C\u4E8E jstat \u547D\u4EE4\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-b6f23234-8b1d-44df-8b12-e723dc0d1903.png" alt=""></p><h4 id="\u5B89\u88C5\u63D2\u4EF6" tabindex="-1"><a class="header-anchor" href="#\u5B89\u88C5\u63D2\u4EF6" aria-hidden="true">#</a> \u5B89\u88C5\u63D2\u4EF6</h4><p>\u5728\u4E3B\u754C\u9762\uFF0C\u70B9\u51FB <strong>\u5DE5\u5177 =&gt; \u63D2\u4EF6</strong> \uFF0C\u53EF\u4EE5\u6253\u5F00\u63D2\u4EF6\u9762\u677F\u3002\u53F3\u51FB\u63D2\u4EF6\u9009\u9879\u6216\u8005\u70B9\u51FB\u5B89\u88C5\u6309\u94AE\u5373\u53EF\u5B8C\u6210\u5BF9\u5E94\u63D2\u4EF6\u7684\u5B89\u88C5\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-4518bc2f-ef1f-4ed6-8da9-47a0fdc03338.png" alt=""></p><p>\u9700\u8981\u6CE8\u610F\u7684\u662F\uFF0C\u5B89\u88C5\u63D2\u4EF6\u524D\u9700\u8981\u6309\u7167\u81EA\u5DF1 JVM \u7684\u7248\u672C\u6765\u914D\u7F6E\u63D2\u4EF6\u4E2D\u5FC3\uFF0C\u5426\u5219\u4F1A\u629B\u51FA \u201D\u65E0\u6CD5\u8FDE\u63A5\u5230\u63D2\u4EF6\u4E2D\u5FC3\u201C \u7684\u5F02\u5E38\u3002\u6BCF\u4E2A\u7248\u672C\u5BF9\u5E94\u7684\u63D2\u4EF6\u4E2D\u5FC3\u53EF\u4EE5\u5728\u8BE5\u7F51\u5740\u4E0A\u67E5\u770B\uFF1Ahttps://visualvm.github.io/pluginscenters.html\uFF0C\u754C\u9762\u5982\u4E0B\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-146f715c-a902-4725-9101-07d608a04770.png" alt=""></p><p>\u4E4B\u540E\u9700\u8981\u5C06\u6B63\u786E\u7684\u63D2\u4EF6\u4E2D\u5FC3\u7684\u5730\u5740\u914D\u7F6E\u5230\u7A0B\u5E8F\u4E2D\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-55919d48-88f4-4ee5-842f-3ed20b9f7cd6.png" alt=""></p><h3 id="\u8FDE\u63A5\u8FDC\u7A0B\u8FDB\u7A0B" tabindex="-1"><a class="header-anchor" href="#\u8FDE\u63A5\u8FDC\u7A0B\u8FDB\u7A0B" aria-hidden="true">#</a> \u8FDE\u63A5\u8FDC\u7A0B\u8FDB\u7A0B</h3><p>\u4EE5\u4E0A\u6F14\u793A JConsole \u548C VisualVM \u65F6\uFF0C\u6211\u4EEC\u90FD\u662F\u7528\u7684\u672C\u5730\u8FDB\u7A0B\uFF0C\u4F46\u5728\u5B9E\u9645\u5F00\u53D1\u4E2D\uFF0C\u6211\u4EEC\u66F4\u591A\u9700\u8981\u76D1\u63A7\u7684\u662F\u670D\u52A1\u5668\u4E0A\u7684\u8FDC\u7A0B\u8FDB\u7A0B\u3002\u60F3\u8981\u76D1\u63A7\u8FDC\u7A0B\u4E3B\u673A\u4E0A\u7684\u8FDB\u7A0B\uFF0C\u9700\u8981\u8FDB\u884C JMX \u7684\u76F8\u5173\u914D\u7F6E\uFF0C\u6839\u636E\u8FDE\u63A5\u65F6\u662F\u5426\u9700\u8981\u7528\u6237\u540D\u548C\u5BC6\u7801\uFF0C\u53EF\u4EE5\u5206\u4E3A\u4EE5\u4E0B\u4E24\u79CD\u914D\u7F6E\u65B9\u5F0F\uFF1A</p><h4 id="\u4E0D\u4F7F\u7528\u5B89\u5168\u51ED\u8BC1" tabindex="-1"><a class="header-anchor" href="#\u4E0D\u4F7F\u7528\u5B89\u5168\u51ED\u8BC1" aria-hidden="true">#</a> \u4E0D\u4F7F\u7528\u5B89\u5168\u51ED\u8BC1</h4><p>\u542F\u52A8\u670D\u52A1\u5668\u4E0A\u7684 Java \u8FDB\u7A0B\u65F6\u589E\u52A0\u4EE5\u4E0B\u53C2\u6570\uFF1A</p><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code> java -Dcom.sun.management.jmxremote.port<span class="token operator">=</span><span class="token number">12345</span>  <span class="token comment">#jmx\u8FDC\u7A0B\u8FDE\u63A5\u7684\u7AEF\u53E3\u53F7</span>
  -Dcom.sun.management.jmxremote.ssl<span class="token operator">=</span>false 
diff --git a/dist/assets/progit.html.66c47307.js b/dist/assets/progit.html.284a6498.js
similarity index 98%
rename from dist/assets/progit.html.66c47307.js
rename to dist/assets/progit.html.284a6498.js
index 00d5854e..ab46dcb8 100644
--- a/dist/assets/progit.html.66c47307.js
+++ b/dist/assets/progit.html.284a6498.js
@@ -1 +1 @@
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diff --git a/dist/assets/progit.html.3b6ba984.js b/dist/assets/progit.html.3b6ba984.js
deleted file mode 100644
index b0049f95..00000000
--- a/dist/assets/progit.html.3b6ba984.js
+++ /dev/null
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diff --git a/dist/assets/progit.html.de3011f5.js b/dist/assets/progit.html.95158ac7.js
similarity index 98%
rename from dist/assets/progit.html.de3011f5.js
rename to dist/assets/progit.html.95158ac7.js
index 7607ff46..c6a0397e 100644
--- a/dist/assets/progit.html.de3011f5.js
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new file mode 100644
index 00000000..843ab395
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diff --git a/dist/assets/qianduan.html.60a6bdee.js b/dist/assets/qianduan.html.ef57d5d5.js
similarity index 99%
rename from dist/assets/qianduan.html.60a6bdee.js
rename to dist/assets/qianduan.html.ef57d5d5.js
index 5a943673..e02a91e2 100644
--- a/dist/assets/qianduan.html.60a6bdee.js
+++ b/dist/assets/qianduan.html.ef57d5d5.js
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alt=""></p><p>\u6211\u4E4B\u524D\u603B\u89C9\u5F97\u6D77\u4FE1\u548C\u6D77\u5C14\u6709\u67D0\u79CD\u8054\u7CFB\uFF0C\u4E0D\u8FC7\u6211\u67E5\u4E86\u4E0B\u5E76\u6CA1\u6709\uFF0C\u8DEF\u8FC7\u6D77\u4FE1\u7684\u56ED\u533A\u65F6\u89C9\u5F97\u6D77\u4FE1\u4E5F\u4FEE\u7684\u633A\u6F02\u4EAE\u7684\u3002\u4E00\u4E2A 211 \u7855\u58EB\u7206\u6599\u7684\u85AA\u8D44\u662F\u6BCF\u6708 10k\uFF0C\u7136\u540E\u4E00\u5E74 13 \u4E2A\u6708\u5DE5\u8D44\u3002\u798F\u5229\u5F85\u9047\u65B9\u9762\u611F\u89C9\u8FD8\u53EF\u4EE5\uFF0C\u524D\u4E24\u5E74\u6709\u514D\u8D39\u5BBF\u820D\uFF0C\u4EA4\u901A\u8865\u8D34\u6BCF\u6708 200\uFF0C\u4F4F\u623F\u8865\u8D34 800 \u6BCF\u6708\uFF0C\u53EF\u4EE5\u9886\u4E09\u5E74\u3002\u8BD5\u7528\u671F 6 \u4E2A\u6708\uFF0C\u8BD5\u7528\u671F\u95F4 90% \u85AA\u8D44\uFF0C\u514D\u8D39\u73ED\u8F66\uFF0C\u516C\u79EF\u91D1 10%\uFF0C\u793E\u4FDD\u5168\u989D\u3002\u5DE5\u4F5C\u65E99\u665A6\uFF0C\u4E2D\u5348\u4F11\u606F\u4E00\u5C0F\u65F6\u3002</p><p>\u53E6\u5916\u5C31\u662F\u5982\u679C\u8FD8\u662F\u559C\u6B22\u4E92\u8054\u7F51\u6C1B\u56F4\u7684\u8BDD\u53BB\u6D77\u4FE1\u805A\u597D\u770B\u6BD4\u8F83\u597D\uFF0C\u5C31\u662F\u6D77\u4FE1\u7535\u89C6\u4E0A\u90A3\u4E2A APP \uFF0C\u542C\u8BF4\u6280\u672F\u8FD8\u4E0D\u9519\uFF0C\u7ED9\u7684\u5DE5\u8D44\u4E5F\u76F8\u5BF9\u8F83\u9AD8\u3002\u4E0D\u8FC7\u52A0\u73ED\u591A\u554A\u3002</p><h3 id="\u5149\u5927\u94F6\u884C\u9752\u5C9B\u7814\u53D1\u4E2D\u5FC3" tabindex="-1"><a class="header-anchor" href="#\u5149\u5927\u94F6\u884C\u9752\u5C9B\u7814\u53D1\u4E2D\u5FC3" aria-hidden="true">#</a> \u5149\u5927\u94F6\u884C\u9752\u5C9B\u7814\u53D1\u4E2D\u5FC3</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/qingdao-7351e8f8-90d5-4f3c-998a-703b36ec1fca.png" alt=""></p><p>\u5F85\u9047\u542C\u8BF4\u8FD8\u4E0D\u9519\uFF0C\u4EE5\u524D\u662F\u5F52\u5206\u884C\u7BA1\uFF0C\u73B0\u5728\u5F52\u603B\u884C\u7BA1\u3002\u9752\u5C9B\u8FD9\u8FB9\u4E3B\u8981\u5F00\u53D1\u4E91\u7F34\u8D39\u4E1A\u52A1\u3002\u636E\u8BF4\u662F\u6709\u672B\u5C3E\u6DD8\u6C70\u673A\u5236\u3002\u8FD1\u51E0\u5E74\u597D\u591A\u5458\u5DE5\u90FD\u8DD1\u5230\u9752\u5C9B\u94F6\u884C\u4E86\u3002</p><h3 id="\u9752\u5C9B\u94F6\u884C" tabindex="-1"><a class="header-anchor" href="#\u9752\u5C9B\u94F6\u884C" aria-hidden="true">#</a> \u9752\u5C9B\u94F6\u884C</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/qingdao-cc5091a0-28ad-4439-8718-a6b79e80ef83.png" alt=""></p><p>\u9752\u5C9B\u94F6\u884C\u603B\u884C\u7684\u6280\u672F\u5C97\u3002\u85AA\u8D44\u4E0D\u7B97\u9AD8\uFF0C\u6709\u85AA\u8D44\u7206\u6599\u662F\u5E74\u85AA12w\uFF0C\u4E0D\u8FC7\u7B97\u662F\u6478\u9C7C\u7684\u5929\u5802\u4E86\uFF0C\u6D3B\u5927\u90E8\u5206\u662F\u5916\u5305\u5E72\u3002</p><h3 id="\u9752\u5C9B\u51EF\u4E9A" tabindex="-1"><a class="header-anchor" href="#\u9752\u5C9B\u51EF\u4E9A" aria-hidden="true">#</a> \u9752\u5C9B\u51EF\u4E9A</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/qingdao-9fcaebb9-fcf0-4b34-8302-c0be931ae1ce.png" alt=""></p><p>\u5728\u9752\u5C9B\u8F6F\u4EF6\u4F01\u4E1A\u80FD\u7B97\u4E2D\u4E0A\u6E38\u4E86\uFF0C\u4E0D\u8FC7\u5168\u9760\u540C\u884C\u886C\u6258\u3002\u52A0\u4E0A\u5404\u79CD\u8865\u8D34\uFF0C\u4E00\u5E74\u7684\u5DE5\u8D44\u5DEE\u4E0D\u591A\u662F\u662F\u5341\u4E8C\u4E09\u4E07\u5427\u3002\u8BD5\u7528\u671F\u5DE5\u8D44\u6253\u4E94\u516D\u6298\u3002\u6280\u672F\u8FD8\u53EF\u4EE5\uFF0C\u4E0D\u8FC7\u6709\u4EBA\u7206\u6599\u8BF4\u4ED6\u52A0\u73ED\u8FD8\u633A\u591A\u7684\u3002</p><h3 id="\u9752\u5C9B\u9F0E\u4FE1" tabindex="-1"><a class="header-anchor" href="#\u9752\u5C9B\u9F0E\u4FE1" aria-hidden="true">#</a> \u9752\u5C9B\u9F0E\u4FE1</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/qingdao-f941c172-1ff2-40ce-bea0-8cb52a030bf3.png" alt=""></p><p>\u4E3B\u8981\u505A\u901A\u4FE1\u7684\u516C\u53F8\uFF0C\u4E00\u4E2A\u5E94\u5C4A\u7855\u58EB\u7684\u7206\u6599\u662F\u7A0E\u524D13k\uFF0C\u6BCF\u5E7413\u4E2A\u6708\u7684\u5DE5\u8D44\uFF0C\u6709\u98DF\u5802\uFF0C\u6BCF\u4E2A\u6708600\u7684\u996D\u8865\u3002</p><h3 id="yeelight" tabindex="-1"><a class="header-anchor" href="#yeelight" aria-hidden="true">#</a> Yeelight</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/qingdao-7f88980b-d21e-4b27-9306-f911eb8a02e6.png" alt=""></p><p>Yeelight \u7B97\u662F\u5728\u9752\u5C9B\u4E3A\u6570\u4E0D\u591A\u7684\u5C0F\u800C\u7F8E\u7684\u516C\u53F8\u4E86\uFF0C\u76EE\u524D\u56E2\u961F330\u4EBA\uFF0C\u7814\u53D1\u4EBA\u5458\u8D85\u8FC7\u4E00\u534A\uFF0C\u4E3B\u8981\u505A\u667A\u80FD\u7167\u660E\uFF0C\u6709\u5C0F\u7C73\u7684\u6295\u8D44\u3002\u542C\u8BF4\u56E2\u961F\u6C1B\u56F4\u8FD8\u4E0D\u9519\uFF0C\u6BD4\u8F83\u91CD\u89C6\u6280\u672F\u3002\u6211\u5728\u7F51\u4E0A\u6CA1\u627E\u5230\u6821\u62DB\u5F85\u9047\u7684\u4ECB\u7ECD\uFF0C\u793E\u62DB\u7684\u8BDD BOSS \u62DB\u8058 3-5\u5E74 Java \u7ECF\u9A8C\u7684\u62A5\u4EF7\u662F 12k-24k\u3002</p><h3 id="\u4E2D\u8F66\u56DB\u65B9" tabindex="-1"><a class="header-anchor" href="#\u4E2D\u8F66\u56DB\u65B9" aria-hidden="true">#</a> \u4E2D\u8F66\u56DB\u65B9</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/qingdao-f75fc5b3-2587-42d5-a80f-592a49c515eb.png" alt=""></p><p>\u4E2D\u8F66\u56DB\u65B9\u662F\u56FD\u6709\u63A7\u80A1\u516C\u53F8\uFF0C\u85AA\u8D44\u5F85\u9047\u5728\u9752\u5C9B\u7B97\u4E2D\u4E0A\u3002\u4E5F\u62DB\u7A0B\u5E8F\u5458\u3002\u5E94\u5C4A\u6BD5\u4E1A\u751F\u662F6\u4E2A\u6708\u8BD5\u7528\u671F\uFF0C\u8F6C\u6B63\u4EE5\u540E\u6BCF\u5E74\u5DE5\u8D44\u7A0E\u524D\u5DEE\u4E0D\u591A15w\u5DE6\u53F3\u3002\u4E0D\u8FC7\u4ED6\u8FD9\u4E2A\u5DE5\u8D44\u6784\u6210\u548C\u522B\u4EBA\u4E0D\u4E00\u6837\u5440\u3002\u6BCF\u6708\u7A0E\u524D\u4E00\u4E07\u5DE6\u53F3\u7684\u5DE5\u8D44\u597D\u50CF\u5176\u4E2D\u516D\u5343\u5DE6\u53F3\u662F\u7EE9\u6548\uFF0C\u7136\u540E\u6BCF\u5E74\u5E74\u4E2D\u4F1A\u53D1\u4E00\u4E2A\u4E1A\u7EE9\u5956\u91D1\uFF0C\u4E0D\u540C\u90E8\u95E8\u7684\u5956\u91D1\u5DEE\u522B\u5F88\u5927\u3002</p><h3 id="\u4E2D\u753541\u6240" tabindex="-1"><a class="header-anchor" href="#\u4E2D\u753541\u6240" aria-hidden="true">#</a> \u4E2D\u753541\u6240</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/qingdao-53f614bb-d10d-4ae2-9f83-5911ef8ddead.png" alt=""></p><p>\u8BF4\u5B9E\u8BDD\uFF0C\u6211\u4E00\u76F4\u5BF9\u4E2D\u7535\u7CFB\u5217\u7684\u7814\u7A76\u6240\u5370\u8C61\u4E0D\u662F\u5F88\u597D\uFF0C\u4E0D\u8FC7\u542C\u8BF4\u4E2D\u753528\u6240\u7684\u85AA\u8D44\u540E\u5BF9\u4E2D\u7535\u7CFB\u5217\u7684\u5370\u8C61\u6709\u6240\u6539\u89C2\uFF08\u8FD9\u91CC\u662F\u95F2\u626F\u4E00\u53E5\u54C8\uFF0C\u4E2D\u753528\u6240\u5728\u5357\u4EAC\uFF0C\u548C\u9752\u5C9B\u6CA1\u5565\u5173\u7CFB\uFF09\u3002\u6CE8\u610F41\u6240\u5F97\u603B\u90E8\u662F\u5728\u5B89\u5FBD\uFF0C\u9752\u5C9B\u53EA\u662F\u4E00\u4E2A\u5206\u90E8\uFF0C\u6211\u4E86\u89E3\u5230\u662F\u52A0\u73ED\u4F1A\u6BD4\u8F83\u4E25\u91CD\u3002</p><p>\u597D\u561B\uFF0C\u597D\u4E0D\u5BB9\u6613\u51D1\u51FA\u6765\u8FD9\u51E0\u4E2A\u7A0B\u5E8F\u5458\u7684\u5DE5\u4F5C\u673A\u4F1A\uFF0C\u5927\u5BB6\u8981\u662F\u8FD8\u77E5\u9053\u4E00\u4E9B\u6BD4\u8F83\u597D\u7684\u5DE5\u4F5C\u673A\u4F1A\uFF0C\u6B22\u8FCE\u6765\u8865\u5145\u5440\u3002</p><h2 id="\u751F\u6D3B" tabindex="-1"><a class="header-anchor" href="#\u751F\u6D3B" aria-hidden="true">#</a> \u751F\u6D3B</h2><h3 id="\u623F\u4EF7" tabindex="-1"><a class="header-anchor" href="#\u623F\u4EF7" aria-hidden="true">#</a> \u623F\u4EF7</h3><p>\u9752\u5C9B\u623F\u5747\u4EF7\u4E24\u4E07\u591A\u4E86\u5427\u3002\u5D02\u5C71\u548C\u5E02\u5357\u6BD4\u8F83\u8D35\uFF0C\u5176\u5B83\u5730\u76F8\u5BF9\u597D\u4E00\u4E9B\u3002\u4E0B\u9762\u8FD9\u5F20\u56FE\u6709\u5404\u533A\u7684\u623F\u4EF7\uFF0C\u4E0D\u662F\u592A\u51C6\uFF0C\u4E0D\u8FC7\u53EF\u4EE5\u53C2\u8003\u4E0B\u5440\u3002\u611F\u89C9\u7A0B\u5E8F\u5458\u5728\u5317\u4EAC\u5E72\u51E0\u5E74\uFF0C\u6512\u4E2A\u9996\u4ED8\uFF0C\u7136\u540E\u56DE\u9752\u5C9B\u627E\u4E2A\u76F8\u5BF9\u7A33\u5B9A\u7684\u516C\u53F8\u4E0A\u73ED\uFF0C\u4E70\u623F\u538B\u529B\u8FD8\u4E0D\u662F\u5F88\u5927\uFF08\u9664\u4E86\u4E70\u5D02\u5C71\u548C\u5E02\u5357\u554A\uFF09\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/qingdao-a228e29e-363f-44a3-b8cc-6cdd18d34b9f.png" alt=""></p><h3 id="\u6559\u80B2" tabindex="-1"><a class="header-anchor" href="#\u6559\u80B2" aria-hidden="true">#</a> \u6559\u80B2</h3><p>\u611F\u89C9\u9752\u5C9B\u7684\u6559\u80B2\u65B9\u9762\u5F88\u4E0D\u9519\u3002</p><p>\u5927\u5B66\u65B9\u9762\uFF0C\u5C71\u4E1C\u5927\u5B66\u5728\u9752\u5C9B\u662F\u6709\u6821\u533A\u7684\uFF0C\u867D\u7136\u79BB\u5E02\u533A\u662F\u771F\u7684\u8FDC\uFF0C\u4F46\u662F\u4EBA\u5BB6\u6709\u5730\u94C1\u5440\u3002\u6211\u8BB0\u5F97\u5750\u90A3\u8D9F\u5730\u94C1\u53BB\u5C71\u4E1C\u5927\u5B66\u9752\u5C9B\u6821\u533A\u627E\u6211\u820D\u53CB\u65F6\u7A7F\u8D8A\u5D02\u5C71\uFF0C\u7A97\u5916\u7684\u98CE\u666F\u662F\u771F\u7684\u6F02\u4EAE\u3002\u4E2D\u56FD\u6D77\u6D0B\u5927\u5B66\u4E5F\u662F\u4E00\u6240985\uFF0C\u6821\u533A\u662F\u771F\u7684\u6F02\u4EAE\u3002\u4E2D\u56FD\u77F3\u6CB9\u5927\u5B66\u662F\u4E00\u6240211\uFF0C\u4E5F\u633A\u4E0D\u9519\u7684\u3002\u53E6\u5916\u50CF\u9752\u5C9B\u5927\u5B66\u3001\u9752\u5C9B\u7406\u5DE5\u5927\u5B66\u3001\u5C71\u4E1C\u79D1\u6280\u5927\u5B66\u8FD9\u4E9B\u9662\u6821\u4E5F\u662F\u4E0D\u9519\u7684\u3002\u8FD9\u51E0\u5E74\u5404\u4E2A\u9AD8\u6821\u4E5F\u5728\u9752\u5C9B\u4FEE\u5EFA\u4E86\u7814\u7A76\u9662\uFF0C\u611F\u89C9\u8FD8\u662F\u633A\u6709\u53D1\u5C55\u524D\u666F\u7684\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/qingdao-b37788d7-c33d-475a-bc69-05927bf0825d.png" alt=""></p><p>\u9AD8\u4E2D\u65B9\u9762\uFF0C\u9752\u5C9B\u4E8C\u4E2D\u3001\u9752\u5C9B\u4E00\u4E2D\u3001\u9752\u5C9B\u4E94\u5341\u516B\u4E2D\u3001\u9752\u5C9B\u4E5D\u4E2D\u3001\u5373\u58A8\u4E00\u4E2D\u7B49\u90FD\u975E\u5E38\u597D\u3002\u4E0D\u8FC7\u5C71\u4E1C\u9AD8\u8003\u7684\u538B\u529B\u662F\u771F\u7684\u5927\uFF0C\u611F\u89C9\u6211\u5927\u5B66\u548C\u8BFB\u7814\u65F6\u8EAB\u8FB9\u7684\u5C71\u4E1C\u540C\u5B66\uFF0C\u5F53\u5E74\u9AD8\u8003\u90FD\u662F\u82F1\u96C4\u822C\u7684\u4EBA\u7269\u3002</p><h3 id="\u98CE\u666F-\u7F8E\u98DF" tabindex="-1"><a class="header-anchor" href="#\u98CE\u666F-\u7F8E\u98DF" aria-hidden="true">#</a> \u98CE\u666F&amp;\u7F8E\u98DF</h3><p>\u9752\u5C9B\u662F\u771F\u7684\u633A\u7F8E\u7684\uFF0C\u611F\u89C9\u5728\u9752\u5C9B\u65E2\u80FD\u611F\u89C9\u5230\u73B0\u4EE3\u5316\u5927\u90FD\u5E02\u7684\u611F\u89C9\u3001\u53C8\u80FD\u4F53\u9A8C\u5230\u6C11\u56FD\u98CE\u60C5\u8FD8\u80FD\u4F53\u9A8C\u5230\u6B27\u5F0F\u98CE\u60C5\u3002\u53E6\u5916\u6211\u540C\u5B66\u5E26\u6211\u5728\u9752\u5C9B\u8F6C\u65F6\uFF0C\u7ECF\u5E38\u8D70\u7740\u8D70\u7740\u5C31\u89C1\u5230\u4E86\u5927\u6D77\uFF0C\u8FD9\u8BA9\u6211\u8FD9\u4E2A\u591A\u5E74\u8EAB\u5C45\u5185\u9646\uFF0C\u6CA1\u89C1\u8FC7\u6D77\u7684\u5C11\u5E74\u6765\u8BF4\u8FD8\u662F\u633A\u6B23\u559C\u7684\u3002\u611F\u89C9\u9752\u5C9B\u6BD4\u897F\u5B89\u51B7\u5F88\u591A\uFF0C\u4ECA\u5E744\u6708\u897F\u5B89\u5DF2\u7ECF\u5F88\u70ED\u4E86\uFF0C\u82B1\u90FD\u5F00\u4E86\uFF0C\u4F46\u662F\u53BB\u4E86\u9752\u5C9B\u4EE5\u540E\u53D1\u73B0\u67F3\u6811\u624D\u521A\u6709\u4E00\u70B9\u70B9\u7EFF\uFF0C\u8FD8\u633A\u51C9\u5FEB\u7684\u3002</p><p><img 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new file mode 100644
index 00000000..81be276a
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new file mode 100644
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id="\u6D77\u5C14" tabindex="-1"><a class="header-anchor" href="#\u6D77\u5C14" aria-hidden="true">#</a> \u6D77\u5C14</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/qingdao-e656449e-a34f-4915-a1cb-459208d23e34.png" alt=""></p><p>\u6D77\u5C14\u5728\u9752\u5C9B\u591A\u5E74\u4E86\uFF0C\u66FE\u7ECF\u6709\u6BB5\u8F89\u714C\u671F\u7684\u3002\u6211\u820D\u53CB\u5E26\u7740\u6211\u5728\u5C71\u4E1C\u54C8\u9152\u65F6\uFF0C\u4E00\u4E2A\u8001\u5927\u54E5\u5728\u9152\u684C\u4E0A\u5C31\u8DDF\u6211\u4EEC\u804A\u8D77\u6765\uFF0C\u8BF4\u4ED6\u5F53\u521D\u5728\u6D77\u5C14\u4E70\u5BB6\u90FD\u662F\u8981\u8BF7\u4ED6\u4EEC\u5403\u996D\u624D\u5356\u7ED9\u4EA7\u54C1\u7684\u3002\u4E0D\u8FC7\u8FD1\u4E9B\u5E74\u6D77\u5C14\u5C31\u4E0D\u592A\u884C\u4E86\uFF0C\u4F46\u4F9D\u7136\u5728\u9752\u5C9B\u662F\u4E2A\u5DE5\u4F5C\u4E0A\u7684\u597D\u9009\u62E9\u3002\u6D77\u5C14 Java \u5C97\u4F4D\u7ED9\u5E94\u5C4A 985 \u7855\u58EB\u7684\u62A5\u4EF7\u662F\u5E74\u85AA 14 \u4E07\u3002\u672C\u79D1\u751F\u76F8\u5BF9\u5C11\u4E00\u70B9\uFF0C\u5E74\u85AA\u5927\u6982\u5728 8\u4E07 \u5230 12\u4E07 \u5DE6\u53F3\u3002\u6211\u8DEF\u8FC7\u6D77\u5C14\u65F6\u611F\u89C9\u6D77\u5C14\u7684\u56ED\u533A\u8FD8\u4FEE\u7684\u633A\u6F02\u4EAE\u7684\u3002\u53E6\u5916\u8BF4\u4E00\u53E5\uFF0C\u611F\u89C9\u6D77\u5C14\u5361\u5965\u65AF\u8FD8\u884C\uFF0C\u5728\u5DE5\u4E1A\u4E92\u8054\u7F51\u9886\u57DF\u505A\u7684\u8FD8\u53EF\u4EE5\u3002</p><h3 id="\u6D77\u4FE1" tabindex="-1"><a class="header-anchor" href="#\u6D77\u4FE1" aria-hidden="true">#</a> \u6D77\u4FE1</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/qingdao-9645cf8d-d9dc-4de7-a192-bdb9a447ec49.png" alt=""></p><p>\u6211\u4E4B\u524D\u603B\u89C9\u5F97\u6D77\u4FE1\u548C\u6D77\u5C14\u6709\u67D0\u79CD\u8054\u7CFB\uFF0C\u4E0D\u8FC7\u6211\u67E5\u4E86\u4E0B\u5E76\u6CA1\u6709\uFF0C\u8DEF\u8FC7\u6D77\u4FE1\u7684\u56ED\u533A\u65F6\u89C9\u5F97\u6D77\u4FE1\u4E5F\u4FEE\u7684\u633A\u6F02\u4EAE\u7684\u3002\u4E00\u4E2A 211 \u7855\u58EB\u7206\u6599\u7684\u85AA\u8D44\u662F\u6BCF\u6708 10k\uFF0C\u7136\u540E\u4E00\u5E74 13 \u4E2A\u6708\u5DE5\u8D44\u3002\u798F\u5229\u5F85\u9047\u65B9\u9762\u611F\u89C9\u8FD8\u53EF\u4EE5\uFF0C\u524D\u4E24\u5E74\u6709\u514D\u8D39\u5BBF\u820D\uFF0C\u4EA4\u901A\u8865\u8D34\u6BCF\u6708 200\uFF0C\u4F4F\u623F\u8865\u8D34 800 \u6BCF\u6708\uFF0C\u53EF\u4EE5\u9886\u4E09\u5E74\u3002\u8BD5\u7528\u671F 6 \u4E2A\u6708\uFF0C\u8BD5\u7528\u671F\u95F4 90% \u85AA\u8D44\uFF0C\u514D\u8D39\u73ED\u8F66\uFF0C\u516C\u79EF\u91D1 10%\uFF0C\u793E\u4FDD\u5168\u989D\u3002\u5DE5\u4F5C\u65E99\u665A6\uFF0C\u4E2D\u5348\u4F11\u606F\u4E00\u5C0F\u65F6\u3002</p><p>\u53E6\u5916\u5C31\u662F\u5982\u679C\u8FD8\u662F\u559C\u6B22\u4E92\u8054\u7F51\u6C1B\u56F4\u7684\u8BDD\u53BB\u6D77\u4FE1\u805A\u597D\u770B\u6BD4\u8F83\u597D\uFF0C\u5C31\u662F\u6D77\u4FE1\u7535\u89C6\u4E0A\u90A3\u4E2A APP \uFF0C\u542C\u8BF4\u6280\u672F\u8FD8\u4E0D\u9519\uFF0C\u7ED9\u7684\u5DE5\u8D44\u4E5F\u76F8\u5BF9\u8F83\u9AD8\u3002\u4E0D\u8FC7\u52A0\u73ED\u591A\u554A\u3002</p><h3 id="\u5149\u5927\u94F6\u884C\u9752\u5C9B\u7814\u53D1\u4E2D\u5FC3" tabindex="-1"><a class="header-anchor" href="#\u5149\u5927\u94F6\u884C\u9752\u5C9B\u7814\u53D1\u4E2D\u5FC3" aria-hidden="true">#</a> \u5149\u5927\u94F6\u884C\u9752\u5C9B\u7814\u53D1\u4E2D\u5FC3</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/qingdao-7351e8f8-90d5-4f3c-998a-703b36ec1fca.png" alt=""></p><p>\u5F85\u9047\u542C\u8BF4\u8FD8\u4E0D\u9519\uFF0C\u4EE5\u524D\u662F\u5F52\u5206\u884C\u7BA1\uFF0C\u73B0\u5728\u5F52\u603B\u884C\u7BA1\u3002\u9752\u5C9B\u8FD9\u8FB9\u4E3B\u8981\u5F00\u53D1\u4E91\u7F34\u8D39\u4E1A\u52A1\u3002\u636E\u8BF4\u662F\u6709\u672B\u5C3E\u6DD8\u6C70\u673A\u5236\u3002\u8FD1\u51E0\u5E74\u597D\u591A\u5458\u5DE5\u90FD\u8DD1\u5230\u9752\u5C9B\u94F6\u884C\u4E86\u3002</p><h3 id="\u9752\u5C9B\u94F6\u884C" tabindex="-1"><a class="header-anchor" href="#\u9752\u5C9B\u94F6\u884C" aria-hidden="true">#</a> \u9752\u5C9B\u94F6\u884C</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/qingdao-cc5091a0-28ad-4439-8718-a6b79e80ef83.png" alt=""></p><p>\u9752\u5C9B\u94F6\u884C\u603B\u884C\u7684\u6280\u672F\u5C97\u3002\u85AA\u8D44\u4E0D\u7B97\u9AD8\uFF0C\u6709\u85AA\u8D44\u7206\u6599\u662F\u5E74\u85AA12w\uFF0C\u4E0D\u8FC7\u7B97\u662F\u6478\u9C7C\u7684\u5929\u5802\u4E86\uFF0C\u6D3B\u5927\u90E8\u5206\u662F\u5916\u5305\u5E72\u3002</p><h3 id="\u9752\u5C9B\u51EF\u4E9A" tabindex="-1"><a class="header-anchor" href="#\u9752\u5C9B\u51EF\u4E9A" aria-hidden="true">#</a> \u9752\u5C9B\u51EF\u4E9A</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/qingdao-9fcaebb9-fcf0-4b34-8302-c0be931ae1ce.png" alt=""></p><p>\u5728\u9752\u5C9B\u8F6F\u4EF6\u4F01\u4E1A\u80FD\u7B97\u4E2D\u4E0A\u6E38\u4E86\uFF0C\u4E0D\u8FC7\u5168\u9760\u540C\u884C\u886C\u6258\u3002\u52A0\u4E0A\u5404\u79CD\u8865\u8D34\uFF0C\u4E00\u5E74\u7684\u5DE5\u8D44\u5DEE\u4E0D\u591A\u662F\u662F\u5341\u4E8C\u4E09\u4E07\u5427\u3002\u8BD5\u7528\u671F\u5DE5\u8D44\u6253\u4E94\u516D\u6298\u3002\u6280\u672F\u8FD8\u53EF\u4EE5\uFF0C\u4E0D\u8FC7\u6709\u4EBA\u7206\u6599\u8BF4\u4ED6\u52A0\u73ED\u8FD8\u633A\u591A\u7684\u3002</p><h3 id="\u9752\u5C9B\u9F0E\u4FE1" tabindex="-1"><a class="header-anchor" href="#\u9752\u5C9B\u9F0E\u4FE1" aria-hidden="true">#</a> \u9752\u5C9B\u9F0E\u4FE1</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/qingdao-f941c172-1ff2-40ce-bea0-8cb52a030bf3.png" alt=""></p><p>\u4E3B\u8981\u505A\u901A\u4FE1\u7684\u516C\u53F8\uFF0C\u4E00\u4E2A\u5E94\u5C4A\u7855\u58EB\u7684\u7206\u6599\u662F\u7A0E\u524D13k\uFF0C\u6BCF\u5E7413\u4E2A\u6708\u7684\u5DE5\u8D44\uFF0C\u6709\u98DF\u5802\uFF0C\u6BCF\u4E2A\u6708600\u7684\u996D\u8865\u3002</p><h3 id="yeelight" tabindex="-1"><a class="header-anchor" href="#yeelight" aria-hidden="true">#</a> Yeelight</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/qingdao-7f88980b-d21e-4b27-9306-f911eb8a02e6.png" alt=""></p><p>Yeelight \u7B97\u662F\u5728\u9752\u5C9B\u4E3A\u6570\u4E0D\u591A\u7684\u5C0F\u800C\u7F8E\u7684\u516C\u53F8\u4E86\uFF0C\u76EE\u524D\u56E2\u961F330\u4EBA\uFF0C\u7814\u53D1\u4EBA\u5458\u8D85\u8FC7\u4E00\u534A\uFF0C\u4E3B\u8981\u505A\u667A\u80FD\u7167\u660E\uFF0C\u6709\u5C0F\u7C73\u7684\u6295\u8D44\u3002\u542C\u8BF4\u56E2\u961F\u6C1B\u56F4\u8FD8\u4E0D\u9519\uFF0C\u6BD4\u8F83\u91CD\u89C6\u6280\u672F\u3002\u6211\u5728\u7F51\u4E0A\u6CA1\u627E\u5230\u6821\u62DB\u5F85\u9047\u7684\u4ECB\u7ECD\uFF0C\u793E\u62DB\u7684\u8BDD BOSS \u62DB\u8058 3-5\u5E74 Java \u7ECF\u9A8C\u7684\u62A5\u4EF7\u662F 12k-24k\u3002</p><h3 id="\u4E2D\u8F66\u56DB\u65B9" tabindex="-1"><a class="header-anchor" href="#\u4E2D\u8F66\u56DB\u65B9" aria-hidden="true">#</a> \u4E2D\u8F66\u56DB\u65B9</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/qingdao-f75fc5b3-2587-42d5-a80f-592a49c515eb.png" alt=""></p><p>\u4E2D\u8F66\u56DB\u65B9\u662F\u56FD\u6709\u63A7\u80A1\u516C\u53F8\uFF0C\u85AA\u8D44\u5F85\u9047\u5728\u9752\u5C9B\u7B97\u4E2D\u4E0A\u3002\u4E5F\u62DB\u7A0B\u5E8F\u5458\u3002\u5E94\u5C4A\u6BD5\u4E1A\u751F\u662F6\u4E2A\u6708\u8BD5\u7528\u671F\uFF0C\u8F6C\u6B63\u4EE5\u540E\u6BCF\u5E74\u5DE5\u8D44\u7A0E\u524D\u5DEE\u4E0D\u591A15w\u5DE6\u53F3\u3002\u4E0D\u8FC7\u4ED6\u8FD9\u4E2A\u5DE5\u8D44\u6784\u6210\u548C\u522B\u4EBA\u4E0D\u4E00\u6837\u5440\u3002\u6BCF\u6708\u7A0E\u524D\u4E00\u4E07\u5DE6\u53F3\u7684\u5DE5\u8D44\u597D\u50CF\u5176\u4E2D\u516D\u5343\u5DE6\u53F3\u662F\u7EE9\u6548\uFF0C\u7136\u540E\u6BCF\u5E74\u5E74\u4E2D\u4F1A\u53D1\u4E00\u4E2A\u4E1A\u7EE9\u5956\u91D1\uFF0C\u4E0D\u540C\u90E8\u95E8\u7684\u5956\u91D1\u5DEE\u522B\u5F88\u5927\u3002</p><h3 id="\u4E2D\u753541\u6240" tabindex="-1"><a class="header-anchor" href="#\u4E2D\u753541\u6240" aria-hidden="true">#</a> \u4E2D\u753541\u6240</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/qingdao-53f614bb-d10d-4ae2-9f83-5911ef8ddead.png" alt=""></p><p>\u8BF4\u5B9E\u8BDD\uFF0C\u6211\u4E00\u76F4\u5BF9\u4E2D\u7535\u7CFB\u5217\u7684\u7814\u7A76\u6240\u5370\u8C61\u4E0D\u662F\u5F88\u597D\uFF0C\u4E0D\u8FC7\u542C\u8BF4\u4E2D\u753528\u6240\u7684\u85AA\u8D44\u540E\u5BF9\u4E2D\u7535\u7CFB\u5217\u7684\u5370\u8C61\u6709\u6240\u6539\u89C2\uFF08\u8FD9\u91CC\u662F\u95F2\u626F\u4E00\u53E5\u54C8\uFF0C\u4E2D\u753528\u6240\u5728\u5357\u4EAC\uFF0C\u548C\u9752\u5C9B\u6CA1\u5565\u5173\u7CFB\uFF09\u3002\u6CE8\u610F41\u6240\u5F97\u603B\u90E8\u662F\u5728\u5B89\u5FBD\uFF0C\u9752\u5C9B\u53EA\u662F\u4E00\u4E2A\u5206\u90E8\uFF0C\u6211\u4E86\u89E3\u5230\u662F\u52A0\u73ED\u4F1A\u6BD4\u8F83\u4E25\u91CD\u3002</p><p>\u597D\u561B\uFF0C\u597D\u4E0D\u5BB9\u6613\u51D1\u51FA\u6765\u8FD9\u51E0\u4E2A\u7A0B\u5E8F\u5458\u7684\u5DE5\u4F5C\u673A\u4F1A\uFF0C\u5927\u5BB6\u8981\u662F\u8FD8\u77E5\u9053\u4E00\u4E9B\u6BD4\u8F83\u597D\u7684\u5DE5\u4F5C\u673A\u4F1A\uFF0C\u6B22\u8FCE\u6765\u8865\u5145\u5440\u3002</p><h2 id="\u751F\u6D3B" tabindex="-1"><a class="header-anchor" href="#\u751F\u6D3B" aria-hidden="true">#</a> \u751F\u6D3B</h2><h3 id="\u623F\u4EF7" tabindex="-1"><a class="header-anchor" href="#\u623F\u4EF7" aria-hidden="true">#</a> \u623F\u4EF7</h3><p>\u9752\u5C9B\u623F\u5747\u4EF7\u4E24\u4E07\u591A\u4E86\u5427\u3002\u5D02\u5C71\u548C\u5E02\u5357\u6BD4\u8F83\u8D35\uFF0C\u5176\u5B83\u5730\u76F8\u5BF9\u597D\u4E00\u4E9B\u3002\u4E0B\u9762\u8FD9\u5F20\u56FE\u6709\u5404\u533A\u7684\u623F\u4EF7\uFF0C\u4E0D\u662F\u592A\u51C6\uFF0C\u4E0D\u8FC7\u53EF\u4EE5\u53C2\u8003\u4E0B\u5440\u3002\u611F\u89C9\u7A0B\u5E8F\u5458\u5728\u5317\u4EAC\u5E72\u51E0\u5E74\uFF0C\u6512\u4E2A\u9996\u4ED8\uFF0C\u7136\u540E\u56DE\u9752\u5C9B\u627E\u4E2A\u76F8\u5BF9\u7A33\u5B9A\u7684\u516C\u53F8\u4E0A\u73ED\uFF0C\u4E70\u623F\u538B\u529B\u8FD8\u4E0D\u662F\u5F88\u5927\uFF08\u9664\u4E86\u4E70\u5D02\u5C71\u548C\u5E02\u5357\u554A\uFF09\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/qingdao-a228e29e-363f-44a3-b8cc-6cdd18d34b9f.png" alt=""></p><h3 id="\u6559\u80B2" tabindex="-1"><a class="header-anchor" href="#\u6559\u80B2" aria-hidden="true">#</a> \u6559\u80B2</h3><p>\u611F\u89C9\u9752\u5C9B\u7684\u6559\u80B2\u65B9\u9762\u5F88\u4E0D\u9519\u3002</p><p>\u5927\u5B66\u65B9\u9762\uFF0C\u5C71\u4E1C\u5927\u5B66\u5728\u9752\u5C9B\u662F\u6709\u6821\u533A\u7684\uFF0C\u867D\u7136\u79BB\u5E02\u533A\u662F\u771F\u7684\u8FDC\uFF0C\u4F46\u662F\u4EBA\u5BB6\u6709\u5730\u94C1\u5440\u3002\u6211\u8BB0\u5F97\u5750\u90A3\u8D9F\u5730\u94C1\u53BB\u5C71\u4E1C\u5927\u5B66\u9752\u5C9B\u6821\u533A\u627E\u6211\u820D\u53CB\u65F6\u7A7F\u8D8A\u5D02\u5C71\uFF0C\u7A97\u5916\u7684\u98CE\u666F\u662F\u771F\u7684\u6F02\u4EAE\u3002\u4E2D\u56FD\u6D77\u6D0B\u5927\u5B66\u4E5F\u662F\u4E00\u6240985\uFF0C\u6821\u533A\u662F\u771F\u7684\u6F02\u4EAE\u3002\u4E2D\u56FD\u77F3\u6CB9\u5927\u5B66\u662F\u4E00\u6240211\uFF0C\u4E5F\u633A\u4E0D\u9519\u7684\u3002\u53E6\u5916\u50CF\u9752\u5C9B\u5927\u5B66\u3001\u9752\u5C9B\u7406\u5DE5\u5927\u5B66\u3001\u5C71\u4E1C\u79D1\u6280\u5927\u5B66\u8FD9\u4E9B\u9662\u6821\u4E5F\u662F\u4E0D\u9519\u7684\u3002\u8FD9\u51E0\u5E74\u5404\u4E2A\u9AD8\u6821\u4E5F\u5728\u9752\u5C9B\u4FEE\u5EFA\u4E86\u7814\u7A76\u9662\uFF0C\u611F\u89C9\u8FD8\u662F\u633A\u6709\u53D1\u5C55\u524D\u666F\u7684\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/qingdao-b37788d7-c33d-475a-bc69-05927bf0825d.png" alt=""></p><p>\u9AD8\u4E2D\u65B9\u9762\uFF0C\u9752\u5C9B\u4E8C\u4E2D\u3001\u9752\u5C9B\u4E00\u4E2D\u3001\u9752\u5C9B\u4E94\u5341\u516B\u4E2D\u3001\u9752\u5C9B\u4E5D\u4E2D\u3001\u5373\u58A8\u4E00\u4E2D\u7B49\u90FD\u975E\u5E38\u597D\u3002\u4E0D\u8FC7\u5C71\u4E1C\u9AD8\u8003\u7684\u538B\u529B\u662F\u771F\u7684\u5927\uFF0C\u611F\u89C9\u6211\u5927\u5B66\u548C\u8BFB\u7814\u65F6\u8EAB\u8FB9\u7684\u5C71\u4E1C\u540C\u5B66\uFF0C\u5F53\u5E74\u9AD8\u8003\u90FD\u662F\u82F1\u96C4\u822C\u7684\u4EBA\u7269\u3002</p><h3 id="\u98CE\u666F-\u7F8E\u98DF" tabindex="-1"><a class="header-anchor" href="#\u98CE\u666F-\u7F8E\u98DF" aria-hidden="true">#</a> \u98CE\u666F&amp;\u7F8E\u98DF</h3><p>\u9752\u5C9B\u662F\u771F\u7684\u633A\u7F8E\u7684\uFF0C\u611F\u89C9\u5728\u9752\u5C9B\u65E2\u80FD\u611F\u89C9\u5230\u73B0\u4EE3\u5316\u5927\u90FD\u5E02\u7684\u611F\u89C9\u3001\u53C8\u80FD\u4F53\u9A8C\u5230\u6C11\u56FD\u98CE\u60C5\u8FD8\u80FD\u4F53\u9A8C\u5230\u6B27\u5F0F\u98CE\u60C5\u3002\u53E6\u5916\u6211\u540C\u5B66\u5E26\u6211\u5728\u9752\u5C9B\u8F6C\u65F6\uFF0C\u7ECF\u5E38\u8D70\u7740\u8D70\u7740\u5C31\u89C1\u5230\u4E86\u5927\u6D77\uFF0C\u8FD9\u8BA9\u6211\u8FD9\u4E2A\u591A\u5E74\u8EAB\u5C45\u5185\u9646\uFF0C\u6CA1\u89C1\u8FC7\u6D77\u7684\u5C11\u5E74\u6765\u8BF4\u8FD8\u662F\u633A\u6B23\u559C\u7684\u3002\u611F\u89C9\u9752\u5C9B\u6BD4\u897F\u5B89\u51B7\u5F88\u591A\uFF0C\u4ECA\u5E744\u6708\u897F\u5B89\u5DF2\u7ECF\u5F88\u70ED\u4E86\uFF0C\u82B1\u90FD\u5F00\u4E86\uFF0C\u4F46\u662F\u53BB\u4E86\u9752\u5C9B\u4EE5\u540E\u53D1\u73B0\u67F3\u6811\u624D\u521A\u6709\u4E00\u70B9\u70B9\u7EFF\uFF0C\u8FD8\u633A\u51C9\u5FEB\u7684\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/qingdao-d619e60b-732b-497f-a4a0-ebbad7ce1ce9.png" alt=""></p><p>\u9752\u5C9B\u7684\u6D77\u9C9C\u662F\u633A\u4E30\u5BCC\u4E86\uFF0C\u8BA9\u6211\u8FD9\u4E2A\u5F88\u5C11\u5403\u6D77\u9C9C\u7684\u5C11\u5E74\u4E00\u6B21\u5403\u4E86\u4E2A\u591F\uFF0C\u8FD8\u4E70\u4E86\u4E9B\u6D77\u9C9C\u7ED9\u5BB6\u91CC\u9762\u5BC4\u4E86\u70B9\u3002\u679C\u7136\u5185\u9646\u7684\u6D77\u9C9C\u5403\u8D77\u6765\u548C\u6CBF\u6D77\u57CE\u5E02\u7684\u6D77\u9C9C\u5DEE\u597D\u591A\uFF0C\u53E6\u5916\u5C71\u4E1C\u83DC\u662F\u771F\u7684\u80FD\u5012\u9171\u6CB9\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/qingdao-ce0b22f6-0b52-425c-a5d0-4eefe52706f6.png" alt=""></p><h3 id="\u4EA4\u901A" tabindex="-1"><a class="header-anchor" href="#\u4EA4\u901A" aria-hidden="true">#</a> \u4EA4\u901A</h3><p>\u611F\u89C9\u9752\u5C9B\u4EA4\u901A\u8FD8\u662F\u4E0D\u9519\u7684\uFF0C\u5730\u94C1\u7EBF\u8DEF\u633A\u53D1\u8FBE\uFF0C\u5C24\u5176\u662F\u6709\u6761\u5730\u94C1\u7EBF\u76F4\u63A5\u4ECE\u5E02\u91CC\u901A\u5230\u5C71\u4E1C\u5927\u5B66\u8BA9\u6211\u89C9\u5F97\u5F88\u8D5E\u3002\u5750\u8F66\u5728\u5E02\u91CC\u6E38\u8361\u7684\u65F6\u5019\u4E0D\u77E5\u9053\u662F\u4E0D\u662F\u56E0\u4E3A\u907F\u5F00\u4E86\u62E5\u5835\u7684\u5730\u533A\uFF0C\u6211\u611F\u89C9\u5835\u8F66\u4E0D\u592A\u4E25\u91CD\u3002\u4E0D\u8FC7\u5C71\u4E1C\u4EBA\u5F00\u8D77\u8F66\u6765\u662F\u771F\u7684\u6709\u70B9\u731B\u3002</p>',53),b=a("\u4F5C\u8005\uFF1A\u5927\u767D\uFF0C\u8F6C\u8F7D\u94FE\u63A5\uFF1A"),s={href:"https://mp.weixin.qq.com/s/8QQvOrkG3Vdjj3GxP1zxBQ",target:"_blank",rel:"noopener noreferrer"},g=a("https://mp.weixin.qq.com/s/8QQvOrkG3Vdjj3GxP1zxBQ"),l=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png",alt:""})],-1);function m(f,v){const t=c("ExternalLinkIcon");return d(),i("div",null,[p,e("blockquote",null,[e("p",null,[b,e("a",s,[g,n(t)])])]),l])}var u=r(o,[["render",m],["__file","qingdao.html.vue"]]);export{u as default};
diff --git a/dist/assets/rabbitmq-rumen.html.719aebed.js b/dist/assets/rabbitmq-rumen.html.5bf7bc58.js
similarity index 99%
rename from dist/assets/rabbitmq-rumen.html.719aebed.js
rename to dist/assets/rabbitmq-rumen.html.5bf7bc58.js
index bd18791b..a01d3710 100644
--- a/dist/assets/rabbitmq-rumen.html.719aebed.js
+++ b/dist/assets/rabbitmq-rumen.html.5bf7bc58.js
@@ -1,4 +1,4 @@
-import{_ as p}from"./plugin-vue_export-helper.21dcd24c.js";import{r as o,o as c,c as l,a as n,b as t,d as a,e}from"./app.a0271b9c.js";const i={},u=n("h1",{id:"rabbitmq\u5165\u95E8\u6559\u7A0B-\u6982\u5FF5\u3001\u5E94\u7528\u573A\u666F\u3001\u5B89\u88C5\u3001\u4F7F\u7528",tabindex:"-1"},[n("a",{class:"header-anchor",href:"#rabbitmq\u5165\u95E8\u6559\u7A0B-\u6982\u5FF5\u3001\u5E94\u7528\u573A\u666F\u3001\u5B89\u88C5\u3001\u4F7F\u7528","aria-hidden":"true"},"#"),a(" RabbitMQ\u5165\u95E8\u6559\u7A0B\uFF08\u6982\u5FF5\u3001\u5E94\u7528\u573A\u666F\u3001\u5B89\u88C5\u3001\u4F7F\u7528\uFF09")],-1),r=n("p",null,"\u4EBA\u4E00\u8F88\u5B50\u6700\u503C\u5F97\u70AB\u8000\u7684\u4E0D\u5E94\u8BE5\u662F\u4F60\u7684\u8D22\u5BCC\u6709\u591A\u5C11\uFF08\u867D\u7136\u8FD9\u8BDD\u8BF4\u5F97\u6709\u70B9\u8FDD\u5FC3\uFF0C\u5475\u5475\uFF09\uFF0C\u800C\u662F\u4F60\u7684\u5B66\u4E60\u80FD\u529B\u3002\u6280\u672F\u66F4\u65B0\u8FED\u4EE3\u7684\u901F\u5EA6\u975E\u5E38\u5FEB\uFF0C\u90A3\u4F5C\u4E3A\u7A0B\u5E8F\u5458\uFF0C\u6211\u4EEC\u5C31\u5E94\u8BE5\u62E5\u6709\u4E00\u9897\u62E5\u62B1\u53D8\u5316\u7684\u5FC3\uFF0C\u79EF\u6781\u5730\u8DDF\u8FDB\u3002",-1),d=a("\u5728 RabbitMQ \u5165\u95E8\u4E4B\u524D\uFF0C\u6211\u5DF2\u7ECF\u5165\u95E8\u4E86 "),k={href:"https://mp.weixin.qq.com/s/NPJkMy5RppyFk9QhzHxhrw",target:"_blank",rel:"noopener noreferrer"},b=a("Redis"),m=a("\u3001"),v={href:"https://mp.weixin.qq.com/s/ZjsZxle7m_dfmVwVkq2ayg",target:"_blank",rel:"noopener noreferrer"},g=a("Elasticsearch"),h=a(" \u548C "),_={href:"https://mp.weixin.qq.com/s/qz0sNOFeS0GTW-H9cdnbJg",target:"_blank",rel:"noopener noreferrer"},f=a("MongoDB"),q=a("\uFF0C\u8FD9\u8BA9\u6211\u611F\u89C9\u81EA\u5DF1\u5BCC\u6709\u6781\u5BA2\u7CBE\u795E\uFF0C\u975E\u5E38\u826F\u597D\u3002"),w=e('<p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mq/rabbitmq-rumen-d416cab5-69bd-46a6-b65c-8cf3b6667136.jpg" alt=""></p><p>\u5C0F\u4F19\u4F34\u4EEC\u5728\u7EE7\u7EED\u9605\u8BFB\u4E4B\u524D\uFF0C\u6211\u5FC5\u987B\u8981\u58F0\u660E\u4E00\u70B9\uFF0C\u6211\u5BF9 RabbitMQ \u5E76\u6CA1\u6709\u8FDB\u884C\u5F88\u6DF1\u5165\u7684\u7814\u7A76\uFF0C\u4EC5\u4EC5\u662F\u56E0\u4E3A\u8981\u7528\uFF0C\u5C31\u5B66\u4E00\u4E0B\u3002\u4F46\u4F5C\u4E3A\u4E00\u540D\u8D1F\u8D23\u4EFB\u7684\u6280\u672F\u535A\u4E3B\uFF0C\u6211\u662F\u52A8\u4E86\u5FC3\u7684\uFF0C\u8FD9\u7BC7\u5165\u95E8\u6559\u7A0B\uFF0C\u5C0F\u4F19\u4F34\u4EEC\u8BFB\u5B8C\u540E\u7EDD\u5BF9\u4F1A\u611F\u5230\u6EE1\u610F\uFF0C\u5FCD\u4E0D\u4F4F\u65E0\u60C5\u5730\u70B9\u8D5E\uFF0C\u4EE5\u53CA\u8D64\u88F8\u88F8\u5730\u8F6C\u53D1\u3002</p><p>\u5F53\u7136\u4E86\uFF0C\u5C0F\u4F19\u4F34\u4EEC\u9047\u5230\u6587\u7AE0\u4E2D\u6709\u9519\u8BEF\u7684\u5730\u65B9\uFF0C\u4E0D\u8981\u624B\u4E0B\u7559\u60C5\uFF0C\u53EF\u4EE5\u7EC4\u56E2\u8FC7\u6765\u6376\u6211\uFF0C\u4F46\u8981\u4FDD\u8BC1\u4E00\u70B9\uFF0C\u4E0D\u8981\u6253\u8138\uFF0C\u6211\u6015\u6BC1\u5BB9\u3002</p><h3 id="_01\u3001rabbitmq-\u662F\u4EC0\u4E48" tabindex="-1"><a class="header-anchor" href="#_01\u3001rabbitmq-\u662F\u4EC0\u4E48" aria-hidden="true">#</a> 01\u3001RabbitMQ \u662F\u4EC0\u4E48</h3><p>\u9996\u5148\uFF0C\u6211\u77E5\u9053\uFF0CRabbit \u662F\u4E00\u53EA\u5154\u5B50\uFF08\u54CE\u5440\u5988\u5440\uFF0C\u5FCD\u4E0D\u4F4F\u79C0\u4E86\u4E00\u6CE2\u81EA\u5DF1\u7684\u82F1\u8BED\u529F\u5E95\uFF09\uFF0C\u53EF\u7231\u7684\u5F62\u8C61\u5DF2\u7ECF\u8DC3\u7136\u4E8E\u6211\u7684\u8111\u6D77\u4E2D\u4E86\u3002\u90A3 MQ \u53C8\u662F\u4EC0\u4E48\u5462\uFF1F\u662F Message Queue \u7684\u9996\u5B57\u6BCD\u7F29\u5199\uFF0C\u4E5F\u5C31\u662F\u8BF4 RabbitMQ \u662F\u4E00\u6B3E\u5F00\u6E90\u7684\u6D88\u606F\u961F\u5217\u7CFB\u7EDF\u3002</p><p>RabbitMQ \u7684\u4E3B\u8981\u7279\u70B9\u5728\u4E8E\u5065\u58EE\u6027\u597D\u3001\u6613\u4E8E\u4F7F\u7528\u3001\u9AD8\u6027\u80FD\u3001\u9AD8\u5E76\u53D1\u3001\u96C6\u7FA4\u6613\u6269\u5C55\uFF0C\u4EE5\u53CA\u5F3A\u5927\u7684\u5F00\u6E90\u793E\u533A\u652F\u6301\u3002\u53CD\u6B63\u5C31\u662F\u5F88\u725B\u903C\u7684\u6837\u5B50\u3002</p><p>\u4E5D\u5E74\u524D\u6211\u505A\u5927\u5B97\u671F\u8D27\u4EA4\u6613\u7684\u65F6\u5019\uFF0C\u4E5F\u9700\u8981\u6D88\u606F\u63A8\u9001\uFF0C\u90A3\u65F6\u5019\u8FD8\u4E0D\u77E5\u9053\u53BB\u627E\u8FD9\u79CD\u73B0\u6210\u7684\u4E2D\u95F4\u4EF6\uFF0C\u5C31\u7528\u81EA\u5B9A\u4E49\u7684\u961F\u5217\u5B9E\u73B0\uFF0C\u7ED3\u679C\u641E\u4E86\u4E0D\u5C11 bug\uFF0C\u6709\u4E9B\u5230\u73B0\u5728\u8FD8\u6CA1\u6709\u89E3\u51B3\uFF0C\u771F\u7684\u662F\u4E0D\u582A\u56DE\u9996\u7684\u5F80\u4E8B\u554A\u3002</p><p>\u4E0B\u56FE\u662F RabbitMQ \u7684\u6D88\u606F\u6A21\u578B\u56FE\uFF08\u6765\u6E90\u4E8E\u7F51\u7EDC\uFF0C\u4FB5\u5220\uFF09\uFF0C\u5C0F\u4F19\u4F34\u4EEC\u6765\u611F\u53D7\u4E0B\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mq/rabbitmq-rumen-0e8d83f8-fdf0-4755-9131-1f5c775ca010.jpg" alt=""></p><p>1\uFF09P \u662F Producer\uFF0C\u4EE3\u8868\u751F\u4EA7\u8005\uFF0C\u4E5F\u5C31\u662F\u6D88\u606F\u7684\u53D1\u9001\u8005\uFF0C\u53EF\u4EE5\u5C06\u6D88\u606F\u53D1\u9001\u5230 X</p><p>2\uFF09X \u662F Exchange\uFF08\u4E3A\u5565\u4E0D\u662F E\uFF0C\u6211\u4E5F\u5F88\u597D\u5947\uFF09\uFF0C\u4EE3\u8868\u4EA4\u6362\u673A\uFF0C\u53EF\u4EE5\u63A5\u53D7\u751F\u4EA7\u8005\u53D1\u9001\u7684\u6D88\u606F\uFF0C\u5E76\u6839\u636E\u8DEF\u7531\u5C06\u6D88\u606F\u53D1\u9001\u7ED9\u6307\u5B9A\u7684\u961F\u5217</p><p>3\uFF09Q \u662F Queue\uFF0C\u4E5F\u5C31\u662F\u961F\u5217\uFF0C\u5B58\u653E\u4EA4\u6362\u673A\u53D1\u9001\u6765\u7684\u6D88\u606F</p><p>4\uFF09C \u662F Consumer\uFF0C\u4EE3\u8868\u6D88\u8D39\u8005\uFF0C\u4E5F\u5C31\u662F\u6D88\u606F\u7684\u63A5\u53D7\u8005\uFF0C\u4ECE\u961F\u5217\u4E2D\u83B7\u53D6\u6D88\u606F</p><p>\u542C\u6211\u8FD9\u6837\u4E00\u89E3\u91CA\uFF0C\u662F\u4E0D\u662F\u5BF9 RabbitMQ \u7684\u5370\u8C61\u5C31\u5F88\u5177\u8C61\u5316\u4E86\uFF1F\u5C0F\u4F19\u4F34\u4EEC\uFF0C\u5B66\u8D77\u6765\u5427\uFF01</p><h3 id="_02\u3001\u5B89\u88C5-erlang" tabindex="-1"><a class="header-anchor" href="#_02\u3001\u5B89\u88C5-erlang" aria-hidden="true">#</a> 02\u3001\u5B89\u88C5 Erlang</h3><p>\u54A6\uFF0C\u600E\u4E48\u4E0D\u662F\u5B89\u88C5 RabbitMQ \u554A\uFF1F\u5148\u6765\u770B\u770B\u5B98\u65B9\u7684\u89E3\u91CA\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mq/rabbitmq-rumen-9012f7d7-01bf-437a-ac98-f6a71390105e.jpg" alt=""></p><p>\u82F1\u6587\u770B\u4E0D\u592A\u61C2\uFF0C\u6CA1\u5173\u7CFB\uFF0C\u6211\u6765\u8865\u5145\u4E24\u53E5\u4EBA\u8BDD\u3002RabbitMQ \u670D\u52A1\u5668\u662F\u7528 Erlang \u8BED\u8A00\u7F16\u5199\u7684\uFF0C\u5B83\u7684\u5B89\u88C5\u5305\u91CC\u5E76\u6CA1\u6709\u96C6\u6210 Erlang \u7684\u73AF\u5883\uFF0C\u56E0\u6B64\u9700\u8981\u5148\u5B89\u88C5 Erlang\u3002\u5C0F\u4F19\u4F34\u4EEC\u4E0D\u8981\u62C5\u5FC3\uFF0CErlang \u5B89\u88C5\u8D77\u6765\u6CA1\u6709\u4EFB\u4F55\u96BE\u5EA6\u3002</p><p>Erlang \u4E0B\u8F7D\u5730\u5740\u5982\u4E0B\uFF1A</p>',19),y={href:"https://erlang.org/download/otp_versions_tree.html",target:"_blank",rel:"noopener noreferrer"},j=a("https://erlang.org/download/otp_versions_tree.html"),x=n("p",null,"\u6700\u65B0\u7684\u7248\u672C\u662F 23.0.1\uFF0C\u6211\u9009\u62E9\u7684\u662F 64 \u4F4D\u7684\u7248\u672C\uFF0C104M \u5DE6\u53F3\u3002\u4E0B\u8F7D\u5B8C\u5C31\u53EF\u4EE5\u53CC\u51FB\u8FD0\u884C\u5B89\u88C5\uFF0C\u50BB\u74DC\u5F0F\u7684\u3002",-1),E=n("p",null,[n("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mq/rabbitmq-rumen-644fafa4-a4bc-45a2-831a-12deda958122.jpg",alt:""})],-1),Q=n("p",null,"\u9700\u8981\u6CE8\u610F\u7684\u662F\uFF0C\u6211\u5B89\u88C5\u7684\u8FC7\u7A0B\u4E2D\uFF0C\u7535\u8111\u91CD\u542F\u4E86\u4E00\u6B21\uFF0C\u597D\u50CF\u8981\u5B89\u88C5\u4E00\u4E2A\u4EC0\u4E48\u5E93\uFF0C\u91CD\u542F\u4E4B\u524D\u5FD8\u8BB0\u4FDD\u5B58\u56FE\u7247\u4E86\uFF08sorry\uFF09\u3002\u91CD\u542F\u540E\uFF0C\u91CD\u65B0\u53CC\u51FB\u8FD0\u884C otp_win64_23.0.1.exe \u6587\u4EF6\u5B8C\u6210 Erlang \u5B89\u88C5\u3002",-1),C=n("h3",{id:"_03\u3001\u5B89\u88C5-rabbitmq",tabindex:"-1"},[n("a",{class:"header-anchor",href:"#_03\u3001\u5B89\u88C5-rabbitmq","aria-hidden":"true"},"#"),a(" 03\u3001\u5B89\u88C5 RabbitMQ")],-1),M=n("p",null,"Erlang \u5B89\u88C5\u6210\u529F\u540E\uFF0C\u5C31\u53EF\u4EE5\u5B89\u88C5 RabbitMQ \u4E86\u3002\u4E0B\u8F7D\u5730\u5740\u5982\u4E0B\u6240\u793A\uFF1A",-1),R={href:"https://www.rabbitmq.com/install-windows.html",target:"_blank",rel:"noopener noreferrer"},U=a("https://www.rabbitmq.com/install-windows.html"),S=e(`<p>\u627E\u5230\u4E0B\u56FE\u4E2D\u7684\u4F4D\u7F6E\uFF0C\u9009\u62E9\u7EA2\u8272\u6846\u4E2D\u7684\u6587\u4EF6\u8FDB\u884C\u4E0B\u8F7D\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mq/rabbitmq-rumen-43268557-1240-4ed4-9883-de93668f1f04.jpg" alt=""></p><p>\u5B89\u88C5\u5305\u53EA\u6709 16.5M \u5927\u5C0F\uFF0C\u8FD8\u662F\u975E\u5E38\u8F7B\u91CF\u7EA7\u7684\u3002\u4E0B\u8F7D\u5B8C\u540E\u76F4\u63A5\u53CC\u51FB\u8FD0\u884C exe \u6587\u4EF6\u5C31\u53EF\u4EE5\u50BB\u74DC\u5F0F\u5730\u5B89\u88C5\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mq/rabbitmq-rumen-b3343075-f9a8-441f-b266-0750df82a1c6.jpg" alt=""></p><p>\u5B89\u88C5\u6210\u529F\u540E\uFF0C\u5C31\u53EF\u4EE5\u5C06 RabbitMQ \u4F5C\u4E3A Windows \u670D\u52A1\u542F\u52A8\uFF0C\u53EF\u4EE5\u4ECE\u201C\u5F00\u59CB\u201D\u83DC\u5355\u7BA1\u7406 RabbitMQ Windows \u670D\u52A1\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mq/rabbitmq-rumen-6f185cbd-b3ab-432a-85df-be3a93450533.jpg" alt=""></p><p>\u70B9\u51FB\u300CRabbitMQ Command Prompt (sbin dir)\u300D\uFF0C\u8FDB\u5165\u547D\u4EE4\u884C\uFF0C\u8F93\u5165 <code>rabbitmqctl.bat status</code> \u53EF\u786E\u8BA4 RabbitMQ \u7684\u542F\u52A8\u72B6\u6001\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mq/rabbitmq-rumen-d9407f52-3585-4c3c-af2f-7b7c4ec45461.jpg" alt=""></p><p>\u53EF\u4EE5\u770B\u5230 RabbitMQ \u4E00\u4E9B\u72B6\u6001\u4FE1\u606F\uFF1A</p><ul><li>\u8FDB\u7A0B ID\uFF0C\u4E5F\u5C31\u662F PID \u4E3A 2816</li><li>\u64CD\u4F5C\u7CFB\u7EDF\u4E3A Windows</li><li>\u5F53\u524D\u7684\u7248\u672C\u53F7\u4E3A 3.8.4</li><li>Erlang \u7684\u914D\u7F6E\u4FE1\u606F</li></ul><p>\u547D\u4EE4\u884C\u754C\u9762\u770B\u8D77\u6765\u4E0D\u591F\u4F18\u96C5\uFF0C\u56E0\u6B64\u6211\u4EEC\u53EF\u4EE5\u8F93\u5165\u4EE5\u4E0B\u547D\u4EE4\u6765\u542F\u7528\u5BA2\u6237\u7AEF\u7BA1\u7406 UI \u63D2\u4EF6\uFF1A</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>rabbitmq-plugins enable rabbitmq_management
+import{_ as p}from"./plugin-vue_export-helper.21dcd24c.js";import{r as o,o as c,c as l,a as n,b as t,d as a,e}from"./app.615e41d8.js";const i={},u=n("h1",{id:"rabbitmq\u5165\u95E8\u6559\u7A0B-\u6982\u5FF5\u3001\u5E94\u7528\u573A\u666F\u3001\u5B89\u88C5\u3001\u4F7F\u7528",tabindex:"-1"},[n("a",{class:"header-anchor",href:"#rabbitmq\u5165\u95E8\u6559\u7A0B-\u6982\u5FF5\u3001\u5E94\u7528\u573A\u666F\u3001\u5B89\u88C5\u3001\u4F7F\u7528","aria-hidden":"true"},"#"),a(" RabbitMQ\u5165\u95E8\u6559\u7A0B\uFF08\u6982\u5FF5\u3001\u5E94\u7528\u573A\u666F\u3001\u5B89\u88C5\u3001\u4F7F\u7528\uFF09")],-1),r=n("p",null,"\u4EBA\u4E00\u8F88\u5B50\u6700\u503C\u5F97\u70AB\u8000\u7684\u4E0D\u5E94\u8BE5\u662F\u4F60\u7684\u8D22\u5BCC\u6709\u591A\u5C11\uFF08\u867D\u7136\u8FD9\u8BDD\u8BF4\u5F97\u6709\u70B9\u8FDD\u5FC3\uFF0C\u5475\u5475\uFF09\uFF0C\u800C\u662F\u4F60\u7684\u5B66\u4E60\u80FD\u529B\u3002\u6280\u672F\u66F4\u65B0\u8FED\u4EE3\u7684\u901F\u5EA6\u975E\u5E38\u5FEB\uFF0C\u90A3\u4F5C\u4E3A\u7A0B\u5E8F\u5458\uFF0C\u6211\u4EEC\u5C31\u5E94\u8BE5\u62E5\u6709\u4E00\u9897\u62E5\u62B1\u53D8\u5316\u7684\u5FC3\uFF0C\u79EF\u6781\u5730\u8DDF\u8FDB\u3002",-1),d=a("\u5728 RabbitMQ \u5165\u95E8\u4E4B\u524D\uFF0C\u6211\u5DF2\u7ECF\u5165\u95E8\u4E86 "),k={href:"https://mp.weixin.qq.com/s/NPJkMy5RppyFk9QhzHxhrw",target:"_blank",rel:"noopener noreferrer"},b=a("Redis"),m=a("\u3001"),v={href:"https://mp.weixin.qq.com/s/ZjsZxle7m_dfmVwVkq2ayg",target:"_blank",rel:"noopener noreferrer"},g=a("Elasticsearch"),h=a(" \u548C "),_={href:"https://mp.weixin.qq.com/s/qz0sNOFeS0GTW-H9cdnbJg",target:"_blank",rel:"noopener noreferrer"},f=a("MongoDB"),q=a("\uFF0C\u8FD9\u8BA9\u6211\u611F\u89C9\u81EA\u5DF1\u5BCC\u6709\u6781\u5BA2\u7CBE\u795E\uFF0C\u975E\u5E38\u826F\u597D\u3002"),w=e('<p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mq/rabbitmq-rumen-d416cab5-69bd-46a6-b65c-8cf3b6667136.jpg" alt=""></p><p>\u5C0F\u4F19\u4F34\u4EEC\u5728\u7EE7\u7EED\u9605\u8BFB\u4E4B\u524D\uFF0C\u6211\u5FC5\u987B\u8981\u58F0\u660E\u4E00\u70B9\uFF0C\u6211\u5BF9 RabbitMQ \u5E76\u6CA1\u6709\u8FDB\u884C\u5F88\u6DF1\u5165\u7684\u7814\u7A76\uFF0C\u4EC5\u4EC5\u662F\u56E0\u4E3A\u8981\u7528\uFF0C\u5C31\u5B66\u4E00\u4E0B\u3002\u4F46\u4F5C\u4E3A\u4E00\u540D\u8D1F\u8D23\u4EFB\u7684\u6280\u672F\u535A\u4E3B\uFF0C\u6211\u662F\u52A8\u4E86\u5FC3\u7684\uFF0C\u8FD9\u7BC7\u5165\u95E8\u6559\u7A0B\uFF0C\u5C0F\u4F19\u4F34\u4EEC\u8BFB\u5B8C\u540E\u7EDD\u5BF9\u4F1A\u611F\u5230\u6EE1\u610F\uFF0C\u5FCD\u4E0D\u4F4F\u65E0\u60C5\u5730\u70B9\u8D5E\uFF0C\u4EE5\u53CA\u8D64\u88F8\u88F8\u5730\u8F6C\u53D1\u3002</p><p>\u5F53\u7136\u4E86\uFF0C\u5C0F\u4F19\u4F34\u4EEC\u9047\u5230\u6587\u7AE0\u4E2D\u6709\u9519\u8BEF\u7684\u5730\u65B9\uFF0C\u4E0D\u8981\u624B\u4E0B\u7559\u60C5\uFF0C\u53EF\u4EE5\u7EC4\u56E2\u8FC7\u6765\u6376\u6211\uFF0C\u4F46\u8981\u4FDD\u8BC1\u4E00\u70B9\uFF0C\u4E0D\u8981\u6253\u8138\uFF0C\u6211\u6015\u6BC1\u5BB9\u3002</p><h3 id="_01\u3001rabbitmq-\u662F\u4EC0\u4E48" tabindex="-1"><a class="header-anchor" href="#_01\u3001rabbitmq-\u662F\u4EC0\u4E48" aria-hidden="true">#</a> 01\u3001RabbitMQ \u662F\u4EC0\u4E48</h3><p>\u9996\u5148\uFF0C\u6211\u77E5\u9053\uFF0CRabbit \u662F\u4E00\u53EA\u5154\u5B50\uFF08\u54CE\u5440\u5988\u5440\uFF0C\u5FCD\u4E0D\u4F4F\u79C0\u4E86\u4E00\u6CE2\u81EA\u5DF1\u7684\u82F1\u8BED\u529F\u5E95\uFF09\uFF0C\u53EF\u7231\u7684\u5F62\u8C61\u5DF2\u7ECF\u8DC3\u7136\u4E8E\u6211\u7684\u8111\u6D77\u4E2D\u4E86\u3002\u90A3 MQ \u53C8\u662F\u4EC0\u4E48\u5462\uFF1F\u662F Message Queue \u7684\u9996\u5B57\u6BCD\u7F29\u5199\uFF0C\u4E5F\u5C31\u662F\u8BF4 RabbitMQ \u662F\u4E00\u6B3E\u5F00\u6E90\u7684\u6D88\u606F\u961F\u5217\u7CFB\u7EDF\u3002</p><p>RabbitMQ \u7684\u4E3B\u8981\u7279\u70B9\u5728\u4E8E\u5065\u58EE\u6027\u597D\u3001\u6613\u4E8E\u4F7F\u7528\u3001\u9AD8\u6027\u80FD\u3001\u9AD8\u5E76\u53D1\u3001\u96C6\u7FA4\u6613\u6269\u5C55\uFF0C\u4EE5\u53CA\u5F3A\u5927\u7684\u5F00\u6E90\u793E\u533A\u652F\u6301\u3002\u53CD\u6B63\u5C31\u662F\u5F88\u725B\u903C\u7684\u6837\u5B50\u3002</p><p>\u4E5D\u5E74\u524D\u6211\u505A\u5927\u5B97\u671F\u8D27\u4EA4\u6613\u7684\u65F6\u5019\uFF0C\u4E5F\u9700\u8981\u6D88\u606F\u63A8\u9001\uFF0C\u90A3\u65F6\u5019\u8FD8\u4E0D\u77E5\u9053\u53BB\u627E\u8FD9\u79CD\u73B0\u6210\u7684\u4E2D\u95F4\u4EF6\uFF0C\u5C31\u7528\u81EA\u5B9A\u4E49\u7684\u961F\u5217\u5B9E\u73B0\uFF0C\u7ED3\u679C\u641E\u4E86\u4E0D\u5C11 bug\uFF0C\u6709\u4E9B\u5230\u73B0\u5728\u8FD8\u6CA1\u6709\u89E3\u51B3\uFF0C\u771F\u7684\u662F\u4E0D\u582A\u56DE\u9996\u7684\u5F80\u4E8B\u554A\u3002</p><p>\u4E0B\u56FE\u662F RabbitMQ \u7684\u6D88\u606F\u6A21\u578B\u56FE\uFF08\u6765\u6E90\u4E8E\u7F51\u7EDC\uFF0C\u4FB5\u5220\uFF09\uFF0C\u5C0F\u4F19\u4F34\u4EEC\u6765\u611F\u53D7\u4E0B\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mq/rabbitmq-rumen-0e8d83f8-fdf0-4755-9131-1f5c775ca010.jpg" alt=""></p><p>1\uFF09P \u662F Producer\uFF0C\u4EE3\u8868\u751F\u4EA7\u8005\uFF0C\u4E5F\u5C31\u662F\u6D88\u606F\u7684\u53D1\u9001\u8005\uFF0C\u53EF\u4EE5\u5C06\u6D88\u606F\u53D1\u9001\u5230 X</p><p>2\uFF09X \u662F Exchange\uFF08\u4E3A\u5565\u4E0D\u662F E\uFF0C\u6211\u4E5F\u5F88\u597D\u5947\uFF09\uFF0C\u4EE3\u8868\u4EA4\u6362\u673A\uFF0C\u53EF\u4EE5\u63A5\u53D7\u751F\u4EA7\u8005\u53D1\u9001\u7684\u6D88\u606F\uFF0C\u5E76\u6839\u636E\u8DEF\u7531\u5C06\u6D88\u606F\u53D1\u9001\u7ED9\u6307\u5B9A\u7684\u961F\u5217</p><p>3\uFF09Q \u662F Queue\uFF0C\u4E5F\u5C31\u662F\u961F\u5217\uFF0C\u5B58\u653E\u4EA4\u6362\u673A\u53D1\u9001\u6765\u7684\u6D88\u606F</p><p>4\uFF09C \u662F Consumer\uFF0C\u4EE3\u8868\u6D88\u8D39\u8005\uFF0C\u4E5F\u5C31\u662F\u6D88\u606F\u7684\u63A5\u53D7\u8005\uFF0C\u4ECE\u961F\u5217\u4E2D\u83B7\u53D6\u6D88\u606F</p><p>\u542C\u6211\u8FD9\u6837\u4E00\u89E3\u91CA\uFF0C\u662F\u4E0D\u662F\u5BF9 RabbitMQ \u7684\u5370\u8C61\u5C31\u5F88\u5177\u8C61\u5316\u4E86\uFF1F\u5C0F\u4F19\u4F34\u4EEC\uFF0C\u5B66\u8D77\u6765\u5427\uFF01</p><h3 id="_02\u3001\u5B89\u88C5-erlang" tabindex="-1"><a class="header-anchor" href="#_02\u3001\u5B89\u88C5-erlang" aria-hidden="true">#</a> 02\u3001\u5B89\u88C5 Erlang</h3><p>\u54A6\uFF0C\u600E\u4E48\u4E0D\u662F\u5B89\u88C5 RabbitMQ \u554A\uFF1F\u5148\u6765\u770B\u770B\u5B98\u65B9\u7684\u89E3\u91CA\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mq/rabbitmq-rumen-9012f7d7-01bf-437a-ac98-f6a71390105e.jpg" alt=""></p><p>\u82F1\u6587\u770B\u4E0D\u592A\u61C2\uFF0C\u6CA1\u5173\u7CFB\uFF0C\u6211\u6765\u8865\u5145\u4E24\u53E5\u4EBA\u8BDD\u3002RabbitMQ \u670D\u52A1\u5668\u662F\u7528 Erlang \u8BED\u8A00\u7F16\u5199\u7684\uFF0C\u5B83\u7684\u5B89\u88C5\u5305\u91CC\u5E76\u6CA1\u6709\u96C6\u6210 Erlang \u7684\u73AF\u5883\uFF0C\u56E0\u6B64\u9700\u8981\u5148\u5B89\u88C5 Erlang\u3002\u5C0F\u4F19\u4F34\u4EEC\u4E0D\u8981\u62C5\u5FC3\uFF0CErlang \u5B89\u88C5\u8D77\u6765\u6CA1\u6709\u4EFB\u4F55\u96BE\u5EA6\u3002</p><p>Erlang \u4E0B\u8F7D\u5730\u5740\u5982\u4E0B\uFF1A</p>',19),y={href:"https://erlang.org/download/otp_versions_tree.html",target:"_blank",rel:"noopener noreferrer"},j=a("https://erlang.org/download/otp_versions_tree.html"),x=n("p",null,"\u6700\u65B0\u7684\u7248\u672C\u662F 23.0.1\uFF0C\u6211\u9009\u62E9\u7684\u662F 64 \u4F4D\u7684\u7248\u672C\uFF0C104M \u5DE6\u53F3\u3002\u4E0B\u8F7D\u5B8C\u5C31\u53EF\u4EE5\u53CC\u51FB\u8FD0\u884C\u5B89\u88C5\uFF0C\u50BB\u74DC\u5F0F\u7684\u3002",-1),E=n("p",null,[n("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mq/rabbitmq-rumen-644fafa4-a4bc-45a2-831a-12deda958122.jpg",alt:""})],-1),Q=n("p",null,"\u9700\u8981\u6CE8\u610F\u7684\u662F\uFF0C\u6211\u5B89\u88C5\u7684\u8FC7\u7A0B\u4E2D\uFF0C\u7535\u8111\u91CD\u542F\u4E86\u4E00\u6B21\uFF0C\u597D\u50CF\u8981\u5B89\u88C5\u4E00\u4E2A\u4EC0\u4E48\u5E93\uFF0C\u91CD\u542F\u4E4B\u524D\u5FD8\u8BB0\u4FDD\u5B58\u56FE\u7247\u4E86\uFF08sorry\uFF09\u3002\u91CD\u542F\u540E\uFF0C\u91CD\u65B0\u53CC\u51FB\u8FD0\u884C otp_win64_23.0.1.exe \u6587\u4EF6\u5B8C\u6210 Erlang \u5B89\u88C5\u3002",-1),C=n("h3",{id:"_03\u3001\u5B89\u88C5-rabbitmq",tabindex:"-1"},[n("a",{class:"header-anchor",href:"#_03\u3001\u5B89\u88C5-rabbitmq","aria-hidden":"true"},"#"),a(" 03\u3001\u5B89\u88C5 RabbitMQ")],-1),M=n("p",null,"Erlang \u5B89\u88C5\u6210\u529F\u540E\uFF0C\u5C31\u53EF\u4EE5\u5B89\u88C5 RabbitMQ \u4E86\u3002\u4E0B\u8F7D\u5730\u5740\u5982\u4E0B\u6240\u793A\uFF1A",-1),R={href:"https://www.rabbitmq.com/install-windows.html",target:"_blank",rel:"noopener noreferrer"},U=a("https://www.rabbitmq.com/install-windows.html"),S=e(`<p>\u627E\u5230\u4E0B\u56FE\u4E2D\u7684\u4F4D\u7F6E\uFF0C\u9009\u62E9\u7EA2\u8272\u6846\u4E2D\u7684\u6587\u4EF6\u8FDB\u884C\u4E0B\u8F7D\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mq/rabbitmq-rumen-43268557-1240-4ed4-9883-de93668f1f04.jpg" alt=""></p><p>\u5B89\u88C5\u5305\u53EA\u6709 16.5M \u5927\u5C0F\uFF0C\u8FD8\u662F\u975E\u5E38\u8F7B\u91CF\u7EA7\u7684\u3002\u4E0B\u8F7D\u5B8C\u540E\u76F4\u63A5\u53CC\u51FB\u8FD0\u884C exe \u6587\u4EF6\u5C31\u53EF\u4EE5\u50BB\u74DC\u5F0F\u5730\u5B89\u88C5\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mq/rabbitmq-rumen-b3343075-f9a8-441f-b266-0750df82a1c6.jpg" alt=""></p><p>\u5B89\u88C5\u6210\u529F\u540E\uFF0C\u5C31\u53EF\u4EE5\u5C06 RabbitMQ \u4F5C\u4E3A Windows \u670D\u52A1\u542F\u52A8\uFF0C\u53EF\u4EE5\u4ECE\u201C\u5F00\u59CB\u201D\u83DC\u5355\u7BA1\u7406 RabbitMQ Windows \u670D\u52A1\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mq/rabbitmq-rumen-6f185cbd-b3ab-432a-85df-be3a93450533.jpg" alt=""></p><p>\u70B9\u51FB\u300CRabbitMQ Command Prompt (sbin dir)\u300D\uFF0C\u8FDB\u5165\u547D\u4EE4\u884C\uFF0C\u8F93\u5165 <code>rabbitmqctl.bat status</code> \u53EF\u786E\u8BA4 RabbitMQ \u7684\u542F\u52A8\u72B6\u6001\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mq/rabbitmq-rumen-d9407f52-3585-4c3c-af2f-7b7c4ec45461.jpg" alt=""></p><p>\u53EF\u4EE5\u770B\u5230 RabbitMQ \u4E00\u4E9B\u72B6\u6001\u4FE1\u606F\uFF1A</p><ul><li>\u8FDB\u7A0B ID\uFF0C\u4E5F\u5C31\u662F PID \u4E3A 2816</li><li>\u64CD\u4F5C\u7CFB\u7EDF\u4E3A Windows</li><li>\u5F53\u524D\u7684\u7248\u672C\u53F7\u4E3A 3.8.4</li><li>Erlang \u7684\u914D\u7F6E\u4FE1\u606F</li></ul><p>\u547D\u4EE4\u884C\u754C\u9762\u770B\u8D77\u6765\u4E0D\u591F\u4F18\u96C5\uFF0C\u56E0\u6B64\u6211\u4EEC\u53EF\u4EE5\u8F93\u5165\u4EE5\u4E0B\u547D\u4EE4\u6765\u542F\u7528\u5BA2\u6237\u7AEF\u7BA1\u7406 UI \u63D2\u4EF6\uFF1A</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>rabbitmq-plugins enable rabbitmq_management
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>\u770B\u5230\u4EE5\u4E0B\u4FE1\u606F\u5C31\u53EF\u4EE5\u786E\u8BA4\u63D2\u4EF6\u542F\u7528\u6210\u529F\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mq/rabbitmq-rumen-3479f2b1-5089-4d73-a6fa-f673989766b7.jpg" alt=""></p>`,14),F=a("\u5728\u6D4F\u89C8\u5668\u5730\u5740\u680F\u8F93\u5165 "),N={href:"http://localhost:15672/",target:"_blank",rel:"noopener noreferrer"},T=a("http://localhost:15672/"),I=a(" \u53EF\u4EE5\u8FDB\u5165\u7BA1\u7406\u7AEF\u754C\u9762\uFF0C\u5982\u4E0B\u56FE\u6240\u793A\uFF1A"),D=e(`<p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mq/rabbitmq-rumen-cbad5128-e675-4da7-a5dd-fe9bb303f5f0.jpg" alt=""></p><h3 id="_04\u3001\u5728-java-\u4E2D\u4F7F\u7528-rabbitmq" tabindex="-1"><a class="header-anchor" href="#_04\u3001\u5728-java-\u4E2D\u4F7F\u7528-rabbitmq" aria-hidden="true">#</a> 04\u3001\u5728 Java \u4E2D\u4F7F\u7528 RabbitMQ</h3><p>\u6709\u4E9B\u5C0F\u4F19\u4F34\u53EF\u80FD\u4F1A\u95EE\uFF0C\u201C\u4E8C\u54E5\uFF0C\u6211\u662F\u4E00\u540D Java \u7A0B\u5E8F\u5458\uFF0C\u6211\u8BE5\u5982\u4F55\u5728 Java \u4E2D\u4F7F\u7528 RabbitMQ \u5462\uFF1F\u201D\u8FD9\u4E2A\u95EE\u9898\u95EE\u5F97\u597D\uFF0C\u8FD9\u5C31\u6765\uFF0C\u8FD9\u5C31\u6765\u3002</p><p>\u7B2C\u4E00\u6B65\uFF0C\u5728\u9879\u76EE\u4E2D\u6DFB\u52A0 RabbitMQ \u5BA2\u6237\u7AEF\u4F9D\u8D56\uFF1A</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
     &lt;groupId&gt;com.rabbitmq&lt;/groupId&gt;
     &lt;artifactId&gt;amqp-client&lt;/artifactId&gt;
diff --git a/dist/assets/read-csapp.html.23c82cf4.js b/dist/assets/read-csapp.html.23c82cf4.js
deleted file mode 100644
index 568a8219..00000000
--- a/dist/assets/read-csapp.html.23c82cf4.js
+++ /dev/null
@@ -1 +0,0 @@
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diff --git a/dist/assets/read-csapp.html.768012b7.js b/dist/assets/read-csapp.html.768012b7.js
new file mode 100644
index 00000000..5dd32343
--- /dev/null
+++ b/dist/assets/read-csapp.html.768012b7.js
@@ -0,0 +1 @@
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diff --git a/dist/assets/read-csapp.html.c0e758ea.js b/dist/assets/read-csapp.html.c0e758ea.js
new file mode 100644
index 00000000..4ac97306
--- /dev/null
+++ b/dist/assets/read-csapp.html.c0e758ea.js
@@ -0,0 +1 @@
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diff --git a/dist/assets/read-csapp.html.f8f796e3.js b/dist/assets/read-csapp.html.f8f796e3.js
deleted file mode 100644
index 5e927b9f..00000000
--- a/dist/assets/read-csapp.html.f8f796e3.js
+++ /dev/null
@@ -1 +0,0 @@
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index 3f57a5b8..00000000
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similarity index 98%
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alt=""></p><p>\u70B9\u51FB\u300C\u4FE1\u606F\u6821\u9A8C\u300D\uFF0C\u901A\u8FC7\u540E\u8FDB\u5165\u4E0B\u4E00\u6B65\u3002\u5982\u679C\u4E0D\u901A\u8FC7\uFF0C\u6309\u7167\u5BF9\u5E94\u63D0\u793A\u4FE1\u606F\u8FDB\u884C\u4FEE\u6539\uFF0C\u4E00\u822C\u65B0\u6CE8\u518C\u7684\u57DF\u540D\u9700\u8981 3 \u5929\u7684\u5B9E\u540D\u8BA4\u8BC1\u5BA1\u6838\u5468\u671F\u3002</p><p>\u586B\u5199\u4E3B\u529E\u8005\u4FE1\u606F\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-5.png" alt=""></p><p>\u586B\u5199\u7F51\u7AD9\u4FE1\u606F\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-6.png" alt=""></p><p>\u5B8C\u6210\u540E\u4F1A\u63D0\u793A\u6211\u4EEC\u4E0B\u8F7D\u300C\u963F\u91CC\u4E91 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src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-8.png" alt=""></p>',23),m=e("\u73B0\u5728\u7ACB\u523B\u9A6C\u4E0A\uFF0C\u767B\u5F55"),j={href:"http://www.beian.gov.cn/portal/index",target:"_blank",rel:"noopener noreferrer"},g=e("\u5168\u56FD\u4E92\u8054\u7F51\u5B89\u5168\u7BA1\u7406\u5E73\u53F0"),v=e("\u6CE8\u518C\u767B\u5F55\u63D0\u4EA4\u516C\u5B89\u8054\u7F51\u5907\u6848\u7533\u8BF7\u3002"),l=a('<p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-9.png" alt=""></p><p>\u586B\u5199\u7533\u8BF7\u4FE1\u606F\u7684\u65F6\u5019\u6700\u597D\u4E0D\u8981\u7528 Safari \u6D4F\u89C8\u5668\uFF0C\u4E0D\u7136\u4F1A\u63D0\u793A\u8981\u5B89\u88C5 flash \u63D2\u4EF6\uFF08\u679C\u7136\u653F\u4F01\u7F51\u7AD9\u7684\u6280\u672F\u90FD\u975E\u5E38\u5730\u8FFD\u6C42\u7A33\u5B9A\u554A\uFF09\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-10.png" alt=""></p><p>macOS 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diff --git a/dist/assets/record-domain.html.667d7982.js b/dist/assets/record-domain.html.667d7982.js
new file mode 100644
index 00000000..b93d437b
--- /dev/null
+++ b/dist/assets/record-domain.html.667d7982.js
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diff --git a/dist/assets/redis-shuju-yizhixing.html.7e461ea4.js b/dist/assets/redis-shuju-yizhixing.html.480d5fea.js
similarity index 99%
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rename to dist/assets/redis-shuju-yizhixing.html.480d5fea.js
index 77c08c23..e49b9409 100644
--- a/dist/assets/redis-shuju-yizhixing.html.7e461ea4.js
+++ b/dist/assets/redis-shuju-yizhixing.html.480d5fea.js
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-import{_ as r}from"./plugin-vue_export-helper.21dcd24c.js";import{r as a,o,c as n,a as e,b as t,d as i,e as l}from"./app.a0271b9c.js";const d={},h=i("\u6574\u7406\uFF1A\u6C89\u9ED8\u738B\u4E8C\uFF0C\u6233"),c={href:"https://mp.weixin.qq.com/s/RL4Bt_UkNcnsBGL_9w37Zg",target:"_blank",rel:"noopener noreferrer"},p=i("\u8F6C\u8F7D\u94FE\u63A5"),g=i("\uFF0C\u4F5C\u8005\uFF1A\u697C\u4ED4\uFF0C\u6233"),b={href:"https://mp.weixin.qq.com/s/l7v4s1VekIPNi7KZuUgwGQ",target:"_blank",rel:"noopener noreferrer"},m=i("\u539F\u6587\u94FE\u63A5"),u=i("\u3002"),_=l('<p>\u5982\u4F55\u4FDD\u969C MySQL \u548C Redis 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aria-hidden="true">#</a> \u4E0D\u597D\u7684\u65B9\u6848</h2><h3 id="_1-\u5148\u5199-mysql-\u518D\u5199-redis" tabindex="-1"><a class="header-anchor" href="#_1-\u5148\u5199-mysql-\u518D\u5199-redis" aria-hidden="true">#</a> 1. \u5148\u5199 MySQL\uFF0C\u518D\u5199 Redis</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mysql/redis-shuju-yizhixing-9ac6e9ab-dd82-40a5-b71b-836c745ed8ac.png" alt=""></p><blockquote><p>\u56FE\u89E3\u8BF4\u660E\uFF1A</p><ul><li>\u8FD9\u662F\u4E00\u526F\u65F6\u5E8F\u56FE\uFF0C\u63CF\u8FF0\u8BF7\u6C42\u7684\u5148\u540E\u8C03\u7528\u987A\u5E8F\uFF1B</li><li>\u6A58\u9EC4\u8272\u7684\u7EBF\u662F\u8BF7\u6C42 A\uFF0C\u9ED1\u8272\u7684\u7EBF\u662F\u8BF7\u6C42 B\uFF1B</li><li>\u6A58\u9EC4\u8272\u7684\u6587\u5B57\uFF0C\u662F MySQL \u548C Redis \u6700\u7EC8\u4E0D\u4E00\u81F4\u7684\u6570\u636E\uFF1B</li><li>\u6570\u636E\u662F\u4ECE 10 \u66F4\u65B0\u4E3A 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\u5927\u767D\u8BDD\u8BF4\u4E00\u4E0B\uFF0C\u5C31\u662F\u8BFB\u8BF7\u6C42\u4E0D\u4F1A\u66F4\u65B0 Redis\u3002</p><h3 id="_2-\u5148\u5199-redis-\u518D\u5199-mysql" tabindex="-1"><a class="header-anchor" href="#_2-\u5148\u5199-redis-\u518D\u5199-mysql" aria-hidden="true">#</a> 2. \u5148\u5199 Redis\uFF0C\u518D\u5199 MySQL</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mysql/redis-shuju-yizhixing-c50e7ef0-40aa-4931-982a-a9aa31faa6f1.png" alt=""></p><p>\u540C\u201C\u5148\u5199 MySQL\uFF0C\u518D\u5199 Redis\u201D\uFF0C\u770B\u56FE\u53EF\u79D2\u61C2\u3002</p><h3 id="_3-\u5148\u5220\u9664-redis-\u518D\u5199-mysql" tabindex="-1"><a class="header-anchor" href="#_3-\u5148\u5220\u9664-redis-\u518D\u5199-mysql" aria-hidden="true">#</a> 3. \u5148\u5220\u9664 Redis\uFF0C\u518D\u5199 MySQL</h3><p>\u8FD9\u5E45\u56FE\u548C\u4E0A\u9762\u6709\u4E9B\u4E0D\u4E00\u6837\uFF0C\u524D\u9762\u7684\u8BF7\u6C42 A \u548C B \u90FD\u662F\u66F4\u65B0\u8BF7\u6C42\uFF0C\u8FD9\u91CC\u7684\u8BF7\u6C42 A \u662F\u66F4\u65B0\u8BF7\u6C42\uFF0C<strong>\u4F46\u662F\u8BF7\u6C42 B \u662F\u8BFB\u8BF7\u6C42\uFF0C\u4E14\u8BF7\u6C42 B \u7684\u8BFB\u8BF7\u6C42\u4F1A\u56DE\u5199 Redis\u3002</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mysql/redis-shuju-yizhixing-0fec5605-5530-4b12-af0e-2b529c41e6e6.png" alt=""></p><p>\u8BF7\u6C42 A \u5148\u5220\u9664\u7F13\u5B58\uFF0C\u53EF\u80FD\u56E0\u4E3A\u5361\u987F\uFF0C\u6570\u636E\u4E00\u76F4\u6CA1\u6709\u66F4\u65B0\u5230 MySQL\uFF0C\u5BFC\u81F4\u4E24\u8005\u6570\u636E\u4E0D\u4E00\u81F4\u3002</p><p><strong>\u8FD9\u79CD\u60C5\u51B5\u51FA\u73B0\u7684\u6982\u7387\u6BD4\u8F83\u5927\uFF0C\u56E0\u4E3A\u8BF7\u6C42 A \u66F4\u65B0 MySQL \u53EF\u80FD\u8017\u65F6\u4F1A\u6BD4\u8F83\u957F\uFF0C\u800C\u8BF7\u6C42 B \u7684\u524D\u4E24\u6B65\u90FD\u662F\u67E5\u8BE2\uFF0C\u4F1A\u975E\u5E38\u5FEB\u3002</strong></p><h2 id="\u597D\u7684\u65B9\u6848" tabindex="-1"><a class="header-anchor" href="#\u597D\u7684\u65B9\u6848" aria-hidden="true">#</a> \u597D\u7684\u65B9\u6848</h2><h3 id="_4-\u5148\u5220\u9664-redis-\u518D\u5199-mysql-\u518D\u5220\u9664-redis" tabindex="-1"><a class="header-anchor" href="#_4-\u5148\u5220\u9664-redis-\u518D\u5199-mysql-\u518D\u5220\u9664-redis" aria-hidden="true">#</a> 4. \u5148\u5220\u9664 Redis\uFF0C\u518D\u5199 MySQL\uFF0C\u518D\u5220\u9664 Redis</h3><p>\u5BF9\u4E8E\u201C\u5148\u5220\u9664 Redis\uFF0C\u518D\u5199 MySQL\u201D\uFF0C\u5982\u679C\u8981\u89E3\u51B3\u6700\u540E\u7684\u4E0D\u4E00\u81F4\u95EE\u9898\uFF0C\u5176\u5B9E\u518D\u5BF9 Redis \u91CD\u65B0\u5220\u9664\u5373\u53EF\uFF0C<strong>\u8FD9\u4E2A\u4E5F\u662F\u5927\u5BB6\u5E38\u8BF4\u7684\u201C\u7F13\u5B58\u53CC\u5220\u201D\u3002</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mysql/redis-shuju-yizhixing-1fe439cd-83fe-487f-a7ba-578a84839616.png" alt=""></p><p>\u4E3A\u4E86\u4FBF\u4E8E\u5927\u5BB6\u770B\u56FE\uFF0C\u5BF9\u4E8E\u84DD\u8272\u7684\u6587\u5B57\uFF0C\u201C\u5220\u9664\u7F13\u5B58 10\u201D\u5FC5\u987B\u5728\u201C\u56DE\u5199\u7F13\u5B5810\u201D\u540E\u9762\uFF0C\u90A3\u5982\u4F55\u624D\u80FD\u4FDD\u8BC1\u4E00\u5B9A\u662F\u5728\u540E\u9762\u5462\uFF1F<strong>\u7F51\u4E0A\u7ED9\u51FA\u7684\u7B2C\u4E00\u4E2A\u65B9\u6848\u662F\uFF0C\u8BA9\u8BF7\u6C42 A \u7684\u6700\u540E\u4E00\u6B21\u5220\u9664\uFF0C\u7B49\u5F85 500ms\u3002</strong></p><p>\u5BF9\u4E8E\u8FD9\u79CD\u65B9\u6848\uFF0C\u770B\u770B\u5C31\u884C\uFF0C\u53CD\u6B63\u6211\u662F\u4E0D\u4F1A\u7528\uFF0C\u592A Low \u4E86\uFF0C\u98CE\u9669\u4E5F\u4E0D\u53EF\u63A7\u3002</p><p><strong>\u90A3\u6709\u6CA1\u6709\u66F4\u597D\u7684\u65B9\u6848\u5462\uFF0C\u6211\u5EFA\u8BAE\u5F02\u6B65\u4E32\u884C\u5316\u5220\u9664\uFF0C\u5373\u5220\u9664\u8BF7\u6C42\u5165\u961F\u5217</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mysql/redis-shuju-yizhixing-6cb3caf1-c85b-4361-8e29-9e71361fd0c8.png" alt=""></p><p>\u5F02\u6B65\u5220\u9664\u5BF9\u7EBF\u4E0A\u4E1A\u52A1\u65E0\u5F71\u54CD\uFF0C\u4E32\u884C\u5316\u5904\u7406\u4FDD\u969C\u5E76\u53D1\u60C5\u51B5\u4E0B\u6B63\u786E\u5220\u9664\u3002</p><p>\u5982\u679C\u53CC\u5220\u5931\u8D25\u600E\u4E48\u529E\uFF0C\u7F51\u4E0A\u6709\u7ED9 Redis \u52A0\u4E00\u4E2A\u7F13\u5B58\u8FC7\u671F\u65F6\u95F4\u7684\u65B9\u6848\uFF0C\u8FD9\u4E2A\u4E0D\u6562\u82DF\u540C\u3002<strong>\u4E2A\u4EBA\u5EFA\u8BAE\u6574\u4E2A\u91CD\u8BD5\u673A\u5236\uFF0C\u53EF\u4EE5\u501F\u52A9\u6D88\u606F\u961F\u5217\u7684\u91CD\u8BD5\u673A\u5236\uFF0C\u4E5F\u53EF\u4EE5\u81EA\u5DF1\u6574\u4E2A\u8868\uFF0C\u8BB0\u5F55\u91CD\u8BD5\u6B21\u6570</strong>\uFF0C\u65B9\u6CD5\u5F88\u591A\u3002</p><blockquote><p>\u7B80\u5355\u5C0F\u7ED3\u4E00\u4E0B\uFF1A</p><ul><li>\u201C\u7F13\u5B58\u53CC\u5220\u201D\u4E0D\u8981\u7528\u65E0\u8111\u7684 sleep 500 ms\uFF1B</li><li>\u901A\u8FC7\u6D88\u606F\u961F\u5217\u7684\u5F02\u6B65&amp;\u4E32\u884C\uFF0C\u5B9E\u73B0\u6700\u540E\u4E00\u6B21\u7F13\u5B58\u5220\u9664\uFF1B</li><li>\u7F13\u5B58\u5220\u9664\u5931\u8D25\uFF0C\u589E\u52A0\u91CD\u8BD5\u673A\u5236\u3002</li></ul></blockquote><h3 id="_5-\u5148\u5199-mysql-\u518D\u5220\u9664-redis" tabindex="-1"><a class="header-anchor" href="#_5-\u5148\u5199-mysql-\u518D\u5220\u9664-redis" aria-hidden="true">#</a> 5. \u5148\u5199 MySQL\uFF0C\u518D\u5220\u9664 Redis</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mysql/redis-shuju-yizhixing-1f0e26a8-49c3-469e-a193-08f9766943aa.png" alt=""></p><p>\u5BF9\u4E8E\u4E0A\u9762\u8FD9\u79CD\u60C5\u51B5\uFF0C\u5BF9\u4E8E\u7B2C\u4E00\u6B21\u67E5\u8BE2\uFF0C\u8BF7\u6C42 B \u67E5\u8BE2\u7684\u6570\u636E\u662F 10\uFF0C\u4F46\u662F MySQL \u7684\u6570\u636E\u662F 11\uFF0C<strong>\u53EA\u5B58\u5728\u8FD9\u4E00\u6B21\u4E0D\u4E00\u81F4\u7684\u60C5\u51B5\uFF0C\u5BF9\u4E8E\u4E0D\u662F\u5F3A\u4E00\u81F4\u6027\u8981\u6C42\u7684\u4E1A\u52A1\uFF0C\u53EF\u4EE5\u5BB9\u5FCD\u3002</strong>\uFF08\u90A3\u4EC0\u4E48\u60C5\u51B5\u4E0B\u4E0D\u80FD\u5BB9\u5FCD\u5462\uFF0C\u6BD4\u5982\u79D2\u6740\u4E1A\u52A1\u3001\u5E93\u5B58\u670D\u52A1\u7B49\u3002\uFF09</p><p>\u5F53\u8BF7\u6C42 B \u8FDB\u884C\u7B2C\u4E8C\u6B21\u67E5\u8BE2\u65F6\uFF0C\u56E0\u4E3A\u6CA1\u6709\u547D\u4E2D Redis\uFF0C\u4F1A\u91CD\u65B0\u67E5\u4E00\u6B21 DB\uFF0C\u7136\u540E\u518D\u56DE\u5199\u5230 Reids\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mysql/redis-shuju-yizhixing-268696d3-a7e9-4762-9fe6-283859d5b0ba.png" alt=""></p><p>\u8FD9\u91CC\u9700\u8981\u6EE1\u8DB3 2 \u4E2A\u6761\u4EF6\uFF1A</p><ul><li>\u7F13\u5B58\u521A\u597D\u81EA\u52A8\u5931\u6548\uFF1B</li><li>\u8BF7\u6C42 B \u4ECE\u6570\u636E\u5E93\u67E5\u51FA 10\uFF0C\u56DE\u5199\u7F13\u5B58\u7684\u8017\u65F6\uFF0C\u6BD4\u8BF7\u6C42 A \u5199\u6570\u636E\u5E93\uFF0C\u5E76\u4E14\u5220\u9664\u7F13\u5B58\u7684\u8FD8\u957F\u3002</li></ul><p>\u5BF9\u4E8E\u7B2C\u4E8C\u4E2A\u6761\u4EF6\uFF0C\u6211\u4EEC\u90FD\u77E5\u9053\u66F4\u65B0 DB \u80AF\u5B9A\u6BD4\u67E5\u8BE2\u8017\u65F6\u8981\u957F\uFF0C\u6240\u4EE5\u51FA\u73B0\u8FD9\u4E2A\u60C5\u51B5\u7684\u6982\u7387\u5F88\u5C0F\uFF0C\u540C\u65F6\u6EE1\u8DB3\u4E0A\u8FF0\u6761\u4EF6\u7684\u60C5\u51B5\u66F4\u5C0F\u3002</p><h3 id="_6-\u5148\u5199-mysql-\u901A\u8FC7-binlog-\u5F02\u6B65\u66F4\u65B0-redis" tabindex="-1"><a class="header-anchor" href="#_6-\u5148\u5199-mysql-\u901A\u8FC7-binlog-\u5F02\u6B65\u66F4\u65B0-redis" aria-hidden="true">#</a> 6. \u5148\u5199 MySQL\uFF0C\u901A\u8FC7 Binlog\uFF0C\u5F02\u6B65\u66F4\u65B0 Redis</h3><p>\u8FD9\u79CD\u65B9\u6848\uFF0C\u4E3B\u8981\u662F\u76D1\u542C MySQL \u7684 Binlog\uFF0C\u7136\u540E\u901A\u8FC7\u5F02\u6B65\u7684\u65B9\u5F0F\uFF0C\u5C06\u6570\u636E\u66F4\u65B0\u5230 Redis\uFF0C\u8FD9\u79CD\u65B9\u6848\u6709\u4E2A\u524D\u63D0\uFF0C\u67E5\u8BE2\u7684\u8BF7\u6C42\uFF0C\u4E0D\u4F1A\u56DE\u5199 Redis\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mysql/redis-shuju-yizhixing-0da55874-8cf7-4c5a-995b-a0e6611bfac2.png" alt=""></p><p>\u8FD9\u4E2A\u65B9\u6848\uFF0C\u4F1A\u4FDD\u8BC1 MySQL \u548C Redis \u7684\u6700\u7EC8\u4E00\u81F4\u6027\uFF0C\u4F46\u662F\u5982\u679C\u4E2D\u9014\u8BF7\u6C42 B \u9700\u8981\u67E5\u8BE2\u6570\u636E\uFF0C\u5982\u679C\u7F13\u5B58\u65E0\u6570\u636E\uFF0C\u5C31\u76F4\u63A5\u67E5 DB\uFF1B\u5982\u679C\u7F13\u5B58\u6709\u6570\u636E\uFF0C\u67E5\u8BE2\u7684\u6570\u636E\u4E5F\u4F1A\u5B58\u5728\u4E0D\u4E00\u81F4\u7684\u60C5\u51B5\u3002</p><p><strong>\u6240\u4EE5\u8FD9\u4E2A\u65B9\u6848\uFF0C\u662F\u5B9E\u73B0\u6700\u7EC8\u4E00\u81F4\u6027\u7684\u7EC8\u6781\u89E3\u51B3\u65B9\u6848\uFF0C\u4F46\u662F\u4E0D\u80FD\u4FDD\u8BC1\u5B9E\u65F6\u6027\u3002</strong></p><h2 id="\u51E0\u79CD\u65B9\u6848\u6BD4\u8F83" tabindex="-1"><a class="header-anchor" href="#\u51E0\u79CD\u65B9\u6848\u6BD4\u8F83" aria-hidden="true">#</a> \u51E0\u79CD\u65B9\u6848\u6BD4\u8F83</h2><p>\u6211\u4EEC\u5BF9\u6BD4\u4E0A\u9762\u8BA8\u8BBA\u7684 6 \u79CD\u65B9\u6848\uFF1A</p><ol><li>\u5148\u5199 Redis\uFF0C\u518D\u5199 MySQL</li></ol><ul><li><strong>\u8FD9\u79CD\u65B9\u6848\uFF0C\u6211\u80AF\u5B9A\u4E0D\u4F1A\u7528</strong>\uFF0C\u4E07\u4E00 DB \u6302\u4E86\uFF0C\u4F60\u628A\u6570\u636E\u5199\u5230\u7F13\u5B58\uFF0CDB \u65E0\u6570\u636E\uFF0C\u8FD9\u4E2A\u662F\u707E\u96BE\u6027\u7684\uFF1B</li><li>\u6211\u4E4B\u524D\u4E5F\u89C1\u540C\u5B66\u8FD9\u4E48\u7528\u8FC7\uFF0C\u5982\u679C\u5199 DB \u5931\u8D25\uFF0C\u5BF9 Redis \u8FDB\u884C\u9006\u64CD\u4F5C\uFF0C\u90A3\u5982\u679C\u9006\u64CD\u4F5C\u5931\u8D25\u5462\uFF0C\u662F\u4E0D\u662F\u8FD8\u8981\u641E\u4E2A\u91CD\u8BD5\uFF1F</li></ul><ol start="2"><li>\u5148\u5199 MySQL\uFF0C\u518D\u5199 Redis</li></ol><ul><li><strong>\u5BF9\u4E8E\u5E76\u53D1\u91CF\u3001\u4E00\u81F4\u6027\u8981\u6C42\u4E0D\u9AD8\u7684\u9879\u76EE\uFF0C\u5F88\u591A\u5C31\u662F\u8FD9\u4E48\u7528\u7684</strong>\uFF0C\u6211\u4E4B\u524D\u4E5F\u7ECF\u5E38\u8FD9\u4E48\u641E\uFF0C\u4F46\u662F\u4E0D\u5EFA\u8BAE\u8FD9\u4E48\u505A\uFF1B</li><li>\u5F53 Redis \u77AC\u95F4\u4E0D\u53EF\u7528\u7684\u60C5\u51B5\uFF0C\u9700\u8981\u62A5\u8B66\u51FA\u6765\uFF0C\u7136\u540E\u7EBF\u4E0B\u5904\u7406\u3002</li></ul><ol start="3"><li>\u5148\u5220\u9664 Redis\uFF0C\u518D\u5199 MySQL</li></ol><ul><li>\u8FD9\u79CD\u65B9\u5F0F\uFF0C\u6211\u8FD8\u771F\u6CA1\u7528\u8FC7\uFF0C<strong>\u76F4\u63A5\u5FFD\u7565\u5427\u3002</strong></li></ul><ol start="4"><li>\u5148\u5220\u9664 Redis\uFF0C\u518D\u5199 MySQL\uFF0C\u518D\u5220\u9664 Redis</li></ol><ul><li>\u8FD9\u79CD\u65B9\u5F0F\u867D\u7136\u53EF\u884C\uFF0C\u4F46\u662F<strong>\u611F\u89C9\u597D\u590D\u6742</strong>\uFF0C\u8FD8\u8981\u641E\u4E2A\u6D88\u606F\u961F\u5217\u53BB\u5F02\u6B65\u5220\u9664 Redis\u3002</li></ul><ol start="5"><li>\u5148\u5199 MySQL\uFF0C\u518D\u5220\u9664 Redis</li></ol><ul><li><strong>\u6BD4\u8F83\u63A8\u8350\u8FD9\u79CD\u65B9\u5F0F</strong>\uFF0C\u5220\u9664 Redis \u5982\u679C\u5931\u8D25\uFF0C\u53EF\u4EE5\u518D\u591A\u91CD\u8BD5\u51E0\u6B21\uFF0C\u5426\u5219\u62A5\u8B66\u51FA\u6765\uFF1B</li><li>\u8FD9\u4E2A\u65B9\u6848\uFF0C\u662F\u5B9E\u65F6\u6027\u4E2D\u6700\u597D\u7684\u65B9\u6848\uFF0C\u5728\u4E00\u4E9B\u9AD8\u5E76\u53D1\u573A\u666F\u4E2D\uFF0C\u63A8\u8350\u8FD9\u79CD\u3002</li></ul><ol start="6"><li>\u5148\u5199 MySQL\uFF0C\u901A\u8FC7 Binlog\uFF0C\u5F02\u6B65\u66F4\u65B0 Redis</li></ol><ul><li><strong>\u5BF9\u4E8E\u5F02\u5730\u5BB9\u707E\u3001\u6570\u636E\u6C47\u603B\u7B49\uFF0C\u5EFA\u8BAE\u4F1A\u7528\u8FD9\u79CD\u65B9\u5F0F</strong>\uFF0C\u6BD4\u5982 binlog + kafka\uFF0C\u6570\u636E\u7684\u4E00\u81F4\u6027\u4E5F\u53EF\u4EE5\u8FBE\u5230\u79D2\u7EA7\uFF1B</li><li>\u7EAF\u7CB9\u7684\u9AD8\u5E76\u53D1\u573A\u666F\uFF0C\u4E0D\u5EFA\u8BAE\u7528\u8FD9\u79CD\u65B9\u6848\uFF0C\u6BD4\u5982\u62A2\u8D2D\u3001\u79D2\u6740\u7B49\u3002</li></ul><p><strong>\u4E2A\u4EBA\u7ED3\u8BBA\uFF1A</strong></p><ul><li><strong>\u5B9E\u65F6\u4E00\u81F4\u6027\u65B9\u6848</strong>\uFF1A\u91C7\u7528\u201C\u5148\u5199 MySQL\uFF0C\u518D\u5220\u9664 Redis\u201D\u7684\u7B56\u7565\uFF0C\u8FD9\u79CD\u60C5\u51B5\u867D\u7136\u4E5F\u4F1A\u5B58\u5728\u4E24\u8005\u4E0D\u4E00\u81F4\uFF0C\u4F46\u662F\u9700\u8981\u6EE1\u8DB3\u7684\u6761\u4EF6\u6709\u70B9\u82DB\u523B\uFF0C<strong>\u6240\u4EE5\u662F\u6EE1\u8DB3\u5B9E\u65F6\u6027\u6761\u4EF6\u4E0B\uFF0C\u80FD\u5C3D\u91CF\u6EE1\u8DB3\u4E00\u81F4\u6027\u7684\u6700\u4F18\u89E3\u3002</strong></li><li><strong>\u6700\u7EC8\u4E00\u81F4\u6027\u65B9\u6848</strong>\uFF1A\u91C7\u7528\u201C\u5148\u5199 MySQL\uFF0C\u901A\u8FC7 Binlog\uFF0C\u5F02\u6B65\u66F4\u65B0 Redis\u201D\uFF0C\u53EF\u4EE5\u901A\u8FC7 Binlog\uFF0C\u7ED3\u5408\u6D88\u606F\u961F\u5217\u5F02\u6B65\u66F4\u65B0 Redis\uFF0C<strong>\u662F\u6700\u7EC8\u4E00\u81F4\u6027\u7684\u6700\u4F18\u89E3\u3002</strong></li></ul><hr>',59),y=i("\u6574\u7406\uFF1A\u6C89\u9ED8\u738B\u4E8C\uFF0C\u6233"),f={href:"https://mp.weixin.qq.com/s/RL4Bt_UkNcnsBGL_9w37Zg",target:"_blank",rel:"noopener noreferrer"},R=i("\u8F6C\u8F7D\u94FE\u63A5"),q=i("\uFF0C\u4F5C\u8005\uFF1A\u697C\u4ED4\uFF0C\u6233"),j={href:"https://mp.weixin.qq.com/s/l7v4s1VekIPNi7KZuUgwGQ",target:"_blank",rel:"noopener noreferrer"},x=i("\u539F\u6587\u94FE\u63A5"),L=i("\u3002"),B=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png",alt:""})],-1);function v(Q,S){const s=a("ExternalLinkIcon");return o(),n("div",null,[e("blockquote",null,[e("p",null,[h,e("a",c,[p,t(s)]),g,e("a",b,[m,t(s)]),u])]),_,e("blockquote",null,[e("p",null,[y,e("a",f,[R,t(s)]),q,e("a",j,[x,t(s)]),L])]),B])}var z=r(d,[["render",v],["__file","redis-shuju-yizhixing.html.vue"]]);export{z as default};
+import{_ as r}from"./plugin-vue_export-helper.21dcd24c.js";import{r as a,o,c as n,a as e,b as t,d as i,e as l}from"./app.615e41d8.js";const d={},h=i("\u6574\u7406\uFF1A\u6C89\u9ED8\u738B\u4E8C\uFF0C\u6233"),c={href:"https://mp.weixin.qq.com/s/RL4Bt_UkNcnsBGL_9w37Zg",target:"_blank",rel:"noopener noreferrer"},p=i("\u8F6C\u8F7D\u94FE\u63A5"),g=i("\uFF0C\u4F5C\u8005\uFF1A\u697C\u4ED4\uFF0C\u6233"),b={href:"https://mp.weixin.qq.com/s/l7v4s1VekIPNi7KZuUgwGQ",target:"_blank",rel:"noopener noreferrer"},m=i("\u539F\u6587\u94FE\u63A5"),u=i("\u3002"),_=l('<p>\u5982\u4F55\u4FDD\u969C MySQL \u548C Redis \u7684\u6570\u636E\u4E00\u81F4\u6027\uFF1F\u8FD9\u4E2A\u95EE\u9898\u5F88\u65E9\u4E4B\u524D\u6211\u5C31\u9047\u5230\u8FC7\uFF0C\u4F46\u662F\u4E00\u76F4\u6CA1\u6709\u4ED4\u7EC6\u53BB\u7814\u7A76\uFF0C\u4E0A\u4E2A\u6708\u770B\u4E86\u6781\u5BA2\u7684\u8BFE\u7A0B\uFF0C\u6709\u4E00\u7BC7\u6587\u7AE0\u4E13\u95E8\u6709\u8FC7\u8BB2\u89E3\uFF0C\u521A\u597D\u6709\u7C89\u4E1D\u4E5F\u95EE\u6211\u8FD9\u4E2A\u95EE\u9898\uFF0C\u6240\u4EE5\u611F\u89C9\u6709\u5FC5\u8981\u5355\u72EC\u51FA\u4E00\u7BC7\u3002</p><p><strong>\u4E4B\u524D\u4E5F\u770B\u4E86\u5F88\u591A\u76F8\u5173\u7684\u6587\u7AE0\uFF0C\u4F46\u662F\u611F\u89C9\u8BB2\u7684\u90FD\u4E0D\u597D</strong>\uFF0C\u5F88\u591A\u6587\u7AE0\u90FD\u4F1A\u53BB\u8BB2\u5404\u79CD\u7B56\u7565\uFF0C\u6BD4\u5982\uFF08\u65C1\u8DEF\u7F13\u5B58\uFF09\u7B56\u7565\u3001\uFF08\u8BFB\u7A7F / \u5199\u7A7F\uFF09\u7B56\u7565\u548C\uFF08\u5199\u56DE\uFF09\u7B56\u7565\u7B49\uFF0C\u611F\u89C9\u610F\u4E49\u771F\u7684\u4E0D\u5927\uFF0C\u7136\u540E\u6709\u7684\u6587\u7AE0\u4E5F\u53EA\u8BB2\u4E86\u90E8\u5206\u60C5\u51B5\uFF0C\u4E5F\u6CA1\u6709\u544A\u8BC9\u6700\u4F18\u89E3\u3002</p><p>\u6211\u76F4\u63A5\u5148\u629B\u4E00\u4E0B\u7ED3\u8BBA\uFF1A<strong>\u5728\u6EE1\u8DB3\u5B9E\u65F6\u6027\u7684\u6761\u4EF6\u4E0B\uFF0C\u4E0D\u5B58\u5728\u4E24\u8005\u5B8C\u5168\u4FDD\u5B58\u4E00\u81F4\u7684\u65B9\u6848\uFF0C\u53EA\u6709\u6700\u7EC8\u4E00\u81F4\u6027\u65B9\u6848\u3002</strong> \u6839\u636E\u7F51\u4E0A\u7684\u4F17\u591A\u89E3\u51B3\u65B9\u6848\uFF0C\u603B\u7ED3\u51FA 6 \u79CD\uFF0C\u76F4\u63A5\u770B\u76EE\u5F55\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mysql/redis-shuju-yizhixing-537a505f-1f3f-4f23-b5e3-209c8c8a9281.png" alt=""></p><h2 id="\u4E0D\u597D\u7684\u65B9\u6848" tabindex="-1"><a class="header-anchor" href="#\u4E0D\u597D\u7684\u65B9\u6848" aria-hidden="true">#</a> \u4E0D\u597D\u7684\u65B9\u6848</h2><h3 id="_1-\u5148\u5199-mysql-\u518D\u5199-redis" tabindex="-1"><a class="header-anchor" href="#_1-\u5148\u5199-mysql-\u518D\u5199-redis" aria-hidden="true">#</a> 1. \u5148\u5199 MySQL\uFF0C\u518D\u5199 Redis</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mysql/redis-shuju-yizhixing-9ac6e9ab-dd82-40a5-b71b-836c745ed8ac.png" alt=""></p><blockquote><p>\u56FE\u89E3\u8BF4\u660E\uFF1A</p><ul><li>\u8FD9\u662F\u4E00\u526F\u65F6\u5E8F\u56FE\uFF0C\u63CF\u8FF0\u8BF7\u6C42\u7684\u5148\u540E\u8C03\u7528\u987A\u5E8F\uFF1B</li><li>\u6A58\u9EC4\u8272\u7684\u7EBF\u662F\u8BF7\u6C42 A\uFF0C\u9ED1\u8272\u7684\u7EBF\u662F\u8BF7\u6C42 B\uFF1B</li><li>\u6A58\u9EC4\u8272\u7684\u6587\u5B57\uFF0C\u662F MySQL \u548C Redis \u6700\u7EC8\u4E0D\u4E00\u81F4\u7684\u6570\u636E\uFF1B</li><li>\u6570\u636E\u662F\u4ECE 10 \u66F4\u65B0\u4E3A 11\uFF1B</li><li>\u540E\u9762\u6240\u6709\u7684\u56FE\uFF0C\u90FD\u662F\u8FD9\u4E2A\u542B\u4E49\uFF0C\u4E0D\u518D\u8D58\u8FF0\u3002</li></ul></blockquote><p>\u8BF7\u6C42 A\u3001B \u90FD\u662F\u5148\u5199 MySQL\uFF0C\u7136\u540E\u518D\u5199 Redis\uFF0C\u5728\u9AD8\u5E76\u53D1\u60C5\u51B5\u4E0B\uFF0C\u5982\u679C\u8BF7\u6C42 A \u5728\u5199 Redis \u65F6\u5361\u4E86\u4E00\u4F1A\uFF0C\u8BF7\u6C42 B \u5DF2\u7ECF\u4F9D\u6B21\u5B8C\u6210\u6570\u636E\u7684\u66F4\u65B0\uFF0C\u5C31\u4F1A\u51FA\u73B0\u56FE\u4E2D\u7684\u95EE\u9898\u3002</p><p>\u8FD9\u4E2A\u56FE\u5DF2\u7ECF\u753B\u7684\u5F88\u6E05\u6670\u4E86\uFF0C\u6211\u5C31\u4E0D\u7528\u518D\u53BB\u5570\u55E6\u4E86\u5427\uFF0C<strong>\u4E0D\u8FC7\u8FD9\u91CC\u6709\u4E2A\u524D\u63D0\uFF0C\u5C31\u662F\u5BF9\u4E8E\u8BFB\u8BF7\u6C42\uFF0C\u5148\u53BB\u8BFB Redis\uFF0C\u5982\u679C\u6CA1\u6709\uFF0C\u518D\u53BB\u8BFB DB\uFF0C\u4F46\u662F\u8BFB\u8BF7\u6C42\u4E0D\u4F1A\u518D\u56DE\u5199 Redis\u3002</strong> \u5927\u767D\u8BDD\u8BF4\u4E00\u4E0B\uFF0C\u5C31\u662F\u8BFB\u8BF7\u6C42\u4E0D\u4F1A\u66F4\u65B0 Redis\u3002</p><h3 id="_2-\u5148\u5199-redis-\u518D\u5199-mysql" tabindex="-1"><a class="header-anchor" href="#_2-\u5148\u5199-redis-\u518D\u5199-mysql" aria-hidden="true">#</a> 2. \u5148\u5199 Redis\uFF0C\u518D\u5199 MySQL</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mysql/redis-shuju-yizhixing-c50e7ef0-40aa-4931-982a-a9aa31faa6f1.png" alt=""></p><p>\u540C\u201C\u5148\u5199 MySQL\uFF0C\u518D\u5199 Redis\u201D\uFF0C\u770B\u56FE\u53EF\u79D2\u61C2\u3002</p><h3 id="_3-\u5148\u5220\u9664-redis-\u518D\u5199-mysql" tabindex="-1"><a class="header-anchor" href="#_3-\u5148\u5220\u9664-redis-\u518D\u5199-mysql" aria-hidden="true">#</a> 3. \u5148\u5220\u9664 Redis\uFF0C\u518D\u5199 MySQL</h3><p>\u8FD9\u5E45\u56FE\u548C\u4E0A\u9762\u6709\u4E9B\u4E0D\u4E00\u6837\uFF0C\u524D\u9762\u7684\u8BF7\u6C42 A \u548C B \u90FD\u662F\u66F4\u65B0\u8BF7\u6C42\uFF0C\u8FD9\u91CC\u7684\u8BF7\u6C42 A \u662F\u66F4\u65B0\u8BF7\u6C42\uFF0C<strong>\u4F46\u662F\u8BF7\u6C42 B \u662F\u8BFB\u8BF7\u6C42\uFF0C\u4E14\u8BF7\u6C42 B \u7684\u8BFB\u8BF7\u6C42\u4F1A\u56DE\u5199 Redis\u3002</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mysql/redis-shuju-yizhixing-0fec5605-5530-4b12-af0e-2b529c41e6e6.png" alt=""></p><p>\u8BF7\u6C42 A \u5148\u5220\u9664\u7F13\u5B58\uFF0C\u53EF\u80FD\u56E0\u4E3A\u5361\u987F\uFF0C\u6570\u636E\u4E00\u76F4\u6CA1\u6709\u66F4\u65B0\u5230 MySQL\uFF0C\u5BFC\u81F4\u4E24\u8005\u6570\u636E\u4E0D\u4E00\u81F4\u3002</p><p><strong>\u8FD9\u79CD\u60C5\u51B5\u51FA\u73B0\u7684\u6982\u7387\u6BD4\u8F83\u5927\uFF0C\u56E0\u4E3A\u8BF7\u6C42 A \u66F4\u65B0 MySQL \u53EF\u80FD\u8017\u65F6\u4F1A\u6BD4\u8F83\u957F\uFF0C\u800C\u8BF7\u6C42 B \u7684\u524D\u4E24\u6B65\u90FD\u662F\u67E5\u8BE2\uFF0C\u4F1A\u975E\u5E38\u5FEB\u3002</strong></p><h2 id="\u597D\u7684\u65B9\u6848" tabindex="-1"><a class="header-anchor" href="#\u597D\u7684\u65B9\u6848" aria-hidden="true">#</a> \u597D\u7684\u65B9\u6848</h2><h3 id="_4-\u5148\u5220\u9664-redis-\u518D\u5199-mysql-\u518D\u5220\u9664-redis" tabindex="-1"><a class="header-anchor" href="#_4-\u5148\u5220\u9664-redis-\u518D\u5199-mysql-\u518D\u5220\u9664-redis" aria-hidden="true">#</a> 4. \u5148\u5220\u9664 Redis\uFF0C\u518D\u5199 MySQL\uFF0C\u518D\u5220\u9664 Redis</h3><p>\u5BF9\u4E8E\u201C\u5148\u5220\u9664 Redis\uFF0C\u518D\u5199 MySQL\u201D\uFF0C\u5982\u679C\u8981\u89E3\u51B3\u6700\u540E\u7684\u4E0D\u4E00\u81F4\u95EE\u9898\uFF0C\u5176\u5B9E\u518D\u5BF9 Redis \u91CD\u65B0\u5220\u9664\u5373\u53EF\uFF0C<strong>\u8FD9\u4E2A\u4E5F\u662F\u5927\u5BB6\u5E38\u8BF4\u7684\u201C\u7F13\u5B58\u53CC\u5220\u201D\u3002</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mysql/redis-shuju-yizhixing-1fe439cd-83fe-487f-a7ba-578a84839616.png" alt=""></p><p>\u4E3A\u4E86\u4FBF\u4E8E\u5927\u5BB6\u770B\u56FE\uFF0C\u5BF9\u4E8E\u84DD\u8272\u7684\u6587\u5B57\uFF0C\u201C\u5220\u9664\u7F13\u5B58 10\u201D\u5FC5\u987B\u5728\u201C\u56DE\u5199\u7F13\u5B5810\u201D\u540E\u9762\uFF0C\u90A3\u5982\u4F55\u624D\u80FD\u4FDD\u8BC1\u4E00\u5B9A\u662F\u5728\u540E\u9762\u5462\uFF1F<strong>\u7F51\u4E0A\u7ED9\u51FA\u7684\u7B2C\u4E00\u4E2A\u65B9\u6848\u662F\uFF0C\u8BA9\u8BF7\u6C42 A \u7684\u6700\u540E\u4E00\u6B21\u5220\u9664\uFF0C\u7B49\u5F85 500ms\u3002</strong></p><p>\u5BF9\u4E8E\u8FD9\u79CD\u65B9\u6848\uFF0C\u770B\u770B\u5C31\u884C\uFF0C\u53CD\u6B63\u6211\u662F\u4E0D\u4F1A\u7528\uFF0C\u592A Low \u4E86\uFF0C\u98CE\u9669\u4E5F\u4E0D\u53EF\u63A7\u3002</p><p><strong>\u90A3\u6709\u6CA1\u6709\u66F4\u597D\u7684\u65B9\u6848\u5462\uFF0C\u6211\u5EFA\u8BAE\u5F02\u6B65\u4E32\u884C\u5316\u5220\u9664\uFF0C\u5373\u5220\u9664\u8BF7\u6C42\u5165\u961F\u5217</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mysql/redis-shuju-yizhixing-6cb3caf1-c85b-4361-8e29-9e71361fd0c8.png" alt=""></p><p>\u5F02\u6B65\u5220\u9664\u5BF9\u7EBF\u4E0A\u4E1A\u52A1\u65E0\u5F71\u54CD\uFF0C\u4E32\u884C\u5316\u5904\u7406\u4FDD\u969C\u5E76\u53D1\u60C5\u51B5\u4E0B\u6B63\u786E\u5220\u9664\u3002</p><p>\u5982\u679C\u53CC\u5220\u5931\u8D25\u600E\u4E48\u529E\uFF0C\u7F51\u4E0A\u6709\u7ED9 Redis \u52A0\u4E00\u4E2A\u7F13\u5B58\u8FC7\u671F\u65F6\u95F4\u7684\u65B9\u6848\uFF0C\u8FD9\u4E2A\u4E0D\u6562\u82DF\u540C\u3002<strong>\u4E2A\u4EBA\u5EFA\u8BAE\u6574\u4E2A\u91CD\u8BD5\u673A\u5236\uFF0C\u53EF\u4EE5\u501F\u52A9\u6D88\u606F\u961F\u5217\u7684\u91CD\u8BD5\u673A\u5236\uFF0C\u4E5F\u53EF\u4EE5\u81EA\u5DF1\u6574\u4E2A\u8868\uFF0C\u8BB0\u5F55\u91CD\u8BD5\u6B21\u6570</strong>\uFF0C\u65B9\u6CD5\u5F88\u591A\u3002</p><blockquote><p>\u7B80\u5355\u5C0F\u7ED3\u4E00\u4E0B\uFF1A</p><ul><li>\u201C\u7F13\u5B58\u53CC\u5220\u201D\u4E0D\u8981\u7528\u65E0\u8111\u7684 sleep 500 ms\uFF1B</li><li>\u901A\u8FC7\u6D88\u606F\u961F\u5217\u7684\u5F02\u6B65&amp;\u4E32\u884C\uFF0C\u5B9E\u73B0\u6700\u540E\u4E00\u6B21\u7F13\u5B58\u5220\u9664\uFF1B</li><li>\u7F13\u5B58\u5220\u9664\u5931\u8D25\uFF0C\u589E\u52A0\u91CD\u8BD5\u673A\u5236\u3002</li></ul></blockquote><h3 id="_5-\u5148\u5199-mysql-\u518D\u5220\u9664-redis" tabindex="-1"><a class="header-anchor" href="#_5-\u5148\u5199-mysql-\u518D\u5220\u9664-redis" aria-hidden="true">#</a> 5. \u5148\u5199 MySQL\uFF0C\u518D\u5220\u9664 Redis</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mysql/redis-shuju-yizhixing-1f0e26a8-49c3-469e-a193-08f9766943aa.png" alt=""></p><p>\u5BF9\u4E8E\u4E0A\u9762\u8FD9\u79CD\u60C5\u51B5\uFF0C\u5BF9\u4E8E\u7B2C\u4E00\u6B21\u67E5\u8BE2\uFF0C\u8BF7\u6C42 B \u67E5\u8BE2\u7684\u6570\u636E\u662F 10\uFF0C\u4F46\u662F MySQL \u7684\u6570\u636E\u662F 11\uFF0C<strong>\u53EA\u5B58\u5728\u8FD9\u4E00\u6B21\u4E0D\u4E00\u81F4\u7684\u60C5\u51B5\uFF0C\u5BF9\u4E8E\u4E0D\u662F\u5F3A\u4E00\u81F4\u6027\u8981\u6C42\u7684\u4E1A\u52A1\uFF0C\u53EF\u4EE5\u5BB9\u5FCD\u3002</strong>\uFF08\u90A3\u4EC0\u4E48\u60C5\u51B5\u4E0B\u4E0D\u80FD\u5BB9\u5FCD\u5462\uFF0C\u6BD4\u5982\u79D2\u6740\u4E1A\u52A1\u3001\u5E93\u5B58\u670D\u52A1\u7B49\u3002\uFF09</p><p>\u5F53\u8BF7\u6C42 B \u8FDB\u884C\u7B2C\u4E8C\u6B21\u67E5\u8BE2\u65F6\uFF0C\u56E0\u4E3A\u6CA1\u6709\u547D\u4E2D Redis\uFF0C\u4F1A\u91CD\u65B0\u67E5\u4E00\u6B21 DB\uFF0C\u7136\u540E\u518D\u56DE\u5199\u5230 Reids\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mysql/redis-shuju-yizhixing-268696d3-a7e9-4762-9fe6-283859d5b0ba.png" alt=""></p><p>\u8FD9\u91CC\u9700\u8981\u6EE1\u8DB3 2 \u4E2A\u6761\u4EF6\uFF1A</p><ul><li>\u7F13\u5B58\u521A\u597D\u81EA\u52A8\u5931\u6548\uFF1B</li><li>\u8BF7\u6C42 B \u4ECE\u6570\u636E\u5E93\u67E5\u51FA 10\uFF0C\u56DE\u5199\u7F13\u5B58\u7684\u8017\u65F6\uFF0C\u6BD4\u8BF7\u6C42 A \u5199\u6570\u636E\u5E93\uFF0C\u5E76\u4E14\u5220\u9664\u7F13\u5B58\u7684\u8FD8\u957F\u3002</li></ul><p>\u5BF9\u4E8E\u7B2C\u4E8C\u4E2A\u6761\u4EF6\uFF0C\u6211\u4EEC\u90FD\u77E5\u9053\u66F4\u65B0 DB \u80AF\u5B9A\u6BD4\u67E5\u8BE2\u8017\u65F6\u8981\u957F\uFF0C\u6240\u4EE5\u51FA\u73B0\u8FD9\u4E2A\u60C5\u51B5\u7684\u6982\u7387\u5F88\u5C0F\uFF0C\u540C\u65F6\u6EE1\u8DB3\u4E0A\u8FF0\u6761\u4EF6\u7684\u60C5\u51B5\u66F4\u5C0F\u3002</p><h3 id="_6-\u5148\u5199-mysql-\u901A\u8FC7-binlog-\u5F02\u6B65\u66F4\u65B0-redis" tabindex="-1"><a class="header-anchor" href="#_6-\u5148\u5199-mysql-\u901A\u8FC7-binlog-\u5F02\u6B65\u66F4\u65B0-redis" aria-hidden="true">#</a> 6. \u5148\u5199 MySQL\uFF0C\u901A\u8FC7 Binlog\uFF0C\u5F02\u6B65\u66F4\u65B0 Redis</h3><p>\u8FD9\u79CD\u65B9\u6848\uFF0C\u4E3B\u8981\u662F\u76D1\u542C MySQL \u7684 Binlog\uFF0C\u7136\u540E\u901A\u8FC7\u5F02\u6B65\u7684\u65B9\u5F0F\uFF0C\u5C06\u6570\u636E\u66F4\u65B0\u5230 Redis\uFF0C\u8FD9\u79CD\u65B9\u6848\u6709\u4E2A\u524D\u63D0\uFF0C\u67E5\u8BE2\u7684\u8BF7\u6C42\uFF0C\u4E0D\u4F1A\u56DE\u5199 Redis\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mysql/redis-shuju-yizhixing-0da55874-8cf7-4c5a-995b-a0e6611bfac2.png" alt=""></p><p>\u8FD9\u4E2A\u65B9\u6848\uFF0C\u4F1A\u4FDD\u8BC1 MySQL \u548C Redis \u7684\u6700\u7EC8\u4E00\u81F4\u6027\uFF0C\u4F46\u662F\u5982\u679C\u4E2D\u9014\u8BF7\u6C42 B \u9700\u8981\u67E5\u8BE2\u6570\u636E\uFF0C\u5982\u679C\u7F13\u5B58\u65E0\u6570\u636E\uFF0C\u5C31\u76F4\u63A5\u67E5 DB\uFF1B\u5982\u679C\u7F13\u5B58\u6709\u6570\u636E\uFF0C\u67E5\u8BE2\u7684\u6570\u636E\u4E5F\u4F1A\u5B58\u5728\u4E0D\u4E00\u81F4\u7684\u60C5\u51B5\u3002</p><p><strong>\u6240\u4EE5\u8FD9\u4E2A\u65B9\u6848\uFF0C\u662F\u5B9E\u73B0\u6700\u7EC8\u4E00\u81F4\u6027\u7684\u7EC8\u6781\u89E3\u51B3\u65B9\u6848\uFF0C\u4F46\u662F\u4E0D\u80FD\u4FDD\u8BC1\u5B9E\u65F6\u6027\u3002</strong></p><h2 id="\u51E0\u79CD\u65B9\u6848\u6BD4\u8F83" tabindex="-1"><a class="header-anchor" href="#\u51E0\u79CD\u65B9\u6848\u6BD4\u8F83" aria-hidden="true">#</a> \u51E0\u79CD\u65B9\u6848\u6BD4\u8F83</h2><p>\u6211\u4EEC\u5BF9\u6BD4\u4E0A\u9762\u8BA8\u8BBA\u7684 6 \u79CD\u65B9\u6848\uFF1A</p><ol><li>\u5148\u5199 Redis\uFF0C\u518D\u5199 MySQL</li></ol><ul><li><strong>\u8FD9\u79CD\u65B9\u6848\uFF0C\u6211\u80AF\u5B9A\u4E0D\u4F1A\u7528</strong>\uFF0C\u4E07\u4E00 DB \u6302\u4E86\uFF0C\u4F60\u628A\u6570\u636E\u5199\u5230\u7F13\u5B58\uFF0CDB 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MySQL</li></ol><ul><li>\u8FD9\u79CD\u65B9\u5F0F\uFF0C\u6211\u8FD8\u771F\u6CA1\u7528\u8FC7\uFF0C<strong>\u76F4\u63A5\u5FFD\u7565\u5427\u3002</strong></li></ul><ol start="4"><li>\u5148\u5220\u9664 Redis\uFF0C\u518D\u5199 MySQL\uFF0C\u518D\u5220\u9664 Redis</li></ol><ul><li>\u8FD9\u79CD\u65B9\u5F0F\u867D\u7136\u53EF\u884C\uFF0C\u4F46\u662F<strong>\u611F\u89C9\u597D\u590D\u6742</strong>\uFF0C\u8FD8\u8981\u641E\u4E2A\u6D88\u606F\u961F\u5217\u53BB\u5F02\u6B65\u5220\u9664 Redis\u3002</li></ul><ol start="5"><li>\u5148\u5199 MySQL\uFF0C\u518D\u5220\u9664 Redis</li></ol><ul><li><strong>\u6BD4\u8F83\u63A8\u8350\u8FD9\u79CD\u65B9\u5F0F</strong>\uFF0C\u5220\u9664 Redis \u5982\u679C\u5931\u8D25\uFF0C\u53EF\u4EE5\u518D\u591A\u91CD\u8BD5\u51E0\u6B21\uFF0C\u5426\u5219\u62A5\u8B66\u51FA\u6765\uFF1B</li><li>\u8FD9\u4E2A\u65B9\u6848\uFF0C\u662F\u5B9E\u65F6\u6027\u4E2D\u6700\u597D\u7684\u65B9\u6848\uFF0C\u5728\u4E00\u4E9B\u9AD8\u5E76\u53D1\u573A\u666F\u4E2D\uFF0C\u63A8\u8350\u8FD9\u79CD\u3002</li></ul><ol start="6"><li>\u5148\u5199 MySQL\uFF0C\u901A\u8FC7 Binlog\uFF0C\u5F02\u6B65\u66F4\u65B0 Redis</li></ol><ul><li><strong>\u5BF9\u4E8E\u5F02\u5730\u5BB9\u707E\u3001\u6570\u636E\u6C47\u603B\u7B49\uFF0C\u5EFA\u8BAE\u4F1A\u7528\u8FD9\u79CD\u65B9\u5F0F</strong>\uFF0C\u6BD4\u5982 binlog + kafka\uFF0C\u6570\u636E\u7684\u4E00\u81F4\u6027\u4E5F\u53EF\u4EE5\u8FBE\u5230\u79D2\u7EA7\uFF1B</li><li>\u7EAF\u7CB9\u7684\u9AD8\u5E76\u53D1\u573A\u666F\uFF0C\u4E0D\u5EFA\u8BAE\u7528\u8FD9\u79CD\u65B9\u6848\uFF0C\u6BD4\u5982\u62A2\u8D2D\u3001\u79D2\u6740\u7B49\u3002</li></ul><p><strong>\u4E2A\u4EBA\u7ED3\u8BBA\uFF1A</strong></p><ul><li><strong>\u5B9E\u65F6\u4E00\u81F4\u6027\u65B9\u6848</strong>\uFF1A\u91C7\u7528\u201C\u5148\u5199 MySQL\uFF0C\u518D\u5220\u9664 Redis\u201D\u7684\u7B56\u7565\uFF0C\u8FD9\u79CD\u60C5\u51B5\u867D\u7136\u4E5F\u4F1A\u5B58\u5728\u4E24\u8005\u4E0D\u4E00\u81F4\uFF0C\u4F46\u662F\u9700\u8981\u6EE1\u8DB3\u7684\u6761\u4EF6\u6709\u70B9\u82DB\u523B\uFF0C<strong>\u6240\u4EE5\u662F\u6EE1\u8DB3\u5B9E\u65F6\u6027\u6761\u4EF6\u4E0B\uFF0C\u80FD\u5C3D\u91CF\u6EE1\u8DB3\u4E00\u81F4\u6027\u7684\u6700\u4F18\u89E3\u3002</strong></li><li><strong>\u6700\u7EC8\u4E00\u81F4\u6027\u65B9\u6848</strong>\uFF1A\u91C7\u7528\u201C\u5148\u5199 MySQL\uFF0C\u901A\u8FC7 Binlog\uFF0C\u5F02\u6B65\u66F4\u65B0 Redis\u201D\uFF0C\u53EF\u4EE5\u901A\u8FC7 Binlog\uFF0C\u7ED3\u5408\u6D88\u606F\u961F\u5217\u5F02\u6B65\u66F4\u65B0 Redis\uFF0C<strong>\u662F\u6700\u7EC8\u4E00\u81F4\u6027\u7684\u6700\u4F18\u89E3\u3002</strong></li></ul><hr>',59),y=i("\u6574\u7406\uFF1A\u6C89\u9ED8\u738B\u4E8C\uFF0C\u6233"),f={href:"https://mp.weixin.qq.com/s/RL4Bt_UkNcnsBGL_9w37Zg",target:"_blank",rel:"noopener noreferrer"},R=i("\u8F6C\u8F7D\u94FE\u63A5"),q=i("\uFF0C\u4F5C\u8005\uFF1A\u697C\u4ED4\uFF0C\u6233"),j={href:"https://mp.weixin.qq.com/s/l7v4s1VekIPNi7KZuUgwGQ",target:"_blank",rel:"noopener noreferrer"},x=i("\u539F\u6587\u94FE\u63A5"),L=i("\u3002"),B=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png",alt:""})],-1);function v(Q,S){const s=a("ExternalLinkIcon");return o(),n("div",null,[e("blockquote",null,[e("p",null,[h,e("a",c,[p,t(s)]),g,e("a",b,[m,t(s)]),u])]),_,e("blockquote",null,[e("p",null,[y,e("a",f,[R,t(s)]),q,e("a",j,[x,t(s)]),L])]),B])}var z=r(d,[["render",v],["__file","redis-shuju-yizhixing.html.vue"]]);export{z as default};
diff --git a/dist/assets/redis-springboot.html.7783ee99.js b/dist/assets/redis-springboot.html.3faa6adc.js
similarity index 86%
rename from dist/assets/redis-springboot.html.7783ee99.js
rename to dist/assets/redis-springboot.html.3faa6adc.js
index 984287f6..6030904e 100644
--- a/dist/assets/redis-springboot.html.7783ee99.js
+++ b/dist/assets/redis-springboot.html.3faa6adc.js
@@ -1,52 +1,52 @@
-import{_ as p}from"./plugin-vue_export-helper.21dcd24c.js";import{r as t,o as c,c as o,a as n,b as a,w as l,d as s,e as u}from"./app.a0271b9c.js";const d={},r=n("p",null,"\u4F5C\u4E3A\u5F00\u53D1\u8005\uFF0C\u76F8\u4FE1\u5927\u5BB6\u90FD\u77E5\u9053 Redis \u7684\u91CD\u8981\u6027\u3002Redis \u662F\u4F7F\u7528 C \u8BED\u8A00\u5F00\u53D1\u7684\u4E00\u4E2A\u9AD8\u6027\u80FD\u952E\u503C\u5BF9\u6570\u636E\u5E93\uFF0C\u662F\u4E92\u8054\u7F51\u6280\u672F\u9886\u57DF\u4F7F\u7528\u6700\u4E3A\u5E7F\u6CDB\u7684\u5B58\u50A8\u4E2D\u95F4\u4EF6\uFF0C\u5B83\u662F\u300CRemote Dictionary Service\u300D\u7684\u9996\u5B57\u6BCD\u7F29\u5199\uFF0C\u4E5F\u5C31\u662F\u300C\u8FDC\u7A0B\u5B57\u5178\u670D\u52A1\u300D\u3002",-1),v=n("p",null,"Redis \u4EE5\u8D85\u9AD8\u7684\u6027\u80FD\u3001\u5B8C\u7F8E\u7684\u6587\u6863\u3001\u7B80\u6D01\u7684\u6E90\u7801\u8457\u79F0\uFF0C\u56FD\u5185\u5916\u5F88\u591A\u5927\u578B\u4E92\u8054\u7F51\u516C\u53F8\u90FD\u5728\u7528\uFF0C\u6BD4\u5982\u8BF4\u963F\u91CC\u3001\u817E\u8BAF\u3001GitHub\u3001Stack Overflow \u7B49\u7B49\u3002\u5F53\u7136\u4E86\uFF0C\u4E2D\u5C0F\u578B\u516C\u53F8\u4E5F\u90FD\u5728\u7528\u3002",-1),m=n("h3",{id:"\u5B89\u88C5-redis",tabindex:"-1"},[n("a",{class:"header-anchor",href:"#\u5B89\u88C5-redis","aria-hidden":"true"},"#"),s(" \u5B89\u88C5 Redis")],-1),k=n("p",null,"Redis \u7684\u5B98\u7F51\u63D0\u4F9B\u4E86\u5404\u79CD\u5E73\u53F0\u7684\u5B89\u88C5\u5305\uFF0CLinux\u3001macOS\u3001Windows \u7684\u90FD\u6709\u3002",-1),b=n("p",null,[n("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/redis-springboot-182f2469-b7f2-4fec-bd41-e5a33dca185a.png",alt:""})],-1),g=s("\u5B98\u65B9\u5730\u5740\uFF1A"),h={href:"https://redis.io/docs/getting-started/",target:"_blank",rel:"noopener noreferrer"},f=s("https://redis.io/docs/getting-started/"),_=n("p",null,[s("\u6211\u76EE\u524D\u7528\u7684\u662F macOS\uFF0C\u76F4\u63A5\u6267\u884C "),n("code",null,"brew install redis"),s(" \u5C31\u53EF\u4EE5\u5B8C\u6210\u5B89\u88C5\u4E86\u3002")],-1),y=n("p",null,[n("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/redis-springboot-cdf02715-5ed6-44b5-a1ce-db0249107dd7.png",alt:""})],-1),R=n("p",null,[s("\u5B8C\u6210\u5B89\u88C5\u540E\u6267\u884C "),n("code",null,"redis-server"),s(" \u5C31\u53EF\u4EE5\u542F\u52A8 Redis \u670D\u52A1\u4E86\u3002")],-1),x=n("p",null,[n("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/redis-springboot-8c272a19-e961-449c-afee-c973fb44a5e0.png",alt:""})],-1),j=s("Windows \u7528\u6237\u53EF\u4EE5\u901A\u8FC7\u6211\u4E4B\u524D\u63D0\u5230\u7684 "),S={href:"https://mp.weixin.qq.com/s/Hgm3ZAbOeBqpSUsJZBtlNg",target:"_blank",rel:"noopener noreferrer"},w=s("chocolatey \u547D\u4EE4\u884C\u8F6F\u4EF6\u7BA1\u7406\u795E\u5668"),T=s("\u5B89\u88C5\uFF08\u53EF\u4EE5\u6233\u94FE\u63A5\u4E86\u89E3\u8BE6\u60C5\uFF09\uFF0C\u53EA\u9700\u8981\u4E00\u884C\u547D\u4EE4 "),C=n("code",null,"choco install redis",-1),q=s(" \u5C31\u53EF\u4EE5\u5B8C\u6210\u5B89\u88C5\u4E86\uFF0C\u975E\u5E38\u65B9\u4FBF\u3002"),I=n("p",null,[n("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/redis-springboot-13b569ca-e747-4d64-af0d-a9a5d0260f5f.png",alt:""})],-1),O=n("p",null,"\u751F\u4EA7\u73AF\u5883\u4E2D\uFF0C\u6211\u4EEC\u901A\u5E38\u4F1A\u5728 Linux \u4E0A\u5B89\u88C5 Redis\u3002\u6211\u7684\u670D\u52A1\u5668\u4E0A\u5B89\u88C5\u4E86\u5B9D\u5854\u9762\u677F\uFF0C\u53EF\u4EE5\u76F4\u63A5\u5728\u8F6F\u4EF6\u5546\u5E97\u91CC\u641C\u300CRedis\u300D\u5173\u952E\u5B57\uFF0C\u7136\u540E\u76F4\u63A5\u5B89\u88C5\uFF08\u6211\u5DF2\u7ECF\u5B89\u88C5\u8FC7\u4E86\uFF09\u3002",-1),z=n("p",null,[n("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/redis-springboot-df5e600b-1290-447c-b140-6f513c69492c.png",alt:""})],-1),P=n("p",null,"\u987A\u5E26\u5B89\u88C5\u4E00\u4E0B Redis \u5BA2\u6237\u7AEF\u5DE5\u5177\uFF0C\u63A8\u8350 GitHub \u661F\u6807 20k+ \u7684 AnotherRedisDesktopManager\uFF0C\u4E00\u6B3E \u{1F680}\u{1F680}\u{1F680} \u66F4\u5FEB\u3001\u66F4\u597D\u3001\u66F4\u7A33\u5B9A\u7684Redis\u684C\u9762(GUI)\u7BA1\u7406\u5BA2\u6237\u7AEF\uFF0C\u652F\u6301 Windows\u3001macOS \u548C Linux\uFF0C\u6027\u80FD\u51FA\u4F17\uFF0C\u53EF\u4EE5\u8F7B\u677E\u52A0\u8F7D\u6D77\u91CF\u952E\u503C\u3002",-1),L={href:"https://github.com/qishibo/AnotherRedisDesktopManager",target:"_blank",rel:"noopener noreferrer"},A=s("https://github.com/qishibo/AnotherRedisDesktopManager"),F=n("p",null,"\u5B89\u88C5\u5B8C\u6210\u540E\uFF0C\u94FE\u63A5 Redis \u670D\u52A1\uFF1A",-1),V=n("p",null,[n("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/redis-springboot-d36b9022-fe3b-4fb1-80c3-8d23d19d9025.png",alt:""})],-1),B=n("h3",{id:"redis-\u6570\u636E\u7C7B\u578B",tabindex:"-1"},[n("a",{class:"header-anchor",href:"#redis-\u6570\u636E\u7C7B\u578B","aria-hidden":"true"},"#"),s(" Redis \u6570\u636E\u7C7B\u578B")],-1),J=n("p",null,"Redis\u652F\u6301\u4E94\u79CD\u6570\u636E\u7C7B\u578B\uFF1Astring\uFF08\u5B57\u7B26\u4E32\uFF09\uFF0Chash\uFF08\u54C8\u5E0C\uFF09\uFF0Clist\uFF08\u5217\u8868\uFF09\uFF0Cset\uFF08\u96C6\u5408\uFF09\u53CAzset(sorted set\uFF1A\u6709\u5E8F\u96C6\u5408)\u3002",-1),M=s("Redis \u6559\u7A0B\uFF1A"),D={href:"https://www.redis.net.cn/tutorial/3508.html",target:"_blank",rel:"noopener noreferrer"},E=s("https://www.redis.net.cn/tutorial/3508.html"),N=u(`<p><strong>1\uFF09string</strong></p><p>string \u662F Redis \u6700\u57FA\u672C\u7684\u6570\u636E\u7C7B\u578B\uFF0C\u4E00\u4E2Akey\u5BF9\u5E94\u4E00\u4E2Avalue\u3002</p><p>\u6211\u4EEC\u53EF\u4EE5\u901A\u8FC7 AnotherRedisDesktopManager \u5BA2\u6237\u7AEF\u6765\u7EC3\u4E60\u4E00\u4E0B\u57FA\u672C\u7684 set\u3001get \u547D\u4EE4\uFF08\u53C2\u8003 Redis \u6587\u6863\uFF0C\u5BA2\u6237\u7AEF\u4F1A\u6709\u63D0\u793A\uFF0C\u6240\u4EE5\u547D\u4EE4\u5B8C\u5168\u4E0D\u7528\u6B7B\u8BB0\u786C\u80CC\uFF09\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/redis-springboot-d7d4043b-b753-484c-bfc1-25533004cca5.png" alt=""></p><p>\u5BF9\u5E94\u6587\u672C\u547D\u4EE4\uFF1A</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>### \u589E\u52A0\u4E00\u4E2A key \u4E3A name\uFF0Cvalue \u4E3A \u6C89\u9ED8\u738B\u4E8C
+import{_ as t}from"./plugin-vue_export-helper.21dcd24c.js";import{r as i,o as p,c,a as n,b as e,d as s,e as o}from"./app.615e41d8.js";const l={},u=n("p",null,"\u4F5C\u4E3A\u5F00\u53D1\u8005\uFF0C\u76F8\u4FE1\u5927\u5BB6\u90FD\u77E5\u9053 Redis \u7684\u91CD\u8981\u6027\u3002Redis \u662F\u4F7F\u7528 C \u8BED\u8A00\u5F00\u53D1\u7684\u4E00\u4E2A\u9AD8\u6027\u80FD\u952E\u503C\u5BF9\u6570\u636E\u5E93\uFF0C\u662F\u4E92\u8054\u7F51\u6280\u672F\u9886\u57DF\u4F7F\u7528\u6700\u4E3A\u5E7F\u6CDB\u7684\u5B58\u50A8\u4E2D\u95F4\u4EF6\uFF0C\u5B83\u662F\u300CRemote Dictionary Service\u300D\u7684\u9996\u5B57\u6BCD\u7F29\u5199\uFF0C\u4E5F\u5C31\u662F\u300C\u8FDC\u7A0B\u5B57\u5178\u670D\u52A1\u300D\u3002",-1),d=n("p",null,"Redis \u4EE5\u8D85\u9AD8\u7684\u6027\u80FD\u3001\u5B8C\u7F8E\u7684\u6587\u6863\u3001\u7B80\u6D01\u7684\u6E90\u7801\u8457\u79F0\uFF0C\u56FD\u5185\u5916\u5F88\u591A\u5927\u578B\u4E92\u8054\u7F51\u516C\u53F8\u90FD\u5728\u7528\uFF0C\u6BD4\u5982\u8BF4\u963F\u91CC\u3001\u817E\u8BAF\u3001GitHub\u3001Stack Overflow \u7B49\u7B49\u3002\u5F53\u7136\u4E86\uFF0C\u4E2D\u5C0F\u578B\u516C\u53F8\u4E5F\u90FD\u5728\u7528\u3002",-1),r=n("h2",{id:"\u5B89\u88C5-redis",tabindex:"-1"},[n("a",{class:"header-anchor",href:"#\u5B89\u88C5-redis","aria-hidden":"true"},"#"),s(" \u5B89\u88C5 Redis")],-1),v=n("p",null,"Redis \u7684\u5B98\u7F51\u63D0\u4F9B\u4E86\u5404\u79CD\u5E73\u53F0\u7684\u5B89\u88C5\u5305\uFF0CLinux\u3001macOS\u3001Windows \u7684\u90FD\u6709\u3002",-1),m=n("p",null,[n("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/redis-springboot-182f2469-b7f2-4fec-bd41-e5a33dca185a.png",alt:""})],-1),k=s("\u5B98\u65B9\u5730\u5740\uFF1A"),b={href:"https://redis.io/docs/getting-started/",target:"_blank",rel:"noopener noreferrer"},g=s("https://redis.io/docs/getting-started/"),h=n("p",null,[s("\u6211\u76EE\u524D\u7528\u7684\u662F macOS\uFF0C\u76F4\u63A5\u6267\u884C "),n("code",null,"brew install redis"),s(" \u5C31\u53EF\u4EE5\u5B8C\u6210\u5B89\u88C5\u4E86\u3002")],-1),f=n("p",null,[n("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/redis-springboot-cdf02715-5ed6-44b5-a1ce-db0249107dd7.png",alt:""})],-1),_=n("p",null,[s("\u5B8C\u6210\u5B89\u88C5\u540E\u6267\u884C "),n("code",null,"redis-server"),s(" \u5C31\u53EF\u4EE5\u542F\u52A8 Redis \u670D\u52A1\u4E86\u3002")],-1),y=n("p",null,[n("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/redis-springboot-8c272a19-e961-449c-afee-c973fb44a5e0.png",alt:""})],-1),R=s("Windows \u7528\u6237\u53EF\u4EE5\u901A\u8FC7\u6211\u4E4B\u524D\u63D0\u5230\u7684 "),x={href:"https://mp.weixin.qq.com/s/Hgm3ZAbOeBqpSUsJZBtlNg",target:"_blank",rel:"noopener noreferrer"},j=s("chocolatey \u547D\u4EE4\u884C\u8F6F\u4EF6\u7BA1\u7406\u795E\u5668"),S=s("\u5B89\u88C5\uFF08\u53EF\u4EE5\u6233\u94FE\u63A5\u4E86\u89E3\u8BE6\u60C5\uFF09\uFF0C\u53EA\u9700\u8981\u4E00\u884C\u547D\u4EE4 "),w=n("code",null,"choco install redis",-1),T=s(" \u5C31\u53EF\u4EE5\u5B8C\u6210\u5B89\u88C5\u4E86\uFF0C\u975E\u5E38\u65B9\u4FBF\u3002"),C=n("p",null,[n("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/redis-springboot-13b569ca-e747-4d64-af0d-a9a5d0260f5f.png",alt:""})],-1),q=n("p",null,"\u751F\u4EA7\u73AF\u5883\u4E2D\uFF0C\u6211\u4EEC\u901A\u5E38\u4F1A\u5728 Linux \u4E0A\u5B89\u88C5 Redis\u3002\u6211\u7684\u670D\u52A1\u5668\u4E0A\u5B89\u88C5\u4E86\u5B9D\u5854\u9762\u677F\uFF0C\u53EF\u4EE5\u76F4\u63A5\u5728\u8F6F\u4EF6\u5546\u5E97\u91CC\u641C\u300CRedis\u300D\u5173\u952E\u5B57\uFF0C\u7136\u540E\u76F4\u63A5\u5B89\u88C5\uFF08\u6211\u5DF2\u7ECF\u5B89\u88C5\u8FC7\u4E86\uFF09\u3002",-1),I=n("p",null,[n("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/redis-springboot-df5e600b-1290-447c-b140-6f513c69492c.png",alt:""})],-1),O=n("p",null,"\u987A\u5E26\u5B89\u88C5\u4E00\u4E0B Redis \u5BA2\u6237\u7AEF\u5DE5\u5177\uFF0C\u63A8\u8350 GitHub \u661F\u6807 20k+ \u7684 AnotherRedisDesktopManager\uFF0C\u4E00\u6B3E \u{1F680}\u{1F680}\u{1F680} \u66F4\u5FEB\u3001\u66F4\u597D\u3001\u66F4\u7A33\u5B9A\u7684Redis\u684C\u9762(GUI)\u7BA1\u7406\u5BA2\u6237\u7AEF\uFF0C\u652F\u6301 Windows\u3001macOS \u548C Linux\uFF0C\u6027\u80FD\u51FA\u4F17\uFF0C\u53EF\u4EE5\u8F7B\u677E\u52A0\u8F7D\u6D77\u91CF\u952E\u503C\u3002",-1),z={href:"https://github.com/qishibo/AnotherRedisDesktopManager",target:"_blank",rel:"noopener noreferrer"},P=s("https://github.com/qishibo/AnotherRedisDesktopManager"),A=n("p",null,"\u5B89\u88C5\u5B8C\u6210\u540E\uFF0C\u94FE\u63A5 Redis \u670D\u52A1\uFF1A",-1),L=n("p",null,[n("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/redis-springboot-d36b9022-fe3b-4fb1-80c3-8d23d19d9025.png",alt:""})],-1),F=n("h2",{id:"redis-\u6570\u636E\u7C7B\u578B",tabindex:"-1"},[n("a",{class:"header-anchor",href:"#redis-\u6570\u636E\u7C7B\u578B","aria-hidden":"true"},"#"),s(" Redis \u6570\u636E\u7C7B\u578B")],-1),V=n("p",null,"Redis\u652F\u6301\u4E94\u79CD\u6570\u636E\u7C7B\u578B\uFF1Astring\uFF08\u5B57\u7B26\u4E32\uFF09\uFF0Chash\uFF08\u54C8\u5E0C\uFF09\uFF0Clist\uFF08\u5217\u8868\uFF09\uFF0Cset\uFF08\u96C6\u5408\uFF09\u53CAzset(sorted set\uFF1A\u6709\u5E8F\u96C6\u5408)\u3002",-1),B=s("Redis \u6559\u7A0B\uFF1A"),J={href:"https://www.redis.net.cn/tutorial/3508.html",target:"_blank",rel:"noopener noreferrer"},M=s("https://www.redis.net.cn/tutorial/3508.html"),D=o(`<p><strong>1\uFF09string</strong></p><p>string \u662F Redis \u6700\u57FA\u672C\u7684\u6570\u636E\u7C7B\u578B\uFF0C\u4E00\u4E2Akey\u5BF9\u5E94\u4E00\u4E2Avalue\u3002</p><p>\u6211\u4EEC\u53EF\u4EE5\u901A\u8FC7 AnotherRedisDesktopManager \u5BA2\u6237\u7AEF\u6765\u7EC3\u4E60\u4E00\u4E0B\u57FA\u672C\u7684 set\u3001get \u547D\u4EE4\uFF08\u53C2\u8003 Redis \u6587\u6863\uFF0C\u5BA2\u6237\u7AEF\u4F1A\u6709\u63D0\u793A\uFF0C\u6240\u4EE5\u547D\u4EE4\u5B8C\u5168\u4E0D\u7528\u6B7B\u8BB0\u786C\u80CC\uFF09\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/redis-springboot-d7d4043b-b753-484c-bfc1-25533004cca5.png" alt=""></p><p>\u5BF9\u5E94\u6587\u672C\u547D\u4EE4\uFF1A</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>## \u589E\u52A0\u4E00\u4E2A key \u4E3A name\uFF0Cvalue \u4E3A \u6C89\u9ED8\u738B\u4E8C
 &gt; set name &#39;\u6C89\u9ED8\u738B\u4E8C&#39;
 OK
-### \u83B7\u53D6
+## \u83B7\u53D6
 &gt; get name
 \u6C89\u9ED8\u738B\u4E8C
 &gt; set name &#39;\u6C89\u9ED8\u738B\u4E09&#39;
 OK
 &gt; get name
 \u6C89\u9ED8\u738B\u4E09
-### \u5220\u9664
+## \u5220\u9664
 &gt; del name
 1
 &gt; get name
 null
-### \u6D4B\u8BD5\u662F\u5426\u5B58\u5728 name
+## \u6D4B\u8BD5\u662F\u5426\u5B58\u5728 name
 &gt; EXISTS key
 0
 &gt; EXISTS name
 0
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p><strong>2\uFF09hash</strong></p><p>Redis hash \u662F\u4E00\u4E2A\u952E\u503C\u5BF9\u96C6\u5408\uFF0C\u503C\u53EF\u4EE5\u770B\u6210\u662F\u4E00\u4E2A Map\u3002</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>### \u6E05\u9664\u6570\u636E\u5E93
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p><strong>2\uFF09hash</strong></p><p>Redis hash \u662F\u4E00\u4E2A\u952E\u503C\u5BF9\u96C6\u5408\uFF0C\u503C\u53EF\u4EE5\u770B\u6210\u662F\u4E00\u4E2A Map\u3002</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>## \u6E05\u9664\u6570\u636E\u5E93
 &gt; flushdb
 OK
-### \u521B\u5EFA hash\uFF0Ckey \u4E3A user_hset \u5B57\u6BB5\u4E3A user1\uFF0C\u503C\u4E3A \u6C89\u9ED8\u738B\u4E8C
+## \u521B\u5EFA hash\uFF0Ckey \u4E3A user_hset \u5B57\u6BB5\u4E3A user1\uFF0C\u503C\u4E3A \u6C89\u9ED8\u738B\u4E8C
 &gt; hset user_hset user1 \u6C89\u9ED8\u738B\u4E8C
 1
 &gt; hset user_hset user2 \u6C89\u9ED8\u738B\u4E09
 1
-### \u5B57\u6BB5\u957F\u5EA6
+## \u5B57\u6BB5\u957F\u5EA6
 &gt; hlen user_hset
 2
-### \u6240\u6709\u5B57\u6BB5
+## \u6240\u6709\u5B57\u6BB5
 &gt; HKEYS user_hset
 user1
 user2
-### \u6240\u6709\u503C
+## \u6240\u6709\u503C
 &gt; hvals user_hset
 \u6C89\u9ED8\u738B\u4E8C
 \u6C89\u9ED8\u738B\u4E09
-### \u5B57\u6BB5 user1 \u7684\u503C
+## \u5B57\u6BB5 user1 \u7684\u503C
 &gt; hget user_hset user1
 \u6C89\u9ED8\u738B\u4E8C
-### \u83B7\u53D6 key \u4E3A user_hset \u7684\u6240\u6709\u5B57\u6BB5\u548C\u503C
+## \u83B7\u53D6 key \u4E3A user_hset \u7684\u6240\u6709\u5B57\u6BB5\u548C\u503C
 &gt; hgetall user_hset
 user1
 \u6C89\u9ED8\u738B\u4E8C
 user2
 \u6C89\u9ED8\u738B\u4E09
-### \u66F4\u65B0\u5B57\u6BB5
+## \u66F4\u65B0\u5B57\u6BB5
 &gt; hset user_hset user1 \u6C89\u9ED8\u738B\u56DB
 0
 &gt; hgetall user_hset
@@ -59,17 +59,17 @@ user2
 &gt; hgetall user_hset
 user2
 \u6C89\u9ED8\u738B\u4E09
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p><strong>3\uFF09list</strong></p><p>list \u662F\u4E00\u4E2A\u7B80\u5355\u7684\u5B57\u7B26\u4E32\u5217\u8868\uFF0C\u6309\u7167\u63D2\u5165\u987A\u5E8F\u6392\u5E8F\u3002</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>### \u6DFB\u52A0 key \u4E3A user_list value \u4E3A \u6C89\u9ED8\u738B\u4E8C\u3001\u6C89\u9ED8\u4E07\u4E09\u7684\u96C6\u5408
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p><strong>3\uFF09list</strong></p><p>list \u662F\u4E00\u4E2A\u7B80\u5355\u7684\u5B57\u7B26\u4E32\u5217\u8868\uFF0C\u6309\u7167\u63D2\u5165\u987A\u5E8F\u6392\u5E8F\u3002</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>## \u6DFB\u52A0 key \u4E3A user_list value \u4E3A \u6C89\u9ED8\u738B\u4E8C\u3001\u6C89\u9ED8\u4E07\u4E09\u7684\u96C6\u5408
 &gt; lpush user_list \u6C89\u9ED8\u738B\u4E8C \u6C89\u9ED8\u738B\u4E09
 2
-### \u67E5\u8BE2
+## \u67E5\u8BE2
 &gt; lrange user_list 0 -1
 \u6C89\u9ED8\u738B\u4E09
 \u6C89\u9ED8\u738B\u4E8C
-### \u5F80\u5C3E\u90E8\u6DFB\u52A0
+## \u5F80\u5C3E\u90E8\u6DFB\u52A0
 &gt; rpush user_list \u6C89\u9ED8\u738B\u4E8C\u662F\u6C99\u6BD4
 3
-### \u5934\u90E8\u6DFB\u52A0
+## \u5934\u90E8\u6DFB\u52A0
 &gt; lpush user_list \u6C89\u9ED8\u738B\u4E8C\u662F\u50BB\u53C9
 4
 &gt; lrange user_list 0 -1
@@ -77,7 +77,7 @@ user2
 \u6C89\u9ED8\u738B\u4E09
 \u6C89\u9ED8\u738B\u4E8C
 \u6C89\u9ED8\u738B\u4E8C\u662F\u6C99\u6BD4
-### \u66F4\u65B0 index \u4E3A 0 \u7684\u503C
+## \u66F4\u65B0 index \u4E3A 0 \u7684\u503C
 &gt; lset user_list 0 \u6C89\u9ED8\u738B\u56DB
 OK
 &gt; lrange user_list 0 -1
@@ -85,28 +85,28 @@ OK
 \u6C89\u9ED8\u738B\u4E09
 \u6C89\u9ED8\u738B\u4E8C
 \u6C89\u9ED8\u738B\u4E8C\u662F\u6C99\u6BD4
-### \u5220\u9664 index \u4E3A 0 \u7684\u503C
+## \u5220\u9664 index \u4E3A 0 \u7684\u503C
 &gt; lrem user_list 0 \u6C89\u9ED8\u738B\u56DB
 1
 &gt; lrange user_list 0 -1
 \u6C89\u9ED8\u738B\u4E09
 \u6C89\u9ED8\u738B\u4E8C
 \u6C89\u9ED8\u738B\u4E8C\u662F\u6C99\u6BD4
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p><strong>4\uFF09set</strong></p><p>set \u662F string \u7C7B\u578B\u7684\u65E0\u5E8F\u96C6\u5408\uFF0C\u4E0D\u5141\u8BB8\u6709\u91CD\u590D\u7684\u5143\u7D20\u3002</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>### \u6DFB\u52A0 key \u4E3A user_set value \u4E3A\u6C89\u9ED8\u738B\u4E8C \u6C89\u9ED8\u738B\u4E09 \u6C89\u9ED8\u738B\u4E8C\u7684\u72D7\u817F\u5B50\u7684\u96C6\u5408
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p><strong>4\uFF09set</strong></p><p>set \u662F string \u7C7B\u578B\u7684\u65E0\u5E8F\u96C6\u5408\uFF0C\u4E0D\u5141\u8BB8\u6709\u91CD\u590D\u7684\u5143\u7D20\u3002</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>## \u6DFB\u52A0 key \u4E3A user_set value \u4E3A\u6C89\u9ED8\u738B\u4E8C \u6C89\u9ED8\u738B\u4E09 \u6C89\u9ED8\u738B\u4E8C\u7684\u72D7\u817F\u5B50\u7684\u96C6\u5408
 &gt; sadd user_set \u6C89\u9ED8\u738B\u4E8C \u6C89\u9ED8\u738B\u4E09 \u6C89\u9ED8\u738B\u4E8C\u7684\u72D7\u817F\u5B50
 3
-### \u67E5\u8BE2
+## \u67E5\u8BE2
 &gt; smembers user_set
 \u6C89\u9ED8\u738B\u4E8C
 \u6C89\u9ED8\u738B\u4E8C\u7684\u72D7\u817F\u5B50
 \u6C89\u9ED8\u738B\u4E09
-### \u5220\u9664 value \u4E3A\u6C89\u9ED8\u738B\u4E8C\u7684\u5143\u7D20
+## \u5220\u9664 value \u4E3A\u6C89\u9ED8\u738B\u4E8C\u7684\u5143\u7D20
 &gt; srem user_set \u6C89\u9ED8\u738B\u4E8C
 1
 &gt; smembers user_set
 \u6C89\u9ED8\u738B\u4E8C\u7684\u72D7\u817F\u5B50
 \u6C89\u9ED8\u738B\u4E09
-### \u6DFB\u52A0
+## \u6DFB\u52A0
 &gt; sadd user_set \u6C89\u9ED8\u738B\u4E8C
 1
 &gt; smembers user_set
@@ -115,23 +115,23 @@ OK
 \u6C89\u9ED8\u738B\u4E09
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p><strong>5\uFF09sorted set</strong></p><p>sorted set \u662F string \u7C7B\u578B\u7684\u6709\u5E8F\u96C6\u5408\uFF0C\u4E0D\u5141\u8BB8\u6709\u91CD\u590D\u7684\u5143\u7D20\u3002</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&gt; FLUSHDB
 OK
-### \u6DFB\u52A0 key \u4E3A user_zset \u5206\u6570\u4E3A 1 \u503C\u4E3A\u6C89\u9ED8\u738B\u4E8C\u3001\u5206\u6570\u4E3A 2 \u503C\u4E3A\u6C89\u9ED8\u738B\u4E09\u3001\u5206\u6570\u4E3A 3 \u503C\u4E3A\u6C89\u9ED8\u738B\u4E8C\u7684\u72D7\u817F\u5B50
+## \u6DFB\u52A0 key \u4E3A user_zset \u5206\u6570\u4E3A 1 \u503C\u4E3A\u6C89\u9ED8\u738B\u4E8C\u3001\u5206\u6570\u4E3A 2 \u503C\u4E3A\u6C89\u9ED8\u738B\u4E09\u3001\u5206\u6570\u4E3A 3 \u503C\u4E3A\u6C89\u9ED8\u738B\u4E8C\u7684\u72D7\u817F\u5B50
 &gt; zadd user_zset 1 \u6C89\u9ED8\u738B\u4E8C 2 \u6C89\u9ED8\u738B\u4E09 3 \u6C89\u9ED8\u738B\u4E8C\u7684\u72D7\u817F\u5B50
 3
-### \u67E5\u8BE2
+## \u67E5\u8BE2
 &gt; zrange user_zset 0 -1
 \u6C89\u9ED8\u738B\u4E8C
 \u6C89\u9ED8\u738B\u4E09
 \u6C89\u9ED8\u738B\u4E8C\u7684\u72D7\u817F\u5B50
-### \u53CD\u8F6C
+## \u53CD\u8F6C
 &gt; zrevrange user_zset 0 -1
 \u6C89\u9ED8\u738B\u4E8C\u7684\u72D7\u817F\u5B50
 \u6C89\u9ED8\u738B\u4E09
 \u6C89\u9ED8\u738B\u4E8C
-### \u67E5\u8BE2\u5143\u7D20\u6C89\u9ED8\u738B\u4E8C\u7684\u5206\u6570
+## \u67E5\u8BE2\u5143\u7D20\u6C89\u9ED8\u738B\u4E8C\u7684\u5206\u6570
 &gt; zscore user_zset \u6C89\u9ED8\u738B\u4E8C
 1
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="spring-boot-\u6574\u5408-redis" tabindex="-1"><a class="header-anchor" href="#spring-boot-\u6574\u5408-redis" aria-hidden="true">#</a> Spring Boot \u6574\u5408 Redis</h3><p>\u7B2C\u4E00\u6B65\uFF0C\u5728 pom.xml \u6587\u4EF6\u4E2D\u6DFB\u52A0 Redis \u7684 starter\u3002</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h2 id="spring-boot-\u6574\u5408-redis" tabindex="-1"><a class="header-anchor" href="#spring-boot-\u6574\u5408-redis" aria-hidden="true">#</a> Spring Boot \u6574\u5408 Redis</h2><p>\u7B2C\u4E00\u6B65\uFF0C\u5728 pom.xml \u6587\u4EF6\u4E2D\u6DFB\u52A0 Redis \u7684 starter\u3002</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
     &lt;groupId&gt;org.springframework.boot&lt;/groupId&gt;
     &lt;artifactId&gt;spring-boot-starter-data-redis&lt;/artifactId&gt;
 &lt;/dependency&gt;
@@ -176,7 +176,7 @@ OK
     <span class="token punctuation">}</span>
 
 <span class="token punctuation">}</span>
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>RedisTemplate \u548C StringRedisTemplate \u90FD\u662F Spring Data Redis \u63D0\u4F9B\u7684\u6A21\u677F\u7C7B\uFF0C\u53EF\u4EE5\u5BF9 Redis \u8FDB\u884C\u64CD\u4F5C\uFF0C\u540E\u8005\u9488\u5BF9\u952E\u503C\u5BF9\u90FD\u662F String \u7C7B\u578B\u7684\u6570\u636E\uFF0C\u524D\u8005\u53EF\u4EE5\u662F\u4EFB\u4F55\u7C7B\u578B\u7684\u5BF9\u8C61\u3002</p><p>RedisTemplate \u548C StringRedisTemplate \u9664\u4E86\u63D0\u4F9B opsForValue \u65B9\u6CD5\u6765\u64CD\u4F5C\u5B57\u7B26\u4E32\u4E4B\u5916\uFF0C\u8FD8\u63D0\u4F9B\u4E86\u4EE5\u4E0B\u65B9\u6CD5\uFF1A</p><ul><li>opsForList\uFF1A\u64CD\u4F5C list</li><li>opsForSet\uFF1A\u64CD\u4F5C set</li><li>opsForZSet\uFF1A\u64CD\u4F5C\u6709\u5E8F set</li><li>opsForHash\uFF1A\u64CD\u4F5C hash</li></ul><p>\u8FD0\u884C\u6D4B\u8BD5\u7C7B\u540E\u53EF\u4EE5\u5728\u63A7\u5236\u53F0\u770B\u5230\u4EE5\u4E0B\u8F93\u51FA\u4FE1\u606F\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/redis-springboot-f4456aea-2e48-4bad-910d-2d963ef0224e.png" alt=""></p><p>\u4E5F\u53EF\u4EE5\u901A\u8FC7 AnotherRedisDesktopManager \u5BA2\u6237\u7AEF\u67E5\u770B Redis \u6570\u636E\u5E93\u4E2D\u7684\u6570\u636E\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/redis-springboot-f7551ebb-0bde-4084-9ab0-4a724d8ad2ec.png" alt=""></p><h3 id="\u7F16\u7A0B\u55B5\u6574\u5408-redis" tabindex="-1"><a class="header-anchor" href="#\u7F16\u7A0B\u55B5\u6574\u5408-redis" aria-hidden="true">#</a> \u7F16\u7A0B\u55B5\u6574\u5408 Redis</h3><p>\u7F16\u7A0B\u55B5\u662F\u4E00\u4E2A Spring Boot + Vue \u7684\u524D\u540E\u7AEF\u5206\u79BB\u9879\u76EE\uFF0C\u8981\u6574\u5408 Redis \u7684\u8BDD\uFF0C\u6700\u597D\u7684\u65B9\u5F0F\u662F\u4F7F\u7528 Spring Cache\uFF0C\u4EC5\u4EC5\u901A\u8FC7 @Cacheable\u3001@CachePut\u3001@CacheEvict\u3001@EnableCaching \u7B49\u6CE8\u89E3\u5C31\u53EF\u4EE5\u8F7B\u677E\u4F7F\u7528 Redis \u505A\u7F13\u5B58\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/redis-springboot-eb6d69d7-9152-4695-87c7-cba138ca93fd.png" alt=""></p><p><strong>1\uFF09@EnableCaching</strong>\uFF0C\u5F00\u542F\u7F13\u5B58\u529F\u80FD\u3002</p><p><strong>2\uFF09@Cacheable</strong>\uFF0C\u8C03\u7528\u65B9\u6CD5\u524D\uFF0C\u53BB\u7F13\u5B58\u4E2D\u627E\uFF0C\u627E\u5230\u5C31\u8FD4\u56DE\uFF0C\u627E\u4E0D\u5230\u5C31\u6267\u884C\u65B9\u6CD5\uFF0C\u5E76\u5C06\u8FD4\u56DE\u503C\u653E\u5230\u7F13\u5B58\u4E2D\u3002</p><p><strong>3\uFF09@CachePut</strong>\uFF0C\u65B9\u6CD5\u8C03\u7528\u524D\u4E0D\u4F1A\u53BB\u7F13\u5B58\u4E2D\u627E\uFF0C\u65E0\u8BBA\u5982\u4F55\u90FD\u4F1A\u6267\u884C\u65B9\u6CD5\uFF0C\u6267\u884C\u5B8C\u5C06\u8FD4\u56DE\u503C\u653E\u5230\u7F13\u5B58\u4E2D\u3002</p><p><strong>4\uFF09@CacheEvict</strong>\uFF0C\u6E05\u7406\u7F13\u5B58\u4E2D\u7684\u4E00\u4E2A\u6216\u591A\u4E2A\u8BB0\u5F55\u3002</p><p>Spring Cache \u662F Spring \u63D0\u4F9B\u7684\u4E00\u5957\u5B8C\u6574\u7684\u7F13\u5B58\u89E3\u51B3\u65B9\u6848\uFF0C\u867D\u7136\u5B83\u672C\u8EAB\u6CA1\u6709\u63D0\u4F9B\u7F13\u5B58\u7684\u5B9E\u73B0\uFF0C\u4F46\u5B83\u63D0\u4F9B\u7684\u4E00\u6574\u5957\u63A5\u53E3\u3001\u89C4\u8303\u3001\u914D\u7F6E\u3001\u6CE8\u89E3\u7B49\uFF0C\u53EF\u4EE5\u8BA9\u6211\u4EEC\u65E0\u7F1D\u8854\u63A5 Redis\u3001Ehcache \u7B49\u7F13\u5B58\u5B9E\u73B0\u3002</p><p>Spring Cache \u7684\u6CE8\u89E3\uFF08\u524D\u9762\u63D0\u5230\u7684\u56DB\u4E2A\uFF09\u4F1A\u5728\u8C03\u7528\u65B9\u6CD5\u4E4B\u540E\uFF0C\u53BB\u7F13\u5B58\u65B9\u6CD5\u8FD4\u56DE\u7684\u6700\u7EC8\u7ED3\u679C\uFF1B\u6216\u8005\u5728\u65B9\u6CD5\u8C03\u7528\u4E4B\u524D\u62FF\u7F13\u5B58\u4E2D\u7684\u7ED3\u679C\uFF0C\u5F53\u7136\u8FD8\u6709\u5220\u9664\u7F13\u5B58\u4E2D\u7684\u7ED3\u679C\u3002</p><p>\u8FD9\u4E9B\u8BFB\u5199\u64CD\u4F5C\u4E0D\u7528\u6211\u4EEC\u624B\u52A8\u518D\u53BB\u5199\u4EE3\u7801\u5B9E\u73B0\u4E86\uFF0C\u76F4\u63A5\u4EA4\u7ED9 Spring Cache \u6765\u6253\u7406\u5C31 OK \u4E86\uFF0C\u662F\u4E0D\u662F\u975E\u5E38\u8D34\u5FC3\uFF1F</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/redis-springboot-afed274d-458d-4e6e-9fd0-b421ac811f47.png" alt=""></p><p><strong>\u7B2C\u4E00\u6B65</strong>\uFF0C\u5728 pom.xml \u6587\u4EF6\u4E2D\u8FFD\u52A0 Redis \u7684 starter\u3002</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>RedisTemplate \u548C StringRedisTemplate \u90FD\u662F Spring Data Redis \u63D0\u4F9B\u7684\u6A21\u677F\u7C7B\uFF0C\u53EF\u4EE5\u5BF9 Redis \u8FDB\u884C\u64CD\u4F5C\uFF0C\u540E\u8005\u9488\u5BF9\u952E\u503C\u5BF9\u90FD\u662F String \u7C7B\u578B\u7684\u6570\u636E\uFF0C\u524D\u8005\u53EF\u4EE5\u662F\u4EFB\u4F55\u7C7B\u578B\u7684\u5BF9\u8C61\u3002</p><p>RedisTemplate \u548C StringRedisTemplate \u9664\u4E86\u63D0\u4F9B opsForValue \u65B9\u6CD5\u6765\u64CD\u4F5C\u5B57\u7B26\u4E32\u4E4B\u5916\uFF0C\u8FD8\u63D0\u4F9B\u4E86\u4EE5\u4E0B\u65B9\u6CD5\uFF1A</p><ul><li>opsForList\uFF1A\u64CD\u4F5C list</li><li>opsForSet\uFF1A\u64CD\u4F5C set</li><li>opsForZSet\uFF1A\u64CD\u4F5C\u6709\u5E8F set</li><li>opsForHash\uFF1A\u64CD\u4F5C hash</li></ul><p>\u8FD0\u884C\u6D4B\u8BD5\u7C7B\u540E\u53EF\u4EE5\u5728\u63A7\u5236\u53F0\u770B\u5230\u4EE5\u4E0B\u8F93\u51FA\u4FE1\u606F\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/redis-springboot-f4456aea-2e48-4bad-910d-2d963ef0224e.png" alt=""></p><p>\u4E5F\u53EF\u4EE5\u901A\u8FC7 AnotherRedisDesktopManager \u5BA2\u6237\u7AEF\u67E5\u770B Redis \u6570\u636E\u5E93\u4E2D\u7684\u6570\u636E\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/redis-springboot-f7551ebb-0bde-4084-9ab0-4a724d8ad2ec.png" alt=""></p><h2 id="\u7F16\u7A0B\u55B5\u6574\u5408-redis" tabindex="-1"><a class="header-anchor" href="#\u7F16\u7A0B\u55B5\u6574\u5408-redis" aria-hidden="true">#</a> \u7F16\u7A0B\u55B5\u6574\u5408 Redis</h2><p>\u7F16\u7A0B\u55B5\u662F\u4E00\u4E2A Spring Boot + Vue \u7684\u524D\u540E\u7AEF\u5206\u79BB\u9879\u76EE\uFF0C\u8981\u6574\u5408 Redis \u7684\u8BDD\uFF0C\u6700\u597D\u7684\u65B9\u5F0F\u662F\u4F7F\u7528 Spring Cache\uFF0C\u4EC5\u4EC5\u901A\u8FC7 @Cacheable\u3001@CachePut\u3001@CacheEvict\u3001@EnableCaching \u7B49\u6CE8\u89E3\u5C31\u53EF\u4EE5\u8F7B\u677E\u4F7F\u7528 Redis \u505A\u7F13\u5B58\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/redis-springboot-eb6d69d7-9152-4695-87c7-cba138ca93fd.png" alt=""></p><p><strong>1\uFF09@EnableCaching</strong>\uFF0C\u5F00\u542F\u7F13\u5B58\u529F\u80FD\u3002</p><p><strong>2\uFF09@Cacheable</strong>\uFF0C\u8C03\u7528\u65B9\u6CD5\u524D\uFF0C\u53BB\u7F13\u5B58\u4E2D\u627E\uFF0C\u627E\u5230\u5C31\u8FD4\u56DE\uFF0C\u627E\u4E0D\u5230\u5C31\u6267\u884C\u65B9\u6CD5\uFF0C\u5E76\u5C06\u8FD4\u56DE\u503C\u653E\u5230\u7F13\u5B58\u4E2D\u3002</p><p><strong>3\uFF09@CachePut</strong>\uFF0C\u65B9\u6CD5\u8C03\u7528\u524D\u4E0D\u4F1A\u53BB\u7F13\u5B58\u4E2D\u627E\uFF0C\u65E0\u8BBA\u5982\u4F55\u90FD\u4F1A\u6267\u884C\u65B9\u6CD5\uFF0C\u6267\u884C\u5B8C\u5C06\u8FD4\u56DE\u503C\u653E\u5230\u7F13\u5B58\u4E2D\u3002</p><p><strong>4\uFF09@CacheEvict</strong>\uFF0C\u6E05\u7406\u7F13\u5B58\u4E2D\u7684\u4E00\u4E2A\u6216\u591A\u4E2A\u8BB0\u5F55\u3002</p><p>Spring Cache \u662F Spring \u63D0\u4F9B\u7684\u4E00\u5957\u5B8C\u6574\u7684\u7F13\u5B58\u89E3\u51B3\u65B9\u6848\uFF0C\u867D\u7136\u5B83\u672C\u8EAB\u6CA1\u6709\u63D0\u4F9B\u7F13\u5B58\u7684\u5B9E\u73B0\uFF0C\u4F46\u5B83\u63D0\u4F9B\u7684\u4E00\u6574\u5957\u63A5\u53E3\u3001\u89C4\u8303\u3001\u914D\u7F6E\u3001\u6CE8\u89E3\u7B49\uFF0C\u53EF\u4EE5\u8BA9\u6211\u4EEC\u65E0\u7F1D\u8854\u63A5 Redis\u3001Ehcache \u7B49\u7F13\u5B58\u5B9E\u73B0\u3002</p><p>Spring Cache \u7684\u6CE8\u89E3\uFF08\u524D\u9762\u63D0\u5230\u7684\u56DB\u4E2A\uFF09\u4F1A\u5728\u8C03\u7528\u65B9\u6CD5\u4E4B\u540E\uFF0C\u53BB\u7F13\u5B58\u65B9\u6CD5\u8FD4\u56DE\u7684\u6700\u7EC8\u7ED3\u679C\uFF1B\u6216\u8005\u5728\u65B9\u6CD5\u8C03\u7528\u4E4B\u524D\u62FF\u7F13\u5B58\u4E2D\u7684\u7ED3\u679C\uFF0C\u5F53\u7136\u8FD8\u6709\u5220\u9664\u7F13\u5B58\u4E2D\u7684\u7ED3\u679C\u3002</p><p>\u8FD9\u4E9B\u8BFB\u5199\u64CD\u4F5C\u4E0D\u7528\u6211\u4EEC\u624B\u52A8\u518D\u53BB\u5199\u4EE3\u7801\u5B9E\u73B0\u4E86\uFF0C\u76F4\u63A5\u4EA4\u7ED9 Spring Cache \u6765\u6253\u7406\u5C31 OK \u4E86\uFF0C\u662F\u4E0D\u662F\u975E\u5E38\u8D34\u5FC3\uFF1F</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/redis-springboot-afed274d-458d-4e6e-9fd0-b421ac811f47.png" alt=""></p><p><strong>\u7B2C\u4E00\u6B65</strong>\uFF0C\u5728 pom.xml \u6587\u4EF6\u4E2D\u8FFD\u52A0 Redis \u7684 starter\u3002</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
     &lt;groupId&gt;org.springframework.boot&lt;/groupId&gt;
     &lt;artifactId&gt;spring-boot-starter-data-redis&lt;/artifactId&gt;
 &lt;/dependency&gt;
@@ -270,7 +270,7 @@ OK
     <span class="token punctuation">}</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>\u6CE8\u610F\u770B @CachePut \u6CE8\u89E3\u8FD9\u884C\u4EE3\u7801\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token annotation punctuation">@CachePut</span><span class="token punctuation">(</span>value <span class="token operator">=</span> <span class="token string">&quot;codingmore&quot;</span><span class="token punctuation">,</span> key <span class="token operator">=</span> <span class="token string">&quot;&#39;codingmore:postags:&#39;+#postAddTagParam.postTagId&quot;</span><span class="token punctuation">)</span>
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><ul><li>value\uFF1A\u7F13\u5B58\u540D\u79F0\uFF0C\u4E5F\u5C31\u662F\u7F13\u5B58\u7684\u547D\u540D\u7A7A\u95F4\uFF0Cvalue \u8FD9\u91CC\u5E94\u8BE5\u6362\u6210 namespace \u66F4\u597D\u4E00\u70B9\uFF1B</li><li>key\uFF1A\u7528\u4E8E\u5728\u547D\u540D\u7A7A\u95F4\u4E2D\u7F13\u5B58\u7684 key \u503C\uFF0C\u53EF\u4EE5\u4F7F\u7528 SpEL \u8868\u8FBE\u5F0F\uFF0C\u6BD4\u5982\u8BF4 <code>&#39;codingmore:postags:&#39;+#postAddTagParam.postTagId</code>\uFF1B</li><li>\u8FD8\u6709\u4E24\u4E2A\u5C5E\u6027 unless \u548C condition \u6682\u65F6\u6CA1\u7528\u5230\uFF0C\u5206\u522B\u8868\u793A\u6761\u4EF6\u7B26\u5408\u5219\u4E0D\u7F13\u5B58\uFF0C\u6761\u4EF6\u7B26\u5408\u5219\u7F13\u5B58\u3002</li></ul><p><strong>\u7B2C\u4E94\u6B65</strong>\uFF0C\u542F\u52A8\u670D\u52A1\u5668\u7AEF\uFF0C\u542F\u52A8\u5BA2\u6237\u7AEF\uFF0C\u4FEE\u6539\u6807\u7B7E\u8FDB\u884C\u6D4B\u8BD5\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/redis-springboot-6463fdda-6cc2-43f4-91e6-e0de9f0f1c0c.png" alt=""></p><p>\u901A\u8FC7 Red \u5BA2\u6237\u7AEF\uFF08\u4E00\u6B3E macOS \u7248\u7684 Redis \u684C\u9762\u5DE5\u5177\uFF09\uFF0C\u53EF\u4EE5\u770B\u5230\u521A\u521A\u66F4\u65B0\u7684\u8FD4\u56DE\u503C\u5DF2\u7ECF\u6DFB\u52A0\u5230 Redis \u4E2D\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/redis-springboot-468a253d-931a-4e5b-8f7e-36ecc1561dac.png" alt=""></p><h3 id="\u4F7F\u7528-redis-\u8FDE\u63A5\u6C60" tabindex="-1"><a class="header-anchor" href="#\u4F7F\u7528-redis-\u8FDE\u63A5\u6C60" aria-hidden="true">#</a> \u4F7F\u7528 Redis \u8FDE\u63A5\u6C60</h3><p>Redis \u662F\u57FA\u4E8E\u5185\u5B58\u7684\u6570\u636E\u5E93\uFF0C\u672C\u6765\u662F\u4E3A\u4E86\u63D0\u9AD8\u7A0B\u5E8F\u6027\u80FD\u7684\uFF0C\u4F46\u5982\u679C\u4E0D\u4F7F\u7528 Redis \u8FDE\u63A5\u6C60\u7684\u8BDD\uFF0C\u5EFA\u7ACB\u8FDE\u63A5\u3001\u65AD\u5F00\u8FDE\u63A5\u5C31\u9700\u8981\u6D88\u8017\u5927\u91CF\u7684\u65F6\u95F4\u3002</p><p>\u7528\u4E86\u8FDE\u63A5\u6C60\uFF0C\u5C31\u53EF\u4EE5\u5B9E\u73B0\u5728\u5BA2\u6237\u7AEF\u5EFA\u7ACB\u591A\u4E2A\u8FDE\u63A5\uFF0C\u9700\u8981\u7684\u65F6\u5019\u4ECE\u8FDE\u63A5\u6C60\u62FF\uFF0C\u7528\u5B8C\u4E86\u518D\u653E\u56DE\u53BB\uFF0C\u8FD9\u6837\u5C31\u8282\u7701\u4E86\u8FDE\u63A5\u5EFA\u7ACB\u3001\u65AD\u5F00\u7684\u65F6\u95F4\u3002</p><p>\u8981\u4F7F\u7528\u8FDE\u63A5\u6C60\uFF0C\u6211\u4EEC\u5F97\u5148\u4E86\u89E3 Redis \u7684\u5BA2\u6237\u7AEF\uFF0C\u5E38\u7528\u7684\u6709\u4E24\u79CD\uFF1AJedis \u548C Lettuce\u3002</p><ul><li>Jedis\uFF1ASpring Boot 1.5.x \u7248\u672C\u65F6\u9ED8\u8BA4\u7684 Redis \u5BA2\u6237\u7AEF\uFF0C\u5B9E\u73B0\u4E0A\u662F\u76F4\u63A5\u8FDE\u63A5 Redis Server\uFF0C\u5982\u679C\u5728\u591A\u7EBF\u7A0B\u73AF\u5883\u4E0B\u662F\u975E\u7EBF\u7A0B\u5B89\u5168\u7684\uFF0C\u8FD9\u65F6\u5019\u8981\u4F7F\u7528\u8FDE\u63A5\u6C60\u4E3A\u6BCF\u4E2A jedis \u5B9E\u4F8B\u589E\u52A0\u7269\u7406\u8FDE\u63A5\uFF1B</li><li>Lettuce\uFF1ASpring Boot 2.x \u7248\u672C\u540E\u9ED8\u8BA4\u7684 Redis \u5BA2\u6237\u7AEF\uFF0C\u57FA\u4E8E Netty \u5B9E\u73B0\uFF0C\u8FDE\u63A5\u5B9E\u4F8B\u53EF\u4EE5\u5728\u591A\u4E2A\u7EBF\u7A0B\u95F4\u5E76\u53D1\u8BBF\u95EE\uFF0C\u4E00\u4E2A\u8FDE\u63A5\u5B9E\u4F8B\u4E0D\u591F\u7684\u60C5\u51B5\u4E0B\u4E5F\u53EF\u4EE5\u6309\u9700\u8981\u589E\u52A0\u8FDE\u63A5\u5B9E\u4F8B\u3002</li></ul><p>\u5B83\u4FE9\u5728 GitHub \u4E0A\u90FD\u633A\u53D7\u6B22\u8FCE\u7684\uFF0C\u5927\u5BB6\u53EF\u4EE5\u6309\u9700\u9009\u7528\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/redis-springboot-c94651b5-1e53-42e5-ad5f-162b4bf509a7.png" alt=""></p><p>\u6211\u8FD9\u91CC\u628A\u4E24\u79CD\u5BA2\u6237\u7AEF\u7684\u60C5\u51B5\u90FD\u6F14\u793A\u4E00\u4E0B\uFF0C\u65B9\u4FBF\u5C0F\u4F19\u4F34\u4EEC\u53C2\u8003\u3002</p><p><strong>1\uFF09Lettuce</strong></p><p><strong>\u7B2C\u4E00\u6B65</strong>\uFF0C\u4FEE\u6539 application-dev.yml\uFF0C\u6DFB\u52A0 Lettuce \u8FDE\u63A5\u6C60\u914D\u7F6E\uFF08pool \u8282\u70B9\uFF09\u3002</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>spring:
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><ul><li>value\uFF1A\u7F13\u5B58\u540D\u79F0\uFF0C\u4E5F\u5C31\u662F\u7F13\u5B58\u7684\u547D\u540D\u7A7A\u95F4\uFF0Cvalue \u8FD9\u91CC\u5E94\u8BE5\u6362\u6210 namespace \u66F4\u597D\u4E00\u70B9\uFF1B</li><li>key\uFF1A\u7528\u4E8E\u5728\u547D\u540D\u7A7A\u95F4\u4E2D\u7F13\u5B58\u7684 key \u503C\uFF0C\u53EF\u4EE5\u4F7F\u7528 SpEL \u8868\u8FBE\u5F0F\uFF0C\u6BD4\u5982\u8BF4 <code>&#39;codingmore:postags:&#39;+#postAddTagParam.postTagId</code>\uFF1B</li><li>\u8FD8\u6709\u4E24\u4E2A\u5C5E\u6027 unless \u548C condition \u6682\u65F6\u6CA1\u7528\u5230\uFF0C\u5206\u522B\u8868\u793A\u6761\u4EF6\u7B26\u5408\u5219\u4E0D\u7F13\u5B58\uFF0C\u6761\u4EF6\u7B26\u5408\u5219\u7F13\u5B58\u3002</li></ul><p><strong>\u7B2C\u4E94\u6B65</strong>\uFF0C\u542F\u52A8\u670D\u52A1\u5668\u7AEF\uFF0C\u542F\u52A8\u5BA2\u6237\u7AEF\uFF0C\u4FEE\u6539\u6807\u7B7E\u8FDB\u884C\u6D4B\u8BD5\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/redis-springboot-6463fdda-6cc2-43f4-91e6-e0de9f0f1c0c.png" alt=""></p><p>\u901A\u8FC7 Red \u5BA2\u6237\u7AEF\uFF08\u4E00\u6B3E macOS \u7248\u7684 Redis \u684C\u9762\u5DE5\u5177\uFF09\uFF0C\u53EF\u4EE5\u770B\u5230\u521A\u521A\u66F4\u65B0\u7684\u8FD4\u56DE\u503C\u5DF2\u7ECF\u6DFB\u52A0\u5230 Redis \u4E2D\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/redis-springboot-468a253d-931a-4e5b-8f7e-36ecc1561dac.png" alt=""></p><h2 id="\u4F7F\u7528-redis-\u8FDE\u63A5\u6C60" tabindex="-1"><a class="header-anchor" href="#\u4F7F\u7528-redis-\u8FDE\u63A5\u6C60" aria-hidden="true">#</a> \u4F7F\u7528 Redis \u8FDE\u63A5\u6C60</h2><p>Redis \u662F\u57FA\u4E8E\u5185\u5B58\u7684\u6570\u636E\u5E93\uFF0C\u672C\u6765\u662F\u4E3A\u4E86\u63D0\u9AD8\u7A0B\u5E8F\u6027\u80FD\u7684\uFF0C\u4F46\u5982\u679C\u4E0D\u4F7F\u7528 Redis \u8FDE\u63A5\u6C60\u7684\u8BDD\uFF0C\u5EFA\u7ACB\u8FDE\u63A5\u3001\u65AD\u5F00\u8FDE\u63A5\u5C31\u9700\u8981\u6D88\u8017\u5927\u91CF\u7684\u65F6\u95F4\u3002</p><p>\u7528\u4E86\u8FDE\u63A5\u6C60\uFF0C\u5C31\u53EF\u4EE5\u5B9E\u73B0\u5728\u5BA2\u6237\u7AEF\u5EFA\u7ACB\u591A\u4E2A\u8FDE\u63A5\uFF0C\u9700\u8981\u7684\u65F6\u5019\u4ECE\u8FDE\u63A5\u6C60\u62FF\uFF0C\u7528\u5B8C\u4E86\u518D\u653E\u56DE\u53BB\uFF0C\u8FD9\u6837\u5C31\u8282\u7701\u4E86\u8FDE\u63A5\u5EFA\u7ACB\u3001\u65AD\u5F00\u7684\u65F6\u95F4\u3002</p><p>\u8981\u4F7F\u7528\u8FDE\u63A5\u6C60\uFF0C\u6211\u4EEC\u5F97\u5148\u4E86\u89E3 Redis \u7684\u5BA2\u6237\u7AEF\uFF0C\u5E38\u7528\u7684\u6709\u4E24\u79CD\uFF1AJedis \u548C Lettuce\u3002</p><ul><li>Jedis\uFF1ASpring Boot 1.5.x \u7248\u672C\u65F6\u9ED8\u8BA4\u7684 Redis \u5BA2\u6237\u7AEF\uFF0C\u5B9E\u73B0\u4E0A\u662F\u76F4\u63A5\u8FDE\u63A5 Redis Server\uFF0C\u5982\u679C\u5728\u591A\u7EBF\u7A0B\u73AF\u5883\u4E0B\u662F\u975E\u7EBF\u7A0B\u5B89\u5168\u7684\uFF0C\u8FD9\u65F6\u5019\u8981\u4F7F\u7528\u8FDE\u63A5\u6C60\u4E3A\u6BCF\u4E2A jedis \u5B9E\u4F8B\u589E\u52A0\u7269\u7406\u8FDE\u63A5\uFF1B</li><li>Lettuce\uFF1ASpring Boot 2.x \u7248\u672C\u540E\u9ED8\u8BA4\u7684 Redis \u5BA2\u6237\u7AEF\uFF0C\u57FA\u4E8E Netty \u5B9E\u73B0\uFF0C\u8FDE\u63A5\u5B9E\u4F8B\u53EF\u4EE5\u5728\u591A\u4E2A\u7EBF\u7A0B\u95F4\u5E76\u53D1\u8BBF\u95EE\uFF0C\u4E00\u4E2A\u8FDE\u63A5\u5B9E\u4F8B\u4E0D\u591F\u7684\u60C5\u51B5\u4E0B\u4E5F\u53EF\u4EE5\u6309\u9700\u8981\u589E\u52A0\u8FDE\u63A5\u5B9E\u4F8B\u3002</li></ul><p>\u5B83\u4FE9\u5728 GitHub \u4E0A\u90FD\u633A\u53D7\u6B22\u8FCE\u7684\uFF0C\u5927\u5BB6\u53EF\u4EE5\u6309\u9700\u9009\u7528\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/redis-springboot-c94651b5-1e53-42e5-ad5f-162b4bf509a7.png" alt=""></p><p>\u6211\u8FD9\u91CC\u628A\u4E24\u79CD\u5BA2\u6237\u7AEF\u7684\u60C5\u51B5\u90FD\u6F14\u793A\u4E00\u4E0B\uFF0C\u65B9\u4FBF\u5C0F\u4F19\u4F34\u4EEC\u53C2\u8003\u3002</p><p><strong>1\uFF09Lettuce</strong></p><p><strong>\u7B2C\u4E00\u6B65</strong>\uFF0C\u4FEE\u6539 application-dev.yml\uFF0C\u6DFB\u52A0 Lettuce \u8FDE\u63A5\u6C60\u914D\u7F6E\uFF08pool \u8282\u70B9\uFF09\u3002</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>spring:
     redis:
         lettuce:
           pool:
@@ -314,7 +314,7 @@ OK
             max-idle: 8 # \u8FDE\u63A5\u6C60\u6700\u5927\u7A7A\u95F2\u8FDE\u63A5\u6570
             min-idle: 0 # \u8FDE\u63A5\u6C60\u6700\u5C0F\u7A7A\u95F2\u8FDE\u63A5\u6570
             max-wait: -1ms # \u8FDE\u63A5\u6C60\u6700\u5927\u963B\u585E\u7B49\u5F85\u65F6\u95F4\uFF0C\u8D1F\u503C\u8868\u793A\u6CA1\u6709\u9650\u5236
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>\u542F\u52A8\u670D\u52A1\u540E\uFF0C\u89C2\u5BDF redisTemplate \u7684 clientConfiguration \u8282\u70B9\uFF0C\u53EF\u4EE5\u770B\u5230\u5B83\u7684\u503C\u5DF2\u7ECF\u53D8\u6210 DefaultJedisClientConfiguration \u5BF9\u8C61\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/redis-springboot-01aa7dc6-b9f7-46bd-b8a4-0a24e44185bc.png" alt=""></p><p>\u5F53\u7136\u4E86\uFF0C\u4E5F\u53EF\u4EE5\u4E0D\u914D\u7F6E Jedis \u5BA2\u6237\u7AEF\u7684\u8FDE\u63A5\u6C60\uFF0C\u8D70\u9ED8\u8BA4\u7684\u8FDE\u63A5\u6C60\u914D\u7F6E\u3002\u56E0\u4E3A Jedis \u5BA2\u6237\u7AEF\u9ED8\u8BA4\u589E\u52A0\u4E86\u8FDE\u63A5\u6C60\u7684\u4F9D\u8D56\u5305\uFF0C\u5728 pom.xml \u6587\u4EF6\u4E2D\u70B9\u5F00 Jedis \u5BA2\u6237\u7AEF\u4F9D\u8D56\u53EF\u4EE5\u67E5\u770B\u5230\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/redis-springboot-c87d8e02-aace-4d86-8011-13e4087956e0.png" alt=""></p><h3 id="\u81EA\u7531\u64CD\u4F5C-redis" tabindex="-1"><a class="header-anchor" href="#\u81EA\u7531\u64CD\u4F5C-redis" aria-hidden="true">#</a> \u81EA\u7531\u64CD\u4F5C Redis</h3><p>Spring Cache \u867D\u7136\u63D0\u4F9B\u4E86\u64CD\u4F5C Redis \u7684\u4FBF\u6377\u65B9\u6CD5\uFF0C\u6BD4\u5982\u6211\u4EEC\u524D\u9762\u6F14\u793A\u7684 @CachePut \u6CE8\u89E3\uFF0C\u4F46\u6CE8\u89E3\u63D0\u4F9B\u7684\u64CD\u4F5C\u975E\u5E38\u6709\u9650\uFF0C\u6BD4\u5982\u8BF4\u5B83\u53EA\u80FD\u4FDD\u5B58\u8FD4\u56DE\u503C\u5230\u7F13\u5B58\u4E2D\uFF0C\u800C\u8FD4\u56DE\u503C\u5E76\u4E0D\u4E00\u5B9A\u662F\u6211\u4EEC\u60F3\u8981\u4FDD\u5B58\u7684\u7ED3\u679C\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/redis-springboot-f28a3b84-ed0b-4a78-a5e5-5803bae967be.png" alt=""></p><p>\u4E0E\u5176\u4FDD\u5B58\u8FD9\u4E2A\u8FD4\u56DE\u7ED9\u5BA2\u6237\u7AEF\u7684 JSON \u4FE1\u606F\uFF0C\u6211\u4EEC\u66F4\u60F3\u4FDD\u5B58\u7684\u662F\u66F4\u65B0\u540E\u7684\u6807\u7B7E\u3002\u90A3\u8BE5\u600E\u4E48\u81EA\u7531\u5730\u64CD\u4F5C Redis \u5462\uFF1F</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/redis-springboot-9b89af51-c2fd-4b2d-ba57-a59efa4cbffd.png" alt=""></p><p><strong>\u7B2C\u4E00\u6B65</strong>\uFF0C\u589E\u52A0 RedisService \u63A5\u53E3\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">interface</span> <span class="token class-name">RedisService</span> <span class="token punctuation">{</span>
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>\u542F\u52A8\u670D\u52A1\u540E\uFF0C\u89C2\u5BDF redisTemplate \u7684 clientConfiguration \u8282\u70B9\uFF0C\u53EF\u4EE5\u770B\u5230\u5B83\u7684\u503C\u5DF2\u7ECF\u53D8\u6210 DefaultJedisClientConfiguration \u5BF9\u8C61\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/redis-springboot-01aa7dc6-b9f7-46bd-b8a4-0a24e44185bc.png" alt=""></p><p>\u5F53\u7136\u4E86\uFF0C\u4E5F\u53EF\u4EE5\u4E0D\u914D\u7F6E Jedis \u5BA2\u6237\u7AEF\u7684\u8FDE\u63A5\u6C60\uFF0C\u8D70\u9ED8\u8BA4\u7684\u8FDE\u63A5\u6C60\u914D\u7F6E\u3002\u56E0\u4E3A Jedis \u5BA2\u6237\u7AEF\u9ED8\u8BA4\u589E\u52A0\u4E86\u8FDE\u63A5\u6C60\u7684\u4F9D\u8D56\u5305\uFF0C\u5728 pom.xml \u6587\u4EF6\u4E2D\u70B9\u5F00 Jedis \u5BA2\u6237\u7AEF\u4F9D\u8D56\u53EF\u4EE5\u67E5\u770B\u5230\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/redis-springboot-c87d8e02-aace-4d86-8011-13e4087956e0.png" alt=""></p><h2 id="\u81EA\u7531\u64CD\u4F5C-redis" tabindex="-1"><a class="header-anchor" href="#\u81EA\u7531\u64CD\u4F5C-redis" aria-hidden="true">#</a> \u81EA\u7531\u64CD\u4F5C Redis</h2><p>Spring Cache \u867D\u7136\u63D0\u4F9B\u4E86\u64CD\u4F5C Redis \u7684\u4FBF\u6377\u65B9\u6CD5\uFF0C\u6BD4\u5982\u6211\u4EEC\u524D\u9762\u6F14\u793A\u7684 @CachePut \u6CE8\u89E3\uFF0C\u4F46\u6CE8\u89E3\u63D0\u4F9B\u7684\u64CD\u4F5C\u975E\u5E38\u6709\u9650\uFF0C\u6BD4\u5982\u8BF4\u5B83\u53EA\u80FD\u4FDD\u5B58\u8FD4\u56DE\u503C\u5230\u7F13\u5B58\u4E2D\uFF0C\u800C\u8FD4\u56DE\u503C\u5E76\u4E0D\u4E00\u5B9A\u662F\u6211\u4EEC\u60F3\u8981\u4FDD\u5B58\u7684\u7ED3\u679C\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/redis-springboot-f28a3b84-ed0b-4a78-a5e5-5803bae967be.png" alt=""></p><p>\u4E0E\u5176\u4FDD\u5B58\u8FD9\u4E2A\u8FD4\u56DE\u7ED9\u5BA2\u6237\u7AEF\u7684 JSON \u4FE1\u606F\uFF0C\u6211\u4EEC\u66F4\u60F3\u4FDD\u5B58\u7684\u662F\u66F4\u65B0\u540E\u7684\u6807\u7B7E\u3002\u90A3\u8BE5\u600E\u4E48\u81EA\u7531\u5730\u64CD\u4F5C Redis \u5462\uFF1F</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/redis-springboot-9b89af51-c2fd-4b2d-ba57-a59efa4cbffd.png" alt=""></p><p><strong>\u7B2C\u4E00\u6B65</strong>\uFF0C\u589E\u52A0 RedisService \u63A5\u53E3\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">interface</span> <span class="token class-name">RedisService</span> <span class="token punctuation">{</span>
 
     <span class="token doc-comment comment">/**
      * \u4FDD\u5B58\u5C5E\u6027
@@ -358,4 +358,4 @@ OK
 
     <span class="token comment">// \u66F4\u591A\u4EE3\u7801\u53C2\u8003\uFF1Ahttps://github.com/itwanger/coding-more/blob/main/codingmore-mbg/src/main/java/com/codingmore/service/impl/RedisServiceImpl.java</span>
 <span class="token punctuation">}</span>
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p><strong>\u7B2C\u4E09\u6B65</strong>\uFF0C\u5728\u6807\u7B7E PostTagController \u4E2D\u589E\u52A0 Redis \u6D4B\u8BD5\u7528\u63A5\u53E3 simpleTest \uFF1A</p><hr>`,99),W=s("\u66F4\u591A\u5185\u5BB9\uFF0C\u53EA\u9488\u5BF9\u300AJava \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF\u300B\u661F\u7403\u7528\u6237\u5F00\u653E\uFF0C\u9700\u8981\u7684\u5C0F\u4F19\u4F34\u53EF\u4EE5"),H=s("\u6233\u94FE\u63A5\u{1F517}"),K=s("\u52A0\u5165\u6211\u4EEC\u7684\u661F\u7403\uFF0C\u4E00\u8D77\u5B66\u4E60\uFF0C\u4E00\u8D77\u5377\u3002\u3002"),U=n("strong",null,"\u7F16\u7A0B\u55B5",-1),G=s("\u{1F431}\u662F\u4E00\u4E2A Spring Boot+Vue \u7684\u524D\u540E\u7AEF\u5206\u79BB\u9879\u76EE\uFF0C\u878D\u5408\u4E86\u5E02\u9762\u4E0A\u7EDD\u5927\u591A\u6570\u6D41\u884C\u7684\u6280\u672F\u8981\u70B9\u3002\u901A\u8FC7\u5B66\u4E60\u5B9E\u6218\u9879\u76EE\uFF0C\u4F60\u53EF\u4EE5\u5C06\u6240\u5B66\u7684\u77E5\u8BC6\u901A\u8FC7\u5B9E\u8DF5\u8FDB\u884C\u68C0\u9A8C\u3001\u4F60\u53EF\u4EE5\u62D3\u5BBD\u81EA\u5DF1\u7684\u6280\u672F\u8FB9\u754C\uFF0C\u4F60\u53EF\u4EE5\u638C\u63E1\u4E00\u4E2A\u771F\u6B63\u7684\u5B9E\u6218\u9879\u76EE\u662F\u5982\u4F55\u4ECE 0 \u5230 1 \u7684\u3002"),Y=n("hr",null,null,-1),Z=n("h3",{id:"\u9879\u76EE\u6E90\u7801",tabindex:"-1"},[n("a",{class:"header-anchor",href:"#\u9879\u76EE\u6E90\u7801","aria-hidden":"true"},"#"),s(" \u9879\u76EE\u6E90\u7801")],-1),Q=s("\u7F16\u7A0B\u55B5\uFF1A"),X={href:"https://github.com/itwanger/coding-more",target:"_blank",rel:"noopener noreferrer"},$=s("https://github.com/itwanger/coding-more"),nn=s("\u6574\u5408 Redis \u4E13\u7528\uFF1A"),sn={href:"https://github.com/itwanger/codingmore-learning/tree/main/codingmore-redis",target:"_blank",rel:"noopener noreferrer"},an=s("https://github.com/itwanger/coding-more"),en=n("p",null,[n("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png",alt:""})],-1);function tn(pn,cn){const e=t("ExternalLinkIcon"),i=t("RouterLink");return c(),o("div",null,[r,v,m,k,b,n("blockquote",null,[n("p",null,[g,n("a",h,[f,a(e)])])]),_,y,R,x,n("p",null,[j,n("a",S,[w,a(e)]),T,C,q]),I,O,z,P,n("blockquote",null,[n("p",null,[n("a",L,[A,a(e)])])]),F,V,B,J,n("blockquote",null,[n("p",null,[M,n("a",D,[E,a(e)])])]),N,n("p",null,[W,a(i,{to:"/redis/docs/zhishixingqiu/"},{default:l(()=>[H]),_:1}),K,U,G]),Y,Z,n("blockquote",null,[n("ul",null,[n("li",null,[Q,n("a",X,[$,a(e)])]),n("li",null,[nn,n("a",sn,[an,a(e)])])])]),en])}var un=p(d,[["render",tn],["__file","redis-springboot.html.vue"]]);export{un as default};
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p><strong>\u7B2C\u4E09\u6B65</strong>\uFF0C\u5728\u6807\u7B7E PostTagController \u4E2D\u589E\u52A0 Redis \u6D4B\u8BD5\u7528\u63A5\u53E3 simpleTest \uFF1A</p><hr>`,99),E=s("\u66F4\u591A\u5185\u5BB9\uFF0C\u53EA\u9488\u5BF9\u300AJava \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF\u300B\u661F\u7403\u7528\u6237\u5F00\u653E\uFF0C\u9700\u8981\u7684\u5C0F\u4F19\u4F34\u53EF\u4EE5"),N={href:"https://tobebetterjavaer.com/zhishixingqiu/",target:"_blank",rel:"noopener noreferrer"},W=s("\u6233\u94FE\u63A5\u{1F517}"),H=s("\u52A0\u5165\u6211\u4EEC\u7684\u661F\u7403\uFF0C\u4E00\u8D77\u5B66\u4E60\uFF0C\u4E00\u8D77\u5377\u3002\u3002"),K=n("strong",null,"\u7F16\u7A0B\u55B5",-1),U=s("\u{1F431}\u662F\u4E00\u4E2A Spring Boot+Vue \u7684\u524D\u540E\u7AEF\u5206\u79BB\u9879\u76EE\uFF0C\u878D\u5408\u4E86\u5E02\u9762\u4E0A\u7EDD\u5927\u591A\u6570\u6D41\u884C\u7684\u6280\u672F\u8981\u70B9\u3002\u901A\u8FC7\u5B66\u4E60\u5B9E\u6218\u9879\u76EE\uFF0C\u4F60\u53EF\u4EE5\u5C06\u6240\u5B66\u7684\u77E5\u8BC6\u901A\u8FC7\u5B9E\u8DF5\u8FDB\u884C\u68C0\u9A8C\u3001\u4F60\u53EF\u4EE5\u62D3\u5BBD\u81EA\u5DF1\u7684\u6280\u672F\u8FB9\u754C\uFF0C\u4F60\u53EF\u4EE5\u638C\u63E1\u4E00\u4E2A\u771F\u6B63\u7684\u5B9E\u6218\u9879\u76EE\u662F\u5982\u4F55\u4ECE 0 \u5230 1 \u7684\u3002"),G=n("hr",null,null,-1),Y=n("h2",{id:"\u9879\u76EE\u6E90\u7801",tabindex:"-1"},[n("a",{class:"header-anchor",href:"#\u9879\u76EE\u6E90\u7801","aria-hidden":"true"},"#"),s(" \u9879\u76EE\u6E90\u7801")],-1),Z=s("\u7F16\u7A0B\u55B5\uFF1A"),Q={href:"https://github.com/itwanger/coding-more",target:"_blank",rel:"noopener noreferrer"},X=s("https://github.com/itwanger/coding-more"),$=s("\u6574\u5408 Redis \u4E13\u7528\uFF1A"),nn={href:"https://github.com/itwanger/codingmore-learning/tree/main/codingmore-redis",target:"_blank",rel:"noopener noreferrer"},sn=s("https://github.com/itwanger/coding-more"),an=n("p",null,[n("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png",alt:""})],-1);function en(tn,pn){const a=i("ExternalLinkIcon");return p(),c("div",null,[u,d,r,v,m,n("blockquote",null,[n("p",null,[k,n("a",b,[g,e(a)])])]),h,f,_,y,n("p",null,[R,n("a",x,[j,e(a)]),S,w,T]),C,q,I,O,n("blockquote",null,[n("p",null,[n("a",z,[P,e(a)])])]),A,L,F,V,n("blockquote",null,[n("p",null,[B,n("a",J,[M,e(a)])])]),D,n("p",null,[E,n("a",N,[W,e(a)]),H,K,U]),G,Y,n("blockquote",null,[n("ul",null,[n("li",null,[Z,n("a",Q,[X,e(a)])]),n("li",null,[$,n("a",nn,[sn,e(a)])])])]),an])}var ln=t(l,[["render",en],["__file","redis-springboot.html.vue"]]);export{ln as default};
diff --git a/dist/assets/redis-springboot.html.5e59844d.js b/dist/assets/redis-springboot.html.44044d02.js
similarity index 73%
rename from dist/assets/redis-springboot.html.5e59844d.js
rename to dist/assets/redis-springboot.html.44044d02.js
index 1aa22989..aa58f3e2 100644
--- a/dist/assets/redis-springboot.html.5e59844d.js
+++ b/dist/assets/redis-springboot.html.44044d02.js
@@ -1 +1 @@
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diff --git a/dist/assets/redis.html.7543ed9c.js b/dist/assets/redis.html.bcbe4235.js
similarity index 99%
rename from dist/assets/redis.html.7543ed9c.js
rename to dist/assets/redis.html.bcbe4235.js
index bc6f815b..054d0d7d 100644
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+++ b/dist/assets/redis.html.bcbe4235.js
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noreferrer"},m=e("\u539F\u6587\u94FE\u63A5"),k=e("\u3002"),f=p(`<h2 id="\u57FA\u7840" tabindex="-1"><a class="header-anchor" href="#\u57FA\u7840" aria-hidden="true">#</a> \u57FA\u7840</h2><h3 id="_1-\u8BF4\u8BF4\u4EC0\u4E48\u662Fredis" tabindex="-1"><a class="header-anchor" href="#_1-\u8BF4\u8BF4\u4EC0\u4E48\u662Fredis" aria-hidden="true">#</a> 1.\u8BF4\u8BF4\u4EC0\u4E48\u662FRedis?</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-96e079f9-49a3-4c55-b0a4-47d043732b62.png" alt="Redis\u56FE\u6807"></p><p>Redis\u662F\u4E00\u79CD\u57FA\u4E8E\u952E\u503C\u5BF9\uFF08key-value\uFF09\u7684NoSQL\u6570\u636E\u5E93\u3002</p><p>\u6BD4\u4E00\u822C\u952E\u503C\u5BF9\u6570\u636E\u5E93\u5F3A\u5927\u7684\u5730\u65B9\uFF0CRedis\u4E2D\u7684value\u652F\u6301string\uFF08\u5B57\u7B26\u4E32\uFF09\u3001hash\uFF08\u54C8\u5E0C\uFF09\u3001 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id="_2-redis\u53EF\u4EE5\u7528\u6765\u5E72\u4EC0\u4E48" tabindex="-1"><a class="header-anchor" href="#_2-redis\u53EF\u4EE5\u7528\u6765\u5E72\u4EC0\u4E48" aria-hidden="true">#</a> 2.Redis\u53EF\u4EE5\u7528\u6765\u5E72\u4EC0\u4E48\uFF1F</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-b02e44b3-3299-450f-b767-4a862b5ac8ff.png" alt="Redis"></p><ol><li><p>\u7F13\u5B58</p><p>\u8FD9\u662FRedis\u5E94\u7528\u6700\u5E7F\u6CDB\u5730\u65B9\uFF0C\u57FA\u672C\u6240\u6709\u7684Web\u5E94\u7528\u90FD\u4F1A\u4F7F\u7528Redis\u4F5C\u4E3A\u7F13\u5B58\uFF0C\u6765\u964D\u4F4E\u6570\u636E\u6E90\u538B\u529B\uFF0C\u63D0\u9AD8\u54CD\u5E94\u901F\u5EA6\u3002 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-d44c2397-5994-452f-8b7b-eb85d2b87685.png" alt="Redis\u7F13\u5B58"></p></li><li><p>\u8BA1\u6570\u5668 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\u5206\u5E03\u5F0F\u73AF\u5883\u4E0B\uFF0C\u5229\u7528Redis\u5B9E\u73B0\u5206\u5E03\u5F0F\u9501\uFF0C\u4E5F\u662FRedis\u5E38\u89C1\u7684\u5E94\u7528\u3002</p></li></ol><p>Redis\u7684\u5E94\u7528\u4E00\u822C\u4F1A\u7ED3\u5408\u9879\u76EE\u53BB\u95EE\uFF0C\u4EE5\u4E00\u4E2A\u7535\u5546\u9879\u76EE\u7684\u7528\u6237\u670D\u52A1\u4E3A\u4F8B\uFF1A</p><ul><li>Token\u5B58\u50A8\uFF1A\u7528\u6237\u767B\u5F55\u6210\u529F\u4E4B\u540E\uFF0C\u4F7F\u7528Redis\u5B58\u50A8Token</li><li>\u767B\u5F55\u5931\u8D25\u6B21\u6570\u8BA1\u6570\uFF1A\u4F7F\u7528Redis\u8BA1\u6570\uFF0C\u767B\u5F55\u5931\u8D25\u8D85\u8FC7\u4E00\u5B9A\u6B21\u6570\uFF0C\u9501\u5B9A\u8D26\u53F7</li><li>\u5730\u5740\u7F13\u5B58\uFF1A\u5BF9\u7701\u5E02\u533A\u6570\u636E\u7684\u7F13\u5B58</li><li>\u5206\u5E03\u5F0F\u9501\uFF1A\u5206\u5E03\u5F0F\u73AF\u5883\u4E0B\u767B\u5F55\u3001\u6CE8\u518C\u7B49\u64CD\u4F5C\u52A0\u5206\u5E03\u5F0F\u9501</li><li>\u2026\u2026</li></ul><h3 id="_3-redis-\u6709\u54EA\u4E9B\u6570\u636E\u7ED3\u6784" tabindex="-1"><a class="header-anchor" href="#_3-redis-\u6709\u54EA\u4E9B\u6570\u636E\u7ED3\u6784" aria-hidden="true">#</a> 3.Redis \u6709\u54EA\u4E9B\u6570\u636E\u7ED3\u6784\uFF1F</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-10434dc7-c7a3-4c1a-b484-de3fb37669ee.png" alt="Redis\u57FA\u672C\u6570\u636E\u7ED3\u6784"> Redis\u6709\u4E94\u79CD\u57FA\u672C\u6570\u636E\u7ED3\u6784\u3002</p><p><strong>string</strong></p><p>\u5B57\u7B26\u4E32\u6700\u57FA\u7840\u7684\u6570\u636E\u7ED3\u6784\u3002\u5B57\u7B26\u4E32\u7C7B\u578B\u7684\u503C\u5B9E\u9645\u53EF\u4EE5\u662F\u5B57\u7B26\u4E32\uFF08\u7B80\u5355\u7684\u5B57\u7B26\u4E32\u3001\u590D\u6742\u7684\u5B57\u7B26\u4E32\uFF08\u4F8B\u5982JSON\u3001XML\uFF09\uFF09\u3001\u6570\u5B57 \uFF08\u6574\u6570\u3001\u6D6E\u70B9\u6570\uFF09\uFF0C\u751A\u81F3\u662F\u4E8C\u8FDB\u5236\uFF08\u56FE\u7247\u3001\u97F3\u9891\u3001\u89C6\u9891\uFF09\uFF0C\u4F46\u662F\u503C\u6700\u5927\u4E0D\u80FD\u8D85\u8FC7512MB\u3002</p><p>\u5B57\u7B26\u4E32\u4E3B\u8981\u6709\u4EE5\u4E0B\u51E0\u4E2A\u5178\u578B\u4F7F\u7528\u573A\u666F\uFF1A</p><ul><li>\u7F13\u5B58\u529F\u80FD</li><li>\u8BA1\u6570</li><li>\u5171\u4EABSession</li><li>\u9650\u901F</li></ul><p><strong>hash</strong></p><p>\u54C8\u5E0C\u7C7B\u578B\u662F\u6307\u952E\u503C\u672C\u8EAB\u53C8\u662F\u4E00\u4E2A\u952E\u503C\u5BF9\u7ED3\u6784\u3002</p><p>\u54C8\u5E0C\u4E3B\u8981\u6709\u4EE5\u4E0B\u5178\u578B\u5E94\u7528\u573A\u666F\uFF1A</p><ul><li>\u7F13\u5B58\u7528\u6237\u4FE1\u606F</li><li>\u7F13\u5B58\u5BF9\u8C61</li></ul><p><strong>list</strong></p><p>\u5217\u8868\uFF08list\uFF09\u7C7B\u578B\u662F\u7528\u6765\u5B58\u50A8\u591A\u4E2A\u6709\u5E8F\u7684\u5B57\u7B26\u4E32\u3002\u5217\u8868\u662F\u4E00\u79CD\u6BD4\u8F83\u7075\u6D3B\u7684\u6570\u636E\u7ED3\u6784\uFF0C\u5B83\u53EF\u4EE5\u5145\u5F53\u6808\u548C\u961F\u5217\u7684\u89D2\u8272</p><p>\u5217\u8868\u4E3B\u8981\u6709\u4EE5\u4E0B\u51E0\u79CD\u4F7F\u7528\u573A\u666F\uFF1A</p><ul><li>\u6D88\u606F\u961F\u5217</li><li>\u6587\u7AE0\u5217\u8868</li></ul><p><strong>set</strong></p><p>\u96C6\u5408\uFF08set\uFF09\u7C7B\u578B\u4E5F\u662F\u7528\u6765\u4FDD\u5B58\u591A\u4E2A\u7684\u5B57\u7B26\u4E32\u5143\u7D20\uFF0C\u4F46\u548C\u5217\u8868\u7C7B\u578B\u4E0D\u4E00 \u6837\u7684\u662F\uFF0C\u96C6\u5408\u4E2D\u4E0D\u5141\u8BB8\u6709\u91CD\u590D\u5143\u7D20\uFF0C\u5E76\u4E14\u96C6\u5408\u4E2D\u7684\u5143\u7D20\u662F\u65E0\u5E8F\u7684\u3002</p><p>\u96C6\u5408\u4E3B\u8981\u6709\u5982\u4E0B\u4F7F\u7528\u573A\u666F\uFF1A</p><ul><li>\u6807\u7B7E\uFF08tag\uFF09</li><li>\u5171\u540C\u5173\u6CE8</li></ul><p><strong>sorted set</strong></p><p>\u6709\u5E8F\u96C6\u5408\u4E2D\u7684\u5143\u7D20\u53EF\u4EE5\u6392\u5E8F\u3002\u4F46\u662F\u5B83\u548C\u5217\u8868\u4F7F\u7528\u7D22\u5F15\u4E0B\u6807\u4F5C\u4E3A\u6392\u5E8F\u4F9D\u636E\u4E0D\u540C\u7684\u662F\uFF0C\u5B83\u7ED9\u6BCF\u4E2A\u5143\u7D20\u8BBE\u7F6E\u4E00\u4E2A\u6743\u91CD\uFF08score\uFF09\u4F5C\u4E3A\u6392\u5E8F\u7684\u4F9D\u636E\u3002</p><p>\u6709\u5E8F\u96C6\u5408\u4E3B\u8981\u5E94\u7528\u573A\u666F\uFF1A</p><ul><li>\u7528\u6237\u70B9\u8D5E\u7EDF\u8BA1</li><li>\u7528\u6237\u6392\u5E8F</li></ul><h3 id="_4-redis\u4E3A\u4EC0\u4E48\u5FEB\u5462" tabindex="-1"><a class="header-anchor" href="#_4-redis\u4E3A\u4EC0\u4E48\u5FEB\u5462" aria-hidden="true">#</a> 4.Redis\u4E3A\u4EC0\u4E48\u5FEB\u5462\uFF1F</h3><p>Redis\u7684\u901F\u5EA6\u2FAE\u5E38\u7684\u5FEB\uFF0C\u5355\u673A\u7684Redis\u5C31\u53EF\u4EE5\u2F40\u6491\u6BCF\u79D2\u5341\u51E0\u4E07\u7684\u5E76\u53D1\uFF0C\u76F8\u5BF9\u4E8EMySQL\u6765\u8BF4\uFF0C\u6027\u80FD\u662FMySQL\u7684\u2F0F\u2F17\u500D\u3002\u901F\u5EA6\u5FEB\u7684\u539F\u56E0\u4E3B\u8981\u6709\u2F0F\u70B9\uFF1A</p><ol><li><strong>\u5B8C\u5168\u57FA\u4E8E\u5185\u5B58\u64CD\u4F5C</strong></li><li>\u4F7F\u2F64\u5355\u7EBF\u7A0B\uFF0C\u907F\u514D\u4E86\u7EBF\u7A0B\u5207\u6362\u548C\u7ADE\u6001\u4EA7\u751F\u7684\u6D88\u8017</li><li>\u57FA\u4E8E\u2FAE\u963B\u585E\u7684IO\u591A\u8DEF\u590D\u2F64\u673A\u5236</li><li>C\u8BED\u2F94\u5B9E\u73B0\uFF0C\u4F18\u5316\u8FC7\u7684\u6570\u636E\u7ED3\u6784\uFF0C\u57FA\u4E8E\u2F0F\u79CD\u57FA\u7840\u7684\u6570\u636E\u7ED3\u6784\uFF0Credis\u505A\u4E86\u2F24\u91CF\u7684\u4F18\u5316\uFF0C\u6027\u80FD\u6781\u2FBC <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-e05bca61-4600-495c-b92a-25ac822e034e.png" alt="Redis\u4F7F\u7528IO\u591A\u8DEF\u590D\u7528\u548C\u81EA\u8EAB\u4E8B\u4EF6\u6A21\u578B"></li></ol><h3 id="_5-\u80FD\u8BF4\u4E00\u4E0Bi-o\u591A\u8DEF\u590D\u7528\u5417" tabindex="-1"><a class="header-anchor" href="#_5-\u80FD\u8BF4\u4E00\u4E0Bi-o\u591A\u8DEF\u590D\u7528\u5417" aria-hidden="true">#</a> 5.\u80FD\u8BF4\u4E00\u4E0BI/O\u591A\u8DEF\u590D\u7528\u5417\uFF1F</h3><p>\u5F15\u7528\u77E5\u4E4E\u4E0A\u4E00\u4E2A\u9AD8\u8D5E\u7684\u56DE\u7B54\u6765\u89E3\u91CA\u4EC0\u4E48\u662FI/O\u591A\u8DEF\u590D\u7528\u3002\u5047\u8BBE\u4F60\u662F\u4E00\u4E2A\u8001\u5E08\uFF0C\u8BA930\u4E2A\u5B66\u751F\u89E3\u7B54\u4E00\u9053\u9898\u76EE\uFF0C\u7136\u540E\u68C0\u67E5\u5B66\u751F\u505A\u7684\u662F\u5426\u6B63\u786E\uFF0C\u4F60\u6709\u4E0B\u9762\u51E0\u4E2A\u9009\u62E9\uFF1A</p><ul><li><p>\u7B2C\u4E00\u79CD\u9009\u62E9\uFF1A\u6309\u987A\u5E8F\u9010\u4E2A\u68C0\u67E5\uFF0C\u5148\u68C0\u67E5A\uFF0C\u7136\u540E\u662FB\uFF0C\u4E4B\u540E\u662FC\u3001D\u3002\u3002\u3002\u8FD9\u4E2D\u95F4\u5982\u679C\u6709\u4E00\u4E2A\u5B66\u751F\u5361\u4F4F\uFF0C\u5168\u73ED\u90FD\u4F1A\u88AB\u803D\u8BEF\u3002\u8FD9\u79CD\u6A21\u5F0F\u5C31\u597D\u6BD4\uFF0C\u4F60\u7528\u5FAA\u73AF\u6328\u4E2A\u5904\u7406socket\uFF0C\u6839\u672C\u4E0D\u5177\u6709\u5E76\u53D1\u80FD\u529B\u3002</p></li><li><p>\u7B2C\u4E8C\u79CD\u9009\u62E9\uFF1A\u4F60\u521B\u5EFA30\u4E2A\u5206\u8EAB\uFF0C\u6BCF\u4E2A\u5206\u8EAB\u68C0\u67E5\u4E00\u4E2A\u5B66\u751F\u7684\u7B54\u6848\u662F\u5426\u6B63\u786E\u3002 \u8FD9\u79CD\u7C7B\u4F3C\u4E8E\u4E3A\u6BCF\u4E00\u4E2A\u7528\u6237\u521B\u5EFA\u4E00\u4E2A\u8FDB\u7A0B\u6216\u8005- \u7EBF\u7A0B\u5904\u7406\u8FDE\u63A5\u3002</p></li><li><p>\u7B2C\u4E09\u79CD\u9009\u62E9\uFF0C\u4F60\u7AD9\u5728\u8BB2\u53F0\u4E0A\u7B49\uFF0C\u8C01\u89E3\u7B54\u5B8C\u8C01\u4E3E\u624B\u3002\u8FD9\u65F6C\u3001D\u4E3E\u624B\uFF0C\u8868\u793A\u4ED6\u4EEC\u89E3\u7B54\u95EE\u9898\u5B8C\u6BD5\uFF0C\u4F60\u4E0B\u53BB\u4F9D\u6B21\u68C0\u67E5C\u3001D\u7684\u7B54\u6848\uFF0C\u7136\u540E\u7EE7\u7EED\u56DE\u5230\u8BB2\u53F0\u4E0A\u7B49\u3002\u6B64\u65F6E\u3001A\u53C8\u4E3E\u624B\uFF0C\u7136\u540E\u53BB\u5904\u7406E\u548CA\u3002</p></li></ul><p>\u7B2C\u4E00\u79CD\u5C31\u662F\u963B\u585EIO\u6A21\u578B\uFF0C\u7B2C\u4E09\u79CD\u5C31\u662FI/O\u590D\u7528\u6A21\u578B\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-eb541432-d68a-4dd9-b427-96c4dd607d64.png" alt="\u591A\u8DEF\u590D\u7528\u6A21\u578B"></p><p>Linux\u7CFB\u7EDF\u6709\u4E09\u79CD\u65B9\u5F0F\u5B9E\u73B0IO\u591A\u8DEF\u590D\u7528\uFF1Aselect\u3001poll\u548Cepoll\u3002</p><p>\u4F8B\u5982epoll\u65B9\u5F0F\u662F\u5C06\u7528\u6237socket\u5BF9\u5E94\u7684fd\u6CE8\u518C\u8FDBepoll\uFF0C\u7136\u540Eepoll\u5E2E\u4F60\u76D1\u542C\u54EA\u4E9Bsocket\u4E0A\u6709\u6D88\u606F\u5230\u8FBE\uFF0C\u8FD9\u6837\u5C31\u907F\u514D\u4E86\u5927\u91CF\u7684\u65E0\u7528\u64CD\u4F5C\u3002\u6B64\u65F6\u7684socket\u5E94\u8BE5\u91C7\u7528\u975E\u963B\u585E\u6A21\u5F0F\u3002</p><p>\u8FD9\u6837\uFF0C\u6574\u4E2A\u8FC7\u7A0B\u53EA\u5728\u8FDB\u884Cselect\u3001poll\u3001epoll\u8FD9\u4E9B\u8C03\u7528\u7684\u65F6\u5019\u624D\u4F1A\u963B\u585E\uFF0C\u6536\u53D1\u5BA2\u6237\u6D88\u606F\u662F\u4E0D\u4F1A\u963B\u585E\u7684\uFF0C\u6574\u4E2A\u8FDB\u7A0B\u6216\u8005\u7EBF\u7A0B\u5C31\u88AB\u5145\u5206\u5229\u7528\u8D77\u6765\uFF0C\u8FD9\u5C31\u662F\u4E8B\u4EF6\u9A71\u52A8\uFF0C\u6240\u8C13\u7684reactor\u6A21\u5F0F\u3002</p><h3 id="_6-redis\u4E3A\u4EC0\u4E48\u65E9\u671F\u9009\u62E9\u5355\u7EBF\u7A0B" tabindex="-1"><a class="header-anchor" href="#_6-redis\u4E3A\u4EC0\u4E48\u65E9\u671F\u9009\u62E9\u5355\u7EBF\u7A0B" aria-hidden="true">#</a> 6. Redis\u4E3A\u4EC0\u4E48\u65E9\u671F\u9009\u62E9\u5355\u7EBF\u7A0B\uFF1F</h3><p>\u5B98\u65B9\u89E3\u91CA\uFF1Ahttps://redis.io/topics/faq</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-344b8461-98d4-495b-a697-70275b0abad6.png" alt="\u5B98\u65B9\u5355\u7EBF\u7A0B\u89E3\u91CA"> \u5B98\u65B9FAQ\u8868\u793A\uFF0C\u56E0\u4E3ARedis\u662F\u57FA\u4E8E\u5185\u5B58\u7684\u64CD\u4F5C\uFF0CCPU\u6210\u4E3ARedis\u7684\u74F6\u9888\u7684\u60C5\u51B5\u5F88\u5C11\u89C1\uFF0CRedis\u7684\u74F6\u9888\u6700\u6709\u53EF\u80FD\u662F\u5185\u5B58\u7684\u5927\u5C0F\u6216\u8005\u7F51\u7EDC\u9650\u5236\u3002</p><p>\u5982\u679C\u60F3\u8981\u6700\u5927\u7A0B\u5EA6\u5229\u7528CPU\uFF0C\u53EF\u4EE5\u5728\u4E00\u53F0\u673A\u5668\u4E0A\u542F\u52A8\u591A\u4E2ARedis\u5B9E\u4F8B\u3002</p><p>PS\uFF1A\u7F51\u4E0A\u6709\u8FD9\u6837\u7684\u56DE\u7B54\uFF0C\u5410\u69FD\u5B98\u65B9\u7684\u89E3\u91CA\u6709\u4E9B\u6577\u884D\uFF0C\u5176\u5B9E\u5C31\u662F\u5386\u53F2\u539F\u56E0\uFF0C\u5F00\u53D1\u8005\u5ACC\u591A\u7EBF\u7A0B\u9EBB\u70E6\uFF0C\u540E\u6765\u8FD9\u4E2ACPU\u7684\u5229\u7528\u95EE\u9898\u5C31\u88AB\u629B\u7ED9\u4E86\u4F7F\u7528\u8005\u3002</p><p>\u540C\u65F6FAQ\u91CC\u8FD8\u63D0\u5230\u4E86\uFF0C Redis 4.0 \u4E4B\u540E\u5F00\u59CB\u53D8\u6210\u591A\u7EBF\u7A0B\uFF0C\u9664\u4E86\u4E3B\u7EBF\u7A0B\u5916\uFF0C\u5B83\u4E5F\u6709\u540E\u53F0\u7EBF\u7A0B\u5728\u5904\u7406\u4E00\u4E9B\u8F83\u4E3A\u7F13\u6162\u7684\u64CD\u4F5C\uFF0C\u4F8B\u5982\u6E05\u7406\u810F\u6570\u636E\u3001\u65E0\u7528\u8FDE\u63A5\u7684\u91CA\u653E\u3001\u5927 Key \u7684\u5220\u9664\u7B49\u7B49\u3002</p><h3 id="_7-redis6-0\u4F7F\u7528\u591A\u7EBF\u7A0B\u662F\u600E\u4E48\u56DE\u4E8B" tabindex="-1"><a class="header-anchor" href="#_7-redis6-0\u4F7F\u7528\u591A\u7EBF\u7A0B\u662F\u600E\u4E48\u56DE\u4E8B" aria-hidden="true">#</a> 7.Redis6.0\u4F7F\u7528\u591A\u7EBF\u7A0B\u662F\u600E\u4E48\u56DE\u4E8B?</h3><p>Redis\u4E0D\u662F\u8BF4\u7528\u5355\u7EBF\u7A0B\u7684\u5417\uFF1F\u600E\u4E486.0\u6210\u4E86\u591A\u7EBF\u7A0B\u7684\uFF1F</p><p>Redis6.0\u7684\u591A\u7EBF\u7A0B\u662F\u7528\u591A\u7EBF\u7A0B\u6765\u5904\u7406\u6570\u636E\u7684<strong>\u8BFB\u5199\u548C\u534F\u8BAE\u89E3\u6790</strong>\uFF0C\u4F46\u662FRedis<strong>\u6267\u884C\u547D\u4EE4</strong>\u8FD8\u662F\u5355\u7EBF\u7A0B\u7684\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-b7b24e25-d2dc-4457-994f-95bdb3674b8e.png" alt="Redis6.0\u591A\u7EBF\u7A0B"> \u8FD9\u6837\u505A\u7684\u2F6C\u7684\u662F\u56E0\u4E3ARedis\u7684\u6027\u80FD\u74F6\u9888\u5728\u4E8E\u2F79\u7EDCIO\u2F7D\u2FAECPU\uFF0C\u4F7F\u2F64\u591A\u7EBF\u7A0B\u80FD\u63D0\u5347IO\u8BFB\u5199\u7684\u6548\u7387\uFF0C\u4ECE\u2F7D\u6574\u4F53\u63D0\u2FBCRedis\u7684\u6027\u80FD\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><h2 id="\u6301\u4E45\u5316" tabindex="-1"><a class="header-anchor" href="#\u6301\u4E45\u5316" aria-hidden="true">#</a> \u6301\u4E45\u5316</h2><h3 id="_8-redis\u6301\u4E45\u5316\u65B9\u5F0F\u6709\u54EA\u4E9B-\u6709\u4EC0\u4E48\u533A\u522B" tabindex="-1"><a class="header-anchor" href="#_8-redis\u6301\u4E45\u5316\u65B9\u5F0F\u6709\u54EA\u4E9B-\u6709\u4EC0\u4E48\u533A\u522B" aria-hidden="true">#</a> 8.Redis\u6301\u4E45\u5316\u2F45\u5F0F\u6709\u54EA\u4E9B\uFF1F\u6709\u4EC0\u4E48\u533A\u522B\uFF1F</h3><p>Redis\u6301\u4E45\u5316\u2F45\u6848\u5206\u4E3ARDB\u548CAOF\u4E24\u79CD\u3002 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-3bda4a46-adc3-4f0d-a135-b8ae5d4c0d5d.png" alt="Redis\u6301\u4E45\u5316\u4E24\u79CD\u65B9\u5F0F"></p><p><strong>RDB</strong></p><p>RDB\u6301\u4E45\u5316\u662F\u628A\u5F53\u524D\u8FDB\u7A0B\u6570\u636E\u751F\u6210<strong>\u5FEB\u7167</strong>\u4FDD\u5B58\u5230\u786C\u76D8\u7684\u8FC7\u7A0B\uFF0C\u89E6\u53D1RDB\u6301\u4E45\u5316\u8FC7\u7A0B\u5206\u4E3A\u624B\u52A8\u89E6\u53D1\u548C\u81EA\u52A8\u89E6\u53D1\u3002</p><p>RDB\u2F42\u4EF6\u662F\u2F00\u4E2A\u538B\u7F29\u7684\u2F06\u8FDB\u5236\u2F42\u4EF6\uFF0C\u901A\u8FC7\u5B83\u53EF\u4EE5\u8FD8\u539F\u67D0\u4E2A\u65F6\u523B\u6570\u636E\u5E93\u7684\u72B6\u6001\u3002\u7531\u4E8ERDB\u2F42\u4EF6\u662F\u4FDD\u5B58\u5728\u786C\u76D8\u4E0A\u7684\uFF0C\u6240\u4EE5\u5373\u4F7FRedis\u5D29\u6E83\u6216\u8005\u9000\u51FA\uFF0C\u53EA\u8981RDB\u2F42\u4EF6\u5B58\u5728\uFF0C\u5C31\u53EF\u4EE5\u2F64\u5B83\u6765\u6062\u590D\u8FD8\u539F\u6570\u636E\u5E93\u7684\u72B6\u6001\u3002</p><p>\u624B\u52A8\u89E6\u53D1\u5206\u522B\u5BF9\u5E94save\u548Cbgsave\u547D\u4EE4: <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-ffe56e32-34c5-453d-8859-c2febbe6a038.png" alt="save\u548Cbgsave"></p><ul><li><p>save\u547D\u4EE4\uFF1A\u963B\u585E\u5F53\u524DRedis\u670D\u52A1\u5668\uFF0C\u76F4\u5230RDB\u8FC7\u7A0B\u5B8C\u6210\u4E3A\u6B62\uFF0C\u5BF9\u4E8E\u5185\u5B58\u6BD4\u8F83\u5927\u7684\u5B9E\u4F8B\u4F1A\u9020\u6210\u957F\u65F6\u95F4\u963B\u585E\uFF0C\u7EBF\u4E0A\u73AF\u5883\u4E0D\u5EFA\u8BAE\u4F7F\u7528\u3002</p></li><li><p>bgsave\u547D\u4EE4\uFF1ARedis\u8FDB\u7A0B\u6267\u884Cfork\u64CD\u4F5C\u521B\u5EFA\u5B50\u8FDB\u7A0B\uFF0CRDB\u6301\u4E45\u5316\u8FC7\u7A0B\u7531\u5B50\u8FDB\u7A0B\u8D1F\u8D23\uFF0C\u5B8C\u6210\u540E\u81EA\u52A8\u7ED3\u675F\u3002\u963B\u585E\u53EA\u53D1\u751F\u5728fork\u9636\u6BB5\uFF0C\u4E00\u822C\u65F6\u95F4\u5F88\u77ED\u3002</p></li></ul><p>\u4EE5\u4E0B\u573A\u666F\u4F1A\u81EA\u52A8\u89E6\u53D1RDB\u6301\u4E45\u5316\uFF1A</p><ul><li>\u4F7F\u7528save\u76F8\u5173\u914D\u7F6E\uFF0C\u5982\u201Csave m n\u201D\u3002\u8868\u793Am\u79D2\u5185\u6570\u636E\u96C6\u5B58\u5728n\u6B21\u4FEE\u6539\u65F6\uFF0C\u81EA\u52A8\u89E6\u53D1bgsave\u3002</li><li>\u5982\u679C\u4ECE\u8282\u70B9\u6267\u884C\u5168\u91CF\u590D\u5236\u64CD\u4F5C\uFF0C\u4E3B\u8282\u70B9\u81EA\u52A8\u6267\u884Cbgsave\u751F\u6210RDB\u6587\u4EF6\u5E76\u53D1\u9001\u7ED9\u4ECE\u8282\u70B9</li><li>\u6267\u884Cdebug reload\u547D\u4EE4\u91CD\u65B0\u52A0\u8F7DRedis\u65F6\uFF0C\u4E5F\u4F1A\u81EA\u52A8\u89E6\u53D1save\u64CD\u4F5C</li><li>\u9ED8\u8BA4\u60C5\u51B5\u4E0B\u6267\u884Cshutdown\u547D\u4EE4\u65F6\uFF0C\u5982\u679C\u6CA1\u6709\u5F00\u542FAOF\u6301\u4E45\u5316\u529F\u80FD\u5219\u81EA\u52A8\u6267\u884Cbgsave\u3002</li></ul><p><strong>AOF</strong></p><p>AOF\uFF08append only file\uFF09\u6301\u4E45\u5316\uFF1A\u4EE5\u72EC\u7ACB\u65E5\u5FD7\u7684\u65B9\u5F0F\u8BB0\u5F55\u6BCF\u6B21\u5199\u547D\u4EE4\uFF0C \u91CD\u542F\u65F6\u518D\u91CD\u65B0\u6267\u884CAOF\u6587\u4EF6\u4E2D\u7684\u547D\u4EE4\u8FBE\u5230\u6062\u590D\u6570\u636E\u7684\u76EE\u7684\u3002AOF\u7684\u4E3B\u8981\u4F5C\u7528\u662F\u89E3\u51B3\u4E86\u6570\u636E\u6301\u4E45\u5316\u7684\u5B9E\u65F6\u6027\uFF0C\u76EE\u524D\u5DF2\u7ECF\u662FRedis\u6301\u4E45\u5316\u7684\u4E3B\u6D41\u65B9\u5F0F\u3002</p><p>AOF\u7684\u5DE5\u4F5C\u6D41\u7A0B\u64CD\u4F5C\uFF1A\u547D\u4EE4\u5199\u5165 \uFF08append\uFF09\u3001\u6587\u4EF6\u540C\u6B65\uFF08sync\uFF09\u3001\u6587\u4EF6\u91CD\u5199\uFF08rewrite\uFF09\u3001\u91CD\u542F\u52A0\u8F7D \uFF08load\uFF09 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-a9fb6202-b1a1-484d-a4fa-fef519090b44.png" alt="AOF\u5DE5\u4F5C\u6D41\u7A0B">\u6D41\u7A0B\u5982\u4E0B\uFF1A</p><p>1\uFF09\u6240\u6709\u7684\u5199\u5165\u547D\u4EE4\u4F1A\u8FFD\u52A0\u5230aof_buf\uFF08\u7F13\u51B2\u533A\uFF09\u4E2D\u3002</p><p>2\uFF09AOF\u7F13\u51B2\u533A\u6839\u636E\u5BF9\u5E94\u7684\u7B56\u7565\u5411\u786C\u76D8\u505A\u540C\u6B65\u64CD\u4F5C\u3002</p><p>3\uFF09\u968F\u7740AOF\u6587\u4EF6\u8D8A\u6765\u8D8A\u5927\uFF0C\u9700\u8981\u5B9A\u671F\u5BF9AOF\u6587\u4EF6\u8FDB\u884C\u91CD\u5199\uFF0C\u8FBE\u5230\u538B\u7F29 \u7684\u76EE\u7684\u3002</p><p>4\uFF09\u5F53Redis\u670D\u52A1\u5668\u91CD\u542F\u65F6\uFF0C\u53EF\u4EE5\u52A0\u8F7DAOF\u6587\u4EF6\u8FDB\u884C\u6570\u636E\u6062\u590D\u3002</p><h3 id="_9-rdb-\u548C-aof-\u5404\u81EA\u6709\u4EC0\u4E48\u4F18\u7F3A\u70B9" tabindex="-1"><a class="header-anchor" href="#_9-rdb-\u548C-aof-\u5404\u81EA\u6709\u4EC0\u4E48\u4F18\u7F3A\u70B9" aria-hidden="true">#</a> 9.RDB \u548C AOF \u5404\u81EA\u6709\u4EC0\u4E48\u4F18\u7F3A\u70B9\uFF1F</h3><p><strong>RDB | \u4F18\u70B9</strong></p><ol><li>\u53EA\u6709\u4E00\u4E2A\u7D27\u51D1\u7684\u4E8C\u8FDB\u5236\u6587\u4EF6 <code>dump.rdb</code>\uFF0C\u975E\u5E38\u9002\u5408\u5907\u4EFD\u3001\u5168\u91CF\u590D\u5236\u7684\u573A\u666F\u3002</li><li><strong>\u5BB9\u707E\u6027\u597D</strong>\uFF0C\u53EF\u4EE5\u628ARDB\u6587\u4EF6\u62F7\u8D1D\u9053\u8FDC\u7A0B\u673A\u5668\u6216\u8005\u6587\u4EF6\u7CFB\u7EDF\u5F20\uFF0C\u7528\u4E8E\u5BB9\u707E\u6062\u590D\u3002</li><li><strong>\u6062\u590D\u901F\u5EA6\u5FEB</strong>\uFF0CRDB\u6062\u590D\u6570\u636E\u7684\u901F\u5EA6\u8FDC\u8FDC\u5FEB\u4E8EAOF\u7684\u65B9\u5F0F</li></ol><p><strong>RDB | \u7F3A\u70B9</strong></p><ol><li><strong>\u5B9E\u65F6\u6027\u4F4E</strong>\uFF0CRDB \u662F\u95F4\u9694\u4E00\u6BB5\u65F6\u95F4\u8FDB\u884C\u6301\u4E45\u5316\uFF0C\u6CA1\u6CD5\u505A\u5230\u5B9E\u65F6\u6301\u4E45\u5316/\u79D2\u7EA7\u6301\u4E45\u5316\u3002\u5982\u679C\u5728\u8FD9\u4E00\u95F4\u9694\u4E8B\u4EF6\u53D1\u751F\u6545\u969C\uFF0C\u6570\u636E\u4F1A\u4E22\u5931\u3002</li><li><strong>\u5B58\u5728\u517C\u5BB9\u95EE\u9898</strong>\uFF0CRedis\u6F14\u8FDB\u8FC7\u7A0B\u5B58\u5728\u591A\u4E2A\u683C\u5F0F\u7684RDB\u7248\u672C\uFF0C\u5B58\u5728\u8001\u7248\u672CRedis\u65E0\u6CD5\u517C\u5BB9\u65B0\u7248\u672CRDB\u7684\u95EE\u9898\u3002</li></ol><p><strong>AOF | \u4F18\u70B9</strong></p><ol><li><strong>\u5B9E\u65F6\u6027\u597D</strong>\uFF0Caof \u6301\u4E45\u5316\u53EF\u4EE5\u914D\u7F6E <code>appendfsync</code> \u5C5E\u6027\uFF0C\u6709 <code>always</code>\uFF0C\u6BCF\u8FDB\u884C\u4E00\u6B21\u547D\u4EE4\u64CD\u4F5C\u5C31\u8BB0\u5F55\u5230 aof \u6587\u4EF6\u4E2D\u4E00\u6B21\u3002</li><li>\u901A\u8FC7 append \u6A21\u5F0F\u5199\u6587\u4EF6\uFF0C\u5373\u4F7F\u4E2D\u9014\u670D\u52A1\u5668\u5B95\u673A\uFF0C\u53EF\u4EE5\u901A\u8FC7 redis-check-aof \u5DE5\u5177\u89E3\u51B3\u6570\u636E\u4E00\u81F4\u6027\u95EE\u9898\u3002</li></ol><p><strong>AOF | \u7F3A\u70B9</strong></p><ol><li>AOF \u6587\u4EF6\u6BD4 RDB <strong>\u6587\u4EF6\u5927</strong>\uFF0C\u4E14 <strong>\u6062\u590D\u901F\u5EA6\u6162</strong>\u3002</li><li><strong>\u6570\u636E\u96C6\u5927</strong> \u7684\u65F6\u5019\uFF0C\u6BD4 RDB <strong>\u542F\u52A8\u6548\u7387\u4F4E</strong>\u3002</li></ol><h3 id="_10-rdb\u548Caof\u5982\u4F55\u9009\u62E9" tabindex="-1"><a class="header-anchor" href="#_10-rdb\u548Caof\u5982\u4F55\u9009\u62E9" aria-hidden="true">#</a> 10.RDB\u548CAOF\u5982\u4F55\u9009\u62E9\uFF1F</h3><ul><li>\u4E00\u822C\u6765\u8BF4\uFF0C \u5982\u679C\u60F3\u8FBE\u5230\u8DB3\u4EE5\u5AB2\u7F8E\u6570\u636E\u5E93\u7684 <strong>\u6570\u636E\u5B89\u5168\u6027</strong>\uFF0C\u5E94\u8BE5 <strong>\u540C\u65F6\u4F7F\u7528\u4E24\u79CD\u6301\u4E45\u5316\u529F\u80FD</strong>\u3002\u5728\u8FD9\u79CD\u60C5\u51B5\u4E0B\uFF0C\u5F53 Redis \u91CD\u542F\u7684\u65F6\u5019\u4F1A\u4F18\u5148\u8F7D\u5165 AOF \u6587\u4EF6\u6765\u6062\u590D\u539F\u59CB\u7684\u6570\u636E\uFF0C\u56E0\u4E3A\u5728\u901A\u5E38\u60C5\u51B5\u4E0B AOF \u6587\u4EF6\u4FDD\u5B58\u7684\u6570\u636E\u96C6\u8981\u6BD4 RDB \u6587\u4EF6\u4FDD\u5B58\u7684\u6570\u636E\u96C6\u8981\u5B8C\u6574\u3002</li><li>\u5982\u679C <strong>\u53EF\u4EE5\u63A5\u53D7\u6570\u5206\u949F\u4EE5\u5185\u7684\u6570\u636E\u4E22\u5931</strong>\uFF0C\u90A3\u4E48\u53EF\u4EE5 <strong>\u53EA\u4F7F\u7528 RDB \u6301\u4E45\u5316</strong>\u3002</li><li>\u6709\u5F88\u591A\u7528\u6237\u90FD\u53EA\u4F7F\u7528 AOF \u6301\u4E45\u5316\uFF0C\u4F46\u5E76\u4E0D\u63A8\u8350\u8FD9\u79CD\u65B9\u5F0F\uFF0C\u56E0\u4E3A\u5B9A\u65F6\u751F\u6210 RDB \u5FEB\u7167\uFF08snapshot\uFF09\u975E\u5E38\u4FBF\u4E8E\u8FDB\u884C\u6570\u636E\u5907\u4EFD\uFF0C \u5E76\u4E14 RDB \u6062\u590D\u6570\u636E\u96C6\u7684\u901F\u5EA6\u4E5F\u8981\u6BD4 AOF \u6062\u590D\u7684\u901F\u5EA6\u8981\u5FEB\uFF0C\u9664\u6B64\u4E4B\u5916\uFF0C\u4F7F\u7528 RDB \u8FD8\u53EF\u4EE5\u907F\u514D AOF \u7A0B\u5E8F\u7684 bug\u3002</li><li>\u5982\u679C\u53EA\u9700\u8981\u6570\u636E\u5728\u670D\u52A1\u5668\u8FD0\u884C\u7684\u65F6\u5019\u5B58\u5728\uFF0C\u4E5F\u53EF\u4EE5\u4E0D\u4F7F\u7528\u4EFB\u4F55\u6301\u4E45\u5316\u65B9\u5F0F\u3002</li></ul><h3 id="_11-redis\u7684\u6570\u636E\u6062\u590D" tabindex="-1"><a class="header-anchor" href="#_11-redis\u7684\u6570\u636E\u6062\u590D" aria-hidden="true">#</a> 11.Redis\u7684\u6570\u636E\u6062\u590D\uFF1F</h3><p>\u5F53Redis\u53D1\u751F\u4E86\u6545\u969C\uFF0C\u53EF\u4EE5\u4ECERDB\u6216\u8005AOF\u4E2D\u6062\u590D\u6570\u636E\u3002</p><p>\u6062\u590D\u7684\u8FC7\u7A0B\u4E5F\u5F88\u7B80\u5355\uFF0C\u628ARDB\u6216\u8005AOF\u6587\u4EF6\u62F7\u8D1D\u5230Redis\u7684\u6570\u636E\u76EE\u5F55\u4E0B\uFF0C\u5982\u679C\u4F7F\u7528AOF\u6062\u590D\uFF0C\u914D\u7F6E\u6587\u4EF6\u5F00\u542FAOF\uFF0C\u7136\u540E\u542F\u52A8redis-server\u5373\u53EF\u3002 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-f9aab5e9-a875-4316-9ec9-0c5650afe5c1.png" alt="Redis\u542F\u52A8\u52A0\u8F7D\u6570\u636E"></p><p><strong>Redis</strong> \u542F\u52A8\u65F6\u52A0\u8F7D\u6570\u636E\u7684\u6D41\u7A0B\uFF1A</p><ol><li>AOF\u6301\u4E45\u5316\u5F00\u542F\u4E14\u5B58\u5728AOF\u6587\u4EF6\u65F6\uFF0C\u4F18\u5148\u52A0\u8F7DAOF\u6587\u4EF6\u3002</li><li>AOF\u5173\u95ED\u6216\u8005AOF\u6587\u4EF6\u4E0D\u5B58\u5728\u65F6\uFF0C\u52A0\u8F7DRDB\u6587\u4EF6\u3002</li><li>\u52A0\u8F7DAOF/RDB\u6587\u4EF6\u6210\u529F\u540E\uFF0CRedis\u542F\u52A8\u6210\u529F\u3002</li><li>AOF/RDB\u6587\u4EF6\u5B58\u5728\u9519\u8BEF\u65F6\uFF0CRedis\u542F\u52A8\u5931\u8D25\u5E76\u6253\u5370\u9519\u8BEF\u4FE1\u606F\u3002</li></ol><h3 id="_12-redis-4-0-\u7684\u6DF7\u5408\u6301\u4E45\u5316\u4E86\u89E3\u5417" tabindex="-1"><a class="header-anchor" href="#_12-redis-4-0-\u7684\u6DF7\u5408\u6301\u4E45\u5316\u4E86\u89E3\u5417" aria-hidden="true">#</a> 12.Redis 4.0 \u7684\u6DF7\u5408\u6301\u4E45\u5316\u4E86\u89E3\u5417\uFF1F</h3><p>\u91CD\u542F Redis \u65F6\uFF0C\u6211\u4EEC\u5F88\u5C11\u4F7F\u7528 <code>RDB</code> \u6765\u6062\u590D\u5185\u5B58\u72B6\u6001\uFF0C\u56E0\u4E3A\u4F1A\u4E22\u5931\u5927\u91CF\u6570\u636E\u3002\u6211\u4EEC\u901A\u5E38\u4F7F\u7528 AOF \u65E5\u5FD7\u91CD\u653E\uFF0C\u4F46\u662F\u91CD\u653E AOF \u65E5\u5FD7\u6027\u80FD\u76F8\u5BF9 <code>RDB</code> \u6765\u8BF4\u8981\u6162\u5F88\u591A\uFF0C\u8FD9\u6837\u5728 Redis \u5B9E\u4F8B\u5F88\u5927\u7684\u60C5\u51B5\u4E0B\uFF0C\u542F\u52A8\u9700\u8981\u82B1\u8D39\u5F88\u957F\u7684\u65F6\u95F4\u3002</p><p><strong>Redis 4.0</strong> \u4E3A\u4E86\u89E3\u51B3\u8FD9\u4E2A\u95EE\u9898\uFF0C\u5E26\u6765\u4E86\u4E00\u4E2A\u65B0\u7684\u6301\u4E45\u5316\u9009\u9879\u2014\u2014<strong>\u6DF7\u5408\u6301\u4E45\u5316</strong>\u3002\u5C06 <code>rdb</code> \u6587\u4EF6\u7684\u5185\u5BB9\u548C\u589E\u91CF\u7684 AOF \u65E5\u5FD7\u6587\u4EF6\u5B58\u5728\u4E00\u8D77\u3002\u8FD9\u91CC\u7684 AOF \u65E5\u5FD7\u4E0D\u518D\u662F\u5168\u91CF\u7684\u65E5\u5FD7\uFF0C\u800C\u662F <strong>\u81EA\u6301\u4E45\u5316\u5F00\u59CB\u5230\u6301\u4E45\u5316\u7ED3\u675F</strong> \u7684\u8FD9\u6BB5\u65F6\u95F4\u53D1\u751F\u7684\u589E\u91CF AOF \u65E5\u5FD7\uFF0C\u901A\u5E38\u8FD9\u90E8\u5206 AOF \u65E5\u5FD7\u5F88\u5C0F\uFF1A <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-19c531e5-da95-495a-a4c4-d63a0b8bba95.png" alt="\u6DF7\u5408\u6301\u4E45\u5316"></p><p>\u4E8E\u662F\u5728 Redis \u91CD\u542F\u7684\u65F6\u5019\uFF0C\u53EF\u4EE5\u5148\u52A0\u8F7D <code>rdb</code> \u7684\u5185\u5BB9\uFF0C\u7136\u540E\u518D\u91CD\u653E\u589E\u91CF AOF \u65E5\u5FD7\u5C31\u53EF\u4EE5\u5B8C\u5168\u66FF\u4EE3\u4E4B\u524D\u7684 AOF \u5168\u91CF\u6587\u4EF6\u91CD\u653E\uFF0C\u91CD\u542F\u6548\u7387\u56E0\u6B64\u5927\u5E45\u5F97\u5230\u63D0\u5347\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><h2 id="\u9AD8\u53EF\u7528" tabindex="-1"><a class="header-anchor" href="#\u9AD8\u53EF\u7528" aria-hidden="true">#</a> \u9AD8\u53EF\u7528</h2><p>Redis\u4FDD\u8BC1\u9AD8\u53EF\u7528\u4E3B\u8981\u6709\u4E09\u79CD\u65B9\u5F0F\uFF1A\u4E3B\u4ECE\u3001\u54E8\u5175\u3001\u96C6\u7FA4\u3002</p><h3 id="_13-\u4E3B\u4ECE\u590D\u5236\u4E86\u89E3\u5417" tabindex="-1"><a class="header-anchor" href="#_13-\u4E3B\u4ECE\u590D\u5236\u4E86\u89E3\u5417" aria-hidden="true">#</a> 13.\u4E3B\u4ECE\u590D\u5236\u4E86\u89E3\u5417\uFF1F</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-60497f1e-8afb-44b3-bb7a-d4c29e5ac484.png" alt="Redis\u4E3B\u4ECE\u590D\u5236\u7B80\u56FE"></p><p><strong>\u4E3B\u4ECE\u590D\u5236</strong>\uFF0C\u662F\u6307\u5C06\u4E00\u53F0 Redis \u670D\u52A1\u5668\u7684\u6570\u636E\uFF0C\u590D\u5236\u5230\u5176\u4ED6\u7684 Redis \u670D\u52A1\u5668\u3002\u524D\u8005\u79F0\u4E3A <strong>\u4E3B\u8282\u70B9(master)</strong>\uFF0C\u540E\u8005\u79F0\u4E3A <strong>\u4ECE\u8282\u70B9(slave)</strong>\u3002\u4E14\u6570\u636E\u7684\u590D\u5236\u662F <strong>\u5355\u5411</strong> \u7684\uFF0C\u53EA\u80FD\u7531\u4E3B\u8282\u70B9\u5230\u4ECE\u8282\u70B9\u3002Redis \u4E3B\u4ECE\u590D\u5236\u652F\u6301 <strong>\u4E3B\u4ECE\u540C\u6B65</strong> \u548C <strong>\u4ECE\u4ECE\u540C\u6B65</strong> \u4E24\u79CD\uFF0C\u540E\u8005\u662F Redis \u540E\u7EED\u7248\u672C\u65B0\u589E\u7684\u529F\u80FD\uFF0C\u4EE5\u51CF\u8F7B\u4E3B\u8282\u70B9\u7684\u540C\u6B65\u8D1F\u62C5\u3002</p><blockquote><p>\u4E3B\u4ECE\u590D\u5236\u4E3B\u8981\u7684\u4F5C\u7528?</p></blockquote><ul><li><strong>\u6570\u636E\u5197\u4F59\uFF1A</strong> \u4E3B\u4ECE\u590D\u5236\u5B9E\u73B0\u4E86\u6570\u636E\u7684\u70ED\u5907\u4EFD\uFF0C\u662F\u6301\u4E45\u5316\u4E4B\u5916\u7684\u4E00\u79CD\u6570\u636E\u5197\u4F59\u65B9\u5F0F\u3002</li><li><strong>\u6545\u969C\u6062\u590D\uFF1A</strong> \u5F53\u4E3B\u8282\u70B9\u51FA\u73B0\u95EE\u9898\u65F6\uFF0C\u53EF\u4EE5\u7531\u4ECE\u8282\u70B9\u63D0\u4F9B\u670D\u52A1\uFF0C\u5B9E\u73B0\u5FEB\u901F\u7684\u6545\u969C\u6062\u590D <em>(\u5B9E\u9645\u4E0A\u662F\u4E00\u79CD\u670D\u52A1\u7684\u5197\u4F59)</em>\u3002</li><li><strong>\u8D1F\u8F7D\u5747\u8861\uFF1A</strong> \u5728\u4E3B\u4ECE\u590D\u5236\u7684\u57FA\u7840\u4E0A\uFF0C\u914D\u5408\u8BFB\u5199\u5206\u79BB\uFF0C\u53EF\u4EE5\u7531\u4E3B\u8282\u70B9\u63D0\u4F9B\u5199\u670D\u52A1\uFF0C\u7531\u4ECE\u8282\u70B9\u63D0\u4F9B\u8BFB\u670D\u52A1 <em>\uFF08\u5373\u5199 Redis \u6570\u636E\u65F6\u5E94\u7528\u8FDE\u63A5\u4E3B\u8282\u70B9\uFF0C\u8BFB Redis \u6570\u636E\u65F6\u5E94\u7528\u8FDE\u63A5\u4ECE\u8282\u70B9\uFF09</em>\uFF0C\u5206\u62C5\u670D\u52A1\u5668\u8D1F\u8F7D\u3002\u5C24\u5176\u662F\u5728\u5199\u5C11\u8BFB\u591A\u7684\u573A\u666F\u4E0B\uFF0C\u901A\u8FC7\u591A\u4E2A\u4ECE\u8282\u70B9\u5206\u62C5\u8BFB\u8D1F\u8F7D\uFF0C\u53EF\u4EE5\u5927\u5927\u63D0\u9AD8 Redis \u670D\u52A1\u5668\u7684\u5E76\u53D1\u91CF\u3002</li><li><strong>\u9AD8\u53EF\u7528\u57FA\u77F3\uFF1A</strong> \u9664\u4E86\u4E0A\u8FF0\u4F5C\u7528\u4EE5\u5916\uFF0C\u4E3B\u4ECE\u590D\u5236\u8FD8\u662F\u54E8\u5175\u548C\u96C6\u7FA4\u80FD\u591F\u5B9E\u65BD\u7684 <strong>\u57FA\u7840</strong>\uFF0C\u56E0\u6B64\u8BF4\u4E3B\u4ECE\u590D\u5236\u662F Redis \u9AD8\u53EF\u7528\u7684\u57FA\u7840\u3002</li></ul><h3 id="_14-redis\u4E3B\u4ECE\u6709\u51E0\u79CD\u5E38\u89C1\u7684\u62D3\u6251\u7ED3\u6784" tabindex="-1"><a class="header-anchor" href="#_14-redis\u4E3B\u4ECE\u6709\u51E0\u79CD\u5E38\u89C1\u7684\u62D3\u6251\u7ED3\u6784" aria-hidden="true">#</a> 14.Redis\u4E3B\u4ECE\u6709\u51E0\u79CD\u5E38\u89C1\u7684\u62D3\u6251\u7ED3\u6784\uFF1F</h3><p>Redis\u7684\u590D\u5236\u62D3\u6251\u7ED3\u6784\u53EF\u4EE5\u652F\u6301\u5355\u5C42\u6216\u591A\u5C42\u590D\u5236\u5173\u7CFB\uFF0C\u6839\u636E\u62D3\u6251\u590D\u6742\u6027\u53EF\u4EE5\u5206\u4E3A\u4EE5\u4E0B\u4E09\u79CD\uFF1A\u4E00\u4E3B\u4E00\u4ECE\u3001\u4E00\u4E3B\u591A\u4ECE\u3001\u6811\u72B6\u4E3B\u4ECE\u7ED3\u6784\u3002</p><p>1.\u4E00\u4E3B\u4E00\u4ECE\u7ED3\u6784</p><p>\u4E00\u4E3B\u4E00\u4ECE\u7ED3\u6784\u662F\u6700\u7B80\u5355\u7684\u590D\u5236\u62D3\u6251\u7ED3\u6784\uFF0C\u7528\u4E8E\u4E3B\u8282\u70B9\u51FA\u73B0\u5B95\u673A\u65F6\u4ECE\u8282\u70B9\u63D0\u4F9B\u6545\u969C\u8F6C\u79FB\u652F\u6301\u3002 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-5d91a67c-dbff-4a8d-bf9d-1fe7602d5a27.png" alt="\u4E00\u4E3B\u4E00\u4ECE\u7ED3\u6784"> 2.\u4E00\u4E3B\u591A\u4ECE\u7ED3\u6784</p><p>\u4E00\u4E3B\u591A\u4ECE\u7ED3\u6784\uFF08\u53C8\u79F0\u4E3A\u661F\u5F62\u62D3\u6251\u7ED3\u6784\uFF09\u4F7F\u5F97\u5E94\u7528\u7AEF\u53EF\u4EE5\u5229\u7528\u591A\u4E2A\u4ECE\u8282\u70B9\u5B9E\u73B0\u8BFB\u5199\u5206\u79BB\uFF08\u89C1\u56FE6-5\uFF09\u3002\u5BF9\u4E8E\u8BFB\u5360\u6BD4\u8F83\u5927\u7684\u573A\u666F\uFF0C\u53EF\u4EE5\u628A\u8BFB\u547D\u4EE4\u53D1\u9001\u5230\u4ECE\u8282\u70B9\u6765\u5206\u62C5\u4E3B\u8282\u70B9\u538B\u529B\u3002 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-71074254-699a-480b-bbb0-c68f364a380b.png" alt="\u4E00\u4E3B\u591A\u4ECE\u7ED3\u6784"> 3.\u6811\u72B6\u4E3B\u4ECE\u7ED3\u6784</p><p>\u6811\u72B6\u4E3B\u4ECE\u7ED3\u6784\uFF08\u53C8\u79F0\u4E3A\u6811\u72B6\u62D3\u6251\u7ED3\u6784\uFF09\u4F7F\u5F97\u4ECE\u8282\u70B9\u4E0D\u4F46\u53EF\u4EE5\u590D\u5236\u4E3B\u8282\u70B9\u6570\u636E\uFF0C\u540C\u65F6\u53EF\u4EE5\u4F5C\u4E3A\u5176\u4ED6\u4ECE\u8282\u70B9\u7684\u4E3B\u8282\u70B9\u7EE7\u7EED\u5411\u4E0B\u5C42\u590D\u5236\u3002\u901A\u8FC7\u5F15\u5165\u590D\u5236\u4E2D\u95F4\u5C42\uFF0C\u53EF\u4EE5\u6709\u6548\u964D\u4F4E\u4E3B\u8282\u70B9\u8D1F\u8F7D\u548C\u9700\u8981\u4F20\u9001\u7ED9\u4ECE\u8282\u70B9\u7684\u6570\u636E\u91CF\u3002 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-dff14203-5e01-4d1b-a775-10ee444ada54.png" alt="\u6811\u72B6\u4E3B\u4ECE\u7ED3\u6784"></p><h3 id="_15-redis\u7684\u4E3B\u4ECE\u590D\u5236\u539F\u7406\u4E86\u89E3\u5417" tabindex="-1"><a class="header-anchor" href="#_15-redis\u7684\u4E3B\u4ECE\u590D\u5236\u539F\u7406\u4E86\u89E3\u5417" aria-hidden="true">#</a> 15.Redis\u7684\u4E3B\u4ECE\u590D\u5236\u539F\u7406\u4E86\u89E3\u5417\uFF1F</h3><p>Redis\u4E3B\u4ECE\u590D\u5236\u7684\u5DE5\u4F5C\u6D41\u7A0B\u5927\u6982\u53EF\u4EE5\u5206\u4E3A\u5982\u4E0B\u51E0\u6B65\uFF1A <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-21123b1e-68b4-436b-ac84-3365a49a81bd.png" alt="Redis\u4E3B\u4ECE\u590D\u5236\u5DE5\u4F5C\u6D41\u7A0B"></p><ol><li>\u4FDD\u5B58\u4E3B\u8282\u70B9\uFF08master\uFF09\u4FE1\u606F \u8FD9\u4E00\u6B65\u53EA\u662F\u4FDD\u5B58\u4E3B\u8282\u70B9\u4FE1\u606F\uFF0C\u4FDD\u5B58\u4E3B\u8282\u70B9\u7684ip\u548Cport\u3002</li><li>\u4E3B\u4ECE\u5EFA\u7ACB\u8FDE\u63A5 \u4ECE\u8282\u70B9\uFF08slave\uFF09\u53D1\u73B0\u65B0\u7684\u4E3B\u8282\u70B9\u540E\uFF0C\u4F1A\u5C1D\u8BD5\u548C\u4E3B\u8282\u70B9\u5EFA\u7ACB\u7F51\u7EDC\u8FDE\u63A5\u3002</li><li>\u53D1\u9001ping\u547D\u4EE4 \u8FDE\u63A5\u5EFA\u7ACB\u6210\u529F\u540E\u4ECE\u8282\u70B9\u53D1\u9001ping\u8BF7\u6C42\u8FDB\u884C\u9996\u6B21\u901A\u4FE1\uFF0C\u4E3B\u8981\u662F\u68C0\u6D4B\u4E3B\u4ECE\u4E4B\u95F4\u7F51\u7EDC\u5957\u63A5\u5B57\u662F\u5426\u53EF\u7528\u3001\u4E3B\u8282\u70B9\u5F53\u524D\u662F\u5426\u53EF\u63A5\u53D7\u5904\u7406\u547D\u4EE4\u3002</li><li>\u6743\u9650\u9A8C\u8BC1 \u5982\u679C\u4E3B\u8282\u70B9\u8981\u6C42\u5BC6\u7801\u9A8C\u8BC1\uFF0C\u4ECE\u8282\u70B9\u5FC5\u987B\u6B63\u786E\u7684\u5BC6\u7801\u624D\u80FD\u901A\u8FC7\u9A8C\u8BC1\u3002</li><li>\u540C\u6B65\u6570\u636E\u96C6 \u4E3B\u4ECE\u590D\u5236\u8FDE\u63A5\u6B63\u5E38\u901A\u4FE1\u540E\uFF0C\u4E3B\u8282\u70B9\u4F1A\u628A\u6301\u6709\u7684\u6570\u636E\u5168\u90E8\u53D1\u9001\u7ED9\u4ECE\u8282\u70B9\u3002</li><li>\u547D\u4EE4\u6301\u7EED\u590D\u5236 \u63A5\u4E0B\u6765\u4E3B\u8282\u70B9\u4F1A\u6301\u7EED\u5730\u628A\u5199\u547D\u4EE4\u53D1\u9001\u7ED9\u4ECE\u8282\u70B9\uFF0C\u4FDD\u8BC1\u4E3B\u4ECE\u6570\u636E\u4E00\u81F4\u6027\u3002</li></ol><h3 id="_16-\u8BF4\u8BF4\u4E3B\u4ECE\u6570\u636E\u540C\u6B65\u7684\u65B9\u5F0F" tabindex="-1"><a class="header-anchor" href="#_16-\u8BF4\u8BF4\u4E3B\u4ECE\u6570\u636E\u540C\u6B65\u7684\u65B9\u5F0F" aria-hidden="true">#</a> 16.\u8BF4\u8BF4\u4E3B\u4ECE\u6570\u636E\u540C\u6B65\u7684\u65B9\u5F0F\uFF1F</h3><p>Redis\u57282.8\u53CA\u4EE5\u4E0A\u7248\u672C\u4F7F\u7528psync\u547D\u4EE4\u5B8C\u6210\u4E3B\u4ECE\u6570\u636E\u540C\u6B65\uFF0C\u540C\u6B65\u8FC7\u7A0B\u5206\u4E3A\uFF1A\u5168\u91CF\u590D\u5236\u548C\u90E8\u5206\u590D\u5236\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-7518f715-6dee-4e70-b972-8aed9879e451.png" alt="\u4E3B\u4ECE\u6570\u636E\u540C\u6B65\u65B9\u5F0F"></p><p><strong>\u5168\u91CF\u590D\u5236</strong> \u4E00\u822C\u7528\u4E8E\u521D\u6B21\u590D\u5236\u573A\u666F\uFF0CRedis\u65E9\u671F\u652F\u6301\u7684\u590D\u5236\u529F\u80FD\u53EA\u6709\u5168\u91CF\u590D\u5236\uFF0C\u5B83\u4F1A\u628A\u4E3B\u8282\u70B9\u5168\u90E8\u6570\u636E\u4E00\u6B21\u6027\u53D1\u9001\u7ED9\u4ECE\u8282\u70B9\uFF0C\u5F53\u6570\u636E\u91CF\u8F83\u5927\u65F6\uFF0C\u4F1A\u5BF9\u4E3B\u4ECE\u8282\u70B9\u548C\u7F51\u7EDC\u9020\u6210\u5F88\u5927\u7684\u5F00\u9500\u3002</p><p>\u5168\u91CF\u590D\u5236\u7684\u5B8C\u6574\u8FD0\u884C\u6D41\u7A0B\u5982\u4E0B\uFF1A <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-aa8d2960-b341-49cc-b04c-201241fd15de.png" alt="\u5168\u91CF\u590D\u5236"></p><ol><li>\u53D1\u9001psync\u547D\u4EE4\u8FDB\u884C\u6570\u636E\u540C\u6B65\uFF0C\u7531\u4E8E\u662F\u7B2C\u4E00\u6B21\u8FDB\u884C\u590D\u5236\uFF0C\u4ECE\u8282\u70B9\u6CA1\u6709\u590D\u5236\u504F\u79FB\u91CF\u548C\u4E3B\u8282\u70B9\u7684\u8FD0\u884CID\uFF0C\u6240\u4EE5\u53D1\u9001psync-1\u3002</li><li>\u4E3B\u8282\u70B9\u6839\u636Epsync-1\u89E3\u6790\u51FA\u5F53\u524D\u4E3A\u5168\u91CF\u590D\u5236\uFF0C\u56DE\u590D+FULLRESYNC\u54CD\u5E94\u3002</li><li>\u4ECE\u8282\u70B9\u63A5\u6536\u4E3B\u8282\u70B9\u7684\u54CD\u5E94\u6570\u636E\u4FDD\u5B58\u8FD0\u884CID\u548C\u504F\u79FB\u91CFoffset</li><li>\u4E3B\u8282\u70B9\u6267\u884Cbgsave\u4FDD\u5B58RDB\u6587\u4EF6\u5230\u672C\u5730</li><li>\u4E3B\u8282\u70B9\u53D1\u9001RDB\u6587\u4EF6\u7ED9\u4ECE\u8282\u70B9\uFF0C\u4ECE\u8282\u70B9\u628A\u63A5\u6536\u7684RDB\u6587\u4EF6\u4FDD\u5B58\u5728\u672C\u5730\u5E76\u76F4\u63A5\u4F5C\u4E3A\u4ECE\u8282\u70B9\u7684\u6570\u636E\u6587\u4EF6</li><li>\u5BF9\u4E8E\u4ECE\u8282\u70B9\u5F00\u59CB\u63A5\u6536RDB\u5FEB\u7167\u5230\u63A5\u6536\u5B8C\u6210\u671F\u95F4\uFF0C\u4E3B\u8282\u70B9\u4ECD\u7136\u54CD\u5E94\u8BFB\u5199\u547D\u4EE4\uFF0C\u56E0\u6B64\u4E3B\u8282\u70B9\u4F1A\u628A\u8FD9\u671F\u95F4\u5199\u547D\u4EE4\u6570\u636E\u4FDD\u5B58\u5728\u590D\u5236\u5BA2\u6237\u7AEF\u7F13\u51B2\u533A\u5185\uFF0C\u5F53\u4ECE\u8282\u70B9\u52A0\u8F7D\u5B8CRDB\u6587\u4EF6\u540E\uFF0C\u4E3B\u8282\u70B9\u518D\u628A\u7F13\u51B2\u533A\u5185\u7684\u6570\u636E\u53D1\u9001\u7ED9\u4ECE\u8282\u70B9\uFF0C\u4FDD\u8BC1\u4E3B\u4ECE\u4E4B\u95F4\u6570\u636E\u4E00\u81F4\u6027\u3002</li><li>\u4ECE\u8282\u70B9\u63A5\u6536\u5B8C\u4E3B\u8282\u70B9\u4F20\u9001\u6765\u7684\u5168\u90E8\u6570\u636E\u540E\u4F1A\u6E05\u7A7A\u81EA\u8EAB\u65E7\u6570\u636E</li><li>\u4ECE\u8282\u70B9\u6E05\u7A7A\u6570\u636E\u540E\u5F00\u59CB\u52A0\u8F7DRDB\u6587\u4EF6</li><li>\u4ECE\u8282\u70B9\u6210\u529F\u52A0\u8F7D\u5B8CRDB\u540E\uFF0C\u5982\u679C\u5F53\u524D\u8282\u70B9\u5F00\u542F\u4E86AOF\u6301\u4E45\u5316\u529F\u80FD\uFF0C \u5B83\u4F1A\u7ACB\u523B\u505Abgrewriteaof\u64CD\u4F5C\uFF0C\u4E3A\u4E86\u4FDD\u8BC1\u5168\u91CF\u590D\u5236\u540EAOF\u6301\u4E45\u5316\u6587\u4EF6\u7ACB\u523B\u53EF\u7528\u3002</li></ol><p><strong>\u90E8\u5206\u590D\u5236</strong> \u90E8\u5206\u590D\u5236\u4E3B\u8981\u662FRedis\u9488\u5BF9\u5168\u91CF\u590D\u5236\u7684\u8FC7\u9AD8\u5F00\u9500\u505A\u51FA\u7684\u4E00\u79CD\u4F18\u5316\u63AA\u65BD\uFF0C \u4F7F\u7528psync{runId}{offset}\u547D\u4EE4\u5B9E\u73B0\u3002\u5F53\u4ECE\u8282\u70B9\uFF08slave\uFF09\u6B63\u5728\u590D\u5236\u4E3B\u8282\u70B9 \uFF08master\uFF09\u65F6\uFF0C\u5982\u679C\u51FA\u73B0\u7F51\u7EDC\u95EA\u65AD\u6216\u8005\u547D\u4EE4\u4E22\u5931\u7B49\u5F02\u5E38\u60C5\u51B5\u65F6\uFF0C\u4ECE\u8282\u70B9\u4F1A\u5411 \u4E3B\u8282\u70B9\u8981\u6C42\u8865\u53D1\u4E22\u5931\u7684\u547D\u4EE4\u6570\u636E\uFF0C\u5982\u679C\u4E3B\u8282\u70B9\u7684\u590D\u5236\u79EF\u538B\u7F13\u51B2\u533A\u5185\u5B58\u5728\u8FD9\u90E8\u5206\u6570\u636E\u5219\u76F4\u63A5\u53D1\u9001\u7ED9\u4ECE\u8282\u70B9\uFF0C\u8FD9\u6837\u5C31\u53EF\u4EE5\u4FDD\u6301\u4E3B\u4ECE\u8282\u70B9\u590D\u5236\u7684\u4E00\u81F4\u6027\u3002 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-87600c72-cc6a-4656-81b2-e71864c97f23.png" alt="\u90E8\u5206\u590D\u5236"></p><ol><li>\u5F53\u4E3B\u4ECE\u8282\u70B9\u4E4B\u95F4\u7F51\u7EDC\u51FA\u73B0\u4E2D\u65AD\u65F6\uFF0C\u5982\u679C\u8D85\u8FC7repl-timeout\u65F6\u95F4\uFF0C\u4E3B\u8282\u70B9\u4F1A\u8BA4\u4E3A\u4ECE\u8282\u70B9\u6545\u969C\u5E76\u4E2D\u65AD\u590D\u5236\u8FDE\u63A5</li><li>\u4E3B\u4ECE\u8FDE\u63A5\u4E2D\u65AD\u671F\u95F4\u4E3B\u8282\u70B9\u4F9D\u7136\u54CD\u5E94\u547D\u4EE4\uFF0C\u4F46\u56E0\u590D\u5236\u8FDE\u63A5\u4E2D\u65AD\u547D\u4EE4\u65E0\u6CD5\u53D1\u9001\u7ED9\u4ECE\u8282\u70B9\uFF0C\u4E0D\u8FC7\u4E3B\u8282\u70B9\u5185\u90E8\u5B58\u5728\u7684\u590D\u5236\u79EF\u538B\u7F13\u51B2\u533A\uFF0C\u4F9D\u7136\u53EF\u4EE5\u4FDD\u5B58\u6700\u8FD1\u4E00\u6BB5\u65F6\u95F4\u7684\u5199\u547D\u4EE4\u6570\u636E\uFF0C\u9ED8\u8BA4\u6700\u5927\u7F13\u5B581MB\u3002</li><li>\u5F53\u4E3B\u4ECE\u8282\u70B9\u7F51\u7EDC\u6062\u590D\u540E\uFF0C\u4ECE\u8282\u70B9\u4F1A\u518D\u6B21\u8FDE\u4E0A\u4E3B\u8282\u70B9</li><li>\u5F53\u4E3B\u4ECE\u8FDE\u63A5\u6062\u590D\u540E\uFF0C\u7531\u4E8E\u4ECE\u8282\u70B9\u4E4B\u524D\u4FDD\u5B58\u4E86\u81EA\u8EAB\u5DF2\u590D\u5236\u7684\u504F\u79FB\u91CF\u548C\u4E3B\u8282\u70B9\u7684\u8FD0\u884CID\u3002\u56E0\u6B64\u4F1A\u628A\u5B83\u4EEC\u5F53\u4F5Cpsync\u53C2\u6570\u53D1\u9001\u7ED9\u4E3B\u8282\u70B9\uFF0C\u8981\u6C42\u8FDB\u884C\u90E8\u5206\u590D\u5236\u64CD\u4F5C\u3002</li><li>\u4E3B\u8282\u70B9\u63A5\u5230psync\u547D\u4EE4\u540E\u9996\u5148\u6838\u5BF9\u53C2\u6570runId\u662F\u5426\u4E0E\u81EA\u8EAB\u4E00\u81F4\uFF0C\u5982\u679C\u4E00 \u81F4\uFF0C\u8BF4\u660E\u4E4B\u524D\u590D\u5236\u7684\u662F\u5F53\u524D\u4E3B\u8282\u70B9\uFF1B\u4E4B\u540E\u6839\u636E\u53C2\u6570offset\u5728\u81EA\u8EAB\u590D\u5236\u79EF\u538B\u7F13\u51B2\u533A\u67E5\u627E\uFF0C\u5982\u679C\u504F\u79FB\u91CF\u4E4B\u540E\u7684\u6570\u636E\u5B58\u5728\u7F13\u51B2\u533A\u4E2D\uFF0C\u5219\u5BF9\u4ECE\u8282\u70B9\u53D1\u9001+CONTINUE\u54CD\u5E94\uFF0C\u8868\u793A\u53EF\u4EE5\u8FDB\u884C\u90E8\u5206\u590D\u5236\u3002</li><li>\u4E3B\u8282\u70B9\u6839\u636E\u504F\u79FB\u91CF\u628A\u590D\u5236\u79EF\u538B\u7F13\u51B2\u533A\u91CC\u7684\u6570\u636E\u53D1\u9001\u7ED9\u4ECE\u8282\u70B9\uFF0C\u4FDD\u8BC1\u4E3B\u4ECE\u590D\u5236\u8FDB\u5165\u6B63\u5E38\u72B6\u6001\u3002</li></ol><h3 id="_17-\u4E3B\u4ECE\u590D\u5236\u5B58\u5728\u54EA\u4E9B\u95EE\u9898\u5462" tabindex="-1"><a class="header-anchor" href="#_17-\u4E3B\u4ECE\u590D\u5236\u5B58\u5728\u54EA\u4E9B\u95EE\u9898\u5462" aria-hidden="true">#</a> 17.\u4E3B\u4ECE\u590D\u5236\u5B58\u5728\u54EA\u4E9B\u95EE\u9898\u5462\uFF1F</h3><p>\u4E3B\u4ECE\u590D\u5236\u867D\u597D\uFF0C\u4F46\u4E5F\u5B58\u5728\u4E00\u4E9B\u95EE\u9898\uFF1A</p><ul><li>\u4E00\u65E6\u4E3B\u8282\u70B9\u51FA\u73B0\u6545\u969C\uFF0C\u9700\u8981\u624B\u52A8\u5C06\u4E00\u4E2A\u4ECE\u8282\u70B9\u664B\u5347\u4E3A\u4E3B\u8282\u70B9\uFF0C\u540C\u65F6\u9700\u8981\u4FEE\u6539\u5E94\u7528\u65B9\u7684\u4E3B\u8282\u70B9\u5730\u5740\uFF0C\u8FD8\u9700\u8981\u547D\u4EE4\u5176\u4ED6\u4ECE\u8282\u70B9\u53BB\u590D\u5236\u65B0\u7684\u4E3B\u8282\u70B9\uFF0C\u6574\u4E2A\u8FC7\u7A0B\u90FD\u9700\u8981\u4EBA\u5DE5\u5E72\u9884\u3002</li><li>\u4E3B\u8282\u70B9\u7684\u5199\u80FD\u529B\u53D7\u5230\u5355\u673A\u7684\u9650\u5236\u3002</li><li>\u4E3B\u8282\u70B9\u7684\u5B58\u50A8\u80FD\u529B\u53D7\u5230\u5355\u673A\u7684\u9650\u5236\u3002</li></ul><p>\u7B2C\u4E00\u4E2A\u95EE\u9898\u662FRedis\u7684\u9AD8\u53EF\u7528\u95EE\u9898\uFF0C\u7B2C\u4E8C\u3001\u4E09\u4E2A\u95EE\u9898\u5C5E\u4E8ERedis\u7684\u5206\u5E03\u5F0F\u95EE\u9898\u3002</p><h3 id="_18-redis-sentinel-\u54E8\u5175-\u4E86\u89E3\u5417" tabindex="-1"><a class="header-anchor" href="#_18-redis-sentinel-\u54E8\u5175-\u4E86\u89E3\u5417" aria-hidden="true">#</a> 18.Redis Sentinel\uFF08\u54E8\u5175\uFF09\u4E86\u89E3\u5417\uFF1F</h3><p>\u4E3B\u4ECE\u590D\u5236\u5B58\u5728\u4E00\u4E2A\u95EE\u9898\uFF0C\u6CA1\u6CD5\u5B8C\u6210\u81EA\u52A8\u6545\u969C\u8F6C\u79FB\u3002\u6240\u4EE5\u6211\u4EEC\u9700\u8981\u4E00\u4E2A\u65B9\u6848\u6765\u5B8C\u6210\u81EA\u52A8\u6545\u969C\u8F6C\u79FB\uFF0C\u5B83\u5C31\u662FRedis Sentinel\uFF08\u54E8\u5175\uFF09\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-8b1a055c-f077-49ff-9432-c194d4fc3639.png" alt="Redis Sentinel"></p><p>Redis Sentinel \uFF0C\u5B83\u7531\u4E24\u90E8\u5206\u7EC4\u6210\uFF0C\u54E8\u5175\u8282\u70B9\u548C\u6570\u636E\u8282\u70B9\uFF1A</p><ul><li><strong>\u54E8\u5175\u8282\u70B9\uFF1A</strong> \u54E8\u5175\u7CFB\u7EDF\u7531\u4E00\u4E2A\u6216\u591A\u4E2A\u54E8\u5175\u8282\u70B9\u7EC4\u6210\uFF0C\u54E8\u5175\u8282\u70B9\u662F\u7279\u6B8A\u7684 Redis \u8282\u70B9\uFF0C\u4E0D\u5B58\u50A8\u6570\u636E\uFF0C\u5BF9\u6570\u636E\u8282\u70B9\u8FDB\u884C\u76D1\u63A7\u3002</li><li><strong>\u6570\u636E\u8282\u70B9\uFF1A</strong> \u4E3B\u8282\u70B9\u548C\u4ECE\u8282\u70B9\u90FD\u662F\u6570\u636E\u8282\u70B9\uFF1B</li></ul><p>\u5728\u590D\u5236\u7684\u57FA\u7840\u4E0A\uFF0C\u54E8\u5175\u5B9E\u73B0\u4E86 <strong>\u81EA\u52A8\u5316\u7684\u6545\u969C\u6062\u590D</strong> \u529F\u80FD\uFF0C\u4E0B\u9762\u662F\u5B98\u65B9\u5BF9\u4E8E\u54E8\u5175\u529F\u80FD\u7684\u63CF\u8FF0\uFF1A</p><ul><li><strong>\u76D1\u63A7\uFF08Monitoring\uFF09\uFF1A</strong> \u54E8\u5175\u4F1A\u4E0D\u65AD\u5730\u68C0\u67E5\u4E3B\u8282\u70B9\u548C\u4ECE\u8282\u70B9\u662F\u5426\u8FD0\u4F5C\u6B63\u5E38\u3002</li><li><strong>\u81EA\u52A8\u6545\u969C\u8F6C\u79FB\uFF08Automatic failover\uFF09\uFF1A</strong> \u5F53 <strong>\u4E3B\u8282\u70B9</strong> \u4E0D\u80FD\u6B63\u5E38\u5DE5\u4F5C\u65F6\uFF0C\u54E8\u5175\u4F1A\u5F00\u59CB <strong>\u81EA\u52A8\u6545\u969C\u8F6C\u79FB\u64CD\u4F5C</strong>\uFF0C\u5B83\u4F1A\u5C06\u5931\u6548\u4E3B\u8282\u70B9\u7684\u5176\u4E2D\u4E00\u4E2A <strong>\u4ECE\u8282\u70B9\u5347\u7EA7\u4E3A\u65B0\u7684\u4E3B\u8282\u70B9</strong>\uFF0C\u5E76\u8BA9\u5176\u4ED6\u4ECE\u8282\u70B9\u6539\u4E3A\u590D\u5236\u65B0\u7684\u4E3B\u8282\u70B9\u3002</li><li><strong>\u914D\u7F6E\u63D0\u4F9B\u8005\uFF08Configuration provider\uFF09\uFF1A</strong> \u5BA2\u6237\u7AEF\u5728\u521D\u59CB\u5316\u65F6\uFF0C\u901A\u8FC7\u8FDE\u63A5\u54E8\u5175\u6765\u83B7\u5F97\u5F53\u524D Redis \u670D\u52A1\u7684\u4E3B\u8282\u70B9\u5730\u5740\u3002</li><li><strong>\u901A\u77E5\uFF08Notification\uFF09\uFF1A</strong> \u54E8\u5175\u53EF\u4EE5\u5C06\u6545\u969C\u8F6C\u79FB\u7684\u7ED3\u679C\u53D1\u9001\u7ED9\u5BA2\u6237\u7AEF\u3002</li></ul><p>\u5176\u4E2D\uFF0C\u76D1\u63A7\u548C\u81EA\u52A8\u6545\u969C\u8F6C\u79FB\u529F\u80FD\uFF0C\u4F7F\u5F97\u54E8\u5175\u53EF\u4EE5\u53CA\u65F6\u53D1\u73B0\u4E3B\u8282\u70B9\u6545\u969C\u5E76\u5B8C\u6210\u8F6C\u79FB\u3002\u800C\u914D\u7F6E\u63D0\u4F9B\u8005\u548C\u901A\u77E5\u529F\u80FD\uFF0C\u5219\u9700\u8981\u5728\u4E0E\u5BA2\u6237\u7AEF\u7684\u4EA4\u4E92\u4E2D\u624D\u80FD\u4F53\u73B0\u3002</p><h3 id="_19-redis-sentinel-\u54E8\u5175-\u5B9E\u73B0\u539F\u7406\u77E5\u9053\u5417" tabindex="-1"><a class="header-anchor" href="#_19-redis-sentinel-\u54E8\u5175-\u5B9E\u73B0\u539F\u7406\u77E5\u9053\u5417" aria-hidden="true">#</a> 19.Redis Sentinel\uFF08\u54E8\u5175\uFF09\u5B9E\u73B0\u539F\u7406\u77E5\u9053\u5417\uFF1F</h3><p>\u54E8\u5175\u6A21\u5F0F\u662F\u901A\u8FC7\u54E8\u5175\u8282\u70B9\u5B8C\u6210\u5BF9\u6570\u636E\u8282\u70B9\u7684\u76D1\u63A7\u3001\u4E0B\u7EBF\u3001\u6545\u969C\u8F6C\u79FB\u3002 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-4074d72a-886a-4892-8f55-80112005aad8.png" alt="Redis Sentinel\u5DE5\u4F5C\u6D41\u7A0B"></p><ul><li><strong>\u5B9A\u65F6\u76D1\u63A7</strong><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-e7708f8d-ef34-4255-b5d0-cb300c649716.png" alt="\u4E09\u4E2A\u5B9A\u65F6\u4EFB\u52A1">Redis Sentinel\u901A\u8FC7\u4E09\u4E2A\u5B9A\u65F6\u76D1\u63A7\u4EFB\u52A1\u5B8C\u6210\u5BF9\u5404\u4E2A\u8282\u70B9\u53D1\u73B0\u548C\u76D1\u63A7\uFF1A <ol><li>\u6BCF\u969410\u79D2\uFF0C\u6BCF\u4E2ASentinel\u8282\u70B9\u4F1A\u5411\u4E3B\u8282\u70B9\u548C\u4ECE\u8282\u70B9\u53D1\u9001info\u547D\u4EE4\u83B7\u53D6\u6700\u65B0\u7684\u62D3\u6251\u7ED3\u6784</li><li>\u6BCF\u96942\u79D2\uFF0C\u6BCF\u4E2ASentinel\u8282\u70B9\u4F1A\u5411Redis\u6570\u636E\u8282\u70B9\u7684__sentinel__\uFF1Ahello \u9891\u9053\u4E0A\u53D1\u9001\u8BE5Sentinel\u8282\u70B9\u5BF9\u4E8E\u4E3B\u8282\u70B9\u7684\u5224\u65AD\u4EE5\u53CA\u5F53\u524DSentinel\u8282\u70B9\u7684\u4FE1\u606F</li><li>\u6BCF\u96941\u79D2\uFF0C\u6BCF\u4E2ASentinel\u8282\u70B9\u4F1A\u5411\u4E3B\u8282\u70B9\u3001\u4ECE\u8282\u70B9\u3001\u5176\u4F59Sentinel\u8282\u70B9\u53D1\u9001\u4E00\u6761ping\u547D\u4EE4\u505A\u4E00\u6B21\u5FC3\u8DF3\u68C0\u6D4B\uFF0C\u6765\u786E\u8BA4\u8FD9\u4E9B\u8282\u70B9\u5F53\u524D\u662F\u5426\u53EF\u8FBE</li></ol></li><li><strong>\u4E3B\u89C2\u4E0B\u7EBF\u548C\u5BA2\u89C2\u4E0B\u7EBF</strong> \u4E3B\u89C2\u4E0B\u7EBF\u5C31\u662F\u54E8\u5175\u8282\u70B9\u8BA4\u4E3A\u67D0\u4E2A\u8282\u70B9\u6709\u95EE\u9898\uFF0C\u5BA2\u89C2\u4E0B\u7EBF\u5C31\u662F\u8D85\u8FC7\u4E00\u5B9A\u6570\u91CF\u7684\u54E8\u5175\u8282\u70B9\u8BA4\u4E3A\u4E3B\u8282\u70B9\u6709\u95EE\u9898\u3002 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-11839a24-9249-48a5-8c9d-888aa80d91dc.png" alt="\u4E3B\u89C2\u4E0B\u7EBF\u548C\u5BA2\u89C2\u4E0B\u7EBF"></li></ul><ol><li><p>\u4E3B\u89C2\u4E0B\u7EBF \u6BCF\u4E2ASentinel\u8282\u70B9\u4F1A\u6BCF\u96941\u79D2\u5BF9\u4E3B\u8282\u70B9\u3001\u4ECE\u8282\u70B9\u3001\u5176\u4ED6Sentinel\u8282\u70B9\u53D1\u9001ping\u547D\u4EE4\u505A\u5FC3\u8DF3\u68C0\u6D4B\uFF0C\u5F53\u8FD9\u4E9B\u8282\u70B9\u8D85\u8FC7 down-after-milliseconds\u6CA1\u6709\u8FDB\u884C\u6709\u6548\u56DE\u590D\uFF0CSentinel\u8282\u70B9\u5C31\u4F1A\u5BF9\u8BE5\u8282\u70B9\u505A\u5931\u8D25\u5224\u5B9A\uFF0C\u8FD9\u4E2A\u884C\u4E3A\u53EB\u505A\u4E3B\u89C2\u4E0B\u7EBF\u3002</p></li><li><p>\u5BA2\u89C2\u4E0B\u7EBF \u5F53Sentinel\u4E3B\u89C2\u4E0B\u7EBF\u7684\u8282\u70B9\u662F\u4E3B\u8282\u70B9\u65F6\uFF0C\u8BE5Sentinel\u8282\u70B9\u4F1A\u901A\u8FC7sentinel is- master-down-by-addr\u547D\u4EE4\u5411\u5176\u4ED6Sentinel\u8282\u70B9\u8BE2\u95EE\u5BF9\u4E3B\u8282\u70B9\u7684\u5224\u65AD\uFF0C\u5F53\u8D85\u8FC7 &lt;quorum&gt;\u4E2A\u6570\uFF0CSentinel\u8282\u70B9\u8BA4\u4E3A\u4E3B\u8282\u70B9\u786E\u5B9E\u6709\u95EE\u9898\uFF0C\u8FD9\u65F6\u8BE5Sentinel\u8282\u70B9\u4F1A\u505A\u51FA\u5BA2\u89C2\u4E0B\u7EBF\u7684\u51B3\u5B9A</p></li></ol><ul><li><p><strong>\u9886\u5BFC\u8005Sentinel\u8282\u70B9\u9009\u4E3E</strong> Sentinel\u8282\u70B9\u4E4B\u95F4\u4F1A\u505A\u4E00\u4E2A\u9886\u5BFC\u8005\u9009\u4E3E\u7684\u5DE5\u4F5C\uFF0C\u9009\u51FA\u4E00\u4E2ASentinel\u8282\u70B9\u4F5C\u4E3A\u9886\u5BFC\u8005\u8FDB\u884C\u6545\u969C\u8F6C\u79FB\u7684\u5DE5\u4F5C\u3002Redis\u4F7F\u7528\u4E86Raft\u7B97\u6CD5\u5B9E\u73B0\u9886\u5BFC\u8005\u9009\u4E3E\u3002</p></li><li><p><strong>\u6545\u969C\u8F6C\u79FB</strong></p><p>\u9886\u5BFC\u8005\u9009\u4E3E\u51FA\u7684Sentinel\u8282\u70B9\u8D1F\u8D23\u6545\u969C\u8F6C\u79FB\uFF0C\u8FC7\u7A0B\u5982\u4E0B\uFF1A <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-0618a5e2-e94f-40d7-888a-e78019ba8f93.png" alt="\u6545\u969C\u8F6C\u79FB"></p><ol><li>\u5728\u4ECE\u8282\u70B9\u5217\u8868\u4E2D\u9009\u51FA\u4E00\u4E2A\u8282\u70B9\u4F5C\u4E3A\u65B0\u7684\u4E3B\u8282\u70B9\uFF0C\u8FD9\u4E00\u6B65\u662F\u76F8\u5BF9\u590D\u6742\u4E00\u4E9B\u7684\u4E00\u6B65</li><li>Sentinel\u9886\u5BFC\u8005\u8282\u70B9\u4F1A\u5BF9\u7B2C\u4E00\u6B65\u9009\u51FA\u6765\u7684\u4ECE\u8282\u70B9\u6267\u884Cslaveof no one\u547D\u4EE4\u8BA9\u5176\u6210\u4E3A\u4E3B\u8282\u70B9</li><li>Sentinel\u9886\u5BFC\u8005\u8282\u70B9\u4F1A\u5411\u5269\u4F59\u7684\u4ECE\u8282\u70B9\u53D1\u9001\u547D\u4EE4\uFF0C\u8BA9\u5B83\u4EEC\u6210\u4E3A\u65B0\u4E3B\u8282\u70B9\u7684\u4ECE\u8282\u70B9</li><li>Sentinel\u8282\u70B9\u96C6\u5408\u4F1A\u5C06\u539F\u6765\u7684\u4E3B\u8282\u70B9\u66F4\u65B0\u4E3A\u4ECE\u8282\u70B9\uFF0C\u5E76\u4FDD\u6301\u7740\u5BF9\u5176\u5173\u6CE8\uFF0C\u5F53\u5176\u6062\u590D\u540E\u547D\u4EE4\u5B83\u53BB\u590D\u5236\u65B0\u7684\u4E3B\u8282\u70B9</li></ol></li></ul><h3 id="_20-\u9886\u5BFC\u8005sentinel\u8282\u70B9\u9009\u4E3E\u4E86\u89E3\u5417" tabindex="-1"><a class="header-anchor" href="#_20-\u9886\u5BFC\u8005sentinel\u8282\u70B9\u9009\u4E3E\u4E86\u89E3\u5417" aria-hidden="true">#</a> 20.\u9886\u5BFC\u8005Sentinel\u8282\u70B9\u9009\u4E3E\u4E86\u89E3\u5417\uFF1F</h3><p>Redis\u4F7F\u7528\u4E86Raft\u7B97\u6CD5\u5B9E \u73B0\u9886\u5BFC\u8005\u9009\u4E3E\uFF0C\u5927\u81F4\u6D41\u7A0B\u5982\u4E0B\uFF1A <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-6586ae3c-6b33-4c9f-8137-f02fc0e6cfae.png" alt="\u9886\u5BFC\u8005Sentinel\u8282\u70B9\u9009\u4E3E"></p><ol><li>\u6BCF\u4E2A\u5728\u7EBF\u7684Sentinel\u8282\u70B9\u90FD\u6709\u8D44\u683C\u6210\u4E3A\u9886\u5BFC\u8005\uFF0C\u5F53\u5B83\u786E\u8BA4\u4E3B\u8282\u70B9\u4E3B\u89C2 \u4E0B\u7EBF\u65F6\u5019\uFF0C\u4F1A\u5411\u5176\u4ED6Sentinel\u8282\u70B9\u53D1\u9001sentinel is-master-down-by-addr\u547D\u4EE4\uFF0C \u8981\u6C42\u5C06\u81EA\u5DF1\u8BBE\u7F6E\u4E3A\u9886\u5BFC\u8005\u3002</li><li>\u6536\u5230\u547D\u4EE4\u7684Sentinel\u8282\u70B9\uFF0C\u5982\u679C\u6CA1\u6709\u540C\u610F\u8FC7\u5176\u4ED6Sentinel\u8282\u70B9\u7684sentinel is-master-down-by-addr\u547D\u4EE4\uFF0C\u5C06\u540C\u610F\u8BE5\u8BF7\u6C42\uFF0C\u5426\u5219\u62D2\u7EDD\u3002</li><li>\u5982\u679C\u8BE5Sentinel\u8282\u70B9\u53D1\u73B0\u81EA\u5DF1\u7684\u7968\u6570\u5DF2\u7ECF\u5927\u4E8E\u7B49\u4E8Emax\uFF08quorum\uFF0C num\uFF08sentinels\uFF09/2+1\uFF09\uFF0C\u90A3\u4E48\u5B83\u5C06\u6210\u4E3A\u9886\u5BFC\u8005\u3002</li><li>\u5982\u679C\u6B64\u8FC7\u7A0B\u6CA1\u6709\u9009\u4E3E\u51FA\u9886\u5BFC\u8005\uFF0C\u5C06\u8FDB\u5165\u4E0B\u4E00\u6B21\u9009\u4E3E\u3002</li></ol><h3 id="_21-\u65B0\u7684\u4E3B\u8282\u70B9\u662F\u600E\u6837\u88AB\u6311\u9009\u51FA\u6765\u7684" tabindex="-1"><a class="header-anchor" href="#_21-\u65B0\u7684\u4E3B\u8282\u70B9\u662F\u600E\u6837\u88AB\u6311\u9009\u51FA\u6765\u7684" aria-hidden="true">#</a> 21.\u65B0\u7684\u4E3B\u8282\u70B9\u662F\u600E\u6837\u88AB\u6311\u9009\u51FA\u6765\u7684\uFF1F</h3><p>\u9009\u51FA\u65B0\u7684\u4E3B\u8282\u70B9\uFF0C\u5927\u6982\u5206\u4E3A\u8FD9\u4E48\u51E0\u6B65\uFF1A <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-03976d35-20b6-4efe-aa9c-7d3759460d34.png" alt="\u65B0\u7684\u4E3B\u8282\u70B9"></p><ol><li>\u8FC7\u6EE4\uFF1A\u201C\u4E0D\u5065\u5EB7\u201D\uFF08\u4E3B\u89C2\u4E0B\u7EBF\u3001\u65AD\u7EBF\uFF09\u30015\u79D2\u5185\u6CA1\u6709\u56DE\u590D\u8FC7Sentinel\u8282 \u70B9ping\u54CD\u5E94\u3001\u4E0E\u4E3B\u8282\u70B9\u5931\u8054\u8D85\u8FC7down-after-milliseconds*10\u79D2\u3002</li><li>\u9009\u62E9slave-priority\uFF08\u4ECE\u8282\u70B9\u4F18\u5148\u7EA7\uFF09\u6700\u9AD8\u7684\u4ECE\u8282\u70B9\u5217\u8868\uFF0C\u5982\u679C\u5B58\u5728\u5219\u8FD4\u56DE\uFF0C\u4E0D\u5B58\u5728\u5219\u7EE7\u7EED\u3002</li><li>\u9009\u62E9\u590D\u5236\u504F\u79FB\u91CF\u6700\u5927\u7684\u4ECE\u8282\u70B9\uFF08\u590D\u5236\u7684\u6700\u5B8C\u6574\uFF09\uFF0C\u5982\u679C\u5B58\u5728\u5219\u8FD4 \u56DE\uFF0C\u4E0D\u5B58\u5728\u5219\u7EE7\u7EED\u3002</li><li>\u9009\u62E9runid\u6700\u5C0F\u7684\u4ECE\u8282\u70B9\u3002</li></ol><h3 id="_22-redis-\u96C6\u7FA4\u4E86\u89E3\u5417" tabindex="-1"><a class="header-anchor" href="#_22-redis-\u96C6\u7FA4\u4E86\u89E3\u5417" aria-hidden="true">#</a> 22.Redis \u96C6\u7FA4\u4E86\u89E3\u5417\uFF1F</h3><p>\u524D\u9762\u8BF4\u5230\u4E86\u4E3B\u4ECE\u5B58\u5728\u9AD8\u53EF\u7528\u548C\u5206\u5E03\u5F0F\u7684\u95EE\u9898\uFF0C\u54E8\u5175\u89E3\u51B3\u4E86\u9AD8\u53EF\u7528\u7684\u95EE\u9898\uFF0C\u800C\u96C6\u7FA4\u5C31\u662F\u7EC8\u6781\u65B9\u6848\uFF0C\u4E00\u4E3E\u89E3\u51B3\u9AD8\u53EF\u7528\u548C\u5206\u5E03\u5F0F\u95EE\u9898\u3002 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-5cbc6009-251e-4d5b-8f22-8d543938eccb.png" alt="Redis \u96C6\u7FA4\u793A\u610F\u56FE"></p><ol><li><p><strong>\u6570\u636E\u5206\u533A\uFF1A</strong> \u6570\u636E\u5206\u533A <em>(\u6216\u79F0\u6570\u636E\u5206\u7247)</em> \u662F\u96C6\u7FA4\u6700\u6838\u5FC3\u7684\u529F\u80FD\u3002\u96C6\u7FA4\u5C06\u6570\u636E\u5206\u6563\u5230\u591A\u4E2A\u8282\u70B9\uFF0C\u4E00\u65B9\u9762 \u7A81\u7834\u4E86 Redis \u5355\u673A\u5185\u5B58\u5927\u5C0F\u7684\u9650\u5236\uFF0C<strong>\u5B58\u50A8\u5BB9\u91CF\u5927\u5927\u589E\u52A0</strong>\uFF1B<strong>\u53E6\u4E00\u65B9\u9762</strong> \u6BCF\u4E2A\u4E3B\u8282\u70B9\u90FD\u53EF\u4EE5\u5BF9\u5916\u63D0\u4F9B\u8BFB\u670D\u52A1\u548C\u5199\u670D\u52A1\uFF0C<strong>\u5927\u5927\u63D0\u9AD8\u4E86\u96C6\u7FA4\u7684\u54CD\u5E94\u80FD\u529B</strong>\u3002</p></li><li><p><strong>\u9AD8\u53EF\u7528\uFF1A</strong> \u96C6\u7FA4\u652F\u6301\u4E3B\u4ECE\u590D\u5236\u548C\u4E3B\u8282\u70B9\u7684 <strong>\u81EA\u52A8\u6545\u969C\u8F6C\u79FB</strong> <em>\uFF08\u4E0E\u54E8\u5175\u7C7B\u4F3C\uFF09</em>\uFF0C\u5F53\u4EFB\u4E00\u8282\u70B9\u53D1\u751F\u6545\u969C\u65F6\uFF0C\u96C6\u7FA4\u4ECD\u7136\u53EF\u4EE5\u5BF9\u5916\u63D0\u4F9B\u670D\u52A1\u3002</p></li></ol><h3 id="_23-\u96C6\u7FA4\u4E2D\u6570\u636E\u5982\u4F55\u5206\u533A" tabindex="-1"><a class="header-anchor" href="#_23-\u96C6\u7FA4\u4E2D\u6570\u636E\u5982\u4F55\u5206\u533A" aria-hidden="true">#</a> 23.\u96C6\u7FA4\u4E2D\u6570\u636E\u5982\u4F55\u5206\u533A\uFF1F</h3><p>\u5206\u5E03\u5F0F\u7684\u5B58\u50A8\u4E2D\uFF0C\u8981\u628A\u6570\u636E\u96C6\u6309\u7167\u5206\u533A\u89C4\u5219\u6620\u5C04\u5230\u591A\u4E2A\u8282\u70B9\uFF0C\u5E38\u89C1\u7684\u6570\u636E\u5206\u533A\u89C4\u5219\u4E09\u79CD\uFF1A <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-ceb49e41-dfd7-4d1e-91f9-c299437227d2.png" alt="\u5206\u5E03\u5F0F\u6570\u636E\u5206\u533A"></p><h5 id="\u65B9\u6848\u4E00-\u8282\u70B9\u53D6\u4F59\u5206\u533A" tabindex="-1"><a class="header-anchor" href="#\u65B9\u6848\u4E00-\u8282\u70B9\u53D6\u4F59\u5206\u533A" aria-hidden="true">#</a> \u65B9\u6848\u4E00\uFF1A\u8282\u70B9\u53D6\u4F59\u5206\u533A</h5><p>\u8282\u70B9\u53D6\u4F59\u5206\u533A\uFF0C\u975E\u5E38\u597D\u7406\u89E3\uFF0C\u4F7F\u7528\u7279\u5B9A\u7684\u6570\u636E\uFF0C\u6BD4\u5982Redis\u7684\u952E\uFF0C\u6216\u8005\u7528\u6237ID\u4E4B\u7C7B\uFF0C\u5BF9\u54CD\u5E94\u7684hash\u503C\u53D6\u4F59\uFF1Ahash\uFF08key\uFF09%N\uFF0C\u6765\u786E\u5B9A\u6570\u636E\u6620\u5C04\u5230\u54EA\u4E00\u4E2A\u8282\u70B9\u4E0A\u3002</p><p>\u4E0D\u8FC7\u8BE5\u65B9\u6848\u6700\u5927\u7684\u95EE\u9898\u662F\uFF0C\u5F53\u8282\u70B9\u6570\u91CF\u53D8\u5316\u65F6\uFF0C\u5982\u6269\u5BB9\u6216\u6536\u7F29\u8282\u70B9\uFF0C\u6570\u636E\u8282\u70B9\u6620\u5C04\u5173 \u7CFB\u9700\u8981\u91CD\u65B0\u8BA1\u7B97\uFF0C\u4F1A\u5BFC\u81F4\u6570\u636E\u7684\u91CD\u65B0\u8FC1\u79FB\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-8b1fcaec-37e6-420a-9ca2-03615232af17.png" alt="\u8282\u70B9\u53D6\u4F59\u5206\u533A"></p><h5 id="\u65B9\u6848\u4E8C-\u4E00\u81F4\u6027\u54C8\u5E0C\u5206\u533A" tabindex="-1"><a class="header-anchor" href="#\u65B9\u6848\u4E8C-\u4E00\u81F4\u6027\u54C8\u5E0C\u5206\u533A" aria-hidden="true">#</a> \u65B9\u6848\u4E8C\uFF1A\u4E00\u81F4\u6027\u54C8\u5E0C\u5206\u533A</h5><p>\u5C06\u6574\u4E2A Hash \u503C\u7A7A\u95F4\u7EC4\u7EC7\u6210\u4E00\u4E2A\u865A\u62DF\u7684\u5706\u73AF\uFF0C\u7136\u540E\u5C06\u7F13\u5B58\u8282\u70B9\u7684 IP \u5730\u5740\u6216\u8005\u4E3B\u673A\u540D\u505A Hash \u53D6\u503C\u540E\uFF0C\u653E\u7F6E\u5728\u8FD9\u4E2A\u5706\u73AF\u4E0A\u3002\u5F53\u6211\u4EEC\u9700\u8981\u786E\u5B9A\u67D0\u4E00\u4E2A Key \u9700 \u8981\u5B58\u53D6\u5230\u54EA\u4E2A\u8282\u70B9\u4E0A\u7684\u65F6\u5019\uFF0C\u5148\u5BF9\u8FD9\u4E2A Key \u505A\u540C\u6837\u7684 Hash \u53D6\u503C\uFF0C\u786E\u5B9A\u5728\u73AF\u4E0A\u7684\u4F4D\u7F6E\uFF0C\u7136\u540E\u6309\u7167\u987A\u65F6\u9488\u65B9\u5411\u5728\u73AF\u4E0A\u201C\u884C\u8D70\u201D\uFF0C\u9047\u5230\u7684\u7B2C\u4E00\u4E2A\u7F13\u5B58\u8282\u70B9\u5C31\u662F\u8981\u8BBF\u95EE\u7684\u8282\u70B9\u3002</p><p>\u6BD4\u5982\u8BF4\u4E0B\u9762 \u8FD9\u5F20\u56FE\u91CC\u9762\uFF0CKey 1 \u548C Key 2 \u4F1A\u843D\u5165\u5230 Node 1 \u4E2D\uFF0CKey 3\u3001Key 4 \u4F1A\u843D\u5165\u5230 Node 2 \u4E2D\uFF0CKey 5 \u843D\u5165\u5230 Node 3 \u4E2D\uFF0CKey 6 \u843D\u5165\u5230 Node 4 \u4E2D\u3002 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-89bd1c1c-251c-4f53-bba3-fe945b2ae9e2.png" alt="\u4E00\u81F4\u6027\u54C8\u5E0C\u5206\u533A"></p><p>\u8FD9\u79CD\u65B9\u5F0F\u76F8\u6BD4\u8282\u70B9\u53D6\u4F59\u6700\u5927\u7684\u597D\u5904\u5728\u4E8E\u52A0\u5165\u548C\u5220\u9664\u8282\u70B9\u53EA\u5F71\u54CD\u54C8\u5E0C\u73AF\u4E2D \u76F8\u90BB\u7684\u8282\u70B9\uFF0C\u5BF9\u5176\u4ED6\u8282\u70B9\u65E0\u5F71\u54CD\u3002</p><p>\u4F46\u5B83\u8FD8\u662F\u5B58\u5728\u95EE\u9898\uFF1A</p><ul><li>\u7F13\u5B58\u8282\u70B9\u5728\u5706\u73AF\u4E0A\u5206\u5E03\u4E0D\u5E73\u5747\uFF0C\u4F1A\u9020\u6210\u90E8\u5206\u7F13\u5B58\u8282\u70B9\u7684\u538B\u529B\u8F83\u5927</li><li>\u5F53\u67D0\u4E2A\u8282\u70B9\u6545\u969C\u65F6\uFF0C\u8FD9\u4E2A\u8282\u70B9\u6240\u8981\u627F\u62C5\u7684\u6240\u6709\u8BBF\u95EE\u90FD\u4F1A\u88AB\u987A\u79FB\u5230\u53E6\u4E00\u4E2A\u8282\u70B9\u4E0A\uFF0C\u4F1A\u5BF9\u540E\u9762\u8FD9\u4E2A\u8282\u70B9\u9020\u6210\u529B\u3002</li></ul><h5 id="\u65B9\u6848\u4E09-\u865A\u62DF\u69FD\u5206\u533A" tabindex="-1"><a class="header-anchor" href="#\u65B9\u6848\u4E09-\u865A\u62DF\u69FD\u5206\u533A" aria-hidden="true">#</a> \u65B9\u6848\u4E09\uFF1A\u865A\u62DF\u69FD\u5206\u533A</h5><p>\u8FD9\u4E2A\u65B9\u6848 \u4E00\u81F4\u6027\u54C8\u5E0C\u5206\u533A\u7684\u57FA\u7840\u4E0A\uFF0C\u5F15\u5165\u4E86 <strong>\u865A\u62DF\u8282\u70B9</strong> \u7684\u6982\u5FF5\u3002Redis \u96C6\u7FA4\u4F7F\u7528\u7684\u4FBF\u662F\u8BE5\u65B9\u6848\uFF0C\u5176\u4E2D\u7684\u865A\u62DF\u8282\u70B9\u79F0\u4E3A <strong>\u69FD\uFF08slot\uFF09</strong>\u3002\u69FD\u662F\u4ECB\u4E8E\u6570\u636E\u548C\u5B9E\u9645\u8282\u70B9\u4E4B\u95F4\u7684\u865A\u62DF\u6982\u5FF5\uFF0C\u6BCF\u4E2A\u5B9E\u9645\u8282\u70B9\u5305\u542B\u4E00\u5B9A\u6570\u91CF\u7684\u69FD\uFF0C\u6BCF\u4E2A\u69FD\u5305\u542B\u54C8\u5E0C\u503C\u5728\u4E00\u5B9A\u8303\u56F4\u5185\u7684\u6570\u636E\u3002 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-e0ed9d62-3406-40db-8b01-c931f1020612.png" alt="\u865A\u62DF\u69FD\u5206\u914D"></p><p>\u5728\u4F7F\u7528\u4E86\u69FD\u7684\u4E00\u81F4\u6027\u54C8\u5E0C\u5206\u533A\u4E2D\uFF0C\u69FD\u662F\u6570\u636E\u7BA1\u7406\u548C\u8FC1\u79FB\u7684\u57FA\u672C\u5355\u4F4D\u3002\u69FD\u89E3\u8026\u4E86\u6570\u636E\u548C\u5B9E\u9645\u8282\u70B9 \u4E4B\u95F4\u7684\u5173\u7CFB\uFF0C\u589E\u52A0\u6216\u5220\u9664\u8282\u70B9\u5BF9\u7CFB\u7EDF\u7684\u5F71\u54CD\u5F88\u5C0F\u3002\u4ECD\u4EE5\u4E0A\u56FE\u4E3A\u4F8B\uFF0C\u7CFB\u7EDF\u4E2D\u6709 <code>4</code> \u4E2A\u5B9E\u9645\u8282\u70B9\uFF0C\u5047\u8BBE\u4E3A\u5176\u5206\u914D <code>16</code> \u4E2A\u69FD(0-15)\uFF1B</p><ul><li>\u69FD 0-3 \u4F4D\u4E8E node1\uFF1B4-7 \u4F4D\u4E8E node2\uFF1B\u4EE5\u6B64\u7C7B\u63A8....</li></ul><p>\u5982\u679C\u6B64\u65F6\u5220\u9664 <code>node2</code>\uFF0C\u53EA\u9700\u8981\u5C06\u69FD 4-7 \u91CD\u65B0\u5206\u914D\u5373\u53EF\uFF0C\u4F8B\u5982\u69FD 4-5 \u5206\u914D\u7ED9 <code>node1</code>\uFF0C\u69FD 6 \u5206\u914D\u7ED9 <code>node3</code>\uFF0C\u69FD 7 \u5206\u914D\u7ED9 <code>node4</code>\uFF0C\u6570\u636E\u5728\u5176\u4ED6\u8282\u70B9\u7684\u5206\u5E03\u4ECD\u7136\u8F83\u4E3A\u5747\u8861\u3002</p><h3 id="_24-\u80FD\u8BF4\u8BF4redis\u96C6\u7FA4\u7684\u539F\u7406\u5417" tabindex="-1"><a class="header-anchor" href="#_24-\u80FD\u8BF4\u8BF4redis\u96C6\u7FA4\u7684\u539F\u7406\u5417" aria-hidden="true">#</a> 24.\u80FD\u8BF4\u8BF4Redis\u96C6\u7FA4\u7684\u539F\u7406\u5417\uFF1F</h3><p>Redis\u96C6\u7FA4\u901A\u8FC7\u6570\u636E\u5206\u533A\u6765\u5B9E\u73B0\u6570\u636E\u7684\u5206\u5E03\u5F0F\u5B58\u50A8\uFF0C\u901A\u8FC7\u81EA\u52A8\u6545\u969C\u8F6C\u79FB\u5B9E\u73B0\u9AD8\u53EF\u7528\u3002</p><h5 id="\u96C6\u7FA4\u521B\u5EFA" tabindex="-1"><a class="header-anchor" href="#\u96C6\u7FA4\u521B\u5EFA" aria-hidden="true">#</a> \u96C6\u7FA4\u521B\u5EFA</h5><p>\u6570\u636E\u5206\u533A\u662F\u5728\u96C6\u7FA4\u521B\u5EFA\u7684\u65F6\u5019\u5B8C\u6210\u7684\u3002 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-046a512c-baab-4e3a-9409-2af58088cceb.png" alt="\u96C6\u7FA4\u521B\u5EFA"></p><p><strong>\u8BBE\u7F6E\u8282\u70B9</strong> Redis\u96C6\u7FA4\u4E00\u822C\u7531\u591A\u4E2A\u8282\u70B9\u7EC4\u6210\uFF0C\u8282\u70B9\u6570\u91CF\u81F3\u5C11\u4E3A6\u4E2A\u624D\u80FD\u4FDD\u8BC1\u7EC4\u6210\u5B8C\u6574\u9AD8\u53EF\u7528\u7684\u96C6\u7FA4\u3002\u6BCF\u4E2A\u8282\u70B9\u9700\u8981\u5F00\u542F\u914D\u7F6Ecluster-enabled yes\uFF0C\u8BA9Redis\u8FD0\u884C\u5728\u96C6\u7FA4\u6A21\u5F0F\u4E0B\u3002 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-e6064ba6-fd6f-4270-92f9-68c0bb98fd4b.png" alt="\u8282\u70B9\u548C\u63E1\u624B"><strong>\u8282\u70B9\u63E1\u624B</strong> \u8282\u70B9\u63E1\u624B\u662F\u6307\u4E00\u6279\u8FD0\u884C\u5728\u96C6\u7FA4\u6A21\u5F0F\u4E0B\u7684\u8282\u70B9\u901A\u8FC7Gossip\u534F\u8BAE\u5F7C\u6B64\u901A\u4FE1\uFF0C \u8FBE\u5230\u611F\u77E5\u5BF9\u65B9\u7684\u8FC7\u7A0B\u3002\u8282\u70B9\u63E1\u624B\u662F\u96C6\u7FA4\u5F7C\u6B64\u901A\u4FE1\u7684\u7B2C\u4E00\u6B65\uFF0C\u7531\u5BA2\u6237\u7AEF\u53D1\u8D77\u547D \u4EE4\uFF1Acluster meet{ip}{port}\u3002\u5B8C\u6210\u8282\u70B9\u63E1\u624B\u4E4B\u540E\uFF0C\u4E00\u4E2A\u4E2A\u7684Redis\u8282\u70B9\u5C31\u7EC4\u6210\u4E86\u4E00\u4E2A\u591A\u8282\u70B9\u7684\u96C6\u7FA4\u3002</p><p><strong>\u5206\u914D\u69FD\uFF08slot\uFF09</strong> Redis\u96C6\u7FA4\u628A\u6240\u6709\u7684\u6570\u636E\u6620\u5C04\u523016384\u4E2A\u69FD\u4E2D\u3002\u6BCF\u4E2A\u8282\u70B9\u5BF9\u5E94\u82E5\u5E72\u4E2A\u69FD\uFF0C\u53EA\u6709\u5F53\u8282\u70B9\u5206\u914D\u4E86\u69FD\uFF0C\u624D\u80FD\u54CD\u5E94\u548C\u8FD9\u4E9B\u69FD\u5173\u8054\u7684\u952E\u547D\u4EE4\u3002\u901A\u8FC7 cluster addslots\u547D\u4EE4\u4E3A\u8282\u70B9\u5206\u914D\u69FD\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-15341792-e7a6-428c-a109-22827e02be5f.png" alt="\u5206\u914D\u69FD"></p><h5 id="\u6545\u969C\u8F6C\u79FB" tabindex="-1"><a class="header-anchor" href="#\u6545\u969C\u8F6C\u79FB" aria-hidden="true">#</a> \u6545\u969C\u8F6C\u79FB</h5><p>Redis\u96C6\u7FA4\u7684\u6545\u969C\u8F6C\u79FB\u548C\u54E8\u5175\u7684\u6545\u969C\u8F6C\u79FB\u7C7B\u4F3C\uFF0C\u4F46\u662FRedis\u96C6\u7FA4\u4E2D\u6240\u6709\u7684\u8282\u70B9\u90FD\u8981\u627F\u62C5\u72B6\u6001\u7EF4\u62A4\u7684\u4EFB\u52A1\u3002</p><p><strong>\u6545\u969C\u53D1\u73B0</strong> Redis\u96C6\u7FA4\u5185\u8282\u70B9\u901A\u8FC7ping/pong\u6D88\u606F\u5B9E\u73B0\u8282\u70B9\u901A\u4FE1\uFF0C\u96C6\u7FA4\u4E2D\u6BCF\u4E2A\u8282\u70B9\u90FD\u4F1A\u5B9A\u671F\u5411\u5176\u4ED6\u8282\u70B9\u53D1\u9001ping\u6D88\u606F\uFF0C\u63A5\u6536\u8282\u70B9\u56DE\u590Dpong \u6D88\u606F\u4F5C\u4E3A\u54CD\u5E94\u3002\u5982\u679C\u5728cluster-node-timeout\u65F6\u95F4\u5185\u901A\u4FE1\u4E00\u76F4\u5931\u8D25\uFF0C\u5219\u53D1\u9001\u8282 \u70B9\u4F1A\u8BA4\u4E3A\u63A5\u6536\u8282\u70B9\u5B58\u5728\u6545\u969C\uFF0C\u628A\u63A5\u6536\u8282\u70B9\u6807\u8BB0\u4E3A\u4E3B\u89C2\u4E0B\u7EBF\uFF08pfail\uFF09\u72B6\u6001\u3002 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-84a2a89e-f9ea-4681-b748-1a4f1dee172b.png" alt="\u4E3B\u89C2\u4E0B\u7EBF"> \u5F53\u67D0\u4E2A\u8282\u70B9\u5224\u65AD\u53E6\u4E00\u4E2A\u8282\u70B9\u4E3B\u89C2\u4E0B\u7EBF\u540E\uFF0C\u76F8\u5E94\u7684\u8282\u70B9\u72B6\u6001\u4F1A\u8DDF\u968F\u6D88\u606F\u5728\u96C6\u7FA4\u5185\u4F20\u64AD\u3002\u901A\u8FC7Gossip\u6D88\u606F\u4F20\u64AD\uFF0C\u96C6\u7FA4\u5185\u8282\u70B9\u4E0D\u65AD\u6536\u96C6\u5230\u6545\u969C\u8282\u70B9\u7684\u4E0B\u7EBF\u62A5\u544A\u3002\u5F53 \u534A\u6570\u4EE5\u4E0A\u6301\u6709\u69FD\u7684\u4E3B\u8282\u70B9\u90FD\u6807\u8BB0\u67D0\u4E2A\u8282\u70B9\u662F\u4E3B\u89C2\u4E0B\u7EBF\u65F6\u3002\u89E6\u53D1\u5BA2\u89C2\u4E0B\u7EBF\u6D41\u7A0B\u3002 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-b61a6109-7aea-45ab-a53c-267eebb9180a.png" alt="\u4E3B\u89C2\u4E0B\u7EBF\u548C\u5BA2\u89C2\u4E0B\u7EBF"></p><p><strong>\u6545\u969C\u6062\u590D</strong></p><p>\u6545\u969C\u8282\u70B9\u53D8\u4E3A\u5BA2\u89C2\u4E0B\u7EBF\u540E\uFF0C\u5982\u679C\u4E0B\u7EBF\u8282\u70B9\u662F\u6301\u6709\u69FD\u7684\u4E3B\u8282\u70B9\u5219\u9700\u8981\u5728\u5B83 \u7684\u4ECE\u8282\u70B9\u4E2D\u9009\u51FA\u4E00\u4E2A\u66FF\u6362\u5B83\uFF0C\u4ECE\u800C\u4FDD\u8BC1\u96C6\u7FA4\u7684\u9AD8\u53EF\u7528\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-0e5a49b3-cb5a-4aef-a81f-fce50a012a39.png" alt="\u6545\u969C\u6062\u590D\u6D41\u7A0B"></p><ol><li>\u8D44\u683C\u68C0\u67E5 \u6BCF\u4E2A\u4ECE\u8282\u70B9\u90FD\u8981\u68C0\u67E5\u6700\u540E\u4E0E\u4E3B\u8282\u70B9\u65AD\u7EBF\u65F6\u95F4\uFF0C\u5224\u65AD\u662F\u5426\u6709\u8D44\u683C\u66FF\u6362\u6545\u969C \u7684\u4E3B\u8282\u70B9\u3002</li><li>\u51C6\u5907\u9009\u4E3E\u65F6\u95F4 \u5F53\u4ECE\u8282\u70B9\u7B26\u5408\u6545\u969C\u8F6C\u79FB\u8D44\u683C\u540E\uFF0C\u66F4\u65B0\u89E6\u53D1\u6545\u969C\u9009\u4E3E\u7684\u65F6\u95F4\uFF0C\u53EA\u6709\u5230\u8FBE\u8BE5 \u65F6\u95F4\u540E\u624D\u80FD\u6267\u884C\u540E\u7EED\u6D41\u7A0B\u3002</li><li>\u53D1\u8D77\u9009\u4E3E \u5F53\u4ECE\u8282\u70B9\u5B9A\u65F6\u4EFB\u52A1\u68C0\u6D4B\u5230\u8FBE\u6545\u969C\u9009\u4E3E\u65F6\u95F4\uFF08failover_auth_time\uFF09\u5230\u8FBE\u540E\uFF0C\u53D1\u8D77\u9009\u4E3E\u6D41\u7A0B\u3002</li><li>\u9009\u4E3E\u6295\u7968 \u6301\u6709\u69FD\u7684\u4E3B\u8282\u70B9\u5904\u7406\u6545\u969C\u9009\u4E3E\u6D88\u606F\u3002\u6295\u7968\u8FC7\u7A0B\u5176\u5B9E\u662F\u4E00\u4E2A\u9886\u5BFC\u8005\u9009\u4E3E\u7684\u8FC7\u7A0B\uFF0C\u5982\u96C6\u7FA4\u5185\u6709N\u4E2A\u6301\u6709\u69FD\u7684\u4E3B\u8282 \u70B9\u4EE3\u8868\u6709N\u5F20\u9009\u7968\u3002\u7531\u4E8E\u5728\u6BCF\u4E2A\u914D\u7F6E\u7EAA\u5143\u5185\u6301\u6709\u69FD\u7684\u4E3B\u8282\u70B9\u53EA\u80FD\u6295\u7968\u7ED9\u4E00\u4E2A \u4ECE\u8282\u70B9\uFF0C\u56E0\u6B64\u53EA\u80FD\u6709\u4E00\u4E2A\u4ECE\u8282\u70B9\u83B7\u5F97N/2+1\u7684\u9009\u7968\uFF0C\u4FDD\u8BC1\u80FD\u591F\u627E\u51FA\u552F\u4E00\u7684\u4ECE\u8282\u70B9\u3002 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-d0e16ea3-6683-43f4-82a3-80478703ae06.png" alt="\u9009\u4E3E\u6295\u7968"></li><li>\u66FF\u6362\u4E3B\u8282\u70B9 \u5F53\u4ECE\u8282\u70B9\u6536\u96C6\u5230\u8DB3\u591F\u7684\u9009\u7968\u4E4B\u540E\uFF0C\u89E6\u53D1\u66FF\u6362\u4E3B\u8282\u70B9\u64CD\u4F5C\u3002</li></ol><blockquote><p><strong>\u90E8\u7F72Redis\u96C6\u7FA4\u81F3\u5C11\u9700\u8981\u51E0\u4E2A\u7269\u7406\u8282\u70B9\uFF1F</strong></p></blockquote><p>\u5728\u6295\u7968\u9009\u4E3E\u7684\u73AF\u8282\uFF0C\u6545\u969C\u4E3B\u8282\u70B9\u4E5F\u7B97\u5728\u6295\u7968\u6570\u5185\uFF0C\u5047\u8BBE\u96C6\u7FA4\u5185\u8282\u70B9\u89C4\u6A21\u662F3\u4E3B3\u4ECE\uFF0C\u5176\u4E2D\u67092 \u4E2A\u4E3B\u8282\u70B9\u90E8\u7F72\u5728\u4E00\u53F0\u673A\u5668\u4E0A\uFF0C\u5F53\u8FD9\u53F0\u673A\u5668\u5B95\u673A\u65F6\uFF0C\u7531\u4E8E\u4ECE\u8282\u70B9\u65E0\u6CD5\u6536\u96C6\u5230 3/2+1\u4E2A\u4E3B\u8282\u70B9\u9009\u7968\u5C06\u5BFC\u81F4\u6545\u969C\u8F6C\u79FB\u5931\u8D25\u3002\u8FD9\u4E2A\u95EE\u9898\u4E5F\u9002\u7528\u4E8E\u6545\u969C\u53D1\u73B0\u73AF\u8282\u3002\u56E0\u6B64\u90E8\u7F72\u96C6\u7FA4\u65F6\u6240\u6709\u4E3B\u8282\u70B9\u6700\u5C11\u9700\u8981\u90E8\u7F72\u57283\u53F0\u7269\u7406\u673A\u4E0A\u624D\u80FD\u907F\u514D\u5355\u70B9\u95EE\u9898\u3002</p><h3 id="_25-\u8BF4\u8BF4\u96C6\u7FA4\u7684\u4F38\u7F29" tabindex="-1"><a class="header-anchor" href="#_25-\u8BF4\u8BF4\u96C6\u7FA4\u7684\u4F38\u7F29" aria-hidden="true">#</a> 25.\u8BF4\u8BF4\u96C6\u7FA4\u7684\u4F38\u7F29\uFF1F</h3><p>Redis\u96C6\u7FA4\u63D0\u4F9B\u4E86\u7075\u6D3B\u7684\u8282\u70B9\u6269\u5BB9\u548C\u6536\u7F29\u65B9\u6848\uFF0C\u53EF\u4EE5\u5728\u4E0D\u5F71\u54CD\u96C6\u7FA4\u5BF9\u5916\u670D\u52A1\u7684\u60C5\u51B5\u4E0B\uFF0C\u4E3A\u96C6\u7FA4\u6DFB\u52A0\u8282\u70B9\u8FDB\u884C\u6269\u5BB9\u4E5F\u53EF\u4EE5\u4E0B\u7EBF\u90E8\u5206\u8282\u70B9\u8FDB\u884C\u7F29\u5BB9\u3002 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-dd3e9494-eddb-4861-85f7-2646018d93f6.png" alt="\u96C6\u7FA4\u7684\u4F38\u7F29">\u5176\u5B9E\uFF0C\u96C6\u7FA4\u6269\u5BB9\u548C\u7F29\u5BB9\u7684\u5173\u952E\u70B9\uFF0C\u5C31\u5728\u4E8E\u69FD\u548C\u8282\u70B9\u7684\u5BF9\u5E94\u5173\u7CFB\uFF0C\u6269\u5BB9\u548C\u7F29\u5BB9\u5C31\u662F\u5C06\u4E00\u90E8\u5206<code>\u69FD</code>\u548C<code>\u6570\u636E</code>\u8FC1\u79FB\u7ED9\u65B0\u8282\u70B9\u3002</p><p>\u4F8B\u5982\u4E0B\u9762\u4E00\u4E2A\u96C6\u7FA4\uFF0C\u6BCF\u4E2A\u8282\u70B9\u5BF9\u5E94\u82E5\u5E72\u4E2A\u69FD\uFF0C\u6BCF\u4E2A\u69FD\u5BF9\u5E94\u4E00\u5B9A\u7684\u6570\u636E\uFF0C\u5982\u679C\u5E0C\u671B\u52A0\u51651\u4E2A\u8282\u70B9\u5E0C\u671B\u5B9E\u73B0\u96C6\u7FA4\u6269\u5BB9\u65F6\uFF0C\u9700\u8981\u901A\u8FC7\u76F8\u5173\u547D\u4EE4\u628A\u4E00\u90E8\u5206\u69FD\u548C\u5185\u5BB9\u8FC1\u79FB\u7ED9\u65B0\u8282\u70B9\u3002 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-1d24bb63-2b05-4db9-bd6b-983f16a4830e.png" alt="\u6269\u5BB9\u5B9E\u4F8B">\u7F29\u5BB9\u4E5F\u662F\u7C7B\u4F3C\uFF0C\u5148\u628A\u69FD\u548C\u6570\u636E\u8FC1\u79FB\u5230\u5176\u5B83\u8282\u70B9\uFF0C\u518D\u628A\u5BF9\u5E94\u7684\u8282\u70B9\u4E0B\u7EBF\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><h2 id="\u7F13\u5B58\u8BBE\u8BA1" tabindex="-1"><a class="header-anchor" href="#\u7F13\u5B58\u8BBE\u8BA1" aria-hidden="true">#</a> \u7F13\u5B58\u8BBE\u8BA1</h2><h3 id="_26-\u4EC0\u4E48\u662F\u7F13\u5B58\u51FB\u7A7F\u3001\u7F13\u5B58\u7A7F\u900F\u3001\u7F13\u5B58\u96EA\u5D29" tabindex="-1"><a class="header-anchor" href="#_26-\u4EC0\u4E48\u662F\u7F13\u5B58\u51FB\u7A7F\u3001\u7F13\u5B58\u7A7F\u900F\u3001\u7F13\u5B58\u96EA\u5D29" aria-hidden="true">#</a> 26.\u4EC0\u4E48\u662F\u7F13\u5B58\u51FB\u7A7F\u3001\u7F13\u5B58\u7A7F\u900F\u3001\u7F13\u5B58\u96EA\u5D29\uFF1F</h3><p>PS:\u8FD9\u662F\u591A\u5E74\u9EC4\u5386\u7684\u8001\u516B\u80A1\u4E86\uFF0C\u4E00\u5B9A\u8981\u7406\u89E3\u6E05\u695A\u3002</p><h5 id="\u7F13\u5B58\u51FB\u7A7F" tabindex="-1"><a class="header-anchor" href="#\u7F13\u5B58\u51FB\u7A7F" aria-hidden="true">#</a> \u7F13\u5B58\u51FB\u7A7F</h5><p>\u4E00\u4E2A\u5E76\u53D1\u8BBF\u95EE\u91CF\u6BD4\u8F83\u5927\u7684key\u5728\u67D0\u4E2A\u65F6\u95F4\u8FC7\u671F\uFF0C\u5BFC\u81F4\u6240\u6709\u7684\u8BF7\u6C42\u76F4\u63A5\u6253\u5728DB\u4E0A\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-86579ee6-9dae-4274-a5cc-af6812f48da4.png" alt="\u7F13\u5B58\u51FB\u7A7F"> \u89E3\u51B3\u2F45\u6848\uFF1A</p><ol><li><p>\u52A0\u9501\u66F4\u65B0\uFF0C\u2F50\u5982\u8BF7\u6C42\u67E5\u8BE2A\uFF0C\u53D1\u73B0\u7F13\u5B58\u4E2D\u6CA1\u6709\uFF0C\u5BF9A\u8FD9\u4E2Akey\u52A0\u9501\uFF0C\u540C\u65F6\u53BB\u6570\u636E\u5E93\u67E5\u8BE2\u6570\u636E\uFF0C\u5199\u2F0A\u7F13\u5B58\uFF0C\u518D\u8FD4\u56DE\u7ED9\u2F64\u6237\uFF0C\u8FD9\u6837\u540E\u2FAF\u7684\u8BF7\u6C42\u5C31\u53EF\u4EE5\u4ECE\u7F13\u5B58\u4E2D\u62FF\u5230\u6570\u636E\u4E86\u3002 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-cf63911a-8501-493e-a375-8b47a9f33358.png" alt="\u52A0\u9501\u66F4\u65B0"></p></li><li><p>\u5C06\u8FC7\u671F\u65F6\u95F4\u7EC4\u5408\u5199\u5728value\u4E2D\uFF0C\u901A\u8FC7\u5F02\u6B65\u7684\u2F45\u5F0F\u4E0D\u65AD\u7684\u5237\u65B0\u8FC7\u671F\u65F6\u95F4\uFF0C\u9632\u2F4C\u6B64\u7C7B\u73B0\u8C61\u3002</p></li></ol><h5 id="\u7F13\u5B58\u7A7F\u900F" tabindex="-1"><a class="header-anchor" href="#\u7F13\u5B58\u7A7F\u900F" aria-hidden="true">#</a> \u7F13\u5B58\u7A7F\u900F</h5><p>\u7F13\u5B58\u7A7F\u900F\u6307\u7684\u67E5\u8BE2\u7F13\u5B58\u548C\u6570\u636E\u5E93\u4E2D\u90FD\u4E0D\u5B58\u5728\u7684\u6570\u636E\uFF0C\u8FD9\u6837\u6BCF\u6B21\u8BF7\u6C42\u76F4\u63A5\u6253\u5230\u6570\u636E\u5E93\uFF0C\u5C31\u597D\u50CF\u7F13\u5B58\u4E0D\u5B58\u5728\u4E00\u6837\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-029951e6-8b99-4364-a570-010853deb594.png" alt="\u7F13\u5B58\u7A7F\u900F"> \u7F13\u5B58\u7A7F\u900F\u5C06\u5BFC\u81F4\u4E0D\u5B58\u5728\u7684\u6570\u636E\u6BCF\u6B21\u8BF7\u6C42\u90FD\u8981\u5230\u5B58\u50A8\u5C42\u53BB\u67E5\u8BE2\uFF0C\u5931\u53BB\u4E86\u7F13\u5B58\u4FDD\u62A4\u540E\u7AEF\u5B58\u50A8\u7684\u610F\u4E49\u3002</p><p>\u7F13\u5B58\u7A7F\u900F\u53EF\u80FD\u4F1A\u4F7F\u540E\u7AEF\u5B58\u50A8\u8D1F\u8F7D\u52A0\u5927\uFF0C\u5982\u679C\u53D1\u73B0\u5927\u91CF\u5B58\u50A8\u5C42\u7A7A\u547D\u4E2D\uFF0C\u53EF\u80FD\u5C31\u662F\u51FA\u73B0\u4E86\u7F13\u5B58\u7A7F\u900F\u95EE\u9898\u3002</p><p>\u7F13\u5B58\u7A7F\u900F\u53EF\u80FD\u6709\u4E24\u79CD\u539F\u56E0\uFF1A</p><ol><li>\u81EA\u8EAB\u4E1A\u52A1\u4EE3\u7801\u95EE\u9898</li><li>\u6076\u610F\u653B\u51FB\uFF0C\u722C\u866B\u9020\u6210\u7A7A\u547D\u4E2D</li></ol><p>\u5B83\u4E3B\u8981\u6709\u4E24\u79CD\u89E3\u51B3\u529E\u6CD5\uFF1A</p><ul><li><strong>\u7F13\u5B58\u7A7A\u503C/\u9ED8\u8BA4\u503C</strong></li></ul><p>\u4E00\u79CD\u65B9\u5F0F\u662F\u5728\u6570\u636E\u5E93\u4E0D\u547D\u4E2D\u4E4B\u540E\uFF0C\u628A\u4E00\u4E2A\u7A7A\u5BF9\u8C61\u6216\u8005\u9ED8\u8BA4\u503C\u4FDD\u5B58\u5230\u7F13\u5B58\uFF0C\u4E4B\u540E\u518D\u8BBF\u95EE\u8FD9\u4E2A\u6570\u636E\uFF0C\u5C31\u4F1A\u4ECE\u7F13\u5B58\u4E2D\u83B7\u53D6\uFF0C\u8FD9\u6837\u5C31\u4FDD\u62A4\u4E86\u6570\u636E\u5E93\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-288af5a2-ae5a-427a-95e9-b4a658b01386.png" alt="\u7F13\u5B58\u7A7A\u503C/\u9ED8\u8BA4\u503C"></p><p>\u7F13\u5B58\u7A7A\u503C\u6709\u4E24\u5927\u95EE\u9898\uFF1A</p><ol><li><p>\u7A7A\u503C\u505A\u4E86\u7F13\u5B58\uFF0C\u610F\u5473\u7740\u7F13\u5B58\u5C42\u4E2D\u5B58\u4E86\u66F4\u591A\u7684\u952E\uFF0C\u9700\u8981\u66F4\u591A\u7684\u5185\u5B58\u7A7A\u95F4\uFF08\u5982\u679C\u662F\u653B\u51FB\uFF0C\u95EE\u9898\u66F4\u4E25\u91CD\uFF09\uFF0C\u6BD4\u8F83\u6709\u6548\u7684\u65B9\u6CD5\u662F\u9488\u5BF9\u8FD9\u7C7B\u6570\u636E\u8BBE\u7F6E\u4E00\u4E2A\u8F83\u77ED\u7684\u8FC7\u671F\u65F6\u95F4\uFF0C\u8BA9\u5176\u81EA\u52A8\u5254\u9664\u3002</p></li><li><p>\u7F13\u5B58\u5C42\u548C\u5B58\u50A8\u5C42\u7684\u6570\u636E\u4F1A\u6709\u4E00\u6BB5\u65F6\u95F4\u7A97\u53E3\u7684\u4E0D\u4E00\u81F4\uFF0C\u53EF\u80FD\u4F1A\u5BF9\u4E1A\u52A1\u6709\u4E00\u5B9A\u5F71\u54CD\u3002 \u4F8B\u5982\u8FC7\u671F\u65F6\u95F4\u8BBE\u7F6E\u4E3A5\u5206\u949F\uFF0C\u5982\u679C\u6B64\u65F6\u5B58\u50A8\u5C42\u6DFB\u52A0\u4E86\u8FD9\u4E2A\u6570\u636E\uFF0C\u90A3\u6B64\u6BB5\u65F6\u95F4\u5C31\u4F1A\u51FA\u73B0\u7F13\u5B58\u5C42\u548C\u5B58\u50A8\u5C42\u6570\u636E\u7684\u4E0D\u4E00\u81F4\u3002 \u8FD9\u65F6\u5019\u53EF\u4EE5\u5229\u7528\u6D88\u606F\u961F\u5217\u6216\u8005\u5176\u5B83\u5F02\u6B65\u65B9\u5F0F\u6E05\u7406\u7F13\u5B58\u4E2D\u7684\u7A7A\u5BF9\u8C61\u3002</p></li></ol><ul><li><strong>\u5E03\u9686\u8FC7\u6EE4\u5668</strong> \u9664\u4E86\u7F13\u5B58\u7A7A\u5BF9\u8C61\uFF0C\u6211\u4EEC\u8FD8\u53EF\u4EE5\u5728\u5B58\u50A8\u548C\u7F13\u5B58\u4E4B\u524D\uFF0C\u52A0\u4E00\u4E2A\u5E03\u9686\u8FC7\u6EE4\u5668\uFF0C\u505A\u4E00\u5C42\u8FC7\u6EE4\u3002</li></ul><p>\u5E03\u9686\u8FC7\u6EE4\u5668\u91CC\u4F1A\u4FDD\u5B58\u6570\u636E\u662F\u5426\u5B58\u5728\uFF0C\u5982\u679C\u5224\u65AD\u6570\u636E\u4E0D\u4E0D\u80FD\u518D\uFF0C\u5C31\u4E0D\u4F1A\u8BBF\u95EE\u5B58\u50A8\u3002 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-0e18ea40-a2e5-4fa6-989e-e771f6e4b0fc.png" alt="\u5E03\u9686\u8FC7\u6EE4\u5668"> \u4E24\u79CD\u89E3\u51B3\u65B9\u6848\u7684\u5BF9\u6BD4\uFF1A <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-e8a382c9-4379-44ab-b1dc-fb598a228105.png" alt="\u7F13\u5B58\u7A7A\u5BF9\u8C61\u6838\u5E03\u9686\u8FC7\u6EE4\u5668\u65B9\u6848\u5BF9\u6BD4"></p><h5 id="\u7F13\u5B58\u96EA\u5D29" tabindex="-1"><a class="header-anchor" href="#\u7F13\u5B58\u96EA\u5D29" aria-hidden="true">#</a> \u7F13\u5B58\u96EA\u5D29</h5><p>\u67D0\u2F00\u65F6\u523B\u53D1\u2F63\u2F24\u89C4\u6A21\u7684\u7F13\u5B58\u5931\u6548\u7684\u60C5\u51B5\uFF0C\u4F8B\u5982\u7F13\u5B58\u670D\u52A1\u5B95\u673A\u3001\u5927\u91CFkey\u5728\u540C\u4E00\u65F6\u95F4\u8FC7\u671F\uFF0C\u8FD9\u6837\u7684\u540E\u679C\u5C31\u662F\u2F24\u91CF\u7684\u8BF7\u6C42\u8FDB\u6765\u76F4\u63A5\u6253\u5230DB\u4E0A\uFF0C\u53EF\u80FD\u5BFC\u81F4\u6574\u4E2A\u7CFB\u7EDF\u7684\u5D29\u6E83\uFF0C\u79F0\u4E3A\u96EA\u5D29\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-1464fe22-c463-4850-8989-b899510cb10e.png" alt="\u7F13\u5B58\u96EA\u5D29"> \u7F13\u5B58\u96EA\u5D29\u662F\u4E09\u5927\u7F13\u5B58\u95EE\u9898\u91CC\u6700\u4E25\u91CD\u7684\u4E00\u79CD\uFF0C\u6211\u4EEC\u6765\u770B\u770B\u600E\u4E48\u9884\u9632\u548C\u5904\u7406\u3002</p><ul><li><strong>\u63D0\u9AD8\u7F13\u5B58\u53EF\u7528\u6027</strong></li></ul><ol><li>\u96C6\u7FA4\u90E8\u7F72\uFF1A\u901A\u8FC7\u96C6\u7FA4\u6765\u63D0\u5347\u7F13\u5B58\u7684\u53EF\u7528\u6027\uFF0C\u53EF\u4EE5\u5229\u7528Redis\u672C\u8EAB\u7684Redis Cluster\u6216\u8005\u7B2C\u4E09\u65B9\u96C6\u7FA4\u65B9\u6848\u5982Codis\u7B49\u3002</li><li>\u591A\u7EA7\u7F13\u5B58\uFF1A\u8BBE\u7F6E\u591A\u7EA7\u7F13\u5B58\uFF0C\u7B2C\u4E00\u7EA7\u7F13\u5B58\u5931\u6548\u7684\u57FA\u7840\u4E0A\uFF0C\u8BBF\u95EE\u4E8C\u7EA7\u7F13\u5B58\uFF0C\u6BCF\u4E00\u7EA7\u7F13\u5B58\u7684\u5931\u6548\u65F6\u95F4\u90FD\u4E0D\u540C\u3002</li></ol><ul><li><strong>\u8FC7\u671F\u65F6\u95F4</strong></li></ul><ol><li>\u5747\u5300\u8FC7\u671F\uFF1A\u4E3A\u4E86\u907F\u514D\u5927\u91CF\u7684\u7F13\u5B58\u5728\u540C\u4E00\u65F6\u95F4\u8FC7\u671F\uFF0C\u53EF\u4EE5\u628A\u4E0D\u540C\u7684 key \u8FC7\u671F\u65F6\u95F4\u968F\u673A\u751F\u6210\uFF0C\u907F\u514D\u8FC7\u671F\u65F6\u95F4\u592A\u8FC7\u96C6\u4E2D\u3002</li><li>\u70ED\u70B9\u6570\u636E\u6C38\u4E0D\u8FC7\u671F\u3002</li></ol><ul><li><strong>\u7194\u65AD\u964D\u7EA7</strong></li></ul><ol><li>\u670D\u52A1\u7194\u65AD\uFF1A\u5F53\u7F13\u5B58\u670D\u52A1\u5668\u5B95\u673A\u6216\u8D85\u65F6\u54CD\u5E94\u65F6\uFF0C\u4E3A\u4E86\u9632\u6B62\u6574\u4E2A\u7CFB\u7EDF\u51FA\u73B0\u96EA\u5D29\uFF0C\u6682\u65F6\u505C\u6B62\u4E1A\u52A1\u670D\u52A1\u8BBF\u95EE\u7F13\u5B58\u7CFB\u7EDF\u3002</li><li>\u670D\u52A1\u964D\u7EA7\uFF1A\u5F53\u51FA\u73B0\u5927\u91CF\u7F13\u5B58\u5931\u6548\uFF0C\u800C\u4E14\u5904\u5728\u9AD8\u5E76\u53D1\u9AD8\u8D1F\u8377\u7684\u60C5\u51B5\u4E0B\uFF0C\u5728\u4E1A\u52A1\u7CFB\u7EDF\u5185\u90E8\u6682\u65F6\u820D\u5F03\u5BF9\u4E00\u4E9B\u975E\u6838\u5FC3\u7684\u63A5\u53E3\u548C\u6570\u636E\u7684\u8BF7\u6C42\uFF0C\u800C\u76F4\u63A5\u8FD4\u56DE\u4E00\u4E2A\u63D0\u524D\u51C6\u5907\u597D\u7684 fallback\uFF08\u9000\u8DEF\uFF09\u9519\u8BEF\u5904\u7406\u4FE1\u606F\u3002</li></ol><h3 id="_27-\u80FD\u8BF4\u8BF4\u5E03\u9686\u8FC7\u6EE4\u5668\u5417" tabindex="-1"><a class="header-anchor" href="#_27-\u80FD\u8BF4\u8BF4\u5E03\u9686\u8FC7\u6EE4\u5668\u5417" aria-hidden="true">#</a> 27.\u80FD\u8BF4\u8BF4\u5E03\u9686\u8FC7\u6EE4\u5668\u5417\uFF1F</h3><p>\u5E03\u9686\u8FC7\u6EE4\u5668\uFF0C\u5B83\u662F\u4E00\u4E2A\u8FDE\u7EED\u7684\u6570\u636E\u7ED3\u6784\uFF0C\u6BCF\u4E2A\u5B58\u50A8\u4F4D\u5B58\u50A8\u90FD\u662F\u4E00\u4E2A<code>bit</code>\uFF0C\u5373<code>0</code>\u6216\u8005<code>1</code>, \u6765\u6807\u8BC6\u6570\u636E\u662F\u5426\u5B58\u5728\u3002</p><p>\u5B58\u50A8\u6570\u636E\u7684\u65F6\u65F6\u5019\uFF0C\u4F7F\u7528K\u4E2A\u4E0D\u540C\u7684\u54C8\u5E0C\u51FD\u6570\u5C06\u8FD9\u4E2A\u53D8\u91CF\u6620\u5C04\u4E3Abit\u5217\u8868\u7684\u7684K\u4E2A\u70B9\uFF0C\u628A\u5B83\u4EEC\u7F6E\u4E3A1\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-d0b8d85c-85dc-4843-b4be-d5d48338a44e.png" alt="\u5E03\u9686\u8FC7\u6EE4\u5668">\u6211\u4EEC\u5224\u65AD\u7F13\u5B58key\u662F\u5426\u5B58\u5728\uFF0C\u540C\u6837\uFF0CK\u4E2A\u54C8\u5E0C\u51FD\u6570\uFF0C\u6620\u5C04\u5230bit\u5217\u8868\u4E0A\u7684K\u4E2A\u70B9\uFF0C\u5224\u65AD\u662F\u4E0D\u662F1\uFF1A</p><ul><li>\u5982\u679C\u5168\u4E0D\u662F1\uFF0C\u90A3\u4E48key\u4E0D\u5B58\u5728\uFF1B</li><li>\u5982\u679C\u90FD\u662F1\uFF0C\u4E5F\u53EA\u662F\u8868\u793Akey\u53EF\u80FD\u5B58\u5728\u3002</li></ul><p>\u5E03\u9686\u8FC7\u6EE4\u5668\u4E5F\u6709\u4E00\u4E9B\u7F3A\u70B9\uFF1A</p><ol><li>\u5B83\u5728\u5224\u65AD\u5143\u7D20\u662F\u5426\u5728\u96C6\u5408\u4E2D\u65F6\u662F\u6709\u4E00\u5B9A\u9519\u8BEF\u51E0\u7387\uFF0C\u56E0\u4E3A\u54C8\u5E0C\u7B97\u6CD5\u6709\u4E00\u5B9A\u7684\u78B0\u649E\u7684\u6982\u7387\u3002</li><li>\u4E0D\u652F\u6301\u5220\u9664\u5143\u7D20\u3002</li></ol><h3 id="_28-\u5982\u4F55\u4FDD\u8BC1\u7F13\u5B58\u548C\u6570\u636E\u5E93\u6570\u636E\u7684\u4E00\u81F4\u6027" tabindex="-1"><a class="header-anchor" href="#_28-\u5982\u4F55\u4FDD\u8BC1\u7F13\u5B58\u548C\u6570\u636E\u5E93\u6570\u636E\u7684\u4E00\u81F4\u6027" aria-hidden="true">#</a> 28.\u5982\u4F55\u4FDD\u8BC1\u7F13\u5B58\u548C\u6570\u636E\u5E93\u6570\u636E\u7684\u2F00\u81F4\u6027\uFF1F</h3><p>\u6839\u636ECAP\u7406\u8BBA\uFF0C\u5728\u4FDD\u8BC1\u53EF\u7528\u6027\u548C\u5206\u533A\u5BB9\u9519\u6027\u7684\u524D\u63D0\u4E0B\uFF0C\u65E0\u6CD5\u4FDD\u8BC1\u4E00\u81F4\u6027\uFF0C\u6240\u4EE5\u7F13\u5B58\u548C\u6570\u636E\u5E93\u7684\u7EDD\u5BF9\u4E00\u81F4\u662F\u4E0D\u53EF\u80FD\u5B9E\u73B0\u7684\uFF0C\u53EA\u80FD\u5C3D\u53EF\u80FD\u4FDD\u5B58\u7F13\u5B58\u548C\u6570\u636E\u5E93\u7684\u6700\u7EC8\u4E00\u81F4\u6027\u3002</p><h5 id="\u9009\u62E9\u5408\u9002\u7684\u7F13\u5B58\u66F4\u65B0\u7B56\u7565" tabindex="-1"><a class="header-anchor" href="#\u9009\u62E9\u5408\u9002\u7684\u7F13\u5B58\u66F4\u65B0\u7B56\u7565" aria-hidden="true">#</a> \u9009\u62E9\u5408\u9002\u7684\u7F13\u5B58\u66F4\u65B0\u7B56\u7565</h5><p><strong>1. \u5220\u9664\u7F13\u5B58\u800C\u4E0D\u662F\u66F4\u65B0\u7F13\u5B58</strong></p><p>\u5F53\u4E00\u4E2A\u7EBF\u7A0B\u5BF9\u7F13\u5B58\u7684key\u8FDB\u884C\u5199\u64CD\u4F5C\u7684\u65F6\u5019\uFF0C\u5982\u679C\u5176\u5B83\u7EBF\u7A0B\u8FDB\u6765\u8BFB\u6570\u636E\u5E93\u7684\u65F6\u5019\uFF0C\u8BFB\u5230\u7684\u5C31\u662F\u810F\u6570\u636E\uFF0C\u4EA7\u751F\u4E86\u6570\u636E\u4E0D\u4E00\u81F4\u95EE\u9898\u3002</p><p>\u76F8\u6BD4\u8F83\u800C\u8A00\uFF0C\u5220\u9664\u7F13\u5B58\u7684\u901F\u5EA6\u6BD4\u66F4\u65B0\u7F13\u5B58\u7684\u901F\u5EA6\u5FEB\u5F88\u591A\uFF0C\u6240\u7528\u65F6\u95F4\u76F8\u5BF9\u4E5F\u5C11\u5F88\u591A\uFF0C\u8BFB\u810F\u6570\u636E\u7684\u6982\u7387\u4E5F\u5C0F\u5F88\u591A\u3002 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-ebad0a67-3012-4466-a4dc-e834104c48f8.png" alt="\u5220\u9664\u7F13\u5B58\u548C\u66F4\u65B0\u7F13\u5B58"></p><ol start="2"><li><strong>\u5148\u66F4\u6570\u636E\uFF0C\u540E\u5220\u7F13\u5B58</strong> \u5148\u66F4\u6570\u636E\u5E93\u8FD8\u662F\u5148\u5220\u7F13\u5B58\uFF1F\u8FD9\u662F\u4E00\u4E2A\u95EE\u9898\u3002</li></ol><p>\u66F4\u65B0\u6570\u636E\uFF0C\u8017\u65F6\u53EF\u80FD\u5728\u5220\u9664\u7F13\u5B58\u7684\u767E\u500D\u4EE5\u4E0A\u3002\u5728\u7F13\u5B58\u4E2D\u4E0D\u5B58\u5728\u5BF9\u5E94\u7684key\uFF0C\u6570\u636E\u5E93\u53C8\u6CA1\u6709\u5B8C\u6210\u66F4\u65B0\u7684\u65F6\u5019\uFF0C\u5982\u679C\u6709\u7EBF\u7A0B\u8FDB\u6765\u8BFB\u53D6\u6570\u636E\uFF0C\u5E76\u5199\u5165\u5230\u7F13\u5B58\uFF0C\u90A3\u4E48\u5728\u66F4\u65B0\u6210\u529F\u4E4B\u540E\uFF0C\u8FD9\u4E2Akey\u5C31\u662F\u4E00\u4E2A\u810F\u6570\u636E\u3002</p><p>\u6BEB\u65E0\u7591\u95EE\uFF0C\u5148\u5220\u7F13\u5B58\uFF0C\u518D\u66F4\u6570\u636E\u5E93\uFF0C\u7F13\u5B58\u4E2Dkey\u4E0D\u5B58\u5728\u7684\u65F6\u95F4\u7684\u65F6\u95F4\u66F4\u957F\uFF0C\u6709\u66F4\u5927\u7684\u6982\u7387\u4F1A\u4EA7\u751F\u810F\u6570\u636E\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-5c929a9e-a723-43b3-8f3c-f22c83765f9d.png" alt="\u5148\u66F4\u6570\u636E\u5E93\u8FD8\u662F\u5148\u5220\u7F13\u5B58">\u76EE\u524D\u6700\u6D41\u884C\u7684\u7F13\u5B58\u8BFB\u5199\u7B56\u7565cache-aside-pattern\u5C31\u662F\u91C7\u7528\u5148\u66F4\u6570\u636E\u5E93\uFF0C\u518D\u5220\u7F13\u5B58\u7684\u65B9\u5F0F\u3002</p><h5 id="\u7F13\u5B58\u4E0D\u4E00\u81F4\u5904\u7406" tabindex="-1"><a class="header-anchor" href="#\u7F13\u5B58\u4E0D\u4E00\u81F4\u5904\u7406" aria-hidden="true">#</a> \u7F13\u5B58\u4E0D\u4E00\u81F4\u5904\u7406</h5><p>\u5982\u679C\u4E0D\u662F\u5E76\u53D1\u7279\u522B\u9AD8\uFF0C\u5BF9\u7F13\u5B58\u4F9D\u8D56\u6027\u5F88\u5F3A\uFF0C\u5176\u5B9E\u4E00\u5B9A\u7A0B\u5E8F\u7684\u4E0D\u4E00\u81F4\u662F\u53EF\u4EE5\u63A5\u53D7\u7684\u3002</p><p>\u4F46\u662F\u5982\u679C\u5BF9\u4E00\u81F4\u6027\u8981\u6C42\u6BD4\u8F83\u9AD8\uFF0C\u90A3\u5C31\u5F97\u60F3\u529E\u6CD5\u4FDD\u8BC1\u7F13\u5B58\u548C\u6570\u636E\u5E93\u4E2D\u6570\u636E\u4E00\u81F4\u3002</p><p>\u7F13\u5B58\u548C\u6570\u636E\u5E93\u6570\u636E\u4E0D\u4E00\u81F4\u5E38\u89C1\u7684\u4E24\u79CD\u539F\u56E0\uFF1A</p><ul><li>\u7F13\u5B58key\u5220\u9664\u5931\u8D25</li><li>\u5E76\u53D1\u5BFC\u81F4\u5199\u5165\u4E86\u810F\u6570\u636E</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-51b3453e-e1f1-4c65-9879-2aa59df23eca.png" alt="\u7F13\u5B58\u4E00\u81F4\u6027"></p><p><strong>\u6D88\u606F\u961F\u5217\u4FDD\u8BC1key\u88AB\u5220\u9664</strong> \u53EF\u4EE5\u5F15\u5165\u6D88\u606F\u961F\u5217\uFF0C\u628A\u8981\u5220\u9664\u7684key\u6216\u8005\u5220\u9664\u5931\u8D25\u7684key\u4E22\u5C3D\u6D88\u606F\u961F\u5217\uFF0C\u5229\u7528\u6D88\u606F\u961F\u5217\u7684\u91CD\u8BD5\u673A\u5236\uFF0C\u91CD\u8BD5\u5220\u9664\u5BF9\u5E94\u7684key\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-e4a61193-515a-409f-a436-2733abc3a86e.png" alt="\u6D88\u606F\u961F\u5217\u4FDD\u8BC1key\u88AB\u5220\u9664">\u8FD9\u79CD\u65B9\u6848\u770B\u8D77\u6765\u4E0D\u9519\uFF0C\u7F3A\u70B9\u662F\u5BF9\u4E1A\u52A1\u4EE3\u7801\u6709\u4E00\u5B9A\u7684\u4FB5\u5165\u6027\u3002</p><p><strong>\u6570\u636E\u5E93\u8BA2\u9605+\u6D88\u606F\u961F\u5217\u4FDD\u8BC1key\u88AB\u5220\u9664</strong> \u53EF\u4EE5\u7528\u4E00\u4E2A\u670D\u52A1\uFF08\u6BD4\u5982\u963F\u91CC\u7684 canal\uFF09\u53BB\u76D1\u542C\u6570\u636E\u5E93\u7684binlog\uFF0C\u83B7\u53D6\u9700\u8981\u64CD\u4F5C\u7684\u6570\u636E\u3002</p><p>\u7136\u540E\u7528\u4E00\u4E2A\u516C\u5171\u7684\u670D\u52A1\u83B7\u53D6\u8BA2\u9605\u7A0B\u5E8F\u4F20\u6765\u7684\u4FE1\u606F\uFF0C\u8FDB\u884C\u7F13\u5B58\u5220\u9664\u64CD\u4F5C\u3002 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-37c07418-9cd8-43d9-90e7-0cb43b329025.png" alt="\u6570\u636E\u5E93\u8BA2\u9605+\u6D88\u606F\u961F\u5217\u4FDD\u8BC1key\u88AB\u5220\u9664"> \u8FD9\u79CD\u65B9\u5F0F\u964D\u4F4E\u4E86\u5BF9\u4E1A\u52A1\u7684\u4FB5\u5165\uFF0C\u4F46\u5176\u5B9E\u6574\u4E2A\u7CFB\u7EDF\u7684\u590D\u6742\u5EA6\u662F\u63D0\u5347\u7684\uFF0C\u9002\u5408\u57FA\u5EFA\u5B8C\u5584\u7684\u5927\u5382\u3002</p><p><strong>\u5EF6\u65F6\u53CC\u5220\u9632\u6B62\u810F\u6570\u636E</strong> \u8FD8\u6709\u4E00\u79CD\u60C5\u51B5\uFF0C\u662F\u5728\u7F13\u5B58\u4E0D\u5B58\u5728\u7684\u65F6\u5019\uFF0C\u5199\u5165\u4E86\u810F\u6570\u636E\uFF0C\u8FD9\u79CD\u60C5\u51B5\u5728\u5148\u5220\u7F13\u5B58\uFF0C\u518D\u66F4\u6570\u636E\u5E93\u7684\u7F13\u5B58\u66F4\u65B0\u7B56\u7565\u4E0B\u53D1\u751F\u7684\u6BD4\u8F83\u591A\uFF0C\u89E3\u51B3\u65B9\u6848\u662F\u5EF6\u65F6\u53CC\u5220\u3002</p><p>\u7B80\u5355\u8BF4\uFF0C\u5C31\u662F\u5728\u7B2C\u4E00\u6B21\u5220\u9664\u7F13\u5B58\u4E4B\u540E\uFF0C\u8FC7\u4E86\u4E00\u6BB5\u65F6\u95F4\u4E4B\u540E\uFF0C\u518D\u6B21\u5220\u9664\u7F13\u5B58\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-fab24753-9c53-4432-9413-5feba07ae1e3.png" alt="\u5EF6\u65F6\u53CC\u5220"></p><p>\u8FD9\u79CD\u65B9\u5F0F\u7684\u5EF6\u65F6\u65F6\u95F4\u8BBE\u7F6E\u9700\u8981\u4ED4\u7EC6\u8003\u91CF\u548C\u6D4B\u8BD5\u3002</p><p><strong>\u8BBE\u7F6E\u7F13\u5B58\u8FC7\u671F\u65F6\u95F4\u515C\u5E95</strong></p><p>\u8FD9\u662F\u4E00\u4E2A\u6734\u7D20\u4F46\u662F\u6709\u7528\u7684\u529E\u6CD5\uFF0C\u7ED9\u7F13\u5B58\u8BBE\u7F6E\u4E00\u4E2A\u5408\u7406\u7684\u8FC7\u671F\u65F6\u95F4\uFF0C\u5373\u4F7F\u53D1\u751F\u4E86\u7F13\u5B58\u6570\u636E\u4E0D\u4E00\u81F4\u7684\u95EE\u9898\uFF0C\u5B83\u4E5F\u4E0D\u4F1A\u6C38\u8FDC\u4E0D\u4E00\u81F4\u4E0B\u53BB\uFF0C\u7F13\u5B58\u8FC7\u671F\u7684\u65F6\u5019\uFF0C\u81EA\u7136\u53C8\u4F1A\u6062\u590D\u4E00\u81F4\u3002</p><h3 id="_29-\u5982\u4F55\u4FDD\u8BC1\u672C\u5730\u7F13\u5B58\u548C\u5206\u5E03\u5F0F\u7F13\u5B58\u7684\u4E00\u81F4" tabindex="-1"><a class="header-anchor" href="#_29-\u5982\u4F55\u4FDD\u8BC1\u672C\u5730\u7F13\u5B58\u548C\u5206\u5E03\u5F0F\u7F13\u5B58\u7684\u4E00\u81F4" aria-hidden="true">#</a> 29.\u5982\u4F55\u4FDD\u8BC1\u672C\u5730\u7F13\u5B58\u548C\u5206\u5E03\u5F0F\u7F13\u5B58\u7684\u4E00\u81F4\uFF1F</h3><p>PS:\u8FD9\u9053\u9898\u9762\u8BD5\u5F88\u5C11\u95EE\uFF0C\u4F46\u5B9E\u9645\u5DE5\u4F5C\u4E2D\u5F88\u5E38\u89C1\u3002</p><p>\u5728\u65E5\u5E38\u7684\u5F00\u53D1\u4E2D\uFF0C\u6211\u4EEC\u5E38\u5E38\u91C7\u7528\u4E24\u7EA7\u7F13\u5B58\uFF1A\u672C\u5730\u7F13\u5B58+\u5206\u5E03\u5F0F\u7F13\u5B58\u3002</p><p>\u6240\u8C13\u672C\u5730\u7F13\u5B58\uFF0C\u5C31\u662F\u5BF9\u5E94\u670D\u52A1\u5668\u7684\u5185\u5B58\u7F13\u5B58\uFF0C\u6BD4\u5982Caffeine\uFF0C\u5206\u5E03\u5F0F\u7F13\u5B58\u57FA\u672C\u5C31\u662F\u91C7\u7528Redis\u3002</p><p>\u90A3\u4E48\u95EE\u9898\u6765\u4E86\uFF0C\u672C\u5730\u7F13\u5B58\u548C\u5206\u5E03\u5F0F\u7F13\u5B58\u600E\u4E48\u4FDD\u6301\u6570\u636E\u4E00\u81F4\uFF1F <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-6d4ab7e6-8337-4576-bbf0-79202a1c3331.png" alt="\u5EF6\u65F6\u53CC\u5220"> Redis\u7F13\u5B58\uFF0C\u6570\u636E\u5E93\u53D1\u751F\u66F4\u65B0\uFF0C\u76F4\u63A5\u5220\u9664\u7F13\u5B58\u7684key\u5373\u53EF\uFF0C\u56E0\u4E3A\u5BF9\u4E8E\u5E94\u7528\u7CFB\u7EDF\u800C\u8A00\uFF0C\u5B83\u662F\u4E00\u79CD\u4E2D\u5FC3\u5316\u7684\u7F13\u5B58\u3002</p><p>\u4F46\u662F\u672C\u5730\u7F13\u5B58\uFF0C\u5B83\u662F\u975E\u4E2D\u5FC3\u5316\u7684\uFF0C\u6563\u843D\u5728\u5206\u5E03\u5F0F\u670D\u52A1\u7684\u5404\u4E2A\u8282\u70B9\u4E0A\uFF0C\u6CA1\u6CD5\u901A\u8FC7\u5BA2\u6237\u7AEF\u7684\u8BF7\u6C42\u5220\u9664\u672C\u5730\u7F13\u5B58\u7684key\uFF0C\u6240\u4EE5\u5F97\u60F3\u529E\u6CD5\u901A\u77E5\u96C6\u7FA4\u6240\u6709\u8282\u70B9\uFF0C\u5220\u9664\u5BF9\u5E94\u7684\u672C\u5730\u7F13\u5B58key\u3002 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-20c15f0d-fb3c-4922-94b1-edcd856658be.png" alt="\u672C\u5730\u7F13\u5B58/\u5206\u5E03\u5F0F\u7F13\u5B58\u4FDD\u6301\u4E00\u81F4"></p><p>\u53EF\u4EE5\u91C7\u7528\u6D88\u606F\u961F\u5217\u7684\u65B9\u5F0F\uFF1A</p><ol><li>\u91C7\u7528Redis\u672C\u8EAB\u7684Pub/Sub\u673A\u5236\uFF0C\u5206\u5E03\u5F0F\u96C6\u7FA4\u7684\u6240\u6709\u8282\u70B9\u8BA2\u9605\u5220\u9664\u672C\u5730\u7F13\u5B58\u9891\u9053\uFF0C\u5220\u9664Redis\u7F13\u5B58\u7684\u8282\u70B9\uFF0C\u540C\u4E8B\u53D1\u5E03\u5220\u9664\u672C\u5730\u7F13\u5B58\u6D88\u606F\uFF0C\u8BA2\u9605\u8005\u4EEC\u8BA2\u9605\u5230\u6D88\u606F\u540E\uFF0C\u5220\u9664\u5BF9\u5E94\u7684\u672C\u5730key\u3002 \u4F46\u662FRedis\u7684\u53D1\u5E03\u8BA2\u9605\u4E0D\u662F\u53EF\u9760\u7684\uFF0C\u4E0D\u80FD\u4FDD\u8BC1\u4E00\u5B9A\u5220\u9664\u6210\u529F\u3002</li><li>\u5F15\u5165\u4E13\u4E1A\u7684\u6D88\u606F\u961F\u5217\uFF0C\u6BD4\u5982RocketMQ\uFF0C\u4FDD\u8BC1\u6D88\u606F\u7684\u53EF\u9760\u6027\uFF0C\u4F46\u662F\u589E\u52A0\u4E86\u7CFB\u7EDF\u7684\u590D\u6742\u5EA6\u3002</li><li>\u8BBE\u7F6E\u9002\u5F53\u7684\u8FC7\u671F\u65F6\u95F4\u515C\u5E95\uFF0C\u672C\u5730\u7F13\u5B58\u53EF\u4EE5\u8BBE\u7F6E\u76F8\u5BF9\u77ED\u4E00\u4E9B\u7684\u8FC7\u671F\u65F6\u95F4\u3002</li></ol><h3 id="_30-\u600E\u4E48\u5904\u7406\u70EDkey" tabindex="-1"><a class="header-anchor" href="#_30-\u600E\u4E48\u5904\u7406\u70EDkey" aria-hidden="true">#</a> 30.\u600E\u4E48\u5904\u7406\u70EDkey\uFF1F</h3><blockquote><p><strong>\u4EC0\u4E48\u662F\u70EDKey\uFF1F</strong> \u6240\u8C13\u7684\u70EDkey\uFF0C\u5C31\u662F\u8BBF\u95EE\u9891\u7387\u6BD4\u8F83\u7684key\u3002</p></blockquote><p>\u6BD4\u5982\uFF0C\u70ED\u95E8\u65B0\u95FB\u4E8B\u4EF6\u6216\u5546\u54C1\uFF0C\u8FD9\u7C7Bkey\u901A\u5E38\u6709\u5927\u6D41\u91CF\u7684\u8BBF\u95EE\uFF0C\u5BF9\u5B58\u50A8\u8FD9\u7C7B\u4FE1\u606F\u7684 Redis\u6765\u8BF4\uFF0C\u662F\u4E0D\u5C0F\u7684\u538B\u529B\u3002</p><p>\u5047\u5982Redis\u96C6\u7FA4\u90E8\u7F72\uFF0C\u70EDkey\u53EF\u80FD\u4F1A\u9020\u6210\u6574\u4F53\u6D41\u91CF\u7684\u4E0D\u5747\u8861\uFF0C\u4E2A\u522B\u8282\u70B9\u51FA\u73B0OPS\u8FC7\u5927\u7684\u60C5\u51B5\uFF0C\u6781\u7AEF\u60C5\u51B5\u4E0B\u70ED\u70B9key\u751A\u81F3\u4F1A\u8D85\u8FC7 Redis\u672C\u8EAB\u80FD\u591F\u627F\u53D7\u7684OPS\u3002</p><blockquote><p><strong>\u600E\u4E48\u5904\u7406\u70EDkey\uFF1F</strong></p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-6fa972ec-5531-48f2-a608-4465d79d4518.png" alt="\u70EDkey\u5904\u7406"> \u5BF9\u70EDkey\u7684\u5904\u7406\uFF0C\u6700\u5173\u952E\u7684\u662F\u5BF9\u70ED\u70B9key\u7684\u76D1\u63A7\uFF0C\u53EF\u4EE5\u4ECE\u8FD9\u4E9B\u7AEF\u6765\u76D1\u63A7\u70ED\u70B9key:</p><ol><li><p>\u5BA2\u6237\u7AEF \u5BA2\u6237\u7AEF\u5176\u5B9E\u662F\u8DDD\u79BBkey\u201C\u6700\u8FD1\u201D\u7684\u5730\u65B9\uFF0C\u56E0\u4E3ARedis\u547D\u4EE4\u5C31\u662F\u4ECE\u5BA2\u6237\u7AEF\u53D1\u51FA\u7684\uFF0C\u4F8B\u5982\u5728\u5BA2\u6237\u7AEF\u8BBE\u7F6E\u5168\u5C40\u5B57\u5178\uFF08key\u548C\u8C03\u7528\u6B21\u6570\uFF09\uFF0C\u6BCF\u6B21\u8C03\u7528Redis\u547D\u4EE4\u65F6\uFF0C\u4F7F\u7528\u8FD9\u4E2A\u5B57\u5178\u8FDB\u884C\u8BB0\u5F55\u3002</p></li><li><p>\u4EE3\u7406\u7AEF \u50CFTwemproxy\u3001Codis\u8FD9\u4E9B\u57FA\u4E8E\u4EE3\u7406\u7684Redis\u5206\u5E03\u5F0F\u67B6\u6784\uFF0C\u6240\u6709\u5BA2\u6237\u7AEF\u7684\u8BF7\u6C42\u90FD\u662F\u901A\u8FC7\u4EE3\u7406\u7AEF\u5B8C\u6210\u7684\uFF0C\u53EF\u4EE5\u5728\u4EE3\u7406\u7AEF\u8FDB\u884C\u6536\u96C6\u7EDF\u8BA1\u3002</p></li><li><p>Redis\u670D\u52A1\u7AEF \u4F7F\u7528monitor\u547D\u4EE4\u7EDF\u8BA1\u70ED\u70B9key\u662F\u5F88\u591A\u5F00\u53D1\u548C\u8FD0\u7EF4\u4EBA\u5458\u9996\u5148\u60F3\u5230\uFF0Cmonitor\u547D\u4EE4\u53EF\u4EE5\u76D1\u63A7\u5230Redis\u6267\u884C\u7684\u6240\u6709\u547D\u4EE4\u3002</p></li></ol><p>\u53EA\u8981\u76D1\u63A7\u5230\u4E86\u70EDkey\uFF0C\u5BF9\u70EDkey\u7684\u5904\u7406\u5C31\u7B80\u5355\u4E86\uFF1A</p><ol><li><p>\u628A\u70EDkey\u6253\u6563\u5230\u4E0D\u540C\u7684\u670D\u52A1\u5668\uFF0C\u964D\u4F4E\u538B\u2F12</p></li><li><p>\u52A0\u2F0A\u2F06\u7EA7\u7F13\u5B58\uFF0C\u63D0\u524D\u52A0\u8F7D\u70EDkey\u6570\u636E\u5230\u5185\u5B58\u4E2D\uFF0C\u5982\u679Credis\u5B95\u673A\uFF0C\u2F9B\u5185\u5B58\u67E5\u8BE2</p></li></ol><h3 id="_31-\u7F13\u5B58\u9884\u70ED\u600E\u4E48\u505A\u5462" tabindex="-1"><a class="header-anchor" href="#_31-\u7F13\u5B58\u9884\u70ED\u600E\u4E48\u505A\u5462" aria-hidden="true">#</a> 31.\u7F13\u5B58\u9884\u70ED\u600E\u4E48\u505A\u5462\uFF1F</h3><p>\u6240\u8C13\u7F13\u5B58\u9884\u70ED\uFF0C\u5C31\u662F\u63D0\u524D\u628A\u6570\u636E\u5E93\u91CC\u7684\u6570\u636E\u5237\u5230\u7F13\u5B58\u91CC\uFF0C\u901A\u5E38\u6709\u8FD9\u4E9B\u65B9\u6CD5\uFF1A</p><p>1\u3001\u76F4\u63A5\u5199\u4E2A\u7F13\u5B58\u5237\u65B0\u9875\u9762\u6216\u8005\u63A5\u53E3\uFF0C\u4E0A\u7EBF\u65F6\u624B\u52A8\u64CD\u4F5C</p><p>2\u3001\u6570\u636E\u91CF\u4E0D\u5927\uFF0C\u53EF\u4EE5\u5728\u9879\u76EE\u542F\u52A8\u7684\u65F6\u5019\u81EA\u52A8\u8FDB\u884C\u52A0\u8F7D</p><p>3\u3001\u5B9A\u65F6\u4EFB\u52A1\u5237\u65B0\u7F13\u5B58.</p><h3 id="_32-\u70ED\u70B9key\u91CD\u5EFA-\u95EE\u9898-\u89E3\u51B3" tabindex="-1"><a class="header-anchor" href="#_32-\u70ED\u70B9key\u91CD\u5EFA-\u95EE\u9898-\u89E3\u51B3" aria-hidden="true">#</a> 32.\u70ED\u70B9key\u91CD\u5EFA\uFF1F\u95EE\u9898\uFF1F\u89E3\u51B3\uFF1F</h3><p>\u5F00\u53D1\u7684\u65F6\u5019\u4E00\u822C\u4F7F\u7528\u201C\u7F13\u5B58+\u8FC7\u671F\u65F6\u95F4\u201D\u7684\u7B56\u7565\uFF0C\u65E2\u53EF\u4EE5\u52A0\u901F\u6570\u636E\u8BFB\u5199\uFF0C\u53C8\u4FDD\u8BC1\u6570\u636E\u7684\u5B9A\u671F\u66F4\u65B0\uFF0C\u8FD9\u79CD\u6A21\u5F0F\u57FA\u672C\u80FD\u591F\u6EE1\u8DB3\u7EDD\u5927\u90E8\u5206\u9700\u6C42\u3002</p><p>\u4F46\u662F\u6709\u4E24\u4E2A\u95EE\u9898\u5982\u679C\u540C\u65F6\u51FA\u73B0\uFF0C\u53EF\u80FD\u5C31\u4F1A\u51FA\u73B0\u6BD4\u8F83\u5927\u7684\u95EE\u9898\uFF1A</p><ul><li><p>\u5F53\u524Dkey\u662F\u4E00\u4E2A\u70ED\u70B9key\uFF08\u4F8B\u5982\u4E00\u4E2A\u70ED\u95E8\u7684\u5A31\u4E50\u65B0\u95FB\uFF09\uFF0C\u5E76\u53D1\u91CF\u975E\u5E38\u5927\u3002</p></li><li><p>\u91CD\u5EFA\u7F13\u5B58\u4E0D\u80FD\u5728\u77ED\u65F6\u95F4\u5B8C\u6210\uFF0C\u53EF\u80FD\u662F\u4E00\u4E2A\u590D\u6742\u8BA1\u7B97\uFF0C\u4F8B\u5982\u590D\u6742\u7684 SQL\u3001\u591A\u6B21IO\u3001\u591A\u4E2A\u4F9D\u8D56\u7B49\u3002 \u5728\u7F13\u5B58\u5931\u6548\u7684\u77AC\u95F4\uFF0C\u6709\u5927\u91CF\u7EBF\u7A0B\u6765\u91CD\u5EFA\u7F13\u5B58\uFF0C\u9020\u6210\u540E\u7AEF\u8D1F\u8F7D\u52A0\u5927\uFF0C\u751A\u81F3\u53EF\u80FD\u4F1A\u8BA9\u5E94\u7528\u5D29\u6E83\u3002</p></li></ul><blockquote><p><strong>\u600E\u4E48\u5904\u7406\u5462\uFF1F</strong></p></blockquote><p>\u8981\u89E3\u51B3\u8FD9\u4E2A\u95EE\u9898\u4E5F\u4E0D\u662F\u5F88\u590D\u6742\uFF0C\u89E3\u51B3\u95EE\u9898\u7684\u8981\u70B9\u5728\u4E8E\uFF1A</p><ul><li>\u51CF\u5C11\u91CD\u5EFA\u7F13\u5B58\u7684\u6B21\u6570\u3002</li><li>\u6570\u636E\u5C3D\u53EF\u80FD\u4E00\u81F4\u3002</li><li>\u8F83\u5C11\u7684\u6F5C\u5728\u5371\u9669\u3002</li></ul><p>\u6240\u4EE5\u4E00\u822C\u91C7\u7528\u5982\u4E0B\u65B9\u5F0F\uFF1A</p><ol><li>\u4E92\u65A5\u9501\uFF08mutex key\uFF09 \u8FD9\u79CD\u65B9\u6CD5\u53EA\u5141\u8BB8\u4E00\u4E2A\u7EBF\u7A0B\u91CD\u5EFA\u7F13\u5B58\uFF0C\u5176\u4ED6\u7EBF\u7A0B\u7B49\u5F85\u91CD\u5EFA\u7F13\u5B58\u7684\u7EBF\u7A0B\u6267\u884C\u5B8C\uFF0C\u91CD\u65B0\u4ECE\u7F13\u5B58\u83B7\u53D6\u6570\u636E\u5373\u53EF\u3002</li><li>\u6C38\u8FDC\u4E0D\u8FC7\u671F \u201C\u6C38\u8FDC\u4E0D\u8FC7\u671F\u201D\u5305\u542B\u4E24\u5C42\u610F\u601D\uFF1A</li></ol><ul><li>\u4ECE\u7F13\u5B58\u5C42\u9762\u6765\u770B\uFF0C\u786E\u5B9E\u6CA1\u6709\u8BBE\u7F6E\u8FC7\u671F\u65F6\u95F4\uFF0C\u6240\u4EE5\u4E0D\u4F1A\u51FA\u73B0\u70ED\u70B9key\u8FC7\u671F\u540E\u4EA7\u751F\u7684\u95EE\u9898\uFF0C\u4E5F\u5C31\u662F\u201C\u7269\u7406\u201D\u4E0D\u8FC7\u671F\u3002</li><li>\u4ECE\u529F\u80FD\u5C42\u9762\u6765\u770B\uFF0C\u4E3A\u6BCF\u4E2Avalue\u8BBE\u7F6E\u4E00\u4E2A\u903B\u8F91\u8FC7\u671F\u65F6\u95F4\uFF0C\u5F53\u53D1\u73B0\u8D85\u8FC7\u903B\u8F91\u8FC7\u671F\u65F6\u95F4\u540E\uFF0C\u4F1A\u4F7F\u7528\u5355\u72EC\u7684\u7EBF\u7A0B\u53BB\u6784\u5EFA\u7F13\u5B58\u3002</li></ul><h3 id="_33-\u65E0\u5E95\u6D1E\u95EE\u9898\u5417-\u5982\u4F55\u89E3\u51B3" tabindex="-1"><a class="header-anchor" href="#_33-\u65E0\u5E95\u6D1E\u95EE\u9898\u5417-\u5982\u4F55\u89E3\u51B3" aria-hidden="true">#</a> 33.\u65E0\u5E95\u6D1E\u95EE\u9898\u5417\uFF1F\u5982\u4F55\u89E3\u51B3\uFF1F</h3><blockquote><p><strong>\u4EC0\u4E48\u662F\u65E0\u5E95\u6D1E\u95EE\u9898\uFF1F</strong></p></blockquote><p>2010\u5E74\uFF0CFacebook\u7684Memcache\u8282\u70B9\u5DF2\u7ECF\u8FBE\u5230\u4E863000\u4E2A\uFF0C\u627F\u8F7D\u7740TB\u7EA7\u522B\u7684\u7F13\u5B58\u6570\u636E\u3002\u4F46\u5F00\u53D1\u548C\u8FD0\u7EF4\u4EBA\u5458\u53D1\u73B0\u4E86\u4E00\u4E2A\u95EE\u9898\uFF0C\u4E3A\u4E86\u6EE1\u8DB3\u4E1A\u52A1\u8981\u6C42\u6DFB\u52A0\u4E86\u5927\u91CF\u65B0Memcache\u8282\u70B9\uFF0C\u4F46\u662F\u53D1\u73B0\u6027\u80FD\u4E0D\u4F46\u6CA1\u6709\u597D\u8F6C\u53CD\u800C\u4E0B\u964D\u4E86\uFF0C\u5F53\u65F6\u5C06\u8FD9 \u79CD\u73B0\u8C61\u79F0\u4E3A\u7F13\u5B58\u7684\u201C<strong>\u65E0\u5E95\u6D1E</strong>\u201D\u73B0\u8C61\u3002</p><p>\u90A3\u4E48\u4E3A\u4EC0\u4E48\u4F1A\u4EA7\u751F\u8FD9\u79CD\u73B0\u8C61\u5462?</p><p>\u901A\u5E38\u6765\u8BF4\u6DFB\u52A0\u8282\u70B9\u4F7F\u5F97Memcache\u96C6\u7FA4 \u6027\u80FD\u5E94\u8BE5\u66F4\u5F3A\u4E86\uFF0C\u4F46\u4E8B\u5B9E\u5E76\u975E\u5982\u6B64\u3002\u952E\u503C\u6570\u636E\u5E93\u7531\u4E8E\u901A\u5E38\u91C7\u7528\u54C8\u5E0C\u51FD\u6570\u5C06 key\u6620\u5C04\u5230\u5404\u4E2A\u8282\u70B9\u4E0A\uFF0C\u9020\u6210key\u7684\u5206\u5E03\u4E0E\u4E1A\u52A1\u65E0\u5173\uFF0C\u4F46\u662F\u7531\u4E8E\u6570\u636E\u91CF\u548C\u8BBF\u95EE\u91CF\u7684\u6301\u7EED\u589E\u957F\uFF0C\u9020\u6210\u9700\u8981\u6DFB\u52A0\u5927\u91CF\u8282\u70B9\u505A\u6C34\u5E73\u6269\u5BB9\uFF0C\u5BFC\u81F4\u952E\u503C\u5206\u5E03\u5230\u66F4\u591A\u7684 \u8282\u70B9\u4E0A\uFF0C\u6240\u4EE5\u65E0\u8BBA\u662FMemcache\u8FD8\u662FRedis\u7684\u5206\u5E03\u5F0F\uFF0C\u6279\u91CF\u64CD\u4F5C\u901A\u5E38\u9700\u8981\u4ECE\u4E0D\u540C\u8282\u70B9\u4E0A\u83B7\u53D6\uFF0C\u76F8\u6BD4\u4E8E\u5355\u673A\u6279\u91CF\u64CD\u4F5C\u53EA\u6D89\u53CA\u4E00\u6B21\u7F51\u7EDC\u64CD\u4F5C\uFF0C\u5206\u5E03\u5F0F\u6279\u91CF\u64CD\u4F5C\u4F1A\u6D89\u53CA\u591A\u6B21\u7F51\u7EDC\u65F6\u95F4\u3002</p><blockquote><p><strong>\u65E0\u5E95\u6D1E\u95EE\u9898\u5982\u4F55\u4F18\u5316\u5462\uFF1F</strong></p></blockquote><p>\u5148\u5206\u6790\u4E00\u4E0B\u65E0\u5E95\u6D1E\u95EE\u9898\uFF1A</p><ul><li><p>\u5BA2\u6237\u7AEF\u4E00\u6B21\u6279\u91CF\u64CD\u4F5C\u4F1A\u6D89\u53CA\u591A\u6B21\u7F51\u7EDC\u64CD\u4F5C\uFF0C\u4E5F\u5C31\u610F\u5473\u7740\u6279\u91CF\u64CD\u4F5C\u4F1A\u968F\u7740\u8282\u70B9\u7684\u589E\u591A\uFF0C\u8017\u65F6\u4F1A\u4E0D\u65AD\u589E\u5927\u3002</p></li><li><p>\u7F51\u7EDC\u8FDE\u63A5\u6570\u53D8\u591A\uFF0C\u5BF9\u8282\u70B9\u7684\u6027\u80FD\u4E5F\u6709\u4E00\u5B9A\u5F71\u54CD\u3002</p></li></ul><p>\u5E38\u89C1\u7684\u4F18\u5316\u601D\u8DEF\u5982\u4E0B\uFF1A</p><ul><li><p>\u547D\u4EE4\u672C\u8EAB\u7684\u4F18\u5316\uFF0C\u4F8B\u5982\u4F18\u5316\u64CD\u4F5C\u8BED\u53E5\u7B49\u3002</p></li><li><p>\u51CF\u5C11\u7F51\u7EDC\u901A\u4FE1\u6B21\u6570\u3002</p></li><li><p>\u964D\u4F4E\u63A5\u5165\u6210\u672C\uFF0C\u4F8B\u5982\u5BA2\u6237\u7AEF\u4F7F\u7528\u957F\u8FDE/\u8FDE\u63A5\u6C60\u3001NIO\u7B49\u3002</p></li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><h2 id="redis\u8FD0\u7EF4" tabindex="-1"><a class="header-anchor" href="#redis\u8FD0\u7EF4" aria-hidden="true">#</a> Redis\u8FD0\u7EF4</h2><h3 id="_34-redis\u62A5\u5185\u5B58\u4E0D\u8DB3\u600E\u4E48\u5904\u7406" tabindex="-1"><a class="header-anchor" href="#_34-redis\u62A5\u5185\u5B58\u4E0D\u8DB3\u600E\u4E48\u5904\u7406" aria-hidden="true">#</a> 34.Redis\u62A5\u5185\u5B58\u4E0D\u8DB3\u600E\u4E48\u5904\u7406\uFF1F</h3><p>Redis \u5185\u5B58\u4E0D\u8DB3\u6709\u8FD9\u4E48\u51E0\u79CD\u5904\u7406\u65B9\u5F0F\uFF1A</p><ul><li>\u4FEE\u6539\u914D\u7F6E\u6587\u4EF6 redis.conf \u7684 maxmemory \u53C2\u6570\uFF0C\u589E\u52A0 Redis \u53EF\u7528\u5185\u5B58</li><li>\u4E5F\u53EF\u4EE5\u901A\u8FC7\u547D\u4EE4set maxmemory\u52A8\u6001\u8BBE\u7F6E\u5185\u5B58\u4E0A\u9650</li><li>\u4FEE\u6539\u5185\u5B58\u6DD8\u6C70\u7B56\u7565\uFF0C\u53CA\u65F6\u91CA\u653E\u5185\u5B58\u7A7A\u95F4</li><li>\u4F7F\u7528 Redis \u96C6\u7FA4\u6A21\u5F0F\uFF0C\u8FDB\u884C\u6A2A\u5411\u6269\u5BB9\u3002</li></ul><h3 id="_35-redis\u7684\u8FC7\u671F\u6570\u636E\u56DE\u6536\u7B56\u7565\u6709\u54EA\u4E9B" tabindex="-1"><a class="header-anchor" href="#_35-redis\u7684\u8FC7\u671F\u6570\u636E\u56DE\u6536\u7B56\u7565\u6709\u54EA\u4E9B" aria-hidden="true">#</a> 35.Redis\u7684\u8FC7\u671F\u6570\u636E\u56DE\u6536\u7B56\u7565\u6709\u54EA\u4E9B\uFF1F</h3><p>Redis\u4E3B\u8981\u67092\u79CD\u8FC7\u671F\u6570\u636E\u56DE\u6536\u7B56\u7565\uFF1A <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-de726c67-e56f-4f4b-96be-5cb998659541.png" alt="\u5728\u8FD9\u91CC\u63D2\u5165\u56FE\u7247\u63CF\u8FF0"></p><p><strong>\u60F0\u6027\u5220\u9664</strong></p><p>\u60F0\u6027\u5220\u9664\u6307\u7684\u662F\u5F53\u6211\u4EEC\u67E5\u8BE2key\u7684\u65F6\u5019\u624D\u5BF9key\u8FDB\u2F8F\u68C0\u6D4B\uFF0C\u5982\u679C\u5DF2\u7ECF\u8FBE\u5230\u8FC7\u671F\u65F6\u95F4\uFF0C\u5219\u5220\u9664\u3002\u663E\u7136\uFF0C\u4ED6\u6709\u2F00\u4E2A\u7F3A\u70B9\u5C31\u662F\u5982\u679C\u8FD9\u4E9B\u8FC7\u671F\u7684key\u6CA1\u6709\u88AB\u8BBF\u95EE\uFF0C\u90A3\u4E48\u4ED6\u5C31\u2F00\u76F4\u2F46\u6CD5\u88AB\u5220\u9664\uFF0C\u2F7D\u4E14\u2F00\u76F4\u5360\u2F64\u5185\u5B58\u3002</p><p><strong>\u5B9A\u671F\u5220\u9664</strong></p><p>\u5B9A\u671F\u5220\u9664\u6307\u7684\u662FRedis\u6BCF\u9694\u2F00\u6BB5\u65F6\u95F4\u5BF9\u6570\u636E\u5E93\u505A\u2F00\u6B21\u68C0\u67E5\uFF0C\u5220\u9664\u2FA5\u2FAF\u7684\u8FC7\u671Fkey\u3002\u7531\u4E8E\u4E0D\u53EF\u80FD\u5BF9\u6240\u6709key\u53BB\u505A\u8F6E\u8BE2\u6765\u5220\u9664\uFF0C\u6240\u4EE5Redis\u4F1A\u6BCF\u6B21\u968F\u673A\u53D6\u2F00\u4E9Bkey\u53BB\u505A\u68C0\u67E5\u548C\u5220\u9664\u3002</p><h3 id="_36-redis\u6709\u54EA\u4E9B\u5185\u5B58\u6EA2\u51FA\u63A7\u5236-\u5185\u5B58\u6DD8\u6C70\u7B56\u7565" tabindex="-1"><a class="header-anchor" href="#_36-redis\u6709\u54EA\u4E9B\u5185\u5B58\u6EA2\u51FA\u63A7\u5236-\u5185\u5B58\u6DD8\u6C70\u7B56\u7565" aria-hidden="true">#</a> 36.Redis\u6709\u54EA\u4E9B\u5185\u5B58\u6EA2\u51FA\u63A7\u5236/\u5185\u5B58\u6DD8\u6C70\u7B56\u7565\uFF1F</h3><p>Redis\u6240\u7528\u5185\u5B58\u8FBE\u5230maxmemory\u4E0A\u9650\u65F6\u4F1A\u89E6\u53D1\u76F8\u5E94\u7684\u6EA2\u51FA\u63A7\u5236\u7B56\u7565\uFF0CRedis\u652F\u6301\u516D\u79CD\u7B56\u7565\uFF1A <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-5be7405c-ee11-4d2b-bea4-9598f10a1b17.png" alt="Redis\u516D\u79CD\u5185\u5B58\u6EA2\u51FA\u63A7\u5236\u7B56\u7565"></p><ol><li>noeviction\uFF1A\u9ED8\u8BA4\u7B56\u7565\uFF0C\u4E0D\u4F1A\u5220\u9664\u4EFB\u4F55\u6570\u636E\uFF0C\u62D2\u7EDD\u6240\u6709\u5199\u5165\u64CD\u4F5C\u5E76\u8FD4 \u56DE\u5BA2\u6237\u7AEF\u9519\u8BEF\u4FE1\u606F\uFF0C\u6B64 \u65F6Redis\u53EA\u54CD\u5E94\u8BFB\u64CD\u4F5C\u3002</li><li>volatile-lru\uFF1A\u6839\u636ELRU\u7B97\u6CD5\u5220\u9664\u8BBE\u7F6E\u4E86\u8D85\u65F6\u5C5E\u6027\uFF08expire\uFF09\u7684\u952E\uFF0C\u76F4 \u5230\u817E\u51FA\u8DB3\u591F\u7A7A\u95F4\u4E3A\u6B62\u3002\u5982\u679C\u6CA1\u6709\u53EF\u5220\u9664\u7684\u952E\u5BF9\u8C61\uFF0C\u56DE\u9000\u5230noeviction\u7B56\u7565\u3002</li><li>allkeys-lru\uFF1A\u6839\u636ELRU\u7B97\u6CD5\u5220\u9664\u952E\uFF0C\u4E0D\u7BA1\u6570\u636E\u6709\u6CA1\u6709\u8BBE\u7F6E\u8D85\u65F6\u5C5E\u6027\uFF0C \u76F4\u5230\u817E\u51FA\u8DB3\u591F\u7A7A\u95F4\u4E3A\u6B62\u3002</li><li>allkeys-random\uFF1A\u968F\u673A\u5220\u9664\u6240\u6709\u952E\uFF0C\u76F4\u5230\u817E\u51FA\u8DB3\u591F\u7A7A\u95F4\u4E3A\u6B62\u3002</li><li>volatile-random\uFF1A\u968F\u673A\u5220\u9664\u8FC7\u671F\u952E\uFF0C\u76F4\u5230\u817E\u51FA\u8DB3\u591F\u7A7A\u95F4\u4E3A\u6B62\u3002</li><li>volatile-ttl\uFF1A\u6839\u636E\u952E\u503C\u5BF9\u8C61\u7684ttl\u5C5E\u6027\uFF0C\u5220\u9664\u6700\u8FD1\u5C06\u8981\u8FC7\u671F\u6570\u636E\u3002\u5982\u679C \u6CA1\u6709\uFF0C\u56DE\u9000\u5230noeviction\u7B56\u7565\u3002</li></ol><h3 id="_37-redis\u963B\u585E-\u600E\u4E48\u89E3\u51B3" tabindex="-1"><a class="header-anchor" href="#_37-redis\u963B\u585E-\u600E\u4E48\u89E3\u51B3" aria-hidden="true">#</a> 37.Redis\u963B\u585E\uFF1F\u600E\u4E48\u89E3\u51B3\uFF1F</h3><p>Redis\u53D1\u751F\u963B\u585E\uFF0C\u53EF\u4EE5\u4ECE\u4EE5\u4E0B\u51E0\u4E2A\u65B9\u9762\u6392\u67E5\uFF1A <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-e6a35258-7a78-4489-90b7-e47a4190802b.png" alt="Redis\u963B\u585E\u6392\u67E5"></p><ul><li><p><strong>API\u6216\u6570\u636E\u7ED3\u6784\u4F7F\u7528\u4E0D\u5408\u7406</strong></p><p>\u901A\u5E38Redis\u6267\u884C\u547D\u4EE4\u901F\u5EA6\u975E\u5E38\u5FEB\uFF0C\u4F46\u662F\u4E0D\u5408\u7406\u5730\u4F7F\u7528\u547D\u4EE4\uFF0C\u53EF\u80FD\u4F1A\u5BFC\u81F4\u6267\u884C\u901F\u5EA6\u5F88\u6162\uFF0C\u5BFC\u81F4\u963B\u585E\uFF0C\u5BF9\u4E8E\u9AD8\u5E76\u53D1\u7684\u573A\u666F\uFF0C\u5E94\u8BE5\u5C3D\u91CF\u907F\u514D\u5728\u5927\u5BF9\u8C61\u4E0A\u6267\u884C\u7B97\u6CD5\u590D\u6742 \u5EA6\u8D85\u8FC7O\uFF08n\uFF09\u7684\u547D\u4EE4\u3002</p><p>\u5BF9\u6162\u67E5\u8BE2\u7684\u5904\u7406\u5206\u4E3A\u4E24\u6B65\uFF1A</p><ol><li>\u53D1\u73B0\u6162\u67E5\u8BE2\uFF1A slowlog get{n}\u547D\u4EE4\u53EF\u4EE5\u83B7\u53D6\u6700\u8FD1 \u7684n\u6761\u6162\u67E5\u8BE2\u547D\u4EE4\uFF1B</li><li>\u53D1\u73B0\u6162\u67E5\u8BE2\u540E\uFF0C\u53EF\u4EE5\u4ECE\u4E24\u4E2A\u65B9\u5411\u53BB\u4F18\u5316\u6162\u67E5\u8BE2\uFF1A 1\uFF09\u4FEE\u6539\u4E3A\u4F4E\u7B97\u6CD5\u590D\u6742\u5EA6\u7684\u547D\u4EE4\uFF0C\u5982hgetall\u6539\u4E3Ahmget\u7B49\uFF0C\u7981\u7528keys\u3001sort\u7B49\u547D \u4EE4 2\uFF09\u8C03\u6574\u5927\u5BF9\u8C61\uFF1A\u7F29\u51CF\u5927\u5BF9\u8C61\u6570\u636E\u6216\u628A\u5927\u5BF9\u8C61\u62C6\u5206\u4E3A\u591A\u4E2A\u5C0F\u5BF9\u8C61\uFF0C\u9632\u6B62\u4E00\u6B21\u547D\u4EE4\u64CD\u4F5C\u8FC7\u591A\u7684\u6570\u636E\u3002</li></ol></li><li><p><strong>CPU\u9971\u548C\u7684\u95EE\u9898</strong></p><p>\u5355\u7EBF\u7A0B\u7684Redis\u5904\u7406\u547D\u4EE4\u65F6\u53EA\u80FD\u4F7F\u7528\u4E00\u4E2ACPU\u3002\u800CCPU\u9971\u548C\u662F\u6307Redis\u5355\u6838CPU\u4F7F\u7528\u7387\u8DD1\u5230\u63A5\u8FD1100%\u3002</p><p>\u9488\u5BF9\u8FD9\u79CD\u60C5\u51B5\uFF0C\u5904\u7406\u6B65\u9AA4\u4E00\u822C\u5982\u4E0B\uFF1A</p><ol><li>\u5224\u65AD\u5F53\u524DRedis\u5E76\u53D1\u91CF\u662F\u5426\u5DF2\u7ECF\u8FBE\u5230\u6781\u9650\uFF0C\u53EF\u4EE5\u4F7F\u7528\u7EDF\u8BA1\u547D\u4EE4redis-cli-h{ip}-p{port}--stat\u83B7\u53D6\u5F53\u524D Redis\u4F7F\u7528\u60C5\u51B5</li><li>\u5982\u679CRedis\u7684\u8BF7\u6C42\u51E0\u4E07+\uFF0C\u90A3\u4E48\u5927\u6982\u5C31\u662FRedis\u7684OPS\u5DF2\u7ECF\u5230\u4E86\u6781\u9650\uFF0C\u5E94\u8BE5\u505A\u96C6\u7FA4\u5316\u6C34\u54C1\u6269\u5C55\u6765\u5206\u644AOPS\u538B\u529B</li><li>\u5982\u679C\u53EA\u6709\u51E0\u767E\u51E0\u5343\uFF0C\u90A3\u4E48\u5C31\u5F97\u6392\u67E5\u547D\u4EE4\u548C\u5185\u5B58\u7684\u4F7F\u7528</li></ol></li><li><p><strong>\u6301\u4E45\u5316\u76F8\u5173\u7684\u963B\u585E</strong></p><p>\u5BF9\u4E8E\u5F00\u542F\u4E86\u6301\u4E45\u5316\u529F\u80FD\u7684Redis\u8282\u70B9\uFF0C\u9700\u8981\u6392\u67E5\u662F\u5426\u662F\u6301\u4E45\u5316\u5BFC\u81F4\u7684\u963B\u585E\u3002</p><ol><li>fork\u963B\u585E fork\u64CD\u4F5C\u53D1\u751F\u5728RDB\u548CAOF\u91CD\u5199\u65F6\uFF0CRedis\u4E3B\u7EBF\u7A0B\u8C03\u7528fork\u64CD\u4F5C\u4EA7\u751F\u5171\u4EAB \u5185\u5B58\u7684\u5B50\u8FDB\u7A0B\uFF0C\u7531\u5B50\u8FDB\u7A0B\u5B8C\u6210\u6301\u4E45\u5316\u6587\u4EF6\u91CD\u5199\u5DE5\u4F5C\u3002\u5982\u679Cfork\u64CD\u4F5C\u672C\u8EAB\u8017\u65F6\u8FC7\u957F\uFF0C\u5FC5\u7136\u4F1A\u5BFC\u81F4\u4E3B\u7EBF\u7A0B\u7684\u963B\u585E\u3002</li><li>AOF\u5237\u76D8\u963B\u585E \u5F53\u6211\u4EEC\u5F00\u542FAOF\u6301\u4E45\u5316\u529F\u80FD\u65F6\uFF0C\u6587\u4EF6\u5237\u76D8\u7684\u65B9\u5F0F\u4E00\u822C\u91C7\u7528\u6BCF\u79D2\u4E00\u6B21\uFF0C\u540E\u53F0\u7EBF\u7A0B\u6BCF\u79D2\u5BF9AOF\u6587\u4EF6\u505Afsync\u64CD\u4F5C\u3002\u5F53\u786C\u76D8\u538B\u529B\u8FC7\u5927\u65F6\uFF0Cfsync\u64CD\u4F5C\u9700\u8981\u7B49 \u5F85\uFF0C\u76F4\u5230\u5199\u5165\u5B8C\u6210\u3002\u5982\u679C\u4E3B\u7EBF\u7A0B\u53D1\u73B0\u8DDD\u79BB\u4E0A\u4E00\u6B21\u7684fsync\u6210\u529F\u8D85\u8FC72\u79D2\uFF0C\u4E3A\u4E86 \u6570\u636E\u5B89\u5168\u6027\u5B83\u4F1A\u963B\u585E\u76F4\u5230\u540E\u53F0\u7EBF\u7A0B\u6267\u884Cfsync\u64CD\u4F5C\u5B8C\u6210\u3002</li><li>HugePage\u5199\u64CD\u4F5C\u963B\u585E \u5BF9\u4E8E\u5F00\u542FTransparent HugePages\u7684 \u64CD\u4F5C\u7CFB\u7EDF\uFF0C\u6BCF\u6B21\u5199\u547D\u4EE4\u5F15\u8D77\u7684\u590D\u5236\u5185\u5B58\u9875\u5355\u4F4D\u75314K\u53D8\u4E3A2MB\uFF0C\u653E\u5927\u4E86512 \u500D\uFF0C\u4F1A\u62D6\u6162\u5199\u64CD\u4F5C\u7684\u6267\u884C\u65F6\u95F4\uFF0C\u5BFC\u81F4\u5927\u91CF\u5199\u64CD\u4F5C\u6162\u67E5\u8BE2\u3002</li></ol></li></ul><h3 id="_38-\u5927key\u95EE\u9898\u4E86\u89E3\u5417" tabindex="-1"><a class="header-anchor" href="#_38-\u5927key\u95EE\u9898\u4E86\u89E3\u5417" aria-hidden="true">#</a> 38.\u5927key\u95EE\u9898\u4E86\u89E3\u5417\uFF1F</h3><p>Redis\u4F7F\u7528\u8FC7\u7A0B\u4E2D\uFF0C\u6709\u65F6\u5019\u4F1A\u51FA\u73B0\u5927key\u7684\u60C5\u51B5\uFF0C \u6BD4\u5982\uFF1A</p><ul><li>\u5355\u4E2A\u7B80\u5355\u7684key\u5B58\u50A8\u7684value\u5F88\u5927\uFF0Csize\u8D85\u8FC710KB</li><li>hash\uFF0C set\uFF0Czset\uFF0Clist \u4E2D\u5B58\u50A8\u8FC7\u591A\u7684\u5143\u7D20\uFF08\u4EE5\u4E07\u4E3A\u5355\u4F4D\uFF09</li></ul><blockquote><p><strong>\u5927key\u4F1A\u9020\u6210\u4EC0\u4E48\u95EE\u9898\u5462\uFF1F</strong></p></blockquote><ul><li>\u5BA2\u6237\u7AEF\u8017\u65F6\u589E\u52A0\uFF0C\u751A\u81F3\u8D85\u65F6</li><li>\u5BF9\u5927key\u8FDB\u884CIO\u64CD\u4F5C\u65F6\uFF0C\u4F1A\u4E25\u91CD\u5360\u7528\u5E26\u5BBD\u548CCPU</li><li>\u9020\u6210Redis\u96C6\u7FA4\u4E2D\u6570\u636E\u503E\u659C</li><li>\u4E3B\u52A8\u5220\u9664\u3001\u88AB\u52A8\u5220\u7B49\uFF0C\u53EF\u80FD\u4F1A\u5BFC\u81F4\u963B\u585E</li></ul><blockquote><p><strong>\u5982\u4F55\u627E\u5230\u5927key?</strong></p></blockquote><ul><li>bigkeys\u547D\u4EE4\uFF1A\u4F7F\u7528bigkeys\u547D\u4EE4\u4EE5\u904D\u5386\u7684\u65B9\u5F0F\u5206\u6790Redis\u5B9E\u4F8B\u4E2D\u7684\u6240\u6709Key\uFF0C\u5E76\u8FD4\u56DE\u6574\u4F53\u7EDF\u8BA1\u4FE1\u606F\u4E0E\u6BCF\u4E2A\u6570\u636E\u7C7B\u578B\u4E2DTop1\u7684\u5927Key</li><li>redis-rdb-tools\uFF1Aredis-rdb-tools\u662F\u7531Python\u5199\u7684\u7528\u6765\u5206\u6790Redis\u7684rdb\u5FEB\u7167\u6587\u4EF6\u7528\u7684\u5DE5\u5177\uFF0C\u5B83\u53EF\u4EE5\u628Ardb\u5FEB\u7167\u6587\u4EF6\u751F\u6210json\u6587\u4EF6\u6216\u8005\u751F\u6210\u62A5\u8868\u7528\u6765\u5206\u6790Redis\u7684\u4F7F\u7528\u8BE6\u60C5\u3002</li></ul><blockquote><p><strong>\u5982\u4F55\u5904\u7406\u5927key?</strong></p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-e4aaafda-fce1-47f0-8b2b-7261d47b720b.png" alt="\u5927key\u5904\u7406"></p><ul><li><p><strong>\u5220\u9664\u5927key</strong></p><ul><li>\u5F53Redis\u7248\u672C\u5927\u4E8E4.0\u65F6\uFF0C\u53EF\u4F7F\u7528UNLINK\u547D\u4EE4\u5B89\u5168\u5730\u5220\u9664\u5927Key\uFF0C\u8BE5\u547D\u4EE4\u80FD\u591F\u4EE5\u975E\u963B\u585E\u7684\u65B9\u5F0F\uFF0C\u9010\u6B65\u5730\u6E05\u7406\u4F20\u5165\u7684Key\u3002</li><li>\u5F53Redis\u7248\u672C\u5C0F\u4E8E4.0\u65F6\uFF0C\u907F\u514D\u4F7F\u7528\u963B\u585E\u5F0F\u547D\u4EE4KEYS\uFF0C\u800C\u662F\u5EFA\u8BAE\u901A\u8FC7SCAN\u547D\u4EE4\u6267\u884C\u589E\u91CF\u8FED\u4EE3\u626B\u63CFkey\uFF0C\u7136\u540E\u5224\u65AD\u8FDB\u884C\u5220\u9664\u3002</li></ul></li><li><p><strong>\u538B\u7F29\u548C\u62C6\u5206key</strong></p><ul><li>\u5F53vaule\u662Fstring\u65F6\uFF0C\u6BD4\u8F83\u96BE\u62C6\u5206\uFF0C\u5219\u4F7F\u7528\u5E8F\u5217\u5316\u3001\u538B\u7F29\u7B97\u6CD5\u5C06key\u7684\u5927\u5C0F\u63A7\u5236\u5728\u5408\u7406\u8303\u56F4\u5185\uFF0C\u4F46\u662F\u5E8F\u5217\u5316\u548C\u53CD\u5E8F\u5217\u5316\u90FD\u4F1A\u5E26\u6765\u66F4\u591A\u65F6\u95F4\u4E0A\u7684\u6D88\u8017\u3002</li><li>\u5F53value\u662Fstring\uFF0C\u538B\u7F29\u4E4B\u540E\u4ECD\u7136\u662F\u5927key\uFF0C\u5219\u9700\u8981\u8FDB\u884C\u62C6\u5206\uFF0C\u4E00\u4E2A\u5927key\u5206\u4E3A\u4E0D\u540C\u7684\u90E8\u5206\uFF0C\u8BB0\u5F55\u6BCF\u4E2A\u90E8\u5206\u7684key\uFF0C\u4F7F\u7528multiget\u7B49\u64CD\u4F5C\u5B9E\u73B0\u4E8B\u52A1\u8BFB\u53D6\u3002</li><li>\u5F53value\u662Flist/set\u7B49\u96C6\u5408\u7C7B\u578B\u65F6\uFF0C\u6839\u636E\u9884\u4F30\u7684\u6570\u636E\u89C4\u6A21\u6765\u8FDB\u884C\u5206\u7247\uFF0C\u4E0D\u540C\u7684\u5143\u7D20\u8BA1\u7B97\u540E\u5206\u5230\u4E0D\u540C\u7684\u7247\u3002</li></ul></li></ul><h3 id="_39-redis\u5E38\u89C1\u6027\u80FD\u95EE\u9898\u548C\u89E3\u51B3\u65B9\u6848" tabindex="-1"><a class="header-anchor" href="#_39-redis\u5E38\u89C1\u6027\u80FD\u95EE\u9898\u548C\u89E3\u51B3\u65B9\u6848" aria-hidden="true">#</a> 39.Redis\u5E38\u89C1\u6027\u80FD\u95EE\u9898\u548C\u89E3\u51B3\u65B9\u6848\uFF1F</h3><ol><li>Master \u6700\u597D\u4E0D\u8981\u505A\u4EFB\u4F55\u6301\u4E45\u5316\u5DE5\u4F5C\uFF0C\u5305\u62EC\u5185\u5B58\u5FEB\u7167\u548C AOF \u65E5\u5FD7\u6587\u4EF6\uFF0C\u7279\u522B\u662F\u4E0D\u8981\u542F\u7528\u5185\u5B58\u5FEB\u7167\u505A\u6301\u4E45\u5316\u3002</li><li>\u5982\u679C\u6570\u636E\u6BD4\u8F83\u5173\u952E\uFF0C\u67D0\u4E2A Slave \u5F00\u542F AOF \u5907\u4EFD\u6570\u636E\uFF0C\u7B56\u7565\u4E3A\u6BCF\u79D2\u540C\u6B65\u4E00\u6B21\u3002</li><li>\u4E3A\u4E86\u4E3B\u4ECE\u590D\u5236\u7684\u901F\u5EA6\u548C\u8FDE\u63A5\u7684\u7A33\u5B9A\u6027\uFF0CSlave \u548C Master \u6700\u597D\u5728\u540C\u4E00\u4E2A\u5C40\u57DF\u7F51\u5185\u3002</li><li>\u5C3D\u91CF\u907F\u514D\u5728\u538B\u529B\u8F83\u5927\u7684\u4E3B\u5E93\u4E0A\u589E\u52A0\u4ECE\u5E93\u3002</li><li>Master \u8C03\u7528 BGREWRITEAOF \u91CD\u5199 AOF \u6587\u4EF6\uFF0CAOF \u5728\u91CD\u5199\u7684\u65F6\u5019\u4F1A\u5360\u5927\u91CF\u7684 CPU \u548C\u5185\u5B58\u8D44\u6E90\uFF0C\u5BFC\u81F4\u670D\u52A1 load \u8FC7\u9AD8\uFF0C\u51FA\u73B0\u77ED\u6682\u670D\u52A1\u6682\u505C\u73B0\u8C61\u3002</li><li>\u4E3A\u4E86 Master \u7684\u7A33\u5B9A\u6027\uFF0C\u4E3B\u4ECE\u590D\u5236\u4E0D\u8981\u7528\u56FE\u72B6\u7ED3\u6784\uFF0C\u7528\u5355\u5411\u94FE\u8868\u7ED3\u6784\u66F4\u7A33\u5B9A\uFF0C\u5373\u4E3B\u4ECE\u5173\u4E3A\uFF1AMaster&lt;\u2013Slave1&lt;\u2013Slave2&lt;\u2013Slave3\u2026\uFF0C\u8FD9\u6837\u7684\u7ED3\u6784\u4E5F\u65B9\u4FBF\u89E3\u51B3\u5355\u70B9\u6545\u969C\u95EE\u9898\uFF0C\u5B9E\u73B0 Slave \u5BF9 Master \u7684\u66FF\u6362\uFF0C\u4E5F\u5373\uFF0C\u5982\u679C Master \u6302\u4E86\uFF0C\u53EF\u4EE5\u7ACB\u9A6C\u542F\u7528 Slave1 \u505A Master\uFF0C\u5176\u4ED6\u4E0D\u53D8\u3002</li></ol><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><h2 id="redis\u5E94\u7528" tabindex="-1"><a class="header-anchor" href="#redis\u5E94\u7528" aria-hidden="true">#</a> Redis\u5E94\u7528</h2><h3 id="_40-\u4F7F\u7528redis-\u5982\u4F55\u5B9E\u73B0\u5F02\u6B65\u961F\u5217" tabindex="-1"><a class="header-anchor" href="#_40-\u4F7F\u7528redis-\u5982\u4F55\u5B9E\u73B0\u5F02\u6B65\u961F\u5217" aria-hidden="true">#</a> 40.\u4F7F\u7528Redis \u5982\u4F55\u5B9E\u73B0\u5F02\u6B65\u961F\u5217\uFF1F</h3><p>\u6211\u4EEC\u77E5\u9053redis\u652F\u6301\u5F88\u591A\u79CD\u7ED3\u6784\u7684\u6570\u636E\uFF0C\u90A3\u4E48\u5982\u4F55\u4F7F\u7528redis\u4F5C\u4E3A\u5F02\u6B65\u961F\u5217\u4F7F\u7528\u5462\uFF1F \u4E00\u822C\u6709\u4EE5\u4E0B\u51E0\u79CD\u65B9\u5F0F\uFF1A</p><ul><li><strong>\u4F7F\u7528list\u4F5C\u4E3A\u961F\u5217\uFF0Clpush\u751F\u4EA7\u6D88\u606F\uFF0Crpop\u6D88\u8D39\u6D88\u606F</strong></li></ul><p>\u8FD9\u79CD\u65B9\u5F0F\uFF0C\u6D88\u8D39\u8005\u6B7B\u5FAA\u73AFrpop\u4ECE\u961F\u5217\u4E2D\u6D88\u8D39\u6D88\u606F\u3002\u4F46\u662F\u8FD9\u6837\uFF0C\u5373\u4F7F\u961F\u5217\u91CC\u6CA1\u6709\u6D88\u606F\uFF0C\u4E5F\u4F1A\u8FDB\u884Crpop\uFF0C\u4F1A\u5BFC\u81F4Redis CPU\u7684\u6D88\u8017\u3002 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-e4b192a1-3ba7-4f4e-98de-e93f437cff7c.png" alt="list\u4F5C\u4E3A\u961F\u5217"> \u53EF\u4EE5\u901A\u8FC7\u8BA9\u6D88\u8D39\u8005\u4F11\u7720\u7684\u65B9\u5F0F\u7684\u65B9\u5F0F\u6765\u5904\u7406\uFF0C\u4F46\u662F\u8FD9\u6837\u53C8\u4F1A\u53C8\u6D88\u606F\u7684\u5EF6\u8FDF\u95EE\u9898\u3002</p><p>-<strong>\u4F7F\u7528list\u4F5C\u4E3A\u961F\u5217\uFF0Clpush\u751F\u4EA7\u6D88\u606F\uFF0Cbrpop\u6D88\u8D39\u6D88\u606F</strong></p><p>brpop\u662Frpop\u7684\u963B\u585E\u7248\u672C\uFF0Clist\u4E3A\u7A7A\u7684\u65F6\u5019\uFF0C\u5B83\u4F1A\u4E00\u76F4\u963B\u585E\uFF0C\u76F4\u5230list\u4E2D\u6709\u503C\u6216\u8005\u8D85\u65F6\u3002 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-e9581e51-ffc8-4326-9af4-07816743dc88.png" alt="list\u4F5C\u4E3A\u961F\u5217\uFF0Cbrpop"></p><p>\u8FD9\u79CD\u65B9\u5F0F\u53EA\u80FD\u5B9E\u73B0\u4E00\u5BF9\u4E00\u7684\u6D88\u606F\u961F\u5217\u3002</p><ul><li><strong>\u4F7F\u7528Redis\u7684pub/sub\u6765\u8FDB\u884C\u6D88\u606F\u7684\u53D1\u5E03/\u8BA2\u9605</strong></li></ul><p>\u53D1\u5E03/\u8BA2\u9605\u6A21\u5F0F\u53EF\u4EE51\uFF1AN\u7684\u6D88\u606F\u53D1\u5E03/\u8BA2\u9605\u3002\u53D1\u5E03\u8005\u5C06\u6D88\u606F\u53D1\u5E03\u5230\u6307\u5B9A\u7684\u9891\u9053\u9891\u9053\uFF08channel\uFF09\uFF0C\u8BA2\u9605\u76F8\u5E94\u9891\u9053\u7684\u5BA2\u6237\u7AEF\u90FD\u80FD\u6536\u5230\u6D88\u606F\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-bc6d05be-3701-4e23-b4ca-6330c949f020.png" alt="pub/sub"> \u4F46\u662F\u8FD9\u79CD\u65B9\u5F0F\u4E0D\u662F\u53EF\u9760\u7684\uFF0C\u5B83\u4E0D\u4FDD\u8BC1\u8BA2\u9605\u8005\u4E00\u5B9A\u80FD\u6536\u5230\u6D88\u606F\uFF0C\u4E5F\u4E0D\u8FDB\u884C\u6D88\u606F\u7684\u5B58\u50A8\u3002</p><p>\u6240\u4EE5\uFF0C\u4E00\u822C\u7684\u5F02\u6B65\u961F\u5217\u7684\u5B9E\u73B0\u8FD8\u662F\u4EA4\u7ED9\u4E13\u4E1A\u7684\u6D88\u606F\u961F\u5217\u3002</p><h3 id="_41-redis-\u5982\u4F55\u5B9E\u73B0\u5EF6\u65F6\u961F\u5217" tabindex="-1"><a class="header-anchor" href="#_41-redis-\u5982\u4F55\u5B9E\u73B0\u5EF6\u65F6\u961F\u5217" aria-hidden="true">#</a> 41.Redis \u5982\u4F55\u5B9E\u73B0\u5EF6\u65F6\u961F\u5217?</h3><ul><li><strong>\u4F7F\u7528zset\uFF0C\u5229\u7528\u6392\u5E8F\u5B9E\u73B0</strong></li></ul><p>\u53EF\u4EE5\u4F7F\u7528 zset\u8FD9\u4E2A\u7ED3\u6784\uFF0C\u7528\u8BBE\u7F6E\u597D\u7684\u65F6\u95F4\u6233\u4F5C\u4E3Ascore\u8FDB\u884C\u6392\u5E8F\uFF0C\u4F7F\u7528 zadd score1 value1 ....\u547D\u4EE4\u5C31\u53EF\u4EE5\u4E00\u76F4\u5F80\u5185\u5B58\u4E2D\u751F\u4EA7\u6D88\u606F\u3002\u518D\u5229\u7528 zrangebysocre \u67E5\u8BE2\u7B26\u5408\u6761\u4EF6\u7684\u6240\u6709\u5F85\u5904\u7406\u7684\u4EFB\u52A1\uFF0C\u901A\u8FC7\u5FAA\u73AF\u6267\u884C\u961F\u5217\u4EFB\u52A1\u5373\u53EF\u3002 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-54bbcc36-0b00-4142-a6eb-bf2ef48c2213.png" alt="zset\u5B9E\u73B0\u5EF6\u65F6\u961F\u5217"></p><h3 id="_42-redis-\u652F\u6301\u4E8B\u52A1\u5417" tabindex="-1"><a class="header-anchor" href="#_42-redis-\u652F\u6301\u4E8B\u52A1\u5417" aria-hidden="true">#</a> 42.Redis \u652F\u6301\u4E8B\u52A1\u5417\uFF1F</h3><p>Redis\u63D0\u4F9B\u4E86\u7B80\u5355\u7684\u4E8B\u52A1\uFF0C\u4F46\u5B83\u5BF9\u4E8B\u52A1ACID\u7684\u652F\u6301\u5E76\u4E0D\u5B8C\u5907\u3002</p><p>multi\u547D\u4EE4\u4EE3\u8868\u4E8B\u52A1\u5F00\u59CB\uFF0Cexec\u547D\u4EE4\u4EE3\u8868\u4E8B\u52A1\u7ED3\u675F\uFF0C\u5B83\u4EEC\u4E4B\u95F4\u7684\u547D\u4EE4\u662F\u539F\u5B50\u987A\u5E8F\u6267\u884C\u7684\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token number">127.0</span><span class="token number">.0</span><span class="token number">.1</span><span class="token operator">:</span><span class="token number">6379</span><span class="token operator">&gt;</span> multi 
+import{_ as t}from"./plugin-vue_export-helper.21dcd24c.js";import{r as i,o as r,c as o,a,b as n,d as e,e as p}from"./app.615e41d8.js";const l={},d=a("h1",{id:"\u9762\u6E23\u9006\u88AD-redis-\u5FC5\u770B",tabindex:"-1"},[a("a",{class:"header-anchor",href:"#\u9762\u6E23\u9006\u88AD-redis-\u5FC5\u770B","aria-hidden":"true"},"#"),e(" \u9762\u6E23\u9006\u88AD\uFF08Redis\uFF09\u5FC5\u770B\u{1F44D}")],-1),c=e("\u56FE\u6587\u8BE6\u89E3 53 \u9053Redis\u9762\u8BD5\u9AD8\u9891\u9898\uFF0C\u8FD9\u6B21\u540A\u6253\u9762\u8BD5\u5B98\uFF0C\u6211\u89C9\u5F97\u7A33\u4E86\uFF08\u624B\u52A8 dog\uFF09\u3002\u6574\u7406\uFF1A\u6C89\u9ED8\u738B\u4E8C\uFF0C\u6233"),b={href:"https://mp.weixin.qq.com/s/19u34NXALB1nOlBCE6Eg-Q",target:"_blank",rel:"noopener noreferrer"},g=e("\u8F6C\u8F7D\u94FE\u63A5"),h=e("\uFF0C\u4F5C\u8005\uFF1A\u4E09\u5206\u6076\uFF0C\u6233"),u={href:"https://mp.weixin.qq.com/s/iJtNJYgirRugNBnzxkbB4Q",target:"_blank",rel:"noopener noreferrer"},m=e("\u539F\u6587\u94FE\u63A5"),k=e("\u3002"),f=p(`<h2 id="\u57FA\u7840" tabindex="-1"><a class="header-anchor" href="#\u57FA\u7840" aria-hidden="true">#</a> \u57FA\u7840</h2><h3 id="_1-\u8BF4\u8BF4\u4EC0\u4E48\u662Fredis" tabindex="-1"><a class="header-anchor" href="#_1-\u8BF4\u8BF4\u4EC0\u4E48\u662Fredis" aria-hidden="true">#</a> 1.\u8BF4\u8BF4\u4EC0\u4E48\u662FRedis?</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-96e079f9-49a3-4c55-b0a4-47d043732b62.png" alt="Redis\u56FE\u6807"></p><p>Redis\u662F\u4E00\u79CD\u57FA\u4E8E\u952E\u503C\u5BF9\uFF08key-value\uFF09\u7684NoSQL\u6570\u636E\u5E93\u3002</p><p>\u6BD4\u4E00\u822C\u952E\u503C\u5BF9\u6570\u636E\u5E93\u5F3A\u5927\u7684\u5730\u65B9\uFF0CRedis\u4E2D\u7684value\u652F\u6301string\uFF08\u5B57\u7B26\u4E32\uFF09\u3001hash\uFF08\u54C8\u5E0C\uFF09\u3001 list\uFF08\u5217\u8868\uFF09\u3001set\uFF08\u96C6\u5408\uFF09\u3001zset\uFF08\u6709\u5E8F\u96C6\u5408\uFF09\u3001Bitmaps\uFF08\u4F4D\u56FE\uFF09\u3001 HyperLogLog\u3001GEO\uFF08\u5730\u7406\u4FE1\u606F\u5B9A\u4F4D\uFF09\u7B49\u591A\u79CD\u6570\u636E\u7ED3\u6784\uFF0C\u56E0\u6B64 Redis\u53EF\u4EE5\u6EE1\u8DB3\u5F88\u591A\u7684\u5E94\u7528\u573A\u666F\u3002</p><p>\u800C\u4E14\u56E0\u4E3ARedis\u4F1A\u5C06\u6240\u6709\u6570\u636E\u90FD\u5B58\u653E\u5728\u5185\u5B58\u4E2D\uFF0C\u6240\u4EE5\u5B83\u7684\u8BFB\u5199\u6027\u80FD\u975E\u5E38\u51FA\u8272\u3002</p><p>\u4E0D\u4EC5\u5982\u6B64\uFF0CRedis\u8FD8\u53EF\u4EE5\u5C06\u5185\u5B58\u7684\u6570\u636E\u5229\u7528\u5FEB\u7167\u548C\u65E5\u5FD7\u7684\u5F62\u5F0F\u4FDD\u5B58\u5230\u786C\u76D8\u4E0A\uFF0C\u8FD9\u6837\u5728\u53D1\u751F\u7C7B\u4F3C\u65AD\u7535\u6216\u8005\u673A\u5668\u6545\u969C\u7684\u65F6\u5019\uFF0C\u5185\u5B58\u4E2D\u7684\u6570\u636E\u4E0D\u4F1A\u201C\u4E22\u5931\u201D\u3002</p><p>\u9664\u4E86\u4E0A\u8FF0\u529F\u80FD\u4EE5\u5916\uFF0CRedis\u8FD8\u63D0\u4F9B\u4E86\u952E\u8FC7\u671F\u3001\u53D1\u5E03\u8BA2\u9605\u3001\u4E8B\u52A1\u3001\u6D41\u6C34\u7EBF\u3001Lua\u811A\u672C\u7B49\u9644\u52A0\u529F\u80FD\u3002</p><p>\u603B\u4E4B\uFF0CRedis\u662F\u4E00\u6B3E\u5F3A\u5927\u7684\u6027\u80FD\u5229\u5668\u3002</p><h3 id="_2-redis\u53EF\u4EE5\u7528\u6765\u5E72\u4EC0\u4E48" tabindex="-1"><a class="header-anchor" href="#_2-redis\u53EF\u4EE5\u7528\u6765\u5E72\u4EC0\u4E48" aria-hidden="true">#</a> 2.Redis\u53EF\u4EE5\u7528\u6765\u5E72\u4EC0\u4E48\uFF1F</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-b02e44b3-3299-450f-b767-4a862b5ac8ff.png" alt="Redis"></p><ol><li><p>\u7F13\u5B58</p><p>\u8FD9\u662FRedis\u5E94\u7528\u6700\u5E7F\u6CDB\u5730\u65B9\uFF0C\u57FA\u672C\u6240\u6709\u7684Web\u5E94\u7528\u90FD\u4F1A\u4F7F\u7528Redis\u4F5C\u4E3A\u7F13\u5B58\uFF0C\u6765\u964D\u4F4E\u6570\u636E\u6E90\u538B\u529B\uFF0C\u63D0\u9AD8\u54CD\u5E94\u901F\u5EA6\u3002 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-d44c2397-5994-452f-8b7b-eb85d2b87685.png" alt="Redis\u7F13\u5B58"></p></li><li><p>\u8BA1\u6570\u5668 Redis\u5929\u7136\u652F\u6301\u8BA1\u6570\u529F\u80FD\uFF0C\u800C\u4E14\u8BA1\u6570\u6027\u80FD\u975E\u5E38\u597D\uFF0C\u53EF\u4EE5\u7528\u6765\u8BB0\u5F55\u6D4F\u89C8\u91CF\u3001\u70B9\u8D5E\u91CF\u7B49\u7B49\u3002</p></li><li><p>\u6392\u884C\u699C Redis\u63D0\u4F9B\u4E86\u5217\u8868\u548C\u6709\u5E8F\u96C6\u5408\u6570\u636E\u7ED3\u6784\uFF0C\u5408\u7406\u5730\u4F7F\u7528\u8FD9\u4E9B\u6570\u636E\u7ED3\u6784\u53EF\u4EE5\u5F88\u65B9\u4FBF\u5730\u6784\u5EFA\u5404\u79CD\u6392\u884C\u699C\u7CFB\u7EDF\u3002</p></li><li><p>\u793E\u4EA4\u7F51\u7EDC \u8D5E/\u8E29\u3001\u7C89\u4E1D\u3001\u5171\u540C\u597D\u53CB/\u559C\u597D\u3001\u63A8\u9001\u3001\u4E0B\u62C9\u5237\u65B0\u3002</p></li><li><p>\u6D88\u606F\u961F\u5217 Redis\u63D0\u4F9B\u4E86\u53D1\u5E03\u8BA2\u9605\u529F\u80FD\u548C\u963B\u585E\u961F\u5217\u7684\u529F\u80FD\uFF0C\u53EF\u4EE5\u6EE1\u8DB3\u4E00\u822C\u6D88\u606F\u961F\u5217\u529F\u80FD\u3002</p></li><li><p>\u5206\u5E03\u5F0F\u9501 \u5206\u5E03\u5F0F\u73AF\u5883\u4E0B\uFF0C\u5229\u7528Redis\u5B9E\u73B0\u5206\u5E03\u5F0F\u9501\uFF0C\u4E5F\u662FRedis\u5E38\u89C1\u7684\u5E94\u7528\u3002</p></li></ol><p>Redis\u7684\u5E94\u7528\u4E00\u822C\u4F1A\u7ED3\u5408\u9879\u76EE\u53BB\u95EE\uFF0C\u4EE5\u4E00\u4E2A\u7535\u5546\u9879\u76EE\u7684\u7528\u6237\u670D\u52A1\u4E3A\u4F8B\uFF1A</p><ul><li>Token\u5B58\u50A8\uFF1A\u7528\u6237\u767B\u5F55\u6210\u529F\u4E4B\u540E\uFF0C\u4F7F\u7528Redis\u5B58\u50A8Token</li><li>\u767B\u5F55\u5931\u8D25\u6B21\u6570\u8BA1\u6570\uFF1A\u4F7F\u7528Redis\u8BA1\u6570\uFF0C\u767B\u5F55\u5931\u8D25\u8D85\u8FC7\u4E00\u5B9A\u6B21\u6570\uFF0C\u9501\u5B9A\u8D26\u53F7</li><li>\u5730\u5740\u7F13\u5B58\uFF1A\u5BF9\u7701\u5E02\u533A\u6570\u636E\u7684\u7F13\u5B58</li><li>\u5206\u5E03\u5F0F\u9501\uFF1A\u5206\u5E03\u5F0F\u73AF\u5883\u4E0B\u767B\u5F55\u3001\u6CE8\u518C\u7B49\u64CD\u4F5C\u52A0\u5206\u5E03\u5F0F\u9501</li><li>\u2026\u2026</li></ul><h3 id="_3-redis-\u6709\u54EA\u4E9B\u6570\u636E\u7ED3\u6784" tabindex="-1"><a class="header-anchor" href="#_3-redis-\u6709\u54EA\u4E9B\u6570\u636E\u7ED3\u6784" aria-hidden="true">#</a> 3.Redis \u6709\u54EA\u4E9B\u6570\u636E\u7ED3\u6784\uFF1F</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-10434dc7-c7a3-4c1a-b484-de3fb37669ee.png" alt="Redis\u57FA\u672C\u6570\u636E\u7ED3\u6784"> Redis\u6709\u4E94\u79CD\u57FA\u672C\u6570\u636E\u7ED3\u6784\u3002</p><p><strong>string</strong></p><p>\u5B57\u7B26\u4E32\u6700\u57FA\u7840\u7684\u6570\u636E\u7ED3\u6784\u3002\u5B57\u7B26\u4E32\u7C7B\u578B\u7684\u503C\u5B9E\u9645\u53EF\u4EE5\u662F\u5B57\u7B26\u4E32\uFF08\u7B80\u5355\u7684\u5B57\u7B26\u4E32\u3001\u590D\u6742\u7684\u5B57\u7B26\u4E32\uFF08\u4F8B\u5982JSON\u3001XML\uFF09\uFF09\u3001\u6570\u5B57 \uFF08\u6574\u6570\u3001\u6D6E\u70B9\u6570\uFF09\uFF0C\u751A\u81F3\u662F\u4E8C\u8FDB\u5236\uFF08\u56FE\u7247\u3001\u97F3\u9891\u3001\u89C6\u9891\uFF09\uFF0C\u4F46\u662F\u503C\u6700\u5927\u4E0D\u80FD\u8D85\u8FC7512MB\u3002</p><p>\u5B57\u7B26\u4E32\u4E3B\u8981\u6709\u4EE5\u4E0B\u51E0\u4E2A\u5178\u578B\u4F7F\u7528\u573A\u666F\uFF1A</p><ul><li>\u7F13\u5B58\u529F\u80FD</li><li>\u8BA1\u6570</li><li>\u5171\u4EABSession</li><li>\u9650\u901F</li></ul><p><strong>hash</strong></p><p>\u54C8\u5E0C\u7C7B\u578B\u662F\u6307\u952E\u503C\u672C\u8EAB\u53C8\u662F\u4E00\u4E2A\u952E\u503C\u5BF9\u7ED3\u6784\u3002</p><p>\u54C8\u5E0C\u4E3B\u8981\u6709\u4EE5\u4E0B\u5178\u578B\u5E94\u7528\u573A\u666F\uFF1A</p><ul><li>\u7F13\u5B58\u7528\u6237\u4FE1\u606F</li><li>\u7F13\u5B58\u5BF9\u8C61</li></ul><p><strong>list</strong></p><p>\u5217\u8868\uFF08list\uFF09\u7C7B\u578B\u662F\u7528\u6765\u5B58\u50A8\u591A\u4E2A\u6709\u5E8F\u7684\u5B57\u7B26\u4E32\u3002\u5217\u8868\u662F\u4E00\u79CD\u6BD4\u8F83\u7075\u6D3B\u7684\u6570\u636E\u7ED3\u6784\uFF0C\u5B83\u53EF\u4EE5\u5145\u5F53\u6808\u548C\u961F\u5217\u7684\u89D2\u8272</p><p>\u5217\u8868\u4E3B\u8981\u6709\u4EE5\u4E0B\u51E0\u79CD\u4F7F\u7528\u573A\u666F\uFF1A</p><ul><li>\u6D88\u606F\u961F\u5217</li><li>\u6587\u7AE0\u5217\u8868</li></ul><p><strong>set</strong></p><p>\u96C6\u5408\uFF08set\uFF09\u7C7B\u578B\u4E5F\u662F\u7528\u6765\u4FDD\u5B58\u591A\u4E2A\u7684\u5B57\u7B26\u4E32\u5143\u7D20\uFF0C\u4F46\u548C\u5217\u8868\u7C7B\u578B\u4E0D\u4E00 \u6837\u7684\u662F\uFF0C\u96C6\u5408\u4E2D\u4E0D\u5141\u8BB8\u6709\u91CD\u590D\u5143\u7D20\uFF0C\u5E76\u4E14\u96C6\u5408\u4E2D\u7684\u5143\u7D20\u662F\u65E0\u5E8F\u7684\u3002</p><p>\u96C6\u5408\u4E3B\u8981\u6709\u5982\u4E0B\u4F7F\u7528\u573A\u666F\uFF1A</p><ul><li>\u6807\u7B7E\uFF08tag\uFF09</li><li>\u5171\u540C\u5173\u6CE8</li></ul><p><strong>sorted set</strong></p><p>\u6709\u5E8F\u96C6\u5408\u4E2D\u7684\u5143\u7D20\u53EF\u4EE5\u6392\u5E8F\u3002\u4F46\u662F\u5B83\u548C\u5217\u8868\u4F7F\u7528\u7D22\u5F15\u4E0B\u6807\u4F5C\u4E3A\u6392\u5E8F\u4F9D\u636E\u4E0D\u540C\u7684\u662F\uFF0C\u5B83\u7ED9\u6BCF\u4E2A\u5143\u7D20\u8BBE\u7F6E\u4E00\u4E2A\u6743\u91CD\uFF08score\uFF09\u4F5C\u4E3A\u6392\u5E8F\u7684\u4F9D\u636E\u3002</p><p>\u6709\u5E8F\u96C6\u5408\u4E3B\u8981\u5E94\u7528\u573A\u666F\uFF1A</p><ul><li>\u7528\u6237\u70B9\u8D5E\u7EDF\u8BA1</li><li>\u7528\u6237\u6392\u5E8F</li></ul><h3 id="_4-redis\u4E3A\u4EC0\u4E48\u5FEB\u5462" tabindex="-1"><a class="header-anchor" href="#_4-redis\u4E3A\u4EC0\u4E48\u5FEB\u5462" aria-hidden="true">#</a> 4.Redis\u4E3A\u4EC0\u4E48\u5FEB\u5462\uFF1F</h3><p>Redis\u7684\u901F\u5EA6\u2FAE\u5E38\u7684\u5FEB\uFF0C\u5355\u673A\u7684Redis\u5C31\u53EF\u4EE5\u2F40\u6491\u6BCF\u79D2\u5341\u51E0\u4E07\u7684\u5E76\u53D1\uFF0C\u76F8\u5BF9\u4E8EMySQL\u6765\u8BF4\uFF0C\u6027\u80FD\u662FMySQL\u7684\u2F0F\u2F17\u500D\u3002\u901F\u5EA6\u5FEB\u7684\u539F\u56E0\u4E3B\u8981\u6709\u2F0F\u70B9\uFF1A</p><ol><li><strong>\u5B8C\u5168\u57FA\u4E8E\u5185\u5B58\u64CD\u4F5C</strong></li><li>\u4F7F\u2F64\u5355\u7EBF\u7A0B\uFF0C\u907F\u514D\u4E86\u7EBF\u7A0B\u5207\u6362\u548C\u7ADE\u6001\u4EA7\u751F\u7684\u6D88\u8017</li><li>\u57FA\u4E8E\u2FAE\u963B\u585E\u7684IO\u591A\u8DEF\u590D\u2F64\u673A\u5236</li><li>C\u8BED\u2F94\u5B9E\u73B0\uFF0C\u4F18\u5316\u8FC7\u7684\u6570\u636E\u7ED3\u6784\uFF0C\u57FA\u4E8E\u2F0F\u79CD\u57FA\u7840\u7684\u6570\u636E\u7ED3\u6784\uFF0Credis\u505A\u4E86\u2F24\u91CF\u7684\u4F18\u5316\uFF0C\u6027\u80FD\u6781\u2FBC <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-e05bca61-4600-495c-b92a-25ac822e034e.png" alt="Redis\u4F7F\u7528IO\u591A\u8DEF\u590D\u7528\u548C\u81EA\u8EAB\u4E8B\u4EF6\u6A21\u578B"></li></ol><h3 id="_5-\u80FD\u8BF4\u4E00\u4E0Bi-o\u591A\u8DEF\u590D\u7528\u5417" tabindex="-1"><a class="header-anchor" href="#_5-\u80FD\u8BF4\u4E00\u4E0Bi-o\u591A\u8DEF\u590D\u7528\u5417" aria-hidden="true">#</a> 5.\u80FD\u8BF4\u4E00\u4E0BI/O\u591A\u8DEF\u590D\u7528\u5417\uFF1F</h3><p>\u5F15\u7528\u77E5\u4E4E\u4E0A\u4E00\u4E2A\u9AD8\u8D5E\u7684\u56DE\u7B54\u6765\u89E3\u91CA\u4EC0\u4E48\u662FI/O\u591A\u8DEF\u590D\u7528\u3002\u5047\u8BBE\u4F60\u662F\u4E00\u4E2A\u8001\u5E08\uFF0C\u8BA930\u4E2A\u5B66\u751F\u89E3\u7B54\u4E00\u9053\u9898\u76EE\uFF0C\u7136\u540E\u68C0\u67E5\u5B66\u751F\u505A\u7684\u662F\u5426\u6B63\u786E\uFF0C\u4F60\u6709\u4E0B\u9762\u51E0\u4E2A\u9009\u62E9\uFF1A</p><ul><li><p>\u7B2C\u4E00\u79CD\u9009\u62E9\uFF1A\u6309\u987A\u5E8F\u9010\u4E2A\u68C0\u67E5\uFF0C\u5148\u68C0\u67E5A\uFF0C\u7136\u540E\u662FB\uFF0C\u4E4B\u540E\u662FC\u3001D\u3002\u3002\u3002\u8FD9\u4E2D\u95F4\u5982\u679C\u6709\u4E00\u4E2A\u5B66\u751F\u5361\u4F4F\uFF0C\u5168\u73ED\u90FD\u4F1A\u88AB\u803D\u8BEF\u3002\u8FD9\u79CD\u6A21\u5F0F\u5C31\u597D\u6BD4\uFF0C\u4F60\u7528\u5FAA\u73AF\u6328\u4E2A\u5904\u7406socket\uFF0C\u6839\u672C\u4E0D\u5177\u6709\u5E76\u53D1\u80FD\u529B\u3002</p></li><li><p>\u7B2C\u4E8C\u79CD\u9009\u62E9\uFF1A\u4F60\u521B\u5EFA30\u4E2A\u5206\u8EAB\uFF0C\u6BCF\u4E2A\u5206\u8EAB\u68C0\u67E5\u4E00\u4E2A\u5B66\u751F\u7684\u7B54\u6848\u662F\u5426\u6B63\u786E\u3002 \u8FD9\u79CD\u7C7B\u4F3C\u4E8E\u4E3A\u6BCF\u4E00\u4E2A\u7528\u6237\u521B\u5EFA\u4E00\u4E2A\u8FDB\u7A0B\u6216\u8005- \u7EBF\u7A0B\u5904\u7406\u8FDE\u63A5\u3002</p></li><li><p>\u7B2C\u4E09\u79CD\u9009\u62E9\uFF0C\u4F60\u7AD9\u5728\u8BB2\u53F0\u4E0A\u7B49\uFF0C\u8C01\u89E3\u7B54\u5B8C\u8C01\u4E3E\u624B\u3002\u8FD9\u65F6C\u3001D\u4E3E\u624B\uFF0C\u8868\u793A\u4ED6\u4EEC\u89E3\u7B54\u95EE\u9898\u5B8C\u6BD5\uFF0C\u4F60\u4E0B\u53BB\u4F9D\u6B21\u68C0\u67E5C\u3001D\u7684\u7B54\u6848\uFF0C\u7136\u540E\u7EE7\u7EED\u56DE\u5230\u8BB2\u53F0\u4E0A\u7B49\u3002\u6B64\u65F6E\u3001A\u53C8\u4E3E\u624B\uFF0C\u7136\u540E\u53BB\u5904\u7406E\u548CA\u3002</p></li></ul><p>\u7B2C\u4E00\u79CD\u5C31\u662F\u963B\u585EIO\u6A21\u578B\uFF0C\u7B2C\u4E09\u79CD\u5C31\u662FI/O\u590D\u7528\u6A21\u578B\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-eb541432-d68a-4dd9-b427-96c4dd607d64.png" alt="\u591A\u8DEF\u590D\u7528\u6A21\u578B"></p><p>Linux\u7CFB\u7EDF\u6709\u4E09\u79CD\u65B9\u5F0F\u5B9E\u73B0IO\u591A\u8DEF\u590D\u7528\uFF1Aselect\u3001poll\u548Cepoll\u3002</p><p>\u4F8B\u5982epoll\u65B9\u5F0F\u662F\u5C06\u7528\u6237socket\u5BF9\u5E94\u7684fd\u6CE8\u518C\u8FDBepoll\uFF0C\u7136\u540Eepoll\u5E2E\u4F60\u76D1\u542C\u54EA\u4E9Bsocket\u4E0A\u6709\u6D88\u606F\u5230\u8FBE\uFF0C\u8FD9\u6837\u5C31\u907F\u514D\u4E86\u5927\u91CF\u7684\u65E0\u7528\u64CD\u4F5C\u3002\u6B64\u65F6\u7684socket\u5E94\u8BE5\u91C7\u7528\u975E\u963B\u585E\u6A21\u5F0F\u3002</p><p>\u8FD9\u6837\uFF0C\u6574\u4E2A\u8FC7\u7A0B\u53EA\u5728\u8FDB\u884Cselect\u3001poll\u3001epoll\u8FD9\u4E9B\u8C03\u7528\u7684\u65F6\u5019\u624D\u4F1A\u963B\u585E\uFF0C\u6536\u53D1\u5BA2\u6237\u6D88\u606F\u662F\u4E0D\u4F1A\u963B\u585E\u7684\uFF0C\u6574\u4E2A\u8FDB\u7A0B\u6216\u8005\u7EBF\u7A0B\u5C31\u88AB\u5145\u5206\u5229\u7528\u8D77\u6765\uFF0C\u8FD9\u5C31\u662F\u4E8B\u4EF6\u9A71\u52A8\uFF0C\u6240\u8C13\u7684reactor\u6A21\u5F0F\u3002</p><h3 id="_6-redis\u4E3A\u4EC0\u4E48\u65E9\u671F\u9009\u62E9\u5355\u7EBF\u7A0B" tabindex="-1"><a class="header-anchor" href="#_6-redis\u4E3A\u4EC0\u4E48\u65E9\u671F\u9009\u62E9\u5355\u7EBF\u7A0B" aria-hidden="true">#</a> 6. Redis\u4E3A\u4EC0\u4E48\u65E9\u671F\u9009\u62E9\u5355\u7EBF\u7A0B\uFF1F</h3><p>\u5B98\u65B9\u89E3\u91CA\uFF1Ahttps://redis.io/topics/faq</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-344b8461-98d4-495b-a697-70275b0abad6.png" alt="\u5B98\u65B9\u5355\u7EBF\u7A0B\u89E3\u91CA"> \u5B98\u65B9FAQ\u8868\u793A\uFF0C\u56E0\u4E3ARedis\u662F\u57FA\u4E8E\u5185\u5B58\u7684\u64CD\u4F5C\uFF0CCPU\u6210\u4E3ARedis\u7684\u74F6\u9888\u7684\u60C5\u51B5\u5F88\u5C11\u89C1\uFF0CRedis\u7684\u74F6\u9888\u6700\u6709\u53EF\u80FD\u662F\u5185\u5B58\u7684\u5927\u5C0F\u6216\u8005\u7F51\u7EDC\u9650\u5236\u3002</p><p>\u5982\u679C\u60F3\u8981\u6700\u5927\u7A0B\u5EA6\u5229\u7528CPU\uFF0C\u53EF\u4EE5\u5728\u4E00\u53F0\u673A\u5668\u4E0A\u542F\u52A8\u591A\u4E2ARedis\u5B9E\u4F8B\u3002</p><p>PS\uFF1A\u7F51\u4E0A\u6709\u8FD9\u6837\u7684\u56DE\u7B54\uFF0C\u5410\u69FD\u5B98\u65B9\u7684\u89E3\u91CA\u6709\u4E9B\u6577\u884D\uFF0C\u5176\u5B9E\u5C31\u662F\u5386\u53F2\u539F\u56E0\uFF0C\u5F00\u53D1\u8005\u5ACC\u591A\u7EBF\u7A0B\u9EBB\u70E6\uFF0C\u540E\u6765\u8FD9\u4E2ACPU\u7684\u5229\u7528\u95EE\u9898\u5C31\u88AB\u629B\u7ED9\u4E86\u4F7F\u7528\u8005\u3002</p><p>\u540C\u65F6FAQ\u91CC\u8FD8\u63D0\u5230\u4E86\uFF0C Redis 4.0 \u4E4B\u540E\u5F00\u59CB\u53D8\u6210\u591A\u7EBF\u7A0B\uFF0C\u9664\u4E86\u4E3B\u7EBF\u7A0B\u5916\uFF0C\u5B83\u4E5F\u6709\u540E\u53F0\u7EBF\u7A0B\u5728\u5904\u7406\u4E00\u4E9B\u8F83\u4E3A\u7F13\u6162\u7684\u64CD\u4F5C\uFF0C\u4F8B\u5982\u6E05\u7406\u810F\u6570\u636E\u3001\u65E0\u7528\u8FDE\u63A5\u7684\u91CA\u653E\u3001\u5927 Key \u7684\u5220\u9664\u7B49\u7B49\u3002</p><h3 id="_7-redis6-0\u4F7F\u7528\u591A\u7EBF\u7A0B\u662F\u600E\u4E48\u56DE\u4E8B" tabindex="-1"><a class="header-anchor" href="#_7-redis6-0\u4F7F\u7528\u591A\u7EBF\u7A0B\u662F\u600E\u4E48\u56DE\u4E8B" aria-hidden="true">#</a> 7.Redis6.0\u4F7F\u7528\u591A\u7EBF\u7A0B\u662F\u600E\u4E48\u56DE\u4E8B?</h3><p>Redis\u4E0D\u662F\u8BF4\u7528\u5355\u7EBF\u7A0B\u7684\u5417\uFF1F\u600E\u4E486.0\u6210\u4E86\u591A\u7EBF\u7A0B\u7684\uFF1F</p><p>Redis6.0\u7684\u591A\u7EBF\u7A0B\u662F\u7528\u591A\u7EBF\u7A0B\u6765\u5904\u7406\u6570\u636E\u7684<strong>\u8BFB\u5199\u548C\u534F\u8BAE\u89E3\u6790</strong>\uFF0C\u4F46\u662FRedis<strong>\u6267\u884C\u547D\u4EE4</strong>\u8FD8\u662F\u5355\u7EBF\u7A0B\u7684\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-b7b24e25-d2dc-4457-994f-95bdb3674b8e.png" alt="Redis6.0\u591A\u7EBF\u7A0B"> \u8FD9\u6837\u505A\u7684\u2F6C\u7684\u662F\u56E0\u4E3ARedis\u7684\u6027\u80FD\u74F6\u9888\u5728\u4E8E\u2F79\u7EDCIO\u2F7D\u2FAECPU\uFF0C\u4F7F\u2F64\u591A\u7EBF\u7A0B\u80FD\u63D0\u5347IO\u8BFB\u5199\u7684\u6548\u7387\uFF0C\u4ECE\u2F7D\u6574\u4F53\u63D0\u2FBCRedis\u7684\u6027\u80FD\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><h2 id="\u6301\u4E45\u5316" tabindex="-1"><a class="header-anchor" href="#\u6301\u4E45\u5316" aria-hidden="true">#</a> \u6301\u4E45\u5316</h2><h3 id="_8-redis\u6301\u4E45\u5316\u65B9\u5F0F\u6709\u54EA\u4E9B-\u6709\u4EC0\u4E48\u533A\u522B" tabindex="-1"><a class="header-anchor" href="#_8-redis\u6301\u4E45\u5316\u65B9\u5F0F\u6709\u54EA\u4E9B-\u6709\u4EC0\u4E48\u533A\u522B" aria-hidden="true">#</a> 8.Redis\u6301\u4E45\u5316\u2F45\u5F0F\u6709\u54EA\u4E9B\uFF1F\u6709\u4EC0\u4E48\u533A\u522B\uFF1F</h3><p>Redis\u6301\u4E45\u5316\u2F45\u6848\u5206\u4E3ARDB\u548CAOF\u4E24\u79CD\u3002 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-3bda4a46-adc3-4f0d-a135-b8ae5d4c0d5d.png" alt="Redis\u6301\u4E45\u5316\u4E24\u79CD\u65B9\u5F0F"></p><p><strong>RDB</strong></p><p>RDB\u6301\u4E45\u5316\u662F\u628A\u5F53\u524D\u8FDB\u7A0B\u6570\u636E\u751F\u6210<strong>\u5FEB\u7167</strong>\u4FDD\u5B58\u5230\u786C\u76D8\u7684\u8FC7\u7A0B\uFF0C\u89E6\u53D1RDB\u6301\u4E45\u5316\u8FC7\u7A0B\u5206\u4E3A\u624B\u52A8\u89E6\u53D1\u548C\u81EA\u52A8\u89E6\u53D1\u3002</p><p>RDB\u2F42\u4EF6\u662F\u2F00\u4E2A\u538B\u7F29\u7684\u2F06\u8FDB\u5236\u2F42\u4EF6\uFF0C\u901A\u8FC7\u5B83\u53EF\u4EE5\u8FD8\u539F\u67D0\u4E2A\u65F6\u523B\u6570\u636E\u5E93\u7684\u72B6\u6001\u3002\u7531\u4E8ERDB\u2F42\u4EF6\u662F\u4FDD\u5B58\u5728\u786C\u76D8\u4E0A\u7684\uFF0C\u6240\u4EE5\u5373\u4F7FRedis\u5D29\u6E83\u6216\u8005\u9000\u51FA\uFF0C\u53EA\u8981RDB\u2F42\u4EF6\u5B58\u5728\uFF0C\u5C31\u53EF\u4EE5\u2F64\u5B83\u6765\u6062\u590D\u8FD8\u539F\u6570\u636E\u5E93\u7684\u72B6\u6001\u3002</p><p>\u624B\u52A8\u89E6\u53D1\u5206\u522B\u5BF9\u5E94save\u548Cbgsave\u547D\u4EE4: <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-ffe56e32-34c5-453d-8859-c2febbe6a038.png" alt="save\u548Cbgsave"></p><ul><li><p>save\u547D\u4EE4\uFF1A\u963B\u585E\u5F53\u524DRedis\u670D\u52A1\u5668\uFF0C\u76F4\u5230RDB\u8FC7\u7A0B\u5B8C\u6210\u4E3A\u6B62\uFF0C\u5BF9\u4E8E\u5185\u5B58\u6BD4\u8F83\u5927\u7684\u5B9E\u4F8B\u4F1A\u9020\u6210\u957F\u65F6\u95F4\u963B\u585E\uFF0C\u7EBF\u4E0A\u73AF\u5883\u4E0D\u5EFA\u8BAE\u4F7F\u7528\u3002</p></li><li><p>bgsave\u547D\u4EE4\uFF1ARedis\u8FDB\u7A0B\u6267\u884Cfork\u64CD\u4F5C\u521B\u5EFA\u5B50\u8FDB\u7A0B\uFF0CRDB\u6301\u4E45\u5316\u8FC7\u7A0B\u7531\u5B50\u8FDB\u7A0B\u8D1F\u8D23\uFF0C\u5B8C\u6210\u540E\u81EA\u52A8\u7ED3\u675F\u3002\u963B\u585E\u53EA\u53D1\u751F\u5728fork\u9636\u6BB5\uFF0C\u4E00\u822C\u65F6\u95F4\u5F88\u77ED\u3002</p></li></ul><p>\u4EE5\u4E0B\u573A\u666F\u4F1A\u81EA\u52A8\u89E6\u53D1RDB\u6301\u4E45\u5316\uFF1A</p><ul><li>\u4F7F\u7528save\u76F8\u5173\u914D\u7F6E\uFF0C\u5982\u201Csave m n\u201D\u3002\u8868\u793Am\u79D2\u5185\u6570\u636E\u96C6\u5B58\u5728n\u6B21\u4FEE\u6539\u65F6\uFF0C\u81EA\u52A8\u89E6\u53D1bgsave\u3002</li><li>\u5982\u679C\u4ECE\u8282\u70B9\u6267\u884C\u5168\u91CF\u590D\u5236\u64CD\u4F5C\uFF0C\u4E3B\u8282\u70B9\u81EA\u52A8\u6267\u884Cbgsave\u751F\u6210RDB\u6587\u4EF6\u5E76\u53D1\u9001\u7ED9\u4ECE\u8282\u70B9</li><li>\u6267\u884Cdebug reload\u547D\u4EE4\u91CD\u65B0\u52A0\u8F7DRedis\u65F6\uFF0C\u4E5F\u4F1A\u81EA\u52A8\u89E6\u53D1save\u64CD\u4F5C</li><li>\u9ED8\u8BA4\u60C5\u51B5\u4E0B\u6267\u884Cshutdown\u547D\u4EE4\u65F6\uFF0C\u5982\u679C\u6CA1\u6709\u5F00\u542FAOF\u6301\u4E45\u5316\u529F\u80FD\u5219\u81EA\u52A8\u6267\u884Cbgsave\u3002</li></ul><p><strong>AOF</strong></p><p>AOF\uFF08append only file\uFF09\u6301\u4E45\u5316\uFF1A\u4EE5\u72EC\u7ACB\u65E5\u5FD7\u7684\u65B9\u5F0F\u8BB0\u5F55\u6BCF\u6B21\u5199\u547D\u4EE4\uFF0C \u91CD\u542F\u65F6\u518D\u91CD\u65B0\u6267\u884CAOF\u6587\u4EF6\u4E2D\u7684\u547D\u4EE4\u8FBE\u5230\u6062\u590D\u6570\u636E\u7684\u76EE\u7684\u3002AOF\u7684\u4E3B\u8981\u4F5C\u7528\u662F\u89E3\u51B3\u4E86\u6570\u636E\u6301\u4E45\u5316\u7684\u5B9E\u65F6\u6027\uFF0C\u76EE\u524D\u5DF2\u7ECF\u662FRedis\u6301\u4E45\u5316\u7684\u4E3B\u6D41\u65B9\u5F0F\u3002</p><p>AOF\u7684\u5DE5\u4F5C\u6D41\u7A0B\u64CD\u4F5C\uFF1A\u547D\u4EE4\u5199\u5165 \uFF08append\uFF09\u3001\u6587\u4EF6\u540C\u6B65\uFF08sync\uFF09\u3001\u6587\u4EF6\u91CD\u5199\uFF08rewrite\uFF09\u3001\u91CD\u542F\u52A0\u8F7D \uFF08load\uFF09 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-a9fb6202-b1a1-484d-a4fa-fef519090b44.png" alt="AOF\u5DE5\u4F5C\u6D41\u7A0B">\u6D41\u7A0B\u5982\u4E0B\uFF1A</p><p>1\uFF09\u6240\u6709\u7684\u5199\u5165\u547D\u4EE4\u4F1A\u8FFD\u52A0\u5230aof_buf\uFF08\u7F13\u51B2\u533A\uFF09\u4E2D\u3002</p><p>2\uFF09AOF\u7F13\u51B2\u533A\u6839\u636E\u5BF9\u5E94\u7684\u7B56\u7565\u5411\u786C\u76D8\u505A\u540C\u6B65\u64CD\u4F5C\u3002</p><p>3\uFF09\u968F\u7740AOF\u6587\u4EF6\u8D8A\u6765\u8D8A\u5927\uFF0C\u9700\u8981\u5B9A\u671F\u5BF9AOF\u6587\u4EF6\u8FDB\u884C\u91CD\u5199\uFF0C\u8FBE\u5230\u538B\u7F29 \u7684\u76EE\u7684\u3002</p><p>4\uFF09\u5F53Redis\u670D\u52A1\u5668\u91CD\u542F\u65F6\uFF0C\u53EF\u4EE5\u52A0\u8F7DAOF\u6587\u4EF6\u8FDB\u884C\u6570\u636E\u6062\u590D\u3002</p><h3 id="_9-rdb-\u548C-aof-\u5404\u81EA\u6709\u4EC0\u4E48\u4F18\u7F3A\u70B9" tabindex="-1"><a class="header-anchor" href="#_9-rdb-\u548C-aof-\u5404\u81EA\u6709\u4EC0\u4E48\u4F18\u7F3A\u70B9" aria-hidden="true">#</a> 9.RDB \u548C AOF \u5404\u81EA\u6709\u4EC0\u4E48\u4F18\u7F3A\u70B9\uFF1F</h3><p><strong>RDB | \u4F18\u70B9</strong></p><ol><li>\u53EA\u6709\u4E00\u4E2A\u7D27\u51D1\u7684\u4E8C\u8FDB\u5236\u6587\u4EF6 <code>dump.rdb</code>\uFF0C\u975E\u5E38\u9002\u5408\u5907\u4EFD\u3001\u5168\u91CF\u590D\u5236\u7684\u573A\u666F\u3002</li><li><strong>\u5BB9\u707E\u6027\u597D</strong>\uFF0C\u53EF\u4EE5\u628ARDB\u6587\u4EF6\u62F7\u8D1D\u9053\u8FDC\u7A0B\u673A\u5668\u6216\u8005\u6587\u4EF6\u7CFB\u7EDF\u5F20\uFF0C\u7528\u4E8E\u5BB9\u707E\u6062\u590D\u3002</li><li><strong>\u6062\u590D\u901F\u5EA6\u5FEB</strong>\uFF0CRDB\u6062\u590D\u6570\u636E\u7684\u901F\u5EA6\u8FDC\u8FDC\u5FEB\u4E8EAOF\u7684\u65B9\u5F0F</li></ol><p><strong>RDB | \u7F3A\u70B9</strong></p><ol><li><strong>\u5B9E\u65F6\u6027\u4F4E</strong>\uFF0CRDB \u662F\u95F4\u9694\u4E00\u6BB5\u65F6\u95F4\u8FDB\u884C\u6301\u4E45\u5316\uFF0C\u6CA1\u6CD5\u505A\u5230\u5B9E\u65F6\u6301\u4E45\u5316/\u79D2\u7EA7\u6301\u4E45\u5316\u3002\u5982\u679C\u5728\u8FD9\u4E00\u95F4\u9694\u4E8B\u4EF6\u53D1\u751F\u6545\u969C\uFF0C\u6570\u636E\u4F1A\u4E22\u5931\u3002</li><li><strong>\u5B58\u5728\u517C\u5BB9\u95EE\u9898</strong>\uFF0CRedis\u6F14\u8FDB\u8FC7\u7A0B\u5B58\u5728\u591A\u4E2A\u683C\u5F0F\u7684RDB\u7248\u672C\uFF0C\u5B58\u5728\u8001\u7248\u672CRedis\u65E0\u6CD5\u517C\u5BB9\u65B0\u7248\u672CRDB\u7684\u95EE\u9898\u3002</li></ol><p><strong>AOF | \u4F18\u70B9</strong></p><ol><li><strong>\u5B9E\u65F6\u6027\u597D</strong>\uFF0Caof \u6301\u4E45\u5316\u53EF\u4EE5\u914D\u7F6E <code>appendfsync</code> \u5C5E\u6027\uFF0C\u6709 <code>always</code>\uFF0C\u6BCF\u8FDB\u884C\u4E00\u6B21\u547D\u4EE4\u64CD\u4F5C\u5C31\u8BB0\u5F55\u5230 aof \u6587\u4EF6\u4E2D\u4E00\u6B21\u3002</li><li>\u901A\u8FC7 append \u6A21\u5F0F\u5199\u6587\u4EF6\uFF0C\u5373\u4F7F\u4E2D\u9014\u670D\u52A1\u5668\u5B95\u673A\uFF0C\u53EF\u4EE5\u901A\u8FC7 redis-check-aof \u5DE5\u5177\u89E3\u51B3\u6570\u636E\u4E00\u81F4\u6027\u95EE\u9898\u3002</li></ol><p><strong>AOF | \u7F3A\u70B9</strong></p><ol><li>AOF \u6587\u4EF6\u6BD4 RDB <strong>\u6587\u4EF6\u5927</strong>\uFF0C\u4E14 <strong>\u6062\u590D\u901F\u5EA6\u6162</strong>\u3002</li><li><strong>\u6570\u636E\u96C6\u5927</strong> \u7684\u65F6\u5019\uFF0C\u6BD4 RDB <strong>\u542F\u52A8\u6548\u7387\u4F4E</strong>\u3002</li></ol><h3 id="_10-rdb\u548Caof\u5982\u4F55\u9009\u62E9" tabindex="-1"><a class="header-anchor" href="#_10-rdb\u548Caof\u5982\u4F55\u9009\u62E9" aria-hidden="true">#</a> 10.RDB\u548CAOF\u5982\u4F55\u9009\u62E9\uFF1F</h3><ul><li>\u4E00\u822C\u6765\u8BF4\uFF0C \u5982\u679C\u60F3\u8FBE\u5230\u8DB3\u4EE5\u5AB2\u7F8E\u6570\u636E\u5E93\u7684 <strong>\u6570\u636E\u5B89\u5168\u6027</strong>\uFF0C\u5E94\u8BE5 <strong>\u540C\u65F6\u4F7F\u7528\u4E24\u79CD\u6301\u4E45\u5316\u529F\u80FD</strong>\u3002\u5728\u8FD9\u79CD\u60C5\u51B5\u4E0B\uFF0C\u5F53 Redis \u91CD\u542F\u7684\u65F6\u5019\u4F1A\u4F18\u5148\u8F7D\u5165 AOF \u6587\u4EF6\u6765\u6062\u590D\u539F\u59CB\u7684\u6570\u636E\uFF0C\u56E0\u4E3A\u5728\u901A\u5E38\u60C5\u51B5\u4E0B AOF \u6587\u4EF6\u4FDD\u5B58\u7684\u6570\u636E\u96C6\u8981\u6BD4 RDB \u6587\u4EF6\u4FDD\u5B58\u7684\u6570\u636E\u96C6\u8981\u5B8C\u6574\u3002</li><li>\u5982\u679C <strong>\u53EF\u4EE5\u63A5\u53D7\u6570\u5206\u949F\u4EE5\u5185\u7684\u6570\u636E\u4E22\u5931</strong>\uFF0C\u90A3\u4E48\u53EF\u4EE5 <strong>\u53EA\u4F7F\u7528 RDB \u6301\u4E45\u5316</strong>\u3002</li><li>\u6709\u5F88\u591A\u7528\u6237\u90FD\u53EA\u4F7F\u7528 AOF \u6301\u4E45\u5316\uFF0C\u4F46\u5E76\u4E0D\u63A8\u8350\u8FD9\u79CD\u65B9\u5F0F\uFF0C\u56E0\u4E3A\u5B9A\u65F6\u751F\u6210 RDB \u5FEB\u7167\uFF08snapshot\uFF09\u975E\u5E38\u4FBF\u4E8E\u8FDB\u884C\u6570\u636E\u5907\u4EFD\uFF0C \u5E76\u4E14 RDB \u6062\u590D\u6570\u636E\u96C6\u7684\u901F\u5EA6\u4E5F\u8981\u6BD4 AOF \u6062\u590D\u7684\u901F\u5EA6\u8981\u5FEB\uFF0C\u9664\u6B64\u4E4B\u5916\uFF0C\u4F7F\u7528 RDB \u8FD8\u53EF\u4EE5\u907F\u514D AOF \u7A0B\u5E8F\u7684 bug\u3002</li><li>\u5982\u679C\u53EA\u9700\u8981\u6570\u636E\u5728\u670D\u52A1\u5668\u8FD0\u884C\u7684\u65F6\u5019\u5B58\u5728\uFF0C\u4E5F\u53EF\u4EE5\u4E0D\u4F7F\u7528\u4EFB\u4F55\u6301\u4E45\u5316\u65B9\u5F0F\u3002</li></ul><h3 id="_11-redis\u7684\u6570\u636E\u6062\u590D" tabindex="-1"><a class="header-anchor" href="#_11-redis\u7684\u6570\u636E\u6062\u590D" aria-hidden="true">#</a> 11.Redis\u7684\u6570\u636E\u6062\u590D\uFF1F</h3><p>\u5F53Redis\u53D1\u751F\u4E86\u6545\u969C\uFF0C\u53EF\u4EE5\u4ECERDB\u6216\u8005AOF\u4E2D\u6062\u590D\u6570\u636E\u3002</p><p>\u6062\u590D\u7684\u8FC7\u7A0B\u4E5F\u5F88\u7B80\u5355\uFF0C\u628ARDB\u6216\u8005AOF\u6587\u4EF6\u62F7\u8D1D\u5230Redis\u7684\u6570\u636E\u76EE\u5F55\u4E0B\uFF0C\u5982\u679C\u4F7F\u7528AOF\u6062\u590D\uFF0C\u914D\u7F6E\u6587\u4EF6\u5F00\u542FAOF\uFF0C\u7136\u540E\u542F\u52A8redis-server\u5373\u53EF\u3002 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-f9aab5e9-a875-4316-9ec9-0c5650afe5c1.png" alt="Redis\u542F\u52A8\u52A0\u8F7D\u6570\u636E"></p><p><strong>Redis</strong> \u542F\u52A8\u65F6\u52A0\u8F7D\u6570\u636E\u7684\u6D41\u7A0B\uFF1A</p><ol><li>AOF\u6301\u4E45\u5316\u5F00\u542F\u4E14\u5B58\u5728AOF\u6587\u4EF6\u65F6\uFF0C\u4F18\u5148\u52A0\u8F7DAOF\u6587\u4EF6\u3002</li><li>AOF\u5173\u95ED\u6216\u8005AOF\u6587\u4EF6\u4E0D\u5B58\u5728\u65F6\uFF0C\u52A0\u8F7DRDB\u6587\u4EF6\u3002</li><li>\u52A0\u8F7DAOF/RDB\u6587\u4EF6\u6210\u529F\u540E\uFF0CRedis\u542F\u52A8\u6210\u529F\u3002</li><li>AOF/RDB\u6587\u4EF6\u5B58\u5728\u9519\u8BEF\u65F6\uFF0CRedis\u542F\u52A8\u5931\u8D25\u5E76\u6253\u5370\u9519\u8BEF\u4FE1\u606F\u3002</li></ol><h3 id="_12-redis-4-0-\u7684\u6DF7\u5408\u6301\u4E45\u5316\u4E86\u89E3\u5417" tabindex="-1"><a class="header-anchor" href="#_12-redis-4-0-\u7684\u6DF7\u5408\u6301\u4E45\u5316\u4E86\u89E3\u5417" aria-hidden="true">#</a> 12.Redis 4.0 \u7684\u6DF7\u5408\u6301\u4E45\u5316\u4E86\u89E3\u5417\uFF1F</h3><p>\u91CD\u542F Redis \u65F6\uFF0C\u6211\u4EEC\u5F88\u5C11\u4F7F\u7528 <code>RDB</code> \u6765\u6062\u590D\u5185\u5B58\u72B6\u6001\uFF0C\u56E0\u4E3A\u4F1A\u4E22\u5931\u5927\u91CF\u6570\u636E\u3002\u6211\u4EEC\u901A\u5E38\u4F7F\u7528 AOF \u65E5\u5FD7\u91CD\u653E\uFF0C\u4F46\u662F\u91CD\u653E AOF \u65E5\u5FD7\u6027\u80FD\u76F8\u5BF9 <code>RDB</code> \u6765\u8BF4\u8981\u6162\u5F88\u591A\uFF0C\u8FD9\u6837\u5728 Redis \u5B9E\u4F8B\u5F88\u5927\u7684\u60C5\u51B5\u4E0B\uFF0C\u542F\u52A8\u9700\u8981\u82B1\u8D39\u5F88\u957F\u7684\u65F6\u95F4\u3002</p><p><strong>Redis 4.0</strong> \u4E3A\u4E86\u89E3\u51B3\u8FD9\u4E2A\u95EE\u9898\uFF0C\u5E26\u6765\u4E86\u4E00\u4E2A\u65B0\u7684\u6301\u4E45\u5316\u9009\u9879\u2014\u2014<strong>\u6DF7\u5408\u6301\u4E45\u5316</strong>\u3002\u5C06 <code>rdb</code> \u6587\u4EF6\u7684\u5185\u5BB9\u548C\u589E\u91CF\u7684 AOF \u65E5\u5FD7\u6587\u4EF6\u5B58\u5728\u4E00\u8D77\u3002\u8FD9\u91CC\u7684 AOF \u65E5\u5FD7\u4E0D\u518D\u662F\u5168\u91CF\u7684\u65E5\u5FD7\uFF0C\u800C\u662F <strong>\u81EA\u6301\u4E45\u5316\u5F00\u59CB\u5230\u6301\u4E45\u5316\u7ED3\u675F</strong> \u7684\u8FD9\u6BB5\u65F6\u95F4\u53D1\u751F\u7684\u589E\u91CF AOF \u65E5\u5FD7\uFF0C\u901A\u5E38\u8FD9\u90E8\u5206 AOF \u65E5\u5FD7\u5F88\u5C0F\uFF1A <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-19c531e5-da95-495a-a4c4-d63a0b8bba95.png" alt="\u6DF7\u5408\u6301\u4E45\u5316"></p><p>\u4E8E\u662F\u5728 Redis \u91CD\u542F\u7684\u65F6\u5019\uFF0C\u53EF\u4EE5\u5148\u52A0\u8F7D <code>rdb</code> \u7684\u5185\u5BB9\uFF0C\u7136\u540E\u518D\u91CD\u653E\u589E\u91CF AOF \u65E5\u5FD7\u5C31\u53EF\u4EE5\u5B8C\u5168\u66FF\u4EE3\u4E4B\u524D\u7684 AOF \u5168\u91CF\u6587\u4EF6\u91CD\u653E\uFF0C\u91CD\u542F\u6548\u7387\u56E0\u6B64\u5927\u5E45\u5F97\u5230\u63D0\u5347\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><h2 id="\u9AD8\u53EF\u7528" tabindex="-1"><a class="header-anchor" href="#\u9AD8\u53EF\u7528" aria-hidden="true">#</a> \u9AD8\u53EF\u7528</h2><p>Redis\u4FDD\u8BC1\u9AD8\u53EF\u7528\u4E3B\u8981\u6709\u4E09\u79CD\u65B9\u5F0F\uFF1A\u4E3B\u4ECE\u3001\u54E8\u5175\u3001\u96C6\u7FA4\u3002</p><h3 id="_13-\u4E3B\u4ECE\u590D\u5236\u4E86\u89E3\u5417" tabindex="-1"><a class="header-anchor" href="#_13-\u4E3B\u4ECE\u590D\u5236\u4E86\u89E3\u5417" aria-hidden="true">#</a> 13.\u4E3B\u4ECE\u590D\u5236\u4E86\u89E3\u5417\uFF1F</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-60497f1e-8afb-44b3-bb7a-d4c29e5ac484.png" alt="Redis\u4E3B\u4ECE\u590D\u5236\u7B80\u56FE"></p><p><strong>\u4E3B\u4ECE\u590D\u5236</strong>\uFF0C\u662F\u6307\u5C06\u4E00\u53F0 Redis \u670D\u52A1\u5668\u7684\u6570\u636E\uFF0C\u590D\u5236\u5230\u5176\u4ED6\u7684 Redis \u670D\u52A1\u5668\u3002\u524D\u8005\u79F0\u4E3A <strong>\u4E3B\u8282\u70B9(master)</strong>\uFF0C\u540E\u8005\u79F0\u4E3A <strong>\u4ECE\u8282\u70B9(slave)</strong>\u3002\u4E14\u6570\u636E\u7684\u590D\u5236\u662F <strong>\u5355\u5411</strong> \u7684\uFF0C\u53EA\u80FD\u7531\u4E3B\u8282\u70B9\u5230\u4ECE\u8282\u70B9\u3002Redis \u4E3B\u4ECE\u590D\u5236\u652F\u6301 <strong>\u4E3B\u4ECE\u540C\u6B65</strong> \u548C <strong>\u4ECE\u4ECE\u540C\u6B65</strong> \u4E24\u79CD\uFF0C\u540E\u8005\u662F Redis \u540E\u7EED\u7248\u672C\u65B0\u589E\u7684\u529F\u80FD\uFF0C\u4EE5\u51CF\u8F7B\u4E3B\u8282\u70B9\u7684\u540C\u6B65\u8D1F\u62C5\u3002</p><blockquote><p>\u4E3B\u4ECE\u590D\u5236\u4E3B\u8981\u7684\u4F5C\u7528?</p></blockquote><ul><li><strong>\u6570\u636E\u5197\u4F59\uFF1A</strong> \u4E3B\u4ECE\u590D\u5236\u5B9E\u73B0\u4E86\u6570\u636E\u7684\u70ED\u5907\u4EFD\uFF0C\u662F\u6301\u4E45\u5316\u4E4B\u5916\u7684\u4E00\u79CD\u6570\u636E\u5197\u4F59\u65B9\u5F0F\u3002</li><li><strong>\u6545\u969C\u6062\u590D\uFF1A</strong> \u5F53\u4E3B\u8282\u70B9\u51FA\u73B0\u95EE\u9898\u65F6\uFF0C\u53EF\u4EE5\u7531\u4ECE\u8282\u70B9\u63D0\u4F9B\u670D\u52A1\uFF0C\u5B9E\u73B0\u5FEB\u901F\u7684\u6545\u969C\u6062\u590D <em>(\u5B9E\u9645\u4E0A\u662F\u4E00\u79CD\u670D\u52A1\u7684\u5197\u4F59)</em>\u3002</li><li><strong>\u8D1F\u8F7D\u5747\u8861\uFF1A</strong> \u5728\u4E3B\u4ECE\u590D\u5236\u7684\u57FA\u7840\u4E0A\uFF0C\u914D\u5408\u8BFB\u5199\u5206\u79BB\uFF0C\u53EF\u4EE5\u7531\u4E3B\u8282\u70B9\u63D0\u4F9B\u5199\u670D\u52A1\uFF0C\u7531\u4ECE\u8282\u70B9\u63D0\u4F9B\u8BFB\u670D\u52A1 <em>\uFF08\u5373\u5199 Redis \u6570\u636E\u65F6\u5E94\u7528\u8FDE\u63A5\u4E3B\u8282\u70B9\uFF0C\u8BFB Redis \u6570\u636E\u65F6\u5E94\u7528\u8FDE\u63A5\u4ECE\u8282\u70B9\uFF09</em>\uFF0C\u5206\u62C5\u670D\u52A1\u5668\u8D1F\u8F7D\u3002\u5C24\u5176\u662F\u5728\u5199\u5C11\u8BFB\u591A\u7684\u573A\u666F\u4E0B\uFF0C\u901A\u8FC7\u591A\u4E2A\u4ECE\u8282\u70B9\u5206\u62C5\u8BFB\u8D1F\u8F7D\uFF0C\u53EF\u4EE5\u5927\u5927\u63D0\u9AD8 Redis \u670D\u52A1\u5668\u7684\u5E76\u53D1\u91CF\u3002</li><li><strong>\u9AD8\u53EF\u7528\u57FA\u77F3\uFF1A</strong> \u9664\u4E86\u4E0A\u8FF0\u4F5C\u7528\u4EE5\u5916\uFF0C\u4E3B\u4ECE\u590D\u5236\u8FD8\u662F\u54E8\u5175\u548C\u96C6\u7FA4\u80FD\u591F\u5B9E\u65BD\u7684 <strong>\u57FA\u7840</strong>\uFF0C\u56E0\u6B64\u8BF4\u4E3B\u4ECE\u590D\u5236\u662F Redis \u9AD8\u53EF\u7528\u7684\u57FA\u7840\u3002</li></ul><h3 id="_14-redis\u4E3B\u4ECE\u6709\u51E0\u79CD\u5E38\u89C1\u7684\u62D3\u6251\u7ED3\u6784" tabindex="-1"><a class="header-anchor" href="#_14-redis\u4E3B\u4ECE\u6709\u51E0\u79CD\u5E38\u89C1\u7684\u62D3\u6251\u7ED3\u6784" aria-hidden="true">#</a> 14.Redis\u4E3B\u4ECE\u6709\u51E0\u79CD\u5E38\u89C1\u7684\u62D3\u6251\u7ED3\u6784\uFF1F</h3><p>Redis\u7684\u590D\u5236\u62D3\u6251\u7ED3\u6784\u53EF\u4EE5\u652F\u6301\u5355\u5C42\u6216\u591A\u5C42\u590D\u5236\u5173\u7CFB\uFF0C\u6839\u636E\u62D3\u6251\u590D\u6742\u6027\u53EF\u4EE5\u5206\u4E3A\u4EE5\u4E0B\u4E09\u79CD\uFF1A\u4E00\u4E3B\u4E00\u4ECE\u3001\u4E00\u4E3B\u591A\u4ECE\u3001\u6811\u72B6\u4E3B\u4ECE\u7ED3\u6784\u3002</p><p>1.\u4E00\u4E3B\u4E00\u4ECE\u7ED3\u6784</p><p>\u4E00\u4E3B\u4E00\u4ECE\u7ED3\u6784\u662F\u6700\u7B80\u5355\u7684\u590D\u5236\u62D3\u6251\u7ED3\u6784\uFF0C\u7528\u4E8E\u4E3B\u8282\u70B9\u51FA\u73B0\u5B95\u673A\u65F6\u4ECE\u8282\u70B9\u63D0\u4F9B\u6545\u969C\u8F6C\u79FB\u652F\u6301\u3002 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-5d91a67c-dbff-4a8d-bf9d-1fe7602d5a27.png" alt="\u4E00\u4E3B\u4E00\u4ECE\u7ED3\u6784"> 2.\u4E00\u4E3B\u591A\u4ECE\u7ED3\u6784</p><p>\u4E00\u4E3B\u591A\u4ECE\u7ED3\u6784\uFF08\u53C8\u79F0\u4E3A\u661F\u5F62\u62D3\u6251\u7ED3\u6784\uFF09\u4F7F\u5F97\u5E94\u7528\u7AEF\u53EF\u4EE5\u5229\u7528\u591A\u4E2A\u4ECE\u8282\u70B9\u5B9E\u73B0\u8BFB\u5199\u5206\u79BB\uFF08\u89C1\u56FE6-5\uFF09\u3002\u5BF9\u4E8E\u8BFB\u5360\u6BD4\u8F83\u5927\u7684\u573A\u666F\uFF0C\u53EF\u4EE5\u628A\u8BFB\u547D\u4EE4\u53D1\u9001\u5230\u4ECE\u8282\u70B9\u6765\u5206\u62C5\u4E3B\u8282\u70B9\u538B\u529B\u3002 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-71074254-699a-480b-bbb0-c68f364a380b.png" alt="\u4E00\u4E3B\u591A\u4ECE\u7ED3\u6784"> 3.\u6811\u72B6\u4E3B\u4ECE\u7ED3\u6784</p><p>\u6811\u72B6\u4E3B\u4ECE\u7ED3\u6784\uFF08\u53C8\u79F0\u4E3A\u6811\u72B6\u62D3\u6251\u7ED3\u6784\uFF09\u4F7F\u5F97\u4ECE\u8282\u70B9\u4E0D\u4F46\u53EF\u4EE5\u590D\u5236\u4E3B\u8282\u70B9\u6570\u636E\uFF0C\u540C\u65F6\u53EF\u4EE5\u4F5C\u4E3A\u5176\u4ED6\u4ECE\u8282\u70B9\u7684\u4E3B\u8282\u70B9\u7EE7\u7EED\u5411\u4E0B\u5C42\u590D\u5236\u3002\u901A\u8FC7\u5F15\u5165\u590D\u5236\u4E2D\u95F4\u5C42\uFF0C\u53EF\u4EE5\u6709\u6548\u964D\u4F4E\u4E3B\u8282\u70B9\u8D1F\u8F7D\u548C\u9700\u8981\u4F20\u9001\u7ED9\u4ECE\u8282\u70B9\u7684\u6570\u636E\u91CF\u3002 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-dff14203-5e01-4d1b-a775-10ee444ada54.png" alt="\u6811\u72B6\u4E3B\u4ECE\u7ED3\u6784"></p><h3 id="_15-redis\u7684\u4E3B\u4ECE\u590D\u5236\u539F\u7406\u4E86\u89E3\u5417" tabindex="-1"><a class="header-anchor" href="#_15-redis\u7684\u4E3B\u4ECE\u590D\u5236\u539F\u7406\u4E86\u89E3\u5417" aria-hidden="true">#</a> 15.Redis\u7684\u4E3B\u4ECE\u590D\u5236\u539F\u7406\u4E86\u89E3\u5417\uFF1F</h3><p>Redis\u4E3B\u4ECE\u590D\u5236\u7684\u5DE5\u4F5C\u6D41\u7A0B\u5927\u6982\u53EF\u4EE5\u5206\u4E3A\u5982\u4E0B\u51E0\u6B65\uFF1A <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-21123b1e-68b4-436b-ac84-3365a49a81bd.png" alt="Redis\u4E3B\u4ECE\u590D\u5236\u5DE5\u4F5C\u6D41\u7A0B"></p><ol><li>\u4FDD\u5B58\u4E3B\u8282\u70B9\uFF08master\uFF09\u4FE1\u606F \u8FD9\u4E00\u6B65\u53EA\u662F\u4FDD\u5B58\u4E3B\u8282\u70B9\u4FE1\u606F\uFF0C\u4FDD\u5B58\u4E3B\u8282\u70B9\u7684ip\u548Cport\u3002</li><li>\u4E3B\u4ECE\u5EFA\u7ACB\u8FDE\u63A5 \u4ECE\u8282\u70B9\uFF08slave\uFF09\u53D1\u73B0\u65B0\u7684\u4E3B\u8282\u70B9\u540E\uFF0C\u4F1A\u5C1D\u8BD5\u548C\u4E3B\u8282\u70B9\u5EFA\u7ACB\u7F51\u7EDC\u8FDE\u63A5\u3002</li><li>\u53D1\u9001ping\u547D\u4EE4 \u8FDE\u63A5\u5EFA\u7ACB\u6210\u529F\u540E\u4ECE\u8282\u70B9\u53D1\u9001ping\u8BF7\u6C42\u8FDB\u884C\u9996\u6B21\u901A\u4FE1\uFF0C\u4E3B\u8981\u662F\u68C0\u6D4B\u4E3B\u4ECE\u4E4B\u95F4\u7F51\u7EDC\u5957\u63A5\u5B57\u662F\u5426\u53EF\u7528\u3001\u4E3B\u8282\u70B9\u5F53\u524D\u662F\u5426\u53EF\u63A5\u53D7\u5904\u7406\u547D\u4EE4\u3002</li><li>\u6743\u9650\u9A8C\u8BC1 \u5982\u679C\u4E3B\u8282\u70B9\u8981\u6C42\u5BC6\u7801\u9A8C\u8BC1\uFF0C\u4ECE\u8282\u70B9\u5FC5\u987B\u6B63\u786E\u7684\u5BC6\u7801\u624D\u80FD\u901A\u8FC7\u9A8C\u8BC1\u3002</li><li>\u540C\u6B65\u6570\u636E\u96C6 \u4E3B\u4ECE\u590D\u5236\u8FDE\u63A5\u6B63\u5E38\u901A\u4FE1\u540E\uFF0C\u4E3B\u8282\u70B9\u4F1A\u628A\u6301\u6709\u7684\u6570\u636E\u5168\u90E8\u53D1\u9001\u7ED9\u4ECE\u8282\u70B9\u3002</li><li>\u547D\u4EE4\u6301\u7EED\u590D\u5236 \u63A5\u4E0B\u6765\u4E3B\u8282\u70B9\u4F1A\u6301\u7EED\u5730\u628A\u5199\u547D\u4EE4\u53D1\u9001\u7ED9\u4ECE\u8282\u70B9\uFF0C\u4FDD\u8BC1\u4E3B\u4ECE\u6570\u636E\u4E00\u81F4\u6027\u3002</li></ol><h3 id="_16-\u8BF4\u8BF4\u4E3B\u4ECE\u6570\u636E\u540C\u6B65\u7684\u65B9\u5F0F" tabindex="-1"><a class="header-anchor" href="#_16-\u8BF4\u8BF4\u4E3B\u4ECE\u6570\u636E\u540C\u6B65\u7684\u65B9\u5F0F" aria-hidden="true">#</a> 16.\u8BF4\u8BF4\u4E3B\u4ECE\u6570\u636E\u540C\u6B65\u7684\u65B9\u5F0F\uFF1F</h3><p>Redis\u57282.8\u53CA\u4EE5\u4E0A\u7248\u672C\u4F7F\u7528psync\u547D\u4EE4\u5B8C\u6210\u4E3B\u4ECE\u6570\u636E\u540C\u6B65\uFF0C\u540C\u6B65\u8FC7\u7A0B\u5206\u4E3A\uFF1A\u5168\u91CF\u590D\u5236\u548C\u90E8\u5206\u590D\u5236\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-7518f715-6dee-4e70-b972-8aed9879e451.png" alt="\u4E3B\u4ECE\u6570\u636E\u540C\u6B65\u65B9\u5F0F"></p><p><strong>\u5168\u91CF\u590D\u5236</strong> \u4E00\u822C\u7528\u4E8E\u521D\u6B21\u590D\u5236\u573A\u666F\uFF0CRedis\u65E9\u671F\u652F\u6301\u7684\u590D\u5236\u529F\u80FD\u53EA\u6709\u5168\u91CF\u590D\u5236\uFF0C\u5B83\u4F1A\u628A\u4E3B\u8282\u70B9\u5168\u90E8\u6570\u636E\u4E00\u6B21\u6027\u53D1\u9001\u7ED9\u4ECE\u8282\u70B9\uFF0C\u5F53\u6570\u636E\u91CF\u8F83\u5927\u65F6\uFF0C\u4F1A\u5BF9\u4E3B\u4ECE\u8282\u70B9\u548C\u7F51\u7EDC\u9020\u6210\u5F88\u5927\u7684\u5F00\u9500\u3002</p><p>\u5168\u91CF\u590D\u5236\u7684\u5B8C\u6574\u8FD0\u884C\u6D41\u7A0B\u5982\u4E0B\uFF1A <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-aa8d2960-b341-49cc-b04c-201241fd15de.png" alt="\u5168\u91CF\u590D\u5236"></p><ol><li>\u53D1\u9001psync\u547D\u4EE4\u8FDB\u884C\u6570\u636E\u540C\u6B65\uFF0C\u7531\u4E8E\u662F\u7B2C\u4E00\u6B21\u8FDB\u884C\u590D\u5236\uFF0C\u4ECE\u8282\u70B9\u6CA1\u6709\u590D\u5236\u504F\u79FB\u91CF\u548C\u4E3B\u8282\u70B9\u7684\u8FD0\u884CID\uFF0C\u6240\u4EE5\u53D1\u9001psync-1\u3002</li><li>\u4E3B\u8282\u70B9\u6839\u636Epsync-1\u89E3\u6790\u51FA\u5F53\u524D\u4E3A\u5168\u91CF\u590D\u5236\uFF0C\u56DE\u590D+FULLRESYNC\u54CD\u5E94\u3002</li><li>\u4ECE\u8282\u70B9\u63A5\u6536\u4E3B\u8282\u70B9\u7684\u54CD\u5E94\u6570\u636E\u4FDD\u5B58\u8FD0\u884CID\u548C\u504F\u79FB\u91CFoffset</li><li>\u4E3B\u8282\u70B9\u6267\u884Cbgsave\u4FDD\u5B58RDB\u6587\u4EF6\u5230\u672C\u5730</li><li>\u4E3B\u8282\u70B9\u53D1\u9001RDB\u6587\u4EF6\u7ED9\u4ECE\u8282\u70B9\uFF0C\u4ECE\u8282\u70B9\u628A\u63A5\u6536\u7684RDB\u6587\u4EF6\u4FDD\u5B58\u5728\u672C\u5730\u5E76\u76F4\u63A5\u4F5C\u4E3A\u4ECE\u8282\u70B9\u7684\u6570\u636E\u6587\u4EF6</li><li>\u5BF9\u4E8E\u4ECE\u8282\u70B9\u5F00\u59CB\u63A5\u6536RDB\u5FEB\u7167\u5230\u63A5\u6536\u5B8C\u6210\u671F\u95F4\uFF0C\u4E3B\u8282\u70B9\u4ECD\u7136\u54CD\u5E94\u8BFB\u5199\u547D\u4EE4\uFF0C\u56E0\u6B64\u4E3B\u8282\u70B9\u4F1A\u628A\u8FD9\u671F\u95F4\u5199\u547D\u4EE4\u6570\u636E\u4FDD\u5B58\u5728\u590D\u5236\u5BA2\u6237\u7AEF\u7F13\u51B2\u533A\u5185\uFF0C\u5F53\u4ECE\u8282\u70B9\u52A0\u8F7D\u5B8CRDB\u6587\u4EF6\u540E\uFF0C\u4E3B\u8282\u70B9\u518D\u628A\u7F13\u51B2\u533A\u5185\u7684\u6570\u636E\u53D1\u9001\u7ED9\u4ECE\u8282\u70B9\uFF0C\u4FDD\u8BC1\u4E3B\u4ECE\u4E4B\u95F4\u6570\u636E\u4E00\u81F4\u6027\u3002</li><li>\u4ECE\u8282\u70B9\u63A5\u6536\u5B8C\u4E3B\u8282\u70B9\u4F20\u9001\u6765\u7684\u5168\u90E8\u6570\u636E\u540E\u4F1A\u6E05\u7A7A\u81EA\u8EAB\u65E7\u6570\u636E</li><li>\u4ECE\u8282\u70B9\u6E05\u7A7A\u6570\u636E\u540E\u5F00\u59CB\u52A0\u8F7DRDB\u6587\u4EF6</li><li>\u4ECE\u8282\u70B9\u6210\u529F\u52A0\u8F7D\u5B8CRDB\u540E\uFF0C\u5982\u679C\u5F53\u524D\u8282\u70B9\u5F00\u542F\u4E86AOF\u6301\u4E45\u5316\u529F\u80FD\uFF0C \u5B83\u4F1A\u7ACB\u523B\u505Abgrewriteaof\u64CD\u4F5C\uFF0C\u4E3A\u4E86\u4FDD\u8BC1\u5168\u91CF\u590D\u5236\u540EAOF\u6301\u4E45\u5316\u6587\u4EF6\u7ACB\u523B\u53EF\u7528\u3002</li></ol><p><strong>\u90E8\u5206\u590D\u5236</strong> \u90E8\u5206\u590D\u5236\u4E3B\u8981\u662FRedis\u9488\u5BF9\u5168\u91CF\u590D\u5236\u7684\u8FC7\u9AD8\u5F00\u9500\u505A\u51FA\u7684\u4E00\u79CD\u4F18\u5316\u63AA\u65BD\uFF0C \u4F7F\u7528psync{runId}{offset}\u547D\u4EE4\u5B9E\u73B0\u3002\u5F53\u4ECE\u8282\u70B9\uFF08slave\uFF09\u6B63\u5728\u590D\u5236\u4E3B\u8282\u70B9 \uFF08master\uFF09\u65F6\uFF0C\u5982\u679C\u51FA\u73B0\u7F51\u7EDC\u95EA\u65AD\u6216\u8005\u547D\u4EE4\u4E22\u5931\u7B49\u5F02\u5E38\u60C5\u51B5\u65F6\uFF0C\u4ECE\u8282\u70B9\u4F1A\u5411 \u4E3B\u8282\u70B9\u8981\u6C42\u8865\u53D1\u4E22\u5931\u7684\u547D\u4EE4\u6570\u636E\uFF0C\u5982\u679C\u4E3B\u8282\u70B9\u7684\u590D\u5236\u79EF\u538B\u7F13\u51B2\u533A\u5185\u5B58\u5728\u8FD9\u90E8\u5206\u6570\u636E\u5219\u76F4\u63A5\u53D1\u9001\u7ED9\u4ECE\u8282\u70B9\uFF0C\u8FD9\u6837\u5C31\u53EF\u4EE5\u4FDD\u6301\u4E3B\u4ECE\u8282\u70B9\u590D\u5236\u7684\u4E00\u81F4\u6027\u3002 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-87600c72-cc6a-4656-81b2-e71864c97f23.png" alt="\u90E8\u5206\u590D\u5236"></p><ol><li>\u5F53\u4E3B\u4ECE\u8282\u70B9\u4E4B\u95F4\u7F51\u7EDC\u51FA\u73B0\u4E2D\u65AD\u65F6\uFF0C\u5982\u679C\u8D85\u8FC7repl-timeout\u65F6\u95F4\uFF0C\u4E3B\u8282\u70B9\u4F1A\u8BA4\u4E3A\u4ECE\u8282\u70B9\u6545\u969C\u5E76\u4E2D\u65AD\u590D\u5236\u8FDE\u63A5</li><li>\u4E3B\u4ECE\u8FDE\u63A5\u4E2D\u65AD\u671F\u95F4\u4E3B\u8282\u70B9\u4F9D\u7136\u54CD\u5E94\u547D\u4EE4\uFF0C\u4F46\u56E0\u590D\u5236\u8FDE\u63A5\u4E2D\u65AD\u547D\u4EE4\u65E0\u6CD5\u53D1\u9001\u7ED9\u4ECE\u8282\u70B9\uFF0C\u4E0D\u8FC7\u4E3B\u8282\u70B9\u5185\u90E8\u5B58\u5728\u7684\u590D\u5236\u79EF\u538B\u7F13\u51B2\u533A\uFF0C\u4F9D\u7136\u53EF\u4EE5\u4FDD\u5B58\u6700\u8FD1\u4E00\u6BB5\u65F6\u95F4\u7684\u5199\u547D\u4EE4\u6570\u636E\uFF0C\u9ED8\u8BA4\u6700\u5927\u7F13\u5B581MB\u3002</li><li>\u5F53\u4E3B\u4ECE\u8282\u70B9\u7F51\u7EDC\u6062\u590D\u540E\uFF0C\u4ECE\u8282\u70B9\u4F1A\u518D\u6B21\u8FDE\u4E0A\u4E3B\u8282\u70B9</li><li>\u5F53\u4E3B\u4ECE\u8FDE\u63A5\u6062\u590D\u540E\uFF0C\u7531\u4E8E\u4ECE\u8282\u70B9\u4E4B\u524D\u4FDD\u5B58\u4E86\u81EA\u8EAB\u5DF2\u590D\u5236\u7684\u504F\u79FB\u91CF\u548C\u4E3B\u8282\u70B9\u7684\u8FD0\u884CID\u3002\u56E0\u6B64\u4F1A\u628A\u5B83\u4EEC\u5F53\u4F5Cpsync\u53C2\u6570\u53D1\u9001\u7ED9\u4E3B\u8282\u70B9\uFF0C\u8981\u6C42\u8FDB\u884C\u90E8\u5206\u590D\u5236\u64CD\u4F5C\u3002</li><li>\u4E3B\u8282\u70B9\u63A5\u5230psync\u547D\u4EE4\u540E\u9996\u5148\u6838\u5BF9\u53C2\u6570runId\u662F\u5426\u4E0E\u81EA\u8EAB\u4E00\u81F4\uFF0C\u5982\u679C\u4E00 \u81F4\uFF0C\u8BF4\u660E\u4E4B\u524D\u590D\u5236\u7684\u662F\u5F53\u524D\u4E3B\u8282\u70B9\uFF1B\u4E4B\u540E\u6839\u636E\u53C2\u6570offset\u5728\u81EA\u8EAB\u590D\u5236\u79EF\u538B\u7F13\u51B2\u533A\u67E5\u627E\uFF0C\u5982\u679C\u504F\u79FB\u91CF\u4E4B\u540E\u7684\u6570\u636E\u5B58\u5728\u7F13\u51B2\u533A\u4E2D\uFF0C\u5219\u5BF9\u4ECE\u8282\u70B9\u53D1\u9001+CONTINUE\u54CD\u5E94\uFF0C\u8868\u793A\u53EF\u4EE5\u8FDB\u884C\u90E8\u5206\u590D\u5236\u3002</li><li>\u4E3B\u8282\u70B9\u6839\u636E\u504F\u79FB\u91CF\u628A\u590D\u5236\u79EF\u538B\u7F13\u51B2\u533A\u91CC\u7684\u6570\u636E\u53D1\u9001\u7ED9\u4ECE\u8282\u70B9\uFF0C\u4FDD\u8BC1\u4E3B\u4ECE\u590D\u5236\u8FDB\u5165\u6B63\u5E38\u72B6\u6001\u3002</li></ol><h3 id="_17-\u4E3B\u4ECE\u590D\u5236\u5B58\u5728\u54EA\u4E9B\u95EE\u9898\u5462" tabindex="-1"><a class="header-anchor" href="#_17-\u4E3B\u4ECE\u590D\u5236\u5B58\u5728\u54EA\u4E9B\u95EE\u9898\u5462" aria-hidden="true">#</a> 17.\u4E3B\u4ECE\u590D\u5236\u5B58\u5728\u54EA\u4E9B\u95EE\u9898\u5462\uFF1F</h3><p>\u4E3B\u4ECE\u590D\u5236\u867D\u597D\uFF0C\u4F46\u4E5F\u5B58\u5728\u4E00\u4E9B\u95EE\u9898\uFF1A</p><ul><li>\u4E00\u65E6\u4E3B\u8282\u70B9\u51FA\u73B0\u6545\u969C\uFF0C\u9700\u8981\u624B\u52A8\u5C06\u4E00\u4E2A\u4ECE\u8282\u70B9\u664B\u5347\u4E3A\u4E3B\u8282\u70B9\uFF0C\u540C\u65F6\u9700\u8981\u4FEE\u6539\u5E94\u7528\u65B9\u7684\u4E3B\u8282\u70B9\u5730\u5740\uFF0C\u8FD8\u9700\u8981\u547D\u4EE4\u5176\u4ED6\u4ECE\u8282\u70B9\u53BB\u590D\u5236\u65B0\u7684\u4E3B\u8282\u70B9\uFF0C\u6574\u4E2A\u8FC7\u7A0B\u90FD\u9700\u8981\u4EBA\u5DE5\u5E72\u9884\u3002</li><li>\u4E3B\u8282\u70B9\u7684\u5199\u80FD\u529B\u53D7\u5230\u5355\u673A\u7684\u9650\u5236\u3002</li><li>\u4E3B\u8282\u70B9\u7684\u5B58\u50A8\u80FD\u529B\u53D7\u5230\u5355\u673A\u7684\u9650\u5236\u3002</li></ul><p>\u7B2C\u4E00\u4E2A\u95EE\u9898\u662FRedis\u7684\u9AD8\u53EF\u7528\u95EE\u9898\uFF0C\u7B2C\u4E8C\u3001\u4E09\u4E2A\u95EE\u9898\u5C5E\u4E8ERedis\u7684\u5206\u5E03\u5F0F\u95EE\u9898\u3002</p><h3 id="_18-redis-sentinel-\u54E8\u5175-\u4E86\u89E3\u5417" tabindex="-1"><a class="header-anchor" href="#_18-redis-sentinel-\u54E8\u5175-\u4E86\u89E3\u5417" aria-hidden="true">#</a> 18.Redis Sentinel\uFF08\u54E8\u5175\uFF09\u4E86\u89E3\u5417\uFF1F</h3><p>\u4E3B\u4ECE\u590D\u5236\u5B58\u5728\u4E00\u4E2A\u95EE\u9898\uFF0C\u6CA1\u6CD5\u5B8C\u6210\u81EA\u52A8\u6545\u969C\u8F6C\u79FB\u3002\u6240\u4EE5\u6211\u4EEC\u9700\u8981\u4E00\u4E2A\u65B9\u6848\u6765\u5B8C\u6210\u81EA\u52A8\u6545\u969C\u8F6C\u79FB\uFF0C\u5B83\u5C31\u662FRedis Sentinel\uFF08\u54E8\u5175\uFF09\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-8b1a055c-f077-49ff-9432-c194d4fc3639.png" alt="Redis Sentinel"></p><p>Redis Sentinel \uFF0C\u5B83\u7531\u4E24\u90E8\u5206\u7EC4\u6210\uFF0C\u54E8\u5175\u8282\u70B9\u548C\u6570\u636E\u8282\u70B9\uFF1A</p><ul><li><strong>\u54E8\u5175\u8282\u70B9\uFF1A</strong> \u54E8\u5175\u7CFB\u7EDF\u7531\u4E00\u4E2A\u6216\u591A\u4E2A\u54E8\u5175\u8282\u70B9\u7EC4\u6210\uFF0C\u54E8\u5175\u8282\u70B9\u662F\u7279\u6B8A\u7684 Redis \u8282\u70B9\uFF0C\u4E0D\u5B58\u50A8\u6570\u636E\uFF0C\u5BF9\u6570\u636E\u8282\u70B9\u8FDB\u884C\u76D1\u63A7\u3002</li><li><strong>\u6570\u636E\u8282\u70B9\uFF1A</strong> \u4E3B\u8282\u70B9\u548C\u4ECE\u8282\u70B9\u90FD\u662F\u6570\u636E\u8282\u70B9\uFF1B</li></ul><p>\u5728\u590D\u5236\u7684\u57FA\u7840\u4E0A\uFF0C\u54E8\u5175\u5B9E\u73B0\u4E86 <strong>\u81EA\u52A8\u5316\u7684\u6545\u969C\u6062\u590D</strong> \u529F\u80FD\uFF0C\u4E0B\u9762\u662F\u5B98\u65B9\u5BF9\u4E8E\u54E8\u5175\u529F\u80FD\u7684\u63CF\u8FF0\uFF1A</p><ul><li><strong>\u76D1\u63A7\uFF08Monitoring\uFF09\uFF1A</strong> \u54E8\u5175\u4F1A\u4E0D\u65AD\u5730\u68C0\u67E5\u4E3B\u8282\u70B9\u548C\u4ECE\u8282\u70B9\u662F\u5426\u8FD0\u4F5C\u6B63\u5E38\u3002</li><li><strong>\u81EA\u52A8\u6545\u969C\u8F6C\u79FB\uFF08Automatic failover\uFF09\uFF1A</strong> \u5F53 <strong>\u4E3B\u8282\u70B9</strong> \u4E0D\u80FD\u6B63\u5E38\u5DE5\u4F5C\u65F6\uFF0C\u54E8\u5175\u4F1A\u5F00\u59CB <strong>\u81EA\u52A8\u6545\u969C\u8F6C\u79FB\u64CD\u4F5C</strong>\uFF0C\u5B83\u4F1A\u5C06\u5931\u6548\u4E3B\u8282\u70B9\u7684\u5176\u4E2D\u4E00\u4E2A <strong>\u4ECE\u8282\u70B9\u5347\u7EA7\u4E3A\u65B0\u7684\u4E3B\u8282\u70B9</strong>\uFF0C\u5E76\u8BA9\u5176\u4ED6\u4ECE\u8282\u70B9\u6539\u4E3A\u590D\u5236\u65B0\u7684\u4E3B\u8282\u70B9\u3002</li><li><strong>\u914D\u7F6E\u63D0\u4F9B\u8005\uFF08Configuration provider\uFF09\uFF1A</strong> \u5BA2\u6237\u7AEF\u5728\u521D\u59CB\u5316\u65F6\uFF0C\u901A\u8FC7\u8FDE\u63A5\u54E8\u5175\u6765\u83B7\u5F97\u5F53\u524D Redis \u670D\u52A1\u7684\u4E3B\u8282\u70B9\u5730\u5740\u3002</li><li><strong>\u901A\u77E5\uFF08Notification\uFF09\uFF1A</strong> \u54E8\u5175\u53EF\u4EE5\u5C06\u6545\u969C\u8F6C\u79FB\u7684\u7ED3\u679C\u53D1\u9001\u7ED9\u5BA2\u6237\u7AEF\u3002</li></ul><p>\u5176\u4E2D\uFF0C\u76D1\u63A7\u548C\u81EA\u52A8\u6545\u969C\u8F6C\u79FB\u529F\u80FD\uFF0C\u4F7F\u5F97\u54E8\u5175\u53EF\u4EE5\u53CA\u65F6\u53D1\u73B0\u4E3B\u8282\u70B9\u6545\u969C\u5E76\u5B8C\u6210\u8F6C\u79FB\u3002\u800C\u914D\u7F6E\u63D0\u4F9B\u8005\u548C\u901A\u77E5\u529F\u80FD\uFF0C\u5219\u9700\u8981\u5728\u4E0E\u5BA2\u6237\u7AEF\u7684\u4EA4\u4E92\u4E2D\u624D\u80FD\u4F53\u73B0\u3002</p><h3 id="_19-redis-sentinel-\u54E8\u5175-\u5B9E\u73B0\u539F\u7406\u77E5\u9053\u5417" tabindex="-1"><a class="header-anchor" href="#_19-redis-sentinel-\u54E8\u5175-\u5B9E\u73B0\u539F\u7406\u77E5\u9053\u5417" aria-hidden="true">#</a> 19.Redis Sentinel\uFF08\u54E8\u5175\uFF09\u5B9E\u73B0\u539F\u7406\u77E5\u9053\u5417\uFF1F</h3><p>\u54E8\u5175\u6A21\u5F0F\u662F\u901A\u8FC7\u54E8\u5175\u8282\u70B9\u5B8C\u6210\u5BF9\u6570\u636E\u8282\u70B9\u7684\u76D1\u63A7\u3001\u4E0B\u7EBF\u3001\u6545\u969C\u8F6C\u79FB\u3002 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-4074d72a-886a-4892-8f55-80112005aad8.png" alt="Redis Sentinel\u5DE5\u4F5C\u6D41\u7A0B"></p><ul><li><strong>\u5B9A\u65F6\u76D1\u63A7</strong><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-e7708f8d-ef34-4255-b5d0-cb300c649716.png" alt="\u4E09\u4E2A\u5B9A\u65F6\u4EFB\u52A1">Redis Sentinel\u901A\u8FC7\u4E09\u4E2A\u5B9A\u65F6\u76D1\u63A7\u4EFB\u52A1\u5B8C\u6210\u5BF9\u5404\u4E2A\u8282\u70B9\u53D1\u73B0\u548C\u76D1\u63A7\uFF1A <ol><li>\u6BCF\u969410\u79D2\uFF0C\u6BCF\u4E2ASentinel\u8282\u70B9\u4F1A\u5411\u4E3B\u8282\u70B9\u548C\u4ECE\u8282\u70B9\u53D1\u9001info\u547D\u4EE4\u83B7\u53D6\u6700\u65B0\u7684\u62D3\u6251\u7ED3\u6784</li><li>\u6BCF\u96942\u79D2\uFF0C\u6BCF\u4E2ASentinel\u8282\u70B9\u4F1A\u5411Redis\u6570\u636E\u8282\u70B9\u7684__sentinel__\uFF1Ahello \u9891\u9053\u4E0A\u53D1\u9001\u8BE5Sentinel\u8282\u70B9\u5BF9\u4E8E\u4E3B\u8282\u70B9\u7684\u5224\u65AD\u4EE5\u53CA\u5F53\u524DSentinel\u8282\u70B9\u7684\u4FE1\u606F</li><li>\u6BCF\u96941\u79D2\uFF0C\u6BCF\u4E2ASentinel\u8282\u70B9\u4F1A\u5411\u4E3B\u8282\u70B9\u3001\u4ECE\u8282\u70B9\u3001\u5176\u4F59Sentinel\u8282\u70B9\u53D1\u9001\u4E00\u6761ping\u547D\u4EE4\u505A\u4E00\u6B21\u5FC3\u8DF3\u68C0\u6D4B\uFF0C\u6765\u786E\u8BA4\u8FD9\u4E9B\u8282\u70B9\u5F53\u524D\u662F\u5426\u53EF\u8FBE</li></ol></li><li><strong>\u4E3B\u89C2\u4E0B\u7EBF\u548C\u5BA2\u89C2\u4E0B\u7EBF</strong> \u4E3B\u89C2\u4E0B\u7EBF\u5C31\u662F\u54E8\u5175\u8282\u70B9\u8BA4\u4E3A\u67D0\u4E2A\u8282\u70B9\u6709\u95EE\u9898\uFF0C\u5BA2\u89C2\u4E0B\u7EBF\u5C31\u662F\u8D85\u8FC7\u4E00\u5B9A\u6570\u91CF\u7684\u54E8\u5175\u8282\u70B9\u8BA4\u4E3A\u4E3B\u8282\u70B9\u6709\u95EE\u9898\u3002 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-11839a24-9249-48a5-8c9d-888aa80d91dc.png" alt="\u4E3B\u89C2\u4E0B\u7EBF\u548C\u5BA2\u89C2\u4E0B\u7EBF"></li></ul><ol><li><p>\u4E3B\u89C2\u4E0B\u7EBF \u6BCF\u4E2ASentinel\u8282\u70B9\u4F1A\u6BCF\u96941\u79D2\u5BF9\u4E3B\u8282\u70B9\u3001\u4ECE\u8282\u70B9\u3001\u5176\u4ED6Sentinel\u8282\u70B9\u53D1\u9001ping\u547D\u4EE4\u505A\u5FC3\u8DF3\u68C0\u6D4B\uFF0C\u5F53\u8FD9\u4E9B\u8282\u70B9\u8D85\u8FC7 down-after-milliseconds\u6CA1\u6709\u8FDB\u884C\u6709\u6548\u56DE\u590D\uFF0CSentinel\u8282\u70B9\u5C31\u4F1A\u5BF9\u8BE5\u8282\u70B9\u505A\u5931\u8D25\u5224\u5B9A\uFF0C\u8FD9\u4E2A\u884C\u4E3A\u53EB\u505A\u4E3B\u89C2\u4E0B\u7EBF\u3002</p></li><li><p>\u5BA2\u89C2\u4E0B\u7EBF \u5F53Sentinel\u4E3B\u89C2\u4E0B\u7EBF\u7684\u8282\u70B9\u662F\u4E3B\u8282\u70B9\u65F6\uFF0C\u8BE5Sentinel\u8282\u70B9\u4F1A\u901A\u8FC7sentinel is- master-down-by-addr\u547D\u4EE4\u5411\u5176\u4ED6Sentinel\u8282\u70B9\u8BE2\u95EE\u5BF9\u4E3B\u8282\u70B9\u7684\u5224\u65AD\uFF0C\u5F53\u8D85\u8FC7 &lt;quorum&gt;\u4E2A\u6570\uFF0CSentinel\u8282\u70B9\u8BA4\u4E3A\u4E3B\u8282\u70B9\u786E\u5B9E\u6709\u95EE\u9898\uFF0C\u8FD9\u65F6\u8BE5Sentinel\u8282\u70B9\u4F1A\u505A\u51FA\u5BA2\u89C2\u4E0B\u7EBF\u7684\u51B3\u5B9A</p></li></ol><ul><li><p><strong>\u9886\u5BFC\u8005Sentinel\u8282\u70B9\u9009\u4E3E</strong> Sentinel\u8282\u70B9\u4E4B\u95F4\u4F1A\u505A\u4E00\u4E2A\u9886\u5BFC\u8005\u9009\u4E3E\u7684\u5DE5\u4F5C\uFF0C\u9009\u51FA\u4E00\u4E2ASentinel\u8282\u70B9\u4F5C\u4E3A\u9886\u5BFC\u8005\u8FDB\u884C\u6545\u969C\u8F6C\u79FB\u7684\u5DE5\u4F5C\u3002Redis\u4F7F\u7528\u4E86Raft\u7B97\u6CD5\u5B9E\u73B0\u9886\u5BFC\u8005\u9009\u4E3E\u3002</p></li><li><p><strong>\u6545\u969C\u8F6C\u79FB</strong></p><p>\u9886\u5BFC\u8005\u9009\u4E3E\u51FA\u7684Sentinel\u8282\u70B9\u8D1F\u8D23\u6545\u969C\u8F6C\u79FB\uFF0C\u8FC7\u7A0B\u5982\u4E0B\uFF1A <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-0618a5e2-e94f-40d7-888a-e78019ba8f93.png" alt="\u6545\u969C\u8F6C\u79FB"></p><ol><li>\u5728\u4ECE\u8282\u70B9\u5217\u8868\u4E2D\u9009\u51FA\u4E00\u4E2A\u8282\u70B9\u4F5C\u4E3A\u65B0\u7684\u4E3B\u8282\u70B9\uFF0C\u8FD9\u4E00\u6B65\u662F\u76F8\u5BF9\u590D\u6742\u4E00\u4E9B\u7684\u4E00\u6B65</li><li>Sentinel\u9886\u5BFC\u8005\u8282\u70B9\u4F1A\u5BF9\u7B2C\u4E00\u6B65\u9009\u51FA\u6765\u7684\u4ECE\u8282\u70B9\u6267\u884Cslaveof no one\u547D\u4EE4\u8BA9\u5176\u6210\u4E3A\u4E3B\u8282\u70B9</li><li>Sentinel\u9886\u5BFC\u8005\u8282\u70B9\u4F1A\u5411\u5269\u4F59\u7684\u4ECE\u8282\u70B9\u53D1\u9001\u547D\u4EE4\uFF0C\u8BA9\u5B83\u4EEC\u6210\u4E3A\u65B0\u4E3B\u8282\u70B9\u7684\u4ECE\u8282\u70B9</li><li>Sentinel\u8282\u70B9\u96C6\u5408\u4F1A\u5C06\u539F\u6765\u7684\u4E3B\u8282\u70B9\u66F4\u65B0\u4E3A\u4ECE\u8282\u70B9\uFF0C\u5E76\u4FDD\u6301\u7740\u5BF9\u5176\u5173\u6CE8\uFF0C\u5F53\u5176\u6062\u590D\u540E\u547D\u4EE4\u5B83\u53BB\u590D\u5236\u65B0\u7684\u4E3B\u8282\u70B9</li></ol></li></ul><h3 id="_20-\u9886\u5BFC\u8005sentinel\u8282\u70B9\u9009\u4E3E\u4E86\u89E3\u5417" tabindex="-1"><a class="header-anchor" href="#_20-\u9886\u5BFC\u8005sentinel\u8282\u70B9\u9009\u4E3E\u4E86\u89E3\u5417" aria-hidden="true">#</a> 20.\u9886\u5BFC\u8005Sentinel\u8282\u70B9\u9009\u4E3E\u4E86\u89E3\u5417\uFF1F</h3><p>Redis\u4F7F\u7528\u4E86Raft\u7B97\u6CD5\u5B9E \u73B0\u9886\u5BFC\u8005\u9009\u4E3E\uFF0C\u5927\u81F4\u6D41\u7A0B\u5982\u4E0B\uFF1A <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-6586ae3c-6b33-4c9f-8137-f02fc0e6cfae.png" alt="\u9886\u5BFC\u8005Sentinel\u8282\u70B9\u9009\u4E3E"></p><ol><li>\u6BCF\u4E2A\u5728\u7EBF\u7684Sentinel\u8282\u70B9\u90FD\u6709\u8D44\u683C\u6210\u4E3A\u9886\u5BFC\u8005\uFF0C\u5F53\u5B83\u786E\u8BA4\u4E3B\u8282\u70B9\u4E3B\u89C2 \u4E0B\u7EBF\u65F6\u5019\uFF0C\u4F1A\u5411\u5176\u4ED6Sentinel\u8282\u70B9\u53D1\u9001sentinel is-master-down-by-addr\u547D\u4EE4\uFF0C \u8981\u6C42\u5C06\u81EA\u5DF1\u8BBE\u7F6E\u4E3A\u9886\u5BFC\u8005\u3002</li><li>\u6536\u5230\u547D\u4EE4\u7684Sentinel\u8282\u70B9\uFF0C\u5982\u679C\u6CA1\u6709\u540C\u610F\u8FC7\u5176\u4ED6Sentinel\u8282\u70B9\u7684sentinel is-master-down-by-addr\u547D\u4EE4\uFF0C\u5C06\u540C\u610F\u8BE5\u8BF7\u6C42\uFF0C\u5426\u5219\u62D2\u7EDD\u3002</li><li>\u5982\u679C\u8BE5Sentinel\u8282\u70B9\u53D1\u73B0\u81EA\u5DF1\u7684\u7968\u6570\u5DF2\u7ECF\u5927\u4E8E\u7B49\u4E8Emax\uFF08quorum\uFF0C num\uFF08sentinels\uFF09/2+1\uFF09\uFF0C\u90A3\u4E48\u5B83\u5C06\u6210\u4E3A\u9886\u5BFC\u8005\u3002</li><li>\u5982\u679C\u6B64\u8FC7\u7A0B\u6CA1\u6709\u9009\u4E3E\u51FA\u9886\u5BFC\u8005\uFF0C\u5C06\u8FDB\u5165\u4E0B\u4E00\u6B21\u9009\u4E3E\u3002</li></ol><h3 id="_21-\u65B0\u7684\u4E3B\u8282\u70B9\u662F\u600E\u6837\u88AB\u6311\u9009\u51FA\u6765\u7684" tabindex="-1"><a class="header-anchor" href="#_21-\u65B0\u7684\u4E3B\u8282\u70B9\u662F\u600E\u6837\u88AB\u6311\u9009\u51FA\u6765\u7684" aria-hidden="true">#</a> 21.\u65B0\u7684\u4E3B\u8282\u70B9\u662F\u600E\u6837\u88AB\u6311\u9009\u51FA\u6765\u7684\uFF1F</h3><p>\u9009\u51FA\u65B0\u7684\u4E3B\u8282\u70B9\uFF0C\u5927\u6982\u5206\u4E3A\u8FD9\u4E48\u51E0\u6B65\uFF1A <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-03976d35-20b6-4efe-aa9c-7d3759460d34.png" alt="\u65B0\u7684\u4E3B\u8282\u70B9"></p><ol><li>\u8FC7\u6EE4\uFF1A\u201C\u4E0D\u5065\u5EB7\u201D\uFF08\u4E3B\u89C2\u4E0B\u7EBF\u3001\u65AD\u7EBF\uFF09\u30015\u79D2\u5185\u6CA1\u6709\u56DE\u590D\u8FC7Sentinel\u8282 \u70B9ping\u54CD\u5E94\u3001\u4E0E\u4E3B\u8282\u70B9\u5931\u8054\u8D85\u8FC7down-after-milliseconds*10\u79D2\u3002</li><li>\u9009\u62E9slave-priority\uFF08\u4ECE\u8282\u70B9\u4F18\u5148\u7EA7\uFF09\u6700\u9AD8\u7684\u4ECE\u8282\u70B9\u5217\u8868\uFF0C\u5982\u679C\u5B58\u5728\u5219\u8FD4\u56DE\uFF0C\u4E0D\u5B58\u5728\u5219\u7EE7\u7EED\u3002</li><li>\u9009\u62E9\u590D\u5236\u504F\u79FB\u91CF\u6700\u5927\u7684\u4ECE\u8282\u70B9\uFF08\u590D\u5236\u7684\u6700\u5B8C\u6574\uFF09\uFF0C\u5982\u679C\u5B58\u5728\u5219\u8FD4 \u56DE\uFF0C\u4E0D\u5B58\u5728\u5219\u7EE7\u7EED\u3002</li><li>\u9009\u62E9runid\u6700\u5C0F\u7684\u4ECE\u8282\u70B9\u3002</li></ol><h3 id="_22-redis-\u96C6\u7FA4\u4E86\u89E3\u5417" tabindex="-1"><a class="header-anchor" href="#_22-redis-\u96C6\u7FA4\u4E86\u89E3\u5417" aria-hidden="true">#</a> 22.Redis \u96C6\u7FA4\u4E86\u89E3\u5417\uFF1F</h3><p>\u524D\u9762\u8BF4\u5230\u4E86\u4E3B\u4ECE\u5B58\u5728\u9AD8\u53EF\u7528\u548C\u5206\u5E03\u5F0F\u7684\u95EE\u9898\uFF0C\u54E8\u5175\u89E3\u51B3\u4E86\u9AD8\u53EF\u7528\u7684\u95EE\u9898\uFF0C\u800C\u96C6\u7FA4\u5C31\u662F\u7EC8\u6781\u65B9\u6848\uFF0C\u4E00\u4E3E\u89E3\u51B3\u9AD8\u53EF\u7528\u548C\u5206\u5E03\u5F0F\u95EE\u9898\u3002 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-5cbc6009-251e-4d5b-8f22-8d543938eccb.png" alt="Redis \u96C6\u7FA4\u793A\u610F\u56FE"></p><ol><li><p><strong>\u6570\u636E\u5206\u533A\uFF1A</strong> \u6570\u636E\u5206\u533A <em>(\u6216\u79F0\u6570\u636E\u5206\u7247)</em> \u662F\u96C6\u7FA4\u6700\u6838\u5FC3\u7684\u529F\u80FD\u3002\u96C6\u7FA4\u5C06\u6570\u636E\u5206\u6563\u5230\u591A\u4E2A\u8282\u70B9\uFF0C\u4E00\u65B9\u9762 \u7A81\u7834\u4E86 Redis \u5355\u673A\u5185\u5B58\u5927\u5C0F\u7684\u9650\u5236\uFF0C<strong>\u5B58\u50A8\u5BB9\u91CF\u5927\u5927\u589E\u52A0</strong>\uFF1B<strong>\u53E6\u4E00\u65B9\u9762</strong> \u6BCF\u4E2A\u4E3B\u8282\u70B9\u90FD\u53EF\u4EE5\u5BF9\u5916\u63D0\u4F9B\u8BFB\u670D\u52A1\u548C\u5199\u670D\u52A1\uFF0C<strong>\u5927\u5927\u63D0\u9AD8\u4E86\u96C6\u7FA4\u7684\u54CD\u5E94\u80FD\u529B</strong>\u3002</p></li><li><p><strong>\u9AD8\u53EF\u7528\uFF1A</strong> \u96C6\u7FA4\u652F\u6301\u4E3B\u4ECE\u590D\u5236\u548C\u4E3B\u8282\u70B9\u7684 <strong>\u81EA\u52A8\u6545\u969C\u8F6C\u79FB</strong> <em>\uFF08\u4E0E\u54E8\u5175\u7C7B\u4F3C\uFF09</em>\uFF0C\u5F53\u4EFB\u4E00\u8282\u70B9\u53D1\u751F\u6545\u969C\u65F6\uFF0C\u96C6\u7FA4\u4ECD\u7136\u53EF\u4EE5\u5BF9\u5916\u63D0\u4F9B\u670D\u52A1\u3002</p></li></ol><h3 id="_23-\u96C6\u7FA4\u4E2D\u6570\u636E\u5982\u4F55\u5206\u533A" tabindex="-1"><a class="header-anchor" href="#_23-\u96C6\u7FA4\u4E2D\u6570\u636E\u5982\u4F55\u5206\u533A" aria-hidden="true">#</a> 23.\u96C6\u7FA4\u4E2D\u6570\u636E\u5982\u4F55\u5206\u533A\uFF1F</h3><p>\u5206\u5E03\u5F0F\u7684\u5B58\u50A8\u4E2D\uFF0C\u8981\u628A\u6570\u636E\u96C6\u6309\u7167\u5206\u533A\u89C4\u5219\u6620\u5C04\u5230\u591A\u4E2A\u8282\u70B9\uFF0C\u5E38\u89C1\u7684\u6570\u636E\u5206\u533A\u89C4\u5219\u4E09\u79CD\uFF1A <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-ceb49e41-dfd7-4d1e-91f9-c299437227d2.png" alt="\u5206\u5E03\u5F0F\u6570\u636E\u5206\u533A"></p><h5 id="\u65B9\u6848\u4E00-\u8282\u70B9\u53D6\u4F59\u5206\u533A" tabindex="-1"><a class="header-anchor" href="#\u65B9\u6848\u4E00-\u8282\u70B9\u53D6\u4F59\u5206\u533A" aria-hidden="true">#</a> \u65B9\u6848\u4E00\uFF1A\u8282\u70B9\u53D6\u4F59\u5206\u533A</h5><p>\u8282\u70B9\u53D6\u4F59\u5206\u533A\uFF0C\u975E\u5E38\u597D\u7406\u89E3\uFF0C\u4F7F\u7528\u7279\u5B9A\u7684\u6570\u636E\uFF0C\u6BD4\u5982Redis\u7684\u952E\uFF0C\u6216\u8005\u7528\u6237ID\u4E4B\u7C7B\uFF0C\u5BF9\u54CD\u5E94\u7684hash\u503C\u53D6\u4F59\uFF1Ahash\uFF08key\uFF09%N\uFF0C\u6765\u786E\u5B9A\u6570\u636E\u6620\u5C04\u5230\u54EA\u4E00\u4E2A\u8282\u70B9\u4E0A\u3002</p><p>\u4E0D\u8FC7\u8BE5\u65B9\u6848\u6700\u5927\u7684\u95EE\u9898\u662F\uFF0C\u5F53\u8282\u70B9\u6570\u91CF\u53D8\u5316\u65F6\uFF0C\u5982\u6269\u5BB9\u6216\u6536\u7F29\u8282\u70B9\uFF0C\u6570\u636E\u8282\u70B9\u6620\u5C04\u5173 \u7CFB\u9700\u8981\u91CD\u65B0\u8BA1\u7B97\uFF0C\u4F1A\u5BFC\u81F4\u6570\u636E\u7684\u91CD\u65B0\u8FC1\u79FB\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-8b1fcaec-37e6-420a-9ca2-03615232af17.png" alt="\u8282\u70B9\u53D6\u4F59\u5206\u533A"></p><h5 id="\u65B9\u6848\u4E8C-\u4E00\u81F4\u6027\u54C8\u5E0C\u5206\u533A" tabindex="-1"><a class="header-anchor" href="#\u65B9\u6848\u4E8C-\u4E00\u81F4\u6027\u54C8\u5E0C\u5206\u533A" aria-hidden="true">#</a> \u65B9\u6848\u4E8C\uFF1A\u4E00\u81F4\u6027\u54C8\u5E0C\u5206\u533A</h5><p>\u5C06\u6574\u4E2A Hash \u503C\u7A7A\u95F4\u7EC4\u7EC7\u6210\u4E00\u4E2A\u865A\u62DF\u7684\u5706\u73AF\uFF0C\u7136\u540E\u5C06\u7F13\u5B58\u8282\u70B9\u7684 IP \u5730\u5740\u6216\u8005\u4E3B\u673A\u540D\u505A Hash \u53D6\u503C\u540E\uFF0C\u653E\u7F6E\u5728\u8FD9\u4E2A\u5706\u73AF\u4E0A\u3002\u5F53\u6211\u4EEC\u9700\u8981\u786E\u5B9A\u67D0\u4E00\u4E2A Key \u9700 \u8981\u5B58\u53D6\u5230\u54EA\u4E2A\u8282\u70B9\u4E0A\u7684\u65F6\u5019\uFF0C\u5148\u5BF9\u8FD9\u4E2A Key \u505A\u540C\u6837\u7684 Hash \u53D6\u503C\uFF0C\u786E\u5B9A\u5728\u73AF\u4E0A\u7684\u4F4D\u7F6E\uFF0C\u7136\u540E\u6309\u7167\u987A\u65F6\u9488\u65B9\u5411\u5728\u73AF\u4E0A\u201C\u884C\u8D70\u201D\uFF0C\u9047\u5230\u7684\u7B2C\u4E00\u4E2A\u7F13\u5B58\u8282\u70B9\u5C31\u662F\u8981\u8BBF\u95EE\u7684\u8282\u70B9\u3002</p><p>\u6BD4\u5982\u8BF4\u4E0B\u9762 \u8FD9\u5F20\u56FE\u91CC\u9762\uFF0CKey 1 \u548C Key 2 \u4F1A\u843D\u5165\u5230 Node 1 \u4E2D\uFF0CKey 3\u3001Key 4 \u4F1A\u843D\u5165\u5230 Node 2 \u4E2D\uFF0CKey 5 \u843D\u5165\u5230 Node 3 \u4E2D\uFF0CKey 6 \u843D\u5165\u5230 Node 4 \u4E2D\u3002 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-89bd1c1c-251c-4f53-bba3-fe945b2ae9e2.png" alt="\u4E00\u81F4\u6027\u54C8\u5E0C\u5206\u533A"></p><p>\u8FD9\u79CD\u65B9\u5F0F\u76F8\u6BD4\u8282\u70B9\u53D6\u4F59\u6700\u5927\u7684\u597D\u5904\u5728\u4E8E\u52A0\u5165\u548C\u5220\u9664\u8282\u70B9\u53EA\u5F71\u54CD\u54C8\u5E0C\u73AF\u4E2D \u76F8\u90BB\u7684\u8282\u70B9\uFF0C\u5BF9\u5176\u4ED6\u8282\u70B9\u65E0\u5F71\u54CD\u3002</p><p>\u4F46\u5B83\u8FD8\u662F\u5B58\u5728\u95EE\u9898\uFF1A</p><ul><li>\u7F13\u5B58\u8282\u70B9\u5728\u5706\u73AF\u4E0A\u5206\u5E03\u4E0D\u5E73\u5747\uFF0C\u4F1A\u9020\u6210\u90E8\u5206\u7F13\u5B58\u8282\u70B9\u7684\u538B\u529B\u8F83\u5927</li><li>\u5F53\u67D0\u4E2A\u8282\u70B9\u6545\u969C\u65F6\uFF0C\u8FD9\u4E2A\u8282\u70B9\u6240\u8981\u627F\u62C5\u7684\u6240\u6709\u8BBF\u95EE\u90FD\u4F1A\u88AB\u987A\u79FB\u5230\u53E6\u4E00\u4E2A\u8282\u70B9\u4E0A\uFF0C\u4F1A\u5BF9\u540E\u9762\u8FD9\u4E2A\u8282\u70B9\u9020\u6210\u529B\u3002</li></ul><h5 id="\u65B9\u6848\u4E09-\u865A\u62DF\u69FD\u5206\u533A" tabindex="-1"><a class="header-anchor" href="#\u65B9\u6848\u4E09-\u865A\u62DF\u69FD\u5206\u533A" aria-hidden="true">#</a> \u65B9\u6848\u4E09\uFF1A\u865A\u62DF\u69FD\u5206\u533A</h5><p>\u8FD9\u4E2A\u65B9\u6848 \u4E00\u81F4\u6027\u54C8\u5E0C\u5206\u533A\u7684\u57FA\u7840\u4E0A\uFF0C\u5F15\u5165\u4E86 <strong>\u865A\u62DF\u8282\u70B9</strong> \u7684\u6982\u5FF5\u3002Redis \u96C6\u7FA4\u4F7F\u7528\u7684\u4FBF\u662F\u8BE5\u65B9\u6848\uFF0C\u5176\u4E2D\u7684\u865A\u62DF\u8282\u70B9\u79F0\u4E3A <strong>\u69FD\uFF08slot\uFF09</strong>\u3002\u69FD\u662F\u4ECB\u4E8E\u6570\u636E\u548C\u5B9E\u9645\u8282\u70B9\u4E4B\u95F4\u7684\u865A\u62DF\u6982\u5FF5\uFF0C\u6BCF\u4E2A\u5B9E\u9645\u8282\u70B9\u5305\u542B\u4E00\u5B9A\u6570\u91CF\u7684\u69FD\uFF0C\u6BCF\u4E2A\u69FD\u5305\u542B\u54C8\u5E0C\u503C\u5728\u4E00\u5B9A\u8303\u56F4\u5185\u7684\u6570\u636E\u3002 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-e0ed9d62-3406-40db-8b01-c931f1020612.png" alt="\u865A\u62DF\u69FD\u5206\u914D"></p><p>\u5728\u4F7F\u7528\u4E86\u69FD\u7684\u4E00\u81F4\u6027\u54C8\u5E0C\u5206\u533A\u4E2D\uFF0C\u69FD\u662F\u6570\u636E\u7BA1\u7406\u548C\u8FC1\u79FB\u7684\u57FA\u672C\u5355\u4F4D\u3002\u69FD\u89E3\u8026\u4E86\u6570\u636E\u548C\u5B9E\u9645\u8282\u70B9 \u4E4B\u95F4\u7684\u5173\u7CFB\uFF0C\u589E\u52A0\u6216\u5220\u9664\u8282\u70B9\u5BF9\u7CFB\u7EDF\u7684\u5F71\u54CD\u5F88\u5C0F\u3002\u4ECD\u4EE5\u4E0A\u56FE\u4E3A\u4F8B\uFF0C\u7CFB\u7EDF\u4E2D\u6709 <code>4</code> \u4E2A\u5B9E\u9645\u8282\u70B9\uFF0C\u5047\u8BBE\u4E3A\u5176\u5206\u914D <code>16</code> \u4E2A\u69FD(0-15)\uFF1B</p><ul><li>\u69FD 0-3 \u4F4D\u4E8E node1\uFF1B4-7 \u4F4D\u4E8E node2\uFF1B\u4EE5\u6B64\u7C7B\u63A8....</li></ul><p>\u5982\u679C\u6B64\u65F6\u5220\u9664 <code>node2</code>\uFF0C\u53EA\u9700\u8981\u5C06\u69FD 4-7 \u91CD\u65B0\u5206\u914D\u5373\u53EF\uFF0C\u4F8B\u5982\u69FD 4-5 \u5206\u914D\u7ED9 <code>node1</code>\uFF0C\u69FD 6 \u5206\u914D\u7ED9 <code>node3</code>\uFF0C\u69FD 7 \u5206\u914D\u7ED9 <code>node4</code>\uFF0C\u6570\u636E\u5728\u5176\u4ED6\u8282\u70B9\u7684\u5206\u5E03\u4ECD\u7136\u8F83\u4E3A\u5747\u8861\u3002</p><h3 id="_24-\u80FD\u8BF4\u8BF4redis\u96C6\u7FA4\u7684\u539F\u7406\u5417" tabindex="-1"><a class="header-anchor" href="#_24-\u80FD\u8BF4\u8BF4redis\u96C6\u7FA4\u7684\u539F\u7406\u5417" aria-hidden="true">#</a> 24.\u80FD\u8BF4\u8BF4Redis\u96C6\u7FA4\u7684\u539F\u7406\u5417\uFF1F</h3><p>Redis\u96C6\u7FA4\u901A\u8FC7\u6570\u636E\u5206\u533A\u6765\u5B9E\u73B0\u6570\u636E\u7684\u5206\u5E03\u5F0F\u5B58\u50A8\uFF0C\u901A\u8FC7\u81EA\u52A8\u6545\u969C\u8F6C\u79FB\u5B9E\u73B0\u9AD8\u53EF\u7528\u3002</p><h5 id="\u96C6\u7FA4\u521B\u5EFA" tabindex="-1"><a class="header-anchor" href="#\u96C6\u7FA4\u521B\u5EFA" aria-hidden="true">#</a> \u96C6\u7FA4\u521B\u5EFA</h5><p>\u6570\u636E\u5206\u533A\u662F\u5728\u96C6\u7FA4\u521B\u5EFA\u7684\u65F6\u5019\u5B8C\u6210\u7684\u3002 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-046a512c-baab-4e3a-9409-2af58088cceb.png" alt="\u96C6\u7FA4\u521B\u5EFA"></p><p><strong>\u8BBE\u7F6E\u8282\u70B9</strong> Redis\u96C6\u7FA4\u4E00\u822C\u7531\u591A\u4E2A\u8282\u70B9\u7EC4\u6210\uFF0C\u8282\u70B9\u6570\u91CF\u81F3\u5C11\u4E3A6\u4E2A\u624D\u80FD\u4FDD\u8BC1\u7EC4\u6210\u5B8C\u6574\u9AD8\u53EF\u7528\u7684\u96C6\u7FA4\u3002\u6BCF\u4E2A\u8282\u70B9\u9700\u8981\u5F00\u542F\u914D\u7F6Ecluster-enabled yes\uFF0C\u8BA9Redis\u8FD0\u884C\u5728\u96C6\u7FA4\u6A21\u5F0F\u4E0B\u3002 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-e6064ba6-fd6f-4270-92f9-68c0bb98fd4b.png" alt="\u8282\u70B9\u548C\u63E1\u624B"><strong>\u8282\u70B9\u63E1\u624B</strong> \u8282\u70B9\u63E1\u624B\u662F\u6307\u4E00\u6279\u8FD0\u884C\u5728\u96C6\u7FA4\u6A21\u5F0F\u4E0B\u7684\u8282\u70B9\u901A\u8FC7Gossip\u534F\u8BAE\u5F7C\u6B64\u901A\u4FE1\uFF0C \u8FBE\u5230\u611F\u77E5\u5BF9\u65B9\u7684\u8FC7\u7A0B\u3002\u8282\u70B9\u63E1\u624B\u662F\u96C6\u7FA4\u5F7C\u6B64\u901A\u4FE1\u7684\u7B2C\u4E00\u6B65\uFF0C\u7531\u5BA2\u6237\u7AEF\u53D1\u8D77\u547D \u4EE4\uFF1Acluster meet{ip}{port}\u3002\u5B8C\u6210\u8282\u70B9\u63E1\u624B\u4E4B\u540E\uFF0C\u4E00\u4E2A\u4E2A\u7684Redis\u8282\u70B9\u5C31\u7EC4\u6210\u4E86\u4E00\u4E2A\u591A\u8282\u70B9\u7684\u96C6\u7FA4\u3002</p><p><strong>\u5206\u914D\u69FD\uFF08slot\uFF09</strong> Redis\u96C6\u7FA4\u628A\u6240\u6709\u7684\u6570\u636E\u6620\u5C04\u523016384\u4E2A\u69FD\u4E2D\u3002\u6BCF\u4E2A\u8282\u70B9\u5BF9\u5E94\u82E5\u5E72\u4E2A\u69FD\uFF0C\u53EA\u6709\u5F53\u8282\u70B9\u5206\u914D\u4E86\u69FD\uFF0C\u624D\u80FD\u54CD\u5E94\u548C\u8FD9\u4E9B\u69FD\u5173\u8054\u7684\u952E\u547D\u4EE4\u3002\u901A\u8FC7 cluster addslots\u547D\u4EE4\u4E3A\u8282\u70B9\u5206\u914D\u69FD\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-15341792-e7a6-428c-a109-22827e02be5f.png" alt="\u5206\u914D\u69FD"></p><h5 id="\u6545\u969C\u8F6C\u79FB" tabindex="-1"><a class="header-anchor" href="#\u6545\u969C\u8F6C\u79FB" aria-hidden="true">#</a> \u6545\u969C\u8F6C\u79FB</h5><p>Redis\u96C6\u7FA4\u7684\u6545\u969C\u8F6C\u79FB\u548C\u54E8\u5175\u7684\u6545\u969C\u8F6C\u79FB\u7C7B\u4F3C\uFF0C\u4F46\u662FRedis\u96C6\u7FA4\u4E2D\u6240\u6709\u7684\u8282\u70B9\u90FD\u8981\u627F\u62C5\u72B6\u6001\u7EF4\u62A4\u7684\u4EFB\u52A1\u3002</p><p><strong>\u6545\u969C\u53D1\u73B0</strong> Redis\u96C6\u7FA4\u5185\u8282\u70B9\u901A\u8FC7ping/pong\u6D88\u606F\u5B9E\u73B0\u8282\u70B9\u901A\u4FE1\uFF0C\u96C6\u7FA4\u4E2D\u6BCF\u4E2A\u8282\u70B9\u90FD\u4F1A\u5B9A\u671F\u5411\u5176\u4ED6\u8282\u70B9\u53D1\u9001ping\u6D88\u606F\uFF0C\u63A5\u6536\u8282\u70B9\u56DE\u590Dpong \u6D88\u606F\u4F5C\u4E3A\u54CD\u5E94\u3002\u5982\u679C\u5728cluster-node-timeout\u65F6\u95F4\u5185\u901A\u4FE1\u4E00\u76F4\u5931\u8D25\uFF0C\u5219\u53D1\u9001\u8282 \u70B9\u4F1A\u8BA4\u4E3A\u63A5\u6536\u8282\u70B9\u5B58\u5728\u6545\u969C\uFF0C\u628A\u63A5\u6536\u8282\u70B9\u6807\u8BB0\u4E3A\u4E3B\u89C2\u4E0B\u7EBF\uFF08pfail\uFF09\u72B6\u6001\u3002 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-84a2a89e-f9ea-4681-b748-1a4f1dee172b.png" alt="\u4E3B\u89C2\u4E0B\u7EBF"> \u5F53\u67D0\u4E2A\u8282\u70B9\u5224\u65AD\u53E6\u4E00\u4E2A\u8282\u70B9\u4E3B\u89C2\u4E0B\u7EBF\u540E\uFF0C\u76F8\u5E94\u7684\u8282\u70B9\u72B6\u6001\u4F1A\u8DDF\u968F\u6D88\u606F\u5728\u96C6\u7FA4\u5185\u4F20\u64AD\u3002\u901A\u8FC7Gossip\u6D88\u606F\u4F20\u64AD\uFF0C\u96C6\u7FA4\u5185\u8282\u70B9\u4E0D\u65AD\u6536\u96C6\u5230\u6545\u969C\u8282\u70B9\u7684\u4E0B\u7EBF\u62A5\u544A\u3002\u5F53 \u534A\u6570\u4EE5\u4E0A\u6301\u6709\u69FD\u7684\u4E3B\u8282\u70B9\u90FD\u6807\u8BB0\u67D0\u4E2A\u8282\u70B9\u662F\u4E3B\u89C2\u4E0B\u7EBF\u65F6\u3002\u89E6\u53D1\u5BA2\u89C2\u4E0B\u7EBF\u6D41\u7A0B\u3002 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-b61a6109-7aea-45ab-a53c-267eebb9180a.png" alt="\u4E3B\u89C2\u4E0B\u7EBF\u548C\u5BA2\u89C2\u4E0B\u7EBF"></p><p><strong>\u6545\u969C\u6062\u590D</strong></p><p>\u6545\u969C\u8282\u70B9\u53D8\u4E3A\u5BA2\u89C2\u4E0B\u7EBF\u540E\uFF0C\u5982\u679C\u4E0B\u7EBF\u8282\u70B9\u662F\u6301\u6709\u69FD\u7684\u4E3B\u8282\u70B9\u5219\u9700\u8981\u5728\u5B83 \u7684\u4ECE\u8282\u70B9\u4E2D\u9009\u51FA\u4E00\u4E2A\u66FF\u6362\u5B83\uFF0C\u4ECE\u800C\u4FDD\u8BC1\u96C6\u7FA4\u7684\u9AD8\u53EF\u7528\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-0e5a49b3-cb5a-4aef-a81f-fce50a012a39.png" alt="\u6545\u969C\u6062\u590D\u6D41\u7A0B"></p><ol><li>\u8D44\u683C\u68C0\u67E5 \u6BCF\u4E2A\u4ECE\u8282\u70B9\u90FD\u8981\u68C0\u67E5\u6700\u540E\u4E0E\u4E3B\u8282\u70B9\u65AD\u7EBF\u65F6\u95F4\uFF0C\u5224\u65AD\u662F\u5426\u6709\u8D44\u683C\u66FF\u6362\u6545\u969C \u7684\u4E3B\u8282\u70B9\u3002</li><li>\u51C6\u5907\u9009\u4E3E\u65F6\u95F4 \u5F53\u4ECE\u8282\u70B9\u7B26\u5408\u6545\u969C\u8F6C\u79FB\u8D44\u683C\u540E\uFF0C\u66F4\u65B0\u89E6\u53D1\u6545\u969C\u9009\u4E3E\u7684\u65F6\u95F4\uFF0C\u53EA\u6709\u5230\u8FBE\u8BE5 \u65F6\u95F4\u540E\u624D\u80FD\u6267\u884C\u540E\u7EED\u6D41\u7A0B\u3002</li><li>\u53D1\u8D77\u9009\u4E3E \u5F53\u4ECE\u8282\u70B9\u5B9A\u65F6\u4EFB\u52A1\u68C0\u6D4B\u5230\u8FBE\u6545\u969C\u9009\u4E3E\u65F6\u95F4\uFF08failover_auth_time\uFF09\u5230\u8FBE\u540E\uFF0C\u53D1\u8D77\u9009\u4E3E\u6D41\u7A0B\u3002</li><li>\u9009\u4E3E\u6295\u7968 \u6301\u6709\u69FD\u7684\u4E3B\u8282\u70B9\u5904\u7406\u6545\u969C\u9009\u4E3E\u6D88\u606F\u3002\u6295\u7968\u8FC7\u7A0B\u5176\u5B9E\u662F\u4E00\u4E2A\u9886\u5BFC\u8005\u9009\u4E3E\u7684\u8FC7\u7A0B\uFF0C\u5982\u96C6\u7FA4\u5185\u6709N\u4E2A\u6301\u6709\u69FD\u7684\u4E3B\u8282 \u70B9\u4EE3\u8868\u6709N\u5F20\u9009\u7968\u3002\u7531\u4E8E\u5728\u6BCF\u4E2A\u914D\u7F6E\u7EAA\u5143\u5185\u6301\u6709\u69FD\u7684\u4E3B\u8282\u70B9\u53EA\u80FD\u6295\u7968\u7ED9\u4E00\u4E2A \u4ECE\u8282\u70B9\uFF0C\u56E0\u6B64\u53EA\u80FD\u6709\u4E00\u4E2A\u4ECE\u8282\u70B9\u83B7\u5F97N/2+1\u7684\u9009\u7968\uFF0C\u4FDD\u8BC1\u80FD\u591F\u627E\u51FA\u552F\u4E00\u7684\u4ECE\u8282\u70B9\u3002 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-d0e16ea3-6683-43f4-82a3-80478703ae06.png" alt="\u9009\u4E3E\u6295\u7968"></li><li>\u66FF\u6362\u4E3B\u8282\u70B9 \u5F53\u4ECE\u8282\u70B9\u6536\u96C6\u5230\u8DB3\u591F\u7684\u9009\u7968\u4E4B\u540E\uFF0C\u89E6\u53D1\u66FF\u6362\u4E3B\u8282\u70B9\u64CD\u4F5C\u3002</li></ol><blockquote><p><strong>\u90E8\u7F72Redis\u96C6\u7FA4\u81F3\u5C11\u9700\u8981\u51E0\u4E2A\u7269\u7406\u8282\u70B9\uFF1F</strong></p></blockquote><p>\u5728\u6295\u7968\u9009\u4E3E\u7684\u73AF\u8282\uFF0C\u6545\u969C\u4E3B\u8282\u70B9\u4E5F\u7B97\u5728\u6295\u7968\u6570\u5185\uFF0C\u5047\u8BBE\u96C6\u7FA4\u5185\u8282\u70B9\u89C4\u6A21\u662F3\u4E3B3\u4ECE\uFF0C\u5176\u4E2D\u67092 \u4E2A\u4E3B\u8282\u70B9\u90E8\u7F72\u5728\u4E00\u53F0\u673A\u5668\u4E0A\uFF0C\u5F53\u8FD9\u53F0\u673A\u5668\u5B95\u673A\u65F6\uFF0C\u7531\u4E8E\u4ECE\u8282\u70B9\u65E0\u6CD5\u6536\u96C6\u5230 3/2+1\u4E2A\u4E3B\u8282\u70B9\u9009\u7968\u5C06\u5BFC\u81F4\u6545\u969C\u8F6C\u79FB\u5931\u8D25\u3002\u8FD9\u4E2A\u95EE\u9898\u4E5F\u9002\u7528\u4E8E\u6545\u969C\u53D1\u73B0\u73AF\u8282\u3002\u56E0\u6B64\u90E8\u7F72\u96C6\u7FA4\u65F6\u6240\u6709\u4E3B\u8282\u70B9\u6700\u5C11\u9700\u8981\u90E8\u7F72\u57283\u53F0\u7269\u7406\u673A\u4E0A\u624D\u80FD\u907F\u514D\u5355\u70B9\u95EE\u9898\u3002</p><h3 id="_25-\u8BF4\u8BF4\u96C6\u7FA4\u7684\u4F38\u7F29" tabindex="-1"><a class="header-anchor" href="#_25-\u8BF4\u8BF4\u96C6\u7FA4\u7684\u4F38\u7F29" aria-hidden="true">#</a> 25.\u8BF4\u8BF4\u96C6\u7FA4\u7684\u4F38\u7F29\uFF1F</h3><p>Redis\u96C6\u7FA4\u63D0\u4F9B\u4E86\u7075\u6D3B\u7684\u8282\u70B9\u6269\u5BB9\u548C\u6536\u7F29\u65B9\u6848\uFF0C\u53EF\u4EE5\u5728\u4E0D\u5F71\u54CD\u96C6\u7FA4\u5BF9\u5916\u670D\u52A1\u7684\u60C5\u51B5\u4E0B\uFF0C\u4E3A\u96C6\u7FA4\u6DFB\u52A0\u8282\u70B9\u8FDB\u884C\u6269\u5BB9\u4E5F\u53EF\u4EE5\u4E0B\u7EBF\u90E8\u5206\u8282\u70B9\u8FDB\u884C\u7F29\u5BB9\u3002 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-dd3e9494-eddb-4861-85f7-2646018d93f6.png" alt="\u96C6\u7FA4\u7684\u4F38\u7F29">\u5176\u5B9E\uFF0C\u96C6\u7FA4\u6269\u5BB9\u548C\u7F29\u5BB9\u7684\u5173\u952E\u70B9\uFF0C\u5C31\u5728\u4E8E\u69FD\u548C\u8282\u70B9\u7684\u5BF9\u5E94\u5173\u7CFB\uFF0C\u6269\u5BB9\u548C\u7F29\u5BB9\u5C31\u662F\u5C06\u4E00\u90E8\u5206<code>\u69FD</code>\u548C<code>\u6570\u636E</code>\u8FC1\u79FB\u7ED9\u65B0\u8282\u70B9\u3002</p><p>\u4F8B\u5982\u4E0B\u9762\u4E00\u4E2A\u96C6\u7FA4\uFF0C\u6BCF\u4E2A\u8282\u70B9\u5BF9\u5E94\u82E5\u5E72\u4E2A\u69FD\uFF0C\u6BCF\u4E2A\u69FD\u5BF9\u5E94\u4E00\u5B9A\u7684\u6570\u636E\uFF0C\u5982\u679C\u5E0C\u671B\u52A0\u51651\u4E2A\u8282\u70B9\u5E0C\u671B\u5B9E\u73B0\u96C6\u7FA4\u6269\u5BB9\u65F6\uFF0C\u9700\u8981\u901A\u8FC7\u76F8\u5173\u547D\u4EE4\u628A\u4E00\u90E8\u5206\u69FD\u548C\u5185\u5BB9\u8FC1\u79FB\u7ED9\u65B0\u8282\u70B9\u3002 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-1d24bb63-2b05-4db9-bd6b-983f16a4830e.png" alt="\u6269\u5BB9\u5B9E\u4F8B">\u7F29\u5BB9\u4E5F\u662F\u7C7B\u4F3C\uFF0C\u5148\u628A\u69FD\u548C\u6570\u636E\u8FC1\u79FB\u5230\u5176\u5B83\u8282\u70B9\uFF0C\u518D\u628A\u5BF9\u5E94\u7684\u8282\u70B9\u4E0B\u7EBF\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><h2 id="\u7F13\u5B58\u8BBE\u8BA1" tabindex="-1"><a class="header-anchor" href="#\u7F13\u5B58\u8BBE\u8BA1" aria-hidden="true">#</a> \u7F13\u5B58\u8BBE\u8BA1</h2><h3 id="_26-\u4EC0\u4E48\u662F\u7F13\u5B58\u51FB\u7A7F\u3001\u7F13\u5B58\u7A7F\u900F\u3001\u7F13\u5B58\u96EA\u5D29" tabindex="-1"><a class="header-anchor" href="#_26-\u4EC0\u4E48\u662F\u7F13\u5B58\u51FB\u7A7F\u3001\u7F13\u5B58\u7A7F\u900F\u3001\u7F13\u5B58\u96EA\u5D29" aria-hidden="true">#</a> 26.\u4EC0\u4E48\u662F\u7F13\u5B58\u51FB\u7A7F\u3001\u7F13\u5B58\u7A7F\u900F\u3001\u7F13\u5B58\u96EA\u5D29\uFF1F</h3><p>PS:\u8FD9\u662F\u591A\u5E74\u9EC4\u5386\u7684\u8001\u516B\u80A1\u4E86\uFF0C\u4E00\u5B9A\u8981\u7406\u89E3\u6E05\u695A\u3002</p><h5 id="\u7F13\u5B58\u51FB\u7A7F" tabindex="-1"><a class="header-anchor" href="#\u7F13\u5B58\u51FB\u7A7F" aria-hidden="true">#</a> \u7F13\u5B58\u51FB\u7A7F</h5><p>\u4E00\u4E2A\u5E76\u53D1\u8BBF\u95EE\u91CF\u6BD4\u8F83\u5927\u7684key\u5728\u67D0\u4E2A\u65F6\u95F4\u8FC7\u671F\uFF0C\u5BFC\u81F4\u6240\u6709\u7684\u8BF7\u6C42\u76F4\u63A5\u6253\u5728DB\u4E0A\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-86579ee6-9dae-4274-a5cc-af6812f48da4.png" alt="\u7F13\u5B58\u51FB\u7A7F"> \u89E3\u51B3\u2F45\u6848\uFF1A</p><ol><li><p>\u52A0\u9501\u66F4\u65B0\uFF0C\u2F50\u5982\u8BF7\u6C42\u67E5\u8BE2A\uFF0C\u53D1\u73B0\u7F13\u5B58\u4E2D\u6CA1\u6709\uFF0C\u5BF9A\u8FD9\u4E2Akey\u52A0\u9501\uFF0C\u540C\u65F6\u53BB\u6570\u636E\u5E93\u67E5\u8BE2\u6570\u636E\uFF0C\u5199\u2F0A\u7F13\u5B58\uFF0C\u518D\u8FD4\u56DE\u7ED9\u2F64\u6237\uFF0C\u8FD9\u6837\u540E\u2FAF\u7684\u8BF7\u6C42\u5C31\u53EF\u4EE5\u4ECE\u7F13\u5B58\u4E2D\u62FF\u5230\u6570\u636E\u4E86\u3002 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-cf63911a-8501-493e-a375-8b47a9f33358.png" alt="\u52A0\u9501\u66F4\u65B0"></p></li><li><p>\u5C06\u8FC7\u671F\u65F6\u95F4\u7EC4\u5408\u5199\u5728value\u4E2D\uFF0C\u901A\u8FC7\u5F02\u6B65\u7684\u2F45\u5F0F\u4E0D\u65AD\u7684\u5237\u65B0\u8FC7\u671F\u65F6\u95F4\uFF0C\u9632\u2F4C\u6B64\u7C7B\u73B0\u8C61\u3002</p></li></ol><h5 id="\u7F13\u5B58\u7A7F\u900F" tabindex="-1"><a class="header-anchor" href="#\u7F13\u5B58\u7A7F\u900F" aria-hidden="true">#</a> \u7F13\u5B58\u7A7F\u900F</h5><p>\u7F13\u5B58\u7A7F\u900F\u6307\u7684\u67E5\u8BE2\u7F13\u5B58\u548C\u6570\u636E\u5E93\u4E2D\u90FD\u4E0D\u5B58\u5728\u7684\u6570\u636E\uFF0C\u8FD9\u6837\u6BCF\u6B21\u8BF7\u6C42\u76F4\u63A5\u6253\u5230\u6570\u636E\u5E93\uFF0C\u5C31\u597D\u50CF\u7F13\u5B58\u4E0D\u5B58\u5728\u4E00\u6837\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-029951e6-8b99-4364-a570-010853deb594.png" alt="\u7F13\u5B58\u7A7F\u900F"> \u7F13\u5B58\u7A7F\u900F\u5C06\u5BFC\u81F4\u4E0D\u5B58\u5728\u7684\u6570\u636E\u6BCF\u6B21\u8BF7\u6C42\u90FD\u8981\u5230\u5B58\u50A8\u5C42\u53BB\u67E5\u8BE2\uFF0C\u5931\u53BB\u4E86\u7F13\u5B58\u4FDD\u62A4\u540E\u7AEF\u5B58\u50A8\u7684\u610F\u4E49\u3002</p><p>\u7F13\u5B58\u7A7F\u900F\u53EF\u80FD\u4F1A\u4F7F\u540E\u7AEF\u5B58\u50A8\u8D1F\u8F7D\u52A0\u5927\uFF0C\u5982\u679C\u53D1\u73B0\u5927\u91CF\u5B58\u50A8\u5C42\u7A7A\u547D\u4E2D\uFF0C\u53EF\u80FD\u5C31\u662F\u51FA\u73B0\u4E86\u7F13\u5B58\u7A7F\u900F\u95EE\u9898\u3002</p><p>\u7F13\u5B58\u7A7F\u900F\u53EF\u80FD\u6709\u4E24\u79CD\u539F\u56E0\uFF1A</p><ol><li>\u81EA\u8EAB\u4E1A\u52A1\u4EE3\u7801\u95EE\u9898</li><li>\u6076\u610F\u653B\u51FB\uFF0C\u722C\u866B\u9020\u6210\u7A7A\u547D\u4E2D</li></ol><p>\u5B83\u4E3B\u8981\u6709\u4E24\u79CD\u89E3\u51B3\u529E\u6CD5\uFF1A</p><ul><li><strong>\u7F13\u5B58\u7A7A\u503C/\u9ED8\u8BA4\u503C</strong></li></ul><p>\u4E00\u79CD\u65B9\u5F0F\u662F\u5728\u6570\u636E\u5E93\u4E0D\u547D\u4E2D\u4E4B\u540E\uFF0C\u628A\u4E00\u4E2A\u7A7A\u5BF9\u8C61\u6216\u8005\u9ED8\u8BA4\u503C\u4FDD\u5B58\u5230\u7F13\u5B58\uFF0C\u4E4B\u540E\u518D\u8BBF\u95EE\u8FD9\u4E2A\u6570\u636E\uFF0C\u5C31\u4F1A\u4ECE\u7F13\u5B58\u4E2D\u83B7\u53D6\uFF0C\u8FD9\u6837\u5C31\u4FDD\u62A4\u4E86\u6570\u636E\u5E93\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-288af5a2-ae5a-427a-95e9-b4a658b01386.png" alt="\u7F13\u5B58\u7A7A\u503C/\u9ED8\u8BA4\u503C"></p><p>\u7F13\u5B58\u7A7A\u503C\u6709\u4E24\u5927\u95EE\u9898\uFF1A</p><ol><li><p>\u7A7A\u503C\u505A\u4E86\u7F13\u5B58\uFF0C\u610F\u5473\u7740\u7F13\u5B58\u5C42\u4E2D\u5B58\u4E86\u66F4\u591A\u7684\u952E\uFF0C\u9700\u8981\u66F4\u591A\u7684\u5185\u5B58\u7A7A\u95F4\uFF08\u5982\u679C\u662F\u653B\u51FB\uFF0C\u95EE\u9898\u66F4\u4E25\u91CD\uFF09\uFF0C\u6BD4\u8F83\u6709\u6548\u7684\u65B9\u6CD5\u662F\u9488\u5BF9\u8FD9\u7C7B\u6570\u636E\u8BBE\u7F6E\u4E00\u4E2A\u8F83\u77ED\u7684\u8FC7\u671F\u65F6\u95F4\uFF0C\u8BA9\u5176\u81EA\u52A8\u5254\u9664\u3002</p></li><li><p>\u7F13\u5B58\u5C42\u548C\u5B58\u50A8\u5C42\u7684\u6570\u636E\u4F1A\u6709\u4E00\u6BB5\u65F6\u95F4\u7A97\u53E3\u7684\u4E0D\u4E00\u81F4\uFF0C\u53EF\u80FD\u4F1A\u5BF9\u4E1A\u52A1\u6709\u4E00\u5B9A\u5F71\u54CD\u3002 \u4F8B\u5982\u8FC7\u671F\u65F6\u95F4\u8BBE\u7F6E\u4E3A5\u5206\u949F\uFF0C\u5982\u679C\u6B64\u65F6\u5B58\u50A8\u5C42\u6DFB\u52A0\u4E86\u8FD9\u4E2A\u6570\u636E\uFF0C\u90A3\u6B64\u6BB5\u65F6\u95F4\u5C31\u4F1A\u51FA\u73B0\u7F13\u5B58\u5C42\u548C\u5B58\u50A8\u5C42\u6570\u636E\u7684\u4E0D\u4E00\u81F4\u3002 \u8FD9\u65F6\u5019\u53EF\u4EE5\u5229\u7528\u6D88\u606F\u961F\u5217\u6216\u8005\u5176\u5B83\u5F02\u6B65\u65B9\u5F0F\u6E05\u7406\u7F13\u5B58\u4E2D\u7684\u7A7A\u5BF9\u8C61\u3002</p></li></ol><ul><li><strong>\u5E03\u9686\u8FC7\u6EE4\u5668</strong> \u9664\u4E86\u7F13\u5B58\u7A7A\u5BF9\u8C61\uFF0C\u6211\u4EEC\u8FD8\u53EF\u4EE5\u5728\u5B58\u50A8\u548C\u7F13\u5B58\u4E4B\u524D\uFF0C\u52A0\u4E00\u4E2A\u5E03\u9686\u8FC7\u6EE4\u5668\uFF0C\u505A\u4E00\u5C42\u8FC7\u6EE4\u3002</li></ul><p>\u5E03\u9686\u8FC7\u6EE4\u5668\u91CC\u4F1A\u4FDD\u5B58\u6570\u636E\u662F\u5426\u5B58\u5728\uFF0C\u5982\u679C\u5224\u65AD\u6570\u636E\u4E0D\u4E0D\u80FD\u518D\uFF0C\u5C31\u4E0D\u4F1A\u8BBF\u95EE\u5B58\u50A8\u3002 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-0e18ea40-a2e5-4fa6-989e-e771f6e4b0fc.png" alt="\u5E03\u9686\u8FC7\u6EE4\u5668"> \u4E24\u79CD\u89E3\u51B3\u65B9\u6848\u7684\u5BF9\u6BD4\uFF1A <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-e8a382c9-4379-44ab-b1dc-fb598a228105.png" alt="\u7F13\u5B58\u7A7A\u5BF9\u8C61\u6838\u5E03\u9686\u8FC7\u6EE4\u5668\u65B9\u6848\u5BF9\u6BD4"></p><h5 id="\u7F13\u5B58\u96EA\u5D29" tabindex="-1"><a class="header-anchor" href="#\u7F13\u5B58\u96EA\u5D29" aria-hidden="true">#</a> \u7F13\u5B58\u96EA\u5D29</h5><p>\u67D0\u2F00\u65F6\u523B\u53D1\u2F63\u2F24\u89C4\u6A21\u7684\u7F13\u5B58\u5931\u6548\u7684\u60C5\u51B5\uFF0C\u4F8B\u5982\u7F13\u5B58\u670D\u52A1\u5B95\u673A\u3001\u5927\u91CFkey\u5728\u540C\u4E00\u65F6\u95F4\u8FC7\u671F\uFF0C\u8FD9\u6837\u7684\u540E\u679C\u5C31\u662F\u2F24\u91CF\u7684\u8BF7\u6C42\u8FDB\u6765\u76F4\u63A5\u6253\u5230DB\u4E0A\uFF0C\u53EF\u80FD\u5BFC\u81F4\u6574\u4E2A\u7CFB\u7EDF\u7684\u5D29\u6E83\uFF0C\u79F0\u4E3A\u96EA\u5D29\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-1464fe22-c463-4850-8989-b899510cb10e.png" alt="\u7F13\u5B58\u96EA\u5D29"> \u7F13\u5B58\u96EA\u5D29\u662F\u4E09\u5927\u7F13\u5B58\u95EE\u9898\u91CC\u6700\u4E25\u91CD\u7684\u4E00\u79CD\uFF0C\u6211\u4EEC\u6765\u770B\u770B\u600E\u4E48\u9884\u9632\u548C\u5904\u7406\u3002</p><ul><li><strong>\u63D0\u9AD8\u7F13\u5B58\u53EF\u7528\u6027</strong></li></ul><ol><li>\u96C6\u7FA4\u90E8\u7F72\uFF1A\u901A\u8FC7\u96C6\u7FA4\u6765\u63D0\u5347\u7F13\u5B58\u7684\u53EF\u7528\u6027\uFF0C\u53EF\u4EE5\u5229\u7528Redis\u672C\u8EAB\u7684Redis Cluster\u6216\u8005\u7B2C\u4E09\u65B9\u96C6\u7FA4\u65B9\u6848\u5982Codis\u7B49\u3002</li><li>\u591A\u7EA7\u7F13\u5B58\uFF1A\u8BBE\u7F6E\u591A\u7EA7\u7F13\u5B58\uFF0C\u7B2C\u4E00\u7EA7\u7F13\u5B58\u5931\u6548\u7684\u57FA\u7840\u4E0A\uFF0C\u8BBF\u95EE\u4E8C\u7EA7\u7F13\u5B58\uFF0C\u6BCF\u4E00\u7EA7\u7F13\u5B58\u7684\u5931\u6548\u65F6\u95F4\u90FD\u4E0D\u540C\u3002</li></ol><ul><li><strong>\u8FC7\u671F\u65F6\u95F4</strong></li></ul><ol><li>\u5747\u5300\u8FC7\u671F\uFF1A\u4E3A\u4E86\u907F\u514D\u5927\u91CF\u7684\u7F13\u5B58\u5728\u540C\u4E00\u65F6\u95F4\u8FC7\u671F\uFF0C\u53EF\u4EE5\u628A\u4E0D\u540C\u7684 key \u8FC7\u671F\u65F6\u95F4\u968F\u673A\u751F\u6210\uFF0C\u907F\u514D\u8FC7\u671F\u65F6\u95F4\u592A\u8FC7\u96C6\u4E2D\u3002</li><li>\u70ED\u70B9\u6570\u636E\u6C38\u4E0D\u8FC7\u671F\u3002</li></ol><ul><li><strong>\u7194\u65AD\u964D\u7EA7</strong></li></ul><ol><li>\u670D\u52A1\u7194\u65AD\uFF1A\u5F53\u7F13\u5B58\u670D\u52A1\u5668\u5B95\u673A\u6216\u8D85\u65F6\u54CD\u5E94\u65F6\uFF0C\u4E3A\u4E86\u9632\u6B62\u6574\u4E2A\u7CFB\u7EDF\u51FA\u73B0\u96EA\u5D29\uFF0C\u6682\u65F6\u505C\u6B62\u4E1A\u52A1\u670D\u52A1\u8BBF\u95EE\u7F13\u5B58\u7CFB\u7EDF\u3002</li><li>\u670D\u52A1\u964D\u7EA7\uFF1A\u5F53\u51FA\u73B0\u5927\u91CF\u7F13\u5B58\u5931\u6548\uFF0C\u800C\u4E14\u5904\u5728\u9AD8\u5E76\u53D1\u9AD8\u8D1F\u8377\u7684\u60C5\u51B5\u4E0B\uFF0C\u5728\u4E1A\u52A1\u7CFB\u7EDF\u5185\u90E8\u6682\u65F6\u820D\u5F03\u5BF9\u4E00\u4E9B\u975E\u6838\u5FC3\u7684\u63A5\u53E3\u548C\u6570\u636E\u7684\u8BF7\u6C42\uFF0C\u800C\u76F4\u63A5\u8FD4\u56DE\u4E00\u4E2A\u63D0\u524D\u51C6\u5907\u597D\u7684 fallback\uFF08\u9000\u8DEF\uFF09\u9519\u8BEF\u5904\u7406\u4FE1\u606F\u3002</li></ol><h3 id="_27-\u80FD\u8BF4\u8BF4\u5E03\u9686\u8FC7\u6EE4\u5668\u5417" tabindex="-1"><a class="header-anchor" href="#_27-\u80FD\u8BF4\u8BF4\u5E03\u9686\u8FC7\u6EE4\u5668\u5417" aria-hidden="true">#</a> 27.\u80FD\u8BF4\u8BF4\u5E03\u9686\u8FC7\u6EE4\u5668\u5417\uFF1F</h3><p>\u5E03\u9686\u8FC7\u6EE4\u5668\uFF0C\u5B83\u662F\u4E00\u4E2A\u8FDE\u7EED\u7684\u6570\u636E\u7ED3\u6784\uFF0C\u6BCF\u4E2A\u5B58\u50A8\u4F4D\u5B58\u50A8\u90FD\u662F\u4E00\u4E2A<code>bit</code>\uFF0C\u5373<code>0</code>\u6216\u8005<code>1</code>, \u6765\u6807\u8BC6\u6570\u636E\u662F\u5426\u5B58\u5728\u3002</p><p>\u5B58\u50A8\u6570\u636E\u7684\u65F6\u65F6\u5019\uFF0C\u4F7F\u7528K\u4E2A\u4E0D\u540C\u7684\u54C8\u5E0C\u51FD\u6570\u5C06\u8FD9\u4E2A\u53D8\u91CF\u6620\u5C04\u4E3Abit\u5217\u8868\u7684\u7684K\u4E2A\u70B9\uFF0C\u628A\u5B83\u4EEC\u7F6E\u4E3A1\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-d0b8d85c-85dc-4843-b4be-d5d48338a44e.png" alt="\u5E03\u9686\u8FC7\u6EE4\u5668">\u6211\u4EEC\u5224\u65AD\u7F13\u5B58key\u662F\u5426\u5B58\u5728\uFF0C\u540C\u6837\uFF0CK\u4E2A\u54C8\u5E0C\u51FD\u6570\uFF0C\u6620\u5C04\u5230bit\u5217\u8868\u4E0A\u7684K\u4E2A\u70B9\uFF0C\u5224\u65AD\u662F\u4E0D\u662F1\uFF1A</p><ul><li>\u5982\u679C\u5168\u4E0D\u662F1\uFF0C\u90A3\u4E48key\u4E0D\u5B58\u5728\uFF1B</li><li>\u5982\u679C\u90FD\u662F1\uFF0C\u4E5F\u53EA\u662F\u8868\u793Akey\u53EF\u80FD\u5B58\u5728\u3002</li></ul><p>\u5E03\u9686\u8FC7\u6EE4\u5668\u4E5F\u6709\u4E00\u4E9B\u7F3A\u70B9\uFF1A</p><ol><li>\u5B83\u5728\u5224\u65AD\u5143\u7D20\u662F\u5426\u5728\u96C6\u5408\u4E2D\u65F6\u662F\u6709\u4E00\u5B9A\u9519\u8BEF\u51E0\u7387\uFF0C\u56E0\u4E3A\u54C8\u5E0C\u7B97\u6CD5\u6709\u4E00\u5B9A\u7684\u78B0\u649E\u7684\u6982\u7387\u3002</li><li>\u4E0D\u652F\u6301\u5220\u9664\u5143\u7D20\u3002</li></ol><h3 id="_28-\u5982\u4F55\u4FDD\u8BC1\u7F13\u5B58\u548C\u6570\u636E\u5E93\u6570\u636E\u7684\u4E00\u81F4\u6027" tabindex="-1"><a class="header-anchor" href="#_28-\u5982\u4F55\u4FDD\u8BC1\u7F13\u5B58\u548C\u6570\u636E\u5E93\u6570\u636E\u7684\u4E00\u81F4\u6027" aria-hidden="true">#</a> 28.\u5982\u4F55\u4FDD\u8BC1\u7F13\u5B58\u548C\u6570\u636E\u5E93\u6570\u636E\u7684\u2F00\u81F4\u6027\uFF1F</h3><p>\u6839\u636ECAP\u7406\u8BBA\uFF0C\u5728\u4FDD\u8BC1\u53EF\u7528\u6027\u548C\u5206\u533A\u5BB9\u9519\u6027\u7684\u524D\u63D0\u4E0B\uFF0C\u65E0\u6CD5\u4FDD\u8BC1\u4E00\u81F4\u6027\uFF0C\u6240\u4EE5\u7F13\u5B58\u548C\u6570\u636E\u5E93\u7684\u7EDD\u5BF9\u4E00\u81F4\u662F\u4E0D\u53EF\u80FD\u5B9E\u73B0\u7684\uFF0C\u53EA\u80FD\u5C3D\u53EF\u80FD\u4FDD\u5B58\u7F13\u5B58\u548C\u6570\u636E\u5E93\u7684\u6700\u7EC8\u4E00\u81F4\u6027\u3002</p><h5 id="\u9009\u62E9\u5408\u9002\u7684\u7F13\u5B58\u66F4\u65B0\u7B56\u7565" tabindex="-1"><a class="header-anchor" href="#\u9009\u62E9\u5408\u9002\u7684\u7F13\u5B58\u66F4\u65B0\u7B56\u7565" aria-hidden="true">#</a> \u9009\u62E9\u5408\u9002\u7684\u7F13\u5B58\u66F4\u65B0\u7B56\u7565</h5><p><strong>1. \u5220\u9664\u7F13\u5B58\u800C\u4E0D\u662F\u66F4\u65B0\u7F13\u5B58</strong></p><p>\u5F53\u4E00\u4E2A\u7EBF\u7A0B\u5BF9\u7F13\u5B58\u7684key\u8FDB\u884C\u5199\u64CD\u4F5C\u7684\u65F6\u5019\uFF0C\u5982\u679C\u5176\u5B83\u7EBF\u7A0B\u8FDB\u6765\u8BFB\u6570\u636E\u5E93\u7684\u65F6\u5019\uFF0C\u8BFB\u5230\u7684\u5C31\u662F\u810F\u6570\u636E\uFF0C\u4EA7\u751F\u4E86\u6570\u636E\u4E0D\u4E00\u81F4\u95EE\u9898\u3002</p><p>\u76F8\u6BD4\u8F83\u800C\u8A00\uFF0C\u5220\u9664\u7F13\u5B58\u7684\u901F\u5EA6\u6BD4\u66F4\u65B0\u7F13\u5B58\u7684\u901F\u5EA6\u5FEB\u5F88\u591A\uFF0C\u6240\u7528\u65F6\u95F4\u76F8\u5BF9\u4E5F\u5C11\u5F88\u591A\uFF0C\u8BFB\u810F\u6570\u636E\u7684\u6982\u7387\u4E5F\u5C0F\u5F88\u591A\u3002 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-ebad0a67-3012-4466-a4dc-e834104c48f8.png" alt="\u5220\u9664\u7F13\u5B58\u548C\u66F4\u65B0\u7F13\u5B58"></p><ol start="2"><li><strong>\u5148\u66F4\u6570\u636E\uFF0C\u540E\u5220\u7F13\u5B58</strong> \u5148\u66F4\u6570\u636E\u5E93\u8FD8\u662F\u5148\u5220\u7F13\u5B58\uFF1F\u8FD9\u662F\u4E00\u4E2A\u95EE\u9898\u3002</li></ol><p>\u66F4\u65B0\u6570\u636E\uFF0C\u8017\u65F6\u53EF\u80FD\u5728\u5220\u9664\u7F13\u5B58\u7684\u767E\u500D\u4EE5\u4E0A\u3002\u5728\u7F13\u5B58\u4E2D\u4E0D\u5B58\u5728\u5BF9\u5E94\u7684key\uFF0C\u6570\u636E\u5E93\u53C8\u6CA1\u6709\u5B8C\u6210\u66F4\u65B0\u7684\u65F6\u5019\uFF0C\u5982\u679C\u6709\u7EBF\u7A0B\u8FDB\u6765\u8BFB\u53D6\u6570\u636E\uFF0C\u5E76\u5199\u5165\u5230\u7F13\u5B58\uFF0C\u90A3\u4E48\u5728\u66F4\u65B0\u6210\u529F\u4E4B\u540E\uFF0C\u8FD9\u4E2Akey\u5C31\u662F\u4E00\u4E2A\u810F\u6570\u636E\u3002</p><p>\u6BEB\u65E0\u7591\u95EE\uFF0C\u5148\u5220\u7F13\u5B58\uFF0C\u518D\u66F4\u6570\u636E\u5E93\uFF0C\u7F13\u5B58\u4E2Dkey\u4E0D\u5B58\u5728\u7684\u65F6\u95F4\u7684\u65F6\u95F4\u66F4\u957F\uFF0C\u6709\u66F4\u5927\u7684\u6982\u7387\u4F1A\u4EA7\u751F\u810F\u6570\u636E\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-5c929a9e-a723-43b3-8f3c-f22c83765f9d.png" alt="\u5148\u66F4\u6570\u636E\u5E93\u8FD8\u662F\u5148\u5220\u7F13\u5B58">\u76EE\u524D\u6700\u6D41\u884C\u7684\u7F13\u5B58\u8BFB\u5199\u7B56\u7565cache-aside-pattern\u5C31\u662F\u91C7\u7528\u5148\u66F4\u6570\u636E\u5E93\uFF0C\u518D\u5220\u7F13\u5B58\u7684\u65B9\u5F0F\u3002</p><h5 id="\u7F13\u5B58\u4E0D\u4E00\u81F4\u5904\u7406" tabindex="-1"><a class="header-anchor" href="#\u7F13\u5B58\u4E0D\u4E00\u81F4\u5904\u7406" aria-hidden="true">#</a> \u7F13\u5B58\u4E0D\u4E00\u81F4\u5904\u7406</h5><p>\u5982\u679C\u4E0D\u662F\u5E76\u53D1\u7279\u522B\u9AD8\uFF0C\u5BF9\u7F13\u5B58\u4F9D\u8D56\u6027\u5F88\u5F3A\uFF0C\u5176\u5B9E\u4E00\u5B9A\u7A0B\u5E8F\u7684\u4E0D\u4E00\u81F4\u662F\u53EF\u4EE5\u63A5\u53D7\u7684\u3002</p><p>\u4F46\u662F\u5982\u679C\u5BF9\u4E00\u81F4\u6027\u8981\u6C42\u6BD4\u8F83\u9AD8\uFF0C\u90A3\u5C31\u5F97\u60F3\u529E\u6CD5\u4FDD\u8BC1\u7F13\u5B58\u548C\u6570\u636E\u5E93\u4E2D\u6570\u636E\u4E00\u81F4\u3002</p><p>\u7F13\u5B58\u548C\u6570\u636E\u5E93\u6570\u636E\u4E0D\u4E00\u81F4\u5E38\u89C1\u7684\u4E24\u79CD\u539F\u56E0\uFF1A</p><ul><li>\u7F13\u5B58key\u5220\u9664\u5931\u8D25</li><li>\u5E76\u53D1\u5BFC\u81F4\u5199\u5165\u4E86\u810F\u6570\u636E</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-51b3453e-e1f1-4c65-9879-2aa59df23eca.png" alt="\u7F13\u5B58\u4E00\u81F4\u6027"></p><p><strong>\u6D88\u606F\u961F\u5217\u4FDD\u8BC1key\u88AB\u5220\u9664</strong> \u53EF\u4EE5\u5F15\u5165\u6D88\u606F\u961F\u5217\uFF0C\u628A\u8981\u5220\u9664\u7684key\u6216\u8005\u5220\u9664\u5931\u8D25\u7684key\u4E22\u5C3D\u6D88\u606F\u961F\u5217\uFF0C\u5229\u7528\u6D88\u606F\u961F\u5217\u7684\u91CD\u8BD5\u673A\u5236\uFF0C\u91CD\u8BD5\u5220\u9664\u5BF9\u5E94\u7684key\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-e4a61193-515a-409f-a436-2733abc3a86e.png" alt="\u6D88\u606F\u961F\u5217\u4FDD\u8BC1key\u88AB\u5220\u9664">\u8FD9\u79CD\u65B9\u6848\u770B\u8D77\u6765\u4E0D\u9519\uFF0C\u7F3A\u70B9\u662F\u5BF9\u4E1A\u52A1\u4EE3\u7801\u6709\u4E00\u5B9A\u7684\u4FB5\u5165\u6027\u3002</p><p><strong>\u6570\u636E\u5E93\u8BA2\u9605+\u6D88\u606F\u961F\u5217\u4FDD\u8BC1key\u88AB\u5220\u9664</strong> \u53EF\u4EE5\u7528\u4E00\u4E2A\u670D\u52A1\uFF08\u6BD4\u5982\u963F\u91CC\u7684 canal\uFF09\u53BB\u76D1\u542C\u6570\u636E\u5E93\u7684binlog\uFF0C\u83B7\u53D6\u9700\u8981\u64CD\u4F5C\u7684\u6570\u636E\u3002</p><p>\u7136\u540E\u7528\u4E00\u4E2A\u516C\u5171\u7684\u670D\u52A1\u83B7\u53D6\u8BA2\u9605\u7A0B\u5E8F\u4F20\u6765\u7684\u4FE1\u606F\uFF0C\u8FDB\u884C\u7F13\u5B58\u5220\u9664\u64CD\u4F5C\u3002 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-37c07418-9cd8-43d9-90e7-0cb43b329025.png" alt="\u6570\u636E\u5E93\u8BA2\u9605+\u6D88\u606F\u961F\u5217\u4FDD\u8BC1key\u88AB\u5220\u9664"> \u8FD9\u79CD\u65B9\u5F0F\u964D\u4F4E\u4E86\u5BF9\u4E1A\u52A1\u7684\u4FB5\u5165\uFF0C\u4F46\u5176\u5B9E\u6574\u4E2A\u7CFB\u7EDF\u7684\u590D\u6742\u5EA6\u662F\u63D0\u5347\u7684\uFF0C\u9002\u5408\u57FA\u5EFA\u5B8C\u5584\u7684\u5927\u5382\u3002</p><p><strong>\u5EF6\u65F6\u53CC\u5220\u9632\u6B62\u810F\u6570\u636E</strong> \u8FD8\u6709\u4E00\u79CD\u60C5\u51B5\uFF0C\u662F\u5728\u7F13\u5B58\u4E0D\u5B58\u5728\u7684\u65F6\u5019\uFF0C\u5199\u5165\u4E86\u810F\u6570\u636E\uFF0C\u8FD9\u79CD\u60C5\u51B5\u5728\u5148\u5220\u7F13\u5B58\uFF0C\u518D\u66F4\u6570\u636E\u5E93\u7684\u7F13\u5B58\u66F4\u65B0\u7B56\u7565\u4E0B\u53D1\u751F\u7684\u6BD4\u8F83\u591A\uFF0C\u89E3\u51B3\u65B9\u6848\u662F\u5EF6\u65F6\u53CC\u5220\u3002</p><p>\u7B80\u5355\u8BF4\uFF0C\u5C31\u662F\u5728\u7B2C\u4E00\u6B21\u5220\u9664\u7F13\u5B58\u4E4B\u540E\uFF0C\u8FC7\u4E86\u4E00\u6BB5\u65F6\u95F4\u4E4B\u540E\uFF0C\u518D\u6B21\u5220\u9664\u7F13\u5B58\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-fab24753-9c53-4432-9413-5feba07ae1e3.png" alt="\u5EF6\u65F6\u53CC\u5220"></p><p>\u8FD9\u79CD\u65B9\u5F0F\u7684\u5EF6\u65F6\u65F6\u95F4\u8BBE\u7F6E\u9700\u8981\u4ED4\u7EC6\u8003\u91CF\u548C\u6D4B\u8BD5\u3002</p><p><strong>\u8BBE\u7F6E\u7F13\u5B58\u8FC7\u671F\u65F6\u95F4\u515C\u5E95</strong></p><p>\u8FD9\u662F\u4E00\u4E2A\u6734\u7D20\u4F46\u662F\u6709\u7528\u7684\u529E\u6CD5\uFF0C\u7ED9\u7F13\u5B58\u8BBE\u7F6E\u4E00\u4E2A\u5408\u7406\u7684\u8FC7\u671F\u65F6\u95F4\uFF0C\u5373\u4F7F\u53D1\u751F\u4E86\u7F13\u5B58\u6570\u636E\u4E0D\u4E00\u81F4\u7684\u95EE\u9898\uFF0C\u5B83\u4E5F\u4E0D\u4F1A\u6C38\u8FDC\u4E0D\u4E00\u81F4\u4E0B\u53BB\uFF0C\u7F13\u5B58\u8FC7\u671F\u7684\u65F6\u5019\uFF0C\u81EA\u7136\u53C8\u4F1A\u6062\u590D\u4E00\u81F4\u3002</p><h3 id="_29-\u5982\u4F55\u4FDD\u8BC1\u672C\u5730\u7F13\u5B58\u548C\u5206\u5E03\u5F0F\u7F13\u5B58\u7684\u4E00\u81F4" tabindex="-1"><a class="header-anchor" href="#_29-\u5982\u4F55\u4FDD\u8BC1\u672C\u5730\u7F13\u5B58\u548C\u5206\u5E03\u5F0F\u7F13\u5B58\u7684\u4E00\u81F4" aria-hidden="true">#</a> 29.\u5982\u4F55\u4FDD\u8BC1\u672C\u5730\u7F13\u5B58\u548C\u5206\u5E03\u5F0F\u7F13\u5B58\u7684\u4E00\u81F4\uFF1F</h3><p>PS:\u8FD9\u9053\u9898\u9762\u8BD5\u5F88\u5C11\u95EE\uFF0C\u4F46\u5B9E\u9645\u5DE5\u4F5C\u4E2D\u5F88\u5E38\u89C1\u3002</p><p>\u5728\u65E5\u5E38\u7684\u5F00\u53D1\u4E2D\uFF0C\u6211\u4EEC\u5E38\u5E38\u91C7\u7528\u4E24\u7EA7\u7F13\u5B58\uFF1A\u672C\u5730\u7F13\u5B58+\u5206\u5E03\u5F0F\u7F13\u5B58\u3002</p><p>\u6240\u8C13\u672C\u5730\u7F13\u5B58\uFF0C\u5C31\u662F\u5BF9\u5E94\u670D\u52A1\u5668\u7684\u5185\u5B58\u7F13\u5B58\uFF0C\u6BD4\u5982Caffeine\uFF0C\u5206\u5E03\u5F0F\u7F13\u5B58\u57FA\u672C\u5C31\u662F\u91C7\u7528Redis\u3002</p><p>\u90A3\u4E48\u95EE\u9898\u6765\u4E86\uFF0C\u672C\u5730\u7F13\u5B58\u548C\u5206\u5E03\u5F0F\u7F13\u5B58\u600E\u4E48\u4FDD\u6301\u6570\u636E\u4E00\u81F4\uFF1F <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-6d4ab7e6-8337-4576-bbf0-79202a1c3331.png" alt="\u5EF6\u65F6\u53CC\u5220"> Redis\u7F13\u5B58\uFF0C\u6570\u636E\u5E93\u53D1\u751F\u66F4\u65B0\uFF0C\u76F4\u63A5\u5220\u9664\u7F13\u5B58\u7684key\u5373\u53EF\uFF0C\u56E0\u4E3A\u5BF9\u4E8E\u5E94\u7528\u7CFB\u7EDF\u800C\u8A00\uFF0C\u5B83\u662F\u4E00\u79CD\u4E2D\u5FC3\u5316\u7684\u7F13\u5B58\u3002</p><p>\u4F46\u662F\u672C\u5730\u7F13\u5B58\uFF0C\u5B83\u662F\u975E\u4E2D\u5FC3\u5316\u7684\uFF0C\u6563\u843D\u5728\u5206\u5E03\u5F0F\u670D\u52A1\u7684\u5404\u4E2A\u8282\u70B9\u4E0A\uFF0C\u6CA1\u6CD5\u901A\u8FC7\u5BA2\u6237\u7AEF\u7684\u8BF7\u6C42\u5220\u9664\u672C\u5730\u7F13\u5B58\u7684key\uFF0C\u6240\u4EE5\u5F97\u60F3\u529E\u6CD5\u901A\u77E5\u96C6\u7FA4\u6240\u6709\u8282\u70B9\uFF0C\u5220\u9664\u5BF9\u5E94\u7684\u672C\u5730\u7F13\u5B58key\u3002 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-20c15f0d-fb3c-4922-94b1-edcd856658be.png" alt="\u672C\u5730\u7F13\u5B58/\u5206\u5E03\u5F0F\u7F13\u5B58\u4FDD\u6301\u4E00\u81F4"></p><p>\u53EF\u4EE5\u91C7\u7528\u6D88\u606F\u961F\u5217\u7684\u65B9\u5F0F\uFF1A</p><ol><li>\u91C7\u7528Redis\u672C\u8EAB\u7684Pub/Sub\u673A\u5236\uFF0C\u5206\u5E03\u5F0F\u96C6\u7FA4\u7684\u6240\u6709\u8282\u70B9\u8BA2\u9605\u5220\u9664\u672C\u5730\u7F13\u5B58\u9891\u9053\uFF0C\u5220\u9664Redis\u7F13\u5B58\u7684\u8282\u70B9\uFF0C\u540C\u4E8B\u53D1\u5E03\u5220\u9664\u672C\u5730\u7F13\u5B58\u6D88\u606F\uFF0C\u8BA2\u9605\u8005\u4EEC\u8BA2\u9605\u5230\u6D88\u606F\u540E\uFF0C\u5220\u9664\u5BF9\u5E94\u7684\u672C\u5730key\u3002 \u4F46\u662FRedis\u7684\u53D1\u5E03\u8BA2\u9605\u4E0D\u662F\u53EF\u9760\u7684\uFF0C\u4E0D\u80FD\u4FDD\u8BC1\u4E00\u5B9A\u5220\u9664\u6210\u529F\u3002</li><li>\u5F15\u5165\u4E13\u4E1A\u7684\u6D88\u606F\u961F\u5217\uFF0C\u6BD4\u5982RocketMQ\uFF0C\u4FDD\u8BC1\u6D88\u606F\u7684\u53EF\u9760\u6027\uFF0C\u4F46\u662F\u589E\u52A0\u4E86\u7CFB\u7EDF\u7684\u590D\u6742\u5EA6\u3002</li><li>\u8BBE\u7F6E\u9002\u5F53\u7684\u8FC7\u671F\u65F6\u95F4\u515C\u5E95\uFF0C\u672C\u5730\u7F13\u5B58\u53EF\u4EE5\u8BBE\u7F6E\u76F8\u5BF9\u77ED\u4E00\u4E9B\u7684\u8FC7\u671F\u65F6\u95F4\u3002</li></ol><h3 id="_30-\u600E\u4E48\u5904\u7406\u70EDkey" tabindex="-1"><a class="header-anchor" href="#_30-\u600E\u4E48\u5904\u7406\u70EDkey" aria-hidden="true">#</a> 30.\u600E\u4E48\u5904\u7406\u70EDkey\uFF1F</h3><blockquote><p><strong>\u4EC0\u4E48\u662F\u70EDKey\uFF1F</strong> \u6240\u8C13\u7684\u70EDkey\uFF0C\u5C31\u662F\u8BBF\u95EE\u9891\u7387\u6BD4\u8F83\u7684key\u3002</p></blockquote><p>\u6BD4\u5982\uFF0C\u70ED\u95E8\u65B0\u95FB\u4E8B\u4EF6\u6216\u5546\u54C1\uFF0C\u8FD9\u7C7Bkey\u901A\u5E38\u6709\u5927\u6D41\u91CF\u7684\u8BBF\u95EE\uFF0C\u5BF9\u5B58\u50A8\u8FD9\u7C7B\u4FE1\u606F\u7684 Redis\u6765\u8BF4\uFF0C\u662F\u4E0D\u5C0F\u7684\u538B\u529B\u3002</p><p>\u5047\u5982Redis\u96C6\u7FA4\u90E8\u7F72\uFF0C\u70EDkey\u53EF\u80FD\u4F1A\u9020\u6210\u6574\u4F53\u6D41\u91CF\u7684\u4E0D\u5747\u8861\uFF0C\u4E2A\u522B\u8282\u70B9\u51FA\u73B0OPS\u8FC7\u5927\u7684\u60C5\u51B5\uFF0C\u6781\u7AEF\u60C5\u51B5\u4E0B\u70ED\u70B9key\u751A\u81F3\u4F1A\u8D85\u8FC7 Redis\u672C\u8EAB\u80FD\u591F\u627F\u53D7\u7684OPS\u3002</p><blockquote><p><strong>\u600E\u4E48\u5904\u7406\u70EDkey\uFF1F</strong></p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-6fa972ec-5531-48f2-a608-4465d79d4518.png" alt="\u70EDkey\u5904\u7406"> \u5BF9\u70EDkey\u7684\u5904\u7406\uFF0C\u6700\u5173\u952E\u7684\u662F\u5BF9\u70ED\u70B9key\u7684\u76D1\u63A7\uFF0C\u53EF\u4EE5\u4ECE\u8FD9\u4E9B\u7AEF\u6765\u76D1\u63A7\u70ED\u70B9key:</p><ol><li><p>\u5BA2\u6237\u7AEF \u5BA2\u6237\u7AEF\u5176\u5B9E\u662F\u8DDD\u79BBkey\u201C\u6700\u8FD1\u201D\u7684\u5730\u65B9\uFF0C\u56E0\u4E3ARedis\u547D\u4EE4\u5C31\u662F\u4ECE\u5BA2\u6237\u7AEF\u53D1\u51FA\u7684\uFF0C\u4F8B\u5982\u5728\u5BA2\u6237\u7AEF\u8BBE\u7F6E\u5168\u5C40\u5B57\u5178\uFF08key\u548C\u8C03\u7528\u6B21\u6570\uFF09\uFF0C\u6BCF\u6B21\u8C03\u7528Redis\u547D\u4EE4\u65F6\uFF0C\u4F7F\u7528\u8FD9\u4E2A\u5B57\u5178\u8FDB\u884C\u8BB0\u5F55\u3002</p></li><li><p>\u4EE3\u7406\u7AEF \u50CFTwemproxy\u3001Codis\u8FD9\u4E9B\u57FA\u4E8E\u4EE3\u7406\u7684Redis\u5206\u5E03\u5F0F\u67B6\u6784\uFF0C\u6240\u6709\u5BA2\u6237\u7AEF\u7684\u8BF7\u6C42\u90FD\u662F\u901A\u8FC7\u4EE3\u7406\u7AEF\u5B8C\u6210\u7684\uFF0C\u53EF\u4EE5\u5728\u4EE3\u7406\u7AEF\u8FDB\u884C\u6536\u96C6\u7EDF\u8BA1\u3002</p></li><li><p>Redis\u670D\u52A1\u7AEF \u4F7F\u7528monitor\u547D\u4EE4\u7EDF\u8BA1\u70ED\u70B9key\u662F\u5F88\u591A\u5F00\u53D1\u548C\u8FD0\u7EF4\u4EBA\u5458\u9996\u5148\u60F3\u5230\uFF0Cmonitor\u547D\u4EE4\u53EF\u4EE5\u76D1\u63A7\u5230Redis\u6267\u884C\u7684\u6240\u6709\u547D\u4EE4\u3002</p></li></ol><p>\u53EA\u8981\u76D1\u63A7\u5230\u4E86\u70EDkey\uFF0C\u5BF9\u70EDkey\u7684\u5904\u7406\u5C31\u7B80\u5355\u4E86\uFF1A</p><ol><li><p>\u628A\u70EDkey\u6253\u6563\u5230\u4E0D\u540C\u7684\u670D\u52A1\u5668\uFF0C\u964D\u4F4E\u538B\u2F12</p></li><li><p>\u52A0\u2F0A\u2F06\u7EA7\u7F13\u5B58\uFF0C\u63D0\u524D\u52A0\u8F7D\u70EDkey\u6570\u636E\u5230\u5185\u5B58\u4E2D\uFF0C\u5982\u679Credis\u5B95\u673A\uFF0C\u2F9B\u5185\u5B58\u67E5\u8BE2</p></li></ol><h3 id="_31-\u7F13\u5B58\u9884\u70ED\u600E\u4E48\u505A\u5462" tabindex="-1"><a class="header-anchor" href="#_31-\u7F13\u5B58\u9884\u70ED\u600E\u4E48\u505A\u5462" aria-hidden="true">#</a> 31.\u7F13\u5B58\u9884\u70ED\u600E\u4E48\u505A\u5462\uFF1F</h3><p>\u6240\u8C13\u7F13\u5B58\u9884\u70ED\uFF0C\u5C31\u662F\u63D0\u524D\u628A\u6570\u636E\u5E93\u91CC\u7684\u6570\u636E\u5237\u5230\u7F13\u5B58\u91CC\uFF0C\u901A\u5E38\u6709\u8FD9\u4E9B\u65B9\u6CD5\uFF1A</p><p>1\u3001\u76F4\u63A5\u5199\u4E2A\u7F13\u5B58\u5237\u65B0\u9875\u9762\u6216\u8005\u63A5\u53E3\uFF0C\u4E0A\u7EBF\u65F6\u624B\u52A8\u64CD\u4F5C</p><p>2\u3001\u6570\u636E\u91CF\u4E0D\u5927\uFF0C\u53EF\u4EE5\u5728\u9879\u76EE\u542F\u52A8\u7684\u65F6\u5019\u81EA\u52A8\u8FDB\u884C\u52A0\u8F7D</p><p>3\u3001\u5B9A\u65F6\u4EFB\u52A1\u5237\u65B0\u7F13\u5B58.</p><h3 id="_32-\u70ED\u70B9key\u91CD\u5EFA-\u95EE\u9898-\u89E3\u51B3" tabindex="-1"><a class="header-anchor" href="#_32-\u70ED\u70B9key\u91CD\u5EFA-\u95EE\u9898-\u89E3\u51B3" aria-hidden="true">#</a> 32.\u70ED\u70B9key\u91CD\u5EFA\uFF1F\u95EE\u9898\uFF1F\u89E3\u51B3\uFF1F</h3><p>\u5F00\u53D1\u7684\u65F6\u5019\u4E00\u822C\u4F7F\u7528\u201C\u7F13\u5B58+\u8FC7\u671F\u65F6\u95F4\u201D\u7684\u7B56\u7565\uFF0C\u65E2\u53EF\u4EE5\u52A0\u901F\u6570\u636E\u8BFB\u5199\uFF0C\u53C8\u4FDD\u8BC1\u6570\u636E\u7684\u5B9A\u671F\u66F4\u65B0\uFF0C\u8FD9\u79CD\u6A21\u5F0F\u57FA\u672C\u80FD\u591F\u6EE1\u8DB3\u7EDD\u5927\u90E8\u5206\u9700\u6C42\u3002</p><p>\u4F46\u662F\u6709\u4E24\u4E2A\u95EE\u9898\u5982\u679C\u540C\u65F6\u51FA\u73B0\uFF0C\u53EF\u80FD\u5C31\u4F1A\u51FA\u73B0\u6BD4\u8F83\u5927\u7684\u95EE\u9898\uFF1A</p><ul><li><p>\u5F53\u524Dkey\u662F\u4E00\u4E2A\u70ED\u70B9key\uFF08\u4F8B\u5982\u4E00\u4E2A\u70ED\u95E8\u7684\u5A31\u4E50\u65B0\u95FB\uFF09\uFF0C\u5E76\u53D1\u91CF\u975E\u5E38\u5927\u3002</p></li><li><p>\u91CD\u5EFA\u7F13\u5B58\u4E0D\u80FD\u5728\u77ED\u65F6\u95F4\u5B8C\u6210\uFF0C\u53EF\u80FD\u662F\u4E00\u4E2A\u590D\u6742\u8BA1\u7B97\uFF0C\u4F8B\u5982\u590D\u6742\u7684 SQL\u3001\u591A\u6B21IO\u3001\u591A\u4E2A\u4F9D\u8D56\u7B49\u3002 \u5728\u7F13\u5B58\u5931\u6548\u7684\u77AC\u95F4\uFF0C\u6709\u5927\u91CF\u7EBF\u7A0B\u6765\u91CD\u5EFA\u7F13\u5B58\uFF0C\u9020\u6210\u540E\u7AEF\u8D1F\u8F7D\u52A0\u5927\uFF0C\u751A\u81F3\u53EF\u80FD\u4F1A\u8BA9\u5E94\u7528\u5D29\u6E83\u3002</p></li></ul><blockquote><p><strong>\u600E\u4E48\u5904\u7406\u5462\uFF1F</strong></p></blockquote><p>\u8981\u89E3\u51B3\u8FD9\u4E2A\u95EE\u9898\u4E5F\u4E0D\u662F\u5F88\u590D\u6742\uFF0C\u89E3\u51B3\u95EE\u9898\u7684\u8981\u70B9\u5728\u4E8E\uFF1A</p><ul><li>\u51CF\u5C11\u91CD\u5EFA\u7F13\u5B58\u7684\u6B21\u6570\u3002</li><li>\u6570\u636E\u5C3D\u53EF\u80FD\u4E00\u81F4\u3002</li><li>\u8F83\u5C11\u7684\u6F5C\u5728\u5371\u9669\u3002</li></ul><p>\u6240\u4EE5\u4E00\u822C\u91C7\u7528\u5982\u4E0B\u65B9\u5F0F\uFF1A</p><ol><li>\u4E92\u65A5\u9501\uFF08mutex key\uFF09 \u8FD9\u79CD\u65B9\u6CD5\u53EA\u5141\u8BB8\u4E00\u4E2A\u7EBF\u7A0B\u91CD\u5EFA\u7F13\u5B58\uFF0C\u5176\u4ED6\u7EBF\u7A0B\u7B49\u5F85\u91CD\u5EFA\u7F13\u5B58\u7684\u7EBF\u7A0B\u6267\u884C\u5B8C\uFF0C\u91CD\u65B0\u4ECE\u7F13\u5B58\u83B7\u53D6\u6570\u636E\u5373\u53EF\u3002</li><li>\u6C38\u8FDC\u4E0D\u8FC7\u671F \u201C\u6C38\u8FDC\u4E0D\u8FC7\u671F\u201D\u5305\u542B\u4E24\u5C42\u610F\u601D\uFF1A</li></ol><ul><li>\u4ECE\u7F13\u5B58\u5C42\u9762\u6765\u770B\uFF0C\u786E\u5B9E\u6CA1\u6709\u8BBE\u7F6E\u8FC7\u671F\u65F6\u95F4\uFF0C\u6240\u4EE5\u4E0D\u4F1A\u51FA\u73B0\u70ED\u70B9key\u8FC7\u671F\u540E\u4EA7\u751F\u7684\u95EE\u9898\uFF0C\u4E5F\u5C31\u662F\u201C\u7269\u7406\u201D\u4E0D\u8FC7\u671F\u3002</li><li>\u4ECE\u529F\u80FD\u5C42\u9762\u6765\u770B\uFF0C\u4E3A\u6BCF\u4E2Avalue\u8BBE\u7F6E\u4E00\u4E2A\u903B\u8F91\u8FC7\u671F\u65F6\u95F4\uFF0C\u5F53\u53D1\u73B0\u8D85\u8FC7\u903B\u8F91\u8FC7\u671F\u65F6\u95F4\u540E\uFF0C\u4F1A\u4F7F\u7528\u5355\u72EC\u7684\u7EBF\u7A0B\u53BB\u6784\u5EFA\u7F13\u5B58\u3002</li></ul><h3 id="_33-\u65E0\u5E95\u6D1E\u95EE\u9898\u5417-\u5982\u4F55\u89E3\u51B3" tabindex="-1"><a class="header-anchor" href="#_33-\u65E0\u5E95\u6D1E\u95EE\u9898\u5417-\u5982\u4F55\u89E3\u51B3" aria-hidden="true">#</a> 33.\u65E0\u5E95\u6D1E\u95EE\u9898\u5417\uFF1F\u5982\u4F55\u89E3\u51B3\uFF1F</h3><blockquote><p><strong>\u4EC0\u4E48\u662F\u65E0\u5E95\u6D1E\u95EE\u9898\uFF1F</strong></p></blockquote><p>2010\u5E74\uFF0CFacebook\u7684Memcache\u8282\u70B9\u5DF2\u7ECF\u8FBE\u5230\u4E863000\u4E2A\uFF0C\u627F\u8F7D\u7740TB\u7EA7\u522B\u7684\u7F13\u5B58\u6570\u636E\u3002\u4F46\u5F00\u53D1\u548C\u8FD0\u7EF4\u4EBA\u5458\u53D1\u73B0\u4E86\u4E00\u4E2A\u95EE\u9898\uFF0C\u4E3A\u4E86\u6EE1\u8DB3\u4E1A\u52A1\u8981\u6C42\u6DFB\u52A0\u4E86\u5927\u91CF\u65B0Memcache\u8282\u70B9\uFF0C\u4F46\u662F\u53D1\u73B0\u6027\u80FD\u4E0D\u4F46\u6CA1\u6709\u597D\u8F6C\u53CD\u800C\u4E0B\u964D\u4E86\uFF0C\u5F53\u65F6\u5C06\u8FD9 \u79CD\u73B0\u8C61\u79F0\u4E3A\u7F13\u5B58\u7684\u201C<strong>\u65E0\u5E95\u6D1E</strong>\u201D\u73B0\u8C61\u3002</p><p>\u90A3\u4E48\u4E3A\u4EC0\u4E48\u4F1A\u4EA7\u751F\u8FD9\u79CD\u73B0\u8C61\u5462?</p><p>\u901A\u5E38\u6765\u8BF4\u6DFB\u52A0\u8282\u70B9\u4F7F\u5F97Memcache\u96C6\u7FA4 \u6027\u80FD\u5E94\u8BE5\u66F4\u5F3A\u4E86\uFF0C\u4F46\u4E8B\u5B9E\u5E76\u975E\u5982\u6B64\u3002\u952E\u503C\u6570\u636E\u5E93\u7531\u4E8E\u901A\u5E38\u91C7\u7528\u54C8\u5E0C\u51FD\u6570\u5C06 key\u6620\u5C04\u5230\u5404\u4E2A\u8282\u70B9\u4E0A\uFF0C\u9020\u6210key\u7684\u5206\u5E03\u4E0E\u4E1A\u52A1\u65E0\u5173\uFF0C\u4F46\u662F\u7531\u4E8E\u6570\u636E\u91CF\u548C\u8BBF\u95EE\u91CF\u7684\u6301\u7EED\u589E\u957F\uFF0C\u9020\u6210\u9700\u8981\u6DFB\u52A0\u5927\u91CF\u8282\u70B9\u505A\u6C34\u5E73\u6269\u5BB9\uFF0C\u5BFC\u81F4\u952E\u503C\u5206\u5E03\u5230\u66F4\u591A\u7684 \u8282\u70B9\u4E0A\uFF0C\u6240\u4EE5\u65E0\u8BBA\u662FMemcache\u8FD8\u662FRedis\u7684\u5206\u5E03\u5F0F\uFF0C\u6279\u91CF\u64CD\u4F5C\u901A\u5E38\u9700\u8981\u4ECE\u4E0D\u540C\u8282\u70B9\u4E0A\u83B7\u53D6\uFF0C\u76F8\u6BD4\u4E8E\u5355\u673A\u6279\u91CF\u64CD\u4F5C\u53EA\u6D89\u53CA\u4E00\u6B21\u7F51\u7EDC\u64CD\u4F5C\uFF0C\u5206\u5E03\u5F0F\u6279\u91CF\u64CD\u4F5C\u4F1A\u6D89\u53CA\u591A\u6B21\u7F51\u7EDC\u65F6\u95F4\u3002</p><blockquote><p><strong>\u65E0\u5E95\u6D1E\u95EE\u9898\u5982\u4F55\u4F18\u5316\u5462\uFF1F</strong></p></blockquote><p>\u5148\u5206\u6790\u4E00\u4E0B\u65E0\u5E95\u6D1E\u95EE\u9898\uFF1A</p><ul><li><p>\u5BA2\u6237\u7AEF\u4E00\u6B21\u6279\u91CF\u64CD\u4F5C\u4F1A\u6D89\u53CA\u591A\u6B21\u7F51\u7EDC\u64CD\u4F5C\uFF0C\u4E5F\u5C31\u610F\u5473\u7740\u6279\u91CF\u64CD\u4F5C\u4F1A\u968F\u7740\u8282\u70B9\u7684\u589E\u591A\uFF0C\u8017\u65F6\u4F1A\u4E0D\u65AD\u589E\u5927\u3002</p></li><li><p>\u7F51\u7EDC\u8FDE\u63A5\u6570\u53D8\u591A\uFF0C\u5BF9\u8282\u70B9\u7684\u6027\u80FD\u4E5F\u6709\u4E00\u5B9A\u5F71\u54CD\u3002</p></li></ul><p>\u5E38\u89C1\u7684\u4F18\u5316\u601D\u8DEF\u5982\u4E0B\uFF1A</p><ul><li><p>\u547D\u4EE4\u672C\u8EAB\u7684\u4F18\u5316\uFF0C\u4F8B\u5982\u4F18\u5316\u64CD\u4F5C\u8BED\u53E5\u7B49\u3002</p></li><li><p>\u51CF\u5C11\u7F51\u7EDC\u901A\u4FE1\u6B21\u6570\u3002</p></li><li><p>\u964D\u4F4E\u63A5\u5165\u6210\u672C\uFF0C\u4F8B\u5982\u5BA2\u6237\u7AEF\u4F7F\u7528\u957F\u8FDE/\u8FDE\u63A5\u6C60\u3001NIO\u7B49\u3002</p></li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><h2 id="redis\u8FD0\u7EF4" tabindex="-1"><a class="header-anchor" href="#redis\u8FD0\u7EF4" aria-hidden="true">#</a> Redis\u8FD0\u7EF4</h2><h3 id="_34-redis\u62A5\u5185\u5B58\u4E0D\u8DB3\u600E\u4E48\u5904\u7406" tabindex="-1"><a class="header-anchor" href="#_34-redis\u62A5\u5185\u5B58\u4E0D\u8DB3\u600E\u4E48\u5904\u7406" aria-hidden="true">#</a> 34.Redis\u62A5\u5185\u5B58\u4E0D\u8DB3\u600E\u4E48\u5904\u7406\uFF1F</h3><p>Redis \u5185\u5B58\u4E0D\u8DB3\u6709\u8FD9\u4E48\u51E0\u79CD\u5904\u7406\u65B9\u5F0F\uFF1A</p><ul><li>\u4FEE\u6539\u914D\u7F6E\u6587\u4EF6 redis.conf \u7684 maxmemory \u53C2\u6570\uFF0C\u589E\u52A0 Redis \u53EF\u7528\u5185\u5B58</li><li>\u4E5F\u53EF\u4EE5\u901A\u8FC7\u547D\u4EE4set maxmemory\u52A8\u6001\u8BBE\u7F6E\u5185\u5B58\u4E0A\u9650</li><li>\u4FEE\u6539\u5185\u5B58\u6DD8\u6C70\u7B56\u7565\uFF0C\u53CA\u65F6\u91CA\u653E\u5185\u5B58\u7A7A\u95F4</li><li>\u4F7F\u7528 Redis \u96C6\u7FA4\u6A21\u5F0F\uFF0C\u8FDB\u884C\u6A2A\u5411\u6269\u5BB9\u3002</li></ul><h3 id="_35-redis\u7684\u8FC7\u671F\u6570\u636E\u56DE\u6536\u7B56\u7565\u6709\u54EA\u4E9B" tabindex="-1"><a class="header-anchor" href="#_35-redis\u7684\u8FC7\u671F\u6570\u636E\u56DE\u6536\u7B56\u7565\u6709\u54EA\u4E9B" aria-hidden="true">#</a> 35.Redis\u7684\u8FC7\u671F\u6570\u636E\u56DE\u6536\u7B56\u7565\u6709\u54EA\u4E9B\uFF1F</h3><p>Redis\u4E3B\u8981\u67092\u79CD\u8FC7\u671F\u6570\u636E\u56DE\u6536\u7B56\u7565\uFF1A <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-de726c67-e56f-4f4b-96be-5cb998659541.png" alt="\u5728\u8FD9\u91CC\u63D2\u5165\u56FE\u7247\u63CF\u8FF0"></p><p><strong>\u60F0\u6027\u5220\u9664</strong></p><p>\u60F0\u6027\u5220\u9664\u6307\u7684\u662F\u5F53\u6211\u4EEC\u67E5\u8BE2key\u7684\u65F6\u5019\u624D\u5BF9key\u8FDB\u2F8F\u68C0\u6D4B\uFF0C\u5982\u679C\u5DF2\u7ECF\u8FBE\u5230\u8FC7\u671F\u65F6\u95F4\uFF0C\u5219\u5220\u9664\u3002\u663E\u7136\uFF0C\u4ED6\u6709\u2F00\u4E2A\u7F3A\u70B9\u5C31\u662F\u5982\u679C\u8FD9\u4E9B\u8FC7\u671F\u7684key\u6CA1\u6709\u88AB\u8BBF\u95EE\uFF0C\u90A3\u4E48\u4ED6\u5C31\u2F00\u76F4\u2F46\u6CD5\u88AB\u5220\u9664\uFF0C\u2F7D\u4E14\u2F00\u76F4\u5360\u2F64\u5185\u5B58\u3002</p><p><strong>\u5B9A\u671F\u5220\u9664</strong></p><p>\u5B9A\u671F\u5220\u9664\u6307\u7684\u662FRedis\u6BCF\u9694\u2F00\u6BB5\u65F6\u95F4\u5BF9\u6570\u636E\u5E93\u505A\u2F00\u6B21\u68C0\u67E5\uFF0C\u5220\u9664\u2FA5\u2FAF\u7684\u8FC7\u671Fkey\u3002\u7531\u4E8E\u4E0D\u53EF\u80FD\u5BF9\u6240\u6709key\u53BB\u505A\u8F6E\u8BE2\u6765\u5220\u9664\uFF0C\u6240\u4EE5Redis\u4F1A\u6BCF\u6B21\u968F\u673A\u53D6\u2F00\u4E9Bkey\u53BB\u505A\u68C0\u67E5\u548C\u5220\u9664\u3002</p><h3 id="_36-redis\u6709\u54EA\u4E9B\u5185\u5B58\u6EA2\u51FA\u63A7\u5236-\u5185\u5B58\u6DD8\u6C70\u7B56\u7565" tabindex="-1"><a class="header-anchor" href="#_36-redis\u6709\u54EA\u4E9B\u5185\u5B58\u6EA2\u51FA\u63A7\u5236-\u5185\u5B58\u6DD8\u6C70\u7B56\u7565" aria-hidden="true">#</a> 36.Redis\u6709\u54EA\u4E9B\u5185\u5B58\u6EA2\u51FA\u63A7\u5236/\u5185\u5B58\u6DD8\u6C70\u7B56\u7565\uFF1F</h3><p>Redis\u6240\u7528\u5185\u5B58\u8FBE\u5230maxmemory\u4E0A\u9650\u65F6\u4F1A\u89E6\u53D1\u76F8\u5E94\u7684\u6EA2\u51FA\u63A7\u5236\u7B56\u7565\uFF0CRedis\u652F\u6301\u516D\u79CD\u7B56\u7565\uFF1A <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-5be7405c-ee11-4d2b-bea4-9598f10a1b17.png" alt="Redis\u516D\u79CD\u5185\u5B58\u6EA2\u51FA\u63A7\u5236\u7B56\u7565"></p><ol><li>noeviction\uFF1A\u9ED8\u8BA4\u7B56\u7565\uFF0C\u4E0D\u4F1A\u5220\u9664\u4EFB\u4F55\u6570\u636E\uFF0C\u62D2\u7EDD\u6240\u6709\u5199\u5165\u64CD\u4F5C\u5E76\u8FD4 \u56DE\u5BA2\u6237\u7AEF\u9519\u8BEF\u4FE1\u606F\uFF0C\u6B64 \u65F6Redis\u53EA\u54CD\u5E94\u8BFB\u64CD\u4F5C\u3002</li><li>volatile-lru\uFF1A\u6839\u636ELRU\u7B97\u6CD5\u5220\u9664\u8BBE\u7F6E\u4E86\u8D85\u65F6\u5C5E\u6027\uFF08expire\uFF09\u7684\u952E\uFF0C\u76F4 \u5230\u817E\u51FA\u8DB3\u591F\u7A7A\u95F4\u4E3A\u6B62\u3002\u5982\u679C\u6CA1\u6709\u53EF\u5220\u9664\u7684\u952E\u5BF9\u8C61\uFF0C\u56DE\u9000\u5230noeviction\u7B56\u7565\u3002</li><li>allkeys-lru\uFF1A\u6839\u636ELRU\u7B97\u6CD5\u5220\u9664\u952E\uFF0C\u4E0D\u7BA1\u6570\u636E\u6709\u6CA1\u6709\u8BBE\u7F6E\u8D85\u65F6\u5C5E\u6027\uFF0C \u76F4\u5230\u817E\u51FA\u8DB3\u591F\u7A7A\u95F4\u4E3A\u6B62\u3002</li><li>allkeys-random\uFF1A\u968F\u673A\u5220\u9664\u6240\u6709\u952E\uFF0C\u76F4\u5230\u817E\u51FA\u8DB3\u591F\u7A7A\u95F4\u4E3A\u6B62\u3002</li><li>volatile-random\uFF1A\u968F\u673A\u5220\u9664\u8FC7\u671F\u952E\uFF0C\u76F4\u5230\u817E\u51FA\u8DB3\u591F\u7A7A\u95F4\u4E3A\u6B62\u3002</li><li>volatile-ttl\uFF1A\u6839\u636E\u952E\u503C\u5BF9\u8C61\u7684ttl\u5C5E\u6027\uFF0C\u5220\u9664\u6700\u8FD1\u5C06\u8981\u8FC7\u671F\u6570\u636E\u3002\u5982\u679C \u6CA1\u6709\uFF0C\u56DE\u9000\u5230noeviction\u7B56\u7565\u3002</li></ol><h3 id="_37-redis\u963B\u585E-\u600E\u4E48\u89E3\u51B3" tabindex="-1"><a class="header-anchor" href="#_37-redis\u963B\u585E-\u600E\u4E48\u89E3\u51B3" aria-hidden="true">#</a> 37.Redis\u963B\u585E\uFF1F\u600E\u4E48\u89E3\u51B3\uFF1F</h3><p>Redis\u53D1\u751F\u963B\u585E\uFF0C\u53EF\u4EE5\u4ECE\u4EE5\u4E0B\u51E0\u4E2A\u65B9\u9762\u6392\u67E5\uFF1A <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-e6a35258-7a78-4489-90b7-e47a4190802b.png" alt="Redis\u963B\u585E\u6392\u67E5"></p><ul><li><p><strong>API\u6216\u6570\u636E\u7ED3\u6784\u4F7F\u7528\u4E0D\u5408\u7406</strong></p><p>\u901A\u5E38Redis\u6267\u884C\u547D\u4EE4\u901F\u5EA6\u975E\u5E38\u5FEB\uFF0C\u4F46\u662F\u4E0D\u5408\u7406\u5730\u4F7F\u7528\u547D\u4EE4\uFF0C\u53EF\u80FD\u4F1A\u5BFC\u81F4\u6267\u884C\u901F\u5EA6\u5F88\u6162\uFF0C\u5BFC\u81F4\u963B\u585E\uFF0C\u5BF9\u4E8E\u9AD8\u5E76\u53D1\u7684\u573A\u666F\uFF0C\u5E94\u8BE5\u5C3D\u91CF\u907F\u514D\u5728\u5927\u5BF9\u8C61\u4E0A\u6267\u884C\u7B97\u6CD5\u590D\u6742 \u5EA6\u8D85\u8FC7O\uFF08n\uFF09\u7684\u547D\u4EE4\u3002</p><p>\u5BF9\u6162\u67E5\u8BE2\u7684\u5904\u7406\u5206\u4E3A\u4E24\u6B65\uFF1A</p><ol><li>\u53D1\u73B0\u6162\u67E5\u8BE2\uFF1A slowlog get{n}\u547D\u4EE4\u53EF\u4EE5\u83B7\u53D6\u6700\u8FD1 \u7684n\u6761\u6162\u67E5\u8BE2\u547D\u4EE4\uFF1B</li><li>\u53D1\u73B0\u6162\u67E5\u8BE2\u540E\uFF0C\u53EF\u4EE5\u4ECE\u4E24\u4E2A\u65B9\u5411\u53BB\u4F18\u5316\u6162\u67E5\u8BE2\uFF1A 1\uFF09\u4FEE\u6539\u4E3A\u4F4E\u7B97\u6CD5\u590D\u6742\u5EA6\u7684\u547D\u4EE4\uFF0C\u5982hgetall\u6539\u4E3Ahmget\u7B49\uFF0C\u7981\u7528keys\u3001sort\u7B49\u547D \u4EE4 2\uFF09\u8C03\u6574\u5927\u5BF9\u8C61\uFF1A\u7F29\u51CF\u5927\u5BF9\u8C61\u6570\u636E\u6216\u628A\u5927\u5BF9\u8C61\u62C6\u5206\u4E3A\u591A\u4E2A\u5C0F\u5BF9\u8C61\uFF0C\u9632\u6B62\u4E00\u6B21\u547D\u4EE4\u64CD\u4F5C\u8FC7\u591A\u7684\u6570\u636E\u3002</li></ol></li><li><p><strong>CPU\u9971\u548C\u7684\u95EE\u9898</strong></p><p>\u5355\u7EBF\u7A0B\u7684Redis\u5904\u7406\u547D\u4EE4\u65F6\u53EA\u80FD\u4F7F\u7528\u4E00\u4E2ACPU\u3002\u800CCPU\u9971\u548C\u662F\u6307Redis\u5355\u6838CPU\u4F7F\u7528\u7387\u8DD1\u5230\u63A5\u8FD1100%\u3002</p><p>\u9488\u5BF9\u8FD9\u79CD\u60C5\u51B5\uFF0C\u5904\u7406\u6B65\u9AA4\u4E00\u822C\u5982\u4E0B\uFF1A</p><ol><li>\u5224\u65AD\u5F53\u524DRedis\u5E76\u53D1\u91CF\u662F\u5426\u5DF2\u7ECF\u8FBE\u5230\u6781\u9650\uFF0C\u53EF\u4EE5\u4F7F\u7528\u7EDF\u8BA1\u547D\u4EE4redis-cli-h{ip}-p{port}--stat\u83B7\u53D6\u5F53\u524D Redis\u4F7F\u7528\u60C5\u51B5</li><li>\u5982\u679CRedis\u7684\u8BF7\u6C42\u51E0\u4E07+\uFF0C\u90A3\u4E48\u5927\u6982\u5C31\u662FRedis\u7684OPS\u5DF2\u7ECF\u5230\u4E86\u6781\u9650\uFF0C\u5E94\u8BE5\u505A\u96C6\u7FA4\u5316\u6C34\u54C1\u6269\u5C55\u6765\u5206\u644AOPS\u538B\u529B</li><li>\u5982\u679C\u53EA\u6709\u51E0\u767E\u51E0\u5343\uFF0C\u90A3\u4E48\u5C31\u5F97\u6392\u67E5\u547D\u4EE4\u548C\u5185\u5B58\u7684\u4F7F\u7528</li></ol></li><li><p><strong>\u6301\u4E45\u5316\u76F8\u5173\u7684\u963B\u585E</strong></p><p>\u5BF9\u4E8E\u5F00\u542F\u4E86\u6301\u4E45\u5316\u529F\u80FD\u7684Redis\u8282\u70B9\uFF0C\u9700\u8981\u6392\u67E5\u662F\u5426\u662F\u6301\u4E45\u5316\u5BFC\u81F4\u7684\u963B\u585E\u3002</p><ol><li>fork\u963B\u585E fork\u64CD\u4F5C\u53D1\u751F\u5728RDB\u548CAOF\u91CD\u5199\u65F6\uFF0CRedis\u4E3B\u7EBF\u7A0B\u8C03\u7528fork\u64CD\u4F5C\u4EA7\u751F\u5171\u4EAB \u5185\u5B58\u7684\u5B50\u8FDB\u7A0B\uFF0C\u7531\u5B50\u8FDB\u7A0B\u5B8C\u6210\u6301\u4E45\u5316\u6587\u4EF6\u91CD\u5199\u5DE5\u4F5C\u3002\u5982\u679Cfork\u64CD\u4F5C\u672C\u8EAB\u8017\u65F6\u8FC7\u957F\uFF0C\u5FC5\u7136\u4F1A\u5BFC\u81F4\u4E3B\u7EBF\u7A0B\u7684\u963B\u585E\u3002</li><li>AOF\u5237\u76D8\u963B\u585E \u5F53\u6211\u4EEC\u5F00\u542FAOF\u6301\u4E45\u5316\u529F\u80FD\u65F6\uFF0C\u6587\u4EF6\u5237\u76D8\u7684\u65B9\u5F0F\u4E00\u822C\u91C7\u7528\u6BCF\u79D2\u4E00\u6B21\uFF0C\u540E\u53F0\u7EBF\u7A0B\u6BCF\u79D2\u5BF9AOF\u6587\u4EF6\u505Afsync\u64CD\u4F5C\u3002\u5F53\u786C\u76D8\u538B\u529B\u8FC7\u5927\u65F6\uFF0Cfsync\u64CD\u4F5C\u9700\u8981\u7B49 \u5F85\uFF0C\u76F4\u5230\u5199\u5165\u5B8C\u6210\u3002\u5982\u679C\u4E3B\u7EBF\u7A0B\u53D1\u73B0\u8DDD\u79BB\u4E0A\u4E00\u6B21\u7684fsync\u6210\u529F\u8D85\u8FC72\u79D2\uFF0C\u4E3A\u4E86 \u6570\u636E\u5B89\u5168\u6027\u5B83\u4F1A\u963B\u585E\u76F4\u5230\u540E\u53F0\u7EBF\u7A0B\u6267\u884Cfsync\u64CD\u4F5C\u5B8C\u6210\u3002</li><li>HugePage\u5199\u64CD\u4F5C\u963B\u585E \u5BF9\u4E8E\u5F00\u542FTransparent HugePages\u7684 \u64CD\u4F5C\u7CFB\u7EDF\uFF0C\u6BCF\u6B21\u5199\u547D\u4EE4\u5F15\u8D77\u7684\u590D\u5236\u5185\u5B58\u9875\u5355\u4F4D\u75314K\u53D8\u4E3A2MB\uFF0C\u653E\u5927\u4E86512 \u500D\uFF0C\u4F1A\u62D6\u6162\u5199\u64CD\u4F5C\u7684\u6267\u884C\u65F6\u95F4\uFF0C\u5BFC\u81F4\u5927\u91CF\u5199\u64CD\u4F5C\u6162\u67E5\u8BE2\u3002</li></ol></li></ul><h3 id="_38-\u5927key\u95EE\u9898\u4E86\u89E3\u5417" tabindex="-1"><a class="header-anchor" href="#_38-\u5927key\u95EE\u9898\u4E86\u89E3\u5417" aria-hidden="true">#</a> 38.\u5927key\u95EE\u9898\u4E86\u89E3\u5417\uFF1F</h3><p>Redis\u4F7F\u7528\u8FC7\u7A0B\u4E2D\uFF0C\u6709\u65F6\u5019\u4F1A\u51FA\u73B0\u5927key\u7684\u60C5\u51B5\uFF0C \u6BD4\u5982\uFF1A</p><ul><li>\u5355\u4E2A\u7B80\u5355\u7684key\u5B58\u50A8\u7684value\u5F88\u5927\uFF0Csize\u8D85\u8FC710KB</li><li>hash\uFF0C set\uFF0Czset\uFF0Clist \u4E2D\u5B58\u50A8\u8FC7\u591A\u7684\u5143\u7D20\uFF08\u4EE5\u4E07\u4E3A\u5355\u4F4D\uFF09</li></ul><blockquote><p><strong>\u5927key\u4F1A\u9020\u6210\u4EC0\u4E48\u95EE\u9898\u5462\uFF1F</strong></p></blockquote><ul><li>\u5BA2\u6237\u7AEF\u8017\u65F6\u589E\u52A0\uFF0C\u751A\u81F3\u8D85\u65F6</li><li>\u5BF9\u5927key\u8FDB\u884CIO\u64CD\u4F5C\u65F6\uFF0C\u4F1A\u4E25\u91CD\u5360\u7528\u5E26\u5BBD\u548CCPU</li><li>\u9020\u6210Redis\u96C6\u7FA4\u4E2D\u6570\u636E\u503E\u659C</li><li>\u4E3B\u52A8\u5220\u9664\u3001\u88AB\u52A8\u5220\u7B49\uFF0C\u53EF\u80FD\u4F1A\u5BFC\u81F4\u963B\u585E</li></ul><blockquote><p><strong>\u5982\u4F55\u627E\u5230\u5927key?</strong></p></blockquote><ul><li>bigkeys\u547D\u4EE4\uFF1A\u4F7F\u7528bigkeys\u547D\u4EE4\u4EE5\u904D\u5386\u7684\u65B9\u5F0F\u5206\u6790Redis\u5B9E\u4F8B\u4E2D\u7684\u6240\u6709Key\uFF0C\u5E76\u8FD4\u56DE\u6574\u4F53\u7EDF\u8BA1\u4FE1\u606F\u4E0E\u6BCF\u4E2A\u6570\u636E\u7C7B\u578B\u4E2DTop1\u7684\u5927Key</li><li>redis-rdb-tools\uFF1Aredis-rdb-tools\u662F\u7531Python\u5199\u7684\u7528\u6765\u5206\u6790Redis\u7684rdb\u5FEB\u7167\u6587\u4EF6\u7528\u7684\u5DE5\u5177\uFF0C\u5B83\u53EF\u4EE5\u628Ardb\u5FEB\u7167\u6587\u4EF6\u751F\u6210json\u6587\u4EF6\u6216\u8005\u751F\u6210\u62A5\u8868\u7528\u6765\u5206\u6790Redis\u7684\u4F7F\u7528\u8BE6\u60C5\u3002</li></ul><blockquote><p><strong>\u5982\u4F55\u5904\u7406\u5927key?</strong></p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-e4aaafda-fce1-47f0-8b2b-7261d47b720b.png" alt="\u5927key\u5904\u7406"></p><ul><li><p><strong>\u5220\u9664\u5927key</strong></p><ul><li>\u5F53Redis\u7248\u672C\u5927\u4E8E4.0\u65F6\uFF0C\u53EF\u4F7F\u7528UNLINK\u547D\u4EE4\u5B89\u5168\u5730\u5220\u9664\u5927Key\uFF0C\u8BE5\u547D\u4EE4\u80FD\u591F\u4EE5\u975E\u963B\u585E\u7684\u65B9\u5F0F\uFF0C\u9010\u6B65\u5730\u6E05\u7406\u4F20\u5165\u7684Key\u3002</li><li>\u5F53Redis\u7248\u672C\u5C0F\u4E8E4.0\u65F6\uFF0C\u907F\u514D\u4F7F\u7528\u963B\u585E\u5F0F\u547D\u4EE4KEYS\uFF0C\u800C\u662F\u5EFA\u8BAE\u901A\u8FC7SCAN\u547D\u4EE4\u6267\u884C\u589E\u91CF\u8FED\u4EE3\u626B\u63CFkey\uFF0C\u7136\u540E\u5224\u65AD\u8FDB\u884C\u5220\u9664\u3002</li></ul></li><li><p><strong>\u538B\u7F29\u548C\u62C6\u5206key</strong></p><ul><li>\u5F53vaule\u662Fstring\u65F6\uFF0C\u6BD4\u8F83\u96BE\u62C6\u5206\uFF0C\u5219\u4F7F\u7528\u5E8F\u5217\u5316\u3001\u538B\u7F29\u7B97\u6CD5\u5C06key\u7684\u5927\u5C0F\u63A7\u5236\u5728\u5408\u7406\u8303\u56F4\u5185\uFF0C\u4F46\u662F\u5E8F\u5217\u5316\u548C\u53CD\u5E8F\u5217\u5316\u90FD\u4F1A\u5E26\u6765\u66F4\u591A\u65F6\u95F4\u4E0A\u7684\u6D88\u8017\u3002</li><li>\u5F53value\u662Fstring\uFF0C\u538B\u7F29\u4E4B\u540E\u4ECD\u7136\u662F\u5927key\uFF0C\u5219\u9700\u8981\u8FDB\u884C\u62C6\u5206\uFF0C\u4E00\u4E2A\u5927key\u5206\u4E3A\u4E0D\u540C\u7684\u90E8\u5206\uFF0C\u8BB0\u5F55\u6BCF\u4E2A\u90E8\u5206\u7684key\uFF0C\u4F7F\u7528multiget\u7B49\u64CD\u4F5C\u5B9E\u73B0\u4E8B\u52A1\u8BFB\u53D6\u3002</li><li>\u5F53value\u662Flist/set\u7B49\u96C6\u5408\u7C7B\u578B\u65F6\uFF0C\u6839\u636E\u9884\u4F30\u7684\u6570\u636E\u89C4\u6A21\u6765\u8FDB\u884C\u5206\u7247\uFF0C\u4E0D\u540C\u7684\u5143\u7D20\u8BA1\u7B97\u540E\u5206\u5230\u4E0D\u540C\u7684\u7247\u3002</li></ul></li></ul><h3 id="_39-redis\u5E38\u89C1\u6027\u80FD\u95EE\u9898\u548C\u89E3\u51B3\u65B9\u6848" tabindex="-1"><a class="header-anchor" href="#_39-redis\u5E38\u89C1\u6027\u80FD\u95EE\u9898\u548C\u89E3\u51B3\u65B9\u6848" aria-hidden="true">#</a> 39.Redis\u5E38\u89C1\u6027\u80FD\u95EE\u9898\u548C\u89E3\u51B3\u65B9\u6848\uFF1F</h3><ol><li>Master \u6700\u597D\u4E0D\u8981\u505A\u4EFB\u4F55\u6301\u4E45\u5316\u5DE5\u4F5C\uFF0C\u5305\u62EC\u5185\u5B58\u5FEB\u7167\u548C AOF \u65E5\u5FD7\u6587\u4EF6\uFF0C\u7279\u522B\u662F\u4E0D\u8981\u542F\u7528\u5185\u5B58\u5FEB\u7167\u505A\u6301\u4E45\u5316\u3002</li><li>\u5982\u679C\u6570\u636E\u6BD4\u8F83\u5173\u952E\uFF0C\u67D0\u4E2A Slave \u5F00\u542F AOF \u5907\u4EFD\u6570\u636E\uFF0C\u7B56\u7565\u4E3A\u6BCF\u79D2\u540C\u6B65\u4E00\u6B21\u3002</li><li>\u4E3A\u4E86\u4E3B\u4ECE\u590D\u5236\u7684\u901F\u5EA6\u548C\u8FDE\u63A5\u7684\u7A33\u5B9A\u6027\uFF0CSlave \u548C Master \u6700\u597D\u5728\u540C\u4E00\u4E2A\u5C40\u57DF\u7F51\u5185\u3002</li><li>\u5C3D\u91CF\u907F\u514D\u5728\u538B\u529B\u8F83\u5927\u7684\u4E3B\u5E93\u4E0A\u589E\u52A0\u4ECE\u5E93\u3002</li><li>Master \u8C03\u7528 BGREWRITEAOF \u91CD\u5199 AOF \u6587\u4EF6\uFF0CAOF \u5728\u91CD\u5199\u7684\u65F6\u5019\u4F1A\u5360\u5927\u91CF\u7684 CPU \u548C\u5185\u5B58\u8D44\u6E90\uFF0C\u5BFC\u81F4\u670D\u52A1 load \u8FC7\u9AD8\uFF0C\u51FA\u73B0\u77ED\u6682\u670D\u52A1\u6682\u505C\u73B0\u8C61\u3002</li><li>\u4E3A\u4E86 Master \u7684\u7A33\u5B9A\u6027\uFF0C\u4E3B\u4ECE\u590D\u5236\u4E0D\u8981\u7528\u56FE\u72B6\u7ED3\u6784\uFF0C\u7528\u5355\u5411\u94FE\u8868\u7ED3\u6784\u66F4\u7A33\u5B9A\uFF0C\u5373\u4E3B\u4ECE\u5173\u4E3A\uFF1AMaster&lt;\u2013Slave1&lt;\u2013Slave2&lt;\u2013Slave3\u2026\uFF0C\u8FD9\u6837\u7684\u7ED3\u6784\u4E5F\u65B9\u4FBF\u89E3\u51B3\u5355\u70B9\u6545\u969C\u95EE\u9898\uFF0C\u5B9E\u73B0 Slave \u5BF9 Master \u7684\u66FF\u6362\uFF0C\u4E5F\u5373\uFF0C\u5982\u679C Master \u6302\u4E86\uFF0C\u53EF\u4EE5\u7ACB\u9A6C\u542F\u7528 Slave1 \u505A Master\uFF0C\u5176\u4ED6\u4E0D\u53D8\u3002</li></ol><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><h2 id="redis\u5E94\u7528" tabindex="-1"><a class="header-anchor" href="#redis\u5E94\u7528" aria-hidden="true">#</a> Redis\u5E94\u7528</h2><h3 id="_40-\u4F7F\u7528redis-\u5982\u4F55\u5B9E\u73B0\u5F02\u6B65\u961F\u5217" tabindex="-1"><a class="header-anchor" href="#_40-\u4F7F\u7528redis-\u5982\u4F55\u5B9E\u73B0\u5F02\u6B65\u961F\u5217" aria-hidden="true">#</a> 40.\u4F7F\u7528Redis \u5982\u4F55\u5B9E\u73B0\u5F02\u6B65\u961F\u5217\uFF1F</h3><p>\u6211\u4EEC\u77E5\u9053redis\u652F\u6301\u5F88\u591A\u79CD\u7ED3\u6784\u7684\u6570\u636E\uFF0C\u90A3\u4E48\u5982\u4F55\u4F7F\u7528redis\u4F5C\u4E3A\u5F02\u6B65\u961F\u5217\u4F7F\u7528\u5462\uFF1F \u4E00\u822C\u6709\u4EE5\u4E0B\u51E0\u79CD\u65B9\u5F0F\uFF1A</p><ul><li><strong>\u4F7F\u7528list\u4F5C\u4E3A\u961F\u5217\uFF0Clpush\u751F\u4EA7\u6D88\u606F\uFF0Crpop\u6D88\u8D39\u6D88\u606F</strong></li></ul><p>\u8FD9\u79CD\u65B9\u5F0F\uFF0C\u6D88\u8D39\u8005\u6B7B\u5FAA\u73AFrpop\u4ECE\u961F\u5217\u4E2D\u6D88\u8D39\u6D88\u606F\u3002\u4F46\u662F\u8FD9\u6837\uFF0C\u5373\u4F7F\u961F\u5217\u91CC\u6CA1\u6709\u6D88\u606F\uFF0C\u4E5F\u4F1A\u8FDB\u884Crpop\uFF0C\u4F1A\u5BFC\u81F4Redis CPU\u7684\u6D88\u8017\u3002 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-e4b192a1-3ba7-4f4e-98de-e93f437cff7c.png" alt="list\u4F5C\u4E3A\u961F\u5217"> \u53EF\u4EE5\u901A\u8FC7\u8BA9\u6D88\u8D39\u8005\u4F11\u7720\u7684\u65B9\u5F0F\u7684\u65B9\u5F0F\u6765\u5904\u7406\uFF0C\u4F46\u662F\u8FD9\u6837\u53C8\u4F1A\u53C8\u6D88\u606F\u7684\u5EF6\u8FDF\u95EE\u9898\u3002</p><p>-<strong>\u4F7F\u7528list\u4F5C\u4E3A\u961F\u5217\uFF0Clpush\u751F\u4EA7\u6D88\u606F\uFF0Cbrpop\u6D88\u8D39\u6D88\u606F</strong></p><p>brpop\u662Frpop\u7684\u963B\u585E\u7248\u672C\uFF0Clist\u4E3A\u7A7A\u7684\u65F6\u5019\uFF0C\u5B83\u4F1A\u4E00\u76F4\u963B\u585E\uFF0C\u76F4\u5230list\u4E2D\u6709\u503C\u6216\u8005\u8D85\u65F6\u3002 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-e9581e51-ffc8-4326-9af4-07816743dc88.png" alt="list\u4F5C\u4E3A\u961F\u5217\uFF0Cbrpop"></p><p>\u8FD9\u79CD\u65B9\u5F0F\u53EA\u80FD\u5B9E\u73B0\u4E00\u5BF9\u4E00\u7684\u6D88\u606F\u961F\u5217\u3002</p><ul><li><strong>\u4F7F\u7528Redis\u7684pub/sub\u6765\u8FDB\u884C\u6D88\u606F\u7684\u53D1\u5E03/\u8BA2\u9605</strong></li></ul><p>\u53D1\u5E03/\u8BA2\u9605\u6A21\u5F0F\u53EF\u4EE51\uFF1AN\u7684\u6D88\u606F\u53D1\u5E03/\u8BA2\u9605\u3002\u53D1\u5E03\u8005\u5C06\u6D88\u606F\u53D1\u5E03\u5230\u6307\u5B9A\u7684\u9891\u9053\u9891\u9053\uFF08channel\uFF09\uFF0C\u8BA2\u9605\u76F8\u5E94\u9891\u9053\u7684\u5BA2\u6237\u7AEF\u90FD\u80FD\u6536\u5230\u6D88\u606F\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-bc6d05be-3701-4e23-b4ca-6330c949f020.png" alt="pub/sub"> \u4F46\u662F\u8FD9\u79CD\u65B9\u5F0F\u4E0D\u662F\u53EF\u9760\u7684\uFF0C\u5B83\u4E0D\u4FDD\u8BC1\u8BA2\u9605\u8005\u4E00\u5B9A\u80FD\u6536\u5230\u6D88\u606F\uFF0C\u4E5F\u4E0D\u8FDB\u884C\u6D88\u606F\u7684\u5B58\u50A8\u3002</p><p>\u6240\u4EE5\uFF0C\u4E00\u822C\u7684\u5F02\u6B65\u961F\u5217\u7684\u5B9E\u73B0\u8FD8\u662F\u4EA4\u7ED9\u4E13\u4E1A\u7684\u6D88\u606F\u961F\u5217\u3002</p><h3 id="_41-redis-\u5982\u4F55\u5B9E\u73B0\u5EF6\u65F6\u961F\u5217" tabindex="-1"><a class="header-anchor" href="#_41-redis-\u5982\u4F55\u5B9E\u73B0\u5EF6\u65F6\u961F\u5217" aria-hidden="true">#</a> 41.Redis \u5982\u4F55\u5B9E\u73B0\u5EF6\u65F6\u961F\u5217?</h3><ul><li><strong>\u4F7F\u7528zset\uFF0C\u5229\u7528\u6392\u5E8F\u5B9E\u73B0</strong></li></ul><p>\u53EF\u4EE5\u4F7F\u7528 zset\u8FD9\u4E2A\u7ED3\u6784\uFF0C\u7528\u8BBE\u7F6E\u597D\u7684\u65F6\u95F4\u6233\u4F5C\u4E3Ascore\u8FDB\u884C\u6392\u5E8F\uFF0C\u4F7F\u7528 zadd score1 value1 ....\u547D\u4EE4\u5C31\u53EF\u4EE5\u4E00\u76F4\u5F80\u5185\u5B58\u4E2D\u751F\u4EA7\u6D88\u606F\u3002\u518D\u5229\u7528 zrangebysocre \u67E5\u8BE2\u7B26\u5408\u6761\u4EF6\u7684\u6240\u6709\u5F85\u5904\u7406\u7684\u4EFB\u52A1\uFF0C\u901A\u8FC7\u5FAA\u73AF\u6267\u884C\u961F\u5217\u4EFB\u52A1\u5373\u53EF\u3002 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-54bbcc36-0b00-4142-a6eb-bf2ef48c2213.png" alt="zset\u5B9E\u73B0\u5EF6\u65F6\u961F\u5217"></p><h3 id="_42-redis-\u652F\u6301\u4E8B\u52A1\u5417" tabindex="-1"><a class="header-anchor" href="#_42-redis-\u652F\u6301\u4E8B\u52A1\u5417" aria-hidden="true">#</a> 42.Redis \u652F\u6301\u4E8B\u52A1\u5417\uFF1F</h3><p>Redis\u63D0\u4F9B\u4E86\u7B80\u5355\u7684\u4E8B\u52A1\uFF0C\u4F46\u5B83\u5BF9\u4E8B\u52A1ACID\u7684\u652F\u6301\u5E76\u4E0D\u5B8C\u5907\u3002</p><p>multi\u547D\u4EE4\u4EE3\u8868\u4E8B\u52A1\u5F00\u59CB\uFF0Cexec\u547D\u4EE4\u4EE3\u8868\u4E8B\u52A1\u7ED3\u675F\uFF0C\u5B83\u4EEC\u4E4B\u95F4\u7684\u547D\u4EE4\u662F\u539F\u5B50\u987A\u5E8F\u6267\u884C\u7684\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token number">127.0</span><span class="token number">.0</span><span class="token number">.1</span><span class="token operator">:</span><span class="token number">6379</span><span class="token operator">&gt;</span> multi 
 OK
 <span class="token number">127.0</span><span class="token number">.0</span><span class="token number">.1</span><span class="token operator">:</span><span class="token number">6379</span><span class="token operator">&gt;</span> sadd user<span class="token operator">:</span>a<span class="token operator">:</span>follow user<span class="token operator">:</span>b 
 QUEUED 
diff --git a/dist/assets/redis12question.html.bab032b9.js b/dist/assets/redis12question.html.f0270e84.js
similarity index 99%
rename from dist/assets/redis12question.html.bab032b9.js
rename to dist/assets/redis12question.html.f0270e84.js
index edc6b0cd..27e8ff91 100644
--- a/dist/assets/redis12question.html.bab032b9.js
+++ b/dist/assets/redis12question.html.f0270e84.js
@@ -1 +1 @@
-import{_ as e}from"./plugin-vue_export-helper.21dcd24c.js";import{o as t,c as s,e as p}from"./app.a0271b9c.js";const i={},r=p('<h1 id="redis-12\u9053\u7CBE\u9009\u9AD8\u9891\u9762\u8BD5\u9898" tabindex="-1"><a class="header-anchor" href="#redis-12\u9053\u7CBE\u9009\u9AD8\u9891\u9762\u8BD5\u9898" aria-hidden="true">#</a> Redis\uFF1A12\u9053\u7CBE\u9009\u9AD8\u9891\u9762\u8BD5\u9898</h1><p>\u5927\u5BB6\u597D\uFF0C\u6211\u662F\u4E8C\u54E5\u5440\u3002</p><p>Redis \u662F\u9762\u8BD5\u4E2D\u7ED5\u4E0D\u8FC7\u7684\u69DB\uFF0C\u53EA\u8981\u5728\u7B80\u5386\u4E2D\u5199\u4E86\u7528\u8FC7 Redis\uFF0C\u80AF\u5B9A\u9003\u4E0D\u8FC7\u3002\u4ECA\u5929\u6211\u4EEC\u5C31\u6765\u6A21\u62DF\u4E00\u4E0B\u9762\u8BD5\u5B98\u5728 Redis \u8FD9\u4E2A\u8BDD\u9898\u4E0A\u662F\u5982\u4F55\u4E00\u6B65\u4E00\u6B65\u6DF1\u5165\uFF0C\u5168\u9762\u8003\u5BDF\u5019\u9009\u4EBA\u5BF9\u4E8E Redis \u7684\u638C\u63E1\u60C5\u51B5\u3002</p><p>\u5C0F\u4E8C\uFF1A\u9762\u8BD5\u5B98\uFF0C\u4F60\u597D\u3002\u6211\u662F\u6765\u53C2\u52A0\u9762\u8BD5\u7684\u3002</p><p>\u9762\u8BD5\u5B98\uFF1A\u4F60\u597D\uFF0C\u5C0F\u4E8C\u3002\u6211\u770B\u4E86\u4F60\u7684\u7B80\u5386\uFF0C\u719F\u7EC3\u638C\u63E1 Redis\uFF0C\u90A3\u4E48\u6211\u5C31\u968F\u4FBF\u95EE\u4F60\u51E0\u4E2A Redis \u76F8\u5173\u7684\u95EE\u9898\u5427\u3002\u9996\u5148\u6211\u7684\u95EE\u9898\u662F\uFF0C<strong>Redis \u662F\u5355\u7EBF\u7A0B\u8FD8\u662F\u591A\u7EBF\u7A0B\u5462</strong>\uFF1F</p><p>\u5C0F\u4E8C\uFF1A</p><p>Redis \u4E0D\u540C\u7248\u672C\u4E4B\u95F4\u91C7\u7528\u7684\u7EBF\u7A0B\u6A21\u578B\u662F\u4E0D\u4E00\u6837\u7684\uFF0C\u5728 Redis4.0 \u7248\u672C\u4E4B\u524D\u4F7F\u7528\u7684\u662F\u5355\u7EBF\u7A0B\u6A21\u578B\uFF0C\u5728 4.0 \u7248\u672C\u4E4B\u540E\u589E\u52A0\u4E86\u591A\u7EBF\u7A0B\u7684\u652F\u6301\u3002</p><p>\u5728 4.0 \u4E4B\u524D\u867D\u7136\u6211\u4EEC\u8BF4 Redis \u662F\u5355\u7EBF\u7A0B\uFF0C\u4E5F\u53EA\u662F\u8BF4\u5B83\u7684\u7F51\u7EDC I/O \u7EBF\u7A0B\u4EE5\u53CA Set \u548C Get \u64CD\u4F5C\u662F\u7531\u4E00\u4E2A\u7EBF\u7A0B\u5B8C\u6210\u7684\u3002\u4F46\u662F Redis \u7684\u6301\u4E45\u5316\u3001\u96C6\u7FA4\u540C\u6B65\u8FD8\u662F\u4F7F\u7528\u5176\u4ED6\u7EBF\u7A0B\u6765\u5B8C\u6210\u3002</p><p>4.0 \u4E4B\u540E\u6DFB\u52A0\u4E86\u591A\u7EBF\u7A0B\u7684\u652F\u6301\uFF0C\u4E3B\u8981\u662F\u4F53\u73B0\u5728\u5927\u6570\u636E\u7684\u5F02\u6B65\u5220\u9664\u529F\u80FD\u4E0A\uFF0C\u4F8B\u5982 unlink key\u3001flushdb async\u3001flushall async \u7B49</p><p>\u9762\u8BD5\u5B98\uFF1A\u56DE\u7B54\u7684\u5F88\u597D\uFF0C<strong>\u90A3\u4E3A\u4EC0\u4E48 Redis \u5728 4.0 \u4E4B\u524D\u4F1A\u9009\u62E9\u4F7F\u7528\u5355\u7EBF\u7A0B\uFF1F\u800C\u4E14\u4F7F\u7528\u5355\u7EBF\u7A0B\u8FD8\u90A3\u4E48\u5FEB</strong>\uFF1F</p><p>\u5C0F\u4E8C\uFF1A</p><p>\u9009\u62E9\u5355\u7EBF\u7A0B\u4E2A\u4EBA\u89C9\u5F97\u4E3B\u8981\u662F\u4F7F\u7528\u7B80\u5355\uFF0C\u4E0D\u5B58\u5728\u9501\u7ADE\u4E89\uFF0C\u53EF\u4EE5\u5728\u65E0\u9501\u7684\u60C5\u51B5\u4E0B\u5B8C\u6210\u6240\u6709\u64CD\u4F5C\uFF0C\u4E0D\u5B58\u5728\u6B7B\u9501\u548C\u7EBF\u7A0B\u5207\u6362\u5E26\u6765\u7684\u6027\u80FD\u548C\u65F6\u95F4\u4E0A\u7684\u5F00\u9500\uFF0C\u4F46\u540C\u65F6\u5355\u7EBF\u7A0B\u4E5F\u4E0D\u80FD\u5B8C\u5168\u53D1\u6325\u51FA\u591A\u6838 CPU \u7684\u6027\u80FD\u3002</p><p>\u81F3\u4E8E\u4E3A\u4EC0\u4E48\u5355\u7EBF\u7A0B\u90A3\u4E48\u5FEB\u6211\u89C9\u5F97\u4E3B\u8981\u6709\u4EE5\u4E0B\u51E0\u4E2A\u539F\u56E0\uFF1A</p><ul><li>Redis \u7684\u5927\u90E8\u5206\u64CD\u4F5C\u90FD\u5728\u5185\u5B58\u4E2D\u5B8C\u6210\uFF0C\u5185\u5B58\u4E2D\u7684\u6267\u884C\u6548\u7387\u672C\u8EAB\u5C31\u5F88\u5FEB\uFF0C\u5E76\u4E14\u91C7\u7528\u4E86\u9AD8\u6548\u7684\u6570\u636E\u7ED3\u6784\uFF0C\u6BD4\u5982\u54C8\u5E0C\u8868\u548C\u8DF3\u8868\u3002</li><li>\u4F7F\u7528\u5355\u7EBF\u7A0B\u907F\u514D\u4E86\u591A\u7EBF\u7A0B\u7684\u7ADE\u4E89\uFF0C\u7701\u53BB\u4E86\u591A\u7EBF\u7A0B\u5207\u6362\u5E26\u6765\u7684\u65F6\u95F4\u548C\u6027\u80FD\u5F00\u9500\uFF0C\u5E76\u4E14\u4E0D\u4F1A\u51FA\u73B0\u6B7B\u9501\u3002</li><li>\u91C7\u7528 I/O \u591A\u8DEF\u590D\u7528\u673A\u5236\u5904\u7406\u5927\u91CF\u5BA2\u6237\u7AEF\u7684 Socket \u8BF7\u6C42\uFF0C\u56E0\u4E3A\u8FD9\u662F\u57FA\u4E8E\u975E\u963B\u585E\u7684 I/O \u6A21\u578B\uFF0C\u8FD9\u5C31\u8BA9 Redis \u53EF\u4EE5\u9AD8\u6548\u5730\u8FDB\u884C\u7F51\u7EDC\u901A\u4FE1\uFF0CI/O \u7684\u8BFB\u5199\u6D41\u7A0B\u4E5F\u4E0D\u518D\u963B\u585E\u3002</li></ul><p>\u9762\u8BD5\u5B98\uFF1A\u4E0D\u9519\uFF0C\u90A3 <strong>Redis \u662F\u5982\u4F55\u5B9E\u73B0\u6570\u636E\u4E0D\u4E22\u5931\u7684\u5462</strong>\uFF1F</p><p>\u5C0F\u4E8C\uFF1A</p><p>Redis \u6570\u636E\u662F\u5B58\u50A8\u5728\u5185\u5B58\u4E2D\u7684\uFF0C\u4E3A\u4E86\u4FDD\u8BC1 Redis \u6570\u636E\u4E0D\u4E22\u5931\uFF0C\u90A3\u5C31\u8981\u628A\u6570\u636E\u4ECE\u5185\u5B58\u5B58\u50A8\u5230\u78C1\u76D8\u4E0A\uFF0C\u4EE5\u4FBF\u5728\u670D\u52A1\u5668\u91CD\u542F\u540E\u8FD8\u80FD\u591F\u4ECE\u78C1\u76D8\u4E2D\u6062\u590D\u539F\u6709\u6570\u636E\uFF0C\u8FD9\u5C31\u662F Redis \u7684\u6570\u636E\u6301\u4E45\u5316\u3002Redis \u6570\u636E\u6301\u4E45\u5316\u6709\u4E09\u79CD\u65B9\u5F0F\u3002</p><p><strong>1\uFF09AOF \u65E5\u5FD7\uFF08Append Only File\uFF0C\u6587\u4EF6\u8FFD\u52A0\u65B9\u5F0F\uFF09</strong>\uFF1A\u8BB0\u5F55\u6240\u6709\u7684\u64CD\u4F5C\u547D\u4EE4\uFF0C\u5E76\u4EE5\u6587\u672C\u7684\u5F62\u5F0F\u8FFD\u52A0\u5230\u6587\u4EF6\u4E2D\u3002</p><p><strong>2\uFF09RDB \u5FEB\u7167\uFF08Redis DataBase\uFF09</strong>\uFF1A\u5C06\u67D0\u4E00\u4E2A\u65F6\u523B\u7684\u5185\u5B58\u6570\u636E\uFF0C\u4EE5\u4E8C\u8FDB\u5236\u7684\u65B9\u5F0F\u5199\u5165\u78C1\u76D8\u3002</p><p><strong>3\uFF09\u6DF7\u5408\u6301\u4E45\u5316\u65B9\u5F0F</strong>\uFF1ARedis 4.0 \u65B0\u589E\u4E86\u6DF7\u5408\u6301\u4E45\u5316\u7684\u65B9\u5F0F\uFF0C\u96C6\u6210\u4E86 RDB \u548C AOF \u7684\u4F18\u70B9\u3002</p><p>\u9762\u8BD5\u5B98\uFF1A\u90A3\u4F60\u5206\u522B\u8BF4\u8BF4 <strong>AOF \u548C RDB \u7684\u5B9E\u73B0\u539F\u7406</strong>\u5427\u3002</p><p>\u5C0F\u4E8C\uFF1A</p><p>AOF \u91C7\u7528\u7684\u662F\u5199\u540E\u65E5\u5FD7\u7684\u65B9\u5F0F\uFF0CRedis \u5148\u6267\u884C\u547D\u4EE4\u628A\u6570\u636E\u5199\u5165\u5185\u5B58\uFF0C\u7136\u540E\u518D\u8BB0\u5F55\u65E5\u5FD7\u5230\u6587\u4EF6\u4E2D\u3002AOF \u65E5\u5FD7\u8BB0\u5F55\u7684\u662F\u64CD\u4F5C\u547D\u4EE4\uFF0C\u4E0D\u662F\u5B9E\u9645\u7684\u6570\u636E\uFF0C\u5982\u679C\u91C7\u7528 AOF \u65B9\u6CD5\u505A\u6545\u969C\u6062\u590D\u65F6\u9700\u8981\u5C06\u5168\u91CF\u65E5\u5FD7\u90FD\u6267\u884C\u4E00\u904D\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mianjing/redis12question-1.png" alt=""></p><p>RDB \u91C7\u7528\u7684\u662F\u5185\u5B58\u5FEB\u7167\u7684\u65B9\u5F0F\uFF0C\u5B83\u8BB0\u5F55\u7684\u662F\u67D0\u4E00\u65F6\u523B\u7684\u6570\u636E\uFF0C\u800C\u4E0D\u662F\u64CD\u4F5C\uFF0C\u6240\u4EE5\u91C7\u7528 RDB \u65B9\u6CD5\u505A\u6545\u969C\u6062\u590D\u65F6\u53EA\u9700\u8981\u76F4\u63A5\u628A RDB \u6587\u4EF6\u8BFB\u5165\u5185\u5B58\u5373\u53EF\uFF0C\u5B9E\u73B0\u5FEB\u901F\u6062\u590D\u3002</p><p>\u9762\u8BD5\u5B98\uFF1A\u4F60\u521A\u63D0\u5230\u4E86 AOF \u91C7\u7528\u7684\u662F \u201C\u5199\u540E\u65E5\u5FD7\u201D \u7684\u65B9\u5F0F\uFF0C\u6211\u4EEC\u5E73\u65F6\u7528\u7684 MySQL \u5219\u91C7\u7528\u7684\u662F \u201C\u5199\u524D\u65E5\u5FD7\u201D\uFF0C\u90A3 <strong>Redis \u4E3A\u4EC0\u4E48\u8981\u5148\u6267\u884C\u547D\u4EE4\uFF0C\u518D\u628A\u6570\u636E\u5199\u5165\u65E5\u5FD7\u5462</strong>\uFF1F</p><p>\u5C0F\u4E8C\uFF1A\u8FD9\u4E2A\u4E3B\u8981\u662F\u7531\u4E8E Redis \u5728\u5199\u5165\u65E5\u5FD7\u4E4B\u524D\uFF0C\u4E0D\u5BF9\u547D\u4EE4\u8FDB\u884C\u8BED\u6CD5\u68C0\u67E5\uFF0C\u6240\u4EE5\u53EA\u8BB0\u5F55\u6267\u884C\u6210\u529F\u7684\u547D\u4EE4\uFF0C\u907F\u514D\u51FA\u73B0\u8BB0\u5F55\u9519\u8BEF\u547D\u4EE4\u7684\u60C5\u51B5\uFF0C\u800C\u4E14\u5728\u547D\u4EE4\u6267\u884C\u540E\u518D\u5199\u65E5\u5FD7\u4E0D\u4F1A\u963B\u585E\u5F53\u524D\u7684\u5199\u64CD\u4F5C\u3002</p><p>\u9762\u8BD5\u5B98\uFF1A<strong>\u90A3\u540E\u5199\u65E5\u5FD7\u53C8\u6709\u4EC0\u4E48\u98CE\u9669\u5462</strong>\uFF1F</p><p>\u5C0F\u4E8C\uFF1A\u6211... \u8FD9\u4E2A\u6211\u4E0D\u4F1A\u3002</p><p>\u9762\u8BD5\u5B98\uFF1A</p><p>\u597D\u5427\uFF0C\u540E\u5199\u65E5\u5FD7\u4E3B\u8981\u6709\u4E24\u4E2A\u98CE\u9669\u53EF\u80FD\u4F1A\u53D1\u751F\uFF1A</p><ul><li><strong>\u6570\u636E\u53EF\u80FD\u4F1A\u4E22\u5931</strong>\uFF1A\u5982\u679C Redis \u521A\u6267\u884C\u5B8C\u547D\u4EE4\uFF0C\u6B64\u65F6\u53D1\u751F\u6545\u969C\u5B95\u673A\uFF0C\u4F1A\u5BFC\u81F4\u8FD9\u6761\u547D\u4EE4\u5B58\u5728\u4E22\u5931\u7684\u98CE\u9669\u3002</li><li><strong>\u53EF\u80FD\u963B\u585E\u5176\u4ED6\u64CD\u4F5C</strong>\uFF1AAOF \u65E5\u5FD7\u5176\u5B9E\u4E5F\u662F\u5728\u4E3B\u7EBF\u7A0B\u4E2D\u6267\u884C\uFF0C\u6240\u4EE5\u5F53 Redis \u628A\u65E5\u5FD7\u6587\u4EF6\u5199\u5165\u78C1\u76D8\u7684\u65F6\u5019\uFF0C\u8FD8\u662F\u4F1A\u963B\u585E\u540E\u7EED\u7684\u64CD\u4F5C\u65E0\u6CD5\u6267\u884C\u3002</li></ul><p>\u6211\u8FD8\u6709\u4E2A\u95EE\u9898\u662F <strong>RDB \u505A\u5FEB\u7167\u65F6\u4F1A\u963B\u585E\u7EBF\u7A0B\u5417</strong>\uFF1F</p><p>\u5C0F\u4E8C\uFF1ARedis \u63D0\u4F9B\u4E86\u4E24\u4E2A\u547D\u4EE4\u6765\u751F\u6210 RDB \u5FEB\u7167\u6587\u4EF6\uFF0C\u5206\u522B\u662F save \u548C bgsave\u3002save \u547D\u4EE4\u5728\u4E3B\u7EBF\u7A0B\u4E2D\u6267\u884C\uFF0C\u4F1A\u5BFC\u81F4\u963B\u585E\u3002\u800C bgsave \u547D\u4EE4\u5219\u4F1A\u521B\u5EFA\u4E00\u4E2A\u5B50\u8FDB\u7A0B\uFF0C\u7528\u4E8E\u5199\u5165 RDB \u6587\u4EF6\u7684\u64CD\u4F5C\uFF0C\u907F\u514D\u4E86\u5BF9\u4E3B\u7EBF\u7A0B\u7684\u963B\u585E\uFF0C\u8FD9\u4E5F\u662F Redis RDB \u7684\u9ED8\u8BA4\u914D\u7F6E\u3002</p><p>\u9762\u8BD5\u5B98\uFF1A<strong>RDB \u505A\u5FEB\u7167\u7684\u65F6\u5019\u6570\u636E\u80FD\u4FEE\u6539\u5417</strong>\uFF1F</p><p>\u5C0F\u4E8C\uFF1Asave \u662F\u540C\u6B65\u7684\u4F1A\u963B\u585E\u5BA2\u6237\u7AEF\u547D\u4EE4\uFF0Cbgsave \u7684\u65F6\u5019\u662F\u53EF\u4EE5\u4FEE\u6539\u7684\u3002</p><p>\u9762\u8BD5\u5B98\uFF1A\u90A3 Redis \u662F<strong>\u600E\u4E48\u89E3\u51B3\u5728 bgsave \u505A\u5FEB\u7167\u7684\u65F6\u5019\u5141\u8BB8\u6570\u636E\u4FEE\u6539\u5462</strong>\uFF1F</p><p>\u5C0F\u4E8C\uFF1A\u989D\uFF0C\u8FD9\u4E2A\u6211\u4E0D\u592A\u6E05\u695A...</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mianjing/redis12question-2.png" alt=""></p><p>\u9762\u8BD5\u5B98\uFF1A</p><p>\u8FD9\u91CC\u4E3B\u8981\u662F\u5229\u7528 bgsave \u7684\u5B50\u7EBF\u7A0B\u5B9E\u73B0\u7684\uFF0C\u5177\u4F53\u64CD\u4F5C\u5982\u4E0B\uFF1A</p><ul><li>\u5982\u679C\u4E3B\u7EBF\u7A0B\u6267\u884C\u8BFB\u64CD\u4F5C\uFF0C\u5219\u4E3B\u7EBF\u7A0B\u548C bgsave \u5B50\u8FDB\u7A0B\u4E92\u76F8\u4E0D\u5F71\u54CD\uFF1B</li><li>\u5982\u679C\u4E3B\u7EBF\u7A0B\u6267\u884C\u5199\u64CD\u4F5C\uFF0C\u5219\u88AB\u4FEE\u6539\u7684\u6570\u636E\u4F1A\u590D\u5236\u4E00\u4EFD\u526F\u672C\uFF0C\u7136\u540E bgsave \u5B50\u8FDB\u7A0B\u4F1A\u628A\u8BE5\u526F\u672C\u6570\u636E\u5199\u5165 RDB \u6587\u4EF6\uFF0C\u5728\u8FD9\u4E2A\u8FC7\u7A0B\u4E2D\uFF0C\u4E3B\u7EBF\u7A0B\u4ECD\u7136\u53EF\u4EE5\u76F4\u63A5\u4FEE\u6539\u539F\u6765\u7684\u6570\u636E\u3002</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mianjing/redis12question-3.png" alt=""></p><p>\u8981\u6CE8\u610F\uFF0CRedis \u5BF9 RDB \u7684\u6267\u884C\u9891\u7387\u975E\u5E38\u91CD\u8981\uFF0C\u56E0\u4E3A\u8FD9\u4F1A\u5F71\u54CD\u5FEB\u7167\u6570\u636E\u7684\u5B8C\u6574\u6027\u4EE5\u53CA Redis \u7684\u7A33\u5B9A\u6027\uFF0C\u6240\u4EE5\u5728 Redis 4.0 \u540E\uFF0C\u589E\u52A0\u4E86 AOF \u548C RDB \u6DF7\u5408\u7684\u6570\u636E\u6301\u4E45\u5316\u673A\u5236\uFF1A \u628A\u6570\u636E\u4EE5 RDB \u7684\u65B9\u5F0F\u5199\u5165\u6587\u4EF6\uFF0C\u518D\u5C06\u540E\u7EED\u7684\u64CD\u4F5C\u547D\u4EE4\u4EE5 AOF \u7684\u683C\u5F0F\u5B58\u5165\u6587\u4EF6\uFF0C\u65E2\u4FDD\u8BC1\u4E86 Redis \u91CD\u542F\u901F\u5EA6\uFF0C\u53C8\u964D\u4F4E\u6570\u636E\u4E22\u5931\u98CE\u9669\u3002</p><p>\u5C0F\u4E8C\uFF1A\u5B66\u5230\u4E86\u5B66\u5230\u4E86\u3002</p><p>\u9762\u8BD5\u5B98\uFF1A\u90A3\u4F60\u518D\u8DDF\u6211\u8BF4\u8BF4 <strong>Redis \u5982\u4F55\u5B9E\u73B0\u9AD8\u53EF\u7528</strong>\u5427\uFF1F</p><p>\u5C0F\u4E8C\uFF1ARedis \u5B9E\u73B0\u9AD8\u53EF\u7528\u4E3B\u8981\u6709\u4E09\u79CD\u65B9\u5F0F\uFF1A\u4E3B\u4ECE\u590D\u5236\u3001\u54E8\u5175\u6A21\u5F0F\uFF0C\u4EE5\u53CA Redis \u96C6\u7FA4\u3002</p><p><strong>1\uFF09\u4E3B\u4ECE\u590D\u5236</strong></p><p>\u5C06\u4ECE\u524D\u7684\u4E00\u53F0 Redis \u670D\u52A1\u5668\uFF0C\u540C\u6B65\u6570\u636E\u5230\u591A\u53F0\u4ECE Redis \u670D\u52A1\u5668\u4E0A\uFF0C\u5373\u4E00\u4E3B\u591A\u4ECE\u7684\u6A21\u5F0F\uFF0C\u8FD9\u4E2A\u8DDF MySQL \u4E3B\u4ECE\u590D\u5236\u7684\u539F\u7406\u4E00\u6837\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mianjing/redis12question-4.png" alt=""></p><p><strong>2\uFF09\u54E8\u5175\u6A21\u5F0F</strong></p><p>\u4F7F\u7528 Redis \u4E3B\u4ECE\u670D\u52A1\u7684\u65F6\u5019\uFF0C\u4F1A\u6709\u4E00\u4E2A\u95EE\u9898\uFF0C\u5C31\u662F\u5F53 Redis \u7684\u4E3B\u4ECE\u670D\u52A1\u5668\u51FA\u73B0\u6545\u969C\u5B95\u673A\u65F6\uFF0C\u9700\u8981\u624B\u52A8\u8FDB\u884C\u6062\u590D\uFF0C\u4E3A\u4E86\u89E3\u51B3\u8FD9\u4E2A\u95EE\u9898\uFF0CRedis \u589E\u52A0\u4E86\u54E8\u5175\u6A21\u5F0F\uFF08\u56E0\u4E3A\u54E8\u5175\u6A21\u5F0F\u505A\u5230\u4E86\u53EF\u4EE5\u76D1\u63A7\u4E3B\u4ECE\u670D\u52A1\u5668\uFF0C\u5E76\u4E14\u63D0\u4F9B\u81EA\u52A8\u5BB9\u707E\u6062\u590D\u7684\u529F\u80FD\uFF09\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mianjing/redis12question-5.png" alt=""></p><p><strong>3\uFF09Redis Cluster\uFF08\u96C6\u7FA4\uFF09</strong></p><p>Redis Cluster \u662F\u4E00\u79CD\u5206\u5E03\u5F0F\u53BB\u4E2D\u5FC3\u5316\u7684\u8FD0\u884C\u6A21\u5F0F\uFF0C\u662F\u5728 Redis 3.0 \u7248\u672C\u4E2D\u63A8\u51FA\u7684 Redis \u96C6\u7FA4\u65B9\u6848\uFF0C\u5B83\u5C06\u6570\u636E\u5206\u5E03\u5728\u4E0D\u540C\u7684\u670D\u52A1\u5668\u4E0A\uFF0C\u4EE5\u6B64\u6765\u964D\u4F4E\u7CFB\u7EDF\u5BF9\u5355\u4E3B\u8282\u70B9\u7684\u4F9D\u8D56\uFF0C\u4ECE\u800C\u63D0\u9AD8 Redis \u670D\u52A1\u7684\u8BFB\u5199\u6027\u80FD\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mianjing/redis12question-6.png" alt=""></p><p>\u9762\u8BD5\u5B98\uFF1A\u4F7F\u7528\u54E8\u5175\u6A21\u5F0F\u5728\u6570\u636E\u4E0A\u6709\u526F\u672C\u6570\u636E\u505A\u4FDD\u8BC1\uFF0C\u5728\u53EF\u7528\u6027\u4E0A\u53C8\u6709\u54E8\u5175\u76D1\u63A7\uFF0C\u4E00\u65E6 master \u5B95\u673A\u4F1A\u9009\u4E3E salve \u8282\u70B9\u4E3A master \u8282\u70B9\uFF0C\u8FD9\u79CD\u5DF2\u7ECF\u6EE1\u8DB3\u4E86\u6211\u4EEC\u7684\u751F\u4EA7\u73AF\u5883\u9700\u8981\uFF0C<strong>\u90A3\u4E3A\u4EC0\u4E48\u8FD8\u9700\u8981\u4F7F\u7528\u96C6\u7FA4\u6A21\u5F0F\u5462</strong>\uFF1F</p><p>\u5C0F\u4E8C\uFF1A\u54E8\u5175\u6A21\u5F0F\u5F52\u6839\u8282\u70B9\u8FD8\u662F\u4E3B\u4ECE\u6A21\u5F0F\uFF0C\u5728\u4E3B\u4ECE\u6A21\u5F0F\u4E0B\u6211\u4EEC\u53EF\u4EE5\u901A\u8FC7\u589E\u52A0 salve \u8282\u70B9\u6765\u6269\u5C55\u8BFB\u5E76\u53D1\u80FD\u529B\uFF0C\u4F46\u662F\u6CA1\u529E\u6CD5\u6269\u5C55\u5199\u80FD\u529B\u548C\u5B58\u50A8\u80FD\u529B\uFF0C\u5B58\u50A8\u80FD\u529B\u53EA\u80FD\u662F master \u8282\u70B9\u80FD\u591F\u627F\u8F7D\u7684\u4E0A\u9650\u3002\u6240\u4EE5\u4E3A\u4E86\u6269\u5C55\u5199\u80FD\u529B\u548C\u5B58\u50A8\u80FD\u529B\uFF0C\u6211\u4EEC\u5C31\u9700\u8981\u5F15\u5165\u96C6\u7FA4\u6A21\u5F0F\u3002</p><p>\u9762\u8BD5\u5B98\uFF1A\u96C6\u7FA4\u4E2D\u90A3\u4E48\u591A Master \u8282\u70B9\uFF0C<strong>Redis Cluster \u5728\u5B58\u50A8\u7684\u65F6\u5019\u5982\u4F55\u786E\u5B9A\u9009\u62E9\u54EA\u4E2A\u8282\u70B9\u5462</strong>\uFF1F</p><p>\u5C0F\u4E8C\uFF1A\u8FD9\u5E94\u8BE5\u662F\u4F7F\u7528\u4E86\u67D0\u79CD hash \u7B97\u6CD5\uFF0C\u4F46\u662F\u6211\u4E0D\u592A\u6E05\u695A\u3002\u3002\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mianjing/redis12question-7.png" alt=""></p><p>\u9762\u8BD5\u5B98\uFF1A\u90A3\u597D\uFF0C\u4ECA\u5929\u7684\u9762\u8BD5\u5C31\u5230\u8FD9\u91CC\u5427\uFF0C\u4F60\u5148\u56DE\u53BB\u7B49\u6211\u4EEC\u7684\u9762\u8BD5\u901A\u77E5\u3002</p><p>\u5C0F\u4E8C\uFF1A\u597D\u7684\uFF0C\u8C22\u8C22\u9762\u8BD5\u5B98\uFF0C\u4F60\u80FD\u544A\u8BC9\u6211 Redis Cluster \u600E\u4E48\u5B9E\u73B0\u8282\u70B9\u9009\u62E9\u7684\u5417\uFF1F</p><p>\u9762\u8BD5\u5B98\uFF1A</p><p>Redis Cluster \u91C7\u7528\u7684\u662F\u7C7B\u4E00\u81F4\u6027\u54C8\u5E0C\u7B97\u6CD5\u5B9E\u73B0\u8282\u70B9\u9009\u62E9\u7684\uFF0C\u81F3\u4E8E\u4EC0\u4E48\u662F\u4E00\u81F4\u6027\u54C8\u5E0C\u7B97\u6CD5\u4F60\u81EA\u5DF1\u56DE\u53BB\u770B\u770B\u3002</p><p>Redis Cluster \u5C06\u81EA\u5DF1\u5206\u6210\u4E86 16384 \u4E2A Slot\uFF08\u69FD\u4F4D\uFF09\uFF0C\u54C8\u5E0C\u69FD\u7C7B\u4F3C\u4E8E\u6570\u636E\u5206\u533A\uFF0C\u6BCF\u4E2A\u952E\u503C\u5BF9\u90FD\u4F1A\u6839\u636E\u5B83\u7684 key\uFF0C\u88AB\u6620\u5C04\u5230\u4E00\u4E2A\u54C8\u5E0C\u69FD\u4E2D\uFF0C\u5177\u4F53\u6267\u884C\u8FC7\u7A0B\u5206\u4E3A\u4E24\u5927\u6B65\u3002</p><p>1\uFF09\u6839\u636E\u952E\u503C\u5BF9\u7684 key\uFF0C\u6309\u7167 CRC16 \u7B97\u6CD5\u8BA1\u7B97\u4E00\u4E2A 16 bit \u7684\u503C\u3002</p><p>2\uFF09\u518D\u7528 16bit \u503C\u5BF9 16384 \u53D6\u6A21\uFF0C\u5F97\u5230 0~16383 \u8303\u56F4\u5185\u7684\u6A21\u6570\uFF0C\u6BCF\u4E2A\u6A21\u6570\u4EE3\u8868\u4E00\u4E2A\u76F8\u5E94\u7F16\u53F7\u7684\u54C8\u5E0C\u69FD\u3002</p><p>\u6BCF\u4E2A Redis \u8282\u70B9\u8D1F\u8D23\u5904\u7406\u4E00\u90E8\u5206\u69FD\u4F4D\uFF0C\u5047\u5982\u4F60\u6709\u4E09\u4E2A master \u8282\u70B9 ABC\uFF0C\u6BCF\u4E2A\u8282\u70B9\u8D1F\u8D23\u7684\u69FD\u4F4D\u5982\u4E0B\uFF1A</p><table><thead><tr><th>\u8282\u70B9</th><th>\u5904\u7406\u69FD\u4F4D</th></tr></thead><tbody><tr><td>A</td><td>0-5000</td></tr><tr><td>B</td><td>5001 - 10000</td></tr><tr><td>C</td><td>10001 - 16383</td></tr></tbody></table><p>\u8FD9\u6837\u5C31\u5B9E\u73B0\u4E86 cluster \u8282\u70B9\u7684\u9009\u62E9\u3002</p><hr><p>\u6587\u7AE0\u6765\u6E90\u4E8EJAVA\u65E5\u77E5\u5F55 \uFF0C\u4F5C\u8005\u98D8\u6E3AJam \u8F6C\u8F7D\u94FE\u63A5\uFF1Ahttps://mp.weixin.qq.com/s/GFUHslsSm96fJbhsCkFe_w</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p>',74),a=[r];function n(d,o){return t(),s("div",null,a)}var l=e(i,[["render",n],["__file","redis12question.html.vue"]]);export{l as default};
+import{_ as e}from"./plugin-vue_export-helper.21dcd24c.js";import{o as t,c as s,e as p}from"./app.615e41d8.js";const i={},r=p('<h1 id="redis-12\u9053\u7CBE\u9009\u9AD8\u9891\u9762\u8BD5\u9898" tabindex="-1"><a class="header-anchor" href="#redis-12\u9053\u7CBE\u9009\u9AD8\u9891\u9762\u8BD5\u9898" aria-hidden="true">#</a> Redis\uFF1A12\u9053\u7CBE\u9009\u9AD8\u9891\u9762\u8BD5\u9898</h1><p>\u5927\u5BB6\u597D\uFF0C\u6211\u662F\u4E8C\u54E5\u5440\u3002</p><p>Redis \u662F\u9762\u8BD5\u4E2D\u7ED5\u4E0D\u8FC7\u7684\u69DB\uFF0C\u53EA\u8981\u5728\u7B80\u5386\u4E2D\u5199\u4E86\u7528\u8FC7 Redis\uFF0C\u80AF\u5B9A\u9003\u4E0D\u8FC7\u3002\u4ECA\u5929\u6211\u4EEC\u5C31\u6765\u6A21\u62DF\u4E00\u4E0B\u9762\u8BD5\u5B98\u5728 Redis \u8FD9\u4E2A\u8BDD\u9898\u4E0A\u662F\u5982\u4F55\u4E00\u6B65\u4E00\u6B65\u6DF1\u5165\uFF0C\u5168\u9762\u8003\u5BDF\u5019\u9009\u4EBA\u5BF9\u4E8E Redis \u7684\u638C\u63E1\u60C5\u51B5\u3002</p><p>\u5C0F\u4E8C\uFF1A\u9762\u8BD5\u5B98\uFF0C\u4F60\u597D\u3002\u6211\u662F\u6765\u53C2\u52A0\u9762\u8BD5\u7684\u3002</p><p>\u9762\u8BD5\u5B98\uFF1A\u4F60\u597D\uFF0C\u5C0F\u4E8C\u3002\u6211\u770B\u4E86\u4F60\u7684\u7B80\u5386\uFF0C\u719F\u7EC3\u638C\u63E1 Redis\uFF0C\u90A3\u4E48\u6211\u5C31\u968F\u4FBF\u95EE\u4F60\u51E0\u4E2A Redis \u76F8\u5173\u7684\u95EE\u9898\u5427\u3002\u9996\u5148\u6211\u7684\u95EE\u9898\u662F\uFF0C<strong>Redis \u662F\u5355\u7EBF\u7A0B\u8FD8\u662F\u591A\u7EBF\u7A0B\u5462</strong>\uFF1F</p><p>\u5C0F\u4E8C\uFF1A</p><p>Redis \u4E0D\u540C\u7248\u672C\u4E4B\u95F4\u91C7\u7528\u7684\u7EBF\u7A0B\u6A21\u578B\u662F\u4E0D\u4E00\u6837\u7684\uFF0C\u5728 Redis4.0 \u7248\u672C\u4E4B\u524D\u4F7F\u7528\u7684\u662F\u5355\u7EBF\u7A0B\u6A21\u578B\uFF0C\u5728 4.0 \u7248\u672C\u4E4B\u540E\u589E\u52A0\u4E86\u591A\u7EBF\u7A0B\u7684\u652F\u6301\u3002</p><p>\u5728 4.0 \u4E4B\u524D\u867D\u7136\u6211\u4EEC\u8BF4 Redis \u662F\u5355\u7EBF\u7A0B\uFF0C\u4E5F\u53EA\u662F\u8BF4\u5B83\u7684\u7F51\u7EDC I/O \u7EBF\u7A0B\u4EE5\u53CA Set \u548C Get \u64CD\u4F5C\u662F\u7531\u4E00\u4E2A\u7EBF\u7A0B\u5B8C\u6210\u7684\u3002\u4F46\u662F Redis \u7684\u6301\u4E45\u5316\u3001\u96C6\u7FA4\u540C\u6B65\u8FD8\u662F\u4F7F\u7528\u5176\u4ED6\u7EBF\u7A0B\u6765\u5B8C\u6210\u3002</p><p>4.0 \u4E4B\u540E\u6DFB\u52A0\u4E86\u591A\u7EBF\u7A0B\u7684\u652F\u6301\uFF0C\u4E3B\u8981\u662F\u4F53\u73B0\u5728\u5927\u6570\u636E\u7684\u5F02\u6B65\u5220\u9664\u529F\u80FD\u4E0A\uFF0C\u4F8B\u5982 unlink key\u3001flushdb async\u3001flushall async \u7B49</p><p>\u9762\u8BD5\u5B98\uFF1A\u56DE\u7B54\u7684\u5F88\u597D\uFF0C<strong>\u90A3\u4E3A\u4EC0\u4E48 Redis \u5728 4.0 \u4E4B\u524D\u4F1A\u9009\u62E9\u4F7F\u7528\u5355\u7EBF\u7A0B\uFF1F\u800C\u4E14\u4F7F\u7528\u5355\u7EBF\u7A0B\u8FD8\u90A3\u4E48\u5FEB</strong>\uFF1F</p><p>\u5C0F\u4E8C\uFF1A</p><p>\u9009\u62E9\u5355\u7EBF\u7A0B\u4E2A\u4EBA\u89C9\u5F97\u4E3B\u8981\u662F\u4F7F\u7528\u7B80\u5355\uFF0C\u4E0D\u5B58\u5728\u9501\u7ADE\u4E89\uFF0C\u53EF\u4EE5\u5728\u65E0\u9501\u7684\u60C5\u51B5\u4E0B\u5B8C\u6210\u6240\u6709\u64CD\u4F5C\uFF0C\u4E0D\u5B58\u5728\u6B7B\u9501\u548C\u7EBF\u7A0B\u5207\u6362\u5E26\u6765\u7684\u6027\u80FD\u548C\u65F6\u95F4\u4E0A\u7684\u5F00\u9500\uFF0C\u4F46\u540C\u65F6\u5355\u7EBF\u7A0B\u4E5F\u4E0D\u80FD\u5B8C\u5168\u53D1\u6325\u51FA\u591A\u6838 CPU \u7684\u6027\u80FD\u3002</p><p>\u81F3\u4E8E\u4E3A\u4EC0\u4E48\u5355\u7EBF\u7A0B\u90A3\u4E48\u5FEB\u6211\u89C9\u5F97\u4E3B\u8981\u6709\u4EE5\u4E0B\u51E0\u4E2A\u539F\u56E0\uFF1A</p><ul><li>Redis \u7684\u5927\u90E8\u5206\u64CD\u4F5C\u90FD\u5728\u5185\u5B58\u4E2D\u5B8C\u6210\uFF0C\u5185\u5B58\u4E2D\u7684\u6267\u884C\u6548\u7387\u672C\u8EAB\u5C31\u5F88\u5FEB\uFF0C\u5E76\u4E14\u91C7\u7528\u4E86\u9AD8\u6548\u7684\u6570\u636E\u7ED3\u6784\uFF0C\u6BD4\u5982\u54C8\u5E0C\u8868\u548C\u8DF3\u8868\u3002</li><li>\u4F7F\u7528\u5355\u7EBF\u7A0B\u907F\u514D\u4E86\u591A\u7EBF\u7A0B\u7684\u7ADE\u4E89\uFF0C\u7701\u53BB\u4E86\u591A\u7EBF\u7A0B\u5207\u6362\u5E26\u6765\u7684\u65F6\u95F4\u548C\u6027\u80FD\u5F00\u9500\uFF0C\u5E76\u4E14\u4E0D\u4F1A\u51FA\u73B0\u6B7B\u9501\u3002</li><li>\u91C7\u7528 I/O \u591A\u8DEF\u590D\u7528\u673A\u5236\u5904\u7406\u5927\u91CF\u5BA2\u6237\u7AEF\u7684 Socket \u8BF7\u6C42\uFF0C\u56E0\u4E3A\u8FD9\u662F\u57FA\u4E8E\u975E\u963B\u585E\u7684 I/O \u6A21\u578B\uFF0C\u8FD9\u5C31\u8BA9 Redis \u53EF\u4EE5\u9AD8\u6548\u5730\u8FDB\u884C\u7F51\u7EDC\u901A\u4FE1\uFF0CI/O \u7684\u8BFB\u5199\u6D41\u7A0B\u4E5F\u4E0D\u518D\u963B\u585E\u3002</li></ul><p>\u9762\u8BD5\u5B98\uFF1A\u4E0D\u9519\uFF0C\u90A3 <strong>Redis \u662F\u5982\u4F55\u5B9E\u73B0\u6570\u636E\u4E0D\u4E22\u5931\u7684\u5462</strong>\uFF1F</p><p>\u5C0F\u4E8C\uFF1A</p><p>Redis \u6570\u636E\u662F\u5B58\u50A8\u5728\u5185\u5B58\u4E2D\u7684\uFF0C\u4E3A\u4E86\u4FDD\u8BC1 Redis \u6570\u636E\u4E0D\u4E22\u5931\uFF0C\u90A3\u5C31\u8981\u628A\u6570\u636E\u4ECE\u5185\u5B58\u5B58\u50A8\u5230\u78C1\u76D8\u4E0A\uFF0C\u4EE5\u4FBF\u5728\u670D\u52A1\u5668\u91CD\u542F\u540E\u8FD8\u80FD\u591F\u4ECE\u78C1\u76D8\u4E2D\u6062\u590D\u539F\u6709\u6570\u636E\uFF0C\u8FD9\u5C31\u662F Redis \u7684\u6570\u636E\u6301\u4E45\u5316\u3002Redis \u6570\u636E\u6301\u4E45\u5316\u6709\u4E09\u79CD\u65B9\u5F0F\u3002</p><p><strong>1\uFF09AOF \u65E5\u5FD7\uFF08Append Only File\uFF0C\u6587\u4EF6\u8FFD\u52A0\u65B9\u5F0F\uFF09</strong>\uFF1A\u8BB0\u5F55\u6240\u6709\u7684\u64CD\u4F5C\u547D\u4EE4\uFF0C\u5E76\u4EE5\u6587\u672C\u7684\u5F62\u5F0F\u8FFD\u52A0\u5230\u6587\u4EF6\u4E2D\u3002</p><p><strong>2\uFF09RDB \u5FEB\u7167\uFF08Redis DataBase\uFF09</strong>\uFF1A\u5C06\u67D0\u4E00\u4E2A\u65F6\u523B\u7684\u5185\u5B58\u6570\u636E\uFF0C\u4EE5\u4E8C\u8FDB\u5236\u7684\u65B9\u5F0F\u5199\u5165\u78C1\u76D8\u3002</p><p><strong>3\uFF09\u6DF7\u5408\u6301\u4E45\u5316\u65B9\u5F0F</strong>\uFF1ARedis 4.0 \u65B0\u589E\u4E86\u6DF7\u5408\u6301\u4E45\u5316\u7684\u65B9\u5F0F\uFF0C\u96C6\u6210\u4E86 RDB \u548C AOF \u7684\u4F18\u70B9\u3002</p><p>\u9762\u8BD5\u5B98\uFF1A\u90A3\u4F60\u5206\u522B\u8BF4\u8BF4 <strong>AOF \u548C RDB \u7684\u5B9E\u73B0\u539F\u7406</strong>\u5427\u3002</p><p>\u5C0F\u4E8C\uFF1A</p><p>AOF \u91C7\u7528\u7684\u662F\u5199\u540E\u65E5\u5FD7\u7684\u65B9\u5F0F\uFF0CRedis \u5148\u6267\u884C\u547D\u4EE4\u628A\u6570\u636E\u5199\u5165\u5185\u5B58\uFF0C\u7136\u540E\u518D\u8BB0\u5F55\u65E5\u5FD7\u5230\u6587\u4EF6\u4E2D\u3002AOF \u65E5\u5FD7\u8BB0\u5F55\u7684\u662F\u64CD\u4F5C\u547D\u4EE4\uFF0C\u4E0D\u662F\u5B9E\u9645\u7684\u6570\u636E\uFF0C\u5982\u679C\u91C7\u7528 AOF \u65B9\u6CD5\u505A\u6545\u969C\u6062\u590D\u65F6\u9700\u8981\u5C06\u5168\u91CF\u65E5\u5FD7\u90FD\u6267\u884C\u4E00\u904D\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mianjing/redis12question-1.png" alt=""></p><p>RDB \u91C7\u7528\u7684\u662F\u5185\u5B58\u5FEB\u7167\u7684\u65B9\u5F0F\uFF0C\u5B83\u8BB0\u5F55\u7684\u662F\u67D0\u4E00\u65F6\u523B\u7684\u6570\u636E\uFF0C\u800C\u4E0D\u662F\u64CD\u4F5C\uFF0C\u6240\u4EE5\u91C7\u7528 RDB \u65B9\u6CD5\u505A\u6545\u969C\u6062\u590D\u65F6\u53EA\u9700\u8981\u76F4\u63A5\u628A RDB \u6587\u4EF6\u8BFB\u5165\u5185\u5B58\u5373\u53EF\uFF0C\u5B9E\u73B0\u5FEB\u901F\u6062\u590D\u3002</p><p>\u9762\u8BD5\u5B98\uFF1A\u4F60\u521A\u63D0\u5230\u4E86 AOF \u91C7\u7528\u7684\u662F \u201C\u5199\u540E\u65E5\u5FD7\u201D \u7684\u65B9\u5F0F\uFF0C\u6211\u4EEC\u5E73\u65F6\u7528\u7684 MySQL \u5219\u91C7\u7528\u7684\u662F \u201C\u5199\u524D\u65E5\u5FD7\u201D\uFF0C\u90A3 <strong>Redis \u4E3A\u4EC0\u4E48\u8981\u5148\u6267\u884C\u547D\u4EE4\uFF0C\u518D\u628A\u6570\u636E\u5199\u5165\u65E5\u5FD7\u5462</strong>\uFF1F</p><p>\u5C0F\u4E8C\uFF1A\u8FD9\u4E2A\u4E3B\u8981\u662F\u7531\u4E8E Redis \u5728\u5199\u5165\u65E5\u5FD7\u4E4B\u524D\uFF0C\u4E0D\u5BF9\u547D\u4EE4\u8FDB\u884C\u8BED\u6CD5\u68C0\u67E5\uFF0C\u6240\u4EE5\u53EA\u8BB0\u5F55\u6267\u884C\u6210\u529F\u7684\u547D\u4EE4\uFF0C\u907F\u514D\u51FA\u73B0\u8BB0\u5F55\u9519\u8BEF\u547D\u4EE4\u7684\u60C5\u51B5\uFF0C\u800C\u4E14\u5728\u547D\u4EE4\u6267\u884C\u540E\u518D\u5199\u65E5\u5FD7\u4E0D\u4F1A\u963B\u585E\u5F53\u524D\u7684\u5199\u64CD\u4F5C\u3002</p><p>\u9762\u8BD5\u5B98\uFF1A<strong>\u90A3\u540E\u5199\u65E5\u5FD7\u53C8\u6709\u4EC0\u4E48\u98CE\u9669\u5462</strong>\uFF1F</p><p>\u5C0F\u4E8C\uFF1A\u6211... \u8FD9\u4E2A\u6211\u4E0D\u4F1A\u3002</p><p>\u9762\u8BD5\u5B98\uFF1A</p><p>\u597D\u5427\uFF0C\u540E\u5199\u65E5\u5FD7\u4E3B\u8981\u6709\u4E24\u4E2A\u98CE\u9669\u53EF\u80FD\u4F1A\u53D1\u751F\uFF1A</p><ul><li><strong>\u6570\u636E\u53EF\u80FD\u4F1A\u4E22\u5931</strong>\uFF1A\u5982\u679C Redis \u521A\u6267\u884C\u5B8C\u547D\u4EE4\uFF0C\u6B64\u65F6\u53D1\u751F\u6545\u969C\u5B95\u673A\uFF0C\u4F1A\u5BFC\u81F4\u8FD9\u6761\u547D\u4EE4\u5B58\u5728\u4E22\u5931\u7684\u98CE\u9669\u3002</li><li><strong>\u53EF\u80FD\u963B\u585E\u5176\u4ED6\u64CD\u4F5C</strong>\uFF1AAOF \u65E5\u5FD7\u5176\u5B9E\u4E5F\u662F\u5728\u4E3B\u7EBF\u7A0B\u4E2D\u6267\u884C\uFF0C\u6240\u4EE5\u5F53 Redis \u628A\u65E5\u5FD7\u6587\u4EF6\u5199\u5165\u78C1\u76D8\u7684\u65F6\u5019\uFF0C\u8FD8\u662F\u4F1A\u963B\u585E\u540E\u7EED\u7684\u64CD\u4F5C\u65E0\u6CD5\u6267\u884C\u3002</li></ul><p>\u6211\u8FD8\u6709\u4E2A\u95EE\u9898\u662F <strong>RDB \u505A\u5FEB\u7167\u65F6\u4F1A\u963B\u585E\u7EBF\u7A0B\u5417</strong>\uFF1F</p><p>\u5C0F\u4E8C\uFF1ARedis \u63D0\u4F9B\u4E86\u4E24\u4E2A\u547D\u4EE4\u6765\u751F\u6210 RDB \u5FEB\u7167\u6587\u4EF6\uFF0C\u5206\u522B\u662F save \u548C bgsave\u3002save \u547D\u4EE4\u5728\u4E3B\u7EBF\u7A0B\u4E2D\u6267\u884C\uFF0C\u4F1A\u5BFC\u81F4\u963B\u585E\u3002\u800C bgsave \u547D\u4EE4\u5219\u4F1A\u521B\u5EFA\u4E00\u4E2A\u5B50\u8FDB\u7A0B\uFF0C\u7528\u4E8E\u5199\u5165 RDB \u6587\u4EF6\u7684\u64CD\u4F5C\uFF0C\u907F\u514D\u4E86\u5BF9\u4E3B\u7EBF\u7A0B\u7684\u963B\u585E\uFF0C\u8FD9\u4E5F\u662F Redis RDB \u7684\u9ED8\u8BA4\u914D\u7F6E\u3002</p><p>\u9762\u8BD5\u5B98\uFF1A<strong>RDB \u505A\u5FEB\u7167\u7684\u65F6\u5019\u6570\u636E\u80FD\u4FEE\u6539\u5417</strong>\uFF1F</p><p>\u5C0F\u4E8C\uFF1Asave \u662F\u540C\u6B65\u7684\u4F1A\u963B\u585E\u5BA2\u6237\u7AEF\u547D\u4EE4\uFF0Cbgsave \u7684\u65F6\u5019\u662F\u53EF\u4EE5\u4FEE\u6539\u7684\u3002</p><p>\u9762\u8BD5\u5B98\uFF1A\u90A3 Redis \u662F<strong>\u600E\u4E48\u89E3\u51B3\u5728 bgsave \u505A\u5FEB\u7167\u7684\u65F6\u5019\u5141\u8BB8\u6570\u636E\u4FEE\u6539\u5462</strong>\uFF1F</p><p>\u5C0F\u4E8C\uFF1A\u989D\uFF0C\u8FD9\u4E2A\u6211\u4E0D\u592A\u6E05\u695A...</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mianjing/redis12question-2.png" alt=""></p><p>\u9762\u8BD5\u5B98\uFF1A</p><p>\u8FD9\u91CC\u4E3B\u8981\u662F\u5229\u7528 bgsave \u7684\u5B50\u7EBF\u7A0B\u5B9E\u73B0\u7684\uFF0C\u5177\u4F53\u64CD\u4F5C\u5982\u4E0B\uFF1A</p><ul><li>\u5982\u679C\u4E3B\u7EBF\u7A0B\u6267\u884C\u8BFB\u64CD\u4F5C\uFF0C\u5219\u4E3B\u7EBF\u7A0B\u548C bgsave \u5B50\u8FDB\u7A0B\u4E92\u76F8\u4E0D\u5F71\u54CD\uFF1B</li><li>\u5982\u679C\u4E3B\u7EBF\u7A0B\u6267\u884C\u5199\u64CD\u4F5C\uFF0C\u5219\u88AB\u4FEE\u6539\u7684\u6570\u636E\u4F1A\u590D\u5236\u4E00\u4EFD\u526F\u672C\uFF0C\u7136\u540E bgsave \u5B50\u8FDB\u7A0B\u4F1A\u628A\u8BE5\u526F\u672C\u6570\u636E\u5199\u5165 RDB \u6587\u4EF6\uFF0C\u5728\u8FD9\u4E2A\u8FC7\u7A0B\u4E2D\uFF0C\u4E3B\u7EBF\u7A0B\u4ECD\u7136\u53EF\u4EE5\u76F4\u63A5\u4FEE\u6539\u539F\u6765\u7684\u6570\u636E\u3002</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mianjing/redis12question-3.png" alt=""></p><p>\u8981\u6CE8\u610F\uFF0CRedis \u5BF9 RDB \u7684\u6267\u884C\u9891\u7387\u975E\u5E38\u91CD\u8981\uFF0C\u56E0\u4E3A\u8FD9\u4F1A\u5F71\u54CD\u5FEB\u7167\u6570\u636E\u7684\u5B8C\u6574\u6027\u4EE5\u53CA Redis \u7684\u7A33\u5B9A\u6027\uFF0C\u6240\u4EE5\u5728 Redis 4.0 \u540E\uFF0C\u589E\u52A0\u4E86 AOF \u548C RDB \u6DF7\u5408\u7684\u6570\u636E\u6301\u4E45\u5316\u673A\u5236\uFF1A \u628A\u6570\u636E\u4EE5 RDB \u7684\u65B9\u5F0F\u5199\u5165\u6587\u4EF6\uFF0C\u518D\u5C06\u540E\u7EED\u7684\u64CD\u4F5C\u547D\u4EE4\u4EE5 AOF \u7684\u683C\u5F0F\u5B58\u5165\u6587\u4EF6\uFF0C\u65E2\u4FDD\u8BC1\u4E86 Redis \u91CD\u542F\u901F\u5EA6\uFF0C\u53C8\u964D\u4F4E\u6570\u636E\u4E22\u5931\u98CE\u9669\u3002</p><p>\u5C0F\u4E8C\uFF1A\u5B66\u5230\u4E86\u5B66\u5230\u4E86\u3002</p><p>\u9762\u8BD5\u5B98\uFF1A\u90A3\u4F60\u518D\u8DDF\u6211\u8BF4\u8BF4 <strong>Redis \u5982\u4F55\u5B9E\u73B0\u9AD8\u53EF\u7528</strong>\u5427\uFF1F</p><p>\u5C0F\u4E8C\uFF1ARedis \u5B9E\u73B0\u9AD8\u53EF\u7528\u4E3B\u8981\u6709\u4E09\u79CD\u65B9\u5F0F\uFF1A\u4E3B\u4ECE\u590D\u5236\u3001\u54E8\u5175\u6A21\u5F0F\uFF0C\u4EE5\u53CA Redis \u96C6\u7FA4\u3002</p><p><strong>1\uFF09\u4E3B\u4ECE\u590D\u5236</strong></p><p>\u5C06\u4ECE\u524D\u7684\u4E00\u53F0 Redis \u670D\u52A1\u5668\uFF0C\u540C\u6B65\u6570\u636E\u5230\u591A\u53F0\u4ECE Redis \u670D\u52A1\u5668\u4E0A\uFF0C\u5373\u4E00\u4E3B\u591A\u4ECE\u7684\u6A21\u5F0F\uFF0C\u8FD9\u4E2A\u8DDF MySQL \u4E3B\u4ECE\u590D\u5236\u7684\u539F\u7406\u4E00\u6837\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mianjing/redis12question-4.png" alt=""></p><p><strong>2\uFF09\u54E8\u5175\u6A21\u5F0F</strong></p><p>\u4F7F\u7528 Redis \u4E3B\u4ECE\u670D\u52A1\u7684\u65F6\u5019\uFF0C\u4F1A\u6709\u4E00\u4E2A\u95EE\u9898\uFF0C\u5C31\u662F\u5F53 Redis \u7684\u4E3B\u4ECE\u670D\u52A1\u5668\u51FA\u73B0\u6545\u969C\u5B95\u673A\u65F6\uFF0C\u9700\u8981\u624B\u52A8\u8FDB\u884C\u6062\u590D\uFF0C\u4E3A\u4E86\u89E3\u51B3\u8FD9\u4E2A\u95EE\u9898\uFF0CRedis \u589E\u52A0\u4E86\u54E8\u5175\u6A21\u5F0F\uFF08\u56E0\u4E3A\u54E8\u5175\u6A21\u5F0F\u505A\u5230\u4E86\u53EF\u4EE5\u76D1\u63A7\u4E3B\u4ECE\u670D\u52A1\u5668\uFF0C\u5E76\u4E14\u63D0\u4F9B\u81EA\u52A8\u5BB9\u707E\u6062\u590D\u7684\u529F\u80FD\uFF09\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mianjing/redis12question-5.png" alt=""></p><p><strong>3\uFF09Redis Cluster\uFF08\u96C6\u7FA4\uFF09</strong></p><p>Redis Cluster \u662F\u4E00\u79CD\u5206\u5E03\u5F0F\u53BB\u4E2D\u5FC3\u5316\u7684\u8FD0\u884C\u6A21\u5F0F\uFF0C\u662F\u5728 Redis 3.0 \u7248\u672C\u4E2D\u63A8\u51FA\u7684 Redis \u96C6\u7FA4\u65B9\u6848\uFF0C\u5B83\u5C06\u6570\u636E\u5206\u5E03\u5728\u4E0D\u540C\u7684\u670D\u52A1\u5668\u4E0A\uFF0C\u4EE5\u6B64\u6765\u964D\u4F4E\u7CFB\u7EDF\u5BF9\u5355\u4E3B\u8282\u70B9\u7684\u4F9D\u8D56\uFF0C\u4ECE\u800C\u63D0\u9AD8 Redis \u670D\u52A1\u7684\u8BFB\u5199\u6027\u80FD\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mianjing/redis12question-6.png" alt=""></p><p>\u9762\u8BD5\u5B98\uFF1A\u4F7F\u7528\u54E8\u5175\u6A21\u5F0F\u5728\u6570\u636E\u4E0A\u6709\u526F\u672C\u6570\u636E\u505A\u4FDD\u8BC1\uFF0C\u5728\u53EF\u7528\u6027\u4E0A\u53C8\u6709\u54E8\u5175\u76D1\u63A7\uFF0C\u4E00\u65E6 master \u5B95\u673A\u4F1A\u9009\u4E3E salve \u8282\u70B9\u4E3A master \u8282\u70B9\uFF0C\u8FD9\u79CD\u5DF2\u7ECF\u6EE1\u8DB3\u4E86\u6211\u4EEC\u7684\u751F\u4EA7\u73AF\u5883\u9700\u8981\uFF0C<strong>\u90A3\u4E3A\u4EC0\u4E48\u8FD8\u9700\u8981\u4F7F\u7528\u96C6\u7FA4\u6A21\u5F0F\u5462</strong>\uFF1F</p><p>\u5C0F\u4E8C\uFF1A\u54E8\u5175\u6A21\u5F0F\u5F52\u6839\u8282\u70B9\u8FD8\u662F\u4E3B\u4ECE\u6A21\u5F0F\uFF0C\u5728\u4E3B\u4ECE\u6A21\u5F0F\u4E0B\u6211\u4EEC\u53EF\u4EE5\u901A\u8FC7\u589E\u52A0 salve \u8282\u70B9\u6765\u6269\u5C55\u8BFB\u5E76\u53D1\u80FD\u529B\uFF0C\u4F46\u662F\u6CA1\u529E\u6CD5\u6269\u5C55\u5199\u80FD\u529B\u548C\u5B58\u50A8\u80FD\u529B\uFF0C\u5B58\u50A8\u80FD\u529B\u53EA\u80FD\u662F master \u8282\u70B9\u80FD\u591F\u627F\u8F7D\u7684\u4E0A\u9650\u3002\u6240\u4EE5\u4E3A\u4E86\u6269\u5C55\u5199\u80FD\u529B\u548C\u5B58\u50A8\u80FD\u529B\uFF0C\u6211\u4EEC\u5C31\u9700\u8981\u5F15\u5165\u96C6\u7FA4\u6A21\u5F0F\u3002</p><p>\u9762\u8BD5\u5B98\uFF1A\u96C6\u7FA4\u4E2D\u90A3\u4E48\u591A Master \u8282\u70B9\uFF0C<strong>Redis Cluster \u5728\u5B58\u50A8\u7684\u65F6\u5019\u5982\u4F55\u786E\u5B9A\u9009\u62E9\u54EA\u4E2A\u8282\u70B9\u5462</strong>\uFF1F</p><p>\u5C0F\u4E8C\uFF1A\u8FD9\u5E94\u8BE5\u662F\u4F7F\u7528\u4E86\u67D0\u79CD hash \u7B97\u6CD5\uFF0C\u4F46\u662F\u6211\u4E0D\u592A\u6E05\u695A\u3002\u3002\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mianjing/redis12question-7.png" alt=""></p><p>\u9762\u8BD5\u5B98\uFF1A\u90A3\u597D\uFF0C\u4ECA\u5929\u7684\u9762\u8BD5\u5C31\u5230\u8FD9\u91CC\u5427\uFF0C\u4F60\u5148\u56DE\u53BB\u7B49\u6211\u4EEC\u7684\u9762\u8BD5\u901A\u77E5\u3002</p><p>\u5C0F\u4E8C\uFF1A\u597D\u7684\uFF0C\u8C22\u8C22\u9762\u8BD5\u5B98\uFF0C\u4F60\u80FD\u544A\u8BC9\u6211 Redis Cluster \u600E\u4E48\u5B9E\u73B0\u8282\u70B9\u9009\u62E9\u7684\u5417\uFF1F</p><p>\u9762\u8BD5\u5B98\uFF1A</p><p>Redis Cluster \u91C7\u7528\u7684\u662F\u7C7B\u4E00\u81F4\u6027\u54C8\u5E0C\u7B97\u6CD5\u5B9E\u73B0\u8282\u70B9\u9009\u62E9\u7684\uFF0C\u81F3\u4E8E\u4EC0\u4E48\u662F\u4E00\u81F4\u6027\u54C8\u5E0C\u7B97\u6CD5\u4F60\u81EA\u5DF1\u56DE\u53BB\u770B\u770B\u3002</p><p>Redis Cluster \u5C06\u81EA\u5DF1\u5206\u6210\u4E86 16384 \u4E2A Slot\uFF08\u69FD\u4F4D\uFF09\uFF0C\u54C8\u5E0C\u69FD\u7C7B\u4F3C\u4E8E\u6570\u636E\u5206\u533A\uFF0C\u6BCF\u4E2A\u952E\u503C\u5BF9\u90FD\u4F1A\u6839\u636E\u5B83\u7684 key\uFF0C\u88AB\u6620\u5C04\u5230\u4E00\u4E2A\u54C8\u5E0C\u69FD\u4E2D\uFF0C\u5177\u4F53\u6267\u884C\u8FC7\u7A0B\u5206\u4E3A\u4E24\u5927\u6B65\u3002</p><p>1\uFF09\u6839\u636E\u952E\u503C\u5BF9\u7684 key\uFF0C\u6309\u7167 CRC16 \u7B97\u6CD5\u8BA1\u7B97\u4E00\u4E2A 16 bit \u7684\u503C\u3002</p><p>2\uFF09\u518D\u7528 16bit \u503C\u5BF9 16384 \u53D6\u6A21\uFF0C\u5F97\u5230 0~16383 \u8303\u56F4\u5185\u7684\u6A21\u6570\uFF0C\u6BCF\u4E2A\u6A21\u6570\u4EE3\u8868\u4E00\u4E2A\u76F8\u5E94\u7F16\u53F7\u7684\u54C8\u5E0C\u69FD\u3002</p><p>\u6BCF\u4E2A Redis \u8282\u70B9\u8D1F\u8D23\u5904\u7406\u4E00\u90E8\u5206\u69FD\u4F4D\uFF0C\u5047\u5982\u4F60\u6709\u4E09\u4E2A master \u8282\u70B9 ABC\uFF0C\u6BCF\u4E2A\u8282\u70B9\u8D1F\u8D23\u7684\u69FD\u4F4D\u5982\u4E0B\uFF1A</p><table><thead><tr><th>\u8282\u70B9</th><th>\u5904\u7406\u69FD\u4F4D</th></tr></thead><tbody><tr><td>A</td><td>0-5000</td></tr><tr><td>B</td><td>5001 - 10000</td></tr><tr><td>C</td><td>10001 - 16383</td></tr></tbody></table><p>\u8FD9\u6837\u5C31\u5B9E\u73B0\u4E86 cluster \u8282\u70B9\u7684\u9009\u62E9\u3002</p><hr><p>\u6587\u7AE0\u6765\u6E90\u4E8EJAVA\u65E5\u77E5\u5F55 \uFF0C\u4F5C\u8005\u98D8\u6E3AJam \u8F6C\u8F7D\u94FE\u63A5\uFF1Ahttps://mp.weixin.qq.com/s/GFUHslsSm96fJbhsCkFe_w</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p>',74),a=[r];function n(d,o){return t(),s("div",null,a)}var l=e(i,[["render",n],["__file","redis12question.html.vue"]]);export{l as default};
diff --git a/dist/assets/reentrantLock.html.d3a77dd6.js b/dist/assets/reentrantLock.html.8b519bdc.js
similarity index 99%
rename from dist/assets/reentrantLock.html.d3a77dd6.js
rename to dist/assets/reentrantLock.html.8b519bdc.js
index 757ffe99..24128417 100644
--- a/dist/assets/reentrantLock.html.d3a77dd6.js
+++ b/dist/assets/reentrantLock.html.8b519bdc.js
@@ -1,4 +1,4 @@
-import{_ as t}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o,c,a as n,b as a,e as l,d as e}from"./app.a0271b9c.js";const i={},u=l(`<h1 id="\u6DF1\u5165\u7406\u89E3java\u5E76\u53D1\u91CD\u5165\u9501reentrantlock" tabindex="-1"><a class="header-anchor" href="#\u6DF1\u5165\u7406\u89E3java\u5E76\u53D1\u91CD\u5165\u9501reentrantlock" aria-hidden="true">#</a> \u6DF1\u5165\u7406\u89E3Java\u5E76\u53D1\u91CD\u5165\u9501ReentrantLock</h1><p>ReentrantLock\u91CD\u5165\u9501\uFF0C\u662F\u5B9E\u73B0Lock\u63A5\u53E3\u7684\u4E00\u4E2A\u7C7B\uFF0C\u4E5F\u662F\u5728\u5B9E\u9645\u7F16\u7A0B\u4E2D\u4F7F\u7528\u9891\u7387\u5F88\u9AD8\u7684\u4E00\u4E2A\u9501\uFF0C<strong>\u652F\u6301\u91CD\u5165\u6027\uFF0C\u8868\u793A\u80FD\u591F\u5BF9\u5171\u4EAB\u8D44\u6E90\u80FD\u591F\u91CD\u590D\u52A0\u9501\uFF0C\u5373\u5F53\u524D\u7EBF\u7A0B\u83B7\u53D6\u8BE5\u9501\u518D\u6B21\u83B7\u53D6\u4E0D\u4F1A\u88AB\u963B\u585E</strong>\u3002</p><p>\u8981\u60F3\u652F\u6301\u91CD\u5165\u6027\uFF0C\u5C31\u8981\u89E3\u51B3\u4E24\u4E2A\u95EE\u9898\uFF1A</p><ol><li><p>\u5728\u7EBF\u7A0B\u83B7\u53D6\u9501\u7684\u65F6\u5019\uFF0C\u5982\u679C\u5DF2\u7ECF\u83B7\u53D6\u9501\u7684\u7EBF\u7A0B\u662F\u5F53\u524D\u7EBF\u7A0B\u7684\u8BDD\u5219\u76F4\u63A5\u518D\u6B21\u83B7\u53D6\u6210\u529F\uFF1B</p></li><li><p>\u7531\u4E8E\u9501\u4F1A\u88AB\u83B7\u53D6n\u6B21\uFF0C\u90A3\u4E48\u53EA\u6709\u9501\u5728\u88AB\u91CA\u653E\u540C\u6837\u7684n\u6B21\u4E4B\u540E\uFF0C\u8BE5\u9501\u624D\u7B97\u662F\u5B8C\u5168\u91CA\u653E\u6210\u529F\u3002</p></li></ol><p>\u6211\u4EEC\u77E5\u9053\uFF0C\u540C\u6B65\u7EC4\u4EF6\u4E3B\u8981\u662F\u901A\u8FC7\u91CD\u5199AQS\u7684\u51E0\u4E2Aprotected\u65B9\u6CD5\u6765\u8868\u8FBE\u81EA\u5DF1\u7684\u540C\u6B65\u8BED\u4E49\u3002\u9488\u5BF9\u7B2C\u4E00\u4E2A\u95EE\u9898\uFF0C\u6211\u4EEC\u6765\u770B\u770BReentrantLock\u662F\u600E\u6837\u5B9E\u73B0\u7684\uFF0C\u4EE5\u975E\u516C\u5E73\u9501\u4E3A\u4F8B\uFF0C\u5224\u65AD\u5F53\u524D\u7EBF\u7A0B\u80FD\u5426\u83B7\u5F97\u9501\u4E3A\u4F8B\uFF0C\u6838\u5FC3\u65B9\u6CD5\u4E3AnonfairTryAcquire\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">final</span> <span class="token keyword">boolean</span> <span class="token function">nonfairTryAcquire</span><span class="token punctuation">(</span><span class="token keyword">int</span> acquires<span class="token punctuation">)</span> <span class="token punctuation">{</span>
+import{_ as t}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o,c,a as n,b as a,e as l,d as e}from"./app.615e41d8.js";const i={},u=l(`<h1 id="\u6DF1\u5165\u7406\u89E3java\u5E76\u53D1\u91CD\u5165\u9501reentrantlock" tabindex="-1"><a class="header-anchor" href="#\u6DF1\u5165\u7406\u89E3java\u5E76\u53D1\u91CD\u5165\u9501reentrantlock" aria-hidden="true">#</a> \u6DF1\u5165\u7406\u89E3Java\u5E76\u53D1\u91CD\u5165\u9501ReentrantLock</h1><p>ReentrantLock\u91CD\u5165\u9501\uFF0C\u662F\u5B9E\u73B0Lock\u63A5\u53E3\u7684\u4E00\u4E2A\u7C7B\uFF0C\u4E5F\u662F\u5728\u5B9E\u9645\u7F16\u7A0B\u4E2D\u4F7F\u7528\u9891\u7387\u5F88\u9AD8\u7684\u4E00\u4E2A\u9501\uFF0C<strong>\u652F\u6301\u91CD\u5165\u6027\uFF0C\u8868\u793A\u80FD\u591F\u5BF9\u5171\u4EAB\u8D44\u6E90\u80FD\u591F\u91CD\u590D\u52A0\u9501\uFF0C\u5373\u5F53\u524D\u7EBF\u7A0B\u83B7\u53D6\u8BE5\u9501\u518D\u6B21\u83B7\u53D6\u4E0D\u4F1A\u88AB\u963B\u585E</strong>\u3002</p><p>\u8981\u60F3\u652F\u6301\u91CD\u5165\u6027\uFF0C\u5C31\u8981\u89E3\u51B3\u4E24\u4E2A\u95EE\u9898\uFF1A</p><ol><li><p>\u5728\u7EBF\u7A0B\u83B7\u53D6\u9501\u7684\u65F6\u5019\uFF0C\u5982\u679C\u5DF2\u7ECF\u83B7\u53D6\u9501\u7684\u7EBF\u7A0B\u662F\u5F53\u524D\u7EBF\u7A0B\u7684\u8BDD\u5219\u76F4\u63A5\u518D\u6B21\u83B7\u53D6\u6210\u529F\uFF1B</p></li><li><p>\u7531\u4E8E\u9501\u4F1A\u88AB\u83B7\u53D6n\u6B21\uFF0C\u90A3\u4E48\u53EA\u6709\u9501\u5728\u88AB\u91CA\u653E\u540C\u6837\u7684n\u6B21\u4E4B\u540E\uFF0C\u8BE5\u9501\u624D\u7B97\u662F\u5B8C\u5168\u91CA\u653E\u6210\u529F\u3002</p></li></ol><p>\u6211\u4EEC\u77E5\u9053\uFF0C\u540C\u6B65\u7EC4\u4EF6\u4E3B\u8981\u662F\u901A\u8FC7\u91CD\u5199AQS\u7684\u51E0\u4E2Aprotected\u65B9\u6CD5\u6765\u8868\u8FBE\u81EA\u5DF1\u7684\u540C\u6B65\u8BED\u4E49\u3002\u9488\u5BF9\u7B2C\u4E00\u4E2A\u95EE\u9898\uFF0C\u6211\u4EEC\u6765\u770B\u770BReentrantLock\u662F\u600E\u6837\u5B9E\u73B0\u7684\uFF0C\u4EE5\u975E\u516C\u5E73\u9501\u4E3A\u4F8B\uFF0C\u5224\u65AD\u5F53\u524D\u7EBF\u7A0B\u80FD\u5426\u83B7\u5F97\u9501\u4E3A\u4F8B\uFF0C\u6838\u5FC3\u65B9\u6CD5\u4E3AnonfairTryAcquire\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">final</span> <span class="token keyword">boolean</span> <span class="token function">nonfairTryAcquire</span><span class="token punctuation">(</span><span class="token keyword">int</span> acquires<span class="token punctuation">)</span> <span class="token punctuation">{</span>
     <span class="token keyword">final</span> <span class="token class-name">Thread</span> current <span class="token operator">=</span> <span class="token class-name">Thread</span><span class="token punctuation">.</span><span class="token function">currentThread</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
     <span class="token keyword">int</span> c <span class="token operator">=</span> <span class="token function">getState</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
     <span class="token comment">//1. \u5982\u679C\u8BE5\u9501\u672A\u88AB\u4EFB\u4F55\u7EBF\u7A0B\u5360\u6709\uFF0C\u8BE5\u9501\u80FD\u88AB\u5F53\u524D\u7EBF\u7A0B\u83B7\u53D6</span>
diff --git a/dist/assets/rumen.html.f241efd5.js b/dist/assets/rumen.html.27e01d35.js
similarity index 99%
rename from dist/assets/rumen.html.f241efd5.js
rename to dist/assets/rumen.html.27e01d35.js
index b4c6f57a..9673c2f7 100644
--- a/dist/assets/rumen.html.f241efd5.js
+++ b/dist/assets/rumen.html.27e01d35.js
@@ -1,4 +1,4 @@
-import{_ as p}from"./plugin-vue_export-helper.21dcd24c.js";import{r as i,o,c,a as n,b as e,e as t,d as s}from"./app.a0271b9c.js";const l={},r=t('<h1 id="redis\u5165\u95E8-\u9002\u5408\u65B0\u624B" tabindex="-1"><a class="header-anchor" href="#redis\u5165\u95E8-\u9002\u5408\u65B0\u624B" aria-hidden="true">#</a> Redis\u5165\u95E8(\u9002\u5408\u65B0\u624B)</h1><p>\u8BF4\u8D77\u6765\uFF0C\u53EF\u80FD\u6709\u4E9B\u5C0F\u4F19\u4F34\u4F1A\u4E0D\u76F8\u4FE1\uFF0C\u6211\u662F\u7B2C\u4E00\u6B21\u7528 Redis\uFF0C\u771F\u7684\u3002\u56E0\u4E3A\u516C\u53F8\u5C0F\uFF0C\u4E1A\u52A1\u91CF\u5C0F\uFF0CRedis \u6839\u672C\u6D3E\u4E0D\u4E0A\u7528\u573A\u3002\u4E0D\u8FC7\uFF0C\u6700\u8FD1\u6253\u7B97\u628A\u7CFB\u7EDF\u5347\u7EA7\u4E00\u4E0B\uFF0C\u987A\u5E26\u628A\u5F53\u4E0B\u65F6\u9AE6\u7684\u6280\u672F\u5165\u4E2A\u95E8\uFF0C\u201C\u4E0E\u65F6\u4FF1\u8FDB\u201D\u561B\uFF0C\u867D\u7136\u8FDB\u7684\u6709\u201C\u4E00\u70B9\u70B9\u201D\u665A\uFF08\u6CE8\u610F\u53CC\u5F15\u53F7\uFF09\u3002</p><p>\u4F5C\u4E3A\u4E00\u540D\u5BCC\u6709\u8D23\u4EFB\u5FC3\u7684\u6280\u672F\u535A\u4E3B\uFF0C\u6211\u89C9\u5F97\u6709\u5FC5\u8981\u628A\u6211\u5165\u95E8 Redis \u7684\u8FC7\u7A0B\u5206\u4EAB\u51FA\u6765\uFF0C\u4F9B\u4E00\u4E9B\u5C0F\u4F19\u4F34\u4F5C\u4E3A\u53C2\u8003\u3002\u8981\u662F\u6211\u54EA\u91CC\u5199\u9519\u4E86\uFF0C\u522B\u5BA2\u6C14\uFF0C\u8FC7\u6765\u7ED9\u6211\u4E00\u5DF4\u638C\uFF0C\u5C31\u884C\u4E86\uFF08\u6E29\u67D4\u70B9\uFF0C\u522B\u6253\u80BF\uFF0C\u5F71\u54CD\u989C\u503C\u5C31\u4E0D\u597D\u4E86\uFF09\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/rumen-fe7d042b-efed-469c-9460-fb3bc1d4c041.jpg" alt=""></p><h3 id="_01\u3001redis-\u662F\u4EC0\u4E48" tabindex="-1"><a class="header-anchor" href="#_01\u3001redis-\u662F\u4EC0\u4E48" aria-hidden="true">#</a> 01\u3001Redis \u662F\u4EC0\u4E48</h3><p>Redis \u662F\u4E92\u8054\u7F51\u6280\u672F\u9886\u57DF\u4E2D\u4F7F\u7528\u6700\u5E7F\u6CDB\u7684\u5B58\u50A8\u4E2D\u95F4\u4EF6\uFF0C\u5B83\u662F <strong>Re</strong>mote <strong>Di</strong>ctionary <strong>S</strong>ervice \u4E09\u4E2A\u5355\u8BCD\u4E2D\u52A0\u7C97\u5B57\u6BCD\u7684\u7EC4\u5408\u3002\u4F60\u522B\u8BF4\uFF0C\u7EC4\u5408\u8D77\u6765\u540E\u5FF5\u7740\u633A\u81EA\u7136\u7684\u3002</p><p>Redis \u4EE5\u8D85\u9AD8\u7684\u6027\u80FD\u3001\u5B8C\u7F8E\u7684\u6587\u6863\u3001\u7B80\u6D01\u7684\u6E90\u7801\u8457\u79F0\uFF0C\u56FD\u5185\u5916\u5F88\u591A\u5927\u578B\u4E92\u8054\u7F51\u516C\u53F8\u90FD\u5728\u7528\uFF0C\u6BD4\u5982\u8BF4\u963F\u91CC\u3001\u817E\u8BAF\u3001GitHub\u3001Stack Overflow \u7B49\u7B49\u3002\u5B83\u7684\u7248\u672C\u66F4\u65B0\u975E\u5E38\u7684\u5FEB\uFF0C\u529F\u80FD\u4E5F\u8D8A\u6765\u8D8A\u5F3A\u5927\uFF0C\u6700\u521D\u53EA\u662F\u7528\u6765\u4F5C\u4E3A\u7F13\u5B58\u6570\u636E\u5E93\uFF0C\u73B0\u5728\u5DF2\u7ECF\u53EF\u4EE5\u7528\u5B83\u6765\u5B9E\u73B0\u6D88\u606F\u961F\u5217\u4E86\u3002</p><p>\u53EF\u4EE5\u8FD9\u4E48\u8BF4\u5427\uFF0C\u638C\u63E1 Redis \u5DF2\u7ECF\u53D8\u6210\u4E86\u4E00\u9879\u540E\u7AEF\u5DE5\u7A0B\u5E08\u5FC5\u987B\u5177\u5907\u7684\u57FA\u7840\u6280\u80FD\u3002</p><p>Redis \u7684\u4F5C\u8005\u662F\u4E00\u540D\u610F\u5927\u5229\u4EBA\uFF0C\u7F51\u540D Antirez\uFF0C\u957F\u76F8\u8FD8\u662F\u8FC7\u5F97\u53BB\u7684\uFF0C\u611F\u5174\u8DA3\u7684\u5C0F\u4F19\u4F34\u53EF\u4EE5 Google \u4E00\u4E0B\u3002\u77E5\u9053\u4E3A\u4EC0\u4E48 Redis \u7684\u9ED8\u8BA4\u7AEF\u53E3\u662F 6379 \u5417\uFF1F</p><p>\u636E\u8BF4\u662F\u624B\u673A\u952E\u76D8\u4E0A\u201CMERZ\u201D\u7684\u4F4D\u7F6E\u51B3\u5B9A\u7684\uFF0C\u5C0F\u4F19\u4F34\u4EEC\u53EF\u4EE5\u6253\u5F00\u81EA\u5DF1\u624B\u673A\u4E0A\u4E5D\u5BAB\u683C\u952E\u76D8\u611F\u53D7\u4E00\u4E0B\u3002\u201CMERZ\u201D\u662F\u4EC0\u4E48\u610F\u601D\u5462\uFF1F\u636E\u8BF4\u662F\u201C\u611A\u8822\u201D\u7684\u610F\u601D\u3002\u8FD9\uFF1F\u662F\u4E0D\u662F\u611F\u89C9\u7A0B\u5E8F\u5458\u7684\u751F\u6D3B\u4E2D\u8FD8\u662F\u6709\u86EE\u591A\u795E\u79D8\u8272\u5F69\u7684\uFF1F</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/rumen-ced599df-4791-4777-970f-20ceeeb39e68.jpg" alt=""></p><h3 id="_02\u3001\u5B89\u88C5-redis" tabindex="-1"><a class="header-anchor" href="#_02\u3001\u5B89\u88C5-redis" aria-hidden="true">#</a> 02\u3001\u5B89\u88C5 Redis</h3><p>Redis \u9488\u5BF9\u4E0D\u540C\u7684\u64CD\u4F5C\u7CFB\u7EDF\u6709\u4E0D\u540C\u7684\u5B89\u88C5\u65B9\u5F0F\uFF0C\u6211\u4EEC\u8FD9\u7BC7\u5165\u95E8\u7684\u6587\u7AE0\u5C31\u4EE5 Windows \u4E3A\u4F8B\u5427\u3002</p><p>\u4E0B\u8F7D\u5730\u5740\u5982\u4E0B\uFF1A</p>',14),d={href:"https://github.com/MicrosoftArchive/redis/releases",target:"_blank",rel:"noopener noreferrer"},u=s("https://github.com/MicrosoftArchive/redis/releases"),v=t(`<p>Windows \u6700\u65B0\u7684\u7248\u672C\u662F 3.2.100\u3002\u4ECE\u4E0B\u56FE\u4E2D\u53EF\u4EE5\u770B\u5F97\u51FA\uFF0CRedis \u7684\u4F53\u79EF\u975E\u5E38\u7684\u8F7B\u91CF\u7EA7\uFF0C\u8FD8\u4E0D\u5230 6 M\u3002\u4F53\u79EF\u8D8A\u5C0F\uFF0C\u8BA9\u6211\u611F\u89C9 Redis \u8D8A\u725B\u903C\uFF0C\u4F60\u662F\u4E0D\u662F\u4E5F\u6709\u8FD9\u79CD\u611F\u89C9\uFF1F</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/rumen-a6709cca-d3a3-4381-b110-0ff37d384f27.jpg" alt=""></p><p>\u6709\u4E24\u79CD\u5B89\u88C5\u65B9\u5F0F\uFF0C\u7B2C\u4E00\u79CD\u662F msi \u7684\u65B9\u5F0F\uFF0C\u53CC\u51FB\u8FD0\u884C\u540E\u5B89\u88C5\uFF1B\u7B2C\u4E8C\u79CD\u662F\u514D\u5B89\u88C5\uFF0C\u7EFF\u8272\u7248\uFF0C\u53EA\u9700\u8981\u628A zip \u5305\u89E3\u538B\u5C31\u53EF\u4EE5\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/rumen-f3fc9852-7505-45ed-8ce2-d16f1d888251.jpg" alt=""></p><p>\u91CC\u9762\u6709\u4E00\u4EFD\u82F1\u6587\u7248\u7684\u6587\u6863\u2014\u2014Windows Service Documentation.docx\uFF0C\u6559\u6211\u4EEC\u5982\u4F55\u5B89\u88C5 Redis \u670D\u52A1\u3001\u5982\u4F55\u542F\u52A8\u3001\u5982\u4F55\u5173\u95ED\uFF0C\u4EE5\u53CA\u5982\u4F55\u4F7F\u7528\u81EA\u5B9A\u4E49\u7AEF\u53E3\u542F\u52A8\u670D\u52A1\u3002</p><p>\u6253\u5F00\u547D\u4EE4\u884C\uFF0C\u8FDB\u5165\u5230\u5F53\u524D\u89E3\u538B\u540E\u7684\u76EE\u5F55\uFF0C\u8F93\u5165\u542F\u52A8\u547D\u4EE4\uFF1A</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>redis-server redis.windows.conf
+import{_ as p}from"./plugin-vue_export-helper.21dcd24c.js";import{r as i,o,c,a as n,b as e,e as t,d as s}from"./app.615e41d8.js";const l={},r=t('<h1 id="redis\u5165\u95E8-\u9002\u5408\u65B0\u624B" tabindex="-1"><a class="header-anchor" href="#redis\u5165\u95E8-\u9002\u5408\u65B0\u624B" aria-hidden="true">#</a> Redis\u5165\u95E8(\u9002\u5408\u65B0\u624B)</h1><p>\u8BF4\u8D77\u6765\uFF0C\u53EF\u80FD\u6709\u4E9B\u5C0F\u4F19\u4F34\u4F1A\u4E0D\u76F8\u4FE1\uFF0C\u6211\u662F\u7B2C\u4E00\u6B21\u7528 Redis\uFF0C\u771F\u7684\u3002\u56E0\u4E3A\u516C\u53F8\u5C0F\uFF0C\u4E1A\u52A1\u91CF\u5C0F\uFF0CRedis \u6839\u672C\u6D3E\u4E0D\u4E0A\u7528\u573A\u3002\u4E0D\u8FC7\uFF0C\u6700\u8FD1\u6253\u7B97\u628A\u7CFB\u7EDF\u5347\u7EA7\u4E00\u4E0B\uFF0C\u987A\u5E26\u628A\u5F53\u4E0B\u65F6\u9AE6\u7684\u6280\u672F\u5165\u4E2A\u95E8\uFF0C\u201C\u4E0E\u65F6\u4FF1\u8FDB\u201D\u561B\uFF0C\u867D\u7136\u8FDB\u7684\u6709\u201C\u4E00\u70B9\u70B9\u201D\u665A\uFF08\u6CE8\u610F\u53CC\u5F15\u53F7\uFF09\u3002</p><p>\u4F5C\u4E3A\u4E00\u540D\u5BCC\u6709\u8D23\u4EFB\u5FC3\u7684\u6280\u672F\u535A\u4E3B\uFF0C\u6211\u89C9\u5F97\u6709\u5FC5\u8981\u628A\u6211\u5165\u95E8 Redis \u7684\u8FC7\u7A0B\u5206\u4EAB\u51FA\u6765\uFF0C\u4F9B\u4E00\u4E9B\u5C0F\u4F19\u4F34\u4F5C\u4E3A\u53C2\u8003\u3002\u8981\u662F\u6211\u54EA\u91CC\u5199\u9519\u4E86\uFF0C\u522B\u5BA2\u6C14\uFF0C\u8FC7\u6765\u7ED9\u6211\u4E00\u5DF4\u638C\uFF0C\u5C31\u884C\u4E86\uFF08\u6E29\u67D4\u70B9\uFF0C\u522B\u6253\u80BF\uFF0C\u5F71\u54CD\u989C\u503C\u5C31\u4E0D\u597D\u4E86\uFF09\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/rumen-fe7d042b-efed-469c-9460-fb3bc1d4c041.jpg" alt=""></p><h3 id="_01\u3001redis-\u662F\u4EC0\u4E48" tabindex="-1"><a class="header-anchor" href="#_01\u3001redis-\u662F\u4EC0\u4E48" aria-hidden="true">#</a> 01\u3001Redis \u662F\u4EC0\u4E48</h3><p>Redis \u662F\u4E92\u8054\u7F51\u6280\u672F\u9886\u57DF\u4E2D\u4F7F\u7528\u6700\u5E7F\u6CDB\u7684\u5B58\u50A8\u4E2D\u95F4\u4EF6\uFF0C\u5B83\u662F <strong>Re</strong>mote <strong>Di</strong>ctionary <strong>S</strong>ervice \u4E09\u4E2A\u5355\u8BCD\u4E2D\u52A0\u7C97\u5B57\u6BCD\u7684\u7EC4\u5408\u3002\u4F60\u522B\u8BF4\uFF0C\u7EC4\u5408\u8D77\u6765\u540E\u5FF5\u7740\u633A\u81EA\u7136\u7684\u3002</p><p>Redis \u4EE5\u8D85\u9AD8\u7684\u6027\u80FD\u3001\u5B8C\u7F8E\u7684\u6587\u6863\u3001\u7B80\u6D01\u7684\u6E90\u7801\u8457\u79F0\uFF0C\u56FD\u5185\u5916\u5F88\u591A\u5927\u578B\u4E92\u8054\u7F51\u516C\u53F8\u90FD\u5728\u7528\uFF0C\u6BD4\u5982\u8BF4\u963F\u91CC\u3001\u817E\u8BAF\u3001GitHub\u3001Stack Overflow \u7B49\u7B49\u3002\u5B83\u7684\u7248\u672C\u66F4\u65B0\u975E\u5E38\u7684\u5FEB\uFF0C\u529F\u80FD\u4E5F\u8D8A\u6765\u8D8A\u5F3A\u5927\uFF0C\u6700\u521D\u53EA\u662F\u7528\u6765\u4F5C\u4E3A\u7F13\u5B58\u6570\u636E\u5E93\uFF0C\u73B0\u5728\u5DF2\u7ECF\u53EF\u4EE5\u7528\u5B83\u6765\u5B9E\u73B0\u6D88\u606F\u961F\u5217\u4E86\u3002</p><p>\u53EF\u4EE5\u8FD9\u4E48\u8BF4\u5427\uFF0C\u638C\u63E1 Redis \u5DF2\u7ECF\u53D8\u6210\u4E86\u4E00\u9879\u540E\u7AEF\u5DE5\u7A0B\u5E08\u5FC5\u987B\u5177\u5907\u7684\u57FA\u7840\u6280\u80FD\u3002</p><p>Redis \u7684\u4F5C\u8005\u662F\u4E00\u540D\u610F\u5927\u5229\u4EBA\uFF0C\u7F51\u540D Antirez\uFF0C\u957F\u76F8\u8FD8\u662F\u8FC7\u5F97\u53BB\u7684\uFF0C\u611F\u5174\u8DA3\u7684\u5C0F\u4F19\u4F34\u53EF\u4EE5 Google \u4E00\u4E0B\u3002\u77E5\u9053\u4E3A\u4EC0\u4E48 Redis \u7684\u9ED8\u8BA4\u7AEF\u53E3\u662F 6379 \u5417\uFF1F</p><p>\u636E\u8BF4\u662F\u624B\u673A\u952E\u76D8\u4E0A\u201CMERZ\u201D\u7684\u4F4D\u7F6E\u51B3\u5B9A\u7684\uFF0C\u5C0F\u4F19\u4F34\u4EEC\u53EF\u4EE5\u6253\u5F00\u81EA\u5DF1\u624B\u673A\u4E0A\u4E5D\u5BAB\u683C\u952E\u76D8\u611F\u53D7\u4E00\u4E0B\u3002\u201CMERZ\u201D\u662F\u4EC0\u4E48\u610F\u601D\u5462\uFF1F\u636E\u8BF4\u662F\u201C\u611A\u8822\u201D\u7684\u610F\u601D\u3002\u8FD9\uFF1F\u662F\u4E0D\u662F\u611F\u89C9\u7A0B\u5E8F\u5458\u7684\u751F\u6D3B\u4E2D\u8FD8\u662F\u6709\u86EE\u591A\u795E\u79D8\u8272\u5F69\u7684\uFF1F</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/rumen-ced599df-4791-4777-970f-20ceeeb39e68.jpg" alt=""></p><h3 id="_02\u3001\u5B89\u88C5-redis" tabindex="-1"><a class="header-anchor" href="#_02\u3001\u5B89\u88C5-redis" aria-hidden="true">#</a> 02\u3001\u5B89\u88C5 Redis</h3><p>Redis \u9488\u5BF9\u4E0D\u540C\u7684\u64CD\u4F5C\u7CFB\u7EDF\u6709\u4E0D\u540C\u7684\u5B89\u88C5\u65B9\u5F0F\uFF0C\u6211\u4EEC\u8FD9\u7BC7\u5165\u95E8\u7684\u6587\u7AE0\u5C31\u4EE5 Windows \u4E3A\u4F8B\u5427\u3002</p><p>\u4E0B\u8F7D\u5730\u5740\u5982\u4E0B\uFF1A</p>',14),d={href:"https://github.com/MicrosoftArchive/redis/releases",target:"_blank",rel:"noopener noreferrer"},u=s("https://github.com/MicrosoftArchive/redis/releases"),v=t(`<p>Windows \u6700\u65B0\u7684\u7248\u672C\u662F 3.2.100\u3002\u4ECE\u4E0B\u56FE\u4E2D\u53EF\u4EE5\u770B\u5F97\u51FA\uFF0CRedis \u7684\u4F53\u79EF\u975E\u5E38\u7684\u8F7B\u91CF\u7EA7\uFF0C\u8FD8\u4E0D\u5230 6 M\u3002\u4F53\u79EF\u8D8A\u5C0F\uFF0C\u8BA9\u6211\u611F\u89C9 Redis \u8D8A\u725B\u903C\uFF0C\u4F60\u662F\u4E0D\u662F\u4E5F\u6709\u8FD9\u79CD\u611F\u89C9\uFF1F</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/rumen-a6709cca-d3a3-4381-b110-0ff37d384f27.jpg" alt=""></p><p>\u6709\u4E24\u79CD\u5B89\u88C5\u65B9\u5F0F\uFF0C\u7B2C\u4E00\u79CD\u662F msi \u7684\u65B9\u5F0F\uFF0C\u53CC\u51FB\u8FD0\u884C\u540E\u5B89\u88C5\uFF1B\u7B2C\u4E8C\u79CD\u662F\u514D\u5B89\u88C5\uFF0C\u7EFF\u8272\u7248\uFF0C\u53EA\u9700\u8981\u628A zip \u5305\u89E3\u538B\u5C31\u53EF\u4EE5\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/rumen-f3fc9852-7505-45ed-8ce2-d16f1d888251.jpg" alt=""></p><p>\u91CC\u9762\u6709\u4E00\u4EFD\u82F1\u6587\u7248\u7684\u6587\u6863\u2014\u2014Windows Service Documentation.docx\uFF0C\u6559\u6211\u4EEC\u5982\u4F55\u5B89\u88C5 Redis \u670D\u52A1\u3001\u5982\u4F55\u542F\u52A8\u3001\u5982\u4F55\u5173\u95ED\uFF0C\u4EE5\u53CA\u5982\u4F55\u4F7F\u7528\u81EA\u5B9A\u4E49\u7AEF\u53E3\u542F\u52A8\u670D\u52A1\u3002</p><p>\u6253\u5F00\u547D\u4EE4\u884C\uFF0C\u8FDB\u5165\u5230\u5F53\u524D\u89E3\u538B\u540E\u7684\u76EE\u5F55\uFF0C\u8F93\u5165\u542F\u52A8\u547D\u4EE4\uFF1A</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>redis-server redis.windows.conf
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>\u7136\u540E\u4F60\u5C31\u4F1A\u770B\u5230 Redis \u542F\u52A8\u540E\u7684\u6B22\u8FCE\u753B\u9762\uFF0C\u5DE6\u8FB9\u8FD9\u4E2A\u76D2\u5B50\u611F\u89C9\u597D\u6709\u827A\u672F\u611F\u554A\uFF01\u6709\u5C0F\u4F19\u4F34\u77E5\u9053\u662F\u600E\u4E48\u751F\u6210\u7684\u5417\uFF1F</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/rumen-69b11133-7aac-4f8a-aa1e-9e8af576ad32.jpg" alt=""></p><p>\u8FD8\u6709\u4E00\u4E9B\u5176\u4ED6\u7684\u63D0\u793A\u4FE1\u606F\uFF1A</p><ul><li>Redis \u5F53\u524D\u7684\u7248\u672C\u53F7\u4E3A 3.2.100</li><li>\u7AEF\u53E3\u662F 6379</li><li>\u8FDB\u7A0B ID\uFF0C\u4E5F\u5C31\u662F PID \u4E3A 12636</li><li>Redis \u5B98\u65B9\u5730\u5740\u4E3A\uFF1Ahttp://redis.io</li></ul><p>\u90A3\u5982\u4F55\u505C\u6B62\u670D\u52A1\u5462\uFF1F\u53EF\u4EE5\u76F4\u63A5\u6309\u4E0B <code>Ctrl+C</code> \u7EC4\u5408\u952E\u2014\u2014\u7C97\u66B4\u3001\u58C1\u549A\uFF08\u5F53\u7136\u53EF\u4EE5\u76F4\u63A5\u70B9\u53F3\u4E0A\u89D2\u7684\u53C9\u53F7\uFF09\u3002</p><p>PS\uFF1A\u672C\u6765\u60F3\u7528 Linux \u7248\u6216\u8005 OSX \u7248\u7684\uFF0C\u6015\u5165\u95E8\u7684\u5C0F\u4F19\u4F34\u6CA1\u6709\u73AF\u5883\u3002\u540E\u9762\u53EF\u4EE5\u6574\u4E00\u4E2A\u3002</p><h3 id="_03\u3001redis-\u7684\u6570\u636E\u7ED3\u6784" tabindex="-1"><a class="header-anchor" href="#_03\u3001redis-\u7684\u6570\u636E\u7ED3\u6784" aria-hidden="true">#</a> 03\u3001Redis \u7684\u6570\u636E\u7ED3\u6784</h3><p>Redis \u6709 5 \u79CD\u57FA\u7840\u6570\u636E\u7ED3\u6784\uFF0CString\u3001Hash\u3001List\u3001Set\u3001SortedSet\uFF0C\u4E5F\u662F\u5B66 Redis \u5FC5\u987B\u638C\u63E1\u7684\u3002\u9664\u6B64\u4E4B\u5916\uFF0C\u8FD8\u6709 HyperLogLog\u3001Geo\u3001Pub/Sub\uFF0C\u7B97\u662F\u9AD8\u7EA7\u6570\u636E\u7ED3\u6784\u4E86\u3002\u6211\u4EEC\u8FD9\u7BC7\u5165\u95E8\u7684\u6587\u7AE0\u5C31\u4EE5 String \u4E3A\u4F8B\u5427\u3002</p><p>String \u7ED3\u6784\u4F7F\u7528\u975E\u5E38\u5E7F\u6CDB\uFF0C\u6BD4\u5982\u8BF4\u628A\u7528\u6237\u7684\u767B\u9646\u4FE1\u606F\u8F6C\u6210 JSON \u5B57\u7B26\u4E32\u540E\u7F13\u5B58\u8D77\u6765\uFF0C\u7B49\u9700\u8981\u53D6\u51FA\u7684\u65F6\u5019\u518D\u53CD\u5E8F\u5217\u5316\u4E00\u6B21\u3002</p><p>\u5C0F\u4F19\u4F34\u4EEC\u5E94\u8BE5\u90FD\u77E5\u9053\uFF0CJava \u7684 String \u662F\u4E0D\u53EF\u53D8\u7684\uFF0C\u65E0\u6CD5\u4FEE\u6539\u3002Redis \u7684 String \u662F\u52A8\u6001\u7684\uFF0C\u53EF\u4EE5\u4FEE\u6539\u7684\uFF0C\u4E24\u8005\u4E0D\u540C\u54E6\u3002\u5173\u4E8E Redis \u7684 String \u7ED3\u6784\uFF0C\u6211\u89C9\u5F97\u8001\u94B1\u7684 Redis \u6559\u7A0B\u4E0A\u8BB2\u5F97\u975E\u5E38\u660E\u767D\uFF0C\u5927\u5BB6\u4E00\u8D77\u62DC\u8BFB\u4E0B\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/rumen-d9aca13e-053e-4aea-a8cb-d77b01e5035a.jpg" alt=""></p><blockquote><p>Redis \u7684 String \u5728\u5185\u90E8\u7ED3\u6784\u5B9E\u73B0\u4E0A\u7C7B\u4F3C\u4E8E Java \u7684 ArrayList\uFF0C\u91C7\u7528\u9884\u5206\u914D\u5197\u4F59\u7A7A\u95F4\u7684\u65B9\u5F0F\u6765\u51CF\u5C11\u5185\u5B58\u7684\u9891\u7E41\u5206\u914D\u3002\u5982\u4E0A\u56FE\u6240\u793A\uFF0C\u5F53\u524D\u5B57\u7B26\u4E32\u5B9E\u9645\u5206\u914D\u7684\u7A7A\u95F4\u4E3A capacity\uFF0C\u4E00\u822C\u9AD8\u4E8E\u5B9E\u9645\u7684\u5B57\u7B26\u4E32\u957F\u5EA6 len\u3002\u5F53\u5B57\u7B26\u4E32\u957F\u5EA6\u5C0F\u4E8E 1M \u65F6\uFF0C\u6269\u5BB9\u662F\u5BF9\u73B0\u6709\u7A7A\u95F4\u7684\u6210\u500D\u589E\u957F\uFF1B\u5982\u679C\u957F\u5EA6\u8D85\u8FC7 1M \u65F6\uFF0C\u6269\u5BB9\u4E00\u6B21\u53EA\u4F1A\u591A\u589E\u52A0 1M \u7684\u7A7A\u95F4\u3002\u6700\u5927\u957F\u5EA6\u4E3A 512M\u3002</p></blockquote><h3 id="_04\u3001\u5B9E\u64CD-redis" tabindex="-1"><a class="header-anchor" href="#_04\u3001\u5B9E\u64CD-redis" aria-hidden="true">#</a> 04\u3001\u5B9E\u64CD Redis</h3><p>\u597D\u4E86\u597D\u4E86\uFF0C\u6211\u4F30\u8BA1\u5F88\u591A\u5C0F\u4F19\u4F34\u4EEC\u5DF2\u7ECF\u6574\u88C5\u5F85\u53D1\uFF0C\u51C6\u5907\u5B9E\u64CD\u4E00\u628A\u4E86\u3002\u8FD9\u5C31\u6765\u3002</p><p>Redis \u7684\u89E3\u538B\u76EE\u5F55\u4E0B\u6709\u4E00\u4E2A\u540D\u53EB redis-cli.exe \u7684\u6587\u4EF6\uFF0C\u8FD9\u662F Redis \u81EA\u5E26\u7684\u4E00\u4E2A\u5BA2\u6237\u7AEF\u5DE5\u5177\uFF0C\u53EF\u4EE5\u7528\u6765\u8FDE\u63A5\u4E4B\u524D\u6211\u4EEC\u542F\u52A8\u597D\u7684 Redis \u670D\u52A1\u3002\u53CC\u51FB\u542F\u52A8\u5B83\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/rumen-4fd63521-b07e-41c6-bcbd-b7acb2a81344.jpg" alt=""></p><p>\u8FD9\u4E2A\u5BA2\u6237\u7AEF\u8FD8\u662F\u975E\u5E38\u667A\u80FD\u7684\uFF0C\u5F53\u952E\u5165\u547D\u4EE4\u7684\u65F6\u5019\uFF0C\u4F1A\u8DF3\u51FA\u5BF9\u5E94\u7684\u63D0\u793A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/rumen-6ca5d00d-4b5d-4475-a49c-9937e22f97af.jpg" alt=""></p><p>\u5F53\u6309\u4E0B\u7A7A\u683C\u8DDF\u8FDB\u5173\u952E\u5B57\u7684\u65F6\u5019\uFF0C\u5BF9\u5E94\u4F4D\u7F6E\u4E0A\u7684\u63D0\u793A\u4F1A\u81EA\u52A8\u6D88\u5931\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/rumen-656ec70a-c053-44ab-b078-a5c77386bee6.jpg" alt=""></p><p>\u4EE5\u4E0B\u662F\u5B8C\u6574\u7684\u952E\u503C\u5BF9\u6D4B\u8BD5\u547D\u4EE4\uFF0C\u5C0F\u4F19\u4F34\u4EEC\u53EF\u4EE5\u6309\u7167\u683C\u5F0F\u52A8\u624B\u5B9E\u64CD\u4E00\u628A\u3002</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&gt; set name cmower
 OK
 &gt; get name
diff --git a/dist/assets/rumen.html.4002e397.js b/dist/assets/rumen.html.3f2b5ec9.js
similarity index 99%
rename from dist/assets/rumen.html.4002e397.js
rename to dist/assets/rumen.html.3f2b5ec9.js
index c571e0bc..3c1e5922 100644
--- a/dist/assets/rumen.html.4002e397.js
+++ b/dist/assets/rumen.html.3f2b5ec9.js
@@ -1,4 +1,4 @@
-import{_ as e}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o as c,c as i,a as n,b as t,d as a,e as o}from"./app.a0271b9c.js";const l={},u=n("h1",{id:"mongodb\u6700\u57FA\u7840\u5165\u95E8\u6559\u7A0B",tabindex:"-1"},[n("a",{class:"header-anchor",href:"#mongodb\u6700\u57FA\u7840\u5165\u95E8\u6559\u7A0B","aria-hidden":"true"},"#"),a(" MongoDB\u6700\u57FA\u7840\u5165\u95E8\u6559\u7A0B")],-1),r=n("p",null,"\u6211\u4EE5\u4E3A\u6211\u5BF9MongoDB\u5341\u5206\u4E86\u89E3\uFF0C\u76F4\u5230\u6211\u9047\u5230\u4E86\u5B57\u8282\u9762\u8BD5\u5B98",-1),d=a("\u6709\u65F6\u5019\u4E0D\u5F97\u4E0D\u611F\u6168\u4E00\u4E0B\uFF0C\u7CFB\u7EDF\u5347\u7EA7\u771F\u7684\u662F\u597D\u5904\u591A\u591A\uFF0C\u4E0D\u4EC5\u8BA9\u6211\u6709\u673A\u4F1A\u91CD\u6784\u4E86\u4E4B\u524D\u7684\u70C2\u4EE3\u7801\uFF0C\u4E5F\u6EE1\u8DB3\u4E86\u6211\u79EF\u6781\u597D\u5B66\u7684\u865A\u8363\u5FC3\u3002\u4F60\u770B\uFF0C"),b={href:"https://mp.weixin.qq.com/s/NPJkMy5RppyFk9QhzHxhrw",target:"_blank",rel:"noopener noreferrer"},m=a("Redis \u5165\u95E8"),g=a("\u4E86\u3001"),k={href:"https://mp.weixin.qq.com/s/ZjsZxle7m_dfmVwVkq2ayg",target:"_blank",rel:"noopener noreferrer"},v=a("Elasticsearch \u5165\u95E8"),h=a("\u4E86\uFF0C\u8FD9\u6B21\u53C8\u8981\u5165\u95E8 MongoDB\uFF0C\u611F\u89C9\u81EA\u5DF1\u53D8\u79C3\u7684\u540C\u65F6\uFF0C\u4E5F\u53D8\u5F3A\u5927\u4E86\u3002"),f=o('<p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mongodb/rumen-a1f2d203-e586-4ca1-8556-e1a94c6b411e.jpg" alt=""></p><p>\u5C0F\u4F19\u4F34\u4EEC\u5728\u7EE7\u7EED\u9605\u8BFB\u4E4B\u524D\uFF0C\u6211\u5FC5\u987B\u8981\u58F0\u660E\u4E00\u70B9\uFF0C\u6211\u5BF9 MongoDB \u5E76\u6CA1\u6709\u8FDB\u884C\u5F88\u6DF1\u5165\u7684\u7814\u7A76\uFF0C\u4EC5\u4EC5\u662F\u56E0\u4E3A\u8981\u7528\uFF0C\u5C31\u5B66\u4E00\u4E0B\u3002\u4F46\u4F5C\u4E3A\u4E00\u540D\u8D1F\u8D23\u4EFB\u7684\u6280\u672F\u535A\u4E3B\uFF0C\u6211\u662F\u82B1\u4E86\u5FC3\u601D\u7684\uFF0C\u8FD9\u7BC7\u5165\u95E8\u6559\u7A0B\uFF0C\u5C0F\u4F19\u4F34\u4EEC\u8BFB\u5B8C\u540E\u7EDD\u5BF9\u4F1A\u611F\u5230\u6EE1\u610F\uFF0C\u5FCD\u4E0D\u4F4F\u70B9\u8D5E\u3002</p><p>\u5F53\u7136\u4E86\uFF0C\u5C0F\u4F19\u4F34\u4EEC\u9047\u5230\u6587\u7AE0\u4E2D\u6709\u9519\u8BEF\u7684\u5730\u65B9\uFF0C\u4E0D\u8981\u624B\u4E0B\u7559\u60C5\uFF0C\u53EF\u4EE5\u7EC4\u56E2\u8FC7\u6765\u6376\u6211\uFF0C\u4F46\u8981\u4FDD\u8BC1\u4E00\u70B9\uFF0C\u4E0D\u8981\u6253\u8138\uFF0C\u6211\u6015\u6BC1\u5BB9\u3002</p><h3 id="_01\u3001mongodb-\u662F\u4EC0\u4E48" tabindex="-1"><a class="header-anchor" href="#_01\u3001mongodb-\u662F\u4EC0\u4E48" aria-hidden="true">#</a> 01\u3001MongoDB \u662F\u4EC0\u4E48</h3><blockquote><p>MongoDB \u662F\u4E00\u4E2A\u57FA\u4E8E\u5206\u5E03\u5F0F\u7684\u6587\u4EF6\u5B58\u50A8\u6570\u636E\u5E93\uFF0C\u65E8\u5728\u4E3A Web \u5E94\u7528\u63D0\u4F9B\u53EF\u6269\u5C55\u7684\u9AD8\u6027\u80FD\u6570\u636E\u5B58\u50A8\u89E3\u51B3\u65B9\u6848\u3002</p></blockquote><p>\u4EE5\u4E0A\u5F15\u7528\u6765\u81EA\u4E8E\u5B98\u65B9\uFF0C\u4E0D\u5F97\u4E0D\u8BF4\uFF0C\u89E3\u91CA\u5F97\u6587\u7EC9\u7EC9\u7684\u3002\u90A3\u5C31\u8BA9\u6211\u6765\u6362\u4E00\u79CD\u901A\u4FD7\u7684\u8BF4\u6CD5\u7ED9\u5C0F\u4F19\u4F34\u4EEC\u89E3\u91CA\u4E00\u4E0B\uFF0CMongoDB \u5C06\u6570\u636E\u5B58\u50A8\u4E3A\u4E00\u4E2A\u6587\u6863\uFF08\u7C7B\u4F3C\u4E8E JSON \u5BF9\u8C61\uFF09\uFF0C\u6570\u636E\u7ED3\u6784\u7531\u952E\u503C\u5BF9\u7EC4\u6210\uFF0C\u7C7B\u4F3C\u4E8E Java \u4E2D\u7684 Map\uFF0C\u901A\u8FC7 key \u7684\u65B9\u5F0F\u8BBF\u95EE\u8D77\u6765\u6548\u7387\u5C31\u9AD8\u5F97\u591A\uFF0C\u5BF9\u5427\uFF1F\u8FD9\u4E5F\u662F MongoDB \u6700\u91CD\u8981\u7684\u7279\u70B9\u3002</p><p>MongoDB \u63D0\u4F9B\u4E86\u4F01\u4E1A\u7248\uFF08\u529F\u80FD\u66F4\u5F3A\u5927\uFF09\u548C\u793E\u533A\u7248\uFF0C\u5BF9\u4E8E\u6211\u4EEC\u5F00\u53D1\u8005\u6765\u8BF4\uFF0C\u62FF\u793E\u533A\u7248\u6765\u5B66\u4E60\u548C\u4F7F\u7528\u5C31\u8DB3\u591F\u4E86\u3002MongoDB \u7684\u9A71\u52A8\u5305\u5F88\u591A\uFF0C\u5E38\u89C1\u7684\u7F16\u7A0B\u8BED\u8A00\u90FD\u6709\u8986\u76D6\u5230\uFF0C\u6BD4\u5982\u8BF4 Java\u3001JavaScript\u3001C++\u3001C#\u3001Python \u7B49\u7B49\u3002</p><p>\u5F88\u591A\u77E5\u540D\u7684\u4E92\u8054\u7F51\u516C\u53F8\u90FD\u5728\u7528 MongoDB\uFF0C\u6BD4\u5982\u8BF4\u8C37\u6B4C\u3001Facebook\u3001eBay \u7B49\u7B49\u3002\u603B\u4E4B\uFF0C\u503C\u5F97\u4FE1\u8D56\uFF0C\u5C0F\u4F19\u4F34\u4EEC\u653E\u5FC3\u5165\u95E8\uFF0C\u6280\u591A\u4E0D\u538B\u8EAB\u554A\uFF0C\u5C31\u5F53\u662F\u7ED9\u81EA\u5DF1\u4E00\u6B21\u5B66\u4E60\u7684\u673A\u4F1A\u3002</p><h3 id="_02\u3001\u5B89\u88C5-mongodb" tabindex="-1"><a class="header-anchor" href="#_02\u3001\u5B89\u88C5-mongodb" aria-hidden="true">#</a> 02\u3001\u5B89\u88C5 MongoDB</h3><p>MongoDB \u9488\u5BF9\u4E0D\u540C\u7684\u64CD\u4F5C\u7CFB\u7EDF\u6709\u4E0D\u540C\u7684\u5B89\u88C5\u5305\uFF0C\u6211\u4EEC\u8FD9\u7BC7\u5165\u95E8\u7684\u6587\u7AE0\u5C31\u4EE5 Windows \u4E3A\u4F8B\u5427\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mongodb/rumen-557ab648-e2c4-4309-8695-aeb7fbcba25b.jpg" alt=""></p><p>\u5B98\u7F51\u4E0B\u8F7D\u5730\u5740\u5982\u4E0B\uFF1A</p>',12),q={href:"https://www.mongodb.com/download-center/community",target:"_blank",rel:"noopener noreferrer"},_=a("https://www.mongodb.com/download-center/community"),j=o('<p>\u6700\u65B0\u7684\u7248\u672C\u662F 4.2.6\uFF0C\u6211\u9009\u62E9\u7684\u662F\u5B89\u88C5\u7248\uFF0Cmsi \u683C\u5F0F\u7684\uFF0C264M \u5DE6\u53F3\u3002\u4E0B\u8F7D\u5B8C\u5C31\u53EF\u4EE5\u53CC\u51FB\u8FD0\u884C\u5B89\u88C5\uFF0C\u50BB\u74DC\u5F0F\u7684\u3002</p><p>\u5EFA\u8BAE\u9009\u62E9\u300CCustom\u300D\u81EA\u5B9A\u4E49\u5B89\u88C5\uFF0C\u5982\u4E0B\u56FE\u6240\u793A\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mongodb/rumen-42330ff2-598a-40bf-b252-480704c6a531.jpg" alt=""></p><p>\u4EE5\u670D\u52A1\u6A21\u5F0F\u8FD0\u884C\uFF0C\u5E76\u914D\u7F6E\u597D\u6570\u636E\u548C\u65E5\u5FD7\u76EE\u5F55\uFF0C\u5982\u4E0B\u56FE\u6240\u793A\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mongodb/rumen-c71a31d4-5a99-4c12-93a9-348aa79bc086.jpg" alt=""></p><p>\u5EFA\u8BAE\u53D6\u6D88\u52FE\u9009\u5B89\u88C5 MongoDB \u7684\u56FE\u5F62\u5316\u5BA2\u6237\u7AEF\u5DE5\u5177\uFF0C\u5426\u5219\u5B89\u88C5\u901F\u5EA6\u6162\u5230\u4F60\u60F3\u8981\u53BB\u6263\u4F1A\u624B\u673A\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mongodb/rumen-84ea8b51-6b53-4500-86fa-0dcfa61b84cd.jpg" alt=""></p><p>\u5B89\u88C5\u5B8C\u6210\u540E\u8FDB\u5165\u5230 bin \u76EE\u5F55\u4E0B\uFF0C\u53CC\u51FB mongo.exe \u6587\u4EF6\u5C31\u53EF\u4EE5\u8FDE\u63A5\u5230 MongoDB \u670D\u52A1\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mongodb/rumen-bcf34981-0c2b-4f86-94e0-711dfb307371.jpg" alt=""></p><p>1\uFF09MongoDB \u7684\u9ED8\u8BA4\u7AEF\u53E3\u53F7\u4E3A 27017\u3002</p><p>2\uFF09MongoDB \u7684\u7248\u672C\u53F7\u4E3A 4.2.6\u3002</p><p>\u9ED8\u8BA4\u4F1A\u8FDE\u63A5\u5230 test \u6587\u6863\uFF08\u76F8\u5F53\u4E8E\u6570\u636E\uFF09\uFF0C\u53EF\u4EE5\u901A\u8FC7 db \u547D\u4EE4\u67E5\u8BE2\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mongodb/rumen-ded1c30c-9943-4061-8fa3-4562387b72cd.jpg" alt=""></p><p>\u8FD8\u53EF\u4EE5\u8FD0\u884C\u4E00\u4E9B\u7B80\u5355\u7684\u7B97\u672F\u8FD0\u7B97\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mongodb/rumen-22c1d414-6ba4-47dd-beb8-f1003f21083e.jpg" alt=""></p><p>\u90A3\u5982\u4F55\u505C\u6B62\u670D\u52A1\u5462\uFF1F\u53EF\u4EE5\u76F4\u63A5\u70B9\u51FB\u53F3\u4E0A\u89D2\u7684 X \u53F7\u2014\u2014\u7C97\u66B4\u3001\u58C1\u549A\u3002</p><h3 id="_03\u3001\u5B89\u88C5-robo-3t" tabindex="-1"><a class="header-anchor" href="#_03\u3001\u5B89\u88C5-robo-3t" aria-hidden="true">#</a> 03\u3001\u5B89\u88C5 Robo 3T</h3><p>Robo 3T \u63D0\u4F9B\u4E86\u5BF9 MongoDB \u548C SCRAM-SHA-256\uFF08\u5347\u7EA7\u7684 mongo shell\uFF09\u7684\u652F\u6301\uFF0C\u662F\u4E00\u6B3E\u8F7B\u91CF\u7EA7\u7684 MongoDB \u5BA2\u6237\u7AEF\u5DE5\u5177\u3002</p><p>\u4E0B\u8F7D\u5730\u5740\u5982\u4E0B\uFF1A</p>',19),D={href:"https://robomongo.org/download",target:"_blank",rel:"noopener noreferrer"},M=a("https://robomongo.org/download"),B=o(`<p>\u6700\u65B0\u7684\u7248\u672C\u662F 1.3\uFF0C\u9009\u62E9 zip \u683C\u5F0F\u8FDB\u884C\u4E0B\u8F7D\uFF0C23M \u5DE6\u53F3\u3002\u4E0B\u8F7D\u5B8C\u6210\u540E\uFF0C\u89E3\u538B\u5C31\u884C\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mongodb/rumen-b178e02c-23b6-4b54-92ec-3a170a8499d0.jpg" alt=""></p><p>\u5305\u76EE\u5F55\u4E0D\u518D\u4E00\u4E00\u89E3\u91CA\u4E86\uFF0C\u8FDB\u5165 bin \u76EE\u5F55\u4E0B\uFF0C\u53CC\u51FB\u8FD0\u884C robo3t.exe \u6587\u4EF6\uFF0C\u542F\u52A8 Robo 3T \u5BA2\u6237\u7AEF\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mongodb/rumen-99717a12-c90d-4a03-941d-f3857f503d44.jpg" alt=""></p><p>\u70B9\u51FB\u300CCreate\u300D\u521B\u5EFA\u4E00\u4E2A MongoDB \u7684\u8FDE\u63A5\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mongodb/rumen-11866209-6a60-4a6a-9ca9-fcd9279796f6.jpg" alt=""></p><p>\u8FDE\u63A5\u6210\u529F\u540E\uFF0C\u5C31\u53EF\u4EE5\u64CD\u4F5C MongoDB \u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mongodb/rumen-753dfcd7-1557-4837-9a7e-94b2ff9db72a.jpg" alt=""></p><p>\uFF08\u4E0D\u8FC7\uFF0C\u5C0F\u4F19\u4F34\u4EEC\u8FD9\u65F6\u5019\u4E5F\u4E0D\u592A\u77E5\u9053\u8BE5\u600E\u4E48\u64CD\u4F5C\uFF0C\u6BD5\u7ADF MongoDB \u7684\u4E00\u4E9B\u76F8\u5173\u6982\u5FF5\u8FD8\u4E0D\u6E05\u695A\uFF0C\u65E0\u4ECE\u4E0B\u624B\u554A\uFF09</p><h3 id="_04\u3001mongodb-\u7684\u76F8\u5173\u6982\u5FF5" tabindex="-1"><a class="header-anchor" href="#_04\u3001mongodb-\u7684\u76F8\u5173\u6982\u5FF5" aria-hidden="true">#</a> 04\u3001MongoDB \u7684\u76F8\u5173\u6982\u5FF5</h3><p>\u968F\u7740\u4E92\u8054\u7F51\u7684\u6781\u901F\u53D1\u5C55\uFF0C\u7528\u6237\u6570\u636E\u4E5F\u8D8A\u6765\u8D8A\u5E9E\u5927\uFF0CNoSQL \u6570\u636E\u5E93\u7684\u53D1\u5C55\u80FD\u591F\u5F88\u597D\u5730\u5904\u7406\u8FD9\u4E9B\u5927\u7684\u6570\u636E\uFF0CMongoDB \u662F NoSQL \u6570\u636E\u5E93\u4E2D\u7684\u4E00\u4E2A\u5178\u578B\u7684\u4EE3\u8868\u3002</p><p>\u8BF4\u5230\u8FD9\uFF0C\u53EF\u80FD\u6709\u4E9B\u5C0F\u4F19\u4F34\u4EEC\u8FD8\u4E0D\u77E5\u9053 NoSQL \u662F\u5565\u610F\u601D\uFF0C\u6211\u7B80\u5355\u89E3\u91CA\u4E00\u4E0B\u3002NoSQL \u53EF\u4E0D\u662F\u6CA1\u6709 SQL \u7684\u610F\u601D\uFF0C\u5B83\u5B9E\u9645\u7684\u542B\u4E49\u662F Not Only SQL\uFF0C\u4E5F\u5C31\u662F\u201C\u4E0D\u4EC5\u4EC5\u662F SQL\u201D\uFF0C\u6307\u7684\u662F\u975E\u5173\u7CFB\u578B\u6570\u636E\u5E93\uFF0C\u548C\u4F20\u7EDF\u7684\u5173\u7CFB\u578B\u6570\u636E\u5E93 MySQL\u3001Oracle \u4E0D\u540C\u3002</p><p>MongoDB \u547D\u540D\u6E90\u4E8E\u82F1\u6587\u5355\u8BCD hu<strong>mongo</strong>us\uFF0C\u610F\u601D\u662F\u300C\u5DE8\u5927\u65E0\u6BD4\u300D\uFF0C\u53EF\u4EE5\u770B\u5F97\u51FA MongoDB \u7684\u91CE\u5FC3\u3002MongoDB \u7684\u6570\u636E\u4EE5\u7C7B\u4F3C\u4E8E JSON \u683C\u5F0F\u7684\u4E8C\u8FDB\u5236\u6587\u6863\u5B58\u50A8\uFF1A</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>{
+import{_ as e}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o as c,c as i,a as n,b as t,d as a,e as o}from"./app.615e41d8.js";const l={},u=n("h1",{id:"mongodb\u6700\u57FA\u7840\u5165\u95E8\u6559\u7A0B",tabindex:"-1"},[n("a",{class:"header-anchor",href:"#mongodb\u6700\u57FA\u7840\u5165\u95E8\u6559\u7A0B","aria-hidden":"true"},"#"),a(" MongoDB\u6700\u57FA\u7840\u5165\u95E8\u6559\u7A0B")],-1),r=n("p",null,"\u6211\u4EE5\u4E3A\u6211\u5BF9MongoDB\u5341\u5206\u4E86\u89E3\uFF0C\u76F4\u5230\u6211\u9047\u5230\u4E86\u5B57\u8282\u9762\u8BD5\u5B98",-1),d=a("\u6709\u65F6\u5019\u4E0D\u5F97\u4E0D\u611F\u6168\u4E00\u4E0B\uFF0C\u7CFB\u7EDF\u5347\u7EA7\u771F\u7684\u662F\u597D\u5904\u591A\u591A\uFF0C\u4E0D\u4EC5\u8BA9\u6211\u6709\u673A\u4F1A\u91CD\u6784\u4E86\u4E4B\u524D\u7684\u70C2\u4EE3\u7801\uFF0C\u4E5F\u6EE1\u8DB3\u4E86\u6211\u79EF\u6781\u597D\u5B66\u7684\u865A\u8363\u5FC3\u3002\u4F60\u770B\uFF0C"),b={href:"https://mp.weixin.qq.com/s/NPJkMy5RppyFk9QhzHxhrw",target:"_blank",rel:"noopener noreferrer"},m=a("Redis \u5165\u95E8"),g=a("\u4E86\u3001"),k={href:"https://mp.weixin.qq.com/s/ZjsZxle7m_dfmVwVkq2ayg",target:"_blank",rel:"noopener noreferrer"},v=a("Elasticsearch \u5165\u95E8"),h=a("\u4E86\uFF0C\u8FD9\u6B21\u53C8\u8981\u5165\u95E8 MongoDB\uFF0C\u611F\u89C9\u81EA\u5DF1\u53D8\u79C3\u7684\u540C\u65F6\uFF0C\u4E5F\u53D8\u5F3A\u5927\u4E86\u3002"),f=o('<p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mongodb/rumen-a1f2d203-e586-4ca1-8556-e1a94c6b411e.jpg" alt=""></p><p>\u5C0F\u4F19\u4F34\u4EEC\u5728\u7EE7\u7EED\u9605\u8BFB\u4E4B\u524D\uFF0C\u6211\u5FC5\u987B\u8981\u58F0\u660E\u4E00\u70B9\uFF0C\u6211\u5BF9 MongoDB \u5E76\u6CA1\u6709\u8FDB\u884C\u5F88\u6DF1\u5165\u7684\u7814\u7A76\uFF0C\u4EC5\u4EC5\u662F\u56E0\u4E3A\u8981\u7528\uFF0C\u5C31\u5B66\u4E00\u4E0B\u3002\u4F46\u4F5C\u4E3A\u4E00\u540D\u8D1F\u8D23\u4EFB\u7684\u6280\u672F\u535A\u4E3B\uFF0C\u6211\u662F\u82B1\u4E86\u5FC3\u601D\u7684\uFF0C\u8FD9\u7BC7\u5165\u95E8\u6559\u7A0B\uFF0C\u5C0F\u4F19\u4F34\u4EEC\u8BFB\u5B8C\u540E\u7EDD\u5BF9\u4F1A\u611F\u5230\u6EE1\u610F\uFF0C\u5FCD\u4E0D\u4F4F\u70B9\u8D5E\u3002</p><p>\u5F53\u7136\u4E86\uFF0C\u5C0F\u4F19\u4F34\u4EEC\u9047\u5230\u6587\u7AE0\u4E2D\u6709\u9519\u8BEF\u7684\u5730\u65B9\uFF0C\u4E0D\u8981\u624B\u4E0B\u7559\u60C5\uFF0C\u53EF\u4EE5\u7EC4\u56E2\u8FC7\u6765\u6376\u6211\uFF0C\u4F46\u8981\u4FDD\u8BC1\u4E00\u70B9\uFF0C\u4E0D\u8981\u6253\u8138\uFF0C\u6211\u6015\u6BC1\u5BB9\u3002</p><h3 id="_01\u3001mongodb-\u662F\u4EC0\u4E48" tabindex="-1"><a class="header-anchor" href="#_01\u3001mongodb-\u662F\u4EC0\u4E48" aria-hidden="true">#</a> 01\u3001MongoDB \u662F\u4EC0\u4E48</h3><blockquote><p>MongoDB \u662F\u4E00\u4E2A\u57FA\u4E8E\u5206\u5E03\u5F0F\u7684\u6587\u4EF6\u5B58\u50A8\u6570\u636E\u5E93\uFF0C\u65E8\u5728\u4E3A Web \u5E94\u7528\u63D0\u4F9B\u53EF\u6269\u5C55\u7684\u9AD8\u6027\u80FD\u6570\u636E\u5B58\u50A8\u89E3\u51B3\u65B9\u6848\u3002</p></blockquote><p>\u4EE5\u4E0A\u5F15\u7528\u6765\u81EA\u4E8E\u5B98\u65B9\uFF0C\u4E0D\u5F97\u4E0D\u8BF4\uFF0C\u89E3\u91CA\u5F97\u6587\u7EC9\u7EC9\u7684\u3002\u90A3\u5C31\u8BA9\u6211\u6765\u6362\u4E00\u79CD\u901A\u4FD7\u7684\u8BF4\u6CD5\u7ED9\u5C0F\u4F19\u4F34\u4EEC\u89E3\u91CA\u4E00\u4E0B\uFF0CMongoDB \u5C06\u6570\u636E\u5B58\u50A8\u4E3A\u4E00\u4E2A\u6587\u6863\uFF08\u7C7B\u4F3C\u4E8E JSON \u5BF9\u8C61\uFF09\uFF0C\u6570\u636E\u7ED3\u6784\u7531\u952E\u503C\u5BF9\u7EC4\u6210\uFF0C\u7C7B\u4F3C\u4E8E Java \u4E2D\u7684 Map\uFF0C\u901A\u8FC7 key \u7684\u65B9\u5F0F\u8BBF\u95EE\u8D77\u6765\u6548\u7387\u5C31\u9AD8\u5F97\u591A\uFF0C\u5BF9\u5427\uFF1F\u8FD9\u4E5F\u662F MongoDB \u6700\u91CD\u8981\u7684\u7279\u70B9\u3002</p><p>MongoDB \u63D0\u4F9B\u4E86\u4F01\u4E1A\u7248\uFF08\u529F\u80FD\u66F4\u5F3A\u5927\uFF09\u548C\u793E\u533A\u7248\uFF0C\u5BF9\u4E8E\u6211\u4EEC\u5F00\u53D1\u8005\u6765\u8BF4\uFF0C\u62FF\u793E\u533A\u7248\u6765\u5B66\u4E60\u548C\u4F7F\u7528\u5C31\u8DB3\u591F\u4E86\u3002MongoDB \u7684\u9A71\u52A8\u5305\u5F88\u591A\uFF0C\u5E38\u89C1\u7684\u7F16\u7A0B\u8BED\u8A00\u90FD\u6709\u8986\u76D6\u5230\uFF0C\u6BD4\u5982\u8BF4 Java\u3001JavaScript\u3001C++\u3001C#\u3001Python \u7B49\u7B49\u3002</p><p>\u5F88\u591A\u77E5\u540D\u7684\u4E92\u8054\u7F51\u516C\u53F8\u90FD\u5728\u7528 MongoDB\uFF0C\u6BD4\u5982\u8BF4\u8C37\u6B4C\u3001Facebook\u3001eBay \u7B49\u7B49\u3002\u603B\u4E4B\uFF0C\u503C\u5F97\u4FE1\u8D56\uFF0C\u5C0F\u4F19\u4F34\u4EEC\u653E\u5FC3\u5165\u95E8\uFF0C\u6280\u591A\u4E0D\u538B\u8EAB\u554A\uFF0C\u5C31\u5F53\u662F\u7ED9\u81EA\u5DF1\u4E00\u6B21\u5B66\u4E60\u7684\u673A\u4F1A\u3002</p><h3 id="_02\u3001\u5B89\u88C5-mongodb" tabindex="-1"><a class="header-anchor" href="#_02\u3001\u5B89\u88C5-mongodb" aria-hidden="true">#</a> 02\u3001\u5B89\u88C5 MongoDB</h3><p>MongoDB \u9488\u5BF9\u4E0D\u540C\u7684\u64CD\u4F5C\u7CFB\u7EDF\u6709\u4E0D\u540C\u7684\u5B89\u88C5\u5305\uFF0C\u6211\u4EEC\u8FD9\u7BC7\u5165\u95E8\u7684\u6587\u7AE0\u5C31\u4EE5 Windows \u4E3A\u4F8B\u5427\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mongodb/rumen-557ab648-e2c4-4309-8695-aeb7fbcba25b.jpg" alt=""></p><p>\u5B98\u7F51\u4E0B\u8F7D\u5730\u5740\u5982\u4E0B\uFF1A</p>',12),q={href:"https://www.mongodb.com/download-center/community",target:"_blank",rel:"noopener noreferrer"},_=a("https://www.mongodb.com/download-center/community"),j=o('<p>\u6700\u65B0\u7684\u7248\u672C\u662F 4.2.6\uFF0C\u6211\u9009\u62E9\u7684\u662F\u5B89\u88C5\u7248\uFF0Cmsi \u683C\u5F0F\u7684\uFF0C264M \u5DE6\u53F3\u3002\u4E0B\u8F7D\u5B8C\u5C31\u53EF\u4EE5\u53CC\u51FB\u8FD0\u884C\u5B89\u88C5\uFF0C\u50BB\u74DC\u5F0F\u7684\u3002</p><p>\u5EFA\u8BAE\u9009\u62E9\u300CCustom\u300D\u81EA\u5B9A\u4E49\u5B89\u88C5\uFF0C\u5982\u4E0B\u56FE\u6240\u793A\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mongodb/rumen-42330ff2-598a-40bf-b252-480704c6a531.jpg" alt=""></p><p>\u4EE5\u670D\u52A1\u6A21\u5F0F\u8FD0\u884C\uFF0C\u5E76\u914D\u7F6E\u597D\u6570\u636E\u548C\u65E5\u5FD7\u76EE\u5F55\uFF0C\u5982\u4E0B\u56FE\u6240\u793A\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mongodb/rumen-c71a31d4-5a99-4c12-93a9-348aa79bc086.jpg" alt=""></p><p>\u5EFA\u8BAE\u53D6\u6D88\u52FE\u9009\u5B89\u88C5 MongoDB \u7684\u56FE\u5F62\u5316\u5BA2\u6237\u7AEF\u5DE5\u5177\uFF0C\u5426\u5219\u5B89\u88C5\u901F\u5EA6\u6162\u5230\u4F60\u60F3\u8981\u53BB\u6263\u4F1A\u624B\u673A\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mongodb/rumen-84ea8b51-6b53-4500-86fa-0dcfa61b84cd.jpg" alt=""></p><p>\u5B89\u88C5\u5B8C\u6210\u540E\u8FDB\u5165\u5230 bin \u76EE\u5F55\u4E0B\uFF0C\u53CC\u51FB mongo.exe \u6587\u4EF6\u5C31\u53EF\u4EE5\u8FDE\u63A5\u5230 MongoDB \u670D\u52A1\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mongodb/rumen-bcf34981-0c2b-4f86-94e0-711dfb307371.jpg" alt=""></p><p>1\uFF09MongoDB \u7684\u9ED8\u8BA4\u7AEF\u53E3\u53F7\u4E3A 27017\u3002</p><p>2\uFF09MongoDB \u7684\u7248\u672C\u53F7\u4E3A 4.2.6\u3002</p><p>\u9ED8\u8BA4\u4F1A\u8FDE\u63A5\u5230 test \u6587\u6863\uFF08\u76F8\u5F53\u4E8E\u6570\u636E\uFF09\uFF0C\u53EF\u4EE5\u901A\u8FC7 db \u547D\u4EE4\u67E5\u8BE2\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mongodb/rumen-ded1c30c-9943-4061-8fa3-4562387b72cd.jpg" alt=""></p><p>\u8FD8\u53EF\u4EE5\u8FD0\u884C\u4E00\u4E9B\u7B80\u5355\u7684\u7B97\u672F\u8FD0\u7B97\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mongodb/rumen-22c1d414-6ba4-47dd-beb8-f1003f21083e.jpg" alt=""></p><p>\u90A3\u5982\u4F55\u505C\u6B62\u670D\u52A1\u5462\uFF1F\u53EF\u4EE5\u76F4\u63A5\u70B9\u51FB\u53F3\u4E0A\u89D2\u7684 X \u53F7\u2014\u2014\u7C97\u66B4\u3001\u58C1\u549A\u3002</p><h3 id="_03\u3001\u5B89\u88C5-robo-3t" tabindex="-1"><a class="header-anchor" href="#_03\u3001\u5B89\u88C5-robo-3t" aria-hidden="true">#</a> 03\u3001\u5B89\u88C5 Robo 3T</h3><p>Robo 3T \u63D0\u4F9B\u4E86\u5BF9 MongoDB \u548C SCRAM-SHA-256\uFF08\u5347\u7EA7\u7684 mongo shell\uFF09\u7684\u652F\u6301\uFF0C\u662F\u4E00\u6B3E\u8F7B\u91CF\u7EA7\u7684 MongoDB \u5BA2\u6237\u7AEF\u5DE5\u5177\u3002</p><p>\u4E0B\u8F7D\u5730\u5740\u5982\u4E0B\uFF1A</p>',19),D={href:"https://robomongo.org/download",target:"_blank",rel:"noopener noreferrer"},M=a("https://robomongo.org/download"),B=o(`<p>\u6700\u65B0\u7684\u7248\u672C\u662F 1.3\uFF0C\u9009\u62E9 zip \u683C\u5F0F\u8FDB\u884C\u4E0B\u8F7D\uFF0C23M \u5DE6\u53F3\u3002\u4E0B\u8F7D\u5B8C\u6210\u540E\uFF0C\u89E3\u538B\u5C31\u884C\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mongodb/rumen-b178e02c-23b6-4b54-92ec-3a170a8499d0.jpg" alt=""></p><p>\u5305\u76EE\u5F55\u4E0D\u518D\u4E00\u4E00\u89E3\u91CA\u4E86\uFF0C\u8FDB\u5165 bin \u76EE\u5F55\u4E0B\uFF0C\u53CC\u51FB\u8FD0\u884C robo3t.exe \u6587\u4EF6\uFF0C\u542F\u52A8 Robo 3T \u5BA2\u6237\u7AEF\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mongodb/rumen-99717a12-c90d-4a03-941d-f3857f503d44.jpg" alt=""></p><p>\u70B9\u51FB\u300CCreate\u300D\u521B\u5EFA\u4E00\u4E2A MongoDB \u7684\u8FDE\u63A5\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mongodb/rumen-11866209-6a60-4a6a-9ca9-fcd9279796f6.jpg" alt=""></p><p>\u8FDE\u63A5\u6210\u529F\u540E\uFF0C\u5C31\u53EF\u4EE5\u64CD\u4F5C MongoDB \u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mongodb/rumen-753dfcd7-1557-4837-9a7e-94b2ff9db72a.jpg" alt=""></p><p>\uFF08\u4E0D\u8FC7\uFF0C\u5C0F\u4F19\u4F34\u4EEC\u8FD9\u65F6\u5019\u4E5F\u4E0D\u592A\u77E5\u9053\u8BE5\u600E\u4E48\u64CD\u4F5C\uFF0C\u6BD5\u7ADF MongoDB \u7684\u4E00\u4E9B\u76F8\u5173\u6982\u5FF5\u8FD8\u4E0D\u6E05\u695A\uFF0C\u65E0\u4ECE\u4E0B\u624B\u554A\uFF09</p><h3 id="_04\u3001mongodb-\u7684\u76F8\u5173\u6982\u5FF5" tabindex="-1"><a class="header-anchor" href="#_04\u3001mongodb-\u7684\u76F8\u5173\u6982\u5FF5" aria-hidden="true">#</a> 04\u3001MongoDB \u7684\u76F8\u5173\u6982\u5FF5</h3><p>\u968F\u7740\u4E92\u8054\u7F51\u7684\u6781\u901F\u53D1\u5C55\uFF0C\u7528\u6237\u6570\u636E\u4E5F\u8D8A\u6765\u8D8A\u5E9E\u5927\uFF0CNoSQL \u6570\u636E\u5E93\u7684\u53D1\u5C55\u80FD\u591F\u5F88\u597D\u5730\u5904\u7406\u8FD9\u4E9B\u5927\u7684\u6570\u636E\uFF0CMongoDB \u662F NoSQL \u6570\u636E\u5E93\u4E2D\u7684\u4E00\u4E2A\u5178\u578B\u7684\u4EE3\u8868\u3002</p><p>\u8BF4\u5230\u8FD9\uFF0C\u53EF\u80FD\u6709\u4E9B\u5C0F\u4F19\u4F34\u4EEC\u8FD8\u4E0D\u77E5\u9053 NoSQL \u662F\u5565\u610F\u601D\uFF0C\u6211\u7B80\u5355\u89E3\u91CA\u4E00\u4E0B\u3002NoSQL \u53EF\u4E0D\u662F\u6CA1\u6709 SQL \u7684\u610F\u601D\uFF0C\u5B83\u5B9E\u9645\u7684\u542B\u4E49\u662F Not Only SQL\uFF0C\u4E5F\u5C31\u662F\u201C\u4E0D\u4EC5\u4EC5\u662F SQL\u201D\uFF0C\u6307\u7684\u662F\u975E\u5173\u7CFB\u578B\u6570\u636E\u5E93\uFF0C\u548C\u4F20\u7EDF\u7684\u5173\u7CFB\u578B\u6570\u636E\u5E93 MySQL\u3001Oracle \u4E0D\u540C\u3002</p><p>MongoDB \u547D\u540D\u6E90\u4E8E\u82F1\u6587\u5355\u8BCD hu<strong>mongo</strong>us\uFF0C\u610F\u601D\u662F\u300C\u5DE8\u5927\u65E0\u6BD4\u300D\uFF0C\u53EF\u4EE5\u770B\u5F97\u51FA MongoDB \u7684\u91CE\u5FC3\u3002MongoDB \u7684\u6570\u636E\u4EE5\u7C7B\u4F3C\u4E8E JSON \u683C\u5F0F\u7684\u4E8C\u8FDB\u5236\u6587\u6863\u5B58\u50A8\uFF1A</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>{
     name: &quot;\u6C89\u9ED8\u738B\u4E8C&quot;,
     age: 18,
     hobbies: [&quot;\u5199\u4F5C&quot;, &quot;\u6572\u4EE3\u7801&quot;]
diff --git a/dist/assets/rumen.html.439110fe.js b/dist/assets/rumen.html.ee21a790.js
similarity index 99%
rename from dist/assets/rumen.html.439110fe.js
rename to dist/assets/rumen.html.ee21a790.js
index 988c7c25..6d5b7fea 100644
--- a/dist/assets/rumen.html.439110fe.js
+++ b/dist/assets/rumen.html.ee21a790.js
@@ -1,4 +1,4 @@
-import{_ as c}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o,c as i,a,b as e,d as s,e as t}from"./app.a0271b9c.js";const l={},r=a("h1",{id:"\u5168\u6587\u641C\u7D22\u5F15\u64CEelasticsearch\u5165\u95E8\u6559\u7A0B",tabindex:"-1"},[a("a",{class:"header-anchor",href:"#\u5168\u6587\u641C\u7D22\u5F15\u64CEelasticsearch\u5165\u95E8\u6559\u7A0B","aria-hidden":"true"},"#"),s(" \u5168\u6587\u641C\u7D22\u5F15\u64CEElasticsearch\u5165\u95E8\u6559\u7A0B")],-1),u=s("\u5B66\u4E60\u771F\u7684\u662F\u4E00\u4EF6\u4EE4\u4EBA\u5F00\u5FC3\u7684\u4E8B\u60C5\uFF0C\u4E0A\u6B21\u5206\u4EAB\u4E86 "),d={href:"https://mp.weixin.qq.com/s/NPJkMy5RppyFk9QhzHxhrw",target:"_blank",rel:"noopener noreferrer"},h=s("Redis \u5165\u95E8"),b=s("\u7684\u6587\u7AE0\u540E\uFF0C\u6536\u5230\u4E86\u5F88\u591A\u5C0F\u4F19\u4F34\u7684\u9F13\u52B1\uFF0C\u6BD4\u5982\u8BF4\uFF1A\u201C\u54CE\u5440\uFF0C\u4E0D\u9519\u5440\uFF0C\u4E8C\u54E5\uFF0C\u901A\u4FD7\u6613\u61C2\uFF0C\u5341\u5206\u949F\u771F\u7684\u5165\u95E8\u4E86\u201D\u3002\u7785\u7785\uFF0C\u7785\u7785\uFF0C\u6211\u51B3\u5B9A\u518D\u63A5\u518D\u5389\uFF0C\u5165\u95E8\u4E00\u4E0B Elasticsearch\uFF0C\u56E0\u4E3A\u6211\u4EEC\u516C\u53F8\u7684\u5546\u57CE\u7CFB\u7EDF\u5347\u7EA7\u4E86\uFF0C\u9700\u8981\u7528 Elasticsearch \u505A\u5546\u54C1\u7684\u641C\u7D22\u3002"),k=t('<p>\u4E0D\u8FC7\uFF0C\u6211\u9996\u5148\u8981\u58F0\u660E\u4E00\u70B9\uFF0C\u6211\u5BF9 Elasticsearch \u5E76\u6CA1\u6709\u8FDB\u884C\u5F88\u6DF1\u5165\u7684\u7814\u7A76\uFF0C\u4EC5\u4EC5\u662F\u56E0\u4E3A\u8981\u7528\uFF0C\u5C31\u5B66\u4E00\u4E0B\u3002\u4F46\u4F5C\u4E3A\u4E00\u540D\u8D1F\u8D23\u4EFB\u7684\u6280\u672F\u535A\u4E3B\uFF0C\u6211\u662F\u7528\u5FC3\u7684\uFF0C\u4E3A\u6B64\u8FD8\u7279\u610F\u5728\u67D0\u67D0\u65F6\u95F4\u4E0A\u4E70\u4E86\u4E00\u95E8\u89C6\u9891\u8BFE\u7A0B\uFF0C\u4F5C\u8005\u53EB\u962E\u4E00\u9E23\u3002\u8BF4\u5B9E\u8BDD\uFF0C\u4ED6\u5149\u79C3\u79C3\u7684\u5934\u9876\u8BA9\u6211\u5BF9\u8FD9\u95E8\u8BFE\u7A0B\u4EA7\u751F\u4E86\u6D53\u539A\u7684\u5174\u8DA3\u3002</p><p>\u7ECF\u8FC7\u4E09\u5929\u4E09\u591C\u7684\u5B66\u4E60\uFF0C\u603B\u7B97\u662F\u5165\u4E86 Elasticsearch \u7684\u95E8\uFF0C\u6211\u5C31\u51B3\u5B9A\u628A\u8FD9\u4E9B\u5FC3\u5F97\u4F53\u4F1A\u5206\u4EAB\u51FA\u6765\uFF0C\u611F\u5174\u8DA3\u7684\u5C0F\u4F19\u4F34\u53EF\u4EE5\u4F5C\u4E3A\u53C2\u8003\u3002\u9047\u5230\u6587\u7AE0\u4E2D\u6709\u9519\u8BEF\u7684\u5730\u65B9\uFF0C\u4E0D\u8981\u624B\u4E0B\u7559\u60C5\uFF0C\u8FC7\u6765\u6376\u6211\uFF0C\u53EA\u8981\u4E0D\u6253\u8138\u5C31\u597D\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/elasticsearch/rumen-ebb2bdbc-2cdb-4540-b48f-41f92c848f2f.jpg" alt=""></p><h3 id="_01\u3001elasticsearch-\u662F\u4EC0\u4E48" tabindex="-1"><a class="header-anchor" href="#_01\u3001elasticsearch-\u662F\u4EC0\u4E48" aria-hidden="true">#</a> 01\u3001Elasticsearch \u662F\u4EC0\u4E48</h3><blockquote><p>Elasticsearch \u662F\u4E00\u4E2A\u5206\u5E03\u5F0F\u3001RESTful \u98CE\u683C\u7684\u641C\u7D22\u548C\u6570\u636E\u5206\u6790\u5F15\u64CE\uFF0C\u80FD\u591F\u89E3\u51B3\u4E0D\u65AD\u6D8C\u73B0\u51FA\u7684\u5404\u79CD\u7528\u4F8B\u3002 \u4F5C\u4E3A Elastic Stack \u7684\u6838\u5FC3\uFF0C\u5B83\u96C6\u4E2D\u5B58\u50A8\u60A8\u7684\u6570\u636E\uFF0C\u5E2E\u52A9\u60A8\u53D1\u73B0\u610F\u6599\u4E4B\u4E2D\u4EE5\u53CA\u610F\u6599\u4E4B\u5916\u7684\u60C5\u51B5\u3002</p></blockquote><p>\u4EE5\u4E0A\u5F15\u7528\u6765\u81EA\u4E8E\u5B98\u65B9\uFF0C\u4E0D\u5F97\u4E0D\u8BF4\uFF0C\u89E3\u91CA\u5F97\u86EE\u6587\u827A\u7684\u3002\u610F\u6599\u4E4B\u4E2D\u548C\u610F\u6599\u4E4B\u5916\uFF0C\u8FD9\u4E24\u4E2A\u8BCD\u8BA9\u6211\u60F3\u8D77\u6765\u4E86\u67D0\u4E00\u5E74\u7684\u9AD8\u8003\u4F5C\u6587\u9898\uFF08\u60C5\u7406\u4E4B\u4E2D\u548C\u610F\u6599\u4E4B\u5916\uFF09\u3002</p><p>Elastic Stack \u53C8\u662F\u4EC0\u4E48\u5462\uFF1F\u6574\u4E2A\u67B6\u6784\u56FE\u5982\u4E0B\u56FE\uFF08\u6765\u6E90\u4E8E\u7F51\u7EDC\uFF0C\u4FB5\u5220\uFF09\u6240\u793A\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/elasticsearch/rumen-04b04318-25c9-4eb5-895e-9c608a4b26f9.jpg" alt=""></p><p>\u4FE1\u606F\u91CF\u6BD4\u8F83\u591A\uFF0C\u5BF9\u5427\uFF1F\u90A3\u5C31\u8BB0\u4F4F\u4E00\u53E5\u8BDD\u5427\uFF0CElasticsearch \u662F Elastic Stack \u7684\u6838\u5FC3\u3002</p><p>\u56FD\u5185\u5916\u7684\u5F88\u591A\u77E5\u540D\u516C\u53F8\u90FD\u5728\u7528 Elasticsearch\uFF0C\u6BD4\u5982\u8BF4\u6EF4\u6EF4\u3001\u4ECA\u65E5\u5934\u6761\u3001\u8C37\u6B4C\u3001\u5FAE\u8F6F\u7B49\u7B49\u3002Elasticsearch \u6709\u5F88\u591A\u5F3A\u5927\u7684\u529F\u80FD\uFF0C\u6BD4\u5982\u8BF4\u5168\u6587\u641C\u7D22\u3001\u8D2D\u7269\u63A8\u8350\u3001\u9644\u8FD1\u5B9A\u4F4D\u63A8\u8350\u7B49\u7B49\u3002</p><p>\u7406\u8BBA\u65B9\u9762\u7684\u5185\u5BB9\u5C31\u4E0D\u8BF4\u592A\u591A\u4E86\uFF0C\u6211\u6015\u5C0F\u4F19\u4F34\u4EEC\u4F1A\u611F\u5230\u67AF\u71E5\u3002\u6BD5\u7ADF\u5165\u95E8\u561B\uFF0C\u5B9E\u6218\u624D\u91CD\u8981\u3002</p><h3 id="_02\u3001\u5B89\u88C5-elasticsearch" tabindex="-1"><a class="header-anchor" href="#_02\u3001\u5B89\u88C5-elasticsearch" aria-hidden="true">#</a> 02\u3001\u5B89\u88C5 Elasticsearch</h3><p>Elasticsearch \u662F\u7531 Java \u5F00\u53D1\u7684\uFF0C\u6240\u4EE5\u65E9\u671F\u7684\u7248\u672C\u9700\u8981\u5148\u5728\u7535\u8111\u4E0A\u5B89\u88C5 JDK \u8FDB\u884C\u652F\u6301\u3002\u540E\u6765\u7684\u7248\u672C\u4E2D\u5185\u7F6E\u4E86 Java \u73AF\u5883\uFF0C\u6240\u4EE5\u76F4\u63A5\u4E0B\u8F7D\u5C31\u884C\u4E86\u3002Elasticsearch \u9488\u5BF9\u4E0D\u540C\u7684\u64CD\u4F5C\u7CFB\u7EDF\u6709\u4E0D\u540C\u7684\u5B89\u88C5\u5305\uFF0C\u6211\u4EEC\u8FD9\u7BC7\u5165\u95E8\u7684\u6587\u7AE0\u5C31\u4EE5 Windows \u4E3A\u4F8B\u5427\u3002</p><p>\u4E0B\u8F7D\u5730\u5740\u5982\u4E0B\uFF1A</p>',14),m={href:"https://www.elastic.co/cn/downloads/elasticsearch",target:"_blank",rel:"noopener noreferrer"},v=s("https://www.elastic.co/cn/downloads/elasticsearch"),g=t('<p>\u6700\u65B0\u7684\u7248\u672C\u662F 7.6.2\uFF0C280M \u5DE6\u53F3\u3002\u4F46\u6211\u786C\u751F\u751F\u82B1\u4E86 10 \u5206\u949F\u7684\u65F6\u95F4\u624D\u4E0B\u8F7D\u5B8C\u6BD5\uFF0C\u4E0D\u77E5\u9053\u662F\u4E0D\u662F\u8FDE\u901A\u7684 200M \u5E26\u5BBD\u4E0D\u7ED9\u529B\uFF0C\u8FD8\u662F\u5B98\u7F51\u672C\u8EAB\u4E0B\u8F7D\u7684\u901F\u5EA6\u5C31\u6162\uFF0C\u53CD\u6B63\u6211\u53BB\u6D17\u4E86 6 \u9897\u8461\u8404\u5403\u5B8C\u540E\u8FD8\u6CA1\u4E0B\u8F7D\u5B8C\u3002</p><p>Elasticsearch \u662F\u514D\u5B89\u88C5\u7684\uFF0C\u53EA\u9700\u8981\u628A zip \u5305\u89E3\u538B\u5C31\u53EF\u4EE5\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/elasticsearch/rumen-07da0521-74eb-4a90-b17f-59258e622609.jpg" alt=""></p><p>1\uFF09bin \u76EE\u5F55\u4E0B\u662F\u4E00\u4E9B\u811A\u672C\u6587\u4EF6\uFF0C\u5305\u62EC Elasticsearch \u7684\u542F\u52A8\u6267\u884C\u6587\u4EF6\u3002</p><p>2\uFF09config \u76EE\u5F55\u4E0B\u662F\u4E00\u4E9B\u914D\u7F6E\u6587\u4EF6\u3002</p><p>3\uFF09jdk \u76EE\u5F55\u4E0B\u662F\u5185\u7F6E\u7684 Java \u8FD0\u884C\u73AF\u5883\u3002</p><p>4\uFF09lib \u76EE\u5F55\u4E0B\u662F\u4E00\u4E9B Java \u7C7B\u5E93\u6587\u4EF6\u3002</p><p>5\uFF09logs \u76EE\u5F55\u4E0B\u4F1A\u751F\u6210\u4E00\u4E9B\u65E5\u5FD7\u6587\u4EF6\u3002</p><p>6\uFF09modules \u76EE\u5F55\u4E0B\u662F\u4E00\u4E9B Elasticsearch \u7684\u6A21\u5757\u3002</p><p>7\uFF09plugins \u76EE\u5F55\u4E0B\u53EF\u4EE5\u653E\u4E00\u4E9B Elasticsearch \u7684\u63D2\u4EF6\u3002</p><p>\u76F4\u63A5\u53CC\u51FB bin \u76EE\u5F55\u4E0B\u7684 elasticsearch.bat \u6587\u4EF6\u5C31\u53EF\u4EE5\u542F\u52A8 Elasticsearch \u670D\u52A1\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/elasticsearch/rumen-7dd19afd-1aeb-49b6-a07c-f11e139fe3d3.jpg" alt=""></p><p>\u8F93\u51FA\u7684\u65E5\u5FD7\u4FE1\u606F\u6709\u70B9\u591A\uFF0C\u4E0D\u7528\u7EC6\u770B\uFF0C\u6CE8\u610F\u770B\u5230\u6709\u201Cstarted\u201D\u7684\u5B57\u6837\u5C31\u8868\u660E\u542F\u52A8\u6210\u529F\u4E86\u3002\u4E3A\u4E86\u8FDB\u4E00\u6B65\u786E\u8BA4 Elasticsearch \u6709\u6CA1\u6709\u542F\u52A8\u6210\u529F\uFF0C\u53EF\u4EE5\u5728\u6D4F\u89C8\u5668\u7684\u5730\u5740\u680F\u91CC\u8F93\u5165 <code>http://localhost:9200</code> \u8FDB\u884C\u67E5\u770B\uFF089200 \u662F Elasticsearch \u7684\u9ED8\u8BA4\u7AEF\u53E3\u53F7\uFF09\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/elasticsearch/rumen-51f269c2-7482-494a-8a04-6585f20176a7.jpg" alt=""></p><p>\u4F60\u770B\uFF0C\u4E3A\u4E86 Search\u3002</p><p>\u90A3\u5982\u4F55\u505C\u6B62\u670D\u52A1\u5462\uFF1F\u53EF\u4EE5\u76F4\u63A5\u6309\u4E0B <code>Ctrl+C</code> \u7EC4\u5408\u952E\u2014\u2014\u7C97\u66B4\u3001\u58C1\u549A\u3002</p><h3 id="_03\u3001\u5B89\u88C5-kibana" tabindex="-1"><a class="header-anchor" href="#_03\u3001\u5B89\u88C5-kibana" aria-hidden="true">#</a> 03\u3001\u5B89\u88C5 Kibana</h3><p>\u901A\u8FC7 Kibana\uFF0C\u6211\u4EEC\u53EF\u4EE5\u5BF9 Elasticsearch \u670D\u52A1\u8FDB\u884C\u53EF\u89C6\u5316\u64CD\u4F5C\uFF0C\u5C31\u50CF\u5728 Linux \u64CD\u4F5C\u7CFB\u7EDF\u4E0B\u5B89\u88C5\u4E00\u4E2A\u56FE\u5F62\u5316\u754C\u9762\u4E00\u6837\u3002</p><p>\u4E0B\u8F7D\u5730\u5740\u5982\u4E0B\uFF1A</p>',19),f={href:"https://www.elastic.co/cn/downloads/kibana",target:"_blank",rel:"noopener noreferrer"},E=s("https://www.elastic.co/cn/downloads/kibana"),_=t(`<p>\u6700\u65B0\u7684\u7248\u672C\u662F 7.6.2\uFF0C284M \u5DE6\u53F3\uFF0C\u4F53\u79EF\u548C Elasticsearch \u5DEE\u4E0D\u591A\u3002\u9009\u62E9\u4E0B\u8F7D Windows \u7248\uFF0Czip \u683C\u5F0F\u7684\uFF0C\u5B8C\u6210\u540E\u76F4\u63A5\u89E3\u538B\u5C31\u884C\u4E86\u3002\u4E0B\u8F7D\u7684\u8FC7\u7A0B\u4E2D\u53C8\u53BB\u6D17\u4E86 6 \u9897\u8461\u8404\u5403\uFF0C\u72D7\u5934\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/elasticsearch/rumen-12372ee6-acc0-4425-964b-ca32886f17ce.jpg" alt=""></p><p>\u5305\u76EE\u5F55\u4E0D\u518D\u4E00\u4E00\u89E3\u91CA\u4E86\uFF0C\u8FDB\u5165 bin \u76EE\u5F55\u4E0B\uFF0C\u53CC\u51FB\u8FD0\u884C kibana.bat \u6587\u4EF6\uFF0C\u542F\u52A8 Kibana \u670D\u52A1\u3002\u6574\u4E2A\u8FC7\u7A0B\u6BD4 Elasticsearch \u8981\u6162\u4E00\u4E9B\uFF0C\u5F53\u770B\u5230 <code>[Kibana][http] http server running</code> \u7684\u4FE1\u606F\u540E\uFF0C\u8BF4\u660E\u670D\u52A1\u542F\u52A8\u6210\u529F\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/elasticsearch/rumen-784d70ef-b6e7-4312-85f1-36ace9b2a5bd.jpg" alt=""></p><p>\u5728\u6D4F\u89C8\u5668\u5730\u5740\u680F\u8F93\u5165 <code>http://localhost:5601</code> \u67E5\u770B Kibana \u7684\u56FE\u5F62\u5316\u754C\u9762\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/elasticsearch/rumen-e6f64545-a925-4bb4-a25e-44129832fb4e.jpg" alt=""></p><p>\u7531\u4E8E\u5F53\u524D\u7684 Elasticsearch \u670D\u52A1\u7AEF\u4E2D\u8FD8\u6CA1\u6709\u4EFB\u4F55\u6570\u636E\uFF0C\u6240\u4EE5\u6211\u4EEC\u53EF\u4EE5\u9009\u62E9\u300CTry Our Sample Data\u300D\u5BFC\u5165 Kibana \u63D0\u4F9B\u7684\u6A21\u62DF\u6570\u636E\u4F53\u9A8C\u4E00\u4E0B\u3002\u4E0B\u56FE\u662F\u5BFC\u5165\u7535\u5546\u6570\u636E\u5E93\u7684\u770B\u677F\u9875\u9762\uFF0C\u662F\u4E0D\u662F\u5F88\u4E30\u5BCC\uFF1F</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/elasticsearch/rumen-a16d99ff-272d-43bb-aa94-23b240cc464b.jpg" alt=""></p><p>\u6253\u5F00 Dev Tools \u9762\u677F\uFF0C\u53EF\u4EE5\u770B\u5230\u4E00\u4E2A\u7B80\u5355\u7684 DSL \u67E5\u8BE2\u8BED\u53E5\uFF08\u4E00\u79CD\u5B8C\u5168\u57FA\u4E8E JSON \u7684\u7279\u5B9A\u4E8E\u9886\u57DF\u7684\u8BED\u8A00\uFF09\uFF0C\u70B9\u51FB\u300C\u8FD0\u884C\u300D\u6309\u94AE\u540E\u5C31\u53EF\u4EE5\u770B\u5230 JSON \u683C\u5F0F\u7684\u6570\u636E\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/elasticsearch/rumen-5c44bd79-d3a9-49fb-9414-04dc38840cfb.jpg" alt=""></p><h3 id="_04\u3001elasticsearch-\u7684\u5173\u952E\u6982\u5FF5" tabindex="-1"><a class="header-anchor" href="#_04\u3001elasticsearch-\u7684\u5173\u952E\u6982\u5FF5" aria-hidden="true">#</a> 04\u3001Elasticsearch \u7684\u5173\u952E\u6982\u5FF5</h3><p>\u5728\u8FDB\u884C\u4E0B\u4E00\u6B65\u4E4B\u524D\uFF0C\u9700\u8981\u5148\u6765\u7406\u89E3 Elasticsearch \u4E2D\u7684\u51E0\u4E2A\u5173\u952E\u6982\u5FF5\uFF0C\u6BD4\u5982\u8BF4\u4EC0\u4E48\u662F\u7D22\u5F15\uFF0C\u4EC0\u4E48\u662F\u7C7B\u578B\uFF0C\u4EC0\u4E48\u662F\u6587\u6863\u7B49\u7B49\u3002Elasticsearch \u65E2\u7136\u662F\u4E00\u4E2A\u6570\u636E\u5F15\u64CE\uFF0C\u5B83\u91CC\u9762\u7684\u4E00\u4E9B\u6982\u5FF5\u5C31\u548C MySQL \u6709\u4E00\u5B9A\u7684\u5173\u7CFB\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/elasticsearch/rumen-ad2b2f8c-5a19-4c5e-9bc7-cf7ba17830bf.jpg" alt=""></p><p>\u770B\u5B8C\u4E0A\u9762\u8FD9\u5E45\u56FE\uFF08\u6765\u6E90\u4E8E\u7F51\u7EDC\uFF0C\u4FB5\u5220\uFF09\uFF0C\u662F\u4E0D\u662F\u77AC\u95F4\u5C31\u6E05\u6670\u4E86\u3002\u5411 Elasticsearch \u4E2D\u5B58\u50A8\u6570\u636E\uFF0C\u5176\u5B9E\u5C31\u662F\u5411 Elasticsearch \u4E2D\u7684 index \u4E0B\u9762\u7684 type \u4E2D\u5B58\u50A8 JSON \u7C7B\u578B\u7684\u6570\u636E\u3002</p><h3 id="_05\u3001\u5728-java-\u4E2D\u4F7F\u7528-elasticsearch" tabindex="-1"><a class="header-anchor" href="#_05\u3001\u5728-java-\u4E2D\u4F7F\u7528-elasticsearch" aria-hidden="true">#</a> 05\u3001\u5728 Java \u4E2D\u4F7F\u7528 Elasticsearch</h3><p>\u6709\u4E9B\u5C0F\u4F19\u4F34\u53EF\u80FD\u4F1A\u95EE\uFF0C\u201C\u4E8C\u54E5\uFF0C\u6211\u662F\u4E00\u540D Java \u7A0B\u5E8F\u5458\uFF0C\u6211\u8BE5\u5982\u4F55\u5728 Java \u4E2D\u4F7F\u7528 Elasticsearch \u5462\uFF1F\u201D\u8FD9\u4E2A\u95EE\u9898\u95EE\u5F97\u597D\uFF0C\u8FD9\u5C31\u6765\uFF0C\u8FD9\u5C31\u6765\u3002</p><p>Elasticsearch \u65E2\u7136\u5185\u7F6E\u4E86 Java \u8FD0\u884C\u73AF\u5883\uFF0C\u81EA\u7136\u5C31\u63D0\u4F9B\u4E86\u4E00\u7CFB\u5217 API \u4F9B\u6211\u4EEC\u64CD\u4F5C\u3002</p><p>\u7B2C\u4E00\u6B65\uFF0C\u5728\u9879\u76EE\u4E2D\u6DFB\u52A0 Elasticsearch \u5BA2\u6237\u7AEF\u4F9D\u8D56\uFF1A</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
+import{_ as c}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o,c as i,a,b as e,d as s,e as t}from"./app.615e41d8.js";const l={},r=a("h1",{id:"\u5168\u6587\u641C\u7D22\u5F15\u64CEelasticsearch\u5165\u95E8\u6559\u7A0B",tabindex:"-1"},[a("a",{class:"header-anchor",href:"#\u5168\u6587\u641C\u7D22\u5F15\u64CEelasticsearch\u5165\u95E8\u6559\u7A0B","aria-hidden":"true"},"#"),s(" \u5168\u6587\u641C\u7D22\u5F15\u64CEElasticsearch\u5165\u95E8\u6559\u7A0B")],-1),u=s("\u5B66\u4E60\u771F\u7684\u662F\u4E00\u4EF6\u4EE4\u4EBA\u5F00\u5FC3\u7684\u4E8B\u60C5\uFF0C\u4E0A\u6B21\u5206\u4EAB\u4E86 "),d={href:"https://mp.weixin.qq.com/s/NPJkMy5RppyFk9QhzHxhrw",target:"_blank",rel:"noopener noreferrer"},h=s("Redis \u5165\u95E8"),b=s("\u7684\u6587\u7AE0\u540E\uFF0C\u6536\u5230\u4E86\u5F88\u591A\u5C0F\u4F19\u4F34\u7684\u9F13\u52B1\uFF0C\u6BD4\u5982\u8BF4\uFF1A\u201C\u54CE\u5440\uFF0C\u4E0D\u9519\u5440\uFF0C\u4E8C\u54E5\uFF0C\u901A\u4FD7\u6613\u61C2\uFF0C\u5341\u5206\u949F\u771F\u7684\u5165\u95E8\u4E86\u201D\u3002\u7785\u7785\uFF0C\u7785\u7785\uFF0C\u6211\u51B3\u5B9A\u518D\u63A5\u518D\u5389\uFF0C\u5165\u95E8\u4E00\u4E0B Elasticsearch\uFF0C\u56E0\u4E3A\u6211\u4EEC\u516C\u53F8\u7684\u5546\u57CE\u7CFB\u7EDF\u5347\u7EA7\u4E86\uFF0C\u9700\u8981\u7528 Elasticsearch \u505A\u5546\u54C1\u7684\u641C\u7D22\u3002"),k=t('<p>\u4E0D\u8FC7\uFF0C\u6211\u9996\u5148\u8981\u58F0\u660E\u4E00\u70B9\uFF0C\u6211\u5BF9 Elasticsearch \u5E76\u6CA1\u6709\u8FDB\u884C\u5F88\u6DF1\u5165\u7684\u7814\u7A76\uFF0C\u4EC5\u4EC5\u662F\u56E0\u4E3A\u8981\u7528\uFF0C\u5C31\u5B66\u4E00\u4E0B\u3002\u4F46\u4F5C\u4E3A\u4E00\u540D\u8D1F\u8D23\u4EFB\u7684\u6280\u672F\u535A\u4E3B\uFF0C\u6211\u662F\u7528\u5FC3\u7684\uFF0C\u4E3A\u6B64\u8FD8\u7279\u610F\u5728\u67D0\u67D0\u65F6\u95F4\u4E0A\u4E70\u4E86\u4E00\u95E8\u89C6\u9891\u8BFE\u7A0B\uFF0C\u4F5C\u8005\u53EB\u962E\u4E00\u9E23\u3002\u8BF4\u5B9E\u8BDD\uFF0C\u4ED6\u5149\u79C3\u79C3\u7684\u5934\u9876\u8BA9\u6211\u5BF9\u8FD9\u95E8\u8BFE\u7A0B\u4EA7\u751F\u4E86\u6D53\u539A\u7684\u5174\u8DA3\u3002</p><p>\u7ECF\u8FC7\u4E09\u5929\u4E09\u591C\u7684\u5B66\u4E60\uFF0C\u603B\u7B97\u662F\u5165\u4E86 Elasticsearch \u7684\u95E8\uFF0C\u6211\u5C31\u51B3\u5B9A\u628A\u8FD9\u4E9B\u5FC3\u5F97\u4F53\u4F1A\u5206\u4EAB\u51FA\u6765\uFF0C\u611F\u5174\u8DA3\u7684\u5C0F\u4F19\u4F34\u53EF\u4EE5\u4F5C\u4E3A\u53C2\u8003\u3002\u9047\u5230\u6587\u7AE0\u4E2D\u6709\u9519\u8BEF\u7684\u5730\u65B9\uFF0C\u4E0D\u8981\u624B\u4E0B\u7559\u60C5\uFF0C\u8FC7\u6765\u6376\u6211\uFF0C\u53EA\u8981\u4E0D\u6253\u8138\u5C31\u597D\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/elasticsearch/rumen-ebb2bdbc-2cdb-4540-b48f-41f92c848f2f.jpg" alt=""></p><h3 id="_01\u3001elasticsearch-\u662F\u4EC0\u4E48" tabindex="-1"><a class="header-anchor" href="#_01\u3001elasticsearch-\u662F\u4EC0\u4E48" aria-hidden="true">#</a> 01\u3001Elasticsearch \u662F\u4EC0\u4E48</h3><blockquote><p>Elasticsearch \u662F\u4E00\u4E2A\u5206\u5E03\u5F0F\u3001RESTful \u98CE\u683C\u7684\u641C\u7D22\u548C\u6570\u636E\u5206\u6790\u5F15\u64CE\uFF0C\u80FD\u591F\u89E3\u51B3\u4E0D\u65AD\u6D8C\u73B0\u51FA\u7684\u5404\u79CD\u7528\u4F8B\u3002 \u4F5C\u4E3A Elastic Stack \u7684\u6838\u5FC3\uFF0C\u5B83\u96C6\u4E2D\u5B58\u50A8\u60A8\u7684\u6570\u636E\uFF0C\u5E2E\u52A9\u60A8\u53D1\u73B0\u610F\u6599\u4E4B\u4E2D\u4EE5\u53CA\u610F\u6599\u4E4B\u5916\u7684\u60C5\u51B5\u3002</p></blockquote><p>\u4EE5\u4E0A\u5F15\u7528\u6765\u81EA\u4E8E\u5B98\u65B9\uFF0C\u4E0D\u5F97\u4E0D\u8BF4\uFF0C\u89E3\u91CA\u5F97\u86EE\u6587\u827A\u7684\u3002\u610F\u6599\u4E4B\u4E2D\u548C\u610F\u6599\u4E4B\u5916\uFF0C\u8FD9\u4E24\u4E2A\u8BCD\u8BA9\u6211\u60F3\u8D77\u6765\u4E86\u67D0\u4E00\u5E74\u7684\u9AD8\u8003\u4F5C\u6587\u9898\uFF08\u60C5\u7406\u4E4B\u4E2D\u548C\u610F\u6599\u4E4B\u5916\uFF09\u3002</p><p>Elastic Stack \u53C8\u662F\u4EC0\u4E48\u5462\uFF1F\u6574\u4E2A\u67B6\u6784\u56FE\u5982\u4E0B\u56FE\uFF08\u6765\u6E90\u4E8E\u7F51\u7EDC\uFF0C\u4FB5\u5220\uFF09\u6240\u793A\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/elasticsearch/rumen-04b04318-25c9-4eb5-895e-9c608a4b26f9.jpg" alt=""></p><p>\u4FE1\u606F\u91CF\u6BD4\u8F83\u591A\uFF0C\u5BF9\u5427\uFF1F\u90A3\u5C31\u8BB0\u4F4F\u4E00\u53E5\u8BDD\u5427\uFF0CElasticsearch \u662F Elastic Stack \u7684\u6838\u5FC3\u3002</p><p>\u56FD\u5185\u5916\u7684\u5F88\u591A\u77E5\u540D\u516C\u53F8\u90FD\u5728\u7528 Elasticsearch\uFF0C\u6BD4\u5982\u8BF4\u6EF4\u6EF4\u3001\u4ECA\u65E5\u5934\u6761\u3001\u8C37\u6B4C\u3001\u5FAE\u8F6F\u7B49\u7B49\u3002Elasticsearch \u6709\u5F88\u591A\u5F3A\u5927\u7684\u529F\u80FD\uFF0C\u6BD4\u5982\u8BF4\u5168\u6587\u641C\u7D22\u3001\u8D2D\u7269\u63A8\u8350\u3001\u9644\u8FD1\u5B9A\u4F4D\u63A8\u8350\u7B49\u7B49\u3002</p><p>\u7406\u8BBA\u65B9\u9762\u7684\u5185\u5BB9\u5C31\u4E0D\u8BF4\u592A\u591A\u4E86\uFF0C\u6211\u6015\u5C0F\u4F19\u4F34\u4EEC\u4F1A\u611F\u5230\u67AF\u71E5\u3002\u6BD5\u7ADF\u5165\u95E8\u561B\uFF0C\u5B9E\u6218\u624D\u91CD\u8981\u3002</p><h3 id="_02\u3001\u5B89\u88C5-elasticsearch" tabindex="-1"><a class="header-anchor" href="#_02\u3001\u5B89\u88C5-elasticsearch" aria-hidden="true">#</a> 02\u3001\u5B89\u88C5 Elasticsearch</h3><p>Elasticsearch \u662F\u7531 Java \u5F00\u53D1\u7684\uFF0C\u6240\u4EE5\u65E9\u671F\u7684\u7248\u672C\u9700\u8981\u5148\u5728\u7535\u8111\u4E0A\u5B89\u88C5 JDK \u8FDB\u884C\u652F\u6301\u3002\u540E\u6765\u7684\u7248\u672C\u4E2D\u5185\u7F6E\u4E86 Java \u73AF\u5883\uFF0C\u6240\u4EE5\u76F4\u63A5\u4E0B\u8F7D\u5C31\u884C\u4E86\u3002Elasticsearch \u9488\u5BF9\u4E0D\u540C\u7684\u64CD\u4F5C\u7CFB\u7EDF\u6709\u4E0D\u540C\u7684\u5B89\u88C5\u5305\uFF0C\u6211\u4EEC\u8FD9\u7BC7\u5165\u95E8\u7684\u6587\u7AE0\u5C31\u4EE5 Windows \u4E3A\u4F8B\u5427\u3002</p><p>\u4E0B\u8F7D\u5730\u5740\u5982\u4E0B\uFF1A</p>',14),m={href:"https://www.elastic.co/cn/downloads/elasticsearch",target:"_blank",rel:"noopener noreferrer"},v=s("https://www.elastic.co/cn/downloads/elasticsearch"),g=t('<p>\u6700\u65B0\u7684\u7248\u672C\u662F 7.6.2\uFF0C280M \u5DE6\u53F3\u3002\u4F46\u6211\u786C\u751F\u751F\u82B1\u4E86 10 \u5206\u949F\u7684\u65F6\u95F4\u624D\u4E0B\u8F7D\u5B8C\u6BD5\uFF0C\u4E0D\u77E5\u9053\u662F\u4E0D\u662F\u8FDE\u901A\u7684 200M \u5E26\u5BBD\u4E0D\u7ED9\u529B\uFF0C\u8FD8\u662F\u5B98\u7F51\u672C\u8EAB\u4E0B\u8F7D\u7684\u901F\u5EA6\u5C31\u6162\uFF0C\u53CD\u6B63\u6211\u53BB\u6D17\u4E86 6 \u9897\u8461\u8404\u5403\u5B8C\u540E\u8FD8\u6CA1\u4E0B\u8F7D\u5B8C\u3002</p><p>Elasticsearch \u662F\u514D\u5B89\u88C5\u7684\uFF0C\u53EA\u9700\u8981\u628A zip \u5305\u89E3\u538B\u5C31\u53EF\u4EE5\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/elasticsearch/rumen-07da0521-74eb-4a90-b17f-59258e622609.jpg" alt=""></p><p>1\uFF09bin \u76EE\u5F55\u4E0B\u662F\u4E00\u4E9B\u811A\u672C\u6587\u4EF6\uFF0C\u5305\u62EC Elasticsearch \u7684\u542F\u52A8\u6267\u884C\u6587\u4EF6\u3002</p><p>2\uFF09config \u76EE\u5F55\u4E0B\u662F\u4E00\u4E9B\u914D\u7F6E\u6587\u4EF6\u3002</p><p>3\uFF09jdk \u76EE\u5F55\u4E0B\u662F\u5185\u7F6E\u7684 Java \u8FD0\u884C\u73AF\u5883\u3002</p><p>4\uFF09lib \u76EE\u5F55\u4E0B\u662F\u4E00\u4E9B Java \u7C7B\u5E93\u6587\u4EF6\u3002</p><p>5\uFF09logs \u76EE\u5F55\u4E0B\u4F1A\u751F\u6210\u4E00\u4E9B\u65E5\u5FD7\u6587\u4EF6\u3002</p><p>6\uFF09modules \u76EE\u5F55\u4E0B\u662F\u4E00\u4E9B Elasticsearch \u7684\u6A21\u5757\u3002</p><p>7\uFF09plugins \u76EE\u5F55\u4E0B\u53EF\u4EE5\u653E\u4E00\u4E9B Elasticsearch \u7684\u63D2\u4EF6\u3002</p><p>\u76F4\u63A5\u53CC\u51FB bin \u76EE\u5F55\u4E0B\u7684 elasticsearch.bat \u6587\u4EF6\u5C31\u53EF\u4EE5\u542F\u52A8 Elasticsearch \u670D\u52A1\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/elasticsearch/rumen-7dd19afd-1aeb-49b6-a07c-f11e139fe3d3.jpg" alt=""></p><p>\u8F93\u51FA\u7684\u65E5\u5FD7\u4FE1\u606F\u6709\u70B9\u591A\uFF0C\u4E0D\u7528\u7EC6\u770B\uFF0C\u6CE8\u610F\u770B\u5230\u6709\u201Cstarted\u201D\u7684\u5B57\u6837\u5C31\u8868\u660E\u542F\u52A8\u6210\u529F\u4E86\u3002\u4E3A\u4E86\u8FDB\u4E00\u6B65\u786E\u8BA4 Elasticsearch \u6709\u6CA1\u6709\u542F\u52A8\u6210\u529F\uFF0C\u53EF\u4EE5\u5728\u6D4F\u89C8\u5668\u7684\u5730\u5740\u680F\u91CC\u8F93\u5165 <code>http://localhost:9200</code> \u8FDB\u884C\u67E5\u770B\uFF089200 \u662F Elasticsearch \u7684\u9ED8\u8BA4\u7AEF\u53E3\u53F7\uFF09\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/elasticsearch/rumen-51f269c2-7482-494a-8a04-6585f20176a7.jpg" alt=""></p><p>\u4F60\u770B\uFF0C\u4E3A\u4E86 Search\u3002</p><p>\u90A3\u5982\u4F55\u505C\u6B62\u670D\u52A1\u5462\uFF1F\u53EF\u4EE5\u76F4\u63A5\u6309\u4E0B <code>Ctrl+C</code> \u7EC4\u5408\u952E\u2014\u2014\u7C97\u66B4\u3001\u58C1\u549A\u3002</p><h3 id="_03\u3001\u5B89\u88C5-kibana" tabindex="-1"><a class="header-anchor" href="#_03\u3001\u5B89\u88C5-kibana" aria-hidden="true">#</a> 03\u3001\u5B89\u88C5 Kibana</h3><p>\u901A\u8FC7 Kibana\uFF0C\u6211\u4EEC\u53EF\u4EE5\u5BF9 Elasticsearch \u670D\u52A1\u8FDB\u884C\u53EF\u89C6\u5316\u64CD\u4F5C\uFF0C\u5C31\u50CF\u5728 Linux \u64CD\u4F5C\u7CFB\u7EDF\u4E0B\u5B89\u88C5\u4E00\u4E2A\u56FE\u5F62\u5316\u754C\u9762\u4E00\u6837\u3002</p><p>\u4E0B\u8F7D\u5730\u5740\u5982\u4E0B\uFF1A</p>',19),f={href:"https://www.elastic.co/cn/downloads/kibana",target:"_blank",rel:"noopener noreferrer"},E=s("https://www.elastic.co/cn/downloads/kibana"),_=t(`<p>\u6700\u65B0\u7684\u7248\u672C\u662F 7.6.2\uFF0C284M \u5DE6\u53F3\uFF0C\u4F53\u79EF\u548C Elasticsearch \u5DEE\u4E0D\u591A\u3002\u9009\u62E9\u4E0B\u8F7D Windows \u7248\uFF0Czip \u683C\u5F0F\u7684\uFF0C\u5B8C\u6210\u540E\u76F4\u63A5\u89E3\u538B\u5C31\u884C\u4E86\u3002\u4E0B\u8F7D\u7684\u8FC7\u7A0B\u4E2D\u53C8\u53BB\u6D17\u4E86 6 \u9897\u8461\u8404\u5403\uFF0C\u72D7\u5934\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/elasticsearch/rumen-12372ee6-acc0-4425-964b-ca32886f17ce.jpg" alt=""></p><p>\u5305\u76EE\u5F55\u4E0D\u518D\u4E00\u4E00\u89E3\u91CA\u4E86\uFF0C\u8FDB\u5165 bin \u76EE\u5F55\u4E0B\uFF0C\u53CC\u51FB\u8FD0\u884C kibana.bat \u6587\u4EF6\uFF0C\u542F\u52A8 Kibana \u670D\u52A1\u3002\u6574\u4E2A\u8FC7\u7A0B\u6BD4 Elasticsearch \u8981\u6162\u4E00\u4E9B\uFF0C\u5F53\u770B\u5230 <code>[Kibana][http] http server running</code> \u7684\u4FE1\u606F\u540E\uFF0C\u8BF4\u660E\u670D\u52A1\u542F\u52A8\u6210\u529F\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/elasticsearch/rumen-784d70ef-b6e7-4312-85f1-36ace9b2a5bd.jpg" alt=""></p><p>\u5728\u6D4F\u89C8\u5668\u5730\u5740\u680F\u8F93\u5165 <code>http://localhost:5601</code> \u67E5\u770B Kibana \u7684\u56FE\u5F62\u5316\u754C\u9762\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/elasticsearch/rumen-e6f64545-a925-4bb4-a25e-44129832fb4e.jpg" alt=""></p><p>\u7531\u4E8E\u5F53\u524D\u7684 Elasticsearch \u670D\u52A1\u7AEF\u4E2D\u8FD8\u6CA1\u6709\u4EFB\u4F55\u6570\u636E\uFF0C\u6240\u4EE5\u6211\u4EEC\u53EF\u4EE5\u9009\u62E9\u300CTry Our Sample Data\u300D\u5BFC\u5165 Kibana \u63D0\u4F9B\u7684\u6A21\u62DF\u6570\u636E\u4F53\u9A8C\u4E00\u4E0B\u3002\u4E0B\u56FE\u662F\u5BFC\u5165\u7535\u5546\u6570\u636E\u5E93\u7684\u770B\u677F\u9875\u9762\uFF0C\u662F\u4E0D\u662F\u5F88\u4E30\u5BCC\uFF1F</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/elasticsearch/rumen-a16d99ff-272d-43bb-aa94-23b240cc464b.jpg" alt=""></p><p>\u6253\u5F00 Dev Tools \u9762\u677F\uFF0C\u53EF\u4EE5\u770B\u5230\u4E00\u4E2A\u7B80\u5355\u7684 DSL \u67E5\u8BE2\u8BED\u53E5\uFF08\u4E00\u79CD\u5B8C\u5168\u57FA\u4E8E JSON \u7684\u7279\u5B9A\u4E8E\u9886\u57DF\u7684\u8BED\u8A00\uFF09\uFF0C\u70B9\u51FB\u300C\u8FD0\u884C\u300D\u6309\u94AE\u540E\u5C31\u53EF\u4EE5\u770B\u5230 JSON \u683C\u5F0F\u7684\u6570\u636E\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/elasticsearch/rumen-5c44bd79-d3a9-49fb-9414-04dc38840cfb.jpg" alt=""></p><h3 id="_04\u3001elasticsearch-\u7684\u5173\u952E\u6982\u5FF5" tabindex="-1"><a class="header-anchor" href="#_04\u3001elasticsearch-\u7684\u5173\u952E\u6982\u5FF5" aria-hidden="true">#</a> 04\u3001Elasticsearch \u7684\u5173\u952E\u6982\u5FF5</h3><p>\u5728\u8FDB\u884C\u4E0B\u4E00\u6B65\u4E4B\u524D\uFF0C\u9700\u8981\u5148\u6765\u7406\u89E3 Elasticsearch \u4E2D\u7684\u51E0\u4E2A\u5173\u952E\u6982\u5FF5\uFF0C\u6BD4\u5982\u8BF4\u4EC0\u4E48\u662F\u7D22\u5F15\uFF0C\u4EC0\u4E48\u662F\u7C7B\u578B\uFF0C\u4EC0\u4E48\u662F\u6587\u6863\u7B49\u7B49\u3002Elasticsearch \u65E2\u7136\u662F\u4E00\u4E2A\u6570\u636E\u5F15\u64CE\uFF0C\u5B83\u91CC\u9762\u7684\u4E00\u4E9B\u6982\u5FF5\u5C31\u548C MySQL \u6709\u4E00\u5B9A\u7684\u5173\u7CFB\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/elasticsearch/rumen-ad2b2f8c-5a19-4c5e-9bc7-cf7ba17830bf.jpg" alt=""></p><p>\u770B\u5B8C\u4E0A\u9762\u8FD9\u5E45\u56FE\uFF08\u6765\u6E90\u4E8E\u7F51\u7EDC\uFF0C\u4FB5\u5220\uFF09\uFF0C\u662F\u4E0D\u662F\u77AC\u95F4\u5C31\u6E05\u6670\u4E86\u3002\u5411 Elasticsearch \u4E2D\u5B58\u50A8\u6570\u636E\uFF0C\u5176\u5B9E\u5C31\u662F\u5411 Elasticsearch \u4E2D\u7684 index \u4E0B\u9762\u7684 type \u4E2D\u5B58\u50A8 JSON \u7C7B\u578B\u7684\u6570\u636E\u3002</p><h3 id="_05\u3001\u5728-java-\u4E2D\u4F7F\u7528-elasticsearch" tabindex="-1"><a class="header-anchor" href="#_05\u3001\u5728-java-\u4E2D\u4F7F\u7528-elasticsearch" aria-hidden="true">#</a> 05\u3001\u5728 Java \u4E2D\u4F7F\u7528 Elasticsearch</h3><p>\u6709\u4E9B\u5C0F\u4F19\u4F34\u53EF\u80FD\u4F1A\u95EE\uFF0C\u201C\u4E8C\u54E5\uFF0C\u6211\u662F\u4E00\u540D Java \u7A0B\u5E8F\u5458\uFF0C\u6211\u8BE5\u5982\u4F55\u5728 Java \u4E2D\u4F7F\u7528 Elasticsearch \u5462\uFF1F\u201D\u8FD9\u4E2A\u95EE\u9898\u95EE\u5F97\u597D\uFF0C\u8FD9\u5C31\u6765\uFF0C\u8FD9\u5C31\u6765\u3002</p><p>Elasticsearch \u65E2\u7136\u5185\u7F6E\u4E86 Java \u8FD0\u884C\u73AF\u5883\uFF0C\u81EA\u7136\u5C31\u63D0\u4F9B\u4E86\u4E00\u7CFB\u5217 API \u4F9B\u6211\u4EEC\u64CD\u4F5C\u3002</p><p>\u7B2C\u4E00\u6B65\uFF0C\u5728\u9879\u76EE\u4E2D\u6DFB\u52A0 Elasticsearch \u5BA2\u6237\u7AEF\u4F9D\u8D56\uFF1A</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
     &lt;groupId&gt;org.elasticsearch.client&lt;/groupId&gt;
     &lt;artifactId&gt;elasticsearch-rest-high-level-client&lt;/artifactId&gt;
     &lt;version&gt;7.6.2&lt;/version&gt;
diff --git a/dist/assets/shanganaliyun.html.fc60e761.js b/dist/assets/shanganaliyun.html.802605a1.js
similarity index 99%
rename from dist/assets/shanganaliyun.html.fc60e761.js
rename to dist/assets/shanganaliyun.html.802605a1.js
index 5ac04b9f..a5801f4d 100644
--- a/dist/assets/shanganaliyun.html.fc60e761.js
+++ b/dist/assets/shanganaliyun.html.802605a1.js
@@ -1 +1 @@
-import{_ as i}from"./plugin-vue_export-helper.21dcd24c.js";import{r,o as p,c as n,a as e,b as o,d as a,e as l}from"./app.a0271b9c.js";const c={},s=e("h1",{id:"\u6625\u62DB\u65A9\u83B7\u6DF1\u5733\u817E\u8BAFpcg\u548C\u676D\u5DDE\u963F\u91CC\u4E91",tabindex:"-1"},[e("a",{class:"header-anchor",href:"#\u6625\u62DB\u65A9\u83B7\u6DF1\u5733\u817E\u8BAFpcg\u548C\u676D\u5DDE\u963F\u91CC\u4E91","aria-hidden":"true"},"#"),a(" \u6625\u62DB\u65A9\u83B7\u6DF1\u5733\u817E\u8BAFPCG\u548C\u676D\u5DDE\u963F\u91CC\u4E91")],-1),h=a("\u8F6C\u8F7D\u94FE\u63A5\uFF1A"),d={href:"https://mp.weixin.qq.com/s/EB_NCC2fNyYHuz04k1H4Nw",target:"_blank",rel:"noopener noreferrer"},u=a("https://mp.weixin.qq.com/s/EB_NCC2fNyYHuz04k1H4Nw"),b=l('<p>\u5927\u5BB6\u597D\uFF0C\u6211\u662F\u4E8C\u54E5\u5440\uFF01\u6625\u62DB\u5373\u5C06\u5230\u6765\uFF0C\u795D\u53C2\u52A0\u9762\u8BD5\u7684\u5C0F\u4F19\u4F34\u90FD\u80FD\u987A\u5229\u62FF\u5230\u6EE1\u610F\u7684 offer!</p><p>\u4E3A\u4E86\u7ED9\u5C0F\u4F19\u4F34\u4EEC\u4E00\u70B9\u70B9\u5E2E\u52A9\u548C\u542F\u53D1\uFF0C\u6211\u4E5F\u4F1A\u5206\u4EAB\u4E00\u4E9B\u6BD4\u8F83\u6709\u4EF7\u503C\u7684\u8BFB\u8005\u9762\u7ECF\uFF0C\u8FD9\u662F\u4E00\u7BC7\u6765\u81EA\u4E00\u4F4D\u8001\u8BFB\u8005\u7684\u786C\u6838\u6625\u62DB\u9762\u7ECF\u5206\u4EAB\u3002\u5185\u5BB9\u5305\u62EC\uFF1A</p><ul><li>\u57FA\u672C\u60C5\u51B5\uFF08\u5B66\u6821\u3001offer \u60C5\u51B5......\uFF09</li><li>\u4E3A\u4EC0\u4E48\u9009\u62E9\u4E92\u8054\u7F51\u884C\u4E1A\u7814\u53D1\u5C97</li><li>\u5B66\u4E60 Java \u5F00\u53D1\u7684\u7ECF\u9A8C\u603B\u7ED3</li><li>\u5B66\u4E60\u65B9\u6CD5\u548C\u5FC3\u6001\u4E0A\u7684\u5EFA\u8BAE</li><li>\u8BFB\u7814\u76F8\u5173</li></ul><hr><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mianjing/shanganaliyun-1.png" alt=""></p><p>\u6211\u7684\u6635\u79F0\u662F\u98CE\uFF0C\u6765\u81EA\u6D59\u6C5F\u821F\u5C71\uFF0C\u5357\u822A\u8BFB\u7814\uFF0C\u6B66\u5927\u672C\u79D1\uFF0C\u4E13\u4E1A\u662F\u8BA1\u7B97\u673A\u3002</p><p><em>\u4E8C\u54E5 : \u672C\u7855\u90FD\u662F\u540D\u6821\uFF01TQL\uFF01\u5149\u8FD9\u4E00\u70B9\u5C31\u9886\u5148\u4E86\u5927\u90E8\u5206\u6C42\u804C\u8005</em>\u3002</p><p>\u8003\u7814\u7ED3\u675F\u9009\u62E9\u4E86 Java \u5F00\u53D1\u5C97\u4F5C\u4E3A\u5DE5\u4F5C\uFF0C\u5728\u7814\u7A76\u751F\u9636\u6BB5\u9009\u62E9\u653E\u517B\u578B\u7684\u5BFC\u5E08\uFF0C\u56E0\u6B64\u6709\u5927\u91CF\u7A7A\u95F2\u65F6\u95F4 \u9762\u5411\u5C31\u4E1A\u5B66\u4E60 \uFF0C\u7CFB\u7EDF\u5730\u5B66\u4E60\u4E86\u5F88\u591A\u904D\u57FA\u7840\u77E5\u8BC6\uFF0C\u5237\u4E86\u5F88\u591A\u904D\u7B97\u6CD5\u9898\u3002\u8DDF\u7740\u6559\u7A0B\u505A\u4E86\u4E00\u4E2A\u8BBA\u575B\u7C7B\u7F51\u7AD9\u7684\u9879\u76EE\uFF0C\u5728\u53C2\u52A0\u7684\u5B66\u751F\u4FF1\u4E50\u90E8\u91CC\u63A5\u5230\u5B66\u6821\u8001\u5E08\u624B\u4E0A\u7684\u4E00\u4E2A\u5B89\u9632\u7C7B\u7684\u4E0A\u7EBF\u9879\u76EE\uFF0C\u505A\u7684 Java \u540E\u7AEF\u5DE5\u4F5C\u3002\u5076\u5C14\u81EA\u5DF1\u5728\u4E2A\u4EBA\u7F51\u7AD9\u5199\u535A\u5BA2\uFF0C\u5728\u6821\u4E5F\u901A\u8FC7\u4E86 CET6\uFF0C\u79D1\u7814\u505A\u4E86\u4E00\u4E2A\u4EFB\u52A1\u8C03\u5EA6\u7B97\u6CD5\u7814\u7A76\u3002</p><p>\u6625\u62DB\u4E24\u4E2A\u6708\u9762\u8BD5\u4E86\u591A\u5BB6\u5934\u90E8\u4E92\u8054\u7F51\u516C\u53F8\u7684 Java \u5F00\u53D1\u5C97\uFF0C\u5E76\u6536\u83B7 \u6DF1\u5733\u817E\u8BAF PCG \u548C \u676D\u5DDE\u963F\u91CC\u4E91 \u7684 offer\u3002\u6211\u9009\u62E9\u4E86\u540E\u8005\uFF0C\u56E0\u4E3A\u676D\u5DDE\u8FD9\u4E2A\u57CE\u5E02\u66F4\u52A0\u9002\u5408\u6211\u3002\u4ECA\u5E74\u8FD9\u4E24\u5BB6\u5B9E\u4E60 hc \u589E\u52A0\u4E86\u5DE8\u591A\uFF0C\u4E5F\u5C31\u610F\u5473\u7740\u9762\u8BD5\u96BE\u5EA6\u964D\u4F4E\uFF0C\u5E76\u4E14\u5B9E\u4E60\u5DE5\u8D44\u4E5F\u6709\u660E\u663E\u4E0A\u5347\u3002\u4E2A\u4EBA\u5206\u6790\u662F\u540E\u75AB\u60C5\u65F6\u4EE3\u6062\u590D\u7ECF\u6D4E\u53D1\u5C55\uFF0C\u516C\u53F8\u8FDB\u884C\u4E1A\u52A1\u6269\u5F20\uFF0C\u5BF9\u4EBA\u624D\u7684\u9700\u6C42\u8981\u6BD4\u5F80\u5E74\u9AD8\u3002\u7B97\u662F\u5E78\u8FD0\u5730\u5403\u5230\u4E86\u5927\u5C40\u52BF\u7684\u7EA2\u5229\u3002</p><h3 id="\u4E00\u3001\u5C97\u4F4D\u9009\u62E9" tabindex="-1"><a class="header-anchor" href="#\u4E00\u3001\u5C97\u4F4D\u9009\u62E9" aria-hidden="true">#</a> \u4E00\u3001\u5C97\u4F4D\u9009\u62E9</h3><blockquote><p>\u4E3A\u4EC0\u4E48\u9009\u62E9 CS\uFF1F</p></blockquote><p>\u5F15\u7528\u674E\u667A\u6167\u524D\u8F88\u300A\u5927\u578B\u7F51\u7AD9\u6280\u672F\u67B6\u6784\u300B\u4E00\u4E66\u7684\u540E\u8BB0\u90E8\u5206\u5BF9\u4E8E\u4E92\u8054\u7F51\u7684\u63CF\u8FF0\uFF1A</p><blockquote><p>\u4E92\u8054\u7F51\u6CA1\u6709\u95E8\u69DB\uFF0C\u8C01\u90FD\u53EF\u4EE5\u8FDB\u6765\u73A9\uFF0C\u4F46\u662F\u8FDB\u6765\u540E\uFF0C\u6700\u597D\u628A\u90A3\u4E9B\u9648\u65E7\u7684\u601D\u60F3\u548C\u5305\u88B1\u653E\u4E0B\uFF0C\u91CD\u65B0\u6765\u8FC7\u3002<br><br> 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\u4E92\u8054\u7F51\u662F\u4E00\u79CD\u7CBE\u795E\uFF0C\u4E00\u79CD\u5F00\u653E\u3001\u5206\u4EAB\u3001\u81EA\u7531\u7684\u7CBE\u795E\uFF1B\u8D8A\u662F\u4ED8\u51FA\u4E0D\u95EE\u56DE\u62A5\uFF0C\u8D8A\u662F\u83B7\u5F97\u4E30\u539A\u7684\u56DE\u62A5\uFF1B\u8D8A\u662F\u4E0D\u8BBE\u8FB9\u754C\uFF0C\u8D8A\u662F\u62E5\u6709\u6574\u4E2A\u4E16\u754C\u3002\u4E92\u8054\u7F51\u662F\u4E00\u79CD\u98A0\u8986\uFF0C\u6253\u788E\u6240\u6709\u7684\u85E9\u7BF1\uFF0C\u7ED9\u6240\u6709\u4EBA\u5E73\u7B49\u8868\u8FBE\u548C\u83B7\u53D6\u7684\u673A\u4F1A\uFF0C\u6BCF\u4E2A\u4EBA\u90FD\u53EF\u4EE5\u53D1\u51FA\u81EA\u5DF1\u7684\u58F0\u97F3\u3002\u4E92\u8054\u7F51\u662F\u4E00\u79CD\u5EFA\u8BBE\uFF0C\u91CD\u5851\u4EBA\u4EEC\u7684\u601D\u7EF4\u65B9\u5F0F\u548C\u793E\u4F1A\u8FD0\u884C\u65B9\u5F0F\uFF0C\u5EFA\u8BBE\u4E00\u4E2A\u4EBA\u548C\u4EBA\u5F7C\u6B64\u7406\u89E3\u4FE1\u4EFB\u7684\u5927\u540C\u4E16\u754C\u3002<br><br> \u4E92\u8054\u7F51\u6B63\u5728\u5E76\u5C06\u7EE7\u7EED\u6539\u53D8\u8FD9\u4E2A\u4E16\u754C\uFF0C\u4E00\u5207\u624D\u521A\u521A\u5F00\u59CB\uFF0C\u4F60\u6211\u6B63\u751F\u9022\u5176\u65F6\uFF01</p></blockquote><p>\u6211\u8BA4\u4E3A\u8EAB\u5904\u5728\u4E92\u8054\u7F51\u65F6\u4EE3\uFF0C\u62E5\u6709\u4FE1\u606F\u5373\u62E5\u6709\u4E86\u4E00\u5207\u3002\u79EF\u6781\u62E5\u62B1\u53D8\u5316\uFF0C\u4F7F\u7528\u8BA1\u7B97\u673A\u6280\u672F\u6539\u53D8\u4E16\u754C\uFF0C\u63D0\u9AD8\u751F\u4EA7\u529B\uFF0C\u63A8\u52A8\u4EBA\u7C7B\u8FDB\u6B65\uFF0C\u662F\u6781\u5177\u4EF7\u503C\u7684\u4E8B\u4E1A\u3002\u8FD9\u4EFD\u7406\u60F3\u4E5F\u662F\u6211\u524D\u8FDB\u7684\u52A8\u529B\u3002\u52A0\u6CB9\uFF0C\u6280\u672F\u4EBA\uFF01</p><blockquote><p>\u4E3A\u4EC0\u4E48\u9009\u62E9 Java 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\u5F00\u53D1\u5E02\u9762\u4E0A\u7684\u5360\u6709\u7387\u9AD8\uFF0C\u5927\u591A\u6570\u4E1A\u52A1\u5F00\u53D1\u4F7F\u7528 Java\uFF0C\u610F\u5473\u7740\u5C97\u4F4D\u6570\u91CF\u591A\u3002\u540C\u65F6\uFF0CJava \u5B66\u4E60\u8D44\u6E90\u591A\uFF0C\u793E\u533A\u6D3B\u8DC3\uFF0C\u4FBF\u4E8E\u5B66\u4E60\u3002\u53E6\u5916\uFF0CJava \u6709\u6210\u719F\u7684\u4E00\u5957\u4F53\u7CFB\uFF0C\u6280\u672F\u6808\u5B8C\u6574\uFF0C\u5E02\u9762\u4E0A\u73B0\u6709\u4E1A\u52A1\u5BF9 Java \u7684\u4F9D\u8D56\u5EA6\u9AD8\u3002</p><p>Guide \u54E5 : \u76EE\u524D\uFF0C\u867D\u7136\u6709\u5404\u79CD\u7F16\u7A0B\u8BED\u8A00\u5F02\u519B\u7A81\u8D77\uFF0C\u4F46\u662F Java \u5E9E\u5927\u7684\u751F\u6001\u5728\u4F01\u4E1A\u5F00\u53D1\u9886\u57DF\u8FD8\u662F\u5F88\u96BE\u88AB\u64BC\u52A8\u7684\uFF01\u5E76\u4E14\uFF0C Java \u81EA\u8EAB\u4E5F\u5728\u8D8A\u6765\u8D8A\u597D\uFF01</p><h3 id="\u5B66\u4E60\u7ECF\u5386" tabindex="-1"><a class="header-anchor" href="#\u5B66\u4E60\u7ECF\u5386" aria-hidden="true">#</a> \u5B66\u4E60\u7ECF\u5386</h3><blockquote><p>\u5E78\u8FD0\u53C8\u8FF7\u832B\u7684\u5F00\u59CB</p></blockquote><p>\u6211\u5F00\u59CB\u9762\u5411\u5C31\u4E1A\u5B66\u4E60\u8BA1\u7B97\u673A\u77E5\u8BC6\uFF0C\u662F\u5728\u672C\u79D1\u5BA4\u53CB\u7684\u63A8\u8350\u4E0B\uFF0C\u627E\u5230\u4E86 CS-Notes \u8FD9\u4E2A GitHub \u4ED3\u5E93\uFF0C\u4ECE\u6B64\u5F00\u542F\u4E86\u65B0\u4E16\u754C\u7684\u5927\u95E8\u3002</p><p>\u5BA4\u53CB\u8FD8\u540C\u65F6\u63A8\u8350\u6211\u627E Java \u5F00\u53D1\u5C97\u7684\u5DE5\u4F5C\uFF0C\u76F8\u5BF9\u4ED6\u627E\u7684 C++\u8981\u7B80\u5355\u4E0D\u5C11\u3002\u5BA4\u53CB\u8FD8\u63A8\u8350\u6211\u591A\u5237\u7B97\u6CD5\u9898\uFF0C\u63A8\u8350\u6211\u4F7F\u7528 MacBook \u63D0\u9AD8\u5B66\u4E60\u6548\u7387\u3002\u6709\u4E00\u4F4D\u597D\u53CB\u4F5C\u4E3A\u5F15\u8DEF\u4EBA\uFF0C\u771F\u7684\u975E\u5E38\u5E78\u8FD0\u3002</p><p>\u8FF7\u832B\u662F\u5728\u6211\u8FDB\u5165\u5230\u4E00\u4E9B\u793E\u533A\u548C\u5B66\u4E60\u4EA4\u6D41\u7FA4\u4E2D\uFF0C\u9762\u5BF9\u6D77\u91CF\u7684\u5B66\u4E60\u8D44\u6E90\u548C\u5404\u79CD\u8A00\u8BBA\uFF0C\u89C9\u5F97\u5F88\u96BE\u7504\u522B\u51FA\u4F18\u8D28\u7684\u4FE1\u606F\u3002\u56E0\u4E3A\u7F3A\u4E4F\u7ECF\u9A8C\uFF0C\u4EA7\u751F\u7684\u95EE\u9898\u4E00\u76F4\u5806\u79EF\uFF0C\u65E0\u6CD5\u987A\u5229\u89E3\u51B3\u95EE\u9898\u7684\u5931\u843D\u611F\uFF0C\u751A\u81F3\u4E00\u5EA6\u8BA9\u6211\u5BF9\u5B66\u4E60\u4EA7\u751F\u6392\u65A5\u3002\u5F53\u65F6\u8FD8\u662F\u5B89\u6170\u81EA\u5DF1\u8F66\u5230\u5C71\u524D\u5FC5\u6709\u8DEF\uFF0C\u575A\u6301\u575A\u6301\u8FD8\u662F\u575A\u6301\uFF0C\u52AA\u529B\u63D0\u9AD8\u81EA\u5DF1\u773C\u754C\uFF0C\u5E76\u53CA\u65F6\u6E05\u7406\u81EA\u5DF1\u7684\u8D1F\u9762\u60C5\u7EEA\u3002</p><blockquote><p>\u80FD\u529B\u7A33\u5B9A\u63D0\u5347\u7684\u9636\u6BB5</p></blockquote><p>\u540E\u6765\uFF0C\u5728 GitHub \u4E0A\u627E\u5230\u4E86 JavaGuide\uFF0C\u4E2A\u4EBA\u8BA4\u4E3A\u662F Java \u9886\u57DF\u6574\u7406\u6700\u5168\u9762\u7684\u4E00\u4E2A\u4ED3\u5E93\uFF0C\u6211\u7CFB\u7EDF\u5730\u5B66\u5230\u4E86\u5B66\u4E60\u8DEF\u5F84\uFF0C\u5B66\u4E60\u65B9\u6CD5\uFF0C\u4F5C\u4E3A\u7A0B\u5E8F\u5458\u5E94\u8BE5\u5177\u6709\u7684\u826F\u597D\u4E60\u60EF\u7B49\u7B49\u3002\u6211\u8FD8\u5173\u6CE8\u4E86\u4E8C\u54E5\u7684\u516C\u4F17\u53F7\uFF0C\u770B\u4E86\u8BB8\u8BB8\u591A\u591A\u4E8C\u54E5\u539F\u521B\u7684\u4F18\u8D28\u6587\u7AE0\u3002</p><p>\u8FDB\u5165\u7814\u7A76\u751F\u9636\u6BB5\u540E\uFF0C\u5728\u5B9E\u9A8C\u5BA4\uFF0C\u5B66\u751F\u4FF1\u4E50\u90E8\uFF0C\u5404\u79CD\u6D3B\u52A8\u6BD4\u8D5B\uFF0C\u516C\u53F8\u7684\u5BA3\u8BB2\u4F1A\u7B49\uFF0C\u90FD\u80FD\u5B66\u5230\u5F88\u591A\u4E1C\u897F\uFF0C\u8BA4\u8BC6\u5F88\u591A\u670B\u53CB\u3002\u6211\u8BA4\u4E3A\u6709\u5FD7\u540C\u9053\u5408\u7684\u670B\u53CB\u4E00\u8D77\u5B66\u4E60\uFF0C\u4E92\u76F8\u67E5\u6F0F\u8865\u7F3A\uFF0C\u5E2E\u5FD9\u89E3\u51B3\u95EE\u9898\uFF0C\u76F8\u5BF9\u6211\u4E4B\u524D\u7684\u81EA\u5B66\uFF0C\u6548\u7387\u4E0A\u8981\u63D0\u9AD8\u4E0D\u5C11\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mianjing/shanganaliyun-2.png" alt=""></p><p>\u5728\u4E86\u89E3\u5230\u9879\u76EE\u5728\u9762\u8BD5\u4E2D\u5360\u636E\u6BD4\u8F83\u91CD\u8981\u7684\u4F4D\u7F6E\uFF0C\u6211\u4F1A\u5728\u5B66\u4E60\u5B8C\u7406\u8BBA\u77E5\u8BC6\u540E\uFF0C\u5C3D\u91CF\u7528\u4EE3\u7801\u5B9E\u8DF5\u3002\u5728\u81EA\u5DF1\u5B66\u4E60\u9879\u76EE\u89C6\u9891\u6559\u7A0B\uFF0C\u5E76\u8DDF\u7740\u624B\u6253\u8FC7\u540E\uFF0C\u6211\u53C2\u4E0E\u5230\u5B66\u6821\u8001\u5E08\u624B\u4E0B\u7684\u4E00\u4E2A\u4E0A\u7EBF\u9879\u76EE\uFF0C\u771F\u6B63\u7528\u6280\u672F\u89E3\u51B3\u5B9E\u9645\u95EE\u9898\u3002</p><blockquote><p>\u6625\u62DB\u9762\u8BD5\u9636\u6BB5</p></blockquote><p>\u867D\u7136\u5B66\u4E60\u5F00\u59CB\u5C31\u76EE\u6807\u5BF9\u51C6\u627E\u5DE5\u4F5C\uFF0C\u4F46\u662F\u6CA1\u6709\u5B9E\u9645\u9762\u8BD5\u7ECF\u9A8C\uFF0C\u8FD8\u662F\u8BA9\u6211\u5BF9\u4E8E\u80FD\u53D6\u5F97\u600E\u4E48 offer 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PCG\uFF0C\u7F8E\u56E2\uFF0C\u7F51\u6613\u4E92\u8054\u7F51\uFF0C\u5B57\u8282\uFF0C\u963F\u91CC\u8FD9\u51E0\u5BB6\u5934\u90E8\u5927\u5382\u3002\u817E\u8BAF\u7684\u9762\u8BD5\u7ECF\u5386\u7ED9\u4E86\u6211\u83AB\u5927\u7684\u9F13\u52B1\uFF0C\u6211\u611F\u5230\u975E\u5E38\u5E78\u8FD0\u80FD\u591F\u5F97\u5230\u817E\u8BAF\u7684\u8BA4\u53EF\uFF0C\u7279\u522B\u611F\u8C22\u4E00\u9762\u9762\u8BD5\u5B98\uFF0C\u5728\u7EBF\u4E0B\u9762\u8BD5\u4E2D\u7ED9\u4E88\u6211\u7684\u80AF\u5B9A\uFF0C\u4EE5\u53CA\u5BF9\u4E8E\u5728\u540E\u7AEF\u5F00\u53D1\u65B9\u5411\u4E0A\u7684\u6559\u5BFC\u3002\u4ECE\u817E\u8BAF\u4E00\u9762\uFF0C\u5230 oc\uFF0C\u603B\u5171 6 \u5929\uFF0C\u800C\u4E14\u6211\u7B14\u8BD5 0ac \u4E5F\u987A\u5229\u901A\u8FC7\uFF0C\u4E0D\u5F97\u4E0D\u8BF4\u817E\u8BAF\u4ECA\u5E74 hc \u4E4B\u591A\uFF0C\u96BE\u5EA6\u4E4B\u4F4E\uFF0C\u6D41\u7A0B\u4E4B\u5FEB\u3002\u76F8\u5BF9\u5B9E\u9A8C\u5BA4\u5176\u4ED6\u540C\u5B66\uFF0C\u6211 3.22 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\u5B66\u4E60\u65B9\u6CD5\u7684\u5EFA\u8BAE</h3><ul><li>\u5F17\u66FC\u5B66\u4E60\u6CD5\u3002</li><li>\u6CE8\u610F\u6548\u7387\uFF0C\u901F\u5EA6\u8981\u5FEB\u3002</li><li>\u6CE8\u610F\u5C06\u7406\u8BBA\u77E5\u8BC6\uFF0C\u7528\u4EE3\u7801\u5B9E\u8DF5\u3002</li><li>\u6BCF\u65E5\u6BCF\u5468\u6BCF\u6708\u521D\uFF0C\u89C4\u5212\u5B66\u4E60\u7684\u5185\u5BB9\u3002</li><li>\u7ED9\u9700\u8981\u5B66\u4E60\u7684\u5185\u5BB9\u6E05\u695A\u969C\u788D\uFF0C\u4E13\u6CE8\u5230\u4E00\u5757\u5185\u5BB9\u4E0A\uFF0C\u5E76\u4FDD\u8BC1\u5B66\u4E60\u7684\u8FDE\u7EED\u6027\u3002</li><li>\u591A\u8054\u60F3\u76F8\u5173\u7684\u77E5\u8BC6\u70B9\uFF0C\u63D0\u9AD8\u77E5\u8BC6\u8FC1\u79FB\u80FD\u529B\u3002</li><li>\u52E4\u505A\u7B14\u8BB0\uFF0C\u6CE8\u610F\u603B\u7ED3\u548C\u56DE\u987E\u3002</li></ul><h3 id="\u5FC3\u6001\u7684\u5EFA\u8BAE" tabindex="-1"><a class="header-anchor" href="#\u5FC3\u6001\u7684\u5EFA\u8BAE" aria-hidden="true">#</a> \u5FC3\u6001\u7684\u5EFA\u8BAE</h3><ul><li>\u8981\u8B66\u60D5\u7F51\u4E0A\u6216\u8005\u8EAB\u8FB9\u4EBA\u6240\u8D29\u5356\u7684\u7126\u8651\u3002</li><li>\u53D6\u5F97\u8FDB\u6B65\u9700\u8981\u6BCF\u5929\u524D\u8FDB\u5728\u6B63\u786E\u7684\u65B9\u5411\uFF0C\u5E76\u4E14\u5C3D\u81EA\u5DF1\u6700\u5927\u7684\u52AA\u529B\u3002</li><li>\u5BF9\u5F85\u81EA\u8EAB\u73B0\u72B6\u8981\u5B9E\u4E8B\u6C42\u662F\u3002\u73B0\u5728\u5B9E\u529B\u4E0D\u591F\u4E5F\u4E0D\u7528\u7070\u5FC3\uFF0C\u53EA\u80FD\u8BF4\u660E\u8FD8\u6CA1\u5230\u6700\u540E\uFF0C\u6700\u540E\u90FD\u4F1A\u6709\u5149\u660E\u7684\u672A\u6765\u3002</li><li>\u5FC3\u6025\u5403\u4E0D\u4E86\u70ED\u8C46\u8150\uFF0C\u4E00\u6B65\u4E00\u4E2A\u811A\u5370\uFF0C\u8E0F\u8E0F\u5B9E\u5B9E\u5730\u505A\u4E8B\u3002</li></ul><h3 id="\u5173\u4E8E\u8BFB\u7814" tabindex="-1"><a class="header-anchor" href="#\u5173\u4E8E\u8BFB\u7814" aria-hidden="true">#</a> \u5173\u4E8E\u8BFB\u7814</h3><p>\u6211\u672C\u4EBA\u662F\u5F3A\u70C8\u63A8\u8350\u5404\u4F4D\u672C\u79D1\u540C\u5B66\u8BFB\u7814\u3002</p><blockquote><p>\u4E3A\u4EC0\u4E48\u5462\uFF1F</p></blockquote><ul><li><strong>\u8BFB\u7814\u671F\u95F4\u4F1A\u6709\u5927\u91CF\u7684\u65F6\u95F4</strong> \uFF1A\u4E2A\u4EBA\u8BA4\u4E3A\uFF0C\u50CF\u6211\u4E00\u6837\u7684\u591A\u6570\u540C\u5B66\uFF0C\u5728\u7ECF\u5386\u4EE5\u9AD8\u8003\u5206\u6570\u4E3A\u76EE\u6807\u7684\u5E94\u8BD5\u6559\u80B2\u540E\uFF0C\u672C\u79D1\u9636\u6BB5\u9762\u5BF9\u5168\u65B0\u7684\u4E13\u4E1A\u77E5\u8BC6\u548C\u5B66\u4E60\u73AF\u5883\uFF0C\u4EE5\u53CA\u6765\u81EA\u4E92\u8054\u7F51\u548C\u8EAB\u8FB9\u5404\u79CD\u4FE1\u606F\uFF0C\u611F\u5230\u81EA\u7531\u4E14\u8FF7\u832B\u3002\u8FD9\u5F88\u6B63\u5E38\uFF0C\u6211\u4EEC\u9700\u8981\u7684\u662F\u65F6\u95F4\u53BB\u627E\u5230\u5408\u9002\u7684\u65B9\u5411\uFF0C\u5F62\u6210\u6709\u6548\u7684\u5B66\u4E60\u65B9\u6CD5\u3002</li><li><strong>\u66F4\u591A\u7684\u673A\u4F1A</strong> \uFF1A\u8003\u7814\u6709\u673A\u4F1A\u8FDB\u5165\u66F4\u597D\u7684\u5B66\u6821\uFF0C\u9009\u62E9\u66F4\u9002\u5408\u7684\u4E13\u4E1A\u3002\u773C\u754C\u7684\u63D0\u5347\uFF0C\u7ED3\u4EA4\u66F4\u4F18\u8D28\u7684\u4EBA\u8109\u4E5F\u5F88\u91CD\u8981\uFF0C\u63D0\u9AD8\u672A\u6765\u53D1\u5C55\u7684\u4E0A\u9650\u3002\u597D\u7684\u5BFC\u5E08\u80FD\u591F\u63D0\u4F9B\u597D\u7684\u7814\u7A76\u65B9\u5411\uFF0C\u597D\u7684\u9879\u76EE\uFF0C\u5E2E\u52A9\u6307\u5BFC\u79D1\u7814\u3002\u751A\u81F3\u80FD\u63A8\u8350\u5DE5\u4F5C\u548C\u8BFB\u535A\u6DF1\u9020\u3002</li><li><strong>\u7B80\u5386\u52A0\u5206</strong> 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C=i(c,[["render",k],["__file","shanganaliyun.html.vue"]]);export{C as default};
+import{_ as i}from"./plugin-vue_export-helper.21dcd24c.js";import{r,o as p,c as n,a as e,b as o,d as a,e as l}from"./app.615e41d8.js";const c={},s=e("h1",{id:"\u6625\u62DB\u65A9\u83B7\u6DF1\u5733\u817E\u8BAFpcg\u548C\u676D\u5DDE\u963F\u91CC\u4E91",tabindex:"-1"},[e("a",{class:"header-anchor",href:"#\u6625\u62DB\u65A9\u83B7\u6DF1\u5733\u817E\u8BAFpcg\u548C\u676D\u5DDE\u963F\u91CC\u4E91","aria-hidden":"true"},"#"),a(" \u6625\u62DB\u65A9\u83B7\u6DF1\u5733\u817E\u8BAFPCG\u548C\u676D\u5DDE\u963F\u91CC\u4E91")],-1),h=a("\u8F6C\u8F7D\u94FE\u63A5\uFF1A"),d={href:"https://mp.weixin.qq.com/s/EB_NCC2fNyYHuz04k1H4Nw",target:"_blank",rel:"noopener noreferrer"},u=a("https://mp.weixin.qq.com/s/EB_NCC2fNyYHuz04k1H4Nw"),b=l('<p>\u5927\u5BB6\u597D\uFF0C\u6211\u662F\u4E8C\u54E5\u5440\uFF01\u6625\u62DB\u5373\u5C06\u5230\u6765\uFF0C\u795D\u53C2\u52A0\u9762\u8BD5\u7684\u5C0F\u4F19\u4F34\u90FD\u80FD\u987A\u5229\u62FF\u5230\u6EE1\u610F\u7684 offer!</p><p>\u4E3A\u4E86\u7ED9\u5C0F\u4F19\u4F34\u4EEC\u4E00\u70B9\u70B9\u5E2E\u52A9\u548C\u542F\u53D1\uFF0C\u6211\u4E5F\u4F1A\u5206\u4EAB\u4E00\u4E9B\u6BD4\u8F83\u6709\u4EF7\u503C\u7684\u8BFB\u8005\u9762\u7ECF\uFF0C\u8FD9\u662F\u4E00\u7BC7\u6765\u81EA\u4E00\u4F4D\u8001\u8BFB\u8005\u7684\u786C\u6838\u6625\u62DB\u9762\u7ECF\u5206\u4EAB\u3002\u5185\u5BB9\u5305\u62EC\uFF1A</p><ul><li>\u57FA\u672C\u60C5\u51B5\uFF08\u5B66\u6821\u3001offer \u60C5\u51B5......\uFF09</li><li>\u4E3A\u4EC0\u4E48\u9009\u62E9\u4E92\u8054\u7F51\u884C\u4E1A\u7814\u53D1\u5C97</li><li>\u5B66\u4E60 Java \u5F00\u53D1\u7684\u7ECF\u9A8C\u603B\u7ED3</li><li>\u5B66\u4E60\u65B9\u6CD5\u548C\u5FC3\u6001\u4E0A\u7684\u5EFA\u8BAE</li><li>\u8BFB\u7814\u76F8\u5173</li></ul><hr><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mianjing/shanganaliyun-1.png" alt=""></p><p>\u6211\u7684\u6635\u79F0\u662F\u98CE\uFF0C\u6765\u81EA\u6D59\u6C5F\u821F\u5C71\uFF0C\u5357\u822A\u8BFB\u7814\uFF0C\u6B66\u5927\u672C\u79D1\uFF0C\u4E13\u4E1A\u662F\u8BA1\u7B97\u673A\u3002</p><p><em>\u4E8C\u54E5 : \u672C\u7855\u90FD\u662F\u540D\u6821\uFF01TQL\uFF01\u5149\u8FD9\u4E00\u70B9\u5C31\u9886\u5148\u4E86\u5927\u90E8\u5206\u6C42\u804C\u8005</em>\u3002</p><p>\u8003\u7814\u7ED3\u675F\u9009\u62E9\u4E86 Java \u5F00\u53D1\u5C97\u4F5C\u4E3A\u5DE5\u4F5C\uFF0C\u5728\u7814\u7A76\u751F\u9636\u6BB5\u9009\u62E9\u653E\u517B\u578B\u7684\u5BFC\u5E08\uFF0C\u56E0\u6B64\u6709\u5927\u91CF\u7A7A\u95F2\u65F6\u95F4 \u9762\u5411\u5C31\u4E1A\u5B66\u4E60 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\u5B66\u4E60\u7ECF\u5386</h3><blockquote><p>\u5E78\u8FD0\u53C8\u8FF7\u832B\u7684\u5F00\u59CB</p></blockquote><p>\u6211\u5F00\u59CB\u9762\u5411\u5C31\u4E1A\u5B66\u4E60\u8BA1\u7B97\u673A\u77E5\u8BC6\uFF0C\u662F\u5728\u672C\u79D1\u5BA4\u53CB\u7684\u63A8\u8350\u4E0B\uFF0C\u627E\u5230\u4E86 CS-Notes \u8FD9\u4E2A GitHub \u4ED3\u5E93\uFF0C\u4ECE\u6B64\u5F00\u542F\u4E86\u65B0\u4E16\u754C\u7684\u5927\u95E8\u3002</p><p>\u5BA4\u53CB\u8FD8\u540C\u65F6\u63A8\u8350\u6211\u627E Java \u5F00\u53D1\u5C97\u7684\u5DE5\u4F5C\uFF0C\u76F8\u5BF9\u4ED6\u627E\u7684 C++\u8981\u7B80\u5355\u4E0D\u5C11\u3002\u5BA4\u53CB\u8FD8\u63A8\u8350\u6211\u591A\u5237\u7B97\u6CD5\u9898\uFF0C\u63A8\u8350\u6211\u4F7F\u7528 MacBook 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src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mianjing/shanganaliyun-2.png" alt=""></p><p>\u5728\u4E86\u89E3\u5230\u9879\u76EE\u5728\u9762\u8BD5\u4E2D\u5360\u636E\u6BD4\u8F83\u91CD\u8981\u7684\u4F4D\u7F6E\uFF0C\u6211\u4F1A\u5728\u5B66\u4E60\u5B8C\u7406\u8BBA\u77E5\u8BC6\u540E\uFF0C\u5C3D\u91CF\u7528\u4EE3\u7801\u5B9E\u8DF5\u3002\u5728\u81EA\u5DF1\u5B66\u4E60\u9879\u76EE\u89C6\u9891\u6559\u7A0B\uFF0C\u5E76\u8DDF\u7740\u624B\u6253\u8FC7\u540E\uFF0C\u6211\u53C2\u4E0E\u5230\u5B66\u6821\u8001\u5E08\u624B\u4E0B\u7684\u4E00\u4E2A\u4E0A\u7EBF\u9879\u76EE\uFF0C\u771F\u6B63\u7528\u6280\u672F\u89E3\u51B3\u5B9E\u9645\u95EE\u9898\u3002</p><blockquote><p>\u6625\u62DB\u9762\u8BD5\u9636\u6BB5</p></blockquote><p>\u867D\u7136\u5B66\u4E60\u5F00\u59CB\u5C31\u76EE\u6807\u5BF9\u51C6\u627E\u5DE5\u4F5C\uFF0C\u4F46\u662F\u6CA1\u6709\u5B9E\u9645\u9762\u8BD5\u7ECF\u9A8C\uFF0C\u8FD8\u662F\u8BA9\u6211\u5BF9\u4E8E\u80FD\u53D6\u5F97\u600E\u4E48 offer 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\uFF1A\u4E00\u5B9A\u8981\u52A0\u4E0A\u90E8\u95E8\u5185\u90E8\u524D\u8F88\u7684\u8054\u7CFB\u65B9\u5F0F\uFF0C\u53CA\u65F6\u8BE2\u95EE\u9762\u8BD5\u53CD\u9988\u548C\u8FDB\u5EA6\u3002\u540C\u65F6\u8981\u52A0\u90E8\u95E8\u7684\u62DB\u8058\u7FA4\uFF0C\u6216\u8005\u4EA4\u6D41\u7FA4\uFF0C\u53CA\u65F6\u4E86\u89E3\u653F\u7B56\u53D8\u52A8\uFF0C\u5176\u4ED6\u540C\u5B66\u662F\u5426\u6536\u5230\u9762\u8BD5\u901A\u77E5\u4E43\u81F3 offer \u7B49\uFF0C\u8FD9\u4E9B\u4FE1\u606F\u975E\u5E38\u91CD\u8981\u3002</p><h3 id="\u5B66\u4E60\u65B9\u6CD5\u7684\u5EFA\u8BAE" tabindex="-1"><a class="header-anchor" href="#\u5B66\u4E60\u65B9\u6CD5\u7684\u5EFA\u8BAE" aria-hidden="true">#</a> \u5B66\u4E60\u65B9\u6CD5\u7684\u5EFA\u8BAE</h3><ul><li>\u5F17\u66FC\u5B66\u4E60\u6CD5\u3002</li><li>\u6CE8\u610F\u6548\u7387\uFF0C\u901F\u5EA6\u8981\u5FEB\u3002</li><li>\u6CE8\u610F\u5C06\u7406\u8BBA\u77E5\u8BC6\uFF0C\u7528\u4EE3\u7801\u5B9E\u8DF5\u3002</li><li>\u6BCF\u65E5\u6BCF\u5468\u6BCF\u6708\u521D\uFF0C\u89C4\u5212\u5B66\u4E60\u7684\u5185\u5BB9\u3002</li><li>\u7ED9\u9700\u8981\u5B66\u4E60\u7684\u5185\u5BB9\u6E05\u695A\u969C\u788D\uFF0C\u4E13\u6CE8\u5230\u4E00\u5757\u5185\u5BB9\u4E0A\uFF0C\u5E76\u4FDD\u8BC1\u5B66\u4E60\u7684\u8FDE\u7EED\u6027\u3002</li><li>\u591A\u8054\u60F3\u76F8\u5173\u7684\u77E5\u8BC6\u70B9\uFF0C\u63D0\u9AD8\u77E5\u8BC6\u8FC1\u79FB\u80FD\u529B\u3002</li><li>\u52E4\u505A\u7B14\u8BB0\uFF0C\u6CE8\u610F\u603B\u7ED3\u548C\u56DE\u987E\u3002</li></ul><h3 id="\u5FC3\u6001\u7684\u5EFA\u8BAE" tabindex="-1"><a class="header-anchor" href="#\u5FC3\u6001\u7684\u5EFA\u8BAE" aria-hidden="true">#</a> \u5FC3\u6001\u7684\u5EFA\u8BAE</h3><ul><li>\u8981\u8B66\u60D5\u7F51\u4E0A\u6216\u8005\u8EAB\u8FB9\u4EBA\u6240\u8D29\u5356\u7684\u7126\u8651\u3002</li><li>\u53D6\u5F97\u8FDB\u6B65\u9700\u8981\u6BCF\u5929\u524D\u8FDB\u5728\u6B63\u786E\u7684\u65B9\u5411\uFF0C\u5E76\u4E14\u5C3D\u81EA\u5DF1\u6700\u5927\u7684\u52AA\u529B\u3002</li><li>\u5BF9\u5F85\u81EA\u8EAB\u73B0\u72B6\u8981\u5B9E\u4E8B\u6C42\u662F\u3002\u73B0\u5728\u5B9E\u529B\u4E0D\u591F\u4E5F\u4E0D\u7528\u7070\u5FC3\uFF0C\u53EA\u80FD\u8BF4\u660E\u8FD8\u6CA1\u5230\u6700\u540E\uFF0C\u6700\u540E\u90FD\u4F1A\u6709\u5149\u660E\u7684\u672A\u6765\u3002</li><li>\u5FC3\u6025\u5403\u4E0D\u4E86\u70ED\u8C46\u8150\uFF0C\u4E00\u6B65\u4E00\u4E2A\u811A\u5370\uFF0C\u8E0F\u8E0F\u5B9E\u5B9E\u5730\u505A\u4E8B\u3002</li></ul><h3 id="\u5173\u4E8E\u8BFB\u7814" tabindex="-1"><a class="header-anchor" href="#\u5173\u4E8E\u8BFB\u7814" aria-hidden="true">#</a> \u5173\u4E8E\u8BFB\u7814</h3><p>\u6211\u672C\u4EBA\u662F\u5F3A\u70C8\u63A8\u8350\u5404\u4F4D\u672C\u79D1\u540C\u5B66\u8BFB\u7814\u3002</p><blockquote><p>\u4E3A\u4EC0\u4E48\u5462\uFF1F</p></blockquote><ul><li><strong>\u8BFB\u7814\u671F\u95F4\u4F1A\u6709\u5927\u91CF\u7684\u65F6\u95F4</strong> \uFF1A\u4E2A\u4EBA\u8BA4\u4E3A\uFF0C\u50CF\u6211\u4E00\u6837\u7684\u591A\u6570\u540C\u5B66\uFF0C\u5728\u7ECF\u5386\u4EE5\u9AD8\u8003\u5206\u6570\u4E3A\u76EE\u6807\u7684\u5E94\u8BD5\u6559\u80B2\u540E\uFF0C\u672C\u79D1\u9636\u6BB5\u9762\u5BF9\u5168\u65B0\u7684\u4E13\u4E1A\u77E5\u8BC6\u548C\u5B66\u4E60\u73AF\u5883\uFF0C\u4EE5\u53CA\u6765\u81EA\u4E92\u8054\u7F51\u548C\u8EAB\u8FB9\u5404\u79CD\u4FE1\u606F\uFF0C\u611F\u5230\u81EA\u7531\u4E14\u8FF7\u832B\u3002\u8FD9\u5F88\u6B63\u5E38\uFF0C\u6211\u4EEC\u9700\u8981\u7684\u662F\u65F6\u95F4\u53BB\u627E\u5230\u5408\u9002\u7684\u65B9\u5411\uFF0C\u5F62\u6210\u6709\u6548\u7684\u5B66\u4E60\u65B9\u6CD5\u3002</li><li><strong>\u66F4\u591A\u7684\u673A\u4F1A</strong> \uFF1A\u8003\u7814\u6709\u673A\u4F1A\u8FDB\u5165\u66F4\u597D\u7684\u5B66\u6821\uFF0C\u9009\u62E9\u66F4\u9002\u5408\u7684\u4E13\u4E1A\u3002\u773C\u754C\u7684\u63D0\u5347\uFF0C\u7ED3\u4EA4\u66F4\u4F18\u8D28\u7684\u4EBA\u8109\u4E5F\u5F88\u91CD\u8981\uFF0C\u63D0\u9AD8\u672A\u6765\u53D1\u5C55\u7684\u4E0A\u9650\u3002\u597D\u7684\u5BFC\u5E08\u80FD\u591F\u63D0\u4F9B\u597D\u7684\u7814\u7A76\u65B9\u5411\uFF0C\u597D\u7684\u9879\u76EE\uFF0C\u5E2E\u52A9\u6307\u5BFC\u79D1\u7814\u3002\u751A\u81F3\u80FD\u63A8\u8350\u5DE5\u4F5C\u548C\u8BFB\u535A\u6DF1\u9020\u3002</li><li><strong>\u7B80\u5386\u52A0\u5206</strong> \uFF1A\u4E92\u8054\u7F51\u884C\u4E1A\u7684\u53D1\u5C55\u901F\u5EA6\u5728\u51CF\u7F13\uFF0C\u4F46\u4ECE\u4E1A\u4EBA\u5458\u589E\u901F\u4F9D\u65E7\uFF0C\u610F\u5473\u7740\u66F4\u52A0\u6FC0\u70C8\u7684\u7ADE\u4E89\u3002\u66F4\u9AD8\u7684\u5B66\u5386\uFF0C\u66F4\u5F3A\u7684\u4E13\u4E1A\u80FD\u529B\uFF0C\u5DF2\u7ECF\u6210\u4E3A\u4F01\u4E1A\u5BF9\u5019\u9009\u4EBA\u7684\u8981\u6C42\u3002</li><li><strong>\u79D1\u7814\u5185\u5BB9\u5BF9\u80FD\u529B\u7684\u57F9\u517B</strong> : \u79D1\u7814\u4E3B\u8981\u662F\u5BF9\u7B97\u6CD5\u7684\u5B66\u4E60\u548C\u521B\u65B0\uFF0C\u80FD\u57F9\u517B\u8BBE\u8BA1\u80FD\u529B\u3002\u5BF9\u4E8E\u8BBA\u6587\u7684\u7814\u7A76\uFF0C\u57F9\u517B\u7406\u89E3\u80FD\u529B\u548C\u5916\u6587\u7684\u9605\u8BFB\u80FD\u529B\u3002\u8FD9\u4E9B\u80FD\u529B\u90FD\u6709\u52A9\u4E8E\u672A\u6765\uFF0C\u628A\u5DE5\u4F5C\u505A\u5F97\u66F4\u52A0\u51FA\u8272\u3002</li></ul><p>\u4E8C\u54E5 : \u6BD4\u8F83\u4E2D\u80AF\u7684\u5EFA\u8BAE\uFF01\u4E0D\u8FC7\uFF0C\u4E5F\u4E0D\u8981\u5FFD\u7565\u4E0D\u8BFB\u7814\u5E26\u6765\u7684\u51E0\u5E74\u5DE5\u4F5C\u7ECF\u9A8C\u5BF9\u81EA\u5DF1\u7684\u6536\u76CA\u3002\u662F\u5426\u8BFB\u7814\uFF0C\u6839\u636E\u81EA\u8EAB\u60C5\u51B5\u505A\u9009\u62E9\u5373\u53EF\uFF01</p><h3 id="\u603B\u7ED3" tabindex="-1"><a class="header-anchor" href="#\u603B\u7ED3" aria-hidden="true">#</a> \u603B\u7ED3</h3><p>\u4E0D\u5FD8\u521D\u5FC3\uFF0C\u7825\u783A\u524D\u884C\u3002\u613F\u5927\u5BB6\u5B66\u4E1A\u8FDB\u6B65\u3002\u795D\u5404\u4F4D\u79CB\u62DB\u53D6\u5F97\u597D\u6210\u7EE9!</p><hr><p><em>\u6CA1\u6709\u4EC0\u4E48\u4F7F\u6211\u505C\u7559\u2014\u2014\u9664\u4E86\u76EE\u7684\uFF0C\u7EB5\u7136\u5CB8\u65C1\u6709\u73AB\u7470\u3001\u6709\u7EFF\u836B\u3001\u6709\u5B81\u9759\u7684\u6E2F\u6E7E\uFF0C\u6211\u662F\u4E0D\u7CFB\u4E4B\u821F</em>\u3002</p>',49),_=a("\u8F6C\u8F7D\u94FE\u63A5\uFF1A"),f={href:"https://mp.weixin.qq.com/s/EB_NCC2fNyYHuz04k1H4Nw",target:"_blank",rel:"noopener noreferrer"},m=a("https://mp.weixin.qq.com/s/EB_NCC2fNyYHuz04k1H4Nw"),g=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png",alt:""})],-1);function k(v,q){const t=r("ExternalLinkIcon");return p(),n("div",null,[s,e("p",null,[h,e("a",d,[u,o(t)])]),b,e("p",null,[_,e("a",f,[m,o(t)])]),g])}var C=i(c,[["render",k],["__file","shanganaliyun.html.vue"]]);export{C as default};
diff --git a/dist/assets/shangtou.html.fc7b3e84.js b/dist/assets/shangtou.html.d25e4bab.js
similarity index 99%
rename from dist/assets/shangtou.html.fc7b3e84.js
rename to dist/assets/shangtou.html.d25e4bab.js
index accd9a2b..6b061468 100644
--- a/dist/assets/shangtou.html.fc7b3e84.js
+++ b/dist/assets/shangtou.html.d25e4bab.js
@@ -1,4 +1,4 @@
-import{_ as p}from"./plugin-vue_export-helper.21dcd24c.js";import{r as e,o,c,a as n,b as u,e as s,d as a}from"./app.a0271b9c.js";const l={},i=s('<h1 id="java-io\u5B66\u4E60\u6574\u7406" tabindex="-1"><a class="header-anchor" href="#java-io\u5B66\u4E60\u6574\u7406" aria-hidden="true">#</a> Java IO\u5B66\u4E60\u6574\u7406</h1><p>\u201C\u8001\u738B\uFF0CJava IO \u4E5F\u592A\u4E0A\u5934\u4E86\u5427\uFF1F\u201D\u65B0\u5175\u86CB\u5B50\u5C0F\u4E8C\u5411\u5934\u9876\u5F88\u51C9\u5FEB\u7684\u8001\u738B\u62B1\u6028\u9053\uFF0C\u201C\u4F60\u77A7\uFF0C\u6211\u5C31\u6309\u7167\u4F20\u8F93\u65B9\u5F0F\u5BF9 IO \u8FDB\u884C\u4E86\u4E00\u4E2A\u7B80\u5355\u7684\u5206\u7C7B\uFF0C\u5C31\u80FD\u641E\u51FA\u6765\u8FD9\u4E48\u591A\u7684\u73A9\u610F\uFF01\u201D</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/shangtou-01.png" alt=""></p><p>\u597D\u4E45\u6CA1\u641E\u8FC7 IO \u4E86\uFF0C\u8001\u738B\u770B\u5230\u8FD9\u5E45\u601D\u7EF4\u5BFC\u56FE\u4E5F\u662F\u5403\u4E86\u4E00\u60CA\u3002\u60F3\u60F3\u4E5F\u662F\uFF0C\u4ED6\u5F53\u521D\u5B66\u4E60 Java IO \u7684\u65F6\u5019\u5934\u4E5F\u5927\uFF0C\u4E4C\u592E\u4E4C\u592E\u7684\u4E00\u7247\uFF0C\u5168\u662F\u7C7B\uFF0C\u4F30\u8BA1\u662F\u6240\u6709 Java \u5305\u91CC\u9762\u7C7B\u6700\u591A\u7684\uFF0C\u4E00\u4F1A\u662F Input \u4E00\u4F1A\u662F Output\uFF0C\u4E00\u4F1A\u662F Reader \u4E00\u4F1A\u662F Writer\uFF0C\u771F\u4E0D\u77E5\u9053 Java \u7684\u8BBE\u8BA1\u8005\u662F\u600E\u4E48\u60F3\u7684\u3002</p><p>\u770B\u7740\u80BA\u90FD\u5FEB\u8981\u6C14\u70B8\u7684\u5C0F\u4E8C\uFF0C\u8001\u738B\u6DF1\u6DF1\u5730\u5438\u4E86\u4E00\u53E3\u6C14\uFF0C\u8010\u5FC3\u5730\u5BF9\u5C0F\u4E8C\u8BF4\uFF1A\u201C\u4E3B\u8981\u662F Java \u7684\u8BBE\u8BA1\u8005\u8003\u8651\u5F97\u6BD4\u8F83\u591A\u5427\uFF0C\u6240\u4EE5 IO \u7ED9\u4EBA\u4E00\u79CD\u5F88\u4E71\u7684\u611F\u89C9\uFF0C\u6211\u6765\u7ED9\u4F60\u68B3\u7406\u4E00\u4E0B\u3002\u201D</p><h3 id="_01\u3001\u4F20\u8F93\u65B9\u5F0F\u5212\u5206" tabindex="-1"><a class="header-anchor" href="#_01\u3001\u4F20\u8F93\u65B9\u5F0F\u5212\u5206" aria-hidden="true">#</a> 01\u3001\u4F20\u8F93\u65B9\u5F0F\u5212\u5206</h3><p>\u5C31\u6309\u7167\u4F60\u7684\u90A3\u526F\u601D\u7EF4\u5BFC\u56FE\u6765\u8BF4\u5427\u3002</p><p>\u4F20\u8F93\u65B9\u5F0F\u6709\u4E24\u79CD\uFF0C\u5B57\u8282\u548C\u5B57\u7B26\uFF0C\u90A3\u9996\u5148\u5F97\u641E\u660E\u767D\u5B57\u8282\u548C\u5B57\u7B26\u6709\u4EC0\u4E48\u533A\u522B\uFF0C\u5BF9\u5427\uFF1F</p><p>\u5B57\u8282\uFF08byte\uFF09\u662F\u8BA1\u7B97\u673A\u4E2D\u7528\u6765\u8868\u793A\u5B58\u50A8\u5BB9\u91CF\u7684\u4E00\u4E2A\u8BA1\u91CF\u5355\u4F4D\uFF0C\u901A\u5E38\u60C5\u51B5\u4E0B\uFF0C\u4E00\u4E2A\u5B57\u8282\u6709 8 \u4F4D\uFF08bit\uFF09\u3002</p><p>\u5B57\u7B26\uFF08char\uFF09\u53EF\u4EE5\u662F\u8BA1\u7B97\u673A\u4E2D\u4F7F\u7528\u7684\u5B57\u6BCD\u3001\u6570\u5B57\u3001\u548C\u7B26\u53F7\uFF0C\u6BD4\u5982\u8BF4 A 1 $ \u8FD9\u4E9B\u3002</p><p>\u901A\u5E38\u6765\u8BF4\uFF0C\u4E00\u4E2A\u5B57\u6BCD\u6216\u8005\u4E00\u4E2A\u5B57\u7B26\u5360\u7528\u4E00\u4E2A\u5B57\u8282\uFF0C\u4E00\u4E2A\u6C49\u5B57\u5360\u7528\u4E24\u4E2A\u5B57\u8282\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/shangtou-02.png" alt=""></p><p>\u5177\u4F53\u8FD8\u8981\u770B\u5B57\u7B26\u7F16\u7801\uFF0C\u6BD4\u5982\u8BF4\u5728 UTF-8 \u7F16\u7801\u4E0B\uFF0C\u4E00\u4E2A\u82F1\u6587\u5B57\u6BCD\uFF08\u4E0D\u5206\u5927\u5C0F\u5199\uFF09\u4E3A\u4E00\u4E2A\u5B57\u8282\uFF0C\u4E00\u4E2A\u4E2D\u6587\u6C49\u5B57\u4E3A\u4E09\u4E2A\u5B57\u8282\uFF1B\u5728 Unicode \u7F16\u7801\u4E2D\uFF0C\u4E00\u4E2A\u82F1\u6587\u5B57\u6BCD\u4E3A\u4E00\u4E2A\u5B57\u8282\uFF0C\u4E00\u4E2A\u4E2D\u6587\u6C49\u5B57\u4E3A\u4E24\u4E2A\u5B57\u8282\u3002</p>',13),k=a("PS\uFF1A\u5173\u4E8E\u5B57\u7B26\u7F16\u7801\uFF0C\u53EF\u4EE5\u770B\u524D\u9762\u7684\u7AE0\u8282\uFF1A"),r={href:"https://mp.weixin.qq.com/s/pNQjlXOivIgO3pbYc0GnpA",target:"_blank",rel:"noopener noreferrer"},d=a("\u951F\u65A4\u62F7"),v=s(`<p>\u660E\u767D\u4E86\u5B57\u8282\u4E0E\u5B57\u7B26\u7684\u533A\u522B\uFF0C\u518D\u6765\u770B\u5B57\u8282\u6D41\u548C\u5B57\u7B26\u6D41\u5C31\u4F1A\u8F7B\u677E\u591A\u4E86\u3002</p><p>\u5B57\u8282\u6D41\u7528\u6765\u5904\u7406\u4E8C\u8FDB\u5236\u6587\u4EF6\uFF0C\u6BD4\u5982\u8BF4\u56FE\u7247\u554A\u3001MP3 \u554A\u3001\u89C6\u9891\u554A\u3002</p><p>\u5B57\u7B26\u6D41\u7528\u6765\u5904\u7406\u6587\u672C\u6587\u4EF6\uFF0C\u6587\u672C\u6587\u4EF6\u53EF\u4EE5\u770B\u4F5C\u662F\u4E00\u79CD\u7279\u6B8A\u7684\u4E8C\u8FDB\u5236\u6587\u4EF6\uFF0C\u53EA\u4E0D\u8FC7\u7ECF\u8FC7\u4E86\u7F16\u7801\uFF0C\u4FBF\u4E8E\u4EBA\u4EEC\u9605\u8BFB\u3002</p><p>\u6362\u53E5\u8BDD\u8BF4\u5C31\u662F\uFF0C\u5B57\u8282\u6D41\u53EF\u4EE5\u5904\u7406\u4E00\u5207\u6587\u4EF6\uFF0C\u800C\u5B57\u7B26\u6D41\u53EA\u80FD\u5904\u7406\u6587\u672C\u3002</p><p>\u867D\u7136 IO \u7C7B\u5F88\u591A\uFF0C\u4F46\u6838\u5FC3\u7684\u5C31\u662F 4 \u4E2A\u62BD\u8C61\u7C7B\uFF1AInputStream\u3001OutputStream\u3001Reader\u3001Writer\u3002</p><p>\uFF08<strong>\u62BD\u8C61\u5927\u6CD5\u771F\u597D</strong>\uFF09</p><p>\u867D\u7136 IO \u7C7B\u7684\u65B9\u6CD5\u4E5F\u5F88\u591A\uFF0C\u4F46\u6838\u5FC3\u7684\u4E5F\u5C31 2 \u4E2A\uFF1Aread \u548C write\u3002</p><p><strong>InputStream \u7C7B</strong></p><ul><li><code>int read()</code>\uFF1A\u8BFB\u53D6\u6570\u636E</li><li><code>int read(byte b[], int off, int len)</code>\uFF1A\u4ECE\u7B2C off \u4F4D\u7F6E\u5F00\u59CB\u8BFB\uFF0C\u8BFB\u53D6 len \u957F\u5EA6\u7684\u5B57\u8282\uFF0C\u7136\u540E\u653E\u5165\u6570\u7EC4 b \u4E2D</li><li><code>long skip(long n)</code>\uFF1A\u8DF3\u8FC7\u6307\u5B9A\u4E2A\u6570\u7684\u5B57\u8282</li><li><code>int available()</code>\uFF1A\u8FD4\u56DE\u53EF\u8BFB\u7684\u5B57\u8282\u6570</li><li><code>void close()</code>\uFF1A\u5173\u95ED\u6D41\uFF0C\u91CA\u653E\u8D44\u6E90</li></ul><p><strong>OutputStream \u7C7B</strong></p><ul><li><code>void write(int b)</code>\uFF1A \u5199\u5165\u4E00\u4E2A\u5B57\u8282\uFF0C\u867D\u7136\u53C2\u6570\u662F\u4E00\u4E2A int \u7C7B\u578B\uFF0C\u4F46\u53EA\u6709\u4F4E 8 \u4F4D\u624D\u4F1A\u5199\u5165\uFF0C\u9AD8 24 \u4F4D\u4F1A\u820D\u5F03\uFF08\u8FD9\u5757\u540E\u9762\u518D\u8BB2\uFF09</li><li><code>void write(byte b[], int off, int len)</code>\uFF1A \u5C06\u6570\u7EC4 b \u4E2D\u7684\u4ECE off \u4F4D\u7F6E\u5F00\u59CB\uFF0C\u957F\u5EA6\u4E3A len \u7684\u5B57\u8282\u5199\u5165</li><li><code>void flush()</code>\uFF1A \u5F3A\u5236\u5237\u65B0\uFF0C\u5C06\u7F13\u51B2\u533A\u7684\u6570\u636E\u5199\u5165</li><li><code>void close()</code>\uFF1A\u5173\u95ED\u6D41</li></ul><p><strong>Reader \u7C7B</strong></p><ul><li><code>int read()</code>\uFF1A\u8BFB\u53D6\u5355\u4E2A\u5B57\u7B26</li><li><code>int read(char cbuf[], int off, int len)</code>\uFF1A\u4ECE\u7B2C off \u4F4D\u7F6E\u5F00\u59CB\u8BFB\uFF0C\u8BFB\u53D6 len \u957F\u5EA6\u7684\u5B57\u7B26\uFF0C\u7136\u540E\u653E\u5165\u6570\u7EC4 b \u4E2D</li><li><code>long skip(long n)</code>\uFF1A\u8DF3\u8FC7\u6307\u5B9A\u4E2A\u6570\u7684\u5B57\u7B26</li><li><code>int ready()</code>\uFF1A\u662F\u5426\u53EF\u4EE5\u8BFB\u4E86</li><li><code>void close()</code>\uFF1A\u5173\u95ED\u6D41\uFF0C\u91CA\u653E\u8D44\u6E90</li></ul><p><strong>Writer \u7C7B</strong></p><ul><li><code>void write(int c)</code>\uFF1A \u5199\u5165\u4E00\u4E2A\u5B57\u7B26</li><li><code>void write( char cbuf[], int off, int len)</code>\uFF1A \u5C06\u6570\u7EC4 cbuf \u4E2D\u7684\u4ECE off \u4F4D\u7F6E\u5F00\u59CB\uFF0C\u957F\u5EA6\u4E3A len \u7684\u5B57\u7B26\u5199\u5165</li><li><code>void flush()</code>\uFF1A \u5F3A\u5236\u5237\u65B0\uFF0C\u5C06\u7F13\u51B2\u533A\u7684\u6570\u636E\u5199\u5165</li><li><code>void close()</code>\uFF1A\u5173\u95ED\u6D41</li></ul><p>\u7406\u89E3\u4E86\u4E0A\u9762\u8FD9\u4E9B\u65B9\u6CD5\uFF0C\u57FA\u672C\u4E0A IO \u7684\u7075\u9B42\u4E5F\u5C31\u5168\u90E8\u638C\u63E1\u4E86\u3002</p><h3 id="_02\u3001\u64CD\u4F5C\u5BF9\u8C61\u5212\u5206" tabindex="-1"><a class="header-anchor" href="#_02\u3001\u64CD\u4F5C\u5BF9\u8C61\u5212\u5206" aria-hidden="true">#</a> 02\u3001\u64CD\u4F5C\u5BF9\u8C61\u5212\u5206</h3><p>\u5C0F\u4E8C\uFF0C\u4F60\u7EC6\u60F3\u4E00\u4E0B\uFF0CIO IO\uFF0C\u4E0D\u5C31\u662F\u8F93\u5165\u8F93\u51FA\uFF08Input/Output\uFF09\u561B\uFF1A</p><ul><li>Input\uFF1A\u5C06\u5916\u90E8\u7684\u6570\u636E\u8BFB\u5165\u5185\u5B58\uFF0C\u6BD4\u5982\u8BF4\u628A\u6587\u4EF6\u4ECE\u786C\u76D8\u8BFB\u53D6\u5230\u5185\u5B58\uFF0C\u4ECE\u7F51\u7EDC\u8BFB\u53D6\u6570\u636E\u5230\u5185\u5B58\u7B49\u7B49</li><li>Output\uFF1A\u5C06\u5185\u5B58\u4E2D\u7684\u6570\u636E\u5199\u5165\u5230\u5916\u90E8\uFF0C\u6BD4\u5982\u8BF4\u628A\u6570\u636E\u4ECE\u5185\u5B58\u5199\u5165\u5230\u6587\u4EF6\uFF0C\u628A\u6570\u636E\u4ECE\u5185\u5B58\u8F93\u51FA\u5230\u7F51\u7EDC\u7B49\u7B49\u3002</li></ul><p>\u6240\u6709\u7684\u7A0B\u5E8F\uFF0C\u5728\u6267\u884C\u7684\u65F6\u5019\uFF0C\u90FD\u662F\u5728\u5185\u5B58\u4E0A\u8FDB\u884C\u7684\uFF0C\u4E00\u65E6\u5173\u673A\uFF0C\u5185\u5B58\u4E2D\u7684\u6570\u636E\u5C31\u6CA1\u4E86\uFF0C\u90A3\u5982\u679C\u60F3\u8981\u6301\u4E45\u5316\uFF0C\u5C31\u9700\u8981\u628A\u5185\u5B58\u4E2D\u7684\u6570\u636E\u8F93\u51FA\u5230\u5916\u90E8\uFF0C\u6BD4\u5982\u8BF4\u6587\u4EF6\u3002</p><p>\u6587\u4EF6\u64CD\u4F5C\u7B97\u662F IO \u4E2D\u6700\u5178\u578B\u7684\u64CD\u4F5C\u4E86\uFF0C\u4E5F\u662F\u6700\u9891\u7E41\u7684\u64CD\u4F5C\u3002\u90A3\u5176\u5B9E\u4F60\u53EF\u4EE5\u6362\u4E2A\u89D2\u5EA6\u6765\u601D\u8003\uFF0C\u6BD4\u5982\u8BF4\u6309\u7167 IO \u7684\u64CD\u4F5C\u5BF9\u8C61\u6765\u601D\u8003\uFF0CIO \u5C31\u53EF\u4EE5\u5206\u7C7B\u4E3A\uFF1A\u6587\u4EF6\u3001\u6570\u7EC4\u3001\u7BA1\u9053\u3001\u57FA\u672C\u6570\u636E\u7C7B\u578B\u3001\u7F13\u51B2\u3001\u6253\u5370\u3001\u5BF9\u8C61\u5E8F\u5217\u5316/\u53CD\u5E8F\u5217\u5316\uFF0C\u4EE5\u53CA\u8F6C\u6362\u7B49\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/shangtou-03.png" alt=""></p><p><strong>1\uFF09\u6587\u4EF6</strong></p><p>\u6587\u4EF6\u6D41\u4E5F\u5C31\u662F\u76F4\u63A5\u64CD\u4F5C\u6587\u4EF6\u7684\u6D41\uFF0C\u53EF\u4EE5\u7EC6\u5206\u4E3A\u5B57\u8282\u6D41\uFF08FileInputStream \u548C FileOuputStream\uFF09\u548C\u5B57\u7B26\u6D41\uFF08FileReader \u548C FileWriter\uFF09\u3002</p><p>FileInputStream \u7684\u4F8B\u5B50\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">int</span> b<span class="token punctuation">;</span>
+import{_ as p}from"./plugin-vue_export-helper.21dcd24c.js";import{r as e,o,c,a as n,b as u,e as s,d as a}from"./app.615e41d8.js";const l={},i=s('<h1 id="java-io\u5B66\u4E60\u6574\u7406" tabindex="-1"><a class="header-anchor" href="#java-io\u5B66\u4E60\u6574\u7406" aria-hidden="true">#</a> Java IO\u5B66\u4E60\u6574\u7406</h1><p>\u201C\u8001\u738B\uFF0CJava IO \u4E5F\u592A\u4E0A\u5934\u4E86\u5427\uFF1F\u201D\u65B0\u5175\u86CB\u5B50\u5C0F\u4E8C\u5411\u5934\u9876\u5F88\u51C9\u5FEB\u7684\u8001\u738B\u62B1\u6028\u9053\uFF0C\u201C\u4F60\u77A7\uFF0C\u6211\u5C31\u6309\u7167\u4F20\u8F93\u65B9\u5F0F\u5BF9 IO \u8FDB\u884C\u4E86\u4E00\u4E2A\u7B80\u5355\u7684\u5206\u7C7B\uFF0C\u5C31\u80FD\u641E\u51FA\u6765\u8FD9\u4E48\u591A\u7684\u73A9\u610F\uFF01\u201D</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/shangtou-01.png" alt=""></p><p>\u597D\u4E45\u6CA1\u641E\u8FC7 IO \u4E86\uFF0C\u8001\u738B\u770B\u5230\u8FD9\u5E45\u601D\u7EF4\u5BFC\u56FE\u4E5F\u662F\u5403\u4E86\u4E00\u60CA\u3002\u60F3\u60F3\u4E5F\u662F\uFF0C\u4ED6\u5F53\u521D\u5B66\u4E60 Java IO \u7684\u65F6\u5019\u5934\u4E5F\u5927\uFF0C\u4E4C\u592E\u4E4C\u592E\u7684\u4E00\u7247\uFF0C\u5168\u662F\u7C7B\uFF0C\u4F30\u8BA1\u662F\u6240\u6709 Java \u5305\u91CC\u9762\u7C7B\u6700\u591A\u7684\uFF0C\u4E00\u4F1A\u662F Input \u4E00\u4F1A\u662F Output\uFF0C\u4E00\u4F1A\u662F Reader \u4E00\u4F1A\u662F Writer\uFF0C\u771F\u4E0D\u77E5\u9053 Java \u7684\u8BBE\u8BA1\u8005\u662F\u600E\u4E48\u60F3\u7684\u3002</p><p>\u770B\u7740\u80BA\u90FD\u5FEB\u8981\u6C14\u70B8\u7684\u5C0F\u4E8C\uFF0C\u8001\u738B\u6DF1\u6DF1\u5730\u5438\u4E86\u4E00\u53E3\u6C14\uFF0C\u8010\u5FC3\u5730\u5BF9\u5C0F\u4E8C\u8BF4\uFF1A\u201C\u4E3B\u8981\u662F Java \u7684\u8BBE\u8BA1\u8005\u8003\u8651\u5F97\u6BD4\u8F83\u591A\u5427\uFF0C\u6240\u4EE5 IO \u7ED9\u4EBA\u4E00\u79CD\u5F88\u4E71\u7684\u611F\u89C9\uFF0C\u6211\u6765\u7ED9\u4F60\u68B3\u7406\u4E00\u4E0B\u3002\u201D</p><h3 id="_01\u3001\u4F20\u8F93\u65B9\u5F0F\u5212\u5206" tabindex="-1"><a class="header-anchor" href="#_01\u3001\u4F20\u8F93\u65B9\u5F0F\u5212\u5206" aria-hidden="true">#</a> 01\u3001\u4F20\u8F93\u65B9\u5F0F\u5212\u5206</h3><p>\u5C31\u6309\u7167\u4F60\u7684\u90A3\u526F\u601D\u7EF4\u5BFC\u56FE\u6765\u8BF4\u5427\u3002</p><p>\u4F20\u8F93\u65B9\u5F0F\u6709\u4E24\u79CD\uFF0C\u5B57\u8282\u548C\u5B57\u7B26\uFF0C\u90A3\u9996\u5148\u5F97\u641E\u660E\u767D\u5B57\u8282\u548C\u5B57\u7B26\u6709\u4EC0\u4E48\u533A\u522B\uFF0C\u5BF9\u5427\uFF1F</p><p>\u5B57\u8282\uFF08byte\uFF09\u662F\u8BA1\u7B97\u673A\u4E2D\u7528\u6765\u8868\u793A\u5B58\u50A8\u5BB9\u91CF\u7684\u4E00\u4E2A\u8BA1\u91CF\u5355\u4F4D\uFF0C\u901A\u5E38\u60C5\u51B5\u4E0B\uFF0C\u4E00\u4E2A\u5B57\u8282\u6709 8 \u4F4D\uFF08bit\uFF09\u3002</p><p>\u5B57\u7B26\uFF08char\uFF09\u53EF\u4EE5\u662F\u8BA1\u7B97\u673A\u4E2D\u4F7F\u7528\u7684\u5B57\u6BCD\u3001\u6570\u5B57\u3001\u548C\u7B26\u53F7\uFF0C\u6BD4\u5982\u8BF4 A 1 $ \u8FD9\u4E9B\u3002</p><p>\u901A\u5E38\u6765\u8BF4\uFF0C\u4E00\u4E2A\u5B57\u6BCD\u6216\u8005\u4E00\u4E2A\u5B57\u7B26\u5360\u7528\u4E00\u4E2A\u5B57\u8282\uFF0C\u4E00\u4E2A\u6C49\u5B57\u5360\u7528\u4E24\u4E2A\u5B57\u8282\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/shangtou-02.png" alt=""></p><p>\u5177\u4F53\u8FD8\u8981\u770B\u5B57\u7B26\u7F16\u7801\uFF0C\u6BD4\u5982\u8BF4\u5728 UTF-8 \u7F16\u7801\u4E0B\uFF0C\u4E00\u4E2A\u82F1\u6587\u5B57\u6BCD\uFF08\u4E0D\u5206\u5927\u5C0F\u5199\uFF09\u4E3A\u4E00\u4E2A\u5B57\u8282\uFF0C\u4E00\u4E2A\u4E2D\u6587\u6C49\u5B57\u4E3A\u4E09\u4E2A\u5B57\u8282\uFF1B\u5728 Unicode \u7F16\u7801\u4E2D\uFF0C\u4E00\u4E2A\u82F1\u6587\u5B57\u6BCD\u4E3A\u4E00\u4E2A\u5B57\u8282\uFF0C\u4E00\u4E2A\u4E2D\u6587\u6C49\u5B57\u4E3A\u4E24\u4E2A\u5B57\u8282\u3002</p>',13),k=a("PS\uFF1A\u5173\u4E8E\u5B57\u7B26\u7F16\u7801\uFF0C\u53EF\u4EE5\u770B\u524D\u9762\u7684\u7AE0\u8282\uFF1A"),r={href:"https://mp.weixin.qq.com/s/pNQjlXOivIgO3pbYc0GnpA",target:"_blank",rel:"noopener noreferrer"},d=a("\u951F\u65A4\u62F7"),v=s(`<p>\u660E\u767D\u4E86\u5B57\u8282\u4E0E\u5B57\u7B26\u7684\u533A\u522B\uFF0C\u518D\u6765\u770B\u5B57\u8282\u6D41\u548C\u5B57\u7B26\u6D41\u5C31\u4F1A\u8F7B\u677E\u591A\u4E86\u3002</p><p>\u5B57\u8282\u6D41\u7528\u6765\u5904\u7406\u4E8C\u8FDB\u5236\u6587\u4EF6\uFF0C\u6BD4\u5982\u8BF4\u56FE\u7247\u554A\u3001MP3 \u554A\u3001\u89C6\u9891\u554A\u3002</p><p>\u5B57\u7B26\u6D41\u7528\u6765\u5904\u7406\u6587\u672C\u6587\u4EF6\uFF0C\u6587\u672C\u6587\u4EF6\u53EF\u4EE5\u770B\u4F5C\u662F\u4E00\u79CD\u7279\u6B8A\u7684\u4E8C\u8FDB\u5236\u6587\u4EF6\uFF0C\u53EA\u4E0D\u8FC7\u7ECF\u8FC7\u4E86\u7F16\u7801\uFF0C\u4FBF\u4E8E\u4EBA\u4EEC\u9605\u8BFB\u3002</p><p>\u6362\u53E5\u8BDD\u8BF4\u5C31\u662F\uFF0C\u5B57\u8282\u6D41\u53EF\u4EE5\u5904\u7406\u4E00\u5207\u6587\u4EF6\uFF0C\u800C\u5B57\u7B26\u6D41\u53EA\u80FD\u5904\u7406\u6587\u672C\u3002</p><p>\u867D\u7136 IO \u7C7B\u5F88\u591A\uFF0C\u4F46\u6838\u5FC3\u7684\u5C31\u662F 4 \u4E2A\u62BD\u8C61\u7C7B\uFF1AInputStream\u3001OutputStream\u3001Reader\u3001Writer\u3002</p><p>\uFF08<strong>\u62BD\u8C61\u5927\u6CD5\u771F\u597D</strong>\uFF09</p><p>\u867D\u7136 IO \u7C7B\u7684\u65B9\u6CD5\u4E5F\u5F88\u591A\uFF0C\u4F46\u6838\u5FC3\u7684\u4E5F\u5C31 2 \u4E2A\uFF1Aread \u548C write\u3002</p><p><strong>InputStream \u7C7B</strong></p><ul><li><code>int read()</code>\uFF1A\u8BFB\u53D6\u6570\u636E</li><li><code>int read(byte b[], int off, int len)</code>\uFF1A\u4ECE\u7B2C off \u4F4D\u7F6E\u5F00\u59CB\u8BFB\uFF0C\u8BFB\u53D6 len \u957F\u5EA6\u7684\u5B57\u8282\uFF0C\u7136\u540E\u653E\u5165\u6570\u7EC4 b \u4E2D</li><li><code>long skip(long n)</code>\uFF1A\u8DF3\u8FC7\u6307\u5B9A\u4E2A\u6570\u7684\u5B57\u8282</li><li><code>int available()</code>\uFF1A\u8FD4\u56DE\u53EF\u8BFB\u7684\u5B57\u8282\u6570</li><li><code>void close()</code>\uFF1A\u5173\u95ED\u6D41\uFF0C\u91CA\u653E\u8D44\u6E90</li></ul><p><strong>OutputStream \u7C7B</strong></p><ul><li><code>void write(int b)</code>\uFF1A \u5199\u5165\u4E00\u4E2A\u5B57\u8282\uFF0C\u867D\u7136\u53C2\u6570\u662F\u4E00\u4E2A int \u7C7B\u578B\uFF0C\u4F46\u53EA\u6709\u4F4E 8 \u4F4D\u624D\u4F1A\u5199\u5165\uFF0C\u9AD8 24 \u4F4D\u4F1A\u820D\u5F03\uFF08\u8FD9\u5757\u540E\u9762\u518D\u8BB2\uFF09</li><li><code>void write(byte b[], int off, int len)</code>\uFF1A \u5C06\u6570\u7EC4 b \u4E2D\u7684\u4ECE off \u4F4D\u7F6E\u5F00\u59CB\uFF0C\u957F\u5EA6\u4E3A len \u7684\u5B57\u8282\u5199\u5165</li><li><code>void flush()</code>\uFF1A \u5F3A\u5236\u5237\u65B0\uFF0C\u5C06\u7F13\u51B2\u533A\u7684\u6570\u636E\u5199\u5165</li><li><code>void close()</code>\uFF1A\u5173\u95ED\u6D41</li></ul><p><strong>Reader \u7C7B</strong></p><ul><li><code>int read()</code>\uFF1A\u8BFB\u53D6\u5355\u4E2A\u5B57\u7B26</li><li><code>int read(char cbuf[], int off, int len)</code>\uFF1A\u4ECE\u7B2C off \u4F4D\u7F6E\u5F00\u59CB\u8BFB\uFF0C\u8BFB\u53D6 len \u957F\u5EA6\u7684\u5B57\u7B26\uFF0C\u7136\u540E\u653E\u5165\u6570\u7EC4 b \u4E2D</li><li><code>long skip(long n)</code>\uFF1A\u8DF3\u8FC7\u6307\u5B9A\u4E2A\u6570\u7684\u5B57\u7B26</li><li><code>int ready()</code>\uFF1A\u662F\u5426\u53EF\u4EE5\u8BFB\u4E86</li><li><code>void close()</code>\uFF1A\u5173\u95ED\u6D41\uFF0C\u91CA\u653E\u8D44\u6E90</li></ul><p><strong>Writer \u7C7B</strong></p><ul><li><code>void write(int c)</code>\uFF1A \u5199\u5165\u4E00\u4E2A\u5B57\u7B26</li><li><code>void write( char cbuf[], int off, int len)</code>\uFF1A \u5C06\u6570\u7EC4 cbuf \u4E2D\u7684\u4ECE off \u4F4D\u7F6E\u5F00\u59CB\uFF0C\u957F\u5EA6\u4E3A len \u7684\u5B57\u7B26\u5199\u5165</li><li><code>void flush()</code>\uFF1A \u5F3A\u5236\u5237\u65B0\uFF0C\u5C06\u7F13\u51B2\u533A\u7684\u6570\u636E\u5199\u5165</li><li><code>void close()</code>\uFF1A\u5173\u95ED\u6D41</li></ul><p>\u7406\u89E3\u4E86\u4E0A\u9762\u8FD9\u4E9B\u65B9\u6CD5\uFF0C\u57FA\u672C\u4E0A IO \u7684\u7075\u9B42\u4E5F\u5C31\u5168\u90E8\u638C\u63E1\u4E86\u3002</p><h3 id="_02\u3001\u64CD\u4F5C\u5BF9\u8C61\u5212\u5206" tabindex="-1"><a class="header-anchor" href="#_02\u3001\u64CD\u4F5C\u5BF9\u8C61\u5212\u5206" aria-hidden="true">#</a> 02\u3001\u64CD\u4F5C\u5BF9\u8C61\u5212\u5206</h3><p>\u5C0F\u4E8C\uFF0C\u4F60\u7EC6\u60F3\u4E00\u4E0B\uFF0CIO IO\uFF0C\u4E0D\u5C31\u662F\u8F93\u5165\u8F93\u51FA\uFF08Input/Output\uFF09\u561B\uFF1A</p><ul><li>Input\uFF1A\u5C06\u5916\u90E8\u7684\u6570\u636E\u8BFB\u5165\u5185\u5B58\uFF0C\u6BD4\u5982\u8BF4\u628A\u6587\u4EF6\u4ECE\u786C\u76D8\u8BFB\u53D6\u5230\u5185\u5B58\uFF0C\u4ECE\u7F51\u7EDC\u8BFB\u53D6\u6570\u636E\u5230\u5185\u5B58\u7B49\u7B49</li><li>Output\uFF1A\u5C06\u5185\u5B58\u4E2D\u7684\u6570\u636E\u5199\u5165\u5230\u5916\u90E8\uFF0C\u6BD4\u5982\u8BF4\u628A\u6570\u636E\u4ECE\u5185\u5B58\u5199\u5165\u5230\u6587\u4EF6\uFF0C\u628A\u6570\u636E\u4ECE\u5185\u5B58\u8F93\u51FA\u5230\u7F51\u7EDC\u7B49\u7B49\u3002</li></ul><p>\u6240\u6709\u7684\u7A0B\u5E8F\uFF0C\u5728\u6267\u884C\u7684\u65F6\u5019\uFF0C\u90FD\u662F\u5728\u5185\u5B58\u4E0A\u8FDB\u884C\u7684\uFF0C\u4E00\u65E6\u5173\u673A\uFF0C\u5185\u5B58\u4E2D\u7684\u6570\u636E\u5C31\u6CA1\u4E86\uFF0C\u90A3\u5982\u679C\u60F3\u8981\u6301\u4E45\u5316\uFF0C\u5C31\u9700\u8981\u628A\u5185\u5B58\u4E2D\u7684\u6570\u636E\u8F93\u51FA\u5230\u5916\u90E8\uFF0C\u6BD4\u5982\u8BF4\u6587\u4EF6\u3002</p><p>\u6587\u4EF6\u64CD\u4F5C\u7B97\u662F IO \u4E2D\u6700\u5178\u578B\u7684\u64CD\u4F5C\u4E86\uFF0C\u4E5F\u662F\u6700\u9891\u7E41\u7684\u64CD\u4F5C\u3002\u90A3\u5176\u5B9E\u4F60\u53EF\u4EE5\u6362\u4E2A\u89D2\u5EA6\u6765\u601D\u8003\uFF0C\u6BD4\u5982\u8BF4\u6309\u7167 IO \u7684\u64CD\u4F5C\u5BF9\u8C61\u6765\u601D\u8003\uFF0CIO \u5C31\u53EF\u4EE5\u5206\u7C7B\u4E3A\uFF1A\u6587\u4EF6\u3001\u6570\u7EC4\u3001\u7BA1\u9053\u3001\u57FA\u672C\u6570\u636E\u7C7B\u578B\u3001\u7F13\u51B2\u3001\u6253\u5370\u3001\u5BF9\u8C61\u5E8F\u5217\u5316/\u53CD\u5E8F\u5217\u5316\uFF0C\u4EE5\u53CA\u8F6C\u6362\u7B49\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/shangtou-03.png" alt=""></p><p><strong>1\uFF09\u6587\u4EF6</strong></p><p>\u6587\u4EF6\u6D41\u4E5F\u5C31\u662F\u76F4\u63A5\u64CD\u4F5C\u6587\u4EF6\u7684\u6D41\uFF0C\u53EF\u4EE5\u7EC6\u5206\u4E3A\u5B57\u8282\u6D41\uFF08FileInputStream \u548C FileOuputStream\uFF09\u548C\u5B57\u7B26\u6D41\uFF08FileReader \u548C FileWriter\uFF09\u3002</p><p>FileInputStream \u7684\u4F8B\u5B50\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">int</span> b<span class="token punctuation">;</span>
 <span class="token class-name">FileInputStream</span> fis1 <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">FileInputStream</span><span class="token punctuation">(</span><span class="token string">&quot;fis.txt&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 <span class="token comment">// \u5FAA\u73AF\u8BFB\u53D6</span>
 <span class="token keyword">while</span> <span class="token punctuation">(</span><span class="token punctuation">(</span>b <span class="token operator">=</span> fis1<span class="token punctuation">.</span><span class="token function">read</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token operator">!=</span><span class="token operator">-</span><span class="token number">1</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
diff --git a/dist/assets/shengchanzhe-xiaofeizhe.html.920a9bd9.js b/dist/assets/shengchanzhe-xiaofeizhe.html.b76e11fd.js
similarity index 99%
rename from dist/assets/shengchanzhe-xiaofeizhe.html.920a9bd9.js
rename to dist/assets/shengchanzhe-xiaofeizhe.html.b76e11fd.js
index 16b5a8b2..f39a955b 100644
--- a/dist/assets/shengchanzhe-xiaofeizhe.html.920a9bd9.js
+++ b/dist/assets/shengchanzhe-xiaofeizhe.html.b76e11fd.js
@@ -1,4 +1,4 @@
-import{_ as t}from"./plugin-vue_export-helper.21dcd24c.js";import{r as e,o,c,a as n,b as a,e as l,d as p}from"./app.a0271b9c.js";const i={},u=l(`<p>\u751F\u4EA7\u8005-\u6D88\u8D39\u8005\u6A21\u5F0F\u662F\u4E00\u4E2A\u5341\u5206\u7ECF\u5178\u7684\u591A\u7EBF\u7A0B\u5E76\u53D1\u534F\u4F5C\u7684\u6A21\u5F0F\uFF0C\u5F04\u61C2\u751F\u4EA7\u8005-\u6D88\u8D39\u8005\u95EE\u9898\u80FD\u591F\u8BA9\u6211\u4EEC\u5BF9\u5E76\u53D1\u7F16\u7A0B\u7684\u7406\u89E3\u52A0\u6DF1\u3002\u6240\u8C13\u751F\u4EA7\u8005-\u6D88\u8D39\u8005\u95EE\u9898\uFF0C\u5B9E\u9645\u4E0A\u4E3B\u8981\u662F\u5305\u542B\u4E86\u4E24\u7C7B\u7EBF\u7A0B\uFF0C\u4E00\u79CD\u662F\u751F\u4EA7\u8005\u7EBF\u7A0B\u7528\u4E8E\u751F\u4EA7\u6570\u636E\uFF0C\u53E6\u4E00\u79CD\u662F\u6D88\u8D39\u8005\u7EBF\u7A0B\u7528\u4E8E\u6D88\u8D39\u6570\u636E\uFF0C\u4E3A\u4E86\u89E3\u8026\u751F\u4EA7\u8005\u548C\u6D88\u8D39\u8005\u7684\u5173\u7CFB\uFF0C\u901A\u5E38\u4F1A\u91C7\u7528\u5171\u4EAB\u7684\u6570\u636E\u533A\u57DF\uFF0C\u5C31\u50CF\u662F\u4E00\u4E2A\u4ED3\u5E93\uFF0C\u751F\u4EA7\u8005\u751F\u4EA7\u6570\u636E\u4E4B\u540E\u76F4\u63A5\u653E\u7F6E\u5728\u5171\u4EAB\u6570\u636E\u533A\u4E2D\uFF0C\u5E76\u4E0D\u9700\u8981\u5173\u5FC3\u6D88\u8D39\u8005\u7684\u884C\u4E3A\uFF1B\u800C\u6D88\u8D39\u8005\u53EA\u9700\u8981\u4ECE\u5171\u4EAB\u6570\u636E\u533A\u4E2D\u53BB\u83B7\u53D6\u6570\u636E\uFF0C\u5C31\u4E0D\u518D\u9700\u8981\u5173\u5FC3\u751F\u4EA7\u8005\u7684\u884C\u4E3A\u3002\u4F46\u662F\uFF0C\u8FD9\u4E2A\u5171\u4EAB\u6570\u636E\u533A\u57DF\u4E2D\u5E94\u8BE5\u5177\u5907\u8FD9\u6837\u7684\u7EBF\u7A0B\u95F4\u5E76\u53D1\u534F\u4F5C\u7684\u529F\u80FD\uFF1A</p><ol><li>\u5982\u679C\u5171\u4EAB\u6570\u636E\u533A\u5DF2\u6EE1\u7684\u8BDD\uFF0C\u963B\u585E\u751F\u4EA7\u8005\u7EE7\u7EED\u751F\u4EA7\u6570\u636E\u653E\u7F6E\u5165\u5185\uFF1B</li><li>\u5982\u679C\u5171\u4EAB\u6570\u636E\u533A\u4E3A\u7A7A\u7684\u8BDD\uFF0C\u963B\u585E\u6D88\u8D39\u8005\u7EE7\u7EED\u6D88\u8D39\u6570\u636E\uFF1B</li></ol><p>\u5728\u5B9E\u73B0\u751F\u4EA7\u8005\u6D88\u8D39\u8005\u95EE\u9898\u65F6\uFF0C\u53EF\u4EE5\u91C7\u7528\u4E09\u79CD\u65B9\u5F0F\uFF1A</p><ol><li><p>\u4F7F\u7528Object\u7684wait/notify\u7684\u6D88\u606F\u901A\u77E5\u673A\u5236\uFF1B</p></li><li><p>\u4F7F\u7528Lock\u7684Condition\u7684await/signal\u7684\u6D88\u606F\u901A\u77E5\u673A\u5236\uFF1B</p></li><li><p>\u4F7F\u7528BlockingQueue\u5B9E\u73B0\u3002\u672C\u6587\u4E3B\u8981\u5C06\u8FD9\u4E09\u79CD\u5B9E\u73B0\u65B9\u5F0F\u8FDB\u884C\u603B\u7ED3\u5F52\u7EB3\u3002</p></li></ol><h2 id="wait-notify\u7684\u6D88\u606F\u901A\u77E5\u673A\u5236" tabindex="-1"><a class="header-anchor" href="#wait-notify\u7684\u6D88\u606F\u901A\u77E5\u673A\u5236" aria-hidden="true">#</a> wait/notify\u7684\u6D88\u606F\u901A\u77E5\u673A\u5236</h2><h3 id="\u9884\u5907\u77E5\u8BC6" tabindex="-1"><a class="header-anchor" href="#\u9884\u5907\u77E5\u8BC6" aria-hidden="true">#</a> \u9884\u5907\u77E5\u8BC6</h3><p>Java \u4E2D\uFF0C\u53EF\u4EE5\u901A\u8FC7\u914D\u5408\u8C03\u7528 Object \u5BF9\u8C61\u7684 wait() \u65B9\u6CD5\u548C notify()\u65B9\u6CD5\u6216 notifyAll() \u65B9\u6CD5\u6765\u5B9E\u73B0\u7EBF\u7A0B\u95F4\u7684\u901A\u4FE1\u3002\u5728\u7EBF\u7A0B\u4E2D\u8C03\u7528 wait() \u65B9\u6CD5\uFF0C\u5C06\u963B\u585E\u5F53\u524D\u7EBF\u7A0B\uFF0C\u76F4\u81F3\u7B49\u5230\u5176\u4ED6\u7EBF\u7A0B\u8C03\u7528\u4E86\u8C03\u7528 notify() \u65B9\u6CD5\u6216 notifyAll() \u65B9\u6CD5\u8FDB\u884C\u901A\u77E5\u4E4B\u540E\uFF0C\u5F53\u524D\u7EBF\u7A0B\u624D\u80FD\u4ECEwait()\u65B9\u6CD5\u51FA\u8FD4\u56DE\uFF0C\u7EE7\u7EED\u6267\u884C\u4E0B\u9762\u7684\u64CD\u4F5C\u3002</p><ol><li><p><strong>wait</strong></p><p>\u8BE5\u65B9\u6CD5\u7528\u6765\u5C06\u5F53\u524D\u7EBF\u7A0B\u7F6E\u5165\u4F11\u7720\u72B6\u6001\uFF0C\u76F4\u5230\u63A5\u5230\u901A\u77E5\u6216\u88AB\u4E2D\u65AD\u4E3A\u6B62\u3002\u5728\u8C03\u7528 wait()\u4E4B\u524D\uFF0C\u7EBF\u7A0B\u5FC5\u987B\u8981\u83B7\u5F97\u8BE5\u5BF9\u8C61\u7684\u5BF9\u8C61\u76D1\u89C6\u5668\u9501\uFF0C\u5373\u53EA\u80FD\u5728<strong>\u540C\u6B65\u65B9\u6CD5\u6216\u540C\u6B65\u5757</strong>\u4E2D\u8C03\u7528 wait()\u65B9\u6CD5\u3002\u8C03\u7528wait()\u65B9\u6CD5\u4E4B\u540E\uFF0C\u5F53\u524D\u7EBF\u7A0B\u4F1A\u91CA\u653E\u9501\u3002\u5982\u679C\u8C03\u7528wait()\u65B9\u6CD5\u65F6\uFF0C\u7EBF\u7A0B\u5E76\u672A\u83B7\u53D6\u5230\u9501\u7684\u8BDD\uFF0C\u5219\u4F1A<strong>\u629B\u51FAIllegalMonitorStateException</strong>\u5F02\u5E38\uFF0C\u8FD9\u662F\u4EE5\u4E2ARuntimeException\u3002\u5982\u679C\u518D\u6B21\u83B7\u53D6\u5230\u9501\u7684\u8BDD\uFF0C\u5F53\u524D\u7EBF\u7A0B\u624D\u80FD\u4ECEwait()\u65B9\u6CD5\u5904\u6210\u529F\u8FD4\u56DE\u3002</p></li><li><p><strong>notify</strong></p><p>\u8BE5\u65B9\u6CD5\u4E5F\u8981\u5728\u540C\u6B65\u65B9\u6CD5\u6216\u540C\u6B65\u5757\u4E2D\u8C03\u7528\uFF0C\u5373\u5728\u8C03\u7528\u524D\uFF0C\u7EBF\u7A0B\u4E5F\u5FC5\u987B\u8981\u83B7\u5F97\u8BE5\u5BF9\u8C61\u7684\u5BF9\u8C61\u7EA7\u522B\u9501\uFF0C\u5982\u679C\u8C03\u7528 notify()\u65F6\u6CA1\u6709\u6301\u6709\u9002\u5F53\u7684\u9501\uFF0C\u4E5F\u4F1A\u629B\u51FA <strong>IllegalMonitorStateException</strong>\u3002 \u8BE5\u65B9\u6CD5\u4EFB\u610F\u4ECEWAITTING\u72B6\u6001\u7684\u7EBF\u7A0B\u4E2D\u6311\u9009\u4E00\u4E2A\u8FDB\u884C\u901A\u77E5\uFF0C\u4F7F\u5F97\u8C03\u7528wait()\u65B9\u6CD5\u7684\u7EBF\u7A0B\u4ECE\u7B49\u5F85\u961F\u5217\u79FB\u5165\u5230\u540C\u6B65\u961F\u5217\u4E2D\uFF0C\u7B49\u5F85\u6709\u673A\u4F1A\u518D\u4E00\u6B21\u83B7\u53D6\u5230\u9501\uFF0C\u4ECE\u800C\u4F7F\u5F97\u8C03\u7528wait()\u65B9\u6CD5\u7684\u7EBF\u7A0B\u80FD\u591F\u4ECEwait()\u65B9\u6CD5\u5904\u9000\u51FA\u3002\u8C03\u7528notify\u540E\uFF0C\u5F53\u524D\u7EBF\u7A0B\u4E0D\u4F1A\u9A6C\u4E0A\u91CA\u653E\u8BE5\u5BF9\u8C61\u9501\uFF0C\u8981\u7B49\u5230\u7A0B\u5E8F\u9000\u51FA\u540C\u6B65\u5757\u540E\uFF0C\u5F53\u524D\u7EBF\u7A0B\u624D\u4F1A\u91CA\u653E\u9501\u3002</p></li><li><p><strong>notifyAll</strong> \u8BE5\u65B9\u6CD5\u4E0E notify ()\u65B9\u6CD5\u7684\u5DE5\u4F5C\u65B9\u5F0F\u76F8\u540C\uFF0C\u91CD\u8981\u7684\u4E00\u70B9\u5DEE\u5F02\u662F\uFF1A notifyAll \u4F7F\u6240\u6709\u539F\u6765\u5728\u8BE5\u5BF9\u8C61\u4E0A wait \u7684\u7EBF\u7A0B\u7EDF\u7EDF\u9000\u51FAWAITTING\u72B6\u6001\uFF0C\u4F7F\u5F97\u4ED6\u4EEC\u5168\u90E8\u4ECE\u7B49\u5F85\u961F\u5217\u4E2D\u79FB\u5165\u5230\u540C\u6B65\u961F\u5217\u4E2D\u53BB\uFF0C\u7B49\u5F85\u4E0B\u4E00\u6B21\u80FD\u591F\u6709\u673A\u4F1A\u83B7\u53D6\u5230\u5BF9\u8C61\u76D1\u89C6\u5668\u9501\u3002</p></li></ol><h3 id="wait-notify\u6D88\u606F\u901A\u77E5\u6F5C\u5728\u7684\u4E00\u4E9B\u95EE\u9898" tabindex="-1"><a class="header-anchor" href="#wait-notify\u6D88\u606F\u901A\u77E5\u6F5C\u5728\u7684\u4E00\u4E9B\u95EE\u9898" aria-hidden="true">#</a> wait/notify\u6D88\u606F\u901A\u77E5\u6F5C\u5728\u7684\u4E00\u4E9B\u95EE\u9898</h3><h4 id="_1-notify\u65E9\u671F\u901A\u77E5" tabindex="-1"><a class="header-anchor" href="#_1-notify\u65E9\u671F\u901A\u77E5" aria-hidden="true">#</a> <strong>1.notify\u65E9\u671F\u901A\u77E5</strong></h4><p>notify \u901A\u77E5\u7684\u9057\u6F0F\u5F88\u5BB9\u6613\u7406\u89E3\uFF0C\u5373 threadA \u8FD8\u6CA1\u5F00\u59CB wait \u7684\u65F6\u5019\uFF0CthreadB \u5DF2\u7ECF notify \u4E86\uFF0C\u8FD9\u6837\uFF0CthreadB \u901A\u77E5\u662F\u6CA1\u6709\u4EFB\u4F55\u54CD\u5E94\u7684\uFF0C\u5F53 threadB \u9000\u51FA synchronized \u4EE3\u7801\u5757\u540E\uFF0CthreadA \u518D\u5F00\u59CB wait\uFF0C\u4FBF\u4F1A\u4E00\u76F4\u963B\u585E\u7B49\u5F85\uFF0C\u76F4\u5230\u88AB\u522B\u7684\u7EBF\u7A0B\u6253\u65AD\u3002\u6BD4\u5982\u5728\u4E0B\u9762\u7684\u793A\u4F8B\u4EE3\u7801\u4E2D\uFF0C\u5C31\u6A21\u62DF\u51FAnotify\u65E9\u671F\u901A\u77E5\u5E26\u6765\u7684\u95EE\u9898\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">EarlyNotify</span> <span class="token punctuation">{</span>
+import{_ as t}from"./plugin-vue_export-helper.21dcd24c.js";import{r as e,o,c,a as n,b as a,e as l,d as p}from"./app.615e41d8.js";const i={},u=l(`<p>\u751F\u4EA7\u8005-\u6D88\u8D39\u8005\u6A21\u5F0F\u662F\u4E00\u4E2A\u5341\u5206\u7ECF\u5178\u7684\u591A\u7EBF\u7A0B\u5E76\u53D1\u534F\u4F5C\u7684\u6A21\u5F0F\uFF0C\u5F04\u61C2\u751F\u4EA7\u8005-\u6D88\u8D39\u8005\u95EE\u9898\u80FD\u591F\u8BA9\u6211\u4EEC\u5BF9\u5E76\u53D1\u7F16\u7A0B\u7684\u7406\u89E3\u52A0\u6DF1\u3002\u6240\u8C13\u751F\u4EA7\u8005-\u6D88\u8D39\u8005\u95EE\u9898\uFF0C\u5B9E\u9645\u4E0A\u4E3B\u8981\u662F\u5305\u542B\u4E86\u4E24\u7C7B\u7EBF\u7A0B\uFF0C\u4E00\u79CD\u662F\u751F\u4EA7\u8005\u7EBF\u7A0B\u7528\u4E8E\u751F\u4EA7\u6570\u636E\uFF0C\u53E6\u4E00\u79CD\u662F\u6D88\u8D39\u8005\u7EBF\u7A0B\u7528\u4E8E\u6D88\u8D39\u6570\u636E\uFF0C\u4E3A\u4E86\u89E3\u8026\u751F\u4EA7\u8005\u548C\u6D88\u8D39\u8005\u7684\u5173\u7CFB\uFF0C\u901A\u5E38\u4F1A\u91C7\u7528\u5171\u4EAB\u7684\u6570\u636E\u533A\u57DF\uFF0C\u5C31\u50CF\u662F\u4E00\u4E2A\u4ED3\u5E93\uFF0C\u751F\u4EA7\u8005\u751F\u4EA7\u6570\u636E\u4E4B\u540E\u76F4\u63A5\u653E\u7F6E\u5728\u5171\u4EAB\u6570\u636E\u533A\u4E2D\uFF0C\u5E76\u4E0D\u9700\u8981\u5173\u5FC3\u6D88\u8D39\u8005\u7684\u884C\u4E3A\uFF1B\u800C\u6D88\u8D39\u8005\u53EA\u9700\u8981\u4ECE\u5171\u4EAB\u6570\u636E\u533A\u4E2D\u53BB\u83B7\u53D6\u6570\u636E\uFF0C\u5C31\u4E0D\u518D\u9700\u8981\u5173\u5FC3\u751F\u4EA7\u8005\u7684\u884C\u4E3A\u3002\u4F46\u662F\uFF0C\u8FD9\u4E2A\u5171\u4EAB\u6570\u636E\u533A\u57DF\u4E2D\u5E94\u8BE5\u5177\u5907\u8FD9\u6837\u7684\u7EBF\u7A0B\u95F4\u5E76\u53D1\u534F\u4F5C\u7684\u529F\u80FD\uFF1A</p><ol><li>\u5982\u679C\u5171\u4EAB\u6570\u636E\u533A\u5DF2\u6EE1\u7684\u8BDD\uFF0C\u963B\u585E\u751F\u4EA7\u8005\u7EE7\u7EED\u751F\u4EA7\u6570\u636E\u653E\u7F6E\u5165\u5185\uFF1B</li><li>\u5982\u679C\u5171\u4EAB\u6570\u636E\u533A\u4E3A\u7A7A\u7684\u8BDD\uFF0C\u963B\u585E\u6D88\u8D39\u8005\u7EE7\u7EED\u6D88\u8D39\u6570\u636E\uFF1B</li></ol><p>\u5728\u5B9E\u73B0\u751F\u4EA7\u8005\u6D88\u8D39\u8005\u95EE\u9898\u65F6\uFF0C\u53EF\u4EE5\u91C7\u7528\u4E09\u79CD\u65B9\u5F0F\uFF1A</p><ol><li><p>\u4F7F\u7528Object\u7684wait/notify\u7684\u6D88\u606F\u901A\u77E5\u673A\u5236\uFF1B</p></li><li><p>\u4F7F\u7528Lock\u7684Condition\u7684await/signal\u7684\u6D88\u606F\u901A\u77E5\u673A\u5236\uFF1B</p></li><li><p>\u4F7F\u7528BlockingQueue\u5B9E\u73B0\u3002\u672C\u6587\u4E3B\u8981\u5C06\u8FD9\u4E09\u79CD\u5B9E\u73B0\u65B9\u5F0F\u8FDB\u884C\u603B\u7ED3\u5F52\u7EB3\u3002</p></li></ol><h2 id="wait-notify\u7684\u6D88\u606F\u901A\u77E5\u673A\u5236" tabindex="-1"><a class="header-anchor" href="#wait-notify\u7684\u6D88\u606F\u901A\u77E5\u673A\u5236" aria-hidden="true">#</a> wait/notify\u7684\u6D88\u606F\u901A\u77E5\u673A\u5236</h2><h3 id="\u9884\u5907\u77E5\u8BC6" tabindex="-1"><a class="header-anchor" href="#\u9884\u5907\u77E5\u8BC6" aria-hidden="true">#</a> \u9884\u5907\u77E5\u8BC6</h3><p>Java \u4E2D\uFF0C\u53EF\u4EE5\u901A\u8FC7\u914D\u5408\u8C03\u7528 Object \u5BF9\u8C61\u7684 wait() \u65B9\u6CD5\u548C notify()\u65B9\u6CD5\u6216 notifyAll() \u65B9\u6CD5\u6765\u5B9E\u73B0\u7EBF\u7A0B\u95F4\u7684\u901A\u4FE1\u3002\u5728\u7EBF\u7A0B\u4E2D\u8C03\u7528 wait() \u65B9\u6CD5\uFF0C\u5C06\u963B\u585E\u5F53\u524D\u7EBF\u7A0B\uFF0C\u76F4\u81F3\u7B49\u5230\u5176\u4ED6\u7EBF\u7A0B\u8C03\u7528\u4E86\u8C03\u7528 notify() \u65B9\u6CD5\u6216 notifyAll() \u65B9\u6CD5\u8FDB\u884C\u901A\u77E5\u4E4B\u540E\uFF0C\u5F53\u524D\u7EBF\u7A0B\u624D\u80FD\u4ECEwait()\u65B9\u6CD5\u51FA\u8FD4\u56DE\uFF0C\u7EE7\u7EED\u6267\u884C\u4E0B\u9762\u7684\u64CD\u4F5C\u3002</p><ol><li><p><strong>wait</strong></p><p>\u8BE5\u65B9\u6CD5\u7528\u6765\u5C06\u5F53\u524D\u7EBF\u7A0B\u7F6E\u5165\u4F11\u7720\u72B6\u6001\uFF0C\u76F4\u5230\u63A5\u5230\u901A\u77E5\u6216\u88AB\u4E2D\u65AD\u4E3A\u6B62\u3002\u5728\u8C03\u7528 wait()\u4E4B\u524D\uFF0C\u7EBF\u7A0B\u5FC5\u987B\u8981\u83B7\u5F97\u8BE5\u5BF9\u8C61\u7684\u5BF9\u8C61\u76D1\u89C6\u5668\u9501\uFF0C\u5373\u53EA\u80FD\u5728<strong>\u540C\u6B65\u65B9\u6CD5\u6216\u540C\u6B65\u5757</strong>\u4E2D\u8C03\u7528 wait()\u65B9\u6CD5\u3002\u8C03\u7528wait()\u65B9\u6CD5\u4E4B\u540E\uFF0C\u5F53\u524D\u7EBF\u7A0B\u4F1A\u91CA\u653E\u9501\u3002\u5982\u679C\u8C03\u7528wait()\u65B9\u6CD5\u65F6\uFF0C\u7EBF\u7A0B\u5E76\u672A\u83B7\u53D6\u5230\u9501\u7684\u8BDD\uFF0C\u5219\u4F1A<strong>\u629B\u51FAIllegalMonitorStateException</strong>\u5F02\u5E38\uFF0C\u8FD9\u662F\u4EE5\u4E2ARuntimeException\u3002\u5982\u679C\u518D\u6B21\u83B7\u53D6\u5230\u9501\u7684\u8BDD\uFF0C\u5F53\u524D\u7EBF\u7A0B\u624D\u80FD\u4ECEwait()\u65B9\u6CD5\u5904\u6210\u529F\u8FD4\u56DE\u3002</p></li><li><p><strong>notify</strong></p><p>\u8BE5\u65B9\u6CD5\u4E5F\u8981\u5728\u540C\u6B65\u65B9\u6CD5\u6216\u540C\u6B65\u5757\u4E2D\u8C03\u7528\uFF0C\u5373\u5728\u8C03\u7528\u524D\uFF0C\u7EBF\u7A0B\u4E5F\u5FC5\u987B\u8981\u83B7\u5F97\u8BE5\u5BF9\u8C61\u7684\u5BF9\u8C61\u7EA7\u522B\u9501\uFF0C\u5982\u679C\u8C03\u7528 notify()\u65F6\u6CA1\u6709\u6301\u6709\u9002\u5F53\u7684\u9501\uFF0C\u4E5F\u4F1A\u629B\u51FA <strong>IllegalMonitorStateException</strong>\u3002 \u8BE5\u65B9\u6CD5\u4EFB\u610F\u4ECEWAITTING\u72B6\u6001\u7684\u7EBF\u7A0B\u4E2D\u6311\u9009\u4E00\u4E2A\u8FDB\u884C\u901A\u77E5\uFF0C\u4F7F\u5F97\u8C03\u7528wait()\u65B9\u6CD5\u7684\u7EBF\u7A0B\u4ECE\u7B49\u5F85\u961F\u5217\u79FB\u5165\u5230\u540C\u6B65\u961F\u5217\u4E2D\uFF0C\u7B49\u5F85\u6709\u673A\u4F1A\u518D\u4E00\u6B21\u83B7\u53D6\u5230\u9501\uFF0C\u4ECE\u800C\u4F7F\u5F97\u8C03\u7528wait()\u65B9\u6CD5\u7684\u7EBF\u7A0B\u80FD\u591F\u4ECEwait()\u65B9\u6CD5\u5904\u9000\u51FA\u3002\u8C03\u7528notify\u540E\uFF0C\u5F53\u524D\u7EBF\u7A0B\u4E0D\u4F1A\u9A6C\u4E0A\u91CA\u653E\u8BE5\u5BF9\u8C61\u9501\uFF0C\u8981\u7B49\u5230\u7A0B\u5E8F\u9000\u51FA\u540C\u6B65\u5757\u540E\uFF0C\u5F53\u524D\u7EBF\u7A0B\u624D\u4F1A\u91CA\u653E\u9501\u3002</p></li><li><p><strong>notifyAll</strong> \u8BE5\u65B9\u6CD5\u4E0E notify ()\u65B9\u6CD5\u7684\u5DE5\u4F5C\u65B9\u5F0F\u76F8\u540C\uFF0C\u91CD\u8981\u7684\u4E00\u70B9\u5DEE\u5F02\u662F\uFF1A notifyAll \u4F7F\u6240\u6709\u539F\u6765\u5728\u8BE5\u5BF9\u8C61\u4E0A wait \u7684\u7EBF\u7A0B\u7EDF\u7EDF\u9000\u51FAWAITTING\u72B6\u6001\uFF0C\u4F7F\u5F97\u4ED6\u4EEC\u5168\u90E8\u4ECE\u7B49\u5F85\u961F\u5217\u4E2D\u79FB\u5165\u5230\u540C\u6B65\u961F\u5217\u4E2D\u53BB\uFF0C\u7B49\u5F85\u4E0B\u4E00\u6B21\u80FD\u591F\u6709\u673A\u4F1A\u83B7\u53D6\u5230\u5BF9\u8C61\u76D1\u89C6\u5668\u9501\u3002</p></li></ol><h3 id="wait-notify\u6D88\u606F\u901A\u77E5\u6F5C\u5728\u7684\u4E00\u4E9B\u95EE\u9898" tabindex="-1"><a class="header-anchor" href="#wait-notify\u6D88\u606F\u901A\u77E5\u6F5C\u5728\u7684\u4E00\u4E9B\u95EE\u9898" aria-hidden="true">#</a> wait/notify\u6D88\u606F\u901A\u77E5\u6F5C\u5728\u7684\u4E00\u4E9B\u95EE\u9898</h3><h4 id="_1-notify\u65E9\u671F\u901A\u77E5" tabindex="-1"><a class="header-anchor" href="#_1-notify\u65E9\u671F\u901A\u77E5" aria-hidden="true">#</a> <strong>1.notify\u65E9\u671F\u901A\u77E5</strong></h4><p>notify \u901A\u77E5\u7684\u9057\u6F0F\u5F88\u5BB9\u6613\u7406\u89E3\uFF0C\u5373 threadA \u8FD8\u6CA1\u5F00\u59CB wait \u7684\u65F6\u5019\uFF0CthreadB \u5DF2\u7ECF notify \u4E86\uFF0C\u8FD9\u6837\uFF0CthreadB \u901A\u77E5\u662F\u6CA1\u6709\u4EFB\u4F55\u54CD\u5E94\u7684\uFF0C\u5F53 threadB \u9000\u51FA synchronized \u4EE3\u7801\u5757\u540E\uFF0CthreadA \u518D\u5F00\u59CB wait\uFF0C\u4FBF\u4F1A\u4E00\u76F4\u963B\u585E\u7B49\u5F85\uFF0C\u76F4\u5230\u88AB\u522B\u7684\u7EBF\u7A0B\u6253\u65AD\u3002\u6BD4\u5982\u5728\u4E0B\u9762\u7684\u793A\u4F8B\u4EE3\u7801\u4E2D\uFF0C\u5C31\u6A21\u62DF\u51FAnotify\u65E9\u671F\u901A\u77E5\u5E26\u6765\u7684\u95EE\u9898\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">EarlyNotify</span> <span class="token punctuation">{</span>
 
     <span class="token keyword">private</span> <span class="token keyword">static</span> <span class="token class-name">String</span> lockObject <span class="token operator">=</span> <span class="token string">&quot;&quot;</span><span class="token punctuation">;</span>
 
diff --git a/dist/assets/shenzhen.html.037e48a5.js b/dist/assets/shenzhen.html.037e48a5.js
deleted file mode 100644
index 6cb7a83c..00000000
--- a/dist/assets/shenzhen.html.037e48a5.js
+++ /dev/null
@@ -1 +0,0 @@
-const t={key:"v-33fa70f5",path:"/cityselect/shenzhen.html",title:"\u6DF1\u5733\u6709\u54EA\u4E9B\u725B\u6279\u7684\u4E92\u8054\u7F51\u516C\u53F8\uFF1F",lang:"zh-CN",frontmatter:{category:["\u6C42\u804C\u9762\u8BD5"],tag:["\u57CE\u5E02\u9009\u62E9"],summary:"\u6DF1\u5733\u6709\u54EA\u4E9B\u725B\u6279\u7684\u4E92\u8054\u7F51\u516C\u53F8\uFF1F \u53C8\u5230\u4E86\u4E00\u5E74\u4E00\u5EA6\u7684\u6C42\u804C\u7B7E\u7EA6\u5B63\uFF0C\u4E00\u4E9B\u5C0F\u4F19\u4F34\u8981\u5F00\u59CB\u5B9A\u5DE5\u4F5C\u4E86\uFF0C\u4EBA\u751F\u7B2C\u4E00\u4EFD\u5DE5\u4F5C\u662F\u975E\u5E38\u91CD\u8981\u7684\uFF0C\u540C\u6837\u5DE5\u4F5C\u7684\u57CE\u5E02\u4E5F\u975E\u5E38\u91CD\u8981\u3002 \u5F88\u591A\u5C0F\u4F19\u4F34\u5E0C\u671B\u5728\u5357\u65B9\u53D1\u5C55\uFF0C\u90A3\uFF0C\u4ECE\u4E8BIT\u6216\u8005\u8F6F\u786C\u4EF6\uFF0C\u6DF1\u5733\u7B97\u662F\u4E00\u4E2A\u4E0D\u9519\u7684\u9009\u62E9\uFF0C \u6240\u4EE5\u8FD9\u91CC\u4E5F\u7ED9\u5927\u5BB6\u6574\u7406\u51FA\u4E00\u4EFD\u8BE6\u7EC6\u7684\u6DF1\u5733\u4E92\u8054\u7F51IT\u516C\u53F8list\uFF0C \u591A\u4E00\u4EFD\u9009\u62E9\u591A\u4E00\u4EFD\u673A\u4F1A\uFF01 \u4E00\u7EBF\u4E92\u8054\u7F51 \u817E\u8BAF\uFF08\u603B\u90E8\u6DF1\u5733\uFF09; \u767E\u5EA6\uFF08\u6DF1\u5733\uFF09; \u963F\u91CC\uFF08\u6DF1\u5733",head:[["meta",{property:"og:url",content:"https://tobebetterjavaer.com/cityselect/shenzhen.html"}],["meta",{property:"og:site_name",content:"Java \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF"}],["meta",{property:"og:title",content:"\u6DF1\u5733\u6709\u54EA\u4E9B\u725B\u6279\u7684\u4E92\u8054\u7F51\u516C\u53F8\uFF1F"}],["meta",{property:"og:type",content:"article"}],["meta",{property:"og:updated_time",content:"2022-05-13T23:14:28.000Z"}],["meta",{property:"og:locale",content:"zh-CN"}],["meta",{property:"article:tag",content:"\u57CE\u5E02\u9009\u62E9"}],["meta",{property:"article:modified_time",content:"2022-05-13T23:14:28.000Z"}]]},excerpt:"",headers:[],git:{createdTime:164837021e4,updatedTime:1652483668e3,contributors:[{name:"itwanger",email:"www.qing_gee@163.com",commits:2}]},readingTime:{minutes:2.41,words:722},filePathRelative:"cityselect/shenzhen.md"};export{t as data};
diff --git a/dist/assets/shenzhen.html.48307e94.js b/dist/assets/shenzhen.html.48307e94.js
deleted file mode 100644
index 5ede3818..00000000
--- a/dist/assets/shenzhen.html.48307e94.js
+++ /dev/null
@@ -1 +0,0 @@
-import{_ as o}from"./plugin-vue_export-helper.21dcd24c.js";import{r as t,o as n,c as a,a as l,b as r,e as s,d as i}from"./app.a0271b9c.js";const p={},c=s('<h1 id="\u6DF1\u5733\u6709\u54EA\u4E9B\u725B\u6279\u7684\u4E92\u8054\u7F51\u516C\u53F8" tabindex="-1"><a class="header-anchor" href="#\u6DF1\u5733\u6709\u54EA\u4E9B\u725B\u6279\u7684\u4E92\u8054\u7F51\u516C\u53F8" aria-hidden="true">#</a> \u6DF1\u5733\u6709\u54EA\u4E9B\u725B\u6279\u7684\u4E92\u8054\u7F51\u516C\u53F8\uFF1F</h1><p>\u53C8\u5230\u4E86\u4E00\u5E74\u4E00\u5EA6\u7684\u6C42\u804C\u7B7E\u7EA6\u5B63\uFF0C\u4E00\u4E9B\u5C0F\u4F19\u4F34\u8981\u5F00\u59CB\u5B9A\u5DE5\u4F5C\u4E86\uFF0C\u4EBA\u751F\u7B2C\u4E00\u4EFD\u5DE5\u4F5C\u662F\u975E\u5E38\u91CD\u8981\u7684\uFF0C\u540C\u6837\u5DE5\u4F5C\u7684\u57CE\u5E02\u4E5F\u975E\u5E38\u91CD\u8981\u3002</p><p>\u5F88\u591A\u5C0F\u4F19\u4F34\u5E0C\u671B\u5728\u5357\u65B9\u53D1\u5C55\uFF0C\u90A3\uFF0C\u4ECE\u4E8BIT\u6216\u8005\u8F6F\u786C\u4EF6\uFF0C\u6DF1\u5733\u7B97\u662F\u4E00\u4E2A\u4E0D\u9519\u7684\u9009\u62E9\uFF0C \u6240\u4EE5\u8FD9\u91CC\u4E5F\u7ED9\u5927\u5BB6\u6574\u7406\u51FA\u4E00\u4EFD\u8BE6\u7EC6\u7684\u6DF1\u5733\u4E92\u8054\u7F51IT\u516C\u53F8list\uFF0C \u591A\u4E00\u4EFD\u9009\u62E9\u591A\u4E00\u4EFD\u673A\u4F1A\uFF01</p><p>\u4E00\u7EBF\u4E92\u8054\u7F51</p><ul><li>\u817E\u8BAF\uFF08\u603B\u90E8\u6DF1\u5733\uFF09</li><li>\u767E\u5EA6\uFF08\u6DF1\u5733\uFF09</li><li>\u963F\u91CC\uFF08\u6DF1\u5733\uFF09</li><li>\u5B57\u8282\u8DF3\u52A8\uFF08\u6DF1\u5733\uFF09</li><li>\u786C\u4EF6\u5DE8\u5934 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noreferrer"},d=i("https://mp.weixin.qq.com/s/hBU-eEUq8aN5PWwdZFmC4g"),u=l("p",null,[l("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png",alt:""})],-1);function m(f,b){const e=t("ExternalLinkIcon");return n(),a("div",null,[c,l("blockquote",null,[l("p",null,[h,l("a",_,[d,r(e)])])]),u])}var k=o(p,[["render",m],["__file","shenzhen.html.vue"]]);export{k as default};
diff --git a/dist/assets/shenzhen.html.61178979.js b/dist/assets/shenzhen.html.61178979.js
new file mode 100644
index 00000000..36e01e53
--- /dev/null
+++ b/dist/assets/shenzhen.html.61178979.js
@@ -0,0 +1 @@
+import{_ as t}from"./plugin-vue_export-helper.21dcd24c.js";import{r as o,o as n,c as a,a as l,b as r,e as s,d as i}from"./app.615e41d8.js";const p={},c=s('<h1 id="\u6DF1\u5733\u90FD\u6709\u54EA\u4E9B\u503C\u5F97\u52A0\u5165\u7684it\u4E92\u8054\u7F51\u516C\u53F8" tabindex="-1"><a class="header-anchor" href="#\u6DF1\u5733\u90FD\u6709\u54EA\u4E9B\u503C\u5F97\u52A0\u5165\u7684it\u4E92\u8054\u7F51\u516C\u53F8" aria-hidden="true">#</a> 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\uFF08\u8BA1\u7B97\u673A\u89C6\u89C9\u3001\u88F8\u773C3D\uFF09</li><li>\u4F18\u5FC5\u9009\u79D1\u6280 \uFF08\u667A\u80FD\u673A\u5668\u4EBA\u3001\u4EBA\u8138\u8BC6\u522B\uFF09</li></ul><p>\u660E\u661F\u521B\u4E1A\u516C\u53F8</p><ul><li>\u4E30\u5DE2\u79D1\u6280\uFF08\u8BA9\u751F\u6D3B\u66F4\u7B80\u5355\uFF09</li><li>\u4EBA\u4EBA\u90FD\u662F\u4EA7\u54C1\u7ECF\u7406\uFF08\u5168\u7403\u9886\u5148\u7684\u4EA7\u54C1\u7ECF\u7406\u548C\u8FD0\u8425\u4EBA \u5B66\u4E60\u3001\u4EA4\u6D41\u3001\u5206\u4EAB\u5E73\u53F0\uFF09</li><li>\u5927\u4E30\u6536\uFF08\u7EFC\u5408\u519C\u4E1A\u4E92\u8054\u7F51\u670D\u52A1\u5E73\u53F0\uFF09</li><li>\u5C0F\u9E45\u901A\uFF08\u4E13\u6CE8\u65B0\u6559\u80B2\u7684\u6280\u672F\u670D\u52A1\u5546\uFF09</li><li>\u8D27\u62C9\u62C9\uFF08\u62C9\u8D27\u5C31\u627E\u8D27\u62C9\u62C9\uFF09</li><li>\u7F16\u7A0B\u732B\uFF08\u5C11\u513F\u7F16\u7A0B\u6559\u80B2\u5934\u90E8\u4F01\u4E1A\uFF09</li><li>HelloTalk\uFF08\u5168\u7403\u6700\u5927\u7684\u8BED\u8A00\u5B66\u4E60\u793E\u4EA4\u793E\u533A\uFF09</li><li>\u5927\u5B87\u65E0\u9650\uFF08 \u62E5\u6709SnapTube, Lark Player \u7B49\u591A\u6B3E\u5E7F\u53D7\u6D77\u5916\u65B0\u5174\u5E02\u573A\u7528\u6237\u6B22\u8FCE\u7684\u4EA7\u54C1\uFF09</li><li>\u77E5\u8BC6\u661F\u7403\uFF08\u6DF1\u5733\u5927\u6210\u5929\u4E0B\u516C\u53F8\u51FA\u54C1\uFF09</li><li>XMind\uFF08\u96B6\u5C5E\u6DF1\u5733\u5E02\u7231\u601D\u8F6F\u4EF6\u6280\u672F\u6709\u9650\u516C\u53F8\uFF0C\u601D\u7EF4\u5BFC\u56FE\u8F6F\u4EF6\uFF09</li><li>\u5C0F\u8D62\u79D1\u6280\uFF08\u4EE5\u6280\u672F\u91CD\u5851\u4EBA\u7C7B\u7684\u91D1\u878D\u4F53\u9A8C\uFF09</li></ul><p>\u5176\u4ED6\u884C\u4E1A\uFF08\u6709\u8F6F\u4EF6/\u4E92\u8054\u7F51\u4E1A\u52A1\uFF09</p><ul><li>\u4E09\u5927\u7535\u4FE1\u8FD0\u8425\u5546\uFF1A\u4E2D\u56FD\u79FB\u52A8\u3001\u4E2D\u56FD\u7535\u4FE1\u3001\u4E2D\u56FD\u8054\u901A</li><li>\u623F\u4EA7\u4F01\u4E1A\uFF1A\u6052\u5927\u3001\u4E07\u79D1</li><li>\u4E2D\u4FE1\u6DF1\u5733</li><li>\u5E7F\u53D1\u8BC1\u5238\uFF0C\u6DF1\u4EA4\u6240</li><li>\u73CD\u7231\u7F51\uFF08\u73CD\u7231\u7F51\u662F\u56FD\u5185\u77E5\u540D\u7684\u5A5A\u604B\u670D\u52A1\u7F51\u7AD9\u4E4B\u4E00\uFF09</li></ul>',15),h=i("\u4F5C\u8005\uFF1A\u4EE3\u7801\u968F\u60F3\u5F55\uFF0C\u8F6C\u8F7D\u94FE\u63A5\uFF1A"),_={href:"https://mp.weixin.qq.com/s/hBU-eEUq8aN5PWwdZFmC4g",target:"_blank",rel:"noopener noreferrer"},d=i("https://mp.weixin.qq.com/s/hBU-eEUq8aN5PWwdZFmC4g"),u=l("p",null,[l("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png",alt:""})],-1);function m(f,b){const e=o("ExternalLinkIcon");return n(),a("div",null,[c,l("blockquote",null,[l("p",null,[h,l("a",_,[d,r(e)])])]),u])}var k=t(p,[["render",m],["__file","shenzhen.html.vue"]]);export{k as default};
diff --git a/dist/assets/shenzhen.html.98e7f6e9.js b/dist/assets/shenzhen.html.98e7f6e9.js
new file mode 100644
index 00000000..7bebb5d2
--- /dev/null
+++ b/dist/assets/shenzhen.html.98e7f6e9.js
@@ -0,0 +1 @@
+const t={key:"v-33fa70f5",path:"/cityselect/shenzhen.html",title:"\u6DF1\u5733\u90FD\u6709\u54EA\u4E9B\u503C\u5F97\u52A0\u5165\u7684IT\u4E92\u8054\u7F51\u516C\u53F8\uFF1F",lang:"zh-CN",frontmatter:{shortTitle:"\u6DF1\u5733",category:["\u6C42\u804C\u9762\u8BD5"],tag:["\u57CE\u5E02\u9009\u62E9"],summary:"\u6DF1\u5733\u90FD\u6709\u54EA\u4E9B\u503C\u5F97\u52A0\u5165\u7684IT\u4E92\u8054\u7F51\u516C\u53F8\uFF1F \u53C8\u5230\u4E86\u4E00\u5E74\u4E00\u5EA6\u7684\u6C42\u804C\u7B7E\u7EA6\u5B63\uFF0C\u4E00\u4E9B\u5C0F\u4F19\u4F34\u8981\u5F00\u59CB\u5B9A\u5DE5\u4F5C\u4E86\uFF0C\u4EBA\u751F\u7B2C\u4E00\u4EFD\u5DE5\u4F5C\u662F\u975E\u5E38\u91CD\u8981\u7684\uFF0C\u540C\u6837\u5DE5\u4F5C\u7684\u57CE\u5E02\u4E5F\u975E\u5E38\u91CD\u8981\u3002 \u5F88\u591A\u5C0F\u4F19\u4F34\u5E0C\u671B\u5728\u5357\u65B9\u53D1\u5C55\uFF0C\u90A3\uFF0C\u4ECE\u4E8BIT\u6216\u8005\u8F6F\u786C\u4EF6\uFF0C\u6DF1\u5733\u7B97\u662F\u4E00\u4E2A\u4E0D\u9519\u7684\u9009\u62E9\uFF0C \u6240\u4EE5\u8FD9\u91CC\u4E5F\u7ED9\u5927\u5BB6\u6574\u7406\u51FA\u4E00\u4EFD\u8BE6\u7EC6\u7684\u6DF1\u5733\u4E92\u8054\u7F51IT\u516C\u53F8list\uFF0C \u591A\u4E00\u4EFD\u9009\u62E9\u591A\u4E00\u4EFD\u673A\u4F1A\uFF01 \u4E00\u7EBF\u4E92\u8054\u7F51 \u817E\u8BAF\uFF08\u603B\u90E8\u6DF1\u5733\uFF09; \u767E\u5EA6\uFF08\u6DF1\u5733\uFF09; ",head:[["meta",{property:"og:url",content:"https://tobebetterjavaer.com/cityselect/shenzhen.html"}],["meta",{property:"og:site_name",content:"Java \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF"}],["meta",{property:"og:title",content:"\u6DF1\u5733\u90FD\u6709\u54EA\u4E9B\u503C\u5F97\u52A0\u5165\u7684IT\u4E92\u8054\u7F51\u516C\u53F8\uFF1F"}],["meta",{property:"og:type",content:"article"}],["meta",{property:"og:updated_time",content:"2022-06-11T12:15:48.000Z"}],["meta",{property:"og:locale",content:"zh-CN"}],["meta",{property:"article:tag",content:"\u57CE\u5E02\u9009\u62E9"}],["meta",{property:"article:modified_time",content:"2022-06-11T12:15:48.000Z"}]]},excerpt:"",headers:[],git:{createdTime:164837021e4,updatedTime:1654949748e3,contributors:[{name:"itwanger",email:"www.qing_gee@163.com",commits:3}]},readingTime:{minutes:2.42,words:726},filePathRelative:"cityselect/shenzhen.md"};export{t as data};
diff --git a/dist/assets/shijian.html.84eb0eab.js b/dist/assets/shijian.html.d1dfaaba.js
similarity index 99%
rename from dist/assets/shijian.html.84eb0eab.js
rename to dist/assets/shijian.html.d1dfaaba.js
index 5836cd2b..21d87138 100644
--- a/dist/assets/shijian.html.84eb0eab.js
+++ b/dist/assets/shijian.html.d1dfaaba.js
@@ -1,4 +1,4 @@
-import{_ as t}from"./plugin-vue_export-helper.21dcd24c.js";import{r as e,o,c,a as s,b as l,e as a,d as n}from"./app.a0271b9c.js";const i={},u=a(`<h1 id="java\u5F02\u5E38\u5904\u7406\u768420\u4E2A\u6700\u4F73\u5B9E\u8DF5" tabindex="-1"><a class="header-anchor" href="#java\u5F02\u5E38\u5904\u7406\u768420\u4E2A\u6700\u4F73\u5B9E\u8DF5" aria-hidden="true">#</a> Java\u5F02\u5E38\u5904\u7406\u768420\u4E2A\u6700\u4F73\u5B9E\u8DF5</h1><p>\u201C\u4E09\u59B9\u554A\uFF0C\u4ECA\u5929\u6211\u6765\u7ED9\u4F60\u4F20\u6388\u51E0\u4E2A\u5F02\u5E38\u5904\u7406\u7684\u6700\u4F73\u5B9E\u8DF5\u7ECF\u9A8C\uFF0C\u4EE5\u514D\u4F60\u4EE5\u540E\u5728\u5F00\u53D1\u4E2D\u91C7\u5751\u3002\u201D\u6211\u9762\u5E26\u7740\u5FAE\u7B11\u5BF9\u4E09\u59B9\u8BF4\u3002</p><p>\u201C\u597D\u554A\uFF0C\u4E8C\u54E5\uFF0C\u6211\u6D17\u8033\u606D\u542C\u3002\u201D\u4E09\u59B9\u4E5F\u5FAE\u5FAE\u4E00\u7B11\uFF0C\u6B23\u7136\u63A5\u53D7\u3002</p><p>\u201C\u597D\uFF0C\u90A3\u54E5\u5C31\u4E0D\u5E9F\u8BDD\u4E86\u3002\u5F00\u6574\u3002\u201D</p><hr><p><strong>1\uFF09\u5C3D\u91CF\u4E0D\u8981\u6355\u83B7 RuntimeException</strong></p><p>\u963F\u91CC\u51FA\u54C1\u7684\u5D69\u5C71\u7248 Java \u5F00\u53D1\u624B\u518C\u4E0A\u8FD9\u6837\u89C4\u5B9A\uFF1A</p><blockquote><p>\u5C3D\u91CF\u4E0D\u8981 catch RuntimeException\uFF0C\u6BD4\u5982 NullPointerException\u3001IndexOutOfBoundsException \u7B49\u7B49\uFF0C\u5E94\u8BE5\u7528\u9884\u68C0\u67E5\u7684\u65B9\u5F0F\u6765\u89C4\u907F\u3002</p></blockquote><p>\u6B63\u4F8B\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">if</span> <span class="token punctuation">(</span>obj <span class="token operator">!=</span> <span class="token keyword">null</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
+import{_ as t}from"./plugin-vue_export-helper.21dcd24c.js";import{r as e,o,c,a as s,b as l,e as a,d as n}from"./app.615e41d8.js";const i={},u=a(`<h1 id="java\u5F02\u5E38\u5904\u7406\u768420\u4E2A\u6700\u4F73\u5B9E\u8DF5" tabindex="-1"><a class="header-anchor" href="#java\u5F02\u5E38\u5904\u7406\u768420\u4E2A\u6700\u4F73\u5B9E\u8DF5" aria-hidden="true">#</a> Java\u5F02\u5E38\u5904\u7406\u768420\u4E2A\u6700\u4F73\u5B9E\u8DF5</h1><p>\u201C\u4E09\u59B9\u554A\uFF0C\u4ECA\u5929\u6211\u6765\u7ED9\u4F60\u4F20\u6388\u51E0\u4E2A\u5F02\u5E38\u5904\u7406\u7684\u6700\u4F73\u5B9E\u8DF5\u7ECF\u9A8C\uFF0C\u4EE5\u514D\u4F60\u4EE5\u540E\u5728\u5F00\u53D1\u4E2D\u91C7\u5751\u3002\u201D\u6211\u9762\u5E26\u7740\u5FAE\u7B11\u5BF9\u4E09\u59B9\u8BF4\u3002</p><p>\u201C\u597D\u554A\uFF0C\u4E8C\u54E5\uFF0C\u6211\u6D17\u8033\u606D\u542C\u3002\u201D\u4E09\u59B9\u4E5F\u5FAE\u5FAE\u4E00\u7B11\uFF0C\u6B23\u7136\u63A5\u53D7\u3002</p><p>\u201C\u597D\uFF0C\u90A3\u54E5\u5C31\u4E0D\u5E9F\u8BDD\u4E86\u3002\u5F00\u6574\u3002\u201D</p><hr><p><strong>1\uFF09\u5C3D\u91CF\u4E0D\u8981\u6355\u83B7 RuntimeException</strong></p><p>\u963F\u91CC\u51FA\u54C1\u7684\u5D69\u5C71\u7248 Java \u5F00\u53D1\u624B\u518C\u4E0A\u8FD9\u6837\u89C4\u5B9A\uFF1A</p><blockquote><p>\u5C3D\u91CF\u4E0D\u8981 catch RuntimeException\uFF0C\u6BD4\u5982 NullPointerException\u3001IndexOutOfBoundsException \u7B49\u7B49\uFF0C\u5E94\u8BE5\u7528\u9884\u68C0\u67E5\u7684\u65B9\u5F0F\u6765\u89C4\u907F\u3002</p></blockquote><p>\u6B63\u4F8B\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">if</span> <span class="token punctuation">(</span>obj <span class="token operator">!=</span> <span class="token keyword">null</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
   <span class="token comment">//...</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>\u53CD\u4F8B\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">try</span> <span class="token punctuation">{</span> 
diff --git a/dist/assets/slf4j.html.a17cdf5a.js b/dist/assets/slf4j.html.f772534d.js
similarity index 99%
rename from dist/assets/slf4j.html.a17cdf5a.js
rename to dist/assets/slf4j.html.f772534d.js
index 21f0fd46..c2606b91 100644
--- a/dist/assets/slf4j.html.a17cdf5a.js
+++ b/dist/assets/slf4j.html.f772534d.js
@@ -1,4 +1,4 @@
-import{_ as p}from"./plugin-vue_export-helper.21dcd24c.js";import{r as o,o as l,c,a as n,b as e,e as t,d as a}from"./app.a0271b9c.js";const i={},u=t(`<p>\u6211\u5728\u8BFB\u5D69\u5C71\u7248\u7684\u963F\u91CC\u5DF4\u5DF4\u5F00\u53D1\u624B\u518C\uFF08\u6CA1\u6709\u7684\u5C0F\u4F19\u4F34\uFF0C\u8BB0\u7740\u627E\u6211\u8981\uFF09\u7684\u65F6\u5019\uFF0C\u5C31\u53D1\u73B0\u4E86\u4E00\u6761\u300C<strong>\u5F3A\u5236</strong>\u300D\u6027\u8D28\u7684\u65E5\u5FD7\u89C4\u7EA6\uFF1A</p><blockquote><p>\u5E94\u7528\u4E2D\u4E0D\u53EF\u4EE5\u76F4\u63A5\u4F7F\u7528\u65E5\u5FD7\u7CFB\u7EDF\uFF08Log4j\u3001Logback\uFF09\u4E2D\u7684 API\uFF0C\u800C\u5E94\u8BE5\u4F7F\u7528\u65E5\u5FD7\u6846\u67B6\u4E2D\u7684 API\uFF0C\u6BD4\u5982\u8BF4 SLF4J\uFF0C\u4F7F\u7528\u95E8\u9762\u6A21\u5F0F\u7684\u65E5\u5FD7\u6846\u67B6\uFF0C\u6709\u5229\u4E8E\u7EF4\u62A4\u548C\u7EDF\u4E00\u5404\u4E2A\u7C7B\u7684\u65E5\u5FD7\u5904\u7406\u65B9\u5F0F\u3002</p></blockquote><p>\uFF08\u4E3A\u4EC0\u4E48\u6211\u628A\u8FD9\u6BB5\u6587\u5B57\u624B\u6572\u4E86\u4E0B\u6765\u5462\uFF0C\u56E0\u4E3A\u6211\u53D1\u73B0\u963F\u91CC\u5DF4\u5DF4\u5F00\u53D1\u624B\u518C\u4E0A\u7684\u6709\u8BED\u75C5\uFF0C\u77A7\u4E0B\u9762\u7EA2\u8272\u6807\u51FA\u7684\u90E8\u5206\uFF09</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/slf4j-94ba034a-c6e6-46e0-bff3-b658bf35945f.png" alt=""></p><p>\uFF08\u7EF4\u62A4\u548C\u7EDF\u4E00\uFF0C\u628A\u7EDF\u4E00\u653E\u5728\u6700\u540E\u9762\u8BFB\u8D77\u6765\u771F\u7684\u662F\u522B\u626D\uFF0C\u548C\u7684\u6709\u70B9\u7275\u5F3A\uFF0C\u8BF7\u95EE\u624B\u518C\u7684\u5C0F\u7F16\u662F\u6570\u5B66\u8001\u5E08\u6559\u7684\u8BED\u6587\u5427\uFF1F\uFF09</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/slf4j-a7a6e0ae-cbee-428e-8a45-2f5a33243625.png" alt=""></p><p>\u90A3\u770B\u5230\u8FD9\u6761\u5F3A\u5236\u6027\u7684\u89C4\u7EA6\uFF0C\u6211\u5C31\u5FCD\u4E0D\u4F4F\u60F3\u8981\u95EE\uFF1A\u201C\u4E3A\u4EC0\u4E48\u963F\u91CC\u5DF4\u5DF4\u5F00\u53D1\u624B\u518C\u4F1A\u5F3A\u5236\u4F7F\u7528 SLF4J \u4F5C\u4E3A Log4J \u7684\u95E8\u9762\u62C5\u5F53\u5462\uFF1F\u201D\u7A76\u7ADF\u8FD9\u80CC\u540E\u85CF\u4E86\u4EC0\u4E48\u201C\u4E0D\u53EF\u544A\u4EBA\u201D\u7684\u79D8\u5BC6\uFF1F</p><p>\uFF08\u8BF7\u5C0F\u4F19\u4F34\u4EEC\u81EA\u884C\u914D\u4E0A CCTV 12 \u53F0\u7684\u90A3\u79CD BGM\uFF09</p><p>PS\uFF1A\u987A\u5E26\u7ED9\u5C0F\u4F19\u4F34\u4EEC\u666E\u53CA\u4E00\u70B9\u5C0F\u77E5\u8BC6\uFF0C\u963F\u91CC\u5DF4\u5DF4\u5F00\u53D1\u624B\u518C\u4E0A\u51FA\u73B0\u7684 Jakarta \u5176\u5B9E\u662F Apache \u8F6F\u4EF6\u57FA\u91D1\u4F1A\u4E0B\u7684\u4E00\u4E2A\u5F00\u6E90\u9879\u76EE\u3002\u5176\u5B9E Commons \u662F\u4EE5\u524D\u96B6\u5C5E\u4E8E Jakarta\uFF0C\u73B0\u5728\u662F\u4F5C\u4E3A Apache \u4E0B\u7684\u4E00\u4E2A\u5355\u72EC\u9879\u76EE\uFF0C\u963F\u91CC\u5DF4\u5DF4\u5F00\u53D1\u624B\u518C\u4E0A\u7684\u63CF\u8FF0\u5DF2\u7ECF\u4E0D\u592A\u6070\u5F53\u4E86\uFF0C\u6362\u6210\u662F Apache Commons Logging \u4F1A\u66F4\u5408\u9002\u4E00\u70B9\u3002</p><p>\uFF08\u5FCD\u4E0D\u4F4F\u53C8\u7ED9\u963F\u91CC\u5DF4\u5DF4\u5F00\u53D1\u624B\u518C\u6311\u4E86\u4E00\u4E2A\u6BDB\u75C5\uFF0C\u8BF7\u539F\u8C05\u6211\u201C\u4E00\u4E1D\u4E0D\u82DF\u201D\u7684\u505A\u4E8B\u6001\u5EA6\uFF09</p><h3 id="_01\u3001slf4j-\u662F\u4EC0\u4E48" tabindex="-1"><a class="header-anchor" href="#_01\u3001slf4j-\u662F\u4EC0\u4E48" aria-hidden="true">#</a> 01\u3001SLF4J \u662F\u4EC0\u4E48</h3><p>SLF4J \u662F Simple Logging Facade for Java \u7684\u7F29\u5199\uFF08for\u22484\uFF09\uFF0C\u4E5F\u5C31\u662F\u7B80\u6613\u7684\u65E5\u5FD7\u95E8\u9762\uFF0C\u4EE5\u5916\u89C2\u6A21\u5F0F\uFF08Facade pattern\uFF0C\u4E00\u79CD\u8BBE\u8BA1\u6A21\u5F0F\uFF0C\u4E3A\u5B50\u7CFB\u7EDF\u4E2D\u7684\u4E00\u7EC4\u63A5\u53E3\u63D0\u4F9B\u4E00\u4E2A\u7EDF\u4E00\u7684\u9AD8\u5C42\u63A5\u53E3\uFF0C\u4F7F\u5F97\u5B50\u7CFB\u7EDF\u66F4\u5BB9\u6613\u4F7F\u7528\uFF09\u5B9E\u73B0\uFF0C\u652F\u6301 java.util.logging\u3001Log4J \u548C Logback\u3002</p><p>SLF4J \u7684\u4F5C\u8005\u5C31\u662F Log4J \u548C Logback \u7684\u4F5C\u8005\uFF0C\u4ED6\u7684 GitHub \u4E3B\u9875\u957F\u4E0B\u9762\u8FD9\u6837\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/slf4j-c72cd63d-b15b-401c-8399-ad0355f1f802.png" alt=""></p><p>\u4E00\u80A1\u79CB\u98CE\u745F\u745F\u7684\u6E05\u51B7\u611F\u6251\u9762\u800C\u6765\uFF0C\u6709\u6CA1\u6709\uFF1F\u53EF\u80FD\u5DE8\u4F6C\u4E0D\u5C51\u4E8E\u7EF4\u62A4\u4ED6\u7684 GitHub \u4E3B\u9875\u5427\uFF1F\u6211\u7684 GitHub \u4E3B\u9875\u591F\u51C4\u60E8\u4E86\uFF0C\u6CA1\u60F3\u5230\u5DE8\u4F6C\u6BD4\u6211\u8FD8\u60E8\uFF0C\u7EC8\u4E8E\u53EF\u4EE5\u5439\u725B\u903C\u5730\u8BF4\uFF0C\u201C\u6211\uFF0C\u6C89\u9ED8\u738B\u4E8C\uFF0CGitHub \u4E3B\u9875\u6BD4 SLF4J\u3001Log4J \u548C Logback \u7684\u4F5C\u8005 Ceki Gulcu \u7EFF\u591A\u4E86\u3002\u3002\u3002\u3002\u3002\u3002\u201D</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/slf4j-cdc9e0fb-71ab-42e7-8024-7e9cfd9b30c3.png" alt=""></p><p>1996 \u5E74\u521D\uFF0C\u6B27\u6D32\u5B89\u5168\u7535\u5B50\u5E02\u573A\u9879\u76EE\u51B3\u5B9A\u7F16\u5199\u81EA\u5DF1\u7684\u8DDF\u8E2A API\uFF0C\u6700\u540E\u8BE5 API \u6F14\u53D8\u6210\u4E86 Log4j\uFF0C\u5DF2\u7ECF\u63A8\u51FA\u5C31\u5907\u53D7\u5BA0\u7231\u3002</p><p>2002 \u5E74 2 \u6708\uFF0CSun \u63A8\u51FA\u4E86\u81EA\u5DF1\u7684\u65E5\u5FD7\u5305 java.util.logging\uFF08\u53EF\u79F0 JUL\uFF09\uFF0C\u636E\u8BF4\u5B9E\u73B0\u601D\u60F3\u501F\u9274\u4E86 Log4j\uFF0C\u6BD5\u7ADF\u6B64\u65F6\u7684 Log4j \u5DF2\u7ECF\u5F88\u6210\u719F\u4E86\u3002</p><p>2002 \u5E74 8 \u6708\uFF0CApache \u5C31\u63A8\u51FA\u4E86\u81EA\u5DF1\u7684\u65E5\u5FD7\u5305\uFF0C\u4E5F\u5C31\u662F\u963F\u91CC\u5DF4\u5DF4\u5F00\u53D1\u624B\u518C\u4E0A\u63D0\u5230\u7684 JCL\uFF08Jakarta Commons Logging\uFF09\u3002JCL \u7684\u91CE\u5FC3\u5F88\u5927\uFF0C\u5B83\u5728 JUL \u548C Log4j \u7684\u57FA\u7840\u4E0A\u63D0\u4F9B\u4E86\u4E00\u4E2A\u62BD\u8C61\u5C42\u7684\u63A5\u53E3\uFF0C\u65B9\u4FBF\u4F7F\u7528\u8005\u5728 JUL \u548C Log4j \u4E4B\u95F4\u5207\u6362\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/slf4j-5b40fac4-0ab1-467d-9dc1-85c43ed879e7.png" alt=""></p><p>\u4F46 JCL \u597D\u50CF\u5E76\u4E0D\u600E\u4E48\u62DB\u4EBA\u559C\u6B22\uFF0C\u6709\u4EBA\u662F\u8FD9\u6837\u62B1\u6028\u7684\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/slf4j-795d5543-7bd1-450a-8a35-a151be106b3b.png" alt=""></p><p>Ceki Gulcu \u4E5F\u89C9\u5F97 JCL \u4E0D\u597D\uFF0C\u8981\u4E0D\u7136\u4ED6\u4E5F\u4E0D\u4F1A\u5728 2005 \u5E74\u81EA\u5DF1\u64B8\u4E00\u4E2A\u540D\u53EB SLF4J \u7684\u65B0\u9879\u76EE\uFF0C\u5BF9\u5427\uFF1F\u4F46\u51FA\u6765\u6DF7\u603B\u662F\u8981\u4ED8\u51FA\u4EE3\u4EF7\u7684\uFF0CSLF4J \u53EA\u6709\u63A5\u53E3\uFF0C\u6CA1\u6709\u5B9E\u73B0\uFF0C\u603B\u4E0D\u80FD\u5F3A\u903C\u7740 Java \u548C Apache \u53BB\u5B9E\u73B0 SLF4J \u63A5\u53E3\u5427\uFF1F\u8FD9\u592A\u96BE\u4E86\uFF0C\u4E0D\u73B0\u5B9E\u3002</p><p>\u4F46\u5DE8\u4F6C\u4E4B\u6240\u4EE5\u79F0\u4E4B\u4E3A\u5DE8\u4F6C\uFF0C\u662F\u56E0\u4E3A\u4ED6\u62E5\u6709\u8D85\u51FA\u666E\u901A\u4EBA\u7684\u60CA\u4EBA\u4E4B\u5904\uFF0C\u4ED6\u5728 SLF4J \u548C JUL\u3001Log4j\u3001JCL \u4E4B\u95F4\u642D\u4E86\u4E09\u5EA7\u6865\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/slf4j-3044b416-ff14-408f-b933-71993b7ddeee.png" alt=""></p><p>\u5DE8\u4F6C\u52A8\u624B\uFF0C\u4E30\u8863\u8DB3\u98DF\uFF0C\u6709\u6CA1\u6709\uFF1F\u72E0\u8D77\u6765\u8FDE\u81EA\u5DF1\u7684 Log4j \u90FD\u642D\u4E2A\u6865\u3002</p><p>\u9762\u5BF9\u5DE8\u4F6C\u7684\u9738\u6C14\uFF0C\u6211\u53EA\u60F3\u5F31\u5F31\u5730\u8BF4\u4E00\u53E5\uFF0C\u201C SLF4J \u8FD9\u4E2A\u95E8\u9762\u62C5\u5F53\uFF0C\u4F60\u4EE5\u4E3A\u597D\u5F53\u7684\u554A\uFF1F\u201D</p><h3 id="_02\u3001slf4j-\u89E3\u51B3\u4E86\u4EC0\u4E48\u75DB\u70B9" tabindex="-1"><a class="header-anchor" href="#_02\u3001slf4j-\u89E3\u51B3\u4E86\u4EC0\u4E48\u75DB\u70B9" aria-hidden="true">#</a> 02\u3001SLF4J \u89E3\u51B3\u4E86\u4EC0\u4E48\u75DB\u70B9</h3><p>\u6625\u79CB\u6218\u56FD\u7684\u65F6\u5019\uFF0C\u6BCF\u4E2A\u56FD\u5BB6\u90FD\u6709\u81EA\u5DF1\u7684\u8D27\u5E01\uFF0C\u7528\u522B\u56FD\u7684\u8D27\u5E01\u4E5F\u4E0D\u5408\u9002\uFF0C\u5BF9\u5427\uFF1F\u90A3\u5728\u53D1\u751F\u8D38\u6613\u7684\u65F6\u5019\u5C31\u6BD4\u8F83\u9EBB\u70E6\u4E86\uFF0C\u8D27\u5E01\u4E0D\u7EDF\u4E00\uFF0C\u5C31\u6CA1\u6CD5\u76F4\u63A5\u4EA4\u6613\uFF0C\u56E0\u4E3A\u8D27\u5E01\u53EF\u80FD\u4E0D\u7B49\u4EF7\u3002</p><p>\u90A3\u79E6\u59CB\u7687\u7EDF\u4E00\u516D\u56FD\u540E\uFF0C\u5C31\u63A8\u51FA\u4E86\u65B0\u7684\u8D27\u5E01\u653F\u7B56\uFF0C\u5168\u56FD\u90FD\u7528\u4E00\u79CD\u8D27\u5E01\uFF0C\u90A3\u4E4B\u524D\u7684\u95EE\u9898\u5C31\u89E3\u51B3\u6389\u4E86\u3002</p><p>\u4F60\u770B\uFF0C\u540C\u6837\u7684\u9053\u7406\uFF0C\u65E5\u5FD7\u7CFB\u7EDF\u6709 JUL\u3001JCL\uFF0CCeki Gulcu \u81EA\u5DF1\u53C8\u5199\u4E86 2 \u79CD\uFF0CLog4j \u548C Logback\uFF0C\u5404\u6709\u5404\u7684\u4F18\u7F3A\u70B9\uFF0C\u518D\u52A0\u4E0A\u4F7F\u7528\u8005\u5343\u5343\u4E07\uFF0C\u841D\u535C\u767D\u83DC\u5404\u6709\u6240\u7231\uFF0C\u8FD9\u5C31\u5BFC\u81F4\u4E0D\u540C\u7684\u5E94\u7528\u53EF\u80FD\u4F1A\u7528\u4E0D\u540C\u7684\u65E5\u5FD7\u7CFB\u7EDF\u3002</p><p>\u5047\u8BBE\u6211\u4EEC\u6B63\u5728\u5F00\u53D1\u4E00\u5957\u7CFB\u7EDF\uFF0C\u6253\u7B97\u7528 SLF4J \u4F5C\u4E3A\u95E8\u9762\uFF0CLog4j \u4F5C\u4E3A\u65E5\u5FD7\u7CFB\u7EDF\uFF0C\u6211\u4EEC\u5728\u9879\u76EE\u4E2D\u4F7F\u7528\u4E86 A \u6846\u67B6\uFF0C\u800C A \u6846\u67B6\u7684\u95E8\u9762\u662F JCL\uFF0C\u65E5\u5FD7\u7CFB\u7EDF\u662F JUL\uFF0C\u90A3\u5C31\u76F8\u7B49\u4E8E\u8981\u7EF4\u62A4\u4E24\u5957\u65E5\u5FD7\u7CFB\u7EDF\uFF0C\u5BF9\u5427\uFF1F</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/slf4j-e66a78a6-1ef6-42c1-86fa-a4c57b3ef160.png" alt=""></p><p>\u8FD9\u5C31\u96BE\u53D7\u4E86\uFF01</p><p>Ceki Gulcu \u60F3\u5230\u4E86\u8FD9\u4E2A\u95EE\u9898\uFF0C\u5E76\u4E14\u5E2E\u6211\u4EEC\u89E3\u51B3\u4E86\uFF01\u6765\u770B SLF4J \u5B98\u7F51\u7ED9\u51FA\u7684\u89E3\u51B3\u65B9\u6848\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/slf4j-5e1021d6-6a81-492b-b8d3-f9438014b53b.png" alt=""></p><ul><li>\u4F7F\u7528 jcl-over-slf4j.jar \u66FF\u6362 commons-logging.jar</li><li>\u5F15\u5165 jul-to-slf4j.jar</li></ul><p>\u4E3A\u4E86\u6A21\u62DF\u8FD9\u4E2A\u8FC7\u7A0B\uFF0C\u6211\u4EEC\u6765\u5EFA\u4E00\u4E2A\u4F7F\u7528 JCL \u7684\u9879\u76EE\u3002</p><p>\u7B2C\u4E00\u6B65\uFF0C\u5728 pom.xml \u6587\u4EF6\u4E2D\u5F15\u5165 commons-logging.jar\uFF1A</p><div class="language-xml ext-xml line-numbers-mode"><pre class="language-xml"><code><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>dependency</span><span class="token punctuation">&gt;</span></span>
+import{_ as p}from"./plugin-vue_export-helper.21dcd24c.js";import{r as o,o as l,c,a as n,b as e,e as t,d as a}from"./app.615e41d8.js";const i={},u=t(`<p>\u6211\u5728\u8BFB\u5D69\u5C71\u7248\u7684\u963F\u91CC\u5DF4\u5DF4\u5F00\u53D1\u624B\u518C\uFF08\u6CA1\u6709\u7684\u5C0F\u4F19\u4F34\uFF0C\u8BB0\u7740\u627E\u6211\u8981\uFF09\u7684\u65F6\u5019\uFF0C\u5C31\u53D1\u73B0\u4E86\u4E00\u6761\u300C<strong>\u5F3A\u5236</strong>\u300D\u6027\u8D28\u7684\u65E5\u5FD7\u89C4\u7EA6\uFF1A</p><blockquote><p>\u5E94\u7528\u4E2D\u4E0D\u53EF\u4EE5\u76F4\u63A5\u4F7F\u7528\u65E5\u5FD7\u7CFB\u7EDF\uFF08Log4j\u3001Logback\uFF09\u4E2D\u7684 API\uFF0C\u800C\u5E94\u8BE5\u4F7F\u7528\u65E5\u5FD7\u6846\u67B6\u4E2D\u7684 API\uFF0C\u6BD4\u5982\u8BF4 SLF4J\uFF0C\u4F7F\u7528\u95E8\u9762\u6A21\u5F0F\u7684\u65E5\u5FD7\u6846\u67B6\uFF0C\u6709\u5229\u4E8E\u7EF4\u62A4\u548C\u7EDF\u4E00\u5404\u4E2A\u7C7B\u7684\u65E5\u5FD7\u5904\u7406\u65B9\u5F0F\u3002</p></blockquote><p>\uFF08\u4E3A\u4EC0\u4E48\u6211\u628A\u8FD9\u6BB5\u6587\u5B57\u624B\u6572\u4E86\u4E0B\u6765\u5462\uFF0C\u56E0\u4E3A\u6211\u53D1\u73B0\u963F\u91CC\u5DF4\u5DF4\u5F00\u53D1\u624B\u518C\u4E0A\u7684\u6709\u8BED\u75C5\uFF0C\u77A7\u4E0B\u9762\u7EA2\u8272\u6807\u51FA\u7684\u90E8\u5206\uFF09</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/slf4j-94ba034a-c6e6-46e0-bff3-b658bf35945f.png" alt=""></p><p>\uFF08\u7EF4\u62A4\u548C\u7EDF\u4E00\uFF0C\u628A\u7EDF\u4E00\u653E\u5728\u6700\u540E\u9762\u8BFB\u8D77\u6765\u771F\u7684\u662F\u522B\u626D\uFF0C\u548C\u7684\u6709\u70B9\u7275\u5F3A\uFF0C\u8BF7\u95EE\u624B\u518C\u7684\u5C0F\u7F16\u662F\u6570\u5B66\u8001\u5E08\u6559\u7684\u8BED\u6587\u5427\uFF1F\uFF09</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/slf4j-a7a6e0ae-cbee-428e-8a45-2f5a33243625.png" alt=""></p><p>\u90A3\u770B\u5230\u8FD9\u6761\u5F3A\u5236\u6027\u7684\u89C4\u7EA6\uFF0C\u6211\u5C31\u5FCD\u4E0D\u4F4F\u60F3\u8981\u95EE\uFF1A\u201C\u4E3A\u4EC0\u4E48\u963F\u91CC\u5DF4\u5DF4\u5F00\u53D1\u624B\u518C\u4F1A\u5F3A\u5236\u4F7F\u7528 SLF4J \u4F5C\u4E3A Log4J \u7684\u95E8\u9762\u62C5\u5F53\u5462\uFF1F\u201D\u7A76\u7ADF\u8FD9\u80CC\u540E\u85CF\u4E86\u4EC0\u4E48\u201C\u4E0D\u53EF\u544A\u4EBA\u201D\u7684\u79D8\u5BC6\uFF1F</p><p>\uFF08\u8BF7\u5C0F\u4F19\u4F34\u4EEC\u81EA\u884C\u914D\u4E0A CCTV 12 \u53F0\u7684\u90A3\u79CD BGM\uFF09</p><p>PS\uFF1A\u987A\u5E26\u7ED9\u5C0F\u4F19\u4F34\u4EEC\u666E\u53CA\u4E00\u70B9\u5C0F\u77E5\u8BC6\uFF0C\u963F\u91CC\u5DF4\u5DF4\u5F00\u53D1\u624B\u518C\u4E0A\u51FA\u73B0\u7684 Jakarta \u5176\u5B9E\u662F Apache \u8F6F\u4EF6\u57FA\u91D1\u4F1A\u4E0B\u7684\u4E00\u4E2A\u5F00\u6E90\u9879\u76EE\u3002\u5176\u5B9E Commons \u662F\u4EE5\u524D\u96B6\u5C5E\u4E8E Jakarta\uFF0C\u73B0\u5728\u662F\u4F5C\u4E3A Apache \u4E0B\u7684\u4E00\u4E2A\u5355\u72EC\u9879\u76EE\uFF0C\u963F\u91CC\u5DF4\u5DF4\u5F00\u53D1\u624B\u518C\u4E0A\u7684\u63CF\u8FF0\u5DF2\u7ECF\u4E0D\u592A\u6070\u5F53\u4E86\uFF0C\u6362\u6210\u662F Apache Commons Logging \u4F1A\u66F4\u5408\u9002\u4E00\u70B9\u3002</p><p>\uFF08\u5FCD\u4E0D\u4F4F\u53C8\u7ED9\u963F\u91CC\u5DF4\u5DF4\u5F00\u53D1\u624B\u518C\u6311\u4E86\u4E00\u4E2A\u6BDB\u75C5\uFF0C\u8BF7\u539F\u8C05\u6211\u201C\u4E00\u4E1D\u4E0D\u82DF\u201D\u7684\u505A\u4E8B\u6001\u5EA6\uFF09</p><h3 id="_01\u3001slf4j-\u662F\u4EC0\u4E48" tabindex="-1"><a class="header-anchor" href="#_01\u3001slf4j-\u662F\u4EC0\u4E48" aria-hidden="true">#</a> 01\u3001SLF4J \u662F\u4EC0\u4E48</h3><p>SLF4J \u662F Simple Logging Facade for Java \u7684\u7F29\u5199\uFF08for\u22484\uFF09\uFF0C\u4E5F\u5C31\u662F\u7B80\u6613\u7684\u65E5\u5FD7\u95E8\u9762\uFF0C\u4EE5\u5916\u89C2\u6A21\u5F0F\uFF08Facade pattern\uFF0C\u4E00\u79CD\u8BBE\u8BA1\u6A21\u5F0F\uFF0C\u4E3A\u5B50\u7CFB\u7EDF\u4E2D\u7684\u4E00\u7EC4\u63A5\u53E3\u63D0\u4F9B\u4E00\u4E2A\u7EDF\u4E00\u7684\u9AD8\u5C42\u63A5\u53E3\uFF0C\u4F7F\u5F97\u5B50\u7CFB\u7EDF\u66F4\u5BB9\u6613\u4F7F\u7528\uFF09\u5B9E\u73B0\uFF0C\u652F\u6301 java.util.logging\u3001Log4J \u548C Logback\u3002</p><p>SLF4J \u7684\u4F5C\u8005\u5C31\u662F Log4J \u548C Logback \u7684\u4F5C\u8005\uFF0C\u4ED6\u7684 GitHub \u4E3B\u9875\u957F\u4E0B\u9762\u8FD9\u6837\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/slf4j-c72cd63d-b15b-401c-8399-ad0355f1f802.png" alt=""></p><p>\u4E00\u80A1\u79CB\u98CE\u745F\u745F\u7684\u6E05\u51B7\u611F\u6251\u9762\u800C\u6765\uFF0C\u6709\u6CA1\u6709\uFF1F\u53EF\u80FD\u5DE8\u4F6C\u4E0D\u5C51\u4E8E\u7EF4\u62A4\u4ED6\u7684 GitHub \u4E3B\u9875\u5427\uFF1F\u6211\u7684 GitHub \u4E3B\u9875\u591F\u51C4\u60E8\u4E86\uFF0C\u6CA1\u60F3\u5230\u5DE8\u4F6C\u6BD4\u6211\u8FD8\u60E8\uFF0C\u7EC8\u4E8E\u53EF\u4EE5\u5439\u725B\u903C\u5730\u8BF4\uFF0C\u201C\u6211\uFF0C\u6C89\u9ED8\u738B\u4E8C\uFF0CGitHub \u4E3B\u9875\u6BD4 SLF4J\u3001Log4J \u548C Logback \u7684\u4F5C\u8005 Ceki Gulcu \u7EFF\u591A\u4E86\u3002\u3002\u3002\u3002\u3002\u3002\u201D</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/slf4j-cdc9e0fb-71ab-42e7-8024-7e9cfd9b30c3.png" alt=""></p><p>1996 \u5E74\u521D\uFF0C\u6B27\u6D32\u5B89\u5168\u7535\u5B50\u5E02\u573A\u9879\u76EE\u51B3\u5B9A\u7F16\u5199\u81EA\u5DF1\u7684\u8DDF\u8E2A API\uFF0C\u6700\u540E\u8BE5 API \u6F14\u53D8\u6210\u4E86 Log4j\uFF0C\u5DF2\u7ECF\u63A8\u51FA\u5C31\u5907\u53D7\u5BA0\u7231\u3002</p><p>2002 \u5E74 2 \u6708\uFF0CSun \u63A8\u51FA\u4E86\u81EA\u5DF1\u7684\u65E5\u5FD7\u5305 java.util.logging\uFF08\u53EF\u79F0 JUL\uFF09\uFF0C\u636E\u8BF4\u5B9E\u73B0\u601D\u60F3\u501F\u9274\u4E86 Log4j\uFF0C\u6BD5\u7ADF\u6B64\u65F6\u7684 Log4j \u5DF2\u7ECF\u5F88\u6210\u719F\u4E86\u3002</p><p>2002 \u5E74 8 \u6708\uFF0CApache \u5C31\u63A8\u51FA\u4E86\u81EA\u5DF1\u7684\u65E5\u5FD7\u5305\uFF0C\u4E5F\u5C31\u662F\u963F\u91CC\u5DF4\u5DF4\u5F00\u53D1\u624B\u518C\u4E0A\u63D0\u5230\u7684 JCL\uFF08Jakarta Commons Logging\uFF09\u3002JCL \u7684\u91CE\u5FC3\u5F88\u5927\uFF0C\u5B83\u5728 JUL \u548C Log4j \u7684\u57FA\u7840\u4E0A\u63D0\u4F9B\u4E86\u4E00\u4E2A\u62BD\u8C61\u5C42\u7684\u63A5\u53E3\uFF0C\u65B9\u4FBF\u4F7F\u7528\u8005\u5728 JUL \u548C Log4j \u4E4B\u95F4\u5207\u6362\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/slf4j-5b40fac4-0ab1-467d-9dc1-85c43ed879e7.png" alt=""></p><p>\u4F46 JCL \u597D\u50CF\u5E76\u4E0D\u600E\u4E48\u62DB\u4EBA\u559C\u6B22\uFF0C\u6709\u4EBA\u662F\u8FD9\u6837\u62B1\u6028\u7684\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/slf4j-795d5543-7bd1-450a-8a35-a151be106b3b.png" alt=""></p><p>Ceki Gulcu \u4E5F\u89C9\u5F97 JCL \u4E0D\u597D\uFF0C\u8981\u4E0D\u7136\u4ED6\u4E5F\u4E0D\u4F1A\u5728 2005 \u5E74\u81EA\u5DF1\u64B8\u4E00\u4E2A\u540D\u53EB SLF4J \u7684\u65B0\u9879\u76EE\uFF0C\u5BF9\u5427\uFF1F\u4F46\u51FA\u6765\u6DF7\u603B\u662F\u8981\u4ED8\u51FA\u4EE3\u4EF7\u7684\uFF0CSLF4J \u53EA\u6709\u63A5\u53E3\uFF0C\u6CA1\u6709\u5B9E\u73B0\uFF0C\u603B\u4E0D\u80FD\u5F3A\u903C\u7740 Java \u548C Apache \u53BB\u5B9E\u73B0 SLF4J \u63A5\u53E3\u5427\uFF1F\u8FD9\u592A\u96BE\u4E86\uFF0C\u4E0D\u73B0\u5B9E\u3002</p><p>\u4F46\u5DE8\u4F6C\u4E4B\u6240\u4EE5\u79F0\u4E4B\u4E3A\u5DE8\u4F6C\uFF0C\u662F\u56E0\u4E3A\u4ED6\u62E5\u6709\u8D85\u51FA\u666E\u901A\u4EBA\u7684\u60CA\u4EBA\u4E4B\u5904\uFF0C\u4ED6\u5728 SLF4J \u548C JUL\u3001Log4j\u3001JCL \u4E4B\u95F4\u642D\u4E86\u4E09\u5EA7\u6865\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/slf4j-3044b416-ff14-408f-b933-71993b7ddeee.png" alt=""></p><p>\u5DE8\u4F6C\u52A8\u624B\uFF0C\u4E30\u8863\u8DB3\u98DF\uFF0C\u6709\u6CA1\u6709\uFF1F\u72E0\u8D77\u6765\u8FDE\u81EA\u5DF1\u7684 Log4j \u90FD\u642D\u4E2A\u6865\u3002</p><p>\u9762\u5BF9\u5DE8\u4F6C\u7684\u9738\u6C14\uFF0C\u6211\u53EA\u60F3\u5F31\u5F31\u5730\u8BF4\u4E00\u53E5\uFF0C\u201C SLF4J \u8FD9\u4E2A\u95E8\u9762\u62C5\u5F53\uFF0C\u4F60\u4EE5\u4E3A\u597D\u5F53\u7684\u554A\uFF1F\u201D</p><h3 id="_02\u3001slf4j-\u89E3\u51B3\u4E86\u4EC0\u4E48\u75DB\u70B9" tabindex="-1"><a class="header-anchor" href="#_02\u3001slf4j-\u89E3\u51B3\u4E86\u4EC0\u4E48\u75DB\u70B9" aria-hidden="true">#</a> 02\u3001SLF4J \u89E3\u51B3\u4E86\u4EC0\u4E48\u75DB\u70B9</h3><p>\u6625\u79CB\u6218\u56FD\u7684\u65F6\u5019\uFF0C\u6BCF\u4E2A\u56FD\u5BB6\u90FD\u6709\u81EA\u5DF1\u7684\u8D27\u5E01\uFF0C\u7528\u522B\u56FD\u7684\u8D27\u5E01\u4E5F\u4E0D\u5408\u9002\uFF0C\u5BF9\u5427\uFF1F\u90A3\u5728\u53D1\u751F\u8D38\u6613\u7684\u65F6\u5019\u5C31\u6BD4\u8F83\u9EBB\u70E6\u4E86\uFF0C\u8D27\u5E01\u4E0D\u7EDF\u4E00\uFF0C\u5C31\u6CA1\u6CD5\u76F4\u63A5\u4EA4\u6613\uFF0C\u56E0\u4E3A\u8D27\u5E01\u53EF\u80FD\u4E0D\u7B49\u4EF7\u3002</p><p>\u90A3\u79E6\u59CB\u7687\u7EDF\u4E00\u516D\u56FD\u540E\uFF0C\u5C31\u63A8\u51FA\u4E86\u65B0\u7684\u8D27\u5E01\u653F\u7B56\uFF0C\u5168\u56FD\u90FD\u7528\u4E00\u79CD\u8D27\u5E01\uFF0C\u90A3\u4E4B\u524D\u7684\u95EE\u9898\u5C31\u89E3\u51B3\u6389\u4E86\u3002</p><p>\u4F60\u770B\uFF0C\u540C\u6837\u7684\u9053\u7406\uFF0C\u65E5\u5FD7\u7CFB\u7EDF\u6709 JUL\u3001JCL\uFF0CCeki Gulcu \u81EA\u5DF1\u53C8\u5199\u4E86 2 \u79CD\uFF0CLog4j \u548C Logback\uFF0C\u5404\u6709\u5404\u7684\u4F18\u7F3A\u70B9\uFF0C\u518D\u52A0\u4E0A\u4F7F\u7528\u8005\u5343\u5343\u4E07\uFF0C\u841D\u535C\u767D\u83DC\u5404\u6709\u6240\u7231\uFF0C\u8FD9\u5C31\u5BFC\u81F4\u4E0D\u540C\u7684\u5E94\u7528\u53EF\u80FD\u4F1A\u7528\u4E0D\u540C\u7684\u65E5\u5FD7\u7CFB\u7EDF\u3002</p><p>\u5047\u8BBE\u6211\u4EEC\u6B63\u5728\u5F00\u53D1\u4E00\u5957\u7CFB\u7EDF\uFF0C\u6253\u7B97\u7528 SLF4J \u4F5C\u4E3A\u95E8\u9762\uFF0CLog4j \u4F5C\u4E3A\u65E5\u5FD7\u7CFB\u7EDF\uFF0C\u6211\u4EEC\u5728\u9879\u76EE\u4E2D\u4F7F\u7528\u4E86 A \u6846\u67B6\uFF0C\u800C A \u6846\u67B6\u7684\u95E8\u9762\u662F JCL\uFF0C\u65E5\u5FD7\u7CFB\u7EDF\u662F JUL\uFF0C\u90A3\u5C31\u76F8\u7B49\u4E8E\u8981\u7EF4\u62A4\u4E24\u5957\u65E5\u5FD7\u7CFB\u7EDF\uFF0C\u5BF9\u5427\uFF1F</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/slf4j-e66a78a6-1ef6-42c1-86fa-a4c57b3ef160.png" alt=""></p><p>\u8FD9\u5C31\u96BE\u53D7\u4E86\uFF01</p><p>Ceki Gulcu \u60F3\u5230\u4E86\u8FD9\u4E2A\u95EE\u9898\uFF0C\u5E76\u4E14\u5E2E\u6211\u4EEC\u89E3\u51B3\u4E86\uFF01\u6765\u770B SLF4J \u5B98\u7F51\u7ED9\u51FA\u7684\u89E3\u51B3\u65B9\u6848\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/slf4j-5e1021d6-6a81-492b-b8d3-f9438014b53b.png" alt=""></p><ul><li>\u4F7F\u7528 jcl-over-slf4j.jar \u66FF\u6362 commons-logging.jar</li><li>\u5F15\u5165 jul-to-slf4j.jar</li></ul><p>\u4E3A\u4E86\u6A21\u62DF\u8FD9\u4E2A\u8FC7\u7A0B\uFF0C\u6211\u4EEC\u6765\u5EFA\u4E00\u4E2A\u4F7F\u7528 JCL \u7684\u9879\u76EE\u3002</p><p>\u7B2C\u4E00\u6B65\uFF0C\u5728 pom.xml \u6587\u4EF6\u4E2D\u5F15\u5165 commons-logging.jar\uFF1A</p><div class="language-xml ext-xml line-numbers-mode"><pre class="language-xml"><code><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>dependency</span><span class="token punctuation">&gt;</span></span>
     <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>groupId</span><span class="token punctuation">&gt;</span></span>commons-logging<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>groupId</span><span class="token punctuation">&gt;</span></span>
     <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>artifactId</span><span class="token punctuation">&gt;</span></span>commons-logging<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>artifactId</span><span class="token punctuation">&gt;</span></span>
     <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>version</span><span class="token punctuation">&gt;</span></span>1.2<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>version</span><span class="token punctuation">&gt;</span></span>
diff --git a/dist/assets/split.html.dbaed6aa.js b/dist/assets/split.html.b69d2cd1.js
similarity index 99%
rename from dist/assets/split.html.dbaed6aa.js
rename to dist/assets/split.html.b69d2cd1.js
index 665eeb3a..bb33480c 100644
--- a/dist/assets/split.html.dbaed6aa.js
+++ b/dist/assets/split.html.b69d2cd1.js
@@ -1,4 +1,4 @@
-import{_ as e}from"./plugin-vue_export-helper.21dcd24c.js";import{r as o,o as c,c as l,a as n,b as a,e as t,d as p}from"./app.a0271b9c.js";const i={},u=t(`<h1 id="\u5982\u4F55\u5728java\u4E2D\u4F18\u96C5\u5730\u5206\u5272string\u5B57\u7B26\u4E32" tabindex="-1"><a class="header-anchor" href="#\u5982\u4F55\u5728java\u4E2D\u4F18\u96C5\u5730\u5206\u5272string\u5B57\u7B26\u4E32" aria-hidden="true">#</a> \u5982\u4F55\u5728Java\u4E2D\u4F18\u96C5\u5730\u5206\u5272String\u5B57\u7B26\u4E32\uFF1F</h1><p>\u201C\u54E5\uFF0C\u6211\u611F\u89C9\u5B57\u7B26\u4E32\u62C6\u5206\u6CA1\u4EC0\u4E48\u53EF\u8BB2\u7684\u5440\uFF0C\u76F4\u63A5\u4E0A String \u7C7B\u7684 <code>split()</code> \u65B9\u6CD5\u4E0D\u5C31\u53EF\u4EE5\u4E86\uFF01\u201D\u4E09\u59B9\u6BEB\u4E0D\u5BA2\u6C14\u5730\u8BF4\u3002</p><p>\u201C\u5047\u5982\u4F60\u771F\u7684\u8FD9\u4E48\u89C9\u5F97\uFF0C\u90A3\u53EF\u8981\u6CE8\u610F\u4E86\uFF0C\u4E8B\u60C5\u8FDC\u6CA1\u8FD9\u4E48\u7B80\u5355\u3002\u201D\u6211\u5FAE\u7B11\u7740\u8BF4\u3002</p><p>\u5047\u5982\u73B0\u5728\u6709\u8FD9\u6837\u4E00\u4E32\u5B57\u7B26\u5E8F\u5217\u201C\u6C89\u9ED8\u738B\u4E8C\uFF0C\u4E00\u679A\u6709\u8DA3\u7684\u7A0B\u5E8F\u5458\u201D\uFF0C\u9700\u8981\u6309\u7167\u4E2D\u6587\u9017\u53F7\u201C\uFF0C\u201D\u8FDB\u884C\u62C6\u5206\uFF0C\u8FD9\u610F\u5473\u7740\u7B2C\u4E00\u4E32\u5B57\u7B26\u5E8F\u5217\u4E3A\u9017\u53F7\u524D\u9762\u7684\u201C\u6C89\u9ED8\u738B\u4E8C\u201D\uFF0C\u7B2C\u4E8C\u4E32\u5B57\u7B26\u5E8F\u5217\u4E3A\u9017\u53F7\u540E\u9762\u7684\u201C\u4E00\u679A\u6709\u8DA3\u7684\u7A0B\u5E8F\u5458\u201D\u3002</p><p>\u201C\u8FD9\u4E0D\u7B49\u4E8E\u6CA1\u8BF4\u5417\uFF1F\u54E5\uFF01\u201D\u8FD8\u6CA1\u7B49\u6211\u8BF4\uFF0C\u4E09\u59B9\u5C31\u6253\u65AD\u4E86\u6211\u3002</p><p>\u201C\u522B\u7740\u6025\u561B\uFF0C\u7B49\u54E5\u8BF4\u5B8C\u3002\u201D\u6211\u4F9D\u7136\u4FDD\u6301\u7740\u5FAE\u7B11\u7EE7\u7EED\u8BF4\uFF0C\u201C\u5728\u62C6\u5206\u4E4B\u524D\uFF0C\u8981\u5148\u8FDB\u884C\u68C0\u67E5\uFF0C\u5224\u65AD\u4E00\u4E0B\u8FD9\u4E32\u5B57\u7B26\u662F\u5426\u5305\u542B\u9017\u53F7\uFF0C\u5426\u5219\u5E94\u8BE5\u629B\u51FA\u5F02\u5E38\u3002\u201D</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">Test</span> <span class="token punctuation">{</span>
+import{_ as e}from"./plugin-vue_export-helper.21dcd24c.js";import{r as o,o as c,c as l,a as n,b as a,e as t,d as p}from"./app.615e41d8.js";const i={},u=t(`<h1 id="\u5982\u4F55\u5728java\u4E2D\u4F18\u96C5\u5730\u5206\u5272string\u5B57\u7B26\u4E32" tabindex="-1"><a class="header-anchor" href="#\u5982\u4F55\u5728java\u4E2D\u4F18\u96C5\u5730\u5206\u5272string\u5B57\u7B26\u4E32" aria-hidden="true">#</a> \u5982\u4F55\u5728Java\u4E2D\u4F18\u96C5\u5730\u5206\u5272String\u5B57\u7B26\u4E32\uFF1F</h1><p>\u201C\u54E5\uFF0C\u6211\u611F\u89C9\u5B57\u7B26\u4E32\u62C6\u5206\u6CA1\u4EC0\u4E48\u53EF\u8BB2\u7684\u5440\uFF0C\u76F4\u63A5\u4E0A String \u7C7B\u7684 <code>split()</code> \u65B9\u6CD5\u4E0D\u5C31\u53EF\u4EE5\u4E86\uFF01\u201D\u4E09\u59B9\u6BEB\u4E0D\u5BA2\u6C14\u5730\u8BF4\u3002</p><p>\u201C\u5047\u5982\u4F60\u771F\u7684\u8FD9\u4E48\u89C9\u5F97\uFF0C\u90A3\u53EF\u8981\u6CE8\u610F\u4E86\uFF0C\u4E8B\u60C5\u8FDC\u6CA1\u8FD9\u4E48\u7B80\u5355\u3002\u201D\u6211\u5FAE\u7B11\u7740\u8BF4\u3002</p><p>\u5047\u5982\u73B0\u5728\u6709\u8FD9\u6837\u4E00\u4E32\u5B57\u7B26\u5E8F\u5217\u201C\u6C89\u9ED8\u738B\u4E8C\uFF0C\u4E00\u679A\u6709\u8DA3\u7684\u7A0B\u5E8F\u5458\u201D\uFF0C\u9700\u8981\u6309\u7167\u4E2D\u6587\u9017\u53F7\u201C\uFF0C\u201D\u8FDB\u884C\u62C6\u5206\uFF0C\u8FD9\u610F\u5473\u7740\u7B2C\u4E00\u4E32\u5B57\u7B26\u5E8F\u5217\u4E3A\u9017\u53F7\u524D\u9762\u7684\u201C\u6C89\u9ED8\u738B\u4E8C\u201D\uFF0C\u7B2C\u4E8C\u4E32\u5B57\u7B26\u5E8F\u5217\u4E3A\u9017\u53F7\u540E\u9762\u7684\u201C\u4E00\u679A\u6709\u8DA3\u7684\u7A0B\u5E8F\u5458\u201D\u3002</p><p>\u201C\u8FD9\u4E0D\u7B49\u4E8E\u6CA1\u8BF4\u5417\uFF1F\u54E5\uFF01\u201D\u8FD8\u6CA1\u7B49\u6211\u8BF4\uFF0C\u4E09\u59B9\u5C31\u6253\u65AD\u4E86\u6211\u3002</p><p>\u201C\u522B\u7740\u6025\u561B\uFF0C\u7B49\u54E5\u8BF4\u5B8C\u3002\u201D\u6211\u4F9D\u7136\u4FDD\u6301\u7740\u5FAE\u7B11\u7EE7\u7EED\u8BF4\uFF0C\u201C\u5728\u62C6\u5206\u4E4B\u524D\uFF0C\u8981\u5148\u8FDB\u884C\u68C0\u67E5\uFF0C\u5224\u65AD\u4E00\u4E0B\u8FD9\u4E32\u5B57\u7B26\u662F\u5426\u5305\u542B\u9017\u53F7\uFF0C\u5426\u5219\u5E94\u8BE5\u629B\u51FA\u5F02\u5E38\u3002\u201D</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">Test</span> <span class="token punctuation">{</span>
     <span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">void</span> <span class="token function">main</span><span class="token punctuation">(</span><span class="token class-name">String</span><span class="token punctuation">[</span><span class="token punctuation">]</span> args<span class="token punctuation">)</span> <span class="token punctuation">{</span>
         <span class="token class-name">String</span> cmower <span class="token operator">=</span> <span class="token string">&quot;\u6C89\u9ED8\u738B\u4E8C\uFF0C\u4E00\u679A\u6709\u8DA3\u7684\u7A0B\u5E8F\u5458&quot;</span><span class="token punctuation">;</span>
         <span class="token keyword">if</span> <span class="token punctuation">(</span>cmower<span class="token punctuation">.</span><span class="token function">contains</span><span class="token punctuation">(</span><span class="token string">&quot;\uFF0C&quot;</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
diff --git a/dist/assets/spring.html.26f406c7.js b/dist/assets/spring.html.40b7b2ff.js
similarity index 99%
rename from dist/assets/spring.html.26f406c7.js
rename to dist/assets/spring.html.40b7b2ff.js
index 47e3c669..6755d028 100644
--- a/dist/assets/spring.html.26f406c7.js
+++ b/dist/assets/spring.html.40b7b2ff.js
@@ -1,4 +1,4 @@
-import{_ as p}from"./plugin-vue_export-helper.21dcd24c.js";import{r as o,o as c,c as i,a as s,b as t,d as n,e}from"./app.a0271b9c.js";const l={},r=s("h1",{id:"\u9762\u6E23\u9006\u88AD-spring-\u5FC5\u770B",tabindex:"-1"},[s("a",{class:"header-anchor",href:"#\u9762\u6E23\u9006\u88AD-spring-\u5FC5\u770B","aria-hidden":"true"},"#"),n(" \u9762\u6E23\u9006\u88AD\uFF08Spring\uFF09\u5FC5\u770B\u{1F44D}")],-1),u=n("\u56FE\u6587\u8BE6\u89E3 35 \u9053Spring\u9762\u8BD5\u9AD8\u9891\u9898\uFF0C\u8FD9\u6B21\u540A\u6253\u9762\u8BD5\u5B98\uFF0C\u6211\u89C9\u5F97\u7A33\u4E86\uFF08\u624B\u52A8 dog\uFF09\u3002\u6574\u7406\uFF1A\u6C89\u9ED8\u738B\u4E8C\uFF0C\u6233"),d={href:"https://mp.weixin.qq.com/s/EQge6DmgIqYITM3mAxkatg",target:"_blank",rel:"noopener noreferrer"},k=n("\u8F6C\u8F7D\u94FE\u63A5"),v=n("\uFF0C\u4F5C\u8005\uFF1A\u4E09\u5206\u6076\uFF0C\u6233"),m={href:"https://mp.weixin.qq.com/s/Y17S85ntHm_MLTZMJdtjQQ",target:"_blank",rel:"noopener noreferrer"},b=n("\u539F\u6587\u94FE\u63A5"),g=n("\u3002"),f=e(`<h2 id="\u57FA\u7840" tabindex="-1"><a class="header-anchor" href="#\u57FA\u7840" aria-hidden="true">#</a> \u57FA\u7840</h2><h3 id="_1-spring-\u662F\u4EC0\u4E48-\u7279\u6027-\u6709\u54EA\u4E9B\u6A21\u5757" tabindex="-1"><a class="header-anchor" href="#_1-spring-\u662F\u4EC0\u4E48-\u7279\u6027-\u6709\u54EA\u4E9B\u6A21\u5757" aria-hidden="true">#</a> 1.Spring \u662F\u4EC0\u4E48\uFF1F\u7279\u6027\uFF1F\u6709\u54EA\u4E9B\u6A21\u5757\uFF1F</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-165c27b4-2ea0-409a-8fa5-389c105db0fa.png" alt="Spring Logo"></p><p>\u4E00\u53E5\u8BDD\u6982\u62EC\uFF1A<strong>Spring \u662F\u4E00\u4E2A\u8F7B\u91CF\u7EA7\u3001\u975E\u5165\u4FB5\u5F0F\u7684\u63A7\u5236\u53CD\u8F6C (IoC) \u548C\u9762\u5411\u5207\u9762 (AOP) \u7684\u6846\u67B6\u3002</strong></p><p>2003 \u5E74\uFF0C\u4E00\u4E2A\u97F3\u4E50\u5BB6 Rod Johnson \u51B3\u5B9A\u53D1\u5C55\u4E00\u4E2A\u8F7B\u91CF\u7EA7\u7684 Java \u5F00\u53D1\u6846\u67B6\uFF0C<code>Spring</code>\u4F5C\u4E3A Java \u6218\u573A\u7684\u9F99\u9A91\u5175\u6E10\u6E10\u5D1B\u8D77\uFF0C\u5E76\u6DD8\u6C70\u4E86<code>EJB</code>\u8FD9\u4E2A\u4F20\u7EDF\u7684\u91CD\u88C5\u9A91\u5175\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-5d9efb93-03a5-400c-8429-3be7c5eeddfb.png" alt="Spring\u91CD\u8981\u7248\u672C"></p><p>\u5230\u4E86\u73B0\u5728\uFF0C\u4F01\u4E1A\u7EA7\u5F00\u53D1\u7684\u6807\u914D\u57FA\u672C\u5C31\u662F <strong>Spring5</strong> + <strong>Spring Boot 2</strong> + <strong>JDK 8</strong></p><blockquote><p>Spring \u6709\u54EA\u4E9B\u7279\u6027\u5462\uFF1F</p></blockquote><p>Spring \u6709\u5F88\u591A\u4F18\u70B9\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-a0f0ef9d-3289-41ea-94c2-34b7e37ef854.png" alt="Spring\u7279\u6027"></p><ol><li><strong>IOC</strong> \u548C <strong>DI</strong> \u7684\u652F\u6301</li></ol><p>Spring \u7684\u6838\u5FC3\u5C31\u662F\u4E00\u4E2A\u5927\u7684\u5DE5\u5382\u5BB9\u5668\uFF0C\u53EF\u4EE5\u7EF4\u62A4\u6240\u6709\u5BF9\u8C61\u7684\u521B\u5EFA\u548C\u4F9D\u8D56\u5173\u7CFB\uFF0CSpring \u5DE5\u5382\u7528\u4E8E\u751F\u6210 Bean\uFF0C\u5E76\u4E14\u7BA1\u7406 Bean \u7684\u751F\u547D\u5468\u671F\uFF0C\u5B9E\u73B0<strong>\u9AD8\u5185\u805A\u4F4E\u8026\u5408</strong>\u7684\u8BBE\u8BA1\u7406\u5FF5\u3002</p><ol start="2"><li>AOP \u7F16\u7A0B\u7684\u652F\u6301</li></ol><p>Spring \u63D0\u4F9B\u4E86<strong>\u9762\u5411\u5207\u9762\u7F16\u7A0B</strong>\uFF0C\u53EF\u4EE5\u65B9\u4FBF\u7684\u5B9E\u73B0\u5BF9\u7A0B\u5E8F\u8FDB\u884C\u6743\u9650\u62E6\u622A\u3001\u8FD0\u884C\u76D1\u63A7\u7B49\u5207\u9762\u529F\u80FD\u3002</p><ol start="3"><li>\u58F0\u660E\u5F0F\u4E8B\u52A1\u7684\u652F\u6301</li></ol><p>\u652F\u6301\u901A\u8FC7\u914D\u7F6E\u5C31\u6765\u5B8C\u6210\u5BF9\u4E8B\u52A1\u7684\u7BA1\u7406\uFF0C\u800C\u4E0D\u9700\u8981\u901A\u8FC7\u786C\u7F16\u7801\u7684\u65B9\u5F0F\uFF0C\u4EE5\u524D\u91CD\u590D\u7684\u4E00\u4E9B\u4E8B\u52A1\u63D0\u4EA4\u3001\u56DE\u6EDA\u7684 JDBC \u4EE3\u7801\uFF0C\u90FD\u53EF\u4EE5\u4E0D\u7528\u81EA\u5DF1\u5199\u4E86\u3002</p><ol start="4"><li>\u5FEB\u6377\u6D4B\u8BD5\u7684\u652F\u6301</li></ol><p>Spring \u5BF9 Junit \u63D0\u4F9B\u652F\u6301\uFF0C\u53EF\u4EE5\u901A\u8FC7<strong>\u6CE8\u89E3</strong>\u5FEB\u6377\u5730\u6D4B\u8BD5 Spring \u7A0B\u5E8F\u3002</p><ol start="5"><li>\u5FEB\u901F\u96C6\u6210\u529F\u80FD</li></ol><p>\u65B9\u4FBF\u96C6\u6210\u5404\u79CD\u4F18\u79C0\u6846\u67B6\uFF0CSpring \u4E0D\u6392\u65A5\u5404\u79CD\u4F18\u79C0\u7684\u5F00\u6E90\u6846\u67B6\uFF0C\u5176\u5185\u90E8\u63D0\u4F9B\u4E86\u5BF9\u5404\u79CD\u4F18\u79C0\u6846\u67B6\uFF08\u5982\uFF1AStruts\u3001Hibernate\u3001MyBatis\u3001Quartz \u7B49\uFF09\u7684\u76F4\u63A5\u652F\u6301\u3002</p><ol start="6"><li>\u590D\u6742 API \u6A21\u677F\u5C01\u88C5</li></ol><p>Spring \u5BF9 JavaEE \u5F00\u53D1\u4E2D\u975E\u5E38\u96BE\u7528\u7684\u4E00\u4E9B API\uFF08JDBC\u3001JavaMail\u3001\u8FDC\u7A0B\u8C03\u7528\u7B49\uFF09\u90FD\u63D0\u4F9B\u4E86\u6A21\u677F\u5316\u7684\u5C01\u88C5\uFF0C\u8FD9\u4E9B\u5C01\u88C5 API \u7684\u63D0\u4F9B\u4F7F\u5F97\u5E94\u7528\u96BE\u5EA6\u5927\u5927\u964D\u4F4E\u3002</p><h3 id="_2-spring-\u6709\u54EA\u4E9B\u6A21\u5757\u5462" tabindex="-1"><a class="header-anchor" href="#_2-spring-\u6709\u54EA\u4E9B\u6A21\u5757\u5462" aria-hidden="true">#</a> 2.Spring \u6709\u54EA\u4E9B\u6A21\u5757\u5462\uFF1F</h3><p>Spring \u6846\u67B6\u662F\u5206\u6A21\u5757\u5B58\u5728\uFF0C\u9664\u4E86\u6700\u6838\u5FC3\u7684<code>Spring Core Container</code>\u662F\u5FC5\u8981\u6A21\u5757\u4E4B\u5916\uFF0C\u5176\u4ED6\u6A21\u5757\u90FD\u662F<code>\u53EF\u9009</code>\uFF0C\u5927\u7EA6\u6709 20 \u591A\u4E2A\u6A21\u5757\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-bb7c13ea-3174-4b32-84b8-821849ddc377.png" alt="Spring\u6A21\u5757\u5212\u5206"></p><p>\u6700\u4E3B\u8981\u7684\u4E03\u5927\u6A21\u5757\uFF1A</p><ol><li><strong>Spring Core</strong>\uFF1ASpring \u6838\u5FC3\uFF0C\u5B83\u662F\u6846\u67B6\u6700\u57FA\u7840\u7684\u90E8\u5206\uFF0C\u63D0\u4F9B IOC \u548C\u4F9D\u8D56\u6CE8\u5165 DI \u7279\u6027\u3002</li><li><strong>Spring Context</strong>\uFF1ASpring \u4E0A\u4E0B\u6587\u5BB9\u5668\uFF0C\u5B83\u662F BeanFactory \u529F\u80FD\u52A0\u5F3A\u7684\u4E00\u4E2A\u5B50\u63A5\u53E3\u3002</li><li><strong>Spring Web</strong>\uFF1A\u5B83\u63D0\u4F9B Web \u5E94\u7528\u5F00\u53D1\u7684\u652F\u6301\u3002</li><li><strong>Spring MVC</strong>\uFF1A\u5B83\u9488\u5BF9 Web \u5E94\u7528\u4E2D MVC \u601D\u60F3\u7684\u5B9E\u73B0\u3002</li><li><strong>Spring DAO</strong>\uFF1A\u63D0\u4F9B\u5BF9 JDBC \u62BD\u8C61\u5C42\uFF0C\u7B80\u5316\u4E86 JDBC \u7F16\u7801\uFF0C\u540C\u65F6\uFF0C\u7F16\u7801\u66F4\u5177\u6709\u5065\u58EE\u6027\u3002</li><li><strong>Spring ORM</strong>\uFF1A\u5B83\u652F\u6301\u7528\u4E8E\u6D41\u884C\u7684 ORM \u6846\u67B6\u7684\u6574\u5408\uFF0C\u6BD4\u5982\uFF1ASpring + Hibernate\u3001Spring + iBatis\u3001Spring + JDO \u7684\u6574\u5408\u7B49\u3002</li><li><strong>Spring AOP</strong>\uFF1A\u5373\u9762\u5411\u5207\u9762\u7F16\u7A0B\uFF0C\u5B83\u63D0\u4F9B\u4E86\u4E0E AOP \u8054\u76DF\u517C\u5BB9\u7684\u7F16\u7A0B\u5B9E\u73B0\u3002</li></ol><h3 id="_3-spring-\u6709\u54EA\u4E9B\u5E38\u7528\u6CE8\u89E3\u5462" tabindex="-1"><a class="header-anchor" href="#_3-spring-\u6709\u54EA\u4E9B\u5E38\u7528\u6CE8\u89E3\u5462" aria-hidden="true">#</a> 3.Spring \u6709\u54EA\u4E9B\u5E38\u7528\u6CE8\u89E3\u5462\uFF1F</h3><p>Spring \u6709\u5F88\u591A\u6A21\u5757\uFF0C\u751A\u81F3\u5E7F\u4E49\u7684 SpringBoot\u3001SpringCloud \u4E5F\u7B97\u662F Spring \u7684\u4E00\u90E8\u5206\uFF0C\u6211\u4EEC\u6765\u5206\u6A21\u5757\uFF0C\u6309\u529F\u80FD\u6765\u770B\u4E00\u4E0B\u4E00\u4E9B\u5E38\u7528\u7684\u6CE8\u89E3\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-8d0a1518-a425-4887-9735-45321095d927.png" alt="Spring\u5E38\u7528\u6CE8\u89E3"></p><p><strong>Web</strong>:</p><ul><li>@Controller\uFF1A\u7EC4\u5408\u6CE8\u89E3\uFF08\u7EC4\u5408\u4E86@Component \u6CE8\u89E3\uFF09\uFF0C\u5E94\u7528\u5728 MVC \u5C42\uFF08\u63A7\u5236\u5C42\uFF09\u3002</li><li>@RestController\uFF1A\u8BE5\u6CE8\u89E3\u4E3A\u4E00\u4E2A\u7EC4\u5408\u6CE8\u89E3\uFF0C\u76F8\u5F53\u4E8E@Controller \u548C@ResponseBody \u7684\u7EC4\u5408\uFF0C\u6CE8\u89E3\u5728\u7C7B\u4E0A\uFF0C\u610F\u5473\u7740\uFF0C\u8BE5 Controller \u7684\u6240\u6709\u65B9\u6CD5\u90FD\u9ED8\u8BA4\u52A0\u4E0A\u4E86@ResponseBody\u3002</li><li>@RequestMapping\uFF1A\u7528\u4E8E\u6620\u5C04 Web \u8BF7\u6C42\uFF0C\u5305\u62EC\u8BBF\u95EE\u8DEF\u5F84\u548C\u53C2\u6570\u3002\u5982\u679C\u662F Restful \u98CE\u683C\u63A5\u53E3\uFF0C\u8FD8\u53EF\u4EE5\u6839\u636E\u8BF7\u6C42\u7C7B\u578B\u4F7F\u7528\u4E0D\u540C\u7684\u6CE8\u89E3\uFF1A <ul><li>@GetMapping</li><li>@PostMapping</li><li>@PutMapping</li><li>@DeleteMapping</li></ul></li><li>@ResponseBody\uFF1A\u652F\u6301\u5C06\u8FD4\u56DE\u503C\u653E\u5728 response \u5185\uFF0C\u800C\u4E0D\u662F\u4E00\u4E2A\u9875\u9762\uFF0C\u901A\u5E38\u7528\u6237\u8FD4\u56DE json \u6570\u636E\u3002</li><li>@RequestBody\uFF1A\u5141\u8BB8 request \u7684\u53C2\u6570\u5728 request \u4F53\u4E2D\uFF0C\u800C\u4E0D\u662F\u5728\u76F4\u63A5\u8FDE\u63A5\u5728\u5730\u5740\u540E\u9762\u3002</li><li>@PathVariable\uFF1A\u7528\u4E8E\u63A5\u6536\u8DEF\u5F84\u53C2\u6570\uFF0C\u6BD4\u5982 <code>@RequestMapping(\u201C/hello/{name}\u201D)</code>\u7533\u660E\u7684\u8DEF\u5F84\uFF0C\u5C06\u6CE8\u89E3\u653E\u5728\u53C2\u6570\u4E2D\u524D\uFF0C\u5373\u53EF\u83B7\u53D6\u8BE5\u503C\uFF0C\u901A\u5E38\u4F5C\u4E3A Restful \u7684\u63A5\u53E3\u5B9E\u73B0\u65B9\u6CD5\u3002</li><li>@RestController\uFF1A\u8BE5\u6CE8\u89E3\u4E3A\u4E00\u4E2A\u7EC4\u5408\u6CE8\u89E3\uFF0C\u76F8\u5F53\u4E8E@Controller \u548C@ResponseBody \u7684\u7EC4\u5408\uFF0C\u6CE8\u89E3\u5728\u7C7B\u4E0A\uFF0C\u610F\u5473\u7740\uFF0C\u8BE5 Controller \u7684\u6240\u6709\u65B9\u6CD5\u90FD\u9ED8\u8BA4\u52A0\u4E0A\u4E86@ResponseBody\u3002</li></ul><p><strong>\u5BB9\u5668</strong>:</p><ul><li>@Component\uFF1A\u8868\u793A\u4E00\u4E2A\u5E26\u6CE8\u91CA\u7684\u7C7B\u662F\u4E00\u4E2A\u201C\u7EC4\u4EF6\u201D\uFF0C\u6210\u4E3A Spring \u7BA1\u7406\u7684 Bean\u3002\u5F53\u4F7F\u7528\u57FA\u4E8E\u6CE8\u89E3\u7684\u914D\u7F6E\u548C\u7C7B\u8DEF\u5F84\u626B\u63CF\u65F6\uFF0C\u8FD9\u4E9B\u7C7B\u88AB\u89C6\u4E3A\u81EA\u52A8\u68C0\u6D4B\u7684\u5019\u9009\u5BF9\u8C61\u3002\u540C\u65F6@Component \u8FD8\u662F\u4E00\u4E2A\u5143\u6CE8\u89E3\u3002</li><li>@Service\uFF1A\u7EC4\u5408\u6CE8\u89E3\uFF08\u7EC4\u5408\u4E86@Component \u6CE8\u89E3\uFF09\uFF0C\u5E94\u7528\u5728 service \u5C42\uFF08\u4E1A\u52A1\u903B\u8F91\u5C42\uFF09\u3002</li><li>@Repository\uFF1A\u7EC4\u5408\u6CE8\u89E3\uFF08\u7EC4\u5408\u4E86@Component \u6CE8\u89E3\uFF09\uFF0C\u5E94\u7528\u5728 dao \u5C42\uFF08\u6570\u636E\u8BBF\u95EE\u5C42\uFF09\u3002</li><li>@Autowired\uFF1ASpring \u63D0\u4F9B\u7684\u5DE5\u5177\uFF08\u7531 Spring \u7684\u4F9D\u8D56\u6CE8\u5165\u5DE5\u5177\uFF08BeanPostProcessor\u3001BeanFactoryPostProcessor\uFF09\u81EA\u52A8\u6CE8\u5165\uFF09\u3002</li><li>@Qualifier\uFF1A\u8BE5\u6CE8\u89E3\u901A\u5E38\u8DDF @Autowired \u4E00\u8D77\u4F7F\u7528\uFF0C\u5F53\u60F3\u5BF9\u6CE8\u5165\u7684\u8FC7\u7A0B\u505A\u66F4\u591A\u7684\u63A7\u5236\uFF0C@Qualifier \u53EF\u5E2E\u52A9\u914D\u7F6E\uFF0C\u6BD4\u5982\u4E24\u4E2A\u4EE5\u4E0A\u76F8\u540C\u7C7B\u578B\u7684 Bean \u65F6 Spring \u65E0\u6CD5\u6289\u62E9\uFF0C\u7528\u5230\u6B64\u6CE8\u89E3</li><li>@Configuration\uFF1A\u58F0\u660E\u5F53\u524D\u7C7B\u662F\u4E00\u4E2A\u914D\u7F6E\u7C7B\uFF08\u76F8\u5F53\u4E8E\u4E00\u4E2A Spring \u914D\u7F6E\u7684 xml \u6587\u4EF6\uFF09</li><li>@Value\uFF1A\u53EF\u7528\u5728\u5B57\u6BB5\uFF0C\u6784\u9020\u5668\u53C2\u6570\u8DDF\u65B9\u6CD5\u53C2\u6570\uFF0C\u6307\u5B9A\u4E00\u4E2A\u9ED8\u8BA4\u503C\uFF0C\u652F\u6301 <code>#{} \u8DDF \\\${}</code> \u4E24\u4E2A\u65B9\u5F0F\u3002\u4E00\u822C\u5C06 SpringbBoot \u4E2D\u7684 application.properties \u914D\u7F6E\u7684\u5C5E\u6027\u503C\u8D4B\u503C\u7ED9\u53D8\u91CF\u3002</li><li>@Bean\uFF1A\u6CE8\u89E3\u5728\u65B9\u6CD5\u4E0A\uFF0C\u58F0\u660E\u5F53\u524D\u65B9\u6CD5\u7684\u8FD4\u56DE\u503C\u4E3A\u4E00\u4E2A Bean\u3002\u8FD4\u56DE\u7684 Bean \u5BF9\u5E94\u7684\u7C7B\u4E2D\u53EF\u4EE5\u5B9A\u4E49 init()\u65B9\u6CD5\u548C destroy()\u65B9\u6CD5\uFF0C\u7136\u540E\u5728<code>@Bean(initMethod=\u201Dinit\u201D,destroyMethod=\u201Ddestroy\u201D)</code>\u5B9A\u4E49\uFF0C\u5728\u6784\u9020\u4E4B\u540E\u6267\u884C init\uFF0C\u5728\u9500\u6BC1\u4E4B\u524D\u6267\u884C destroy\u3002</li><li>@Scope:\u5B9A\u4E49\u6211\u4EEC\u91C7\u7528\u4EC0\u4E48\u6A21\u5F0F\u53BB\u521B\u5EFA Bean\uFF08\u65B9\u6CD5\u4E0A\uFF0C\u5F97\u6709@Bean\uFF09 \u5176\u8BBE\u7F6E\u7C7B\u578B\u5305\u62EC\uFF1ASingleton \u3001Prototype\u3001Request \u3001 Session\u3001GlobalSession\u3002</li></ul><p><strong>AOP</strong>:</p><ul><li>@Aspect:\u58F0\u660E\u4E00\u4E2A\u5207\u9762\uFF08\u7C7B\u4E0A\uFF09 \u4F7F\u7528@After\u3001@Before\u3001@Around \u5B9A\u4E49\u5EFA\u8A00\uFF08advice\uFF09\uFF0C\u53EF\u76F4\u63A5\u5C06\u62E6\u622A\u89C4\u5219\uFF08\u5207\u70B9\uFF09\u4F5C\u4E3A\u53C2\u6570\u3002 <ul><li><code>@After</code> \uFF1A\u5728\u65B9\u6CD5\u6267\u884C\u4E4B\u540E\u6267\u884C\uFF08\u65B9\u6CD5\u4E0A\uFF09\u3002</li><li><code>@Before</code>\uFF1A \u5728\u65B9\u6CD5\u6267\u884C\u4E4B\u524D\u6267\u884C\uFF08\u65B9\u6CD5\u4E0A\uFF09\u3002</li><li><code>@Around</code>\uFF1A \u5728\u65B9\u6CD5\u6267\u884C\u4E4B\u524D\u4E0E\u4E4B\u540E\u6267\u884C\uFF08\u65B9\u6CD5\u4E0A\uFF09\u3002</li><li><code>@PointCut</code>\uFF1A \u58F0\u660E\u5207\u70B9 \u5728 java \u914D\u7F6E\u7C7B\u4E2D\u4F7F\u7528@EnableAspectJAutoProxy \u6CE8\u89E3\u5F00\u542F Spring \u5BF9 AspectJ \u4EE3\u7406\u7684\u652F\u6301\uFF08\u7C7B\u4E0A\uFF09\u3002</li></ul></li></ul><p><strong>\u4E8B\u52A1\uFF1A</strong></p><ul><li>@Transactional\uFF1A\u5728\u8981\u5F00\u542F\u4E8B\u52A1\u7684\u65B9\u6CD5\u4E0A\u4F7F\u7528@Transactional \u6CE8\u89E3\uFF0C\u5373\u53EF\u58F0\u660E\u5F0F\u5F00\u542F\u4E8B\u52A1\u3002</li></ul><h3 id="_4-spring-\u4E2D\u5E94\u7528\u4E86\u54EA\u4E9B\u8BBE\u8BA1\u6A21\u5F0F\u5462" tabindex="-1"><a class="header-anchor" href="#_4-spring-\u4E2D\u5E94\u7528\u4E86\u54EA\u4E9B\u8BBE\u8BA1\u6A21\u5F0F\u5462" aria-hidden="true">#</a> 4.Spring \u4E2D\u5E94\u7528\u4E86\u54EA\u4E9B\u8BBE\u8BA1\u6A21\u5F0F\u5462\uFF1F</h3><p>Spring \u6846\u67B6\u4E2D\u5E7F\u6CDB\u4F7F\u7528\u4E86\u4E0D\u540C\u7C7B\u578B\u7684\u8BBE\u8BA1\u6A21\u5F0F\uFF0C\u4E0B\u9762\u6211\u4EEC\u6765\u770B\u770B\u5230\u5E95\u6709\u54EA\u4E9B\u8BBE\u8BA1\u6A21\u5F0F?</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-ee1c5cee-8462-4bae-93ea-ec936cc77640.png" alt="Spring\u4E2D\u7528\u5230\u7684\u8BBE\u8BA1\u6A21\u5F0F"></p><ol><li><strong>\u5DE5\u5382\u6A21\u5F0F</strong> : Spring \u5BB9\u5668\u672C\u8D28\u662F\u4E00\u4E2A\u5927\u5DE5\u5382\uFF0C\u4F7F\u7528\u5DE5\u5382\u6A21\u5F0F\u901A\u8FC7 BeanFactory\u3001ApplicationContext \u521B\u5EFA bean \u5BF9\u8C61\u3002</li><li><strong>\u4EE3\u7406\u6A21\u5F0F</strong> : Spring AOP \u529F\u80FD\u529F\u80FD\u5C31\u662F\u901A\u8FC7\u4EE3\u7406\u6A21\u5F0F\u6765\u5B9E\u73B0\u7684\uFF0C\u5206\u4E3A\u52A8\u6001\u4EE3\u7406\u548C\u9759\u6001\u4EE3\u7406\u3002</li><li><strong>\u5355\u4F8B\u6A21\u5F0F</strong> : Spring \u4E2D\u7684 Bean \u9ED8\u8BA4\u90FD\u662F\u5355\u4F8B\u7684\uFF0C\u8FD9\u6837\u6709\u5229\u4E8E\u5BB9\u5668\u5BF9 Bean \u7684\u7BA1\u7406\u3002</li><li><strong>\u6A21\u677F\u6A21\u5F0F</strong> : Spring \u4E2D JdbcTemplate\u3001RestTemplate \u7B49\u4EE5 Template \u7ED3\u5C3E\u7684\u5BF9\u6570\u636E\u5E93\u3001\u7F51\u7EDC\u7B49\u7B49\u8FDB\u884C\u64CD\u4F5C\u7684\u6A21\u677F\u7C7B\uFF0C\u5C31\u4F7F\u7528\u5230\u4E86\u6A21\u677F\u6A21\u5F0F\u3002</li><li><strong>\u89C2\u5BDF\u8005\u6A21\u5F0F</strong>: Spring \u4E8B\u4EF6\u9A71\u52A8\u6A21\u578B\u5C31\u662F\u89C2\u5BDF\u8005\u6A21\u5F0F\u5F88\u7ECF\u5178\u7684\u4E00\u4E2A\u5E94\u7528\u3002</li><li><strong>\u9002\u914D\u5668\u6A21\u5F0F</strong> :Spring AOP \u7684\u589E\u5F3A\u6216\u901A\u77E5 (Advice) \u4F7F\u7528\u5230\u4E86\u9002\u914D\u5668\u6A21\u5F0F\u3001Spring MVC \u4E2D\u4E5F\u662F\u7528\u5230\u4E86\u9002\u914D\u5668\u6A21\u5F0F\u9002\u914D Controller\u3002</li><li><strong>\u7B56\u7565\u6A21\u5F0F</strong>\uFF1ASpring \u4E2D\u6709\u4E00\u4E2A Resource \u63A5\u53E3\uFF0C\u5B83\u7684\u4E0D\u540C\u5B9E\u73B0\u7C7B\uFF0C\u4F1A\u6839\u636E\u4E0D\u540C\u7684\u7B56\u7565\u53BB\u8BBF\u95EE\u8D44\u6E90\u3002</li></ol><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><h2 id="ioc" tabindex="-1"><a class="header-anchor" href="#ioc" aria-hidden="true">#</a> IOC</h2><h3 id="_5-\u8BF4\u4E00\u8BF4\u4EC0\u4E48\u662F-ioc-\u4EC0\u4E48\u662F-di" tabindex="-1"><a class="header-anchor" href="#_5-\u8BF4\u4E00\u8BF4\u4EC0\u4E48\u662F-ioc-\u4EC0\u4E48\u662F-di" aria-hidden="true">#</a> 5.\u8BF4\u4E00\u8BF4\u4EC0\u4E48\u662F IOC\uFF1F\u4EC0\u4E48\u662F DI?</h3><p>Java \u662F\u9762\u5411\u5BF9\u8C61\u7684\u7F16\u7A0B\u8BED\u8A00\uFF0C\u4E00\u4E2A\u4E2A\u5B9E\u4F8B\u5BF9\u8C61\u76F8\u4E92\u5408\u4F5C\u7EC4\u6210\u4E86\u4E1A\u52A1\u903B\u8F91\uFF0C\u539F\u6765\uFF0C\u6211\u4EEC\u90FD\u662F\u5728\u4EE3\u7801\u91CC\u521B\u5EFA\u5BF9\u8C61\u548C\u5BF9\u8C61\u7684\u4F9D\u8D56\u3002</p><p>\u6240\u8C13\u7684<strong>IOC</strong>\uFF08\u63A7\u5236\u53CD\u8F6C\uFF09\uFF1A\u5C31\u662F\u7531\u5BB9\u5668\u6765\u8D1F\u8D23\u63A7\u5236\u5BF9\u8C61\u7684\u751F\u547D\u5468\u671F\u548C\u5BF9\u8C61\u95F4\u7684\u5173\u7CFB\u3002\u4EE5\u524D\u662F\u6211\u4EEC\u60F3\u8981\u4EC0\u4E48\uFF0C\u5C31\u81EA\u5DF1\u521B\u5EFA\u4EC0\u4E48\uFF0C\u73B0\u5728\u662F\u6211\u4EEC\u9700\u8981\u4EC0\u4E48\uFF0C\u5BB9\u5668\u5C31\u7ED9\u6211\u4EEC\u9001\u6765\u4EC0\u4E48\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-619da277-c15e-4dd7-9f2b-dbd809a9aaa0.png" alt="\u5F15\u5165IOC\u4E4B\u524D\u548C\u5F15\u5165IOC\u4E4B\u540E"></p><p>\u4E5F\u5C31\u662F\u8BF4\uFF0C\u63A7\u5236\u5BF9\u8C61\u751F\u547D\u5468\u671F\u7684\u4E0D\u518D\u662F\u5F15\u7528\u5B83\u7684\u5BF9\u8C61\uFF0C\u800C\u662F\u5BB9\u5668\u3002\u5BF9\u5177\u4F53\u5BF9\u8C61\uFF0C\u4EE5\u524D\u662F\u5B83\u63A7\u5236\u5176\u5B83\u5BF9\u8C61\uFF0C\u73B0\u5728\u6240\u6709\u5BF9\u8C61\u90FD\u88AB\u5BB9\u5668\u63A7\u5236\uFF0C\u6240\u4EE5\u8FD9\u5C31\u53EB<strong>\u63A7\u5236\u53CD\u8F6C</strong>\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-440f5d0e-f4db-462c-97fb-d54407a354d5.png" alt="\u63A7\u5236\u53CD\u8F6C\u793A\u610F\u56FE"></p><p><strong>DI\uFF08\u4F9D\u8D56\u6CE8\u5165\uFF09</strong>\uFF1A\u6307\u7684\u662F\u5BB9\u5668\u5728\u5B9E\u4F8B\u5316\u5BF9\u8C61\u7684\u65F6\u5019\u628A\u5B83\u4F9D\u8D56\u7684\u7C7B\u6CE8\u5165\u7ED9\u5B83\u3002\u6709\u7684\u8BF4\u6CD5 IOC \u548C DI \u662F\u4E00\u56DE\u4E8B\uFF0C\u6709\u7684\u8BF4\u6CD5\u662F IOC \u662F\u601D\u60F3\uFF0CDI \u662F IOC \u7684\u5B9E\u73B0\u3002</p><blockquote><p><strong>\u4E3A\u4EC0\u4E48\u8981\u4F7F\u7528 IOC \u5462\uFF1F</strong></p></blockquote><p>\u6700\u4E3B\u8981\u7684\u662F\u4E24\u4E2A\u5B57<strong>\u89E3\u8026</strong>\uFF0C\u786C\u7F16\u7801\u4F1A\u9020\u6210\u5BF9\u8C61\u95F4\u7684\u8FC7\u5EA6\u8026\u5408\uFF0C\u4F7F\u7528 IOC \u4E4B\u540E\uFF0C\u6211\u4EEC\u53EF\u4EE5\u4E0D\u7528\u5173\u5FC3\u5BF9\u8C61\u95F4\u7684\u4F9D\u8D56\uFF0C\u4E13\u5FC3\u5F00\u53D1\u5E94\u7528\u5C31\u884C\u3002</p><h3 id="_6-\u80FD\u7B80\u5355\u8BF4\u4E00\u4E0B-spring-ioc-\u7684\u5B9E\u73B0\u673A\u5236\u5417" tabindex="-1"><a class="header-anchor" href="#_6-\u80FD\u7B80\u5355\u8BF4\u4E00\u4E0B-spring-ioc-\u7684\u5B9E\u73B0\u673A\u5236\u5417" aria-hidden="true">#</a> 6.\u80FD\u7B80\u5355\u8BF4\u4E00\u4E0B Spring IOC \u7684\u5B9E\u73B0\u673A\u5236\u5417\uFF1F</h3><p>PS:\u8FD9\u9053\u9898\u8001\u4E09\u5728\u9762\u8BD5\u4E2D\u88AB\u95EE\u5230\u8FC7\uFF0C\u95EE\u6CD5\u662F\u201C<strong>\u4F60\u6709\u81EA\u5DF1\u5B9E\u73B0\u8FC7\u7B80\u5355\u7684 Spring \u5417\uFF1F</strong>\u201D</p><p>Spring \u7684 IOC \u672C\u8D28\u5C31\u662F\u4E00\u4E2A\u5927\u5DE5\u5382\uFF0C\u6211\u4EEC\u60F3\u60F3\u4E00\u4E2A\u5DE5\u5382\u662F\u600E\u4E48\u8FD0\u884C\u7684\u5462\uFF1F</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-7678c40f-a48d-4bd5-80f8-e902ad688e11.png" alt="\u5DE5\u5382\u8FD0\u884C"></p><ul><li><p><strong>\u751F\u4EA7\u4EA7\u54C1</strong>\uFF1A\u4E00\u4E2A\u5DE5\u5382\u6700\u6838\u5FC3\u7684\u529F\u80FD\u5C31\u662F\u751F\u4EA7\u4EA7\u54C1\u3002\u5728 Spring \u91CC\uFF0C\u4E0D\u7528 Bean \u81EA\u5DF1\u6765\u5B9E\u4F8B\u5316\uFF0C\u800C\u662F\u4EA4\u7ED9 Spring\uFF0C\u5E94\u8BE5\u600E\u4E48\u5B9E\u73B0\u5462\uFF1F\u2014\u2014\u7B54\u6848\u6BEB\u65E0\u7591\u95EE\uFF0C<strong>\u53CD\u5C04</strong>\u3002</p><p>\u90A3\u4E48\u8FD9\u4E2A\u5382\u5B50\u7684\u751F\u4EA7\u7BA1\u7406\u662F\u600E\u4E48\u505A\u7684\uFF1F\u4F60\u5E94\u8BE5\u4E5F\u77E5\u9053\u2014\u2014<strong>\u5DE5\u5382\u6A21\u5F0F</strong>\u3002</p></li><li><p><strong>\u5E93\u5B58\u4EA7\u54C1</strong>\uFF1A\u5DE5\u5382\u4E00\u822C\u90FD\u662F\u6709\u5E93\u623F\u7684\uFF0C\u7528\u6765\u5E93\u5B58\u4EA7\u54C1\uFF0C\u6BD5\u7ADF\u751F\u4EA7\u7684\u4EA7\u54C1\u4E0D\u80FD\u7ACB\u9A6C\u5C31\u62C9\u8D70\u3002Spring \u6211\u4EEC\u90FD\u77E5\u9053\u662F\u4E00\u4E2A\u5BB9\u5668\uFF0C\u8FD9\u4E2A\u5BB9\u5668\u91CC\u5B58\u7684\u5C31\u662F\u5BF9\u8C61\uFF0C\u4E0D\u80FD\u6BCF\u6B21\u6765\u53D6\u5BF9\u8C61\uFF0C\u90FD\u5F97\u73B0\u573A\u6765\u53CD\u5C04\u521B\u5EFA\u5BF9\u8C61\uFF0C\u5F97\u628A\u521B\u5EFA\u51FA\u7684\u5BF9\u8C61\u5B58\u8D77\u6765\u3002</p></li><li><p><strong>\u8BA2\u5355\u5904\u7406</strong>\uFF1A\u8FD8\u6709\u6700\u91CD\u8981\u7684\u4E00\u70B9\uFF0C\u5DE5\u5382\u6839\u636E\u4EC0\u4E48\u6765\u63D0\u4F9B\u4EA7\u54C1\u5462\uFF1F\u8BA2\u5355\u3002\u8FD9\u4E9B\u8BA2\u5355\u53EF\u80FD\u4E94\u82B1\u516B\u95E8\uFF0C\u6709\u7EBF\u4E0A\u7B7E\u7B7E\u7684\u3001\u6709\u5230\u5DE5\u5382\u7B7E\u7684\u3001\u8FD8\u6709\u5DE5\u5382\u9500\u552E\u4E0A\u95E8\u7B7E\u7684\u2026\u2026\u6700\u540E\u7ECF\u8FC7\u5904\u7406\uFF0C\u6307\u5BFC\u5DE5\u5382\u7684\u51FA\u8D27\u3002</p><p>\u5728 Spring \u91CC\uFF0C\u4E5F\u6709\u8FD9\u6837\u7684\u8BA2\u5355\uFF0C\u5B83\u5C31\u662F\u6211\u4EEC bean \u7684\u5B9A\u4E49\u548C\u4F9D\u8D56\u5173\u7CFB\uFF0C\u53EF\u4EE5\u662F xml \u5F62\u5F0F\uFF0C\u4E5F\u53EF\u4EE5\u662F\u6211\u4EEC\u6700\u719F\u6089\u7684\u6CE8\u89E3\u5F62\u5F0F\u3002</p></li></ul><p>\u6211\u4EEC\u7B80\u5355\u5730\u5B9E\u73B0\u4E00\u4E2A mini \u7248\u7684 Spring IOC\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-1d55c63d-2d12-43b1-9f43-428f5f4a1413.png" alt="mini\u7248\u672CSpring IOC"></p><p><strong>Bean \u5B9A\u4E49\uFF1A</strong></p><p>Bean \u901A\u8FC7\u4E00\u4E2A\u914D\u7F6E\u6587\u4EF6\u5B9A\u4E49\uFF0C\u628A\u5B83\u89E3\u6790\u6210\u4E00\u4E2A\u7C7B\u578B\u3002</p><ul><li><p>beans.properties</p><p>\u5077\u61D2\uFF0C\u8FD9\u91CC\u76F4\u63A5\u7528\u4E86\u6700\u65B9\u4FBF\u89E3\u6790\u7684 properties\uFF0C\u8FD9\u91CC\u76F4\u63A5\u7528\u4E00\u4E2A<code>&lt;key,value&gt;</code>\u7C7B\u578B\u7684\u914D\u7F6E\u6765\u4EE3\u8868 Bean \u7684\u5B9A\u4E49\uFF0C\u5176\u4E2D key \u662F beanName\uFF0Cvalue \u662F class</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code>userDao<span class="token operator">:</span><span class="token class-name"><span class="token namespace">cn<span class="token punctuation">.</span>fighter3<span class="token punctuation">.</span>bean<span class="token punctuation">.</span></span>UserDao</span>
+import{_ as p}from"./plugin-vue_export-helper.21dcd24c.js";import{r as o,o as c,c as i,a as s,b as t,d as n,e}from"./app.615e41d8.js";const l={},r=s("h1",{id:"\u9762\u6E23\u9006\u88AD-spring-\u5FC5\u770B",tabindex:"-1"},[s("a",{class:"header-anchor",href:"#\u9762\u6E23\u9006\u88AD-spring-\u5FC5\u770B","aria-hidden":"true"},"#"),n(" \u9762\u6E23\u9006\u88AD\uFF08Spring\uFF09\u5FC5\u770B\u{1F44D}")],-1),u=n("\u56FE\u6587\u8BE6\u89E3 35 \u9053Spring\u9762\u8BD5\u9AD8\u9891\u9898\uFF0C\u8FD9\u6B21\u540A\u6253\u9762\u8BD5\u5B98\uFF0C\u6211\u89C9\u5F97\u7A33\u4E86\uFF08\u624B\u52A8 dog\uFF09\u3002\u6574\u7406\uFF1A\u6C89\u9ED8\u738B\u4E8C\uFF0C\u6233"),d={href:"https://mp.weixin.qq.com/s/EQge6DmgIqYITM3mAxkatg",target:"_blank",rel:"noopener noreferrer"},k=n("\u8F6C\u8F7D\u94FE\u63A5"),v=n("\uFF0C\u4F5C\u8005\uFF1A\u4E09\u5206\u6076\uFF0C\u6233"),m={href:"https://mp.weixin.qq.com/s/Y17S85ntHm_MLTZMJdtjQQ",target:"_blank",rel:"noopener noreferrer"},b=n("\u539F\u6587\u94FE\u63A5"),g=n("\u3002"),f=e(`<h2 id="\u57FA\u7840" tabindex="-1"><a class="header-anchor" href="#\u57FA\u7840" aria-hidden="true">#</a> \u57FA\u7840</h2><h3 id="_1-spring-\u662F\u4EC0\u4E48-\u7279\u6027-\u6709\u54EA\u4E9B\u6A21\u5757" tabindex="-1"><a class="header-anchor" href="#_1-spring-\u662F\u4EC0\u4E48-\u7279\u6027-\u6709\u54EA\u4E9B\u6A21\u5757" aria-hidden="true">#</a> 1.Spring \u662F\u4EC0\u4E48\uFF1F\u7279\u6027\uFF1F\u6709\u54EA\u4E9B\u6A21\u5757\uFF1F</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-165c27b4-2ea0-409a-8fa5-389c105db0fa.png" alt="Spring Logo"></p><p>\u4E00\u53E5\u8BDD\u6982\u62EC\uFF1A<strong>Spring \u662F\u4E00\u4E2A\u8F7B\u91CF\u7EA7\u3001\u975E\u5165\u4FB5\u5F0F\u7684\u63A7\u5236\u53CD\u8F6C (IoC) \u548C\u9762\u5411\u5207\u9762 (AOP) \u7684\u6846\u67B6\u3002</strong></p><p>2003 \u5E74\uFF0C\u4E00\u4E2A\u97F3\u4E50\u5BB6 Rod Johnson \u51B3\u5B9A\u53D1\u5C55\u4E00\u4E2A\u8F7B\u91CF\u7EA7\u7684 Java \u5F00\u53D1\u6846\u67B6\uFF0C<code>Spring</code>\u4F5C\u4E3A Java \u6218\u573A\u7684\u9F99\u9A91\u5175\u6E10\u6E10\u5D1B\u8D77\uFF0C\u5E76\u6DD8\u6C70\u4E86<code>EJB</code>\u8FD9\u4E2A\u4F20\u7EDF\u7684\u91CD\u88C5\u9A91\u5175\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-5d9efb93-03a5-400c-8429-3be7c5eeddfb.png" alt="Spring\u91CD\u8981\u7248\u672C"></p><p>\u5230\u4E86\u73B0\u5728\uFF0C\u4F01\u4E1A\u7EA7\u5F00\u53D1\u7684\u6807\u914D\u57FA\u672C\u5C31\u662F <strong>Spring5</strong> + <strong>Spring Boot 2</strong> + <strong>JDK 8</strong></p><blockquote><p>Spring \u6709\u54EA\u4E9B\u7279\u6027\u5462\uFF1F</p></blockquote><p>Spring \u6709\u5F88\u591A\u4F18\u70B9\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-a0f0ef9d-3289-41ea-94c2-34b7e37ef854.png" alt="Spring\u7279\u6027"></p><ol><li><strong>IOC</strong> \u548C <strong>DI</strong> \u7684\u652F\u6301</li></ol><p>Spring \u7684\u6838\u5FC3\u5C31\u662F\u4E00\u4E2A\u5927\u7684\u5DE5\u5382\u5BB9\u5668\uFF0C\u53EF\u4EE5\u7EF4\u62A4\u6240\u6709\u5BF9\u8C61\u7684\u521B\u5EFA\u548C\u4F9D\u8D56\u5173\u7CFB\uFF0CSpring \u5DE5\u5382\u7528\u4E8E\u751F\u6210 Bean\uFF0C\u5E76\u4E14\u7BA1\u7406 Bean \u7684\u751F\u547D\u5468\u671F\uFF0C\u5B9E\u73B0<strong>\u9AD8\u5185\u805A\u4F4E\u8026\u5408</strong>\u7684\u8BBE\u8BA1\u7406\u5FF5\u3002</p><ol start="2"><li>AOP \u7F16\u7A0B\u7684\u652F\u6301</li></ol><p>Spring \u63D0\u4F9B\u4E86<strong>\u9762\u5411\u5207\u9762\u7F16\u7A0B</strong>\uFF0C\u53EF\u4EE5\u65B9\u4FBF\u7684\u5B9E\u73B0\u5BF9\u7A0B\u5E8F\u8FDB\u884C\u6743\u9650\u62E6\u622A\u3001\u8FD0\u884C\u76D1\u63A7\u7B49\u5207\u9762\u529F\u80FD\u3002</p><ol start="3"><li>\u58F0\u660E\u5F0F\u4E8B\u52A1\u7684\u652F\u6301</li></ol><p>\u652F\u6301\u901A\u8FC7\u914D\u7F6E\u5C31\u6765\u5B8C\u6210\u5BF9\u4E8B\u52A1\u7684\u7BA1\u7406\uFF0C\u800C\u4E0D\u9700\u8981\u901A\u8FC7\u786C\u7F16\u7801\u7684\u65B9\u5F0F\uFF0C\u4EE5\u524D\u91CD\u590D\u7684\u4E00\u4E9B\u4E8B\u52A1\u63D0\u4EA4\u3001\u56DE\u6EDA\u7684 JDBC \u4EE3\u7801\uFF0C\u90FD\u53EF\u4EE5\u4E0D\u7528\u81EA\u5DF1\u5199\u4E86\u3002</p><ol start="4"><li>\u5FEB\u6377\u6D4B\u8BD5\u7684\u652F\u6301</li></ol><p>Spring \u5BF9 Junit \u63D0\u4F9B\u652F\u6301\uFF0C\u53EF\u4EE5\u901A\u8FC7<strong>\u6CE8\u89E3</strong>\u5FEB\u6377\u5730\u6D4B\u8BD5 Spring \u7A0B\u5E8F\u3002</p><ol start="5"><li>\u5FEB\u901F\u96C6\u6210\u529F\u80FD</li></ol><p>\u65B9\u4FBF\u96C6\u6210\u5404\u79CD\u4F18\u79C0\u6846\u67B6\uFF0CSpring \u4E0D\u6392\u65A5\u5404\u79CD\u4F18\u79C0\u7684\u5F00\u6E90\u6846\u67B6\uFF0C\u5176\u5185\u90E8\u63D0\u4F9B\u4E86\u5BF9\u5404\u79CD\u4F18\u79C0\u6846\u67B6\uFF08\u5982\uFF1AStruts\u3001Hibernate\u3001MyBatis\u3001Quartz \u7B49\uFF09\u7684\u76F4\u63A5\u652F\u6301\u3002</p><ol start="6"><li>\u590D\u6742 API \u6A21\u677F\u5C01\u88C5</li></ol><p>Spring \u5BF9 JavaEE \u5F00\u53D1\u4E2D\u975E\u5E38\u96BE\u7528\u7684\u4E00\u4E9B API\uFF08JDBC\u3001JavaMail\u3001\u8FDC\u7A0B\u8C03\u7528\u7B49\uFF09\u90FD\u63D0\u4F9B\u4E86\u6A21\u677F\u5316\u7684\u5C01\u88C5\uFF0C\u8FD9\u4E9B\u5C01\u88C5 API \u7684\u63D0\u4F9B\u4F7F\u5F97\u5E94\u7528\u96BE\u5EA6\u5927\u5927\u964D\u4F4E\u3002</p><h3 id="_2-spring-\u6709\u54EA\u4E9B\u6A21\u5757\u5462" tabindex="-1"><a class="header-anchor" href="#_2-spring-\u6709\u54EA\u4E9B\u6A21\u5757\u5462" aria-hidden="true">#</a> 2.Spring \u6709\u54EA\u4E9B\u6A21\u5757\u5462\uFF1F</h3><p>Spring \u6846\u67B6\u662F\u5206\u6A21\u5757\u5B58\u5728\uFF0C\u9664\u4E86\u6700\u6838\u5FC3\u7684<code>Spring Core Container</code>\u662F\u5FC5\u8981\u6A21\u5757\u4E4B\u5916\uFF0C\u5176\u4ED6\u6A21\u5757\u90FD\u662F<code>\u53EF\u9009</code>\uFF0C\u5927\u7EA6\u6709 20 \u591A\u4E2A\u6A21\u5757\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-bb7c13ea-3174-4b32-84b8-821849ddc377.png" alt="Spring\u6A21\u5757\u5212\u5206"></p><p>\u6700\u4E3B\u8981\u7684\u4E03\u5927\u6A21\u5757\uFF1A</p><ol><li><strong>Spring Core</strong>\uFF1ASpring \u6838\u5FC3\uFF0C\u5B83\u662F\u6846\u67B6\u6700\u57FA\u7840\u7684\u90E8\u5206\uFF0C\u63D0\u4F9B IOC \u548C\u4F9D\u8D56\u6CE8\u5165 DI \u7279\u6027\u3002</li><li><strong>Spring Context</strong>\uFF1ASpring \u4E0A\u4E0B\u6587\u5BB9\u5668\uFF0C\u5B83\u662F BeanFactory \u529F\u80FD\u52A0\u5F3A\u7684\u4E00\u4E2A\u5B50\u63A5\u53E3\u3002</li><li><strong>Spring Web</strong>\uFF1A\u5B83\u63D0\u4F9B Web \u5E94\u7528\u5F00\u53D1\u7684\u652F\u6301\u3002</li><li><strong>Spring MVC</strong>\uFF1A\u5B83\u9488\u5BF9 Web \u5E94\u7528\u4E2D MVC \u601D\u60F3\u7684\u5B9E\u73B0\u3002</li><li><strong>Spring DAO</strong>\uFF1A\u63D0\u4F9B\u5BF9 JDBC \u62BD\u8C61\u5C42\uFF0C\u7B80\u5316\u4E86 JDBC \u7F16\u7801\uFF0C\u540C\u65F6\uFF0C\u7F16\u7801\u66F4\u5177\u6709\u5065\u58EE\u6027\u3002</li><li><strong>Spring ORM</strong>\uFF1A\u5B83\u652F\u6301\u7528\u4E8E\u6D41\u884C\u7684 ORM \u6846\u67B6\u7684\u6574\u5408\uFF0C\u6BD4\u5982\uFF1ASpring + Hibernate\u3001Spring + iBatis\u3001Spring + JDO \u7684\u6574\u5408\u7B49\u3002</li><li><strong>Spring AOP</strong>\uFF1A\u5373\u9762\u5411\u5207\u9762\u7F16\u7A0B\uFF0C\u5B83\u63D0\u4F9B\u4E86\u4E0E AOP \u8054\u76DF\u517C\u5BB9\u7684\u7F16\u7A0B\u5B9E\u73B0\u3002</li></ol><h3 id="_3-spring-\u6709\u54EA\u4E9B\u5E38\u7528\u6CE8\u89E3\u5462" tabindex="-1"><a class="header-anchor" href="#_3-spring-\u6709\u54EA\u4E9B\u5E38\u7528\u6CE8\u89E3\u5462" aria-hidden="true">#</a> 3.Spring \u6709\u54EA\u4E9B\u5E38\u7528\u6CE8\u89E3\u5462\uFF1F</h3><p>Spring \u6709\u5F88\u591A\u6A21\u5757\uFF0C\u751A\u81F3\u5E7F\u4E49\u7684 SpringBoot\u3001SpringCloud \u4E5F\u7B97\u662F Spring \u7684\u4E00\u90E8\u5206\uFF0C\u6211\u4EEC\u6765\u5206\u6A21\u5757\uFF0C\u6309\u529F\u80FD\u6765\u770B\u4E00\u4E0B\u4E00\u4E9B\u5E38\u7528\u7684\u6CE8\u89E3\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-8d0a1518-a425-4887-9735-45321095d927.png" alt="Spring\u5E38\u7528\u6CE8\u89E3"></p><p><strong>Web</strong>:</p><ul><li>@Controller\uFF1A\u7EC4\u5408\u6CE8\u89E3\uFF08\u7EC4\u5408\u4E86@Component \u6CE8\u89E3\uFF09\uFF0C\u5E94\u7528\u5728 MVC \u5C42\uFF08\u63A7\u5236\u5C42\uFF09\u3002</li><li>@RestController\uFF1A\u8BE5\u6CE8\u89E3\u4E3A\u4E00\u4E2A\u7EC4\u5408\u6CE8\u89E3\uFF0C\u76F8\u5F53\u4E8E@Controller \u548C@ResponseBody \u7684\u7EC4\u5408\uFF0C\u6CE8\u89E3\u5728\u7C7B\u4E0A\uFF0C\u610F\u5473\u7740\uFF0C\u8BE5 Controller \u7684\u6240\u6709\u65B9\u6CD5\u90FD\u9ED8\u8BA4\u52A0\u4E0A\u4E86@ResponseBody\u3002</li><li>@RequestMapping\uFF1A\u7528\u4E8E\u6620\u5C04 Web \u8BF7\u6C42\uFF0C\u5305\u62EC\u8BBF\u95EE\u8DEF\u5F84\u548C\u53C2\u6570\u3002\u5982\u679C\u662F Restful \u98CE\u683C\u63A5\u53E3\uFF0C\u8FD8\u53EF\u4EE5\u6839\u636E\u8BF7\u6C42\u7C7B\u578B\u4F7F\u7528\u4E0D\u540C\u7684\u6CE8\u89E3\uFF1A <ul><li>@GetMapping</li><li>@PostMapping</li><li>@PutMapping</li><li>@DeleteMapping</li></ul></li><li>@ResponseBody\uFF1A\u652F\u6301\u5C06\u8FD4\u56DE\u503C\u653E\u5728 response \u5185\uFF0C\u800C\u4E0D\u662F\u4E00\u4E2A\u9875\u9762\uFF0C\u901A\u5E38\u7528\u6237\u8FD4\u56DE json \u6570\u636E\u3002</li><li>@RequestBody\uFF1A\u5141\u8BB8 request \u7684\u53C2\u6570\u5728 request \u4F53\u4E2D\uFF0C\u800C\u4E0D\u662F\u5728\u76F4\u63A5\u8FDE\u63A5\u5728\u5730\u5740\u540E\u9762\u3002</li><li>@PathVariable\uFF1A\u7528\u4E8E\u63A5\u6536\u8DEF\u5F84\u53C2\u6570\uFF0C\u6BD4\u5982 <code>@RequestMapping(\u201C/hello/{name}\u201D)</code>\u7533\u660E\u7684\u8DEF\u5F84\uFF0C\u5C06\u6CE8\u89E3\u653E\u5728\u53C2\u6570\u4E2D\u524D\uFF0C\u5373\u53EF\u83B7\u53D6\u8BE5\u503C\uFF0C\u901A\u5E38\u4F5C\u4E3A Restful \u7684\u63A5\u53E3\u5B9E\u73B0\u65B9\u6CD5\u3002</li><li>@RestController\uFF1A\u8BE5\u6CE8\u89E3\u4E3A\u4E00\u4E2A\u7EC4\u5408\u6CE8\u89E3\uFF0C\u76F8\u5F53\u4E8E@Controller \u548C@ResponseBody \u7684\u7EC4\u5408\uFF0C\u6CE8\u89E3\u5728\u7C7B\u4E0A\uFF0C\u610F\u5473\u7740\uFF0C\u8BE5 Controller \u7684\u6240\u6709\u65B9\u6CD5\u90FD\u9ED8\u8BA4\u52A0\u4E0A\u4E86@ResponseBody\u3002</li></ul><p><strong>\u5BB9\u5668</strong>:</p><ul><li>@Component\uFF1A\u8868\u793A\u4E00\u4E2A\u5E26\u6CE8\u91CA\u7684\u7C7B\u662F\u4E00\u4E2A\u201C\u7EC4\u4EF6\u201D\uFF0C\u6210\u4E3A Spring \u7BA1\u7406\u7684 Bean\u3002\u5F53\u4F7F\u7528\u57FA\u4E8E\u6CE8\u89E3\u7684\u914D\u7F6E\u548C\u7C7B\u8DEF\u5F84\u626B\u63CF\u65F6\uFF0C\u8FD9\u4E9B\u7C7B\u88AB\u89C6\u4E3A\u81EA\u52A8\u68C0\u6D4B\u7684\u5019\u9009\u5BF9\u8C61\u3002\u540C\u65F6@Component \u8FD8\u662F\u4E00\u4E2A\u5143\u6CE8\u89E3\u3002</li><li>@Service\uFF1A\u7EC4\u5408\u6CE8\u89E3\uFF08\u7EC4\u5408\u4E86@Component \u6CE8\u89E3\uFF09\uFF0C\u5E94\u7528\u5728 service \u5C42\uFF08\u4E1A\u52A1\u903B\u8F91\u5C42\uFF09\u3002</li><li>@Repository\uFF1A\u7EC4\u5408\u6CE8\u89E3\uFF08\u7EC4\u5408\u4E86@Component \u6CE8\u89E3\uFF09\uFF0C\u5E94\u7528\u5728 dao \u5C42\uFF08\u6570\u636E\u8BBF\u95EE\u5C42\uFF09\u3002</li><li>@Autowired\uFF1ASpring \u63D0\u4F9B\u7684\u5DE5\u5177\uFF08\u7531 Spring \u7684\u4F9D\u8D56\u6CE8\u5165\u5DE5\u5177\uFF08BeanPostProcessor\u3001BeanFactoryPostProcessor\uFF09\u81EA\u52A8\u6CE8\u5165\uFF09\u3002</li><li>@Qualifier\uFF1A\u8BE5\u6CE8\u89E3\u901A\u5E38\u8DDF @Autowired \u4E00\u8D77\u4F7F\u7528\uFF0C\u5F53\u60F3\u5BF9\u6CE8\u5165\u7684\u8FC7\u7A0B\u505A\u66F4\u591A\u7684\u63A7\u5236\uFF0C@Qualifier \u53EF\u5E2E\u52A9\u914D\u7F6E\uFF0C\u6BD4\u5982\u4E24\u4E2A\u4EE5\u4E0A\u76F8\u540C\u7C7B\u578B\u7684 Bean \u65F6 Spring \u65E0\u6CD5\u6289\u62E9\uFF0C\u7528\u5230\u6B64\u6CE8\u89E3</li><li>@Configuration\uFF1A\u58F0\u660E\u5F53\u524D\u7C7B\u662F\u4E00\u4E2A\u914D\u7F6E\u7C7B\uFF08\u76F8\u5F53\u4E8E\u4E00\u4E2A Spring \u914D\u7F6E\u7684 xml \u6587\u4EF6\uFF09</li><li>@Value\uFF1A\u53EF\u7528\u5728\u5B57\u6BB5\uFF0C\u6784\u9020\u5668\u53C2\u6570\u8DDF\u65B9\u6CD5\u53C2\u6570\uFF0C\u6307\u5B9A\u4E00\u4E2A\u9ED8\u8BA4\u503C\uFF0C\u652F\u6301 <code>#{} \u8DDF \\\${}</code> \u4E24\u4E2A\u65B9\u5F0F\u3002\u4E00\u822C\u5C06 SpringbBoot \u4E2D\u7684 application.properties \u914D\u7F6E\u7684\u5C5E\u6027\u503C\u8D4B\u503C\u7ED9\u53D8\u91CF\u3002</li><li>@Bean\uFF1A\u6CE8\u89E3\u5728\u65B9\u6CD5\u4E0A\uFF0C\u58F0\u660E\u5F53\u524D\u65B9\u6CD5\u7684\u8FD4\u56DE\u503C\u4E3A\u4E00\u4E2A Bean\u3002\u8FD4\u56DE\u7684 Bean \u5BF9\u5E94\u7684\u7C7B\u4E2D\u53EF\u4EE5\u5B9A\u4E49 init()\u65B9\u6CD5\u548C destroy()\u65B9\u6CD5\uFF0C\u7136\u540E\u5728<code>@Bean(initMethod=\u201Dinit\u201D,destroyMethod=\u201Ddestroy\u201D)</code>\u5B9A\u4E49\uFF0C\u5728\u6784\u9020\u4E4B\u540E\u6267\u884C init\uFF0C\u5728\u9500\u6BC1\u4E4B\u524D\u6267\u884C destroy\u3002</li><li>@Scope:\u5B9A\u4E49\u6211\u4EEC\u91C7\u7528\u4EC0\u4E48\u6A21\u5F0F\u53BB\u521B\u5EFA Bean\uFF08\u65B9\u6CD5\u4E0A\uFF0C\u5F97\u6709@Bean\uFF09 \u5176\u8BBE\u7F6E\u7C7B\u578B\u5305\u62EC\uFF1ASingleton \u3001Prototype\u3001Request \u3001 Session\u3001GlobalSession\u3002</li></ul><p><strong>AOP</strong>:</p><ul><li>@Aspect:\u58F0\u660E\u4E00\u4E2A\u5207\u9762\uFF08\u7C7B\u4E0A\uFF09 \u4F7F\u7528@After\u3001@Before\u3001@Around \u5B9A\u4E49\u5EFA\u8A00\uFF08advice\uFF09\uFF0C\u53EF\u76F4\u63A5\u5C06\u62E6\u622A\u89C4\u5219\uFF08\u5207\u70B9\uFF09\u4F5C\u4E3A\u53C2\u6570\u3002 <ul><li><code>@After</code> \uFF1A\u5728\u65B9\u6CD5\u6267\u884C\u4E4B\u540E\u6267\u884C\uFF08\u65B9\u6CD5\u4E0A\uFF09\u3002</li><li><code>@Before</code>\uFF1A \u5728\u65B9\u6CD5\u6267\u884C\u4E4B\u524D\u6267\u884C\uFF08\u65B9\u6CD5\u4E0A\uFF09\u3002</li><li><code>@Around</code>\uFF1A \u5728\u65B9\u6CD5\u6267\u884C\u4E4B\u524D\u4E0E\u4E4B\u540E\u6267\u884C\uFF08\u65B9\u6CD5\u4E0A\uFF09\u3002</li><li><code>@PointCut</code>\uFF1A \u58F0\u660E\u5207\u70B9 \u5728 java \u914D\u7F6E\u7C7B\u4E2D\u4F7F\u7528@EnableAspectJAutoProxy \u6CE8\u89E3\u5F00\u542F Spring \u5BF9 AspectJ \u4EE3\u7406\u7684\u652F\u6301\uFF08\u7C7B\u4E0A\uFF09\u3002</li></ul></li></ul><p><strong>\u4E8B\u52A1\uFF1A</strong></p><ul><li>@Transactional\uFF1A\u5728\u8981\u5F00\u542F\u4E8B\u52A1\u7684\u65B9\u6CD5\u4E0A\u4F7F\u7528@Transactional \u6CE8\u89E3\uFF0C\u5373\u53EF\u58F0\u660E\u5F0F\u5F00\u542F\u4E8B\u52A1\u3002</li></ul><h3 id="_4-spring-\u4E2D\u5E94\u7528\u4E86\u54EA\u4E9B\u8BBE\u8BA1\u6A21\u5F0F\u5462" tabindex="-1"><a class="header-anchor" href="#_4-spring-\u4E2D\u5E94\u7528\u4E86\u54EA\u4E9B\u8BBE\u8BA1\u6A21\u5F0F\u5462" aria-hidden="true">#</a> 4.Spring \u4E2D\u5E94\u7528\u4E86\u54EA\u4E9B\u8BBE\u8BA1\u6A21\u5F0F\u5462\uFF1F</h3><p>Spring \u6846\u67B6\u4E2D\u5E7F\u6CDB\u4F7F\u7528\u4E86\u4E0D\u540C\u7C7B\u578B\u7684\u8BBE\u8BA1\u6A21\u5F0F\uFF0C\u4E0B\u9762\u6211\u4EEC\u6765\u770B\u770B\u5230\u5E95\u6709\u54EA\u4E9B\u8BBE\u8BA1\u6A21\u5F0F?</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-ee1c5cee-8462-4bae-93ea-ec936cc77640.png" alt="Spring\u4E2D\u7528\u5230\u7684\u8BBE\u8BA1\u6A21\u5F0F"></p><ol><li><strong>\u5DE5\u5382\u6A21\u5F0F</strong> : Spring \u5BB9\u5668\u672C\u8D28\u662F\u4E00\u4E2A\u5927\u5DE5\u5382\uFF0C\u4F7F\u7528\u5DE5\u5382\u6A21\u5F0F\u901A\u8FC7 BeanFactory\u3001ApplicationContext \u521B\u5EFA bean \u5BF9\u8C61\u3002</li><li><strong>\u4EE3\u7406\u6A21\u5F0F</strong> : Spring AOP \u529F\u80FD\u529F\u80FD\u5C31\u662F\u901A\u8FC7\u4EE3\u7406\u6A21\u5F0F\u6765\u5B9E\u73B0\u7684\uFF0C\u5206\u4E3A\u52A8\u6001\u4EE3\u7406\u548C\u9759\u6001\u4EE3\u7406\u3002</li><li><strong>\u5355\u4F8B\u6A21\u5F0F</strong> : Spring \u4E2D\u7684 Bean \u9ED8\u8BA4\u90FD\u662F\u5355\u4F8B\u7684\uFF0C\u8FD9\u6837\u6709\u5229\u4E8E\u5BB9\u5668\u5BF9 Bean \u7684\u7BA1\u7406\u3002</li><li><strong>\u6A21\u677F\u6A21\u5F0F</strong> : Spring \u4E2D JdbcTemplate\u3001RestTemplate \u7B49\u4EE5 Template \u7ED3\u5C3E\u7684\u5BF9\u6570\u636E\u5E93\u3001\u7F51\u7EDC\u7B49\u7B49\u8FDB\u884C\u64CD\u4F5C\u7684\u6A21\u677F\u7C7B\uFF0C\u5C31\u4F7F\u7528\u5230\u4E86\u6A21\u677F\u6A21\u5F0F\u3002</li><li><strong>\u89C2\u5BDF\u8005\u6A21\u5F0F</strong>: Spring \u4E8B\u4EF6\u9A71\u52A8\u6A21\u578B\u5C31\u662F\u89C2\u5BDF\u8005\u6A21\u5F0F\u5F88\u7ECF\u5178\u7684\u4E00\u4E2A\u5E94\u7528\u3002</li><li><strong>\u9002\u914D\u5668\u6A21\u5F0F</strong> :Spring AOP \u7684\u589E\u5F3A\u6216\u901A\u77E5 (Advice) \u4F7F\u7528\u5230\u4E86\u9002\u914D\u5668\u6A21\u5F0F\u3001Spring MVC \u4E2D\u4E5F\u662F\u7528\u5230\u4E86\u9002\u914D\u5668\u6A21\u5F0F\u9002\u914D Controller\u3002</li><li><strong>\u7B56\u7565\u6A21\u5F0F</strong>\uFF1ASpring \u4E2D\u6709\u4E00\u4E2A Resource \u63A5\u53E3\uFF0C\u5B83\u7684\u4E0D\u540C\u5B9E\u73B0\u7C7B\uFF0C\u4F1A\u6839\u636E\u4E0D\u540C\u7684\u7B56\u7565\u53BB\u8BBF\u95EE\u8D44\u6E90\u3002</li></ol><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><h2 id="ioc" tabindex="-1"><a class="header-anchor" href="#ioc" aria-hidden="true">#</a> IOC</h2><h3 id="_5-\u8BF4\u4E00\u8BF4\u4EC0\u4E48\u662F-ioc-\u4EC0\u4E48\u662F-di" tabindex="-1"><a class="header-anchor" href="#_5-\u8BF4\u4E00\u8BF4\u4EC0\u4E48\u662F-ioc-\u4EC0\u4E48\u662F-di" aria-hidden="true">#</a> 5.\u8BF4\u4E00\u8BF4\u4EC0\u4E48\u662F IOC\uFF1F\u4EC0\u4E48\u662F DI?</h3><p>Java \u662F\u9762\u5411\u5BF9\u8C61\u7684\u7F16\u7A0B\u8BED\u8A00\uFF0C\u4E00\u4E2A\u4E2A\u5B9E\u4F8B\u5BF9\u8C61\u76F8\u4E92\u5408\u4F5C\u7EC4\u6210\u4E86\u4E1A\u52A1\u903B\u8F91\uFF0C\u539F\u6765\uFF0C\u6211\u4EEC\u90FD\u662F\u5728\u4EE3\u7801\u91CC\u521B\u5EFA\u5BF9\u8C61\u548C\u5BF9\u8C61\u7684\u4F9D\u8D56\u3002</p><p>\u6240\u8C13\u7684<strong>IOC</strong>\uFF08\u63A7\u5236\u53CD\u8F6C\uFF09\uFF1A\u5C31\u662F\u7531\u5BB9\u5668\u6765\u8D1F\u8D23\u63A7\u5236\u5BF9\u8C61\u7684\u751F\u547D\u5468\u671F\u548C\u5BF9\u8C61\u95F4\u7684\u5173\u7CFB\u3002\u4EE5\u524D\u662F\u6211\u4EEC\u60F3\u8981\u4EC0\u4E48\uFF0C\u5C31\u81EA\u5DF1\u521B\u5EFA\u4EC0\u4E48\uFF0C\u73B0\u5728\u662F\u6211\u4EEC\u9700\u8981\u4EC0\u4E48\uFF0C\u5BB9\u5668\u5C31\u7ED9\u6211\u4EEC\u9001\u6765\u4EC0\u4E48\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-619da277-c15e-4dd7-9f2b-dbd809a9aaa0.png" alt="\u5F15\u5165IOC\u4E4B\u524D\u548C\u5F15\u5165IOC\u4E4B\u540E"></p><p>\u4E5F\u5C31\u662F\u8BF4\uFF0C\u63A7\u5236\u5BF9\u8C61\u751F\u547D\u5468\u671F\u7684\u4E0D\u518D\u662F\u5F15\u7528\u5B83\u7684\u5BF9\u8C61\uFF0C\u800C\u662F\u5BB9\u5668\u3002\u5BF9\u5177\u4F53\u5BF9\u8C61\uFF0C\u4EE5\u524D\u662F\u5B83\u63A7\u5236\u5176\u5B83\u5BF9\u8C61\uFF0C\u73B0\u5728\u6240\u6709\u5BF9\u8C61\u90FD\u88AB\u5BB9\u5668\u63A7\u5236\uFF0C\u6240\u4EE5\u8FD9\u5C31\u53EB<strong>\u63A7\u5236\u53CD\u8F6C</strong>\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-440f5d0e-f4db-462c-97fb-d54407a354d5.png" alt="\u63A7\u5236\u53CD\u8F6C\u793A\u610F\u56FE"></p><p><strong>DI\uFF08\u4F9D\u8D56\u6CE8\u5165\uFF09</strong>\uFF1A\u6307\u7684\u662F\u5BB9\u5668\u5728\u5B9E\u4F8B\u5316\u5BF9\u8C61\u7684\u65F6\u5019\u628A\u5B83\u4F9D\u8D56\u7684\u7C7B\u6CE8\u5165\u7ED9\u5B83\u3002\u6709\u7684\u8BF4\u6CD5 IOC \u548C DI \u662F\u4E00\u56DE\u4E8B\uFF0C\u6709\u7684\u8BF4\u6CD5\u662F IOC \u662F\u601D\u60F3\uFF0CDI \u662F IOC \u7684\u5B9E\u73B0\u3002</p><blockquote><p><strong>\u4E3A\u4EC0\u4E48\u8981\u4F7F\u7528 IOC \u5462\uFF1F</strong></p></blockquote><p>\u6700\u4E3B\u8981\u7684\u662F\u4E24\u4E2A\u5B57<strong>\u89E3\u8026</strong>\uFF0C\u786C\u7F16\u7801\u4F1A\u9020\u6210\u5BF9\u8C61\u95F4\u7684\u8FC7\u5EA6\u8026\u5408\uFF0C\u4F7F\u7528 IOC \u4E4B\u540E\uFF0C\u6211\u4EEC\u53EF\u4EE5\u4E0D\u7528\u5173\u5FC3\u5BF9\u8C61\u95F4\u7684\u4F9D\u8D56\uFF0C\u4E13\u5FC3\u5F00\u53D1\u5E94\u7528\u5C31\u884C\u3002</p><h3 id="_6-\u80FD\u7B80\u5355\u8BF4\u4E00\u4E0B-spring-ioc-\u7684\u5B9E\u73B0\u673A\u5236\u5417" tabindex="-1"><a class="header-anchor" href="#_6-\u80FD\u7B80\u5355\u8BF4\u4E00\u4E0B-spring-ioc-\u7684\u5B9E\u73B0\u673A\u5236\u5417" aria-hidden="true">#</a> 6.\u80FD\u7B80\u5355\u8BF4\u4E00\u4E0B Spring IOC \u7684\u5B9E\u73B0\u673A\u5236\u5417\uFF1F</h3><p>PS:\u8FD9\u9053\u9898\u8001\u4E09\u5728\u9762\u8BD5\u4E2D\u88AB\u95EE\u5230\u8FC7\uFF0C\u95EE\u6CD5\u662F\u201C<strong>\u4F60\u6709\u81EA\u5DF1\u5B9E\u73B0\u8FC7\u7B80\u5355\u7684 Spring \u5417\uFF1F</strong>\u201D</p><p>Spring \u7684 IOC \u672C\u8D28\u5C31\u662F\u4E00\u4E2A\u5927\u5DE5\u5382\uFF0C\u6211\u4EEC\u60F3\u60F3\u4E00\u4E2A\u5DE5\u5382\u662F\u600E\u4E48\u8FD0\u884C\u7684\u5462\uFF1F</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-7678c40f-a48d-4bd5-80f8-e902ad688e11.png" alt="\u5DE5\u5382\u8FD0\u884C"></p><ul><li><p><strong>\u751F\u4EA7\u4EA7\u54C1</strong>\uFF1A\u4E00\u4E2A\u5DE5\u5382\u6700\u6838\u5FC3\u7684\u529F\u80FD\u5C31\u662F\u751F\u4EA7\u4EA7\u54C1\u3002\u5728 Spring \u91CC\uFF0C\u4E0D\u7528 Bean \u81EA\u5DF1\u6765\u5B9E\u4F8B\u5316\uFF0C\u800C\u662F\u4EA4\u7ED9 Spring\uFF0C\u5E94\u8BE5\u600E\u4E48\u5B9E\u73B0\u5462\uFF1F\u2014\u2014\u7B54\u6848\u6BEB\u65E0\u7591\u95EE\uFF0C<strong>\u53CD\u5C04</strong>\u3002</p><p>\u90A3\u4E48\u8FD9\u4E2A\u5382\u5B50\u7684\u751F\u4EA7\u7BA1\u7406\u662F\u600E\u4E48\u505A\u7684\uFF1F\u4F60\u5E94\u8BE5\u4E5F\u77E5\u9053\u2014\u2014<strong>\u5DE5\u5382\u6A21\u5F0F</strong>\u3002</p></li><li><p><strong>\u5E93\u5B58\u4EA7\u54C1</strong>\uFF1A\u5DE5\u5382\u4E00\u822C\u90FD\u662F\u6709\u5E93\u623F\u7684\uFF0C\u7528\u6765\u5E93\u5B58\u4EA7\u54C1\uFF0C\u6BD5\u7ADF\u751F\u4EA7\u7684\u4EA7\u54C1\u4E0D\u80FD\u7ACB\u9A6C\u5C31\u62C9\u8D70\u3002Spring \u6211\u4EEC\u90FD\u77E5\u9053\u662F\u4E00\u4E2A\u5BB9\u5668\uFF0C\u8FD9\u4E2A\u5BB9\u5668\u91CC\u5B58\u7684\u5C31\u662F\u5BF9\u8C61\uFF0C\u4E0D\u80FD\u6BCF\u6B21\u6765\u53D6\u5BF9\u8C61\uFF0C\u90FD\u5F97\u73B0\u573A\u6765\u53CD\u5C04\u521B\u5EFA\u5BF9\u8C61\uFF0C\u5F97\u628A\u521B\u5EFA\u51FA\u7684\u5BF9\u8C61\u5B58\u8D77\u6765\u3002</p></li><li><p><strong>\u8BA2\u5355\u5904\u7406</strong>\uFF1A\u8FD8\u6709\u6700\u91CD\u8981\u7684\u4E00\u70B9\uFF0C\u5DE5\u5382\u6839\u636E\u4EC0\u4E48\u6765\u63D0\u4F9B\u4EA7\u54C1\u5462\uFF1F\u8BA2\u5355\u3002\u8FD9\u4E9B\u8BA2\u5355\u53EF\u80FD\u4E94\u82B1\u516B\u95E8\uFF0C\u6709\u7EBF\u4E0A\u7B7E\u7B7E\u7684\u3001\u6709\u5230\u5DE5\u5382\u7B7E\u7684\u3001\u8FD8\u6709\u5DE5\u5382\u9500\u552E\u4E0A\u95E8\u7B7E\u7684\u2026\u2026\u6700\u540E\u7ECF\u8FC7\u5904\u7406\uFF0C\u6307\u5BFC\u5DE5\u5382\u7684\u51FA\u8D27\u3002</p><p>\u5728 Spring \u91CC\uFF0C\u4E5F\u6709\u8FD9\u6837\u7684\u8BA2\u5355\uFF0C\u5B83\u5C31\u662F\u6211\u4EEC bean \u7684\u5B9A\u4E49\u548C\u4F9D\u8D56\u5173\u7CFB\uFF0C\u53EF\u4EE5\u662F xml \u5F62\u5F0F\uFF0C\u4E5F\u53EF\u4EE5\u662F\u6211\u4EEC\u6700\u719F\u6089\u7684\u6CE8\u89E3\u5F62\u5F0F\u3002</p></li></ul><p>\u6211\u4EEC\u7B80\u5355\u5730\u5B9E\u73B0\u4E00\u4E2A mini \u7248\u7684 Spring IOC\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-1d55c63d-2d12-43b1-9f43-428f5f4a1413.png" alt="mini\u7248\u672CSpring IOC"></p><p><strong>Bean \u5B9A\u4E49\uFF1A</strong></p><p>Bean \u901A\u8FC7\u4E00\u4E2A\u914D\u7F6E\u6587\u4EF6\u5B9A\u4E49\uFF0C\u628A\u5B83\u89E3\u6790\u6210\u4E00\u4E2A\u7C7B\u578B\u3002</p><ul><li><p>beans.properties</p><p>\u5077\u61D2\uFF0C\u8FD9\u91CC\u76F4\u63A5\u7528\u4E86\u6700\u65B9\u4FBF\u89E3\u6790\u7684 properties\uFF0C\u8FD9\u91CC\u76F4\u63A5\u7528\u4E00\u4E2A<code>&lt;key,value&gt;</code>\u7C7B\u578B\u7684\u914D\u7F6E\u6765\u4EE3\u8868 Bean \u7684\u5B9A\u4E49\uFF0C\u5176\u4E2D key \u662F beanName\uFF0Cvalue \u662F class</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code>userDao<span class="token operator">:</span><span class="token class-name"><span class="token namespace">cn<span class="token punctuation">.</span>fighter3<span class="token punctuation">.</span>bean<span class="token punctuation">.</span></span>UserDao</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div></li><li><p>BeanDefinition.java</p><p>bean \u5B9A\u4E49\u7C7B\uFF0C\u914D\u7F6E\u6587\u4EF6\u4E2D bean \u5B9A\u4E49\u5BF9\u5E94\u7684\u5B9E\u4F53</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">BeanDefinition</span> <span class="token punctuation">{</span>
 
     <span class="token keyword">private</span> <span class="token class-name">String</span> beanName<span class="token punctuation">;</span>
diff --git a/dist/assets/springtask.html.406633ab.js b/dist/assets/springtask.html.04deb6a0.js
similarity index 85%
rename from dist/assets/springtask.html.406633ab.js
rename to dist/assets/springtask.html.04deb6a0.js
index 6d32c2c8..8bf7de46 100644
--- a/dist/assets/springtask.html.406633ab.js
+++ b/dist/assets/springtask.html.04deb6a0.js
@@ -1 +1 @@
-const e={key:"v-a4a685a0",path:"/springboot/springtask.html",title:"Spring Boot \u6574\u5408 Spring Task \u5B9E\u73B0\u5B9A\u65F6\u4EFB\u52A1",lang:"zh-CN",frontmatter:{category:["Java\u4F01\u4E1A\u7EA7\u5F00\u53D1"],tag:["Spring Boot"],title:"Spring Boot \u6574\u5408 Spring Task \u5B9E\u73B0\u5B9A\u65F6\u4EFB\u52A1",summary:"\u5B9A\u65F6\u4EFB\u52A1\u7684\u5E94\u7528\u573A\u666F\u5176\u5B9E\u86EE\u5E38\u89C1\u7684\uFF1A \u6570\u636E\u5907\u4EFD; \u8BA2\u5355\u672A\u652F\u4ED8\u5219\u81EA\u52A8\u53D6\u6D88; \u5B9A\u65F6\u722C\u53D6\u6570\u636E; \u5B9A\u65F6\u63A8\u9001\u4FE1\u606F; \u5B9A\u65F6\u53D1\u5E03\u6587\u7AE0; \u5B9A\u65F6\u751F\u6210\u62A5\u8868; \u7B49\u7B49\uFF08\u60F3\u4E0D\u5230\u5176\u4ED6\u573A\u666F\u4E86\uFF0C\u5C31\u53EA\u80FD\u7B49\u7B49\u6765\u51D1\uFF0C\u7B49\u7B49\u4E5F\u7B97\u662F\u4E00\u79CD\u5B9A\u65F6\u7684\u573A\u666F\u5427\uFF01\uFF09; Timer JDK 1.3 \u5C31\u5F00\u59CB\u652F\u6301\u7684\u4E00\u79CD\u5B9A\u65F6\u4EFB\u52A1\u7684\u5B9E\u73B0\u65B9\u5F0F\u3002\u5185\u90E8\u901A\u8FC7 TaskQueue \u7684\u7C7B\u6765\u5B58\u653E\u5B9A\u65F6\u4EFB\u52A1\uFF0C\u7528\u8D77\u6765\u6BD4\u8F83\u7B80\u5355\uFF0C\u4F46\u7F3A\u9677\u6BD4\u8F83\u591A\uFF0C\u6BD4\u5982\u8BF4\u4E00",head:[["meta",{property:"og:url",content:"https://tobebetterjavaer.com/springboot/springtask.html"}],["meta",{property:"og:site_name",content:"Java \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF"}],["meta",{property:"og:title",content:"Spring Boot \u6574\u5408 Spring Task \u5B9E\u73B0\u5B9A\u65F6\u4EFB\u52A1"}],["meta",{property:"og:type",content:"article"}],["meta",{property:"og:updated_time",content:"2022-05-25T01:33:28.000Z"}],["meta",{property:"og:locale",content:"zh-CN"}],["meta",{property:"article:tag",content:"Spring Boot"}],["meta",{property:"article:modified_time",content:"2022-05-25T01:33:28.000Z"}]]},excerpt:"",headers:[{level:3,title:"Timer",slug:"timer",children:[]},{level:3,title:"ScheduledThreadPoolExecutor",slug:"scheduledthreadpoolexecutor",children:[]},{level:3,title:"\u5173\u4E8E Spring Task",slug:"\u5173\u4E8E-spring-task",children:[]},{level:3,title:"\u5173\u4E8E Cron \u8868\u8FBE\u5F0F",slug:"\u5173\u4E8E-cron-\u8868\u8FBE\u5F0F",children:[]},{level:3,title:"\u5C0F\u7ED3",slug:"\u5C0F\u7ED3",children:[]},{level:3,title:"\u6E90\u7801\u8DEF\u5F84",slug:"\u6E90\u7801\u8DEF\u5F84",children:[]}],git:{createdTime:1653035404e3,updatedTime:1653442408e3,contributors:[{name:"\u6C89\u9ED8\u738B\u4E8C",email:"www.qing_gee@163.com",commits:2},{name:"itwanger",email:"www.qing_gee@163.com",commits:1}]},readingTime:{minutes:7.72,words:2317},filePathRelative:"springboot/springtask.md"};export{e as data};
+const e={key:"v-a4a685a0",path:"/springboot/springtask.html",title:"Spring Boot \u6574\u5408 Spring Task \u5B9E\u73B0\u5B9A\u65F6\u4EFB\u52A1",lang:"zh-CN",frontmatter:{category:["Java\u4F01\u4E1A\u7EA7\u5F00\u53D1"],tag:["Spring Boot"],title:"Spring Boot \u6574\u5408 Spring Task \u5B9E\u73B0\u5B9A\u65F6\u4EFB\u52A1",summary:"\u5B9A\u65F6\u4EFB\u52A1\u7684\u5E94\u7528\u573A\u666F\u5176\u5B9E\u86EE\u5E38\u89C1\u7684\uFF1A \u6570\u636E\u5907\u4EFD; \u8BA2\u5355\u672A\u652F\u4ED8\u5219\u81EA\u52A8\u53D6\u6D88; \u5B9A\u65F6\u722C\u53D6\u6570\u636E; \u5B9A\u65F6\u63A8\u9001\u4FE1\u606F; \u5B9A\u65F6\u53D1\u5E03\u6587\u7AE0; \u5B9A\u65F6\u751F\u6210\u62A5\u8868; \u7B49\u7B49\uFF08\u60F3\u4E0D\u5230\u5176\u4ED6\u573A\u666F\u4E86\uFF0C\u5C31\u53EA\u80FD\u7B49\u7B49\u6765\u51D1\uFF0C\u7B49\u7B49\u4E5F\u7B97\u662F\u4E00\u79CD\u5B9A\u65F6\u7684\u573A\u666F\u5427\uFF01\uFF09; Timer JDK 1.3 \u5C31\u5F00\u59CB\u652F\u6301\u7684\u4E00\u79CD\u5B9A\u65F6\u4EFB\u52A1\u7684\u5B9E\u73B0\u65B9\u5F0F\u3002\u5185\u90E8\u901A\u8FC7 TaskQueue \u7684\u7C7B\u6765\u5B58\u653E\u5B9A\u65F6\u4EFB\u52A1\uFF0C\u7528\u8D77\u6765\u6BD4\u8F83\u7B80\u5355\uFF0C\u4F46\u7F3A\u9677\u6BD4\u8F83\u591A\uFF0C\u6BD4\u5982\u8BF4\u4E00",head:[["meta",{property:"og:url",content:"https://tobebetterjavaer.com/springboot/springtask.html"}],["meta",{property:"og:site_name",content:"Java \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF"}],["meta",{property:"og:title",content:"Spring Boot \u6574\u5408 Spring Task \u5B9E\u73B0\u5B9A\u65F6\u4EFB\u52A1"}],["meta",{property:"og:type",content:"article"}],["meta",{property:"og:updated_time",content:"2022-06-10T11:28:25.000Z"}],["meta",{property:"og:locale",content:"zh-CN"}],["meta",{property:"article:tag",content:"Spring Boot"}],["meta",{property:"article:modified_time",content:"2022-06-10T11:28:25.000Z"}]]},excerpt:"",headers:[{level:3,title:"Timer",slug:"timer",children:[]},{level:3,title:"ScheduledThreadPoolExecutor",slug:"scheduledthreadpoolexecutor",children:[]},{level:3,title:"\u5173\u4E8E Spring Task",slug:"\u5173\u4E8E-spring-task",children:[]},{level:3,title:"\u5173\u4E8E Cron \u8868\u8FBE\u5F0F",slug:"\u5173\u4E8E-cron-\u8868\u8FBE\u5F0F",children:[]},{level:3,title:"\u5C0F\u7ED3",slug:"\u5C0F\u7ED3",children:[]},{level:3,title:"\u6E90\u7801\u8DEF\u5F84",slug:"\u6E90\u7801\u8DEF\u5F84",children:[]}],git:{createdTime:1653035404e3,updatedTime:1654860505e3,contributors:[{name:"itwanger",email:"www.qing_gee@163.com",commits:2},{name:"\u6C89\u9ED8\u738B\u4E8C",email:"www.qing_gee@163.com",commits:2}]},readingTime:{minutes:7.74,words:2323},filePathRelative:"springboot/springtask.md"};export{e as data};
diff --git a/dist/assets/springtask.html.0afe6499.js b/dist/assets/springtask.html.6f8efcf6.js
similarity index 91%
rename from dist/assets/springtask.html.0afe6499.js
rename to dist/assets/springtask.html.6f8efcf6.js
index eeb6debb..d501283d 100644
--- a/dist/assets/springtask.html.0afe6499.js
+++ b/dist/assets/springtask.html.6f8efcf6.js
@@ -1,4 +1,4 @@
-import{_ as o}from"./plugin-vue_export-helper.21dcd24c.js";import{r as e,o as c,c as i,a as n,b as a,w as l,e as u,d as s}from"./app.a0271b9c.js";const d={},r=u(`<p>\u5B9A\u65F6\u4EFB\u52A1\u7684\u5E94\u7528\u573A\u666F\u5176\u5B9E\u86EE\u5E38\u89C1\u7684\uFF1A</p><ul><li>\u6570\u636E\u5907\u4EFD</li><li>\u8BA2\u5355\u672A\u652F\u4ED8\u5219\u81EA\u52A8\u53D6\u6D88</li><li>\u5B9A\u65F6\u722C\u53D6\u6570\u636E</li><li>\u5B9A\u65F6\u63A8\u9001\u4FE1\u606F</li><li>\u5B9A\u65F6\u53D1\u5E03\u6587\u7AE0</li><li>\u5B9A\u65F6\u751F\u6210\u62A5\u8868</li><li>\u7B49\u7B49\uFF08\u60F3\u4E0D\u5230\u5176\u4ED6\u573A\u666F\u4E86\uFF0C\u5C31\u53EA\u80FD\u7B49\u7B49\u6765\u51D1\uFF0C\u7B49\u7B49\u4E5F\u7B97\u662F\u4E00\u79CD\u5B9A\u65F6\u7684\u573A\u666F\u5427\uFF01\uFF09</li></ul><h3 id="timer" tabindex="-1"><a class="header-anchor" href="#timer" aria-hidden="true">#</a> Timer</h3><p>JDK 1.3 \u5C31\u5F00\u59CB\u652F\u6301\u7684\u4E00\u79CD\u5B9A\u65F6\u4EFB\u52A1\u7684\u5B9E\u73B0\u65B9\u5F0F\u3002\u5185\u90E8\u901A\u8FC7 TaskQueue \u7684\u7C7B\u6765\u5B58\u653E\u5B9A\u65F6\u4EFB\u52A1\uFF0C\u7528\u8D77\u6765\u6BD4\u8F83\u7B80\u5355\uFF0C\u4F46\u7F3A\u9677\u6BD4\u8F83\u591A\uFF0C\u6BD4\u5982\u8BF4\u4E00\u4E2A Timer \u5C31\u4F1A\u8D77\u4E00\u4E2A\u7EBF\u7A0B\uFF0C\u4EFB\u52A1\u591A\u4E86\u6027\u80FD\u5C31\u975E\u5E38\u5DEE\uFF0C\u518D\u6BD4\u5982\u8BF4\u5982\u679C\u6267\u884C\u4EFB\u52A1\u671F\u95F4\u67D0\u4E2A TimerTask \u8017\u65F6\u6BD4\u8F83\u4E45\uFF0C\u5C31\u4F1A\u5F71\u54CD\u5176\u4ED6\u4EFB\u52A1\u7684\u8C03\u5EA6\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token annotation punctuation">@Slf4j</span>
+import{_ as e}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o,c,a as n,b as t,e as i,d as s}from"./app.615e41d8.js";const l={},u=i(`<p>\u5B9A\u65F6\u4EFB\u52A1\u7684\u5E94\u7528\u573A\u666F\u5176\u5B9E\u86EE\u5E38\u89C1\u7684\uFF1A</p><ul><li>\u6570\u636E\u5907\u4EFD</li><li>\u8BA2\u5355\u672A\u652F\u4ED8\u5219\u81EA\u52A8\u53D6\u6D88</li><li>\u5B9A\u65F6\u722C\u53D6\u6570\u636E</li><li>\u5B9A\u65F6\u63A8\u9001\u4FE1\u606F</li><li>\u5B9A\u65F6\u53D1\u5E03\u6587\u7AE0</li><li>\u5B9A\u65F6\u751F\u6210\u62A5\u8868</li><li>\u7B49\u7B49\uFF08\u60F3\u4E0D\u5230\u5176\u4ED6\u573A\u666F\u4E86\uFF0C\u5C31\u53EA\u80FD\u7B49\u7B49\u6765\u51D1\uFF0C\u7B49\u7B49\u4E5F\u7B97\u662F\u4E00\u79CD\u5B9A\u65F6\u7684\u573A\u666F\u5427\uFF01\uFF09</li></ul><h3 id="timer" tabindex="-1"><a class="header-anchor" href="#timer" aria-hidden="true">#</a> Timer</h3><p>JDK 1.3 \u5C31\u5F00\u59CB\u652F\u6301\u7684\u4E00\u79CD\u5B9A\u65F6\u4EFB\u52A1\u7684\u5B9E\u73B0\u65B9\u5F0F\u3002\u5185\u90E8\u901A\u8FC7 TaskQueue \u7684\u7C7B\u6765\u5B58\u653E\u5B9A\u65F6\u4EFB\u52A1\uFF0C\u7528\u8D77\u6765\u6BD4\u8F83\u7B80\u5355\uFF0C\u4F46\u7F3A\u9677\u6BD4\u8F83\u591A\uFF0C\u6BD4\u5982\u8BF4\u4E00\u4E2A Timer \u5C31\u4F1A\u8D77\u4E00\u4E2A\u7EBF\u7A0B\uFF0C\u4EFB\u52A1\u591A\u4E86\u6027\u80FD\u5C31\u975E\u5E38\u5DEE\uFF0C\u518D\u6BD4\u5982\u8BF4\u5982\u679C\u6267\u884C\u4EFB\u52A1\u671F\u95F4\u67D0\u4E2A TimerTask \u8017\u65F6\u6BD4\u8F83\u4E45\uFF0C\u5C31\u4F1A\u5F71\u54CD\u5176\u4ED6\u4EFB\u52A1\u7684\u8C03\u5EA6\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token annotation punctuation">@Slf4j</span>
 <span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">TimerDemo</span> <span class="token punctuation">{</span>
     <span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">void</span> <span class="token function">main</span><span class="token punctuation">(</span><span class="token class-name">String</span><span class="token punctuation">[</span><span class="token punctuation">]</span> args<span class="token punctuation">)</span> <span class="token punctuation">{</span>
         <span class="token class-name">TimerTask</span> task <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">TimerTask</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
@@ -113,4 +113,4 @@ import{_ as o}from"./plugin-vue_export-helper.21dcd24c.js";import{r as e,o as c,
 2022-04-27 15:33:07.390  INFO 4421 --- [led-task-pool-1] c.codingmore.component.PublishPostTask   : Fixed Rate Task : The time is now 2022-04-27 15:33:07
 2022-04-27 15:33:09.391  INFO 4421 --- [led-task-pool-1] c.codingmore.component.PublishPostTask   : Fixed Rate Task : The time is now 2022-04-27 15:33:09
 2022-04-27 15:33:13.295  INFO 4421 --- [led-task-pool-1] c.codingmore.component.PublishPostTask   : Fixed Rate Task : The time is now 2022-04-27 15:33:13
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="\u5173\u4E8E-cron-\u8868\u8FBE\u5F0F" tabindex="-1"><a class="header-anchor" href="#\u5173\u4E8E-cron-\u8868\u8FBE\u5F0F" aria-hidden="true">#</a> \u5173\u4E8E Cron \u8868\u8FBE\u5F0F</h3><p>\u8FD9\u91CC\u987A\u5E26\u666E\u53CA\u4E00\u4E0B Cron \u8868\u8FBE\u5F0F\uFF0C\u5728\u5B9A\u65F6\u4EFB\u52A1\u4E2D\u4F1A\u7ECF\u5E38\u4F1A\u9047\u5230\u3002Cron \u8FD9\u4E2A\u8BCD\u6765\u6E90\u4E8E\u5E0C\u814A\u8BED chronos\uFF0C\u539F\u610F\u4E5F\u5C31\u662F\u65F6\u95F4\u3002</p><p>Cron \u8868\u8FBE\u5F0F\u662F\u4E00\u4E2A\u542B\u6709\u65F6\u95F4\u610F\u4E49\u7684\u5B57\u7B26\u4E32\uFF0C\u4EE5 5 \u4E2A\u7A7A\u683C\u9694\u5F00\uFF0C\u5206\u6210 6 \u4E2A\u65F6\u95F4\u5143\u7D20\u3002\u4E3E\u51E0\u4E2A\u4F8B\u5B50\u5C31\u4E00\u76EE\u4E86\u7136\u4E86\u3002</p><table><thead><tr><th>\u793A\u4F8B</th><th>\u8BF4\u660E</th></tr></thead><tbody><tr><td><code>0 15 10 ? * *</code></td><td>\u6BCF\u5929\u4E0A\u534810:15\u6267\u884C\u4EFB\u52A1</td></tr><tr><td><code>0 0 10,14,16 * * ?</code></td><td>\u6BCF\u592910 \u70B9\u300114 \u70B9\u300116 \u70B9\u6267\u884C\u4EFB\u52A1</td></tr><tr><td><code>0 0 12 ? * 3</code></td><td>\u6BCF\u4E2A\u661F\u671F\u4E09\u4E2D\u5348 12 \u70B9\u6267\u884C\u4EFB\u52A1</td></tr><tr><td><code>0 15 10 15 * ?</code></td><td>\u6BCF\u6708 15 \u65E5\u4E0A\u5348 10 \u70B9 15 \u6267\u884C\u4EFB\u52A1</td></tr></tbody></table><p>Cron \u7684\u8BED\u6CD5\u683C\u5F0F\u53EF\u4EE5\u603B\u7ED3\u4E3A\uFF1A</p><blockquote><p>Seconds Minutes Hours DayofMonth Month DayofWeek</p></blockquote><p>\u6BCF\u4E2A\u65F6\u95F4\u5143\u7D20\u7684\u53D6\u503C\u8303\u56F4\uFF0C\u4EE5\u53CA\u53EF\u51FA\u73B0\u7684\u7279\u6B8A\u5B57\u7B26\u5982\u4E0B\u6240\u793A\u3002</p><table><thead><tr><th>\u65F6\u95F4\u5143\u7D20</th><th>\u53D6\u503C\u8303\u56F4</th><th>\u53EF\u51FA\u73B0\u7684\u7279\u6B8A\u5B57\u7B26</th></tr></thead><tbody><tr><td>\u79D2</td><td><code>[0,59]</code></td><td><code>*,-/</code></td></tr><tr><td>\u5206\u949F</td><td><code>[0,59]</code></td><td><code>*,-/</code></td></tr><tr><td>\u5C0F\u65F6</td><td><code>[0,59]</code></td><td><code>*,-/</code></td></tr><tr><td>\u65E5\u671F</td><td><code>[0,31]</code></td><td><code>*,-/?LW</code></td></tr><tr><td>\u6708\u4EFD</td><td><code>[1,12]</code></td><td><code>*,-/</code></td></tr><tr><td>\u661F\u671F</td><td><code>[1,7]</code></td><td><code>*,-/?L#</code></td></tr></tbody></table><p>\u7279\u6B8A\u5B57\u7B26\u7684\u542B\u4E49\u548C\u793A\u4F8B\u5982\u4E0B\u6240\u793A\u3002</p><table><thead><tr><th>\u7279\u6B8A\u5B57\u7B26</th><th>\u542B\u4E49</th><th>\u793A\u4F8B</th></tr></thead><tbody><tr><td><code>*</code></td><td>\u6240\u6709\u53EF\u80FD\u7684\u503C</td><td>\u5F88\u597D\u7406\u89E3\uFF0C\u6708\u57DF\u4E2D\u4E3A\u6BCF\u4E2A\u6708\uFF0C\u661F\u671F\u57DF\u4E2D\u6BCF\u4E2A\u661F\u671F\u51E0</td></tr><tr><td><code>,</code></td><td>\u679A\u4E3E\u7684\u503C</td><td>\u5F88\u597D\u7406\u89E3\uFF0C\u5C0F\u65F6\u57DF\u4E2D <code>10,14,16</code>\uFF0C\u5C31\u8868\u793A\u8FD9\u51E0\u4E2A\u5C0F\u65F6\u53EF\u9009</td></tr><tr><td><code>-</code></td><td>\u8303\u56F4</td><td>\u5F88\u597D\u7406\u89E3\uFF0C\u5206\u949F\u57DF\u4E2D <code>10-19</code>\uFF0C\u5C31\u8868\u793A 10-19 \u5206\u949F\u6BCF\u9694\u4E00\u5206\u949F\u6267\u884C\u4E00\u6B21</td></tr><tr><td><code>/</code></td><td>\u6307\u5B9A\u6570\u503C\u7684\u589E\u91CF</td><td>\u5F88\u597D\u7406\u89E3\uFF0C\u5206\u949F\u57DF\u4E2D <code>0/15</code>\uFF0C\u5C31\u8868\u793A\u6BCF\u9694 15 \u5206\u949F\u6267\u884C\u4E00\u6B21</td></tr><tr><td><code>?</code></td><td>\u4E0D\u6307\u5B9A\u503C</td><td>\u5F88\u597D\u7406\u89E3\uFF0C\u65E5\u671F\u57DF\u6307\u5B9A\u4E86\u661F\u671F\u57DF\u5C31\u4E0D\u80FD\u6307\u5B9A\u503C\uFF0C\u53CD\u4E4B\u4EA6\u7136\uFF0C\u56E0\u4E3A\u65E5\u671F\u57DF\u548C\u661F\u671F\u57DF\u5C5E\u4E8E\u51B2\u7A81\u5173\u7CFB</td></tr><tr><td><code>L</code></td><td>\u5355\u8BCD Last \u7684\u9996\u5B57\u6BCD</td><td>\u5F88\u597D\u7406\u89E3\uFF0C\u65E5\u671F\u57DF\u548C\u661F\u671F\u57DF\u652F\u6301\uFF0C\u8868\u793A\u6708\u7684\u6700\u540E\u4E00\u5929\u6216\u8005\u661F\u671F\u7684\u6700\u540E\u4E00\u5929</td></tr><tr><td><code>W</code></td><td>\u9664\u5468\u672B\u4EE5\u5916\u7684\u5DE5\u4F5C\u65E5</td><td>\u5F88\u597D\u7406\u89E3\uFF0C\u4EC5\u65E5\u671F\u57DF\u652F\u6301</td></tr><tr><td><code>#</code></td><td>\u6BCF\u4E2A\u6708\u7684\u7B2C\u51E0\u4E2A\u661F\u671F\u51E0</td><td>\u5F88\u597D\u7406\u89E3\uFF0C\u4EC5\u661F\u671F\u57DF\u652F\u6301\uFF0C<code>4#2</code>\u8868\u793A\u67D0\u6708\u7684\u7B2C\u4E8C\u4E2A\u661F\u671F\u56DB</td></tr></tbody></table><h3 id="\u5C0F\u7ED3" tabindex="-1"><a class="header-anchor" href="#\u5C0F\u7ED3" aria-hidden="true">#</a> \u5C0F\u7ED3</h3><p>Spring Task \u867D\u7136\u7528\u8D77\u6765\u5F88\u65B9\u4FBF\uFF0C\u4F46\u7528\u6CD5\u8FC7\u53BB\u7B80\u5355\uFF0C\u5F88\u591A\u590D\u6742\u7684\u4E1A\u52A1\u903B\u8F91\u662F\u6CA1\u6709\u529E\u6CD5\u5B9E\u73B0\u7684\uFF0C\u6BD4\u5982\u8BF4\u7F16\u7A0B\u55B5\u7684\u5B9A\u65F6\u53D1\u5E03\u6587\u7AE0\u529F\u80FD\uFF0C\u53EA\u7528 Spring Task \u662F\u6CA1\u529E\u6CD5\u7684\u3002</p><hr>`,49),k=s("\u66F4\u591A\u5185\u5BB9\uFF0C\u53EA\u9488\u5BF9\u300AJava \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF\u300B\u661F\u7403\u7528\u6237\u5F00\u653E\uFF0C\u9700\u8981\u7684\u5C0F\u4F19\u4F34\u53EF\u4EE5"),m=s("\u6233\u94FE\u63A5\u{1F517}"),v=s("\u52A0\u5165\u6211\u4EEC\u7684\u661F\u7403\uFF0C\u4E00\u8D77\u5B66\u4E60\uFF0C\u4E00\u8D77\u5377\u3002\u3002"),b=n("strong",null,"\u7F16\u7A0B\u55B5",-1),h=s("\u{1F431}\u662F\u4E00\u4E2A Spring Boot+Vue \u7684\u524D\u540E\u7AEF\u5206\u79BB\u9879\u76EE\uFF0C\u878D\u5408\u4E86\u5E02\u9762\u4E0A\u7EDD\u5927\u591A\u6570\u6D41\u884C\u7684\u6280\u672F\u8981\u70B9\u3002\u901A\u8FC7\u5B66\u4E60\u5B9E\u6218\u9879\u76EE\uFF0C\u4F60\u53EF\u4EE5\u5C06\u6240\u5B66\u7684\u77E5\u8BC6\u901A\u8FC7\u5B9E\u8DF5\u8FDB\u884C\u68C0\u9A8C\u3001\u4F60\u53EF\u4EE5\u62D3\u5BBD\u81EA\u5DF1\u7684\u6280\u672F\u8FB9\u754C\uFF0C\u4F60\u53EF\u4EE5\u638C\u63E1\u4E00\u4E2A\u771F\u6B63\u7684\u5B9E\u6218\u9879\u76EE\u662F\u5982\u4F55\u4ECE 0 \u5230 1 \u7684\u3002"),g=n("hr",null,null,-1),T=n("h3",{id:"\u6E90\u7801\u8DEF\u5F84",tabindex:"-1"},[n("a",{class:"header-anchor",href:"#\u6E90\u7801\u8DEF\u5F84","aria-hidden":"true"},"#"),s(" \u6E90\u7801\u8DEF\u5F84")],-1),f=s("\u7F16\u7A0B\u55B5\uFF1A"),x={href:"https://github.com/itwanger/coding-more",target:"_blank",rel:"noopener noreferrer"},w=s("https://github.com/itwanger/coding-more"),S=s("codingmore-springtask\uFF1A"),y={href:"https://github.com/itwanger/codingmore-learning/tree/main/codingmore-springtask",target:"_blank",rel:"noopener noreferrer"},_=s("https://github.com/itwanger/codingmore-learning");function D(P,E){const p=e("RouterLink"),t=e("ExternalLinkIcon");return c(),i("div",null,[r,n("p",null,[k,a(p,{to:"/springboot/docs/zhishixingqiu/"},{default:l(()=>[m]),_:1}),v,b,h]),g,T,n("blockquote",null,[n("ul",null,[n("li",null,[f,n("a",x,[w,a(t)])]),n("li",null,[S,n("a",y,[_,a(t)])])])])])}var C=o(d,[["render",D],["__file","springtask.html.vue"]]);export{C as default};
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="\u5173\u4E8E-cron-\u8868\u8FBE\u5F0F" tabindex="-1"><a class="header-anchor" href="#\u5173\u4E8E-cron-\u8868\u8FBE\u5F0F" aria-hidden="true">#</a> \u5173\u4E8E Cron \u8868\u8FBE\u5F0F</h3><p>\u8FD9\u91CC\u987A\u5E26\u666E\u53CA\u4E00\u4E0B Cron \u8868\u8FBE\u5F0F\uFF0C\u5728\u5B9A\u65F6\u4EFB\u52A1\u4E2D\u4F1A\u7ECF\u5E38\u4F1A\u9047\u5230\u3002Cron \u8FD9\u4E2A\u8BCD\u6765\u6E90\u4E8E\u5E0C\u814A\u8BED chronos\uFF0C\u539F\u610F\u4E5F\u5C31\u662F\u65F6\u95F4\u3002</p><p>Cron \u8868\u8FBE\u5F0F\u662F\u4E00\u4E2A\u542B\u6709\u65F6\u95F4\u610F\u4E49\u7684\u5B57\u7B26\u4E32\uFF0C\u4EE5 5 \u4E2A\u7A7A\u683C\u9694\u5F00\uFF0C\u5206\u6210 6 \u4E2A\u65F6\u95F4\u5143\u7D20\u3002\u4E3E\u51E0\u4E2A\u4F8B\u5B50\u5C31\u4E00\u76EE\u4E86\u7136\u4E86\u3002</p><table><thead><tr><th>\u793A\u4F8B</th><th>\u8BF4\u660E</th></tr></thead><tbody><tr><td><code>0 15 10 ? * *</code></td><td>\u6BCF\u5929\u4E0A\u534810:15\u6267\u884C\u4EFB\u52A1</td></tr><tr><td><code>0 0 10,14,16 * * ?</code></td><td>\u6BCF\u592910 \u70B9\u300114 \u70B9\u300116 \u70B9\u6267\u884C\u4EFB\u52A1</td></tr><tr><td><code>0 0 12 ? * 3</code></td><td>\u6BCF\u4E2A\u661F\u671F\u4E09\u4E2D\u5348 12 \u70B9\u6267\u884C\u4EFB\u52A1</td></tr><tr><td><code>0 15 10 15 * ?</code></td><td>\u6BCF\u6708 15 \u65E5\u4E0A\u5348 10 \u70B9 15 \u6267\u884C\u4EFB\u52A1</td></tr></tbody></table><p>Cron \u7684\u8BED\u6CD5\u683C\u5F0F\u53EF\u4EE5\u603B\u7ED3\u4E3A\uFF1A</p><blockquote><p>Seconds Minutes Hours DayofMonth Month DayofWeek</p></blockquote><p>\u6BCF\u4E2A\u65F6\u95F4\u5143\u7D20\u7684\u53D6\u503C\u8303\u56F4\uFF0C\u4EE5\u53CA\u53EF\u51FA\u73B0\u7684\u7279\u6B8A\u5B57\u7B26\u5982\u4E0B\u6240\u793A\u3002</p><table><thead><tr><th>\u65F6\u95F4\u5143\u7D20</th><th>\u53D6\u503C\u8303\u56F4</th><th>\u53EF\u51FA\u73B0\u7684\u7279\u6B8A\u5B57\u7B26</th></tr></thead><tbody><tr><td>\u79D2</td><td><code>[0,59]</code></td><td><code>*,-/</code></td></tr><tr><td>\u5206\u949F</td><td><code>[0,59]</code></td><td><code>*,-/</code></td></tr><tr><td>\u5C0F\u65F6</td><td><code>[0,59]</code></td><td><code>*,-/</code></td></tr><tr><td>\u65E5\u671F</td><td><code>[0,31]</code></td><td><code>*,-/?LW</code></td></tr><tr><td>\u6708\u4EFD</td><td><code>[1,12]</code></td><td><code>*,-/</code></td></tr><tr><td>\u661F\u671F</td><td><code>[1,7]</code></td><td><code>*,-/?L#</code></td></tr></tbody></table><p>\u7279\u6B8A\u5B57\u7B26\u7684\u542B\u4E49\u548C\u793A\u4F8B\u5982\u4E0B\u6240\u793A\u3002</p><table><thead><tr><th>\u7279\u6B8A\u5B57\u7B26</th><th>\u542B\u4E49</th><th>\u793A\u4F8B</th></tr></thead><tbody><tr><td><code>*</code></td><td>\u6240\u6709\u53EF\u80FD\u7684\u503C</td><td>\u5F88\u597D\u7406\u89E3\uFF0C\u6708\u57DF\u4E2D\u4E3A\u6BCF\u4E2A\u6708\uFF0C\u661F\u671F\u57DF\u4E2D\u6BCF\u4E2A\u661F\u671F\u51E0</td></tr><tr><td><code>,</code></td><td>\u679A\u4E3E\u7684\u503C</td><td>\u5F88\u597D\u7406\u89E3\uFF0C\u5C0F\u65F6\u57DF\u4E2D <code>10,14,16</code>\uFF0C\u5C31\u8868\u793A\u8FD9\u51E0\u4E2A\u5C0F\u65F6\u53EF\u9009</td></tr><tr><td><code>-</code></td><td>\u8303\u56F4</td><td>\u5F88\u597D\u7406\u89E3\uFF0C\u5206\u949F\u57DF\u4E2D <code>10-19</code>\uFF0C\u5C31\u8868\u793A 10-19 \u5206\u949F\u6BCF\u9694\u4E00\u5206\u949F\u6267\u884C\u4E00\u6B21</td></tr><tr><td><code>/</code></td><td>\u6307\u5B9A\u6570\u503C\u7684\u589E\u91CF</td><td>\u5F88\u597D\u7406\u89E3\uFF0C\u5206\u949F\u57DF\u4E2D <code>0/15</code>\uFF0C\u5C31\u8868\u793A\u6BCF\u9694 15 \u5206\u949F\u6267\u884C\u4E00\u6B21</td></tr><tr><td><code>?</code></td><td>\u4E0D\u6307\u5B9A\u503C</td><td>\u5F88\u597D\u7406\u89E3\uFF0C\u65E5\u671F\u57DF\u6307\u5B9A\u4E86\u661F\u671F\u57DF\u5C31\u4E0D\u80FD\u6307\u5B9A\u503C\uFF0C\u53CD\u4E4B\u4EA6\u7136\uFF0C\u56E0\u4E3A\u65E5\u671F\u57DF\u548C\u661F\u671F\u57DF\u5C5E\u4E8E\u51B2\u7A81\u5173\u7CFB</td></tr><tr><td><code>L</code></td><td>\u5355\u8BCD Last \u7684\u9996\u5B57\u6BCD</td><td>\u5F88\u597D\u7406\u89E3\uFF0C\u65E5\u671F\u57DF\u548C\u661F\u671F\u57DF\u652F\u6301\uFF0C\u8868\u793A\u6708\u7684\u6700\u540E\u4E00\u5929\u6216\u8005\u661F\u671F\u7684\u6700\u540E\u4E00\u5929</td></tr><tr><td><code>W</code></td><td>\u9664\u5468\u672B\u4EE5\u5916\u7684\u5DE5\u4F5C\u65E5</td><td>\u5F88\u597D\u7406\u89E3\uFF0C\u4EC5\u65E5\u671F\u57DF\u652F\u6301</td></tr><tr><td><code>#</code></td><td>\u6BCF\u4E2A\u6708\u7684\u7B2C\u51E0\u4E2A\u661F\u671F\u51E0</td><td>\u5F88\u597D\u7406\u89E3\uFF0C\u4EC5\u661F\u671F\u57DF\u652F\u6301\uFF0C<code>4#2</code>\u8868\u793A\u67D0\u6708\u7684\u7B2C\u4E8C\u4E2A\u661F\u671F\u56DB</td></tr></tbody></table><h3 id="\u5C0F\u7ED3" tabindex="-1"><a class="header-anchor" href="#\u5C0F\u7ED3" aria-hidden="true">#</a> \u5C0F\u7ED3</h3><p>Spring Task 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noreferrer"},x=s("https://github.com/itwanger/coding-more"),w=s("codingmore-springtask\uFF1A"),S={href:"https://github.com/itwanger/codingmore-learning/tree/main/codingmore-springtask",target:"_blank",rel:"noopener noreferrer"},y=s("https://github.com/itwanger/codingmore-learning"),_=n("p",null,[n("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png",alt:""})],-1);function D(P,j){const a=p("ExternalLinkIcon");return o(),c("div",null,[u,n("p",null,[d,n("a",r,[k,t(a)]),m,v,b]),h,g,n("blockquote",null,[n("ul",null,[n("li",null,[T,n("a",f,[x,t(a)])]),n("li",null,[w,n("a",S,[y,t(a)])])])]),_])}var C=e(l,[["render",D],["__file","springtask.html.vue"]]);export{C as default};
diff --git a/dist/assets/static.html.8ee519bc.js b/dist/assets/static.html.c9732093.js
similarity index 99%
rename from dist/assets/static.html.8ee519bc.js
rename to dist/assets/static.html.c9732093.js
index 4ddfeeef..ed398ca0 100644
--- a/dist/assets/static.html.8ee519bc.js
+++ b/dist/assets/static.html.c9732093.js
@@ -1,4 +1,4 @@
-import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e as t}from"./app.a0271b9c.js";const p={},e=t(`<h1 id="java\u4E2D\u7684static\u5173\u952E\u5B57\u89E3\u6790" tabindex="-1"><a class="header-anchor" href="#java\u4E2D\u7684static\u5173\u952E\u5B57\u89E3\u6790" aria-hidden="true">#</a> Java\u4E2D\u7684static\u5173\u952E\u5B57\u89E3\u6790</h1><p>\u201C\u54E5\uFF0C\u4F60\u7259\u9F88\u80BF\u75DB\u8F7B\u70B9\u6CA1\uFF1F\u5468\u4E00\u7684\u6559\u59B9\u5B66 Java \u4F60\u90FD\u6CA1\u6709\u66F4\u65B0\uFF0C\u5077\u61D2\u4E86\u5440\uFF01\u201D\u4E09\u59B9\u5173\u5FC3\u5730\u95EE\u6211\u3002</p><p>\u201C\u4ECA\u5929\u5468\u56DB\u4E86\uFF0C\u5403\u4E86\u4E09\u5929\u7684\u836F\uFF0C\u75BC\u75DB\u5DF2\u7ECF\u51CF\u8F7B\u4E0D\u5C11\uFF0C\u54B1\u5988\u8FD8\u7ED9\u6211\u6253\u4E86\u7535\u8BDD\uFF0C\u8BA9\u6211\u4E70\u70B9\u725B\u9EC4\u89E3\u6BD2\u7247\u4E0B\u4E0B\u706B\u3002\u201D\u6211\u9762\u5E26\u7740\u5FAE\u7B11\u5BF9\u4E09\u59B9\u8BF4\uFF0C\u201C\u5B66\u4E60\u53EF\u4E0D\u80FD\u843D\u4E0B\uFF0C\u4ECA\u5929\u6211\u4EEC\u6765\u5B66 Java \u4E2D <code>static</code> \u5173\u952E\u5B57\u5427\u3002\u201D</p><p>\u201Cstatic \u662F Java \u4E2D\u6BD4\u8F83\u96BE\u4EE5\u7406\u89E3\u7684\u4E00\u4E2A\u5173\u952E\u5B57\uFF0C\u4E5F\u662F\u5404\u5927\u516C\u53F8\u7684\u9762\u8BD5\u5B98\u6700\u559C\u6B22\u95EE\u5230\u7684\u4E00\u4E2A\u77E5\u8BC6\u70B9\u4E4B\u4E00\u3002\u201D\u6211\u559D\u4E86\u4E00\u53E3\u5496\u5561\u7EE7\u7EED\u8BF4\u9053\u3002</p><p>\u201C\u65E2\u7136\u662F\u9762\u8BD5\u91CD\u70B9\uFF0C\u90A3\u6211\u53EF\u5F97\u597D\u597D\u5B66\u4E60\u4E0B\u3002\u201D\u4E09\u59B9\u8FDE\u5FD9\u8BF4\u3002</p><p>\u201Cstatic \u5173\u952E\u5B57\u7684\u4F5C\u7528\u53EF\u4EE5\u7528\u4E00\u53E5\u8BDD\u6765\u63CF\u8FF0\uFF1A\u2018<strong>\u65B9\u4FBF\u5728\u6CA1\u6709\u521B\u5EFA\u5BF9\u8C61\u7684\u60C5\u51B5\u4E0B\u8FDB\u884C\u8C03\u7528</strong>\uFF0C\u5305\u62EC\u53D8\u91CF\u548C\u65B9\u6CD5\u2019\u3002\u4E5F\u5C31\u662F\u8BF4\uFF0C\u53EA\u8981\u7C7B\u88AB\u52A0\u8F7D\u4E86\uFF0C\u5C31\u53EF\u4EE5\u901A\u8FC7\u7C7B\u540D\u8FDB\u884C\u8BBF\u95EE\u3002\u201D\u6211\u6276\u4E86\u6276\u6C89\u91CD\u773C\u955C\uFF0C\u7EE7\u7EED\u8BF4\u5230\uFF0C\u201Cstatic \u53EF\u4EE5\u7528\u6765\u4FEE\u9970\u7C7B\u7684\u6210\u5458\u53D8\u91CF\uFF0C\u4EE5\u53CA\u6210\u5458\u65B9\u6CD5\u3002\u6211\u4EEC\u4E00\u4E2A\u4E2A\u6765\u770B\u3002\u201D</p><h3 id="_01\u3001\u9759\u6001\u53D8\u91CF" tabindex="-1"><a class="header-anchor" href="#_01\u3001\u9759\u6001\u53D8\u91CF" aria-hidden="true">#</a> 01\u3001\u9759\u6001\u53D8\u91CF</h3><p>\u201C\u5982\u679C\u5728\u58F0\u660E\u53D8\u91CF\u7684\u65F6\u5019\u4F7F\u7528\u4E86 static \u5173\u952E\u5B57\uFF0C\u90A3\u4E48\u8FD9\u4E2A\u53D8\u91CF\u5C31\u88AB\u79F0\u4E3A\u9759\u6001\u53D8\u91CF\u3002\u9759\u6001\u53D8\u91CF\u53EA\u5728\u7C7B\u52A0\u8F7D\u7684\u65F6\u5019\u83B7\u53D6\u4E00\u6B21\u5185\u5B58\u7A7A\u95F4\uFF0C\u8FD9\u4F7F\u5F97\u9759\u6001\u53D8\u91CF\u5F88\u8282\u7701\u5185\u5B58\u7A7A\u95F4\u3002\u201D\u5BB6\u91CC\u7684\u6696\u6C14\u6709\u70B9\u8DB3\uFF0C\u6211\u8DD1\u53BB\u5F00\u4E86\u4E00\u70B9\u7A97\u6237\u540E\u7EE7\u7EED\u8BF4\u9053\u3002</p><p>\u201C\u6765\u8003\u8651\u8FD9\u6837\u4E00\u4E2A Student \u7C7B\u3002\u201D\u8BDD\u97F3\u521A\u843D\uFF0C\u6211\u5C31\u5728\u952E\u76D8\u4E0A\u567C\u91CC\u556A\u5566\u4E00\u9635\u6572\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">Student</span> <span class="token punctuation">{</span>
+import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e as t}from"./app.615e41d8.js";const p={},e=t(`<h1 id="java\u4E2D\u7684static\u5173\u952E\u5B57\u89E3\u6790" tabindex="-1"><a class="header-anchor" href="#java\u4E2D\u7684static\u5173\u952E\u5B57\u89E3\u6790" aria-hidden="true">#</a> Java\u4E2D\u7684static\u5173\u952E\u5B57\u89E3\u6790</h1><p>\u201C\u54E5\uFF0C\u4F60\u7259\u9F88\u80BF\u75DB\u8F7B\u70B9\u6CA1\uFF1F\u5468\u4E00\u7684\u6559\u59B9\u5B66 Java \u4F60\u90FD\u6CA1\u6709\u66F4\u65B0\uFF0C\u5077\u61D2\u4E86\u5440\uFF01\u201D\u4E09\u59B9\u5173\u5FC3\u5730\u95EE\u6211\u3002</p><p>\u201C\u4ECA\u5929\u5468\u56DB\u4E86\uFF0C\u5403\u4E86\u4E09\u5929\u7684\u836F\uFF0C\u75BC\u75DB\u5DF2\u7ECF\u51CF\u8F7B\u4E0D\u5C11\uFF0C\u54B1\u5988\u8FD8\u7ED9\u6211\u6253\u4E86\u7535\u8BDD\uFF0C\u8BA9\u6211\u4E70\u70B9\u725B\u9EC4\u89E3\u6BD2\u7247\u4E0B\u4E0B\u706B\u3002\u201D\u6211\u9762\u5E26\u7740\u5FAE\u7B11\u5BF9\u4E09\u59B9\u8BF4\uFF0C\u201C\u5B66\u4E60\u53EF\u4E0D\u80FD\u843D\u4E0B\uFF0C\u4ECA\u5929\u6211\u4EEC\u6765\u5B66 Java \u4E2D <code>static</code> \u5173\u952E\u5B57\u5427\u3002\u201D</p><p>\u201Cstatic \u662F Java \u4E2D\u6BD4\u8F83\u96BE\u4EE5\u7406\u89E3\u7684\u4E00\u4E2A\u5173\u952E\u5B57\uFF0C\u4E5F\u662F\u5404\u5927\u516C\u53F8\u7684\u9762\u8BD5\u5B98\u6700\u559C\u6B22\u95EE\u5230\u7684\u4E00\u4E2A\u77E5\u8BC6\u70B9\u4E4B\u4E00\u3002\u201D\u6211\u559D\u4E86\u4E00\u53E3\u5496\u5561\u7EE7\u7EED\u8BF4\u9053\u3002</p><p>\u201C\u65E2\u7136\u662F\u9762\u8BD5\u91CD\u70B9\uFF0C\u90A3\u6211\u53EF\u5F97\u597D\u597D\u5B66\u4E60\u4E0B\u3002\u201D\u4E09\u59B9\u8FDE\u5FD9\u8BF4\u3002</p><p>\u201Cstatic \u5173\u952E\u5B57\u7684\u4F5C\u7528\u53EF\u4EE5\u7528\u4E00\u53E5\u8BDD\u6765\u63CF\u8FF0\uFF1A\u2018<strong>\u65B9\u4FBF\u5728\u6CA1\u6709\u521B\u5EFA\u5BF9\u8C61\u7684\u60C5\u51B5\u4E0B\u8FDB\u884C\u8C03\u7528</strong>\uFF0C\u5305\u62EC\u53D8\u91CF\u548C\u65B9\u6CD5\u2019\u3002\u4E5F\u5C31\u662F\u8BF4\uFF0C\u53EA\u8981\u7C7B\u88AB\u52A0\u8F7D\u4E86\uFF0C\u5C31\u53EF\u4EE5\u901A\u8FC7\u7C7B\u540D\u8FDB\u884C\u8BBF\u95EE\u3002\u201D\u6211\u6276\u4E86\u6276\u6C89\u91CD\u773C\u955C\uFF0C\u7EE7\u7EED\u8BF4\u5230\uFF0C\u201Cstatic \u53EF\u4EE5\u7528\u6765\u4FEE\u9970\u7C7B\u7684\u6210\u5458\u53D8\u91CF\uFF0C\u4EE5\u53CA\u6210\u5458\u65B9\u6CD5\u3002\u6211\u4EEC\u4E00\u4E2A\u4E2A\u6765\u770B\u3002\u201D</p><h3 id="_01\u3001\u9759\u6001\u53D8\u91CF" tabindex="-1"><a class="header-anchor" href="#_01\u3001\u9759\u6001\u53D8\u91CF" aria-hidden="true">#</a> 01\u3001\u9759\u6001\u53D8\u91CF</h3><p>\u201C\u5982\u679C\u5728\u58F0\u660E\u53D8\u91CF\u7684\u65F6\u5019\u4F7F\u7528\u4E86 static \u5173\u952E\u5B57\uFF0C\u90A3\u4E48\u8FD9\u4E2A\u53D8\u91CF\u5C31\u88AB\u79F0\u4E3A\u9759\u6001\u53D8\u91CF\u3002\u9759\u6001\u53D8\u91CF\u53EA\u5728\u7C7B\u52A0\u8F7D\u7684\u65F6\u5019\u83B7\u53D6\u4E00\u6B21\u5185\u5B58\u7A7A\u95F4\uFF0C\u8FD9\u4F7F\u5F97\u9759\u6001\u53D8\u91CF\u5F88\u8282\u7701\u5185\u5B58\u7A7A\u95F4\u3002\u201D\u5BB6\u91CC\u7684\u6696\u6C14\u6709\u70B9\u8DB3\uFF0C\u6211\u8DD1\u53BB\u5F00\u4E86\u4E00\u70B9\u7A97\u6237\u540E\u7EE7\u7EED\u8BF4\u9053\u3002</p><p>\u201C\u6765\u8003\u8651\u8FD9\u6837\u4E00\u4E2A Student \u7C7B\u3002\u201D\u8BDD\u97F3\u521A\u843D\uFF0C\u6211\u5C31\u5728\u952E\u76D8\u4E0A\u567C\u91CC\u556A\u5566\u4E00\u9635\u6572\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">Student</span> <span class="token punctuation">{</span>
     <span class="token class-name">String</span> name<span class="token punctuation">;</span>
     <span class="token keyword">int</span> age<span class="token punctuation">;</span>
     <span class="token class-name">String</span> school <span class="token operator">=</span> <span class="token string">&quot;\u90D1\u5DDE\u5927\u5B66&quot;</span><span class="token punctuation">;</span>
diff --git a/dist/assets/stream.html.db791f6b.js b/dist/assets/stream.html.02d08777.js
similarity index 99%
rename from dist/assets/stream.html.db791f6b.js
rename to dist/assets/stream.html.02d08777.js
index 0a3fe44f..8c0174bb 100644
--- a/dist/assets/stream.html.db791f6b.js
+++ b/dist/assets/stream.html.02d08777.js
@@ -1,4 +1,4 @@
-import{_ as e}from"./plugin-vue_export-helper.21dcd24c.js";import{r as c,o,c as l,a as s,b as p,e as a,d as n}from"./app.a0271b9c.js";const u={},i=a(`<h1 id="java-8-stream\u6D41\u8BE6\u7EC6\u7528\u6CD5" tabindex="-1"><a class="header-anchor" href="#java-8-stream\u6D41\u8BE6\u7EC6\u7528\u6CD5" aria-hidden="true">#</a> Java 8 Stream\u6D41\u8BE6\u7EC6\u7528\u6CD5</h1><p>\u4E24\u4E2A\u661F\u671F\u4EE5\u524D\uFF0C\u5C31\u6709\u8BFB\u8005\u5F3A\u70C8\u8981\u6C42\u6211\u5199\u4E00\u7BC7 Java Stream \u6D41\u7684\u6587\u7AE0\uFF0C\u6211\u8BF4\u5E02\u9762\u4E0A\u4E0D\u662F\u5DF2\u7ECF\u6709\u5F88\u591A\u4E86\u5417\uFF0C\u7ED3\u679C\u4F60\u731C\u4ED6\u600E\u4E48\u8BF4\uFF1A\u201C\u5C31\u60F3\u770B\u4F60\u5199\u7684\u554A\uFF01\u201D\u4F60\u770B\u4F60\u770B\uFF0C\u591A\u4E48\u82CD\u767D\u7684\u559C\u6B22\u554A\u3002\u90A3\u5C31\u201C\u52C9\u4E3A\u5176\u96BE\u201D\u5199\u4E00\u7BC7\u5427\uFF0C\u563B\u563B\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/java8/stream-1.jpg" alt=""></p><p>\u5355\u4ECE\u201CStream\u201D\u8FD9\u4E2A\u5355\u8BCD\u4E0A\u6765\u770B\uFF0C\u5B83\u4F3C\u4E4E\u548C java.io \u5305\u4E0B\u7684 InputStream \u548C OutputStream \u6709\u4E9B\u5173\u7CFB\u3002\u5B9E\u9645\u4E0A\u5462\uFF0C\u6CA1\u6BDB\u5173\u7CFB\u3002Java 8 \u65B0\u589E\u7684 Stream \u662F\u4E3A\u4E86\u89E3\u653E\u7A0B\u5E8F\u5458\u64CD\u4F5C\u96C6\u5408\uFF08Collection\uFF09\u65F6\u7684\u751F\u4EA7\u529B\uFF0C\u4E4B\u6240\u4EE5\u80FD\u89E3\u653E\uFF0C\u5F88\u5927\u4E00\u90E8\u5206\u539F\u56E0\u53EF\u4EE5\u5F52\u529F\u4E8E\u540C\u65F6\u51FA\u73B0\u7684 Lambda \u8868\u8FBE\u5F0F\u2014\u2014\u6781\u5927\u7684\u63D0\u9AD8\u4E86\u7F16\u7A0B\u6548\u7387\u548C\u7A0B\u5E8F\u53EF\u8BFB\u6027\u3002</p><p>Stream \u7A76\u7ADF\u662F\u4EC0\u4E48\u5462\uFF1F</p><blockquote><p>Stream \u5C31\u597D\u50CF\u4E00\u4E2A\u9AD8\u7EA7\u7684\u8FED\u4EE3\u5668\uFF0C\u4F46\u53EA\u80FD\u904D\u5386\u4E00\u6B21\uFF0C\u5C31\u597D\u50CF\u4E00\u6C5F\u6625\u6C34\u5411\u4E1C\u6D41\uFF1B\u5728\u6D41\u7684\u8FC7\u7A0B\u4E2D\uFF0C\u5BF9\u6D41\u4E2D\u7684\u5143\u7D20\u6267\u884C\u4E00\u4E9B\u64CD\u4F5C\uFF0C\u6BD4\u5982\u201C\u8FC7\u6EE4\u6389\u957F\u5EA6\u5927\u4E8E 10 \u7684\u5B57\u7B26\u4E32\u201D\u3001\u201C\u83B7\u53D6\u6BCF\u4E2A\u5B57\u7B26\u4E32\u7684\u9996\u5B57\u6BCD\u201D\u7B49\u3002</p></blockquote><p>\u8981\u60F3\u64CD\u4F5C\u6D41\uFF0C\u9996\u5148\u9700\u8981\u6709\u4E00\u4E2A\u6570\u636E\u6E90\uFF0C\u53EF\u4EE5\u662F\u6570\u7EC4\u6216\u8005\u96C6\u5408\u3002\u6BCF\u6B21\u64CD\u4F5C\u90FD\u4F1A\u8FD4\u56DE\u4E00\u4E2A\u65B0\u7684\u6D41\u5BF9\u8C61\uFF0C\u65B9\u4FBF\u8FDB\u884C\u94FE\u5F0F\u64CD\u4F5C\uFF0C\u4F46\u539F\u6709\u7684\u6D41\u5BF9\u8C61\u4F1A\u4FDD\u6301\u4E0D\u53D8\u3002</p><p>\u6D41\u7684\u64CD\u4F5C\u53EF\u4EE5\u5206\u4E3A\u4E24\u79CD\u7C7B\u578B\uFF1A</p><p>1\uFF09\u4E2D\u95F4\u64CD\u4F5C\uFF0C\u53EF\u4EE5\u6709\u591A\u4E2A\uFF0C\u6BCF\u6B21\u8FD4\u56DE\u4E00\u4E2A\u65B0\u7684\u6D41\uFF0C\u53EF\u8FDB\u884C\u94FE\u5F0F\u64CD\u4F5C\u3002</p><p>2\uFF09\u7EC8\u7AEF\u64CD\u4F5C\uFF0C\u53EA\u80FD\u6709\u4E00\u4E2A\uFF0C\u6BCF\u6B21\u6267\u884C\u5B8C\uFF0C\u8FD9\u4E2A\u6D41\u4E5F\u5C31\u7528\u5149\u5149\u4E86\uFF0C\u65E0\u6CD5\u6267\u884C\u4E0B\u4E00\u4E2A\u64CD\u4F5C\uFF0C\u56E0\u6B64\u53EA\u80FD\u653E\u5728\u6700\u540E\u3002</p><p>\u6765\u4E3E\u4E2A\u4F8B\u5B50\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">List</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">String</span><span class="token punctuation">&gt;</span></span> list <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">ArrayList</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token punctuation">&gt;</span></span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
+import{_ as e}from"./plugin-vue_export-helper.21dcd24c.js";import{r as c,o,c as l,a as s,b as p,e as a,d as n}from"./app.615e41d8.js";const u={},i=a(`<h1 id="java-8-stream\u6D41\u8BE6\u7EC6\u7528\u6CD5" tabindex="-1"><a class="header-anchor" href="#java-8-stream\u6D41\u8BE6\u7EC6\u7528\u6CD5" aria-hidden="true">#</a> Java 8 Stream\u6D41\u8BE6\u7EC6\u7528\u6CD5</h1><p>\u4E24\u4E2A\u661F\u671F\u4EE5\u524D\uFF0C\u5C31\u6709\u8BFB\u8005\u5F3A\u70C8\u8981\u6C42\u6211\u5199\u4E00\u7BC7 Java Stream \u6D41\u7684\u6587\u7AE0\uFF0C\u6211\u8BF4\u5E02\u9762\u4E0A\u4E0D\u662F\u5DF2\u7ECF\u6709\u5F88\u591A\u4E86\u5417\uFF0C\u7ED3\u679C\u4F60\u731C\u4ED6\u600E\u4E48\u8BF4\uFF1A\u201C\u5C31\u60F3\u770B\u4F60\u5199\u7684\u554A\uFF01\u201D\u4F60\u770B\u4F60\u770B\uFF0C\u591A\u4E48\u82CD\u767D\u7684\u559C\u6B22\u554A\u3002\u90A3\u5C31\u201C\u52C9\u4E3A\u5176\u96BE\u201D\u5199\u4E00\u7BC7\u5427\uFF0C\u563B\u563B\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/java8/stream-1.jpg" alt=""></p><p>\u5355\u4ECE\u201CStream\u201D\u8FD9\u4E2A\u5355\u8BCD\u4E0A\u6765\u770B\uFF0C\u5B83\u4F3C\u4E4E\u548C java.io \u5305\u4E0B\u7684 InputStream \u548C OutputStream \u6709\u4E9B\u5173\u7CFB\u3002\u5B9E\u9645\u4E0A\u5462\uFF0C\u6CA1\u6BDB\u5173\u7CFB\u3002Java 8 \u65B0\u589E\u7684 Stream \u662F\u4E3A\u4E86\u89E3\u653E\u7A0B\u5E8F\u5458\u64CD\u4F5C\u96C6\u5408\uFF08Collection\uFF09\u65F6\u7684\u751F\u4EA7\u529B\uFF0C\u4E4B\u6240\u4EE5\u80FD\u89E3\u653E\uFF0C\u5F88\u5927\u4E00\u90E8\u5206\u539F\u56E0\u53EF\u4EE5\u5F52\u529F\u4E8E\u540C\u65F6\u51FA\u73B0\u7684 Lambda \u8868\u8FBE\u5F0F\u2014\u2014\u6781\u5927\u7684\u63D0\u9AD8\u4E86\u7F16\u7A0B\u6548\u7387\u548C\u7A0B\u5E8F\u53EF\u8BFB\u6027\u3002</p><p>Stream \u7A76\u7ADF\u662F\u4EC0\u4E48\u5462\uFF1F</p><blockquote><p>Stream \u5C31\u597D\u50CF\u4E00\u4E2A\u9AD8\u7EA7\u7684\u8FED\u4EE3\u5668\uFF0C\u4F46\u53EA\u80FD\u904D\u5386\u4E00\u6B21\uFF0C\u5C31\u597D\u50CF\u4E00\u6C5F\u6625\u6C34\u5411\u4E1C\u6D41\uFF1B\u5728\u6D41\u7684\u8FC7\u7A0B\u4E2D\uFF0C\u5BF9\u6D41\u4E2D\u7684\u5143\u7D20\u6267\u884C\u4E00\u4E9B\u64CD\u4F5C\uFF0C\u6BD4\u5982\u201C\u8FC7\u6EE4\u6389\u957F\u5EA6\u5927\u4E8E 10 \u7684\u5B57\u7B26\u4E32\u201D\u3001\u201C\u83B7\u53D6\u6BCF\u4E2A\u5B57\u7B26\u4E32\u7684\u9996\u5B57\u6BCD\u201D\u7B49\u3002</p></blockquote><p>\u8981\u60F3\u64CD\u4F5C\u6D41\uFF0C\u9996\u5148\u9700\u8981\u6709\u4E00\u4E2A\u6570\u636E\u6E90\uFF0C\u53EF\u4EE5\u662F\u6570\u7EC4\u6216\u8005\u96C6\u5408\u3002\u6BCF\u6B21\u64CD\u4F5C\u90FD\u4F1A\u8FD4\u56DE\u4E00\u4E2A\u65B0\u7684\u6D41\u5BF9\u8C61\uFF0C\u65B9\u4FBF\u8FDB\u884C\u94FE\u5F0F\u64CD\u4F5C\uFF0C\u4F46\u539F\u6709\u7684\u6D41\u5BF9\u8C61\u4F1A\u4FDD\u6301\u4E0D\u53D8\u3002</p><p>\u6D41\u7684\u64CD\u4F5C\u53EF\u4EE5\u5206\u4E3A\u4E24\u79CD\u7C7B\u578B\uFF1A</p><p>1\uFF09\u4E2D\u95F4\u64CD\u4F5C\uFF0C\u53EF\u4EE5\u6709\u591A\u4E2A\uFF0C\u6BCF\u6B21\u8FD4\u56DE\u4E00\u4E2A\u65B0\u7684\u6D41\uFF0C\u53EF\u8FDB\u884C\u94FE\u5F0F\u64CD\u4F5C\u3002</p><p>2\uFF09\u7EC8\u7AEF\u64CD\u4F5C\uFF0C\u53EA\u80FD\u6709\u4E00\u4E2A\uFF0C\u6BCF\u6B21\u6267\u884C\u5B8C\uFF0C\u8FD9\u4E2A\u6D41\u4E5F\u5C31\u7528\u5149\u5149\u4E86\uFF0C\u65E0\u6CD5\u6267\u884C\u4E0B\u4E00\u4E2A\u64CD\u4F5C\uFF0C\u56E0\u6B64\u53EA\u80FD\u653E\u5728\u6700\u540E\u3002</p><p>\u6765\u4E3E\u4E2A\u4F8B\u5B50\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">List</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">String</span><span class="token punctuation">&gt;</span></span> list <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">ArrayList</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token punctuation">&gt;</span></span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 list<span class="token punctuation">.</span><span class="token function">add</span><span class="token punctuation">(</span><span class="token string">&quot;\u6B66\u6C49\u52A0\u6CB9&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 list<span class="token punctuation">.</span><span class="token function">add</span><span class="token punctuation">(</span><span class="token string">&quot;\u4E2D\u56FD\u52A0\u6CB9&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 list<span class="token punctuation">.</span><span class="token function">add</span><span class="token punctuation">(</span><span class="token string">&quot;\u4E16\u754C\u52A0\u6CB9&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
diff --git a/dist/assets/suzhou.html.1f658a4a.js b/dist/assets/suzhou.html.1f658a4a.js
deleted file mode 100644
index 407cf75b..00000000
--- a/dist/assets/suzhou.html.1f658a4a.js
+++ /dev/null
@@ -1 +0,0 @@
-const e={key:"v-3819c1f4",path:"/cityselect/suzhou.html",title:"\u60F3\u642C\u53BB\u82CF\u5DDE\u751F\u6D3B\u4E86\u3002\u3002",lang:"zh-CN",frontmatter:{category:["\u6C42\u804C\u9762\u8BD5"],tag:["\u57CE\u5E02\u9009\u62E9"],summary:"\u60F3\u642C\u53BB\u82CF\u5DDE\u751F\u6D3B\u4E86\u3002\u3002 \u5927\u5BB6\u597D\uFF0C\u6211\u662F\u4E8C\u54E5\u5440\uFF01 \u8001\u8BFB\u8005\u5E94\u8BE5\u90FD\u77E5\u9053\u4E86\uFF0C\u4E8C\u54E5\u7B2C\u4E00\u4EFD\u5DE5\u4F5C\u5C31\u662F\u5728\u82CF\u5DDE\u7684\u4E00\u5BB6\u5916\u4F01\u5EA6\u8FC7\u7684\u3002\u9664\u4E86\u6D1B\u9633\uFF0C\u5C31\u5C5E\u82CF\u5DDE\u751F\u6D3B\u7684\u65F6\u95F4\u6700\u957F\u4E86\uFF0C\u540C\u4E8B nice\u3001\u73AF\u5883 nice\u3001\u8863\u98DF\u4F4F\u884C\u4E5F nice\u3002 \u521D\u51FA\u8305\u5E90\u7684\u81EA\u5DF1\uFF0C\u66FE\u65E0\u6570\u6B21\u60F3\u8C61\u81EA\u5DF1\u5728\u82CF\u5DDE\u5B89\u5BB6\u7684\u6837\u5B50\uFF0C\u4E70\u4E00\u5957\u5927\u623F\u5B50\uFF0C\u628A\u7236\u6BCD\u4E5F\u63A5\u8FC7\u6765\u4E00\u8D77\u4F4F\uFF0C\u55EF\u3002\u3002 \u53BB\u5E74\u8FD9\u4E2A\u65F6\u5019\uFF0C\u4E5F\u6709\u8BFB\u8005\u95EE\u6211\u662F\u5728\u82CF\u5DDE\u7684\u54EA\u4E00\u5BB6\u5916\u4F01\uFF0C\u4ED6\u8001\u5BB6\u5C31\u662F\u5728\u82CF\u5DDE\u3002\u3002",head:[["meta",{property:"og:url",content:"https://tobebetterjavaer.com/cityselect/suzhou.html"}],["meta",{property:"og:site_name",content:"Java \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF"}],["meta",{property:"og:title",content:"\u60F3\u642C\u53BB\u82CF\u5DDE\u751F\u6D3B\u4E86\u3002\u3002"}],["meta",{property:"og:type",content:"article"}],["meta",{property:"og:updated_time",content:"2022-05-13T23:14:28.000Z"}],["meta",{property:"og:locale",content:"zh-CN"}],["meta",{property:"article:tag",content:"\u57CE\u5E02\u9009\u62E9"}],["meta",{property:"article:modified_time",content:"2022-05-13T23:14:28.000Z"}]]},excerpt:"",headers:[{level:2,title:"\u5DE5\u4F5C\u673A\u4F1A",slug:"\u5DE5\u4F5C\u673A\u4F1A",children:[{level:3,title:"\u5FAE\u8F6F",slug:"\u5FAE\u8F6F",children:[]},{level:3,title:"ZOOM",slug:"zoom",children:[]},{level:3,title:"\u534E\u4E3A",slug:"\u534E\u4E3A",children:[]},{level:3,title:"360",slug:"_360",children:[]},{level:3,title:"Momenta",slug:"momenta",children:[]},{level:3,title:"\u4F01\u67E5\u67E5",slug:"\u4F01\u67E5\u67E5",children:[]},{level:3,title:"\u6536\u94B1\u5427",slug:"\u6536\u94B1\u5427",children:[]},{level:3,title:"\u4E2D\u56FD\u79FB\u52A8\u82CF\u5DDE\u7814\u7A76\u9662",slug:"\u4E2D\u56FD\u79FB\u52A8\u82CF\u5DDE\u7814\u7A76\u9662",children:[]}]},{level:2,title:"\u751F\u6D3B",slug:"\u751F\u6D3B",children:[{level:3,title:"\u6559\u80B2",slug:"\u6559\u80B2",children:[]},{level:3,title:"\u623F\u4EF7",slug:"\u623F\u4EF7",children:[]},{level:3,title:"\u5A31\u4E50&\u4EA4\u901A&\u7F8E\u98DF",slug:"\u5A31\u4E50-\u4EA4\u901A-\u7F8E\u98DF",children:[]}]}],git:{createdTime:164837021e4,updatedTime:1652483668e3,contributors:[{name:"itwanger",email:"www.qing_gee@163.com",commits:3},{name:"\u6C89\u9ED8\u738B\u4E8C",email:"www.qing_gee@163.com",commits:1}]},readingTime:{minutes:10.58,words:3173},filePathRelative:"cityselect/suzhou.md"};export{e as data};
diff --git a/dist/assets/suzhou.html.428c3730.js b/dist/assets/suzhou.html.428c3730.js
new file mode 100644
index 00000000..5510a925
--- /dev/null
+++ b/dist/assets/suzhou.html.428c3730.js
@@ -0,0 +1 @@
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diff --git a/dist/assets/suzhou.html.b2ed5bbc.js b/dist/assets/suzhou.html.b2ed5bbc.js
new file mode 100644
index 00000000..1173f279
--- /dev/null
+++ b/dist/assets/suzhou.html.b2ed5bbc.js
@@ -0,0 +1 @@
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\u5143\u3002</p>',16),d=t("\u6211\u6709\u70B9\u6309\u637A\u4E0D\u4F4F\u60F3\u7ED9\u82CF\u5DDE\u5FAE\u8F6F\u6295\u7B80\u5386\u4E86\u3002\u5FAE\u8F6F\u6821\u62DB\u9762\u8BD5\u5BF9\u4E8E\u624B\u6495\u4EE3\u7801\u7684\u8003\u5BDF\u662F\u5F88\u4E25\u683C\u7684\uFF0C\u5982\u679C\u60F3\u8981\u53BB\u5FAE\u8F6F\u7684\u4E00\u5B9A\u8981\u591A\u5237\u4EE3\u7801\u9898\u3002\u5982\u679C\u4F60\u8D70\u793E\u62DB\u8FDB\u5FAE\u8F6F\u7684\u8BDD\uFF0C\u4E0D\u6B62\u662F\u8981\u5237\u597D\u9898\uFF0C\u8FD8\u8981\u591A\u51C6\u5907\u7CFB\u7EDF\u8BBE\u8BA1\u7684\u76F8\u5173\u77E5\u8BC6\uFF0C\u8FD9\u4E2A\u4E5F\u662F\u53EF\u4EE5\u9488\u5BF9\u6027\u51C6\u5907\u7684\uFF0C\u53EF\u4EE5\u770B\u6211\u8FD9\u7BC7\u6587\u7AE0--"),b={href:"https://mp.weixin.qq.com/s/Thd7AsuPq1c0Wgog-Ku0Bg",target:"_blank",rel:"noopener noreferrer"},m=t("\u5927\u578B\u7CFB\u7EDF\u8BBE\u8BA1\u65B9\u6848"),g=t("\uFF0C\u53E6\u5916\u5982\u679C\u60F3\u51C6\u5907\u9762\u8BD5\u5E38\u95EE\u516B\u80A1\u6587\uFF0C\u4E5F\u53EF\u4EE5\u770B\u8FD9\u91CC-"),l={href:"https://mp.weixin.qq.com/s/1gXVd_6BEmaocu1NA4YToQ",target:"_blank",rel:"noopener noreferrer"},f=t("\u516B\u80A1\u6587\u5408\u96C6"),u=o('<h3 id="zoom" tabindex="-1"><a class="header-anchor" href="#zoom" aria-hidden="true">#</a> ZOOM</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/suzhou-ce9a78ef-6a18-4adf-8a4f-de7b7fa34b45.png" alt=""></p><p>\u5728\u82CF\u5DDE\uFF0CZoom\u662F\u9664\u5FAE\u8F6F\u5916\u7684\u53E6\u4E00\u4E2A\u597D\u9009\u62E9\u3002Zoom \u66FE\u7ECF\u88AB\u8BC4\u4E3A\u5168\u7403\u6700\u4F73\u96C7\u4E3B\u3002\u6839\u636E zoom \u5458\u5DE5\u7684\u8BF4\u6CD5\uFF0Czoom\u7684\u6280\u672F\u6C34\u5E73\u5927\u6982\u548C\u56FD\u5185\u4E8C\u4E09\u7EBF\u5382\u7684\u6C34\u5E73\u5DEE\u4E0D\u591A\u3002\u85AA\u8D44\u65B9\u9762\uFF0C\u6BD4\u56FD\u5185\u4E92\u8054\u7F51\u4E5F\u8981\u4F4E\u4E00\u4E9B\uFF0C\u770B\u5230\u4E00\u4E2A\u6821\u62DB\u85AA\u8D44\u7684\u7206\u6599\uFF0C\u4E00\u4E2A\u505A\u524D\u7AEF\u7684\u7855\u58EB\u5728\u82CF\u5DDEzoom\u7684\u85AA\u8D44\u662F17k * 14\u3002\u989D\u5916\u6709 7 \u4E07\u7F8E\u5143\u7684\u80A1\u7968\uFF0C\u5206 4 \u5E74\u53D1\u5B8C\u3002\u867D\u7136 base \u85AA\u8D44\u65B9\u9762\u76F8\u5BF9\u4F4E\u4E00\u4E9B\uFF0C\u4F46\u662F zoom \u5DE5\u4F5C\u662F\u771F\u7684\u723D\u5440\uFF0C\u6CA1\u6709 996\uFF0C\u6CA1\u6709 kpi\uFF0C\u529E\u516C\u73AF\u5883\u597D\uFF0C\u65E0\u9650\u96F6\u98DF\u548C\u6C34\u679C\u4F9B\u5E94\uFF0C\u8FD9\u8FD8\u8981\u5565\u81EA\u884C\u8F66\u3002</p><h3 id="\u534E\u4E3A" tabindex="-1"><a class="header-anchor" href="#\u534E\u4E3A" aria-hidden="true">#</a> \u534E\u4E3A</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/suzhou-8bd7e5d1-1984-43f7-84e1-b02141160a37.png" alt=""></p><p>\u534E\u4E3A\u5728\u82CF\u5DDE\u7684\u7814\u7A76\u9662\u8BBE\u7ACB\u65F6\u95F4\u4E0D\u957F\u3002\u534E\u4E3A\u7684\u82CF\u7814\u9662\u7684\u52A0\u73ED\u5728\u5404\u5730\u6240\u6709\u7684\u7814\u53D1\u4E2D\u5FC3\u4E2D\u662F\u6392\u7684\u4E0A\u53F7\u7684\u3002\u534E\u4E3A\u5404\u5730\u7814\u53D1\u4E2D\u5FC3\u7684\u5FD9\u788C\u7A0B\u5EA6\u5DEE\u4E0D\u591A\u662F\u6210\u90FD \u300B= \u897F\u5B89 \u300B= \u82CF\u5DDE &gt; \u6B66\u6C49 &gt; \u4E1C\u839E &gt; \u676D\u5DDE &gt; \u5357\u4EAC &gt; \u6DF1\u5733 &gt; \u5317\u4EAC &gt; \u4E0A\u6D77\uFF08\u6574\u4F53\u611F\u89C9\u662F\u8FD9\u6837\uFF0C\u6BCF\u4E2A\u7814\u53D1\u4E2D\u5FC3\u5404\u90E8\u95E8\u7684\u52A0\u73ED\u60C5\u51B5\u4E5F\u4E0D\u540C\uFF09\u3002\u4E0D\u8FC7\u534E\u4E3A\u6709\u4E00\u4E2A\u597D\u5904\u5C31\u662F\u4F60\u6323\u7684\u94B1\u80FD\u548C\u4F60\u7684\u4ED8\u51FA\u6210\u6B63\u6BD4\uFF0C\u6240\u4EE5\u60F3\u5FEB\u901F\u6323\u94B1\u7684\u8FD8\u662F\u5EFA\u8BAE\u53BB\u3002</p><h3 id="_360" tabindex="-1"><a class="header-anchor" href="#_360" aria-hidden="true">#</a> 360</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/suzhou-85547b36-15da-443f-b7f2-878bfd06e997.png" alt=""></p><p>360 \u6765\u82CF\u5DDE\u65F6\u95F4\u4E0D\u957F\uFF0C2018\u5E74\u624D\u9010\u6E10\u5F00\u59CB\u5728\u82CF\u5DDE\u8BBE\u7ACB\u5F00\u53D1\u90E8\u95E8\u3002\u76EE\u524D 360 \u82CF\u5DDE\u5305\u542B\u4E86\u672A\u6765\u5B89\u5168\u7814\u7A76\u3001360\u653F\u4F01\u3001\u5B89\u5168\u7B49\u90E8\u95E8\u3002\u76EE\u524D 360\u82CF\u5DDE\u7684\u85AA\u8D44\u6C34\u5E73\u662F\u5317\u4EAC\u4E0A\u6D77\u85AA\u8D44\u6C34\u5E73\u7684 8 \u6298\uFF0C\u770B\u5230 21 \u5E74\u6BD5\u4E1A\u7684\u4E00\u4E2A\u5E94\u5C4A\u7855\u58EB\u7206\u6599\u6708\u85AA\u662F 16k\uFF0C\u5DE5\u8D44\u6709\u70B9\u5C11\uFF0C\u4E0D\u8FC7\u611F\u89C9\u5728\u82CF\u5DDE\u4E5F\u4E0D\u9519\u5440\u3002</p><h3 id="momenta" tabindex="-1"><a class="header-anchor" href="#momenta" aria-hidden="true">#</a> Momenta</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/suzhou-c4c83915-04b5-4660-9bad-32989a65116d.png" alt=""></p><p>\u4E00\u5F00\u59CB\u6211\u5BF9 Momenta \u8FD8\u771F\u6CA1\u4EC0\u4E48\u4E86\u89E3\uFF0C\u76F4\u5230\u6211\u6709\u4E00\u5929\u7A81\u7136\u5728\u6821\u62DB\u85AA\u6C34\u4E0A\u641C\u4E86\u4E0B Momenta\uFF0C\u7136\u540E\u6211\u4E0D\u7531\u5F97\u76F4\u547C\u5367\u69FD\uFF0C\u8FD9\u7279\u4E48\u662F\u7ED9\u5E94\u5C4A\u751F\u7684\u85AA\u8D44\uFF1F\u8BA4\u771F\u7684\uFF1F</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/suzhou-ff400245-2fe0-437e-8dd3-aa9eed650e99.png" alt=""></p><p>\u7136\u540E\u6211\u8BE6\u7EC6\u7684\u4E86\u89E3\u4E86\u4E0B\u8FD9\u5BB6\u516C\u53F8\uFF0C\u8FD9\u662F\u4E00\u5BB6\u505A\u81EA\u52A8\u9A7E\u9A76\u7684\u516C\u53F8\uFF0C\u521B\u7ACB\u65F6\u95F4\u4E5F\u4E0D\u957F\uFF0C2016\u5E74\u521B\u7ACB\u7684\u3002\u4E0D\u8FC7\u636E\u8BF4\u8FD9\u5BB6\u516C\u53F8\u52A0\u73ED\u7279\u522B\u731B\uFF0C\u6709\u7684\u7EC4 10 10 5\uFF0C\u6709\u7684\u7EC4 996\uFF0C\u6709\u7684\u7EC4\u6BD4 996 \u8FD8\u8981\u7D2F\u3002Momenta \u73B0\u5728\u80FD\u7ED9\u7684\u8D77\u8FD9\u4E48\u9AD8\u7684\u5DE5\u8D44\uFF0C\u5B9E\u529B\u8FD8\u662F\u6709\u7684\uFF0C\u4E0D\u8FC7\u5BF9\u4E8E\u53D1\u5C55\u7684\u524D\u666F\u6765\u8BF4\uFF0C\u9886\u57DF\u8FD9\u4E48\u5782\u76F4\u7684\u516C\u53F8\u98CE\u9669\u6027\u662F\u6BD4\u8F83\u5927\u7684\u3002</p><h3 id="\u4F01\u67E5\u67E5" tabindex="-1"><a class="header-anchor" href="#\u4F01\u67E5\u67E5" aria-hidden="true">#</a> \u4F01\u67E5\u67E5</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/suzhou-d4bcbf1d-f758-4267-b55f-7553d7673511.png" alt=""></p><p>\u8DDF\u4E0A\u9762\u7684\u516C\u53F8\u76F8\u6BD4\uFF0C\u4F01\u67E5\u67E5\u7B97\u662F\u4E00\u4E2A\u5C0F\u800C\u7F8E\u7684\u516C\u53F8\u3002\u4F01\u67E5\u67E5\u662F\u82CF\u5DDE\u7684\u672C\u5730\u4F01\u4E1A\uFF0C\u76EE\u524D\u6765\u8BF4\u53E3\u7891\u8FD8\u662F\u5F88\u4E0D\u9519\u7684\u3002\u76EE\u524D\u4F01\u67E5\u67E5\u7684\u4E1A\u52A1\u5F88\u8D5A\u94B1\uFF0C\u81EA\u5DF1\u7684\u5927\u697C\u4E5F\u5DEE\u4E0D\u591A\u4FEE\u597D\u4E86\u3002\u6CA1\u6709\u5F3A\u5236\u52A0\u73ED\uFF0C\u5168\u989D\u793E\u4FDD\u548C\u516C\u79EF\u91D1\u3002\u6211\u6CA1\u6709\u67E5\u5230\u4F01\u67E5\u67E5\u7684\u6821\u62DB\u85AA\u8D44\uFF0C\u770B boss \u4E0A\u7684\u793E\u62DB\u85AA\u8D44\u6C34\u5E73\u4E0D\u7B97\u592A\u9AD8\uFF0C\u53EA\u80FD\u7B97\u8FD8\u53EF\u4EE5\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/suzhou-c7dbed8d-c471-4969-bfc4-badf8e0ac346.png" alt=""></p><h3 id="\u6536\u94B1\u5427" tabindex="-1"><a class="header-anchor" href="#\u6536\u94B1\u5427" aria-hidden="true">#</a> \u6536\u94B1\u5427</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/suzhou-31051fbc-a573-4328-904b-6915bfba2323.png" alt=""></p><p>\u8FD9\u4E2A\u516C\u53F8\u5927\u5BB6\u5E94\u8BE5\u90FD\u542C\u8BF4\u8FC7\uFF0C\u6BCF\u6B21\u4F60\u7528\u652F\u4ED8\u5B9D\u6216\u8005\u5FAE\u4FE1\u7ED9\u5546\u5BB6\u4ED8\u94B1\u65F6\u90FD\u80FD\u542C\u5230\u201C\u6536\u94B1\u5427\u5230\u8D26xx\u5143\u201D\u3002\u6536\u94B1\u5427\u7684\u6280\u672F\u4E0D\u9519\uFF0C\u52A0\u73ED\u4E5F\u6BD4\u8F83\u5C11\uFF0C\u6536\u94B1\u5427\u7684\u98CE\u8BC4\u4E0D\u9519\u3002\u4E0D\u8FC7\u5C31\u662F\u5DE5\u8D44\u76F8\u5BF9\u7ED9\u7684\u5C11\u70B9\uFF0C\u6708\u85AA 17k \u5DE6\u53F3\uFF08\u5728\u82CF\u5DDE\u4E5F\u8FD8\u884C\u4E86\uFF09\uFF0C\u6BCF\u5E7414 \u4E2A\u6708\u7684\u6708\u85AA\u3002</p><h3 id="\u4E2D\u56FD\u79FB\u52A8\u82CF\u5DDE\u7814\u7A76\u9662" tabindex="-1"><a class="header-anchor" href="#\u4E2D\u56FD\u79FB\u52A8\u82CF\u5DDE\u7814\u7A76\u9662" aria-hidden="true">#</a> \u4E2D\u56FD\u79FB\u52A8\u82CF\u5DDE\u7814\u7A76\u9662</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/suzhou-1bb72f74-dba6-420f-8c37-0a9e621b3561.png" alt=""></p><p>\u4E2D\u56FD\u79FB\u52A8\u82CF\u5DDE\u7814\u7A76\u9662\u53C8\u53EB\u82CF\u5C0F\u7814\uFF0C\u5176\u5B9E\u72B9\u8C6B\u4E86\u5F88\u4E45\u8981\u4E0D\u8981\u628A\u4ED6\u653E\u5728\u63A8\u8350\u91CC\u3002\u82CF\u5C0F\u598D\u5728\u77E5\u4E4E\u4E0A\u7684\u4E89\u8BAE\u5F88\u5927\uFF0C\u6709\u8BF4\u5F85\u9047\u798F\u5229\u5F88\u597D\u7684\uFF0C\u4E5F\u6709\u72C2\u55B7\u7684\u3002\u82CF\u5C0F\u7814\u80AF\u5B9A\u6709\u56FD\u4F01\u7684\u901A\u75C5\uFF0C\u8FD9\u4E2A\u6211\u786E\u8BA4\uFF0C\u4F46\u5177\u4F53\u600E\u4E48\u6837\u5C31\u9760\u5927\u5BB6\u81EA\u5DF1\u5224\u65AD\u4E86\uFF0C\u8D34\u4E24\u5F20\u77E5\u4E4E\u4E0A\u5BF9\u82CF\u5C0F\u7814\u7684\u8BC4\u4EF7\uFF0C\u597D\u574F\u8981\u5927\u5BB6\u81EA\u5DF1\u53BB\u5177\u4F53\u786E\u8BA4\u4E86\u3002\u8FD9\u4E24\u5F20\u56FE\u8BC4\u4EF7\u5B8C\u5168\u662F\u4E24\u4E2A\u6781\u7AEF\u5440\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/suzhou-b616269f-3717-4ea4-8c29-b4d5bcd448b4.png" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/suzhou-76122245-a8e1-44a8-a1f4-8ce7ab3c640d.png" alt=""></p><p>\u4E0A\u9762\u662F\u6211\u8BA4\u4E3A\u82CF\u5DDE\u7684\u6BD4\u8F83\u4E0D\u9519\u7684\u7A0B\u5E8F\u5458\u5C31\u4E1A\u673A\u4F1A\uFF0C\u5176\u5B83\u7684\u4E00\u4E9B\u82CF\u5DDE\u6BD4\u8F83\u6210\u89C4\u6A21\u7684\u63D0\u4F9B\u7A0B\u5E8F\u5458\u5C31\u4E1A\u673A\u4F1A\u7684\u516C\u53F8\u5C31\u5217\u5728\u4E0B\u9762\uFF0C\u5E76\u4E14\u5FEB\u901F\u7684\u7B80\u5355\u4ECB\u7ECD\u4E00\u4E0B\u3002</p><p><strong>\u540C\u7A0B\u827A\u9F99</strong>\uFF1A\u4E4B\u524D\u7B97\u662F\u82CF\u5DDE\u6700\u5927\u7684\u4E92\u8054\u7F51\u516C\u53F8\uFF0C\u4F46\u662F\u76EE\u524D\u5458\u5DE5\u5BF9\u516C\u53F8\u7684\u5410\u69FD\u6BD4\u8F83\u591A\uFF0C\u8BE6\u60C5\u53EF\u4EE5\u5728\u77E5\u4E4E\u548C\u8109\u8109\u4E0A\u641C\u4E0B\u3002</p><p><strong>\u4EAC\u4E1C\u5DE5\u54C1\u6C47</strong>\uFF1A\u5DE5\u54C1\u6C47\u662F\u4E4B\u524D\u82CF\u5DDE\u7684\u4F01\u4E1A\uFF0C\u88AB\u4EAC\u4E1C\u6536\u8D2D\u4E86\uFF0C\u636E\u8BF4\u76EE\u524D\u7B97\u662F\u4EAC\u4E1C\u6BD4\u8F83\u8FB9\u7F18\u7684\u4E1A\u52A1\u90E8\u95E8\u3002</p><p><strong>\u79D1\u5927\u8BAF\u98DE</strong>\uFF1A\u79D1\u5927\u8BAF\u98DE\u5728\u82CF\u5DDE\u662F\u6709\u5C97\u4F4D\u7684\uFF0C\u4E0D\u8FC7\u5C97\u4F4D\u5F88\u5C11\u3002</p><p><strong>\u601D\u5FC5\u9A70</strong>\uFF1A\u548C\u79D1\u5927\u8BAF\u98DE\u4E00\u6837\u505A\u8BED\u97F3\u7684\uFF0C\u4E0D\u8FC7\u73B0\u5728\u7F51\u4E0A\u5BF9\u601D\u5FC5\u9A70\u7684\u8D1F\u9762\u8BC4\u4EF7\u5B69\u633A\u591A</p><p><strong>\u5EFA\u4FE1\u91D1\u79D1\u3001\u4E2D\u94F6\u91D1\u79D1</strong>\uFF1A\u770B\u540D\u5B57\u5C31\u53EF\u4EE5\u770B\u51FA\uFF0C\u8FD9\u4E24\u516C\u53F8\u5C5E\u4E8E\u94F6\u884C\u7684\u5B50\u516C\u53F8\uFF0C\u4E5F\u53EF\u4EE5\u8BF4\u662F\u5916\u5305\u3002\u5927\u5BB6\u8981\u628A\u8FD9\u4E9B\u516C\u53F8\u548C\u94F6\u884C\u7684\u8F6F\u4EF6\u5F00\u53D1\u4E2D\u5FC3\u533A\u5206\u5F00\u6765\u3002\u5176\u5B9E\u94F6\u884C\u7684\u5B50\u516C\u53F8\u7ED9\u4EBA\u7684\u611F\u89C9\u6709\u70B9\u5C34\u5C2C\uFF0C\u5C31\u662F\u5B83\u4EEC\u65E2\u6CA1\u6709\u4E92\u8054\u7F51\u516C\u53F8\u7684\u9AD8\u85AA\uFF0C\u4E5F\u6CA1\u6709\u94F6\u884C\u8F6F\u4EF6\u5F00\u53D1\u4E2D\u5FC3\u76F4\u5C5E\u603B\u884C\u7684\u7A33\u5B9A\u3002\u5F53\u7136\u8FD9\u4E5F\u5C31\u662F\u76F8\u5BF9\u4E8E\u5927\u4E92\u8054\u7F51\u516C\u53F8\u6765\u8BF4\uFF0C\u5982\u679C\u624B\u4E0A\u6CA1\u6709\u4E00\u4E8C\u7EBF\u4E92\u8054\u7F51\u516C\u53F8\u7684 offer\uFF0C\u4E5F\u53EF\u4EE5\u8003\u8651\u53BB\u7684\u3002</p><p><strong>\u9510\u6377</strong>\uFF1A\u8BB8\u591A\u540C\u5B66\u5E94\u8BE5\u542C\u8BF4\u8FC7\u9510\u6377\uFF0C\u4E13\u95E8\u505A\u6821\u56ED\u7F51\u7684\uFF0C\u6BD4\u8F83\u504F\u5E95\u5C42\uFF0C\u5BF9 Linux \u5185\u6838\u611F\u5174\u8DA3\u7684\u53EF\u4EE5\u770B\u770B\u5440\u3002\u85AA\u8D44\u76F8\u5BF9\u8F83\u4F4E\uFF0C\u6821\u62DB\u5F00\u51FA\u7684\u85AA\u8D44\u572813~15k \u8FD9\u4E2A\u533A\u95F4\u3002</p><p><strong>\u91D1\u8776</strong>\uFF1A\u56FD\u5185 ERP \u5DE8\u5934\uFF0C\u5728\u82CF\u5DDE\u8C8C\u4F3C\u5C97\u4F4D\u4E0D\u591A\u3002</p><p><strong>\u79D1\u6C83\u65AF</strong>\uFF1A\u4E3B\u8981\u505A\u667A\u80FD\u786C\u4EF6\u7684\uFF0C\u516C\u53F8\u5F88\u5F3A\uFF0C\u5E02\u503C\u90FD\u4E00\u5343\u591A\u4EBF\u4E86\u3002\u4E5F\u6709\u5F88\u591A\u7F16\u7A0B\u7684\u5C97\u4F4D\u3002\u3002</p><h2 id="\u751F\u6D3B" tabindex="-1"><a class="header-anchor" href="#\u751F\u6D3B" aria-hidden="true">#</a> \u751F\u6D3B</h2><p>\u8BB8\u591A\u4EBA\u60F3\u5728\u82CF\u5DDE\u5B9A\u5C45\uFF0C\u4E5F\u4E3B\u8981\u662F\u89C9\u5F97\u5728\u82CF\u5DDE\u751F\u6D3B\u5F88\u60EC\u610F\u3002\u4E0B\u9762\u8FD8\u662F\u5206\u6559\u80B2\u3001\u623F\u4EF7\u3001\u4EA4\u901A\u3001\u5A31\u4E50\u7B49\u65B9\u9762\u4ECB\u7ECD\u4E0B\u3002</p><h3 id="\u6559\u80B2" tabindex="-1"><a class="header-anchor" href="#\u6559\u80B2" aria-hidden="true">#</a> \u6559\u80B2</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/suzhou-1b300d4a-1384-4dd2-a9a5-98221f1f6c46.png" alt=""></p><p>\u9AD8\u7B49\u6559\u80B2\u65B9\u9762\u3002\u5176\u5B9E\u5C31\u82CF\u5DDE\u672C\u8EAB\u800C\u8A00\uFF0C\u9AD8\u6821\u5E76\u4E0D\u591A\uFF0C\u53EA\u6709\u82CF\u5DDE\u5927\u5B66\u4E00\u6240 211\uFF08\u82CF\u5927\u7684\u81EA\u7136\u8BED\u8A00\u5904\u7406\u633A\u5F3A\u7684\uFF09\u3002\u4F46\u662F\u524D\u4E9B\u5E74\u8BB8\u591A\u5730\u7406\u4F4D\u7F6E\u504F\u5317\u7684\u9AD8\u6821\u4E3A\u4E86\u6253\u9020\u81EA\u5DF1\u5728\u5357\u65B9\u7684\u5F71\u54CD\u529B\uFF0C\u63D0\u9AD8\u751F\u6E90\u8D28\u91CF\uFF0C\u90FD\u4F1A\u9009\u62E9\u5728\u5357\u65B9\u529E\u5B66\u3002\u5176\u4E2D\u4E00\u90E8\u5206\u9009\u62E9\u4E86\u6DF1\u5733\uFF0C\u53E6\u4E00\u90E8\u5206\u9009\u62E9\u4E86\u82CF\u5DDE\u3002\u897F\u4EA4\u5927\u3001\u4E2D\u79D1\u5927\u3001\u4E2D\u56FD\u4EBA\u6C11\u5927\u5B66\u3001\u4E1C\u5357\u5927\u5B66\u3001\u897F\u5DE5\u5927\u7B49\u9662\u6821\u90FD\u5728\u82CF\u5DDE\u8BBE\u6709\u6821\u533A\u3002\u6240\u4EE5\u867D\u7136\u82CF\u5DDE\u672C\u5730\u9662\u6821\u4E0D\u591A\uFF0C\u4F46\u662F\u82CF\u5DDE\u8BA1\u7B97\u673A\u8F6F\u4EF6\u76F8\u5173\u7684\u9AD8\u6821\u6BD5\u4E1A\u751F\u5E76\u4E0D\u5C11\u3002\u4E0D\u8FC7\u8FD9\u79CD\u73B0\u8C61\u968F\u7740\u897F\u5DE5\u5927\u592A\u4ED3\u6821\u533A\u521A\u4FEE\u597D\uFF0C\u5F02\u5730\u529E\u5B66\u5C31\u88AB\u53EB\u505C\u4E86\uFF0C\u6211\u74DC\u5B9E\u60E8~</p><p>\u4E2D\u5C0F\u5B66\u6559\u80B2\u65B9\u9762\uFF0C\u82CF\u5DDE\u7684\u6559\u80B2\u8D28\u91CF\u80AF\u5B9A\u662F\u4E0D\u9519\u7684\uFF0C\u4E0D\u8FC7\u6C5F\u82CF\u7684\u9AD8\u8003\u538B\u529B\u53EF\u4E0D\u5C0F\u3002\u6709\u4E9B\u4EBA\u5B9A\u5C45\u82CF\u5DDE\u4E5F\u4F1A\u62C5\u5FC3\u4E0B\u4E00\u4EE3\u7684\u9AD8\u8003\u95EE\u9898\u3002</p><h3 id="\u623F\u4EF7" tabindex="-1"><a class="header-anchor" href="#\u623F\u4EF7" aria-hidden="true">#</a> \u623F\u4EF7</h3><p>\u76F8\u6BD4\u4E8E\u82CF\u5DDE\u7684\u5DE5\u8D44\u6C34\u5E73\uFF0C\u5176\u5B9E\u82CF\u5DDE\u7684\u623F\u4EF7\u4E5F\u4E0D\u4F4E\u4E86\uFF0C\u770B\u7F51\u7AD9\u4E0A\u7684\u65B0\u623F\u5747\u4EF7\u5927\u7EA6\u4E24\u4E07\u4E94\u4E00\u5E73\u3002\u4F46\u662F\u548C\u65C1\u8FB9\u7684\u57CE\u5E02\u4E00\u6BD4\uFF0C\u90A3\u82CF\u5DDE\u7684\u623F\u4EF7\u5C31\u6BD4\u8F83\u9999\u4E86\u3002\u5728\u82CF\u5DDE\u54AC\u54AC\u7259\u8FD8\u662F\u80FD\u8003\u8651\u4E70\u623F\u7684\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/suzhou-60675498-4bfe-46d2-af70-da2f21add403.png" alt=""></p><h3 id="\u5A31\u4E50-\u4EA4\u901A-\u7F8E\u98DF" tabindex="-1"><a class="header-anchor" href="#\u5A31\u4E50-\u4EA4\u901A-\u7F8E\u98DF" aria-hidden="true">#</a> \u5A31\u4E50&amp;\u4EA4\u901A&amp;\u7F8E\u98DF</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/suzhou-c35c16ca-0bbf-489a-ba0b-9ecb6fef6905.png" alt=""></p><p>\u5A31\u4E50\u65B9\u9762\u82CF\u5DDE\u597D\u73A9\u7684\u5730\u65B9\u5F88\u591A\uFF0C\u4F20\u7EDF\u7684\u82CF\u5DDE\u56ED\u6797\u98CE\u683C\u548C\u82CF\u5DDE\u73B0\u4EE3\u98CE\u683C\u90FD\u8BA9\u4EBA\u5341\u5206\u7559\u604B\u3002\u5468\u672B\u5728\u82CF\u5DDE\u56ED\u6797\u901B\u4E00\u901B\u771F\u7684\u5F88\u60EC\u610F\u3002</p><p>\u4EA4\u901A\u65B9\u9762\u5835\u8F66\u662F\u80AF\u5B9A\u4F1A\u5835\u7684\uFF0C\u8FD8\u6CA1\u89C1\u8FC7\u54EA\u4E2A\u4E8C\u7EBF\u4EE5\u4E0A\u57CE\u5E02\u4E0D\u5835\u8F66\u7684\u3002\u4F46\u662F\u82CF\u5DDE\u7684\u4EA4\u901A\u76F8\u6BD4\u4E8E\u5176\u5B83\u540C\u91CF\u7EA7\u7684\u57CE\u5E02\u8FD8\u662F\u8981\u597D\u5F88\u591A\u3002\u53E6\u5916\u82CF\u5DDE\u5730\u7406\u4F4D\u7F6E\u4E0A\u9760\u8FD1\u4E0A\u6D77\u5357\u4EAC\uFF0C\u51FA\u53BB\u73A9\u4E5F\u5F88\u65B9\u4FBF\u3002</p><p>\u7F8E\u98DF\u65B9\u9762\uFF0C\u82CF\u5E2E\u83DC\u8C8C\u4F3C\u5728\u5168\u56FD\u5E76\u4E0D\u591A\u89C1\uFF0C\u53E3\u5473\u504F\u751C\u3002\u8FD9\u5C31\u4E0D\u77E5\u9053\u5927\u591A\u6570\u5317\u65B9\u4EBA\u80FD\u4E0D\u80FD\u5403\u5F97\u60EF\u4E86~</p><p>\u597D\u4E86\uFF0C\u5C31\u4ECB\u7ECD\u8FD9\u4E48\u591A\uFF0C\u6211\u611F\u89C9\u6211\u8FD8\u771F\u6709\u70B9\u60F3\u7ED9\u82CF\u5DDE\u5FAE\u8F6F\u6295\u7B80\u5386\u53BB\u5DE5\u4F5C\u751F\u6D3B\u4E00\u6BB5\u65F6\u95F4~</p>',50),_=t("\u4F5C\u8005\uFF1A\u5927\u767D\uFF0C\u8F6C\u8F7D\u94FE\u63A5\uFF1A"),v={href:"https://mp.weixin.qq.com/s/cnYsZLudFOwv5EKYMsMh0Q",target:"_blank",rel:"noopener 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diff --git a/dist/assets/suzhou.html.e601b996.js b/dist/assets/suzhou.html.e601b996.js
deleted file mode 100644
index 1a8c85dc..00000000
--- a/dist/assets/suzhou.html.e601b996.js
+++ /dev/null
@@ -1 +0,0 @@
-import{_ as c}from"./plugin-vue_export-helper.21dcd24c.js";import{r as s,o as p,c as n,a as e,b as r,e as o,d as t}from"./app.a0271b9c.js";const h={},d=o('<h1 id="\u60F3\u642C\u53BB\u82CF\u5DDE\u751F\u6D3B\u4E86\u3002\u3002" tabindex="-1"><a class="header-anchor" href="#\u60F3\u642C\u53BB\u82CF\u5DDE\u751F\u6D3B\u4E86\u3002\u3002" aria-hidden="true">#</a> \u60F3\u642C\u53BB\u82CF\u5DDE\u751F\u6D3B\u4E86\u3002\u3002</h1><p>\u5927\u5BB6\u597D\uFF0C\u6211\u662F\u4E8C\u54E5\u5440\uFF01</p><p>\u8001\u8BFB\u8005\u5E94\u8BE5\u90FD\u77E5\u9053\u4E86\uFF0C\u4E8C\u54E5\u7B2C\u4E00\u4EFD\u5DE5\u4F5C\u5C31\u662F\u5728\u82CF\u5DDE\u7684\u4E00\u5BB6\u5916\u4F01\u5EA6\u8FC7\u7684\u3002\u9664\u4E86\u6D1B\u9633\uFF0C\u5C31\u5C5E\u82CF\u5DDE\u751F\u6D3B\u7684\u65F6\u95F4\u6700\u957F\u4E86\uFF0C\u540C\u4E8B nice\u3001\u73AF\u5883 nice\u3001\u8863\u98DF\u4F4F\u884C\u4E5F nice\u3002</p><p>\u521D\u51FA\u8305\u5E90\u7684\u81EA\u5DF1\uFF0C\u66FE\u65E0\u6570\u6B21\u60F3\u8C61\u81EA\u5DF1\u5728\u82CF\u5DDE\u5B89\u5BB6\u7684\u6837\u5B50\uFF0C\u4E70\u4E00\u5957\u5927\u623F\u5B50\uFF0C\u628A\u7236\u6BCD\u4E5F\u63A5\u8FC7\u6765\u4E00\u8D77\u4F4F\uFF0C\u55EF\u3002\u3002</p><p>\u53BB\u5E74\u8FD9\u4E2A\u65F6\u5019\uFF0C\u4E5F\u6709\u8BFB\u8005\u95EE\u6211\u662F\u5728\u82CF\u5DDE\u7684\u54EA\u4E00\u5BB6\u5916\u4F01\uFF0C\u4ED6\u8001\u5BB6\u5C31\u662F\u5728\u82CF\u5DDE\u3002\u3002</p><p>\u8BB2\u771F\uFF0C\u6211\u81F3\u4ECA\u4F9D\u7136\u89C9\u5F97\u5982\u679C\u80FD\u53BB\u82CF\u5DDE\u5DE5\u4F5C\u548C\u751F\u6D3B\u4E5F\u662F\u4E00\u4E2A\u4E0D\u9519\u7684\u9009\u62E9\uFF0C\u6B63\u597D\u4E5F\u5E94\u5927\u5BB6\u7684\u8981\u6C42\uFF0C\u8D81\u7740\u5468\u672B\uFF0C\u4ECA\u5929\u548C\u5927\u5BB6\u4E00\u8D77\u6765\u804A\u4E00\u804A\u82CF\u5DDE\u7684\u4E92\u8054\u7F51\u73AF\u5883\u3002</p><p>\u6709\u53E5\u8BDD\u53EB\u505A\u4E0A\u6709\u5929\u5802\uFF0C\u4E0B\u6709\u82CF\u676D\uFF0C\u4E0D\u8FC7\u6709\u4E00\u8BF4\u4E00\uFF0C\u4E92\u8054\u7F51\u73AF\u5883\u65B9\u9762\u82CF\u5DDE\u548C\u676D\u5DDE\u611F\u89C9\u8FD8\u662F\u6709\u70B9\u5DEE\u8DDD\u3002\u4F46\u662F\u4E2A\u4EBA\u89C9\u5F97\u8FD8\u662F\u4E0D\u9519\u7684\uFF0C\u800C\u4E14\u4ECE 18 \u5E74\u5DE6\u53F3\u5F00\u59CB\uFF0C\u82CF\u5DDE\u7684\u4E92\u8054\u7F51\u73AF\u5883\u5F00\u59CB\u6709\u4E86\u660E\u663E\u7684\u6539\u5584\u3002\u751F\u6D3B\u65B9\u9762\u65E0\u8BBA\u662F\u82CF\u5DDE\u7684\u5730\u7406\u4F4D\u7F6E\uFF0C\u8FD8\u662F\u4EBA\u6587\u73AF\u5883\uFF0C\u90FD\u662F\u5341\u5206\u9002\u5408\u5C45\u4F4F\u751F\u6D3B\u7684\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/suzhou-e780c8c6-6e3f-4ba0-a91b-5cf572ee2d54.png" alt=""></p><p>\u8001\u89C4\u77E9\uFF0C\u4E0B\u9762\u6211\u4EEC\u8FD8\u662F\u6309\u7167\u7A0B\u5E8F\u5458\u7684\u5DE5\u4F5C\u673A\u4F1A\u548C\u751F\u6D3B\u73AF\u5883\u6765\u4ECB\u7ECD\u82CF\u5DDE\u3002</p><p>\u56E0\u4E3A\u82CF\u5DDE\u76EE\u524D\u53EF\u4F9B\u7A0B\u5E8F\u5458\u9009\u62E9\u7684\u597D\u7684\u5C31\u4E1A\u673A\u4F1A\u8FD8\u662F\u4E0D\u50CF\u5317\u4E0A\u5E7F\u6DF1\u7B49\u5730\u90A3\u4E48\u591A\uFF0C\u6211\u5C31\u4E0D\u628A\u82CF\u5DDE\u7684\u5DE5\u4F5C\u673A\u4F1A\u5206\u4E92\u8054\u7F51\u3001\u56FD\u4F01\u3001\u5916\u4F01\u7B49\u4ECB\u7ECD\u4E86\u3002\u6211\u628A\u6BD4\u8F83\u4E0D\u9519\u7684\u5DE5\u4F5C\u673A\u4F1A\u76F4\u63A5\u6DF7\u5728\u4E00\u8D77\u8BE6\u7EC6\u4ECB\u7ECD\u4E0B\uFF0C\u7136\u540E\u5176\u5B83\u6211\u77E5\u9053\u7684\u5DE5\u4F5C\u673A\u4F1A\u5C31\u5728\u6700\u540E\u5217\u4E00\u4E0B\u4E86\u3002</p><h2 id="\u5DE5\u4F5C\u673A\u4F1A" tabindex="-1"><a class="header-anchor" href="#\u5DE5\u4F5C\u673A\u4F1A" aria-hidden="true">#</a> \u5DE5\u4F5C\u673A\u4F1A</h2><h3 id="\u5FAE\u8F6F" tabindex="-1"><a class="header-anchor" href="#\u5FAE\u8F6F" aria-hidden="true">#</a> \u5FAE\u8F6F</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/suzhou-e18a11b0-2667-4e27-b93f-a05dad122e76.png" alt=""></p><p>\u5FAE\u8F6F\u53EF\u4EE5\u8BF4\u662F\u7A0B\u5E8F\u5458\u5728\u82CF\u5DDE\u6700\u597D\u7684\u5DE5\u4F5C\u673A\u4F1A\u4E86\u3002\u5FAE\u8F6F\u8FD1\u4E9B\u5E74\u4E5F\u4E00\u76F4\u6269\u5927\u5728\u82CF\u5DDE\u7684\u6295\u8D44\u529B\u5EA6\uFF0C\u76EE\u524D\u5FAE\u8F6F\u82CF\u5DDE\u7814\u7A76\u9662\u7684\u7814\u53D1\u56E2\u961F\u5DF2\u7ECF\u6709 2000 \u4EBA\u5DE6\u53F3\u4E86\uFF0C\u5E76\u4E14\u8FD8\u5728\u8FD1\u4E00\u6B65\u6269\u5EFA\u30022022 \u5E74\u5FAE\u8F6F\u5C06\u542F\u52A8\u5FAE\u8F6F\u82CF\u5DDE\u4E09\u671F\u65B0\u5927\u697C\u7684\u5EFA\u8BBE\uFF0C\u5EFA\u6210\u540E\u9884\u8BA1\u5FAE\u8F6F\u5728\u82CF\u5DDE\u7684\u7814\u53D1\u56E2\u961F\u4F1A\u8FBE\u52305000\u4EBA\u3002\u6240\u4EE5\uFF0C\u76EE\u524D\u60F3\u62FF\u5FAE\u8F6F\u82CF\u5DDE\u7684 offer \u7684\u96BE\u5EA6\uFF0C\u76F8\u6BD4\u4E8E\u62FF\u5317\u4EAC\u4E0A\u6D77\u7B49\u5176\u5B83\u51E0\u4E2A\u5DE5\u4F5C\u5730 offer \u7684\u96BE\u5EA6\u4F1A\u4F4E\u4E00\u4E9B\uFF0C\u5927\u5BB6\u6293\u7D27\u5440\u3002</p><p>\u8BB8\u591A\u4EBA\u5BF9\u5FAE\u8F6F\u7684\u5370\u8C61\u5C31\u662F\u517B\u751F\uFF0C\u4F46\u662F\u6211\u95EE\u4E86\u4E00\u4E9B\u5FAE\u8F6F\u7684\u804C\u5DE5\u540E\u53D1\u73B0\u8FD8\u662F\u8981\u770B\u7EC4\uFF0C\u5728\u5FAE\u8F6F\u5929\u5929\u5E72\u5230 9 \u70B9\u591A\u624D\u80FD\u4E0B\u73ED\u7684\u7EC4\u4E5F\u662F\u6709\u7684\uFF0C\u4E0D\u8FC7\u5927\u90E8\u5206\u7EC4\u517B\u751F\u8D77\u6765\u662F\u771F\u517B\u751F\uFF0C\u652F\u6301\u5C45\u5BB6\u529E\u516C\u8FD9\u79CD\u5DE5\u4F5C\u65B9\u5F0F\u662F\u771F\u7684\u723D\u3002</p><p>\u5FAE\u8F6F\u7684\u85AA\u8D44\u76F8\u5BF9\u4E8E\u56FD\u5185\u7684\u4E92\u8054\u7F51\u5927\u5382\u6765\u8BF4\u4F1A\u4F4E\u4E00\u4E9B\u3002\u82CF\u5DDE\u5FAE\u8F6F\u4ECA\u5E74\u6821\u62DB\u5F00\u51FA\u7684 offer \u662F\u767D\u83DC\u4EF7\u5E74\u85AA 29 \u4E07\u5DE6\u53F3\uFF0826\u4E07 base + 10%\u7684\u5E74\u7EC8\u5956\uFF09\uFF0CSpecial offer \u5E74\u85AA\u662F 31\u4E07\u5DE6\u53F3\uFF0828\u4E07 base + 10% \u5E74\u7EC8\u5956\uFF09\u3002\u989D\u5916\u7B7E\u5B57\u8D39\u52A0\u642C\u5BB6\u8D39\u4E00\u6B21\u6027\u53D1\u653E 6 \u4E07\u5143\uFF0C4.5 \u4E07\u5143\u7684\u80A1\u7968\u5206 4 \u5E74\u53D1\u653E\u3002\u5728\u6821\u62DB\u85AA\u6C34\u4E0A\u4E5F\u770B\u5230\u4E00\u4E2A 2 \u5E74\u7ECF\u9A8C\u7684\u8001\u54E5\u7206\u6599\u81EA\u5DF1\u62FF\u5230\u7684\u82CF\u5DDE\u5FAE\u8F6F 61 \u7EA7 offer \u85AA\u8D44\uFF0C\u5E74\u85AA 35 \u4E07\u5DE6\u53F3\uFF0832\u4E07 base + 10%\u7684\u5E74\u7EC8\u5956\uFF09\uFF0C\u989D\u5916\u7B7E\u5B57\u8D39\u52A0\u642C\u5BB6\u8D39\u4E00\u6B21\u6027\u53D1\u653E 5 \u4E07\u5143\uFF0C8\u4E07\u7F8E\u5143\u7684\u80A1\u7968\u52064\u5E74\u53D1\u653E\uFF0C\u8FD8\u6709\u6BCF\u5E747200\u5143\u7684\u9910\u8865\uFF0C\u5065\u8EAB\u8865\u8D34\u6BCF\u5E74 1800 \u5143\u3002</p>',16),i=t("\u6211\u6709\u70B9\u6309\u637A\u4E0D\u4F4F\u60F3\u7ED9\u82CF\u5DDE\u5FAE\u8F6F\u6295\u7B80\u5386\u4E86\u3002\u5FAE\u8F6F\u6821\u62DB\u9762\u8BD5\u5BF9\u4E8E\u624B\u6495\u4EE3\u7801\u7684\u8003\u5BDF\u662F\u5F88\u4E25\u683C\u7684\uFF0C\u5982\u679C\u60F3\u8981\u53BB\u5FAE\u8F6F\u7684\u4E00\u5B9A\u8981\u591A\u5237\u4EE3\u7801\u9898\u3002\u5982\u679C\u4F60\u8D70\u793E\u62DB\u8FDB\u5FAE\u8F6F\u7684\u8BDD\uFF0C\u4E0D\u6B62\u662F\u8981\u5237\u597D\u9898\uFF0C\u8FD8\u8981\u591A\u51C6\u5907\u7CFB\u7EDF\u8BBE\u8BA1\u7684\u76F8\u5173\u77E5\u8BC6\uFF0C\u8FD9\u4E2A\u4E5F\u662F\u53EF\u4EE5\u9488\u5BF9\u6027\u51C6\u5907\u7684\uFF0C\u53EF\u4EE5\u770B\u6211\u8FD9\u7BC7\u6587\u7AE0--"),b={href:"https://mp.weixin.qq.com/s/Thd7AsuPq1c0Wgog-Ku0Bg",target:"_blank",rel:"noopener noreferrer"},m=t("\u5927\u578B\u7CFB\u7EDF\u8BBE\u8BA1\u65B9\u6848"),g=t("\uFF0C\u53E6\u5916\u5982\u679C\u60F3\u51C6\u5907\u9762\u8BD5\u5E38\u95EE\u516B\u80A1\u6587\uFF0C\u4E5F\u53EF\u4EE5\u770B\u8FD9\u91CC-"),l={href:"https://mp.weixin.qq.com/s/1gXVd_6BEmaocu1NA4YToQ",target:"_blank",rel:"noopener noreferrer"},f=t("\u516B\u80A1\u6587\u5408\u96C6"),u=o('<h3 id="zoom" tabindex="-1"><a class="header-anchor" href="#zoom" aria-hidden="true">#</a> ZOOM</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/suzhou-ce9a78ef-6a18-4adf-8a4f-de7b7fa34b45.png" alt=""></p><p>\u5728\u82CF\u5DDE\uFF0CZoom\u662F\u9664\u5FAE\u8F6F\u5916\u7684\u53E6\u4E00\u4E2A\u597D\u9009\u62E9\u3002Zoom \u66FE\u7ECF\u88AB\u8BC4\u4E3A\u5168\u7403\u6700\u4F73\u96C7\u4E3B\u3002\u6839\u636E zoom \u5458\u5DE5\u7684\u8BF4\u6CD5\uFF0Czoom\u7684\u6280\u672F\u6C34\u5E73\u5927\u6982\u548C\u56FD\u5185\u4E8C\u4E09\u7EBF\u5382\u7684\u6C34\u5E73\u5DEE\u4E0D\u591A\u3002\u85AA\u8D44\u65B9\u9762\uFF0C\u6BD4\u56FD\u5185\u4E92\u8054\u7F51\u4E5F\u8981\u4F4E\u4E00\u4E9B\uFF0C\u770B\u5230\u4E00\u4E2A\u6821\u62DB\u85AA\u8D44\u7684\u7206\u6599\uFF0C\u4E00\u4E2A\u505A\u524D\u7AEF\u7684\u7855\u58EB\u5728\u82CF\u5DDEzoom\u7684\u85AA\u8D44\u662F17k * 14\u3002\u989D\u5916\u6709 7 \u4E07\u7F8E\u5143\u7684\u80A1\u7968\uFF0C\u5206 4 \u5E74\u53D1\u5B8C\u3002\u867D\u7136 base \u85AA\u8D44\u65B9\u9762\u76F8\u5BF9\u4F4E\u4E00\u4E9B\uFF0C\u4F46\u662F zoom \u5DE5\u4F5C\u662F\u771F\u7684\u723D\u5440\uFF0C\u6CA1\u6709 996\uFF0C\u6CA1\u6709 kpi\uFF0C\u529E\u516C\u73AF\u5883\u597D\uFF0C\u65E0\u9650\u96F6\u98DF\u548C\u6C34\u679C\u4F9B\u5E94\uFF0C\u8FD9\u8FD8\u8981\u5565\u81EA\u884C\u8F66\u3002</p><h3 id="\u534E\u4E3A" tabindex="-1"><a class="header-anchor" href="#\u534E\u4E3A" aria-hidden="true">#</a> \u534E\u4E3A</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/suzhou-8bd7e5d1-1984-43f7-84e1-b02141160a37.png" alt=""></p><p>\u534E\u4E3A\u5728\u82CF\u5DDE\u7684\u7814\u7A76\u9662\u8BBE\u7ACB\u65F6\u95F4\u4E0D\u957F\u3002\u534E\u4E3A\u7684\u82CF\u7814\u9662\u7684\u52A0\u73ED\u5728\u5404\u5730\u6240\u6709\u7684\u7814\u53D1\u4E2D\u5FC3\u4E2D\u662F\u6392\u7684\u4E0A\u53F7\u7684\u3002\u534E\u4E3A\u5404\u5730\u7814\u53D1\u4E2D\u5FC3\u7684\u5FD9\u788C\u7A0B\u5EA6\u5DEE\u4E0D\u591A\u662F\u6210\u90FD \u300B= \u897F\u5B89 \u300B= \u82CF\u5DDE &gt; \u6B66\u6C49 &gt; \u4E1C\u839E &gt; \u676D\u5DDE &gt; \u5357\u4EAC &gt; \u6DF1\u5733 &gt; \u5317\u4EAC &gt; \u4E0A\u6D77\uFF08\u6574\u4F53\u611F\u89C9\u662F\u8FD9\u6837\uFF0C\u6BCF\u4E2A\u7814\u53D1\u4E2D\u5FC3\u5404\u90E8\u95E8\u7684\u52A0\u73ED\u60C5\u51B5\u4E5F\u4E0D\u540C\uFF09\u3002\u4E0D\u8FC7\u534E\u4E3A\u6709\u4E00\u4E2A\u597D\u5904\u5C31\u662F\u4F60\u6323\u7684\u94B1\u80FD\u548C\u4F60\u7684\u4ED8\u51FA\u6210\u6B63\u6BD4\uFF0C\u6240\u4EE5\u60F3\u5FEB\u901F\u6323\u94B1\u7684\u8FD8\u662F\u5EFA\u8BAE\u53BB\u3002</p><h3 id="_360" tabindex="-1"><a class="header-anchor" href="#_360" aria-hidden="true">#</a> 360</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/suzhou-85547b36-15da-443f-b7f2-878bfd06e997.png" alt=""></p><p>360 \u6765\u82CF\u5DDE\u65F6\u95F4\u4E0D\u957F\uFF0C2018\u5E74\u624D\u9010\u6E10\u5F00\u59CB\u5728\u82CF\u5DDE\u8BBE\u7ACB\u5F00\u53D1\u90E8\u95E8\u3002\u76EE\u524D 360 \u82CF\u5DDE\u5305\u542B\u4E86\u672A\u6765\u5B89\u5168\u7814\u7A76\u3001360\u653F\u4F01\u3001\u5B89\u5168\u7B49\u90E8\u95E8\u3002\u76EE\u524D 360\u82CF\u5DDE\u7684\u85AA\u8D44\u6C34\u5E73\u662F\u5317\u4EAC\u4E0A\u6D77\u85AA\u8D44\u6C34\u5E73\u7684 8 \u6298\uFF0C\u770B\u5230 21 \u5E74\u6BD5\u4E1A\u7684\u4E00\u4E2A\u5E94\u5C4A\u7855\u58EB\u7206\u6599\u6708\u85AA\u662F 16k\uFF0C\u5DE5\u8D44\u6709\u70B9\u5C11\uFF0C\u4E0D\u8FC7\u611F\u89C9\u5728\u82CF\u5DDE\u4E5F\u4E0D\u9519\u5440\u3002</p><h3 id="momenta" tabindex="-1"><a class="header-anchor" href="#momenta" aria-hidden="true">#</a> Momenta</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/suzhou-c4c83915-04b5-4660-9bad-32989a65116d.png" alt=""></p><p>\u4E00\u5F00\u59CB\u6211\u5BF9 Momenta \u8FD8\u771F\u6CA1\u4EC0\u4E48\u4E86\u89E3\uFF0C\u76F4\u5230\u6211\u6709\u4E00\u5929\u7A81\u7136\u5728\u6821\u62DB\u85AA\u6C34\u4E0A\u641C\u4E86\u4E0B Momenta\uFF0C\u7136\u540E\u6211\u4E0D\u7531\u5F97\u76F4\u547C\u5367\u69FD\uFF0C\u8FD9\u7279\u4E48\u662F\u7ED9\u5E94\u5C4A\u751F\u7684\u85AA\u8D44\uFF1F\u8BA4\u771F\u7684\uFF1F</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/suzhou-ff400245-2fe0-437e-8dd3-aa9eed650e99.png" alt=""></p><p>\u7136\u540E\u6211\u8BE6\u7EC6\u7684\u4E86\u89E3\u4E86\u4E0B\u8FD9\u5BB6\u516C\u53F8\uFF0C\u8FD9\u662F\u4E00\u5BB6\u505A\u81EA\u52A8\u9A7E\u9A76\u7684\u516C\u53F8\uFF0C\u521B\u7ACB\u65F6\u95F4\u4E5F\u4E0D\u957F\uFF0C2016\u5E74\u521B\u7ACB\u7684\u3002\u4E0D\u8FC7\u636E\u8BF4\u8FD9\u5BB6\u516C\u53F8\u52A0\u73ED\u7279\u522B\u731B\uFF0C\u6709\u7684\u7EC4 10 10 5\uFF0C\u6709\u7684\u7EC4 996\uFF0C\u6709\u7684\u7EC4\u6BD4 996 \u8FD8\u8981\u7D2F\u3002Momenta \u73B0\u5728\u80FD\u7ED9\u7684\u8D77\u8FD9\u4E48\u9AD8\u7684\u5DE5\u8D44\uFF0C\u5B9E\u529B\u8FD8\u662F\u6709\u7684\uFF0C\u4E0D\u8FC7\u5BF9\u4E8E\u53D1\u5C55\u7684\u524D\u666F\u6765\u8BF4\uFF0C\u9886\u57DF\u8FD9\u4E48\u5782\u76F4\u7684\u516C\u53F8\u98CE\u9669\u6027\u662F\u6BD4\u8F83\u5927\u7684\u3002</p><h3 id="\u4F01\u67E5\u67E5" tabindex="-1"><a class="header-anchor" href="#\u4F01\u67E5\u67E5" aria-hidden="true">#</a> \u4F01\u67E5\u67E5</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/suzhou-d4bcbf1d-f758-4267-b55f-7553d7673511.png" alt=""></p><p>\u8DDF\u4E0A\u9762\u7684\u516C\u53F8\u76F8\u6BD4\uFF0C\u4F01\u67E5\u67E5\u7B97\u662F\u4E00\u4E2A\u5C0F\u800C\u7F8E\u7684\u516C\u53F8\u3002\u4F01\u67E5\u67E5\u662F\u82CF\u5DDE\u7684\u672C\u5730\u4F01\u4E1A\uFF0C\u76EE\u524D\u6765\u8BF4\u53E3\u7891\u8FD8\u662F\u5F88\u4E0D\u9519\u7684\u3002\u76EE\u524D\u4F01\u67E5\u67E5\u7684\u4E1A\u52A1\u5F88\u8D5A\u94B1\uFF0C\u81EA\u5DF1\u7684\u5927\u697C\u4E5F\u5DEE\u4E0D\u591A\u4FEE\u597D\u4E86\u3002\u6CA1\u6709\u5F3A\u5236\u52A0\u73ED\uFF0C\u5168\u989D\u793E\u4FDD\u548C\u516C\u79EF\u91D1\u3002\u6211\u6CA1\u6709\u67E5\u5230\u4F01\u67E5\u67E5\u7684\u6821\u62DB\u85AA\u8D44\uFF0C\u770B boss \u4E0A\u7684\u793E\u62DB\u85AA\u8D44\u6C34\u5E73\u4E0D\u7B97\u592A\u9AD8\uFF0C\u53EA\u80FD\u7B97\u8FD8\u53EF\u4EE5\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/suzhou-c7dbed8d-c471-4969-bfc4-badf8e0ac346.png" alt=""></p><h3 id="\u6536\u94B1\u5427" tabindex="-1"><a class="header-anchor" href="#\u6536\u94B1\u5427" aria-hidden="true">#</a> \u6536\u94B1\u5427</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/suzhou-31051fbc-a573-4328-904b-6915bfba2323.png" alt=""></p><p>\u8FD9\u4E2A\u516C\u53F8\u5927\u5BB6\u5E94\u8BE5\u90FD\u542C\u8BF4\u8FC7\uFF0C\u6BCF\u6B21\u4F60\u7528\u652F\u4ED8\u5B9D\u6216\u8005\u5FAE\u4FE1\u7ED9\u5546\u5BB6\u4ED8\u94B1\u65F6\u90FD\u80FD\u542C\u5230\u201C\u6536\u94B1\u5427\u5230\u8D26xx\u5143\u201D\u3002\u6536\u94B1\u5427\u7684\u6280\u672F\u4E0D\u9519\uFF0C\u52A0\u73ED\u4E5F\u6BD4\u8F83\u5C11\uFF0C\u6536\u94B1\u5427\u7684\u98CE\u8BC4\u4E0D\u9519\u3002\u4E0D\u8FC7\u5C31\u662F\u5DE5\u8D44\u76F8\u5BF9\u7ED9\u7684\u5C11\u70B9\uFF0C\u6708\u85AA 17k \u5DE6\u53F3\uFF08\u5728\u82CF\u5DDE\u4E5F\u8FD8\u884C\u4E86\uFF09\uFF0C\u6BCF\u5E7414 \u4E2A\u6708\u7684\u6708\u85AA\u3002</p><h3 id="\u4E2D\u56FD\u79FB\u52A8\u82CF\u5DDE\u7814\u7A76\u9662" tabindex="-1"><a class="header-anchor" href="#\u4E2D\u56FD\u79FB\u52A8\u82CF\u5DDE\u7814\u7A76\u9662" aria-hidden="true">#</a> \u4E2D\u56FD\u79FB\u52A8\u82CF\u5DDE\u7814\u7A76\u9662</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/suzhou-1bb72f74-dba6-420f-8c37-0a9e621b3561.png" alt=""></p><p>\u4E2D\u56FD\u79FB\u52A8\u82CF\u5DDE\u7814\u7A76\u9662\u53C8\u53EB\u82CF\u5C0F\u7814\uFF0C\u5176\u5B9E\u72B9\u8C6B\u4E86\u5F88\u4E45\u8981\u4E0D\u8981\u628A\u4ED6\u653E\u5728\u63A8\u8350\u91CC\u3002\u82CF\u5C0F\u598D\u5728\u77E5\u4E4E\u4E0A\u7684\u4E89\u8BAE\u5F88\u5927\uFF0C\u6709\u8BF4\u5F85\u9047\u798F\u5229\u5F88\u597D\u7684\uFF0C\u4E5F\u6709\u72C2\u55B7\u7684\u3002\u82CF\u5C0F\u7814\u80AF\u5B9A\u6709\u56FD\u4F01\u7684\u901A\u75C5\uFF0C\u8FD9\u4E2A\u6211\u786E\u8BA4\uFF0C\u4F46\u5177\u4F53\u600E\u4E48\u6837\u5C31\u9760\u5927\u5BB6\u81EA\u5DF1\u5224\u65AD\u4E86\uFF0C\u8D34\u4E24\u5F20\u77E5\u4E4E\u4E0A\u5BF9\u82CF\u5C0F\u7814\u7684\u8BC4\u4EF7\uFF0C\u597D\u574F\u8981\u5927\u5BB6\u81EA\u5DF1\u53BB\u5177\u4F53\u786E\u8BA4\u4E86\u3002\u8FD9\u4E24\u5F20\u56FE\u8BC4\u4EF7\u5B8C\u5168\u662F\u4E24\u4E2A\u6781\u7AEF\u5440\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/suzhou-b616269f-3717-4ea4-8c29-b4d5bcd448b4.png" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/suzhou-76122245-a8e1-44a8-a1f4-8ce7ab3c640d.png" alt=""></p><p>\u4E0A\u9762\u662F\u6211\u8BA4\u4E3A\u82CF\u5DDE\u7684\u6BD4\u8F83\u4E0D\u9519\u7684\u7A0B\u5E8F\u5458\u5C31\u4E1A\u673A\u4F1A\uFF0C\u5176\u5B83\u7684\u4E00\u4E9B\u82CF\u5DDE\u6BD4\u8F83\u6210\u89C4\u6A21\u7684\u63D0\u4F9B\u7A0B\u5E8F\u5458\u5C31\u4E1A\u673A\u4F1A\u7684\u516C\u53F8\u5C31\u5217\u5728\u4E0B\u9762\uFF0C\u5E76\u4E14\u5FEB\u901F\u7684\u7B80\u5355\u4ECB\u7ECD\u4E00\u4E0B\u3002</p><p><strong>\u540C\u7A0B\u827A\u9F99</strong>\uFF1A\u4E4B\u524D\u7B97\u662F\u82CF\u5DDE\u6700\u5927\u7684\u4E92\u8054\u7F51\u516C\u53F8\uFF0C\u4F46\u662F\u76EE\u524D\u5458\u5DE5\u5BF9\u516C\u53F8\u7684\u5410\u69FD\u6BD4\u8F83\u591A\uFF0C\u8BE6\u60C5\u53EF\u4EE5\u5728\u77E5\u4E4E\u548C\u8109\u8109\u4E0A\u641C\u4E0B\u3002</p><p><strong>\u4EAC\u4E1C\u5DE5\u54C1\u6C47</strong>\uFF1A\u5DE5\u54C1\u6C47\u662F\u4E4B\u524D\u82CF\u5DDE\u7684\u4F01\u4E1A\uFF0C\u88AB\u4EAC\u4E1C\u6536\u8D2D\u4E86\uFF0C\u636E\u8BF4\u76EE\u524D\u7B97\u662F\u4EAC\u4E1C\u6BD4\u8F83\u8FB9\u7F18\u7684\u4E1A\u52A1\u90E8\u95E8\u3002</p><p><strong>\u79D1\u5927\u8BAF\u98DE</strong>\uFF1A\u79D1\u5927\u8BAF\u98DE\u5728\u82CF\u5DDE\u662F\u6709\u5C97\u4F4D\u7684\uFF0C\u4E0D\u8FC7\u5C97\u4F4D\u5F88\u5C11\u3002</p><p><strong>\u601D\u5FC5\u9A70</strong>\uFF1A\u548C\u79D1\u5927\u8BAF\u98DE\u4E00\u6837\u505A\u8BED\u97F3\u7684\uFF0C\u4E0D\u8FC7\u73B0\u5728\u7F51\u4E0A\u5BF9\u601D\u5FC5\u9A70\u7684\u8D1F\u9762\u8BC4\u4EF7\u5B69\u633A\u591A</p><p><strong>\u5EFA\u4FE1\u91D1\u79D1\u3001\u4E2D\u94F6\u91D1\u79D1</strong>\uFF1A\u770B\u540D\u5B57\u5C31\u53EF\u4EE5\u770B\u51FA\uFF0C\u8FD9\u4E24\u516C\u53F8\u5C5E\u4E8E\u94F6\u884C\u7684\u5B50\u516C\u53F8\uFF0C\u4E5F\u53EF\u4EE5\u8BF4\u662F\u5916\u5305\u3002\u5927\u5BB6\u8981\u628A\u8FD9\u4E9B\u516C\u53F8\u548C\u94F6\u884C\u7684\u8F6F\u4EF6\u5F00\u53D1\u4E2D\u5FC3\u533A\u5206\u5F00\u6765\u3002\u5176\u5B9E\u94F6\u884C\u7684\u5B50\u516C\u53F8\u7ED9\u4EBA\u7684\u611F\u89C9\u6709\u70B9\u5C34\u5C2C\uFF0C\u5C31\u662F\u5B83\u4EEC\u65E2\u6CA1\u6709\u4E92\u8054\u7F51\u516C\u53F8\u7684\u9AD8\u85AA\uFF0C\u4E5F\u6CA1\u6709\u94F6\u884C\u8F6F\u4EF6\u5F00\u53D1\u4E2D\u5FC3\u76F4\u5C5E\u603B\u884C\u7684\u7A33\u5B9A\u3002\u5F53\u7136\u8FD9\u4E5F\u5C31\u662F\u76F8\u5BF9\u4E8E\u5927\u4E92\u8054\u7F51\u516C\u53F8\u6765\u8BF4\uFF0C\u5982\u679C\u624B\u4E0A\u6CA1\u6709\u4E00\u4E8C\u7EBF\u4E92\u8054\u7F51\u516C\u53F8\u7684 offer\uFF0C\u4E5F\u53EF\u4EE5\u8003\u8651\u53BB\u7684\u3002</p><p><strong>\u9510\u6377</strong>\uFF1A\u8BB8\u591A\u540C\u5B66\u5E94\u8BE5\u542C\u8BF4\u8FC7\u9510\u6377\uFF0C\u4E13\u95E8\u505A\u6821\u56ED\u7F51\u7684\uFF0C\u6BD4\u8F83\u504F\u5E95\u5C42\uFF0C\u5BF9 Linux \u5185\u6838\u611F\u5174\u8DA3\u7684\u53EF\u4EE5\u770B\u770B\u5440\u3002\u85AA\u8D44\u76F8\u5BF9\u8F83\u4F4E\uFF0C\u6821\u62DB\u5F00\u51FA\u7684\u85AA\u8D44\u572813~15k \u8FD9\u4E2A\u533A\u95F4\u3002</p><p><strong>\u91D1\u8776</strong>\uFF1A\u56FD\u5185 ERP \u5DE8\u5934\uFF0C\u5728\u82CF\u5DDE\u8C8C\u4F3C\u5C97\u4F4D\u4E0D\u591A\u3002</p><p><strong>\u79D1\u6C83\u65AF</strong>\uFF1A\u4E3B\u8981\u505A\u667A\u80FD\u786C\u4EF6\u7684\uFF0C\u516C\u53F8\u5F88\u5F3A\uFF0C\u5E02\u503C\u90FD\u4E00\u5343\u591A\u4EBF\u4E86\u3002\u4E5F\u6709\u5F88\u591A\u7F16\u7A0B\u7684\u5C97\u4F4D\u3002\u3002</p><h2 id="\u751F\u6D3B" tabindex="-1"><a class="header-anchor" href="#\u751F\u6D3B" aria-hidden="true">#</a> \u751F\u6D3B</h2><p>\u8BB8\u591A\u4EBA\u60F3\u5728\u82CF\u5DDE\u5B9A\u5C45\uFF0C\u4E5F\u4E3B\u8981\u662F\u89C9\u5F97\u5728\u82CF\u5DDE\u751F\u6D3B\u5F88\u60EC\u610F\u3002\u4E0B\u9762\u8FD8\u662F\u5206\u6559\u80B2\u3001\u623F\u4EF7\u3001\u4EA4\u901A\u3001\u5A31\u4E50\u7B49\u65B9\u9762\u4ECB\u7ECD\u4E0B\u3002</p><h3 id="\u6559\u80B2" tabindex="-1"><a class="header-anchor" href="#\u6559\u80B2" aria-hidden="true">#</a> \u6559\u80B2</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/suzhou-1b300d4a-1384-4dd2-a9a5-98221f1f6c46.png" alt=""></p><p>\u9AD8\u7B49\u6559\u80B2\u65B9\u9762\u3002\u5176\u5B9E\u5C31\u82CF\u5DDE\u672C\u8EAB\u800C\u8A00\uFF0C\u9AD8\u6821\u5E76\u4E0D\u591A\uFF0C\u53EA\u6709\u82CF\u5DDE\u5927\u5B66\u4E00\u6240 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id="\u623F\u4EF7" tabindex="-1"><a class="header-anchor" href="#\u623F\u4EF7" aria-hidden="true">#</a> \u623F\u4EF7</h3><p>\u76F8\u6BD4\u4E8E\u82CF\u5DDE\u7684\u5DE5\u8D44\u6C34\u5E73\uFF0C\u5176\u5B9E\u82CF\u5DDE\u7684\u623F\u4EF7\u4E5F\u4E0D\u4F4E\u4E86\uFF0C\u770B\u7F51\u7AD9\u4E0A\u7684\u65B0\u623F\u5747\u4EF7\u5927\u7EA6\u4E24\u4E07\u4E94\u4E00\u5E73\u3002\u4F46\u662F\u548C\u65C1\u8FB9\u7684\u57CE\u5E02\u4E00\u6BD4\uFF0C\u90A3\u82CF\u5DDE\u7684\u623F\u4EF7\u5C31\u6BD4\u8F83\u9999\u4E86\u3002\u5728\u82CF\u5DDE\u54AC\u54AC\u7259\u8FD8\u662F\u80FD\u8003\u8651\u4E70\u623F\u7684\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/suzhou-60675498-4bfe-46d2-af70-da2f21add403.png" alt=""></p><h3 id="\u5A31\u4E50-\u4EA4\u901A-\u7F8E\u98DF" tabindex="-1"><a class="header-anchor" href="#\u5A31\u4E50-\u4EA4\u901A-\u7F8E\u98DF" aria-hidden="true">#</a> \u5A31\u4E50&amp;\u4EA4\u901A&amp;\u7F8E\u98DF</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/suzhou-c35c16ca-0bbf-489a-ba0b-9ecb6fef6905.png" alt=""></p><p>\u5A31\u4E50\u65B9\u9762\u82CF\u5DDE\u597D\u73A9\u7684\u5730\u65B9\u5F88\u591A\uFF0C\u4F20\u7EDF\u7684\u82CF\u5DDE\u56ED\u6797\u98CE\u683C\u548C\u82CF\u5DDE\u73B0\u4EE3\u98CE\u683C\u90FD\u8BA9\u4EBA\u5341\u5206\u7559\u604B\u3002\u5468\u672B\u5728\u82CF\u5DDE\u56ED\u6797\u901B\u4E00\u901B\u771F\u7684\u5F88\u60EC\u610F\u3002</p><p>\u4EA4\u901A\u65B9\u9762\u5835\u8F66\u662F\u80AF\u5B9A\u4F1A\u5835\u7684\uFF0C\u8FD8\u6CA1\u89C1\u8FC7\u54EA\u4E2A\u4E8C\u7EBF\u4EE5\u4E0A\u57CE\u5E02\u4E0D\u5835\u8F66\u7684\u3002\u4F46\u662F\u82CF\u5DDE\u7684\u4EA4\u901A\u76F8\u6BD4\u4E8E\u5176\u5B83\u540C\u91CF\u7EA7\u7684\u57CE\u5E02\u8FD8\u662F\u8981\u597D\u5F88\u591A\u3002\u53E6\u5916\u82CF\u5DDE\u5730\u7406\u4F4D\u7F6E\u4E0A\u9760\u8FD1\u4E0A\u6D77\u5357\u4EAC\uFF0C\u51FA\u53BB\u73A9\u4E5F\u5F88\u65B9\u4FBF\u3002</p><p>\u7F8E\u98DF\u65B9\u9762\uFF0C\u82CF\u5E2E\u83DC\u8C8C\u4F3C\u5728\u5168\u56FD\u5E76\u4E0D\u591A\u89C1\uFF0C\u53E3\u5473\u504F\u751C\u3002\u8FD9\u5C31\u4E0D\u77E5\u9053\u5927\u591A\u6570\u5317\u65B9\u4EBA\u80FD\u4E0D\u80FD\u5403\u5F97\u60EF\u4E86~</p><p>\u597D\u4E86\uFF0C\u5C31\u4ECB\u7ECD\u8FD9\u4E48\u591A\uFF0C\u6211\u611F\u89C9\u6211\u8FD8\u771F\u6709\u70B9\u60F3\u7ED9\u82CF\u5DDE\u5FAE\u8F6F\u6295\u7B80\u5386\u53BB\u5DE5\u4F5C\u751F\u6D3B\u4E00\u6BB5\u65F6\u95F4~</p>',50),_=t("\u4F5C\u8005\uFF1A\u5927\u767D\uFF0C\u8F6C\u8F7D\u94FE\u63A5\uFF1A"),v={href:"https://mp.weixin.qq.com/s/cnYsZLudFOwv5EKYMsMh0Q",target:"_blank",rel:"noopener noreferrer"},j=t("https://mp.weixin.qq.com/s/cnYsZLudFOwv5EKYMsMh0Q"),x=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png",alt:""})],-1);function z(y,k){const a=s("ExternalLinkIcon");return p(),n("div",null,[d,e("p",null,[i,e("a",b,[m,r(a)]),g,e("a",l,[f,r(a)])]),u,e("blockquote",null,[e("p",null,[_,e("a",v,[j,r(a)])])]),x])}var E=c(h,[["render",z],["__file","suzhou.html.vue"]]);export{E as default};
diff --git a/dist/assets/swagger.html.03ed15b7.js b/dist/assets/swagger.html.1142f08f.js
similarity index 71%
rename from dist/assets/swagger.html.03ed15b7.js
rename to dist/assets/swagger.html.1142f08f.js
index d5884521..8f05c4c6 100644
--- a/dist/assets/swagger.html.03ed15b7.js
+++ b/dist/assets/swagger.html.1142f08f.js
@@ -1 +1 @@
-const e={key:"v-eb0f47f4",path:"/springboot/swagger.html",title:"Spring Boot\u6574\u5408Swagger-UI\u5B9E\u73B0\u5728\u7EBFAPI\u6587\u6863",lang:"zh-CN",frontmatter:{category:["Java\u4F01\u4E1A\u7EA7\u5F00\u53D1"],tag:["Spring Boot"],title:"Spring Boot\u6574\u5408Swagger-UI\u5B9E\u73B0\u5728\u7EBFAPI\u6587\u6863",summary:'\u5173\u4E8E Swagger Swagger \u662F\u4E00\u4E2A\u7528\u4E8E\u751F\u6210\u3001\u63CF\u8FF0\u548C\u8C03\u7528 RESTful \u63A5\u53E3\u7684 Web \u670D\u52A1\u3002 "\u60F3\u8981\u7406\u89E3RESTful\u67B6\u6784\u7684\u8BDD\uFF0C\u53EF\u4EE5\u6233\u94FE\u63A5\u67E5\u770B\u962E\u4E00\u5CF0\u8001\u5E08\u7684\u535A\u5BA2\uFF1Ahttps://www.ruanyifeng.com/blog/2011/09/restful.html" \u6362\u53E5\u8BDD\u8BF4\uFF0CSwagger \u5C31\u662F\u5C06\u9879\u76EE\u4E2D\u60F3\u8981\u66B4\u9732\u7684\u63A5\u53E3\u5C55\u793A\u5728\u9875\u9762\u4E0A\uFF0C\u5F00\u53D1\u8005\u53EF\u4EE5\u76F4\u63A5',head:[["meta",{property:"og:url",content:"https://tobebetterjavaer.com/springboot/swagger.html"}],["meta",{property:"og:site_name",content:"Java \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF"}],["meta",{property:"og:title",content:"Spring Boot\u6574\u5408Swagger-UI\u5B9E\u73B0\u5728\u7EBFAPI\u6587\u6863"}],["meta",{property:"og:type",content:"article"}],["meta",{property:"og:updated_time",content:"2022-05-21T16:06:08.000Z"}],["meta",{property:"og:locale",content:"zh-CN"}],["meta",{property:"article:tag",content:"Spring Boot"}],["meta",{property:"article:modified_time",content:"2022-05-21T16:06:08.000Z"}]]},excerpt:"",headers:[{level:3,title:"\u5173\u4E8E Swagger",slug:"\u5173\u4E8E-swagger",children:[]},{level:3,title:"\u6574\u5408 Swagger-UI",slug:"\u6574\u5408-swagger-ui",children:[]},{level:3,title:"\u7248\u672C\u4E0D\u517C\u5BB9",slug:"\u7248\u672C\u4E0D\u517C\u5BB9",children:[]},{level:3,title:"\u5C0F\u7ED3",slug:"\u5C0F\u7ED3",children:[]},{level:3,title:"\u6E90\u7801\u8DEF\u5F84",slug:"\u6E90\u7801\u8DEF\u5F84",children:[]}],git:{createdTime:1652856927e3,updatedTime:1653149168e3,contributors:[{name:"itwanger",email:"www.qing_gee@163.com",commits:1},{name:"\u6C89\u9ED8\u738B\u4E8C",email:"www.qing_gee@163.com",commits:1}]},readingTime:{minutes:7.94,words:2382},filePathRelative:"springboot/swagger.md"};export{e as data};
+const e={key:"v-eb0f47f4",path:"/springboot/swagger.html",title:"Spring Boot\u6574\u5408Swagger-UI\u5B9E\u73B0\u5728\u7EBFAPI\u6587\u6863",lang:"zh-CN",frontmatter:{category:["Java\u4F01\u4E1A\u7EA7\u5F00\u53D1"],tag:["Spring Boot"],title:"Spring Boot\u6574\u5408Swagger-UI\u5B9E\u73B0\u5728\u7EBFAPI\u6587\u6863",summary:'\u5173\u4E8E Swagger Swagger \u662F\u4E00\u4E2A\u7528\u4E8E\u751F\u6210\u3001\u63CF\u8FF0\u548C\u8C03\u7528 RESTful \u63A5\u53E3\u7684 Web \u670D\u52A1\u3002 "\u60F3\u8981\u7406\u89E3RESTful\u67B6\u6784\u7684\u8BDD\uFF0C\u53EF\u4EE5\u6233\u94FE\u63A5\u67E5\u770B\u962E\u4E00\u5CF0\u8001\u5E08\u7684\u535A\u5BA2\uFF1Ahttps://www.ruanyifeng.com/blog/2011/09/restful.html" \u6362\u53E5\u8BDD\u8BF4\uFF0CSwagger \u5C31\u662F\u5C06\u9879\u76EE\u4E2D\u60F3\u8981\u66B4\u9732\u7684\u63A5\u53E3\u5C55\u793A\u5728\u9875\u9762\u4E0A\uFF0C\u5F00\u53D1\u8005\u53EF\u4EE5\u76F4\u63A5',head:[["meta",{property:"og:url",content:"https://tobebetterjavaer.com/springboot/swagger.html"}],["meta",{property:"og:site_name",content:"Java \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF"}],["meta",{property:"og:title",content:"Spring Boot\u6574\u5408Swagger-UI\u5B9E\u73B0\u5728\u7EBFAPI\u6587\u6863"}],["meta",{property:"og:type",content:"article"}],["meta",{property:"og:updated_time",content:"2022-06-10T11:28:25.000Z"}],["meta",{property:"og:locale",content:"zh-CN"}],["meta",{property:"article:tag",content:"Spring Boot"}],["meta",{property:"article:modified_time",content:"2022-06-10T11:28:25.000Z"}]]},excerpt:"",headers:[{level:2,title:"\u5173\u4E8E Swagger",slug:"\u5173\u4E8E-swagger",children:[]},{level:2,title:"\u6574\u5408 Swagger-UI",slug:"\u6574\u5408-swagger-ui",children:[]},{level:2,title:"\u7248\u672C\u4E0D\u517C\u5BB9",slug:"\u7248\u672C\u4E0D\u517C\u5BB9",children:[]},{level:2,title:"\u5C0F\u7ED3",slug:"\u5C0F\u7ED3",children:[]},{level:2,title:"\u6E90\u7801\u8DEF\u5F84",slug:"\u6E90\u7801\u8DEF\u5F84",children:[]}],git:{createdTime:1652856927e3,updatedTime:1654860505e3,contributors:[{name:"itwanger",email:"www.qing_gee@163.com",commits:2},{name:"\u6C89\u9ED8\u738B\u4E8C",email:"www.qing_gee@163.com",commits:1}]},readingTime:{minutes:7.96,words:2388},filePathRelative:"springboot/swagger.md"};export{e as data};
diff --git a/dist/assets/swagger.html.d41c975f.js b/dist/assets/swagger.html.e13d1880.js
similarity index 73%
rename from dist/assets/swagger.html.d41c975f.js
rename to dist/assets/swagger.html.e13d1880.js
index 79fd3947..9fcd661e 100644
--- a/dist/assets/swagger.html.d41c975f.js
+++ b/dist/assets/swagger.html.e13d1880.js
@@ -1,4 +1,4 @@
-import{_ as p}from"./plugin-vue_export-helper.21dcd24c.js";import{r as o,o as c,c as l,a as n,b as a,w as r,d as s,e as t}from"./app.a0271b9c.js";const u={},d=n("h3",{id:"\u5173\u4E8E-swagger",tabindex:"-1"},[n("a",{class:"header-anchor",href:"#\u5173\u4E8E-swagger","aria-hidden":"true"},"#"),s(" \u5173\u4E8E Swagger")],-1),g=n("p",null,"Swagger \u662F\u4E00\u4E2A\u7528\u4E8E\u751F\u6210\u3001\u63CF\u8FF0\u548C\u8C03\u7528 RESTful \u63A5\u53E3\u7684 Web \u670D\u52A1\u3002",-1),b=n("p",null,[n("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/swagger-febf2633-5b02-425b-a513-c8583e14d621.png",alt:""})],-1),v=s("\u60F3\u8981\u7406\u89E3RESTful\u67B6\u6784\u7684\u8BDD\uFF0C\u53EF\u4EE5\u6233\u94FE\u63A5\u67E5\u770B\u962E\u4E00\u5CF0\u8001\u5E08\u7684\u535A\u5BA2\uFF1A"),k={href:"https://www.ruanyifeng.com/blog/2011/09/restful.html",target:"_blank",rel:"noopener noreferrer"},m=s("https://www.ruanyifeng.com/blog/2011/09/restful.html"),h=n("p",null,"\u6362\u53E5\u8BDD\u8BF4\uFF0CSwagger \u5C31\u662F\u5C06\u9879\u76EE\u4E2D\u60F3\u8981\u66B4\u9732\u7684\u63A5\u53E3\u5C55\u793A\u5728\u9875\u9762\u4E0A\uFF0C\u5F00\u53D1\u8005\u53EF\u4EE5\u76F4\u63A5\u8FDB\u884C\u63A5\u53E3\u8C03\u7528\u548C\u6D4B\u8BD5\uFF0C\u80FD\u5728\u5F88\u5927\u7A0B\u5EA6\u4E0A\u63D0\u5347\u5F00\u53D1\u7684\u6548\u7387\u3002",-1),f=n("p",null,"\u6BD4\u5982\u8BF4\uFF0C\u4E00\u4E2A\u540E\u7AEF\u7A0B\u5E8F\u5458\u5199\u4E86\u4E00\u4E2A\u767B\u5F55\u63A5\u53E3\uFF0C\u60F3\u8981\u6D4B\u8BD5\u81EA\u5DF1\u5199\u7684\u63A5\u53E3\u662F\u5426\u7B26\u5408\u9884\u671F\u7684\u8BDD\uFF0C\u5C31\u5F97\u5148\u6A21\u62DF\u7528\u6237\u767B\u5F55\u7684\u884C\u4E3A\uFF0C\u5305\u62EC\u6B63\u5E38\u7684\u884C\u4E3A\uFF08\u8F93\u5165\u6B63\u786E\u7684\u7528\u6237\u540D\u548C\u5BC6\u7801\uFF09\u548C\u5F02\u5E38\u7684\u884C\u4E3A\uFF08\u8F93\u5165\u9519\u8BEF\u7684\u7528\u6237\u540D\u548C\u5BC6\u7801\uFF09\uFF0C\u8FD9\u5C31\u8981\u547D\u4E86\u3002",-1),w=n("p",null,"\u4F46\u6709\u4E86 Swagger \u540E\uFF0C\u53EF\u4EE5\u901A\u8FC7\u7B80\u5355\u7684\u914D\u7F6E\u751F\u6210\u63A5\u53E3\u7684\u5C55\u793A\u9875\u9762\uFF0C\u628A\u63A5\u53E3\u7684\u8BF7\u6C42\u53C2\u6570\u3001\u8FD4\u56DE\u7ED3\u679C\u901A\u8FC7\u53EF\u89C6\u5316\u7684\u5F62\u5F0F\u5C55\u793A\u51FA\u6765\uFF0C\u5E76\u4E14\u63D0\u4F9B\u4E86\u4FBF\u6377\u7684\u6D4B\u8BD5\u670D\u52A1\u3002",-1),_=n("ul",null,[n("li",null,"\u524D\u7AEF\u7A0B\u5E8F\u5458\u53EF\u4EE5\u901A\u8FC7\u63A5\u53E3\u5C55\u793A\u9875\u9762\u67E5\u770B\u9700\u8981\u4F20\u9012\u7684\u8BF7\u6C42\u53C2\u6570\u548C\u8FD4\u56DE\u7684\u6570\u636E\u683C\u5F0F\uFF0C\u4E0D\u9700\u8981\u540E\u7AEF\u7A0B\u5E8F\u5458\u518D\u7F16\u5199\u63A5\u53E3\u6587\u6863\u4E86\uFF1B"),n("li",null,"\u540E\u7AEF\u7A0B\u5E8F\u5458\u53EF\u4EE5\u901A\u8FC7\u63A5\u53E3\u5C55\u793A\u9875\u9762\u6D4B\u8BD5\u9A8C\u8BC1\u81EA\u5DF1\u7684\u63A5\u53E3\u662F\u5426\u7B26\u5408\u9884\u671F\uFF0C\u964D\u4F4E\u4E86\u5F00\u53D1\u9636\u6BB5\u7684\u8C03\u8BD5\u6210\u672C\u3002")],-1),q=n("p",null,"\u524D\u540E\u7AEF\u5206\u79BB\u5C31\u53EF\u4EE5\u5F88\u5B8C\u7F8E\u7684\u843D\u5730\u4E86\uFF0C\u6709\u6CA1\u6709\uFF1F",-1),S=s("Swagger \u5B98\u7F51\u5730\u5740\uFF1A"),x={href:"https://swagger.io/",target:"_blank",rel:"noopener noreferrer"},A=s("https://swagger.io/"),P=t(`<p>\u90A3\u5728 Swagger \u51FA\u73B0\u4E4B\u524D\uFF0C\u5C40\u9762\u5C31\u6BD4\u8F83\u7CDF\u7CD5\u3002\u524D\u7AEF\u7ECF\u5E38\u62B1\u6028\u540E\u7AEF\u7ED9\u7684\u63A5\u53E3\u6587\u6863\u4E0E\u5B9E\u9645\u60C5\u51B5\u4E0D\u4E00\u81F4\u3002\u540E\u7AEF\u53C8\u89C9\u5F97\u7F16\u5199\u53CA\u7EF4\u62A4\u63A5\u53E3\u6587\u6863\u4F1A\u8017\u8D39\u4E0D\u5C11\u7CBE\u529B\uFF0C\u7ECF\u5E38\u6765\u4E0D\u53CA\u66F4\u65B0\u3002</p><p>\u5927\u5BB6\u90FD\u88AB\u65E0\u60C5\u5730\u6298\u78E8\uFF0C\u75DB\u4E0D\u582A\u8A00\u3002\u3002\u3002</p><p>Swagger \u5B9A\u4E49\u4E86\u4E00\u5957\u89C4\u8303\uFF0C\u4F60\u53EA\u9700\u8981\u6309\u7167\u5B83\u7684\u89C4\u8303\u53BB\u5B9A\u4E49\u63A5\u53E3\u53CA\u63A5\u53E3\u76F8\u5173\u7684\u4FE1\u606F\uFF0C\u7136\u540E\u901A\u8FC7 Swagger \u884D\u751F\u51FA\u6765\u7684\u4E00\u7CFB\u5217\u5DE5\u5177\uFF0C\u5C31\u53EF\u4EE5\u751F\u6210\u5404\u79CD\u683C\u5F0F\u7684\u63A5\u53E3\u6587\u6863\uFF0C\u751A\u81F3\u8FD8\u53EF\u4EE5\u751F\u6210\u591A\u79CD\u8BED\u8A00\u7684\u5BA2\u6237\u7AEF\u548C\u670D\u52A1\u7AEF\u4EE3\u7801\uFF0C\u4EE5\u53CA\u5728\u7EBF\u63A5\u53E3\u8C03\u8BD5\u9875\u9762\u7B49\u7B49\u3002</p><p>\u90A3\u53EA\u8981\u53CA\u65F6\u66F4\u65B0 Swagger \u7684\u63CF\u8FF0\u6587\u4EF6\uFF0C\u5C31\u53EF\u4EE5\u81EA\u52A8\u751F\u6210\u63A5\u53E3\u6587\u6863\u4E86\uFF0C\u505A\u5230\u8C03\u7528\u7AEF\u4EE3\u7801\u3001\u670D\u52A1\u7AEF\u4EE3\u7801\u4EE5\u53CA\u63A5\u53E3\u6587\u6863\u7684\u4E00\u81F4\u6027\u3002</p><h3 id="\u6574\u5408-swagger-ui" tabindex="-1"><a class="header-anchor" href="#\u6574\u5408-swagger-ui" aria-hidden="true">#</a> \u6574\u5408 Swagger-UI</h3><p>Swagger-UI \u662F\u4E00\u5957 HTML/CSS/JS \u6846\u67B6\uFF0C\u7528\u4E8E\u6E32\u67D3 Swagger \u6587\u6863\uFF0C\u4EE5\u4FBF\u63D0\u4F9B\u7F8E\u89C2\u7684 API \u6587\u6863\u754C\u9762\u3002</p><p>\u4E5F\u5C31\u662F\u8BF4\uFF0CSwagger-UI \u662F Swagger \u63D0\u4F9B\u7684\u4E00\u5957\u53EF\u89C6\u5316\u6E32\u67D3\u7EC4\u4EF6\uFF0C\u652F\u6301\u5728\u7EBF\u5BFC\u5165\u63CF\u8FF0\u6587\u4EF6\u548C\u672C\u5730\u90E8\u7F72UI\u9879\u76EE\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/swagger-9cb36679-f1f7-469e-925e-2e54090f700f.png" alt=""></p><p>\u7B2C\u4E00\u6B65\uFF0C\u5728 pom.xml \u6587\u4EF6\u4E2D\u6DFB\u52A0 Swagger \u7684 starter\u3002</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
+import{_ as o}from"./plugin-vue_export-helper.21dcd24c.js";import{r as i,o as p,c,a as n,b as e,d as s,e as t}from"./app.615e41d8.js";const l={},r=n("h2",{id:"\u5173\u4E8E-swagger",tabindex:"-1"},[n("a",{class:"header-anchor",href:"#\u5173\u4E8E-swagger","aria-hidden":"true"},"#"),s(" \u5173\u4E8E Swagger")],-1),u=n("p",null,"Swagger \u662F\u4E00\u4E2A\u7528\u4E8E\u751F\u6210\u3001\u63CF\u8FF0\u548C\u8C03\u7528 RESTful \u63A5\u53E3\u7684 Web \u670D\u52A1\u3002",-1),d=n("p",null,[n("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/swagger-febf2633-5b02-425b-a513-c8583e14d621.png",alt:""})],-1),g=s("\u60F3\u8981\u7406\u89E3RESTful\u67B6\u6784\u7684\u8BDD\uFF0C\u53EF\u4EE5\u6233\u94FE\u63A5\u67E5\u770B\u962E\u4E00\u5CF0\u8001\u5E08\u7684\u535A\u5BA2\uFF1A"),b={href:"https://www.ruanyifeng.com/blog/2011/09/restful.html",target:"_blank",rel:"noopener noreferrer"},v=s("https://www.ruanyifeng.com/blog/2011/09/restful.html"),k=n("p",null,"\u6362\u53E5\u8BDD\u8BF4\uFF0CSwagger \u5C31\u662F\u5C06\u9879\u76EE\u4E2D\u60F3\u8981\u66B4\u9732\u7684\u63A5\u53E3\u5C55\u793A\u5728\u9875\u9762\u4E0A\uFF0C\u5F00\u53D1\u8005\u53EF\u4EE5\u76F4\u63A5\u8FDB\u884C\u63A5\u53E3\u8C03\u7528\u548C\u6D4B\u8BD5\uFF0C\u80FD\u5728\u5F88\u5927\u7A0B\u5EA6\u4E0A\u63D0\u5347\u5F00\u53D1\u7684\u6548\u7387\u3002",-1),m=n("p",null,"\u6BD4\u5982\u8BF4\uFF0C\u4E00\u4E2A\u540E\u7AEF\u7A0B\u5E8F\u5458\u5199\u4E86\u4E00\u4E2A\u767B\u5F55\u63A5\u53E3\uFF0C\u60F3\u8981\u6D4B\u8BD5\u81EA\u5DF1\u5199\u7684\u63A5\u53E3\u662F\u5426\u7B26\u5408\u9884\u671F\u7684\u8BDD\uFF0C\u5C31\u5F97\u5148\u6A21\u62DF\u7528\u6237\u767B\u5F55\u7684\u884C\u4E3A\uFF0C\u5305\u62EC\u6B63\u5E38\u7684\u884C\u4E3A\uFF08\u8F93\u5165\u6B63\u786E\u7684\u7528\u6237\u540D\u548C\u5BC6\u7801\uFF09\u548C\u5F02\u5E38\u7684\u884C\u4E3A\uFF08\u8F93\u5165\u9519\u8BEF\u7684\u7528\u6237\u540D\u548C\u5BC6\u7801\uFF09\uFF0C\u8FD9\u5C31\u8981\u547D\u4E86\u3002",-1),h=n("p",null,"\u4F46\u6709\u4E86 Swagger \u540E\uFF0C\u53EF\u4EE5\u901A\u8FC7\u7B80\u5355\u7684\u914D\u7F6E\u751F\u6210\u63A5\u53E3\u7684\u5C55\u793A\u9875\u9762\uFF0C\u628A\u63A5\u53E3\u7684\u8BF7\u6C42\u53C2\u6570\u3001\u8FD4\u56DE\u7ED3\u679C\u901A\u8FC7\u53EF\u89C6\u5316\u7684\u5F62\u5F0F\u5C55\u793A\u51FA\u6765\uFF0C\u5E76\u4E14\u63D0\u4F9B\u4E86\u4FBF\u6377\u7684\u6D4B\u8BD5\u670D\u52A1\u3002",-1),f=n("ul",null,[n("li",null,"\u524D\u7AEF\u7A0B\u5E8F\u5458\u53EF\u4EE5\u901A\u8FC7\u63A5\u53E3\u5C55\u793A\u9875\u9762\u67E5\u770B\u9700\u8981\u4F20\u9012\u7684\u8BF7\u6C42\u53C2\u6570\u548C\u8FD4\u56DE\u7684\u6570\u636E\u683C\u5F0F\uFF0C\u4E0D\u9700\u8981\u540E\u7AEF\u7A0B\u5E8F\u5458\u518D\u7F16\u5199\u63A5\u53E3\u6587\u6863\u4E86\uFF1B"),n("li",null,"\u540E\u7AEF\u7A0B\u5E8F\u5458\u53EF\u4EE5\u901A\u8FC7\u63A5\u53E3\u5C55\u793A\u9875\u9762\u6D4B\u8BD5\u9A8C\u8BC1\u81EA\u5DF1\u7684\u63A5\u53E3\u662F\u5426\u7B26\u5408\u9884\u671F\uFF0C\u964D\u4F4E\u4E86\u5F00\u53D1\u9636\u6BB5\u7684\u8C03\u8BD5\u6210\u672C\u3002")],-1),w=n("p",null,"\u524D\u540E\u7AEF\u5206\u79BB\u5C31\u53EF\u4EE5\u5F88\u5B8C\u7F8E\u7684\u843D\u5730\u4E86\uFF0C\u6709\u6CA1\u6709\uFF1F",-1),_=s("Swagger \u5B98\u7F51\u5730\u5740\uFF1A"),q={href:"https://swagger.io/",target:"_blank",rel:"noopener noreferrer"},S=s("https://swagger.io/"),x=t(`<p>\u90A3\u5728 Swagger \u51FA\u73B0\u4E4B\u524D\uFF0C\u5C40\u9762\u5C31\u6BD4\u8F83\u7CDF\u7CD5\u3002\u524D\u7AEF\u7ECF\u5E38\u62B1\u6028\u540E\u7AEF\u7ED9\u7684\u63A5\u53E3\u6587\u6863\u4E0E\u5B9E\u9645\u60C5\u51B5\u4E0D\u4E00\u81F4\u3002\u540E\u7AEF\u53C8\u89C9\u5F97\u7F16\u5199\u53CA\u7EF4\u62A4\u63A5\u53E3\u6587\u6863\u4F1A\u8017\u8D39\u4E0D\u5C11\u7CBE\u529B\uFF0C\u7ECF\u5E38\u6765\u4E0D\u53CA\u66F4\u65B0\u3002</p><p>\u5927\u5BB6\u90FD\u88AB\u65E0\u60C5\u5730\u6298\u78E8\uFF0C\u75DB\u4E0D\u582A\u8A00\u3002\u3002\u3002</p><p>Swagger \u5B9A\u4E49\u4E86\u4E00\u5957\u89C4\u8303\uFF0C\u4F60\u53EA\u9700\u8981\u6309\u7167\u5B83\u7684\u89C4\u8303\u53BB\u5B9A\u4E49\u63A5\u53E3\u53CA\u63A5\u53E3\u76F8\u5173\u7684\u4FE1\u606F\uFF0C\u7136\u540E\u901A\u8FC7 Swagger \u884D\u751F\u51FA\u6765\u7684\u4E00\u7CFB\u5217\u5DE5\u5177\uFF0C\u5C31\u53EF\u4EE5\u751F\u6210\u5404\u79CD\u683C\u5F0F\u7684\u63A5\u53E3\u6587\u6863\uFF0C\u751A\u81F3\u8FD8\u53EF\u4EE5\u751F\u6210\u591A\u79CD\u8BED\u8A00\u7684\u5BA2\u6237\u7AEF\u548C\u670D\u52A1\u7AEF\u4EE3\u7801\uFF0C\u4EE5\u53CA\u5728\u7EBF\u63A5\u53E3\u8C03\u8BD5\u9875\u9762\u7B49\u7B49\u3002</p><p>\u90A3\u53EA\u8981\u53CA\u65F6\u66F4\u65B0 Swagger \u7684\u63CF\u8FF0\u6587\u4EF6\uFF0C\u5C31\u53EF\u4EE5\u81EA\u52A8\u751F\u6210\u63A5\u53E3\u6587\u6863\u4E86\uFF0C\u505A\u5230\u8C03\u7528\u7AEF\u4EE3\u7801\u3001\u670D\u52A1\u7AEF\u4EE3\u7801\u4EE5\u53CA\u63A5\u53E3\u6587\u6863\u7684\u4E00\u81F4\u6027\u3002</p><h2 id="\u6574\u5408-swagger-ui" tabindex="-1"><a class="header-anchor" href="#\u6574\u5408-swagger-ui" aria-hidden="true">#</a> \u6574\u5408 Swagger-UI</h2><p>Swagger-UI \u662F\u4E00\u5957 HTML/CSS/JS \u6846\u67B6\uFF0C\u7528\u4E8E\u6E32\u67D3 Swagger \u6587\u6863\uFF0C\u4EE5\u4FBF\u63D0\u4F9B\u7F8E\u89C2\u7684 API \u6587\u6863\u754C\u9762\u3002</p><p>\u4E5F\u5C31\u662F\u8BF4\uFF0CSwagger-UI \u662F Swagger \u63D0\u4F9B\u7684\u4E00\u5957\u53EF\u89C6\u5316\u6E32\u67D3\u7EC4\u4EF6\uFF0C\u652F\u6301\u5728\u7EBF\u5BFC\u5165\u63CF\u8FF0\u6587\u4EF6\u548C\u672C\u5730\u90E8\u7F72UI\u9879\u76EE\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/swagger-9cb36679-f1f7-469e-925e-2e54090f700f.png" alt=""></p><p>\u7B2C\u4E00\u6B65\uFF0C\u5728 pom.xml \u6587\u4EF6\u4E2D\u6DFB\u52A0 Swagger \u7684 starter\u3002</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
     &lt;groupId&gt;io.springfox&lt;/groupId&gt;
     &lt;artifactId&gt;springfox-boot-starter&lt;/artifactId&gt;
     &lt;version&gt;3.0.0&lt;/version&gt;
@@ -43,7 +43,7 @@ import{_ as p}from"./plugin-vue_export-helper.21dcd24c.js";import{r as o,o as c,
         <span class="token keyword">return</span> <span class="token string">&quot;\u6C89\u9ED8\u738B\u4E8C\u53C8\u5E05\u53C8\u4E11&quot;</span><span class="token punctuation">;</span>
     <span class="token punctuation">}</span>
 <span class="token punctuation">}</span>
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>1\uFF09@Api\u6CE8\u89E3\uFF0C\u7528\u5728\u7C7B\u4E0A\uFF0C\u8BE5\u6CE8\u89E3\u5C06\u63A7\u5236\u5668\u6807\u6CE8\u4E3A\u4E00\u4E2A Swagger \u8D44\u6E90\u3002\u8BE5\u6CE8\u89E3\u6709 3 \u4E2A\u5C5E\u6027\uFF1A</p><ul><li>tags\uFF0C\u5177\u6709\u76F8\u540C\u6807\u7B7E\u7684 API \u4F1A\u88AB\u5F52\u5728\u4E00\u7EC4\u5185\u5C55\u793A</li><li>value\uFF0C\u5982\u679C tags \u6CA1\u6709\u5B9A\u4E49\uFF0Cvalue \u5C06\u4F5C\u4E3A API \u7684 tags \u4F7F\u7528\u3002</li><li>description\uFF0C\u5DF2\u5E9F\u5F03</li></ul><p>2\uFF09@ApiOperation \u6CE8\u89E3\uFF0C\u7528\u5728\u65B9\u6CD5\u4E0A\uFF0C\u63CF\u8FF0\u8FD9\u4E2A\u65B9\u6CD5\u662F\u505A\u4EC0\u4E48\u7528\u7684\u3002\u8BE5\u6CE8\u89E3\u6709 4 \u4E2A\u5C5E\u6027\uFF1A</p><ul><li>value \u64CD\u4F5C\u7684\u7B80\u5355\u8BF4\u660E\uFF0C\u957F\u5EA6\u4E3A120\u4E2A\u5B57\u6BCD\uFF0C60\u4E2A\u6C49\u5B57\u3002</li><li>notes \u5BF9\u64CD\u4F5C\u7684\u8BE6\u7EC6\u8BF4\u660E\u3002</li><li>httpMethod HTTP\u8BF7\u6C42\u7684\u52A8\u4F5C\u540D\uFF0C\u53EF\u9009\u503C\u6709\uFF1A&quot;GET&quot;, &quot;HEAD&quot;, &quot;POST&quot;, &quot;PUT&quot;, &quot;DELETE&quot;, &quot;OPTIONS&quot; and &quot;PATCH&quot;\u3002</li><li>code \u9ED8\u8BA4\u4E3A200\uFF0C\u6709\u6548\u503C\u5FC5\u987B\u7B26\u5408\u6807\u51C6\u7684HTTP Status Code Definitions\u3002</li></ul><p>3\uFF09@RestController \u6CE8\u89E3\uFF0C\u7528\u5728\u7C7B\u4E0A\uFF0C\u662F@ResponseBody\u548C@Controller\u7684\u7EC4\u5408\u6CE8\u89E3\uFF0C\u5982\u679C\u65B9\u6CD5\u8981\u8FD4\u56DE JSON \u7684\u8BDD\uFF0C\u53EF\u7701\u53BB @ResponseBody \u6CE8\u89E3\u3002</p><p>4\uFF09@RequestMapping \u6CE8\u89E3\uFF0C\u53EF\u7528\u5728\u7C7B\uFF08\u7236\u8DEF\u5F84\uFF09\u548C\u65B9\u6CD5\uFF08\u5B50\u8DEF\u5F84\uFF09\u4E0A\uFF0C\u4E3B\u8981\u7528\u6765\u5B9A\u4E49 API \u7684\u8BF7\u6C42\u8DEF\u5F84\u548C\u8BF7\u6C42\u7C7B\u578B\u3002\u8BE5\u6CE8\u89E3\u6709 6 \u4E2A\u5C5E\u6027\uFF1A</p><ul><li>value\uFF0C\u6307\u5B9A\u8BF7\u6C42\u7684\u5B9E\u9645\u5730\u5740</li><li>method\uFF0C\u6307\u5B9A\u8BF7\u6C42\u7684method\u7C7B\u578B\uFF0C GET\u3001POST\u3001PUT\u3001DELETE\u7B49</li><li>consumes\uFF0C\u6307\u5B9A\u5904\u7406\u8BF7\u6C42\u7684\u63D0\u4EA4\u5185\u5BB9\u7C7B\u578B\uFF08Content-Type\uFF09\uFF0C\u4F8B\u5982 application/json, text/html</li><li>produces\uFF0C\u6307\u5B9A\u8FD4\u56DE\u7684\u5185\u5BB9\u7C7B\u578B\uFF0C\u4EC5\u5F53request\u8BF7\u6C42\u5934\u4E2D\u7684(Accept)\u7C7B\u578B\u4E2D\u5305\u542B\u8BE5\u6307\u5B9A\u7C7B\u578B\u624D\u8FD4\u56DE</li><li>params\uFF0C\u6307\u5B9Arequest\u4E2D\u5FC5\u987B\u5305\u542B\u67D0\u4E9B\u53C2\u6570\u503C</li><li>headers\uFF0C\u6307\u5B9Arequest\u4E2D\u5FC5\u987B\u5305\u542B\u67D0\u4E9B\u6307\u5B9A\u7684header\u503C</li></ul><p>\u7B2C\u56DB\u6B65\uFF0C\u542F\u52A8\u670D\u52A1\uFF0C\u5728\u6D4F\u89C8\u5668\u4E2D\u8F93\u5165 <code>http://localhost:8080/swagger-ui/</code> \u5C31\u53EF\u4EE5\u8BBF\u95EE Swagger \u751F\u6210\u7684 API \u6587\u6863\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/swagger-25187213-723a-4120-8485-06759a509659.png" alt=""></p><p>\u70B9\u5F00 get \u8BF7\u6C42\u7684\u9762\u677F\uFF0C\u70B9\u51FB\u300Ctry it out\u300D\u518D\u70B9\u51FB\u300Cexcute\u300D\u53EF\u4EE5\u67E5\u770B\u63A5\u53E3\u8FD4\u56DE\u7684\u6570\u636E\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/swagger-0f2b9c42-bae4-4712-be29-3771ab3bd3a8.png" alt=""></p><h3 id="\u7248\u672C\u4E0D\u517C\u5BB9" tabindex="-1"><a class="header-anchor" href="#\u7248\u672C\u4E0D\u517C\u5BB9" aria-hidden="true">#</a> \u7248\u672C\u4E0D\u517C\u5BB9</h3><p>\u5728 Spring Boot \u6574\u5408 Swagger \u7684\u8FC7\u7A0B\u4E2D\uFF0C\u6211\u53D1\u73B0\u4E00\u4E2A\u5927 bug\uFF0CSpring Boot 2.6.7 \u7248\u672C\u548C springfox 3.0.0 \u7248\u672C\u4E0D\u517C\u5BB9\uFF0C\u542F\u52A8\u7684\u65F6\u5019\u76F4\u63A5\u5C31\u62A5\u9519\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/swagger-529160e4-aa31-410a-aa04-93e9576322b6.png" alt=""></p><blockquote><p>Caused by: java.lang.NullPointerException: Cannot invoke &quot;org.springframework.web.servlet.mvc.condition.PatternsRequestCondition.getPatterns()&quot; because &quot;this.condition&quot; is null</p></blockquote><p>\u4E00\u8DEF\u8DDF\u8E2A\u4E0B\u6765\uFF0C\u53D1\u73B0 GitHub \u4E0A\u786E\u8BA4\u6709\u4EBA\u5728 Spring Boot \u4ED3\u5E93\u4E0B\u63D0\u5230\u4E86\u8FD9\u4E2A bug\u3002</p>`,39),j={href:"https://github.com/spring-projects/spring-boot/issues/28794",target:"_blank",rel:"noopener noreferrer"},y=s("https://github.com/spring-projects/spring-boot/issues/28794"),I=t(`<p>Spring Boot \u8BF4\u8FD9\u662F springfox \u7684 bug\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/swagger-d0d336e1-2cba-49f4-bd65-6df7f89a6c9f.png" alt=""></p><p>\u8FFD\u8E2A\u8FC7\u6765\u4E00\u770B\uFF0C\u786E\u5B9E\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/swagger-cb3c15e7-ecfd-4e5e-92b7-673acb966a54.png" alt=""></p><p>\u6709\u4EBA\u63D0\u5230\u7684\u89E3\u51B3\u65B9\u6848\u662F\u5207\u6362\u5230 SpringDoc\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/swagger-0597f86d-1188-4fe1-8de8-fdb57c5cd524.png" alt=""></p><p>\u8FD9\u6837\u5C31\u9700\u8981\u5207\u6362\u6CE8\u89E3 <code>@Api \u2192 @Tag</code>\uFF0C<code>@ApiOperation(value = &quot;foo&quot;, notes = &quot;bar&quot;) \u2192 @Operation(summary = &quot;foo&quot;, description = &quot;bar&quot;)</code>\uFF0C\u5BF9\u65E7\u9879\u76EE\u4E0D\u662F\u5F88\u53CB\u597D\uFF0C\u5982\u679C\u662F\u65B0\u9879\u76EE\u7684\u8BDD\uFF0C\u5012\u662F\u53EF\u4EE5\u76F4\u63A5\u5C1D\u8BD5 SpringDoc\u3002</p><p>\u8FD8\u6709\u4EBA\u63D0\u51FA\u7684\u89E3\u51B3\u65B9\u6848\u662F\uFF1A</p><ul><li>\u5148\u5C06\u5339\u914D\u7B56\u7565\u8C03\u6574\u4E3A ant-path-matcher\uFF08application.yml\uFF09\u3002</li></ul><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>spring:
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>1\uFF09@Api\u6CE8\u89E3\uFF0C\u7528\u5728\u7C7B\u4E0A\uFF0C\u8BE5\u6CE8\u89E3\u5C06\u63A7\u5236\u5668\u6807\u6CE8\u4E3A\u4E00\u4E2A Swagger \u8D44\u6E90\u3002\u8BE5\u6CE8\u89E3\u6709 3 \u4E2A\u5C5E\u6027\uFF1A</p><ul><li>tags\uFF0C\u5177\u6709\u76F8\u540C\u6807\u7B7E\u7684 API \u4F1A\u88AB\u5F52\u5728\u4E00\u7EC4\u5185\u5C55\u793A</li><li>value\uFF0C\u5982\u679C tags \u6CA1\u6709\u5B9A\u4E49\uFF0Cvalue \u5C06\u4F5C\u4E3A API \u7684 tags \u4F7F\u7528\u3002</li><li>description\uFF0C\u5DF2\u5E9F\u5F03</li></ul><p>2\uFF09@ApiOperation \u6CE8\u89E3\uFF0C\u7528\u5728\u65B9\u6CD5\u4E0A\uFF0C\u63CF\u8FF0\u8FD9\u4E2A\u65B9\u6CD5\u662F\u505A\u4EC0\u4E48\u7528\u7684\u3002\u8BE5\u6CE8\u89E3\u6709 4 \u4E2A\u5C5E\u6027\uFF1A</p><ul><li>value \u64CD\u4F5C\u7684\u7B80\u5355\u8BF4\u660E\uFF0C\u957F\u5EA6\u4E3A120\u4E2A\u5B57\u6BCD\uFF0C60\u4E2A\u6C49\u5B57\u3002</li><li>notes \u5BF9\u64CD\u4F5C\u7684\u8BE6\u7EC6\u8BF4\u660E\u3002</li><li>httpMethod HTTP\u8BF7\u6C42\u7684\u52A8\u4F5C\u540D\uFF0C\u53EF\u9009\u503C\u6709\uFF1A&quot;GET&quot;, &quot;HEAD&quot;, &quot;POST&quot;, &quot;PUT&quot;, &quot;DELETE&quot;, &quot;OPTIONS&quot; and &quot;PATCH&quot;\u3002</li><li>code \u9ED8\u8BA4\u4E3A200\uFF0C\u6709\u6548\u503C\u5FC5\u987B\u7B26\u5408\u6807\u51C6\u7684HTTP Status Code Definitions\u3002</li></ul><p>3\uFF09@RestController \u6CE8\u89E3\uFF0C\u7528\u5728\u7C7B\u4E0A\uFF0C\u662F@ResponseBody\u548C@Controller\u7684\u7EC4\u5408\u6CE8\u89E3\uFF0C\u5982\u679C\u65B9\u6CD5\u8981\u8FD4\u56DE JSON \u7684\u8BDD\uFF0C\u53EF\u7701\u53BB @ResponseBody \u6CE8\u89E3\u3002</p><p>4\uFF09@RequestMapping \u6CE8\u89E3\uFF0C\u53EF\u7528\u5728\u7C7B\uFF08\u7236\u8DEF\u5F84\uFF09\u548C\u65B9\u6CD5\uFF08\u5B50\u8DEF\u5F84\uFF09\u4E0A\uFF0C\u4E3B\u8981\u7528\u6765\u5B9A\u4E49 API \u7684\u8BF7\u6C42\u8DEF\u5F84\u548C\u8BF7\u6C42\u7C7B\u578B\u3002\u8BE5\u6CE8\u89E3\u6709 6 \u4E2A\u5C5E\u6027\uFF1A</p><ul><li>value\uFF0C\u6307\u5B9A\u8BF7\u6C42\u7684\u5B9E\u9645\u5730\u5740</li><li>method\uFF0C\u6307\u5B9A\u8BF7\u6C42\u7684method\u7C7B\u578B\uFF0C GET\u3001POST\u3001PUT\u3001DELETE\u7B49</li><li>consumes\uFF0C\u6307\u5B9A\u5904\u7406\u8BF7\u6C42\u7684\u63D0\u4EA4\u5185\u5BB9\u7C7B\u578B\uFF08Content-Type\uFF09\uFF0C\u4F8B\u5982 application/json, text/html</li><li>produces\uFF0C\u6307\u5B9A\u8FD4\u56DE\u7684\u5185\u5BB9\u7C7B\u578B\uFF0C\u4EC5\u5F53request\u8BF7\u6C42\u5934\u4E2D\u7684(Accept)\u7C7B\u578B\u4E2D\u5305\u542B\u8BE5\u6307\u5B9A\u7C7B\u578B\u624D\u8FD4\u56DE</li><li>params\uFF0C\u6307\u5B9Arequest\u4E2D\u5FC5\u987B\u5305\u542B\u67D0\u4E9B\u53C2\u6570\u503C</li><li>headers\uFF0C\u6307\u5B9Arequest\u4E2D\u5FC5\u987B\u5305\u542B\u67D0\u4E9B\u6307\u5B9A\u7684header\u503C</li></ul><p>\u7B2C\u56DB\u6B65\uFF0C\u542F\u52A8\u670D\u52A1\uFF0C\u5728\u6D4F\u89C8\u5668\u4E2D\u8F93\u5165 <code>http://localhost:8080/swagger-ui/</code> \u5C31\u53EF\u4EE5\u8BBF\u95EE Swagger \u751F\u6210\u7684 API \u6587\u6863\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/swagger-25187213-723a-4120-8485-06759a509659.png" alt=""></p><p>\u70B9\u5F00 get \u8BF7\u6C42\u7684\u9762\u677F\uFF0C\u70B9\u51FB\u300Ctry it out\u300D\u518D\u70B9\u51FB\u300Cexcute\u300D\u53EF\u4EE5\u67E5\u770B\u63A5\u53E3\u8FD4\u56DE\u7684\u6570\u636E\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/swagger-0f2b9c42-bae4-4712-be29-3771ab3bd3a8.png" alt=""></p><h2 id="\u7248\u672C\u4E0D\u517C\u5BB9" tabindex="-1"><a class="header-anchor" href="#\u7248\u672C\u4E0D\u517C\u5BB9" aria-hidden="true">#</a> \u7248\u672C\u4E0D\u517C\u5BB9</h2><p>\u5728 Spring Boot \u6574\u5408 Swagger \u7684\u8FC7\u7A0B\u4E2D\uFF0C\u6211\u53D1\u73B0\u4E00\u4E2A\u5927 bug\uFF0CSpring Boot 2.6.7 \u7248\u672C\u548C springfox 3.0.0 \u7248\u672C\u4E0D\u517C\u5BB9\uFF0C\u542F\u52A8\u7684\u65F6\u5019\u76F4\u63A5\u5C31\u62A5\u9519\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/swagger-529160e4-aa31-410a-aa04-93e9576322b6.png" alt=""></p><blockquote><p>Caused by: java.lang.NullPointerException: Cannot invoke &quot;org.springframework.web.servlet.mvc.condition.PatternsRequestCondition.getPatterns()&quot; because &quot;this.condition&quot; is null</p></blockquote><p>\u4E00\u8DEF\u8DDF\u8E2A\u4E0B\u6765\uFF0C\u53D1\u73B0 GitHub \u4E0A\u786E\u8BA4\u6709\u4EBA\u5728 Spring Boot \u4ED3\u5E93\u4E0B\u63D0\u5230\u4E86\u8FD9\u4E2A bug\u3002</p>`,39),A={href:"https://github.com/spring-projects/spring-boot/issues/28794",target:"_blank",rel:"noopener noreferrer"},j=s("https://github.com/spring-projects/spring-boot/issues/28794"),P=t(`<p>Spring Boot \u8BF4\u8FD9\u662F springfox \u7684 bug\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/swagger-d0d336e1-2cba-49f4-bd65-6df7f89a6c9f.png" alt=""></p><p>\u8FFD\u8E2A\u8FC7\u6765\u4E00\u770B\uFF0C\u786E\u5B9E\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/swagger-cb3c15e7-ecfd-4e5e-92b7-673acb966a54.png" alt=""></p><p>\u6709\u4EBA\u63D0\u5230\u7684\u89E3\u51B3\u65B9\u6848\u662F\u5207\u6362\u5230 SpringDoc\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/swagger-0597f86d-1188-4fe1-8de8-fdb57c5cd524.png" alt=""></p><p>\u8FD9\u6837\u5C31\u9700\u8981\u5207\u6362\u6CE8\u89E3 <code>@Api \u2192 @Tag</code>\uFF0C<code>@ApiOperation(value = &quot;foo&quot;, notes = &quot;bar&quot;) \u2192 @Operation(summary = &quot;foo&quot;, description = &quot;bar&quot;)</code>\uFF0C\u5BF9\u65E7\u9879\u76EE\u4E0D\u662F\u5F88\u53CB\u597D\uFF0C\u5982\u679C\u662F\u65B0\u9879\u76EE\u7684\u8BDD\uFF0C\u5012\u662F\u53EF\u4EE5\u76F4\u63A5\u5C1D\u8BD5 SpringDoc\u3002</p><p>\u8FD8\u6709\u4EBA\u63D0\u51FA\u7684\u89E3\u51B3\u65B9\u6848\u662F\uFF1A</p><ul><li>\u5148\u5C06\u5339\u914D\u7B56\u7565\u8C03\u6574\u4E3A ant-path-matcher\uFF08application.yml\uFF09\u3002</li></ul><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>spring:
   mvc:
     path match:
       matching-strategy: ANT_PATH_MATCHER
@@ -79,4 +79,4 @@ public static BeanPostProcessor springfoxHandlerProviderBeanPostProcessor() {
         }
     };
 }
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div 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diff --git a/dist/assets/synchronized.html.2e0681cb.js b/dist/assets/synchronized.html.0249091e.js
similarity index 99%
rename from dist/assets/synchronized.html.2e0681cb.js
rename to dist/assets/synchronized.html.0249091e.js
index 57c4b67b..82df65e4 100644
--- a/dist/assets/synchronized.html.2e0681cb.js
+++ b/dist/assets/synchronized.html.0249091e.js
@@ -1,4 +1,4 @@
-import{_ as t}from"./plugin-vue_export-helper.21dcd24c.js";import{r as o,o as d,c,a as n,b as s,e as p,d as e}from"./app.a0271b9c.js";const i={},r=p(`<h1 id="java\u4E2D\u7684synchronized\u5173\u952E\u5B57\u9501\u7684\u5230\u5E95\u662F\u4EC0\u4E48" tabindex="-1"><a class="header-anchor" href="#java\u4E2D\u7684synchronized\u5173\u952E\u5B57\u9501\u7684\u5230\u5E95\u662F\u4EC0\u4E48" aria-hidden="true">#</a> Java\u4E2D\u7684synchronized\u5173\u952E\u5B57\u9501\u7684\u5230\u5E95\u662F\u4EC0\u4E48\uFF1F</h1><p>\u8FD9\u7BC7\u6587\u7AE0\u6211\u4EEC\u6765\u804A\u4E00\u804AJava\u591A\u7EBF\u7A0B\u91CC\u9762\u7684\u201C\u9501\u201D\u3002</p><p>\u9996\u5148\u9700\u8981\u660E\u786E\u7684\u4E00\u70B9\u662F\uFF1A<strong>Java\u591A\u7EBF\u7A0B\u7684\u9501\u90FD\u662F\u57FA\u4E8E\u5BF9\u8C61\u7684</strong>\uFF0CJava\u4E2D\u7684\u6BCF\u4E00\u4E2A\u5BF9\u8C61\u90FD\u53EF\u4EE5\u4F5C\u4E3A\u4E00\u4E2A\u9501\u3002</p><p>\u8FD8\u6709\u4E00\u70B9\u9700\u8981\u6CE8\u610F\u7684\u662F\uFF0C\u6211\u4EEC\u5E38\u542C\u5230\u7684<strong>\u7C7B\u9501</strong>\u5176\u5B9E\u4E5F\u662F\u5BF9\u8C61\u9501\u3002</p><p>Java\u7C7B\u53EA\u6709\u4E00\u4E2AClass\u5BF9\u8C61\uFF08\u53EF\u4EE5\u6709\u591A\u4E2A\u5B9E\u4F8B\u5BF9\u8C61\uFF0C\u591A\u4E2A\u5B9E\u4F8B\u5171\u4EAB\u8FD9\u4E2AClass\u5BF9\u8C61\uFF09\uFF0C\u800CClass\u5BF9\u8C61\u4E5F\u662F\u7279\u6B8A\u7684Java\u5BF9\u8C61\u3002\u6240\u4EE5\u6211\u4EEC\u5E38\u8BF4\u7684\u7C7B\u9501\uFF0C\u5176\u5B9E\u5C31\u662FClass\u5BF9\u8C61\u7684\u9501\u3002</p><h2 id="synchronized\u5173\u952E\u5B57" tabindex="-1"><a class="header-anchor" href="#synchronized\u5173\u952E\u5B57" aria-hidden="true">#</a> Synchronized\u5173\u952E\u5B57</h2><p>\u8BF4\u5230\u9501\uFF0C\u6211\u4EEC\u901A\u5E38\u4F1A\u8C08\u5230<code>synchronized</code>\u8FD9\u4E2A\u5173\u952E\u5B57\u3002\u5B83\u7FFB\u8BD1\u6210\u4E2D\u6587\u5C31\u662F\u201C\u540C\u6B65\u201D\u7684\u610F\u601D\u3002</p><p>\u6211\u4EEC\u901A\u5E38\u4F7F\u7528<code>synchronized</code>\u5173\u952E\u5B57\u6765\u7ED9\u4E00\u6BB5\u4EE3\u7801\u6216\u4E00\u4E2A\u65B9\u6CD5\u4E0A\u9501\u3002\u5B83\u901A\u5E38\u6709\u4EE5\u4E0B\u4E09\u79CD\u5F62\u5F0F\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token comment">// \u5173\u952E\u5B57\u5728\u5B9E\u4F8B\u65B9\u6CD5\u4E0A\uFF0C\u9501\u4E3A\u5F53\u524D\u5B9E\u4F8B</span>
+import{_ as t}from"./plugin-vue_export-helper.21dcd24c.js";import{r as o,o as d,c,a as n,b as s,e as p,d as e}from"./app.615e41d8.js";const i={},r=p(`<h1 id="java\u4E2D\u7684synchronized\u5173\u952E\u5B57\u9501\u7684\u5230\u5E95\u662F\u4EC0\u4E48" tabindex="-1"><a class="header-anchor" href="#java\u4E2D\u7684synchronized\u5173\u952E\u5B57\u9501\u7684\u5230\u5E95\u662F\u4EC0\u4E48" aria-hidden="true">#</a> Java\u4E2D\u7684synchronized\u5173\u952E\u5B57\u9501\u7684\u5230\u5E95\u662F\u4EC0\u4E48\uFF1F</h1><p>\u8FD9\u7BC7\u6587\u7AE0\u6211\u4EEC\u6765\u804A\u4E00\u804AJava\u591A\u7EBF\u7A0B\u91CC\u9762\u7684\u201C\u9501\u201D\u3002</p><p>\u9996\u5148\u9700\u8981\u660E\u786E\u7684\u4E00\u70B9\u662F\uFF1A<strong>Java\u591A\u7EBF\u7A0B\u7684\u9501\u90FD\u662F\u57FA\u4E8E\u5BF9\u8C61\u7684</strong>\uFF0CJava\u4E2D\u7684\u6BCF\u4E00\u4E2A\u5BF9\u8C61\u90FD\u53EF\u4EE5\u4F5C\u4E3A\u4E00\u4E2A\u9501\u3002</p><p>\u8FD8\u6709\u4E00\u70B9\u9700\u8981\u6CE8\u610F\u7684\u662F\uFF0C\u6211\u4EEC\u5E38\u542C\u5230\u7684<strong>\u7C7B\u9501</strong>\u5176\u5B9E\u4E5F\u662F\u5BF9\u8C61\u9501\u3002</p><p>Java\u7C7B\u53EA\u6709\u4E00\u4E2AClass\u5BF9\u8C61\uFF08\u53EF\u4EE5\u6709\u591A\u4E2A\u5B9E\u4F8B\u5BF9\u8C61\uFF0C\u591A\u4E2A\u5B9E\u4F8B\u5171\u4EAB\u8FD9\u4E2AClass\u5BF9\u8C61\uFF09\uFF0C\u800CClass\u5BF9\u8C61\u4E5F\u662F\u7279\u6B8A\u7684Java\u5BF9\u8C61\u3002\u6240\u4EE5\u6211\u4EEC\u5E38\u8BF4\u7684\u7C7B\u9501\uFF0C\u5176\u5B9E\u5C31\u662FClass\u5BF9\u8C61\u7684\u9501\u3002</p><h2 id="synchronized\u5173\u952E\u5B57" tabindex="-1"><a class="header-anchor" href="#synchronized\u5173\u952E\u5B57" aria-hidden="true">#</a> Synchronized\u5173\u952E\u5B57</h2><p>\u8BF4\u5230\u9501\uFF0C\u6211\u4EEC\u901A\u5E38\u4F1A\u8C08\u5230<code>synchronized</code>\u8FD9\u4E2A\u5173\u952E\u5B57\u3002\u5B83\u7FFB\u8BD1\u6210\u4E2D\u6587\u5C31\u662F\u201C\u540C\u6B65\u201D\u7684\u610F\u601D\u3002</p><p>\u6211\u4EEC\u901A\u5E38\u4F7F\u7528<code>synchronized</code>\u5173\u952E\u5B57\u6765\u7ED9\u4E00\u6BB5\u4EE3\u7801\u6216\u4E00\u4E2A\u65B9\u6CD5\u4E0A\u9501\u3002\u5B83\u901A\u5E38\u6709\u4EE5\u4E0B\u4E09\u79CD\u5F62\u5F0F\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token comment">// \u5173\u952E\u5B57\u5728\u5B9E\u4F8B\u65B9\u6CD5\u4E0A\uFF0C\u9501\u4E3A\u5F53\u524D\u5B9E\u4F8B</span>
 <span class="token keyword">public</span> <span class="token keyword">synchronized</span> <span class="token keyword">void</span> <span class="token function">instanceLock</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
     <span class="token comment">// code</span>
 <span class="token punctuation">}</span>
diff --git a/dist/assets/tabby.html.5c93d604.js b/dist/assets/tabby.html.c3b44c08.js
similarity index 99%
rename from dist/assets/tabby.html.5c93d604.js
rename to dist/assets/tabby.html.c3b44c08.js
index 4bd70409..acecfb26 100644
--- a/dist/assets/tabby.html.5c93d604.js
+++ b/dist/assets/tabby.html.c3b44c08.js
@@ -1 +1 @@
-import{_ as r}from"./plugin-vue_export-helper.21dcd24c.js";import{r as b,o as s,c as p,a as t,b as o,e as n,d as e}from"./app.a0271b9c.js";const c={},i=n('<p>\u4F5C\u4E3A\u4E00\u540D Java \u540E\u7AEF\u5F00\u53D1\uFF0C\u65E5\u5E38\u5DE5\u4F5C\u4E2D\u514D\u4E0D\u4E86\u8981\u548C Linux \u670D\u52A1\u5668\u6253\u4EA4\u9053\uFF0C\u56E0\u4E3A\u751F\u4EA7\u73AF\u5883\u57FA\u672C\u4E0A\u90FD\u662F\u90E8\u7F72\u5728 Linux \u73AF\u5883\u4E0B\u7684\u3002\u4EE5\u524D\u5462\uFF0C\u6211\u4F1A\u9009\u62E9 Xshell \u6765\u4F5C\u4E3A\u7EC8\u7AEF\u8FDB\u884C\u8FDC\u7A0B\u64CD\u4F5C\u3002</p><p>\u968F\u7740\u4ED8\u8D39\u7248\u672C\u7684\u51FA\u73B0\uFF0C\u5C24\u5176\u662F Xshell \u628A FTP \u5206\u79BB\u51FA\u53BB\u540E\uFF0C\u4E0A\u4F20\u4E0B\u8F7D\u6587\u4EF6\u7684\u8BDD\u8FD8\u9700\u8981\u5355\u72EC\u88C5\u4E00\u4E0B Xftp\uFF0C\u8FD9\u663E\u7136\u6CA1\u6709\u4E4B\u524D\u96C6\u6210\u5728\u4E00\u8D77\u65B9\u4FBF\u{1F616}\u3002</p><p>\u8FD8\u6709\u4E00\u70B9\u8BA9\u6211\u8D39\u89E3\u7684\u662F\uFF0CXshell \u7ADF\u7136\u4E00\u76F4\u6CA1\u6709\u63A8\u51FA macOS \u7248\u3002</p><p>\u4E0D\u8FC7\uFF0C\u6EF4\u6C34\u4E4B\u6069\u5F53\u6D8C\u6CC9\u76F8\u62A5\uFF0C\u6211\u8FD8\u662F\u8981\u8BF4\uFF0CXshell \u771F\u7684\u662F\u975E\u5E38\u7684 Nice\uFF0C\u4ECE\u5B9E\u4E60\u5230\u73B0\u5728\uFF0CWindows \u73AF\u5883\u4E0B\uFF0C\u6211\u57FA\u672C\u4E0A\u4E00\u76F4\u5728\u7528\uFF0C\u5DEE\u4E0D\u591A\u6709\u5FEB 10 \u5E74\u7684\u65F6\u95F4\u4E86\uFF0C\u611F\u60C5\u8FD8\u662F\u5728\u7684\u3002</p><p>\u76F8\u4FE1\u5F88\u591A\u5C0F\u4F19\u4F34\u4E5F\u5728\u95EE\uFF0C\u6709\u6CA1\u6709\u4E00\u6B3E\uFF0C<strong>\u96C6\u6210\u4E86 FTP \u529F\u80FD\uFF0C\u5E76\u4E14\u8DE8\u5E73\u53F0\u7684\u7EC8\u7AEF\u5DE5\u5177\u5462\uFF1F\u5982\u679C\u80FD\u514D\u8D39\u5F00\u6E90\u7684\u8BDD\uFF0C\u5C31\u66F4\u597D\u4E86</strong>\uFF01</p><p>\u7B54\u6848\u662F\u6709\u7684\uFF0C\u5B83\u5C31\u662F <strong>Tabby</strong>\uFF01</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/tabby-01.png" alt=""></p><p>GitHub \u4E0A\u5DF2\u7ECF\u6709 21.4k \u7684 star \u4E86\uFF0C\u8FD9\u8BF4\u660E Tabby \u975E\u5E38\u7684\u53D7\u6B22\u8FCE\uFF1A</p>',8),l={href:"https://github.com/eugeny/tabby",target:"_blank",rel:"noopener noreferrer"},h=e("https://github.com/eugeny/tabby"),g=t("p",null,[t("em",null,"Tabby\uFF1A\u4E8C\u54E5\uFF0C\u6211\u8C22\u8C22\u4F60\u5440\uFF0C\u80FD\u518D\u5439\u4E24\u53E5\u5417\uFF1F")],-1),_=t("p",null,"Tabby \u662F\u4E00\u4E2A\u9AD8\u5EA6\u53EF\u5B9A\u5236\u5316\u7684 \u8DE8\u5E73\u53F0\u7684\u7EC8\u7AEF\u5DE5\u5177\uFF0C\u652F\u6301 Windows\u3001macOS \u548C Linux\uFF0C\u81EA\u5E26 SFTP \u529F\u80FD\uFF0C\u80FD\u4E0E Linux \u670D\u52A1\u5668\u8F7B\u677E\u4F20\u8F93\u6587\u4EF6\uFF0C\u652F\u6301\u591A\u79CD\u4E3B\u9898\uFF0C\u754C\u9762\u70AB\u9177\uFF0C\u63D2\u4EF6\u4E30\u5BCC\u3002",-1),d=t("h3",{id:"\u4E00\u3001\u5B89\u88C5-tabby",tabindex:"-1"},[t("a",{class:"header-anchor",href:"#\u4E00\u3001\u5B89\u88C5-tabby","aria-hidden":"true"},"#"),e(" \u4E00\u3001\u5B89\u88C5 Tabby")],-1),m=e("\u76F4\u63A5\u5230\u5B98\u7F51 "),u={href:"https://tabby.sh/",target:"_blank",rel:"noopener noreferrer"},j=e("tabby.sh"),y=e(" \u70B9\u51FB\u300Cdownload\u300D\u6309\u94AE\u5C31\u53EF\u4EE5\u8DF3\u8F6C\u5230\u4E0B\u8F7D\u9875\u9762\uFF0C\u6700\u65B0\u7684 release \u7248\u672C\u662F 1.0.164\u3002"),v=t("p",null,[t("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/tabby-02.png",alt:""})],-1),f=t("p",null,"Linux \u548C Windows \u7684\u6BD4\u8F83\u597D\u9009\uFF0CmacOS \u5206\u4E3A\u4E24\u4E2A\u7248\u672C\uFF0C\u4E00\u4E2A\u662F arm64\uFF0C\u4E00\u4E2A\u662F x86-64\uFF0C\u4EC0\u4E48\u610F\u601D\u5462\uFF1F",-1),k=t("p",null,"\u8FD9\u91CC\u7B80\u5355\u666E\u53CA\u4E0B\u54C8\u3002",-1),S=t("blockquote",null,[t("p",null,"ARM\u662F\u82F1\u56FDARM\u516C\u53F8\u63D0\u4F9B\u4E00\u79CDCPU\u67B6\u6784\u7684\u77E5\u8BC6\u4EA7\u6743\uFF0C\u76EE\u524D\u4E3B\u6D41\u7684\u624B\u673A\u548C\u5E73\u677F\u7535\u8111\u90FD\u91C7\u7528ARM\u67B6\u6784\uFF0C\u4F46 ARM \u4E0D\u751F\u4EA7\u82AF\u7247\uFF0C\u53EA\u662F\u4ECE\u5404\u79CD\u5D4C\u5165\u5F0F\u8BBE\u5907\u3001\u667A\u80FD\u624B\u673A\u3001\u5E73\u677F\u7535\u8111\u3001\u667A\u80FD\u7A7F\u6234\u548C\u7269\u8054\u7F51\u8BBE\u5907\u4F53\u5185\u7684\u4E0A\u4EBF\u9897\u5904\u7406\u5668\u4E2D\u201C\u62BD\u6210\u201D\u3002")],-1),T=t("p",null,"Apple M1 \u662F\u82F9\u679C\u516C\u53F8\u7684\u7B2C\u4E00\u6B3E\u57FA\u4E8EARM\u67B6\u6784\u7684\u81EA\u7814\u5904\u7406\u5668\u5355\u7247\u7CFB\u7EDF\u3002",-1),x=t("blockquote",null,[t("p",null,"X86_X64 \u6E90\u4E8E\u82F1\u7279\u5C14\u51E0\u5341\u5E74\u524D\u51FA\u54C1\u7684CPU\u578B\u53F78086\uFF0C\u5305\u62EC\u540E\u7EED\u578B\u53F78088/80286/80386/80486/80586\u7B49\u7B49\uFF0C8086\u4EE5\u53CA8088\u88AB\u5F53\u65F6\u7684IBM\u91C7\u7528\uFF0C\u5236\u9020\u51FA\u4E86\u540D\u566A\u4E00\u65F6\u7684IBM PC\u673A\uFF0C\u4ECE\u6B64\u4E2A\u4EBA\u7535\u8111\u98CE\u9761\u4E00\u65F6\u3002")],-1),w=t("p",null,"\u8BE6\u60C5\u53EF\u53C2\u9605\u4E0B\u9762\u8FD9\u7BC7\uFF1A",-1),P={href:"https://www.cnblogs.com/zhaoqingqing/p/13145115.html",target:"_blank",rel:"noopener noreferrer"},q=e("https://www.cnblogs.com/zhaoqingqing/p/13145115.html"),L=t("p",null,"\u4ECE\u8FD9\u4E00\u70B9\u4E0A\u53EF\u4EE5\u8BC1\u660E\uFF0CTabby \u7684\u66F4\u65B0\u662F\u975E\u5E38\u52E4\u5FEB\u7684\uFF0C\u8FDE macOS \u7684\u6700\u65B0\u82AF\u7247 M1 \u90FD\u652F\u6301\u4E86\uFF0C\u5389\u5BB3\u4E86\u5440\uFF0C\u6211\u7684\u864E\u6591\u732B\uFF08Tabby\uFF09\uFF01",-1),G=t("p",null,"\u6309\u7167\u63D0\u793A\uFF0C\u4E00\u6B65\u6B65\u5B89\u88C5\u5C31 OK \u4E86\u3002\u5B8C\u6210\u540E\u6253\u5F00\uFF0C\u8FD9\u754C\u9762\u8FD8\u662F\u975E\u5E38\u70AB\u9177\u7684\u3002",-1),M=t("p",null,[t("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/tabby-03.png",alt:""})],-1),A=t("h2",{id:"\u4E8C\u3001ssh-\u8FDE\u63A5",tabindex:"-1"},[t("a",{class:"header-anchor",href:"#\u4E8C\u3001ssh-\u8FDE\u63A5","aria-hidden":"true"},"#"),e(" \u4E8C\u3001SSH \u8FDE\u63A5")],-1),X=t("p",null,"SSH\uFF0C\u4E5F\u5C31\u662F Secure Shell\uFF08\u5B89\u5168\u5916\u58F3\u534F\u8BAE\uFF09\uFF0C\u662F\u4E00\u79CD\u52A0\u5BC6\u7684\u7F51\u7EDC\u4F20\u8F93\u534F\u8BAE\uFF0C\u53EF\u5728\u4E0D\u5B89\u5168\u7684\u7F51\u7EDC\u4E2D\u4E3A\u7F51\u7EDC\u670D\u52A1\u63D0\u4F9B\u5B89\u5168\u7684\u4F20\u8F93\u73AF\u5883\uFF0C\u901A\u8FC7\u5728\u7F51\u7EDC\u4E2D\u521B\u5EFA\u5B89\u5168\u96A7\u9053\u6765\u5B9E\u73B0 SSH \u5BA2\u6237\u7AEF\u548C\u670D\u52A1\u5668\u7AEF\u4E4B\u95F4\u7684\u8FDE\u63A5\u3002",-1),F=e("\u4E4B\u524D\u8BF4\u8981\u5E26\u5927\u5BB6\u73A9\u8F6C Linux \u670D\u52A1\u5668\uFF0C\u6211\u4EEC\u5148\u5B89\u88C5\u4E86"),H={href:"https://mp.weixin.qq.com/s/ditN9J80rSWwnYRumwb4ww",target:"_blank",rel:"noopener noreferrer"},O=e("\u5B9D\u5854\u9762\u677F"),R=e("\u8FD9\u4E2A\u795E\u5668\u3002\u5B9D\u5854\u91CC\u9762\u6709\u81EA\u5E26\u7684\u7EC8\u7AEF\uFF0C\u4F46\u8BF4\u5B9E\u8BDD\uFF0C\u4F53\u9A8C\u4E00\u822C\u3002"),W=n('<p>\u90A3\u4E0D\u59A8\u6211\u4EEC\u5C31\u4F7F\u7528 Tabby 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src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/tabby-15.png" alt=""></p><p>\u8FD9\u91CC\u4EE5 Gitee \u4E3A\u4F8B\uFF0C\u8FDB\u5165\u4E2A\u4EBA Gitee \u4E3B\u9875\uFF0C\u5DE6\u4FA7\u83DC\u5355\u4E2D\u9009\u62E9\u300C\u79C1\u4EBA\u4EE4\u724C\u300D\uFF0C\u7136\u540E\u70B9\u51FB\u300C\u751F\u6210\u65B0\u4EE4\u724C\u300D\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/tabby-16.png" alt=""></p><p>\u63D0\u4EA4\u540E\u4F1A\u751F\u6210 token\uFF0C\u590D\u5236\u5230 Tabby \u7684 Token \u8F93\u5165\u6846\u4E2D\uFF0C\u7136\u540E\u70B9\u51FB\u300CUpload config\u300D\uFF0C\u5C31\u53EF\u4EE5\u770B\u5230\u914D\u7F6E\u4FE1\u606F\u540C\u6B65\u6210\u529F\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/tabby-17.png" alt=""></p><p>\u300CWindow\u300D \u83DC\u5355\u4E2D\u53EF\u4EE5\u5BF9\u5F53\u524D\u7A97\u53E3\u8FDB\u884C\u8BBE\u7F6E\uFF0C\u6BD4\u5982\u8BF4\u6539\u53D8\u7A97\u53E3\u7684\u4E3B\u9898\u4E3A 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\u5FEB\u901F\u5411\u4E00\u4E2A\u6216\u6240\u6709\u7EC8\u7AEF\u9009\u9879\u5361\u53D1\u9001\u547D\u4EE4"),Q={href:"https://github.com/Eugeny/tabby-save-output",target:"_blank",rel:"noopener noreferrer"},Z=e("save-output"),$=e("\xA0- \u5C06\u7EC8\u7AEF\u8F93\u51FA\u8BB0\u5F55\u5230\u6587\u4EF6\u4E2D"),tt=n('<p>\u8FD9\u91CC\u91CD\u70B9\u8BF4\u4E00\u4E0B\u300Csync config\u300D \u8FD9\u4E2A\u63D2\u4EF6\uFF0C\u53EF\u4EE5\u5C06\u914D\u7F6E\u540C\u6B65\u5230Github\u6216\u8005Gitee\u7684\u63D2\u4EF6\u3002\u70B9\u51FB\u300CGet\u300D\u5C31\u53EF\u4EE5\u5B89\u88C5\uFF0C\u4E4B\u540E\u4F1A\u63D0\u793A\u4F60\u91CD\u542F\u751F\u6548\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/tabby-14.png" alt=""></p><p>\u751F\u6548\u540E\u70B9\u51FB\u300CSync Config\u300D\u83DC\u5355\uFF0C\u5C31\u53EF\u4EE5\u770B\u5230\u914D\u7F6E\u9879\u4E86\uFF0C\u7C7B\u578B\u53EF\u4EE5\u9009\u62E9 GitHub\u3001Gitee\u3001GitLab\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/tabby-15.png" alt=""></p><p>\u8FD9\u91CC\u4EE5 Gitee \u4E3A\u4F8B\uFF0C\u8FDB\u5165\u4E2A\u4EBA Gitee \u4E3B\u9875\uFF0C\u5DE6\u4FA7\u83DC\u5355\u4E2D\u9009\u62E9\u300C\u79C1\u4EBA\u4EE4\u724C\u300D\uFF0C\u7136\u540E\u70B9\u51FB\u300C\u751F\u6210\u65B0\u4EE4\u724C\u300D\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/tabby-16.png" alt=""></p><p>\u63D0\u4EA4\u540E\u4F1A\u751F\u6210 token\uFF0C\u590D\u5236\u5230 Tabby \u7684 Token \u8F93\u5165\u6846\u4E2D\uFF0C\u7136\u540E\u70B9\u51FB\u300CUpload config\u300D\uFF0C\u5C31\u53EF\u4EE5\u770B\u5230\u914D\u7F6E\u4FE1\u606F\u540C\u6B65\u6210\u529F\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/tabby-17.png" alt=""></p><p>\u300CWindow\u300D \u83DC\u5355\u4E2D\u53EF\u4EE5\u5BF9\u5F53\u524D\u7A97\u53E3\u8FDB\u884C\u8BBE\u7F6E\uFF0C\u6BD4\u5982\u8BF4\u6539\u53D8\u7A97\u53E3\u7684\u4E3B\u9898\u4E3A Paper\uFF0C\u6539\u53D8 tab \u7684\u4F4D\u7F6E\u5230\u5E95\u90E8\u7B49\u7B49\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/tabby-18.png" alt=""></p><h3 id="\u4E94\u3001\u603B\u7ED3" tabindex="-1"><a class="header-anchor" href="#\u4E94\u3001\u603B\u7ED3" aria-hidden="true">#</a> \u4E94\u3001\u603B\u7ED3</h3><p>SSH \u8FDE\u63A5\u548C SFTP \u4F20\u8F93\u6050\u6015\u662F\u6211\u4EEC\u64CD\u4F5C Linux \u670D\u52A1\u5668\u6700\u5E38\u7528\u7684\u4E24\u4E2A\u529F\u80FD\u4E86\uFF0C\u90A3 Tabby \u5BF9\u8FD9\u4E24\u4E2A\u529F\u80FD\u7684\u652F\u6301\u975E\u5E38\u7684\u53CB\u597D\uFF0C\u8DB3\u591F\u7684\u8F7B\u91CF\u7EA7\u3002\u5173\u952E\u5B83\u662F\u8DE8\u5E73\u53F0\u7684\uFF0CWindows\u3001macOS \u90FD\u53EF\u4EE5\u7528\uFF0C\u518D\u628A\u914D\u7F6E\u4FE1\u606F\u540C\u6B65\u5230\u4E91\u4E0A\u540E\uFF0C\u591A\u5E73\u53F0\u4E0B\u5207\u6362\u8D77\u6765\u7B80\u76F4\u4E0D\u8981\u592A\u8212\u670D\u3002</p><p>Windows \u7528\u6237\u4E60\u60EF\u7528 Xshell\uFF0CmacOS \u7528\u6237\u4E60\u60EF\u7528 iTerm2\uFF0C\u4F46\u8FD9\u4E24\u6B3E\u5DE5\u5177\u90FD\u6CA1\u529E\u6CD5\u8DE8\u5E73\u53F0\uFF0C\u591A\u5E73\u53F0\u64CD\u4F5C\u7684\u7528\u6237\u5C31\u53EF\u4EE5\u9009\u62E9 Tabby \u6765\u4F53\u9A8C\u4E00\u4E0B\uFF0C\u771F\u5FC3\u4E0D\u9519\u3002</p><p>Tabby \u7684\u5B66\u4E60\u8D44\u6599\u8FD8\u6BD4\u8F83\u5C11\uFF0C\u6240\u4EE5\u5E0C\u671B\u4E8C\u54E5\u7684\u8FD9\u7BC7\u6587\u7AE0\u80FD\u7ED9\u6709\u9700\u8981\u7684\u5C0F\u4F19\u4F34\u63D0\u4F9B\u4E00\u70B9\u70B9\u7684\u5E2E\u52A9\u548C\u542F\u53D1\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p>',15);function et(at,ot){const a=b("ExternalLinkIcon");return s(),p("div",null,[i,t("blockquote",null,[t("p",null,[t("a",l,[h,o(a)])])]),g,_,d,t("p",null,[m,t("a",u,[j,o(a)]),y]),v,f,k,S,T,x,w,t("blockquote",null,[t("p",null,[t("a",P,[q,o(a)])])]),L,G,M,A,X,t("p",null,[F,t("a",H,[O,o(a)]),R]),W,t("ul",null,[t("li",null,[t("a",E,[N,o(a)]),B]),t("li",null,[t("a",C,[I,o(a)]),U]),t("li",null,[t("a",V,[z,o(a)]),D]),t("li",null,[t("a",J,[K,o(a)]),Y]),t("li",null,[t("a",Q,[Z,o(a)]),$])]),tt])}var bt=r(c,[["render",et],["__file","tabby.html.vue"]]);export{bt as default};
diff --git a/dist/assets/this-super.html.5e8e4dee.js b/dist/assets/this-super.html.ff84e809.js
similarity index 99%
rename from dist/assets/this-super.html.5e8e4dee.js
rename to dist/assets/this-super.html.ff84e809.js
index bb4dbfee..a3249feb 100644
--- a/dist/assets/this-super.html.5e8e4dee.js
+++ b/dist/assets/this-super.html.ff84e809.js
@@ -1,4 +1,4 @@
-import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e as p}from"./app.a0271b9c.js";const t={},e=p(`<h1 id="java\u4E2Dthis\u548Csuper\u7684\u7528\u6CD5\u603B\u7ED3" tabindex="-1"><a class="header-anchor" href="#java\u4E2Dthis\u548Csuper\u7684\u7528\u6CD5\u603B\u7ED3" aria-hidden="true">#</a> Java\u4E2Dthis\u548Csuper\u7684\u7528\u6CD5\u603B\u7ED3</h1><p>\u201C\u54E5\uFF0C\u88AB\u558A\u5927\u8205\u5B50\u7684\u611F\u89C9\u600E\u4E48\u6837\u554A\uFF1F\u201D\u4E09\u59B9\u4E0D\u6000\u597D\u610F\u5730\u5BF9\u6211\u8BF4\uFF0C\u5979\u773C\u775B\u91CC\u5145\u6EE1\u7740\u4E0D\u5C51\u3002</p><p>\u201C\u8BF4\u5B9E\u8BDD\uFF0C\u8FD9\u79CD\u611F\u89C9\u8FD8\u4E0D\u9519\u3002\u201D\u6211\u6709\u70B9\u96BE\u4E3A\u60C5\u7684\u56DE\u7B54\u5979\uFF0C\u201C\u4E0D\u8FC7\uFF0C\u6709\u4E00\u70B9\u4EE4\u6211\u611F\u5230\u4E9B\u8BB8\u5931\u843D\u3002\u5927\u5BB6\u7684\u7126\u70B9\u4F3C\u4E4E\u90FD\u662F\u4F60\u7684\u989C\u503C\uFF0C\u5B8C\u5168\u5FFD\u7565\u4E86\u6211\u7684\u76DB\u4E16\u7F8E\u989C\u554A\uFF01\u201D</p><p>\u201C\u54E5\uFF0C\u4F60\u60F3\u5565\u5462\uFF0C\u90A3\u662F\u56E0\u4E3A\u4F60\u6587\u7AE0\u5199\u5F97\u597D\uFF0C\u4E0D\u7136\u8C01\u8BA4\u8BC6\u6211\u662F\u8C01\u554A\uFF01\u6709\u4F60\u8FD9\u6837\u7684\u54E5\u54E5\uFF0C\u6211\u8FD8\u662F\u633A\u81EA\u8C6A\u7684\u3002\u201D\u4E09\u59B9\u90D1\u91CD\u5176\u4E8B\u5730\u8BF4\uFF0C\u201C\u8BDD\u8BF4\u4ECA\u5929\u54B1\u5B66\u5565\u5462\uFF1F\u201D</p><p>\u201C\u4E09\u59B9\u554A\uFF0C\u4F60\u8FD9\u53E5\u8BDD\u8BF4\u5F97\u6211\u559C\u6B22\u3002\u4ECA\u5929\u6765\u5B66\u4E60\u4E00\u4E0B Java \u4E2D\u7684 this \u5173\u952E\u5B57\u5427\u3002\u201D\u559D\u4E86\u4E00\u53E3\u519C\u592B\u5C71\u6CC9\u540E\uFF0C\u6211\u5BF9\u4E09\u59B9\u8BF4\u3002</p><p>\u201Cthis \u5173\u952E\u5B57\u6709\u5F88\u591A\u79CD\u7528\u6CD5\uFF0C\u5176\u4E2D\u6700\u5E38\u7528\u7684\u4E00\u4E2A\u662F\uFF0C\u5B83\u53EF\u4EE5\u4F5C\u4E3A\u5F15\u7528\u53D8\u91CF\uFF0C\u6307\u5411\u5F53\u524D\u5BF9\u8C61\u3002\u201D\u6211\u9762\u5E26\u7740\u6734\u5B9E\u65E0\u534E\u7684\u5FAE\u7B11\u7EE7\u7EED\u8BF4\uFF0C\u201C\u9664\u6B64\u4E4B\u5916\uFF0C this \u5173\u952E\u5B57\u8FD8\u53EF\u4EE5\u5B8C\u6210\u4EE5\u4E0B\u5DE5\u4F5C\u3002\u201D</p><ul><li>\u8C03\u7528\u5F53\u524D\u7C7B\u7684\u65B9\u6CD5\uFF1B</li><li><code>this()</code> \u53EF\u4EE5\u8C03\u7528\u5F53\u524D\u7C7B\u7684\u6784\u9020\u65B9\u6CD5\uFF1B</li><li>this \u53EF\u4EE5\u4F5C\u4E3A\u53C2\u6570\u5728\u65B9\u6CD5\u4E2D\u4F20\u9012\uFF1B</li><li>this \u53EF\u4EE5\u4F5C\u4E3A\u53C2\u6570\u5728\u6784\u9020\u65B9\u6CD5\u4E2D\u4F20\u9012\uFF1B</li><li>this \u53EF\u4EE5\u4F5C\u4E3A\u65B9\u6CD5\u7684\u8FD4\u56DE\u503C\uFF0C\u8FD4\u56DE\u5F53\u524D\u7C7B\u7684\u5BF9\u8C61\u3002</li></ul><h3 id="_01\u3001-\u6307\u5411\u5F53\u524D\u5BF9\u8C61" tabindex="-1"><a class="header-anchor" href="#_01\u3001-\u6307\u5411\u5F53\u524D\u5BF9\u8C61" aria-hidden="true">#</a> 01\u3001 \u6307\u5411\u5F53\u524D\u5BF9\u8C61</h3><p>\u201C\u4E09\u59B9\uFF0C\u6765\u770B\u4E0B\u9762\u8FD9\u6BB5\u4EE3\u7801\u3002\u201D\u8BDD\u97F3\u521A\u843D\uFF0C\u6211\u5C31\u5728\u952E\u76D8\u4E0A\u567C\u91CC\u556A\u5566\u4E00\u9635\u6572\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">WithoutThisStudent</span> <span class="token punctuation">{</span>
+import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e as p}from"./app.615e41d8.js";const t={},e=p(`<h1 id="java\u4E2Dthis\u548Csuper\u7684\u7528\u6CD5\u603B\u7ED3" tabindex="-1"><a class="header-anchor" href="#java\u4E2Dthis\u548Csuper\u7684\u7528\u6CD5\u603B\u7ED3" aria-hidden="true">#</a> Java\u4E2Dthis\u548Csuper\u7684\u7528\u6CD5\u603B\u7ED3</h1><p>\u201C\u54E5\uFF0C\u88AB\u558A\u5927\u8205\u5B50\u7684\u611F\u89C9\u600E\u4E48\u6837\u554A\uFF1F\u201D\u4E09\u59B9\u4E0D\u6000\u597D\u610F\u5730\u5BF9\u6211\u8BF4\uFF0C\u5979\u773C\u775B\u91CC\u5145\u6EE1\u7740\u4E0D\u5C51\u3002</p><p>\u201C\u8BF4\u5B9E\u8BDD\uFF0C\u8FD9\u79CD\u611F\u89C9\u8FD8\u4E0D\u9519\u3002\u201D\u6211\u6709\u70B9\u96BE\u4E3A\u60C5\u7684\u56DE\u7B54\u5979\uFF0C\u201C\u4E0D\u8FC7\uFF0C\u6709\u4E00\u70B9\u4EE4\u6211\u611F\u5230\u4E9B\u8BB8\u5931\u843D\u3002\u5927\u5BB6\u7684\u7126\u70B9\u4F3C\u4E4E\u90FD\u662F\u4F60\u7684\u989C\u503C\uFF0C\u5B8C\u5168\u5FFD\u7565\u4E86\u6211\u7684\u76DB\u4E16\u7F8E\u989C\u554A\uFF01\u201D</p><p>\u201C\u54E5\uFF0C\u4F60\u60F3\u5565\u5462\uFF0C\u90A3\u662F\u56E0\u4E3A\u4F60\u6587\u7AE0\u5199\u5F97\u597D\uFF0C\u4E0D\u7136\u8C01\u8BA4\u8BC6\u6211\u662F\u8C01\u554A\uFF01\u6709\u4F60\u8FD9\u6837\u7684\u54E5\u54E5\uFF0C\u6211\u8FD8\u662F\u633A\u81EA\u8C6A\u7684\u3002\u201D\u4E09\u59B9\u90D1\u91CD\u5176\u4E8B\u5730\u8BF4\uFF0C\u201C\u8BDD\u8BF4\u4ECA\u5929\u54B1\u5B66\u5565\u5462\uFF1F\u201D</p><p>\u201C\u4E09\u59B9\u554A\uFF0C\u4F60\u8FD9\u53E5\u8BDD\u8BF4\u5F97\u6211\u559C\u6B22\u3002\u4ECA\u5929\u6765\u5B66\u4E60\u4E00\u4E0B Java \u4E2D\u7684 this \u5173\u952E\u5B57\u5427\u3002\u201D\u559D\u4E86\u4E00\u53E3\u519C\u592B\u5C71\u6CC9\u540E\uFF0C\u6211\u5BF9\u4E09\u59B9\u8BF4\u3002</p><p>\u201Cthis \u5173\u952E\u5B57\u6709\u5F88\u591A\u79CD\u7528\u6CD5\uFF0C\u5176\u4E2D\u6700\u5E38\u7528\u7684\u4E00\u4E2A\u662F\uFF0C\u5B83\u53EF\u4EE5\u4F5C\u4E3A\u5F15\u7528\u53D8\u91CF\uFF0C\u6307\u5411\u5F53\u524D\u5BF9\u8C61\u3002\u201D\u6211\u9762\u5E26\u7740\u6734\u5B9E\u65E0\u534E\u7684\u5FAE\u7B11\u7EE7\u7EED\u8BF4\uFF0C\u201C\u9664\u6B64\u4E4B\u5916\uFF0C this \u5173\u952E\u5B57\u8FD8\u53EF\u4EE5\u5B8C\u6210\u4EE5\u4E0B\u5DE5\u4F5C\u3002\u201D</p><ul><li>\u8C03\u7528\u5F53\u524D\u7C7B\u7684\u65B9\u6CD5\uFF1B</li><li><code>this()</code> \u53EF\u4EE5\u8C03\u7528\u5F53\u524D\u7C7B\u7684\u6784\u9020\u65B9\u6CD5\uFF1B</li><li>this \u53EF\u4EE5\u4F5C\u4E3A\u53C2\u6570\u5728\u65B9\u6CD5\u4E2D\u4F20\u9012\uFF1B</li><li>this \u53EF\u4EE5\u4F5C\u4E3A\u53C2\u6570\u5728\u6784\u9020\u65B9\u6CD5\u4E2D\u4F20\u9012\uFF1B</li><li>this \u53EF\u4EE5\u4F5C\u4E3A\u65B9\u6CD5\u7684\u8FD4\u56DE\u503C\uFF0C\u8FD4\u56DE\u5F53\u524D\u7C7B\u7684\u5BF9\u8C61\u3002</li></ul><h3 id="_01\u3001-\u6307\u5411\u5F53\u524D\u5BF9\u8C61" tabindex="-1"><a class="header-anchor" href="#_01\u3001-\u6307\u5411\u5F53\u524D\u5BF9\u8C61" aria-hidden="true">#</a> 01\u3001 \u6307\u5411\u5F53\u524D\u5BF9\u8C61</h3><p>\u201C\u4E09\u59B9\uFF0C\u6765\u770B\u4E0B\u9762\u8FD9\u6BB5\u4EE3\u7801\u3002\u201D\u8BDD\u97F3\u521A\u843D\uFF0C\u6211\u5C31\u5728\u952E\u76D8\u4E0A\u567C\u91CC\u556A\u5566\u4E00\u9635\u6572\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">WithoutThisStudent</span> <span class="token punctuation">{</span>
     <span class="token class-name">String</span> name<span class="token punctuation">;</span>
     <span class="token keyword">int</span> age<span class="token punctuation">;</span>
 
diff --git a/dist/assets/thread-bring-some-problem.html.b2f11eb4.js b/dist/assets/thread-bring-some-problem.html.891141f3.js
similarity index 99%
rename from dist/assets/thread-bring-some-problem.html.b2f11eb4.js
rename to dist/assets/thread-bring-some-problem.html.891141f3.js
index 9650e416..652889b0 100644
--- a/dist/assets/thread-bring-some-problem.html.b2f11eb4.js
+++ b/dist/assets/thread-bring-some-problem.html.891141f3.js
@@ -1,4 +1,4 @@
-import{_ as t}from"./plugin-vue_export-helper.21dcd24c.js";import{r as o,o as p,c as r,a as e,b as n,e as c,d as s}from"./app.a0271b9c.js";const i={},l=c(`<h1 id="\u5E76\u53D1\u7F16\u7A0B\u5E26\u6765\u4E86\u54EA\u4E9B\u95EE\u9898" tabindex="-1"><a class="header-anchor" href="#\u5E76\u53D1\u7F16\u7A0B\u5E26\u6765\u4E86\u54EA\u4E9B\u95EE\u9898" aria-hidden="true">#</a> \u5E76\u53D1\u7F16\u7A0B\u5E26\u6765\u4E86\u54EA\u4E9B\u95EE\u9898\uFF1F</h1><p>\u591A\u7EBF\u7A0B\u6280\u672F\u6709\u8FD9\u4E48\u591A\u7684\u597D\u5904\uFF0C\u96BE\u9053\u5C31\u6CA1\u6709\u4E00\u70B9\u7F3A\u70B9\u4E48\uFF0C\u5C31\u5728\u4EFB\u4F55\u573A\u666F\u4E0B\u5C31\u4E00\u5B9A\u9002\u7528\u4E48\uFF1F\u5F88\u663E\u7136\u4E0D\u662F\u3002</p><p>\u5728\u5B9E\u9645\u5DE5\u4F5C\u4E2D\uFF0C\u9519\u8BEF\u4F7F\u7528\u591A\u7EBF\u7A0B\u975E\u4F46\u4E0D\u80FD\u63D0\u9AD8\u6548\u7387\u8FD8\u53EF\u80FD\u4F7F\u7A0B\u5E8F\u5D29\u6E83\u3002\u4EE5\u5728\u8DEF\u4E0A\u5F00\u8F66\u4E3A\u4F8B\uFF1A</p><p>\u5728\u4E00\u4E2A\u5355\u5411\u884C\u9A76\u7684\u9053\u8DEF\u4E0A\uFF0C\u6BCF\u8F86\u6C7D\u8F66\u90FD\u9075\u5B88\u4EA4\u901A\u89C4\u5219\uFF0C\u8FD9\u65F6\u5019\u6574\u4F53\u901A\u884C\u662F\u6B63\u5E38\u7684\u3002\u300E\u5355\u5411\u8F66\u9053\u300F\u610F\u5473\u7740\u300E\u4E00\u4E2A\u7EBF\u7A0B\u300F\uFF0C\u300E\u591A\u8F86\u8F66\u300F\u610F\u5473\u7740\u300E\u591A\u4E2Ajob\u4EFB\u52A1\u300F\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/thread-bring-some-problem-c0a03b79-36d8-4120-888e-0597aa66ca5b.png" alt="\u5355\u7EBF\u7A0B\u987A\u5229\u540C\u884C"></p><p>\u5982\u679C\u9700\u8981\u63D0\u5347\u8F66\u8F86\u7684\u540C\u884C\u6548\u7387\uFF0C\u4E00\u822C\u7684\u505A\u6CD5\u5C31\u662F\u6269\u5C55\u8F66\u9053\uFF0C\u5BF9\u5E94\u7A0B\u5E8F\u6765\u8BF4\u5C31\u662F\u300E\u52A0\u7EBF\u7A0B\u6C60\u300F\uFF0C\u589E\u52A0\u7EBF\u7A0B\u6570\u3002\u8FD9\u6837\u5728\u540C\u4E00\u65F6\u95F4\u5185\uFF0C\u901A\u884C\u7684\u8F66\u8F86\u6570\u8FDC\u8FDC\u5927\u4E8E\u5355\u8F66\u9053\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/thread-bring-some-problem-a65346bc-7b8b-4883-9d85-d07859df2e69.png" alt="\u591A\u7EBF\u7A0B\u987A\u5229\u540C\u884C"></p><p>\u7136\u800C\u6210\u5E74\u4EBA\u7684\u4E16\u754C\u6CA1\u6709\u90A3\u4E48\u5B8C\u7F8E\uFF0C\u8F66\u9053\u4E00\u65E6\u591A\u8D77\u6765\u300E\u52A0\u585E\u300F\u7684\u573A\u666F\u5C31\u4F1A\u8D8A\u6765\u8D8A\u591A\uFF0C\u51FA\u73B0\u78B0\u649E\u540E\u4E5F\u4F1A\u5F71\u54CD\u6574\u6761\u9A6C\u8DEF\u7684\u901A\u884C\u6548\u7387\u3002\u8FD9\u4E48\u4E00\u5BF9\u6BD4\u4E0B\u6765\u300E\u591A\u8F66\u9053\u300F\u786E\u5B9E\u53EF\u80FD\u6BD4\u300E\u5355\u8F66\u9053\u300F\u8981\u6162\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/thread-bring-some-problem-532930da-03fe-4a59-aee8-0b97b5f1a966.png" alt="\u591A\u7EBF\u7A0B\u6545\u969C"></p><p>\u9632\u6B62\u6C7D\u8F66\u9891\u7E41\u53D8\u9053\u52A0\u585E\u53EF\u4EE5\u91C7\u53D6\u5728\u8F66\u9053\u95F4\u589E\u52A0\u300E\u62A4\u680F\u300F\uFF0C\u90A3\u5728\u7A0B\u5E8F\u7684\u4E16\u754C\u8BE5\u600E\u4E48\u505A\u5462\uFF1F</p><p>\u7A0B\u5E8F\u4E16\u754C\u4E2D\u591A\u7EBF\u7A0B\u9047\u5230\u7684\u95EE\u9898\u5F52\u7EB3\u8D77\u6765\u5C31\u662F\u4E09\u7C7B\uFF1A<code>\u300E\u7EBF\u7A0B\u5B89\u5168\u95EE\u9898\u300F</code>\u3001<code>\u300E\u6D3B\u8DC3\u6027\u95EE\u9898\u300F</code>\u3001<code>\u300E\u6027\u80FD\u95EE\u9898\u300F</code>\uFF0C\u63A5\u4E0B\u6765\u4F1A\u8BB2\u89E3\u8FD9\u4E9B\u95EE\u9898\uFF0C\u4EE5\u53CA\u95EE\u9898\u5BF9\u5E94\u7684\u89E3\u51B3\u624B\u6BB5\u3002</p><h2 id="\u7EBF\u7A0B\u5B89\u5168\u95EE\u9898" tabindex="-1"><a class="header-anchor" href="#\u7EBF\u7A0B\u5B89\u5168\u95EE\u9898" aria-hidden="true">#</a> \u7EBF\u7A0B\u5B89\u5168\u95EE\u9898</h2><p>\u6709\u65F6\u5019\u6211\u4EEC\u4F1A\u53D1\u73B0\uFF0C\u660E\u660E\u5728\u5355\u7EBF\u7A0B\u73AF\u5883\u4E2D\u6B63\u5E38\u8FD0\u884C\u7684\u4EE3\u7801\uFF0C\u5728\u591A\u7EBF\u7A0B\u73AF\u5883\u4E2D\u53EF\u80FD\u4F1A\u51FA\u73B0\u610F\u6599\u4E4B\u5916\u7684\u7ED3\u679C\uFF0C\u5176\u5B9E\u8FD9\u5C31\u662F\u5927\u5BB6\u5E38\u8BF4\u7684\u300E\u7EBF\u7A0B\u4E0D\u5B89\u5168\u300F\u3002\u90A3\u5230\u5E95\u4EC0\u4E48\u662F\u7EBF\u7A0B\u4E0D\u5B89\u5168\u5462\uFF1F\u5F80\u4E0B\u770B\u3002</p><p><strong>\u539F\u5B50\u6027</strong></p><p>\u4E3E\u4E00\u4E2A\u94F6\u884C\u8F6C\u8D26\u7684\u4F8B\u5B50\uFF0C\u6BD4\u5982\u4ECE\u8D26\u6237A\u5411\u8D26\u6237B\u8F6C1000\u5143\uFF0C\u90A3\u4E48\u5FC5\u7136\u5305\u62EC2\u4E2A\u64CD\u4F5C\uFF1A\u4ECE\u8D26\u6237A\u51CF\u53BB1000\u5143\uFF0C\u5F80\u8D26\u6237B\u52A0\u4E0A1000\u5143\uFF0C\u4E24\u4E2A\u64CD\u4F5C\u90FD\u6210\u529F\u624D\u610F\u5473\u7740\u4E00\u6B21\u8F6C\u8D26\u6700\u7EC8\u6210\u529F\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/thread-bring-some-problem-eba43c92-e42d-4318-a40c-b9365c32d922.png" alt=""></p><p>\u8BD5\u60F3\u4E00\u4E0B\uFF0C\u5982\u679C\u8FD9\u4E24\u4E2A\u64CD\u4F5C\u4E0D\u5177\u5907\u539F\u5B50\u6027\uFF0C\u4ECEA\u7684\u8D26\u6237\u6263\u51CF\u4E861000\u5143\u4E4B\u540E\uFF0C\u64CD\u4F5C\u7A81\u7136\u7EC8\u6B62\u4E86\uFF0C\u8D26\u6237B\u6CA1\u6709\u589E\u52A01000\u5143\uFF0C\u90A3\u95EE\u9898\u5C31\u5927\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/thread-bring-some-problem-c22ae9be-bd80-4613-9c7e-3feb83c6c83f.png" alt=""></p><p>\u94F6\u884C\u8F6C\u8D26\u8FD9\u4E2A\u4F8B\u5B50\u6709\u4E24\u4E2A\u6B65\u9AA4\uFF0C\u51FA\u73B0\u4E86\u610F\u5916\u540E\u5BFC\u81F4\u8F6C\u8D26\u5931\u8D25\uFF0C\u8BF4\u660E\u6CA1\u6709\u539F\u5B50\u6027\u3002</p><blockquote><p>\u539F\u5B50\u6027\uFF1A\u5373\u4E00\u4E2A\u64CD\u4F5C\u6216\u8005\u591A\u4E2A\u64CD\u4F5C \u8981\u4E48\u5168\u90E8\u6267\u884C\u5E76\u4E14\u6267\u884C\u7684\u8FC7\u7A0B\u4E0D\u4F1A\u88AB\u4EFB\u4F55\u56E0\u7D20\u6253\u65AD\uFF0C\u8981\u4E48\u5C31\u90FD\u4E0D\u6267\u884C\u3002</p><p>\u539F\u5B50\u64CD\u4F5C\uFF1A\u5373\u4E0D\u4F1A\u88AB\u7EBF\u7A0B\u8C03\u5EA6\u673A\u5236\u6253\u65AD\u7684\u64CD\u4F5C\uFF0C\u6CA1\u6709\u4E0A\u4E0B\u6587\u5207\u6362\u3002</p></blockquote><p>\u5728\u5E76\u53D1\u7F16\u7A0B\u4E2D\u5F88\u591A\u64CD\u4F5C\u90FD\u4E0D\u662F\u539F\u5B50\u64CD\u4F5C\uFF0C\u51FA\u4E2A\u5C0F\u9898\u76EE\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code>i <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span> <span class="token comment">// \u64CD\u4F5C1</span>
+import{_ as t}from"./plugin-vue_export-helper.21dcd24c.js";import{r as o,o as p,c as r,a as e,b as n,e as c,d as s}from"./app.615e41d8.js";const i={},l=c(`<h1 id="\u5E76\u53D1\u7F16\u7A0B\u5E26\u6765\u4E86\u54EA\u4E9B\u95EE\u9898" tabindex="-1"><a class="header-anchor" href="#\u5E76\u53D1\u7F16\u7A0B\u5E26\u6765\u4E86\u54EA\u4E9B\u95EE\u9898" aria-hidden="true">#</a> \u5E76\u53D1\u7F16\u7A0B\u5E26\u6765\u4E86\u54EA\u4E9B\u95EE\u9898\uFF1F</h1><p>\u591A\u7EBF\u7A0B\u6280\u672F\u6709\u8FD9\u4E48\u591A\u7684\u597D\u5904\uFF0C\u96BE\u9053\u5C31\u6CA1\u6709\u4E00\u70B9\u7F3A\u70B9\u4E48\uFF0C\u5C31\u5728\u4EFB\u4F55\u573A\u666F\u4E0B\u5C31\u4E00\u5B9A\u9002\u7528\u4E48\uFF1F\u5F88\u663E\u7136\u4E0D\u662F\u3002</p><p>\u5728\u5B9E\u9645\u5DE5\u4F5C\u4E2D\uFF0C\u9519\u8BEF\u4F7F\u7528\u591A\u7EBF\u7A0B\u975E\u4F46\u4E0D\u80FD\u63D0\u9AD8\u6548\u7387\u8FD8\u53EF\u80FD\u4F7F\u7A0B\u5E8F\u5D29\u6E83\u3002\u4EE5\u5728\u8DEF\u4E0A\u5F00\u8F66\u4E3A\u4F8B\uFF1A</p><p>\u5728\u4E00\u4E2A\u5355\u5411\u884C\u9A76\u7684\u9053\u8DEF\u4E0A\uFF0C\u6BCF\u8F86\u6C7D\u8F66\u90FD\u9075\u5B88\u4EA4\u901A\u89C4\u5219\uFF0C\u8FD9\u65F6\u5019\u6574\u4F53\u901A\u884C\u662F\u6B63\u5E38\u7684\u3002\u300E\u5355\u5411\u8F66\u9053\u300F\u610F\u5473\u7740\u300E\u4E00\u4E2A\u7EBF\u7A0B\u300F\uFF0C\u300E\u591A\u8F86\u8F66\u300F\u610F\u5473\u7740\u300E\u591A\u4E2Ajob\u4EFB\u52A1\u300F\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/thread-bring-some-problem-c0a03b79-36d8-4120-888e-0597aa66ca5b.png" alt="\u5355\u7EBF\u7A0B\u987A\u5229\u540C\u884C"></p><p>\u5982\u679C\u9700\u8981\u63D0\u5347\u8F66\u8F86\u7684\u540C\u884C\u6548\u7387\uFF0C\u4E00\u822C\u7684\u505A\u6CD5\u5C31\u662F\u6269\u5C55\u8F66\u9053\uFF0C\u5BF9\u5E94\u7A0B\u5E8F\u6765\u8BF4\u5C31\u662F\u300E\u52A0\u7EBF\u7A0B\u6C60\u300F\uFF0C\u589E\u52A0\u7EBF\u7A0B\u6570\u3002\u8FD9\u6837\u5728\u540C\u4E00\u65F6\u95F4\u5185\uFF0C\u901A\u884C\u7684\u8F66\u8F86\u6570\u8FDC\u8FDC\u5927\u4E8E\u5355\u8F66\u9053\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/thread-bring-some-problem-a65346bc-7b8b-4883-9d85-d07859df2e69.png" alt="\u591A\u7EBF\u7A0B\u987A\u5229\u540C\u884C"></p><p>\u7136\u800C\u6210\u5E74\u4EBA\u7684\u4E16\u754C\u6CA1\u6709\u90A3\u4E48\u5B8C\u7F8E\uFF0C\u8F66\u9053\u4E00\u65E6\u591A\u8D77\u6765\u300E\u52A0\u585E\u300F\u7684\u573A\u666F\u5C31\u4F1A\u8D8A\u6765\u8D8A\u591A\uFF0C\u51FA\u73B0\u78B0\u649E\u540E\u4E5F\u4F1A\u5F71\u54CD\u6574\u6761\u9A6C\u8DEF\u7684\u901A\u884C\u6548\u7387\u3002\u8FD9\u4E48\u4E00\u5BF9\u6BD4\u4E0B\u6765\u300E\u591A\u8F66\u9053\u300F\u786E\u5B9E\u53EF\u80FD\u6BD4\u300E\u5355\u8F66\u9053\u300F\u8981\u6162\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/thread-bring-some-problem-532930da-03fe-4a59-aee8-0b97b5f1a966.png" alt="\u591A\u7EBF\u7A0B\u6545\u969C"></p><p>\u9632\u6B62\u6C7D\u8F66\u9891\u7E41\u53D8\u9053\u52A0\u585E\u53EF\u4EE5\u91C7\u53D6\u5728\u8F66\u9053\u95F4\u589E\u52A0\u300E\u62A4\u680F\u300F\uFF0C\u90A3\u5728\u7A0B\u5E8F\u7684\u4E16\u754C\u8BE5\u600E\u4E48\u505A\u5462\uFF1F</p><p>\u7A0B\u5E8F\u4E16\u754C\u4E2D\u591A\u7EBF\u7A0B\u9047\u5230\u7684\u95EE\u9898\u5F52\u7EB3\u8D77\u6765\u5C31\u662F\u4E09\u7C7B\uFF1A<code>\u300E\u7EBF\u7A0B\u5B89\u5168\u95EE\u9898\u300F</code>\u3001<code>\u300E\u6D3B\u8DC3\u6027\u95EE\u9898\u300F</code>\u3001<code>\u300E\u6027\u80FD\u95EE\u9898\u300F</code>\uFF0C\u63A5\u4E0B\u6765\u4F1A\u8BB2\u89E3\u8FD9\u4E9B\u95EE\u9898\uFF0C\u4EE5\u53CA\u95EE\u9898\u5BF9\u5E94\u7684\u89E3\u51B3\u624B\u6BB5\u3002</p><h2 id="\u7EBF\u7A0B\u5B89\u5168\u95EE\u9898" tabindex="-1"><a class="header-anchor" href="#\u7EBF\u7A0B\u5B89\u5168\u95EE\u9898" aria-hidden="true">#</a> \u7EBF\u7A0B\u5B89\u5168\u95EE\u9898</h2><p>\u6709\u65F6\u5019\u6211\u4EEC\u4F1A\u53D1\u73B0\uFF0C\u660E\u660E\u5728\u5355\u7EBF\u7A0B\u73AF\u5883\u4E2D\u6B63\u5E38\u8FD0\u884C\u7684\u4EE3\u7801\uFF0C\u5728\u591A\u7EBF\u7A0B\u73AF\u5883\u4E2D\u53EF\u80FD\u4F1A\u51FA\u73B0\u610F\u6599\u4E4B\u5916\u7684\u7ED3\u679C\uFF0C\u5176\u5B9E\u8FD9\u5C31\u662F\u5927\u5BB6\u5E38\u8BF4\u7684\u300E\u7EBF\u7A0B\u4E0D\u5B89\u5168\u300F\u3002\u90A3\u5230\u5E95\u4EC0\u4E48\u662F\u7EBF\u7A0B\u4E0D\u5B89\u5168\u5462\uFF1F\u5F80\u4E0B\u770B\u3002</p><p><strong>\u539F\u5B50\u6027</strong></p><p>\u4E3E\u4E00\u4E2A\u94F6\u884C\u8F6C\u8D26\u7684\u4F8B\u5B50\uFF0C\u6BD4\u5982\u4ECE\u8D26\u6237A\u5411\u8D26\u6237B\u8F6C1000\u5143\uFF0C\u90A3\u4E48\u5FC5\u7136\u5305\u62EC2\u4E2A\u64CD\u4F5C\uFF1A\u4ECE\u8D26\u6237A\u51CF\u53BB1000\u5143\uFF0C\u5F80\u8D26\u6237B\u52A0\u4E0A1000\u5143\uFF0C\u4E24\u4E2A\u64CD\u4F5C\u90FD\u6210\u529F\u624D\u610F\u5473\u7740\u4E00\u6B21\u8F6C\u8D26\u6700\u7EC8\u6210\u529F\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/thread-bring-some-problem-eba43c92-e42d-4318-a40c-b9365c32d922.png" alt=""></p><p>\u8BD5\u60F3\u4E00\u4E0B\uFF0C\u5982\u679C\u8FD9\u4E24\u4E2A\u64CD\u4F5C\u4E0D\u5177\u5907\u539F\u5B50\u6027\uFF0C\u4ECEA\u7684\u8D26\u6237\u6263\u51CF\u4E861000\u5143\u4E4B\u540E\uFF0C\u64CD\u4F5C\u7A81\u7136\u7EC8\u6B62\u4E86\uFF0C\u8D26\u6237B\u6CA1\u6709\u589E\u52A01000\u5143\uFF0C\u90A3\u95EE\u9898\u5C31\u5927\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/thread-bring-some-problem-c22ae9be-bd80-4613-9c7e-3feb83c6c83f.png" alt=""></p><p>\u94F6\u884C\u8F6C\u8D26\u8FD9\u4E2A\u4F8B\u5B50\u6709\u4E24\u4E2A\u6B65\u9AA4\uFF0C\u51FA\u73B0\u4E86\u610F\u5916\u540E\u5BFC\u81F4\u8F6C\u8D26\u5931\u8D25\uFF0C\u8BF4\u660E\u6CA1\u6709\u539F\u5B50\u6027\u3002</p><blockquote><p>\u539F\u5B50\u6027\uFF1A\u5373\u4E00\u4E2A\u64CD\u4F5C\u6216\u8005\u591A\u4E2A\u64CD\u4F5C \u8981\u4E48\u5168\u90E8\u6267\u884C\u5E76\u4E14\u6267\u884C\u7684\u8FC7\u7A0B\u4E0D\u4F1A\u88AB\u4EFB\u4F55\u56E0\u7D20\u6253\u65AD\uFF0C\u8981\u4E48\u5C31\u90FD\u4E0D\u6267\u884C\u3002</p><p>\u539F\u5B50\u64CD\u4F5C\uFF1A\u5373\u4E0D\u4F1A\u88AB\u7EBF\u7A0B\u8C03\u5EA6\u673A\u5236\u6253\u65AD\u7684\u64CD\u4F5C\uFF0C\u6CA1\u6709\u4E0A\u4E0B\u6587\u5207\u6362\u3002</p></blockquote><p>\u5728\u5E76\u53D1\u7F16\u7A0B\u4E2D\u5F88\u591A\u64CD\u4F5C\u90FD\u4E0D\u662F\u539F\u5B50\u64CD\u4F5C\uFF0C\u51FA\u4E2A\u5C0F\u9898\u76EE\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code>i <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span> <span class="token comment">// \u64CD\u4F5C1</span>
 i<span class="token operator">++</span><span class="token punctuation">;</span>   <span class="token comment">// \u64CD\u4F5C2</span>
 i <span class="token operator">=</span> j<span class="token punctuation">;</span> <span class="token comment">// \u64CD\u4F5C3</span>
 i <span class="token operator">=</span> i <span class="token operator">+</span> <span class="token number">1</span><span class="token punctuation">;</span> <span class="token comment">// \u64CD\u4F5C4</span>
diff --git a/dist/assets/thread-group-and-thread-priority.html.041c72b9.js b/dist/assets/thread-group-and-thread-priority.html.777c962b.js
similarity index 99%
rename from dist/assets/thread-group-and-thread-priority.html.041c72b9.js
rename to dist/assets/thread-group-and-thread-priority.html.777c962b.js
index 001431be..8becabe6 100644
--- a/dist/assets/thread-group-and-thread-priority.html.041c72b9.js
+++ b/dist/assets/thread-group-and-thread-priority.html.777c962b.js
@@ -1,4 +1,4 @@
-import{_ as t}from"./plugin-vue_export-helper.21dcd24c.js";import{r as e,o,c,a as n,b as a,e as l,d as p}from"./app.a0271b9c.js";const u={},i=l(`<h1 id="\u7EBF\u7A0B\u7EC4\u662F\u4EC0\u4E48-\u7EBF\u7A0B\u4F18\u5148\u7EA7\u5982\u4F55\u8BBE\u7F6E" tabindex="-1"><a class="header-anchor" href="#\u7EBF\u7A0B\u7EC4\u662F\u4EC0\u4E48-\u7EBF\u7A0B\u4F18\u5148\u7EA7\u5982\u4F55\u8BBE\u7F6E" aria-hidden="true">#</a> \u7EBF\u7A0B\u7EC4\u662F\u4EC0\u4E48\uFF1F\u7EBF\u7A0B\u4F18\u5148\u7EA7\u5982\u4F55\u8BBE\u7F6E\uFF1F</h1><h2 id="\u7EBF\u7A0B\u7EC4-threadgroup" tabindex="-1"><a class="header-anchor" href="#\u7EBF\u7A0B\u7EC4-threadgroup" aria-hidden="true">#</a> \u7EBF\u7A0B\u7EC4(ThreadGroup)</h2><p>Java\u4E2D\u7528ThreadGroup\u6765\u8868\u793A\u7EBF\u7A0B\u7EC4\uFF0C\u6211\u4EEC\u53EF\u4EE5\u4F7F\u7528\u7EBF\u7A0B\u7EC4\u5BF9\u7EBF\u7A0B\u8FDB\u884C\u6279\u91CF\u63A7\u5236\u3002</p><p>ThreadGroup\u548CThread\u7684\u5173\u7CFB\u5C31\u5982\u540C\u4ED6\u4EEC\u7684\u5B57\u9762\u610F\u601D\u4E00\u6837\u7B80\u5355\u7C97\u66B4\uFF0C\u6BCF\u4E2AThread\u5FC5\u7136\u5B58\u5728\u4E8E\u4E00\u4E2AThreadGroup\u4E2D\uFF0CThread\u4E0D\u80FD\u72EC\u7ACB\u4E8EThreadGroup\u5B58\u5728\u3002\u6267\u884Cmain()\u65B9\u6CD5\u7EBF\u7A0B\u7684\u540D\u5B57\u662Fmain\uFF0C\u5982\u679C\u5728new Thread\u65F6\u6CA1\u6709\u663E\u5F0F\u6307\u5B9A\uFF0C\u90A3\u4E48\u9ED8\u8BA4\u5C06\u7236\u7EBF\u7A0B\uFF08\u5F53\u524D\u6267\u884Cnew Thread\u7684\u7EBF\u7A0B\uFF09\u7EBF\u7A0B\u7EC4\u8BBE\u7F6E\u4E3A\u81EA\u5DF1\u7684\u7EBF\u7A0B\u7EC4\u3002</p><p>\u793A\u4F8B\u4EE3\u7801\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">Demo</span> <span class="token punctuation">{</span>
+import{_ as t}from"./plugin-vue_export-helper.21dcd24c.js";import{r as e,o,c,a as n,b as a,e as l,d as p}from"./app.615e41d8.js";const u={},i=l(`<h1 id="\u7EBF\u7A0B\u7EC4\u662F\u4EC0\u4E48-\u7EBF\u7A0B\u4F18\u5148\u7EA7\u5982\u4F55\u8BBE\u7F6E" tabindex="-1"><a class="header-anchor" href="#\u7EBF\u7A0B\u7EC4\u662F\u4EC0\u4E48-\u7EBF\u7A0B\u4F18\u5148\u7EA7\u5982\u4F55\u8BBE\u7F6E" aria-hidden="true">#</a> \u7EBF\u7A0B\u7EC4\u662F\u4EC0\u4E48\uFF1F\u7EBF\u7A0B\u4F18\u5148\u7EA7\u5982\u4F55\u8BBE\u7F6E\uFF1F</h1><h2 id="\u7EBF\u7A0B\u7EC4-threadgroup" tabindex="-1"><a class="header-anchor" href="#\u7EBF\u7A0B\u7EC4-threadgroup" aria-hidden="true">#</a> \u7EBF\u7A0B\u7EC4(ThreadGroup)</h2><p>Java\u4E2D\u7528ThreadGroup\u6765\u8868\u793A\u7EBF\u7A0B\u7EC4\uFF0C\u6211\u4EEC\u53EF\u4EE5\u4F7F\u7528\u7EBF\u7A0B\u7EC4\u5BF9\u7EBF\u7A0B\u8FDB\u884C\u6279\u91CF\u63A7\u5236\u3002</p><p>ThreadGroup\u548CThread\u7684\u5173\u7CFB\u5C31\u5982\u540C\u4ED6\u4EEC\u7684\u5B57\u9762\u610F\u601D\u4E00\u6837\u7B80\u5355\u7C97\u66B4\uFF0C\u6BCF\u4E2AThread\u5FC5\u7136\u5B58\u5728\u4E8E\u4E00\u4E2AThreadGroup\u4E2D\uFF0CThread\u4E0D\u80FD\u72EC\u7ACB\u4E8EThreadGroup\u5B58\u5728\u3002\u6267\u884Cmain()\u65B9\u6CD5\u7EBF\u7A0B\u7684\u540D\u5B57\u662Fmain\uFF0C\u5982\u679C\u5728new Thread\u65F6\u6CA1\u6709\u663E\u5F0F\u6307\u5B9A\uFF0C\u90A3\u4E48\u9ED8\u8BA4\u5C06\u7236\u7EBF\u7A0B\uFF08\u5F53\u524D\u6267\u884Cnew Thread\u7684\u7EBF\u7A0B\uFF09\u7EBF\u7A0B\u7EC4\u8BBE\u7F6E\u4E3A\u81EA\u5DF1\u7684\u7EBF\u7A0B\u7EC4\u3002</p><p>\u793A\u4F8B\u4EE3\u7801\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">Demo</span> <span class="token punctuation">{</span>
     <span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">void</span> <span class="token function">main</span><span class="token punctuation">(</span><span class="token class-name">String</span><span class="token punctuation">[</span><span class="token punctuation">]</span> args<span class="token punctuation">)</span> <span class="token punctuation">{</span>
         <span class="token class-name">Thread</span> testThread <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">Thread</span><span class="token punctuation">(</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">-&gt;</span> <span class="token punctuation">{</span>
             <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">&quot;testThread\u5F53\u524D\u7EBF\u7A0B\u7EC4\u540D\u5B57\uFF1A&quot;</span> <span class="token operator">+</span>
diff --git a/dist/assets/thread-state-and-method.html.a628789d.js b/dist/assets/thread-state-and-method.html.a816be26.js
similarity index 99%
rename from dist/assets/thread-state-and-method.html.a628789d.js
rename to dist/assets/thread-state-and-method.html.a816be26.js
index f725503a..4a364c22 100644
--- a/dist/assets/thread-state-and-method.html.a628789d.js
+++ b/dist/assets/thread-state-and-method.html.a816be26.js
@@ -1,4 +1,4 @@
-import{_ as p}from"./plugin-vue_export-helper.21dcd24c.js";import{r as e,o,c,a as n,b as a,e as l,d as t}from"./app.a0271b9c.js";const i={},u=l(`<h1 id="java\u7EBF\u7A0B\u76846\u79CD\u72B6\u6001\u53CA\u5207\u6362-\u900F\u5F7B\u8BB2\u89E3" tabindex="-1"><a class="header-anchor" href="#java\u7EBF\u7A0B\u76846\u79CD\u72B6\u6001\u53CA\u5207\u6362-\u900F\u5F7B\u8BB2\u89E3" aria-hidden="true">#</a> Java\u7EBF\u7A0B\u76846\u79CD\u72B6\u6001\u53CA\u5207\u6362(\u900F\u5F7B\u8BB2\u89E3)</h1><h2 id="\u64CD\u4F5C\u7CFB\u7EDF\u4E2D\u7684\u7EBF\u7A0B\u72B6\u6001\u8F6C\u6362" tabindex="-1"><a class="header-anchor" href="#\u64CD\u4F5C\u7CFB\u7EDF\u4E2D\u7684\u7EBF\u7A0B\u72B6\u6001\u8F6C\u6362" aria-hidden="true">#</a> \u64CD\u4F5C\u7CFB\u7EDF\u4E2D\u7684\u7EBF\u7A0B\u72B6\u6001\u8F6C\u6362</h2><p>\u9996\u5148\u6211\u4EEC\u6765\u770B\u770B\u64CD\u4F5C\u7CFB\u7EDF\u4E2D\u7684\u7EBF\u7A0B\u72B6\u6001\u8F6C\u6362\u3002</p><blockquote><p>\u5728\u73B0\u5728\u7684\u64CD\u4F5C\u7CFB\u7EDF\u4E2D\uFF0C\u7EBF\u7A0B\u662F\u88AB\u89C6\u4E3A\u8F7B\u91CF\u7EA7\u8FDB\u7A0B\u7684\uFF0C\u6240\u4EE5<strong>\u64CD\u4F5C\u7CFB\u7EDF\u7EBF\u7A0B\u7684\u72B6\u6001\u5176\u5B9E\u548C\u64CD\u4F5C\u7CFB\u7EDF\u8FDB\u7A0B\u7684\u72B6\u6001\u662F\u4E00\u81F4\u7684</strong>\u3002</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/thread-state-and-method-f60caaad-ad47-4edc-8d0a-ab736c2e8500.png" alt="\u7CFB\u7EDF\u8FDB\u7A0B/\u7EBF\u7A0B\u8F6C\u6362\u56FE"></p><p>\u64CD\u4F5C\u7CFB\u7EDF\u7EBF\u7A0B\u4E3B\u8981\u6709\u4EE5\u4E0B\u4E09\u4E2A\u72B6\u6001\uFF1A</p><ul><li>\u5C31\u7EEA\u72B6\u6001(ready)\uFF1A\u7EBF\u7A0B\u6B63\u5728\u7B49\u5F85\u4F7F\u7528CPU\uFF0C\u7ECF\u8C03\u5EA6\u7A0B\u5E8F\u8C03\u7528\u4E4B\u540E\u53EF\u8FDB\u5165running\u72B6\u6001\u3002</li><li>\u6267\u884C\u72B6\u6001(running)\uFF1A\u7EBF\u7A0B\u6B63\u5728\u4F7F\u7528CPU\u3002</li><li>\u7B49\u5F85\u72B6\u6001(waiting): \u7EBF\u7A0B\u7ECF\u8FC7\u7B49\u5F85\u4E8B\u4EF6\u7684\u8C03\u7528\u6216\u8005\u6B63\u5728\u7B49\u5F85\u5176\u4ED6\u8D44\u6E90\uFF08\u5982I/O\uFF09\u3002</li></ul><h2 id="java\u7EBF\u7A0B\u76846\u4E2A\u72B6\u6001" tabindex="-1"><a class="header-anchor" href="#java\u7EBF\u7A0B\u76846\u4E2A\u72B6\u6001" aria-hidden="true">#</a> Java\u7EBF\u7A0B\u76846\u4E2A\u72B6\u6001</h2><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token comment">// Thread.State \u6E90\u7801</span>
+import{_ as p}from"./plugin-vue_export-helper.21dcd24c.js";import{r as e,o,c,a as n,b as a,e as l,d as t}from"./app.615e41d8.js";const i={},u=l(`<h1 id="java\u7EBF\u7A0B\u76846\u79CD\u72B6\u6001\u53CA\u5207\u6362-\u900F\u5F7B\u8BB2\u89E3" tabindex="-1"><a class="header-anchor" href="#java\u7EBF\u7A0B\u76846\u79CD\u72B6\u6001\u53CA\u5207\u6362-\u900F\u5F7B\u8BB2\u89E3" aria-hidden="true">#</a> Java\u7EBF\u7A0B\u76846\u79CD\u72B6\u6001\u53CA\u5207\u6362(\u900F\u5F7B\u8BB2\u89E3)</h1><h2 id="\u64CD\u4F5C\u7CFB\u7EDF\u4E2D\u7684\u7EBF\u7A0B\u72B6\u6001\u8F6C\u6362" tabindex="-1"><a class="header-anchor" href="#\u64CD\u4F5C\u7CFB\u7EDF\u4E2D\u7684\u7EBF\u7A0B\u72B6\u6001\u8F6C\u6362" aria-hidden="true">#</a> \u64CD\u4F5C\u7CFB\u7EDF\u4E2D\u7684\u7EBF\u7A0B\u72B6\u6001\u8F6C\u6362</h2><p>\u9996\u5148\u6211\u4EEC\u6765\u770B\u770B\u64CD\u4F5C\u7CFB\u7EDF\u4E2D\u7684\u7EBF\u7A0B\u72B6\u6001\u8F6C\u6362\u3002</p><blockquote><p>\u5728\u73B0\u5728\u7684\u64CD\u4F5C\u7CFB\u7EDF\u4E2D\uFF0C\u7EBF\u7A0B\u662F\u88AB\u89C6\u4E3A\u8F7B\u91CF\u7EA7\u8FDB\u7A0B\u7684\uFF0C\u6240\u4EE5<strong>\u64CD\u4F5C\u7CFB\u7EDF\u7EBF\u7A0B\u7684\u72B6\u6001\u5176\u5B9E\u548C\u64CD\u4F5C\u7CFB\u7EDF\u8FDB\u7A0B\u7684\u72B6\u6001\u662F\u4E00\u81F4\u7684</strong>\u3002</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/thread-state-and-method-f60caaad-ad47-4edc-8d0a-ab736c2e8500.png" alt="\u7CFB\u7EDF\u8FDB\u7A0B/\u7EBF\u7A0B\u8F6C\u6362\u56FE"></p><p>\u64CD\u4F5C\u7CFB\u7EDF\u7EBF\u7A0B\u4E3B\u8981\u6709\u4EE5\u4E0B\u4E09\u4E2A\u72B6\u6001\uFF1A</p><ul><li>\u5C31\u7EEA\u72B6\u6001(ready)\uFF1A\u7EBF\u7A0B\u6B63\u5728\u7B49\u5F85\u4F7F\u7528CPU\uFF0C\u7ECF\u8C03\u5EA6\u7A0B\u5E8F\u8C03\u7528\u4E4B\u540E\u53EF\u8FDB\u5165running\u72B6\u6001\u3002</li><li>\u6267\u884C\u72B6\u6001(running)\uFF1A\u7EBF\u7A0B\u6B63\u5728\u4F7F\u7528CPU\u3002</li><li>\u7B49\u5F85\u72B6\u6001(waiting): \u7EBF\u7A0B\u7ECF\u8FC7\u7B49\u5F85\u4E8B\u4EF6\u7684\u8C03\u7528\u6216\u8005\u6B63\u5728\u7B49\u5F85\u5176\u4ED6\u8D44\u6E90\uFF08\u5982I/O\uFF09\u3002</li></ul><h2 id="java\u7EBF\u7A0B\u76846\u4E2A\u72B6\u6001" tabindex="-1"><a class="header-anchor" href="#java\u7EBF\u7A0B\u76846\u4E2A\u72B6\u6001" aria-hidden="true">#</a> Java\u7EBF\u7A0B\u76846\u4E2A\u72B6\u6001</h2><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token comment">// Thread.State \u6E90\u7801</span>
 <span class="token keyword">public</span> <span class="token keyword">enum</span> <span class="token class-name">State</span> <span class="token punctuation">{</span>
     NEW<span class="token punctuation">,</span>
     RUNNABLE<span class="token punctuation">,</span>
diff --git a/dist/assets/thread.html.a2ddbdf4.js b/dist/assets/thread.html.4fcef02c.js
similarity index 99%
rename from dist/assets/thread.html.a2ddbdf4.js
rename to dist/assets/thread.html.4fcef02c.js
index 7d58a455..bcb0a348 100644
--- a/dist/assets/thread.html.a2ddbdf4.js
+++ b/dist/assets/thread.html.4fcef02c.js
@@ -1 +1 @@
-import{_ as r}from"./plugin-vue_export-helper.21dcd24c.js";import{r as s,o as i,c as l,a as e,b as o,e as n,d as t}from"./app.a0271b9c.js";const c={},h=n('<h1 id="java\u5E76\u53D1\u7F16\u7A0B\u5B66\u4E60\u8DEF\u7EBF-\u5EFA\u8BAE\u6536\u85CF" tabindex="-1"><a class="header-anchor" href="#java\u5E76\u53D1\u7F16\u7A0B\u5B66\u4E60\u8DEF\u7EBF-\u5EFA\u8BAE\u6536\u85CF" aria-hidden="true">#</a> Java\u5E76\u53D1\u7F16\u7A0B\u5B66\u4E60\u8DEF\u7EBF\uFF08\u5EFA\u8BAE\u6536\u85CF\u{1F44D}\uFF09</h1><p>\u4F17\u6240\u5468\u77E5\uFF0CJava \u5E76\u53D1\u662F Java \u7A0B\u5E8F\u5458\u5FC5\u987B\u61C2\u4F46\u53C8\u5F88\u96BE\u61C2\u7684\u4E00\u5757\u77E5\u8BC6\u70B9\u3002\u4E00\u822C\u6765\u8BF4\uFF0C\u5F88\u5C11\u6709\u4EBA\u6562\u8BF4\u81EA\u5DF1\u7CBE\u901A Java \u5E76\u53D1\u7684\uFF0C\u4E00\u662F\u5BB9\u6613\u88AB\u9762\u8BD5\u5B98\u540A\u6253\uFF0C\u4E8C\u662F\u5E76\u53D1\u7F16\u7A0B\u6D89\u53CA\u5230\u64CD\u4F5C\u7CFB\u7EDF\u3001\u5185\u5B58\u3001CPU \u7B49\u8BA1\u7B97\u673A\u4E13\u4E1A\u6BD4\u8F83\u6838\u5FC3\u7684\u5185\u5BB9\uFF0C\u6BD4\u8F83\u8003\u9A8C\u4E00\u4E2A\u7A0B\u5E8F\u5458\u7684\u5185\u529F\u3002</p><p>\u4ECA\u5929\u8FD9\u7BC7\u6587\u7AE0\u5C31\u6765\u7ED9\u5927\u5BB6\u76D8\u70B9\u4E00\u4E0B Java \u5E76\u53D1\u5230\u5E95\u8BE5\u5982\u4F55\u4ECE\u5165\u95E8\u5230\u7CBE\u901A\uFF0C\u8BF7\u53CA\u65F6\u7528\u9E21\u6BDB\u63B8\u5B50\u628A\u6536\u85CF\u5939\u91CC\u7684\u7070\u6E05\u7406\u4E00\u4E0B\u3002\u5728\u9605\u8BFB\u8FC7\u7A0B\u4E2D\uFF0C\u5982\u679C\u6709\u6240\u5E2E\u52A9\uFF0C\u9EBB\u70E6\u70B9\u8D5E/\u6536\u85CF\u548C\u8F6C\u53D1\uFF0C\u7B97\u662F\u5BF9\u6211\u7801\u5B57\u7684\u8FD9\u4EFD\u575A\u6301\u7684\u4EBF\u70B9\u70B9\u9F13\u52B1\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java-thread-1.gif" alt=""></p><h3 id="\u4E00\u3001\u4E3A\u4EC0\u4E48\u8981\u5B66-java-\u5E76\u53D1" tabindex="-1"><a class="header-anchor" href="#\u4E00\u3001\u4E3A\u4EC0\u4E48\u8981\u5B66-java-\u5E76\u53D1" aria-hidden="true">#</a> \u4E00\u3001\u4E3A\u4EC0\u4E48\u8981\u5B66 Java \u5E76\u53D1\uFF1F</h3><p>\u6709\u53E5\u8BDD\u4E0D\u77E5\u9053\u5F53\u8BB2\u4E0D\u5F53\u8BB2\uFF0C\u5148\u8BB2\u4E86\u518D\u8BF4\uFF0C\u5C31\u662F\u201C\u5982\u679C\u4F60\u53EA\u60F3 CURD\uFF0C\u90A3\u4E48 Java \u5E76\u53D1\u4E0D\u5B66\u4E5F\u7F62\uFF01\u201D\u4F46\u5176\u5B9E\u5462\uFF0C\u5927\u5BB6\u90FD\u5DF2\u7ECF\u88AB\u6559\u80B2\u7684\u5F88\u6709\u6DB5\u517B\u4E86\uFF0C\u5DE5\u4F5C\u4E2D\u62E7\u4E0D\u62E7\u87BA\u4E1D\u4E0D\u91CD\u8981\uFF0C\u91CD\u8981\u7684\u662F\u9762\u8BD5\u4E00\u5B9A\u8981\u4F1A\u9020\u706B\u7BAD\uFF0C\u4E0D\u7136\u9762\u8BD5\u7684\u673A\u4F1A\u90FD\u5F88\u96BE\u635E\u5F97\u5230\u3002</p><p>\u90A3\u4F5C\u4E3A Java \u4F53\u7CFB\u4E2D\u975E\u5E38\u91CD\u8981\u7684\u4E00\u73AF\uFF0CJava \u5E76\u53D1\u81EA\u7136\u662F\u5FC5\u987B\u8981\u638C\u63E1\u7684\uFF0C\u6700\u8D77\u7801\u4E5F\u5F97\u4F1A\u8D77\u4E2A\u591A\u7EBF\u7A0B\u5427\uFF1F\u54C8\u54C8\u54C8\u3002\u9AD8\u7EA7\u70B9\u7684\uFF0C\u50CF\u5E73\u5E38\u5F00\u53D1\u4E2D\u7528\u5230\u7684 Tomcat \u670D\u52A1\u5668\u3001\u6D88\u606F\u4E2D\u95F4\u4EF6\u3001RPC \u6846\u67B6\u7B49\u7B49\uFF0C\u5B83\u4EEC\u7684\u5E95\u5C42\u90FD\u6D89\u53CA\u5230\u4E86\u5E76\u53D1\u7F16\u7A0B\u3002</p><p>\u5F53\u7136\u4E86\uFF0CJava \u5E76\u53D1\u6D89\u53CA\u5230\u4E1C\u897F\u5B9E\u5728\u662F\u4E0D\u5C11\uFF0C\u5305\u62EC\u64CD\u4F5C\u7CFB\u7EDF\u7684\u77E5\u8BC6\uFF0CJava \u865A\u62DF\u673A\u7684\u4E00\u4E9B\u77E5\u8BC6\uFF0CJava \u7EBF\u7A0B\u6A21\u578B\u7684\u77E5\u8BC6\uFF0C\u591A\u7EBF\u7A0B\u76F8\u5173\u7684\u5173\u952E\u5B57\uFF0C\u6BD4\u5982\u8BF4 synchronized\u3001volatile \u7B49\uFF0C\u8FD8\u6709\u9501\u7684\u77E5\u8BC6\u3001JDK \u63D0\u4F9B\u7684\u5DE5\u5177\u7C7B\u7B49\u7B49\uFF0C\u5B66\u8D77\u6765\u8FD8\u662F\u975E\u5E38\u5BB9\u6613\u4EE4\u4EBA\u5934\u5927\u7684\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java-thread-2.png" alt=""></p><p>\u56E0\u6B64\uFF0C\u6211\u4EEC\u9700\u8981\u4E00\u4E9B\u9AD8\u6548\u7684\u5B66\u4E60\u8DEF\u7EBF\u56FE\uFF0C\u4EE5\u53CA\u4E00\u4E9B\u4F18\u8D28\u7684\u5B66\u4E60\u8D44\u6E90\uFF0C\u4ECE\u800C\u51CF\u5C11\u6211\u4EEC\u5B66\u4E60Java \u5E76\u53D1\u7F16\u7A0B\u6240\u6295\u5165\u7684\u65F6\u95F4\u548C\u7CBE\u529B\u3002</p><h3 id="\u4E8C\u3001java-\u5E76\u53D1\u5B66\u4E60\u8DEF\u7EBF\u56FE" tabindex="-1"><a class="header-anchor" href="#\u4E8C\u3001java-\u5E76\u53D1\u5B66\u4E60\u8DEF\u7EBF\u56FE" aria-hidden="true">#</a> \u4E8C\u3001Java \u5E76\u53D1\u5B66\u4E60\u8DEF\u7EBF\u56FE</h3><p>\u8FD9\u662F\u6211\u6700\u8FD1\u6574\u7406\u7684\u4E00\u5F20\u5173\u4E8E Java \u5E76\u53D1\u7F16\u7A0B\u7684\u601D\u7EF4\u5BFC\u56FE\uFF0C\u5927\u7684\u65B9\u5411\u53EF\u4EE5\u5206\u4E3A\u4E09\u4E2A\u90E8\u5206\uFF1A\u7EBF\u7A0B\u57FA\u7840\u3001\u7406\u8BBA\u57FA\u7840\u3001\u5DE5\u5177\u7C7B JUC\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java-thread-map.png" alt=""></p><p>\u7EBF\u7A0B\u57FA\u7840\u90E8\u5206\u5305\u62EC\uFF1A</p><ul><li>\u7EBF\u7A0B\u7684\u521B\u5EFA\u65B9\u5F0F</li><li>\u7EBF\u7A0B\u7684\u72B6\u6001\u5207\u6362</li><li>\u7EBF\u7A0B\u7684\u57FA\u672C\u64CD\u4F5C</li><li>\u7EBF\u7A0B\u7EC4\u548C\u7EBF\u7A0B\u4F18\u5148\u7EA7</li></ul><p>\u7406\u8BBA\u57FA\u7840\u5305\u62EC\uFF1A</p><ul><li>\u8FDB\u7A0B\u548C\u7EBF\u7A0B\u7684\u533A\u522B</li><li>\u591A\u7EBF\u7A0B\u89E3\u51B3\u4E86\u4EC0\u4E48\u95EE\u9898\uFF0C\u53C8\u5E26\u6765\u4E86\u4EC0\u4E48\u95EE\u9898\uFF1F</li><li>\u5982\u4F55\u89E3\u51B3\u5E76\u53D1\u95EE\u9898\uFF1F\u5305\u62EC Java \u5185\u5B58\u6A21\u578B\uFF0C\u4EE5\u53CA\u4E24\u4E2A\u5E38\u89C1\u7684\u5173\u952E\u5B57 volatile \u548C synchronized</li></ul><p>\u5DE5\u5177\u7C7B JUC \u5305\u62EC\uFF1A</p><ul><li>\u9501 Lock \u7CFB\u7684 AQS\u3001ReentrantLock\u3001ReentrantReadWriteLock\u3001Condition\u3001LockSupport</li><li>\u5E76\u53D1\u5BB9\u5668\u7CFB\u7684 ConcurrentHashMap\u3001ConcurrentLinkedQueue\u3001CopyOnWriteArrayList\u3001ThreadLocal\u3001BlockingQueue</li><li>\u7EBF\u7A0B\u6C60\u7CFB\u7684 ThreadPoolExecutor\u3001ScheduledThreadPoolExecutor</li><li>\u539F\u5B50\u7CFB\u7684 AtomicInteger\u3001AtomicIntegerArray\u3001AtomicReference \u7B49\u7B49</li><li>\u901A\u4FE1\u5DE5\u5177\u7CFB\u7684\u5012\u8BA1\u65F6\u5668 CountDownLatch\u3001\u5FAA\u73AF\u6805\u680F CyclicBarrier\u3001\u8D44\u6E90\u8BBF\u95EE\u63A7\u5236 Semaphore\u3001\u6570\u636E\u4EA4\u6362 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\u63D0\u4F9B\u7684\u5E76\u53D1\u7EC4\u4EF6\uFF0C\u5927\u81F4\u53EF\u4EE5\u5206\u4E3A\u4E24\u7C7B\uFF1A</p><ul><li>\u4ECE\u9884\u9632\u9636\u6BB5\u4E0B\u624B\uFF0C\u9632\u6B62\u9519\u8BEF\u53D1\u751F\uFF0C\u6BD4\u5982\u8BF4 synchronized \u5173\u952E\u5B57</li><li>\u4E00\u65E6\u53D1\u751F\u9519\u8BEF\u80FD\u53CA\u65F6\u91CD\u8BD5\uFF0C\u6BD4\u5982\u8BF4 CAS</li></ul><p>\u5BF9\u4E8E\u7EBF\u7A0B\u6570\u91CF\u6BD4\u8F83\u591A\u7684\u5E76\u53D1\u573A\u666F\uFF0C\u91C7\u7528\u9884\u9632\u7684\u63AA\u65BD\u4F1A\u6BD4\u8F83\u5408\u7406\uFF0C\u8FD9\u6837\u5927\u90E8\u5206\u7EBF\u7A0B\u5C31\u4E0D\u4F1A\u56E0\u4E3A\u5C0F\u6982\u7387\u65F6\u95F4\u7684 CAS \u91CD\u8BD5\u6D6A\u8D39\u6389\u5927\u91CF\u7684 CPU \u5468\u671F\uFF1B\u5728\u7EBF\u7A0B\u6570\u91CF\u5C0F\u7684\u65F6\u5019\uFF0CCAS \u7684\u610F\u4E49\u5C31\u6BD4\u8F83\u5927\uFF0C\u56E0\u4E3A\u9884\u9632\u63AA\u65BD\u5E26\u6765\u7684\u7EBF\u7A0B\u5207\u6362\u8981\u6BD4 CAS \u7B49\u5F85\u7684\u5F00\u9500\u66F4\u5927\u3002</p><p>\u60F3\u8981\u5B66\u597D Java \u5E76\u53D1\u7F16\u7A0B\uFF0C\u5C31\u5FC5\u987B\u5F97\u5BF9\u4E0B\u56FE\u4E2D\u63D0\u5230\u7684\u57FA\u7840\u6982\u5FF5\u8FDB\u884C\u5145\u5206\u7684\u7406\u89E3\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java-thread-9.jpg" alt=""></p><p>\u5728\u6211\u770B\u6765\uFF0C\u5E76\u53D1\u7F16\u7A0B\u4E3B\u8981\u662F\u7528\u6765\u89E3\u51B3\u8FD9\u4E24\u4E2A\u75DB\u70B9\u7684\uFF1A</p><ul><li>\u591A\u4E2A\u7EBF\u7A0B\u5BF9\u540C\u4E00\u53D8\u91CF\u9020\u6210\u7684\u4E0D\u4E00\u81F4\u95EE\u9898\uFF1B</li><li>\u4E3A\u63D0\u9AD8\u6027\u80FD\uFF0C\u8BA1\u7B97\u673A\u7684\u5F88\u591A\u6267\u884C\u5355\u5143\u90FD\u914D\u5907\u4E86\u7F13\u5B58\uFF0C\u90A3\u52BF\u5FC5\u4F1A\u5F71\u54CD\u5E76\u53D1\u7F16\u7A0B\u7684\u6570\u636E\u4E00\u81F4\u6027\u3002</li></ul><p>\u9700\u8981\u63D0\u9192\u4E00\u70B9\u7684\u662F\uFF0C\u591A\u7EBF\u7A0B\u5E76\u53D1\u867D\u7136\u662F\u7528\u6765\u89E3\u51B3\u6027\u80FD\u95EE\u9898\u7684\uFF0C\u4F46\u5E76\u4E0D\u610F\u5473\u7740\u6240\u6709\u60C5\u51B5\u4E0B\u90FD\u9700\u8981\u5F00\u542F\u591A\u7EBF\u7A0B\uFF0C\u6709\u65F6\u5019\u53CD\u800C\u4F1A\u9002\u5F97\u5176\u53CD\uFF0C\u90A3\u5982\u679C\u4E0D\u662F\u7279\u522B\u8981\u6C42\uFF0C\u5C3D\u91CF\u4E0D\u8981\u8FC7\u65E9\u5F00\u542F\u591A\u7EBF\u7A0B\u3002</p><p>\u5E76\u53D1\u7F16\u7A0B\u662F Java \u4F53\u7CFB\u5F53\u4E2D\u76F8\u5BF9\u96BE\u638C\u63E1\u7684\u4E00\u5757\u77E5\u8BC6\u70B9\uFF0C\u6BD4\u8F83\u8003\u9A8C\u4E00\u540D\u7A0B\u5E8F\u5458\u7684\u5185\u529F\uFF0C\u5176\u5B9E\u5E76\u53D1\u7F16\u7A0B\u6700\u65E9\u7684\u5E94\u7528\u9886\u57DF\u5C31\u662F\u64CD\u4F5C\u7CFB\u7EDF\u7684\u5B9E\u73B0\u3002</p><p>\u5982\u679C\u4F60\u5DF2\u7ECF\u6709\u4E00\u5B9A\u7684\u7F16\u7A0B\u7ECF\u9A8C\uFF0C\u5EFA\u8BAE\u5148\u5B66\u4E00\u4E0B\u300A\u8BA1\u7B97\u673A\u7EC4\u6210\u539F\u7406\u300B\uFF0C\u5BF9\u64CD\u4F5C\u7CFB\u7EDF\u3001\u5185\u5B58\u3001CPU \u5148\u8FDB\u884C\u4E00\u4E9B\u5927\u81F4\u7684\u4E86\u89E3\uFF0C\u7136\u540E\u518D\u6765\u5B66\u4E60 Java \u5E76\u53D1\u7F16\u7A0B\uFF0C\u53EF\u80FD\u5C31\u4F1A\u611F\u89C9\u8212\u670D\u591A\u4E86\uFF01</p><p>\u7ED3\u5408\u6211\u591A\u5E74\u7684\u5DE5\u4F5C\u7ECF\u9A8C\u6765\u770B\uFF0C\u5E76\u53D1\u7F16\u7A0B\u53EF\u4EE5\u62BD\u8C61\u6210<strong>\u4E09\u4E2A\u6838\u5FC3\u95EE\u9898\uFF1A\u5206\u5DE5\u3001\u540C\u6B65\u548C\u4E92\u65A5</strong>\u3002</p><p>1\uFF09\u5206\u5DE5</p><p>\u5206\u5DE5\u6307\u7684\u662F\u5982\u4F55\u9AD8\u6548\u5730\u62C6\u89E3\u4EFB\u52A1\u5E76\u5206\u914D\u7ED9\u7EBF\u7A0B\uFF0C\u50CF\u5E76\u53D1\u7F16\u7A0B\u9886\u57DF\u7684\u4E00\u4E9B\u8BBE\u8BA1\u6A21\u5F0F\uFF0C\u6BD4\u5982\u8BF4\u751F\u4EA7\u8005\u4E0E\u6D88\u8D39\u8005\u5C31\u662F\u7528\u6765\u8FDB\u884C\u5206\u5DE5\u7684\u3002</p><p>2\uFF09\u540C\u6B65</p><p>\u540C\u6B65\u6307\u7684\u662F\u7EBF\u7A0B\u4E4B\u95F4\u5982\u4F55\u534F\u4F5C\uFF0C\u4E00\u4E2A\u7EBF\u7A0B\u6267\u884C\u5B8C\u4E86\u4E00\u4E2A\u4EFB\u52A1\uFF0C\u8981\u901A\u77E5\u53E6\u5916\u4E00\u4E2A\u7EBF\u7A0B\u5F00\u5DE5\u3002\u8FD8\u62FF\u751F\u4EA7\u8005-\u6D88\u8D39\u8005\u6A21\u578B\u6765\u8BF4\u5427\uFF0C\u5F53\u961F\u5217\u6EE1\u7684\u65F6\u5019\uFF0C\u751F\u4EA7\u8005\u7EBF\u7A0B\u7B49\u5F85\uFF0C\u5F53\u961F\u5217\u4E0D\u6EE1\u7684\u65F6\u5019\uFF0C\u751F\u4EA7\u8005\u7EBF\u7A0B\u9700\u8981\u88AB\u5524\u9192\u91CD\u65B0\u6267\u884C\uFF1B\u5F53\u961F\u5217\u7A7A\u7684\u65F6\u5019\uFF0C\u6D88\u8D39\u8005\u7EBF\u7A0B\u5F00\u59CB\u7B49\u5F85\uFF0C\u4E0D\u7A7A\u7684\u65F6\u5019\uFF0C\u6D88\u8D39\u8005\u7EBF\u7A0B\u88AB\u91CD\u65B0\u5524\u9192\u3002</p><p>3\uFF09\u4E92\u65A5</p><p>\u4E92\u65A5\u6307\u7684\u662F\u4FDD\u8BC1\u540C\u4E00\u65F6\u523B\u53EA\u6709\u4E00\u4E2A\u7EBF\u7A0B\u8BBF\u95EE\u5171\u4EAB\u8D44\u6E90\uFF0C\u662F\u89E3\u51B3\u7EBF\u7A0B\u5B89\u5168\u95EE\u9898\u7684\u6740\u624B\u950F\u3002</p><p>\u5F53\u591A\u4E2A\u7EBF\u7A0B\u540C\u65F6\u8BBF\u95EE\u4E00\u4E2A\u5171\u4EAB\u53D8\u91CF\u7684\u65F6\u5019\uFF0C\u5F88\u5BB9\u6613\u51FA\u73B0\u201C\u7EBF\u7A0B\u5B89\u5168\u201D\u95EE\u9898\uFF0C\u56E0\u4E3A\u7ED3\u679C\u53EF\u80FD\u662F\u4E0D\u786E\u5B9A\u7684\u2014\u2014\u5BFC\u81F4\u51FA\u73B0\u8FD9\u4E2A\u95EE\u9898\u7684\u6839\u6E90\u5C31\u662F\u53EF\u89C1\u6027\u3001\u6709\u5E8F\u6027\u548C\u539F\u5B50\u6027\u2014\u2014\u4E3A\u4E86\u89E3\u51B3\u5B83\u4EEC\uFF0CJava \u5F15\u5165\u4E86\u5185\u5B58\u6A21\u578B\u7684\u6982\u5FF5\uFF0C\u53EF\u4EE5\u5728\u4E00\u5B9A\u7A0B\u5EA6\u4E0A\u7F13\u89E3\u201C\u7EBF\u7A0B\u5B89\u5168\u201D\u7684\u95EE\u9898\uFF0C\u4F46\u8981\u60F3\u5B8C\u5168\u89E3\u51B3\u201C\u7EBF\u7A0B\u5B89\u5168\u201D\u95EE\u9898\uFF0C\u8FD8\u5F97\u9760\u4E92\u65A5\u3002</p><p>\u4E92\u65A5\u7684\u6838\u5FC3\u6280\u672F\u5C31\u662F\u9501\uFF0C\u6BD4\u5982\u8BF4 synchronized\uFF0C\u8FD8\u6709\u5404\u79CD Lock\u3002</p><p>\u9501\u53EF\u4EE5\u89E3\u51B3\u7EBF\u7A0B\u5B89\u5168\u7684\u95EE\u9898\uFF0C\u4F46\u540C\u65F6\u4E5F\u5C31\u610F\u5473\u7740\u7A0B\u5E8F\u7684\u6027\u80FD\u8981\u53D7\u5230\u5F71\u54CD\u3002</p><p>\u56E0\u6B64\uFF0CJava \u63D0\u4F9B\u4E86\u9488\u5BF9\u4E0D\u540C\u573A\u666F\u4E0B\u7684\u9501\uFF0C\u6BD4\u5982\u8BF4\u8BFB\u5199\u9501 ReadWriteLock\uFF0C\u53EF\u4EE5\u89E3\u51B3\u591A\u7EBF\u7A0B\u540C\u65F6\u8BFB\uFF0C\u4F46\u53EA\u6709\u4E00\u4E2A\u7EBF\u7A0B\u80FD\u5199\u7684\u95EE\u9898\uFF1B\u4F46 ReadWriteLock \u4E5F\u6709\u81EA\u5DF1\u7684\u95EE\u9898\uFF0C\u5C31\u662F\u5982\u679C\u6709\u7EBF\u7A0B\u6B63\u5728\u8BFB\uFF0C\u5199\u7EBF\u7A0B\u9700\u8981\u7B49\u5F85\u5EA6\u7EBF\u7A0B\u91CA\u653E\u9501\u540E\u624D\u80FD\u83B7\u5F97\u5199\u9501\uFF0C\u4E5F\u5C31\u662F\u8BFB\u7684\u8FC7\u7A0B\u4E2D\u4E0D\u5141\u8BB8\u5199\uFF0C\u5C5E\u4E8E\u4E00\u79CD\u60B2\u89C2\u7684\u8BFB\u9501\u3002</p><p>\u4E3A\u4E86\u8FDB\u4E00\u6B65\u63D0\u5347\u5E76\u53D1\u6267\u884C\u7684\u6548\u7387\uFF0CJava 8 \u5F15\u5165\u4E86\u4E00\u4E2A\u65B0\u7684\u8BFB\u5199\u9501 StampedLock\uFF0C\u4E0EReadWriteLock \u76F8\u6BD4\uFF0CStampedLock\u7684\u4F18\u52BF\u5728\u4E8E\u8BFB\u7684\u8FC7\u7A0B\u4E2D\u4E5F\u5141\u8BB8\u83B7\u53D6\u5199\u9501\u540E\u5199\u5165\uFF0C\u4F46\u5E26\u6765\u7684\u95EE\u9898\u5C31\u662F\u53EF\u80FD\u8BFB\u7684\u6570\u636E\u4E0D\u4E00\u81F4\uFF0C\u9700\u8981\u4E00\u70B9\u989D\u5916\u7684\u4EE3\u7801\u6765\u5224\u65AD\u8BFB\u7684\u8FC7\u7A0B\u4E2D\u662F\u5426\u6709\u5199\u5165\uFF0C\u672C\u8D28\u4E0A\u662F\u4E00\u79CD\u4E50\u89C2\u7684\u9501\u3002</p><p>\u4E50\u89C2\u9501\u7684\u610F\u601D\u5C31\u662F\u4F30\u8BA1\u8BFB\u7684\u8FC7\u7A0B\u4E2D\u5927\u6982\u7387\u4E0D\u4F1A\u6709\u5199\u5165\uFF0C\u800C\u60B2\u89C2\u9501\u5219\u662F\u8BFB\u7684\u8FC7\u7A0B\u4E2D\u62D2\u7EDD\u6709\u5199\u5165\uFF0C\u4E24\u8005\u7684\u533A\u522B\u5C31\u5728\u4E8E\u6027\u80FD\u4E0A\u4F1A\u6709\u5DEE\u5F02\uFF0C\u4E50\u89C2\u9501\u9700\u8981\u9488\u5BF9\u5C0F\u6982\u7387\u4E8B\u4EF6\u8FDB\u884C\u591A\u4E00\u6B65\u7684\u68C0\u6D4B\uFF0C\u4F46\u6027\u80FD\u4E5F\u4F1A\u6709\u6240\u63D0\u5347\uFF1B\u60B2\u89C2\u9501\u66F4\u80FD\u4FDD\u8BC1\u201C\u7EBF\u7A0B\u5B89\u5168\u6027\u201D\u3002</p><p>\u542C\u6211\u8FD9\u4E48\u4E00\u8BF4\uFF0C\u662F\u4E0D\u662F\u4E00\u4E0B\u5B50\u5C31\u6E05\u6670\u591A\u4E86\uFF01</p><p>\u53E6\u5916\uFF0C\u9700\u8981 Java \u5B66\u4E60\u8D44\u6599\u7684\u8BDD\uFF0C\u53EF\u4EE5\u76F4\u63A5\u6233\u6211\u6574\u7406\u7684\u8FD9\u4E2A GitHub/\u7801\u4E91\u4ED3\u5E93\u2014\u2014\u{1F4DA}Java\u7A0B\u5E8F\u5458\u5FC5\u8BFB\u4E66\u5355\u6574\u7406\uFF0C\u9644\u4E0B\u8F7D\u5730\u5740\uFF0C\u52A9\u529B\u6BCF\u4E00\u4E2AJava\u7A0B\u5E8F\u5458\u6784\u5EFA\u5C5E\u4E8E\u81EA\u5DF1\u7684\u77E5\u8BC6\u4F53\u7CFB\u3002\u5305\u62EC\u4F46\u4E0D\u9650\u4E8EJava\u3001\u8BBE\u8BA1\u6A21\u5F0F\u3001\u8BA1\u7B97\u673A\u7F51\u7EDC\u3001\u64CD\u4F5C\u7CFB\u7EDF\u3001\u6570\u636E\u5E93\u3001\u6570\u636E\u7ED3\u6784\u4E0E\u7B97\u6CD5\u3001\u5927\u6570\u636E\u3001\u67B6\u6784\u3001\u9762\u8BD5\u7B49\u7B49\u3002</p>',29),Be=t("GitHub \u5730\u5740\uFF1A"),Le={href:"https://github.com/itwanger/JavaBooks",target:"_blank",rel:"noopener noreferrer"},Se=t("https://github.com/itwanger/JavaBooks"),Ae=t("\u7801\u4E91\u5730\u5740\uFF1A"),Re={href:"https://gitee.com/itwanger/JavaBooks",target:"_blank",rel:"noopener noreferrer"},qe=t("https://gitee.com/itwanger/JavaBooks"),ye=e("p",null,"\u7ED9\u5927\u5BB6\u622A\u56FE\u5C55\u793A\u4E00\u4E0B\u91CC\u9762\u90FD\u6709\u54EA\u4E9B\u4F18\u8D28\u7684 PDF\uFF1A",-1),Ee=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/java-books.jpg",alt:""})],-1),Pe=e("p",null,[e("strong",null,"Java \u5E76\u53D1\u7F16\u7A0B\u867D\u7136\u96BE\u5B66\uFF0C\u4F1A\u6D89\u53CA\u5230\u64CD\u4F5C\u7CFB\u7EDF\u3001CPU\u3001\u5185\u5B58\u7B49\u504F\u57FA\u7840\u65B9\u9762\u7684\u5185\u5BB9\uFF0C\u4F46\u5982\u679C\u4F60\u80FD\u575A\u6301\u5B66\u4E0B\u53BB\uFF0C\u5185\u529F\u81EA\u7136\u800C\u7136\u5C31\u63D0\u5347\u4E86\u4E00\u5927\u622A"),t("\u3002")],-1),Ue=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png",alt:""})],-1);function ze(He,Te){const a=s("ExternalLinkIcon");return i(),l("div",null,[h,e("blockquote",null,[e("p",null,[e("a",p,[d,o(a)])])]),_,u,v,b,g,e("blockquote",null,[e("p",null,[m,e("a",J,[j,o(a)])])]),k,e("p",null,[x,e("a",f,[C,o(a)]),w]),B,L,S,A,R,e("p",null,[q,e("a",y,[E,o(a)]),P,e("a",U,[z,o(a)]),H]),T,N,e("p",null,[V,e("a",W,[D,o(a)]),Q]),F,e("blockquote",null,[e("p",null,[G,e("a",I,[K,o(a)])])]),e("p",null,[O,e("a",Z,[M,o(a)]),X,Y,$,ee,te]),ae,oe,e("blockquote",null,[e("p",null,[e("a",ne,[re,o(a)])])]),se,ie,le,e("p",null,[ce,e("a",he,[pe,o(a)]),de]),_e,e("p",null,[ue,e("a",ve,[be,o(a)]),ge]),me,Je,e("blockquote",null,[e("p",null,[e("a",je,[ke,o(a)])])]),xe,e("blockquote",null,[e("p",null,[e("a",fe,[Ce,o(a)])])]),we,e("ul",null,[e("li",null,[Be,e("a",Le,[Se,o(a)])]),e("li",null,[Ae,e("a",Re,[qe,o(a)])])]),ye,Ee,Pe,Ue])}var We=r(c,[["render",ze],["__file","thread.html.vue"]]);export{We as default};
+import{_ as r}from"./plugin-vue_export-helper.21dcd24c.js";import{r as s,o as i,c as l,a as e,b as o,e as n,d as t}from"./app.615e41d8.js";const c={},h=n('<h1 id="java\u5E76\u53D1\u7F16\u7A0B\u5B66\u4E60\u8DEF\u7EBF-\u5EFA\u8BAE\u6536\u85CF" tabindex="-1"><a class="header-anchor" href="#java\u5E76\u53D1\u7F16\u7A0B\u5B66\u4E60\u8DEF\u7EBF-\u5EFA\u8BAE\u6536\u85CF" aria-hidden="true">#</a> Java\u5E76\u53D1\u7F16\u7A0B\u5B66\u4E60\u8DEF\u7EBF\uFF08\u5EFA\u8BAE\u6536\u85CF\u{1F44D}\uFF09</h1><p>\u4F17\u6240\u5468\u77E5\uFF0CJava \u5E76\u53D1\u662F Java \u7A0B\u5E8F\u5458\u5FC5\u987B\u61C2\u4F46\u53C8\u5F88\u96BE\u61C2\u7684\u4E00\u5757\u77E5\u8BC6\u70B9\u3002\u4E00\u822C\u6765\u8BF4\uFF0C\u5F88\u5C11\u6709\u4EBA\u6562\u8BF4\u81EA\u5DF1\u7CBE\u901A Java \u5E76\u53D1\u7684\uFF0C\u4E00\u662F\u5BB9\u6613\u88AB\u9762\u8BD5\u5B98\u540A\u6253\uFF0C\u4E8C\u662F\u5E76\u53D1\u7F16\u7A0B\u6D89\u53CA\u5230\u64CD\u4F5C\u7CFB\u7EDF\u3001\u5185\u5B58\u3001CPU 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href="#\u4E00\u3001\u4E3A\u4EC0\u4E48\u8981\u5B66-java-\u5E76\u53D1" aria-hidden="true">#</a> \u4E00\u3001\u4E3A\u4EC0\u4E48\u8981\u5B66 Java \u5E76\u53D1\uFF1F</h3><p>\u6709\u53E5\u8BDD\u4E0D\u77E5\u9053\u5F53\u8BB2\u4E0D\u5F53\u8BB2\uFF0C\u5148\u8BB2\u4E86\u518D\u8BF4\uFF0C\u5C31\u662F\u201C\u5982\u679C\u4F60\u53EA\u60F3 CURD\uFF0C\u90A3\u4E48 Java \u5E76\u53D1\u4E0D\u5B66\u4E5F\u7F62\uFF01\u201D\u4F46\u5176\u5B9E\u5462\uFF0C\u5927\u5BB6\u90FD\u5DF2\u7ECF\u88AB\u6559\u80B2\u7684\u5F88\u6709\u6DB5\u517B\u4E86\uFF0C\u5DE5\u4F5C\u4E2D\u62E7\u4E0D\u62E7\u87BA\u4E1D\u4E0D\u91CD\u8981\uFF0C\u91CD\u8981\u7684\u662F\u9762\u8BD5\u4E00\u5B9A\u8981\u4F1A\u9020\u706B\u7BAD\uFF0C\u4E0D\u7136\u9762\u8BD5\u7684\u673A\u4F1A\u90FD\u5F88\u96BE\u635E\u5F97\u5230\u3002</p><p>\u90A3\u4F5C\u4E3A Java \u4F53\u7CFB\u4E2D\u975E\u5E38\u91CD\u8981\u7684\u4E00\u73AF\uFF0CJava \u5E76\u53D1\u81EA\u7136\u662F\u5FC5\u987B\u8981\u638C\u63E1\u7684\uFF0C\u6700\u8D77\u7801\u4E5F\u5F97\u4F1A\u8D77\u4E2A\u591A\u7EBF\u7A0B\u5427\uFF1F\u54C8\u54C8\u54C8\u3002\u9AD8\u7EA7\u70B9\u7684\uFF0C\u50CF\u5E73\u5E38\u5F00\u53D1\u4E2D\u7528\u5230\u7684 Tomcat \u670D\u52A1\u5668\u3001\u6D88\u606F\u4E2D\u95F4\u4EF6\u3001RPC \u6846\u67B6\u7B49\u7B49\uFF0C\u5B83\u4EEC\u7684\u5E95\u5C42\u90FD\u6D89\u53CA\u5230\u4E86\u5E76\u53D1\u7F16\u7A0B\u3002</p><p>\u5F53\u7136\u4E86\uFF0CJava \u5E76\u53D1\u6D89\u53CA\u5230\u4E1C\u897F\u5B9E\u5728\u662F\u4E0D\u5C11\uFF0C\u5305\u62EC\u64CD\u4F5C\u7CFB\u7EDF\u7684\u77E5\u8BC6\uFF0CJava \u865A\u62DF\u673A\u7684\u4E00\u4E9B\u77E5\u8BC6\uFF0CJava \u7EBF\u7A0B\u6A21\u578B\u7684\u77E5\u8BC6\uFF0C\u591A\u7EBF\u7A0B\u76F8\u5173\u7684\u5173\u952E\u5B57\uFF0C\u6BD4\u5982\u8BF4 synchronized\u3001volatile \u7B49\uFF0C\u8FD8\u6709\u9501\u7684\u77E5\u8BC6\u3001JDK \u63D0\u4F9B\u7684\u5DE5\u5177\u7C7B\u7B49\u7B49\uFF0C\u5B66\u8D77\u6765\u8FD8\u662F\u975E\u5E38\u5BB9\u6613\u4EE4\u4EBA\u5934\u5927\u7684\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java-thread-2.png" alt=""></p><p>\u56E0\u6B64\uFF0C\u6211\u4EEC\u9700\u8981\u4E00\u4E9B\u9AD8\u6548\u7684\u5B66\u4E60\u8DEF\u7EBF\u56FE\uFF0C\u4EE5\u53CA\u4E00\u4E9B\u4F18\u8D28\u7684\u5B66\u4E60\u8D44\u6E90\uFF0C\u4ECE\u800C\u51CF\u5C11\u6211\u4EEC\u5B66\u4E60Java \u5E76\u53D1\u7F16\u7A0B\u6240\u6295\u5165\u7684\u65F6\u95F4\u548C\u7CBE\u529B\u3002</p><h3 id="\u4E8C\u3001java-\u5E76\u53D1\u5B66\u4E60\u8DEF\u7EBF\u56FE" tabindex="-1"><a class="header-anchor" href="#\u4E8C\u3001java-\u5E76\u53D1\u5B66\u4E60\u8DEF\u7EBF\u56FE" aria-hidden="true">#</a> \u4E8C\u3001Java \u5E76\u53D1\u5B66\u4E60\u8DEF\u7EBF\u56FE</h3><p>\u8FD9\u662F\u6211\u6700\u8FD1\u6574\u7406\u7684\u4E00\u5F20\u5173\u4E8E Java \u5E76\u53D1\u7F16\u7A0B\u7684\u601D\u7EF4\u5BFC\u56FE\uFF0C\u5927\u7684\u65B9\u5411\u53EF\u4EE5\u5206\u4E3A\u4E09\u4E2A\u90E8\u5206\uFF1A\u7EBF\u7A0B\u57FA\u7840\u3001\u7406\u8BBA\u57FA\u7840\u3001\u5DE5\u5177\u7C7B JUC\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java-thread-map.png" alt=""></p><p>\u7EBF\u7A0B\u57FA\u7840\u90E8\u5206\u5305\u62EC\uFF1A</p><ul><li>\u7EBF\u7A0B\u7684\u521B\u5EFA\u65B9\u5F0F</li><li>\u7EBF\u7A0B\u7684\u72B6\u6001\u5207\u6362</li><li>\u7EBF\u7A0B\u7684\u57FA\u672C\u64CD\u4F5C</li><li>\u7EBF\u7A0B\u7EC4\u548C\u7EBF\u7A0B\u4F18\u5148\u7EA7</li></ul><p>\u7406\u8BBA\u57FA\u7840\u5305\u62EC\uFF1A</p><ul><li>\u8FDB\u7A0B\u548C\u7EBF\u7A0B\u7684\u533A\u522B</li><li>\u591A\u7EBF\u7A0B\u89E3\u51B3\u4E86\u4EC0\u4E48\u95EE\u9898\uFF0C\u53C8\u5E26\u6765\u4E86\u4EC0\u4E48\u95EE\u9898\uFF1F</li><li>\u5982\u4F55\u89E3\u51B3\u5E76\u53D1\u95EE\u9898\uFF1F\u5305\u62EC Java 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Exchanger\u3001\u79FB\u76F8\u5668Phaser</li><li>Fork/Join\u6846\u67B6</li></ul><p>\u6700\u540E\u518D\u6765\u4E2A\u7ECF\u5178\u7684\u751F\u4EA7\u8005\u6D88\u8D39\u8005\u6A21\u5F0F\u8FDB\u884C\u5B9E\u8DF5\uFF0C\u6574\u4E2A Java \u5E76\u53D1\u4F53\u7CFB\u5C31\u5B66\u5F97\u975E\u5E38\u624E\u5B9E\u4E86\uFF01</p><h3 id="\u4E09\u3001\u786C\u6838-java-\u5E76\u53D1\u5B66\u4E60\u8D44\u6599" tabindex="-1"><a class="header-anchor" href="#\u4E09\u3001\u786C\u6838-java-\u5E76\u53D1\u5B66\u4E60\u8D44\u6599" aria-hidden="true">#</a> \u4E09\u3001\u786C\u6838 Java \u5E76\u53D1\u5B66\u4E60\u8D44\u6599</h3><p><strong>1\uFF09Java \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF</strong></p><p>\u5B66 Java\uFF0C\u5F53\u7136\u8981\u627E Java \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF\uFF0C\u7F51\u5740\u6211\u8D34\u4E0B\u9762\u4E86\u54C8\uFF1A</p>',23),p={href:"https://tobebetterjavaer.com/home.html#java%E5%B9%B6%E5%8F%91%E7%BC%96%E7%A8%8B",target:"_blank",rel:"noopener 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diff --git a/dist/assets/thymeleaf.html.be244969.js b/dist/assets/thymeleaf.html.943910b5.js
similarity index 54%
rename from dist/assets/thymeleaf.html.be244969.js
rename to dist/assets/thymeleaf.html.943910b5.js
index 4b004751..a8d2ef48 100644
--- a/dist/assets/thymeleaf.html.be244969.js
+++ b/dist/assets/thymeleaf.html.943910b5.js
@@ -1,4 +1,4 @@
-import{_ as o}from"./plugin-vue_export-helper.21dcd24c.js";import{r as s,o as c,c as r,a as e,b as n,w as d,e as l,d as t}from"./app.a0271b9c.js";const p={},u=l('<h3 id="\u5173\u4E8E-thymeleaf" tabindex="-1"><a class="header-anchor" href="#\u5173\u4E8E-thymeleaf" aria-hidden="true">#</a> \u5173\u4E8E Thymeleaf</h3><p>Thymeleaf \u662F\u4E00\u4E2A\u4F18\u79C0\u7684\u3001\u9762\u5411 Java \u7684 HTML \u9875\u9762\u6A21\u677F\uFF0C\u5177\u6709\u4E30\u5BCC\u7684\u6807\u7B7E\u8BED\u8A00\u548C\u51FD\u6570\u3002\u5728 JSP \u88AB\u6DD8\u6C70\u4E4B\u540E\uFF0CThymeleaf \u53D6\u800C\u4EE3\u4E4B\u6210\u4E3A\u4E86 Spring Boot \u63A8\u8350\u7684\u6A21\u677F\u5F15\u64CE\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/thymeleaf-d373bf02-a577-4382-89b4-0b29a87ab922.png" alt=""></p><p>Thymeleaf \u5728\u6709\u7F51\u548C\u6CA1\u7F51\u7684\u73AF\u5883\u4E0B\u90FD\u53EF\u4EE5\u6B63\u5E38\u5DE5\u4F5C\uFF0C\u65E2\u80FD\u8BA9\u7F8E\u5DE5\u5728\u6D4F\u89C8\u5668\u4E2D\u67E5\u770B\u9875\u9762\u7684\u9759\u6001\u6548\u679C\uFF0C\u4E5F\u80FD\u8BA9\u7A0B\u5E8F\u5458\u5728\u670D\u52A1\u5668\u67E5\u770B\u5E26\u6570\u636E\u7684\u52A8\u6001\u9875\u9762\u6548\u679C\u3002</p><p>\u8FD9\u662F\u56E0\u4E3A Thymeleaf \u652F\u6301 HTML \u539F\u578B\uFF0C\u5728 HTML \u6807\u7B7E\u91CC\u589E\u52A0\u989D\u5916\u7684\u5C5E\u6027\u6765\u8FBE\u5230\u6A21\u677F+\u6570\u636E\u7684\u5C55\u793A\u65B9\u5F0F\u3002</p><p>\u6D4F\u89C8\u5668\u5728\u89E3\u91CA HTML \u7684\u65F6\u5019\u4F1A\u5FFD\u7565\u672A\u5B9A\u4E49\u7684\u6807\u7B7E\u5C5E\u6027\uFF0C\u6240\u4EE5 Thymeleaf \u53EF\u4EE5\u9759\u6001\u5730\u8FD0\u884C\uFF1B\u5F53\u6709\u6570\u636E\u8FD4\u56DE\u9875\u9762\u65F6\uFF0CThymeleaf \u6807\u7B7E\u4F1A\u52A8\u6001\u5730\u66FF\u6362\u9759\u6001\u5185\u5BB9\u3002</p><p>\u4E0B\u9762\u5217\u4E3E\u4E00\u4E9B Thymeleaf \u5E38\u7528\u7684\u8868\u8FBE\u5F0F\u3001\u6807\u7B7E\u548C\u51FD\u6570\u3002</p><p>1\uFF09\u5E38\u7528\u8868\u8FBE\u5F0F</p><ul><li><code>${...}</code>\u53D8\u91CF\u8868\u8FBE\u5F0F</li><li><code>*{...}</code>\u9009\u62E9\u8868\u8FBE\u5F0F</li><li><code>#{...}</code>\u6587\u5B57\u8868\u8FBE\u5F0F</li><li><code>@{...}</code>URL \u8868\u8FBE\u5F0F</li><li><code>#maps</code> \u5BF9\u8C61\u8868\u8FBE\u5F0F</li></ul><p>2\uFF09\u5E38\u7528\u6807\u7B7E</p><ul><li>th:action \u5B9A\u4E49\u670D\u52A1\u5668\u7AEF\u63A7\u5236\u5668\u8DEF\u5F84\u3002</li><li>th:each \u5FAA\u73AF\u8BED\u53E5</li><li>th:field \u8868\u5355\u5B57\u6BB5</li><li>th:href URL \u94FE\u63A5</li><li>th:id div \u6807\u7B7E\u4E2D\u7684 ID</li><li>th:if \u6761\u4EF6\u5224\u65AD</li><li>th:include \u5F15\u5165\u6587\u4EF6</li><li>th:fragment \u5B9A\u4E49\u4EE3\u7801\u7247\u6BB5</li><li>th:object \u66FF\u6362\u5BF9\u8C61</li><li>th:src \u56FE\u7247\u5730\u5740</li><li>th:text \u6587\u672C</li><li>th:value \u5C5E\u6027\u503C</li></ul><p>3\uFF09\u5E38\u7528\u51FD\u6570</p><ul><li><code>#dates</code> \u65E5\u671F\u51FD\u6570</li><li><code>#lists</code> \u5217\u8868\u51FD\u6570</li><li><code>#arrays</code> \u6570\u7EC4\u51FD\u6570</li><li><code>#strings</code> \u5B57\u7B26\u4E32\u51FD\u6570</li><li><code>#numbers</code> \u6570\u5B57\u51FD\u6570</li><li><code>#calendars</code> \u65E5\u5386\u51FD\u6570</li><li><code>#objects</code> \u5BF9\u8C61\u51FD\u6570</li><li><code>#bools</code> \u5E03\u5C14\u51FD\u6570</li></ul><p>\u60F3\u8981\u67E5\u770B\u66F4\u591A Thymeleaf \u8868\u8FBE\u5F0F\u3001\u6807\u7B7E\u3001\u51FD\u6570\u7B49\u5185\u5BB9\uFF0C\u53EF\u4EE5\u5230 Thymeleaf \u5B98\u7F51\uFF1A</p>',14),h={href:"https://www.thymeleaf.org/",target:"_blank",rel:"noopener noreferrer"},m=t("https://www.thymeleaf.org/"),v=l(`<h3 id="\u6574\u5408-thymeleaf" tabindex="-1"><a class="header-anchor" href="#\u6574\u5408-thymeleaf" aria-hidden="true">#</a> \u6574\u5408 Thymeleaf</h3><p>\u7B2C\u4E00\u6B65\uFF0C\u5728 pom.xml \u6587\u4EF6\u4E2D\u6DFB\u52A0 Thymeleaf \u7684 stater</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
+import{_ as l}from"./plugin-vue_export-helper.21dcd24c.js";import{r as i,o,c,a as e,b as a,e as s,d as t}from"./app.615e41d8.js";const r={},d=s('<h2 id="\u5173\u4E8E-thymeleaf" tabindex="-1"><a class="header-anchor" href="#\u5173\u4E8E-thymeleaf" aria-hidden="true">#</a> \u5173\u4E8E Thymeleaf</h2><p>Thymeleaf \u662F\u4E00\u4E2A\u4F18\u79C0\u7684\u3001\u9762\u5411 Java \u7684 HTML \u9875\u9762\u6A21\u677F\uFF0C\u5177\u6709\u4E30\u5BCC\u7684\u6807\u7B7E\u8BED\u8A00\u548C\u51FD\u6570\u3002\u5728 JSP \u88AB\u6DD8\u6C70\u4E4B\u540E\uFF0CThymeleaf \u53D6\u800C\u4EE3\u4E4B\u6210\u4E3A\u4E86 Spring Boot \u63A8\u8350\u7684\u6A21\u677F\u5F15\u64CE\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/thymeleaf-d373bf02-a577-4382-89b4-0b29a87ab922.png" alt=""></p><p>Thymeleaf \u5728\u6709\u7F51\u548C\u6CA1\u7F51\u7684\u73AF\u5883\u4E0B\u90FD\u53EF\u4EE5\u6B63\u5E38\u5DE5\u4F5C\uFF0C\u65E2\u80FD\u8BA9\u7F8E\u5DE5\u5728\u6D4F\u89C8\u5668\u4E2D\u67E5\u770B\u9875\u9762\u7684\u9759\u6001\u6548\u679C\uFF0C\u4E5F\u80FD\u8BA9\u7A0B\u5E8F\u5458\u5728\u670D\u52A1\u5668\u67E5\u770B\u5E26\u6570\u636E\u7684\u52A8\u6001\u9875\u9762\u6548\u679C\u3002</p><p>\u8FD9\u662F\u56E0\u4E3A Thymeleaf \u652F\u6301 HTML \u539F\u578B\uFF0C\u5728 HTML \u6807\u7B7E\u91CC\u589E\u52A0\u989D\u5916\u7684\u5C5E\u6027\u6765\u8FBE\u5230\u6A21\u677F+\u6570\u636E\u7684\u5C55\u793A\u65B9\u5F0F\u3002</p><p>\u6D4F\u89C8\u5668\u5728\u89E3\u91CA HTML \u7684\u65F6\u5019\u4F1A\u5FFD\u7565\u672A\u5B9A\u4E49\u7684\u6807\u7B7E\u5C5E\u6027\uFF0C\u6240\u4EE5 Thymeleaf \u53EF\u4EE5\u9759\u6001\u5730\u8FD0\u884C\uFF1B\u5F53\u6709\u6570\u636E\u8FD4\u56DE\u9875\u9762\u65F6\uFF0CThymeleaf \u6807\u7B7E\u4F1A\u52A8\u6001\u5730\u66FF\u6362\u9759\u6001\u5185\u5BB9\u3002</p><p>\u4E0B\u9762\u5217\u4E3E\u4E00\u4E9B Thymeleaf \u5E38\u7528\u7684\u8868\u8FBE\u5F0F\u3001\u6807\u7B7E\u548C\u51FD\u6570\u3002</p><p>1\uFF09\u5E38\u7528\u8868\u8FBE\u5F0F</p><ul><li><code>${...}</code>\u53D8\u91CF\u8868\u8FBE\u5F0F</li><li><code>*{...}</code>\u9009\u62E9\u8868\u8FBE\u5F0F</li><li><code>#{...}</code>\u6587\u5B57\u8868\u8FBE\u5F0F</li><li><code>@{...}</code>URL \u8868\u8FBE\u5F0F</li><li><code>#maps</code> \u5BF9\u8C61\u8868\u8FBE\u5F0F</li></ul><p>2\uFF09\u5E38\u7528\u6807\u7B7E</p><ul><li>th:action \u5B9A\u4E49\u670D\u52A1\u5668\u7AEF\u63A7\u5236\u5668\u8DEF\u5F84\u3002</li><li>th:each \u5FAA\u73AF\u8BED\u53E5</li><li>th:field \u8868\u5355\u5B57\u6BB5</li><li>th:href URL \u94FE\u63A5</li><li>th:id div \u6807\u7B7E\u4E2D\u7684 ID</li><li>th:if \u6761\u4EF6\u5224\u65AD</li><li>th:include \u5F15\u5165\u6587\u4EF6</li><li>th:fragment \u5B9A\u4E49\u4EE3\u7801\u7247\u6BB5</li><li>th:object \u66FF\u6362\u5BF9\u8C61</li><li>th:src \u56FE\u7247\u5730\u5740</li><li>th:text \u6587\u672C</li><li>th:value \u5C5E\u6027\u503C</li></ul><p>3\uFF09\u5E38\u7528\u51FD\u6570</p><ul><li><code>#dates</code> \u65E5\u671F\u51FD\u6570</li><li><code>#lists</code> \u5217\u8868\u51FD\u6570</li><li><code>#arrays</code> \u6570\u7EC4\u51FD\u6570</li><li><code>#strings</code> \u5B57\u7B26\u4E32\u51FD\u6570</li><li><code>#numbers</code> \u6570\u5B57\u51FD\u6570</li><li><code>#calendars</code> \u65E5\u5386\u51FD\u6570</li><li><code>#objects</code> \u5BF9\u8C61\u51FD\u6570</li><li><code>#bools</code> \u5E03\u5C14\u51FD\u6570</li></ul><p>\u60F3\u8981\u67E5\u770B\u66F4\u591A Thymeleaf \u8868\u8FBE\u5F0F\u3001\u6807\u7B7E\u3001\u51FD\u6570\u7B49\u5185\u5BB9\uFF0C\u53EF\u4EE5\u5230 Thymeleaf \u5B98\u7F51\uFF1A</p>',14),p={href:"https://www.thymeleaf.org/",target:"_blank",rel:"noopener noreferrer"},u=t("https://www.thymeleaf.org/"),h=s(`<h2 id="\u6574\u5408-thymeleaf" tabindex="-1"><a class="header-anchor" href="#\u6574\u5408-thymeleaf" aria-hidden="true">#</a> \u6574\u5408 Thymeleaf</h2><p>\u7B2C\u4E00\u6B65\uFF0C\u5728 pom.xml \u6587\u4EF6\u4E2D\u6DFB\u52A0 Thymeleaf \u7684 stater</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
     &lt;groupId&gt;org.springframework.boot&lt;/groupId&gt;
     &lt;artifactId&gt;spring-boot-starter-thymeleaf&lt;/artifactId&gt;
 &lt;/dependency&gt;
@@ -36,4 +36,4 @@ import{_ as o}from"./plugin-vue_export-helper.21dcd24c.js";import{r as s,o as c,
     &lt;/table&gt;
 &lt;/body&gt;
 &lt;/html&gt;
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p><code>&lt;html lang=&quot;zh&quot; xmlns:th=&quot;http://www.thymeleaf.org&quot;&gt;</code> \u4E3A Thymeleaf \u7684\u547D\u540D\u7A7A\u95F4\uFF0C\u901A\u8FC7\u5F15\u5165\u547D\u540D\u7A7A\u95F4\u5C31\u53EF\u4EE5\u5728 HTML \u6587\u4EF6\u4E2D\u4F7F\u7528 Thymeleaf \u6807\u7B7E\u8BED\u8A00\uFF0C\u7528\u5173\u952E\u5B57 \u201Cth\u201D\u6765\u6807\u6CE8\u3002</p><p>\u7B2C\u4E94\u6B65\uFF0C\u542F\u52A8\u4E3B\u7C7B\uFF0C\u5982\u679C\u770B\u5230\u4EE5\u4E0B\u4FE1\u606F\u8868\u793A\u542F\u52A8\u6210\u529F\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/thymeleaf-3e636801-32df-4591-9159-fe83f771f68d.png" alt=""></p><p>\u7B2C\u516D\u6B65\uFF0C\u5728\u6D4F\u89C8\u5668\u5730\u5740\u680F\u91CC\u8F93\u5165 <code>http://localhost:8080/user/all</code> \u8BBF\u95EE\u63A5\u53E3\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/thymeleaf-e4b658fd-e30a-4b00-8818-ab00f8a28620.png" alt=""></p><h3 id="http-client" tabindex="-1"><a class="header-anchor" href="#http-client" aria-hidden="true">#</a> HTTP Client</h3><hr>`,20),g=t("\u66F4\u591A\u5185\u5BB9\uFF0C\u53EA\u9488\u5BF9\u300AJava \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF\u300B\u661F\u7403\u7528\u6237\u5F00\u653E\uFF0C\u9700\u8981\u7684\u5C0F\u4F19\u4F34\u53EF\u4EE5"),b=t("\u6233\u94FE\u63A5\u{1F517}"),f=t("\u52A0\u5165\u6211\u4EEC\u7684\u661F\u7403\uFF0C\u4E00\u8D77\u5B66\u4E60\uFF0C\u4E00\u8D77\u5377\u3002\u3002"),k=e("strong",null,"\u7F16\u7A0B\u55B5",-1),_=t("\u{1F431}\u662F\u4E00\u4E2A Spring Boot+Vue \u7684\u524D\u540E\u7AEF\u5206\u79BB\u9879\u76EE\uFF0C\u878D\u5408\u4E86\u5E02\u9762\u4E0A\u7EDD\u5927\u591A\u6570\u6D41\u884C\u7684\u6280\u672F\u8981\u70B9\u3002\u901A\u8FC7\u5B66\u4E60\u5B9E\u6218\u9879\u76EE\uFF0C\u4F60\u53EF\u4EE5\u5C06\u6240\u5B66\u7684\u77E5\u8BC6\u901A\u8FC7\u5B9E\u8DF5\u8FDB\u884C\u68C0\u9A8C\u3001\u4F60\u53EF\u4EE5\u62D3\u5BBD\u81EA\u5DF1\u7684\u6280\u672F\u8FB9\u754C\uFF0C\u4F60\u53EF\u4EE5\u638C\u63E1\u4E00\u4E2A\u771F\u6B63\u7684\u5B9E\u6218\u9879\u76EE\u662F\u5982\u4F55\u4ECE 0 \u5230 1 \u7684\u3002"),y=e("hr",null,null,-1),q=e("h3",{id:"\u6E90\u7801\u5730\u5740",tabindex:"-1"},[e("a",{class:"header-anchor",href:"#\u6E90\u7801\u5730\u5740","aria-hidden":"true"},"#"),t(" \u6E90\u7801\u5730\u5740")],-1),x=t("\u7F16\u7A0B\u55B5\uFF1A"),T={href:"https://github.com/itwanger/coding-more",target:"_blank",rel:"noopener noreferrer"},w=t("https://github.com/itwanger/coding-more"),j={href:"https://github.com/itwanger/codingmore-learning/tree/main/codingmore-thymeleaf",target:"_blank",rel:"noopener noreferrer"},L=t("https://github.com/itwanger/codingmore-learning"),M=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png",alt:""})],-1);function C(R,S){const a=s("ExternalLinkIcon"),i=s("RouterLink");return c(),r("div",null,[u,e("blockquote",null,[e("p",null,[e("a",h,[m,n(a)])])]),v,e("p",null,[g,n(i,{to:"/springboot/docs/zhishixingqiu/"},{default:d(()=>[b]),_:1}),f,k,_]),y,q,e("blockquote",null,[e("ul",null,[e("li",null,[x,e("a",T,[w,n(a)])]),e("li",null,[e("a",j,[L,n(a)])])])]),M])}var B=o(p,[["render",C],["__file","thymeleaf.html.vue"]]);export{B as default};
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p><code>&lt;html lang=&quot;zh&quot; xmlns:th=&quot;http://www.thymeleaf.org&quot;&gt;</code> \u4E3A Thymeleaf \u7684\u547D\u540D\u7A7A\u95F4\uFF0C\u901A\u8FC7\u5F15\u5165\u547D\u540D\u7A7A\u95F4\u5C31\u53EF\u4EE5\u5728 HTML \u6587\u4EF6\u4E2D\u4F7F\u7528 Thymeleaf \u6807\u7B7E\u8BED\u8A00\uFF0C\u7528\u5173\u952E\u5B57 \u201Cth\u201D\u6765\u6807\u6CE8\u3002</p><p>\u7B2C\u4E94\u6B65\uFF0C\u542F\u52A8\u4E3B\u7C7B\uFF0C\u5982\u679C\u770B\u5230\u4EE5\u4E0B\u4FE1\u606F\u8868\u793A\u542F\u52A8\u6210\u529F\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/thymeleaf-3e636801-32df-4591-9159-fe83f771f68d.png" alt=""></p><p>\u7B2C\u516D\u6B65\uFF0C\u5728\u6D4F\u89C8\u5668\u5730\u5740\u680F\u91CC\u8F93\u5165 <code>http://localhost:8080/user/all</code> \u8BBF\u95EE\u63A5\u53E3\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/thymeleaf-e4b658fd-e30a-4b00-8818-ab00f8a28620.png" alt=""></p><h2 id="http-client" tabindex="-1"><a class="header-anchor" href="#http-client" aria-hidden="true">#</a> HTTP Client</h2><hr>`,20),m=t("\u66F4\u591A\u5185\u5BB9\uFF0C\u53EA\u9488\u5BF9\u300AJava \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF\u300B\u661F\u7403\u7528\u6237\u5F00\u653E\uFF0C\u9700\u8981\u7684\u5C0F\u4F19\u4F34\u53EF\u4EE5"),v={href:"https://tobebetterjavaer.com/zhishixingqiu/",target:"_blank",rel:"noopener noreferrer"},g=t("\u6233\u94FE\u63A5\u{1F517}"),b=t("\u52A0\u5165\u6211\u4EEC\u7684\u661F\u7403\uFF0C\u4E00\u8D77\u5B66\u4E60\uFF0C\u4E00\u8D77\u5377\u3002\u3002"),f=e("strong",null,"\u7F16\u7A0B\u55B5",-1),k=t("\u{1F431}\u662F\u4E00\u4E2A Spring Boot+Vue \u7684\u524D\u540E\u7AEF\u5206\u79BB\u9879\u76EE\uFF0C\u878D\u5408\u4E86\u5E02\u9762\u4E0A\u7EDD\u5927\u591A\u6570\u6D41\u884C\u7684\u6280\u672F\u8981\u70B9\u3002\u901A\u8FC7\u5B66\u4E60\u5B9E\u6218\u9879\u76EE\uFF0C\u4F60\u53EF\u4EE5\u5C06\u6240\u5B66\u7684\u77E5\u8BC6\u901A\u8FC7\u5B9E\u8DF5\u8FDB\u884C\u68C0\u9A8C\u3001\u4F60\u53EF\u4EE5\u62D3\u5BBD\u81EA\u5DF1\u7684\u6280\u672F\u8FB9\u754C\uFF0C\u4F60\u53EF\u4EE5\u638C\u63E1\u4E00\u4E2A\u771F\u6B63\u7684\u5B9E\u6218\u9879\u76EE\u662F\u5982\u4F55\u4ECE 0 \u5230 1 \u7684\u3002"),_=e("hr",null,null,-1),y=e("h2",{id:"\u6E90\u7801\u5730\u5740",tabindex:"-1"},[e("a",{class:"header-anchor",href:"#\u6E90\u7801\u5730\u5740","aria-hidden":"true"},"#"),t(" \u6E90\u7801\u5730\u5740")],-1),q=t("\u7F16\u7A0B\u55B5\uFF1A"),x={href:"https://github.com/itwanger/coding-more",target:"_blank",rel:"noopener noreferrer"},T=t("https://github.com/itwanger/coding-more"),w=t("codingmore-thymeleaf: "),j={href:"https://github.com/itwanger/codingmore-learning/tree/main/codingmore-thymeleaf",target:"_blank",rel:"noopener noreferrer"},M=t("https://github.com/itwanger/codingmore-learning"),L=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png",alt:""})],-1);function S(C,H){const n=i("ExternalLinkIcon");return o(),c("div",null,[d,e("blockquote",null,[e("p",null,[e("a",p,[u,a(n)])])]),h,e("p",null,[m,e("a",v,[g,a(n)]),b,f,k]),_,y,e("blockquote",null,[e("ul",null,[e("li",null,[q,e("a",x,[T,a(n)])]),e("li",null,[w,e("a",j,[M,a(n)])])])]),L])}var B=l(r,[["render",S],["__file","thymeleaf.html.vue"]]);export{B as default};
diff --git a/dist/assets/thymeleaf.html.1a24ed99.js b/dist/assets/thymeleaf.html.b2ef505e.js
similarity index 73%
rename from dist/assets/thymeleaf.html.1a24ed99.js
rename to dist/assets/thymeleaf.html.b2ef505e.js
index 3b343386..bef1b79a 100644
--- a/dist/assets/thymeleaf.html.1a24ed99.js
+++ b/dist/assets/thymeleaf.html.b2ef505e.js
@@ -1 +1 @@
-const e={key:"v-4d7a00b5",path:"/springboot/thymeleaf.html",title:"Spring Boot \u6574\u5408 Thymeleaf \u6A21\u677F\u5F15\u64CE",lang:"zh-CN",frontmatter:{category:["Java\u4F01\u4E1A\u7EA7\u5F00\u53D1"],tag:["Spring Boot"],title:"Spring Boot \u6574\u5408 Thymeleaf \u6A21\u677F\u5F15\u64CE",summary:"\u5173\u4E8E Thymeleaf Thymeleaf \u662F\u4E00\u4E2A\u4F18\u79C0\u7684\u3001\u9762\u5411 Java \u7684 HTML \u9875\u9762\u6A21\u677F\uFF0C\u5177\u6709\u4E30\u5BCC\u7684\u6807\u7B7E\u8BED\u8A00\u548C\u51FD\u6570\u3002\u5728 JSP \u88AB\u6DD8\u6C70\u4E4B\u540E\uFF0CThymeleaf \u53D6\u800C\u4EE3\u4E4B\u6210\u4E3A\u4E86 Spring Boot \u63A8\u8350\u7684\u6A21\u677F\u5F15\u64CE\u3002 Thymeleaf \u5728\u6709\u7F51\u548C\u6CA1\u7F51\u7684\u73AF\u5883\u4E0B\u90FD\u53EF\u4EE5\u6B63\u5E38\u5DE5\u4F5C\uFF0C\u65E2\u80FD\u8BA9\u7F8E\u5DE5\u5728\u6D4F\u89C8\u5668\u4E2D\u67E5\u770B\u9875\u9762\u7684\u9759\u6001\u6548\u679C\uFF0C\u4E5F\u80FD\u8BA9\u7A0B\u5E8F\u5458\u5728\u670D\u52A1\u5668\u67E5\u770B\u5E26\u6570\u636E\u7684\u52A8\u6001",head:[["meta",{property:"og:url",content:"https://tobebetterjavaer.com/springboot/thymeleaf.html"}],["meta",{property:"og:site_name",content:"Java \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF"}],["meta",{property:"og:title",content:"Spring Boot \u6574\u5408 Thymeleaf \u6A21\u677F\u5F15\u64CE"}],["meta",{property:"og:type",content:"article"}],["meta",{property:"og:updated_time",content:"2022-05-21T16:06:08.000Z"}],["meta",{property:"og:locale",content:"zh-CN"}],["meta",{property:"article:tag",content:"Spring Boot"}],["meta",{property:"article:modified_time",content:"2022-05-21T16:06:08.000Z"}]]},excerpt:"",headers:[{level:3,title:"\u5173\u4E8E Thymeleaf",slug:"\u5173\u4E8E-thymeleaf",children:[]},{level:3,title:"\u6574\u5408 Thymeleaf",slug:"\u6574\u5408-thymeleaf",children:[]},{level:3,title:"HTTP Client",slug:"http-client",children:[]},{level:3,title:"\u6E90\u7801\u5730\u5740",slug:"\u6E90\u7801\u5730\u5740",children:[]}],git:{createdTime:1653092056e3,updatedTime:1653149168e3,contributors:[{name:"itwanger",email:"www.qing_gee@163.com",commits:2}]},readingTime:{minutes:3.43,words:1030},filePathRelative:"springboot/thymeleaf.md"};export{e as data};
+const e={key:"v-4d7a00b5",path:"/springboot/thymeleaf.html",title:"Spring Boot \u6574\u5408 Thymeleaf \u6A21\u677F\u5F15\u64CE",lang:"zh-CN",frontmatter:{category:["Java\u4F01\u4E1A\u7EA7\u5F00\u53D1"],tag:["Spring Boot"],title:"Spring Boot \u6574\u5408 Thymeleaf \u6A21\u677F\u5F15\u64CE",summary:"\u5173\u4E8E Thymeleaf Thymeleaf \u662F\u4E00\u4E2A\u4F18\u79C0\u7684\u3001\u9762\u5411 Java \u7684 HTML \u9875\u9762\u6A21\u677F\uFF0C\u5177\u6709\u4E30\u5BCC\u7684\u6807\u7B7E\u8BED\u8A00\u548C\u51FD\u6570\u3002\u5728 JSP \u88AB\u6DD8\u6C70\u4E4B\u540E\uFF0CThymeleaf \u53D6\u800C\u4EE3\u4E4B\u6210\u4E3A\u4E86 Spring Boot \u63A8\u8350\u7684\u6A21\u677F\u5F15\u64CE\u3002 Thymeleaf \u5728\u6709\u7F51\u548C\u6CA1\u7F51\u7684\u73AF\u5883\u4E0B\u90FD\u53EF\u4EE5\u6B63\u5E38\u5DE5\u4F5C\uFF0C\u65E2\u80FD\u8BA9\u7F8E\u5DE5\u5728\u6D4F\u89C8\u5668\u4E2D\u67E5\u770B\u9875\u9762\u7684\u9759\u6001\u6548\u679C\uFF0C\u4E5F\u80FD\u8BA9\u7A0B\u5E8F\u5458\u5728\u670D\u52A1\u5668\u67E5\u770B\u5E26\u6570\u636E\u7684\u52A8\u6001",head:[["meta",{property:"og:url",content:"https://tobebetterjavaer.com/springboot/thymeleaf.html"}],["meta",{property:"og:site_name",content:"Java \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF"}],["meta",{property:"og:title",content:"Spring Boot \u6574\u5408 Thymeleaf \u6A21\u677F\u5F15\u64CE"}],["meta",{property:"og:type",content:"article"}],["meta",{property:"og:updated_time",content:"2022-06-10T11:28:25.000Z"}],["meta",{property:"og:locale",content:"zh-CN"}],["meta",{property:"article:tag",content:"Spring Boot"}],["meta",{property:"article:modified_time",content:"2022-06-10T11:28:25.000Z"}]]},excerpt:"",headers:[{level:2,title:"\u5173\u4E8E Thymeleaf",slug:"\u5173\u4E8E-thymeleaf",children:[]},{level:2,title:"\u6574\u5408 Thymeleaf",slug:"\u6574\u5408-thymeleaf",children:[]},{level:2,title:"HTTP Client",slug:"http-client",children:[]},{level:2,title:"\u6E90\u7801\u5730\u5740",slug:"\u6E90\u7801\u5730\u5740",children:[]}],git:{createdTime:1653092056e3,updatedTime:1654860505e3,contributors:[{name:"itwanger",email:"www.qing_gee@163.com",commits:3}]},readingTime:{minutes:3.44,words:1033},filePathRelative:"springboot/thymeleaf.md"};export{e as data};
diff --git a/dist/assets/tobebetterjavaer-wangzhan-shangxian.html.88c8d82b.js b/dist/assets/tobebetterjavaer-wangzhan-shangxian.html.eb4a3068.js
similarity index 99%
rename from dist/assets/tobebetterjavaer-wangzhan-shangxian.html.88c8d82b.js
rename to dist/assets/tobebetterjavaer-wangzhan-shangxian.html.eb4a3068.js
index 9cfca394..afaf1290 100644
--- a/dist/assets/tobebetterjavaer-wangzhan-shangxian.html.88c8d82b.js
+++ b/dist/assets/tobebetterjavaer-wangzhan-shangxian.html.eb4a3068.js
@@ -1,4 +1,4 @@
-import{_ as o}from"./plugin-vue_export-helper.21dcd24c.js";import{r as i,o as s,c as p,a as e,b as n,e as r,d as t}from"./app.a0271b9c.js";const b={},g=r('<h1 id="\u4F7F\u7528docsify-git-github-\u7801\u4E91-\u963F\u91CC\u4E91\u670D\u52A1\u5668\u642D\u5EFA\u77E5\u8BC6\u5E93\u7F51\u7AD9" tabindex="-1"><a class="header-anchor" href="#\u4F7F\u7528docsify-git-github-\u7801\u4E91-\u963F\u91CC\u4E91\u670D\u52A1\u5668\u642D\u5EFA\u77E5\u8BC6\u5E93\u7F51\u7AD9" aria-hidden="true">#</a> \u4F7F\u7528docsify+Git+GitHub+\u7801\u4E91+\u963F\u91CC\u4E91\u670D\u52A1\u5668\u642D\u5EFA\u77E5\u8BC6\u5E93\u7F51\u7AD9</h1><p>\u5927\u5BB6\u597D\uFF0C\u6211\u662F\u4E8C\u54E5\u5440\uFF01</p><p>2022 \u5E74 1 \u6708 1 \u65E5\uFF0C<strong>\u4E8C\u54E5\u7684\u300AJava \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF\u300B\u7F51\u7AD9\u7EC8\u4E8E\u4E0A\u7EBF\u4E86</strong>\uFF0110 \u5929\u8FC7\u53BB\u4E86\uFF0C\u7F51\u7AD9\u5728\u6CA1\u6709 SEO \u7684\u52A0\u6301\u4E0B\u8BBF\u95EE\u91CF\u4E5F\u7A81\u7834\u4E86 1000 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src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-wangzhan-shangxian-15.png" alt=""></p><p>OK\uFF0C\u6B64\u65F6\u518D\u8BBF\u95EE\u57DF\u540D <code>https://tobebetterjavaer.com</code> \u5C31\u53EF\u4EE5\u770B\u5230\u300AJava \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF\u300B\u7684\u5185\u5BB9\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-wangzhan-shangxian-16.png" alt=""></p><p>\u7528\u8FD9\u79CD\u65B9\u6848\u7684\u8BDD\uFF0C\u672C\u5730\u3001GitHub\u3001\u4E91\u670D\u52A1\u5668\u4E4B\u95F4\u7684\u540C\u6B65\u5C31\u5B8C\u5168\u6253\u901A\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-wangzhan-shangxian-17.png" alt=""></p><p>\u5F53 GitHub \u4E0A\u6709\u66F4\u65B0\u7684\u65F6\u5019\uFF0C\u518D\u5C06\u5185\u5BB9\u62C9\u53D6\u5230\u4E91\u670D\u52A1\u5668\u4E0A\u3002</p><p>\u4E3E\u4F8B\u6765\u8BF4\uFF0C\u6211\u4EEC\u5728\u300AJava 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alt=""></p><p>\u4E0D\u8FC7\uFF0C\u8FD9\u6709\u4E00\u70B9\u4E0D\u5C3D\u5584\u5C3D\u7F8E\uFF0C\u6BCF\u5F53 GitHub \u4E0A\u6709\u66F4\u65B0\u7684\u65F6\u5019\uFF0C\u8FD8\u8981\u624B\u52A8\u5728\u4E91\u670D\u52A1\u5668\u4E0A\u62C9\u53D6\u66F4\u65B0\uFF0C\u80FD\u4E0D\u80FD\u505A\u5230\u81EA\u52A8\u5316\u5462\uFF1F</p>',15),G=t("\u53EF\u4EE5\u5229\u7528"),H={href:"https://mp.weixin.qq.com/s/ditN9J80rSWwnYRumwb4ww",target:"_blank",rel:"noopener noreferrer"},J=t("\u5B9D\u5854\u9762\u677F"),P=t("\u7684\u8BA1\u5212\u4EFB\u52A1\uFF0C\u6DFB\u52A0\u4E00\u4E2A Shell \u811A\u672C\u3002"),k=r(`<p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-wangzhan-shangxian-21.png" alt=""></p><p>\u811A\u672C\u5185\u5BB9\u5F88\u7B80\u5355\uFF0C\u5C31\u4E24\u884C\u5185\u5BB9\uFF1A</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code># \u5207\u6362\u5230 git \u76EE\u5F55
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\u5E74\u4E8C\u54E5\u6536\u83B7\u7684\u6700\u540E\u4E00\u70B9\u70B9\u5C0F\u60CA\u559C\u4E86\u3002</p><p>\u539F\u6765\u7684\u300AJava \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF\u300B\u7F51\u7AD9\u662F\u6258\u7BA1\u5728\u7801\u4E91 Pages \u4E0A\u7684\uFF0C\u800C\u7801\u4E91 Pages \u6CA1\u529E\u6CD5\u81EA\u5B9A\u4E49\u57DF\u540D\uFF0C\u8FD9\u6837\u5C31\u5F88\u4E0D\u5229\u4E8E\u5C0F\u4F19\u4F34\u4EEC\u76F4\u63A5\u901A\u8FC7\u7F51\u5740\u53BB\u8BBF\u95EE\u3002</p><blockquote><p>\u7801\u4E91 Pages\uFF1Ahttps://itwanger.gitee.io/tobebetterjavaer</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-wangzhan-shangxian-02.png" alt=""></p><p>\u600E\u4E48\u89E3\u51B3\u8FD9\u4E2A\u95EE\u9898\u5462\uFF1F</p><p>\u3002\u3002\u3002\u3002\u3002\u3002</p><p>\u8BA9\u6211\u5148\u6765\u7ED9\u5927\u5BB6\u94FA\u57AB\u4E00\u4E0B\u8FD9\u4E2A\u7801\u4E91 Pages 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alt=""></p><p>\u901A\u8FC7\u7801\u4E91 Pages \u63D0\u4F9B\u7684\u7F51\u5740\u5C31\u53EF\u4EE5\u8BBF\u95EE\u300AJava \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF\u300B\u7F51\u5740\u4E86\u3002</p><p>\u4F46\u7531\u4E8E\u79CD\u79CD\u539F\u56E0\uFF0C\u7801\u4E91 Pages \u6CA1\u6709\u63D0\u4F9B\u81EA\u5B9A\u4E49\u57DF\u540D+ HTTPS \u7684\u670D\u52A1\uFF0CPro \u7248\u652F\u6301\uFF0C\u4F46\u4E5F\u56E0\u4E3A\u4E1A\u52A1\u8C03\u6574\uFF0C\u5173\u95ED\u4E86\u4E2A\u4EBA\u7528\u6237\u7684\u8D2D\u4E70\u5165\u53E3\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-wangzhan-shangxian-06.png" alt=""></p><p>\u8FD9\u5C31\u5F88\u626F\u4E86\u3002</p><h3 id="\u89E3\u51B3\u65B9\u6848\u4E00" tabindex="-1"><a class="header-anchor" href="#\u89E3\u51B3\u65B9\u6848\u4E00" aria-hidden="true">#</a> \u89E3\u51B3\u65B9\u6848\u4E00</h3><p>\u8FD9\u662F\u6700\u5BB9\u6613\u60F3\u5230\u7684\u529E\u6CD5\uFF0C\u4E5F\u662F\u6700\u7B28\u7684\u529E\u6CD5\uFF1A<strong>\u5C06\u672C\u5730\u4ED3\u5E93\u4E0A\u4F20\u5230\u4E91\u670D\u52A1\u5668\uFF0C\u901A\u8FC7 Nginx \u90E8\u7F72\u9759\u6001\u7F51\u7AD9</strong>\u3002</p><p>\u5728\u4E0A\u4F20\u670D\u52A1\u5668\u4E4B\u524D\uFF0C\u8BA9\u6211\u4EEC\u5148\u6765\u786E\u8BA4\u4E00\u4E0B\u672C\u5730\u7684 docsify \u76EE\u5F55\u662F\u5426\u662F\u5B8C\u6574\u7684\u3002\u56E0\u6B64\u6211\u4EEC\u9700\u8981\u5728\u672C\u5730\u8FD0\u884C\u8D77\u6765 docsify \u670D\u52A1\u3002</p><p>\u8FDB\u5165\u672C\u5730\u300AJava \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF\u300B\u7684\u4ED3\u5E93\u76EE\u5F55\uFF0C\u6267\u884C <code>docsify serve</code> \u542F\u52A8\u670D\u52A1\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-wangzhan-shangxian-07.png" alt=""></p><p>\u5728\u6D4F\u89C8\u5668\u5730\u5740\u680F\u8BBF\u95EE <code>http://localhost:3000</code>\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-wangzhan-shangxian-08.png" alt=""></p><p>\u53EF\u4EE5\u786E\u8BA4\u662F\u6CA1\u6709\u95EE\u9898\u7684\u3002</p><p>\u7136\u540E\u5C06\u672C\u5730\u7684\u6587\u4EF6\u4E0A\u4F20\u5230\u4E91\u670D\u52A1\u5668\u4E0A\uFF0C\u518D\u901A\u8FC7 Nginx \u90E8\u7F72\u9759\u6001\u7F51\u7AD9\u5C31 OK \u4E86\u3002</p><p>\u4E0D\u8FC7\uFF0C\u8FD9\u6837\u505A\u4F1A\u5B58\u5728\u4E00\u4E2A\u5F88\u4E25\u91CD\u7684\u95EE\u9898\uFF0C\u5C31\u662F\u4E91\u670D\u52A1\u5668\u548C\u672C\u5730\u3001GitHub \u4ED3\u5E93\u4E4B\u95F4\u6CA1\u529E\u6CD5\u8FDB\u884C\u540C\u6B65\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-wangzhan-shangxian-09.png" alt=""></p><h3 id="\u89E3\u51B3\u65B9\u6848\u4E8C" tabindex="-1"><a class="header-anchor" href="#\u89E3\u51B3\u65B9\u6848\u4E8C" aria-hidden="true">#</a> \u89E3\u51B3\u65B9\u6848\u4E8C</h3><p>\u8FD9\u662F\u6BD4\u8F83\u5B8C\u5584\u4E00\u70B9\u7684\u89E3\u51B3\u65B9\u6848\uFF1A<strong>\u5728\u670D\u52A1\u5668\u4E0A\u642D\u5EFA\u4E00\u4E2A Git \u4ED3\u5E93\uFF0C\u4ECE GitHub \u4E0A\u62C9\u53D6\uFF0C\u518D\u901A\u8FC7 Nginx \u90E8\u7F72\u9759\u6001\u7F51\u7AD9</strong>\u3002</p><p>\u8FD9\u6837\u5C31\u5F88\u5BB9\u6613\u89E3\u51B3\u6389\u4ED3\u5E93\u4E4B\u95F4\u4E0D\u540C\u6B65\u7684\u95EE\u9898\uFF0C\u56E0\u4E3A GitHub \u4ED3\u5E93\u63D0\u4EA4\u7684\u4E00\u5B9A\u662F\u6B63\u5F0F\u7248\u672C\uFF0C\u4E5F\u662F\u6700\u65B0\u7248\u672C\uFF0C\u4ECE\u4E0A\u9762\u62C9\u53D6\u662F\u6700\u65B9\u4FBF\u548C\u7A33\u59A5\u7684\u3002\u672C\u5730\u4F1A\u505A\u4E00\u4E9B\u6D4B\u8BD5\u5DE5\u4F5C\uFF0C\u6BD4\u5982\u8BF4\u8C03\u6574 docsify \u7684\u914D\u7F6E\u7B49\u7B49\uFF0C\u4E0D\u9002\u5408\u4F5C\u4E3A\u4E91\u670D\u52A1\u5668\u62C9\u53D6\u7684\u5BF9\u8C61\u3002</p><p>\u5173\u4E8E Git \u73AF\u5883\u7684\u642D\u5EFA\uFF0C\u6211\u5728\u300AJava \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF\u300B\u4E13\u680F\u7684\u300CGit\u300D\u7BC7\u91CC\u5DF2\u7ECF\u8BE6\u7EC6\u7684\u8BB2\u89E3\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-wangzhan-shangxian-10.png" alt=""></p><p>\u642D\u5EFA\u8FC7\u7A0B\u6211\u8FD9\u91CC\u7B80\u5355\u6F14\u793A\u4E0B\u3002</p><p><strong>\u7B2C\u4E00\u6B65\uFF0C\u5B89\u88C5 Git</strong></p><p>CentOS \u4E0A\u53EF\u4EE5\u76F4\u63A5\u901A\u8FC7 <code>yum install git</code> \u547D\u4EE4\u6765\u5B89\u88C5 Git \u73AF\u5883\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-wangzhan-shangxian-11.png" alt=""></p><p><strong>\u7B2C\u4E8C\u6B65\uFF0C\u521D\u59CB\u5316 Git</strong></p><p>\u6267\u884C <code>git init</code> \u521D\u59CB\u5316 Git \u76EE\u5F55\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-wangzhan-shangxian-12.png" alt=""></p><p><strong>\u7B2C\u4E09\u6B65\uFF0C\u514B\u9686 GitHub \u4ED3\u5E93\u5230\u4E91\u670D\u52A1\u5668</strong></p>',52),c=t("\u4E3A\u4E86\u4F7F GitHub \u76F8\u4FE1\u6240\u6709\u7684\u64CD\u4F5C\u90FD\u662F\u201C\u4F60\u672C\u4EBA\u201D\u64CD\u4F5C\u7684\uFF0C\u6240\u4EE5\u5728 clone \u4E4B\u524D\u9700\u8981\u5148\u914D\u7F6E SSH \u5BC6\u94A5\u3002\u5177\u4F53\u7684\u6B65\u9AA4\u53EF\u53C2\u8003\uFF1A"),h={href:"https://mp.weixin.qq.com/s/Fhh5-7AFDUThmd4tsyA55Q",target:"_blank",rel:"noopener noreferrer"},l=t("\u5D29\u6E83\uFF01\u5B9E\u4E60\u751F\u628A\u5C0F\u7EC4\u7684\u4EE3\u7801\u4ED3\u5E93\u641E\u5F97\u4E00\u56E2\u7CDF\u3002\u3002\u3002"),d=t("\u8FD9\u7BC7\u4E2D\u7684\u300C\u8FDC\u7A0B\u4ED3\u5E93\u300D\u5C0F\u8282\u3002"),v=e("p",null,"\u8FD9\u91CC\u5C31\u4E0D\u518D\u6F14\u793A\u4E86\u3002",-1),m=e("p",null,"\u5728 GitHub \u4ED3\u5E93\u4E0A\u70B9\u51FB\u300CCode\u300D\u83DC\u5355\uFF0C\u590D\u5236 SSH \u5730\u5740\u3002",-1),j=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-wangzhan-shangxian-13.png",alt:""})],-1),u=e("p",null,[t("\u7136\u540E\u6267\u884C "),e("code",null,"git clone"),t(" \u547D\u4EE4\u5C31\u53EF\u4EE5\u4ECE\u8FDC\u7A0B\u4ED3\u5E93\u4E0A\u62C9\u53D6\u5230\u6700\u65B0\u5185\u5BB9\u4E86\u3002")],-1),_=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-wangzhan-shangxian-14.png",alt:""})],-1),z=e("p",null,[e("strong",null,"\u7B2C\u56DB\u6B65\uFF0C\u901A\u8FC7 Nginx \u90E8\u7F72\u9759\u6001\u7F51\u7AD9")],-1),x={href:"https://mp.weixin.qq.com/s/OYOcjUwPZyPo8K4KAgJ4kw",target:"_blank",rel:"noopener noreferrer"},y=t("Nginx"),w=t(" \u975E\u5E38\u9002\u5408\u7528\u6765\u90E8\u7F72\u9759\u6001\u7F51\u7AD9\uFF0C\u53EA\u9700\u8981\u5C06\u670D\u52A1\u5668\u7684\u8BBF\u95EE\u76EE\u5F55\u8BBE\u5B9A\u4E3A index.html \u6587\u4EF6\u5C31\u53EF\u4EE5\u4E86\u3002"),f=r('<p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-wangzhan-shangxian-15.png" alt=""></p><p>OK\uFF0C\u6B64\u65F6\u518D\u8BBF\u95EE\u57DF\u540D <code>https://tobebetterjavaer.com</code> \u5C31\u53EF\u4EE5\u770B\u5230\u300AJava \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF\u300B\u7684\u5185\u5BB9\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-wangzhan-shangxian-16.png" alt=""></p><p>\u7528\u8FD9\u79CD\u65B9\u6848\u7684\u8BDD\uFF0C\u672C\u5730\u3001GitHub\u3001\u4E91\u670D\u52A1\u5668\u4E4B\u95F4\u7684\u540C\u6B65\u5C31\u5B8C\u5168\u6253\u901A\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-wangzhan-shangxian-17.png" alt=""></p><p>\u5F53 GitHub \u4E0A\u6709\u66F4\u65B0\u7684\u65F6\u5019\uFF0C\u518D\u5C06\u5185\u5BB9\u62C9\u53D6\u5230\u4E91\u670D\u52A1\u5668\u4E0A\u3002</p><p>\u4E3E\u4F8B\u6765\u8BF4\uFF0C\u6211\u4EEC\u5728\u300AJava \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF\u300B\u4E13\u680F\u7684 GitHub \u4ED3\u5E93\u4E2D\u4FEE\u6539 _sidebar.md \u6587\u4EF6\uFF0C\u8FFD\u52A0\u4E00\u4E2A\u611F\u53F9\u53F7\u7684\u6807\u70B9\u7B26\u53F7\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-wangzhan-shangxian-18.png" alt=""></p><p>\u6709\u4E24\u79CD\u529E\u6CD5\u62C9\u53D6\u3002</p><p>\u7B2C\u4E00\u79CD\uFF0C\u5148\u6267\u884C <code>git fetch</code>\uFF0C\u518D\u6267\u884C <code>git merge</code>\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-wangzhan-shangxian-19.png" alt=""></p><p><code>9909f82..7f4b815 master -&gt; origin/master</code> \u5C31\u8868\u793A\u5185\u5BB9\u6709\u53D8\u52A8\u3002</p><p>\u7B2C\u4E8C\u79CD\uFF0C\u76F4\u63A5\u6267\u884C <code>git pull</code> \u547D\u4EE4\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-wangzhan-shangxian-20.png" alt=""></p><p>\u4E0D\u8FC7\uFF0C\u8FD9\u6709\u4E00\u70B9\u4E0D\u5C3D\u5584\u5C3D\u7F8E\uFF0C\u6BCF\u5F53 GitHub \u4E0A\u6709\u66F4\u65B0\u7684\u65F6\u5019\uFF0C\u8FD8\u8981\u624B\u52A8\u5728\u4E91\u670D\u52A1\u5668\u4E0A\u62C9\u53D6\u66F4\u65B0\uFF0C\u80FD\u4E0D\u80FD\u505A\u5230\u81EA\u52A8\u5316\u5462\uFF1F</p>',15),G=t("\u53EF\u4EE5\u5229\u7528"),H={href:"https://mp.weixin.qq.com/s/ditN9J80rSWwnYRumwb4ww",target:"_blank",rel:"noopener noreferrer"},J=t("\u5B9D\u5854\u9762\u677F"),P=t("\u7684\u8BA1\u5212\u4EFB\u52A1\uFF0C\u6DFB\u52A0\u4E00\u4E2A Shell \u811A\u672C\u3002"),k=r(`<p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-wangzhan-shangxian-21.png" alt=""></p><p>\u811A\u672C\u5185\u5BB9\u5F88\u7B80\u5355\uFF0C\u5C31\u4E24\u884C\u5185\u5BB9\uFF1A</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code># \u5207\u6362\u5230 git \u76EE\u5F55
 cd /home/www/git/toBeBetterJavaer
 # \u6267\u884Cgit\u547D\u4EE4
 git pull
diff --git a/dist/assets/tomcat.html.3d86b543.js b/dist/assets/tomcat.html.af3e6ee8.js
similarity index 99%
rename from dist/assets/tomcat.html.3d86b543.js
rename to dist/assets/tomcat.html.af3e6ee8.js
index 75b13b28..925fbf2e 100644
--- a/dist/assets/tomcat.html.3d86b543.js
+++ b/dist/assets/tomcat.html.af3e6ee8.js
@@ -1,4 +1,4 @@
-import{_ as i}from"./plugin-vue_export-helper.21dcd24c.js";import{r,o as l,c as s,a as t,b as a,d as e,e as o}from"./app.a0271b9c.js";const d={},c=t("h1",{id:"spring-boot\u4E3A\u4EC0\u4E48\u4E0D\u9700\u8981\u989D\u5916\u5B89\u88C5tomcat",tabindex:"-1"},[t("a",{class:"header-anchor",href:"#spring-boot\u4E3A\u4EC0\u4E48\u4E0D\u9700\u8981\u989D\u5916\u5B89\u88C5tomcat","aria-hidden":"true"},"#"),e(" Spring Boot\u4E3A\u4EC0\u4E48\u4E0D\u9700\u8981\u989D\u5916\u5B89\u88C5Tomcat\uFF1F")],-1),g=t("p",null,"\u9996\u6B21\u63A5\u89E6 Spring Boot \u7684\u65F6\u5019\uFF0C\u7EDD\u5927\u591A\u6570\u5C0F\u4F19\u4F34\u5E94\u8BE5\u548C\u6211\u4E00\u6837\u597D\u5947\uFF1A",-1),p=t("blockquote",null,[t("p",null,"\u4E3A\u4EC0\u4E48 Spring Boot \u4E0D\u9700\u8981\u989D\u5916\u5B89\u88C5 Tomcat \u554A\uFF1F")],-1),v=t("p",null,"\u5230\u5E95\u4E3A\u4EC0\u4E48\u5462\uFF1F\u8BA9\u6211\u4EEC\u5E26\u7740\u597D\u5947\u5FC3\u5F00\u59CB\u4ECA\u5929\u7684\u65C5\u7A0B\u5427\u3002",-1),m=e("\u6253\u5F00"),b={href:"https://mp.weixin.qq.com/s/13La2GC5q4ZclEVqf6Mr9w",target:"_blank",rel:"noopener noreferrer"},u=e("\u4E0A\u4E00\u8282"),I=e("\u6211\u4EEC\u642D\u5EFA\u597D\u7684 tobebetterjavaer \u9879\u76EE\uFF0C\u627E\u5230 pom.xml \u6587\u4EF6\uFF0C\u53EF\u4EE5\u5728\u91CC\u9762\u770B\u5230\u4E00\u4E2A parent \u5C5E\u6027\uFF0C\u4EE3\u7801\u5982\u4E0B\uFF1A"),f=o(`<div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;parent&gt;
+import{_ as i}from"./plugin-vue_export-helper.21dcd24c.js";import{r,o as l,c as s,a as t,b as a,d as e,e as o}from"./app.615e41d8.js";const d={},c=t("h1",{id:"spring-boot\u4E3A\u4EC0\u4E48\u4E0D\u9700\u8981\u989D\u5916\u5B89\u88C5tomcat",tabindex:"-1"},[t("a",{class:"header-anchor",href:"#spring-boot\u4E3A\u4EC0\u4E48\u4E0D\u9700\u8981\u989D\u5916\u5B89\u88C5tomcat","aria-hidden":"true"},"#"),e(" Spring Boot\u4E3A\u4EC0\u4E48\u4E0D\u9700\u8981\u989D\u5916\u5B89\u88C5Tomcat\uFF1F")],-1),g=t("p",null,"\u9996\u6B21\u63A5\u89E6 Spring Boot \u7684\u65F6\u5019\uFF0C\u7EDD\u5927\u591A\u6570\u5C0F\u4F19\u4F34\u5E94\u8BE5\u548C\u6211\u4E00\u6837\u597D\u5947\uFF1A",-1),p=t("blockquote",null,[t("p",null,"\u4E3A\u4EC0\u4E48 Spring Boot \u4E0D\u9700\u8981\u989D\u5916\u5B89\u88C5 Tomcat \u554A\uFF1F")],-1),v=t("p",null,"\u5230\u5E95\u4E3A\u4EC0\u4E48\u5462\uFF1F\u8BA9\u6211\u4EEC\u5E26\u7740\u597D\u5947\u5FC3\u5F00\u59CB\u4ECA\u5929\u7684\u65C5\u7A0B\u5427\u3002",-1),m=e("\u6253\u5F00"),b={href:"https://mp.weixin.qq.com/s/13La2GC5q4ZclEVqf6Mr9w",target:"_blank",rel:"noopener noreferrer"},u=e("\u4E0A\u4E00\u8282"),I=e("\u6211\u4EEC\u642D\u5EFA\u597D\u7684 tobebetterjavaer \u9879\u76EE\uFF0C\u627E\u5230 pom.xml \u6587\u4EF6\uFF0C\u53EF\u4EE5\u5728\u91CC\u9762\u770B\u5230\u4E00\u4E2A parent \u5C5E\u6027\uFF0C\u4EE3\u7801\u5982\u4E0B\uFF1A"),f=o(`<div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;parent&gt;
 	&lt;groupId&gt;org.springframework.boot&lt;/groupId&gt;
 	&lt;artifactId&gt;spring-boot-starter-parent&lt;/artifactId&gt;
 	&lt;version&gt;2.6.1&lt;/version&gt;
diff --git a/dist/assets/transaction.html.c6ea47a0.js b/dist/assets/transaction.html.1d6a1548.js
similarity index 51%
rename from dist/assets/transaction.html.c6ea47a0.js
rename to dist/assets/transaction.html.1d6a1548.js
index 54e087e8..1f7b793b 100644
--- a/dist/assets/transaction.html.c6ea47a0.js
+++ b/dist/assets/transaction.html.1d6a1548.js
@@ -1 +1 @@
-const t={key:"v-33b6789c",path:"/springboot/transaction.html",title:"Spring Boot \u5982\u4F55\u5F00\u542F\u4E8B\u52A1\u652F\u6301\uFF1F",lang:"zh-CN",frontmatter:{category:["Java\u4F01\u4E1A\u7EA7\u5F00\u53D1"],tag:["Spring Boot"],title:"Spring Boot \u5982\u4F55\u5F00\u542F\u4E8B\u52A1\u652F\u6301\uFF1F",summary:"\u5173\u4E8E\u4E8B\u52A1 \u4E8B\u52A1\u5728\u903B\u8F91\u4E0A\u662F\u4E00\u7EC4\u64CD\u4F5C\uFF0C\u8981\u4E48\u6267\u884C\uFF0C\u8981\u4E0D\u90FD\u4E0D\u6267\u884C\u3002\u4E3B\u8981\u662F\u9488\u5BF9\u6570\u636E\u5E93\u800C\u8A00\u7684\uFF0C\u6BD4\u5982\u8BF4 MySQL\u3002 \u53EA\u8981\u8BB0\u4F4F\u8FD9\u4E00\u70B9\uFF0C\u7406\u89E3\u4E8B\u52A1\u5C31\u5F88\u5BB9\u6613\u4E86\u3002\u5728 Java \u4E2D\uFF0C\u6211\u4EEC\u901A\u5E38\u8981\u5728\u4E1A\u52A1\u91CC\u9762\u5904\u7406\u591A\u4E2A\u4E8B\u4EF6\uFF0C\u6BD4\u5982\u8BF4\u6211\u4EEC\u6709\u4E00\u4E2A\u4FDD\u5B58\u6587\u7AE0\u7684\u65B9\u6CD5\uFF0C\u5B83\u9664\u4E86\u8981\u4FDD\u5B58\u6587\u7AE0\u672C\u8EAB\u4E4B\u5916\uFF0C\u8FD8\u8981\u4FDD\u5B58\u6587\u7AE0\u5BF9\u5E94\u7684\u6807\u7B7E\uFF0C\u6807\u7B7E\u548C\u6587\u7AE0\u4E0D\u5728\u540C\u4E00\u4E2A\u8868\u91CC\uFF0C\u4F46\u4F1A\u901A\u8FC7\u5728\u6587\u7AE0\u8868\u91CC\uFF08posts\uFF09\u4FDD\u5B58\u6807\u7B7E\u4E3B\u952E\uFF08tag_id\uFF09",head:[["meta",{property:"og:url",content:"https://tobebetterjavaer.com/springboot/transaction.html"}],["meta",{property:"og:site_name",content:"Java \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF"}],["meta",{property:"og:title",content:"Spring Boot \u5982\u4F55\u5F00\u542F\u4E8B\u52A1\u652F\u6301\uFF1F"}],["meta",{property:"og:type",content:"article"}],["meta",{property:"og:updated_time",content:"2022-05-21T16:06:08.000Z"}],["meta",{property:"og:locale",content:"zh-CN"}],["meta",{property:"article:tag",content:"Spring Boot"}],["meta",{property:"article:modified_time",content:"2022-05-21T16:06:08.000Z"}]]},excerpt:"",headers:[{level:3,title:"\u5173\u4E8E\u4E8B\u52A1",slug:"\u5173\u4E8E\u4E8B\u52A1",children:[]},{level:3,title:"\u5173\u4E8E Spring \u5BF9\u4E8B\u52A1\u7684\u652F\u6301",slug:"\u5173\u4E8E-spring-\u5BF9\u4E8B\u52A1\u7684\u652F\u6301",children:[]},{level:3,title:"\u4E8B\u52A1\u7BA1\u7406\u6A21\u578B",slug:"\u4E8B\u52A1\u7BA1\u7406\u6A21\u578B",children:[]},{level:3,title:"\u5173\u4E8E Spring Boot \u5BF9\u4E8B\u52A1\u7684\u652F\u6301",slug:"\u5173\u4E8E-spring-boot-\u5BF9\u4E8B\u52A1\u7684\u652F\u6301",children:[]},{level:3,title:"\u6D4B\u8BD5\u4E8B\u52A1\u662F\u5426\u8D77\u6548",slug:"\u6D4B\u8BD5\u4E8B\u52A1\u662F\u5426\u8D77\u6548",children:[]}],git:{createdTime:1653092056e3,updatedTime:1653149168e3,contributors:[{name:"itwanger",email:"www.qing_gee@163.com",commits:2}]},readingTime:{minutes:13.6,words:4081},filePathRelative:"springboot/transaction.md"};export{t as data};
+const t={key:"v-33b6789c",path:"/springboot/transaction.html",title:"Spring Boot \u5982\u4F55\u5F00\u542F\u4E8B\u52A1\u652F\u6301\uFF1F",lang:"zh-CN",frontmatter:{category:["Java\u4F01\u4E1A\u7EA7\u5F00\u53D1"],tag:["Spring Boot"],title:"Spring Boot \u5982\u4F55\u5F00\u542F\u4E8B\u52A1\u652F\u6301\uFF1F",summary:"\u5173\u4E8E\u4E8B\u52A1 \u4E8B\u52A1\u5728\u903B\u8F91\u4E0A\u662F\u4E00\u7EC4\u64CD\u4F5C\uFF0C\u8981\u4E48\u6267\u884C\uFF0C\u8981\u4E0D\u90FD\u4E0D\u6267\u884C\u3002\u4E3B\u8981\u662F\u9488\u5BF9\u6570\u636E\u5E93\u800C\u8A00\u7684\uFF0C\u6BD4\u5982\u8BF4 MySQL\u3002 \u53EA\u8981\u8BB0\u4F4F\u8FD9\u4E00\u70B9\uFF0C\u7406\u89E3\u4E8B\u52A1\u5C31\u5F88\u5BB9\u6613\u4E86\u3002\u5728 Java \u4E2D\uFF0C\u6211\u4EEC\u901A\u5E38\u8981\u5728\u4E1A\u52A1\u91CC\u9762\u5904\u7406\u591A\u4E2A\u4E8B\u4EF6\uFF0C\u6BD4\u5982\u8BF4\u6211\u4EEC\u6709\u4E00\u4E2A\u4FDD\u5B58\u6587\u7AE0\u7684\u65B9\u6CD5\uFF0C\u5B83\u9664\u4E86\u8981\u4FDD\u5B58\u6587\u7AE0\u672C\u8EAB\u4E4B\u5916\uFF0C\u8FD8\u8981\u4FDD\u5B58\u6587\u7AE0\u5BF9\u5E94\u7684\u6807\u7B7E\uFF0C\u6807\u7B7E\u548C\u6587\u7AE0\u4E0D\u5728\u540C\u4E00\u4E2A\u8868\u91CC\uFF0C\u4F46\u4F1A\u901A\u8FC7\u5728\u6587\u7AE0\u8868\u91CC\uFF08posts\uFF09\u4FDD\u5B58\u6807\u7B7E\u4E3B\u952E\uFF08tag_id\uFF09",head:[["meta",{property:"og:url",content:"https://tobebetterjavaer.com/springboot/transaction.html"}],["meta",{property:"og:site_name",content:"Java \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF"}],["meta",{property:"og:title",content:"Spring Boot \u5982\u4F55\u5F00\u542F\u4E8B\u52A1\u652F\u6301\uFF1F"}],["meta",{property:"og:type",content:"article"}],["meta",{property:"og:updated_time",content:"2022-06-10T11:28:25.000Z"}],["meta",{property:"og:locale",content:"zh-CN"}],["meta",{property:"article:tag",content:"Spring Boot"}],["meta",{property:"article:modified_time",content:"2022-06-10T11:28:25.000Z"}]]},excerpt:"",headers:[{level:2,title:"\u5173\u4E8E\u4E8B\u52A1",slug:"\u5173\u4E8E\u4E8B\u52A1",children:[]},{level:2,title:"\u5173\u4E8E Spring \u5BF9\u4E8B\u52A1\u7684\u652F\u6301",slug:"\u5173\u4E8E-spring-\u5BF9\u4E8B\u52A1\u7684\u652F\u6301",children:[]},{level:2,title:"\u4E8B\u52A1\u7BA1\u7406\u6A21\u578B",slug:"\u4E8B\u52A1\u7BA1\u7406\u6A21\u578B",children:[{level:3,title:"\u4E8B\u52A1\u4F20\u64AD\u884C\u4E3A",slug:"\u4E8B\u52A1\u4F20\u64AD\u884C\u4E3A",children:[]},{level:3,title:"\u4E8B\u52A1\u9694\u79BB\u7EA7\u522B",slug:"\u4E8B\u52A1\u9694\u79BB\u7EA7\u522B",children:[]},{level:3,title:"\u4E8B\u52A1\u7684\u8D85\u65F6\u65F6\u95F4",slug:"\u4E8B\u52A1\u7684\u8D85\u65F6\u65F6\u95F4",children:[]},{level:3,title:"\u4E8B\u52A1\u7684\u53EA\u8BFB\u5C5E\u6027",slug:"\u4E8B\u52A1\u7684\u53EA\u8BFB\u5C5E\u6027",children:[]},{level:3,title:"\u4E8B\u52A1\u7684\u56DE\u6EDA\u7B56\u7565",slug:"\u4E8B\u52A1\u7684\u56DE\u6EDA\u7B56\u7565",children:[]}]},{level:2,title:"\u5173\u4E8E Spring Boot \u5BF9\u4E8B\u52A1\u7684\u652F\u6301",slug:"\u5173\u4E8E-spring-boot-\u5BF9\u4E8B\u52A1\u7684\u652F\u6301",children:[{level:3,title:"@Transactional \u7684\u4F5C\u7528\u8303\u56F4",slug:"transactional-\u7684\u4F5C\u7528\u8303\u56F4",children:[]},{level:3,title:"@Transactional \u7684\u5E38\u7528\u914D\u7F6E\u53C2\u6570",slug:"transactional-\u7684\u5E38\u7528\u914D\u7F6E\u53C2\u6570",children:[]},{level:3,title:"@Transactional \u7684\u4F7F\u7528\u6CE8\u610F\u4E8B\u9879\u603B\u7ED3",slug:"transactional-\u7684\u4F7F\u7528\u6CE8\u610F\u4E8B\u9879\u603B\u7ED3",children:[]}]},{level:2,title:"\u6D4B\u8BD5\u4E8B\u52A1\u662F\u5426\u8D77\u6548",slug:"\u6D4B\u8BD5\u4E8B\u52A1\u662F\u5426\u8D77\u6548",children:[]}],git:{createdTime:1653092056e3,updatedTime:1654860505e3,contributors:[{name:"itwanger",email:"www.qing_gee@163.com",commits:3}]},readingTime:{minutes:13.61,words:4082},filePathRelative:"springboot/transaction.md"};export{t as data};
diff --git a/dist/assets/transaction.html.89e3579f.js b/dist/assets/transaction.html.9982a65f.js
similarity index 90%
rename from dist/assets/transaction.html.89e3579f.js
rename to dist/assets/transaction.html.9982a65f.js
index 7dd497dd..e55c9247 100644
--- a/dist/assets/transaction.html.89e3579f.js
+++ b/dist/assets/transaction.html.9982a65f.js
@@ -1,10 +1,10 @@
-import{_ as i}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o as c,c as l,a as n,b as s,w as u,e,d as a}from"./app.a0271b9c.js";const r={},d=e(`<h3 id="\u5173\u4E8E\u4E8B\u52A1" tabindex="-1"><a class="header-anchor" href="#\u5173\u4E8E\u4E8B\u52A1" aria-hidden="true">#</a> \u5173\u4E8E\u4E8B\u52A1</h3><p>\u4E8B\u52A1\u5728\u903B\u8F91\u4E0A\u662F\u4E00\u7EC4\u64CD\u4F5C\uFF0C<strong>\u8981\u4E48\u6267\u884C\uFF0C\u8981\u4E0D\u90FD\u4E0D\u6267\u884C</strong>\u3002\u4E3B\u8981\u662F\u9488\u5BF9\u6570\u636E\u5E93\u800C\u8A00\u7684\uFF0C\u6BD4\u5982\u8BF4 MySQL\u3002</p><p>\u53EA\u8981\u8BB0\u4F4F\u8FD9\u4E00\u70B9\uFF0C\u7406\u89E3\u4E8B\u52A1\u5C31\u5F88\u5BB9\u6613\u4E86\u3002\u5728 Java \u4E2D\uFF0C\u6211\u4EEC\u901A\u5E38\u8981\u5728\u4E1A\u52A1\u91CC\u9762\u5904\u7406\u591A\u4E2A\u4E8B\u4EF6\uFF0C\u6BD4\u5982\u8BF4\u6211\u4EEC\u6709\u4E00\u4E2A\u4FDD\u5B58\u6587\u7AE0\u7684\u65B9\u6CD5\uFF0C\u5B83\u9664\u4E86\u8981\u4FDD\u5B58\u6587\u7AE0\u672C\u8EAB\u4E4B\u5916\uFF0C\u8FD8\u8981\u4FDD\u5B58\u6587\u7AE0\u5BF9\u5E94\u7684\u6807\u7B7E\uFF0C\u6807\u7B7E\u548C\u6587\u7AE0\u4E0D\u5728\u540C\u4E00\u4E2A\u8868\u91CC\uFF0C\u4F46\u4F1A\u901A\u8FC7\u5728\u6587\u7AE0\u8868\u91CC\uFF08posts\uFF09\u4FDD\u5B58\u6807\u7B7E\u4E3B\u952E\uFF08tag_id\uFF09\u6765\u5173\u8054\u6807\u7B7E\u8868\uFF08tags\uFF09\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">savePosts</span><span class="token punctuation">(</span><span class="token class-name">PostsParam</span> postsParam<span class="token punctuation">)</span> <span class="token punctuation">{</span>
+import{_ as p}from"./plugin-vue_export-helper.21dcd24c.js";import{r as o,o as i,c,a as n,b as t,e,d as a}from"./app.615e41d8.js";const l={},u=e(`<h2 id="\u5173\u4E8E\u4E8B\u52A1" tabindex="-1"><a class="header-anchor" href="#\u5173\u4E8E\u4E8B\u52A1" aria-hidden="true">#</a> \u5173\u4E8E\u4E8B\u52A1</h2><p>\u4E8B\u52A1\u5728\u903B\u8F91\u4E0A\u662F\u4E00\u7EC4\u64CD\u4F5C\uFF0C<strong>\u8981\u4E48\u6267\u884C\uFF0C\u8981\u4E0D\u90FD\u4E0D\u6267\u884C</strong>\u3002\u4E3B\u8981\u662F\u9488\u5BF9\u6570\u636E\u5E93\u800C\u8A00\u7684\uFF0C\u6BD4\u5982\u8BF4 MySQL\u3002</p><p>\u53EA\u8981\u8BB0\u4F4F\u8FD9\u4E00\u70B9\uFF0C\u7406\u89E3\u4E8B\u52A1\u5C31\u5F88\u5BB9\u6613\u4E86\u3002\u5728 Java \u4E2D\uFF0C\u6211\u4EEC\u901A\u5E38\u8981\u5728\u4E1A\u52A1\u91CC\u9762\u5904\u7406\u591A\u4E2A\u4E8B\u4EF6\uFF0C\u6BD4\u5982\u8BF4\u6211\u4EEC\u6709\u4E00\u4E2A\u4FDD\u5B58\u6587\u7AE0\u7684\u65B9\u6CD5\uFF0C\u5B83\u9664\u4E86\u8981\u4FDD\u5B58\u6587\u7AE0\u672C\u8EAB\u4E4B\u5916\uFF0C\u8FD8\u8981\u4FDD\u5B58\u6587\u7AE0\u5BF9\u5E94\u7684\u6807\u7B7E\uFF0C\u6807\u7B7E\u548C\u6587\u7AE0\u4E0D\u5728\u540C\u4E00\u4E2A\u8868\u91CC\uFF0C\u4F46\u4F1A\u901A\u8FC7\u5728\u6587\u7AE0\u8868\u91CC\uFF08posts\uFF09\u4FDD\u5B58\u6807\u7B7E\u4E3B\u952E\uFF08tag_id\uFF09\u6765\u5173\u8054\u6807\u7B7E\u8868\uFF08tags\uFF09\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">savePosts</span><span class="token punctuation">(</span><span class="token class-name">PostsParam</span> postsParam<span class="token punctuation">)</span> <span class="token punctuation">{</span>
   <span class="token comment">// \u4FDD\u5B58\u6587\u7AE0</span>
   <span class="token function">save</span><span class="token punctuation">(</span>posts<span class="token punctuation">)</span><span class="token punctuation">;</span>
   <span class="token comment">// \u5904\u7406\u6807\u7B7E</span>
   <span class="token function">insertOrUpdateTag</span><span class="token punctuation">(</span>postsParam<span class="token punctuation">,</span> posts<span class="token punctuation">)</span><span class="token punctuation">;</span>
 <span class="token punctuation">}</span>
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>\u90A3\u4E48\u6B64\u65F6\u5C31\u9700\u8981\u5F00\u542F\u4E8B\u52A1\uFF0C\u4FDD\u8BC1\u6587\u7AE0\u8868\u548C\u6807\u7B7E\u8868\u4E2D\u7684\u6570\u636E\u4FDD\u6301\u540C\u6B65\uFF0C\u8981\u4E48\u90FD\u6267\u884C\uFF0C\u8981\u4E48\u90FD\u4E0D\u6267\u884C\u3002</p><p>\u5426\u5219\u5C31\u6709\u53EF\u80FD\u9020\u6210\uFF0C\u6587\u7AE0\u4FDD\u5B58\u6210\u529F\u4E86\uFF0C\u4F46\u6807\u7B7E\u4FDD\u5B58\u5931\u8D25\u4E86\uFF0C\u6216\u8005\u6587\u7AE0\u4FDD\u5B58\u5931\u8D25\u4E86\uFF0C\u6807\u7B7E\u4FDD\u5B58\u6210\u529F\u4E86\u2014\u2014\u8FD9\u4E9B\u573A\u666F\u90FD\u4E0D\u7B26\u5408\u6211\u4EEC\u7684\u9884\u671F\u3002</p><p>\u4E3A\u4E86\u4FDD\u8BC1\u4E8B\u52A1\u662F\u6B63\u786E\u53EF\u9760\u7684\uFF0C\u5728\u6570\u636E\u5E93\u8FDB\u884C\u5199\u5165\u6216\u8005\u66F4\u65B0\u64CD\u4F5C\u65F6\uFF0C\u5C31\u5FC5\u987B\u5F97\u8868\u73B0\u51FA ACID \u7684 4 \u4E2A\u91CD\u8981\u7279\u6027\uFF1A</p><ul><li>\u539F\u5B50\u6027\uFF08Atomicity\uFF09\uFF1A\u4E00\u4E2A\u4E8B\u52A1\u4E2D\u7684\u6240\u6709\u64CD\u4F5C\uFF0C\u8981\u4E48\u5168\u90E8\u5B8C\u6210\uFF0C\u8981\u4E48\u5168\u90E8\u4E0D\u5B8C\u6210\uFF0C\u4E0D\u4F1A\u7ED3\u675F\u5728\u4E2D\u95F4\u67D0\u4E2A\u73AF\u8282\u3002\u4E8B\u52A1\u5728\u6267\u884C\u8FC7\u7A0B\u4E2D\u53D1\u751F\u9519\u8BEF\uFF0C\u4F1A\u88AB\u56DE\u6EDA\uFF08Rollback\uFF09\u5230\u4E8B\u52A1\u5F00\u59CB\u524D\u7684\u72B6\u6001\uFF0C\u5C31\u50CF\u8FD9\u4E2A\u4E8B\u52A1\u4ECE\u6765\u6CA1\u6709\u6267\u884C\u8FC7\u4E00\u6837\u3002</li><li>\u4E00\u81F4\u6027\uFF08Consistency\uFF09\uFF1A\u5728\u4E8B\u52A1\u5F00\u59CB\u4E4B\u524D\u548C\u4E8B\u52A1\u7ED3\u675F\u4EE5\u540E\uFF0C\u6570\u636E\u5E93\u7684\u5B8C\u6574\u6027\u6CA1\u6709\u88AB\u7834\u574F\u3002</li><li>\u4E8B\u52A1\u9694\u79BB\uFF08Isolation\uFF09\uFF1A\u6570\u636E\u5E93\u5141\u8BB8\u591A\u4E2A\u5E76\u53D1\u4E8B\u52A1\u540C\u65F6\u5BF9\u5176\u6570\u636E\u8FDB\u884C\u8BFB\u5199\u548C\u4FEE\u6539\uFF0C\u9694\u79BB\u6027\u53EF\u4EE5\u9632\u6B62\u591A\u4E2A\u4E8B\u52A1\u5E76\u53D1\u6267\u884C\u65F6\u7531\u4E8E\u4EA4\u53C9\u6267\u884C\u800C\u5BFC\u81F4\u6570\u636E\u7684\u4E0D\u4E00\u81F4\u3002</li><li>\u6301\u4E45\u6027\uFF08Durability\uFF09\uFF1A\u4E8B\u52A1\u5904\u7406\u7ED3\u675F\u540E\uFF0C\u5BF9\u6570\u636E\u7684\u4FEE\u6539\u5C31\u662F\u6C38\u4E45\u7684\uFF0C\u5373\u4FBF\u7CFB\u7EDF\u6545\u969C\u4E5F\u4E0D\u4F1A\u4E22\u5931\u3002</li></ul><p>\u5176\u4E2D\uFF0C\u4E8B\u52A1\u9694\u79BB\u53C8\u5206\u4E3A 4 \u79CD\u4E0D\u540C\u7684\u7EA7\u522B\uFF0C\u5305\u62EC\uFF1A</p><ul><li>\u672A\u63D0\u4EA4\u8BFB\uFF08Read uncommitted\uFF09\uFF0C\u6700\u4F4E\u7684\u9694\u79BB\u7EA7\u522B\uFF0C\u5141\u8BB8\u201C\u810F\u8BFB\u201D\uFF08dirty reads\uFF09\uFF0C\u4E8B\u52A1\u53EF\u4EE5\u770B\u5230\u5176\u4ED6\u4E8B\u52A1\u201C\u5C1A\u672A\u63D0\u4EA4\u201D\u7684\u4FEE\u6539\u3002\u5982\u679C\u53E6\u4E00\u4E2A\u4E8B\u52A1\u56DE\u6EDA\uFF0C\u90A3\u4E48\u5F53\u524D\u4E8B\u52A1\u8BFB\u5230\u7684\u6570\u636E\u5C31\u662F\u810F\u6570\u636E\u3002</li><li>\u63D0\u4EA4\u8BFB\uFF08read committed\uFF09\uFF0C\u4E00\u4E2A\u4E8B\u52A1\u53EF\u80FD\u4F1A\u9047\u5230\u4E0D\u53EF\u91CD\u590D\u8BFB\uFF08Non Repeatable Read\uFF09\u7684\u95EE\u9898\u3002\u4E0D\u53EF\u91CD\u590D\u8BFB\u662F\u6307\uFF0C\u5728\u4E00\u4E2A\u4E8B\u52A1\u5185\uFF0C\u591A\u6B21\u8BFB\u540C\u4E00\u6570\u636E\uFF0C\u5728\u8FD9\u4E2A\u4E8B\u52A1\u8FD8\u6CA1\u6709\u7ED3\u675F\u65F6\uFF0C\u5982\u679C\u53E6\u4E00\u4E2A\u4E8B\u52A1\u6070\u597D\u4FEE\u6539\u4E86\u8FD9\u4E2A\u6570\u636E\uFF0C\u90A3\u4E48\uFF0C\u5728\u7B2C\u4E00\u4E2A\u4E8B\u52A1\u4E2D\uFF0C\u4E24\u6B21\u8BFB\u53D6\u7684\u6570\u636E\u5C31\u53EF\u80FD\u4E0D\u4E00\u81F4\u3002</li><li>\u53EF\u91CD\u590D\u8BFB\uFF08repeatable read\uFF09\uFF0C\u4E00\u4E2A\u4E8B\u52A1\u53EF\u80FD\u4F1A\u9047\u5230\u5E7B\u8BFB\uFF08Phantom Read\uFF09\u7684\u95EE\u9898\u3002\u5E7B\u8BFB\u662F\u6307\uFF0C\u5728\u4E00\u4E2A\u4E8B\u52A1\u4E2D\uFF0C\u7B2C\u4E00\u6B21\u67E5\u8BE2\u67D0\u6761\u8BB0\u5F55\uFF0C\u53D1\u73B0\u6CA1\u6709\uFF0C\u4F46\u662F\uFF0C\u5F53\u8BD5\u56FE\u66F4\u65B0\u8FD9\u6761\u4E0D\u5B58\u5728\u7684\u8BB0\u5F55\u65F6\uFF0C\u7ADF\u7136\u80FD\u6210\u529F\uFF0C\u5E76\u4E14\uFF0C\u518D\u6B21\u8BFB\u53D6\u540C\u4E00\u6761\u8BB0\u5F55\uFF0C\u5B83\u5C31\u795E\u5947\u5730\u51FA\u73B0\u4E86\u3002</li><li>\u4E32\u884C\u5316\uFF08Serializable\uFF09\uFF0C\u6700\u4E25\u683C\u7684\u9694\u79BB\u7EA7\u522B\uFF0C\u6240\u6709\u4E8B\u52A1\u6309\u7167\u6B21\u5E8F\u4F9D\u6B21\u6267\u884C\uFF0C\u56E0\u6B64\uFF0C\u810F\u8BFB\u3001\u4E0D\u53EF\u91CD\u590D\u8BFB\u3001\u5E7B\u8BFB\u90FD\u4E0D\u4F1A\u51FA\u73B0\u3002\u867D\u7136 Serializable \u9694\u79BB\u7EA7\u522B\u4E0B\u7684\u4E8B\u52A1\u5177\u6709\u6700\u9AD8\u7684\u5B89\u5168\u6027\uFF0C\u4F46\u662F\uFF0C\u7531\u4E8E\u4E8B\u52A1\u662F\u4E32\u884C\u6267\u884C\uFF0C\u6240\u4EE5\u6548\u7387\u4F1A\u5927\u5927\u4E0B\u964D\uFF0C\u5E94\u7528\u7A0B\u5E8F\u7684\u6027\u80FD\u4F1A\u6025\u5267\u964D\u4F4E\u3002\u5982\u679C\u6CA1\u6709\u7279\u522B\u91CD\u8981\u7684\u60C5\u666F\uFF0C\u4E00\u822C\u90FD\u4E0D\u4F1A\u4F7F\u7528 Serializable \u9694\u79BB\u7EA7\u522B\u3002</li></ul><p>\u9700\u8981\u683C\u5916\u6CE8\u610F\u7684\u662F\uFF1A<strong>\u4E8B\u52A1\u80FD\u5426\u751F\u6548\uFF0C\u53D6\u51B3\u4E8E\u6570\u636E\u5E93\u5F15\u64CE\u662F\u5426\u652F\u6301\u4E8B\u52A1\uFF0CMySQL \u7684 InnoDB \u5F15\u64CE\u662F\u652F\u6301\u4E8B\u52A1\u7684\uFF0C\u4F46 MyISAM \u5C31\u4E0D\u652F\u6301</strong>\u3002</p><h3 id="\u5173\u4E8E-spring-\u5BF9\u4E8B\u52A1\u7684\u652F\u6301" tabindex="-1"><a class="header-anchor" href="#\u5173\u4E8E-spring-\u5BF9\u4E8B\u52A1\u7684\u652F\u6301" aria-hidden="true">#</a> \u5173\u4E8E Spring \u5BF9\u4E8B\u52A1\u7684\u652F\u6301</h3><p>Spring \u652F\u6301\u4E24\u79CD\u4E8B\u52A1\u65B9\u5F0F\uFF0C\u5206\u522B\u662F\u7F16\u7A0B\u5F0F\u4E8B\u52A1\u548C\u58F0\u660E\u5F0F\u4E8B\u52A1\uFF0C\u540E\u8005\u6700\u5E38\u89C1\uFF0C\u901A\u5E38\u60C5\u51B5\u4E0B\u53EA\u9700\u8981\u4E00\u4E2A <code>@Transactional</code> \u5C31\u641E\u5B9A\u4E86\uFF08\u4EE3\u7801\u4FB5\u5165\u6027\u964D\u5230\u4E86\u6700\u4F4E\uFF09\uFF0C\u5C31\u50CF\u8FD9\u6837\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token annotation punctuation">@Transactional</span>
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>\u90A3\u4E48\u6B64\u65F6\u5C31\u9700\u8981\u5F00\u542F\u4E8B\u52A1\uFF0C\u4FDD\u8BC1\u6587\u7AE0\u8868\u548C\u6807\u7B7E\u8868\u4E2D\u7684\u6570\u636E\u4FDD\u6301\u540C\u6B65\uFF0C\u8981\u4E48\u90FD\u6267\u884C\uFF0C\u8981\u4E48\u90FD\u4E0D\u6267\u884C\u3002</p><p>\u5426\u5219\u5C31\u6709\u53EF\u80FD\u9020\u6210\uFF0C\u6587\u7AE0\u4FDD\u5B58\u6210\u529F\u4E86\uFF0C\u4F46\u6807\u7B7E\u4FDD\u5B58\u5931\u8D25\u4E86\uFF0C\u6216\u8005\u6587\u7AE0\u4FDD\u5B58\u5931\u8D25\u4E86\uFF0C\u6807\u7B7E\u4FDD\u5B58\u6210\u529F\u4E86\u2014\u2014\u8FD9\u4E9B\u573A\u666F\u90FD\u4E0D\u7B26\u5408\u6211\u4EEC\u7684\u9884\u671F\u3002</p><p>\u4E3A\u4E86\u4FDD\u8BC1\u4E8B\u52A1\u662F\u6B63\u786E\u53EF\u9760\u7684\uFF0C\u5728\u6570\u636E\u5E93\u8FDB\u884C\u5199\u5165\u6216\u8005\u66F4\u65B0\u64CD\u4F5C\u65F6\uFF0C\u5C31\u5FC5\u987B\u5F97\u8868\u73B0\u51FA ACID \u7684 4 \u4E2A\u91CD\u8981\u7279\u6027\uFF1A</p><ul><li>\u539F\u5B50\u6027\uFF08Atomicity\uFF09\uFF1A\u4E00\u4E2A\u4E8B\u52A1\u4E2D\u7684\u6240\u6709\u64CD\u4F5C\uFF0C\u8981\u4E48\u5168\u90E8\u5B8C\u6210\uFF0C\u8981\u4E48\u5168\u90E8\u4E0D\u5B8C\u6210\uFF0C\u4E0D\u4F1A\u7ED3\u675F\u5728\u4E2D\u95F4\u67D0\u4E2A\u73AF\u8282\u3002\u4E8B\u52A1\u5728\u6267\u884C\u8FC7\u7A0B\u4E2D\u53D1\u751F\u9519\u8BEF\uFF0C\u4F1A\u88AB\u56DE\u6EDA\uFF08Rollback\uFF09\u5230\u4E8B\u52A1\u5F00\u59CB\u524D\u7684\u72B6\u6001\uFF0C\u5C31\u50CF\u8FD9\u4E2A\u4E8B\u52A1\u4ECE\u6765\u6CA1\u6709\u6267\u884C\u8FC7\u4E00\u6837\u3002</li><li>\u4E00\u81F4\u6027\uFF08Consistency\uFF09\uFF1A\u5728\u4E8B\u52A1\u5F00\u59CB\u4E4B\u524D\u548C\u4E8B\u52A1\u7ED3\u675F\u4EE5\u540E\uFF0C\u6570\u636E\u5E93\u7684\u5B8C\u6574\u6027\u6CA1\u6709\u88AB\u7834\u574F\u3002</li><li>\u4E8B\u52A1\u9694\u79BB\uFF08Isolation\uFF09\uFF1A\u6570\u636E\u5E93\u5141\u8BB8\u591A\u4E2A\u5E76\u53D1\u4E8B\u52A1\u540C\u65F6\u5BF9\u5176\u6570\u636E\u8FDB\u884C\u8BFB\u5199\u548C\u4FEE\u6539\uFF0C\u9694\u79BB\u6027\u53EF\u4EE5\u9632\u6B62\u591A\u4E2A\u4E8B\u52A1\u5E76\u53D1\u6267\u884C\u65F6\u7531\u4E8E\u4EA4\u53C9\u6267\u884C\u800C\u5BFC\u81F4\u6570\u636E\u7684\u4E0D\u4E00\u81F4\u3002</li><li>\u6301\u4E45\u6027\uFF08Durability\uFF09\uFF1A\u4E8B\u52A1\u5904\u7406\u7ED3\u675F\u540E\uFF0C\u5BF9\u6570\u636E\u7684\u4FEE\u6539\u5C31\u662F\u6C38\u4E45\u7684\uFF0C\u5373\u4FBF\u7CFB\u7EDF\u6545\u969C\u4E5F\u4E0D\u4F1A\u4E22\u5931\u3002</li></ul><p>\u5176\u4E2D\uFF0C\u4E8B\u52A1\u9694\u79BB\u53C8\u5206\u4E3A 4 \u79CD\u4E0D\u540C\u7684\u7EA7\u522B\uFF0C\u5305\u62EC\uFF1A</p><ul><li>\u672A\u63D0\u4EA4\u8BFB\uFF08Read uncommitted\uFF09\uFF0C\u6700\u4F4E\u7684\u9694\u79BB\u7EA7\u522B\uFF0C\u5141\u8BB8\u201C\u810F\u8BFB\u201D\uFF08dirty reads\uFF09\uFF0C\u4E8B\u52A1\u53EF\u4EE5\u770B\u5230\u5176\u4ED6\u4E8B\u52A1\u201C\u5C1A\u672A\u63D0\u4EA4\u201D\u7684\u4FEE\u6539\u3002\u5982\u679C\u53E6\u4E00\u4E2A\u4E8B\u52A1\u56DE\u6EDA\uFF0C\u90A3\u4E48\u5F53\u524D\u4E8B\u52A1\u8BFB\u5230\u7684\u6570\u636E\u5C31\u662F\u810F\u6570\u636E\u3002</li><li>\u63D0\u4EA4\u8BFB\uFF08read committed\uFF09\uFF0C\u4E00\u4E2A\u4E8B\u52A1\u53EF\u80FD\u4F1A\u9047\u5230\u4E0D\u53EF\u91CD\u590D\u8BFB\uFF08Non Repeatable Read\uFF09\u7684\u95EE\u9898\u3002\u4E0D\u53EF\u91CD\u590D\u8BFB\u662F\u6307\uFF0C\u5728\u4E00\u4E2A\u4E8B\u52A1\u5185\uFF0C\u591A\u6B21\u8BFB\u540C\u4E00\u6570\u636E\uFF0C\u5728\u8FD9\u4E2A\u4E8B\u52A1\u8FD8\u6CA1\u6709\u7ED3\u675F\u65F6\uFF0C\u5982\u679C\u53E6\u4E00\u4E2A\u4E8B\u52A1\u6070\u597D\u4FEE\u6539\u4E86\u8FD9\u4E2A\u6570\u636E\uFF0C\u90A3\u4E48\uFF0C\u5728\u7B2C\u4E00\u4E2A\u4E8B\u52A1\u4E2D\uFF0C\u4E24\u6B21\u8BFB\u53D6\u7684\u6570\u636E\u5C31\u53EF\u80FD\u4E0D\u4E00\u81F4\u3002</li><li>\u53EF\u91CD\u590D\u8BFB\uFF08repeatable read\uFF09\uFF0C\u4E00\u4E2A\u4E8B\u52A1\u53EF\u80FD\u4F1A\u9047\u5230\u5E7B\u8BFB\uFF08Phantom Read\uFF09\u7684\u95EE\u9898\u3002\u5E7B\u8BFB\u662F\u6307\uFF0C\u5728\u4E00\u4E2A\u4E8B\u52A1\u4E2D\uFF0C\u7B2C\u4E00\u6B21\u67E5\u8BE2\u67D0\u6761\u8BB0\u5F55\uFF0C\u53D1\u73B0\u6CA1\u6709\uFF0C\u4F46\u662F\uFF0C\u5F53\u8BD5\u56FE\u66F4\u65B0\u8FD9\u6761\u4E0D\u5B58\u5728\u7684\u8BB0\u5F55\u65F6\uFF0C\u7ADF\u7136\u80FD\u6210\u529F\uFF0C\u5E76\u4E14\uFF0C\u518D\u6B21\u8BFB\u53D6\u540C\u4E00\u6761\u8BB0\u5F55\uFF0C\u5B83\u5C31\u795E\u5947\u5730\u51FA\u73B0\u4E86\u3002</li><li>\u4E32\u884C\u5316\uFF08Serializable\uFF09\uFF0C\u6700\u4E25\u683C\u7684\u9694\u79BB\u7EA7\u522B\uFF0C\u6240\u6709\u4E8B\u52A1\u6309\u7167\u6B21\u5E8F\u4F9D\u6B21\u6267\u884C\uFF0C\u56E0\u6B64\uFF0C\u810F\u8BFB\u3001\u4E0D\u53EF\u91CD\u590D\u8BFB\u3001\u5E7B\u8BFB\u90FD\u4E0D\u4F1A\u51FA\u73B0\u3002\u867D\u7136 Serializable \u9694\u79BB\u7EA7\u522B\u4E0B\u7684\u4E8B\u52A1\u5177\u6709\u6700\u9AD8\u7684\u5B89\u5168\u6027\uFF0C\u4F46\u662F\uFF0C\u7531\u4E8E\u4E8B\u52A1\u662F\u4E32\u884C\u6267\u884C\uFF0C\u6240\u4EE5\u6548\u7387\u4F1A\u5927\u5927\u4E0B\u964D\uFF0C\u5E94\u7528\u7A0B\u5E8F\u7684\u6027\u80FD\u4F1A\u6025\u5267\u964D\u4F4E\u3002\u5982\u679C\u6CA1\u6709\u7279\u522B\u91CD\u8981\u7684\u60C5\u666F\uFF0C\u4E00\u822C\u90FD\u4E0D\u4F1A\u4F7F\u7528 Serializable \u9694\u79BB\u7EA7\u522B\u3002</li></ul><p>\u9700\u8981\u683C\u5916\u6CE8\u610F\u7684\u662F\uFF1A<strong>\u4E8B\u52A1\u80FD\u5426\u751F\u6548\uFF0C\u53D6\u51B3\u4E8E\u6570\u636E\u5E93\u5F15\u64CE\u662F\u5426\u652F\u6301\u4E8B\u52A1\uFF0CMySQL \u7684 InnoDB \u5F15\u64CE\u662F\u652F\u6301\u4E8B\u52A1\u7684\uFF0C\u4F46 MyISAM \u5C31\u4E0D\u652F\u6301</strong>\u3002</p><h2 id="\u5173\u4E8E-spring-\u5BF9\u4E8B\u52A1\u7684\u652F\u6301" tabindex="-1"><a class="header-anchor" href="#\u5173\u4E8E-spring-\u5BF9\u4E8B\u52A1\u7684\u652F\u6301" aria-hidden="true">#</a> \u5173\u4E8E Spring \u5BF9\u4E8B\u52A1\u7684\u652F\u6301</h2><p>Spring \u652F\u6301\u4E24\u79CD\u4E8B\u52A1\u65B9\u5F0F\uFF0C\u5206\u522B\u662F\u7F16\u7A0B\u5F0F\u4E8B\u52A1\u548C\u58F0\u660E\u5F0F\u4E8B\u52A1\uFF0C\u540E\u8005\u6700\u5E38\u89C1\uFF0C\u901A\u5E38\u60C5\u51B5\u4E0B\u53EA\u9700\u8981\u4E00\u4E2A <code>@Transactional</code> \u5C31\u641E\u5B9A\u4E86\uFF08\u4EE3\u7801\u4FB5\u5165\u6027\u964D\u5230\u4E86\u6700\u4F4E\uFF09\uFF0C\u5C31\u50CF\u8FD9\u6837\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token annotation punctuation">@Transactional</span>
 <span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">savePosts</span><span class="token punctuation">(</span><span class="token class-name">PostsParam</span> postsParam<span class="token punctuation">)</span> <span class="token punctuation">{</span>
   <span class="token comment">// \u4FDD\u5B58\u6587\u7AE0</span>
   <span class="token function">save</span><span class="token punctuation">(</span>posts<span class="token punctuation">)</span><span class="token punctuation">;</span>
@@ -43,7 +43,7 @@ import{_ as i}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o as c,
               transactionManager<span class="token punctuation">.</span><span class="token function">rollback</span><span class="token punctuation">(</span>status<span class="token punctuation">)</span><span class="token punctuation">;</span>
           <span class="token punctuation">}</span>
 <span class="token punctuation">}</span>
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>\u5C31\u7F16\u7A0B\u5F0F\u4E8B\u52A1\u7BA1\u7406\u800C\u8A00\uFF0CSpring \u66F4\u63A8\u8350\u4F7F\u7528 TransactionTemplate\u3002</p><p>\u5728\u7F16\u7A0B\u5F0F\u4E8B\u52A1\u4E2D\uFF0C\u5FC5\u987B\u5728\u6BCF\u4E2A\u4E1A\u52A1\u64CD\u4F5C\u4E2D\u5305\u542B\u989D\u5916\u7684\u4E8B\u52A1\u7BA1\u7406\u4EE3\u7801\uFF0C\u5C31\u5BFC\u81F4\u4EE3\u7801\u770B\u8D77\u6765\u975E\u5E38\u7684\u81C3\u80BF\uFF0C\u4F46\u5BF9\u7406\u89E3 Spring \u7684\u4E8B\u52A1\u7BA1\u7406\u6A21\u578B\u975E\u5E38\u6709\u5E2E\u52A9\u3002</p><p><strong>2\uFF09\u58F0\u660E\u5F0F\u4E8B\u52A1</strong></p><p>\u58F0\u660E\u5F0F\u4E8B\u52A1\u5C06\u4E8B\u52A1\u7BA1\u7406\u4EE3\u7801\u4ECE\u4E1A\u52A1\u65B9\u6CD5\u4E2D\u62BD\u79BB\u4E86\u51FA\u6765\uFF0C\u4EE5\u58F0\u660E\u5F0F\u7684\u65B9\u5F0F\u6765\u5B9E\u73B0\u4E8B\u52A1\u7BA1\u7406\uFF0C\u5BF9\u4E8E\u5F00\u53D1\u8005\u6765\u8BF4\uFF0C\u58F0\u660E\u5F0F\u4E8B\u52A1\u663E\u7136\u6BD4\u7F16\u7A0B\u5F0F\u4E8B\u52A1\u66F4\u6613\u7528\u3001\u66F4\u597D\u7528\u3002</p>`,24),k=a("\u5F53\u7136\u4E86\uFF0C\u8981\u60F3\u5B9E\u73B0\u4E8B\u52A1\u7BA1\u7406\u548C\u4E1A\u52A1\u4EE3\u7801\u7684\u62BD\u79BB\uFF0C\u5C31\u5FC5\u987B\u5F97\u7528\u5230 Spring \u5F53\u4E2D\u6700\u5173\u952E\u6700\u6838\u5FC3\u7684\u6280\u672F\u4E4B\u4E00\uFF0C"),v={href:"https://tobebetterjavaer.com/springboot/aop-log.html",target:"_blank",rel:"noopener noreferrer"},m=a("AOP"),b=a("\uFF0C\u5176\u672C\u8D28\u662F\u5BF9\u65B9\u6CD5\u524D\u540E\u8FDB\u884C\u62E6\u622A\uFF0C\u7136\u540E\u5728\u76EE\u6807\u65B9\u6CD5\u5F00\u59CB\u4E4B\u524D\u521B\u5EFA\u6216\u8005\u52A0\u5165\u4E00\u4E2A\u4E8B\u52A1\uFF0C\u6267\u884C\u5B8C\u76EE\u6807\u65B9\u6CD5\u4E4B\u540E\u6839\u636E\u6267\u884C\u7684\u60C5\u51B5\u63D0\u4EA4\u6216\u8005\u56DE\u6EDA\u3002"),h=e(`<p><strong>\u58F0\u660E\u5F0F\u4E8B\u52A1\u867D\u7136\u4F18\u4E8E\u7F16\u7A0B\u5F0F\u4E8B\u52A1\uFF0C\u4F46\u4E5F\u6709\u4E0D\u8DB3\uFF0C\u58F0\u660E\u5F0F\u4E8B\u52A1\u7BA1\u7406\u7684\u7C92\u5EA6\u662F\u65B9\u6CD5\u7EA7\u522B\uFF0C\u800C\u7F16\u7A0B\u5F0F\u4E8B\u52A1\u662F\u53EF\u4EE5\u7CBE\u786E\u5230\u4EE3\u7801\u5757\u7EA7\u522B\u7684</strong>\u3002</p><h3 id="\u4E8B\u52A1\u7BA1\u7406\u6A21\u578B" tabindex="-1"><a class="header-anchor" href="#\u4E8B\u52A1\u7BA1\u7406\u6A21\u578B" aria-hidden="true">#</a> \u4E8B\u52A1\u7BA1\u7406\u6A21\u578B</h3><p>Spring \u5C06\u4E8B\u52A1\u7BA1\u7406\u7684\u6838\u5FC3\u62BD\u8C61\u4E3A\u4E00\u4E2A\u4E8B\u52A1\u7BA1\u7406\u5668\uFF08TransactionManager\uFF09\uFF0C\u5B83\u7684\u6E90\u7801\u53EA\u6709\u4E00\u4E2A\u7B80\u5355\u7684\u63A5\u53E3\u5B9A\u4E49\uFF0C\u5C5E\u4E8E\u4E00\u4E2A\u6807\u8BB0\u63A5\u53E3\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">interface</span> <span class="token class-name">TransactionManager</span> <span class="token punctuation">{</span>
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>\u5C31\u7F16\u7A0B\u5F0F\u4E8B\u52A1\u7BA1\u7406\u800C\u8A00\uFF0CSpring \u66F4\u63A8\u8350\u4F7F\u7528 TransactionTemplate\u3002</p><p>\u5728\u7F16\u7A0B\u5F0F\u4E8B\u52A1\u4E2D\uFF0C\u5FC5\u987B\u5728\u6BCF\u4E2A\u4E1A\u52A1\u64CD\u4F5C\u4E2D\u5305\u542B\u989D\u5916\u7684\u4E8B\u52A1\u7BA1\u7406\u4EE3\u7801\uFF0C\u5C31\u5BFC\u81F4\u4EE3\u7801\u770B\u8D77\u6765\u975E\u5E38\u7684\u81C3\u80BF\uFF0C\u4F46\u5BF9\u7406\u89E3 Spring \u7684\u4E8B\u52A1\u7BA1\u7406\u6A21\u578B\u975E\u5E38\u6709\u5E2E\u52A9\u3002</p><p><strong>2\uFF09\u58F0\u660E\u5F0F\u4E8B\u52A1</strong></p><p>\u58F0\u660E\u5F0F\u4E8B\u52A1\u5C06\u4E8B\u52A1\u7BA1\u7406\u4EE3\u7801\u4ECE\u4E1A\u52A1\u65B9\u6CD5\u4E2D\u62BD\u79BB\u4E86\u51FA\u6765\uFF0C\u4EE5\u58F0\u660E\u5F0F\u7684\u65B9\u5F0F\u6765\u5B9E\u73B0\u4E8B\u52A1\u7BA1\u7406\uFF0C\u5BF9\u4E8E\u5F00\u53D1\u8005\u6765\u8BF4\uFF0C\u58F0\u660E\u5F0F\u4E8B\u52A1\u663E\u7136\u6BD4\u7F16\u7A0B\u5F0F\u4E8B\u52A1\u66F4\u6613\u7528\u3001\u66F4\u597D\u7528\u3002</p>`,24),r=a("\u5F53\u7136\u4E86\uFF0C\u8981\u60F3\u5B9E\u73B0\u4E8B\u52A1\u7BA1\u7406\u548C\u4E1A\u52A1\u4EE3\u7801\u7684\u62BD\u79BB\uFF0C\u5C31\u5FC5\u987B\u5F97\u7528\u5230 Spring \u5F53\u4E2D\u6700\u5173\u952E\u6700\u6838\u5FC3\u7684\u6280\u672F\u4E4B\u4E00\uFF0C"),d={href:"https://tobebetterjavaer.com/springboot/aop-log.html",target:"_blank",rel:"noopener noreferrer"},k=a("AOP"),v=a("\uFF0C\u5176\u672C\u8D28\u662F\u5BF9\u65B9\u6CD5\u524D\u540E\u8FDB\u884C\u62E6\u622A\uFF0C\u7136\u540E\u5728\u76EE\u6807\u65B9\u6CD5\u5F00\u59CB\u4E4B\u524D\u521B\u5EFA\u6216\u8005\u52A0\u5165\u4E00\u4E2A\u4E8B\u52A1\uFF0C\u6267\u884C\u5B8C\u76EE\u6807\u65B9\u6CD5\u4E4B\u540E\u6839\u636E\u6267\u884C\u7684\u60C5\u51B5\u63D0\u4EA4\u6216\u8005\u56DE\u6EDA\u3002"),m=e(`<p><strong>\u58F0\u660E\u5F0F\u4E8B\u52A1\u867D\u7136\u4F18\u4E8E\u7F16\u7A0B\u5F0F\u4E8B\u52A1\uFF0C\u4F46\u4E5F\u6709\u4E0D\u8DB3\uFF0C\u58F0\u660E\u5F0F\u4E8B\u52A1\u7BA1\u7406\u7684\u7C92\u5EA6\u662F\u65B9\u6CD5\u7EA7\u522B\uFF0C\u800C\u7F16\u7A0B\u5F0F\u4E8B\u52A1\u662F\u53EF\u4EE5\u7CBE\u786E\u5230\u4EE3\u7801\u5757\u7EA7\u522B\u7684</strong>\u3002</p><h2 id="\u4E8B\u52A1\u7BA1\u7406\u6A21\u578B" tabindex="-1"><a class="header-anchor" href="#\u4E8B\u52A1\u7BA1\u7406\u6A21\u578B" aria-hidden="true">#</a> \u4E8B\u52A1\u7BA1\u7406\u6A21\u578B</h2><p>Spring \u5C06\u4E8B\u52A1\u7BA1\u7406\u7684\u6838\u5FC3\u62BD\u8C61\u4E3A\u4E00\u4E2A\u4E8B\u52A1\u7BA1\u7406\u5668\uFF08TransactionManager\uFF09\uFF0C\u5B83\u7684\u6E90\u7801\u53EA\u6709\u4E00\u4E2A\u7B80\u5355\u7684\u63A5\u53E3\u5B9A\u4E49\uFF0C\u5C5E\u4E8E\u4E00\u4E2A\u6807\u8BB0\u63A5\u53E3\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">interface</span> <span class="token class-name">TransactionManager</span> <span class="token punctuation">{</span>
 
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>\u8BE5\u63A5\u53E3\u6709\u4E24\u4E2A\u5B50\u63A5\u53E3\uFF0C\u5206\u522B\u662F\u7F16\u7A0B\u5F0F\u4E8B\u52A1\u63A5\u53E3 ReactiveTransactionManager \u548C\u58F0\u660E\u5F0F\u4E8B\u52A1\u63A5\u53E3 PlatformTransactionManager\u3002\u6211\u4EEC\u6765\u91CD\u70B9\u8BF4\u8BF4 PlatformTransactionManager\uFF0C\u8BE5\u63A5\u53E3\u5B9A\u4E49\u4E86 3 \u4E2A\u63A5\u53E3\u65B9\u6CD5\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">interface</span> <span class="token class-name">PlatformTransactionManager</span> <span class="token keyword">extends</span> <span class="token class-name">TransactionManager</span><span class="token punctuation">{</span>
@@ -91,7 +91,7 @@ import{_ as i}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o as c,
   <span class="token keyword">boolean</span> <span class="token function">readOnly</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token keyword">default</span> <span class="token boolean">false</span><span class="token punctuation">;</span>
 
 <span class="token punctuation">}</span>
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><ul><li>@Transactional \u6CE8\u89E3\u4E2D\u7684 propagation \u5BF9\u5E94 TransactionDefinition \u4E2D\u7684 getPropagationBehavior\uFF0C\u9ED8\u8BA4\u503C\u4E3A <code>Propagation.REQUIRED(TransactionDefinition.PROPAGATION_REQUIRED)</code>\u3002</li><li>@Transactional \u6CE8\u89E3\u4E2D\u7684 isolation \u5BF9\u5E94 TransactionDefinition \u4E2D\u7684 getIsolationLevel\uFF0C\u9ED8\u8BA4\u503C\u4E3A <code>DEFAULT(TransactionDefinition.ISOLATION_DEFAULT)</code>\u3002</li><li>@Transactional \u6CE8\u89E3\u4E2D\u7684 timeout \u5BF9\u5E94 TransactionDefinition \u4E2D\u7684 getTimeout\uFF0C\u9ED8\u8BA4\u503C\u4E3ATransactionDefinition.TIMEOUT_DEFAULT\u3002</li><li>@Transactional \u6CE8\u89E3\u4E2D\u7684 readOnly \u5BF9\u5E94 TransactionDefinition \u4E2D\u7684 isReadOnly\uFF0C\u9ED8\u8BA4\u503C\u4E3A false\u3002</li></ul><p>\u8BF4\u5230\u8FD9\uFF0C\u6211\u4EEC\u6765\u8BE6\u7EC6\u5730\u8BF4\u660E\u4E00\u4E0B Spring \u4E8B\u52A1\u7684\u4F20\u64AD\u884C\u4E3A\u3001\u4E8B\u52A1\u7684\u9694\u79BB\u7EA7\u522B\u3001\u4E8B\u52A1\u7684\u8D85\u65F6\u65F6\u95F4\u3001\u4E8B\u52A1\u7684\u53EA\u8BFB\u5C5E\u6027\uFF0C\u4EE5\u53CA\u4E8B\u52A1\u7684\u56DE\u6EDA\u89C4\u5219\u3002</p><h4 id="\u4E8B\u52A1\u4F20\u64AD\u884C\u4E3A" tabindex="-1"><a class="header-anchor" href="#\u4E8B\u52A1\u4F20\u64AD\u884C\u4E3A" aria-hidden="true">#</a> \u4E8B\u52A1\u4F20\u64AD\u884C\u4E3A</h4><p><strong>\u5F53\u4E8B\u52A1\u65B9\u6CD5\u88AB\u53E6\u5916\u4E00\u4E2A\u4E8B\u52A1\u65B9\u6CD5\u8C03\u7528\u65F6\uFF0C\u5FC5\u987B\u6307\u5B9A\u4E8B\u52A1\u5E94\u8BE5\u5982\u4F55\u4F20\u64AD</strong>\uFF0C\u4F8B\u5982\uFF0C\u65B9\u6CD5\u53EF\u80FD\u7EE7\u7EED\u5728\u5F53\u524D\u4E8B\u52A1\u4E2D\u6267\u884C\uFF0C\u4E5F\u53EF\u4EE5\u5F00\u542F\u4E00\u4E2A\u65B0\u7684\u4E8B\u52A1\uFF0C\u5728\u81EA\u5DF1\u7684\u4E8B\u52A1\u4E2D\u6267\u884C\u3002</p><p>\u58F0\u660E\u5F0F\u4E8B\u52A1\u7684\u4F20\u64AD\u884C\u4E3A\u53EF\u4EE5\u901A\u8FC7 @Transactional \u6CE8\u89E3\u4E2D\u7684 propagation \u5C5E\u6027\u6765\u5B9A\u4E49\uFF0C\u6BD4\u5982\u8BF4\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token annotation punctuation">@Transactional</span><span class="token punctuation">(</span>propagation <span class="token operator">=</span> <span class="token class-name">Propagation</span><span class="token punctuation">.</span>REQUIRED<span class="token punctuation">)</span>
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><ul><li>@Transactional \u6CE8\u89E3\u4E2D\u7684 propagation \u5BF9\u5E94 TransactionDefinition \u4E2D\u7684 getPropagationBehavior\uFF0C\u9ED8\u8BA4\u503C\u4E3A <code>Propagation.REQUIRED(TransactionDefinition.PROPAGATION_REQUIRED)</code>\u3002</li><li>@Transactional \u6CE8\u89E3\u4E2D\u7684 isolation \u5BF9\u5E94 TransactionDefinition \u4E2D\u7684 getIsolationLevel\uFF0C\u9ED8\u8BA4\u503C\u4E3A <code>DEFAULT(TransactionDefinition.ISOLATION_DEFAULT)</code>\u3002</li><li>@Transactional \u6CE8\u89E3\u4E2D\u7684 timeout \u5BF9\u5E94 TransactionDefinition \u4E2D\u7684 getTimeout\uFF0C\u9ED8\u8BA4\u503C\u4E3ATransactionDefinition.TIMEOUT_DEFAULT\u3002</li><li>@Transactional \u6CE8\u89E3\u4E2D\u7684 readOnly \u5BF9\u5E94 TransactionDefinition \u4E2D\u7684 isReadOnly\uFF0C\u9ED8\u8BA4\u503C\u4E3A false\u3002</li></ul><p>\u8BF4\u5230\u8FD9\uFF0C\u6211\u4EEC\u6765\u8BE6\u7EC6\u5730\u8BF4\u660E\u4E00\u4E0B Spring \u4E8B\u52A1\u7684\u4F20\u64AD\u884C\u4E3A\u3001\u4E8B\u52A1\u7684\u9694\u79BB\u7EA7\u522B\u3001\u4E8B\u52A1\u7684\u8D85\u65F6\u65F6\u95F4\u3001\u4E8B\u52A1\u7684\u53EA\u8BFB\u5C5E\u6027\uFF0C\u4EE5\u53CA\u4E8B\u52A1\u7684\u56DE\u6EDA\u89C4\u5219\u3002</p><h3 id="\u4E8B\u52A1\u4F20\u64AD\u884C\u4E3A" tabindex="-1"><a class="header-anchor" href="#\u4E8B\u52A1\u4F20\u64AD\u884C\u4E3A" aria-hidden="true">#</a> \u4E8B\u52A1\u4F20\u64AD\u884C\u4E3A</h3><p><strong>\u5F53\u4E8B\u52A1\u65B9\u6CD5\u88AB\u53E6\u5916\u4E00\u4E2A\u4E8B\u52A1\u65B9\u6CD5\u8C03\u7528\u65F6\uFF0C\u5FC5\u987B\u6307\u5B9A\u4E8B\u52A1\u5E94\u8BE5\u5982\u4F55\u4F20\u64AD</strong>\uFF0C\u4F8B\u5982\uFF0C\u65B9\u6CD5\u53EF\u80FD\u7EE7\u7EED\u5728\u5F53\u524D\u4E8B\u52A1\u4E2D\u6267\u884C\uFF0C\u4E5F\u53EF\u4EE5\u5F00\u542F\u4E00\u4E2A\u65B0\u7684\u4E8B\u52A1\uFF0C\u5728\u81EA\u5DF1\u7684\u4E8B\u52A1\u4E2D\u6267\u884C\u3002</p><p>\u58F0\u660E\u5F0F\u4E8B\u52A1\u7684\u4F20\u64AD\u884C\u4E3A\u53EF\u4EE5\u901A\u8FC7 @Transactional \u6CE8\u89E3\u4E2D\u7684 propagation \u5C5E\u6027\u6765\u5B9A\u4E49\uFF0C\u6BD4\u5982\u8BF4\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token annotation punctuation">@Transactional</span><span class="token punctuation">(</span>propagation <span class="token operator">=</span> <span class="token class-name">Propagation</span><span class="token punctuation">.</span>REQUIRED<span class="token punctuation">)</span>
 <span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">savePosts</span><span class="token punctuation">(</span><span class="token class-name">PostsParam</span> postsParam<span class="token punctuation">)</span> <span class="token punctuation">{</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>TransactionDefinition \u4E00\u5171\u5B9A\u4E49\u4E86 7 \u79CD\u4E8B\u52A1\u4F20\u64AD\u884C\u4E3A\uFF1A</p><p>01\u3001<code>PROPAGATION_REQUIRED</code></p><p>\u8FD9\u4E5F\u662F @Transactional \u9ED8\u8BA4\u7684\u4E8B\u52A1\u4F20\u64AD\u884C\u4E3A\uFF0C\u6307\u7684\u662F\u5982\u679C\u5F53\u524D\u5B58\u5728\u4E8B\u52A1\uFF0C\u5219\u52A0\u5165\u8BE5\u4E8B\u52A1\uFF1B\u5982\u679C\u5F53\u524D\u6CA1\u6709\u4E8B\u52A1\uFF0C\u5219\u521B\u5EFA\u4E00\u4E2A\u65B0\u7684\u4E8B\u52A1\u3002\u66F4\u786E\u5207\u5730\u610F\u601D\u662F\uFF1A</p><ul><li>\u5982\u679C\u5916\u90E8\u65B9\u6CD5\u6CA1\u6709\u5F00\u542F\u4E8B\u52A1\u7684\u8BDD\uFF0CPropagation.REQUIRED \u4FEE\u9970\u7684\u5185\u90E8\u65B9\u6CD5\u4F1A\u5F00\u542F\u81EA\u5DF1\u7684\u4E8B\u52A1\uFF0C\u4E14\u5F00\u542F\u7684\u4E8B\u52A1\u76F8\u4E92\u72EC\u7ACB\uFF0C\u4E92\u4E0D\u5E72\u6270\u3002</li><li>\u5982\u679C\u5916\u90E8\u65B9\u6CD5\u5F00\u542F\u4E8B\u52A1\u5E76\u4E14\u662F Propagation.REQUIRED \u7684\u8BDD\uFF0C\u6240\u6709 Propagation.REQUIRED \u4FEE\u9970\u7684\u5185\u90E8\u65B9\u6CD5\u548C\u5916\u90E8\u65B9\u6CD5\u5747\u5C5E\u4E8E\u540C\u4E00\u4E8B\u52A1 \uFF0C\u53EA\u8981\u4E00\u4E2A\u65B9\u6CD5\u56DE\u6EDA\uFF0C\u6574\u4E2A\u4E8B\u52A1\u90FD\u9700\u8981\u56DE\u6EDA\u3002</li></ul><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">Class</span> <span class="token class-name">A</span> <span class="token punctuation">{</span>
@@ -124,8 +124,8 @@ import{_ as i}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o as c,
        <span class="token comment">//do something</span>
     <span class="token punctuation">}</span>
 <span class="token punctuation">}</span>
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>\u5982\u679C aMethod()\u53D1\u751F\u5F02\u5E38\u56DE\u6EDA\uFF0CbMethod()\u4E0D\u4F1A\u8DDF\u7740\u56DE\u6EDA\uFF0C\u56E0\u4E3A bMethod()\u5F00\u542F\u4E86\u72EC\u7ACB\u7684\u4E8B\u52A1\u3002\u4F46\u662F\uFF0C\u5982\u679C bMethod()\u629B\u51FA\u4E86\u672A\u88AB\u6355\u83B7\u7684\u5F02\u5E38\u5E76\u4E14\u8FD9\u4E2A\u5F02\u5E38\u6EE1\u8DB3\u4E8B\u52A1\u56DE\u6EDA\u89C4\u5219\u7684\u8BDD,aMethod()\u540C\u6837\u4E5F\u4F1A\u56DE\u6EDA\u3002</p><p>03\u3001<code>PROPAGATION_NESTED</code></p><p>\u5982\u679C\u5F53\u524D\u5B58\u5728\u4E8B\u52A1\uFF0C\u5C31\u5728\u5F53\u524D\u4E8B\u52A1\u5185\u6267\u884C\uFF1B\u5426\u5219\uFF0C\u5C31\u6267\u884C\u4E0E PROPAGATION_REQUIRED \u7C7B\u4F3C\u7684\u64CD\u4F5C\u3002</p><p>04\u3001<code>PROPAGATION_MANDATORY</code></p><p>\u5982\u679C\u5F53\u524D\u5B58\u5728\u4E8B\u52A1\uFF0C\u5219\u52A0\u5165\u8BE5\u4E8B\u52A1\uFF1B\u5982\u679C\u5F53\u524D\u6CA1\u6709\u4E8B\u52A1\uFF0C\u5219\u629B\u51FA\u5F02\u5E38\u3002</p><p>05\u3001<code>PROPAGATION_SUPPORTS</code></p><p>\u5982\u679C\u5F53\u524D\u5B58\u5728\u4E8B\u52A1\uFF0C\u5219\u52A0\u5165\u8BE5\u4E8B\u52A1\uFF1B\u5982\u679C\u5F53\u524D\u6CA1\u6709\u4E8B\u52A1\uFF0C\u5219\u4EE5\u975E\u4E8B\u52A1\u7684\u65B9\u5F0F\u7EE7\u7EED\u8FD0\u884C\u3002</p><p>06\u3001<code>PROPAGATION_NOT_SUPPORTED</code></p><p>\u4EE5\u975E\u4E8B\u52A1\u65B9\u5F0F\u8FD0\u884C\uFF0C\u5982\u679C\u5F53\u524D\u5B58\u5728\u4E8B\u52A1\uFF0C\u5219\u628A\u5F53\u524D\u4E8B\u52A1\u6302\u8D77\u3002</p><p>07\u3001<code>PROPAGATION_NEVER</code></p><p>\u4EE5\u975E\u4E8B\u52A1\u65B9\u5F0F\u8FD0\u884C\uFF0C\u5982\u679C\u5F53\u524D\u5B58\u5728\u4E8B\u52A1\uFF0C\u5219\u629B\u51FA\u5F02\u5E38\u3002</p><p>3\u30014\u30015\u30016\u30017 \u8FD9 5 \u79CD\u4E8B\u52A1\u4F20\u64AD\u65B9\u5F0F\u4E0D\u5E38\u7528\uFF0C\u4E86\u89E3\u5373\u53EF\u3002</p><h4 id="\u4E8B\u52A1\u9694\u79BB\u7EA7\u522B" tabindex="-1"><a class="header-anchor" href="#\u4E8B\u52A1\u9694\u79BB\u7EA7\u522B" aria-hidden="true">#</a> \u4E8B\u52A1\u9694\u79BB\u7EA7\u522B</h4><p>\u524D\u9762\u6211\u4EEC\u5DF2\u7ECF\u4E86\u89E3\u4E86\u6570\u636E\u5E93\u7684\u4E8B\u52A1\u9694\u79BB\u7EA7\u522B\uFF0C\u518D\u6765\u7406\u89E3 Spring \u7684\u4E8B\u52A1\u9694\u79BB\u7EA7\u522B\u5C31\u5BB9\u6613\u591A\u4E86\u3002</p><p>TransactionDefinition \u4E2D\u4E00\u5171\u5B9A\u4E49\u4E86 5 \u79CD\u4E8B\u52A1\u9694\u79BB\u7EA7\u522B\uFF1A</p><ul><li>ISOLATION_DEFAULT\uFF0C\u4F7F\u7528\u6570\u636E\u5E93\u9ED8\u8BA4\u7684\u9694\u79BB\u7EA7\u522B\uFF0CMySql \u9ED8\u8BA4\u91C7\u7528\u7684\u662F REPEATABLE_READ\uFF0C\u4E5F\u5C31\u662F\u53EF\u91CD\u590D\u8BFB\u3002</li><li>ISOLATION_READ_UNCOMMITTED\uFF0C\u6700\u4F4E\u7684\u9694\u79BB\u7EA7\u522B\uFF0C\u53EF\u80FD\u4F1A\u51FA\u73B0\u810F\u8BFB\u3001\u5E7B\u8BFB\u6216\u8005\u4E0D\u53EF\u91CD\u590D\u8BFB\u3002</li><li>ISOLATION_READ_COMMITTED\uFF0C\u5141\u8BB8\u8BFB\u53D6\u5E76\u53D1\u4E8B\u52A1\u63D0\u4EA4\u7684\u6570\u636E\uFF0C\u53EF\u4EE5\u9632\u6B62\u810F\u8BFB\uFF0C\u4F46\u5E7B\u8BFB\u548C\u4E0D\u53EF\u91CD\u590D\u8BFB\u4ECD\u7136\u6709\u53EF\u80FD\u53D1\u751F\u3002</li><li>ISOLATION_REPEATABLE_READ\uFF0C\u5BF9\u540C\u4E00\u5B57\u6BB5\u7684\u591A\u6B21\u8BFB\u53D6\u7ED3\u679C\u90FD\u662F\u4E00\u81F4\u7684\uFF0C\u9664\u975E\u6570\u636E\u662F\u88AB\u81EA\u8EAB\u4E8B\u52A1\u6240\u4FEE\u6539\u7684\uFF0C\u53EF\u4EE5\u963B\u6B62\u810F\u8BFB\u548C\u4E0D\u53EF\u91CD\u590D\u8BFB\uFF0C\u4F46\u5E7B\u8BFB\u4ECD\u6709\u53EF\u80FD\u53D1\u751F\u3002</li><li>ISOLATION_SERIALIZABLE\uFF0C\u6700\u9AD8\u7684\u9694\u79BB\u7EA7\u522B\uFF0C\u867D\u7136\u53EF\u4EE5\u963B\u6B62\u810F\u8BFB\u3001\u5E7B\u8BFB\u548C\u4E0D\u53EF\u91CD\u590D\u8BFB\uFF0C\u4F46\u4F1A\u4E25\u91CD\u5F71\u54CD\u7A0B\u5E8F\u6027\u80FD\u3002</li></ul><p>\u901A\u5E38\u60C5\u51B5\u4E0B\uFF0C\u6211\u4EEC\u91C7\u7528\u9ED8\u8BA4\u7684\u9694\u79BB\u7EA7\u522B ISOLATION_DEFAULT \u5C31\u53EF\u4EE5\u4E86\uFF0C\u4E5F\u5C31\u662F\u4EA4\u7ED9\u6570\u636E\u5E93\u6765\u51B3\u5B9A\uFF0C\u53EF\u4EE5\u901A\u8FC7 <code>SELECT @@transaction_isolation;</code> \u547D\u4EE4\u6765\u67E5\u770B MySql \u7684\u9ED8\u8BA4\u9694\u79BB\u7EA7\u522B\uFF0C\u7ED3\u679C\u4E3A REPEATABLE-READ\uFF0C\u4E5F\u5C31\u662F\u53EF\u91CD\u590D\u8BFB\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/transaction-06cb7de0-6316-4ba6-b642-9584bc998468.png" alt=""></p><h4 id="\u4E8B\u52A1\u7684\u8D85\u65F6\u65F6\u95F4" tabindex="-1"><a class="header-anchor" href="#\u4E8B\u52A1\u7684\u8D85\u65F6\u65F6\u95F4" aria-hidden="true">#</a> \u4E8B\u52A1\u7684\u8D85\u65F6\u65F6\u95F4</h4><p>\u4E8B\u52A1\u8D85\u65F6\uFF0C\u4E5F\u5C31\u662F\u6307\u4E00\u4E2A\u4E8B\u52A1\u6240\u5141\u8BB8\u6267\u884C\u7684\u6700\u957F\u65F6\u95F4\uFF0C\u5982\u679C\u5728\u8D85\u65F6\u65F6\u95F4\u5185\u8FD8\u6CA1\u6709\u5B8C\u6210\u7684\u8BDD\uFF0C\u5C31\u81EA\u52A8\u56DE\u6EDA\u3002</p><p>\u5047\u5982\u4E8B\u52A1\u7684\u6267\u884C\u65F6\u95F4\u683C\u5916\u7684\u957F\uFF0C\u7531\u4E8E\u4E8B\u52A1\u6D89\u53CA\u5230\u5BF9\u6570\u636E\u5E93\u7684\u9501\u5B9A\uFF0C\u5C31\u4F1A\u5BFC\u81F4\u957F\u65F6\u95F4\u8FD0\u884C\u7684\u4E8B\u52A1\u5360\u7528\u6570\u636E\u5E93\u8D44\u6E90\u3002</p><h4 id="\u4E8B\u52A1\u7684\u53EA\u8BFB\u5C5E\u6027" tabindex="-1"><a class="header-anchor" href="#\u4E8B\u52A1\u7684\u53EA\u8BFB\u5C5E\u6027" aria-hidden="true">#</a> \u4E8B\u52A1\u7684\u53EA\u8BFB\u5C5E\u6027</h4><p>\u5982\u679C\u4E00\u4E2A\u4E8B\u52A1\u53EA\u662F\u5BF9\u6570\u636E\u5E93\u6267\u884C\u8BFB\u64CD\u4F5C\uFF0C\u90A3\u4E48\u8BE5\u6570\u636E\u5E93\u5C31\u53EF\u4EE5\u5229\u7528\u4E8B\u52A1\u7684\u53EA\u8BFB\u5C5E\u6027\uFF0C\u91C7\u53D6\u4F18\u5316\u63AA\u65BD\uFF0C\u9002\u7528\u4E8E\u591A\u6761\u6570\u636E\u5E93\u67E5\u8BE2\u64CD\u4F5C\u4E2D\u3002</p><blockquote><p>\u4E3A\u4EC0\u4E48\u4E00\u4E2A\u67E5\u8BE2\u64CD\u4F5C\u8FD8\u8981\u542F\u7528\u4E8B\u52A1\u652F\u6301\u5462\uFF1F</p></blockquote><p>\u8FD9\u662F\u56E0\u4E3A MySql\uFF08innodb\uFF09\u9ED8\u8BA4\u5BF9\u6BCF\u4E00\u4E2A\u8FDE\u63A5\u90FD\u542F\u7528\u4E86 autocommit \u6A21\u5F0F\uFF0C\u5728\u8BE5\u6A21\u5F0F\u4E0B\uFF0C\u6BCF\u4E00\u4E2A\u53D1\u9001\u5230 MySql \u670D\u52A1\u5668\u7684 SQL \u8BED\u53E5\u90FD\u4F1A\u5728\u4E00\u4E2A\u5355\u72EC\u7684\u4E8B\u52A1\u4E2D\u8FDB\u884C\u5904\u7406\uFF0C\u6267\u884C\u7ED3\u675F\u540E\u4F1A\u81EA\u52A8\u63D0\u4EA4\u4E8B\u52A1\u3002</p><p>\u90A3\u5982\u679C\u6211\u4EEC\u7ED9\u65B9\u6CD5\u52A0\u4E0A\u4E86 @Transactional \u6CE8\u89E3\uFF0C\u90A3\u8FD9\u4E2A\u65B9\u6CD5\u4E2D\u6240\u6709\u7684 SQL \u90FD\u4F1A\u653E\u5728\u4E00\u4E2A\u4E8B\u52A1\u91CC\u3002\u5426\u5219\uFF0C\u6BCF\u6761 SQL \u90FD\u4F1A\u5355\u72EC\u5F00\u542F\u4E00\u4E2A\u4E8B\u52A1\uFF0C\u4E2D\u95F4\u88AB\u5176\u4ED6\u4E8B\u52A1\u4FEE\u6539\u4E86\u6570\u636E\uFF0C\u90FD\u4F1A\u5B9E\u65F6\u8BFB\u53D6\u5230\u3002</p><p>\u6709\u4E9B\u60C5\u51B5\u4E0B\uFF0C\u5F53\u4E00\u6B21\u6267\u884C\u591A\u6761\u67E5\u8BE2\u8BED\u53E5\u65F6\uFF0C\u9700\u8981\u4FDD\u8BC1\u6570\u636E\u4E00\u81F4\u6027\u65F6\uFF0C\u5C31\u9700\u8981\u542F\u7528\u4E8B\u52A1\u652F\u6301\u3002\u5426\u5219\u4E0A\u4E00\u6761 SQL \u67E5\u8BE2\u540E\uFF0C\u88AB\u5176\u4ED6\u7528\u6237\u6539\u53D8\u4E86\u6570\u636E\uFF0C\u90A3\u4E48\u4E0B\u4E00\u4E2A SQL \u67E5\u8BE2\u53EF\u80FD\u5C31\u4F1A\u51FA\u73B0\u4E0D\u4E00\u81F4\u7684\u72B6\u6001\u3002</p><h4 id="\u4E8B\u52A1\u7684\u56DE\u6EDA\u7B56\u7565" tabindex="-1"><a class="header-anchor" href="#\u4E8B\u52A1\u7684\u56DE\u6EDA\u7B56\u7565" aria-hidden="true">#</a> \u4E8B\u52A1\u7684\u56DE\u6EDA\u7B56\u7565</h4><p>\u9ED8\u8BA4\u60C5\u51B5\u4E0B\uFF0C\u4E8B\u52A1\u53EA\u5728\u51FA\u73B0\u8FD0\u884C\u65F6\u5F02\u5E38\uFF08Runtime Exception\uFF09\u65F6\u56DE\u6EDA\uFF0C\u4EE5\u53CA Error\uFF0C\u51FA\u73B0\u68C0\u67E5\u5F02\u5E38\uFF08checked exception\uFF0C\u9700\u8981\u4E3B\u52A8\u6355\u83B7\u5904\u7406\u6216\u8005\u5411\u4E0A\u629B\u51FA\uFF09\u65F6\u4E0D\u56DE\u6EDA\u3002</p>`,57),g={href:"https://tobebetterjavaer.com/exception/gailan.html#%E4%B8%89%E3%80%81checked%E5%92%8Cunchecked%E5%BC%82%E5%B8%B8",target:"_blank",rel:"noopener noreferrer"},T=a("checked\u548Cunchecked\u5F02\u5E38"),f=e(`<p>\u5982\u679C\u4F60\u60F3\u8981\u56DE\u6EDA\u7279\u5B9A\u7684\u5F02\u5E38\u7C7B\u578B\u7684\u8BDD\uFF0C\u53EF\u4EE5\u8FD9\u6837\u8BBE\u7F6E\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token annotation punctuation">@Transactional</span><span class="token punctuation">(</span>rollbackFor<span class="token operator">=</span> <span class="token class-name">MyException</span><span class="token punctuation">.</span><span class="token keyword">class</span><span class="token punctuation">)</span>
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h3 id="\u5173\u4E8E-spring-boot-\u5BF9\u4E8B\u52A1\u7684\u652F\u6301" tabindex="-1"><a class="header-anchor" href="#\u5173\u4E8E-spring-boot-\u5BF9\u4E8B\u52A1\u7684\u652F\u6301" aria-hidden="true">#</a> \u5173\u4E8E Spring Boot \u5BF9\u4E8B\u52A1\u7684\u652F\u6301</h3><p>\u4EE5\u524D\uFF0C\u6211\u4EEC\u9700\u8981\u901A\u8FC7 XML \u914D\u7F6E Spring \u6765\u6258\u7BA1\u4E8B\u52A1\uFF0C\u6709\u4E86 Spring Boot \u4E4B\u540E\uFF0C\u4E00\u5207\u5C31\u53D8\u5F97\u66F4\u52A0\u7B80\u5355\u4E86\uFF0C\u53EA\u9700\u8981\u5728\u4E1A\u52A1\u5C42\u6DFB\u52A0\u4E8B\u52A1\u6CE8\u89E3\uFF08<code>@Transactional</code>\uFF09\u5C31\u53EF\u4EE5\u5FEB\u901F\u5F00\u542F\u4E8B\u52A1\u3002</p><p>\u4E5F\u5C31\u662F\u8BF4\uFF0C\u6211\u4EEC\u53EA\u9700\u8981\u628A\u7126\u70B9\u653E\u5728 <code>@Transactional</code> \u6CE8\u89E3\u4E0A\u5C31\u53EF\u4EE5\u4E86\u3002</p><h4 id="transactional-\u7684\u4F5C\u7528\u8303\u56F4" tabindex="-1"><a class="header-anchor" href="#transactional-\u7684\u4F5C\u7528\u8303\u56F4" aria-hidden="true">#</a> @Transactional \u7684\u4F5C\u7528\u8303\u56F4</h4><ul><li>\u7C7B\u4E0A\uFF0C\u8868\u660E\u7C7B\u4E2D\u6240\u6709 public \u65B9\u6CD5\u90FD\u542F\u7528\u4E8B\u52A1</li><li>\u65B9\u6CD5\u4E0A\uFF0C\u6700\u5E38\u7528\u7684\u4E00\u79CD</li><li>\u63A5\u53E3\u4E0A\uFF0C\u4E0D\u63A8\u8350\u4F7F\u7528</li></ul><h4 id="transactional-\u7684\u5E38\u7528\u914D\u7F6E\u53C2\u6570" tabindex="-1"><a class="header-anchor" href="#transactional-\u7684\u5E38\u7528\u914D\u7F6E\u53C2\u6570" aria-hidden="true">#</a> @Transactional \u7684\u5E38\u7528\u914D\u7F6E\u53C2\u6570</h4><p>\u867D\u7136 @Transactional \u6CE8\u89E3\u6E90\u7801\u4E2D\u5B9A\u4E49\u4E86\u5F88\u591A\u5C5E\u6027\uFF0C\u4F46\u5927\u591A\u6570\u65F6\u5019\uFF0C\u6211\u90FD\u662F\u91C7\u7528\u9ED8\u8BA4\u914D\u7F6E\uFF0C\u5F53\u7136\u4E86\uFF0C\u5982\u679C\u9700\u8981\u81EA\u5B9A\u4E49\u7684\u8BDD\uFF0C\u524D\u9762\u4E5F\u90FD\u8BF4\u660E\u8FC7\u4E86\u3002</p><h4 id="transactional-\u7684\u4F7F\u7528\u6CE8\u610F\u4E8B\u9879\u603B\u7ED3" tabindex="-1"><a class="header-anchor" href="#transactional-\u7684\u4F7F\u7528\u6CE8\u610F\u4E8B\u9879\u603B\u7ED3" aria-hidden="true">#</a> @Transactional \u7684\u4F7F\u7528\u6CE8\u610F\u4E8B\u9879\u603B\u7ED3</h4><p>1\uFF09\u8981\u5728 public \u65B9\u6CD5\u4E0A\u4F7F\u7528\uFF0C\u5728AbstractFallbackTransactionAttributeSource\u7C7B\u7684computeTransactionAttribute\u65B9\u6CD5\u4E2D\u6709\u4E2A\u5224\u65AD\uFF0C\u5982\u679C\u76EE\u6807\u65B9\u6CD5\u4E0D\u662Fpublic\uFF0C\u5219TransactionAttribute\u8FD4\u56DEnull\uFF0C\u5373\u4E0D\u652F\u6301\u4E8B\u52A1\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">protected</span> <span class="token class-name">TransactionAttribute</span> <span class="token function">computeTransactionAttribute</span><span class="token punctuation">(</span><span class="token class-name">Method</span> method<span class="token punctuation">,</span> <span class="token annotation punctuation">@Nullable</span> <span class="token class-name">Class</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token operator">?</span><span class="token punctuation">&gt;</span></span> targetClass<span class="token punctuation">)</span> <span class="token punctuation">{</span>
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>\u5982\u679C aMethod()\u53D1\u751F\u5F02\u5E38\u56DE\u6EDA\uFF0CbMethod()\u4E0D\u4F1A\u8DDF\u7740\u56DE\u6EDA\uFF0C\u56E0\u4E3A bMethod()\u5F00\u542F\u4E86\u72EC\u7ACB\u7684\u4E8B\u52A1\u3002\u4F46\u662F\uFF0C\u5982\u679C bMethod()\u629B\u51FA\u4E86\u672A\u88AB\u6355\u83B7\u7684\u5F02\u5E38\u5E76\u4E14\u8FD9\u4E2A\u5F02\u5E38\u6EE1\u8DB3\u4E8B\u52A1\u56DE\u6EDA\u89C4\u5219\u7684\u8BDD,aMethod()\u540C\u6837\u4E5F\u4F1A\u56DE\u6EDA\u3002</p><p>03\u3001<code>PROPAGATION_NESTED</code></p><p>\u5982\u679C\u5F53\u524D\u5B58\u5728\u4E8B\u52A1\uFF0C\u5C31\u5728\u5F53\u524D\u4E8B\u52A1\u5185\u6267\u884C\uFF1B\u5426\u5219\uFF0C\u5C31\u6267\u884C\u4E0E PROPAGATION_REQUIRED \u7C7B\u4F3C\u7684\u64CD\u4F5C\u3002</p><p>04\u3001<code>PROPAGATION_MANDATORY</code></p><p>\u5982\u679C\u5F53\u524D\u5B58\u5728\u4E8B\u52A1\uFF0C\u5219\u52A0\u5165\u8BE5\u4E8B\u52A1\uFF1B\u5982\u679C\u5F53\u524D\u6CA1\u6709\u4E8B\u52A1\uFF0C\u5219\u629B\u51FA\u5F02\u5E38\u3002</p><p>05\u3001<code>PROPAGATION_SUPPORTS</code></p><p>\u5982\u679C\u5F53\u524D\u5B58\u5728\u4E8B\u52A1\uFF0C\u5219\u52A0\u5165\u8BE5\u4E8B\u52A1\uFF1B\u5982\u679C\u5F53\u524D\u6CA1\u6709\u4E8B\u52A1\uFF0C\u5219\u4EE5\u975E\u4E8B\u52A1\u7684\u65B9\u5F0F\u7EE7\u7EED\u8FD0\u884C\u3002</p><p>06\u3001<code>PROPAGATION_NOT_SUPPORTED</code></p><p>\u4EE5\u975E\u4E8B\u52A1\u65B9\u5F0F\u8FD0\u884C\uFF0C\u5982\u679C\u5F53\u524D\u5B58\u5728\u4E8B\u52A1\uFF0C\u5219\u628A\u5F53\u524D\u4E8B\u52A1\u6302\u8D77\u3002</p><p>07\u3001<code>PROPAGATION_NEVER</code></p><p>\u4EE5\u975E\u4E8B\u52A1\u65B9\u5F0F\u8FD0\u884C\uFF0C\u5982\u679C\u5F53\u524D\u5B58\u5728\u4E8B\u52A1\uFF0C\u5219\u629B\u51FA\u5F02\u5E38\u3002</p><p>3\u30014\u30015\u30016\u30017 \u8FD9 5 \u79CD\u4E8B\u52A1\u4F20\u64AD\u65B9\u5F0F\u4E0D\u5E38\u7528\uFF0C\u4E86\u89E3\u5373\u53EF\u3002</p><h3 id="\u4E8B\u52A1\u9694\u79BB\u7EA7\u522B" tabindex="-1"><a class="header-anchor" href="#\u4E8B\u52A1\u9694\u79BB\u7EA7\u522B" aria-hidden="true">#</a> \u4E8B\u52A1\u9694\u79BB\u7EA7\u522B</h3><p>\u524D\u9762\u6211\u4EEC\u5DF2\u7ECF\u4E86\u89E3\u4E86\u6570\u636E\u5E93\u7684\u4E8B\u52A1\u9694\u79BB\u7EA7\u522B\uFF0C\u518D\u6765\u7406\u89E3 Spring \u7684\u4E8B\u52A1\u9694\u79BB\u7EA7\u522B\u5C31\u5BB9\u6613\u591A\u4E86\u3002</p><p>TransactionDefinition \u4E2D\u4E00\u5171\u5B9A\u4E49\u4E86 5 \u79CD\u4E8B\u52A1\u9694\u79BB\u7EA7\u522B\uFF1A</p><ul><li>ISOLATION_DEFAULT\uFF0C\u4F7F\u7528\u6570\u636E\u5E93\u9ED8\u8BA4\u7684\u9694\u79BB\u7EA7\u522B\uFF0CMySql \u9ED8\u8BA4\u91C7\u7528\u7684\u662F REPEATABLE_READ\uFF0C\u4E5F\u5C31\u662F\u53EF\u91CD\u590D\u8BFB\u3002</li><li>ISOLATION_READ_UNCOMMITTED\uFF0C\u6700\u4F4E\u7684\u9694\u79BB\u7EA7\u522B\uFF0C\u53EF\u80FD\u4F1A\u51FA\u73B0\u810F\u8BFB\u3001\u5E7B\u8BFB\u6216\u8005\u4E0D\u53EF\u91CD\u590D\u8BFB\u3002</li><li>ISOLATION_READ_COMMITTED\uFF0C\u5141\u8BB8\u8BFB\u53D6\u5E76\u53D1\u4E8B\u52A1\u63D0\u4EA4\u7684\u6570\u636E\uFF0C\u53EF\u4EE5\u9632\u6B62\u810F\u8BFB\uFF0C\u4F46\u5E7B\u8BFB\u548C\u4E0D\u53EF\u91CD\u590D\u8BFB\u4ECD\u7136\u6709\u53EF\u80FD\u53D1\u751F\u3002</li><li>ISOLATION_REPEATABLE_READ\uFF0C\u5BF9\u540C\u4E00\u5B57\u6BB5\u7684\u591A\u6B21\u8BFB\u53D6\u7ED3\u679C\u90FD\u662F\u4E00\u81F4\u7684\uFF0C\u9664\u975E\u6570\u636E\u662F\u88AB\u81EA\u8EAB\u4E8B\u52A1\u6240\u4FEE\u6539\u7684\uFF0C\u53EF\u4EE5\u963B\u6B62\u810F\u8BFB\u548C\u4E0D\u53EF\u91CD\u590D\u8BFB\uFF0C\u4F46\u5E7B\u8BFB\u4ECD\u6709\u53EF\u80FD\u53D1\u751F\u3002</li><li>ISOLATION_SERIALIZABLE\uFF0C\u6700\u9AD8\u7684\u9694\u79BB\u7EA7\u522B\uFF0C\u867D\u7136\u53EF\u4EE5\u963B\u6B62\u810F\u8BFB\u3001\u5E7B\u8BFB\u548C\u4E0D\u53EF\u91CD\u590D\u8BFB\uFF0C\u4F46\u4F1A\u4E25\u91CD\u5F71\u54CD\u7A0B\u5E8F\u6027\u80FD\u3002</li></ul><p>\u901A\u5E38\u60C5\u51B5\u4E0B\uFF0C\u6211\u4EEC\u91C7\u7528\u9ED8\u8BA4\u7684\u9694\u79BB\u7EA7\u522B ISOLATION_DEFAULT \u5C31\u53EF\u4EE5\u4E86\uFF0C\u4E5F\u5C31\u662F\u4EA4\u7ED9\u6570\u636E\u5E93\u6765\u51B3\u5B9A\uFF0C\u53EF\u4EE5\u901A\u8FC7 <code>SELECT @@transaction_isolation;</code> \u547D\u4EE4\u6765\u67E5\u770B MySql \u7684\u9ED8\u8BA4\u9694\u79BB\u7EA7\u522B\uFF0C\u7ED3\u679C\u4E3A REPEATABLE-READ\uFF0C\u4E5F\u5C31\u662F\u53EF\u91CD\u590D\u8BFB\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/transaction-06cb7de0-6316-4ba6-b642-9584bc998468.png" alt=""></p><h3 id="\u4E8B\u52A1\u7684\u8D85\u65F6\u65F6\u95F4" tabindex="-1"><a class="header-anchor" href="#\u4E8B\u52A1\u7684\u8D85\u65F6\u65F6\u95F4" aria-hidden="true">#</a> \u4E8B\u52A1\u7684\u8D85\u65F6\u65F6\u95F4</h3><p>\u4E8B\u52A1\u8D85\u65F6\uFF0C\u4E5F\u5C31\u662F\u6307\u4E00\u4E2A\u4E8B\u52A1\u6240\u5141\u8BB8\u6267\u884C\u7684\u6700\u957F\u65F6\u95F4\uFF0C\u5982\u679C\u5728\u8D85\u65F6\u65F6\u95F4\u5185\u8FD8\u6CA1\u6709\u5B8C\u6210\u7684\u8BDD\uFF0C\u5C31\u81EA\u52A8\u56DE\u6EDA\u3002</p><p>\u5047\u5982\u4E8B\u52A1\u7684\u6267\u884C\u65F6\u95F4\u683C\u5916\u7684\u957F\uFF0C\u7531\u4E8E\u4E8B\u52A1\u6D89\u53CA\u5230\u5BF9\u6570\u636E\u5E93\u7684\u9501\u5B9A\uFF0C\u5C31\u4F1A\u5BFC\u81F4\u957F\u65F6\u95F4\u8FD0\u884C\u7684\u4E8B\u52A1\u5360\u7528\u6570\u636E\u5E93\u8D44\u6E90\u3002</p><h3 id="\u4E8B\u52A1\u7684\u53EA\u8BFB\u5C5E\u6027" tabindex="-1"><a class="header-anchor" href="#\u4E8B\u52A1\u7684\u53EA\u8BFB\u5C5E\u6027" aria-hidden="true">#</a> \u4E8B\u52A1\u7684\u53EA\u8BFB\u5C5E\u6027</h3><p>\u5982\u679C\u4E00\u4E2A\u4E8B\u52A1\u53EA\u662F\u5BF9\u6570\u636E\u5E93\u6267\u884C\u8BFB\u64CD\u4F5C\uFF0C\u90A3\u4E48\u8BE5\u6570\u636E\u5E93\u5C31\u53EF\u4EE5\u5229\u7528\u4E8B\u52A1\u7684\u53EA\u8BFB\u5C5E\u6027\uFF0C\u91C7\u53D6\u4F18\u5316\u63AA\u65BD\uFF0C\u9002\u7528\u4E8E\u591A\u6761\u6570\u636E\u5E93\u67E5\u8BE2\u64CD\u4F5C\u4E2D\u3002</p><blockquote><p>\u4E3A\u4EC0\u4E48\u4E00\u4E2A\u67E5\u8BE2\u64CD\u4F5C\u8FD8\u8981\u542F\u7528\u4E8B\u52A1\u652F\u6301\u5462\uFF1F</p></blockquote><p>\u8FD9\u662F\u56E0\u4E3A MySql\uFF08innodb\uFF09\u9ED8\u8BA4\u5BF9\u6BCF\u4E00\u4E2A\u8FDE\u63A5\u90FD\u542F\u7528\u4E86 autocommit \u6A21\u5F0F\uFF0C\u5728\u8BE5\u6A21\u5F0F\u4E0B\uFF0C\u6BCF\u4E00\u4E2A\u53D1\u9001\u5230 MySql \u670D\u52A1\u5668\u7684 SQL \u8BED\u53E5\u90FD\u4F1A\u5728\u4E00\u4E2A\u5355\u72EC\u7684\u4E8B\u52A1\u4E2D\u8FDB\u884C\u5904\u7406\uFF0C\u6267\u884C\u7ED3\u675F\u540E\u4F1A\u81EA\u52A8\u63D0\u4EA4\u4E8B\u52A1\u3002</p><p>\u90A3\u5982\u679C\u6211\u4EEC\u7ED9\u65B9\u6CD5\u52A0\u4E0A\u4E86 @Transactional \u6CE8\u89E3\uFF0C\u90A3\u8FD9\u4E2A\u65B9\u6CD5\u4E2D\u6240\u6709\u7684 SQL \u90FD\u4F1A\u653E\u5728\u4E00\u4E2A\u4E8B\u52A1\u91CC\u3002\u5426\u5219\uFF0C\u6BCF\u6761 SQL \u90FD\u4F1A\u5355\u72EC\u5F00\u542F\u4E00\u4E2A\u4E8B\u52A1\uFF0C\u4E2D\u95F4\u88AB\u5176\u4ED6\u4E8B\u52A1\u4FEE\u6539\u4E86\u6570\u636E\uFF0C\u90FD\u4F1A\u5B9E\u65F6\u8BFB\u53D6\u5230\u3002</p><p>\u6709\u4E9B\u60C5\u51B5\u4E0B\uFF0C\u5F53\u4E00\u6B21\u6267\u884C\u591A\u6761\u67E5\u8BE2\u8BED\u53E5\u65F6\uFF0C\u9700\u8981\u4FDD\u8BC1\u6570\u636E\u4E00\u81F4\u6027\u65F6\uFF0C\u5C31\u9700\u8981\u542F\u7528\u4E8B\u52A1\u652F\u6301\u3002\u5426\u5219\u4E0A\u4E00\u6761 SQL \u67E5\u8BE2\u540E\uFF0C\u88AB\u5176\u4ED6\u7528\u6237\u6539\u53D8\u4E86\u6570\u636E\uFF0C\u90A3\u4E48\u4E0B\u4E00\u4E2A SQL \u67E5\u8BE2\u53EF\u80FD\u5C31\u4F1A\u51FA\u73B0\u4E0D\u4E00\u81F4\u7684\u72B6\u6001\u3002</p><h3 id="\u4E8B\u52A1\u7684\u56DE\u6EDA\u7B56\u7565" tabindex="-1"><a class="header-anchor" href="#\u4E8B\u52A1\u7684\u56DE\u6EDA\u7B56\u7565" aria-hidden="true">#</a> \u4E8B\u52A1\u7684\u56DE\u6EDA\u7B56\u7565</h3><p>\u9ED8\u8BA4\u60C5\u51B5\u4E0B\uFF0C\u4E8B\u52A1\u53EA\u5728\u51FA\u73B0\u8FD0\u884C\u65F6\u5F02\u5E38\uFF08Runtime Exception\uFF09\u65F6\u56DE\u6EDA\uFF0C\u4EE5\u53CA Error\uFF0C\u51FA\u73B0\u68C0\u67E5\u5F02\u5E38\uFF08checked exception\uFF0C\u9700\u8981\u4E3B\u52A8\u6355\u83B7\u5904\u7406\u6216\u8005\u5411\u4E0A\u629B\u51FA\uFF09\u65F6\u4E0D\u56DE\u6EDA\u3002</p>`,57),b={href:"https://tobebetterjavaer.com/exception/gailan.html#%E4%B8%89%E3%80%81checked%E5%92%8Cunchecked%E5%BC%82%E5%B8%B8",target:"_blank",rel:"noopener noreferrer"},h=a("checked\u548Cunchecked\u5F02\u5E38"),g=e(`<p>\u5982\u679C\u4F60\u60F3\u8981\u56DE\u6EDA\u7279\u5B9A\u7684\u5F02\u5E38\u7C7B\u578B\u7684\u8BDD\uFF0C\u53EF\u4EE5\u8FD9\u6837\u8BBE\u7F6E\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token annotation punctuation">@Transactional</span><span class="token punctuation">(</span>rollbackFor<span class="token operator">=</span> <span class="token class-name">MyException</span><span class="token punctuation">.</span><span class="token keyword">class</span><span class="token punctuation">)</span>
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h2 id="\u5173\u4E8E-spring-boot-\u5BF9\u4E8B\u52A1\u7684\u652F\u6301" tabindex="-1"><a class="header-anchor" href="#\u5173\u4E8E-spring-boot-\u5BF9\u4E8B\u52A1\u7684\u652F\u6301" aria-hidden="true">#</a> \u5173\u4E8E Spring Boot \u5BF9\u4E8B\u52A1\u7684\u652F\u6301</h2><p>\u4EE5\u524D\uFF0C\u6211\u4EEC\u9700\u8981\u901A\u8FC7 XML \u914D\u7F6E Spring \u6765\u6258\u7BA1\u4E8B\u52A1\uFF0C\u6709\u4E86 Spring Boot \u4E4B\u540E\uFF0C\u4E00\u5207\u5C31\u53D8\u5F97\u66F4\u52A0\u7B80\u5355\u4E86\uFF0C\u53EA\u9700\u8981\u5728\u4E1A\u52A1\u5C42\u6DFB\u52A0\u4E8B\u52A1\u6CE8\u89E3\uFF08<code>@Transactional</code>\uFF09\u5C31\u53EF\u4EE5\u5FEB\u901F\u5F00\u542F\u4E8B\u52A1\u3002</p><p>\u4E5F\u5C31\u662F\u8BF4\uFF0C\u6211\u4EEC\u53EA\u9700\u8981\u628A\u7126\u70B9\u653E\u5728 <code>@Transactional</code> \u6CE8\u89E3\u4E0A\u5C31\u53EF\u4EE5\u4E86\u3002</p><h3 id="transactional-\u7684\u4F5C\u7528\u8303\u56F4" tabindex="-1"><a class="header-anchor" href="#transactional-\u7684\u4F5C\u7528\u8303\u56F4" aria-hidden="true">#</a> @Transactional \u7684\u4F5C\u7528\u8303\u56F4</h3><ul><li>\u7C7B\u4E0A\uFF0C\u8868\u660E\u7C7B\u4E2D\u6240\u6709 public \u65B9\u6CD5\u90FD\u542F\u7528\u4E8B\u52A1</li><li>\u65B9\u6CD5\u4E0A\uFF0C\u6700\u5E38\u7528\u7684\u4E00\u79CD</li><li>\u63A5\u53E3\u4E0A\uFF0C\u4E0D\u63A8\u8350\u4F7F\u7528</li></ul><h3 id="transactional-\u7684\u5E38\u7528\u914D\u7F6E\u53C2\u6570" tabindex="-1"><a class="header-anchor" href="#transactional-\u7684\u5E38\u7528\u914D\u7F6E\u53C2\u6570" aria-hidden="true">#</a> @Transactional \u7684\u5E38\u7528\u914D\u7F6E\u53C2\u6570</h3><p>\u867D\u7136 @Transactional \u6CE8\u89E3\u6E90\u7801\u4E2D\u5B9A\u4E49\u4E86\u5F88\u591A\u5C5E\u6027\uFF0C\u4F46\u5927\u591A\u6570\u65F6\u5019\uFF0C\u6211\u90FD\u662F\u91C7\u7528\u9ED8\u8BA4\u914D\u7F6E\uFF0C\u5F53\u7136\u4E86\uFF0C\u5982\u679C\u9700\u8981\u81EA\u5B9A\u4E49\u7684\u8BDD\uFF0C\u524D\u9762\u4E5F\u90FD\u8BF4\u660E\u8FC7\u4E86\u3002</p><h3 id="transactional-\u7684\u4F7F\u7528\u6CE8\u610F\u4E8B\u9879\u603B\u7ED3" tabindex="-1"><a class="header-anchor" href="#transactional-\u7684\u4F7F\u7528\u6CE8\u610F\u4E8B\u9879\u603B\u7ED3" aria-hidden="true">#</a> @Transactional \u7684\u4F7F\u7528\u6CE8\u610F\u4E8B\u9879\u603B\u7ED3</h3><p>1\uFF09\u8981\u5728 public \u65B9\u6CD5\u4E0A\u4F7F\u7528\uFF0C\u5728AbstractFallbackTransactionAttributeSource\u7C7B\u7684computeTransactionAttribute\u65B9\u6CD5\u4E2D\u6709\u4E2A\u5224\u65AD\uFF0C\u5982\u679C\u76EE\u6807\u65B9\u6CD5\u4E0D\u662Fpublic\uFF0C\u5219TransactionAttribute\u8FD4\u56DEnull\uFF0C\u5373\u4E0D\u652F\u6301\u4E8B\u52A1\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">protected</span> <span class="token class-name">TransactionAttribute</span> <span class="token function">computeTransactionAttribute</span><span class="token punctuation">(</span><span class="token class-name">Method</span> method<span class="token punctuation">,</span> <span class="token annotation punctuation">@Nullable</span> <span class="token class-name">Class</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token operator">?</span><span class="token punctuation">&gt;</span></span> targetClass<span class="token punctuation">)</span> <span class="token punctuation">{</span>
     <span class="token comment">// Don&#39;t allow no-public methods as required.</span>
     <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token function">allowPublicMethodsOnly</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">&amp;&amp;</span> <span class="token operator">!</span><span class="token class-name">Modifier</span><span class="token punctuation">.</span><span class="token function">isPublic</span><span class="token punctuation">(</span>method<span class="token punctuation">.</span><span class="token function">getModifiers</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
       <span class="token keyword">return</span> <span class="token keyword">null</span><span class="token punctuation">;</span>
@@ -161,10 +161,10 @@ import{_ as i}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o as c,
     <span class="token punctuation">}</span>
     <span class="token keyword">return</span> <span class="token keyword">null</span><span class="token punctuation">;</span>
   <span class="token punctuation">}</span>
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>2\uFF09\u907F\u514D\u540C\u4E00\u4E2A\u7C7B\u4E2D\u8C03\u7528 @Transactional \u6CE8\u89E3\u7684\u65B9\u6CD5\uFF0C\u8FD9\u6837\u4F1A\u5BFC\u81F4\u4E8B\u52A1\u5931\u6548\u3002</p><p>\u66F4\u591A\u4E8B\u52A1\u5931\u6548\u7684\u573A\u666F\u53EF\u4EE5\u53C2\u8003\uFF1A</p>`,14),y={href:"https://mp.weixin.qq.com/s/qoWlR4ohVMfZf8IlhdSQDQ",target:"_blank",rel:"noopener noreferrer"},_=a("https://mp.weixin.qq.com/s/qoWlR4ohVMfZf8IlhdSQDQ"),w=e(`<h3 id="\u6D4B\u8BD5\u4E8B\u52A1\u662F\u5426\u8D77\u6548" tabindex="-1"><a class="header-anchor" href="#\u6D4B\u8BD5\u4E8B\u52A1\u662F\u5426\u8D77\u6548" aria-hidden="true">#</a> \u6D4B\u8BD5\u4E8B\u52A1\u662F\u5426\u8D77\u6548</h3><p>\u5728\u6D4B\u8BD5\u4E4B\u524D\uFF0C\u6211\u4EEC\u5148\u628A Spring Boot \u9ED8\u8BA4\u7684\u65E5\u5FD7\u7EA7\u522B info \u8C03\u6574\u4E3A debug\uFF0C\u5728 application.yml \u6587\u4EF6\u4E2D \u4FEE\u6539\uFF1A</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>logging:
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>2\uFF09\u907F\u514D\u540C\u4E00\u4E2A\u7C7B\u4E2D\u8C03\u7528 @Transactional \u6CE8\u89E3\u7684\u65B9\u6CD5\uFF0C\u8FD9\u6837\u4F1A\u5BFC\u81F4\u4E8B\u52A1\u5931\u6548\u3002</p><p>\u66F4\u591A\u4E8B\u52A1\u5931\u6548\u7684\u573A\u666F\u53EF\u4EE5\u53C2\u8003\uFF1A</p>`,14),T={href:"https://mp.weixin.qq.com/s/qoWlR4ohVMfZf8IlhdSQDQ",target:"_blank",rel:"noopener noreferrer"},f=a("https://mp.weixin.qq.com/s/qoWlR4ohVMfZf8IlhdSQDQ"),y=e(`<h2 id="\u6D4B\u8BD5\u4E8B\u52A1\u662F\u5426\u8D77\u6548" tabindex="-1"><a class="header-anchor" href="#\u6D4B\u8BD5\u4E8B\u52A1\u662F\u5426\u8D77\u6548" aria-hidden="true">#</a> \u6D4B\u8BD5\u4E8B\u52A1\u662F\u5426\u8D77\u6548</h2><p>\u5728\u6D4B\u8BD5\u4E4B\u524D\uFF0C\u6211\u4EEC\u5148\u628A Spring Boot \u9ED8\u8BA4\u7684\u65E5\u5FD7\u7EA7\u522B info \u8C03\u6574\u4E3A debug\uFF0C\u5728 application.yml \u6587\u4EF6\u4E2D \u4FEE\u6539\uFF1A</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>logging:
   level:
     org:
       hibernate: debug
       springframework:
         web: debug
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>\u7136\u540E\uFF0C\u6765\u770B\u4FEE\u6539\u4E4B\u524D\u67E5\u5230\u7684\u6570\u636E\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/transaction-f81603c2-a36a-4336-ae56-58f4d381e101.png" alt=""></p><p>\u5F00\u641E\u3002\u5728\u63A7\u5236\u5668\u4E2D\u6DFB\u52A0\u4E00\u4E2A update \u63A5\u53E3\uFF0C\u51C6\u5907\u4FEE\u6539\u6570\u636E\uFF0C\u6253\u7B97\u628A\u6C89\u9ED8\u738B\u4E8C\u7684\u72D7\u817F\u5B50\u4FEE\u6539\u4E3A\u6C89\u9ED8\u738B\u4E8C\u7684\u72D7\u817F\uFF1A</p><hr>`,7),E=a("\u66F4\u591A\u5185\u5BB9\uFF0C\u53EA\u9488\u5BF9\u300AJava \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF\u300B\u661F\u7403\u7528\u6237\u5F00\u653E\uFF0C\u9700\u8981\u7684\u5C0F\u4F19\u4F34\u53EF\u4EE5"),A=a("\u6233\u94FE\u63A5\u{1F517}"),R=a("\u52A0\u5165\u6211\u4EEC\u7684\u661F\u7403\uFF0C\u4E00\u8D77\u5B66\u4E60\uFF0C\u4E00\u8D77\u5377\u3002\u3002"),P=n("strong",null,"\u7F16\u7A0B\u55B5",-1),I=a("\u{1F431}\u662F\u4E00\u4E2A Spring Boot+Vue \u7684\u524D\u540E\u7AEF\u5206\u79BB\u9879\u76EE\uFF0C\u878D\u5408\u4E86\u5E02\u9762\u4E0A\u7EDD\u5927\u591A\u6570\u6D41\u884C\u7684\u6280\u672F\u8981\u70B9\u3002\u901A\u8FC7\u5B66\u4E60\u5B9E\u6218\u9879\u76EE\uFF0C\u4F60\u53EF\u4EE5\u5C06\u6240\u5B66\u7684\u77E5\u8BC6\u901A\u8FC7\u5B9E\u8DF5\u8FDB\u884C\u68C0\u9A8C\u3001\u4F60\u53EF\u4EE5\u62D3\u5BBD\u81EA\u5DF1\u7684\u6280\u672F\u8FB9\u754C\uFF0C\u4F60\u53EF\u4EE5\u638C\u63E1\u4E00\u4E2A\u771F\u6B63\u7684\u5B9E\u6218\u9879\u76EE\u662F\u5982\u4F55\u4ECE 0 \u5230 1 \u7684\u3002"),M=n("hr",null,null,-1),x=a("\u7F16\u7A0B\u55B5\uFF1A"),O={href:"https://github.com/itwanger/coding-more",target:"_blank",rel:"noopener noreferrer"},D=a("https://github.com/itwanger/coding-more"),S=a("\u672C\u9879\u76EE\u6E90\u7801\uFF1A"),j={href:"https://github.com/itwanger/codingmore-learning/tree/main/codingmore-transactional",target:"_blank",rel:"noopener noreferrer"},L=a("https://github.com/itwanger/codingmore-learning"),U=n("p",null,[n("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png",alt:""})],-1);function N(Q,B){const t=p("ExternalLinkIcon"),o=p("RouterLink");return c(),l("div",null,[d,n("p",null,[k,n("a",v,[m,s(t)]),b]),h,n("p",null,[n("a",g,[T,s(t)])]),f,n("blockquote",null,[n("p",null,[n("a",y,[_,s(t)])])]),w,n("p",null,[E,s(o,{to:"/springboot/docs/zhishixingqiu/"},{default:u(()=>[A]),_:1}),R,P,I]),M,n("blockquote",null,[n("ul",null,[n("li",null,[x,n("a",O,[D,s(t)])]),n("li",null,[S,n("a",j,[L,s(t)])])])]),U])}var F=i(r,[["render",N],["__file","transaction.html.vue"]]);export{F as default};
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>\u7136\u540E\uFF0C\u6765\u770B\u4FEE\u6539\u4E4B\u524D\u67E5\u5230\u7684\u6570\u636E\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/transaction-f81603c2-a36a-4336-ae56-58f4d381e101.png" alt=""></p><p>\u5F00\u641E\u3002\u5728\u63A7\u5236\u5668\u4E2D\u6DFB\u52A0\u4E00\u4E2A update \u63A5\u53E3\uFF0C\u51C6\u5907\u4FEE\u6539\u6570\u636E\uFF0C\u6253\u7B97\u628A\u6C89\u9ED8\u738B\u4E8C\u7684\u72D7\u817F\u5B50\u4FEE\u6539\u4E3A\u6C89\u9ED8\u738B\u4E8C\u7684\u72D7\u817F\uFF1A</p><hr>`,7),_=a("\u66F4\u591A\u5185\u5BB9\uFF0C\u53EA\u9488\u5BF9\u300AJava \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF\u300B\u661F\u7403\u7528\u6237\u5F00\u653E\uFF0C\u9700\u8981\u7684\u5C0F\u4F19\u4F34\u53EF\u4EE5"),w={href:"https://tobebetterjavaer.com/zhishixingqiu/",target:"_blank",rel:"noopener noreferrer"},E=a("\u6233\u94FE\u63A5\u{1F517}"),A=a("\u52A0\u5165\u6211\u4EEC\u7684\u661F\u7403\uFF0C\u4E00\u8D77\u5B66\u4E60\uFF0C\u4E00\u8D77\u5377\u3002\u3002"),R=n("strong",null,"\u7F16\u7A0B\u55B5",-1),P=a("\u{1F431}\u662F\u4E00\u4E2A Spring Boot+Vue \u7684\u524D\u540E\u7AEF\u5206\u79BB\u9879\u76EE\uFF0C\u878D\u5408\u4E86\u5E02\u9762\u4E0A\u7EDD\u5927\u591A\u6570\u6D41\u884C\u7684\u6280\u672F\u8981\u70B9\u3002\u901A\u8FC7\u5B66\u4E60\u5B9E\u6218\u9879\u76EE\uFF0C\u4F60\u53EF\u4EE5\u5C06\u6240\u5B66\u7684\u77E5\u8BC6\u901A\u8FC7\u5B9E\u8DF5\u8FDB\u884C\u68C0\u9A8C\u3001\u4F60\u53EF\u4EE5\u62D3\u5BBD\u81EA\u5DF1\u7684\u6280\u672F\u8FB9\u754C\uFF0C\u4F60\u53EF\u4EE5\u638C\u63E1\u4E00\u4E2A\u771F\u6B63\u7684\u5B9E\u6218\u9879\u76EE\u662F\u5982\u4F55\u4ECE 0 \u5230 1 \u7684\u3002"),I=n("hr",null,null,-1),M=a("\u7F16\u7A0B\u55B5\uFF1A"),x={href:"https://github.com/itwanger/coding-more",target:"_blank",rel:"noopener noreferrer"},O=a("https://github.com/itwanger/coding-more"),D=a("\u672C\u9879\u76EE\u6E90\u7801\uFF1A"),S={href:"https://github.com/itwanger/codingmore-learning/tree/main/codingmore-transactional",target:"_blank",rel:"noopener noreferrer"},j=a("https://github.com/itwanger/codingmore-learning"),U=n("p",null,[n("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png",alt:""})],-1);function L(N,Q){const s=o("ExternalLinkIcon");return i(),c("div",null,[u,n("p",null,[r,n("a",d,[k,t(s)]),v]),m,n("p",null,[n("a",b,[h,t(s)])]),g,n("blockquote",null,[n("p",null,[n("a",T,[f,t(s)])])]),y,n("p",null,[_,n("a",w,[E,t(s)]),A,R,P]),I,n("blockquote",null,[n("ul",null,[n("li",null,[M,n("a",x,[O,t(s)])]),n("li",null,[D,n("a",S,[j,t(s)])])])]),U])}var q=p(l,[["render",L],["__file","transaction.html.vue"]]);export{q as default};
diff --git a/dist/assets/true-generic.html.dbcaca38.js b/dist/assets/true-generic.html.a683e7b2.js
similarity index 99%
rename from dist/assets/true-generic.html.dbcaca38.js
rename to dist/assets/true-generic.html.a683e7b2.js
index 87526f9c..c417d5dd 100644
--- a/dist/assets/true-generic.html.dbcaca38.js
+++ b/dist/assets/true-generic.html.a683e7b2.js
@@ -1,4 +1,4 @@
-import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e as t}from"./app.a0271b9c.js";const e={},p=t(`<h1 id="java\u4E0D\u80FD\u5B9E\u73B0\u771F\u6B63\u6CDB\u578B\u7684\u539F\u56E0\u662F\u4EC0\u4E48" tabindex="-1"><a class="header-anchor" href="#java\u4E0D\u80FD\u5B9E\u73B0\u771F\u6B63\u6CDB\u578B\u7684\u539F\u56E0\u662F\u4EC0\u4E48" aria-hidden="true">#</a> Java\u4E0D\u80FD\u5B9E\u73B0\u771F\u6B63\u6CDB\u578B\u7684\u539F\u56E0\u662F\u4EC0\u4E48\uFF1F</h1><p>\u201C\u4E8C\u54E5\uFF0C\u4E3A\u5565 Java \u4E0D\u80FD\u5B9E\u73B0\u771F\u6B63\u6CDB\u578B\u554A\uFF1F\u201D\u4E09\u59B9\u5F00\u95E8\u89C1\u5C71\u5730\u95EE\u3002</p><p>\u7B80\u5355\u6765\u56DE\u987E\u4E00\u4E0B\u7C7B\u578B\u64E6\u9664\uFF0C\u770B\u4E0B\u9762\u8FD9\u6BB5\u4EE3\u7801\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">Cmower</span> <span class="token punctuation">{</span>
+import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e as t}from"./app.615e41d8.js";const e={},p=t(`<h1 id="java\u4E0D\u80FD\u5B9E\u73B0\u771F\u6B63\u6CDB\u578B\u7684\u539F\u56E0\u662F\u4EC0\u4E48" tabindex="-1"><a class="header-anchor" href="#java\u4E0D\u80FD\u5B9E\u73B0\u771F\u6B63\u6CDB\u578B\u7684\u539F\u56E0\u662F\u4EC0\u4E48" aria-hidden="true">#</a> Java\u4E0D\u80FD\u5B9E\u73B0\u771F\u6B63\u6CDB\u578B\u7684\u539F\u56E0\u662F\u4EC0\u4E48\uFF1F</h1><p>\u201C\u4E8C\u54E5\uFF0C\u4E3A\u5565 Java \u4E0D\u80FD\u5B9E\u73B0\u771F\u6B63\u6CDB\u578B\u554A\uFF1F\u201D\u4E09\u59B9\u5F00\u95E8\u89C1\u5C71\u5730\u95EE\u3002</p><p>\u7B80\u5355\u6765\u56DE\u987E\u4E00\u4E0B\u7C7B\u578B\u64E6\u9664\uFF0C\u770B\u4E0B\u9762\u8FD9\u6BB5\u4EE3\u7801\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">Cmower</span> <span class="token punctuation">{</span>
     <span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">void</span> <span class="token function">method</span><span class="token punctuation">(</span><span class="token class-name">ArrayList</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">String</span><span class="token punctuation">&gt;</span></span> list<span class="token punctuation">)</span> <span class="token punctuation">{</span>
         <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">&quot;Arraylist&lt;String&gt; list&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
     <span class="token punctuation">}</span>
diff --git a/dist/assets/try-with-resouces.html.c242816c.js b/dist/assets/try-with-resouces.html.52a831d4.js
similarity index 99%
rename from dist/assets/try-with-resouces.html.c242816c.js
rename to dist/assets/try-with-resouces.html.52a831d4.js
index 4e69ae66..aba3cd41 100644
--- a/dist/assets/try-with-resouces.html.c242816c.js
+++ b/dist/assets/try-with-resouces.html.52a831d4.js
@@ -1,4 +1,4 @@
-import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e}from"./app.a0271b9c.js";const t={},p=e(`<h1 id="\u8BE6\u89E3java7\u65B0\u589E\u7684try-with-resouces\u8BED\u6CD5" tabindex="-1"><a class="header-anchor" href="#\u8BE6\u89E3java7\u65B0\u589E\u7684try-with-resouces\u8BED\u6CD5" aria-hidden="true">#</a> \u8BE6\u89E3Java7\u65B0\u589E\u7684try-with-resouces\u8BED\u6CD5</h1><p>\u201C\u4E8C\u54E5\uFF0C\u7EC8\u4E8E\u7B49\u5230\u4F60\u8BB2 try-with-resouces \u4E86\uFF01\u201D\u4E09\u59B9\u5938\u5F20\u7684\u8868\u60C5\u8BA9\u6211\u6709\u4E9B\u5403\u60CA\u3002</p><p>\u201C\u4E09\u59B9\uFF0C\u4E0D\u8981\u6FC0\u52A8\u5440\uFF01\u5F00\u8BB2\u4E4B\u524D\uFF0C\u6211\u4EEC\u8FD8\u662F\u8981\u6765\u56DE\u987E\u4E00\u4E0B try\u2013catch-finally\uFF0C\u597D\u505A\u4E2A\u94FA\u57AB\u3002\u201D\u6211\u8BF4\uFF0C\u201C\u6765\u770B\u770B\u8FD9\u6BB5\u4EE3\u7801\u5427\u3002\u201D</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">TrycatchfinallyDecoder</span> <span class="token punctuation">{</span>
+import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e}from"./app.615e41d8.js";const t={},p=e(`<h1 id="\u8BE6\u89E3java7\u65B0\u589E\u7684try-with-resouces\u8BED\u6CD5" tabindex="-1"><a class="header-anchor" href="#\u8BE6\u89E3java7\u65B0\u589E\u7684try-with-resouces\u8BED\u6CD5" aria-hidden="true">#</a> \u8BE6\u89E3Java7\u65B0\u589E\u7684try-with-resouces\u8BED\u6CD5</h1><p>\u201C\u4E8C\u54E5\uFF0C\u7EC8\u4E8E\u7B49\u5230\u4F60\u8BB2 try-with-resouces \u4E86\uFF01\u201D\u4E09\u59B9\u5938\u5F20\u7684\u8868\u60C5\u8BA9\u6211\u6709\u4E9B\u5403\u60CA\u3002</p><p>\u201C\u4E09\u59B9\uFF0C\u4E0D\u8981\u6FC0\u52A8\u5440\uFF01\u5F00\u8BB2\u4E4B\u524D\uFF0C\u6211\u4EEC\u8FD8\u662F\u8981\u6765\u56DE\u987E\u4E00\u4E0B try\u2013catch-finally\uFF0C\u597D\u505A\u4E2A\u94FA\u57AB\u3002\u201D\u6211\u8BF4\uFF0C\u201C\u6765\u770B\u770B\u8FD9\u6BB5\u4EE3\u7801\u5427\u3002\u201D</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">TrycatchfinallyDecoder</span> <span class="token punctuation">{</span>
     <span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">void</span> <span class="token function">main</span><span class="token punctuation">(</span><span class="token class-name">String</span><span class="token punctuation">[</span><span class="token punctuation">]</span> args<span class="token punctuation">)</span> <span class="token punctuation">{</span>
         <span class="token class-name">BufferedReader</span> br <span class="token operator">=</span> <span class="token keyword">null</span><span class="token punctuation">;</span>
         <span class="token keyword">try</span> <span class="token punctuation">{</span>
diff --git a/dist/assets/tujie-gc.html.70c281f0.js b/dist/assets/tujie-gc.html.3ec6a37b.js
similarity index 99%
rename from dist/assets/tujie-gc.html.70c281f0.js
rename to dist/assets/tujie-gc.html.3ec6a37b.js
index 889a8be2..450cd4aa 100644
--- a/dist/assets/tujie-gc.html.70c281f0.js
+++ b/dist/assets/tujie-gc.html.3ec6a37b.js
@@ -1 +1 @@
-import{_ as a}from"./plugin-vue_export-helper.21dcd24c.js";import{r as o,o as p,c as v,a as e,b as c,e as i,d as r}from"./app.a0271b9c.js";const n={},b=i('<h1 id="\u56FE\u89E3java\u7684\u5783\u573E\u56DE\u6536\u673A\u5236" tabindex="-1"><a class="header-anchor" href="#\u56FE\u89E3java\u7684\u5783\u573E\u56DE\u6536\u673A\u5236" aria-hidden="true">#</a> \u56FE\u89E3Java\u7684\u5783\u573E\u56DE\u6536\u673A\u5236</h1><p>\u5783\u573E\u56DE\u6536\u662F\u4E00\u79CD\u5728\u5806\u5185\u5B58\u4E2D\u627E\u51FA\u54EA\u4E9B\u5BF9\u8C61\u5728\u88AB\u4F7F\u7528\uFF0C\u8FD8\u6709\u54EA\u4E9B\u5BF9\u8C61\u6CA1\u88AB\u4F7F\u7528\uFF0C\u5E76\u4E14\u5C06\u540E\u8005\u56DE\u6536\u6389\u7684\u673A\u5236\u3002</p><p>\u6240\u8C13\u4F7F\u7528\u4E2D\u7684\u5BF9\u8C61\uFF0C\u6307\u7684\u662F\u7A0B\u5E8F\u4E2D\u8FD8\u6709\u5F15\u7528\u7684\u5BF9\u8C61\uFF1B\u800C\u672A\u4F7F\u7528\u4E2D\u7684\u5BF9\u8C61\uFF0C\u6307\u7684\u662F\u7A0B\u5E8F\u4E2D\u5DF2\u7ECF\u6CA1\u6709\u5F15\u7528\u7684\u5BF9\u8C61\uFF0C\u8BE5\u5BF9\u8C61\u5360\u7528\u7684\u5185\u5B58\u4E5F\u53EF\u4EE5\u88AB\u56DE\u6536\u6389\u3002</p><p>Java \u8BED\u8A00\u51FA\u6765\u4E4B\u524D\uFF0C\u5927\u5BB6\u90FD\u5728\u62FC\u547D\u7684\u5199 C \u6216\u8005 C++ \u7684\u7A0B\u5E8F\uFF0C\u6B64\u65F6\u5B58\u5728\u4E00\u4E2A\u5F88\u5927\u7684\u77DB\u76FE\uFF0CC++ \u7B49\u8BED\u8A00\u521B\u5EFA\u5BF9\u8C61\u9700\u8981\u4E0D\u65AD\u7684\u53BB\u5F00\u8F9F\u7A7A\u95F4\uFF0C\u4E0D\u7528\u7684\u65F6\u5019\u53C8\u9700\u8981\u4E0D\u65AD\u7684\u53BB\u91CA\u653E\u7A7A\u95F4\uFF0C\u65E2\u8981\u5199\u6784\u9020\u51FD\u6570\uFF0C\u53C8\u8981\u5199\u6790\u6784\u51FD\u6570\uFF0C\u5F88\u591A\u65F6\u5019\u90FD\u5728\u91CD\u590D\u7684 allocated\uFF0C\u7136\u540E\u4E0D\u505C\u7684\u6790\u6784\u3002\u800C Java \u4E0D\u4E00\u6837\uFF0C\u5B83\u6709\u5783\u573E\u56DE\u6536\u5668\uFF0C\u91CA\u653E\u5185\u5B58\u7531\u56DE\u6536\u5668\u8D1F\u8D23\u3002</p><p>\u5783\u573E\u56DE\u6536\u7684\u7B2C\u4E00\u6B65\u662F\u6807\u8BB0\u3002\u5783\u573E\u56DE\u6536\u5668\u6B64\u65F6\u4F1A\u627E\u51FA\u5185\u5B58\u54EA\u4E9B\u5728\u4F7F\u7528\u4E2D\uFF0C\u54EA\u4E9B\u4E0D\u662F\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/tujie-gc-9858785a-c6aa-4d6d-a6cd-640d24dd27d0.png" alt=""></p><p>\u4E0A\u56FE\u4E2D\uFF0C\u84DD\u8272\u8868\u793A\u5DF2\u5F15\u7528\u5BF9\u8C61\uFF0C\u6A59\u8272\u8868\u793A\u672A\u5F15\u7528\u5BF9\u8C61\u3002\u5783\u573E\u56DE\u6536\u5668\u8981\u68C0\u67E5\u5B8C\u6240\u6709\u7684\u5BF9\u8C61\uFF0C\u624D\u80FD\u77E5\u9053\u54EA\u4E9B\u6709\u88AB\u5F15\u7528\uFF0C\u54EA\u4E9B\u6CA1\u3002\u5982\u679C\u7CFB\u7EDF\u91CC\u6240\u6709\u7684\u5BF9\u8C61\u90FD\u8981\u68C0\u67E5\uFF0C\u90A3\u8FD9\u4E00\u6B65\u53EF\u80FD\u4F1A\u76F8\u5F53\u8017\u65F6\u95F4\u3002</p><p>\u5783\u573E\u56DE\u6536\u7684\u7B2C\u4E8C\u6B65\u662F\u6E05\u9664\uFF0C\u8FD9\u4E00\u6B65\u4F1A\u5220\u6389\u6807\u8BB0\u51FA\u7684\u672A\u5F15\u7528\u5BF9\u8C61\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/tujie-gc-768f5a2c-6c81-4f76-b847-a41cc8413228.png" alt=""></p><p>\u5185\u5B58\u5206\u914D\u5668\u4F1A\u4FDD\u7559\u6307\u5411\u53EF\u7528\u5185\u5B58\u4E2D\u7684\u5F15\u7528\uFF0C\u4EE5\u5206\u914D\u7ED9\u65B0\u7684\u5BF9\u8C61\u3002</p><p>\u5783\u573E\u56DE\u6536\u7684\u7B2C\u4E09\u6B65\u662F\u538B\u7F29\uFF0C\u4E3A\u4E86\u63D0\u5347\u6027\u80FD\uFF0C\u5220\u9664\u4E86\u672A\u5F15\u7528\u5BF9\u8C61\u540E\uFF0C\u8FD8\u53EF\u4EE5\u5C06\u5269\u4E0B\u7684\u5DF2\u5F15\u7528\u5BF9\u8C61\u653E\u5728\u4E00\u8D77\uFF08\u538B\u7F29\uFF09\uFF0C\u8FD9\u6837\u5C31\u80FD\u66F4\u7B80\u5355\u5FEB\u6377\u5730\u5206\u914D\u65B0\u5BF9\u8C61\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/tujie-gc-989889b6-adb4-4277-8c67-73d76658f744.png" alt=""></p><p>\u4E4B\u524D\u63D0\u5230\u8FC7\uFF0C\u9010\u4E00\u6807\u8BB0\u548C\u538B\u7F29 \xA0Java \u865A\u62DF\u673A\u4E2D\u7684\u6240\u6709\u5BF9\u8C61\u975E\u5E38\u4F4E\u6548\uFF1A\u5206\u914D\u7684\u5BF9\u8C61\u8D8A\u591A\uFF0C\u5783\u573E\u56DE\u6536\u9700\u8981\u7684\u65F6\u95F4\u5C31\u8D8A\u4E45\u3002\u4E0D\u8FC7\uFF0C\u6839\u636E\u7EDF\u8BA1\uFF0C\u5927\u90E8\u5206\u7684\u5BF9\u8C61\uFF0C\u5176\u5B9E\u7528\u6CA1\u591A\u4E45\u5C31\u4E0D\u7528\u4E86\u3002</p><p>\u6765\u770B\u4E2A\u4F8B\u5B50\u5427\u3002\u4E0B\u56FE\u4E2D\uFF0C\u7AD6\u8F74\u4EE3\u8868\u5DF2\u5206\u914D\u7684\u5B57\u8282\uFF0C\u800C\u6A2A\u8F74\u4EE3\u8868\u7A0B\u5E8F\u7684\u8FD0\u884C\u65F6\u95F4\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/tujie-gc-24b154be-4ad0-4cc7-87e9-a3035bc9e3c5.png" alt=""></p><p>\u53EF\u89C1\uFF0C\u5B58\u6D3B\uFF08\u6CA1\u88AB\u91CA\u653E\uFF09\u7684\u5BF9\u8C61\u968F\u7740\u8FD0\u884C\u65F6\u95F4\u8D8A\u6765\u8D8A\u5C11\u3002\u56FE\u4E2D\u5DE6\u4FA7\u7684\u5CF0\u503C\uFF0C\u4E5F\u8868\u660E\u4E86\u5927\u90E8\u5206\u5BF9\u8C61\u5176\u5B9E\u90FD\u633A\u77ED\u547D\u7684\u3002</p><p>\u5230\u8FD9\uFF0C\u8FD9\u7BC7\u5185\u5BB9\u5C31\u5206\u4E3A\u4E24\u90E8\u5206\u4E86\uFF0C\u4E00\u90E8\u5206\u662F\u56FD\u5916\u5927\u795E\u7684\u8BB2\u89E3\uFF0C\u4E00\u90E8\u5206\u662F\u963F\u91CC\u5927\u795E\u7684\u8BB2\u89E3\u3002\u5148\u6765\u770B\u56FD\u5916\u5927\u795E\u7684\u3002</p><hr><p>\u6839\u636E\u4E4B\u524D\u7684\u89C4\u5F8B\uFF0C\u5C31\u53EF\u4EE5\u7528\u6765\u63D0\u5347 JVM \u7684\u6548\u7387\u4E86\u3002\u65B9\u6CD5\u662F\uFF0C\u628A\u5806\u5206\u6210\u51E0\u4E2A\u90E8\u5206\uFF08\u5C31\u662F\u6240\u8C13\u7684\u5206\u4EE3\uFF09\uFF0C\u5206\u522B\u662F\u65B0\u751F\u4EE3\u3001\u8001\u5E74\u4EE3\uFF0C\u4EE5\u53CA\u6C38\u751F\u4EE3\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/tujie-gc-590c5011-48c4-4543-bd26-6f14c2b8614b.png" alt=""></p><p>\u65B0\u5BF9\u8C61\u4F1A\u88AB\u5206\u914D\u5728\u65B0\u751F\u4EE3\u5185\u5B58\u3002\u4E00\u65E6\u65B0\u751F\u4EE3\u5185\u5B58\u6EE1\u4E86\uFF0C\u5C31\u4F1A\u5F00\u59CB\u5BF9\u6B7B\u6389\u7684\u5BF9\u8C61\uFF0C\u8FDB\u884C\u6240\u8C13\u7684\u5C0F\u578B\u5783\u573E\u56DE\u6536\uFF08Minor GC\uFF09\u8FC7\u7A0B\u3002\u4E00\u7247\u65B0\u751F\u4EE3\u5185\u5B58\u91CC\uFF0C\u6B7B\u6389\u7684\u8D8A\u591A\uFF0C\u56DE\u6536\u8FC7\u7A0B\u5C31\u8D8A\u5FEB\uFF1B\u81F3\u4E8E\u90A3\u4E9B\u8FD8\u6D3B\u7740\u7684\u5BF9\u8C61\uFF0C\u6B64\u65F6\u5C31\u4F1A\u8001\u5316\uFF0C\u5E76\u6700\u7EC8\u8001\u5230\u8FDB\u5165\u8001\u5E74\u4EE3\u5185\u5B58\u3002</p><p>Stop the World \u4E8B\u4EF6 \u2014\u2014 \u5C0F\u578B\u5783\u573E\u56DE\u6536\u5C5E\u4E8E\u4E00\u79CD\u53EB &quot;Stop the World&quot; \u7684\u4E8B\u4EF6\u3002\u5728\u8FD9\u79CD\u4E8B\u4EF6\u53D1\u751F\u65F6\uFF0C\u6240\u6709\u7684\u7A0B\u5E8F\u7EBF\u7A0B\u90FD\u8981\u6682\u505C\uFF0C\u76F4\u5230\u4E8B\u4EF6\u5B8C\u6210\uFF08\u6BD4\u5982\u8FD9\u91CC\u5C31\u662F\u5B8C\u6210\u4E86\u6240\u6709\u56DE\u6536\u5DE5\u4F5C\uFF09\u4E3A\u6B62\u3002</p><p>\u8001\u5E74\u4EE3\u7528\u6765\u4FDD\u5B58\u957F\u65F6\u95F4\u5B58\u6D3B\u7684\u5BF9\u8C61\u3002\u901A\u5E38\uFF0C\u8BBE\u7F6E\u4E00\u4E2A\u9608\u503C\uFF0C\u5F53\u8FBE\u5230\u8BE5\u5E74\u9F84\u65F6\uFF0C\u5E74\u8F7B\u4EE3\u5BF9\u8C61\u4F1A\u88AB\u79FB\u52A8\u5230\u8001\u5E74\u4EE3\u3002\u6700\u7EC8\u8001\u5E74\u4EE3\u4E5F\u4F1A\u88AB\u56DE\u6536\u3002\u8FD9\u4E2A\u4E8B\u4EF6\u4E3A Major GC\u3002</p><p>Major GC \u4E5F\u4F1A\u89E6\u53D1STW\uFF08Stop the World\uFF09\u3002\u901A\u5E38\uFF0CMajor GC\u4F1A\u6162\u5F88\u591A\uFF0C\u56E0\u4E3A\u5B83\u6D89\u53CA\u5230\u6240\u6709\u5B58\u6D3B\u5BF9\u8C61\u3002\u6240\u4EE5\uFF0C\u5BF9\u4E8E\u54CD\u5E94\u6027\u7684\u5E94\u7528\u7A0B\u5E8F\uFF0C\u5E94\u8BE5\u5C3D\u91CF\u907F\u514DMajor GC\u3002\u8FD8\u8981\u6CE8\u610F\uFF0CMajor GC\u7684STW\u7684\u65F6\u957F\u53D7\u5E74\u8001\u4EE3\u5783\u573E\u56DE\u6536\u5668\u7C7B\u578B\u7684\u5F71\u54CD\u3002</p><p>\u6C38\u4E45\u4EE3\u5305\u542BJVM\u7528\u4E8E\u63CF\u8FF0\u5E94\u7528\u7A0B\u5E8F\u4E2D\u7C7B\u548C\u65B9\u6CD5\u7684\u5143\u6570\u636E\u3002\u6C38\u4E45\u4EE3\u662F\u7531JVM\u5728\u8FD0\u884C\u65F6\u6839\u636E\u5E94\u7528\u7A0B\u5E8F\u4F7F\u7528\u7684\u7C7B\u6765\u586B\u5145\u7684\u3002\u6B64\u5916\uFF0CJava SE\u7C7B\u5E93\u548C\u65B9\u6CD5\u4E5F\u5B58\u50A8\u5728\u8FD9\u91CC\u3002</p><p>\u5982\u679CJVM\u53D1\u73B0\u67D0\u4E9B\u7C7B\u4E0D\u518D\u9700\u8981\uFF0C\u5E76\u4E14\u5176\u4ED6\u7C7B\u53EF\u80FD\u9700\u8981\u7A7A\u95F4\uFF0C\u5219\u8FD9\u4E9B\u7C7B\u53EF\u80FD\u4F1A\u88AB\u56DE\u6536\u3002</p><p>\u9996\u5148\uFF0C\u5C06\u4EFB\u4F55\u65B0\u5BF9\u8C61\u5206\u914D\u7ED9 eden \u7A7A\u95F4\u3002 \u4E24\u4E2A survivor\xA0\u7A7A\u95F4\u90FD\u662F\u7A7A\u7684\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/tujie-gc-efe9657b-c7a6-48a8-9037-0e709b1d236c.jpg" alt=""></p><p>\u5F53 eden\xA0\u7A7A\u95F4\u586B\u6EE1\u65F6\uFF0C\u4F1A\u89E6\u53D1\u8F7B\u5FAE\u7684\u5783\u573E\u6536\u96C6\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/tujie-gc-2497947b-92b5-4a7c-9399-1909a3153660.jpg" alt=""></p><p>\u5F15\u7528\u7684\u5BF9\u8C61\u88AB\u79FB\u52A8\u5230\u7B2C\u4E00\u4E2A survivor\xA0\u7A7A\u95F4\u3002 \u6E05\u9664\xA0eden\xA0\u7A7A\u95F4\u65F6\uFF0C\u5C06\u5220\u9664\u672A\u5F15\u7528\u7684\u5BF9\u8C61\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/tujie-gc-2b431315-26fa-4ea0-843a-c63ca568f960.jpg" alt=""></p><p>\u5728\u4E0B\u4E00\u6B21Minor GC\u4E2D\uFF0CEden\u533A\u4E5F\u4F1A\u505A\u540C\u6837\u7684\u64CD\u4F5C\u3002\u5220\u9664\u672A\u88AB\u5F15\u7528\u7684\u5BF9\u8C61\uFF0C\u5E76\u5C06\u88AB\u5F15\u7528\u7684\u5BF9\u8C61\u79FB\u52A8\u5230Survivor\u533A\u3002\u7136\u800C\uFF0C\u8FD9\u91CC\uFF0C\u4ED6\u4EEC\u88AB\u79FB\u52A8\u5230\u4E86\u7B2C\u4E8C\u4E2ASurvivor\u533A\uFF08S1\uFF09\u3002</p><p>\u6B64\u5916\uFF0C\u7B2C\u4E00\u4E2ASurvivor\u533A\uFF08S0\uFF09\u4E2D\uFF0C\u5728\u4E0A\u4E00\u6B21Minor GC\u5E78\u5B58\u7684\u5BF9\u8C61\uFF0C\u4F1A\u589E\u52A0\u5E74\u9F84\uFF0C\u5E76\u88AB\u79FB\u52A8\u5230S1\u4E2D\u3002\u5F85\u6240\u6709\u5E78\u5B58\u5BF9\u8C61\u90FD\u88AB\u79FB\u52A8\u5230S1\u540E\uFF0CS0\u548CEden\u533A\u90FD\u4F1A\u88AB\u6E05\u7A7A\u3002\u6CE8\u610F\uFF0CSurvivor\u533A\u4E2D\u6709\u4E86\u4E0D\u540C\u5E74\u9F84\u7684\u5BF9\u8C61\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/tujie-gc-e2560f59-9b24-4d16-88db-b6ac4d0b6ffe.jpg" alt=""></p><p>\u5728\u4E0B\u4E00\u6B21Minor GC\u4E2D\uFF0C\u4F1A\u91CD\u590D\u540C\u6837\u7684\u64CD\u4F5C\u3002\u4E0D\u8FC7\uFF0C\u8FD9\u4E00\u6B21Survivor\u533A\u4F1A\u4EA4\u6362\u3002\u88AB\u5F15\u7528\u7684\u5BF9\u8C61\u79FB\u52A8\u5230S0,\u3002\u5E78\u5B58\u7684\u5BF9\u8C61\u589E\u52A0\u5E74\u9F84\u3002Eden\u533A\u548CS1\u88AB\u6E05\u7A7A\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/tujie-gc-aa9f883a-12db-4c8b-8391-3c289b53d804.jpg" alt=""></p><p>\u6B64\u5E7B\u706F\u7247\u6F14\u793A\u4E86 promotion\u3002 \u5728\u8F83\u5C0F\u7684GC\u4E4B\u540E\uFF0C\u5F53\u8001\u5316\u7684\u7269\u4F53\u8FBE\u5230\u4E00\u5B9A\u7684\u5E74\u9F84\u9608\u503C\uFF08\u5728\u8BE5\u793A\u4F8B\u4E2D\u4E3A8\uFF09\u65F6\uFF0C\u5B83\u4EEC\u4ECE\u5E74\u8F7B\u4E00\u4EE3\u664B\u5347\u5230\u8001\u4E00\u4EE3\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/tujie-gc-dec96816-2912-4127-aaaa-a4d987123f52.jpg" alt=""></p><p>\u968F\u7740\u8F83\u5C0F\u7684GC\u6301\u7EED\u53D1\u751F\uFF0C\u7269\u4F53\u5C06\u7EE7\u7EED\u88AB\u63A8\u5E7F\u5230\u8001\u4E00\u4EE3\u7A7A\u95F4\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/tujie-gc-6cb31f8a-2eac-489c-88bd-fc643996ab49.jpg" alt=""></p><p>\u6240\u4EE5\u8FD9\u51E0\u4E4E\u6DB5\u76D6\u4E86\u5E74\u8F7B\u4E00\u4EE3\u7684\u6574\u4E2A\u8FC7\u7A0B\u3002 \u6700\u7EC8\uFF0C\u5C06\u4E3B\u8981\u5BF9\u8001\u4E00\u4EE3\u8FDB\u884CGC\uFF0C\u6E05\u7406\u5E76\u6700\u7EC8\u538B\u7F29\u8BE5\u7A7A\u95F4\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/tujie-gc-df98a004-e233-4fb5-a31a-f422033ecfa7.jpg" alt=""></p><hr><p>\u63A5\u4E0B\u6765\uFF0C\u770B\u963F\u91CC\u5927\u795E\u7684\u7248\u672C\u3002</p><p>Java \u5806\uFF08Java Heap\uFF09\u662F JVM \u6240\u7BA1\u7406\u7684\u5185\u5B58\u4E2D\u6700\u5927\u7684\u4E00\u5757\uFF0C\u5806\u53C8\u662F\u5783\u573E\u6536\u96C6\u5668\u7BA1\u7406\u7684\u4E3B\u8981\u533A\u57DF\uFF0C\u8FD9\u91CC\u6211\u4EEC\u4E3B\u8981\u5206\u6790\u4E00\u4E0B Java \u5806\u7684\u7ED3\u6784\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/tujie-gc-294701a5-1c50-4112-94a1-96a8bab80e34.png" alt=""></p><p>Java \u5806\u4E3B\u8981\u5206\u4E3A 2 \u4E2A\u533A\u57DF-\u5E74\u8F7B\u4EE3\u4E0E\u8001\u5E74\u4EE3\uFF0C\u5176\u4E2D\u5E74\u8F7B\u4EE3\u53C8\u5206 Eden \u533A\u548C Survivor \u533A\uFF0C\u5176\u4E2D Survivor \u533A\u53C8\u5206 From \u548C To 2 \u4E2A\u533A\u3002\u53EF\u80FD\u8FD9\u65F6\u5019\u5927\u5BB6\u4F1A\u6709\u7591\u95EE\uFF0C\u4E3A\u4EC0\u4E48\u9700\u8981 Survivor \u533A\uFF0C\u4E3A\u4EC0\u4E48 Survivor \u8FD8\u8981\u5206 2 \u4E2A\u533A\u3002</p><p>\u5927\u591A\u6570\u60C5\u51B5\u4E0B\uFF0C\u5BF9\u8C61\u4F1A\u5728\u65B0\u751F\u4EE3 Eden \u533A\u4E2D\u8FDB\u884C\u5206\u914D\u3002\u5F53 Eden \u533A\u6CA1\u6709\u8DB3\u591F\u7A7A\u95F4\u8FDB\u884C\u5206\u914D\u65F6\uFF0C\u865A\u62DF\u673A\u4F1A\u53D1\u8D77\u4E00\u6B21 Minor GC\uFF0CMinor GC \u76F8\u6BD4 Major GC \u66F4\u9891\u7E41\uFF0C\u56DE\u6536\u901F\u5EA6\u4E5F\u66F4\u5FEB\u3002</p><p>\u901A\u8FC7 Minor GC \u4E4B\u540E\uFF0CEden \u4F1A\u88AB\u6E05\u7A7A\uFF0CEden \u533A\u4E2D\u7EDD\u5927\u90E8\u5206\u5BF9\u8C61\u4F1A\u88AB\u56DE\u6536\uFF0C\u800C\u90A3\u4E9B\u65E0\u9700\u56DE\u6536\u7684\u5B58\u6D3B\u5BF9\u8C61\uFF0C\u5C06\u4F1A\u8FDB\u5230 Survivor \u7684 From \u533A\uFF08\u82E5 From \u533A\u4E0D\u591F\uFF0C\u5219\u76F4\u63A5\u8FDB\u5165 Old \u533A\uFF09\u3002</p><p>Survivor \u533A\u76F8\u5F53\u4E8E\u662F Eden \u533A\u548C Old \u533A\u7684\u4E00\u4E2A\u7F13\u51B2\uFF0C\u7C7B\u4F3C\u4E8E\u6211\u4EEC\u4EA4\u901A\u706F\u4E2D\u7684\u9EC4\u706F\u3002Survivor \u53C8\u5206\u4E3A 2 \u4E2A\u533A\uFF0C\u4E00\u4E2A\u662F From \u533A\uFF0C\u4E00\u4E2A\u662F To \u533A\u3002\u6BCF\u6B21\u6267\u884C Minor GC\uFF0C\u4F1A\u5C06 Eden \u533A\u548C From \u5B58\u6D3B\u7684\u5BF9\u8C61\u653E\u5230 Survivor \u7684 To \u533A\uFF08\u5982\u679C To \u533A\u4E0D\u591F\uFF0C\u5219\u76F4\u63A5\u8FDB\u5165 Old \u533A\uFF09\u3002</p><p>\u4E4B\u6240\u4EE5\u6709 Survivor \u533A\u662F\u56E0\u4E3A\u5982\u679C\u6CA1\u6709 Survivor \u533A\uFF0CEden \u533A\u6BCF\u8FDB\u884C\u4E00\u6B21 Minor GC\uFF0C\u5B58\u6D3B\u7684\u5BF9\u8C61\u5C31\u4F1A\u88AB\u9001\u5230\u8001\u5E74\u4EE3\uFF0C\u8001\u5E74\u4EE3\u5F88\u5FEB\u5C31\u4F1A\u88AB\u586B\u6EE1\u3002\u800C\u6709\u5F88\u591A\u5BF9\u8C61\u867D\u7136\u4E00\u6B21 Minor GC \u6CA1\u6709\u6D88\u706D\uFF0C\u4F46\u5176\u5B9E\u4E5F\u5E76\u4E0D\u4F1A\u8E66\u8DF6\u591A\u4E45\uFF0C\u6216\u8BB8\u7B2C\u4E8C\u6B21\uFF0C\u7B2C\u4E09\u6B21\u5C31\u9700\u8981\u88AB\u6E05\u9664\u3002\u8FD9\u65F6\u5019\u79FB\u5165\u8001\u5E74\u533A\uFF0C\u5F88\u660E\u663E\u4E0D\u662F\u4E00\u4E2A\u660E\u667A\u7684\u51B3\u5B9A\u3002</p><p>\u6240\u4EE5\uFF0CSurvivor \u7684\u5B58\u5728\u610F\u4E49\u5C31\u662F\u51CF\u5C11\u88AB\u9001\u5230\u8001\u5E74\u4EE3\u7684\u5BF9\u8C61\uFF0C\u8FDB\u800C\u51CF\u5C11 Major GC \u7684\u53D1\u751F\u3002Survivor \u7684\u9884\u7B5B\u9009\u4FDD\u8BC1\uFF0C\u53EA\u6709\u7ECF\u5386 16 \u6B21 Minor GC \u8FD8\u80FD\u5728\u65B0\u751F\u4EE3\u4E2D\u5B58\u6D3B\u7684\u5BF9\u8C61\uFF0C\u624D\u4F1A\u88AB\u9001\u5230\u8001\u5E74\u4EE3\u3002</p><p>\u8BBE\u7F6E\u4E24\u4E2A Survivor \u533A\u6700\u5927\u7684\u597D\u5904\u5C31\u662F\u89E3\u51B3\u5185\u5B58\u788E\u7247\u5316\u3002</p><p>\u6211\u4EEC\u5148\u5047\u8BBE\u4E00\u4E0B\uFF0CSurvivor \u5982\u679C\u53EA\u6709\u4E00\u4E2A\u533A\u57DF\u4F1A\u600E\u6837\u3002Minor GC \u6267\u884C\u540E\uFF0CEden \u533A\u88AB\u6E05\u7A7A\u4E86\uFF0C\u5B58\u6D3B\u7684\u5BF9\u8C61\u653E\u5230\u4E86 Survivor \u533A\uFF0C\u800C\u4E4B\u524D Survivor \u533A\u4E2D\u7684\u5BF9\u8C61\uFF0C\u53EF\u80FD\u4E5F\u6709\u4E00\u4E9B\u662F\u9700\u8981\u88AB\u6E05\u9664\u7684\u3002\u95EE\u9898\u6765\u4E86\uFF0C\u8FD9\u65F6\u5019\u6211\u4EEC\u600E\u4E48\u6E05\u9664\u5B83\u4EEC\uFF1F\u5728\u8FD9\u79CD\u573A\u666F\u4E0B\uFF0C\u6211\u4EEC\u53EA\u80FD\u6807\u8BB0\u6E05\u9664\uFF0C\u800C\u6211\u4EEC\u77E5\u9053\u6807\u8BB0\u6E05\u9664\u6700\u5927\u7684\u95EE\u9898\u5C31\u662F\u5185\u5B58\u788E\u7247\uFF0C\u5728\u65B0\u751F\u4EE3\u8FD9\u79CD\u7ECF\u5E38\u4F1A\u6D88\u4EA1\u7684\u533A\u57DF\uFF0C\u91C7\u7528\u6807\u8BB0\u6E05\u9664\u5FC5\u7136\u4F1A\u8BA9\u5185\u5B58\u4EA7\u751F\u4E25\u91CD\u7684\u788E\u7247\u5316\u3002\u56E0\u4E3A Survivor \u6709 2 \u4E2A\u533A\u57DF\uFF0C\u6240\u4EE5\u6BCF\u6B21 Minor GC\uFF0C\u4F1A\u5C06\u4E4B\u524D Eden \u533A\u548C From \u533A\u4E2D\u7684\u5B58\u6D3B\u5BF9\u8C61\u590D\u5236\u5230 To \u533A\u57DF\u3002\u7B2C\u4E8C\u6B21 Minor GC \u65F6\uFF0CFrom \u4E0E To \u804C\u8D23\u4E92\u6362\uFF0C\u8FD9\u65F6\u5019\u4F1A\u5C06 Eden \u533A\u548C To \u533A\u4E2D\u7684\u5B58\u6D3B\u5BF9\u8C61\u518D\u590D\u5236\u5230 From \u533A\u57DF\uFF0C\u4EE5\u6B64\u53CD\u590D\u3002</p><p>\u8FD9\u79CD\u673A\u5236\u6700\u5927\u7684\u597D\u5904\u5C31\u662F\uFF0C\u6574\u4E2A\u8FC7\u7A0B\u4E2D\uFF0C\u6C38\u8FDC\u6709\u4E00\u4E2A Survivor space \u662F\u7A7A\u7684\uFF0C\u53E6\u4E00\u4E2A\u975E\u7A7A\u7684 Survivor space \u662F\u65E0\u788E\u7247\u7684\u3002\u90A3\u4E48\uFF0CSurvivor \u4E3A\u4EC0\u4E48\u4E0D\u5206\u66F4\u591A\u5757\u5462\uFF1F\u6BD4\u65B9\u8BF4\u5206\u6210\u4E09\u4E2A\u3001\u56DB\u4E2A\u3001\u4E94\u4E2A?\u663E\u7136\uFF0C\u5982\u679C Survivor \u533A\u518D\u7EC6\u5206\u4E0B\u53BB\uFF0C\u6BCF\u4E00\u5757\u7684\u7A7A\u95F4\u5C31\u4F1A\u6BD4\u8F83\u5C0F\uFF0C\u5BB9\u6613\u5BFC\u81F4 Survivor \u533A\u6EE1\uFF0C\u4E24\u5757 Survivor \u533A\u53EF\u80FD\u662F\u7ECF\u8FC7\u6743\u8861\u4E4B\u540E\u7684\u6700\u4F73\u65B9\u6848\u3002</p><p>\u8001\u5E74\u4EE3\u5360\u636E\u7740 2/3 \u7684\u5806\u5185\u5B58\u7A7A\u95F4\uFF0C\u53EA\u6709\u5728 Major GC \u7684\u65F6\u5019\u624D\u4F1A\u8FDB\u884C\u6E05\u7406\uFF0C\u6BCF\u6B21 GC \u90FD\u4F1A\u89E6\u53D1\u201CStop-The-World\u201D\u3002\u5185\u5B58\u8D8A\u5927\uFF0CSTW \u7684\u65F6\u95F4\u4E5F\u8D8A\u957F\uFF0C\u6240\u4EE5\u5185\u5B58\u4E5F\u4E0D\u4EC5\u4EC5\u662F\u8D8A\u5927\u5C31\u8D8A\u597D\u3002\u5728\u5185\u5B58\u62C5\u4FDD\u673A\u5236\u4E0B\uFF0C\u65E0\u6CD5\u5B89\u7F6E\u7684\u5BF9\u8C61\u4F1A\u76F4\u63A5\u8FDB\u5230\u8001\u5E74\u4EE3\uFF0C\u4EE5\u4E0B\u51E0\u79CD\u60C5\u51B5\u4E5F\u4F1A\u8FDB\u5165\u8001\u5E74\u4EE3\u3002</p><p>1\uFF09<strong>\u5927\u5BF9\u8C61</strong>\uFF0C\u6307\u9700\u8981\u5927\u91CF\u8FDE\u7EED\u5185\u5B58\u7A7A\u95F4\u7684\u5BF9\u8C61\uFF0C\u8FD9\u90E8\u5206\u5BF9\u8C61\u4E0D\u7BA1\u662F\u4E0D\u662F\u201C\u671D\u751F\u5915\u6B7B\u201D\uFF0C\u90FD\u4F1A\u76F4\u63A5\u8FDB\u5230\u8001\u5E74\u4EE3\u3002\u8FD9\u6837\u505A\u4E3B\u8981\u662F\u4E3A\u4E86\u907F\u514D\u5728 Eden \u533A\u53CA 2 \u4E2A Survivor \u533A\u4E4B\u95F4\u53D1\u751F\u5927\u91CF\u7684\u5185\u5B58\u590D\u5236\u3002</p><p>2\uFF09<strong>\u957F\u671F\u5B58\u6D3B\u5BF9\u8C61</strong>\uFF0C\u865A\u62DF\u673A\u7ED9\u6BCF\u4E2A\u5BF9\u8C61\u5B9A\u4E49\u4E86\u4E00\u4E2A\u5BF9\u8C61\u5E74\u9F84\uFF08Age\uFF09\u8BA1\u6570\u5668\u3002\u6B63\u5E38\u60C5\u51B5\u4E0B\u5BF9\u8C61\u4F1A\u4E0D\u65AD\u7684\u5728 Survivor \u7684 From \u533A\u4E0E To \u533A\u4E4B\u95F4\u79FB\u52A8\uFF0C\u5BF9\u8C61\u5728 Survivor \u533A\u4E2D\u6BCF\u7ECF\u5386\u4E00\u6B21 Minor GC\uFF0C\u5E74\u9F84\u5C31\u589E\u52A0 1 \u5C81\u3002\u5F53\u5E74\u9F84\u589E\u52A0\u5230 15 \u5C81\u65F6\uFF0C\u8FD9\u65F6\u5019\u5C31\u4F1A\u88AB\u8F6C\u79FB\u5230\u8001\u5E74\u4EE3\u3002\u5F53\u7136\uFF0C\u8FD9\u91CC\u7684 15\uFF0CJVM \u4E5F\u652F\u6301\u8FDB\u884C\u7279\u6B8A\u8BBE\u7F6E\u3002</p><p>3\uFF09<strong>\u52A8\u6001\u5BF9\u8C61\u5E74\u9F84</strong>\uFF0C\u865A\u62DF\u673A\u5E76\u4E0D\u91CD\u89C6\u8981\u6C42\u5BF9\u8C61\u5E74\u9F84\u5FC5\u987B\u5230 15 \u5C81\uFF0C\u624D\u4F1A\u653E\u5165\u8001\u5E74\u533A\uFF0C\u5982\u679C Survivor \u7A7A\u95F4\u4E2D\u76F8\u540C\u5E74\u9F84\u6240\u6709\u5BF9\u8C61\u5927\u5C0F\u7684\u603B\u5408\u5927\u4E8E Survivor \u7A7A\u95F4\u7684\u4E00\u534A\uFF0C\u5E74\u9F84\u5927\u4E8E\u7B49\u4E8E\u8BE5\u5E74\u9F84\u7684\u5BF9\u8C61\u5C31\u53EF\u4EE5\u76F4\u63A5\u8FDB\u53BB\u8001\u5E74\u533A\uFF0C\u65E0\u9700\u7B49\u4F60\u201C\u6210\u5E74\u201D\u3002</p><p>\u8FD9\u5176\u5B9E\u6709\u70B9\u7C7B\u4F3C\u4E8E\u8D1F\u8F7D\u5747\u8861\uFF0C\u8F6E\u8BE2\u662F\u8D1F\u8F7D\u5747\u8861\u7684\u4E00\u79CD\uFF0C\u4FDD\u8BC1\u6BCF\u53F0\u673A\u5668\u90FD\u5206\u5F97\u540C\u6837\u7684\u8BF7\u6C42\u3002\u770B\u4F3C\u5F88\u5747\u8861\uFF0C\u4F46\u6BCF\u53F0\u673A\u7684\u786C\u4EF6\u4E0D\u901A\uFF0C\u5065\u5EB7\u72B6\u51B5\u4E0D\u540C\uFF0C\u6211\u4EEC\u8FD8\u53EF\u4EE5\u57FA\u4E8E\u6BCF\u53F0\u673A\u63A5\u53D7\u7684\u8BF7\u6C42\u6570\uFF0C\u6216\u6BCF\u53F0\u673A\u7684\u54CD\u5E94\u65F6\u95F4\u7B49\uFF0C\u6765\u8C03\u6574\u6211\u4EEC\u7684\u8D1F\u8F7D\u5747\u8861\u7B97\u6CD5\u3002</p><hr>',62),m=r("\u53C2\u8003\u94FE\u63A5\uFF1A"),d={href:"https://mp.weixin.qq.com/s/RQGImK3-SrvJfs8eYCiv4A",target:"_blank",rel:"noopener noreferrer"},j=r("https://mp.weixin.qq.com/s/RQGImK3-SrvJfs8eYCiv4A"),s=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png",alt:""})],-1);function g(u,S){const t=o("ExternalLinkIcon");return p(),v("div",null,[b,e("p",null,[m,e("a",d,[j,c(t)])]),s])}var C=a(n,[["render",g],["__file","tujie-gc.html.vue"]]);export{C as default};
+import{_ as a}from"./plugin-vue_export-helper.21dcd24c.js";import{r as o,o as p,c as v,a as e,b as c,e as i,d as r}from"./app.615e41d8.js";const n={},b=i('<h1 id="\u56FE\u89E3java\u7684\u5783\u573E\u56DE\u6536\u673A\u5236" tabindex="-1"><a class="header-anchor" href="#\u56FE\u89E3java\u7684\u5783\u573E\u56DE\u6536\u673A\u5236" aria-hidden="true">#</a> \u56FE\u89E3Java\u7684\u5783\u573E\u56DE\u6536\u673A\u5236</h1><p>\u5783\u573E\u56DE\u6536\u662F\u4E00\u79CD\u5728\u5806\u5185\u5B58\u4E2D\u627E\u51FA\u54EA\u4E9B\u5BF9\u8C61\u5728\u88AB\u4F7F\u7528\uFF0C\u8FD8\u6709\u54EA\u4E9B\u5BF9\u8C61\u6CA1\u88AB\u4F7F\u7528\uFF0C\u5E76\u4E14\u5C06\u540E\u8005\u56DE\u6536\u6389\u7684\u673A\u5236\u3002</p><p>\u6240\u8C13\u4F7F\u7528\u4E2D\u7684\u5BF9\u8C61\uFF0C\u6307\u7684\u662F\u7A0B\u5E8F\u4E2D\u8FD8\u6709\u5F15\u7528\u7684\u5BF9\u8C61\uFF1B\u800C\u672A\u4F7F\u7528\u4E2D\u7684\u5BF9\u8C61\uFF0C\u6307\u7684\u662F\u7A0B\u5E8F\u4E2D\u5DF2\u7ECF\u6CA1\u6709\u5F15\u7528\u7684\u5BF9\u8C61\uFF0C\u8BE5\u5BF9\u8C61\u5360\u7528\u7684\u5185\u5B58\u4E5F\u53EF\u4EE5\u88AB\u56DE\u6536\u6389\u3002</p><p>Java \u8BED\u8A00\u51FA\u6765\u4E4B\u524D\uFF0C\u5927\u5BB6\u90FD\u5728\u62FC\u547D\u7684\u5199 C \u6216\u8005 C++ \u7684\u7A0B\u5E8F\uFF0C\u6B64\u65F6\u5B58\u5728\u4E00\u4E2A\u5F88\u5927\u7684\u77DB\u76FE\uFF0CC++ \u7B49\u8BED\u8A00\u521B\u5EFA\u5BF9\u8C61\u9700\u8981\u4E0D\u65AD\u7684\u53BB\u5F00\u8F9F\u7A7A\u95F4\uFF0C\u4E0D\u7528\u7684\u65F6\u5019\u53C8\u9700\u8981\u4E0D\u65AD\u7684\u53BB\u91CA\u653E\u7A7A\u95F4\uFF0C\u65E2\u8981\u5199\u6784\u9020\u51FD\u6570\uFF0C\u53C8\u8981\u5199\u6790\u6784\u51FD\u6570\uFF0C\u5F88\u591A\u65F6\u5019\u90FD\u5728\u91CD\u590D\u7684 allocated\uFF0C\u7136\u540E\u4E0D\u505C\u7684\u6790\u6784\u3002\u800C Java \u4E0D\u4E00\u6837\uFF0C\u5B83\u6709\u5783\u573E\u56DE\u6536\u5668\uFF0C\u91CA\u653E\u5185\u5B58\u7531\u56DE\u6536\u5668\u8D1F\u8D23\u3002</p><p>\u5783\u573E\u56DE\u6536\u7684\u7B2C\u4E00\u6B65\u662F\u6807\u8BB0\u3002\u5783\u573E\u56DE\u6536\u5668\u6B64\u65F6\u4F1A\u627E\u51FA\u5185\u5B58\u54EA\u4E9B\u5728\u4F7F\u7528\u4E2D\uFF0C\u54EA\u4E9B\u4E0D\u662F\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/tujie-gc-9858785a-c6aa-4d6d-a6cd-640d24dd27d0.png" alt=""></p><p>\u4E0A\u56FE\u4E2D\uFF0C\u84DD\u8272\u8868\u793A\u5DF2\u5F15\u7528\u5BF9\u8C61\uFF0C\u6A59\u8272\u8868\u793A\u672A\u5F15\u7528\u5BF9\u8C61\u3002\u5783\u573E\u56DE\u6536\u5668\u8981\u68C0\u67E5\u5B8C\u6240\u6709\u7684\u5BF9\u8C61\uFF0C\u624D\u80FD\u77E5\u9053\u54EA\u4E9B\u6709\u88AB\u5F15\u7528\uFF0C\u54EA\u4E9B\u6CA1\u3002\u5982\u679C\u7CFB\u7EDF\u91CC\u6240\u6709\u7684\u5BF9\u8C61\u90FD\u8981\u68C0\u67E5\uFF0C\u90A3\u8FD9\u4E00\u6B65\u53EF\u80FD\u4F1A\u76F8\u5F53\u8017\u65F6\u95F4\u3002</p><p>\u5783\u573E\u56DE\u6536\u7684\u7B2C\u4E8C\u6B65\u662F\u6E05\u9664\uFF0C\u8FD9\u4E00\u6B65\u4F1A\u5220\u6389\u6807\u8BB0\u51FA\u7684\u672A\u5F15\u7528\u5BF9\u8C61\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/tujie-gc-768f5a2c-6c81-4f76-b847-a41cc8413228.png" alt=""></p><p>\u5185\u5B58\u5206\u914D\u5668\u4F1A\u4FDD\u7559\u6307\u5411\u53EF\u7528\u5185\u5B58\u4E2D\u7684\u5F15\u7528\uFF0C\u4EE5\u5206\u914D\u7ED9\u65B0\u7684\u5BF9\u8C61\u3002</p><p>\u5783\u573E\u56DE\u6536\u7684\u7B2C\u4E09\u6B65\u662F\u538B\u7F29\uFF0C\u4E3A\u4E86\u63D0\u5347\u6027\u80FD\uFF0C\u5220\u9664\u4E86\u672A\u5F15\u7528\u5BF9\u8C61\u540E\uFF0C\u8FD8\u53EF\u4EE5\u5C06\u5269\u4E0B\u7684\u5DF2\u5F15\u7528\u5BF9\u8C61\u653E\u5728\u4E00\u8D77\uFF08\u538B\u7F29\uFF09\uFF0C\u8FD9\u6837\u5C31\u80FD\u66F4\u7B80\u5355\u5FEB\u6377\u5730\u5206\u914D\u65B0\u5BF9\u8C61\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/tujie-gc-989889b6-adb4-4277-8c67-73d76658f744.png" alt=""></p><p>\u4E4B\u524D\u63D0\u5230\u8FC7\uFF0C\u9010\u4E00\u6807\u8BB0\u548C\u538B\u7F29 \xA0Java \u865A\u62DF\u673A\u4E2D\u7684\u6240\u6709\u5BF9\u8C61\u975E\u5E38\u4F4E\u6548\uFF1A\u5206\u914D\u7684\u5BF9\u8C61\u8D8A\u591A\uFF0C\u5783\u573E\u56DE\u6536\u9700\u8981\u7684\u65F6\u95F4\u5C31\u8D8A\u4E45\u3002\u4E0D\u8FC7\uFF0C\u6839\u636E\u7EDF\u8BA1\uFF0C\u5927\u90E8\u5206\u7684\u5BF9\u8C61\uFF0C\u5176\u5B9E\u7528\u6CA1\u591A\u4E45\u5C31\u4E0D\u7528\u4E86\u3002</p><p>\u6765\u770B\u4E2A\u4F8B\u5B50\u5427\u3002\u4E0B\u56FE\u4E2D\uFF0C\u7AD6\u8F74\u4EE3\u8868\u5DF2\u5206\u914D\u7684\u5B57\u8282\uFF0C\u800C\u6A2A\u8F74\u4EE3\u8868\u7A0B\u5E8F\u7684\u8FD0\u884C\u65F6\u95F4\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/tujie-gc-24b154be-4ad0-4cc7-87e9-a3035bc9e3c5.png" alt=""></p><p>\u53EF\u89C1\uFF0C\u5B58\u6D3B\uFF08\u6CA1\u88AB\u91CA\u653E\uFF09\u7684\u5BF9\u8C61\u968F\u7740\u8FD0\u884C\u65F6\u95F4\u8D8A\u6765\u8D8A\u5C11\u3002\u56FE\u4E2D\u5DE6\u4FA7\u7684\u5CF0\u503C\uFF0C\u4E5F\u8868\u660E\u4E86\u5927\u90E8\u5206\u5BF9\u8C61\u5176\u5B9E\u90FD\u633A\u77ED\u547D\u7684\u3002</p><p>\u5230\u8FD9\uFF0C\u8FD9\u7BC7\u5185\u5BB9\u5C31\u5206\u4E3A\u4E24\u90E8\u5206\u4E86\uFF0C\u4E00\u90E8\u5206\u662F\u56FD\u5916\u5927\u795E\u7684\u8BB2\u89E3\uFF0C\u4E00\u90E8\u5206\u662F\u963F\u91CC\u5927\u795E\u7684\u8BB2\u89E3\u3002\u5148\u6765\u770B\u56FD\u5916\u5927\u795E\u7684\u3002</p><hr><p>\u6839\u636E\u4E4B\u524D\u7684\u89C4\u5F8B\uFF0C\u5C31\u53EF\u4EE5\u7528\u6765\u63D0\u5347 JVM \u7684\u6548\u7387\u4E86\u3002\u65B9\u6CD5\u662F\uFF0C\u628A\u5806\u5206\u6210\u51E0\u4E2A\u90E8\u5206\uFF08\u5C31\u662F\u6240\u8C13\u7684\u5206\u4EE3\uFF09\uFF0C\u5206\u522B\u662F\u65B0\u751F\u4EE3\u3001\u8001\u5E74\u4EE3\uFF0C\u4EE5\u53CA\u6C38\u751F\u4EE3\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/tujie-gc-590c5011-48c4-4543-bd26-6f14c2b8614b.png" alt=""></p><p>\u65B0\u5BF9\u8C61\u4F1A\u88AB\u5206\u914D\u5728\u65B0\u751F\u4EE3\u5185\u5B58\u3002\u4E00\u65E6\u65B0\u751F\u4EE3\u5185\u5B58\u6EE1\u4E86\uFF0C\u5C31\u4F1A\u5F00\u59CB\u5BF9\u6B7B\u6389\u7684\u5BF9\u8C61\uFF0C\u8FDB\u884C\u6240\u8C13\u7684\u5C0F\u578B\u5783\u573E\u56DE\u6536\uFF08Minor GC\uFF09\u8FC7\u7A0B\u3002\u4E00\u7247\u65B0\u751F\u4EE3\u5185\u5B58\u91CC\uFF0C\u6B7B\u6389\u7684\u8D8A\u591A\uFF0C\u56DE\u6536\u8FC7\u7A0B\u5C31\u8D8A\u5FEB\uFF1B\u81F3\u4E8E\u90A3\u4E9B\u8FD8\u6D3B\u7740\u7684\u5BF9\u8C61\uFF0C\u6B64\u65F6\u5C31\u4F1A\u8001\u5316\uFF0C\u5E76\u6700\u7EC8\u8001\u5230\u8FDB\u5165\u8001\u5E74\u4EE3\u5185\u5B58\u3002</p><p>Stop the World \u4E8B\u4EF6 \u2014\u2014 \u5C0F\u578B\u5783\u573E\u56DE\u6536\u5C5E\u4E8E\u4E00\u79CD\u53EB &quot;Stop the World&quot; \u7684\u4E8B\u4EF6\u3002\u5728\u8FD9\u79CD\u4E8B\u4EF6\u53D1\u751F\u65F6\uFF0C\u6240\u6709\u7684\u7A0B\u5E8F\u7EBF\u7A0B\u90FD\u8981\u6682\u505C\uFF0C\u76F4\u5230\u4E8B\u4EF6\u5B8C\u6210\uFF08\u6BD4\u5982\u8FD9\u91CC\u5C31\u662F\u5B8C\u6210\u4E86\u6240\u6709\u56DE\u6536\u5DE5\u4F5C\uFF09\u4E3A\u6B62\u3002</p><p>\u8001\u5E74\u4EE3\u7528\u6765\u4FDD\u5B58\u957F\u65F6\u95F4\u5B58\u6D3B\u7684\u5BF9\u8C61\u3002\u901A\u5E38\uFF0C\u8BBE\u7F6E\u4E00\u4E2A\u9608\u503C\uFF0C\u5F53\u8FBE\u5230\u8BE5\u5E74\u9F84\u65F6\uFF0C\u5E74\u8F7B\u4EE3\u5BF9\u8C61\u4F1A\u88AB\u79FB\u52A8\u5230\u8001\u5E74\u4EE3\u3002\u6700\u7EC8\u8001\u5E74\u4EE3\u4E5F\u4F1A\u88AB\u56DE\u6536\u3002\u8FD9\u4E2A\u4E8B\u4EF6\u4E3A Major GC\u3002</p><p>Major GC \u4E5F\u4F1A\u89E6\u53D1STW\uFF08Stop the World\uFF09\u3002\u901A\u5E38\uFF0CMajor GC\u4F1A\u6162\u5F88\u591A\uFF0C\u56E0\u4E3A\u5B83\u6D89\u53CA\u5230\u6240\u6709\u5B58\u6D3B\u5BF9\u8C61\u3002\u6240\u4EE5\uFF0C\u5BF9\u4E8E\u54CD\u5E94\u6027\u7684\u5E94\u7528\u7A0B\u5E8F\uFF0C\u5E94\u8BE5\u5C3D\u91CF\u907F\u514DMajor GC\u3002\u8FD8\u8981\u6CE8\u610F\uFF0CMajor GC\u7684STW\u7684\u65F6\u957F\u53D7\u5E74\u8001\u4EE3\u5783\u573E\u56DE\u6536\u5668\u7C7B\u578B\u7684\u5F71\u54CD\u3002</p><p>\u6C38\u4E45\u4EE3\u5305\u542BJVM\u7528\u4E8E\u63CF\u8FF0\u5E94\u7528\u7A0B\u5E8F\u4E2D\u7C7B\u548C\u65B9\u6CD5\u7684\u5143\u6570\u636E\u3002\u6C38\u4E45\u4EE3\u662F\u7531JVM\u5728\u8FD0\u884C\u65F6\u6839\u636E\u5E94\u7528\u7A0B\u5E8F\u4F7F\u7528\u7684\u7C7B\u6765\u586B\u5145\u7684\u3002\u6B64\u5916\uFF0CJava SE\u7C7B\u5E93\u548C\u65B9\u6CD5\u4E5F\u5B58\u50A8\u5728\u8FD9\u91CC\u3002</p><p>\u5982\u679CJVM\u53D1\u73B0\u67D0\u4E9B\u7C7B\u4E0D\u518D\u9700\u8981\uFF0C\u5E76\u4E14\u5176\u4ED6\u7C7B\u53EF\u80FD\u9700\u8981\u7A7A\u95F4\uFF0C\u5219\u8FD9\u4E9B\u7C7B\u53EF\u80FD\u4F1A\u88AB\u56DE\u6536\u3002</p><p>\u9996\u5148\uFF0C\u5C06\u4EFB\u4F55\u65B0\u5BF9\u8C61\u5206\u914D\u7ED9 eden \u7A7A\u95F4\u3002 \u4E24\u4E2A survivor\xA0\u7A7A\u95F4\u90FD\u662F\u7A7A\u7684\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/tujie-gc-efe9657b-c7a6-48a8-9037-0e709b1d236c.jpg" alt=""></p><p>\u5F53 eden\xA0\u7A7A\u95F4\u586B\u6EE1\u65F6\uFF0C\u4F1A\u89E6\u53D1\u8F7B\u5FAE\u7684\u5783\u573E\u6536\u96C6\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/tujie-gc-2497947b-92b5-4a7c-9399-1909a3153660.jpg" alt=""></p><p>\u5F15\u7528\u7684\u5BF9\u8C61\u88AB\u79FB\u52A8\u5230\u7B2C\u4E00\u4E2A survivor\xA0\u7A7A\u95F4\u3002 \u6E05\u9664\xA0eden\xA0\u7A7A\u95F4\u65F6\uFF0C\u5C06\u5220\u9664\u672A\u5F15\u7528\u7684\u5BF9\u8C61\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/tujie-gc-2b431315-26fa-4ea0-843a-c63ca568f960.jpg" alt=""></p><p>\u5728\u4E0B\u4E00\u6B21Minor GC\u4E2D\uFF0CEden\u533A\u4E5F\u4F1A\u505A\u540C\u6837\u7684\u64CD\u4F5C\u3002\u5220\u9664\u672A\u88AB\u5F15\u7528\u7684\u5BF9\u8C61\uFF0C\u5E76\u5C06\u88AB\u5F15\u7528\u7684\u5BF9\u8C61\u79FB\u52A8\u5230Survivor\u533A\u3002\u7136\u800C\uFF0C\u8FD9\u91CC\uFF0C\u4ED6\u4EEC\u88AB\u79FB\u52A8\u5230\u4E86\u7B2C\u4E8C\u4E2ASurvivor\u533A\uFF08S1\uFF09\u3002</p><p>\u6B64\u5916\uFF0C\u7B2C\u4E00\u4E2ASurvivor\u533A\uFF08S0\uFF09\u4E2D\uFF0C\u5728\u4E0A\u4E00\u6B21Minor GC\u5E78\u5B58\u7684\u5BF9\u8C61\uFF0C\u4F1A\u589E\u52A0\u5E74\u9F84\uFF0C\u5E76\u88AB\u79FB\u52A8\u5230S1\u4E2D\u3002\u5F85\u6240\u6709\u5E78\u5B58\u5BF9\u8C61\u90FD\u88AB\u79FB\u52A8\u5230S1\u540E\uFF0CS0\u548CEden\u533A\u90FD\u4F1A\u88AB\u6E05\u7A7A\u3002\u6CE8\u610F\uFF0CSurvivor\u533A\u4E2D\u6709\u4E86\u4E0D\u540C\u5E74\u9F84\u7684\u5BF9\u8C61\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/tujie-gc-e2560f59-9b24-4d16-88db-b6ac4d0b6ffe.jpg" alt=""></p><p>\u5728\u4E0B\u4E00\u6B21Minor GC\u4E2D\uFF0C\u4F1A\u91CD\u590D\u540C\u6837\u7684\u64CD\u4F5C\u3002\u4E0D\u8FC7\uFF0C\u8FD9\u4E00\u6B21Survivor\u533A\u4F1A\u4EA4\u6362\u3002\u88AB\u5F15\u7528\u7684\u5BF9\u8C61\u79FB\u52A8\u5230S0,\u3002\u5E78\u5B58\u7684\u5BF9\u8C61\u589E\u52A0\u5E74\u9F84\u3002Eden\u533A\u548CS1\u88AB\u6E05\u7A7A\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/tujie-gc-aa9f883a-12db-4c8b-8391-3c289b53d804.jpg" alt=""></p><p>\u6B64\u5E7B\u706F\u7247\u6F14\u793A\u4E86 promotion\u3002 \u5728\u8F83\u5C0F\u7684GC\u4E4B\u540E\uFF0C\u5F53\u8001\u5316\u7684\u7269\u4F53\u8FBE\u5230\u4E00\u5B9A\u7684\u5E74\u9F84\u9608\u503C\uFF08\u5728\u8BE5\u793A\u4F8B\u4E2D\u4E3A8\uFF09\u65F6\uFF0C\u5B83\u4EEC\u4ECE\u5E74\u8F7B\u4E00\u4EE3\u664B\u5347\u5230\u8001\u4E00\u4EE3\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/tujie-gc-dec96816-2912-4127-aaaa-a4d987123f52.jpg" alt=""></p><p>\u968F\u7740\u8F83\u5C0F\u7684GC\u6301\u7EED\u53D1\u751F\uFF0C\u7269\u4F53\u5C06\u7EE7\u7EED\u88AB\u63A8\u5E7F\u5230\u8001\u4E00\u4EE3\u7A7A\u95F4\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/tujie-gc-6cb31f8a-2eac-489c-88bd-fc643996ab49.jpg" alt=""></p><p>\u6240\u4EE5\u8FD9\u51E0\u4E4E\u6DB5\u76D6\u4E86\u5E74\u8F7B\u4E00\u4EE3\u7684\u6574\u4E2A\u8FC7\u7A0B\u3002 \u6700\u7EC8\uFF0C\u5C06\u4E3B\u8981\u5BF9\u8001\u4E00\u4EE3\u8FDB\u884CGC\uFF0C\u6E05\u7406\u5E76\u6700\u7EC8\u538B\u7F29\u8BE5\u7A7A\u95F4\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/tujie-gc-df98a004-e233-4fb5-a31a-f422033ecfa7.jpg" alt=""></p><hr><p>\u63A5\u4E0B\u6765\uFF0C\u770B\u963F\u91CC\u5927\u795E\u7684\u7248\u672C\u3002</p><p>Java \u5806\uFF08Java Heap\uFF09\u662F JVM \u6240\u7BA1\u7406\u7684\u5185\u5B58\u4E2D\u6700\u5927\u7684\u4E00\u5757\uFF0C\u5806\u53C8\u662F\u5783\u573E\u6536\u96C6\u5668\u7BA1\u7406\u7684\u4E3B\u8981\u533A\u57DF\uFF0C\u8FD9\u91CC\u6211\u4EEC\u4E3B\u8981\u5206\u6790\u4E00\u4E0B Java \u5806\u7684\u7ED3\u6784\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/tujie-gc-294701a5-1c50-4112-94a1-96a8bab80e34.png" alt=""></p><p>Java \u5806\u4E3B\u8981\u5206\u4E3A 2 \u4E2A\u533A\u57DF-\u5E74\u8F7B\u4EE3\u4E0E\u8001\u5E74\u4EE3\uFF0C\u5176\u4E2D\u5E74\u8F7B\u4EE3\u53C8\u5206 Eden \u533A\u548C Survivor \u533A\uFF0C\u5176\u4E2D Survivor \u533A\u53C8\u5206 From \u548C To 2 \u4E2A\u533A\u3002\u53EF\u80FD\u8FD9\u65F6\u5019\u5927\u5BB6\u4F1A\u6709\u7591\u95EE\uFF0C\u4E3A\u4EC0\u4E48\u9700\u8981 Survivor \u533A\uFF0C\u4E3A\u4EC0\u4E48 Survivor \u8FD8\u8981\u5206 2 \u4E2A\u533A\u3002</p><p>\u5927\u591A\u6570\u60C5\u51B5\u4E0B\uFF0C\u5BF9\u8C61\u4F1A\u5728\u65B0\u751F\u4EE3 Eden \u533A\u4E2D\u8FDB\u884C\u5206\u914D\u3002\u5F53 Eden \u533A\u6CA1\u6709\u8DB3\u591F\u7A7A\u95F4\u8FDB\u884C\u5206\u914D\u65F6\uFF0C\u865A\u62DF\u673A\u4F1A\u53D1\u8D77\u4E00\u6B21 Minor GC\uFF0CMinor GC \u76F8\u6BD4 Major GC \u66F4\u9891\u7E41\uFF0C\u56DE\u6536\u901F\u5EA6\u4E5F\u66F4\u5FEB\u3002</p><p>\u901A\u8FC7 Minor GC \u4E4B\u540E\uFF0CEden \u4F1A\u88AB\u6E05\u7A7A\uFF0CEden \u533A\u4E2D\u7EDD\u5927\u90E8\u5206\u5BF9\u8C61\u4F1A\u88AB\u56DE\u6536\uFF0C\u800C\u90A3\u4E9B\u65E0\u9700\u56DE\u6536\u7684\u5B58\u6D3B\u5BF9\u8C61\uFF0C\u5C06\u4F1A\u8FDB\u5230 Survivor \u7684 From \u533A\uFF08\u82E5 From \u533A\u4E0D\u591F\uFF0C\u5219\u76F4\u63A5\u8FDB\u5165 Old \u533A\uFF09\u3002</p><p>Survivor \u533A\u76F8\u5F53\u4E8E\u662F Eden \u533A\u548C Old \u533A\u7684\u4E00\u4E2A\u7F13\u51B2\uFF0C\u7C7B\u4F3C\u4E8E\u6211\u4EEC\u4EA4\u901A\u706F\u4E2D\u7684\u9EC4\u706F\u3002Survivor \u53C8\u5206\u4E3A 2 \u4E2A\u533A\uFF0C\u4E00\u4E2A\u662F From \u533A\uFF0C\u4E00\u4E2A\u662F To \u533A\u3002\u6BCF\u6B21\u6267\u884C Minor GC\uFF0C\u4F1A\u5C06 Eden \u533A\u548C From \u5B58\u6D3B\u7684\u5BF9\u8C61\u653E\u5230 Survivor \u7684 To \u533A\uFF08\u5982\u679C To \u533A\u4E0D\u591F\uFF0C\u5219\u76F4\u63A5\u8FDB\u5165 Old \u533A\uFF09\u3002</p><p>\u4E4B\u6240\u4EE5\u6709 Survivor \u533A\u662F\u56E0\u4E3A\u5982\u679C\u6CA1\u6709 Survivor \u533A\uFF0CEden \u533A\u6BCF\u8FDB\u884C\u4E00\u6B21 Minor GC\uFF0C\u5B58\u6D3B\u7684\u5BF9\u8C61\u5C31\u4F1A\u88AB\u9001\u5230\u8001\u5E74\u4EE3\uFF0C\u8001\u5E74\u4EE3\u5F88\u5FEB\u5C31\u4F1A\u88AB\u586B\u6EE1\u3002\u800C\u6709\u5F88\u591A\u5BF9\u8C61\u867D\u7136\u4E00\u6B21 Minor GC \u6CA1\u6709\u6D88\u706D\uFF0C\u4F46\u5176\u5B9E\u4E5F\u5E76\u4E0D\u4F1A\u8E66\u8DF6\u591A\u4E45\uFF0C\u6216\u8BB8\u7B2C\u4E8C\u6B21\uFF0C\u7B2C\u4E09\u6B21\u5C31\u9700\u8981\u88AB\u6E05\u9664\u3002\u8FD9\u65F6\u5019\u79FB\u5165\u8001\u5E74\u533A\uFF0C\u5F88\u660E\u663E\u4E0D\u662F\u4E00\u4E2A\u660E\u667A\u7684\u51B3\u5B9A\u3002</p><p>\u6240\u4EE5\uFF0CSurvivor \u7684\u5B58\u5728\u610F\u4E49\u5C31\u662F\u51CF\u5C11\u88AB\u9001\u5230\u8001\u5E74\u4EE3\u7684\u5BF9\u8C61\uFF0C\u8FDB\u800C\u51CF\u5C11 Major GC \u7684\u53D1\u751F\u3002Survivor \u7684\u9884\u7B5B\u9009\u4FDD\u8BC1\uFF0C\u53EA\u6709\u7ECF\u5386 16 \u6B21 Minor GC \u8FD8\u80FD\u5728\u65B0\u751F\u4EE3\u4E2D\u5B58\u6D3B\u7684\u5BF9\u8C61\uFF0C\u624D\u4F1A\u88AB\u9001\u5230\u8001\u5E74\u4EE3\u3002</p><p>\u8BBE\u7F6E\u4E24\u4E2A Survivor \u533A\u6700\u5927\u7684\u597D\u5904\u5C31\u662F\u89E3\u51B3\u5185\u5B58\u788E\u7247\u5316\u3002</p><p>\u6211\u4EEC\u5148\u5047\u8BBE\u4E00\u4E0B\uFF0CSurvivor \u5982\u679C\u53EA\u6709\u4E00\u4E2A\u533A\u57DF\u4F1A\u600E\u6837\u3002Minor GC \u6267\u884C\u540E\uFF0CEden \u533A\u88AB\u6E05\u7A7A\u4E86\uFF0C\u5B58\u6D3B\u7684\u5BF9\u8C61\u653E\u5230\u4E86 Survivor \u533A\uFF0C\u800C\u4E4B\u524D Survivor \u533A\u4E2D\u7684\u5BF9\u8C61\uFF0C\u53EF\u80FD\u4E5F\u6709\u4E00\u4E9B\u662F\u9700\u8981\u88AB\u6E05\u9664\u7684\u3002\u95EE\u9898\u6765\u4E86\uFF0C\u8FD9\u65F6\u5019\u6211\u4EEC\u600E\u4E48\u6E05\u9664\u5B83\u4EEC\uFF1F\u5728\u8FD9\u79CD\u573A\u666F\u4E0B\uFF0C\u6211\u4EEC\u53EA\u80FD\u6807\u8BB0\u6E05\u9664\uFF0C\u800C\u6211\u4EEC\u77E5\u9053\u6807\u8BB0\u6E05\u9664\u6700\u5927\u7684\u95EE\u9898\u5C31\u662F\u5185\u5B58\u788E\u7247\uFF0C\u5728\u65B0\u751F\u4EE3\u8FD9\u79CD\u7ECF\u5E38\u4F1A\u6D88\u4EA1\u7684\u533A\u57DF\uFF0C\u91C7\u7528\u6807\u8BB0\u6E05\u9664\u5FC5\u7136\u4F1A\u8BA9\u5185\u5B58\u4EA7\u751F\u4E25\u91CD\u7684\u788E\u7247\u5316\u3002\u56E0\u4E3A Survivor \u6709 2 \u4E2A\u533A\u57DF\uFF0C\u6240\u4EE5\u6BCF\u6B21 Minor GC\uFF0C\u4F1A\u5C06\u4E4B\u524D Eden \u533A\u548C From \u533A\u4E2D\u7684\u5B58\u6D3B\u5BF9\u8C61\u590D\u5236\u5230 To \u533A\u57DF\u3002\u7B2C\u4E8C\u6B21 Minor GC \u65F6\uFF0CFrom \u4E0E To \u804C\u8D23\u4E92\u6362\uFF0C\u8FD9\u65F6\u5019\u4F1A\u5C06 Eden \u533A\u548C To \u533A\u4E2D\u7684\u5B58\u6D3B\u5BF9\u8C61\u518D\u590D\u5236\u5230 From \u533A\u57DF\uFF0C\u4EE5\u6B64\u53CD\u590D\u3002</p><p>\u8FD9\u79CD\u673A\u5236\u6700\u5927\u7684\u597D\u5904\u5C31\u662F\uFF0C\u6574\u4E2A\u8FC7\u7A0B\u4E2D\uFF0C\u6C38\u8FDC\u6709\u4E00\u4E2A Survivor space \u662F\u7A7A\u7684\uFF0C\u53E6\u4E00\u4E2A\u975E\u7A7A\u7684 Survivor space \u662F\u65E0\u788E\u7247\u7684\u3002\u90A3\u4E48\uFF0CSurvivor \u4E3A\u4EC0\u4E48\u4E0D\u5206\u66F4\u591A\u5757\u5462\uFF1F\u6BD4\u65B9\u8BF4\u5206\u6210\u4E09\u4E2A\u3001\u56DB\u4E2A\u3001\u4E94\u4E2A?\u663E\u7136\uFF0C\u5982\u679C Survivor \u533A\u518D\u7EC6\u5206\u4E0B\u53BB\uFF0C\u6BCF\u4E00\u5757\u7684\u7A7A\u95F4\u5C31\u4F1A\u6BD4\u8F83\u5C0F\uFF0C\u5BB9\u6613\u5BFC\u81F4 Survivor \u533A\u6EE1\uFF0C\u4E24\u5757 Survivor \u533A\u53EF\u80FD\u662F\u7ECF\u8FC7\u6743\u8861\u4E4B\u540E\u7684\u6700\u4F73\u65B9\u6848\u3002</p><p>\u8001\u5E74\u4EE3\u5360\u636E\u7740 2/3 \u7684\u5806\u5185\u5B58\u7A7A\u95F4\uFF0C\u53EA\u6709\u5728 Major GC \u7684\u65F6\u5019\u624D\u4F1A\u8FDB\u884C\u6E05\u7406\uFF0C\u6BCF\u6B21 GC \u90FD\u4F1A\u89E6\u53D1\u201CStop-The-World\u201D\u3002\u5185\u5B58\u8D8A\u5927\uFF0CSTW \u7684\u65F6\u95F4\u4E5F\u8D8A\u957F\uFF0C\u6240\u4EE5\u5185\u5B58\u4E5F\u4E0D\u4EC5\u4EC5\u662F\u8D8A\u5927\u5C31\u8D8A\u597D\u3002\u5728\u5185\u5B58\u62C5\u4FDD\u673A\u5236\u4E0B\uFF0C\u65E0\u6CD5\u5B89\u7F6E\u7684\u5BF9\u8C61\u4F1A\u76F4\u63A5\u8FDB\u5230\u8001\u5E74\u4EE3\uFF0C\u4EE5\u4E0B\u51E0\u79CD\u60C5\u51B5\u4E5F\u4F1A\u8FDB\u5165\u8001\u5E74\u4EE3\u3002</p><p>1\uFF09<strong>\u5927\u5BF9\u8C61</strong>\uFF0C\u6307\u9700\u8981\u5927\u91CF\u8FDE\u7EED\u5185\u5B58\u7A7A\u95F4\u7684\u5BF9\u8C61\uFF0C\u8FD9\u90E8\u5206\u5BF9\u8C61\u4E0D\u7BA1\u662F\u4E0D\u662F\u201C\u671D\u751F\u5915\u6B7B\u201D\uFF0C\u90FD\u4F1A\u76F4\u63A5\u8FDB\u5230\u8001\u5E74\u4EE3\u3002\u8FD9\u6837\u505A\u4E3B\u8981\u662F\u4E3A\u4E86\u907F\u514D\u5728 Eden \u533A\u53CA 2 \u4E2A Survivor \u533A\u4E4B\u95F4\u53D1\u751F\u5927\u91CF\u7684\u5185\u5B58\u590D\u5236\u3002</p><p>2\uFF09<strong>\u957F\u671F\u5B58\u6D3B\u5BF9\u8C61</strong>\uFF0C\u865A\u62DF\u673A\u7ED9\u6BCF\u4E2A\u5BF9\u8C61\u5B9A\u4E49\u4E86\u4E00\u4E2A\u5BF9\u8C61\u5E74\u9F84\uFF08Age\uFF09\u8BA1\u6570\u5668\u3002\u6B63\u5E38\u60C5\u51B5\u4E0B\u5BF9\u8C61\u4F1A\u4E0D\u65AD\u7684\u5728 Survivor \u7684 From \u533A\u4E0E To \u533A\u4E4B\u95F4\u79FB\u52A8\uFF0C\u5BF9\u8C61\u5728 Survivor \u533A\u4E2D\u6BCF\u7ECF\u5386\u4E00\u6B21 Minor GC\uFF0C\u5E74\u9F84\u5C31\u589E\u52A0 1 \u5C81\u3002\u5F53\u5E74\u9F84\u589E\u52A0\u5230 15 \u5C81\u65F6\uFF0C\u8FD9\u65F6\u5019\u5C31\u4F1A\u88AB\u8F6C\u79FB\u5230\u8001\u5E74\u4EE3\u3002\u5F53\u7136\uFF0C\u8FD9\u91CC\u7684 15\uFF0CJVM \u4E5F\u652F\u6301\u8FDB\u884C\u7279\u6B8A\u8BBE\u7F6E\u3002</p><p>3\uFF09<strong>\u52A8\u6001\u5BF9\u8C61\u5E74\u9F84</strong>\uFF0C\u865A\u62DF\u673A\u5E76\u4E0D\u91CD\u89C6\u8981\u6C42\u5BF9\u8C61\u5E74\u9F84\u5FC5\u987B\u5230 15 \u5C81\uFF0C\u624D\u4F1A\u653E\u5165\u8001\u5E74\u533A\uFF0C\u5982\u679C Survivor \u7A7A\u95F4\u4E2D\u76F8\u540C\u5E74\u9F84\u6240\u6709\u5BF9\u8C61\u5927\u5C0F\u7684\u603B\u5408\u5927\u4E8E Survivor \u7A7A\u95F4\u7684\u4E00\u534A\uFF0C\u5E74\u9F84\u5927\u4E8E\u7B49\u4E8E\u8BE5\u5E74\u9F84\u7684\u5BF9\u8C61\u5C31\u53EF\u4EE5\u76F4\u63A5\u8FDB\u53BB\u8001\u5E74\u533A\uFF0C\u65E0\u9700\u7B49\u4F60\u201C\u6210\u5E74\u201D\u3002</p><p>\u8FD9\u5176\u5B9E\u6709\u70B9\u7C7B\u4F3C\u4E8E\u8D1F\u8F7D\u5747\u8861\uFF0C\u8F6E\u8BE2\u662F\u8D1F\u8F7D\u5747\u8861\u7684\u4E00\u79CD\uFF0C\u4FDD\u8BC1\u6BCF\u53F0\u673A\u5668\u90FD\u5206\u5F97\u540C\u6837\u7684\u8BF7\u6C42\u3002\u770B\u4F3C\u5F88\u5747\u8861\uFF0C\u4F46\u6BCF\u53F0\u673A\u7684\u786C\u4EF6\u4E0D\u901A\uFF0C\u5065\u5EB7\u72B6\u51B5\u4E0D\u540C\uFF0C\u6211\u4EEC\u8FD8\u53EF\u4EE5\u57FA\u4E8E\u6BCF\u53F0\u673A\u63A5\u53D7\u7684\u8BF7\u6C42\u6570\uFF0C\u6216\u6BCF\u53F0\u673A\u7684\u54CD\u5E94\u65F6\u95F4\u7B49\uFF0C\u6765\u8C03\u6574\u6211\u4EEC\u7684\u8D1F\u8F7D\u5747\u8861\u7B97\u6CD5\u3002</p><hr>',62),m=r("\u53C2\u8003\u94FE\u63A5\uFF1A"),d={href:"https://mp.weixin.qq.com/s/RQGImK3-SrvJfs8eYCiv4A",target:"_blank",rel:"noopener 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diff --git a/dist/assets/tupian-zhuanlian.html.7e57c89c.js b/dist/assets/tupian-zhuanlian.html.cc248511.js
similarity index 99%
rename from dist/assets/tupian-zhuanlian.html.7e57c89c.js
rename to dist/assets/tupian-zhuanlian.html.cc248511.js
index aefa9513..ff805e71 100644
--- a/dist/assets/tupian-zhuanlian.html.7e57c89c.js
+++ b/dist/assets/tupian-zhuanlian.html.cc248511.js
@@ -1,4 +1,4 @@
-import{_ as t}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o,c as i,a,b as c,e as s,d as n}from"./app.a0271b9c.js";const l={},u=s(`<p>\u4F5C\u4E3A\u4E00\u540D\u6280\u672F\u535A\u4E3B\uFF0C\u7ECF\u5E38\u9700\u8981\u628A\u540C\u4E00\u4EFD MD \u6587\u4EF6\u540C\u6B65\u5230\u4E0D\u540C\u7684\u535A\u5BA2\u5E73\u53F0\uFF0C\u4EE5\u6C42\u83B7\u5F97\u66F4\u591A\u7684\u66DD\u5149\uFF0C\u4ECE\u800C\u5E2E\u52A9\u5230\u66F4\u591A\u7684\u5C0F\u4F19\u4F34\u2014\u2014\u77A7\u6211\u8FD9\u201C\u8FBE\u5219\u517C\u6D4E\u5929\u4E0B\u201D\u7684\u96C4\u5FC3\u58EE\u5FD7\u3002\u50CF CSDN \u548C\u6398\u91D1\u8FD9\u4E24\u4E2A\u535A\u5BA2\u5E73\u53F0\u90FD\u6709\u81EA\u5DF1\u7684\u5916\u94FE\u56FE\u7247\u89E3\u6790\u529F\u80FD\u3002</p><p>\u5F53\u6211\u628A MD \u6E90\u6587\u6863\u590D\u5236\u5230 CSDN \u6216\u8005\u6398\u91D1\u7684\u7F16\u8F91\u5668\u4E2D\uFF0C\u5B83\u4EEC\u4F1A\u81EA\u52A8\u5730\u5E2E\u6211\u628A\u5916\u94FE\u8F6C\u6210\u5185\u94FE\uFF0C\u8FD9\u6837\u6211\u5C31\u4E0D\u7528\u518D\u91CD\u65B0\u4E0A\u4F20\u56FE\u7247\uFF0C\u4E5F\u4E0D\u9700\u8981\u914D\u7F6E\u81EA\u5DF1\u7684\u56FE\u5E8A\u4E86\uFF0C\u5426\u5219\u56FE\u7247\u4F1A\u56E0\u4E3A\u9632\u76D7\u94FE\u7684\u539F\u56E0\u663E\u793A\u4E0D\u51FA\u6765\u3002</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>\u4E3E\u4E2A\u4F8B\u5B50\uFF0C\u73B0\u5728\u6709\u8FD9\u6837\u4E00\u6BB5 MD \u6587\u6863\uFF0C\u91CC\u9762\u6709\u4E00\u5F20\u56FE\u7247\u3002
+import{_ as t}from"./plugin-vue_export-helper.21dcd24c.js";import{r as p,o,c as i,a,b as c,e as s,d as n}from"./app.615e41d8.js";const l={},u=s(`<p>\u4F5C\u4E3A\u4E00\u540D\u6280\u672F\u535A\u4E3B\uFF0C\u7ECF\u5E38\u9700\u8981\u628A\u540C\u4E00\u4EFD MD \u6587\u4EF6\u540C\u6B65\u5230\u4E0D\u540C\u7684\u535A\u5BA2\u5E73\u53F0\uFF0C\u4EE5\u6C42\u83B7\u5F97\u66F4\u591A\u7684\u66DD\u5149\uFF0C\u4ECE\u800C\u5E2E\u52A9\u5230\u66F4\u591A\u7684\u5C0F\u4F19\u4F34\u2014\u2014\u77A7\u6211\u8FD9\u201C\u8FBE\u5219\u517C\u6D4E\u5929\u4E0B\u201D\u7684\u96C4\u5FC3\u58EE\u5FD7\u3002\u50CF CSDN \u548C\u6398\u91D1\u8FD9\u4E24\u4E2A\u535A\u5BA2\u5E73\u53F0\u90FD\u6709\u81EA\u5DF1\u7684\u5916\u94FE\u56FE\u7247\u89E3\u6790\u529F\u80FD\u3002</p><p>\u5F53\u6211\u628A MD \u6E90\u6587\u6863\u590D\u5236\u5230 CSDN \u6216\u8005\u6398\u91D1\u7684\u7F16\u8F91\u5668\u4E2D\uFF0C\u5B83\u4EEC\u4F1A\u81EA\u52A8\u5730\u5E2E\u6211\u628A\u5916\u94FE\u8F6C\u6210\u5185\u94FE\uFF0C\u8FD9\u6837\u6211\u5C31\u4E0D\u7528\u518D\u91CD\u65B0\u4E0A\u4F20\u56FE\u7247\uFF0C\u4E5F\u4E0D\u9700\u8981\u914D\u7F6E\u81EA\u5DF1\u7684\u56FE\u5E8A\u4E86\uFF0C\u5426\u5219\u56FE\u7247\u4F1A\u56E0\u4E3A\u9632\u76D7\u94FE\u7684\u539F\u56E0\u663E\u793A\u4E0D\u51FA\u6765\u3002</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>\u4E3E\u4E2A\u4F8B\u5B50\uFF0C\u73B0\u5728\u6709\u8FD9\u6837\u4E00\u6BB5 MD \u6587\u6863\uFF0C\u91CC\u9762\u6709\u4E00\u5F20\u56FE\u7247\u3002
 
 ![](http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tupian-zhuanlian-1.png)
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>\u628A\u4E0A\u9762\u7684 MD \u6587\u6863\u590D\u5236\u5230\u6398\u91D1\u7F16\u8F91\u5668\u7684\u65F6\u5019\uFF0C\u5C31\u4F1A\u51FA\u73B0\u300C\u56FE\u7247\u89E3\u6790\u4E2D...\u300D\uFF01\u4F46\u4F1A\u4E00\u76F4\u5361\u5728\u8FD9\u91CC\uFF0C\u518D\u4E5F\u89E3\u6790\u4E0D\u4E0B\u53BB\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tupian-zhuanlian-2.png" alt=""></p><p>\u8FD9\u662F\u56E0\u4E3A\u56FE\u7247\u52A0\u4E86\u9632\u76D7\u94FE\uFF0C\u6398\u91D1\u8FD9\u4E48\u725B\u903C\u7684\u793E\u533A\u5728\u89E3\u6790\u7684\u65F6\u5019\u4E5F\u4F1A\u5931\u8D25\u3002CSDN \u7684\u8F6C\u94FE\u529F\u80FD\u66F4\u725B\u903C\u4E00\u70B9\uFF0C\u57FA\u672C\u4E0A\u53EF\u4EE5\u65E0\u89C6\u9632\u76D7\u94FE\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tupian-zhuanlian-3.png" alt=""></p><p>\u8FD8\u6709\u4E00\u4E9B\u535A\u5BA2\u5E73\u53F0\u662F\u6CA1\u6709\u8F6C\u94FE\u529F\u80FD\u7684\uFF0C\u6BD4\u5982\u8BF4\u4E8C\u54E5\u7684\u9759\u6001\u5C0F\u7834\u7AD9\u300AJava \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF\u300B\u3002\u600E\u4E48\u529E\u5462\uFF1F\u6211\u4E00\u5F00\u59CB\u7684\u89E3\u51B3\u65B9\u6848\u662F\uFF1A</p><ul><li>\u5148\u5C06\u56FE\u7247\u624B\u52A8\u4E00\u5F20\u5F20\u4E0B\u8F7D\u5230\u672C\u5730</li><li>\u518D\u5C06\u672C\u5730\u56FE\u7247\u4E0A\u4F20\u5230 GitHub \u6307\u5B9A\u7684\u4ED3\u5E93</li><li>\u4FEE\u6539 MD \u6587\u6863\u4E2D\u7684\u56FE\u7247\u94FE\u63A5\uFF0C\u4F7F\u7528 CDN \u52A0\u901F\u670D\u52A1</li></ul><p>\u8FD9\u6837\u5C31\u80FD\u89E3\u51B3\u95EE\u9898\uFF0C\u4F46\u662F\u9700\u8981\u624B\u52A8\u53BB\u505A\u8FD9\u4E9B\u91CD\u590D\u7684\u52A8\u4F5C\uFF0C\u5C24\u5176\u9047\u5230\u4E00\u7BC7\u6587\u7AE0\u6709\u4E8C\u4E09\u5341\u5F20\u56FE\u7247\u7684\u65F6\u5019\u5C31\u5F88\u70E6\u3002\u8FD9\u6709\u70B9\u4E27\u5931\u6211\u4F5C\u4E3A\u7A0B\u5E8F\u5458\u7684\u5C0A\u4E25\u554A\uFF01</p><p>\u9996\u5148\u8981\u89E3\u51B3\u7684\u662F\u56FE\u7247\u4E0B\u8F7D\u7684\u95EE\u9898\uFF0C\u53EF\u4EE5\u5229\u7528\u722C\u866B\u6280\u672F\uFF1A\u722C\u866B\u722C\u5F97\u65E9\uFF0C\u5C40\u5B50\u8FDB\u7684\u65E9\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tupian-zhuanlian-4.png" alt=""></p><h3 id="\u4E8C\u3001\u5173\u4E8E-java-\u722C\u866B" tabindex="-1"><a class="header-anchor" href="#\u4E8C\u3001\u5173\u4E8E-java-\u722C\u866B" aria-hidden="true">#</a> \u4E8C\u3001\u5173\u4E8E Java \u722C\u866B</h3><p>Java \u722C\u866B\u7684\u7C7B\u5E93\u975E\u5E38\u591A\uFF0C\u6BD4\u5982\u8BF4 crawler4j\uFF0C\u6211\u4E2A\u4EBA\u66F4\u559C\u6B22 jsoup\uFF0C\u5B83\u66F4\u8F7B\u91CF\u7EA7\u3002jsoup \u662F\u4E00\u6B3E\u7528\u4E8E\u89E3\u6790 HTML \u7684 Java \u7C7B\u5E93\uFF0C\u63D0\u4F9B\u4E86\u4E00\u5957\u975E\u5E38\u4FBF\u6377\u7684 API\uFF0C\u7528\u4E8E\u63D0\u53D6\u548C\u64CD\u4F5C\u6570\u636E\u3002</p><blockquote><p>\u5B98\u7F51\u5730\u5740\uFF1Ahttps://jsoup.org/</p></blockquote><p>jsoup \u76EE\u524D\u5728 GitHub \u4E0A\u5DF2\u7ECF\u6536\u83B7 9.3k+ \u7684 star\uFF0C\u53EF\u4EE5\u8BF4\u662F\u975E\u5E38\u7684\u53D7\u6B22\u8FCE\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tupian-zhuanlian-5.png" alt=""></p><p>jsoup \u6709\u4EE5\u4E0B\u7279\u6027\uFF1A</p><ul><li>\u53EF\u4EE5\u4ECE URL\u3001\u6587\u4EF6\u6216\u8005\u5B57\u7B26\u4E32\u4E2D\u6293\u53D6\u548C\u89E3\u6790</li><li>\u53EF\u4EE5\u4F7F\u7528 DOM \u904D\u5386\u6216\u8005 CSS \u9009\u62E9\u5668\u67E5\u627E\u548C\u63D0\u53D6\u6570\u636E</li><li>\u53EF\u4EE5\u64CD\u4F5C HTML \u5143\u7D20\u3001\u5C5E\u6027\u548C\u6587\u672C</li><li>\u53EF\u4EE5\u8F93\u51FA\u6574\u6D01\u7684 HTML</li></ul><h3 id="\u4E09\u3001\u5B9E\u6218-jsoup" tabindex="-1"><a class="header-anchor" href="#\u4E09\u3001\u5B9E\u6218-jsoup" aria-hidden="true">#</a> \u4E09\u3001\u5B9E\u6218 jsoup</h3><p><strong>\u7B2C\u4E00\u6B65\uFF0C\u6DFB\u52A0 jsoup \u4F9D\u8D56\u5230\u9879\u76EE\u4E2D</strong>\u3002</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
diff --git a/dist/assets/var.html.d8139bc5.js b/dist/assets/var.html.6e7f16a9.js
similarity index 99%
rename from dist/assets/var.html.d8139bc5.js
rename to dist/assets/var.html.6e7f16a9.js
index 152fed80..60d00e32 100644
--- a/dist/assets/var.html.d8139bc5.js
+++ b/dist/assets/var.html.6e7f16a9.js
@@ -1,4 +1,4 @@
-import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as a,c as s,e}from"./app.a0271b9c.js";const p={},t=e(`<h1 id="java\u53D8\u91CF\u7684\u4F5C\u7528\u57DF-\u5C40\u90E8\u53D8\u91CF\u3001\u6210\u5458\u53D8\u91CF\u3001\u9759\u6001\u53D8\u91CF\u3001\u5E38\u91CF" tabindex="-1"><a class="header-anchor" href="#java\u53D8\u91CF\u7684\u4F5C\u7528\u57DF-\u5C40\u90E8\u53D8\u91CF\u3001\u6210\u5458\u53D8\u91CF\u3001\u9759\u6001\u53D8\u91CF\u3001\u5E38\u91CF" aria-hidden="true">#</a> Java\u53D8\u91CF\u7684\u4F5C\u7528\u57DF\uFF1A\u5C40\u90E8\u53D8\u91CF\u3001\u6210\u5458\u53D8\u91CF\u3001\u9759\u6001\u53D8\u91CF\u3001\u5E38\u91CF</h1><p>\u201C\u4E8C\u54E5\uFF0C\u542C\u8BF4 Java \u53D8\u91CF\u5728\u4EE5\u540E\u7684\u65E5\u5B50\u91CC\u7ECF\u5E38\u7528\uFF0C\u80FD\u4E0D\u80FD\u63D0\u524D\u7ED9\u6211\u900F\u9732\u900F\u9732\uFF1F\u201D\u4E09\u59B9\u54AA\u4E86\u4E00\u53E3\u9EA6\u9999\u53EF\u53EF\u5976\u8336\u540E\u5BF9\u6211\u8BF4\u3002</p><p>\u201C\u4E09\u59B9\u554A\uFF0C\u642C\u4E2A\u51F3\u5B50\u5750\u6211\u65C1\u8FB9\uFF0C\u542C\u4E8C\u54E5\u6765\u7ED9\u4F60\u6162\u6162\u8BF4\u554A\u3002\u201D</p><p>Java \u53D8\u91CF\u5C31\u597D\u50CF\u4E00\u4E2A\u5BB9\u5668\uFF0C\u53EF\u4EE5\u4FDD\u5B58\u7A0B\u5E8F\u5728\u8FD0\u884C\u8FC7\u7A0B\u4E2D\u7684\u503C\uFF0C\u5B83\u5728\u58F0\u660E\u7684\u65F6\u5019\u4F1A\u5B9A\u4E49\u5BF9\u5E94\u7684\u6570\u636E\u7C7B\u578B\uFF08Java \u5206\u4E3A\u4E24\u79CD\u6570\u636E\u7C7B\u578B\uFF1A\u57FA\u672C\u6570\u636E\u7C7B\u578B\u548C\u5F15\u7528\u6570\u636E\u7C7B\u578B\uFF09\u3002\u53D8\u91CF\u6309\u7167\u4F5C\u7528\u57DF\u7684\u8303\u56F4\u53C8\u53EF\u5206\u4E3A\u4E09\u79CD\u7C7B\u578B\uFF1A\u5C40\u90E8\u53D8\u91CF\uFF0C\u6210\u5458\u53D8\u91CF\u548C\u9759\u6001\u53D8\u91CF\u3002</p><p>\u6BD4\u5982\u8BF4\uFF0C<code>int data = 88;</code>\uFF0C\u5176\u4E2D data \u5C31\u662F\u4E00\u4E2A\u53D8\u91CF\uFF0C\u5B83\u7684\u503C\u4E3A 88\uFF0C\u7C7B\u578B\u4E3A\u6574\u578B\uFF08int\uFF09\u3002</p><h3 id="_01\u3001\u5C40\u90E8\u53D8\u91CF" tabindex="-1"><a class="header-anchor" href="#_01\u3001\u5C40\u90E8\u53D8\u91CF" aria-hidden="true">#</a> 01\u3001\u5C40\u90E8\u53D8\u91CF</h3><p>\u5728\u65B9\u6CD5\u4F53\u5185\u58F0\u660E\u7684\u53D8\u91CF\u88AB\u79F0\u4E3A\u5C40\u90E8\u53D8\u91CF\uFF0C\u8BE5\u53D8\u91CF\u53EA\u80FD\u5728\u8BE5\u65B9\u6CD5\u5185\u4F7F\u7528\uFF0C\u7C7B\u4E2D\u7684\u5176\u4ED6\u65B9\u6CD5\u5E76\u4E0D\u77E5\u9053\u8BE5\u53D8\u91CF\u3002\u6765\u770B\u4E0B\u9762\u8FD9\u4E2A\u793A\u4F8B\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token doc-comment comment">/**
+import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as a,c as s,e}from"./app.615e41d8.js";const p={},t=e(`<h1 id="java\u53D8\u91CF\u7684\u4F5C\u7528\u57DF-\u5C40\u90E8\u53D8\u91CF\u3001\u6210\u5458\u53D8\u91CF\u3001\u9759\u6001\u53D8\u91CF\u3001\u5E38\u91CF" tabindex="-1"><a class="header-anchor" href="#java\u53D8\u91CF\u7684\u4F5C\u7528\u57DF-\u5C40\u90E8\u53D8\u91CF\u3001\u6210\u5458\u53D8\u91CF\u3001\u9759\u6001\u53D8\u91CF\u3001\u5E38\u91CF" aria-hidden="true">#</a> Java\u53D8\u91CF\u7684\u4F5C\u7528\u57DF\uFF1A\u5C40\u90E8\u53D8\u91CF\u3001\u6210\u5458\u53D8\u91CF\u3001\u9759\u6001\u53D8\u91CF\u3001\u5E38\u91CF</h1><p>\u201C\u4E8C\u54E5\uFF0C\u542C\u8BF4 Java \u53D8\u91CF\u5728\u4EE5\u540E\u7684\u65E5\u5B50\u91CC\u7ECF\u5E38\u7528\uFF0C\u80FD\u4E0D\u80FD\u63D0\u524D\u7ED9\u6211\u900F\u9732\u900F\u9732\uFF1F\u201D\u4E09\u59B9\u54AA\u4E86\u4E00\u53E3\u9EA6\u9999\u53EF\u53EF\u5976\u8336\u540E\u5BF9\u6211\u8BF4\u3002</p><p>\u201C\u4E09\u59B9\u554A\uFF0C\u642C\u4E2A\u51F3\u5B50\u5750\u6211\u65C1\u8FB9\uFF0C\u542C\u4E8C\u54E5\u6765\u7ED9\u4F60\u6162\u6162\u8BF4\u554A\u3002\u201D</p><p>Java \u53D8\u91CF\u5C31\u597D\u50CF\u4E00\u4E2A\u5BB9\u5668\uFF0C\u53EF\u4EE5\u4FDD\u5B58\u7A0B\u5E8F\u5728\u8FD0\u884C\u8FC7\u7A0B\u4E2D\u7684\u503C\uFF0C\u5B83\u5728\u58F0\u660E\u7684\u65F6\u5019\u4F1A\u5B9A\u4E49\u5BF9\u5E94\u7684\u6570\u636E\u7C7B\u578B\uFF08Java \u5206\u4E3A\u4E24\u79CD\u6570\u636E\u7C7B\u578B\uFF1A\u57FA\u672C\u6570\u636E\u7C7B\u578B\u548C\u5F15\u7528\u6570\u636E\u7C7B\u578B\uFF09\u3002\u53D8\u91CF\u6309\u7167\u4F5C\u7528\u57DF\u7684\u8303\u56F4\u53C8\u53EF\u5206\u4E3A\u4E09\u79CD\u7C7B\u578B\uFF1A\u5C40\u90E8\u53D8\u91CF\uFF0C\u6210\u5458\u53D8\u91CF\u548C\u9759\u6001\u53D8\u91CF\u3002</p><p>\u6BD4\u5982\u8BF4\uFF0C<code>int data = 88;</code>\uFF0C\u5176\u4E2D data \u5C31\u662F\u4E00\u4E2A\u53D8\u91CF\uFF0C\u5B83\u7684\u503C\u4E3A 88\uFF0C\u7C7B\u578B\u4E3A\u6574\u578B\uFF08int\uFF09\u3002</p><h3 id="_01\u3001\u5C40\u90E8\u53D8\u91CF" tabindex="-1"><a class="header-anchor" href="#_01\u3001\u5C40\u90E8\u53D8\u91CF" aria-hidden="true">#</a> 01\u3001\u5C40\u90E8\u53D8\u91CF</h3><p>\u5728\u65B9\u6CD5\u4F53\u5185\u58F0\u660E\u7684\u53D8\u91CF\u88AB\u79F0\u4E3A\u5C40\u90E8\u53D8\u91CF\uFF0C\u8BE5\u53D8\u91CF\u53EA\u80FD\u5728\u8BE5\u65B9\u6CD5\u5185\u4F7F\u7528\uFF0C\u7C7B\u4E2D\u7684\u5176\u4ED6\u65B9\u6CD5\u5E76\u4E0D\u77E5\u9053\u8BE5\u53D8\u91CF\u3002\u6765\u770B\u4E0B\u9762\u8FD9\u4E2A\u793A\u4F8B\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token doc-comment comment">/**
  * <span class="token keyword">@author</span> \u5FAE\u4FE1\u641C\u300C\u6C89\u9ED8\u738B\u4E8C\u300D\uFF0C\u56DE\u590D\u5173\u952E\u5B57 PDF
  */</span>
 <span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">LocalVariable</span> <span class="token punctuation">{</span>
diff --git a/dist/assets/varables.html.4e32dd4f.js b/dist/assets/varables.html.3f84ac76.js
similarity index 99%
rename from dist/assets/varables.html.4e32dd4f.js
rename to dist/assets/varables.html.3f84ac76.js
index 3ada252e..fa9be1b7 100644
--- a/dist/assets/varables.html.4e32dd4f.js
+++ b/dist/assets/varables.html.3f84ac76.js
@@ -1,4 +1,4 @@
-import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e as t}from"./app.a0271b9c.js";const p={},o=t(`<h1 id="java\u4E2D\u53EF\u53D8\u53C2\u6570\u7684\u4F7F\u7528" tabindex="-1"><a class="header-anchor" href="#java\u4E2D\u53EF\u53D8\u53C2\u6570\u7684\u4F7F\u7528" aria-hidden="true">#</a> Java\u4E2D\u53EF\u53D8\u53C2\u6570\u7684\u4F7F\u7528</h1><p>\u4E3A\u4E86\u8BA9\u94C1\u7C89\u4EEC\u80FD\u767D\u7968\u5230\u963F\u91CC\u4E91\u7684\u670D\u52A1\u5668\uFF0C\u8001\u738B\u5F53\u4E86\u6574\u6574\u4E24\u5929\u7684\u5BA2\u670D\uFF0C\u771F\u6B63\u4F53\u9A8C\u5230\u4E86\u4EC0\u4E48\u53EB\u505A\u201C\u4E3A\u4EBA\u6C11\u7FA4\u4F17\u8C0B\u798F\u5229\u201D\u7684\u4E0D\u6613\u548C\u8F9B\u9178\u3002\u6B63\u5728\u4ED6\u773C\u775B\u7EA2\u80BF\u6253\u7B97\u8981\u4F11\u606F\u4E4B\u9645\uFF0C\u5C0F\u4E8C\u8DD1\u8FC7\u6765\u95EE\u4ED6\uFF1A\u201CJava \u7684\u53EF\u53D8\u53C2\u6570\u7A76\u7ADF\u662F\u600E\u4E48\u4E00\u56DE\u4E8B\uFF1F\u201D\u8001\u738B\u4E00\u4E0B\u5B50\u53C8\u6E05\u9192\u4E86\uFF0C\u4ED6\u7231 Java\uFF0C\u4ED6\u7231\u4F20\u9053\u89E3\u60D1\uFF0C\u4ED6\u7231\u8FD9\u7FA4\u5C0A\u656C\u4ED6\u7684\u8BFB\u8005\u3002</p><p>\u53EF\u53D8\u53C2\u6570\u662F Java 1.5 \u7684\u65F6\u5019\u5F15\u5165\u7684\u529F\u80FD\uFF0C\u5B83\u5141\u8BB8\u65B9\u6CD5\u4F7F\u7528\u4EFB\u610F\u591A\u4E2A\u3001\u7C7B\u578B\u76F8\u540C\uFF08<code>is-a</code>\uFF09\u7684\u503C\u4F5C\u4E3A\u53C2\u6570\u3002\u5C31\u50CF\u4E0B\u9762\u8FD9\u6837\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">void</span> <span class="token function">main</span><span class="token punctuation">(</span><span class="token class-name">String</span><span class="token punctuation">[</span><span class="token punctuation">]</span> args<span class="token punctuation">)</span> <span class="token punctuation">{</span>
+import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e as t}from"./app.615e41d8.js";const p={},o=t(`<h1 id="java\u4E2D\u53EF\u53D8\u53C2\u6570\u7684\u4F7F\u7528" tabindex="-1"><a class="header-anchor" href="#java\u4E2D\u53EF\u53D8\u53C2\u6570\u7684\u4F7F\u7528" aria-hidden="true">#</a> Java\u4E2D\u53EF\u53D8\u53C2\u6570\u7684\u4F7F\u7528</h1><p>\u4E3A\u4E86\u8BA9\u94C1\u7C89\u4EEC\u80FD\u767D\u7968\u5230\u963F\u91CC\u4E91\u7684\u670D\u52A1\u5668\uFF0C\u8001\u738B\u5F53\u4E86\u6574\u6574\u4E24\u5929\u7684\u5BA2\u670D\uFF0C\u771F\u6B63\u4F53\u9A8C\u5230\u4E86\u4EC0\u4E48\u53EB\u505A\u201C\u4E3A\u4EBA\u6C11\u7FA4\u4F17\u8C0B\u798F\u5229\u201D\u7684\u4E0D\u6613\u548C\u8F9B\u9178\u3002\u6B63\u5728\u4ED6\u773C\u775B\u7EA2\u80BF\u6253\u7B97\u8981\u4F11\u606F\u4E4B\u9645\uFF0C\u5C0F\u4E8C\u8DD1\u8FC7\u6765\u95EE\u4ED6\uFF1A\u201CJava \u7684\u53EF\u53D8\u53C2\u6570\u7A76\u7ADF\u662F\u600E\u4E48\u4E00\u56DE\u4E8B\uFF1F\u201D\u8001\u738B\u4E00\u4E0B\u5B50\u53C8\u6E05\u9192\u4E86\uFF0C\u4ED6\u7231 Java\uFF0C\u4ED6\u7231\u4F20\u9053\u89E3\u60D1\uFF0C\u4ED6\u7231\u8FD9\u7FA4\u5C0A\u656C\u4ED6\u7684\u8BFB\u8005\u3002</p><p>\u53EF\u53D8\u53C2\u6570\u662F Java 1.5 \u7684\u65F6\u5019\u5F15\u5165\u7684\u529F\u80FD\uFF0C\u5B83\u5141\u8BB8\u65B9\u6CD5\u4F7F\u7528\u4EFB\u610F\u591A\u4E2A\u3001\u7C7B\u578B\u76F8\u540C\uFF08<code>is-a</code>\uFF09\u7684\u503C\u4F5C\u4E3A\u53C2\u6570\u3002\u5C31\u50CF\u4E0B\u9762\u8FD9\u6837\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">void</span> <span class="token function">main</span><span class="token punctuation">(</span><span class="token class-name">String</span><span class="token punctuation">[</span><span class="token punctuation">]</span> args<span class="token punctuation">)</span> <span class="token punctuation">{</span>
     <span class="token function">print</span><span class="token punctuation">(</span><span class="token string">&quot;\u6C89&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
     <span class="token function">print</span><span class="token punctuation">(</span><span class="token string">&quot;\u6C89&quot;</span><span class="token punctuation">,</span> <span class="token string">&quot;\u9ED8&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
     <span class="token function">print</span><span class="token punctuation">(</span><span class="token string">&quot;\u6C89&quot;</span><span class="token punctuation">,</span> <span class="token string">&quot;\u9ED8&quot;</span><span class="token punctuation">,</span> <span class="token string">&quot;\u738B&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
diff --git a/dist/assets/volatile.html.e6448db8.js b/dist/assets/volatile.html.4f34c8de.js
similarity index 99%
rename from dist/assets/volatile.html.e6448db8.js
rename to dist/assets/volatile.html.4f34c8de.js
index e869e500..eceff90e 100644
--- a/dist/assets/volatile.html.e6448db8.js
+++ b/dist/assets/volatile.html.4f34c8de.js
@@ -1,4 +1,4 @@
-import{_ as o}from"./plugin-vue_export-helper.21dcd24c.js";import{r as t,o as l,c as p,a as n,b as s,e as c,d as e}from"./app.a0271b9c.js";const i={},r=c(`<h1 id="java\u5E76\u53D1\u7F16\u7A0Bvolatile\u5173\u952E\u5B57\u89E3\u6790" tabindex="-1"><a class="header-anchor" href="#java\u5E76\u53D1\u7F16\u7A0Bvolatile\u5173\u952E\u5B57\u89E3\u6790" aria-hidden="true">#</a> Java\u5E76\u53D1\u7F16\u7A0Bvolatile\u5173\u952E\u5B57\u89E3\u6790</h1><h2 id="\u51E0\u4E2A\u57FA\u672C\u6982\u5FF5" tabindex="-1"><a class="header-anchor" href="#\u51E0\u4E2A\u57FA\u672C\u6982\u5FF5" aria-hidden="true">#</a> \u51E0\u4E2A\u57FA\u672C\u6982\u5FF5</h2><p>\u5728\u4ECB\u7ECDvolatile\u4E4B\u524D\uFF0C\u6211\u4EEC\u5148\u56DE\u987E\u53CA\u4ECB\u7ECD\u51E0\u4E2A\u57FA\u672C\u7684\u6982\u5FF5\u3002</p><h3 id="\u5185\u5B58\u53EF\u89C1\u6027" tabindex="-1"><a class="header-anchor" href="#\u5185\u5B58\u53EF\u89C1\u6027" aria-hidden="true">#</a> \u5185\u5B58\u53EF\u89C1\u6027</h3><p>\u5728Java\u5185\u5B58\u6A21\u578B\u90A3\u4E00\u7AE0\u6211\u4EEC\u4ECB\u7ECD\u4E86JMM\u6709\u4E00\u4E2A\u4E3B\u5185\u5B58\uFF0C\u6BCF\u4E2A\u7EBF\u7A0B\u6709\u81EA\u5DF1\u79C1\u6709\u7684\u5DE5\u4F5C\u5185\u5B58\uFF0C\u5DE5\u4F5C\u5185\u5B58\u4E2D\u4FDD\u5B58\u4E86\u4E00\u4E9B\u53D8\u91CF\u5728\u4E3B\u5185\u5B58\u7684\u62F7\u8D1D\u3002</p><p><strong>\u5185\u5B58\u53EF\u89C1\u6027\uFF0C\u6307\u7684\u662F\u7EBF\u7A0B\u4E4B\u95F4\u7684\u53EF\u89C1\u6027\uFF0C\u5F53\u4E00\u4E2A\u7EBF\u7A0B\u4FEE\u6539\u4E86\u5171\u4EAB\u53D8\u91CF\u65F6\uFF0C\u53E6\u4E00\u4E2A\u7EBF\u7A0B\u53EF\u4EE5\u8BFB\u53D6\u5230\u8FD9\u4E2A\u4FEE\u6539\u540E\u7684\u503C</strong>\u3002</p><h3 id="\u91CD\u6392\u5E8F" tabindex="-1"><a class="header-anchor" href="#\u91CD\u6392\u5E8F" aria-hidden="true">#</a> \u91CD\u6392\u5E8F</h3><p>\u4E3A\u4F18\u5316\u7A0B\u5E8F\u6027\u80FD\uFF0C\u5BF9\u539F\u6709\u7684\u6307\u4EE4\u6267\u884C\u987A\u5E8F\u8FDB\u884C\u4F18\u5316\u91CD\u65B0\u6392\u5E8F\u3002\u91CD\u6392\u5E8F\u53EF\u80FD\u53D1\u751F\u5728\u591A\u4E2A\u9636\u6BB5\uFF0C\u6BD4\u5982\u7F16\u8BD1\u91CD\u6392\u5E8F\u3001CPU\u91CD\u6392\u5E8F\u7B49\u3002</p><h3 id="happens-before\u89C4\u5219" tabindex="-1"><a class="header-anchor" href="#happens-before\u89C4\u5219" aria-hidden="true">#</a> happens-before\u89C4\u5219</h3><p>\u662F\u4E00\u4E2A\u7ED9\u7A0B\u5E8F\u5458\u4F7F\u7528\u7684\u89C4\u5219\uFF0C\u53EA\u8981\u7A0B\u5E8F\u5458\u5728\u5199\u4EE3\u7801\u7684\u65F6\u5019\u9075\u5FAAhappens-before\u89C4\u5219\uFF0CJVM\u5C31\u80FD\u4FDD\u8BC1\u6307\u4EE4\u5728\u591A\u7EBF\u7A0B\u4E4B\u95F4\u7684\u987A\u5E8F\u6027\u7B26\u5408\u7A0B\u5E8F\u5458\u7684\u9884\u671F\u3002</p><h2 id="volatile\u7684\u5185\u5B58\u8BED\u4E49" tabindex="-1"><a class="header-anchor" href="#volatile\u7684\u5185\u5B58\u8BED\u4E49" aria-hidden="true">#</a> volatile\u7684\u5185\u5B58\u8BED\u4E49</h2><p>\u5728Java\u4E2D\uFF0Cvolatile\u5173\u952E\u5B57\u6709\u7279\u6B8A\u7684\u5185\u5B58\u8BED\u4E49\u3002volatile\u4E3B\u8981\u6709\u4EE5\u4E0B\u4E24\u4E2A\u529F\u80FD\uFF1A</p><ul><li>\u4FDD\u8BC1\u53D8\u91CF\u7684<strong>\u5185\u5B58\u53EF\u89C1\u6027</strong></li><li>\u7981\u6B62volatile\u53D8\u91CF\u4E0E\u666E\u901A\u53D8\u91CF<strong>\u91CD\u6392\u5E8F</strong>\uFF08JSR133\u63D0\u51FA\uFF0CJava 5 \u5F00\u59CB\u624D\u6709\u8FD9\u4E2A\u201C\u589E\u5F3A\u7684volatile\u5185\u5B58\u8BED\u4E49\u201D\uFF09</li></ul><h3 id="\u5185\u5B58\u53EF\u89C1\u6027-1" tabindex="-1"><a class="header-anchor" href="#\u5185\u5B58\u53EF\u89C1\u6027-1" aria-hidden="true">#</a> \u5185\u5B58\u53EF\u89C1\u6027</h3><p>\u4EE5\u4E00\u6BB5\u793A\u4F8B\u4EE3\u7801\u5F00\u59CB\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">VolatileExample</span> <span class="token punctuation">{</span>
+import{_ as o}from"./plugin-vue_export-helper.21dcd24c.js";import{r as t,o as l,c as p,a as n,b as s,e as c,d as e}from"./app.615e41d8.js";const i={},r=c(`<h1 id="java\u5E76\u53D1\u7F16\u7A0Bvolatile\u5173\u952E\u5B57\u89E3\u6790" tabindex="-1"><a class="header-anchor" href="#java\u5E76\u53D1\u7F16\u7A0Bvolatile\u5173\u952E\u5B57\u89E3\u6790" aria-hidden="true">#</a> Java\u5E76\u53D1\u7F16\u7A0Bvolatile\u5173\u952E\u5B57\u89E3\u6790</h1><h2 id="\u51E0\u4E2A\u57FA\u672C\u6982\u5FF5" tabindex="-1"><a class="header-anchor" href="#\u51E0\u4E2A\u57FA\u672C\u6982\u5FF5" aria-hidden="true">#</a> \u51E0\u4E2A\u57FA\u672C\u6982\u5FF5</h2><p>\u5728\u4ECB\u7ECDvolatile\u4E4B\u524D\uFF0C\u6211\u4EEC\u5148\u56DE\u987E\u53CA\u4ECB\u7ECD\u51E0\u4E2A\u57FA\u672C\u7684\u6982\u5FF5\u3002</p><h3 id="\u5185\u5B58\u53EF\u89C1\u6027" tabindex="-1"><a class="header-anchor" href="#\u5185\u5B58\u53EF\u89C1\u6027" aria-hidden="true">#</a> \u5185\u5B58\u53EF\u89C1\u6027</h3><p>\u5728Java\u5185\u5B58\u6A21\u578B\u90A3\u4E00\u7AE0\u6211\u4EEC\u4ECB\u7ECD\u4E86JMM\u6709\u4E00\u4E2A\u4E3B\u5185\u5B58\uFF0C\u6BCF\u4E2A\u7EBF\u7A0B\u6709\u81EA\u5DF1\u79C1\u6709\u7684\u5DE5\u4F5C\u5185\u5B58\uFF0C\u5DE5\u4F5C\u5185\u5B58\u4E2D\u4FDD\u5B58\u4E86\u4E00\u4E9B\u53D8\u91CF\u5728\u4E3B\u5185\u5B58\u7684\u62F7\u8D1D\u3002</p><p><strong>\u5185\u5B58\u53EF\u89C1\u6027\uFF0C\u6307\u7684\u662F\u7EBF\u7A0B\u4E4B\u95F4\u7684\u53EF\u89C1\u6027\uFF0C\u5F53\u4E00\u4E2A\u7EBF\u7A0B\u4FEE\u6539\u4E86\u5171\u4EAB\u53D8\u91CF\u65F6\uFF0C\u53E6\u4E00\u4E2A\u7EBF\u7A0B\u53EF\u4EE5\u8BFB\u53D6\u5230\u8FD9\u4E2A\u4FEE\u6539\u540E\u7684\u503C</strong>\u3002</p><h3 id="\u91CD\u6392\u5E8F" tabindex="-1"><a class="header-anchor" href="#\u91CD\u6392\u5E8F" aria-hidden="true">#</a> \u91CD\u6392\u5E8F</h3><p>\u4E3A\u4F18\u5316\u7A0B\u5E8F\u6027\u80FD\uFF0C\u5BF9\u539F\u6709\u7684\u6307\u4EE4\u6267\u884C\u987A\u5E8F\u8FDB\u884C\u4F18\u5316\u91CD\u65B0\u6392\u5E8F\u3002\u91CD\u6392\u5E8F\u53EF\u80FD\u53D1\u751F\u5728\u591A\u4E2A\u9636\u6BB5\uFF0C\u6BD4\u5982\u7F16\u8BD1\u91CD\u6392\u5E8F\u3001CPU\u91CD\u6392\u5E8F\u7B49\u3002</p><h3 id="happens-before\u89C4\u5219" tabindex="-1"><a class="header-anchor" href="#happens-before\u89C4\u5219" aria-hidden="true">#</a> happens-before\u89C4\u5219</h3><p>\u662F\u4E00\u4E2A\u7ED9\u7A0B\u5E8F\u5458\u4F7F\u7528\u7684\u89C4\u5219\uFF0C\u53EA\u8981\u7A0B\u5E8F\u5458\u5728\u5199\u4EE3\u7801\u7684\u65F6\u5019\u9075\u5FAAhappens-before\u89C4\u5219\uFF0CJVM\u5C31\u80FD\u4FDD\u8BC1\u6307\u4EE4\u5728\u591A\u7EBF\u7A0B\u4E4B\u95F4\u7684\u987A\u5E8F\u6027\u7B26\u5408\u7A0B\u5E8F\u5458\u7684\u9884\u671F\u3002</p><h2 id="volatile\u7684\u5185\u5B58\u8BED\u4E49" tabindex="-1"><a class="header-anchor" href="#volatile\u7684\u5185\u5B58\u8BED\u4E49" aria-hidden="true">#</a> volatile\u7684\u5185\u5B58\u8BED\u4E49</h2><p>\u5728Java\u4E2D\uFF0Cvolatile\u5173\u952E\u5B57\u6709\u7279\u6B8A\u7684\u5185\u5B58\u8BED\u4E49\u3002volatile\u4E3B\u8981\u6709\u4EE5\u4E0B\u4E24\u4E2A\u529F\u80FD\uFF1A</p><ul><li>\u4FDD\u8BC1\u53D8\u91CF\u7684<strong>\u5185\u5B58\u53EF\u89C1\u6027</strong></li><li>\u7981\u6B62volatile\u53D8\u91CF\u4E0E\u666E\u901A\u53D8\u91CF<strong>\u91CD\u6392\u5E8F</strong>\uFF08JSR133\u63D0\u51FA\uFF0CJava 5 \u5F00\u59CB\u624D\u6709\u8FD9\u4E2A\u201C\u589E\u5F3A\u7684volatile\u5185\u5B58\u8BED\u4E49\u201D\uFF09</li></ul><h3 id="\u5185\u5B58\u53EF\u89C1\u6027-1" tabindex="-1"><a class="header-anchor" href="#\u5185\u5B58\u53EF\u89C1\u6027-1" aria-hidden="true">#</a> \u5185\u5B58\u53EF\u89C1\u6027</h3><p>\u4EE5\u4E00\u6BB5\u793A\u4F8B\u4EE3\u7801\u5F00\u59CB\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">VolatileExample</span> <span class="token punctuation">{</span>
     <span class="token keyword">int</span> a <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span>
     <span class="token keyword">volatile</span> <span class="token keyword">boolean</span> flag <span class="token operator">=</span> <span class="token boolean">false</span><span class="token punctuation">;</span>
     
diff --git a/dist/assets/waibao-1geyue.html.1edb2375.js b/dist/assets/waibao-1geyue.html.31a36346.js
similarity index 99%
rename from dist/assets/waibao-1geyue.html.1edb2375.js
rename to dist/assets/waibao-1geyue.html.31a36346.js
index d16c29ea..82f96e82 100644
--- a/dist/assets/waibao-1geyue.html.1edb2375.js
+++ b/dist/assets/waibao-1geyue.html.31a36346.js
@@ -1 +1 @@
-import{_ as e}from"./plugin-vue_export-helper.21dcd24c.js";import{o as a,c as p,e as i}from"./app.a0271b9c.js";const r={},l=i('<p>\u5927\u5BB6\u597D\uFF0C\u6211\u662F\u4E8C\u54E5\u5440\uFF01\u6628\u5929\u542C\u4E00\u4E2A\u524D\u540C\u4E8B\u8BF4\uFF0C\u4ED6\u5728\u516C\u53F8\u8FC7\u5F97\u975E\u5E38\u4E0D\u5F00\u5FC3\uFF0C\u539F\u56E0\u662F\u4ED6\u7684\u4E0A\u7EA7\u88AB\u5904\u5206\u4E86\uFF0C\u5BFC\u81F4\u4ED6\u53D7\u5230\u4E86\u6CE2\u53CA\uFF0C\u6253\u7B97\u88F8\u8F9E\u5168\u804C\u63A5\u5916\u5305\uFF0C\u95EE\u6211\u9760\u8C31\u4E0D\u9760\u8C31\uFF1F\u540E\u9762\u627E\u673A\u4F1A\u7ED9\u5927\u5BB6\u804A\u804A\u6211\u7684\u770B\u6CD5\u3002</p><p>\u4ECA\u5929\u5148\u6765\u5206\u4EAB\u4E00\u4E2A\u7A0B\u5E8F\u5458\u88F8\u8F9E\u63A5\u5355\u7684\u6545\u4E8B\uFF0C\u4E0D\u8FC7\uFF0C\u4ED6\u63A5\u5355\u65F6\u95F4\u6BD4\u8F83\u77ED\uFF0C\u5927\u6982\u4E00\u4E2A\u6708\u3002\u5168\u804C\u63A5\u5355\u524D\uFF0C\u4ED6\u867D\u7136\u5DE5\u4F5C\u4E86\u4E00\u5E74\u6709\u4F59\uFF0C\u4F46\u662F\u9879\u76EE\u7ECF\u5386\u8FD8\u662F\u6BD4\u8F83\u5C11\u3002\u4ED6\u5728\u8FD9\u4E00\u4E2A\u6708\u7684\u63A5\u5355\u4E2D\uFF1A</p><ul><li>\u63A5\u89E6\u4E86\u6211\u975E\u5E38\u964C\u751F\u7684 php\uFF0Cpython\uFF1B</li><li>\u7528 react + django \u5199\u4E86\u4E00\u4E2A\u7B80\u5355\u7684\u793E\u4EA4\u7F51\u7AD9\uFF1B</li><li>\u7528 heroku \u90E8\u7F72\u4E86\u4E24\u4E2A\u7F51\u7AD9\uFF1B\u63A5\u89E6\u4E86\u4EE5\u592A\u574A\u52A0\u5BC6\uFF1B</li><li>\u7528 css3d \u6784\u5EFA\u4E86\u5723\u8BDE\u8282\u7684 3d \u573A\u666F\uFF0C\u5305\u62EC\u4E86\u7528 PS \u753B\u56FE\uFF1B</li><li>\u63A5\u89E6\u4E86\u7092\u80A1\u8F6F\u4EF6\u5F00\u53D1\uFF08vue\uFF09\uFF0C\u5B66\u4F1A\u4E86\u770B k \u7EBF\uFF1B</li><li>\u63A5\u89E6\u4E86 google group varint \u538B\u7F29\u7B97\u6CD5\uFF1B</li><li>\u505A\u4E86\u4E2A\u7F51\u9875\u5E2E\u7559\u5B66\u751F\u5728\u56FD\u5916\u5BA3\u4F20\u6566\u714C\u6587\u5316......</li></ul><p>\u603B\u7684\u6765\u8BF4\uFF0C\u5185\u5BB9\u5F88\u4E30\u5BCC\uFF0C\u867D\u7136\u90FD\u4E0D\u662F\u4EC0\u4E48\u5927\u9700\u6C42\u3002\u7531\u4E8E\u4ED6\u5B66\u4E60\u4E1C\u897F\u6BD4\u8F83\u5FEB\uFF0Cdebug \u80FD\u529B\u8FD8\u884C\uFF0C\u539F\u672C\u53EA\u6253\u7B97\u63A5\u524D\u7AEF\u7684\u5355\u5B50\uFF0C\u4F46\u662F\u603B\u662F\u5728\u81EA\u5DF1\u7684\u80FD\u529B\u8FB9\u754C\u5F98\u5F8A\uFF0C\u4E5F\u5C31\u5B66\u4F1A\u4E86\u89C1\u62DB\u62C6\u62DB\uFF0C\u505A\u4E00\u4E9B\u5176\u4ED6\u8BED\u8A00\u6216\u6846\u67B6\u7684\u5DE5\u4F5C\u3002</p><p>\u4E0B\u9762\u5C31\u7531\u4ED6\u7684\u7B2C\u4E00\u89C6\u89D2\u6765\u5206\u4EAB\u4E00\u4E0B\u5168\u804C\u63A5\u5355\u4E00\u4E2A\u6708\u7684\u611F\u53D7\uFF0C\u5E0C\u671B\u80FD\u7ED9\u5C0F\u4F19\u4F34\u4EEC\u4E00\u70B9\u70B9\u542F\u53D1\u548C\u5E2E\u52A9</p><hr><h3 id="\u80CC\u666F" tabindex="-1"><a class="header-anchor" href="#\u80CC\u666F" aria-hidden="true">#</a> \u80CC\u666F</h3><p>\u9119\u4EBA\u672C\u79D1\u6BD5\u4E1A\u4E00\u5E74\u6709\u4F59\uFF0C\u8BA1\u7B97\u673A\u4E13\u4E1A\u3002\u5168\u6808\u5DE5\u7A0B\u5E08\uFF0C\u4F46\u66F4\u559C\u6B22\u524D\u7AEF\u7684\u5DE5\u4F5C\uFF0C\u4E8E\u662F\u5728\u4E00\u5BB6\u6E38\u620F\u516C\u53F8\u4EFB\u804C\u524D\u7AEF\u5DE5\u4F5C\u3002\u5728\u8FD9\u4E2A\u5185\u5377\u7684\u65F6\u4EE3\uFF0C\u8EAB\u5904\u4E00\u7EBF\u57CE\u5E02\uFF0C\u6765\u81EA\u5168\u56FD\u5404\u5730\u7684\u4F18\u79C0\u5B66\u9662/\u57F9\u8BAD\u673A\u6784\u4EBA\u624D\u8F88\u51FA\uFF0C\u6D8C\u5165\u5E02\u573A\uFF0C\u7ADE\u4E89\u6FC0\u70C8\uFF0C\u5404\u5927\u516C\u53F8\u5E76\u9A71\u4E89\u5148\u7528\u4E30\u539A\u7684\u85AA\u6C34\uFF0C\u4F18\u6E25\u7684\u5F85\u9047\u53BB\u5438\u5F15\u66F4\u4F18\u79C0\u4EBA\u624D\u5165\u804C\u3002</p><p>\u4F46\u662F\uFF0C\u73B0\u5728\u5DF2\u7ECF\u8FC7\u4E86 \u201D\u4E0D\u4F1A\u4F46\u6211\u4F1A\u5B66\u201C 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\u52A8\u673A</h3><p>\u6839\u636E\u524D\u9762\u80CC\u666F\u7684\u4ECB\u7ECD\uFF0C\u5728\u4E0A\u4E00\u4EFD\u5DE5\u4F5C\u51C6\u5907\u79BB\u804C\u524D\uFF0C\u6211\u5DF2\u7ECF\u627E\u597D\u4E0B\u5BB6\u3002\u5E26\u7740\u7F8E\u597D\u7684\u671F\u5F85\u8DF3\u69FD\u8FDB\u5165\u4E4B\u540E\u53D1\u73B0\u4E0E\u60F3\u8C61\u4E4B\u4E2D\u76F8\u5DEE\u751A\u8FDC\uFF0C\u9664\u4E86\u85AA\u8D44\u6BD4\u4E4B\u524D\u9AD8\u4E0D\u5C11\uFF0C\u5176\u4F59\u90FD\u5728\u9884\u671F\u4EE5\u4E0B\u3002\u4E8E\u662F\u4FBF\u9009\u62E9\u4E86\u88F8\u8F9E\uFF08\u867D\u7136\u5165\u804C\u624B\u7EED\u8FD8\u6CA1\u529E\u5B8C\uFF09\uFF0C\u968F\u540E\u867D\u7136\u4E5F\u627E\u4E86\u51E0\u5BB6\uFF0C\u4F46\u662F 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class="header-anchor" href="#\u6536\u5165" aria-hidden="true">#</a> \u6536\u5165</h3><p>\u5927\u5BB6\u6700\u770B\u91CD\u7684\u53EF\u80FD\u5C31\u662F\u6536\u5165\u95EE\u9898\u4E86\uFF0C\u672C\u6587\u6CA1\u6709\u7F51\u4E0A\u8BF4\u7684\u6708\u5165\u5927\u51E0\u4E07\u8FD9\u4E48\u5938\u5F20\u3002\u4ECE\u4E0A\u4E2A\u6708\u5F00\u59CB\u517C\u804C\uFF0C\u5927\u6982\u5DE5\u4F5C\u4E86 20 \u51E0\u5929\uFF0C\u8D5A\u4E86 11K+\uFF0C\u4E0D\u8FC7\u7531\u4E8E\u6709\u4E2D\u4ECB\u8D39\u7684\u5B58\u5728\uFF0C\u5B9E\u9645\u5230\u624B\u4E5F\u5C31 9 \uFF5E 10K\u3002\u4E0D\u8FC7\u5BF9\u4E8E\u4E00\u4EFD\u5728\u5BB6\u7684\u517C\u804C\u5DE5\u4F5C\uFF0C\u8FD9\u4E2A\u6536\u5165\u8FD8\u662F\u8FC7\u5F97\u53BB\u3002</p><p>\u4E0E\u4E00\u4EFD\u7A33\u5B9A\u7684\u5DE5\u4F5C\u4E0D\u540C\uFF0C\u81EA\u5DF1\u63A5\u5355\u4E0D\u5B58\u5728\u4E0A\u73ED\u6478\u9C7C\u8FD9\u4E2A\u6982\u5FF5\u3002\u4E0A\u73ED\u6478\u9C7C\u6478\u4E00\u4E2A\u6708\uFF0C\u4F60\u7684\u5DE5\u8D44\u8FD8\u662F\u4E00\u6837\u7167\u53D1\uFF0C\u540C\u65F6\u4F60\u8FD8\u8981\u8003\u8651\u8282\u5047\u65E5\uFF0C\u4E94\u9669\u4E00\u91D1\u7B49\u7B49\u3002</p><h3 id="\u62A5\u4EF7" tabindex="-1"><a class="header-anchor" href="#\u62A5\u4EF7" aria-hidden="true">#</a> \u62A5\u4EF7</h3><p>\u4E00\u822C\u6765\u8BF4\u62A5\u4EF7\u662F\u6309\u7167\u8FD9\u4E2A\u516C\u5F0F\u6765\u7B97\uFF1A</p><p>\u62A5\u4EF7=\u65E5\u85AA \u2217 \u5DE5\u671F\u62A5\u4EF7 = \u65E5\u85AA * \u5DE5\u671F\u62A5\u4EF7=\u65E5\u85AA \u2217 \u5DE5\u671F</p><p>\u4E0D\u8FC7\u4E5F\u6CA1\u5FC5\u8981\u5B8C\u5168\u6309\u7167\u8FD9\u4E2A\u6807\u51C6\uFF0C\u6211\u7684\u6807\u51C6\u5F88\u7B80\u5355\uFF1A\u4E0D\u4F1A\u56E0\u4E3A\u4EF7\u683C\u592A\u4F4E\u800C\u611F\u5230\u540E\u6094\uFF0C\u4E5F\u4E0D\u4F1A\u56E0\u4E3A\u4EF7\u683C\u592A\u9AD8\u800C\u611F\u5230\u5FC3\u865A\u3002</p><p>\u62A5\u4EF7\u524D\u8981\u4E86\u89E3\u4F60\u5C06\u8981\u505A\u7684\u662F\u4EC0\u4E48\uFF0C\u9700\u8981\u82B1\u591A\u4E45\u3002\u5BA2\u6237\u9700\u8981\u88C5\u73AF\u5883\u5417\uFF0C\u5982\u679C\u9700\u8981\u4F60\u9884\u8BA1\u82B1\u591A\u4E45\u641E\u5B9A\u7B49\u7B49......</p><h3 id="\u4F5C\u606F" tabindex="-1"><a class="header-anchor" href="#\u4F5C\u606F" aria-hidden="true">#</a> \u4F5C\u606F</h3><p>\u63A5\u5355\u4F5C\u4E3A\u517C\u804C\uFF0C\u5728\u4E1A\u4F59\u65F6\u95F4\u62BD\u7A7A\u505A\u4E00\u4E9B\u5C0F\u5355\u5B50\u3002\u65F6\u95F4\u5F88\u5BB9\u6613\u628A\u63A7\u3002\u4F46\u628A\u8FD9\u4E2A\u5F53\u6210\u5168\u804C\u4E4B\u540E\uFF0C\u5C31\u4E0D\u53EF\u540C\u65E5\u800C\u8BED\u3002\u5047\u5982\u4F60\u548C\u6211\u4E00\u6837\uFF0C\u5E76\u4E0D\u662F\u8DDF\u5BB6\u91CC\u4EBA\u4F4F\u5728\u4E00\u8D77\uFF0C\u800C\u662F\u5728\u5916\u79DF\u623F\uFF0C\u6CA1\u6709\u516C\u53F8\u7684\u671D\u4E5D\u665A\u4E94\uFF08996\uFF09\uFF0C\u4F60\u7684\u65F6\u95F4\u6982\u5FF5\u53EF\u80FD\u4F1A\u6162\u6162\u7F3A\u5931\uFF0C\u4F60\u7684\u6240\u6709\u65F6\u95F4\u90FD\u9700\u8981\u4F60\u6765\u638C\u63A7\uFF08\u867D\u7136\u5BF9\u4E8E\u81EA\u5F8B\u7684\u4EBA\uFF0C\u8FD9\u53EF\u80FD\u4E0D\u662F\u4EC0\u4E48\u95EE\u9898\uFF09\u3002</p><p>\u5728\u7ECF\u8FC7\u4E00\u4E2A\u5BA2\u6237\u8FDE\u7EED\u4E24\u4E09\u5929\u7684\u9700\u6C42\uFF0C\u6BCF\u5929\u90FD\u5FD9\u5230\u51CC\u6668\u56DB\u4E94\u70B9\u624D\u7761\u3002\u5F7B\u5E95\u628A\u6211\u539F\u672C\u5C31\u4E0D\u5E73\u8861\u7684\u4F5C\u606F\u7ED9\u6405\u6210\u7CCA\u3002\u4E4B\u540E\u7684\u51E0\u5929\uFF0C\u6211\u7684\u4F5C\u606F\u90FD\u65E0\u6CD5\u5B8C\u6574\u8C03\u6574\u8FC7\u6765\u3002\u4E8E\u662F\u6211\u7ED9\u81EA\u5DF1\u653E\u4E86\u4E00\u5468\u7684\u5047\u671F\uFF0C\u56DE\u4E86\u4E00\u8D9F\u5BB6\uFF0C\u5728\u5BB6\u91CC\u7684\u4F5C\u606F\u53C8\u6062\u590D\u6B63\u5E38\uFF0C\u4E8E\u662F\u624D\u56DE\u6765\u7EE7\u7EED\u5DE5\u4F5C\u3002\u73B0\u5728\u5DF2\u7ECF\u4F5C\u606F\u6BD4\u8F83\u89C4\u5F8B\u4E86\u3002</p><p>\u4F5C\u606F\u89C4\u5F8B\uFF0C\u591A\u51FA\u53BB\u8D70\u8D70\uFF0C\u4E0D\u8981\u4E45\u5750\uFF0C\u6CA1\u6709\u5DE5\u4F5C\u4E4B\u540E\uFF0C\u4F60\u60F3\u5E72\u4EC0\u4E48\uFF0C\u968F\u65F6\u53BB\u5E72\u5427\u3002</p><p>\u80FD\u770B\u5230\u8FD9\u7684\uFF0C\u4F60\u53EF\u80FD\u6216\u591A\u6216\u5C11\u662F\u6709\u8FD9\u65B9\u9762\u7684\u8003\u8651\uFF0C\u4E0D\u5BB9\u6613\u554A\uFF0C\u52A0\u6CB9\u5427\u3002</p><p>\u95F2\u6687\u4E4B\u4F59\uFF0C\u4E5F\u6709\u4E86\u65F6\u95F4\u53BB\u4E30\u5BCC\u81EA\u5DF1\u7684\u9879\u76EE\u7ECF\u5386\uFF0C\u4E8E\u662F\u5F00\u59CB\u7528 electron + react + nodejs + rust \u5F00\u53D1\u4E00\u4E2A\u53BB\u4E2D\u5FC3\u5316\u52A0\u5BC6\u793E\u4EA4\u8F6F\u4EF6\uFF0C\u5982\u679C\u611F\u5174\u8DA3\u7684\u53EF\u4EE5\u52A0\u5165\u6211 \uFF5E</p><p>btw\uFF1A\u5982\u679C\u6709\u597D\u7684\u5DE5\u4F5C\u673A\u4F1A\u6B22\u8FCE\u8054\u7CFB\u6211\uFF08Rust\uFF09\uFF0C\u76EE\u524D\u4F4F\u5728\u5E7F\u5DDE\uFF0C\u6253\u7B97\u660E\u5E74\u642C\u53BB\u6B66\u6C49\u3002\u5982\u679C\u662F\u8FDC\u7A0B\u7684\u8BDD\u4E5F\u53EF\u4EE5\u3002</p><hr><blockquote><p>\u539F\u6587\u94FE\u63A5\uFF1Ahttps://juejin.cn/post/7032317937339858952</p></blockquote><p>\u5206\u4EAB\u7684\u6700\u540E\uFF0C\u4E8C\u54E5\u7B80\u5355\u6765\u8BF4\u4E24\u53E5\u3002</p><p>\u5BF9\u4E8E\u7A0B\u5E8F\u5458\u6765\u8BF4\uFF0C\u8DF3\u69FD\u8FD8\u662F\u5F97\u51C6\u5907 fallback \u65B9\u6848\uFF0C\u8D77\u7801 offer \u53EF\u4EE5\u51C6\u5907\u591A\u51E0\u4E2A\u518D\u8DF3\u69FD\u3002\u5982\u679C\u4E00\u4E0D\u5C0F\u5FC3 gap \u4E86\uFF0C 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not your fault \u3002</li><li>\u5408\u4F5C\u5B8C\u4E4B\u540E\uFF0C\u5982\u679C\u4F60\u548C\u5BA2\u6237\u90FD\u5F88\u6EE1\u610F\u5BF9\u65B9\u7684\u8BDD\uFF0C\u4E0D\u59A8\u52A0\u4E2A\u597D\u53CB\uFF0C\u57FA\u4E8E\u4FE1\u4EFB\u7684\u57FA\u7840\u4E0A\uFF0C\u5982\u679C\u4EE5\u540E\u6709\u9700\u6C42\u4F60\u4EEC\u53EF\u4EE5\u76F4\u63A5\u8054\u7CFB\u3002</li></ul>',39),t=[l];function h(o,d){return a(),p("div",null,t)}var s=e(r,[["render",h],["__file","waibao-1geyue.html.vue"]]);export{s as default};
+import{_ as e}from"./plugin-vue_export-helper.21dcd24c.js";import{o as a,c as p,e as i}from"./app.615e41d8.js";const r={},l=i('<p>\u5927\u5BB6\u597D\uFF0C\u6211\u662F\u4E8C\u54E5\u5440\uFF01\u6628\u5929\u542C\u4E00\u4E2A\u524D\u540C\u4E8B\u8BF4\uFF0C\u4ED6\u5728\u516C\u53F8\u8FC7\u5F97\u975E\u5E38\u4E0D\u5F00\u5FC3\uFF0C\u539F\u56E0\u662F\u4ED6\u7684\u4E0A\u7EA7\u88AB\u5904\u5206\u4E86\uFF0C\u5BFC\u81F4\u4ED6\u53D7\u5230\u4E86\u6CE2\u53CA\uFF0C\u6253\u7B97\u88F8\u8F9E\u5168\u804C\u63A5\u5916\u5305\uFF0C\u95EE\u6211\u9760\u8C31\u4E0D\u9760\u8C31\uFF1F\u540E\u9762\u627E\u673A\u4F1A\u7ED9\u5927\u5BB6\u804A\u804A\u6211\u7684\u770B\u6CD5\u3002</p><p>\u4ECA\u5929\u5148\u6765\u5206\u4EAB\u4E00\u4E2A\u7A0B\u5E8F\u5458\u88F8\u8F9E\u63A5\u5355\u7684\u6545\u4E8B\uFF0C\u4E0D\u8FC7\uFF0C\u4ED6\u63A5\u5355\u65F6\u95F4\u6BD4\u8F83\u77ED\uFF0C\u5927\u6982\u4E00\u4E2A\u6708\u3002\u5168\u804C\u63A5\u5355\u524D\uFF0C\u4ED6\u867D\u7136\u5DE5\u4F5C\u4E86\u4E00\u5E74\u6709\u4F59\uFF0C\u4F46\u662F\u9879\u76EE\u7ECF\u5386\u8FD8\u662F\u6BD4\u8F83\u5C11\u3002\u4ED6\u5728\u8FD9\u4E00\u4E2A\u6708\u7684\u63A5\u5355\u4E2D\uFF1A</p><ul><li>\u63A5\u89E6\u4E86\u6211\u975E\u5E38\u964C\u751F\u7684 php\uFF0Cpython\uFF1B</li><li>\u7528 react + django \u5199\u4E86\u4E00\u4E2A\u7B80\u5355\u7684\u793E\u4EA4\u7F51\u7AD9\uFF1B</li><li>\u7528 heroku \u90E8\u7F72\u4E86\u4E24\u4E2A\u7F51\u7AD9\uFF1B\u63A5\u89E6\u4E86\u4EE5\u592A\u574A\u52A0\u5BC6\uFF1B</li><li>\u7528 css3d \u6784\u5EFA\u4E86\u5723\u8BDE\u8282\u7684 3d \u573A\u666F\uFF0C\u5305\u62EC\u4E86\u7528 PS \u753B\u56FE\uFF1B</li><li>\u63A5\u89E6\u4E86\u7092\u80A1\u8F6F\u4EF6\u5F00\u53D1\uFF08vue\uFF09\uFF0C\u5B66\u4F1A\u4E86\u770B k \u7EBF\uFF1B</li><li>\u63A5\u89E6\u4E86 google group varint \u538B\u7F29\u7B97\u6CD5\uFF1B</li><li>\u505A\u4E86\u4E2A\u7F51\u9875\u5E2E\u7559\u5B66\u751F\u5728\u56FD\u5916\u5BA3\u4F20\u6566\u714C\u6587\u5316......</li></ul><p>\u603B\u7684\u6765\u8BF4\uFF0C\u5185\u5BB9\u5F88\u4E30\u5BCC\uFF0C\u867D\u7136\u90FD\u4E0D\u662F\u4EC0\u4E48\u5927\u9700\u6C42\u3002\u7531\u4E8E\u4ED6\u5B66\u4E60\u4E1C\u897F\u6BD4\u8F83\u5FEB\uFF0Cdebug \u80FD\u529B\u8FD8\u884C\uFF0C\u539F\u672C\u53EA\u6253\u7B97\u63A5\u524D\u7AEF\u7684\u5355\u5B50\uFF0C\u4F46\u662F\u603B\u662F\u5728\u81EA\u5DF1\u7684\u80FD\u529B\u8FB9\u754C\u5F98\u5F8A\uFF0C\u4E5F\u5C31\u5B66\u4F1A\u4E86\u89C1\u62DB\u62C6\u62DB\uFF0C\u505A\u4E00\u4E9B\u5176\u4ED6\u8BED\u8A00\u6216\u6846\u67B6\u7684\u5DE5\u4F5C\u3002</p><p>\u4E0B\u9762\u5C31\u7531\u4ED6\u7684\u7B2C\u4E00\u89C6\u89D2\u6765\u5206\u4EAB\u4E00\u4E0B\u5168\u804C\u63A5\u5355\u4E00\u4E2A\u6708\u7684\u611F\u53D7\uFF0C\u5E0C\u671B\u80FD\u7ED9\u5C0F\u4F19\u4F34\u4EEC\u4E00\u70B9\u70B9\u542F\u53D1\u548C\u5E2E\u52A9</p><hr><h3 id="\u80CC\u666F" tabindex="-1"><a class="header-anchor" href="#\u80CC\u666F" aria-hidden="true">#</a> \u80CC\u666F</h3><p>\u9119\u4EBA\u672C\u79D1\u6BD5\u4E1A\u4E00\u5E74\u6709\u4F59\uFF0C\u8BA1\u7B97\u673A\u4E13\u4E1A\u3002\u5168\u6808\u5DE5\u7A0B\u5E08\uFF0C\u4F46\u66F4\u559C\u6B22\u524D\u7AEF\u7684\u5DE5\u4F5C\uFF0C\u4E8E\u662F\u5728\u4E00\u5BB6\u6E38\u620F\u516C\u53F8\u4EFB\u804C\u524D\u7AEF\u5DE5\u4F5C\u3002\u5728\u8FD9\u4E2A\u5185\u5377\u7684\u65F6\u4EE3\uFF0C\u8EAB\u5904\u4E00\u7EBF\u57CE\u5E02\uFF0C\u6765\u81EA\u5168\u56FD\u5404\u5730\u7684\u4F18\u79C0\u5B66\u9662/\u57F9\u8BAD\u673A\u6784\u4EBA\u624D\u8F88\u51FA\uFF0C\u6D8C\u5165\u5E02\u573A\uFF0C\u7ADE\u4E89\u6FC0\u70C8\uFF0C\u5404\u5927\u516C\u53F8\u5E76\u9A71\u4E89\u5148\u7528\u4E30\u539A\u7684\u85AA\u6C34\uFF0C\u4F18\u6E25\u7684\u5F85\u9047\u53BB\u5438\u5F15\u66F4\u4F18\u79C0\u4EBA\u624D\u5165\u804C\u3002</p><p>\u4F46\u662F\uFF0C\u73B0\u5728\u5DF2\u7ECF\u8FC7\u4E86 \u201D\u4E0D\u4F1A\u4F46\u6211\u4F1A\u5B66\u201C 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\u52A8\u673A</h3><p>\u6839\u636E\u524D\u9762\u80CC\u666F\u7684\u4ECB\u7ECD\uFF0C\u5728\u4E0A\u4E00\u4EFD\u5DE5\u4F5C\u51C6\u5907\u79BB\u804C\u524D\uFF0C\u6211\u5DF2\u7ECF\u627E\u597D\u4E0B\u5BB6\u3002\u5E26\u7740\u7F8E\u597D\u7684\u671F\u5F85\u8DF3\u69FD\u8FDB\u5165\u4E4B\u540E\u53D1\u73B0\u4E0E\u60F3\u8C61\u4E4B\u4E2D\u76F8\u5DEE\u751A\u8FDC\uFF0C\u9664\u4E86\u85AA\u8D44\u6BD4\u4E4B\u524D\u9AD8\u4E0D\u5C11\uFF0C\u5176\u4F59\u90FD\u5728\u9884\u671F\u4EE5\u4E0B\u3002\u4E8E\u662F\u4FBF\u9009\u62E9\u4E86\u88F8\u8F9E\uFF08\u867D\u7136\u5165\u804C\u624B\u7EED\u8FD8\u6CA1\u529E\u5B8C\uFF09\uFF0C\u968F\u540E\u867D\u7136\u4E5F\u627E\u4E86\u51E0\u5BB6\uFF0C\u4F46\u662F 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class="header-anchor" href="#\u6536\u5165" aria-hidden="true">#</a> \u6536\u5165</h3><p>\u5927\u5BB6\u6700\u770B\u91CD\u7684\u53EF\u80FD\u5C31\u662F\u6536\u5165\u95EE\u9898\u4E86\uFF0C\u672C\u6587\u6CA1\u6709\u7F51\u4E0A\u8BF4\u7684\u6708\u5165\u5927\u51E0\u4E07\u8FD9\u4E48\u5938\u5F20\u3002\u4ECE\u4E0A\u4E2A\u6708\u5F00\u59CB\u517C\u804C\uFF0C\u5927\u6982\u5DE5\u4F5C\u4E86 20 \u51E0\u5929\uFF0C\u8D5A\u4E86 11K+\uFF0C\u4E0D\u8FC7\u7531\u4E8E\u6709\u4E2D\u4ECB\u8D39\u7684\u5B58\u5728\uFF0C\u5B9E\u9645\u5230\u624B\u4E5F\u5C31 9 \uFF5E 10K\u3002\u4E0D\u8FC7\u5BF9\u4E8E\u4E00\u4EFD\u5728\u5BB6\u7684\u517C\u804C\u5DE5\u4F5C\uFF0C\u8FD9\u4E2A\u6536\u5165\u8FD8\u662F\u8FC7\u5F97\u53BB\u3002</p><p>\u4E0E\u4E00\u4EFD\u7A33\u5B9A\u7684\u5DE5\u4F5C\u4E0D\u540C\uFF0C\u81EA\u5DF1\u63A5\u5355\u4E0D\u5B58\u5728\u4E0A\u73ED\u6478\u9C7C\u8FD9\u4E2A\u6982\u5FF5\u3002\u4E0A\u73ED\u6478\u9C7C\u6478\u4E00\u4E2A\u6708\uFF0C\u4F60\u7684\u5DE5\u8D44\u8FD8\u662F\u4E00\u6837\u7167\u53D1\uFF0C\u540C\u65F6\u4F60\u8FD8\u8981\u8003\u8651\u8282\u5047\u65E5\uFF0C\u4E94\u9669\u4E00\u91D1\u7B49\u7B49\u3002</p><h3 id="\u62A5\u4EF7" tabindex="-1"><a class="header-anchor" href="#\u62A5\u4EF7" aria-hidden="true">#</a> \u62A5\u4EF7</h3><p>\u4E00\u822C\u6765\u8BF4\u62A5\u4EF7\u662F\u6309\u7167\u8FD9\u4E2A\u516C\u5F0F\u6765\u7B97\uFF1A</p><p>\u62A5\u4EF7=\u65E5\u85AA \u2217 \u5DE5\u671F\u62A5\u4EF7 = \u65E5\u85AA * \u5DE5\u671F\u62A5\u4EF7=\u65E5\u85AA \u2217 \u5DE5\u671F</p><p>\u4E0D\u8FC7\u4E5F\u6CA1\u5FC5\u8981\u5B8C\u5168\u6309\u7167\u8FD9\u4E2A\u6807\u51C6\uFF0C\u6211\u7684\u6807\u51C6\u5F88\u7B80\u5355\uFF1A\u4E0D\u4F1A\u56E0\u4E3A\u4EF7\u683C\u592A\u4F4E\u800C\u611F\u5230\u540E\u6094\uFF0C\u4E5F\u4E0D\u4F1A\u56E0\u4E3A\u4EF7\u683C\u592A\u9AD8\u800C\u611F\u5230\u5FC3\u865A\u3002</p><p>\u62A5\u4EF7\u524D\u8981\u4E86\u89E3\u4F60\u5C06\u8981\u505A\u7684\u662F\u4EC0\u4E48\uFF0C\u9700\u8981\u82B1\u591A\u4E45\u3002\u5BA2\u6237\u9700\u8981\u88C5\u73AF\u5883\u5417\uFF0C\u5982\u679C\u9700\u8981\u4F60\u9884\u8BA1\u82B1\u591A\u4E45\u641E\u5B9A\u7B49\u7B49......</p><h3 id="\u4F5C\u606F" tabindex="-1"><a class="header-anchor" href="#\u4F5C\u606F" aria-hidden="true">#</a> 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electron + react + nodejs + rust \u5F00\u53D1\u4E00\u4E2A\u53BB\u4E2D\u5FC3\u5316\u52A0\u5BC6\u793E\u4EA4\u8F6F\u4EF6\uFF0C\u5982\u679C\u611F\u5174\u8DA3\u7684\u53EF\u4EE5\u52A0\u5165\u6211 \uFF5E</p><p>btw\uFF1A\u5982\u679C\u6709\u597D\u7684\u5DE5\u4F5C\u673A\u4F1A\u6B22\u8FCE\u8054\u7CFB\u6211\uFF08Rust\uFF09\uFF0C\u76EE\u524D\u4F4F\u5728\u5E7F\u5DDE\uFF0C\u6253\u7B97\u660E\u5E74\u642C\u53BB\u6B66\u6C49\u3002\u5982\u679C\u662F\u8FDC\u7A0B\u7684\u8BDD\u4E5F\u53EF\u4EE5\u3002</p><hr><blockquote><p>\u539F\u6587\u94FE\u63A5\uFF1Ahttps://juejin.cn/post/7032317937339858952</p></blockquote><p>\u5206\u4EAB\u7684\u6700\u540E\uFF0C\u4E8C\u54E5\u7B80\u5355\u6765\u8BF4\u4E24\u53E5\u3002</p><p>\u5BF9\u4E8E\u7A0B\u5E8F\u5458\u6765\u8BF4\uFF0C\u8DF3\u69FD\u8FD8\u662F\u5F97\u51C6\u5907 fallback \u65B9\u6848\uFF0C\u8D77\u7801 offer \u53EF\u4EE5\u51C6\u5907\u591A\u51E0\u4E2A\u518D\u8DF3\u69FD\u3002\u5982\u679C\u4E00\u4E0D\u5C0F\u5FC3 gap \u4E86\uFF0C 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not your fault \u3002</li><li>\u5408\u4F5C\u5B8C\u4E4B\u540E\uFF0C\u5982\u679C\u4F60\u548C\u5BA2\u6237\u90FD\u5F88\u6EE1\u610F\u5BF9\u65B9\u7684\u8BDD\uFF0C\u4E0D\u59A8\u52A0\u4E2A\u597D\u53CB\uFF0C\u57FA\u4E8E\u4FE1\u4EFB\u7684\u57FA\u7840\u4E0A\uFF0C\u5982\u679C\u4EE5\u540E\u6709\u9700\u6C42\u4F60\u4EEC\u53EF\u4EE5\u76F4\u63A5\u8054\u7CFB\u3002</li></ul>',39),t=[l];function h(o,d){return a(),p("div",null,t)}var s=e(r,[["render",h],["__file","waibao-1geyue.html.vue"]]);export{s as default};
diff --git a/dist/assets/wangluo.html.bd9e0045.js b/dist/assets/wangluo.html.bf2e0885.js
similarity index 99%
rename from dist/assets/wangluo.html.bd9e0045.js
rename to dist/assets/wangluo.html.bf2e0885.js
index 22a1c251..43df7f63 100644
--- a/dist/assets/wangluo.html.bd9e0045.js
+++ b/dist/assets/wangluo.html.bf2e0885.js
@@ -1,4 +1,4 @@
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aria-hidden="true">#</a> OSI\u4E03\u5C42\u6A21\u578B</h2><p><strong>\u7269\u7406\u5C42</strong></p><p>\u9996\u5148\u89E3\u51B3\u4E24\u53F0\u7269\u7406\u673A\u4E4B\u95F4\u7684\u901A\u4FE1\u9700\u6C42\uFF0C\u5177\u4F53\u5C31\u662F\u673A\u5668A\u5F80\u673A\u5668B\u53D1\u9001\u6BD4\u7279\u6D41\uFF0C\u673A\u5668B\u80FD\u6536\u5230\u6BD4\u7279\u6D41\u3002</p><p>\u7269\u7406\u5C42\u4E3B\u8981\u5B9A\u4E49\u4E86\u7269\u7406\u8BBE\u5907\u7684\u6807\u51C6\uFF0C\u5982\u7F51\u7EBF\u7684\u7C7B\u578B\uFF0C\u5149\u7EA4\u7684\u63A5\u53E3\u7C7B\u578B\uFF0C\u5404\u79CD\u4F20\u8F93\u4ECB\u8D28\u7684\u4F20\u8F93\u901F\u7387\u3002</p><p>\u4E3B\u8981\u4F5C\u7528\u662F\u4F20\u8F93\u6BD4\u7279\u6D41\uFF08<code>0101</code>\u4E8C\u8FDB\u5236\u6570\u636E\uFF09\uFF0C\u5C06\u6BD4\u7279\u6D41\u8F6C\u5316\u4E3A\u7535\u6D41\u5F3A\u5F31\u4F20\u8F93\uFF0C\u5230\u8FBE\u76EE\u7684\u540E\u518D\u8F6C\u5316\u4E3A\u6BD4\u7279\u6D41\uFF0C\u5373\u5E38\u8BF4\u7684\u6570\u6A21\u8F6C\u5316\u548C\u6A21\u6570\u8F6C\u6362\u3002</p><p>\u8FD9\u5C42\u6570\u636E\u53EB\u505A\u6BD4\u7279\u3002<strong>\u7F51\u5361\u5DE5\u4F5C\u5728\u8FD9\u5C42</strong>\u3002</p><p>\u7269\u7406\u5C42\u662FOSI\u4E03\u5C42\u6A21\u578B\u7684\u7269\u7406\u57FA\u7840\uFF0C\u6CA1\u6709\u5B83\u5C31\u8C08\u4E0D\u4E0A\u6570\u636E\u4F20\u8F93\u4E86</p><p>\u7269\u7406\u5C42\u5C31\u662F\u7531\u5B9E\u7269\u6240\u627F\u8F7D\u7684\uFF0C\u6240\u4EE5\u4F5C\u6BD4\u55BB\u7684\u8BDD\uFF0C\u516C\u8DEF\u3001\u6C7D\u8F66\u548C\u98DE\u673A\u7B49\u627F\u8F7D\u8D27\u7269\uFF08\u6570\u636E\uFF09\u7684\u4EA4\u901A\u5DE5\u5177\uFF0C\u5C31\u662F\u7269\u7406\u5C42\u7684\u8C61\u5F81</p><p><strong>\u6570\u636E\u94FE\u8DEF\u5C42</strong></p><p>\u5728\u4F20\u8F93\u6BD4\u7279\u6D41\u7684\u8FC7\u7A0B\u4E2D\uFF0C\u4F1A\u4EA7\u751F\u9519\u4F20\u3001\u6570\u636E\u4F20\u8F93\u4E0D\u5B8C\u6574\u7684\u53EF\u80FD\u3002</p><p>\u6570\u636E\u94FE\u8DEF\u5C42\u5B9A\u4E49\u4E86<strong>\u5982\u4F55\u683C\u5F0F\u5316\u6570\u636E\u8FDB\u884C\u4F20\u8F93</strong>\uFF0C\u4EE5\u53CA\u5982\u4F55\u63A7\u5236\u5BF9\u7269\u7406\u4ECB\u8D28\u7684\u8BBF\u95EE\u3002\u901A\u5E38\u63D0\u4F9B\u9519\u8BEF\u68C0\u6D4B\u548C\u7EA0\u6B63\uFF0C\u4EE5\u786E\u4FDD\u6570\u636E\u4F20\u8F93\u7684\u51C6\u786E\u6027\u3002</p><p>\u672C\u5C42\u5C06\u6BD4\u7279\u6570\u636E\u7EC4\u6210\u5E27\uFF0C\u4EA4\u6362\u673A\u5DE5\u4F5C\u5728\u8FD9\u5C42\uFF0C\u5BF9\u5E27\u89E3\u7801\uFF0C\u5E76\u6839\u636E\u5E27\u4E2D\u5305\u542B\u7684\u4FE1\u606F\u628A\u6570\u636E\u53D1\u9001\u5230\u6B63\u786E\u7684\u63A5\u6536\u65B9\u3002</p><p>\u8BE5\u5C42\u8D1F\u8D23\u7269\u7406\u5C42\u9762\u4E0A\u4E92\u8FDE\u7684\u8282\u70B9\u4E4B\u95F4\u7684\u901A\u4FE1\u4F20\u8F93\u3002\u4F8B\u5982\u4E0E1\u4E2A\u4EE5\u592A\u7F51\u76F8\u8FDE\u7684\u4E24\u4E2A\u8282\u70B9\u95F4\u7684\u901A\u8BAF\u3002</p><p>\u5E38\u89C1\u7684\u534F\u8BAE\u6709 <code>HDLC\u3001PPP\u3001SLIP</code>\u7B49</p><p>\u6570\u636E\u94FE\u8DEF\u5C42\u4F1A\u5C06<code>0\u30011</code>\u5E8F\u5217\u5212\u5206\u4E3A\u5177\u6709\u610F\u4E49\u7684\u6570\u636E\u5E27\u4F20\u9001\u7ED9\u5BF9\u7AEF\uFF08<strong>\u6570\u636E\u5E27\u7684\u751F\u6210\u4E0E\u63A5\u6536</strong>\uFF09</p><p><strong>\u7F51\u7EDC\u5C42</strong></p><p>\u968F\u7740\u7F51\u7EDC\u8282\u70B9\u7684\u4E0D\u65AD\u589E\u52A0\uFF0C\u70B9\u5BF9\u70B9\u901A\u8BAF\u9700\u8981\u901A\u8FC7\u591A\u4E2A\u8282\u70B9\uFF0C\u5982\u4F55\u627E\u5230\u76EE\u6807\u8282\u70B9\uFF0C\u5982\u4F55\u9009\u62E9\u6700\u4F73\u8DEF\u5F84\u6210\u4E3A\u9996\u8981\u9700\u6C42\u3002</p><p>\u7F51\u7EDC\u5C42\u4E3B\u8981\u529F\u80FD\u662F\u5C06\u7F51\u7EDC\u5730\u5740\u8F6C\u5316\u4E3A\u5BF9\u5E94\u7684\u7269\u7406\u5730\u5740\uFF0C\u5E76\u51B3\u5B9A\u5982\u4F55\u5C06\u6570\u636E\u4ECE\u53D1\u9001\u65B9\u8DEF\u7531\u5230\u63A5\u6536\u65B9\u3002</p><p>\u7F51\u7EDC\u5C42\u901A\u8FC7\u7EFC\u5408\u8003\u8651\u53D1\u9001\u4F18\u5148\u6743\u3001\u7F51\u7EDC\u62E5\u585E\u7A0B\u5EA6\u3001\u670D\u52A1\u8D28\u91CF\u4EE5\u53CA\u53EF\u9009\u8DEF\u7531\u7684\u82B1\u8D39\u6765\u51B3\u5B9A\u4ECE\u4E00\u4E2A\u7F51\u7EDC\u4E2D\u8282\u70B9A\u5230\u53E6\u4E00\u4E2A\u7F51\u7EDC\u4E2D\u8282\u70B9B\u7684\u6700\u4F73\u8DEF\u5F84\u3002</p><p>\u7531\u4E8E\u7F51\u7EDC\u5C42\u5904\u7406\u5E76\u667A\u80FD\u6307\u5BFC\u6570\u636E\u4F20\u9001\uFF0C\u8DEF\u7531\u5668\u8FDE\u63A5\u7F51\u7EDC\u9694\u65AD\uFF0C\u6240\u4EE5\u8DEF\u7531\u5668\u5C5E\u4E8E\u7F51\u7EDC\u5C42\u3002</p><p>\u6B64\u5C42\u7684\u6570\u636E\u79F0\u4E4B\u4E3A\u6570\u636E\u5305\u3002\u672C\u5C42\u9700\u8981\u5173\u6CE8\u7684\u534F\u8BAE<code>TCP/IP</code>\u534F\u8BAE\u4E2D\u7684IP\u534F\u8BAE\u3002</p><p>\u7F51\u7EDC\u5C42\u8D1F\u8D23\u5C06\u6570\u636E\u4F20\u8F93\u5230\u76EE\u6807\u5730\u5740\u3002\u76EE\u6807\u5730\u5740\u53EF\u4EE5\u4F7F\u591A\u4E2A\u7F51\u7EDC\u901A\u8FC7\u8DEF\u7531\u5668\u8FDE\u63A5\u800C\u6210\u7684\u67D0\u4E00\u4E2A\u5730\u5740\u3002\u56E0\u6B64\u8FD9\u4E00\u5C42\u4E3B\u8981\u8D1F\u8D23<strong>\u5BFB\u5740\u548C\u8DEF\u7531\u9009\u62E9</strong>\u3002\u4E3B\u8981\u7531 <code>IP\u3001ICMP</code> \u4E24\u4E2A\u534F\u8BAE\u7EC4\u6210</p><p>\u7F51\u7EDC\u5C42\u5C06\u6570\u636E\u4ECE\u53D1\u9001\u7AEF\u7684\u4E3B\u673A\u53D1\u9001\u5230\u63A5\u6536\u7AEF\u7684\u4E3B\u673A\uFF0C\u4E24\u53F0\u4E3B\u673A\u95F4\u53EF\u80FD\u4F1A\u5B58\u5728\u5F88\u591A\u6570\u636E\u94FE\u8DEF\uFF0C\u4F46\u7F51\u7EDC\u5C42\u5C31\u662F\u8D1F\u8D23\u627E\u51FA\u4E00\u6761\u76F8\u5BF9\u987A\u7545\u7684\u901A\u8DEF\u5C06\u6570\u636E\u4F20\u9012\u8FC7\u53BB\u3002\u4F20\u8F93\u7684\u5730\u5740\u4F7F\u7528\u7684\u662FIP\u5730\u5740\u3002IP\u5730\u5740\u901A\u8FC7\u4E0D\u65AD\u8F6C\u53D1\u5230\u66F4\u8FD1\u7684IP\u5730\u5740\uFF0C\u6700\u7EC8\u53EF\u4EE5\u5230\u8FBE\u76EE\u6807\u5730\u5740</p><p><strong>\u4F20\u8F93\u5C42</strong></p><p>\u968F\u7740\u7F51\u7EDC\u901A\u4FE1\u9700\u6C42\u7684\u8FDB\u4E00\u6B65\u6269\u5927\uFF0C\u901A\u4FE1\u8FC7\u7A0B\u4E2D\u9700\u8981\u53D1\u9001\u5927\u91CF\u7684\u6570\u636E\uFF0C\u5982\u6D77\u91CF\u6587\u4EF6\u4F20\u8F93\uFF0C\u53EF\u80FD\u9700\u8981\u5F88\u957F\u65F6\u95F4\uFF0C\u7F51\u7EDC\u5728\u901A\u4FE1\u7684\u8FC7\u7A0B\u4E2D\u4F1A\u4E2D\u65AD\u5F88\u591A\u6B21\uFF0C\u6B64\u65F6\u4E3A\u4E86\u4FDD\u8BC1\u4F20\u8F93\u5927\u91CF\u6587\u4EF6\u65F6\u7684\u51C6\u786E\u6027\uFF0C\u9700\u8981\u5BF9\u53D1\u9001\u51FA\u53BB\u7684\u6570\u636E\u8FDB\u884C\u5207\u5206\uFF0C\u5207\u5272\u4E3A\u4E00\u4E2A\u4E00\u4E2A\u7684\u6BB5\u843D\uFF08<code>Segement</code>\uFF09\u53D1\u9001\uFF0C\u5176\u4E2D\u4E00\u4E2A\u6BB5\u843D\u4E22\u5931\u662F\u5426\u91CD\u4F20\uFF0C\u6BB5\u843D\u662F\u5426\u6309\u987A\u5E8F\u5230\u8FBE\uFF0C\u662F\u4F20\u8F93\u5C42\u9700\u8981\u8003\u8651\u7684\u95EE\u9898\u3002</p><p>\u4F20\u8F93\u5C42\u89E3\u51B3\u4E86\u4E3B\u673A\u95F4\u7684\u6570\u636E\u4F20\u8F93\uFF0C\u6570\u636E\u95F4\u7684\u4F20\u8F93\u53EF\u4EE5\u662F\u4E0D\u540C\u7F51\u7EDC\uFF0C\u5E76\u4E14\u4F20\u8F93\u5C42\u89E3\u51B3\u4E86<strong>\u4F20\u8F93\u8D28\u91CF</strong>\u7684\u95EE\u9898\u3002</p><p>\u4F20\u8F93\u5C42\u9700\u8981\u5173\u6CE8\u7684\u534F\u8BAE\u6709TCP/IP\u534F\u8BAE\u4E2D\u7684<code>TCP</code>\u534F\u8BAE\u548C<code>UDP</code>\u534F\u8BAE\u3002</p><p><strong>\u4F1A\u8BDD\u5C42</strong></p><p>\u81EA\u52A8\u6536\u53D1\u5305\uFF0C\u81EA\u52A8\u5BFB\u5740\u3002</p><p>\u4F1A\u8BDD\u5C42\u4F5C\u7528\u662F<strong>\u8D1F\u8D23\u5EFA\u7ACB\u548C\u65AD\u5F00\u901A\u4FE1\u8FDE\u63A5</strong>\uFF0C\u4F55\u65F6\u5EFA\u7ACB\uFF0C\u65AD\u5F00\u8FDE\u63A5\u4EE5\u53CA\u4FDD\u6301\u591A\u4E45\u7684\u8FDE\u63A5\u3002\u5E38\u89C1\u7684\u534F\u8BAE\u6709 <code>ADSP\u3001RPC</code> \u7B49</p><p><strong>\u8868\u793A\u5C42</strong></p><p>Linux\u7ED9WIndows\u53D1\u5305\uFF0C\u4E0D\u540C\u7CFB\u7EDF\u8BED\u6CD5\u4E0D\u4E00\u81F4\uFF0C\u5982exe\u4E0D\u80FD\u5728<code>Linux</code>\u4E0B\u6267\u884C\uFF0Cshell\u4E0D\u80FD\u5728Windows\u4E0D\u80FD\u76F4\u63A5\u8FD0\u884C\u3002\u4E8E\u662F\u9700\u8981\u8868\u793A\u5C42\u3002</p><p>\u89E3\u51B3<strong>\u4E0D\u540C\u7CFB\u7EDF\u4E4B\u95F4\u901A\u4FE1\u8BED\u6CD5\u95EE\u9898</strong>\uFF0C\u5728\u8868\u793A\u5C42\u6570\u636E\u5C06\u6309\u7167\u7F51\u7EDC\u80FD\u7406\u89E3\u7684\u65B9\u6848\u8FDB\u884C\u683C\u5F0F\u5316\uFF0C\u683C\u5F0F\u5316\u56E0\u6240\u4F7F\u7528\u7F51\u7EDC\u7684\u4E0D\u540C\u800C\u4E0D\u540C\u3002</p><p>\u5B83\u4E3B\u8981\u8D1F\u8D23\u6570\u636E\u683C\u5F0F\u7684\u8F6C\u6362\u3002\u5177\u4F53\u6765\u8BF4\uFF0C\u5C31\u662F\u8BB2\u8BBE\u5907\u56FA\u6709\u7684\u6570\u636E\u683C\u5F0F\u8F6C\u6362\u4E3A\u7F51\u7EDC\u6807\u51C6\u683C\u5F0F\u3002\u5E38\u89C1\u7684\u534F\u8BAE\u6709<code>ASCII\u3001SSL/TLS</code> \u7B49</p><p><strong>\u5E94\u7528\u5C42</strong></p><p>\u89C4\u5B9A\u53D1\u9001\u65B9\u548C\u63A5\u6536\u65B9\u5FC5\u987B\u4F7F\u7528\u4E00\u4E2A\u56FA\u5B9A\u957F\u5EA6\u7684\u6D88\u606F\u5934\uFF0C\u6D88\u606F\u5934\u5FC5\u987B\u4F7F\u7528\u67D0\u79CD\u56FA\u5B9A\u7684\u7EC4\u6210\uFF0C\u6D88\u606F\u5934\u4E2D\u5FC5\u987B\u8BB0\u5F55\u6D88\u606F\u4F53\u7684\u957F\u5EA6\u7B49\u4FE1\u606F\uFF0C\u65B9\u4FBF\u63A5\u6536\u65B9\u6B63\u786E\u89E3\u6790\u53D1\u9001\u65B9\u53D1\u9001\u7684\u6570\u636E\u3002</p><p>\u5E94\u7528\u5C42\u65E8\u5728\u66F4<strong>\u65B9\u4FBF\u5E94\u7528\u4ECE\u7F51\u7EDC\u4E2D\u63A5\u6536\u7684\u6570\u636E</strong>\uFF0C\u91CD\u70B9\u5173\u6CE8<code>TCP/IP</code>\u534F\u8BAE\u4E2D\u7684HTTP\u534F\u8BAE</p><p>\u56DB\u5C42\u4F20\u8F93\u5C42\u6570\u636E\u88AB\u79F0\u4F5C<strong>\u6BB5</strong>\uFF08Segments\uFF09\uFF1B</p><p>\u4E09\u5C42\u7F51\u7EDC\u5C42\u6570\u636E\u88AB\u79F0\u505A<strong>\u5305</strong>\uFF08Packages\uFF09\uFF1B</p><p>\u4E8C\u5C42\u6570\u636E\u94FE\u8DEF\u5C42\u65F6\u6570\u636E\u88AB\u79F0\u4E3A<strong>\u5E27</strong>\uFF08Frames\uFF09\uFF1B</p><p>\u4E00\u5C42\u7269\u7406\u5C42\u65F6\u6570\u636E\u88AB\u79F0\u4E3A<strong>\u6BD4\u7279\u6D41</strong>\uFF08Bits\uFF09\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-d1fdc5fc-c955-4591-9c95-e297a64eccdc.png" alt=""></p><h2 id="tcp\u548Cip\u6A21\u578B" tabindex="-1"><a class="header-anchor" href="#tcp\u548Cip\u6A21\u578B" aria-hidden="true">#</a> TCP\u548CIP\u6A21\u578B</h2><p>OSI\u6A21\u578B\u6CE8\u91CD\u901A\u4FE1\u534F\u8BAE\u5FC5\u8981\u7684\u529F\u80FD\uFF1BTCP/IP\u66F4\u5F3A\u8C03\u5728\u8BA1\u7B97\u673A\u4E0A\u5B9E\u73B0\u534F\u8BAE\u5E94\u8BE5\u5F00\u53D1\u54EA\u79CD\u7A0B\u5E8F</p><p><strong>TCP/IP\u5212\u5206\u4E86\u56DB\u5C42\u7F51\u7EDC\u6A21\u578B</strong></p><ul><li>\u7B2C\u4E00\u5C42\uFF1A\u5E94\u7528\u5C42\uFF0C\u4E3B\u8981\u6709\u8D1F\u8D23web\u6D4F\u89C8\u5668\u7684HTTP\u534F\u8BAE\uFF0C \u6587\u4EF6\u4F20\u8F93\u7684FTP\u534F\u8BAE\uFF0C\u8D1F\u8D23\u7535\u5B50\u90AE\u4EF6\u7684SMTP\u534F\u8BAE\uFF0C\u8D1F\u8D23\u57DF\u540D\u7CFB\u7EDF\u7684DNS\u7B49</li><li>\u7B2C\u4E8C\u5C42\uFF1A\u4F20\u8F93\u5C42\uFF0C\u4E3B\u8981\u662F\u6709<strong>\u53EF\u9760\u4F20\u8F93</strong>\u7684TCP\u534F\u8BAE\uFF0C\u7279\u522B<strong>\u9AD8\u6548</strong>\u7684UDP\u534F\u8BAE\u3002\u4E3B\u8981\u8D1F\u8D23\u4F20\u8F93\u5E94\u7528\u5C42\u7684\u6570\u636E\u5305\u3002</li><li>\u7B2C\u4E09\u5C42\uFF1A\u7F51\u7EDC\u5C42\uFF0C\u4E3B\u8981\u662FIP\u534F\u8BAE\u3002\u4E3B\u8981\u8D1F\u8D23\u5BFB\u5740\uFF08\u627E\u5230\u76EE\u6807\u8BBE\u5907\u7684\u4F4D\u7F6E\uFF09</li><li>\u7B2C\u56DB\u5C42\uFF1A\u6570\u636E\u94FE\u8DEF\u5C42\uFF0C\u4E3B\u8981\u662F\u8D1F\u8D23\u8F6C\u6362\u6570\u5B57\u4FE1\u53F7\u548C\u7269\u7406\u4E8C\u8FDB\u5236\u4FE1\u53F7\u3002</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-fa4a4d20-f0db-4ba7-a31e-7772f2f132a8.png" alt=""></p><p><strong>\u56DB\u5C42\u7F51\u7EDC\u534F\u8BAE\u7684\u4F5C\u7528</strong></p><ul><li>\u53D1\u9001\u7AEF\u662F\u7531\u4E0A\u81F3\u4E0B\uFF0C\u628A\u4E0A\u5C42\u6765\u7684\u6570\u636E\u5728\u5934\u90E8\u52A0\u4E0A\u5404\u5C42\u534F\u8BAE\u7684\u6570\u636E\uFF08\u90E8\u9996\uFF09\u518D\u4E0B\u53D1\u7ED9\u4E0B\u5C42\u3002</li><li>\u63A5\u53D7\u7AEF\u5219\u7531\u4E0B\u800C\u4E0A\uFF0C\u628A\u4ECE\u4E0B\u5C42\u63A5\u53D7\u5230\u7684\u6570\u636E\u8FDB\u884C\u89E3\u5BC6\u548C\u53BB\u6389\u5934\u90E8\u7684\u90E8\u9996\u540E\u518D\u53D1\u9001\u7ED9\u4E0A\u5C42\u3002</li><li>\u5C42\u5C42\u52A0\u5BC6\u548C\u89E3\u5BC6\u540E\uFF0C\u5E94\u7528\u5C42\u6700\u7EC8\u62FF\u5230\u4E86\u9700\u8981\u7684\u6570\u636E\u3002</li></ul><p><strong>\u4E3E\u4E2A\u4F8B\u5B50\uFF1A</strong></p><p>\u6211\u4EEC\u9700\u8981\u53D1\u9001\u4E00\u4E2A<strong>index.html</strong>\u3002</p><p>\u4E24\u53F0\u7535\u8111\u5728\u5E94\u7528\u5C42\u90FD\u4F7F\u7528HTTP\u534F\u8BAE\uFF08\u5373\u90FD\u4F7F\u7528\u6D4F\u89C8\u5668\uFF09\u3002</p><p>\u5728\u4F20\u8F93\u5C42\uFF0CTCP\u534F\u8BAE\u4F1A\u5C06HTTP\u534F\u8BAE\u53D1\u9001\u7684\u6570\u636E\u770B\u4F5C\u4E00\u4E2A\u6570\u636E\u5305\uFF0C\u5E76\u5728\u8FD9\u4E2A\u6570\u636E\u5305\u524D\u9762\u52A0\u4E0ATCP\u5305\u7684\u4E00\u90E8\u5206\u4FE1\u606F\uFF08\u90E8\u9996\uFF09</p><p>\u5728\u7F51\u7EDC\u5C42\uFF0CIP\u534F\u8BAE\u4F1A\u5C06TCP\u534F\u8BAE\u8981\u53D1\u9001\u7684\u6570\u636E\u770B\u4F5C\u4E00\u4E2A\u6570\u636E\u5305\uFF0C\u540C\u6837\u7684\u5728\u8FD9\u4E2A\u6570\u636E\u5305\u524D\u7AEF\u52A0\u4E0AIP\u534F\u8BAE\u7684\u90E8\u9996</p><p>\u5728\u6570\u636E\u94FE\u8DEF\u5C42\uFF0C\u5BF9\u5E94\u7684\u534F\u8BAE\u4E5F\u4F1A\u5728IP\u6570\u636E\u5305\u524D\u7AEF\u52A0\u4E0A\u4EE5\u592A\u7F51\u7684\u90E8\u9996\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-1d3ce227-fd77-4b95-89dd-aeb786bb4b9e.png" alt=""></p><p>\u6E90\u8BBE\u5907\u548C\u76EE\u6807\u8BBE\u5907\u901A\u8FC7\u7F51\u7EBF\u8FDE\u63A5\uFF0C\u5C31\u53EF\u4EE5\u901A\u8FC7\u7269\u7406\u5C42\u7684\u4E8C\u8FDB\u5236\u4F20\u8F93\u6570\u636E\u3002</p><p>\u6570\u636E\u94FE\u8DEF\u5C42\uFF0C\u4F1A\u4F7F\u7528\u5BF9\u5E94\u7684\u534F\u8BAE\u627E\u5230\u7269\u7406\u5C42\u7684\u4E8C\u8FDB\u5236\u6570\u636E\uFF0C\u89E3\u7801\u5F97\u5230\u4EE5\u592A\u7F51\u7684\u90E8\u9996\u4FE1\u606F\u548C\u5BF9\u5E94\u7684IP\u6570\u636E\u5305\uFF0C\u518D\u5C06IP\u6570\u636E\u5305\u4F20\u7ED9\u4E0A\u5C42\u7684\u7F51\u7EDC\u5C42\u3002</p><p>\u6570\u636E\u94FE\u8DEF\u5C42&gt;\u7F51\u7EDC\u5C42&gt;\u4F20\u8F93\u5C42&gt;\u5E94\u7528\u5C42\uFF0C\u4E00\u5C42\u5C42\u7684\u89E3\u7801\uFF0C\u6700\u540E\u5C31\u53EF\u4EE5\u5728\u6D4F\u89C8\u5668\u4E2D\u5F97\u5230\u76EE\u6807\u8BBE\u5907\u4F20\u9001\u8FC7\u6765\u7684<strong>index.html</strong>\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-731f7daa-1b47-4191-828f-c6e54d650604.png" alt=""></p><p><strong>TCP/IP\u534F\u8BAE\u65CF</strong></p><p>\u4ECE\u5B57\u9762\u610F\u4E49\u4E0A\u6765\u8BB2\uFF0CTCP/IP\u662F\u6307<strong>\u4F20\u8F93\u5C42</strong>\u7684TCP\u534F\u8BAE\u548C<strong>\u7F51\u7EDC\u5C42</strong>\u7684IP\u534F\u8BAE\u3002</p><p>\u5B9E\u9645\u4E0A\uFF0CTCP/IP\u53EA\u662F\u5229\u7528 IP \u8FDB\u884C\u901A\u4FE1\u65F6\u6240\u5FC5\u987B\u7528\u5230\u7684\u534F\u8BAE\u7FA4\u7684\u7EDF\u79F0\u3002</p><p>\u5177\u4F53\u6765\u8BF4\uFF0C\u5728\u7F51\u7EDC\u5C42\u662FIP/ICMP\u534F\u8BAE\u3001\u5728\u4F20\u8F93\u5C42\u662FTCP/UDP\u534F\u8BAE\u3001\u5728\u5E94\u7528\u5C42\u662FSMTP\u3001FTP\u3001\u4EE5\u53CA HTTP \u7B49\u3002\u4ED6\u4EEC\u90FD\u5C5E\u4E8E TCP/IP \u534F\u8BAE\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><h2 id="\u7F51\u7EDC\u8BBE\u5907" tabindex="-1"><a class="header-anchor" href="#\u7F51\u7EDC\u8BBE\u5907" aria-hidden="true">#</a> \u7F51\u7EDC\u8BBE\u5907</h2><h3 id="\u4EA4\u6362\u673A" tabindex="-1"><a class="header-anchor" href="#\u4EA4\u6362\u673A" aria-hidden="true">#</a> \u4EA4\u6362\u673A</h3><p>\u4EA4\u6362\u673A\u53EF\u4EE5\u63A5\u5165\u591A\u53F0\u7535\u8111</p><p>\u6BCF\u4E2A\u7535\u8111\u7F51\u5361\u7684 <strong>MAC \u5730\u5740</strong>\u90FD\u662F\u4E0D\u4E00\u6837\u7684\uFF0C\u7535\u8111\u53D1\u9001\u6570\u636E\u65F6\uFF0C\u6570\u636E\u5934\u90E8\u643A\u5E26\u7F51\u5361\u7684 MAC \u5730\u5740\uFF0C\u7528 MAC \u5730\u5740\u6807\u8BC6\u6765\u4E0D\u540C\u7684\u7535\u8111</p><p>\u4EA4\u6362\u673A\u5C31\u53EF\u4EE5\u8BC6\u522B\u6570\u636E\u5934\u90E8\u7684 MAC \u5730\u5740\u6765\u533A\u5206\u4E0D\u540C\u7684\u7535\u8111</p><p>\u4EA4\u6362\u673A\u9664\u4E86\u80FD\u8BC6\u522B\u4E0D\u540C\u7684\u7535\u8111\uFF0C\u8FD8\u9700\u8981\u627E\u5230\u7535\u8111\u8FDE\u63A5\u7684<strong>\u4EA4\u6362\u673A\u7AEF\u53E3</strong>\uFF0C\u624D\u80FD\u987A\u5229\u7684\u628A\u6570\u636E\u4ECE\u76F8\u5E94\u7AEF\u53E3\u53D1\u9001\u51FA\u53BB</p><p>\u4EA4\u6362\u673A\u901A\u8FC7<strong>\u81EA\u5B66\u673A\u5236</strong>\uFF0C\u628A\u5B66\u4E60\u5230\u7684\u8BBE\u5907 MAC \u5730\u5740\u548C\u4EA4\u6362\u673A\u7AEF\u53E3\u53F7\u6DFB\u52A0\u5230 <strong>MAC \u5730\u5740\u8868</strong>\uFF0C\u5E76\u6839\u636E MAC \u5730\u5740\u8868\u8FDB\u884C\u6570\u636E<strong>\u8F6C\u53D1</strong></p><h3 id="\u8DEF\u7531\u5668" tabindex="-1"><a class="header-anchor" href="#\u8DEF\u7531\u5668" aria-hidden="true">#</a> \u8DEF\u7531\u5668</h3><p>\u4EA4\u6362\u673A\u9700\u8981\u8BB0\u5F55\u7684 MAC \u5730\u5740\u8868\u4E5F\u8D8A\u6765\u8D8A\u591A\uFF0C\u9700\u8981\u7684\u4EA4\u6362\u673A\u4E5F\u8D8A\u6765\u8D8A\u591A</p><p>\u4F46\u662F\u4EA4\u6362\u673A\u7684<strong>\u5BB9\u91CF\u548C\u6027\u80FD\u6709\u9650</strong>\uFF0CMAC \u5730\u5740\u8868\u65E0\u6CD5\u8BB0\u5F55\u5168\u4E16\u754C\u7535\u8111\u7684 MAC \u5730\u5740\u548C\u5BF9\u5E94\u7684\u7AEF\u53E3\u53F7\uFF0CMAC \u5730\u5740\u8868\u592A\u5927\u4E5F\u65E0\u6CD5\u5FEB\u901F\u67E5\u627E\u5230\u5BF9\u5E94\u7684 MAC \u5730\u5740\u8868\u9879</p><p>\u4E8E\u662F\u5C31\u6709\u4E86\u4E09\u5C42\u7F51\u7EDC\u8BBE\u5907<strong>\u8DEF\u7531\u5668</strong>\uFF0C\u8DEF\u7531\u5668\u53EF\u4EE5\u628A\u5168\u4E16\u754C\u7684\u7F51\u7EDC\u8FDE\u63A5\u8D77\u6765</p><p>\u5C40\u57DF\u7F51\u5185\u7684\u7F51\u7EDC\u8FDE\u63A5\u53EF\u4EE5\u4F7F\u7528<strong>\u4EA4\u6362\u673A</strong>\uFF0C\u4F8B\u5982\u4E00\u4E2A\u516C\u53F8\u5185\u7684\u7F51\u7EDC\u6216\u8005\u4E00\u4E2A\u6821\u56ED\u5185\u7684\u7F51\u7EDC\u901A\u8FC7\u4EA4\u6362\u673A\u8FDE\u63A5</p><p>\u4E0D\u540C\u533A\u57DF\u7684\u5C40\u57DF\u7F51\u4E92\u8054\u4F7F\u7528<strong>\u8DEF\u7531\u5668</strong></p><blockquote><p>\u90A3\u4E48\u5982\u4F55\u533A\u5206\u4E0D\u540C\u7684\u7F51\u7EDC\u533A\u57DF\u5462\uFF1F\u53C8\u662F\u5982\u4F55\u8DE8\u7F51\u7EDC\u533A\u57DF\u8FDB\u884C\u6570\u636E\u8F6C\u53D1\u7684\u5462\uFF1F</p></blockquote><p>\u8DEF\u7531\u5668\u6709\u591A\u4E2A\u7AEF\u53E3\uFF0C\u5206\u522B\u8FDE\u63A5\u4E0D\u540C\u7684\u7F51\u7EDC\u533A\u57DF\uFF0C\u4E0D\u540C\u7F51\u7EDC\u533A\u57DF\u7684 IP \u5730\u5740<strong>\u7F51\u7EDC\u53F7\u4E0D\u540C</strong></p><p>\u5B83\u901A\u8FC7\u8BC6\u522B\u76EE\u7684 IP \u5730\u5740\u7684<strong>\u7F51\u7EDC\u53F7</strong>\uFF0C\u518D\u6839\u636E<strong>\u8DEF\u7531\u8868</strong>\u8FDB\u884C\u6570\u636E\u8F6C\u53D1</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><h2 id="http" tabindex="-1"><a class="header-anchor" href="#http" aria-hidden="true">#</a> HTTP</h2><p><strong>\u8BF7\u6C42\u65B9\u6CD5</strong></p><p>HTTP1.0 \u5B9A\u4E49\u4E86\u4E09\u79CD\u8BF7\u6C42\u65B9\u6CD5\uFF1A GET, POST \u548C HEAD\u65B9\u6CD5\u3002</p><p>HTTP1.1 \u65B0\u589E\u4E86\u516D\u79CD\u8BF7\u6C42\u65B9\u6CD5\uFF1AOPTIONS\u3001PUT\u3001PATCH\u3001DELETE\u3001TRACE \u548C CONNECT \u65B9\u6CD5\u3002</p><table><thead><tr><th>\u5E8F \u53F7</th><th>\u65B9\u6CD5</th><th>\u63CF\u8FF0</th></tr></thead><tbody><tr><td>1</td><td>GET</td><td>\u8BF7\u6C42\u6307\u5B9A\u7684\u9875\u9762\u4FE1\u606F\uFF0C\u5E76\u8FD4\u56DE\u5B9E\u4F53\u4E3B\u4F53\u3002</td></tr><tr><td>2</td><td>HEAD</td><td>\u7C7B\u4F3C\u4E8E GET \u8BF7\u6C42\uFF0C\u53EA\u4E0D\u8FC7\u8FD4\u56DE\u7684\u54CD\u5E94\u4E2D\u6CA1\u6709\u5177\u4F53\u7684\u5185\u5BB9\uFF0C\u7528\u4E8E\u83B7\u53D6\u62A5\u5934</td></tr><tr><td>3</td><td>POST</td><td>\u5411\u6307\u5B9A\u8D44\u6E90\u63D0\u4EA4\u6570\u636E\u8FDB\u884C\u5904\u7406\u8BF7\u6C42\uFF08\u4F8B\u5982\u63D0\u4EA4\u8868\u5355\u6216\u8005\u4E0A\u4F20\u6587\u4EF6\uFF09\u3002\u6570\u636E\u88AB\u5305\u542B\u5728\u8BF7\u6C42\u4F53\u4E2D\u3002POST \u8BF7\u6C42\u53EF\u80FD\u4F1A\u5BFC\u81F4\u65B0\u7684\u8D44\u6E90\u7684\u5EFA\u7ACB\u548C/\u6216\u5DF2\u6709\u8D44\u6E90\u7684\u4FEE\u6539\u3002</td></tr><tr><td>4</td><td>PUT</td><td>\u4ECE\u5BA2\u6237\u7AEF\u5411\u670D\u52A1\u5668\u4F20\u9001\u7684\u6570\u636E\u53D6\u4EE3\u6307\u5B9A\u7684\u6587\u6863\u7684\u5185\u5BB9\u3002</td></tr><tr><td>5</td><td>DELETE</td><td>\u8BF7\u6C42\u670D\u52A1\u5668\u5220\u9664\u6307\u5B9A\u7684\u9875\u9762\u3002</td></tr><tr><td>6</td><td>CONNECT</td><td>HTTP/1.1 \u534F\u8BAE\u4E2D\u9884\u7559\u7ED9\u80FD\u591F\u5C06\u8FDE\u63A5\u6539\u4E3A\u7BA1\u9053\u65B9\u5F0F\u7684\u4EE3\u7406\u670D\u52A1\u5668\u3002</td></tr><tr><td>7</td><td>OPTIONS</td><td>\u5141\u8BB8\u5BA2\u6237\u7AEF\u67E5\u770B\u670D\u52A1\u5668\u7684\u6027\u80FD\u3002</td></tr><tr><td>8</td><td>TRACE</td><td>\u56DE\u663E\u670D\u52A1\u5668\u6536\u5230\u7684\u8BF7\u6C42\uFF0C\u4E3B\u8981\u7528\u4E8E\u6D4B\u8BD5\u6216\u8BCA\u65AD\u3002</td></tr><tr><td>9</td><td>PATCH</td><td>\u662F\u5BF9 PUT \u65B9\u6CD5\u7684\u8865\u5145\uFF0C\u7528\u6765\u5BF9\u5DF2\u77E5\u8D44\u6E90\u8FDB\u884C\u5C40\u90E8\u66F4\u65B0 \u3002</td></tr></tbody></table><p><strong>GET\u8BF7\u6C42\u548CPOST\u8BF7\u6C42\u7684\u533A\u522B</strong></p><ol><li>GET \u8BF7\u6C42\u7684\u8BF7\u6C42\u53C2\u6570\u662F\u6DFB\u52A0\u5230 head \u4E2D\uFF0C\u53EF\u4EE5\u5728 url \u4E2D\u53EF\u4EE5\u770B\u5230\uFF1BPOST \u8BF7\u6C42\u7684\u8BF7\u6C42\u53C2\u6570\u662F\u6DFB\u52A0\u5230body\u4E2D\uFF0C\u5728url \u4E2D\u4E0D\u53EF\u89C1\u3002</li><li>\u8BF7\u6C42\u7684url\u6709\u957F\u5EA6\u9650\u5236\uFF0C\u8FD9\u4E2A\u9650\u5236\u7531\u6D4F\u89C8\u5668\u548C web \u670D\u52A1\u5668\u51B3\u5B9A\u548C\u8BBE\u7F6E\u7684\uFF0C\u4F8B\u5982IE\u6D4F\u89C8\u5668\u5BF9 URL\u7684\u6700\u5927\u9650\u5236\u4E3A2083\u4E2A\u5B57\u7B26\uFF0C\u5982\u679C\u8D85\u8FC7\u8FD9\u4E2A\u6570\u5B57\uFF0C\u63D0\u4EA4\u6309\u94AE\u6CA1\u6709\u4EFB\u4F55\u53CD\u5E94\uFF0C\u56E0\u4E3AGET\u8BF7\u6C42\u7684\u53C2\u6570\u662F\u6DFB\u52A0\u5230URL\u4E2D\uFF0C\u6240\u4EE5GET\u8BF7\u6C42\u7684URL\u7684\u957F\u5EA6\u9650\u5236\u9700\u8981\u5C06\u8BF7\u6C42\u53C2\u6570\u957F\u5EA6\u4E5F\u8003\u8651\u8FDB\u53BB\u3002\u800CPOST\u8BF7\u6C42\u4E0D\u7528\u8003\u8651\u8BF7\u6C42\u53C2\u6570\u7684\u957F\u5EA6\u3002</li><li>GET\u8BF7\u6C42\u4EA7\u751F\u4E00\u4E2A\u6570\u636E\u5305; POST\u8BF7\u6C42\u4EA7\u751F2\u4E2A\u6570\u636E\u5305\uFF0C\u5728\u706B\u72D0\u6D4F\u89C8\u5668\u4E2D\uFF0C\u4EA7\u751F\u4E00\u4E2A\u6570\u636E\u5305\uFF0C\u8FD9\u4E2A\u533A\u522B\u70B9\u5728\u4E8E\u6D4F\u89C8\u5668\u7684\u8BF7\u6C42\u673A\u5236\uFF0C\u5148\u53D1\u9001\u8BF7\u6C42\u5934\uFF0C\u518D\u53D1\u9001\u8BF7\u6C42\u4F53\uFF0C\u56E0\u4E3AGET\u6CA1\u6709\u8BF7\u6C42\u4F53\uFF0C\u6240\u4EE5\u5C31\u53D1\u9001\u4E00\u4E2A\u6570\u636E\u5305\uFF0C\u800CPOST\u5305\u542B\u8BF7\u6C42\u4F53\uFF0C\u6240\u4EE5\u53D1\u9001\u4E24\u6B21\u6570\u636E\u5305\uFF0C\u4F46\u662F\u7531\u4E8E\u706B\u72D0\u673A\u5236\u4E0D\u540C\uFF0C\u6240\u4EE5\u53D1\u9001\u4E00\u4E2A\u6570\u636E\u5305\u3002</li><li>GET \u8BF7\u6C42\u4F1A\u88AB\u6D4F\u89C8\u5668\u4E3B\u52A8\u7F13\u5B58\u4E0B\u6765\uFF0C\u7559\u4E0B\u5386\u53F2\u8BB0\u5F55\uFF0C\u800C POST \u9ED8\u8BA4\u4E0D\u4F1A\u3002</li><li>GET\u662F\u5E42\u7B49\u7684\uFF0C\u800CPOST\u4E0D\u662F(\u5E42\u7B49\u8868\u793A\u6267\u884C\u76F8\u540C\u7684\u64CD\u4F5C\uFF0C\u7ED3\u679C\u4E5F\u662F\u76F8\u540C\u7684)</li><li>GET\u662F\u83B7\u53D6\u6570\u636E\uFF0CPOST\u662F\u4FEE\u6539\u6570\u636E</li></ol><h3 id="\u72B6\u6001\u7801" tabindex="-1"><a class="header-anchor" href="#\u72B6\u6001\u7801" aria-hidden="true">#</a> \u72B6\u6001\u7801</h3><p><strong>\u72B6\u6001\u7801\u75313\u4F4D\u6570\u5B57\u7EC4\u6210\uFF0C\u7B2C\u4E00\u4F4D\u5B9A\u4E49\u54CD\u5E94\u7684\u7C7B\u522B</strong></p><p>1XX\uFF1A\u6307\u793A\u4FE1\u606F\uFF0C\u8868\u793A\u8BF7\u6C42\u4EE5\u63A5\u6536\uFF0C\u7EE7\u7EED\u5904\u7406</p><p>2XX\uFF1A\u6210\u529F\uFF0C\u8868\u793A\u8BF7\u6C42\u5DF2\u7ECF\u88AB\u6210\u529F\u63A5\u6536\u3001\u7406\u89E3\u3001\u63A5\u53D7</p><ul><li><p>200 OK \u662F\u6700\u5E38\u89C1\u7684\u6210\u529F\u72B6\u6001\u7801\uFF0C\u8868\u793A\u4E00\u5207\u6B63\u5E38\u3002\u5982\u679C\u662F\u975E HEAD \u8BF7\u6C42\uFF0C\u670D\u52A1\u5668\u8FD4\u56DE\u7684\u54CD\u5E94\u5934\u90FD\u4F1A\u6709 body \u6570\u636E\u3002</p></li><li><p>204 No Content \u4E5F\u662F\u5E38\u89C1\u7684\u6210\u529F\u72B6\u6001\u7801\uFF0C\u4E0E 200 OK \u57FA\u672C\u76F8\u540C\uFF0C\u4F46\u54CD\u5E94\u5934\u6CA1\u6709 body \u6570\u636E\u3002</p></li><li><p>206 Partial Content \u662F\u5E94\u7528\u4E8E HTTP \u5206\u5757\u4E0B\u8F7D\u6216\u65AD\u7535\u7EED\u4F20\uFF0C\u8868\u793A\u54CD\u5E94\u8FD4\u56DE\u7684 body \u6570\u636E\u5E76\u4E0D\u662F\u8D44\u6E90\u7684\u5168\u90E8\uFF0C\u800C\u662F\u5176\u4E2D\u7684\u4E00\u90E8\u5206\uFF0C\u4E5F\u662F\u670D\u52A1\u5668\u5904\u7406\u6210\u529F\u7684\u72B6\u6001\u3002</p></li></ul><p>3XX\uFF1A\u72B6\u6001\u7801\u8868\u793A\u5BA2\u6237\u7AEF\u8BF7\u6C42\u7684\u8D44\u6E90\u53D1\u9001\u4E86\u53D8\u52A8\uFF0C\u9700\u8981\u5BA2\u6237\u7AEF\u7528\u65B0\u7684 URL \u91CD\u65B0\u53D1\u9001\u8BF7\u6C42\u83B7\u53D6\u8D44\u6E90\uFF0C\u4E5F\u5C31\u662F<strong>\u91CD\u5B9A\u5411</strong>\u3002</p><ul><li>301 Moved Permanently \u8868\u793A\u6C38\u4E45\u91CD\u5B9A\u5411\uFF0C\u8BF4\u660E\u8BF7\u6C42\u7684\u8D44\u6E90\u5DF2\u7ECF\u4E0D\u5B58\u5728\u4E86\uFF0C\u9700\u6539\u7528\u65B0\u7684 URL \u518D\u6B21\u8BBF\u95EE\uFF0C\u641C\u7D22\u5F15\u64CE\u5728\u6293\u53D6\u65B0\u5185\u5BB9\u7684\u540C\u65F6\u4E5F\u5C06\u65E7\u7684\u7F51\u5740\u4EA4\u6362\u4E3A\u91CD\u5B9A\u5411\u4E4B\u540E\u7684\u7F51\u5740\u3002</li><li>302 Moved Permanently \u8868\u793A\u4E34\u65F6\u91CD\u5B9A\u5411\uFF0C\u8BF4\u660E\u8BF7\u6C42\u7684\u8D44\u6E90\u8FD8\u5728\uFF0C\u4F46\u6682\u65F6\u9700\u8981\u7528\u53E6\u4E00\u4E2A URL \u6765\u8BBF\u95EE\uFF0C\u641C\u7D22\u5F15\u64CE\u4F1A\u6293\u53D6\u65B0\u7684\u5185\u5BB9\u800C\u4FDD\u5B58\u65E7\u7684\u7F51\u5740\u3002</li></ul><p>301 \u548C 302 \u90FD\u4F1A\u5728\u54CD\u5E94\u5934\u91CC\u4F7F\u7528\u5B57\u6BB5 Location\uFF0C\u6307\u660E\u540E\u7EED\u8981\u8DF3\u8F6C\u7684 URL\uFF0C\u6D4F\u89C8\u5668\u4F1A\u81EA\u52A8\u91CD\u5B9A\u5411\u65B0\u7684 URL\u3002</p><ul><li>304 Not Modified\u4E0D\u5177\u6709\u8DF3\u8F6C\u7684\u542B\u4E49\uFF0C\u8868\u793A\u8D44\u6E90\u672A\u4FEE\u6539\uFF0C\u91CD\u5B9A\u5411\u5DF2\u5B58\u5728\u7684\u7F13\u51B2\u6587\u4EF6\uFF0C\u4E5F\u79F0\u7F13\u5B58\u91CD\u5B9A\u5411\uFF0C\u7528\u4E8E\u7F13\u5B58\u63A7\u5236\u3002</li></ul><p>4XX\uFF1A\u72B6\u6001\u7801\u8868\u793A\u5BA2\u6237\u7AEF\u53D1\u9001\u7684<strong>\u62A5\u6587\u6709\u8BEF</strong>\uFF0C\u670D\u52A1\u5668\u65E0\u6CD5\u5904\u7406\uFF0C\u4E5F\u5C31\u662F\u9519\u8BEF\u7801\u7684\u542B\u4E49\u3002</p><ul><li><p>400 Bad Request\u8868\u793A\u5BA2\u6237\u7AEF\u8BF7\u6C42\u7684\u62A5\u6587\u6709\u9519\u8BEF\u3002</p></li><li><p>401 Unauthorized\uFF1A\u7F3A\u5931\u6216\u9519\u8BEF\u7684\u8BA4\u8BC1\uFF0C\u8FD9\u4E2A\u72B6\u6001\u4EE3\u7801\u5FC5\u987B\u548CWWW-Authenticate\u62A5\u5934\u57DF\u4E00\u8D77\u4F7F\u7528\u3002</p></li><li><p>403 Forbidden\u8868\u793A\u670D\u52A1\u5668\u7981\u6B62\u8BBF\u95EE\u8D44\u6E90\uFF0C\u5E76\u4E0D\u662F\u5BA2\u6237\u7AEF\u7684\u8BF7\u6C42\u51FA\u9519\u3002</p></li><li><p>404 Not Found\u8868\u793A\u8BF7\u6C42\u7684\u8D44\u6E90\u5728\u670D\u52A1\u5668\u4E0A\u4E0D\u5B58\u5728\u6216\u672A\u627E\u5230\uFF0C\u6240\u4EE5\u65E0\u6CD5\u63D0\u4F9B\u7ED9\u5BA2\u6237\u7AEF\u3002</p></li></ul><p>5XX\uFF1A\u72B6\u6001\u7801\u8868\u793A\u5BA2\u6237\u7AEF\u8BF7\u6C42\u62A5\u6587\u6B63\u786E\uFF0C\u4F46\u662F<strong>\u670D\u52A1\u5668\u5904\u7406\u65F6\u5185\u90E8\u53D1\u751F\u4E86\u9519\u8BEF</strong>\uFF0C\u5C5E\u4E8E\u670D\u52A1\u5668\u7AEF\u7684\u9519\u8BEF\u7801\u3002</p><ul><li><p>501 Not Implemented \u8868\u793A\u5BA2\u6237\u7AEF\u8BF7\u6C42\u7684\u529F\u80FD\u8FD8\u4E0D\u652F\u6301\u3002</p></li><li><p>502 Bad Gateway \u901A\u5E38\u662F\u670D\u52A1\u5668\u4F5C\u4E3A\u7F51\u5173\u6216\u4EE3\u7406\u65F6\u8FD4\u56DE\u7684\u9519\u8BEF\u7801\uFF0C\u8868\u793A\u670D\u52A1\u5668\u81EA\u8EAB\u5DE5\u4F5C\u6B63\u5E38\uFF0C\u8BBF\u95EE\u540E\u7AEF\u670D\u52A1\u5668\u53D1\u751F\u4E86\u9519\u8BEF\u3002</p></li><li><p>503 Service Unavailable \u8868\u793A\u670D\u52A1\u5668\u5F53\u524D\u5F88\u5FD9\uFF0C\u6682\u65F6\u65E0\u6CD5\u54CD\u5E94\u670D\u52A1\u5668\u3002</p></li><li><p>504 Gateway Timeout\uFF1A\u7F51\u5173\u8D85\u65F6\uFF0C\u7531\u4F5C\u4E3A\u4EE3\u7406\u6216\u7F51\u5173\u7684\u670D\u52A1\u5668\u4F7F\u7528\uFF0C\u8868\u793A\u4E0D\u80FD\u53CA\u65F6\u5730\u4ECE\u8FDC\u7A0B\u670D\u52A1\u5668\u83B7\u5F97\u5E94\u7B54\u3002</p></li></ul><p><strong>301\u548C302\u7684\u533A\u522B</strong></p><p>301\u91CD\u5B9A\u5411\uFF0C\u6307\u9875\u9762\u6C38\u4E45\u6027\u8F6C\u79FB\uFF0C\u8868\u793A\u4E3A\u8D44\u6E90\u6216\u9875\u9762\u6C38\u4E45\u6027\u5730\u8F6C\u79FB\u5230\u4E86\u53E6\u4E00\u4E2A\u4F4D\u7F6E\u3002</p><p>301\u662FHTTP\u534F\u8BAE\u4E2D\u7684\u4E00\u79CD\u72B6\u6001\u7801\uFF0C\u5F53\u7528\u6237\u6216\u641C\u7D22\u5F15\u64CE\u5411\u670D\u52A1\u5668\u53D1\u51FA\u6D4F\u89C8\u8BF7\u6C42\u65F6\uFF0C\u670D\u52A1\u5668\u8FD4\u56DE\u7684HTTP\u6570\u636E\u6D41\u4E2D\u5934\u4FE1\u606F\u4E2D\u5305\u542B\u72B6\u6001\u7801 301 \uFF0C\u8868\u793A\u8BE5\u8D44\u6E90\u5DF2\u7ECF\u6C38\u4E45\u6539\u53D8\u4E86\u4F4D\u7F6E\u3002</p><p>302\u91CD\u5B9A\u5411\u662F\u9875\u9762\u6682\u65F6\u6027\u8F6C\u79FB\uFF0C\u641C\u7D22\u5F15\u64CE\u4F1A\u6293\u53D6\u65B0\u7684\u5185\u5BB9\u800C\u4FDD\u5B58\u65E7\u7684\u7F51\u5740\u5E76\u8BA4\u4E3A\u65B0\u7684\u7F51\u5740\u53EA\u662F\u6682\u65F6\u7684\u3002</p><h3 id="http1-1" tabindex="-1"><a class="header-anchor" href="#http1-1" aria-hidden="true">#</a> HTTP1.1</h3><p><strong>\u957F\u8FDE\u63A5</strong></p><p>HTTP 1.1\u652F\u6301\u957F\u8FDE\u63A5</p><p>HTTP 1.0\u89C4\u5B9A\u6D4F\u89C8\u5668\u4E0E\u670D\u52A1\u5668\u53EA\u4FDD\u6301\u77ED\u6682\u7684\u8FDE\u63A5\uFF0C\u6D4F\u89C8\u5668\u7684\u6BCF\u6B21\u8BF7\u6C42\u90FD\u9700\u8981\u4E0E\u670D\u52A1\u5668\u5EFA\u7ACB\u4E00\u4E2ATCP\u8FDE\u63A5\uFF0C\u670D\u52A1\u5668\u5B8C\u6210\u8BF7\u6C42\u5904\u7406\u540E\u7ACB\u5373\u65AD\u5F00TCP\u8FDE\u63A5\uFF0C\u670D\u52A1\u5668\u4E0D\u8DDF\u8E2A\u6BCF\u4E2A\u5BA2\u6237\u4E5F\u4E0D\u8BB0\u5F55\u8FC7\u53BB\u7684\u8BF7\u6C42\u3002</p><p>HTTP 1.1\u5219\u652F\u6301\u6301\u4E45\u8FDE\u63A5Persistent Connection\uFF0C\u5E76\u4E14\u9ED8\u8BA4\u4F7F\u7528\uFF0C\u5728\u540C\u4E00\u4E2ATCP\u7684\u8FDE\u63A5\u4E2D\u53EF\u4EE5\u4F20\u9001\u591A\u4E2AHTTP\u8BF7\u6C42\u548C\u54CD\u5E94\uFF0C\u591A\u4E2A\u8BF7\u6C42\u548C\u54CD\u5E94\u53EF\u4EE5\u91CD\u53E0\uFF0C\u591A\u4E2A\u8BF7\u6C42\u548C\u54CD\u5E94\u53EF\u4EE5\u540C\u65F6\u8FDB\u884C\uFF0C\u66F4\u52A0\u591A\u7684\u8BF7\u6C42\u5934\u548C\u54CD\u5E94\u5934</p><p>HTTP 1.1\u7684\u6301\u7EED\u8FDE\u63A5\uFF0C\u4E5F\u9700\u8981\u589E\u52A0\u65B0\u7684\u8BF7\u6C42\u5934\u6765\u5E2E\u52A9\u5B9E\u73B0\uFF0C\u4F8B\u5982\uFF0CConnection\u8BF7\u6C42\u5934\u7684\u503C\u4E3AKeep-Alive\u65F6\uFF0C\u5BA2\u6237\u7AEF\u901A\u77E5\u670D\u52A1\u5668\u8FD4\u56DE\u672C\u6B21\u8BF7\u6C42\u7ED3\u679C\u540E\u4FDD\u6301\u8FDE\u63A5\uFF1BConnection\u8BF7\u6C42\u5934\u7684\u503C\u4E3AClose\u65F6\uFF0C\u5BA2\u6237\u7AEF\u901A\u77E5\u670D\u52A1\u5668\u8FD4\u56DE\u672C\u6B21\u8BF7\u6C42\u7ED3\u679C\u540E\u5173\u95ED\u8FDE\u63A5\u3002</p><p><strong>\u7BA1\u9053\u7F51\u7EDC\u4F20\u8F93</strong></p><p>HTTP/1.1 \u91C7\u7528\u4E86\u957F\u8FDE\u63A5\u7684\u65B9\u5F0F\uFF0C\u8FD9\u4F7F\u5F97\u7BA1\u9053\u7F51\u7EDC\u4F20\u8F93\u6210\u4E3A\u4E86\u53EF\u80FD\u3002</p><p>\u5373\u53EF\u5728\u540C\u4E00\u4E2A TCP \u8FDE\u63A5\u91CC\u9762\uFF0C\u5BA2\u6237\u7AEF\u53EF\u4EE5\u53D1\u8D77\u591A\u4E2A\u8BF7\u6C42\uFF0C\u53EA\u8981\u7B2C\u4E00\u4E2A\u8BF7\u6C42\u53D1\u51FA\u53BB\u4E86\uFF0C\u4E0D\u5FC5\u7B49\u5176\u56DE\u6765\uFF0C\u5C31\u53EF\u4EE5\u53D1\u7B2C\u4E8C\u4E2A\u8BF7\u6C42\u51FA\u53BB\uFF0C\u53EF\u4EE5<strong>\u51CF\u5C11\u6574\u4F53\u7684\u54CD\u5E94\u65F6\u95F4\u3002</strong></p><p>\u4E3E\u4F8B\u6765\u8BF4\uFF0C\u5BA2\u6237\u7AEF\u9700\u8981\u8BF7\u6C42\u4E24\u4E2A\u8D44\u6E90\u3002\u4EE5\u524D\u7684\u505A\u6CD5\u662F\uFF0C\u5728\u540C\u4E00\u4E2ATCP\u8FDE\u63A5\u91CC\u9762\uFF0C\u5148\u53D1\u9001 A \u8BF7\u6C42\uFF0C\u7136\u540E\u7B49\u5F85\u670D\u52A1\u5668\u505A\u51FA\u56DE\u5E94\uFF0C\u6536\u5230\u540E\u518D\u53D1\u51FA B \u8BF7\u6C42\uFF0C\u7BA1\u9053\u673A\u5236\u5219\u662F\u5141\u8BB8\u6D4F\u89C8\u5668\u540C\u65F6\u53D1\u51FA A \u8BF7\u6C42\u548C B \u8BF7\u6C42\u3002</p><p>\u4F46\u662F\u670D\u52A1\u5668\u8FD8\u662F\u6309\u7167<strong>\u987A\u5E8F</strong>\uFF0C\u5148\u56DE\u5E94 A \u8BF7\u6C42\uFF0C\u5B8C\u6210\u540E\u518D\u56DE\u5E94 B \u8BF7\u6C42\uFF0C\u8981\u662F \u524D\u9762\u7684\u56DE\u5E94\u7279\u522B\u6162\uFF0C\u540E\u9762\u5C31\u4F1A\u6709\u8BB8\u591A\u8BF7\u6C42\u6392\u961F\u7B49\u7740\u3002</p><p><strong>Host\u5B57\u6BB5</strong></p><p>\u5728HTTP1.0\u4E2D\u8BA4\u4E3A\u6BCF\u53F0\u670D\u52A1\u5668\u90FD\u7ED1\u5B9A\u4E00\u4E2A\u552F\u4E00\u7684IP\u5730\u5740\uFF0C\u56E0\u6B64\uFF0C\u8BF7\u6C42\u6D88\u606F\u4E2D\u7684URL\u5E76\u6CA1\u6709\u4F20\u9012\u4E3B\u673A\u540D\uFF0C\u4F46\u968F\u7740\u865A\u62DF\u4E3B\u673A\u6280\u672F\u7684\u53D1\u5C55\uFF0C\u5728\u4E00\u53F0\u7269\u7406\u670D\u52A1\u5668\u4E0A\u53EF\u4EE5\u5B58\u5728\u591A\u4E2A\u865A\u62DF\u4E3B\u673A\uFF0C\u5E76\u4E14\u5B83\u4EEC\u5171\u4EAB\u4E00\u4E2AIP\u5730\u5740\u3002</p><p>HTTP1.1\u7684\u8BF7\u6C42\u6D88\u606F\u548C\u54CD\u5E94\u6D88\u606F\u90FD\u5E94\u652F\u6301Host\u5934\u57DF\uFF0C\u4E14\u8BF7\u6C42\u6D88\u606F\u4E2D\u5982\u679C\u6CA1\u6709Host\u5934\u57DF\u4F1A\u62A5\u544A\u4E00\u4E2A\u9519\u8BEF\uFF08400 Bad Request\uFF09\u3002</p><p>\u6B64\u5916\uFF0C\u670D\u52A1\u5668\u5E94\u8BE5\u63A5\u53D7\u4EE5\u7EDD\u5BF9\u8DEF\u5F84\u6807\u8BB0\u7684\u8D44\u6E90\u8BF7\u6C42\u3002</p><p><strong>100Status</strong></p><p>HTTP/1.1\u52A0\u5165\u4E86\u4E00\u4E2A\u65B0\u7684\u72B6\u6001\u7801100\u3002</p><p>\u5BA2\u6237\u7AEF\u4E8B\u5148\u53D1\u9001\u4E00\u4E2A\u53EA\u5E26\u5934\u57DF\u7684\u8BF7\u6C42\uFF0C\u5982\u679C\u670D\u52A1\u5668\u56E0\u4E3A\u6743\u9650\u62D2\u7EDD\u4E86\u8BF7\u6C42\uFF0C\u5C31\u56DE\u9001\u54CD\u5E94\u7801401\uFF08Unauthorized\uFF09\uFF1B</p><p>\u5982\u679C\u670D\u52A1\u5668\u63A5\u6536\u6B64\u8BF7\u6C42\u5C31\u56DE\u9001\u54CD\u5E94\u7801100\uFF0C\u5BA2\u6237\u7AEF\u5C31\u53EF\u4EE5\u7EE7\u7EED\u53D1\u9001\u5E26\u5B9E\u4F53\u7684\u5B8C\u6574\u8BF7\u6C42\u4E86\u3002</p><p>100\u72B6\u6001\u4EE3\u7801\u7684\u4F7F\u7528\uFF0C\u5141\u8BB8\u5BA2\u6237\u7AEF\u5728\u53D1request\u6D88\u606Fbody\u4E4B\u524D\u5148\u7528request header\u8BD5\u63A2\u4E00\u4E0Bserver\uFF0C\u770Bserver\u8981\u4E0D\u8981\u63A5\u6536request body\uFF0C\u518D\u51B3\u5B9A\u8981\u4E0D\u8981\u53D1request body\u3002</p><p><strong>Chunked Transfer Coding</strong></p><p>HTTP/1.1\u5C06\u53D1\u9001\u65B9\u5C06\u6D88\u606F\u5206\u5272\u6210\u82E5\u5E72\u4E2A\u4EFB\u610F\u5927\u5C0F\u7684\u6570\u636E\u5757\uFF0C\u6BCF\u4E2A\u6570\u636E\u5757\u5728\u53D1\u9001\u65F6\u90FD\u4F1A\u9644\u4E0A\u5757\u7684\u957F\u5EA6\uFF0C\u6700\u540E\u7528\u4E00\u4E2A\u96F6\u957F\u5EA6\u7684\u5757\u4F5C\u4E3A\u6D88\u606F\u7ED3\u675F\u7684\u6807\u5FD7\u3002</p><p>\u8FD9\u79CD\u65B9\u6CD5\u5141\u8BB8\u53D1\u9001\u65B9\u53EA\u7F13\u51B2\u6D88\u606F\u7684\u4E00\u4E2A\u7247\u6BB5\uFF0C\u907F\u514D\u7F13\u51B2\u6574\u4E2A\u6D88\u606F\u5E26\u6765\u7684\u8FC7\u8F7D\u3002</p><p><strong>Cache</strong></p><p>HTTP/1.1\u57281.0\u7684\u57FA\u7840\u4E0A\u52A0\u5165\u4E86\u4E00\u4E9BCache\u7684\u65B0\u7279\u6027\uFF0C\u5F53\u7F13\u5B58\u5BF9\u8C61\u7684Age\u8D85\u8FC7Expire\u65F6\u53D8\u4E3AStable\u5BF9\u8C61\uFF0CCache\u4E0D\u9700\u8981\u76F4\u63A5\u629B\u5F03Stable\u5BF9\u8C61\uFF0C\u800C\u662F\u4E0E\u6E90\u670D\u52A1\u5668\u8FDB\u884C\u91CD\u65B0\u6FC0\u6D3B\u3002</p><h3 id="http2-0" tabindex="-1"><a class="header-anchor" href="#http2-0" aria-hidden="true">#</a> HTTP2.0</h3><p><strong>HTTP2.0\u548CHTTP1.X\u76F8\u6BD4\u7684\u65B0\u7279\u6027</strong></p><ul><li><p>\u65B0\u7684\u4E8C\u8FDB\u5236\u683C\u5F0F\uFF0C<code>HTTP1.x</code>\u7684\u89E3\u6790\u662F\u57FA\u4E8E\u6587\u672C</p></li><li><p>\u591A\u8DEF\u590D\u7528\uFF0C\u5373\u8FDE\u63A5\u5171\u4EAB\uFF0C\u5373\u6BCF\u4E00\u4E2Arequest\u90FD\u662F\u662F\u7528\u4F5C\u8FDE\u63A5\u5171\u4EAB\u673A\u5236\u7684\uFF0C\u4E00\u4E2Arequest\u5BF9\u5E94\u4E00\u4E2Aid\uFF0C\u8FD9\u6837\u4E00\u4E2A\u8FDE\u63A5\u4E0A\u53EF\u4EE5\u6709\u591A\u4E2Arequest\uFF0C\u6BCF\u4E2A\u8FDE\u63A5\u7684request\u53EF\u4EE5\u968F\u673A\u7684\u6DF7\u6742\u5728\u4E00\u8D77\uFF0C\u63A5\u6536\u65B9\u53EF\u4EE5\u6839\u636Erequest\u7684 id\u5C06request\u518D\u5F52\u5C5E\u5230\u5404\u81EA\u4E0D\u540C\u7684\u670D\u52A1\u7AEF\u8BF7\u6C42\u91CC\u9762</p></li><li><p>header\u538B\u7F29\uFF0C<code>HTTP1.x</code>\u7684header\u5E26\u6709\u5927\u91CF\u4FE1\u606F\uFF0C\u800C\u4E14\u6BCF\u6B21\u90FD\u8981\u91CD\u590D\u53D1\u9001\uFF0CHTTP2.0\u4F7F\u7528encoder\u6765\u51CF\u5C11\u9700\u8981\u4F20\u8F93\u7684header\u5927\u5C0F\uFF0C\u901A\u8BAF\u53CC\u65B9\u5404\u81EAcache\u4E00\u4EFDheader fields\u8868\uFF0C\u65E2\u907F\u514D\u4E86\u91CD\u590Dheader\u7684\u4F20\u8F93\uFF0C\u53C8\u51CF\u5C0F\u4E86\u9700\u8981\u4F20\u8F93\u7684\u5927\u5C0F</p></li><li><p>\u670D\u52A1\u7AEF\u63A8\u9001</p></li></ul><p>HTTP/2 \u8FD8\u5728\u4E00\u5B9A\u7A0B\u5EA6\u4E0A\u6539\u5584\u4E86\u4F20\u7EDF\u7684\u8BF7\u6C42 - \u5E94\u7B54\u5DE5\u4F5C\u6A21\u5F0F\uFF0C\u670D\u52A1\u4E0D\u518D\u662F\u88AB\u52A8\u5730\u54CD\u5E94\uFF0C\u4E5F\u53EF\u4EE5<strong>\u4E3B\u52A8</strong>\u5411\u5BA2\u6237\u7AEF\u53D1\u9001\u6D88\u606F\u3002</p><p>\u4E3E\u4F8B\u6765\u8BF4\uFF0C\u5728\u6D4F\u89C8\u5668\u521A\u8BF7\u6C42 HTML \u7684\u65F6\u5019\uFF0C\u5C31\u63D0\u524D\u628A\u53EF\u80FD\u4F1A\u7528\u5230\u7684 JS\u3001CSS \u6587\u4EF6\u7B49\u9759\u6001\u8D44\u6E90\u4E3B\u52A8\u53D1\u7ED9\u5BA2\u6237\u7AEF\uFF0C<strong>\u51CF\u5C11\u5EF6\u65F6\u7684\u7B49\u5F85</strong>\uFF0C\u4E5F\u5C31\u662F\u670D\u52A1\u5668\u63A8\u9001\u3002</p><p><strong>\u6570\u636E\u6D41</strong></p><p>HTTP/2 \u7684\u6570\u636E\u5305\u4E0D\u662F\u6309\u987A\u5E8F\u53D1\u9001\u7684\uFF0C\u540C\u4E00\u4E2A\u8FDE\u63A5\u91CC\u9762\u8FDE\u7EED\u7684\u6570\u636E\u5305\uFF0C\u53EF\u80FD\u5C5E\u4E8E\u4E0D\u540C\u7684\u56DE\u5E94\u3002</p><p>\u56E0\u6B64\uFF0C\u5FC5\u987B\u8981\u5BF9\u6570\u636E\u5305\u505A\u6807\u8BB0\uFF0C\u6307\u51FA\u5B83\u5C5E\u4E8E\u54EA\u4E2A\u56DE\u5E94\u3002</p><p>\u6BCF\u4E2A\u8BF7\u6C42\u6216\u56DE\u5E94\u7684\u6240\u6709\u6570\u636E\u5305\uFF0C\u79F0\u4E3A\u4E00\u4E2A\u6570\u636E\u6D41\uFF08Stream\uFF09\u3002</p><p>\u6BCF\u4E2A\u6570\u636E\u6D41\u90FD\u6807\u8BB0\u7740\u4E00\u4E2A\u72EC\u4E00\u65E0\u4E8C\u7684\u7F16\u53F7\uFF0C\u5176\u4E2D\u89C4\u5B9A\u5BA2\u6237\u7AEF\u53D1\u51FA\u7684\u6570\u636E\u6D41\u7F16\u53F7\u4E3A\u5947\u6570\uFF0C \u670D\u52A1\u5668\u53D1\u51FA\u7684\u6570\u636E\u6D41\u7F16\u53F7\u4E3A\u5076\u6570</p><p>\u5BA2\u6237\u7AEF\u8FD8\u53EF\u4EE5<strong>\u6307\u5B9A\u6570\u636E\u6D41\u7684\u4F18\u5148\u7EA7</strong>\u3002\u4F18\u5148\u7EA7\u9AD8\u7684\u8BF7\u6C42\uFF0C\u670D\u52A1\u5668\u5C31\u5148\u54CD\u5E94\u8BE5\u8BF7\u6C42\u3002</p><p><strong>HTTP2.0\u7684\u591A\u8DEF\u590D\u7528\u548CHTTP1.X\u4E2D\u7684\u957F\u8FDE\u63A5\u590D\u7528\u6709\u4EC0\u4E48\u533A\u522B</strong></p><ul><li>HTTP/1.1\u7684Pipeling\u4E3A\u82E5\u5E72\u4E2A\u8BF7\u6C42\u6392\u961F\u4E32\u884C\u5316\u5355\u7EBF\u7A0B\u5904\u7406\uFF0C\u540E\u9762\u7684\u8BF7\u6C42\u7B49\u5F85\u524D\u9762\u8BF7\u6C42\u7684\u8FD4\u56DE\u624D\u80FD\u83B7\u5F97\u6267\u884C\u673A\u4F1A\uFF0C\u4E00\u65E6\u6709\u67D0\u8BF7\u6C42\u8D85\u65F6\u7B49\uFF0C\u540E\u7EED\u8BF7\u6C42\u53EA\u80FD\u88AB\u963B\u585E\uFF0C\u6BEB\u65E0\u529E\u6CD5\uFF1B</li><li>HTTP2.0\u591A\u4E2A\u8BF7\u6C42\u53EF\u540C\u65F6\u5728\u4E00\u4E2A\u8FDE\u63A5\u4E0A\u5E76\u884C\u6267\u884C\uFF0C\u67D0\u4E2A\u8BF7\u6C42\u4EFB\u52A1\u8017\u65F6\u4E25\u91CD\uFF0C\u4E0D\u4F1A\u5F71\u54CD\u5230\u5176\u5B83\u8FDE\u63A5\u7684\u6B63\u5E38\u6267\u884C</li></ul><h3 id="http3-0" tabindex="-1"><a class="header-anchor" href="#http3-0" aria-hidden="true">#</a> HTTP3.0</h3><p><strong>\u4F7F\u7528UDP\u534F\u8BAE</strong></p><p>HTTP/2 \u4E3B\u8981\u7684\u95EE\u9898\u5728\u4E8E\uFF1A\u591A\u4E2A HTTP \u8BF7\u6C42\u5728\u590D\u7528\u4E00\u4E2A TCP \u8FDE\u63A5\uFF0C\u4E0B\u5C42\u7684 TCP \u534F\u8BAE\u662F\u4E0D\u77E5\u9053\u6709\u591A\u5C11\u4E2A HTTP \u8BF7\u6C42\u7684\u3002</p><p>\u6240\u4EE5\u4E00\u65E6\u53D1\u751F\u4E86\u4E22\u5305\u73B0\u8C61\uFF0C\u5C31\u4F1A\u89E6\u53D1 TCP \u7684\u91CD\u4F20\u673A\u5236\uFF0C\u8FD9\u6837\u5728\u4E00\u4E2A TCP \u8FDE\u63A5\u4E2D\u7684<strong>\u6240\u6709\u7684 HTTP \u8BF7\u6C42\u90FD\u5FC5\u987B\u7B49\u5F85\u8FD9\u4E2A\u4E22\u4E86\u7684\u5305\u88AB\u91CD\u4F20\u56DE\u6765</strong>\u3002</p><ul><li>HTTP/1.1 \u4E2D\u7684\u7BA1\u9053\u4F20\u8F93\u4E2D\u5982\u679C\u6709\u4E00\u4E2A\u8BF7\u6C42\u963B\u585E\u4E86\uFF0C\u90A3\u4E48\u961F\u5217\u540E\u8BF7\u6C42\u4E5F\u7EDF\u7EDF\u88AB\u963B\u585E\u4F4F\u4E86</li><li>HTTP/2 \u591A\u8BF7\u6C42\u590D\u7528\u4E00\u4E2ATCP\u8FDE\u63A5\uFF0C\u4E00\u65E6\u53D1\u751F\u4E22\u5305\uFF0C\u5C31\u4F1A\u963B\u585E\u4F4F\u6240\u6709\u7684 HTTP \u8BF7\u6C42\u3002</li></ul><p>\u8FD9\u90FD\u662F\u57FA\u4E8E TCP \u4F20\u8F93\u5C42\u7684\u95EE\u9898\uFF0C\u6240\u4EE5 <strong>HTTP/3 \u628A HTTP \u4E0B\u5C42\u7684 TCP \u534F\u8BAE\u6539\u6210\u4E86 UDP\uFF01</strong></p><h3 id="https" tabindex="-1"><a class="header-anchor" href="#https" aria-hidden="true">#</a> HTTPS</h3><p><strong>HTTP\u4E0EHTTPS\u7684\u533A\u522B</strong></p><p>HTTP \u662F\u660E\u6587\u4F20\u8F93\u534F\u8BAE\uFF0CHTTPS \u534F\u8BAE\u662F\u7531 SSL+HTTP \u534F\u8BAE\u6784\u5EFA\u7684\u53EF\u8FDB\u884C\u52A0\u5BC6\u4F20\u8F93\u3001\u8EAB\u4EFD\u8BA4\u8BC1\u7684\u7F51\u7EDC\u534F\u8BAE\uFF0C\u6BD4 HTTP \u534F\u8BAE\u5B89\u5168</p><ul><li><p>HTTPS\u6BD4HTTP\u66F4\u52A0\u5B89\u5168\uFF0C\u5BF9\u641C\u7D22\u5F15\u64CE\u66F4\u53CB\u597D\uFF0C\u5229\u4E8ESEO\uFF0C\u8C37\u6B4C\u3001\u767E\u5EA6\u4F18\u5148\u7D22\u5F15HTTPS\u7F51\u9875</p></li><li><p>HTTPS\u9700\u8981\u7528\u5230SSL\u8BC1\u4E66\uFF0C\u800CHTTP\u4E0D\u7528</p></li><li><p>HTTPS\u6807\u51C6\u7AEF\u53E3443\uFF0CHTTP\u6807\u51C6\u7AEF\u53E380</p></li><li><p>HTTPS\u57FA\u4E8E\u4F20\u8F93\u5C42\uFF0CHTTP\u57FA\u4E8E\u5E94\u7528\u5C42</p></li><li><p>HTTPS\u5728\u6D4F\u89C8\u5668\u663E\u793A\u7EFF\u8272\u5B89\u5168\u9501\uFF0CHTTP\u6CA1\u6709\u663E\u793A</p></li></ul><p><strong>\u5DE5\u4F5C\u539F\u7406</strong></p><p>HTTPS \u534F\u8BAE\u4F1A\u5BF9\u4F20\u8F93\u7684\u6570\u636E\u8FDB\u884C\u52A0\u5BC6\uFF0C\u800C\u52A0\u5BC6\u8FC7\u7A0B\u662F\u4F7F\u7528\u4E86\u975E\u5BF9\u79F0\u52A0\u5BC6\u5B9E\u73B0</p><p>HTTPS\u7684\u6574\u4F53\u8FC7\u7A0B\u5206\u4E3A\u8BC1\u4E66\u9A8C\u8BC1\u548C\u6570\u636E\u4F20\u8F93\u9636\u6BB5\uFF0C\u5177\u4F53\u7684\u4EA4\u4E92\u8FC7\u7A0B\u5982\u4E0B\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-c1db0431-0eee-4c80-bb60-b7508a306864.png" alt=""></p><ul><li>Client\u53D1\u8D77\u4E00\u4E2AHTTPS\u7684\u8BF7\u6C42</li><li>Server\u628A\u4E8B\u5148\u914D\u7F6E\u597D\u7684\u516C\u94A5\u8BC1\u4E66\u8FD4\u56DE\u7ED9\u5BA2\u6237\u7AEF\u3002</li><li>Client\u9A8C\u8BC1\u516C\u94A5\u8BC1\u4E66\uFF1A\u6BD4\u5982\u662F\u5426\u5728\u6709\u6548\u671F\u5185\uFF0C\u8BC1\u4E66\u7684\u7528\u9014\u662F\u4E0D\u662F\u5339\u914DClient\u8BF7\u6C42\u7684\u7AD9\u70B9\uFF0C\u662F\u4E0D\u662F\u5728CRL\u540A\u9500\u5217\u8868\u91CC\u9762\uFF0C\u5B83\u7684\u4E0A\u4E00\u7EA7\u8BC1\u4E66\u662F\u5426\u6709\u6548\uFF0C\u8FD9\u662F\u4E00\u4E2A\u9012\u5F52\u7684\u8FC7\u7A0B\uFF0C\u76F4\u5230\u9A8C\u8BC1\u5230\u6839\u8BC1\u4E66\uFF08\u64CD\u4F5C\u7CFB\u7EDF\u5185\u7F6E\u7684Root\u8BC1\u4E66\u6216\u8005Client\u5185\u7F6E\u7684Root\u8BC1\u4E66\uFF09\uFF0C\u5982\u679C\u9A8C\u8BC1\u901A\u8FC7\u5219\u7EE7\u7EED\uFF0C\u4E0D\u901A\u8FC7\u5219\u663E\u793A\u8B66\u544A\u4FE1\u606F\u3002</li><li>Client\u4F7F\u7528\u4F2A\u968F\u673A\u6570\u751F\u6210\u5668\u751F\u6210\u52A0\u5BC6\u6240\u4F7F\u7528\u7684\u5BF9\u79F0\u5BC6\u94A5\uFF0C\u7136\u540E\u7528\u8BC1\u4E66\u7684\u516C\u94A5\u52A0\u5BC6\u8FD9\u4E2A\u5BF9\u79F0\u5BC6\u94A5\uFF0C\u53D1\u7ED9Server\u3002</li><li>Server\u4F7F\u7528\u81EA\u5DF1\u7684\u79C1\u94A5\u89E3\u5BC6\u8FD9\u4E2A\u6D88\u606F\uFF0C\u5F97\u5230\u5BF9\u79F0\u5BC6\u94A5\u3002\u81F3\u6B64\uFF0CClient\u548CServer\u53CC\u65B9\u90FD\u6301\u6709\u4E86\u76F8\u540C\u7684\u5BF9\u79F0\u5BC6\u94A5\u3002</li><li>Server\u4F7F\u7528\u5BF9\u79F0\u5BC6\u94A5\u52A0\u5BC6\u660E\u6587\u5185\u5BB9A\uFF0C\u53D1\u9001\u7ED9Client\u3002</li><li>Client\u4F7F\u7528\u5BF9\u79F0\u5BC6\u94A5\u89E3\u5BC6\u54CD\u5E94\u7684\u5BC6\u6587\uFF0C\u5F97\u5230\u660E\u6587\u5185\u5BB9A\u3002</li><li>Client\u518D\u6B21\u53D1\u8D77HTTPS\u7684\u8BF7\u6C42\uFF0C\u4F7F\u7528\u5BF9\u79F0\u5BC6\u94A5\u52A0\u5BC6\u8BF7\u6C42\u7684\u660E\u6587\u5185\u5BB9B\uFF0C\u7136\u540EServer\u4F7F\u7528\u5BF9\u79F0\u5BC6\u94A5\u89E3\u5BC6\u5BC6\u6587\uFF0C\u5F97\u5230\u660E\u6587\u5185\u5BB9B\u3002</li></ul><h4 id="\u6570\u5B57\u8BC1\u4E66" tabindex="-1"><a class="header-anchor" href="#\u6570\u5B57\u8BC1\u4E66" aria-hidden="true">#</a> \u6570\u5B57\u8BC1\u4E66</h4><p>\u5BA2\u6237\u7AEF\u5148\u5411\u670D\u52A1\u5668\u7AEF\u7D22\u8981\u516C\u94A5\uFF0C\u7136\u540E\u7528\u516C\u94A5\u52A0\u5BC6\u4FE1\u606F\uFF0C\u670D\u52A1\u5668\u6536\u5230\u5BC6\u6587\u540E\uFF0C\u7528\u81EA\u5DF1\u7684\u79C1\u94A5\u89E3\u5BC6\u3002</p><blockquote><p>\u8FD9\u5C31\u5B58\u5728\u4E9B\u95EE\u9898\uFF0C\u5982\u4F55\u4FDD\u8BC1\u516C\u94A5\u4E0D\u88AB\u7BE1\u6539\u548C\u4FE1\u4EFB\u5EA6\uFF1F</p></blockquote><p>\u6240\u4EE5\u8FD9\u91CC\u5C31\u9700\u8981\u501F\u52A9\u7B2C\u4E09\u65B9\u6743\u5A01\u673A\u6784 CA \uFF08\u6570\u5B57\u8BC1\u4E66\u8BA4\u8BC1\u673A\u6784\uFF09\uFF0C\u5C06<strong>\u670D\u52A1\u5668\u516C\u94A5\u653E\u5728\u6570\u5B57\u8BC1\u4E66</strong>\uFF08\u7531\u6570\u5B57\u8BC1\u4E66\u8BA4\u8BC1\u673A\u6784\u9881\u53D1\uFF09\u4E2D\uFF0C\u53EA\u8981\u8BC1\u4E66\u662F\u53EF\u4FE1\u7684\uFF0C\u516C\u94A5\u5C31\u662F\u53EF\u4FE1\u7684\u3002</p><p>\u901A\u8FC7\u6570\u5B57\u8BC1\u4E66\u7684\u65B9\u5F0F\u4FDD\u8BC1\u670D\u52A1\u5668\u516C\u94A5\u7684\u8EAB\u4EFD\uFF0C\u89E3\u51B3\u5192\u5145\u7684\u98CE\u9669\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-45917c49-bb08-4f88-84d2-5e8ae53acc7c.png" alt=""></p><h3 id="\u8BF7\u6C42\u62A5\u6587" tabindex="-1"><a class="header-anchor" href="#\u8BF7\u6C42\u62A5\u6587" aria-hidden="true">#</a> \u8BF7\u6C42\u62A5\u6587</h3><p><strong>\u8BF7\u6C42\u5934</strong></p><p>HTTP \u8BF7\u6C42\u62A5\u6587\u75313\u90E8\u5206\u7EC4\u6210(\u8BF7\u6C42\u884C+\u8BF7\u6C42\u5934+\u8BF7\u6C42\u4F53)</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-3c00598c-43c2-44cd-96c6-ee4d40b97abd.png" alt=""></p><p><strong>\u5E38\u89C1\u7684HTTP\u62A5\u6587\u5934\u5C5E\u6027</strong></p><ul><li>Accpet <ul><li>\u544A\u8BC9\u670D\u52A1\u7AEF\uFF0C\u5BA2\u6237\u7AEF\u63A5\u6536\u4EC0\u4E48\u7C7B\u578B\u7684\u54CD\u5E94</li></ul></li><li>Referer <ul><li>\u8868\u793A\u8FD9\u662F\u8BF7\u6C42\u662F\u4ECE\u54EA\u4E2AURL\u8FDB\u6765\u7684,\u6BD4\u5982\u60F3\u5728\u7F51\u4E0A\u8D2D\u7269\uFF0C\u4F46\u662F\u4E0D\u77E5\u9053\u9009\u62E9\u54EA\u5BB6\u7535\u5546\u5E73\u53F0\uFF0C\u4F60\u5C31\u53BB\u95EE\u5EA6\u5A18\uFF0C\u8BF4\u54EA\u5BB6\u7535\u5546\u7684\u4E1C\u897F\u4FBF\u5B9C\u554A\uFF0C\u7136\u540E\u4E00\u5806\u4E1C\u897F\u5F39\u51FA\u5728\u4F60\u9762\u524D\uFF0C\u7B2C\u4E00\u7ED9\u5C31\u662F\u67D0\u5B9D\uFF0C\u5F53\u4F60\u4ECE\u8FD9\u91CC\u8FDB\u5165\u67D0\u5B9D\u7684\u65F6\u5019\uFF0C\u8FD9\u4E2A\u8BF7\u6C42\u62A5\u6587\u7684Referer\u5C31\u662F\uFF1A<a href="www.baidu.com">www.baidu.com</a></li></ul></li><li>Cache-Control <ul><li>\u5BF9\u7F13\u5B58\u8FDB\u884C\u63A7\u5236\uFF0C\u5982\u4E00\u4E2A\u8BF7\u6C42\u5E0C\u671B\u54CD\u5E94\u7684\u5185\u5BB9\u5728\u5BA2\u6237\u7AEF\u7F13\u5B58\u4E00\u5E74\uFF0C\u6216\u4E0D\u88AB\u7F13\u53EF\u4EE5\u901A\u8FC7\u8FD9\u4E2A\u62A5\u6587\u5934\u8BBE\u7F6E</li></ul></li><li>Accept-Encoding <ul><li>\u8FD9\u4E2A\u5C5E\u6027\u662F\u7528\u6765\u544A\u8BC9\u670D\u52A1\u5668\u80FD\u63A5\u53D7\u4EC0\u4E48\u7F16\u7801\u683C\u5F0F\uFF0C\u5305\u62EC\u5B57\u7B26\u7F16\u7801,\u538B\u7F29\u5F62\u5F0F(\u4E00\u822C\u90FD\u662F\u538B\u7F29\u5F62\u5F0F) <ul><li>\u4F8B\u5982:<code>Accept-Encoding:gzip, deflate</code>(\u8FD9\u4E24\u79CD\u90FD\u662F\u538B\u7F29\u683C\u5F0F)</li></ul></li></ul></li><li>Host <ul><li>\u6307\u5B9A\u8981\u8BF7\u6C42\u7684\u8D44\u6E90\u6240\u5728\u7684\u4E3B\u673A\u548C\u7AEF\u53E3</li></ul></li><li>User-Agent\uFF1A\u544A\u8BC9\u670D\u52A1\u5668\uFF0C\u5BA2\u6237\u7AEF\u4F7F\u7528\u7684\u64CD\u4F5C\u7CFB\u7EDF\u3001\u6D4F\u89C8\u5668\u7248\u672C\u548C\u540D\u79F0</li><li>Connection</li></ul><p>\u51B3\u5B9A\u5F53\u524D\u4E8B\u52A1\uFF08\u4E09\u6B21\u63E1\u624B\u548C\u56DB\u6B21\u6325\u624B\uFF09\u5B8C\u6210\u540E\uFF0C\u662F\u5426\u5173\u95ED\u7F51\u7EDC\u8FDE\u63A5\u3002</p><ul><li>\u6301\u4E45\u8FDE\u63A5\uFF0C\u4E8B\u52A1\u5B8C\u6210\u540E\u4E0D\u5173\u95ED\u7F51\u7EDC\u8FDE\u63A5 \uFF1A<code> Connection: keep-alive</code></li></ul><ul><li>\u975E\u6301\u4E45\u8FDE\u63A5\uFF0C\u4E8B\u52A1\u5B8C\u6210\u540E\u5173\u95ED\u7F51\u7EDC\u8FDE\u63A5\uFF1A <code>Connection: close</code></li></ul><h3 id="\u54CD\u5E94\u62A5\u6587" tabindex="-1"><a class="header-anchor" href="#\u54CD\u5E94\u62A5\u6587" aria-hidden="true">#</a> \u54CD\u5E94\u62A5\u6587</h3><p>\u54CD\u5E94\u62A5\u6587\u4E0E\u8BF7\u6C42\u62A5\u6587\u4E00\u6837\uFF0C\u7531\u4E09\u4E2A\u90E8\u5206\u7EC4\u6210(\u54CD\u5E94\u884C,\u54CD\u5E94\u5934,\u54CD\u5E94\u4F53)</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-58884113-14dc-4cca-a63e-3320f31a4da5.png" alt=""></p><p><strong>HTTP\u54CD\u5E94\u62A5\u6587\u5C5E\u6027</strong></p><ul><li>Cache-Control <ul><li>\u54CD\u5E94\u8F93\u51FA\u5230\u5BA2\u6237\u7AEF\u540E\uFF0C\u670D\u52A1\u7AEF\u901A\u8FC7\u8BE5\u5C5E\u6027\u544A\u8BC9\u5BA2\u6237\u7AEF\u8BE5\u600E\u4E48\u63A7\u5236\u54CD\u5E94\u5185\u5BB9\u7684\u7F13\u5B58</li></ul></li><li>ETag <ul><li>\u8868\u793A\u4F60\u8BF7\u6C42\u8D44\u6E90\u7684\u7248\u672C\uFF0C\u5982\u679C\u8BE5\u8D44\u6E90\u53D1\u751F\u5566\u53D8\u5316\uFF0C\u90A3\u4E48\u8FD9\u4E2A\u5C5E\u6027\u4E5F\u4F1A\u8DDF\u7740\u53D8</li></ul></li><li>Location <ul><li>\u5728\u91CD\u5B9A\u5411\u4E2D\u6216\u8005\u521B\u5EFA\u65B0\u8D44\u6E90\u65F6\u4F7F\u7528</li></ul></li><li>Set-Cookie <ul><li>\u670D\u52A1\u7AEF\u53EF\u4EE5\u8BBE\u7F6E\u5BA2\u6237\u7AEF\u7684cookie</li></ul></li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><h2 id="tcp" tabindex="-1"><a class="header-anchor" href="#tcp" aria-hidden="true">#</a> TCP</h2><p>TCP\u662F\u4E00\u4E2A\u4F20\u8F93\u5C42\u534F\u8BAE\uFF0C\u63D0\u4F9B\u53EF\u9760\u4F20\u8F93\uFF0C\u652F\u6301\u5168\u53CC\u5DE5\uFF0C\u662F\u4E00\u4E2A\u8FDE\u63A5\u5BFC\u5411\u7684\u534F\u8BAE\u3002</p><p><strong>\u53CC\u5DE5/\u5355\u5DE5</strong></p><p>\u5728\u4EFB\u4F55\u4E00\u4E2A\u65F6\u523B\uFF0C\u5982\u679C\u6570\u636E\u53EA\u80FD\u5355\u5411\u53D1\u9001\uFF0C\u5C31\u662F\u5355\u5DE5\u3002</p><p>\u5982\u679C\u5728\u67D0\u4E2A\u65F6\u523B\u6570\u636E\u53EF\u4EE5\u5411\u4E00\u4E2A\u65B9\u5411\u4F20\u8F93\uFF0C\u4E5F\u53EF\u4EE5\u5411\u53E6\u4E00\u4E2A\u65B9\u5411\u53CD\u65B9\u5411\u4F20\u8F93\uFF0C\u800C\u4E14\u4EA4\u66FF\u8FDB\u884C\uFF0C\u53EB\u4F5C\u534A\u53CC\u5DE5\uFF1B\u534A\u53CC\u5DE5\u9700\u8981\u81F3\u5C11 1 \u6761\u7EBF\u8DEF\u3002</p><p>\u5982\u679C\u4EFB\u4F55\u65F6\u523B\u6570\u636E\u90FD\u53EF\u4EE5\u53CC\u5411\u6536\u53D1\uFF0C\u8FD9\u5C31\u662F\u5168\u53CC\u5DE5\uFF0C\u5168\u53CC\u5DE5\u9700\u8981\u5927\u4E8E 1 \u6761\u7EBF\u8DEF\u3002</p><p>TCP \u662F\u4E00\u4E2A\u53CC\u5DE5\u534F\u8BAE\uFF0C\u6570\u636E\u4EFB\u4F55\u65F6\u5019\u90FD\u53EF\u4EE5\u53CC\u5411\u4F20\u8F93\u3002</p><p>\u8FD9\u5C31\u610F\u5473\u7740\u5BA2\u6237\u7AEF\u548C\u670D\u52A1\u7AEF\u53EF\u4EE5\u5E73\u7B49\u5730\u53D1\u9001\u3001\u63A5\u6536\u4FE1\u606F\u3002</p><p><strong>TCP\u534F\u8BAE\u7684\u4E3B\u8981\u7279\u70B9</strong></p><ul><li><p>TCP\u662F\u9762\u5411\u8FDE\u63A5\u7684\u8FD0\u8F93\u5C42\u534F\u8BAE\uFF1B\u6240\u8C13\u9762\u5411\u8FDE\u63A5\u5C31\u662F\u53CC\u65B9\u4F20\u8F93\u6570\u636E\u4E4B\u524D\uFF0C\u5FC5\u987B\u5148\u5EFA\u7ACB\u4E00\u6761\u901A\u9053\uFF0C\u4F8B\u5982\u4E09\u6B21\u63E1\u624B\u5C31\u662F\u5EFA\u8BAE\u901A\u9053\u7684\u4E00\u4E2A\u8FC7\u7A0B\uFF0C\u800C\u56DB\u6B21\u6325\u624B\u5219\u662F\u7ED3\u675F\u9500\u6BC1\u901A\u9053\u7684\u4E00\u4E2A\u5176\u4E2D\u8FC7\u7A0B\u3002</p></li><li><p>\u6BCF\u4E00\u6761TCP\u8FDE\u63A5\u53EA\u80FD\u6709\u4E24\u4E2A\u7AEF\u70B9\uFF08\u5373\u4E24\u4E2A\u5957\u63A5\u5B57\uFF09\uFF0C\u53EA\u80FD\u662F\u70B9\u5BF9\u70B9\u7684\uFF1B</p></li><li><p>TCP\u63D0\u4F9B\u53EF\u9760\u7684\u4F20\u8F93\u670D\u52A1\u3002\u4F20\u9001\u7684\u6570\u636E\u65E0\u5DEE\u9519\u3001\u4E0D\u4E22\u5931\u3001\u4E0D\u91CD\u590D\u3001\u6309\u5E8F\u5230\u8FBE\uFF1B</p></li><li><p>TCP\u63D0\u4F9B\u5168\u53CC\u5DE5\u901A\u4FE1\u3002\u5141\u8BB8\u901A\u4FE1\u53CC\u65B9\u7684\u5E94\u7528\u8FDB\u7A0B\u5728\u4EFB\u4F55\u65F6\u5019\u90FD\u53EF\u4EE5\u53D1\u9001\u6570\u636E\uFF0C\u56E0\u4E3A\u4E24\u7AEF\u90FD\u8BBE\u6709\u53D1\u9001\u7F13\u5B58\u548C\u63A5\u53D7\u7F13\u5B58\uFF1B</p></li><li><p>\u9762\u5411\u5B57\u8282\u6D41\u3002\u867D\u7136\u5E94\u7528\u7A0B\u5E8F\u4E0ETCP\u4EA4\u4E92\u662F\u4E00\u6B21\u4E00\u4E2A\u5927\u5C0F\u4E0D\u7B49\u7684\u6570\u636E\u5757\uFF0C\u4F46TCP\u628A\u8FD9\u4E9B\u6570\u636E\u770B\u6210\u4E00\u8FDE\u4E32\u65E0\u7ED3\u6784\u7684\u5B57\u8282\u6D41\uFF0C\u5B83\u4E0D\u4FDD\u8BC1\u63A5\u6536\u65B9\u6536\u5230\u7684\u6570\u636E\u5757\u548C\u53D1\u9001\u65B9\u53D1\u9001\u7684\u6570\u636E\u5757\u5177\u6709\u5BF9\u5E94\u5927\u5C0F\u5173\u7CFB\uFF0C\u4F8B\u5982\uFF0C\u53D1\u9001\u65B9\u5E94\u7528\u7A0B\u5E8F\u4EA4\u7ED9\u53D1\u9001\u65B9\u7684TCP10\u4E2A\u6570\u636E\u5757\uFF0C\u63A5\u6536\u65B9\u7684TCP\u53EF\u80FD\u53EA\u7528\u6536\u5230\u76844\u4E2A\u6570\u636E\u5757\u5B57\u8282\u6D41\u4EA4\u4ED8\u7ED9\u4E0A\u5C42\u7684\u5E94\u7528\u7A0B\u5E8F</p></li></ul><p><strong>TCP\u7684\u53EF\u9760\u6027\u539F\u7406</strong></p><p>\u53EF\u9760\u4F20\u8F93\u6709\u5982\u4E0B\u4E24\u4E2A\u7279\u70B9:</p><ol><li>\u4F20\u8F93\u4FE1\u9053\u65E0\u5DEE\u9519,\u4FDD\u8BC1\u4F20\u8F93\u6570\u636E\u6B63\u786E;</li><li>\u4E0D\u7BA1\u53D1\u9001\u65B9\u4EE5\u591A\u5FEB\u7684\u901F\u5EA6\u53D1\u9001\u6570\u636E,\u63A5\u6536\u65B9\u603B\u662F\u6765\u5F97\u53CA\u5904\u7406\u6536\u5230\u7684\u6570\u636E;</li></ol><p>\u9996\u5148\uFF0C\u91C7\u7528\u4E09\u6B21\u63E1\u624B\u6765\u5EFA\u7ACBTCP\u8FDE\u63A5\uFF0C\u56DB\u6B21\u63E1\u624B\u6765\u91CA\u653ETCP\u8FDE\u63A5\uFF0C\u4ECE\u800C\u4FDD\u8BC1\u5EFA\u7ACB\u7684\u4F20\u8F93\u4FE1\u9053\u662F\u53EF\u9760\u7684\u3002</p><p>\u5176\u6B21\uFF0CTCP\u91C7\u7528\u4E86\u8FDE\u7EEDARQ\u534F\u8BAE\uFF08\u56DE\u9000N(Go-back-N)\uFF1B\u8D85\u65F6\u81EA\u52A8\u91CD\u4F20\uFF09\u6765\u4FDD\u8BC1\u6570\u636E\u4F20\u8F93\u7684\u6B63\u786E\u6027\uFF0C\u4F7F\u7528\u6ED1\u52A8\u7A97\u53E3\u534F\u8BAE\u6765\u4FDD\u8BC1\u63A5\u65B9\u80FD\u591F\u53CA\u65F6\u5904\u7406\u6240\u63A5\u6536\u5230\u7684\u6570\u636E\uFF0C\u8FDB\u884C\u6D41\u91CF\u63A7\u5236\u3002</p><p>\u6700\u540E\uFF0CTCP\u4F7F\u7528\u6162\u5F00\u59CB\u3001\u62E5\u585E\u907F\u514D\u3001\u5FEB\u91CD\u4F20\u548C\u5FEB\u6062\u590D\u6765\u8FDB\u884C\u62E5\u585E\u63A7\u5236\uFF0C\u907F\u514D\u7F51\u7EDC\u62E5\u585E\u3002</p><h3 id="\u62A5\u6587\u6BB5" tabindex="-1"><a class="header-anchor" href="#\u62A5\u6587\u6BB5" aria-hidden="true">#</a> \u62A5\u6587\u6BB5</h3><p>TCP\u867D\u9762\u5411\u5B57\u8282\u6D41\uFF0C\u4F46\u4F20\u9001\u7684\u6570\u636E\u5355\u5143\u4E3A\u62A5\u6587\u6BB5</p><p>\u62A5\u6587\u6BB5 = \u9996\u90E8 + \u6570\u636E2\u90E8\u5206</p><p>TCP\u7684\u5168\u90E8\u529F\u80FD\u4F53\u73B0\u5728\u5B83\u9996\u90E8\u4E2D\u5404\u5B57\u6BB5\u7684\u4F5C\u7528</p><blockquote><ol><li>\u9996\u90E8\u524D20\u4E2A\u5B57\u7B26\u56FA\u5B9A\u3001\u540E\u9762\u67094n\u4E2A\u5B57\u8282\u662F\u6839\u636E\u9700\u800C\u589E\u52A0\u7684\u9009\u9879</li><li>\u6545 TCP\u9996\u90E8\u6700\u5C0F\u957F\u5EA6 = 20\u5B57\u8282</li></ol></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-8011660d-24c8-460f-ac3d-b97ad9c99b13.png" alt=""></p><p><strong>\u7AEF\u53E3</strong>\uFF1A</p><p>\u6E90\u7AEF\u53E3\u53F7\u548C\u76EE\u5730\u7AEF\u53E3\u5404\u536016\u4F4D\u4E24\u4E2A\u5B57\u8282\uFF0C\u4E5F\u5C31\u662F\u7AEF\u53E3\u7684\u8303\u56F4\u662F<code>2^16=65535</code></p><p>\u53E6\u59161024\u4EE5\u4E0B\u662F\u7CFB\u7EDF\u4FDD\u7559\u7684\uFF0C\u4ECE1024-65535\u662F\u7528\u6237\u4F7F\u7528\u7684\u7AEF\u53E3\u8303\u56F4</p><p><strong>seq\u5E8F\u53F7</strong>\uFF1A\u53604\u5B57\u8282\uFF0CTCP\u8FDE\u63A5\u4E2D\u4F20\u9001\u7684\u5B57\u8282\u6D41\u4E2D\u7684\u6BCF\u4E2A\u5B57\u8282\u90FD\u6309\u987A\u5E8F\u7F16\u53F7\u3002</p><p>\u4F8B\u5982\uFF1A\u4E00\u6BB5\u62A5\u6587\u7684\u5E8F\u53F7\u5B57\u6BB5\u503C\u662F107\uFF0C\u643A\u5E26\u7684\u6570\u636E\u662F100\u4E2A\u5B57\u6BB5\uFF0C\u4E0B\u4E00\u4E2A\u62A5\u6587\u6BB5\u5E8F\u53F7\u4ECE107+100=207\u5F00\u59CB\u3002</p><p><strong>ack\u786E\u8BA4\u53F7</strong>\uFF1A4\u4E2A\u5B57\u8282\uFF0C\u662F\u671F\u671B\u6536\u5230\u5BF9\u65B9\u4E0B\u4E00\u4E2A\u62A5\u6587\u6BB5\u7684\u7B2C\u4E00\u4E2A\u6570\u636E\u5B57\u8282\u7684\u5E8F\u53F7\u3002</p><p>\u4F8B\u5982\uFF1AB\u6536\u5230A\u53D1\u9001\u7684\u62A5\u6587\uFF0C\u5176\u5E8F\u53F7\u5B57\u6BB5\u662F301\uFF0C\u6570\u636E\u957F\u5EA6\u662F200\u5B57\u8282\uFF0C\u8868\u660EB\u6B63\u786E\u6536\u5230A\u53D1\u9001\u7684\u5230\u5E8F\u53F7500\u4E3A\u6B62\u7684\u6570\u636E\uFF08301+200-1=500\uFF09\uFF0CB\u671F\u671B\u6536\u5230A\u4E0B\u4E00\u4E2A\u6570\u636E\u5E8F\u53F7\u662F501\uFF0CB\u53D1\u9001\u7ED9A\u7684\u786E\u8BA4\u62A5\u6587\u6BB5\u4E2D\u628Aack\u786E\u8BA4\u53F7\u7F6E\u4E3A501\u3002</p><p><strong>\u6570\u636E\u504F\u79FB</strong>\uFF1A\u5934\u90E8\u6709\u53EF\u9009\u5B57\u6BB5\uFF0C\u957F\u5EA6\u4E0D\u56FA\u5B9A\uFF0C\u6307\u51FATCP\u62A5\u6587\u6BB5\u7684\u6570\u636E\u8D77\u59CB\u5904\u8DDD\u79BB\u62A5\u6587\u6BB5\u7684\u8D77\u59CB\u5904\u6709\u591A\u8FDC\u3002</p><p><strong>\u4FDD\u7559</strong>\uFF1A\u4FDD\u7559\u4ECA\u540E\u4F7F\u7528\u7684\uFF0C\u88AB\u6807\u4E3A1\u3002</p><p><strong>\u63A7\u5236\u4F4D</strong>\uFF1A\u75318\u4E2A\u6807\u5FD7\u4F4D\u7EC4\u6210\u3002\u6BCF\u4E2A\u6807\u5FD7\u4F4D\u8868\u793A\u4E00\u4E2A\u63A7\u5236\u529F\u80FD\u3002</p><p>\u5176\u4E2D\u4E3B\u8981\u76846\u4E2A\uFF1A</p><ul><li><p><strong>URG\u7D27\u6025\u6307\u9488\u6807\u5FD7</strong>\uFF0C\u4E3A1\u8868\u793A\u7D27\u6025\u6307\u9488\u6709\u6548\uFF0C\u4E3A0\u5FFD\u7565\u7D27\u6025\u6307\u9488\u3002</p></li><li><p><strong>ACK\u786E\u8BA4\u5E8F\u53F7\u6807\u5FD7</strong>\uFF0C\u4E3A1\u8868\u793A\u786E\u8BA4\u53F7\u6709\u6548\uFF0C\u4E3A0\u8868\u793A\u62A5\u6587\u4E0D\u542B\u786E\u8BA4\u4FE1\u606F\uFF0C\u5FFD\u7565\u786E\u8BA4\u53F7\u5B57\u6BB5\uFF0C\u4E0A\u9762\u7684\u786E\u8BA4\u53F7\u662F\u5426\u6709\u6548\u5C31\u662F\u901A\u8FC7\u8BE5\u6807\u8BC6\u63A7\u5236\u7684\u3002</p></li><li><p><strong>PSH\u6807\u5FD7</strong>\uFF0C\u4E3A1\u8868\u793A\u5E26\u6709push\u6807\u5FD7\u7684\u6570\u636E\uFF0C\u6307\u793A\u63A5\u6536\u65B9\u5728\u63A5\u6536\u5230\u8BE5\u62A5\u6587\u6BB5\u4EE5\u540E\uFF0C\u5E94\u5C3D\u5FEB\u5C06\u8BE5\u62A5\u6587\u6BB5\u4EA4\u7ED9\u5E94\u7528\u7A0B\u5E8F\uFF0C\u800C\u4E0D\u662F\u5728\u7F13\u51B2\u533A\u6392\u961F\u3002</p></li><li><p><strong>RST\u91CD\u7F6E\u8FDE\u63A5\u6807\u5FD7</strong>\uFF0C\u91CD\u7F6E\u56E0\u4E3A\u4E3B\u673A\u5D29\u6E83\u6216\u5176\u4ED6\u539F\u56E0\u800C\u51FA\u73B0\u9519\u8BEF\u7684\u8FDE\u63A5\uFF0C\u6216\u7528\u4E8E\u62D2\u7EDD\u975E\u6CD5\u7684\u62A5\u6587\u6BB5\u6216\u975E\u6CD5\u7684\u8FDE\u63A5\u3002</p></li><li><p><strong>SYN\u540C\u6B65\u5E8F\u53F7</strong>\uFF0C\u540C\u6B65\u5E8F\u53F7\uFF0C\u7528\u4E8E\u5EFA\u7ACB\u8FDE\u63A5\u8FC7\u7A0B\uFF0C\u5728\u8FDE\u63A5\u8BF7\u6C42\u4E2D\uFF0CSYN=1\u548CACK=0\u8868\u793A\u8BE5\u6570\u636E\u6BB5\u6CA1\u6709\u4F7F\u7528\u634E\u5E26\u7684\u786E\u8BA4\u57DF\uFF0C\u800C\u8FDE\u63A5\u5E94\u7B54\u634E\u5E26\u4E00\u4E2A\u786E\u8BA4\uFF0C\u5373SYN=1\u548CACK=1\u3002\u3002</p></li><li><p><strong>FIN\u7EC8\u6B62\u6807\u5FD7</strong>\uFF0C\u7528\u4E8E\u91CA\u653E\u8FDE\u63A5\uFF0C\u4E3A1\u65F6\u8868\u793A\u53D1\u9001\u65B9\u6CA1\u6709\u53D1\u9001\u4E86\u3002</p></li></ul><p><strong>\u7A97\u53E3</strong>\uFF1A\u6ED1\u52A8\u7A97\u53E3\u5927\u5C0F\uFF0C\u7528\u6765\u544A\u77E5\u53D1\u9001\u7AEF\u63A5\u6536\u7AEF\u7F13\u5B58\u5927\u5C0F\uFF0C\u4EE5\u6B64\u63A7\u5236\u53D1\u9001\u7AEF\u53D1\u9001\u6570\u636E\u7684\u901F\u7387\uFF0C\u4ECE\u800C\u8FBE\u5230\u6D41\u91CF\u63A7\u5236\u3002</p><p><strong>\u6821\u9A8C\u548C</strong>\uFF1A\u5947\u5076\u6821\u9A8C\uFF0C\u6B64\u6821\u9A8C\u548C\u662F\u5BF9\u6574\u4E2A\u7684TCP\u62A5\u6587\u6BB5\uFF08\u5305\u62ECTCP\u5934\u90E8\u548CTCP\u6570\u636E\uFF09\uFF0C\u4EE516\u4F4D\u8FDB\u884C\u8BA1\u7B97\u6240\u5F97\uFF0C\u7531\u53D1\u9001\u7AEF\u8BA1\u7B97\u548C\u5B58\u50A8\uFF0C\u63A5\u6536\u7AEF\u8FDB\u884C\u9A8C\u8BC1\u3002</p><p><strong>\u7D27\u6025\u6307\u9488</strong>\uFF1A\u53EA\u6709\u63A7\u5236\u4F4D\u4E2D\u7684URG\u4E3A1\u65F6\u624D\u6709\u6548\uFF0C\u6307\u51FA\u672C\u62A5\u6587\u6BB5\u4E2D\u7684\u7D27\u6025\u6570\u636E\u7684\u5B57\u8282\u6570\u3002</p><p><strong>\u9009\u9879</strong>\uFF1A\u5176\u957F\u5EA6\u53EF\u53D8\uFF0C\u5B9A\u4E49\u5176\u4ED6\u7684\u53EF\u9009\u53C2\u6570\u3002</p><h3 id="\u7C98\u5305\u4E0E\u62C6\u5305" tabindex="-1"><a class="header-anchor" href="#\u7C98\u5305\u4E0E\u62C6\u5305" aria-hidden="true">#</a> \u7C98\u5305\u4E0E\u62C6\u5305</h3><p>TCP\u662F\u9762\u5411\u5B57\u8282\u6D41\u7684\u534F\u8BAE\uFF0C\u628A\u4E0A\u5C42\u5E94\u7528\u5C42\u7684\u6570\u636E\u770B\u6210\u5B57\u8282\u6D41\uFF0C\u6240\u4EE5\u5B83\u53D1\u9001\u7684\u4E0D\u662F\u56FA\u5B9A\u5927\u5C0F\u7684\u6570\u636E\u5305\uFF0CTCP\u534F\u8BAE\u4E5F\u6CA1\u6709\u5B57\u6BB5\u8BF4\u660E\u53D1\u9001\u6570\u636E\u5305\u7684\u5927\u5C0F\u3002</p><p>\u800C\u4E14TCP\u4E0D\u4FDD\u8BC1\u63A5\u53D7\u65B9\u5E94\u7528\u7A0B\u5E8F\u6536\u5230\u7684\u6570\u636E\u5757\u548C\u53D1\u9001\u5E94\u7528\u7A0B\u5E8F\u53D1\u9001\u7684\u6570\u636E\u5757\u5177\u6709\u5BF9\u5E94\u7684\u5927\u5C0F\u5173\u7CFB</p><p>\u6BD4\u5982\u53D1\u9001\u65B9\u5E94\u7528\u7A0B\u5E8F\u4EA4\u7ED9\u53D1\u9001\u65B9<code>TCP</code> 10\u4E2A\u6570\u636E\u5757\uFF0C\u63A5\u53D7\u65B9TCP\u53EF\u80FD\u53EA\u7528\u4E864\u4E2A\u6570\u636E\u5757\u5C31\u5B8C\u6574\u7684\u628A\u63A5\u53D7\u5230\u7684\u5B57\u8282\u6D41\u4EA4\u7ED9\u4E86\u4E0A\u5C42\u5E94\u7528\u7A0B\u5E8F\u3002</p><p>TCP\u5E95\u5C42\u5E76\u4E0D\u4E86\u89E3\u4E0A\u5C42\u4E1A\u52A1\u6570\u636E\u7684\u5177\u4F53\u542B\u4E49\uFF0C\u5B83\u4F1A\u6839\u636ETCP\u7F13\u51B2\u533A\u7684\u5B9E\u9645\u60C5\u51B5\u8FDB\u884C\u5305\u7684\u5212\u5206\uFF0C\u6240\u4EE5\u5728\u4E1A\u52A1\u4E0A\u8BA4\u4E3A\uFF0C\u4E00\u4E2A\u5B8C\u6574\u7684\u5305\u53EF\u80FD\u4F1A\u88ABTCP\u62C6\u5206\u6210\u591A\u4E2A\u5305\u8FDB\u884C\u53D1\u9001\uFF0C\u4E5F\u6709\u53EF\u80FD\u628A\u591A\u4E2A\u5C0F\u7684\u5305\u5C01\u88C5\u6210\u4E00\u4E2A\u5927\u7684\u6570\u636E\u5305\u53D1\u9001\uFF0C\u8FD9\u5C31\u662F\u6240\u8C13\u7684TCP\u7C98\u5305\u548C\u62C6\u5305\u95EE\u9898</p><p><strong>TCP\u7C98\u5305/\u62C6\u5305\u89E3\u51B3\u7B56\u7565</strong></p><p>\u7531\u4E8ETCP\u65E0\u6CD5\u7406\u89E3\u4E0A\u4E00\u5C42\u7684\u4E1A\u52A1\u6570\u636E\u7279\u70B9\uFF0C\u6240\u4EE5TCP\u662F\u65E0\u6CD5\u4FDD\u8BC1\u53D1\u9001\u7684\u6570\u636E\u5305\u4E0D\u53D1\u751F\u7C98\u5305\u548C\u62C6\u5305\uFF0C\u8FD9\u4E2A\u95EE\u9898\u53EA\u80FD\u901A\u8FC7\u4E0A\u5C42\u7684\u534F\u8BAE\u6808\u8BBE\u8BA1\u6765\u89E3\u51B3\uFF0C\u89E3\u51B3\u601D\u8DEF\u6709\u4E00\u4E0B\u51E0\u79CD\uFF1A</p><ul><li><p>\u6D88\u606F\u5B9A\u957F\uFF1A\u6BCF\u4E2A\u53D1\u9001\u7684\u6570\u636E\u5305\u5927\u5C0F\u56FA\u5B9A\uFF0C\u6BD4\u5982100\u5B57\u8282\uFF0C\u4E0D\u8DB3100\u5B57\u8282\u7684\u7528\u7A7A\u683C\u8865\u5145\uFF0C\u63A5\u53D7\u65B9\u53D6\u6570\u636E\u7684\u65F6\u5019\u6839\u636E\u8FD9\u4E2A\u957F\u5EA6\u6765\u8BFB\u53D6\u6570\u636E</p></li><li><p>\u6D88\u606F\u672B\u5C3E\u589E\u52A0\u6362\u884C\u7B26\u6765\u8868\u793A\u4E00\u6761\u5B8C\u6574\u7684\u6D88\u606F\uFF1A\u63A5\u6536\u65B9\u8BFB\u53D6\u7684\u65F6\u5019\u6839\u636E\u6362\u884C\u7B26\u6765\u5224\u65AD\u662F\u5426\u662F\u4E00\u6761\u5B8C\u6574\u7684\u6D88\u606F\uFF0C\u5982\u679C\u6D88\u606F\u7684\u5185\u5BB9\u4E5F\u5305\u542B\u6362\u884C\u7B26\uFF0C\u90A3\u4E48\u8FD9\u79CD\u65B9\u5F0F\u5C31\u4E0D\u5408\u9002\u4E86\u3002</p></li><li><p>\u5C06\u6D88\u606F\u5206\u4E3A\u6D88\u606F\u5934\u548C\u6D88\u606F\u5C3E\u4E24\u90E8\u5206\uFF0C\u6D88\u606F\u5934\u6307\u5B9A\u6570\u636E\u957F\u5EA6\uFF0C\u6839\u636E\u6D88\u606F\u957F\u5EA6\u6765\u8BFB\u53D6\u5B8C\u6574\u7684\u6D88\u606F\uFF0C\u4F8B\u5982UDP\u534F\u8BAE\u662F\u8FD9\u4E48\u8BBE\u8BA1\u7684\uFF0C\u7528\u4E24\u4E2A\u5B57\u8282\u6765\u8868\u793A\u6D88\u606F\u957F\u5EA6\uFF0C\u6240\u4EE5UDP\u4E0D\u5B58\u5728\u7C98\u5305\u548C\u62C6\u5305\u95EE\u9898\u3002</p></li></ul><h3 id="\u4E09\u6B21\u63E1\u624B" tabindex="-1"><a class="header-anchor" href="#\u4E09\u6B21\u63E1\u624B" aria-hidden="true">#</a> \u4E09\u6B21\u63E1\u624B</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-f6a9438e-4eb8-4573-9ef5-30e07b8c31df.png" alt=""></p><p><strong>\u7B2C\u4E00\u6B21\u63E1\u624B</strong>\uFF1A</p><p>\u5BA2\u6237\u7AEF\u5C06TCP\u62A5\u6587\u6807\u5FD7\u4F4D<code>SYN</code>\u7F6E\u4E3A1\uFF0C\u968F\u673A\u4EA7\u751F\u4E00\u4E2A\u5E8F\u53F7\u503C<code>seq=J</code>\uFF0C\u4FDD\u5B58\u5728TCP\u9996\u90E8\u7684\u5E8F\u5217\u53F7\u5B57\u6BB5\u91CC\uFF0C\u6307\u660E\u5BA2\u6237\u7AEF\u6253\u7B97\u8FDE\u63A5\u7684\u670D\u52A1\u5668\u7684\u7AEF\u53E3\uFF0C\u5E76\u5C06\u8BE5\u6570\u636E\u5305\u53D1\u9001\u7ED9\u670D\u52A1\u5668\u7AEF\uFF0C\u53D1\u9001\u5B8C\u6BD5\u540E\uFF0C\u5BA2\u6237\u7AEF\u8FDB\u5165<code>SYN_SENT</code>\u72B6\u6001\uFF0C\u7B49\u5F85\u670D\u52A1\u5668\u7AEF\u786E\u8BA4\u3002</p><p><strong>\u7B2C\u4E8C\u6B21\u63E1\u624B</strong>\uFF1A</p><p>\u670D\u52A1\u5668\u7AEF\u6536\u5230\u6570\u636E\u5305\u540E\u7531\u6807\u5FD7\u4F4D<code>SYN=1</code>\u77E5\u9053\u5BA2\u6237\u7AEF\u8BF7\u6C42\u5EFA\u7ACB\u8FDE\u63A5\uFF0C\u670D\u52A1\u5668\u7AEF\u5C06TCP\u62A5\u6587\u6807\u5FD7\u4F4DSYN\u548CACK\u90FD\u7F6E\u4E3A1\uFF0C<code>ack=J+1</code>\uFF0C\u968F\u673A\u4EA7\u751F\u4E00\u4E2A\u5E8F\u53F7\u503C<code>seq=K</code>\uFF0C\u5E76\u5C06\u8BE5\u6570\u636E\u5305\u53D1\u9001\u7ED9\u5BA2\u6237\u7AEF\u4EE5\u786E\u8BA4\u8FDE\u63A5\u8BF7\u6C42\uFF0C\u670D\u52A1\u5668\u7AEF\u8FDB\u5165<code>SYN_RCVD</code>\u72B6\u6001\u3002</p><p><strong>\u7B2C\u4E09\u6B21\u63E1\u624B</strong>\uFF1A</p><p>\u5BA2\u6237\u7AEF\u6536\u5230\u786E\u8BA4\u540E\uFF0C\u68C0\u67E5ack\u662F\u5426\u4E3A<code>J+1</code>\uFF0CACK\u662F\u5426\u4E3A1\uFF0C\u5982\u679C\u6B63\u786E\u5219\u5C06\u6807\u5FD7\u4F4DACK\u7F6E\u4E3A1\uFF0C<code>ack=K+1</code>\uFF0C\u5E76\u5C06\u8BE5\u6570\u636E\u5305\u53D1\u9001\u7ED9\u670D\u52A1\u5668\u7AEF\uFF0C\u670D\u52A1\u5668\u7AEF\u68C0\u67E5ack\u662F\u5426\u4E3A<code>K+1</code>\uFF0CACK\u662F\u5426\u4E3A1\uFF0C\u5982\u679C\u6B63\u786E\u5219\u8FDE\u63A5\u5EFA\u7ACB\u6210\u529F\uFF0C\u5BA2\u6237\u7AEF\u548C\u670D\u52A1\u5668\u7AEF\u8FDB\u5165<code>ESTABLISHED</code>\u72B6\u6001\uFF0C\u5B8C\u6210\u4E09\u6B21\u63E1\u624B\uFF0C\u968F\u540E\u5BA2\u6237\u7AEF\u4E0E\u670D\u52A1\u5668\u7AEF\u4E4B\u95F4\u53EF\u4EE5\u5F00\u59CB\u4F20\u8F93\u6570\u636E\u4E86\u3002</p><p><strong>\u4E0A\u9762\u5199\u7684ack\u548CACK\uFF0C\u4E0D\u662F\u540C\u4E00\u4E2A\u6982\u5FF5\uFF1A</strong></p><ul><li><p>\u5C0F\u5199\u7684ack\u4EE3\u8868\u7684\u662F\u5934\u90E8\u7684\u786E\u8BA4\u53F7Acknowledge number\uFF0C \u7F29\u5199ack\uFF0C\u662F\u5BF9\u4E0A\u4E00\u4E2A\u5305\u7684\u5E8F\u53F7\u8FDB\u884C\u786E\u8BA4\u7684\u53F7\uFF0C<code>ack=seq+1</code>\u3002</p></li><li><p>\u5927\u5199\u7684ACK\uFF0C\u5219\u662F\u6211\u4EEC\u4E0A\u9762\u8BF4\u7684TCP\u9996\u90E8\u7684\u6807\u5FD7\u4F4D\uFF0C\u7528\u4E8E\u6807\u5FD7\u7684TCP\u5305\u662F\u5426\u5BF9\u4E0A\u4E00\u4E2A\u5305\u8FDB\u884C\u4E86\u786E\u8BA4\u64CD\u4F5C\uFF0C\u5982\u679C\u786E\u8BA4\u4E86\uFF0C\u5219\u628AACK\u6807\u5FD7\u4F4D\u8BBE\u7F6E\u62101\u3002</p></li></ul><p><strong>TCP\u4E3A\u4EC0\u4E48\u4E09\u6B21\u63E1\u624B\u800C\u4E0D\u662F\u4E24\u6B21\u63E1\u624B</strong></p><ul><li><p>\u4E3A\u4E86\u5B9E\u73B0\u53EF\u9760\u6570\u636E\u4F20\u8F93\uFF0C TCP \u534F\u8BAE\u7684\u901A\u4FE1\u53CC\u65B9\uFF0C \u90FD\u5FC5\u987B\u7EF4\u62A4\u4E00\u4E2A\u5E8F\u5217\u53F7\uFF0C \u4EE5\u6807\u8BC6\u53D1\u9001\u51FA\u53BB\u7684\u6570\u636E\u5305\u4E2D\uFF0C \u54EA\u4E9B\u662F\u5DF2\u7ECF\u88AB\u5BF9\u65B9\u6536\u5230\u7684\u3002 \u4E09\u6B21\u63E1\u624B\u7684\u8FC7\u7A0B\u5373\u662F\u901A\u4FE1\u53CC\u65B9\u76F8\u4E92\u544A\u77E5\u5E8F\u5217\u53F7\u8D77\u59CB\u503C\uFF0C \u5E76\u786E\u8BA4\u5BF9\u65B9\u5DF2\u7ECF\u6536\u5230\u4E86\u5E8F\u5217\u53F7\u8D77\u59CB\u503C\u7684\u5FC5\u7ECF\u6B65\u9AA4</p></li><li><p>\u5982\u679C\u53EA\u662F\u4E24\u6B21\u63E1\u624B\uFF0C \u81F3\u591A\u53EA\u6709\u8FDE\u63A5\u53D1\u8D77\u65B9\u7684\u8D77\u59CB\u5E8F\u5217\u53F7\u80FD\u88AB\u786E\u8BA4\uFF0C \u53E6\u4E00\u65B9\u9009\u62E9\u7684\u5E8F\u5217\u53F7\u5219\u5F97\u4E0D\u5230\u786E\u8BA4</p></li></ul><p><strong>\u300A\u8BA1\u7B97\u673A\u7F51\u7EDC\u300B\u4E2D\u662F\u8FD9\u6837\u8BF4\u7684\uFF1A</strong></p><p>\u4E3A\u4E86\u9632\u6B62\u5DF2\u5931\u6548\u7684\u8FDE\u63A5\u8BF7\u6C42\u62A5\u6587\u6BB5\u7A81\u7136\u53C8\u4F20\u9001\u5230\u4E86\u670D\u52A1\u7AEF\uFF0C\u56E0\u800C\u4EA7\u751F\u9519\u8BEF\u3002</p><blockquote><p>\u5728\u4E66\u4E2D\u540C\u65F6\u4E3E\u4E86\u4E00\u4E2A\u4F8B\u5B50\uFF0C\u5982\u4E0B\uFF1A</p></blockquote><p>\u5047\u5982<code>client</code>\u53D1\u51FA\u7684\u7B2C\u4E00\u4E2A\u8FDE\u63A5\u8BF7\u6C42\u62A5\u6587\u6BB5\u5E76\u6CA1\u6709\u4E22\u5931\uFF0C\u800C\u662F\u5728\u67D0\u4E2A\u7F51\u7EDC\u7ED3\u70B9\u957F\u65F6\u95F4\u7684\u6EDE\u7559\u4E86\uFF0C\u4EE5\u81F4\u5EF6\u8BEF\u5230\u8FDE\u63A5\u91CA\u653E\u4EE5\u540E\u7684\u67D0\u4E2A\u65F6\u95F4\u624D\u5230\u8FBE<code>server</code>\uFF0C\u672C\u6765\u8FD9\u662F\u4E00\u4E2A\u65E9\u5DF2\u5931\u6548\u7684\u62A5\u6587\u6BB5\uFF0C\u4F46<code>server</code>\u6536\u5230\u6B64\u5931\u6548\u7684\u8FDE\u63A5\u8BF7\u6C42\u62A5\u6587\u6BB5\u540E\uFF0C\u5C31\u8BEF\u8BA4\u4E3A\u662Fclient\u518D\u6B21\u53D1\u51FA\u7684\u4E00\u4E2A\u65B0\u7684\u8FDE\u63A5\u8BF7\u6C42\u3002</p><p>\u4E8E\u662F\u5C31\u5411client\u53D1\u51FA\u786E\u8BA4\u62A5\u6587\u6BB5\uFF0C\u540C\u610F\u5EFA\u7ACB\u8FDE\u63A5\uFF0C\u5047\u8BBE\u4E0D\u91C7\u7528<strong>\u4E09\u6B21\u63E1\u624B</strong>\uFF0C\u90A3\u4E48\u53EA\u8981server\u53D1\u51FA\u786E\u8BA4\uFF0C\u65B0\u7684\u8FDE\u63A5\u5C31\u5EFA\u7ACB\u4E86\uFF0C\u7531\u4E8E\u73B0\u5728client\u5E76\u6CA1\u6709\u53D1\u51FA\u5EFA\u7ACB\u8FDE\u63A5\u7684\u8BF7\u6C42\uFF0C\u56E0\u6B64\u4E0D\u4F1A\u7406\u776Cserver\u7684\u786E\u8BA4\uFF0C\u4E5F\u4E0D\u4F1A\u5411server\u53D1\u9001\u6570\u636E\u3002</p><p>\u4F46server\u5374\u4EE5\u4E3A\u65B0\u7684\u8FDE\u63A5\u5DF2\u7ECF\u5EFA\u7ACB\uFF0C\u5E76\u4E00\u76F4\u7B49\u5F85<code>client</code>\u53D1\u6765\u6570\u636E\uFF0C\u8FD9\u6837\uFF0Cserver\u7684\u5F88\u591A\u8D44\u6E90\u5C31\u767D\u767D\u6D6A\u8D39\u6389\u4E86\u3002</p><p>\u91C7\u7528<strong>\u4E09\u6B21\u63E1\u624B</strong>\u7684\u529E\u6CD5\u53EF\u4EE5\u9632\u6B62\u4E0A\u8FF0\u73B0\u8C61\u53D1\u751F\uFF0C\u4F8B\u5982\u521A\u624D\u90A3\u79CD\u60C5\u51B5\uFF0Cclient\u4E0D\u4F1A\u5411<code>server</code>\u7684\u786E\u8BA4\u53D1\u51FA\u786E\u8BA4\uFF0Cserver\u7531\u4E8E\u6536\u4E0D\u5230\u786E\u8BA4\uFF0C\u5C31\u77E5\u9053client\u5E76\u6CA1\u6709\u8981\u6C42\u5EFA\u7ACB\u8FDE\u63A5\u3002</p><p><strong>\u4EC0\u4E48\u662F\u534A\u8FDE\u63A5\u961F\u5217</strong></p><p>\u670D\u52A1\u5668\u7B2C\u4E00\u6B21\u6536\u5230\u5BA2\u6237\u7AEF\u7684 SYN \u4E4B\u540E\uFF0C\u5C31\u4F1A\u5904\u4E8E <code>SYN_RCVD</code>\u72B6\u6001\uFF0C\u6B64\u65F6\u53CC\u65B9\u8FD8\u6CA1\u6709\u5B8C\u5168\u5EFA\u7ACB\u5176\u8FDE\u63A5\uFF0C\u670D\u52A1\u5668\u4F1A\u628A\u6B64\u79CD\u72B6\u6001\u4E0B\u8BF7\u6C42\u8FDE\u63A5\u653E\u5728\u4E00\u4E2A\u961F\u5217\u91CC\uFF0C\u6211\u4EEC\u628A\u8FD9\u79CD\u961F\u5217\u79F0\u4E4B\u4E3A<strong>\u534A\u8FDE\u63A5\u961F\u5217</strong>\u3002</p><p>\u5F53\u7136\u8FD8\u6709\u4E00\u4E2A<strong>\u5168\u8FDE\u63A5\u961F\u5217</strong>\uFF0C\u5C31\u662F\u5DF2\u7ECF\u5B8C\u6210\u4E09\u6B21\u63E1\u624B\uFF0C\u5EFA\u7ACB\u8D77\u8FDE\u63A5\u7684\u5C31\u4F1A\u653E\u5728\u5168\u8FDE\u63A5\u961F\u5217\u4E2D\u3002\u5982\u679C\u961F\u5217\u6EE1\u4E86\u5C31\u6709\u53EF\u80FD\u4F1A\u51FA\u73B0\u4E22\u5305\u73B0\u8C61\u3002</p><p>\u8865\u5145\u4E00\u70B9\u5173\u4E8E<strong>SYN-ACK \u91CD\u4F20\u6B21\u6570</strong>\u7684\u95EE\u9898\uFF1A</p><p>\u670D\u52A1\u5668\u53D1\u9001\u5B8CSYN\uFF0DACK\u5305\uFF0C\u5982\u679C\u672A\u6536\u5230\u5BA2\u6237\u786E\u8BA4\u5305\uFF0C\u670D\u52A1\u5668\u8FDB\u884C\u9996\u6B21\u91CD\u4F20\uFF0C\u7B49\u5F85\u4E00\u6BB5\u65F6\u95F4\u4ECD\u672A\u6536\u5230\u5BA2\u6237\u786E\u8BA4\u5305\uFF0C\u8FDB\u884C\u7B2C\u4E8C\u6B21\u91CD\u4F20\uFF0C\u5982\u679C\u91CD\u4F20\u6B21\u6570\u8D85\u8FC7\u7CFB\u7EDF\u89C4\u5B9A\u7684\u6700\u5927\u91CD\u4F20\u6B21\u6570\uFF0C\u7CFB\u7EDF\u5C06\u8BE5\u8FDE\u63A5\u4FE1\u606F\u4ECE\u534A\u8FDE\u63A5\u961F\u5217\u4E2D\u5220\u9664\u3002</p><p><strong>\u4E09\u6B21\u63E1\u624B\u8FC7\u7A0B\u4E2D\u53EF\u4EE5\u643A\u5E26\u6570\u636E\u5417</strong></p><p>\u5176\u5B9E\u7B2C\u4E09\u6B21\u63E1\u624B\u7684\u65F6\u5019\uFF0C\u662F\u53EF\u4EE5\u643A\u5E26\u6570\u636E\u7684\uFF0C\u4E5F\u5C31\u662F\u8BF4\uFF0C\u7B2C\u4E00\u6B21\u3001\u7B2C\u4E8C\u6B21\u63E1\u624B\u4E0D\u53EF\u4EE5\u643A\u5E26\u6570\u636E\uFF0C\u800C\u7B2C\u4E09\u6B21\u63E1\u624B\u662F\u53EF\u4EE5\u643A\u5E26\u6570\u636E\u7684\u3002</p><p>\u5047\u5982\u7B2C\u4E00\u6B21\u63E1\u624B\u53EF\u4EE5\u643A\u5E26\u6570\u636E\u7684\u8BDD\uFF0C\u5982\u679C\u6709\u4EBA\u8981\u6076\u610F\u653B\u51FB\u670D\u52A1\u5668\uFF0C\u90A3\u4ED6\u6BCF\u6B21\u90FD\u5728\u7B2C\u4E00\u6B21\u63E1\u624B\u4E2D\u7684 SYN \u62A5\u6587\u4E2D\u653E\u5165\u5927\u91CF\u7684\u6570\u636E\uFF0C\u56E0\u4E3A\u653B\u51FB\u8005\u6839\u672C\u5C31\u4E0D\u7406\u670D\u52A1\u5668\u7684\u63A5\u6536\u3001\u53D1\u9001\u80FD\u529B\u662F\u5426\u6B63\u5E38\uFF0C\u7136\u540E\u75AF\u72C2\u7740\u91CD\u590D\u53D1 SYN \u62A5\u6587\u7684\u8BDD\uFF0C\u8FD9\u4F1A\u8BA9\u670D\u52A1\u5668\u82B1\u8D39\u5F88\u591A\u65F6\u95F4\u3001\u5185\u5B58\u7A7A\u95F4\u6765\u63A5\u6536\u8FD9\u4E9B\u62A5\u6587\u3002\u4E5F\u5C31\u662F\u8BF4\uFF0C\u7B2C\u4E00\u6B21\u63E1\u624B\u53EF\u4EE5\u653E\u6570\u636E\u7684\u8BDD\uFF0C\u5176\u4E2D\u4E00\u4E2A\u7B80\u5355\u7684\u539F\u56E0\u5C31\u662F\u4F1A\u8BA9\u670D\u52A1\u5668\u66F4\u52A0\u5BB9\u6613\u53D7\u5230\u653B\u51FB\u4E86\u3002</p><p>\u800C\u5BF9\u4E8E\u7B2C\u4E09\u6B21\u7684\u8BDD\uFF0C\u6B64\u65F6\u5BA2\u6237\u7AEF\u5DF2\u7ECF\u5904\u4E8E established \u72B6\u6001\uFF0C\u4E5F\u5C31\u662F\u8BF4\uFF0C\u5BF9\u4E8E\u5BA2\u6237\u7AEF\u6765\u8BF4\uFF0C\u4ED6\u5DF2\u7ECF\u5EFA\u7ACB\u8D77\u8FDE\u63A5\u4E86\uFF0C\u5E76\u4E14\u4E5F\u5DF2\u7ECF\u77E5\u9053\u670D\u52A1\u5668\u7684\u63A5\u6536\u3001\u53D1\u9001\u80FD\u529B\u662F\u6B63\u5E38\u7684\u4E86\uFF0C\u6240\u4EE5\u80FD\u643A\u5E26\u6570\u636E\u6CA1\u5565\u6BDB\u75C5\u3002</p><h3 id="\u56DB\u6B21\u6325\u624B" tabindex="-1"><a class="header-anchor" href="#\u56DB\u6B21\u6325\u624B" aria-hidden="true">#</a> \u56DB\u6B21\u6325\u624B</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-4a5e455f-5cf8-47a6-8fe4-a4c83a445f77.png" alt=""></p><p>\u6325\u624B\u8BF7\u6C42\u53EF\u4EE5\u662FClient\u7AEF\uFF0C\u4E5F\u53EF\u4EE5\u662FServer\u7AEF\u53D1\u8D77\u7684\uFF0C\u6211\u4EEC\u5047\u8BBE\u662FClient\u7AEF\u53D1\u8D77\uFF1A</p><ul><li><p>\u7B2C\u4E00\u6B21\u6325\u624B\uFF1A Client\u7AEF\u53D1\u8D77\u6325\u624B\u8BF7\u6C42\uFF0C\u5411Server\u7AEF\u53D1\u9001\u6807\u5FD7\u4F4D\u662FFIN\u62A5\u6587\u6BB5\uFF0C\u8BBE\u7F6E\u5E8F\u5217\u53F7seq\uFF0C\u6B64\u65F6\uFF0CClient\u7AEF\u8FDB\u5165<code>FIN_WAIT_1</code>\u72B6\u6001\uFF0C\u8FD9\u8868\u793AClient\u7AEF\u6CA1\u6709\u6570\u636E\u8981\u53D1\u9001\u7ED9Server\u7AEF\u4E86\u3002</p></li><li><p>\u7B2C\u4E8C\u6B21\u6325\u624B\uFF1AServer\u7AEF\u6536\u5230\u4E86Client\u7AEF\u53D1\u9001\u7684FIN\u62A5\u6587\u6BB5\uFF0C\u5411Client\u7AEF\u8FD4\u56DE\u4E00\u4E2A\u6807\u5FD7\u4F4D\u662FACK\u7684\u62A5\u6587\u6BB5\uFF0Cack\u8BBE\u4E3Aseq\u52A01\uFF0CClient\u7AEF\u8FDB\u5165<code>FIN_WAIT_2</code>\u72B6\u6001\uFF0CServer\u7AEF\u544A\u8BC9Client\u7AEF\uFF0C\u6211\u786E\u8BA4\u5E76\u540C\u610F\u4F60\u7684\u5173\u95ED\u8BF7\u6C42\u3002</p></li><li><p>\u7B2C\u4E09\u6B21\u6325\u624B\uFF1A Server\u7AEF\u5411Client\u7AEF\u53D1\u9001\u6807\u5FD7\u4F4D\u662FFIN\u7684\u62A5\u6587\u6BB5\uFF0C\u8BF7\u6C42\u5173\u95ED\u8FDE\u63A5\uFF0C\u540C\u65F6Client\u7AEF\u8FDB\u5165<code>LAST_ACK</code>\u72B6\u6001\u3002</p></li><li><p>\u7B2C\u56DB\u6B21\u6325\u624B \uFF1A Client\u7AEF\u6536\u5230Server\u7AEF\u53D1\u9001\u7684FIN\u62A5\u6587\u6BB5\uFF0C\u5411Server\u7AEF\u53D1\u9001\u6807\u5FD7\u4F4D\u662FACK\u7684\u62A5\u6587\u6BB5\uFF0C\u7136\u540EClient\u7AEF\u8FDB\u5165<code>TIME_WAIT</code>\u72B6\u6001\uFF0CServer\u7AEF\u6536\u5230Client\u7AEF\u7684ACK\u62A5\u6587\u6BB5\u4EE5\u540E\uFF0C\u5C31\u5173\u95ED\u8FDE\u63A5\uFF0C\u6B64\u65F6\uFF0CClient\u7AEF\u7B49\u5F852MSL\u7684\u65F6\u95F4\u540E\u4F9D\u7136\u6CA1\u6709\u6536\u5230\u56DE\u590D\uFF0C\u5219\u8BC1\u660EServer\u7AEF\u5DF2\u6B63\u5E38\u5173\u95ED\uFF0C\u90A3\u597D\uFF0CClient\u7AEF\u4E5F\u53EF\u4EE5\u5173\u95ED\u8FDE\u63A5\u4E86\u3002</p></li></ul><p><strong>\u4E3A\u4EC0\u4E48\u8FDE\u63A5\u7684\u65F6\u5019\u662F\u4E09\u6B21\u63E1\u624B\uFF0C\u5173\u95ED\u7684\u65F6\u5019\u5374\u662F\u56DB\u6B21\u63E1\u624B\uFF1F</strong></p><p>\u5EFA\u7ACB\u8FDE\u63A5\u65F6\u56E0\u4E3A\u5F53Server\u7AEF\u6536\u5230Client\u7AEF\u7684SYN\u8FDE\u63A5\u8BF7\u6C42\u62A5\u6587\u540E\uFF0C\u53EF\u4EE5\u76F4\u63A5\u53D1\u9001SYN+ACK\u62A5\u6587\u3002\u5176\u4E2DACK\u62A5\u6587\u662F\u7528\u6765\u5E94\u7B54\u7684\uFF0CSYN\u62A5\u6587\u662F\u7528\u6765\u540C\u6B65\u7684\u3002\u6240\u4EE5\u5EFA\u7ACB\u8FDE\u63A5\u53EA\u9700\u8981\u4E09\u6B21\u63E1\u624B\u3002</p><p>\u7531\u4E8ETCP\u534F\u8BAE\u662F\u4E00\u79CD\u9762\u5411\u8FDE\u63A5\u7684\u3001\u53EF\u9760\u7684\u3001\u57FA\u4E8E\u5B57\u8282\u6D41\u7684\u8FD0\u8F93\u5C42\u901A\u4FE1\u534F\u8BAE\uFF0CTCP\u662F\u5168\u53CC\u5DE5\u6A21\u5F0F\u3002</p><p>\u8FD9\u5C31\u610F\u5473\u7740\uFF0C\u5173\u95ED\u8FDE\u63A5\u65F6\uFF0C\u5F53Client\u7AEF\u53D1\u51FAFIN\u62A5\u6587\u6BB5\u65F6\uFF0C\u53EA\u662F\u8868\u793AClient\u7AEF\u544A\u8BC9Server\u7AEF\u6570\u636E\u5DF2\u7ECF\u53D1\u9001\u5B8C\u6BD5\u4E86\u3002\u5F53Server\u7AEF\u6536\u5230FIN\u62A5\u6587\u5E76\u8FD4\u56DEACK\u62A5\u6587\u6BB5\uFF0C\u8868\u793A\u5B83\u5DF2\u7ECF\u77E5\u9053Client\u7AEF\u6CA1\u6709\u6570\u636E\u53D1\u9001\u4E86\uFF0C\u4F46\u662FServer\u7AEF\u8FD8\u662F\u53EF\u4EE5\u53D1\u9001\u6570\u636E\u5230Client\u7AEF\u7684\uFF0C\u6240\u4EE5Server\u5F88\u53EF\u80FD\u5E76\u4E0D\u4F1A\u7ACB\u5373\u5173\u95EDSOCKET\uFF0C\u76F4\u5230Server\u7AEF\u628A\u6570\u636E\u4E5F\u53D1\u9001\u5B8C\u6BD5\u3002</p><p>\u5F53Server\u7AEF\u4E5F\u53D1\u9001\u4E86FIN\u62A5\u6587\u6BB5\u65F6\uFF0C\u8FD9\u4E2A\u65F6\u5019\u5C31\u8868\u793AServer\u7AEF\u4E5F\u6CA1\u6709\u6570\u636E\u8981\u53D1\u9001\u4E86\uFF0C\u5C31\u4F1A\u544A\u8BC9Client\u7AEF\uFF0C\u6211\u4E5F\u6CA1\u6709\u6570\u636E\u8981\u53D1\u9001\u4E86\uFF0C\u4E4B\u540E\u5F7C\u6B64\u5C31\u4F1A\u6109\u5FEB\u7684\u4E2D\u65AD\u8FD9\u6B21TCP\u8FDE\u63A5\u3002</p><p><strong>\u4E3A\u4EC0\u4E48TIME_WAIT\u8981\u7B49\u5F852MSL\uFF1F</strong></p><p>MSL\uFF1A\u62A5\u6587\u6BB5\u6700\u5927\u751F\u5B58\u65F6\u95F4\uFF0C\u5B83\u662F\u4EFB\u4F55\u62A5\u6587\u6BB5\u88AB\u4E22\u5F03\u524D\u5728\u7F51\u7EDC\u5185\u7684\u6700\u957F\u65F6\u95F4\u3002</p><p>\u6709\u4EE5\u4E0B\u4E24\u4E2A\u539F\u56E0\uFF1A</p><ul><li>\u7B2C\u4E00\u70B9\uFF1A\u4FDD\u8BC1TCP\u534F\u8BAE\u7684\u5168\u53CC\u5DE5\u8FDE\u63A5\u80FD\u591F\u53EF\u9760\u5173\u95ED\uFF1A \u7531\u4E8EIP\u534F\u8BAE\u7684\u4E0D\u53EF\u9760\u6027\u6216\u8005\u662F\u5176\u5B83\u7F51\u7EDC\u539F\u56E0\uFF0C\u5BFC\u81F4\u4E86Server\u7AEF\u6CA1\u6709\u6536\u5230Client\u7AEF\u7684ACK\u62A5\u6587\uFF0C\u90A3\u4E48Server\u7AEF\u5C31\u4F1A\u5728\u8D85\u65F6\u4E4B\u540E\u91CD\u65B0\u53D1\u9001FIN\uFF0C\u5982\u679C\u6B64\u65F6Client\u7AEF\u7684\u8FDE\u63A5\u5DF2\u7ECF\u5173\u95ED\u5904\u4E8E<code>CLOESD</code>\u72B6\u6001\uFF0C\u90A3\u4E48\u91CD\u53D1\u7684FIN\u5C31\u627E\u4E0D\u5230\u5BF9\u5E94\u7684\u8FDE\u63A5\u4E86\uFF0C\u4ECE\u800C\u5BFC\u81F4\u8FDE\u63A5\u9519\u4E71\uFF0C\u6240\u4EE5\uFF0CClient\u7AEF\u53D1\u9001\u5B8C\u6700\u540E\u7684ACK\u4E0D\u80FD\u76F4\u63A5\u8FDB\u5165<code>CLOSED</code>\u72B6\u6001\uFF0C\u800C\u8981\u4FDD\u6301<code>TIME_WAIT</code>\uFF0C\u5F53\u518D\u6B21\u6536\u5230FIN\u7684\u65F6\u5019\uFF0C\u80FD\u591F\u4FDD\u8BC1\u5BF9\u65B9\u6536\u5230ACK\uFF0C\u6700\u540E\u6B63\u786E\u5173\u95ED\u8FDE\u63A5\u3002</li><li>\u7B2C\u4E8C\u70B9\uFF1A\u4FDD\u8BC1\u8FD9\u6B21\u8FDE\u63A5\u7684\u91CD\u590D\u6570\u636E\u6BB5\u4ECE\u7F51\u7EDC\u4E2D\u6D88\u5931 \u5982\u679CClient\u7AEF\u53D1\u9001\u6700\u540E\u7684ACK\u76F4\u63A5\u8FDB\u5165<code>CLOSED</code>\u72B6\u6001\uFF0C\u7136\u540E\u53C8\u518D\u5411Server\u7AEF\u53D1\u8D77\u4E00\u4E2A\u65B0\u8FDE\u63A5\uFF0C\u8FD9\u65F6\u4E0D\u80FD\u4FDD\u8BC1\u65B0\u8FDE\u63A5\u7684\u4E0E\u521A\u5173\u95ED\u7684\u8FDE\u63A5\u7684\u7AEF\u53E3\u53F7\u662F\u4E0D\u540C\u7684\uFF0C\u4E5F\u5C31\u662F\u65B0\u8FDE\u63A5\u548C\u8001\u8FDE\u63A5\u7684\u7AEF\u53E3\u53F7\u53EF\u80FD\u4E00\u6837\u4E86\uFF0C\u90A3\u4E48\u5C31\u53EF\u80FD\u51FA\u73B0\u95EE\u9898\uFF1A\u5982\u679C\u524D\u4E00\u6B21\u7684\u8FDE\u63A5\u67D0\u4E9B\u6570\u636E\u6EDE\u7559\u5728\u7F51\u7EDC\u4E2D\uFF0C\u8FD9\u4E9B\u5EF6\u8FDF\u6570\u636E\u5728\u5EFA\u7ACB\u65B0\u8FDE\u63A5\u540E\u5230\u8FBEClient\u7AEF\uFF0C\u7531\u4E8E\u65B0\u8001\u8FDE\u63A5\u7684\u7AEF\u53E3\u53F7\u548CIP\u90FD\u4E00\u6837\uFF0CTCP\u534F\u8BAE\u5C31\u8BA4\u4E3A\u5EF6\u8FDF\u6570\u636E\u662F\u5C5E\u4E8E\u65B0\u8FDE\u63A5\u7684\uFF0C\u65B0\u8FDE\u63A5\u5C31\u4F1A\u63A5\u6536\u5230\u810F\u6570\u636E\uFF0C\u8FD9\u6837\u5C31\u4F1A\u5BFC\u81F4\u6570\u636E\u5305\u6DF7\u4E71\uFF0C\u6240\u4EE5TCP\u8FDE\u63A5\u9700\u8981\u5728<code>TIME_WAIT</code>\u72B6\u6001\u7B49\u5F852\u500DMSL\uFF0C\u624D\u80FD\u4FDD\u8BC1\u672C\u6B21\u8FDE\u63A5\u7684\u6240\u6709\u6570\u636E\u5728\u7F51\u7EDC\u4E2D\u6D88\u5931\u3002</li></ul><h3 id="\u6D41\u91CF\u63A7\u5236" tabindex="-1"><a class="header-anchor" href="#\u6D41\u91CF\u63A7\u5236" aria-hidden="true">#</a> \u6D41\u91CF\u63A7\u5236</h3><p><strong>RTT\u548CRTO</strong></p><p>RTT\uFF1A\u53D1\u9001\u4E00\u4E2A\u6570\u636E\u5305\u5230\u6536\u5230\u5BF9\u5E94\u7684ACK\uFF0C\u6240\u82B1\u8D39\u7684\u65F6\u95F4</p><p>RTO\uFF1A\u91CD\u4F20\u65F6\u95F4\u95F4\u9694\uFF08TCP\u5728\u53D1\u9001\u4E00\u4E2A\u6570\u636E\u5305\u540E\u4F1A\u542F\u52A8\u4E00\u4E2A\u91CD\u4F20\u5B9A\u65F6\u5668\uFF0CRTO\u5373\u5B9A\u65F6\u5668\u7684\u91CD\u4F20\u65F6\u95F4\uFF09</p><p>\u5F00\u59CB\u9884\u5148\u7B97\u4E00\u4E2A\u5B9A\u65F6\u5668\u65F6\u95F4\uFF0C\u5982\u679C\u56DE\u590DACK\uFF0C\u91CD\u4F20\u5B9A\u65F6\u5668\u5C31\u81EA\u52A8\u5931\u6548\uFF0C\u5373\u4E0D\u9700\u8981\u91CD\u4F20\uFF1B\u5982\u679C\u6CA1\u6709\u56DE\u590DACK\uFF0CRTO\u5B9A\u65F6\u5668\u65F6\u95F4\u5C31\u5230\u4E86\uFF0C\u91CD\u4F20\u3002</p><p>RTO\u662F\u672C\u6B21\u53D1\u9001\u5F53\u524D\u6570\u636E\u5305\u6240\u9884\u4F30\u7684\u8D85\u65F6\u65F6\u95F4\uFF0CRTO\u4E0D\u662F\u56FA\u5B9A\u5199\u6B7B\u7684\u914D\u7F6E\uFF0C\u662F\u7ECF\u8FC7RTT\u8BA1\u7B97\u51FA\u6765\u7684\u3002</p><p><strong>\u6ED1\u52A8\u7A97\u53E3</strong></p><p>TCP\u7684\u6ED1\u52A8\u7A97\u53E3\u4E3B\u8981\u6709\u4E24\u4E2A\u4F5C\u7528\uFF1A</p><ol><li><p>\u4FDD\u8BC1TCP\u7684\u53EF\u9760\u6027</p></li><li><p>\u4FDD\u8BC1TCP\u7684\u6D41\u63A7\u7279\u6027</p></li></ol><p>TCP\u62A5\u6587\u5934\u6709\u4E2A\u5B57\u6BB5\u53EBWindow\uFF0C\u7528\u4E8E\u63A5\u6536\u65B9\u901A\u77E5\u53D1\u9001\u65B9\u81EA\u5DF1\u8FD8\u6709\u591A\u5C11\u7F13\u5B58\u533A\u53EF\u4EE5\u63A5\u6536\u6570\u636E\uFF0C\u53D1\u9001\u65B9\u6839\u636E\u63A5\u6536\u65B9\u7684\u5904\u7406\u80FD\u529B\u6765\u53D1\u9001\u6570\u636E\uFF0C\u4E0D\u4F1A\u5BFC\u81F4\u63A5\u6536\u65B9\u5904\u7406\u4E0D\u8FC7\u6765\uFF0C\u8FD9\u4FBF\u662F\u6D41\u91CF\u63A7\u5236\u3002</p><p>\u53D1\u9001\u65B9\u90FD\u7EF4\u6301\u4E86\u4E00\u4E2A\u8FDE\u7EED\u7684\u5141\u8BB8\u53D1\u9001\u7684\u5E27\u7684\u5E8F\u53F7\uFF0C\u79F0\u4E3A\u53D1\u9001\u7A97\u53E3\uFF1B\u540C\u65F6\uFF0C\u63A5\u6536\u65B9\u4E5F\u7EF4\u6301\u4E86\u4E00\u4E2A\u8FDE\u7EED\u7684\u5141\u8BB8\u63A5\u6536\u7684\u5E27\u7684\u5E8F\u53F7\uFF0C\u79F0\u4E3A\u63A5\u6536\u7A97\u53E3\u3002</p><p>\u53D1\u9001\u7A97\u53E3\u548C\u63A5\u6536\u7A97\u53E3\u7684\u5E8F\u53F7\u7684\u4E0A\u4E0B\u754C\u4E0D\u4E00\u5B9A\u8981\u4E00\u6837\uFF0C\u751A\u81F3\u5927\u5C0F\u4E5F\u53EF\u4EE5\u4E0D\u540C\u3002</p><p>\u4E0D\u540C\u7684\u6ED1\u52A8\u7A97\u53E3\u534F\u8BAE\u7A97\u53E3\u5927\u5C0F\u4E00\u822C\u4E0D\u540C\u3002</p><p>\u53D1\u9001\u65B9\u7A97\u53E3\u5185\u7684\u5E8F\u5217\u53F7\u4EE3\u8868\u4E86\u90A3\u4E9B\u5DF2\u7ECF\u88AB\u53D1\u9001\uFF0C\u4F46\u662F\u8FD8\u6CA1\u6709\u88AB\u786E\u8BA4\u7684\u5E27\uFF0C\u6216\u8005\u662F\u90A3\u4E9B\u53EF\u4EE5\u88AB\u53D1\u9001\u7684\u5E27</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-d734c97b-d7d6-4af6-8674-524a81fb4dbe.png" alt=""></p><p>\u6ED1\u52A8\u7A97\u53E3\u7531\u56DB\u90E8\u5206\u7EC4\u6210\u6BCF\u4E2A\u5B57\u8282\u7684\u6570\u636E\u90FD\u6709\u552F\u4E00\u987A\u5E8F\u7684\u7F16\u7801\uFF0C\u968F\u7740\u65F6\u95F4\u53D1\u5C55\uFF0C\u672A\u786E\u8BA4\u90E8\u5206\u4E0E\u53EF\u4EE5\u53D1\u9001\u6570\u636E\u5305\u7F16\u7801\u90E8\u5206\u5411\u53F3\u79FB\u52A8\uFF0C\u5F62\u5F0F\u6ED1\u52A8\u7A97\u53E3</p><ol><li><code>\u7EFF\u8272</code>\uFF1A\u53D1\u9001\u6210\u529F\u5E76\u5DF2\u7ECFACK\u786E\u8BA4\u7684\u6570\u636E</li><li><code>\u9EC4\u8272</code>\uFF1A\u53D1\u9001\u6210\u529F\u7B49\u5F85ACK\u786E\u8BA4\u7684\u6570\u636E(\u5360\u7528\u6ED1\u52A8\u7A97\u53E3\u5927\u5C0F)</li><li><code>\u7D2B\u8272</code>\uFF1A\u6ED1\u52A8\u7A97\u53E3\u5269\u4F59\u5927\u5C0F\u53EF\u4EE5\u53D1\u9001\u7684\u5B57\u8282\u6570\u91CF(\u6ED1\u52A8\u7A97\u53E3\u53EF\u7528\u5927\u5C0F)</li><li><code>\u7070\u8272</code>\uFF1A\u540E\u7EED\u6570\u636E\u7F16\u7801</li></ol><p>\u63A5\u6536\u7A97\u53E3\u7684\u5927\u5C0F\u5C31\u662F\u6ED1\u52A8\u7A97\u53E3\u7684\u6700\u5927\u503C\uFF0C\u6570\u636E\u4F20\u8F93\u8FC7\u7A0B\u4E2D\u6ED1\u52A8\u7A97\u53E3\u7684\u53EF\u7528\u5927\u5C0F\u662F\u52A8\u6001\u53D8\u5316\u7684\u3002</p><p>\u4F46\u662F\u8FD8\u6709\u8FD9\u4E48\u4E00\u70B9\uFF0C\u6ED1\u52A8\u7A97\u53E3\u7684\u8BBE\u8BA1\u4EC5\u4EC5\u662F\u8003\u8651\u5230\u4E86\u5904\u7406\u65B9\u7684\u5904\u7406\u80FD\u529B\uFF0C\u4F46\u662F\u6CA1\u6709\u8003\u8651\u5230\u9053\u8DEF\u7684\u901A\u7545\u95EE\u9898</p><p>\u5C31\u597D\u50CF\u670D\u52A1\u7AEF\u53EF\u4EE5\u5904\u7406100M\u6570\u636E\uFF0C\u4F46\u662F\u4F20\u8F93\u7684\u6570\u636E99M\u90FD\u5835\u5728\u8DEF\u4E0A\u4E86\uFF0C\u8FD9\u4E0D\u5C31\u662F\u5BFC\u81F4\u9053\u8DEF\u963B\u585E\u4E86\u4E48\uFF1F\u8FD9\u5C31\u9700\u8981\u53E6\u5916\u4E00\u4E2A\u8BBE\u8BA1<strong>\u62E5\u585E\u907F\u514D</strong></p><p><strong>\u6D41\u91CF\u63A7\u5236\u7684\u76EE\u7684</strong></p><p>\u5982\u679C\u53D1\u9001\u8005\u53D1\u9001\u6570\u636E\u8FC7\u5FEB\uFF0C\u63A5\u6536\u8005\u6765\u4E0D\u53CA\u63A5\u6536\uFF0C\u90A3\u4E48\u5C31\u4F1A\u6709\u5206\u7EC4\u4E22\u5931\u3002</p><p>\u4E3A\u4E86\u907F\u514D\u5206\u7EC4\u4E22\u5931\uFF0C\u63A7\u5236\u53D1\u9001\u8005\u7684\u53D1\u9001\u901F\u5EA6\uFF0C\u4F7F\u5F97\u63A5\u6536\u8005\u6765\u5F97\u53CA\u63A5\u6536\uFF0C\u8FD9\u5C31\u662F\u6D41\u91CF\u63A7\u5236\u3002</p><p>\u6D41\u91CF\u63A7\u5236\u6839\u672C\u76EE\u7684\u662F\u9632\u6B62\u5206\u7EC4\u4E22\u5931\uFF0C\u5B83\u662F\u6784\u6210TCP\u53EF\u9760\u6027\u7684\u4E00\u65B9\u9762\u3002</p><p><strong>\u5982\u4F55\u5B9E\u73B0\u6D41\u91CF\u63A7\u5236</strong></p><p>\u7531\u6ED1\u52A8\u7A97\u53E3\u534F\u8BAE\uFF08\u8FDE\u7EEDARQ\u534F\u8BAE\uFF09\u5B9E\u73B0\u3002\u6ED1\u52A8\u7A97\u53E3\u534F\u8BAE\u65E2\u4FDD\u8BC1\u4E86\u5206\u7EC4\u65E0\u5DEE\u9519\u3001\u6709\u5E8F\u63A5\u6536\uFF0C\u4E5F\u5B9E\u73B0\u4E86\u6D41\u91CF\u63A7\u5236\u3002</p><p>\u4E3B\u8981\u7684\u65B9\u5F0F\u5C31\u662F\u63A5\u6536\u65B9\u8FD4\u56DE\u7684 ACK \u4E2D\u4F1A\u5305\u542B\u81EA\u5DF1\u7684\u63A5\u6536\u7A97\u53E3\u7684\u5927\u5C0F\uFF0C\u5E76\u4E14\u5229\u7528\u5927\u5C0F\u6765\u63A7\u5236\u53D1\u9001\u65B9\u7684\u6570\u636E\u53D1\u9001\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-4bdc0051-8878-4ffc-b9db-71b73ec49cd0.png" alt=""></p><p><strong>\u6D41\u91CF\u63A7\u5236\u5F15\u53D1\u7684\u6B7B\u9501</strong></p><p>\u5F53\u53D1\u9001\u8005\u6536\u5230\u4E86\u4E00\u4E2A\u7A97\u53E3\u4E3A0\u7684\u5E94\u7B54\uFF0C\u53D1\u9001\u8005\u4FBF\u505C\u6B62\u53D1\u9001\uFF0C\u7B49\u5F85\u63A5\u6536\u8005\u7684\u4E0B\u4E00\u4E2A\u5E94\u7B54\u3002</p><p>\u4F46\u662F\u5982\u679C\u8FD9\u4E2A\u7A97\u53E3\u4E0D\u4E3A0\u7684\u5E94\u7B54\u5728\u4F20\u8F93\u8FC7\u7A0B\u4E22\u5931\uFF0C\u53D1\u9001\u8005\u4E00\u76F4\u7B49\u5F85\u4E0B\u53BB\uFF0C\u800C\u63A5\u6536\u8005\u4EE5\u4E3A\u53D1\u9001\u8005\u5DF2\u7ECF\u6536\u5230\u8BE5\u5E94\u7B54\uFF0C\u7B49\u5F85\u63A5\u6536\u65B0\u6570\u636E\uFF0C\u8FD9\u6837\u53CC\u65B9\u5C31\u76F8\u4E92\u7B49\u5F85\uFF0C\u4ECE\u800C\u4EA7\u751F\u6B7B\u9501\u3002</p><p>\u4E3A\u4E86\u907F\u514D\u6D41\u91CF\u63A7\u5236\u5F15\u53D1\u7684\u6B7B\u9501\uFF0CTCP\u4F7F\u7528\u4E86<strong>\u6301\u7EED\u8BA1\u65F6\u5668</strong>\u3002\u6BCF\u5F53\u53D1\u9001\u8005\u6536\u5230\u4E00\u4E2A\u96F6\u7A97\u53E3\u7684\u5E94\u7B54\u540E\u5C31\u542F\u52A8\u8BE5\u8BA1\u65F6\u5668\u3002\u65F6\u95F4\u4E00\u5230\u4FBF\u4E3B\u52A8\u53D1\u9001\u62A5\u6587\u8BE2\u95EE\u63A5\u6536\u8005\u7684\u7A97\u53E3\u5927\u5C0F\u3002\u82E5\u63A5\u6536\u8005\u4ECD\u7136\u8FD4\u56DE\u96F6\u7A97\u53E3\uFF0C\u5219\u91CD\u7F6E\u8BE5\u8BA1\u65F6\u5668\u7EE7\u7EED\u7B49\u5F85\uFF1B\u82E5\u7A97\u53E3\u4E0D\u4E3A0\uFF0C\u5219\u8868\u793A\u5E94\u7B54\u62A5\u6587\u4E22\u5931\u4E86\uFF0C\u6B64\u65F6\u91CD\u7F6E\u53D1\u9001\u7A97\u53E3\u540E\u5F00\u59CB\u53D1\u9001\uFF0C\u8FD9\u6837\u5C31\u907F\u514D\u4E86\u6B7B\u9501\u7684\u4EA7\u751F\u3002</p><h3 id="\u62E5\u585E\u63A7\u5236" tabindex="-1"><a class="header-anchor" href="#\u62E5\u585E\u63A7\u5236" aria-hidden="true">#</a> \u62E5\u585E\u63A7\u5236</h3><p><strong>\u4E3A\u4EC0\u4E48\u8981\u8FDB\u884C\u62E5\u585E\u63A7\u5236</strong></p><p>\u5047\u8BBE\u7F51\u7EDC\u5DF2\u7ECF\u51FA\u73B0\u62E5\u585E\uFF0C\u5982\u679C\u4E0D\u5904\u7406\u62E5\u585E\uFF0C\u90A3\u4E48\u5EF6\u65F6\u589E\u52A0\uFF0C\u51FA\u73B0\u66F4\u591A\u4E22\u5305\uFF0C\u89E6\u53D1\u53D1\u9001\u65B9\u91CD\u4F20\u6570\u636E\uFF0C\u52A0\u5267\u62E5\u585E\u60C5\u51B5\uFF0C\u7EE7\u7EED\u6076\u6027\u5FAA\u73AF\u76F4\u81F3\u7F51\u7EDC\u762B\u75EA\u3002</p><p>\u62E5\u585E\u63A7\u5236\u4E0E\u6D41\u91CF\u63A7\u5236\u7684\u9002\u5E94\u573A\u666F\u548C\u76EE\u7684\u5747\u4E0D\u540C\u3002</p><p>\u62E5\u585E\u53D1\u751F\u524D\uFF0C\u53EF\u907F\u514D\u6D41\u91CF\u8FC7\u5FEB\u589E\u957F\u62D6\u57AE\u7F51\u7EDC\uFF1B\u62E5\u585E\u53D1\u751F\u65F6\uFF0C\u552F\u4E00\u7684\u9009\u62E9\u5C31\u662F\u964D\u4F4E\u6D41\u91CF\u3002</p><p>\u4E3B\u8981\u4F7F\u75284\u79CD\u7B97\u6CD5\u5B8C\u6210\u62E5\u585E\u63A7\u5236\uFF1A</p><ol><li>\u6162\u542F\u52A8</li><li>\u62E5\u585E\u907F\u514D</li><li>\u5FEB\u91CD\u4F20\u7B97\u6CD5</li><li>\u5FEB\u901F\u6062\u590D\u7B97\u6CD5</li></ol><p>\u7B97\u6CD51\u30012\u9002\u7528\u4E8E\u62E5\u585E\u53D1\u751F\u524D\uFF0C\u7B97\u6CD53\u9002\u7528\u4E8E\u62E5\u585E\u53D1\u751F\u65F6\uFF0C\u7B97\u6CD54\u9002\u7528\u4E8E\u62E5\u585E\u89E3\u51B3\u540E\uFF08\u76F8\u5F53\u4E8E\u62E5\u585E\u53D1\u751F\u524D\uFF09\u3002</p><p><strong>rwnd\u4E0Ecwnd</strong></p><p><code>rwnd</code>\uFF08Receiver Window\uFF0C\u63A5\u6536\u8005\u7A97\u53E3\uFF09\u4E0E<code>cwnd</code>\uFF08Congestion Window\uFF0C\u62E5\u585E\u7A97\u53E3\uFF09\uFF1A</p><ul><li><p>rwnd\u662F\u7528\u4E8E\u6D41\u91CF\u63A7\u5236\u7684\u7A97\u53E3\u5927\u5C0F\uFF0C\u4E3B\u8981\u53D6\u51B3\u4E8E\u63A5\u6536\u65B9\u7684\u5904\u7406\u901F\u5EA6\uFF0C\u7531\u63A5\u6536\u65B9\u901A\u77E5\u53D1\u9001\u65B9\u88AB\u52A8\u8C03\u6574\u3002</p></li><li><p>cwnd\u662F\u7528\u4E8E\u62E5\u585E\u5904\u7406\u7684\u7A97\u53E3\u5927\u5C0F\uFF0C\u53D6\u51B3\u4E8E\u7F51\u7EDC\u72B6\u51B5\uFF0C\u7531\u53D1\u9001\u65B9\u63A2\u67E5\u7F51\u7EDC\u4E3B\u52A8\u8C03\u6574\u3002</p></li></ul><p>\u540C\u65F6\u8003\u8651\u6D41\u91CF\u63A7\u5236\u4E0E\u62E5\u585E\u5904\u7406\uFF0C\u5219\u53D1\u9001\u65B9\u7A97\u53E3\u7684\u5927\u5C0F\u4E0D\u8D85\u8FC7<code>min{rwnd, cwnd}</code>\u3002</p><p><strong>\u6162\u542F\u52A8\u7B97\u6CD5</strong></p><p>\u6162\u5F00\u59CB\u7B97\u6CD5\u7684\u601D\u8DEF\u5C31\u662F\uFF0C\u4E0D\u8981\u4E00\u5F00\u59CB\u5C31\u53D1\u9001\u5927\u91CF\u7684\u6570\u636E\uFF0C\u5148\u63A2\u6D4B\u4E00\u4E0B\u7F51\u7EDC\u7684\u62E5\u585E\u7A0B\u5EA6\uFF0C\u4E5F\u5C31\u662F\u8BF4\u7531\u5C0F\u5230\u5927\u9010\u6E10\u589E\u52A0\u62E5\u585E\u7A97\u53E3\u7684\u5927\u5C0F\u3002</p><p>\u8FD9\u91CC\u7528\u62A5\u6587\u6BB5\u7684\u4E2A\u6570\u4F5C\u4E3A\u62E5\u585E\u7A97\u53E3\u7684\u5927\u5C0F\u4E3E\u4F8B\u8BF4\u660E\u6162\u5F00\u59CB\u7B97\u6CD5\uFF0C\u5B9E\u9645\u7684\u62E5\u585E\u7A97\u53E3\u5927\u5C0F\u662F\u4EE5\u5B57\u8282\u4E3A\u5355\u4F4D\u7684\u3002</p><p>\u4E00\u4E2A\u4F20\u8F93\u8F6E\u6B21\u6240\u7ECF\u5386\u7684\u65F6\u95F4\u5176\u5B9E\u5C31\u662F\u5F80\u8FD4\u65F6\u95F4RTT\uFF0C\u800C\u4E14\u6BCF\u7ECF\u8FC7\u4E00\u4E2A\u4F20\u8F93\u8F6E\u6B21\uFF0C\u62E5\u585E\u7A97\u53E3cwnd\u5C31\u52A0\u500D\u3002</p><p>\u4E3A\u4E86\u9632\u6B62cwnd\u589E\u957F\u8FC7\u5927\u5F15\u8D77\u7F51\u7EDC\u62E5\u585E\uFF0C\u8FD8\u9700\u8BBE\u7F6E\u4E00\u4E2A\u6162\u5F00\u59CB\u95E8\u9650ssthresh\u72B6\u6001\u53D8\u91CF\u3002</p><blockquote><p>ssthresh\u7684\u7528\u6CD5\u5982\u4E0B\uFF1A</p></blockquote><ul><li><p>cwnd&lt;ssthresh\u65F6\uFF0C\u4F7F\u7528\u6162\u5F00\u59CB\u7B97\u6CD5\u3002</p></li><li><p>\u5F53cwnd&gt;ssthresh\u65F6\uFF0C\u6539\u7528\u62E5\u585E\u907F\u514D\u7B97\u6CD5\u3002</p></li><li><p>\u5F53cwnd=ssthresh\u65F6\uFF0C\u6162\u5F00\u59CB\u4E0E\u62E5\u585E\u907F\u514D\u7B97\u6CD5\u4EFB\u610F</p></li></ul><p>\u6CE8\u610F\uFF0C\u8FD9\u91CC\u7684\u6162\u5E76\u4E0D\u662F\u6307cwnd\u7684\u589E\u957F\u901F\u7387\u6162\uFF0C\u800C\u662F\u6307\u5728TCP\u5F00\u59CB\u53D1\u9001\u62A5\u6587\u6BB5\u65F6\u5148\u8BBE\u7F6Ecwnd=1\uFF0C\u7136\u540E\u9010\u6E10\u589E\u5927\uFF0C\u8FD9\u5F53\u7136\u6BD4\u6309\u7167\u5927\u7684cwnd\u4E00\u4E0B\u5B50\u628A\u8BB8\u591A\u62A5\u6587\u6BB5\u7A81\u7136\u6CE8\u5165\u5230\u7F51\u7EDC\u4E2D\u8981\u6162\u5F97\u591A\u3002</p><p><strong>\u62E5\u585E\u907F\u514D\u7B97\u6CD5</strong></p><p>\u8BA9\u62E5\u585E\u7A97\u53E3cwnd\u7F13\u6162\u5730\u589E\u5927\uFF0C\u5373\u6BCF\u7ECF\u8FC7\u4E00\u4E2A\u5F80\u8FD4\u65F6\u95F4RTT\u5C31\u628A\u53D1\u9001\u65B9\u7684\u62E5\u585E\u7A97\u53E3cwnd\u52A01\uFF0C\u800C\u4E0D\u662F\u52A0\u500D\u3002</p><p>\u8FD9\u6837\u62E5\u585E\u7A97\u53E3cwnd\u6309\u7EBF\u6027\u89C4\u5F8B\u7F13\u6162\u589E\u957F\uFF0C\u6BD4\u6162\u5F00\u59CB\u7B97\u6CD5\u7684\u62E5\u585E\u7A97\u53E3\u589E\u957F\u901F\u7387\u7F13\u6162\u5F97\u591A</p><p>\u65E0\u8BBA\u662F\u5728\u6162\u5F00\u59CB\u9636\u6BB5\u8FD8\u662F\u5728\u62E5\u585E\u907F\u514D\u9636\u6BB5\uFF0C\u53EA\u8981\u53D1\u9001\u65B9\u5224\u65AD\u7F51\u7EDC\u51FA\u73B0\u62E5\u585E\uFF08\u5176\u6839\u636E\u5C31\u662F\u6CA1\u6709\u6309\u65F6\u6536\u5230\u786E\u8BA4\uFF0C\u867D\u7136\u6CA1\u6709\u6536\u5230\u786E\u8BA4\u53EF\u80FD\u662F\u5176\u4ED6\u539F\u56E0\u7684\u5206\u7EC4\u4E22\u5931\uFF0C\u4F46\u662F\u56E0\u4E3A\u65E0\u6CD5\u5224\u5B9A\uFF0C\u6240\u4EE5\u90FD\u5F53\u505A\u62E5\u585E\u6765\u5904\u7406\uFF09\uFF0C\u5C31\u628A\u6162\u5F00\u59CB\u95E8\u9650ssthresh\u8BBE\u7F6E\u4E3A\u51FA\u73B0\u62E5\u585E\u65F6\u7684\u53D1\u9001\u7A97\u53E3\u5927\u5C0F\u7684\u4E00\u534A\uFF08\u4F46\u4E0D\u80FD\u5C0F\u4E8E2\uFF09\u3002</p><p>\u7136\u540E\u628A\u62E5\u585E\u7A97\u53E3cwnd\u91CD\u65B0\u8BBE\u7F6E\u4E3A1\uFF0C\u6267\u884C\u6162\u5F00\u59CB\u7B97\u6CD5\u3002</p><p>\u8FD9\u6837\u505A\u7684\u76EE\u7684\u5C31\u662F\u8981\u8FC5\u901F\u51CF\u5C11\u4E3B\u673A\u53D1\u9001\u5230\u7F51\u7EDC\u4E2D\u7684\u5206\u7EC4\u6570\uFF0C\u4F7F\u5F97\u53D1\u751F\u62E5\u585E\u7684\u8DEF\u7531\u5668\u6709\u8DB3\u591F\u65F6\u95F4\u628A\u961F\u5217\u4E2D\u79EF\u538B\u7684\u5206\u7EC4\u5904\u7406\u5B8C\u6BD5\u3002</p><p><strong>\u6574\u4E2A\u62E5\u585E\u63A7\u5236\u7684\u6D41\u7A0B\uFF1A</strong></p><p>\u5047\u5B9Acwnd=24\u65F6\uFF0C\u7F51\u7EDC\u51FA\u73B0\u8D85\u65F6\uFF08\u62E5\u585E\uFF09\uFF0C\u5219\u66F4\u65B0\u540E\u7684ssthresh=12\uFF0Ccwnd\u91CD\u65B0\u8BBE\u7F6E\u4E3A1\uFF0C\u5E76\u6267\u884C\u6162\u5F00\u59CB\u7B97\u6CD5\u3002</p><p>\u5F53cwnd=12=ssthresh\u65F6\uFF0C\u6539\u4E3A\u6267\u884C\u62E5\u585E\u907F\u514D\u7B97\u6CD5</p><p>\u6CE8\u610F\uFF1A\u62E5\u585E\u907F\u514D\u5E76\u975E\u5B8C\u5168\u80FD\u591F\u907F\u514D\u4E86\u963B\u585E\uFF0C\u800C\u662F\u4F7F\u7F51\u7EDC\u6BD4\u8F83\u4E0D\u5BB9\u6613\u51FA\u73B0\u62E5\u585E\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-314eba07-1388-4e8b-9307-8dd8d03b0dfe.png" alt=""></p><p><strong>\u5FEB\u91CD\u4F20\u7B97\u6CD5</strong></p><p>\u5FEB\u91CD\u4F20\u8981\u6C42\u63A5\u6536\u65B9\u5728\u6536\u5230\u4E00\u4E2A\u5931\u5E8F\u7684\u62A5\u6587\u6BB5\u540E\u5C31\u7ACB\u5373\u53D1\u51FA\u91CD\u590D\u786E\u8BA4\uFF08\u4E3A\u7684\u662F\u4F7F\u53D1\u9001\u65B9\u53CA\u65E9\u77E5\u9053\u6709\u62A5\u6587\u6BB5\u6CA1\u6709\u5230\u8FBE\u5BF9\u65B9\uFF0C\u53EF\u63D0\u9AD8\u7F51\u7EDC\u541E\u5410\u91CF\u7EA620%\uFF09\u800C\u4E0D\u8981\u7B49\u5230\u81EA\u5DF1\u53D1\u9001\u6570\u636E\u65F6\u634E\u5E26\u786E\u8BA4\u3002</p><p>\u5FEB\u91CD\u4F20\u7B97\u6CD5\u89C4\u5B9A\uFF0C\u53D1\u9001\u65B9\u53EA\u8981\u4E00\u8FDE\u6536\u5230\u4E09\u4E2A\u91CD\u590D\u786E\u8BA4\u5C31\u5E94\u5F53\u7ACB\u5373\u91CD\u4F20\u5BF9\u65B9\u5C1A\u672A\u6536\u5230\u7684\u62A5\u6587\u6BB5\uFF0C\u800C\u4E0D\u5FC5\u7EE7\u7EED\u7B49\u5F85\u8BBE\u7F6E\u7684\u91CD\u4F20\u8BA1\u65F6\u5668\u65F6\u95F4\u5230\u671F</p><p><strong>\u5FEB\u6062\u590D\u7B97\u6CD5</strong></p><p>\u5FEB\u91CD\u4F20\u914D\u5408\u4F7F\u7528\u7684\u8FD8\u6709\u5FEB\u6062\u590D\u7B97\u6CD5\uFF0C\u6709\u4EE5\u4E0B\u4E24\u4E2A\u8981\u70B9\uFF1A</p><ul><li><p>\u5F53\u53D1\u9001\u65B9\u8FDE\u7EED\u6536\u5230\u4E09\u4E2A\u91CD\u590D\u786E\u8BA4\u65F6\uFF0C\u5C31\u628Assthresh\u95E8\u9650\u51CF\u534A\uFF08\u4E3A\u4E86\u9884\u9632\u7F51\u7EDC\u53D1\u751F\u62E5\u585E\uFF09\u3002</p></li><li><p>\u4F46\u662F\u63A5\u4E0B\u53BB\u5E76\u4E0D\u6267\u884C\u6162\u5F00\u59CB\u7B97\u6CD5</p></li></ul><p>\u8003\u8651\u5230\u5982\u679C\u7F51\u7EDC\u51FA\u73B0\u62E5\u585E\u7684\u8BDD\u5C31\u4E0D\u4F1A\u6536\u5230\u597D\u51E0\u4E2A\u91CD\u590D\u7684\u786E\u8BA4\uFF0C\u6240\u4EE5\u53D1\u9001\u65B9\u73B0\u5728\u8BA4\u4E3A\u7F51\u7EDC\u53EF\u80FD\u6CA1\u6709\u51FA\u73B0\u62E5\u585E\u3002</p><p>\u6240\u4EE5\u6B64\u65F6\u4E0D\u6267\u884C\u6162\u5F00\u59CB\u7B97\u6CD5\uFF0C\u800C\u662F\u5C06cwnd\u8BBE\u7F6E\u4E3Assthresh\u51CF\u534A\u540E\u7684\u503C\uFF0C\u7136\u540E\u6267\u884C\u62E5\u585E\u907F\u514D\u7B97\u6CD5\uFF0C\u4F7Fcwnd\u7F13\u6162\u589E\u5927\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-3a424e43-405f-494d-b700-093781b63035.png" alt=""></p><h3 id="socket" tabindex="-1"><a class="header-anchor" href="#socket" aria-hidden="true">#</a> Socket</h3><p>\u5373\u5957\u63A5\u5B57\uFF0C\u662F\u5E94\u7528\u5C42 \u4E0E <code>TCP/IP</code> \u534F\u8BAE\u65CF\u901A\u4FE1\u7684\u4E2D\u95F4\u8F6F\u4EF6\u62BD\u8C61\u5C42\uFF0C\u8868\u73B0\u4E3A\u4E00\u4E2A\u5C01\u88C5\u4E86 TCP / IP\u534F\u8BAE\u65CF \u7684\u7F16\u7A0B\u63A5\u53E3\uFF08API\uFF09</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-eff20ef6-9d35-4075-8c53-ab52c7a46ac7.png" alt=""></p><p><code>Socket</code>\u4E0D\u662F\u4E00\u79CD\u534F\u8BAE\uFF0C\u800C\u662F\u4E00\u4E2A\u7F16\u7A0B\u8C03\u7528\u63A5\u53E3\uFF08<code>API</code>\uFF09\uFF0C\u5C5E\u4E8E\u4F20\u8F93\u5C42\uFF08\u4E3B\u8981\u89E3\u51B3\u6570\u636E\u5982\u4F55\u5728\u7F51\u7EDC\u4E2D\u4F20\u8F93\uFF09</p><p>\u5BF9\u7528\u6237\u6765\u8BF4\uFF0C\u53EA\u9700\u8C03\u7528Socket\u53BB\u7EC4\u7EC7\u6570\u636E\uFF0C\u4EE5\u7B26\u5408\u6307\u5B9A\u7684\u534F\u8BAE\uFF0C\u5373\u53EF\u901A\u4FE1</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><h2 id="udp" tabindex="-1"><a class="header-anchor" href="#udp" aria-hidden="true">#</a> UDP</h2><p><strong>UDP\u534F\u8BAE\u7279\u70B9</strong></p><ul><li><p>UDP\u662F\u65E0\u8FDE\u63A5\u7684\u4F20\u8F93\u5C42\u534F\u8BAE\uFF1B</p></li><li><p>UDP\u4F7F\u7528\u5C3D\u6700\u5927\u52AA\u529B\u4EA4\u4ED8\uFF0C\u4E0D\u4FDD\u8BC1\u53EF\u9760\u4EA4\u4ED8\uFF1B</p></li><li><p>UDP\u662F\u9762\u5411\u62A5\u6587\u7684\uFF0C\u5BF9\u5E94\u7528\u5C42\u4EA4\u4E0B\u6765\u7684\u62A5\u6587\uFF0C\u4E0D\u5408\u5E76\uFF0C\u4E0D\u62C6\u5206\uFF0C\u4FDD\u7559\u539F\u62A5\u6587\u7684\u8FB9\u754C\uFF1B</p></li><li><p>UDP\u6CA1\u6709\u62E5\u585E\u63A7\u5236\uFF0C\u56E0\u6B64\u5373\u4F7F\u7F51\u7EDC\u51FA\u73B0\u62E5\u585E\u4E5F\u4E0D\u4F1A\u964D\u4F4E\u53D1\u9001\u901F\u7387\uFF1B</p></li><li><p>UDP\u652F\u6301\u4E00\u5BF9\u4E00\u3000\u4E00\u5BF9\u591A\u3000\u591A\u5BF9\u591A\u7684\u4EA4\u4E92\u901A\u4FE1\uFF1B</p></li><li><p>UDP\u7684\u9996\u90E8\u5F00\u9500\u5C0F\uFF0C\u53EA\u6709\uFF18\u5B57\u8282</p></li></ul><p><strong>TCP\u548CUDP\u7684\u533A\u522B</strong></p><ul><li><p>TCP\u662F\u53EF\u9760\u4F20\u8F93\uFF0CUDP\u662F\u4E0D\u53EF\u9760\u4F20\u8F93;</p></li><li><p>TCP\u9762\u5411\u8FDE\u63A5\uFF0CUDP\u65E0\u8FDE\u63A5;</p></li><li><p>TCP\u4F20\u8F93\u6570\u636E\u6709\u5E8F\uFF0CUDP\u4E0D\u4FDD\u8BC1\u6570\u636E\u7684\u6709\u5E8F\u6027;</p></li><li><p>TCP\u4E0D\u4FDD\u5B58\u6570\u636E\u8FB9\u754C\uFF0CUDP\u4FDD\u7559\u6570\u636E\u8FB9\u754C;</p></li><li><p>TCP\u4F20\u8F93\u901F\u5EA6\u76F8\u5BF9UDP\u8F83\u6162;</p></li><li><p>TCP\u6709\u6D41\u91CF\u63A7\u5236\u548C\u62E5\u585E\u63A7\u5236\uFF0CUDP\u6CA1\u6709;</p></li><li><p>TCP\u662F\u91CD\u91CF\u7EA7\u534F\u8BAE\uFF0CUDP\u662F\u8F7B\u91CF\u7EA7\u534F\u8BAE;</p></li><li><p>TCP\u9996\u90E8\u8F83\u957F20\u5B57\u8282\uFF0CUDP\u9996\u90E8\u8F83\u77ED\uFF18\u5B57\u8282;</p></li></ul><p><strong>\u57FA\u4E8ETCP\u548CUDP\u7684\u5E38\u7528\u534F\u8BAE</strong></p><p>HTTP\u3001HTTPS\u3001FTP\u3001TELNET\u3001SMTP(\u7B80\u5355\u90AE\u4EF6\u4F20\u8F93\u534F\u8BAE)\u534F\u8BAE\u57FA\u4E8E\u53EF\u9760\u7684TCP\u534F\u8BAE\u3002</p><p>TFTP\u3001DNS\u3001DHCP\u3001TFTP\u3001SNMP(\u7B80\u5355\u7F51\u7EDC\u7BA1\u7406\u534F\u8BAE)\u3001RIP\u57FA\u4E8E\u4E0D\u53EF\u9760\u7684UDP\u534F\u8BAE</p><h3 id="\u62A5\u6587\u6BB5-1" tabindex="-1"><a class="header-anchor" href="#\u62A5\u6587\u6BB5-1" aria-hidden="true">#</a> \u62A5\u6587\u6BB5</h3><p>UDP\u7684\u62A5\u6587\u6BB5\u5171\u67092\u4E2A\u5B57\u6BB5\uFF1A\u6570\u636E\u5B57\u6BB5 + \u9996\u90E8\u5B57\u6BB5</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-a5d0d209-01db-4ee7-b63b-bf2659545702.png" alt=""></p><p><strong>UDP\u62A5\u6587\u4E2D\u6BCF\u4E2A\u5B57\u6BB5\u7684\u542B\u4E49\u5982\u4E0B\uFF1A</strong></p><ul><li>\u6E90\u7AEF\u53E3\uFF1A\u8FD9\u4E2A\u5B57\u6BB5\u5360\u636E UDP \u62A5\u6587\u5934\u7684\u524D 16 \u4F4D\uFF0C\u901A\u5E38\u5305\u542B\u53D1\u9001\u6570\u636E\u62A5\u7684\u5E94\u7528\u7A0B\u5E8F\u6240\u4F7F\u7528\u7684 UDP \u7AEF\u53E3\uFF0C\u63A5\u6536\u7AEF\u7684\u5E94\u7528\u7A0B\u5E8F\u5229\u7528\u8FD9\u4E2A\u5B57\u6BB5\u7684\u503C\u4F5C\u4E3A\u53D1\u9001\u54CD\u5E94\u7684\u76EE\u7684\u5730\u5740\uFF0C\u8FD9\u4E2A\u5B57\u6BB5\u662F\u53EF\u9009\u7684\uFF0C\u6240\u4EE5\u53D1\u9001\u7AEF\u7684\u5E94\u7528\u7A0B\u5E8F\u4E0D\u4E00\u5B9A\u4F1A\u628A\u81EA\u5DF1\u7684\u7AEF\u53E3\u53F7\u5199\u5165\u8BE5\u5B57\u6BB5\u4E2D\uFF0C\u5982\u679C\u4E0D\u5199\u5165\u7AEF\u53E3\u53F7\uFF0C\u5219\u628A\u8FD9\u4E2A\u5B57\u6BB5\u8BBE\u7F6E\u4E3A 0\uFF0C\u8FD9\u6837\uFF0C\u63A5\u6536\u7AEF\u7684\u5E94\u7528\u7A0B\u5E8F\u5C31\u4E0D\u80FD\u53D1\u9001\u54CD\u5E94\u4E86\u3002</li><li>\u76EE\u7684\u7AEF\u53E3\uFF1A\u63A5\u6536\u7AEF\u8BA1\u7B97\u673A\u4E0A UDP \u8F6F\u4EF6\u4F7F\u7528\u7684\u7AEF\u53E3\uFF0C\u5360\u636E 16 \u4F4D\u3002</li><li>\u957F\u5EA6\uFF1A\u8BE5\u5B57\u6BB5\u5360\u636E 16 \u4F4D\uFF0C\u8868\u793A UDP \u6570\u636E\u62A5\u957F\u5EA6\uFF0C\u5305\u542B UDP \u62A5\u6587\u5934\u548C UDP \u6570\u636E\u957F\u5EA6\uFF0C\u56E0\u4E3A UDP \u62A5\u6587\u5934\u957F\u5EA6\u662F 8 \u4E2A\u5B57\u8282\uFF0C\u6240\u4EE5\u8FD9\u4E2A\u503C\u6700\u5C0F\u4E3A 8\u3002</li><li>\u6821\u9A8C\u503C\uFF1A\u8BE5\u5B57\u6BB5\u5360\u636E 16 \u4F4D\uFF0C\u53EF\u4EE5\u68C0\u9A8C\u6570\u636E\u5728\u4F20\u8F93\u8FC7\u7A0B\u4E2D\u662F\u5426\u88AB\u635F\u574F\u3002</li></ul><h2 id="\u7F51\u7EDC\u5C42" tabindex="-1"><a class="header-anchor" href="#\u7F51\u7EDC\u5C42" aria-hidden="true">#</a> \u7F51\u7EDC\u5C42</h2><h3 id="mac\u5730\u5740" tabindex="-1"><a class="header-anchor" href="#mac\u5730\u5740" aria-hidden="true">#</a> MAC\u5730\u5740</h3><p>MAC\u79F0\u4E3A\u7269\u7406\u5730\u5740\uFF0C\u4E5F\u53EB\u786C\u4EF6\u5730\u5740\uFF0C\u7528\u6765\u5B9A\u4E49\u7F51\u7EDC\u8BBE\u5907\u7684\u4F4D\u7F6E\uFF0CMAC\u5730\u5740\u662F\u7F51\u5361\u51FA\u5382\u65F6\u8BBE\u5B9A\u7684\uFF0C\u662F\u56FA\u5B9A\u7684\uFF08\u4F46\u53EF\u4EE5\u901A\u8FC7\u5728\u8BBE\u5907\u7BA1\u7406\u5668\u4E2D\u6216\u6CE8\u518C\u8868\u7B49\u65B9\u5F0F\u4FEE\u6539\uFF0C\u540C\u4E00\u7F51\u6BB5\u5185\u7684MAC\u5730\u5740\u5FC5\u987B\u552F\u4E00\uFF09\u3002</p><p>MAC\u5730\u5740\u91C7\u7528\u5341\u516D\u8FDB\u5236\u6570\u8868\u793A\uFF0C\u957F\u5EA6\u662F6\u4E2A\u5B57\u8282\uFF0848\u4F4D\uFF09\uFF0C\u5206\u4E3A\u524D24\u4F4D\u548C\u540E24\u4F4D\u3002</p><blockquote><p>MAC\u5730\u5740\u5BF9\u5E94\u4E8EOSI\u53C2\u8003\u6A21\u578B\u7684\u7B2C\u4E8C\u5C42\u6570\u636E\u94FE\u8DEF\u5C42\uFF0C\u5DE5\u4F5C\u5728\u6570\u636E\u94FE\u8DEF\u5C42\u7684\u4EA4\u6362\u673A\u7EF4\u62A4\u7740\u8BA1\u7B97\u673AMAC\u5730\u5740\u548C\u81EA\u8EAB\u7AEF\u53E3\u7684\u6570\u636E\u5E93\uFF0C\u4EA4\u6362\u673A\u6839\u636E\u6536\u5230\u7684\u6570\u636E\u5E27\u4E2D\u7684\u76EE\u7684MAC\u5730\u5740\u5B57\u6BB5\u6765\u8F6C\u53D1\u6570\u636E\u5E27\u3002</p></blockquote><h3 id="ip\u5730\u5740" tabindex="-1"><a class="header-anchor" href="#ip\u5730\u5740" aria-hidden="true">#</a> IP\u5730\u5740</h3><p>\u5E38\u89C1\u7684IP\u5730\u5740\u5206\u4E3AIPv4\u4E0EIPv6\u4E24\u5927\u7C7B\uFF0C\u5F53\u524D\u5E7F\u6CDB\u5E94\u7528\u7684\u662FIPv4\uFF0C\u76EE\u524DIPv4\u51E0\u4E4E\u8017\u5C3D\uFF0C\u4E0B\u4E00\u9636\u6BB5\u5FC5\u7136\u4F1A\u8FDB\u884C\u7248\u672C\u5347\u7EA7\u5230IPv6\uFF1B</p><p>IP\u5730\u5740\u662F\u4EE5\u7F51\u7EDC\u53F7\u548C\u4E3B\u673A\u53F7\u6765\u6807\u793A\u7F51\u7EDC\u4E0A\u7684\u4E3B\u673A\u7684\uFF0C\u6211\u4EEC\u628A\u7F51\u7EDC\u53F7\u76F8\u540C\u7684\u4E3B\u673A\u79F0\u4E4B\u4E3A\u672C\u5730\u7F51\u7EDC\uFF0C\u7F51\u7EDC\u53F7\u4E0D\u76F8\u540C\u7684\u4E3B\u673A\u79F0\u4E4B\u4E3A\u8FDC\u7A0B\u7F51\u7EDC\u4E3B\u673A</p><p>\u672C\u5730\u7F51\u7EDC\u4E2D\u7684\u4E3B\u673A\u53EF\u4EE5\u76F4\u63A5\u76F8\u4E92\u901A\u4FE1\uFF1B\u8FDC\u7A0B\u7F51\u7EDC\u4E2D\u7684\u4E3B\u673A\u8981\u76F8\u4E92\u901A\u4FE1\u5FC5\u987B\u901A\u8FC7\u672C\u5730\u7F51\u5173\uFF08Gateway\uFF09\u6765\u4F20\u9012\u8F6C\u53D1\u6570\u636E\u3002</p><p>IP\u5730\u5740\u5BF9\u5E94\u4E8EOSI\u53C2\u8003\u6A21\u578B\u7684\u7B2C\u4E09\u5C42\u7F51\u7EDC\u5C42\uFF0C\u5DE5\u4F5C\u5728\u7F51\u7EDC\u5C42\u7684\u8DEF\u7531\u5668\u6839\u636E\u76EE\u6807IP\u548C\u6E90IP\u6765\u5224\u65AD\u662F\u5426\u5C5E\u4E8E\u540C\u4E00\u7F51\u6BB5\uFF0C\u5982\u679C\u662F\u4E0D\u540C\u7F51\u6BB5\uFF0C\u5219\u8F6C\u53D1\u6570\u636E\u5305\u3002</p><p><strong>IP\u5730\u5740\u683C\u5F0F\u548C\u8868\u793A</strong></p><p>IP\u5730\u5740(IPv4)\u753132\u4F4D\u4E8C\u8FDB\u5236\u6570\u7EC4\u6210\uFF0C\u5206\u4E3A4\u6BB5\uFF084\u4E2A\u5B57\u8282\uFF09\uFF0C\u6BCF\u4E00\u6BB5\u4E3A8\u4F4D\u4E8C\u8FDB\u5236\u6570\uFF081\u4E2A\u5B57\u8282\uFF09</p><p>\u6BCF\u4E00\u6BB58\u4F4D\u4E8C\u8FDB\u5236\uFF0C\u4E2D\u95F4\u4F7F\u7528\u82F1\u6587\u7684\u6807\u70B9\u7B26\u53F7<code>.</code>\u9694\u5F00</p><p>\u7531\u4E8E\u4E8C\u8FDB\u5236\u6570\u592A\u957F\uFF0C\u4E3A\u4E86\u4FBF\u4E8E\u8BB0\u5FC6\u548C\u8BC6\u522B\uFF0C\u628A\u6BCF\u4E00\u6BB58\u4F4D\u4E8C\u8FDB\u5236\u6570\u8F6C\u6210\u5341\u8FDB\u5236\uFF0C\u5927\u5C0F\u4E3A0\u81F3255\u3002</p><p>IP\u5730\u5740\u7684\u8FD9\u79CD\u8868\u793A\u6CD5\u53EB\u505A<strong>\u70B9\u5206\u5341\u8FDB\u5236\u8868\u793A\u6CD5</strong>\u3002</p><p>IP\u5730\u5740\u8868\u793A\u4E3A\uFF1A<code>xxx.xxx.xxx.xxx</code></p><p>\u4E3E\u4E2A\u6817\u5B50\uFF1A<code>210.21.196.6</code>\u5C31\u662F\u4E00\u4E2AIP\u5730\u5740\u7684\u8868\u793A\u3002</p><p>\u8BA1\u7B97\u673A\u7684IP\u5730\u5740\u7531\u4E24\u90E8\u5206\u7EC4\u6210\uFF0C\u4E00\u90E8\u5206\u4E3A\u7F51\u7EDC\u6807\u8BC6\uFF0C\u4E00\u90E8\u5206\u4E3A\u4E3B\u673A\u6807\u8BC6\uFF0C\u540C\u4E00\u7F51\u6BB5\u5185\u7684\u8BA1\u7B97\u673A\u7F51\u7EDC\u90E8\u5206\u76F8\u540C\uFF0C\u4E3B\u673A\u90E8\u5206\u4E0D\u80FD\u540C\u65F6\u91CD\u590D\u51FA\u73B0\u3002</p><p><strong>\u8DEF\u7531\u5668</strong>\u8FDE\u63A5\u4E0D\u540C\u7F51\u6BB5\uFF0C\u8D1F\u8D23\u4E0D\u540C\u7F51\u6BB5\u4E4B\u95F4\u7684\u6570\u636E\u8F6C\u53D1\uFF0C<strong>\u4EA4\u6362\u673A</strong>\u8FDE\u63A5\u7684\u662F\u540C\u4E00\u7F51\u6BB5\u7684\u8BA1\u7B97\u673A\u3002</p><p>\u901A\u8FC7\u8BBE\u7F6E\u7F51\u7EDC\u5730\u5740\u548C\u4E3B\u673A\u5730\u5740\uFF0C\u5728\u4E92\u76F8\u8FDE\u63A5\u7684\u6574\u4E2A\u7F51\u7EDC\u4E2D\u4FDD\u8BC1\u6BCF\u53F0\u4E3B\u673A\u7684IP\u5730\u5740\u4E0D\u4F1A\u4E92\u76F8\u91CD\u53E0\uFF0C\u5373IP\u5730\u5740\u5177\u6709\u4E86\u552F\u4E00\u6027\u3002</p><p><strong>IP\u5730\u5740\u5206\u7C7B\u8BE6\u89E3</strong></p><p>IP\u5730\u5740\u5206A\u3001B\u3001C\u3001D\u3001E\u4E94\u7C7B\uFF0C\u5176\u4E2DA\u3001B\u3001C\u8FD9\u4E09\u7C7B\u662F\u6BD4\u8F83\u5E38\u7528\u7684IP\u5730\u5740\uFF0CD\u3001E\u7C7B\u4E3A\u7279\u6B8A\u5730\u5740\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-212f3f9b-b07f-4cc9-81eb-55bb478f1b66.png" alt=""></p><h3 id="\u5B50\u7F51\u63A9\u7801" tabindex="-1"><a class="header-anchor" href="#\u5B50\u7F51\u63A9\u7801" aria-hidden="true">#</a> \u5B50\u7F51\u63A9\u7801</h3><p><strong>\u5B50\u7F51\u63A9\u7801\u7684\u6982\u5FF5\u53CA\u4F5C\u7528</strong></p><p>\u901A\u8FC7\u5B50\u7F51\u63A9\u7801\uFF0C\u624D\u80FD\u8868\u660E\u4E00\u53F0\u4E3B\u673A\u6240\u5728\u7684\u5B50\u7F51\u4E0E\u5176\u4ED6\u5B50\u7F51\u7684\u5173\u7CFB\uFF0C\u4F7F\u7F51\u7EDC\u6B63\u5E38\u5DE5\u4F5C\u3002</p><p>\u5B50\u7F51\u63A9\u7801\u548CIP\u5730\u5740\u505A\u4E0E\u8FD0\u7B97\uFF0C\u5206\u79BB\u51FAIP\u5730\u5740\u4E2D\u7684\u7F51\u7EDC\u5730\u5740\u548C\u4E3B\u673A\u5730\u5740\uFF0C\u7528\u4E8E\u5224\u65AD\u8BE5IP\u5730\u5740\u662F\u5728\u672C\u5730\u7F51\u7EDC\u4E0A\uFF0C\u8FD8\u662F\u5728\u8FDC\u7A0B\u7F51\u7EDC\u7F51\u4E0A\u3002</p><p>\u5B50\u7F51\u63A9\u7801\u8FD8\u7528\u4E8E\u5C06\u7F51\u7EDC\u8FDB\u4E00\u6B65\u5212\u5206\u4E3A\u82E5\u5E72\u5B50\u7F51\uFF0C\u4EE5\u907F\u514D\u4E3B\u673A\u8FC7\u591A\u800C\u62E5\u5835\u6216\u8FC7\u5C11\u800CIP\u6D6A\u8D39\u3002</p><p><strong>\u5B50\u7F51\u63A9\u7801\u7684\u7EC4\u6210</strong></p><p>\u540CIP\u5730\u5740\u4E00\u6837\uFF0C\u5B50\u7F51\u63A9\u7801\u662F\u7531\u957F\u5EA6\u4E3A32\u4F4D\u4E8C\u8FDB\u5236\u6570\u7EC4\u6210\u7684\u4E00\u4E2A\u5730\u5740\u3002</p><p>\u5B50\u7F51\u63A9\u780132\u4F4D\u4E0EIP\u5730\u574032\u4F4D\u76F8\u5BF9\u5E94\uFF0CIP\u5730\u5740\u5982\u679C\u67D0\u4F4D\u662F\u7F51\u7EDC\u5730\u5740\uFF0C\u5219\u5B50\u7F51\u63A9\u7801\u4E3A1\uFF0C\u5426\u5219\u4E3A0\u3002</p><p>\u4E3E\u4E2A\u6817\u5B50\uFF1A\u5982\uFF1A<code>11111111.11111111.11111111.00000000</code></p><blockquote><p>\u5DE6\u8FB9\u8FDE\u7EED\u76841\u7684\u4E2A\u6570\u4EE3\u8868\u7F51\u7EDC\u53F7\u7684\u957F\u5EA6\uFF0C\uFF08\u4F7F\u7528\u65F6\u5FC5\u987B\u662F\u8FDE\u7EED\u7684\uFF0C\u7406\u8BBA\u4E0A\u4E5F\u53EF\u4EE5\u4E0D\u8FDE\u7EED\uFF09\uFF0C\u53F3\u8FB9\u8FDE\u7EED\u76840\u7684\u4E2A\u6570\u4EE3\u8868\u4E3B\u673A\u53F7\u7684\u957F\u5EA6\u3002</p></blockquote><p><strong>\u4E3A\u4EC0\u4E48\u8981\u4F7F\u7528\u5B50\u7F51\u63A9\u7801</strong></p><p>\u4E24\u53F0\u4E3B\u673A\u8981\u901A\u4FE1\uFF0C\u9996\u5148\u8981\u5224\u65AD\u662F\u5426\u5904\u4E8E\u540C\u4E00\u7F51\u6BB5\uFF0C\u5373\u7F51\u7EDC\u5730\u5740\u662F\u5426\u76F8\u540C\u3002</p><p>\u5982\u679C\u76F8\u540C\uFF0C\u90A3\u4E48\u53EF\u4EE5\u628A\u6570\u636E\u5305\u76F4\u63A5\u53D1\u9001\u5230\u76EE\u6807\u4E3B\u673A\uFF0C\u5426\u5219\u5C31\u9700\u8981\u8DEF\u7531\u7F51\u5173\u5C06\u6570\u636E\u5305\u8F6C\u53D1\u9001\u5230\u76EE\u7684\u5730\u3002</p><blockquote><p>\u53EF\u4EE5\u8FD9\u4E48\u7B80\u5355\u7684\u7406\u89E3\uFF1AA\u4E3B\u673A\u8981\u4E0EB\u4E3B\u673A\u901A\u4FE1\uFF0CA\u548CB\u5404\u81EA\u7684IP\u5730\u5740\u4E0EA\u4E3B\u673A\u7684\u5B50\u7F51\u63A9\u7801\u8FDB\u884CAnd\u4E0E\u8FD0\u7B97\uFF0C\u770B\u5F97\u51FA\u7684\u7ED3\u679C\uFF1A</p><p>1\u3001\u7ED3\u679C\u5982\u679C\u76F8\u540C\uFF0C\u5219\u8BF4\u660E\u8FD9\u4E24\u53F0\u4E3B\u673A\u662F\u5904\u4E8E\u540C\u4E00\u4E2A\u7F51\u6BB5\uFF0C\u8FD9\u6837A\u53EF\u4EE5\u901A\u8FC7ARP\u5E7F\u64AD\u53D1\u73B0B\u7684MAC\u5730\u5740\uFF0CB\u4E5F\u53EF\u4EE5\u53D1\u73B0A\u7684MAC\u5730\u5740\u6765\u5B9E\u73B0\u6B63\u5E38\u901A\u4FE1\u3002</p><p>2\u3001\u5982\u679C\u7ED3\u679C\u4E0D\u540C\uFF0CARP\u5E7F\u64AD\u4F1A\u5728\u672C\u5730\u7F51\u5173\u7EC8\u7ED3\uFF0C\u8FD9\u65F6\u5019A\u4F1A\u628A\u53D1\u7ED9B\u7684\u6570\u636E\u5305\u5148\u53D1\u7ED9\u672C\u5730\u7F51\u5173\uFF0C\u7F51\u5173\u518D\u6839\u636EB\u4E3B\u673A\u7684IP\u5730\u5740\u6765\u67E5\u8BE2\u8DEF\u7531\u8868\uFF0C\u518D\u5C06\u6570\u636E\u5305\u7EE7\u7EED\u4F20\u9012\u8F6C\u53D1\uFF0C\u6700\u7EC8\u9001\u8FBE\u5230\u76EE\u7684\u5730B\u3002</p></blockquote><hr><blockquote><p>\u8BA1\u7B97\u673A\u7684\u7F51\u5173\uFF08Gateway\uFF09\u5C31\u662F\u5230\u5176\u4ED6\u7F51\u6BB5\u7684\u51FA\u53E3\uFF0C\u4E5F\u5C31\u662F\u8DEF\u7531\u5668\u63A5\u53E3IP\u5730\u5740\u3002</p><p>\u8DEF\u7531\u5668\u63A5\u53E3\u4F7F\u7528\u7684IP\u5730\u5740\u53EF\u4EE5\u662F\u672C\u7F51\u6BB5\u4E2D\u4EFB\u4F55\u4E00\u4E2A\u5730\u5740\uFF0C\u4E0D\u8FC7\u901A\u5E38\u4F7F\u7528\u8BE5\u7F51\u6BB5\u7684\u7B2C\u4E00\u4E2A\u53EF\u7528\u7684\u5730\u5740\u6216\u6700\u540E\u4E00\u4E2A\u53EF\u7528\u7684\u5730\u5740\uFF0C\u8FD9\u662F\u4E3A\u4E86\u5C3D\u53EF\u80FD\u907F\u514D\u548C\u672C\u7F51\u6BB5\u4E2D\u7684\u4E3B\u673A\u5730\u5740\u51B2\u7A81\u3002</p></blockquote><p>\u5728\u5982\u4E0B\u62D3\u6251\u56FE\u793A\u4F8B\u4E2D\uFF0CA\u4E0EB\uFF0CC\u4E0ED\uFF0C\u90FD\u53EF\u4EE5\u76F4\u63A5\u76F8\u4E92\u901A\u4FE1\uFF08\u90FD\u662F\u5C5E\u4E8E\u5404\u81EA\u540C\u4E00\u7F51\u6BB5\uFF0C\u4E0D\u7528\u7ECF\u8FC7\u8DEF\u7531\u5668\uFF09</p><p>\u4F46\u662FA\u4E0EC\uFF0CA\u4E0ED\uFF0CB\u4E0EC\uFF0CB\u4E0ED\u5B83\u4EEC\u4E4B\u95F4\u4E0D\u5C5E\u4E8E\u540C\u4E00\u7F51\u6BB5\uFF0C\u6240\u4EE5\u5B83\u4EEC\u901A\u4FE1\u662F\u8981\u7ECF\u8FC7\u672C\u5730\u7F51\u5173\uFF0C\u7136\u540E\u8DEF\u7531\u5668\u6839\u636E\u5BF9\u65B9IP\u5730\u5740\uFF0C\u5728\u8DEF\u7531\u8868\u4E2D\u67E5\u627E\u6070\u597D\u6709\u5339\u914D\u5230\u5BF9\u65B9IP\u5730\u5740\u7684\u76F4\u8FDE\u8DEF\u7531\uFF0C\u4E8E\u662F\u4ECE\u53E6\u4E00\u8FB9\u7F51\u5173\u63A5\u53E3\u8F6C\u53D1\u51FA\u53BB\u5B9E\u73B0\u4E92\u8FDE</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-e1d68baa-9d8c-4595-bcb5-0dc5f6e240fe.png" alt=""></p><p><strong>\u5B50\u7F51\u63A9\u7801\u548CIP\u5730\u5740\u7684\u5173\u7CFB</strong></p><p>\u5B50\u7F51\u63A9\u7801\u662F\u7528\u6765\u5224\u65AD\u4EFB\u610F\u4E24\u53F0\u4E3B\u673A\u7684IP\u5730\u5740\u662F\u5426\u5C5E\u4E8E\u540C\u4E00\u7F51\u7EDC\u7684\u4F9D\u636E</p><p>\u62FF\u53CC\u65B9\u4E3B\u673A\u7684IP\u5730\u5740\u548C\u81EA\u5DF1\u4E3B\u673A\u7684\u5B50\u7F51\u63A9\u7801\u505A\u4E0E\u8FD0\u7B97\uFF0C\u5982\u7ED3\u679C\u4E3A\u540C\u4E00\u7F51\u7EDC\uFF0C\u5C31\u53EF\u4EE5\u76F4\u63A5\u901A\u4FE1</p><p><strong>\u5982\u4F55\u6839\u636EIP\u5730\u5740\u548C\u5B50\u7F51\u63A9\u7801\uFF0C\u8BA1\u7B97\u7F51\u7EDC\u5730\u5740\uFF1A</strong></p><p>\u5C06IP\u5730\u5740\u4E0E\u5B50\u7F51\u63A9\u7801\u8F6C\u6362\u6210\u4E8C\u8FDB\u5236\u6570\u3002</p><p>\u5C06\u4E8C\u8FDB\u5236\u5F62\u5F0F\u7684 IP \u5730\u5740\u4E0E\u5B50\u7F51\u63A9\u7801\u505A\u4E0E\u8FD0\u7B97\u3002</p><p>\u5C06\u5F97\u51FA\u7684\u7ED3\u679C\u8F6C\u5316\u4E3A\u5341\u8FDB\u5236\uFF0C\u4FBF\u5F97\u5230\u7F51\u7EDC\u5730\u5740\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-5fab32f0-20d1-4c05-bfb9-47928ceac65d.png" alt=""></p><h3 id="\u7F51\u5173" tabindex="-1"><a class="header-anchor" href="#\u7F51\u5173" aria-hidden="true">#</a> \u7F51\u5173</h3><p>\u7F51\u5173\u5B9E\u8D28\u4E0A\u662F\u4E00\u4E2A\u7F51\u7EDC\u901A\u5411\u5176\u4ED6\u7F51\u7EDC\u7684IP\u5730\u5740\u3002</p><p>\u6BD4\u5982\u6709\u7F51\u7EDCA\u548C\u7F51\u7EDCB\uFF0C\u7F51\u7EDCA\u7684IP\u5730\u5740\u8303\u56F4\u4E3A<code>192.168.1.1~192. 168.1.254</code>\uFF0C\u5B50\u7F51\u63A9\u7801\u4E3A<code>255.255.255.0</code>\uFF1B</p><p>\u7F51\u7EDCB\u7684IP\u5730\u5740\u8303\u56F4\u4E3A<code>192.168.2.1~192.168.2.254</code>\uFF0C\u5B50\u7F51\u63A9\u7801\u4E3A<code>255.255.255.0</code>\u3002</p><p>\u5728\u6CA1\u6709\u8DEF\u7531\u5668\u7684\u60C5\u51B5\u4E0B\uFF0C\u4E24\u4E2A\u7F51\u7EDC\u4E4B\u95F4\u662F\u4E0D\u80FD\u8FDB\u884CTCP/IP\u901A\u4FE1\u7684\uFF0C\u5373\u4F7F\u662F\u4E24\u4E2A\u7F51\u7EDC\u8FDE\u63A5\u5728\u540C\u4E00\u53F0\u4EA4\u6362\u673A(\u6216\u96C6\u7EBF\u5668)\u4E0A\uFF0CTCP/IP\u534F\u8BAE\u4E5F\u4F1A\u6839\u636E\u5B50\u7F51\u63A9\u7801(<code>255.255.255.0</code>)\u5224\u5B9A\u4E24\u4E2A\u7F51\u7EDC\u4E2D\u7684\u4E3B\u673A\u5904\u5728\u4E0D\u540C\u7684\u7F51\u7EDC\u91CC\u3002</p><p>\u800C\u8981\u5B9E\u73B0\u8FD9\u4E24\u4E2A\u7F51\u7EDC\u4E4B\u95F4\u7684\u901A\u4FE1\uFF0C\u5219\u5FC5\u987B\u901A\u8FC7\u7F51\u5173\u3002</p><p>\u5982\u679C\u7F51\u7EDCA\u4E2D\u7684\u4E3B\u673A\u53D1\u73B0\u6570\u636E\u5305\u7684\u76EE\u7684\u4E3B\u673A\u4E0D\u5728\u672C\u5730\u7F51\u7EDC\u4E2D\uFF0C\u5C31\u628A\u6570\u636E\u5305\u8F6C\u53D1\u7ED9\u5B83\u81EA\u5DF1\u7684\u7F51\u5173\uFF0C\u518D\u7531\u7F51\u5173\u8F6C\u53D1\u7ED9\u7F51\u7EDCB\u7684\u7F51\u5173\uFF0C\u7F51\u7EDCB\u7684\u7F51\u5173\u518D\u8F6C\u53D1\u7ED9\u7F51\u7EDCB\u7684\u67D0\u4E2A\u4E3B\u673A\u3002\u7F51\u7EDCB\u5411\u7F51\u7EDCA\u8F6C\u53D1\u6570\u636E\u5305\u7684\u8FC7\u7A0B\u3002</p><p><strong>\u6240\u4EE5\u8BF4\uFF0C\u53EA\u6709\u8BBE\u7F6E\u597D\u7F51\u5173\u7684IP\u5730\u5740\uFF0CTCP/IP\u534F\u8BAE\u624D\u80FD\u5B9E\u73B0\u4E0D\u540C\u7F51\u7EDC\u4E4B\u95F4\u7684\u76F8\u4E92\u901A\u4FE1\u3002</strong></p><blockquote><p>\u90A3\u4E48\u8FD9\u4E2AIP\u5730\u5740\u662F\u54EA\u53F0\u673A\u5668\u7684IP\u5730\u5740\u5462\uFF1F</p></blockquote><p>\u7F51\u5173\u7684IP\u5730\u5740\u662F\u5177\u6709\u8DEF\u7531\u529F\u80FD\u7684\u8BBE\u5907\u7684IP\u5730\u5740\uFF0C\u5177\u6709\u8DEF\u7531\u529F\u80FD\u7684\u8BBE\u5907\u6709\u8DEF\u7531\u5668\u3001\u542F\u7528\u4E86\u8DEF\u7531\u534F\u8BAE\u7684\u670D\u52A1\u5668(\u5B9E\u8D28\u4E0A\u76F8\u5F53\u4E8E\u4E00\u53F0\u8DEF\u7531\u5668)\u3001\u4EE3\u7406\u670D\u52A1\u5668(\u4E5F\u76F8\u5F53\u4E8E\u4E00\u53F0\u8DEF\u7531\u5668)\u3002</p><h3 id="ping" tabindex="-1"><a class="header-anchor" href="#ping" aria-hidden="true">#</a> Ping</h3><p>Ping\u662F\u6211\u4EEC\u6D4B\u8BD5\u7F51\u7EDC\u8FDE\u63A5\u7684\u5E38\u7528\u6307\u4EE4\u3002</p><p>\u5B83\u5229\u7528ICMP\u62A5\u6587\u68C0\u6D4B\u7F51\u7EDC\u8FDE\u63A5\u3002</p><p><strong>\u5047\u8BBEA ping B</strong></p><ol><li><p>ping\u901A\u77E5\u7CFB\u7EDF\u5EFA\u7ACB\u4E00\u4E2A\u56FA\u5B9A\u683C\u5F0F\u7684ICMP\u8BF7\u6C42\u6570\u636E\u5305\u3002</p></li><li><p>ICMP\u534F\u8BAE\u6253\u5305\u8FD9\u4E2A\u6570\u636E\u5305\u548CB\u7684IP\u5730\u5740\u8F6C\u4EA4\u7ED9IP\u534F\u8BAE\u5C42</p></li><li><p>IP\u5C42\u534F\u8BAE\u5C06\u673A\u5668B\u7684IP\u5730\u5740\u4E3A\u76EE\u7684\u5730\u5740\uFF0C\u672C\u673A\u7684IP\u5730\u5740\u4E3A\u6E90\u5730\u5740\uFF0C\u52A0\u4E0A\u4E00\u4E9B\u5934\u90E8\u5FC5\u8981\u7684\u63A7\u5236\u4FE1\u606F\uFF0C\u6784\u5EFA\u4E00\u4E2AIP\u6570\u636E\u5305</p></li><li><p>\u83B7\u53D6B\u7684MAC\u5730\u5740\uFF0C\u505A\u8FD9\u4E2A\u64CD\u4F5C\u9996\u5148\u673A\u5668A\u4F1A\u5224\u65ADB\u662F\u5426\u5728\u540C\u4E00\u7F51\u6BB5\u5185\uFF0C\u82E5IP\u5C42\u534F\u8BAE\u901A\u8FC7B\u7684IP\u5730\u5740\u548C\u81EA\u5DF1\u7684\u5B50\u7F51\u63A9\u7801\uFF0C\u53D1\u73B0\u5B83\u8DDF\u81EA\u5DF1\u5C5E\u4E8E\u540C\u4E00\u7F51\u7EDC\uFF0C\u5C31\u76F4\u63A5\u5728\u672C\u7F51\u7EDC\u67E5\u627E\u8FD9\u53F0\u673A\u5668\u7684MAC\uFF0C\u5426\u5219\u5219\u901A\u8FC7\u8DEF\u7531\u5668\u8FDB\u884C\u7C7B\u4F3C\u67E5\u627E\u3002</p></li></ol><blockquote><p>\u63A5\u4E0B\u6765\u662FARP\u534F\u8BAE\u6839\u636EIP\u5730\u5740\u67E5\u627EMAC\u5730\u5740\u7684\u8FC7\u7A0B:</p></blockquote><ul><li><p>\u82E5\u4E24\u53F0\u673A\u5668\u4E4B\u524D\u6709\u8FC7\u901A\u4FE1\uFF0C\u5728\u673A\u5668A\u7684ARP\u7F13\u5B58\u8868\u91CC\u5E94\u8BE5\u5B58\u6709B\u7684IP\u4E0E\u5176MAC\u5730\u5740\u7684\u6620\u5C04\u5173\u7CFB\u3002</p></li><li><p>\u82E5\u6CA1\u6709\uFF0C\u5219\u901A\u8FC7\u53D1\u9001ARP\u8BF7\u6C42\u5E7F\u64AD\uFF0C\u5F97\u5230\u56DE\u5E94\u7684B\u673A\u5668MAC\u5730\u5740\uFF0C\u5E76\u4EA4\u7ED9\u6570\u636E\u94FE\u8DEF\u5C42</p></li></ul><ol start="5"><li><p>\u6570\u636E\u94FE\u8DEF\u5C42\u6784\u5EFA\u4E00\u4E2A\u6570\u636E\u5E27\uFF0C\u76EE\u7684\u5730\u5740\u662FIP\u5C42\u4F20\u8FC7\u6765\u7684MAC\u5730\u5740\uFF0C\u6E90\u5730\u5740\u662F\u672C\u673A\u7684MAC\u5730\u5740\uFF0C\u518D\u9644\u52A0\u4E00\u4E9B\u5FC5\u8981\u7684\u63A7\u5236\u4FE1\u606F\uFF0C\u4F9D\u636E\u4EE5\u592A\u7F51\u7684\u4ECB\u8D28\u8BBF\u95EE\u89C4\u5219\u5C06\u4ED6\u4EEC\u4F20\u9001\u51FA\u53BB</p></li><li><p>\u673A\u5668B\u6536\u5230\u8FD9\u4E2A\u6570\u636E\u5E27\u540E\uFF0C\u5148\u68C0\u67E5\u76EE\u7684\u5730\u5740\uFF0C\u548C\u672C\u673AMAC\u5730\u5740\u5BF9\u6BD4\uFF1A</p></li></ol><p>\u7B26\u5408\uFF0C\u63A5\u53D7\uFF0C\u63A5\u6536\u540E\u68C0\u67E5\u8BE5\u6570\u636E\u5E27\uFF0C\u5C06IP\u6570\u636E\u5305\u4ECE\u5E27\u4E2D\u63D0\u53D6\u51FA\u6765\uFF0C\u4EA4\u7ED9\u672C\u673A\u7684\u7684IP\u5730\u5740\u534F\u8BAE\u5C42\u534F\u8BAE\uFF0CIP\u534F\u8BAE\u5C42\u68C0\u67E5\u4E4B\u540E\uFF0C\u5C06\u6709\u7528\u7684\u4FE1\u606F\u63D0\u53D6\u7ED9ICMP\u534F\u8BAE\uFF0C\u540E\u8005\u5904\u7406\uFF0C\u9A6C\u4E0A\u6784\u5EFA\u4E00\u4E2AICMP\u5E94\u7B54\u5305\uFF0C\u53D1\u9001\u7ED9A\uFF0C\u5176\u8FC7\u7A0B\u548C\u4E3B\u673AA\u53D1\u9001ICMP\u8BF7\u6C42\u5305\u5230B\u7684\u8FC7\u7A0B\u7C7B\u4F3C\uFF0C\u4F46\u4E0D\u7528ARP\u5E7F\u64AD\u6536\u53D6A\u7684\u4FE1\u606F\uFF0C\u56E0\u4E3A\u8BF7\u6C42\u5305\u4E2D\u5DF2\u7ECF\u6709\u8DB3\u591F\u7684\u4FE1\u606F\u7528\u4E8EB\u56DE\u5E94A\u3002</p><p>\u82E5\u4E0D\u7B26\u5408\uFF0C\u4E22\u5F03\u3002</p><p>\u53EF\u4EE5\u77E5\u9053PING\u7684\u8FC7\u7A0B\u5373\u4E00\u6BB5\u53D1\u9001\u62A5\u6587\u548C\u63A5\u53D7\u786E\u8BA4\u62A5\u6587\u7684\u8FC7\u7A0B\uFF0C\u5728\u6765\u56DE\u76F4\u63A5\u53EF\u4EE5\u8BA1\u7B97\u65F6\u5EF6\u3002</p><h3 id="dns" tabindex="-1"><a class="header-anchor" href="#dns" aria-hidden="true">#</a> DNS</h3><p>DNS\u901A\u8FC7\u4E3B\u673A\u540D\uFF0C\u6700\u7EC8\u5F97\u5230\u8BE5\u4E3B\u673A\u540D\u5BF9\u5E94\u7684IP\u5730\u5740\u7684\u8FC7\u7A0B\u53EB\u505A\u57DF\u540D\u89E3\u6790\uFF08\u6216\u4E3B\u673A\u540D\u89E3\u6790\uFF09\u3002</p><p><strong>\u901A\u4FD7\u7684\u8BB2</strong>\uFF0C\u6211\u4EEC\u66F4\u4E60\u60EF\u4E8E\u8BB0\u4F4F\u4E00\u4E2A\u7F51\u7AD9\u7684\u540D\u5B57\uFF0Cwww.baidu.com\uFF0C\u800C\u4E0D\u662F\u8BB0\u4F4F\u5B83\u7684ip\u5730\u5740\uFF0C\u6BD4\u5982\uFF1A167.23.10.2</p><p><strong>\u5DE5\u4F5C\u539F\u7406</strong></p><p>\u5C06\u4E3B\u673A\u57DF\u540D\u8F6C\u6362\u4E3Aip\u5730\u5740\uFF0C\u5C5E\u4E8E\u5E94\u7528\u5C42\u534F\u8BAE\uFF0C\u4F7F\u7528UDP\u4F20\u8F93\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-7d129644-dfa7-4151-ae2f-9f3f084c6be9.png" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-4ed70ed6-ceeb-4761-8fd4-eb2fe092273d.png" alt=""></p><p>\u7B2C\u4E00\u6B65\uFF0C\u5BA2\u6237\u7AEF\u5411\u672C\u5730DNS\u670D\u52A1\u5668\u53D1\u9001\u89E3\u6790\u8BF7\u6C42</p><p>\u7B2C\u4E8C\u6B65\uFF0C\u672C\u5730DNS\u5982\u6709\u76F8\u5E94\u8BB0\u5F55\u4F1A\u76F4\u63A5\u8FD4\u56DE\u7ED3\u679C\u7ED9\u5BA2\u6237\u7AEF\uFF0C\u5982\u6CA1\u6709\u5C31\u5411DNS\u6839\u670D\u52A1\u5668\u53D1\u9001\u8BF7\u6C42</p><p>\u7B2C\u4E09\u6B65,DSN\u6839\u670D\u52A1\u5668\u63A5\u6536\u5230\u8BF7\u6C42\uFF0C\u8FD4\u56DE\u7ED9\u672C\u5730\u670D\u52A1\u5668\u4E00\u4E2A\u6240\u67E5\u8BE2\u57DF\u7684\u4E3B\u57DF\u540D\u670D\u52A1\u5668\u7684\u5730\u5740</p><p>\u7B2C\u56DB\u6B65\uFF0C\u672C\u5730dns\u670D\u52A1\u5668\u518D\u5411\u8FD4\u56DE\u7684\u4E3B\u57DF\u540D\u670D\u52A1\u5668\u5730\u5740\u53D1\u9001\u67E5\u8BE2\u8BF7\u6C42</p><p>\u7B2C\u4E94\u6B65\uFF0C\u4E3B\u57DF\u540D\u670D\u52A1\u5668\u5982\u6709\u8BB0\u5F55\u5C31\u8FD4\u56DE\u7ED3\u679C\uFF0C\u6CA1\u6709\u7684\u8BDD\u8FD4\u56DE\u76F8\u5173\u7684\u4E0B\u7EA7\u57DF\u540D\u670D\u52A1\u5668\u5730\u5740</p><p>\u7B2C\u516D\u6B65\uFF0C\u672C\u5730DNS\u670D\u52A1\u5668\u7EE7\u7EED\u5411\u63A5\u6536\u5230\u7684\u5730\u5740\u8FDB\u884C\u67E5\u8BE2\u8BF7\u6C42</p><p>\u7B2C\u4E03\u6B65\uFF0C\u4E0B\u7EA7\u57DF\u540D\u670D\u52A1\u5668\u6709\u76F8\u5E94\u8BB0\u5F55\uFF0C\u8FD4\u56DE\u7ED3\u679C</p><p>\u7B2C\u516B\u6B65\uFF0C\u672C\u5730dns\u670D\u52A1\u5668\u5C06\u6536\u5230\u7684\u8FD4\u56DE\u5730\u5740\u53D1\u7ED9\u5BA2\u6237\u7AEF\uFF0C\u540C\u65F6\u5199\u5165\u81EA\u5DF1\u7684\u7F13\u5B58\uFF0C\u4EE5\u4FBF\u4E0B\u6B21\u67E5\u8BE2</p><p>DNS\u57DF\u540D\u67E5\u8BE2\u5B9E\u9645\u4E0A\u5C31\u662F\u4E2A\u4E0D\u65AD\u9012\u5F52\u67E5\u8BE2\u7684\u8FC7\u7A0B\uFF0C\u76F4\u5230\u67E5\u627E\u5230\u76F8\u5E94\u7ED3\u679C\uFF0C\u9700\u8981\u6CE8\u610F\u7684\u65F6\uFF0C\u5F53\u627E\u4E0D\u5230\u76F8\u5E94\u8BB0\u5F55\uFF0C\u4F1A\u8FD4\u56DE\u7A7A\u7ED3\u679C\uFF0C\u800C\u4E0D\u662F\u8D85\u65F6\u4FE1\u606F</p><h4 id="dns\u8BB0\u5F55" tabindex="-1"><a class="header-anchor" href="#dns\u8BB0\u5F55" aria-hidden="true">#</a> DNS\u8BB0\u5F55</h4><blockquote><p>A\u8BB0\u5F55</p></blockquote><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>\u5B9A\u4E49www.example.com\u7684ip\u5730\u5740
+import{_ as r}from"./plugin-vue_export-helper.21dcd24c.js";import{r as n,o as s,c as a,a as e,b as o,d as p,e as i}from"./app.615e41d8.js";const l={},d=e("h1",{id:"\u8BA1\u7B97\u673A\u7F51\u7EDC\u6838\u5FC3\u77E5\u8BC6\u70B9\u5927\u68B3\u7406",tabindex:"-1"},[e("a",{class:"header-anchor",href:"#\u8BA1\u7B97\u673A\u7F51\u7EDC\u6838\u5FC3\u77E5\u8BC6\u70B9\u5927\u68B3\u7406","aria-hidden":"true"},"#"),p(" \u8BA1\u7B97\u673A\u7F51\u7EDC\u6838\u5FC3\u77E5\u8BC6\u70B9\u5927\u68B3\u7406")],-1),c=p("\u4F5C\u8005\uFF1A\u6708\u4F34\u98DE\u9C7C\uFF0C\u8F6C\u8F7D\u94FE\u63A5\uFF1A"),g={href:"https://mp.weixin.qq.com/s/7EddtzpwIRvYfw34QE4zvw",target:"_blank",rel:"noopener noreferrer"},P=p("https://mp.weixin.qq.com/s/7EddtzpwIRvYfw34QE4zvw"),h=i(`<p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-608345cf-8378-4b34-bc91-ca6d2fa25da7.png" alt=""></p><h2 id="osi\u4E03\u5C42\u6A21\u578B" tabindex="-1"><a class="header-anchor" href="#osi\u4E03\u5C42\u6A21\u578B" aria-hidden="true">#</a> OSI\u4E03\u5C42\u6A21\u578B</h2><p><strong>\u7269\u7406\u5C42</strong></p><p>\u9996\u5148\u89E3\u51B3\u4E24\u53F0\u7269\u7406\u673A\u4E4B\u95F4\u7684\u901A\u4FE1\u9700\u6C42\uFF0C\u5177\u4F53\u5C31\u662F\u673A\u5668A\u5F80\u673A\u5668B\u53D1\u9001\u6BD4\u7279\u6D41\uFF0C\u673A\u5668B\u80FD\u6536\u5230\u6BD4\u7279\u6D41\u3002</p><p>\u7269\u7406\u5C42\u4E3B\u8981\u5B9A\u4E49\u4E86\u7269\u7406\u8BBE\u5907\u7684\u6807\u51C6\uFF0C\u5982\u7F51\u7EBF\u7684\u7C7B\u578B\uFF0C\u5149\u7EA4\u7684\u63A5\u53E3\u7C7B\u578B\uFF0C\u5404\u79CD\u4F20\u8F93\u4ECB\u8D28\u7684\u4F20\u8F93\u901F\u7387\u3002</p><p>\u4E3B\u8981\u4F5C\u7528\u662F\u4F20\u8F93\u6BD4\u7279\u6D41\uFF08<code>0101</code>\u4E8C\u8FDB\u5236\u6570\u636E\uFF09\uFF0C\u5C06\u6BD4\u7279\u6D41\u8F6C\u5316\u4E3A\u7535\u6D41\u5F3A\u5F31\u4F20\u8F93\uFF0C\u5230\u8FBE\u76EE\u7684\u540E\u518D\u8F6C\u5316\u4E3A\u6BD4\u7279\u6D41\uFF0C\u5373\u5E38\u8BF4\u7684\u6570\u6A21\u8F6C\u5316\u548C\u6A21\u6570\u8F6C\u6362\u3002</p><p>\u8FD9\u5C42\u6570\u636E\u53EB\u505A\u6BD4\u7279\u3002<strong>\u7F51\u5361\u5DE5\u4F5C\u5728\u8FD9\u5C42</strong>\u3002</p><p>\u7269\u7406\u5C42\u662FOSI\u4E03\u5C42\u6A21\u578B\u7684\u7269\u7406\u57FA\u7840\uFF0C\u6CA1\u6709\u5B83\u5C31\u8C08\u4E0D\u4E0A\u6570\u636E\u4F20\u8F93\u4E86</p><p>\u7269\u7406\u5C42\u5C31\u662F\u7531\u5B9E\u7269\u6240\u627F\u8F7D\u7684\uFF0C\u6240\u4EE5\u4F5C\u6BD4\u55BB\u7684\u8BDD\uFF0C\u516C\u8DEF\u3001\u6C7D\u8F66\u548C\u98DE\u673A\u7B49\u627F\u8F7D\u8D27\u7269\uFF08\u6570\u636E\uFF09\u7684\u4EA4\u901A\u5DE5\u5177\uFF0C\u5C31\u662F\u7269\u7406\u5C42\u7684\u8C61\u5F81</p><p><strong>\u6570\u636E\u94FE\u8DEF\u5C42</strong></p><p>\u5728\u4F20\u8F93\u6BD4\u7279\u6D41\u7684\u8FC7\u7A0B\u4E2D\uFF0C\u4F1A\u4EA7\u751F\u9519\u4F20\u3001\u6570\u636E\u4F20\u8F93\u4E0D\u5B8C\u6574\u7684\u53EF\u80FD\u3002</p><p>\u6570\u636E\u94FE\u8DEF\u5C42\u5B9A\u4E49\u4E86<strong>\u5982\u4F55\u683C\u5F0F\u5316\u6570\u636E\u8FDB\u884C\u4F20\u8F93</strong>\uFF0C\u4EE5\u53CA\u5982\u4F55\u63A7\u5236\u5BF9\u7269\u7406\u4ECB\u8D28\u7684\u8BBF\u95EE\u3002\u901A\u5E38\u63D0\u4F9B\u9519\u8BEF\u68C0\u6D4B\u548C\u7EA0\u6B63\uFF0C\u4EE5\u786E\u4FDD\u6570\u636E\u4F20\u8F93\u7684\u51C6\u786E\u6027\u3002</p><p>\u672C\u5C42\u5C06\u6BD4\u7279\u6570\u636E\u7EC4\u6210\u5E27\uFF0C\u4EA4\u6362\u673A\u5DE5\u4F5C\u5728\u8FD9\u5C42\uFF0C\u5BF9\u5E27\u89E3\u7801\uFF0C\u5E76\u6839\u636E\u5E27\u4E2D\u5305\u542B\u7684\u4FE1\u606F\u628A\u6570\u636E\u53D1\u9001\u5230\u6B63\u786E\u7684\u63A5\u6536\u65B9\u3002</p><p>\u8BE5\u5C42\u8D1F\u8D23\u7269\u7406\u5C42\u9762\u4E0A\u4E92\u8FDE\u7684\u8282\u70B9\u4E4B\u95F4\u7684\u901A\u4FE1\u4F20\u8F93\u3002\u4F8B\u5982\u4E0E1\u4E2A\u4EE5\u592A\u7F51\u76F8\u8FDE\u7684\u4E24\u4E2A\u8282\u70B9\u95F4\u7684\u901A\u8BAF\u3002</p><p>\u5E38\u89C1\u7684\u534F\u8BAE\u6709 <code>HDLC\u3001PPP\u3001SLIP</code>\u7B49</p><p>\u6570\u636E\u94FE\u8DEF\u5C42\u4F1A\u5C06<code>0\u30011</code>\u5E8F\u5217\u5212\u5206\u4E3A\u5177\u6709\u610F\u4E49\u7684\u6570\u636E\u5E27\u4F20\u9001\u7ED9\u5BF9\u7AEF\uFF08<strong>\u6570\u636E\u5E27\u7684\u751F\u6210\u4E0E\u63A5\u6536</strong>\uFF09</p><p><strong>\u7F51\u7EDC\u5C42</strong></p><p>\u968F\u7740\u7F51\u7EDC\u8282\u70B9\u7684\u4E0D\u65AD\u589E\u52A0\uFF0C\u70B9\u5BF9\u70B9\u901A\u8BAF\u9700\u8981\u901A\u8FC7\u591A\u4E2A\u8282\u70B9\uFF0C\u5982\u4F55\u627E\u5230\u76EE\u6807\u8282\u70B9\uFF0C\u5982\u4F55\u9009\u62E9\u6700\u4F73\u8DEF\u5F84\u6210\u4E3A\u9996\u8981\u9700\u6C42\u3002</p><p>\u7F51\u7EDC\u5C42\u4E3B\u8981\u529F\u80FD\u662F\u5C06\u7F51\u7EDC\u5730\u5740\u8F6C\u5316\u4E3A\u5BF9\u5E94\u7684\u7269\u7406\u5730\u5740\uFF0C\u5E76\u51B3\u5B9A\u5982\u4F55\u5C06\u6570\u636E\u4ECE\u53D1\u9001\u65B9\u8DEF\u7531\u5230\u63A5\u6536\u65B9\u3002</p><p>\u7F51\u7EDC\u5C42\u901A\u8FC7\u7EFC\u5408\u8003\u8651\u53D1\u9001\u4F18\u5148\u6743\u3001\u7F51\u7EDC\u62E5\u585E\u7A0B\u5EA6\u3001\u670D\u52A1\u8D28\u91CF\u4EE5\u53CA\u53EF\u9009\u8DEF\u7531\u7684\u82B1\u8D39\u6765\u51B3\u5B9A\u4ECE\u4E00\u4E2A\u7F51\u7EDC\u4E2D\u8282\u70B9A\u5230\u53E6\u4E00\u4E2A\u7F51\u7EDC\u4E2D\u8282\u70B9B\u7684\u6700\u4F73\u8DEF\u5F84\u3002</p><p>\u7531\u4E8E\u7F51\u7EDC\u5C42\u5904\u7406\u5E76\u667A\u80FD\u6307\u5BFC\u6570\u636E\u4F20\u9001\uFF0C\u8DEF\u7531\u5668\u8FDE\u63A5\u7F51\u7EDC\u9694\u65AD\uFF0C\u6240\u4EE5\u8DEF\u7531\u5668\u5C5E\u4E8E\u7F51\u7EDC\u5C42\u3002</p><p>\u6B64\u5C42\u7684\u6570\u636E\u79F0\u4E4B\u4E3A\u6570\u636E\u5305\u3002\u672C\u5C42\u9700\u8981\u5173\u6CE8\u7684\u534F\u8BAE<code>TCP/IP</code>\u534F\u8BAE\u4E2D\u7684IP\u534F\u8BAE\u3002</p><p>\u7F51\u7EDC\u5C42\u8D1F\u8D23\u5C06\u6570\u636E\u4F20\u8F93\u5230\u76EE\u6807\u5730\u5740\u3002\u76EE\u6807\u5730\u5740\u53EF\u4EE5\u4F7F\u591A\u4E2A\u7F51\u7EDC\u901A\u8FC7\u8DEF\u7531\u5668\u8FDE\u63A5\u800C\u6210\u7684\u67D0\u4E00\u4E2A\u5730\u5740\u3002\u56E0\u6B64\u8FD9\u4E00\u5C42\u4E3B\u8981\u8D1F\u8D23<strong>\u5BFB\u5740\u548C\u8DEF\u7531\u9009\u62E9</strong>\u3002\u4E3B\u8981\u7531 <code>IP\u3001ICMP</code> \u4E24\u4E2A\u534F\u8BAE\u7EC4\u6210</p><p>\u7F51\u7EDC\u5C42\u5C06\u6570\u636E\u4ECE\u53D1\u9001\u7AEF\u7684\u4E3B\u673A\u53D1\u9001\u5230\u63A5\u6536\u7AEF\u7684\u4E3B\u673A\uFF0C\u4E24\u53F0\u4E3B\u673A\u95F4\u53EF\u80FD\u4F1A\u5B58\u5728\u5F88\u591A\u6570\u636E\u94FE\u8DEF\uFF0C\u4F46\u7F51\u7EDC\u5C42\u5C31\u662F\u8D1F\u8D23\u627E\u51FA\u4E00\u6761\u76F8\u5BF9\u987A\u7545\u7684\u901A\u8DEF\u5C06\u6570\u636E\u4F20\u9012\u8FC7\u53BB\u3002\u4F20\u8F93\u7684\u5730\u5740\u4F7F\u7528\u7684\u662FIP\u5730\u5740\u3002IP\u5730\u5740\u901A\u8FC7\u4E0D\u65AD\u8F6C\u53D1\u5230\u66F4\u8FD1\u7684IP\u5730\u5740\uFF0C\u6700\u7EC8\u53EF\u4EE5\u5230\u8FBE\u76EE\u6807\u5730\u5740</p><p><strong>\u4F20\u8F93\u5C42</strong></p><p>\u968F\u7740\u7F51\u7EDC\u901A\u4FE1\u9700\u6C42\u7684\u8FDB\u4E00\u6B65\u6269\u5927\uFF0C\u901A\u4FE1\u8FC7\u7A0B\u4E2D\u9700\u8981\u53D1\u9001\u5927\u91CF\u7684\u6570\u636E\uFF0C\u5982\u6D77\u91CF\u6587\u4EF6\u4F20\u8F93\uFF0C\u53EF\u80FD\u9700\u8981\u5F88\u957F\u65F6\u95F4\uFF0C\u7F51\u7EDC\u5728\u901A\u4FE1\u7684\u8FC7\u7A0B\u4E2D\u4F1A\u4E2D\u65AD\u5F88\u591A\u6B21\uFF0C\u6B64\u65F6\u4E3A\u4E86\u4FDD\u8BC1\u4F20\u8F93\u5927\u91CF\u6587\u4EF6\u65F6\u7684\u51C6\u786E\u6027\uFF0C\u9700\u8981\u5BF9\u53D1\u9001\u51FA\u53BB\u7684\u6570\u636E\u8FDB\u884C\u5207\u5206\uFF0C\u5207\u5272\u4E3A\u4E00\u4E2A\u4E00\u4E2A\u7684\u6BB5\u843D\uFF08<code>Segement</code>\uFF09\u53D1\u9001\uFF0C\u5176\u4E2D\u4E00\u4E2A\u6BB5\u843D\u4E22\u5931\u662F\u5426\u91CD\u4F20\uFF0C\u6BB5\u843D\u662F\u5426\u6309\u987A\u5E8F\u5230\u8FBE\uFF0C\u662F\u4F20\u8F93\u5C42\u9700\u8981\u8003\u8651\u7684\u95EE\u9898\u3002</p><p>\u4F20\u8F93\u5C42\u89E3\u51B3\u4E86\u4E3B\u673A\u95F4\u7684\u6570\u636E\u4F20\u8F93\uFF0C\u6570\u636E\u95F4\u7684\u4F20\u8F93\u53EF\u4EE5\u662F\u4E0D\u540C\u7F51\u7EDC\uFF0C\u5E76\u4E14\u4F20\u8F93\u5C42\u89E3\u51B3\u4E86<strong>\u4F20\u8F93\u8D28\u91CF</strong>\u7684\u95EE\u9898\u3002</p><p>\u4F20\u8F93\u5C42\u9700\u8981\u5173\u6CE8\u7684\u534F\u8BAE\u6709TCP/IP\u534F\u8BAE\u4E2D\u7684<code>TCP</code>\u534F\u8BAE\u548C<code>UDP</code>\u534F\u8BAE\u3002</p><p><strong>\u4F1A\u8BDD\u5C42</strong></p><p>\u81EA\u52A8\u6536\u53D1\u5305\uFF0C\u81EA\u52A8\u5BFB\u5740\u3002</p><p>\u4F1A\u8BDD\u5C42\u4F5C\u7528\u662F<strong>\u8D1F\u8D23\u5EFA\u7ACB\u548C\u65AD\u5F00\u901A\u4FE1\u8FDE\u63A5</strong>\uFF0C\u4F55\u65F6\u5EFA\u7ACB\uFF0C\u65AD\u5F00\u8FDE\u63A5\u4EE5\u53CA\u4FDD\u6301\u591A\u4E45\u7684\u8FDE\u63A5\u3002\u5E38\u89C1\u7684\u534F\u8BAE\u6709 <code>ADSP\u3001RPC</code> \u7B49</p><p><strong>\u8868\u793A\u5C42</strong></p><p>Linux\u7ED9WIndows\u53D1\u5305\uFF0C\u4E0D\u540C\u7CFB\u7EDF\u8BED\u6CD5\u4E0D\u4E00\u81F4\uFF0C\u5982exe\u4E0D\u80FD\u5728<code>Linux</code>\u4E0B\u6267\u884C\uFF0Cshell\u4E0D\u80FD\u5728Windows\u4E0D\u80FD\u76F4\u63A5\u8FD0\u884C\u3002\u4E8E\u662F\u9700\u8981\u8868\u793A\u5C42\u3002</p><p>\u89E3\u51B3<strong>\u4E0D\u540C\u7CFB\u7EDF\u4E4B\u95F4\u901A\u4FE1\u8BED\u6CD5\u95EE\u9898</strong>\uFF0C\u5728\u8868\u793A\u5C42\u6570\u636E\u5C06\u6309\u7167\u7F51\u7EDC\u80FD\u7406\u89E3\u7684\u65B9\u6848\u8FDB\u884C\u683C\u5F0F\u5316\uFF0C\u683C\u5F0F\u5316\u56E0\u6240\u4F7F\u7528\u7F51\u7EDC\u7684\u4E0D\u540C\u800C\u4E0D\u540C\u3002</p><p>\u5B83\u4E3B\u8981\u8D1F\u8D23\u6570\u636E\u683C\u5F0F\u7684\u8F6C\u6362\u3002\u5177\u4F53\u6765\u8BF4\uFF0C\u5C31\u662F\u8BB2\u8BBE\u5907\u56FA\u6709\u7684\u6570\u636E\u683C\u5F0F\u8F6C\u6362\u4E3A\u7F51\u7EDC\u6807\u51C6\u683C\u5F0F\u3002\u5E38\u89C1\u7684\u534F\u8BAE\u6709<code>ASCII\u3001SSL/TLS</code> \u7B49</p><p><strong>\u5E94\u7528\u5C42</strong></p><p>\u89C4\u5B9A\u53D1\u9001\u65B9\u548C\u63A5\u6536\u65B9\u5FC5\u987B\u4F7F\u7528\u4E00\u4E2A\u56FA\u5B9A\u957F\u5EA6\u7684\u6D88\u606F\u5934\uFF0C\u6D88\u606F\u5934\u5FC5\u987B\u4F7F\u7528\u67D0\u79CD\u56FA\u5B9A\u7684\u7EC4\u6210\uFF0C\u6D88\u606F\u5934\u4E2D\u5FC5\u987B\u8BB0\u5F55\u6D88\u606F\u4F53\u7684\u957F\u5EA6\u7B49\u4FE1\u606F\uFF0C\u65B9\u4FBF\u63A5\u6536\u65B9\u6B63\u786E\u89E3\u6790\u53D1\u9001\u65B9\u53D1\u9001\u7684\u6570\u636E\u3002</p><p>\u5E94\u7528\u5C42\u65E8\u5728\u66F4<strong>\u65B9\u4FBF\u5E94\u7528\u4ECE\u7F51\u7EDC\u4E2D\u63A5\u6536\u7684\u6570\u636E</strong>\uFF0C\u91CD\u70B9\u5173\u6CE8<code>TCP/IP</code>\u534F\u8BAE\u4E2D\u7684HTTP\u534F\u8BAE</p><p>\u56DB\u5C42\u4F20\u8F93\u5C42\u6570\u636E\u88AB\u79F0\u4F5C<strong>\u6BB5</strong>\uFF08Segments\uFF09\uFF1B</p><p>\u4E09\u5C42\u7F51\u7EDC\u5C42\u6570\u636E\u88AB\u79F0\u505A<strong>\u5305</strong>\uFF08Packages\uFF09\uFF1B</p><p>\u4E8C\u5C42\u6570\u636E\u94FE\u8DEF\u5C42\u65F6\u6570\u636E\u88AB\u79F0\u4E3A<strong>\u5E27</strong>\uFF08Frames\uFF09\uFF1B</p><p>\u4E00\u5C42\u7269\u7406\u5C42\u65F6\u6570\u636E\u88AB\u79F0\u4E3A<strong>\u6BD4\u7279\u6D41</strong>\uFF08Bits\uFF09\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-d1fdc5fc-c955-4591-9c95-e297a64eccdc.png" alt=""></p><h2 id="tcp\u548Cip\u6A21\u578B" tabindex="-1"><a class="header-anchor" href="#tcp\u548Cip\u6A21\u578B" aria-hidden="true">#</a> TCP\u548CIP\u6A21\u578B</h2><p>OSI\u6A21\u578B\u6CE8\u91CD\u901A\u4FE1\u534F\u8BAE\u5FC5\u8981\u7684\u529F\u80FD\uFF1BTCP/IP\u66F4\u5F3A\u8C03\u5728\u8BA1\u7B97\u673A\u4E0A\u5B9E\u73B0\u534F\u8BAE\u5E94\u8BE5\u5F00\u53D1\u54EA\u79CD\u7A0B\u5E8F</p><p><strong>TCP/IP\u5212\u5206\u4E86\u56DB\u5C42\u7F51\u7EDC\u6A21\u578B</strong></p><ul><li>\u7B2C\u4E00\u5C42\uFF1A\u5E94\u7528\u5C42\uFF0C\u4E3B\u8981\u6709\u8D1F\u8D23web\u6D4F\u89C8\u5668\u7684HTTP\u534F\u8BAE\uFF0C \u6587\u4EF6\u4F20\u8F93\u7684FTP\u534F\u8BAE\uFF0C\u8D1F\u8D23\u7535\u5B50\u90AE\u4EF6\u7684SMTP\u534F\u8BAE\uFF0C\u8D1F\u8D23\u57DF\u540D\u7CFB\u7EDF\u7684DNS\u7B49</li><li>\u7B2C\u4E8C\u5C42\uFF1A\u4F20\u8F93\u5C42\uFF0C\u4E3B\u8981\u662F\u6709<strong>\u53EF\u9760\u4F20\u8F93</strong>\u7684TCP\u534F\u8BAE\uFF0C\u7279\u522B<strong>\u9AD8\u6548</strong>\u7684UDP\u534F\u8BAE\u3002\u4E3B\u8981\u8D1F\u8D23\u4F20\u8F93\u5E94\u7528\u5C42\u7684\u6570\u636E\u5305\u3002</li><li>\u7B2C\u4E09\u5C42\uFF1A\u7F51\u7EDC\u5C42\uFF0C\u4E3B\u8981\u662FIP\u534F\u8BAE\u3002\u4E3B\u8981\u8D1F\u8D23\u5BFB\u5740\uFF08\u627E\u5230\u76EE\u6807\u8BBE\u5907\u7684\u4F4D\u7F6E\uFF09</li><li>\u7B2C\u56DB\u5C42\uFF1A\u6570\u636E\u94FE\u8DEF\u5C42\uFF0C\u4E3B\u8981\u662F\u8D1F\u8D23\u8F6C\u6362\u6570\u5B57\u4FE1\u53F7\u548C\u7269\u7406\u4E8C\u8FDB\u5236\u4FE1\u53F7\u3002</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-fa4a4d20-f0db-4ba7-a31e-7772f2f132a8.png" alt=""></p><p><strong>\u56DB\u5C42\u7F51\u7EDC\u534F\u8BAE\u7684\u4F5C\u7528</strong></p><ul><li>\u53D1\u9001\u7AEF\u662F\u7531\u4E0A\u81F3\u4E0B\uFF0C\u628A\u4E0A\u5C42\u6765\u7684\u6570\u636E\u5728\u5934\u90E8\u52A0\u4E0A\u5404\u5C42\u534F\u8BAE\u7684\u6570\u636E\uFF08\u90E8\u9996\uFF09\u518D\u4E0B\u53D1\u7ED9\u4E0B\u5C42\u3002</li><li>\u63A5\u53D7\u7AEF\u5219\u7531\u4E0B\u800C\u4E0A\uFF0C\u628A\u4ECE\u4E0B\u5C42\u63A5\u53D7\u5230\u7684\u6570\u636E\u8FDB\u884C\u89E3\u5BC6\u548C\u53BB\u6389\u5934\u90E8\u7684\u90E8\u9996\u540E\u518D\u53D1\u9001\u7ED9\u4E0A\u5C42\u3002</li><li>\u5C42\u5C42\u52A0\u5BC6\u548C\u89E3\u5BC6\u540E\uFF0C\u5E94\u7528\u5C42\u6700\u7EC8\u62FF\u5230\u4E86\u9700\u8981\u7684\u6570\u636E\u3002</li></ul><p><strong>\u4E3E\u4E2A\u4F8B\u5B50\uFF1A</strong></p><p>\u6211\u4EEC\u9700\u8981\u53D1\u9001\u4E00\u4E2A<strong>index.html</strong>\u3002</p><p>\u4E24\u53F0\u7535\u8111\u5728\u5E94\u7528\u5C42\u90FD\u4F7F\u7528HTTP\u534F\u8BAE\uFF08\u5373\u90FD\u4F7F\u7528\u6D4F\u89C8\u5668\uFF09\u3002</p><p>\u5728\u4F20\u8F93\u5C42\uFF0CTCP\u534F\u8BAE\u4F1A\u5C06HTTP\u534F\u8BAE\u53D1\u9001\u7684\u6570\u636E\u770B\u4F5C\u4E00\u4E2A\u6570\u636E\u5305\uFF0C\u5E76\u5728\u8FD9\u4E2A\u6570\u636E\u5305\u524D\u9762\u52A0\u4E0ATCP\u5305\u7684\u4E00\u90E8\u5206\u4FE1\u606F\uFF08\u90E8\u9996\uFF09</p><p>\u5728\u7F51\u7EDC\u5C42\uFF0CIP\u534F\u8BAE\u4F1A\u5C06TCP\u534F\u8BAE\u8981\u53D1\u9001\u7684\u6570\u636E\u770B\u4F5C\u4E00\u4E2A\u6570\u636E\u5305\uFF0C\u540C\u6837\u7684\u5728\u8FD9\u4E2A\u6570\u636E\u5305\u524D\u7AEF\u52A0\u4E0AIP\u534F\u8BAE\u7684\u90E8\u9996</p><p>\u5728\u6570\u636E\u94FE\u8DEF\u5C42\uFF0C\u5BF9\u5E94\u7684\u534F\u8BAE\u4E5F\u4F1A\u5728IP\u6570\u636E\u5305\u524D\u7AEF\u52A0\u4E0A\u4EE5\u592A\u7F51\u7684\u90E8\u9996\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-1d3ce227-fd77-4b95-89dd-aeb786bb4b9e.png" alt=""></p><p>\u6E90\u8BBE\u5907\u548C\u76EE\u6807\u8BBE\u5907\u901A\u8FC7\u7F51\u7EBF\u8FDE\u63A5\uFF0C\u5C31\u53EF\u4EE5\u901A\u8FC7\u7269\u7406\u5C42\u7684\u4E8C\u8FDB\u5236\u4F20\u8F93\u6570\u636E\u3002</p><p>\u6570\u636E\u94FE\u8DEF\u5C42\uFF0C\u4F1A\u4F7F\u7528\u5BF9\u5E94\u7684\u534F\u8BAE\u627E\u5230\u7269\u7406\u5C42\u7684\u4E8C\u8FDB\u5236\u6570\u636E\uFF0C\u89E3\u7801\u5F97\u5230\u4EE5\u592A\u7F51\u7684\u90E8\u9996\u4FE1\u606F\u548C\u5BF9\u5E94\u7684IP\u6570\u636E\u5305\uFF0C\u518D\u5C06IP\u6570\u636E\u5305\u4F20\u7ED9\u4E0A\u5C42\u7684\u7F51\u7EDC\u5C42\u3002</p><p>\u6570\u636E\u94FE\u8DEF\u5C42&gt;\u7F51\u7EDC\u5C42&gt;\u4F20\u8F93\u5C42&gt;\u5E94\u7528\u5C42\uFF0C\u4E00\u5C42\u5C42\u7684\u89E3\u7801\uFF0C\u6700\u540E\u5C31\u53EF\u4EE5\u5728\u6D4F\u89C8\u5668\u4E2D\u5F97\u5230\u76EE\u6807\u8BBE\u5907\u4F20\u9001\u8FC7\u6765\u7684<strong>index.html</strong>\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-731f7daa-1b47-4191-828f-c6e54d650604.png" alt=""></p><p><strong>TCP/IP\u534F\u8BAE\u65CF</strong></p><p>\u4ECE\u5B57\u9762\u610F\u4E49\u4E0A\u6765\u8BB2\uFF0CTCP/IP\u662F\u6307<strong>\u4F20\u8F93\u5C42</strong>\u7684TCP\u534F\u8BAE\u548C<strong>\u7F51\u7EDC\u5C42</strong>\u7684IP\u534F\u8BAE\u3002</p><p>\u5B9E\u9645\u4E0A\uFF0CTCP/IP\u53EA\u662F\u5229\u7528 IP \u8FDB\u884C\u901A\u4FE1\u65F6\u6240\u5FC5\u987B\u7528\u5230\u7684\u534F\u8BAE\u7FA4\u7684\u7EDF\u79F0\u3002</p><p>\u5177\u4F53\u6765\u8BF4\uFF0C\u5728\u7F51\u7EDC\u5C42\u662FIP/ICMP\u534F\u8BAE\u3001\u5728\u4F20\u8F93\u5C42\u662FTCP/UDP\u534F\u8BAE\u3001\u5728\u5E94\u7528\u5C42\u662FSMTP\u3001FTP\u3001\u4EE5\u53CA HTTP \u7B49\u3002\u4ED6\u4EEC\u90FD\u5C5E\u4E8E TCP/IP \u534F\u8BAE\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><h2 id="\u7F51\u7EDC\u8BBE\u5907" tabindex="-1"><a class="header-anchor" href="#\u7F51\u7EDC\u8BBE\u5907" aria-hidden="true">#</a> \u7F51\u7EDC\u8BBE\u5907</h2><h3 id="\u4EA4\u6362\u673A" tabindex="-1"><a class="header-anchor" href="#\u4EA4\u6362\u673A" aria-hidden="true">#</a> \u4EA4\u6362\u673A</h3><p>\u4EA4\u6362\u673A\u53EF\u4EE5\u63A5\u5165\u591A\u53F0\u7535\u8111</p><p>\u6BCF\u4E2A\u7535\u8111\u7F51\u5361\u7684 <strong>MAC \u5730\u5740</strong>\u90FD\u662F\u4E0D\u4E00\u6837\u7684\uFF0C\u7535\u8111\u53D1\u9001\u6570\u636E\u65F6\uFF0C\u6570\u636E\u5934\u90E8\u643A\u5E26\u7F51\u5361\u7684 MAC \u5730\u5740\uFF0C\u7528 MAC \u5730\u5740\u6807\u8BC6\u6765\u4E0D\u540C\u7684\u7535\u8111</p><p>\u4EA4\u6362\u673A\u5C31\u53EF\u4EE5\u8BC6\u522B\u6570\u636E\u5934\u90E8\u7684 MAC \u5730\u5740\u6765\u533A\u5206\u4E0D\u540C\u7684\u7535\u8111</p><p>\u4EA4\u6362\u673A\u9664\u4E86\u80FD\u8BC6\u522B\u4E0D\u540C\u7684\u7535\u8111\uFF0C\u8FD8\u9700\u8981\u627E\u5230\u7535\u8111\u8FDE\u63A5\u7684<strong>\u4EA4\u6362\u673A\u7AEF\u53E3</strong>\uFF0C\u624D\u80FD\u987A\u5229\u7684\u628A\u6570\u636E\u4ECE\u76F8\u5E94\u7AEF\u53E3\u53D1\u9001\u51FA\u53BB</p><p>\u4EA4\u6362\u673A\u901A\u8FC7<strong>\u81EA\u5B66\u673A\u5236</strong>\uFF0C\u628A\u5B66\u4E60\u5230\u7684\u8BBE\u5907 MAC \u5730\u5740\u548C\u4EA4\u6362\u673A\u7AEF\u53E3\u53F7\u6DFB\u52A0\u5230 <strong>MAC \u5730\u5740\u8868</strong>\uFF0C\u5E76\u6839\u636E MAC \u5730\u5740\u8868\u8FDB\u884C\u6570\u636E<strong>\u8F6C\u53D1</strong></p><h3 id="\u8DEF\u7531\u5668" tabindex="-1"><a class="header-anchor" href="#\u8DEF\u7531\u5668" aria-hidden="true">#</a> \u8DEF\u7531\u5668</h3><p>\u4EA4\u6362\u673A\u9700\u8981\u8BB0\u5F55\u7684 MAC \u5730\u5740\u8868\u4E5F\u8D8A\u6765\u8D8A\u591A\uFF0C\u9700\u8981\u7684\u4EA4\u6362\u673A\u4E5F\u8D8A\u6765\u8D8A\u591A</p><p>\u4F46\u662F\u4EA4\u6362\u673A\u7684<strong>\u5BB9\u91CF\u548C\u6027\u80FD\u6709\u9650</strong>\uFF0CMAC \u5730\u5740\u8868\u65E0\u6CD5\u8BB0\u5F55\u5168\u4E16\u754C\u7535\u8111\u7684 MAC \u5730\u5740\u548C\u5BF9\u5E94\u7684\u7AEF\u53E3\u53F7\uFF0CMAC \u5730\u5740\u8868\u592A\u5927\u4E5F\u65E0\u6CD5\u5FEB\u901F\u67E5\u627E\u5230\u5BF9\u5E94\u7684 MAC \u5730\u5740\u8868\u9879</p><p>\u4E8E\u662F\u5C31\u6709\u4E86\u4E09\u5C42\u7F51\u7EDC\u8BBE\u5907<strong>\u8DEF\u7531\u5668</strong>\uFF0C\u8DEF\u7531\u5668\u53EF\u4EE5\u628A\u5168\u4E16\u754C\u7684\u7F51\u7EDC\u8FDE\u63A5\u8D77\u6765</p><p>\u5C40\u57DF\u7F51\u5185\u7684\u7F51\u7EDC\u8FDE\u63A5\u53EF\u4EE5\u4F7F\u7528<strong>\u4EA4\u6362\u673A</strong>\uFF0C\u4F8B\u5982\u4E00\u4E2A\u516C\u53F8\u5185\u7684\u7F51\u7EDC\u6216\u8005\u4E00\u4E2A\u6821\u56ED\u5185\u7684\u7F51\u7EDC\u901A\u8FC7\u4EA4\u6362\u673A\u8FDE\u63A5</p><p>\u4E0D\u540C\u533A\u57DF\u7684\u5C40\u57DF\u7F51\u4E92\u8054\u4F7F\u7528<strong>\u8DEF\u7531\u5668</strong></p><blockquote><p>\u90A3\u4E48\u5982\u4F55\u533A\u5206\u4E0D\u540C\u7684\u7F51\u7EDC\u533A\u57DF\u5462\uFF1F\u53C8\u662F\u5982\u4F55\u8DE8\u7F51\u7EDC\u533A\u57DF\u8FDB\u884C\u6570\u636E\u8F6C\u53D1\u7684\u5462\uFF1F</p></blockquote><p>\u8DEF\u7531\u5668\u6709\u591A\u4E2A\u7AEF\u53E3\uFF0C\u5206\u522B\u8FDE\u63A5\u4E0D\u540C\u7684\u7F51\u7EDC\u533A\u57DF\uFF0C\u4E0D\u540C\u7F51\u7EDC\u533A\u57DF\u7684 IP \u5730\u5740<strong>\u7F51\u7EDC\u53F7\u4E0D\u540C</strong></p><p>\u5B83\u901A\u8FC7\u8BC6\u522B\u76EE\u7684 IP \u5730\u5740\u7684<strong>\u7F51\u7EDC\u53F7</strong>\uFF0C\u518D\u6839\u636E<strong>\u8DEF\u7531\u8868</strong>\u8FDB\u884C\u6570\u636E\u8F6C\u53D1</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><h2 id="http" tabindex="-1"><a class="header-anchor" href="#http" aria-hidden="true">#</a> HTTP</h2><p><strong>\u8BF7\u6C42\u65B9\u6CD5</strong></p><p>HTTP1.0 \u5B9A\u4E49\u4E86\u4E09\u79CD\u8BF7\u6C42\u65B9\u6CD5\uFF1A GET, POST \u548C HEAD\u65B9\u6CD5\u3002</p><p>HTTP1.1 \u65B0\u589E\u4E86\u516D\u79CD\u8BF7\u6C42\u65B9\u6CD5\uFF1AOPTIONS\u3001PUT\u3001PATCH\u3001DELETE\u3001TRACE \u548C CONNECT \u65B9\u6CD5\u3002</p><table><thead><tr><th>\u5E8F \u53F7</th><th>\u65B9\u6CD5</th><th>\u63CF\u8FF0</th></tr></thead><tbody><tr><td>1</td><td>GET</td><td>\u8BF7\u6C42\u6307\u5B9A\u7684\u9875\u9762\u4FE1\u606F\uFF0C\u5E76\u8FD4\u56DE\u5B9E\u4F53\u4E3B\u4F53\u3002</td></tr><tr><td>2</td><td>HEAD</td><td>\u7C7B\u4F3C\u4E8E GET \u8BF7\u6C42\uFF0C\u53EA\u4E0D\u8FC7\u8FD4\u56DE\u7684\u54CD\u5E94\u4E2D\u6CA1\u6709\u5177\u4F53\u7684\u5185\u5BB9\uFF0C\u7528\u4E8E\u83B7\u53D6\u62A5\u5934</td></tr><tr><td>3</td><td>POST</td><td>\u5411\u6307\u5B9A\u8D44\u6E90\u63D0\u4EA4\u6570\u636E\u8FDB\u884C\u5904\u7406\u8BF7\u6C42\uFF08\u4F8B\u5982\u63D0\u4EA4\u8868\u5355\u6216\u8005\u4E0A\u4F20\u6587\u4EF6\uFF09\u3002\u6570\u636E\u88AB\u5305\u542B\u5728\u8BF7\u6C42\u4F53\u4E2D\u3002POST \u8BF7\u6C42\u53EF\u80FD\u4F1A\u5BFC\u81F4\u65B0\u7684\u8D44\u6E90\u7684\u5EFA\u7ACB\u548C/\u6216\u5DF2\u6709\u8D44\u6E90\u7684\u4FEE\u6539\u3002</td></tr><tr><td>4</td><td>PUT</td><td>\u4ECE\u5BA2\u6237\u7AEF\u5411\u670D\u52A1\u5668\u4F20\u9001\u7684\u6570\u636E\u53D6\u4EE3\u6307\u5B9A\u7684\u6587\u6863\u7684\u5185\u5BB9\u3002</td></tr><tr><td>5</td><td>DELETE</td><td>\u8BF7\u6C42\u670D\u52A1\u5668\u5220\u9664\u6307\u5B9A\u7684\u9875\u9762\u3002</td></tr><tr><td>6</td><td>CONNECT</td><td>HTTP/1.1 \u534F\u8BAE\u4E2D\u9884\u7559\u7ED9\u80FD\u591F\u5C06\u8FDE\u63A5\u6539\u4E3A\u7BA1\u9053\u65B9\u5F0F\u7684\u4EE3\u7406\u670D\u52A1\u5668\u3002</td></tr><tr><td>7</td><td>OPTIONS</td><td>\u5141\u8BB8\u5BA2\u6237\u7AEF\u67E5\u770B\u670D\u52A1\u5668\u7684\u6027\u80FD\u3002</td></tr><tr><td>8</td><td>TRACE</td><td>\u56DE\u663E\u670D\u52A1\u5668\u6536\u5230\u7684\u8BF7\u6C42\uFF0C\u4E3B\u8981\u7528\u4E8E\u6D4B\u8BD5\u6216\u8BCA\u65AD\u3002</td></tr><tr><td>9</td><td>PATCH</td><td>\u662F\u5BF9 PUT \u65B9\u6CD5\u7684\u8865\u5145\uFF0C\u7528\u6765\u5BF9\u5DF2\u77E5\u8D44\u6E90\u8FDB\u884C\u5C40\u90E8\u66F4\u65B0 \u3002</td></tr></tbody></table><p><strong>GET\u8BF7\u6C42\u548CPOST\u8BF7\u6C42\u7684\u533A\u522B</strong></p><ol><li>GET \u8BF7\u6C42\u7684\u8BF7\u6C42\u53C2\u6570\u662F\u6DFB\u52A0\u5230 head \u4E2D\uFF0C\u53EF\u4EE5\u5728 url \u4E2D\u53EF\u4EE5\u770B\u5230\uFF1BPOST \u8BF7\u6C42\u7684\u8BF7\u6C42\u53C2\u6570\u662F\u6DFB\u52A0\u5230body\u4E2D\uFF0C\u5728url \u4E2D\u4E0D\u53EF\u89C1\u3002</li><li>\u8BF7\u6C42\u7684url\u6709\u957F\u5EA6\u9650\u5236\uFF0C\u8FD9\u4E2A\u9650\u5236\u7531\u6D4F\u89C8\u5668\u548C web \u670D\u52A1\u5668\u51B3\u5B9A\u548C\u8BBE\u7F6E\u7684\uFF0C\u4F8B\u5982IE\u6D4F\u89C8\u5668\u5BF9 URL\u7684\u6700\u5927\u9650\u5236\u4E3A2083\u4E2A\u5B57\u7B26\uFF0C\u5982\u679C\u8D85\u8FC7\u8FD9\u4E2A\u6570\u5B57\uFF0C\u63D0\u4EA4\u6309\u94AE\u6CA1\u6709\u4EFB\u4F55\u53CD\u5E94\uFF0C\u56E0\u4E3AGET\u8BF7\u6C42\u7684\u53C2\u6570\u662F\u6DFB\u52A0\u5230URL\u4E2D\uFF0C\u6240\u4EE5GET\u8BF7\u6C42\u7684URL\u7684\u957F\u5EA6\u9650\u5236\u9700\u8981\u5C06\u8BF7\u6C42\u53C2\u6570\u957F\u5EA6\u4E5F\u8003\u8651\u8FDB\u53BB\u3002\u800CPOST\u8BF7\u6C42\u4E0D\u7528\u8003\u8651\u8BF7\u6C42\u53C2\u6570\u7684\u957F\u5EA6\u3002</li><li>GET\u8BF7\u6C42\u4EA7\u751F\u4E00\u4E2A\u6570\u636E\u5305; POST\u8BF7\u6C42\u4EA7\u751F2\u4E2A\u6570\u636E\u5305\uFF0C\u5728\u706B\u72D0\u6D4F\u89C8\u5668\u4E2D\uFF0C\u4EA7\u751F\u4E00\u4E2A\u6570\u636E\u5305\uFF0C\u8FD9\u4E2A\u533A\u522B\u70B9\u5728\u4E8E\u6D4F\u89C8\u5668\u7684\u8BF7\u6C42\u673A\u5236\uFF0C\u5148\u53D1\u9001\u8BF7\u6C42\u5934\uFF0C\u518D\u53D1\u9001\u8BF7\u6C42\u4F53\uFF0C\u56E0\u4E3AGET\u6CA1\u6709\u8BF7\u6C42\u4F53\uFF0C\u6240\u4EE5\u5C31\u53D1\u9001\u4E00\u4E2A\u6570\u636E\u5305\uFF0C\u800CPOST\u5305\u542B\u8BF7\u6C42\u4F53\uFF0C\u6240\u4EE5\u53D1\u9001\u4E24\u6B21\u6570\u636E\u5305\uFF0C\u4F46\u662F\u7531\u4E8E\u706B\u72D0\u673A\u5236\u4E0D\u540C\uFF0C\u6240\u4EE5\u53D1\u9001\u4E00\u4E2A\u6570\u636E\u5305\u3002</li><li>GET \u8BF7\u6C42\u4F1A\u88AB\u6D4F\u89C8\u5668\u4E3B\u52A8\u7F13\u5B58\u4E0B\u6765\uFF0C\u7559\u4E0B\u5386\u53F2\u8BB0\u5F55\uFF0C\u800C POST \u9ED8\u8BA4\u4E0D\u4F1A\u3002</li><li>GET\u662F\u5E42\u7B49\u7684\uFF0C\u800CPOST\u4E0D\u662F(\u5E42\u7B49\u8868\u793A\u6267\u884C\u76F8\u540C\u7684\u64CD\u4F5C\uFF0C\u7ED3\u679C\u4E5F\u662F\u76F8\u540C\u7684)</li><li>GET\u662F\u83B7\u53D6\u6570\u636E\uFF0CPOST\u662F\u4FEE\u6539\u6570\u636E</li></ol><h3 id="\u72B6\u6001\u7801" tabindex="-1"><a class="header-anchor" href="#\u72B6\u6001\u7801" aria-hidden="true">#</a> \u72B6\u6001\u7801</h3><p><strong>\u72B6\u6001\u7801\u75313\u4F4D\u6570\u5B57\u7EC4\u6210\uFF0C\u7B2C\u4E00\u4F4D\u5B9A\u4E49\u54CD\u5E94\u7684\u7C7B\u522B</strong></p><p>1XX\uFF1A\u6307\u793A\u4FE1\u606F\uFF0C\u8868\u793A\u8BF7\u6C42\u4EE5\u63A5\u6536\uFF0C\u7EE7\u7EED\u5904\u7406</p><p>2XX\uFF1A\u6210\u529F\uFF0C\u8868\u793A\u8BF7\u6C42\u5DF2\u7ECF\u88AB\u6210\u529F\u63A5\u6536\u3001\u7406\u89E3\u3001\u63A5\u53D7</p><ul><li><p>200 OK \u662F\u6700\u5E38\u89C1\u7684\u6210\u529F\u72B6\u6001\u7801\uFF0C\u8868\u793A\u4E00\u5207\u6B63\u5E38\u3002\u5982\u679C\u662F\u975E HEAD \u8BF7\u6C42\uFF0C\u670D\u52A1\u5668\u8FD4\u56DE\u7684\u54CD\u5E94\u5934\u90FD\u4F1A\u6709 body \u6570\u636E\u3002</p></li><li><p>204 No Content \u4E5F\u662F\u5E38\u89C1\u7684\u6210\u529F\u72B6\u6001\u7801\uFF0C\u4E0E 200 OK \u57FA\u672C\u76F8\u540C\uFF0C\u4F46\u54CD\u5E94\u5934\u6CA1\u6709 body \u6570\u636E\u3002</p></li><li><p>206 Partial Content \u662F\u5E94\u7528\u4E8E HTTP \u5206\u5757\u4E0B\u8F7D\u6216\u65AD\u7535\u7EED\u4F20\uFF0C\u8868\u793A\u54CD\u5E94\u8FD4\u56DE\u7684 body \u6570\u636E\u5E76\u4E0D\u662F\u8D44\u6E90\u7684\u5168\u90E8\uFF0C\u800C\u662F\u5176\u4E2D\u7684\u4E00\u90E8\u5206\uFF0C\u4E5F\u662F\u670D\u52A1\u5668\u5904\u7406\u6210\u529F\u7684\u72B6\u6001\u3002</p></li></ul><p>3XX\uFF1A\u72B6\u6001\u7801\u8868\u793A\u5BA2\u6237\u7AEF\u8BF7\u6C42\u7684\u8D44\u6E90\u53D1\u9001\u4E86\u53D8\u52A8\uFF0C\u9700\u8981\u5BA2\u6237\u7AEF\u7528\u65B0\u7684 URL \u91CD\u65B0\u53D1\u9001\u8BF7\u6C42\u83B7\u53D6\u8D44\u6E90\uFF0C\u4E5F\u5C31\u662F<strong>\u91CD\u5B9A\u5411</strong>\u3002</p><ul><li>301 Moved Permanently \u8868\u793A\u6C38\u4E45\u91CD\u5B9A\u5411\uFF0C\u8BF4\u660E\u8BF7\u6C42\u7684\u8D44\u6E90\u5DF2\u7ECF\u4E0D\u5B58\u5728\u4E86\uFF0C\u9700\u6539\u7528\u65B0\u7684 URL \u518D\u6B21\u8BBF\u95EE\uFF0C\u641C\u7D22\u5F15\u64CE\u5728\u6293\u53D6\u65B0\u5185\u5BB9\u7684\u540C\u65F6\u4E5F\u5C06\u65E7\u7684\u7F51\u5740\u4EA4\u6362\u4E3A\u91CD\u5B9A\u5411\u4E4B\u540E\u7684\u7F51\u5740\u3002</li><li>302 Moved Permanently \u8868\u793A\u4E34\u65F6\u91CD\u5B9A\u5411\uFF0C\u8BF4\u660E\u8BF7\u6C42\u7684\u8D44\u6E90\u8FD8\u5728\uFF0C\u4F46\u6682\u65F6\u9700\u8981\u7528\u53E6\u4E00\u4E2A URL \u6765\u8BBF\u95EE\uFF0C\u641C\u7D22\u5F15\u64CE\u4F1A\u6293\u53D6\u65B0\u7684\u5185\u5BB9\u800C\u4FDD\u5B58\u65E7\u7684\u7F51\u5740\u3002</li></ul><p>301 \u548C 302 \u90FD\u4F1A\u5728\u54CD\u5E94\u5934\u91CC\u4F7F\u7528\u5B57\u6BB5 Location\uFF0C\u6307\u660E\u540E\u7EED\u8981\u8DF3\u8F6C\u7684 URL\uFF0C\u6D4F\u89C8\u5668\u4F1A\u81EA\u52A8\u91CD\u5B9A\u5411\u65B0\u7684 URL\u3002</p><ul><li>304 Not Modified\u4E0D\u5177\u6709\u8DF3\u8F6C\u7684\u542B\u4E49\uFF0C\u8868\u793A\u8D44\u6E90\u672A\u4FEE\u6539\uFF0C\u91CD\u5B9A\u5411\u5DF2\u5B58\u5728\u7684\u7F13\u51B2\u6587\u4EF6\uFF0C\u4E5F\u79F0\u7F13\u5B58\u91CD\u5B9A\u5411\uFF0C\u7528\u4E8E\u7F13\u5B58\u63A7\u5236\u3002</li></ul><p>4XX\uFF1A\u72B6\u6001\u7801\u8868\u793A\u5BA2\u6237\u7AEF\u53D1\u9001\u7684<strong>\u62A5\u6587\u6709\u8BEF</strong>\uFF0C\u670D\u52A1\u5668\u65E0\u6CD5\u5904\u7406\uFF0C\u4E5F\u5C31\u662F\u9519\u8BEF\u7801\u7684\u542B\u4E49\u3002</p><ul><li><p>400 Bad Request\u8868\u793A\u5BA2\u6237\u7AEF\u8BF7\u6C42\u7684\u62A5\u6587\u6709\u9519\u8BEF\u3002</p></li><li><p>401 Unauthorized\uFF1A\u7F3A\u5931\u6216\u9519\u8BEF\u7684\u8BA4\u8BC1\uFF0C\u8FD9\u4E2A\u72B6\u6001\u4EE3\u7801\u5FC5\u987B\u548CWWW-Authenticate\u62A5\u5934\u57DF\u4E00\u8D77\u4F7F\u7528\u3002</p></li><li><p>403 Forbidden\u8868\u793A\u670D\u52A1\u5668\u7981\u6B62\u8BBF\u95EE\u8D44\u6E90\uFF0C\u5E76\u4E0D\u662F\u5BA2\u6237\u7AEF\u7684\u8BF7\u6C42\u51FA\u9519\u3002</p></li><li><p>404 Not Found\u8868\u793A\u8BF7\u6C42\u7684\u8D44\u6E90\u5728\u670D\u52A1\u5668\u4E0A\u4E0D\u5B58\u5728\u6216\u672A\u627E\u5230\uFF0C\u6240\u4EE5\u65E0\u6CD5\u63D0\u4F9B\u7ED9\u5BA2\u6237\u7AEF\u3002</p></li></ul><p>5XX\uFF1A\u72B6\u6001\u7801\u8868\u793A\u5BA2\u6237\u7AEF\u8BF7\u6C42\u62A5\u6587\u6B63\u786E\uFF0C\u4F46\u662F<strong>\u670D\u52A1\u5668\u5904\u7406\u65F6\u5185\u90E8\u53D1\u751F\u4E86\u9519\u8BEF</strong>\uFF0C\u5C5E\u4E8E\u670D\u52A1\u5668\u7AEF\u7684\u9519\u8BEF\u7801\u3002</p><ul><li><p>501 Not Implemented \u8868\u793A\u5BA2\u6237\u7AEF\u8BF7\u6C42\u7684\u529F\u80FD\u8FD8\u4E0D\u652F\u6301\u3002</p></li><li><p>502 Bad Gateway \u901A\u5E38\u662F\u670D\u52A1\u5668\u4F5C\u4E3A\u7F51\u5173\u6216\u4EE3\u7406\u65F6\u8FD4\u56DE\u7684\u9519\u8BEF\u7801\uFF0C\u8868\u793A\u670D\u52A1\u5668\u81EA\u8EAB\u5DE5\u4F5C\u6B63\u5E38\uFF0C\u8BBF\u95EE\u540E\u7AEF\u670D\u52A1\u5668\u53D1\u751F\u4E86\u9519\u8BEF\u3002</p></li><li><p>503 Service Unavailable \u8868\u793A\u670D\u52A1\u5668\u5F53\u524D\u5F88\u5FD9\uFF0C\u6682\u65F6\u65E0\u6CD5\u54CD\u5E94\u670D\u52A1\u5668\u3002</p></li><li><p>504 Gateway Timeout\uFF1A\u7F51\u5173\u8D85\u65F6\uFF0C\u7531\u4F5C\u4E3A\u4EE3\u7406\u6216\u7F51\u5173\u7684\u670D\u52A1\u5668\u4F7F\u7528\uFF0C\u8868\u793A\u4E0D\u80FD\u53CA\u65F6\u5730\u4ECE\u8FDC\u7A0B\u670D\u52A1\u5668\u83B7\u5F97\u5E94\u7B54\u3002</p></li></ul><p><strong>301\u548C302\u7684\u533A\u522B</strong></p><p>301\u91CD\u5B9A\u5411\uFF0C\u6307\u9875\u9762\u6C38\u4E45\u6027\u8F6C\u79FB\uFF0C\u8868\u793A\u4E3A\u8D44\u6E90\u6216\u9875\u9762\u6C38\u4E45\u6027\u5730\u8F6C\u79FB\u5230\u4E86\u53E6\u4E00\u4E2A\u4F4D\u7F6E\u3002</p><p>301\u662FHTTP\u534F\u8BAE\u4E2D\u7684\u4E00\u79CD\u72B6\u6001\u7801\uFF0C\u5F53\u7528\u6237\u6216\u641C\u7D22\u5F15\u64CE\u5411\u670D\u52A1\u5668\u53D1\u51FA\u6D4F\u89C8\u8BF7\u6C42\u65F6\uFF0C\u670D\u52A1\u5668\u8FD4\u56DE\u7684HTTP\u6570\u636E\u6D41\u4E2D\u5934\u4FE1\u606F\u4E2D\u5305\u542B\u72B6\u6001\u7801 301 \uFF0C\u8868\u793A\u8BE5\u8D44\u6E90\u5DF2\u7ECF\u6C38\u4E45\u6539\u53D8\u4E86\u4F4D\u7F6E\u3002</p><p>302\u91CD\u5B9A\u5411\u662F\u9875\u9762\u6682\u65F6\u6027\u8F6C\u79FB\uFF0C\u641C\u7D22\u5F15\u64CE\u4F1A\u6293\u53D6\u65B0\u7684\u5185\u5BB9\u800C\u4FDD\u5B58\u65E7\u7684\u7F51\u5740\u5E76\u8BA4\u4E3A\u65B0\u7684\u7F51\u5740\u53EA\u662F\u6682\u65F6\u7684\u3002</p><h3 id="http1-1" tabindex="-1"><a class="header-anchor" href="#http1-1" aria-hidden="true">#</a> HTTP1.1</h3><p><strong>\u957F\u8FDE\u63A5</strong></p><p>HTTP 1.1\u652F\u6301\u957F\u8FDE\u63A5</p><p>HTTP 1.0\u89C4\u5B9A\u6D4F\u89C8\u5668\u4E0E\u670D\u52A1\u5668\u53EA\u4FDD\u6301\u77ED\u6682\u7684\u8FDE\u63A5\uFF0C\u6D4F\u89C8\u5668\u7684\u6BCF\u6B21\u8BF7\u6C42\u90FD\u9700\u8981\u4E0E\u670D\u52A1\u5668\u5EFA\u7ACB\u4E00\u4E2ATCP\u8FDE\u63A5\uFF0C\u670D\u52A1\u5668\u5B8C\u6210\u8BF7\u6C42\u5904\u7406\u540E\u7ACB\u5373\u65AD\u5F00TCP\u8FDE\u63A5\uFF0C\u670D\u52A1\u5668\u4E0D\u8DDF\u8E2A\u6BCF\u4E2A\u5BA2\u6237\u4E5F\u4E0D\u8BB0\u5F55\u8FC7\u53BB\u7684\u8BF7\u6C42\u3002</p><p>HTTP 1.1\u5219\u652F\u6301\u6301\u4E45\u8FDE\u63A5Persistent Connection\uFF0C\u5E76\u4E14\u9ED8\u8BA4\u4F7F\u7528\uFF0C\u5728\u540C\u4E00\u4E2ATCP\u7684\u8FDE\u63A5\u4E2D\u53EF\u4EE5\u4F20\u9001\u591A\u4E2AHTTP\u8BF7\u6C42\u548C\u54CD\u5E94\uFF0C\u591A\u4E2A\u8BF7\u6C42\u548C\u54CD\u5E94\u53EF\u4EE5\u91CD\u53E0\uFF0C\u591A\u4E2A\u8BF7\u6C42\u548C\u54CD\u5E94\u53EF\u4EE5\u540C\u65F6\u8FDB\u884C\uFF0C\u66F4\u52A0\u591A\u7684\u8BF7\u6C42\u5934\u548C\u54CD\u5E94\u5934</p><p>HTTP 1.1\u7684\u6301\u7EED\u8FDE\u63A5\uFF0C\u4E5F\u9700\u8981\u589E\u52A0\u65B0\u7684\u8BF7\u6C42\u5934\u6765\u5E2E\u52A9\u5B9E\u73B0\uFF0C\u4F8B\u5982\uFF0CConnection\u8BF7\u6C42\u5934\u7684\u503C\u4E3AKeep-Alive\u65F6\uFF0C\u5BA2\u6237\u7AEF\u901A\u77E5\u670D\u52A1\u5668\u8FD4\u56DE\u672C\u6B21\u8BF7\u6C42\u7ED3\u679C\u540E\u4FDD\u6301\u8FDE\u63A5\uFF1BConnection\u8BF7\u6C42\u5934\u7684\u503C\u4E3AClose\u65F6\uFF0C\u5BA2\u6237\u7AEF\u901A\u77E5\u670D\u52A1\u5668\u8FD4\u56DE\u672C\u6B21\u8BF7\u6C42\u7ED3\u679C\u540E\u5173\u95ED\u8FDE\u63A5\u3002</p><p><strong>\u7BA1\u9053\u7F51\u7EDC\u4F20\u8F93</strong></p><p>HTTP/1.1 \u91C7\u7528\u4E86\u957F\u8FDE\u63A5\u7684\u65B9\u5F0F\uFF0C\u8FD9\u4F7F\u5F97\u7BA1\u9053\u7F51\u7EDC\u4F20\u8F93\u6210\u4E3A\u4E86\u53EF\u80FD\u3002</p><p>\u5373\u53EF\u5728\u540C\u4E00\u4E2A TCP \u8FDE\u63A5\u91CC\u9762\uFF0C\u5BA2\u6237\u7AEF\u53EF\u4EE5\u53D1\u8D77\u591A\u4E2A\u8BF7\u6C42\uFF0C\u53EA\u8981\u7B2C\u4E00\u4E2A\u8BF7\u6C42\u53D1\u51FA\u53BB\u4E86\uFF0C\u4E0D\u5FC5\u7B49\u5176\u56DE\u6765\uFF0C\u5C31\u53EF\u4EE5\u53D1\u7B2C\u4E8C\u4E2A\u8BF7\u6C42\u51FA\u53BB\uFF0C\u53EF\u4EE5<strong>\u51CF\u5C11\u6574\u4F53\u7684\u54CD\u5E94\u65F6\u95F4\u3002</strong></p><p>\u4E3E\u4F8B\u6765\u8BF4\uFF0C\u5BA2\u6237\u7AEF\u9700\u8981\u8BF7\u6C42\u4E24\u4E2A\u8D44\u6E90\u3002\u4EE5\u524D\u7684\u505A\u6CD5\u662F\uFF0C\u5728\u540C\u4E00\u4E2ATCP\u8FDE\u63A5\u91CC\u9762\uFF0C\u5148\u53D1\u9001 A \u8BF7\u6C42\uFF0C\u7136\u540E\u7B49\u5F85\u670D\u52A1\u5668\u505A\u51FA\u56DE\u5E94\uFF0C\u6536\u5230\u540E\u518D\u53D1\u51FA B \u8BF7\u6C42\uFF0C\u7BA1\u9053\u673A\u5236\u5219\u662F\u5141\u8BB8\u6D4F\u89C8\u5668\u540C\u65F6\u53D1\u51FA A \u8BF7\u6C42\u548C B \u8BF7\u6C42\u3002</p><p>\u4F46\u662F\u670D\u52A1\u5668\u8FD8\u662F\u6309\u7167<strong>\u987A\u5E8F</strong>\uFF0C\u5148\u56DE\u5E94 A \u8BF7\u6C42\uFF0C\u5B8C\u6210\u540E\u518D\u56DE\u5E94 B \u8BF7\u6C42\uFF0C\u8981\u662F \u524D\u9762\u7684\u56DE\u5E94\u7279\u522B\u6162\uFF0C\u540E\u9762\u5C31\u4F1A\u6709\u8BB8\u591A\u8BF7\u6C42\u6392\u961F\u7B49\u7740\u3002</p><p><strong>Host\u5B57\u6BB5</strong></p><p>\u5728HTTP1.0\u4E2D\u8BA4\u4E3A\u6BCF\u53F0\u670D\u52A1\u5668\u90FD\u7ED1\u5B9A\u4E00\u4E2A\u552F\u4E00\u7684IP\u5730\u5740\uFF0C\u56E0\u6B64\uFF0C\u8BF7\u6C42\u6D88\u606F\u4E2D\u7684URL\u5E76\u6CA1\u6709\u4F20\u9012\u4E3B\u673A\u540D\uFF0C\u4F46\u968F\u7740\u865A\u62DF\u4E3B\u673A\u6280\u672F\u7684\u53D1\u5C55\uFF0C\u5728\u4E00\u53F0\u7269\u7406\u670D\u52A1\u5668\u4E0A\u53EF\u4EE5\u5B58\u5728\u591A\u4E2A\u865A\u62DF\u4E3B\u673A\uFF0C\u5E76\u4E14\u5B83\u4EEC\u5171\u4EAB\u4E00\u4E2AIP\u5730\u5740\u3002</p><p>HTTP1.1\u7684\u8BF7\u6C42\u6D88\u606F\u548C\u54CD\u5E94\u6D88\u606F\u90FD\u5E94\u652F\u6301Host\u5934\u57DF\uFF0C\u4E14\u8BF7\u6C42\u6D88\u606F\u4E2D\u5982\u679C\u6CA1\u6709Host\u5934\u57DF\u4F1A\u62A5\u544A\u4E00\u4E2A\u9519\u8BEF\uFF08400 Bad Request\uFF09\u3002</p><p>\u6B64\u5916\uFF0C\u670D\u52A1\u5668\u5E94\u8BE5\u63A5\u53D7\u4EE5\u7EDD\u5BF9\u8DEF\u5F84\u6807\u8BB0\u7684\u8D44\u6E90\u8BF7\u6C42\u3002</p><p><strong>100Status</strong></p><p>HTTP/1.1\u52A0\u5165\u4E86\u4E00\u4E2A\u65B0\u7684\u72B6\u6001\u7801100\u3002</p><p>\u5BA2\u6237\u7AEF\u4E8B\u5148\u53D1\u9001\u4E00\u4E2A\u53EA\u5E26\u5934\u57DF\u7684\u8BF7\u6C42\uFF0C\u5982\u679C\u670D\u52A1\u5668\u56E0\u4E3A\u6743\u9650\u62D2\u7EDD\u4E86\u8BF7\u6C42\uFF0C\u5C31\u56DE\u9001\u54CD\u5E94\u7801401\uFF08Unauthorized\uFF09\uFF1B</p><p>\u5982\u679C\u670D\u52A1\u5668\u63A5\u6536\u6B64\u8BF7\u6C42\u5C31\u56DE\u9001\u54CD\u5E94\u7801100\uFF0C\u5BA2\u6237\u7AEF\u5C31\u53EF\u4EE5\u7EE7\u7EED\u53D1\u9001\u5E26\u5B9E\u4F53\u7684\u5B8C\u6574\u8BF7\u6C42\u4E86\u3002</p><p>100\u72B6\u6001\u4EE3\u7801\u7684\u4F7F\u7528\uFF0C\u5141\u8BB8\u5BA2\u6237\u7AEF\u5728\u53D1request\u6D88\u606Fbody\u4E4B\u524D\u5148\u7528request header\u8BD5\u63A2\u4E00\u4E0Bserver\uFF0C\u770Bserver\u8981\u4E0D\u8981\u63A5\u6536request body\uFF0C\u518D\u51B3\u5B9A\u8981\u4E0D\u8981\u53D1request body\u3002</p><p><strong>Chunked Transfer Coding</strong></p><p>HTTP/1.1\u5C06\u53D1\u9001\u65B9\u5C06\u6D88\u606F\u5206\u5272\u6210\u82E5\u5E72\u4E2A\u4EFB\u610F\u5927\u5C0F\u7684\u6570\u636E\u5757\uFF0C\u6BCF\u4E2A\u6570\u636E\u5757\u5728\u53D1\u9001\u65F6\u90FD\u4F1A\u9644\u4E0A\u5757\u7684\u957F\u5EA6\uFF0C\u6700\u540E\u7528\u4E00\u4E2A\u96F6\u957F\u5EA6\u7684\u5757\u4F5C\u4E3A\u6D88\u606F\u7ED3\u675F\u7684\u6807\u5FD7\u3002</p><p>\u8FD9\u79CD\u65B9\u6CD5\u5141\u8BB8\u53D1\u9001\u65B9\u53EA\u7F13\u51B2\u6D88\u606F\u7684\u4E00\u4E2A\u7247\u6BB5\uFF0C\u907F\u514D\u7F13\u51B2\u6574\u4E2A\u6D88\u606F\u5E26\u6765\u7684\u8FC7\u8F7D\u3002</p><p><strong>Cache</strong></p><p>HTTP/1.1\u57281.0\u7684\u57FA\u7840\u4E0A\u52A0\u5165\u4E86\u4E00\u4E9BCache\u7684\u65B0\u7279\u6027\uFF0C\u5F53\u7F13\u5B58\u5BF9\u8C61\u7684Age\u8D85\u8FC7Expire\u65F6\u53D8\u4E3AStable\u5BF9\u8C61\uFF0CCache\u4E0D\u9700\u8981\u76F4\u63A5\u629B\u5F03Stable\u5BF9\u8C61\uFF0C\u800C\u662F\u4E0E\u6E90\u670D\u52A1\u5668\u8FDB\u884C\u91CD\u65B0\u6FC0\u6D3B\u3002</p><h3 id="http2-0" tabindex="-1"><a class="header-anchor" href="#http2-0" aria-hidden="true">#</a> HTTP2.0</h3><p><strong>HTTP2.0\u548CHTTP1.X\u76F8\u6BD4\u7684\u65B0\u7279\u6027</strong></p><ul><li><p>\u65B0\u7684\u4E8C\u8FDB\u5236\u683C\u5F0F\uFF0C<code>HTTP1.x</code>\u7684\u89E3\u6790\u662F\u57FA\u4E8E\u6587\u672C</p></li><li><p>\u591A\u8DEF\u590D\u7528\uFF0C\u5373\u8FDE\u63A5\u5171\u4EAB\uFF0C\u5373\u6BCF\u4E00\u4E2Arequest\u90FD\u662F\u662F\u7528\u4F5C\u8FDE\u63A5\u5171\u4EAB\u673A\u5236\u7684\uFF0C\u4E00\u4E2Arequest\u5BF9\u5E94\u4E00\u4E2Aid\uFF0C\u8FD9\u6837\u4E00\u4E2A\u8FDE\u63A5\u4E0A\u53EF\u4EE5\u6709\u591A\u4E2Arequest\uFF0C\u6BCF\u4E2A\u8FDE\u63A5\u7684request\u53EF\u4EE5\u968F\u673A\u7684\u6DF7\u6742\u5728\u4E00\u8D77\uFF0C\u63A5\u6536\u65B9\u53EF\u4EE5\u6839\u636Erequest\u7684 id\u5C06request\u518D\u5F52\u5C5E\u5230\u5404\u81EA\u4E0D\u540C\u7684\u670D\u52A1\u7AEF\u8BF7\u6C42\u91CC\u9762</p></li><li><p>header\u538B\u7F29\uFF0C<code>HTTP1.x</code>\u7684header\u5E26\u6709\u5927\u91CF\u4FE1\u606F\uFF0C\u800C\u4E14\u6BCF\u6B21\u90FD\u8981\u91CD\u590D\u53D1\u9001\uFF0CHTTP2.0\u4F7F\u7528encoder\u6765\u51CF\u5C11\u9700\u8981\u4F20\u8F93\u7684header\u5927\u5C0F\uFF0C\u901A\u8BAF\u53CC\u65B9\u5404\u81EAcache\u4E00\u4EFDheader fields\u8868\uFF0C\u65E2\u907F\u514D\u4E86\u91CD\u590Dheader\u7684\u4F20\u8F93\uFF0C\u53C8\u51CF\u5C0F\u4E86\u9700\u8981\u4F20\u8F93\u7684\u5927\u5C0F</p></li><li><p>\u670D\u52A1\u7AEF\u63A8\u9001</p></li></ul><p>HTTP/2 \u8FD8\u5728\u4E00\u5B9A\u7A0B\u5EA6\u4E0A\u6539\u5584\u4E86\u4F20\u7EDF\u7684\u8BF7\u6C42 - \u5E94\u7B54\u5DE5\u4F5C\u6A21\u5F0F\uFF0C\u670D\u52A1\u4E0D\u518D\u662F\u88AB\u52A8\u5730\u54CD\u5E94\uFF0C\u4E5F\u53EF\u4EE5<strong>\u4E3B\u52A8</strong>\u5411\u5BA2\u6237\u7AEF\u53D1\u9001\u6D88\u606F\u3002</p><p>\u4E3E\u4F8B\u6765\u8BF4\uFF0C\u5728\u6D4F\u89C8\u5668\u521A\u8BF7\u6C42 HTML \u7684\u65F6\u5019\uFF0C\u5C31\u63D0\u524D\u628A\u53EF\u80FD\u4F1A\u7528\u5230\u7684 JS\u3001CSS \u6587\u4EF6\u7B49\u9759\u6001\u8D44\u6E90\u4E3B\u52A8\u53D1\u7ED9\u5BA2\u6237\u7AEF\uFF0C<strong>\u51CF\u5C11\u5EF6\u65F6\u7684\u7B49\u5F85</strong>\uFF0C\u4E5F\u5C31\u662F\u670D\u52A1\u5668\u63A8\u9001\u3002</p><p><strong>\u6570\u636E\u6D41</strong></p><p>HTTP/2 \u7684\u6570\u636E\u5305\u4E0D\u662F\u6309\u987A\u5E8F\u53D1\u9001\u7684\uFF0C\u540C\u4E00\u4E2A\u8FDE\u63A5\u91CC\u9762\u8FDE\u7EED\u7684\u6570\u636E\u5305\uFF0C\u53EF\u80FD\u5C5E\u4E8E\u4E0D\u540C\u7684\u56DE\u5E94\u3002</p><p>\u56E0\u6B64\uFF0C\u5FC5\u987B\u8981\u5BF9\u6570\u636E\u5305\u505A\u6807\u8BB0\uFF0C\u6307\u51FA\u5B83\u5C5E\u4E8E\u54EA\u4E2A\u56DE\u5E94\u3002</p><p>\u6BCF\u4E2A\u8BF7\u6C42\u6216\u56DE\u5E94\u7684\u6240\u6709\u6570\u636E\u5305\uFF0C\u79F0\u4E3A\u4E00\u4E2A\u6570\u636E\u6D41\uFF08Stream\uFF09\u3002</p><p>\u6BCF\u4E2A\u6570\u636E\u6D41\u90FD\u6807\u8BB0\u7740\u4E00\u4E2A\u72EC\u4E00\u65E0\u4E8C\u7684\u7F16\u53F7\uFF0C\u5176\u4E2D\u89C4\u5B9A\u5BA2\u6237\u7AEF\u53D1\u51FA\u7684\u6570\u636E\u6D41\u7F16\u53F7\u4E3A\u5947\u6570\uFF0C \u670D\u52A1\u5668\u53D1\u51FA\u7684\u6570\u636E\u6D41\u7F16\u53F7\u4E3A\u5076\u6570</p><p>\u5BA2\u6237\u7AEF\u8FD8\u53EF\u4EE5<strong>\u6307\u5B9A\u6570\u636E\u6D41\u7684\u4F18\u5148\u7EA7</strong>\u3002\u4F18\u5148\u7EA7\u9AD8\u7684\u8BF7\u6C42\uFF0C\u670D\u52A1\u5668\u5C31\u5148\u54CD\u5E94\u8BE5\u8BF7\u6C42\u3002</p><p><strong>HTTP2.0\u7684\u591A\u8DEF\u590D\u7528\u548CHTTP1.X\u4E2D\u7684\u957F\u8FDE\u63A5\u590D\u7528\u6709\u4EC0\u4E48\u533A\u522B</strong></p><ul><li>HTTP/1.1\u7684Pipeling\u4E3A\u82E5\u5E72\u4E2A\u8BF7\u6C42\u6392\u961F\u4E32\u884C\u5316\u5355\u7EBF\u7A0B\u5904\u7406\uFF0C\u540E\u9762\u7684\u8BF7\u6C42\u7B49\u5F85\u524D\u9762\u8BF7\u6C42\u7684\u8FD4\u56DE\u624D\u80FD\u83B7\u5F97\u6267\u884C\u673A\u4F1A\uFF0C\u4E00\u65E6\u6709\u67D0\u8BF7\u6C42\u8D85\u65F6\u7B49\uFF0C\u540E\u7EED\u8BF7\u6C42\u53EA\u80FD\u88AB\u963B\u585E\uFF0C\u6BEB\u65E0\u529E\u6CD5\uFF1B</li><li>HTTP2.0\u591A\u4E2A\u8BF7\u6C42\u53EF\u540C\u65F6\u5728\u4E00\u4E2A\u8FDE\u63A5\u4E0A\u5E76\u884C\u6267\u884C\uFF0C\u67D0\u4E2A\u8BF7\u6C42\u4EFB\u52A1\u8017\u65F6\u4E25\u91CD\uFF0C\u4E0D\u4F1A\u5F71\u54CD\u5230\u5176\u5B83\u8FDE\u63A5\u7684\u6B63\u5E38\u6267\u884C</li></ul><h3 id="http3-0" tabindex="-1"><a class="header-anchor" href="#http3-0" aria-hidden="true">#</a> HTTP3.0</h3><p><strong>\u4F7F\u7528UDP\u534F\u8BAE</strong></p><p>HTTP/2 \u4E3B\u8981\u7684\u95EE\u9898\u5728\u4E8E\uFF1A\u591A\u4E2A HTTP \u8BF7\u6C42\u5728\u590D\u7528\u4E00\u4E2A TCP \u8FDE\u63A5\uFF0C\u4E0B\u5C42\u7684 TCP \u534F\u8BAE\u662F\u4E0D\u77E5\u9053\u6709\u591A\u5C11\u4E2A HTTP \u8BF7\u6C42\u7684\u3002</p><p>\u6240\u4EE5\u4E00\u65E6\u53D1\u751F\u4E86\u4E22\u5305\u73B0\u8C61\uFF0C\u5C31\u4F1A\u89E6\u53D1 TCP \u7684\u91CD\u4F20\u673A\u5236\uFF0C\u8FD9\u6837\u5728\u4E00\u4E2A TCP \u8FDE\u63A5\u4E2D\u7684<strong>\u6240\u6709\u7684 HTTP \u8BF7\u6C42\u90FD\u5FC5\u987B\u7B49\u5F85\u8FD9\u4E2A\u4E22\u4E86\u7684\u5305\u88AB\u91CD\u4F20\u56DE\u6765</strong>\u3002</p><ul><li>HTTP/1.1 \u4E2D\u7684\u7BA1\u9053\u4F20\u8F93\u4E2D\u5982\u679C\u6709\u4E00\u4E2A\u8BF7\u6C42\u963B\u585E\u4E86\uFF0C\u90A3\u4E48\u961F\u5217\u540E\u8BF7\u6C42\u4E5F\u7EDF\u7EDF\u88AB\u963B\u585E\u4F4F\u4E86</li><li>HTTP/2 \u591A\u8BF7\u6C42\u590D\u7528\u4E00\u4E2ATCP\u8FDE\u63A5\uFF0C\u4E00\u65E6\u53D1\u751F\u4E22\u5305\uFF0C\u5C31\u4F1A\u963B\u585E\u4F4F\u6240\u6709\u7684 HTTP \u8BF7\u6C42\u3002</li></ul><p>\u8FD9\u90FD\u662F\u57FA\u4E8E TCP \u4F20\u8F93\u5C42\u7684\u95EE\u9898\uFF0C\u6240\u4EE5 <strong>HTTP/3 \u628A HTTP \u4E0B\u5C42\u7684 TCP \u534F\u8BAE\u6539\u6210\u4E86 UDP\uFF01</strong></p><h3 id="https" tabindex="-1"><a class="header-anchor" href="#https" aria-hidden="true">#</a> HTTPS</h3><p><strong>HTTP\u4E0EHTTPS\u7684\u533A\u522B</strong></p><p>HTTP \u662F\u660E\u6587\u4F20\u8F93\u534F\u8BAE\uFF0CHTTPS \u534F\u8BAE\u662F\u7531 SSL+HTTP \u534F\u8BAE\u6784\u5EFA\u7684\u53EF\u8FDB\u884C\u52A0\u5BC6\u4F20\u8F93\u3001\u8EAB\u4EFD\u8BA4\u8BC1\u7684\u7F51\u7EDC\u534F\u8BAE\uFF0C\u6BD4 HTTP \u534F\u8BAE\u5B89\u5168</p><ul><li><p>HTTPS\u6BD4HTTP\u66F4\u52A0\u5B89\u5168\uFF0C\u5BF9\u641C\u7D22\u5F15\u64CE\u66F4\u53CB\u597D\uFF0C\u5229\u4E8ESEO\uFF0C\u8C37\u6B4C\u3001\u767E\u5EA6\u4F18\u5148\u7D22\u5F15HTTPS\u7F51\u9875</p></li><li><p>HTTPS\u9700\u8981\u7528\u5230SSL\u8BC1\u4E66\uFF0C\u800CHTTP\u4E0D\u7528</p></li><li><p>HTTPS\u6807\u51C6\u7AEF\u53E3443\uFF0CHTTP\u6807\u51C6\u7AEF\u53E380</p></li><li><p>HTTPS\u57FA\u4E8E\u4F20\u8F93\u5C42\uFF0CHTTP\u57FA\u4E8E\u5E94\u7528\u5C42</p></li><li><p>HTTPS\u5728\u6D4F\u89C8\u5668\u663E\u793A\u7EFF\u8272\u5B89\u5168\u9501\uFF0CHTTP\u6CA1\u6709\u663E\u793A</p></li></ul><p><strong>\u5DE5\u4F5C\u539F\u7406</strong></p><p>HTTPS \u534F\u8BAE\u4F1A\u5BF9\u4F20\u8F93\u7684\u6570\u636E\u8FDB\u884C\u52A0\u5BC6\uFF0C\u800C\u52A0\u5BC6\u8FC7\u7A0B\u662F\u4F7F\u7528\u4E86\u975E\u5BF9\u79F0\u52A0\u5BC6\u5B9E\u73B0</p><p>HTTPS\u7684\u6574\u4F53\u8FC7\u7A0B\u5206\u4E3A\u8BC1\u4E66\u9A8C\u8BC1\u548C\u6570\u636E\u4F20\u8F93\u9636\u6BB5\uFF0C\u5177\u4F53\u7684\u4EA4\u4E92\u8FC7\u7A0B\u5982\u4E0B\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-c1db0431-0eee-4c80-bb60-b7508a306864.png" alt=""></p><ul><li>Client\u53D1\u8D77\u4E00\u4E2AHTTPS\u7684\u8BF7\u6C42</li><li>Server\u628A\u4E8B\u5148\u914D\u7F6E\u597D\u7684\u516C\u94A5\u8BC1\u4E66\u8FD4\u56DE\u7ED9\u5BA2\u6237\u7AEF\u3002</li><li>Client\u9A8C\u8BC1\u516C\u94A5\u8BC1\u4E66\uFF1A\u6BD4\u5982\u662F\u5426\u5728\u6709\u6548\u671F\u5185\uFF0C\u8BC1\u4E66\u7684\u7528\u9014\u662F\u4E0D\u662F\u5339\u914DClient\u8BF7\u6C42\u7684\u7AD9\u70B9\uFF0C\u662F\u4E0D\u662F\u5728CRL\u540A\u9500\u5217\u8868\u91CC\u9762\uFF0C\u5B83\u7684\u4E0A\u4E00\u7EA7\u8BC1\u4E66\u662F\u5426\u6709\u6548\uFF0C\u8FD9\u662F\u4E00\u4E2A\u9012\u5F52\u7684\u8FC7\u7A0B\uFF0C\u76F4\u5230\u9A8C\u8BC1\u5230\u6839\u8BC1\u4E66\uFF08\u64CD\u4F5C\u7CFB\u7EDF\u5185\u7F6E\u7684Root\u8BC1\u4E66\u6216\u8005Client\u5185\u7F6E\u7684Root\u8BC1\u4E66\uFF09\uFF0C\u5982\u679C\u9A8C\u8BC1\u901A\u8FC7\u5219\u7EE7\u7EED\uFF0C\u4E0D\u901A\u8FC7\u5219\u663E\u793A\u8B66\u544A\u4FE1\u606F\u3002</li><li>Client\u4F7F\u7528\u4F2A\u968F\u673A\u6570\u751F\u6210\u5668\u751F\u6210\u52A0\u5BC6\u6240\u4F7F\u7528\u7684\u5BF9\u79F0\u5BC6\u94A5\uFF0C\u7136\u540E\u7528\u8BC1\u4E66\u7684\u516C\u94A5\u52A0\u5BC6\u8FD9\u4E2A\u5BF9\u79F0\u5BC6\u94A5\uFF0C\u53D1\u7ED9Server\u3002</li><li>Server\u4F7F\u7528\u81EA\u5DF1\u7684\u79C1\u94A5\u89E3\u5BC6\u8FD9\u4E2A\u6D88\u606F\uFF0C\u5F97\u5230\u5BF9\u79F0\u5BC6\u94A5\u3002\u81F3\u6B64\uFF0CClient\u548CServer\u53CC\u65B9\u90FD\u6301\u6709\u4E86\u76F8\u540C\u7684\u5BF9\u79F0\u5BC6\u94A5\u3002</li><li>Server\u4F7F\u7528\u5BF9\u79F0\u5BC6\u94A5\u52A0\u5BC6\u660E\u6587\u5185\u5BB9A\uFF0C\u53D1\u9001\u7ED9Client\u3002</li><li>Client\u4F7F\u7528\u5BF9\u79F0\u5BC6\u94A5\u89E3\u5BC6\u54CD\u5E94\u7684\u5BC6\u6587\uFF0C\u5F97\u5230\u660E\u6587\u5185\u5BB9A\u3002</li><li>Client\u518D\u6B21\u53D1\u8D77HTTPS\u7684\u8BF7\u6C42\uFF0C\u4F7F\u7528\u5BF9\u79F0\u5BC6\u94A5\u52A0\u5BC6\u8BF7\u6C42\u7684\u660E\u6587\u5185\u5BB9B\uFF0C\u7136\u540EServer\u4F7F\u7528\u5BF9\u79F0\u5BC6\u94A5\u89E3\u5BC6\u5BC6\u6587\uFF0C\u5F97\u5230\u660E\u6587\u5185\u5BB9B\u3002</li></ul><h4 id="\u6570\u5B57\u8BC1\u4E66" tabindex="-1"><a class="header-anchor" href="#\u6570\u5B57\u8BC1\u4E66" aria-hidden="true">#</a> \u6570\u5B57\u8BC1\u4E66</h4><p>\u5BA2\u6237\u7AEF\u5148\u5411\u670D\u52A1\u5668\u7AEF\u7D22\u8981\u516C\u94A5\uFF0C\u7136\u540E\u7528\u516C\u94A5\u52A0\u5BC6\u4FE1\u606F\uFF0C\u670D\u52A1\u5668\u6536\u5230\u5BC6\u6587\u540E\uFF0C\u7528\u81EA\u5DF1\u7684\u79C1\u94A5\u89E3\u5BC6\u3002</p><blockquote><p>\u8FD9\u5C31\u5B58\u5728\u4E9B\u95EE\u9898\uFF0C\u5982\u4F55\u4FDD\u8BC1\u516C\u94A5\u4E0D\u88AB\u7BE1\u6539\u548C\u4FE1\u4EFB\u5EA6\uFF1F</p></blockquote><p>\u6240\u4EE5\u8FD9\u91CC\u5C31\u9700\u8981\u501F\u52A9\u7B2C\u4E09\u65B9\u6743\u5A01\u673A\u6784 CA \uFF08\u6570\u5B57\u8BC1\u4E66\u8BA4\u8BC1\u673A\u6784\uFF09\uFF0C\u5C06<strong>\u670D\u52A1\u5668\u516C\u94A5\u653E\u5728\u6570\u5B57\u8BC1\u4E66</strong>\uFF08\u7531\u6570\u5B57\u8BC1\u4E66\u8BA4\u8BC1\u673A\u6784\u9881\u53D1\uFF09\u4E2D\uFF0C\u53EA\u8981\u8BC1\u4E66\u662F\u53EF\u4FE1\u7684\uFF0C\u516C\u94A5\u5C31\u662F\u53EF\u4FE1\u7684\u3002</p><p>\u901A\u8FC7\u6570\u5B57\u8BC1\u4E66\u7684\u65B9\u5F0F\u4FDD\u8BC1\u670D\u52A1\u5668\u516C\u94A5\u7684\u8EAB\u4EFD\uFF0C\u89E3\u51B3\u5192\u5145\u7684\u98CE\u9669\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-45917c49-bb08-4f88-84d2-5e8ae53acc7c.png" alt=""></p><h3 id="\u8BF7\u6C42\u62A5\u6587" tabindex="-1"><a class="header-anchor" href="#\u8BF7\u6C42\u62A5\u6587" aria-hidden="true">#</a> \u8BF7\u6C42\u62A5\u6587</h3><p><strong>\u8BF7\u6C42\u5934</strong></p><p>HTTP \u8BF7\u6C42\u62A5\u6587\u75313\u90E8\u5206\u7EC4\u6210(\u8BF7\u6C42\u884C+\u8BF7\u6C42\u5934+\u8BF7\u6C42\u4F53)</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-3c00598c-43c2-44cd-96c6-ee4d40b97abd.png" alt=""></p><p><strong>\u5E38\u89C1\u7684HTTP\u62A5\u6587\u5934\u5C5E\u6027</strong></p><ul><li>Accpet <ul><li>\u544A\u8BC9\u670D\u52A1\u7AEF\uFF0C\u5BA2\u6237\u7AEF\u63A5\u6536\u4EC0\u4E48\u7C7B\u578B\u7684\u54CD\u5E94</li></ul></li><li>Referer <ul><li>\u8868\u793A\u8FD9\u662F\u8BF7\u6C42\u662F\u4ECE\u54EA\u4E2AURL\u8FDB\u6765\u7684,\u6BD4\u5982\u60F3\u5728\u7F51\u4E0A\u8D2D\u7269\uFF0C\u4F46\u662F\u4E0D\u77E5\u9053\u9009\u62E9\u54EA\u5BB6\u7535\u5546\u5E73\u53F0\uFF0C\u4F60\u5C31\u53BB\u95EE\u5EA6\u5A18\uFF0C\u8BF4\u54EA\u5BB6\u7535\u5546\u7684\u4E1C\u897F\u4FBF\u5B9C\u554A\uFF0C\u7136\u540E\u4E00\u5806\u4E1C\u897F\u5F39\u51FA\u5728\u4F60\u9762\u524D\uFF0C\u7B2C\u4E00\u7ED9\u5C31\u662F\u67D0\u5B9D\uFF0C\u5F53\u4F60\u4ECE\u8FD9\u91CC\u8FDB\u5165\u67D0\u5B9D\u7684\u65F6\u5019\uFF0C\u8FD9\u4E2A\u8BF7\u6C42\u62A5\u6587\u7684Referer\u5C31\u662F\uFF1A<a href="www.baidu.com">www.baidu.com</a></li></ul></li><li>Cache-Control <ul><li>\u5BF9\u7F13\u5B58\u8FDB\u884C\u63A7\u5236\uFF0C\u5982\u4E00\u4E2A\u8BF7\u6C42\u5E0C\u671B\u54CD\u5E94\u7684\u5185\u5BB9\u5728\u5BA2\u6237\u7AEF\u7F13\u5B58\u4E00\u5E74\uFF0C\u6216\u4E0D\u88AB\u7F13\u53EF\u4EE5\u901A\u8FC7\u8FD9\u4E2A\u62A5\u6587\u5934\u8BBE\u7F6E</li></ul></li><li>Accept-Encoding <ul><li>\u8FD9\u4E2A\u5C5E\u6027\u662F\u7528\u6765\u544A\u8BC9\u670D\u52A1\u5668\u80FD\u63A5\u53D7\u4EC0\u4E48\u7F16\u7801\u683C\u5F0F\uFF0C\u5305\u62EC\u5B57\u7B26\u7F16\u7801,\u538B\u7F29\u5F62\u5F0F(\u4E00\u822C\u90FD\u662F\u538B\u7F29\u5F62\u5F0F) <ul><li>\u4F8B\u5982:<code>Accept-Encoding:gzip, deflate</code>(\u8FD9\u4E24\u79CD\u90FD\u662F\u538B\u7F29\u683C\u5F0F)</li></ul></li></ul></li><li>Host <ul><li>\u6307\u5B9A\u8981\u8BF7\u6C42\u7684\u8D44\u6E90\u6240\u5728\u7684\u4E3B\u673A\u548C\u7AEF\u53E3</li></ul></li><li>User-Agent\uFF1A\u544A\u8BC9\u670D\u52A1\u5668\uFF0C\u5BA2\u6237\u7AEF\u4F7F\u7528\u7684\u64CD\u4F5C\u7CFB\u7EDF\u3001\u6D4F\u89C8\u5668\u7248\u672C\u548C\u540D\u79F0</li><li>Connection</li></ul><p>\u51B3\u5B9A\u5F53\u524D\u4E8B\u52A1\uFF08\u4E09\u6B21\u63E1\u624B\u548C\u56DB\u6B21\u6325\u624B\uFF09\u5B8C\u6210\u540E\uFF0C\u662F\u5426\u5173\u95ED\u7F51\u7EDC\u8FDE\u63A5\u3002</p><ul><li>\u6301\u4E45\u8FDE\u63A5\uFF0C\u4E8B\u52A1\u5B8C\u6210\u540E\u4E0D\u5173\u95ED\u7F51\u7EDC\u8FDE\u63A5 \uFF1A<code> Connection: keep-alive</code></li></ul><ul><li>\u975E\u6301\u4E45\u8FDE\u63A5\uFF0C\u4E8B\u52A1\u5B8C\u6210\u540E\u5173\u95ED\u7F51\u7EDC\u8FDE\u63A5\uFF1A <code>Connection: close</code></li></ul><h3 id="\u54CD\u5E94\u62A5\u6587" tabindex="-1"><a class="header-anchor" href="#\u54CD\u5E94\u62A5\u6587" aria-hidden="true">#</a> \u54CD\u5E94\u62A5\u6587</h3><p>\u54CD\u5E94\u62A5\u6587\u4E0E\u8BF7\u6C42\u62A5\u6587\u4E00\u6837\uFF0C\u7531\u4E09\u4E2A\u90E8\u5206\u7EC4\u6210(\u54CD\u5E94\u884C,\u54CD\u5E94\u5934,\u54CD\u5E94\u4F53)</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-58884113-14dc-4cca-a63e-3320f31a4da5.png" alt=""></p><p><strong>HTTP\u54CD\u5E94\u62A5\u6587\u5C5E\u6027</strong></p><ul><li>Cache-Control <ul><li>\u54CD\u5E94\u8F93\u51FA\u5230\u5BA2\u6237\u7AEF\u540E\uFF0C\u670D\u52A1\u7AEF\u901A\u8FC7\u8BE5\u5C5E\u6027\u544A\u8BC9\u5BA2\u6237\u7AEF\u8BE5\u600E\u4E48\u63A7\u5236\u54CD\u5E94\u5185\u5BB9\u7684\u7F13\u5B58</li></ul></li><li>ETag <ul><li>\u8868\u793A\u4F60\u8BF7\u6C42\u8D44\u6E90\u7684\u7248\u672C\uFF0C\u5982\u679C\u8BE5\u8D44\u6E90\u53D1\u751F\u5566\u53D8\u5316\uFF0C\u90A3\u4E48\u8FD9\u4E2A\u5C5E\u6027\u4E5F\u4F1A\u8DDF\u7740\u53D8</li></ul></li><li>Location <ul><li>\u5728\u91CD\u5B9A\u5411\u4E2D\u6216\u8005\u521B\u5EFA\u65B0\u8D44\u6E90\u65F6\u4F7F\u7528</li></ul></li><li>Set-Cookie <ul><li>\u670D\u52A1\u7AEF\u53EF\u4EE5\u8BBE\u7F6E\u5BA2\u6237\u7AEF\u7684cookie</li></ul></li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><h2 id="tcp" tabindex="-1"><a class="header-anchor" href="#tcp" aria-hidden="true">#</a> TCP</h2><p>TCP\u662F\u4E00\u4E2A\u4F20\u8F93\u5C42\u534F\u8BAE\uFF0C\u63D0\u4F9B\u53EF\u9760\u4F20\u8F93\uFF0C\u652F\u6301\u5168\u53CC\u5DE5\uFF0C\u662F\u4E00\u4E2A\u8FDE\u63A5\u5BFC\u5411\u7684\u534F\u8BAE\u3002</p><p><strong>\u53CC\u5DE5/\u5355\u5DE5</strong></p><p>\u5728\u4EFB\u4F55\u4E00\u4E2A\u65F6\u523B\uFF0C\u5982\u679C\u6570\u636E\u53EA\u80FD\u5355\u5411\u53D1\u9001\uFF0C\u5C31\u662F\u5355\u5DE5\u3002</p><p>\u5982\u679C\u5728\u67D0\u4E2A\u65F6\u523B\u6570\u636E\u53EF\u4EE5\u5411\u4E00\u4E2A\u65B9\u5411\u4F20\u8F93\uFF0C\u4E5F\u53EF\u4EE5\u5411\u53E6\u4E00\u4E2A\u65B9\u5411\u53CD\u65B9\u5411\u4F20\u8F93\uFF0C\u800C\u4E14\u4EA4\u66FF\u8FDB\u884C\uFF0C\u53EB\u4F5C\u534A\u53CC\u5DE5\uFF1B\u534A\u53CC\u5DE5\u9700\u8981\u81F3\u5C11 1 \u6761\u7EBF\u8DEF\u3002</p><p>\u5982\u679C\u4EFB\u4F55\u65F6\u523B\u6570\u636E\u90FD\u53EF\u4EE5\u53CC\u5411\u6536\u53D1\uFF0C\u8FD9\u5C31\u662F\u5168\u53CC\u5DE5\uFF0C\u5168\u53CC\u5DE5\u9700\u8981\u5927\u4E8E 1 \u6761\u7EBF\u8DEF\u3002</p><p>TCP \u662F\u4E00\u4E2A\u53CC\u5DE5\u534F\u8BAE\uFF0C\u6570\u636E\u4EFB\u4F55\u65F6\u5019\u90FD\u53EF\u4EE5\u53CC\u5411\u4F20\u8F93\u3002</p><p>\u8FD9\u5C31\u610F\u5473\u7740\u5BA2\u6237\u7AEF\u548C\u670D\u52A1\u7AEF\u53EF\u4EE5\u5E73\u7B49\u5730\u53D1\u9001\u3001\u63A5\u6536\u4FE1\u606F\u3002</p><p><strong>TCP\u534F\u8BAE\u7684\u4E3B\u8981\u7279\u70B9</strong></p><ul><li><p>TCP\u662F\u9762\u5411\u8FDE\u63A5\u7684\u8FD0\u8F93\u5C42\u534F\u8BAE\uFF1B\u6240\u8C13\u9762\u5411\u8FDE\u63A5\u5C31\u662F\u53CC\u65B9\u4F20\u8F93\u6570\u636E\u4E4B\u524D\uFF0C\u5FC5\u987B\u5148\u5EFA\u7ACB\u4E00\u6761\u901A\u9053\uFF0C\u4F8B\u5982\u4E09\u6B21\u63E1\u624B\u5C31\u662F\u5EFA\u8BAE\u901A\u9053\u7684\u4E00\u4E2A\u8FC7\u7A0B\uFF0C\u800C\u56DB\u6B21\u6325\u624B\u5219\u662F\u7ED3\u675F\u9500\u6BC1\u901A\u9053\u7684\u4E00\u4E2A\u5176\u4E2D\u8FC7\u7A0B\u3002</p></li><li><p>\u6BCF\u4E00\u6761TCP\u8FDE\u63A5\u53EA\u80FD\u6709\u4E24\u4E2A\u7AEF\u70B9\uFF08\u5373\u4E24\u4E2A\u5957\u63A5\u5B57\uFF09\uFF0C\u53EA\u80FD\u662F\u70B9\u5BF9\u70B9\u7684\uFF1B</p></li><li><p>TCP\u63D0\u4F9B\u53EF\u9760\u7684\u4F20\u8F93\u670D\u52A1\u3002\u4F20\u9001\u7684\u6570\u636E\u65E0\u5DEE\u9519\u3001\u4E0D\u4E22\u5931\u3001\u4E0D\u91CD\u590D\u3001\u6309\u5E8F\u5230\u8FBE\uFF1B</p></li><li><p>TCP\u63D0\u4F9B\u5168\u53CC\u5DE5\u901A\u4FE1\u3002\u5141\u8BB8\u901A\u4FE1\u53CC\u65B9\u7684\u5E94\u7528\u8FDB\u7A0B\u5728\u4EFB\u4F55\u65F6\u5019\u90FD\u53EF\u4EE5\u53D1\u9001\u6570\u636E\uFF0C\u56E0\u4E3A\u4E24\u7AEF\u90FD\u8BBE\u6709\u53D1\u9001\u7F13\u5B58\u548C\u63A5\u53D7\u7F13\u5B58\uFF1B</p></li><li><p>\u9762\u5411\u5B57\u8282\u6D41\u3002\u867D\u7136\u5E94\u7528\u7A0B\u5E8F\u4E0ETCP\u4EA4\u4E92\u662F\u4E00\u6B21\u4E00\u4E2A\u5927\u5C0F\u4E0D\u7B49\u7684\u6570\u636E\u5757\uFF0C\u4F46TCP\u628A\u8FD9\u4E9B\u6570\u636E\u770B\u6210\u4E00\u8FDE\u4E32\u65E0\u7ED3\u6784\u7684\u5B57\u8282\u6D41\uFF0C\u5B83\u4E0D\u4FDD\u8BC1\u63A5\u6536\u65B9\u6536\u5230\u7684\u6570\u636E\u5757\u548C\u53D1\u9001\u65B9\u53D1\u9001\u7684\u6570\u636E\u5757\u5177\u6709\u5BF9\u5E94\u5927\u5C0F\u5173\u7CFB\uFF0C\u4F8B\u5982\uFF0C\u53D1\u9001\u65B9\u5E94\u7528\u7A0B\u5E8F\u4EA4\u7ED9\u53D1\u9001\u65B9\u7684TCP10\u4E2A\u6570\u636E\u5757\uFF0C\u63A5\u6536\u65B9\u7684TCP\u53EF\u80FD\u53EA\u7528\u6536\u5230\u76844\u4E2A\u6570\u636E\u5757\u5B57\u8282\u6D41\u4EA4\u4ED8\u7ED9\u4E0A\u5C42\u7684\u5E94\u7528\u7A0B\u5E8F</p></li></ul><p><strong>TCP\u7684\u53EF\u9760\u6027\u539F\u7406</strong></p><p>\u53EF\u9760\u4F20\u8F93\u6709\u5982\u4E0B\u4E24\u4E2A\u7279\u70B9:</p><ol><li>\u4F20\u8F93\u4FE1\u9053\u65E0\u5DEE\u9519,\u4FDD\u8BC1\u4F20\u8F93\u6570\u636E\u6B63\u786E;</li><li>\u4E0D\u7BA1\u53D1\u9001\u65B9\u4EE5\u591A\u5FEB\u7684\u901F\u5EA6\u53D1\u9001\u6570\u636E,\u63A5\u6536\u65B9\u603B\u662F\u6765\u5F97\u53CA\u5904\u7406\u6536\u5230\u7684\u6570\u636E;</li></ol><p>\u9996\u5148\uFF0C\u91C7\u7528\u4E09\u6B21\u63E1\u624B\u6765\u5EFA\u7ACBTCP\u8FDE\u63A5\uFF0C\u56DB\u6B21\u63E1\u624B\u6765\u91CA\u653ETCP\u8FDE\u63A5\uFF0C\u4ECE\u800C\u4FDD\u8BC1\u5EFA\u7ACB\u7684\u4F20\u8F93\u4FE1\u9053\u662F\u53EF\u9760\u7684\u3002</p><p>\u5176\u6B21\uFF0CTCP\u91C7\u7528\u4E86\u8FDE\u7EEDARQ\u534F\u8BAE\uFF08\u56DE\u9000N(Go-back-N)\uFF1B\u8D85\u65F6\u81EA\u52A8\u91CD\u4F20\uFF09\u6765\u4FDD\u8BC1\u6570\u636E\u4F20\u8F93\u7684\u6B63\u786E\u6027\uFF0C\u4F7F\u7528\u6ED1\u52A8\u7A97\u53E3\u534F\u8BAE\u6765\u4FDD\u8BC1\u63A5\u65B9\u80FD\u591F\u53CA\u65F6\u5904\u7406\u6240\u63A5\u6536\u5230\u7684\u6570\u636E\uFF0C\u8FDB\u884C\u6D41\u91CF\u63A7\u5236\u3002</p><p>\u6700\u540E\uFF0CTCP\u4F7F\u7528\u6162\u5F00\u59CB\u3001\u62E5\u585E\u907F\u514D\u3001\u5FEB\u91CD\u4F20\u548C\u5FEB\u6062\u590D\u6765\u8FDB\u884C\u62E5\u585E\u63A7\u5236\uFF0C\u907F\u514D\u7F51\u7EDC\u62E5\u585E\u3002</p><h3 id="\u62A5\u6587\u6BB5" tabindex="-1"><a class="header-anchor" href="#\u62A5\u6587\u6BB5" aria-hidden="true">#</a> \u62A5\u6587\u6BB5</h3><p>TCP\u867D\u9762\u5411\u5B57\u8282\u6D41\uFF0C\u4F46\u4F20\u9001\u7684\u6570\u636E\u5355\u5143\u4E3A\u62A5\u6587\u6BB5</p><p>\u62A5\u6587\u6BB5 = \u9996\u90E8 + \u6570\u636E2\u90E8\u5206</p><p>TCP\u7684\u5168\u90E8\u529F\u80FD\u4F53\u73B0\u5728\u5B83\u9996\u90E8\u4E2D\u5404\u5B57\u6BB5\u7684\u4F5C\u7528</p><blockquote><ol><li>\u9996\u90E8\u524D20\u4E2A\u5B57\u7B26\u56FA\u5B9A\u3001\u540E\u9762\u67094n\u4E2A\u5B57\u8282\u662F\u6839\u636E\u9700\u800C\u589E\u52A0\u7684\u9009\u9879</li><li>\u6545 TCP\u9996\u90E8\u6700\u5C0F\u957F\u5EA6 = 20\u5B57\u8282</li></ol></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-8011660d-24c8-460f-ac3d-b97ad9c99b13.png" alt=""></p><p><strong>\u7AEF\u53E3</strong>\uFF1A</p><p>\u6E90\u7AEF\u53E3\u53F7\u548C\u76EE\u5730\u7AEF\u53E3\u5404\u536016\u4F4D\u4E24\u4E2A\u5B57\u8282\uFF0C\u4E5F\u5C31\u662F\u7AEF\u53E3\u7684\u8303\u56F4\u662F<code>2^16=65535</code></p><p>\u53E6\u59161024\u4EE5\u4E0B\u662F\u7CFB\u7EDF\u4FDD\u7559\u7684\uFF0C\u4ECE1024-65535\u662F\u7528\u6237\u4F7F\u7528\u7684\u7AEF\u53E3\u8303\u56F4</p><p><strong>seq\u5E8F\u53F7</strong>\uFF1A\u53604\u5B57\u8282\uFF0CTCP\u8FDE\u63A5\u4E2D\u4F20\u9001\u7684\u5B57\u8282\u6D41\u4E2D\u7684\u6BCF\u4E2A\u5B57\u8282\u90FD\u6309\u987A\u5E8F\u7F16\u53F7\u3002</p><p>\u4F8B\u5982\uFF1A\u4E00\u6BB5\u62A5\u6587\u7684\u5E8F\u53F7\u5B57\u6BB5\u503C\u662F107\uFF0C\u643A\u5E26\u7684\u6570\u636E\u662F100\u4E2A\u5B57\u6BB5\uFF0C\u4E0B\u4E00\u4E2A\u62A5\u6587\u6BB5\u5E8F\u53F7\u4ECE107+100=207\u5F00\u59CB\u3002</p><p><strong>ack\u786E\u8BA4\u53F7</strong>\uFF1A4\u4E2A\u5B57\u8282\uFF0C\u662F\u671F\u671B\u6536\u5230\u5BF9\u65B9\u4E0B\u4E00\u4E2A\u62A5\u6587\u6BB5\u7684\u7B2C\u4E00\u4E2A\u6570\u636E\u5B57\u8282\u7684\u5E8F\u53F7\u3002</p><p>\u4F8B\u5982\uFF1AB\u6536\u5230A\u53D1\u9001\u7684\u62A5\u6587\uFF0C\u5176\u5E8F\u53F7\u5B57\u6BB5\u662F301\uFF0C\u6570\u636E\u957F\u5EA6\u662F200\u5B57\u8282\uFF0C\u8868\u660EB\u6B63\u786E\u6536\u5230A\u53D1\u9001\u7684\u5230\u5E8F\u53F7500\u4E3A\u6B62\u7684\u6570\u636E\uFF08301+200-1=500\uFF09\uFF0CB\u671F\u671B\u6536\u5230A\u4E0B\u4E00\u4E2A\u6570\u636E\u5E8F\u53F7\u662F501\uFF0CB\u53D1\u9001\u7ED9A\u7684\u786E\u8BA4\u62A5\u6587\u6BB5\u4E2D\u628Aack\u786E\u8BA4\u53F7\u7F6E\u4E3A501\u3002</p><p><strong>\u6570\u636E\u504F\u79FB</strong>\uFF1A\u5934\u90E8\u6709\u53EF\u9009\u5B57\u6BB5\uFF0C\u957F\u5EA6\u4E0D\u56FA\u5B9A\uFF0C\u6307\u51FATCP\u62A5\u6587\u6BB5\u7684\u6570\u636E\u8D77\u59CB\u5904\u8DDD\u79BB\u62A5\u6587\u6BB5\u7684\u8D77\u59CB\u5904\u6709\u591A\u8FDC\u3002</p><p><strong>\u4FDD\u7559</strong>\uFF1A\u4FDD\u7559\u4ECA\u540E\u4F7F\u7528\u7684\uFF0C\u88AB\u6807\u4E3A1\u3002</p><p><strong>\u63A7\u5236\u4F4D</strong>\uFF1A\u75318\u4E2A\u6807\u5FD7\u4F4D\u7EC4\u6210\u3002\u6BCF\u4E2A\u6807\u5FD7\u4F4D\u8868\u793A\u4E00\u4E2A\u63A7\u5236\u529F\u80FD\u3002</p><p>\u5176\u4E2D\u4E3B\u8981\u76846\u4E2A\uFF1A</p><ul><li><p><strong>URG\u7D27\u6025\u6307\u9488\u6807\u5FD7</strong>\uFF0C\u4E3A1\u8868\u793A\u7D27\u6025\u6307\u9488\u6709\u6548\uFF0C\u4E3A0\u5FFD\u7565\u7D27\u6025\u6307\u9488\u3002</p></li><li><p><strong>ACK\u786E\u8BA4\u5E8F\u53F7\u6807\u5FD7</strong>\uFF0C\u4E3A1\u8868\u793A\u786E\u8BA4\u53F7\u6709\u6548\uFF0C\u4E3A0\u8868\u793A\u62A5\u6587\u4E0D\u542B\u786E\u8BA4\u4FE1\u606F\uFF0C\u5FFD\u7565\u786E\u8BA4\u53F7\u5B57\u6BB5\uFF0C\u4E0A\u9762\u7684\u786E\u8BA4\u53F7\u662F\u5426\u6709\u6548\u5C31\u662F\u901A\u8FC7\u8BE5\u6807\u8BC6\u63A7\u5236\u7684\u3002</p></li><li><p><strong>PSH\u6807\u5FD7</strong>\uFF0C\u4E3A1\u8868\u793A\u5E26\u6709push\u6807\u5FD7\u7684\u6570\u636E\uFF0C\u6307\u793A\u63A5\u6536\u65B9\u5728\u63A5\u6536\u5230\u8BE5\u62A5\u6587\u6BB5\u4EE5\u540E\uFF0C\u5E94\u5C3D\u5FEB\u5C06\u8BE5\u62A5\u6587\u6BB5\u4EA4\u7ED9\u5E94\u7528\u7A0B\u5E8F\uFF0C\u800C\u4E0D\u662F\u5728\u7F13\u51B2\u533A\u6392\u961F\u3002</p></li><li><p><strong>RST\u91CD\u7F6E\u8FDE\u63A5\u6807\u5FD7</strong>\uFF0C\u91CD\u7F6E\u56E0\u4E3A\u4E3B\u673A\u5D29\u6E83\u6216\u5176\u4ED6\u539F\u56E0\u800C\u51FA\u73B0\u9519\u8BEF\u7684\u8FDE\u63A5\uFF0C\u6216\u7528\u4E8E\u62D2\u7EDD\u975E\u6CD5\u7684\u62A5\u6587\u6BB5\u6216\u975E\u6CD5\u7684\u8FDE\u63A5\u3002</p></li><li><p><strong>SYN\u540C\u6B65\u5E8F\u53F7</strong>\uFF0C\u540C\u6B65\u5E8F\u53F7\uFF0C\u7528\u4E8E\u5EFA\u7ACB\u8FDE\u63A5\u8FC7\u7A0B\uFF0C\u5728\u8FDE\u63A5\u8BF7\u6C42\u4E2D\uFF0CSYN=1\u548CACK=0\u8868\u793A\u8BE5\u6570\u636E\u6BB5\u6CA1\u6709\u4F7F\u7528\u634E\u5E26\u7684\u786E\u8BA4\u57DF\uFF0C\u800C\u8FDE\u63A5\u5E94\u7B54\u634E\u5E26\u4E00\u4E2A\u786E\u8BA4\uFF0C\u5373SYN=1\u548CACK=1\u3002\u3002</p></li><li><p><strong>FIN\u7EC8\u6B62\u6807\u5FD7</strong>\uFF0C\u7528\u4E8E\u91CA\u653E\u8FDE\u63A5\uFF0C\u4E3A1\u65F6\u8868\u793A\u53D1\u9001\u65B9\u6CA1\u6709\u53D1\u9001\u4E86\u3002</p></li></ul><p><strong>\u7A97\u53E3</strong>\uFF1A\u6ED1\u52A8\u7A97\u53E3\u5927\u5C0F\uFF0C\u7528\u6765\u544A\u77E5\u53D1\u9001\u7AEF\u63A5\u6536\u7AEF\u7F13\u5B58\u5927\u5C0F\uFF0C\u4EE5\u6B64\u63A7\u5236\u53D1\u9001\u7AEF\u53D1\u9001\u6570\u636E\u7684\u901F\u7387\uFF0C\u4ECE\u800C\u8FBE\u5230\u6D41\u91CF\u63A7\u5236\u3002</p><p><strong>\u6821\u9A8C\u548C</strong>\uFF1A\u5947\u5076\u6821\u9A8C\uFF0C\u6B64\u6821\u9A8C\u548C\u662F\u5BF9\u6574\u4E2A\u7684TCP\u62A5\u6587\u6BB5\uFF08\u5305\u62ECTCP\u5934\u90E8\u548CTCP\u6570\u636E\uFF09\uFF0C\u4EE516\u4F4D\u8FDB\u884C\u8BA1\u7B97\u6240\u5F97\uFF0C\u7531\u53D1\u9001\u7AEF\u8BA1\u7B97\u548C\u5B58\u50A8\uFF0C\u63A5\u6536\u7AEF\u8FDB\u884C\u9A8C\u8BC1\u3002</p><p><strong>\u7D27\u6025\u6307\u9488</strong>\uFF1A\u53EA\u6709\u63A7\u5236\u4F4D\u4E2D\u7684URG\u4E3A1\u65F6\u624D\u6709\u6548\uFF0C\u6307\u51FA\u672C\u62A5\u6587\u6BB5\u4E2D\u7684\u7D27\u6025\u6570\u636E\u7684\u5B57\u8282\u6570\u3002</p><p><strong>\u9009\u9879</strong>\uFF1A\u5176\u957F\u5EA6\u53EF\u53D8\uFF0C\u5B9A\u4E49\u5176\u4ED6\u7684\u53EF\u9009\u53C2\u6570\u3002</p><h3 id="\u7C98\u5305\u4E0E\u62C6\u5305" tabindex="-1"><a class="header-anchor" href="#\u7C98\u5305\u4E0E\u62C6\u5305" aria-hidden="true">#</a> \u7C98\u5305\u4E0E\u62C6\u5305</h3><p>TCP\u662F\u9762\u5411\u5B57\u8282\u6D41\u7684\u534F\u8BAE\uFF0C\u628A\u4E0A\u5C42\u5E94\u7528\u5C42\u7684\u6570\u636E\u770B\u6210\u5B57\u8282\u6D41\uFF0C\u6240\u4EE5\u5B83\u53D1\u9001\u7684\u4E0D\u662F\u56FA\u5B9A\u5927\u5C0F\u7684\u6570\u636E\u5305\uFF0CTCP\u534F\u8BAE\u4E5F\u6CA1\u6709\u5B57\u6BB5\u8BF4\u660E\u53D1\u9001\u6570\u636E\u5305\u7684\u5927\u5C0F\u3002</p><p>\u800C\u4E14TCP\u4E0D\u4FDD\u8BC1\u63A5\u53D7\u65B9\u5E94\u7528\u7A0B\u5E8F\u6536\u5230\u7684\u6570\u636E\u5757\u548C\u53D1\u9001\u5E94\u7528\u7A0B\u5E8F\u53D1\u9001\u7684\u6570\u636E\u5757\u5177\u6709\u5BF9\u5E94\u7684\u5927\u5C0F\u5173\u7CFB</p><p>\u6BD4\u5982\u53D1\u9001\u65B9\u5E94\u7528\u7A0B\u5E8F\u4EA4\u7ED9\u53D1\u9001\u65B9<code>TCP</code> 10\u4E2A\u6570\u636E\u5757\uFF0C\u63A5\u53D7\u65B9TCP\u53EF\u80FD\u53EA\u7528\u4E864\u4E2A\u6570\u636E\u5757\u5C31\u5B8C\u6574\u7684\u628A\u63A5\u53D7\u5230\u7684\u5B57\u8282\u6D41\u4EA4\u7ED9\u4E86\u4E0A\u5C42\u5E94\u7528\u7A0B\u5E8F\u3002</p><p>TCP\u5E95\u5C42\u5E76\u4E0D\u4E86\u89E3\u4E0A\u5C42\u4E1A\u52A1\u6570\u636E\u7684\u5177\u4F53\u542B\u4E49\uFF0C\u5B83\u4F1A\u6839\u636ETCP\u7F13\u51B2\u533A\u7684\u5B9E\u9645\u60C5\u51B5\u8FDB\u884C\u5305\u7684\u5212\u5206\uFF0C\u6240\u4EE5\u5728\u4E1A\u52A1\u4E0A\u8BA4\u4E3A\uFF0C\u4E00\u4E2A\u5B8C\u6574\u7684\u5305\u53EF\u80FD\u4F1A\u88ABTCP\u62C6\u5206\u6210\u591A\u4E2A\u5305\u8FDB\u884C\u53D1\u9001\uFF0C\u4E5F\u6709\u53EF\u80FD\u628A\u591A\u4E2A\u5C0F\u7684\u5305\u5C01\u88C5\u6210\u4E00\u4E2A\u5927\u7684\u6570\u636E\u5305\u53D1\u9001\uFF0C\u8FD9\u5C31\u662F\u6240\u8C13\u7684TCP\u7C98\u5305\u548C\u62C6\u5305\u95EE\u9898</p><p><strong>TCP\u7C98\u5305/\u62C6\u5305\u89E3\u51B3\u7B56\u7565</strong></p><p>\u7531\u4E8ETCP\u65E0\u6CD5\u7406\u89E3\u4E0A\u4E00\u5C42\u7684\u4E1A\u52A1\u6570\u636E\u7279\u70B9\uFF0C\u6240\u4EE5TCP\u662F\u65E0\u6CD5\u4FDD\u8BC1\u53D1\u9001\u7684\u6570\u636E\u5305\u4E0D\u53D1\u751F\u7C98\u5305\u548C\u62C6\u5305\uFF0C\u8FD9\u4E2A\u95EE\u9898\u53EA\u80FD\u901A\u8FC7\u4E0A\u5C42\u7684\u534F\u8BAE\u6808\u8BBE\u8BA1\u6765\u89E3\u51B3\uFF0C\u89E3\u51B3\u601D\u8DEF\u6709\u4E00\u4E0B\u51E0\u79CD\uFF1A</p><ul><li><p>\u6D88\u606F\u5B9A\u957F\uFF1A\u6BCF\u4E2A\u53D1\u9001\u7684\u6570\u636E\u5305\u5927\u5C0F\u56FA\u5B9A\uFF0C\u6BD4\u5982100\u5B57\u8282\uFF0C\u4E0D\u8DB3100\u5B57\u8282\u7684\u7528\u7A7A\u683C\u8865\u5145\uFF0C\u63A5\u53D7\u65B9\u53D6\u6570\u636E\u7684\u65F6\u5019\u6839\u636E\u8FD9\u4E2A\u957F\u5EA6\u6765\u8BFB\u53D6\u6570\u636E</p></li><li><p>\u6D88\u606F\u672B\u5C3E\u589E\u52A0\u6362\u884C\u7B26\u6765\u8868\u793A\u4E00\u6761\u5B8C\u6574\u7684\u6D88\u606F\uFF1A\u63A5\u6536\u65B9\u8BFB\u53D6\u7684\u65F6\u5019\u6839\u636E\u6362\u884C\u7B26\u6765\u5224\u65AD\u662F\u5426\u662F\u4E00\u6761\u5B8C\u6574\u7684\u6D88\u606F\uFF0C\u5982\u679C\u6D88\u606F\u7684\u5185\u5BB9\u4E5F\u5305\u542B\u6362\u884C\u7B26\uFF0C\u90A3\u4E48\u8FD9\u79CD\u65B9\u5F0F\u5C31\u4E0D\u5408\u9002\u4E86\u3002</p></li><li><p>\u5C06\u6D88\u606F\u5206\u4E3A\u6D88\u606F\u5934\u548C\u6D88\u606F\u5C3E\u4E24\u90E8\u5206\uFF0C\u6D88\u606F\u5934\u6307\u5B9A\u6570\u636E\u957F\u5EA6\uFF0C\u6839\u636E\u6D88\u606F\u957F\u5EA6\u6765\u8BFB\u53D6\u5B8C\u6574\u7684\u6D88\u606F\uFF0C\u4F8B\u5982UDP\u534F\u8BAE\u662F\u8FD9\u4E48\u8BBE\u8BA1\u7684\uFF0C\u7528\u4E24\u4E2A\u5B57\u8282\u6765\u8868\u793A\u6D88\u606F\u957F\u5EA6\uFF0C\u6240\u4EE5UDP\u4E0D\u5B58\u5728\u7C98\u5305\u548C\u62C6\u5305\u95EE\u9898\u3002</p></li></ul><h3 id="\u4E09\u6B21\u63E1\u624B" tabindex="-1"><a class="header-anchor" href="#\u4E09\u6B21\u63E1\u624B" aria-hidden="true">#</a> \u4E09\u6B21\u63E1\u624B</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-f6a9438e-4eb8-4573-9ef5-30e07b8c31df.png" alt=""></p><p><strong>\u7B2C\u4E00\u6B21\u63E1\u624B</strong>\uFF1A</p><p>\u5BA2\u6237\u7AEF\u5C06TCP\u62A5\u6587\u6807\u5FD7\u4F4D<code>SYN</code>\u7F6E\u4E3A1\uFF0C\u968F\u673A\u4EA7\u751F\u4E00\u4E2A\u5E8F\u53F7\u503C<code>seq=J</code>\uFF0C\u4FDD\u5B58\u5728TCP\u9996\u90E8\u7684\u5E8F\u5217\u53F7\u5B57\u6BB5\u91CC\uFF0C\u6307\u660E\u5BA2\u6237\u7AEF\u6253\u7B97\u8FDE\u63A5\u7684\u670D\u52A1\u5668\u7684\u7AEF\u53E3\uFF0C\u5E76\u5C06\u8BE5\u6570\u636E\u5305\u53D1\u9001\u7ED9\u670D\u52A1\u5668\u7AEF\uFF0C\u53D1\u9001\u5B8C\u6BD5\u540E\uFF0C\u5BA2\u6237\u7AEF\u8FDB\u5165<code>SYN_SENT</code>\u72B6\u6001\uFF0C\u7B49\u5F85\u670D\u52A1\u5668\u7AEF\u786E\u8BA4\u3002</p><p><strong>\u7B2C\u4E8C\u6B21\u63E1\u624B</strong>\uFF1A</p><p>\u670D\u52A1\u5668\u7AEF\u6536\u5230\u6570\u636E\u5305\u540E\u7531\u6807\u5FD7\u4F4D<code>SYN=1</code>\u77E5\u9053\u5BA2\u6237\u7AEF\u8BF7\u6C42\u5EFA\u7ACB\u8FDE\u63A5\uFF0C\u670D\u52A1\u5668\u7AEF\u5C06TCP\u62A5\u6587\u6807\u5FD7\u4F4DSYN\u548CACK\u90FD\u7F6E\u4E3A1\uFF0C<code>ack=J+1</code>\uFF0C\u968F\u673A\u4EA7\u751F\u4E00\u4E2A\u5E8F\u53F7\u503C<code>seq=K</code>\uFF0C\u5E76\u5C06\u8BE5\u6570\u636E\u5305\u53D1\u9001\u7ED9\u5BA2\u6237\u7AEF\u4EE5\u786E\u8BA4\u8FDE\u63A5\u8BF7\u6C42\uFF0C\u670D\u52A1\u5668\u7AEF\u8FDB\u5165<code>SYN_RCVD</code>\u72B6\u6001\u3002</p><p><strong>\u7B2C\u4E09\u6B21\u63E1\u624B</strong>\uFF1A</p><p>\u5BA2\u6237\u7AEF\u6536\u5230\u786E\u8BA4\u540E\uFF0C\u68C0\u67E5ack\u662F\u5426\u4E3A<code>J+1</code>\uFF0CACK\u662F\u5426\u4E3A1\uFF0C\u5982\u679C\u6B63\u786E\u5219\u5C06\u6807\u5FD7\u4F4DACK\u7F6E\u4E3A1\uFF0C<code>ack=K+1</code>\uFF0C\u5E76\u5C06\u8BE5\u6570\u636E\u5305\u53D1\u9001\u7ED9\u670D\u52A1\u5668\u7AEF\uFF0C\u670D\u52A1\u5668\u7AEF\u68C0\u67E5ack\u662F\u5426\u4E3A<code>K+1</code>\uFF0CACK\u662F\u5426\u4E3A1\uFF0C\u5982\u679C\u6B63\u786E\u5219\u8FDE\u63A5\u5EFA\u7ACB\u6210\u529F\uFF0C\u5BA2\u6237\u7AEF\u548C\u670D\u52A1\u5668\u7AEF\u8FDB\u5165<code>ESTABLISHED</code>\u72B6\u6001\uFF0C\u5B8C\u6210\u4E09\u6B21\u63E1\u624B\uFF0C\u968F\u540E\u5BA2\u6237\u7AEF\u4E0E\u670D\u52A1\u5668\u7AEF\u4E4B\u95F4\u53EF\u4EE5\u5F00\u59CB\u4F20\u8F93\u6570\u636E\u4E86\u3002</p><p><strong>\u4E0A\u9762\u5199\u7684ack\u548CACK\uFF0C\u4E0D\u662F\u540C\u4E00\u4E2A\u6982\u5FF5\uFF1A</strong></p><ul><li><p>\u5C0F\u5199\u7684ack\u4EE3\u8868\u7684\u662F\u5934\u90E8\u7684\u786E\u8BA4\u53F7Acknowledge number\uFF0C \u7F29\u5199ack\uFF0C\u662F\u5BF9\u4E0A\u4E00\u4E2A\u5305\u7684\u5E8F\u53F7\u8FDB\u884C\u786E\u8BA4\u7684\u53F7\uFF0C<code>ack=seq+1</code>\u3002</p></li><li><p>\u5927\u5199\u7684ACK\uFF0C\u5219\u662F\u6211\u4EEC\u4E0A\u9762\u8BF4\u7684TCP\u9996\u90E8\u7684\u6807\u5FD7\u4F4D\uFF0C\u7528\u4E8E\u6807\u5FD7\u7684TCP\u5305\u662F\u5426\u5BF9\u4E0A\u4E00\u4E2A\u5305\u8FDB\u884C\u4E86\u786E\u8BA4\u64CD\u4F5C\uFF0C\u5982\u679C\u786E\u8BA4\u4E86\uFF0C\u5219\u628AACK\u6807\u5FD7\u4F4D\u8BBE\u7F6E\u62101\u3002</p></li></ul><p><strong>TCP\u4E3A\u4EC0\u4E48\u4E09\u6B21\u63E1\u624B\u800C\u4E0D\u662F\u4E24\u6B21\u63E1\u624B</strong></p><ul><li><p>\u4E3A\u4E86\u5B9E\u73B0\u53EF\u9760\u6570\u636E\u4F20\u8F93\uFF0C TCP \u534F\u8BAE\u7684\u901A\u4FE1\u53CC\u65B9\uFF0C \u90FD\u5FC5\u987B\u7EF4\u62A4\u4E00\u4E2A\u5E8F\u5217\u53F7\uFF0C \u4EE5\u6807\u8BC6\u53D1\u9001\u51FA\u53BB\u7684\u6570\u636E\u5305\u4E2D\uFF0C \u54EA\u4E9B\u662F\u5DF2\u7ECF\u88AB\u5BF9\u65B9\u6536\u5230\u7684\u3002 \u4E09\u6B21\u63E1\u624B\u7684\u8FC7\u7A0B\u5373\u662F\u901A\u4FE1\u53CC\u65B9\u76F8\u4E92\u544A\u77E5\u5E8F\u5217\u53F7\u8D77\u59CB\u503C\uFF0C \u5E76\u786E\u8BA4\u5BF9\u65B9\u5DF2\u7ECF\u6536\u5230\u4E86\u5E8F\u5217\u53F7\u8D77\u59CB\u503C\u7684\u5FC5\u7ECF\u6B65\u9AA4</p></li><li><p>\u5982\u679C\u53EA\u662F\u4E24\u6B21\u63E1\u624B\uFF0C \u81F3\u591A\u53EA\u6709\u8FDE\u63A5\u53D1\u8D77\u65B9\u7684\u8D77\u59CB\u5E8F\u5217\u53F7\u80FD\u88AB\u786E\u8BA4\uFF0C \u53E6\u4E00\u65B9\u9009\u62E9\u7684\u5E8F\u5217\u53F7\u5219\u5F97\u4E0D\u5230\u786E\u8BA4</p></li></ul><p><strong>\u300A\u8BA1\u7B97\u673A\u7F51\u7EDC\u300B\u4E2D\u662F\u8FD9\u6837\u8BF4\u7684\uFF1A</strong></p><p>\u4E3A\u4E86\u9632\u6B62\u5DF2\u5931\u6548\u7684\u8FDE\u63A5\u8BF7\u6C42\u62A5\u6587\u6BB5\u7A81\u7136\u53C8\u4F20\u9001\u5230\u4E86\u670D\u52A1\u7AEF\uFF0C\u56E0\u800C\u4EA7\u751F\u9519\u8BEF\u3002</p><blockquote><p>\u5728\u4E66\u4E2D\u540C\u65F6\u4E3E\u4E86\u4E00\u4E2A\u4F8B\u5B50\uFF0C\u5982\u4E0B\uFF1A</p></blockquote><p>\u5047\u5982<code>client</code>\u53D1\u51FA\u7684\u7B2C\u4E00\u4E2A\u8FDE\u63A5\u8BF7\u6C42\u62A5\u6587\u6BB5\u5E76\u6CA1\u6709\u4E22\u5931\uFF0C\u800C\u662F\u5728\u67D0\u4E2A\u7F51\u7EDC\u7ED3\u70B9\u957F\u65F6\u95F4\u7684\u6EDE\u7559\u4E86\uFF0C\u4EE5\u81F4\u5EF6\u8BEF\u5230\u8FDE\u63A5\u91CA\u653E\u4EE5\u540E\u7684\u67D0\u4E2A\u65F6\u95F4\u624D\u5230\u8FBE<code>server</code>\uFF0C\u672C\u6765\u8FD9\u662F\u4E00\u4E2A\u65E9\u5DF2\u5931\u6548\u7684\u62A5\u6587\u6BB5\uFF0C\u4F46<code>server</code>\u6536\u5230\u6B64\u5931\u6548\u7684\u8FDE\u63A5\u8BF7\u6C42\u62A5\u6587\u6BB5\u540E\uFF0C\u5C31\u8BEF\u8BA4\u4E3A\u662Fclient\u518D\u6B21\u53D1\u51FA\u7684\u4E00\u4E2A\u65B0\u7684\u8FDE\u63A5\u8BF7\u6C42\u3002</p><p>\u4E8E\u662F\u5C31\u5411client\u53D1\u51FA\u786E\u8BA4\u62A5\u6587\u6BB5\uFF0C\u540C\u610F\u5EFA\u7ACB\u8FDE\u63A5\uFF0C\u5047\u8BBE\u4E0D\u91C7\u7528<strong>\u4E09\u6B21\u63E1\u624B</strong>\uFF0C\u90A3\u4E48\u53EA\u8981server\u53D1\u51FA\u786E\u8BA4\uFF0C\u65B0\u7684\u8FDE\u63A5\u5C31\u5EFA\u7ACB\u4E86\uFF0C\u7531\u4E8E\u73B0\u5728client\u5E76\u6CA1\u6709\u53D1\u51FA\u5EFA\u7ACB\u8FDE\u63A5\u7684\u8BF7\u6C42\uFF0C\u56E0\u6B64\u4E0D\u4F1A\u7406\u776Cserver\u7684\u786E\u8BA4\uFF0C\u4E5F\u4E0D\u4F1A\u5411server\u53D1\u9001\u6570\u636E\u3002</p><p>\u4F46server\u5374\u4EE5\u4E3A\u65B0\u7684\u8FDE\u63A5\u5DF2\u7ECF\u5EFA\u7ACB\uFF0C\u5E76\u4E00\u76F4\u7B49\u5F85<code>client</code>\u53D1\u6765\u6570\u636E\uFF0C\u8FD9\u6837\uFF0Cserver\u7684\u5F88\u591A\u8D44\u6E90\u5C31\u767D\u767D\u6D6A\u8D39\u6389\u4E86\u3002</p><p>\u91C7\u7528<strong>\u4E09\u6B21\u63E1\u624B</strong>\u7684\u529E\u6CD5\u53EF\u4EE5\u9632\u6B62\u4E0A\u8FF0\u73B0\u8C61\u53D1\u751F\uFF0C\u4F8B\u5982\u521A\u624D\u90A3\u79CD\u60C5\u51B5\uFF0Cclient\u4E0D\u4F1A\u5411<code>server</code>\u7684\u786E\u8BA4\u53D1\u51FA\u786E\u8BA4\uFF0Cserver\u7531\u4E8E\u6536\u4E0D\u5230\u786E\u8BA4\uFF0C\u5C31\u77E5\u9053client\u5E76\u6CA1\u6709\u8981\u6C42\u5EFA\u7ACB\u8FDE\u63A5\u3002</p><p><strong>\u4EC0\u4E48\u662F\u534A\u8FDE\u63A5\u961F\u5217</strong></p><p>\u670D\u52A1\u5668\u7B2C\u4E00\u6B21\u6536\u5230\u5BA2\u6237\u7AEF\u7684 SYN \u4E4B\u540E\uFF0C\u5C31\u4F1A\u5904\u4E8E <code>SYN_RCVD</code>\u72B6\u6001\uFF0C\u6B64\u65F6\u53CC\u65B9\u8FD8\u6CA1\u6709\u5B8C\u5168\u5EFA\u7ACB\u5176\u8FDE\u63A5\uFF0C\u670D\u52A1\u5668\u4F1A\u628A\u6B64\u79CD\u72B6\u6001\u4E0B\u8BF7\u6C42\u8FDE\u63A5\u653E\u5728\u4E00\u4E2A\u961F\u5217\u91CC\uFF0C\u6211\u4EEC\u628A\u8FD9\u79CD\u961F\u5217\u79F0\u4E4B\u4E3A<strong>\u534A\u8FDE\u63A5\u961F\u5217</strong>\u3002</p><p>\u5F53\u7136\u8FD8\u6709\u4E00\u4E2A<strong>\u5168\u8FDE\u63A5\u961F\u5217</strong>\uFF0C\u5C31\u662F\u5DF2\u7ECF\u5B8C\u6210\u4E09\u6B21\u63E1\u624B\uFF0C\u5EFA\u7ACB\u8D77\u8FDE\u63A5\u7684\u5C31\u4F1A\u653E\u5728\u5168\u8FDE\u63A5\u961F\u5217\u4E2D\u3002\u5982\u679C\u961F\u5217\u6EE1\u4E86\u5C31\u6709\u53EF\u80FD\u4F1A\u51FA\u73B0\u4E22\u5305\u73B0\u8C61\u3002</p><p>\u8865\u5145\u4E00\u70B9\u5173\u4E8E<strong>SYN-ACK \u91CD\u4F20\u6B21\u6570</strong>\u7684\u95EE\u9898\uFF1A</p><p>\u670D\u52A1\u5668\u53D1\u9001\u5B8CSYN\uFF0DACK\u5305\uFF0C\u5982\u679C\u672A\u6536\u5230\u5BA2\u6237\u786E\u8BA4\u5305\uFF0C\u670D\u52A1\u5668\u8FDB\u884C\u9996\u6B21\u91CD\u4F20\uFF0C\u7B49\u5F85\u4E00\u6BB5\u65F6\u95F4\u4ECD\u672A\u6536\u5230\u5BA2\u6237\u786E\u8BA4\u5305\uFF0C\u8FDB\u884C\u7B2C\u4E8C\u6B21\u91CD\u4F20\uFF0C\u5982\u679C\u91CD\u4F20\u6B21\u6570\u8D85\u8FC7\u7CFB\u7EDF\u89C4\u5B9A\u7684\u6700\u5927\u91CD\u4F20\u6B21\u6570\uFF0C\u7CFB\u7EDF\u5C06\u8BE5\u8FDE\u63A5\u4FE1\u606F\u4ECE\u534A\u8FDE\u63A5\u961F\u5217\u4E2D\u5220\u9664\u3002</p><p><strong>\u4E09\u6B21\u63E1\u624B\u8FC7\u7A0B\u4E2D\u53EF\u4EE5\u643A\u5E26\u6570\u636E\u5417</strong></p><p>\u5176\u5B9E\u7B2C\u4E09\u6B21\u63E1\u624B\u7684\u65F6\u5019\uFF0C\u662F\u53EF\u4EE5\u643A\u5E26\u6570\u636E\u7684\uFF0C\u4E5F\u5C31\u662F\u8BF4\uFF0C\u7B2C\u4E00\u6B21\u3001\u7B2C\u4E8C\u6B21\u63E1\u624B\u4E0D\u53EF\u4EE5\u643A\u5E26\u6570\u636E\uFF0C\u800C\u7B2C\u4E09\u6B21\u63E1\u624B\u662F\u53EF\u4EE5\u643A\u5E26\u6570\u636E\u7684\u3002</p><p>\u5047\u5982\u7B2C\u4E00\u6B21\u63E1\u624B\u53EF\u4EE5\u643A\u5E26\u6570\u636E\u7684\u8BDD\uFF0C\u5982\u679C\u6709\u4EBA\u8981\u6076\u610F\u653B\u51FB\u670D\u52A1\u5668\uFF0C\u90A3\u4ED6\u6BCF\u6B21\u90FD\u5728\u7B2C\u4E00\u6B21\u63E1\u624B\u4E2D\u7684 SYN \u62A5\u6587\u4E2D\u653E\u5165\u5927\u91CF\u7684\u6570\u636E\uFF0C\u56E0\u4E3A\u653B\u51FB\u8005\u6839\u672C\u5C31\u4E0D\u7406\u670D\u52A1\u5668\u7684\u63A5\u6536\u3001\u53D1\u9001\u80FD\u529B\u662F\u5426\u6B63\u5E38\uFF0C\u7136\u540E\u75AF\u72C2\u7740\u91CD\u590D\u53D1 SYN \u62A5\u6587\u7684\u8BDD\uFF0C\u8FD9\u4F1A\u8BA9\u670D\u52A1\u5668\u82B1\u8D39\u5F88\u591A\u65F6\u95F4\u3001\u5185\u5B58\u7A7A\u95F4\u6765\u63A5\u6536\u8FD9\u4E9B\u62A5\u6587\u3002\u4E5F\u5C31\u662F\u8BF4\uFF0C\u7B2C\u4E00\u6B21\u63E1\u624B\u53EF\u4EE5\u653E\u6570\u636E\u7684\u8BDD\uFF0C\u5176\u4E2D\u4E00\u4E2A\u7B80\u5355\u7684\u539F\u56E0\u5C31\u662F\u4F1A\u8BA9\u670D\u52A1\u5668\u66F4\u52A0\u5BB9\u6613\u53D7\u5230\u653B\u51FB\u4E86\u3002</p><p>\u800C\u5BF9\u4E8E\u7B2C\u4E09\u6B21\u7684\u8BDD\uFF0C\u6B64\u65F6\u5BA2\u6237\u7AEF\u5DF2\u7ECF\u5904\u4E8E established \u72B6\u6001\uFF0C\u4E5F\u5C31\u662F\u8BF4\uFF0C\u5BF9\u4E8E\u5BA2\u6237\u7AEF\u6765\u8BF4\uFF0C\u4ED6\u5DF2\u7ECF\u5EFA\u7ACB\u8D77\u8FDE\u63A5\u4E86\uFF0C\u5E76\u4E14\u4E5F\u5DF2\u7ECF\u77E5\u9053\u670D\u52A1\u5668\u7684\u63A5\u6536\u3001\u53D1\u9001\u80FD\u529B\u662F\u6B63\u5E38\u7684\u4E86\uFF0C\u6240\u4EE5\u80FD\u643A\u5E26\u6570\u636E\u6CA1\u5565\u6BDB\u75C5\u3002</p><h3 id="\u56DB\u6B21\u6325\u624B" tabindex="-1"><a class="header-anchor" href="#\u56DB\u6B21\u6325\u624B" aria-hidden="true">#</a> \u56DB\u6B21\u6325\u624B</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-4a5e455f-5cf8-47a6-8fe4-a4c83a445f77.png" alt=""></p><p>\u6325\u624B\u8BF7\u6C42\u53EF\u4EE5\u662FClient\u7AEF\uFF0C\u4E5F\u53EF\u4EE5\u662FServer\u7AEF\u53D1\u8D77\u7684\uFF0C\u6211\u4EEC\u5047\u8BBE\u662FClient\u7AEF\u53D1\u8D77\uFF1A</p><ul><li><p>\u7B2C\u4E00\u6B21\u6325\u624B\uFF1A Client\u7AEF\u53D1\u8D77\u6325\u624B\u8BF7\u6C42\uFF0C\u5411Server\u7AEF\u53D1\u9001\u6807\u5FD7\u4F4D\u662FFIN\u62A5\u6587\u6BB5\uFF0C\u8BBE\u7F6E\u5E8F\u5217\u53F7seq\uFF0C\u6B64\u65F6\uFF0CClient\u7AEF\u8FDB\u5165<code>FIN_WAIT_1</code>\u72B6\u6001\uFF0C\u8FD9\u8868\u793AClient\u7AEF\u6CA1\u6709\u6570\u636E\u8981\u53D1\u9001\u7ED9Server\u7AEF\u4E86\u3002</p></li><li><p>\u7B2C\u4E8C\u6B21\u6325\u624B\uFF1AServer\u7AEF\u6536\u5230\u4E86Client\u7AEF\u53D1\u9001\u7684FIN\u62A5\u6587\u6BB5\uFF0C\u5411Client\u7AEF\u8FD4\u56DE\u4E00\u4E2A\u6807\u5FD7\u4F4D\u662FACK\u7684\u62A5\u6587\u6BB5\uFF0Cack\u8BBE\u4E3Aseq\u52A01\uFF0CClient\u7AEF\u8FDB\u5165<code>FIN_WAIT_2</code>\u72B6\u6001\uFF0CServer\u7AEF\u544A\u8BC9Client\u7AEF\uFF0C\u6211\u786E\u8BA4\u5E76\u540C\u610F\u4F60\u7684\u5173\u95ED\u8BF7\u6C42\u3002</p></li><li><p>\u7B2C\u4E09\u6B21\u6325\u624B\uFF1A Server\u7AEF\u5411Client\u7AEF\u53D1\u9001\u6807\u5FD7\u4F4D\u662FFIN\u7684\u62A5\u6587\u6BB5\uFF0C\u8BF7\u6C42\u5173\u95ED\u8FDE\u63A5\uFF0C\u540C\u65F6Client\u7AEF\u8FDB\u5165<code>LAST_ACK</code>\u72B6\u6001\u3002</p></li><li><p>\u7B2C\u56DB\u6B21\u6325\u624B \uFF1A Client\u7AEF\u6536\u5230Server\u7AEF\u53D1\u9001\u7684FIN\u62A5\u6587\u6BB5\uFF0C\u5411Server\u7AEF\u53D1\u9001\u6807\u5FD7\u4F4D\u662FACK\u7684\u62A5\u6587\u6BB5\uFF0C\u7136\u540EClient\u7AEF\u8FDB\u5165<code>TIME_WAIT</code>\u72B6\u6001\uFF0CServer\u7AEF\u6536\u5230Client\u7AEF\u7684ACK\u62A5\u6587\u6BB5\u4EE5\u540E\uFF0C\u5C31\u5173\u95ED\u8FDE\u63A5\uFF0C\u6B64\u65F6\uFF0CClient\u7AEF\u7B49\u5F852MSL\u7684\u65F6\u95F4\u540E\u4F9D\u7136\u6CA1\u6709\u6536\u5230\u56DE\u590D\uFF0C\u5219\u8BC1\u660EServer\u7AEF\u5DF2\u6B63\u5E38\u5173\u95ED\uFF0C\u90A3\u597D\uFF0CClient\u7AEF\u4E5F\u53EF\u4EE5\u5173\u95ED\u8FDE\u63A5\u4E86\u3002</p></li></ul><p><strong>\u4E3A\u4EC0\u4E48\u8FDE\u63A5\u7684\u65F6\u5019\u662F\u4E09\u6B21\u63E1\u624B\uFF0C\u5173\u95ED\u7684\u65F6\u5019\u5374\u662F\u56DB\u6B21\u63E1\u624B\uFF1F</strong></p><p>\u5EFA\u7ACB\u8FDE\u63A5\u65F6\u56E0\u4E3A\u5F53Server\u7AEF\u6536\u5230Client\u7AEF\u7684SYN\u8FDE\u63A5\u8BF7\u6C42\u62A5\u6587\u540E\uFF0C\u53EF\u4EE5\u76F4\u63A5\u53D1\u9001SYN+ACK\u62A5\u6587\u3002\u5176\u4E2DACK\u62A5\u6587\u662F\u7528\u6765\u5E94\u7B54\u7684\uFF0CSYN\u62A5\u6587\u662F\u7528\u6765\u540C\u6B65\u7684\u3002\u6240\u4EE5\u5EFA\u7ACB\u8FDE\u63A5\u53EA\u9700\u8981\u4E09\u6B21\u63E1\u624B\u3002</p><p>\u7531\u4E8ETCP\u534F\u8BAE\u662F\u4E00\u79CD\u9762\u5411\u8FDE\u63A5\u7684\u3001\u53EF\u9760\u7684\u3001\u57FA\u4E8E\u5B57\u8282\u6D41\u7684\u8FD0\u8F93\u5C42\u901A\u4FE1\u534F\u8BAE\uFF0CTCP\u662F\u5168\u53CC\u5DE5\u6A21\u5F0F\u3002</p><p>\u8FD9\u5C31\u610F\u5473\u7740\uFF0C\u5173\u95ED\u8FDE\u63A5\u65F6\uFF0C\u5F53Client\u7AEF\u53D1\u51FAFIN\u62A5\u6587\u6BB5\u65F6\uFF0C\u53EA\u662F\u8868\u793AClient\u7AEF\u544A\u8BC9Server\u7AEF\u6570\u636E\u5DF2\u7ECF\u53D1\u9001\u5B8C\u6BD5\u4E86\u3002\u5F53Server\u7AEF\u6536\u5230FIN\u62A5\u6587\u5E76\u8FD4\u56DEACK\u62A5\u6587\u6BB5\uFF0C\u8868\u793A\u5B83\u5DF2\u7ECF\u77E5\u9053Client\u7AEF\u6CA1\u6709\u6570\u636E\u53D1\u9001\u4E86\uFF0C\u4F46\u662FServer\u7AEF\u8FD8\u662F\u53EF\u4EE5\u53D1\u9001\u6570\u636E\u5230Client\u7AEF\u7684\uFF0C\u6240\u4EE5Server\u5F88\u53EF\u80FD\u5E76\u4E0D\u4F1A\u7ACB\u5373\u5173\u95EDSOCKET\uFF0C\u76F4\u5230Server\u7AEF\u628A\u6570\u636E\u4E5F\u53D1\u9001\u5B8C\u6BD5\u3002</p><p>\u5F53Server\u7AEF\u4E5F\u53D1\u9001\u4E86FIN\u62A5\u6587\u6BB5\u65F6\uFF0C\u8FD9\u4E2A\u65F6\u5019\u5C31\u8868\u793AServer\u7AEF\u4E5F\u6CA1\u6709\u6570\u636E\u8981\u53D1\u9001\u4E86\uFF0C\u5C31\u4F1A\u544A\u8BC9Client\u7AEF\uFF0C\u6211\u4E5F\u6CA1\u6709\u6570\u636E\u8981\u53D1\u9001\u4E86\uFF0C\u4E4B\u540E\u5F7C\u6B64\u5C31\u4F1A\u6109\u5FEB\u7684\u4E2D\u65AD\u8FD9\u6B21TCP\u8FDE\u63A5\u3002</p><p><strong>\u4E3A\u4EC0\u4E48TIME_WAIT\u8981\u7B49\u5F852MSL\uFF1F</strong></p><p>MSL\uFF1A\u62A5\u6587\u6BB5\u6700\u5927\u751F\u5B58\u65F6\u95F4\uFF0C\u5B83\u662F\u4EFB\u4F55\u62A5\u6587\u6BB5\u88AB\u4E22\u5F03\u524D\u5728\u7F51\u7EDC\u5185\u7684\u6700\u957F\u65F6\u95F4\u3002</p><p>\u6709\u4EE5\u4E0B\u4E24\u4E2A\u539F\u56E0\uFF1A</p><ul><li>\u7B2C\u4E00\u70B9\uFF1A\u4FDD\u8BC1TCP\u534F\u8BAE\u7684\u5168\u53CC\u5DE5\u8FDE\u63A5\u80FD\u591F\u53EF\u9760\u5173\u95ED\uFF1A \u7531\u4E8EIP\u534F\u8BAE\u7684\u4E0D\u53EF\u9760\u6027\u6216\u8005\u662F\u5176\u5B83\u7F51\u7EDC\u539F\u56E0\uFF0C\u5BFC\u81F4\u4E86Server\u7AEF\u6CA1\u6709\u6536\u5230Client\u7AEF\u7684ACK\u62A5\u6587\uFF0C\u90A3\u4E48Server\u7AEF\u5C31\u4F1A\u5728\u8D85\u65F6\u4E4B\u540E\u91CD\u65B0\u53D1\u9001FIN\uFF0C\u5982\u679C\u6B64\u65F6Client\u7AEF\u7684\u8FDE\u63A5\u5DF2\u7ECF\u5173\u95ED\u5904\u4E8E<code>CLOESD</code>\u72B6\u6001\uFF0C\u90A3\u4E48\u91CD\u53D1\u7684FIN\u5C31\u627E\u4E0D\u5230\u5BF9\u5E94\u7684\u8FDE\u63A5\u4E86\uFF0C\u4ECE\u800C\u5BFC\u81F4\u8FDE\u63A5\u9519\u4E71\uFF0C\u6240\u4EE5\uFF0CClient\u7AEF\u53D1\u9001\u5B8C\u6700\u540E\u7684ACK\u4E0D\u80FD\u76F4\u63A5\u8FDB\u5165<code>CLOSED</code>\u72B6\u6001\uFF0C\u800C\u8981\u4FDD\u6301<code>TIME_WAIT</code>\uFF0C\u5F53\u518D\u6B21\u6536\u5230FIN\u7684\u65F6\u5019\uFF0C\u80FD\u591F\u4FDD\u8BC1\u5BF9\u65B9\u6536\u5230ACK\uFF0C\u6700\u540E\u6B63\u786E\u5173\u95ED\u8FDE\u63A5\u3002</li><li>\u7B2C\u4E8C\u70B9\uFF1A\u4FDD\u8BC1\u8FD9\u6B21\u8FDE\u63A5\u7684\u91CD\u590D\u6570\u636E\u6BB5\u4ECE\u7F51\u7EDC\u4E2D\u6D88\u5931 \u5982\u679CClient\u7AEF\u53D1\u9001\u6700\u540E\u7684ACK\u76F4\u63A5\u8FDB\u5165<code>CLOSED</code>\u72B6\u6001\uFF0C\u7136\u540E\u53C8\u518D\u5411Server\u7AEF\u53D1\u8D77\u4E00\u4E2A\u65B0\u8FDE\u63A5\uFF0C\u8FD9\u65F6\u4E0D\u80FD\u4FDD\u8BC1\u65B0\u8FDE\u63A5\u7684\u4E0E\u521A\u5173\u95ED\u7684\u8FDE\u63A5\u7684\u7AEF\u53E3\u53F7\u662F\u4E0D\u540C\u7684\uFF0C\u4E5F\u5C31\u662F\u65B0\u8FDE\u63A5\u548C\u8001\u8FDE\u63A5\u7684\u7AEF\u53E3\u53F7\u53EF\u80FD\u4E00\u6837\u4E86\uFF0C\u90A3\u4E48\u5C31\u53EF\u80FD\u51FA\u73B0\u95EE\u9898\uFF1A\u5982\u679C\u524D\u4E00\u6B21\u7684\u8FDE\u63A5\u67D0\u4E9B\u6570\u636E\u6EDE\u7559\u5728\u7F51\u7EDC\u4E2D\uFF0C\u8FD9\u4E9B\u5EF6\u8FDF\u6570\u636E\u5728\u5EFA\u7ACB\u65B0\u8FDE\u63A5\u540E\u5230\u8FBEClient\u7AEF\uFF0C\u7531\u4E8E\u65B0\u8001\u8FDE\u63A5\u7684\u7AEF\u53E3\u53F7\u548CIP\u90FD\u4E00\u6837\uFF0CTCP\u534F\u8BAE\u5C31\u8BA4\u4E3A\u5EF6\u8FDF\u6570\u636E\u662F\u5C5E\u4E8E\u65B0\u8FDE\u63A5\u7684\uFF0C\u65B0\u8FDE\u63A5\u5C31\u4F1A\u63A5\u6536\u5230\u810F\u6570\u636E\uFF0C\u8FD9\u6837\u5C31\u4F1A\u5BFC\u81F4\u6570\u636E\u5305\u6DF7\u4E71\uFF0C\u6240\u4EE5TCP\u8FDE\u63A5\u9700\u8981\u5728<code>TIME_WAIT</code>\u72B6\u6001\u7B49\u5F852\u500DMSL\uFF0C\u624D\u80FD\u4FDD\u8BC1\u672C\u6B21\u8FDE\u63A5\u7684\u6240\u6709\u6570\u636E\u5728\u7F51\u7EDC\u4E2D\u6D88\u5931\u3002</li></ul><h3 id="\u6D41\u91CF\u63A7\u5236" tabindex="-1"><a class="header-anchor" href="#\u6D41\u91CF\u63A7\u5236" aria-hidden="true">#</a> \u6D41\u91CF\u63A7\u5236</h3><p><strong>RTT\u548CRTO</strong></p><p>RTT\uFF1A\u53D1\u9001\u4E00\u4E2A\u6570\u636E\u5305\u5230\u6536\u5230\u5BF9\u5E94\u7684ACK\uFF0C\u6240\u82B1\u8D39\u7684\u65F6\u95F4</p><p>RTO\uFF1A\u91CD\u4F20\u65F6\u95F4\u95F4\u9694\uFF08TCP\u5728\u53D1\u9001\u4E00\u4E2A\u6570\u636E\u5305\u540E\u4F1A\u542F\u52A8\u4E00\u4E2A\u91CD\u4F20\u5B9A\u65F6\u5668\uFF0CRTO\u5373\u5B9A\u65F6\u5668\u7684\u91CD\u4F20\u65F6\u95F4\uFF09</p><p>\u5F00\u59CB\u9884\u5148\u7B97\u4E00\u4E2A\u5B9A\u65F6\u5668\u65F6\u95F4\uFF0C\u5982\u679C\u56DE\u590DACK\uFF0C\u91CD\u4F20\u5B9A\u65F6\u5668\u5C31\u81EA\u52A8\u5931\u6548\uFF0C\u5373\u4E0D\u9700\u8981\u91CD\u4F20\uFF1B\u5982\u679C\u6CA1\u6709\u56DE\u590DACK\uFF0CRTO\u5B9A\u65F6\u5668\u65F6\u95F4\u5C31\u5230\u4E86\uFF0C\u91CD\u4F20\u3002</p><p>RTO\u662F\u672C\u6B21\u53D1\u9001\u5F53\u524D\u6570\u636E\u5305\u6240\u9884\u4F30\u7684\u8D85\u65F6\u65F6\u95F4\uFF0CRTO\u4E0D\u662F\u56FA\u5B9A\u5199\u6B7B\u7684\u914D\u7F6E\uFF0C\u662F\u7ECF\u8FC7RTT\u8BA1\u7B97\u51FA\u6765\u7684\u3002</p><p><strong>\u6ED1\u52A8\u7A97\u53E3</strong></p><p>TCP\u7684\u6ED1\u52A8\u7A97\u53E3\u4E3B\u8981\u6709\u4E24\u4E2A\u4F5C\u7528\uFF1A</p><ol><li><p>\u4FDD\u8BC1TCP\u7684\u53EF\u9760\u6027</p></li><li><p>\u4FDD\u8BC1TCP\u7684\u6D41\u63A7\u7279\u6027</p></li></ol><p>TCP\u62A5\u6587\u5934\u6709\u4E2A\u5B57\u6BB5\u53EBWindow\uFF0C\u7528\u4E8E\u63A5\u6536\u65B9\u901A\u77E5\u53D1\u9001\u65B9\u81EA\u5DF1\u8FD8\u6709\u591A\u5C11\u7F13\u5B58\u533A\u53EF\u4EE5\u63A5\u6536\u6570\u636E\uFF0C\u53D1\u9001\u65B9\u6839\u636E\u63A5\u6536\u65B9\u7684\u5904\u7406\u80FD\u529B\u6765\u53D1\u9001\u6570\u636E\uFF0C\u4E0D\u4F1A\u5BFC\u81F4\u63A5\u6536\u65B9\u5904\u7406\u4E0D\u8FC7\u6765\uFF0C\u8FD9\u4FBF\u662F\u6D41\u91CF\u63A7\u5236\u3002</p><p>\u53D1\u9001\u65B9\u90FD\u7EF4\u6301\u4E86\u4E00\u4E2A\u8FDE\u7EED\u7684\u5141\u8BB8\u53D1\u9001\u7684\u5E27\u7684\u5E8F\u53F7\uFF0C\u79F0\u4E3A\u53D1\u9001\u7A97\u53E3\uFF1B\u540C\u65F6\uFF0C\u63A5\u6536\u65B9\u4E5F\u7EF4\u6301\u4E86\u4E00\u4E2A\u8FDE\u7EED\u7684\u5141\u8BB8\u63A5\u6536\u7684\u5E27\u7684\u5E8F\u53F7\uFF0C\u79F0\u4E3A\u63A5\u6536\u7A97\u53E3\u3002</p><p>\u53D1\u9001\u7A97\u53E3\u548C\u63A5\u6536\u7A97\u53E3\u7684\u5E8F\u53F7\u7684\u4E0A\u4E0B\u754C\u4E0D\u4E00\u5B9A\u8981\u4E00\u6837\uFF0C\u751A\u81F3\u5927\u5C0F\u4E5F\u53EF\u4EE5\u4E0D\u540C\u3002</p><p>\u4E0D\u540C\u7684\u6ED1\u52A8\u7A97\u53E3\u534F\u8BAE\u7A97\u53E3\u5927\u5C0F\u4E00\u822C\u4E0D\u540C\u3002</p><p>\u53D1\u9001\u65B9\u7A97\u53E3\u5185\u7684\u5E8F\u5217\u53F7\u4EE3\u8868\u4E86\u90A3\u4E9B\u5DF2\u7ECF\u88AB\u53D1\u9001\uFF0C\u4F46\u662F\u8FD8\u6CA1\u6709\u88AB\u786E\u8BA4\u7684\u5E27\uFF0C\u6216\u8005\u662F\u90A3\u4E9B\u53EF\u4EE5\u88AB\u53D1\u9001\u7684\u5E27</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-d734c97b-d7d6-4af6-8674-524a81fb4dbe.png" alt=""></p><p>\u6ED1\u52A8\u7A97\u53E3\u7531\u56DB\u90E8\u5206\u7EC4\u6210\u6BCF\u4E2A\u5B57\u8282\u7684\u6570\u636E\u90FD\u6709\u552F\u4E00\u987A\u5E8F\u7684\u7F16\u7801\uFF0C\u968F\u7740\u65F6\u95F4\u53D1\u5C55\uFF0C\u672A\u786E\u8BA4\u90E8\u5206\u4E0E\u53EF\u4EE5\u53D1\u9001\u6570\u636E\u5305\u7F16\u7801\u90E8\u5206\u5411\u53F3\u79FB\u52A8\uFF0C\u5F62\u5F0F\u6ED1\u52A8\u7A97\u53E3</p><ol><li><code>\u7EFF\u8272</code>\uFF1A\u53D1\u9001\u6210\u529F\u5E76\u5DF2\u7ECFACK\u786E\u8BA4\u7684\u6570\u636E</li><li><code>\u9EC4\u8272</code>\uFF1A\u53D1\u9001\u6210\u529F\u7B49\u5F85ACK\u786E\u8BA4\u7684\u6570\u636E(\u5360\u7528\u6ED1\u52A8\u7A97\u53E3\u5927\u5C0F)</li><li><code>\u7D2B\u8272</code>\uFF1A\u6ED1\u52A8\u7A97\u53E3\u5269\u4F59\u5927\u5C0F\u53EF\u4EE5\u53D1\u9001\u7684\u5B57\u8282\u6570\u91CF(\u6ED1\u52A8\u7A97\u53E3\u53EF\u7528\u5927\u5C0F)</li><li><code>\u7070\u8272</code>\uFF1A\u540E\u7EED\u6570\u636E\u7F16\u7801</li></ol><p>\u63A5\u6536\u7A97\u53E3\u7684\u5927\u5C0F\u5C31\u662F\u6ED1\u52A8\u7A97\u53E3\u7684\u6700\u5927\u503C\uFF0C\u6570\u636E\u4F20\u8F93\u8FC7\u7A0B\u4E2D\u6ED1\u52A8\u7A97\u53E3\u7684\u53EF\u7528\u5927\u5C0F\u662F\u52A8\u6001\u53D8\u5316\u7684\u3002</p><p>\u4F46\u662F\u8FD8\u6709\u8FD9\u4E48\u4E00\u70B9\uFF0C\u6ED1\u52A8\u7A97\u53E3\u7684\u8BBE\u8BA1\u4EC5\u4EC5\u662F\u8003\u8651\u5230\u4E86\u5904\u7406\u65B9\u7684\u5904\u7406\u80FD\u529B\uFF0C\u4F46\u662F\u6CA1\u6709\u8003\u8651\u5230\u9053\u8DEF\u7684\u901A\u7545\u95EE\u9898</p><p>\u5C31\u597D\u50CF\u670D\u52A1\u7AEF\u53EF\u4EE5\u5904\u7406100M\u6570\u636E\uFF0C\u4F46\u662F\u4F20\u8F93\u7684\u6570\u636E99M\u90FD\u5835\u5728\u8DEF\u4E0A\u4E86\uFF0C\u8FD9\u4E0D\u5C31\u662F\u5BFC\u81F4\u9053\u8DEF\u963B\u585E\u4E86\u4E48\uFF1F\u8FD9\u5C31\u9700\u8981\u53E6\u5916\u4E00\u4E2A\u8BBE\u8BA1<strong>\u62E5\u585E\u907F\u514D</strong></p><p><strong>\u6D41\u91CF\u63A7\u5236\u7684\u76EE\u7684</strong></p><p>\u5982\u679C\u53D1\u9001\u8005\u53D1\u9001\u6570\u636E\u8FC7\u5FEB\uFF0C\u63A5\u6536\u8005\u6765\u4E0D\u53CA\u63A5\u6536\uFF0C\u90A3\u4E48\u5C31\u4F1A\u6709\u5206\u7EC4\u4E22\u5931\u3002</p><p>\u4E3A\u4E86\u907F\u514D\u5206\u7EC4\u4E22\u5931\uFF0C\u63A7\u5236\u53D1\u9001\u8005\u7684\u53D1\u9001\u901F\u5EA6\uFF0C\u4F7F\u5F97\u63A5\u6536\u8005\u6765\u5F97\u53CA\u63A5\u6536\uFF0C\u8FD9\u5C31\u662F\u6D41\u91CF\u63A7\u5236\u3002</p><p>\u6D41\u91CF\u63A7\u5236\u6839\u672C\u76EE\u7684\u662F\u9632\u6B62\u5206\u7EC4\u4E22\u5931\uFF0C\u5B83\u662F\u6784\u6210TCP\u53EF\u9760\u6027\u7684\u4E00\u65B9\u9762\u3002</p><p><strong>\u5982\u4F55\u5B9E\u73B0\u6D41\u91CF\u63A7\u5236</strong></p><p>\u7531\u6ED1\u52A8\u7A97\u53E3\u534F\u8BAE\uFF08\u8FDE\u7EEDARQ\u534F\u8BAE\uFF09\u5B9E\u73B0\u3002\u6ED1\u52A8\u7A97\u53E3\u534F\u8BAE\u65E2\u4FDD\u8BC1\u4E86\u5206\u7EC4\u65E0\u5DEE\u9519\u3001\u6709\u5E8F\u63A5\u6536\uFF0C\u4E5F\u5B9E\u73B0\u4E86\u6D41\u91CF\u63A7\u5236\u3002</p><p>\u4E3B\u8981\u7684\u65B9\u5F0F\u5C31\u662F\u63A5\u6536\u65B9\u8FD4\u56DE\u7684 ACK \u4E2D\u4F1A\u5305\u542B\u81EA\u5DF1\u7684\u63A5\u6536\u7A97\u53E3\u7684\u5927\u5C0F\uFF0C\u5E76\u4E14\u5229\u7528\u5927\u5C0F\u6765\u63A7\u5236\u53D1\u9001\u65B9\u7684\u6570\u636E\u53D1\u9001\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-4bdc0051-8878-4ffc-b9db-71b73ec49cd0.png" alt=""></p><p><strong>\u6D41\u91CF\u63A7\u5236\u5F15\u53D1\u7684\u6B7B\u9501</strong></p><p>\u5F53\u53D1\u9001\u8005\u6536\u5230\u4E86\u4E00\u4E2A\u7A97\u53E3\u4E3A0\u7684\u5E94\u7B54\uFF0C\u53D1\u9001\u8005\u4FBF\u505C\u6B62\u53D1\u9001\uFF0C\u7B49\u5F85\u63A5\u6536\u8005\u7684\u4E0B\u4E00\u4E2A\u5E94\u7B54\u3002</p><p>\u4F46\u662F\u5982\u679C\u8FD9\u4E2A\u7A97\u53E3\u4E0D\u4E3A0\u7684\u5E94\u7B54\u5728\u4F20\u8F93\u8FC7\u7A0B\u4E22\u5931\uFF0C\u53D1\u9001\u8005\u4E00\u76F4\u7B49\u5F85\u4E0B\u53BB\uFF0C\u800C\u63A5\u6536\u8005\u4EE5\u4E3A\u53D1\u9001\u8005\u5DF2\u7ECF\u6536\u5230\u8BE5\u5E94\u7B54\uFF0C\u7B49\u5F85\u63A5\u6536\u65B0\u6570\u636E\uFF0C\u8FD9\u6837\u53CC\u65B9\u5C31\u76F8\u4E92\u7B49\u5F85\uFF0C\u4ECE\u800C\u4EA7\u751F\u6B7B\u9501\u3002</p><p>\u4E3A\u4E86\u907F\u514D\u6D41\u91CF\u63A7\u5236\u5F15\u53D1\u7684\u6B7B\u9501\uFF0CTCP\u4F7F\u7528\u4E86<strong>\u6301\u7EED\u8BA1\u65F6\u5668</strong>\u3002\u6BCF\u5F53\u53D1\u9001\u8005\u6536\u5230\u4E00\u4E2A\u96F6\u7A97\u53E3\u7684\u5E94\u7B54\u540E\u5C31\u542F\u52A8\u8BE5\u8BA1\u65F6\u5668\u3002\u65F6\u95F4\u4E00\u5230\u4FBF\u4E3B\u52A8\u53D1\u9001\u62A5\u6587\u8BE2\u95EE\u63A5\u6536\u8005\u7684\u7A97\u53E3\u5927\u5C0F\u3002\u82E5\u63A5\u6536\u8005\u4ECD\u7136\u8FD4\u56DE\u96F6\u7A97\u53E3\uFF0C\u5219\u91CD\u7F6E\u8BE5\u8BA1\u65F6\u5668\u7EE7\u7EED\u7B49\u5F85\uFF1B\u82E5\u7A97\u53E3\u4E0D\u4E3A0\uFF0C\u5219\u8868\u793A\u5E94\u7B54\u62A5\u6587\u4E22\u5931\u4E86\uFF0C\u6B64\u65F6\u91CD\u7F6E\u53D1\u9001\u7A97\u53E3\u540E\u5F00\u59CB\u53D1\u9001\uFF0C\u8FD9\u6837\u5C31\u907F\u514D\u4E86\u6B7B\u9501\u7684\u4EA7\u751F\u3002</p><h3 id="\u62E5\u585E\u63A7\u5236" tabindex="-1"><a class="header-anchor" href="#\u62E5\u585E\u63A7\u5236" aria-hidden="true">#</a> \u62E5\u585E\u63A7\u5236</h3><p><strong>\u4E3A\u4EC0\u4E48\u8981\u8FDB\u884C\u62E5\u585E\u63A7\u5236</strong></p><p>\u5047\u8BBE\u7F51\u7EDC\u5DF2\u7ECF\u51FA\u73B0\u62E5\u585E\uFF0C\u5982\u679C\u4E0D\u5904\u7406\u62E5\u585E\uFF0C\u90A3\u4E48\u5EF6\u65F6\u589E\u52A0\uFF0C\u51FA\u73B0\u66F4\u591A\u4E22\u5305\uFF0C\u89E6\u53D1\u53D1\u9001\u65B9\u91CD\u4F20\u6570\u636E\uFF0C\u52A0\u5267\u62E5\u585E\u60C5\u51B5\uFF0C\u7EE7\u7EED\u6076\u6027\u5FAA\u73AF\u76F4\u81F3\u7F51\u7EDC\u762B\u75EA\u3002</p><p>\u62E5\u585E\u63A7\u5236\u4E0E\u6D41\u91CF\u63A7\u5236\u7684\u9002\u5E94\u573A\u666F\u548C\u76EE\u7684\u5747\u4E0D\u540C\u3002</p><p>\u62E5\u585E\u53D1\u751F\u524D\uFF0C\u53EF\u907F\u514D\u6D41\u91CF\u8FC7\u5FEB\u589E\u957F\u62D6\u57AE\u7F51\u7EDC\uFF1B\u62E5\u585E\u53D1\u751F\u65F6\uFF0C\u552F\u4E00\u7684\u9009\u62E9\u5C31\u662F\u964D\u4F4E\u6D41\u91CF\u3002</p><p>\u4E3B\u8981\u4F7F\u75284\u79CD\u7B97\u6CD5\u5B8C\u6210\u62E5\u585E\u63A7\u5236\uFF1A</p><ol><li>\u6162\u542F\u52A8</li><li>\u62E5\u585E\u907F\u514D</li><li>\u5FEB\u91CD\u4F20\u7B97\u6CD5</li><li>\u5FEB\u901F\u6062\u590D\u7B97\u6CD5</li></ol><p>\u7B97\u6CD51\u30012\u9002\u7528\u4E8E\u62E5\u585E\u53D1\u751F\u524D\uFF0C\u7B97\u6CD53\u9002\u7528\u4E8E\u62E5\u585E\u53D1\u751F\u65F6\uFF0C\u7B97\u6CD54\u9002\u7528\u4E8E\u62E5\u585E\u89E3\u51B3\u540E\uFF08\u76F8\u5F53\u4E8E\u62E5\u585E\u53D1\u751F\u524D\uFF09\u3002</p><p><strong>rwnd\u4E0Ecwnd</strong></p><p><code>rwnd</code>\uFF08Receiver Window\uFF0C\u63A5\u6536\u8005\u7A97\u53E3\uFF09\u4E0E<code>cwnd</code>\uFF08Congestion Window\uFF0C\u62E5\u585E\u7A97\u53E3\uFF09\uFF1A</p><ul><li><p>rwnd\u662F\u7528\u4E8E\u6D41\u91CF\u63A7\u5236\u7684\u7A97\u53E3\u5927\u5C0F\uFF0C\u4E3B\u8981\u53D6\u51B3\u4E8E\u63A5\u6536\u65B9\u7684\u5904\u7406\u901F\u5EA6\uFF0C\u7531\u63A5\u6536\u65B9\u901A\u77E5\u53D1\u9001\u65B9\u88AB\u52A8\u8C03\u6574\u3002</p></li><li><p>cwnd\u662F\u7528\u4E8E\u62E5\u585E\u5904\u7406\u7684\u7A97\u53E3\u5927\u5C0F\uFF0C\u53D6\u51B3\u4E8E\u7F51\u7EDC\u72B6\u51B5\uFF0C\u7531\u53D1\u9001\u65B9\u63A2\u67E5\u7F51\u7EDC\u4E3B\u52A8\u8C03\u6574\u3002</p></li></ul><p>\u540C\u65F6\u8003\u8651\u6D41\u91CF\u63A7\u5236\u4E0E\u62E5\u585E\u5904\u7406\uFF0C\u5219\u53D1\u9001\u65B9\u7A97\u53E3\u7684\u5927\u5C0F\u4E0D\u8D85\u8FC7<code>min{rwnd, cwnd}</code>\u3002</p><p><strong>\u6162\u542F\u52A8\u7B97\u6CD5</strong></p><p>\u6162\u5F00\u59CB\u7B97\u6CD5\u7684\u601D\u8DEF\u5C31\u662F\uFF0C\u4E0D\u8981\u4E00\u5F00\u59CB\u5C31\u53D1\u9001\u5927\u91CF\u7684\u6570\u636E\uFF0C\u5148\u63A2\u6D4B\u4E00\u4E0B\u7F51\u7EDC\u7684\u62E5\u585E\u7A0B\u5EA6\uFF0C\u4E5F\u5C31\u662F\u8BF4\u7531\u5C0F\u5230\u5927\u9010\u6E10\u589E\u52A0\u62E5\u585E\u7A97\u53E3\u7684\u5927\u5C0F\u3002</p><p>\u8FD9\u91CC\u7528\u62A5\u6587\u6BB5\u7684\u4E2A\u6570\u4F5C\u4E3A\u62E5\u585E\u7A97\u53E3\u7684\u5927\u5C0F\u4E3E\u4F8B\u8BF4\u660E\u6162\u5F00\u59CB\u7B97\u6CD5\uFF0C\u5B9E\u9645\u7684\u62E5\u585E\u7A97\u53E3\u5927\u5C0F\u662F\u4EE5\u5B57\u8282\u4E3A\u5355\u4F4D\u7684\u3002</p><p>\u4E00\u4E2A\u4F20\u8F93\u8F6E\u6B21\u6240\u7ECF\u5386\u7684\u65F6\u95F4\u5176\u5B9E\u5C31\u662F\u5F80\u8FD4\u65F6\u95F4RTT\uFF0C\u800C\u4E14\u6BCF\u7ECF\u8FC7\u4E00\u4E2A\u4F20\u8F93\u8F6E\u6B21\uFF0C\u62E5\u585E\u7A97\u53E3cwnd\u5C31\u52A0\u500D\u3002</p><p>\u4E3A\u4E86\u9632\u6B62cwnd\u589E\u957F\u8FC7\u5927\u5F15\u8D77\u7F51\u7EDC\u62E5\u585E\uFF0C\u8FD8\u9700\u8BBE\u7F6E\u4E00\u4E2A\u6162\u5F00\u59CB\u95E8\u9650ssthresh\u72B6\u6001\u53D8\u91CF\u3002</p><blockquote><p>ssthresh\u7684\u7528\u6CD5\u5982\u4E0B\uFF1A</p></blockquote><ul><li><p>cwnd&lt;ssthresh\u65F6\uFF0C\u4F7F\u7528\u6162\u5F00\u59CB\u7B97\u6CD5\u3002</p></li><li><p>\u5F53cwnd&gt;ssthresh\u65F6\uFF0C\u6539\u7528\u62E5\u585E\u907F\u514D\u7B97\u6CD5\u3002</p></li><li><p>\u5F53cwnd=ssthresh\u65F6\uFF0C\u6162\u5F00\u59CB\u4E0E\u62E5\u585E\u907F\u514D\u7B97\u6CD5\u4EFB\u610F</p></li></ul><p>\u6CE8\u610F\uFF0C\u8FD9\u91CC\u7684\u6162\u5E76\u4E0D\u662F\u6307cwnd\u7684\u589E\u957F\u901F\u7387\u6162\uFF0C\u800C\u662F\u6307\u5728TCP\u5F00\u59CB\u53D1\u9001\u62A5\u6587\u6BB5\u65F6\u5148\u8BBE\u7F6Ecwnd=1\uFF0C\u7136\u540E\u9010\u6E10\u589E\u5927\uFF0C\u8FD9\u5F53\u7136\u6BD4\u6309\u7167\u5927\u7684cwnd\u4E00\u4E0B\u5B50\u628A\u8BB8\u591A\u62A5\u6587\u6BB5\u7A81\u7136\u6CE8\u5165\u5230\u7F51\u7EDC\u4E2D\u8981\u6162\u5F97\u591A\u3002</p><p><strong>\u62E5\u585E\u907F\u514D\u7B97\u6CD5</strong></p><p>\u8BA9\u62E5\u585E\u7A97\u53E3cwnd\u7F13\u6162\u5730\u589E\u5927\uFF0C\u5373\u6BCF\u7ECF\u8FC7\u4E00\u4E2A\u5F80\u8FD4\u65F6\u95F4RTT\u5C31\u628A\u53D1\u9001\u65B9\u7684\u62E5\u585E\u7A97\u53E3cwnd\u52A01\uFF0C\u800C\u4E0D\u662F\u52A0\u500D\u3002</p><p>\u8FD9\u6837\u62E5\u585E\u7A97\u53E3cwnd\u6309\u7EBF\u6027\u89C4\u5F8B\u7F13\u6162\u589E\u957F\uFF0C\u6BD4\u6162\u5F00\u59CB\u7B97\u6CD5\u7684\u62E5\u585E\u7A97\u53E3\u589E\u957F\u901F\u7387\u7F13\u6162\u5F97\u591A</p><p>\u65E0\u8BBA\u662F\u5728\u6162\u5F00\u59CB\u9636\u6BB5\u8FD8\u662F\u5728\u62E5\u585E\u907F\u514D\u9636\u6BB5\uFF0C\u53EA\u8981\u53D1\u9001\u65B9\u5224\u65AD\u7F51\u7EDC\u51FA\u73B0\u62E5\u585E\uFF08\u5176\u6839\u636E\u5C31\u662F\u6CA1\u6709\u6309\u65F6\u6536\u5230\u786E\u8BA4\uFF0C\u867D\u7136\u6CA1\u6709\u6536\u5230\u786E\u8BA4\u53EF\u80FD\u662F\u5176\u4ED6\u539F\u56E0\u7684\u5206\u7EC4\u4E22\u5931\uFF0C\u4F46\u662F\u56E0\u4E3A\u65E0\u6CD5\u5224\u5B9A\uFF0C\u6240\u4EE5\u90FD\u5F53\u505A\u62E5\u585E\u6765\u5904\u7406\uFF09\uFF0C\u5C31\u628A\u6162\u5F00\u59CB\u95E8\u9650ssthresh\u8BBE\u7F6E\u4E3A\u51FA\u73B0\u62E5\u585E\u65F6\u7684\u53D1\u9001\u7A97\u53E3\u5927\u5C0F\u7684\u4E00\u534A\uFF08\u4F46\u4E0D\u80FD\u5C0F\u4E8E2\uFF09\u3002</p><p>\u7136\u540E\u628A\u62E5\u585E\u7A97\u53E3cwnd\u91CD\u65B0\u8BBE\u7F6E\u4E3A1\uFF0C\u6267\u884C\u6162\u5F00\u59CB\u7B97\u6CD5\u3002</p><p>\u8FD9\u6837\u505A\u7684\u76EE\u7684\u5C31\u662F\u8981\u8FC5\u901F\u51CF\u5C11\u4E3B\u673A\u53D1\u9001\u5230\u7F51\u7EDC\u4E2D\u7684\u5206\u7EC4\u6570\uFF0C\u4F7F\u5F97\u53D1\u751F\u62E5\u585E\u7684\u8DEF\u7531\u5668\u6709\u8DB3\u591F\u65F6\u95F4\u628A\u961F\u5217\u4E2D\u79EF\u538B\u7684\u5206\u7EC4\u5904\u7406\u5B8C\u6BD5\u3002</p><p><strong>\u6574\u4E2A\u62E5\u585E\u63A7\u5236\u7684\u6D41\u7A0B\uFF1A</strong></p><p>\u5047\u5B9Acwnd=24\u65F6\uFF0C\u7F51\u7EDC\u51FA\u73B0\u8D85\u65F6\uFF08\u62E5\u585E\uFF09\uFF0C\u5219\u66F4\u65B0\u540E\u7684ssthresh=12\uFF0Ccwnd\u91CD\u65B0\u8BBE\u7F6E\u4E3A1\uFF0C\u5E76\u6267\u884C\u6162\u5F00\u59CB\u7B97\u6CD5\u3002</p><p>\u5F53cwnd=12=ssthresh\u65F6\uFF0C\u6539\u4E3A\u6267\u884C\u62E5\u585E\u907F\u514D\u7B97\u6CD5</p><p>\u6CE8\u610F\uFF1A\u62E5\u585E\u907F\u514D\u5E76\u975E\u5B8C\u5168\u80FD\u591F\u907F\u514D\u4E86\u963B\u585E\uFF0C\u800C\u662F\u4F7F\u7F51\u7EDC\u6BD4\u8F83\u4E0D\u5BB9\u6613\u51FA\u73B0\u62E5\u585E\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-314eba07-1388-4e8b-9307-8dd8d03b0dfe.png" alt=""></p><p><strong>\u5FEB\u91CD\u4F20\u7B97\u6CD5</strong></p><p>\u5FEB\u91CD\u4F20\u8981\u6C42\u63A5\u6536\u65B9\u5728\u6536\u5230\u4E00\u4E2A\u5931\u5E8F\u7684\u62A5\u6587\u6BB5\u540E\u5C31\u7ACB\u5373\u53D1\u51FA\u91CD\u590D\u786E\u8BA4\uFF08\u4E3A\u7684\u662F\u4F7F\u53D1\u9001\u65B9\u53CA\u65E9\u77E5\u9053\u6709\u62A5\u6587\u6BB5\u6CA1\u6709\u5230\u8FBE\u5BF9\u65B9\uFF0C\u53EF\u63D0\u9AD8\u7F51\u7EDC\u541E\u5410\u91CF\u7EA620%\uFF09\u800C\u4E0D\u8981\u7B49\u5230\u81EA\u5DF1\u53D1\u9001\u6570\u636E\u65F6\u634E\u5E26\u786E\u8BA4\u3002</p><p>\u5FEB\u91CD\u4F20\u7B97\u6CD5\u89C4\u5B9A\uFF0C\u53D1\u9001\u65B9\u53EA\u8981\u4E00\u8FDE\u6536\u5230\u4E09\u4E2A\u91CD\u590D\u786E\u8BA4\u5C31\u5E94\u5F53\u7ACB\u5373\u91CD\u4F20\u5BF9\u65B9\u5C1A\u672A\u6536\u5230\u7684\u62A5\u6587\u6BB5\uFF0C\u800C\u4E0D\u5FC5\u7EE7\u7EED\u7B49\u5F85\u8BBE\u7F6E\u7684\u91CD\u4F20\u8BA1\u65F6\u5668\u65F6\u95F4\u5230\u671F</p><p><strong>\u5FEB\u6062\u590D\u7B97\u6CD5</strong></p><p>\u5FEB\u91CD\u4F20\u914D\u5408\u4F7F\u7528\u7684\u8FD8\u6709\u5FEB\u6062\u590D\u7B97\u6CD5\uFF0C\u6709\u4EE5\u4E0B\u4E24\u4E2A\u8981\u70B9\uFF1A</p><ul><li><p>\u5F53\u53D1\u9001\u65B9\u8FDE\u7EED\u6536\u5230\u4E09\u4E2A\u91CD\u590D\u786E\u8BA4\u65F6\uFF0C\u5C31\u628Assthresh\u95E8\u9650\u51CF\u534A\uFF08\u4E3A\u4E86\u9884\u9632\u7F51\u7EDC\u53D1\u751F\u62E5\u585E\uFF09\u3002</p></li><li><p>\u4F46\u662F\u63A5\u4E0B\u53BB\u5E76\u4E0D\u6267\u884C\u6162\u5F00\u59CB\u7B97\u6CD5</p></li></ul><p>\u8003\u8651\u5230\u5982\u679C\u7F51\u7EDC\u51FA\u73B0\u62E5\u585E\u7684\u8BDD\u5C31\u4E0D\u4F1A\u6536\u5230\u597D\u51E0\u4E2A\u91CD\u590D\u7684\u786E\u8BA4\uFF0C\u6240\u4EE5\u53D1\u9001\u65B9\u73B0\u5728\u8BA4\u4E3A\u7F51\u7EDC\u53EF\u80FD\u6CA1\u6709\u51FA\u73B0\u62E5\u585E\u3002</p><p>\u6240\u4EE5\u6B64\u65F6\u4E0D\u6267\u884C\u6162\u5F00\u59CB\u7B97\u6CD5\uFF0C\u800C\u662F\u5C06cwnd\u8BBE\u7F6E\u4E3Assthresh\u51CF\u534A\u540E\u7684\u503C\uFF0C\u7136\u540E\u6267\u884C\u62E5\u585E\u907F\u514D\u7B97\u6CD5\uFF0C\u4F7Fcwnd\u7F13\u6162\u589E\u5927\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-3a424e43-405f-494d-b700-093781b63035.png" alt=""></p><h3 id="socket" tabindex="-1"><a class="header-anchor" href="#socket" aria-hidden="true">#</a> Socket</h3><p>\u5373\u5957\u63A5\u5B57\uFF0C\u662F\u5E94\u7528\u5C42 \u4E0E <code>TCP/IP</code> \u534F\u8BAE\u65CF\u901A\u4FE1\u7684\u4E2D\u95F4\u8F6F\u4EF6\u62BD\u8C61\u5C42\uFF0C\u8868\u73B0\u4E3A\u4E00\u4E2A\u5C01\u88C5\u4E86 TCP / IP\u534F\u8BAE\u65CF \u7684\u7F16\u7A0B\u63A5\u53E3\uFF08API\uFF09</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-eff20ef6-9d35-4075-8c53-ab52c7a46ac7.png" alt=""></p><p><code>Socket</code>\u4E0D\u662F\u4E00\u79CD\u534F\u8BAE\uFF0C\u800C\u662F\u4E00\u4E2A\u7F16\u7A0B\u8C03\u7528\u63A5\u53E3\uFF08<code>API</code>\uFF09\uFF0C\u5C5E\u4E8E\u4F20\u8F93\u5C42\uFF08\u4E3B\u8981\u89E3\u51B3\u6570\u636E\u5982\u4F55\u5728\u7F51\u7EDC\u4E2D\u4F20\u8F93\uFF09</p><p>\u5BF9\u7528\u6237\u6765\u8BF4\uFF0C\u53EA\u9700\u8C03\u7528Socket\u53BB\u7EC4\u7EC7\u6570\u636E\uFF0C\u4EE5\u7B26\u5408\u6307\u5B9A\u7684\u534F\u8BAE\uFF0C\u5373\u53EF\u901A\u4FE1</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><h2 id="udp" tabindex="-1"><a class="header-anchor" href="#udp" aria-hidden="true">#</a> UDP</h2><p><strong>UDP\u534F\u8BAE\u7279\u70B9</strong></p><ul><li><p>UDP\u662F\u65E0\u8FDE\u63A5\u7684\u4F20\u8F93\u5C42\u534F\u8BAE\uFF1B</p></li><li><p>UDP\u4F7F\u7528\u5C3D\u6700\u5927\u52AA\u529B\u4EA4\u4ED8\uFF0C\u4E0D\u4FDD\u8BC1\u53EF\u9760\u4EA4\u4ED8\uFF1B</p></li><li><p>UDP\u662F\u9762\u5411\u62A5\u6587\u7684\uFF0C\u5BF9\u5E94\u7528\u5C42\u4EA4\u4E0B\u6765\u7684\u62A5\u6587\uFF0C\u4E0D\u5408\u5E76\uFF0C\u4E0D\u62C6\u5206\uFF0C\u4FDD\u7559\u539F\u62A5\u6587\u7684\u8FB9\u754C\uFF1B</p></li><li><p>UDP\u6CA1\u6709\u62E5\u585E\u63A7\u5236\uFF0C\u56E0\u6B64\u5373\u4F7F\u7F51\u7EDC\u51FA\u73B0\u62E5\u585E\u4E5F\u4E0D\u4F1A\u964D\u4F4E\u53D1\u9001\u901F\u7387\uFF1B</p></li><li><p>UDP\u652F\u6301\u4E00\u5BF9\u4E00\u3000\u4E00\u5BF9\u591A\u3000\u591A\u5BF9\u591A\u7684\u4EA4\u4E92\u901A\u4FE1\uFF1B</p></li><li><p>UDP\u7684\u9996\u90E8\u5F00\u9500\u5C0F\uFF0C\u53EA\u6709\uFF18\u5B57\u8282</p></li></ul><p><strong>TCP\u548CUDP\u7684\u533A\u522B</strong></p><ul><li><p>TCP\u662F\u53EF\u9760\u4F20\u8F93\uFF0CUDP\u662F\u4E0D\u53EF\u9760\u4F20\u8F93;</p></li><li><p>TCP\u9762\u5411\u8FDE\u63A5\uFF0CUDP\u65E0\u8FDE\u63A5;</p></li><li><p>TCP\u4F20\u8F93\u6570\u636E\u6709\u5E8F\uFF0CUDP\u4E0D\u4FDD\u8BC1\u6570\u636E\u7684\u6709\u5E8F\u6027;</p></li><li><p>TCP\u4E0D\u4FDD\u5B58\u6570\u636E\u8FB9\u754C\uFF0CUDP\u4FDD\u7559\u6570\u636E\u8FB9\u754C;</p></li><li><p>TCP\u4F20\u8F93\u901F\u5EA6\u76F8\u5BF9UDP\u8F83\u6162;</p></li><li><p>TCP\u6709\u6D41\u91CF\u63A7\u5236\u548C\u62E5\u585E\u63A7\u5236\uFF0CUDP\u6CA1\u6709;</p></li><li><p>TCP\u662F\u91CD\u91CF\u7EA7\u534F\u8BAE\uFF0CUDP\u662F\u8F7B\u91CF\u7EA7\u534F\u8BAE;</p></li><li><p>TCP\u9996\u90E8\u8F83\u957F20\u5B57\u8282\uFF0CUDP\u9996\u90E8\u8F83\u77ED\uFF18\u5B57\u8282;</p></li></ul><p><strong>\u57FA\u4E8ETCP\u548CUDP\u7684\u5E38\u7528\u534F\u8BAE</strong></p><p>HTTP\u3001HTTPS\u3001FTP\u3001TELNET\u3001SMTP(\u7B80\u5355\u90AE\u4EF6\u4F20\u8F93\u534F\u8BAE)\u534F\u8BAE\u57FA\u4E8E\u53EF\u9760\u7684TCP\u534F\u8BAE\u3002</p><p>TFTP\u3001DNS\u3001DHCP\u3001TFTP\u3001SNMP(\u7B80\u5355\u7F51\u7EDC\u7BA1\u7406\u534F\u8BAE)\u3001RIP\u57FA\u4E8E\u4E0D\u53EF\u9760\u7684UDP\u534F\u8BAE</p><h3 id="\u62A5\u6587\u6BB5-1" tabindex="-1"><a class="header-anchor" href="#\u62A5\u6587\u6BB5-1" aria-hidden="true">#</a> \u62A5\u6587\u6BB5</h3><p>UDP\u7684\u62A5\u6587\u6BB5\u5171\u67092\u4E2A\u5B57\u6BB5\uFF1A\u6570\u636E\u5B57\u6BB5 + \u9996\u90E8\u5B57\u6BB5</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-a5d0d209-01db-4ee7-b63b-bf2659545702.png" alt=""></p><p><strong>UDP\u62A5\u6587\u4E2D\u6BCF\u4E2A\u5B57\u6BB5\u7684\u542B\u4E49\u5982\u4E0B\uFF1A</strong></p><ul><li>\u6E90\u7AEF\u53E3\uFF1A\u8FD9\u4E2A\u5B57\u6BB5\u5360\u636E UDP \u62A5\u6587\u5934\u7684\u524D 16 \u4F4D\uFF0C\u901A\u5E38\u5305\u542B\u53D1\u9001\u6570\u636E\u62A5\u7684\u5E94\u7528\u7A0B\u5E8F\u6240\u4F7F\u7528\u7684 UDP \u7AEF\u53E3\uFF0C\u63A5\u6536\u7AEF\u7684\u5E94\u7528\u7A0B\u5E8F\u5229\u7528\u8FD9\u4E2A\u5B57\u6BB5\u7684\u503C\u4F5C\u4E3A\u53D1\u9001\u54CD\u5E94\u7684\u76EE\u7684\u5730\u5740\uFF0C\u8FD9\u4E2A\u5B57\u6BB5\u662F\u53EF\u9009\u7684\uFF0C\u6240\u4EE5\u53D1\u9001\u7AEF\u7684\u5E94\u7528\u7A0B\u5E8F\u4E0D\u4E00\u5B9A\u4F1A\u628A\u81EA\u5DF1\u7684\u7AEF\u53E3\u53F7\u5199\u5165\u8BE5\u5B57\u6BB5\u4E2D\uFF0C\u5982\u679C\u4E0D\u5199\u5165\u7AEF\u53E3\u53F7\uFF0C\u5219\u628A\u8FD9\u4E2A\u5B57\u6BB5\u8BBE\u7F6E\u4E3A 0\uFF0C\u8FD9\u6837\uFF0C\u63A5\u6536\u7AEF\u7684\u5E94\u7528\u7A0B\u5E8F\u5C31\u4E0D\u80FD\u53D1\u9001\u54CD\u5E94\u4E86\u3002</li><li>\u76EE\u7684\u7AEF\u53E3\uFF1A\u63A5\u6536\u7AEF\u8BA1\u7B97\u673A\u4E0A UDP \u8F6F\u4EF6\u4F7F\u7528\u7684\u7AEF\u53E3\uFF0C\u5360\u636E 16 \u4F4D\u3002</li><li>\u957F\u5EA6\uFF1A\u8BE5\u5B57\u6BB5\u5360\u636E 16 \u4F4D\uFF0C\u8868\u793A UDP \u6570\u636E\u62A5\u957F\u5EA6\uFF0C\u5305\u542B UDP \u62A5\u6587\u5934\u548C UDP \u6570\u636E\u957F\u5EA6\uFF0C\u56E0\u4E3A UDP \u62A5\u6587\u5934\u957F\u5EA6\u662F 8 \u4E2A\u5B57\u8282\uFF0C\u6240\u4EE5\u8FD9\u4E2A\u503C\u6700\u5C0F\u4E3A 8\u3002</li><li>\u6821\u9A8C\u503C\uFF1A\u8BE5\u5B57\u6BB5\u5360\u636E 16 \u4F4D\uFF0C\u53EF\u4EE5\u68C0\u9A8C\u6570\u636E\u5728\u4F20\u8F93\u8FC7\u7A0B\u4E2D\u662F\u5426\u88AB\u635F\u574F\u3002</li></ul><h2 id="\u7F51\u7EDC\u5C42" tabindex="-1"><a class="header-anchor" href="#\u7F51\u7EDC\u5C42" aria-hidden="true">#</a> \u7F51\u7EDC\u5C42</h2><h3 id="mac\u5730\u5740" tabindex="-1"><a class="header-anchor" href="#mac\u5730\u5740" aria-hidden="true">#</a> MAC\u5730\u5740</h3><p>MAC\u79F0\u4E3A\u7269\u7406\u5730\u5740\uFF0C\u4E5F\u53EB\u786C\u4EF6\u5730\u5740\uFF0C\u7528\u6765\u5B9A\u4E49\u7F51\u7EDC\u8BBE\u5907\u7684\u4F4D\u7F6E\uFF0CMAC\u5730\u5740\u662F\u7F51\u5361\u51FA\u5382\u65F6\u8BBE\u5B9A\u7684\uFF0C\u662F\u56FA\u5B9A\u7684\uFF08\u4F46\u53EF\u4EE5\u901A\u8FC7\u5728\u8BBE\u5907\u7BA1\u7406\u5668\u4E2D\u6216\u6CE8\u518C\u8868\u7B49\u65B9\u5F0F\u4FEE\u6539\uFF0C\u540C\u4E00\u7F51\u6BB5\u5185\u7684MAC\u5730\u5740\u5FC5\u987B\u552F\u4E00\uFF09\u3002</p><p>MAC\u5730\u5740\u91C7\u7528\u5341\u516D\u8FDB\u5236\u6570\u8868\u793A\uFF0C\u957F\u5EA6\u662F6\u4E2A\u5B57\u8282\uFF0848\u4F4D\uFF09\uFF0C\u5206\u4E3A\u524D24\u4F4D\u548C\u540E24\u4F4D\u3002</p><blockquote><p>MAC\u5730\u5740\u5BF9\u5E94\u4E8EOSI\u53C2\u8003\u6A21\u578B\u7684\u7B2C\u4E8C\u5C42\u6570\u636E\u94FE\u8DEF\u5C42\uFF0C\u5DE5\u4F5C\u5728\u6570\u636E\u94FE\u8DEF\u5C42\u7684\u4EA4\u6362\u673A\u7EF4\u62A4\u7740\u8BA1\u7B97\u673AMAC\u5730\u5740\u548C\u81EA\u8EAB\u7AEF\u53E3\u7684\u6570\u636E\u5E93\uFF0C\u4EA4\u6362\u673A\u6839\u636E\u6536\u5230\u7684\u6570\u636E\u5E27\u4E2D\u7684\u76EE\u7684MAC\u5730\u5740\u5B57\u6BB5\u6765\u8F6C\u53D1\u6570\u636E\u5E27\u3002</p></blockquote><h3 id="ip\u5730\u5740" tabindex="-1"><a class="header-anchor" href="#ip\u5730\u5740" aria-hidden="true">#</a> IP\u5730\u5740</h3><p>\u5E38\u89C1\u7684IP\u5730\u5740\u5206\u4E3AIPv4\u4E0EIPv6\u4E24\u5927\u7C7B\uFF0C\u5F53\u524D\u5E7F\u6CDB\u5E94\u7528\u7684\u662FIPv4\uFF0C\u76EE\u524DIPv4\u51E0\u4E4E\u8017\u5C3D\uFF0C\u4E0B\u4E00\u9636\u6BB5\u5FC5\u7136\u4F1A\u8FDB\u884C\u7248\u672C\u5347\u7EA7\u5230IPv6\uFF1B</p><p>IP\u5730\u5740\u662F\u4EE5\u7F51\u7EDC\u53F7\u548C\u4E3B\u673A\u53F7\u6765\u6807\u793A\u7F51\u7EDC\u4E0A\u7684\u4E3B\u673A\u7684\uFF0C\u6211\u4EEC\u628A\u7F51\u7EDC\u53F7\u76F8\u540C\u7684\u4E3B\u673A\u79F0\u4E4B\u4E3A\u672C\u5730\u7F51\u7EDC\uFF0C\u7F51\u7EDC\u53F7\u4E0D\u76F8\u540C\u7684\u4E3B\u673A\u79F0\u4E4B\u4E3A\u8FDC\u7A0B\u7F51\u7EDC\u4E3B\u673A</p><p>\u672C\u5730\u7F51\u7EDC\u4E2D\u7684\u4E3B\u673A\u53EF\u4EE5\u76F4\u63A5\u76F8\u4E92\u901A\u4FE1\uFF1B\u8FDC\u7A0B\u7F51\u7EDC\u4E2D\u7684\u4E3B\u673A\u8981\u76F8\u4E92\u901A\u4FE1\u5FC5\u987B\u901A\u8FC7\u672C\u5730\u7F51\u5173\uFF08Gateway\uFF09\u6765\u4F20\u9012\u8F6C\u53D1\u6570\u636E\u3002</p><p>IP\u5730\u5740\u5BF9\u5E94\u4E8EOSI\u53C2\u8003\u6A21\u578B\u7684\u7B2C\u4E09\u5C42\u7F51\u7EDC\u5C42\uFF0C\u5DE5\u4F5C\u5728\u7F51\u7EDC\u5C42\u7684\u8DEF\u7531\u5668\u6839\u636E\u76EE\u6807IP\u548C\u6E90IP\u6765\u5224\u65AD\u662F\u5426\u5C5E\u4E8E\u540C\u4E00\u7F51\u6BB5\uFF0C\u5982\u679C\u662F\u4E0D\u540C\u7F51\u6BB5\uFF0C\u5219\u8F6C\u53D1\u6570\u636E\u5305\u3002</p><p><strong>IP\u5730\u5740\u683C\u5F0F\u548C\u8868\u793A</strong></p><p>IP\u5730\u5740(IPv4)\u753132\u4F4D\u4E8C\u8FDB\u5236\u6570\u7EC4\u6210\uFF0C\u5206\u4E3A4\u6BB5\uFF084\u4E2A\u5B57\u8282\uFF09\uFF0C\u6BCF\u4E00\u6BB5\u4E3A8\u4F4D\u4E8C\u8FDB\u5236\u6570\uFF081\u4E2A\u5B57\u8282\uFF09</p><p>\u6BCF\u4E00\u6BB58\u4F4D\u4E8C\u8FDB\u5236\uFF0C\u4E2D\u95F4\u4F7F\u7528\u82F1\u6587\u7684\u6807\u70B9\u7B26\u53F7<code>.</code>\u9694\u5F00</p><p>\u7531\u4E8E\u4E8C\u8FDB\u5236\u6570\u592A\u957F\uFF0C\u4E3A\u4E86\u4FBF\u4E8E\u8BB0\u5FC6\u548C\u8BC6\u522B\uFF0C\u628A\u6BCF\u4E00\u6BB58\u4F4D\u4E8C\u8FDB\u5236\u6570\u8F6C\u6210\u5341\u8FDB\u5236\uFF0C\u5927\u5C0F\u4E3A0\u81F3255\u3002</p><p>IP\u5730\u5740\u7684\u8FD9\u79CD\u8868\u793A\u6CD5\u53EB\u505A<strong>\u70B9\u5206\u5341\u8FDB\u5236\u8868\u793A\u6CD5</strong>\u3002</p><p>IP\u5730\u5740\u8868\u793A\u4E3A\uFF1A<code>xxx.xxx.xxx.xxx</code></p><p>\u4E3E\u4E2A\u6817\u5B50\uFF1A<code>210.21.196.6</code>\u5C31\u662F\u4E00\u4E2AIP\u5730\u5740\u7684\u8868\u793A\u3002</p><p>\u8BA1\u7B97\u673A\u7684IP\u5730\u5740\u7531\u4E24\u90E8\u5206\u7EC4\u6210\uFF0C\u4E00\u90E8\u5206\u4E3A\u7F51\u7EDC\u6807\u8BC6\uFF0C\u4E00\u90E8\u5206\u4E3A\u4E3B\u673A\u6807\u8BC6\uFF0C\u540C\u4E00\u7F51\u6BB5\u5185\u7684\u8BA1\u7B97\u673A\u7F51\u7EDC\u90E8\u5206\u76F8\u540C\uFF0C\u4E3B\u673A\u90E8\u5206\u4E0D\u80FD\u540C\u65F6\u91CD\u590D\u51FA\u73B0\u3002</p><p><strong>\u8DEF\u7531\u5668</strong>\u8FDE\u63A5\u4E0D\u540C\u7F51\u6BB5\uFF0C\u8D1F\u8D23\u4E0D\u540C\u7F51\u6BB5\u4E4B\u95F4\u7684\u6570\u636E\u8F6C\u53D1\uFF0C<strong>\u4EA4\u6362\u673A</strong>\u8FDE\u63A5\u7684\u662F\u540C\u4E00\u7F51\u6BB5\u7684\u8BA1\u7B97\u673A\u3002</p><p>\u901A\u8FC7\u8BBE\u7F6E\u7F51\u7EDC\u5730\u5740\u548C\u4E3B\u673A\u5730\u5740\uFF0C\u5728\u4E92\u76F8\u8FDE\u63A5\u7684\u6574\u4E2A\u7F51\u7EDC\u4E2D\u4FDD\u8BC1\u6BCF\u53F0\u4E3B\u673A\u7684IP\u5730\u5740\u4E0D\u4F1A\u4E92\u76F8\u91CD\u53E0\uFF0C\u5373IP\u5730\u5740\u5177\u6709\u4E86\u552F\u4E00\u6027\u3002</p><p><strong>IP\u5730\u5740\u5206\u7C7B\u8BE6\u89E3</strong></p><p>IP\u5730\u5740\u5206A\u3001B\u3001C\u3001D\u3001E\u4E94\u7C7B\uFF0C\u5176\u4E2DA\u3001B\u3001C\u8FD9\u4E09\u7C7B\u662F\u6BD4\u8F83\u5E38\u7528\u7684IP\u5730\u5740\uFF0CD\u3001E\u7C7B\u4E3A\u7279\u6B8A\u5730\u5740\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-212f3f9b-b07f-4cc9-81eb-55bb478f1b66.png" alt=""></p><h3 id="\u5B50\u7F51\u63A9\u7801" tabindex="-1"><a class="header-anchor" href="#\u5B50\u7F51\u63A9\u7801" aria-hidden="true">#</a> \u5B50\u7F51\u63A9\u7801</h3><p><strong>\u5B50\u7F51\u63A9\u7801\u7684\u6982\u5FF5\u53CA\u4F5C\u7528</strong></p><p>\u901A\u8FC7\u5B50\u7F51\u63A9\u7801\uFF0C\u624D\u80FD\u8868\u660E\u4E00\u53F0\u4E3B\u673A\u6240\u5728\u7684\u5B50\u7F51\u4E0E\u5176\u4ED6\u5B50\u7F51\u7684\u5173\u7CFB\uFF0C\u4F7F\u7F51\u7EDC\u6B63\u5E38\u5DE5\u4F5C\u3002</p><p>\u5B50\u7F51\u63A9\u7801\u548CIP\u5730\u5740\u505A\u4E0E\u8FD0\u7B97\uFF0C\u5206\u79BB\u51FAIP\u5730\u5740\u4E2D\u7684\u7F51\u7EDC\u5730\u5740\u548C\u4E3B\u673A\u5730\u5740\uFF0C\u7528\u4E8E\u5224\u65AD\u8BE5IP\u5730\u5740\u662F\u5728\u672C\u5730\u7F51\u7EDC\u4E0A\uFF0C\u8FD8\u662F\u5728\u8FDC\u7A0B\u7F51\u7EDC\u7F51\u4E0A\u3002</p><p>\u5B50\u7F51\u63A9\u7801\u8FD8\u7528\u4E8E\u5C06\u7F51\u7EDC\u8FDB\u4E00\u6B65\u5212\u5206\u4E3A\u82E5\u5E72\u5B50\u7F51\uFF0C\u4EE5\u907F\u514D\u4E3B\u673A\u8FC7\u591A\u800C\u62E5\u5835\u6216\u8FC7\u5C11\u800CIP\u6D6A\u8D39\u3002</p><p><strong>\u5B50\u7F51\u63A9\u7801\u7684\u7EC4\u6210</strong></p><p>\u540CIP\u5730\u5740\u4E00\u6837\uFF0C\u5B50\u7F51\u63A9\u7801\u662F\u7531\u957F\u5EA6\u4E3A32\u4F4D\u4E8C\u8FDB\u5236\u6570\u7EC4\u6210\u7684\u4E00\u4E2A\u5730\u5740\u3002</p><p>\u5B50\u7F51\u63A9\u780132\u4F4D\u4E0EIP\u5730\u574032\u4F4D\u76F8\u5BF9\u5E94\uFF0CIP\u5730\u5740\u5982\u679C\u67D0\u4F4D\u662F\u7F51\u7EDC\u5730\u5740\uFF0C\u5219\u5B50\u7F51\u63A9\u7801\u4E3A1\uFF0C\u5426\u5219\u4E3A0\u3002</p><p>\u4E3E\u4E2A\u6817\u5B50\uFF1A\u5982\uFF1A<code>11111111.11111111.11111111.00000000</code></p><blockquote><p>\u5DE6\u8FB9\u8FDE\u7EED\u76841\u7684\u4E2A\u6570\u4EE3\u8868\u7F51\u7EDC\u53F7\u7684\u957F\u5EA6\uFF0C\uFF08\u4F7F\u7528\u65F6\u5FC5\u987B\u662F\u8FDE\u7EED\u7684\uFF0C\u7406\u8BBA\u4E0A\u4E5F\u53EF\u4EE5\u4E0D\u8FDE\u7EED\uFF09\uFF0C\u53F3\u8FB9\u8FDE\u7EED\u76840\u7684\u4E2A\u6570\u4EE3\u8868\u4E3B\u673A\u53F7\u7684\u957F\u5EA6\u3002</p></blockquote><p><strong>\u4E3A\u4EC0\u4E48\u8981\u4F7F\u7528\u5B50\u7F51\u63A9\u7801</strong></p><p>\u4E24\u53F0\u4E3B\u673A\u8981\u901A\u4FE1\uFF0C\u9996\u5148\u8981\u5224\u65AD\u662F\u5426\u5904\u4E8E\u540C\u4E00\u7F51\u6BB5\uFF0C\u5373\u7F51\u7EDC\u5730\u5740\u662F\u5426\u76F8\u540C\u3002</p><p>\u5982\u679C\u76F8\u540C\uFF0C\u90A3\u4E48\u53EF\u4EE5\u628A\u6570\u636E\u5305\u76F4\u63A5\u53D1\u9001\u5230\u76EE\u6807\u4E3B\u673A\uFF0C\u5426\u5219\u5C31\u9700\u8981\u8DEF\u7531\u7F51\u5173\u5C06\u6570\u636E\u5305\u8F6C\u53D1\u9001\u5230\u76EE\u7684\u5730\u3002</p><blockquote><p>\u53EF\u4EE5\u8FD9\u4E48\u7B80\u5355\u7684\u7406\u89E3\uFF1AA\u4E3B\u673A\u8981\u4E0EB\u4E3B\u673A\u901A\u4FE1\uFF0CA\u548CB\u5404\u81EA\u7684IP\u5730\u5740\u4E0EA\u4E3B\u673A\u7684\u5B50\u7F51\u63A9\u7801\u8FDB\u884CAnd\u4E0E\u8FD0\u7B97\uFF0C\u770B\u5F97\u51FA\u7684\u7ED3\u679C\uFF1A</p><p>1\u3001\u7ED3\u679C\u5982\u679C\u76F8\u540C\uFF0C\u5219\u8BF4\u660E\u8FD9\u4E24\u53F0\u4E3B\u673A\u662F\u5904\u4E8E\u540C\u4E00\u4E2A\u7F51\u6BB5\uFF0C\u8FD9\u6837A\u53EF\u4EE5\u901A\u8FC7ARP\u5E7F\u64AD\u53D1\u73B0B\u7684MAC\u5730\u5740\uFF0CB\u4E5F\u53EF\u4EE5\u53D1\u73B0A\u7684MAC\u5730\u5740\u6765\u5B9E\u73B0\u6B63\u5E38\u901A\u4FE1\u3002</p><p>2\u3001\u5982\u679C\u7ED3\u679C\u4E0D\u540C\uFF0CARP\u5E7F\u64AD\u4F1A\u5728\u672C\u5730\u7F51\u5173\u7EC8\u7ED3\uFF0C\u8FD9\u65F6\u5019A\u4F1A\u628A\u53D1\u7ED9B\u7684\u6570\u636E\u5305\u5148\u53D1\u7ED9\u672C\u5730\u7F51\u5173\uFF0C\u7F51\u5173\u518D\u6839\u636EB\u4E3B\u673A\u7684IP\u5730\u5740\u6765\u67E5\u8BE2\u8DEF\u7531\u8868\uFF0C\u518D\u5C06\u6570\u636E\u5305\u7EE7\u7EED\u4F20\u9012\u8F6C\u53D1\uFF0C\u6700\u7EC8\u9001\u8FBE\u5230\u76EE\u7684\u5730B\u3002</p></blockquote><hr><blockquote><p>\u8BA1\u7B97\u673A\u7684\u7F51\u5173\uFF08Gateway\uFF09\u5C31\u662F\u5230\u5176\u4ED6\u7F51\u6BB5\u7684\u51FA\u53E3\uFF0C\u4E5F\u5C31\u662F\u8DEF\u7531\u5668\u63A5\u53E3IP\u5730\u5740\u3002</p><p>\u8DEF\u7531\u5668\u63A5\u53E3\u4F7F\u7528\u7684IP\u5730\u5740\u53EF\u4EE5\u662F\u672C\u7F51\u6BB5\u4E2D\u4EFB\u4F55\u4E00\u4E2A\u5730\u5740\uFF0C\u4E0D\u8FC7\u901A\u5E38\u4F7F\u7528\u8BE5\u7F51\u6BB5\u7684\u7B2C\u4E00\u4E2A\u53EF\u7528\u7684\u5730\u5740\u6216\u6700\u540E\u4E00\u4E2A\u53EF\u7528\u7684\u5730\u5740\uFF0C\u8FD9\u662F\u4E3A\u4E86\u5C3D\u53EF\u80FD\u907F\u514D\u548C\u672C\u7F51\u6BB5\u4E2D\u7684\u4E3B\u673A\u5730\u5740\u51B2\u7A81\u3002</p></blockquote><p>\u5728\u5982\u4E0B\u62D3\u6251\u56FE\u793A\u4F8B\u4E2D\uFF0CA\u4E0EB\uFF0CC\u4E0ED\uFF0C\u90FD\u53EF\u4EE5\u76F4\u63A5\u76F8\u4E92\u901A\u4FE1\uFF08\u90FD\u662F\u5C5E\u4E8E\u5404\u81EA\u540C\u4E00\u7F51\u6BB5\uFF0C\u4E0D\u7528\u7ECF\u8FC7\u8DEF\u7531\u5668\uFF09</p><p>\u4F46\u662FA\u4E0EC\uFF0CA\u4E0ED\uFF0CB\u4E0EC\uFF0CB\u4E0ED\u5B83\u4EEC\u4E4B\u95F4\u4E0D\u5C5E\u4E8E\u540C\u4E00\u7F51\u6BB5\uFF0C\u6240\u4EE5\u5B83\u4EEC\u901A\u4FE1\u662F\u8981\u7ECF\u8FC7\u672C\u5730\u7F51\u5173\uFF0C\u7136\u540E\u8DEF\u7531\u5668\u6839\u636E\u5BF9\u65B9IP\u5730\u5740\uFF0C\u5728\u8DEF\u7531\u8868\u4E2D\u67E5\u627E\u6070\u597D\u6709\u5339\u914D\u5230\u5BF9\u65B9IP\u5730\u5740\u7684\u76F4\u8FDE\u8DEF\u7531\uFF0C\u4E8E\u662F\u4ECE\u53E6\u4E00\u8FB9\u7F51\u5173\u63A5\u53E3\u8F6C\u53D1\u51FA\u53BB\u5B9E\u73B0\u4E92\u8FDE</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-e1d68baa-9d8c-4595-bcb5-0dc5f6e240fe.png" alt=""></p><p><strong>\u5B50\u7F51\u63A9\u7801\u548CIP\u5730\u5740\u7684\u5173\u7CFB</strong></p><p>\u5B50\u7F51\u63A9\u7801\u662F\u7528\u6765\u5224\u65AD\u4EFB\u610F\u4E24\u53F0\u4E3B\u673A\u7684IP\u5730\u5740\u662F\u5426\u5C5E\u4E8E\u540C\u4E00\u7F51\u7EDC\u7684\u4F9D\u636E</p><p>\u62FF\u53CC\u65B9\u4E3B\u673A\u7684IP\u5730\u5740\u548C\u81EA\u5DF1\u4E3B\u673A\u7684\u5B50\u7F51\u63A9\u7801\u505A\u4E0E\u8FD0\u7B97\uFF0C\u5982\u7ED3\u679C\u4E3A\u540C\u4E00\u7F51\u7EDC\uFF0C\u5C31\u53EF\u4EE5\u76F4\u63A5\u901A\u4FE1</p><p><strong>\u5982\u4F55\u6839\u636EIP\u5730\u5740\u548C\u5B50\u7F51\u63A9\u7801\uFF0C\u8BA1\u7B97\u7F51\u7EDC\u5730\u5740\uFF1A</strong></p><p>\u5C06IP\u5730\u5740\u4E0E\u5B50\u7F51\u63A9\u7801\u8F6C\u6362\u6210\u4E8C\u8FDB\u5236\u6570\u3002</p><p>\u5C06\u4E8C\u8FDB\u5236\u5F62\u5F0F\u7684 IP \u5730\u5740\u4E0E\u5B50\u7F51\u63A9\u7801\u505A\u4E0E\u8FD0\u7B97\u3002</p><p>\u5C06\u5F97\u51FA\u7684\u7ED3\u679C\u8F6C\u5316\u4E3A\u5341\u8FDB\u5236\uFF0C\u4FBF\u5F97\u5230\u7F51\u7EDC\u5730\u5740\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-5fab32f0-20d1-4c05-bfb9-47928ceac65d.png" alt=""></p><h3 id="\u7F51\u5173" tabindex="-1"><a class="header-anchor" href="#\u7F51\u5173" aria-hidden="true">#</a> \u7F51\u5173</h3><p>\u7F51\u5173\u5B9E\u8D28\u4E0A\u662F\u4E00\u4E2A\u7F51\u7EDC\u901A\u5411\u5176\u4ED6\u7F51\u7EDC\u7684IP\u5730\u5740\u3002</p><p>\u6BD4\u5982\u6709\u7F51\u7EDCA\u548C\u7F51\u7EDCB\uFF0C\u7F51\u7EDCA\u7684IP\u5730\u5740\u8303\u56F4\u4E3A<code>192.168.1.1~192. 168.1.254</code>\uFF0C\u5B50\u7F51\u63A9\u7801\u4E3A<code>255.255.255.0</code>\uFF1B</p><p>\u7F51\u7EDCB\u7684IP\u5730\u5740\u8303\u56F4\u4E3A<code>192.168.2.1~192.168.2.254</code>\uFF0C\u5B50\u7F51\u63A9\u7801\u4E3A<code>255.255.255.0</code>\u3002</p><p>\u5728\u6CA1\u6709\u8DEF\u7531\u5668\u7684\u60C5\u51B5\u4E0B\uFF0C\u4E24\u4E2A\u7F51\u7EDC\u4E4B\u95F4\u662F\u4E0D\u80FD\u8FDB\u884CTCP/IP\u901A\u4FE1\u7684\uFF0C\u5373\u4F7F\u662F\u4E24\u4E2A\u7F51\u7EDC\u8FDE\u63A5\u5728\u540C\u4E00\u53F0\u4EA4\u6362\u673A(\u6216\u96C6\u7EBF\u5668)\u4E0A\uFF0CTCP/IP\u534F\u8BAE\u4E5F\u4F1A\u6839\u636E\u5B50\u7F51\u63A9\u7801(<code>255.255.255.0</code>)\u5224\u5B9A\u4E24\u4E2A\u7F51\u7EDC\u4E2D\u7684\u4E3B\u673A\u5904\u5728\u4E0D\u540C\u7684\u7F51\u7EDC\u91CC\u3002</p><p>\u800C\u8981\u5B9E\u73B0\u8FD9\u4E24\u4E2A\u7F51\u7EDC\u4E4B\u95F4\u7684\u901A\u4FE1\uFF0C\u5219\u5FC5\u987B\u901A\u8FC7\u7F51\u5173\u3002</p><p>\u5982\u679C\u7F51\u7EDCA\u4E2D\u7684\u4E3B\u673A\u53D1\u73B0\u6570\u636E\u5305\u7684\u76EE\u7684\u4E3B\u673A\u4E0D\u5728\u672C\u5730\u7F51\u7EDC\u4E2D\uFF0C\u5C31\u628A\u6570\u636E\u5305\u8F6C\u53D1\u7ED9\u5B83\u81EA\u5DF1\u7684\u7F51\u5173\uFF0C\u518D\u7531\u7F51\u5173\u8F6C\u53D1\u7ED9\u7F51\u7EDCB\u7684\u7F51\u5173\uFF0C\u7F51\u7EDCB\u7684\u7F51\u5173\u518D\u8F6C\u53D1\u7ED9\u7F51\u7EDCB\u7684\u67D0\u4E2A\u4E3B\u673A\u3002\u7F51\u7EDCB\u5411\u7F51\u7EDCA\u8F6C\u53D1\u6570\u636E\u5305\u7684\u8FC7\u7A0B\u3002</p><p><strong>\u6240\u4EE5\u8BF4\uFF0C\u53EA\u6709\u8BBE\u7F6E\u597D\u7F51\u5173\u7684IP\u5730\u5740\uFF0CTCP/IP\u534F\u8BAE\u624D\u80FD\u5B9E\u73B0\u4E0D\u540C\u7F51\u7EDC\u4E4B\u95F4\u7684\u76F8\u4E92\u901A\u4FE1\u3002</strong></p><blockquote><p>\u90A3\u4E48\u8FD9\u4E2AIP\u5730\u5740\u662F\u54EA\u53F0\u673A\u5668\u7684IP\u5730\u5740\u5462\uFF1F</p></blockquote><p>\u7F51\u5173\u7684IP\u5730\u5740\u662F\u5177\u6709\u8DEF\u7531\u529F\u80FD\u7684\u8BBE\u5907\u7684IP\u5730\u5740\uFF0C\u5177\u6709\u8DEF\u7531\u529F\u80FD\u7684\u8BBE\u5907\u6709\u8DEF\u7531\u5668\u3001\u542F\u7528\u4E86\u8DEF\u7531\u534F\u8BAE\u7684\u670D\u52A1\u5668(\u5B9E\u8D28\u4E0A\u76F8\u5F53\u4E8E\u4E00\u53F0\u8DEF\u7531\u5668)\u3001\u4EE3\u7406\u670D\u52A1\u5668(\u4E5F\u76F8\u5F53\u4E8E\u4E00\u53F0\u8DEF\u7531\u5668)\u3002</p><h3 id="ping" tabindex="-1"><a class="header-anchor" href="#ping" aria-hidden="true">#</a> Ping</h3><p>Ping\u662F\u6211\u4EEC\u6D4B\u8BD5\u7F51\u7EDC\u8FDE\u63A5\u7684\u5E38\u7528\u6307\u4EE4\u3002</p><p>\u5B83\u5229\u7528ICMP\u62A5\u6587\u68C0\u6D4B\u7F51\u7EDC\u8FDE\u63A5\u3002</p><p><strong>\u5047\u8BBEA ping B</strong></p><ol><li><p>ping\u901A\u77E5\u7CFB\u7EDF\u5EFA\u7ACB\u4E00\u4E2A\u56FA\u5B9A\u683C\u5F0F\u7684ICMP\u8BF7\u6C42\u6570\u636E\u5305\u3002</p></li><li><p>ICMP\u534F\u8BAE\u6253\u5305\u8FD9\u4E2A\u6570\u636E\u5305\u548CB\u7684IP\u5730\u5740\u8F6C\u4EA4\u7ED9IP\u534F\u8BAE\u5C42</p></li><li><p>IP\u5C42\u534F\u8BAE\u5C06\u673A\u5668B\u7684IP\u5730\u5740\u4E3A\u76EE\u7684\u5730\u5740\uFF0C\u672C\u673A\u7684IP\u5730\u5740\u4E3A\u6E90\u5730\u5740\uFF0C\u52A0\u4E0A\u4E00\u4E9B\u5934\u90E8\u5FC5\u8981\u7684\u63A7\u5236\u4FE1\u606F\uFF0C\u6784\u5EFA\u4E00\u4E2AIP\u6570\u636E\u5305</p></li><li><p>\u83B7\u53D6B\u7684MAC\u5730\u5740\uFF0C\u505A\u8FD9\u4E2A\u64CD\u4F5C\u9996\u5148\u673A\u5668A\u4F1A\u5224\u65ADB\u662F\u5426\u5728\u540C\u4E00\u7F51\u6BB5\u5185\uFF0C\u82E5IP\u5C42\u534F\u8BAE\u901A\u8FC7B\u7684IP\u5730\u5740\u548C\u81EA\u5DF1\u7684\u5B50\u7F51\u63A9\u7801\uFF0C\u53D1\u73B0\u5B83\u8DDF\u81EA\u5DF1\u5C5E\u4E8E\u540C\u4E00\u7F51\u7EDC\uFF0C\u5C31\u76F4\u63A5\u5728\u672C\u7F51\u7EDC\u67E5\u627E\u8FD9\u53F0\u673A\u5668\u7684MAC\uFF0C\u5426\u5219\u5219\u901A\u8FC7\u8DEF\u7531\u5668\u8FDB\u884C\u7C7B\u4F3C\u67E5\u627E\u3002</p></li></ol><blockquote><p>\u63A5\u4E0B\u6765\u662FARP\u534F\u8BAE\u6839\u636EIP\u5730\u5740\u67E5\u627EMAC\u5730\u5740\u7684\u8FC7\u7A0B:</p></blockquote><ul><li><p>\u82E5\u4E24\u53F0\u673A\u5668\u4E4B\u524D\u6709\u8FC7\u901A\u4FE1\uFF0C\u5728\u673A\u5668A\u7684ARP\u7F13\u5B58\u8868\u91CC\u5E94\u8BE5\u5B58\u6709B\u7684IP\u4E0E\u5176MAC\u5730\u5740\u7684\u6620\u5C04\u5173\u7CFB\u3002</p></li><li><p>\u82E5\u6CA1\u6709\uFF0C\u5219\u901A\u8FC7\u53D1\u9001ARP\u8BF7\u6C42\u5E7F\u64AD\uFF0C\u5F97\u5230\u56DE\u5E94\u7684B\u673A\u5668MAC\u5730\u5740\uFF0C\u5E76\u4EA4\u7ED9\u6570\u636E\u94FE\u8DEF\u5C42</p></li></ul><ol start="5"><li><p>\u6570\u636E\u94FE\u8DEF\u5C42\u6784\u5EFA\u4E00\u4E2A\u6570\u636E\u5E27\uFF0C\u76EE\u7684\u5730\u5740\u662FIP\u5C42\u4F20\u8FC7\u6765\u7684MAC\u5730\u5740\uFF0C\u6E90\u5730\u5740\u662F\u672C\u673A\u7684MAC\u5730\u5740\uFF0C\u518D\u9644\u52A0\u4E00\u4E9B\u5FC5\u8981\u7684\u63A7\u5236\u4FE1\u606F\uFF0C\u4F9D\u636E\u4EE5\u592A\u7F51\u7684\u4ECB\u8D28\u8BBF\u95EE\u89C4\u5219\u5C06\u4ED6\u4EEC\u4F20\u9001\u51FA\u53BB</p></li><li><p>\u673A\u5668B\u6536\u5230\u8FD9\u4E2A\u6570\u636E\u5E27\u540E\uFF0C\u5148\u68C0\u67E5\u76EE\u7684\u5730\u5740\uFF0C\u548C\u672C\u673AMAC\u5730\u5740\u5BF9\u6BD4\uFF1A</p></li></ol><p>\u7B26\u5408\uFF0C\u63A5\u53D7\uFF0C\u63A5\u6536\u540E\u68C0\u67E5\u8BE5\u6570\u636E\u5E27\uFF0C\u5C06IP\u6570\u636E\u5305\u4ECE\u5E27\u4E2D\u63D0\u53D6\u51FA\u6765\uFF0C\u4EA4\u7ED9\u672C\u673A\u7684\u7684IP\u5730\u5740\u534F\u8BAE\u5C42\u534F\u8BAE\uFF0CIP\u534F\u8BAE\u5C42\u68C0\u67E5\u4E4B\u540E\uFF0C\u5C06\u6709\u7528\u7684\u4FE1\u606F\u63D0\u53D6\u7ED9ICMP\u534F\u8BAE\uFF0C\u540E\u8005\u5904\u7406\uFF0C\u9A6C\u4E0A\u6784\u5EFA\u4E00\u4E2AICMP\u5E94\u7B54\u5305\uFF0C\u53D1\u9001\u7ED9A\uFF0C\u5176\u8FC7\u7A0B\u548C\u4E3B\u673AA\u53D1\u9001ICMP\u8BF7\u6C42\u5305\u5230B\u7684\u8FC7\u7A0B\u7C7B\u4F3C\uFF0C\u4F46\u4E0D\u7528ARP\u5E7F\u64AD\u6536\u53D6A\u7684\u4FE1\u606F\uFF0C\u56E0\u4E3A\u8BF7\u6C42\u5305\u4E2D\u5DF2\u7ECF\u6709\u8DB3\u591F\u7684\u4FE1\u606F\u7528\u4E8EB\u56DE\u5E94A\u3002</p><p>\u82E5\u4E0D\u7B26\u5408\uFF0C\u4E22\u5F03\u3002</p><p>\u53EF\u4EE5\u77E5\u9053PING\u7684\u8FC7\u7A0B\u5373\u4E00\u6BB5\u53D1\u9001\u62A5\u6587\u548C\u63A5\u53D7\u786E\u8BA4\u62A5\u6587\u7684\u8FC7\u7A0B\uFF0C\u5728\u6765\u56DE\u76F4\u63A5\u53EF\u4EE5\u8BA1\u7B97\u65F6\u5EF6\u3002</p><h3 id="dns" tabindex="-1"><a class="header-anchor" href="#dns" aria-hidden="true">#</a> DNS</h3><p>DNS\u901A\u8FC7\u4E3B\u673A\u540D\uFF0C\u6700\u7EC8\u5F97\u5230\u8BE5\u4E3B\u673A\u540D\u5BF9\u5E94\u7684IP\u5730\u5740\u7684\u8FC7\u7A0B\u53EB\u505A\u57DF\u540D\u89E3\u6790\uFF08\u6216\u4E3B\u673A\u540D\u89E3\u6790\uFF09\u3002</p><p><strong>\u901A\u4FD7\u7684\u8BB2</strong>\uFF0C\u6211\u4EEC\u66F4\u4E60\u60EF\u4E8E\u8BB0\u4F4F\u4E00\u4E2A\u7F51\u7AD9\u7684\u540D\u5B57\uFF0Cwww.baidu.com\uFF0C\u800C\u4E0D\u662F\u8BB0\u4F4F\u5B83\u7684ip\u5730\u5740\uFF0C\u6BD4\u5982\uFF1A167.23.10.2</p><p><strong>\u5DE5\u4F5C\u539F\u7406</strong></p><p>\u5C06\u4E3B\u673A\u57DF\u540D\u8F6C\u6362\u4E3Aip\u5730\u5740\uFF0C\u5C5E\u4E8E\u5E94\u7528\u5C42\u534F\u8BAE\uFF0C\u4F7F\u7528UDP\u4F20\u8F93\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-7d129644-dfa7-4151-ae2f-9f3f084c6be9.png" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-4ed70ed6-ceeb-4761-8fd4-eb2fe092273d.png" alt=""></p><p>\u7B2C\u4E00\u6B65\uFF0C\u5BA2\u6237\u7AEF\u5411\u672C\u5730DNS\u670D\u52A1\u5668\u53D1\u9001\u89E3\u6790\u8BF7\u6C42</p><p>\u7B2C\u4E8C\u6B65\uFF0C\u672C\u5730DNS\u5982\u6709\u76F8\u5E94\u8BB0\u5F55\u4F1A\u76F4\u63A5\u8FD4\u56DE\u7ED3\u679C\u7ED9\u5BA2\u6237\u7AEF\uFF0C\u5982\u6CA1\u6709\u5C31\u5411DNS\u6839\u670D\u52A1\u5668\u53D1\u9001\u8BF7\u6C42</p><p>\u7B2C\u4E09\u6B65,DSN\u6839\u670D\u52A1\u5668\u63A5\u6536\u5230\u8BF7\u6C42\uFF0C\u8FD4\u56DE\u7ED9\u672C\u5730\u670D\u52A1\u5668\u4E00\u4E2A\u6240\u67E5\u8BE2\u57DF\u7684\u4E3B\u57DF\u540D\u670D\u52A1\u5668\u7684\u5730\u5740</p><p>\u7B2C\u56DB\u6B65\uFF0C\u672C\u5730dns\u670D\u52A1\u5668\u518D\u5411\u8FD4\u56DE\u7684\u4E3B\u57DF\u540D\u670D\u52A1\u5668\u5730\u5740\u53D1\u9001\u67E5\u8BE2\u8BF7\u6C42</p><p>\u7B2C\u4E94\u6B65\uFF0C\u4E3B\u57DF\u540D\u670D\u52A1\u5668\u5982\u6709\u8BB0\u5F55\u5C31\u8FD4\u56DE\u7ED3\u679C\uFF0C\u6CA1\u6709\u7684\u8BDD\u8FD4\u56DE\u76F8\u5173\u7684\u4E0B\u7EA7\u57DF\u540D\u670D\u52A1\u5668\u5730\u5740</p><p>\u7B2C\u516D\u6B65\uFF0C\u672C\u5730DNS\u670D\u52A1\u5668\u7EE7\u7EED\u5411\u63A5\u6536\u5230\u7684\u5730\u5740\u8FDB\u884C\u67E5\u8BE2\u8BF7\u6C42</p><p>\u7B2C\u4E03\u6B65\uFF0C\u4E0B\u7EA7\u57DF\u540D\u670D\u52A1\u5668\u6709\u76F8\u5E94\u8BB0\u5F55\uFF0C\u8FD4\u56DE\u7ED3\u679C</p><p>\u7B2C\u516B\u6B65\uFF0C\u672C\u5730dns\u670D\u52A1\u5668\u5C06\u6536\u5230\u7684\u8FD4\u56DE\u5730\u5740\u53D1\u7ED9\u5BA2\u6237\u7AEF\uFF0C\u540C\u65F6\u5199\u5165\u81EA\u5DF1\u7684\u7F13\u5B58\uFF0C\u4EE5\u4FBF\u4E0B\u6B21\u67E5\u8BE2</p><p>DNS\u57DF\u540D\u67E5\u8BE2\u5B9E\u9645\u4E0A\u5C31\u662F\u4E2A\u4E0D\u65AD\u9012\u5F52\u67E5\u8BE2\u7684\u8FC7\u7A0B\uFF0C\u76F4\u5230\u67E5\u627E\u5230\u76F8\u5E94\u7ED3\u679C\uFF0C\u9700\u8981\u6CE8\u610F\u7684\u65F6\uFF0C\u5F53\u627E\u4E0D\u5230\u76F8\u5E94\u8BB0\u5F55\uFF0C\u4F1A\u8FD4\u56DE\u7A7A\u7ED3\u679C\uFF0C\u800C\u4E0D\u662F\u8D85\u65F6\u4FE1\u606F</p><h4 id="dns\u8BB0\u5F55" tabindex="-1"><a class="header-anchor" href="#dns\u8BB0\u5F55" aria-hidden="true">#</a> DNS\u8BB0\u5F55</h4><blockquote><p>A\u8BB0\u5F55</p></blockquote><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>\u5B9A\u4E49www.example.com\u7684ip\u5730\u5740
 www.example.com.     IN     A     139.18.28.5;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><p>\u4E0A\u9762\u7684\u5C31\u662F\u4E00\u6761 DNS \u8BB0\u5F55\uFF0C\u7EAF\u6587\u672C\u5373\u53EF\u3002</p><p><code>www.example.com</code> \u662F\u8981\u89E3\u6790\u7684\u57DF\u540D\u3002</p><p>A \u662F\u8BB0\u5F55\u7684\u7C7B\u578B\uFF0CA \u8BB0\u5F55\u4EE3\u8868\u7740\u8FD9\u662F\u4E00\u6761\u7528\u4E8E\u89E3\u6790 IPv4 \u5730\u5740\u7684\u8BB0\u5F55\u3002</p><p>\u4ECE\u8FD9\u6761\u8BB0\u5F55\u53EF\u77E5\uFF0C<code>www.example.com</code>\u7684 IP \u5730\u5740\u662F 139.18.28.5\u3002</p><blockquote><p>CNAME</p></blockquote><p>CNAME\u7528\u4E8E\u5B9A\u4E49\u57DF\u540D\u7684\u522B\u540D\uFF0C\u5982\u4E0B\u9762\u8FD9\u6761 DNS \u8BB0\u5F55\uFF1A</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>\u5B9A\u4E49www.example.com\u7684\u522B\u540D
 a.example.com.          IN     CNAME   b.example.com.
diff --git a/dist/assets/wangzhe-thread.html.6222c220.js b/dist/assets/wangzhe-thread.html.752a4836.js
similarity index 99%
rename from dist/assets/wangzhe-thread.html.6222c220.js
rename to dist/assets/wangzhe-thread.html.752a4836.js
index ab334879..0c066190 100644
--- a/dist/assets/wangzhe-thread.html.6222c220.js
+++ b/dist/assets/wangzhe-thread.html.752a4836.js
@@ -1,4 +1,4 @@
-import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e as t}from"./app.a0271b9c.js";const p={},e=t(`<h1 id="\u5BA4\u53CB\u6253\u4E86\u4E00\u628A\u738B\u8005\u5C31\u5B66\u4F1A\u4E86\u521B\u5EFAjava\u7EBF\u7A0B\u76843\u79CD\u65B9\u5F0F" tabindex="-1"><a class="header-anchor" href="#\u5BA4\u53CB\u6253\u4E86\u4E00\u628A\u738B\u8005\u5C31\u5B66\u4F1A\u4E86\u521B\u5EFAjava\u7EBF\u7A0B\u76843\u79CD\u65B9\u5F0F" aria-hidden="true">#</a> \u5BA4\u53CB\u6253\u4E86\u4E00\u628A\u738B\u8005\u5C31\u5B66\u4F1A\u4E86\u521B\u5EFAJava\u7EBF\u7A0B\u76843\u79CD\u65B9\u5F0F</h1><p>\u5BF9\u4E8E Java \u521D\u5B66\u8005\u6765\u8BF4\uFF0C\u591A\u7EBF\u7A0B\u7684\u5F88\u591A\u6982\u5FF5\u542C\u8D77\u6765\u5C31\u5F88\u96BE\u7406\u89E3\u3002\u6BD4\u65B9\u8BF4\uFF1A</p><ul><li>\u8FDB\u7A0B\uFF0C\u662F\u5BF9\u8FD0\u884C\u65F6\u7A0B\u5E8F\u7684\u5C01\u88C5\uFF0C\u662F\u7CFB\u7EDF\u8FDB\u884C\u8D44\u6E90\u8C03\u5EA6\u548C\u5206\u914D\u7684\u57FA\u672C\u5355\u4F4D\uFF0C\u5B9E\u73B0\u4E86\u64CD\u4F5C\u7CFB\u7EDF\u7684\u5E76\u53D1\u3002</li><li>\u7EBF\u7A0B\uFF0C\u662F\u8FDB\u7A0B\u7684\u5B50\u4EFB\u52A1\uFF0C\u662FCPU\u8C03\u5EA6\u548C\u5206\u6D3E\u7684\u57FA\u672C\u5355\u4F4D\uFF0C\u5B9E\u73B0\u4E86\u8FDB\u7A0B\u5185\u90E8\u7684\u5E76\u53D1\u3002</li></ul><p>\u5F88\u62BD\u8C61\uFF0C\u5BF9\u4E0D\u5BF9\uFF1F\u6253\u4E2A\u6BD4\u55BB\uFF0C\u4F60\u5728\u6253\u4E00\u628A\u738B\u8005\uFF08\u5176\u5B9E\u6211\u4E0D\u4F1A\u73A9\u54C8doge\uFF09\uFF1A</p><ul><li>\u8FDB\u7A0B\u53EF\u4EE5\u6BD4\u4F5C\u662F\u4F60\u5F00\u7684\u8FD9\u4E00\u628A\u6E38\u620F</li><li>\u7EBF\u7A0B\u53EF\u4EE5\u6BD4\u4F5C\u662F\u4F60\u6240\u9009\u7684\u82F1\u96C4\u6216\u8005\u662F\u6E38\u620F\u4E2D\u7684\u6C34\u6676\u91CE\u602A\u7B49\u4E4B\u7C7B\u7684\u3002</li></ul><p>\u5E26\u7740\u8FD9\u4E2A\u6BD4\u55BB\u6765\u7406\u89E3\u8FDB\u7A0B\u548C\u7EBF\u7A0B\u7684\u4E00\u4E9B\u5173\u7CFB\uFF0C\u4E00\u4E2A\u8FDB\u7A0B\u53EF\u4EE5\u6709\u591A\u4E2A\u7EBF\u7A0B\u5C31\u53EB\u591A\u7EBF\u7A0B\u3002\u662F\u4E0D\u662F\u611F\u89C9\u975E\u5E38\u597D\u7406\u89E3\u4E86\uFF1F</p><p><strong>\u27641\u3001\u7EBF\u7A0B\u5728\u8FDB\u7A0B\u4E0B\u8FDB\u884C</strong></p><p>(\u5355\u72EC\u7684\u82F1\u96C4\u89D2\u8272\u3001\u91CE\u602A\u3001\u5C0F\u5175\u80AF\u5B9A\u4E0D\u80FD\u8FD0\u884C)</p><p><strong>\u27642\u3001\u8FDB\u7A0B\u4E4B\u95F4\u4E0D\u4F1A\u76F8\u4E92\u5F71\u54CD\uFF0C\u4E3B\u7EBF\u7A0B\u7ED3\u675F\u5C06\u4F1A\u5BFC\u81F4\u6574\u4E2A\u8FDB\u7A0B\u7ED3\u675F</strong></p><p>(\u4E24\u628A\u6E38\u620F\u4E4B\u95F4\u4E0D\u4F1A\u6709\u8054\u7CFB\u548C\u5F71\u54CD\u3002\u4F60\u7684\u6C34\u6676\u88AB\u63A8\u6389\uFF0C\u4F60\u8FD9\u628A\u6E38\u620F\u5C31\u7ED3\u675F\u4E86)</p><p><strong>\u27643\u3001\u4E0D\u540C\u7684\u8FDB\u7A0B\u6570\u636E\u5F88\u96BE\u5171\u4EAB</strong></p><p>(\u4E24\u628A\u6E38\u620F\u4E4B\u95F4\u5F88\u96BE\u6709\u8054\u7CFB\uFF0C\u6709\u8054\u7CFB\u7684\u60C5\u51B5\u6BD4\u5982\u4E0A\u628A\u7684\u654C\u4EBA\u8FD9\u628A\u53C8\u5339\u914D\u5230\u4E86)</p><p><strong>\u27644\u3001\u540C\u8FDB\u7A0B\u4E0B\u7684\u4E0D\u540C\u7EBF\u7A0B\u4E4B\u95F4\u6570\u636E\u5F88\u5BB9\u6613\u5171\u4EAB</strong></p><p>(\u4F60\u5F00\u7684\u90A3\u4E00\u628A\u6E38\u620F\uFF0C\u4F60\u53EF\u4EE5\u770B\u5230\u6BCF\u4E2A\u73A9\u5BB6\u7684\u72B6\u6001\u2014\u2014\u751F\u6B7B\uFF0C\u4E5F\u53EF\u4EE5\u770B\u5230\u6BCF\u4E2A\u73A9\u5BB6\u7684\u51FA\u88C5\u7B49\u7B49\uFF09</p><p><strong>\u27645\u3001\u8FDB\u7A0B\u4F7F\u7528\u5185\u5B58\u5730\u5740\u53EF\u4EE5\u9650\u5B9A\u4F7F\u7528\u91CF</strong></p><p>(\u5F00\u7684\u623F\u95F4\u6A21\u5F0F\uFF0C\u51B3\u5B9A\u4E86\u4F60\u53EF\u4EE5\u8BBE\u7F6E\u6709\u591A\u5C11\u4EBA\u8FDB\uFF0C\u5F53\u623F\u95F4\u6EE1\u4E86\u540E\uFF0C\u5176\u4ED6\u4EBA\u5C31\u8FDB\u4E0D\u53BB\u4E86\uFF0C\u9664\u975E\u6709\u4EBA\u9000\u51FA\u623F\u95F4\uFF0C\u5176\u4ED6\u4EBA\u624D\u80FD\u8FDB)</p><p>\u641E\u6E05\u695A\u4E0A\u9762\u8FD9\u4E9B\u6982\u5FF5\u4E4B\u540E\uFF0C\u6211\u4EEC\u6765\u770B\u4E00\u4E0B\u591A\u7EBF\u7A0B\u521B\u5EFA\u7684\u4E24\u79CD\u65B9\u5F0F\uFF1A</p><p>\u2660\u2460\uFF1A\u521B\u5EFA\u4E00\u4E2A\u7C7B\u7EE7\u627FThread\u7C7B\uFF0C\u5E76\u91CD\u5199run\u65B9\u6CD5\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">MyThread</span> <span class="token keyword">extends</span> <span class="token class-name">Thread</span> <span class="token punctuation">{</span>
+import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as s,c as a,e as t}from"./app.615e41d8.js";const p={},e=t(`<h1 id="\u5BA4\u53CB\u6253\u4E86\u4E00\u628A\u738B\u8005\u5C31\u5B66\u4F1A\u4E86\u521B\u5EFAjava\u7EBF\u7A0B\u76843\u79CD\u65B9\u5F0F" tabindex="-1"><a class="header-anchor" href="#\u5BA4\u53CB\u6253\u4E86\u4E00\u628A\u738B\u8005\u5C31\u5B66\u4F1A\u4E86\u521B\u5EFAjava\u7EBF\u7A0B\u76843\u79CD\u65B9\u5F0F" aria-hidden="true">#</a> \u5BA4\u53CB\u6253\u4E86\u4E00\u628A\u738B\u8005\u5C31\u5B66\u4F1A\u4E86\u521B\u5EFAJava\u7EBF\u7A0B\u76843\u79CD\u65B9\u5F0F</h1><p>\u5BF9\u4E8E Java \u521D\u5B66\u8005\u6765\u8BF4\uFF0C\u591A\u7EBF\u7A0B\u7684\u5F88\u591A\u6982\u5FF5\u542C\u8D77\u6765\u5C31\u5F88\u96BE\u7406\u89E3\u3002\u6BD4\u65B9\u8BF4\uFF1A</p><ul><li>\u8FDB\u7A0B\uFF0C\u662F\u5BF9\u8FD0\u884C\u65F6\u7A0B\u5E8F\u7684\u5C01\u88C5\uFF0C\u662F\u7CFB\u7EDF\u8FDB\u884C\u8D44\u6E90\u8C03\u5EA6\u548C\u5206\u914D\u7684\u57FA\u672C\u5355\u4F4D\uFF0C\u5B9E\u73B0\u4E86\u64CD\u4F5C\u7CFB\u7EDF\u7684\u5E76\u53D1\u3002</li><li>\u7EBF\u7A0B\uFF0C\u662F\u8FDB\u7A0B\u7684\u5B50\u4EFB\u52A1\uFF0C\u662FCPU\u8C03\u5EA6\u548C\u5206\u6D3E\u7684\u57FA\u672C\u5355\u4F4D\uFF0C\u5B9E\u73B0\u4E86\u8FDB\u7A0B\u5185\u90E8\u7684\u5E76\u53D1\u3002</li></ul><p>\u5F88\u62BD\u8C61\uFF0C\u5BF9\u4E0D\u5BF9\uFF1F\u6253\u4E2A\u6BD4\u55BB\uFF0C\u4F60\u5728\u6253\u4E00\u628A\u738B\u8005\uFF08\u5176\u5B9E\u6211\u4E0D\u4F1A\u73A9\u54C8doge\uFF09\uFF1A</p><ul><li>\u8FDB\u7A0B\u53EF\u4EE5\u6BD4\u4F5C\u662F\u4F60\u5F00\u7684\u8FD9\u4E00\u628A\u6E38\u620F</li><li>\u7EBF\u7A0B\u53EF\u4EE5\u6BD4\u4F5C\u662F\u4F60\u6240\u9009\u7684\u82F1\u96C4\u6216\u8005\u662F\u6E38\u620F\u4E2D\u7684\u6C34\u6676\u91CE\u602A\u7B49\u4E4B\u7C7B\u7684\u3002</li></ul><p>\u5E26\u7740\u8FD9\u4E2A\u6BD4\u55BB\u6765\u7406\u89E3\u8FDB\u7A0B\u548C\u7EBF\u7A0B\u7684\u4E00\u4E9B\u5173\u7CFB\uFF0C\u4E00\u4E2A\u8FDB\u7A0B\u53EF\u4EE5\u6709\u591A\u4E2A\u7EBF\u7A0B\u5C31\u53EB\u591A\u7EBF\u7A0B\u3002\u662F\u4E0D\u662F\u611F\u89C9\u975E\u5E38\u597D\u7406\u89E3\u4E86\uFF1F</p><p><strong>\u27641\u3001\u7EBF\u7A0B\u5728\u8FDB\u7A0B\u4E0B\u8FDB\u884C</strong></p><p>(\u5355\u72EC\u7684\u82F1\u96C4\u89D2\u8272\u3001\u91CE\u602A\u3001\u5C0F\u5175\u80AF\u5B9A\u4E0D\u80FD\u8FD0\u884C)</p><p><strong>\u27642\u3001\u8FDB\u7A0B\u4E4B\u95F4\u4E0D\u4F1A\u76F8\u4E92\u5F71\u54CD\uFF0C\u4E3B\u7EBF\u7A0B\u7ED3\u675F\u5C06\u4F1A\u5BFC\u81F4\u6574\u4E2A\u8FDB\u7A0B\u7ED3\u675F</strong></p><p>(\u4E24\u628A\u6E38\u620F\u4E4B\u95F4\u4E0D\u4F1A\u6709\u8054\u7CFB\u548C\u5F71\u54CD\u3002\u4F60\u7684\u6C34\u6676\u88AB\u63A8\u6389\uFF0C\u4F60\u8FD9\u628A\u6E38\u620F\u5C31\u7ED3\u675F\u4E86)</p><p><strong>\u27643\u3001\u4E0D\u540C\u7684\u8FDB\u7A0B\u6570\u636E\u5F88\u96BE\u5171\u4EAB</strong></p><p>(\u4E24\u628A\u6E38\u620F\u4E4B\u95F4\u5F88\u96BE\u6709\u8054\u7CFB\uFF0C\u6709\u8054\u7CFB\u7684\u60C5\u51B5\u6BD4\u5982\u4E0A\u628A\u7684\u654C\u4EBA\u8FD9\u628A\u53C8\u5339\u914D\u5230\u4E86)</p><p><strong>\u27644\u3001\u540C\u8FDB\u7A0B\u4E0B\u7684\u4E0D\u540C\u7EBF\u7A0B\u4E4B\u95F4\u6570\u636E\u5F88\u5BB9\u6613\u5171\u4EAB</strong></p><p>(\u4F60\u5F00\u7684\u90A3\u4E00\u628A\u6E38\u620F\uFF0C\u4F60\u53EF\u4EE5\u770B\u5230\u6BCF\u4E2A\u73A9\u5BB6\u7684\u72B6\u6001\u2014\u2014\u751F\u6B7B\uFF0C\u4E5F\u53EF\u4EE5\u770B\u5230\u6BCF\u4E2A\u73A9\u5BB6\u7684\u51FA\u88C5\u7B49\u7B49\uFF09</p><p><strong>\u27645\u3001\u8FDB\u7A0B\u4F7F\u7528\u5185\u5B58\u5730\u5740\u53EF\u4EE5\u9650\u5B9A\u4F7F\u7528\u91CF</strong></p><p>(\u5F00\u7684\u623F\u95F4\u6A21\u5F0F\uFF0C\u51B3\u5B9A\u4E86\u4F60\u53EF\u4EE5\u8BBE\u7F6E\u6709\u591A\u5C11\u4EBA\u8FDB\uFF0C\u5F53\u623F\u95F4\u6EE1\u4E86\u540E\uFF0C\u5176\u4ED6\u4EBA\u5C31\u8FDB\u4E0D\u53BB\u4E86\uFF0C\u9664\u975E\u6709\u4EBA\u9000\u51FA\u623F\u95F4\uFF0C\u5176\u4ED6\u4EBA\u624D\u80FD\u8FDB)</p><p>\u641E\u6E05\u695A\u4E0A\u9762\u8FD9\u4E9B\u6982\u5FF5\u4E4B\u540E\uFF0C\u6211\u4EEC\u6765\u770B\u4E00\u4E0B\u591A\u7EBF\u7A0B\u521B\u5EFA\u7684\u4E24\u79CD\u65B9\u5F0F\uFF1A</p><p>\u2660\u2460\uFF1A\u521B\u5EFA\u4E00\u4E2A\u7C7B\u7EE7\u627FThread\u7C7B\uFF0C\u5E76\u91CD\u5199run\u65B9\u6CD5\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">MyThread</span> <span class="token keyword">extends</span> <span class="token class-name">Thread</span> <span class="token punctuation">{</span>
     <span class="token annotation punctuation">@Override</span>
     <span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">run</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
         <span class="token keyword">for</span> <span class="token punctuation">(</span><span class="token keyword">int</span> i <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span> i <span class="token operator">&lt;</span> <span class="token number">100</span><span class="token punctuation">;</span> i<span class="token operator">++</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
diff --git a/dist/assets/warp.html.f8427955.js b/dist/assets/warp.html.8ae8cc83.js
similarity index 99%
rename from dist/assets/warp.html.f8427955.js
rename to dist/assets/warp.html.8ae8cc83.js
index 31cf1e4b..21debfbf 100644
--- a/dist/assets/warp.html.f8427955.js
+++ b/dist/assets/warp.html.8ae8cc83.js
@@ -1 +1 @@
-import{_ as o}from"./plugin-vue_export-helper.21dcd24c.js";import{r as n,o as c,c as b,a as e,b as r,d as t,e as p}from"./app.a0271b9c.js";const s={},d=e("p",null,"\u7A0B\u5E8F\u5458\u7684\u4E00\u751F\uFF0C\u7528\u7684\u6700\u591A\u7684\u4E24\u4E2A\u5DE5\u5177\uFF0C\u4E00\u4E2A\u662F\u4EE3\u7801\u7F16\u8F91\u5668\uFF08Code Editor\uFF09\uFF0C\u53E6\u5916\u4E00\u4E2A\u5C31\u662F\u547D\u4EE4\u884C\u7EC8\u7AEF\u5DE5\u5177\uFF08Terminal\uFF09\u3002\u8FD9\u4E24\u4E2A\u5DE5\u5177\u5BF9\u4E8E\u63D0\u9AD8\u5F00\u53D1\u6548\u7387\u81F3\u5173\u91CD\u8981\u3002",-1),g=e("p",null,"\u4EE3\u7801\u7F16\u8F91\u5668\u5728\u8FC7\u53BB\u7684 40 \u5E74\u91CC\u4E0D\u65AD\u8FDB\u5316\uFF0C\u4ECE\u6211\u4E0A\u5927\u5B66\u6572 Java \u4EE3\u7801\u5F00\u59CB\uFF0C\u5C31\u7ECF\u5386\u4E86 MyEclipse\u3001NetBeans\u3001Eclipse\uFF0C\u5230\u5982\u4ECA\u79F0\u738B\u79F0\u9738\u7684 Intellij IDEA\u3002",-1),i=e("p",null,"\u4F46\u7EC8\u7AEF\u5DE5\u5177\uFF0C\u57FA\u672C\u4E0A\u548C\u4E0A\u4E2A\u4E16\u7EAA\u4E03\u516B\u5341\u5E74\u4EE3\u5DEE\u4E0D\u591A\u3002",-1),l=e("p",null,"\u90A3\u672C\u671F\u7ED9\u5927\u5BB6\u63A8\u8350\u7684\u8FD9\u6B3E\u7EC8\u7AEF\u2014\u2014Warp\u2014\u2014\u7EDD\u5BF9\u4F1A\u8BA9\u4F60\u5927\u5F00\u773C\u754C\uFF0C\u7528\u5B8C\u7231\u4E0D\u91CA\u624B\uFF01",-1),h=t("\u8FD8\u8BB0\u5F97\u4E4B\u524D\u7ED9\u5927\u5BB6\u63A8\u8350\u7684 "),m={href:"https://mp.weixin.qq.com/s/HeUAPe4LqqjfzIeWDe8KIg",target:"_blank",rel:"noopener noreferrer"},_=t("Tabby"),u=t(" \u5417\uFF1F\u662F\u65F6\u5019\u559C\u65B0\u538C\u65E7\u4E86\u3002"),j=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-e0411889-e506-480f-a719-eba4f2d229b4.png",alt:""})],-1),f=e("p",null,"Warp\uFF0C\u4E00\u4E2A\u8D85\u7EA7\u725B\u53C9\u7684 terminal\uFF0C\u53F7\u79F0\u662F 21 \u4E16\u7EAA\u7684\u7EC8\u7AEF\uFF0C\u8FD8\u672A\u6B63\u5F0F\u53D1\u5E03\uFF0C\u5C31\u83B7\u5F97\u4E86\u4E24\u5343\u4E09\u767E\u4E07\u7F8E\u5143\u7684\u878D\u8D44\u3002",-1),v=t("\u5B98\u65B9\u7F51\u7AD9\uFF1A"),w={href:"https://www.warp.dev/",target:"_blank",rel:"noopener noreferrer"},W=t("https://www.warp.dev/"),k=e("p",null,"Warp \u5728 GitHub \u4E0A\u4E5F\u5DF2\u7ECF\u5F00\u6E90\uFF0C\u76EE\u524D\u5DF2\u7ECF\u6709 2.8k+ \u7684 star \u4E86\u3002",-1),q=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-17a2270c-3bd1-47eb-a205-b7defde42895.png",alt:""})],-1),x=t("GitHub \u5730\u5740\uFF1A"),A={href:"https://github.com/warpdotdev/Warp",target:"_blank",rel:"noopener noreferrer"},E=t("https://github.com/warpdotdev/Warp"),I=e("p",null,"Warp \u53F7\u79F0\u81EA\u5DF1\u201CReinvent the Terminal\u201D\uFF0C\u4E5F\u5C31\u662F\u91CD\u65B0\u5B9A\u4E49\u4E86\u7EC8\u7AEF\uFF0C\u7528\u8FC7 vscode \u7684\u5C0F\u4F19\u4F34\u662F\u4E0D\u662F\u5BF9\u8FD9\u53E5\u53E3\u53F7\u4F3C\u66FE\u76F8\u8BC6\uFF1F",-1),R=e("p",null,"\u662F\u7684\uFF0Cvscode \u53F7\u79F0\u81EA\u5DF1\u201CCode editing Redefined\u201D\uFF0C\u4E5F\u5C31\u662F\u91CD\u65B0\u5B9A\u4E49\u4E86\u4EE3\u7801\u7F16\u8F91\u5668\u3002",-1),C=e("h3",{id:"\u4E00\u3001\u5B89\u88C5-warp",tabindex:"-1"},[e("a",{class:"header-anchor",href:"#\u4E00\u3001\u5B89\u88C5-warp","aria-hidden":"true"},"#"),t(" \u4E00\u3001\u5B89\u88C5 Warp")],-1),H=e("p",null,[t("\u76F4\u63A5\u5230\u5B98\u7F51 "),e("code",null,"warp.dev"),t(" \u70B9\u51FB\u300Cdownload now\u300D\u5C31\u53EF\u4EE5\u4E0B\u8F7D\u6700\u65B0\u7248\u4E86\u3002\u4E0B\u8F7D\u5B8C\u6210\u540E\uFF0C\u53CC\u51FB\u5B89\u88C5\u5305\u5C31\u53EF\u4EE5\u5B89\u88C5\u4E86\u3002\u5B8C\u6210\u540E\u6253\u5F00\uFF0C\u754C\u9762\u8FD8\u662F\u975E\u5E38\u6E05\u723D\u7684\u3002")],-1),N=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-188834c7-70b7-4f9c-a817-b4a691625fd1.png",alt:""})],-1),S=e("p",null,"Warp \u652F\u6301 GitHub \u8D26\u6237\u767B\u5F55\u3002\u4E0D\u8FC7\uFF0C\u5982\u679C\u4F60\u5728\u767B\u5F55\u7684\u8FC7\u7A0B\u4E2D\u56E0\u4E3A\u67D0\u4E9B\u539F\u56E0\u65E0\u6CD5\u5B8C\u6210\u8DF3\u8F6C\uFF0C\u53EF\u4EE5\u901A\u8FC7\u4E0B\u9762\u7684\u94FE\u63A5\u81EA\u884C\u89E3\u51B3\u3002",-1),y={href:"https://embiid.blog/post/WARP-does-not-work-after-submitting-an-invite-code/",target:"_blank",rel:"noopener noreferrer"},B=t("https://embiid.blog/post/WARP-does-not-work-after-submitting-an-invite-code/"),D=p('<p>\u5982\u679C\u987A\u5229\u767B\u5F55\uFF0C\u4F1A\u8DF3\u8F6C\u5230\u8FD9\u4E2A\u9875\u9762\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-84c0b513-57f3-4ab4-8c77-508c10c923c5.png" alt=""></p><p>\u586B\u5199\u4E00\u4E9B Warp \u7684\u8C03\u67E5\u4FE1\u606F\u540E\uFF0C\u5C31\u4F1A\u8DF3\u8F6C\u5230 Warp \u7684\u521D\u59CB\u754C\u9762\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-304639e9-7554-45b4-a199-e7c0c3b40c33.png" alt=""></p><blockquote><p>\u9700\u8981\u6CE8\u610F\u7684\u662F\uFF0CWarp \u76EE\u524D\u4EC5\u652F\u6301 macOS \u7248\uFF0CLinux \u548C Windows \u7528\u6237\u8FD8\u9700\u8981\u7B49\u5F85\u4E00\u6BB5\u65F6\u95F4\u3002</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-a4d43a50-0ad9-4f91-ad4e-c1c0788bb580.png" alt=""></p><p>\u5176\u5B9E macOS \u7248\u4E5F\u662F\u521A\u521A\u516C\u6D4B\uFF0C\u6211\u8FD9\u4EFD\u653B\u7565\u7EDD\u58C1\u662F\u70ED\u4E4E\u4E4E\u7684\u3002\u60F3\u8981\u7B2C\u4E00\u65F6\u95F4\u5173\u6CE8 Warp \u7248\u672C\u4FE1\u606F\u7684\u8BDD\uFF0C\u53EF\u4EE5\u6233\u4E0B\u56FE\u4E2D\u63D0\u5230\u7684\u94FE\u63A5\u586B\u5199\u81EA\u5DF1\u7684\u90AE\u7BB1\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-f622d505-b136-4b9d-95c5-a6872e1423e1.png" alt=""></p><h3 id="\u4E8C\u3001\u4F7F\u7528-warp" tabindex="-1"><a class="header-anchor" href="#\u4E8C\u3001\u4F7F\u7528-warp" aria-hidden="true">#</a> \u4E8C\u3001\u4F7F\u7528 Warp</h3><p>Warp \u89E3\u51B3\u7684\u7B2C\u4E00\u4E2A\u75DB\u70B9\uFF0C\u5C31\u662F\u51CF\u5C11\u914D\u7F6E\u3001\u65B9\u4FBF\u8F93\u5165\u3001\u4F18\u5316\u8F93\u51FA\uFF0C\u5E76\u4E14\u589E\u52A0\u5E38\u7528\u547D\u4EE4\u7684\u81EA\u52A8\u63D0\u793A\u3002</p><p><strong>1\uFF09\u667A\u80FD\u63D0\u793A</strong></p><p>\u666E\u901A\u7684\u7EC8\u7AEF\u5728\u4F60\u952E\u5165 tab \u7684\u65F6\u5019\uFF0C\u662F\u8FD9\u6837\u63D0\u793A\u7684\uFF0C\u5C31\u662F\u7B80\u5355\u5730\u5E2E\u4F60\u7F57\u5217\u4E0B\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-078017c6-a872-466a-8aa2-f202c9371493.png" alt=""></p><p>\u800C Warp \u5C31\u975E\u5E38\u7684\u65F6\u9AE6\uFF0C\u4F1A\u7ED9\u4F60\u6EDA\u52A8\u53EF\u9009\u7684\u5217\u8868\u5F62\u5F0F\u5C55\u793A\u51FA\u6765\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-4e205289-d8c4-49a9-90ba-08aef8beb627.png" alt=""></p><p>Warp \u7684\u667A\u80FD\u63D0\u793A\u4E5F\u66F4\u52A0\u201C\u667A\u80FD\u5316\u201D\uFF0C\u5B83\u4F1A\u731C\u6D4B\u4F60\u4E0B\u4E00\u6B65\u7684\u547D\u4EE4\u5230\u5E95\u8F93\u5165\u4EC0\u4E48\u3002</p><p>\u6BD4\u5982\u8BF4\u6211\u7684\u5DE5\u4F5C\u76EE\u5F55\u4E0B\u6709\u4E00\u4E2A README.md \u7684\u6587\u4EF6\uFF0C\u90A3\u5F53\u6211\u8F93\u5165 <code>echo &#39;\u6C89\u9ED8\u738B\u4E8C&#39; &gt;&gt;</code>\u7684\u65F6\u5019\u5B83\u4F1A\u628A <code>README.md</code> \u63D0\u793A\u5728\u540E\u9762\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-8948ab59-3ce8-4b04-80a5-ecd7663e1034.png" alt=""></p><p><strong>2\uFF09\u667A\u80FD\u8BB0\u5FC6</strong></p><p>Warp \u4F1A\u8BB0\u5F55\u4E0A\u4E00\u6B21\u6267\u884C\u7684\u547D\u4EE4\uFF0C\u5728\u9876\u90E8\u4F1A\u6709\u4E00\u4E2A\u63D0\u793A\u7684\u6309\u94AE\uFF0C\u5F53\u4F60\u70B9\u51FB\u7684\u65F6\u5019\uFF0C\u5B83\u4F1A\u81EA\u52A8\u6EDA\u52A8\u5230\u4E0A\u4E00\u4E2A\u547D\u4EE4\u6267\u884C\u7684\u4F4D\u7F6E\u3002</p><p>\u70B9\u51FB\u300Cclear\u300D\u4E4B\u524D\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-6055bfaa-a146-4cf8-a6f4-aa493dbfa60b.png" alt=""></p><p>\u70B9\u51FB\u300Cclear\u300D\u4E4B\u540E\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-181dff97-bd6f-4c41-94c8-8e9ac5567460.png" alt=""></p><p><strong>3\uFF09\u533A\u57DF\u9009\u62E9</strong></p><p>\u4F20\u7EDF\u7684\u7EC8\u7AEF\uFF0C\u5728\u590D\u5236\u533A\u57DF\u547D\u4EE4\u548C\u8F93\u51FA\u7ED3\u679C\u7684\u65F6\u5019\u9700\u8981\u5168\u90E8\u624B\u52A8\u9009\u62E9\uFF0C\u800C Warp \u662F\u53EF\u4EE5\u70B9\u9009\u7684\uFF0C\u4E4B\u540E\u53EF\u4EE5\u901A\u8FC7\u53F3\u952E\u83DC\u5355\u8FDB\u884C\u590D\u5236\u7C98\u8D34\uFF08\u53EF\u4EE5\u9009\u62E9\u53EA\u590D\u5236\u547D\u4EE4\u6216\u8005\u8F93\u51FA\uFF0C\u4E5F\u53EF\u4EE5\u90FD\u9009\uFF09\uFF0C\u975E\u5E38\u65B9\u4FBF\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-23c0a936-2371-4cf4-acf1-555bceecac44.png" alt=""></p><p><strong>4\uFF09\u5386\u53F2\u547D\u4EE4</strong></p><p>\u4F20\u7EDF\u7684\u7EC8\u7AEF\u5728\u901A\u8FC7 up-down \u952E\u9009\u62E9\u5386\u53F2\u547D\u4EE4\u7684\u65F6\u5019\uFF0C\u4E00\u6B21\u53EA\u80FD\u63D0\u793A\u4E00\u4E2A\u547D\u4EE4\u3002\u800C Warp \u4F1A\u628A\u5386\u53F2\u547D\u4EE4\u505A\u6210\u4E00\u4E2A\u6EDA\u52A8\u7684\u53EF\u4EE5\u9009\u62E9\u7684\u5217\u8868\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-da43dca3-d8d1-43ad-9308-f8ec1c2b871b.png" alt=""></p><p><strong>5\uFF09\u547D\u4EE4\u5BFC\u822A</strong></p><p>\u540C\u65F6\u6309\u4E0B Ctrl+Shift+R \u53EF\u4EE5\u6253\u5F00\u547D\u4EE4\u5BFC\u822A\uFF0CWarp \u96C6\u6210\u4E86\u5F88\u591A\u5DE5\u5177\u7684\u547D\u4EE4\u5BFC\u822A\u3002\u6BD4\u5982\u8BF4\u6211\u4EEC\u8981\u6267\u884C <code>git reset</code> \u547D\u4EE4\uFF0C\u90A3\u4E48\u5230\u5E95\u683C\u5F0F\u4EC0\u4E48\uFF0C\u5E94\u8BE5\u600E\u4E48\u6267\u884C\uFF0CWarp \u90FD\u63D0\u793A\u7684\u975E\u5E38\u5230\u4F4D\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-b9a4fd3f-24b2-4f6a-8a70-58fa1b313df3.png" alt=""></p><p>\u8FD9\u8BA9\u6211\u60F3\u8D77\u4E86 macOS \u7684\u6548\u7387\u5DE5\u5177 Alfred\uFF0C\u53EF\u4EE5\u641C\u7D22\u4EFB\u4F55\u4F60\u60F3\u8981\u7684\u547D\u4EE4\u3002</p><p><strong>6\uFF09AI \u690D\u5165</strong></p><p>Warp \u8FD8\u63D0\u4F9B\u4E86 AI \u667A\u80FD\u641C\u7D22\uFF0C\u5FEB\u6377\u952E\u53EF\u4EE5\u5728 setting\u2192keyboard shortcuts \u4E2D\u627E\u5F97\u5230\uFF0C\u952E\u5165 AI \u5173\u952E\u5B57\u5373\u53EF\u3002</p><p>\u53EF\u8C03\u6574\u4E3A\u81EA\u5DF1\u559C\u6B22\u7684\u5FEB\u6377\u952E\u3002\u6211\u76EE\u524D\u8BBE\u7F6E\u7684\u662F <code>Ctrl+shift+&gt;</code>\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-04300bc5-5d0d-494b-955c-1d270133227a.png" alt=""></p><p>\u6BD4\u5982\u8BF4\u6211\u95EE\u5B83\u201Chow many lines were changed in the last 2 commits?\u201D</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-871e51e9-c2ac-4ecb-bfcb-ff339f05bd61.png" alt=""></p><p>Warp \u89E3\u51B3\u7684\u7B2C\u4E8C\u4E2A\u75DB\u70B9\u662F\u589E\u52A0\u534F\u4F5C\u529F\u80FD\u3002\u4E0D\u8FC7\u7531\u4E8E\u6211\u76EE\u524D\u6CA1\u6709\u9080\u8BF7\u5176\u4ED6\u7528\u6237\u53C2\u4E0E\uFF0C\u8FD8\u65E0\u6CD5\u4F7F\u7528\u5171\u4EAB\u529F\u80FD\uFF0C\u540E\u9762\u6709\u5C0F\u4F19\u4F34\u4F53\u9A8C\u7684\u8BDD\uFF0C\u53EF\u4EE5\u901A\u8FC7\u6211\u5206\u4EAB\u7684\u94FE\u63A5\u4E0B\u8F7D\u8BD5\u4E00\u6CE2\u3002</p><blockquote><p>https://app.warp.dev/referral/25KR3Y</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-d8952a84-a0a7-4c3d-b237-87cdc997bb4c.png" alt=""></p><h3 id="\u4E09\u3001\u914D\u7F6E-warp" tabindex="-1"><a class="header-anchor" href="#\u4E09\u3001\u914D\u7F6E-warp" aria-hidden="true">#</a> \u4E09\u3001\u914D\u7F6E Warp</h3><p>\u8F93\u5165 Command+P \u5FEB\u6377\u952E\u53EF\u4EE5\u6253\u5F00 Warp \u7684\u547D\u4EE4\u9762\u677F\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-369d16f6-f897-4c9f-bbea-631d561e145b.png" alt=""></p><p>\u952E\u5165 <code>sett</code> \u5173\u952E\u5B57\u5C31\u53EF\u4EE5\u6253\u5F00\u914D\u7F6E\u9875\u3002</p><p>\u6BD4\u5982\u8BF4\u5728\u300CAppearance\u300D\u9009\u9879\u5361\u91CC\u53EF\u4EE5\u8BBE\u7F6E Warp \u7684\u4E3B\u9898\u3001\u5B57\u4F53\uFF0C\u4EE5\u53CA\u7D27\u51D1\u578B\u6A21\u5F0F\u3002</p><p>\u5927\u6982\u6709\u5341\u591A\u79CD\u4E3B\u9898\u53EF\u9009\uFF0C\u6BD4\u5982\u8BF4\u8FD9\u4E2A\u5973\u751F\u975E\u5E38\u559C\u6B22\u7684\u7C89\u8272\u7CFB\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-6b5dbf4c-7bb0-4926-b9e9-b64333cc2ed8.png" alt=""></p><p>\u66F4\u591A\u4E3B\u9898\u53EF\u4EE5\u5230 GitHub \u4ED3\u5E93\u7684 theme \u9875\u3002</p>',51),G={href:"https://github.com/warpdotdev/themes",target:"_blank",rel:"noopener 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c(),b("div",null,[d,g,i,l,e("blockquote",null,[e("p",null,[h,e("a",m,[_,r(a)]),u])]),j,f,e("blockquote",null,[e("p",null,[v,e("a",w,[W,r(a)])])]),k,q,e("blockquote",null,[e("p",null,[x,e("a",A,[E,r(a)])])]),I,R,C,H,N,S,e("blockquote",null,[e("p",null,[e("a",y,[B,r(a)])])]),D,e("blockquote",null,[e("p",null,[e("a",G,[L,r(a)])])]),P])}var K=o(s,[["render",T],["__file","warp.html.vue"]]);export{K as default};
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now\u300D\u5C31\u53EF\u4EE5\u4E0B\u8F7D\u6700\u65B0\u7248\u4E86\u3002\u4E0B\u8F7D\u5B8C\u6210\u540E\uFF0C\u53CC\u51FB\u5B89\u88C5\u5305\u5C31\u53EF\u4EE5\u5B89\u88C5\u4E86\u3002\u5B8C\u6210\u540E\u6253\u5F00\uFF0C\u754C\u9762\u8FD8\u662F\u975E\u5E38\u6E05\u723D\u7684\u3002")],-1),N=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-188834c7-70b7-4f9c-a817-b4a691625fd1.png",alt:""})],-1),S=e("p",null,"Warp \u652F\u6301 GitHub \u8D26\u6237\u767B\u5F55\u3002\u4E0D\u8FC7\uFF0C\u5982\u679C\u4F60\u5728\u767B\u5F55\u7684\u8FC7\u7A0B\u4E2D\u56E0\u4E3A\u67D0\u4E9B\u539F\u56E0\u65E0\u6CD5\u5B8C\u6210\u8DF3\u8F6C\uFF0C\u53EF\u4EE5\u901A\u8FC7\u4E0B\u9762\u7684\u94FE\u63A5\u81EA\u884C\u89E3\u51B3\u3002",-1),y={href:"https://embiid.blog/post/WARP-does-not-work-after-submitting-an-invite-code/",target:"_blank",rel:"noopener noreferrer"},B=t("https://embiid.blog/post/WARP-does-not-work-after-submitting-an-invite-code/"),D=p('<p>\u5982\u679C\u987A\u5229\u767B\u5F55\uFF0C\u4F1A\u8DF3\u8F6C\u5230\u8FD9\u4E2A\u9875\u9762\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-84c0b513-57f3-4ab4-8c77-508c10c923c5.png" alt=""></p><p>\u586B\u5199\u4E00\u4E9B Warp \u7684\u8C03\u67E5\u4FE1\u606F\u540E\uFF0C\u5C31\u4F1A\u8DF3\u8F6C\u5230 Warp \u7684\u521D\u59CB\u754C\u9762\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-304639e9-7554-45b4-a199-e7c0c3b40c33.png" alt=""></p><blockquote><p>\u9700\u8981\u6CE8\u610F\u7684\u662F\uFF0CWarp \u76EE\u524D\u4EC5\u652F\u6301 macOS \u7248\uFF0CLinux \u548C Windows \u7528\u6237\u8FD8\u9700\u8981\u7B49\u5F85\u4E00\u6BB5\u65F6\u95F4\u3002</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-a4d43a50-0ad9-4f91-ad4e-c1c0788bb580.png" alt=""></p><p>\u5176\u5B9E macOS 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\u89E3\u51B3\u7684\u7B2C\u4E00\u4E2A\u75DB\u70B9\uFF0C\u5C31\u662F\u51CF\u5C11\u914D\u7F6E\u3001\u65B9\u4FBF\u8F93\u5165\u3001\u4F18\u5316\u8F93\u51FA\uFF0C\u5E76\u4E14\u589E\u52A0\u5E38\u7528\u547D\u4EE4\u7684\u81EA\u52A8\u63D0\u793A\u3002</p><p><strong>1\uFF09\u667A\u80FD\u63D0\u793A</strong></p><p>\u666E\u901A\u7684\u7EC8\u7AEF\u5728\u4F60\u952E\u5165 tab \u7684\u65F6\u5019\uFF0C\u662F\u8FD9\u6837\u63D0\u793A\u7684\uFF0C\u5C31\u662F\u7B80\u5355\u5730\u5E2E\u4F60\u7F57\u5217\u4E0B\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-078017c6-a872-466a-8aa2-f202c9371493.png" alt=""></p><p>\u800C Warp \u5C31\u975E\u5E38\u7684\u65F6\u9AE6\uFF0C\u4F1A\u7ED9\u4F60\u6EDA\u52A8\u53EF\u9009\u7684\u5217\u8868\u5F62\u5F0F\u5C55\u793A\u51FA\u6765\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-4e205289-d8c4-49a9-90ba-08aef8beb627.png" alt=""></p><p>Warp \u7684\u667A\u80FD\u63D0\u793A\u4E5F\u66F4\u52A0\u201C\u667A\u80FD\u5316\u201D\uFF0C\u5B83\u4F1A\u731C\u6D4B\u4F60\u4E0B\u4E00\u6B65\u7684\u547D\u4EE4\u5230\u5E95\u8F93\u5165\u4EC0\u4E48\u3002</p><p>\u6BD4\u5982\u8BF4\u6211\u7684\u5DE5\u4F5C\u76EE\u5F55\u4E0B\u6709\u4E00\u4E2A README.md \u7684\u6587\u4EF6\uFF0C\u90A3\u5F53\u6211\u8F93\u5165 <code>echo &#39;\u6C89\u9ED8\u738B\u4E8C&#39; &gt;&gt;</code>\u7684\u65F6\u5019\u5B83\u4F1A\u628A <code>README.md</code> \u63D0\u793A\u5728\u540E\u9762\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-8948ab59-3ce8-4b04-80a5-ecd7663e1034.png" alt=""></p><p><strong>2\uFF09\u667A\u80FD\u8BB0\u5FC6</strong></p><p>Warp \u4F1A\u8BB0\u5F55\u4E0A\u4E00\u6B21\u6267\u884C\u7684\u547D\u4EE4\uFF0C\u5728\u9876\u90E8\u4F1A\u6709\u4E00\u4E2A\u63D0\u793A\u7684\u6309\u94AE\uFF0C\u5F53\u4F60\u70B9\u51FB\u7684\u65F6\u5019\uFF0C\u5B83\u4F1A\u81EA\u52A8\u6EDA\u52A8\u5230\u4E0A\u4E00\u4E2A\u547D\u4EE4\u6267\u884C\u7684\u4F4D\u7F6E\u3002</p><p>\u70B9\u51FB\u300Cclear\u300D\u4E4B\u524D\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-6055bfaa-a146-4cf8-a6f4-aa493dbfa60b.png" alt=""></p><p>\u70B9\u51FB\u300Cclear\u300D\u4E4B\u540E\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-181dff97-bd6f-4c41-94c8-8e9ac5567460.png" alt=""></p><p><strong>3\uFF09\u533A\u57DF\u9009\u62E9</strong></p><p>\u4F20\u7EDF\u7684\u7EC8\u7AEF\uFF0C\u5728\u590D\u5236\u533A\u57DF\u547D\u4EE4\u548C\u8F93\u51FA\u7ED3\u679C\u7684\u65F6\u5019\u9700\u8981\u5168\u90E8\u624B\u52A8\u9009\u62E9\uFF0C\u800C Warp \u662F\u53EF\u4EE5\u70B9\u9009\u7684\uFF0C\u4E4B\u540E\u53EF\u4EE5\u901A\u8FC7\u53F3\u952E\u83DC\u5355\u8FDB\u884C\u590D\u5236\u7C98\u8D34\uFF08\u53EF\u4EE5\u9009\u62E9\u53EA\u590D\u5236\u547D\u4EE4\u6216\u8005\u8F93\u51FA\uFF0C\u4E5F\u53EF\u4EE5\u90FD\u9009\uFF09\uFF0C\u975E\u5E38\u65B9\u4FBF\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-23c0a936-2371-4cf4-acf1-555bceecac44.png" alt=""></p><p><strong>4\uFF09\u5386\u53F2\u547D\u4EE4</strong></p><p>\u4F20\u7EDF\u7684\u7EC8\u7AEF\u5728\u901A\u8FC7 up-down \u952E\u9009\u62E9\u5386\u53F2\u547D\u4EE4\u7684\u65F6\u5019\uFF0C\u4E00\u6B21\u53EA\u80FD\u63D0\u793A\u4E00\u4E2A\u547D\u4EE4\u3002\u800C Warp \u4F1A\u628A\u5386\u53F2\u547D\u4EE4\u505A\u6210\u4E00\u4E2A\u6EDA\u52A8\u7684\u53EF\u4EE5\u9009\u62E9\u7684\u5217\u8868\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-da43dca3-d8d1-43ad-9308-f8ec1c2b871b.png" alt=""></p><p><strong>5\uFF09\u547D\u4EE4\u5BFC\u822A</strong></p><p>\u540C\u65F6\u6309\u4E0B Ctrl+Shift+R \u53EF\u4EE5\u6253\u5F00\u547D\u4EE4\u5BFC\u822A\uFF0CWarp \u96C6\u6210\u4E86\u5F88\u591A\u5DE5\u5177\u7684\u547D\u4EE4\u5BFC\u822A\u3002\u6BD4\u5982\u8BF4\u6211\u4EEC\u8981\u6267\u884C <code>git reset</code> \u547D\u4EE4\uFF0C\u90A3\u4E48\u5230\u5E95\u683C\u5F0F\u4EC0\u4E48\uFF0C\u5E94\u8BE5\u600E\u4E48\u6267\u884C\uFF0CWarp \u90FD\u63D0\u793A\u7684\u975E\u5E38\u5230\u4F4D\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-b9a4fd3f-24b2-4f6a-8a70-58fa1b313df3.png" alt=""></p><p>\u8FD9\u8BA9\u6211\u60F3\u8D77\u4E86 macOS \u7684\u6548\u7387\u5DE5\u5177 Alfred\uFF0C\u53EF\u4EE5\u641C\u7D22\u4EFB\u4F55\u4F60\u60F3\u8981\u7684\u547D\u4EE4\u3002</p><p><strong>6\uFF09AI \u690D\u5165</strong></p><p>Warp \u8FD8\u63D0\u4F9B\u4E86 AI \u667A\u80FD\u641C\u7D22\uFF0C\u5FEB\u6377\u952E\u53EF\u4EE5\u5728 setting\u2192keyboard shortcuts \u4E2D\u627E\u5F97\u5230\uFF0C\u952E\u5165 AI \u5173\u952E\u5B57\u5373\u53EF\u3002</p><p>\u53EF\u8C03\u6574\u4E3A\u81EA\u5DF1\u559C\u6B22\u7684\u5FEB\u6377\u952E\u3002\u6211\u76EE\u524D\u8BBE\u7F6E\u7684\u662F <code>Ctrl+shift+&gt;</code>\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-04300bc5-5d0d-494b-955c-1d270133227a.png" alt=""></p><p>\u6BD4\u5982\u8BF4\u6211\u95EE\u5B83\u201Chow many lines were changed in the last 2 commits?\u201D</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-871e51e9-c2ac-4ecb-bfcb-ff339f05bd61.png" alt=""></p><p>Warp \u89E3\u51B3\u7684\u7B2C\u4E8C\u4E2A\u75DB\u70B9\u662F\u589E\u52A0\u534F\u4F5C\u529F\u80FD\u3002\u4E0D\u8FC7\u7531\u4E8E\u6211\u76EE\u524D\u6CA1\u6709\u9080\u8BF7\u5176\u4ED6\u7528\u6237\u53C2\u4E0E\uFF0C\u8FD8\u65E0\u6CD5\u4F7F\u7528\u5171\u4EAB\u529F\u80FD\uFF0C\u540E\u9762\u6709\u5C0F\u4F19\u4F34\u4F53\u9A8C\u7684\u8BDD\uFF0C\u53EF\u4EE5\u901A\u8FC7\u6211\u5206\u4EAB\u7684\u94FE\u63A5\u4E0B\u8F7D\u8BD5\u4E00\u6CE2\u3002</p><blockquote><p>https://app.warp.dev/referral/25KR3Y</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-d8952a84-a0a7-4c3d-b237-87cdc997bb4c.png" alt=""></p><h3 id="\u4E09\u3001\u914D\u7F6E-warp" tabindex="-1"><a class="header-anchor" href="#\u4E09\u3001\u914D\u7F6E-warp" aria-hidden="true">#</a> \u4E09\u3001\u914D\u7F6E Warp</h3><p>\u8F93\u5165 Command+P \u5FEB\u6377\u952E\u53EF\u4EE5\u6253\u5F00 Warp \u7684\u547D\u4EE4\u9762\u677F\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-369d16f6-f897-4c9f-bbea-631d561e145b.png" alt=""></p><p>\u952E\u5165 <code>sett</code> \u5173\u952E\u5B57\u5C31\u53EF\u4EE5\u6253\u5F00\u914D\u7F6E\u9875\u3002</p><p>\u6BD4\u5982\u8BF4\u5728\u300CAppearance\u300D\u9009\u9879\u5361\u91CC\u53EF\u4EE5\u8BBE\u7F6E Warp \u7684\u4E3B\u9898\u3001\u5B57\u4F53\uFF0C\u4EE5\u53CA\u7D27\u51D1\u578B\u6A21\u5F0F\u3002</p><p>\u5927\u6982\u6709\u5341\u591A\u79CD\u4E3B\u9898\u53EF\u9009\uFF0C\u6BD4\u5982\u8BF4\u8FD9\u4E2A\u5973\u751F\u975E\u5E38\u559C\u6B22\u7684\u7C89\u8272\u7CFB\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-6b5dbf4c-7bb0-4926-b9e9-b64333cc2ed8.png" alt=""></p><p>\u66F4\u591A\u4E3B\u9898\u53EF\u4EE5\u5230 GitHub \u4ED3\u5E93\u7684 theme \u9875\u3002</p>',51),G={href:"https://github.com/warpdotdev/themes",target:"_blank",rel:"noopener noreferrer"},L=t("https://github.com/warpdotdev/themes"),P=p('<p>\u81F3\u4E8E\u5FEB\u6377\u952E\u914D\u7F6E\uFF0C\u5982\u679C\u4E0D\u786E\u5B9A\u6709\u54EA\u4E9B\u5FEB\u6377\u952E\u53EF\u4EE5\u5C1D\u8BD5\uFF0C\u76F4\u63A5\u70B9\u51FB Warp \u9876\u90E8\u7684\u8FD9\u4E2A\u6E29\u99A8\u63D0\u793A\u300Cwelcome tips\u300D\u5C31\u53EF\u4EE5\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-aa785da8-bb39-4851-97f5-b7f8baaccf34.png" alt=""></p><h3 id="\u56DB\u3001\u603B\u7ED3" tabindex="-1"><a class="header-anchor" href="#\u56DB\u3001\u603B\u7ED3" aria-hidden="true">#</a> \u56DB\u3001\u603B\u7ED3</h3><p>\u6700\u540E\u603B\u7ED3\u4E00\u6CE2\u5427\u3002</p><p>\u8FD9\u6CE2\u7740\u5B9E\u5C5E\u4E8E\u5C1D\u9C9C\u4E86\uFF0C\u5E02\u9762\u4E0A\u5E94\u8BE5\u8FD8\u6728\u6709 Warp 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diff --git a/dist/assets/weixin-bagwpdf.html.a32b4b3a.js b/dist/assets/weixin-bagwpdf.html.a32b4b3a.js
new file mode 100644
index 00000000..76841594
--- /dev/null
+++ b/dist/assets/weixin-bagwpdf.html.a32b4b3a.js
@@ -0,0 +1 @@
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diff --git a/dist/assets/weixin-bagwpdf.html.e485fe14.js b/dist/assets/weixin-bagwpdf.html.e485fe14.js
new file mode 100644
index 00000000..59a3b564
--- /dev/null
+++ b/dist/assets/weixin-bagwpdf.html.e485fe14.js
@@ -0,0 +1 @@
+import{_ as e}from"./plugin-vue_export-helper.21dcd24c.js";import{o as t,c as a,e as r}from"./app.615e41d8.js";const p={},c=r('<p>\u5927\u5BB6\u597D\uFF0C\u6211\u662F\u4E8C\u54E5\u5440!\u5206\u4EAB\u4E00\u4E0B\u4ECA\u5929\u6574\u7406\u6C47\u603B\u7684\u4E00\u4E9B Java \u9762\u8BD5\u76F8\u5173\u7684 PDF \u8D44\u6599\uFF0C\u5E0C\u671B\u5BF9\u9700\u8981\u7684\u5C0F\u4F19\u4F34\u6709\u5E2E\u52A9\uFF01</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/weixin-bagwpdf-b411f6ba-0ac3-427f-b409-eade6fc8c98f.jpg" alt=""></p><p><strong>\u5927\u5BB6\u53EF\u4EE5\u626B\u63CF\u4E0B\u65B9\u7684\u4E8C\u7EF4\u7801\u53D1\u9001\u5173\u952E\u5B57\u300C<strong>00</strong>\u300D\u83B7\u53D6\u4E0B\u8F7D\u94FE\u63A5\u3002</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/weixin-bagwpdf-923def51-e371-4376-922e-ca1cead7cafa.jpg" alt=""></p><p><strong>\u4E5F\u53EF\u4EE5\u76F4\u63A5\u5FAE\u4FE1\u641C\u7D22\u300C\u6C89\u9ED8\u738B\u4E8C\u300D\u5173\u6CE8\u540E\u56DE\u590D\u301000\u3011</strong></p><p><strong>1\u3001\u300AJavaGuide \u9762\u8BD5\u7A81\u51FB\u6700\u65B0\u7248\u300B</strong></p><p>Github 110k+ star \u5F00\u6E90\u9879\u76EE JavaGuide \u7684\u9762\u8BD5\u7248\u672C\uFF0C\u6DB5\u76D6 Java \u57FA\u7840\u3001Java \u5E76\u53D1\u3001JVM\u3001\u8BA1\u7B97\u673A\u57FA\u7840\u3001\u6570\u636E\u5E93\u3001\u5E38\u7528\u6846\u67B6\uFF08Spring\u3001MyBatis\u3001Netty \u7B49\u7B49\uFF09\u3001\u7CFB\u7EDF\u8BBE\u8BA1\u3001\u5927\u5382\u9762\u7ECF\u7B49\u5185\u5BB9\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/weixin-bagwpdf-f8b37afc-e992-4178-a4f4-0180c260cbf6.jpg" alt=""></p><p><strong>2\u3001\u300AJava \u5DE5\u7A0B\u5E08\u8FDB\u9636\u77E5\u8BC6\u5B8C\u5168\u626B\u76F2\u300B</strong></p><p>Github \u6807\u661F 58k+ star \u5F00\u6E90\u9879\u76EE\u7684 PDF \u7248\u672C\uFF0C\u6DB5\u76D6\u6D88\u606F\u961F\u5217\u3001\u641C\u7D22\u5F15\u64CE\u3001\u7F13\u5B58\u3001\u5206\u5E93\u5206\u8868\u3001\u8BFB\u5199\u5206\u79BB\u3001\u5206\u5E03\u5F0F\u4E8B\u52A1\u3001\u7194\u65AD\u9650\u6D41\u3001\u5FAE\u670D\u52A1\u7B49\u5185\u5BB9\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/weixin-bagwpdf-56268b0c-ab69-4b3d-84f8-b87e5c0a3eb3.jpg" alt=""></p><p><strong>3\u3001\u300AJava \u9762\u8BD5\u8D44\u6599\u300B</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/weixin-bagwpdf-993c9095-0d9f-467b-81cc-d5593c9c913b.jpg" alt=""></p><p><strong>4\u3001\u300A\u5206\u5E03\u5F0F\u76F8\u5173\u9762\u8BD5\u9898\u6C47\u603B\u300B</strong></p><p>\u8FD9\u662F\u4E00\u4EFD\u4E13\u95E8\u8BB2\u5206\u5E03\u5F0F\u4E8B\u52A1\u7684\u6587\u6863\uFF0C\u5185\u5BB9\u975E\u5E38\u5168\u9762\uFF0C\u4E00\u5171 141 \u9875\uFF0C\u57FA\u672C\u628A\u5206\u5E03\u5F0F\u4E8B\u52A1\u6BD4\u8F83\u91CD\u8981\u7684\u77E5\u8BC6\u70B9\u548C\u9762\u8BD5\u9898\u90FD\u6982\u62EC\u5230\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/weixin-bagwpdf-f146da20-7a6e-47d1-9127-c695c4d90ade.jpg" alt=""></p><p><strong><strong>5\u3001\u300AJava \u516B\u80A1\u6587\u300B113 \u9053\uFF0C\u80CC\u8BF5\u7248</strong></strong></p><p><strong><strong>\u6211\u603B\u7ED3\u51FA\u6765\u7684\u8FD9\u4EFD Java \u516B\u80A1\u6587\uFF0C\u5171\u8BA1 113 \u9053\uFF0C\u5305\u62EC Java \u57FA\u7840\u3001Java \u5E76\u53D1\u7F16\u7A0B\u3001Java \u865A\u62DF\u673A\u4E09\u5927\u90E8\u5206\uFF0C\u5168\u90FD\u662F\u9AD8\u9891\u9762\u8BD5\u9898\uFF0C\u201C\u540A\u6253\u201D\u9762\u8BD5\u5B98\u7EDD\u4E0D\u662F\u95EE\u9898\u3002</strong></strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/weixin-bagwpdf-3a052917-d818-4da8-9d85-f225e19b6afa.jpg" alt=""></p><p><strong>\u5982\u4F55\u83B7\u53D6\uFF1F</strong></p><p><strong>\u76F4\u63A5\u957F\u6309\u626B\u7801\u5173\u6CE8\u4E0B\u65B9\u4E8C\u7EF4\u7801\uFF0C\u56DE\u590D \u300C<strong>00</strong>\u300D \u4E0B\u8F7D\u8FD910\u4EFD PDF \u5427\uFF01</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/weixin-bagwpdf-e13a4daa-3758-4aac-9871-7627c16b6843.jpg" alt=""></p><p>\xB7\xB7\xB7\xB7\xB7\xB7\xB7\xB7\xB7\xB7\xB7\xB7\xA0 END\xA0 \xB7\xB7\xB7\xB7\xB7\xB7\xB7\xB7\xB7\xB7\xB7\xB7\xB7\xB7</p>',23),o=[c];function i(n,g){return t(),a("div",null,o)}var d=e(p,[["render",i],["__file","weixin-bagwpdf.html.vue"]]);export{d as default};
diff --git a/dist/assets/weixin-chengxwjdwzhqcgxm.html.63b423d3.js b/dist/assets/weixin-chengxwjdwzhqcgxm.html.5c788b1b.js
similarity index 99%
rename from dist/assets/weixin-chengxwjdwzhqcgxm.html.63b423d3.js
rename to dist/assets/weixin-chengxwjdwzhqcgxm.html.5c788b1b.js
index f1ab46a6..c8f0b8a5 100644
--- a/dist/assets/weixin-chengxwjdwzhqcgxm.html.63b423d3.js
+++ b/dist/assets/weixin-chengxwjdwzhqcgxm.html.5c788b1b.js
@@ -1,4 +1,4 @@
-import{_ as i}from"./plugin-vue_export-helper.21dcd24c.js";import{o as n,c as e,e as d}from"./app.a0271b9c.js";const c={},s=d(`<blockquote><p>\u672C\u6587\u7AE0\u6765\u81EA\u7A0B\u5E8F\u6C6A\u80CC\u540E\u7684\u79C1\u6D3B\u5C0F\u56E2\u961F\uFF0C\u5F00\u53D1\u667A\u6167\u53D6\u9910\u67DC\u7684\u9879\u76EE\uFF0C\u672C\u9879\u76EE\u975E\u5E38\u7C7B\u4F3C\u5FEB\u9012\u67DC\u9879\u76EE\uFF0C\u672C\u9879\u76EE\u7684\u5B8C\u6574\u89E3\u51B3\u65B9\u6848\u8DDF\u5927\u5BB6\u5206\u4EAB\u4E00\u4E0B\uFF0C\u5E0C\u671B\u7ED9\u5927\u5BB6\u4E00\u4E9B\u53C2\u8003</p></blockquote><p>B\u7AD9 \u6211\u662F\u7A0B\u5E8F\u6C6A \u70B9\u6700\u4E0B\u65B9\u539F\u6587\u94FE\u63A5\u8FDB\u5165</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFHAz8cYz4nxib6fiaVyr4cEVgDJsm6p8rWf2WwKMejdDibU97WWSP2ibjMROehjQ7ZORHgLe4btWgSLCQ/640?wx_fmt=png" alt=""></p><p>\u8FD9\u662F\u53D6\u9910\u67DC\u6210\u54C1\u7684\u6837\u5B50\uFF0C\u786C\u4EF6\u5382\u5BB6\u63D0\u4F9B\u7684\u4E0D\u7528\u7A0B\u5E8F\u6C6A\u53BB\u5F00\u53D1\u786C\u4EF6\u54E6\uFF0C\u6211\u4EEC\u53EA\u5F00\u53D1\u7684\u8F6F\u4EF6\u90E8\u5206\uFF08\u5C0F\u7A0B\u5E8F\uFF0CPC\u7AEF\uFF0CAPP\uFF09</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFHibEAuDnfCldrtP18icV44r5n9ibibzplAZnDty7BFzez2nsadjRmJwuWyQDq2LhqcAxIdKnmAGnfQsQ/640?wx_fmt=png" alt=""></p><p>\u4E0B\u9762\u662F\u5382\u5BB6\u5FEB\u9012\u8FC7\u6765\u7684\u6D4B\u8BD5\u673A\u56684\u53E3\uFF0C\u522B\u95EE\u6211\u4E3A\u4EC0\u4E48\u8DDF\u4E0A\u9762\u7684\u4E0D\u4E00\u6837\uFF0C\u4E0A\u9762\u7684\u90A3\u4E2A\u5B9E\u5728\u592A\u5927\u4E86\u554A\uFF0C\u6D4B\u8BD5\u8054\u8C03\u53EA\u8981\u63A5\u53E3OK\u5C31\u884C</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFFcWw27h9hPibsicUqAKd4LZbmqJNCVyaRFkuzeNlpVU5Ilibz0pLibBicOiaib5lqwMYsNtbvzwJGjWN4Jw/640?wx_fmt=png" alt=""></p><p>\u6D41\u7A0B\u56FE\u5148\u6652\u4E0B\uFF0C\u753B\u7684\u5F88\u7B80\u5355</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFEt0wOnP0Enbp9AJgodVaibBoDyqxQqicPzB41LU5tVdLf4a68W4pHdTUxGTCQ8IvNFHwiaclniaA16og/640?wx_fmt=png" alt=""></p><p>B\u7AD9\u3010\u6211\u662F\u7A0B\u5E8F\u6C6A\u3011</p><p>\u73B0\u5728\u5F00\u53D1\u9879\u76EE\u90FD\u559C\u6B22\u524D\u9762\u52A0\u4E2A\u667A\u6167\uFF0C\u7A0B\u5E8F\u6C6A\u7684\u8FD9\u4E2A\u9879\u76EE\u4E5F\u662F\u667A\u6167XXX</p><p>\u8BF4\u767D\u4E86\u5C31\u662F\u4E00\u4E2A\u5916\u5356\u9879\u76EE\u7684\u5347\u7EA7\u7248\u672C</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFGr3zqU7QvZk780ticsnSpDFak6cBDI1dPvJWMjOZoEPUIeFcXFV4bQtVicrhiczhOf14rNHshTILh5A/640?wx_fmt=png" alt=""></p><p>\u8FD9\u56FE\u662F\u7528processon\u753B\u7684</p><h3 id="\u5F00\u53D1\u4EBA\u5458\u60C5\u51B5-1\u4EBA" tabindex="-1"><a class="header-anchor" href="#\u5F00\u53D1\u4EBA\u5458\u60C5\u51B5-1\u4EBA" aria-hidden="true">#</a> \u5F00\u53D1\u4EBA\u5458\u60C5\u51B5\uFF081\u4EBA\uFF09</h3><ul><li><p>uniapp \u524D\u7AEF \u6280\u672F\u6808 vue \u4E3B\u8981\u4EFB\u52A1 \u5C0F\u7A0B\u5E8F\u53CAPC\u7AEF\u9875\u9762,APP (\u5B58\u53D6 \u9910)</p></li><li><p>\u540E\u7AEF\xA0 \xA0\u6280\u672F\u6808\xA0 springboot</p></li><li><p>\u5F00\u53D1\u5468\u671F40\u5929\uFF08\u8BBE\u8BA1+\u5F00\u53D1\uFF09</p></li><li><p>\u5F00\u53D1\u4EBA\u6570 1\u4EBA</p></li><li><p>\u6574\u4F53\u8D39\u7528\u662F8\u4E07(\u4E0D\u542B\u786C\u4EF6\u90E8\u5206)\uFF0C\u8FD9\u662F\u4E00\u671F\u7684\u5F00\u53D1\u8D39\u7528</p></li><li><p>\u4ED8\u6B3E\u6A21\u5F0F 5:4:1 \u9996\u4ED8\uFF1A\u9A8C\u6536\uFF1A\u5C3E\u6B3E</p></li><li><p>\u8D70\u7684\u6B63\u89C4\u516C\u53F8\u5408\u540C</p></li><li><p>\u4E91\u670D\u52A1\u56681\u53F0 4\u68388G\uFF0C\u7ECF\u8D39\u6709\u9650\u5148\u5C31\u5B89\u63921\u53F0\uFF0C\u4E0D\u591F\u540E\u9762\u5347\u7EA7</p></li><li><p>\u7EF4\u62A4\u8D39\u7528 \u9879\u76EE\u603B\u6B3E\u987910%</p></li><li><p>\u552E\u540E\u7EF4\u62A4 | \u57DF\u540D | \u670D\u52A1\u5668 | \u65E5\u5E38\u8FD0\u7EF4 |</p></li></ul><h2 id="\u6280\u672F\u9009\u578B" tabindex="-1"><a class="header-anchor" href="#\u6280\u672F\u9009\u578B" aria-hidden="true">#</a> \u6280\u672F\u9009\u578B</h2><ul><li>\u6838\u5FC3\u6846\u67B6\uFF1ASpring Boot</li><li>\u6570\u636E\u5E93\u8FDE\u63A5\u6C60\uFF1ADruid</li><li>\u7F13\u5B58\uFF1Aredis</li><li>\u524D\u7AEF\uFF1AVue</li><li>APP \u5C0F\u7A0B\u5E8F Uniapp</li><li>\u6570\u636E\u5E93\uFF1Amysql</li><li>\u670D\u52A1\u5668\u914D\u7F6E 4\u68388G</li><li>\u786C\u4EF6\u63A5\u53E3\u5F00\u53D1\u8054\u8C03\uFF08\u4E91\u6253\u5370\u673A \u53D6\u9910\u67DC\uFF09</li></ul><h3 id="\u9879\u76EE\u80CC\u666F" tabindex="-1"><a class="header-anchor" href="#\u9879\u76EE\u80CC\u666F" aria-hidden="true">#</a> \u9879\u76EE\u80CC\u666F</h3><p>\u5927\u57CE\u5E02\u91CC\u516C\u53F8\u4E0A\u73ED\u65CF\uFF0C\u7ECF\u5E38\u4EA4\u901A\u901A\u52E4\u90FD1\u4E2A\u591A\u5C0F\u65F6\uFF0C\u8D2D\u4E70\u65E9\u9910\u4E5F\u7ECF\u5E38\u9700\u8981\u6392\u5F88\u957F\u7684\u961F\uFF0C\u5F88\u6D6A\u8D39\u65F6\u95F4\uFF0C\u672C\u7CFB\u7EDF\u5C31\u662F\u4E3A\u4E86\u89E3\u51B3\u4E0A\u73ED\u65CF\u8D2D\u4E70\u65E9\u9910\u96BE\u7684\u75DB\u70B9\u800C\u8BDE\u751F\u7684\u3002\u7A0B\u5E8F\u6C6A\u4E0A\u6D77\u4E0A\u73ED\u65F6\uFF0C\u5403\u65E9\u9910\u5C31\u5F88\u5934\u75BC\uFF0C\u529E\u516C\u5927\u53A6\u697C\u4E0B\u65E9\u9910\u5E97\u6392\u961F\u5F88\u5938\u5F20\u7684\uFF0C\u6D6A\u8D39\u4E86\u6211\u5F88\u591A\u5199\u4EE3\u7801\u7684\u65F6\u95F4\u5440\u3002</p><h3 id="\u5C0F\u7A0B\u5E8F" tabindex="-1"><a class="header-anchor" href="#\u5C0F\u7A0B\u5E8F" aria-hidden="true">#</a> \u5C0F\u7A0B\u5E8F</h3><p>\u7A0B\u5E8F\u6C6A\u628A\u6838\u5FC3\u9875\u9762\u622A\u56FE\u51FA\u6765</p><p>\u672C\u5C0F\u7A0B\u5E8F\u4E3B\u8981\u529F\u80FD\u5C31\u8FD9\u4E9B</p><ul><li>\u7528\u6237\u4E0B\u8BA2\u5355</li><li>\u9A91\u624B\u5B58\u9910</li></ul><p>\u4E0B\u9762\u662F\u6211\u4EEC\u7684\u6D4B\u8BD5\u4F53\u9A8C\u7248\u5C0F\u7A0B\u5E8F\uFF0C\u521D\u59CB\u6570\u636E\u6709\u70B9\u968F\u610F</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFEt0wOnP0Enbp9AJgodVaibB2ibwBZgXfa6k9TwI37ia4E0SaWbXbvPutxrDzURXydvEOEKkWsAW58kw/640?wx_fmt=png" alt=""></p><p>\u8DDF\u666E\u901A\u4E0B\u5355\u5916\u5356\u4E0D\u540C\u7684\u5730\u65B9\u5C31\u662F\u53EF\u4EE5\u9009\u62E9\u53D6\u9910\u65F6\u95F4\u548C\u673A\u67DC</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFEt0wOnP0Enbp9AJgodVaibBMLDjM4lgYbDcNyEmMGyQHYqzOuyHc1K1XO8k0nEmNVakDvSn0JFbTA/640?wx_fmt=png" alt=""></p><p>\u9A91\u624B\u8FDB\u5165\u672C\u9875\u9762\u70B9\u51FB\u3010\u5B58\u9910\u3011\u89E6\u53D1 \u53D6\u9910\u67DC</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFHibEAuDnfCldrtP18icV44r5tE22SgKjh78qLaQP5efibuEvAnxu9DormqCCIxfDy0LAJMJQgrKduRQ/640?wx_fmt=png" alt=""></p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFEt0wOnP0Enbp9AJgodVaibBjoNWhyhxT76lF4R7BpY59jMYMEBUUC05LTeeTPibCFzMtWQ5OUibziafQ/640?wx_fmt=png" alt=""></p><p>\u4E0B\u5355\u6210\u529F\u4F1A\u77ED\u4FE1\u901A\u77E5\u7528\u6237 \u53D6\u9910\u7801</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFEt0wOnP0Enbp9AJgodVaibBBMSWohkMMPL4sWMkkogZSOGVia3Gj9uYPgODym0RMj4f1PFOTWyicibOQ/640?wx_fmt=png" alt=""></p><h3 id="pc\u7AEF" tabindex="-1"><a class="header-anchor" href="#pc\u7AEF" aria-hidden="true">#</a> PC\u7AEF</h3><p>\u76EE\u524D\u4E3B\u8981\u529F\u80FD\uFF0C\u8BF4\u767D\u4E86\u5728\u5916\u5356\u7CFB\u7EDF\u4E8C\u5F00\u7684\uFF0C\u5206\u7CFB\u7EDF\u7BA1\u7406\u5458\u548C\u5546\u5BB6\u89D2\u8272</p><ul><li><p>\u5546\u54C1\u7BA1\u7406 -\u5206\u7CFB\u7EDF\u548C\u5546\u5BB6</p></li><li><p>\u8BA2\u5355\u7BA1\u7406\xA0 \xA0-\u5206\u7CFB\u7EDF\u548C\u5546\u5BB6</p></li><li><p>\u5E97\u94FA\u7BA1\u7406\xA0 \xA0-\u5206\u7CFB\u7EDF\u548C\u5546\u5BB6</p></li><li><p>\u4F1A\u5458\u6743\u9650\u7BA1\u7406</p></li><li><p>\u552E\u540E\u7BA1\u7406</p></li><li><p>\u7EDF\u8BA1\u62A5\u8868</p></li><li><p>\u8BA2\u5355\u7269\u6D41</p></li><li><p>\u8D22\u52A1\u7BA1\u7406</p></li><li><p>\u9A91\u624B\u7BA1\u7406</p></li><li></li></ul><p>\u4E0B\u9762\u622A\u56FE\u5C31\u662F\u5F00\u6E90\u7CFB\u7EDF\u4E0A\u9762\u4E8C\u5F00\u7684\uFF0C\u522B\u95EE\u6211\u4E3A\u5565\u7BA1\u7406\u7CFB\u7EDF\u9875\u9762\u90FD\u957F\u4E86\u5DEE\u4E0D\u591A\uFF0C\u524D\u7AEF\u662FVue</p><p>\u7CFB\u7EDF\u7BA1\u7406\u5458\u89D2\u8272</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFEt0wOnP0Enbp9AJgodVaibBcWRDlxnmCsF1Zl6AzPf4kIqicSxHh9z9zick9Ocz1kPDlm1wO09421Kw/640?wx_fmt=png" alt=""></p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFEt0wOnP0Enbp9AJgodVaibBRphhn1htCwzpfjrMNCwJregXequUibCMbgaHr0nvicuV5vj80qaQ8kwg/640?wx_fmt=png" alt=""></p><p>\u5546\u5BB6\u89D2\u8272<img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFEt0wOnP0Enbp9AJgodVaibB2lz1EHN1AxQVoVScgmAibBoMuwBp39XRFaZnWQruXrj5HsmoQ9TPjDQ/640?wx_fmt=png" alt=""></p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFEt0wOnP0Enbp9AJgodVaibBokgic1Lv6Z7xlabe8vice0PiaIhHd8xIcZcar3ADgvjibQqn67ydia7yVbA/640?wx_fmt=png" alt=""></p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFEt0wOnP0Enbp9AJgodVaibBOBRBKsyDXGL96F4qZUmQpaKR2f0aaTP6MeFEp6s8ibicRVZWC21wX4og/640?wx_fmt=png" alt=""></p><h3 id="\u786C\u4EF6\u90E8\u5206-\u53D6\u9910\u67DC" tabindex="-1"><a class="header-anchor" href="#\u786C\u4EF6\u90E8\u5206-\u53D6\u9910\u67DC" aria-hidden="true">#</a> \u786C\u4EF6\u90E8\u5206\uFF08\u53D6\u9910\u67DC\uFF09</h3><p>\u4E3B\u8981\u786C\u4EF6\u662F\u53D6\u9910\u67DC\uFF0C\u8FD9\u4E2A\u662F\u627E\u7684\u7B2C\u4E09\u65B9\u73B0\u6210\u7684\u786C\u4EF6\u5382\u5BB6\uFF0C\u5BF9\u65B9\u4F1A\u63D0\u4F9B\u63A5\u53E3\u6587\u6863\u5177\u4F53\u7684SDK\u5305\uFF0C\u6211\u4EEC\u7684\u5DE5\u4F5C\u91CF\u5C31\u662F\u63A5\u53E3\u5F00\u53D1\u7136\u540E\u8054\u8C03\u4E00\u6CE2\u3002</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFFcWw27h9hPibsicUqAKd4LZbmqJNCVyaRFkuzeNlpVU5Ilibz0pLibBicOiaib5lqwMYsNtbvzwJGjWN4Jw/640?wx_fmt=png" alt=""></p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFEt0wOnP0Enbp9AJgodVaibBxZEJAQqOYUiaicXwc6BK6bgRg77abDZcibfRePicTyLnia38OJDNFgWPBKA/640?wx_fmt=png" alt=""></p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFEt0wOnP0Enbp9AJgodVaibBPh1EPibIGGgDSricr9O4qBObltaJr3T0Z71b5l9IlvAdE8cVr99gBWpQ/640?wx_fmt=png" alt=""></p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFEt0wOnP0Enbp9AJgodVaibBEqZMXAMMucCo9yNL3RhoPdT3oZW4ZYvjopEfqVNGOwcdYy4XDqRHNw/640?wx_fmt=png" alt=""></p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFEt0wOnP0Enbp9AJgodVaibBWaicZkZibibwGcBwNpKtJybNTBvzhFJJGj1C3WFkJuTLuuZHBicg9hKCaw/640?wx_fmt=png" alt=""></p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFEt0wOnP0Enbp9AJgodVaibBU9kBPeyw7ab59qqlHVsxLQZVPhoUVhoxJicDRycJfWjOIfibBEicLEBbQ/640?wx_fmt=png" alt=""></p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFEt0wOnP0Enbp9AJgodVaibBmbryv7W2USucwN1DBKbDAgO358AVaeqzTrAZ5EzOTfJNv2qz8UiaOhQ/640?wx_fmt=png" alt=""></p><h3 id="\u53D6\u9910\u63A5\u53E3-\u53D6\u9910\u67DC" tabindex="-1"><a class="header-anchor" href="#\u53D6\u9910\u63A5\u53E3-\u53D6\u9910\u67DC" aria-hidden="true">#</a> \u53D6\u9910\u63A5\u53E3\uFF08\u53D6\u9910\u67DC\uFF09</h3><p>\u4E0B\u9762\u6211\u628A\u6838\u5FC3\u7684\u5B58\u9910\u63A5\u53E3\u7ED9\u5927\u5BB6\u5217\u51FA\u6765\u4E0B</p><h2 id="\u521B\u5EFA\u5B58\u9910\u8BA2\u5355" tabindex="-1"><a class="header-anchor" href="#\u521B\u5EFA\u5B58\u9910\u8BA2\u5355" aria-hidden="true">#</a> \u521B\u5EFA\u5B58\u9910\u8BA2\u5355</h2><p><strong>\u4F7F\u7528\u573A\u666F</strong></p><p>\u521B\u5EFA\u5B58\u9910\u8BA2\u5355</p><p><strong>\u64CD\u4F5C\u540D\u79F0</strong></p><p>createOrder</p><p><strong>\u8BF7\u6C42\u5B57\u6BB5</strong></p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>{  
+import{_ as i}from"./plugin-vue_export-helper.21dcd24c.js";import{o as n,c as e,e as d}from"./app.615e41d8.js";const c={},s=d(`<blockquote><p>\u672C\u6587\u7AE0\u6765\u81EA\u7A0B\u5E8F\u6C6A\u80CC\u540E\u7684\u79C1\u6D3B\u5C0F\u56E2\u961F\uFF0C\u5F00\u53D1\u667A\u6167\u53D6\u9910\u67DC\u7684\u9879\u76EE\uFF0C\u672C\u9879\u76EE\u975E\u5E38\u7C7B\u4F3C\u5FEB\u9012\u67DC\u9879\u76EE\uFF0C\u672C\u9879\u76EE\u7684\u5B8C\u6574\u89E3\u51B3\u65B9\u6848\u8DDF\u5927\u5BB6\u5206\u4EAB\u4E00\u4E0B\uFF0C\u5E0C\u671B\u7ED9\u5927\u5BB6\u4E00\u4E9B\u53C2\u8003</p></blockquote><p>B\u7AD9 \u6211\u662F\u7A0B\u5E8F\u6C6A \u70B9\u6700\u4E0B\u65B9\u539F\u6587\u94FE\u63A5\u8FDB\u5165</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFHAz8cYz4nxib6fiaVyr4cEVgDJsm6p8rWf2WwKMejdDibU97WWSP2ibjMROehjQ7ZORHgLe4btWgSLCQ/640?wx_fmt=png" alt=""></p><p>\u8FD9\u662F\u53D6\u9910\u67DC\u6210\u54C1\u7684\u6837\u5B50\uFF0C\u786C\u4EF6\u5382\u5BB6\u63D0\u4F9B\u7684\u4E0D\u7528\u7A0B\u5E8F\u6C6A\u53BB\u5F00\u53D1\u786C\u4EF6\u54E6\uFF0C\u6211\u4EEC\u53EA\u5F00\u53D1\u7684\u8F6F\u4EF6\u90E8\u5206\uFF08\u5C0F\u7A0B\u5E8F\uFF0CPC\u7AEF\uFF0CAPP\uFF09</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFHibEAuDnfCldrtP18icV44r5n9ibibzplAZnDty7BFzez2nsadjRmJwuWyQDq2LhqcAxIdKnmAGnfQsQ/640?wx_fmt=png" alt=""></p><p>\u4E0B\u9762\u662F\u5382\u5BB6\u5FEB\u9012\u8FC7\u6765\u7684\u6D4B\u8BD5\u673A\u56684\u53E3\uFF0C\u522B\u95EE\u6211\u4E3A\u4EC0\u4E48\u8DDF\u4E0A\u9762\u7684\u4E0D\u4E00\u6837\uFF0C\u4E0A\u9762\u7684\u90A3\u4E2A\u5B9E\u5728\u592A\u5927\u4E86\u554A\uFF0C\u6D4B\u8BD5\u8054\u8C03\u53EA\u8981\u63A5\u53E3OK\u5C31\u884C</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFFcWw27h9hPibsicUqAKd4LZbmqJNCVyaRFkuzeNlpVU5Ilibz0pLibBicOiaib5lqwMYsNtbvzwJGjWN4Jw/640?wx_fmt=png" alt=""></p><p>\u6D41\u7A0B\u56FE\u5148\u6652\u4E0B\uFF0C\u753B\u7684\u5F88\u7B80\u5355</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFEt0wOnP0Enbp9AJgodVaibBoDyqxQqicPzB41LU5tVdLf4a68W4pHdTUxGTCQ8IvNFHwiaclniaA16og/640?wx_fmt=png" alt=""></p><p>B\u7AD9\u3010\u6211\u662F\u7A0B\u5E8F\u6C6A\u3011</p><p>\u73B0\u5728\u5F00\u53D1\u9879\u76EE\u90FD\u559C\u6B22\u524D\u9762\u52A0\u4E2A\u667A\u6167\uFF0C\u7A0B\u5E8F\u6C6A\u7684\u8FD9\u4E2A\u9879\u76EE\u4E5F\u662F\u667A\u6167XXX</p><p>\u8BF4\u767D\u4E86\u5C31\u662F\u4E00\u4E2A\u5916\u5356\u9879\u76EE\u7684\u5347\u7EA7\u7248\u672C</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFGr3zqU7QvZk780ticsnSpDFak6cBDI1dPvJWMjOZoEPUIeFcXFV4bQtVicrhiczhOf14rNHshTILh5A/640?wx_fmt=png" alt=""></p><p>\u8FD9\u56FE\u662F\u7528processon\u753B\u7684</p><h3 id="\u5F00\u53D1\u4EBA\u5458\u60C5\u51B5-1\u4EBA" tabindex="-1"><a class="header-anchor" href="#\u5F00\u53D1\u4EBA\u5458\u60C5\u51B5-1\u4EBA" aria-hidden="true">#</a> \u5F00\u53D1\u4EBA\u5458\u60C5\u51B5\uFF081\u4EBA\uFF09</h3><ul><li><p>uniapp \u524D\u7AEF \u6280\u672F\u6808 vue \u4E3B\u8981\u4EFB\u52A1 \u5C0F\u7A0B\u5E8F\u53CAPC\u7AEF\u9875\u9762,APP (\u5B58\u53D6 \u9910)</p></li><li><p>\u540E\u7AEF\xA0 \xA0\u6280\u672F\u6808\xA0 springboot</p></li><li><p>\u5F00\u53D1\u5468\u671F40\u5929\uFF08\u8BBE\u8BA1+\u5F00\u53D1\uFF09</p></li><li><p>\u5F00\u53D1\u4EBA\u6570 1\u4EBA</p></li><li><p>\u6574\u4F53\u8D39\u7528\u662F8\u4E07(\u4E0D\u542B\u786C\u4EF6\u90E8\u5206)\uFF0C\u8FD9\u662F\u4E00\u671F\u7684\u5F00\u53D1\u8D39\u7528</p></li><li><p>\u4ED8\u6B3E\u6A21\u5F0F 5:4:1 \u9996\u4ED8\uFF1A\u9A8C\u6536\uFF1A\u5C3E\u6B3E</p></li><li><p>\u8D70\u7684\u6B63\u89C4\u516C\u53F8\u5408\u540C</p></li><li><p>\u4E91\u670D\u52A1\u56681\u53F0 4\u68388G\uFF0C\u7ECF\u8D39\u6709\u9650\u5148\u5C31\u5B89\u63921\u53F0\uFF0C\u4E0D\u591F\u540E\u9762\u5347\u7EA7</p></li><li><p>\u7EF4\u62A4\u8D39\u7528 \u9879\u76EE\u603B\u6B3E\u987910%</p></li><li><p>\u552E\u540E\u7EF4\u62A4 | \u57DF\u540D | \u670D\u52A1\u5668 | \u65E5\u5E38\u8FD0\u7EF4 |</p></li></ul><h2 id="\u6280\u672F\u9009\u578B" tabindex="-1"><a class="header-anchor" href="#\u6280\u672F\u9009\u578B" aria-hidden="true">#</a> \u6280\u672F\u9009\u578B</h2><ul><li>\u6838\u5FC3\u6846\u67B6\uFF1ASpring Boot</li><li>\u6570\u636E\u5E93\u8FDE\u63A5\u6C60\uFF1ADruid</li><li>\u7F13\u5B58\uFF1Aredis</li><li>\u524D\u7AEF\uFF1AVue</li><li>APP \u5C0F\u7A0B\u5E8F Uniapp</li><li>\u6570\u636E\u5E93\uFF1Amysql</li><li>\u670D\u52A1\u5668\u914D\u7F6E 4\u68388G</li><li>\u786C\u4EF6\u63A5\u53E3\u5F00\u53D1\u8054\u8C03\uFF08\u4E91\u6253\u5370\u673A \u53D6\u9910\u67DC\uFF09</li></ul><h3 id="\u9879\u76EE\u80CC\u666F" tabindex="-1"><a class="header-anchor" href="#\u9879\u76EE\u80CC\u666F" aria-hidden="true">#</a> \u9879\u76EE\u80CC\u666F</h3><p>\u5927\u57CE\u5E02\u91CC\u516C\u53F8\u4E0A\u73ED\u65CF\uFF0C\u7ECF\u5E38\u4EA4\u901A\u901A\u52E4\u90FD1\u4E2A\u591A\u5C0F\u65F6\uFF0C\u8D2D\u4E70\u65E9\u9910\u4E5F\u7ECF\u5E38\u9700\u8981\u6392\u5F88\u957F\u7684\u961F\uFF0C\u5F88\u6D6A\u8D39\u65F6\u95F4\uFF0C\u672C\u7CFB\u7EDF\u5C31\u662F\u4E3A\u4E86\u89E3\u51B3\u4E0A\u73ED\u65CF\u8D2D\u4E70\u65E9\u9910\u96BE\u7684\u75DB\u70B9\u800C\u8BDE\u751F\u7684\u3002\u7A0B\u5E8F\u6C6A\u4E0A\u6D77\u4E0A\u73ED\u65F6\uFF0C\u5403\u65E9\u9910\u5C31\u5F88\u5934\u75BC\uFF0C\u529E\u516C\u5927\u53A6\u697C\u4E0B\u65E9\u9910\u5E97\u6392\u961F\u5F88\u5938\u5F20\u7684\uFF0C\u6D6A\u8D39\u4E86\u6211\u5F88\u591A\u5199\u4EE3\u7801\u7684\u65F6\u95F4\u5440\u3002</p><h3 id="\u5C0F\u7A0B\u5E8F" tabindex="-1"><a class="header-anchor" href="#\u5C0F\u7A0B\u5E8F" aria-hidden="true">#</a> \u5C0F\u7A0B\u5E8F</h3><p>\u7A0B\u5E8F\u6C6A\u628A\u6838\u5FC3\u9875\u9762\u622A\u56FE\u51FA\u6765</p><p>\u672C\u5C0F\u7A0B\u5E8F\u4E3B\u8981\u529F\u80FD\u5C31\u8FD9\u4E9B</p><ul><li>\u7528\u6237\u4E0B\u8BA2\u5355</li><li>\u9A91\u624B\u5B58\u9910</li></ul><p>\u4E0B\u9762\u662F\u6211\u4EEC\u7684\u6D4B\u8BD5\u4F53\u9A8C\u7248\u5C0F\u7A0B\u5E8F\uFF0C\u521D\u59CB\u6570\u636E\u6709\u70B9\u968F\u610F</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFEt0wOnP0Enbp9AJgodVaibB2ibwBZgXfa6k9TwI37ia4E0SaWbXbvPutxrDzURXydvEOEKkWsAW58kw/640?wx_fmt=png" alt=""></p><p>\u8DDF\u666E\u901A\u4E0B\u5355\u5916\u5356\u4E0D\u540C\u7684\u5730\u65B9\u5C31\u662F\u53EF\u4EE5\u9009\u62E9\u53D6\u9910\u65F6\u95F4\u548C\u673A\u67DC</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFEt0wOnP0Enbp9AJgodVaibBMLDjM4lgYbDcNyEmMGyQHYqzOuyHc1K1XO8k0nEmNVakDvSn0JFbTA/640?wx_fmt=png" alt=""></p><p>\u9A91\u624B\u8FDB\u5165\u672C\u9875\u9762\u70B9\u51FB\u3010\u5B58\u9910\u3011\u89E6\u53D1 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src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFEt0wOnP0Enbp9AJgodVaibBRphhn1htCwzpfjrMNCwJregXequUibCMbgaHr0nvicuV5vj80qaQ8kwg/640?wx_fmt=png" alt=""></p><p>\u5546\u5BB6\u89D2\u8272<img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFEt0wOnP0Enbp9AJgodVaibB2lz1EHN1AxQVoVScgmAibBoMuwBp39XRFaZnWQruXrj5HsmoQ9TPjDQ/640?wx_fmt=png" alt=""></p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFEt0wOnP0Enbp9AJgodVaibBokgic1Lv6Z7xlabe8vice0PiaIhHd8xIcZcar3ADgvjibQqn67ydia7yVbA/640?wx_fmt=png" alt=""></p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFEt0wOnP0Enbp9AJgodVaibBOBRBKsyDXGL96F4qZUmQpaKR2f0aaTP6MeFEp6s8ibicRVZWC21wX4og/640?wx_fmt=png" alt=""></p><h3 id="\u786C\u4EF6\u90E8\u5206-\u53D6\u9910\u67DC" tabindex="-1"><a class="header-anchor" href="#\u786C\u4EF6\u90E8\u5206-\u53D6\u9910\u67DC" aria-hidden="true">#</a> \u786C\u4EF6\u90E8\u5206\uFF08\u53D6\u9910\u67DC\uFF09</h3><p>\u4E3B\u8981\u786C\u4EF6\u662F\u53D6\u9910\u67DC\uFF0C\u8FD9\u4E2A\u662F\u627E\u7684\u7B2C\u4E09\u65B9\u73B0\u6210\u7684\u786C\u4EF6\u5382\u5BB6\uFF0C\u5BF9\u65B9\u4F1A\u63D0\u4F9B\u63A5\u53E3\u6587\u6863\u5177\u4F53\u7684SDK\u5305\uFF0C\u6211\u4EEC\u7684\u5DE5\u4F5C\u91CF\u5C31\u662F\u63A5\u53E3\u5F00\u53D1\u7136\u540E\u8054\u8C03\u4E00\u6CE2\u3002</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFFcWw27h9hPibsicUqAKd4LZbmqJNCVyaRFkuzeNlpVU5Ilibz0pLibBicOiaib5lqwMYsNtbvzwJGjWN4Jw/640?wx_fmt=png" alt=""></p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFEt0wOnP0Enbp9AJgodVaibBxZEJAQqOYUiaicXwc6BK6bgRg77abDZcibfRePicTyLnia38OJDNFgWPBKA/640?wx_fmt=png" alt=""></p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFEt0wOnP0Enbp9AJgodVaibBPh1EPibIGGgDSricr9O4qBObltaJr3T0Z71b5l9IlvAdE8cVr99gBWpQ/640?wx_fmt=png" alt=""></p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFEt0wOnP0Enbp9AJgodVaibBEqZMXAMMucCo9yNL3RhoPdT3oZW4ZYvjopEfqVNGOwcdYy4XDqRHNw/640?wx_fmt=png" alt=""></p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFEt0wOnP0Enbp9AJgodVaibBWaicZkZibibwGcBwNpKtJybNTBvzhFJJGj1C3WFkJuTLuuZHBicg9hKCaw/640?wx_fmt=png" alt=""></p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFEt0wOnP0Enbp9AJgodVaibBU9kBPeyw7ab59qqlHVsxLQZVPhoUVhoxJicDRycJfWjOIfibBEicLEBbQ/640?wx_fmt=png" alt=""></p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFEt0wOnP0Enbp9AJgodVaibBmbryv7W2USucwN1DBKbDAgO358AVaeqzTrAZ5EzOTfJNv2qz8UiaOhQ/640?wx_fmt=png" alt=""></p><h3 id="\u53D6\u9910\u63A5\u53E3-\u53D6\u9910\u67DC" tabindex="-1"><a class="header-anchor" href="#\u53D6\u9910\u63A5\u53E3-\u53D6\u9910\u67DC" aria-hidden="true">#</a> \u53D6\u9910\u63A5\u53E3\uFF08\u53D6\u9910\u67DC\uFF09</h3><p>\u4E0B\u9762\u6211\u628A\u6838\u5FC3\u7684\u5B58\u9910\u63A5\u53E3\u7ED9\u5927\u5BB6\u5217\u51FA\u6765\u4E0B</p><h2 id="\u521B\u5EFA\u5B58\u9910\u8BA2\u5355" tabindex="-1"><a class="header-anchor" href="#\u521B\u5EFA\u5B58\u9910\u8BA2\u5355" aria-hidden="true">#</a> \u521B\u5EFA\u5B58\u9910\u8BA2\u5355</h2><p><strong>\u4F7F\u7528\u573A\u666F</strong></p><p>\u521B\u5EFA\u5B58\u9910\u8BA2\u5355</p><p><strong>\u64CD\u4F5C\u540D\u79F0</strong></p><p>createOrder</p><p><strong>\u8BF7\u6C42\u5B57\u6BB5</strong></p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>{  
 
     &quot;deviceId&quot;:&quot;xxxxxxxxxxx&quot;,   // \u5FC5\u4F20\uFF0C\u8BBE\u5907ID  
 
diff --git a/dist/assets/weixin-githubxbkdjavajccjyh.html.11c03a69.js b/dist/assets/weixin-githubxbkdjavajccjyh.html.11c03a69.js
new file mode 100644
index 00000000..14c23215
--- /dev/null
+++ b/dist/assets/weixin-githubxbkdjavajccjyh.html.11c03a69.js
@@ -0,0 +1 @@
+import{_ as a}from"./plugin-vue_export-helper.21dcd24c.js";import{r as c,o as r,c as o,a as e,b as n,e as i,d as b}from"./app.615e41d8.js";const s={},p=i('<p>\u5B66 Java \u5176\u5B9E\u4E0D\u96BE\uFF0C\u91CD\u8981\u7684\u662F\u627E\u5230\u597D\u7684\u5B66\u4E60\u8D44\u6599\u548C\u5B66\u4E60\u65B9\u6CD5\uFF0C\u7136\u540E\u5C31\u662F\u4ED8\u8BF8\u5B9E\u8DF5\u3002</p><p>\u6211\u4E0D\u592A\u5EFA\u8BAE\u5927\u5BB6\u4E00\u4E0A\u6765\u5C31\u9605\u8BFB\u300AJava \u6838\u5FC3\u6280\u672F\u5377\u300B\u8FD9\u4E9B\u4E66\uFF0C\u56E0\u4E3A\u4E66\u592A\u539A\uFF0C\u5BF9\u4E8E\u521D\u5B66\u8005\u6765\u8BF4\u4E0D\u662F\u7279\u522B\u53CB\u597D\uFF0C\u5982\u679C\u6CA1\u8010\u5FC3\u53EF\u80FD\u5C31\u76F4\u63A5\u529D\u9000\u4E86\u3002\u6211\u4E5F\u4E0D\u592A\u5EFA\u8BAE\u5927\u5BB6\u4E00\u4E0A\u6765\u5C31\u53BB\u770B\u89C6\u9891\uFF0C\u56E0\u4E3A\u89C6\u9891\u4E00\u822C\u6BD4\u8F83\u5570\u55E6\uFF0C\u6293\u4E0D\u4F4F\u91CD\u70B9\u3002</p><p><strong>\u5927\u5BB6\u5148\u770B\u770B\u6211\u6574\u7406\u7684\u8FD9\u4EFD GitHub \u4E0A\u661F\u6807 115k+ \u7684 Java \u6559\u7A0B\uFF0C\u91CC\u9762\u6DB5\u76D6\u4E86 Java \u6240\u6709\u7684\u77E5\u8BC6\u70B9\uFF0C\u5305\u62EC Java \u8BED\u6CD5\u3001Java \u96C6\u5408\u6846\u67B6\u3001Java IO\u3001Java \u5E76\u53D1\u7F16\u7A0B\u548C Java \u865A\u62DF\u673A\uFF0C\u5185\u5BB9\u4E0D\u591A\uFF0C\u53EA\u8BB2\u91CD\u70B9</strong>\u3002</p><p><strong>\u53EF\u4EE5\u626B\u63CF\u4E0B\u65B9\u7684\u4E8C\u7EF4\u7801\u53D1\u9001\u5173\u952E\u5B57\u300C<strong>001</strong>\u300D\u83B7\u53D6\u4E0B\u8F7D\u94FE\u63A5\u3002</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/weixin-githubxbkdjavajccjyh-15bfca54-eda2-481f-b0d9-1cfbfd946c58.jpg" alt=""></p><p><strong>\u4E5F\u53EF\u4EE5\u76F4\u63A5\u5FAE\u4FE1\u641C\u7D22\u300C\u6C89\u9ED8\u738B\u4E8C\u300D\u5173\u6CE8\u540E\u56DE\u590D\u3010001\u3011</strong></p><p>\u6765\u770B\u4E00\u4E0B\u76EE\u5F55\u5427\uFF01</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/weixin-githubxbkdjavajccjyh-26a35c09-2724-4c70-8001-efdfc3a62f25.jpg" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/weixin-githubxbkdjavajccjyh-8ec9715c-8a43-44d8-a546-060cac4025eb.jpg" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/weixin-githubxbkdjavajccjyh-31800094-0b88-42d8-a620-deabe7150e19.jpg" alt=""></p><p>\u4E3A\u4E86\u6574\u7406\u8FD9\u4EFD PDF\uFF0C\u6211\u53EF\u662F\u8D39\u4E86\u8001\u5927\u52B2\uFF0C\u5E0C\u671B\u5927\u5BB6\u80FD\u73CD\u60DC\u3002\u76EE\u524D\u8FD9\u4EFD PDF \u5DF2\u7ECF\u653E\u5728\u767E\u5EA6\u7F51\u76D8\u4E0A\uFF0C\u4E0B\u8F7D\u6570\u91CF\u6709\u4E09\u4E07\u4E00\u5343\u591A\u6B21\uFF0C\u8BF4\u660E\u5F97\u5230\u4E86\u5F88\u591A\u4EBA\u7684\u8BA4\u540C\u3002</p><p><strong>\u53EF\u4EE5\u5FAE\u4FE1\u641C\u7D22\u300C<strong>\u6C89\u9ED8\u738B\u4E8C</strong>\u300D\u6216\u8005\u626B\u63CF\u4E0B\u9762\u7684\u4E8C\u7EF4\u7801\u5173\u6CE8\u540E\u56DE\u590D\u300C<strong>001</strong>\u300D\u5173\u952E\u5B57\u62C9\u53D6\u79BB\u7EBF\u7248 PDF \u7684\u4E0B\u8F7D\u5730\u5740\u3002</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/weixin-githubxbkdjavajccjyh-15bfca54-eda2-481f-b0d9-1cfbfd946c58.jpg" alt=""></p><p>GitHub \u5730\u5740\u6211\u4E5F\u8D34\u4E00\u4E0B\uFF1A</p>',14),g={href:"https://github.com/CyC2018/CS-Notes",target:"_blank",rel:"noopener noreferrer"},j=b("https://github.com/CyC2018/CS-Notes");function d(h,v){const t=c("ExternalLinkIcon");return r(),o("div",null,[p,e("blockquote",null,[e("p",null,[e("a",g,[j,n(t)])])])])}var f=a(s,[["render",d],["__file","weixin-githubxbkdjavajccjyh.html.vue"]]);export{f as default};
diff --git a/dist/assets/weixin-githubxbkdjavajccjyh.html.be4183ae.js b/dist/assets/weixin-githubxbkdjavajccjyh.html.be4183ae.js
new file mode 100644
index 00000000..64a4295a
--- /dev/null
+++ b/dist/assets/weixin-githubxbkdjavajccjyh.html.be4183ae.js
@@ -0,0 +1 @@
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diff --git a/dist/assets/weixin-liaoliaoxianliu.html.3a09df17.js b/dist/assets/weixin-liaoliaoxianliu.html.fa1a5a6a.js
similarity index 99%
rename from dist/assets/weixin-liaoliaoxianliu.html.3a09df17.js
rename to dist/assets/weixin-liaoliaoxianliu.html.fa1a5a6a.js
index 3be8d5b7..7ef88c6b 100644
--- a/dist/assets/weixin-liaoliaoxianliu.html.3a09df17.js
+++ b/dist/assets/weixin-liaoliaoxianliu.html.fa1a5a6a.js
@@ -1,4 +1,4 @@
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src="https://mmbiz.qpic.cn/mmbiz_png/sXFqMxQoVLHVUYY15MYFpF1D5fDtiao11SePQJZST6bL83CTafTCXICicdY5y66tomZ9Pmy8ibytiaWoLPyOWIwytQ/640?wx_fmt=png" alt=""></p><p>\u6839\u636E\u9650\u6D41\u4F5C\u7528\u8303\u56F4\uFF0C\u53EF\u4EE5\u5206\u4E3A<strong>\u5355\u673A\u9650\u6D41\u548C\u5206\u5E03\u5F0F\u9650\u6D41</strong>\uFF1B\u6839\u636E\u9650\u6D41\u65B9\u5F0F\uFF0C\u53C8\u5206\u4E3A<strong>\u8BA1\u6570\u5668\u3001\u6ED1\u52A8\u7A97\u53E3\u3001\u6F0F\u6876\u548C\u4EE4\u724C\u6876\u9650\u6D41</strong>\uFF0C\u4E0B\u9762\u6211\u4EEC\u5BF9\u8FD9\u5757\u8BE6\u7EC6\u8FDB\u884C\u8BB2\u89E3\u3002</p>',6),p=i("\u6587\u7AE0\u5927\u90E8\u5206\u5185\u5BB9\u53C2\u8003 \xA0TPaper \u7684"),b={href:"https://mp.weixin.qq.com/s?__biz=MzI3MzQwNjcyNg==&mid=2247485144&idx=1&sn=ebc4bddf53ba5dd01943f0e1b1d452fa&chksm=eb2288b1dc5501a77a2108b2e439f35d09018a8b8d67b664126821bc18dc3df3272cb63dcf6e&token=854767795&lang=zh_CN&scene=21#wechat_redirect",target:"_blank",rel:"noopener noreferrer"},u=i("\u300AGo 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count\uFF0C\u5F53\u8FC7\u6765\u4E00\u4E2A\u8BF7\u6C42\u6211\u5C31\u5C06\u8FD9\u4E2A\u6570 +1\uFF0C\u540C\u65F6\u8BB0\u5F55\u8BF7\u6C42\u65F6\u95F4\u3002</li><li>\u5F53\u4E0B\u4E00\u4E2A\u8BF7\u6C42\u6765\u7684\u65F6\u5019\u5224\u65AD count \u7684\u8BA1\u6570\u503C\u662F\u5426\u8D85\u8FC7\u8BBE\u5B9A\u7684\u9891\u6B21\uFF0C\u4EE5\u53CA\u5F53\u524D\u8BF7\u6C42\u7684\u65F6\u95F4\u548C\u7B2C\u4E00\u6B21\u8BF7\u6C42\u65F6\u95F4\u662F\u5426\u5728 1 \u5206\u949F\u5185\u3002</li><li>\u5982\u679C\u5728 1 \u5206\u949F\u5185\u5E76\u4E14\u8D85\u8FC7\u8BBE\u5B9A\u7684\u9891\u6B21\u5219\u8BC1\u660E\u8BF7\u6C42\u8FC7\u591A\uFF0C\u540E\u9762\u7684\u8BF7\u6C42\u5C31\u62D2\u7EDD\u6389\u3002</li><li>\u5982\u679C\u8BE5\u8BF7\u6C42\u4E0E\u7B2C\u4E00\u4E2A\u8BF7\u6C42\u7684\u95F4\u9694\u65F6\u95F4\u5927\u4E8E\u8BA1\u6570\u5468\u671F\uFF0C\u4E14 count \u503C\u8FD8\u5728\u9650\u6D41\u8303\u56F4\u5185\uFF0C\u5C31\u91CD\u7F6E count\u3002</li></ul><p>\u90A3\u4E48\u95EE\u9898\u6765\u4E86\uFF0C\u5982\u679C\u6709\u4E2A\u9700\u6C42\u5BF9\u4E8E\u67D0\u4E2A\u63A5\u53E3 /query \u6BCF\u5206\u949F\u6700\u591A\u5141\u8BB8\u8BBF\u95EE 200 \u6B21\uFF0C\u5047\u8BBE\u6709\u4E2A\u7528\u6237\u5728\u7B2C 59 \u79D2\u7684\u6700\u540E\u51E0\u6BEB\u79D2\u77AC\u95F4\u53D1\u9001 200 \u4E2A\u8BF7\u6C42\uFF0C\u5F53 59 \u79D2\u7ED3\u675F\u540E Counter \u6E05\u96F6\u4E86\uFF0C\u4ED6\u5728\u4E0B\u4E00\u79D2\u7684\u65F6\u5019\u53C8\u53D1\u9001 200 \u4E2A\u8BF7\u6C42\u3002</p><p>\u90A3\u4E48\u5728 1 \u79D2\u949F\u5185\u8FD9\u4E2A\u7528\u6237\u53D1\u9001\u4E86 2 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l.count++ \u7684\u903B\u8F91\u901A\u8FC7\u539F\u5B50\u8BA1\u6570\u5904\u7406\uFF0C\u8FD9\u6837\u5C31\u53EF\u4EE5\u4FDD\u8BC1 l.count \u81EA\u589E\u65F6\u4E0D\u4F1A\u88AB\u591A\u4E2A\u7EBF\u7A0B\u540C\u65F6\u6267\u884C\uFF0C<strong>\u5373\u901A\u8FC7\u539F\u5B50\u8BA1\u6570\u7684\u65B9\u5F0F\u5B9E\u73B0\u9650\u6D41\u3002</strong></p><blockquote><p>\u4E3A\u4E86\u4E0D\u5F71\u54CD\u9605\u8BFB\uFF0C\u4EE3\u7801\u8BE6\u89C1\uFF1Ahttps://github.com/lml200701158/go_demo/blob/master/current_limit/count.go</p></blockquote><h2 id="\u6ED1\u52A8\u7A97\u53E3" tabindex="-1"><a class="header-anchor" href="#\u6ED1\u52A8\u7A97\u53E3" aria-hidden="true">#</a> \u6ED1\u52A8\u7A97\u53E3</h2><p>\u6ED1\u52A8\u7A97\u53E3\u662F\u9488\u5BF9\u8BA1\u6570\u5668\u5B58\u5728\u7684\u4E34\u754C\u70B9\u7F3A\u9677\uFF0C\u6240\u8C13\u6ED1\u52A8\u7A97\u53E3\uFF08Sliding window\uFF09\u662F\u4E00\u79CD\u6D41\u91CF\u63A7\u5236\u6280\u672F\uFF0C\u8FD9\u4E2A\u8BCD\u51FA\u73B0\u5728 TCP \u534F\u8BAE\u4E2D\u3002\u6ED1\u52A8\u7A97\u53E3\u628A\u56FA\u5B9A\u65F6\u95F4\u7247\u8FDB\u884C\u5212\u5206\uFF0C\u5E76\u4E14\u968F\u7740\u65F6\u95F4\u7684\u6D41\u901D\uFF0C\u8FDB\u884C\u79FB\u52A8\uFF0C\u56FA\u5B9A\u6570\u91CF\u7684\u53EF\u4EE5\u79FB\u52A8\u7684\u683C\u5B50\uFF0C\u8FDB\u884C\u8BA1\u6570\u5E76\u5224\u65AD\u9600\u503C\u3002</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/sXFqMxQoVLHVUYY15MYFpF1D5fDtiao11JkTOP1RcxEScGNVtu1iaHKMjkZftZMZAS5UyFk7ULtZsjsMMbmqUoEw/640?wx_fmt=png" alt=""></p><p>\u4E0A\u56FE\u4E2D\u6211\u4EEC\u7528\u7EA2\u8272\u7684\u865A\u7EBF\u4EE3\u8868\u4E00\u4E2A\u65F6\u95F4\u7A97\u53E3\uFF08\u4E00\u5206\u949F\uFF09\uFF0C\u6BCF\u4E2A\u65F6\u95F4\u7A97\u53E3\u6709 6 \u4E2A\u683C\u5B50\uFF0C\u6BCF\u4E2A\u683C\u5B50\u662F 10 \u79D2\u949F\u3002\u6BCF\u8FC7 10 \u79D2\u949F\u65F6\u95F4\u7A97\u53E3\u5411\u53F3\u79FB\u52A8\u4E00\u683C\uFF0C\u53EF\u4EE5\u770B\u7EA2\u8272\u7BAD\u5934\u7684\u65B9\u5411\u3002\u6211\u4EEC\u4E3A\u6BCF\u4E2A\u683C\u5B50\u90FD\u8BBE\u7F6E\u4E00\u4E2A\u72EC\u7ACB\u7684\u8BA1\u6570\u5668 Counter\uFF0C\u5047\u5982\u4E00\u4E2A\u8BF7\u6C42\u5728 0:45 \u8BBF\u95EE\u4E86\u90A3\u4E48\u6211\u4EEC\u5C06\u7B2C\u4E94\u4E2A\u683C\u5B50\u7684\u8BA1\u6570\u5668 +1\uFF08\u4E5F\u662F\u5C31\u662F 0:40~0:50\uFF09\uFF0C\u5728\u5224\u65AD\u9650\u6D41\u7684\u65F6\u5019\u9700\u8981\u628A\u6240\u6709\u683C\u5B50\u7684\u8BA1\u6570\u52A0\u8D77\u6765\u548C\u8BBE\u5B9A\u7684\u9891\u6B21\u8FDB\u884C\u6BD4\u8F83\u5373\u53EF\u3002</p><p>\u90A3\u4E48\u6ED1\u52A8\u7A97\u53E3\u5982\u4F55\u89E3\u51B3\u6211\u4EEC\u4E0A\u9762\u9047\u5230\u7684\u95EE\u9898\u5462\uFF1F\u6765\u770B\u4E0B\u9762\u7684\u56FE\uFF1A</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/sXFqMxQoVLHVUYY15MYFpF1D5fDtiao117EDRACZWlicN0CrozU4omsVR8aHXeEsib3JhER7Y01t8SvKCicviaLXxgg/640?wx_fmt=png" alt=""></p><p>\u5F53\u7528\u6237\u5728 0:59 \u79D2\u949F\u53D1\u9001\u4E86 200 \u4E2A\u8BF7\u6C42\u5C31\u4F1A\u88AB\u7B2C\u516D\u4E2A\u683C\u5B50\u7684\u8BA1\u6570\u5668\u8BB0\u5F55 +200\uFF0C\u5F53\u4E0B\u4E00\u79D2\u7684\u65F6\u5019\u65F6\u95F4\u7A97\u53E3\u5411\u53F3\u79FB\u52A8\u4E86\u4E00\u4E2A\uFF0C\u6B64\u65F6\u8BA1\u6570\u5668\u5DF2\u7ECF\u8BB0\u5F55\u4E86\u8BE5\u7528\u6237\u53D1\u9001\u7684 200 \u4E2A\u8BF7\u6C42\uFF0C\u6240\u4EE5\u518D\u53D1\u9001\u7684\u8BDD\u5C31\u4F1A\u89E6\u53D1\u9650\u6D41\uFF0C\u5219\u62D2\u7EDD\u65B0\u7684\u8BF7\u6C42\u3002</p><p>\u5176\u5B9E\u8BA1\u6570\u5668\u5C31\u662F\u6ED1\u52A8\u7A97\u53E3\u554A\uFF0C\u53EA\u4E0D\u8FC7\u53EA\u6709\u4E00\u4E2A\u683C\u5B50\u800C\u5DF2\uFF0C\u6240\u4EE5\u60F3\u8BA9\u9650\u6D41\u505A\u7684\u66F4\u7CBE\u786E\u53EA\u9700\u8981\u5212\u5206\u66F4\u591A\u7684\u683C\u5B50\u5C31\u53EF\u4EE5\u4E86\uFF0C\u4E3A\u4E86\u66F4\u7CBE\u786E\u6211\u4EEC\u4E5F\u4E0D\u77E5\u9053\u5230\u5E95\u8BE5\u8BBE\u7F6E\u591A\u5C11\u4E2A\u683C\u5B50\uFF0C<strong>\u683C\u5B50\u7684\u6570\u91CF\u5F71\u54CD\u7740\u6ED1\u52A8\u7A97\u53E3\u7B97\u6CD5\u7684\u7CBE\u5EA6\uFF0C\u4F9D\u7136\u6709\u65F6\u95F4\u7247\u7684\u6982\u5FF5\uFF0C\u65E0\u6CD5\u6839\u672C\u89E3\u51B3\u4E34\u754C\u70B9\u95EE\u9898\u3002</strong></p><blockquote><p>\u4E3A\u4E86\u4E0D\u5F71\u54CD\u9605\u8BFB\uFF0C\u4EE3\u7801\u8BE6\u89C1\uFF1Ahttps://github.com/RussellLuo/slidingwindow</p></blockquote><h2 id="\u6F0F\u6876" tabindex="-1"><a class="header-anchor" href="#\u6F0F\u6876" aria-hidden="true">#</a> \u6F0F\u6876</h2><p>\u6F0F\u6876\u7B97\u6CD5\uFF08Leaky Bucket\uFF09\uFF0C\u539F\u7406\u5C31\u662F\u4E00\u4E2A\u56FA\u5B9A\u5BB9\u91CF\u7684\u6F0F\u6876\uFF0C\u6309\u7167\u56FA\u5B9A\u901F\u7387\u6D41\u51FA\u6C34\u6EF4\u3002</p><p>\u7528\u8FC7\u6C34\u9F99\u5934\u90FD\u77E5\u9053\uFF0C\u6253\u5F00\u9F99\u5934\u5F00\u5173\u6C34\u5C31\u4F1A\u6D41\u4E0B\u6EF4\u5230\u6C34\u6876\u91CC\uFF0C\u800C\u6F0F\u6876\u6307\u7684\u662F\u6C34\u6876\u4E0B\u9762\u6709\u4E2A\u6F0F\u6D1E\u53EF\u4EE5\u51FA\u6C34,\u5982\u679C\u6C34\u9F99\u5934\u5F00\u7684\u7279\u522B\u5927\u90A3\u4E48\u6C34\u6D41\u901F\u5C31\u4F1A\u8FC7\u5927\uFF0C\u8FD9\u6837\u5C31\u53EF\u80FD\u5BFC\u81F4\u6C34\u6876\u7684\u6C34\u6EE1\u4E86\u7136\u540E\u6EA2\u51FA\u3002</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/sXFqMxQoVLHVUYY15MYFpF1D5fDtiao11ic3Ly4IDNcADnCGUfsicicslXf2PR9ARDtasyFpVeUib2cuKsOZSiaxSqdw/640?wx_fmt=png" alt=""></p><blockquote><p>\u56FE\u7247\u5982\u679C\u770B\u4E0D\u6E05\uFF0C\u53EF\u5355\u51FB\u56FE\u7247\u5E76\u653E\u5927\u3002</p></blockquote><p>\u4E00\u4E2A\u56FA\u5B9A\u5BB9\u91CF\u7684\u6876\uFF0C\u6709\u6C34\u6D41\u8FDB\u6765\uFF0C\u4E5F\u6709\u6C34\u6D41\u51FA\u53BB\u3002\u5BF9\u4E8E\u6D41\u8FDB\u6765\u7684\u6C34\u6765\u8BF4\uFF0C\u6211\u4EEC\u65E0\u6CD5\u9884\u8BA1\u4E00\u5171\u6709\u591A\u5C11\u6C34\u4F1A\u6D41\u8FDB\u6765\uFF0C\u4E5F\u65E0\u6CD5\u9884\u8BA1\u6C34\u6D41\u7684\u901F\u5EA6\u3002\u4F46\u662F\u5BF9\u4E8E\u6D41\u51FA\u53BB\u7684\u6C34\u6765\u8BF4\uFF0C\u8FD9\u4E2A\u6876\u53EF\u4EE5\u56FA\u5B9A\u6C34\u6D41\u51FA\u7684\u901F\u7387\uFF08\u5904\u7406\u901F\u5EA6\uFF09\uFF0C\u4ECE\u800C\u8FBE\u5230\u6D41\u91CF\u6574\u5F62\u548C\u6D41\u91CF\u63A7\u5236\u7684\u6548\u679C\u3002</p><p>\u6F0F\u6876\u7B97\u6CD5\u6709\u4EE5\u4E0B\u7279\u70B9\uFF1A</p><ul><li>\u6F0F\u6876\u5177\u6709\u56FA\u5B9A\u5BB9\u91CF\uFF0C\u51FA\u6C34\u901F\u7387\u662F\u56FA\u5B9A\u5E38\u91CF\uFF08\u6D41\u51FA\u8BF7\u6C42\uFF09</li><li>\u5982\u679C\u6876\u662F\u7A7A\u7684\uFF0C\u5219\u4E0D\u9700\u6D41\u51FA\u6C34\u6EF4</li><li>\u53EF\u4EE5\u4EE5\u4EFB\u610F\u901F\u7387\u6D41\u5165\u6C34\u6EF4\u5230\u6F0F\u6876\uFF08\u6D41\u5165\u8BF7\u6C42\uFF09</li><li>\u5982\u679C\u6D41\u5165\u6C34\u6EF4\u8D85\u51FA\u4E86\u6876\u7684\u5BB9\u91CF\uFF0C\u5219\u6D41\u5165\u7684\u6C34\u6EF4\u6EA2\u51FA\uFF08\u65B0\u8BF7\u6C42\u88AB\u62D2\u7EDD\uFF09</li></ul><p>\u6F0F\u6876\u9650\u5236\u7684\u662F\u5E38\u91CF\u6D41\u51FA\u901F\u7387\uFF08\u5373\u6D41\u51FA\u901F\u7387\u662F\u4E00\u4E2A\u56FA\u5B9A\u5E38\u91CF\u503C\uFF09\uFF0C<strong>\u6240\u4EE5\u6700\u5927\u7684\u901F\u7387\u5C31\u662F\u51FA\u6C34\u7684\u901F\u7387\uFF0C\u4E0D\u80FD\u51FA\u73B0\u7A81\u53D1\u6D41\u91CF\u3002</strong></p><blockquote><p>\u4E3A\u4E86\u4E0D\u5F71\u54CD\u9605\u8BFB\uFF0C\u4EE3\u7801\u8BE6\u89C1\uFF1Ahttps://github.com/lml200701158/go_demo/blob/master/current_limit/leaky_bucket.go</p></blockquote><h2 id="\u4EE4\u724C\u6876" tabindex="-1"><a class="header-anchor" href="#\u4EE4\u724C\u6876" aria-hidden="true">#</a> \u4EE4\u724C\u6876</h2><p>\u4EE4\u724C\u6876\u7B97\u6CD5\uFF08Token Bucket\uFF09\u662F\u7F51\u7EDC\u6D41\u91CF\u6574\u5F62\uFF08Traffic Shaping\uFF09\u548C\u901F\u7387\u9650\u5236\uFF08Rate Limiting\uFF09\u4E2D\u6700\u5E38\u4F7F\u7528\u7684\u4E00\u79CD\u7B97\u6CD5\u3002\u5178\u578B\u60C5\u51B5\u4E0B\uFF0C\u4EE4\u724C\u6876\u7B97\u6CD5\u7528\u6765\u63A7\u5236\u53D1\u9001\u5230\u7F51\u7EDC\u4E0A\u7684\u6570\u636E\u7684\u6570\u76EE\uFF0C\u5E76\u5141\u8BB8\u7A81\u53D1\u6570\u636E\u7684\u53D1\u9001\u3002</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/sXFqMxQoVLHVUYY15MYFpF1D5fDtiao11icVOHT78cSGcDtjicoSxWVWic35PRlHYJWZOva2urwIToreQ9Wbq5MLbw/640?wx_fmt=png" alt=""></p><blockquote><p>\u56FE\u7247\u5982\u679C\u770B\u4E0D\u6E05\uFF0C\u53EF\u5355\u51FB\u56FE\u7247\u5E76\u653E\u5927\u3002</p></blockquote><p>\u6211\u4EEC\u6709\u4E00\u4E2A\u56FA\u5B9A\u7684\u6876\uFF0C\u6876\u91CC\u5B58\u653E\u7740\u4EE4\u724C\uFF08token\uFF09\u3002\u4E00\u5F00\u59CB\u6876\u662F\u7A7A\u7684\uFF0C\u7CFB\u7EDF\u6309\u56FA\u5B9A\u7684\u65F6\u95F4\uFF08rate\uFF09\u5F80\u6876\u91CC\u6DFB\u52A0\u4EE4\u724C\uFF0C\u76F4\u5230\u6876\u91CC\u7684\u4EE4\u724C\u6570\u6EE1\uFF0C\u591A\u4F59\u7684\u8BF7\u6C42\u4F1A\u88AB\u4E22\u5F03\u3002\u5F53\u8BF7\u6C42\u6765\u7684\u65F6\u5019\uFF0C\u4ECE\u6876\u91CC\u79FB\u9664\u4E00\u4E2A\u4EE4\u724C\uFF0C\u5982\u679C\u6876\u662F\u7A7A\u7684\u5219\u62D2\u7EDD\u8BF7\u6C42\u6216\u8005\u963B\u585E\u3002</p><p>\u4EE4\u724C\u6876\u6709\u4EE5\u4E0B\u7279\u70B9\uFF1A</p><ul><li>\u4EE4\u724C\u6309\u56FA\u5B9A\u7684\u901F\u7387\u88AB\u653E\u5165\u4EE4\u724C\u6876\u4E2D</li><li>\u6876\u4E2D\u6700\u591A\u5B58\u653E B \u4E2A\u4EE4\u724C\uFF0C\u5F53\u6876\u6EE1\u65F6\uFF0C\u65B0\u6DFB\u52A0\u7684\u4EE4\u724C\u88AB\u4E22\u5F03\u6216\u62D2\u7EDD</li><li>\u5982\u679C\u6876\u4E2D\u7684\u4EE4\u724C\u4E0D\u8DB3 N \u4E2A\uFF0C\u5219\u4E0D\u4F1A\u5220\u9664\u4EE4\u724C\uFF0C\u4E14\u8BF7\u6C42\u5C06\u88AB\u9650\u6D41\uFF08\u4E22\u5F03\u6216\u963B\u585E\u7B49\u5F85\uFF09</li></ul><p><strong>\u4EE4\u724C\u6876\u9650\u5236\u7684\u662F\u5E73\u5747\u6D41\u5165\u901F\u7387</strong>\uFF08\u5141\u8BB8\u7A81\u53D1\u8BF7\u6C42\uFF0C\u53EA\u8981\u6709\u4EE4\u724C\u5C31\u53EF\u4EE5\u5904\u7406\uFF0C\u652F\u6301\u4E00\u6B21\u62FF3\u4E2A\u4EE4\u724C\uFF0C4\u4E2A\u4EE4\u724C...\uFF09\uFF0C<strong>\u5E76\u5141\u8BB8\u4E00\u5B9A\u7A0B\u5EA6\u7A81\u53D1\u6D41\u91CF\uFF0C\u6240\u4EE5\u4E5F\u662F\u975E\u5E38\u5E38\u7528\u7684\u9650\u6D41\u7B97\u6CD5\u3002</strong></p><blockquote><p>\u4E3A\u4E86\u4E0D\u5F71\u54CD\u9605\u8BFB\uFF0C\u4EE3\u7801\u8BE6\u89C1\uFF1Ahttps://github.com/lml200701158/go_demo/blob/master/current_limit/token_bucket.go</p></blockquote><h2 id="redis-lua-\u5206\u5E03\u5F0F\u9650\u6D41" tabindex="-1"><a class="header-anchor" href="#redis-lua-\u5206\u5E03\u5F0F\u9650\u6D41" aria-hidden="true">#</a> Redis + Lua \u5206\u5E03\u5F0F\u9650\u6D41</h2><p>\u5355\u673A\u7248\u9650\u6D41\u4EC5\u80FD\u4FDD\u62A4\u81EA\u8EAB\u8282\u70B9\uFF0C\u4F46\u65E0\u6CD5\u4FDD\u62A4\u5E94\u7528\u4F9D\u8D56\u7684\u5404\u79CD\u670D\u52A1\uFF0C\u5E76\u4E14\u5728\u8FDB\u884C\u8282\u70B9\u6269\u5BB9\u3001\u7F29\u5BB9\u65F6\u4E5F\u65E0\u6CD5\u51C6\u786E\u63A7\u5236\u6574\u4E2A\u670D\u52A1\u7684\u8BF7\u6C42\u9650\u5236\u3002</p><p>\u800C\u5206\u5E03\u5F0F\u9650\u6D41\uFF0C\u4EE5\u96C6\u7FA4\u4E3A\u7EF4\u5EA6\uFF0C\u53EF\u4EE5\u65B9\u4FBF\u7684\u63A7\u5236\u8FD9\u4E2A\u96C6\u7FA4\u7684\u8BF7\u6C42\u9650\u5236\uFF0C\u4ECE\u800C\u4FDD\u62A4\u4E0B\u6E38\u4F9D\u8D56\u7684\u5404\u79CD\u670D\u52A1\u8D44\u6E90\u3002</p><p><strong>\u5206\u5E03\u5F0F\u9650\u6D41\u6700\u5173\u952E\u7684\u662F\u8981\u5C06\u9650\u6D41\u670D\u52A1\u505A\u6210\u539F\u5B50\u5316</strong>\uFF0C\u6211\u4EEC\u53EF\u4EE5\u501F\u52A9 Redis \u7684\u8BA1\u6570\u5668\uFF0CLua \u6267\u884C\u7684\u539F\u5B50\u6027\uFF0C\u8FDB\u884C\u5206\u5E03\u5F0F\u9650\u6D41\uFF0C\u5927\u81F4\u7684 Lua \u811A\u672C\u4EE3\u7801\u5982\u4E0B\uFF1A</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>local key = &quot;rate.limit:&quot; .. KEYS[1] --\u9650\u6D41KEY  
+import{_ as l}from"./plugin-vue_export-helper.21dcd24c.js";import{r as a,o as c,c as r,a as e,b as t,e as s,d as i}from"./app.615e41d8.js";const d={},o=s('<p><img src="https://mmbiz.qpic.cn/mmbiz_png/sXFqMxQoVLHVUYY15MYFpF1D5fDtiao11aXGgPFfcnNQpjThJUd2dxQnHwzDjRynia0ziaeMYr7tbQxkIfChlAicTg/640?wx_fmt=png" alt=""></p><p>\u5927\u5BB6\u597D\uFF0C\u6211\u662F\u697C\u4ED4\uFF01</p><p>\u5728\u7535\u5546\u9AD8\u5E76\u53D1\u573A\u666F\u4E0B\uFF0C\u6211\u4EEC\u7ECF\u5E38\u4F1A\u4F7F\u7528\u4E00\u4E9B\u5E38\u7528\u65B9\u6CD5\uFF0C\u53BB\u5E94\u5BF9\u6D41\u91CF\u9AD8\u5CF0\uFF0C\u6BD4\u5982<strong>\u9650\u6D41\u3001\u7194\u65AD\u3001\u964D\u7EA7</strong>\uFF0C\u4ECA\u5929\u6211\u4EEC\u804A\u804A\u9650\u6D41\u3002</p><p>\u4EC0\u4E48\u662F\u9650\u6D41\u5462\uFF1F\u9650\u6D41\u662F\u9650\u5236\u5230\u8FBE\u7CFB\u7EDF\u7684\u5E76\u53D1\u8BF7\u6C42\u6570\u91CF\uFF0C\u4FDD\u8BC1\u7CFB\u7EDF\u80FD\u591F\u6B63\u5E38\u54CD\u5E94\u90E8\u5206\u7528\u6237\u8BF7\u6C42\uFF0C\u800C\u5BF9\u4E8E\u8D85\u8FC7\u9650\u5236\u7684\u6D41\u91CF\uFF0C\u5219\u901A\u8FC7\u62D2\u7EDD\u670D\u52A1\u7684\u65B9\u5F0F\u4FDD\u8BC1\u6574\u4F53\u7CFB\u7EDF\u7684\u53EF\u7528\u6027\u3002</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/sXFqMxQoVLHVUYY15MYFpF1D5fDtiao11SePQJZST6bL83CTafTCXICicdY5y66tomZ9Pmy8ibytiaWoLPyOWIwytQ/640?wx_fmt=png" alt=""></p><p>\u6839\u636E\u9650\u6D41\u4F5C\u7528\u8303\u56F4\uFF0C\u53EF\u4EE5\u5206\u4E3A<strong>\u5355\u673A\u9650\u6D41\u548C\u5206\u5E03\u5F0F\u9650\u6D41</strong>\uFF1B\u6839\u636E\u9650\u6D41\u65B9\u5F0F\uFF0C\u53C8\u5206\u4E3A<strong>\u8BA1\u6570\u5668\u3001\u6ED1\u52A8\u7A97\u53E3\u3001\u6F0F\u6876\u548C\u4EE4\u724C\u6876\u9650\u6D41</strong>\uFF0C\u4E0B\u9762\u6211\u4EEC\u5BF9\u8FD9\u5757\u8BE6\u7EC6\u8FDB\u884C\u8BB2\u89E3\u3002</p>',6),p=i("\u6587\u7AE0\u5927\u90E8\u5206\u5185\u5BB9\u53C2\u8003 \xA0TPaper \u7684"),b={href:"https://mp.weixin.qq.com/s?__biz=MzI3MzQwNjcyNg==&mid=2247485144&idx=1&sn=ebc4bddf53ba5dd01943f0e1b1d452fa&chksm=eb2288b1dc5501a77a2108b2e439f35d09018a8b8d67b664126821bc18dc3df3272cb63dcf6e&token=854767795&lang=zh_CN&scene=21#wechat_redirect",target:"_blank",rel:"noopener noreferrer"},u=i("\u300AGo \u5B9E\u73B0\u5404\u7C7B\u9650\u6D41\u7B97\u6CD5\u300B"),m=i("\uFF0C\u7279\u6B64\u8BF4\u660E\uFF01"),h=s(`<h1 id="\u5E38\u7528\u9650\u6D41\u65B9\u5F0F" tabindex="-1"><a class="header-anchor" href="#\u5E38\u7528\u9650\u6D41\u65B9\u5F0F" aria-hidden="true">#</a> \u5E38\u7528\u9650\u6D41\u65B9\u5F0F</h1><h2 id="\u8BA1\u6570\u5668" tabindex="-1"><a class="header-anchor" href="#\u8BA1\u6570\u5668" aria-hidden="true">#</a> \u8BA1\u6570\u5668</h2><p>\u8BA1\u6570\u5668\u662F\u4E00\u79CD\u6700\u7B80\u5355\u9650\u6D41\u7B97\u6CD5\uFF0C\u5176\u539F\u7406\u5C31\u662F\uFF1A\u5728\u4E00\u6BB5\u65F6\u95F4\u95F4\u9694\u5185\uFF0C\u5BF9\u8BF7\u6C42\u8FDB\u884C\u8BA1\u6570\uFF0C\u4E0E\u9600\u503C\u8FDB\u884C\u6BD4\u8F83\u5224\u65AD\u662F\u5426\u9700\u8981\u9650\u6D41\uFF0C\u4E00\u65E6\u5230\u4E86\u65F6\u95F4\u4E34\u754C\u70B9\uFF0C\u5C06\u8BA1\u6570\u5668\u6E05\u96F6\u3002</p><p>\u8FD9\u4E2A\u5C31\u50CF\u4F60\u53BB\u5750\u8F66\u4E00\u6837\uFF0C\u8F66\u53A2\u89C4\u5B9A\u4E86\u591A\u5C11\u4E2A\u4F4D\u7F6E\uFF0C\u6EE1\u4E86\u5C31\u4E0D\u8BA9\u4E0A\u8F66\u4E86\uFF0C\u4E0D\u7136\u5C31\u662F\u8D85\u8F7D\u4E86\uFF0C\u88AB\u4EA4\u8B66\u53D4\u53D4\u6293\u5230\u4E86\u5C31\u8981\u7F5A\u6B3E\u7684\uFF0C\u5982\u679C\u6211\u4EEC\u7684\u7CFB\u7EDF\u90A3\u5C31\u4E0D\u662F\u7F5A\u6B3E\u7684\u4E8B\u60C5\u4E86\uFF0C\u53EF\u80FD\u76F4\u63A5\u5D29\u6389\u4E86\u3002</p><p>\u7A0B\u5E8F\u6267\u884C\u903B\u8F91\uFF1A</p><ul><li>\u53EF\u4EE5\u5728\u7A0B\u5E8F\u4E2D\u8BBE\u7F6E\u4E00\u4E2A\u53D8\u91CF count\uFF0C\u5F53\u8FC7\u6765\u4E00\u4E2A\u8BF7\u6C42\u6211\u5C31\u5C06\u8FD9\u4E2A\u6570 +1\uFF0C\u540C\u65F6\u8BB0\u5F55\u8BF7\u6C42\u65F6\u95F4\u3002</li><li>\u5F53\u4E0B\u4E00\u4E2A\u8BF7\u6C42\u6765\u7684\u65F6\u5019\u5224\u65AD count \u7684\u8BA1\u6570\u503C\u662F\u5426\u8D85\u8FC7\u8BBE\u5B9A\u7684\u9891\u6B21\uFF0C\u4EE5\u53CA\u5F53\u524D\u8BF7\u6C42\u7684\u65F6\u95F4\u548C\u7B2C\u4E00\u6B21\u8BF7\u6C42\u65F6\u95F4\u662F\u5426\u5728 1 \u5206\u949F\u5185\u3002</li><li>\u5982\u679C\u5728 1 \u5206\u949F\u5185\u5E76\u4E14\u8D85\u8FC7\u8BBE\u5B9A\u7684\u9891\u6B21\u5219\u8BC1\u660E\u8BF7\u6C42\u8FC7\u591A\uFF0C\u540E\u9762\u7684\u8BF7\u6C42\u5C31\u62D2\u7EDD\u6389\u3002</li><li>\u5982\u679C\u8BE5\u8BF7\u6C42\u4E0E\u7B2C\u4E00\u4E2A\u8BF7\u6C42\u7684\u95F4\u9694\u65F6\u95F4\u5927\u4E8E\u8BA1\u6570\u5468\u671F\uFF0C\u4E14 count \u503C\u8FD8\u5728\u9650\u6D41\u8303\u56F4\u5185\uFF0C\u5C31\u91CD\u7F6E count\u3002</li></ul><p>\u90A3\u4E48\u95EE\u9898\u6765\u4E86\uFF0C\u5982\u679C\u6709\u4E2A\u9700\u6C42\u5BF9\u4E8E\u67D0\u4E2A\u63A5\u53E3 /query \u6BCF\u5206\u949F\u6700\u591A\u5141\u8BB8\u8BBF\u95EE 200 \u6B21\uFF0C\u5047\u8BBE\u6709\u4E2A\u7528\u6237\u5728\u7B2C 59 \u79D2\u7684\u6700\u540E\u51E0\u6BEB\u79D2\u77AC\u95F4\u53D1\u9001 200 \u4E2A\u8BF7\u6C42\uFF0C\u5F53 59 \u79D2\u7ED3\u675F\u540E Counter \u6E05\u96F6\u4E86\uFF0C\u4ED6\u5728\u4E0B\u4E00\u79D2\u7684\u65F6\u5019\u53C8\u53D1\u9001 200 \u4E2A\u8BF7\u6C42\u3002</p><p>\u90A3\u4E48\u5728 1 \u79D2\u949F\u5185\u8FD9\u4E2A\u7528\u6237\u53D1\u9001\u4E86 2 \u500D\u7684\u8BF7\u6C42\uFF0C\u8FD9\u4E2A\u662F\u7B26\u5408\u6211\u4EEC\u7684\u8BBE\u8BA1\u903B\u8F91\u7684\uFF0C\u8FD9\u4E5F\u662F\u8BA1\u6570\u5668\u65B9\u6CD5\u7684\u8BBE\u8BA1\u7F3A\u9677\uFF0C\u7CFB\u7EDF\u53EF\u80FD\u4F1A\u627F\u53D7\u6076\u610F\u7528\u6237\u7684\u5927\u91CF\u8BF7\u6C42\uFF0C\u751A\u81F3\u51FB\u7A7F\u7CFB\u7EDF\u3002<strong>\u8FD9\u79CD\u65B9\u6CD5\u867D\u7136\u7B80\u5355\uFF0C\u4F46\u4E5F\u6709\u4E2A\u5927\u95EE\u9898\u5C31\u662F\u6CA1\u6709\u5F88\u597D\u7684\u5904\u7406\u5355\u4F4D\u65F6\u95F4\u7684\u8FB9\u754C\u3002</strong></p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/sXFqMxQoVLHVUYY15MYFpF1D5fDtiao11VLPh0WuiaSUMmcNOiaYDksmxA9TqRZnv4IedWP2scGicHdict68U1lfd5Q/640?wx_fmt=png" alt=""></p><p>\u4E0D\u8FC7\u8BF4\u5B9E\u8BDD\uFF0C\u8FD9\u4E2A\u8BA1\u6570\u5F15\u7528\u4E86\u9501\uFF0C\u5728\u9AD8\u5E76\u53D1\u573A\u666F\uFF0C\u8FD9\u4E2A\u65B9\u5F0F\u53EF\u80FD\u4E0D\u592A\u5B9E\u7528\uFF0C\u6211\u5EFA\u8BAE\u5C06\u9501\u53BB\u6389\uFF0C\u7136\u540E\u5C06 l.count++ \u7684\u903B\u8F91\u901A\u8FC7\u539F\u5B50\u8BA1\u6570\u5904\u7406\uFF0C\u8FD9\u6837\u5C31\u53EF\u4EE5\u4FDD\u8BC1 l.count \u81EA\u589E\u65F6\u4E0D\u4F1A\u88AB\u591A\u4E2A\u7EBF\u7A0B\u540C\u65F6\u6267\u884C\uFF0C<strong>\u5373\u901A\u8FC7\u539F\u5B50\u8BA1\u6570\u7684\u65B9\u5F0F\u5B9E\u73B0\u9650\u6D41\u3002</strong></p><blockquote><p>\u4E3A\u4E86\u4E0D\u5F71\u54CD\u9605\u8BFB\uFF0C\u4EE3\u7801\u8BE6\u89C1\uFF1Ahttps://github.com/lml200701158/go_demo/blob/master/current_limit/count.go</p></blockquote><h2 id="\u6ED1\u52A8\u7A97\u53E3" tabindex="-1"><a class="header-anchor" href="#\u6ED1\u52A8\u7A97\u53E3" aria-hidden="true">#</a> \u6ED1\u52A8\u7A97\u53E3</h2><p>\u6ED1\u52A8\u7A97\u53E3\u662F\u9488\u5BF9\u8BA1\u6570\u5668\u5B58\u5728\u7684\u4E34\u754C\u70B9\u7F3A\u9677\uFF0C\u6240\u8C13\u6ED1\u52A8\u7A97\u53E3\uFF08Sliding window\uFF09\u662F\u4E00\u79CD\u6D41\u91CF\u63A7\u5236\u6280\u672F\uFF0C\u8FD9\u4E2A\u8BCD\u51FA\u73B0\u5728 TCP \u534F\u8BAE\u4E2D\u3002\u6ED1\u52A8\u7A97\u53E3\u628A\u56FA\u5B9A\u65F6\u95F4\u7247\u8FDB\u884C\u5212\u5206\uFF0C\u5E76\u4E14\u968F\u7740\u65F6\u95F4\u7684\u6D41\u901D\uFF0C\u8FDB\u884C\u79FB\u52A8\uFF0C\u56FA\u5B9A\u6570\u91CF\u7684\u53EF\u4EE5\u79FB\u52A8\u7684\u683C\u5B50\uFF0C\u8FDB\u884C\u8BA1\u6570\u5E76\u5224\u65AD\u9600\u503C\u3002</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/sXFqMxQoVLHVUYY15MYFpF1D5fDtiao11JkTOP1RcxEScGNVtu1iaHKMjkZftZMZAS5UyFk7ULtZsjsMMbmqUoEw/640?wx_fmt=png" alt=""></p><p>\u4E0A\u56FE\u4E2D\u6211\u4EEC\u7528\u7EA2\u8272\u7684\u865A\u7EBF\u4EE3\u8868\u4E00\u4E2A\u65F6\u95F4\u7A97\u53E3\uFF08\u4E00\u5206\u949F\uFF09\uFF0C\u6BCF\u4E2A\u65F6\u95F4\u7A97\u53E3\u6709 6 \u4E2A\u683C\u5B50\uFF0C\u6BCF\u4E2A\u683C\u5B50\u662F 10 \u79D2\u949F\u3002\u6BCF\u8FC7 10 \u79D2\u949F\u65F6\u95F4\u7A97\u53E3\u5411\u53F3\u79FB\u52A8\u4E00\u683C\uFF0C\u53EF\u4EE5\u770B\u7EA2\u8272\u7BAD\u5934\u7684\u65B9\u5411\u3002\u6211\u4EEC\u4E3A\u6BCF\u4E2A\u683C\u5B50\u90FD\u8BBE\u7F6E\u4E00\u4E2A\u72EC\u7ACB\u7684\u8BA1\u6570\u5668 Counter\uFF0C\u5047\u5982\u4E00\u4E2A\u8BF7\u6C42\u5728 0:45 \u8BBF\u95EE\u4E86\u90A3\u4E48\u6211\u4EEC\u5C06\u7B2C\u4E94\u4E2A\u683C\u5B50\u7684\u8BA1\u6570\u5668 +1\uFF08\u4E5F\u662F\u5C31\u662F 0:40~0:50\uFF09\uFF0C\u5728\u5224\u65AD\u9650\u6D41\u7684\u65F6\u5019\u9700\u8981\u628A\u6240\u6709\u683C\u5B50\u7684\u8BA1\u6570\u52A0\u8D77\u6765\u548C\u8BBE\u5B9A\u7684\u9891\u6B21\u8FDB\u884C\u6BD4\u8F83\u5373\u53EF\u3002</p><p>\u90A3\u4E48\u6ED1\u52A8\u7A97\u53E3\u5982\u4F55\u89E3\u51B3\u6211\u4EEC\u4E0A\u9762\u9047\u5230\u7684\u95EE\u9898\u5462\uFF1F\u6765\u770B\u4E0B\u9762\u7684\u56FE\uFF1A</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/sXFqMxQoVLHVUYY15MYFpF1D5fDtiao117EDRACZWlicN0CrozU4omsVR8aHXeEsib3JhER7Y01t8SvKCicviaLXxgg/640?wx_fmt=png" alt=""></p><p>\u5F53\u7528\u6237\u5728 0:59 \u79D2\u949F\u53D1\u9001\u4E86 200 \u4E2A\u8BF7\u6C42\u5C31\u4F1A\u88AB\u7B2C\u516D\u4E2A\u683C\u5B50\u7684\u8BA1\u6570\u5668\u8BB0\u5F55 +200\uFF0C\u5F53\u4E0B\u4E00\u79D2\u7684\u65F6\u5019\u65F6\u95F4\u7A97\u53E3\u5411\u53F3\u79FB\u52A8\u4E86\u4E00\u4E2A\uFF0C\u6B64\u65F6\u8BA1\u6570\u5668\u5DF2\u7ECF\u8BB0\u5F55\u4E86\u8BE5\u7528\u6237\u53D1\u9001\u7684 200 \u4E2A\u8BF7\u6C42\uFF0C\u6240\u4EE5\u518D\u53D1\u9001\u7684\u8BDD\u5C31\u4F1A\u89E6\u53D1\u9650\u6D41\uFF0C\u5219\u62D2\u7EDD\u65B0\u7684\u8BF7\u6C42\u3002</p><p>\u5176\u5B9E\u8BA1\u6570\u5668\u5C31\u662F\u6ED1\u52A8\u7A97\u53E3\u554A\uFF0C\u53EA\u4E0D\u8FC7\u53EA\u6709\u4E00\u4E2A\u683C\u5B50\u800C\u5DF2\uFF0C\u6240\u4EE5\u60F3\u8BA9\u9650\u6D41\u505A\u7684\u66F4\u7CBE\u786E\u53EA\u9700\u8981\u5212\u5206\u66F4\u591A\u7684\u683C\u5B50\u5C31\u53EF\u4EE5\u4E86\uFF0C\u4E3A\u4E86\u66F4\u7CBE\u786E\u6211\u4EEC\u4E5F\u4E0D\u77E5\u9053\u5230\u5E95\u8BE5\u8BBE\u7F6E\u591A\u5C11\u4E2A\u683C\u5B50\uFF0C<strong>\u683C\u5B50\u7684\u6570\u91CF\u5F71\u54CD\u7740\u6ED1\u52A8\u7A97\u53E3\u7B97\u6CD5\u7684\u7CBE\u5EA6\uFF0C\u4F9D\u7136\u6709\u65F6\u95F4\u7247\u7684\u6982\u5FF5\uFF0C\u65E0\u6CD5\u6839\u672C\u89E3\u51B3\u4E34\u754C\u70B9\u95EE\u9898\u3002</strong></p><blockquote><p>\u4E3A\u4E86\u4E0D\u5F71\u54CD\u9605\u8BFB\uFF0C\u4EE3\u7801\u8BE6\u89C1\uFF1Ahttps://github.com/RussellLuo/slidingwindow</p></blockquote><h2 id="\u6F0F\u6876" tabindex="-1"><a class="header-anchor" href="#\u6F0F\u6876" aria-hidden="true">#</a> \u6F0F\u6876</h2><p>\u6F0F\u6876\u7B97\u6CD5\uFF08Leaky Bucket\uFF09\uFF0C\u539F\u7406\u5C31\u662F\u4E00\u4E2A\u56FA\u5B9A\u5BB9\u91CF\u7684\u6F0F\u6876\uFF0C\u6309\u7167\u56FA\u5B9A\u901F\u7387\u6D41\u51FA\u6C34\u6EF4\u3002</p><p>\u7528\u8FC7\u6C34\u9F99\u5934\u90FD\u77E5\u9053\uFF0C\u6253\u5F00\u9F99\u5934\u5F00\u5173\u6C34\u5C31\u4F1A\u6D41\u4E0B\u6EF4\u5230\u6C34\u6876\u91CC\uFF0C\u800C\u6F0F\u6876\u6307\u7684\u662F\u6C34\u6876\u4E0B\u9762\u6709\u4E2A\u6F0F\u6D1E\u53EF\u4EE5\u51FA\u6C34,\u5982\u679C\u6C34\u9F99\u5934\u5F00\u7684\u7279\u522B\u5927\u90A3\u4E48\u6C34\u6D41\u901F\u5C31\u4F1A\u8FC7\u5927\uFF0C\u8FD9\u6837\u5C31\u53EF\u80FD\u5BFC\u81F4\u6C34\u6876\u7684\u6C34\u6EE1\u4E86\u7136\u540E\u6EA2\u51FA\u3002</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/sXFqMxQoVLHVUYY15MYFpF1D5fDtiao11ic3Ly4IDNcADnCGUfsicicslXf2PR9ARDtasyFpVeUib2cuKsOZSiaxSqdw/640?wx_fmt=png" alt=""></p><blockquote><p>\u56FE\u7247\u5982\u679C\u770B\u4E0D\u6E05\uFF0C\u53EF\u5355\u51FB\u56FE\u7247\u5E76\u653E\u5927\u3002</p></blockquote><p>\u4E00\u4E2A\u56FA\u5B9A\u5BB9\u91CF\u7684\u6876\uFF0C\u6709\u6C34\u6D41\u8FDB\u6765\uFF0C\u4E5F\u6709\u6C34\u6D41\u51FA\u53BB\u3002\u5BF9\u4E8E\u6D41\u8FDB\u6765\u7684\u6C34\u6765\u8BF4\uFF0C\u6211\u4EEC\u65E0\u6CD5\u9884\u8BA1\u4E00\u5171\u6709\u591A\u5C11\u6C34\u4F1A\u6D41\u8FDB\u6765\uFF0C\u4E5F\u65E0\u6CD5\u9884\u8BA1\u6C34\u6D41\u7684\u901F\u5EA6\u3002\u4F46\u662F\u5BF9\u4E8E\u6D41\u51FA\u53BB\u7684\u6C34\u6765\u8BF4\uFF0C\u8FD9\u4E2A\u6876\u53EF\u4EE5\u56FA\u5B9A\u6C34\u6D41\u51FA\u7684\u901F\u7387\uFF08\u5904\u7406\u901F\u5EA6\uFF09\uFF0C\u4ECE\u800C\u8FBE\u5230\u6D41\u91CF\u6574\u5F62\u548C\u6D41\u91CF\u63A7\u5236\u7684\u6548\u679C\u3002</p><p>\u6F0F\u6876\u7B97\u6CD5\u6709\u4EE5\u4E0B\u7279\u70B9\uFF1A</p><ul><li>\u6F0F\u6876\u5177\u6709\u56FA\u5B9A\u5BB9\u91CF\uFF0C\u51FA\u6C34\u901F\u7387\u662F\u56FA\u5B9A\u5E38\u91CF\uFF08\u6D41\u51FA\u8BF7\u6C42\uFF09</li><li>\u5982\u679C\u6876\u662F\u7A7A\u7684\uFF0C\u5219\u4E0D\u9700\u6D41\u51FA\u6C34\u6EF4</li><li>\u53EF\u4EE5\u4EE5\u4EFB\u610F\u901F\u7387\u6D41\u5165\u6C34\u6EF4\u5230\u6F0F\u6876\uFF08\u6D41\u5165\u8BF7\u6C42\uFF09</li><li>\u5982\u679C\u6D41\u5165\u6C34\u6EF4\u8D85\u51FA\u4E86\u6876\u7684\u5BB9\u91CF\uFF0C\u5219\u6D41\u5165\u7684\u6C34\u6EF4\u6EA2\u51FA\uFF08\u65B0\u8BF7\u6C42\u88AB\u62D2\u7EDD\uFF09</li></ul><p>\u6F0F\u6876\u9650\u5236\u7684\u662F\u5E38\u91CF\u6D41\u51FA\u901F\u7387\uFF08\u5373\u6D41\u51FA\u901F\u7387\u662F\u4E00\u4E2A\u56FA\u5B9A\u5E38\u91CF\u503C\uFF09\uFF0C<strong>\u6240\u4EE5\u6700\u5927\u7684\u901F\u7387\u5C31\u662F\u51FA\u6C34\u7684\u901F\u7387\uFF0C\u4E0D\u80FD\u51FA\u73B0\u7A81\u53D1\u6D41\u91CF\u3002</strong></p><blockquote><p>\u4E3A\u4E86\u4E0D\u5F71\u54CD\u9605\u8BFB\uFF0C\u4EE3\u7801\u8BE6\u89C1\uFF1Ahttps://github.com/lml200701158/go_demo/blob/master/current_limit/leaky_bucket.go</p></blockquote><h2 id="\u4EE4\u724C\u6876" tabindex="-1"><a class="header-anchor" href="#\u4EE4\u724C\u6876" aria-hidden="true">#</a> \u4EE4\u724C\u6876</h2><p>\u4EE4\u724C\u6876\u7B97\u6CD5\uFF08Token Bucket\uFF09\u662F\u7F51\u7EDC\u6D41\u91CF\u6574\u5F62\uFF08Traffic Shaping\uFF09\u548C\u901F\u7387\u9650\u5236\uFF08Rate Limiting\uFF09\u4E2D\u6700\u5E38\u4F7F\u7528\u7684\u4E00\u79CD\u7B97\u6CD5\u3002\u5178\u578B\u60C5\u51B5\u4E0B\uFF0C\u4EE4\u724C\u6876\u7B97\u6CD5\u7528\u6765\u63A7\u5236\u53D1\u9001\u5230\u7F51\u7EDC\u4E0A\u7684\u6570\u636E\u7684\u6570\u76EE\uFF0C\u5E76\u5141\u8BB8\u7A81\u53D1\u6570\u636E\u7684\u53D1\u9001\u3002</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/sXFqMxQoVLHVUYY15MYFpF1D5fDtiao11icVOHT78cSGcDtjicoSxWVWic35PRlHYJWZOva2urwIToreQ9Wbq5MLbw/640?wx_fmt=png" alt=""></p><blockquote><p>\u56FE\u7247\u5982\u679C\u770B\u4E0D\u6E05\uFF0C\u53EF\u5355\u51FB\u56FE\u7247\u5E76\u653E\u5927\u3002</p></blockquote><p>\u6211\u4EEC\u6709\u4E00\u4E2A\u56FA\u5B9A\u7684\u6876\uFF0C\u6876\u91CC\u5B58\u653E\u7740\u4EE4\u724C\uFF08token\uFF09\u3002\u4E00\u5F00\u59CB\u6876\u662F\u7A7A\u7684\uFF0C\u7CFB\u7EDF\u6309\u56FA\u5B9A\u7684\u65F6\u95F4\uFF08rate\uFF09\u5F80\u6876\u91CC\u6DFB\u52A0\u4EE4\u724C\uFF0C\u76F4\u5230\u6876\u91CC\u7684\u4EE4\u724C\u6570\u6EE1\uFF0C\u591A\u4F59\u7684\u8BF7\u6C42\u4F1A\u88AB\u4E22\u5F03\u3002\u5F53\u8BF7\u6C42\u6765\u7684\u65F6\u5019\uFF0C\u4ECE\u6876\u91CC\u79FB\u9664\u4E00\u4E2A\u4EE4\u724C\uFF0C\u5982\u679C\u6876\u662F\u7A7A\u7684\u5219\u62D2\u7EDD\u8BF7\u6C42\u6216\u8005\u963B\u585E\u3002</p><p>\u4EE4\u724C\u6876\u6709\u4EE5\u4E0B\u7279\u70B9\uFF1A</p><ul><li>\u4EE4\u724C\u6309\u56FA\u5B9A\u7684\u901F\u7387\u88AB\u653E\u5165\u4EE4\u724C\u6876\u4E2D</li><li>\u6876\u4E2D\u6700\u591A\u5B58\u653E B \u4E2A\u4EE4\u724C\uFF0C\u5F53\u6876\u6EE1\u65F6\uFF0C\u65B0\u6DFB\u52A0\u7684\u4EE4\u724C\u88AB\u4E22\u5F03\u6216\u62D2\u7EDD</li><li>\u5982\u679C\u6876\u4E2D\u7684\u4EE4\u724C\u4E0D\u8DB3 N \u4E2A\uFF0C\u5219\u4E0D\u4F1A\u5220\u9664\u4EE4\u724C\uFF0C\u4E14\u8BF7\u6C42\u5C06\u88AB\u9650\u6D41\uFF08\u4E22\u5F03\u6216\u963B\u585E\u7B49\u5F85\uFF09</li></ul><p><strong>\u4EE4\u724C\u6876\u9650\u5236\u7684\u662F\u5E73\u5747\u6D41\u5165\u901F\u7387</strong>\uFF08\u5141\u8BB8\u7A81\u53D1\u8BF7\u6C42\uFF0C\u53EA\u8981\u6709\u4EE4\u724C\u5C31\u53EF\u4EE5\u5904\u7406\uFF0C\u652F\u6301\u4E00\u6B21\u62FF3\u4E2A\u4EE4\u724C\uFF0C4\u4E2A\u4EE4\u724C...\uFF09\uFF0C<strong>\u5E76\u5141\u8BB8\u4E00\u5B9A\u7A0B\u5EA6\u7A81\u53D1\u6D41\u91CF\uFF0C\u6240\u4EE5\u4E5F\u662F\u975E\u5E38\u5E38\u7528\u7684\u9650\u6D41\u7B97\u6CD5\u3002</strong></p><blockquote><p>\u4E3A\u4E86\u4E0D\u5F71\u54CD\u9605\u8BFB\uFF0C\u4EE3\u7801\u8BE6\u89C1\uFF1Ahttps://github.com/lml200701158/go_demo/blob/master/current_limit/token_bucket.go</p></blockquote><h2 id="redis-lua-\u5206\u5E03\u5F0F\u9650\u6D41" tabindex="-1"><a class="header-anchor" href="#redis-lua-\u5206\u5E03\u5F0F\u9650\u6D41" aria-hidden="true">#</a> Redis + Lua \u5206\u5E03\u5F0F\u9650\u6D41</h2><p>\u5355\u673A\u7248\u9650\u6D41\u4EC5\u80FD\u4FDD\u62A4\u81EA\u8EAB\u8282\u70B9\uFF0C\u4F46\u65E0\u6CD5\u4FDD\u62A4\u5E94\u7528\u4F9D\u8D56\u7684\u5404\u79CD\u670D\u52A1\uFF0C\u5E76\u4E14\u5728\u8FDB\u884C\u8282\u70B9\u6269\u5BB9\u3001\u7F29\u5BB9\u65F6\u4E5F\u65E0\u6CD5\u51C6\u786E\u63A7\u5236\u6574\u4E2A\u670D\u52A1\u7684\u8BF7\u6C42\u9650\u5236\u3002</p><p>\u800C\u5206\u5E03\u5F0F\u9650\u6D41\uFF0C\u4EE5\u96C6\u7FA4\u4E3A\u7EF4\u5EA6\uFF0C\u53EF\u4EE5\u65B9\u4FBF\u7684\u63A7\u5236\u8FD9\u4E2A\u96C6\u7FA4\u7684\u8BF7\u6C42\u9650\u5236\uFF0C\u4ECE\u800C\u4FDD\u62A4\u4E0B\u6E38\u4F9D\u8D56\u7684\u5404\u79CD\u670D\u52A1\u8D44\u6E90\u3002</p><p><strong>\u5206\u5E03\u5F0F\u9650\u6D41\u6700\u5173\u952E\u7684\u662F\u8981\u5C06\u9650\u6D41\u670D\u52A1\u505A\u6210\u539F\u5B50\u5316</strong>\uFF0C\u6211\u4EEC\u53EF\u4EE5\u501F\u52A9 Redis \u7684\u8BA1\u6570\u5668\uFF0CLua \u6267\u884C\u7684\u539F\u5B50\u6027\uFF0C\u8FDB\u884C\u5206\u5E03\u5F0F\u9650\u6D41\uFF0C\u5927\u81F4\u7684 Lua \u811A\u672C\u4EE3\u7801\u5982\u4E0B\uFF1A</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>local key = &quot;rate.limit:&quot; .. KEYS[1] --\u9650\u6D41KEY  
 
 local limit = tonumber(ARGV[1])        --\u9650\u6D41\u5927\u5C0F  
 
diff --git a/dist/assets/weixin-likbj.html.4138e613.js b/dist/assets/weixin-likbj.html.4138e613.js
new file mode 100644
index 00000000..292da434
--- /dev/null
+++ b/dist/assets/weixin-likbj.html.4138e613.js
@@ -0,0 +1 @@
+const e={key:"v-39c49d7e",path:"/nice-article/weixin-likbj.html",title:"\u79BB\u5F00\u5317\u4EAC\uFF1F",lang:"zh-CN",frontmatter:{title:"\u79BB\u5F00\u5317\u4EAC\uFF1F",shortTitle:"\u79BB\u5F00\u5317\u4EAC\uFF1F",author:"\u516C\u5B50\u9F99",category:["\u4F18\u8D28\u6587\u7AE0"],summary:"\u67D0\u8109\u4E0A\u6709\u4E2A\u5B57\u8282\u5458\u5DE5\u53D1\u7684\u70ED\u5E16\uFF1A \u4ECA\u5929\u548C\u9AD8\u4E2D\u540C\u5B66\u804A\u4E86\u804A\uFF0C\u5F53\u521D\u540C\u6837\u7684\u5206\u6570\u53BB\u4E86\u67D0 985\uFF0C\u4ED6\u81EA\u52A8\u5316\u6211\u8BA1\u7B97\u673A\u3002\u6BD5\u4E1A\u7684\u65F6\u5019\u6211\u4EEC\u5BBF\u820D\u5404\u4E2A\u5927\u5382\u51E0\u5341\u4E07\uFF0C\u4ED6\u4EEC\u5BBF\u820D\u90FD\u8BFB\u7814\u7559\u5728\u4E86\u4E8C\u7EBF\uFF0C\u8FDB\u4E86\u56FD\u4F01\u5341\u4E07\u51FA\u5934\uFF0C\u5BF9\u6211\u4EEC\u5B66\u9662\u7FA1\u6155\u4E0D\u5DF2\u3002 \u516D\u5E74\u8FC7\u53BB\u4E86\uFF0C\u6211\u4EEC\u5BBF\u820D\u7684\u4EBA\u8FD8\u90FD\u5728\u4E00\u7EBF\u79DF\u623F\u52A0\u73ED\uFF0C\u7126\u8651 35 \u5371\u673A\uFF0C\u6CA1\u6709\u4E00\u4E2A\u7ED3\u5A5A\u7684\u3002\u4ED6\u4EEC\u5BBF\u820D\u7684\u90FD\u5DF2\u7ECF\u5728\u4E8C\u7EBF\u4E70\u623F\u751F\u5A03\uFF0C\u6574\u5929\u5F00\u8F66\u9493\u9C7C\u905B\u72D7\uFF0C\u8FD9\u4E00\u6CE2\u6211\u4EEC\u8F93\u9EBB\u4E86\u3002 ; \u770B\u4E86\u8FD9\u6BB5",head:[["meta",{property:"og:url",content:"https://tobebetterjavaer.com/nice-article/weixin-likbj.html"}],["meta",{property:"og:site_name",content:"Java \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF"}],["meta",{property:"og:title",content:"\u79BB\u5F00\u5317\u4EAC\uFF1F"}],["meta",{property:"og:type",content:"article"}],["meta",{property:"og:updated_time",content:"2022-06-09T00:46:28.000Z"}],["meta",{property:"og:locale",content:"zh-CN"}],["meta",{property:"article:author",content:"\u516C\u5B50\u9F99"}],["meta",{property:"article:modified_time",content:"2022-06-09T00:46:28.000Z"}]]},excerpt:"",headers:[{level:2,title:"1",slug:"_1",children:[]},{level:2,title:"2",slug:"_2",children:[]},{level:2,title:"3",slug:"_3",children:[]}],git:{createdTime:1654735588e3,updatedTime:1654735588e3,contributors:[{name:"itwanger",email:"www.qing_gee@163.com",commits:1}]},readingTime:{minutes:4.6,words:1381},filePathRelative:"nice-article/weixin-likbj.md"};export{e as data};
diff --git a/dist/assets/weixin-likbj.html.a9767504.js b/dist/assets/weixin-likbj.html.a9767504.js
new file mode 100644
index 00000000..b71690a1
--- /dev/null
+++ b/dist/assets/weixin-likbj.html.a9767504.js
@@ -0,0 +1 @@
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diff --git a/dist/assets/weixin-mozdsdzfjavableetcodetxxk.html.10059c85.js b/dist/assets/weixin-mozdsdzfjavableetcodetxxk.html.10059c85.js
new file mode 100644
index 00000000..90dd5bf8
--- /dev/null
+++ b/dist/assets/weixin-mozdsdzfjavableetcodetxxk.html.10059c85.js
@@ -0,0 +1 @@
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diff --git a/dist/assets/weixin-mozdsdzfjavableetcodetxxk.html.62ab0a25.js b/dist/assets/weixin-mozdsdzfjavableetcodetxxk.html.62ab0a25.js
new file mode 100644
index 00000000..4233da33
--- /dev/null
+++ b/dist/assets/weixin-mozdsdzfjavableetcodetxxk.html.62ab0a25.js
@@ -0,0 +1 @@
+import{_ as c}from"./plugin-vue_export-helper.21dcd24c.js";import{r,o as p,c as d,a as e,b,e as t,d as a}from"./app.615e41d8.js";const i={},n=t('<p>\u4E0D\u7ECF\u610F\u95F4\uFF0C\u5728 GitHub \u4E0A\u53D1\u73B0\u4E86\u4E00\u4E2A 1G \u68D2\u7684 LeetCode \u5237\u9898\u7B14\u8BB0\uFF0C\u91CD\u70B9\u6765\u4E86\uFF0C\u662F\u7EAF\u6B63\u7684 Java \u7248\u3002\u6211\u89C1\u8FC7\u5F88\u591A\u725B\u903C\u7684\u5237\u9898\u7B14\u8BB0\uFF0C\u6709 Go \u7248\u7684\uFF0C\u6709 C++ \u7248\u7684\uFF0C\u552F\u72EC\u6CA1\u6709 Java \u7248\u7684\uFF0C\u6240\u4EE5\u8FD9\u6B21\uFF0C\u6211\u611F\u89C9\u627E\u5230\u4E86\u5B9D\u85CF\uFF01</p><p>\u8FD9\u6B21\u4E00\u6B21\u6027\u628A C/C++\u3001Java\u3001Go \u7248\u7684\u5237\u9898\u7B14\u8BB0\u5168\u90E8\u8D21\u732E\u51FA\u6765\uFF0C\u9700\u8981\u5237\u9898\u7B14\u8BB0PDF\u6587\u6863\u7684\u5C0F\u4F19\u4F34\u53EF\u4EE5\u76F4\u63A5\u957F\u6309\u626B\u7801\u5173\u6CE8\u4E0B\u65B9\u4E8C\u7EF4\u7801\uFF0C\u56DE\u590D 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LeetCode\uFF0C\u4F46\u5237\u9898\u603B\u662F\u4E09\u5929\u6253\u9C7C\u4E24\u5929\u6652\u7F51\uFF0C\u9694\u65AD\u65F6\u95F4\u518D\u53BB\u770B\u4E4B\u524D\u5237\u8FC7\u7684\u9898\u603B\u662F\u4F1A\u60F3\u4E0D\u8D77\u6765\uFF0C\u4E8E\u662F\u5C31\u840C\u53D1\u4E86\u5237\u4E00\u9053\u9898\u603B\u7ED3\u4E00\u9898\u7684\u60F3\u6CD5\u3002\u53E6\u5916\u4E00\u65B9\u9762\uFF0CLeetCode 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\u4E4B\u8DEF\u4E5F\u5C31\u6401\u6D45\u4E86\u3002\u518D\u51C6\u5907\u5237\u9898\u7684\u65F6\u5019\u5DF2\u7ECF\u662F\u5927\u56DB\u6BD5\u4E1A\u7684\u65F6\u5019\u4E86\u3002</p><p>\u4F5C\u8005\u5728\u5237\u524D\u51E0\u9053\u9898\u7684\u65F6\u5019\u4E5F\u5F88\u6162\uFF0C\u5F88\u591A\u90FD\u6CA1\u6709\u601D\u8DEF\uFF0C\u53EA\u80FD\u9760\u522B\u4EBA\u7684\u89E3\u9898\u601D\u8DEF\u624D\u52C9\u5F3A\u8FC7\u5173\u3002\u5C24\u5176\u662F\u7B2C 5 \u9898\u6C42\u6700\u957F\u56DE\u6587\u5E8F\u5217\uFF0C\u7528\u4E86\u597D\u591A\u5929\u624D\u628A\u6240\u6709\u89E3\u6CD5\u90FD\u603B\u7ED3\u4E86\u51FA\u6765\u3002</p><p>\u7B49\u5230\u4F5C\u8005\u5237\u5B8C 100 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\u5730\u5740\uFF1Ahttps://github.com/wind-liang/leetcode</p></blockquote><p>\u9664\u4E86 Java \u7248\u7684\uFF0C\u8FD8\u6709 Go \u7248\u7684\u3002\u8FD9\u4EFD\u7B14\u8BB0\u91CC\u9762\u5171\u5305\u542B\u4F5C\u8005\u5237LeetCode\u7B97\u6CD5\u9898\u540E\u6574\u7406\u7684\u6570\u767E\u9053\u9898\uFF0C\u6BCF\u9053\u9898\u5747\u9644\u6709\u8BE6\u7EC6\u9898\u89E3\u8FC7\u7A0B\u3002\u5F88\u591A\u4EBA\u8868\u793A\u5237\u6570\u636E\u7ED3\u6784\u548C\u7B97\u6CD5\u9898\u6548\u7387\u4E0D\u9AD8\uFF0C\u751A\u662F\u75DB\u82E6\u3002\u6709\u4E86\u8FD9\u4E2A\u7B14\u8BB0\u7684\u603B\u7ED3\uFF0C\u5BF9\u6821\u62DB\u548C\u793E\u62DB\u7684\u7B97\u6CD5\u5237\u9898\u5E2E\u52A9\u4E4B\u5927\u4E0D\u8A00\u800C\u55BB\uFF0C\u679C\u65AD\u6536\u85CF\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/weixin-mozdsdzfjavableetcodetxxk-33e1bd88-9fa0-4ac5-9da6-b6e26407a140.jpg" alt=""></p><p><img 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new file mode 100644
index 00000000..891b1ac5
--- /dev/null
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--- /dev/null
+++ b/dist/assets/weixin-piaolwzjztqdtskwlzfpdf.html.ef3235a6.js
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index 00000000..57d49a2c
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@@ -0,0 +1,49 @@
+import{_ as t}from"./plugin-vue_export-helper.21dcd24c.js";import{r as n,o as c,c as r,a as i,b as a,e as l,d as e}from"./app.615e41d8.js";const o={},p=l(`<h2 id="\u524D\u8A00" tabindex="-1"><a class="header-anchor" href="#\u524D\u8A00" aria-hidden="true">#</a> \u524D\u8A00</h2><p>\u5927\u5BB6\u597D\uFF0C\u6211\u662F<strong>\u9C7C\u76AE\u3002</strong></p><p>\u6700\u8FD1\u6709\u7C89\u4E1D\u79C1\u4FE1\u8BF4\u88ABoppo\u7684\u540E\u7AEF\u9762\u8BD5\u95EE\u9EBB\u4E86,\u6240\u4EE5\u4ECA\u5929\u7ED9\u5927\u5BB6\u63A8\u8350\u4E00\u7BC7\u6574\u7406\u4E8616\u9053oppo\u9762\u8BD5\u771F\u9898\u7B54\u6848\u7684\u6587\u7AE0\u3002\u5E0C\u671B\u5BF9\u5927\u5BB6\u6709\u5E2E\u52A9\u54C8\uFF0C\u4E00\u8D77\u5B66\u4E60\uFF0C\u4E00\u8D77\u8FDB\u6B65\u3002</p><ol><li>\u804A\u804A\u4F60\u5370\u8C61\u6700\u6DF1\u523B\u7684\u9879\u76EE\uFF0C\u6216\u8005\u505A\u4E86\u4EC0\u4E48\u4F18\u5316\u3002</li><li>\u4F60\u9879\u76EE\u63D0\u5230\u5206\u5E03\u5F0F\u9501\uFF0C\u4F60\u4EEC\u662F\u600E\u4E48\u4F7F\u7528\u5206\u5E03\u5F0F\u9501\u7684?</li><li>\u5E38\u89C1\u5206\u5E03\u5F0F\u4E8B\u52A1\u89E3\u51B3\u65B9\u6848</li><li>\u4F60\u4EEC\u7684\u63A5\u53E3\u5E42\u7B49\u662F\u5982\u4F55\u4FDD\u8BC1\u7684\uFF1F</li><li>\u4F60\u4EEC\u7684MySQL\u67B6\u6784\u662F\u600E\u6837\u7684\uFF1F</li><li>\u5E38\u89C1\u7684\u7D22\u5F15\u7ED3\u6784\u6709\uFF1F\u54C8\u5E0C\u8868\u7ED3\u6784\u5C5E\u4E8E\u54EA\u79CD\u573A\u666F\uFF1F</li><li>\u7ED9\u4F60ab,ac,abc\u5B57\u6BB5\uFF0C\u4F60\u662F\u5982\u4F55\u52A0\u7D22\u5F15\u7684\uFF1F</li><li>\u6570\u636E\u5E93\u9694\u79BB\u7EA7\u522B\u662F\u5426\u4E86\u89E3\uFF1F\u4F60\u4EEC\u7684\u6570\u636E\u5E93\u9ED8\u8BA4\u9694\u79BB\u7EA7\u522B\u662F\uFF1F\u4E3A\u4EC0\u4E48\u9009\u5B83\uFF1F</li><li>RR\u9694\u79BB\u7EA7\u522B\u5B9E\u73B0\u539F\u7406\uFF0C\u5B83\u662F\u5982\u4F55\u89E3\u51B3\u4E0D\u53EF\u91CD\u590D\u8BFB\u7684\uFF1F</li><li>\u4F60\u4EEC\u9879\u76EE\u4F7F\u7528\u4E86RocketMQ\u5BF9\u5427\uFF1F\u90A3\u4F60\u77E5\u9053\u5982\u4F55\u4FDD\u8BC1\u6D88\u606F\u4E0D\u4E22\u5931\u5417\uFF1F</li><li>\u4E8B\u52A1\u6D88\u606F\u662F\u5426\u4E86\u89E3\uFF1F\u573A\u666F\u9898\uFF1A\u6BD4\u5982\u4E0B\u5355\u6E05\u7A7A\u8D2D\u7269\u8F66\uFF0C\u4F60\u662F\u5982\u4F55\u8BBE\u8BA1\u7684\uFF1F</li><li>\u5982\u4F55\u5FEB\u901F\u5224\u65AD\u4E00\u4E2A\u6570\u662F\u5947\u6570\u8FD8\u662F\u5076\u6570\uFF0C\u9664\u5F00\u5BF92\u53D6\u4F59\u5462\u3002</li><li>Spring\u58F0\u660E\u5F0F\u4E8B\u52A1\u539F\u7406\uFF1F\u54EA\u4E9B\u573A\u666F\u4E8B\u52A1\u4F1A\u5931\u6548\uFF1F</li><li>\u4F60\u4EEC\u662F\u5FAE\u670D\u52A1\u67B6\u6784\u561B\uFF1F\u5982\u679C\u4F60\u6765\u8BBE\u8BA1\u4E00\u4E2A\u7C7B\u4F3C\u6DD8\u5B9D\u7684\u7CFB\u7EDF\uFF0C\u4F60\u600E\u4E48\u5212\u5206\u5FAE\u670D\u52A1\uFF1F</li><li>\u4F60\u4EEC\u662F\u600E\u4E48\u5206\u5E93\u5206\u8868\u7684\uFF1F\u5206\u5E03\u5F0FID\u5982\u4F55\u751F\u6210\uFF1F</li><li>\u6240\u6709\u5F02\u5E38\u7684\u5171\u540C\u7956\u5148\u662F\uFF1F\u8FD0\u884C\u65F6\u5F02\u5E38\u6709\u54EA\u51E0\u4E2A\uFF1F</li></ol><h2 id="_1-\u804A\u804A\u4F60\u5370\u8C61\u6700\u6DF1\u523B\u7684\u9879\u76EE-\u6216\u8005\u505A\u4E86\u4EC0\u4E48\u4F18\u5316\u3002" tabindex="-1"><a class="header-anchor" href="#_1-\u804A\u804A\u4F60\u5370\u8C61\u6700\u6DF1\u523B\u7684\u9879\u76EE-\u6216\u8005\u505A\u4E86\u4EC0\u4E48\u4F18\u5316\u3002" aria-hidden="true">#</a> 1. \u804A\u804A\u4F60\u5370\u8C61\u6700\u6DF1\u523B\u7684\u9879\u76EE\uFF0C\u6216\u8005\u505A\u4E86\u4EC0\u4E48\u4F18\u5316\u3002</h2><p>\u5927\u5BB6\u5E73\u65F6\u505A\u7684\u9879\u76EE\uFF0C\u5982\u679C\u5F88\u591A\u77E5\u8BC6\u70B9\u8DDF\u9762\u8BD5\u516B\u80A1\u6587\u76F8\u5173\u7684\u8BDD\uFF0C\u5C31\u53EF\u4EE5\u76F8\u5BF9\u6761\u7406\u6E05\u6670\u5730\u5199\u5230\u7B80\u5386\u53BB\u3002</p><ul><li>\u6BD4\u5982\u7F13\u5B58\u6570\u636E\u5E93\u76F8\u5173\u7684\uFF0C\u67E5\u8BE2\u4E3A\u7A7A\uFF0C\u4F60\u8BBE\u7F6E\u4E86\u4E00\u4E2A<code>-1</code>\u5230\u7F13\u5B58\uFF0C\u4EE3\u8868\u6570\u636E\u5E93\u6CA1\u8BB0\u5F55\u3002\u4E0B\u6B21\u5224\u65AD<code>-1</code>\uFF0C\u5C31\u4E0D\u67E5\u5E93\u4E86\uFF0C\u4EE5\u89E3\u51B3\u7F13\u5B58\u7A7F\u900F\u95EE\u9898\u3002</li><li>\u53C8\u6BD4\u5982\u4F60\u8BBE\u7F6E\u7F13\u5B58\u8FC7\u671F\u65F6\u95F4\u6BD4\u8F83\u5206\u6563\uFF0C\u89E3\u51B3\u7F13\u5B58\u51FB\u7A7F\u95EE\u9898\uFF0C\u90FD\u53EF\u4EE5\u6761\u7406\u6E05\u6670\u5199\u5230\u7B80\u5386\u53BB\uFF0C\u8FD9\u6837\u9762\u8BD5\u5B98\u5F88\u53EF\u80FD\u4F1A\u95EE\u4F60\u76F8\u5173\u7684\u95EE\u9898\uFF0C\u8FD9\u65F6\u5019\u5C31\u5BF9\u7B54\u5982\u6D41\u5566\u3002</li></ul><p>\u8FD8\u6709\u5E73\u65F6\u4F60\u505A\u7684\u9879\u76EE\uFF0C\u6709\u4E00\u4E9B\u6BD4\u8F83\u597D\u7684\u8BBE\u8BA1\uFF0C\u90FD\u53EF\u4EE5\u8BF4\u4E00\u4E0B\u54C8\uFF0C\u6BD4\u5982\u4F60\u662F\u5982\u4F55\u4FDD\u8BC1\u6570\u636E\u4E00\u81F4\u6027\u7684\uFF0C\u600E\u4E48\u4F18\u5316\u63A5\u53E3\u6027\u80FD\u7684\u3002</p><ul><li>\u5982\u679C\u662F\u8BB2<strong>\u4F18\u5316\u63A5\u53E3</strong>\u8FD9\u4E00\u5757\u7684\u8BDD\uFF0C\u5176\u5B9E\u5C31\u662F<strong>\u7F13\u5B58\u3001\u5206\u6279\u3001\u5E76\u53D1\u8C03\u7528\u3001\u5F02\u6B65</strong>\u7B49\u90A3\u51E0\u4E2A\u5173\u952E\u77E5\u8BC6\u70B9\u3002</li><li>\u5982\u679C\u662F\u4EE3\u7801\u4F18\u5316\u7EC6\u8282\uFF0C\u4F60\u53EF\u4EE5\u6311\u4E2A\u7B80\u5355\u7684\u6765\u8BB2\uFF0C\u6BD4\u5982<strong>\u590D\u6742\u7684if\u903B\u8F91\u6761\u4EF6\uFF0C\u53EF\u4EE5\u8C03\u6574\u987A\u5E8F\uFF0C\u8BA9\u7A0B\u5E8F\u66F4\u9AD8\u6548</strong>\uFF0C\u8FD9\u6837\u4F1A\u8BA9\u9762\u8BD5\u5B98\u773C\u524D\u4E00\u4EAE\u54E6\u3002</li></ul><h2 id="_2-\u4F60\u9879\u76EE\u63D0\u5230\u5206\u5E03\u5F0F\u9501-\u4F60\u4EEC\u662F\u600E\u4E48\u4F7F\u7528\u5206\u5E03\u5F0F\u9501\u7684" tabindex="-1"><a class="header-anchor" href="#_2-\u4F60\u9879\u76EE\u63D0\u5230\u5206\u5E03\u5F0F\u9501-\u4F60\u4EEC\u662F\u600E\u4E48\u4F7F\u7528\u5206\u5E03\u5F0F\u9501\u7684" aria-hidden="true">#</a> 2. \u4F60\u9879\u76EE\u63D0\u5230\u5206\u5E03\u5F0F\u9501\uFF0C\u4F60\u4EEC\u662F\u600E\u4E48\u4F7F\u7528\u5206\u5E03\u5F0F\u9501\u7684?</h2><p>\u4E00\u822C\u4F60\u8BB2\u8FF0\u4F60\u505A\u7684\u9879\u76EE\u65F6\uFF0C\u9762\u8BD5\u5B98\u4F1A\u6839\u636E\u4F60\u9879\u76EE\u6D89\u53CA\u7684\u4E00\u4E9B\u9762\u8BD5\u70B9\uFF0C\u7136\u540E\u62BD\u4ED6\u611F\u5174\u8DA3\u7684\u4E00\u4E24\u4E2A\u6765\u95EE\u3002\u6240\u4EE5\u5927\u5BB6\u5BF9\u54EA\u4E9B\u77E5\u8BC6\u70B9\u719F\u6089\uFF0C\u8BB2\u8FF0\u9879\u76EE\u65F6\uFF0C\u5C31\u8BF4\u4F60\u7528\u8BE5\u77E5\u8BC6\u70B9\uFF0C\u89E3\u51B3\u4E86\u4EC0\u4E48\u95EE\u9898\u3002</p><h2 id="_3-\u5E38\u89C1\u5206\u5E03\u5F0F\u4E8B\u52A1\u89E3\u51B3\u65B9\u6848" tabindex="-1"><a class="header-anchor" href="#_3-\u5E38\u89C1\u5206\u5E03\u5F0F\u4E8B\u52A1\u89E3\u51B3\u65B9\u6848" aria-hidden="true">#</a> 3. \u5E38\u89C1\u5206\u5E03\u5F0F\u4E8B\u52A1\u89E3\u51B3\u65B9\u6848</h2><blockquote><p><strong>\u5206\u5E03\u5F0F\u4E8B\u52A1</strong>\uFF1A\u5C31\u662F\u6307\u4E8B\u52A1\u7684\u53C2\u4E0E\u8005\u3001\u652F\u6301\u4E8B\u52A1\u7684\u670D\u52A1\u5668\u3001\u8D44\u6E90\u670D\u52A1\u5668\u4EE5\u53CA\u4E8B\u52A1\u7BA1\u7406\u5668\u5206\u522B\u4F4D\u4E8E\u4E0D\u540C\u7684\u5206\u5E03\u5F0F\u7CFB\u7EDF\u7684\u4E0D\u540C\u8282\u70B9\u4E4B\u4E0A\u3002\u7B80\u5355\u6765\u8BF4\uFF0C\u5206\u5E03\u5F0F\u4E8B\u52A1\u6307\u7684\u5C31\u662F\u5206\u5E03\u5F0F\u7CFB\u7EDF\u4E2D\u7684\u4E8B\u52A1\uFF0C\u5B83\u7684\u5B58\u5728\u5C31\u662F\u4E3A\u4E86\u4FDD\u8BC1\u4E0D\u540C\u6570\u636E\u5E93\u8282\u70B9\u7684\u6570\u636E\u4E00\u81F4\u6027\u3002</p></blockquote><p>\u804A\u5230\u5206\u5E03\u5F0F\u4E8B\u52A1\uFF0C\u5927\u5BB6\u8BB0\u5F97\u8FD9\u4E24\u4E2A\u7406\u8BBA\u54C8\uFF1A<strong>CAP\u7406\u8BBA \u548C BASE \u7406\u8BBA</strong></p><p>\u5206\u5E03\u5F0F\u4E8B\u52A1\u7684\u51E0\u79CD\u89E3\u51B3\u65B9\u6848\uFF1A</p><ul><li>2PC(\u4E8C\u9636\u6BB5\u63D0\u4EA4)\u65B9\u6848\u30013PC</li><li>TCC\uFF08Try\u3001Confirm\u3001Cancel\uFF09</li><li>\u672C\u5730\u6D88\u606F\u8868</li><li>\u6700\u5927\u52AA\u529B\u901A\u77E5</li><li>seata</li></ul><p><strong>2PC(\u4E8C\u9636\u6BB5\u63D0\u4EA4)\u65B9\u6848</strong></p><p>2PC\uFF0C\u5373\u4E24\u9636\u6BB5\u63D0\u4EA4\uFF0C\u5B83\u5C06\u5206\u5E03\u5F0F\u4E8B\u52A1\u7684\u63D0\u4EA4\u62C6\u5206\u4E3A2\u4E2A\u9636\u6BB5\uFF1A<code>prepare\u548Ccommit/rollback</code>\uFF0C\u5373\u51C6\u5907\u9636\u6BB5\u548C\u63D0\u4EA4\u6267\u884C\u9636\u6BB5\u3002\u5728prepare\u51C6\u5907\u9636\u6BB5\u9700\u8981\u7B49\u5F85\u6240\u6709\u53C2\u4E0E\u5B50\u4E8B\u52A1\u7684\u53CD\u9988\uFF0C\u56E0\u6B64\u53EF\u80FD\u9020\u6210\u6570\u636E\u5E93\u8D44\u6E90\u9501\u5B9A\u65F6\u95F4\u8FC7\u957F\uFF0C\u4E0D\u9002\u5408\u5E76\u53D1\u9AD8\u4EE5\u53CA\u5B50\u4E8B\u52A1\u751F\u547D\u5468\u957F\u8F83\u957F\u7684\u4E1A\u52A1\u573A\u666F\u3002\u5E76\u4E14\u534F\u8C03\u8005\u5B95\u673A\u7684\u8BDD\uFF0C\u6240\u6709\u7684\u53C2\u4E0E\u8005\u90FD\u6536\u4E0D\u5230\u63D0\u4EA4\u6216\u56DE\u6EDA\u6307\u4EE4\u3002</p><p><strong>3PC</strong></p><p>\u4E24\u9636\u6BB5\u63D0\u4EA4\u5206\u522B\u662F\uFF1A<code>CanCommit\uFF0CPreCommit \u548C doCommit</code>\uFF0C\u8FD9\u91CC\u4E0D\u518D\u8BE6\u8FF0\u30023PC \u5229\u7528\u8D85\u65F6\u673A\u5236\u89E3\u51B3\u4E86 2PC \u7684\u540C\u6B65\u963B\u585E\u95EE\u9898\uFF0C\u907F\u514D\u8D44\u6E90\u88AB\u6C38\u4E45\u9501\u5B9A\uFF0C\u8FDB\u4E00\u6B65\u52A0\u5F3A\u4E86\u6574\u4E2A\u4E8B\u52A1\u8FC7\u7A0B\u7684\u53EF\u9760\u6027\u3002\u4F46\u662F 3PC \u540C\u6837\u65E0\u6CD5\u5E94\u5BF9\u7C7B\u4F3C\u7684\u5B95\u673A\u95EE\u9898\uFF0C\u53EA\u4E0D\u8FC7\u51FA\u73B0\u591A\u6570\u636E\u6E90\u4E2D\u6570\u636E\u4E0D\u4E00\u81F4\u95EE\u9898\u7684\u6982\u7387\u66F4\u5C0F\u3002</p><p><strong>TCC</strong></p><p>TCC \u91C7\u7528\u4E86\u8865\u507F\u673A\u5236\uFF0C\u5176\u6838\u5FC3\u601D\u60F3\u662F\uFF1A\u9488\u5BF9\u6BCF\u4E2A\u64CD\u4F5C\uFF0C\u90FD\u8981\u6CE8\u518C\u4E00\u4E2A\u4E0E\u5176\u5BF9\u5E94\u7684\u786E\u8BA4\u548C\u8865\u507F\uFF08\u64A4\u9500\uFF09\u64CD\u4F5C\u3002\u5B83\u5206\u4E3A\u4E09\u4E2A\u9636\u6BB5\uFF1A<code>Try-Confirm-Cancel</code></p><ul><li>try\u9636\u6BB5\uFF1A\u5C1D\u8BD5\u53BB\u6267\u884C\uFF0C\u5B8C\u6210\u6240\u6709\u4E1A\u52A1\u7684\u4E00\u81F4\u6027\u68C0\u67E5\uFF0C\u9884\u7559\u5FC5\u987B\u7684\u4E1A\u52A1\u8D44\u6E90\u3002</li><li>Confirm\u9636\u6BB5\uFF1A\u8BE5\u9636\u6BB5\u5BF9\u4E1A\u52A1\u8FDB\u884C\u786E\u8BA4\u63D0\u4EA4\uFF0C\u4E0D\u505A\u4EFB\u4F55\u68C0\u67E5\uFF0C\u56E0\u4E3Atry\u9636\u6BB5\u5DF2\u7ECF\u68C0\u67E5\u8FC7\u4E86\uFF0C\u9ED8\u8BA4Confirm\u9636\u6BB5\u662F\u4E0D\u4F1A\u51FA\u9519\u7684\u3002</li><li>Cancel \u9636\u6BB5\uFF1A\u82E5\u4E1A\u52A1\u6267\u884C\u5931\u8D25\uFF0C\u5219\u8FDB\u5165\u8BE5\u9636\u6BB5\uFF0C\u5B83\u4F1A\u91CA\u653Etry\u9636\u6BB5\u5360\u7528\u7684\u6240\u6709\u4E1A\u52A1\u8D44\u6E90\uFF0C\u5E76\u56DE\u6EDAConfirm\u9636\u6BB5\u6267\u884C\u7684\u6240\u6709\u64CD\u4F5C\u3002</li></ul><p>TCC\u65B9\u6848\u8BA9\u5E94\u7528\u53EF\u4EE5\u81EA\u5B9A\u4E49\u6570\u636E\u5E93\u64CD\u4F5C\u7684\u7C92\u5EA6\uFF0C\u964D\u4F4E\u4E86\u9501\u51B2\u7A81\uFF0C\u53EF\u4EE5\u63D0\u5347\u6027\u80FD\u3002\u4F46\u662F\u5E94\u7528\u4FB5\u5165\u6027\u5F3A\uFF0Ctry\u3001confirm\u3001cancel\u4E09\u4E2A\u9636\u6BB5\u90FD\u9700\u8981\u4E1A\u52A1\u903B\u8F91\u5B9E\u73B0\u3002</p><p><strong>\u672C\u5730\u6D88\u606F\u8868</strong></p><p>ebay\u6700\u521D\u63D0\u51FA\u672C\u5730\u6D88\u606F\u8868\u8FD9\u4E2A\u65B9\u6848\uFF0C\u6765\u89E3\u51B3\u5206\u5E03\u5F0F\u4E8B\u52A1\u95EE\u9898\u3002\u4E1A\u754C\u76EE\u524D\u4F7F\u7528\u8FD9\u79CD\u65B9\u6848\u662F\u6BD4\u8F83\u591A\u7684\uFF0C\u5B83\u7684\u6838\u5FC3\u601D\u60F3\u5C31\u662F\u5C06\u5206\u5E03\u5F0F\u4E8B\u52A1\u62C6\u5206\u6210\u672C\u5730\u4E8B\u52A1\u8FDB\u884C\u5904\u7406\u3002\u53EF\u4EE5\u770B\u4E00\u4E0B\u57FA\u672C\u7684\u5B9E\u73B0\u6D41\u7A0B\u56FE\uFF1A</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PoF8jo1Pmpyab6GY4OsOf8bARCwJPIAibT2KKJWXTtgIC96nlbAhQfKvesxs5IPsu6y0Y1vHWiboicWc1J4Wca6XA/640?wx_fmt=png" alt=""></p><p><strong>\u6700\u5927\u52AA\u529B\u901A\u77E5</strong></p><p>\u6700\u5927\u52AA\u529B\u901A\u77E5\u65B9\u6848\u7684\u76EE\u6807\uFF0C\u5C31\u662F\u53D1\u8D77\u901A\u77E5\u65B9\u901A\u8FC7\u4E00\u5B9A\u7684\u673A\u5236\uFF0C\u6700\u5927\u52AA\u529B\u5C06\u4E1A\u52A1\u5904\u7406\u7ED3\u679C\u901A\u77E5\u5230\u63A5\u6536\u65B9\u3002</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PoF8jo1Pmpyab6GY4OsOf8bARCwJPIAibiaf6TKxuMuJ4ECYJD30sJBU9kicsxFn0DRTzDEspCBhNJfWC8zubQQ5A/640?wx_fmt=png" alt=""></p><p><strong>seata</strong></p><p>Saga \u6A21\u5F0F\u662F Seata \u63D0\u4F9B\u7684\u957F\u4E8B\u52A1\u89E3\u51B3\u65B9\u6848\u3002\u6838\u5FC3\u601D\u60F3\u662F\u5C06\u957F\u4E8B\u52A1\u62C6\u5206\u4E3A\u591A\u4E2A\u672C\u5730\u77ED\u4E8B\u52A1\uFF0C\u7531Saga\u4E8B\u52A1\u534F\u8C03\u5668\u534F\u8C03\uFF0C\u5982\u679C\u6B63\u5E38\u7ED3\u675F\u90A3\u5C31\u6B63\u5E38\u5B8C\u6210\uFF0C\u5982\u679C\u67D0\u4E2A\u6B65\u9AA4\u5931\u8D25\uFF0C\u5219\u6839\u636E\u76F8\u53CD\u987A\u5E8F\u4E00\u6B21\u8C03\u7528\u8865\u507F\u64CD\u4F5C\u3002</p><p>Saga\u7684\u5E76\u53D1\u5EA6\u9AD8\uFF0C\u4F46\u662F\u4E00\u81F4\u6027\u5F31\uFF0C\u5BF9\u4E8E\u8F6C\u8D26\uFF0C\u53EF\u80FD\u53D1\u751F\u7528\u6237\u5DF2\u6263\u6B3E\uFF0C\u6700\u540E\u8F6C\u8D26\u53C8\u5931\u8D25\u7684\u60C5\u51B5\u3002</p><h2 id="_4-\u4F60\u4EEC\u7684\u63A5\u53E3\u5E42\u7B49\u662F\u5982\u4F55\u4FDD\u8BC1\u7684" tabindex="-1"><a class="header-anchor" href="#_4-\u4F60\u4EEC\u7684\u63A5\u53E3\u5E42\u7B49\u662F\u5982\u4F55\u4FDD\u8BC1\u7684" aria-hidden="true">#</a> 4. \u4F60\u4EEC\u7684\u63A5\u53E3\u5E42\u7B49\u662F\u5982\u4F55\u4FDD\u8BC1\u7684\uFF1F</h2><p>\u5982\u679C\u4F60\u8C03\u7528\u4E0B\u6E38\u63A5\u53E3\u8D85\u65F6\u4E86\uFF0C\u662F\u4E0D\u662F\u8003\u8651\u91CD\u8BD5\uFF1F\u5982\u679C\u91CD\u8BD5\uFF0C\u4E0B\u6E38\u63A5\u53E3\u5C31\u9700\u8981\u652F\u6301\u5E42\u7B49\u5566\u3002</p><p>\u5B9E\u73B0\u5E42\u7B49\u4E00\u822C\u6709\u8FD98\u79CD\u65B9\u6848\uFF1A</p><ul><li>select+insert+\u4E3B\u952E/\u552F\u4E00\u7D22\u5F15\u51B2\u7A81</li><li>\u76F4\u63A5insert + \u4E3B\u952E/\u552F\u4E00\u7D22\u5F15\u51B2\u7A81</li><li>\u72B6\u6001\u673A\u5E42\u7B49</li><li>\u62BD\u53D6\u9632\u91CD\u8868</li><li>token\u4EE4\u724C</li><li>\u60B2\u89C2\u9501(\u5982select for update\uFF0C\u5F88\u5C11\u7528)</li><li>\u4E50\u89C2\u9501</li><li>\u5206\u5E03\u5F0F\u9501</li></ul><p>\u5927\u5BB6\u5E73\u65F6\u662F\u7528\u54EA\u4E2A\u65B9\u6848\u89E3\u51B3\u5E42\u7B49\u7684\uFF0C\u6700\u540E\u7ED3\u5408\u5DE5\u4F5C\u5B9E\u9645\u8BB2\u8BB2\u54C8\u3002</p><h2 id="_5-\u4F60\u4EEC\u7684mysql\u67B6\u6784\u662F\u600E\u6837\u7684" tabindex="-1"><a class="header-anchor" href="#_5-\u4F60\u4EEC\u7684mysql\u67B6\u6784\u662F\u600E\u6837\u7684" aria-hidden="true">#</a> 5. \u4F60\u4EEC\u7684mySQL\u67B6\u6784\u662F\u600E\u6837\u7684\uFF1F</h2><p>\u5927\u5BB6\u53EF\u4EE5\u7ED3\u5408\u81EA\u5DF1\u516C\u53F8\u7684MySQL\u67B6\u6784\u804A\u804A\u3002</p><p>\u6570\u636E\u7684\u5E93\u9AD8\u53EF\u7528\u65B9\u6848</p><ul><li>\u53CC\u673A\u4E3B\u5907</li><li>\u4E00\u4E3B\u4E00\u4ECE</li><li>\u4E00\u4E3B\u591A\u4ECE</li><li>MariaDB\u540C\u6B65\u591A\u4E3B\u673A</li><li>\u6570\u636E\u5E93\u4E2D\u95F4\u4EF6</li></ul><h3 id="_5-1-\u53CC\u673A\u4E3B\u5907" tabindex="-1"><a class="header-anchor" href="#_5-1-\u53CC\u673A\u4E3B\u5907" aria-hidden="true">#</a> 5.1 \u53CC\u673A\u4E3B\u5907</h3><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PoF8jo1Pmpyab6GY4OsOf8bARCwJPIAibMrsSWww1lBtazR0jGJic8wz8U4sp8YIfneMBMibpKBysJUOgUmH02eeA/640?wx_fmt=png" alt=""></p><ul><li>\u4F18\u70B9\uFF1A\u4E00\u4E2A\u673A\u5668\u6545\u969C\u4E86\u53EF\u4EE5\u81EA\u52A8\u5207\u6362\uFF0C\u64CD\u4F5C\u6BD4\u8F83\u7B80\u5355\u3002</li><li>\u7F3A\u70B9\uFF1A\u53EA\u6709\u4E00\u4E2A\u5E93\u5728\u5DE5\u4F5C\uFF0C\u8BFB\u5199\u538B\u529B\u5927\uFF0C\u672A\u80FD\u5B9E\u73B0\u8BFB\u5199\u5206\u79BB\uFF0C\u5E76\u53D1\u4E5F\u6709\u4E00\u5B9A\u9650\u5236</li></ul><h3 id="_5-2-\u4E00\u4E3B\u4E00\u4ECE" tabindex="-1"><a class="header-anchor" href="#_5-2-\u4E00\u4E3B\u4E00\u4ECE" aria-hidden="true">#</a> 5.2 \u4E00\u4E3B\u4E00\u4ECE</h3><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PoF8jo1Pmpyab6GY4OsOf8bARCwJPIAibtbJHlYnknicibJgZQCsMTKtyTBZLA91jaVawqdjgiaIPVhOOPTXSJ3CDg/640?wx_fmt=png" alt=""></p><ul><li>\u4F18\u70B9\uFF1A\u4ECE\u5E93\u652F\u6301\u8BFB\uFF0C\u5206\u62C5\u4E86\u4E3B\u5E93\u7684\u538B\u529B\uFF0C\u63D0\u5347\u4E86\u5E76\u53D1\u5EA6\u3002\u4E00\u4E2A\u673A\u5668\u6545\u969C\u4E86\u53EF\u4EE5\u81EA\u52A8\u5207\u6362\uFF0C\u64CD\u4F5C\u6BD4\u8F83\u7B80\u5355\u3002</li><li>\u7F3A\u70B9\uFF1A\u4E00\u53F0\u4ECE\u5E93\uFF0C\u5E76\u53D1\u652F\u6301\u8FD8\u662F\u4E0D\u591F\uFF0C\u5E76\u4E14\u4E00\u5171\u4E24\u53F0\u673A\u5668\uFF0C\u8FD8\u662F\u5B58\u5728\u540C\u65F6\u6545\u969C\u7684\u673A\u7387\uFF0C\u4E0D\u591F\u9AD8\u53EF\u7528\u3002</li></ul><h3 id="_5-3-\u4E00\u4E3B\u591A\u4ECE" tabindex="-1"><a class="header-anchor" href="#_5-3-\u4E00\u4E3B\u591A\u4ECE" aria-hidden="true">#</a> 5.3 \u4E00\u4E3B\u591A\u4ECE</h3><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PoF8jo1Pmpyab6GY4OsOf8bARCwJPIAibQ9FgmO7AiaAC4ktliaddy5agyXnicGLNh81LSQV6YT25K8XQ1m5QYpxWw/640?wx_fmt=png" alt=""></p><ul><li>\u4F18\u70B9\uFF1A\u591A\u4E2A\u4ECE\u5E93\u652F\u6301\u8BFB\uFF0C\u5206\u62C5\u4E86\u4E3B\u5E93\u7684\u538B\u529B\uFF0C\u660E\u663E\u63D0\u5347\u4E86\u8BFB\u7684\u5E76\u53D1\u5EA6\u3002</li><li>\u7F3A\u70B9\uFF1A\u53EA\u6709\u4E00\u53F0\u4E3B\u673A\u5199\uFF0C\u56E0\u6B64\u5199\u7684\u5E76\u53D1\u5EA6\u4E0D\u9AD8</li></ul><h3 id="_5-4-mariadb\u540C\u6B65\u591A\u4E3B\u673A\u96C6\u7FA4" tabindex="-1"><a class="header-anchor" href="#_5-4-mariadb\u540C\u6B65\u591A\u4E3B\u673A\u96C6\u7FA4" aria-hidden="true">#</a> 5.4 MariaDB\u540C\u6B65\u591A\u4E3B\u673A\u96C6\u7FA4</h3><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PoF8jo1Pmpyab6GY4OsOf8bARCwJPIAibwzjbh1NOgJlpvVSZYh0iahH3VCU860IiaMODnJzJHNyaVWNkKib3pJLww/640?wx_fmt=png" alt=""></p><ul><li>\u6709\u4EE3\u7406\u5C42\u5B9E\u73B0\u8D1F\u8F7D\u5747\u8861\uFF0C\u591A\u4E2A\u6570\u636E\u5E93\u53EF\u4EE5\u540C\u65F6\u8FDB\u884C\u8BFB\u5199\u64CD\u4F5C\uFF1B\u5404\u4E2A\u6570\u636E\u5E93\u4E4B\u95F4\u53EF\u4EE5\u901A\u8FC7Galera Replication\u65B9\u6CD5\u8FDB\u884C\u6570\u636E\u540C\u6B65\uFF0C\u6BCF\u4E2A\u5E93\u7406\u8BBA\u4E0A\u6570\u636E\u662F\u5B8C\u5168\u4E00\u81F4\u7684\u3002</li><li>\u4F18\u70B9\uFF1A\u8BFB\u5199\u7684\u5E76\u53D1\u5EA6\u90FD\u660E\u663E\u63D0\u5347\uFF0C\u53EF\u4EE5\u4EFB\u610F\u8282\u70B9\u8BFB\u5199\uFF0C\u53EF\u4EE5\u81EA\u52A8\u5254\u9664\u6545\u969C\u8282\u70B9\uFF0C\u5177\u6709\u8F83\u9AD8\u7684\u53EF\u9760\u6027\u3002</li><li>\u7F3A\u70B9\uFF1A\u6570\u636E\u91CF\u4E0D\u652F\u6301\u7279\u522B\u5927\u3002\u8981\u907F\u514D\u5927\u4E8B\u52A1\u5361\u6B7B\uFF0C\u5982\u679C\u96C6\u7FA4\u8282\u70B9\u4E00\u4E2A\u53D8\u6162\uFF0C\u5176\u4ED6\u8282\u70B9\u4E5F\u4F1A\u8DDF\u7740\u53D8\u6162\u3002</li></ul><h3 id="_5-5-\u6570\u636E\u5E93\u4E2D\u95F4\u4EF6" tabindex="-1"><a class="header-anchor" href="#_5-5-\u6570\u636E\u5E93\u4E2D\u95F4\u4EF6" aria-hidden="true">#</a> 5.5 \u6570\u636E\u5E93\u4E2D\u95F4\u4EF6</h3><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PoF8jo1Pmpyab6GY4OsOf8bARCwJPIAibodj44g4RwPE7SYI4bqEZrIy4uX2MsBZZFCLicSGY0icmDH11WQmBoqdg/640?wx_fmt=png" alt=""></p><ul><li>mycat\u5206\u7247\u5B58\u50A8\uFF0C\u6BCF\u4E2A\u5206\u7247\u914D\u7F6E\u4E00\u4E3B\u591A\u4ECE\u7684\u96C6\u7FA4\u3002</li><li>\u4F18\u70B9\uFF1A\u89E3\u51B3\u9AD8\u5E76\u53D1\u9AD8\u6570\u636E\u91CF\u7684\u9AD8\u53EF\u7528\u65B9\u6848</li><li>\u7F3A\u70B9\uFF1A\u7EF4\u62A4\u6210\u672C\u6BD4\u8F83\u5927\u3002</li></ul><h2 id="_6-\u5E38\u89C1\u7684\u7D22\u5F15\u7ED3\u6784\u6709-\u54C8\u5E0C\u8868\u7ED3\u6784\u5C5E\u4E8E\u54EA\u79CD\u573A\u666F" tabindex="-1"><a class="header-anchor" href="#_6-\u5E38\u89C1\u7684\u7D22\u5F15\u7ED3\u6784\u6709-\u54C8\u5E0C\u8868\u7ED3\u6784\u5C5E\u4E8E\u54EA\u79CD\u573A\u666F" aria-hidden="true">#</a> 6. \u5E38\u89C1\u7684\u7D22\u5F15\u7ED3\u6784\u6709\uFF1F\u54C8\u5E0C\u8868\u7ED3\u6784\u5C5E\u4E8E\u54EA\u79CD\u573A\u666F\uFF1F</h2><p>\u54C8\u5E0C\u8868\u3001\u6709\u5E8F\u6570\u7EC4\u548C\u641C\u7D22\u6811\u3002</p><ul><li>\u54C8\u5E0C\u8868\u8FD9\u79CD\u7ED3\u6784\u9002\u7528\u4E8E\u53EA\u6709\u7B49\u503C\u67E5\u8BE2\u7684\u573A\u666F</li><li>\u6709\u5E8F\u6570\u7EC4\u9002\u5408\u8303\u56F4\u67E5\u8BE2\uFF0C\u7528\u4E8C\u5206\u6CD5\u5FEB\u901F\u5F97\u5230\uFF0C\u65F6\u95F4\u590D\u6742\u5EA6\u4E3A O(log(N))\u3002\u67E5\u8BE2\u8FD8\u597D\uFF0C\u5982\u679C\u662F\u63D2\u5165\uFF0C\u5C31\u5F97\u632A\u52A8\u540E\u9762\u6240\u6709\u7684\u8BB0\u5F55\uFF0C\u6210\u672C\u592A\u9AD8\u3002\u56E0\u6B64\u5B83\u4E00\u822C\u53EA\u9002\u7528\u9759\u6001\u5B58\u50A8\u5F15\u64CE\uFF0C\u6BD4\u5982\u4FDD\u5B582018\u5E74\u67D0\u4E2A\u57CE\u5E02\u7684\u6240\u6709\u4EBA\u53E3\u4FE1\u606F\u3002</li><li>B+\u6811\u9002\u5408\u8303\u56F4\u67E5\u8BE2\uFF0C\u6211\u4EEC\u4E00\u822C\u5EFA\u7684\u7D22\u5F15\u7ED3\u6784\u90FD\u662FB+\u6811\u3002</li></ul><h2 id="_7-\u7ED9\u4F60ab-ac-abc\u5B57\u6BB5-\u4F60\u662F\u5982\u4F55\u52A0\u7D22\u5F15\u7684" tabindex="-1"><a class="header-anchor" href="#_7-\u7ED9\u4F60ab-ac-abc\u5B57\u6BB5-\u4F60\u662F\u5982\u4F55\u52A0\u7D22\u5F15\u7684" aria-hidden="true">#</a> 7.\u7ED9\u4F60ab,ac,abc\u5B57\u6BB5\uFF0C\u4F60\u662F\u5982\u4F55\u52A0\u7D22\u5F15\u7684\uFF1F</h2><p>\u8FD9\u4E3B\u8981\u8003\u5BDF\u8054\u5408\u7D22\u5F15\u7684\u6700\u5DE6\u524D\u7F00\u539F\u5219\u77E5\u8BC6\u70B9\u3002</p><ul><li>\u8FD9\u4E2A\u6700\u5DE6\u524D\u7F00\u53EF\u4EE5\u662F\u8054\u5408\u7D22\u5F15\u7684\u6700\u5DE6<code>N</code>\u4E2A\u5B57\u6BB5\u3002\u6BD4\u5982\u7EC4\u5408\u7D22\u5F15<code>\uFF08a,b,c\uFF09</code>\u53EF\u4EE5\u76F8\u5F53\u4E8E\u5EFA\u4E86<code>\uFF08a\uFF09\uFF0C\uFF08a,b\uFF09,(a,b,c)</code>\u4E09\u4E2A\u7D22\u5F15\uFF0C\u5927\u5927\u63D0\u9AD8\u4E86\u7D22\u5F15\u590D\u7528\u80FD\u529B\u3002</li><li>\u6700\u5DE6\u524D\u7F00\u4E5F\u53EF\u4EE5\u662F\u5B57\u7B26\u4E32\u7D22\u5F15\u7684\u6700\u5DE6<code>M</code>\u4E2A\u5B57\u7B26\u3002</li></ul><p>\u56E0\u6B64\u7ED9\u4F60<code>ab,ac,abc</code>\u5B57\u6BB5\uFF0C\u4F60\u53EF\u4EE5\u76F4\u63A5\u52A0<code>abc</code>\u8054\u5408\u7D22\u5F15\u548C<code>ac</code>\u8054\u5408\u7D22\u5F15\u5373\u53EF\u3002</p><h2 id="_8-\u6570\u636E\u5E93\u9694\u79BB\u7EA7\u522B\u662F\u5426\u4E86\u89E3-\u4F60\u4EEC\u7684\u6570\u636E\u5E93\u9ED8\u8BA4\u9694\u79BB\u7EA7\u522B\u662F-\u4E3A\u4EC0\u4E48\u9009\u5B83" tabindex="-1"><a class="header-anchor" href="#_8-\u6570\u636E\u5E93\u9694\u79BB\u7EA7\u522B\u662F\u5426\u4E86\u89E3-\u4F60\u4EEC\u7684\u6570\u636E\u5E93\u9ED8\u8BA4\u9694\u79BB\u7EA7\u522B\u662F-\u4E3A\u4EC0\u4E48\u9009\u5B83" aria-hidden="true">#</a> 8. \u6570\u636E\u5E93\u9694\u79BB\u7EA7\u522B\u662F\u5426\u4E86\u89E3\uFF1F\u4F60\u4EEC\u7684\u6570\u636E\u5E93\u9ED8\u8BA4\u9694\u79BB\u7EA7\u522B\u662F\uFF1F\u4E3A\u4EC0\u4E48\u9009\u5B83\uFF1F</h2><p>\u56DB\u5927\u6570\u636E\u5E93\u9694\u79BB\u7EA7\u522B\uFF0C\u5206\u522B\u662F<code>\u8BFB\u672A\u63D0\u4EA4\uFF0C\u8BFB\u5DF2\u63D0\u4EA4\uFF0C\u53EF\u91CD\u590D\u8BFB\uFF0C\u4E32\u884C\u5316\uFF08Serializable\uFF09</code>\u3002</p><ul><li><strong>\u8BFB\u672A\u63D0\u4EA4</strong>\uFF1A\u4E8B\u52A1\u5373\u4F7F\u672A\u63D0\u4EA4\uFF0C\u5374\u53EF\u4EE5\u88AB\u522B\u7684\u4E8B\u52A1\u8BFB\u53D6\u5230\u7684\uFF0C\u8FD9\u7EA7\u522B\u7684\u4E8B\u52A1\u9694\u79BB\u6709\u810F\u8BFB\u3001\u91CD\u590D\u8BFB\u3001\u5E7B\u8BFB\u7684\u95EE\u9898\u3002</li><li><strong>\u8BFB\u5DF2\u63D0\u4EA4</strong>\uFF1A\u5F53\u524D\u4E8B\u52A1\u53EA\u80FD\u8BFB\u53D6\u5230\u5176\u4ED6\u4E8B\u52A1\u63D0\u4EA4\u7684\u6570\u636E\uFF0C\u8FD9\u79CD\u4E8B\u52A1\u7684\u9694\u79BB\u7EA7\u522B\u89E3\u51B3\u4E86\u810F\u8BFB\u95EE\u9898\uFF0C\u4F46\u8FD8\u662F\u4F1A\u5B58\u5728\u4E0D\u53EF\u91CD\u590D\u8BFB\u3001\u5E7B\u8BFB\u95EE\u9898\uFF1B</li><li><strong>\u53EF\u91CD\u590D\u8BFB</strong>\uFF1A\u9650\u5236\u4E86\u8BFB\u53D6\u6570\u636E\u7684\u65F6\u5019\uFF0C\u4E0D\u53EF\u4EE5\u8FDB\u884C\u4FEE\u6539\uFF0C\u6240\u4EE5\u89E3\u51B3\u4E86<strong>\u4E0D\u53EF\u91CD\u590D\u8BFB</strong>\u7684\u95EE\u9898\uFF0C\u4F46\u662F\u8BFB\u53D6\u8303\u56F4\u6570\u636E\u7684\u65F6\u5019\uFF0C\u662F\u53EF\u4EE5\u63D2\u5165\u6570\u636E\uFF0C\u6240\u4EE5\u8FD8\u4F1A\u5B58\u5728\u5E7B\u8BFB\u95EE\u9898\u3002</li><li><strong>\u4E32\u884C\u5316</strong>\uFF1A\u4E8B\u52A1\u6700\u9AD8\u7684\u9694\u79BB\u7EA7\u522B\uFF0C\u5728\u8BE5\u7EA7\u522B\u4E0B\uFF0C\u6240\u6709\u4E8B\u52A1\u90FD\u662F\u8FDB\u884C\u4E32\u884C\u5316\u987A\u5E8F\u6267\u884C\u7684\u3002\u53EF\u4EE5\u907F\u514D\u810F\u8BFB\u3001\u4E0D\u53EF\u91CD\u590D\u8BFB\u4E0E\u5E7B\u8BFB\u6240\u6709\u5E76\u53D1\u95EE\u9898\u3002\u4F46\u662F\u8FD9\u79CD\u4E8B\u52A1\u9694\u79BB\u7EA7\u522B\u4E0B\uFF0C\u4E8B\u52A1\u6267\u884C\u5F88\u8017\u6027\u80FD\u3002</li></ul><p>MySQL\u9009\u62E9<code>Repeatable Read\uFF08\u53EF\u91CD\u590D\u8BFB\uFF09</code>\u4F5C\u4E3A\u9ED8\u8BA4\u9694\u79BB\u7EA7\u522B\uFF0C\u6211\u4EEC\u7684\u6570\u636E\u5E93\u9694\u79BB\u7EA7\u522B\u9009\u7684\u662F<code>\u8BFB\u5DF2\u63D0\u4EA4</code>\u3002</p><h3 id="_8-1-\u4E3A\u4EC0\u4E48mysql\u7684\u9ED8\u8BA4\u9694\u79BB\u79BB\u522B\u662Frr" tabindex="-1"><a class="header-anchor" href="#_8-1-\u4E3A\u4EC0\u4E48mysql\u7684\u9ED8\u8BA4\u9694\u79BB\u79BB\u522B\u662Frr" aria-hidden="true">#</a> 8.1 \u4E3A\u4EC0\u4E48MySQL\u7684\u9ED8\u8BA4\u9694\u79BB\u79BB\u522B\u662FRR?</h3><p>binlog\u7684\u683C\u5F0F\u4E5F\u6709\u4E09\u79CD\uFF1Astatement\uFF0Crow\uFF0Cmixed\u3002\u8BBE\u7F6E\u4E3A<code>statement</code>\u683C\u5F0F\uFF0Cbinlog\u8BB0\u5F55\u7684\u662FSQL\u7684\u539F\u6587\u3002\u53C8\u56E0\u4E3AMySQL\u5728\u4E3B\u4ECE\u590D\u5236\u7684\u8FC7\u7A0B\u662F\u901A\u8FC7<code>binlog</code>\u8FDB\u884C\u6570\u636E\u540C\u6B65\uFF0C\u5982\u679C\u8BBE\u7F6E\u4E3A\u8BFB\u5DF2\u63D0\u4EA4\uFF08RC\uFF09\u9694\u79BB\u7EA7\u522B\uFF0C\u5F53\u51FA\u73B0\u4E8B\u52A1\u4E71\u5E8F\u7684\u65F6\u5019\uFF0C\u5C31\u4F1A\u5BFC\u81F4\u5907\u5E93\u5728 SQL \u56DE\u653E\u4E4B\u540E\uFF0C\u7ED3\u679C\u548C\u4E3B\u5E93\u5185\u5BB9\u4E0D\u4E00\u81F4\u3002</p><p>\u6BD4\u5982\u4E00\u4E2A\u8868t\uFF0C\u8868\u4E2D\u6709\u4E24\u6761\u8BB0\u5F55\uFF1A</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>  
+
+CREATE TABLE t (    
+
+     a int(11) DEFAULT NULL,    
+
+     b int(11) DEFAULT NULL,    
+
+     PRIMARY KEY a (a),  
+
+     KEY b(b)  
+
+   ) ENGINE=InnoDB DEFAULT CHARSET=latin1;    
+
+   insert into t1 values(10,666),(20,233);   
+
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>\u4E24\u4E2A\u4E8B\u52A1\u5E76\u53D1\u5199\u64CD\u4F5C\uFF0C\u5982\u4E0B\uFF1A</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PoF8jo1Pmpyab6GY4OsOf8bARCwJPIAibMSvVJf2hnOWETT26buWgm1Llib2MGUon1bbqnloLhicclJibT4daY84QQ/640?wx_fmt=png" alt=""></p><p>\u5728<code>\u8BFB\u5DF2\u63D0\u4EA4\uFF08RC\uFF09</code>\u9694\u79BB\u7EA7\u522B\u4E0B\uFF0C\u4E24\u4E2A\u4E8B\u52A1\u6267\u884C\u5B8C\u540E\uFF0C\u6570\u636E\u5E93\u7684\u4E24\u6761\u8BB0\u5F55\u5C31\u53D8\u6210\u4E86<code>\uFF0830,666\uFF09\u3001(20,666)</code>\u3002\u8FD9\u4E24\u4E2A\u4E8B\u52A1\u6267\u884C\u5B8C\u540E\uFF0Cbinlog\u4E5F\u5C31\u6709\u4E24\u6761\u8BB0\u5F55\uFF0C\u56E0\u4E3A\u4E8B\u52A1binlog\u7528\u7684\u662F<code>statement</code>\u683C\u5F0F\uFF0C\u4E8B\u52A12\u5148\u63D0\u4EA4\uFF0C\u56E0\u6B64<code>update t set b=666 where b=233</code>\u4F18\u5148\u8BB0\u5F55\uFF0C\u800C<code>update t set a=30 where b=666</code>\u8BB0\u5F55\u5728\u540E\u9762\u3002</p><p>\u5F53<code>bin log</code>\u540C\u6B65\u5230\u4ECE\u5E93\u540E\uFF0C\u6267\u884C<code>update t set b=666 where b=233</code>\u548C<code>update t set a=30 where b=666</code>\u8BB0\u5F55\uFF0C\u6570\u636E\u5E93\u7684\u8BB0\u5F55\u5C31\u53D8\u6210<code>\uFF0830,666\uFF09\u3001(30,666)</code>\uFF0C\u8FD9\u65F6\u5019\u4E3B\u4ECE\u6570\u636E\u4E0D\u4E00\u81F4\u5566\u3002</p><p>\u56E0\u6B64MySQL\u7684<strong>\u9ED8\u8BA4\u9694\u79BB\u79BB\u522B</strong>\u9009\u62E9\u4E86<code>RR</code>\u800C\u4E0D\u662F<code>RC</code>\u3002<code>RR</code>\u9694\u79BB\u7EA7\u522B\u4E0B\uFF0C\u66F4\u65B0\u6570\u636E\u7684\u65F6\u5019\u4E0D\u4EC5\u5BF9\u66F4\u65B0\u7684\u884C\u52A0\u884C\u7EA7\u9501\uFF0C\u8FD8\u4F1A\u52A0\u95F4\u9699\u9501<code>\uFF08gap lock\uFF09</code>\u3002\u4E8B\u52A12\u8981\u6267\u884C\u65F6\uFF0C\u56E0\u4E3A\u4E8B\u52A11\u589E\u52A0\u4E86\u95F4\u9699\u9501\uFF0C\u5C31\u4F1A\u5BFC\u81F4\u4E8B\u52A12\u6267\u884C\u88AB\u5361\u4F4F\uFF0C\u53EA\u6709\u7B49\u4E8B\u52A11\u63D0\u4EA4\u6216\u8005\u56DE\u6EDA\u540E\u624D\u80FD\u7EE7\u7EED\u6267\u884C\u3002</p><p>\u5E76\u4E14\uFF0CMySQL\u8FD8\u7981\u6B62\u5728\u4F7F\u7528<code>statement</code>\u683C\u5F0F\u7684<code>binlog</code>\u7684\u60C5\u51B5\u4E0B\uFF0C\u4F7F\u7528<code>READ COMMITTED</code>\u4F5C\u4E3A\u4E8B\u52A1\u9694\u79BB\u7EA7\u522B\u3002</p><h3 id="\u6211\u4EEC\u7684\u6570\u636E\u5E93\u9694\u79BB\u7EA7\u522B\u6700\u540E\u9009\u7684\u662F\u8BFB\u5DF2\u63D0\u4EA4-rc-\u3002" tabindex="-1"><a class="header-anchor" href="#\u6211\u4EEC\u7684\u6570\u636E\u5E93\u9694\u79BB\u7EA7\u522B\u6700\u540E\u9009\u7684\u662F\u8BFB\u5DF2\u63D0\u4EA4-rc-\u3002" aria-hidden="true">#</a> \u6211\u4EEC\u7684\u6570\u636E\u5E93\u9694\u79BB\u7EA7\u522B\u6700\u540E\u9009\u7684\u662F\u8BFB\u5DF2\u63D0\u4EA4\uFF08RC\uFF09\u3002</h3><p>\u90A3\u4E3A\u4EC0\u4E48MySQL\u5B98\u65B9\u9ED8\u8BA4\u9694\u79BB\u7EA7\u522B\u662FRR\uFF0C\u800C\u6709\u4E9B\u5927\u5382\u9009\u62E9\u4E86RC\u4F5C\u4E3A\u9ED8\u8BA4\u7684\u9694\u79BB\u7EA7\u522B\u5462\uFF1F</p><ul><li>\u63D0\u5347\u5E76\u53D1</li></ul><p>RC \u5728\u52A0\u9501\u7684\u8FC7\u7A0B\u4E2D\uFF0C\u4E0D\u9700\u8981\u6DFB\u52A0<code>Gap Lock</code>\u548C <code>Next-Key Lock</code> \u7684\uFF0C\u53EA\u5BF9\u8981\u4FEE\u6539\u7684\u8BB0\u5F55\u6DFB\u52A0\u884C\u7EA7\u9501\u5C31\u884C\u4E86\u3002\u56E0\u6B64RC\u7684\u652F\u6301\u7684\u5E76\u53D1\u5EA6\u6BD4RR\u9AD8\u5F97\u591A\uFF0C</p><ul><li>\u51CF\u5C11\u6B7B\u9501</li></ul><p>\u6B63\u662F\u56E0\u4E3ARR\u9694\u79BB\u7EA7\u522B\u589E\u52A0\u4E86<code>Gap Lock</code>\u548C <code>Next-Key Lock</code> \u9501\uFF0C\u56E0\u6B64\u5B83\u76F8\u5BF9\u4E8ERC\uFF0C\u66F4\u5BB9\u6613\u4EA7\u751F\u6B7B\u9501\u3002</p><h2 id="_9-rr\u9694\u79BB\u7EA7\u522B\u5B9E\u73B0\u539F\u7406-\u5B83\u662F\u5982\u4F55\u89E3\u51B3\u4E0D\u53EF\u91CD\u590D\u8BFB\u7684" tabindex="-1"><a class="header-anchor" href="#_9-rr\u9694\u79BB\u7EA7\u522B\u5B9E\u73B0\u539F\u7406-\u5B83\u662F\u5982\u4F55\u89E3\u51B3\u4E0D\u53EF\u91CD\u590D\u8BFB\u7684" aria-hidden="true">#</a> 9. RR\u9694\u79BB\u7EA7\u522B\u5B9E\u73B0\u539F\u7406\uFF0C\u5B83\u662F\u5982\u4F55\u89E3\u51B3\u4E0D\u53EF\u91CD\u590D\u8BFB\u7684\uFF1F</h2><h3 id="_9-1-\u4EC0\u4E48\u662F\u4E0D\u53EF\u91CD\u590D\u8BFB" tabindex="-1"><a class="header-anchor" href="#_9-1-\u4EC0\u4E48\u662F\u4E0D\u53EF\u91CD\u590D\u8BFB" aria-hidden="true">#</a> 9.1 \u4EC0\u4E48\u662F\u4E0D\u53EF\u91CD\u590D\u8BFB</h3><p>\u5148\u56DE\u5FC6\u4E0B\u4EC0\u4E48\u662F<strong>\u4E0D\u53EF\u91CD\u590D\u8BFB</strong>\u3002\u5047\u8BBE\u73B0\u5728\u6709\u4E24\u4E2A\u4E8B\u52A1A\u548CB\uFF1A</p><ul><li>\u4E8B\u52A1A\u5148\u67E5\u8BE2Jay\u7684\u4F59\u989D\uFF0C\u67E5\u5230\u7ED3\u679C\u662F100</li><li>\u8FD9\u65F6\u5019\u4E8B\u52A1B \u5BF9Jay\u7684\u8D26\u6237\u4F59\u989D\u8FDB\u884C\u6263\u51CF\uFF0C\u6263\u53BB10\u540E\uFF0C\u63D0\u4EA4\u4E8B\u52A1</li><li>\u4E8B\u52A1A\u518D\u53BB\u67E5\u8BE2Jay\u7684\u8D26\u6237\u4F59\u989D\u53D1\u73B0\u53D8\u6210\u4E8690</li></ul><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PoF8jo1Pmpyab6GY4OsOf8bARCwJPIAiba3OUDd1QonTWQ4CmyOzEaGVWAtzdgicwY8yUPwtFjjePRbn7J7UspsQ/640?wx_fmt=png" alt=""></p><p>\u4E8B\u52A1A\u88AB\u4E8B\u52A1B\u5E72\u6270\u5230\u4E86\uFF01\u5728\u4E8B\u52A1A\u8303\u56F4\u5185\uFF0C\u4E24\u4E2A\u76F8\u540C\u7684\u67E5\u8BE2\uFF0C<strong>\u8BFB\u53D6\u540C\u4E00\u6761\u8BB0\u5F55\uFF0C\u5374\u8FD4\u56DE\u4E86\u4E0D\u540C\u7684\u6570\u636E\uFF0C\u8FD9\u5C31\u662F\u4E0D\u53EF\u91CD\u590D\u8BFB</strong>\u3002</p><h3 id="_9-2-undo-log\u7248\u672C\u94FE-read-view\u53EF\u89C1\u6027\u89C4\u5219" tabindex="-1"><a class="header-anchor" href="#_9-2-undo-log\u7248\u672C\u94FE-read-view\u53EF\u89C1\u6027\u89C4\u5219" aria-hidden="true">#</a> 9.2 undo log\u7248\u672C\u94FE + Read View\u53EF\u89C1\u6027\u89C4\u5219</h3><p>RR\u9694\u79BB\u7EA7\u522B\u5B9E\u73B0\u539F\u7406\uFF0C\u5C31\u662FMVCC\u591A\u7248\u672C\u5E76\u53D1\u63A7\u5236\uFF0C\u800CMVCC\u662F\u662F\u901A\u8FC7<code>Read View+ Undo Log</code>\u5B9E\u73B0\u7684\uFF0CUndo Log \u4FDD\u5B58\u4E86\u5386\u53F2\u5FEB\u7167\uFF0CRead View\u53EF\u89C1\u6027\u89C4\u5219\u5E2E\u52A9\u5224\u65AD\u5F53\u524D\u7248\u672C\u7684\u6570\u636E\u662F\u5426\u53EF\u89C1\u3002</p><p><code>Undo Log</code>\u7248\u672C\u94FE\u957F\u8FD9\u6837\uFF1A</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PoF8jo1Pmpyab6GY4OsOf8bARCwJPIAibeVAZhoVfuV2AAdIFnzda5mBmllMGTtV25nNPUBU0SkBZOYdibjibpvwQ/640?wx_fmt=png" alt=""></p><p>Read view \u7684\u51E0\u4E2A\u91CD\u8981\u5C5E\u6027</p><ul><li><code>m_ids</code>:\u5F53\u524D\u7CFB\u7EDF\u4E2D\u90A3\u4E9B\u6D3B\u8DC3(\u672A\u63D0\u4EA4)\u7684\u8BFB\u5199\u4E8B\u52A1ID, \u5B83\u6570\u636E\u7ED3\u6784\u4E3A\u4E00\u4E2AList\u3002</li><li><code>min_limit_id</code>:\u8868\u793A\u5728\u751F\u6210Read View\u65F6\uFF0C\u5F53\u524D\u7CFB\u7EDF\u4E2D\u6D3B\u8DC3\u7684\u8BFB\u5199\u4E8B\u52A1\u4E2D\u6700\u5C0F\u7684\u4E8B\u52A1id\uFF0C\u5373m_ids\u4E2D\u7684\u6700\u5C0F\u503C\u3002</li><li><code>max_limit_id</code>:\u8868\u793A\u751F\u6210Read View\u65F6\uFF0C\u7CFB\u7EDF\u4E2D\u5E94\u8BE5\u5206\u914D\u7ED9\u4E0B\u4E00\u4E2A\u4E8B\u52A1\u7684id\u503C\u3002</li><li><code>creator_trx_id</code>: \u521B\u5EFA\u5F53\u524DRead View\u7684\u4E8B\u52A1ID</li></ul><p>Read view \u53EF\u89C1\u6027\u89C4\u5219\u5982\u4E0B\uFF1A</p><ol><li>\u5982\u679C\u6570\u636E\u4E8B\u52A1ID<code>trx_id &lt; min_limit_id</code>\uFF0C\u8868\u660E\u751F\u6210\u8BE5\u7248\u672C\u7684\u4E8B\u52A1\u5728\u751F\u6210Read View\u524D\uFF0C\u5DF2\u7ECF\u63D0\u4EA4(\u56E0\u4E3A\u4E8B\u52A1ID\u662F\u9012\u589E\u7684)\uFF0C\u6240\u4EE5\u8BE5\u7248\u672C\u53EF\u4EE5\u88AB\u5F53\u524D\u4E8B\u52A1\u8BBF\u95EE\u3002</li><li>\u5982\u679C<code>trx_id&gt;= max_limit_id</code>\uFF0C\u8868\u660E\u751F\u6210\u8BE5\u7248\u672C\u7684\u4E8B\u52A1\u5728\u751F\u6210Read View\u540E\u624D\u751F\u6210\uFF0C\u6240\u4EE5\u8BE5\u7248\u672C\u4E0D\u53EF\u4EE5\u88AB\u5F53\u524D\u4E8B\u52A1\u8BBF\u95EE\u3002</li><li>\u5982\u679C<code>min_limit_id =&lt;trx_id&lt; max_limit_id</code>,\u9700\u8981\u52063\u79CD\u60C5\u51B5\u8BA8\u8BBA</li></ol><blockquote><ul><li>3.1 \u5982\u679C<code>m_ids</code>\u5305\u542B<code>trx_id</code>,\u5219\u4EE3\u8868Read View\u751F\u6210\u65F6\u523B\uFF0C\u8FD9\u4E2A\u4E8B\u52A1\u8FD8\u672A\u63D0\u4EA4\uFF0C\u4F46\u662F\u5982\u679C\u6570\u636E\u7684<code>trx_id</code>\u7B49\u4E8E<code>creator_trx_id</code>\u7684\u8BDD\uFF0C\u8868\u660E\u6570\u636E\u662F\u81EA\u5DF1\u751F\u6210\u7684\uFF0C\u56E0\u6B64\u662F\u53EF\u89C1\u7684\u3002</li><li>3.2 \u5982\u679C<code>m_ids</code>\u5305\u542B<code>trx_id</code>\uFF0C\u5E76\u4E14<code>trx_id</code>\u4E0D\u7B49\u4E8E<code>creator_trx_id</code>\uFF0C\u5219Read View\u751F\u6210\u65F6\uFF0C\u4E8B\u52A1\u672A\u63D0\u4EA4\uFF0C\u5E76\u4E14\u4E0D\u662F\u81EA\u5DF1\u751F\u4EA7\u7684\uFF0C\u6240\u4EE5\u5F53\u524D\u4E8B\u52A1\u4E5F\u662F\u770B\u4E0D\u89C1\u7684\uFF1B</li><li>3.3 \u5982\u679C<code>m_ids</code>\u4E0D\u5305\u542B<code>trx_id</code>\uFF0C\u5219\u8BF4\u660E\u4F60\u8FD9\u4E2A\u4E8B\u52A1\u5728Read View\u751F\u6210\u4E4B\u524D\u5C31\u5DF2\u7ECF\u63D0\u4EA4\u4E86\uFF0C\u4FEE\u6539\u7684\u7ED3\u679C\uFF0C\u5F53\u524D\u4E8B\u52A1\u662F\u80FD\u770B\u89C1\u7684\u3002</li></ul></blockquote><h3 id="_9-3-rr-\u5982\u4F55\u89E3\u51B3\u4E0D\u53EF\u91CD\u590D\u8BFB" tabindex="-1"><a class="header-anchor" href="#_9-3-rr-\u5982\u4F55\u89E3\u51B3\u4E0D\u53EF\u91CD\u590D\u8BFB" aria-hidden="true">#</a> 9.3 RR \u5982\u4F55\u89E3\u51B3\u4E0D\u53EF\u91CD\u590D\u8BFB</h3><p>\u67E5\u8BE2\u4E00\u6761\u8BB0\u5F55\uFF0C\u57FA\u4E8EMVCC\uFF0C\u662F\u600E\u6837\u7684\u6D41\u7A0B</p><ol><li>\u83B7\u53D6\u4E8B\u52A1\u81EA\u5DF1\u7684\u7248\u672C\u53F7\uFF0C\u5373\u4E8B\u52A1ID</li><li>\u83B7\u53D6Read View</li><li>\u67E5\u8BE2\u5F97\u5230\u7684\u6570\u636E\uFF0C\u7136\u540ERead View\u4E2D\u7684\u4E8B\u52A1\u7248\u672C\u53F7\u8FDB\u884C\u6BD4\u8F83\u3002</li><li>\u5982\u679C\u4E0D\u7B26\u5408Read View\u7684\u53EF\u89C1\u6027\u89C4\u5219\uFF0C \u5373\u5C31\u9700\u8981Undo log\u4E2D\u5386\u53F2\u5FEB\u7167;</li><li>\u6700\u540E\u8FD4\u56DE\u7B26\u5408\u89C4\u5219\u7684\u6570\u636E</li></ol><p>\u5047\u8BBE\u5B58\u5728\u4E8B\u52A1A\u548CB\uFF0CSQL\u6267\u884C\u6D41\u7A0B\u5982\u4E0B</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PoF8jo1Pmpyab6GY4OsOf8bARCwJPIAibu16icBALg9RgePHoREiaicIMKfhicdTYDpicKgc698tUQrZj9QaFicqgJU9A/640?wx_fmt=png" alt=""></p><p>\u5728\u53EF\u91CD\u590D\u8BFB\uFF08RR\uFF09\u9694\u79BB\u7EA7\u522B\u4E0B\uFF0C<strong>\u4E00\u4E2A\u4E8B\u52A1\u91CC\u53EA\u4F1A\u83B7\u53D6\u4E00\u6B21Read View</strong>\uFF0C\u90FD\u662F\u526F\u672C\u5171\u7528\u7684\uFF0C\u4ECE\u800C\u4FDD\u8BC1\u6BCF\u6B21\u67E5\u8BE2\u7684\u6570\u636E\u90FD\u662F\u4E00\u6837\u7684\u3002</p><p>\u5047\u8BBE\u5F53\u524D\u6709\u4E00\u5F20core_user\u8868\uFF0C\u63D2\u5165\u4E00\u6761\u521D\u59CB\u5316\u6570\u636E,\u5982\u4E0B\uFF1A</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PoF8jo1Pmpyab6GY4OsOf8bARCwJPIAib5BuIpklWZXauSovTx5Da38rpmWiauAQ7zkY12DnAuvgW5JnOIvYVGqw/640?wx_fmt=png" alt="">\u57FA\u4E8EMVCC\uFF0C\u6211\u4EEC\u6765\u770B\u770B\u6267\u884C\u6D41\u7A0B</p><ol><li>A\u5F00\u542F\u4E8B\u52A1\uFF0C\u9996\u5148\u5F97\u5230\u4E00\u4E2A\u4E8B\u52A1ID\u4E3A100</li><li>B\u5F00\u542F\u4E8B\u52A1\uFF0C\u5F97\u5230\u4E8B\u52A1ID\u4E3A101</li><li>\u4E8B\u52A1A\u751F\u6210\u4E00\u4E2ARead View\uFF0Cread view\u5BF9\u5E94\u7684\u503C\u5982\u4E0B</li></ol><table><thead><tr><th>\u53D8\u91CF</th><th>\u503C</th></tr></thead><tbody><tr><td>m_ids</td><td>100\uFF0C101</td></tr><tr><td>max_limit_id</td><td>102</td></tr><tr><td>min_limit_id</td><td>100</td></tr><tr><td>creator_trx_id</td><td>100</td></tr></tbody></table><p>\u7136\u540E\u56DE\u5230\u7248\u672C\u94FE\uFF1A\u5F00\u59CB\u4ECE\u7248\u672C\u94FE\u4E2D\u6311\u9009\u53EF\u89C1\u7684\u8BB0\u5F55\uFF1A</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PoF8jo1Pmpyab6GY4OsOf8bARCwJPIAiblmQLBfGiaGHzqQEYCPhgTtYPSfoWXDkFcp9MqYPUuO2sEkuyS9mPNqA/640?wx_fmt=png" alt=""></p><p>\u7531\u56FE\u53EF\u4EE5\u770B\u51FA\uFF0C\u6700\u65B0\u7248\u672C\u7684\u5217name\u7684\u5185\u5BB9\u662F\u5B59\u6743\uFF0C\u8BE5\u7248\u672C\u7684trx_id\u503C\u4E3A100\u3002\u5F00\u59CB\u6267\u884C<strong>read view\u53EF\u89C1\u6027\u89C4\u5219</strong>\u6821\u9A8C\uFF1A</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>min_limit_id(100)=&lt;trx_id\uFF08100\uFF09&lt;102;  
+
+creator_trx_id = trx_id =100;  
+
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>\u7531\u6B64\u53EF\u5F97\uFF0Ctrx_id=100\u7684\u8FD9\u4E2A\u8BB0\u5F55\uFF0C\u5F53\u524D\u4E8B\u52A1\u662F\u53EF\u89C1\u7684\u3002\u6240\u4EE5\u67E5\u5230\u662F<strong>name\u4E3A\u5B59\u6743</strong>\u7684\u8BB0\u5F55\u3002</p><ol start="4"><li>\u4E8B\u52A1B\u8FDB\u884C\u4FEE\u6539\u64CD\u4F5C\uFF0C\u628A\u540D\u5B57\u6539\u4E3A\u66F9\u64CD\u3002\u628A\u539F\u6570\u636E\u62F7\u8D1D\u5230undo log,\u7136\u540E\u5BF9\u6570\u636E\u8FDB\u884C\u4FEE\u6539\uFF0C\u6807\u8BB0\u4E8B\u52A1ID\u548C\u4E0A\u4E00\u4E2A\u6570\u636E\u7248\u672C\u5728undo log\u7684\u5730\u5740\u3002</li></ol><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PoF8jo1Pmpyab6GY4OsOf8bARCwJPIAiblILtb4QNnneTsITr691ePXzahWjYUxjAgcjiaWXic7v7weZ7cQTibIpEQ/640?wx_fmt=png" alt=""></p><ol start="5"><li>\u4E8B\u52A1B\u63D0\u4EA4\u4E8B\u52A1</li><li>\u4E8B\u52A1A\u518D\u6B21\u6267\u884C\u67E5\u8BE2\u64CD\u4F5C\uFF0C\u56E0\u4E3A\u662FRR\uFF08\u53EF\u91CD\u590D\u8BFB\uFF09\u9694\u79BB\u7EA7\u522B\uFF0C\u56E0\u6B64<strong>\u4F1A\u590D\u7528\u8001\u7684Read View\u526F\u672C</strong>\uFF0CRead View\u5BF9\u5E94\u7684\u503C\u5982\u4E0B</li></ol><table><thead><tr><th>\u53D8\u91CF</th><th>\u503C</th></tr></thead><tbody><tr><td>m_ids</td><td>100\uFF0C101</td></tr><tr><td>max_limit_id</td><td>102</td></tr><tr><td>min_limit_id</td><td>100</td></tr><tr><td>creator_trx_id</td><td>100</td></tr></tbody></table><p>\u7136\u540E\u518D\u6B21\u56DE\u5230\u7248\u672C\u94FE\uFF1A\u4ECE\u7248\u672C\u94FE\u4E2D\u6311\u9009\u53EF\u89C1\u7684\u8BB0\u5F55\uFF1A</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PoF8jo1Pmpyab6GY4OsOf8bARCwJPIAiblILtb4QNnneTsITr691ePXzahWjYUxjAgcjiaWXic7v7weZ7cQTibIpEQ/640?wx_fmt=png" alt=""></p><p>\u4ECE\u56FE\u53EF\u5F97\uFF0C\u6700\u65B0\u7248\u672C\u7684\u5217name\u7684\u5185\u5BB9\u662F\u66F9\u64CD\uFF0C\u8BE5\u7248\u672C\u7684trx_id\u503C\u4E3A101\u3002\u5F00\u59CB\u6267\u884Cread view\u53EF\u89C1\u6027\u89C4\u5219\u6821\u9A8C\uFF1A</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>min_limit_id(100)=&lt;trx_id\uFF08101\uFF09&lt;max_limit_id\uFF08102);  
+
+\u56E0\u4E3Am_ids{100,101}\u5305\u542Btrx_id\uFF08101\uFF09\uFF0C  
+
+\u5E76\u4E14creator_trx_id (100) \u4E0D\u7B49\u4E8Etrx_id\uFF08101\uFF09  
+
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>\u6240\u4EE5\uFF0C<code>trx_id=101</code>\u8FD9\u4E2A\u8BB0\u5F55\uFF0C\u5BF9\u4E8E\u5F53\u524D\u4E8B\u52A1\u662F\u4E0D\u53EF\u89C1\u7684\u3002\u8FD9\u65F6\u5019\u5462\uFF0C\u7248\u672C\u94FE<code>roll_pointer</code>\u8DF3\u5230\u4E0B\u4E00\u4E2A\u7248\u672C\uFF0C<code>trx_id=100</code>\u8FD9\u4E2A\u8BB0\u5F55\uFF0C\u518D\u6B21\u6821\u9A8C\u662F\u5426\u53EF\u89C1\uFF1A</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>min_limit_id(100)=&lt;trx_id\uFF08100\uFF09&lt; max_limit_id\uFF08102);  
+
+\u56E0\u4E3Am_ids{100,101}\u5305\u542Btrx_id\uFF08100\uFF09\uFF0C  
+
+\u5E76\u4E14creator_trx_id (100) \u7B49\u4E8Etrx_id\uFF08100\uFF09  
+
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>\u6240\u4EE5\uFF0Ctrx_id=100\u8FD9\u4E2A\u8BB0\u5F55\uFF0C\u5BF9\u4E8E\u5F53\u524D\u4E8B\u52A1\u662F\u53EF\u89C1\u7684\uFF0C\u6240\u4EE5\u4E24\u6B21\u67E5\u8BE2\u7ED3\u679C\uFF0C\u90FD\u662Fname=\u5B59\u6743\u7684\u90A3\u4E2A\u8BB0\u5F55\u3002\u5373\u5728\u53EF\u91CD\u590D\u8BFB\uFF08RR\uFF09\u9694\u79BB\u7EA7\u522B\u4E0B\uFF0C\u590D\u7528\u8001\u7684Read View\u526F\u672C\uFF0C\u89E3\u51B3\u4E86\u4E0D\u53EF\u91CD\u590D\u8BFB\u7684\u95EE\u9898\u3002</p><h2 id="_10-\u4F60\u4EEC\u9879\u76EE\u4F7F\u7528\u4E86rocketmq\u5BF9\u5427-\u90A3\u4F60\u77E5\u9053\u5982\u4F55\u4FDD\u8BC1\u6D88\u606F\u4E0D\u4E22\u5931\u5417" tabindex="-1"><a class="header-anchor" href="#_10-\u4F60\u4EEC\u9879\u76EE\u4F7F\u7528\u4E86rocketmq\u5BF9\u5427-\u90A3\u4F60\u77E5\u9053\u5982\u4F55\u4FDD\u8BC1\u6D88\u606F\u4E0D\u4E22\u5931\u5417" aria-hidden="true">#</a> 10. \u4F60\u4EEC\u9879\u76EE\u4F7F\u7528\u4E86RocketMQ\u5BF9\u5427\uFF1F\u90A3\u4F60\u77E5\u9053\u5982\u4F55\u4FDD\u8BC1\u6D88\u606F\u4E0D\u4E22\u5931\u5417\uFF1F</h2><p>\u4E00\u4E2A\u6D88\u606F\u4ECE\u751F\u4EA7\u8005\u4EA7\u751F\uFF0C\u5230\u88AB\u6D88\u8D39\u8005\u6D88\u8D39\uFF0C\u4E3B\u8981\u7ECF\u8FC7\u8FD93\u4E2A\u8FC7\u7A0B\uFF1A</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PoF8jo1Pmpyab6GY4OsOf8bARCwJPIAibSFUmX9dROjhlhKSkbCL8BMMIRXaXmAv17N4AJLMhsfickoic4icJMFUBw/640?wx_fmt=png" alt=""></p><ol><li>\u751F\u4EA7\u8005\u4EA7\u751F\u6D88\u606F</li><li>\u6D88\u606F\u53D1\u9001\u5230\u5B58\u50A8\u7AEF\uFF0C\u4FDD\u5B58\u4E0B\u6765</li><li>\u6D88\u606F\u63A8\u9001\u5230\u6D88\u8D39\u8005\uFF0C\u6D88\u8D39\u8005\u6D88\u8D39\u5B8C\uFF0Cack\u5E94\u7B54\u3002</li></ol><p>\u56E0\u6B64\u5982\u4F55\u4FDD\u8BC1MQ\u4E0D\u4E22\u5931\u6D88\u606F\uFF0C\u53EF\u4EE5\u4ECE\u8FD9\u4E09\u4E2A\u9636\u6BB5\u9610\u8FF0\uFF1A</p><ul><li>\u751F\u4EA7\u8005\u4FDD\u8BC1\u4E0D\u4E22\u6D88\u606F</li><li>\u5B58\u50A8\u7AEF\u4E0D\u4E22\u6D88\u606F</li><li>\u6D88\u8D39\u8005\u4E0D\u4E22\u6D88\u606F</li></ul><h3 id="_10-1-\u751F\u4EA7\u8005\u4FDD\u8BC1\u4E0D\u4E22\u6D88\u606F" tabindex="-1"><a class="header-anchor" href="#_10-1-\u751F\u4EA7\u8005\u4FDD\u8BC1\u4E0D\u4E22\u6D88\u606F" aria-hidden="true">#</a> 10.1 \u751F\u4EA7\u8005\u4FDD\u8BC1\u4E0D\u4E22\u6D88\u606F</h3><p>\u751F\u4EA7\u7AEF\u5982\u4F55\u4FDD\u8BC1\u4E0D\u4E22\u6D88\u606F\u5462\uFF1F\u786E\u4FDD\u751F\u4EA7\u7684\u6D88\u606F\u80FD\u987A\u5229\u5230\u8FBE\u5B58\u50A8\u7AEF\u3002</p><p>\u5982\u679C\u662F<code>RocketMQ</code>\u6D88\u606F\u4E2D\u95F4\u4EF6\u7684\u8BDD\uFF0C<code>Producer</code>\u751F\u4EA7\u8005\u63D0\u4F9B\u4E86\u4E09\u79CD\u53D1\u9001\u6D88\u606F\u7684\u65B9\u5F0F\uFF0C\u5206\u522B\u662F\uFF1A</p><ul><li>\u540C\u6B65\u53D1\u9001</li><li>\u5F02\u6B65\u53D1\u9001</li><li>\u5355\u5411\u53D1\u9001</li></ul><p>\u751F\u4EA7\u8005\u8981\u60F3\u53D1\u6D88\u606F\u65F6\u4FDD\u8BC1\u6D88\u606F\u4E0D\u4E22\u5931\uFF0C\u53EF\u4EE5\uFF1A</p><ul><li>\u91C7\u7528\u540C\u6B65\u65B9\u5F0F\u53D1\u9001\uFF0Csend\u6D88\u606F\u65B9\u6CD5\u8FD4\u56DE\u6210\u529F\u72B6\u6001\uFF0C\u5373\u6D88\u606F\u6B63\u5E38\u5230\u8FBE\u4E86\u5B58\u50A8\u7AEF<code>Broker</code>\u3002</li><li>\u5982\u679C<code>send</code>\u6D88\u606F\u5F02\u5E38\u6216\u8005\u8FD4\u56DE\u975E\u6210\u529F\u72B6\u6001\uFF0C\u53EF\u4EE5\u53D1\u8D77\u91CD\u8BD5\u3002</li><li>\u53EF\u4EE5\u4F7F\u7528\u4E8B\u52A1\u6D88\u606F\uFF0C<code>RocketMQ</code>\u7684\u4E8B\u52A1\u6D88\u606F\u673A\u5236\u5C31\u662F\u4E3A\u4E86\u4FDD\u8BC1\u96F6\u4E22\u5931\u6765\u8BBE\u8BA1\u7684</li></ul><h3 id="_10-2-\u5B58\u50A8\u7AEF\u4E0D\u4E22\u6D88\u606F" tabindex="-1"><a class="header-anchor" href="#_10-2-\u5B58\u50A8\u7AEF\u4E0D\u4E22\u6D88\u606F" aria-hidden="true">#</a> 10.2 \u5B58\u50A8\u7AEF\u4E0D\u4E22\u6D88\u606F</h3><p>\u5982\u4F55\u4FDD\u8BC1\u5B58\u50A8\u7AEF\u7684\u6D88\u606F\u4E0D\u4E22\u5931\u5462\uFF1F\u786E\u4FDD\u6D88\u606F\u6301\u4E45\u5316\u5230\u78C1\u76D8\uFF0C\u90A3\u5C31\u662F\u5237\u76D8\u673A\u5236\u561B\u3002</p><p>\u5237\u76D8\u673A\u5236\u5206<strong>\u540C\u6B65\u5237\u76D8\u548C\u5F02\u6B65\u5237\u76D8</strong>\uFF1A</p><ul><li>\u540C\u6B65\u5237\u76D8\uFF1A\u751F\u4EA7\u8005\u6D88\u606F\u53D1\u8FC7\u6765\u65F6\uFF0C\u53EA\u6709\u6301\u4E45\u5316\u5230\u78C1\u76D8\uFF0C<code>RocketMQ</code>\u7684\u5B58\u50A8\u7AEF<code>Broker</code>\u624D\u8FD4\u56DE\u4E00\u4E2A\u6210\u529F\u7684ACK\u54CD\u5E94\u3002\u5B83\u4FDD\u8BC1\u6D88\u606F\u4E0D\u4E22\u5931\uFF0C\u4F46\u662F\u5F71\u54CD\u4E86\u6027\u80FD\u3002</li><li>\u5F02\u6B65\u5237\u76D8\uFF1A\u53EA\u8981\u6D88\u606F\u5199\u5165<code>PageCache</code>\u7F13\u5B58\uFF0C\u5C31\u8FD4\u56DE\u4E00\u4E2A\u6210\u529F\u7684ACK\u54CD\u5E94\u3002\u8FD9\u6837\u63D0\u9AD8\u4E86MQ\u7684\u6027\u80FD\uFF0C\u4F46\u662F\u5982\u679C\u8FD9\u65F6\u5019\u673A\u5668\u65AD\u7535\u4E86\uFF0C\u5C31\u4F1A\u4E22\u5931\u6D88\u606F\u3002</li></ul><p>\u9664\u4E86\u540C\u6B65\u5237\u76D8\u673A\u5236\uFF0C\u8FD8\u6709\u4E00\u4E2A\u7EF4\u5EA6\u9700\u8981\u8003\u8651\u3002<code>Broker</code>\u4E00\u822C\u662F\u96C6\u7FA4\u90E8\u7F72\u7684\uFF0C\u6709\u4E3B\u8282\u70B9\u548C\u4ECE\u8282\u70B9\u3002\u6D88\u606F\u5230<code>Broker</code>\u5B58\u50A8\u7AEF\uFF0C\u53EA\u6709\u4E3B\u8282\u70B9\u548C\u4ECE\u8282\u70B9\u90FD\u5199\u5165\u6210\u529F\uFF0C\u624D\u53CD\u9988\u6210\u529F\u7684<code>ack</code>\u7ED9\u751F\u4EA7\u8005\u3002\u8FD9\u5C31\u662F<strong>\u540C\u6B65\u590D\u5236</strong>\uFF0C\u5B83\u4FDD\u8BC1\u4E86\u6D88\u606F\u4E0D\u4E22\u5931\uFF0C\u4F46\u662F\u964D\u4F4E\u4E86\u7CFB\u7EDF\u7684\u541E\u5410\u91CF\u3002\u4E0E\u4E4B\u5BF9\u5E94\u5373\u662F<strong>\u5F02\u6B65\u590D\u5236</strong>\uFF0C\u53EA\u8981\u6D88\u606F\u5199\u5165\u4E3B\u8282\u70B9\u6210\u529F\uFF0C\u5C31\u8FD4\u56DE\u6210\u529F\u7684<code>ack</code>\uFF0C\u5B83\u901F\u5EA6\u5FEB\uFF0C\u4F46\u662F\u4F1A\u6709\u6027\u80FD\u95EE\u9898\u3002</p><h3 id="_10-3-\u6D88\u8D39\u9636\u6BB5\u4E0D\u4E22\u6D88\u606F" tabindex="-1"><a class="header-anchor" href="#_10-3-\u6D88\u8D39\u9636\u6BB5\u4E0D\u4E22\u6D88\u606F" aria-hidden="true">#</a> 10.3 \u6D88\u8D39\u9636\u6BB5\u4E0D\u4E22\u6D88\u606F</h3><p>\u6D88\u8D39\u8005<strong>\u6267\u884C\u5B8C\u4E1A\u52A1\u903B\u8F91</strong>\uFF0C\u518D\u53CD\u9988\u4F1A<code>Broker</code>\u8BF4\u6D88\u8D39\u6210\u529F\uFF0C\u8FD9\u6837\u624D\u53EF\u4EE5\u4FDD\u8BC1\u6D88\u8D39\u9636\u6BB5\u4E0D\u4E22\u6D88\u606F\u3002</p><h2 id="_11-\u4E8B\u52A1\u6D88\u606F\u662F\u5426\u4E86\u89E3-\u573A\u666F\u9898-\u6BD4\u5982\u4E0B\u5355\u6E05\u7A7A\u8D2D\u7269\u8F66-\u4F60\u662F\u5982\u4F55\u8BBE\u8BA1\u7684" tabindex="-1"><a class="header-anchor" href="#_11-\u4E8B\u52A1\u6D88\u606F\u662F\u5426\u4E86\u89E3-\u573A\u666F\u9898-\u6BD4\u5982\u4E0B\u5355\u6E05\u7A7A\u8D2D\u7269\u8F66-\u4F60\u662F\u5982\u4F55\u8BBE\u8BA1\u7684" aria-hidden="true">#</a> 11. \u4E8B\u52A1\u6D88\u606F\u662F\u5426\u4E86\u89E3\uFF1F\u573A\u666F\u9898\uFF1A\u6BD4\u5982\u4E0B\u5355\u6E05\u7A7A\u8D2D\u7269\u8F66\uFF0C\u4F60\u662F\u5982\u4F55\u8BBE\u8BA1\u7684\uFF1F</h2><p>\u4E8B\u52A1\u6D88\u606F\u4E3B\u8981\u7528\u6765\u89E3\u51B3\u6D88\u606F\u751F\u4EA7\u8005\u548C\u6D88\u606F\u6D88\u8D39\u8005\u7684<strong>\u6570\u636E\u4E00\u81F4\u6027</strong>\u95EE\u9898\u3002\u6211\u4EEC\u5148\u6765\u56DE\u5FC6\u4E00\u4E0B\uFF1A\u4E00\u6761\u666E\u901A\u7684\u6D88\u606F\u961F\u5217\u6D88\u606F\uFF0C\u4ECE\u4EA7\u751F\u5230\u88AB\u6D88\u8D39\uFF0C\u7ECF\u5386\u7684\u6D41\u7A0B\uFF1A</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PoF8jo1Pmpyab6GY4OsOf8bARCwJPIAib2EBLoKW7wmkPG1Kx4roia2FvKkq1qMROmTm0ia0IwahtPhqX95ahvDIw/640?wx_fmt=png" alt=""></p><ol><li>\u751F\u4EA7\u8005\u4EA7\u751F\u6D88\u606F\uFF0C\u53D1\u9001\u5230MQ\u670D\u52A1\u5668</li><li>MQ\u6536\u5230\u6D88\u606F\u540E\uFF0C\u5C06\u6D88\u606F\u6301\u4E45\u5316\u5230\u5B58\u50A8\u7CFB\u7EDF\u3002</li><li>MQ\u670D\u52A1\u5668\u8FD4\u56DEACk\u5230\u751F\u4EA7\u8005\u3002</li><li>MQ\u670D\u52A1\u5668\u628A\u6D88\u606Fpush\u7ED9\u6D88\u8D39\u8005</li><li>\u6D88\u8D39\u8005\u6D88\u8D39\u5B8C\u6D88\u606F\uFF0C\u54CD\u5E94ACK</li><li>MQ\u670D\u52A1\u5668\u6536\u5230ACK\uFF0C\u8BA4\u4E3A\u6D88\u606F\u6D88\u8D39\u6210\u529F\uFF0C\u5373\u5728\u5B58\u50A8\u4E2D\u5220\u9664\u6D88\u606F\u3002</li></ol><p><strong>\u6D88\u606F\u961F\u5217\u7684\u4E8B\u52A1\u6D88\u606F\u6D41\u7A0B\u662F\u600E\u6837\u7684\u5462\uFF1F</strong></p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PoF8jo1Pmpyab6GY4OsOf8bARCwJPIAib79pCtYibaibSzQyf5y9qBaJA5Ikm6orohQoNBJ7aMa8daeCX42FcIkLQ/640?wx_fmt=png" alt=""></p><ol><li>\u751F\u4EA7\u8005\u4EA7\u751F\u6D88\u606F\uFF0C\u53D1\u9001\u4E00\u6761\u534A\u4E8B\u52A1\u6D88\u606F\u5230MQ\u670D\u52A1\u5668</li><li>MQ\u6536\u5230\u6D88\u606F\u540E\uFF0C\u5C06\u6D88\u606F\u6301\u4E45\u5316\u5230\u5B58\u50A8\u7CFB\u7EDF\uFF0C\u8FD9\u6761\u6D88\u606F\u7684\u72B6\u6001\u662F\u5F85\u53D1\u9001\u72B6\u6001\u3002</li><li>MQ\u670D\u52A1\u5668\u8FD4\u56DEACK\u786E\u8BA4\u5230\u751F\u4EA7\u8005\uFF0C\u6B64\u65F6MQ\u4E0D\u4F1A\u89E6\u53D1\u6D88\u606F\u63A8\u9001\u4E8B\u4EF6</li><li>\u751F\u4EA7\u8005\u6267\u884C\u672C\u5730\u4E8B\u52A1</li><li>\u5982\u679C\u672C\u5730\u4E8B\u52A1\u6267\u884C\u6210\u529F\uFF0C\u5373commit\u6267\u884C\u7ED3\u679C\u5230MQ\u670D\u52A1\u5668\uFF1B\u5982\u679C\u6267\u884C\u5931\u8D25\uFF0C\u53D1\u9001rollback\u3002</li><li>\u5982\u679C\u662F\u6B63\u5E38\u7684commit\uFF0CMQ\u670D\u52A1\u5668\u66F4\u65B0\u6D88\u606F\u72B6\u6001\u4E3A\u53EF\u53D1\u9001\uFF1B\u5982\u679C\u662Frollback\uFF0C\u5373\u5220\u9664\u6D88\u606F\u3002</li><li>\u5982\u679C\u6D88\u606F\u72B6\u6001\u66F4\u65B0\u4E3A\u53EF\u53D1\u9001\uFF0C\u5219MQ\u670D\u52A1\u5668\u4F1Apush\u6D88\u606F\u7ED9\u6D88\u8D39\u8005\u3002\u6D88\u8D39\u8005\u6D88\u8D39\u5B8C\u5C31\u56DEACK\u3002</li><li>\u5982\u679CMQ\u670D\u52A1\u5668\u957F\u65F6\u95F4\u6CA1\u6709\u6536\u5230\u751F\u4EA7\u8005\u7684commit\u6216\u8005rollback\uFF0C\u5B83\u4F1A\u53CD\u67E5\u751F\u4EA7\u8005\uFF0C\u7136\u540E\u6839\u636E\u67E5\u8BE2\u5230\u7684\u7ED3\u679C\u6267\u884C\u6700\u7EC8\u72B6\u6001\u3002</li></ol><p>\u6211\u4EEC\u4E3E\u4E2A\u4E0B<strong>\u8BA2\u5355\u6E05\u7A7A\u8D2D\u7269\u8F66</strong>\u7684\u4F8B\u5B50\u5427\u3002\u8BA2\u5355\u7CFB\u7EDF\u521B\u5EFA\u5B8C\u8BA2\u5355\u540E\uFF0C\u7136\u540E\u53D1\u6D88\u606F\u7ED9\u4E0B\u6E38\u7CFB\u7EDF\u8D2D\u7269\u8F66\u7CFB\u7EDF\uFF0C\u6E05\u7A7A\u8D2D\u7269\u8F66\u3002</p><ol><li>\u751F\u4EA7\u8005\uFF08\u8BA2\u5355\u7CFB\u7EDF\uFF09\u4EA7\u751F\u6D88\u606F\uFF0C\u53D1\u9001\u4E00\u6761\u534A\u4E8B\u52A1\u6D88\u606F\u5230MQ\u670D\u52A1\u5668</li><li>MQ\u6536\u5230\u6D88\u606F\u540E\uFF0C\u5C06\u6D88\u606F\u6301\u4E45\u5316\u5230\u5B58\u50A8\u7CFB\u7EDF\uFF0C\u8FD9\u6761\u6D88\u606F\u7684\u72B6\u6001\u662F\u5F85\u53D1\u9001\u72B6\u6001\u3002</li><li>MQ\u670D\u52A1\u5668\u8FD4\u56DEACK\u786E\u8BA4\u5230\u751F\u4EA7\u8005\uFF0C\u6B64\u65F6MQ\u4E0D\u4F1A\u89E6\u53D1\u6D88\u606F\u63A8\u9001\u4E8B\u4EF6</li><li>\u751F\u4EA7\u8005\u6267\u884C\u672C\u5730\u4E8B\u52A1\uFF08\u8BA2\u5355\u521B\u5EFA\u6210\u529F\uFF0C\u63D0\u4EA4\u4E8B\u52A1\u6D88\u606F\uFF09</li><li>\u5982\u679C\u672C\u5730\u4E8B\u52A1\u6267\u884C\u6210\u529F\uFF0C\u5373commit\u6267\u884C\u7ED3\u679C\u5230MQ\u670D\u52A1\u5668\uFF1B\u5982\u679C\u6267\u884C\u5931\u8D25\uFF0C\u53D1\u9001rollback\u3002</li><li>\u5982\u679C\u662Fcommit\u6B63\u5E38\u63D0\u4EA4\uFF0CMQ\u670D\u52A1\u5668\u66F4\u65B0\u6D88\u606F\u72B6\u6001\u4E3A<strong>\u53EF\u53D1\u9001</strong>\uFF1B\u5982\u679C\u662Frollback\uFF0C\u5373<strong>\u5220\u9664\u6D88\u606F</strong>\u3002</li><li>\u5982\u679C\u6D88\u606F\u72B6\u6001\u66F4\u65B0\u4E3A\u53EF\u53D1\u9001\uFF0C\u5219MQ\u670D\u52A1\u5668\u4F1Apush\u6D88\u606F\u7ED9\u6D88\u8D39\u8005\uFF08\u8D2D\u7269\u8F66\u7CFB\u7EDF\uFF09\u3002\u6D88\u8D39\u8005\u6D88\u8D39\u5B8C\uFF08\u5373\u62FF\u5230\u8BA2\u5355\u6D88\u606F\uFF0C\u6E05\u7A7A\u8D2D\u7269\u8F66\u6210\u529F\uFF09\u5C31\u5E94\u7B54ACK\u3002</li><li>\u5982\u679CMQ\u670D\u52A1\u5668\u957F\u65F6\u95F4\u6CA1\u6709\u6536\u5230\u751F\u4EA7\u8005\u7684commit\u6216\u8005rollback\uFF0C\u5B83\u4F1A\u53CD\u67E5\u751F\u4EA7\u8005\uFF0C\u7136\u540E\u6839\u636E\u67E5\u8BE2\u5230\u7684\u7ED3\u679C\uFF08\u56DE\u6EDA\u64CD\u4F5C\u6216\u8005\u91CD\u65B0\u53D1\u9001\u6D88\u606F\uFF09\u6267\u884C\u6700\u7EC8\u72B6\u6001\u3002</li></ol><p>\u6709\u4E9B\u4F19\u4F34\u53EF\u80FD\u6709\u7591\u60D1\uFF0C\u5982\u679C\u6D88\u8D39\u8005\u6D88\u8D39\u5931\u8D25\u600E\u4E48\u529E\u5462\uFF1F\u90A3\u6570\u636E\u662F\u4E0D\u662F\u4E0D\u4E00\u81F4\u5566\uFF1F\u6240\u4EE5\u5C31\u9700\u8981\u6D88\u8D39\u8005\u6D88\u8D39\u6210\u529F\uFF0C\u6267\u884C\u4E1A\u52A1\u903B\u8F91\u6210\u529F\uFF0C\u518D\u53CD\u9988ack\u561B\u3002\u5982\u679C\u6D88\u8D39\u8005\u6D88\u8D39\u5931\u8D25\uFF0C\u90A3\u5C31\u81EA\u52A8\u91CD\u8BD5\u561B\uFF0C\u63A5\u53E3\u652F\u6301\u5E42\u7B49\u5373\u53EF\u3002</p><h2 id="_12-\u5982\u4F55\u5FEB\u901F\u5224\u65AD\u4E00\u4E2A\u6570\u662F\u5947\u6570\u8FD8\u662F\u5076\u6570-\u9664\u5F00\u5BF92\u53D6\u4F59\u5462\u3002" tabindex="-1"><a class="header-anchor" href="#_12-\u5982\u4F55\u5FEB\u901F\u5224\u65AD\u4E00\u4E2A\u6570\u662F\u5947\u6570\u8FD8\u662F\u5076\u6570-\u9664\u5F00\u5BF92\u53D6\u4F59\u5462\u3002" aria-hidden="true">#</a> 12. \u5982\u4F55\u5FEB\u901F\u5224\u65AD\u4E00\u4E2A\u6570\u662F\u5947\u6570\u8FD8\u662F\u5076\u6570\uFF0C\u9664\u5F00\u5BF92\u53D6\u4F59\u5462\u3002</h2><p>\u5224\u65AD\u4E00\u4E2A\u6570\u662F\u5947\u6570\u8FD8\u662F\u5076\u6570\uFF0C\u6211\u4EEC\u6700\u5BB9\u6613\u60F3\u5230\u7684\u5C31\u662F\u5BF92\u53D6\u4F59\u3002</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>if( x % 2 )  
+
+// \u5947\u6570  
+
+else  
+
+// \u5076\u6570  
+
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>\u8FD8\u6709\u4E00\u79CD\u65B9\u6CD5\uFF0C\u5C31\u662F\u4E0E1\u76F8\u4E0E\uFF08 <code>&amp;1</code>\uFF09\uFF0C\u5177\u4F53\u5B9E\u73B0\u5982\u4E0B\uFF1A</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>if( x &amp; 1 )  
+
+// \u5947\u6570  
+
+else  
+
+// \u5076\u6570  
+
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h2 id="_13-spring\u58F0\u660E\u5F0F\u4E8B\u52A1\u539F\u7406-\u54EA\u4E9B\u573A\u666F\u4E8B\u52A1\u4F1A\u5931\u6548" tabindex="-1"><a class="header-anchor" href="#_13-spring\u58F0\u660E\u5F0F\u4E8B\u52A1\u539F\u7406-\u54EA\u4E9B\u573A\u666F\u4E8B\u52A1\u4F1A\u5931\u6548" aria-hidden="true">#</a> 13. Spring\u58F0\u660E\u5F0F\u4E8B\u52A1\u539F\u7406\uFF1F\u54EA\u4E9B\u573A\u666F\u4E8B\u52A1\u4F1A\u5931\u6548\uFF1F</h2><h3 id="_13-1-\u58F0\u660E\u5F0F\u4E8B\u52A1\u539F\u7406" tabindex="-1"><a class="header-anchor" href="#_13-1-\u58F0\u660E\u5F0F\u4E8B\u52A1\u539F\u7406" aria-hidden="true">#</a> 13.1 \u58F0\u660E\u5F0F\u4E8B\u52A1\u539F\u7406</h3><p>spring\u58F0\u660E\u5F0F\u4E8B\u52A1\uFF0C\u5373<code>@Transactional</code>,\u5B83\u53EF\u4EE5\u5E2E\u52A9\u6211\u4EEC\u628A\u4E8B\u52A1\u5F00\u542F\u3001\u63D0\u4EA4\u6216\u8005\u56DE\u6EDA\u7684\u64CD\u4F5C\uFF0C\u901A\u8FC7Aop\u7684\u65B9\u5F0F\u8FDB\u884C\u7BA1\u7406\u3002</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PoF8jo1Pmpyab6GY4OsOf8bARCwJPIAibPoVt2fkoUtViabEcOricib1UlGsUYMCFd5RtiaHJvtJH9xUhzJNIibOEY3g/640?wx_fmt=png" alt=""></p><p>\u5728spring\u7684bean\u7684\u521D\u59CB\u5316\u8FC7\u7A0B\u4E2D\uFF0C\u5C31\u9700\u8981\u5BF9\u5B9E\u4F8B\u5316\u7684bean\u8FDB\u884C\u4EE3\u7406\uFF0C\u5E76\u4E14\u751F\u6210\u4EE3\u7406\u5BF9\u8C61\u3002\u751F\u6210\u4EE3\u7406\u5BF9\u8C61\u7684\u4EE3\u7406\u903B\u8F91\u4E2D\uFF0C\u8FDB\u884C\u65B9\u6CD5\u8C03\u7528\u65F6\uFF0C\u9700\u8981\u5148\u83B7\u53D6\u5207\u9762\u903B\u8F91\uFF0C@Transactional\u6CE8\u89E3\u7684\u5207\u9762\u903B\u8F91\u7C7B\u4F3C\u4E8E@Around\uFF0C\u5728spring\u4E2D\u662F\u5B9E\u73B0\u4E00\u79CD\u7C7B\u4F3C\u4EE3\u7406\u903B\u8F91\u3002</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PoF8jo1Pmpyab6GY4OsOf8bARCwJPIAibabVia8uVswlbU6jDLmiaVBCnUia7WicSIodG9n25NBZKialicfvN9Wh2mcLQ/640?wx_fmt=png" alt=""></p><h3 id="_13-2-spring\u58F0\u660E\u5F0F\u4E8B\u52A1\u54EA\u4E9B\u573A\u666F\u4F1A\u5931\u6548" tabindex="-1"><a class="header-anchor" href="#_13-2-spring\u58F0\u660E\u5F0F\u4E8B\u52A1\u54EA\u4E9B\u573A\u666F\u4F1A\u5931\u6548" aria-hidden="true">#</a> 13.2 spring\u58F0\u660E\u5F0F\u4E8B\u52A1\u54EA\u4E9B\u573A\u666F\u4F1A\u5931\u6548</h3><ul><li>\u65B9\u6CD5\u7684\u8BBF\u95EE\u6743\u9650\u5FC5\u987B\u662Fpublic\uFF0C\u5176\u4ED6private\u7B49\u6743\u9650\uFF0C\u4E8B\u52A1\u5931\u6548</li><li>\u65B9\u6CD5\u88AB\u5B9A\u4E49\u6210\u4E86final\u7684\uFF0C\u8FD9\u6837\u4F1A\u5BFC\u81F4\u4E8B\u52A1\u5931\u6548\u3002</li><li>\u5728\u540C\u4E00\u4E2A\u7C7B\u4E2D\u7684\u65B9\u6CD5\u76F4\u63A5\u5185\u90E8\u8C03\u7528\uFF0C\u4F1A\u5BFC\u81F4\u4E8B\u52A1\u5931\u6548\u3002</li><li>\u4E00\u4E2A\u65B9\u6CD5\u5982\u679C\u6CA1\u4EA4\u7ED9spring\u7BA1\u7406\uFF0C\u5C31\u4E0D\u4F1A\u751F\u6210spring\u4E8B\u52A1\u3002</li><li>\u591A\u7EBF\u7A0B\u8C03\u7528\uFF0C\u4E24\u4E2A\u65B9\u6CD5\u4E0D\u5728\u540C\u4E00\u4E2A\u7EBF\u7A0B\u4E2D\uFF0C\u83B7\u53D6\u5230\u7684\u6570\u636E\u5E93\u8FDE\u63A5\u4E0D\u4E00\u6837\u7684\u3002</li><li>\u8868\u7684\u5B58\u50A8\u5F15\u64CE\u4E0D\u652F\u6301\u4E8B\u52A1</li><li>\u5982\u679C\u81EA\u5DF1try...catch\u8BEF\u541E\u4E86\u5F02\u5E38\uFF0C\u4E8B\u52A1\u5931\u6548\u3002</li><li>\u9519\u8BEF\u7684\u4F20\u64AD</li></ul><h2 id="_14-\u4F60\u4EEC\u662F\u5FAE\u670D\u52A1\u67B6\u6784\u561B-\u5982\u679C\u4F60\u6765\u8BBE\u8BA1\u4E00\u4E2A\u7C7B\u4F3C\u6DD8\u5B9D\u7684\u7CFB\u7EDF-\u4F60\u600E\u4E48\u5212\u5206\u5FAE\u670D\u52A1" tabindex="-1"><a class="header-anchor" href="#_14-\u4F60\u4EEC\u662F\u5FAE\u670D\u52A1\u67B6\u6784\u561B-\u5982\u679C\u4F60\u6765\u8BBE\u8BA1\u4E00\u4E2A\u7C7B\u4F3C\u6DD8\u5B9D\u7684\u7CFB\u7EDF-\u4F60\u600E\u4E48\u5212\u5206\u5FAE\u670D\u52A1" aria-hidden="true">#</a> 14. \u4F60\u4EEC\u662F\u5FAE\u670D\u52A1\u67B6\u6784\u561B\uFF1F\u5982\u679C\u4F60\u6765\u8BBE\u8BA1\u4E00\u4E2A\u7C7B\u4F3C\u6DD8\u5B9D\u7684\u7CFB\u7EDF\uFF0C\u4F60\u600E\u4E48\u5212\u5206\u5FAE\u670D\u52A1\uFF1F</h2><p>\u53EF\u4EE5\u6309\u4E1A\u52A1\u9886\u57DF\u3001\u529F\u80FD\u3001\u91CD\u8981\u7A0B\u5EA6\u8FDB\u884C\u5212\u5206\u3002</p><ul><li>\u53EF\u4EE5\u6309\u4E1A\u52A1\u9886\u57DF\uFF0C\u628A\u7528\u6237\u3001\u793E\u533A\u3001\u5546\u54C1\u4FE1\u606F\u3001\u6D88\u606F\u7B49\u6A21\u5757\u7B49\u5212\u5206\u3002</li><li>\u5355\u4E00\u529F\u80FD\u804C\u8D23\uFF0C\u6309\u529F\u80FD\u62C6\u5206\uFF0C\u6BD4\u5982\u8BA2\u5355\u3001\u652F\u4ED8\u3001\u7269\u6D41\u3001\u6743\u9650\u3002</li><li>\u6309\u91CD\u8981\u7A0B\u5EA6\u5212\u5206\uFF0C\u533A\u5206\u6838\u5FC3\u548C\u975E\u6838\u5FC3\u529F\u80FD\uFF0C\u6BD4\u5982\u652F\u4ED8\u3001\u8BA2\u5355\u5C31\u662F\u6838\u5FC3\u529F\u80FD\u3002</li></ul><h2 id="_15-\u4F60\u4EEC\u662F\u600E\u4E48\u5206\u5E93\u5206\u8868\u7684-\u5206\u5E03\u5F0Fid\u5982\u4F55\u751F\u6210" tabindex="-1"><a class="header-anchor" href="#_15-\u4F60\u4EEC\u662F\u600E\u4E48\u5206\u5E93\u5206\u8868\u7684-\u5206\u5E03\u5F0Fid\u5982\u4F55\u751F\u6210" aria-hidden="true">#</a> 15. \u4F60\u4EEC\u662F\u600E\u4E48\u5206\u5E93\u5206\u8868\u7684\uFF1F\u5206\u5E03\u5F0FID\u5982\u4F55\u751F\u6210\uFF1F</h2><p>\u5982\u679C\u662F\u6211\u4EEC\u516C\u53F8\u7684\u8BDD\uFF0C\u4F7F\u7528\u4E86\u6C34\u5E73\u5206\u5E93\u7684\u65B9\u5F0F\uFF0C\u5C31\u662F\u4E00\u4E2A\u7528\u6237\u6CE8\u518C\u65F6\uFF0C\u5C31\u5212\u5206\u4E86\u5C5E\u4E8E\u54EA\u4E2A\u6570\u636E\u5E93\uFF0C\u7136\u540E\u5177\u4F53\u7684\u8868\u7ED3\u6784\u662F\u4E00\u6837\u7684\u3002</p><p>\u4E1A\u754C\u8FD8\u6709\u5782\u76F4\u5206\u5E93\uFF0C\u5C31\u662F\u6309\u7167\u4E0D\u540C\u7684\u7CFB\u7EDF\u4E2D\u7684\u4E0D\u540C\u4E1A\u52A1\u8FDB\u884C\u62C6\u5206\uFF0C\u6BD4\u5982\u62C6\u5206\u6210\u7528\u6237\u5E93\u3001\u8BA2\u5355\u5E93\u3001\u79EF\u5206\u5E93\u3001\u5546\u54C1\u5E93\uFF0C\u628A\u5B83\u4EEC\u90E8\u7F72\u5728\u4E0D\u540C\u7684\u6570\u636E\u5E93\u670D\u52A1\u5668\u3002</p><p>\u5206\u8868\u7684\u8BDD\u4E5F\u6709\u6C34\u5E73\u5206\u8868\u548C\u5782\u76F4\u5206\u8868\uFF0C\u5782\u76F4\u5206\u8868\u5C31\u662F\u5C06\u4E00\u4E9B\u4E0D\u5E38\u7528\u7684\u3001\u6570\u636E\u8F83\u5927\u6216\u8005\u957F\u5EA6\u8F83\u957F\u7684\u5217\u62C6\u5206\u5230\u53E6\u5916\u4E00\u5F20\u8868\uFF0C\u6C34\u5E73\u5206\u8868\u5C31\u662F\u53EF\u4EE5\u6309\u7167\u67D0\u79CD\u89C4\u5219\uFF08\u5982hash\u53D6\u6A21\u3001range\uFF09\uFF0C\u628A\u6570\u636E\u5207\u5206\u5230\u591A\u5F20\u8868\u53BB\u3002\u4E00\u5F20\u8BA2\u5355\u8868\uFF0C\u6309\u65F6\u95F4range\u62C6\u5206\u5982\u4E0B\uFF1A</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PoF8jo1Pmpyab6GY4OsOf8bARCwJPIAibibwxSUuBLQicjr2q2DxQGkuwLfzObHFtghxZs7U1zY36UauDguV8tTCg/640?wx_fmt=png" alt=""></p><p><strong>range\u5212\u5206\u5229\u4E8E\u6570\u636E\u8FC1\u79FB\uFF0C\u4F46\u662F\u5B58\u5728\u6570\u636E\u70ED\u70B9\u95EE\u9898\u3002hash\u53D6\u6A21\u5212\u5206\uFF0C\u4E0D\u4F1A\u5B58\u5728\u660E\u663E\u7684\u70ED\u70B9\u95EE\u9898\uFF0C\u4F46\u662F\u4E0D\u5229\u4E8E\u6269\u5BB9\u3002\u53EF\u4EE5range+hash\u53D6\u6A21\u7ED3\u5408\u4F7F\u7528\u3002</strong></p><p><strong>\u5206\u5E03\u5F0FID\u53EF\u4EE5\u4F7F\u7528\u96EA\u82B1\u7B97\u6CD5\u751F\u6210</strong></p><blockquote><p>\u96EA\u82B1\u7B97\u6CD5\u662F\u4E00\u79CD\u751F\u6210\u5206\u5E03\u5F0F\u5168\u5C40\u552F\u4E00ID\u7684\u7B97\u6CD5\uFF0C\u751F\u6210\u7684ID\u79F0\u4E3ASnowflake IDs\u3002\u8FD9\u79CD\u7B97\u6CD5\u7531Twitter\u521B\u5EFA\uFF0C\u5E76\u7528\u4E8E\u63A8\u6587\u7684ID\u3002</p></blockquote><p>\u4E00\u4E2ASnowflake ID\u670964\u4F4D\u3002</p><ul><li>\u7B2C1\u4F4D\uFF1AJava\u4E2Dlong\u7684\u6700\u9AD8\u4F4D\u662F\u7B26\u53F7\u4F4D\u4EE3\u8868\u6B63\u8D1F\uFF0C\u6B63\u6570\u662F0\uFF0C\u8D1F\u6570\u662F1\uFF0C\u4E00\u822C\u751F\u6210ID\u90FD\u4E3A\u6B63\u6570\uFF0C\u6240\u4EE5\u9ED8\u8BA4\u4E3A0\u3002</li><li>\u63A5\u4E0B\u6765\u524D41\u4F4D\u662F\u65F6\u95F4\u6233\uFF0C\u8868\u793A\u4E86\u81EA\u9009\u5B9A\u7684\u65F6\u671F\u4EE5\u6765\u7684\u6BEB\u79D2\u6570\u3002</li><li>\u63A5\u4E0B\u6765\u768410\u4F4D\u4EE3\u8868\u8BA1\u7B97\u673AID\uFF0C\u9632\u6B62\u51B2\u7A81\u3002</li><li>\u5176\u4F5912\u4F4D\u4EE3\u8868\u6BCF\u53F0\u673A\u5668\u4E0A\u751F\u6210ID\u7684\u5E8F\u5217\u53F7\uFF0C\u8FD9\u5141\u8BB8\u5728\u540C\u4E00\u6BEB\u79D2\u5185\u521B\u5EFA\u591A\u4E2ASnowflake ID\u3002</li></ul><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PoF8jo1Pmpyab6GY4OsOf8bARCwJPIAibtbZ2rSkCTXPD8icnFvCnSfvWDrXvLiaibnrdOBXCc6hoViadUyEuic9tfJg/640?wx_fmt=png" alt=""></p><h2 id="_16-\u6240\u6709\u5F02\u5E38\u7684\u5171\u540C\u7684\u7956\u5148\u662F-\u8FD0\u884C\u65F6\u5F02\u5E38\u6709\u54EA\u51E0\u4E2A" tabindex="-1"><a class="header-anchor" href="#_16-\u6240\u6709\u5F02\u5E38\u7684\u5171\u540C\u7684\u7956\u5148\u662F-\u8FD0\u884C\u65F6\u5F02\u5E38\u6709\u54EA\u51E0\u4E2A" aria-hidden="true">#</a> 16. \u6240\u6709\u5F02\u5E38\u7684\u5171\u540C\u7684\u7956\u5148\u662F\uFF1F\u8FD0\u884C\u65F6\u5F02\u5E38\u6709\u54EA\u51E0\u4E2A\uFF1F</h2><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PoF8jo1Pmpyab6GY4OsOf8bARCwJPIAibpAbukOczHzcpQcicFGMUrNoibCC40seujqTicWM4iaRJHmATp1vhK9kTdA/640?wx_fmt=png" alt=""></p><p>Java \u5F02\u5E38\u7684\u9876\u5C42\u7236\u7C7B\u662F<code>Throwable</code>\uFF0C\u5B83\u751F\u4E86\u4E24\u4E2A\u513F\u5B50\uFF0C\u5927\u513F\u5B50\u53EB<code>Error</code>,\u4E8C\u513F\u5B50\u53EB<code>Exception</code>\u3002</p><ul><li><strong>Error</strong>\uFF1A\u662F\u7A0B\u5E8F\u2F46\u6CD5\u5904\u7406\u7684\u9519\u8BEF\uFF0C\u4E00\u822C\u8868\u793A\u7CFB\u7EDF\u9519\u8BEF\uFF0C\u4F8B\u5982\u865A\u62DF\u673A\u76F8\u5173\u7684\u9519\u8BEF<code>OutOfMemoryError</code></li><li><strong>Exception</strong>\uFF1A\u7A0B\u5E8F\u672C\u8EAB\u53EF\u4EE5\u5904\u7406\u7684\u5F02\u5E38\u3002\u5B83\u53EF\u4EE5\u5206\u4E3ARuntimeException\uFF08\u8FD0\u884C\u65F6\u5F02\u5E38\uFF09\u548CCheckedException\uFF08\u53EF\u68C0\u67E5\u7684\u5F02\u5E38\uFF09\u3002</li></ul><p><strong>\u4EC0\u4E48\u662FRuntimeException\uFF08\u8FD0\u884C\u65F6\u5F02\u5E38\uFF09</strong>\uFF1F</p><blockquote><p>\u8FD0\u884C\u65F6\u5F02\u5E38\u662F\u4E0D\u68C0\u67E5\u5F02\u5E38\uFF0C\u7A0B\u5E8F\u4E2D\u53EF\u4EE5\u9009\u62E9\u6355\u83B7\u5904\u7406\uFF0C\u4E5F\u53EF\u4EE5\u4E0D\u5904\u7406\u3002\u8FD9\u4E9B\u5F02\u5E38\u4E00\u822C\u662F\u7531\u7A0B\u5E8F\u903B\u8F91\u9519\u8BEF\u5F15\u8D77\u7684\uFF0C\u7A0B\u5E8F\u5E94\u8BE5\u4ECE\u903B\u8F91\u89D2\u5EA6\u5C3D\u53EF\u80FD\u907F\u514D\u8FD9\u7C7B\u5F02\u5E38\u7684\u53D1\u751F\u3002</p></blockquote><p>\u5E38\u89C1\u7684<strong>RuntimeException\u5F02\u5E38</strong>\uFF1A</p><ul><li>NullPointerException\uFF1A\u7A7A\u6307\u9488\u5F02\u5E38</li><li>ArithmeticException\uFF1A\u51FA\u73B0\u5F02\u5E38\u7684\u8FD0\u7B97\u6761\u4EF6\u65F6\uFF0C\u629B\u51FA\u6B64\u5F02\u5E38</li><li>IndexOutOfBoundsException\uFF1A\u6570\u7EC4\u7D22\u5F15\u8D8A\u754C\u5F02\u5E38</li><li>ClassNotFoundException\uFF1A\u627E\u4E0D\u5230\u7C7B\u5F02\u5E38</li><li>IllegalArgumentException(\u975E\u6CD5\u53C2\u6570\u5F02\u5E38)</li></ul><p>\u4EC0\u4E48\u662F<strong>CheckedException\uFF08\u53EF\u68C0\u67E5\u7684\u5F02\u5E38\uFF09</strong>\uFF1F</p><blockquote><p>\u4ECE\u7A0B\u5E8F\u8BED\u6CD5\u89D2\u5EA6\u8BB2\u662F\u5FC5\u987B\u8FDB\u884C\u5904\u7406\u7684\u5F02\u5E38\uFF0C\u5982\u679C\u4E0D\u5904\u7406\uFF0C\u7A0B\u5E8F\u5C31\u4E0D\u80FD\u7F16\u8BD1\u901A\u8FC7\u3002\u5982IOException\u3001SQLException\u7B49\u3002</p></blockquote><p><strong>\u5E38\u89C1\u7684 Checked Exception \u5F02\u5E38\uFF1A</strong></p><ul><li>IOException\uFF1A(\u64CD\u4F5C\u8F93\u5165\u6D41\u548C\u8F93\u51FA\u6D41\u65F6\u53EF\u80FD\u51FA\u73B0\u7684\u5F02\u5E38)</li><li>SQLException</li></ul><hr><p>\u4EE5\u4E0A\u5C31\u662F\u672C\u671F\u5206\u4EAB\u4E86\u3002</p>`,195),s=e("\u6700\u540E,\u6B22\u8FCE\u52A0\u5165\xA0"),m={href:"http://mp.weixin.qq.com/s?__biz=MzI1NDczNTAwMA==&mid=2247508640&idx=1&sn=b02fff3533f18b5d0bfbf714b127c140&chksm=e9c24557deb5cc41b1f2ecefdd23eb1370e261a47c23ad89b1d1428537fd1e8fe39762e707e1&scene=21#wechat_redirect",target:"_blank",rel:"noopener noreferrer"},b=e("\u9C7C\u76AE\u7684\u7F16\u7A0B\u77E5\u8BC6\u661F\u7403"),h=e("\uFF08\u70B9\u51FB\u4E86\u89E3\u8BE6\u60C5\uFF09\uFF0C\u548C 8200 \u591A\u540D\u5C0F\u4F19\u4F34\u4EEC\u4E00\u8D77\u4EA4\u6D41\u5B66\u4E60\uFF0C\u5411\u9C7C\u76AE\u548C\u5927\u5382\u540C\u5B66 1 \u5BF9 1 \u63D0\u95EE\u3001\u5E2E\u4F60\u5236\u5B9A\u5B66\u4E60\u8BA1\u5212\u4E0D\u8FF7\u832B\u3001\u8DDF\u7740\u9C7C\u76AE\u76F4\u64AD\u505A\u9879\u76EE\uFF08\u5F80\u671F\u9879\u76EE\u53EF\u65E0\u9650\u56DE\u770B\uFF09\u3001\u9886\u53D6\u9C7C\u76AE\u539F\u521B\u7F16\u7A0B\u5B66\u4E60/\u6C42\u804C\u8D44\u6599\u7B49\u3002"),g=l('<p><img src="https://mmbiz.qpic.cn/mmbiz_jpg/mngWTkJEOYJrQEPNiamWq4Z9AouO3XptkSsSJro9icBwc5icEmL6ficibOW2SwMHUOSmur5WsSQVw4oWNYx0EM7bgng/640?wx_fmt=jpeg" alt=""></p><p>\u5F80\u671F\u63A8\u8350</p><p>[</p><p>\u51E0\u4E2A\u5BF9\u7A0B\u5E8F\u5458\u7684\u8BEF\u89E3\uFF0C\u5BB3\u4EBA\u4E0D\u6D45\uFF01</p><p>](https://mp.weixin.qq.com/s?__biz=MzI1NDczNTAwMA==&amp;mid=2247509151&amp;idx=1&amp;sn=113246153900f18be1134697457f909c&amp;chksm=e9c24368deb5ca7e662c1bd7d2acf52df662c284ace43f2bc3bbb4a378da0340113d428fe6f4&amp;scene=21#wechat_redirect)</p><p>[</p><p>\u7F16\u7A0B\u5BFC\u822A\uFF0C\u706B\u4E86\uFF01</p><p>](https://mp.weixin.qq.com/s?__biz=MzI1NDczNTAwMA==&amp;mid=2247508640&amp;idx=1&amp;sn=b02fff3533f18b5d0bfbf714b127c140&amp;chksm=e9c24557deb5cc41b1f2ecefdd23eb1370e261a47c23ad89b1d1428537fd1e8fe39762e707e1&amp;scene=21#wechat_redirect)</p><p>[</p><p>Gitee 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index 00000000..cbd4c9e0
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new file mode 100644
index 00000000..c323bc0f
--- /dev/null
+++ b/dist/assets/weixin-shejmsnb.html.1f9c172b.js
@@ -0,0 +1,67 @@
+import{_ as e}from"./plugin-vue_export-helper.21dcd24c.js";import{o as n,c as i,e as s}from"./app.615e41d8.js";const l={},a=s(`<p>\u65F6\u4E0D\u65F6\u5C31\u6709\u8BFB\u8005\u79C1\u4FE1\u6211\uFF0C\u201C\u4E8C\u54E5\uFF0C<strong>\u6211\u7684\u4EE3\u7801\u5199\u5F97\u5F88\u70C2\uFF0C\u8BE5\u600E\u4E48\u529E\u5440</strong>\uFF1F\u201D</p><p>\u5199\u4EE3\u7801\u786E\u5B9E\u662F\u95E8\u624B\u827A\u6D3B\uFF0C\u8FD9\u662F\u6211\u4EEC\u7A0B\u5E8F\u5458\u4E0D\u5F97\u4E0D\u627F\u8BA4\u7684\u4E00\u4E2A\u4E8B\u5B9E\uFF0C\u6BD5\u7ADF\u8981\u7528\u624B\u6307\u5934\u6765\u6572\u554A\uFF01\u4E0D\u662F\u624B\u827A\u6D3B\u662F\u5565\uFF08\u7B11\uFF09</p><p>\u7B80\u5355\u6765\u5206\u6790\u4E00\u4E0B\u4EE3\u7801\u5199\u5F97\u70C2\u7684\u539F\u56E0\u54C8\u3002\u5176\u4E00\uFF0C\u53EF\u80FD\u662F\u521A\u5165\u95E8\uFF0C\u4EE3\u7801\u5199\u5F97\u5C11\uFF0C\u5982\u679C\u6211\u4EEC\u6EE1\u6253\u6EE1\u7B97\u53EA\u5199\u8FC7\u4E00\u4E24\u5343\u884C\u4EE3\u7801\uFF0C\u662F\u4E0D\u53EF\u80FD\u5199\u51FA\u591A\u4F18\u96C5\u7684\u4EE3\u7801\u7684\u3002\u5176\u4E8C\uFF0C\u53EF\u80FD\u6211\u4EEC\u4E0D\u61C2\u8BBE\u8BA1\u6A21\u5F0F\uFF0C\u8BBE\u8BA1\u6A21\u5F0F\u662F\u8F6F\u4EF6\u8BBE\u8BA1\u4E2D\u5E38\u89C1\u95EE\u9898\u7684\u5178\u578B\u89E3\u51B3\u65B9\u6848\uFF0C\u5B83\u4EEC\u5C31\u50CF\u80FD\u6839\u636E\u9700\u6C42\u8FDB\u884C\u8C03\u6574\u7684\u9884\u5236\u84DD\u56FE\uFF0C \u53EF\u7528\u4E8E\u89E3\u51B3\u4EE3\u7801\u4E2D\u53CD\u590D\u51FA\u73B0\u7684\u8BBE\u8BA1\u95EE\u9898\uFF0C\u5982\u679C\u4E0D\u61C2\u8BBE\u8BA1\u6A21\u5F0F\u7684\u8BDD\uFF0C\u9047\u5230\u8FD9\u4E9B\u95EE\u9898\u5C31\u53EA\u80FD\u6293\u778E\u4E86\u3002</p><p>\u8FD9\u4E48\u8BF4\u5427\uFF0C<strong>\u8BBE\u8BA1\u6A21\u5F0F\u73A9\u5F97\u7089\u706B\u7EAF\u9752\uFF0C\u5199\u51FA\u7684\u4EE3\u7801\u5C31\u66F4\u4F18\u96C5\uFF0C\u9605\u8BFB\u8D77\u6765\u4E5F\u4F1A\u66F4\u52A0\u8212\u670D\uFF0C\u53EF\u7EF4\u62A4\u6027\u3001\u53EF\u6269\u5C55\u6027\u5C31\u66F4\u5F3A</strong>\u3002</p><p>\u8BF4\u5230\u8FD9\uFF0C\u6211\u786E\u4FE1\u5927\u5BB6\u5DF2\u7ECF\u4E86\u89E3\u8BBE\u8BA1\u6A21\u5F0F\u7684\u91CD\u8981\u6027\u4E86\uFF01<strong>\u8FD9\u91CC\u7ED9\u5927\u5BB6\u63A8\u8350\u4E00\u4EFD\u5168\u7F51\u9605\u8BFB\u8D85\u8FC7 500 \u4E07\u6B21\u7684\u8BBE\u8BA1\u6A21\u5F0F PDF\uFF0C\u6301\u7EED\u9738\u699C\xA0GitHub Trending\u3002</strong></p><p><strong>\u5FAE\u4FE1\u641C\u7D22\u300C<strong>\u6C89\u9ED8\u738B\u4E8C</strong>\u300D\u53D1\u9001\u300C<strong>10</strong>\u300D\u5173\u952E\u5B57\u9886\u53D6\u5373\u53EF\u9886\u53D6\uFF0C\u4E5F\u53EF\u4EE5\u626B\u63CF\u4E0B\u9762\u7684\u4E8C\u7EF4\u7801\u5173\u6CE8\u540E\u53D1\u9001</strong>\u300C<strong>10</strong>\u300D\u5173\u952E\u5B57**\u3002**</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/weixin-shejmsnb-79a353da-80da-4779-ae59-0f3183f1a14c.jpg" alt=""></p><p>\u518D\u6765\u63A8\u8350\u4E00\u4E2A\u7F51\u7AD9\uFF1ARefactoring Guru\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/weixin-shejmsnb-c582a192-0373-45b2-99de-69e688d31baa.jpg" alt="">\u7F51\u5740\u5982\u4E0B\u6240\u793A\uFF1A</p><blockquote><p>https://refactoring.guru</p></blockquote><p><strong>\u8FD9\u867D\u7136\u662F\u4E00\u4E2A\u56FD\u5916\u7684\u7F51\u7AD9\uFF0C\u5374\u795E\u5947\u7684\u5B9E\u73B0\u4E86\u4E2D\u6587\u5316\u56FD\u9645\u5316\uFF0C\u7231\u4E86\u7231\u4E86\uFF0C\u65E0\u60C5\u5730\u7231\u4E86</strong>\u3002\u636E\u4F5C\u8005\u8BF4\uFF0C\u4ED6\u5EFA\u7AD9\u7684\u521D\u8877\u5C31\u662F\u4E3A\u4E86\u5E2E\u52A9\u6211\u4EEC\u7A0B\u5E8F\u5458\uFF0C\u5FEB\u901F\u5730\u638C\u63E1\u8BBE\u8BA1\u6A21\u5F0F\uFF0C\u4F46\u628A\u7F51\u7AD9\u505A\u5230\u8FD9\u79CD\u7528\u5FC3\u7684\u7A0B\u5EA6\uFF0C\u6211\u53EA\u80FD\u60C5\u4E0D\u81EA\u7981\u5730\u70B9\u8D5E\u4E86\uFF01</p><p>\u6765\u770B\u4E00\u4E0B\u8BBE\u8BA1\u6A21\u5F0F\u7684\u76EE\u5F55\u5427\uFF08\u4E0B\u56FE\u4E2D\u53EA\u5C55\u73B0\u4E86\u521B\u5EFA\u578B\u6A21\u5F0F\u548C\u7ED3\u6784\u578B\u6A21\u5F0F\u4E2D\u7684\u4E00\u90E8\u5206\uFF0C\u8FD8\u6709\u884C\u4E3A\u6A21\u5F0F\uFF09\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/weixin-shejmsnb-e28938e4-f117-4afe-966b-e44d0ec022a0.jpg" alt="">\u6BCF\u4E2A\u6A21\u5F0F\u90FD\u4F1A\u5BF9\u5E94\u4E00\u7BC7\u56FE\u6587\u5E76\u8302\u7684\u6587\u7AE0\uFF0C\u9605\u8BFB\u8D77\u6765\u5C31\u597D\u50CF\u5728\u8BFB\u7ED8\u672C\u4E00\u6837\uFF0C\u751F\u52A8\u6709\u8DA3\uFF0C\u4EE4\u4EBA\u5370\u8C61\u6DF1\u523B\uFF0C\u5B66\u8D77\u6765\u5C31\u6CA1\u6709\u534A\u70B9\u67AF\u71E5\u7684\u611F\u89C9\u3002\u6765\u770B\u4E00\u4E0B\u5DE5\u5382\u65B9\u6CD5\u6A21\u5F0F\u7684\u4E00\u90E8\u5206\u5185\u5BB9\u622A\u56FE\uFF0C\u8FD9\u56FE\u7247\u7684\u8D28\u91CF\uFF0C\u786E\u5B9E\u9AD8\u554A\uFF0C\u4E0D\u670D\u4E0D\u884C\uFF01</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/weixin-shejmsnb-6ab000de-34e7-44f2-9b06-b9d92cc0c043.jpg" alt=""></p><p>\u914D\u5957\u7684\u4EE3\u7801\u793A\u4F8B\u4E5F\u975E\u5E38\u5B8C\u6574\uFF0C\u6765\u770B\u4E00\u4E0B Java \u7248\u7684\uFF1A</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>public class WindowsButton implements Button {  
+
+    JPanel panel = new JPanel();  
+
+    JFrame frame = new JFrame();  
+
+    JButton button;  
+
+  
+
+    public void render() {  
+
+        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);  
+
+        JLabel label = new JLabel(&quot;Hello World!&quot;);  
+
+        label.setOpaque(true);  
+
+        label.setBackground(new Color(235, 233, 126));  
+
+        label.setFont(new Font(&quot;Dialog&quot;, Font.BOLD, 44));  
+
+        label.setHorizontalAlignment(SwingConstants.CENTER);  
+
+        panel.setLayout(new FlowLayout(FlowLayout.CENTER));  
+
+        frame.getContentPane().add(panel);  
+
+        panel.add(label);  
+
+        onClick();  
+
+        panel.add(button);  
+
+  
+
+        frame.setSize(320, 200);  
+
+        frame.setVisible(true);  
+
+        onClick();  
+
+    }  
+
+  
+
+    public void onClick() {  
+
+        button = new JButton(&quot;Exit&quot;);  
+
+        button.addActionListener(new ActionListener() {  
+
+            public void actionPerformed(ActionEvent e) {  
+
+                frame.setVisible(false);  
+
+                System.exit(0);  
+
+            }  
+
+        });  
+
+    }  
+
+}  
+
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>\u5F53\u7136\u4E86\uFF0C\u4EE3\u7801\u793A\u4F8B\u4E0D\u53EA\u6709 Java \u7248\u7684\uFF0C\u8FD8\u6709 C#\u3001C++\u3001Python\u3001Go \u7B49 8 \u79CD\u5E38\u89C1\u7684\u7F16\u7A0B\u8BED\u8A00\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/weixin-shejmsnb-3a219b1c-be2b-4586-b7d3-5c0ea23975b5.jpg" alt="">\u8FD9\u79CD<strong>\u56FE\u6587\u5E76\u8302 + \u4EE3\u7801\u793A\u4F8B</strong>\u7684\u5B66\u4E60\u65B9\u5F0F\uFF0C\u6781\u5927\u5730\u52A0\u6DF1\u4E86\u6211\u4EEC\u7A0B\u5E8F\u5458\u5BF9\u77E5\u8BC6\u7684\u5438\u6536\u3002\u8FD8\u6709\u4EC0\u4E48\u8D5E\u7F8E\u7684\u8BCD\u8BED\uFF1F\u5B66\u5BCC\u4E94\u8F66\u7684\u6211\u7ADF\u7136\u6709\u70B9\u8BCD\u7A77\u4E86\u3002\u603B\u4E4B\uFF0C\u5982\u679C\u5927\u5BB6\u4E5F\u60F3\u5B66\u597D\u8BBE\u8BA1\u6A21\u5F0F\uFF0C\u8D76\u5FEB\u70B9\u5427\uFF01</p><p>\u79BB\u7EBF\u7248\u7684 PDF \u6211\u4E5F\u8D21\u732E\u51FA\u6765\u4E86\uFF0C\u622A\u53D6\u4E00\u90E8\u5206\u5185\u5BB9\u4F9B\u5927\u5BB6\u9884\u89C8\u4E0B\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/weixin-shejmsnb-92309f22-ac2d-4cef-81cb-9f83bf9380d6.jpg" alt="">\u91CC\u9762\u6709\u4E0D\u5C11\u56FE\u6587\u53C2\u7167\u4E86 Refactoring Guru \u8FD9\u4E2A\u7F51\u7AD9\uFF0C\u4F46\u4E5F\u52A0\u5165\u4E86\u4F5C\u8005\u81EA\u5DF1\u7684\u601D\u8003\u548C\u7406\u89E3\uFF0C\u8BFB\u8D77\u6765\u4E5F\u66F4\u63A5\u5730\u6C14\u4E00\u70B9\u3002\u6309\u7167\u4F5C\u8005\u8BF4\u7684\uFF1A</p><blockquote><p>\u5F88\u9AD8\u5174\u4F60\u80FD\u62FF\u5230\u8FD9\u672C\u4E66\uFF0C\u5982\u679C\u4F60\u80FD\u575A\u6301\u770B\u5B8C\u5E76\u6309\u7167\u4E66\u4E2D\u7684\uF9B5\u2F26\u8FDB\uFA08\u5B9E\u8DF5\uFF0C\u90A3\u4E48\u5728\u7F16\u7A0B\u5F00\u53D1\u7684\u4E16\u754C\uF9E9\uFF0C\u5C31\u2F1C\u591A\u4E86\uF9BA\u2F00\u4E2A\u53EF\u4EE5\u5199\u51FA\u826F\u597D\u4EE3\u7801\u7684\u2F08\uFF0C\u540C\u65F6\u4E5F\u4E3A\u67B6\u6784\u5E08\u57F9\u517B\u50A8\u5907\u4E86\uF9BA\u2F00\u4E2A\u2F08\u624D\u3002</p></blockquote><p>\u5982\u679C\u5927\u5BB6\u5BF9\u8FD9\u4EFD PDF \u611F\u5174\u8DA3\u7684\u8BDD\uFF0C\u53EF\u4EE5<strong>\u5FAE\u4FE1\u641C\u7D22\u300C<strong>\u6C89\u9ED8\u738B\u4E8C</strong>\u300D\u53D1\u9001</strong>\u5173\u952E\u5B57\u300C<strong>\u8BBE\u8BA1\u6A21\u5F0F</strong>\u300D\u83B7\u53D6\u4E0B\u8F7D\u94FE\u63A5\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/weixin-shejmsnb-79a353da-80da-4779-ae59-0f3183f1a14c.jpg" alt=""></p><p>\u4E5F\u53EF\u4EE5\u626B\u63CF\u4E0A\u9762\u7684\u4E8C\u7EF4\u7801\u5173\u6CE8\u540E\u53D1\u9001 \u300C<strong>10</strong> \u300D\u83B7\u53D6\u4E0B\u8F7D\u94FE\u63A5</p><p><strong>\u4E00\u8D77\u6210\u4E3A\u725B\u903C\u7684\u7A0B\u5E8F\u5458\uFF01</strong></p>`,25),t=[a];function r(d,v){return n(),i("div",null,t)}var o=e(l,[["render",r],["__file","weixin-shejmsnb.html.vue"]]);export{o as default};
diff --git a/dist/assets/weixin-shejmsnb.html.5a6a099f.js b/dist/assets/weixin-shejmsnb.html.5a6a099f.js
new file mode 100644
index 00000000..6076b06b
--- /dev/null
+++ b/dist/assets/weixin-shejmsnb.html.5a6a099f.js
@@ -0,0 +1 @@
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new file mode 100644
index 00000000..e9fe43fd
--- /dev/null
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new file mode 100644
index 00000000..1438c864
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+++ b/dist/assets/weixin-shenrjcjavabfbchwjdhl.html.ca182283.js
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diff --git a/dist/assets/weixin-xinllgjszjszzpojozsyjbsjlxyhjfyll.html.5d76cb3c.js b/dist/assets/weixin-xinllgjszjszzpojozsyjbsjlxyhjfyll.html.b7b8ec57.js
similarity index 98%
rename from dist/assets/weixin-xinllgjszjszzpojozsyjbsjlxyhjfyll.html.5d76cb3c.js
rename to dist/assets/weixin-xinllgjszjszzpojozsyjbsjlxyhjfyll.html.b7b8ec57.js
index 34847131..f6ac7915 100644
--- a/dist/assets/weixin-xinllgjszjszzpojozsyjbsjlxyhjfyll.html.5d76cb3c.js
+++ b/dist/assets/weixin-xinllgjszjszzpojozsyjbsjlxyhjfyll.html.b7b8ec57.js
@@ -1,4 +1,4 @@
-import{_ as l}from"./plugin-vue_export-helper.21dcd24c.js";import{r as d,o as a,c,a as e,b as i,e as r,d as s}from"./app.a0271b9c.js";const t={},o=r(`<p>\u5927\u5BB6\u597D\uFF0C\u6211\u662F\u7A0B\u5E8F\u6C6A</p><p>\u7A0B\u5E8F\u5458\u7F16\u7801\u65F6\u4E00\u4E9B\u4E0D\u7ECF\u610F\u7684\u7EC6\u8282\u53EF\u80FD\u5BFC\u81F4\u4E00\u4E9B\u5F88\u96BE\u5BDF\u89C9\u7684BUG\uFF0C\u4E0A\u751F\u4EA7\u8FD0\u884C\u4E00\u6BB5\u65F6\u95F4\u540E\u624D\u53D1\u73B0\uFF0C\u771F\u7684\u5F88\u5934\u75BC\u3002</p><p>\u5728\u300A\u963F\u91CC\u5DF4\u5DF4Java\u5F00\u53D1\u624B\u518C\u300B\u4E2D\uFF0C\u5BF9\u4E8EPOJO\u4E2D\u5982\u4F55\u9009\u62E9\u53D8\u91CF\u7684\u7C7B\u578B\u4EE5\u53CA RPC \u63A5\u53E3\u4E2D\u7684\u8FD4\u56DE\u503C\u7C7B\u578B\u4E5F\u6709\u7740\u4E00\u4E9B\u89C4\u5B9A\uFF1A</p><p><img src="https://mmbiz.qpic.cn/mmbiz_jpg/6fuT3emWI5IibzibgbpjKvoJTZebia3RKDOd3L0BMFtTBSsDmcbUPh8VAlQh2icxdcqbMybEhnNoGS24SNLUWBx71Q/640?wx_fmt=jpeg" alt=""></p><p>\u8FD9\u91CC\u5F3A\u5236\u8981\u6C42\u4F7F\u7528\u5305\u88C5\u7C7B\u578B\uFF0C\u539F\u56E0\u662F\u4EC0\u4E48\u5462\uFF1F</p><p>\u6211\u4EEC\u6765\u770B\u4E00\u6BB5\u7B80\u5355\u7684\u4EE3\u7801</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>/**  
+import{_ as l}from"./plugin-vue_export-helper.21dcd24c.js";import{r as d,o as a,c,a as e,b as i,e as r,d as s}from"./app.615e41d8.js";const t={},o=r(`<p>\u5927\u5BB6\u597D\uFF0C\u6211\u662F\u7A0B\u5E8F\u6C6A</p><p>\u7A0B\u5E8F\u5458\u7F16\u7801\u65F6\u4E00\u4E9B\u4E0D\u7ECF\u610F\u7684\u7EC6\u8282\u53EF\u80FD\u5BFC\u81F4\u4E00\u4E9B\u5F88\u96BE\u5BDF\u89C9\u7684BUG\uFF0C\u4E0A\u751F\u4EA7\u8FD0\u884C\u4E00\u6BB5\u65F6\u95F4\u540E\u624D\u53D1\u73B0\uFF0C\u771F\u7684\u5F88\u5934\u75BC\u3002</p><p>\u5728\u300A\u963F\u91CC\u5DF4\u5DF4Java\u5F00\u53D1\u624B\u518C\u300B\u4E2D\uFF0C\u5BF9\u4E8EPOJO\u4E2D\u5982\u4F55\u9009\u62E9\u53D8\u91CF\u7684\u7C7B\u578B\u4EE5\u53CA RPC \u63A5\u53E3\u4E2D\u7684\u8FD4\u56DE\u503C\u7C7B\u578B\u4E5F\u6709\u7740\u4E00\u4E9B\u89C4\u5B9A\uFF1A</p><p><img src="https://mmbiz.qpic.cn/mmbiz_jpg/6fuT3emWI5IibzibgbpjKvoJTZebia3RKDOd3L0BMFtTBSsDmcbUPh8VAlQh2icxdcqbMybEhnNoGS24SNLUWBx71Q/640?wx_fmt=jpeg" alt=""></p><p>\u8FD9\u91CC\u5F3A\u5236\u8981\u6C42\u4F7F\u7528\u5305\u88C5\u7C7B\u578B\uFF0C\u539F\u56E0\u662F\u4EC0\u4E48\u5462\uFF1F</p><p>\u6211\u4EEC\u6765\u770B\u4E00\u6BB5\u7B80\u5355\u7684\u4EE3\u7801</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>/**  
 
  * @author Hollis  
 
diff --git a/dist/assets/weixin-zaixsfdnavicatzkkydsjkglgjjmgxk.html.ad8c7107.js b/dist/assets/weixin-zaixsfdnavicatzkkydsjkglgjjmgxk.html.ad8c7107.js
new file mode 100644
index 00000000..cdf168c7
--- /dev/null
+++ b/dist/assets/weixin-zaixsfdnavicatzkkydsjkglgjjmgxk.html.ad8c7107.js
@@ -0,0 +1 @@
+const e={key:"v-84fc24ae",path:"/nice-article/weixin-zaixsfdnavicatzkkydsjkglgjjmgxk.html",title:"\u518D\u89C1\u6536\u8D39\u7684Navicat\uFF01\u8FD9\u6B3E\u5F00\u6E90\u7684\u6570\u636E\u5E93\u7BA1\u7406\u5DE5\u5177\u754C\u9762\u66F4\u70AB\u9177\uFF01",lang:"zh-CN",frontmatter:{title:"\u518D\u89C1\u6536\u8D39\u7684Navicat\uFF01\u8FD9\u6B3E\u5F00\u6E90\u7684\u6570\u636E\u5E93\u7BA1\u7406\u5DE5\u5177\u754C\u9762\u66F4\u70AB\u9177\uFF01",shortTitle:"\u518D\u89C1\u6536\u8D39\u7684Navicat\uFF01\u8FD9\u6B3E\u5F00\u6E90\u7684\u6570\u636E\u5E93\u7BA1\u7406\u5DE5\u5177\u754C\u9762\u66F4\u70AB\u9177\uFF01",author:"\u68A6\u60F3de\u661F\u7A7A",category:["\u4F18\u8D28\u6587\u7AE0"],summary:'" \u6570\u636E\u5E93\u7BA1\u7406\u5DE5\u5177\uFF0C\u662F\u540E\u7AEF\u7A0B\u5E8F\u5458\u4F7F\u7528\u9891\u7387\u975E\u5E38\u9AD8\u7684\u7684\u5DE5\u5177\u3002Navicat\u3001DataGrip\u867D\u7136\u5F88\u597D\u7528\uFF0C\u4F46\u90FD\u662F\u6536\u8D39\u7684\u3002\u6700\u8FD1\u5728\u901BGithub\u7684\u65F6\u5019\uFF0C\u65E0\u610F\u95F4\u53D1\u73B0\u4E86\u4E00\u6B3E\u5F00\u6E90\u7684\u6570\u636E\u5E93\u7BA1\u7406\u5DE5\u5177Beekeeper Studio\uFF0C\u754C\u9762\u975E\u5E38\u70AB\u9177\u63A8\u8350\u7ED9\u5927\u5BB6\uFF01" Beekeeper Studio \u7B80\u4ECB ------------------- Beekeeper Studio \u662F\u4E00\u6B3E',head:[["meta",{property:"og:url",content:"https://tobebetterjavaer.com/nice-article/weixin-zaixsfdnavicatzkkydsjkglgjjmgxk.html"}],["meta",{property:"og:site_name",content:"Java \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF"}],["meta",{property:"og:title",content:"\u518D\u89C1\u6536\u8D39\u7684Navicat\uFF01\u8FD9\u6B3E\u5F00\u6E90\u7684\u6570\u636E\u5E93\u7BA1\u7406\u5DE5\u5177\u754C\u9762\u66F4\u70AB\u9177\uFF01"}],["meta",{property:"og:type",content:"article"}],["meta",{property:"og:updated_time",content:"2022-06-10T09:58:21.000Z"}],["meta",{property:"og:locale",content:"zh-CN"}],["meta",{property:"article:author",content:"\u68A6\u60F3de\u661F\u7A7A"}],["meta",{property:"article:modified_time",content:"2022-06-10T09:58:21.000Z"}]]},excerpt:"",headers:[{level:2,title:"Beekeeper Studio \u7B80\u4ECB",slug:"beekeeper-studio-\u7B80\u4ECB",children:[]},{level:2,title:"\u4E0B\u8F7D\u5B89\u88C5",slug:"\u4E0B\u8F7D\u5B89\u88C5",children:[]},{level:2,title:"\u4F7F\u7528",slug:"\u4F7F\u7528",children:[{level:3,title:"\u5916\u89C2\u8BBE\u7F6E",slug:"\u5916\u89C2\u8BBE\u7F6E",children:[]},{level:3,title:"\u521B\u5EFA\u6570\u636E\u6E90",slug:"\u521B\u5EFA\u6570\u636E\u6E90",children:[]},{level:3,title:"\u7BA1\u7406\u8868\u64CD\u4F5C",slug:"\u7BA1\u7406\u8868\u64CD\u4F5C",children:[]},{level:3,title:"SQL\u64CD\u4F5C",slug:"sql\u64CD\u4F5C",children:[]}]},{level:2,title:"\u603B\u7ED3",slug:"\u603B\u7ED3",children:[]},{level:2,title:"\u9879\u76EE\u5730\u5740",slug:"\u9879\u76EE\u5730\u5740",children:[]},{level:2,title:"\u63A8\u8350\u9605\u8BFB",slug:"\u63A8\u8350\u9605\u8BFB",children:[]}],git:{createdTime:1654855101e3,updatedTime:1654855101e3,contributors:[{name:"itwanger",email:"www.qing_gee@163.com",commits:1}]},readingTime:{minutes:4.03,words:1208},filePathRelative:"nice-article/weixin-zaixsfdnavicatzkkydsjkglgjjmgxk.md"};export{e as data};
diff --git a/dist/assets/weixin-zaixsfdnavicatzkkydsjkglgjjmgxk.html.bcbd11eb.js b/dist/assets/weixin-zaixsfdnavicatzkkydsjkglgjjmgxk.html.bcbd11eb.js
new file mode 100644
index 00000000..82c37501
--- /dev/null
+++ b/dist/assets/weixin-zaixsfdnavicatzkkydsjkglgjjmgxk.html.bcbd11eb.js
@@ -0,0 +1 @@
+import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{r as s,o as p,c,a as e,b as t,e as r,d as a}from"./app.615e41d8.js";const d={},m=r('<blockquote><p>\u6570\u636E\u5E93\u7BA1\u7406\u5DE5\u5177\uFF0C\u662F\u540E\u7AEF\u7A0B\u5E8F\u5458\u4F7F\u7528\u9891\u7387\u975E\u5E38\u9AD8\u7684\u7684\u5DE5\u5177\u3002Navicat\u3001DataGrip\u867D\u7136\u5F88\u597D\u7528\uFF0C\u4F46\u90FD\u662F\u6536\u8D39\u7684\u3002\u6700\u8FD1\u5728\u901BGithub\u7684\u65F6\u5019\uFF0C\u65E0\u610F\u95F4\u53D1\u73B0\u4E86\u4E00\u6B3E\u5F00\u6E90\u7684\u6570\u636E\u5E93\u7BA1\u7406\u5DE5\u5177<code>Beekeeper Studio</code>\uFF0C\u754C\u9762\u975E\u5E38\u70AB\u9177\u63A8\u8350\u7ED9\u5927\u5BB6\uFF01</p></blockquote><h2 id="beekeeper-studio-\u7B80\u4ECB" tabindex="-1"><a class="header-anchor" href="#beekeeper-studio-\u7B80\u4ECB" aria-hidden="true">#</a> Beekeeper Studio \u7B80\u4ECB</h2><p>Beekeeper Studio \u662F\u4E00\u6B3E\u8DE8\u5E73\u53F0\u7684\u6570\u636E\u5E93\u7BA1\u7406\u5DE5\u5177\uFF0C\u652F\u6301Linux\u3001Mac\u3001\xA0Windows\u7CFB\u7EDF\uFF0C\u76EE\u524D\u5728Github\u4E0A\u5DF2\u6709<code>9.8K+Star</code>\u3002</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/CKvMdchsUwkm2gfiaJAsqpn0skbVhpgQT6YxfgfCwyIarHznK0BazDa5lLvHtibLToibS0icLfFDicCTNHdqz1UuHFA/640?wx_fmt=png" alt=""></p><p>\u4E00\u770B\u5230\u5B83\u7684\u6DF1\u8272\u6A21\u5F0F\u4E3B\u9898\u65F6\uFF0C\u6211\u5C31\u611F\u89C9\u5B83\u7684\u754C\u9762\u5F88\u70AB\u9177\uFF0C\u975E\u5E38\u7B26\u5408\u7A0B\u5E8F\u5458\u7684\u5BA1\u7F8E\uFF0C\u5927\u5BB6\u53EF\u4EE5\u770B\u4E0B\u3002</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/CKvMdchsUwkm2gfiaJAsqpn0skbVhpgQTuEsdn8kbFbIunWib1ibJQyoasnA40AmDJJNWHJ0xaao0wNmrhrrXXia2g/640?wx_fmt=png" alt=""></p><h2 id="\u4E0B\u8F7D\u5B89\u88C5" tabindex="-1"><a class="header-anchor" href="#\u4E0B\u8F7D\u5B89\u88C5" aria-hidden="true">#</a> \u4E0B\u8F7D\u5B89\u88C5</h2><p>Beekeeper Studio \u6709\u514D\u8D39\u7684\u793E\u533A\u7248\u53EF\u4EE5\u4F7F\u7528\uFF0C\u4E0D\u60F3\u5B89\u88C5\u7684\u5C0F\u4F19\u4F34\u53EF\u4EE5\u4E0B\u8F7D\u4FBF\u643A\u7248\uFF0C\u4E0B\u8F7D\u5730\u5740\uFF1Ahttps://www.beekeeperstudio.io/get</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/CKvMdchsUwkm2gfiaJAsqpn0skbVhpgQTvzPwBAOfILcPlGJBTxomxA4IBRFS8HjmibcuenyotrV17iaKeSGZMu0g/640?wx_fmt=png" alt=""></p><p>\u4E0B\u8F7D\u5B8C\u6210\u540E\u53CC\u51FB<code>.exe</code>\u6587\u4EF6\u5373\u53EF\u8FD0\u884C\uFF0C\u8FD0\u884C\u6210\u529F\u540E\u6548\u679C\u5982\u4E0B\uFF0C\u9ED8\u8BA4\u662F\u6D45\u8272\u4E3B\u9898\u3002</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/CKvMdchsUwkm2gfiaJAsqpn0skbVhpgQTaCLsAvvdlkbf0P0wanctLeCyS5VXqGkIhaeOHMI4ekuvj30IMcoF1g/640?wx_fmt=png" alt=""></p><h2 id="\u4F7F\u7528" tabindex="-1"><a class="header-anchor" href="#\u4F7F\u7528" aria-hidden="true">#</a> \u4F7F\u7528</h2><blockquote><p>\u4E0B\u9762\u6211\u4EEC\u6765\u4F53\u9A8C\u4E0BBeekeeper Studio\uFF0C\u770B\u770B\u5B83\u662F\u4E0D\u662F\u591F\u597D\u7528\uFF01</p></blockquote><h3 id="\u5916\u89C2\u8BBE\u7F6E" tabindex="-1"><a class="header-anchor" href="#\u5916\u89C2\u8BBE\u7F6E" aria-hidden="true">#</a> \u5916\u89C2\u8BBE\u7F6E</h3><p>\u6211\u4EEC\u53EF\u4EE5\u901A\u8FC7\u9876\u90E8\u7684<code>View</code>\u83DC\u5355\u6309\u94AE\u8FDB\u884C\u5B57\u4F53\u5927\u5C0F\u548C\u4E3B\u9898\u8BBE\u7F6E\uFF0C\u6211\u4EEC\u628A\u5B83\u5207\u6362\u5230\u66F4\u70AB\u9177\u7684\u6DF1\u8272\u4E3B\u9898\u3002</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/CKvMdchsUwkm2gfiaJAsqpn0skbVhpgQTEWTCkFaaUO3XwpKCdTfQ3HdzttPVK8Jn32Wc09cYlkh9m2kFE23Q1g/640?wx_fmt=png" alt=""></p><h3 id="\u521B\u5EFA\u6570\u636E\u6E90" tabindex="-1"><a class="header-anchor" href="#\u521B\u5EFA\u6570\u636E\u6E90" aria-hidden="true">#</a> \u521B\u5EFA\u6570\u636E\u6E90</h3><ul><li>\u6211\u4EEC\u53EF\u4EE5\u901A\u8FC7\u9876\u90E8\u7684<code>New Connection</code>\u6309\u94AE\u6765\u521B\u5EFA\u6570\u636E\u6E90\uFF0C\u8FD9\u91CC\u6211\u4EEC\u53EF\u4EE5\u53D1\u73B0Beekeeper Studio\u4EC5\u652F\u6301\u5E38\u7528\u7684\u51E0\u79CD\u5173\u7CFB\u578B\u6570\u636E\u5E93\uFF1B</li></ul><p><img src="https://mmbiz.qpic.cn/mmbiz_png/CKvMdchsUwkm2gfiaJAsqpn0skbVhpgQTadK2JWprViaP3YribzustJsOMicKAGdnj9WAytEthrsj6F4HQznicVLibqA/640?wx_fmt=png" alt=""></p><ul><li>\u8FD9\u91CC\u6211\u4EEC\u521B\u5EFA\u4E00\u4E2AMySQL\u8FDE\u63A5\uFF0C\u8F93\u5165\u8FDE\u63A5\u4FE1\u606F\uFF0C\u7136\u540E\u70B9\u51FB\u4FDD\u5B58\u6309\u94AE\u5373\u53EF\uFF1B</li></ul><p><img src="https://mmbiz.qpic.cn/mmbiz_png/CKvMdchsUwkm2gfiaJAsqpn0skbVhpgQT9Tr32dribnE2ib4VCmNjTm7wL1x5Oljt0a3pZibpcSscDDwmXicGX75qkg/640?wx_fmt=png" alt=""></p><ul><li>\u518D\u70B9\u51FB<code>Connect</code>\u6309\u94AE\uFF0C\u8FDE\u63A5\u540E\u9009\u62E9\u597D\u6570\u636E\u5E93\u5C31\u53EF\u4EE5\u5F00\u59CB\u7BA1\u7406\u4E86\uFF0C\u64CD\u4F5C\u5FEB\u6377\u952E\u5DF2\u7ECF\u5728\u4E0B\u65B9\u63D0\u793A\u4E86\u3002</li></ul><p><img src="https://mmbiz.qpic.cn/mmbiz_png/CKvMdchsUwkm2gfiaJAsqpn0skbVhpgQTXnK2BFWkSvCl01mrbdusHp2qAJx6GNtNKzoLBloRky3x3Yy3J4lYpQ/640?wx_fmt=png" alt=""></p><h3 id="\u7BA1\u7406\u8868\u64CD\u4F5C" tabindex="-1"><a class="header-anchor" href="#\u7BA1\u7406\u8868\u64CD\u4F5C" aria-hidden="true">#</a> \u7BA1\u7406\u8868\u64CD\u4F5C</h3><ul><li>\u53F3\u952E\u8868\u540D\u70B9\u51FB\u83DC\u5355\u53EF\u4EE5\u9009\u62E9\u67E5\u770B\u8868\u4E2D\u7684\u6570\u636E\uFF1B</li></ul><p><img src="https://mmbiz.qpic.cn/mmbiz_png/CKvMdchsUwkm2gfiaJAsqpn0skbVhpgQTyHiaAl2aBAyvH8s9XajJoH2fxl3k3nGeksV5HnmVN8zuZ7MSaRmv3Ow/640?wx_fmt=png" alt=""></p><ul><li>\u652F\u6301\u5FEB\u6377\u67E5\u8BE2\u5404\u4E2A\u5B57\u6BB5\u76F8\u5173\u6570\u636E\uFF0C\u8FD9\u529F\u80FD\u8FD8\u662F\u633A\u5B9E\u7528\u7684\uFF1B</li></ul><p><img src="https://mmbiz.qpic.cn/mmbiz_png/CKvMdchsUwkm2gfiaJAsqpn0skbVhpgQTAhrgqLC0QlSlIRu0echHXziaRibzDaX4ONKsjm57zaY8HK7LH97EdHew/640?wx_fmt=png" alt=""></p><ul><li>\u53F3\u952E\u83DC\u5355\u8FD8\u53EF\u4EE5\u67E5\u770B\u8868\u7ED3\u6784\uFF0C\u7BA1\u7406\u5B57\u6BB5\u8FD8\u662F\u633A\u65B9\u4FBF\u7684\uFF1B</li></ul><p><img src="https://mmbiz.qpic.cn/mmbiz_png/CKvMdchsUwkm2gfiaJAsqpn0skbVhpgQTPfohLdFpuT7dcsBuXb3jPnHooiamUs3oTDp4mkqNFXDrEZf9HVHiaKjg/640?wx_fmt=png" alt=""></p><ul><li>\u53F3\u952E\u83DC\u5355\u8FD8\u53EF\u4EE5\u67E5\u770B\u8868\u7684\u521B\u5EFA\u8BED\u53E5\uFF0C\u8FD9SQL\u4E3B\u9898\u6837\u5F0F\uFF0C\u786E\u5B9E\u633A\u6F02\u4EAE\u7684\uFF1B</li></ul><p><img src="https://mmbiz.qpic.cn/mmbiz_png/CKvMdchsUwkm2gfiaJAsqpn0skbVhpgQTuEsdn8kbFbIunWib1ibJQyoasnA40AmDJJNWHJ0xaao0wNmrhrrXXia2g/640?wx_fmt=png" alt=""></p><ul><li>\u53F3\u952E\u83DC\u5355\u8FD8\u652F\u6301\u5BFC\u51FA\u8868\u4E2D\u6570\u636E\uFF0C\u652F\u6301\u591A\u79CD\u683C\u5F0F\u3002</li></ul><p><img src="https://mmbiz.qpic.cn/mmbiz_png/CKvMdchsUwkm2gfiaJAsqpn0skbVhpgQTu0aEwsvaOFZjPeWzWroMeFv6ZQArMJajY3Cmw745YJ71dMxxnoIfdg/640?wx_fmt=png" alt=""></p><h3 id="sql\u64CD\u4F5C" tabindex="-1"><a class="header-anchor" href="#sql\u64CD\u4F5C" aria-hidden="true">#</a> SQL\u64CD\u4F5C</h3><ul><li>\u5728\u4F7F\u7528Beekeeper Studio\u7684\u7F16\u8F91\u5668\u5199SQL\u7684\u65F6\u5019\uFF0C\u652F\u6301SQL\u8BED\u6CD5\u9AD8\u4EAE\uFF0C\u5BF9\u6570\u636E\u5E93\u8868\u548C\u5B57\u6BB5\u90FD\u53EF\u4EE5\u81EA\u52A8\u63D0\u793A\uFF1B</li></ul><p><img src="https://mmbiz.qpic.cn/mmbiz_gif/CKvMdchsUwkm2gfiaJAsqpn0skbVhpgQTiaExjiamHxcPufDiatD5Tw0f5D06tkTAe1zAAlrwMiaGIgB3aUnDSKhWjQ/640?wx_fmt=gif" alt=""></p><ul><li>\u6211\u4EEC\u8FD8\u53EF\u4EE5\u901A\u8FC7\u4FDD\u5B58\u6309\u94AE\u6765\u4FDD\u5B58\u9700\u8981\u7684SQL\u8BED\u53E5\uFF1B</li></ul><p><img src="https://mmbiz.qpic.cn/mmbiz_png/CKvMdchsUwkm2gfiaJAsqpn0skbVhpgQT1xKHc9l7yibKN8l9iakW2lHVEWsla1Y24KiaauAribNYo7gY1CotT6NKPQ/640?wx_fmt=png" alt=""></p><ul><li>\u7136\u540E\u70B9\u51FB\u5DE6\u4FA7\u6309\u94AE\u5C31\u53EF\u4EE5\u67E5\u770B\u4FDD\u5B58\u7684SQL\u8BED\u53E5\u4E86\uFF1B</li></ul><p><img src="https://mmbiz.qpic.cn/mmbiz_png/CKvMdchsUwkm2gfiaJAsqpn0skbVhpgQTslsksZlSv7kvFoPCpK6khibiaA7k6jUQ2VcmY0N1CbS4rhGpo9qn6ticg/640?wx_fmt=png" alt=""></p><ul><li>\u901A\u8FC7\u5DE6\u4FA7\u6309\u94AE\u6211\u4EEC\u8FD8\u53EF\u4EE5\u67E5\u770B\u6267\u884CSQL\u7684\u5386\u53F2\u8BB0\u5F55\u3002</li></ul><p><img src="https://mmbiz.qpic.cn/mmbiz_png/CKvMdchsUwkm2gfiaJAsqpn0skbVhpgQTvtAMcPia13E5PCaguEhmSRyBrE1E1iblNfHIkquTRr8bG9ZgEt1fUboA/640?wx_fmt=png" alt=""></p><h2 id="\u603B\u7ED3" tabindex="-1"><a class="header-anchor" href="#\u603B\u7ED3" aria-hidden="true">#</a> \u603B\u7ED3</h2><p>\u521A\u770B\u5230Beekeeper Studio\u6709\u70B9\u88AB\u60CA\u8273\u5230\u4E86\uFF0C\u754C\u9762\u786E\u5B9E\u5F88\u70AB\u9177\uFF0C\u529F\u80FD\u4E5F\u57FA\u672C\u591F\u7528\u3002\u4F46\u662FSQL\u63D0\u793A\u80FD\u529B\u6BD4\u8D77DataGrip\u548CNavicat\u6765\uFF0C\u786E\u5B9E\u6709\u70B9\u5F31\u3002\u4E0D\u80FD\u81EA\u52A8\u63D0\u793ASQL\u8BED\u6CD5\uFF0C\u53EA\u80FD\u63D0\u793A\u6570\u636E\u5E93\u8868\u548C\u5B57\u6BB5\uFF0C\u5BF9\u4E8ESQL\u8001\u624B\u6765\u8BF4\u5E94\u8BE5\u95EE\u9898\u4E0D\u5927\u3002\u603B\u7684\u6765\u8BF4\uFF0CBeekeeper Studio\u5728\u5F00\u6E90\u6570\u636E\u5E93\u7BA1\u7406\u5DE5\u5177\u4E2D\uFF0C\u8FD8\u662F\u975E\u5E38\u597D\u7528\u7684\u4E00\u6B3E\uFF0C\u559C\u6B22\u5B83\u754C\u9762\u7684\u670B\u53CB\u53EF\u4EE5\u8BD5\u8BD5\uFF01</p><h2 id="\u9879\u76EE\u5730\u5740" tabindex="-1"><a class="header-anchor" href="#\u9879\u76EE\u5730\u5740" aria-hidden="true">#</a> \u9879\u76EE\u5730\u5740</h2><p>https://github.com/beekeeper-studio/beekeeper-studio/</p><hr><p><strong>\u5FAE\u4FE18.0\u5C06\u597D\u53CB\u653E\u5F00\u5230\u4E86\u4E00\u4E07\uFF0C\u5C0F\u4F19\u4F34\u53EF\u4EE5\u52A0\u6211\u5927\u53F7\u4E86\uFF0C\u5148\u5230\u5148\u5F97\uFF0C\u518D\u6EE1\u5C31\u771F\u6CA1\u4E86</strong></p><p><strong>\u626B\u63CF\u4E0B\u65B9\u4E8C\u7EF4\u7801\u5373\u53EF\u52A0\u6211\u5FAE\u4FE1\u5566\uFF0C<code>2022\uFF0C\u62B1\u56E2\u53D6\u6696\uFF0C\u4E00\u8D77\u725B\u903C\u3002</code></strong></p><p><img src="https://mmbiz.qpic.cn/mmbiz_jpg/CKvMdchsUwkm2gfiaJAsqpn0skbVhpgQT6UzmmO5AuJzpqkcGNqqFuCCJEfE7m03spfImqCtBNFpbjCNibOwHTxw/640?wx_fmt=jpeg" alt=""></p><h2 id="\u63A8\u8350\u9605\u8BFB" tabindex="-1"><a class="header-anchor" href="#\u63A8\u8350\u9605\u8BFB" aria-hidden="true">#</a> \u63A8\u8350\u9605\u8BFB</h2>',52),h={href:"https://mp.weixin.qq.com/s?__biz=MzU1Nzg4NjgyMw==&mid=2247500084&idx=1&sn=5bd4e684af3cfede8f332c423a478abf&scene=21#wechat_redirect",target:"_blank",rel:"noopener noreferrer"},o=a("\u8FD8\u5728\u4ECE\u96F6\u5F00\u59CB\u642D\u5EFA\u9879\u76EE\uFF1F\u8FD9\u6B3E\u5347\u7EA7\u7248\u5FEB\u901F\u5F00\u53D1\u811A\u624B\u67B6\u503C\u5F97\u4E00\u8BD5\uFF01"),l={href:"https://mp.weixin.qq.com/s?__biz=MzU1Nzg4NjgyMw==&mid=2247500067&idx=1&sn=8edab30e461646436c0699a10d7ea6d3&scene=21#wechat_redirect",target:"_blank",rel:"noopener noreferrer"},g=a("\u65B0\u6765\u4E86\u4E2A\u6280\u672F\u603B\u76D1\uFF0C\u628ARedis\u5F53MQ\u7528\uFF0C\u662F\u6C34\u5E73\u6B20\u7F3A\u4E48\uFF1F"),b={href:"https://mp.weixin.qq.com/s?__biz=MzU1Nzg4NjgyMw==&mid=2247500055&idx=1&sn=3faa578dd23b296cdb4dbd19910d2a46&scene=21#wechat_redirect",target:"_blank",rel:"noopener noreferrer"},_=a("\u522B\u518D\u7528\u8FC7\u65F6\u7684\u65B9\u5F0F\u4E86\uFF01\u5168\u65B0\u7248\u672CSpring Security\uFF0C\u8FD9\u6837\u7528\u624D\u591F\u4F18\u96C5\uFF01"),f={href:"https://mp.weixin.qq.com/s?__biz=MzU1Nzg4NjgyMw==&mid=2247500010&idx=1&sn=d88da6cabffea66fc49ddf36883386c0&scene=21#wechat_redirect",target:"_blank",rel:"noopener noreferrer"},k=a("IDEA \u5B98\u5BA3\u5168\u65B0\u9ED8\u8BA4 UI \uFF01\u4F53\u9A8C\u4E86\u4E00\u628A\uFF0C\u88AB\u60CA\u8273\u5230\u4E86\uFF01"),u={href:"https://mp.weixin.qq.com/s?__biz=MzU1Nzg4NjgyMw==&mid=2247500006&idx=1&sn=92439b568765675d38cb8fff00b97c13&scene=21#wechat_redirect",target:"_blank",rel:"noopener noreferrer"},w=a("\u7535\u5546\u9879\u76EE\u4E2D\u7684\u4F18\u60E0\u5238\u7CFB\u7EDF\u8FD9\u6837\u8BBE\u8BA1\uFF0C\u540C\u4E8B\u76F4\u547C 666 \uFF01"),z={href:"https://mp.weixin.qq.com/s?__biz=MzU1Nzg4NjgyMw==&mid=2247499910&idx=1&sn=05c3177e74009bcaf309d5abd27ec4d5&scene=21#wechat_redirect",target:"_blank",rel:"noopener noreferrer"},x=a("\u7EBF\u4E0A\u9879\u76EE\u51FABUG\u6CA1\u6CD5\u8C03\u8BD5\uFF1F\u8FD9\u6B3E\u963F\u91CC\u5F00\u6E90\u7684\u8BCA\u65AD\u795E\u5668\uFF0C\u81EA\u5E26IDEA\u63D2\u4EF6\u771F\u9999\uFF01"),q={href:"https://mp.weixin.qq.com/s?__biz=MzU1Nzg4NjgyMw==&mid=2247499376&idx=1&sn=3ed28795cdd35fbaa3506e74a56703b0&scene=21#wechat_redirect",target:"_blank",rel:"noopener noreferrer"},M=a("\u91CD\u78C5\u66F4\u65B0\uFF01Mall\u5B9E\u6218\u6559\u7A0B\u5168\u9762\u5347\u7EA7\uFF0C\u77AC\u95F4\u9AD8\u5927\u4E0A\u4E86\uFF01"),A={href:"https://mp.weixin.qq.com/s?__biz=MzU1Nzg4NjgyMw==&mid=2247486684&idx=1&sn=807fd808adac8019eb2095ba088efe54&scene=21#wechat_redirect",target:"_blank",rel:"noopener noreferrer"},C=a("40K+Star\uFF01Mall\u7535\u5546\u5B9E\u6218\u9879\u76EE\u5F00\u6E90\u56DE\u5FC6\u5F55\uFF01"),N=e("p",null,[e("img",{src:"https://mmbiz.qpic.cn/mmbiz_gif/CKvMdchsUwlkU1ysoMgG69dVYbCQcI6Byneb8ibzZWPfUCr3T8CuBicCSGyFE6SpAtxpxtDCp6VlZ4F1hEL1BNyg/640?wx_fmt=gif",alt:""})],-1);function Q(v,S){const i=s("ExternalLinkIcon");return p(),c("div",null,[m,e("ul",null,[e("li",null,[e("a",h,[o,t(i)])]),e("li",null,[e("a",l,[g,t(i)])]),e("li",null,[e("a",b,[_,t(i)])]),e("li",null,[e("a",f,[k,t(i)])]),e("li",null,[e("a",u,[w,t(i)])]),e("li",null,[e("a",z,[x,t(i)])]),e("li",null,[e("a",q,[M,t(i)])]),e("li",null,[e("a",A,[C,t(i)])])]),N])}var J=n(d,[["render",Q],["__file","weixin-zaixsfdnavicatzkkydsjkglgjjmgxk.html.vue"]]);export{J as default};
diff --git a/dist/assets/weixin-zhongxcwbztashjjavahdmj.html.c99fcea1.js b/dist/assets/weixin-zhongxcwbztashjjavahdmj.html.2296ba72.js
similarity index 99%
rename from dist/assets/weixin-zhongxcwbztashjjavahdmj.html.c99fcea1.js
rename to dist/assets/weixin-zhongxcwbztashjjavahdmj.html.2296ba72.js
index beba0436..6a5750bc 100644
--- a/dist/assets/weixin-zhongxcwbztashjjavahdmj.html.c99fcea1.js
+++ b/dist/assets/weixin-zhongxcwbztashjjavahdmj.html.2296ba72.js
@@ -1 +1 @@
-import{_ as d}from"./plugin-vue_export-helper.21dcd24c.js";import{r as n,o,c as t,a as e,b as a,d as i,e as l}from"./app.a0271b9c.js";const r={},s={href:"https://mp.weixin.qq.com/s?__biz=Mzg2OTA0Njk0OA==&mid=2247519384&idx=1&sn=bc7e71af75350b755f04ca4178395b1a&chksm=cea1c353f9d64a458f797696d4144b4d6e58639371a4612b8e4d106d83a66d2289e7b2cd7431&token=660789642&lang=zh_CN&scene=21#wechat_redirect",target:"_blank",rel:"noopener noreferrer"},_=i("\u300AJava \u9762\u8BD5\u6307\u5317\u300B"),h=i("\u6765\u5566\uFF01\u8FD9\u662F\u4E00\u4EFD\u6559\u4F60\u5982\u4F55\u66F4\u9AD8\u6548\u5730\u51C6\u5907\u9762\u8BD5\u7684\u5C0F\u518C\uFF0C\u6DB5\u76D6\u5E38\u89C1\u516B\u80A1\u6587\uFF08\u7CFB\u7EDF\u8BBE\u8BA1\u3001\u5E38\u89C1\u6846\u67B6\u3001\u5206\u5E03\u5F0F\u3001\u9AD8\u5E76\u53D1 ......\uFF09\u3001\u4F18\u8D28\u9762\u7ECF\u7B49\u5185\u5BB9\u3002"),b=e("p",null,"JavaGuide \u5728\u7EBF\u9605\u8BFB\u7F51\u7AD9\uFF1Ahttps://javaguide.cn/",-1),f=e("p",null,"\u4F60\u597D\uFF0C\u6211\u662F Guide\u3002",-1),m=i("\u7B80\u5355\u5BF9"),p={href:"https://mp.weixin.qq.com/s?__biz=Mzg2OTA0Njk0OA==&mid=2247519201&idx=1&sn=b910e72ec34a1447ecece7e993bc977d&chksm=cea1c42af9d64d3c69ba4849fc9175b26a2219d67c2aa6dabb7b73d95f4c41b8a9461e818243&token=1878783075&lang=zh_CN&scene=21#wechat_redirect",target:"_blank",rel:"noopener noreferrer"},k=i("\u77E5\u8BC6\u661F\u7403"),g=i("\u7684\u7403\u53CB\u5206\u4EAB\u7684\u4E00\u4E9B\u4E2D\u5C0F\u5382\u9762\u7ECF\u505A\u4E86\u4E00\u4E0B\u603B\u7ED3\uFF0C\u51C6\u5907\u9762\u8BD5\u6216\u8005\u60F3\u8981\u8DF3\u69FD\u7684\u670B\u53CB\u53EF\u4EE5\u62FF\u6765\u81EA\u6D4B\u4E00\u4E0B\u3002"),u=e("p",null,"\u7531\u4E8E\u95EE\u9898\u592A\u591A\uFF0C\u6211\u8FD9\u91CC\u5C31\u4E0D\u8D34\u53C2\u8003\u7B54\u6848\u4E86\uFF0C\u9700\u8981\u53C2\u8003\u7B54\u6848\u7684\u670B\u53CB\u53EF\u4EE5\u5728\u4E0B\u9762 3 \u4E2A\u8D44\u6599\u4E2D\u627E\u5230\uFF1A",-1),z={href:"https://mp.weixin.qq.com/mp/appmsgalbum?__biz=Mzg2OTA0Njk0OA==&action=getalbum&album_id=1352302538565189634&scene=173&from_msgid=2247521040&from_itemidx=1&count=3&nolastread=1#wechat_redirect",target:"_blank",rel:"noopener noreferrer"},x=i("Java \u9762\u8BD5\u9898&\u9762\u7ECF\u6C47\u603B"),M={href:"https://mp.weixin.qq.com/s?__biz=Mzg2OTA0Njk0OA==&mid=2247519384&idx=1&sn=bc7e71af75350b755f04ca4178395b1a&chksm=cea1c353f9d64a458f797696d4144b4d6e58639371a4612b8e4d106d83a66d2289e7b2cd7431&token=660789642&lang=zh_CN&scene=21#wechat_redirect",target:"_blank",rel:"noopener noreferrer"},q=i("\u300AJava \u9762\u8BD5\u6307\u5317\u300B"),A=e("li",null,"JavaGuide \u5728\u7EBF\u9605\u8BFB\u7F51\u7AD9\uFF1Ahttps://javaguide.cn/",-1),w=i("\u4EE5\u4E0B\u9762\u7ECF\u6765\u81EA"),N={href:"https://mp.weixin.qq.com/s?__biz=Mzg2OTA0Njk0OA==&mid=2247519201&idx=1&sn=b910e72ec34a1447ecece7e993bc977d&chksm=cea1c42af9d64d3c69ba4849fc9175b26a2219d67c2aa6dabb7b73d95f4c41b8a9461e818243&token=1878783075&lang=zh_CN&scene=21#wechat_redirect",target:"_blank",rel:"noopener noreferrer"},O=i("\u77E5\u8BC6\u661F\u7403"),S=i("\u7684 W \u540C\u5B66\u3002"),j=l('<h2 id="\u4E94\u516B\u540C\u57CE" tabindex="-1"><a class="header-anchor" href="#\u4E94\u516B\u540C\u57CE" aria-hidden="true">#</a> \u4E94\u516B\u540C\u57CE</h2><ol><li>\u81EA\u6211\u4ECB\u7ECD\u3002</li><li>\u8BF4\u4E00\u4E0B\u9879\u76EE\u7684\u6280\u672F\u6808\u3002</li><li>\u9879\u76EE\u4E2D\u9047\u5230\u4E86\u4EC0\u4E48\u56F0\u96BE\uFF1F\u600E\u4E48\u89E3\u51B3\u7684\uFF1F</li><li>MySQL \u548C Redis \u600E\u4E48\u4FDD\u6301\u6570\u636E\u4E00\u81F4?</li><li>RocketMQ \u5E7F\u64AD\u6D88\u606F \u4E22\u5931\u6D88\u606F\u600E\u4E48\u529E\uFF1F</li><li>\u5206\u5E03\u5F0F\u4E8B\u52A1\u4E86\u89E3\u5417\uFF1F</li><li>\u8BF4\u4E00\u4E0B\u600E\u4E48\u5B9E\u73B0\u7684\u5206\u5E03\u5F0F\u4E8B\u52A1\uFF1F\u8FD8\u6709\u6CA1\u6709\u5176\u4ED6\u7684\u89E3\u51B3\u65B9\u6848\uFF1F</li><li>RocketMQ \u80FD\u505A\u5206\u5E03\u5F0F\u4E8B\u52A1\u5417\uFF1F</li><li>\u5E76\u53D1\u4E8B\u52A1\u5E26\u6765\u4E86\u54EA\u4E9B\u95EE\u9898?</li><li>\u95EE\u4E00\u4E0B MySQL \u9ED8\u8BA4\u9694\u79BB\u7EA7\u522B\uFF0C\u53EF\u4EE5\u89E3\u51B3\u5E7B\u8BFB\u5417\uFF1F\uFF08\u8003\u5BDF \u5F53\u524D\u8BFB \u5FEB\u7167\u8BFB \u95F4\u9699\u9501 \u7B49\uFF09</li><li>MySQL \u7684\u9694\u79BB\u7EA7\u522B\u662F\u57FA\u4E8E\u9501\u5B9E\u73B0\u7684\u5417\uFF1F</li><li>\u591A\u4E2A\u4EBA\u7ED9\u4E00\u4E2A\u4E3B\u64AD\u6253\u8D4F\u600E\u4E48\u8BBE\u8BA1\uFF1F\u6211\u8BF4\u662F\u4E00\u4E2A\u9AD8\u5E76\u53D1\u5199\u7684\u64CD\u4F5C\uFF0C\u5BF9\u4E00\u4E2A\u8BB0\u5F55\u9891\u7E41\u5199\uFF0C\u5206\u6279\u64CD\u4F5C\uFF0C\u6BD4\u5982 10 \u4E2A\u8BB0\u5F55 \u64CD\u4F5C\u4E00\u6B21\u3002\u4ED6\u8BF4\u8FD9\u4E2A\u65B9\u6848\u53EF\u4EE5 \u4F46\u662F\u6709 100 \u4E2A\u8BB0\u5F55 \u600E\u4E48\u53BB\u505A\u4E00\u4E2A\u4E00\u4E2A\u64CD\u4F5C\u5462\uFF1F\u6211\u8BF4\u5982\u679C\u5728\u4E00\u4E2A\u8FDB\u7A0B\u53EF\u4EE5 \u5206\u591A\u4E2A\u7EBF\u7A0B\u5206\u6279\u3002\u4ED6\u8BF4\u8FD8\u662F\u4E0D\u591F\u5FEB \u6211\u4EEC\u662F\u7528\u7684 MQ \u591A\u4E2A\u6D88\u8D39\u8005 \u4E00\u4E2A\u6253\u8D4F\u5C31\u53D1\u4E00\u4E2A\u6D88\u606F</li><li><code>synchronized</code> \u548C <code>volatile</code> \u533A\u522B\uFF1F</li><li><code>synchronized</code> \u6709\u4E86\u4E3A\u4EC0\u4E48\u8FD8\u8981 <code>ReentranLock</code> \uFF0C\u6709\u5565\u4E0D\u4E00\u6837\uFF1F</li><li>\u63A5\u53E3\u548C\u62BD\u8C61\u7C7B\u6709\u4EC0\u4E48\u533A\u522B\uFF1F</li><li>\u6CDB\u578B\u6709\u5565\u7528\uFF1F\u6CDB\u578B\u64E6\u9664\u662F\u5565\uFF1F</li></ol><p>\u603B\u7ED3\uFF1A\u6574\u4F53\u4E0A \u5148\u95EE\u9879\u76EE\u95EE\u9879\u76EE\u4F9D\u8D56\u7684\u4E2D\u95F4\u4EF6\uFF0C\u95EE\u6280\u672F\u65B9\u6848\u600E\u4E48\u8BBE\u8BA1\uFF0C\u6BD4\u8F83\u7B26\u5408\u5F00\u53D1\u573A\u666F\uFF0CMysSQL \u95F4\u9699\u9501\u9700\u8981\u8865\u5145\u4E00\u4E0B</p><p>\u6700\u540E\u70B9\u8BC4\uFF1A\u9879\u76EE\u548C\u6280\u672F\u5E7F\u5EA6\u5F88\u597D \u4F46\u662F\u6DF1\u5EA6\u4E0D\u591F\uFF0C\u8BF4 MySQL \u95F4\u9699\u9501\u4E0D\u662F\u5F88\u719F\u6089</p><h2 id="\u4E0A\u6D77\u4E2D\u901A" tabindex="-1"><a class="header-anchor" href="#\u4E0A\u6D77\u4E2D\u901A" aria-hidden="true">#</a> \u4E0A\u6D77\u4E2D\u901A</h2><ol><li>\u8BB2\u4E00\u4E0B <code>ArrayList</code> \u548C <code>HashMap</code> \u5E95\u5C42\u6570\u636E\u7ED3\u6784\uFF0C\u4F18\u7F3A\u70B9\uFF0C\u4F7F\u7528\u65B9\u5F0F\u3002</li><li><code>ConcurrentHashMap</code>\u6709\u7528\u8FC7\u5417\uFF1F</li><li>CAS \u8BBE\u8BA1\u601D\u8DEF\u548C\u539F\u7406\uFF1F</li><li><code>ThreadLocal</code> \u5E95\u5C42\u539F\u7406\uFF1F\u4EC0\u4E48\u573A\u666F\u4F7F\u7528\u7684 <code>ThreadLocal</code>\uFF1F</li><li>\u7528\u5230\u4E86 Java 8 \u7684\u54EA\u4E9B\u65B0\u7279\u6027\uFF1F</li><li>Lambda \u600E\u4E48\u7528\u7684\uFF0CStream \u7684\u5B9E\u73B0\u539F\u7406\uFF1F</li><li>\u9664\u4E86\u521A\u521A\u7684\u573A\u666F \u8FD8\u6709\u4EC0\u4E48\u573A\u666F\u4F7F\u7528\u8FC7\u5F02\u6B65\u4EFB\u52A1\uFF0C\u5E76\u53D1\u4EFB\u52A1\u8BA1\u7B97\u7ED3\u679C\u540E\u505A\u805A\u5408 \u4E48\u505A\uFF1F</li><li>\u7F51\u7EDC\u7F16\u7A0B\u7528\u8FC7\u5417\uFF1FIO \u8BB2\u4E00\u4E0B</li><li>\u4F60\u5F00\u53D1\u4E2D\u90FD\u7528\u5230\u4E86\u4EC0\u4E48\u8BBE\u8BA1\u6A21\u5F0F\uFF1F</li><li>\u5DE5\u5382\u6A21\u5F0F\u7684\u8BBE\u8BA1\u7406\u5FF5\u662F\u4EC0\u4E48\uFF1F\u6709\u4EC0\u4E48\u597D\u5904\uFF1F\u4F53\u73B0\u4E86\u4EC0\u4E48\u7F16\u7A0B\u601D\u60F3\uFF1F</li><li>\u9002\u914D\u5668\u6A21\u5F0F\u4E86\u89E3\u5417\uFF1F\u7B56\u7565\u548C\u9002\u914D\u5668\u6A21\u5F0F\u6709\u4EC0\u4E48\u533A\u522B\uFF0C\u4F60\u4E3A\u4EC0\u4E48\u9009\u62E9\u7528\u7B56\u7565\u6A21\u5F0F\u800C\u4E0D\u662F\u9002\u914D\u5668\u539F\u56E0\u662F\u4EC0\u4E48\uFF1F</li><li>JVM \u8C03\u4F18\u7ECF\u9A8C \u8BF4\u4E00\u4E0B\u505A\u4E86\u4EC0\u4E48\uFF1F</li><li>Spring \u4E8B\u52A1\u6CE8\u89E3 <code>Transaction</code> \u5B9E\u73B0\u539F\u7406\uFF1F</li><li>A \u65B9\u6CD5\u8C03\u7528 B \u65B9\u6CD5\uFF0C\u5982\u679C B \u65B9\u6CD5\u5F00\u542F\u4E8B\u52A1 \u5219\u76F4\u63A5\u7528 B \u65B9\u6CD5\u7684\u4E8B\u52A1\uFF0C\u5982\u679C\u662F\u4F60,\u4F60\u600E\u4E48\u8BBE\u8BA1\u600E\u4E48\u505A\uFF1F</li><li>InnoDB \u7684\u9ED8\u8BA4\u9694\u79BB\u7EA7\u522B\uFF0C\u53EF\u91CD\u590D\u8BFB\uFF0C\u89E3\u51B3\u4E86\u4EC0\u4E48\u95EE\u9898\uFF0C\u6CA1\u6709\u89E3\u51B3\u4EC0\u4E48\u95EE\u9898\uFF1F</li><li>\u4EC0\u4E48\u573A\u666F\u4E0B\u4F7F\u7528\u4E86 ES\uFF1F</li><li>\u5012\u6392\u7D22\u5F15 \u662F\u4EC0\u4E48\u8BB2\u4E00\u4E0B\uFF1F</li><li>\u4E3A\u4EC0\u4E48 ES \u68C0\u7D22\u6BD4\u8F83\u5FEB\uFF1F</li><li>\u4F60\u4F7F\u7528 MQ\uFF08RocketMQ \u548C Kafka\uFF09\u7684\u5E94\u7528\u573A\u666F\u4EC0\u4E48\uFF1F</li><li>\u4F60\u8BF4\u7CFB\u7EDF\u5355\u63A5\u53E3 qps \u8FBE\u5230\u4E86 8W \u4F60\u505A\u4E86\u6027\u80FD\u4F18\u5316\uFF0C\u8FD9\u4E2A\u662F\u600E\u4E48\u505A\u7684\uFF1F\u672C\u5730\u7F13\u5B58\u7528\u4E86\u4EC0\u4E48\u5220\u9664\u7B56\u7565\uFF1F\u672C\u5730\u7F13\u5B58\u8BBE\u7F6E\u4E86\u591A\u5927\uFF1F</li><li>\u505A\u4E86\u91CD\u8BD5\u4FDD\u8BC1\u8BA2\u5355\u7684\u6700\u7EC8\u4E00\u81F4\u6027 \u8FD9\u4E2A\u662F\u600E\u4E48\u505A\u7684\u91CD\u8BD5\uFF1F</li><li>MQ \u6D88\u606F\u79EF\u538B\u9047\u5230\u8FC7\u5417\uFF1F\u4F60\u662F\u600E\u4E48\u5904\u7406\u8FD9\u4E2A\uFF1F</li></ol>',6),T=i("\u4EE5\u4E0B\u9762\u7ECF\u6765\u81EA"),y={href:"https://mp.weixin.qq.com/s?__biz=Mzg2OTA0Njk0OA==&mid=2247519201&idx=1&sn=b910e72ec34a1447ecece7e993bc977d&chksm=cea1c42af9d64d3c69ba4849fc9175b26a2219d67c2aa6dabb7b73d95f4c41b8a9461e818243&token=1878783075&lang=zh_CN&scene=21#wechat_redirect",target:"_blank",rel:"noopener noreferrer"},v=i("\u77E5\u8BC6\u661F\u7403"),C=i("\u7684\u5085\u6653\u6D77\u540C\u5B66\u3002"),Q=l('<h2 id="\u4E0A\u6D77\u5B89\u7855\u4FE1\u606F" tabindex="-1"><a class="header-anchor" href="#\u4E0A\u6D77\u5B89\u7855\u4FE1\u606F" aria-hidden="true">#</a> \u4E0A\u6D77\u5B89\u7855\u4FE1\u606F</h2><ol><li>Dubbo \u4F7F\u7528\u7684\u6CE8\u518C\u4E2D\u5FC3\u548C\u63A8\u8350\u7684\u534F\u8BAE</li><li>Redis \u7684\u5177\u4F53\u5E94\u7528</li><li>Spring \u7684\u5E38\u7528\u6CE8\u89E3</li><li>MySQL \u7684\u9ED8\u8BA4\u6570\u636E\u5E93\u5F15\u64CE</li><li>MySQL \u652F\u6301\u54EA\u4E9B\u5B58\u50A8\u5F15\u64CE\uFF1F\u9ED8\u8BA4\u4F7F\u7528\u54EA\u4E2A\uFF1F</li><li>MyISAM \u548C InnoDB \u7684\u533A\u522B\u662F\u4EC0\u4E48\uFF1F</li><li>\u770B\u6BD5\u8BBE</li></ol><h2 id="\u4E0A\u6D77\u5730\u542C" tabindex="-1"><a class="header-anchor" href="#\u4E0A\u6D77\u5730\u542C" aria-hidden="true">#</a> \u4E0A\u6D77\u5730\u542C</h2><ol><li>\u4EC0\u4E48\u662F\u591A\u6001\uFF1F</li><li>JSP \u5185\u7F6E\u5BF9\u8C61\u6709\u54EA\u4E9B\uFF1F</li><li>\u4EC0\u4E48\u662F\u8DE8\u57DF\u95EE\u9898?\u5982\u4F55\u89E3\u51B3?</li><li>\u4E00\u4E2A Tomcat \u4E0A\u53D1\u5E03\u4E24\u4E2A\u9879\u76EE,\u4E00\u4E2A\u7AEF\u53E3 80,\u4E00\u4E2A 81,\u76F8\u4E92\u4E4B\u95F4\u8C03\u7528\u7B97\u4E0D\u7B97\u8DE8\u57DF</li><li>\u8BF4\u8BF4\u7D22\u5F15\u548C\u4E3B\u952E\u7684\u7528\u9014\u3002</li><li>MyBatis \u4E2D <code>#{}</code> \u548C <code>${}</code> \u7684\u533A\u522B?</li><li>\u5355\u4F8B\u6A21\u5F0F\u7684\u5B9E\u73B0\u3002</li><li>\u94FE\u8868\u548C\u961F\u5217\u7684\u7279\u70B9\uFF0C\u67E5\u8BE2\u548C\u589E\u5220\u6539\u7684\u65F6\u95F4\u590D\u6742\u5EA6\u3002</li><li>Spring \u7684\u5E38\u7528\u6CE8\u89E3</li><li><code>@Required</code> \u6CE8\u89E3\u7684\u4F5C\u7528</li><li>\u5982\u679C\u6709\u4E00\u6761 SQL \u8BED\u53E5\u6267\u884C\u7684\u5F88\u6162,\u600E\u4E48\u8FDB\u884C\u4F18\u5316?</li><li>\u5B58\u50A8\u8FC7\u7A0B\u662F\u4EC0\u4E48,\u6709\u4EC0\u4E48\u7279\u70B9?</li></ol><h2 id="\u5357\u4EAC\u6D69\u9CB8\u79D1\u6280" tabindex="-1"><a class="header-anchor" href="#\u5357\u4EAC\u6D69\u9CB8\u79D1\u6280" aria-hidden="true">#</a> \u5357\u4EAC\u6D69\u9CB8\u79D1\u6280</h2><ol><li>\u5E38\u7528\u7684\u6570\u636E\u7ED3\u6784\u6709\u54EA\u4E9B\uFF1F</li><li>\u6570\u7EC4\u548C\u94FE\u8868\u7684\u533A\u522B\uFF0C\u4EE5\u53CA\u83B7\u53D6\u5143\u7D20\u7684\u65F6\u95F4\u590D\u6742\u5EA6</li><li>\u7EBF\u7A0B\u6C60\u7684\u7279\u70B9\u548C\u5177\u4F53\u5B9E\u73B0\uFF0C\u7EBF\u7A0B\u7684\u72B6\u6001\uFF0C</li><li><code>notify()</code> \u548C <code>notifyall()</code> \u7684\u533A\u522B</li><li>MySQL \u7D22\u5F15\u7684\u5206\u7C7B</li><li>\u4EC0\u4E48\u662F\u89C6\u56FE</li><li>\u4E8B\u52A1\u7684\u9694\u79BB\u7EA7\u522B\u4EE5\u53CA\u89E3\u51B3\u4E86\u54EA\u4E9B\u95EE\u9898</li><li>IOC \u6E90\u7801</li><li>Spring \u5E38\u7528\u6CE8\u89E3\u548C\u4F5C\u7528</li><li>AoP \u7684\u5177\u4F53\u5E94\u7528</li><li>Spring \u4E8B\u52A1</li></ol><h2 id="\u4E0A\u6D77\u534E\u8BAF" tabindex="-1"><a class="header-anchor" href="#\u4E0A\u6D77\u534E\u8BAF" aria-hidden="true">#</a> \u4E0A\u6D77\u534E\u8BAF</h2><ol><li>\u63A5\u53E3\u548C\u62BD\u8C61\u7C7B\u7684\u533A\u522B</li><li>\u5185\u90E8\u7C7B\u6709\u54EA\u4E9B\u4EE5\u53CA\u7279\u70B9\u548C\u5E94\u7528</li><li>\u6570\u7EC4\u548C\u94FE\u8868</li><li>\u5FEB\u901F\u6392\u5E8F\u7B97\u6CD5</li><li>\u5F02\u5E38\u7684\u5904\u7406\u65B9\u5F0F</li><li><code>HashMap</code> \u7684\u5E95\u5C42\u6570\u636E\u7ED3\u6784</li><li><code>hashcode</code> \u7684\u4F5C\u7528\uFF0C\u5982\u679C <code>hashcode</code> \u76F8\u540C\uFF0C\u600E\u4E48\u5B58\u5165\u5143\u7D20</li><li>\u5185\u8FDE\u63A5\u548C\u5916\u8FDE\u63A5\u7684\u533A\u522B</li><li>\u5206\u7EC4\u67E5\u8BE2\u7684\u5173\u952E\u5B57</li><li>\u5982\u4F55\u5F00\u542F\u6162\u67E5\u8BE2\u65E5\u5FD7</li><li>\u6570\u636E\u5E93\u4F18\u5316\u6280\u5DE7</li><li>\u7D22\u5F15\u7684\u5206\u7C7B</li><li>\u4E3B\u952E\u7D22\u5F15\u548C\u552F\u4E00\u7D22\u5F15\u7684\u533A\u522B</li><li>Spring \u901A\u8FC7\u6CE8\u89E3\u5B9E\u73B0 DI \u7684\u539F\u7406</li><li>\u4EC0\u4E48\u662F RESTful \u98CE\u683C</li><li>Spring \u548C Mybatis \u6574\u5408\u7684\u6B65\u9AA4</li><li>Mybatis \u6267\u884C\u6D41\u7A0B</li></ol><p><strong>\xB7\xB7\xB7\xB7\xB7\xB7\xB7\xB7\xB7\xB7 END \xB7\xB7\xB7\xB7\xB7\xB7\xB7\xB7\xB7\xB7\xB7\xB7\xB7\xB7</strong></p>',9),L=i("\u6B22\u8FCE\u52A0\u5165\u6211\u7684"),I={href:"https://mp.weixin.qq.com/s?__biz=Mzg2OTA0Njk0OA==&mid=2247519201&idx=1&sn=b910e72ec34a1447ecece7e993bc977d&chksm=cea1c42af9d64d3c69ba4849fc9175b26a2219d67c2aa6dabb7b73d95f4c41b8a9461e818243&token=1878783075&lang=zh_CN&scene=21#wechat_redirect",target:"_blank",rel:"noopener noreferrer"},B=i("\u77E5\u8BC6\u661F\u7403"),J=i("\u83B7\u53D6\u66F4\u591A\u9762\u8BD5\u5E72\u8D27\uFF0C"),R={href:"https://mp.weixin.qq.com/s?__biz=Mzg2OTA0Njk0OA==&mid=2247519384&idx=1&sn=bc7e71af75350b755f04ca4178395b1a&chksm=cea1c353f9d64a458f797696d4144b4d6e58639371a4612b8e4d106d83a66d2289e7b2cd7431&token=660789642&lang=zh_CN&scene=21#wechat_redirect",target:"_blank",rel:"noopener noreferrer"},E=i("\u300AJava \u9762\u8BD5\u6307\u5317\u300B"),D=i("\u6301\u7EED\u66F4\u65B0\u5B8C\u5584\u4E2D\uFF01"),H=e("p",null,[e("img",{src:"https://mmbiz.qpic.cn/mmbiz_png/iaIdQfEric9TyGIdWmVOht6AvFIs6gqH9ZgaajiaKxicyza3eq3PWjcRRrSxSFQicFBkkQUORWxYibtsWHlHqLjhic9Sg/640?wx_fmt=png",alt:""})],-1),V=e("p",null,"\u300AJava \u9762\u8BD5\u6307\u5317\u300B\u76EE\u5F55",-1),W=e("p",null,"\u8FD1\u671F\u6587\u7AE0\u7CBE\u9009 \uFF1A",-1),G={href:"https://mp.weixin.qq.com/s?__biz=Mzg2OTA0Njk0OA==&mid=2247521303&idx=1&sn=4b61fcc28bb3c92732f7e92bbbe7e60b&chksm=cea1dbdcf9d652ca2aad9e505908a33e246f375e6cdf482b11882e3f8b843e83c8615142cd0f&token=538611389&lang=zh_CN&scene=21#wechat_redirect",target:"_blank",rel:"noopener noreferrer"},F=i("\u4ECA\u5E74\u627E\u5DE5\u4F5C\u6709\u70B9\u96BE\uFF01"),P={href:"https://mp.weixin.qq.com/s?__biz=Mzg2OTA0Njk0OA==&mid=2247520849&idx=1&sn=cc6631b532239ffcf615df7a79c018da&chksm=cea1dd9af9d6548cece4e4819a9ebf5002ace11fe61aed7e10c50a2ac29ae1b525587b508db8&token=2094715744&lang=zh_CN&scene=21#wechat_redirect",target:"_blank",rel:"noopener noreferrer"},K=i("\u4E0A\u5CB8\u7F8E\u56E2\u3001\u534E\u4E3A\u3001\u5B57\u8282\uFF01"),Z={href:"https://mp.weixin.qq.com/s?__biz=Mzg2OTA0Njk0OA==&mid=2247521040&idx=1&sn=d075c86309fe0e1b46517062557df04f&chksm=cea1dcdbf9d655cdd16e38749b46a12428c996b56543f693dc696026773801133a86ba83bc2e&token=787347680&lang=zh_CN&scene=21#wechat_redirect",target:"_blank",rel:"noopener noreferrer"},U=i("\u987A\u5229\u627E\u5230\u5DE5\u4F5C\u4E86"),Y={href:"https://mp.weixin.qq.com/s?__biz=Mzg2OTA0Njk0OA==&mid=2247519384&idx=1&sn=bc7e71af75350b755f04ca4178395b1a&chksm=cea1c353f9d64a458f797696d4144b4d6e58639371a4612b8e4d106d83a66d2289e7b2cd7431&token=660789642&lang=zh_CN&scene=21#wechat_redirect",target:"_blank",rel:"noopener noreferrer"},$=i("\u516B\u80A1\u6587\u53C8\u53C8\u53C8\u66F4\u65B0\u4E86\uFF01"),X={href:"https://mp.weixin.qq.com/s?__biz=Mzg2OTA0Njk0OA==&mid=2247520826&idx=1&sn=ac878b8e415e5d4d713378f27c7f1d35&chksm=cea1ddf1f9d654e753b3718ebb67d9a54c33f14f4a05e2b7527f62c5739983811bba7483d292&token=2094715744&lang=zh_CN&scene=21#wechat_redirect",target:"_blank",rel:"noopener noreferrer"},ee=i("\u5927\u4E13\u975E\u79D1\u73ED\u4E0A\u5CB8\u94F6\u884C\u5916\u5305\uFF0C\u5F88\u5F00\u5FC3\uFF01"),ie={href:"https://mp.weixin.qq.com/s?__biz=Mzg2OTA0Njk0OA==&mid=2247520785&idx=1&sn=406ca2c06c531f69a063252e829e59c4&chksm=cea1dddaf9d654cc0a821c5e5f9ecc3ad99d5b22d90a0b081b1da0182624d476c2617d07cb52&token=2094715744&lang=zh_CN&scene=21#wechat_redirect",target:"_blank",rel:"noopener noreferrer"},ce=i("\u62FF\u4E86\u51E0\u5341\u4E2A offer\uFF0C\u6211\u4F9D\u7136\u5F88 emo"),ae={href:"https://mp.weixin.qq.com/s?__biz=Mzg2OTA0Njk0OA==&mid=2247520732&idx=1&sn=f786634cfa830214e3ac5e70b7bbe748&chksm=cea1de17f9d657012c4156b140fd69da758c9786681835901b51ae893f7adf13b687caa2d68e&token=2094715744&lang=zh_CN&scene=21#wechat_redirect",target:"_blank",rel:"noopener noreferrer"},le=i("\u867E\u76AE\u4E8C\u9762\uFF1AMySQL \u652F\u6301\u54EA\u4E9B\u5B58\u50A8\u5F15\u64CE\uFF1FMyISAM \u548C InnoDB \u7684\u533A\u522B\u662F\u4EC0\u4E48\uFF1F"),de={href:"https://mp.weixin.qq.com/s?__biz=Mzg2OTA0Njk0OA==&mid=2247520633&idx=1&sn=aec35af40e3ed3b1e844addd04e31af5&chksm=cea1deb2f9d657a46a0684bbcbcb2900cebff39a2b2746a4a809b6b5306bce08d4382efd5ca8&token=2094715744&lang=zh_CN&scene=21#wechat_redirect",target:"_blank",rel:"noopener noreferrer"},ne=i("\u4E00\u6B3E\u8DE8\u65F6\u4EE3\u7684\u9AD8\u6027\u80FD Java \u6846\u67B6\uFF01\u542F\u52A8\u901F\u5EA6\u5FEB\u5230\u98DE\u8D77"),oe=e("p",null,"\u5982\u679C\u672C\u6587\u5BF9\u4F60\u6709\u5E2E\u52A9\u7684\u8BDD\uFF0C\u6B22\u8FCE\u70B9\u8D5E&\u5728\u770B&\u5206\u4EAB\uFF0C\u8FD9\u5BF9\u6211\u7EE7\u7EED\u5206\u4EAB&\u521B\u4F5C\u4F18\u8D28\u6587\u7AE0\u975E\u5E38\u91CD\u8981\u3002\u611F\u8C22\u{1F64F}\u{1F3FB}",-1);function te(re,se){const c=n("ExternalLinkIcon");return o(),t("div",null,[e("blockquote",null,[e("p",null,[e("a",s,[_,a(c)]),h]),b]),f,e("p",null,[m,e("a",p,[k,a(c)]),g]),u,e("ul",null,[e("li",null,[e("a",z,[x,a(c)])]),e("li",null,[e("a",M,[q,a(c)])]),A]),e("blockquote",null,[e("p",null,[w,e("a",N,[O,a(c)]),S])]),j,e("blockquote",null,[e("p",null,[T,e("a",y,[v,a(c)]),C])]),Q,e("p",null,[L,e("a",I,[B,a(c)]),J,e("a",R,[E,a(c)]),D]),H,V,W,e("ul",null,[e("li",null,[e("a",G,[F,a(c)])]),e("li",null,[e("a",P,[K,a(c)])]),e("li",null,[e("a",Z,[U,a(c)])]),e("li",null,[e("a",Y,[$,a(c)])]),e("li",null,[e("a",X,[ee,a(c)])]),e("li",null,[e("a",ie,[ce,a(c)])]),e("li",null,[e("a",ae,[le,a(c)])]),e("li",null,[e("a",de,[ne,a(c)])])]),oe])}var be=d(r,[["render",te],["__file","weixin-zhongxcwbztashjjavahdmj.html.vue"]]);export{be as default};
+import{_ as d}from"./plugin-vue_export-helper.21dcd24c.js";import{r as n,o,c as t,a as e,b as a,d as i,e as l}from"./app.615e41d8.js";const r={},s={href:"https://mp.weixin.qq.com/s?__biz=Mzg2OTA0Njk0OA==&mid=2247519384&idx=1&sn=bc7e71af75350b755f04ca4178395b1a&chksm=cea1c353f9d64a458f797696d4144b4d6e58639371a4612b8e4d106d83a66d2289e7b2cd7431&token=660789642&lang=zh_CN&scene=21#wechat_redirect",target:"_blank",rel:"noopener noreferrer"},_=i("\u300AJava \u9762\u8BD5\u6307\u5317\u300B"),h=i("\u6765\u5566\uFF01\u8FD9\u662F\u4E00\u4EFD\u6559\u4F60\u5982\u4F55\u66F4\u9AD8\u6548\u5730\u51C6\u5907\u9762\u8BD5\u7684\u5C0F\u518C\uFF0C\u6DB5\u76D6\u5E38\u89C1\u516B\u80A1\u6587\uFF08\u7CFB\u7EDF\u8BBE\u8BA1\u3001\u5E38\u89C1\u6846\u67B6\u3001\u5206\u5E03\u5F0F\u3001\u9AD8\u5E76\u53D1 ......\uFF09\u3001\u4F18\u8D28\u9762\u7ECF\u7B49\u5185\u5BB9\u3002"),b=e("p",null,"JavaGuide \u5728\u7EBF\u9605\u8BFB\u7F51\u7AD9\uFF1Ahttps://javaguide.cn/",-1),f=e("p",null,"\u4F60\u597D\uFF0C\u6211\u662F Guide\u3002",-1),m=i("\u7B80\u5355\u5BF9"),p={href:"https://mp.weixin.qq.com/s?__biz=Mzg2OTA0Njk0OA==&mid=2247519201&idx=1&sn=b910e72ec34a1447ecece7e993bc977d&chksm=cea1c42af9d64d3c69ba4849fc9175b26a2219d67c2aa6dabb7b73d95f4c41b8a9461e818243&token=1878783075&lang=zh_CN&scene=21#wechat_redirect",target:"_blank",rel:"noopener noreferrer"},k=i("\u77E5\u8BC6\u661F\u7403"),g=i("\u7684\u7403\u53CB\u5206\u4EAB\u7684\u4E00\u4E9B\u4E2D\u5C0F\u5382\u9762\u7ECF\u505A\u4E86\u4E00\u4E0B\u603B\u7ED3\uFF0C\u51C6\u5907\u9762\u8BD5\u6216\u8005\u60F3\u8981\u8DF3\u69FD\u7684\u670B\u53CB\u53EF\u4EE5\u62FF\u6765\u81EA\u6D4B\u4E00\u4E0B\u3002"),u=e("p",null,"\u7531\u4E8E\u95EE\u9898\u592A\u591A\uFF0C\u6211\u8FD9\u91CC\u5C31\u4E0D\u8D34\u53C2\u8003\u7B54\u6848\u4E86\uFF0C\u9700\u8981\u53C2\u8003\u7B54\u6848\u7684\u670B\u53CB\u53EF\u4EE5\u5728\u4E0B\u9762 3 \u4E2A\u8D44\u6599\u4E2D\u627E\u5230\uFF1A",-1),z={href:"https://mp.weixin.qq.com/mp/appmsgalbum?__biz=Mzg2OTA0Njk0OA==&action=getalbum&album_id=1352302538565189634&scene=173&from_msgid=2247521040&from_itemidx=1&count=3&nolastread=1#wechat_redirect",target:"_blank",rel:"noopener noreferrer"},x=i("Java \u9762\u8BD5\u9898&\u9762\u7ECF\u6C47\u603B"),M={href:"https://mp.weixin.qq.com/s?__biz=Mzg2OTA0Njk0OA==&mid=2247519384&idx=1&sn=bc7e71af75350b755f04ca4178395b1a&chksm=cea1c353f9d64a458f797696d4144b4d6e58639371a4612b8e4d106d83a66d2289e7b2cd7431&token=660789642&lang=zh_CN&scene=21#wechat_redirect",target:"_blank",rel:"noopener noreferrer"},q=i("\u300AJava \u9762\u8BD5\u6307\u5317\u300B"),A=e("li",null,"JavaGuide \u5728\u7EBF\u9605\u8BFB\u7F51\u7AD9\uFF1Ahttps://javaguide.cn/",-1),w=i("\u4EE5\u4E0B\u9762\u7ECF\u6765\u81EA"),N={href:"https://mp.weixin.qq.com/s?__biz=Mzg2OTA0Njk0OA==&mid=2247519201&idx=1&sn=b910e72ec34a1447ecece7e993bc977d&chksm=cea1c42af9d64d3c69ba4849fc9175b26a2219d67c2aa6dabb7b73d95f4c41b8a9461e818243&token=1878783075&lang=zh_CN&scene=21#wechat_redirect",target:"_blank",rel:"noopener noreferrer"},O=i("\u77E5\u8BC6\u661F\u7403"),S=i("\u7684 W \u540C\u5B66\u3002"),j=l('<h2 id="\u4E94\u516B\u540C\u57CE" tabindex="-1"><a class="header-anchor" href="#\u4E94\u516B\u540C\u57CE" aria-hidden="true">#</a> \u4E94\u516B\u540C\u57CE</h2><ol><li>\u81EA\u6211\u4ECB\u7ECD\u3002</li><li>\u8BF4\u4E00\u4E0B\u9879\u76EE\u7684\u6280\u672F\u6808\u3002</li><li>\u9879\u76EE\u4E2D\u9047\u5230\u4E86\u4EC0\u4E48\u56F0\u96BE\uFF1F\u600E\u4E48\u89E3\u51B3\u7684\uFF1F</li><li>MySQL \u548C Redis \u600E\u4E48\u4FDD\u6301\u6570\u636E\u4E00\u81F4?</li><li>RocketMQ \u5E7F\u64AD\u6D88\u606F \u4E22\u5931\u6D88\u606F\u600E\u4E48\u529E\uFF1F</li><li>\u5206\u5E03\u5F0F\u4E8B\u52A1\u4E86\u89E3\u5417\uFF1F</li><li>\u8BF4\u4E00\u4E0B\u600E\u4E48\u5B9E\u73B0\u7684\u5206\u5E03\u5F0F\u4E8B\u52A1\uFF1F\u8FD8\u6709\u6CA1\u6709\u5176\u4ED6\u7684\u89E3\u51B3\u65B9\u6848\uFF1F</li><li>RocketMQ \u80FD\u505A\u5206\u5E03\u5F0F\u4E8B\u52A1\u5417\uFF1F</li><li>\u5E76\u53D1\u4E8B\u52A1\u5E26\u6765\u4E86\u54EA\u4E9B\u95EE\u9898?</li><li>\u95EE\u4E00\u4E0B MySQL \u9ED8\u8BA4\u9694\u79BB\u7EA7\u522B\uFF0C\u53EF\u4EE5\u89E3\u51B3\u5E7B\u8BFB\u5417\uFF1F\uFF08\u8003\u5BDF \u5F53\u524D\u8BFB \u5FEB\u7167\u8BFB \u95F4\u9699\u9501 \u7B49\uFF09</li><li>MySQL \u7684\u9694\u79BB\u7EA7\u522B\u662F\u57FA\u4E8E\u9501\u5B9E\u73B0\u7684\u5417\uFF1F</li><li>\u591A\u4E2A\u4EBA\u7ED9\u4E00\u4E2A\u4E3B\u64AD\u6253\u8D4F\u600E\u4E48\u8BBE\u8BA1\uFF1F\u6211\u8BF4\u662F\u4E00\u4E2A\u9AD8\u5E76\u53D1\u5199\u7684\u64CD\u4F5C\uFF0C\u5BF9\u4E00\u4E2A\u8BB0\u5F55\u9891\u7E41\u5199\uFF0C\u5206\u6279\u64CD\u4F5C\uFF0C\u6BD4\u5982 10 \u4E2A\u8BB0\u5F55 \u64CD\u4F5C\u4E00\u6B21\u3002\u4ED6\u8BF4\u8FD9\u4E2A\u65B9\u6848\u53EF\u4EE5 \u4F46\u662F\u6709 100 \u4E2A\u8BB0\u5F55 \u600E\u4E48\u53BB\u505A\u4E00\u4E2A\u4E00\u4E2A\u64CD\u4F5C\u5462\uFF1F\u6211\u8BF4\u5982\u679C\u5728\u4E00\u4E2A\u8FDB\u7A0B\u53EF\u4EE5 \u5206\u591A\u4E2A\u7EBF\u7A0B\u5206\u6279\u3002\u4ED6\u8BF4\u8FD8\u662F\u4E0D\u591F\u5FEB \u6211\u4EEC\u662F\u7528\u7684 MQ \u591A\u4E2A\u6D88\u8D39\u8005 \u4E00\u4E2A\u6253\u8D4F\u5C31\u53D1\u4E00\u4E2A\u6D88\u606F</li><li><code>synchronized</code> \u548C <code>volatile</code> \u533A\u522B\uFF1F</li><li><code>synchronized</code> \u6709\u4E86\u4E3A\u4EC0\u4E48\u8FD8\u8981 <code>ReentranLock</code> \uFF0C\u6709\u5565\u4E0D\u4E00\u6837\uFF1F</li><li>\u63A5\u53E3\u548C\u62BD\u8C61\u7C7B\u6709\u4EC0\u4E48\u533A\u522B\uFF1F</li><li>\u6CDB\u578B\u6709\u5565\u7528\uFF1F\u6CDB\u578B\u64E6\u9664\u662F\u5565\uFF1F</li></ol><p>\u603B\u7ED3\uFF1A\u6574\u4F53\u4E0A \u5148\u95EE\u9879\u76EE\u95EE\u9879\u76EE\u4F9D\u8D56\u7684\u4E2D\u95F4\u4EF6\uFF0C\u95EE\u6280\u672F\u65B9\u6848\u600E\u4E48\u8BBE\u8BA1\uFF0C\u6BD4\u8F83\u7B26\u5408\u5F00\u53D1\u573A\u666F\uFF0CMysSQL \u95F4\u9699\u9501\u9700\u8981\u8865\u5145\u4E00\u4E0B</p><p>\u6700\u540E\u70B9\u8BC4\uFF1A\u9879\u76EE\u548C\u6280\u672F\u5E7F\u5EA6\u5F88\u597D \u4F46\u662F\u6DF1\u5EA6\u4E0D\u591F\uFF0C\u8BF4 MySQL \u95F4\u9699\u9501\u4E0D\u662F\u5F88\u719F\u6089</p><h2 id="\u4E0A\u6D77\u4E2D\u901A" tabindex="-1"><a class="header-anchor" href="#\u4E0A\u6D77\u4E2D\u901A" aria-hidden="true">#</a> \u4E0A\u6D77\u4E2D\u901A</h2><ol><li>\u8BB2\u4E00\u4E0B <code>ArrayList</code> \u548C <code>HashMap</code> \u5E95\u5C42\u6570\u636E\u7ED3\u6784\uFF0C\u4F18\u7F3A\u70B9\uFF0C\u4F7F\u7528\u65B9\u5F0F\u3002</li><li><code>ConcurrentHashMap</code>\u6709\u7528\u8FC7\u5417\uFF1F</li><li>CAS \u8BBE\u8BA1\u601D\u8DEF\u548C\u539F\u7406\uFF1F</li><li><code>ThreadLocal</code> \u5E95\u5C42\u539F\u7406\uFF1F\u4EC0\u4E48\u573A\u666F\u4F7F\u7528\u7684 <code>ThreadLocal</code>\uFF1F</li><li>\u7528\u5230\u4E86 Java 8 \u7684\u54EA\u4E9B\u65B0\u7279\u6027\uFF1F</li><li>Lambda \u600E\u4E48\u7528\u7684\uFF0CStream \u7684\u5B9E\u73B0\u539F\u7406\uFF1F</li><li>\u9664\u4E86\u521A\u521A\u7684\u573A\u666F \u8FD8\u6709\u4EC0\u4E48\u573A\u666F\u4F7F\u7528\u8FC7\u5F02\u6B65\u4EFB\u52A1\uFF0C\u5E76\u53D1\u4EFB\u52A1\u8BA1\u7B97\u7ED3\u679C\u540E\u505A\u805A\u5408 \u4E48\u505A\uFF1F</li><li>\u7F51\u7EDC\u7F16\u7A0B\u7528\u8FC7\u5417\uFF1FIO \u8BB2\u4E00\u4E0B</li><li>\u4F60\u5F00\u53D1\u4E2D\u90FD\u7528\u5230\u4E86\u4EC0\u4E48\u8BBE\u8BA1\u6A21\u5F0F\uFF1F</li><li>\u5DE5\u5382\u6A21\u5F0F\u7684\u8BBE\u8BA1\u7406\u5FF5\u662F\u4EC0\u4E48\uFF1F\u6709\u4EC0\u4E48\u597D\u5904\uFF1F\u4F53\u73B0\u4E86\u4EC0\u4E48\u7F16\u7A0B\u601D\u60F3\uFF1F</li><li>\u9002\u914D\u5668\u6A21\u5F0F\u4E86\u89E3\u5417\uFF1F\u7B56\u7565\u548C\u9002\u914D\u5668\u6A21\u5F0F\u6709\u4EC0\u4E48\u533A\u522B\uFF0C\u4F60\u4E3A\u4EC0\u4E48\u9009\u62E9\u7528\u7B56\u7565\u6A21\u5F0F\u800C\u4E0D\u662F\u9002\u914D\u5668\u539F\u56E0\u662F\u4EC0\u4E48\uFF1F</li><li>JVM \u8C03\u4F18\u7ECF\u9A8C \u8BF4\u4E00\u4E0B\u505A\u4E86\u4EC0\u4E48\uFF1F</li><li>Spring \u4E8B\u52A1\u6CE8\u89E3 <code>Transaction</code> \u5B9E\u73B0\u539F\u7406\uFF1F</li><li>A \u65B9\u6CD5\u8C03\u7528 B \u65B9\u6CD5\uFF0C\u5982\u679C B \u65B9\u6CD5\u5F00\u542F\u4E8B\u52A1 \u5219\u76F4\u63A5\u7528 B \u65B9\u6CD5\u7684\u4E8B\u52A1\uFF0C\u5982\u679C\u662F\u4F60,\u4F60\u600E\u4E48\u8BBE\u8BA1\u600E\u4E48\u505A\uFF1F</li><li>InnoDB \u7684\u9ED8\u8BA4\u9694\u79BB\u7EA7\u522B\uFF0C\u53EF\u91CD\u590D\u8BFB\uFF0C\u89E3\u51B3\u4E86\u4EC0\u4E48\u95EE\u9898\uFF0C\u6CA1\u6709\u89E3\u51B3\u4EC0\u4E48\u95EE\u9898\uFF1F</li><li>\u4EC0\u4E48\u573A\u666F\u4E0B\u4F7F\u7528\u4E86 ES\uFF1F</li><li>\u5012\u6392\u7D22\u5F15 \u662F\u4EC0\u4E48\u8BB2\u4E00\u4E0B\uFF1F</li><li>\u4E3A\u4EC0\u4E48 ES \u68C0\u7D22\u6BD4\u8F83\u5FEB\uFF1F</li><li>\u4F60\u4F7F\u7528 MQ\uFF08RocketMQ \u548C Kafka\uFF09\u7684\u5E94\u7528\u573A\u666F\u4EC0\u4E48\uFF1F</li><li>\u4F60\u8BF4\u7CFB\u7EDF\u5355\u63A5\u53E3 qps \u8FBE\u5230\u4E86 8W \u4F60\u505A\u4E86\u6027\u80FD\u4F18\u5316\uFF0C\u8FD9\u4E2A\u662F\u600E\u4E48\u505A\u7684\uFF1F\u672C\u5730\u7F13\u5B58\u7528\u4E86\u4EC0\u4E48\u5220\u9664\u7B56\u7565\uFF1F\u672C\u5730\u7F13\u5B58\u8BBE\u7F6E\u4E86\u591A\u5927\uFF1F</li><li>\u505A\u4E86\u91CD\u8BD5\u4FDD\u8BC1\u8BA2\u5355\u7684\u6700\u7EC8\u4E00\u81F4\u6027 \u8FD9\u4E2A\u662F\u600E\u4E48\u505A\u7684\u91CD\u8BD5\uFF1F</li><li>MQ \u6D88\u606F\u79EF\u538B\u9047\u5230\u8FC7\u5417\uFF1F\u4F60\u662F\u600E\u4E48\u5904\u7406\u8FD9\u4E2A\uFF1F</li></ol>',6),T=i("\u4EE5\u4E0B\u9762\u7ECF\u6765\u81EA"),y={href:"https://mp.weixin.qq.com/s?__biz=Mzg2OTA0Njk0OA==&mid=2247519201&idx=1&sn=b910e72ec34a1447ecece7e993bc977d&chksm=cea1c42af9d64d3c69ba4849fc9175b26a2219d67c2aa6dabb7b73d95f4c41b8a9461e818243&token=1878783075&lang=zh_CN&scene=21#wechat_redirect",target:"_blank",rel:"noopener noreferrer"},v=i("\u77E5\u8BC6\u661F\u7403"),C=i("\u7684\u5085\u6653\u6D77\u540C\u5B66\u3002"),Q=l('<h2 id="\u4E0A\u6D77\u5B89\u7855\u4FE1\u606F" tabindex="-1"><a class="header-anchor" href="#\u4E0A\u6D77\u5B89\u7855\u4FE1\u606F" aria-hidden="true">#</a> \u4E0A\u6D77\u5B89\u7855\u4FE1\u606F</h2><ol><li>Dubbo \u4F7F\u7528\u7684\u6CE8\u518C\u4E2D\u5FC3\u548C\u63A8\u8350\u7684\u534F\u8BAE</li><li>Redis \u7684\u5177\u4F53\u5E94\u7528</li><li>Spring \u7684\u5E38\u7528\u6CE8\u89E3</li><li>MySQL \u7684\u9ED8\u8BA4\u6570\u636E\u5E93\u5F15\u64CE</li><li>MySQL \u652F\u6301\u54EA\u4E9B\u5B58\u50A8\u5F15\u64CE\uFF1F\u9ED8\u8BA4\u4F7F\u7528\u54EA\u4E2A\uFF1F</li><li>MyISAM \u548C InnoDB \u7684\u533A\u522B\u662F\u4EC0\u4E48\uFF1F</li><li>\u770B\u6BD5\u8BBE</li></ol><h2 id="\u4E0A\u6D77\u5730\u542C" tabindex="-1"><a class="header-anchor" href="#\u4E0A\u6D77\u5730\u542C" aria-hidden="true">#</a> \u4E0A\u6D77\u5730\u542C</h2><ol><li>\u4EC0\u4E48\u662F\u591A\u6001\uFF1F</li><li>JSP \u5185\u7F6E\u5BF9\u8C61\u6709\u54EA\u4E9B\uFF1F</li><li>\u4EC0\u4E48\u662F\u8DE8\u57DF\u95EE\u9898?\u5982\u4F55\u89E3\u51B3?</li><li>\u4E00\u4E2A Tomcat \u4E0A\u53D1\u5E03\u4E24\u4E2A\u9879\u76EE,\u4E00\u4E2A\u7AEF\u53E3 80,\u4E00\u4E2A 81,\u76F8\u4E92\u4E4B\u95F4\u8C03\u7528\u7B97\u4E0D\u7B97\u8DE8\u57DF</li><li>\u8BF4\u8BF4\u7D22\u5F15\u548C\u4E3B\u952E\u7684\u7528\u9014\u3002</li><li>MyBatis \u4E2D <code>#{}</code> \u548C <code>${}</code> \u7684\u533A\u522B?</li><li>\u5355\u4F8B\u6A21\u5F0F\u7684\u5B9E\u73B0\u3002</li><li>\u94FE\u8868\u548C\u961F\u5217\u7684\u7279\u70B9\uFF0C\u67E5\u8BE2\u548C\u589E\u5220\u6539\u7684\u65F6\u95F4\u590D\u6742\u5EA6\u3002</li><li>Spring \u7684\u5E38\u7528\u6CE8\u89E3</li><li><code>@Required</code> \u6CE8\u89E3\u7684\u4F5C\u7528</li><li>\u5982\u679C\u6709\u4E00\u6761 SQL \u8BED\u53E5\u6267\u884C\u7684\u5F88\u6162,\u600E\u4E48\u8FDB\u884C\u4F18\u5316?</li><li>\u5B58\u50A8\u8FC7\u7A0B\u662F\u4EC0\u4E48,\u6709\u4EC0\u4E48\u7279\u70B9?</li></ol><h2 id="\u5357\u4EAC\u6D69\u9CB8\u79D1\u6280" tabindex="-1"><a class="header-anchor" href="#\u5357\u4EAC\u6D69\u9CB8\u79D1\u6280" aria-hidden="true">#</a> \u5357\u4EAC\u6D69\u9CB8\u79D1\u6280</h2><ol><li>\u5E38\u7528\u7684\u6570\u636E\u7ED3\u6784\u6709\u54EA\u4E9B\uFF1F</li><li>\u6570\u7EC4\u548C\u94FE\u8868\u7684\u533A\u522B\uFF0C\u4EE5\u53CA\u83B7\u53D6\u5143\u7D20\u7684\u65F6\u95F4\u590D\u6742\u5EA6</li><li>\u7EBF\u7A0B\u6C60\u7684\u7279\u70B9\u548C\u5177\u4F53\u5B9E\u73B0\uFF0C\u7EBF\u7A0B\u7684\u72B6\u6001\uFF0C</li><li><code>notify()</code> \u548C <code>notifyall()</code> \u7684\u533A\u522B</li><li>MySQL \u7D22\u5F15\u7684\u5206\u7C7B</li><li>\u4EC0\u4E48\u662F\u89C6\u56FE</li><li>\u4E8B\u52A1\u7684\u9694\u79BB\u7EA7\u522B\u4EE5\u53CA\u89E3\u51B3\u4E86\u54EA\u4E9B\u95EE\u9898</li><li>IOC \u6E90\u7801</li><li>Spring \u5E38\u7528\u6CE8\u89E3\u548C\u4F5C\u7528</li><li>AoP \u7684\u5177\u4F53\u5E94\u7528</li><li>Spring \u4E8B\u52A1</li></ol><h2 id="\u4E0A\u6D77\u534E\u8BAF" tabindex="-1"><a class="header-anchor" href="#\u4E0A\u6D77\u534E\u8BAF" aria-hidden="true">#</a> \u4E0A\u6D77\u534E\u8BAF</h2><ol><li>\u63A5\u53E3\u548C\u62BD\u8C61\u7C7B\u7684\u533A\u522B</li><li>\u5185\u90E8\u7C7B\u6709\u54EA\u4E9B\u4EE5\u53CA\u7279\u70B9\u548C\u5E94\u7528</li><li>\u6570\u7EC4\u548C\u94FE\u8868</li><li>\u5FEB\u901F\u6392\u5E8F\u7B97\u6CD5</li><li>\u5F02\u5E38\u7684\u5904\u7406\u65B9\u5F0F</li><li><code>HashMap</code> \u7684\u5E95\u5C42\u6570\u636E\u7ED3\u6784</li><li><code>hashcode</code> \u7684\u4F5C\u7528\uFF0C\u5982\u679C <code>hashcode</code> \u76F8\u540C\uFF0C\u600E\u4E48\u5B58\u5165\u5143\u7D20</li><li>\u5185\u8FDE\u63A5\u548C\u5916\u8FDE\u63A5\u7684\u533A\u522B</li><li>\u5206\u7EC4\u67E5\u8BE2\u7684\u5173\u952E\u5B57</li><li>\u5982\u4F55\u5F00\u542F\u6162\u67E5\u8BE2\u65E5\u5FD7</li><li>\u6570\u636E\u5E93\u4F18\u5316\u6280\u5DE7</li><li>\u7D22\u5F15\u7684\u5206\u7C7B</li><li>\u4E3B\u952E\u7D22\u5F15\u548C\u552F\u4E00\u7D22\u5F15\u7684\u533A\u522B</li><li>Spring \u901A\u8FC7\u6CE8\u89E3\u5B9E\u73B0 DI \u7684\u539F\u7406</li><li>\u4EC0\u4E48\u662F RESTful \u98CE\u683C</li><li>Spring \u548C Mybatis \u6574\u5408\u7684\u6B65\u9AA4</li><li>Mybatis \u6267\u884C\u6D41\u7A0B</li></ol><p><strong>\xB7\xB7\xB7\xB7\xB7\xB7\xB7\xB7\xB7\xB7 END \xB7\xB7\xB7\xB7\xB7\xB7\xB7\xB7\xB7\xB7\xB7\xB7\xB7\xB7</strong></p>',9),L=i("\u6B22\u8FCE\u52A0\u5165\u6211\u7684"),I={href:"https://mp.weixin.qq.com/s?__biz=Mzg2OTA0Njk0OA==&mid=2247519201&idx=1&sn=b910e72ec34a1447ecece7e993bc977d&chksm=cea1c42af9d64d3c69ba4849fc9175b26a2219d67c2aa6dabb7b73d95f4c41b8a9461e818243&token=1878783075&lang=zh_CN&scene=21#wechat_redirect",target:"_blank",rel:"noopener noreferrer"},B=i("\u77E5\u8BC6\u661F\u7403"),J=i("\u83B7\u53D6\u66F4\u591A\u9762\u8BD5\u5E72\u8D27\uFF0C"),R={href:"https://mp.weixin.qq.com/s?__biz=Mzg2OTA0Njk0OA==&mid=2247519384&idx=1&sn=bc7e71af75350b755f04ca4178395b1a&chksm=cea1c353f9d64a458f797696d4144b4d6e58639371a4612b8e4d106d83a66d2289e7b2cd7431&token=660789642&lang=zh_CN&scene=21#wechat_redirect",target:"_blank",rel:"noopener noreferrer"},E=i("\u300AJava \u9762\u8BD5\u6307\u5317\u300B"),D=i("\u6301\u7EED\u66F4\u65B0\u5B8C\u5584\u4E2D\uFF01"),H=e("p",null,[e("img",{src:"https://mmbiz.qpic.cn/mmbiz_png/iaIdQfEric9TyGIdWmVOht6AvFIs6gqH9ZgaajiaKxicyza3eq3PWjcRRrSxSFQicFBkkQUORWxYibtsWHlHqLjhic9Sg/640?wx_fmt=png",alt:""})],-1),V=e("p",null,"\u300AJava \u9762\u8BD5\u6307\u5317\u300B\u76EE\u5F55",-1),W=e("p",null,"\u8FD1\u671F\u6587\u7AE0\u7CBE\u9009 \uFF1A",-1),G={href:"https://mp.weixin.qq.com/s?__biz=Mzg2OTA0Njk0OA==&mid=2247521303&idx=1&sn=4b61fcc28bb3c92732f7e92bbbe7e60b&chksm=cea1dbdcf9d652ca2aad9e505908a33e246f375e6cdf482b11882e3f8b843e83c8615142cd0f&token=538611389&lang=zh_CN&scene=21#wechat_redirect",target:"_blank",rel:"noopener noreferrer"},F=i("\u4ECA\u5E74\u627E\u5DE5\u4F5C\u6709\u70B9\u96BE\uFF01"),P={href:"https://mp.weixin.qq.com/s?__biz=Mzg2OTA0Njk0OA==&mid=2247520849&idx=1&sn=cc6631b532239ffcf615df7a79c018da&chksm=cea1dd9af9d6548cece4e4819a9ebf5002ace11fe61aed7e10c50a2ac29ae1b525587b508db8&token=2094715744&lang=zh_CN&scene=21#wechat_redirect",target:"_blank",rel:"noopener noreferrer"},K=i("\u4E0A\u5CB8\u7F8E\u56E2\u3001\u534E\u4E3A\u3001\u5B57\u8282\uFF01"),Z={href:"https://mp.weixin.qq.com/s?__biz=Mzg2OTA0Njk0OA==&mid=2247521040&idx=1&sn=d075c86309fe0e1b46517062557df04f&chksm=cea1dcdbf9d655cdd16e38749b46a12428c996b56543f693dc696026773801133a86ba83bc2e&token=787347680&lang=zh_CN&scene=21#wechat_redirect",target:"_blank",rel:"noopener noreferrer"},U=i("\u987A\u5229\u627E\u5230\u5DE5\u4F5C\u4E86"),Y={href:"https://mp.weixin.qq.com/s?__biz=Mzg2OTA0Njk0OA==&mid=2247519384&idx=1&sn=bc7e71af75350b755f04ca4178395b1a&chksm=cea1c353f9d64a458f797696d4144b4d6e58639371a4612b8e4d106d83a66d2289e7b2cd7431&token=660789642&lang=zh_CN&scene=21#wechat_redirect",target:"_blank",rel:"noopener noreferrer"},$=i("\u516B\u80A1\u6587\u53C8\u53C8\u53C8\u66F4\u65B0\u4E86\uFF01"),X={href:"https://mp.weixin.qq.com/s?__biz=Mzg2OTA0Njk0OA==&mid=2247520826&idx=1&sn=ac878b8e415e5d4d713378f27c7f1d35&chksm=cea1ddf1f9d654e753b3718ebb67d9a54c33f14f4a05e2b7527f62c5739983811bba7483d292&token=2094715744&lang=zh_CN&scene=21#wechat_redirect",target:"_blank",rel:"noopener noreferrer"},ee=i("\u5927\u4E13\u975E\u79D1\u73ED\u4E0A\u5CB8\u94F6\u884C\u5916\u5305\uFF0C\u5F88\u5F00\u5FC3\uFF01"),ie={href:"https://mp.weixin.qq.com/s?__biz=Mzg2OTA0Njk0OA==&mid=2247520785&idx=1&sn=406ca2c06c531f69a063252e829e59c4&chksm=cea1dddaf9d654cc0a821c5e5f9ecc3ad99d5b22d90a0b081b1da0182624d476c2617d07cb52&token=2094715744&lang=zh_CN&scene=21#wechat_redirect",target:"_blank",rel:"noopener noreferrer"},ce=i("\u62FF\u4E86\u51E0\u5341\u4E2A offer\uFF0C\u6211\u4F9D\u7136\u5F88 emo"),ae={href:"https://mp.weixin.qq.com/s?__biz=Mzg2OTA0Njk0OA==&mid=2247520732&idx=1&sn=f786634cfa830214e3ac5e70b7bbe748&chksm=cea1de17f9d657012c4156b140fd69da758c9786681835901b51ae893f7adf13b687caa2d68e&token=2094715744&lang=zh_CN&scene=21#wechat_redirect",target:"_blank",rel:"noopener noreferrer"},le=i("\u867E\u76AE\u4E8C\u9762\uFF1AMySQL \u652F\u6301\u54EA\u4E9B\u5B58\u50A8\u5F15\u64CE\uFF1FMyISAM \u548C InnoDB \u7684\u533A\u522B\u662F\u4EC0\u4E48\uFF1F"),de={href:"https://mp.weixin.qq.com/s?__biz=Mzg2OTA0Njk0OA==&mid=2247520633&idx=1&sn=aec35af40e3ed3b1e844addd04e31af5&chksm=cea1deb2f9d657a46a0684bbcbcb2900cebff39a2b2746a4a809b6b5306bce08d4382efd5ca8&token=2094715744&lang=zh_CN&scene=21#wechat_redirect",target:"_blank",rel:"noopener noreferrer"},ne=i("\u4E00\u6B3E\u8DE8\u65F6\u4EE3\u7684\u9AD8\u6027\u80FD Java \u6846\u67B6\uFF01\u542F\u52A8\u901F\u5EA6\u5FEB\u5230\u98DE\u8D77"),oe=e("p",null,"\u5982\u679C\u672C\u6587\u5BF9\u4F60\u6709\u5E2E\u52A9\u7684\u8BDD\uFF0C\u6B22\u8FCE\u70B9\u8D5E&\u5728\u770B&\u5206\u4EAB\uFF0C\u8FD9\u5BF9\u6211\u7EE7\u7EED\u5206\u4EAB&\u521B\u4F5C\u4F18\u8D28\u6587\u7AE0\u975E\u5E38\u91CD\u8981\u3002\u611F\u8C22\u{1F64F}\u{1F3FB}",-1);function te(re,se){const c=n("ExternalLinkIcon");return o(),t("div",null,[e("blockquote",null,[e("p",null,[e("a",s,[_,a(c)]),h]),b]),f,e("p",null,[m,e("a",p,[k,a(c)]),g]),u,e("ul",null,[e("li",null,[e("a",z,[x,a(c)])]),e("li",null,[e("a",M,[q,a(c)])]),A]),e("blockquote",null,[e("p",null,[w,e("a",N,[O,a(c)]),S])]),j,e("blockquote",null,[e("p",null,[T,e("a",y,[v,a(c)]),C])]),Q,e("p",null,[L,e("a",I,[B,a(c)]),J,e("a",R,[E,a(c)]),D]),H,V,W,e("ul",null,[e("li",null,[e("a",G,[F,a(c)])]),e("li",null,[e("a",P,[K,a(c)])]),e("li",null,[e("a",Z,[U,a(c)])]),e("li",null,[e("a",Y,[$,a(c)])]),e("li",null,[e("a",X,[ee,a(c)])]),e("li",null,[e("a",ie,[ce,a(c)])]),e("li",null,[e("a",ae,[le,a(c)])]),e("li",null,[e("a",de,[ne,a(c)])])]),oe])}var be=d(r,[["render",te],["__file","weixin-zhongxcwbztashjjavahdmj.html.vue"]]);export{be as default};
diff --git a/dist/assets/weixin-zuixinbujiabandigongsimingdan.html.4000ddf4.js b/dist/assets/weixin-zuixinbujiabandigongsimingdan.html.d0426aa9.js
similarity index 98%
rename from dist/assets/weixin-zuixinbujiabandigongsimingdan.html.4000ddf4.js
rename to dist/assets/weixin-zuixinbujiabandigongsimingdan.html.d0426aa9.js
index 17192ffa..20da6f54 100644
--- a/dist/assets/weixin-zuixinbujiabandigongsimingdan.html.4000ddf4.js
+++ b/dist/assets/weixin-zuixinbujiabandigongsimingdan.html.d0426aa9.js
@@ -1 +1 @@
-import{_ as t}from"./plugin-vue_export-helper.21dcd24c.js";import{r as o,o as n,c as a,a as i,b as r,e as c,d as l}from"./app.a0271b9c.js";const s={},p=c('<p>\u8FD9\u662Fgithub\u4E0A\u7684\u4E00\u4E2A\u5F00\u6E90\u9879\u76EE\uFF1A955.WLB\uFF0C\u4E0A\u9762\u5217\u4E3E\u4E86\u7A0B\u5E8F\u5458\u4EEC\u6C47\u603B\u7684 955 \u4F5C\u606F\u7684\u516C\u53F8\u540D\u5355\uFF0C\u65E8\u5728\u4FC3\u8FDB\u7801\u519C\u7684\u5DE5\u4F5C\u751F\u6D3B\u5E73\u8861\uFF0C\u6587\u672B\u300C\u9605\u8BFB\u539F\u6587\u300D\u9644\u4E0A\u4E86 github \u9879\u76EE\u5730\u5740\uFF0C\u611F\u5174\u8DA3\u53EF\u4EE5\u770B\u770B\u3002</p><ul><li>996 \u5DE5\u4F5C\u5236\uFF1A\u5373\u6BCF\u5929\u65E9 9 \u70B9\u5230\u5C97\uFF0C\u4E00\u76F4\u5DE5\u4F5C\u5230\u665A\u4E0A 9 \u70B9\u3002\u6BCF\u5468\u5DE5\u4F5C 6 \u5929\u3002</li><li>955 \u5DE5\u4F5C\u5236\uFF1A\u5373\u6BCF\u5929\u65E9 9 \u70B9\u5230\u5C97\uFF0C\u4E00\u76F4\u5DE5\u4F5C\u5230\u4E0B\u5348 5 \u70B9\u3002\u6BCF\u5468\u5DE5\u4F5C 5 \u5929\u3002</li><li>944 \u5DE5\u4F5C\u5236\uFF1A\u5373\u6BCF\u5929\u4E0A\u5348 9 \u70B9\u5230\u5C97\uFF0C\u4E00\u76F4\u5DE5\u4F5C\u5230\u4E0B\u5348 4 \u70B9\u3002\u6BCF\u5468\u5DE5\u4F5C 4 \u5929\u3002</li></ul><h2 id="\u8BF4\u660E" tabindex="-1"><a class="header-anchor" href="#\u8BF4\u660E" aria-hidden="true">#</a> \u8BF4\u660E</h2><p>\u4EE5\u4E0B\u516C\u53F8\u540D\u5355\uFF0C\u57FA\u672C\u4E0D\u5C5E\u4E8E 996 \u7684\u516C\u53F8\uFF0C\u76F8\u5BF9\u63A5\u8FD1 955/965 \u7684\u6C34\u5E73\uFF0C\u4F46\u662F\u4F9D\u65E7\u8981\u770B\u90E8\u95E8\u548C\u5730\u533A\uFF0C\u4E0D\u80FD\u4FDD\u8BC1\u5B8C\u5168\u51C6\u786E\u6027\u3002</p><ul><li>\u4E0D\u80FD\u4FDD\u8BC1\u6240\u6709\u90E8\u95E8\u90FD\u662F 955/10-6-5/965/10-7-5 \u7684\u6C34\u5E73</li><li>\u5C31\u7B97\u90E8\u95E8\u7684\u5E73\u5747\u6C34\u5E73\u662F 955/10-6-5/965/10-7-5\uFF0C\u4E5F\u6709\u53EF\u80FD\u90E8\u5206\u65F6\u95F4\u8981\u52A0\u73ED</li><li>\u540D\u5355\u4E2D\u90E8\u5206\u516C\u53F8\u7684\u90E8\u5206\u90E8\u95E8\u53EF\u80FD\u6709 975 \u751A\u81F3 985 \u7684\u60C5\u51B5\uFF0C\u4E0D\u8981\u4EE5\u504F\u6982\u5168</li><li>\u540D\u5355\u4E2D\u90E8\u5206\u516C\u53F8\u7684\u90E8\u5206\u751A\u81F3\u8F83\u591A\u90E8\u95E8\u53EF\u80FD\u6709 945\u300110-5-5 \u6216\u8005 11-6-5 \u7684\u60C5\u51B5\uFF0C\u6211\u4EEC\u4E5F\u628A\u4ED6\u4EEC\u52A0\u5165\u5728\u540D\u5355\u4E2D</li></ul><blockquote><p>\u53E6\u5916\uFF0C\u7EDF\u8BA1\u4E00\u5B9A\u4E0D\u5B8C\u5168\uFF0C\u6B22\u8FCE\u5404\u4F4D\u540C\u884C\u7559\u8A00\u8865\u5145\uFF0C\u52A1\u6C42\u771F\u5B9E\uFF01</p></blockquote><h2 id="_955-\u7684\u516C\u53F8\u540D\u5355" tabindex="-1"><a class="header-anchor" href="#_955-\u7684\u516C\u53F8\u540D\u5355" aria-hidden="true">#</a> 955 \u7684\u516C\u53F8\u540D\u5355</h2><ul><li>Afterpay - \u4E0A\u6D77</li><li>Amazon - \u5317\u4EAC/\u4E0A\u6D77</li><li>AMD - \u4E0A\u6D77</li><li>ARM - \u4E0A\u6D77</li><li>Airbnb - \u5317\u4EAC</li><li>Apple - \u5317\u4EAC/\u4E0A\u6D77</li><li>ArcSoft - \u676D\u5DDE</li><li>Autodesk - \u5317\u4EAC/\u4E0A\u6D77</li></ul><p>-Booking - \u4E0A\u6D77</p><ul><li>Calix - \u5357\u4EAC</li><li>Citrix - \u5357\u4EAC</li><li>Cisco - \u5317\u4EAC/\u4E0A\u6D77/\u676D\u5DDE/\u82CF\u5DDE</li><li>Coolapk (\u9177\u5B89) - \u5317\u4EAC/\u6DF1\u5733</li><li>Coupang - \u5317\u4EAC/\u4E0A\u6D77</li><li>CSTC (\u82B1\u65D7\u91D1\u878D) - \u4E0A\u6D77</li><li>Dell - \u4E0A\u6D77</li><li>Douban (\u8C46\u74E3) - \u5317\u4EAC</li><li>eBay - \u4E0A\u6D77</li><li>eHealth - \u53A6\u95E8</li><li>Electronic Arts - \u4E0A\u6D77</li><li>EMC - \u4E0A\u6D77</li><li>Ericsson - \u4E0A\u6D77</li><li>Flexport - \u4E0A\u6D77/\u6DF1\u5733</li><li>FreeWheel - \u5317\u4EAC</li><li>GE - \u4E0A\u6D77</li><li>Google - \u5317\u4EAC/\u4E0A\u6D77</li><li>Grab - \u5317\u4EAC</li><li>Honeywell - \u4E0A\u6D77</li><li>HP - \u4E0A\u6D77</li><li>HSBC - \u4E0A\u6D77/\u5E7F\u5DDE/\u897F\u5B89</li><li>Hulu - \u5317\u4EAC</li><li>IBM (GBS\u9664\u5916) - \u4E0A\u6D77</li><li>iHerb - \u4E0A\u6D77</li><li>Intel - \u4E0A\u6D77/\u6DF1\u5733</li><li>LeetCode - \u4E0A\u6D77</li><li>Linkedin - \u5317\u4EAC</li><li>Micro Focus - \u4E0A\u6D77</li><li>Microsoft - \u5317\u4EAC/\u4E0A\u6D77/\u82CF\u5DDE</li><li>MicroStrategy - \u676D\u5DDE</li><li>National Instruments - \u4E0A\u6D77</li><li>Nokia - \u5357\u4EAC/\u676D\u5DDE</li><li>NVIDIA - \u5317\u4EAC/\u4E0A\u6D77</li><li>Oracle - \u4E0A\u6D77</li><li>PayPal - \u4E0A\u6D77</li><li>Pivotal - \u5317\u4EAC/\u4E0A\u6D77</li><li>Qualcomm - \u5317\u4EAC/\u4E0A\u6D77</li><li>Red Hat - \u5317\u4EAC/\u4E0A\u6D77/\u6DF1\u5733/\u897F\u5B89/remote</li><li>RingCentral - \u53A6\u95E8/\u676D\u5DDE/\u9999\u6E2F</li><li>SAP - \u4E0A\u6D77</li><li>Shopee - \u5317\u4EAC/\u4E0A\u6D77/\u6DF1\u5733</li><li>SmartNews - \u5317\u4EAC/\u4E0A\u6D77</li><li>Snap - \u5317\u4EAC/\u6DF1\u5733</li><li>State Street - \u676D\u5DDE</li><li>SUSE - \u5317\u4EAC/\u4E0A\u6D77/\u6DF1\u5733</li><li>ThoughtWorks - \u897F\u5B89/\u5317\u4EAC/\u6DF1\u5733/\u6210\u90FD/\u6B66\u6C49/\u4E0A\u6D77/\u9999\u6E2F</li><li>Trend Micro - \u5357\u4EAC</li><li>TuSimple - \u5317\u4EAC/\u4E0A\u6D77</li><li>Ubisoft - \u4E0A\u6D77</li><li>Unity - \u4E0A\u6D77</li><li>Vipshop (\u552F\u54C1\u4F1A) - \u4E0A\u6D77</li><li>VMware - \u5317\u4EAC/\u4E0A\u6D77</li><li>WeWork - \u4E0A\u6D77</li><li>Wish - \u4E0A\u6D77</li><li>Works Applications - \u4E0A\u6D77</li><li>XMind - \u6DF1\u5733</li><li>Zhihu (\u77E5\u4E4E) - \u5317\u4EAC</li><li>Zoom - \u5408\u80A5/\u676D\u5DDE/\u82CF\u5DDE</li></ul><blockquote><p>\u826F\u597D\u7684\u884C\u4E1A\u98CE\u6C14\u6709\u52A9\u4E8E\u5404\u4F4D\u540C\u884C\u53D1\u5C55\uFF0C\u4E3A\u8FD9\u7C7B\u4F01\u4E1A\u70B9\u8D5E\uFF01</p></blockquote><p><img src="https://mmbiz.qpic.cn/mmbiz_jpg/icmWrEONNM8XatxbCxk8v6frsbtPJg9XAicBOPflHOdlPYtCcNFmPqnB4iafDDXYuria2Bcib0noeyUiayxgPXbI8Y7g/640?wx_fmt=jpeg" alt=""></p><p>\u4F60\u597D\uFF0C\u6211\u662F\u516C\u5B50\u9F99\uFF0C\u6BD5\u4E1A\u4E8E\u4E2D\u79D1\u9662\uFF0C\u524D\u5927\u578B\u8BA1\u7B97\u673A\u7ADE\u8D5B\u51A0\u519B\uFF0C\u73B0\u5927\u5382\u5DE5\u7A0B\u5E08\uFF0C\u62FF\u8FC7\u4E5D\u5BB6\u5927\u5382\u7684 offer \u3002</p>',13),d=l("\u5317\u6F02\u4E03\u5E74\uFF0C\u4ECE\u5C0F\u767D\u5230\u8BA1\u7B97\u673A\u7ADE\u8D5B\u51A0\u519B\uFF0C\u8BFB\u7814\u65F6\u901A\u8FC7\u5B9E\u4E60\u548C\u6BD4\u8D5B\u6536\u5165 50 \u4E07\uFF0C"),u={href:"http://mp.weixin.qq.com/s?__biz=MzIzNTI3MTQxMg==&mid=2652539525&idx=1&sn=800a2b635fcc59813f9e7948b97fc636&chksm=f3078f1ec4700608579e837cdf4da7d30f41e24a68f8e14f585f662d673d0108218d92b751ec&scene=21#wechat_redirect",target:"_blank",rel:"noopener noreferrer"},h=i("strong",null,"\u70B9\u51FB\u84DD\u5B57\u67E5\u770B\u6211\u7684\u7F16\u7A0B\u4E4B\u8DEF",-1),m=l("\u3002"),_=i("p",null,"\u540C\u65F6\uFF0C\u6211\u4E5F\u662F b \u7AD9 up \u4E3B\uFF1A\u516C\u5B50\u9F99\u9F99\u9F99\uFF0C\u65E5\u5E38\u5206\u4EAB\u9AD8\u8D28\u91CF\u8D44\u6599\uFF0C\u8F93\u51FA\u9762\u8BD5\u3001\u5DE5\u4F5C\u7ECF\u9A8C\uFF0C\u6B22\u8FCE\u56F4\u89C2\u3002",-1),b=i("p",null,[i("img",{src:"https://mmbiz.qpic.cn/mmbiz_png/icmWrEONNM8XatxbCxk8v6frsbtPJg9XAEVdujF0Q5RsAL2v6rvNnGOcP32BAGyENsia2oTib89vlWK8Cg5IqJUZw/640?wx_fmt=png",alt:""})],-1);function f(g,x){const e=o("ExternalLinkIcon");return n(),a("div",null,[p,i("p",null,[d,i("a",u,[h,m,r(e)])]),_,b])}var C=t(s,[["render",f],["__file","weixin-zuixinbujiabandigongsimingdan.html.vue"]]);export{C as default};
+import{_ as t}from"./plugin-vue_export-helper.21dcd24c.js";import{r as o,o as n,c as a,a as i,b as r,e as c,d as l}from"./app.615e41d8.js";const s={},p=c('<p>\u8FD9\u662Fgithub\u4E0A\u7684\u4E00\u4E2A\u5F00\u6E90\u9879\u76EE\uFF1A955.WLB\uFF0C\u4E0A\u9762\u5217\u4E3E\u4E86\u7A0B\u5E8F\u5458\u4EEC\u6C47\u603B\u7684 955 \u4F5C\u606F\u7684\u516C\u53F8\u540D\u5355\uFF0C\u65E8\u5728\u4FC3\u8FDB\u7801\u519C\u7684\u5DE5\u4F5C\u751F\u6D3B\u5E73\u8861\uFF0C\u6587\u672B\u300C\u9605\u8BFB\u539F\u6587\u300D\u9644\u4E0A\u4E86 github \u9879\u76EE\u5730\u5740\uFF0C\u611F\u5174\u8DA3\u53EF\u4EE5\u770B\u770B\u3002</p><ul><li>996 \u5DE5\u4F5C\u5236\uFF1A\u5373\u6BCF\u5929\u65E9 9 \u70B9\u5230\u5C97\uFF0C\u4E00\u76F4\u5DE5\u4F5C\u5230\u665A\u4E0A 9 \u70B9\u3002\u6BCF\u5468\u5DE5\u4F5C 6 \u5929\u3002</li><li>955 \u5DE5\u4F5C\u5236\uFF1A\u5373\u6BCF\u5929\u65E9 9 \u70B9\u5230\u5C97\uFF0C\u4E00\u76F4\u5DE5\u4F5C\u5230\u4E0B\u5348 5 \u70B9\u3002\u6BCF\u5468\u5DE5\u4F5C 5 \u5929\u3002</li><li>944 \u5DE5\u4F5C\u5236\uFF1A\u5373\u6BCF\u5929\u4E0A\u5348 9 \u70B9\u5230\u5C97\uFF0C\u4E00\u76F4\u5DE5\u4F5C\u5230\u4E0B\u5348 4 \u70B9\u3002\u6BCF\u5468\u5DE5\u4F5C 4 \u5929\u3002</li></ul><h2 id="\u8BF4\u660E" tabindex="-1"><a class="header-anchor" href="#\u8BF4\u660E" aria-hidden="true">#</a> \u8BF4\u660E</h2><p>\u4EE5\u4E0B\u516C\u53F8\u540D\u5355\uFF0C\u57FA\u672C\u4E0D\u5C5E\u4E8E 996 \u7684\u516C\u53F8\uFF0C\u76F8\u5BF9\u63A5\u8FD1 955/965 \u7684\u6C34\u5E73\uFF0C\u4F46\u662F\u4F9D\u65E7\u8981\u770B\u90E8\u95E8\u548C\u5730\u533A\uFF0C\u4E0D\u80FD\u4FDD\u8BC1\u5B8C\u5168\u51C6\u786E\u6027\u3002</p><ul><li>\u4E0D\u80FD\u4FDD\u8BC1\u6240\u6709\u90E8\u95E8\u90FD\u662F 955/10-6-5/965/10-7-5 \u7684\u6C34\u5E73</li><li>\u5C31\u7B97\u90E8\u95E8\u7684\u5E73\u5747\u6C34\u5E73\u662F 955/10-6-5/965/10-7-5\uFF0C\u4E5F\u6709\u53EF\u80FD\u90E8\u5206\u65F6\u95F4\u8981\u52A0\u73ED</li><li>\u540D\u5355\u4E2D\u90E8\u5206\u516C\u53F8\u7684\u90E8\u5206\u90E8\u95E8\u53EF\u80FD\u6709 975 \u751A\u81F3 985 \u7684\u60C5\u51B5\uFF0C\u4E0D\u8981\u4EE5\u504F\u6982\u5168</li><li>\u540D\u5355\u4E2D\u90E8\u5206\u516C\u53F8\u7684\u90E8\u5206\u751A\u81F3\u8F83\u591A\u90E8\u95E8\u53EF\u80FD\u6709 945\u300110-5-5 \u6216\u8005 11-6-5 \u7684\u60C5\u51B5\uFF0C\u6211\u4EEC\u4E5F\u628A\u4ED6\u4EEC\u52A0\u5165\u5728\u540D\u5355\u4E2D</li></ul><blockquote><p>\u53E6\u5916\uFF0C\u7EDF\u8BA1\u4E00\u5B9A\u4E0D\u5B8C\u5168\uFF0C\u6B22\u8FCE\u5404\u4F4D\u540C\u884C\u7559\u8A00\u8865\u5145\uFF0C\u52A1\u6C42\u771F\u5B9E\uFF01</p></blockquote><h2 id="_955-\u7684\u516C\u53F8\u540D\u5355" tabindex="-1"><a class="header-anchor" href="#_955-\u7684\u516C\u53F8\u540D\u5355" aria-hidden="true">#</a> 955 \u7684\u516C\u53F8\u540D\u5355</h2><ul><li>Afterpay - \u4E0A\u6D77</li><li>Amazon - \u5317\u4EAC/\u4E0A\u6D77</li><li>AMD - \u4E0A\u6D77</li><li>ARM - \u4E0A\u6D77</li><li>Airbnb - \u5317\u4EAC</li><li>Apple - \u5317\u4EAC/\u4E0A\u6D77</li><li>ArcSoft - \u676D\u5DDE</li><li>Autodesk - \u5317\u4EAC/\u4E0A\u6D77</li></ul><p>-Booking - \u4E0A\u6D77</p><ul><li>Calix - \u5357\u4EAC</li><li>Citrix - \u5357\u4EAC</li><li>Cisco - \u5317\u4EAC/\u4E0A\u6D77/\u676D\u5DDE/\u82CF\u5DDE</li><li>Coolapk (\u9177\u5B89) - \u5317\u4EAC/\u6DF1\u5733</li><li>Coupang - \u5317\u4EAC/\u4E0A\u6D77</li><li>CSTC (\u82B1\u65D7\u91D1\u878D) - \u4E0A\u6D77</li><li>Dell - \u4E0A\u6D77</li><li>Douban (\u8C46\u74E3) - \u5317\u4EAC</li><li>eBay - \u4E0A\u6D77</li><li>eHealth - \u53A6\u95E8</li><li>Electronic Arts - \u4E0A\u6D77</li><li>EMC - \u4E0A\u6D77</li><li>Ericsson - \u4E0A\u6D77</li><li>Flexport - \u4E0A\u6D77/\u6DF1\u5733</li><li>FreeWheel - \u5317\u4EAC</li><li>GE - \u4E0A\u6D77</li><li>Google - \u5317\u4EAC/\u4E0A\u6D77</li><li>Grab - \u5317\u4EAC</li><li>Honeywell - \u4E0A\u6D77</li><li>HP - \u4E0A\u6D77</li><li>HSBC - \u4E0A\u6D77/\u5E7F\u5DDE/\u897F\u5B89</li><li>Hulu - \u5317\u4EAC</li><li>IBM (GBS\u9664\u5916) - \u4E0A\u6D77</li><li>iHerb - \u4E0A\u6D77</li><li>Intel - \u4E0A\u6D77/\u6DF1\u5733</li><li>LeetCode - \u4E0A\u6D77</li><li>Linkedin - \u5317\u4EAC</li><li>Micro Focus - \u4E0A\u6D77</li><li>Microsoft - \u5317\u4EAC/\u4E0A\u6D77/\u82CF\u5DDE</li><li>MicroStrategy - \u676D\u5DDE</li><li>National Instruments - \u4E0A\u6D77</li><li>Nokia - \u5357\u4EAC/\u676D\u5DDE</li><li>NVIDIA - \u5317\u4EAC/\u4E0A\u6D77</li><li>Oracle - \u4E0A\u6D77</li><li>PayPal - \u4E0A\u6D77</li><li>Pivotal - \u5317\u4EAC/\u4E0A\u6D77</li><li>Qualcomm - \u5317\u4EAC/\u4E0A\u6D77</li><li>Red Hat - \u5317\u4EAC/\u4E0A\u6D77/\u6DF1\u5733/\u897F\u5B89/remote</li><li>RingCentral - \u53A6\u95E8/\u676D\u5DDE/\u9999\u6E2F</li><li>SAP - \u4E0A\u6D77</li><li>Shopee - \u5317\u4EAC/\u4E0A\u6D77/\u6DF1\u5733</li><li>SmartNews - \u5317\u4EAC/\u4E0A\u6D77</li><li>Snap - \u5317\u4EAC/\u6DF1\u5733</li><li>State Street - \u676D\u5DDE</li><li>SUSE - \u5317\u4EAC/\u4E0A\u6D77/\u6DF1\u5733</li><li>ThoughtWorks - \u897F\u5B89/\u5317\u4EAC/\u6DF1\u5733/\u6210\u90FD/\u6B66\u6C49/\u4E0A\u6D77/\u9999\u6E2F</li><li>Trend Micro - \u5357\u4EAC</li><li>TuSimple - \u5317\u4EAC/\u4E0A\u6D77</li><li>Ubisoft - \u4E0A\u6D77</li><li>Unity - \u4E0A\u6D77</li><li>Vipshop (\u552F\u54C1\u4F1A) - \u4E0A\u6D77</li><li>VMware - \u5317\u4EAC/\u4E0A\u6D77</li><li>WeWork - \u4E0A\u6D77</li><li>Wish - \u4E0A\u6D77</li><li>Works Applications - \u4E0A\u6D77</li><li>XMind - \u6DF1\u5733</li><li>Zhihu (\u77E5\u4E4E) - \u5317\u4EAC</li><li>Zoom - \u5408\u80A5/\u676D\u5DDE/\u82CF\u5DDE</li></ul><blockquote><p>\u826F\u597D\u7684\u884C\u4E1A\u98CE\u6C14\u6709\u52A9\u4E8E\u5404\u4F4D\u540C\u884C\u53D1\u5C55\uFF0C\u4E3A\u8FD9\u7C7B\u4F01\u4E1A\u70B9\u8D5E\uFF01</p></blockquote><p><img src="https://mmbiz.qpic.cn/mmbiz_jpg/icmWrEONNM8XatxbCxk8v6frsbtPJg9XAicBOPflHOdlPYtCcNFmPqnB4iafDDXYuria2Bcib0noeyUiayxgPXbI8Y7g/640?wx_fmt=jpeg" alt=""></p><p>\u4F60\u597D\uFF0C\u6211\u662F\u516C\u5B50\u9F99\uFF0C\u6BD5\u4E1A\u4E8E\u4E2D\u79D1\u9662\uFF0C\u524D\u5927\u578B\u8BA1\u7B97\u673A\u7ADE\u8D5B\u51A0\u519B\uFF0C\u73B0\u5927\u5382\u5DE5\u7A0B\u5E08\uFF0C\u62FF\u8FC7\u4E5D\u5BB6\u5927\u5382\u7684 offer \u3002</p>',13),d=l("\u5317\u6F02\u4E03\u5E74\uFF0C\u4ECE\u5C0F\u767D\u5230\u8BA1\u7B97\u673A\u7ADE\u8D5B\u51A0\u519B\uFF0C\u8BFB\u7814\u65F6\u901A\u8FC7\u5B9E\u4E60\u548C\u6BD4\u8D5B\u6536\u5165 50 \u4E07\uFF0C"),u={href:"http://mp.weixin.qq.com/s?__biz=MzIzNTI3MTQxMg==&mid=2652539525&idx=1&sn=800a2b635fcc59813f9e7948b97fc636&chksm=f3078f1ec4700608579e837cdf4da7d30f41e24a68f8e14f585f662d673d0108218d92b751ec&scene=21#wechat_redirect",target:"_blank",rel:"noopener noreferrer"},h=i("strong",null,"\u70B9\u51FB\u84DD\u5B57\u67E5\u770B\u6211\u7684\u7F16\u7A0B\u4E4B\u8DEF",-1),m=l("\u3002"),_=i("p",null,"\u540C\u65F6\uFF0C\u6211\u4E5F\u662F b \u7AD9 up \u4E3B\uFF1A\u516C\u5B50\u9F99\u9F99\u9F99\uFF0C\u65E5\u5E38\u5206\u4EAB\u9AD8\u8D28\u91CF\u8D44\u6599\uFF0C\u8F93\u51FA\u9762\u8BD5\u3001\u5DE5\u4F5C\u7ECF\u9A8C\uFF0C\u6B22\u8FCE\u56F4\u89C2\u3002",-1),b=i("p",null,[i("img",{src:"https://mmbiz.qpic.cn/mmbiz_png/icmWrEONNM8XatxbCxk8v6frsbtPJg9XAEVdujF0Q5RsAL2v6rvNnGOcP32BAGyENsia2oTib89vlWK8Cg5IqJUZw/640?wx_fmt=png",alt:""})],-1);function f(g,x){const e=o("ExternalLinkIcon");return n(),a("div",null,[p,i("p",null,[d,i("a",u,[h,m,r(e)])]),_,b])}var C=t(s,[["render",f],["__file","weixin-zuixinbujiabandigongsimingdan.html.vue"]]);export{C as default};
diff --git a/dist/assets/what-happen-when-javac.html.a3ce0b44.js b/dist/assets/what-happen-when-javac.html.a24cf79e.js
similarity index 99%
rename from dist/assets/what-happen-when-javac.html.a3ce0b44.js
rename to dist/assets/what-happen-when-javac.html.a24cf79e.js
index 91ebcdcd..9c61004e 100644
--- a/dist/assets/what-happen-when-javac.html.a3ce0b44.js
+++ b/dist/assets/what-happen-when-javac.html.a24cf79e.js
@@ -1,4 +1,4 @@
-import{_ as i}from"./plugin-vue_export-helper.21dcd24c.js";import{r as l,o as c,c as o,a,b as e,d as n,e as t}from"./app.a0271b9c.js";const p={},r=a("h1",{id:"java\u7A0B\u5E8F\u5728\u7F16\u8BD1\u671F\u53D1\u751F\u4E86\u4EC0\u4E48",tabindex:"-1"},[a("a",{class:"header-anchor",href:"#java\u7A0B\u5E8F\u5728\u7F16\u8BD1\u671F\u53D1\u751F\u4E86\u4EC0\u4E48","aria-hidden":"true"},"#"),n(" Java\u7A0B\u5E8F\u5728\u7F16\u8BD1\u671F\u53D1\u751F\u4E86\u4EC0\u4E48\uFF1F")],-1),v=n("\u201C\u4E8C\u54E5\uFF0C\u770B\u4E86\u4E0A\u4E00\u7BC7 "),d={href:"https://mp.weixin.qq.com/s/191I_2CVOxVuyfLVtb4jhg",target:"_blank",rel:"noopener noreferrer"},u=n("Hello World"),m=n(" \u7684\u7A0B\u5E8F\u540E\uFF0C\u6211\u5F88\u597D\u5947\uFF0C\u5B83\u662F\u600E\u4E48\u5728 Run \u9762\u677F\u91CC\u6253\u5370\u51FA\u2018\u4E09\u59B9\uFF0C\u5C11\u770B\u624B\u673A\u5C11\u6253\u6E38\u620F\uFF0C\u597D\u597D\u5B66\uFF0C\u7F8E\u7F8E\u54D2\u2019\u5462\uFF1F\u201D\u4E09\u59B9\u54AA\u4E86\u4E00\u53E3\u9EA6\u9999\u53EF\u53EF\u5976\u8336\u540E\u5BF9\u6211\u8BF4\u3002"),b=t(`<p>\u201C\u4E09\u59B9\uFF0C\u6211\u4EEC\u901A\u5E38\u628A Java \u5206\u4E3A\u7F16\u8BD1\u671F\u548C\u8FD0\u884C\u65F6\uFF0C\u5F04\u6E05\u695A\u8FD9\u4E24\u4E2A\u9636\u6BB5\u5C31\u77E5\u9053\u539F\u56E0\u4E86\u3002\u7531\u4E8E\u8FD0\u884C\u65F6\u6D89\u53CA\u5230\u7684\u5185\u5BB9\u6BD4\u8F83\u591A\uFF0C\u8FD9\u7BC7\u6587\u7AE0\u6211\u4EEC\u5148\u6765\u8BF4\u8BF4\u7F16\u8BD1\u671F\uFF0C\u968F\u540E\u6211\u4EEC\u518D\u6765\u5206\u6790\u8FD0\u884C\u65F6\u3002\u201D</p><p>\u8D34\u4E00\u4E0B HelloWorld \u8FD9\u6BB5\u4EE3\u7801\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token doc-comment comment">/**
+import{_ as i}from"./plugin-vue_export-helper.21dcd24c.js";import{r as l,o as c,c as o,a,b as e,d as n,e as t}from"./app.615e41d8.js";const p={},r=a("h1",{id:"java\u7A0B\u5E8F\u5728\u7F16\u8BD1\u671F\u53D1\u751F\u4E86\u4EC0\u4E48",tabindex:"-1"},[a("a",{class:"header-anchor",href:"#java\u7A0B\u5E8F\u5728\u7F16\u8BD1\u671F\u53D1\u751F\u4E86\u4EC0\u4E48","aria-hidden":"true"},"#"),n(" Java\u7A0B\u5E8F\u5728\u7F16\u8BD1\u671F\u53D1\u751F\u4E86\u4EC0\u4E48\uFF1F")],-1),v=n("\u201C\u4E8C\u54E5\uFF0C\u770B\u4E86\u4E0A\u4E00\u7BC7 "),d={href:"https://mp.weixin.qq.com/s/191I_2CVOxVuyfLVtb4jhg",target:"_blank",rel:"noopener noreferrer"},u=n("Hello World"),m=n(" \u7684\u7A0B\u5E8F\u540E\uFF0C\u6211\u5F88\u597D\u5947\uFF0C\u5B83\u662F\u600E\u4E48\u5728 Run \u9762\u677F\u91CC\u6253\u5370\u51FA\u2018\u4E09\u59B9\uFF0C\u5C11\u770B\u624B\u673A\u5C11\u6253\u6E38\u620F\uFF0C\u597D\u597D\u5B66\uFF0C\u7F8E\u7F8E\u54D2\u2019\u5462\uFF1F\u201D\u4E09\u59B9\u54AA\u4E86\u4E00\u53E3\u9EA6\u9999\u53EF\u53EF\u5976\u8336\u540E\u5BF9\u6211\u8BF4\u3002"),b=t(`<p>\u201C\u4E09\u59B9\uFF0C\u6211\u4EEC\u901A\u5E38\u628A Java \u5206\u4E3A\u7F16\u8BD1\u671F\u548C\u8FD0\u884C\u65F6\uFF0C\u5F04\u6E05\u695A\u8FD9\u4E24\u4E2A\u9636\u6BB5\u5C31\u77E5\u9053\u539F\u56E0\u4E86\u3002\u7531\u4E8E\u8FD0\u884C\u65F6\u6D89\u53CA\u5230\u7684\u5185\u5BB9\u6BD4\u8F83\u591A\uFF0C\u8FD9\u7BC7\u6587\u7AE0\u6211\u4EEC\u5148\u6765\u8BF4\u8BF4\u7F16\u8BD1\u671F\uFF0C\u968F\u540E\u6211\u4EEC\u518D\u6765\u5206\u6790\u8FD0\u884C\u65F6\u3002\u201D</p><p>\u8D34\u4E00\u4E0B HelloWorld \u8FD9\u6BB5\u4EE3\u7801\uFF1A</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token doc-comment comment">/**
  * <span class="token keyword">@author</span> \u5FAE\u4FE1\u641C\u300C\u6C89\u9ED8\u738B\u4E8C\u300D\uFF0C\u56DE\u590D\u5173\u952E\u5B57 PDF
  */</span>
 <span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">HelloWorld</span> <span class="token punctuation">{</span>
diff --git a/dist/assets/what-is-java.html.e968650c.js b/dist/assets/what-is-java.html.efbb701f.js
similarity index 99%
rename from dist/assets/what-is-java.html.e968650c.js
rename to dist/assets/what-is-java.html.efbb701f.js
index f212d87a..04c9f894 100644
--- a/dist/assets/what-is-java.html.e968650c.js
+++ b/dist/assets/what-is-java.html.efbb701f.js
@@ -1,4 +1,4 @@
-import{_ as a}from"./plugin-vue_export-helper.21dcd24c.js";import{o as p,c as e,e as n}from"./app.a0271b9c.js";const t={},s=n(`<h1 id="\u4EC0\u4E48\u662Fjava" tabindex="-1"><a class="header-anchor" href="#\u4EC0\u4E48\u662Fjava" aria-hidden="true">#</a> \u4EC0\u4E48\u662FJava\uFF1F</h1><h2 id="_01\u3001\u4EC0\u4E48\u662F-java" tabindex="-1"><a class="header-anchor" href="#_01\u3001\u4EC0\u4E48\u662F-java" aria-hidden="true">#</a> 01\u3001\u4EC0\u4E48\u662F Java\uFF1F</h2><p>\u201C\u4E8C\u54E5\uFF0C\u5230\u5E95\u4EC0\u4E48\u662F Java\uFF1F\u7ED9\u6211\u8BF4\u8BF4\u5457\u3002\u201D</p><p>\u201C\u4E09\u59B9\u554A\uFF0C\u8FD9\u5C31\u76F4\u5954\u4E3B\u9898\u4E86\u554A\uFF0C\u5148\u53BB\u7ED9\u54E5\u4E70\u5305\u70DF\u5427\uFF0C\u54E5\u5148\u8003\u9A8C\u8003\u9A8C\u4F60\u7684\u8BDA\u5FC3\u3002\u201D</p><p>\uFF08\u4E94\u5206\u949F\u8FC7\u540E\uFF09</p><p>\u201C\u4E09\u59B9\u554A\uFF0C\u4F60\u600E\u4E48\u8FD8\u4E0D\u53BB\uFF1F\u201D</p><p>\u201C\u4E8C\u54E5\uFF0C\u638F\u94B1\u554A\u3002\u201D</p><p>\uFF08\u771F\u5B9E\u4EB2\u59B9\u5B50\u554A\uFF0C\u4E70\u5305\u70DF\u8FD8\u5F97\u6211\u638F\u94B1\uFF0C\u5173\u952E\u662F\u8FD8\u5F97\u7ED9\u8DD1\u817F\u8D39\u3002\u5341\u5206\u949F\u540E\uFF0C\u4E09\u59B9\u4ECE\u697C\u4E0B\u5C0F\u5356\u90E8\u4E70\u4E86\u4E00\u5305\u718A\u732B\u56DE\u6765\u4E86\uFF0C\u6211\u7528 Zippo \u706B\u673A\u70B9\u4E86\u4E00\u652F\u2014\u2014\u8FD9\u706B\u673A\u662F 21 \u5C81\u751F\u65E5\u7684\u65F6\u5019\u521D\u604B\u5973\u53CB\u9001\u6211\u7684\uFF0C\u8D28\u91CF\u786E\u5B9E\u4E0D\u9519\uFF0C\u73B0\u5728\u8FD8\u5728\u7528\u3002\uFF09</p><p>\u201C\u4E09\u59B9\u554A\uFF0C\u542C\u6211\u6162\u6162\u6765\u7ED9\u4F60\u89E3\u91CA\u3002\u201D</p><p>Java \u662F\u4E00\u95E8\u8BA1\u7B97\u673A\u7F16\u7A0B\u8BED\u8A00\uFF0C\u9AD8\u7EA7\u3001\u5065\u58EE\u3001\u9762\u5411\u5BF9\u8C61\uFF0C\u5E76\u4E14\u975E\u5E38\u5B89\u5168\u3002\u5B83\u7531 Sun \u516C\u53F8\u5728 1995 \u5E74\u5F00\u53D1\uFF0C\u4E3B\u529B\u5F00\u53D1\u53EB James Gosling\uFF0C\u88AB\u79F0\u4E3A Java \u4E4B\u7236\uFF0C\u5C31\u662F\u4E0B\u56FE\u8FD9\u4F4D\uFF0C\u5934\u79C3\u7684\u5389\u5BB3\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/overview/one-01.png" alt=""></p><p>\u201C\u4E09\u59B9\u554A\uFF0C\u4F60\u8981\u4E0D\u8981\u518D\u8003\u8651\u8003\u8651\uFF1F\u505A\u7A0B\u5E8F\u5458\u4E0D\u5BB9\u6613\u554A\u201D</p><p>\u201C\u4E8C\u54E5\uFF0C\u4F60\u548B\u6CA1\u6709\u79C3\u5462\uFF1F\u662F\u56E0\u4E3A\u4F60\u4E0D\u591F\u5389\u5BB3\u5417\uFF1F\u201D</p><p>\uFF08\u8FD9\u5B69\u5B50\uFF0C\u5634\u548B\u8FD9\u4E48\u635F\u5462\uFF1F\uFF09</p><p>Java \u5728\u53EB\u201CJava\u201D\u4E4B\u524D\uFF0C\u5176\u5B9E\u53EB Oak\uFF08\u6A61\u6811\u7684\u610F\u601D\uFF0C\u6211\u611F\u89C9\u597D\u50CF\u6BD4 Java \u597D\u542C\u4E00\u4E9B\uFF09\u3002\u600E\u4E48\u60F3\u5230\u5462\uFF1FJames Gosling \u5750\u5728\u529E\u516C\u5BA4\uFF0C\u671B\u5411\u7A97\u5916\uFF0C\u89C6\u91CE\u91CC\u51FA\u73B0\u4E86\u4E00\u9897\u6A61\u6811\u3002\u4E0D\u8FC7\uFF0C\u9057\u61BE\u7684\u662F\uFF0COak \u5DF2\u7ECF\u88AB \u53E6\u5916\u4E00\u5BB6\u516C\u53F8\u6CE8\u518C\u4E86\uFF0C\u56E0\u6B64 1995 \u5E74 5 \u6708 23 \u65E5\uFF0COak \u8BED\u8A00\u6539\u540D\u4E3A Java\u3002</p><p>Java \u8D77\u521D\u5E76\u4E0D\u662F James Gosling \u7684\u9996\u9009\uFF0C\u4E5F\u4E0D\u662F\u547D\u540D\u56E2\u961F\u7684\u9996\u9009\u3002\u56E2\u961F\u5176\u4ED6\u4EBA\u5458\u66F4\u9752\u7750 Silk\uFF08\u4E1D\u7EF8\uFF09\uFF0C\u4F46 Gosling \u4E0D\u559C\u6B22\uFF0C\u4ED6\u672C\u4EBA\u559C\u6B22\u7684\u662F Lyric\uFF08\u6292\u60C5\u8BD7\uFF09\uFF0C\u4F46\u6CA1\u901A\u8FC7\u5F8B\u5E08\u8FD9\u4E00\u5173\u3002\u6700\u540E\uFF0C\u6392\u5728\u7B2C\u56DB\u4F4D\u7684\u201CJava\u201D\u8131\u9896\u800C\u51FA\u3002\u662F\u4E0D\u662F\u50CF\u6781\u4E86\u5A74\u513F\u6CA1\u751F\u4E0B\u6765\u4E4B\u524D\uFF0C\u5BB6\u4EBA\u5C31\u7740\u6025\u7740\u8D77\u540D\u7684\u90A3\u79CD\u611F\u89C9\u3002</p><p>James Gosling \u56DE\u5FC6\u8BF4\uFF0C\u201CJava\u201D\u662F\u4E00\u4E2A\u53EB Mark Opperman \u7684\u4EBA\u63D0\u8BAE\u7684\uFF0C\u4ED6\u662F\u5728\u4E00\u5BB6\u5496\u5561\u5E97\u5F97\u5230\u7075\u611F\u7684\uFF0C\u201CJava\u201D\u662F\u5370\u5EA6\u5C3C\u897F\u4E9A\u722A\u54C7\u5C9B\u7684\u82F1\u6587\u540D\uFF0C\u56E0\u751F\u4EA7\u5496\u5561\u800C\u95FB\u540D\u3002</p><p>\u4F7F\u7528\u5341\u516D\u8FDB\u5236\u7F16\u8F91\u5668\u6253\u5F00\u7531 Java \u6E90\u4EE3\u7801\u7F16\u8BD1\u51FA\u7684\u4E8C\u8FDB\u5236\u6587\u4EF6\uFF08.class \u6587\u4EF6\uFF09\uFF0C\u5C31\u53EF\u4EE5\u770B\u5F97\u5230\uFF0C\u6700\u524D\u9762\u7684 8 \u4E2A\u5B57\u7B26\u662F CA FE BA BE\uFF08\u5B9A\u4E49\u6587\u4EF6\u7C7B\u578B\u7684\u9B54\u6570\uFF09\uFF0C\u5373\u8BCD\u7EC4\u201CCAFE BABE\u201D\uFF08\u5496\u5561\u5C4B\u5B9D\u8D1D\uFF09\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/overview/one-02.png" alt=""></p><p>\u201C\u4E8C\u54E5\uFF0C\u80FD\u7ED9\u6211\u5C55\u793A\u4E00\u6BB5 Java \u4EE3\u7801\u5417\uFF1F\u6211\u60F3\u611F\u53D7\u4E00\u4E0B\u3002\u201D</p><p>\u201C\u4E09\u59B9\u554A\uFF0C\u9A6C\u4E0A\u5C31\u6765\u3002\u201D</p><p>\uFF08\u6211\u567C\u91CC\u556A\u5566\u4E00\u9635\u5728\u952E\u76D8\u4E0A\u4E00\u9635\u72C2\u6309\uFF09</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">HelloWorld</span> <span class="token punctuation">{</span>
+import{_ as a}from"./plugin-vue_export-helper.21dcd24c.js";import{o as p,c as e,e as n}from"./app.615e41d8.js";const t={},s=n(`<h1 id="\u4EC0\u4E48\u662Fjava" tabindex="-1"><a class="header-anchor" href="#\u4EC0\u4E48\u662Fjava" aria-hidden="true">#</a> \u4EC0\u4E48\u662FJava\uFF1F</h1><h2 id="_01\u3001\u4EC0\u4E48\u662F-java" tabindex="-1"><a class="header-anchor" href="#_01\u3001\u4EC0\u4E48\u662F-java" aria-hidden="true">#</a> 01\u3001\u4EC0\u4E48\u662F Java\uFF1F</h2><p>\u201C\u4E8C\u54E5\uFF0C\u5230\u5E95\u4EC0\u4E48\u662F Java\uFF1F\u7ED9\u6211\u8BF4\u8BF4\u5457\u3002\u201D</p><p>\u201C\u4E09\u59B9\u554A\uFF0C\u8FD9\u5C31\u76F4\u5954\u4E3B\u9898\u4E86\u554A\uFF0C\u5148\u53BB\u7ED9\u54E5\u4E70\u5305\u70DF\u5427\uFF0C\u54E5\u5148\u8003\u9A8C\u8003\u9A8C\u4F60\u7684\u8BDA\u5FC3\u3002\u201D</p><p>\uFF08\u4E94\u5206\u949F\u8FC7\u540E\uFF09</p><p>\u201C\u4E09\u59B9\u554A\uFF0C\u4F60\u600E\u4E48\u8FD8\u4E0D\u53BB\uFF1F\u201D</p><p>\u201C\u4E8C\u54E5\uFF0C\u638F\u94B1\u554A\u3002\u201D</p><p>\uFF08\u771F\u5B9E\u4EB2\u59B9\u5B50\u554A\uFF0C\u4E70\u5305\u70DF\u8FD8\u5F97\u6211\u638F\u94B1\uFF0C\u5173\u952E\u662F\u8FD8\u5F97\u7ED9\u8DD1\u817F\u8D39\u3002\u5341\u5206\u949F\u540E\uFF0C\u4E09\u59B9\u4ECE\u697C\u4E0B\u5C0F\u5356\u90E8\u4E70\u4E86\u4E00\u5305\u718A\u732B\u56DE\u6765\u4E86\uFF0C\u6211\u7528 Zippo \u706B\u673A\u70B9\u4E86\u4E00\u652F\u2014\u2014\u8FD9\u706B\u673A\u662F 21 \u5C81\u751F\u65E5\u7684\u65F6\u5019\u521D\u604B\u5973\u53CB\u9001\u6211\u7684\uFF0C\u8D28\u91CF\u786E\u5B9E\u4E0D\u9519\uFF0C\u73B0\u5728\u8FD8\u5728\u7528\u3002\uFF09</p><p>\u201C\u4E09\u59B9\u554A\uFF0C\u542C\u6211\u6162\u6162\u6765\u7ED9\u4F60\u89E3\u91CA\u3002\u201D</p><p>Java \u662F\u4E00\u95E8\u8BA1\u7B97\u673A\u7F16\u7A0B\u8BED\u8A00\uFF0C\u9AD8\u7EA7\u3001\u5065\u58EE\u3001\u9762\u5411\u5BF9\u8C61\uFF0C\u5E76\u4E14\u975E\u5E38\u5B89\u5168\u3002\u5B83\u7531 Sun \u516C\u53F8\u5728 1995 \u5E74\u5F00\u53D1\uFF0C\u4E3B\u529B\u5F00\u53D1\u53EB James Gosling\uFF0C\u88AB\u79F0\u4E3A Java \u4E4B\u7236\uFF0C\u5C31\u662F\u4E0B\u56FE\u8FD9\u4F4D\uFF0C\u5934\u79C3\u7684\u5389\u5BB3\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/overview/one-01.png" alt=""></p><p>\u201C\u4E09\u59B9\u554A\uFF0C\u4F60\u8981\u4E0D\u8981\u518D\u8003\u8651\u8003\u8651\uFF1F\u505A\u7A0B\u5E8F\u5458\u4E0D\u5BB9\u6613\u554A\u201D</p><p>\u201C\u4E8C\u54E5\uFF0C\u4F60\u548B\u6CA1\u6709\u79C3\u5462\uFF1F\u662F\u56E0\u4E3A\u4F60\u4E0D\u591F\u5389\u5BB3\u5417\uFF1F\u201D</p><p>\uFF08\u8FD9\u5B69\u5B50\uFF0C\u5634\u548B\u8FD9\u4E48\u635F\u5462\uFF1F\uFF09</p><p>Java \u5728\u53EB\u201CJava\u201D\u4E4B\u524D\uFF0C\u5176\u5B9E\u53EB Oak\uFF08\u6A61\u6811\u7684\u610F\u601D\uFF0C\u6211\u611F\u89C9\u597D\u50CF\u6BD4 Java \u597D\u542C\u4E00\u4E9B\uFF09\u3002\u600E\u4E48\u60F3\u5230\u5462\uFF1FJames Gosling \u5750\u5728\u529E\u516C\u5BA4\uFF0C\u671B\u5411\u7A97\u5916\uFF0C\u89C6\u91CE\u91CC\u51FA\u73B0\u4E86\u4E00\u9897\u6A61\u6811\u3002\u4E0D\u8FC7\uFF0C\u9057\u61BE\u7684\u662F\uFF0COak \u5DF2\u7ECF\u88AB \u53E6\u5916\u4E00\u5BB6\u516C\u53F8\u6CE8\u518C\u4E86\uFF0C\u56E0\u6B64 1995 \u5E74 5 \u6708 23 \u65E5\uFF0COak \u8BED\u8A00\u6539\u540D\u4E3A Java\u3002</p><p>Java \u8D77\u521D\u5E76\u4E0D\u662F James Gosling \u7684\u9996\u9009\uFF0C\u4E5F\u4E0D\u662F\u547D\u540D\u56E2\u961F\u7684\u9996\u9009\u3002\u56E2\u961F\u5176\u4ED6\u4EBA\u5458\u66F4\u9752\u7750 Silk\uFF08\u4E1D\u7EF8\uFF09\uFF0C\u4F46 Gosling \u4E0D\u559C\u6B22\uFF0C\u4ED6\u672C\u4EBA\u559C\u6B22\u7684\u662F Lyric\uFF08\u6292\u60C5\u8BD7\uFF09\uFF0C\u4F46\u6CA1\u901A\u8FC7\u5F8B\u5E08\u8FD9\u4E00\u5173\u3002\u6700\u540E\uFF0C\u6392\u5728\u7B2C\u56DB\u4F4D\u7684\u201CJava\u201D\u8131\u9896\u800C\u51FA\u3002\u662F\u4E0D\u662F\u50CF\u6781\u4E86\u5A74\u513F\u6CA1\u751F\u4E0B\u6765\u4E4B\u524D\uFF0C\u5BB6\u4EBA\u5C31\u7740\u6025\u7740\u8D77\u540D\u7684\u90A3\u79CD\u611F\u89C9\u3002</p><p>James Gosling \u56DE\u5FC6\u8BF4\uFF0C\u201CJava\u201D\u662F\u4E00\u4E2A\u53EB Mark Opperman \u7684\u4EBA\u63D0\u8BAE\u7684\uFF0C\u4ED6\u662F\u5728\u4E00\u5BB6\u5496\u5561\u5E97\u5F97\u5230\u7075\u611F\u7684\uFF0C\u201CJava\u201D\u662F\u5370\u5EA6\u5C3C\u897F\u4E9A\u722A\u54C7\u5C9B\u7684\u82F1\u6587\u540D\uFF0C\u56E0\u751F\u4EA7\u5496\u5561\u800C\u95FB\u540D\u3002</p><p>\u4F7F\u7528\u5341\u516D\u8FDB\u5236\u7F16\u8F91\u5668\u6253\u5F00\u7531 Java \u6E90\u4EE3\u7801\u7F16\u8BD1\u51FA\u7684\u4E8C\u8FDB\u5236\u6587\u4EF6\uFF08.class \u6587\u4EF6\uFF09\uFF0C\u5C31\u53EF\u4EE5\u770B\u5F97\u5230\uFF0C\u6700\u524D\u9762\u7684 8 \u4E2A\u5B57\u7B26\u662F CA FE BA BE\uFF08\u5B9A\u4E49\u6587\u4EF6\u7C7B\u578B\u7684\u9B54\u6570\uFF09\uFF0C\u5373\u8BCD\u7EC4\u201CCAFE BABE\u201D\uFF08\u5496\u5561\u5C4B\u5B9D\u8D1D\uFF09\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/overview/one-02.png" alt=""></p><p>\u201C\u4E8C\u54E5\uFF0C\u80FD\u7ED9\u6211\u5C55\u793A\u4E00\u6BB5 Java \u4EE3\u7801\u5417\uFF1F\u6211\u60F3\u611F\u53D7\u4E00\u4E0B\u3002\u201D</p><p>\u201C\u4E09\u59B9\u554A\uFF0C\u9A6C\u4E0A\u5C31\u6765\u3002\u201D</p><p>\uFF08\u6211\u567C\u91CC\u556A\u5566\u4E00\u9635\u5728\u952E\u76D8\u4E0A\u4E00\u9635\u72C2\u6309\uFF09</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">HelloWorld</span> <span class="token punctuation">{</span>
     <span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">void</span> <span class="token function">main</span><span class="token punctuation">(</span><span class="token class-name">String</span><span class="token punctuation">[</span><span class="token punctuation">]</span> args<span class="token punctuation">)</span> <span class="token punctuation">{</span>
         <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">&quot;Hello World&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
     <span class="token punctuation">}</span>
diff --git a/dist/assets/what-is-jvm.html.0a353155.js b/dist/assets/what-is-jvm.html.3177cd0e.js
similarity index 99%
rename from dist/assets/what-is-jvm.html.0a353155.js
rename to dist/assets/what-is-jvm.html.3177cd0e.js
index 5453f2d2..bb5a8d3f 100644
--- a/dist/assets/what-is-jvm.html.0a353155.js
+++ b/dist/assets/what-is-jvm.html.3177cd0e.js
@@ -1,4 +1,4 @@
-import{_ as p}from"./plugin-vue_export-helper.21dcd24c.js";import{r as o,o as l,c as i,a,b as e,d as n,e as t}from"./app.a0271b9c.js";const c={},r=a("h1",{id:"jvm\u5230\u5E95\u662F\u4EC0\u4E48",tabindex:"-1"},[a("a",{class:"header-anchor",href:"#jvm\u5230\u5E95\u662F\u4EC0\u4E48","aria-hidden":"true"},"#"),n(" JVM\u5230\u5E95\u662F\u4EC0\u4E48\uFF1F")],-1),d=a("p",null,"\u201C\u4E8C\u54E5\uFF0C\u4E4B\u524D\u7684\u6587\u7AE0\u91CC\u63D0\u5230 JVM\uFF0C\u8BF4\u5B9E\u5728\u7684\uFF0C \u6211\u8FD8\u4E0D\u77E5\u9053\u5B83\u5230\u5E95\u662F\u5E72\u561B\u7684\uFF0C\u4F60\u80FD\u7ED9\u6211\u666E\u53CA\u4E00\u4E0B\u5417\uFF1F\u201D\u4E09\u59B9\u54AA\u4E86\u4E00\u53E3\u9EA6\u9999\u53EF\u53EF\u5976\u8336\u540E\u5BF9\u6211\u8BF4\u3002",-1),u=a("p",null,"\u201C\u4E09\u59B9\uFF0C\u4E0D\u8981\u62C5\u5FC3\uFF0C\u8FD9\u7BC7\u6587\u7AE0\u6765\u5E26\u4F60\u8BA4\u8BC6\u4E00\u4E0B\u4EC0\u4E48\u662F JVM\uFF0C\u8FD9\u4E5F\u662F Java \u4E2D\u975E\u5E38\u91CD\u8981\u7684\u4E00\u5757\u77E5\u8BC6\uFF0C\u6BCF\u4E2A\u7A0B\u5E8F\u5458\u90FD\u5E94\u8BE5\u4E86\u89E3\u7684\u3002\u201D\u8BF4\u5B8C\u6700\u540E\u8FD9\u53E5\u8BDD\uFF0C\u6211\u8138\u4E0A\u5FCD\u4E0D\u4F4F\u6CDB\u8D77\u4E86\u4E00\u9635\u7F9E\u6DA9\u7684\u7EA2\u6655\u3002",-1),v=n("\u770B\u8FC7\u300A"),m={href:"https://mp.weixin.qq.com/s/Ctouw652iC0qtrmjen9aEw",target:"_blank",rel:"noopener noreferrer"},k=n("Java \u53D1\u5C55\u7B80\u53F2"),J=n("\u300B\u7684\u5C0F\u4F19\u4F34\u5E94\u8BE5\u77E5\u9053\uFF0CSun \u5728 1991 \u5E74\u6210\u7ACB\u4E86\u4E00\u4E2A\u7531\u8A79\u59C6\u65AF\xB7\u9AD8\u65AF\u6797\uFF08James Gosling\uFF09\u9886\u5BFC\u7684\uFF0C\u540D\u4E3A\u201CGreen\u201D\u7684\u9879\u76EE\u7EC4\uFF0C\u76EE\u7684\u662F\u5F00\u53D1\u4E00\u79CD\u80FD\u591F\u5728\u5404\u79CD\u6D88\u8D39\u6027\u7535\u5B50\u4EA7\u54C1\u4E0A\u8FD0\u884C\u7684\u7A0B\u5E8F\u67B6\u6784\u3002"),b=t('<p>\u4E00\u5F00\u59CB\uFF0C\u9879\u76EE\u7EC4\u6253\u7B97\u4F7F\u7528 C++\uFF0C\u4F46 C++ \u65E0\u6CD5\u8FBE\u5230\u8DE8\u5E73\u53F0\u7684\u8981\u6C42\uFF0C\u6BD4\u5982\u5728 Windows \u7CFB\u7EDF\u4E0B\u7F16\u8BD1\u7684 Hello.exe \u65E0\u6CD5\u76F4\u63A5\u62FF\u5230 Linux \u73AF\u5883\u4E0B\u6267\u884C\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/overview/seven-01.png" alt=""></p><p>\u5728\u5F53\u65F6\uFF0CC++ \u5DF2\u7ECF\u975E\u5E38\u6D41\u884C\u4E86\uFF0C\u4F46\u65E0\u6CD5\u8DE8\u5E73\u53F0\uFF0C\u53EA\u80FD\u5FCD\u75DB\u5272\u7231\u4E86\u3002</p><p>\u600E\u4E48\u529E\u5462\uFF1F</p><p>\u4E09\u59B9\u4E0D\u77E5\u9053\u6709\u6CA1\u6709\u542C\u8FC7\u76F4\u8BD1\u5668\uFF08\u89E3\u91CA\u5668\uFF09\u8FD9\u73A9\u610F\uFF1F\uFF08\u4F30\u8BA1\u4F60\u6CA1\u542C\u8FC7\uFF09\u5C31\u662F\u6BCF\u8DD1\u4E00\u884C\u4EE3\u7801\u5C31\u751F\u6210\u673A\u5668\u7801\uFF0C\u7136\u540E\u6267\u884C\uFF0C\u6BD4\u5982\u8BF4 Python \u548C Ruby \u7528\u7684\u5C31\u662F\u76F4\u8BD1\u5668\u3002\u5728\u6BCF\u4E2A\u64CD\u4F5C\u7CFB\u7EDF\u4E0A\u88C5\u4E00\u4E2A\u76F4\u8BD1\u5668\u5C31\u597D\u4E86\uFF0C\u8DE8\u5E73\u53F0\u7684\u76EE\u7684\u5C31\u8FBE\u5230\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/overview/seven-02.png" alt=""></p><p>\u4F46\u76F4\u8BD1\u5668\u6709\u4E2A\u7F3A\u70B9\uFF0C\u5C31\u662F\u6CA1\u6CD5\u50CF\u7F16\u8BD1\u5668\u90A3\u6837\u5BF9\u4E00\u4E9B\u70ED\u70B9\u4EE3\u7801\u8FDB\u884C\u4F18\u5316\uFF0C\u4ECE\u800C\u8BA9\u673A\u5668\u7801\u8DD1\u5F97\u66F4\u5FEB\u4E00\u4E9B\u3002</p><p>\u600E\u4E48\u529E\u5462\uFF1F</p><p>\u6765\u4E2A\u7ED3\u5408\u4F53\u5457\uFF0C\u7F16\u8BD1\u5668\u548C\u76F4\u8BD1\u5668\u4E00\u5757\u4E0A\uFF01</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/overview/seven-03.png" alt=""></p>',10),g=n("\u7F16\u8BD1\u5668\u8D1F\u8D23\u628A Java \u6E90\u4EE3\u7801\u7F16\u8BD1\u6210\u5B57\u8282\u7801\uFF08\u4E0D\u6E05\u695A\u7684\u5C0F\u4F19\u4F34\u53EF\u4EE5\u70B9\u51FB\u94FE\u63A5\u67E5\u770B"),h={href:"https://mp.weixin.qq.com/s/GYDFndO0Q1Nqzcc_Te61gw",target:"_blank",rel:"noopener noreferrer"},M=n("\u4E0A\u4E00\u8282"),_=n("\uFF09\uFF0CJava \u865A\u62DF\u673A\uFF08Java Virtual Machine\uFF0C\u7B80\u79F0 JVM\uFF09 \u8D1F\u8D23\u628A\u5B57\u8282\u7801\u8F6C\u6362\u6210\u673A\u5668\u7801\u3002\u8F6C\u6362\u7684\u65F6\u5019\uFF0C\u53EF\u4EE5\u505A\u4E00\u4E9B\u538B\u7F29\u6216\u8005\u4F18\u5316\uFF0C\u8FD9\u6837\u7684\u673A\u5668\u7801\u8DD1\u8D77\u6765\u5C31\u5FEB\u591A\u4E86\u3002"),V=t(`<p>\u4E0D\u4EC5\u8DE8\u5E73\u53F0\u7684\u76EE\u7684\u8FBE\u5230\u4E86\uFF0C\u800C\u4E14\u6027\u80FD\u5F97\u5230\u4E86\u4F18\u5316\u3002</p><p>\u4E09\u59B9\u662F\u4E0D\u662F\u60F3\u95EE\uFF0C\u201C\u4E3A\u4EC0\u4E48 Java \u865A\u62DF\u673A\u4F1A\u53EB Java \u865A\u62DF\u673A\u5462\uFF1F\u201D</p><p>\u865A\u62DF\u673A\uFF0C\u987E\u540D\u601D\u4E49\uFF0C\u5C31\u662F\u865A\u62DF\u7684\u673A\u5668\uFF08\u591A\u82CD\u767D\u7684\u89E3\u91CA\uFF09\uFF0C\u53CD\u6B63\u5C31\u662F\u770B\u4E0D\u89C1\u6478\u4E0D\u7740\u7684\u673A\u5668\uFF0C\u628A\u5B83\u60F3\u8C61\u6210\u4E00\u4E2A\u4F1A\u6267\u884C\u5B57\u8282\u7801\u7684\u602A\u517D\u5427\u3002</p><p>\u8BB0\u5F97\u4E0A\u5927\u5B66\u90A3\u4F1A\uFF0C\u7531\u4E8E\u6CA1\u6709 Linux \u73AF\u5883\uFF0C\u4F46\u53C8\u9700\u8981\u5728\u4E0A\u9762\u73A9\u4E00\u4E9B\u547D\u4EE4\uFF0C\u4E8E\u662F\u5C31\u5728 Windows \u4E0A\u88C5 Linux \u7684\u865A\u62DF\u673A\uFF0C\u8FD9\u4E2A JVM \u5C31\u7C7B\u4F3C\u8FD9\u79CD\u4E1C\u897F\u3002</p><p>\u8BF4\u767D\u4E86\uFF0C\u5C31\u662F\u6211\u4EEC\u7F16\u5199 Java \u4EE3\u7801\uFF0C\u7F16\u8BD1 Java \u4EE3\u7801\uFF0C\u76EE\u7684\u4E0D\u662F\u8BA9\u5B83\u5728 Linux\u3001Windows \u6216\u8005 MacOS \u4E0A\u8DD1\uFF0C\u800C\u662F\u5728 JVM \u4E0A\u8DD1\u3002</p><p>\u8BF4\u5230\u8FD9\uFF0C\u4E09\u59B9\u662F\u4E0D\u662F\u60F3\u95EE\uFF0C\u201C\u90FD\u6709\u54EA\u4E9B Java \u865A\u62DF\u673A\u5462\uFF1F\u201D\u6765\u770B\u4E0B\u9762\u8FD9\u5F20\u601D\u7EF4\u5BFC\u56FE\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/overview/seven-04.png" alt=""></p><p>\u9664\u4E86\u6211\u4EEC\u7ECF\u5E38\u770B\u5230\uFF0C\u7ECF\u5E38\u542C\u5230\u7684 Hotspot VM\uFF0C\u8FD8\u6709\u5F88\u591A\uFF0C\u4E0B\u9762\u6211\u6765\u7B80\u5355\u4ECB\u7ECD\u4E00\u4E0B\u3002</p><ul><li><p>Sun Classic\uFF1A\u4E16\u754C\u4E0A\u7B2C\u4E00\u6B3E\u5546\u7528 Java \u865A\u62DF\u673A\uFF0C\u4F46\u6267\u884C\u6548\u7387\u4F4E\u4E0B\uFF0C\u5BFC\u81F4 Java \u7A0B\u5E8F\u7684\u6027\u80FD\u548C C/C++ \u5B58\u5728\u5F88\u5927\u5DEE\u8DDD\uFF0C\u56E0\u6B64\u7ED9\u540E\u6765\u8005\u7559\u4E0B\u4E86\u201CJava \u8BED\u8A00\u5F88\u6162\u201D\u7684\u523B\u677F\u5370\u8C61\u3002</p></li><li><p>Exact VM\uFF1A\u4E3A\u4E86\u63D0\u5347 Classic \u7684\u6548\u7387\uFF0CSun \u7684\u865A\u62DF\u673A\u56E2\u961F\u66FE\u5728 Solaris\uFF08Sun \u7814\u53D1\u7684\u4E00\u6B3E\u7C7B\u4F3C Unix \u7684\u64CD\u4F5C\u7CFB\u7EDF\uFF09\u4E0A\u53D1\u5E03\u8FC7\u8FD9\u6B3E\u865A\u62DF\u673A\uFF0C\u5B83\u7684\u6267\u884C\u7CFB\u7EDF\u91CC\u5305\u542B\u6709\u70ED\u70B9\u63A2\u6D4B\u3001\u5373\u65F6\u7F16\u8BD1\u7B49\uFF0C\u4F46\u4E0D\u662F\u5F88\u6210\u719F\u3002</p></li></ul><p>Sun Classic \u5728 JDK 1.4 \u7684\u65F6\u5019\u88AB\u5F7B\u5E95\u629B\u5F03\uFF0C\u800C Exact VM \u88AB\u629B\u5F03\u5F97\u66F4\u65E9\uFF0C\u53D6\u4EE3\u5B83\u7684\u6B63\u662F HotSpot VM\u2014\u2014\u65F6\u4E5F\u547D\u4E5F\u3002</p><ul><li>HotSpot VM\uFF1AOracleJDK\uFF08\u5546\u7528\uFF09\u548C OpenJDK\uFF08\u5F00\u6E90\uFF09\u7684\u9ED8\u8BA4\u865A\u62DF\u673A\uFF0C\u4E5F\u662F\u76EE\u524D\u4F7F\u7528\u6700\u5E7F\u6CDB\u7684 Java \u865A\u62DF\u673A\u3002</li></ul><p>HotSpot \u7684\u6280\u672F\u4F18\u52BF\u5C31\u5728\u4E8E\u70ED\u70B9\u4EE3\u7801\u63A2\u6D4B\u6280\u672F\uFF08\u540D\u5B57\u5C31\u4ECE\u8FD9\u6765\uFF09\u548C\u51C6\u786E\u5F0F\u5185\u5B58\u7BA1\u7406\u6280\u672F\uFF0C\u4F46\u5176\u5B9E\u8FD9\u4E24\u4E2A\u6280\u672F\u5728 Exact VM \u4E2D\u90FD\u6709\u4F53\u73B0\uFF0C\u56E0\u6B64\u4F60\u770B\u8D77\u4E2A\u597D\u7684\u540D\u5B57\u591A\u91CD\u8981\uFF08\u5F00\u73A9\u7B11\u4E86\uFF0C\u8FD9\u5C31\u662F\u547D\uFF09\u3002</p><p>\u70ED\u70B9\u4EE3\u7801\u63A2\u6D4B\uFF0C\u6307\u7684\u662F\uFF0C\u901A\u8FC7\u6267\u884C\u8BA1\u6570\u5668\u627E\u51FA\u6700\u5177\u6709\u7F16\u8BD1\u4EF7\u503C\u7684\u4EE3\u7801\uFF0C\u7136\u540E\u901A\u77E5\u5373\u65F6\u7F16\u8BD1\u5668\u4EE5\u65B9\u6CD5\u4E3A\u5355\u4F4D\u8FDB\u884C\u7F16\u8BD1\uFF0C\u89E3\u91CA\u5668\u5C31\u53EF\u4EE5\u4E0D\u518D\u9010\u884C\u7684\u5C06\u5B57\u8282\u7801\u7FFB\u8BD1\u6210\u673A\u5668\u7801\uFF0C\u800C\u662F\u5C06\u4E00\u6574\u4E2A\u65B9\u6CD5\u7684\u6240\u6709\u5B57\u8282\u7801\u7FFB\u8BD1\u6210\u673A\u5668\u7801\u518D\u6267\u884C\u3002</p><p>\u8FD9\u6837\u7684\u8BDD\uFF0C\u6548\u7387\u5C31\u63D0\u9AD8\u4E86\u5F88\u591A\uFF0C\u5BF9\u5427\uFF1F</p><ul><li><p>Mobile VM\uFF1AJava \u5728\u79FB\u52A8\u624B\u673A\u7AEF\uFF08\u88AB Android \u548C IOS \u4E8C\u5206\u5929\u4E0B\uFF09\u7684\u53D1\u5C55\u5E76\u6CA1\u6709\u90A3\u4E48\u6210\u529F\uFF0C\u56E0\u6B64 Mobile VM \u7684\u58F0\u671B\u503C\u6BD4\u8F83\u4F4E\u3002</p></li><li><p>Embedded VM\uFF1A\u5D4C\u5165\u5F0F\u8BBE\u5907\u4E0A\u7684\u865A\u62DF\u673A\u3002</p></li><li><p>BEA JRockit\uFF1A\u66FE\u7ECF\u53F7\u79F0\u662F\u201C\u4E16\u754C\u4E0A\u6700\u5FEB\u7684 Java \u865A\u62DF\u673A\u201D\uFF0C\u540E\u6765\u88AB Oracle \u6536\u8D2D\u540E\u5C31\u6CA1\u6709\u58F0\u97F3\u4E86\u3002</p></li><li><p>IBM J9 VM\uFF1A\u63D0\u8D77 IBM\uFF0C\u57FA\u672C\u4E0A\u6240\u6709\u7A0B\u5E8F\u5458\u90FD\u77E5\u9053\u4E86\uFF0C\u4E5F\u662F\u4E2A\u5DE8\u5934\uFF0C\u6240\u4EE5\u4ED6\u5BB6\u7684\u865A\u62DF\u673A\u4E5F\u5F88\u5F3A\uFF0C\u5728\u804C\u8D23\u5206\u79BB\u548C\u6A21\u5757\u5316\u4E0A\u505A\u5F97\u6BD4 HotSpot \u66F4\u597D\u3002\u76EE\u524D\u5DF2\u7ECF\u5F00\u6E90\u7ED9 Eclipse \u57FA\u91D1\u4F1A\u3002</p></li><li><p>BEA Liquid VM\uFF1A\u662F BEA \u516C\u53F8\u5F00\u53D1\u7684\u53EF\u4EE5\u76F4\u63A5\u8FD0\u884C\u5728\u81EA\u5BB6\u7CFB\u7EDF\u4E0A\u7684\u865A\u62DF\u673A\uFF0C\u53EF\u4EE5\u8D8A\u8FC7\u64CD\u4F5C\u7CFB\u7EDF\u76F4\u63A5\u548C\u786C\u4EF6\u6253\u4EA4\u9053\uFF0C\u56E0\u6B64\u53EF\u4EE5\u66F4\u5927\u7A0B\u5EA6\u4E0A\u7684\u53D1\u6325\u786C\u4EF6\u7684\u80FD\u529B\u3002\u4E0D\u8FC7\u6838\u5FC3\u7528\u7684\u8FD8\u662F JRockit\uFF0C\u6240\u4EE5\u4F34\u968F\u7740 JRockit \u7684\u6D88\u5931\uFF0CLiquid VM \u4E5F\u9000\u51FA\u5386\u53F2\u821E\u53F0\u4E86\u3002</p></li><li><p>Azul VM\uFF1A\u662F Azul \u516C\u53F8\u5728 HotSpot \u57FA\u7840\u4E0A\u8FDB\u884C\u5927\u91CF\u6539\u8FDB\u540E\u7684\uFF0C\u53EF\u4EE5\u8FD0\u884C\u5728 Azul \u516C\u53F8\u4E13\u6709\u786C\u4EF6\u4E0A\u7684\u865A\u62DF\u673A\u30022010 \u5E74\u8D77\uFF0CAzul \u516C\u53F8\u7684\u91CD\u5FC3\u4ECE\u786C\u4EF6\u8F6C\u79FB\u5230\u8F6F\u4EF6\u4E0A\uFF0C\u5E76\u53D1\u5E03\u4E86 Zing \u865A\u62DF\u673A\uFF0C\u6027\u80FD\u65B9\u9762\u5F88\u5F3A\u5927\u3002</p></li><li><p>Apache Harmony \u548C Google Android Dalvik VM \u5E76\u4E0D\u662F \u4E25\u683C\u610F\u4E49\u4E0A\u7684 Java \u865A\u62DF\u673A\uFF0C\u4F46\u5BF9 Java \u865A\u62DF\u673A\u7684\u53D1\u5C55\u8D77\u5230\u4E86\u5F88\u5927\u7684\u523A\u6FC0\u4F5C\u7528\u3002\u4F46\u5B83\u4EEC\u7EC8\u7A76\u6CA1\u6709\u71AC\u8FC7\u65F6\u95F4\u3002</p></li><li><p>Microsoft JVM\uFF1A\u5728\u65E9\u671F\u7684 Java Applets \u5E74\u4EE3\uFF0C\u5FAE\u8F6F\u4E3A\u4E86\u5728 IE \u4E2D\u652F\u6301 Applets \u5F00\u53D1\u4E86\u81EA\u5DF1\u7684 Java \u865A\u62DF\u673A\u3002\u4F60\u6562\u76F8\u4FE1\uFF1FMicrosoft JVM \u53EA\u6709 Windows \u7248\u672C\uFF0C\u5B83\u4E0E JVM \u5B9E\u73B0\u7684\u201C\u4E00\u6B21\u7F16\u8BD1\uFF0C\u5230\u5904\u8FD0\u884C\u201D\u7684\u7406\u5FF5\u5B8C\u5168\u6CBE\u4E0D\u4E0A\u8FB9\u3002</p></li></ul><p>\u5173\u952E\u662F\uFF0C1997 \u5E74 10 \u6708\uFF0CSun \u516C\u53F8\u56E0\u4E3A\u8FD9\u4E8B\u628A\u5FAE\u8F6F\u544A\u4E86\uFF0C\u6700\u540E\u5FAE\u8F6F\u8D54\u7ED9\u4E86 Sun \u516C\u53F8 2000 \u4E07\u7F8E\u91D1\uFF0C\u5E76\u4E14\u7EC8\u6B62\u4E86\u5728 Java \u865A\u62DF\u673A\u65B9\u9762\u7684\u53D1\u5C55\u3002\u5982\u679C\uFF0C\u6211\u662F\u8BF4\u5982\u679C\uFF0C\u5982\u679C\u5FAE\u8F6F\u4FDD\u6301\u7740\u5BF9 Java \u7684\u70ED\u60C5\uFF0C\u540E\u9762\u8FD8\u6709 .Net \u4EC0\u4E48\u4E8B\uFF1F</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/overview/seven-05.png" alt=""></p><p>\u89E3\u91CA\u4E86\u8FD9\u4E48\u591A Java \u865A\u62DF\u673A\u540E\uFF0C\u4E09\u59B9\u662F\u4E0D\u662F\u60F3\u95EE\uFF0C\u201CJava \u865A\u62DF\u673A\u957F\u4EC0\u4E48\u6837\u5B50\u5462\uFF1F\u201D</p><p>Java \u865A\u62DF\u673A\u867D\u7136\u662F\u865A\u62DF\u7684\uFF0C\u4F46\u5B83\u7684\u5185\u90E8\u662F\u53EF\u4EE5\u5212\u5206\u4E3A\uFF1A</p><ul><li>\u7C7B\u52A0\u8F7D\u5668\uFF08Class Loader\uFF09</li><li>\u8FD0\u884C\u65F6\u6570\u636E\u533A\uFF08Runtime Data Areas\uFF09</li><li>\u6267\u884C\u5F15\u64CE\uFF08Excution Engine\uFF09</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/overview/seven-06.png" alt=""></p><p><strong>1\uFF09\u7C7B\u52A0\u8F7D\u5668</strong></p><p>\u7C7B\u52A0\u8F7D\u5668\u662F Java \u865A\u62DF\u673A\u7684\u4E00\u4E2A\u5B50\u7CFB\u7EDF\uFF0C\u7528\u4E8E\u52A0\u8F7D\u7C7B\u6587\u4EF6\u3002\u6BCF\u5F53\u6211\u4EEC\u8FD0\u884C\u4E00\u4E2A Java \u7A0B\u5E8F\uFF0C\u5B83\u90FD\u4F1A\u7531\u7C7B\u52A0\u8F7D\u5668\u9996\u5148\u52A0\u8F7D\u3002</p><p>\u4E00\u822C\u6765\u8BF4\uFF0CJava \u7A0B\u5E8F\u5458\u5E76\u4E0D\u9700\u8981\u76F4\u63A5\u540C\u7C7B\u52A0\u8F7D\u5668\u8FDB\u884C\u4EA4\u4E92\u3002JVM \u9ED8\u8BA4\u7684\u884C\u4E3A\u5C31\u5DF2\u7ECF\u8DB3\u591F\u6EE1\u8DB3\u5927\u591A\u6570\u60C5\u51B5\u7684\u9700\u6C42\u4E86\u3002\u4E0D\u8FC7\uFF0C\u5982\u679C\u9047\u5230\u4E86\u9700\u8981\u548C\u7C7B\u52A0\u8F7D\u5668\u8FDB\u884C\u4EA4\u4E92\u7684\u60C5\u51B5\uFF0C\u800C\u5BF9\u7C7B\u52A0\u8F7D\u5668\u7684\u673A\u5236\u53C8\u4E0D\u662F\u5F88\u4E86\u89E3\u7684\u8BDD\uFF0C\u5C31\u4E0D\u5F97\u4E0D\u82B1\u5927\u91CF\u7684\u65F6\u95F4\u53BB\u8C03\u8BD5 <code>ClassNotFoundException</code> \u548C <code>NoClassDefFoundError</code> \u7B49\u5F02\u5E38\u3002</p><p>\u5BF9\u4E8E\u4EFB\u610F\u4E00\u4E2A\u7C7B\uFF0C\u90FD\u9700\u8981\u7531\u5B83\u7684\u7C7B\u52A0\u8F7D\u5668\u548C\u8FD9\u4E2A\u7C7B\u672C\u8EAB\u4E00\u540C\u786E\u5B9A\u5176\u5728 JVM \u4E2D\u7684\u552F\u4E00\u6027\u3002\u4E5F\u5C31\u662F\u8BF4\uFF0C\u5982\u679C\u4E24\u4E2A\u7C7B\u7684\u52A0\u8F7D\u5668\u4E0D\u540C\uFF0C\u5373\u4F7F\u4E24\u4E2A\u7C7B\u6765\u6E90\u4E8E\u540C\u4E00\u4E2A\u5B57\u8282\u7801\u6587\u4EF6\uFF0C\u90A3\u8FD9\u4E24\u4E2A\u7C7B\u5C31\u5FC5\u5B9A\u4E0D\u76F8\u7B49\uFF08\u6BD4\u5982\u4E24\u4E2A\u7C7B\u7684 Class \u5BF9\u8C61\u4E0D <code>equals</code>\uFF09\u3002</p><p>\u6765\u901A\u8FC7\u4E00\u6BB5\u7B80\u5355\u7684\u4EE3\u7801\u4E86\u89E3\u4E0B\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token doc-comment comment">/**
+import{_ as p}from"./plugin-vue_export-helper.21dcd24c.js";import{r as o,o as l,c as i,a,b as e,d as n,e as t}from"./app.615e41d8.js";const c={},r=a("h1",{id:"jvm\u5230\u5E95\u662F\u4EC0\u4E48",tabindex:"-1"},[a("a",{class:"header-anchor",href:"#jvm\u5230\u5E95\u662F\u4EC0\u4E48","aria-hidden":"true"},"#"),n(" JVM\u5230\u5E95\u662F\u4EC0\u4E48\uFF1F")],-1),d=a("p",null,"\u201C\u4E8C\u54E5\uFF0C\u4E4B\u524D\u7684\u6587\u7AE0\u91CC\u63D0\u5230 JVM\uFF0C\u8BF4\u5B9E\u5728\u7684\uFF0C \u6211\u8FD8\u4E0D\u77E5\u9053\u5B83\u5230\u5E95\u662F\u5E72\u561B\u7684\uFF0C\u4F60\u80FD\u7ED9\u6211\u666E\u53CA\u4E00\u4E0B\u5417\uFF1F\u201D\u4E09\u59B9\u54AA\u4E86\u4E00\u53E3\u9EA6\u9999\u53EF\u53EF\u5976\u8336\u540E\u5BF9\u6211\u8BF4\u3002",-1),u=a("p",null,"\u201C\u4E09\u59B9\uFF0C\u4E0D\u8981\u62C5\u5FC3\uFF0C\u8FD9\u7BC7\u6587\u7AE0\u6765\u5E26\u4F60\u8BA4\u8BC6\u4E00\u4E0B\u4EC0\u4E48\u662F JVM\uFF0C\u8FD9\u4E5F\u662F Java \u4E2D\u975E\u5E38\u91CD\u8981\u7684\u4E00\u5757\u77E5\u8BC6\uFF0C\u6BCF\u4E2A\u7A0B\u5E8F\u5458\u90FD\u5E94\u8BE5\u4E86\u89E3\u7684\u3002\u201D\u8BF4\u5B8C\u6700\u540E\u8FD9\u53E5\u8BDD\uFF0C\u6211\u8138\u4E0A\u5FCD\u4E0D\u4F4F\u6CDB\u8D77\u4E86\u4E00\u9635\u7F9E\u6DA9\u7684\u7EA2\u6655\u3002",-1),v=n("\u770B\u8FC7\u300A"),m={href:"https://mp.weixin.qq.com/s/Ctouw652iC0qtrmjen9aEw",target:"_blank",rel:"noopener noreferrer"},k=n("Java \u53D1\u5C55\u7B80\u53F2"),J=n("\u300B\u7684\u5C0F\u4F19\u4F34\u5E94\u8BE5\u77E5\u9053\uFF0CSun \u5728 1991 \u5E74\u6210\u7ACB\u4E86\u4E00\u4E2A\u7531\u8A79\u59C6\u65AF\xB7\u9AD8\u65AF\u6797\uFF08James Gosling\uFF09\u9886\u5BFC\u7684\uFF0C\u540D\u4E3A\u201CGreen\u201D\u7684\u9879\u76EE\u7EC4\uFF0C\u76EE\u7684\u662F\u5F00\u53D1\u4E00\u79CD\u80FD\u591F\u5728\u5404\u79CD\u6D88\u8D39\u6027\u7535\u5B50\u4EA7\u54C1\u4E0A\u8FD0\u884C\u7684\u7A0B\u5E8F\u67B6\u6784\u3002"),b=t('<p>\u4E00\u5F00\u59CB\uFF0C\u9879\u76EE\u7EC4\u6253\u7B97\u4F7F\u7528 C++\uFF0C\u4F46 C++ \u65E0\u6CD5\u8FBE\u5230\u8DE8\u5E73\u53F0\u7684\u8981\u6C42\uFF0C\u6BD4\u5982\u5728 Windows \u7CFB\u7EDF\u4E0B\u7F16\u8BD1\u7684 Hello.exe \u65E0\u6CD5\u76F4\u63A5\u62FF\u5230 Linux \u73AF\u5883\u4E0B\u6267\u884C\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/overview/seven-01.png" alt=""></p><p>\u5728\u5F53\u65F6\uFF0CC++ \u5DF2\u7ECF\u975E\u5E38\u6D41\u884C\u4E86\uFF0C\u4F46\u65E0\u6CD5\u8DE8\u5E73\u53F0\uFF0C\u53EA\u80FD\u5FCD\u75DB\u5272\u7231\u4E86\u3002</p><p>\u600E\u4E48\u529E\u5462\uFF1F</p><p>\u4E09\u59B9\u4E0D\u77E5\u9053\u6709\u6CA1\u6709\u542C\u8FC7\u76F4\u8BD1\u5668\uFF08\u89E3\u91CA\u5668\uFF09\u8FD9\u73A9\u610F\uFF1F\uFF08\u4F30\u8BA1\u4F60\u6CA1\u542C\u8FC7\uFF09\u5C31\u662F\u6BCF\u8DD1\u4E00\u884C\u4EE3\u7801\u5C31\u751F\u6210\u673A\u5668\u7801\uFF0C\u7136\u540E\u6267\u884C\uFF0C\u6BD4\u5982\u8BF4 Python \u548C Ruby \u7528\u7684\u5C31\u662F\u76F4\u8BD1\u5668\u3002\u5728\u6BCF\u4E2A\u64CD\u4F5C\u7CFB\u7EDF\u4E0A\u88C5\u4E00\u4E2A\u76F4\u8BD1\u5668\u5C31\u597D\u4E86\uFF0C\u8DE8\u5E73\u53F0\u7684\u76EE\u7684\u5C31\u8FBE\u5230\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/overview/seven-02.png" alt=""></p><p>\u4F46\u76F4\u8BD1\u5668\u6709\u4E2A\u7F3A\u70B9\uFF0C\u5C31\u662F\u6CA1\u6CD5\u50CF\u7F16\u8BD1\u5668\u90A3\u6837\u5BF9\u4E00\u4E9B\u70ED\u70B9\u4EE3\u7801\u8FDB\u884C\u4F18\u5316\uFF0C\u4ECE\u800C\u8BA9\u673A\u5668\u7801\u8DD1\u5F97\u66F4\u5FEB\u4E00\u4E9B\u3002</p><p>\u600E\u4E48\u529E\u5462\uFF1F</p><p>\u6765\u4E2A\u7ED3\u5408\u4F53\u5457\uFF0C\u7F16\u8BD1\u5668\u548C\u76F4\u8BD1\u5668\u4E00\u5757\u4E0A\uFF01</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/overview/seven-03.png" alt=""></p>',10),g=n("\u7F16\u8BD1\u5668\u8D1F\u8D23\u628A Java \u6E90\u4EE3\u7801\u7F16\u8BD1\u6210\u5B57\u8282\u7801\uFF08\u4E0D\u6E05\u695A\u7684\u5C0F\u4F19\u4F34\u53EF\u4EE5\u70B9\u51FB\u94FE\u63A5\u67E5\u770B"),h={href:"https://mp.weixin.qq.com/s/GYDFndO0Q1Nqzcc_Te61gw",target:"_blank",rel:"noopener noreferrer"},M=n("\u4E0A\u4E00\u8282"),_=n("\uFF09\uFF0CJava \u865A\u62DF\u673A\uFF08Java Virtual Machine\uFF0C\u7B80\u79F0 JVM\uFF09 \u8D1F\u8D23\u628A\u5B57\u8282\u7801\u8F6C\u6362\u6210\u673A\u5668\u7801\u3002\u8F6C\u6362\u7684\u65F6\u5019\uFF0C\u53EF\u4EE5\u505A\u4E00\u4E9B\u538B\u7F29\u6216\u8005\u4F18\u5316\uFF0C\u8FD9\u6837\u7684\u673A\u5668\u7801\u8DD1\u8D77\u6765\u5C31\u5FEB\u591A\u4E86\u3002"),V=t(`<p>\u4E0D\u4EC5\u8DE8\u5E73\u53F0\u7684\u76EE\u7684\u8FBE\u5230\u4E86\uFF0C\u800C\u4E14\u6027\u80FD\u5F97\u5230\u4E86\u4F18\u5316\u3002</p><p>\u4E09\u59B9\u662F\u4E0D\u662F\u60F3\u95EE\uFF0C\u201C\u4E3A\u4EC0\u4E48 Java \u865A\u62DF\u673A\u4F1A\u53EB Java \u865A\u62DF\u673A\u5462\uFF1F\u201D</p><p>\u865A\u62DF\u673A\uFF0C\u987E\u540D\u601D\u4E49\uFF0C\u5C31\u662F\u865A\u62DF\u7684\u673A\u5668\uFF08\u591A\u82CD\u767D\u7684\u89E3\u91CA\uFF09\uFF0C\u53CD\u6B63\u5C31\u662F\u770B\u4E0D\u89C1\u6478\u4E0D\u7740\u7684\u673A\u5668\uFF0C\u628A\u5B83\u60F3\u8C61\u6210\u4E00\u4E2A\u4F1A\u6267\u884C\u5B57\u8282\u7801\u7684\u602A\u517D\u5427\u3002</p><p>\u8BB0\u5F97\u4E0A\u5927\u5B66\u90A3\u4F1A\uFF0C\u7531\u4E8E\u6CA1\u6709 Linux \u73AF\u5883\uFF0C\u4F46\u53C8\u9700\u8981\u5728\u4E0A\u9762\u73A9\u4E00\u4E9B\u547D\u4EE4\uFF0C\u4E8E\u662F\u5C31\u5728 Windows \u4E0A\u88C5 Linux \u7684\u865A\u62DF\u673A\uFF0C\u8FD9\u4E2A JVM \u5C31\u7C7B\u4F3C\u8FD9\u79CD\u4E1C\u897F\u3002</p><p>\u8BF4\u767D\u4E86\uFF0C\u5C31\u662F\u6211\u4EEC\u7F16\u5199 Java \u4EE3\u7801\uFF0C\u7F16\u8BD1 Java \u4EE3\u7801\uFF0C\u76EE\u7684\u4E0D\u662F\u8BA9\u5B83\u5728 Linux\u3001Windows \u6216\u8005 MacOS \u4E0A\u8DD1\uFF0C\u800C\u662F\u5728 JVM \u4E0A\u8DD1\u3002</p><p>\u8BF4\u5230\u8FD9\uFF0C\u4E09\u59B9\u662F\u4E0D\u662F\u60F3\u95EE\uFF0C\u201C\u90FD\u6709\u54EA\u4E9B Java \u865A\u62DF\u673A\u5462\uFF1F\u201D\u6765\u770B\u4E0B\u9762\u8FD9\u5F20\u601D\u7EF4\u5BFC\u56FE\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/overview/seven-04.png" alt=""></p><p>\u9664\u4E86\u6211\u4EEC\u7ECF\u5E38\u770B\u5230\uFF0C\u7ECF\u5E38\u542C\u5230\u7684 Hotspot VM\uFF0C\u8FD8\u6709\u5F88\u591A\uFF0C\u4E0B\u9762\u6211\u6765\u7B80\u5355\u4ECB\u7ECD\u4E00\u4E0B\u3002</p><ul><li><p>Sun Classic\uFF1A\u4E16\u754C\u4E0A\u7B2C\u4E00\u6B3E\u5546\u7528 Java \u865A\u62DF\u673A\uFF0C\u4F46\u6267\u884C\u6548\u7387\u4F4E\u4E0B\uFF0C\u5BFC\u81F4 Java \u7A0B\u5E8F\u7684\u6027\u80FD\u548C C/C++ \u5B58\u5728\u5F88\u5927\u5DEE\u8DDD\uFF0C\u56E0\u6B64\u7ED9\u540E\u6765\u8005\u7559\u4E0B\u4E86\u201CJava \u8BED\u8A00\u5F88\u6162\u201D\u7684\u523B\u677F\u5370\u8C61\u3002</p></li><li><p>Exact VM\uFF1A\u4E3A\u4E86\u63D0\u5347 Classic \u7684\u6548\u7387\uFF0CSun \u7684\u865A\u62DF\u673A\u56E2\u961F\u66FE\u5728 Solaris\uFF08Sun \u7814\u53D1\u7684\u4E00\u6B3E\u7C7B\u4F3C Unix \u7684\u64CD\u4F5C\u7CFB\u7EDF\uFF09\u4E0A\u53D1\u5E03\u8FC7\u8FD9\u6B3E\u865A\u62DF\u673A\uFF0C\u5B83\u7684\u6267\u884C\u7CFB\u7EDF\u91CC\u5305\u542B\u6709\u70ED\u70B9\u63A2\u6D4B\u3001\u5373\u65F6\u7F16\u8BD1\u7B49\uFF0C\u4F46\u4E0D\u662F\u5F88\u6210\u719F\u3002</p></li></ul><p>Sun Classic \u5728 JDK 1.4 \u7684\u65F6\u5019\u88AB\u5F7B\u5E95\u629B\u5F03\uFF0C\u800C Exact VM \u88AB\u629B\u5F03\u5F97\u66F4\u65E9\uFF0C\u53D6\u4EE3\u5B83\u7684\u6B63\u662F HotSpot VM\u2014\u2014\u65F6\u4E5F\u547D\u4E5F\u3002</p><ul><li>HotSpot VM\uFF1AOracleJDK\uFF08\u5546\u7528\uFF09\u548C OpenJDK\uFF08\u5F00\u6E90\uFF09\u7684\u9ED8\u8BA4\u865A\u62DF\u673A\uFF0C\u4E5F\u662F\u76EE\u524D\u4F7F\u7528\u6700\u5E7F\u6CDB\u7684 Java \u865A\u62DF\u673A\u3002</li></ul><p>HotSpot \u7684\u6280\u672F\u4F18\u52BF\u5C31\u5728\u4E8E\u70ED\u70B9\u4EE3\u7801\u63A2\u6D4B\u6280\u672F\uFF08\u540D\u5B57\u5C31\u4ECE\u8FD9\u6765\uFF09\u548C\u51C6\u786E\u5F0F\u5185\u5B58\u7BA1\u7406\u6280\u672F\uFF0C\u4F46\u5176\u5B9E\u8FD9\u4E24\u4E2A\u6280\u672F\u5728 Exact VM \u4E2D\u90FD\u6709\u4F53\u73B0\uFF0C\u56E0\u6B64\u4F60\u770B\u8D77\u4E2A\u597D\u7684\u540D\u5B57\u591A\u91CD\u8981\uFF08\u5F00\u73A9\u7B11\u4E86\uFF0C\u8FD9\u5C31\u662F\u547D\uFF09\u3002</p><p>\u70ED\u70B9\u4EE3\u7801\u63A2\u6D4B\uFF0C\u6307\u7684\u662F\uFF0C\u901A\u8FC7\u6267\u884C\u8BA1\u6570\u5668\u627E\u51FA\u6700\u5177\u6709\u7F16\u8BD1\u4EF7\u503C\u7684\u4EE3\u7801\uFF0C\u7136\u540E\u901A\u77E5\u5373\u65F6\u7F16\u8BD1\u5668\u4EE5\u65B9\u6CD5\u4E3A\u5355\u4F4D\u8FDB\u884C\u7F16\u8BD1\uFF0C\u89E3\u91CA\u5668\u5C31\u53EF\u4EE5\u4E0D\u518D\u9010\u884C\u7684\u5C06\u5B57\u8282\u7801\u7FFB\u8BD1\u6210\u673A\u5668\u7801\uFF0C\u800C\u662F\u5C06\u4E00\u6574\u4E2A\u65B9\u6CD5\u7684\u6240\u6709\u5B57\u8282\u7801\u7FFB\u8BD1\u6210\u673A\u5668\u7801\u518D\u6267\u884C\u3002</p><p>\u8FD9\u6837\u7684\u8BDD\uFF0C\u6548\u7387\u5C31\u63D0\u9AD8\u4E86\u5F88\u591A\uFF0C\u5BF9\u5427\uFF1F</p><ul><li><p>Mobile VM\uFF1AJava \u5728\u79FB\u52A8\u624B\u673A\u7AEF\uFF08\u88AB Android \u548C IOS \u4E8C\u5206\u5929\u4E0B\uFF09\u7684\u53D1\u5C55\u5E76\u6CA1\u6709\u90A3\u4E48\u6210\u529F\uFF0C\u56E0\u6B64 Mobile VM \u7684\u58F0\u671B\u503C\u6BD4\u8F83\u4F4E\u3002</p></li><li><p>Embedded VM\uFF1A\u5D4C\u5165\u5F0F\u8BBE\u5907\u4E0A\u7684\u865A\u62DF\u673A\u3002</p></li><li><p>BEA JRockit\uFF1A\u66FE\u7ECF\u53F7\u79F0\u662F\u201C\u4E16\u754C\u4E0A\u6700\u5FEB\u7684 Java \u865A\u62DF\u673A\u201D\uFF0C\u540E\u6765\u88AB Oracle \u6536\u8D2D\u540E\u5C31\u6CA1\u6709\u58F0\u97F3\u4E86\u3002</p></li><li><p>IBM J9 VM\uFF1A\u63D0\u8D77 IBM\uFF0C\u57FA\u672C\u4E0A\u6240\u6709\u7A0B\u5E8F\u5458\u90FD\u77E5\u9053\u4E86\uFF0C\u4E5F\u662F\u4E2A\u5DE8\u5934\uFF0C\u6240\u4EE5\u4ED6\u5BB6\u7684\u865A\u62DF\u673A\u4E5F\u5F88\u5F3A\uFF0C\u5728\u804C\u8D23\u5206\u79BB\u548C\u6A21\u5757\u5316\u4E0A\u505A\u5F97\u6BD4 HotSpot \u66F4\u597D\u3002\u76EE\u524D\u5DF2\u7ECF\u5F00\u6E90\u7ED9 Eclipse \u57FA\u91D1\u4F1A\u3002</p></li><li><p>BEA Liquid VM\uFF1A\u662F BEA \u516C\u53F8\u5F00\u53D1\u7684\u53EF\u4EE5\u76F4\u63A5\u8FD0\u884C\u5728\u81EA\u5BB6\u7CFB\u7EDF\u4E0A\u7684\u865A\u62DF\u673A\uFF0C\u53EF\u4EE5\u8D8A\u8FC7\u64CD\u4F5C\u7CFB\u7EDF\u76F4\u63A5\u548C\u786C\u4EF6\u6253\u4EA4\u9053\uFF0C\u56E0\u6B64\u53EF\u4EE5\u66F4\u5927\u7A0B\u5EA6\u4E0A\u7684\u53D1\u6325\u786C\u4EF6\u7684\u80FD\u529B\u3002\u4E0D\u8FC7\u6838\u5FC3\u7528\u7684\u8FD8\u662F JRockit\uFF0C\u6240\u4EE5\u4F34\u968F\u7740 JRockit \u7684\u6D88\u5931\uFF0CLiquid VM \u4E5F\u9000\u51FA\u5386\u53F2\u821E\u53F0\u4E86\u3002</p></li><li><p>Azul VM\uFF1A\u662F Azul \u516C\u53F8\u5728 HotSpot \u57FA\u7840\u4E0A\u8FDB\u884C\u5927\u91CF\u6539\u8FDB\u540E\u7684\uFF0C\u53EF\u4EE5\u8FD0\u884C\u5728 Azul \u516C\u53F8\u4E13\u6709\u786C\u4EF6\u4E0A\u7684\u865A\u62DF\u673A\u30022010 \u5E74\u8D77\uFF0CAzul \u516C\u53F8\u7684\u91CD\u5FC3\u4ECE\u786C\u4EF6\u8F6C\u79FB\u5230\u8F6F\u4EF6\u4E0A\uFF0C\u5E76\u53D1\u5E03\u4E86 Zing \u865A\u62DF\u673A\uFF0C\u6027\u80FD\u65B9\u9762\u5F88\u5F3A\u5927\u3002</p></li><li><p>Apache Harmony \u548C Google Android Dalvik VM \u5E76\u4E0D\u662F \u4E25\u683C\u610F\u4E49\u4E0A\u7684 Java \u865A\u62DF\u673A\uFF0C\u4F46\u5BF9 Java \u865A\u62DF\u673A\u7684\u53D1\u5C55\u8D77\u5230\u4E86\u5F88\u5927\u7684\u523A\u6FC0\u4F5C\u7528\u3002\u4F46\u5B83\u4EEC\u7EC8\u7A76\u6CA1\u6709\u71AC\u8FC7\u65F6\u95F4\u3002</p></li><li><p>Microsoft JVM\uFF1A\u5728\u65E9\u671F\u7684 Java Applets \u5E74\u4EE3\uFF0C\u5FAE\u8F6F\u4E3A\u4E86\u5728 IE \u4E2D\u652F\u6301 Applets \u5F00\u53D1\u4E86\u81EA\u5DF1\u7684 Java \u865A\u62DF\u673A\u3002\u4F60\u6562\u76F8\u4FE1\uFF1FMicrosoft JVM \u53EA\u6709 Windows \u7248\u672C\uFF0C\u5B83\u4E0E JVM \u5B9E\u73B0\u7684\u201C\u4E00\u6B21\u7F16\u8BD1\uFF0C\u5230\u5904\u8FD0\u884C\u201D\u7684\u7406\u5FF5\u5B8C\u5168\u6CBE\u4E0D\u4E0A\u8FB9\u3002</p></li></ul><p>\u5173\u952E\u662F\uFF0C1997 \u5E74 10 \u6708\uFF0CSun \u516C\u53F8\u56E0\u4E3A\u8FD9\u4E8B\u628A\u5FAE\u8F6F\u544A\u4E86\uFF0C\u6700\u540E\u5FAE\u8F6F\u8D54\u7ED9\u4E86 Sun \u516C\u53F8 2000 \u4E07\u7F8E\u91D1\uFF0C\u5E76\u4E14\u7EC8\u6B62\u4E86\u5728 Java \u865A\u62DF\u673A\u65B9\u9762\u7684\u53D1\u5C55\u3002\u5982\u679C\uFF0C\u6211\u662F\u8BF4\u5982\u679C\uFF0C\u5982\u679C\u5FAE\u8F6F\u4FDD\u6301\u7740\u5BF9 Java \u7684\u70ED\u60C5\uFF0C\u540E\u9762\u8FD8\u6709 .Net \u4EC0\u4E48\u4E8B\uFF1F</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/overview/seven-05.png" alt=""></p><p>\u89E3\u91CA\u4E86\u8FD9\u4E48\u591A Java \u865A\u62DF\u673A\u540E\uFF0C\u4E09\u59B9\u662F\u4E0D\u662F\u60F3\u95EE\uFF0C\u201CJava \u865A\u62DF\u673A\u957F\u4EC0\u4E48\u6837\u5B50\u5462\uFF1F\u201D</p><p>Java \u865A\u62DF\u673A\u867D\u7136\u662F\u865A\u62DF\u7684\uFF0C\u4F46\u5B83\u7684\u5185\u90E8\u662F\u53EF\u4EE5\u5212\u5206\u4E3A\uFF1A</p><ul><li>\u7C7B\u52A0\u8F7D\u5668\uFF08Class Loader\uFF09</li><li>\u8FD0\u884C\u65F6\u6570\u636E\u533A\uFF08Runtime Data Areas\uFF09</li><li>\u6267\u884C\u5F15\u64CE\uFF08Excution Engine\uFF09</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/overview/seven-06.png" alt=""></p><p><strong>1\uFF09\u7C7B\u52A0\u8F7D\u5668</strong></p><p>\u7C7B\u52A0\u8F7D\u5668\u662F Java \u865A\u62DF\u673A\u7684\u4E00\u4E2A\u5B50\u7CFB\u7EDF\uFF0C\u7528\u4E8E\u52A0\u8F7D\u7C7B\u6587\u4EF6\u3002\u6BCF\u5F53\u6211\u4EEC\u8FD0\u884C\u4E00\u4E2A Java \u7A0B\u5E8F\uFF0C\u5B83\u90FD\u4F1A\u7531\u7C7B\u52A0\u8F7D\u5668\u9996\u5148\u52A0\u8F7D\u3002</p><p>\u4E00\u822C\u6765\u8BF4\uFF0CJava \u7A0B\u5E8F\u5458\u5E76\u4E0D\u9700\u8981\u76F4\u63A5\u540C\u7C7B\u52A0\u8F7D\u5668\u8FDB\u884C\u4EA4\u4E92\u3002JVM \u9ED8\u8BA4\u7684\u884C\u4E3A\u5C31\u5DF2\u7ECF\u8DB3\u591F\u6EE1\u8DB3\u5927\u591A\u6570\u60C5\u51B5\u7684\u9700\u6C42\u4E86\u3002\u4E0D\u8FC7\uFF0C\u5982\u679C\u9047\u5230\u4E86\u9700\u8981\u548C\u7C7B\u52A0\u8F7D\u5668\u8FDB\u884C\u4EA4\u4E92\u7684\u60C5\u51B5\uFF0C\u800C\u5BF9\u7C7B\u52A0\u8F7D\u5668\u7684\u673A\u5236\u53C8\u4E0D\u662F\u5F88\u4E86\u89E3\u7684\u8BDD\uFF0C\u5C31\u4E0D\u5F97\u4E0D\u82B1\u5927\u91CF\u7684\u65F6\u95F4\u53BB\u8C03\u8BD5 <code>ClassNotFoundException</code> \u548C <code>NoClassDefFoundError</code> \u7B49\u5F02\u5E38\u3002</p><p>\u5BF9\u4E8E\u4EFB\u610F\u4E00\u4E2A\u7C7B\uFF0C\u90FD\u9700\u8981\u7531\u5B83\u7684\u7C7B\u52A0\u8F7D\u5668\u548C\u8FD9\u4E2A\u7C7B\u672C\u8EAB\u4E00\u540C\u786E\u5B9A\u5176\u5728 JVM \u4E2D\u7684\u552F\u4E00\u6027\u3002\u4E5F\u5C31\u662F\u8BF4\uFF0C\u5982\u679C\u4E24\u4E2A\u7C7B\u7684\u52A0\u8F7D\u5668\u4E0D\u540C\uFF0C\u5373\u4F7F\u4E24\u4E2A\u7C7B\u6765\u6E90\u4E8E\u540C\u4E00\u4E2A\u5B57\u8282\u7801\u6587\u4EF6\uFF0C\u90A3\u8FD9\u4E24\u4E2A\u7C7B\u5C31\u5FC5\u5B9A\u4E0D\u76F8\u7B49\uFF08\u6BD4\u5982\u4E24\u4E2A\u7C7B\u7684 Class \u5BF9\u8C61\u4E0D <code>equals</code>\uFF09\u3002</p><p>\u6765\u901A\u8FC7\u4E00\u6BB5\u7B80\u5355\u7684\u4EE3\u7801\u4E86\u89E3\u4E0B\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token doc-comment comment">/**
  * <span class="token keyword">@author</span> \u5FAE\u4FE1\u641C\u300C\u6C89\u9ED8\u738B\u4E8C\u300D\uFF0C\u56DE\u590D\u5173\u952E\u5B57 PDF
  */</span>
 <span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">Test</span> <span class="token punctuation">{</span>
diff --git a/dist/assets/whereis-the-object.html.f6879982.js b/dist/assets/whereis-the-object.html.5fa8d65e.js
similarity index 99%
rename from dist/assets/whereis-the-object.html.f6879982.js
rename to dist/assets/whereis-the-object.html.5fa8d65e.js
index 847af730..49cb9771 100644
--- a/dist/assets/whereis-the-object.html.f6879982.js
+++ b/dist/assets/whereis-the-object.html.5fa8d65e.js
@@ -1 +1 @@
-import{_ as e}from"./plugin-vue_export-helper.21dcd24c.js";import{o as r,c as t,e as a}from"./app.a0271b9c.js";const o={},i=a('<h1 id="java-\u521B\u5EFA\u7684\u5BF9\u8C61\u5230\u5E95\u653E\u5728\u54EA" tabindex="-1"><a class="header-anchor" href="#java-\u521B\u5EFA\u7684\u5BF9\u8C61\u5230\u5E95\u653E\u5728\u54EA" aria-hidden="true">#</a> Java \u521B\u5EFA\u7684\u5BF9\u8C61\u5230\u5E95\u653E\u5728\u54EA\uFF1F</h1><p>\u5927\u5BB6\u597D\uFF0C\u6211\u662F\u4E8C\u54E5\u5440\u3002\u521B\u5EFA\u5BF9\u8C61\u7684\u65F6\u5019\uFF0C\u5BF9\u8C61\u662F\u5728\u5806\u5185\u5B58\u4E2D\u521B\u5EFA\u7684\u3002\u4F46\u5806\u5185\u5B58\u53C8\u5206\u4E3A\u65B0\u751F\u4EE3\u548C\u8001\u5E74\u4EE3\uFF0C\u65B0\u751F\u4EE3\u53C8\u7EC6\u5206\u4E3A Eden \u7A7A\u95F4\u3001From Survivor \u7A7A\u95F4\u3001To Survivor \u7A7A\u95F4\u3002<strong>\u90A3\u6211\u4EEC\u521B\u5EFA\u7684\u5BF9\u8C61\u5230\u5E95\u5728\u54EA\u91CC</strong>\uFF1F</p><h3 id="\u4E00\u3001\u5BF9\u8C61\u4F18\u5148\u5728-eden-\u5206\u914D" tabindex="-1"><a class="header-anchor" href="#\u4E00\u3001\u5BF9\u8C61\u4F18\u5148\u5728-eden-\u5206\u914D" aria-hidden="true">#</a> \u4E00\u3001\u5BF9\u8C61\u4F18\u5148\u5728 Eden \u5206\u914D</h3><p>\u5806\u5185\u5B58\u5206\u4E3A\u65B0\u751F\u4EE3\u548C\u8001\u5E74\u4EE3\uFF0C\u65B0\u751F\u4EE3\u662F\u7528\u4E8E\u5B58\u653E\u4F7F\u7528\u540E\u51C6\u5907\u88AB\u56DE\u6536\u7684\u5BF9\u8C61\uFF0C\u8001\u5E74\u4EE3\u662F\u7528\u4E8E\u5B58\u653E\u751F\u547D\u5468\u671F\u6BD4\u8F83\u957F\u7684\u5BF9\u8C61\u3002</p><p>\u5927\u90E8\u5206\u6211\u4EEC\u521B\u5EFA\u7684\u5BF9\u8C61\uFF0C\u90FD\u5C5E\u4E8E\u751F\u547D\u5468\u671F\u6BD4\u8F83\u77ED\u7684\uFF0C\u6240\u4EE5\u4F1A\u5B58\u653E\u5728\u65B0\u751F\u4EE3\u3002\u65B0\u751F\u4EE3\u53C8\u7EC6\u5206 Eden \u7A7A\u95F4\u3001From Survivor \u7A7A\u95F4\u3001To Survivor \u7A7A\u95F4\uFF0C\u6211\u4EEC\u521B\u5EFA\u7684\u5BF9\u8C61\u4F18\u5148\u5728 Eden \u5206\u914D\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/whereis-the-object-1.png" alt=""></p><p>\u968F\u7740\u5BF9\u8C61\u7684\u521B\u5EFA\uFF0CEden \u5269\u4F59\u5185\u5B58\u7A7A\u95F4\u8D8A\u6765\u8D8A\u5C11\uFF0C\u5C31\u4F1A\u89E6\u53D1 Minor GC\uFF0C\u4E8E\u662F Eden \u7684\u5B58\u6D3B\u5BF9\u8C61\u4F1A\u653E\u5165 From Survivor \u7A7A\u95F4\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/whereis-the-object-2.png" alt=""></p><p>Minor GC \u540E\uFF0C\u65B0\u5BF9\u8C61\u4F9D\u7136\u4F1A\u5F80 Eden \u5206\u914D\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/whereis-the-object-3.png" alt=""></p><p>Eden \u5269\u4F59\u5185\u5B58\u7A7A\u95F4\u8D8A\u6765\u8D8A\u5C11\uFF0C\u53C8\u4F1A\u89E6\u53D1 Minor GC\uFF0C\u4E8E\u662F Eden \u548C From Survivor \u7684\u5B58\u6D3B\u5BF9\u8C61\u4F1A\u653E\u5165 To Survivor \u7A7A\u95F4\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/whereis-the-object-4.png" alt=""></p><h3 id="\u4E8C\u3001\u5927\u5BF9\u8C61\u76F4\u63A5\u8FDB\u5165\u8001\u5E74\u4EE3" tabindex="-1"><a class="header-anchor" href="#\u4E8C\u3001\u5927\u5BF9\u8C61\u76F4\u63A5\u8FDB\u5165\u8001\u5E74\u4EE3" aria-hidden="true">#</a> \u4E8C\u3001\u5927\u5BF9\u8C61\u76F4\u63A5\u8FDB\u5165\u8001\u5E74\u4EE3</h3><p>\u5728\u4E0A\u9762\u7684\u6D41\u7A0B\u4E2D\uFF0C\u5982\u679C\u4E00\u4E2A\u5BF9\u8C61\u5F88\u5927\uFF0C\u4E00\u76F4\u5728 Survivor \u7A7A\u95F4\u590D\u5236\u6765\u590D\u5236\u53BB\uFF0C\u90A3\u5F88\u8D39\u6027\u80FD\uFF0C\u6240\u4EE5\u8FD9\u4E9B\u5927\u5BF9\u8C61\u76F4\u63A5\u8FDB\u5165\u8001\u5E74\u4EE3\u3002</p><p>\u53EF\u4EE5\u7528 <code>XX:PretenureSizeThreshold</code> \u6765\u8BBE\u7F6E\u8FD9\u4E9B\u5927\u5BF9\u8C61\u7684\u9608\u503C\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/whereis-the-object-5.png" alt=""></p><h3 id="\u4E09\u3001\u957F\u671F\u5B58\u6D3B\u7684\u5BF9\u8C61\u5C06\u8FDB\u5165\u8001\u5E74\u4EE3" tabindex="-1"><a class="header-anchor" href="#\u4E09\u3001\u957F\u671F\u5B58\u6D3B\u7684\u5BF9\u8C61\u5C06\u8FDB\u5165\u8001\u5E74\u4EE3" aria-hidden="true">#</a> \u4E09\u3001\u957F\u671F\u5B58\u6D3B\u7684\u5BF9\u8C61\u5C06\u8FDB\u5165\u8001\u5E74\u4EE3</h3><p>\u5728\u4E0A\u9762\u7684\u6D41\u7A0B\u4E2D\uFF0C\u5982\u679C\u4E00\u4E2A\u5BF9\u8C61 Hello_A\uFF0C\u5DF2\u7ECF\u7ECF\u5386\u4E86 15 \u6B21 Minor GC \u8FD8\u5B58\u6D3B\u5728 Survivor \u7A7A\u95F4\u4E2D\uFF0C\u90A3\u4ED6\u5373\u5C06\u8F6C\u79FB\u5230\u8001\u5E74\u4EE3\u3002\u8FD9\u4E2A 15 \u53EF\u4EE5\u901A\u8FC7 <code>-XX:MaxTenuringThreshold</code> \u6765\u8BBE\u7F6E\u7684\uFF0C\u9ED8\u8BA4\u662F 15\u3002</p><p>\u865A\u62DF\u673A\u4E3A\u4E86\u7ED9\u5BF9\u8C61\u8BA1\u7B97\u4ED6\u5230\u5E95\u7ECF\u5386\u4E86\u51E0\u6B21 Minor GC\uFF0C\u4F1A\u7ED9\u6BCF\u4E2A\u5BF9\u8C61\u5B9A\u4E49\u4E86\u4E00\u4E2A\u5BF9\u8C61\u5E74\u9F84\u8BA1\u6570\u5668\u3002\u5982\u679C\u5BF9\u8C61\u5728 Eden \u4E2D\u7ECF\u8FC7\u7B2C\u4E00\u6B21 Minor GC \u540E\u4ECD\u7136\u5B58\u6D3B\uFF0C\u79FB\u52A8\u5230 Survivor \u7A7A\u95F4\u5E74\u9F84\u52A0 1\uFF0C\u5728 Survivor \u533A\u4E2D\u6BCF\u7ECF\u5386\u8FC7 Minor GC \u540E\u4ECD\u7136\u5B58\u6D3B\u5E74\u9F84\u518D\u52A0 1\u3002\u5E74\u9F84\u5230\u4E86 15\uFF0C\u5C31\u5230\u4E86\u8001\u5E74\u4EE3\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/whereis-the-object-6.png" alt=""></p><h3 id="\u56DB\u3001\u52A8\u6001\u5E74\u9F84\u5224\u65AD" tabindex="-1"><a class="header-anchor" href="#\u56DB\u3001\u52A8\u6001\u5E74\u9F84\u5224\u65AD" aria-hidden="true">#</a> \u56DB\u3001\u52A8\u6001\u5E74\u9F84\u5224\u65AD</h3><p>\u9664\u4E86\u5E74\u9F84\u8FBE\u5230 MaxTenuringThreshold \u7684\u503C\uFF0C\u8FD8\u6709\u53E6\u5916\u4E00\u4E2A\u65B9\u5F0F\u8FDB\u5165\u8001\u5E74\u4EE3\uFF0C\u90A3\u5C31\u662F\u52A8\u6001\u5E74\u9F84\u5224\u65AD\uFF1A\u5728 Survivor \u7A7A\u95F4\u4E2D\u76F8\u540C\u5E74\u9F84\u6240\u6709\u5BF9\u8C61\u5927\u5C0F\u7684\u603B\u548C\u5927\u4E8E Survivor \u7A7A\u95F4\u7684\u4E00\u534A\uFF0C\u5E74\u9F84\u5927\u4E8E\u6216\u7B49\u4E8E\u8BE5\u5E74\u9F84\u7684\u5BF9\u8C61\u5C31\u53EF\u4EE5\u76F4\u63A5\u8FDB\u5165\u8001\u5E74\u4EE3\u3002</p><p>\u6BD4\u5982 Survivor \u662F 100M\uFF0CHello1 \u548C Hello2 \u90FD\u662F 3 \u5C81\uFF0C\u4E14\u603B\u548C\u8D85\u8FC7\u4E86 50M\uFF0CHello3 \u662F 4 \u5C81\uFF0C\u8FD9\u4E2A\u65F6\u5019\uFF0C\u8FD9\u4E09\u4E2A\u5BF9\u8C61\u90FD\u5C06\u5230\u8001\u5E74\u4EE3\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/whereis-the-object-7.png" alt=""></p><h3 id="\u4E94\u3001\u7A7A\u95F4\u5206\u914D\u62C5\u4FDD" tabindex="-1"><a class="header-anchor" href="#\u4E94\u3001\u7A7A\u95F4\u5206\u914D\u62C5\u4FDD" aria-hidden="true">#</a> \u4E94\u3001\u7A7A\u95F4\u5206\u914D\u62C5\u4FDD</h3><p>\u4E0A\u9762\u7684\u6D41\u7A0B\u63D0\u8FC7\uFF0C\u5B58\u6D3B\u7684\u5BF9\u8C61\u90FD\u4F1A\u653E\u5165\u53E6\u5916\u4E00\u4E2A Survivor \u7A7A\u95F4\uFF0C\u5982\u679C\u8FD9\u4E9B\u5B58\u6D3B\u7684\u5BF9\u8C61\u6BD4 Survivor \u7A7A\u95F4\u8FD8\u5927\u5462\uFF1F\u6574\u4E2A\u6D41\u7A0B\u5982\u4E0B\uFF1A</p><ul><li>Minor GC \u4E4B\u524D\uFF0C\u865A\u62DF\u673A\u4F1A\u5148\u68C0\u67E5\u8001\u5E74\u4EE3\u6700\u5927\u53EF\u7528\u7684\u8FDE\u7EED\u7A7A\u95F4\u662F\u5426\u5927\u4E8E\u65B0\u751F\u4EE3\u6240\u6709\u5BF9\u8C61\u603B\u7A7A\u95F4\uFF0C\u5982\u679C\u5927\u4E8E\uFF0C\u5219\u53D1\u8D77 Minor GC\u3002</li><li>\u5982\u679C\u5C0F\u4E8E\uFF0C\u5219\u770B HandlePromotionFailure \u6709\u6CA1\u6709\u8BBE\u7F6E\uFF0C\u5982\u679C\u6CA1\u6709\u8BBE\u7F6E\uFF0C\u5C31\u53D1\u8D77 full gc\u3002</li><li>\u5982\u679C\u8BBE\u7F6E\u4E86 HandlePromotionFailure\uFF0C\u5219\u770B\u8001\u5E74\u4EE3\u6700\u5927\u53EF\u7528\u7684\u8FDE\u7EED\u7A7A\u95F4\u662F\u5426\u5927\u4E8E\u5386\u6B21\u664B\u5347\u5230\u8001\u5E74\u4EE3\u5BF9\u8C61\u7684\u5E73\u5747\u5927\u5C0F\uFF0C\u5982\u679C\u5C0F\u4E8E\uFF0C\u5C31\u53D1\u8D77 full gc\u3002</li><li>\u5982\u679C\u5927\u4E8E\uFF0C\u53D1\u8D77 Minor GC\u3002Minor GC \u540E\uFF0C\u770B Survivor \u7A7A\u95F4\u662F\u5426\u8DB3\u591F\u5B58\u653E\u5B58\u6D3B\u5BF9\u8C61\uFF0C\u5982\u679C\u4E0D\u591F\uFF0C\u5C31\u653E\u5165\u8001\u5E74\u4EE3\uFF0C\u5982\u679C\u591F\u653E\uFF0C\u5C31\u76F4\u63A5\u5B58\u653E Survivor \u7A7A\u95F4\u3002\u5982\u679C\u8001\u5E74\u4EE3\u90FD\u4E0D\u591F\u653E\u5B58\u6D3B\u5BF9\u8C61\uFF0C\u62C5\u4FDD\u5931\u8D25\uFF08Handle Promotion Failure\uFF09\uFF0C\u53D1\u8D77 full gc\u3002</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/whereis-the-object-8.png" alt=""></p><p>\u597D\u4E86\uFF0C\u4ECA\u5929\u5C31\u5206\u4EAB\u5230\u8FD9\u513F\u5427\uFF0C\u6211\u662F\u4E8C\u54E5\u5440\uFF0C\u6211\u4EEC\u4E0B\u671F\u89C1~~</p><hr><blockquote><p>\u539F\u6587\u94FE\u63A5\uFF1Ajuejin.cn/post/7052894117105238053</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p>',32),n=[i];function h(c,p){return r(),t("div",null,n)}var l=e(o,[["render",h],["__file","whereis-the-object.html.vue"]]);export{l as default};
+import{_ as e}from"./plugin-vue_export-helper.21dcd24c.js";import{o as r,c as t,e as a}from"./app.615e41d8.js";const o={},i=a('<h1 id="java-\u521B\u5EFA\u7684\u5BF9\u8C61\u5230\u5E95\u653E\u5728\u54EA" tabindex="-1"><a class="header-anchor" href="#java-\u521B\u5EFA\u7684\u5BF9\u8C61\u5230\u5E95\u653E\u5728\u54EA" aria-hidden="true">#</a> Java \u521B\u5EFA\u7684\u5BF9\u8C61\u5230\u5E95\u653E\u5728\u54EA\uFF1F</h1><p>\u5927\u5BB6\u597D\uFF0C\u6211\u662F\u4E8C\u54E5\u5440\u3002\u521B\u5EFA\u5BF9\u8C61\u7684\u65F6\u5019\uFF0C\u5BF9\u8C61\u662F\u5728\u5806\u5185\u5B58\u4E2D\u521B\u5EFA\u7684\u3002\u4F46\u5806\u5185\u5B58\u53C8\u5206\u4E3A\u65B0\u751F\u4EE3\u548C\u8001\u5E74\u4EE3\uFF0C\u65B0\u751F\u4EE3\u53C8\u7EC6\u5206\u4E3A Eden \u7A7A\u95F4\u3001From Survivor \u7A7A\u95F4\u3001To Survivor \u7A7A\u95F4\u3002<strong>\u90A3\u6211\u4EEC\u521B\u5EFA\u7684\u5BF9\u8C61\u5230\u5E95\u5728\u54EA\u91CC</strong>\uFF1F</p><h3 id="\u4E00\u3001\u5BF9\u8C61\u4F18\u5148\u5728-eden-\u5206\u914D" tabindex="-1"><a class="header-anchor" href="#\u4E00\u3001\u5BF9\u8C61\u4F18\u5148\u5728-eden-\u5206\u914D" aria-hidden="true">#</a> \u4E00\u3001\u5BF9\u8C61\u4F18\u5148\u5728 Eden \u5206\u914D</h3><p>\u5806\u5185\u5B58\u5206\u4E3A\u65B0\u751F\u4EE3\u548C\u8001\u5E74\u4EE3\uFF0C\u65B0\u751F\u4EE3\u662F\u7528\u4E8E\u5B58\u653E\u4F7F\u7528\u540E\u51C6\u5907\u88AB\u56DE\u6536\u7684\u5BF9\u8C61\uFF0C\u8001\u5E74\u4EE3\u662F\u7528\u4E8E\u5B58\u653E\u751F\u547D\u5468\u671F\u6BD4\u8F83\u957F\u7684\u5BF9\u8C61\u3002</p><p>\u5927\u90E8\u5206\u6211\u4EEC\u521B\u5EFA\u7684\u5BF9\u8C61\uFF0C\u90FD\u5C5E\u4E8E\u751F\u547D\u5468\u671F\u6BD4\u8F83\u77ED\u7684\uFF0C\u6240\u4EE5\u4F1A\u5B58\u653E\u5728\u65B0\u751F\u4EE3\u3002\u65B0\u751F\u4EE3\u53C8\u7EC6\u5206 Eden \u7A7A\u95F4\u3001From Survivor \u7A7A\u95F4\u3001To Survivor \u7A7A\u95F4\uFF0C\u6211\u4EEC\u521B\u5EFA\u7684\u5BF9\u8C61\u4F18\u5148\u5728 Eden \u5206\u914D\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/whereis-the-object-1.png" alt=""></p><p>\u968F\u7740\u5BF9\u8C61\u7684\u521B\u5EFA\uFF0CEden \u5269\u4F59\u5185\u5B58\u7A7A\u95F4\u8D8A\u6765\u8D8A\u5C11\uFF0C\u5C31\u4F1A\u89E6\u53D1 Minor GC\uFF0C\u4E8E\u662F Eden \u7684\u5B58\u6D3B\u5BF9\u8C61\u4F1A\u653E\u5165 From Survivor \u7A7A\u95F4\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/whereis-the-object-2.png" alt=""></p><p>Minor GC \u540E\uFF0C\u65B0\u5BF9\u8C61\u4F9D\u7136\u4F1A\u5F80 Eden \u5206\u914D\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/whereis-the-object-3.png" alt=""></p><p>Eden \u5269\u4F59\u5185\u5B58\u7A7A\u95F4\u8D8A\u6765\u8D8A\u5C11\uFF0C\u53C8\u4F1A\u89E6\u53D1 Minor GC\uFF0C\u4E8E\u662F Eden \u548C From Survivor \u7684\u5B58\u6D3B\u5BF9\u8C61\u4F1A\u653E\u5165 To Survivor \u7A7A\u95F4\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/whereis-the-object-4.png" alt=""></p><h3 id="\u4E8C\u3001\u5927\u5BF9\u8C61\u76F4\u63A5\u8FDB\u5165\u8001\u5E74\u4EE3" tabindex="-1"><a class="header-anchor" href="#\u4E8C\u3001\u5927\u5BF9\u8C61\u76F4\u63A5\u8FDB\u5165\u8001\u5E74\u4EE3" aria-hidden="true">#</a> \u4E8C\u3001\u5927\u5BF9\u8C61\u76F4\u63A5\u8FDB\u5165\u8001\u5E74\u4EE3</h3><p>\u5728\u4E0A\u9762\u7684\u6D41\u7A0B\u4E2D\uFF0C\u5982\u679C\u4E00\u4E2A\u5BF9\u8C61\u5F88\u5927\uFF0C\u4E00\u76F4\u5728 Survivor \u7A7A\u95F4\u590D\u5236\u6765\u590D\u5236\u53BB\uFF0C\u90A3\u5F88\u8D39\u6027\u80FD\uFF0C\u6240\u4EE5\u8FD9\u4E9B\u5927\u5BF9\u8C61\u76F4\u63A5\u8FDB\u5165\u8001\u5E74\u4EE3\u3002</p><p>\u53EF\u4EE5\u7528 <code>XX:PretenureSizeThreshold</code> \u6765\u8BBE\u7F6E\u8FD9\u4E9B\u5927\u5BF9\u8C61\u7684\u9608\u503C\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/whereis-the-object-5.png" alt=""></p><h3 id="\u4E09\u3001\u957F\u671F\u5B58\u6D3B\u7684\u5BF9\u8C61\u5C06\u8FDB\u5165\u8001\u5E74\u4EE3" tabindex="-1"><a class="header-anchor" href="#\u4E09\u3001\u957F\u671F\u5B58\u6D3B\u7684\u5BF9\u8C61\u5C06\u8FDB\u5165\u8001\u5E74\u4EE3" aria-hidden="true">#</a> \u4E09\u3001\u957F\u671F\u5B58\u6D3B\u7684\u5BF9\u8C61\u5C06\u8FDB\u5165\u8001\u5E74\u4EE3</h3><p>\u5728\u4E0A\u9762\u7684\u6D41\u7A0B\u4E2D\uFF0C\u5982\u679C\u4E00\u4E2A\u5BF9\u8C61 Hello_A\uFF0C\u5DF2\u7ECF\u7ECF\u5386\u4E86 15 \u6B21 Minor GC \u8FD8\u5B58\u6D3B\u5728 Survivor \u7A7A\u95F4\u4E2D\uFF0C\u90A3\u4ED6\u5373\u5C06\u8F6C\u79FB\u5230\u8001\u5E74\u4EE3\u3002\u8FD9\u4E2A 15 \u53EF\u4EE5\u901A\u8FC7 <code>-XX:MaxTenuringThreshold</code> \u6765\u8BBE\u7F6E\u7684\uFF0C\u9ED8\u8BA4\u662F 15\u3002</p><p>\u865A\u62DF\u673A\u4E3A\u4E86\u7ED9\u5BF9\u8C61\u8BA1\u7B97\u4ED6\u5230\u5E95\u7ECF\u5386\u4E86\u51E0\u6B21 Minor GC\uFF0C\u4F1A\u7ED9\u6BCF\u4E2A\u5BF9\u8C61\u5B9A\u4E49\u4E86\u4E00\u4E2A\u5BF9\u8C61\u5E74\u9F84\u8BA1\u6570\u5668\u3002\u5982\u679C\u5BF9\u8C61\u5728 Eden \u4E2D\u7ECF\u8FC7\u7B2C\u4E00\u6B21 Minor GC \u540E\u4ECD\u7136\u5B58\u6D3B\uFF0C\u79FB\u52A8\u5230 Survivor \u7A7A\u95F4\u5E74\u9F84\u52A0 1\uFF0C\u5728 Survivor \u533A\u4E2D\u6BCF\u7ECF\u5386\u8FC7 Minor GC \u540E\u4ECD\u7136\u5B58\u6D3B\u5E74\u9F84\u518D\u52A0 1\u3002\u5E74\u9F84\u5230\u4E86 15\uFF0C\u5C31\u5230\u4E86\u8001\u5E74\u4EE3\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/whereis-the-object-6.png" alt=""></p><h3 id="\u56DB\u3001\u52A8\u6001\u5E74\u9F84\u5224\u65AD" tabindex="-1"><a class="header-anchor" href="#\u56DB\u3001\u52A8\u6001\u5E74\u9F84\u5224\u65AD" aria-hidden="true">#</a> \u56DB\u3001\u52A8\u6001\u5E74\u9F84\u5224\u65AD</h3><p>\u9664\u4E86\u5E74\u9F84\u8FBE\u5230 MaxTenuringThreshold \u7684\u503C\uFF0C\u8FD8\u6709\u53E6\u5916\u4E00\u4E2A\u65B9\u5F0F\u8FDB\u5165\u8001\u5E74\u4EE3\uFF0C\u90A3\u5C31\u662F\u52A8\u6001\u5E74\u9F84\u5224\u65AD\uFF1A\u5728 Survivor \u7A7A\u95F4\u4E2D\u76F8\u540C\u5E74\u9F84\u6240\u6709\u5BF9\u8C61\u5927\u5C0F\u7684\u603B\u548C\u5927\u4E8E Survivor \u7A7A\u95F4\u7684\u4E00\u534A\uFF0C\u5E74\u9F84\u5927\u4E8E\u6216\u7B49\u4E8E\u8BE5\u5E74\u9F84\u7684\u5BF9\u8C61\u5C31\u53EF\u4EE5\u76F4\u63A5\u8FDB\u5165\u8001\u5E74\u4EE3\u3002</p><p>\u6BD4\u5982 Survivor \u662F 100M\uFF0CHello1 \u548C Hello2 \u90FD\u662F 3 \u5C81\uFF0C\u4E14\u603B\u548C\u8D85\u8FC7\u4E86 50M\uFF0CHello3 \u662F 4 \u5C81\uFF0C\u8FD9\u4E2A\u65F6\u5019\uFF0C\u8FD9\u4E09\u4E2A\u5BF9\u8C61\u90FD\u5C06\u5230\u8001\u5E74\u4EE3\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/whereis-the-object-7.png" alt=""></p><h3 id="\u4E94\u3001\u7A7A\u95F4\u5206\u914D\u62C5\u4FDD" tabindex="-1"><a class="header-anchor" href="#\u4E94\u3001\u7A7A\u95F4\u5206\u914D\u62C5\u4FDD" aria-hidden="true">#</a> \u4E94\u3001\u7A7A\u95F4\u5206\u914D\u62C5\u4FDD</h3><p>\u4E0A\u9762\u7684\u6D41\u7A0B\u63D0\u8FC7\uFF0C\u5B58\u6D3B\u7684\u5BF9\u8C61\u90FD\u4F1A\u653E\u5165\u53E6\u5916\u4E00\u4E2A Survivor \u7A7A\u95F4\uFF0C\u5982\u679C\u8FD9\u4E9B\u5B58\u6D3B\u7684\u5BF9\u8C61\u6BD4 Survivor \u7A7A\u95F4\u8FD8\u5927\u5462\uFF1F\u6574\u4E2A\u6D41\u7A0B\u5982\u4E0B\uFF1A</p><ul><li>Minor GC \u4E4B\u524D\uFF0C\u865A\u62DF\u673A\u4F1A\u5148\u68C0\u67E5\u8001\u5E74\u4EE3\u6700\u5927\u53EF\u7528\u7684\u8FDE\u7EED\u7A7A\u95F4\u662F\u5426\u5927\u4E8E\u65B0\u751F\u4EE3\u6240\u6709\u5BF9\u8C61\u603B\u7A7A\u95F4\uFF0C\u5982\u679C\u5927\u4E8E\uFF0C\u5219\u53D1\u8D77 Minor GC\u3002</li><li>\u5982\u679C\u5C0F\u4E8E\uFF0C\u5219\u770B HandlePromotionFailure \u6709\u6CA1\u6709\u8BBE\u7F6E\uFF0C\u5982\u679C\u6CA1\u6709\u8BBE\u7F6E\uFF0C\u5C31\u53D1\u8D77 full gc\u3002</li><li>\u5982\u679C\u8BBE\u7F6E\u4E86 HandlePromotionFailure\uFF0C\u5219\u770B\u8001\u5E74\u4EE3\u6700\u5927\u53EF\u7528\u7684\u8FDE\u7EED\u7A7A\u95F4\u662F\u5426\u5927\u4E8E\u5386\u6B21\u664B\u5347\u5230\u8001\u5E74\u4EE3\u5BF9\u8C61\u7684\u5E73\u5747\u5927\u5C0F\uFF0C\u5982\u679C\u5C0F\u4E8E\uFF0C\u5C31\u53D1\u8D77 full gc\u3002</li><li>\u5982\u679C\u5927\u4E8E\uFF0C\u53D1\u8D77 Minor GC\u3002Minor GC \u540E\uFF0C\u770B Survivor \u7A7A\u95F4\u662F\u5426\u8DB3\u591F\u5B58\u653E\u5B58\u6D3B\u5BF9\u8C61\uFF0C\u5982\u679C\u4E0D\u591F\uFF0C\u5C31\u653E\u5165\u8001\u5E74\u4EE3\uFF0C\u5982\u679C\u591F\u653E\uFF0C\u5C31\u76F4\u63A5\u5B58\u653E Survivor \u7A7A\u95F4\u3002\u5982\u679C\u8001\u5E74\u4EE3\u90FD\u4E0D\u591F\u653E\u5B58\u6D3B\u5BF9\u8C61\uFF0C\u62C5\u4FDD\u5931\u8D25\uFF08Handle Promotion Failure\uFF09\uFF0C\u53D1\u8D77 full gc\u3002</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/whereis-the-object-8.png" alt=""></p><p>\u597D\u4E86\uFF0C\u4ECA\u5929\u5C31\u5206\u4EAB\u5230\u8FD9\u513F\u5427\uFF0C\u6211\u662F\u4E8C\u54E5\u5440\uFF0C\u6211\u4EEC\u4E0B\u671F\u89C1~~</p><hr><blockquote><p>\u539F\u6587\u94FE\u63A5\uFF1Ajuejin.cn/post/7052894117105238053</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p>',32),n=[i];function h(c,p){return r(),t("div",null,n)}var l=e(o,[["render",h],["__file","whereis-the-object.html.vue"]]);export{l as default};
diff --git a/dist/assets/why-need-thread.html.08014ce1.js b/dist/assets/why-need-thread.html.8e1db849.js
similarity index 99%
rename from dist/assets/why-need-thread.html.08014ce1.js
rename to dist/assets/why-need-thread.html.8e1db849.js
index d1cf3a31..7cfed52a 100644
--- a/dist/assets/why-need-thread.html.08014ce1.js
+++ b/dist/assets/why-need-thread.html.8e1db849.js
@@ -1 +1 @@
-import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{r as a,o as p,c as s,a as t,b as o,e as l,d as r}from"./app.a0271b9c.js";const i={},c=l('<h1 id="\u8FDB\u7A0B\u4E0E\u7EBF\u7A0B\u7684\u533A\u522B\u662F\u4EC0\u4E48" tabindex="-1"><a class="header-anchor" href="#\u8FDB\u7A0B\u4E0E\u7EBF\u7A0B\u7684\u533A\u522B\u662F\u4EC0\u4E48" aria-hidden="true">#</a> \u8FDB\u7A0B\u4E0E\u7EBF\u7A0B\u7684\u533A\u522B\u662F\u4EC0\u4E48\uFF1F</h1><h2 id="\u8FDB\u7A0B\u7684\u4EA7\u751F" tabindex="-1"><a class="header-anchor" href="#\u8FDB\u7A0B\u7684\u4EA7\u751F" aria-hidden="true">#</a> \u8FDB\u7A0B\u7684\u4EA7\u751F</h2><p>\u6700\u521D\u7684\u8BA1\u7B97\u673A\u53EA\u80FD\u63A5\u53D7\u4E00\u4E9B\u7279\u5B9A\u7684\u6307\u4EE4\uFF0C\u7528\u6237\u6BCF\u8F93\u5165\u4E00\u4E2A\u6307\u4EE4\uFF0C\u8BA1\u7B97\u673A\u5C31\u505A\u51FA\u4E00\u4E2A\u64CD\u4F5C\u3002\u5F53\u7528\u6237\u5728\u601D\u8003\u6216\u8005\u8F93\u5165\u65F6\uFF0C\u8BA1\u7B97\u673A\u5C31\u5728\u7B49\u5F85\u3002\u8FD9\u6837\u6548\u7387\u975E\u5E38\u4F4E\u4E0B\uFF0C\u5728\u5F88\u591A\u65F6\u5019\uFF0C\u8BA1\u7B97\u673A\u90FD\u5904\u5728\u7B49\u5F85\u72B6\u6001\u3002</p><p><strong>\u6279\u5904\u7406\u64CD\u4F5C\u7CFB\u7EDF</strong></p><p>\u540E\u6765\u6709\u4E86<strong>\u6279\u5904\u7406\u64CD\u4F5C\u7CFB\u7EDF</strong>,\u628A\u4E00\u7CFB\u5217\u9700\u8981\u64CD\u4F5C\u7684\u6307\u4EE4\u5199\u4E0B\u6765\uFF0C\u5F62\u6210\u4E00\u4E2A\u6E05\u5355\uFF0C\u4E00\u6B21\u6027\u4EA4\u7ED9\u8BA1\u7B97\u673A\u3002\u7528\u6237\u5C06\u591A\u4E2A\u9700\u8981\u6267\u884C\u7684\u7A0B\u5E8F\u5199\u5728\u78C1\u5E26\u4E0A\uFF0C\u7136\u540E\u4EA4\u7531\u8BA1\u7B97\u673A\u53BB\u8BFB\u53D6\u5E76\u9010\u4E2A\u6267\u884C\u8FD9\u4E9B\u7A0B\u5E8F\uFF0C\u5E76\u5C06\u8F93\u51FA\u7ED3\u679C\u5199\u5728\u53E6\u4E00\u4E2A\u78C1\u5E26\u4E0A\u3002</p><p>\u6279\u5904\u7406\u64CD\u4F5C\u7CFB\u7EDF\u5728\u4E00\u5B9A\u7A0B\u5EA6\u4E0A\u63D0\u9AD8\u4E86\u8BA1\u7B97\u673A\u7684\u6548\u7387\uFF0C\u4F46\u662F\u7531\u4E8E<strong>\u6279\u5904\u7406\u64CD\u4F5C\u7CFB\u7EDF\u7684\u6307\u4EE4\u8FD0\u884C\u65B9\u5F0F\u4ECD\u7136\u662F\u4E32\u884C\u7684\uFF0C\u5185\u5B58\u4E2D\u59CB\u7EC8\u53EA\u6709\u4E00\u4E2A\u7A0B\u5E8F\u5728\u8FD0\u884C</strong>\uFF0C\u540E\u9762\u7684\u7A0B\u5E8F\u9700\u8981\u7B49\u5F85\u524D\u9762\u7684\u7A0B\u5E8F\u6267\u884C\u5B8C\u6210\u540E\u624D\u80FD\u5F00\u59CB\u6267\u884C\uFF0C\u800C\u524D\u9762\u7684\u7A0B\u5E8F\u6709\u65F6\u4F1A\u7531\u4E8EI/O\u64CD\u4F5C\u3001\u7F51\u7EDC\u7B49\u539F\u56E0\u963B\u585E\uFF0C\u6240\u4EE5<strong>\u6279\u5904\u7406\u64CD\u4F5C\u6548\u7387\u4E5F\u4E0D\u9AD8</strong>\u3002</p><p><strong>\u8FDB\u7A0B\u7684\u63D0\u51FA</strong></p><p>\u4EBA\u4EEC\u5BF9\u4E8E\u8BA1\u7B97\u673A\u7684\u6027\u80FD\u8981\u6C42\u8D8A\u6765\u8D8A\u9AD8\uFF0C\u73B0\u6709\u7684\u6279\u5904\u7406\u64CD\u4F5C\u7CFB\u7EDF\u5E76\u4E0D\u80FD\u6EE1\u8DB3\u4EBA\u4EEC\u7684\u9700\u6C42\uFF0C\u800C\u6279\u5904\u7406\u64CD\u4F5C\u7CFB\u7EDF\u7684\u74F6\u9888\u5728\u4E8E\u5185\u5B58\u4E2D\u53EA\u5B58\u5728\u4E00\u4E2A\u7A0B\u5E8F\uFF0C\u90A3\u4E48\u5185\u5B58\u4E2D\u80FD\u4E0D\u80FD\u5B58\u5728\u591A\u4E2A\u7A0B\u5E8F\u5462\uFF1F\u8FD9\u662F\u4EBA\u4EEC\u4E9F\u5F85\u89E3\u51B3\u7684\u95EE\u9898\u3002</p><p>\u4E8E\u662F\uFF0C\u79D1\u5B66\u5BB6\u4EEC\u63D0\u51FA\u4E86\u8FDB\u7A0B\u7684\u6982\u5FF5\u3002</p><p>\u8FDB\u7A0B\u5C31\u662F<strong>\u5E94\u7528\u7A0B\u5E8F\u5728\u5185\u5B58\u4E2D\u5206\u914D\u7684\u7A7A\u95F4\uFF0C\u4E5F\u5C31\u662F\u6B63\u5728\u8FD0\u884C\u7684\u7A0B\u5E8F</strong>\uFF0C\u5404\u4E2A\u8FDB\u7A0B\u4E4B\u95F4\u4E92\u4E0D\u5E72\u6270\u3002\u540C\u65F6\u8FDB\u7A0B\u4FDD\u5B58\u7740\u7A0B\u5E8F\u6BCF\u4E00\u4E2A\u65F6\u523B\u8FD0\u884C\u7684\u72B6\u6001\u3002</p><blockquote><p>\u7A0B\u5E8F\uFF1A\u7528\u67D0\u79CD\u7F16\u7A0B\u8BED\u8A00(java\u3001python\u7B49)\u7F16\u5199\uFF0C\u80FD\u591F\u5B8C\u6210\u4E00\u5B9A\u4EFB\u52A1\u6216\u8005\u529F\u80FD\u7684\u4EE3\u7801\u96C6\u5408,\u662F\u6307\u4EE4\u548C\u6570\u636E\u7684\u6709\u5E8F\u96C6\u5408\uFF0C\u662F<strong>\u4E00\u6BB5\u9759\u6001\u4EE3\u7801</strong>\u3002</p></blockquote><p>\u6B64\u65F6\uFF0CCPU\u91C7\u7528\u65F6\u95F4\u7247\u8F6E\u8F6C\u7684\u65B9\u5F0F\u8FD0\u884C\u8FDB\u7A0B\uFF1ACPU\u4E3A\u6BCF\u4E2A\u8FDB\u7A0B\u5206\u914D\u4E00\u4E2A\u65F6\u95F4\u6BB5\uFF0C\u79F0\u4F5C\u5B83\u7684\u65F6\u95F4\u7247\u3002\u5982\u679C\u5728\u65F6\u95F4\u7247\u7ED3\u675F\u65F6\u8FDB\u7A0B\u8FD8\u5728\u8FD0\u884C\uFF0C\u5219\u6682\u505C\u8FD9\u4E2A\u8FDB\u7A0B\u7684\u8FD0\u884C\uFF0C\u5E76\u4E14CPU\u5206\u914D\u7ED9\u53E6\u4E00\u4E2A\u8FDB\u7A0B\uFF08\u8FD9\u4E2A\u8FC7\u7A0B\u53EB\u505A\u4E0A\u4E0B\u6587\u5207\u6362\uFF09\u3002\u5982\u679C\u8FDB\u7A0B\u5728\u65F6\u95F4\u7247\u7ED3\u675F\u524D\u963B\u585E\u6216\u7ED3\u675F\uFF0C\u5219CPU\u7ACB\u5373\u8FDB\u884C\u5207\u6362\uFF0C\u4E0D\u7528\u7B49\u5F85\u65F6\u95F4\u7247\u7528\u5B8C\u3002</p><blockquote><p>\u5F53\u8FDB\u7A0B\u6682\u505C\u65F6\uFF0C\u5B83\u4F1A\u4FDD\u5B58\u5F53\u524D\u8FDB\u7A0B\u7684\u72B6\u6001\uFF08\u8FDB\u7A0B\u6807\u8BC6\uFF0C\u8FDB\u7A0B\u4F7F\u7528\u7684\u8D44\u6E90\u7B49\uFF09\uFF0C\u5728\u4E0B\u4E00\u6B21\u5207\u6362\u56DE\u6765\u65F6\u6839\u636E\u4E4B\u524D\u4FDD\u5B58\u7684\u72B6\u6001\u8FDB\u884C\u6062\u590D\uFF0C\u63A5\u7740\u7EE7\u7EED\u6267\u884C\u3002</p></blockquote><p>\u4F7F\u7528\u8FDB\u7A0B+CPU\u65F6\u95F4\u7247\u8F6E\u8F6C\u65B9\u5F0F\u7684\u64CD\u4F5C\u7CFB\u7EDF\uFF0C\u5728\u5B8F\u89C2\u4E0A\u770B\u8D77\u6765\u540C\u4E00\u65F6\u95F4\u6BB5\u6267\u884C\u591A\u4E2A\u4EFB\u52A1\uFF0C\u6362\u53E5\u8BDD\u8BF4\uFF0C<strong>\u8FDB\u7A0B\u8BA9\u64CD\u4F5C\u7CFB\u7EDF\u7684\u5E76\u53D1\u6210\u4E3A\u4E86\u53EF\u80FD</strong>\u3002\u867D\u7136\u5E76\u53D1\u4ECE\u5B8F\u89C2\u4E0A\u770B\u6709\u591A\u4E2A\u4EFB\u52A1\u5728\u6267\u884C\uFF0C\u4F46\u5728\u4E8B\u5B9E\u4E0A\uFF0C\u5BF9\u4E8E<strong>\u5355\u6838CPU</strong>\u6765\u8BF4\uFF0C\u4EFB\u610F\u5177\u4F53\u65F6\u523B\u90FD\u53EA\u6709\u4E00\u4E2A\u4EFB\u52A1\u5728\u5360\u7528CPU\u8D44\u6E90\u3002</p><p><strong>\u5BF9\u64CD\u4F5C\u7CFB\u7EDF\u7684\u8981\u6C42\u8FDB\u4E00\u6B65\u63D0\u9AD8</strong></p><p>\u867D\u7136\u8FDB\u7A0B\u7684\u51FA\u73B0\uFF0C\u4F7F\u5F97\u64CD\u4F5C\u7CFB\u7EDF\u7684\u6027\u80FD\u5927\u5927\u63D0\u5347\uFF0C\u4F46\u662F\u968F\u7740\u65F6\u95F4\u7684\u63A8\u79FB\uFF0C\u4EBA\u4EEC\u5E76\u4E0D\u6EE1\u8DB3\u4E00\u4E2A\u8FDB\u7A0B\u5728\u4E00\u6BB5\u65F6\u95F4\u53EA\u80FD\u505A\u4E00\u4EF6\u4E8B\u60C5\uFF0C\u5982\u679C\u4E00\u4E2A\u8FDB\u7A0B\u6709\u591A\u4E2A\u5B50\u4EFB\u52A1\u65F6\uFF0C\u53EA\u80FD\u9010\u4E2A\u5F97\u6267\u884C\u8FD9\u4E9B\u5B50\u4EFB\u52A1\uFF0C\u5F88\u5F71\u54CD\u6548\u7387\u3002</p><blockquote><p>\u6BD4\u5982\u6740\u6BD2\u8F6F\u4EF6\u5728\u68C0\u6D4B\u7528\u6237\u7535\u8111\u65F6\uFF0C\u5982\u679C\u5728\u67D0\u4E00\u9879\u68C0\u6D4B\u4E2D\u5361\u4F4F\u4E86\uFF0C\u90A3\u4E48\u540E\u9762\u7684\u68C0\u6D4B\u9879\u4E5F\u4F1A\u53D7\u5230\u5F71\u54CD\u3002\u6216\u8005\u8BF4\u5F53\u4F60\u4F7F\u7528\u6740\u6BD2\u8F6F\u4EF6\u4E2D\u7684\u626B\u63CF\u75C5\u6BD2\u529F\u80FD\u65F6\uFF0C\u5728\u626B\u63CF\u75C5\u6BD2\u7ED3\u675F\u4E4B\u524D\uFF0C\u65E0\u6CD5\u4F7F\u7528\u6740\u6BD2\u8F6F\u4EF6\u4E2D\u6E05\u7406\u5783\u573E\u7684\u529F\u80FD\uFF0C\u8FD9\u663E\u7136\u65E0\u6CD5\u6EE1\u8DB3\u4EBA\u4EEC\u7684\u8981\u6C42\u3002</p></blockquote><h2 id="\u7EBF\u7A0B\u7684\u63D0\u51FA" tabindex="-1"><a class="header-anchor" href="#\u7EBF\u7A0B\u7684\u63D0\u51FA" aria-hidden="true">#</a> \u7EBF\u7A0B\u7684\u63D0\u51FA</h2><p>\u90A3\u4E48\u80FD\u4E0D\u80FD\u8BA9\u8FD9\u4E9B\u5B50\u4EFB\u52A1\u540C\u65F6\u6267\u884C\u5462\uFF1F\u4E8E\u662F\u4EBA\u4EEC\u53C8\u63D0\u51FA\u4E86\u7EBF\u7A0B\u7684\u6982\u5FF5\uFF0C<strong>\u8BA9\u4E00\u4E2A\u7EBF\u7A0B\u6267\u884C\u4E00\u4E2A\u5B50\u4EFB\u52A1\uFF0C\u8FD9\u6837\u4E00\u4E2A\u8FDB\u7A0B\u5C31\u5305\u542B\u4E86\u591A\u4E2A\u7EBF\u7A0B\uFF0C\u6BCF\u4E2A\u7EBF\u7A0B\u8D1F\u8D23\u4E00\u4E2A\u5355\u72EC\u7684\u5B50\u4EFB\u52A1\u3002</strong></p><blockquote><p>\u4F7F\u7528\u7EBF\u7A0B\u4E4B\u540E\uFF0C\u4E8B\u60C5\u5C31\u53D8\u5F97\u7B80\u5355\u591A\u4E86\u3002\u5F53\u7528\u6237\u4F7F\u7528\u626B\u63CF\u75C5\u6BD2\u529F\u80FD\u65F6\uFF0C\u5C31\u8BA9\u626B\u63CF\u75C5\u6BD2\u8FD9\u4E2A\u7EBF\u7A0B\u53BB\u6267\u884C\u3002\u540C\u65F6\uFF0C\u5982\u679C\u7528\u6237\u53C8\u4F7F\u7528\u6E05\u7406\u5783\u573E\u529F\u80FD\uFF0C\u90A3\u4E48\u53EF\u4EE5\u5148\u6682\u505C\u626B\u63CF\u75C5\u6BD2\u7EBF\u7A0B\uFF0C\u5148\u54CD\u5E94\u7528\u6237\u7684\u6E05\u7406\u5783\u573E\u7684\u64CD\u4F5C\uFF0C\u8BA9\u6E05\u7406\u5783\u573E\u8FD9\u4E2A\u7EBF\u7A0B\u53BB\u6267\u884C\u3002\u54CD\u5E94\u5B8C\u540E\u518D\u5207\u6362\u56DE\u6765\uFF0C\u63A5\u7740\u6267\u884C\u626B\u63CF\u75C5\u6BD2\u7EBF\u7A0B\u3002</p><p>\u6CE8\u610F\uFF1A\u64CD\u4F5C\u7CFB\u7EDF\u662F\u5982\u4F55\u5206\u914D\u65F6\u95F4\u7247\u7ED9\u6BCF\u4E00\u4E2A\u7EBF\u7A0B\u7684\uFF0C\u6D89\u53CA\u5230\u7EBF\u7A0B\u7684\u8C03\u5EA6\u7B56\u7565\uFF0C\u6709\u5174\u8DA3\u7684\u540C\u5B66\u53EF\u4EE5\u770B\u4E00\u4E0B\u300A\u64CD\u4F5C\u7CFB\u7EDF\u300B\uFF0C\u672C\u6587\u4E0D\u505A\u6DF1\u5165\u8BE6\u89E3\u3002</p></blockquote><p>\u603B\u4E4B\uFF0C\u8FDB\u7A0B\u548C\u7EBF\u7A0B\u7684\u63D0\u51FA\u6781\u5927\u7684\u63D0\u9AD8\u4E86\u64CD\u4F5C\u7CFB\u7EDF\u7684\u6027\u80FD\u3002<strong>\u8FDB\u7A0B\u8BA9\u64CD\u4F5C\u7CFB\u7EDF\u7684\u5E76\u53D1\u6027\u6210\u4E3A\u4E86\u53EF\u80FD\uFF0C\u800C\u7EBF\u7A0B\u8BA9\u8FDB\u7A0B\u7684\u5185\u90E8\u5E76\u53D1\u6210\u4E3A\u4E86\u53EF\u80FD\u3002</strong></p><p><strong>\u591A\u8FDB\u7A0B\u7684\u65B9\u5F0F\u4E5F\u53EF\u4EE5\u5B9E\u73B0\u5E76\u53D1\uFF0C\u4E3A\u4EC0\u4E48\u6211\u4EEC\u8981\u4F7F\u7528\u591A\u7EBF\u7A0B\uFF1F</strong></p><p>\u591A\u8FDB\u7A0B\u65B9\u5F0F\u786E\u5B9E\u53EF\u4EE5\u5B9E\u73B0\u5E76\u53D1\uFF0C\u4F46\u4F7F\u7528\u591A\u7EBF\u7A0B\uFF0C\u6709\u4EE5\u4E0B\u51E0\u4E2A\u597D\u5904\uFF1A</p><ul><li>\u8FDB\u7A0B\u95F4\u7684\u901A\u4FE1\u6BD4\u8F83\u590D\u6742\uFF0C\u800C\u7EBF\u7A0B\u95F4\u7684\u901A\u4FE1\u6BD4\u8F83\u7B80\u5355\uFF0C\u901A\u5E38\u60C5\u51B5\u4E0B\uFF0C\u6211\u4EEC\u9700\u8981\u4F7F\u7528\u5171\u4EAB\u8D44\u6E90\uFF0C\u8FD9\u4E9B\u8D44\u6E90\u5728\u7EBF\u7A0B\u95F4\u7684\u901A\u4FE1\u6BD4\u8F83\u5BB9\u6613\u3002</li><li>\u8FDB\u7A0B\u662F\u91CD\u91CF\u7EA7\u7684\uFF0C\u800C\u7EBF\u7A0B\u662F\u8F7B\u91CF\u7EA7\u7684\uFF0C\u6545\u591A\u7EBF\u7A0B\u65B9\u5F0F\u7684\u7CFB\u7EDF\u5F00\u9500\u66F4\u5C0F\u3002</li></ul><p><strong>\u8FDB\u7A0B\u548C\u7EBF\u7A0B\u7684\u533A\u522B</strong></p><p>\u8FDB\u7A0B\u662F\u4E00\u4E2A\u72EC\u7ACB\u7684\u8FD0\u884C\u73AF\u5883\uFF0C\u800C\u7EBF\u7A0B\u662F\u5728\u8FDB\u7A0B\u4E2D\u6267\u884C\u7684\u4E00\u4E2A\u4EFB\u52A1\u3002\u4ED6\u4EEC\u4E24\u4E2A\u672C\u8D28\u7684\u533A\u522B\u662F<strong>\u662F\u5426\u5355\u72EC\u5360\u6709\u5185\u5B58\u5730\u5740\u7A7A\u95F4\u53CA\u5176\u5B83\u7CFB\u7EDF\u8D44\u6E90\uFF08\u6BD4\u5982I/O\uFF09</strong>\uFF1A</p><ul><li><p>\u8FDB\u7A0B\u5355\u72EC\u5360\u6709\u4E00\u5B9A\u7684\u5185\u5B58\u5730\u5740\u7A7A\u95F4\uFF0C\u6240\u4EE5\u8FDB\u7A0B\u95F4\u5B58\u5728\u5185\u5B58\u9694\u79BB\uFF0C\u6570\u636E\u662F\u5206\u5F00\u7684\uFF0C\u6570\u636E\u5171\u4EAB\u590D\u6742\u4F46\u662F\u540C\u6B65\u7B80\u5355\uFF0C\u5404\u4E2A\u8FDB\u7A0B\u4E4B\u95F4\u4E92\u4E0D\u5E72\u6270\uFF1B\u800C\u7EBF\u7A0B\u5171\u4EAB\u6240\u5C5E\u8FDB\u7A0B\u5360\u6709\u7684\u5185\u5B58\u5730\u5740\u7A7A\u95F4\u548C\u8D44\u6E90\uFF0C\u6570\u636E\u5171\u4EAB\u7B80\u5355\uFF0C\u4F46\u662F\u540C\u6B65\u590D\u6742\u3002</p></li><li><p>\u8FDB\u7A0B\u5355\u72EC\u5360\u6709\u4E00\u5B9A\u7684\u5185\u5B58\u5730\u5740\u7A7A\u95F4\uFF0C\u4E00\u4E2A\u8FDB\u7A0B\u51FA\u73B0\u95EE\u9898\u4E0D\u4F1A\u5F71\u54CD\u5176\u4ED6\u8FDB\u7A0B\uFF0C\u4E0D\u5F71\u54CD\u4E3B\u7A0B\u5E8F\u7684\u7A33\u5B9A\u6027\uFF0C\u53EF\u9760\u6027\u9AD8\uFF1B\u4E00\u4E2A\u7EBF\u7A0B\u5D29\u6E83\u53EF\u80FD\u5F71\u54CD\u6574\u4E2A\u7A0B\u5E8F\u7684\u7A33\u5B9A\u6027\uFF0C\u53EF\u9760\u6027\u8F83\u4F4E\u3002</p></li><li><p>\u8FDB\u7A0B\u5355\u72EC\u5360\u6709\u4E00\u5B9A\u7684\u5185\u5B58\u5730\u5740\u7A7A\u95F4\uFF0C\u8FDB\u7A0B\u7684\u521B\u5EFA\u548C\u9500\u6BC1\u4E0D\u4EC5\u9700\u8981\u4FDD\u5B58\u5BC4\u5B58\u5668\u548C\u6808\u4FE1\u606F\uFF0C\u8FD8\u9700\u8981\u8D44\u6E90\u7684\u5206\u914D\u56DE\u6536\u4EE5\u53CA\u9875\u8C03\u5EA6\uFF0C\u5F00\u9500\u8F83\u5927\uFF1B\u7EBF\u7A0B\u53EA\u9700\u8981\u4FDD\u5B58\u5BC4\u5B58\u5668\u548C\u6808\u4FE1\u606F\uFF0C\u5F00\u9500\u8F83\u5C0F\u3002</p></li></ul><p>\u53E6\u5916\u4E00\u4E2A\u91CD\u8981\u533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noreferrer"},C=r("Java\u516B\u80A1\u6587"),f=t("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png"},null,-1);function P(U,k){const e=a("ExternalLinkIcon");return p(),s("div",null,[c,t("blockquote",null,[h,t("ul",null,[t("li",null,[t("a",g,[d,o(e)])]),t("li",null,[t("a",u,[_,o(e)])]),t("li",null,[t("a",b,[C,o(e)])])])]),f])}var x=n(i,[["render",P],["__file","why-need-thread.html.vue"]]);export{x as default};
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\u8FDB\u7A0B\u7684\u4EA7\u751F</h2><p>\u6700\u521D\u7684\u8BA1\u7B97\u673A\u53EA\u80FD\u63A5\u53D7\u4E00\u4E9B\u7279\u5B9A\u7684\u6307\u4EE4\uFF0C\u7528\u6237\u6BCF\u8F93\u5165\u4E00\u4E2A\u6307\u4EE4\uFF0C\u8BA1\u7B97\u673A\u5C31\u505A\u51FA\u4E00\u4E2A\u64CD\u4F5C\u3002\u5F53\u7528\u6237\u5728\u601D\u8003\u6216\u8005\u8F93\u5165\u65F6\uFF0C\u8BA1\u7B97\u673A\u5C31\u5728\u7B49\u5F85\u3002\u8FD9\u6837\u6548\u7387\u975E\u5E38\u4F4E\u4E0B\uFF0C\u5728\u5F88\u591A\u65F6\u5019\uFF0C\u8BA1\u7B97\u673A\u90FD\u5904\u5728\u7B49\u5F85\u72B6\u6001\u3002</p><p><strong>\u6279\u5904\u7406\u64CD\u4F5C\u7CFB\u7EDF</strong></p><p>\u540E\u6765\u6709\u4E86<strong>\u6279\u5904\u7406\u64CD\u4F5C\u7CFB\u7EDF</strong>,\u628A\u4E00\u7CFB\u5217\u9700\u8981\u64CD\u4F5C\u7684\u6307\u4EE4\u5199\u4E0B\u6765\uFF0C\u5F62\u6210\u4E00\u4E2A\u6E05\u5355\uFF0C\u4E00\u6B21\u6027\u4EA4\u7ED9\u8BA1\u7B97\u673A\u3002\u7528\u6237\u5C06\u591A\u4E2A\u9700\u8981\u6267\u884C\u7684\u7A0B\u5E8F\u5199\u5728\u78C1\u5E26\u4E0A\uFF0C\u7136\u540E\u4EA4\u7531\u8BA1\u7B97\u673A\u53BB\u8BFB\u53D6\u5E76\u9010\u4E2A\u6267\u884C\u8FD9\u4E9B\u7A0B\u5E8F\uFF0C\u5E76\u5C06\u8F93\u51FA\u7ED3\u679C\u5199\u5728\u53E6\u4E00\u4E2A\u78C1\u5E26\u4E0A\u3002</p><p>\u6279\u5904\u7406\u64CD\u4F5C\u7CFB\u7EDF\u5728\u4E00\u5B9A\u7A0B\u5EA6\u4E0A\u63D0\u9AD8\u4E86\u8BA1\u7B97\u673A\u7684\u6548\u7387\uFF0C\u4F46\u662F\u7531\u4E8E<strong>\u6279\u5904\u7406\u64CD\u4F5C\u7CFB\u7EDF\u7684\u6307\u4EE4\u8FD0\u884C\u65B9\u5F0F\u4ECD\u7136\u662F\u4E32\u884C\u7684\uFF0C\u5185\u5B58\u4E2D\u59CB\u7EC8\u53EA\u6709\u4E00\u4E2A\u7A0B\u5E8F\u5728\u8FD0\u884C</strong>\uFF0C\u540E\u9762\u7684\u7A0B\u5E8F\u9700\u8981\u7B49\u5F85\u524D\u9762\u7684\u7A0B\u5E8F\u6267\u884C\u5B8C\u6210\u540E\u624D\u80FD\u5F00\u59CB\u6267\u884C\uFF0C\u800C\u524D\u9762\u7684\u7A0B\u5E8F\u6709\u65F6\u4F1A\u7531\u4E8EI/O\u64CD\u4F5C\u3001\u7F51\u7EDC\u7B49\u539F\u56E0\u963B\u585E\uFF0C\u6240\u4EE5<strong>\u6279\u5904\u7406\u64CD\u4F5C\u6548\u7387\u4E5F\u4E0D\u9AD8</strong>\u3002</p><p><strong>\u8FDB\u7A0B\u7684\u63D0\u51FA</strong></p><p>\u4EBA\u4EEC\u5BF9\u4E8E\u8BA1\u7B97\u673A\u7684\u6027\u80FD\u8981\u6C42\u8D8A\u6765\u8D8A\u9AD8\uFF0C\u73B0\u6709\u7684\u6279\u5904\u7406\u64CD\u4F5C\u7CFB\u7EDF\u5E76\u4E0D\u80FD\u6EE1\u8DB3\u4EBA\u4EEC\u7684\u9700\u6C42\uFF0C\u800C\u6279\u5904\u7406\u64CD\u4F5C\u7CFB\u7EDF\u7684\u74F6\u9888\u5728\u4E8E\u5185\u5B58\u4E2D\u53EA\u5B58\u5728\u4E00\u4E2A\u7A0B\u5E8F\uFF0C\u90A3\u4E48\u5185\u5B58\u4E2D\u80FD\u4E0D\u80FD\u5B58\u5728\u591A\u4E2A\u7A0B\u5E8F\u5462\uFF1F\u8FD9\u662F\u4EBA\u4EEC\u4E9F\u5F85\u89E3\u51B3\u7684\u95EE\u9898\u3002</p><p>\u4E8E\u662F\uFF0C\u79D1\u5B66\u5BB6\u4EEC\u63D0\u51FA\u4E86\u8FDB\u7A0B\u7684\u6982\u5FF5\u3002</p><p>\u8FDB\u7A0B\u5C31\u662F<strong>\u5E94\u7528\u7A0B\u5E8F\u5728\u5185\u5B58\u4E2D\u5206\u914D\u7684\u7A7A\u95F4\uFF0C\u4E5F\u5C31\u662F\u6B63\u5728\u8FD0\u884C\u7684\u7A0B\u5E8F</strong>\uFF0C\u5404\u4E2A\u8FDB\u7A0B\u4E4B\u95F4\u4E92\u4E0D\u5E72\u6270\u3002\u540C\u65F6\u8FDB\u7A0B\u4FDD\u5B58\u7740\u7A0B\u5E8F\u6BCF\u4E00\u4E2A\u65F6\u523B\u8FD0\u884C\u7684\u72B6\u6001\u3002</p><blockquote><p>\u7A0B\u5E8F\uFF1A\u7528\u67D0\u79CD\u7F16\u7A0B\u8BED\u8A00(java\u3001python\u7B49)\u7F16\u5199\uFF0C\u80FD\u591F\u5B8C\u6210\u4E00\u5B9A\u4EFB\u52A1\u6216\u8005\u529F\u80FD\u7684\u4EE3\u7801\u96C6\u5408,\u662F\u6307\u4EE4\u548C\u6570\u636E\u7684\u6709\u5E8F\u96C6\u5408\uFF0C\u662F<strong>\u4E00\u6BB5\u9759\u6001\u4EE3\u7801</strong>\u3002</p></blockquote><p>\u6B64\u65F6\uFF0CCPU\u91C7\u7528\u65F6\u95F4\u7247\u8F6E\u8F6C\u7684\u65B9\u5F0F\u8FD0\u884C\u8FDB\u7A0B\uFF1ACPU\u4E3A\u6BCF\u4E2A\u8FDB\u7A0B\u5206\u914D\u4E00\u4E2A\u65F6\u95F4\u6BB5\uFF0C\u79F0\u4F5C\u5B83\u7684\u65F6\u95F4\u7247\u3002\u5982\u679C\u5728\u65F6\u95F4\u7247\u7ED3\u675F\u65F6\u8FDB\u7A0B\u8FD8\u5728\u8FD0\u884C\uFF0C\u5219\u6682\u505C\u8FD9\u4E2A\u8FDB\u7A0B\u7684\u8FD0\u884C\uFF0C\u5E76\u4E14CPU\u5206\u914D\u7ED9\u53E6\u4E00\u4E2A\u8FDB\u7A0B\uFF08\u8FD9\u4E2A\u8FC7\u7A0B\u53EB\u505A\u4E0A\u4E0B\u6587\u5207\u6362\uFF09\u3002\u5982\u679C\u8FDB\u7A0B\u5728\u65F6\u95F4\u7247\u7ED3\u675F\u524D\u963B\u585E\u6216\u7ED3\u675F\uFF0C\u5219CPU\u7ACB\u5373\u8FDB\u884C\u5207\u6362\uFF0C\u4E0D\u7528\u7B49\u5F85\u65F6\u95F4\u7247\u7528\u5B8C\u3002</p><blockquote><p>\u5F53\u8FDB\u7A0B\u6682\u505C\u65F6\uFF0C\u5B83\u4F1A\u4FDD\u5B58\u5F53\u524D\u8FDB\u7A0B\u7684\u72B6\u6001\uFF08\u8FDB\u7A0B\u6807\u8BC6\uFF0C\u8FDB\u7A0B\u4F7F\u7528\u7684\u8D44\u6E90\u7B49\uFF09\uFF0C\u5728\u4E0B\u4E00\u6B21\u5207\u6362\u56DE\u6765\u65F6\u6839\u636E\u4E4B\u524D\u4FDD\u5B58\u7684\u72B6\u6001\u8FDB\u884C\u6062\u590D\uFF0C\u63A5\u7740\u7EE7\u7EED\u6267\u884C\u3002</p></blockquote><p>\u4F7F\u7528\u8FDB\u7A0B+CPU\u65F6\u95F4\u7247\u8F6E\u8F6C\u65B9\u5F0F\u7684\u64CD\u4F5C\u7CFB\u7EDF\uFF0C\u5728\u5B8F\u89C2\u4E0A\u770B\u8D77\u6765\u540C\u4E00\u65F6\u95F4\u6BB5\u6267\u884C\u591A\u4E2A\u4EFB\u52A1\uFF0C\u6362\u53E5\u8BDD\u8BF4\uFF0C<strong>\u8FDB\u7A0B\u8BA9\u64CD\u4F5C\u7CFB\u7EDF\u7684\u5E76\u53D1\u6210\u4E3A\u4E86\u53EF\u80FD</strong>\u3002\u867D\u7136\u5E76\u53D1\u4ECE\u5B8F\u89C2\u4E0A\u770B\u6709\u591A\u4E2A\u4EFB\u52A1\u5728\u6267\u884C\uFF0C\u4F46\u5728\u4E8B\u5B9E\u4E0A\uFF0C\u5BF9\u4E8E<strong>\u5355\u6838CPU</strong>\u6765\u8BF4\uFF0C\u4EFB\u610F\u5177\u4F53\u65F6\u523B\u90FD\u53EA\u6709\u4E00\u4E2A\u4EFB\u52A1\u5728\u5360\u7528CPU\u8D44\u6E90\u3002</p><p><strong>\u5BF9\u64CD\u4F5C\u7CFB\u7EDF\u7684\u8981\u6C42\u8FDB\u4E00\u6B65\u63D0\u9AD8</strong></p><p>\u867D\u7136\u8FDB\u7A0B\u7684\u51FA\u73B0\uFF0C\u4F7F\u5F97\u64CD\u4F5C\u7CFB\u7EDF\u7684\u6027\u80FD\u5927\u5927\u63D0\u5347\uFF0C\u4F46\u662F\u968F\u7740\u65F6\u95F4\u7684\u63A8\u79FB\uFF0C\u4EBA\u4EEC\u5E76\u4E0D\u6EE1\u8DB3\u4E00\u4E2A\u8FDB\u7A0B\u5728\u4E00\u6BB5\u65F6\u95F4\u53EA\u80FD\u505A\u4E00\u4EF6\u4E8B\u60C5\uFF0C\u5982\u679C\u4E00\u4E2A\u8FDB\u7A0B\u6709\u591A\u4E2A\u5B50\u4EFB\u52A1\u65F6\uFF0C\u53EA\u80FD\u9010\u4E2A\u5F97\u6267\u884C\u8FD9\u4E9B\u5B50\u4EFB\u52A1\uFF0C\u5F88\u5F71\u54CD\u6548\u7387\u3002</p><blockquote><p>\u6BD4\u5982\u6740\u6BD2\u8F6F\u4EF6\u5728\u68C0\u6D4B\u7528\u6237\u7535\u8111\u65F6\uFF0C\u5982\u679C\u5728\u67D0\u4E00\u9879\u68C0\u6D4B\u4E2D\u5361\u4F4F\u4E86\uFF0C\u90A3\u4E48\u540E\u9762\u7684\u68C0\u6D4B\u9879\u4E5F\u4F1A\u53D7\u5230\u5F71\u54CD\u3002\u6216\u8005\u8BF4\u5F53\u4F60\u4F7F\u7528\u6740\u6BD2\u8F6F\u4EF6\u4E2D\u7684\u626B\u63CF\u75C5\u6BD2\u529F\u80FD\u65F6\uFF0C\u5728\u626B\u63CF\u75C5\u6BD2\u7ED3\u675F\u4E4B\u524D\uFF0C\u65E0\u6CD5\u4F7F\u7528\u6740\u6BD2\u8F6F\u4EF6\u4E2D\u6E05\u7406\u5783\u573E\u7684\u529F\u80FD\uFF0C\u8FD9\u663E\u7136\u65E0\u6CD5\u6EE1\u8DB3\u4EBA\u4EEC\u7684\u8981\u6C42\u3002</p></blockquote><h2 id="\u7EBF\u7A0B\u7684\u63D0\u51FA" tabindex="-1"><a class="header-anchor" href="#\u7EBF\u7A0B\u7684\u63D0\u51FA" aria-hidden="true">#</a> \u7EBF\u7A0B\u7684\u63D0\u51FA</h2><p>\u90A3\u4E48\u80FD\u4E0D\u80FD\u8BA9\u8FD9\u4E9B\u5B50\u4EFB\u52A1\u540C\u65F6\u6267\u884C\u5462\uFF1F\u4E8E\u662F\u4EBA\u4EEC\u53C8\u63D0\u51FA\u4E86\u7EBF\u7A0B\u7684\u6982\u5FF5\uFF0C<strong>\u8BA9\u4E00\u4E2A\u7EBF\u7A0B\u6267\u884C\u4E00\u4E2A\u5B50\u4EFB\u52A1\uFF0C\u8FD9\u6837\u4E00\u4E2A\u8FDB\u7A0B\u5C31\u5305\u542B\u4E86\u591A\u4E2A\u7EBF\u7A0B\uFF0C\u6BCF\u4E2A\u7EBF\u7A0B\u8D1F\u8D23\u4E00\u4E2A\u5355\u72EC\u7684\u5B50\u4EFB\u52A1\u3002</strong></p><blockquote><p>\u4F7F\u7528\u7EBF\u7A0B\u4E4B\u540E\uFF0C\u4E8B\u60C5\u5C31\u53D8\u5F97\u7B80\u5355\u591A\u4E86\u3002\u5F53\u7528\u6237\u4F7F\u7528\u626B\u63CF\u75C5\u6BD2\u529F\u80FD\u65F6\uFF0C\u5C31\u8BA9\u626B\u63CF\u75C5\u6BD2\u8FD9\u4E2A\u7EBF\u7A0B\u53BB\u6267\u884C\u3002\u540C\u65F6\uFF0C\u5982\u679C\u7528\u6237\u53C8\u4F7F\u7528\u6E05\u7406\u5783\u573E\u529F\u80FD\uFF0C\u90A3\u4E48\u53EF\u4EE5\u5148\u6682\u505C\u626B\u63CF\u75C5\u6BD2\u7EBF\u7A0B\uFF0C\u5148\u54CD\u5E94\u7528\u6237\u7684\u6E05\u7406\u5783\u573E\u7684\u64CD\u4F5C\uFF0C\u8BA9\u6E05\u7406\u5783\u573E\u8FD9\u4E2A\u7EBF\u7A0B\u53BB\u6267\u884C\u3002\u54CD\u5E94\u5B8C\u540E\u518D\u5207\u6362\u56DE\u6765\uFF0C\u63A5\u7740\u6267\u884C\u626B\u63CF\u75C5\u6BD2\u7EBF\u7A0B\u3002</p><p>\u6CE8\u610F\uFF1A\u64CD\u4F5C\u7CFB\u7EDF\u662F\u5982\u4F55\u5206\u914D\u65F6\u95F4\u7247\u7ED9\u6BCF\u4E00\u4E2A\u7EBF\u7A0B\u7684\uFF0C\u6D89\u53CA\u5230\u7EBF\u7A0B\u7684\u8C03\u5EA6\u7B56\u7565\uFF0C\u6709\u5174\u8DA3\u7684\u540C\u5B66\u53EF\u4EE5\u770B\u4E00\u4E0B\u300A\u64CD\u4F5C\u7CFB\u7EDF\u300B\uFF0C\u672C\u6587\u4E0D\u505A\u6DF1\u5165\u8BE6\u89E3\u3002</p></blockquote><p>\u603B\u4E4B\uFF0C\u8FDB\u7A0B\u548C\u7EBF\u7A0B\u7684\u63D0\u51FA\u6781\u5927\u7684\u63D0\u9AD8\u4E86\u64CD\u4F5C\u7CFB\u7EDF\u7684\u6027\u80FD\u3002<strong>\u8FDB\u7A0B\u8BA9\u64CD\u4F5C\u7CFB\u7EDF\u7684\u5E76\u53D1\u6027\u6210\u4E3A\u4E86\u53EF\u80FD\uFF0C\u800C\u7EBF\u7A0B\u8BA9\u8FDB\u7A0B\u7684\u5185\u90E8\u5E76\u53D1\u6210\u4E3A\u4E86\u53EF\u80FD\u3002</strong></p><p><strong>\u591A\u8FDB\u7A0B\u7684\u65B9\u5F0F\u4E5F\u53EF\u4EE5\u5B9E\u73B0\u5E76\u53D1\uFF0C\u4E3A\u4EC0\u4E48\u6211\u4EEC\u8981\u4F7F\u7528\u591A\u7EBF\u7A0B\uFF1F</strong></p><p>\u591A\u8FDB\u7A0B\u65B9\u5F0F\u786E\u5B9E\u53EF\u4EE5\u5B9E\u73B0\u5E76\u53D1\uFF0C\u4F46\u4F7F\u7528\u591A\u7EBF\u7A0B\uFF0C\u6709\u4EE5\u4E0B\u51E0\u4E2A\u597D\u5904\uFF1A</p><ul><li>\u8FDB\u7A0B\u95F4\u7684\u901A\u4FE1\u6BD4\u8F83\u590D\u6742\uFF0C\u800C\u7EBF\u7A0B\u95F4\u7684\u901A\u4FE1\u6BD4\u8F83\u7B80\u5355\uFF0C\u901A\u5E38\u60C5\u51B5\u4E0B\uFF0C\u6211\u4EEC\u9700\u8981\u4F7F\u7528\u5171\u4EAB\u8D44\u6E90\uFF0C\u8FD9\u4E9B\u8D44\u6E90\u5728\u7EBF\u7A0B\u95F4\u7684\u901A\u4FE1\u6BD4\u8F83\u5BB9\u6613\u3002</li><li>\u8FDB\u7A0B\u662F\u91CD\u91CF\u7EA7\u7684\uFF0C\u800C\u7EBF\u7A0B\u662F\u8F7B\u91CF\u7EA7\u7684\uFF0C\u6545\u591A\u7EBF\u7A0B\u65B9\u5F0F\u7684\u7CFB\u7EDF\u5F00\u9500\u66F4\u5C0F\u3002</li></ul><p><strong>\u8FDB\u7A0B\u548C\u7EBF\u7A0B\u7684\u533A\u522B</strong></p><p>\u8FDB\u7A0B\u662F\u4E00\u4E2A\u72EC\u7ACB\u7684\u8FD0\u884C\u73AF\u5883\uFF0C\u800C\u7EBF\u7A0B\u662F\u5728\u8FDB\u7A0B\u4E2D\u6267\u884C\u7684\u4E00\u4E2A\u4EFB\u52A1\u3002\u4ED6\u4EEC\u4E24\u4E2A\u672C\u8D28\u7684\u533A\u522B\u662F<strong>\u662F\u5426\u5355\u72EC\u5360\u6709\u5185\u5B58\u5730\u5740\u7A7A\u95F4\u53CA\u5176\u5B83\u7CFB\u7EDF\u8D44\u6E90\uFF08\u6BD4\u5982I/O\uFF09</strong>\uFF1A</p><ul><li><p>\u8FDB\u7A0B\u5355\u72EC\u5360\u6709\u4E00\u5B9A\u7684\u5185\u5B58\u5730\u5740\u7A7A\u95F4\uFF0C\u6240\u4EE5\u8FDB\u7A0B\u95F4\u5B58\u5728\u5185\u5B58\u9694\u79BB\uFF0C\u6570\u636E\u662F\u5206\u5F00\u7684\uFF0C\u6570\u636E\u5171\u4EAB\u590D\u6742\u4F46\u662F\u540C\u6B65\u7B80\u5355\uFF0C\u5404\u4E2A\u8FDB\u7A0B\u4E4B\u95F4\u4E92\u4E0D\u5E72\u6270\uFF1B\u800C\u7EBF\u7A0B\u5171\u4EAB\u6240\u5C5E\u8FDB\u7A0B\u5360\u6709\u7684\u5185\u5B58\u5730\u5740\u7A7A\u95F4\u548C\u8D44\u6E90\uFF0C\u6570\u636E\u5171\u4EAB\u7B80\u5355\uFF0C\u4F46\u662F\u540C\u6B65\u590D\u6742\u3002</p></li><li><p>\u8FDB\u7A0B\u5355\u72EC\u5360\u6709\u4E00\u5B9A\u7684\u5185\u5B58\u5730\u5740\u7A7A\u95F4\uFF0C\u4E00\u4E2A\u8FDB\u7A0B\u51FA\u73B0\u95EE\u9898\u4E0D\u4F1A\u5F71\u54CD\u5176\u4ED6\u8FDB\u7A0B\uFF0C\u4E0D\u5F71\u54CD\u4E3B\u7A0B\u5E8F\u7684\u7A33\u5B9A\u6027\uFF0C\u53EF\u9760\u6027\u9AD8\uFF1B\u4E00\u4E2A\u7EBF\u7A0B\u5D29\u6E83\u53EF\u80FD\u5F71\u54CD\u6574\u4E2A\u7A0B\u5E8F\u7684\u7A33\u5B9A\u6027\uFF0C\u53EF\u9760\u6027\u8F83\u4F4E\u3002</p></li><li><p>\u8FDB\u7A0B\u5355\u72EC\u5360\u6709\u4E00\u5B9A\u7684\u5185\u5B58\u5730\u5740\u7A7A\u95F4\uFF0C\u8FDB\u7A0B\u7684\u521B\u5EFA\u548C\u9500\u6BC1\u4E0D\u4EC5\u9700\u8981\u4FDD\u5B58\u5BC4\u5B58\u5668\u548C\u6808\u4FE1\u606F\uFF0C\u8FD8\u9700\u8981\u8D44\u6E90\u7684\u5206\u914D\u56DE\u6536\u4EE5\u53CA\u9875\u8C03\u5EA6\uFF0C\u5F00\u9500\u8F83\u5927\uFF1B\u7EBF\u7A0B\u53EA\u9700\u8981\u4FDD\u5B58\u5BC4\u5B58\u5668\u548C\u6808\u4FE1\u606F\uFF0C\u5F00\u9500\u8F83\u5C0F\u3002</p></li></ul><p>\u53E6\u5916\u4E00\u4E2A\u91CD\u8981\u533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i7\u5C31\u53EF\u4EE5\u8FBE\u52304\u6838\u5FC3\u751A\u81F38\u6838\u5FC3\u3002\u800C\u4E13\u4E1A\u670D\u52A1\u5668\u5219\u901A\u5E38\u53EF\u4EE5\u8FBE\u5230\u51E0\u4E2A\u72EC\u7ACB\u7684CPU\uFF0C\u6BCF\u4E00\u4E2ACPU\u751A\u81F3\u62E5\u6709\u591A\u8FBE8\u4E2A\u4EE5\u4E0A\u7684\u5185\u6838\u3002\u56E0\u6B64\uFF0C\u6469\u5C14\u5B9A\u5F8B\u4F3C\u4E4E\u5728CPU\u6838\u5FC3\u6269\u5C55\u4E0A\u7EE7\u7EED\u5F97\u5230\u4F53\u9A8C\u3002\u56E0\u6B64\uFF0C\u591A\u6838\u7684CPU\u7684\u80CC\u666F\u4E0B\uFF0C\u50AC\u751F\u4E86\u5E76\u53D1\u7F16\u7A0B\u7684\u8D8B\u52BF\uFF0C\u901A\u8FC7<strong>\u5E76\u53D1\u7F16\u7A0B\u7684\u5F62\u5F0F\u53EF\u4EE5\u5C06\u591A\u6838CPU\u7684\u8BA1\u7B97\u80FD\u529B\u53D1\u6325\u5230\u6781\u81F4\uFF0C\u6027\u80FD\u5F97\u5230\u63D0\u5347</strong>\u3002</p><p>\u9876\u7EA7\u8BA1\u7B97\u673A\u79D1\u5B66\u5BB6Donald Ervin Knuth\u5982\u6B64\u8BC4\u4EF7\u8FD9\u79CD\u60C5\u51B5\uFF1A\u5728\u6211\u770B\u6765\uFF0C\u8FD9\u79CD\u73B0\u8C61\uFF08\u5E76\u53D1\uFF09\u6216\u591A\u6216\u5C11\u662F\u7531\u4E8E\u786C\u4EF6\u8BBE\u8BA1\u8005\u65E0\u8BA1\u53EF\u65BD\u4E86\u5BFC\u81F4\u7684\uFF0C\u4ED6\u4EEC\u5C06\u6469\u5C14\u5B9A\u5F8B\u7684\u8D23\u4EFB\u63A8\u7ED9\u4E86\u8F6F\u4EF6\u5F00\u53D1\u8005\u3002</p><p>\u53E6\u5916\uFF0C\u5728\u7279\u6B8A\u7684\u4E1A\u52A1\u573A\u666F\u4E0B\u5148\u5929\u7684\u5C31\u9002\u5408\u4E8E\u5E76\u53D1\u7F16\u7A0B\u3002\u6BD4\u5982\u5728\u56FE\u50CF\u5904\u7406\u9886\u57DF\uFF0C\u4E00\u5F201024X768\u50CF\u7D20\u7684\u56FE\u7247\uFF0C\u5305\u542B\u8FBE\u523078\u4E076\u5343\u591A\u4E2A\u50CF\u7D20\u3002\u5373\u65F6\u5C06\u6240\u6709\u7684\u50CF\u7D20\u904D\u5386\u4E00\u8FB9\u90FD\u9700\u8981\u5F88\u957F\u7684\u65F6\u95F4\uFF0C\u9762\u5BF9\u5982\u6B64\u590D\u6742\u7684\u8BA1\u7B97\u91CF\u5C31\u9700\u8981\u5145\u5206\u5229\u7528\u591A\u6838\u7684\u8BA1\u7B97\u7684\u80FD\u529B\u3002\u53C8\u6BD4\u5982\u5F53\u6211\u4EEC\u5728\u7F51\u4E0A\u8D2D\u7269\u65F6\uFF0C\u4E3A\u4E86\u63D0\u5347\u54CD\u5E94\u901F\u5EA6\uFF0C\u9700\u8981\u62C6\u5206\uFF0C\u51CF\u5E93\u5B58\uFF0C\u751F\u6210\u8BA2\u5355\u7B49\u7B49\u8FD9\u4E9B\u64CD\u4F5C\uFF0C\u5C31\u53EF\u4EE5\u8FDB\u884C\u62C6\u5206\u5229\u7528\u591A\u7EBF\u7A0B\u7684\u6280\u672F\u5B8C\u6210\u3002<strong>\u9762\u5BF9\u590D\u6742\u4E1A\u52A1\u6A21\u578B\uFF0C\u5E76\u884C\u7A0B\u5E8F\u4F1A\u6BD4\u4E32\u884C\u7A0B\u5E8F\u66F4\u9002\u5E94\u4E1A\u52A1\u9700\u6C42\uFF0C\u800C\u5E76\u53D1\u7F16\u7A0B\u66F4\u80FD\u543B\u5408\u8FD9\u79CD\u4E1A\u52A1\u62C6\u5206</strong> 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noreferrer"},C=r("Java\u516B\u80A1\u6587"),f=t("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png"},null,-1);function P(U,k){const e=a("ExternalLinkIcon");return p(),s("div",null,[c,t("blockquote",null,[h,t("ul",null,[t("li",null,[t("a",g,[d,o(e)])]),t("li",null,[t("a",u,[_,o(e)])]),t("li",null,[t("a",b,[C,o(e)])])])]),f])}var x=n(i,[["render",P],["__file","why-need-thread.html.vue"]]);export{x as default};
diff --git a/dist/assets/windows-codingmore-run.html.4fb12f5d.js b/dist/assets/windows-codingmore-run.html.225f6c56.js
similarity index 94%
rename from dist/assets/windows-codingmore-run.html.4fb12f5d.js
rename to dist/assets/windows-codingmore-run.html.225f6c56.js
index 82051745..bed0160c 100644
--- a/dist/assets/windows-codingmore-run.html.4fb12f5d.js
+++ b/dist/assets/windows-codingmore-run.html.225f6c56.js
@@ -1,7 +1,7 @@
-import{_ as a}from"./plugin-vue_export-helper.21dcd24c.js";import{r as i,o as c,c as s,a as e,b as r,e as n,d as o}from"./app.a0271b9c.js";const d={},b=n('<h2 id="\u524D\u7F6E\u73AF\u5883\u7684\u51C6\u5907" tabindex="-1"><a class="header-anchor" href="#\u524D\u7F6E\u73AF\u5883\u7684\u51C6\u5907" aria-hidden="true">#</a> \u524D\u7F6E\u73AF\u5883\u7684\u51C6\u5907</h2><ul><li>\u4E00\u53F0\u53EF\u4EE5\u5F00\u673A\u7684\u7535\u8111</li><li>JDK 8</li><li>Maven</li><li>Intellij IDEA\uFF08\u975E\u5FC5\u987B\uFF0C\u53EF\u7528 Eclipse\uFF09</li><li>Visual Studio Code\uFF08\u975E\u5FC5\u987B\uFF0C\u53EF\u7528 hbuilderx\uFF09</li><li>MySQL</li><li>Redis\uFF08\u975E\u5FC5\u987B\uFF0C\u4F1A\u62A5\u9519\uFF0C\u4F46\u4E0D\u5F71\u54CD\u8DD1\uFF09</li><li>OSS\uFF08\u975E\u5FC5\u987B\uFF0C\u4E0A\u4F20\u56FE\u7247\u65F6\u62A5\u9519\uFF0C\u4F46\u4E0D\u5F71\u54CD\u8DD1\uFF09</li></ul><p>\u5BF9\uFF0C\u7F16\u7A0B\u55B5 \u{1F431}\uFF08Spring Boot+Vue \u7684\u524D\u540E\u7AEF\u5206\u79BB\u9879\u76EE\uFF09\u8981\u60F3\u5728\u672C\u5730\u8DD1\u8D77\u6765\uFF0C\u9700\u8981\u8FD9 8 \u4E2A\u524D\u7F6E\u73AF\u5883\u3002</p><p>\u7B2C\u4E00\u4E2A\u6761\u4EF6\uFF0C\u4E00\u53F0\u53EF\u4EE5\u5F00\u673A\u7684\u7535\u8111\uFF0C\u663E\u7136\u6211\u76F8\u4FE1\u5927\u5BB6\u90FD\u662F\u6709\u7684\u3002\u4E0D\u7136\u600E\u4E48\u5B66\u7F16\u7A0B\u662F\u5427\uFF1F\u77A7\u6211\u8FD9\u5E9F\u8BDD\u771F\u591A\u3002</p>',4),p=o("\u8FD9\u7BC7\u5148\u4EE5 Windows \u4E3A\u4F8B\uFF0C"),l={href:"https://tobebetterjavaer.com/springboot/macos-codingmore-run.html",target:"_blank",rel:"noopener noreferrer"},g=o("macOS\u7CFB\u7EDF"),m=o("\u6233\u8FD9\u4E2A\u94FE\u63A5\u3002\u4E0B\u56FE\u662F\u6211\u7684\u5907\u7528\u673A\u5C0F\u7C73\u7B14\u8BB0\u672C\u7684\u914D\u7F6E\u3002"),h=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-de0cd3fc-6120-46b3-bf3d-0d67af8f7065.png",alt:""})],-1),_=o("\u7B2C\u4E8C\u4E2A\u6761\u4EF6\uFF0CJDK 8\uFF0C\u53EF\u4EE5\u901A\u8FC7 "),u={href:"https://tobebetterjavaer.com/gongju/choco.html",target:"_blank",rel:"noopener noreferrer"},v=o("Chocolatey"),f=o("\uFF08Windows \u8F6F\u4EF6\u5305\u7BA1\u7406\u5668\uFF09\u5B89\u88C5\uFF0C\u975E\u5E38\u65B9\u4FBF\uFF08\u524D\u63D0\u6761\u4EF6\u662F\u4F60\u5F97\u79D1\u5B66\u4E0A\u7F51\uFF0C\u5426\u5219\u901F\u5EA6\u4F1A\u975E\u5E38\u6162\uFF0C\u5982\u679C\u4E0D\u80FD\u79D1\u5B66\u4E0A\u7F51\u6211\u4E5F\u4F1A\u63D0\u4F9B\u53E6\u5916\u4E00\u79CD\u5E38\u89C4\u7684\u65B9\u5F0F\uFF09\u3002"),w=n('<p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-c6463fd3-ad81-46e9-9517-95591d506f32.png" alt=""></p><p>\u6267\u884C <code>choco -v</code> \u53EF\u4EE5\u67E5\u770B Chocolatey \u7248\u672C\u3002\u8BB0\u5F97\u4E00\u5B9A\u8981\u4EE5<strong>\u7BA1\u7406\u5458\u8EAB\u4EFD\u8FD0\u884C</strong>\uFF0C\u5426\u5219\u53EF\u4EE5\u62FF\u4E0D\u5230\u5B89\u88C5\u6743\u9650\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-64a79f60-3faa-40d2-82d8-2aa2f3cab465.png" alt=""></p><p>\u6267\u884C <code>choco install jdk8</code> \u53EF\u4EE5\u5B89\u88C5 JDK 8 \u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-32b4a0f0-e5bb-40ff-b38f-c170a74a3f32.png" alt=""></p><p>\u6267\u884C <code>java -version</code> \u53EF\u4EE5\u67E5\u770B\u5F53\u524D JDK \u7248\u672C</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-ec911794-8d5f-41a8-accb-c61852a04960.png" alt=""></p><p>\u4F7F\u7528 Chocolatey \u5B89\u88C5 JDK \u7684\u597D\u5904\u5C31\u662F\u4E0D\u9700\u8981\u518D\u914D\u7F6E\u73AF\u5883\u53D8\u91CF\u3002</p>',8),j=o("\u5982\u679C\u6CA1\u6709\u5B89\u88C5 chocolatey \u7684\u8BDD\uFF08\u6216\u8005\u6CA1\u6709\u5916\u7F51\u6743\u9650\u7684\u8BDD\uFF09\uFF0C\u53EF\u4EE5\u6233 "),y={href:"https://www.oracle.com/java/technologies/javase/javase8-archive-downloads.html",target:"_blank",rel:"noopener noreferrer"},S=o("Downloads - Java SE 8 (oracle.com)"),k=o(" \u4E0B\u8F7D JDK 8\u3002"),x=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-904d9d6f-6451-45e5-a723-f84c5ee53268.png",alt:""})],-1),M=e("p",null,"\u4E4B\u540E\u4E00\u6B65\u6B65\u5B89\u88C5\u5B8C\u6210\u540E\uFF0C\u518D\u914D\u7F6E\u4E00\u4E0B\u73AF\u5883\u53D8\u91CF\u5C31OK\u4E86\u3002",-1),D=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-aa883b95-0be0-4d11-8a16-66fddaf28cce.png",alt:""})],-1),I=e("p",null,[o("\u7B2C\u4E09\u4E2A\u6761\u4EF6\uFF0CMaven\uFF0C\u53EF\u4EE5\u76F4\u63A5\u901A\u8FC7 "),e("code",null,"choco install maven"),o(" \u6765\u5B8C\u6210\u5B89\u88C5\u3002")],-1),q=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-c1e2000e-3312-4ae5-b5dc-a182ed69ff90.png",alt:""})],-1),L=o("\u4E5F\u53EF\u4EE5\u6233 "),C={href:"https://maven.apache.org/download.cgi",target:"_blank",rel:"noopener noreferrer"},K=o("Maven \u2013 Download Apache Maven"),Q=o(" \u4E0B\u8F7D\u514D\u5B89\u88C5\u7248\u3002"),V=n(`<p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-16a4e3ca-ef8b-4261-8082-1804361277c4.png" alt=""></p><p>\u4E4B\u540E\u914D\u7F6E\u5230\u73AF\u5883\u53D8\u91CF\u4E2D\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-fcfcdb9f-bb03-4fa9-a936-0b7c3fad9163.png" alt=""></p><p>\u901A\u8FC7 <code>mvn -v</code> \u6765\u67E5\u770B\u7248\u672C\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-ce54cde6-6e29-4534-bc8b-e98f8f4c5f68.png" alt=""></p><p>\u4E3A\u4E86\u52A0\u5FEB\u9879\u76EE\u4F9D\u8D56\u5305\u7684\u4E0B\u8F7D\u901F\u5EA6\uFF0C\u6211\u4EEC\u9700\u8981\u914D\u7F6E Maven \u7684\u56FD\u5185\u955C\u50CF\u6E90\u3002</p><p>\u627E\u5230 Maven Home\uFF08<code>D:\\download\\apache-maven-3.8.5-bin\\apache-maven-3.8.5</code>\uFF09\uFF0C\u590D\u5236\u4E00\u4EFD settings.xml\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-ef585110-3879-463f-989a-2da6d3b37a85.png" alt=""></p><p>\u5230 <code>C:\\Users\\yours\\.m2</code> \u8DEF\u5F84\u4E0B\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-94b52707-c692-43fc-a97f-04782b4428f4.png" alt=""></p><p>\u6253\u5F00 settings.xml \u6587\u4EF6\u5728 mirrors \u8282\u70B9\u4E0B\u6DFB\u52A0\u963F\u91CC\u4E91\u955C\u50CF\u5730\u5740\uFF0C\u5E76\u4FDD\u5B58\u3002</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;mirror&gt;
+import{_ as a}from"./plugin-vue_export-helper.21dcd24c.js";import{r as i,o as c,c as s,a as e,b as r,e as n,d as o}from"./app.615e41d8.js";const d={},b=n('<h2 id="\u524D\u7F6E\u73AF\u5883\u7684\u51C6\u5907" tabindex="-1"><a class="header-anchor" href="#\u524D\u7F6E\u73AF\u5883\u7684\u51C6\u5907" aria-hidden="true">#</a> \u524D\u7F6E\u73AF\u5883\u7684\u51C6\u5907</h2><ul><li>\u4E00\u53F0\u53EF\u4EE5\u5F00\u673A\u7684\u7535\u8111</li><li>JDK 8</li><li>Maven</li><li>Intellij IDEA\uFF08\u975E\u5FC5\u987B\uFF0C\u53EF\u7528 Eclipse\uFF09</li><li>Visual Studio Code\uFF08\u975E\u5FC5\u987B\uFF0C\u53EF\u7528 hbuilderx\uFF09</li><li>MySQL</li><li>Redis\uFF08\u975E\u5FC5\u987B\uFF0C\u4F1A\u62A5\u9519\uFF0C\u4F46\u4E0D\u5F71\u54CD\u8DD1\uFF09</li><li>OSS\uFF08\u975E\u5FC5\u987B\uFF0C\u4E0A\u4F20\u56FE\u7247\u65F6\u62A5\u9519\uFF0C\u4F46\u4E0D\u5F71\u54CD\u8DD1\uFF09</li></ul><p>\u5BF9\uFF0C\u7F16\u7A0B\u55B5 \u{1F431}\uFF08Spring Boot+Vue \u7684\u524D\u540E\u7AEF\u5206\u79BB\u9879\u76EE\uFF09\u8981\u60F3\u5728\u672C\u5730\u8DD1\u8D77\u6765\uFF0C\u9700\u8981\u8FD9 8 \u4E2A\u524D\u7F6E\u73AF\u5883\u3002</p><p>\u7B2C\u4E00\u4E2A\u6761\u4EF6\uFF0C\u4E00\u53F0\u53EF\u4EE5\u5F00\u673A\u7684\u7535\u8111\uFF0C\u663E\u7136\u6211\u76F8\u4FE1\u5927\u5BB6\u90FD\u662F\u6709\u7684\u3002\u4E0D\u7136\u600E\u4E48\u5B66\u7F16\u7A0B\u662F\u5427\uFF1F\u77A7\u6211\u8FD9\u5E9F\u8BDD\u771F\u591A\u3002</p>',4),p=o("\u8FD9\u7BC7\u5148\u4EE5 Windows \u4E3A\u4F8B\uFF0C"),l={href:"https://tobebetterjavaer.com/springboot/macos-codingmore-run.html",target:"_blank",rel:"noopener noreferrer"},g=o("macOS\u7CFB\u7EDF"),m=o("\u6233\u8FD9\u4E2A\u94FE\u63A5\u3002\u4E0B\u56FE\u662F\u6211\u7684\u5907\u7528\u673A\u5C0F\u7C73\u7B14\u8BB0\u672C\u7684\u914D\u7F6E\u3002"),h=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-de0cd3fc-6120-46b3-bf3d-0d67af8f7065.png",alt:""})],-1),_=o("\u7B2C\u4E8C\u4E2A\u6761\u4EF6\uFF0CJDK 8\uFF0C\u53EF\u4EE5\u901A\u8FC7 "),u={href:"https://tobebetterjavaer.com/gongju/choco.html",target:"_blank",rel:"noopener noreferrer"},v=o("Chocolatey"),f=o("\uFF08Windows \u8F6F\u4EF6\u5305\u7BA1\u7406\u5668\uFF09\u5B89\u88C5\uFF0C\u975E\u5E38\u65B9\u4FBF\uFF08\u524D\u63D0\u6761\u4EF6\u662F\u4F60\u5F97\u79D1\u5B66\u4E0A\u7F51\uFF0C\u5426\u5219\u901F\u5EA6\u4F1A\u975E\u5E38\u6162\uFF0C\u5982\u679C\u4E0D\u80FD\u79D1\u5B66\u4E0A\u7F51\u6211\u4E5F\u4F1A\u63D0\u4F9B\u53E6\u5916\u4E00\u79CD\u5E38\u89C4\u7684\u65B9\u5F0F\uFF09\u3002"),w=n('<p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-c6463fd3-ad81-46e9-9517-95591d506f32.png" alt=""></p><p>\u6267\u884C <code>choco -v</code> \u53EF\u4EE5\u67E5\u770B Chocolatey \u7248\u672C\u3002\u8BB0\u5F97\u4E00\u5B9A\u8981\u4EE5<strong>\u7BA1\u7406\u5458\u8EAB\u4EFD\u8FD0\u884C</strong>\uFF0C\u5426\u5219\u53EF\u4EE5\u62FF\u4E0D\u5230\u5B89\u88C5\u6743\u9650\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-64a79f60-3faa-40d2-82d8-2aa2f3cab465.png" alt=""></p><p>\u6267\u884C <code>choco install jdk8</code> \u53EF\u4EE5\u5B89\u88C5 JDK 8 \u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-32b4a0f0-e5bb-40ff-b38f-c170a74a3f32.png" alt=""></p><p>\u6267\u884C <code>java -version</code> \u53EF\u4EE5\u67E5\u770B\u5F53\u524D JDK \u7248\u672C</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-ec911794-8d5f-41a8-accb-c61852a04960.png" alt=""></p><p>\u4F7F\u7528 Chocolatey \u5B89\u88C5 JDK \u7684\u597D\u5904\u5C31\u662F\u4E0D\u9700\u8981\u518D\u914D\u7F6E\u73AF\u5883\u53D8\u91CF\u3002</p>',8),j=o("\u5982\u679C\u6CA1\u6709\u5B89\u88C5 chocolatey \u7684\u8BDD\uFF08\u6216\u8005\u6CA1\u6709\u5916\u7F51\u6743\u9650\u7684\u8BDD\uFF09\uFF0C\u53EF\u4EE5\u6233 "),y={href:"https://www.oracle.com/java/technologies/javase/javase8-archive-downloads.html",target:"_blank",rel:"noopener noreferrer"},S=o("Downloads - Java SE 8 (oracle.com)"),k=o(" \u4E0B\u8F7D JDK 8\u3002"),x=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-904d9d6f-6451-45e5-a723-f84c5ee53268.png",alt:""})],-1),M=e("p",null,"\u4E4B\u540E\u4E00\u6B65\u6B65\u5B89\u88C5\u5B8C\u6210\u540E\uFF0C\u518D\u914D\u7F6E\u4E00\u4E0B\u73AF\u5883\u53D8\u91CF\u5C31OK\u4E86\u3002",-1),D=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-aa883b95-0be0-4d11-8a16-66fddaf28cce.png",alt:""})],-1),I=e("p",null,[o("\u7B2C\u4E09\u4E2A\u6761\u4EF6\uFF0CMaven\uFF0C\u53EF\u4EE5\u76F4\u63A5\u901A\u8FC7 "),e("code",null,"choco install maven"),o(" \u6765\u5B8C\u6210\u5B89\u88C5\u3002")],-1),q=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-c1e2000e-3312-4ae5-b5dc-a182ed69ff90.png",alt:""})],-1),L=o("\u4E5F\u53EF\u4EE5\u6233 "),C={href:"https://maven.apache.org/download.cgi",target:"_blank",rel:"noopener noreferrer"},K=o("Maven \u2013 Download Apache Maven"),Q=o(" \u4E0B\u8F7D\u514D\u5B89\u88C5\u7248\u3002"),V=n(`<p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-16a4e3ca-ef8b-4261-8082-1804361277c4.png" alt=""></p><p>\u4E4B\u540E\u914D\u7F6E\u5230\u73AF\u5883\u53D8\u91CF\u4E2D\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-fcfcdb9f-bb03-4fa9-a936-0b7c3fad9163.png" alt=""></p><p>\u901A\u8FC7 <code>mvn -v</code> \u6765\u67E5\u770B\u7248\u672C\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-ce54cde6-6e29-4534-bc8b-e98f8f4c5f68.png" alt=""></p><p>\u4E3A\u4E86\u52A0\u5FEB\u9879\u76EE\u4F9D\u8D56\u5305\u7684\u4E0B\u8F7D\u901F\u5EA6\uFF0C\u6211\u4EEC\u9700\u8981\u914D\u7F6E Maven \u7684\u56FD\u5185\u955C\u50CF\u6E90\u3002</p><p>\u627E\u5230 Maven Home\uFF08<code>D:\\download\\apache-maven-3.8.5-bin\\apache-maven-3.8.5</code>\uFF09\uFF0C\u590D\u5236\u4E00\u4EFD settings.xml\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-ef585110-3879-463f-989a-2da6d3b37a85.png" alt=""></p><p>\u5230 <code>C:\\Users\\yours\\.m2</code> \u8DEF\u5F84\u4E0B\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-94b52707-c692-43fc-a97f-04782b4428f4.png" alt=""></p><p>\u6253\u5F00 settings.xml \u6587\u4EF6\u5728 mirrors \u8282\u70B9\u4E0B\u6DFB\u52A0\u963F\u91CC\u4E91\u955C\u50CF\u5730\u5740\uFF0C\u5E76\u4FDD\u5B58\u3002</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;mirror&gt;
   &lt;id&gt;alimaven&lt;/id&gt;
   &lt;name&gt;aliyun maven&lt;/name&gt;
 &lt;url&gt;http://maven.aliyun.com/nexus/content/groups/public/&lt;/url&gt;
   &lt;mirrorOf&gt;central&lt;/mirrorOf&gt;
 &lt;/mirror&gt;
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alt=""></p><p>\u5BFC\u5165\u6210\u529F\u540E\uFF0C\u53EF\u4EE5\u770B\u5230\u76EE\u524D codingmore \u6240\u7528\u5230\u7684 27 \u4E2A\u6570\u636E\u5E93\u6587\u4EF6\uFF0C\u5176\u4E2D qrtz \u5F00\u5934\u7684\u662F\u5B9A\u65F6\u4EFB\u52A1\u7684\u6301\u4E45\u5316\u8868\uFF0C\u5269\u4F59\u662F\u7F16\u7A0B\u55B5\u7684\u6570\u636E\u5E93\u8868\u6587\u4EF6\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-e16bebba-a33e-4a5c-a21a-23b25672397e.png" alt=""></p><p>\u7136\u540E\uFF0C\u4FEE\u6539 <code>codingmore-admin/src/main/resources/application-dev.yml</code> \u6587\u4EF6\u4E2D\u7684 spring.datasource.username\u3001password\u3001url \u7B49\uFF0C\u8BE5\u4E3A\u4F60\u672C\u5730\u7684\u7528\u6237\u540D\u3001\u5BC6\u7801\u548C\u6570\u636E\u5E93\u94FE\u63A5\u5730\u5740\uFF08Web \u7BA1\u7406\u7AEF\uFF09\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-51f61012-ca37-4042-ab74-52c986ba9e79.png" alt=""></p><p>\u4FEE\u6539 <code>codingmore-web/src/main/resources/application-dev.yml</code> \u6587\u4EF6\u4E2D\u7684 spring.datasource.username\u3001password\u3001url \u7B49\uFF0C\u8BE5\u4E3A\u4F60\u672C\u5730\u7684\u7528\u6237\u540D\u3001\u5BC6\u7801\u548C\u6570\u636E\u5E93\u94FE\u63A5\u5730\u5740\uFF08Web \u524D\u7AEF\uFF09\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-0bbf97db-a413-4812-bc75-0246c60dc448.png" alt=""></p><h3 id="_02\u3001redis" tabindex="-1"><a class="header-anchor" href="#_02\u3001redis" aria-hidden="true">#</a> 02\u3001Redis</h3><p>\u5728\u8BA1\u7B97\u673A\u7BA1\u7406\u9762\u677F\u91CC\u542F\u52A8Redis\u670D\u52A1\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-f8573f28-4f60-486b-9266-11d1c18a6f0c.png" alt=""></p><p>\u7136\u540E\uFF0C\u4FEE\u6539 <code>codingmore-admin/src/main/resources/application-dev.yml</code> \u6587\u4EF6\u4E2D\u7684 spring.redis.host\u3001database\u3001port\u3001password\u3001timeout \u7B49\uFF0C\u8BE5\u4E3A\u4F60\u672C\u5730\u7684 Redis \u94FE\u63A5\u4FE1\u606F\uFF0C\u4E00\u822C\u9ED8\u8BA4\u5C31\u597D\uFF08Web \u7BA1\u7406\u7AEF\uFF09\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-c6ea7923-9f6a-49a8-88bc-3d32d84386ab.png" alt=""></p><p>\u4FEE\u6539 <code>codingmore-web/src/main/resources/application-dev.yml</code> \u6587\u4EF6\u4E2D\u7684 spring.redis.host\u3001database\u3001port\u3001password\u3001timeout \u7B49\uFF0C\u8BE5\u4E3A\u4F60\u672C\u5730\u7684 Redis \u94FE\u63A5\u4FE1\u606F\uFF0C\u4E00\u822C\u9ED8\u8BA4\u5C31\u597D\uFF08Web \u524D\u7AEF\uFF09\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-e12a52ca-f961-401a-9429-1c7b63987c53.png" alt=""></p><h3 id="_04\u3001oss" tabindex="-1"><a class="header-anchor" href="#_04\u3001oss" aria-hidden="true">#</a> 04\u3001OSS</h3>',25),Ne=o("\u975E"),Ge={href:"https://tobebetterjavaer.com/zhishixingqiu/",target:"_blank",rel:"noopener noreferrer"},Te=o("\u661F\u7403\u7528\u6237"),Ue=o("\u9700\u8981\u81EA\u5DF1\u8D2D\u4E70\u963F\u91CC\u4E91\u7684 OSS \u670D\u52A1\u548C CDN \u670D\u52A1\u3002"),Pe={href:"https://tobebetterjavaer.com/zhishixingqiu/",target:"_blank",rel:"noopener noreferrer"},Fe=o("\u661F\u7403\u7528\u6237"),Xe=o("\u53EF\u4EE5\u76F4\u63A5\u79C1\u4FE1\u6211\u83B7\u53D6 accessKeyId \u548C accessKeySecret\u3002"),Ye=n('<p>\u7136\u540E\u4FEE\u6539 <code>codingmore-admin/src/main/resources/application-dev.yml</code> \u6587\u4EF6\u4E2D\u7684 aliyun.cdn\u3001oss \u7B49\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-9d511d46-5865-43b4-8d54-02217b534d98.png" alt=""></p><h3 id="_05\u3001codingmore-admin" tabindex="-1"><a class="header-anchor" href="#_05\u3001codingmore-admin" aria-hidden="true">#</a> 05\u3001codingmore-admin</h3><p>\u5728 Intellij IDEA \u4E2D\u8FD0\u884C CodingmoreAdminBootstrap \u4E3B\u7C7B\uFF0C\u542F\u52A8\u7BA1\u7406\u7AEF\u540E\u53F0\u670D\u52A1\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-0fcdf421-9e30-4b1d-8da0-23e33db21070.png" alt=""></p><p>\u5982\u679C\u7F16\u8BD1\u5931\u8D25\uFF0C\u6CE8\u610F\u8C03\u6574 JDK \u7248\u672C\u4E3A Java 8\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-eb63259f-80ae-4f33-b3fb-e634c05b8835.png" alt=""></p><h3 id="_06\u3001codingmore-web" tabindex="-1"><a class="header-anchor" href="#_06\u3001codingmore-web" aria-hidden="true">#</a> 06\u3001codingmore-web</h3><p>\u5728 Intellij IDEA \u4E2D\u8FD0\u884C CodingmoreAdminBootstrap \u4E3B\u7C7B\uFF0C\u542F\u52A8\u7BA1\u7406\u7AEF\u540E\u53F0\u670D\u52A1\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-e95c9654-3ed4-4fc1-9847-47ea534cf553.png" alt=""></p><p>\u542F\u52A8\u540E\uFF0C\u53EF\u4EE5\u76F4\u63A5\u5728\u6D4F\u89C8\u5668\u5730\u5740\u680F\u8F93\u5165 <code>http://localhost:8081</code> \u8BBF\u95EE Web \u524D\u7AEF\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-9249fe0d-4529-4825-96ef-7d79e551907e.png" alt=""></p><h3 id="_07\u3001codingmore-admin-web" tabindex="-1"><a class="header-anchor" href="#_07\u3001codingmore-admin-web" aria-hidden="true">#</a> 07\u3001codingmore-admin-web</h3><p>\u5728 vscode \u4E2D\u6253\u5F00\u7EC8\u7AEF\uFF0C\u6267\u884C <code>yarn install</code> \u6DFB\u52A0\u9879\u76EE\u4F9D\u8D56\uFF08yarn \u662F Facebook \u4E3A node.js \u8FD0\u884C\u65F6\u73AF\u5883\u5F00\u53D1\u8F6F\u4EF6\u6253\u5305\u5DE5\u5177\uFF0C\u662F npm \u8F6F\u4EF6\u5305\u7BA1\u7406\u5668\u7684\u66FF\u4EE3\u54C1\uFF09\u3002</p><p>\u5982\u679C\u6CA1\u6709\u5B89\u88C5 yarn \u7684\u8BDD\uFF0C\u4F1A\u51FA\u73B0\u4EE5\u4E0B\u9519\u8BEF\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-8a24c4c1-d5c4-475e-9445-13194a5c7ade.png" alt=""></p><p>\u53EF\u4EE5\u76F4\u63A5\u4EE5\u7BA1\u7406\u5458\u6A21\u5F0F\u6267\u884C <code>choco install yarn</code> \u6765\u5B89\u88C5 yarn \u5305\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-3d7609c2-bcd0-40e0-a0fb-3ebf1e38a8e1.png" alt=""></p>',18),Ze=o("\u5982\u679C\u6CA1\u6709\u5B89\u88C5 chocolatey \u7684\u8BDD\uFF0C\u9700\u8981\u6233 "),$e={href:"https://nodejs.org/en/download/",target:"_blank",rel:"noopener noreferrer"},eo=o("Download | Node.js (nodejs.org)"),oo=o(" \u5148\u5B89\u88C5node.js\uFF1A"),to=n('<p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-076618e3-6632-44f4-ba9c-88c400c8cdc1.png" alt=""></p><p>\u5F3A\u70C8\u63A8\u8350\u5927\u5BB6\u5B89\u88C5 chocolatey\uFF0C\u5B89\u88C5 node.js \u7684\u65F6\u5019\u4E5F\u4F1A\u51FA\u73B0 chocolatey\u7684\u5F71\u5B50\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-2660c700-f4de-46b8-86bd-b12b6e5a81eb.png" alt=""></p><p>\u518D\u6267\u884C <code>npm install -g yarn</code> \u6765\u5B89\u88C5 yarn\u3002\u5B89\u88C5\u6210\u529F\u540E\uFF0C\u91CD\u65B0\u6253\u5F00 vscode\uFF0C\u6267\u884C <code>yarn -v</code> \u5C31\u53EF\u4EE5\u67E5\u770B yarn \u7684\u7248\u672C\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-78a73357-72f9-4d25-88d2-0e723547514f.png" alt=""></p><p>\u518D\u6B21\u6267\u884C <code>yarn install</code> \u5B89\u88C5\u524D\u7AEF\u73AF\u5883\u3002\u4E4B\u540E\u6267\u884C <code>yarn run dev</code> \u7F16\u8BD1 admin \u524D\u7AEF\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-39e0219b-273f-4a5d-89d1-4dc74d606cd7.png" alt=""></p><p>\u5728\u6D4F\u89C8\u5668\u5730\u5740\u680F\u8F93\u5165 <code>http://localhost:8080</code> \u5C31\u53EF\u4EE5\u8BBF\u95EE\u5230\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-331f1cc4-f52a-4bcd-8e7b-692a7b822e9a.png" alt=""></p><p>\u53EF\u4EE5\u70B9\u51FB\u300C\u83B7\u53D6\u4F53\u9A8C\u8D26\u53F7\u300D\u7684\u65B9\u5F0F\u83B7\u53D6\u767B\u5F55\u7528\u6237\u540D\u548C\u5BC6\u7801\u3002\u5F53\u7136\u4E86\uFF0C\u4F60\u4E5F\u53EF\u4EE5\u76F4\u63A5\u5728 users \u8868\u4E0A\u66B4\u529B\u7834\u89E3\u5BC6\u7801\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-fd88b4eb-ed76-4e23-83eb-c5e830d354eb.png" alt=""></p>',11),ro={href:"https://tobebetterjavaer.com/zhishixingqiu/",target:"_blank",rel:"noopener noreferrer"},no=o("\u661F\u7403\u7528\u6237"),ao=o("\u53EF\u4EE5\u76F4\u63A5\u79C1\u4FE1\u6211\u83B7\u53D6\u8D85\u7EA7\u7BA1\u7406\u5458\u7684\u5BC6\u7801\u3002\u767B\u5F55\u540E\u5C31\u53EF\u4EE5\u770B\u5230\u6587\u7AE0\u5217\u8868\u5566\u3002"),io=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-91ce8f87-dd9a-458a-b6c4-02880c34b7c7.png",alt:""})],-1),co=e("p",null,"\u8FD9\u662F\u6587\u7AE0\u7F16\u8F91\u9875\uFF0C\u662F\u4E0D\u662F\u975E\u5E38\u6E05\u723D\uFF1F",-1),so=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-4094a45f-7aa9-4b9a-a39e-29a8a17d95ba.png",alt:""})],-1),bo=o("\u597D\u4E86\uFF0C"),po={href:"https://tobebetterjavaer.com/springboot/macos-codingmore-run.html",target:"_blank",rel:"noopener noreferrer"},lo=o("MacOS \u7248"),go=o("\u548CWindows\u7248\u5982\u4F55\u4E0B\u8F7D\u7F16\u7A0B\u55B5\u6E90\u7801\uFF0C\u5982\u4F55\u5728\u672C\u5730\u8DD1\u8D77\u6765\u7684\u6574\u4E2A\u6F14\u793A\u8FC7\u7A0B\u5C31\u544A\u4E00\u6BB5\u843D\u8FA3\uFF0C\u6211\u4EEC\u56DE\u5934\u89C1\uFF01");function mo(ho,_o){const t=i("ExternalLinkIcon");return c(),s("div",null,[b,e("p",null,[p,e("a",l,[g,r(t)]),m]),h,e("p",null,[_,e("a",u,[v,r(t)]),f]),w,e("p",null,[j,e("a",y,[S,r(t)]),k]),x,M,D,I,q,e("p",null,[L,e("a",C,[K,r(t)]),Q]),V,e("blockquote",null,[e("p",null,[e("a",B,[E,r(t)])])]),J,R,e("blockquote",null,[e("p",null,[e("a",A,[O,r(t)])])]),W,z,H,e("p",null,[N,e("a",G,[T,r(t)]),U]),P,F,X,Y,e("p",null,[Z,e("a",$,[ee,r(t)]),oe]),te,re,ne,ae,ie,e("p",null,[ce,e("a",se,[de,r(t)]),be]),pe,e("p",null,[le,e("a",ge,[me,r(t)]),he]),_e,ue,e("blockquote",null,[e("ul",null,[e("li",null,[ve,e("a",fe,[we,r(t)])]),e("li",null,[je,e("a",ye,[Se,r(t)])]),e("li",null,[ke,e("a",xe,[Me,r(t)])])])]),De,e("p",null,[Ie,qe,e("a",Le,[Ce,r(t)]),Ke]),Qe,Ve,Be,Ee,Je,Re,e("p",null,[Ae,e("a",Oe,[We,r(t)]),ze]),He,e("p",null,[Ne,e("a",Ge,[Te,r(t)]),Ue,e("a",Pe,[Fe,r(t)]),Xe]),Ye,e("p",null,[Ze,e("a",$e,[eo,r(t)]),oo]),to,e("p",null,[e("a",ro,[no,r(t)]),ao]),io,co,so,e("p",null,[bo,e("a",po,[lo,r(t)]),go])])}var fo=a(d,[["render",mo],["__file","windows-codingmore-run.html.vue"]]);export{fo as default};
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>\u7B2C\u56DB\u4E2A\u6761\u4EF6\uFF0CIntellij IDEA\uFF0CJava \u540E\u7AEF\u5F00\u53D1\u5FC5\u5907\u795E\u5668\uFF0C\u53EF\u4EE5\u5B89\u88C5\u793E\u533A\u7248\uFF0C\u4E5F\u53EF\u4EE5\u5B89\u88C5\u65D7\u8230\u7248\u3002</p>`,13),B={href:"https://www.jetbrains.com/zh-cn/idea/download/#section=mac",target:"_blank",rel:"noopener noreferrer"},E=o("https://www.jetbrains.com/zh-cn/idea/download/#section=mac"),J=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-91ef4d6f-2274-4276-85ea-467e163d9632.png",alt:""})],-1),R=e("p",null,"\u7B2C\u4E94\u4E2A\u6761\u4EF6\uFF0CVisual Studio Code\uFF0C\u5728\u7F16\u5199\u524D\u7AEF\u4EE3\u7801\uFF08vue\u3001JavaScript\u3001css 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src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-5532c69b-d3f5-4661-941e-4aa6586465f6.png" alt=""></p><p>\u5982\u679C\u4E0B\u8F7D\u7684\u662F\u7EFF\u8272\u7248\u514D\u5B89\u88C5\u7248\uFF0C\u53EA\u9700\u8981\u628A zip \u5305\u89E3\u538B\u5C31\u53EF\u4EE5\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-56d7f66e-bcf2-4f2a-aaf7-45753560ccf9.png" alt=""></p><p>\u5728\u89E3\u538B\u76EE\u5F55\u4E0B\uFF0C\u4F60\u4F1A\u53D1\u73B0\u4E00\u4EFD\u53EB Windows Service Documentation.docx \u7684\u6587\u4EF6\uFF0C\u91CC\u9762\u8BE6\u7EC6\u5730\u8BF4\u660E\u4E86 Redis \u670D\u52A1\u7684\u6CE8\u518C/\u5378\u8F7D\u65B9\u5F0F\uFF0C\u4EE5\u53CA\u542F\u52A8/\u505C\u6B62\u65B9\u5F0F\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-b87239ff-626a-476a-bf5b-fb88a43c82ea.png" alt=""></p><p>\u590D\u5236\u5BF9\u5E94\u547D\u4EE4\u5728 CMD 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\u6846\u67B6</li><li>MyBatis-Plus MyBatis \u589E\u5F3A\u5DE5\u5177</li><li>Nginx \u9759\u6001\u8D44\u6E90\u670D\u52A1\u5668</li><li>Druid \u6570\u636E\u5E93\u8FDE\u63A5\u6C60</li><li>OSS \u5BF9\u8C61\u5B58\u50A8</li><li>Redis \u7F13\u5B58\u4E2D\u95F4\u4EF6</li><li>MySQL \u5173\u7CFB\u578B\u6570\u636E\u5E93</li><li>Swagger-UI \u6587\u6863\u751F\u6210\u5DE5\u5177</li><li>Knife4j Swagger \u7F8E\u5316\u589E\u5F3A\u5DE5\u5177</li><li>Hibernator-Validator \u9A8C\u8BC1\u6846\u67B6</li><li>Logback \u65E5\u5FD7\u6846\u67B6</li><li>Lombok \u7B80\u5316\u5BF9\u8C61\u5C01\u88C5\u5DE5\u5177</li><li>Hutool Java \u5DE5\u5177\u7C7B\u5E93</li></ul><p>\u524D\u7AEF\u7528\u5230\u7684\u6280\u672F\u5305\u62EC\uFF1A</p><ul><li>Vue \u524D\u7AEF\u6846\u67B6</li><li>Vue-router \u8DEF\u7531\u6846\u67B6</li><li>Vuex \u5168\u5C40\u72B6\u6001\u7BA1\u7406\u6846\u67B6</li><li>Element \u524D\u7AEF UI \u6846\u67B6</li><li>Axios \u524D\u7AEF HTTP \u6846\u67B6</li><li>Js-cookie cookie 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Navicat\uFF0C\u8FD9\u662F\u4E00\u4E2A\u56FE\u5F62\u5316\u754C\u9762\u7684\u6570\u636E\u5E93\u7BA1\u7406\u5DE5\u5177\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-6ec673cd-6fa8-42e5-b8a0-1c1db8d4d910.png" alt=""></p><p>\u5B89\u88C5\u5B8C\u6BD5\u540E\uFF0C\u8F93\u5165 MySQL \u6570\u636E\u5E93\u7684\u7528\u6237\u540D\u548C\u5BC6\u7801\uFF0C\u5EFA\u7ACB\u672C\u5730\u8FDE\u63A5\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-da4607d1-2cc9-4a31-8229-aec365c82b5e.png" alt=""></p><p>\u7B2C\u4E8C\u6B65\uFF0C\u6253\u5F00\u94FE\u63A5\uFF0C\u65B0\u5EFA\u6570\u636E\u5E93 codingmore\uFF0C\u5BFC\u5165\u7F16\u7A0B\u55B5\u7684 DB \u6587\u4EF6\u3002DB \u6587\u4EF6\u653E\u5728 coding-more/doc \u76EE\u5F55\u4E0B\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-c4af52b2-593a-470e-8e68-1024462bd5db.png" alt=""></p><p>\u5BFC\u5165\u6210\u529F\u540E\uFF0C\u53EF\u4EE5\u770B\u5230\u76EE\u524D codingmore \u6240\u7528\u5230\u7684 27 \u4E2A\u6570\u636E\u5E93\u6587\u4EF6\uFF0C\u5176\u4E2D qrtz \u5F00\u5934\u7684\u662F\u5B9A\u65F6\u4EFB\u52A1\u7684\u6301\u4E45\u5316\u8868\uFF0C\u5269\u4F59\u662F\u7F16\u7A0B\u55B5\u7684\u6570\u636E\u5E93\u8868\u6587\u4EF6\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-e16bebba-a33e-4a5c-a21a-23b25672397e.png" alt=""></p><p>\u7136\u540E\uFF0C\u4FEE\u6539 <code>codingmore-admin/src/main/resources/application-dev.yml</code> \u6587\u4EF6\u4E2D\u7684 spring.datasource.username\u3001password\u3001url \u7B49\uFF0C\u8BE5\u4E3A\u4F60\u672C\u5730\u7684\u7528\u6237\u540D\u3001\u5BC6\u7801\u548C\u6570\u636E\u5E93\u94FE\u63A5\u5730\u5740\uFF08Web \u7BA1\u7406\u7AEF\uFF09\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-51f61012-ca37-4042-ab74-52c986ba9e79.png" alt=""></p><p>\u4FEE\u6539 <code>codingmore-web/src/main/resources/application-dev.yml</code> \u6587\u4EF6\u4E2D\u7684 spring.datasource.username\u3001password\u3001url \u7B49\uFF0C\u8BE5\u4E3A\u4F60\u672C\u5730\u7684\u7528\u6237\u540D\u3001\u5BC6\u7801\u548C\u6570\u636E\u5E93\u94FE\u63A5\u5730\u5740\uFF08Web \u524D\u7AEF\uFF09\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-0bbf97db-a413-4812-bc75-0246c60dc448.png" alt=""></p><h3 id="_02\u3001redis" tabindex="-1"><a class="header-anchor" href="#_02\u3001redis" aria-hidden="true">#</a> 02\u3001Redis</h3><p>\u5728\u8BA1\u7B97\u673A\u7BA1\u7406\u9762\u677F\u91CC\u542F\u52A8Redis\u670D\u52A1\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-f8573f28-4f60-486b-9266-11d1c18a6f0c.png" alt=""></p><p>\u7136\u540E\uFF0C\u4FEE\u6539 <code>codingmore-admin/src/main/resources/application-dev.yml</code> \u6587\u4EF6\u4E2D\u7684 spring.redis.host\u3001database\u3001port\u3001password\u3001timeout \u7B49\uFF0C\u8BE5\u4E3A\u4F60\u672C\u5730\u7684 Redis \u94FE\u63A5\u4FE1\u606F\uFF0C\u4E00\u822C\u9ED8\u8BA4\u5C31\u597D\uFF08Web \u7BA1\u7406\u7AEF\uFF09\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-c6ea7923-9f6a-49a8-88bc-3d32d84386ab.png" alt=""></p><p>\u4FEE\u6539 <code>codingmore-web/src/main/resources/application-dev.yml</code> \u6587\u4EF6\u4E2D\u7684 spring.redis.host\u3001database\u3001port\u3001password\u3001timeout \u7B49\uFF0C\u8BE5\u4E3A\u4F60\u672C\u5730\u7684 Redis \u94FE\u63A5\u4FE1\u606F\uFF0C\u4E00\u822C\u9ED8\u8BA4\u5C31\u597D\uFF08Web \u524D\u7AEF\uFF09\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-e12a52ca-f961-401a-9429-1c7b63987c53.png" alt=""></p><h3 id="_04\u3001oss" tabindex="-1"><a class="header-anchor" href="#_04\u3001oss" aria-hidden="true">#</a> 04\u3001OSS</h3>',25),Ne=o("\u975E"),Ge={href:"https://tobebetterjavaer.com/zhishixingqiu/",target:"_blank",rel:"noopener noreferrer"},Te=o("\u661F\u7403\u7528\u6237"),Ue=o("\u9700\u8981\u81EA\u5DF1\u8D2D\u4E70\u963F\u91CC\u4E91\u7684 OSS \u670D\u52A1\u548C CDN \u670D\u52A1\u3002"),Pe={href:"https://tobebetterjavaer.com/zhishixingqiu/",target:"_blank",rel:"noopener noreferrer"},Fe=o("\u661F\u7403\u7528\u6237"),Xe=o("\u53EF\u4EE5\u76F4\u63A5\u79C1\u4FE1\u6211\u83B7\u53D6 accessKeyId \u548C accessKeySecret\u3002"),Ye=n('<p>\u7136\u540E\u4FEE\u6539 <code>codingmore-admin/src/main/resources/application-dev.yml</code> \u6587\u4EF6\u4E2D\u7684 aliyun.cdn\u3001oss \u7B49\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-9d511d46-5865-43b4-8d54-02217b534d98.png" alt=""></p><h3 id="_05\u3001codingmore-admin" tabindex="-1"><a class="header-anchor" href="#_05\u3001codingmore-admin" aria-hidden="true">#</a> 05\u3001codingmore-admin</h3><p>\u5728 Intellij IDEA \u4E2D\u8FD0\u884C CodingmoreAdminBootstrap \u4E3B\u7C7B\uFF0C\u542F\u52A8\u7BA1\u7406\u7AEF\u540E\u53F0\u670D\u52A1\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-0fcdf421-9e30-4b1d-8da0-23e33db21070.png" alt=""></p><p>\u5982\u679C\u7F16\u8BD1\u5931\u8D25\uFF0C\u6CE8\u610F\u8C03\u6574 JDK \u7248\u672C\u4E3A Java 8\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-eb63259f-80ae-4f33-b3fb-e634c05b8835.png" alt=""></p><h3 id="_06\u3001codingmore-web" tabindex="-1"><a class="header-anchor" href="#_06\u3001codingmore-web" aria-hidden="true">#</a> 06\u3001codingmore-web</h3><p>\u5728 Intellij IDEA \u4E2D\u8FD0\u884C CodingmoreAdminBootstrap \u4E3B\u7C7B\uFF0C\u542F\u52A8\u7BA1\u7406\u7AEF\u540E\u53F0\u670D\u52A1\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-e95c9654-3ed4-4fc1-9847-47ea534cf553.png" alt=""></p><p>\u542F\u52A8\u540E\uFF0C\u53EF\u4EE5\u76F4\u63A5\u5728\u6D4F\u89C8\u5668\u5730\u5740\u680F\u8F93\u5165 <code>http://localhost:8081</code> \u8BBF\u95EE Web \u524D\u7AEF\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-9249fe0d-4529-4825-96ef-7d79e551907e.png" alt=""></p><h3 id="_07\u3001codingmore-admin-web" tabindex="-1"><a class="header-anchor" href="#_07\u3001codingmore-admin-web" aria-hidden="true">#</a> 07\u3001codingmore-admin-web</h3><p>\u5728 vscode \u4E2D\u6253\u5F00\u7EC8\u7AEF\uFF0C\u6267\u884C <code>yarn install</code> \u6DFB\u52A0\u9879\u76EE\u4F9D\u8D56\uFF08yarn \u662F Facebook \u4E3A node.js \u8FD0\u884C\u65F6\u73AF\u5883\u5F00\u53D1\u8F6F\u4EF6\u6253\u5305\u5DE5\u5177\uFF0C\u662F npm \u8F6F\u4EF6\u5305\u7BA1\u7406\u5668\u7684\u66FF\u4EE3\u54C1\uFF09\u3002</p><p>\u5982\u679C\u6CA1\u6709\u5B89\u88C5 yarn \u7684\u8BDD\uFF0C\u4F1A\u51FA\u73B0\u4EE5\u4E0B\u9519\u8BEF\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-8a24c4c1-d5c4-475e-9445-13194a5c7ade.png" alt=""></p><p>\u53EF\u4EE5\u76F4\u63A5\u4EE5\u7BA1\u7406\u5458\u6A21\u5F0F\u6267\u884C <code>choco install yarn</code> \u6765\u5B89\u88C5 yarn \u5305\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-3d7609c2-bcd0-40e0-a0fb-3ebf1e38a8e1.png" alt=""></p>',18),Ze=o("\u5982\u679C\u6CA1\u6709\u5B89\u88C5 chocolatey \u7684\u8BDD\uFF0C\u9700\u8981\u6233 "),$e={href:"https://nodejs.org/en/download/",target:"_blank",rel:"noopener noreferrer"},eo=o("Download | Node.js (nodejs.org)"),oo=o(" \u5148\u5B89\u88C5node.js\uFF1A"),to=n('<p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-076618e3-6632-44f4-ba9c-88c400c8cdc1.png" alt=""></p><p>\u5F3A\u70C8\u63A8\u8350\u5927\u5BB6\u5B89\u88C5 chocolatey\uFF0C\u5B89\u88C5 node.js \u7684\u65F6\u5019\u4E5F\u4F1A\u51FA\u73B0 chocolatey\u7684\u5F71\u5B50\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-2660c700-f4de-46b8-86bd-b12b6e5a81eb.png" alt=""></p><p>\u518D\u6267\u884C <code>npm install -g yarn</code> \u6765\u5B89\u88C5 yarn\u3002\u5B89\u88C5\u6210\u529F\u540E\uFF0C\u91CD\u65B0\u6253\u5F00 vscode\uFF0C\u6267\u884C <code>yarn -v</code> \u5C31\u53EF\u4EE5\u67E5\u770B yarn \u7684\u7248\u672C\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-78a73357-72f9-4d25-88d2-0e723547514f.png" alt=""></p><p>\u518D\u6B21\u6267\u884C <code>yarn install</code> \u5B89\u88C5\u524D\u7AEF\u73AF\u5883\u3002\u4E4B\u540E\u6267\u884C <code>yarn run dev</code> \u7F16\u8BD1 admin \u524D\u7AEF\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-39e0219b-273f-4a5d-89d1-4dc74d606cd7.png" alt=""></p><p>\u5728\u6D4F\u89C8\u5668\u5730\u5740\u680F\u8F93\u5165 <code>http://localhost:8080</code> \u5C31\u53EF\u4EE5\u8BBF\u95EE\u5230\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-331f1cc4-f52a-4bcd-8e7b-692a7b822e9a.png" alt=""></p><p>\u53EF\u4EE5\u70B9\u51FB\u300C\u83B7\u53D6\u4F53\u9A8C\u8D26\u53F7\u300D\u7684\u65B9\u5F0F\u83B7\u53D6\u767B\u5F55\u7528\u6237\u540D\u548C\u5BC6\u7801\u3002\u5F53\u7136\u4E86\uFF0C\u4F60\u4E5F\u53EF\u4EE5\u76F4\u63A5\u5728 users \u8868\u4E0A\u66B4\u529B\u7834\u89E3\u5BC6\u7801\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-fd88b4eb-ed76-4e23-83eb-c5e830d354eb.png" alt=""></p>',11),ro={href:"https://tobebetterjavaer.com/zhishixingqiu/",target:"_blank",rel:"noopener noreferrer"},no=o("\u661F\u7403\u7528\u6237"),ao=o("\u53EF\u4EE5\u76F4\u63A5\u79C1\u4FE1\u6211\u83B7\u53D6\u8D85\u7EA7\u7BA1\u7406\u5458\u7684\u5BC6\u7801\u3002\u767B\u5F55\u540E\u5C31\u53EF\u4EE5\u770B\u5230\u6587\u7AE0\u5217\u8868\u5566\u3002"),io=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-91ce8f87-dd9a-458a-b6c4-02880c34b7c7.png",alt:""})],-1),co=e("p",null,"\u8FD9\u662F\u6587\u7AE0\u7F16\u8F91\u9875\uFF0C\u662F\u4E0D\u662F\u975E\u5E38\u6E05\u723D\uFF1F",-1),so=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-4094a45f-7aa9-4b9a-a39e-29a8a17d95ba.png",alt:""})],-1),bo=o("\u597D\u4E86\uFF0C"),po={href:"https://tobebetterjavaer.com/springboot/macos-codingmore-run.html",target:"_blank",rel:"noopener noreferrer"},lo=o("MacOS \u7248"),go=o("\u548CWindows\u7248\u5982\u4F55\u4E0B\u8F7D\u7F16\u7A0B\u55B5\u6E90\u7801\uFF0C\u5982\u4F55\u5728\u672C\u5730\u8DD1\u8D77\u6765\u7684\u6574\u4E2A\u6F14\u793A\u8FC7\u7A0B\u5C31\u544A\u4E00\u6BB5\u843D\u8FA3\uFF0C\u6211\u4EEC\u56DE\u5934\u89C1\uFF01"),mo=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png",alt:""})],-1);function ho(_o,uo){const t=i("ExternalLinkIcon");return c(),s("div",null,[b,e("p",null,[p,e("a",l,[g,r(t)]),m]),h,e("p",null,[_,e("a",u,[v,r(t)]),f]),w,e("p",null,[j,e("a",y,[S,r(t)]),k]),x,M,D,I,q,e("p",null,[L,e("a",C,[K,r(t)]),Q]),V,e("blockquote",null,[e("p",null,[e("a",B,[E,r(t)])])]),J,R,e("blockquote",null,[e("p",null,[e("a",A,[O,r(t)])])]),z,W,H,e("p",null,[N,e("a",G,[T,r(t)]),U]),P,F,X,Y,e("p",null,[Z,e("a",$,[ee,r(t)]),oe]),te,re,ne,ae,ie,e("p",null,[ce,e("a",se,[de,r(t)]),be]),pe,e("p",null,[le,e("a",ge,[me,r(t)]),he]),_e,ue,e("blockquote",null,[e("ul",null,[e("li",null,[ve,e("a",fe,[we,r(t)])]),e("li",null,[je,e("a",ye,[Se,r(t)])]),e("li",null,[ke,e("a",xe,[Me,r(t)])])])]),De,e("p",null,[Ie,qe,e("a",Le,[Ce,r(t)]),Ke]),Qe,Ve,Be,Ee,Je,Re,e("p",null,[Ae,e("a",Oe,[ze,r(t)]),We]),He,e("p",null,[Ne,e("a",Ge,[Te,r(t)]),Ue,e("a",Pe,[Fe,r(t)]),Xe]),Ye,e("p",null,[Ze,e("a",$e,[eo,r(t)]),oo]),to,e("p",null,[e("a",ro,[no,r(t)]),ao]),io,co,so,e("p",null,[bo,e("a",po,[lo,r(t)]),go]),mo])}var wo=a(d,[["render",ho],["__file","windows-codingmore-run.html.vue"]]);export{wo as default};
diff --git a/dist/assets/windows-codingmore-run.html.dcfb09e6.js b/dist/assets/windows-codingmore-run.html.6d49b8aa.js
similarity index 87%
rename from dist/assets/windows-codingmore-run.html.dcfb09e6.js
rename to dist/assets/windows-codingmore-run.html.6d49b8aa.js
index 11d8989f..53570a8b 100644
--- a/dist/assets/windows-codingmore-run.html.dcfb09e6.js
+++ b/dist/assets/windows-codingmore-run.html.6d49b8aa.js
@@ -1 +1 @@
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diff --git a/dist/assets/xian.html.4603b6ae.js b/dist/assets/xian.html.4603b6ae.js
deleted file mode 100644
index 069879e8..00000000
--- a/dist/assets/xian.html.4603b6ae.js
+++ /dev/null
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id="\u4E92\u8054\u7F51" tabindex="-1"><a class="header-anchor" href="#\u4E92\u8054\u7F51" aria-hidden="true">#</a> \u4E92\u8054\u7F51</h3><p><strong>\u534E\u4E3A</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-4e82d879-bbe0-4bc5-a088-fadc84483d65.png" alt=""></p><p>\u5982\u679C\u60F3\u5728\u897F\u5B89\u5FEB\u901F\u6323\u94B1\u7684\u8BDD\uFF0C\u534E\u4E3A\u51E0\u4E4E\u662F\u6700\u597D\u7684\u9009\u62E9\u4E86\uFF0C\u6309\u7167\u534E\u4E3A\u7684\u5DE5\u8D44\u6C34\u5E73\u5728\u897F\u5B89\u4E70\u623F\u6839\u672C\u6CA1\u6709\u538B\u529B\u3002\u534E\u4E3A\u5728\u897F\u5B89\u7684\u5EFA\u5236\u5F88\u9F50\u5168\uFF0C\u6D88\u8D39\u8005\u3001CloudBu\u3001\u4E91\u6838\u5FC3\u7B49\u4E8B\u4E1A\u7FA4\u4EE5\u53CA<code>\u534E\u4E3A\u6D77\u601D</code>\uFF0C2012 \u5B9E\u9A8C\u5BA4\u90FD\u6709\u3002\u4F46\u662F\u56E0\u4E3A\u53BB\u5E74\u7F8E\u56FD\u5BF9\u534E\u4E3A\u7684\u6253\u538B\uFF0C\u6D88\u8D39\u8005\u3001\u534E\u4E3A\u6D77\u601D\u4EE5\u53CA 2012 \u5B9E\u9A8C\u5BA4\u8FD9\u4E9B\u4E4B\u524D\u5F88\u9999\u7684\u4E8B\u4E1A\u7FA4\u76EE\u524D\u65E5\u5B50\u90FD\u4E0D\u592A\u597D\u8FC7\u3002</p><p>\u897F\u5B89\u534E\u4E3A\u6821\u62DB\u6839\u636E\u9762\u8BD5\u8BC4\u5206\u7ED9\u5E94\u5C4A\u751F\u8FDB\u884C\u8BC4\u7EA7\uFF0C\u672C\u79D1\u751F\u548C\u7855\u58EB\u751F\u7684\u8BC4\u7EA7\u5728 13 \u7EA7 \u548C 15 \u7EA7 \u4E4B\u95F4\uFF0C\u6BCF\u4E00\u7EA7\u53C8\u5206\u4E3A A\u3001B\u3001C \u4E09\u4E2A\u6863\u3002\u6839\u636E\u8BC4\u7EA7\u8FDB\u884C\u5DE5\u8D44\u7684\u8BC4\u5B9A\uFF0C13 \u7EA7 \u548C 14 \u7EA7 \u7684\u7A0E\u524D\u5DE5\u8D44\u5728\u6BCF\u6708 13-19k \u4E4B\u95F4\uFF0C\u6BCF\u5E74 14 \u85AA\u300215 \u7EA7 \u9700\u8981\u7279\u522B\u4F18\u79C0\u7684\u7855\u58EB\u624D\u80FD\u62FF\u5230\uFF0C\u5DE5\u8D44\u5E74\u5305\u57FA\u672C\u5728\u7A0E\u524D 30 \u4E07 - 40 \u4E07\u4E4B\u95F4\u3002\u534E\u4E3A\u5728\u897F\u5B89\u7684\u6821\u62DB\u85AA\u8D44\u6C34\u5E73\u8FD8\u662F\u5F88\u9AD8\u7684\uFF0C\u51E0\u4E4E\u548C\u5317\u4EAC\u6301\u5E73\u4E86\u3002</p><p>\u534E\u4E3A\u5728\u897F\u5B89\u7684\u793E\u62DB\u6211\u4E0D\u662F\u7279\u522B\u6E05\u695A\uFF0C\u53EA\u662F\u77E5\u9053\u534E\u4E3A\u793E\u62DB\u5927\u90E8\u5206\u7ED9\u7684\u662F OD \uFF0C\u793E\u62DB\u60F3\u62FF\u6B63\u5F0F offer \u57FA\u672C\u90FD\u9700\u8981 16 \u7EA7\u4EE5\u4E0A\u7684\u8BC4\u7EA7\u3002</p><p>\u5728\u534E\u4E3A\u4E0A\u73ED\u662F\u538B\u529B\u6BD4\u8F83\u5927\uFF0C\u4E5F\u6BD4\u8F83\u7D2F\u7684\u3002\u636E\u6211\u4E86\u89E3\uFF0C\u897F\u5B89\u534E\u4E3A\u7684 CloudBu 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Dispacth\uFF0C\u4E5F\u662F\u4E00\u79CD\u5916\u5305\uFF0C\u548CFESCO\u7B7E\u5408\u540C\uFF0C\u4F46\u76F4\u7CFB\u9886\u5BFC\u90FD\u662F\u534E\u4E3A\u7684\u4EBA\uFF0C\u800C\u4E0D\u662F\u5728\u4E59\u65B9\u516C\u53F8\u7684\u56E2\u961F\u91CC\u7ED9\u7532\u65B9\u534E\u4E3A\u5E72\u6D3B\uFF09\uFF0C\u4E0D\u80FD\u62FF\u80A1\u7968\u3002\u5982\u679C\u4F60\u60F3\u8D5A\u94B1\uFF0C\u53EF\u4EE5\u653E\u5F03\u4E00\u5207\u9876\u4F4F\u538B\u529B\uFF0C\u53BB\u534E\u4E3A\u8FD8\u4E0D\u9519\uFF0C\u4F46\u4E5F\u8981\u6CE8\u610F\u90E8\u95E8\uFF0C\u65E0\u7EBF\u7F51\uFF0C\u6838\u5FC3\u7F51\uFF0C\u8FD8\u6709\u73B0\u5728\u7684\u8F66\u8054\u7F51\u8FD8\u4E0D\u9519\uFF0C\u4F46\u662F\u4E0D\u5EFA\u8BAE\u8003\u8651\u73B0\u5728\u7684\u7EC8\u7AEF\u4E86\u3002</p><p><strong>\u963F\u91CC\u5DF4\u5DF4</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-135b1f20-48ad-4295-bc50-40969ef023b0.png" alt=""></p><p>\u963F\u91CC\u5DF4\u5DF4\u8FD8\u6CA1\u5927\u8303\u56F4\u7684\u5728\u897F\u5B89\u62DB\u4EBA\uFF0C\u60C5\u51B5\u76EE\u524D\u8FD8\u4E0D\u592A\u6E05\u695A\u3002\u6211\u95EE\u8FC7\u963F\u91CC\u5DF4\u5DF4\u7684\u5458\u5DE5\uFF0C\u53EA\u77E5\u9053\u76EE\u524D\u5728\u897F\u5B89\u8BBE\u70B9\u7684\u90E8\u95E8\u662F\u963F\u91CC\u4E91\uFF0C\u9700\u8981\u534A\u5E74\u5728\u676D\u5DDE\u4E0A\u73ED\uFF0C\u534A\u5E74\u5728\u897F\u5B89\u4E0A\u73ED\uFF0C\u5DE5\u8D44\u6C34\u5E73\u548C\u676D\u5DDE\u4E00\u81F4\u3002\u4E0D\u8FC7\u76EE\u524D\u62DB\u7684\u91CF\u6BD4\u8F83\u5C0F\uFF0C\u57FA\u672C\u90FD\u662F\u62DB\u9AD8p\uFF0C\u4E3B\u8981\u662F\u505A\u552E\u524D\u7684\u4E1A\u52A1\u67B6\u6784\u8BBE\u8BA1\uFF0C\u53EA\u6709\u5F88\u5C11\u7684\u6821\u62DB\u540D\u989D\u3002</p><p><strong>\u4EAC\u4E1C</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-c9b0621d-f56c-42a0-a618-f261466f06a4.png" alt=""></p><p>\u4EAC\u4E1C\u628A\u4EAC\u4E1C\u7269\u6D41\u7684\u56E2\u961F\u8BBE\u5728\u4E86\u897F\u5B89\u822A\u5929\u57CE\uFF0C\u76EE\u6D4B\u56E2\u961F\u89C4\u6A21\u5728\u51E0\u767E\u4EBA\uFF0C\u5DE5\u8D44\u6C34\u5E73\u5927\u7EA6\u662F\u4EAC\u4E1C\u5728\u5317\u4EAC\u5DE5\u8D44\u7684 80%\u3002\u5927\u5BB6\u53EF\u4EE5\u53C2\u8003\u4E00\u4E0B\uFF0C\u4EAC\u4E1C\u53BB\u5E74\u5728\u5317\u4EAC\u7684\u90E8\u95E8\uFF0C\u6821\u62DB\u666E\u901A offer \u662F\u5E74\u5305 28 \u4E07\uFF0Csp \u662F\u5E74\u5305 32.9 \u4E07\u3002</p><p>\u4E00\u4F4D\u5728\u897F\u5B89\u4EAC\u4E1C\u7684\u8BFB\u8005\u8865\u5145\uFF1A\u4E0A\u73ED\u65E99\u70B9\u665A7\u70B9\uFF0C\u5468\u516D\u6CA1\u6709\u57F9\u8BAD\u4E0D\u7528\u6765\u3002</p><p><strong>\u817E\u8BAF\u4E91</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-67aa194e-52b0-4acb-b22b-1c1f4c09fac8.png" alt=""></p><p>\u817E\u8BAF\u4E91\u662F\u817E\u8BAF\u7684\u5168\u8D44\u5B50\u516C\u53F8\uFF0C\u76EE\u524D\u5BF9\u8FD9\u91CC\u8912\u8D2C\u4E0D\u4E00\u3002\u6821\u62DB\u85AA\u8D44\u6C34\u5E73\u672C\u79D1\u548C\u7855\u58EB\u751F\u5927\u6982\u662F\u6708\u85AA 13-16k\uFF0C\u6BCF\u5E74 16 \u85AA\uFF0C\u5927\u5BB6\u53EF\u4EE5\u53C2\u8003\u4E00\u4E0B\uFF0C\u817E\u8BAF 21 \u5C4A\u6821\u62DB\u7684\u85AA\u8D44\u662F 17-21.5k \uFF0C\u6BCF\u5E74 18 \u85AA\u3002\u793E\u62DB\u6211\u770B\u4E00\u4E2A\u672C\u79D1\u6BD5\u4E1A\u56DB\u5E74\u7ECF\u9A8C\u7684\u8001\u54E5\u62FF\u5230\u7684\u5E74\u5305\u662F 33 \u4E07\u3002\u817E\u8BAF\u4E91\u7684\u804C\u7EA7\u548C\u817E\u8BAF\u4E0D\u662F\u5BF9\u9F50\u7684\uFF0C\u5E76\u4E14\u4E1A\u52A1\u6BD4\u8F83\u8FB9\u7F18\uFF0C\u8FD9\u4E5F\u662F\u7F51\u4E0A\u88AB\u55B7\u7684\u4E00\u4E2A\u4E3B\u8981\u539F\u56E0\u3002\u76EE\u524D\u897F\u5B89\u817E\u8BAF\u4E91\u521B\u7ACB\u65F6\u95F4\u4E0D\u4E45\uFF0C\u52A0\u73ED\u5F3A\u5EA6\u662F\u6BD4\u8F83\u5927\u7684\u3002</p><p><strong>\u5B57\u8282\u8DF3\u52A8\u3001\u5C0F\u7C73\u3001ViVO\u3001OPPO</strong></p><p>\u5C0F\u7C73\u5DF2\u7ECF\u786E\u5B9A\u5728\u897F\u5B89\u8BBE\u7ACB\u7814\u53D1\u4E2D\u5FC3\u4E86\uFF0C\u4F46\u5177\u4F53\u662F\u54EA\u4E9B\u90E8\u95E8\u8FD8\u4E0D\u592A\u6E05\u695A\u3002\u5B57\u8282\u8DF3\u52A8\u4E4B\u524D\u5728\u897F\u5B89\u7684\u90E8\u95E8\u662F\u5BA1\u6838\u76F8\u5173\u7684\u5C97\u4F4D\uFF0C\u76EE\u524D\u4E5F\u6709\u8F83\u4E3A\u786E\u5B9A\u7684\u6D88\u606F\u4F1A\u5728\u897F\u5B89\u8BBE\u7ACB\u7814\u53D1\u4E2D\u5FC3\uFF0C\u5927\u5BB6\u611F\u5174\u8DA3\u7684\u8BDD\u6301\u7EED\u5173\u6CE8\u3002\u4ECA\u5E74vivo\u5728\u7EBF\u9AD8\u65B0\u73AF\u666E\u4E5F\u8BBE\u7ACB\u7814\u53D1\u90E8\u95E8\u4E86\uFF0C\u542C\u8BF4\u5F85\u9047\u4E0D\u9519\u3002OPPO\u5728\u897F\u5B89\u4E5F\u662F\u521A\u8BBE\u7ACB\u7814\u53D1\u90E8\u95E8\u4E0D\u4E45\uFF0C\u62DB\u4EBA\u6BD4\u8F83\u75AF\u72C2\uFF0C\u542C\u8BF4\u52A0\u73ED\u4E5F\u5F88\u75AF\u72C2\u3002</p><p><strong>\u5E7F\u8054\u8FBE</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-9180be40-265e-42e5-9a85-4d61193b8798.png" alt=""></p><p>\u5E7F\u8054\u8FBE\u897F\u5B89\u7684\u90E8\u95E8\u5728\u9488\u5BF9 21 \u5C4A\u6BD5\u4E1A\u751F\u7684\u6821\u62DB\u4E2D\u5F00\u51FA\u7684\u85AA\u8D44\u662F\u5F88\u6709\u8BDA\u610F\u7684\u3002\u7ED9\u5E94\u5C4A\u7855\u58EB\u7684 sp \u662F 19k x 15\uFF0C\u666E\u901A offer \u662F 17k x 15\uFF0C\u672C\u79D1\u751F\u6BCF\u6708\u57FA\u672C\u90FD\u5728 13-17k \u4E4B\u95F4\u3002\u5E7F\u8054\u8FBE\u5DE5\u4F5C\u5236\u5EA6\u57FA\u672C\u662F 965 \u6216\u8005 975\uFF0C\u6BCF\u4E2A\u6708\u8FD8\u6709\u4E00\u5929\u7684\u5E26\u85AA\u75C5\u5047\u3002\u8FD9\u8FD8\u8981\u5565\u81EA\u884C\u8F66\uFF1F\u4E0D\u8FC7\u5E7F\u8054\u8FBE\u66FE\u7ECF\u4E5F\u6709\u8FC7\u9ED1\u6599\uFF0C\u5927\u5BB6\u81EA\u884C\u4E0A\u7F51\u4E86\u89E3\u3002</p><p><strong>\u6D59\u6C5F\u5927\u534E\u3001\u6D77\u5EB7\u5A01\u89C6</strong></p><p>\u6D77\u5EB7\u5A01\u89C6\u5176\u5B9E\u662F\u56FD\u4F01\uFF0C\u4F46\u662F\u6D77\u5EB7\u5A01\u89C6\u548C\u5927\u534E\u5DE5\u4F5C\u5F3A\u5EA6\u548C\u5F85\u9047\u65B9\u9762\u7279\u522B\u4E00\u81F4\uFF0C\u5C31\u653E\u4E00\u5757\u8BF4\u4E86\u3002\u5927\u534E\u548C\u6D77\u5EB7\u5A01\u89C6\u5728\u897F\u5B89\u90FD\u6709\u8BBE\u7ACB\u7814\u53D1\u57FA\u5730\u7684\uFF0C\u5E76\u4E14\u62DB\u4EBA\u5F88\u591A\u3002\u8FD9\u54E5\u4FE9\u76EE\u524D\u5728\u7F51\u4E0A\u88AB\u55B7\u7684\u6BD4\u8F83\u72E0\uFF0C\u636E\u8BF4\u5DE5\u4F5C\u5F3A\u5EA6\u5F88\u5927\uFF0C\u4F46\u5DE5\u8D44\u6C34\u5E73\u53C8\u5F88\u4F4E\uFF0C\u5E76\u4E14\u6DA8\u85AA\u7F13\u6162\u3002\u5927\u5BB6\u5982\u679C\u60F3\u53BB\u8FDB\u4E00\u6B65\u4E86\u89E3\u53EF\u4EE5\u53BB\u627E\u8FD9\u4E24\u4E2A\u5382\u5B50\u7684\u5458\u5DE5\u54C8\u3002</p><p><strong>360</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-327db5f0-4061-48c3-b672-b1670f98325f.png" alt=""></p><p>360 \u5728\u897F\u5B89\u53EA\u6709\u4E00\u4E2A\u51E0\u5341\u4EBA\u7684\u56E2\u961F\u3002\u6CA1\u542C\u8BF4\u8FC7\u8FD9\u91CC\u6709\u6821\u62DB\uFF0C\u793E\u62DB\u7684\u8BDD 3 \u5E74\u4EE5\u4E0A\u7ECF\u9A8C\u7684\u5DEE\u4E0D\u591A\u80FD\u6BCF\u6708\u7ED9\u5230 20k \u3002\u6709\u8BF4\u5728\u8FD9\u91CC\u5F85\u7684\u8212\u670D\u7684\uFF0C\u4E5F\u6709\u55B7\u7684\u3002</p><p><strong>\u5947\u5B89\u4FE1</strong></p><p>\u5947\u5B89\u4FE1\u5728\u6821\u62DB\u7684\u5DE5\u8D44\u548C\u4E2D\u5174\u5DEE\u4E0D\u591A\uFF0C\u5E74\u85AA 20 \u4E07 \u5DE6\u53F3\uFF0C\u5DE5\u4F5C\u5236\u5EA6\u662F 1085\u3002\u5728\u897F\u5B89\u62DB\u7684\u4EBA\u8FD8\u662F\u633A\u591A\u7684\u3002</p><p><strong>\u79D1\u5927\u8BAF\u98DE</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-3592f841-8390-4399-ae8a-94c4368541ea.png" alt=""></p><p>\u79D1\u5927\u8BAF\u98DE\u897F\u5B89\u4E1D\u8DEF\u603B\u90E8\u4E3B\u8981\u662F\u7B97\u6CD5\u5C97\uFF0C\u4E0D\u8FC7\u6211\u770B\u7F51\u4E0A\u55B7\u7684\u6BD4\u8F83\u591A\u3002\u636E\u8BF4\u662F\u6D3B\u591A\u94B1\u5C11\u3002</p><p><strong>\u5927\u7586</strong></p><p>\u5728\u897F\u5B89\u7684\u5C97\u4F4D\u53EA\u6709\u76F8\u673A\u5D4C\u5165\u5F0F\u548C\u6D4B\u8BD5\u5C97\u4F4D\uFF0C\u5DE5\u8D44\u6BD4\u534E\u4E3A\u8FD8\u8981\u7565\u9AD8\u3002</p><p><strong>OPPO</strong></p><p>21 \u5E74\u5E74\u521D\u521A\u5728\u897F\u5B89\u6210\u7ACB\uFF0C\u6700\u8FD1\u75AF\u72C2\u62DB\u4EBA\u3002\u52A0\u73ED\u4E25\u91CD\u3002</p><p><strong>\u7EFF\u76DF</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-b70c6624-f4f1-453f-9ec8-5db22661bb18.png" alt=""></p><p>\u7EFF\u76DF\u7B97\u662F\u4E2D\u578B\u4F01\u4E1A\u91CC\u6BD4\u8F83\u9999\u7684\uFF0C\u7EFF\u76DF\u5728\u5B89\u5168\u9886\u57DF\u8FD8\u662F\u6BD4\u8F83\u5F3A\u7684\u3002\u5DE5\u8D44\u6BD4\u8F83\u4F4E\uFF0C\u7855\u58EB\u6821\u62DB\u624D\u80FD\u7ED9\u5230 14k x 14\uFF0C\u4F46\u662F\u8FD9\u5BB6\u516C\u53F8\u51E0\u4E4E\u4E0D\u52A0\u73ED\uFF0C\u5458\u5DE5\u7684\u79BB\u804C\u7387\u4E5F\u4E00\u76F4\u5F88\u4F4E\uFF0C\u6211\u540C\u5B66\u6709\u8FDD\u7EA6\u4E2D\u5174\u4E09\u65B9\u53BB\u7EFF\u76DF\u7684\u3002</p><p>\u8BFB\u8005\u8865\u5145\uFF1A\u6700\u8FD1\u5728\u7EFF\u76DF\u79D1\u6280\u5B9E\u4E60\u6D4B\u8BD5\uFF0C\u6DF1\u5207\u4F53\u4F1A\u5230\u517B\u8001\u578B\u516C\u53F8\u3002\u4E0D\u52A0\u73ED\u3002</p><p><strong>\u5F53\u5F53\u7F51</strong></p><p>\u65E9 9 \u665A 8 \u70B9\u534A\uFF0C\u5468\u672B\u53CC\u4F11\u3002\u7EC4\u5185\u6C1B\u56F4\u8FD8\u4E0D\u9519</p><p><strong>\u4EA4\u53C9\u4FE1\u606F\u6838\u5FC3\u6280\u672F\u7814\u7A76\u9662</strong></p><p>\u4E3B\u8981\u505A\u4EBA\u5DE5\u667A\u80FD\u3002\u80CC\u666F\u5F88\u5F3A\u5927\u3002\u5927\u4F6C\u59DA\u671F\u667A\u5E26\u961F\uFF0C\u6709 30 \u4F4D\u6E05\u534E\u4EA4\u53C9\u4FE1\u606F\u7814\u7A76\u9662\u7684\u6559\u6388\u53C2\u4E0E\u8FD0\u8425\u3002\u62DB\u4EBA\u7684\u8981\u6C42\u5F88\u9AD8\u3002</p><p><strong>\u5BD2\u6B66\u7EAA</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-fdf08fc3-d216-4382-913d-5f8b78b8e7df.png" alt=""></p><p>\u5BD2\u6B66\u7EAA\u662F\u505A\u667A\u80FD\u82AF\u7247\u7684\u516C\u53F8\uFF0C\u80CC\u540E\u7AD9\u7740\u4E2D\u79D1\u9662\u8BA1\u7B97\u6240\u30022019 \u5E74\u843D\u6237\u7684\u897F\u54B8\u65B0\u533A\uFF0C\u76F8\u5173\u4FE1\u606F\u6BD4\u8F83\u5C11\u3002\u6211\u77E5\u9053\u7684\u662F\u52A0\u73ED\u6BD4\u8F83\u591A\uFF0C\u4E0D\u8FC7\u85AA\u8D44\u4E5F\u9AD8\u3002</p><p><strong>\u5176\u4ED6</strong></p><p>\u5176\u5B83\u7684\u4E2D\u578B\u79C1\u4F01\u6211\u5C31\u4E0D\u4E00\u4E2A\u4E2A\u70B9\u8BC4\u4E86\uFF0C\u6211\u628A\u5728\u897F\u5B89\u8BBE\u7ACB\u7814\u53D1\u90E8\u95E8\u7684\u516C\u53F8\u540D\u5B57\u5217\u5728\u8FD9\u91CC\uFF0C\u5927\u5BB6\u611F\u5174\u8DA3\u81EA\u5DF1\u53BB\u4E86\u89E3\u3002</p><p>\u8BFA\u74E6\u79D1\u6280\uFF08\u897F\u7535\u7684\u8001\u5E08\u5F00\u7684\uFF09\u3001\u4F18\u4FE1\u4E8C\u624B\u8F66\u3001\u7F8E\u6797\u6570\u636E\u3001\u4EA4\u5927\u6377\u666E\u3001\u4EA4\u5927\u957F\u5929\u3001\u897F\u7535\u6377\u901A\u3001\u8461\u8404\u57CE\u3001\u5168\u65F6\u4E91\u3001\u795E\u7B56\u6570\u636E\u3002</p><h3 id="\u56FD\u4F01" tabindex="-1"><a class="header-anchor" href="#\u56FD\u4F01" aria-hidden="true">#</a> \u56FD\u4F01</h3><p>\u611F\u89C9\u897F\u5B89\u51E0\u5BB6\u56FD\u4F01\u7684\u6027\u4EF7\u6BD4\u7565\u4F4E\uFF0C\u5DE5\u8D44\u4E0D\u9AD8\uFF0C\u4E14\u5927\u90E8\u5206\u52A0\u73ED\u4E25\u91CD\u3002\u6821\u62DB\u5E94\u5C4A\u7855\u58EB\u5DE5\u8D44\u7A0E\u524D\u5E74\u85AA\u57FA\u672C\u90FD\u5728 15w-20w \u4E4B\u95F4\uFF0C\u672C\u79D1\u751F\u7684\u5E74\u85AA\u6BD4\u7855\u58EB\u5C11 3w \u5DE6\u53F3\u3002\u56FD\u4F01\u76F8\u8F83\u4E8E\u79C1\u4F01\u6DA8\u85AA\u4F1A\u6162\u5F88\u591A\uFF0C\u4E0D\u8FC7\u76F8\u5BF9\u7A33\u5B9A\u4E00\u4E9B\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-e12acc1d-4b6d-4f2e-a352-7155b527fa07.png" alt=""></p><p><strong>\u4E2D\u5174</strong></p><p>\u4E2D\u5174\u6821\u62DB\u7684\u84DD\u5251\u8BA1\u5212\u8FD8\u662F\u7ED9\u7684\u633A\u591A\u7684\uFF0C\u53BB\u5E74\u84DD\u5251\u8BA1\u5212\u7ED9\u51FA\u7684\u85AA\u8D44\u5305\u662F 40 \u4E07\u4EE5\u4E0A\uFF0C\u4E0D\u8FC7\u540D\u989D\u5F88\u5C11\uFF0C\u4E00\u4E2A\u5927\u90E8\u95E8\u5C31\u4E00\u4E24\u4E2A\u540D\u989D\u3002\u9664\u84DD\u5251\u8BA1\u5212\u5916\uFF0C\u5176\u5B83\u7B49\u7EA7\u7684 offer \u6708\u85AA\u5728 10-15k \u4E4B\u95F4\uFF0C\u6BCF\u5E74 14 \u85AA\u6216 15 \u85AA\u3002</p><p><strong>\u79FB\u52A8</strong></p><p>\u79FB\u52A8\u897F\u5B89\u7814\u7A76\u9662\u548C\u79FB\u52A8\u96C4\u5B89\u7814\u7A76\u9662\u90FD\u5728\u897F\u5B89\uFF0C\u5BF9\uFF0C\u4F60\u6CA1\u542C\u9519\uFF0C\u96C4\u5B89\u7814\u7A76\u9662\u4E5F\u5728\u897F\u5B89\u8BBE\u70B9\u4E86\u3002\u7855\u58EB\u603B\u5305\u5927\u7EA6 16-19 \u4E07\uFF0C\u79FB\u52A8\u7684\u5DE5\u8D44\u4E00\u90E8\u5206\u4F1A\u5728\u5E74\u5E95\u6309\u5E74\u7EC8\u5956\u7684\u5F62\u5F0F\u53D1\uFF0C\u5E73\u5E38\u6BCF\u6708\u53D1\u7684\u5DE5\u8D44\u6BD4\u8F83\u5C11\u3002</p><p><strong>\u8054\u901A</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-33ac9a8b-04d3-4adb-8482-e725e25bb2f9.png" alt=""></p><p>\u897F\u5B89\u8054\u901A\u8F6F\u4EF6\u7814\u7A76\u9662\uFF0C\u5E94\u5C4A\u7855\u58EB\u7684\u603B\u5305\u548C\u79FB\u52A8\u5DEE\u4E0D\u591A\uFF0C\u5927\u7EA6 16-19 \u4E07\u3002\u4E0D\u8FC7\u8054\u901A\u6BD4\u8F83\u6E05\u95F2\uFF0C\u5927\u90E8\u5206\u90E8\u95E8\u90FD\u80FD\u4E0B\u5348\u516D\u70B9\u5C31\u4E0B\u73ED\u3002\u76EE\u524D\u5728\u7F51\u4E0A\u7684\u8BC4\u4EF7\u76F8\u5BF9\u597D\u4E00\u4E9B\u3002</p><p><strong>\u5927\u5510</strong></p><p>\u5927\u5510\u7684\u52A0\u73ED\u633A\u4E25\u91CD\u7684\uFF0C\u5468\u5185\u9700\u8981\u6709\u4E09\u5929\u52A0\u73ED\u5230\u4E5D\u70B9\u3002\u5468\u672B\u9700\u8981\u52A0\u591F 8 \u4E2A\u5C0F\u65F6\u7684\u73ED\u3002</p><p><strong>\u70FD\u706B\u661F\u7A7A</strong></p><p>\u5F53\u65F6\u6765\u5B66\u6821\u6821\u62DB\u65F6\uFF0C\u8BF4\u5DE5\u8D44\u4F1A\u5728 10-20k \u4E4B\u95F4\uFF0C\u6839\u636E\u9762\u8BD5\u8868\u73B0\u8FDB\u884C\u5DE5\u8D44\u8BC4\u5B9A\u3002\u6700\u8FD1\u5728\u542C\u8BF4\u52A0\u73ED\u6BD4\u8F83\u4E25\u91CD\u3002</p><p><strong>\u592A\u6781\u96C6\u56E2</strong></p><p>\u6700\u521D 12306 \u4E3B\u8981\u5C31\u662F\u592A\u6781\u5F00\u53D1\u7684 \uFF0C\u521A\u642C\u6765\u897F\u5B89\u4E0D\u4E45\uFF0C\u7855\u58EB\u5DE5\u8D44\u6C34\u5E73\u662F\u5230\u624B 7-8k \u6BCF\u6708\uFF0C\u6BCF\u5E74 13 \u85AA\u3002\u5DE5\u4F5C\u7A33\u5B9A\u3002\u51FA\u5DEE\u591A\uFF0C\u52A0\u4E0A\u51FA\u5DEE\u8865\u52A9\u7684\u8BDD\u6BCF\u4E2A\u6708\u6536\u5165\u8FD8\u53EF\u4EE5\u3002</p><p><strong>\u8363\u8000</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-19d21a8f-6a45-408a-9f0f-ae8dd40bdbb1.png" alt=""></p><p>\u8363\u8000\u76EE\u524D\u7684\u62DB\u4EBA\u9700\u6C42\u662F\u5F88\u5927\u7684\uFF0C\u5DE5\u4F5C\u5F3A\u5EA6\u672A\u77E5\uFF0C\u85AA\u8D44\u6C34\u5E73\u76EE\u524D\u662F\u5B8C\u5168\u5BF9\u6807\u534E\u4E3A\u7684\u3002</p><p><strong>\u5357\u745E</strong></p><p>\u5357\u745E\u662F\u56FD\u5BB6\u7535\u7F51\u7684\u6280\u672F\u578B\u7814\u7A76\u9662\uFF0C\u76EE\u524D\u7684\u9879\u76EE\u4E5F\u57FA\u672C\u90FD\u662F\u56F4\u7ED5\u7535\u529B\u884C\u4E1A\u7684\u3002\u5357\u745E\u7684\u6821\u62DB\u5DE5\u8D44\u4F1A\u5728\u57FA\u7840\u4E0A\u6839\u636E\u5B66\u5386\u6765\u4EF7\u94B1\u3002\u897F\u5B89\u7684\u6821\u62DB\u5DE5\u8D44\u5E74\u85AA\u4E5F\u5728 15-20w \u8FD9\u4E2A\u8303\u56F4\u5185\u3002\u5927\u90E8\u5206\u90E8\u95E8\u51FA\u5DEE\u6BD4\u8F83\u591A\u3002</p><p><strong>\u6DA6\u8054\u79D1\u6280</strong></p><p>\u5DE5\u4F5C\u7A33\u5B9A\u3001\u85AA\u8D44\u8FD8\u53EF\u4EE5\u3002\u4E0D\u8FC7\u6DA6\u8054\u79D1\u6280\u6DF1\u5733\u90A3\u8FB9\u76F8\u5BF9\u597D\u4E00\u70B9\u3002</p><h3 id="\u94F6\u884C\u8F6F\u4EF6\u5F00\u53D1\u4E2D\u5FC3" tabindex="-1"><a class="header-anchor" href="#\u94F6\u884C\u8F6F\u4EF6\u5F00\u53D1\u4E2D\u5FC3" aria-hidden="true">#</a> \u94F6\u884C\u8F6F\u4EF6\u5F00\u53D1\u4E2D\u5FC3</h3><p>\u9664\u4E86\u94F6\u884C\u8F6F\u4EF6\u5F00\u53D1\u4E2D\u5FC3\uFF0C\u5404\u7701\u5206\u884C\u7684\u79D1\u6280\u90E8\u95E8\u5927\u5BB6\u4E5F\u53EF\u4EE5\u53BB\u8003\u8651\uFF0C\u8FD9\u91CC\u5C31\u4E0D\u5C55\u5F00\u4ECB\u7ECD\u4E86\u3002\u94F6\u884C\u7684\u8F6F\u4EF6\u5F00\u53D1\u4E2D\u5FC3\u5F85\u9047\u6C34\u5E73\u662F\u4E0D\u9519\u7684\uFF0C\u4E14\u57FA\u672C\u90FD\u5C5E\u4E8E\u603B\u884C\u7F16\u5236\uFF0C\u751F\u6D3B\u7A33\u5B9A\u3002\u76EE\u524D\u5BF9\u4E8E\u51C6\u5907\u7559\u5728\u897F\u5B89\u7684\u540C\u5B66\u6765\u8BF4\uFF0C\u53BB\u94F6\u884C\u7684\u8F6F\u4EF6\u5F00\u53D1\u4E2D\u5FC3\u662F\u4E00\u4E2A\u4E0D\u9519\u7684\u9009\u62E9\u3002\u4F46\u8FD1\u5E74\u6765\u6709\u4E00\u80A1\u94F6\u884C\u8F6F\u4EF6\u5F00\u53D1\u4E2D\u5FC3\u5B50\u516C\u53F8\u5316\u7684\u6D6A\u6F6E\uFF0C\u4ECA\u540E\u7684\u7A33\u5B9A\u6027\u672A\u77E5\u3002</p><p><strong>\u519C\u884C\u8F6F\u5F00</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-cfa06bd9-abd6-455e-bd5c-aef4c90f7edb.png" alt=""></p><p>\u519C\u884C\u8F6F\u5F00\u76EE\u524D\u662F\u5728\u897F\u5B89\u5DE5\u4F5C\u7684\u6700\u597D\u7684\u51E0\u4E2A\u9009\u62E9\u4E4B\u4E00\uFF0C\u7855\u58EB\u6BCF\u6708\u5230\u624B 12k\uFF0C\u672C\u79D1\u751F\u5C11\u51E0\u767E\u5757\u94B1\uFF0C\u5E74\u7EC8\u5956 2-4 \u4E2A\u6708\u3002\u5927\u90E8\u5206\u90E8\u95E8\u90FD\u80FD\u665A\u4E0A 7 \u70B9\u4EE5\u524D\u4E0B\u73ED\uFF0C\u5E76\u4E14\u5468\u672B\u53CC\u4F11\u3002\u76EE\u524D\u519C\u884C\u8F6F\u5F00\u6709\u5B50\u516C\u53F8\u5316\u8F6F\u4EF6\u5F00\u53D1\u4E2D\u5FC3\u7684\u8BA1\u5212\uFF0C\u542C\u6D88\u606F\u8BF4\u53EF\u4EE5\u9009\u62E9\u53BB\u5B50\u516C\u53F8\uFF0C\u4E5F\u53EF\u4EE5\u7559\u5728\u8F6F\u5F00\u3002\u76EE\u524D\u897F\u5B89\u7684\u519C\u884C\u8F6F\u5F00\u4E5F\u8D8A\u6765\u8D8A\u5377\uFF0C\u5927\u90E8\u5206\u7684 offer \u90FD\u7ED9\u4E86\u897F\u7535\u3001\u897F\u4EA4\u3001\u897F\u5DE5\u5927\u8FD9\u4E09\u4E2A\u5B66\u6821\u4E86\uFF0C\u53E6\u5916\u8FD9\u4E09\u4E2A\u5B66\u6821\u7684\u5B66\u751F\u73B0\u5728\u4E5F\u4E0D\u662F\u60F3\u53BB\u519C\u884C\u5C31\u80FD\u53BB\u4E86\u3002\u519C\u884C\u8F6F\u5F00\u6709\u4E2A\u786C\u6027\u89C4\u5B9A\u662F\u5FC5\u987B\u901A\u8FC7\u516D\u7EA7\u624D\u80FD\u62A5\u3002</p><p><strong>\u5DE5\u884C\u8F6F\u5F00</strong></p><p>\u897F\u5B89\u7684\u5DE5\u884C\u8F6F\u5F00\u5C5E\u4E8E\u603B\u884C\u5E8F\u5217\u3002\u672C\u79D1\u751F\u548C\u7855\u58EB\u751F\u8FDB\u5165\u5DE5\u884C\u540E\u804C\u7EA7\u90FD\u662F\u52A9\u7406\u7ECF\u7406\uFF0C\u5E74\u85AA\u603B\u5305 20 \u4E07\u5DE6\u53F3\uFF0C\u672C\u79D1\u751F\u6BCF\u6708\u5DE5\u8D44\u5C31\u6BD4\u7855\u58EB\u751F\u5C11\u51E0\u767E\u5757\u94B1\u3002\u5DE5\u884C\u8F6F\u5F00\u6BCF\u6708\u53D1\u7684\u5DE5\u8D44\u4F1A\u5C11\u4E00\u4E9B\uFF0C\u7136\u540E\u5E74\u7EC8\u4F1A\u4E00\u4E0B\u53D1\u597D\u51E0\u4E07\u7684\u5E74\u7EC8\u5956\u3002\u672C\u79D1\u751F\u9700\u8981\u4E24\u5E74\u624D\u80FD\u5347\u7ECF\u7406\u4E00\uFF0C\u7855\u58EB\u9700\u8981\u4E00\u5E74\u5C31\u53EF\u4EE5\u5347 \u7ECF\u7406\u4E00\u3002\u5347\u5230 \u7ECF\u7406\u4E00 \u540E\u8868\u73B0\u597D\u4E00\u5E74\u5C31\u53EF\u4EE5\u5347 \u7ECF\u7406\u4E8C\uFF0C\u4E0D\u8FC7\u4ECE\u52A9\u7406\u7ECF\u7406\u5230\u7ECF\u7406\u4E8C\u7684\u85AA\u8D44\u6DA8\u5E45\u4E0D\u5927\u3002\u4ECE\u6BD5\u4E1A\u5230\u5347\u804C\u6210\u4E3A\u7ECF\u7406\u4E09\uFF08\u76F8\u5F53\u4E8E\u7EC4\u957F\uFF09\u6700\u5FEB\u9700\u8981\u4E94\u5E74\uFF0C\u7ECF\u7406\u4E09\u7684\u5E74\u85AA\u8FD8\u662F\u5F88\u53EF\u89C2\u7684\u3002</p><p>\u8BFB\u8005\u8865\u5145\uFF1A\u897F\u5B89\u5DE5\u884C\u5468\u4E00\u3001\u5468\u4E8C\u3001\u5468\u56DB\u9700\u8981\u52A0\u73ED</p><p><strong>\u4E2D\u884C\u8F6F\u5F00</strong></p><p>\u897F\u5B89\u7684\u4E2D\u56FD\u94F6\u884C\u8F6F\u4EF6\u5F00\u53D1\u4E2D\u5FC3\u7ED9\u5E94\u5C4A\u7855\u58EB\u7684\u62A5\u4EF7\u662F\u5E74\u85AA 13 \u4E07\uFF0C\u5927\u5BB6\u53EF\u4EE5\u53C2\u8003\u4E00\u4E0B\u3002</p><p>\u4E2D\u884C\u8F6F\u5F00\u7684\u6280\u672F\u9762\u8BD5\u4E00\u822C\u95EE\u7684\u6280\u672F\u95EE\u9898\u6BD4\u8F83\u5C11\uFF0C\u90FD\u662F\u6700\u57FA\u672C\u7684\u95EE\u9898\uFF0C\u6BD4\u8F83\u7B80\u5355\u3002</p><p><strong>\u6D59\u5546\u94F6\u884C</strong></p><p>\u6D59\u5546\u94F6\u884C\u5728\u94F6\u884C\u8F6F\u5F00\u4E2D\u7ED9\u7684\u5DE5\u8D44\u7B97\u591A\u7684\uFF0C\u897F\u5B89\u7855\u58EB\u7684\u5E74\u85AA\u5305\u662F 25-28 \u4E07\uFF0C\u672C\u79D1\u751F\u7684\u5E74\u5305\u662F 19-23 \u4E07\u3002\u4E5F\u7B97\u4E00\u4E2A\u8FD8\u4E0D\u9519\u7684\u9009\u62E9\u4E86\u3002</p><p><strong>\u6D66\u53D1\u94F6\u884C</strong></p><p>\u6D66\u53D1\u94F6\u884C\u5728\u897F\u5B89\u7684\u8F6F\u4EF6\u5F00\u53D1\u4E2D\u5FC3\u88AB\u5B50\u516C\u53F8\u5316\u4E86\u3002\u5DE5\u8D44\u672C\u79D1\u662F\uFF085-7k\uFF09*24\uFF0C\u7855\u58EB\u662F 7.5k *24\u3002\u8FD9\u4E2A\u5DE5\u8D44\u662F\u4EC0\u4E48\u610F\u601D\u5462\uFF0C\u5C31\u662F\u6BCF\u4E2A\u6708\u7ED9\u4F60 5-7k\uFF0C\u7136\u540E\u5E74\u5E95\u518D\u4E00\u4E0B\u5B50\u7ED9\u4F60\u53D1 12 \u4E2A\u6708\u7684\u5DE5\u8D44\u5F53\u6210\u5E74\u7EC8\u5956\u3002</p><p><strong>\u90AE\u653F\u94F6\u884C</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-946ce62c-0afc-48c8-b570-fab660d2ea13.png" alt=""></p><p>\u90AE\u50A8\u94F6\u884C\u8F6F\u4EF6\u5F00\u53D1\u4E2D\u5FC3\u5728\u897F\u5B89\u521A\u6210\u7ACB\uFF0C\u8FD8\u4E0D\u592A\u786E\u5B9A\u3002\u76EE\u524D\u5BA3\u4F20\u662F\u5E74\u5305 28 \u4E07\u4EE5\u4E0A\uFF0C\u5DE5\u4F5C\u5F3A\u5EA6\u76EE\u6D4B\u6BD4\u8F83\u5927\u3002</p><p><strong>\u4E2D\u4FE1\u5EFA\u6295</strong></p><p>\u4E2D\u4FE1\u5EFA\u6295\u521A\u843D\u5728\u897F\u5B89\u4E0D\u4E45\uFF0C\u4ECA\u5E74\u5DF2\u7ECF\u5F00\u59CB\u6821\u62DB\u4E86\u3002\u4E2D\u4FE1\u5EFA\u6295\u76EE\u524D\u5728\u897F\u5B89\u7B97\u662F\u6027\u4EF7\u6BD4\u6700\u9AD8\u7684\u51E0\u4E2A\u597D\u53BB\u5904\u4E4B\u4E00\uFF0C\u5DE5\u8D44\u6C34\u5E73\u8F83\u9AD8\uFF0C\u6BCF\u5E74\u53D118\u4E2A\u6708\u7684\u5DE5\u8D44\uFF0C\u800C\u4E14\u5927\u90E8\u5206\u90E8\u95E8\u52A0\u73ED\u4E0D\u600E\u4E48\u4E25\u91CD\u3002\u4E2D\u4FE1\u5EFA\u6295YYDS\u3002\u4E0D\u8FC7\u76EE\u524D\u4E2D\u4FE1\u5EFA\u6295\u5B66\u5386\u5361\u7684\u6BD4\u8F83\u4E25\uFF0C\u8981\u6C42\u7855\u58EB985\uFF0C\u540C\u65F6\u672C\u79D1\u8FD8\u8981\u6C42211\uFF0C\u5076\u5C14\u4F1A\u653E\u5BBD\u677E\u4E00\u70B9\u672C\u79D1\u7684\u6761\u4EF6\u3002</p><h3 id="\u5916\u4F01" tabindex="-1"><a class="header-anchor" href="#\u5916\u4F01" aria-hidden="true">#</a> \u5916\u4F01</h3><p>\u4E00\u822C\u60C5\u51B5\u4E0B\uFF0C\u5916\u4F01\u7684\u5DE5\u4F5C\u5F3A\u5EA6\u4F1A\u66F4\u5C0F\u4E00\u70B9\uFF0C\u57FA\u672C\u90FD\u662F 955 \u548C 965 \u7684\u6837\u5B50\u3002</p><p><strong>\u4E09\u661F</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-31302c7c-7dcd-4f12-b624-872b4878670d.png" alt=""></p><p>\u5927\u90E8\u5206\u5E94\u5C4A\u751F\u90FD\u662F\uFF0811-14)k *13.5k\u3002965 \u5DE5\u4F5C\u5236\u3002\u51E0\u4E4E\u90FD\u662F\u82AF\u7247\u3001\u8FD0\u7EF4\u76F8\u5173\u5C97\u4F4D\u3002</p><p>\u6709\u8BFB\u8005\u8865\u5145\uFF1A\u4E09\u661F\u5DE5\u4F5C\u5236\u5EA6\u662F855\uFF0C16\u85AA\u3002\u53EF\u4EE5\u53C2\u8003\u3002</p><p><strong>SAP</strong></p><p>SAP \u662F\u4E00\u5BB6\u505A\u4F01\u4E1A\u8F6F\u4EF6\u7684\u5FB7\u4F01\uFF0C\u6280\u672F\u5341\u5206\u5F3A\u5927\u3002\u7855\u58EB\u5E74\u85AA 20 \u4E07\u5DE6\u53F3\uFF0C\u672C\u79D1\u751F\u5E74\u85AA 15 \u4E07\u5DE6\u53F3\u3002</p><p>\u4E0D\u8FC7\uFF0C\u6211\u6709\u4E00\u4E2A\u540C\u5B66\u53BB SAP \u9762\u8BD5\u4E4B\u540E\u56DE\u6765\u8BF4\u9762\u8BD5\u4F53\u9A8C\u975E\u5E38\u5DEE\u3002</p><p>\u8BFB\u8005\u8865\u5145\uFF1A\u897F\u5B89\u73B0\u5728\u7684SAP\u662F\u539F\u6765\u7684SyBase\u897F\u5B89\u5206\u516C\u53F8\uFF0C\u7531\u4E8E\u540E\u8005\u6574\u4F53\u88AB\u524D\u8005\u6536\u8D2D\u4E86\uFF0C\u6240\u4EE5\u540E\u8005\u5728\u897F\u5B89\u7684\u5206\u516C\u53F8\u81EA\u7136\u800C\u7136\u7684\u53D8\u6210\u4E86\u524D\u8005\u7684\u5206\u516C\u53F8\uFF0C\u548C\u5317\u4EACSAP\u5206\u516C\u53F8\uFF0C\u4E0A\u6D77\u3001\u6210\u90FD\u7684\u7814\u7A76\u5458\u7684\u6587\u5316\u90FD\u4E0D\u592A\u4E00\u6837\u3002</p><p><strong>Thougtworks</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-167d941b-740e-4342-9d28-1ba753766398.png" alt=""></p><p>\u5728 Thoughtworks \u5DE5\u4F5C\u662F\u5F88\u8212\u670D\u7684\uFF0C\u5F00\u653E\u5F0F\u529E\u516C\u3001\u6241\u5E73\u5316\u7BA1\u7406\u3001\u6280\u672F\u6C1B\u56F4\u6D53\u539A\u3002\u5DE5\u8D44\u672C\u7855\u90FD\u662F 13k x 14\u3002</p><p>ThougtWorks \u7684\u65B0\u4EBA\u57F9\u517B\u673A\u5236\u8FD8\u662F\u5F88\u8D5E\u7684\uFF01\u5BF9\u4E8E\u5E94\u5C4A\u751F\u5165\u804C ThougtWorks \u7684\u8BDD\uFF0C\u5728\u4F60\u6B63\u5F0F\u4E0A\u624B\u505A\u9879\u76EE\u4E4B\u524D\u4F1A\u6709 1 \u4E2A\u6708\u5DE6\u53F3\u7684\u57F9\u8BAD\u65F6\u95F4\u3002\u793E\u62DB\u7684\u8BDD\uFF0C\u6574\u4E2A\u6D41\u7A0B\u4E00\u822C\u4F1A\u6BD4\u8F83\u7B80\u5355\u70B9\uFF0C\u76F8\u5173\u4EBA\u5458\u5E26\u4F60\u4E86\u89E3\u4E86\u516C\u53F8\u7684\u57FA\u672C\u60C5\u51B5\u540E\uFF0C\u540E\u9762\u53EF\u80FD\u5C31\u4F1A\u8BA9\u4F60\u5F00\u59CB\u4E0A\u624B\u505A\u9879\u76EE\u4E86\u3002</p><p><strong>\u5176\u4ED6</strong></p><p>\u542C\u8BF4\u6C47\u4E30\u548C\u7231\u7ACB\u4FE1\u5728\u897F\u5B89\u4E5F\u6709\u8F6F\u4EF6\u5F00\u53D1\u4E2D\u5FC3\uFF0C\u5927\u5BB6\u611F\u5174\u8DA3\u53EF\u4EE5\u81EA\u884C\u53BB\u4E86\u89E3\u3002</p><p>\u8BFB\u8005\u8865\u5145\uFF1A\u7231\u7ACB\u4FE1\u5728\u897F\u5B89\u7684\u4E0D\u662F\u7814\u53D1\u4E2D\u5FC3\uFF08\u5176\u7814\u53D1\u5728\u4E0A\u6D77\u3001\u6210\u90FD\uFF0C\u5317\u4EAC\u4E5F\u6709\u4F46\u662F\u5C0F\uFF0C\u786C\u4EF6\u7814\u53D1\u5728\u5357\u4EAC\uFF09\uFF0C\u800C\u662F\u8FD0\u7EF4\u548C\u4EA4\u4ED8\u4E2D\u5FC3\u3002</p><p>\u8BFB\u8005\u8865\u5145\uFF1A\u6C47\u4E30\u5728\u897F\u5B89\u7684\u4E0D\u662F\u6C47\u4E30\u603B\u516C\u53F8\u7684\u8F6F\u5F00\uFF0C\u800C\u662F\u6536\u8D2D\u7684\u7684\u4E00\u5BB6\u5B50\u516C\u53F8\uFF0C\u4E5F\u662F\u5BB6\u94F6\u884C\u7684\u8F6F\u5F00\uFF0C\u4F46\u662F\u5F85\u9047\u4E5F\u4E0D\u5DEE\uFF0C\u6709\u5728\u62DB\u5F00\u53D1\u548C\u6D4B\u8BD5\u3002</p><h3 id="\u7814\u7A76\u6240" tabindex="-1"><a class="header-anchor" href="#\u7814\u7A76\u6240" aria-hidden="true">#</a> \u7814\u7A76\u6240</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-872dc3ff-316d-4194-b549-f998b39feedf.png" alt=""></p><p>\u897F\u5B89\u822A\u7A7A\u822A\u5929\u7C7B\u7684\u7814\u7A76\u6240\u7279\u522B\u591A\uFF0C\u6211\u77E5\u9053\u7684\u62DB\u8BA1\u7B97\u673A\u65B9\u9762\u7684\u7814\u7A76\u6240\u6709\u822A\u5929 504 \u6240\u3001771 \u6240\uFF0C\u822A\u7A7A 631 \u6240\u3001618 \u6240\u3001603 \u6240\uFF0C\u4E2D\u7535 20 \u6240\u300139 \u6240\uFF0C\u5175\u5668\u5DE5\u4E1A 203 \u6240\u3001204 \u6240\u3001205 \u6240\u3002</p><p>\u8FD9\u4E9B\u7814\u7A76\u6240\u4E2D\uFF0C\u5F85\u9047\u6700\u597D\u7684\u662F\u822A\u5929 504 \u6240\uFF0C\u4F46\u662F\u62DB\u4EBA\u7684\u8981\u6C42\u5F88\u9AD8\uFF0C\u76EE\u524D\u6821\u62DB\u8FDB\u53BB\u7684\u5927\u90E8\u5206\u662F\u535A\u58EB\uFF0C\u53CC 985 \u7855\u58EB\uFF08\u5C31\u662F\u672C\u79D1\u548C\u7814\u7A76\u751F\u90FD\u6BD5\u4E1A\u4E8E 985 \u9AD8\u6821\uFF09\u60F3\u8FDB\u90FD\u5F88\u96BE\u3002\u5176\u6B21 618 \u6240\u548C\u5175\u5668\u5DE5\u4E1A\u7684\u7814\u7A76\u6240\u5F85\u9047\u8FD8\u4E0D\u9519\uFF0C\u8FD9\u51E0\u4E2A\u7814\u7A76\u6240\u62DB\u8058\u6709\u4E00\u4E2A\u9690\u5F62\u7684\u8981\u6C42\u5C31\u662F\u53CC 985 \u7855\u58EB\u3002\u5176\u5B83\u6240\u7684\u6027\u4EF7\u6BD4\u5C31\u6BD4\u8F83\u5DEE\u4E86\u3002631 \u6240\u66FE\u7ECF\u88AB\u8A89\u4E3A\u897F\u5317\u7B2C\u4E00\u795E\u6240\uFF0C\u4F46\u76EE\u524D\u7684\u6548\u76CA\u4E5F\u4E0D\u884C\u4E86\uFF0C\u73B0\u5728\u7684\u5F85\u9047\u662F\u5E74\u85AA 10 \u4E07\uFF0C\u7B2C\u4E00\u5E74\u989D\u5916\u4F1A\u7ED9 5 \u4E07\u7684\u5B89\u5BB6\u8D39\u3002</p><h3 id="\u5916\u5305" tabindex="-1"><a class="header-anchor" href="#\u5916\u5305" aria-hidden="true">#</a> \u5916\u5305</h3><p>\u897F\u5B89\u6709\u7684\u51E0\u5BB6\u6BD4\u8F83\u5927\u7684\u662F\u4E2D\u8F6F\u56FD\u9645\u3001\u8F6F\u901A\u52A8\u529B\u548C\u6587\u601D\u6D77\u8F89\u3002\u4E2D\u8F6F\u56FD\u9645\u548C\u8F6F\u901A\u52A8\u529B\u4E3B\u8981\u662F\u5728\u7ED9\u534E\u4E3A\u505A\u5916\u5305\uFF0C\u5DE5\u4F5C\u5F3A\u5EA6\u51E0\u4E4E\u548C\u534E\u4E3A\u57FA\u672C\u4E00\u6837\u3002\u5916\u5305\u7684\u6027\u4EF7\u6BD4\u4E0D\u592A\u9AD8\u54C8\u3002</p><h2 id="\u751F\u6D3B" tabindex="-1"><a class="header-anchor" href="#\u751F\u6D3B" aria-hidden="true">#</a> \u751F\u6D3B</h2><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-980c455e-1858-4c52-8c4f-5c1b0ed996b4.png" alt=""></p><p>\u9655\u897F\u7684\u8D44\u6E90\u57FA\u672C\u90FD\u96C6\u4E2D\u5728\u897F\u5B89\uFF0C\u4ECE\u4EBA\u53E3\u4E0A\u4E5F\u80FD\u770B\u51FA\u897F\u5B89\u7684\u8D44\u6E90\u6709\u591A\u96C6\u4E2D\u3002\u6574\u4E2A\u9655\u897F\u4E09\u5343\u591A\u4E07\u4EBA\uFF0C\u5728\u897F\u5B89\u5C31\u6709\u4E00\u5343\u591A\u4E07\u3002\u5E76\u4E14\u8FD9\u4E9B\u5E74\u4E2D\u592E\u5BF9\u897F\u5B89\u7684\u6276\u690D\u529B\u5EA6\u8D8A\u6765\u8D8A\u5927\u3002</p><h3 id="\u623F\u4EF7" tabindex="-1"><a class="header-anchor" href="#\u623F\u4EF7" aria-hidden="true">#</a> \u623F\u4EF7</h3><p>\u897F\u5B89\u7684\u623F\u4EF7\u4ECE 18 \u5E74\u5230\u73B0\u5728\u7FFB\u4E86\u4E00\u500D\uFF0C\u4F46\u5C31\u76EE\u524D\u7684\u623F\u4EF7\u76F8\u8F83\u4E8E\u5176\u5B83\u540C\u7C7B\u578B\u57CE\u5E02\u7B97\u662F\u6BD4\u8F83\u53CB\u597D\u7684\u3002\u73B0\u5728\u897F\u5B89\u7684\u623F\u4EF7\u6700\u8D35\u7684\u5728\u66F2\u6C5F\u3001\u7B2C\u4E8C\u8D35\u662F\u9AD8\u65B0\u533A\u3002\u5176\u5B83\u5730\u65B9\u7684\u623F\u4EF7\u5DEE\u4E0D\u591A\u4E00\u4E07\u516D\u5DE6\u53F3\u5427\uFF0C\u4E0D\u8FC7\u4ECA\u5E74\u7684\u5168\u8FD0\u4F1A\u8FC7\u540E\u53EF\u80FD\u4F1A\u957F\u4E00\u6CE2\u3002\u6309\u7167\u7A0B\u5E8F\u5458\u7684\u5DE5\u8D44\u6765\u8BF4\uFF0C\u5728\u897F\u5B89\u4E70\u623F\u7684\u95EE\u9898\u4E0D\u7B97\u5F88\u5927\uFF0C\u8FD9\u4E5F\u662F\u7A0B\u5E8F\u5458\u5F85\u5728\u897F\u5B89\u6BD4\u8F83\u8212\u670D\u7684\u5730\u65B9\u3002\u5BF9\u4E8E\u7A0B\u5E8F\u5458\u6765\u8BF4\uFF0C\u79DF\u623F\u7684\u538B\u529B\u76F8\u5BF9\u8F83\u5C0F\uFF0C\u6211\u540C\u5B66\u6709\u5728\u519C\u884C\u8F6F\u5F00\u5DE5\u4F5C\u7684\uFF0C\u5728\u9644\u8FD1\u79DF\u4E86\u4E00\u4E2A\u4E00\u5C45\u5BA4\u7684\u5F00\u95F4\u56DB\u5341\u5E73\u5DE6\u53F3\uFF0C\u4E00\u4E2A\u6708\u4E00\u5343\u4E94\uFF0C\u4E0A\u73ED\u6B65\u884C\u7528\u4E0D\u4E86\u5341\u5206\u949F\u3002\u9AD8\u65B0\u90A3\u8FB9\u79DF\u623F\u8D35\u4E00\u4E9B\uFF0C\u4F60\u613F\u610F\u5408\u79DF\u7684\u8BDD\u538B\u529B\u4E5F\u4E0D\u5927\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-b905fada-e4a5-4a0a-a704-cbf9f310be6c.png" alt=""></p><p>\u897F\u5B89\u4F4F\u5EFA\u524D\u6BB5\u65F6\u95F4\u51FA\u4E86\u4E8C\u624B\u623F\u4EA4\u6613\u53C2\u8003\u4EF7\u683C\uFF0C\u6211\u8D34\u5728\u4E0B\u9762\u5927\u5BB6\u53EF\u4EE5\u53C2\u8003\u4E0B\uFF0C\u4E0D\u8FC7\u8FD9\u4E2A\u4EF7\u683C\u611F\u89C9\u4F4E\u4E8E\u5E02\u573A\u4EF7\u4E86\u3002\u6211\u611F\u89C9\u8FD9\u76F4\u63A5\u6253\u4E86\u4E2A\u516B\u6298~\u897F\u5B89\u4F4F\u5EFA\u53D1\u5E03\u4E8C\u624B\u623F\u4EA4\u6613\u53C2\u8003\u4EF7\u683C\u7684\u94FE\u63A5\u5728\u8FD9\u91CC https://mp.weixin.qq.com/s/Gis7kIJklWygTseztydDaw</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-c22be12f-8426-487d-b256-96d7e8950762.png" alt="image-20210720212848036"></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-fb06e9b2-ba0b-46d3-b84a-5449a77dc6ae.png" alt="image-20210720212821035"></p><h3 id="\u6559\u80B2\u8D44\u6E90" tabindex="-1"><a class="header-anchor" href="#\u6559\u80B2\u8D44\u6E90" aria-hidden="true">#</a> \u6559\u80B2\u8D44\u6E90</h3><p>\u897F\u5B89\u7684\u6559\u80B2\u8D44\u6E90\u5F88\u597D\u3002\u9AD8\u4E2D\u6559\u80B2\u8D44\u6E90\u65B9\u9762\uFF0C\u897F\u5B89\u7684\u540D\u6821\u4F17\u591A\u3002\u897F\u5DE5\u5927\u9644\u4E2D\u3001\u897F\u5B89\u94C1\u4E00\u4E2D\u3001\u9AD8\u65B0\u4E00\u4E2D\u3001\u4EA4\u5927\u9644\u4E2D\u3001\u9655\u5E08\u5927\u9644\u4E2D\u8FD9\u4E9B\u5B66\u6821\u5728\u5168\u56FD\u90FD\u662F\u5F88\u6709\u540D\u7684\uFF0C\u53E6\u5916\u8FD8\u6709\u4E00\u6279\u5728\u9655\u897F\u7701\u5F88\u6709\u540D\u7684\u9AD8\u4E2D\u4E5F\u5F88\u4E0D\u9519\u3002\u5927\u5B66\u6559\u80B2\u8D44\u6E90\u65B9\u9762\uFF0C\u6574\u4E2A\u9655\u897F\u6709\u4E09\u6240 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211 \u4EE5\u4E0A\u6BD5\u4E1A\u7684\u7855\u58EB\u751F\u3002</p><h3 id="\u533B\u7597\u8D44\u6E90" tabindex="-1"><a class="header-anchor" href="#\u533B\u7597\u8D44\u6E90" aria-hidden="true">#</a> \u533B\u7597\u8D44\u6E90</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-e6f524ec-e353-48c2-b89a-cd2ca6373924.png" alt=""></p><p>\u533B\u7597\u8D44\u6E90\u65B9\u9762\u897F\u5B89\u4E5F\u5F88\u7ED9\u529B\uFF0C\u4EA4\u5927\u4E00\u9644\u9662\u3001\u4EA4\u5927\u4E8C\u9644\u9662\u3001\u5510\u90FD\u533B\u9662\u3001\u897F\u4EAC\u533B\u9662\u3001\u7EA2\u4F1A\u533B\u9662\u90FD\u662F\u653E\u5728\u5168\u56FD\u90FD\u5F88\u5F3A\u7684\uFF0C\u53E6\u5916\u5176\u4ED6\u4E00\u6279\u7701\u5185\u6BD4\u8F83\u6709\u540D\u7684\u533B\u9662\u4E5F\u5F88\u4E0D\u9519\u3002</p><h3 id="\u4EA4\u901A" tabindex="-1"><a class="header-anchor" href="#\u4EA4\u901A" aria-hidden="true">#</a> 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alt=""></p><p>\u53E6\u5916\uFF0C\u5927\u5510\u4E0D\u591C\u57CE\u8FD9\u91CC\u7684\u4EBA\u662F\u771F\u7684\u591A\uFF0C\u5C24\u5176\u662F\u590F\u5929\uFF0C\u665A\u4E0A\u7684\u65F6\u5019\u57FA\u672C\u6253\u4E0D\u5230\u8F66\uFF01</p><h3 id="\u6C14\u5019" tabindex="-1"><a class="header-anchor" href="#\u6C14\u5019" aria-hidden="true">#</a> \u6C14\u5019</h3><p>\u6C14\u5019\u65B9\u9762\uFF0C\u897F\u5B89\u4ECE 5 \u6708\u521D\u5F00\u59CB\u5C31\u5F00\u542F\u9AD8\u6E29\u6A21\u5F0F\uFF0C\u4E00\u76F4\u5EF6\u7EED\u5230 10 \u6708\u4E2D\u65EC\u3002\u6211\u7B2C\u4E00\u6B21\u53BB\u897F\u5B89\u65F6\u662F 8 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diff --git a/dist/assets/xian.html.4a14941e.js b/dist/assets/xian.html.4a14941e.js
deleted file mode 100644
index 2c925dc3..00000000
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+++ /dev/null
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diff --git a/dist/assets/xian.html.b0d9fb64.js b/dist/assets/xian.html.b0d9fb64.js
new file mode 100644
index 00000000..ba488951
--- /dev/null
+++ b/dist/assets/xian.html.b0d9fb64.js
@@ -0,0 +1 @@
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id="\u4E92\u8054\u7F51" tabindex="-1"><a class="header-anchor" href="#\u4E92\u8054\u7F51" aria-hidden="true">#</a> \u4E92\u8054\u7F51</h3><p><strong>\u534E\u4E3A</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-4e82d879-bbe0-4bc5-a088-fadc84483d65.png" alt=""></p><p>\u5982\u679C\u60F3\u5728\u897F\u5B89\u5FEB\u901F\u6323\u94B1\u7684\u8BDD\uFF0C\u534E\u4E3A\u51E0\u4E4E\u662F\u6700\u597D\u7684\u9009\u62E9\u4E86\uFF0C\u6309\u7167\u534E\u4E3A\u7684\u5DE5\u8D44\u6C34\u5E73\u5728\u897F\u5B89\u4E70\u623F\u6839\u672C\u6CA1\u6709\u538B\u529B\u3002\u534E\u4E3A\u5728\u897F\u5B89\u7684\u5EFA\u5236\u5F88\u9F50\u5168\uFF0C\u6D88\u8D39\u8005\u3001CloudBu\u3001\u4E91\u6838\u5FC3\u7B49\u4E8B\u4E1A\u7FA4\u4EE5\u53CA<code>\u534E\u4E3A\u6D77\u601D</code>\uFF0C2012 \u5B9E\u9A8C\u5BA4\u90FD\u6709\u3002\u4F46\u662F\u56E0\u4E3A\u53BB\u5E74\u7F8E\u56FD\u5BF9\u534E\u4E3A\u7684\u6253\u538B\uFF0C\u6D88\u8D39\u8005\u3001\u534E\u4E3A\u6D77\u601D\u4EE5\u53CA 2012 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\u4EE5\u540E\u5C31\u53EF\u4EE5\u8D70\u3002\u6BCF\u4E2A\u6708\u7684\u6700\u540E\u4E00\u4E2A\u5468\uFF0C\u5468\u516D\u8981\u5E38\u6001\u5316\u52A0\u73ED\u3002\u534E\u4E3A\u4EA7\u54C1\u7EBF\u7684\u90E8\u95E8\u662F\u76F8\u5F53\u5FD9\u7684\uFF0C\u52A0\u73ED\u5230\u51E0\u70B9\u5C31\u8BF4\u4E0D\u597D\u4E86\u3002\u4E0D\u8FC7\u534E\u4E3A\u7684\u52A0\u73ED\u8D39\u662F\u7ED9\u7684\u76F8\u5F53\u5230\u4F4D\u7684\uFF0C\u4E0D\u4F1A\u8BA9\u4F60\u767D\u52A0\u73ED\u7684\u3002\u53E6\u5916\u5916\u754C\u5BF9\u534E\u4E3A\u5458\u5DE5\u7684\u6280\u672F\u8BA4\u53EF\u5EA6\u662F\u6BD4\u8F83\u9AD8\u7684\uFF0C\u4ECE\u534E\u4E3A\u8DF3\u51FA\u6765\u53BB\u897F\u5B89\u7684\u4EFB\u4F55\u4E00\u5BB6\u6280\u672F\u516C\u53F8\u90FD\u6CA1\u592A\u5927\u538B\u529B\u3002</p><p>\u8BFB\u8005\u8865\u5145\uFF1A\u534E\u4E3A\u73B0\u5728\u9664\u975E\u662F\u5E94\u5C4A\u751F\uFF0C\u5426\u5219\u57FA\u672C\u662FOD\uFF08Outsourcing Dispacth\uFF0C\u4E5F\u662F\u4E00\u79CD\u5916\u5305\uFF0C\u548CFESCO\u7B7E\u5408\u540C\uFF0C\u4F46\u76F4\u7CFB\u9886\u5BFC\u90FD\u662F\u534E\u4E3A\u7684\u4EBA\uFF0C\u800C\u4E0D\u662F\u5728\u4E59\u65B9\u516C\u53F8\u7684\u56E2\u961F\u91CC\u7ED9\u7532\u65B9\u534E\u4E3A\u5E72\u6D3B\uFF09\uFF0C\u4E0D\u80FD\u62FF\u80A1\u7968\u3002\u5982\u679C\u4F60\u60F3\u8D5A\u94B1\uFF0C\u53EF\u4EE5\u653E\u5F03\u4E00\u5207\u9876\u4F4F\u538B\u529B\uFF0C\u53BB\u534E\u4E3A\u8FD8\u4E0D\u9519\uFF0C\u4F46\u4E5F\u8981\u6CE8\u610F\u90E8\u95E8\uFF0C\u65E0\u7EBF\u7F51\uFF0C\u6838\u5FC3\u7F51\uFF0C\u8FD8\u6709\u73B0\u5728\u7684\u8F66\u8054\u7F51\u8FD8\u4E0D\u9519\uFF0C\u4F46\u662F\u4E0D\u5EFA\u8BAE\u8003\u8651\u73B0\u5728\u7684\u7EC8\u7AEF\u4E86\u3002</p><p><strong>\u963F\u91CC\u5DF4\u5DF4</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-135b1f20-48ad-4295-bc50-40969ef023b0.png" alt=""></p><p>\u963F\u91CC\u5DF4\u5DF4\u8FD8\u6CA1\u5927\u8303\u56F4\u7684\u5728\u897F\u5B89\u62DB\u4EBA\uFF0C\u60C5\u51B5\u76EE\u524D\u8FD8\u4E0D\u592A\u6E05\u695A\u3002\u6211\u95EE\u8FC7\u963F\u91CC\u5DF4\u5DF4\u7684\u5458\u5DE5\uFF0C\u53EA\u77E5\u9053\u76EE\u524D\u5728\u897F\u5B89\u8BBE\u70B9\u7684\u90E8\u95E8\u662F\u963F\u91CC\u4E91\uFF0C\u9700\u8981\u534A\u5E74\u5728\u676D\u5DDE\u4E0A\u73ED\uFF0C\u534A\u5E74\u5728\u897F\u5B89\u4E0A\u73ED\uFF0C\u5DE5\u8D44\u6C34\u5E73\u548C\u676D\u5DDE\u4E00\u81F4\u3002\u4E0D\u8FC7\u76EE\u524D\u62DB\u7684\u91CF\u6BD4\u8F83\u5C0F\uFF0C\u57FA\u672C\u90FD\u662F\u62DB\u9AD8p\uFF0C\u4E3B\u8981\u662F\u505A\u552E\u524D\u7684\u4E1A\u52A1\u67B6\u6784\u8BBE\u8BA1\uFF0C\u53EA\u6709\u5F88\u5C11\u7684\u6821\u62DB\u540D\u989D\u3002</p><p><strong>\u4EAC\u4E1C</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-c9b0621d-f56c-42a0-a618-f261466f06a4.png" alt=""></p><p>\u4EAC\u4E1C\u628A\u4EAC\u4E1C\u7269\u6D41\u7684\u56E2\u961F\u8BBE\u5728\u4E86\u897F\u5B89\u822A\u5929\u57CE\uFF0C\u76EE\u6D4B\u56E2\u961F\u89C4\u6A21\u5728\u51E0\u767E\u4EBA\uFF0C\u5DE5\u8D44\u6C34\u5E73\u5927\u7EA6\u662F\u4EAC\u4E1C\u5728\u5317\u4EAC\u5DE5\u8D44\u7684 80%\u3002\u5927\u5BB6\u53EF\u4EE5\u53C2\u8003\u4E00\u4E0B\uFF0C\u4EAC\u4E1C\u53BB\u5E74\u5728\u5317\u4EAC\u7684\u90E8\u95E8\uFF0C\u6821\u62DB\u666E\u901A offer \u662F\u5E74\u5305 28 \u4E07\uFF0Csp \u662F\u5E74\u5305 32.9 \u4E07\u3002</p><p>\u4E00\u4F4D\u5728\u897F\u5B89\u4EAC\u4E1C\u7684\u8BFB\u8005\u8865\u5145\uFF1A\u4E0A\u73ED\u65E99\u70B9\u665A7\u70B9\uFF0C\u5468\u516D\u6CA1\u6709\u57F9\u8BAD\u4E0D\u7528\u6765\u3002</p><p><strong>\u817E\u8BAF\u4E91</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-67aa194e-52b0-4acb-b22b-1c1f4c09fac8.png" alt=""></p><p>\u817E\u8BAF\u4E91\u662F\u817E\u8BAF\u7684\u5168\u8D44\u5B50\u516C\u53F8\uFF0C\u76EE\u524D\u5BF9\u8FD9\u91CC\u8912\u8D2C\u4E0D\u4E00\u3002\u6821\u62DB\u85AA\u8D44\u6C34\u5E73\u672C\u79D1\u548C\u7855\u58EB\u751F\u5927\u6982\u662F\u6708\u85AA 13-16k\uFF0C\u6BCF\u5E74 16 \u85AA\uFF0C\u5927\u5BB6\u53EF\u4EE5\u53C2\u8003\u4E00\u4E0B\uFF0C\u817E\u8BAF 21 \u5C4A\u6821\u62DB\u7684\u85AA\u8D44\u662F 17-21.5k \uFF0C\u6BCF\u5E74 18 \u85AA\u3002\u793E\u62DB\u6211\u770B\u4E00\u4E2A\u672C\u79D1\u6BD5\u4E1A\u56DB\u5E74\u7ECF\u9A8C\u7684\u8001\u54E5\u62FF\u5230\u7684\u5E74\u5305\u662F 33 \u4E07\u3002\u817E\u8BAF\u4E91\u7684\u804C\u7EA7\u548C\u817E\u8BAF\u4E0D\u662F\u5BF9\u9F50\u7684\uFF0C\u5E76\u4E14\u4E1A\u52A1\u6BD4\u8F83\u8FB9\u7F18\uFF0C\u8FD9\u4E5F\u662F\u7F51\u4E0A\u88AB\u55B7\u7684\u4E00\u4E2A\u4E3B\u8981\u539F\u56E0\u3002\u76EE\u524D\u897F\u5B89\u817E\u8BAF\u4E91\u521B\u7ACB\u65F6\u95F4\u4E0D\u4E45\uFF0C\u52A0\u73ED\u5F3A\u5EA6\u662F\u6BD4\u8F83\u5927\u7684\u3002</p><p><strong>\u5B57\u8282\u8DF3\u52A8\u3001\u5C0F\u7C73\u3001ViVO\u3001OPPO</strong></p><p>\u5C0F\u7C73\u5DF2\u7ECF\u786E\u5B9A\u5728\u897F\u5B89\u8BBE\u7ACB\u7814\u53D1\u4E2D\u5FC3\u4E86\uFF0C\u4F46\u5177\u4F53\u662F\u54EA\u4E9B\u90E8\u95E8\u8FD8\u4E0D\u592A\u6E05\u695A\u3002\u5B57\u8282\u8DF3\u52A8\u4E4B\u524D\u5728\u897F\u5B89\u7684\u90E8\u95E8\u662F\u5BA1\u6838\u76F8\u5173\u7684\u5C97\u4F4D\uFF0C\u76EE\u524D\u4E5F\u6709\u8F83\u4E3A\u786E\u5B9A\u7684\u6D88\u606F\u4F1A\u5728\u897F\u5B89\u8BBE\u7ACB\u7814\u53D1\u4E2D\u5FC3\uFF0C\u5927\u5BB6\u611F\u5174\u8DA3\u7684\u8BDD\u6301\u7EED\u5173\u6CE8\u3002\u4ECA\u5E74vivo\u5728\u7EBF\u9AD8\u65B0\u73AF\u666E\u4E5F\u8BBE\u7ACB\u7814\u53D1\u90E8\u95E8\u4E86\uFF0C\u542C\u8BF4\u5F85\u9047\u4E0D\u9519\u3002OPPO\u5728\u897F\u5B89\u4E5F\u662F\u521A\u8BBE\u7ACB\u7814\u53D1\u90E8\u95E8\u4E0D\u4E45\uFF0C\u62DB\u4EBA\u6BD4\u8F83\u75AF\u72C2\uFF0C\u542C\u8BF4\u52A0\u73ED\u4E5F\u5F88\u75AF\u72C2\u3002</p><p><strong>\u5E7F\u8054\u8FBE</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-9180be40-265e-42e5-9a85-4d61193b8798.png" alt=""></p><p>\u5E7F\u8054\u8FBE\u897F\u5B89\u7684\u90E8\u95E8\u5728\u9488\u5BF9 21 \u5C4A\u6BD5\u4E1A\u751F\u7684\u6821\u62DB\u4E2D\u5F00\u51FA\u7684\u85AA\u8D44\u662F\u5F88\u6709\u8BDA\u610F\u7684\u3002\u7ED9\u5E94\u5C4A\u7855\u58EB\u7684 sp \u662F 19k x 15\uFF0C\u666E\u901A offer \u662F 17k x 15\uFF0C\u672C\u79D1\u751F\u6BCF\u6708\u57FA\u672C\u90FD\u5728 13-17k \u4E4B\u95F4\u3002\u5E7F\u8054\u8FBE\u5DE5\u4F5C\u5236\u5EA6\u57FA\u672C\u662F 965 \u6216\u8005 975\uFF0C\u6BCF\u4E2A\u6708\u8FD8\u6709\u4E00\u5929\u7684\u5E26\u85AA\u75C5\u5047\u3002\u8FD9\u8FD8\u8981\u5565\u81EA\u884C\u8F66\uFF1F\u4E0D\u8FC7\u5E7F\u8054\u8FBE\u66FE\u7ECF\u4E5F\u6709\u8FC7\u9ED1\u6599\uFF0C\u5927\u5BB6\u81EA\u884C\u4E0A\u7F51\u4E86\u89E3\u3002</p><p><strong>\u6D59\u6C5F\u5927\u534E\u3001\u6D77\u5EB7\u5A01\u89C6</strong></p><p>\u6D77\u5EB7\u5A01\u89C6\u5176\u5B9E\u662F\u56FD\u4F01\uFF0C\u4F46\u662F\u6D77\u5EB7\u5A01\u89C6\u548C\u5927\u534E\u5DE5\u4F5C\u5F3A\u5EA6\u548C\u5F85\u9047\u65B9\u9762\u7279\u522B\u4E00\u81F4\uFF0C\u5C31\u653E\u4E00\u5757\u8BF4\u4E86\u3002\u5927\u534E\u548C\u6D77\u5EB7\u5A01\u89C6\u5728\u897F\u5B89\u90FD\u6709\u8BBE\u7ACB\u7814\u53D1\u57FA\u5730\u7684\uFF0C\u5E76\u4E14\u62DB\u4EBA\u5F88\u591A\u3002\u8FD9\u54E5\u4FE9\u76EE\u524D\u5728\u7F51\u4E0A\u88AB\u55B7\u7684\u6BD4\u8F83\u72E0\uFF0C\u636E\u8BF4\u5DE5\u4F5C\u5F3A\u5EA6\u5F88\u5927\uFF0C\u4F46\u5DE5\u8D44\u6C34\u5E73\u53C8\u5F88\u4F4E\uFF0C\u5E76\u4E14\u6DA8\u85AA\u7F13\u6162\u3002\u5927\u5BB6\u5982\u679C\u60F3\u53BB\u8FDB\u4E00\u6B65\u4E86\u89E3\u53EF\u4EE5\u53BB\u627E\u8FD9\u4E24\u4E2A\u5382\u5B50\u7684\u5458\u5DE5\u54C8\u3002</p><p><strong>360</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-327db5f0-4061-48c3-b672-b1670f98325f.png" alt=""></p><p>360 \u5728\u897F\u5B89\u53EA\u6709\u4E00\u4E2A\u51E0\u5341\u4EBA\u7684\u56E2\u961F\u3002\u6CA1\u542C\u8BF4\u8FC7\u8FD9\u91CC\u6709\u6821\u62DB\uFF0C\u793E\u62DB\u7684\u8BDD 3 \u5E74\u4EE5\u4E0A\u7ECF\u9A8C\u7684\u5DEE\u4E0D\u591A\u80FD\u6BCF\u6708\u7ED9\u5230 20k \u3002\u6709\u8BF4\u5728\u8FD9\u91CC\u5F85\u7684\u8212\u670D\u7684\uFF0C\u4E5F\u6709\u55B7\u7684\u3002</p><p><strong>\u5947\u5B89\u4FE1</strong></p><p>\u5947\u5B89\u4FE1\u5728\u6821\u62DB\u7684\u5DE5\u8D44\u548C\u4E2D\u5174\u5DEE\u4E0D\u591A\uFF0C\u5E74\u85AA 20 \u4E07 \u5DE6\u53F3\uFF0C\u5DE5\u4F5C\u5236\u5EA6\u662F 1085\u3002\u5728\u897F\u5B89\u62DB\u7684\u4EBA\u8FD8\u662F\u633A\u591A\u7684\u3002</p><p><strong>\u79D1\u5927\u8BAF\u98DE</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-3592f841-8390-4399-ae8a-94c4368541ea.png" alt=""></p><p>\u79D1\u5927\u8BAF\u98DE\u897F\u5B89\u4E1D\u8DEF\u603B\u90E8\u4E3B\u8981\u662F\u7B97\u6CD5\u5C97\uFF0C\u4E0D\u8FC7\u6211\u770B\u7F51\u4E0A\u55B7\u7684\u6BD4\u8F83\u591A\u3002\u636E\u8BF4\u662F\u6D3B\u591A\u94B1\u5C11\u3002</p><p><strong>\u5927\u7586</strong></p><p>\u5728\u897F\u5B89\u7684\u5C97\u4F4D\u53EA\u6709\u76F8\u673A\u5D4C\u5165\u5F0F\u548C\u6D4B\u8BD5\u5C97\u4F4D\uFF0C\u5DE5\u8D44\u6BD4\u534E\u4E3A\u8FD8\u8981\u7565\u9AD8\u3002</p><p><strong>OPPO</strong></p><p>21 \u5E74\u5E74\u521D\u521A\u5728\u897F\u5B89\u6210\u7ACB\uFF0C\u6700\u8FD1\u75AF\u72C2\u62DB\u4EBA\u3002\u52A0\u73ED\u4E25\u91CD\u3002</p><p><strong>\u7EFF\u76DF</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-b70c6624-f4f1-453f-9ec8-5db22661bb18.png" alt=""></p><p>\u7EFF\u76DF\u7B97\u662F\u4E2D\u578B\u4F01\u4E1A\u91CC\u6BD4\u8F83\u9999\u7684\uFF0C\u7EFF\u76DF\u5728\u5B89\u5168\u9886\u57DF\u8FD8\u662F\u6BD4\u8F83\u5F3A\u7684\u3002\u5DE5\u8D44\u6BD4\u8F83\u4F4E\uFF0C\u7855\u58EB\u6821\u62DB\u624D\u80FD\u7ED9\u5230 14k x 14\uFF0C\u4F46\u662F\u8FD9\u5BB6\u516C\u53F8\u51E0\u4E4E\u4E0D\u52A0\u73ED\uFF0C\u5458\u5DE5\u7684\u79BB\u804C\u7387\u4E5F\u4E00\u76F4\u5F88\u4F4E\uFF0C\u6211\u540C\u5B66\u6709\u8FDD\u7EA6\u4E2D\u5174\u4E09\u65B9\u53BB\u7EFF\u76DF\u7684\u3002</p><p>\u8BFB\u8005\u8865\u5145\uFF1A\u6700\u8FD1\u5728\u7EFF\u76DF\u79D1\u6280\u5B9E\u4E60\u6D4B\u8BD5\uFF0C\u6DF1\u5207\u4F53\u4F1A\u5230\u517B\u8001\u578B\u516C\u53F8\u3002\u4E0D\u52A0\u73ED\u3002</p><p><strong>\u5F53\u5F53\u7F51</strong></p><p>\u65E9 9 \u665A 8 \u70B9\u534A\uFF0C\u5468\u672B\u53CC\u4F11\u3002\u7EC4\u5185\u6C1B\u56F4\u8FD8\u4E0D\u9519</p><p><strong>\u4EA4\u53C9\u4FE1\u606F\u6838\u5FC3\u6280\u672F\u7814\u7A76\u9662</strong></p><p>\u4E3B\u8981\u505A\u4EBA\u5DE5\u667A\u80FD\u3002\u80CC\u666F\u5F88\u5F3A\u5927\u3002\u5927\u4F6C\u59DA\u671F\u667A\u5E26\u961F\uFF0C\u6709 30 \u4F4D\u6E05\u534E\u4EA4\u53C9\u4FE1\u606F\u7814\u7A76\u9662\u7684\u6559\u6388\u53C2\u4E0E\u8FD0\u8425\u3002\u62DB\u4EBA\u7684\u8981\u6C42\u5F88\u9AD8\u3002</p><p><strong>\u5BD2\u6B66\u7EAA</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-fdf08fc3-d216-4382-913d-5f8b78b8e7df.png" alt=""></p><p>\u5BD2\u6B66\u7EAA\u662F\u505A\u667A\u80FD\u82AF\u7247\u7684\u516C\u53F8\uFF0C\u80CC\u540E\u7AD9\u7740\u4E2D\u79D1\u9662\u8BA1\u7B97\u6240\u30022019 \u5E74\u843D\u6237\u7684\u897F\u54B8\u65B0\u533A\uFF0C\u76F8\u5173\u4FE1\u606F\u6BD4\u8F83\u5C11\u3002\u6211\u77E5\u9053\u7684\u662F\u52A0\u73ED\u6BD4\u8F83\u591A\uFF0C\u4E0D\u8FC7\u85AA\u8D44\u4E5F\u9AD8\u3002</p><p><strong>\u5176\u4ED6</strong></p><p>\u5176\u5B83\u7684\u4E2D\u578B\u79C1\u4F01\u6211\u5C31\u4E0D\u4E00\u4E2A\u4E2A\u70B9\u8BC4\u4E86\uFF0C\u6211\u628A\u5728\u897F\u5B89\u8BBE\u7ACB\u7814\u53D1\u90E8\u95E8\u7684\u516C\u53F8\u540D\u5B57\u5217\u5728\u8FD9\u91CC\uFF0C\u5927\u5BB6\u611F\u5174\u8DA3\u81EA\u5DF1\u53BB\u4E86\u89E3\u3002</p><p>\u8BFA\u74E6\u79D1\u6280\uFF08\u897F\u7535\u7684\u8001\u5E08\u5F00\u7684\uFF09\u3001\u4F18\u4FE1\u4E8C\u624B\u8F66\u3001\u7F8E\u6797\u6570\u636E\u3001\u4EA4\u5927\u6377\u666E\u3001\u4EA4\u5927\u957F\u5929\u3001\u897F\u7535\u6377\u901A\u3001\u8461\u8404\u57CE\u3001\u5168\u65F6\u4E91\u3001\u795E\u7B56\u6570\u636E\u3002</p><h3 id="\u56FD\u4F01" tabindex="-1"><a class="header-anchor" href="#\u56FD\u4F01" aria-hidden="true">#</a> \u56FD\u4F01</h3><p>\u611F\u89C9\u897F\u5B89\u51E0\u5BB6\u56FD\u4F01\u7684\u6027\u4EF7\u6BD4\u7565\u4F4E\uFF0C\u5DE5\u8D44\u4E0D\u9AD8\uFF0C\u4E14\u5927\u90E8\u5206\u52A0\u73ED\u4E25\u91CD\u3002\u6821\u62DB\u5E94\u5C4A\u7855\u58EB\u5DE5\u8D44\u7A0E\u524D\u5E74\u85AA\u57FA\u672C\u90FD\u5728 15w-20w \u4E4B\u95F4\uFF0C\u672C\u79D1\u751F\u7684\u5E74\u85AA\u6BD4\u7855\u58EB\u5C11 3w \u5DE6\u53F3\u3002\u56FD\u4F01\u76F8\u8F83\u4E8E\u79C1\u4F01\u6DA8\u85AA\u4F1A\u6162\u5F88\u591A\uFF0C\u4E0D\u8FC7\u76F8\u5BF9\u7A33\u5B9A\u4E00\u4E9B\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-e12acc1d-4b6d-4f2e-a352-7155b527fa07.png" alt=""></p><p><strong>\u4E2D\u5174</strong></p><p>\u4E2D\u5174\u6821\u62DB\u7684\u84DD\u5251\u8BA1\u5212\u8FD8\u662F\u7ED9\u7684\u633A\u591A\u7684\uFF0C\u53BB\u5E74\u84DD\u5251\u8BA1\u5212\u7ED9\u51FA\u7684\u85AA\u8D44\u5305\u662F 40 \u4E07\u4EE5\u4E0A\uFF0C\u4E0D\u8FC7\u540D\u989D\u5F88\u5C11\uFF0C\u4E00\u4E2A\u5927\u90E8\u95E8\u5C31\u4E00\u4E24\u4E2A\u540D\u989D\u3002\u9664\u84DD\u5251\u8BA1\u5212\u5916\uFF0C\u5176\u5B83\u7B49\u7EA7\u7684 offer \u6708\u85AA\u5728 10-15k \u4E4B\u95F4\uFF0C\u6BCF\u5E74 14 \u85AA\u6216 15 \u85AA\u3002</p><p><strong>\u79FB\u52A8</strong></p><p>\u79FB\u52A8\u897F\u5B89\u7814\u7A76\u9662\u548C\u79FB\u52A8\u96C4\u5B89\u7814\u7A76\u9662\u90FD\u5728\u897F\u5B89\uFF0C\u5BF9\uFF0C\u4F60\u6CA1\u542C\u9519\uFF0C\u96C4\u5B89\u7814\u7A76\u9662\u4E5F\u5728\u897F\u5B89\u8BBE\u70B9\u4E86\u3002\u7855\u58EB\u603B\u5305\u5927\u7EA6 16-19 \u4E07\uFF0C\u79FB\u52A8\u7684\u5DE5\u8D44\u4E00\u90E8\u5206\u4F1A\u5728\u5E74\u5E95\u6309\u5E74\u7EC8\u5956\u7684\u5F62\u5F0F\u53D1\uFF0C\u5E73\u5E38\u6BCF\u6708\u53D1\u7684\u5DE5\u8D44\u6BD4\u8F83\u5C11\u3002</p><p><strong>\u8054\u901A</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-33ac9a8b-04d3-4adb-8482-e725e25bb2f9.png" alt=""></p><p>\u897F\u5B89\u8054\u901A\u8F6F\u4EF6\u7814\u7A76\u9662\uFF0C\u5E94\u5C4A\u7855\u58EB\u7684\u603B\u5305\u548C\u79FB\u52A8\u5DEE\u4E0D\u591A\uFF0C\u5927\u7EA6 16-19 \u4E07\u3002\u4E0D\u8FC7\u8054\u901A\u6BD4\u8F83\u6E05\u95F2\uFF0C\u5927\u90E8\u5206\u90E8\u95E8\u90FD\u80FD\u4E0B\u5348\u516D\u70B9\u5C31\u4E0B\u73ED\u3002\u76EE\u524D\u5728\u7F51\u4E0A\u7684\u8BC4\u4EF7\u76F8\u5BF9\u597D\u4E00\u4E9B\u3002</p><p><strong>\u5927\u5510</strong></p><p>\u5927\u5510\u7684\u52A0\u73ED\u633A\u4E25\u91CD\u7684\uFF0C\u5468\u5185\u9700\u8981\u6709\u4E09\u5929\u52A0\u73ED\u5230\u4E5D\u70B9\u3002\u5468\u672B\u9700\u8981\u52A0\u591F 8 \u4E2A\u5C0F\u65F6\u7684\u73ED\u3002</p><p><strong>\u70FD\u706B\u661F\u7A7A</strong></p><p>\u5F53\u65F6\u6765\u5B66\u6821\u6821\u62DB\u65F6\uFF0C\u8BF4\u5DE5\u8D44\u4F1A\u5728 10-20k \u4E4B\u95F4\uFF0C\u6839\u636E\u9762\u8BD5\u8868\u73B0\u8FDB\u884C\u5DE5\u8D44\u8BC4\u5B9A\u3002\u6700\u8FD1\u5728\u542C\u8BF4\u52A0\u73ED\u6BD4\u8F83\u4E25\u91CD\u3002</p><p><strong>\u592A\u6781\u96C6\u56E2</strong></p><p>\u6700\u521D 12306 \u4E3B\u8981\u5C31\u662F\u592A\u6781\u5F00\u53D1\u7684 \uFF0C\u521A\u642C\u6765\u897F\u5B89\u4E0D\u4E45\uFF0C\u7855\u58EB\u5DE5\u8D44\u6C34\u5E73\u662F\u5230\u624B 7-8k \u6BCF\u6708\uFF0C\u6BCF\u5E74 13 \u85AA\u3002\u5DE5\u4F5C\u7A33\u5B9A\u3002\u51FA\u5DEE\u591A\uFF0C\u52A0\u4E0A\u51FA\u5DEE\u8865\u52A9\u7684\u8BDD\u6BCF\u4E2A\u6708\u6536\u5165\u8FD8\u53EF\u4EE5\u3002</p><p><strong>\u8363\u8000</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-19d21a8f-6a45-408a-9f0f-ae8dd40bdbb1.png" alt=""></p><p>\u8363\u8000\u76EE\u524D\u7684\u62DB\u4EBA\u9700\u6C42\u662F\u5F88\u5927\u7684\uFF0C\u5DE5\u4F5C\u5F3A\u5EA6\u672A\u77E5\uFF0C\u85AA\u8D44\u6C34\u5E73\u76EE\u524D\u662F\u5B8C\u5168\u5BF9\u6807\u534E\u4E3A\u7684\u3002</p><p><strong>\u5357\u745E</strong></p><p>\u5357\u745E\u662F\u56FD\u5BB6\u7535\u7F51\u7684\u6280\u672F\u578B\u7814\u7A76\u9662\uFF0C\u76EE\u524D\u7684\u9879\u76EE\u4E5F\u57FA\u672C\u90FD\u662F\u56F4\u7ED5\u7535\u529B\u884C\u4E1A\u7684\u3002\u5357\u745E\u7684\u6821\u62DB\u5DE5\u8D44\u4F1A\u5728\u57FA\u7840\u4E0A\u6839\u636E\u5B66\u5386\u6765\u4EF7\u94B1\u3002\u897F\u5B89\u7684\u6821\u62DB\u5DE5\u8D44\u5E74\u85AA\u4E5F\u5728 15-20w \u8FD9\u4E2A\u8303\u56F4\u5185\u3002\u5927\u90E8\u5206\u90E8\u95E8\u51FA\u5DEE\u6BD4\u8F83\u591A\u3002</p><p><strong>\u6DA6\u8054\u79D1\u6280</strong></p><p>\u5DE5\u4F5C\u7A33\u5B9A\u3001\u85AA\u8D44\u8FD8\u53EF\u4EE5\u3002\u4E0D\u8FC7\u6DA6\u8054\u79D1\u6280\u6DF1\u5733\u90A3\u8FB9\u76F8\u5BF9\u597D\u4E00\u70B9\u3002</p><h3 id="\u94F6\u884C\u8F6F\u4EF6\u5F00\u53D1\u4E2D\u5FC3" tabindex="-1"><a class="header-anchor" href="#\u94F6\u884C\u8F6F\u4EF6\u5F00\u53D1\u4E2D\u5FC3" aria-hidden="true">#</a> \u94F6\u884C\u8F6F\u4EF6\u5F00\u53D1\u4E2D\u5FC3</h3><p>\u9664\u4E86\u94F6\u884C\u8F6F\u4EF6\u5F00\u53D1\u4E2D\u5FC3\uFF0C\u5404\u7701\u5206\u884C\u7684\u79D1\u6280\u90E8\u95E8\u5927\u5BB6\u4E5F\u53EF\u4EE5\u53BB\u8003\u8651\uFF0C\u8FD9\u91CC\u5C31\u4E0D\u5C55\u5F00\u4ECB\u7ECD\u4E86\u3002\u94F6\u884C\u7684\u8F6F\u4EF6\u5F00\u53D1\u4E2D\u5FC3\u5F85\u9047\u6C34\u5E73\u662F\u4E0D\u9519\u7684\uFF0C\u4E14\u57FA\u672C\u90FD\u5C5E\u4E8E\u603B\u884C\u7F16\u5236\uFF0C\u751F\u6D3B\u7A33\u5B9A\u3002\u76EE\u524D\u5BF9\u4E8E\u51C6\u5907\u7559\u5728\u897F\u5B89\u7684\u540C\u5B66\u6765\u8BF4\uFF0C\u53BB\u94F6\u884C\u7684\u8F6F\u4EF6\u5F00\u53D1\u4E2D\u5FC3\u662F\u4E00\u4E2A\u4E0D\u9519\u7684\u9009\u62E9\u3002\u4F46\u8FD1\u5E74\u6765\u6709\u4E00\u80A1\u94F6\u884C\u8F6F\u4EF6\u5F00\u53D1\u4E2D\u5FC3\u5B50\u516C\u53F8\u5316\u7684\u6D6A\u6F6E\uFF0C\u4ECA\u540E\u7684\u7A33\u5B9A\u6027\u672A\u77E5\u3002</p><p><strong>\u519C\u884C\u8F6F\u5F00</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-cfa06bd9-abd6-455e-bd5c-aef4c90f7edb.png" alt=""></p><p>\u519C\u884C\u8F6F\u5F00\u76EE\u524D\u662F\u5728\u897F\u5B89\u5DE5\u4F5C\u7684\u6700\u597D\u7684\u51E0\u4E2A\u9009\u62E9\u4E4B\u4E00\uFF0C\u7855\u58EB\u6BCF\u6708\u5230\u624B 12k\uFF0C\u672C\u79D1\u751F\u5C11\u51E0\u767E\u5757\u94B1\uFF0C\u5E74\u7EC8\u5956 2-4 \u4E2A\u6708\u3002\u5927\u90E8\u5206\u90E8\u95E8\u90FD\u80FD\u665A\u4E0A 7 \u70B9\u4EE5\u524D\u4E0B\u73ED\uFF0C\u5E76\u4E14\u5468\u672B\u53CC\u4F11\u3002\u76EE\u524D\u519C\u884C\u8F6F\u5F00\u6709\u5B50\u516C\u53F8\u5316\u8F6F\u4EF6\u5F00\u53D1\u4E2D\u5FC3\u7684\u8BA1\u5212\uFF0C\u542C\u6D88\u606F\u8BF4\u53EF\u4EE5\u9009\u62E9\u53BB\u5B50\u516C\u53F8\uFF0C\u4E5F\u53EF\u4EE5\u7559\u5728\u8F6F\u5F00\u3002\u76EE\u524D\u897F\u5B89\u7684\u519C\u884C\u8F6F\u5F00\u4E5F\u8D8A\u6765\u8D8A\u5377\uFF0C\u5927\u90E8\u5206\u7684 offer \u90FD\u7ED9\u4E86\u897F\u7535\u3001\u897F\u4EA4\u3001\u897F\u5DE5\u5927\u8FD9\u4E09\u4E2A\u5B66\u6821\u4E86\uFF0C\u53E6\u5916\u8FD9\u4E09\u4E2A\u5B66\u6821\u7684\u5B66\u751F\u73B0\u5728\u4E5F\u4E0D\u662F\u60F3\u53BB\u519C\u884C\u5C31\u80FD\u53BB\u4E86\u3002\u519C\u884C\u8F6F\u5F00\u6709\u4E2A\u786C\u6027\u89C4\u5B9A\u662F\u5FC5\u987B\u901A\u8FC7\u516D\u7EA7\u624D\u80FD\u62A5\u3002</p><p><strong>\u5DE5\u884C\u8F6F\u5F00</strong></p><p>\u897F\u5B89\u7684\u5DE5\u884C\u8F6F\u5F00\u5C5E\u4E8E\u603B\u884C\u5E8F\u5217\u3002\u672C\u79D1\u751F\u548C\u7855\u58EB\u751F\u8FDB\u5165\u5DE5\u884C\u540E\u804C\u7EA7\u90FD\u662F\u52A9\u7406\u7ECF\u7406\uFF0C\u5E74\u85AA\u603B\u5305 20 \u4E07\u5DE6\u53F3\uFF0C\u672C\u79D1\u751F\u6BCF\u6708\u5DE5\u8D44\u5C31\u6BD4\u7855\u58EB\u751F\u5C11\u51E0\u767E\u5757\u94B1\u3002\u5DE5\u884C\u8F6F\u5F00\u6BCF\u6708\u53D1\u7684\u5DE5\u8D44\u4F1A\u5C11\u4E00\u4E9B\uFF0C\u7136\u540E\u5E74\u7EC8\u4F1A\u4E00\u4E0B\u53D1\u597D\u51E0\u4E07\u7684\u5E74\u7EC8\u5956\u3002\u672C\u79D1\u751F\u9700\u8981\u4E24\u5E74\u624D\u80FD\u5347\u7ECF\u7406\u4E00\uFF0C\u7855\u58EB\u9700\u8981\u4E00\u5E74\u5C31\u53EF\u4EE5\u5347 \u7ECF\u7406\u4E00\u3002\u5347\u5230 \u7ECF\u7406\u4E00 \u540E\u8868\u73B0\u597D\u4E00\u5E74\u5C31\u53EF\u4EE5\u5347 \u7ECF\u7406\u4E8C\uFF0C\u4E0D\u8FC7\u4ECE\u52A9\u7406\u7ECF\u7406\u5230\u7ECF\u7406\u4E8C\u7684\u85AA\u8D44\u6DA8\u5E45\u4E0D\u5927\u3002\u4ECE\u6BD5\u4E1A\u5230\u5347\u804C\u6210\u4E3A\u7ECF\u7406\u4E09\uFF08\u76F8\u5F53\u4E8E\u7EC4\u957F\uFF09\u6700\u5FEB\u9700\u8981\u4E94\u5E74\uFF0C\u7ECF\u7406\u4E09\u7684\u5E74\u85AA\u8FD8\u662F\u5F88\u53EF\u89C2\u7684\u3002</p><p>\u8BFB\u8005\u8865\u5145\uFF1A\u897F\u5B89\u5DE5\u884C\u5468\u4E00\u3001\u5468\u4E8C\u3001\u5468\u56DB\u9700\u8981\u52A0\u73ED</p><p><strong>\u4E2D\u884C\u8F6F\u5F00</strong></p><p>\u897F\u5B89\u7684\u4E2D\u56FD\u94F6\u884C\u8F6F\u4EF6\u5F00\u53D1\u4E2D\u5FC3\u7ED9\u5E94\u5C4A\u7855\u58EB\u7684\u62A5\u4EF7\u662F\u5E74\u85AA 13 \u4E07\uFF0C\u5927\u5BB6\u53EF\u4EE5\u53C2\u8003\u4E00\u4E0B\u3002</p><p>\u4E2D\u884C\u8F6F\u5F00\u7684\u6280\u672F\u9762\u8BD5\u4E00\u822C\u95EE\u7684\u6280\u672F\u95EE\u9898\u6BD4\u8F83\u5C11\uFF0C\u90FD\u662F\u6700\u57FA\u672C\u7684\u95EE\u9898\uFF0C\u6BD4\u8F83\u7B80\u5355\u3002</p><p><strong>\u6D59\u5546\u94F6\u884C</strong></p><p>\u6D59\u5546\u94F6\u884C\u5728\u94F6\u884C\u8F6F\u5F00\u4E2D\u7ED9\u7684\u5DE5\u8D44\u7B97\u591A\u7684\uFF0C\u897F\u5B89\u7855\u58EB\u7684\u5E74\u85AA\u5305\u662F 25-28 \u4E07\uFF0C\u672C\u79D1\u751F\u7684\u5E74\u5305\u662F 19-23 \u4E07\u3002\u4E5F\u7B97\u4E00\u4E2A\u8FD8\u4E0D\u9519\u7684\u9009\u62E9\u4E86\u3002</p><p><strong>\u6D66\u53D1\u94F6\u884C</strong></p><p>\u6D66\u53D1\u94F6\u884C\u5728\u897F\u5B89\u7684\u8F6F\u4EF6\u5F00\u53D1\u4E2D\u5FC3\u88AB\u5B50\u516C\u53F8\u5316\u4E86\u3002\u5DE5\u8D44\u672C\u79D1\u662F\uFF085-7k\uFF09*24\uFF0C\u7855\u58EB\u662F 7.5k *24\u3002\u8FD9\u4E2A\u5DE5\u8D44\u662F\u4EC0\u4E48\u610F\u601D\u5462\uFF0C\u5C31\u662F\u6BCF\u4E2A\u6708\u7ED9\u4F60 5-7k\uFF0C\u7136\u540E\u5E74\u5E95\u518D\u4E00\u4E0B\u5B50\u7ED9\u4F60\u53D1 12 \u4E2A\u6708\u7684\u5DE5\u8D44\u5F53\u6210\u5E74\u7EC8\u5956\u3002</p><p><strong>\u90AE\u653F\u94F6\u884C</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-946ce62c-0afc-48c8-b570-fab660d2ea13.png" alt=""></p><p>\u90AE\u50A8\u94F6\u884C\u8F6F\u4EF6\u5F00\u53D1\u4E2D\u5FC3\u5728\u897F\u5B89\u521A\u6210\u7ACB\uFF0C\u8FD8\u4E0D\u592A\u786E\u5B9A\u3002\u76EE\u524D\u5BA3\u4F20\u662F\u5E74\u5305 28 \u4E07\u4EE5\u4E0A\uFF0C\u5DE5\u4F5C\u5F3A\u5EA6\u76EE\u6D4B\u6BD4\u8F83\u5927\u3002</p><p><strong>\u4E2D\u4FE1\u5EFA\u6295</strong></p><p>\u4E2D\u4FE1\u5EFA\u6295\u521A\u843D\u5728\u897F\u5B89\u4E0D\u4E45\uFF0C\u4ECA\u5E74\u5DF2\u7ECF\u5F00\u59CB\u6821\u62DB\u4E86\u3002\u4E2D\u4FE1\u5EFA\u6295\u76EE\u524D\u5728\u897F\u5B89\u7B97\u662F\u6027\u4EF7\u6BD4\u6700\u9AD8\u7684\u51E0\u4E2A\u597D\u53BB\u5904\u4E4B\u4E00\uFF0C\u5DE5\u8D44\u6C34\u5E73\u8F83\u9AD8\uFF0C\u6BCF\u5E74\u53D118\u4E2A\u6708\u7684\u5DE5\u8D44\uFF0C\u800C\u4E14\u5927\u90E8\u5206\u90E8\u95E8\u52A0\u73ED\u4E0D\u600E\u4E48\u4E25\u91CD\u3002\u4E2D\u4FE1\u5EFA\u6295YYDS\u3002\u4E0D\u8FC7\u76EE\u524D\u4E2D\u4FE1\u5EFA\u6295\u5B66\u5386\u5361\u7684\u6BD4\u8F83\u4E25\uFF0C\u8981\u6C42\u7855\u58EB985\uFF0C\u540C\u65F6\u672C\u79D1\u8FD8\u8981\u6C42211\uFF0C\u5076\u5C14\u4F1A\u653E\u5BBD\u677E\u4E00\u70B9\u672C\u79D1\u7684\u6761\u4EF6\u3002</p><h3 id="\u5916\u4F01" tabindex="-1"><a class="header-anchor" href="#\u5916\u4F01" aria-hidden="true">#</a> \u5916\u4F01</h3><p>\u4E00\u822C\u60C5\u51B5\u4E0B\uFF0C\u5916\u4F01\u7684\u5DE5\u4F5C\u5F3A\u5EA6\u4F1A\u66F4\u5C0F\u4E00\u70B9\uFF0C\u57FA\u672C\u90FD\u662F 955 \u548C 965 \u7684\u6837\u5B50\u3002</p><p><strong>\u4E09\u661F</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-31302c7c-7dcd-4f12-b624-872b4878670d.png" alt=""></p><p>\u5927\u90E8\u5206\u5E94\u5C4A\u751F\u90FD\u662F\uFF0811-14)k *13.5k\u3002965 \u5DE5\u4F5C\u5236\u3002\u51E0\u4E4E\u90FD\u662F\u82AF\u7247\u3001\u8FD0\u7EF4\u76F8\u5173\u5C97\u4F4D\u3002</p><p>\u6709\u8BFB\u8005\u8865\u5145\uFF1A\u4E09\u661F\u5DE5\u4F5C\u5236\u5EA6\u662F855\uFF0C16\u85AA\u3002\u53EF\u4EE5\u53C2\u8003\u3002</p><p><strong>SAP</strong></p><p>SAP \u662F\u4E00\u5BB6\u505A\u4F01\u4E1A\u8F6F\u4EF6\u7684\u5FB7\u4F01\uFF0C\u6280\u672F\u5341\u5206\u5F3A\u5927\u3002\u7855\u58EB\u5E74\u85AA 20 \u4E07\u5DE6\u53F3\uFF0C\u672C\u79D1\u751F\u5E74\u85AA 15 \u4E07\u5DE6\u53F3\u3002</p><p>\u4E0D\u8FC7\uFF0C\u6211\u6709\u4E00\u4E2A\u540C\u5B66\u53BB SAP \u9762\u8BD5\u4E4B\u540E\u56DE\u6765\u8BF4\u9762\u8BD5\u4F53\u9A8C\u975E\u5E38\u5DEE\u3002</p><p>\u8BFB\u8005\u8865\u5145\uFF1A\u897F\u5B89\u73B0\u5728\u7684SAP\u662F\u539F\u6765\u7684SyBase\u897F\u5B89\u5206\u516C\u53F8\uFF0C\u7531\u4E8E\u540E\u8005\u6574\u4F53\u88AB\u524D\u8005\u6536\u8D2D\u4E86\uFF0C\u6240\u4EE5\u540E\u8005\u5728\u897F\u5B89\u7684\u5206\u516C\u53F8\u81EA\u7136\u800C\u7136\u7684\u53D8\u6210\u4E86\u524D\u8005\u7684\u5206\u516C\u53F8\uFF0C\u548C\u5317\u4EACSAP\u5206\u516C\u53F8\uFF0C\u4E0A\u6D77\u3001\u6210\u90FD\u7684\u7814\u7A76\u5458\u7684\u6587\u5316\u90FD\u4E0D\u592A\u4E00\u6837\u3002</p><p><strong>Thougtworks</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-167d941b-740e-4342-9d28-1ba753766398.png" alt=""></p><p>\u5728 Thoughtworks \u5DE5\u4F5C\u662F\u5F88\u8212\u670D\u7684\uFF0C\u5F00\u653E\u5F0F\u529E\u516C\u3001\u6241\u5E73\u5316\u7BA1\u7406\u3001\u6280\u672F\u6C1B\u56F4\u6D53\u539A\u3002\u5DE5\u8D44\u672C\u7855\u90FD\u662F 13k x 14\u3002</p><p>ThougtWorks \u7684\u65B0\u4EBA\u57F9\u517B\u673A\u5236\u8FD8\u662F\u5F88\u8D5E\u7684\uFF01\u5BF9\u4E8E\u5E94\u5C4A\u751F\u5165\u804C ThougtWorks \u7684\u8BDD\uFF0C\u5728\u4F60\u6B63\u5F0F\u4E0A\u624B\u505A\u9879\u76EE\u4E4B\u524D\u4F1A\u6709 1 \u4E2A\u6708\u5DE6\u53F3\u7684\u57F9\u8BAD\u65F6\u95F4\u3002\u793E\u62DB\u7684\u8BDD\uFF0C\u6574\u4E2A\u6D41\u7A0B\u4E00\u822C\u4F1A\u6BD4\u8F83\u7B80\u5355\u70B9\uFF0C\u76F8\u5173\u4EBA\u5458\u5E26\u4F60\u4E86\u89E3\u4E86\u516C\u53F8\u7684\u57FA\u672C\u60C5\u51B5\u540E\uFF0C\u540E\u9762\u53EF\u80FD\u5C31\u4F1A\u8BA9\u4F60\u5F00\u59CB\u4E0A\u624B\u505A\u9879\u76EE\u4E86\u3002</p><p><strong>\u5176\u4ED6</strong></p><p>\u542C\u8BF4\u6C47\u4E30\u548C\u7231\u7ACB\u4FE1\u5728\u897F\u5B89\u4E5F\u6709\u8F6F\u4EF6\u5F00\u53D1\u4E2D\u5FC3\uFF0C\u5927\u5BB6\u611F\u5174\u8DA3\u53EF\u4EE5\u81EA\u884C\u53BB\u4E86\u89E3\u3002</p><p>\u8BFB\u8005\u8865\u5145\uFF1A\u7231\u7ACB\u4FE1\u5728\u897F\u5B89\u7684\u4E0D\u662F\u7814\u53D1\u4E2D\u5FC3\uFF08\u5176\u7814\u53D1\u5728\u4E0A\u6D77\u3001\u6210\u90FD\uFF0C\u5317\u4EAC\u4E5F\u6709\u4F46\u662F\u5C0F\uFF0C\u786C\u4EF6\u7814\u53D1\u5728\u5357\u4EAC\uFF09\uFF0C\u800C\u662F\u8FD0\u7EF4\u548C\u4EA4\u4ED8\u4E2D\u5FC3\u3002</p><p>\u8BFB\u8005\u8865\u5145\uFF1A\u6C47\u4E30\u5728\u897F\u5B89\u7684\u4E0D\u662F\u6C47\u4E30\u603B\u516C\u53F8\u7684\u8F6F\u5F00\uFF0C\u800C\u662F\u6536\u8D2D\u7684\u7684\u4E00\u5BB6\u5B50\u516C\u53F8\uFF0C\u4E5F\u662F\u5BB6\u94F6\u884C\u7684\u8F6F\u5F00\uFF0C\u4F46\u662F\u5F85\u9047\u4E5F\u4E0D\u5DEE\uFF0C\u6709\u5728\u62DB\u5F00\u53D1\u548C\u6D4B\u8BD5\u3002</p><h3 id="\u7814\u7A76\u6240" tabindex="-1"><a class="header-anchor" href="#\u7814\u7A76\u6240" aria-hidden="true">#</a> \u7814\u7A76\u6240</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-872dc3ff-316d-4194-b549-f998b39feedf.png" alt=""></p><p>\u897F\u5B89\u822A\u7A7A\u822A\u5929\u7C7B\u7684\u7814\u7A76\u6240\u7279\u522B\u591A\uFF0C\u6211\u77E5\u9053\u7684\u62DB\u8BA1\u7B97\u673A\u65B9\u9762\u7684\u7814\u7A76\u6240\u6709\u822A\u5929 504 \u6240\u3001771 \u6240\uFF0C\u822A\u7A7A 631 \u6240\u3001618 \u6240\u3001603 \u6240\uFF0C\u4E2D\u7535 20 \u6240\u300139 \u6240\uFF0C\u5175\u5668\u5DE5\u4E1A 203 \u6240\u3001204 \u6240\u3001205 \u6240\u3002</p><p>\u8FD9\u4E9B\u7814\u7A76\u6240\u4E2D\uFF0C\u5F85\u9047\u6700\u597D\u7684\u662F\u822A\u5929 504 \u6240\uFF0C\u4F46\u662F\u62DB\u4EBA\u7684\u8981\u6C42\u5F88\u9AD8\uFF0C\u76EE\u524D\u6821\u62DB\u8FDB\u53BB\u7684\u5927\u90E8\u5206\u662F\u535A\u58EB\uFF0C\u53CC 985 \u7855\u58EB\uFF08\u5C31\u662F\u672C\u79D1\u548C\u7814\u7A76\u751F\u90FD\u6BD5\u4E1A\u4E8E 985 \u9AD8\u6821\uFF09\u60F3\u8FDB\u90FD\u5F88\u96BE\u3002\u5176\u6B21 618 \u6240\u548C\u5175\u5668\u5DE5\u4E1A\u7684\u7814\u7A76\u6240\u5F85\u9047\u8FD8\u4E0D\u9519\uFF0C\u8FD9\u51E0\u4E2A\u7814\u7A76\u6240\u62DB\u8058\u6709\u4E00\u4E2A\u9690\u5F62\u7684\u8981\u6C42\u5C31\u662F\u53CC 985 \u7855\u58EB\u3002\u5176\u5B83\u6240\u7684\u6027\u4EF7\u6BD4\u5C31\u6BD4\u8F83\u5DEE\u4E86\u3002631 \u6240\u66FE\u7ECF\u88AB\u8A89\u4E3A\u897F\u5317\u7B2C\u4E00\u795E\u6240\uFF0C\u4F46\u76EE\u524D\u7684\u6548\u76CA\u4E5F\u4E0D\u884C\u4E86\uFF0C\u73B0\u5728\u7684\u5F85\u9047\u662F\u5E74\u85AA 10 \u4E07\uFF0C\u7B2C\u4E00\u5E74\u989D\u5916\u4F1A\u7ED9 5 \u4E07\u7684\u5B89\u5BB6\u8D39\u3002</p><h3 id="\u5916\u5305" tabindex="-1"><a class="header-anchor" href="#\u5916\u5305" aria-hidden="true">#</a> \u5916\u5305</h3><p>\u897F\u5B89\u6709\u7684\u51E0\u5BB6\u6BD4\u8F83\u5927\u7684\u662F\u4E2D\u8F6F\u56FD\u9645\u3001\u8F6F\u901A\u52A8\u529B\u548C\u6587\u601D\u6D77\u8F89\u3002\u4E2D\u8F6F\u56FD\u9645\u548C\u8F6F\u901A\u52A8\u529B\u4E3B\u8981\u662F\u5728\u7ED9\u534E\u4E3A\u505A\u5916\u5305\uFF0C\u5DE5\u4F5C\u5F3A\u5EA6\u51E0\u4E4E\u548C\u534E\u4E3A\u57FA\u672C\u4E00\u6837\u3002\u5916\u5305\u7684\u6027\u4EF7\u6BD4\u4E0D\u592A\u9AD8\u54C8\u3002</p><h2 id="\u751F\u6D3B" tabindex="-1"><a class="header-anchor" href="#\u751F\u6D3B" aria-hidden="true">#</a> \u751F\u6D3B</h2><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-980c455e-1858-4c52-8c4f-5c1b0ed996b4.png" alt=""></p><p>\u9655\u897F\u7684\u8D44\u6E90\u57FA\u672C\u90FD\u96C6\u4E2D\u5728\u897F\u5B89\uFF0C\u4ECE\u4EBA\u53E3\u4E0A\u4E5F\u80FD\u770B\u51FA\u897F\u5B89\u7684\u8D44\u6E90\u6709\u591A\u96C6\u4E2D\u3002\u6574\u4E2A\u9655\u897F\u4E09\u5343\u591A\u4E07\u4EBA\uFF0C\u5728\u897F\u5B89\u5C31\u6709\u4E00\u5343\u591A\u4E07\u3002\u5E76\u4E14\u8FD9\u4E9B\u5E74\u4E2D\u592E\u5BF9\u897F\u5B89\u7684\u6276\u690D\u529B\u5EA6\u8D8A\u6765\u8D8A\u5927\u3002</p><h3 id="\u623F\u4EF7" tabindex="-1"><a class="header-anchor" href="#\u623F\u4EF7" aria-hidden="true">#</a> \u623F\u4EF7</h3><p>\u897F\u5B89\u7684\u623F\u4EF7\u4ECE 18 \u5E74\u5230\u73B0\u5728\u7FFB\u4E86\u4E00\u500D\uFF0C\u4F46\u5C31\u76EE\u524D\u7684\u623F\u4EF7\u76F8\u8F83\u4E8E\u5176\u5B83\u540C\u7C7B\u578B\u57CE\u5E02\u7B97\u662F\u6BD4\u8F83\u53CB\u597D\u7684\u3002\u73B0\u5728\u897F\u5B89\u7684\u623F\u4EF7\u6700\u8D35\u7684\u5728\u66F2\u6C5F\u3001\u7B2C\u4E8C\u8D35\u662F\u9AD8\u65B0\u533A\u3002\u5176\u5B83\u5730\u65B9\u7684\u623F\u4EF7\u5DEE\u4E0D\u591A\u4E00\u4E07\u516D\u5DE6\u53F3\u5427\uFF0C\u4E0D\u8FC7\u4ECA\u5E74\u7684\u5168\u8FD0\u4F1A\u8FC7\u540E\u53EF\u80FD\u4F1A\u957F\u4E00\u6CE2\u3002\u6309\u7167\u7A0B\u5E8F\u5458\u7684\u5DE5\u8D44\u6765\u8BF4\uFF0C\u5728\u897F\u5B89\u4E70\u623F\u7684\u95EE\u9898\u4E0D\u7B97\u5F88\u5927\uFF0C\u8FD9\u4E5F\u662F\u7A0B\u5E8F\u5458\u5F85\u5728\u897F\u5B89\u6BD4\u8F83\u8212\u670D\u7684\u5730\u65B9\u3002\u5BF9\u4E8E\u7A0B\u5E8F\u5458\u6765\u8BF4\uFF0C\u79DF\u623F\u7684\u538B\u529B\u76F8\u5BF9\u8F83\u5C0F\uFF0C\u6211\u540C\u5B66\u6709\u5728\u519C\u884C\u8F6F\u5F00\u5DE5\u4F5C\u7684\uFF0C\u5728\u9644\u8FD1\u79DF\u4E86\u4E00\u4E2A\u4E00\u5C45\u5BA4\u7684\u5F00\u95F4\u56DB\u5341\u5E73\u5DE6\u53F3\uFF0C\u4E00\u4E2A\u6708\u4E00\u5343\u4E94\uFF0C\u4E0A\u73ED\u6B65\u884C\u7528\u4E0D\u4E86\u5341\u5206\u949F\u3002\u9AD8\u65B0\u90A3\u8FB9\u79DF\u623F\u8D35\u4E00\u4E9B\uFF0C\u4F60\u613F\u610F\u5408\u79DF\u7684\u8BDD\u538B\u529B\u4E5F\u4E0D\u5927\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-b905fada-e4a5-4a0a-a704-cbf9f310be6c.png" alt=""></p><p>\u897F\u5B89\u4F4F\u5EFA\u524D\u6BB5\u65F6\u95F4\u51FA\u4E86\u4E8C\u624B\u623F\u4EA4\u6613\u53C2\u8003\u4EF7\u683C\uFF0C\u6211\u8D34\u5728\u4E0B\u9762\u5927\u5BB6\u53EF\u4EE5\u53C2\u8003\u4E0B\uFF0C\u4E0D\u8FC7\u8FD9\u4E2A\u4EF7\u683C\u611F\u89C9\u4F4E\u4E8E\u5E02\u573A\u4EF7\u4E86\u3002\u6211\u611F\u89C9\u8FD9\u76F4\u63A5\u6253\u4E86\u4E2A\u516B\u6298~\u897F\u5B89\u4F4F\u5EFA\u53D1\u5E03\u4E8C\u624B\u623F\u4EA4\u6613\u53C2\u8003\u4EF7\u683C\u7684\u94FE\u63A5\u5728\u8FD9\u91CC https://mp.weixin.qq.com/s/Gis7kIJklWygTseztydDaw</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-c22be12f-8426-487d-b256-96d7e8950762.png" alt="image-20210720212848036"></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-fb06e9b2-ba0b-46d3-b84a-5449a77dc6ae.png" alt="image-20210720212821035"></p><h3 id="\u6559\u80B2\u8D44\u6E90" tabindex="-1"><a class="header-anchor" href="#\u6559\u80B2\u8D44\u6E90" aria-hidden="true">#</a> \u6559\u80B2\u8D44\u6E90</h3><p>\u897F\u5B89\u7684\u6559\u80B2\u8D44\u6E90\u5F88\u597D\u3002\u9AD8\u4E2D\u6559\u80B2\u8D44\u6E90\u65B9\u9762\uFF0C\u897F\u5B89\u7684\u540D\u6821\u4F17\u591A\u3002\u897F\u5DE5\u5927\u9644\u4E2D\u3001\u897F\u5B89\u94C1\u4E00\u4E2D\u3001\u9AD8\u65B0\u4E00\u4E2D\u3001\u4EA4\u5927\u9644\u4E2D\u3001\u9655\u5E08\u5927\u9644\u4E2D\u8FD9\u4E9B\u5B66\u6821\u5728\u5168\u56FD\u90FD\u662F\u5F88\u6709\u540D\u7684\uFF0C\u53E6\u5916\u8FD8\u6709\u4E00\u6279\u5728\u9655\u897F\u7701\u5F88\u6709\u540D\u7684\u9AD8\u4E2D\u4E5F\u5F88\u4E0D\u9519\u3002\u5927\u5B66\u6559\u80B2\u8D44\u6E90\u65B9\u9762\uFF0C\u6574\u4E2A\u9655\u897F\u6709\u4E09\u6240 985\uFF0C\u897F\u5DE5\u5927\u548C\u897F\u5B89\u4EA4\u5927\u90FD\u5728\u897F\u5B89\uFF0C\u897F\u5317\u519C\u6797\u79D1\u6280\u5927\u5B66\u5C31\u5728\u79BB\u897F\u5B89\u4E0D\u8FDC\u7684\u6768\u51CC\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-d905fc96-b354-45fa-b6aa-cfb4e2171eb7.png" alt=""></p><p>\u53E6\u5916\uFF0C\u8FD8\u6709\u50CF\u897F\u5B89\u7535\u5B50\u79D1\u6280\u5927\u5B66\u3001\u897F\u5317\u5927\u5B66\u3001\u9655\u897F\u5E08\u8303\u5927\u5B66\u3001\u957F\u5B89\u5927\u5B66\u3001\u7B2C\u56DB\u519B\u533B\u5927\u5B66\u8FD9\u4E9B\u4E0D\u9519\u7684 211\uFF0C\u8FD8\u6709\u50CF\u897F\u5B89\u90AE\u7535\u3001\u897F\u5B89\u7406\u5DE5\u3001\u897F\u5B89\u79D1\u6280\u5927\u5B66\u3001\u897F\u5B89\u5DE5\u4E1A\u5927\u5B66\u7B49\u7B49\u8FD9\u4E9B\u4E0D\u9519\u7684\u53CC\u975E\u9662\u6821\u3002\u897F\u5B89\u6BCF\u5E74\u4EA7\u51FA\u7684\u4EBA\u624D\u7684\u6570\u91CF\u662F\u5F88\u5E9E\u5927\u7684\u3002\u8FD9\u662F\u5F88\u503C\u5F97\u897F\u5B89\u81EA\u8C6A\u7684\u4E00\u70B9\uFF0C\u4F46\u662F\u8FD9\u4E5F\u9020\u6210\u4E86\u4E00\u4E2A\u95EE\u9898\uFF0C\u897F\u5B89\u5C31\u4E1A\u5341\u5206\u7684\u5185\u5377\u3002\u6709\u4E00\u4E2A\u73B0\u8C61\u662F\u9655\u897F\u4EBA\u90FD\u613F\u610F\u5728\u897F\u5B89\uFF0C\u4E0D\u613F\u610F\u51FA\u6765\uFF0C\u8BA1\u7B97\u53BB\u5916\u9762\u4E0A\u5B66\u7684\u9655\u897F\u4EBA\u6BD5\u4E1A\u4E5F\u5927\u90E8\u5206\u90FD\u56DE\u5230\u4E86\u897F\u5B89\uFF0C\u53E6\u5916\u5728\u897F\u5B89\u4E0A\u8FC7\u5B66\u7684\u4E5F\u5927\u90E8\u5206\u7559\u5728\u4E86\u897F\u5B89\u3002\u897F\u5B89\u7684\u51E0\u4E2A\u6548\u76CA\u6BD4\u8F83\u597D\u7684\u7814\u7A76\u6240\u3001\u94F6\u884C\u8F6F\u5F00\u7684\u5E94\u8058\u96BE\u5EA6\u6BD4\u5728\u5317\u4EAC\u7684\u540C\u7EA7\u522B\u5355\u4F4D\u90FD\u96BE\u5F88\u591A\u3002\u5185\u5377\u4E0D\u4EC5\u8868\u73B0\u5728\u8BA1\u7B97\u673A\uFF0C\u8BA1\u7B97\u673A\u7B97\u597D\u7684\uFF0C\u6211\u4E86\u89E3\u5230\u76EE\u524D\u597D\u591A\u897F\u5B89\u7684\u5C0F\u5B66\u8001\u5E08\u90FD\u6562\u53EA\u8981 211 \u4EE5\u4E0A\u6BD5\u4E1A\u7684\u7855\u58EB\u751F\u3002</p><h3 id="\u533B\u7597\u8D44\u6E90" tabindex="-1"><a class="header-anchor" href="#\u533B\u7597\u8D44\u6E90" aria-hidden="true">#</a> \u533B\u7597\u8D44\u6E90</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-e6f524ec-e353-48c2-b89a-cd2ca6373924.png" alt=""></p><p>\u533B\u7597\u8D44\u6E90\u65B9\u9762\u897F\u5B89\u4E5F\u5F88\u7ED9\u529B\uFF0C\u4EA4\u5927\u4E00\u9644\u9662\u3001\u4EA4\u5927\u4E8C\u9644\u9662\u3001\u5510\u90FD\u533B\u9662\u3001\u897F\u4EAC\u533B\u9662\u3001\u7EA2\u4F1A\u533B\u9662\u90FD\u662F\u653E\u5728\u5168\u56FD\u90FD\u5F88\u5F3A\u7684\uFF0C\u53E6\u5916\u5176\u4ED6\u4E00\u6279\u7701\u5185\u6BD4\u8F83\u6709\u540D\u7684\u533B\u9662\u4E5F\u5F88\u4E0D\u9519\u3002</p><h3 id="\u4EA4\u901A" tabindex="-1"><a class="header-anchor" href="#\u4EA4\u901A" aria-hidden="true">#</a> \u4EA4\u901A</h3><p>\u897F\u5B89\u7684\u4EA4\u901A\u65B9\u9762\u4E0D\u6562\u606D\u7EF4\uFF0C\u5835\u8F66\u90A3\u662F\u4E00\u7EDD\uFF0C\u6211\u7684\u611F\u89C9\u662F\u897F\u5B89\u6BD4\u5317\u4EAC\u90FD\u8981\u5835\u3002\u897F\u5B89\u7684\u5730\u94C1 21 \u5E74\u521D\u65B0\u5F00\u4E86 3 \u6761\u7EBF\u8DEF\uFF0C\u76EE\u524D\u5171\u6709 8 \u6761\u7EBF\u8DEF\u624D\u52C9\u5F3A\u591F\u7684\u4E0A\u9700\u6C42\u3002\u6BCF\u9022\u6CD5\u5B9A\u8282\u5047\u65E5\uFF0C\u65C5\u6E38\u7684\u4EBA\u90FD\u4F1A\u628A\u897F\u5B89\u6324\u70B8\u3002\u8BF4\u5230\u65C5\u6E38\uFF0C\u8FD1\u5E74\u6765\u897F\u5B89\u5BF9\u6E38\u5BA2\u7684\u5438\u5F15\u529B\u662F\u8D8A\u6765\u8D8A\u5927\uFF0C\u4E00\u65B9\u9762\u897F\u5B89\u5728\u5F18\u626C\u5927\u5510\u6587\u5316\uFF0C\u53E6\u4E00\u65B9\u9762\u897F\u5B89\u7684\u7F8E\u98DF\u4E5F\u53EB\u4E00\u4E2A\u7F8E\u6EF4\u5F88\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-e3de7963-bfcf-4b37-9306-ff9939202208.png" alt=""></p><p>\u53E6\u5916\uFF0C\u5927\u5510\u4E0D\u591C\u57CE\u8FD9\u91CC\u7684\u4EBA\u662F\u771F\u7684\u591A\uFF0C\u5C24\u5176\u662F\u590F\u5929\uFF0C\u665A\u4E0A\u7684\u65F6\u5019\u57FA\u672C\u6253\u4E0D\u5230\u8F66\uFF01</p><h3 id="\u6C14\u5019" tabindex="-1"><a class="header-anchor" href="#\u6C14\u5019" aria-hidden="true">#</a> \u6C14\u5019</h3><p>\u6C14\u5019\u65B9\u9762\uFF0C\u897F\u5B89\u4ECE 5 \u6708\u521D\u5F00\u59CB\u5C31\u5F00\u542F\u9AD8\u6E29\u6A21\u5F0F\uFF0C\u4E00\u76F4\u5EF6\u7EED\u5230 10 \u6708\u4E2D\u65EC\u3002\u6211\u7B2C\u4E00\u6B21\u53BB\u897F\u5B89\u65F6\u662F 8 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diff --git a/dist/assets/xian.html.badb133a.js b/dist/assets/xian.html.badb133a.js
new file mode 100644
index 00000000..df19d9dc
--- /dev/null
+++ b/dist/assets/xian.html.badb133a.js
@@ -0,0 +1 @@
+const e={key:"v-55b57168",path:"/cityselect/xian.html",title:"\u897F\u5B89\u90FD\u6709\u54EA\u4E9B\u503C\u5F97\u52A0\u5165\u7684IT\u4E92\u8054\u7F51\u516C\u53F8\uFF1F",lang:"zh-CN",frontmatter:{shortTitle:"\u897F\u5B89",category:["\u6C42\u804C\u9762\u8BD5"],tag:["\u57CE\u5E02\u9009\u62E9"],summary:"\u897F\u5B89\u90FD\u6709\u54EA\u4E9B\u503C\u5F97\u52A0\u5165\u7684IT\u4E92\u8054\u7F51\u516C\u53F8\uFF1F 2019 \u5E74\u56FD\u5E86\u8282\u7684\u65F6\u5019\u53BB\u4E86\u4E00\u8D9F\u897F\u5B89\uFF0C\u548C\u670B\u53CB\u4E00\u8D77\uFF0C\u5F00\u8F66\u53BB\u7684\uFF0C\u5927\u6982 4 \u4E2A\u591A\u5C0F\u65F6\u7684\u8F66\u7A0B\uFF0C\u4ECE\u6D1B\u9633\u5230\u897F\u5B89\uFF0C\u4E0D\u7B97\u592A\u8FDC\u3002 \u4EE4\u6211\u5370\u8C61\u6700\u6DF1\u523B\u7684\u5C31\u662F\uFF0C\u5728\u57CE\u5899\u4E0B\u9762\u7684\u4E52\u4E53\u7403\u573A\u4E0A\u9047\u5230\u4E86\u4E00\u4E2A\u5927\u53D4\uFF0C\u4ED6\u8BF4\u81EA\u5DF1\u66FE\u7ECF\u662F\u897F\u5B89\u5E02\u957F\u7684\u53F8\u673A\uFF0C\u5149\u81EA\u5DF1\u5BB6\u91CC\u5C31 8 \u5957\u623F\uFF0C\u7236\u6BCD\u90A3\u8FB9\u8FD8\u4E00\u4E9B\u3002\u8BB0\u5F97\u5F53\u65F6\u8FD8\u53D1\u4E86\u4E00\u4E2A\u7968\u5708\uFF0C\u5BB6\u91CC\u53EA\u6709\u4E00\u4E2A\u5973\u513F \u5927\u53D4\u7A7F\u7740\u5F88\u968F\u610F\uFF0C\u8BF4\u8BDD\u4E5F\u975E\u5E38\u548C\u853C\uFF0C\u5B8C\u5168",head:[["meta",{property:"og:url",content:"https://tobebetterjavaer.com/cityselect/xian.html"}],["meta",{property:"og:site_name",content:"Java \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF"}],["meta",{property:"og:title",content:"\u897F\u5B89\u90FD\u6709\u54EA\u4E9B\u503C\u5F97\u52A0\u5165\u7684IT\u4E92\u8054\u7F51\u516C\u53F8\uFF1F"}],["meta",{property:"og:type",content:"article"}],["meta",{property:"og:updated_time",content:"2022-06-11T12:15:48.000Z"}],["meta",{property:"og:locale",content:"zh-CN"}],["meta",{property:"article:tag",content:"\u57CE\u5E02\u9009\u62E9"}],["meta",{property:"article:modified_time",content:"2022-06-11T12:15:48.000Z"}]]},excerpt:"",headers:[{level:2,title:"\u5DE5\u4F5C\u673A\u4F1A",slug:"\u5DE5\u4F5C\u673A\u4F1A",children:[{level:3,title:"\u4E92\u8054\u7F51",slug:"\u4E92\u8054\u7F51",children:[]},{level:3,title:"\u56FD\u4F01",slug:"\u56FD\u4F01",children:[]},{level:3,title:"\u94F6\u884C\u8F6F\u4EF6\u5F00\u53D1\u4E2D\u5FC3",slug:"\u94F6\u884C\u8F6F\u4EF6\u5F00\u53D1\u4E2D\u5FC3",children:[]},{level:3,title:"\u5916\u4F01",slug:"\u5916\u4F01",children:[]},{level:3,title:"\u7814\u7A76\u6240",slug:"\u7814\u7A76\u6240",children:[]},{level:3,title:"\u5916\u5305",slug:"\u5916\u5305",children:[]}]},{level:2,title:"\u751F\u6D3B",slug:"\u751F\u6D3B",children:[{level:3,title:"\u623F\u4EF7",slug:"\u623F\u4EF7",children:[]},{level:3,title:"\u6559\u80B2\u8D44\u6E90",slug:"\u6559\u80B2\u8D44\u6E90",children:[]},{level:3,title:"\u533B\u7597\u8D44\u6E90",slug:"\u533B\u7597\u8D44\u6E90",children:[]},{level:3,title:"\u4EA4\u901A",slug:"\u4EA4\u901A",children:[]},{level:3,title:"\u6C14\u5019",slug:"\u6C14\u5019",children:[]}]},{level:2,title:"\u505A\u4E2A\u603B\u7ED3",slug:"\u505A\u4E2A\u603B\u7ED3",children:[]}],git:{createdTime:164837021e4,updatedTime:1654949748e3,contributors:[{name:"itwanger",email:"www.qing_gee@163.com",commits:4},{name:"\u6C89\u9ED8\u738B\u4E8C",email:"www.qing_gee@163.com",commits:1}]},readingTime:{minutes:21.3,words:6390},filePathRelative:"cityselect/xian.md"};export{e as data};
diff --git a/dist/assets/xuebeng-chuantou-jichuan.html.37293204.js b/dist/assets/xuebeng-chuantou-jichuan.html.ffa86b85.js
similarity index 99%
rename from dist/assets/xuebeng-chuantou-jichuan.html.37293204.js
rename to dist/assets/xuebeng-chuantou-jichuan.html.ffa86b85.js
index 2e581e90..e19a56e0 100644
--- a/dist/assets/xuebeng-chuantou-jichuan.html.37293204.js
+++ b/dist/assets/xuebeng-chuantou-jichuan.html.ffa86b85.js
@@ -1 +1 @@
-import{_ as h}from"./plugin-vue_export-helper.21dcd24c.js";import{r as i,o as d,c as p,a as e,b as n,e as t,d as a}from"./app.a0271b9c.js";const s={},o=t('<h1 id="\u7B80\u5355\u804A\u804A\u7F13\u5B58\u96EA\u5D29\u3001\u7A7F\u900F\u3001\u51FB\u7A7F" tabindex="-1"><a class="header-anchor" href="#\u7B80\u5355\u804A\u804A\u7F13\u5B58\u96EA\u5D29\u3001\u7A7F\u900F\u3001\u51FB\u7A7F" aria-hidden="true">#</a> \u7B80\u5355\u804A\u804A\u7F13\u5B58\u96EA\u5D29\u3001\u7A7F\u900F\u3001\u51FB\u7A7F</h1><p>\u5927\u5BB6\u597D\uFF0C\u6211\u662F\u4E8C\u54E5\u5440\u3002\u4F5C\u4E3A\u540E\u7AEF\u5F00\u53D1\uFF0C\u6211\u60F3\u7F13\u5B58\u662F\u5927\u5BB6\u518D\u719F\u6089\u4E0D\u8FC7\u7684\u4E1C\u897F\u4E86\u3002</p><p>\u672C\u6587\u4F1A\u4ECB\u7ECD<strong>\u51FA\u73B0\u7F13\u5B58\u96EA\u5D29\u3001\u7A7F\u900F\u548C\u51FB\u7A7F\u7684\u4E1A\u52A1\u80CC\u666F\u3001\u89E3\u51B3\u65B9\u6848\u548C\u5BF9\u4E1A\u52A1\u53EF\u9760\u6027\u5904\u7406</strong>\u3002\u4E8B\u5148\u8BF4\u660E\uFF0C\u6700\u4F73\u89E3\u51B3\u65B9\u6848\u4E00\u5B9A\u9700\u8981\u7ED3\u5408\u5B9E\u9645\u4E1A\u52A1\u8C03\u6574\uFF0C\u4E0D\u540C\u4E1A\u52A1\u7684\u5904\u7406\u4E0D\u5B8C\u5168\u76F8\u540C</p><p>\u5176\u5B9E\u6211\u5728\u7F51\u4E0A\u4E5F\u770B\u8FC7\u4E0D\u5C11\u5173\u4E8E\u7F13\u5B58\u96EA\u5D29\u3001\u7A7F\u900F\u3001\u51FB\u7A7F\u4ECB\u7ECD\uFF0C\u4E0D\u77E5\u9053\u662F\u4E0D\u662F\u5927\u5BB6\u6240\u505A\u4E1A\u52A1\u7684\u4E0D\u540C\uFF0C\u53D1\u73B0\u6709\u4E0D\u5C11\u5C0F\u4F19\u4F34\u6709\u4EE5\u4E0B\u7591\u95EE\uFF0C\u6BD4\u5982\uFF1A</p><ul><li>\u52A0\u968F\u673A\u65F6\u95F4\u8FC7\u671F\u540E\uFF0C\u5982\u679C\u8BBF\u95EE\u65F6\u95F4\u521A\u597D\u5C31\u662F\u52A0\u4E86\u968F\u673A\u65F6\u95F4\u540E\u7684\u6570\u636E\uFF0C\u8FD9\u6837\u5C82\u4E0D\u662F\u767D\u52A0\u4E86\u968F\u673A\u65F6\u95F4\uFF1F</li><li>\u70ED\u70B9\u6570\u636E\u4E0D\u8FC7\u671F\uFF0C\u90A3\u5C82\u4E0D\u662F\u6709\u8D8A\u6765\u8D8A\u591A\u7684\u810F\u6570\u636E\uFF1F</li></ul><p>\u5C31\u4EE5\u4E0A\u95EE\u9898\uFF0C\u6211\u90FD\u4F1A\u5728\u6587\u4E2D\u4E00\u4E00\u89E3\u91CA\uFF0C\u4EE5\u4E0B\u8BF4\u7684\u7F13\u5B58\u90FD\u6307 Redis\u3002</p><p>\u6211\u4E89\u53D6\u628A\u8FD9\u4E00\u9AD8\u9891\u9762\u8BD5\u9898\u8BB2\u660E\u767D\uFF0C\u5982\u679C\u5927\u5BB6\u770B\u540E\u80FD\u5728\u8FD9\u5757\u5185\u5BB9\u548C\u9762\u8BD5\u5B98\u9762\u524D\u8C08\u7B11\u98CE\u751F\uFF0C\u90A3\u4F60\u5C31\u662F\u6700\u9753\u7684\u4ED4\u3002</p><p>\u4E0B\u9762\uFF0C\u6211\u5C31\u5F00\u59CB\u8FDB\u5165\u6B63\u9898\u5566\u3002</p><h2 id="_1-\u7F13\u5B58\u96EA\u5D29" tabindex="-1"><a class="header-anchor" href="#_1-\u7F13\u5B58\u96EA\u5D29" aria-hidden="true">#</a> 1. \u7F13\u5B58\u96EA\u5D29</h2><p>\u5373\u7F13\u5B58\u540C\u4E00\u65F6\u95F4\u5927\u9762\u79EF\u7684\u5931\u6548\uFF0C\u8FD9\u4E2A\u65F6\u5019\u6765\u4E86\u4E00\u5927\u6CE2\u8BF7\u6C42\uFF0C\u90FD\u603C\u5230\u6570\u636E\u5E93\u4E0A\uFF0C\u6700\u540E\u6570\u636E\u5E93\u5904\u7406\u4E0D\u8FC7\u6765\u5D29\u4E86\u3002</p><h3 id="_1-1-\u4E1A\u52A1\u573A\u666F\u4E3E\u4F8B" tabindex="-1"><a class="header-anchor" href="#_1-1-\u4E1A\u52A1\u573A\u666F\u4E3E\u4F8B" aria-hidden="true">#</a> 1.1 \u4E1A\u52A1\u573A\u666F\u4E3E\u4F8B</h3><p>APP \u9996\u9875\u6709\u5927\u91CF\u70ED\u70B9\u6570\u636E\uFF0C\u5728\u67D0\u5927\u578B\u6D3B\u52A8\u671F\u95F4\uFF0C\u9488\u5BF9\u4E0D\u540C\u65F6\u95F4\u6BB5\u9700\u8981\u5C55\u793A\u4E0D\u540C\u7684\u9996\u9875\u6570\u636E\u3002</p><p>\u6BD4\u5982\u5728 0 \u70B9\u65F6\u9700\u8981\u66FF\u6362\u65B0\u7684\u9996\u9875\u6570\u636E\uFF0C\u6B64\u65F6\u65E7\u9996\u9875\u6570\u636E\u8FC7\u671F\uFF0C\u65B0\u9996\u9875\u6570\u636E\u521A\u5F00\u59CB\u52A0\u8F7D\u3002</p><p>\u800C 0 \u70B9\u6B63\u5728\u6709\u4E2A\u5C0F\u6D3B\u52A8\u5F00\u59CB\uFF0C\u5927\u6279\u8BF7\u6C42\u6D8C\u5165\u3002\u56E0\u4E3A\u65B0\u6570\u636E\u521A\u5F00\u59CB\u52A0\u8F7D\uFF0C\u8BF7\u6C42\u591A\u6570\u6CA1\u6709\u547D\u4E2D\u7F13\u5B58\uFF0C\u8BF7\u6C42\u5230\u4E86\u6570\u636E\u5E93\uFF0C\u6700\u540E\u5C31\u628A\u6570\u636E\u5E93\u6253\u6302\u4E86\u3002</p><h3 id="_1-2-\u89E3\u51B3\u65B9\u6848" tabindex="-1"><a class="header-anchor" href="#_1-2-\u89E3\u51B3\u65B9\u6848" aria-hidden="true">#</a> 1.2 \u89E3\u51B3\u65B9\u6848</h3><p><strong>\u518D\u5F3A\u8C03\u4E00\u4E0B\uFF0C\u6240\u8C13\u7684\u89E3\u51B3\u65B9\u6848\u662F\u9700\u8981\u6839\u636E\u5B9E\u9645\u4E1A\u52A1\u8C03\u6574\uFF0C\u4E0D\u540C\u4E1A\u52A1\u7684\u5904\u7406\u4E0D\u5B8C\u5168\u76F8\u540C</strong></p><h4 id="_1-2-1-\u65B9\u6CD5\u4E00" tabindex="-1"><a class="header-anchor" href="#_1-2-1-\u65B9\u6CD5\u4E00" aria-hidden="true">#</a> 1.2.1 \u65B9\u6CD5\u4E00</h4><p>\u5E38\u89C1\u65B9\u5F0F\u5C31\u662F\u7ED9\u8FC7\u671F\u65F6\u95F4\u52A0\u4E2A\u968F\u673A\u65F6\u95F4\u3002</p><p>\u6CE8\u610F\u8FD9\u4E2A\u968F\u673A\u65F6\u95F4\u4E0D\u662F\u51E0\u79D2\u54C8\uFF0C\u53EF\u4EE5\u957F\u8FBE\u51E0\u5206\u949F\u3002\u56E0\u4E3A\u5982\u679C\u6570\u636E\u91CF\u5F88\u5927\uFF0C\u6309\u7167\u4E0A\u8FF0\u4F8B\u5B50\uFF0C\u52A0\u4E0A Redis \u662F\u5355\u7EBF\u7A0B\u5904\u7406\u6570\u636E\u7684\u3002\u90A3\u4E48\u51E0\u79D2\u7684\u7F13\u51B2\u4E0D\u4E00\u5B9A\u80FD\u591F\u4FDD\u8BC1\u65B0\u6570\u636E\u90FD\u88AB\u52A0\u8F7D\u5B8C\u6210\u3002</p><p>\u6240\u4EE5\u8FC7\u671F\u65F6\u95F4\u5B81\u613F\u8BBE\u7F6E\u957F\u4E00\u70B9\uFF0C\u4E5F\u597D\u8FC7\u77ED\u4E00\u70B9\u3002\u53CD\u6B63\u6700\u540E\u90FD\u662F\u4F1A\u8FC7\u671F\u6389\uFF0C\u6700\u7EC8\u6548\u679C\u662F\u4E00\u6837\u7684\u3002</p><p>\u800C\u4E14\u8FC7\u671F\u65F6\u95F4\u8303\u56F4\u52A0\u5927\uFF0Ckey \u4F1A\u66F4\u52A0\u5206\u6563\uFF0C\u8FD9\u6837\u4E5F\u662F\u4E00\u5B9A\u7A0B\u5EA6\u7F29\u77ED Redis \u5728\u8FC7\u671F key \u65F6\u5019\u7684\u963B\u585E\u65F6\u95F4\u3002</p><p>\u800C\u81F3\u4E8E\u6587\u7AE0\u5F00\u5934\u8BF4\u7684\uFF1A\u300C\u5982\u679C\u8BBF\u95EE\u65F6\u95F4\u521A\u597D\u5C31\u662F\u52A0\u4E86\u968F\u673A\u65F6\u95F4\u540E\u7684\u6570\u636E\uFF0C\u8FD9\u6837\u5C82\u4E0D\u662F\u767D\u52A0\u4E86\u968F\u673A\u65F6\u95F4\u300D\u3002</p><p>\u73B0\u5728\u4F60\u7ED3\u5408\u4E0A\u4F8B\u6D3B\u52A8\u7684\u4F8B\u5B50\uFF0C\u5B83\u8FD8\u4F1A\u662F\u4E00\u4E2A\u95EE\u9898\u5417\uFF1F\u7ED3\u5408\u4E1A\u52A1\uFF0C\u4E00\u5B9A\u8981\u7ED3\u5408\u4E1A\u52A1\u3002</p><h4 id="_1-2-2-\u65B9\u6CD5\u4E8C" tabindex="-1"><a class="header-anchor" href="#_1-2-2-\u65B9\u6CD5\u4E8C" aria-hidden="true">#</a> 1.2.2 \u65B9\u6CD5\u4E8C</h4><p>\u52A0\u4E92\u65A5\u9501\uFF0C\u4F46\u8FD9\u4E2A\u65B9\u6848\u4F1A\u5BFC\u81F4\u541E\u5410\u91CF\u660E\u663E\u4E0B\u964D\u3002\u6240\u4EE5\u8FD8\u662F\u8981\u770B\u5B9E\u9645\u4E1A\u52A1\uFF0C\u50CF\u4E0A\u8FF0\u4F8B\u5B50\u5C31\u4E0D\u5408\u9002\u7528</p><h4 id="_1-2-3-\u65B9\u6CD5\u4E09" tabindex="-1"><a class="header-anchor" href="#_1-2-3-\u65B9\u6CD5\u4E09" aria-hidden="true">#</a> 1.2.3 \u65B9\u6CD5\u4E09</h4><p>\u70ED\u70B9\u6570\u636E\u4E0D\u8BBE\u7F6E\u8FC7\u671F\u3002\u4E0D\u8FC7\u671F\u7684\u8BDD\uFF0C\u6B63\u5E38\u4E1A\u52A1\u8BF7\u6C42\u81EA\u7136\u5C31\u4E0D\u4F1A\u6253\u5230\u6570\u636E\u5E93\u4E86\u3002</p><p>\u90A3\u65B0\u7684\u95EE\u9898\u53C8\u6765\u4E86\uFF0C\u4E0D\u8FC7\u671F\u6709\u810F\u6570\u636E\uFF0C\u600E\u4E48\u529E\uFF1F</p><p>\u5F88\u7B80\u5355\uFF0C\u6D3B\u52A8\u6574\u4F53\u7ED3\u675F\u540E\u518D\u5220\u9664\u561B\u3002</p><p>\u90A3\u50CF\u4E0A\u8FF0\u4F8B\u5B50\uFF0C\u53EF\u4EE5\u600E\u4E48\u5904\u7406\u5462\uFF1F\u2014\u2014 \u9009\u62E9\u65B9\u6CD5\u4E00\uFF1B\u6216\u8005\u63D0\u524D\u628A 0 \u70B9\u9700\u8981\u7684\u65B0\u6570\u636E\u52A0\u8F7D\u8FDB Redis\uFF0C\u4E0D\u5FC5\u7B49\u5230 0 \u70B9\u624D\u53BB\u52A0\u8F7D\uFF0C\u8FD9\u6837\u4E5F\u662F\u53EF\u4EE5\u7684</p><h2 id="_2-\u7F13\u5B58\u51FB\u7A7F" tabindex="-1"><a class="header-anchor" href="#_2-\u7F13\u5B58\u51FB\u7A7F" aria-hidden="true">#</a> 2. \u7F13\u5B58\u51FB\u7A7F</h2><p>\u7F13\u5B58\u51FB\u7A7F\u662F\u6307\u4E00\u4E2A\u70ED\u70B9 key \u8FC7\u671F\u6216\u88AB\u5220\u9664\u540E\uFF0C\u5BFC\u81F4\u7EBF\u4E0A\u539F\u672C\u80FD\u547D\u4E2D\u8BE5\u70ED\u70B9 key \u7684\u8BF7\u6C42\uFF0C\u77AC\u95F4\u5927\u91CF\u5730\u6253\u5230\u6570\u636E\u5E93\u4E0A\uFF0C\u6700\u7EC8\u5BFC\u81F4\u6570\u636E\u5E93\u88AB\u51FB\u57AE\u3002</p><p>\u6709\u79CD\u5343\u91CC\u4E4B\u5824\uFF0C\u6E83\u4E8E\u8681\u7A74\u7684\u611F\u89C9\u3002</p><h3 id="_2-1-\u4E1A\u52A1\u573A\u666F\u4E3E\u4F8B" tabindex="-1"><a class="header-anchor" href="#_2-1-\u4E1A\u52A1\u573A\u666F\u4E3E\u4F8B" aria-hidden="true">#</a> 2.1 \u4E1A\u52A1\u573A\u666F\u4E3E\u4F8B</h3><p>\u51FA\u73B0\u60C5\u51B5\u4E00\u822C\u662F\u8BEF\u64CD\u4F5C\uFF0C\u6BD4\u5982\u8BBE\u7F6E\u9519\u4E86\u8FC7\u671F\u65F6\u95F4\u3001\u8BEF\u5220\u9664\u5BFC\u81F4\u7684\u3002</p><blockquote><p>\u8C01\u8FD8\u6CA1\u8BEF\u64CD\u4F5C\u8FC7\u5462\uFF0C\u5220\u5E93\u8DD1\u8DEF\u4E86\u89E3\u4E00\u4E0B\u3002\u53CD\u6B63\u6211\u8BEF\u5220\u8FC7\u6D4B\u8BD5\u5E93\u7684\u6570\u636E\uFF0C\u5E78\u597D\u4EBA\u6CA1\u4E8B\uFF0C\u72D7\u5934\u4FDD\u547D\u3002</p></blockquote><h3 id="_2-2-\u89E3\u51B3\u65B9\u6848" tabindex="-1"><a class="header-anchor" href="#_2-2-\u89E3\u51B3\u65B9\u6848" aria-hidden="true">#</a> 2.2 \u89E3\u51B3\u65B9\u6848</h3><h3 id="\u65B9\u6CD5\u4E00" tabindex="-1"><a class="header-anchor" href="#\u65B9\u6CD5\u4E00" aria-hidden="true">#</a> \u65B9\u6CD5\u4E00</h3><p>\u4EE3\u7801\u95EE\u9898\uFF0C\u8BE5 review \u7684 review\u3002</p><p>\u70ED\u70B9\u6570\u636E\u5230\u5E95\u8981\u4E0D\u8981\u8FC7\u671F\uFF0C\u4EC0\u4E48\u65F6\u5019\u8FC7\u671F\u8981\u660E\u786E</p><p>\u65E2\u7136\u662F\u70ED\u70B9\u6570\u636E\uFF0C\u5927\u6982\u7387\u662F\u6838\u5FC3\u6D41\u7A0B\u3002\u90A3\u4E48\u8BE5\u4FDD\u8BC1\u7684\u6838\u5FC3\u529F\u80FD\u8FD8\u662F\u9700\u8981\u4FDD\u8BC1\u7684\uFF0C\u51CF\u5C11\u72AF\u9519\u673A\u4F1A\u3002\u4E07\u4E00\u51FA\u95EE\u9898\uFF0C\u90A3\u5C31\u662F\u7528\u6237\u7684\u4E00\u6CE2\u8F93\u51FA\u4E86\u3002</p><h3 id="\u65B9\u6CD5\u4E8C" tabindex="-1"><a class="header-anchor" href="#\u65B9\u6CD5\u4E8C" aria-hidden="true">#</a> \u65B9\u6CD5\u4E8C</h3><p>\u7EBF\u4E0A\u8BEF\u64CD\u4F5C\u7684\u4E8B\u60C5\uFF0C\u8BE5\u52A0\u5F3A\u6743\u9650\u7BA1\u7406\u7684\u52A0\u5F3A\uFF0C\u7279\u522B\u662F\u7EBF\u4E0A\u6743\u9650\uFF0C\u4E00\u5B9A\u9700\u8981\u5BA1\u6838\uFF0C\u4EE5\u9632\u624B\u6296\u3002</p><h2 id="_3-\u7F13\u5B58\u7A7F\u900F" tabindex="-1"><a class="header-anchor" href="#_3-\u7F13\u5B58\u7A7F\u900F" aria-hidden="true">#</a> 3. \u7F13\u5B58\u7A7F\u900F</h2><p>\u7F13\u5B58\u7A7F\u900F\u662F\u6307\uFF1A\u5BA2\u6237\u7AEF\u8BF7\u6C42\u7F13\u5B58\u548C\u6570\u636E\u5E93\u4E2D\u4E0D\u5B58\u5728\u7684\u6570\u636E\uFF0C\u5BFC\u81F4\u6240\u6709\u7684\u8BF7\u6C42\u90FD\u6253\u5230\u6570\u636E\u5E93\u4E0A\u3002\u5982\u679C\u8BF7\u6C42\u5F88\u591A\uFF0C\u6570\u636E\u5E93\u4F9D\u65E7\u4F1A\u6302\u5F97\u660E\u660E\u767D\u767D\u3002</p><h3 id="_3-1-\u4E1A\u52A1\u573A\u666F\u4E3E\u4F8B" tabindex="-1"><a class="header-anchor" href="#_3-1-\u4E1A\u52A1\u573A\u666F\u4E3E\u4F8B" aria-hidden="true">#</a> 3.1 \u4E1A\u52A1\u573A\u666F\u4E3E\u4F8B</h3><ul><li>\u6570\u636E\u5E93\u4E3B\u952E id \u90FD\u662F\u6B63\u6570\uFF0C\u7136\u540E\u5BA2\u6237\u7AEF\u53D1\u8D77\u4E86 <code>id = -1</code> \u7684\u67E5\u8BE2</li><li>\u4E00\u4E2A\u67E5\u8BE2\u63A5\u53E3\uFF0C\u6709\u4E00\u4E2A\u72B6\u6001\u5B57\u6BB5 status\uFF0C\u5176\u5B9E 0 \u8868\u793A\u5F00\u59CB\u30011 \u8868\u793A\u7ED3\u675F\u3002\u7ED3\u679C\u6709\u8BF7\u6C42\u4E00\u76F4\u53D1 <code>status=3</code> \u7684\u8BF7\u6C42\u8FC7\u6765</li></ul><h3 id="_3-2-\u89E3\u51B3\u65B9\u6848" tabindex="-1"><a class="header-anchor" href="#_3-2-\u89E3\u51B3\u65B9\u6848" aria-hidden="true">#</a> 3.2 \u89E3\u51B3\u65B9\u6848</h3><h4 id="_3-2-1-\u65B9\u6CD5\u4E00" tabindex="-1"><a class="header-anchor" href="#_3-2-1-\u65B9\u6CD5\u4E00" aria-hidden="true">#</a> 3.2.1 \u65B9\u6CD5\u4E00</h4><p>\u505A\u597D\u53C2\u6570\u6821\u9A8C\uFF0C\u5BF9\u4E8E\u4E0D\u5408\u7406\u7684\u53C2\u6570\u8981\u53CA\u65F6 return \u7ED3\u675F</p><p>\u8FD9\u70B9\u975E\u5E38\u91CD\u70B9\uFF0C\u505A\u4EFB\u4F55\u4E1A\u52A1\u90FD\u4E00\u6837\uFF0C\u5BF9\u4E8E\u540E\u7AEF\u6765\u8BF4\uFF0C\u8981\u6709<strong>\u4E92\u4E0D\u4FE1\u4EFB\u539F\u5219</strong>\u3002</p><p>\u7B80\u5355\u6765\u8BF4\uFF0C\u5C31\u662F\u4E0D\u8981\u4FE1\u4EFB\u6765\u81EA\u524D\u7AEF\u3001\u5BA2\u6237\u7AEF\u548C\u4E0A\u6E38\u670D\u52A1\u7684\u8BF7\u6C42\u6570\u636E\uFF0C\u8BE5\u505A\u7684\u6821\u9A8C\u8FD8\u662F\u8981\u505A\u3002</p><p>\u56E0\u4E3A\u6211\u4EEC\u6C38\u8FDC\u90FD\u4E0D\u77E5\u9053\u7528\u6237\u4F1A\u5199\u4EC0\u4E48\u5947\u5947\u602A\u602A\u7684\u6570\u636E\uFF1B\u53C8\u6216\u8005\u5373\u4F7F\u4F60\u548C\u5BF9\u63A5\u7684\u5F00\u53D1\u7EA6\u5B9A\u597D\u4E86\u8981\u600E\u4E48\u4F20\u53C2\u6570\uFF0C\u4F46\u4F60\u4FDD\u4E0D\u51C6\u4ED6\u5C31\u6CA1\u9075\u5B88\u5462\uFF1B\u9000\u4E00\u6B65\u6765\u8BF4\uFF0C\u4E07\u4E00\u63A5\u53E3\u88AB\u7834\u89E3\u5462\u3002</p><p>\u4F60\u8981\u4FDD\u62A4\u597D\u81EA\u5DF1\uFF0C\u4E0D\u7136\u5230\u65F6\u51FA\u95EE\u9898\u65F6\uFF0C\u4F60\u548C\u8001\u5927\u8BF4\uFF0C\u56E0\u4E3A\u8C01\u8C01\u4E0D\u9075\u5B88\u7EA6\u5B9A\u4F20\u53C2\u5BFC\u81F4\uFF0C\u6216\u8005\u56E0\u4E3A\u6CA1\u60F3\u5230\u7528\u6237\u4F1A\u8FD9\u4E48\u586B\uFF0C\u4F60\u770B\u770B\u4F60\u8001\u5927\u4F1A\u8FD9\u4E48\u8BF4\uFF08\u72D7\u5934.jpg\uFF09</p><h4 id="_3-2-2-\u65B9\u6CD5\u4E8C" tabindex="-1"><a class="header-anchor" href="#_3-2-2-\u65B9\u6CD5\u4E8C" aria-hidden="true">#</a> 3.2.2 \u65B9\u6CD5\u4E8C</h4><p>\u5BF9\u4E8E\u67E5\u4E0D\u5230\u6570\u636E\u7684 key\uFF0C\u4E5F\u5C06\u5176\u77ED\u6682\u7F13\u5B58\u8D77\u6765\u3002</p><p>\u6BD4\u5982 30s\u3002\u8FD9\u6837\u80FD\u907F\u514D\u5927\u91CF\u76F8\u540C\u8BF7\u6C42\u77AC\u95F4\u6253\u5230\u6570\u636E\u5E93\u4E0A\uFF0C\u51CF\u8F7B\u538B\u529B\u3002</p><p>\u4F46\u662F\u540E\u9762\u80AF\u5B9A\u8981\u53BB\u770B\u4E3A\u4EC0\u4E48\u4F1A\u6709\u8FD9\u6837\u7684\u6570\u636E\uFF0C\u4ECE\u6839\u672C\u4E0A\u89E3\u51B3\u95EE\u9898\uFF0C\u8BE5\u65B9\u6CD5\u53EA\u662F\u7F13\u89E3\u95EE\u9898\u800C\u5DF2\u3002</p><p>\u5982\u679C\u53D1\u73B0\u5C31\u662F\u67D0\u4E9B ip \u5728\u8BF7\u6C42\uFF0C\u5E76\u4E14\u8FD9\u4E9B\u6570\u636E\u975E\u6CD5\uFF0C\u90A3\u53EF\u4EE5\u5728\u7F51\u5173\u5C42\u9650\u5236\u8FD9\u4E9B ip \u8BBF\u95EE</p><h4 id="_3-2-3-\u65B9\u6CD5\u4E09" tabindex="-1"><a class="header-anchor" href="#_3-2-3-\u65B9\u6CD5\u4E09" aria-hidden="true">#</a> 3.2.3 \u65B9\u6CD5\u4E09</h4><p>\u63D0\u4F9B\u4E00\u4E2A\u80FD\u8FC5\u901F\u5224\u65AD\u8BF7\u6C42\u662F\u5426\u6709\u6548\u7684\u62E6\u622A\u673A\u5236\uFF0C\u6BD4\u5982\u5E03\u9686\u8FC7\u6EE4\u5668\uFF0CRedis \u672C\u8EAB\u5C31\u5177\u6709\u8FD9\u4E2A\u529F\u80FD\u3002</p><p>\u8BA9\u5B83\u7EF4\u62A4\u6240\u6709\u5408\u6CD5\u7684 key\uFF0C\u5982\u679C\u8BF7\u6C42\u53C2\u6570\u4E0D\u5408\u6CD5\uFF0C\u5219\u76F4\u63A5\u8FD4\u56DE\u3002\u5426\u5219\u5C31\u4ECE\u7F13\u5B58\u6216\u6570\u636E\u5E93\u4E2D\u83B7\u53D6\u3002</p><p>\u5173\u4E8E\u5E03\u9686\u8FC7\u6EE4\u5668\u53EF\u4EE5\u770B\u6211\u4E4B\u524D\u5199\u7684\u6587\u7AE0\uFF1Axxx</p><h2 id="_4-\u4E1A\u52A1\u53EF\u9760\u6027\u5904\u7406" tabindex="-1"><a class="header-anchor" href="#_4-\u4E1A\u52A1\u53EF\u9760\u6027\u5904\u7406" aria-hidden="true">#</a> 4. \u4E1A\u52A1\u53EF\u9760\u6027\u5904\u7406</h2><p>\u5982\u5F00\u5934\u6240\u8BF4\uFF0C\u7F13\u5B58\u6307 Redis\u3002</p><ul><li>\u63D0\u9AD8 Redis \u53EF\u7528\u6027\uFF1ARedis \u8981\u4E48\u7528\u96C6\u7FA4\u67B6\u6784\uFF0C\u8981\u4E48\u7528\u4E3B\u4ECE + \u54E8\u5175\u3002\u4FDD\u8BC1 Redis \u7684\u53EF\u7528\u6027\u3002</li></ul><p>\u6CA1\u6709\u54E8\u5175\u7684\u4E3B\u4ECE\u4E0D\u80FD\u81EA\u52A8\u6545\u969C\u8F6C\u79FB\uFF0C\u6240\u4EE5\u53EA\u6709\u4E3B\u4ECE\uFF0C\u4E07\u4E00\u9AD8\u5CF0\u671F\u6216\u8005\u5728\u5173\u952E\u7684\u6D3B\u52A8\u65F6\u95F4\u8282\u70B9\u6302\u4E86\u3002</p><p>\u90A3\u4E48\u7B49\u51FA\u73B0\u7EBF\u4E0A\u544A\u8B66\u3001\u5B9A\u4F4D\u95EE\u9898\u3001\u6C9F\u901A\u4FE1\u606F\u3001\u7B49\u8FD0\u7EF4\u89E3\u51B3\uFF0C\u4E00\u5957\u64CD\u4F5C\u4E0B\u6765\uFF0C\u4F30\u8BA1\u9EC4\u82B1\u83DC\u90FD\u51C9\u4E86\u3002</p><ul><li>\u51CF\u5C11\u5BF9\u7F13\u5B58\u7684\u4F9D\u8D56</li></ul><p>\u5BF9\u4E8E\u70ED\u70B9\u6570\u636E\uFF0C\u662F\u4E0D\u662F\u53EF\u4EE5\u8003\u8651\u52A0\u4E0A\u672C\u5730\u7F13\u5B58\uFF0C\u6BD4\u5982\uFF1AGuava\u3001Ehcache\uFF0C\u66F4\u7B80\u5355\u70B9\uFF0ChashMap\u3001List \u4EC0\u4E48\u4E5F\u53EF\u4EE5\u3002</p><p>\u51CF\u5C11\u5BF9 Redis \u538B\u529B\u7684\u540C\u65F6\uFF0C\u8FD8\u80FD\u63D0\u9AD8\u6027\u80FD\uFF0C\u4E00\u4E3E\u4E24\u5F97\u3002</p><ul><li>\u4E1A\u52A1\u964D\u7EA7</li></ul><p>\u4ECE\u4FDD\u62A4\u4E0B\u6E38\uFF08\u63A5\u53E3\u6216\u6570\u636E\u5E93\uFF09\u7684\u89D2\u5EA6\u8003\u8651\uFF0C\u9488\u5BF9\u5927\u6D41\u91CF\u573A\u666F\u662F\u4E0D\u662F\u53EF\u4EE5\u505A\u4E0B\u9650\u6D41\u3002\u8FD9\u6837\u5373\u4F7F\u7F13\u5B58\u5D29\u4E86\uFF0C\u4E5F\u4E0D\u81F3\u4E8E\u628A\u4E0B\u6E38\u5168\u90E8\u62D6\u57AE\u3002</p><p>\u4EE5\u53CA\u8BE5\u964D\u7EA7\u7684\u529F\u80FD\u662F\u4E0D\u662F\u53EF\u4EE5\u964D\u7EA7\uFF0C\u63D0\u524D\u5199\u597D\u964D\u7EA7\u5F00\u5173\u548C\u964D\u7EA7\u903B\u8F91\uFF0C\u5173\u952E\u65F6\u5019\u5168\u9760\u5B83\u7A33\u4F4F\u3002</p><hr>',75),c=a("\u4F5C\u8005\uFF1A\u4E03\u6DC5\uFF0C\u8F6C\u8F7D\u94FE\u63A5\uFF1A"),l={href:"https://mp.weixin.qq.com/s/juUzaf1TQYMuJFbw7Y3SXg",target:"_blank",rel:"noopener noreferrer"},_=a("https://mp.weixin.qq.com/s/juUzaf1TQYMuJFbw7Y3SXg"),u=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png",alt:""})],-1);function b(x,f){const r=i("ExternalLinkIcon");return d(),p("div",null,[o,e("blockquote",null,[e("p",null,[c,e("a",l,[_,n(r)])])]),u])}var k=h(s,[["render",b],["__file","xuebeng-chuantou-jichuan.html.vue"]]);export{k as default};
+import{_ as h}from"./plugin-vue_export-helper.21dcd24c.js";import{r as i,o as d,c as p,a as e,b as n,e as t,d as a}from"./app.615e41d8.js";const s={},o=t('<h1 id="\u7B80\u5355\u804A\u804A\u7F13\u5B58\u96EA\u5D29\u3001\u7A7F\u900F\u3001\u51FB\u7A7F" tabindex="-1"><a class="header-anchor" href="#\u7B80\u5355\u804A\u804A\u7F13\u5B58\u96EA\u5D29\u3001\u7A7F\u900F\u3001\u51FB\u7A7F" aria-hidden="true">#</a> \u7B80\u5355\u804A\u804A\u7F13\u5B58\u96EA\u5D29\u3001\u7A7F\u900F\u3001\u51FB\u7A7F</h1><p>\u5927\u5BB6\u597D\uFF0C\u6211\u662F\u4E8C\u54E5\u5440\u3002\u4F5C\u4E3A\u540E\u7AEF\u5F00\u53D1\uFF0C\u6211\u60F3\u7F13\u5B58\u662F\u5927\u5BB6\u518D\u719F\u6089\u4E0D\u8FC7\u7684\u4E1C\u897F\u4E86\u3002</p><p>\u672C\u6587\u4F1A\u4ECB\u7ECD<strong>\u51FA\u73B0\u7F13\u5B58\u96EA\u5D29\u3001\u7A7F\u900F\u548C\u51FB\u7A7F\u7684\u4E1A\u52A1\u80CC\u666F\u3001\u89E3\u51B3\u65B9\u6848\u548C\u5BF9\u4E1A\u52A1\u53EF\u9760\u6027\u5904\u7406</strong>\u3002\u4E8B\u5148\u8BF4\u660E\uFF0C\u6700\u4F73\u89E3\u51B3\u65B9\u6848\u4E00\u5B9A\u9700\u8981\u7ED3\u5408\u5B9E\u9645\u4E1A\u52A1\u8C03\u6574\uFF0C\u4E0D\u540C\u4E1A\u52A1\u7684\u5904\u7406\u4E0D\u5B8C\u5168\u76F8\u540C</p><p>\u5176\u5B9E\u6211\u5728\u7F51\u4E0A\u4E5F\u770B\u8FC7\u4E0D\u5C11\u5173\u4E8E\u7F13\u5B58\u96EA\u5D29\u3001\u7A7F\u900F\u3001\u51FB\u7A7F\u4ECB\u7ECD\uFF0C\u4E0D\u77E5\u9053\u662F\u4E0D\u662F\u5927\u5BB6\u6240\u505A\u4E1A\u52A1\u7684\u4E0D\u540C\uFF0C\u53D1\u73B0\u6709\u4E0D\u5C11\u5C0F\u4F19\u4F34\u6709\u4EE5\u4E0B\u7591\u95EE\uFF0C\u6BD4\u5982\uFF1A</p><ul><li>\u52A0\u968F\u673A\u65F6\u95F4\u8FC7\u671F\u540E\uFF0C\u5982\u679C\u8BBF\u95EE\u65F6\u95F4\u521A\u597D\u5C31\u662F\u52A0\u4E86\u968F\u673A\u65F6\u95F4\u540E\u7684\u6570\u636E\uFF0C\u8FD9\u6837\u5C82\u4E0D\u662F\u767D\u52A0\u4E86\u968F\u673A\u65F6\u95F4\uFF1F</li><li>\u70ED\u70B9\u6570\u636E\u4E0D\u8FC7\u671F\uFF0C\u90A3\u5C82\u4E0D\u662F\u6709\u8D8A\u6765\u8D8A\u591A\u7684\u810F\u6570\u636E\uFF1F</li></ul><p>\u5C31\u4EE5\u4E0A\u95EE\u9898\uFF0C\u6211\u90FD\u4F1A\u5728\u6587\u4E2D\u4E00\u4E00\u89E3\u91CA\uFF0C\u4EE5\u4E0B\u8BF4\u7684\u7F13\u5B58\u90FD\u6307 Redis\u3002</p><p>\u6211\u4E89\u53D6\u628A\u8FD9\u4E00\u9AD8\u9891\u9762\u8BD5\u9898\u8BB2\u660E\u767D\uFF0C\u5982\u679C\u5927\u5BB6\u770B\u540E\u80FD\u5728\u8FD9\u5757\u5185\u5BB9\u548C\u9762\u8BD5\u5B98\u9762\u524D\u8C08\u7B11\u98CE\u751F\uFF0C\u90A3\u4F60\u5C31\u662F\u6700\u9753\u7684\u4ED4\u3002</p><p>\u4E0B\u9762\uFF0C\u6211\u5C31\u5F00\u59CB\u8FDB\u5165\u6B63\u9898\u5566\u3002</p><h2 id="_1-\u7F13\u5B58\u96EA\u5D29" tabindex="-1"><a class="header-anchor" href="#_1-\u7F13\u5B58\u96EA\u5D29" aria-hidden="true">#</a> 1. \u7F13\u5B58\u96EA\u5D29</h2><p>\u5373\u7F13\u5B58\u540C\u4E00\u65F6\u95F4\u5927\u9762\u79EF\u7684\u5931\u6548\uFF0C\u8FD9\u4E2A\u65F6\u5019\u6765\u4E86\u4E00\u5927\u6CE2\u8BF7\u6C42\uFF0C\u90FD\u603C\u5230\u6570\u636E\u5E93\u4E0A\uFF0C\u6700\u540E\u6570\u636E\u5E93\u5904\u7406\u4E0D\u8FC7\u6765\u5D29\u4E86\u3002</p><h3 id="_1-1-\u4E1A\u52A1\u573A\u666F\u4E3E\u4F8B" tabindex="-1"><a class="header-anchor" href="#_1-1-\u4E1A\u52A1\u573A\u666F\u4E3E\u4F8B" aria-hidden="true">#</a> 1.1 \u4E1A\u52A1\u573A\u666F\u4E3E\u4F8B</h3><p>APP \u9996\u9875\u6709\u5927\u91CF\u70ED\u70B9\u6570\u636E\uFF0C\u5728\u67D0\u5927\u578B\u6D3B\u52A8\u671F\u95F4\uFF0C\u9488\u5BF9\u4E0D\u540C\u65F6\u95F4\u6BB5\u9700\u8981\u5C55\u793A\u4E0D\u540C\u7684\u9996\u9875\u6570\u636E\u3002</p><p>\u6BD4\u5982\u5728 0 \u70B9\u65F6\u9700\u8981\u66FF\u6362\u65B0\u7684\u9996\u9875\u6570\u636E\uFF0C\u6B64\u65F6\u65E7\u9996\u9875\u6570\u636E\u8FC7\u671F\uFF0C\u65B0\u9996\u9875\u6570\u636E\u521A\u5F00\u59CB\u52A0\u8F7D\u3002</p><p>\u800C 0 \u70B9\u6B63\u5728\u6709\u4E2A\u5C0F\u6D3B\u52A8\u5F00\u59CB\uFF0C\u5927\u6279\u8BF7\u6C42\u6D8C\u5165\u3002\u56E0\u4E3A\u65B0\u6570\u636E\u521A\u5F00\u59CB\u52A0\u8F7D\uFF0C\u8BF7\u6C42\u591A\u6570\u6CA1\u6709\u547D\u4E2D\u7F13\u5B58\uFF0C\u8BF7\u6C42\u5230\u4E86\u6570\u636E\u5E93\uFF0C\u6700\u540E\u5C31\u628A\u6570\u636E\u5E93\u6253\u6302\u4E86\u3002</p><h3 id="_1-2-\u89E3\u51B3\u65B9\u6848" tabindex="-1"><a class="header-anchor" href="#_1-2-\u89E3\u51B3\u65B9\u6848" aria-hidden="true">#</a> 1.2 \u89E3\u51B3\u65B9\u6848</h3><p><strong>\u518D\u5F3A\u8C03\u4E00\u4E0B\uFF0C\u6240\u8C13\u7684\u89E3\u51B3\u65B9\u6848\u662F\u9700\u8981\u6839\u636E\u5B9E\u9645\u4E1A\u52A1\u8C03\u6574\uFF0C\u4E0D\u540C\u4E1A\u52A1\u7684\u5904\u7406\u4E0D\u5B8C\u5168\u76F8\u540C</strong></p><h4 id="_1-2-1-\u65B9\u6CD5\u4E00" tabindex="-1"><a class="header-anchor" href="#_1-2-1-\u65B9\u6CD5\u4E00" aria-hidden="true">#</a> 1.2.1 \u65B9\u6CD5\u4E00</h4><p>\u5E38\u89C1\u65B9\u5F0F\u5C31\u662F\u7ED9\u8FC7\u671F\u65F6\u95F4\u52A0\u4E2A\u968F\u673A\u65F6\u95F4\u3002</p><p>\u6CE8\u610F\u8FD9\u4E2A\u968F\u673A\u65F6\u95F4\u4E0D\u662F\u51E0\u79D2\u54C8\uFF0C\u53EF\u4EE5\u957F\u8FBE\u51E0\u5206\u949F\u3002\u56E0\u4E3A\u5982\u679C\u6570\u636E\u91CF\u5F88\u5927\uFF0C\u6309\u7167\u4E0A\u8FF0\u4F8B\u5B50\uFF0C\u52A0\u4E0A Redis \u662F\u5355\u7EBF\u7A0B\u5904\u7406\u6570\u636E\u7684\u3002\u90A3\u4E48\u51E0\u79D2\u7684\u7F13\u51B2\u4E0D\u4E00\u5B9A\u80FD\u591F\u4FDD\u8BC1\u65B0\u6570\u636E\u90FD\u88AB\u52A0\u8F7D\u5B8C\u6210\u3002</p><p>\u6240\u4EE5\u8FC7\u671F\u65F6\u95F4\u5B81\u613F\u8BBE\u7F6E\u957F\u4E00\u70B9\uFF0C\u4E5F\u597D\u8FC7\u77ED\u4E00\u70B9\u3002\u53CD\u6B63\u6700\u540E\u90FD\u662F\u4F1A\u8FC7\u671F\u6389\uFF0C\u6700\u7EC8\u6548\u679C\u662F\u4E00\u6837\u7684\u3002</p><p>\u800C\u4E14\u8FC7\u671F\u65F6\u95F4\u8303\u56F4\u52A0\u5927\uFF0Ckey \u4F1A\u66F4\u52A0\u5206\u6563\uFF0C\u8FD9\u6837\u4E5F\u662F\u4E00\u5B9A\u7A0B\u5EA6\u7F29\u77ED Redis \u5728\u8FC7\u671F key \u65F6\u5019\u7684\u963B\u585E\u65F6\u95F4\u3002</p><p>\u800C\u81F3\u4E8E\u6587\u7AE0\u5F00\u5934\u8BF4\u7684\uFF1A\u300C\u5982\u679C\u8BBF\u95EE\u65F6\u95F4\u521A\u597D\u5C31\u662F\u52A0\u4E86\u968F\u673A\u65F6\u95F4\u540E\u7684\u6570\u636E\uFF0C\u8FD9\u6837\u5C82\u4E0D\u662F\u767D\u52A0\u4E86\u968F\u673A\u65F6\u95F4\u300D\u3002</p><p>\u73B0\u5728\u4F60\u7ED3\u5408\u4E0A\u4F8B\u6D3B\u52A8\u7684\u4F8B\u5B50\uFF0C\u5B83\u8FD8\u4F1A\u662F\u4E00\u4E2A\u95EE\u9898\u5417\uFF1F\u7ED3\u5408\u4E1A\u52A1\uFF0C\u4E00\u5B9A\u8981\u7ED3\u5408\u4E1A\u52A1\u3002</p><h4 id="_1-2-2-\u65B9\u6CD5\u4E8C" tabindex="-1"><a class="header-anchor" href="#_1-2-2-\u65B9\u6CD5\u4E8C" aria-hidden="true">#</a> 1.2.2 \u65B9\u6CD5\u4E8C</h4><p>\u52A0\u4E92\u65A5\u9501\uFF0C\u4F46\u8FD9\u4E2A\u65B9\u6848\u4F1A\u5BFC\u81F4\u541E\u5410\u91CF\u660E\u663E\u4E0B\u964D\u3002\u6240\u4EE5\u8FD8\u662F\u8981\u770B\u5B9E\u9645\u4E1A\u52A1\uFF0C\u50CF\u4E0A\u8FF0\u4F8B\u5B50\u5C31\u4E0D\u5408\u9002\u7528</p><h4 id="_1-2-3-\u65B9\u6CD5\u4E09" tabindex="-1"><a class="header-anchor" href="#_1-2-3-\u65B9\u6CD5\u4E09" aria-hidden="true">#</a> 1.2.3 \u65B9\u6CD5\u4E09</h4><p>\u70ED\u70B9\u6570\u636E\u4E0D\u8BBE\u7F6E\u8FC7\u671F\u3002\u4E0D\u8FC7\u671F\u7684\u8BDD\uFF0C\u6B63\u5E38\u4E1A\u52A1\u8BF7\u6C42\u81EA\u7136\u5C31\u4E0D\u4F1A\u6253\u5230\u6570\u636E\u5E93\u4E86\u3002</p><p>\u90A3\u65B0\u7684\u95EE\u9898\u53C8\u6765\u4E86\uFF0C\u4E0D\u8FC7\u671F\u6709\u810F\u6570\u636E\uFF0C\u600E\u4E48\u529E\uFF1F</p><p>\u5F88\u7B80\u5355\uFF0C\u6D3B\u52A8\u6574\u4F53\u7ED3\u675F\u540E\u518D\u5220\u9664\u561B\u3002</p><p>\u90A3\u50CF\u4E0A\u8FF0\u4F8B\u5B50\uFF0C\u53EF\u4EE5\u600E\u4E48\u5904\u7406\u5462\uFF1F\u2014\u2014 \u9009\u62E9\u65B9\u6CD5\u4E00\uFF1B\u6216\u8005\u63D0\u524D\u628A 0 \u70B9\u9700\u8981\u7684\u65B0\u6570\u636E\u52A0\u8F7D\u8FDB Redis\uFF0C\u4E0D\u5FC5\u7B49\u5230 0 \u70B9\u624D\u53BB\u52A0\u8F7D\uFF0C\u8FD9\u6837\u4E5F\u662F\u53EF\u4EE5\u7684</p><h2 id="_2-\u7F13\u5B58\u51FB\u7A7F" tabindex="-1"><a class="header-anchor" href="#_2-\u7F13\u5B58\u51FB\u7A7F" aria-hidden="true">#</a> 2. \u7F13\u5B58\u51FB\u7A7F</h2><p>\u7F13\u5B58\u51FB\u7A7F\u662F\u6307\u4E00\u4E2A\u70ED\u70B9 key \u8FC7\u671F\u6216\u88AB\u5220\u9664\u540E\uFF0C\u5BFC\u81F4\u7EBF\u4E0A\u539F\u672C\u80FD\u547D\u4E2D\u8BE5\u70ED\u70B9 key \u7684\u8BF7\u6C42\uFF0C\u77AC\u95F4\u5927\u91CF\u5730\u6253\u5230\u6570\u636E\u5E93\u4E0A\uFF0C\u6700\u7EC8\u5BFC\u81F4\u6570\u636E\u5E93\u88AB\u51FB\u57AE\u3002</p><p>\u6709\u79CD\u5343\u91CC\u4E4B\u5824\uFF0C\u6E83\u4E8E\u8681\u7A74\u7684\u611F\u89C9\u3002</p><h3 id="_2-1-\u4E1A\u52A1\u573A\u666F\u4E3E\u4F8B" tabindex="-1"><a class="header-anchor" href="#_2-1-\u4E1A\u52A1\u573A\u666F\u4E3E\u4F8B" aria-hidden="true">#</a> 2.1 \u4E1A\u52A1\u573A\u666F\u4E3E\u4F8B</h3><p>\u51FA\u73B0\u60C5\u51B5\u4E00\u822C\u662F\u8BEF\u64CD\u4F5C\uFF0C\u6BD4\u5982\u8BBE\u7F6E\u9519\u4E86\u8FC7\u671F\u65F6\u95F4\u3001\u8BEF\u5220\u9664\u5BFC\u81F4\u7684\u3002</p><blockquote><p>\u8C01\u8FD8\u6CA1\u8BEF\u64CD\u4F5C\u8FC7\u5462\uFF0C\u5220\u5E93\u8DD1\u8DEF\u4E86\u89E3\u4E00\u4E0B\u3002\u53CD\u6B63\u6211\u8BEF\u5220\u8FC7\u6D4B\u8BD5\u5E93\u7684\u6570\u636E\uFF0C\u5E78\u597D\u4EBA\u6CA1\u4E8B\uFF0C\u72D7\u5934\u4FDD\u547D\u3002</p></blockquote><h3 id="_2-2-\u89E3\u51B3\u65B9\u6848" tabindex="-1"><a class="header-anchor" href="#_2-2-\u89E3\u51B3\u65B9\u6848" aria-hidden="true">#</a> 2.2 \u89E3\u51B3\u65B9\u6848</h3><h3 id="\u65B9\u6CD5\u4E00" tabindex="-1"><a class="header-anchor" href="#\u65B9\u6CD5\u4E00" aria-hidden="true">#</a> \u65B9\u6CD5\u4E00</h3><p>\u4EE3\u7801\u95EE\u9898\uFF0C\u8BE5 review \u7684 review\u3002</p><p>\u70ED\u70B9\u6570\u636E\u5230\u5E95\u8981\u4E0D\u8981\u8FC7\u671F\uFF0C\u4EC0\u4E48\u65F6\u5019\u8FC7\u671F\u8981\u660E\u786E</p><p>\u65E2\u7136\u662F\u70ED\u70B9\u6570\u636E\uFF0C\u5927\u6982\u7387\u662F\u6838\u5FC3\u6D41\u7A0B\u3002\u90A3\u4E48\u8BE5\u4FDD\u8BC1\u7684\u6838\u5FC3\u529F\u80FD\u8FD8\u662F\u9700\u8981\u4FDD\u8BC1\u7684\uFF0C\u51CF\u5C11\u72AF\u9519\u673A\u4F1A\u3002\u4E07\u4E00\u51FA\u95EE\u9898\uFF0C\u90A3\u5C31\u662F\u7528\u6237\u7684\u4E00\u6CE2\u8F93\u51FA\u4E86\u3002</p><h3 id="\u65B9\u6CD5\u4E8C" tabindex="-1"><a class="header-anchor" href="#\u65B9\u6CD5\u4E8C" aria-hidden="true">#</a> \u65B9\u6CD5\u4E8C</h3><p>\u7EBF\u4E0A\u8BEF\u64CD\u4F5C\u7684\u4E8B\u60C5\uFF0C\u8BE5\u52A0\u5F3A\u6743\u9650\u7BA1\u7406\u7684\u52A0\u5F3A\uFF0C\u7279\u522B\u662F\u7EBF\u4E0A\u6743\u9650\uFF0C\u4E00\u5B9A\u9700\u8981\u5BA1\u6838\uFF0C\u4EE5\u9632\u624B\u6296\u3002</p><h2 id="_3-\u7F13\u5B58\u7A7F\u900F" tabindex="-1"><a class="header-anchor" href="#_3-\u7F13\u5B58\u7A7F\u900F" aria-hidden="true">#</a> 3. \u7F13\u5B58\u7A7F\u900F</h2><p>\u7F13\u5B58\u7A7F\u900F\u662F\u6307\uFF1A\u5BA2\u6237\u7AEF\u8BF7\u6C42\u7F13\u5B58\u548C\u6570\u636E\u5E93\u4E2D\u4E0D\u5B58\u5728\u7684\u6570\u636E\uFF0C\u5BFC\u81F4\u6240\u6709\u7684\u8BF7\u6C42\u90FD\u6253\u5230\u6570\u636E\u5E93\u4E0A\u3002\u5982\u679C\u8BF7\u6C42\u5F88\u591A\uFF0C\u6570\u636E\u5E93\u4F9D\u65E7\u4F1A\u6302\u5F97\u660E\u660E\u767D\u767D\u3002</p><h3 id="_3-1-\u4E1A\u52A1\u573A\u666F\u4E3E\u4F8B" tabindex="-1"><a class="header-anchor" href="#_3-1-\u4E1A\u52A1\u573A\u666F\u4E3E\u4F8B" aria-hidden="true">#</a> 3.1 \u4E1A\u52A1\u573A\u666F\u4E3E\u4F8B</h3><ul><li>\u6570\u636E\u5E93\u4E3B\u952E id \u90FD\u662F\u6B63\u6570\uFF0C\u7136\u540E\u5BA2\u6237\u7AEF\u53D1\u8D77\u4E86 <code>id = -1</code> \u7684\u67E5\u8BE2</li><li>\u4E00\u4E2A\u67E5\u8BE2\u63A5\u53E3\uFF0C\u6709\u4E00\u4E2A\u72B6\u6001\u5B57\u6BB5 status\uFF0C\u5176\u5B9E 0 \u8868\u793A\u5F00\u59CB\u30011 \u8868\u793A\u7ED3\u675F\u3002\u7ED3\u679C\u6709\u8BF7\u6C42\u4E00\u76F4\u53D1 <code>status=3</code> \u7684\u8BF7\u6C42\u8FC7\u6765</li></ul><h3 id="_3-2-\u89E3\u51B3\u65B9\u6848" tabindex="-1"><a class="header-anchor" href="#_3-2-\u89E3\u51B3\u65B9\u6848" aria-hidden="true">#</a> 3.2 \u89E3\u51B3\u65B9\u6848</h3><h4 id="_3-2-1-\u65B9\u6CD5\u4E00" tabindex="-1"><a class="header-anchor" href="#_3-2-1-\u65B9\u6CD5\u4E00" aria-hidden="true">#</a> 3.2.1 \u65B9\u6CD5\u4E00</h4><p>\u505A\u597D\u53C2\u6570\u6821\u9A8C\uFF0C\u5BF9\u4E8E\u4E0D\u5408\u7406\u7684\u53C2\u6570\u8981\u53CA\u65F6 return \u7ED3\u675F</p><p>\u8FD9\u70B9\u975E\u5E38\u91CD\u70B9\uFF0C\u505A\u4EFB\u4F55\u4E1A\u52A1\u90FD\u4E00\u6837\uFF0C\u5BF9\u4E8E\u540E\u7AEF\u6765\u8BF4\uFF0C\u8981\u6709<strong>\u4E92\u4E0D\u4FE1\u4EFB\u539F\u5219</strong>\u3002</p><p>\u7B80\u5355\u6765\u8BF4\uFF0C\u5C31\u662F\u4E0D\u8981\u4FE1\u4EFB\u6765\u81EA\u524D\u7AEF\u3001\u5BA2\u6237\u7AEF\u548C\u4E0A\u6E38\u670D\u52A1\u7684\u8BF7\u6C42\u6570\u636E\uFF0C\u8BE5\u505A\u7684\u6821\u9A8C\u8FD8\u662F\u8981\u505A\u3002</p><p>\u56E0\u4E3A\u6211\u4EEC\u6C38\u8FDC\u90FD\u4E0D\u77E5\u9053\u7528\u6237\u4F1A\u5199\u4EC0\u4E48\u5947\u5947\u602A\u602A\u7684\u6570\u636E\uFF1B\u53C8\u6216\u8005\u5373\u4F7F\u4F60\u548C\u5BF9\u63A5\u7684\u5F00\u53D1\u7EA6\u5B9A\u597D\u4E86\u8981\u600E\u4E48\u4F20\u53C2\u6570\uFF0C\u4F46\u4F60\u4FDD\u4E0D\u51C6\u4ED6\u5C31\u6CA1\u9075\u5B88\u5462\uFF1B\u9000\u4E00\u6B65\u6765\u8BF4\uFF0C\u4E07\u4E00\u63A5\u53E3\u88AB\u7834\u89E3\u5462\u3002</p><p>\u4F60\u8981\u4FDD\u62A4\u597D\u81EA\u5DF1\uFF0C\u4E0D\u7136\u5230\u65F6\u51FA\u95EE\u9898\u65F6\uFF0C\u4F60\u548C\u8001\u5927\u8BF4\uFF0C\u56E0\u4E3A\u8C01\u8C01\u4E0D\u9075\u5B88\u7EA6\u5B9A\u4F20\u53C2\u5BFC\u81F4\uFF0C\u6216\u8005\u56E0\u4E3A\u6CA1\u60F3\u5230\u7528\u6237\u4F1A\u8FD9\u4E48\u586B\uFF0C\u4F60\u770B\u770B\u4F60\u8001\u5927\u4F1A\u8FD9\u4E48\u8BF4\uFF08\u72D7\u5934.jpg\uFF09</p><h4 id="_3-2-2-\u65B9\u6CD5\u4E8C" tabindex="-1"><a class="header-anchor" href="#_3-2-2-\u65B9\u6CD5\u4E8C" aria-hidden="true">#</a> 3.2.2 \u65B9\u6CD5\u4E8C</h4><p>\u5BF9\u4E8E\u67E5\u4E0D\u5230\u6570\u636E\u7684 key\uFF0C\u4E5F\u5C06\u5176\u77ED\u6682\u7F13\u5B58\u8D77\u6765\u3002</p><p>\u6BD4\u5982 30s\u3002\u8FD9\u6837\u80FD\u907F\u514D\u5927\u91CF\u76F8\u540C\u8BF7\u6C42\u77AC\u95F4\u6253\u5230\u6570\u636E\u5E93\u4E0A\uFF0C\u51CF\u8F7B\u538B\u529B\u3002</p><p>\u4F46\u662F\u540E\u9762\u80AF\u5B9A\u8981\u53BB\u770B\u4E3A\u4EC0\u4E48\u4F1A\u6709\u8FD9\u6837\u7684\u6570\u636E\uFF0C\u4ECE\u6839\u672C\u4E0A\u89E3\u51B3\u95EE\u9898\uFF0C\u8BE5\u65B9\u6CD5\u53EA\u662F\u7F13\u89E3\u95EE\u9898\u800C\u5DF2\u3002</p><p>\u5982\u679C\u53D1\u73B0\u5C31\u662F\u67D0\u4E9B ip \u5728\u8BF7\u6C42\uFF0C\u5E76\u4E14\u8FD9\u4E9B\u6570\u636E\u975E\u6CD5\uFF0C\u90A3\u53EF\u4EE5\u5728\u7F51\u5173\u5C42\u9650\u5236\u8FD9\u4E9B ip \u8BBF\u95EE</p><h4 id="_3-2-3-\u65B9\u6CD5\u4E09" tabindex="-1"><a class="header-anchor" href="#_3-2-3-\u65B9\u6CD5\u4E09" aria-hidden="true">#</a> 3.2.3 \u65B9\u6CD5\u4E09</h4><p>\u63D0\u4F9B\u4E00\u4E2A\u80FD\u8FC5\u901F\u5224\u65AD\u8BF7\u6C42\u662F\u5426\u6709\u6548\u7684\u62E6\u622A\u673A\u5236\uFF0C\u6BD4\u5982\u5E03\u9686\u8FC7\u6EE4\u5668\uFF0CRedis \u672C\u8EAB\u5C31\u5177\u6709\u8FD9\u4E2A\u529F\u80FD\u3002</p><p>\u8BA9\u5B83\u7EF4\u62A4\u6240\u6709\u5408\u6CD5\u7684 key\uFF0C\u5982\u679C\u8BF7\u6C42\u53C2\u6570\u4E0D\u5408\u6CD5\uFF0C\u5219\u76F4\u63A5\u8FD4\u56DE\u3002\u5426\u5219\u5C31\u4ECE\u7F13\u5B58\u6216\u6570\u636E\u5E93\u4E2D\u83B7\u53D6\u3002</p><p>\u5173\u4E8E\u5E03\u9686\u8FC7\u6EE4\u5668\u53EF\u4EE5\u770B\u6211\u4E4B\u524D\u5199\u7684\u6587\u7AE0\uFF1Axxx</p><h2 id="_4-\u4E1A\u52A1\u53EF\u9760\u6027\u5904\u7406" tabindex="-1"><a class="header-anchor" href="#_4-\u4E1A\u52A1\u53EF\u9760\u6027\u5904\u7406" aria-hidden="true">#</a> 4. \u4E1A\u52A1\u53EF\u9760\u6027\u5904\u7406</h2><p>\u5982\u5F00\u5934\u6240\u8BF4\uFF0C\u7F13\u5B58\u6307 Redis\u3002</p><ul><li>\u63D0\u9AD8 Redis \u53EF\u7528\u6027\uFF1ARedis \u8981\u4E48\u7528\u96C6\u7FA4\u67B6\u6784\uFF0C\u8981\u4E48\u7528\u4E3B\u4ECE + \u54E8\u5175\u3002\u4FDD\u8BC1 Redis \u7684\u53EF\u7528\u6027\u3002</li></ul><p>\u6CA1\u6709\u54E8\u5175\u7684\u4E3B\u4ECE\u4E0D\u80FD\u81EA\u52A8\u6545\u969C\u8F6C\u79FB\uFF0C\u6240\u4EE5\u53EA\u6709\u4E3B\u4ECE\uFF0C\u4E07\u4E00\u9AD8\u5CF0\u671F\u6216\u8005\u5728\u5173\u952E\u7684\u6D3B\u52A8\u65F6\u95F4\u8282\u70B9\u6302\u4E86\u3002</p><p>\u90A3\u4E48\u7B49\u51FA\u73B0\u7EBF\u4E0A\u544A\u8B66\u3001\u5B9A\u4F4D\u95EE\u9898\u3001\u6C9F\u901A\u4FE1\u606F\u3001\u7B49\u8FD0\u7EF4\u89E3\u51B3\uFF0C\u4E00\u5957\u64CD\u4F5C\u4E0B\u6765\uFF0C\u4F30\u8BA1\u9EC4\u82B1\u83DC\u90FD\u51C9\u4E86\u3002</p><ul><li>\u51CF\u5C11\u5BF9\u7F13\u5B58\u7684\u4F9D\u8D56</li></ul><p>\u5BF9\u4E8E\u70ED\u70B9\u6570\u636E\uFF0C\u662F\u4E0D\u662F\u53EF\u4EE5\u8003\u8651\u52A0\u4E0A\u672C\u5730\u7F13\u5B58\uFF0C\u6BD4\u5982\uFF1AGuava\u3001Ehcache\uFF0C\u66F4\u7B80\u5355\u70B9\uFF0ChashMap\u3001List \u4EC0\u4E48\u4E5F\u53EF\u4EE5\u3002</p><p>\u51CF\u5C11\u5BF9 Redis \u538B\u529B\u7684\u540C\u65F6\uFF0C\u8FD8\u80FD\u63D0\u9AD8\u6027\u80FD\uFF0C\u4E00\u4E3E\u4E24\u5F97\u3002</p><ul><li>\u4E1A\u52A1\u964D\u7EA7</li></ul><p>\u4ECE\u4FDD\u62A4\u4E0B\u6E38\uFF08\u63A5\u53E3\u6216\u6570\u636E\u5E93\uFF09\u7684\u89D2\u5EA6\u8003\u8651\uFF0C\u9488\u5BF9\u5927\u6D41\u91CF\u573A\u666F\u662F\u4E0D\u662F\u53EF\u4EE5\u505A\u4E0B\u9650\u6D41\u3002\u8FD9\u6837\u5373\u4F7F\u7F13\u5B58\u5D29\u4E86\uFF0C\u4E5F\u4E0D\u81F3\u4E8E\u628A\u4E0B\u6E38\u5168\u90E8\u62D6\u57AE\u3002</p><p>\u4EE5\u53CA\u8BE5\u964D\u7EA7\u7684\u529F\u80FD\u662F\u4E0D\u662F\u53EF\u4EE5\u964D\u7EA7\uFF0C\u63D0\u524D\u5199\u597D\u964D\u7EA7\u5F00\u5173\u548C\u964D\u7EA7\u903B\u8F91\uFF0C\u5173\u952E\u65F6\u5019\u5168\u9760\u5B83\u7A33\u4F4F\u3002</p><hr>',75),c=a("\u4F5C\u8005\uFF1A\u4E03\u6DC5\uFF0C\u8F6C\u8F7D\u94FE\u63A5\uFF1A"),l={href:"https://mp.weixin.qq.com/s/juUzaf1TQYMuJFbw7Y3SXg",target:"_blank",rel:"noopener noreferrer"},_=a("https://mp.weixin.qq.com/s/juUzaf1TQYMuJFbw7Y3SXg"),u=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png",alt:""})],-1);function b(x,f){const r=i("ExternalLinkIcon");return d(),p("div",null,[o,e("blockquote",null,[e("p",null,[c,e("a",l,[_,n(r)])])]),u])}var k=h(s,[["render",b],["__file","xuebeng-chuantou-jichuan.html.vue"]]);export{k as default};
diff --git a/dist/assets/yanjiusuo-20wan.html.a3e5343d.js b/dist/assets/yanjiusuo-20wan.html.4b71b495.js
similarity index 99%
rename from dist/assets/yanjiusuo-20wan.html.a3e5343d.js
rename to dist/assets/yanjiusuo-20wan.html.4b71b495.js
index c6d62a00..daff5c75 100644
--- a/dist/assets/yanjiusuo-20wan.html.a3e5343d.js
+++ b/dist/assets/yanjiusuo-20wan.html.4b71b495.js
@@ -1 +1 @@
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noreferrer"},u=p("\u7F8E\u56E2\u8FD8\u662F\u7814\u7A76\u6240\uFF0C\u7F8E\u56E2\u5E74\u5305\u591A\u4E8C\u5341\u4E07\uFF0C\u600E\u4E48\u9009"),d=p("\u7684\u6587\u7AE0\u91CC\u505A\u8FC7\u4E00\u4E2A\u6295\u7968\uFF1A\u4E00\u7EBF\u4E92\u8054\u7F51\u5927\u5382\u8FD8\u662F\u4E8C\u4E09\u7EBF\u57CE\u5E02\u7684\u7814\u7A76\u6240\uFF1F"),b=c('<p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/manongshenghuo/yanjiusuo-20wan-1.png" alt=""></p><p>1000 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noreferrer"},u=p("\u7F8E\u56E2\u8FD8\u662F\u7814\u7A76\u6240\uFF0C\u7F8E\u56E2\u5E74\u5305\u591A\u4E8C\u5341\u4E07\uFF0C\u600E\u4E48\u9009"),d=p("\u7684\u6587\u7AE0\u91CC\u505A\u8FC7\u4E00\u4E2A\u6295\u7968\uFF1A\u4E00\u7EBF\u4E92\u8054\u7F51\u5927\u5382\u8FD8\u662F\u4E8C\u4E09\u7EBF\u57CE\u5E02\u7684\u7814\u7A76\u6240\uFF1F"),b=c('<p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/manongshenghuo/yanjiusuo-20wan-1.png" alt=""></p><p>1000 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or \u7814\u7A76\u6240\uFF1F</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/manongshenghuo/yanjiusuo-20wan-3.png" alt=""></p><p><em>\u6CA1\u6709\u4EC0\u4E48\u4F7F\u6211\u505C\u7559\u2014\u2014\u9664\u4E86\u76EE\u7684\uFF0C\u7EB5\u7136\u5CB8\u65C1\u6709\u73AB\u7470\u3001\u6709\u7EFF\u836B\u3001\u6709\u5B81\u9759\u7684\u6E2F\u6E7E\uFF0C\u6211\u662F\u4E0D\u7CFB\u4E4B\u821F</em>\u3002</p>',36);function g(w,f){const t=a("ExternalLinkIcon");return n(),r("div",null,[h,l,e("p",null,[_,e("a",m,[u,s(t)]),d]),b])}var x=o(i,[["render",g],["__file","yanjiusuo-20wan.html.vue"]]);export{x as default};
diff --git a/dist/assets/yitiaolong.html.6c191a66.js b/dist/assets/yitiaolong.html.277dddb2.js
similarity index 99%
rename from dist/assets/yitiaolong.html.6c191a66.js
rename to dist/assets/yitiaolong.html.277dddb2.js
index ae0e33d9..ac66499d 100644
--- a/dist/assets/yitiaolong.html.6c191a66.js
+++ b/dist/assets/yitiaolong.html.277dddb2.js
@@ -1 +1 @@
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\u521D\u5B66\u8005\uFF0C\u56E0\u4E3A\u662F\u521D\u5B66\uFF0C\u6240\u4EE5\u9762\u4E34\u7740\u5DE8\u5927\u7684\u538B\u529B\uFF0C\u4E0D\u80FD\u4ED8\u51FA\u592A\u9AD8\u7684\u8BD5\u9519\u6210\u672C\u3002\u800C\u5E94\u8BE5\u5BFB\u627E\u4E00\u6761\u66F4\u9AD8\u6548\u7684\u5B66\u4E60\u8DEF\u7EBF\u548C\u4E00\u5957\u884C\u4E4B\u6709\u6548\u7684\u5B66\u4E60\u65B9\u6CD5\uFF0C\u5426\u5219\u4E00\u4E0D\u5C0F\u5FC3\uFF0C\u5F88\u53EF\u80FD\u4F1A\u524D\u529F\u5C3D\u5F03\u3002</p><p>\u4F46\u597D\u5728 Java \u7684\u5B66\u4E60\u8D44\u6599\u975E\u5E38\u4E30\u5BCC\uFF0C\u53EA\u8981\u6211\u4EEC\u7A0D\u5FAE\u7528\u5FC3\u53BB\u6574\u7406\u4E0B\uFF0C\u5C31\u80FD\u627E\u51FA\u4E00\u6761\u9AD8\u6548\u7684\u5B66\u4E60\u8DEF\u5F84\u3002\u8FC7\u53BB\u8FD9\u4E24\u5E74\u91CC\uFF0C\u6211\u4E0D\u65AD\u5730\u6574\u7406\u81EA\u5DF1\u7684\u601D\u8DEF\uFF0C\u5206\u4EAB\u4E86\u4E0D\u5C11\u5173\u4E8E Java \u65B9\u9762\u7684\u6587\u7AE0\uFF0C\u4F46\u90FD\u8FC7\u4E8E\u5206\u6563\uFF0C\u501F\u8FD9\u4E2A\u673A\u4F1A\uFF0C\u6211\u6253\u7B97\u91CD\u65B0\u68B3\u7406\u4E00\u904D\uFF0C\u5E0C\u671B\u80FD\u5BF9\u5927\u5BB6\u7684\u5B66\u4E60\u6709\u6240\u5E2E\u52A9\u3002</p><h2 id="\u5B66\u4E60java\u4E4B\u524D\u53EF\u4EE5\u5148\u5B66\u4E00\u4E0Bc\u8BED\u8A00" tabindex="-1"><a class="header-anchor" href="#\u5B66\u4E60java\u4E4B\u524D\u53EF\u4EE5\u5148\u5B66\u4E00\u4E0Bc\u8BED\u8A00" aria-hidden="true">#</a> \u5B66\u4E60Java\u4E4B\u524D\u53EF\u4EE5\u5148\u5B66\u4E00\u4E0BC\u8BED\u8A00</h2><p>\u5BF9\u4E8E\u79D1\u73ED\u7684\u540C\u5B66\u6765\u8BF4\uFF0C\u6211\u5EFA\u8BAE\u5728\u5B66\u4E60 Java \u8FD9\u95E8\u7F16\u7A0B\u8BED\u8A00\u4E4B\u524D\uFF0C\u5B66\u4E00\u4E0B C \u8BED\u8A00\u3002\u6211\u4E0A\u5927\u5B66\u90A3\u4F1A\uFF0C\u6559\u6750\u7528\u7684\u662F\u300AJava \u7F16\u7A0B\u601D\u60F3\u300B\uFF0C\u4F46\u8BF4\u771F\u7684\uFF0C\u8FD9\u672C\u4E66\u5BF9\u521D\u5B66\u8005\u5E76\u4E0D\u53CB\u597D\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/yitiaolong-d5e5b52c-1744-468c-ab9c-f77c24415394.jpg" alt=""></p><p>\u7F16\u7A0B\u8BED\u8A00\u90FD\u662F\u76F8\u901A\u7684\uFF0CC\u8BED\u8A00\u4F5C\u4E3A Java \u8BED\u8A00\u7684\u6BCD\u80CE\uFF0C<strong>\u8FD8\u662F\u975E\u5E38\u503C\u5F97\u79D1\u73ED\u53BB\u5B66\u4E60\u4E00\u4E0B\u6253\u6253\u57FA\u7840\u7684</strong>\u3002\u5176\u5B9E\u5BF9\u4E8E\u6211\u4EEC\u7A0B\u5E8F\u5458\u6765\u8BF4\uFF0C\u5B66\u7684\u662F\u8BA1\u7B97\u673A\u79D1\u5B66\uFF0C\u800C\u4E0D\u662F\u7F16\u7A0B\u8BED\u8A00\uFF0C\u8BED\u8A00\u53EA\u662F\u5DE5\u5177\uFF0C\u6CA1\u6709\u4F18\u52A3\u3002\u50CF\u6211\uFF0C\u5C31\u5B66\u8FC7 Java\u3001C \u8BED\u8A00\u3001Ruby\u3001JavaScript \u7B49\u7B49\u8FD9\u4E9B\u7F16\u7A0B\u8BED\u8A00\uFF0C\u4ED6\u4EEC\u4E4B\u95F4\u786E\u5B9E\u6709\u5F88\u591A\u76F8\u4F3C\u4E4B\u5904\u3002\u5982\u679C\u5B66\u8FC7 JavaScript\uFF0C\u80FD\u5F88\u5BB9\u6613\u641E\u61C2 Java \u7684 Lambda \u8868\u8FBE\u5F0F\u3002</p><p>C \u8BED\u8A00\u7684\u7279\u6B8A\u6027\u5C31\u5728\u4E8E\u5B83\u53EF\u80FD\u662F\u552F\u4E00\u4E00\u95E8\u6700\u9002\u5408\u6765\u5B66\u4E60\u4E00\u7CFB\u5217\u8BA1\u7B97\u673A\u57FA\u7840\u7684\u5A92\u4ECB\uFF0C\u6BD4\u5982 Linux \u64CD\u4F5C\u7CFB\u7EDF\uFF0C\u5C31\u662F\u7528 C \u8BED\u8A00\u91CD\u6784\u7684\uFF1B\u6BD4\u5982\u8BA1\u7B97\u673A\u7F51\u7EDC\uFF0C\u91CC\u9762\u6709\u5F88\u591A\u7F51\u7EDC\u534F\u8BAE\uFF0C\u6709\u4E0D\u540C\u7684 header \u5B9A\u4E49\uFF0C\u8FD9\u4E9B\u5B57\u6BB5\u7528 C \u8BED\u8A00\u7684 union \u548C struct \u6765\u64CD\u4F5C\u975E\u5E38\u4FBF\u6377\u3002Java \u4E2D\u867D\u7136\u5254\u9664\u4E86\u6307\u9488\u8FD9\u79CD\u70E6\u4EBA\u7684\u4E1C\u897F\uFF0C\u4F46\u8BF4\u767D\u4E86\uFF0C\u5F15\u7528\u5176\u5B9E\u548C\u6307\u9488\u5DEE\u4E0D\u591A\uFF0C\u7406\u89E3\u4E86 C \u8BED\u8A00\u4E2D\u7684\u6307\u9488\uFF0C\u5C31\u80FD\u5F88\u597D\u7684\u7406\u89E3 Java \u4E2D\u7684\u5F15\u7528\u3002</p><p>\u5F53\u7136\u4E86\uFF0C\u7531\u4E8E C \u8BED\u8A00\u7684\u62BD\u8C61\u7A0B\u5EA6\u66F4\u9AD8\uFF0C\u5B66\u8D77\u6765\u4E5F\u9700\u8981\u82B1\u8D39\u4E00\u756A\u529F\u592B\u3002\u5BF9\u4E8E\u79D1\u73ED\u7684\u521D\u5B66\u8005\u6765\u8BF4\uFF0C\u6211\u63A8\u8350\u7FC1\u607A\u6559\u6388\u7684 C \u8BED\u8A00\u7A0B\u5E8F\u8BBE\u8BA1\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/yitiaolong-82aefde9-8a3f-4f28-aad5-02e39a6b9d4b.png" alt=""></p>',11),h=t("B \u7AD9\u5730\u5740\uFF1A"),d={href:"https://www.bilibili.com/video/BV19W411B7w1",target:"_blank",rel:"noopener noreferrer"},b=t("https://www.bilibili.com/video/BV19W411B7w1"),_=n('<p>\u559C\u6B22\u770B\u4E66\u7684\u540C\u5B66\u6211\u53EA\u63A8\u8350\u4E00\u672C\uFF0C\u300A<strong>\u962E\u4E00\u5CF0\u8001\u5E08\u7684 C\u8BED\u8A00\u5165\u95E8\u6559\u7A0B</strong>\u300B\uFF0C\u6211\u7B2C\u4E00\u65F6\u95F4\u5C31\u62DC\u8BFB\u4E86\u4E00\u904D\uFF0C\u53D7\u76CA\u532A\u6D45\uFF01\u53EF\u4EE5\u8BF4\u76EE\u524D\u6211\u89C1\u5230\u7684\u6700\u597D\u7684 C\u8BED\u8A00\u5165\u95E8\u6559\u7A0B\u4E86\uFF0C\u6CA1\u6709\u4E4B\u4E00\uFF01</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/yitiaolong-3507eb06-8424-4b8e-b20d-046268508c9d.png" alt=""></p><p>\u6211\u7B2C\u4E00\u65F6\u95F4\u5C31\u6574\u7406\u4E86\u4E00\u4EFD PDF \u7248\u7684\uFF0C\u9700\u8981\u7684\u5C0F\u4F19\u4F34\u53EF\u4EE5\u957F\u6309\u8BC6\u522B/\u626B\u63CF\u4E0B\u65B9\u4E8C\u7EF4\u7801\uFF0C\u5173\u6CE8\u540E\u56DE\u590D \u300C<strong>\u962E\u4E00\u5CF0</strong>\u300D \u4E0B\u8F7D\u8FD9\u4EFD PDF \u5427\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongzhonghao.png" alt="\u626B\u7801\u5173\u6CE8\u540E\u56DE\u590D\u300C\u962E\u4E00\u5CF0\u300D\u5173\u952E\u5B57"></p><p>\u5728\u5B66\u4E60\u7684\u8FC7\u7A0B\u4E2D\u5207\u8BB0\u4E00\u70B9\uFF0C\u5C31\u662F\u4E00\u5B9A\u8981\u591A\u7EC3\u591A\u7EC3\u591A\u7EC3\uFF0C\u8FD9\u4E00\u70B9\u4E0D\u4EC5\u9002\u5408\u5B66\u4E60 C\u8BED\u8A00\uFF0C\u4E5F\u9002\u5408\u5B66\u4E60 Java \u8BED\u8A00\u3002\u6709\u53E5\u8BDD\u8BF4\u5F97\u597D\u5440\uFF0C<strong>\u770B\u61C2\u4E86+\u4E0A\u4E07\u884C\u4EE3\u7801=\u5B66\u4F1A\u4E86</strong>\u3002\u65E0\u8BBA\u662F\u770B\u89C6\u9891\u5B66\u4E60\uFF0C\u8FD8\u662F\u770B\u4E66\u5B66\u4E60\uFF0C\u6700\u6015\u7684\u5C31\u662F\u773C\u9AD8\u624B\u4F4E\uFF0C\u4EE5\u4E3A\u81EA\u5DF1\u770B\u61C2\u4E86\uFF0C\u5B9E\u9645\u4E0A\u5462\uFF0C\u79BB\u5B66\u4F1A\u4E86\u8FD8\u5DEE\u4E0A\u4E07\u884C\u4EE3\u7801\u3002</p><p>\u5BF9\u4E8E\u975E\u79D1\u73ED\u7684\u540C\u5B66\u6765\u8BF4\uFF0C\u5982\u679C\u65F6\u95F4\u6BD4\u8F83\u7D27\u8FEB\u7684\u8BDD\uFF0C\u53EF\u4EE5\u76F4\u63A5\u4E0A\u624B Java\uFF0C\u6211\u89C9\u5F97\u53EA\u8981\u5B66\u4E60\u8D44\u6599\u9009\u7684\u597D\uFF0C\u4E5F\u662F\u5B8C\u5168\u6CA1\u6709\u95EE\u9898\u7684\u3002</p><h2 id="\u5B66\u4E60java\u4E4B\u524D\u8981\u5B89\u88C5\u7684\u8F6F\u4EF6" tabindex="-1"><a class="header-anchor" href="#\u5B66\u4E60java\u4E4B\u524D\u8981\u5B89\u88C5\u7684\u8F6F\u4EF6" aria-hidden="true">#</a> \u5B66\u4E60Java\u4E4B\u524D\u8981\u5B89\u88C5\u7684\u8F6F\u4EF6</h2><p>\u5DE5\u6B32\u5584\u5176\u4E8B\u5FC5\u5148\u5229\u5176\u5668\uFF0C\u6218\u6597\u4E4B\u524D\u6211\u4EEC\u8981\u5148\u914D\u5907\u597D\u6B66\u5668\u3002</p><p>JDK \u662F Java Development ToolKit \u7684\u7B80\u79F0\uFF0C\u4E5F\u5C31\u662F Java \u5F00\u53D1\u5DE5\u5177\u5305\u3002JDK \u662F\u6574\u4E2A Java \u7684\u6838\u5FC3\uFF0C\u5305\u62EC Java \u8FD0\u884C\u73AF\u5883\uFF08Java Runtime Envirnment\uFF0C\u7B80\u79F0 JRE\uFF09\uFF0CJava \u5DE5\u5177\uFF08\u6BD4\u5982 javac\u3001java\u3001javap \u7B49\u7B49\uFF09\uFF0C\u4EE5\u53CA Java \u57FA\u7840\u7C7B\u5E93\uFF08\u6BD4\u5982 rt.jar\uFF09\uFF0C\u5B66\u4E60 Java \u4E4B\u524D\u5FC5\u987B\u8981\u5B89\u88C5\u3002</p><p>\u5DF2\u7ECF 2022 \u5E74\u4E86\uFF0C\u771F\u6CA1\u5FC5\u8981\u5728\u8BB0\u4E8B\u672C\u4E0A\u6572\u4EE3\u7801\u4E86\u3002\u53CD\u6B63\u6211\u9047\u5230\u8FC7\u592A\u591A\u7684\u8BFE\u7A0B\uFF0C\u5305\u62EC\u6211\u4E0A\u5927\u5B66\u65F6\u5019\u7684\u8001\u5E08\uFF0C\u90FD\u4E00\u800C\u518D\u518D\u800C\u4E09\u7684\u5F3A\u8C03\uFF0C\u4E00\u5B9A\u8981\u7528\u8BB0\u4E8B\u672C\u6572\u51FA\u6765\u7B2C\u4E00\u4E2A\u7A0B\u5E8F\uFF0C\u5E76\u4E14\u5728\u547D\u4EE4\u884C\u91CC\u6210\u529F\u8FD0\u884C\u8D77\u6765\u3002</p><p>\u8FD9\u4E48\u591A\u5E74\u4E0B\u6765\uFF0C\u6211\u89C9\u5F97\u8FD9\u4E2A\u5EFA\u8BAE\u771F\u7684\u662F\u7CDF\u7CD5\u6781\u4E86\u3002\u8BB0\u4E8B\u672C\u548C\u547D\u4EE4\u884C\uFF0C\u600E\u4E48\u80FD\u8BA9\u521D\u5B66\u8005\u4E0A\u624B\u5462\uFF1F\u6700\u8D77\u7801\u4E5F\u5F97\u662F\u4E2A\u8001\u6C5F\u6E56\u624D\u884C\u554A\uFF01\u5F53\u5E74\u6211\u5C31\u5DEE\u70B9\u88AB\u8BB0\u4E8B\u672C\u548C\u547D\u4EE4\u884C\u529D\u9000\u3002</p><p>Intellij IDEA\uFF0C\u4E0D\u7528\u8BF4\uFF0C\u662F\u7F16\u5199 Java \u7A0B\u5E8F\u7684\u6700\u4F73 IDE\uFF0C\u521D\u5B66\u8005\u9009\u62E9\u793E\u533A\u7248\u5C31\u5B8C\u5168\u591F\u7528\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/yitiaolong-3fb56f9d-942a-4439-8bab-0f19bd59ef58.png" alt=""></p><p>\u521D\u6B21\u4F7F\u7528\u7684\u8BDD\uFF0C\u5EFA\u8BAE\u9605\u8BFB\u4E00\u4E0B\u300AIntelliJ IDEA \u7B80\u4F53\u4E2D\u6587\u4E13\u9898\u6559\u7A0B\u300B\uFF0CGitHub \u4E0A\u5DF2\u5F00\u6E90\u3002</p>',14),g=t("\u5730\u5740\uFF1A"),v={href:"https://github.com/judasn/IntelliJ-IDEA-Tutorial",target:"_blank",rel:"noopener noreferrer"},u=t("https://github.com/judasn/IntelliJ-IDEA-Tutorial"),m=e("p",null,"Maven \u662F\u4E00\u4E2A\u9879\u76EE\u7BA1\u7406\u548C\u81EA\u52A8\u5316\u6784\u5EFA\u5DE5\u5177\uFF0C\u57FA\u4E8E\u9879\u76EE\u5BF9\u8C61\u6A21\u578B\uFF08POM\uFF09\u7684\u6982\u5FF5\uFF0C\u53EF\u4EE5\u7BA1\u7406\u9879\u76EE\u7684\u6784\u5EFA\u3001\u62A5\u544A\u4EE5\u53CA\u6587\u6863\u3002\u4F5C\u4E3A Apache \u7EC4\u7EC7\u4E2D\u7684\u4E00\u4E2A\u9887\u4E3A\u6210\u529F\u7684\u5F00\u6E90\u9879\u76EE\uFF0CMaven \u4E3B\u8981\u670D\u52A1\u4E8E\u57FA\u4E8E Java \u7684\u9879\u76EE\u6784\u5EFA\u3001\u4F9D\u8D56\u7BA1\u7406\u548C\u9879\u76EE\u4FE1\u606F\u7BA1\u7406\u3002\u6709\u4E86 Maven \u4EE5\u540E\uFF0C\u7B2C\u4E09\u65B9\u7C7B\u5E93\u7BA1\u7406\u8D77\u6765\u5C31\u8212\u670D\u591A\u4E86\u3002",-1),f=t("\u5B89\u88C5\u548C\u914D\u7F6E\u6559\u7A0B\u76F4\u63A5\u770B\u6211\u5199\u8FC7\u7684\u8FD9\u7BC7\u6587\u7AE0"),j={href:"https://mp.weixin.qq.com/s/3umZOaI4l0EIZ5RgtEDchw",target:"_blank",rel:"noopener noreferrer"},J=t("10\u5206\u949F\uFF0C\u638C\u63E1\u9879\u76EE\u6784\u5EFA\u795E\u5668Maven"),x=t("\u5C31\u597D\u4E86\u3002"),w=t("\u53E6\u5916\uFF0C\u6211\u63A8\u8350\u5927\u5BB6\u4F7F\u7528 GitHub/\u7801\u4E91\u6765\u4F5C\u4E3A\u79C1\u6709\u7684\u4EE3\u7801\u4ED3\u5E93\uFF0C\u7279\u522B\u65B9\u4FBF\uFF0C\u514D\u8D39\u8FD8\u53EF\u4EE5\u4E91\u540C\u6B65\u3002\u8FD8\u4E0D\u592A\u719F\u6089"),k={href:"https://tobebetterjavaer.com/git/git-qiyuan.html",target:"_blank",rel:"noopener noreferrer"},B=t("Git \u547D\u4EE4"),S=t("\u7684\u8BDD\uFF0C\u53EF\u4EE5\u4E0B\u8F7D"),M={href:"https://desktop.github.com/",target:"_blank",rel:"noopener noreferrer"},y=t("GitHub \u684C\u9762\u7248"),V=t("\u6765\u50BB\u74DC\u5F0F\u5730\u64CD\u4F5C\u3002"),C=n('<p>\u8FD9\u4E00\u5957\u8F6F\u4EF6\u5B89\u88C5\u5B8C\u6210\u540E\uFF0C\u57FA\u672C\u4E0A\u5F00\u53D1 Java \u7684\u5FC5\u5907\u5DE5\u5177\u5C31\u9F50\u6D3B\u4E86\u3002\u63A5\u4E0B\u6765\uFF0C\u5C31\u53EF\u4EE5\u653E\u5FC3\u5927\u80C6\u7684\u8FDB\u5165 Java \u7684\u4E16\u754C\u4E86\u3002</p><h2 id="java-\u5B66\u4E60\u7684\u91CD\u70B9\u662F\u4EC0\u4E48" tabindex="-1"><a class="header-anchor" href="#java-\u5B66\u4E60\u7684\u91CD\u70B9\u662F\u4EC0\u4E48" aria-hidden="true">#</a> Java \u5B66\u4E60\u7684\u91CD\u70B9\u662F\u4EC0\u4E48</h2><p>\u201C\u51B0\u51BB\u4E09\u5C3A\u975E\u4E00\u65E5\u4E4B\u5BD2\u201D\uFF0C\u8981\u60F3\u628A Java \u5B66\u597D\uFF0C\u8FD8\u662F\u9700\u8981\u82B1\u8D39\u4E00\u756A\u529F\u592B\u7684\u3002Java \u8BED\u8A00\u7684\u77E5\u8BC6\u70B9\u975E\u5E38\u591A\uFF0C\u800C\u6211\u4EEC\u53C8\u65F6\u95F4\u7D27\u8FEB\uFF0C\u610F\u5473\u7740\u53EA\u80FD\u6311\u91CD\u70B9\u3001\u6311\u5B9E\u7528\uFF0C\u4E0D\u80FD\u9762\u9762\u4FF1\u5230\uFF0C<strong>\u4E00\u4E9B\u4E0D\u5E38\u7528\u7684\u77E5\u8BC6\u70B9\u53EF\u4EE5\u76F4\u63A5 pass \u6389</strong>\u3002</p><p>\u6211\u8FD9\u91CC\u7ED9\u5927\u5BB6\u8D34\u4E00\u5F20\u300AJava \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF\u300B\u7684\u5BFC\u822A\u5730\u56FE\uFF0C\u5927\u7C7B\u5206\u4E3A Java \u6838\u5FC3\u3001Java \u4F01\u4E1A\u7EA7\u5F00\u53D1\u3001\u6570\u636E\u5E93\u3001\u8BA1\u7B97\u673A\u57FA\u7840\u3001\u6C42\u804C\u9762\u8BD5\u3001\u5B66\u4E60\u8D44\u6E90\u7B49\uFF0C\u57FA\u672C\u4E0A\u4F60\u8981\u7684 Java \u5B66\u4E60\u8D44\u6E90\uFF0C\u8FD9\u91CC\u90FD\u6709\uFF0C\u6CA1\u6709\u7684\uFF0C\u540E\u9762\u6211\u4E5F\u4F1A\u8865\u5145\u4E0A\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/yitiaolong-c80191bf-ab08-4a28-898f-ea7ffff3f966.png" alt=""></p><p>Java \u662F\u4E00\u95E8\u9762\u5411\u5BF9\u8C61\u7684\u7F16\u7A0B\u8BED\u8A00\uFF0C\u6240\u4EE5\u4E09\u5927\u7279\u6027\uFF1A\u5C01\u88C5\u3001\u7EE7\u627F\u3001\u591A\u6001\u662F\u5FC5\u987B\u8981\u638C\u63E1\u7684\uFF0C\u7136\u540E\u662F\u5F02\u5E38\u5904\u7406\u3001IO\u3001\u96C6\u5408\u3001\u5E76\u53D1\u7F16\u7A0B\u548C Java \u865A\u62DF\u673A\u3002\u53EA\u8981\u8FD9\u4E9B\u5185\u5BB9\u638C\u63E1\u4E86\uFF0C\u53EF\u4EE5\u8BF4 Java \u8BED\u8A00\u672C\u8EAB\u7684\u6838\u5FC3\u77E5\u8BC6\u5C31\u5168\u90E8\u638C\u63E1\u4E86\u3002</p><p>\u8FD9\u4E9B\u77E5\u8BC6\u8BE5\u600E\u4E48\u5B66\u5462\uFF1F\u5F53\u7136\u662F\u76F4\u63A5\u4E0A\u4E8C\u54E5\u7684 Java \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF\u4E86\uFF0C\u5185\u5BB9\u975E\u5E38\u7684\u5168\u9762\u548C\u786C\u6838\uFF0C\u622A\u56FE\u7ED9\u5927\u5BB6\u9274\u8D4F\u4E00\u4E0B\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/yitiaolong-a5436c4a-6464-4065-ae0d-50755c4184df.png" alt=""></p><p>\u8BB0\u4F4F\u6211\u4EEC\u7684\u7F51\u5740\uFF1A</p>',9),D={href:"https://tobebetterjavaer.com/home.html#java%E6%A0%B8%E5%BF%83",target:"_blank",rel:"noopener noreferrer"},q=t("https://tobebetterjavaer.com/"),I=e("p",null,"\u8FD9\u5176\u4E2D\u7684\u96BE\u70B9\u662F\u5E76\u53D1\u7F16\u7A0B\u548C JVM\uFF0C\u663E\u7136\u8FD9\u4E24\u90E8\u5206\u7684\u5185\u5BB9\u5B66\u8D77\u6765\u5E76\u4E0D\u5BB9\u6613\uFF0C\u4F46\u5374\u6700\u80FD\u8003\u9A8C\u4E00\u540D Java \u540E\u7AEF\u5DE5\u7A0B\u5E08\u7684\u529F\u5E95\u4E86\u3002",-1),L=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/yitiaolong-dac18663-f729-41d6-8253-2473b2174b9e.png",alt:"Java \u5E76\u53D1\u7F16\u7A0B\u6838\u5FC3\u77E5\u8BC6\u70B9"})],-1),A=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/yitiaolong-35df7e61-99c1-4efc-8f9f-702cc0f08904.png",alt:"JVM 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demo\uFF0C\u4EE5\u4FBF\u4EE5\u540E\u53EF\u4EE5\u5FEB\u901F\u5F97\u627E\u5F97\u5230\uFF0C\u5C24\u5176\u662F\u4E00\u4E9B\u5C0F\u5957\u8DEF\uFF0C\u4F1A\u5F88\u6709\u7528\uFF0C\u79EF\u7D2F\u5F97\u591A\u4E86\uFF0C\u53EF\u80FD\u5C31\u53D8\u6210\u4E86\u81EA\u5DF1\u7684\u5DE5\u5177\u5E93\u3002",-1),H=e("p",null,"\u4E00\u5B9A\u8981\u5584\u5F85\u81EA\u5DF1\u5199\u8FC7\u7684\u90A3\u4E9B\u5C0F demo\uFF0C\u5C24\u5176\u662F\u90A3\u4E9B\u5DF2\u7ECF\u8C03\u901A\u7684\uFF0C\u5343\u4E07\u4E0D\u8981\u6254\uFF0C\u6CA1\u51C6\u54EA\u4E00\u5929\u80FD\u5E2E\u4E0A\u5927\u5FD9\u3002\u4EE5\u6211\u7684\u7ECF\u9A8C\uFF0C\u5728\u5B66\u4E60\u7684\u8FC7\u7A0B\u4E2D\uFF0C\u5C3D\u7BA1\u67D0\u4E9B\u77E5\u8BC6\u70B9\u5728\u5F53\u65F6\u7406\u89E3\u7684\u591A\u4E48\u900F\u5F7B\uFF0C\u4F46\u53EA\u8981\u65F6\u95F4\u4E00\u957F\uFF0C\u6216\u8005\u6362\u4E2A\u5F00\u53D1\u73AF\u5883\uFF0C\u53EF\u80FD\u5C31\u5B8C\u86CB\uFF0C\u660E\u660E\u611F\u89C9\u4EE3\u7801\u662F\u4E00\u6837\u7684\uFF0C\u4F46\u5C31\u662F\u8FD0\u884C\u4E0D\u8D77\u6765\u3002\u5982\u679C\u624B\u5934\u6070\u597D\u6709\u8FD9\u4E48\u4E00\u4E2A demo\uFF0C\u6253\u5F00\u53C2\u8003\u4E00\u4E0B\uFF0C\u751A\u81F3\u62F7\u8D1D\u8FC7\u6765\u8BD5\u4E00\u4E0B\uFF0C\u95EE\u9898\u5C31\u4F1A\u8FCE\u5203\u800C\u89E3\u3002",-1),P=e("p",null,"\u5927\u90E8\u5206 Java \u7A0B\u5E8F\u5458\u90FD\u8981\u4ECE\u4E8B JavaWeb \u7684\u76F8\u5173\u5F00\u53D1\u5DE5\u4F5C\uFF0C\u8981\u5F00\u53D1 JavaWeb\uFF0C\u81EA\u7136\u5C31\u79BB\u4E0D\u5F00 Spring \u7684\u7CFB\u5217\u6846\u67B6\uFF08\u4E4B\u524D\u662F SSM\uFF0C\u73B0\u5728\u662F Spring Boot\uFF09\u3002 \u4F46\u4E0D\u7BA1\u600E\u4E48\u6F14\u53D8\uFF0CSpring \u7684\u6838\u5FC3\u6982\u5FF5\u4ECD\u7136\u662F IOC \u548C AOP\uFF0C\u4E5F\u5C31\u662F\u63A7\u5236\u53CD\u8F6C\u548C\u9762\u5411\u5207\u9762\u7F16\u7A0B\u3002",-1),W=t("\u5173\u4E8E Spring Boot \u7684\u5B9E\u6218\u5185\u5BB9\uFF0C\u4E8C\u54E5\u4E5F\u5728\u7D27\u9523\u5BC6\u9F13\u7684\u51C6\u5907"),G={href:"https://github.com/itwanger/coding-more",target:"_blank",rel:"noopener noreferrer"},z=t("\u7F16\u7A0B\u55B5"),N=t("\u8FD9\u4E2A\u5B9E\u6218\u9879\u76EE\uFF0C\u53EF\u4EE5\u5148\u7ED9\u5927\u5BB6\u5C55\u793A\u4E00\u4E0B\u540E\u7AEF\u7528\u5230\u7684\u6280\u672F\u6808\uFF0C\u90FD\u662F\u975E\u5E38\u4E3B\u6D41\u7684\u6280\u672F\u3002"),O=n('<p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhishixingqiu/readme-8.png" alt=""></p><p>\u5982\u679C\u8BF4\u4F60\u5DF2\u7ECF\u638C\u63E1\u4E86 Spring\u3001SpringMVC\u3001MyBatis\u3001Spring Boot \u7B49\u5185\u5BB9\uFF0C\u5C31\u6709\u80FD\u529B\u8FDB\u884C\u4E00\u4E9B\u771F\u6B63\u6709\u7528\u7684\u5E94\u7528\u9879\u76EE\u5F00\u53D1\u4E86\uFF0C\u6BD4\u5982\u8BF4\u5B66\u751F\u7BA1\u7406\u7CFB\u7EDF\u3001\u5546\u57CE\u7CFB\u7EDF\u3001\u535A\u5BA2\u7CFB\u7EDF\u3001\u79D2\u6740\u7CFB\u7EDF\u7B49\u7B49\u3002</p><p>\u5F53\u7136\u4E86\uFF0C\u8981\u505A\u5B8C\u6574\u7684 Java Web \u9879\u76EE\uFF0C\u524D\u7AEF\u7684\u4E00\u4E9B\u77E5\u8BC6\u80AF\u5B9A\u662F\u5C11\u4E0D\u4E86\u7684\uFF0C\u4F46\u4E0D\u80FD\u653E\u592A\u591A\u5FC3\u601D\uFF0C\u754C\u9762\u4E11\u70B9\u65E0\u6240\u8C13\uFF0C\u91CD\u70B9\u5728 Java \u540E\u7AEF\u4E0A\u9762\u3002</p><p>\u5B66\u4E60\u7F16\u7A0B\u5C31\u662F\u4E00\u4E2A\u7531\u6DF7\u6C8C\u5230\u6709\u5E8F\u7684\u8FC7\u7A0B\uFF0C\u5982\u679C\u78B0\u5230\u4E86\u7406\u89E3\u4E0D\u4E86\u7684\u77E5\u8BC6\uFF0C\u4E0D\u8981\u6000\u7591\u81EA\u5DF1\u9002\u4E0D\u9002\u5408\u7F16\u7A0B\uFF0C\u8DF3\u8FC7\u5C31\u884C\u4E86\uFF0C\u8FD9\u662F\u518D\u6B63\u5E38\u4E0D\u8FC7\u7684\u4E8B\u4E86\u2014\u2014\u5FC5\u987B\u62B1\u6709\u4E00\u9897\u8D8A\u632B\u8D8A\u52C7\u7684\u5FC3\u3002</p><h2 id="\u54EA\u4E9Bjava\u77E5\u8BC6\u4E0D\u9700\u8981\u518D\u5B66\u4E86" tabindex="-1"><a class="header-anchor" href="#\u54EA\u4E9Bjava\u77E5\u8BC6\u4E0D\u9700\u8981\u518D\u5B66\u4E86" aria-hidden="true">#</a> \u54EA\u4E9BJava\u77E5\u8BC6\u4E0D\u9700\u8981\u518D\u5B66\u4E86</h2><p>\u5F20\u65E0\u5FCC\u5728\u5B66\u592A\u6781\u62F3\u7684\u65F6\u5019\uFF0C\u592A\u5E08\u7236\u5F20\u4E09\u4E30\u5C31\u5BF9\u4ED6\u558A\uFF0C\u4E00\u5B9A\u8981\u628A\u4E4B\u524D\u6240\u5B66\u4E60\u7684\u6B66\u529F\u5168\u90E8\u5FD8\u6389\uFF0C<strong>\u5FD8\u5F97\u8D8A\u591A\u5C31\u4F1A\u5B66\u5F97\u8D8A\u5FEB</strong>\u3002\u540C\u6837\u7684\uFF0C\u81EA\u5B66 Java \u7684\u65F6\u5019\u4E00\u5B9A\u8981\u5148\u77E5\u9053\u54EA\u4E9B Java \u77E5\u8BC6\u4E0D\u9700\u8981\u518D\u5B66\u4E86\uFF0C\u6BD5\u7ADF\u6280\u672F\u7684\u66F4\u65B0\u8FED\u4EE3\u5C31\u597D\u50CF\u706B\u7BAD\u4E00\u6837\u5FEB\uFF0CJava \u7684\u4E00\u4E9B\u77E5\u8BC6\u70B9\u65E9\u5DF2\u7ECF\u8FC7\u65F6\u4E86\u3002\u5982\u679C\u4E0D\u61C2\u5F97\u65AD\u820D\u79BB\uFF0C\u90A3\u5B66\u8D77\u6765\u5C31\u4E0D\u514D\u592A\u75DB\u82E6\u4E86\u3002</p><p>1\uFF09AWT \u548C Swing</p><p>\u5DF2\u7ECF 2022 \u5E74\u4E86\uFF0C\u8C01\u8FD8\u4F1A\u7528 AWT \u548C Swing \u53BB\u5F00\u53D1\u684C\u9762\u5E94\u7528\u5462\uFF1F\u5B66\u597D\u540E\u7AEF\u5F00\u53D1\u5373\u53EF\uFF0C\u73B0\u5728\u662F\u79FB\u52A8\u4E92\u8054\u7F51\u65F6\u4EE3\uFF0C\u57FA\u672C\u4E0A\u90FD\u662F\u624B\u673AAPP\u3001\u5C0F\u7A0B\u5E8F\u3001Web \u7F51\u9875\u6765\u505A\u524D\u7AEF\u4E86\uFF0C\u53EF\u4EE5\u628A\u5B66\u4E60\u7684\u91CD\u5FC3\u653E\u5230 Spring Boot\u3001Spring Cloud\u3001Netty\u3001Dubbo\u3001Zookeeper\u3001Mysql\u4E0A\u3002</p><p>2\uFF09Applet</p><p>\u4F5C\u4E3A\u7F51\u9875\u63D2\u4EF6\u6280\u672F\uFF0CApplet \u538B\u6839\u5C31\u6CA1\u6D41\u884C\u8D77\u6765\u3002</p><p>3\uFF09XML</p><p>XML \u8FD8\u6CA1\u6709\u88AB\u6DD8\u6C70\uFF0C\u5E94\u7528\u7684\u5730\u65B9\u8FD8\u6709\u4E0D\u5C11\uFF0C\u6BD4\u5982\u8BF4 Maven \u7684 pom.xml \u6587\u4EF6\u91CC\u5C31\u8FD8\u5728\u7528\u3002\u4F46\u662F\u4F5C\u4E3A\u4E00\u79CD\u6570\u636E\u4F20\u8F93\u683C\u5F0F\uFF0C\u5B83\u6B63\u5728\u88AB JSON \u66FF\u4EE3\u3002\u81F3\u4E8E\u590D\u6742\u7684 XML \u64CD\u4F5C API\uFF08\u4F8B\u5982 XPath\uFF09\u5C31\u5B8C\u5168\u6CA1\u5FC5\u8981\u5B66\u4E60\u4E86\uFF0C\u5982\u679C\u771F\u7684\u7528\u5230\u4E86\uFF0C\u518D\u53BB\u8865\u4E5F\u4E0D\u8FDF\u3002</p><p>4\uFF09JDBC</p><p>\u6211\u4E2A\u4EBA\u4E0D\u5EFA\u8BAE\u518D\u5B66\u4E60\u504F\u5E95\u5C42\u7684 JDBC \u4E86\uFF0C\u5C24\u5176\u662F\u5BF9\u4E8E\u65F6\u95F4\u5B9D\u8D35\u7684\u81EA\u5B66\u7A0B\u5E8F\u5458\u6765\u8BF4\u3002\u4E0E\u5176\u82B1\u8FD9\u70B9\u65F6\u95F4\uFF0C\u4E0D\u5982\u628A\u7CBE\u529B\u6295\u5165\u5230 MyBatis \u7684\u5B66\u4E60\u4E0A\u3002\u5F53\u7136\u4E86\uFF0C\u5982\u679C\u771F\u7684\u6709\u65F6\u95F4\uFF0C\u771F\u7684\u60F3\u6253\u57FA\u7840\uFF0C\u7814\u7A76\u4E00\u4E0B\u4E5F\u65E0\u53EF\u539A\u975E\u3002</p><p>5\uFF09Struts</p><p>Struts \u662F\u65E9\u5E74\u4E00\u4E2A\u4F18\u79C0\u7684 MVC \u6846\u67B6\uFF0C\u5355\u4ECE\u6280\u672F\u7684\u89D2\u5EA6\u6765\u770B\uFF0C\u8FD8\u662F\u86EE\u4E0D\u9519\u7684\u3002\u4F46\u662F\u81EA\u4ECE\u6709\u4E86 SpringMVC \u540E\uFF0CStruts \u5C31\u88AB\u62CD\u6B7B\u5728\u6C99\u6EE9\u4E0A\u4E86\u3002</p><p>6\uFF09Hibernate</p><p>\u5728\u6211\u521A\u53C2\u52A0\u5DE5\u4F5C\u90A3\u4F1A\uFF082010 \u5E74\u7684\u65F6\u5019\uFF09\uFF0C\u6301\u4E45\u5C42\u6846\u67B6\u7528\u7684\u6B63\u662F Hibernate\u3002\u4F46\u65F6\u8FC7\u5883\u8FC1\uFF0CHibernate \u592A\u91CD\u91CF\u7EA7\u4E86\uFF0C\u5B66\u4E60\u6210\u672C\u592A\u9AD8\uFF0C\u53D6\u800C\u4EE3\u4E4B\u7684\u662F\u8F7B\u91CF\u7EA7\u7684 MyBatis\u3002\u73B0\u5728\u6709\u4E00\u79CD\u8BF4\u6CD5\u5C31\u662F\u8FD9\u79CD\u5BF9\u8C61\u5173\u7CFB\u6620\u5C04\u592A\u8FC7\u6B7B\u677F\u4E86\uFF0C\u4E0D\u5982\u76F4\u63A5\u5199 SQL \u6765\u5F97\u7075\u6D3B\uFF0C\u50CF\u6211\u5F88\u559C\u6B22\u7684\u4E00\u4E2A\u8F7B\u91CF\u7EA7\u6846\u67B6 JFinal \u5C31\u66F4\u504F\u91CD\u4E8E\u5728 Java \u4EE3\u7801\u4E2D\u5199 SQL\uFF0C\u800C\u4E0D\u50CF MyBatis \u548C Hibernate \u5728 xml \u6587\u4EF6\u4E2D\u5199\u3002</p><p>7\uFF09JSP</p><p>JSP \u5728\u5B9E\u9645\u5F00\u53D1\u4E2D\uFF0C\u4E3B\u8981\u662F\u4F5C\u4E3A MVC \u6A21\u578B\u4E2D\u7684V\uFF08View\uFF09\u5C42\u51FA\u73B0\u7684\u3002\u5B83\u672C\u6765\u662F\u4E3A Java \u540E\u7AEF\u7A0B\u5E8F\u5458\u5F00\u53D1\u524D\u7AEF\u754C\u9762\u800C\u751F\u7684\uFF0C\u4F46\u968F\u7740\u6280\u672F\u7684\u53D1\u5C55\uFF0C\u524D\u540E\u7AEF\u5206\u79BB\u7684\u6D41\u884C\uFF0CJSP \u7684\u751F\u547D\u5468\u671F\u5DF2\u7ECF\u5230\u5934\u4E86\u3002</p><p>8\uFF09Servlet</p><p>\u867D\u7136 SpringMVC \u7684\u5E95\u5C42\u662F\u4EE5 Servlet \u4E3A\u57FA\u7840\u7684\uFF0C\u662F JavaWeb \u5BB9\u5668\u7684\u57FA\u77F3\uFF0C\u4F46 Servlet \u7684\u786E\u5DF2\u7ECF\u8FC7\u65F6\u4E86\u3002\u5982\u679C\u540E\u9762\u6709\u7A7A\u4F59\u65F6\u95F4\u7684\u8BDD\uFF0C\u60F3\u94BB\u7684\u8BDD\u53EF\u4EE5\u94BB\u4E00\u4E0B\uFF0C\u5BF9\u670D\u52A1\u5668\u7AEF\u63A5\u6536\u8BF7\u6C42\u6570\u636E\u548C\u5411\u524D\u7AEF\u53D1\u9001\u54CD\u5E94\u6570\u636E\u65F6\u4F1A\u6709\u4E00\u4E9B\u5E2E\u52A9\u3002</p><p>\u6211\u8FD9\u6837\u7684\u8BF4\u6CD5\u53EF\u80FD\u4E0D\u591F\u53EF\u89C2\uFF0C\u4E0D\u591F\u987E\u53CA\u5E95\u5C42\u77E5\u8BC6\uFF0C\u4F46\u81EA\u5B66\u7684\u65F6\u95F4\u6210\u672C\u8FD8\u662F\u8981\u9002\u5F53\u63A7\u5236\u4E00\u4E0B\u3002<strong>\u603B\u4E4B\uFF0C\u6211\u4EEC\u5E94\u8BE5\u7701\u4E0B\u66F4\u591A\u7684\u65F6\u95F4\u53BB\u5B66\u4E60\u524D\u9762\u5C0F\u8282\u63D0\u5230\u7684\u91CD\u70B9\u77E5\u8BC6</strong>\uFF01</p><h2 id="\u5B66\u4E60java\u8FD8\u9700\u8981\u8865\u5145\u54EA\u4E9B\u77E5\u8BC6" tabindex="-1"><a class="header-anchor" href="#\u5B66\u4E60java\u8FD8\u9700\u8981\u8865\u5145\u54EA\u4E9B\u77E5\u8BC6" aria-hidden="true">#</a> \u5B66\u4E60Java\u8FD8\u9700\u8981\u8865\u5145\u54EA\u4E9B\u77E5\u8BC6</h2><h3 id="_1-\u6570\u636E\u7ED3\u6784\u4E0E\u7B97\u6CD5" tabindex="-1"><a class="header-anchor" href="#_1-\u6570\u636E\u7ED3\u6784\u4E0E\u7B97\u6CD5" aria-hidden="true">#</a> <strong>1\uFF09\u6570\u636E\u7ED3\u6784\u4E0E\u7B97\u6CD5</strong></h3><p>\u6BEB\u65E0\u7591\u95EE\uFF0C\u6570\u636E\u7ED3\u6784\u5BF9\u4E00\u540D\u7A0B\u5E8F\u5458\u6765\u8BF4\u975E\u5E38\u91CD\u8981\uFF0C\u8FD8\u662F\u90A3\u53E5\u8BDD<code>\u7A0B\u5E8F=\u6570\u636E\u7ED3\u6784+\u7B97\u6CD5</code>\uFF0C\u8FD9\u79CD\u8BF4\u6CD5\u65E0\u8BBA\u653E\u5728\u4EC0\u4E48\u65F6\u5019\u90FD\u662F\u6210\u7ACB\u7684\u3002</p><p>\u5927\u90E8\u5206\u7684<strong>\u6570\u636E\u7ED3\u6784</strong>\u8BFE\u7A0B\uFF0C\u5173\u6CE8\u7684\u91CD\u70B9\u90FD\u5728\u5982\u4F55\u4ECE\u6570\u5B66\u4E0A\u5B9E\u73B0\u4E00\u4E2A\u6570\u636E\u7ED3\u6784\uFF0C\u4F46\u5728\u5B9E\u9645\u5F00\u53D1\u4E2D\uFF0C\u5927\u90E8\u5206\u4E3B\u6D41\u8BED\u8A00\u90FD\u5DF2\u7ECF\u5185\u7F6E\u4E86\u5E38\u89C1\u7684\u6570\u636E\u7ED3\u6784\uFF0C\u6BD4\u5982\u8BF4 Java\u3002\u4E5F\u5C31\u662F\u8BF4\uFF0C\u5BF9\u4E8E\u5927\u90E8\u5206\u7A0B\u5E8F\u5458\u6765\u8BF4\uFF0C\u5B9E\u9645\u5F00\u53D1\u4E2D\uFF0C\u5F88\u96BE\u6709\u9700\u6C42\u8981\u4ECE\u96F6\u5F00\u59CB\u5B9E\u73B0\u4E00\u4E2A\u6570\u636E\u7ED3\u6784\u3002\u56E0\u6B64\u6211\u4EEC\u53EA\u9700\u8981\u505A\u5230\u4E0B\u9762\u51E0\u70B9\u3002</p><p>1\u3001\u719F\u6089\u5E38\u89C1\u6570\u636E\u7ED3\u6784\u7684\u6982\u5FF5\uFF0C\u6BD4\u5982\u8BF4\u6570\u7EC4\u3001\u5806\u6808\u3001\u94FE\u8868\u3001\u54C8\u5E0C\u8868\u7B49\u3002</p>',28),T=t("2\u3001\u4E86\u89E3\u5E38\u7528\u6570\u636E\u7ED3\u6784\u4E4B\u95F4\u7684\u5DEE\u5F02\uFF0C\u6BD4\u5982\u8BF4 "),F={href:"https://tobebetterjavaer.com/collection/list-war-2.html",target:"_blank",rel:"noopener noreferrer"},K=t("ArrayList \u548C LinkedList"),R=t("\u3002"),X=e("p",null,"3\u3001\u5173\u6CE8\u5E38\u7528\u6570\u636E\u7ED3\u6784\u7684\u5916\u56F4\u7B97\u6CD5\uFF0C\u6BD4\u5982\u8BF4\u5982\u4F55\u5BF9 List \u548C Map \u8FDB\u884C\u67E5\u627E\u3002",-1),Z=e("p",null,"4\u3001\u5173\u6CE8\u6570\u636E\u7ED3\u6784\u4F7F\u7528\u4E2D\u5BB9\u6613\u51FA\u9519\u7684\u5730\u65B9\uFF0C\u6BD4\u5982\u8BF4\u7EBF\u7A0B\u662F\u5426\u5B89\u5168\u7B49\u3002",-1),Q=e("p",null,"B \u7AD9\u4E0A\u6D59\u6C5F\u5927\u5B66\u7684\u4E00\u4E2A\u6570\u636E\u7ED3\u6784\u8BFE\u975E\u5E38\u4E0D\u9519\uFF0C\u5F88\u7CFB\u7EDF\u5F88\u7ECF\u5178\u3002",-1),U=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/yitiaolong-e2812c94-5945-41ad-adcd-4dbb02fae8d5.png",alt:""})],-1),Y=t("\u89C6\u9891\u5730\u5740\uFF1A"),$={href:"https://www.bilibili.com/video/BV1JW411i731",target:"_blank",rel:"noopener noreferrer"},ee=t("https://www.bilibili.com/video/BV1JW411i731"),te=n('<p>\u4EE5\u6211\u63A5\u89E6\u7684\u9886\u57DF\u6765\u8BF4\uFF0C\u5927\u90E8\u5206\u666E\u901A\u7684\u4E1A\u52A1\u7CFB\u7EDF\u90FD\u4E0D\u4F1A\u6D89\u53CA\u5230\u592A\u590D\u6742\u7684<strong>\u7B97\u6CD5</strong>\uFF0C\u56E0\u6B64\u6211\u6CA1\u6709\u5728\u7B97\u6CD5\u4E0A\u6295\u5165\u8FC7\u591A\u65F6\u95F4\u3002\u4F46\u5982\u679C\u4F60\u5C06\u6765\u8981\u4ECE\u4E8B\u4E00\u4E9B\u7279\u6B8A\u7684\u9886\u57DF\uFF0C\u5982\u679C\u7B97\u6CD5\u8DDF\u4E0D\u4E0A\uFF0C\u53EF\u4EE5\u8BF4\u662F\u201C\u5BF8\u6B65\u96BE\u884C\u201D\uFF0C\u6BD4\u5982\u8BF4\u56FE\u5F62\u5904\u7406\u9886\u57DF\uFF0C\u65E0\u8BBA\u662F\u56FE\u50CF\u7684\u53D8\u5316\u8FD8\u662F\u589E\u5F3A\uFF0C\u65E0\u4E00\u4F8B\u5916\u90FD\u8981\u7528\u5230\u77E9\u9635\u53D8\u6362\uFF0C\u56E0\u6B64\u5C31\u5FC5\u7136\u6D89\u53CA\u5230\u7EBF\u6027\u4EE3\u6570\u7684\u5185\u5BB9\uFF0C\u518D\u5F80\u6DF1\u5904\u5B66\u7684\u8BDD\uFF0C\u5FC5\u7136\u4F1A\u7275\u626F\u51FA\u66F4\u591A\u7684\u77E5\u8BC6\u3002</p><p>\u6240\u4EE5\u5B66\u4E60\u7B97\u6CD5\u8981\u89C6\u60C5\u51B5\u800C\u5B9A\uFF0C\u5982\u679C\u60F3\u8D70\u7B97\u6CD5\u5C97\uFF0C\u90A3\u4E48\u300A\u7B97\u6CD5\u7B2C4\u7248\u300B\u3001\u300A\u7B97\u6CD5\u5BFC\u8BBA\u300B\u3001\u300A\u6570\u5B66\u4E4B\u7F8E\u300B\u3001\u300A\u7F16\u7A0B\u73E0\u7391\u300B\u3001\u300A\u5251\u6307offer\u300B\u8FD9\u4E9B\u4E66\u90FD\u8981\u8010\u7740\u6027\u5B50\u5543\u4E00\u5543\u3002</p><h3 id="_2-\u8BBE\u8BA1\u6A21\u5F0F" tabindex="-1"><a class="header-anchor" href="#_2-\u8BBE\u8BA1\u6A21\u5F0F" aria-hidden="true">#</a> <strong>2\uFF09\u8BBE\u8BA1\u6A21\u5F0F</strong></h3><p>\u6211\u8BA4\u4E3A<strong>\u8BBE\u8BA1\u6A21\u5F0F</strong>\u662F\u521D\u4E2D\u7EA7\u7A0B\u5E8F\u5458\u8FC8\u5411\u9AD8\u7EA7\u7A0B\u5E8F\u5458\u7684\u5FC5\u7ECF\u4E4B\u8DEF\u3002\u6709\u4E0D\u5C11\u7A0B\u5E8F\u5458\uFF0C\u524D\u671F\u51B2\u52B2\u5341\u8DB3\uFF0C\u4F46\u540E\u7EE7\u4E4F\u529B\uFF0C\u90FD\u662F\u5403\u4E86\u8BBE\u8BA1\u6A21\u5F0F\u7684\u4E8F\u3002\u5728\u5DE5\u4F5C\u7684\u524D\u51E0\u5E74\uFF0C\u5927\u90E8\u5206\u7A0B\u5E8F\u5458\u90FD\u5904\u4E8E\u719F\u6089\u7F16\u7A0B\u8BED\u8A00\u7684\u9636\u6BB5\uFF0C\u4E5F\u5C31\u662F\u5904\u4E8E\u201C\u6280\u201D\u7684\u9636\u6BB5\uFF0C\u968F\u540E\u5C31\u8981\u8FDB\u5165\u201C\u672F\u201D\u7684\u9636\u6BB5\u4E86\u3002\u5728\u7F16\u7A0B\u9886\u57DF\uFF0C\u201C\u672F\u201D\u7684\u5178\u578B\u4EE3\u8868\u5C31\u662F\u201C\u8BBE\u8BA1\u6A21\u5F0F\u201D\u3002</p><p>\u5B66\u4E60\u8BBE\u8BA1\u6A21\u5F0F\u7684\u8BDD\uFF0C\u63A8\u8350\u597D\u670B\u53CB\u5C0F\u5085\u54E5\u7684\u300A\u91CD\u5B66 Java \u8BBE\u8BA1\u6A21\u5F0F\u300B\u3002\u6211\u4E4B\u524D\u63A8\u8350\u7684 Refactoring Guru \u7F51\u7AD9\uFF0C\u4E5F\u975E\u5E38\u7684 nice\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/yitiaolong-3b9ab6b9-67f2-4810-bb39-9e1f48ffe3da.png" alt=""></p>',6),ae=t("\u5728\u7EBF\u9605\u8BFB\u5730\u5740\uFF1A"),oe={href:"https://refactoring.guru",target:"_blank",rel:"noopener noreferrer"},ne=t("https://refactoring.guru"),re=n('<p>\u9700\u8981\u79BB\u7EBF\u7248\u7684\u5C0F\u4F19\u4F34\u8BF7\u957F\u6309\u8BC6\u522B/\u626B\u63CF\u4E0B\u65B9\u7684\u4E8C\u7EF4\u7801\u5173\u6CE8\u4F5C\u8005\u7684\u539F\u521B\u516C\u4F17\u53F7\u300C<strong>\u6C89\u9ED8\u738B\u4E8C</strong>\u300D\u56DE\u590D\u5173\u952E\u5B57\u300C<strong>\u8BBE\u8BA1\u6A21\u5F0F</strong>\u300D\u5C31\u53EF\u4EE5\u62C9\u53D6\u5230\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongzhonghao.png" alt="\u626B\u7801\u5173\u6CE8\u540E\u56DE\u590D\u300C\u8BBE\u8BA1\u6A21\u5F0F\u300D\u5173\u952E\u5B57"></p><h3 id="_3-jdk\u6E90\u7801" tabindex="-1"><a class="header-anchor" href="#_3-jdk\u6E90\u7801" aria-hidden="true">#</a> <strong>3\uFF09JDK\u6E90\u7801</strong></h3><p>\u9762\u8BD5\u7684\u65F6\u5019\uFF0C\u9762\u8BD5\u5B98\u90FD\u7279\u522B\u559C\u6B22\u95EE\u4E00\u4E9B\u6E90\u7801\u65B9\u9762\u7684\u77E5\u8BC6\uFF0C\u6BD4\u5982\u8BF4 HashMap \u7684\u4E00\u4E9B\u7ECF\u5178\u95EE\u9898\uFF1A</p><ul><li>\u52A0\u8F7D\u56E0\u5B50\u4E3A\u4EC0\u4E48\u662F 0.75\uFF1F</li><li>\u4E3A\u4EC0\u4E48\u94FE\u8868\u6539\u4E3A\u7EA2\u9ED1\u6811\u7684\u9608\u503C\u662F 8?</li><li>HashMap\u7684\u5E95\u5C42\u6570\u636E\u7ED3\u6784\u662F\u4EC0\u4E48\uFF1F</li><li>\u89E3\u51B3hash\u51B2\u7A81\u7684\u529E\u6CD5\u6709\u54EA\u4E9B\uFF1F</li><li>HashMap\u6570\u7EC4\u7684\u957F\u5EA6\u4E3A\u4EC0\u4E48\u662F 2 \u7684\u5E42\u6B21\u65B9\uFF1F</li><li>HashMap \u7684\u6269\u5BB9\u65B9\u5F0F\uFF1F</li></ul><p>\u8FD9\u4E9B\u95EE\u9898\u53EA\u6709\u901A\u8FC7\u6E90\u7801\u624D\u80FD\u5F97\u51FA\u6BD4\u8F83\u51C6\u786E\u7684\u56DE\u7B54\uFF0C\u5BF9\u5427\uFF1F</p><p>\u6709\u4E2A\u540C\u5B66\u8BF4\u8FC7\u4E00\u53E5\u8BDD\uFF0C\u7ED9\u6211\u7684\u5370\u8C61\u7279\u522B\u6DF1\u523B\uFF0C\u5C31\u662F\u201C\u6709\u5565\u89E3\u51B3\u4E0D\u4E86\u7684\uFF1F\u53EA\u8981\u4F60\u80AF\u9605\u8BFB\u6E90\u7801\u3002\u201D\u7F8A\u54E5\u51FA\u8FC7\u4E00\u4E2A\u89C6\u9891\uFF0C\u8BE6\u7EC6\u5730\u4ECB\u7ECD\u4E86\u5982\u4F55\u9605\u8BFB JDK \u6E90\u7801\uFF0C\u63A8\u8350\u7ED9\u5927\u5BB6\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/yitiaolong-130bcb8a-38bb-448f-8dc1-4e2af22153d2.png" alt=""></p>',8),ie=t("\u89C6\u9891\u5730\u5740\uFF1A"),se={href:"https://www.bilibili.com/video/BV1V7411U78L",target:"_blank",rel:"noopener noreferrer"},pe=t("https://www.bilibili.com/video/BV1V7411U78L"),le=e("h3",{id:"_4-\u64CD\u4F5C\u7CFB\u7EDF\u3001\u8BA1\u7B97\u673A\u7EC4\u6210\u539F\u7406\u548C\u8BA1\u7B97\u673A\u7F51\u7EDC",tabindex:"-1"},[e("a",{class:"header-anchor",href:"#_4-\u64CD\u4F5C\u7CFB\u7EDF\u3001\u8BA1\u7B97\u673A\u7EC4\u6210\u539F\u7406\u548C\u8BA1\u7B97\u673A\u7F51\u7EDC","aria-hidden":"true"},"#"),t(),e("strong",null,"4\uFF09\u64CD\u4F5C\u7CFB\u7EDF\u3001\u8BA1\u7B97\u673A\u7EC4\u6210\u539F\u7406\u548C\u8BA1\u7B97\u673A\u7F51\u7EDC")],-1),ce=e("p",null,"\u8FD9\u4E09\u95E8\u8BFE\u7684\u91CD\u8981\u6027\u5C31\u4E0D\u7528\u6211\u591A\u8BF4\u4E86\uFF0C\u5982\u679C\u6709\u65F6\u95F4\u6709\u7CBE\u529B\uFF0C\u63A8\u8350\u6309\u7167\u4E0B\u9762\u7684\u8DEF\u7EBF\u53BB\u5B66\u4E60\u3002",-1),he=e("p",null,"\u63A8\u8350\u54C8\u5DE5\u5927\u7684\u300A\u64CD\u4F5C\u7CFB\u7EDF\u300B\u5B9E\u9A8C\u8BFE\uFF0C\u5305\u62EC\u64CD\u4F5C\u7CFB\u7EDF\u57FA\u7840\u7BC7\u3001\u64CD\u4F5C\u7CFB\u7EDF\u4E4B\u8FDB\u7A0B\u4E0E\u7EBF\u7A0B\u3001\u64CD\u4F5C\u7CFB\u7EDF\u4E4B\u5185\u5B58\u7BA1\u7406\u3001\u64CD\u4F5C\u7CFB\u7EDF\u4E4B\u5916\u8BBE\u4E0E\u6587\u4EF6\u7CFB\u7EDF",-1),de=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/yitiaolong-f5e91f0d-4b30-4693-beab-b879bac237b4.png",alt:""})],-1),be=t("\u89C6\u9891\u5730\u5740\uFF1A"),_e={href:"https://www.bilibili.com/video/BV1js411b7vg",target:"_blank",rel:"noopener noreferrer"},ge=t("https://www.bilibili.com/video/BV1js411b7vg"),ve=e("p",null,"\u5982\u679C\u60F3\u6DF1\u5165\u5B66\u4E60\u8BA1\u7B97\u673A\u7EC4\u6210\u539F\u7406\u7684\u8BDD\uFF0C\u63A8\u8350\u5317\u4EAC\u5927\u5B66\u7684\u300A\u8BA1\u7B97\u673A\u7EC4\u6210\u300B\u516C\u5F00\u8BFE\uFF0C\u6574\u4F53\u8BC4\u4EF7\u975E\u5E38\u9AD8\u3002",-1),ue=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/yitiaolong-6cc5a0d4-7a06-4aca-a9b0-2e8b270d36ba.png",alt:""})],-1),me=t("\u89C6\u9891\u5730\u5740\uFF1A"),fe={href:"https://www.coursera.org/learn/jisuanji-zucheng",target:"_blank",rel:"noopener noreferrer"},je=t("https://www.coursera.org/learn/jisuanji-zucheng"),Je=e("p",null,"\u8BA1\u7B97\u673A\u7F51\u7EDC\u65B9\u9762\u7684\u89C6\u9891\u6211\u63A8\u8350\u6E56\u79D1\u5927\u6559\u4E66\u5320\u7684\u300A\u8BA1\u7B97\u673A\u7F51\u7EDC\u5FAE\u8BFE\u5802\u300B\uFF0C\u5236\u4F5C\u5F97\u975E\u5E38\u7528\u5FC3\uFF0C\u662F\u4E00\u90E8\u4E0D\u53EF\u591A\u5F97\u7684\u4F73\u4F5C\u3002",-1),xe=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/yitiaolong-0686fbbf-723e-4a0b-8082-3b3577050758.png",alt:""})],-1),we=t("\u89C6\u9891\u5730\u5740\uFF1A"),ke={href:"https://www.bilibili.com/video/BV1c4411d7jb",target:"_blank",rel:"noopener noreferrer"},Be=t("https://www.bilibili.com/video/BV1c4411d7jb"),Se=n('<h3 id="_5-\u9879\u76EE\u7BA1\u7406\u4E0E\u67B6\u6784" tabindex="-1"><a class="header-anchor" href="#_5-\u9879\u76EE\u7BA1\u7406\u4E0E\u67B6\u6784" aria-hidden="true">#</a> 5\uFF09\u9879\u76EE\u7BA1\u7406\u4E0E\u67B6\u6784</h3><p>\u5B9E\u73B0\u4E00\u4E2A\u8F6F\u4EF6\u7CFB\u7EDF\u7684\u8FC7\u7A0B\uFF0C\u4E0D\u4EC5\u53EA\u6709\u7F16\u7801\uFF0C\u8FD8\u6D89\u53CA\u5230\u9879\u76EE\u5B89\u6392\uFF0C\u56E2\u961F\u534F\u8C03\u7B49\u4E00\u7CFB\u5217\u975E\u6280\u672F\u56E0\u7D20\uFF0C\u5982\u679C\u60F3\u4ECE\u4E00\u540D\u7A0B\u5E8F\u5458\u8D70\u5411\u7BA1\u7406\u5C97\uFF0C\u6210\u4E3A team leader \u6216\u8005\u5F00\u53D1\u7ECF\u7406\uFF0C\u8F6F\u4EF6\u5DE5\u7A0B\u65B9\u9762\u7684\u77E5\u8BC6\u5C31\u5FC5\u987B\u5F97\u8DDF\u5F97\u4E0A\u3002</p><p>\u63A8\u8350\u4E09\u672C\u4E66\uFF1A\u300A\u6784\u5EFA\u4E4B\u6CD5\u300B\u3001\u300A\u4EBA\u6708\u795E\u8BDD\u300B\u548C\u300A\u4EBA\u4EF6\u300B\uFF0C\u867D\u7136\u6709\u4E86\u5C81\u6708\u7684\u75D5\u8FF9\uFF0C\u4F46\u4F9D\u7136\u503C\u5F97\u6DF1\u8BFB\u3002\u5F53\u7136\uFF0C\u5173\u4E8E\u8F6F\u4EF6\u5DE5\u7A0B\uFF0C\u6700\u597D\u7684\u5B66\u4E60\u65B9\u6CD5\u662F\u89C2\u5BDF\uFF0C\u89C2\u5BDF\u4F60\u6240\u5728\u7684\u56E2\u961F\u662F\u5982\u4F55\u5904\u7406\u5DE5\u7A0B\u95EE\u9898\u7684\uFF0C\u7136\u540E\u601D\u8003\uFF0C\u6700\u7EC8\u5F62\u6210\u81EA\u5DF1\u7684\u65B9\u6CD5\u89C2\u3002</p><p>\u8981\u60F3\u5199\u51FA\u4E00\u4E2A\u597D\u800C\u7F8E\u7684\u7A0B\u5E8F\uFF0C\u9700\u8981\u7ECF\u8FC7\u4E09\u4E2A\u9636\u6BB5\u3002</p><p>\u7B2C\u4E00\u9636\u6BB5\uFF0C<strong>\u6709\u624E\u5B9E\u7684\u57FA\u672C\u529F</strong>\uFF0C\u7B80\u5355\u70B9\u8BF4\uFF0C\u5C31\u662F\u8981\u505A\u5230\u8BED\u6CD5\u719F\u7EC3\u3001\u6846\u67B6\u719F\u7EC3\uFF0C\u6210\u4E3A\u4E00\u540D\u80FD\u591F\u5B8C\u6210\u5F00\u53D1\u4EFB\u52A1\u7684\u201C\u7801\u519C\u201D\u3002</p><p>\u7B2C\u4E8C\u9636\u6BB5\uFF0C\u4ECE\u201C\u7801\u519C\u201D\u5230\u201C\u5DE5\u7A0B\u5E08\u201D\uFF0C\u5728\u5C40\u90E8\u4E0A\uFF0C\u4E0D\u4EC5\u8981\u80FD\u591F\u5B9E\u73B0\u529F\u80FD\uFF0C\u8FD8\u80FD\u5173\u6CE8\u529F\u80FD\u4E4B\u5916\u7684\u7EF4\u5EA6\uFF0C\u6BD4\u5982\u5065\u58EE\u6027\u3001\u4F4E\u8026\u5408\u3001\u53EF\u6269\u5C55\u7B49\u6307\u6807\u3002</p><p>\u7B2C\u4E09\u9636\u6BB5\uFF0C\u4ECE\u201C\u5DE5\u7A0B\u5E08\u201D\u5230\u201C\u67B6\u6784\u5E08\u201D\uFF0C\u4E0D\u4EC5\u5728\u5C40\u90E8\u4E0A\u8FFD\u6C42\u4E00\u4E2A\u6A21\u5757\u7684\u597D\u574F\uFF0C\u800C\u4E14\u8FD8\u8981\u4ECE\u6574\u4E2A\u7CFB\u7EDF\u5C42\u9762\u53BB\u638C\u63A7\uFF0C\u5408\u7406\u5B89\u6392\u8D44\u6E90\u7684\u4F18\u5148\u7EA7\uFF0C\u4FDD\u8BC1\u6574\u4E2A\u7CFB\u7EDF\u4E0D\u4F1A\u51FA\u73B0\u8150\u8D25\u7B49\u7B49\u3002</p><p>\u8981\u60F3\u6210\u4E3A\u4E00\u540D\u4F18\u79C0\u7684\u67B6\u6784\u5E08\uFF0C\u9664\u4E86\u81EA\u8EAB\u7684\u52AA\u529B\uFF0C\u4E5F\u9700\u8981\u4E00\u70B9\u70B9\u8FD0\u6C14\uFF0C\u4F46\u9760\u8BFB\u4E66\u53EF\u80FD\u4E0D\u591F\uFF0C\u4F46\u8FD9\u4E9B\u7ECF\u5178\u4E66\u7C4D\u8FD8\u662F\u8981\u9605\u8BFB\u7684\uFF0C\u80FD\u7ED9\u65E5\u5E38\u7684\u5DE5\u4F5C\u5E26\u6765\u5DE8\u5927\u7684\u5E2E\u52A9\u3002</p><ul><li>\u300A\u4EE3\u7801\u5927\u5168\u300B</li><li>\u300A\u91CD\u6784\uFF1A\u6539\u5584\u65E2\u6709\u4EE3\u7801\u7684\u8BBE\u8BA1\u300B</li><li>\u300A\u8BBE\u8BA1\u539F\u672C\u300B</li><li>\u300A\u5927\u578B\u7F51\u7AD9\u6280\u672F\u67B6\u6784\u6838\u5FC3\u539F\u7406\u4E0E\u6848\u4F8B\u5206\u6790\u300B</li></ul><h2 id="\u6700\u540E" tabindex="-1"><a class="header-anchor" href="#\u6700\u540E" aria-hidden="true">#</a> \u6700\u540E</h2><p>\u5B66\u4E60\u7684\u8FC7\u7A0B\uFF0C\u5C31\u597D\u50CF\u767B\u5C71\u4E00\u6837\uFF0C\u5927\u6982\u6709 80% \u7684\u4EBA\u5728\u8FD9\u4E2A\u8FC7\u7A0B\u4E2D\u4F1A\u6389\u961F\u3002\u90A3\u4E48\u8BF7\u76F8\u4FE1\u6211\uFF0C\u53EA\u8981\u76EE\u6807\u660E\u786E\uFF0C\u52AA\u529B\u52A0\u4E0A\u575A\u6301\uFF0C\u518D\u52A0\u4E0A\u4E00\u70B9\u70B9\u597D\u8FD0\u6C14\uFF0C\u4F60\u5C31\u80FD\u767B\u9876\uFF01</p><p>\u6700\u540E\u8BF4\u4E00\u53E5\u54C8\uFF0C\u5927\u5BB6\u5B66\u4E60 Java\uFF0C\u662F\u4E3A\u4E86\u4EC0\u4E48\uFF0C\u6211\u60F3\u5927\u591A\u6570\u4E0D\u662F\u4E3A\u4E86\u5174\u8DA3\uFF0C\u662F\u5427\uFF1F\u662F\u4E3A\u4E86\u627E\u5DE5\u4F5C\uFF0C\u90A3\u4E48\u7EC8\u6781\u7684\u4E00\u6B65\uFF0C\u6211\u4EEC\u9700\u8981\u5728\u627E\u5DE5\u4F5C\u4E4B\u524D\u5237\u4E00\u6CE2\u9762\u8BD5\u9898\uFF0C\u7136\u540E\u627E\u5DE5\u4F5C\u7684\u673A\u4F1A\u4E5F\u4F1A\u63D0\u5347\u5F88\u591A\u3002Java \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF\u4E0A\u4E5F\u4E3A\u5927\u5BB6\u7CBE\u5FC3\u51C6\u5907\u4E86\u9762\u6E23\u9006\u88AD\u7BC7\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/yitiaolong-314e94ce-aa9d-4f09-831b-d1395c4fc07a.png" alt=""></p><p>\u901A\u8FC7\u4E0A\u9762\u8FD9\u5E45\u56FE\u5C31\u80FD\u611F\u53D7\u5F97\u5230\uFF0C\u975E\u5E38\u5168\u9762\uFF0C\u975E\u5E38\u7CBE\u5F69\u3002</p><blockquote><p>\u5B66\u4E60\u5730\u5740\uFF1A<a href="/sidebar/sanfene/nixi">\u9762\u6E23\u9006\u88AD</a></p></blockquote><p>\u8877\u5FC3\u7684\u5E0C\u671B\uFF0C\u5927\u5BB6\u90FD\u80FD\u5728\u5B66\u4E60 Java \u7684\u8FD9\u6761\u8DEF\u4E0A\u5FEB\u4E50\u4E00\u4E9B\uFF0C\u7EAF\u7CB9\u4E00\u4E9B\uFF0C\u5C11\u542C\u5C11\u770B\u4E00\u4E9B\u90A3\u4E9B\u7126\u8651\u6587\uFF0C\u4EC0\u4E48 35 \u5C81\uFF0C\u4EC0\u4E48\u5B66\u5386\u6B67\u89C6\uFF0C\u6C89\u4E0B\u5FC3\u6765\uFF0C\u591A\u5B66\u4E60\u4E00\u70B9\u77E5\u8BC6\uFF0C\u8BA9\u81EA\u5DF1\u53D8\u5F3A\u4E00\u70B9\uFF0C\u6BD4\u4EC0\u4E48\u90FD\u597D\uFF01</p><p>\u53E6\u5916\uFF0C\u9700\u8981 Java \u5B66\u4E60\u8D44\u6599\u7684\u8BDD\uFF0C\u53EF\u4EE5\u76F4\u63A5\u6233\u6211\u6574\u7406\u7684\u8FD9\u4E2A 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\u4E2D\u867D\u7136\u5254\u9664\u4E86\u6307\u9488\u8FD9\u79CD\u70E6\u4EBA\u7684\u4E1C\u897F\uFF0C\u4F46\u8BF4\u767D\u4E86\uFF0C\u5F15\u7528\u5176\u5B9E\u548C\u6307\u9488\u5DEE\u4E0D\u591A\uFF0C\u7406\u89E3\u4E86 C \u8BED\u8A00\u4E2D\u7684\u6307\u9488\uFF0C\u5C31\u80FD\u5F88\u597D\u7684\u7406\u89E3 Java \u4E2D\u7684\u5F15\u7528\u3002</p><p>\u5F53\u7136\u4E86\uFF0C\u7531\u4E8E C \u8BED\u8A00\u7684\u62BD\u8C61\u7A0B\u5EA6\u66F4\u9AD8\uFF0C\u5B66\u8D77\u6765\u4E5F\u9700\u8981\u82B1\u8D39\u4E00\u756A\u529F\u592B\u3002\u5BF9\u4E8E\u79D1\u73ED\u7684\u521D\u5B66\u8005\u6765\u8BF4\uFF0C\u6211\u63A8\u8350\u7FC1\u607A\u6559\u6388\u7684 C \u8BED\u8A00\u7A0B\u5E8F\u8BBE\u8BA1\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/yitiaolong-82aefde9-8a3f-4f28-aad5-02e39a6b9d4b.png" alt=""></p>',11),h=t("B \u7AD9\u5730\u5740\uFF1A"),d={href:"https://www.bilibili.com/video/BV19W411B7w1",target:"_blank",rel:"noopener noreferrer"},b=t("https://www.bilibili.com/video/BV19W411B7w1"),_=n('<p>\u559C\u6B22\u770B\u4E66\u7684\u540C\u5B66\u6211\u53EA\u63A8\u8350\u4E00\u672C\uFF0C\u300A<strong>\u962E\u4E00\u5CF0\u8001\u5E08\u7684 C\u8BED\u8A00\u5165\u95E8\u6559\u7A0B</strong>\u300B\uFF0C\u6211\u7B2C\u4E00\u65F6\u95F4\u5C31\u62DC\u8BFB\u4E86\u4E00\u904D\uFF0C\u53D7\u76CA\u532A\u6D45\uFF01\u53EF\u4EE5\u8BF4\u76EE\u524D\u6211\u89C1\u5230\u7684\u6700\u597D\u7684 C\u8BED\u8A00\u5165\u95E8\u6559\u7A0B\u4E86\uFF0C\u6CA1\u6709\u4E4B\u4E00\uFF01</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/yitiaolong-3507eb06-8424-4b8e-b20d-046268508c9d.png" alt=""></p><p>\u6211\u7B2C\u4E00\u65F6\u95F4\u5C31\u6574\u7406\u4E86\u4E00\u4EFD PDF \u7248\u7684\uFF0C\u9700\u8981\u7684\u5C0F\u4F19\u4F34\u53EF\u4EE5\u957F\u6309\u8BC6\u522B/\u626B\u63CF\u4E0B\u65B9\u4E8C\u7EF4\u7801\uFF0C\u5173\u6CE8\u540E\u56DE\u590D \u300C<strong>\u962E\u4E00\u5CF0</strong>\u300D \u4E0B\u8F7D\u8FD9\u4EFD PDF \u5427\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongzhonghao.png" alt="\u626B\u7801\u5173\u6CE8\u540E\u56DE\u590D\u300C\u962E\u4E00\u5CF0\u300D\u5173\u952E\u5B57"></p><p>\u5728\u5B66\u4E60\u7684\u8FC7\u7A0B\u4E2D\u5207\u8BB0\u4E00\u70B9\uFF0C\u5C31\u662F\u4E00\u5B9A\u8981\u591A\u7EC3\u591A\u7EC3\u591A\u7EC3\uFF0C\u8FD9\u4E00\u70B9\u4E0D\u4EC5\u9002\u5408\u5B66\u4E60 C\u8BED\u8A00\uFF0C\u4E5F\u9002\u5408\u5B66\u4E60 Java \u8BED\u8A00\u3002\u6709\u53E5\u8BDD\u8BF4\u5F97\u597D\u5440\uFF0C<strong>\u770B\u61C2\u4E86+\u4E0A\u4E07\u884C\u4EE3\u7801=\u5B66\u4F1A\u4E86</strong>\u3002\u65E0\u8BBA\u662F\u770B\u89C6\u9891\u5B66\u4E60\uFF0C\u8FD8\u662F\u770B\u4E66\u5B66\u4E60\uFF0C\u6700\u6015\u7684\u5C31\u662F\u773C\u9AD8\u624B\u4F4E\uFF0C\u4EE5\u4E3A\u81EA\u5DF1\u770B\u61C2\u4E86\uFF0C\u5B9E\u9645\u4E0A\u5462\uFF0C\u79BB\u5B66\u4F1A\u4E86\u8FD8\u5DEE\u4E0A\u4E07\u884C\u4EE3\u7801\u3002</p><p>\u5BF9\u4E8E\u975E\u79D1\u73ED\u7684\u540C\u5B66\u6765\u8BF4\uFF0C\u5982\u679C\u65F6\u95F4\u6BD4\u8F83\u7D27\u8FEB\u7684\u8BDD\uFF0C\u53EF\u4EE5\u76F4\u63A5\u4E0A\u624B Java\uFF0C\u6211\u89C9\u5F97\u53EA\u8981\u5B66\u4E60\u8D44\u6599\u9009\u7684\u597D\uFF0C\u4E5F\u662F\u5B8C\u5168\u6CA1\u6709\u95EE\u9898\u7684\u3002</p><h2 id="\u5B66\u4E60java\u4E4B\u524D\u8981\u5B89\u88C5\u7684\u8F6F\u4EF6" tabindex="-1"><a class="header-anchor" href="#\u5B66\u4E60java\u4E4B\u524D\u8981\u5B89\u88C5\u7684\u8F6F\u4EF6" aria-hidden="true">#</a> \u5B66\u4E60Java\u4E4B\u524D\u8981\u5B89\u88C5\u7684\u8F6F\u4EF6</h2><p>\u5DE5\u6B32\u5584\u5176\u4E8B\u5FC5\u5148\u5229\u5176\u5668\uFF0C\u6218\u6597\u4E4B\u524D\u6211\u4EEC\u8981\u5148\u914D\u5907\u597D\u6B66\u5668\u3002</p><p>JDK \u662F Java Development ToolKit \u7684\u7B80\u79F0\uFF0C\u4E5F\u5C31\u662F Java \u5F00\u53D1\u5DE5\u5177\u5305\u3002JDK \u662F\u6574\u4E2A Java \u7684\u6838\u5FC3\uFF0C\u5305\u62EC Java \u8FD0\u884C\u73AF\u5883\uFF08Java Runtime Envirnment\uFF0C\u7B80\u79F0 JRE\uFF09\uFF0CJava \u5DE5\u5177\uFF08\u6BD4\u5982 javac\u3001java\u3001javap \u7B49\u7B49\uFF09\uFF0C\u4EE5\u53CA Java \u57FA\u7840\u7C7B\u5E93\uFF08\u6BD4\u5982 rt.jar\uFF09\uFF0C\u5B66\u4E60 Java \u4E4B\u524D\u5FC5\u987B\u8981\u5B89\u88C5\u3002</p><p>\u5DF2\u7ECF 2022 \u5E74\u4E86\uFF0C\u771F\u6CA1\u5FC5\u8981\u5728\u8BB0\u4E8B\u672C\u4E0A\u6572\u4EE3\u7801\u4E86\u3002\u53CD\u6B63\u6211\u9047\u5230\u8FC7\u592A\u591A\u7684\u8BFE\u7A0B\uFF0C\u5305\u62EC\u6211\u4E0A\u5927\u5B66\u65F6\u5019\u7684\u8001\u5E08\uFF0C\u90FD\u4E00\u800C\u518D\u518D\u800C\u4E09\u7684\u5F3A\u8C03\uFF0C\u4E00\u5B9A\u8981\u7528\u8BB0\u4E8B\u672C\u6572\u51FA\u6765\u7B2C\u4E00\u4E2A\u7A0B\u5E8F\uFF0C\u5E76\u4E14\u5728\u547D\u4EE4\u884C\u91CC\u6210\u529F\u8FD0\u884C\u8D77\u6765\u3002</p><p>\u8FD9\u4E48\u591A\u5E74\u4E0B\u6765\uFF0C\u6211\u89C9\u5F97\u8FD9\u4E2A\u5EFA\u8BAE\u771F\u7684\u662F\u7CDF\u7CD5\u6781\u4E86\u3002\u8BB0\u4E8B\u672C\u548C\u547D\u4EE4\u884C\uFF0C\u600E\u4E48\u80FD\u8BA9\u521D\u5B66\u8005\u4E0A\u624B\u5462\uFF1F\u6700\u8D77\u7801\u4E5F\u5F97\u662F\u4E2A\u8001\u6C5F\u6E56\u624D\u884C\u554A\uFF01\u5F53\u5E74\u6211\u5C31\u5DEE\u70B9\u88AB\u8BB0\u4E8B\u672C\u548C\u547D\u4EE4\u884C\u529D\u9000\u3002</p><p>Intellij IDEA\uFF0C\u4E0D\u7528\u8BF4\uFF0C\u662F\u7F16\u5199 Java \u7A0B\u5E8F\u7684\u6700\u4F73 IDE\uFF0C\u521D\u5B66\u8005\u9009\u62E9\u793E\u533A\u7248\u5C31\u5B8C\u5168\u591F\u7528\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/yitiaolong-3fb56f9d-942a-4439-8bab-0f19bd59ef58.png" alt=""></p><p>\u521D\u6B21\u4F7F\u7528\u7684\u8BDD\uFF0C\u5EFA\u8BAE\u9605\u8BFB\u4E00\u4E0B\u300AIntelliJ IDEA \u7B80\u4F53\u4E2D\u6587\u4E13\u9898\u6559\u7A0B\u300B\uFF0CGitHub \u4E0A\u5DF2\u5F00\u6E90\u3002</p>',14),g=t("\u5730\u5740\uFF1A"),v={href:"https://github.com/judasn/IntelliJ-IDEA-Tutorial",target:"_blank",rel:"noopener noreferrer"},u=t("https://github.com/judasn/IntelliJ-IDEA-Tutorial"),m=e("p",null,"Maven \u662F\u4E00\u4E2A\u9879\u76EE\u7BA1\u7406\u548C\u81EA\u52A8\u5316\u6784\u5EFA\u5DE5\u5177\uFF0C\u57FA\u4E8E\u9879\u76EE\u5BF9\u8C61\u6A21\u578B\uFF08POM\uFF09\u7684\u6982\u5FF5\uFF0C\u53EF\u4EE5\u7BA1\u7406\u9879\u76EE\u7684\u6784\u5EFA\u3001\u62A5\u544A\u4EE5\u53CA\u6587\u6863\u3002\u4F5C\u4E3A Apache \u7EC4\u7EC7\u4E2D\u7684\u4E00\u4E2A\u9887\u4E3A\u6210\u529F\u7684\u5F00\u6E90\u9879\u76EE\uFF0CMaven \u4E3B\u8981\u670D\u52A1\u4E8E\u57FA\u4E8E Java \u7684\u9879\u76EE\u6784\u5EFA\u3001\u4F9D\u8D56\u7BA1\u7406\u548C\u9879\u76EE\u4FE1\u606F\u7BA1\u7406\u3002\u6709\u4E86 Maven \u4EE5\u540E\uFF0C\u7B2C\u4E09\u65B9\u7C7B\u5E93\u7BA1\u7406\u8D77\u6765\u5C31\u8212\u670D\u591A\u4E86\u3002",-1),f=t("\u5B89\u88C5\u548C\u914D\u7F6E\u6559\u7A0B\u76F4\u63A5\u770B\u6211\u5199\u8FC7\u7684\u8FD9\u7BC7\u6587\u7AE0"),j={href:"https://mp.weixin.qq.com/s/3umZOaI4l0EIZ5RgtEDchw",target:"_blank",rel:"noopener noreferrer"},J=t("10\u5206\u949F\uFF0C\u638C\u63E1\u9879\u76EE\u6784\u5EFA\u795E\u5668Maven"),x=t("\u5C31\u597D\u4E86\u3002"),w=t("\u53E6\u5916\uFF0C\u6211\u63A8\u8350\u5927\u5BB6\u4F7F\u7528 GitHub/\u7801\u4E91\u6765\u4F5C\u4E3A\u79C1\u6709\u7684\u4EE3\u7801\u4ED3\u5E93\uFF0C\u7279\u522B\u65B9\u4FBF\uFF0C\u514D\u8D39\u8FD8\u53EF\u4EE5\u4E91\u540C\u6B65\u3002\u8FD8\u4E0D\u592A\u719F\u6089"),k={href:"https://tobebetterjavaer.com/git/git-qiyuan.html",target:"_blank",rel:"noopener noreferrer"},B=t("Git \u547D\u4EE4"),S=t("\u7684\u8BDD\uFF0C\u53EF\u4EE5\u4E0B\u8F7D"),M={href:"https://desktop.github.com/",target:"_blank",rel:"noopener noreferrer"},y=t("GitHub \u684C\u9762\u7248"),V=t("\u6765\u50BB\u74DC\u5F0F\u5730\u64CD\u4F5C\u3002"),C=n('<p>\u8FD9\u4E00\u5957\u8F6F\u4EF6\u5B89\u88C5\u5B8C\u6210\u540E\uFF0C\u57FA\u672C\u4E0A\u5F00\u53D1 Java \u7684\u5FC5\u5907\u5DE5\u5177\u5C31\u9F50\u6D3B\u4E86\u3002\u63A5\u4E0B\u6765\uFF0C\u5C31\u53EF\u4EE5\u653E\u5FC3\u5927\u80C6\u7684\u8FDB\u5165 Java \u7684\u4E16\u754C\u4E86\u3002</p><h2 id="java-\u5B66\u4E60\u7684\u91CD\u70B9\u662F\u4EC0\u4E48" tabindex="-1"><a class="header-anchor" href="#java-\u5B66\u4E60\u7684\u91CD\u70B9\u662F\u4EC0\u4E48" aria-hidden="true">#</a> Java \u5B66\u4E60\u7684\u91CD\u70B9\u662F\u4EC0\u4E48</h2><p>\u201C\u51B0\u51BB\u4E09\u5C3A\u975E\u4E00\u65E5\u4E4B\u5BD2\u201D\uFF0C\u8981\u60F3\u628A Java \u5B66\u597D\uFF0C\u8FD8\u662F\u9700\u8981\u82B1\u8D39\u4E00\u756A\u529F\u592B\u7684\u3002Java \u8BED\u8A00\u7684\u77E5\u8BC6\u70B9\u975E\u5E38\u591A\uFF0C\u800C\u6211\u4EEC\u53C8\u65F6\u95F4\u7D27\u8FEB\uFF0C\u610F\u5473\u7740\u53EA\u80FD\u6311\u91CD\u70B9\u3001\u6311\u5B9E\u7528\uFF0C\u4E0D\u80FD\u9762\u9762\u4FF1\u5230\uFF0C<strong>\u4E00\u4E9B\u4E0D\u5E38\u7528\u7684\u77E5\u8BC6\u70B9\u53EF\u4EE5\u76F4\u63A5 pass \u6389</strong>\u3002</p><p>\u6211\u8FD9\u91CC\u7ED9\u5927\u5BB6\u8D34\u4E00\u5F20\u300AJava \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF\u300B\u7684\u5BFC\u822A\u5730\u56FE\uFF0C\u5927\u7C7B\u5206\u4E3A Java \u6838\u5FC3\u3001Java \u4F01\u4E1A\u7EA7\u5F00\u53D1\u3001\u6570\u636E\u5E93\u3001\u8BA1\u7B97\u673A\u57FA\u7840\u3001\u6C42\u804C\u9762\u8BD5\u3001\u5B66\u4E60\u8D44\u6E90\u7B49\uFF0C\u57FA\u672C\u4E0A\u4F60\u8981\u7684 Java \u5B66\u4E60\u8D44\u6E90\uFF0C\u8FD9\u91CC\u90FD\u6709\uFF0C\u6CA1\u6709\u7684\uFF0C\u540E\u9762\u6211\u4E5F\u4F1A\u8865\u5145\u4E0A\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/yitiaolong-c80191bf-ab08-4a28-898f-ea7ffff3f966.png" alt=""></p><p>Java \u662F\u4E00\u95E8\u9762\u5411\u5BF9\u8C61\u7684\u7F16\u7A0B\u8BED\u8A00\uFF0C\u6240\u4EE5\u4E09\u5927\u7279\u6027\uFF1A\u5C01\u88C5\u3001\u7EE7\u627F\u3001\u591A\u6001\u662F\u5FC5\u987B\u8981\u638C\u63E1\u7684\uFF0C\u7136\u540E\u662F\u5F02\u5E38\u5904\u7406\u3001IO\u3001\u96C6\u5408\u3001\u5E76\u53D1\u7F16\u7A0B\u548C Java \u865A\u62DF\u673A\u3002\u53EA\u8981\u8FD9\u4E9B\u5185\u5BB9\u638C\u63E1\u4E86\uFF0C\u53EF\u4EE5\u8BF4 Java \u8BED\u8A00\u672C\u8EAB\u7684\u6838\u5FC3\u77E5\u8BC6\u5C31\u5168\u90E8\u638C\u63E1\u4E86\u3002</p><p>\u8FD9\u4E9B\u77E5\u8BC6\u8BE5\u600E\u4E48\u5B66\u5462\uFF1F\u5F53\u7136\u662F\u76F4\u63A5\u4E0A\u4E8C\u54E5\u7684 Java \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF\u4E86\uFF0C\u5185\u5BB9\u975E\u5E38\u7684\u5168\u9762\u548C\u786C\u6838\uFF0C\u622A\u56FE\u7ED9\u5927\u5BB6\u9274\u8D4F\u4E00\u4E0B\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/yitiaolong-a5436c4a-6464-4065-ae0d-50755c4184df.png" alt=""></p><p>\u8BB0\u4F4F\u6211\u4EEC\u7684\u7F51\u5740\uFF1A</p>',9),D={href:"https://tobebetterjavaer.com/home.html#java%E6%A0%B8%E5%BF%83",target:"_blank",rel:"noopener noreferrer"},q=t("https://tobebetterjavaer.com/"),I=e("p",null,"\u8FD9\u5176\u4E2D\u7684\u96BE\u70B9\u662F\u5E76\u53D1\u7F16\u7A0B\u548C JVM\uFF0C\u663E\u7136\u8FD9\u4E24\u90E8\u5206\u7684\u5185\u5BB9\u5B66\u8D77\u6765\u5E76\u4E0D\u5BB9\u6613\uFF0C\u4F46\u5374\u6700\u80FD\u8003\u9A8C\u4E00\u540D Java \u540E\u7AEF\u5DE5\u7A0B\u5E08\u7684\u529F\u5E95\u4E86\u3002",-1),L=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/yitiaolong-dac18663-f729-41d6-8253-2473b2174b9e.png",alt:"Java \u5E76\u53D1\u7F16\u7A0B\u6838\u5FC3\u77E5\u8BC6\u70B9"})],-1),A=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/yitiaolong-35df7e61-99c1-4efc-8f9f-702cc0f08904.png",alt:"JVM 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demo\uFF0C\u4EE5\u4FBF\u4EE5\u540E\u53EF\u4EE5\u5FEB\u901F\u5F97\u627E\u5F97\u5230\uFF0C\u5C24\u5176\u662F\u4E00\u4E9B\u5C0F\u5957\u8DEF\uFF0C\u4F1A\u5F88\u6709\u7528\uFF0C\u79EF\u7D2F\u5F97\u591A\u4E86\uFF0C\u53EF\u80FD\u5C31\u53D8\u6210\u4E86\u81EA\u5DF1\u7684\u5DE5\u5177\u5E93\u3002",-1),H=e("p",null,"\u4E00\u5B9A\u8981\u5584\u5F85\u81EA\u5DF1\u5199\u8FC7\u7684\u90A3\u4E9B\u5C0F demo\uFF0C\u5C24\u5176\u662F\u90A3\u4E9B\u5DF2\u7ECF\u8C03\u901A\u7684\uFF0C\u5343\u4E07\u4E0D\u8981\u6254\uFF0C\u6CA1\u51C6\u54EA\u4E00\u5929\u80FD\u5E2E\u4E0A\u5927\u5FD9\u3002\u4EE5\u6211\u7684\u7ECF\u9A8C\uFF0C\u5728\u5B66\u4E60\u7684\u8FC7\u7A0B\u4E2D\uFF0C\u5C3D\u7BA1\u67D0\u4E9B\u77E5\u8BC6\u70B9\u5728\u5F53\u65F6\u7406\u89E3\u7684\u591A\u4E48\u900F\u5F7B\uFF0C\u4F46\u53EA\u8981\u65F6\u95F4\u4E00\u957F\uFF0C\u6216\u8005\u6362\u4E2A\u5F00\u53D1\u73AF\u5883\uFF0C\u53EF\u80FD\u5C31\u5B8C\u86CB\uFF0C\u660E\u660E\u611F\u89C9\u4EE3\u7801\u662F\u4E00\u6837\u7684\uFF0C\u4F46\u5C31\u662F\u8FD0\u884C\u4E0D\u8D77\u6765\u3002\u5982\u679C\u624B\u5934\u6070\u597D\u6709\u8FD9\u4E48\u4E00\u4E2A demo\uFF0C\u6253\u5F00\u53C2\u8003\u4E00\u4E0B\uFF0C\u751A\u81F3\u62F7\u8D1D\u8FC7\u6765\u8BD5\u4E00\u4E0B\uFF0C\u95EE\u9898\u5C31\u4F1A\u8FCE\u5203\u800C\u89E3\u3002",-1),P=e("p",null,"\u5927\u90E8\u5206 Java \u7A0B\u5E8F\u5458\u90FD\u8981\u4ECE\u4E8B JavaWeb \u7684\u76F8\u5173\u5F00\u53D1\u5DE5\u4F5C\uFF0C\u8981\u5F00\u53D1 JavaWeb\uFF0C\u81EA\u7136\u5C31\u79BB\u4E0D\u5F00 Spring \u7684\u7CFB\u5217\u6846\u67B6\uFF08\u4E4B\u524D\u662F SSM\uFF0C\u73B0\u5728\u662F Spring Boot\uFF09\u3002 \u4F46\u4E0D\u7BA1\u600E\u4E48\u6F14\u53D8\uFF0CSpring \u7684\u6838\u5FC3\u6982\u5FF5\u4ECD\u7136\u662F IOC \u548C AOP\uFF0C\u4E5F\u5C31\u662F\u63A7\u5236\u53CD\u8F6C\u548C\u9762\u5411\u5207\u9762\u7F16\u7A0B\u3002",-1),W=t("\u5173\u4E8E Spring Boot \u7684\u5B9E\u6218\u5185\u5BB9\uFF0C\u4E8C\u54E5\u4E5F\u5728\u7D27\u9523\u5BC6\u9F13\u7684\u51C6\u5907"),G={href:"https://github.com/itwanger/coding-more",target:"_blank",rel:"noopener noreferrer"},z=t("\u7F16\u7A0B\u55B5"),N=t("\u8FD9\u4E2A\u5B9E\u6218\u9879\u76EE\uFF0C\u53EF\u4EE5\u5148\u7ED9\u5927\u5BB6\u5C55\u793A\u4E00\u4E0B\u540E\u7AEF\u7528\u5230\u7684\u6280\u672F\u6808\uFF0C\u90FD\u662F\u975E\u5E38\u4E3B\u6D41\u7684\u6280\u672F\u3002"),O=n('<p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhishixingqiu/readme-8.png" alt=""></p><p>\u5982\u679C\u8BF4\u4F60\u5DF2\u7ECF\u638C\u63E1\u4E86 Spring\u3001SpringMVC\u3001MyBatis\u3001Spring Boot \u7B49\u5185\u5BB9\uFF0C\u5C31\u6709\u80FD\u529B\u8FDB\u884C\u4E00\u4E9B\u771F\u6B63\u6709\u7528\u7684\u5E94\u7528\u9879\u76EE\u5F00\u53D1\u4E86\uFF0C\u6BD4\u5982\u8BF4\u5B66\u751F\u7BA1\u7406\u7CFB\u7EDF\u3001\u5546\u57CE\u7CFB\u7EDF\u3001\u535A\u5BA2\u7CFB\u7EDF\u3001\u79D2\u6740\u7CFB\u7EDF\u7B49\u7B49\u3002</p><p>\u5F53\u7136\u4E86\uFF0C\u8981\u505A\u5B8C\u6574\u7684 Java Web \u9879\u76EE\uFF0C\u524D\u7AEF\u7684\u4E00\u4E9B\u77E5\u8BC6\u80AF\u5B9A\u662F\u5C11\u4E0D\u4E86\u7684\uFF0C\u4F46\u4E0D\u80FD\u653E\u592A\u591A\u5FC3\u601D\uFF0C\u754C\u9762\u4E11\u70B9\u65E0\u6240\u8C13\uFF0C\u91CD\u70B9\u5728 Java \u540E\u7AEF\u4E0A\u9762\u3002</p><p>\u5B66\u4E60\u7F16\u7A0B\u5C31\u662F\u4E00\u4E2A\u7531\u6DF7\u6C8C\u5230\u6709\u5E8F\u7684\u8FC7\u7A0B\uFF0C\u5982\u679C\u78B0\u5230\u4E86\u7406\u89E3\u4E0D\u4E86\u7684\u77E5\u8BC6\uFF0C\u4E0D\u8981\u6000\u7591\u81EA\u5DF1\u9002\u4E0D\u9002\u5408\u7F16\u7A0B\uFF0C\u8DF3\u8FC7\u5C31\u884C\u4E86\uFF0C\u8FD9\u662F\u518D\u6B63\u5E38\u4E0D\u8FC7\u7684\u4E8B\u4E86\u2014\u2014\u5FC5\u987B\u62B1\u6709\u4E00\u9897\u8D8A\u632B\u8D8A\u52C7\u7684\u5FC3\u3002</p><h2 id="\u54EA\u4E9Bjava\u77E5\u8BC6\u4E0D\u9700\u8981\u518D\u5B66\u4E86" tabindex="-1"><a class="header-anchor" href="#\u54EA\u4E9Bjava\u77E5\u8BC6\u4E0D\u9700\u8981\u518D\u5B66\u4E86" aria-hidden="true">#</a> \u54EA\u4E9BJava\u77E5\u8BC6\u4E0D\u9700\u8981\u518D\u5B66\u4E86</h2><p>\u5F20\u65E0\u5FCC\u5728\u5B66\u592A\u6781\u62F3\u7684\u65F6\u5019\uFF0C\u592A\u5E08\u7236\u5F20\u4E09\u4E30\u5C31\u5BF9\u4ED6\u558A\uFF0C\u4E00\u5B9A\u8981\u628A\u4E4B\u524D\u6240\u5B66\u4E60\u7684\u6B66\u529F\u5168\u90E8\u5FD8\u6389\uFF0C<strong>\u5FD8\u5F97\u8D8A\u591A\u5C31\u4F1A\u5B66\u5F97\u8D8A\u5FEB</strong>\u3002\u540C\u6837\u7684\uFF0C\u81EA\u5B66 Java \u7684\u65F6\u5019\u4E00\u5B9A\u8981\u5148\u77E5\u9053\u54EA\u4E9B Java \u77E5\u8BC6\u4E0D\u9700\u8981\u518D\u5B66\u4E86\uFF0C\u6BD5\u7ADF\u6280\u672F\u7684\u66F4\u65B0\u8FED\u4EE3\u5C31\u597D\u50CF\u706B\u7BAD\u4E00\u6837\u5FEB\uFF0CJava \u7684\u4E00\u4E9B\u77E5\u8BC6\u70B9\u65E9\u5DF2\u7ECF\u8FC7\u65F6\u4E86\u3002\u5982\u679C\u4E0D\u61C2\u5F97\u65AD\u820D\u79BB\uFF0C\u90A3\u5B66\u8D77\u6765\u5C31\u4E0D\u514D\u592A\u75DB\u82E6\u4E86\u3002</p><p>1\uFF09AWT \u548C Swing</p><p>\u5DF2\u7ECF 2022 \u5E74\u4E86\uFF0C\u8C01\u8FD8\u4F1A\u7528 AWT \u548C Swing \u53BB\u5F00\u53D1\u684C\u9762\u5E94\u7528\u5462\uFF1F\u5B66\u597D\u540E\u7AEF\u5F00\u53D1\u5373\u53EF\uFF0C\u73B0\u5728\u662F\u79FB\u52A8\u4E92\u8054\u7F51\u65F6\u4EE3\uFF0C\u57FA\u672C\u4E0A\u90FD\u662F\u624B\u673AAPP\u3001\u5C0F\u7A0B\u5E8F\u3001Web \u7F51\u9875\u6765\u505A\u524D\u7AEF\u4E86\uFF0C\u53EF\u4EE5\u628A\u5B66\u4E60\u7684\u91CD\u5FC3\u653E\u5230 Spring Boot\u3001Spring Cloud\u3001Netty\u3001Dubbo\u3001Zookeeper\u3001Mysql\u4E0A\u3002</p><p>2\uFF09Applet</p><p>\u4F5C\u4E3A\u7F51\u9875\u63D2\u4EF6\u6280\u672F\uFF0CApplet \u538B\u6839\u5C31\u6CA1\u6D41\u884C\u8D77\u6765\u3002</p><p>3\uFF09XML</p><p>XML \u8FD8\u6CA1\u6709\u88AB\u6DD8\u6C70\uFF0C\u5E94\u7528\u7684\u5730\u65B9\u8FD8\u6709\u4E0D\u5C11\uFF0C\u6BD4\u5982\u8BF4 Maven \u7684 pom.xml \u6587\u4EF6\u91CC\u5C31\u8FD8\u5728\u7528\u3002\u4F46\u662F\u4F5C\u4E3A\u4E00\u79CD\u6570\u636E\u4F20\u8F93\u683C\u5F0F\uFF0C\u5B83\u6B63\u5728\u88AB JSON \u66FF\u4EE3\u3002\u81F3\u4E8E\u590D\u6742\u7684 XML \u64CD\u4F5C API\uFF08\u4F8B\u5982 XPath\uFF09\u5C31\u5B8C\u5168\u6CA1\u5FC5\u8981\u5B66\u4E60\u4E86\uFF0C\u5982\u679C\u771F\u7684\u7528\u5230\u4E86\uFF0C\u518D\u53BB\u8865\u4E5F\u4E0D\u8FDF\u3002</p><p>4\uFF09JDBC</p><p>\u6211\u4E2A\u4EBA\u4E0D\u5EFA\u8BAE\u518D\u5B66\u4E60\u504F\u5E95\u5C42\u7684 JDBC \u4E86\uFF0C\u5C24\u5176\u662F\u5BF9\u4E8E\u65F6\u95F4\u5B9D\u8D35\u7684\u81EA\u5B66\u7A0B\u5E8F\u5458\u6765\u8BF4\u3002\u4E0E\u5176\u82B1\u8FD9\u70B9\u65F6\u95F4\uFF0C\u4E0D\u5982\u628A\u7CBE\u529B\u6295\u5165\u5230 MyBatis \u7684\u5B66\u4E60\u4E0A\u3002\u5F53\u7136\u4E86\uFF0C\u5982\u679C\u771F\u7684\u6709\u65F6\u95F4\uFF0C\u771F\u7684\u60F3\u6253\u57FA\u7840\uFF0C\u7814\u7A76\u4E00\u4E0B\u4E5F\u65E0\u53EF\u539A\u975E\u3002</p><p>5\uFF09Struts</p><p>Struts \u662F\u65E9\u5E74\u4E00\u4E2A\u4F18\u79C0\u7684 MVC \u6846\u67B6\uFF0C\u5355\u4ECE\u6280\u672F\u7684\u89D2\u5EA6\u6765\u770B\uFF0C\u8FD8\u662F\u86EE\u4E0D\u9519\u7684\u3002\u4F46\u662F\u81EA\u4ECE\u6709\u4E86 SpringMVC \u540E\uFF0CStruts \u5C31\u88AB\u62CD\u6B7B\u5728\u6C99\u6EE9\u4E0A\u4E86\u3002</p><p>6\uFF09Hibernate</p><p>\u5728\u6211\u521A\u53C2\u52A0\u5DE5\u4F5C\u90A3\u4F1A\uFF082010 \u5E74\u7684\u65F6\u5019\uFF09\uFF0C\u6301\u4E45\u5C42\u6846\u67B6\u7528\u7684\u6B63\u662F Hibernate\u3002\u4F46\u65F6\u8FC7\u5883\u8FC1\uFF0CHibernate \u592A\u91CD\u91CF\u7EA7\u4E86\uFF0C\u5B66\u4E60\u6210\u672C\u592A\u9AD8\uFF0C\u53D6\u800C\u4EE3\u4E4B\u7684\u662F\u8F7B\u91CF\u7EA7\u7684 MyBatis\u3002\u73B0\u5728\u6709\u4E00\u79CD\u8BF4\u6CD5\u5C31\u662F\u8FD9\u79CD\u5BF9\u8C61\u5173\u7CFB\u6620\u5C04\u592A\u8FC7\u6B7B\u677F\u4E86\uFF0C\u4E0D\u5982\u76F4\u63A5\u5199 SQL \u6765\u5F97\u7075\u6D3B\uFF0C\u50CF\u6211\u5F88\u559C\u6B22\u7684\u4E00\u4E2A\u8F7B\u91CF\u7EA7\u6846\u67B6 JFinal \u5C31\u66F4\u504F\u91CD\u4E8E\u5728 Java \u4EE3\u7801\u4E2D\u5199 SQL\uFF0C\u800C\u4E0D\u50CF MyBatis \u548C Hibernate \u5728 xml \u6587\u4EF6\u4E2D\u5199\u3002</p><p>7\uFF09JSP</p><p>JSP \u5728\u5B9E\u9645\u5F00\u53D1\u4E2D\uFF0C\u4E3B\u8981\u662F\u4F5C\u4E3A MVC \u6A21\u578B\u4E2D\u7684V\uFF08View\uFF09\u5C42\u51FA\u73B0\u7684\u3002\u5B83\u672C\u6765\u662F\u4E3A Java \u540E\u7AEF\u7A0B\u5E8F\u5458\u5F00\u53D1\u524D\u7AEF\u754C\u9762\u800C\u751F\u7684\uFF0C\u4F46\u968F\u7740\u6280\u672F\u7684\u53D1\u5C55\uFF0C\u524D\u540E\u7AEF\u5206\u79BB\u7684\u6D41\u884C\uFF0CJSP \u7684\u751F\u547D\u5468\u671F\u5DF2\u7ECF\u5230\u5934\u4E86\u3002</p><p>8\uFF09Servlet</p><p>\u867D\u7136 SpringMVC \u7684\u5E95\u5C42\u662F\u4EE5 Servlet \u4E3A\u57FA\u7840\u7684\uFF0C\u662F JavaWeb \u5BB9\u5668\u7684\u57FA\u77F3\uFF0C\u4F46 Servlet \u7684\u786E\u5DF2\u7ECF\u8FC7\u65F6\u4E86\u3002\u5982\u679C\u540E\u9762\u6709\u7A7A\u4F59\u65F6\u95F4\u7684\u8BDD\uFF0C\u60F3\u94BB\u7684\u8BDD\u53EF\u4EE5\u94BB\u4E00\u4E0B\uFF0C\u5BF9\u670D\u52A1\u5668\u7AEF\u63A5\u6536\u8BF7\u6C42\u6570\u636E\u548C\u5411\u524D\u7AEF\u53D1\u9001\u54CD\u5E94\u6570\u636E\u65F6\u4F1A\u6709\u4E00\u4E9B\u5E2E\u52A9\u3002</p><p>\u6211\u8FD9\u6837\u7684\u8BF4\u6CD5\u53EF\u80FD\u4E0D\u591F\u53EF\u89C2\uFF0C\u4E0D\u591F\u987E\u53CA\u5E95\u5C42\u77E5\u8BC6\uFF0C\u4F46\u81EA\u5B66\u7684\u65F6\u95F4\u6210\u672C\u8FD8\u662F\u8981\u9002\u5F53\u63A7\u5236\u4E00\u4E0B\u3002<strong>\u603B\u4E4B\uFF0C\u6211\u4EEC\u5E94\u8BE5\u7701\u4E0B\u66F4\u591A\u7684\u65F6\u95F4\u53BB\u5B66\u4E60\u524D\u9762\u5C0F\u8282\u63D0\u5230\u7684\u91CD\u70B9\u77E5\u8BC6</strong>\uFF01</p><h2 id="\u5B66\u4E60java\u8FD8\u9700\u8981\u8865\u5145\u54EA\u4E9B\u77E5\u8BC6" tabindex="-1"><a class="header-anchor" href="#\u5B66\u4E60java\u8FD8\u9700\u8981\u8865\u5145\u54EA\u4E9B\u77E5\u8BC6" aria-hidden="true">#</a> \u5B66\u4E60Java\u8FD8\u9700\u8981\u8865\u5145\u54EA\u4E9B\u77E5\u8BC6</h2><h3 id="_1-\u6570\u636E\u7ED3\u6784\u4E0E\u7B97\u6CD5" tabindex="-1"><a class="header-anchor" href="#_1-\u6570\u636E\u7ED3\u6784\u4E0E\u7B97\u6CD5" aria-hidden="true">#</a> <strong>1\uFF09\u6570\u636E\u7ED3\u6784\u4E0E\u7B97\u6CD5</strong></h3><p>\u6BEB\u65E0\u7591\u95EE\uFF0C\u6570\u636E\u7ED3\u6784\u5BF9\u4E00\u540D\u7A0B\u5E8F\u5458\u6765\u8BF4\u975E\u5E38\u91CD\u8981\uFF0C\u8FD8\u662F\u90A3\u53E5\u8BDD<code>\u7A0B\u5E8F=\u6570\u636E\u7ED3\u6784+\u7B97\u6CD5</code>\uFF0C\u8FD9\u79CD\u8BF4\u6CD5\u65E0\u8BBA\u653E\u5728\u4EC0\u4E48\u65F6\u5019\u90FD\u662F\u6210\u7ACB\u7684\u3002</p><p>\u5927\u90E8\u5206\u7684<strong>\u6570\u636E\u7ED3\u6784</strong>\u8BFE\u7A0B\uFF0C\u5173\u6CE8\u7684\u91CD\u70B9\u90FD\u5728\u5982\u4F55\u4ECE\u6570\u5B66\u4E0A\u5B9E\u73B0\u4E00\u4E2A\u6570\u636E\u7ED3\u6784\uFF0C\u4F46\u5728\u5B9E\u9645\u5F00\u53D1\u4E2D\uFF0C\u5927\u90E8\u5206\u4E3B\u6D41\u8BED\u8A00\u90FD\u5DF2\u7ECF\u5185\u7F6E\u4E86\u5E38\u89C1\u7684\u6570\u636E\u7ED3\u6784\uFF0C\u6BD4\u5982\u8BF4 Java\u3002\u4E5F\u5C31\u662F\u8BF4\uFF0C\u5BF9\u4E8E\u5927\u90E8\u5206\u7A0B\u5E8F\u5458\u6765\u8BF4\uFF0C\u5B9E\u9645\u5F00\u53D1\u4E2D\uFF0C\u5F88\u96BE\u6709\u9700\u6C42\u8981\u4ECE\u96F6\u5F00\u59CB\u5B9E\u73B0\u4E00\u4E2A\u6570\u636E\u7ED3\u6784\u3002\u56E0\u6B64\u6211\u4EEC\u53EA\u9700\u8981\u505A\u5230\u4E0B\u9762\u51E0\u70B9\u3002</p><p>1\u3001\u719F\u6089\u5E38\u89C1\u6570\u636E\u7ED3\u6784\u7684\u6982\u5FF5\uFF0C\u6BD4\u5982\u8BF4\u6570\u7EC4\u3001\u5806\u6808\u3001\u94FE\u8868\u3001\u54C8\u5E0C\u8868\u7B49\u3002</p>',28),T=t("2\u3001\u4E86\u89E3\u5E38\u7528\u6570\u636E\u7ED3\u6784\u4E4B\u95F4\u7684\u5DEE\u5F02\uFF0C\u6BD4\u5982\u8BF4 "),F={href:"https://tobebetterjavaer.com/collection/list-war-2.html",target:"_blank",rel:"noopener noreferrer"},K=t("ArrayList \u548C LinkedList"),R=t("\u3002"),X=e("p",null,"3\u3001\u5173\u6CE8\u5E38\u7528\u6570\u636E\u7ED3\u6784\u7684\u5916\u56F4\u7B97\u6CD5\uFF0C\u6BD4\u5982\u8BF4\u5982\u4F55\u5BF9 List \u548C Map \u8FDB\u884C\u67E5\u627E\u3002",-1),Z=e("p",null,"4\u3001\u5173\u6CE8\u6570\u636E\u7ED3\u6784\u4F7F\u7528\u4E2D\u5BB9\u6613\u51FA\u9519\u7684\u5730\u65B9\uFF0C\u6BD4\u5982\u8BF4\u7EBF\u7A0B\u662F\u5426\u5B89\u5168\u7B49\u3002",-1),Q=e("p",null,"B \u7AD9\u4E0A\u6D59\u6C5F\u5927\u5B66\u7684\u4E00\u4E2A\u6570\u636E\u7ED3\u6784\u8BFE\u975E\u5E38\u4E0D\u9519\uFF0C\u5F88\u7CFB\u7EDF\u5F88\u7ECF\u5178\u3002",-1),U=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/yitiaolong-e2812c94-5945-41ad-adcd-4dbb02fae8d5.png",alt:""})],-1),Y=t("\u89C6\u9891\u5730\u5740\uFF1A"),$={href:"https://www.bilibili.com/video/BV1JW411i731",target:"_blank",rel:"noopener noreferrer"},ee=t("https://www.bilibili.com/video/BV1JW411i731"),te=n('<p>\u4EE5\u6211\u63A5\u89E6\u7684\u9886\u57DF\u6765\u8BF4\uFF0C\u5927\u90E8\u5206\u666E\u901A\u7684\u4E1A\u52A1\u7CFB\u7EDF\u90FD\u4E0D\u4F1A\u6D89\u53CA\u5230\u592A\u590D\u6742\u7684<strong>\u7B97\u6CD5</strong>\uFF0C\u56E0\u6B64\u6211\u6CA1\u6709\u5728\u7B97\u6CD5\u4E0A\u6295\u5165\u8FC7\u591A\u65F6\u95F4\u3002\u4F46\u5982\u679C\u4F60\u5C06\u6765\u8981\u4ECE\u4E8B\u4E00\u4E9B\u7279\u6B8A\u7684\u9886\u57DF\uFF0C\u5982\u679C\u7B97\u6CD5\u8DDF\u4E0D\u4E0A\uFF0C\u53EF\u4EE5\u8BF4\u662F\u201C\u5BF8\u6B65\u96BE\u884C\u201D\uFF0C\u6BD4\u5982\u8BF4\u56FE\u5F62\u5904\u7406\u9886\u57DF\uFF0C\u65E0\u8BBA\u662F\u56FE\u50CF\u7684\u53D8\u5316\u8FD8\u662F\u589E\u5F3A\uFF0C\u65E0\u4E00\u4F8B\u5916\u90FD\u8981\u7528\u5230\u77E9\u9635\u53D8\u6362\uFF0C\u56E0\u6B64\u5C31\u5FC5\u7136\u6D89\u53CA\u5230\u7EBF\u6027\u4EE3\u6570\u7684\u5185\u5BB9\uFF0C\u518D\u5F80\u6DF1\u5904\u5B66\u7684\u8BDD\uFF0C\u5FC5\u7136\u4F1A\u7275\u626F\u51FA\u66F4\u591A\u7684\u77E5\u8BC6\u3002</p><p>\u6240\u4EE5\u5B66\u4E60\u7B97\u6CD5\u8981\u89C6\u60C5\u51B5\u800C\u5B9A\uFF0C\u5982\u679C\u60F3\u8D70\u7B97\u6CD5\u5C97\uFF0C\u90A3\u4E48\u300A\u7B97\u6CD5\u7B2C4\u7248\u300B\u3001\u300A\u7B97\u6CD5\u5BFC\u8BBA\u300B\u3001\u300A\u6570\u5B66\u4E4B\u7F8E\u300B\u3001\u300A\u7F16\u7A0B\u73E0\u7391\u300B\u3001\u300A\u5251\u6307offer\u300B\u8FD9\u4E9B\u4E66\u90FD\u8981\u8010\u7740\u6027\u5B50\u5543\u4E00\u5543\u3002</p><h3 id="_2-\u8BBE\u8BA1\u6A21\u5F0F" tabindex="-1"><a class="header-anchor" href="#_2-\u8BBE\u8BA1\u6A21\u5F0F" aria-hidden="true">#</a> <strong>2\uFF09\u8BBE\u8BA1\u6A21\u5F0F</strong></h3><p>\u6211\u8BA4\u4E3A<strong>\u8BBE\u8BA1\u6A21\u5F0F</strong>\u662F\u521D\u4E2D\u7EA7\u7A0B\u5E8F\u5458\u8FC8\u5411\u9AD8\u7EA7\u7A0B\u5E8F\u5458\u7684\u5FC5\u7ECF\u4E4B\u8DEF\u3002\u6709\u4E0D\u5C11\u7A0B\u5E8F\u5458\uFF0C\u524D\u671F\u51B2\u52B2\u5341\u8DB3\uFF0C\u4F46\u540E\u7EE7\u4E4F\u529B\uFF0C\u90FD\u662F\u5403\u4E86\u8BBE\u8BA1\u6A21\u5F0F\u7684\u4E8F\u3002\u5728\u5DE5\u4F5C\u7684\u524D\u51E0\u5E74\uFF0C\u5927\u90E8\u5206\u7A0B\u5E8F\u5458\u90FD\u5904\u4E8E\u719F\u6089\u7F16\u7A0B\u8BED\u8A00\u7684\u9636\u6BB5\uFF0C\u4E5F\u5C31\u662F\u5904\u4E8E\u201C\u6280\u201D\u7684\u9636\u6BB5\uFF0C\u968F\u540E\u5C31\u8981\u8FDB\u5165\u201C\u672F\u201D\u7684\u9636\u6BB5\u4E86\u3002\u5728\u7F16\u7A0B\u9886\u57DF\uFF0C\u201C\u672F\u201D\u7684\u5178\u578B\u4EE3\u8868\u5C31\u662F\u201C\u8BBE\u8BA1\u6A21\u5F0F\u201D\u3002</p><p>\u5B66\u4E60\u8BBE\u8BA1\u6A21\u5F0F\u7684\u8BDD\uFF0C\u63A8\u8350\u597D\u670B\u53CB\u5C0F\u5085\u54E5\u7684\u300A\u91CD\u5B66 Java \u8BBE\u8BA1\u6A21\u5F0F\u300B\u3002\u6211\u4E4B\u524D\u63A8\u8350\u7684 Refactoring Guru \u7F51\u7AD9\uFF0C\u4E5F\u975E\u5E38\u7684 nice\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/yitiaolong-3b9ab6b9-67f2-4810-bb39-9e1f48ffe3da.png" alt=""></p>',6),ae=t("\u5728\u7EBF\u9605\u8BFB\u5730\u5740\uFF1A"),oe={href:"https://refactoring.guru",target:"_blank",rel:"noopener noreferrer"},ne=t("https://refactoring.guru"),re=n('<p>\u9700\u8981\u79BB\u7EBF\u7248\u7684\u5C0F\u4F19\u4F34\u8BF7\u957F\u6309\u8BC6\u522B/\u626B\u63CF\u4E0B\u65B9\u7684\u4E8C\u7EF4\u7801\u5173\u6CE8\u4F5C\u8005\u7684\u539F\u521B\u516C\u4F17\u53F7\u300C<strong>\u6C89\u9ED8\u738B\u4E8C</strong>\u300D\u56DE\u590D\u5173\u952E\u5B57\u300C<strong>\u8BBE\u8BA1\u6A21\u5F0F</strong>\u300D\u5C31\u53EF\u4EE5\u62C9\u53D6\u5230\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongzhonghao.png" alt="\u626B\u7801\u5173\u6CE8\u540E\u56DE\u590D\u300C\u8BBE\u8BA1\u6A21\u5F0F\u300D\u5173\u952E\u5B57"></p><h3 id="_3-jdk\u6E90\u7801" tabindex="-1"><a class="header-anchor" href="#_3-jdk\u6E90\u7801" aria-hidden="true">#</a> <strong>3\uFF09JDK\u6E90\u7801</strong></h3><p>\u9762\u8BD5\u7684\u65F6\u5019\uFF0C\u9762\u8BD5\u5B98\u90FD\u7279\u522B\u559C\u6B22\u95EE\u4E00\u4E9B\u6E90\u7801\u65B9\u9762\u7684\u77E5\u8BC6\uFF0C\u6BD4\u5982\u8BF4 HashMap \u7684\u4E00\u4E9B\u7ECF\u5178\u95EE\u9898\uFF1A</p><ul><li>\u52A0\u8F7D\u56E0\u5B50\u4E3A\u4EC0\u4E48\u662F 0.75\uFF1F</li><li>\u4E3A\u4EC0\u4E48\u94FE\u8868\u6539\u4E3A\u7EA2\u9ED1\u6811\u7684\u9608\u503C\u662F 8?</li><li>HashMap\u7684\u5E95\u5C42\u6570\u636E\u7ED3\u6784\u662F\u4EC0\u4E48\uFF1F</li><li>\u89E3\u51B3hash\u51B2\u7A81\u7684\u529E\u6CD5\u6709\u54EA\u4E9B\uFF1F</li><li>HashMap\u6570\u7EC4\u7684\u957F\u5EA6\u4E3A\u4EC0\u4E48\u662F 2 \u7684\u5E42\u6B21\u65B9\uFF1F</li><li>HashMap \u7684\u6269\u5BB9\u65B9\u5F0F\uFF1F</li></ul><p>\u8FD9\u4E9B\u95EE\u9898\u53EA\u6709\u901A\u8FC7\u6E90\u7801\u624D\u80FD\u5F97\u51FA\u6BD4\u8F83\u51C6\u786E\u7684\u56DE\u7B54\uFF0C\u5BF9\u5427\uFF1F</p><p>\u6709\u4E2A\u540C\u5B66\u8BF4\u8FC7\u4E00\u53E5\u8BDD\uFF0C\u7ED9\u6211\u7684\u5370\u8C61\u7279\u522B\u6DF1\u523B\uFF0C\u5C31\u662F\u201C\u6709\u5565\u89E3\u51B3\u4E0D\u4E86\u7684\uFF1F\u53EA\u8981\u4F60\u80AF\u9605\u8BFB\u6E90\u7801\u3002\u201D\u7F8A\u54E5\u51FA\u8FC7\u4E00\u4E2A\u89C6\u9891\uFF0C\u8BE6\u7EC6\u5730\u4ECB\u7ECD\u4E86\u5982\u4F55\u9605\u8BFB JDK \u6E90\u7801\uFF0C\u63A8\u8350\u7ED9\u5927\u5BB6\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/yitiaolong-130bcb8a-38bb-448f-8dc1-4e2af22153d2.png" alt=""></p>',8),ie=t("\u89C6\u9891\u5730\u5740\uFF1A"),se={href:"https://www.bilibili.com/video/BV1V7411U78L",target:"_blank",rel:"noopener noreferrer"},pe=t("https://www.bilibili.com/video/BV1V7411U78L"),le=e("h3",{id:"_4-\u64CD\u4F5C\u7CFB\u7EDF\u3001\u8BA1\u7B97\u673A\u7EC4\u6210\u539F\u7406\u548C\u8BA1\u7B97\u673A\u7F51\u7EDC",tabindex:"-1"},[e("a",{class:"header-anchor",href:"#_4-\u64CD\u4F5C\u7CFB\u7EDF\u3001\u8BA1\u7B97\u673A\u7EC4\u6210\u539F\u7406\u548C\u8BA1\u7B97\u673A\u7F51\u7EDC","aria-hidden":"true"},"#"),t(),e("strong",null,"4\uFF09\u64CD\u4F5C\u7CFB\u7EDF\u3001\u8BA1\u7B97\u673A\u7EC4\u6210\u539F\u7406\u548C\u8BA1\u7B97\u673A\u7F51\u7EDC")],-1),ce=e("p",null,"\u8FD9\u4E09\u95E8\u8BFE\u7684\u91CD\u8981\u6027\u5C31\u4E0D\u7528\u6211\u591A\u8BF4\u4E86\uFF0C\u5982\u679C\u6709\u65F6\u95F4\u6709\u7CBE\u529B\uFF0C\u63A8\u8350\u6309\u7167\u4E0B\u9762\u7684\u8DEF\u7EBF\u53BB\u5B66\u4E60\u3002",-1),he=e("p",null,"\u63A8\u8350\u54C8\u5DE5\u5927\u7684\u300A\u64CD\u4F5C\u7CFB\u7EDF\u300B\u5B9E\u9A8C\u8BFE\uFF0C\u5305\u62EC\u64CD\u4F5C\u7CFB\u7EDF\u57FA\u7840\u7BC7\u3001\u64CD\u4F5C\u7CFB\u7EDF\u4E4B\u8FDB\u7A0B\u4E0E\u7EBF\u7A0B\u3001\u64CD\u4F5C\u7CFB\u7EDF\u4E4B\u5185\u5B58\u7BA1\u7406\u3001\u64CD\u4F5C\u7CFB\u7EDF\u4E4B\u5916\u8BBE\u4E0E\u6587\u4EF6\u7CFB\u7EDF",-1),de=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/yitiaolong-f5e91f0d-4b30-4693-beab-b879bac237b4.png",alt:""})],-1),be=t("\u89C6\u9891\u5730\u5740\uFF1A"),_e={href:"https://www.bilibili.com/video/BV1js411b7vg",target:"_blank",rel:"noopener noreferrer"},ge=t("https://www.bilibili.com/video/BV1js411b7vg"),ve=e("p",null,"\u5982\u679C\u60F3\u6DF1\u5165\u5B66\u4E60\u8BA1\u7B97\u673A\u7EC4\u6210\u539F\u7406\u7684\u8BDD\uFF0C\u63A8\u8350\u5317\u4EAC\u5927\u5B66\u7684\u300A\u8BA1\u7B97\u673A\u7EC4\u6210\u300B\u516C\u5F00\u8BFE\uFF0C\u6574\u4F53\u8BC4\u4EF7\u975E\u5E38\u9AD8\u3002",-1),ue=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/yitiaolong-6cc5a0d4-7a06-4aca-a9b0-2e8b270d36ba.png",alt:""})],-1),me=t("\u89C6\u9891\u5730\u5740\uFF1A"),fe={href:"https://www.coursera.org/learn/jisuanji-zucheng",target:"_blank",rel:"noopener noreferrer"},je=t("https://www.coursera.org/learn/jisuanji-zucheng"),Je=e("p",null,"\u8BA1\u7B97\u673A\u7F51\u7EDC\u65B9\u9762\u7684\u89C6\u9891\u6211\u63A8\u8350\u6E56\u79D1\u5927\u6559\u4E66\u5320\u7684\u300A\u8BA1\u7B97\u673A\u7F51\u7EDC\u5FAE\u8BFE\u5802\u300B\uFF0C\u5236\u4F5C\u5F97\u975E\u5E38\u7528\u5FC3\uFF0C\u662F\u4E00\u90E8\u4E0D\u53EF\u591A\u5F97\u7684\u4F73\u4F5C\u3002",-1),xe=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/yitiaolong-0686fbbf-723e-4a0b-8082-3b3577050758.png",alt:""})],-1),we=t("\u89C6\u9891\u5730\u5740\uFF1A"),ke={href:"https://www.bilibili.com/video/BV1c4411d7jb",target:"_blank",rel:"noopener noreferrer"},Be=t("https://www.bilibili.com/video/BV1c4411d7jb"),Se=n('<h3 id="_5-\u9879\u76EE\u7BA1\u7406\u4E0E\u67B6\u6784" tabindex="-1"><a class="header-anchor" href="#_5-\u9879\u76EE\u7BA1\u7406\u4E0E\u67B6\u6784" aria-hidden="true">#</a> 5\uFF09\u9879\u76EE\u7BA1\u7406\u4E0E\u67B6\u6784</h3><p>\u5B9E\u73B0\u4E00\u4E2A\u8F6F\u4EF6\u7CFB\u7EDF\u7684\u8FC7\u7A0B\uFF0C\u4E0D\u4EC5\u53EA\u6709\u7F16\u7801\uFF0C\u8FD8\u6D89\u53CA\u5230\u9879\u76EE\u5B89\u6392\uFF0C\u56E2\u961F\u534F\u8C03\u7B49\u4E00\u7CFB\u5217\u975E\u6280\u672F\u56E0\u7D20\uFF0C\u5982\u679C\u60F3\u4ECE\u4E00\u540D\u7A0B\u5E8F\u5458\u8D70\u5411\u7BA1\u7406\u5C97\uFF0C\u6210\u4E3A team leader \u6216\u8005\u5F00\u53D1\u7ECF\u7406\uFF0C\u8F6F\u4EF6\u5DE5\u7A0B\u65B9\u9762\u7684\u77E5\u8BC6\u5C31\u5FC5\u987B\u5F97\u8DDF\u5F97\u4E0A\u3002</p><p>\u63A8\u8350\u4E09\u672C\u4E66\uFF1A\u300A\u6784\u5EFA\u4E4B\u6CD5\u300B\u3001\u300A\u4EBA\u6708\u795E\u8BDD\u300B\u548C\u300A\u4EBA\u4EF6\u300B\uFF0C\u867D\u7136\u6709\u4E86\u5C81\u6708\u7684\u75D5\u8FF9\uFF0C\u4F46\u4F9D\u7136\u503C\u5F97\u6DF1\u8BFB\u3002\u5F53\u7136\uFF0C\u5173\u4E8E\u8F6F\u4EF6\u5DE5\u7A0B\uFF0C\u6700\u597D\u7684\u5B66\u4E60\u65B9\u6CD5\u662F\u89C2\u5BDF\uFF0C\u89C2\u5BDF\u4F60\u6240\u5728\u7684\u56E2\u961F\u662F\u5982\u4F55\u5904\u7406\u5DE5\u7A0B\u95EE\u9898\u7684\uFF0C\u7136\u540E\u601D\u8003\uFF0C\u6700\u7EC8\u5F62\u6210\u81EA\u5DF1\u7684\u65B9\u6CD5\u89C2\u3002</p><p>\u8981\u60F3\u5199\u51FA\u4E00\u4E2A\u597D\u800C\u7F8E\u7684\u7A0B\u5E8F\uFF0C\u9700\u8981\u7ECF\u8FC7\u4E09\u4E2A\u9636\u6BB5\u3002</p><p>\u7B2C\u4E00\u9636\u6BB5\uFF0C<strong>\u6709\u624E\u5B9E\u7684\u57FA\u672C\u529F</strong>\uFF0C\u7B80\u5355\u70B9\u8BF4\uFF0C\u5C31\u662F\u8981\u505A\u5230\u8BED\u6CD5\u719F\u7EC3\u3001\u6846\u67B6\u719F\u7EC3\uFF0C\u6210\u4E3A\u4E00\u540D\u80FD\u591F\u5B8C\u6210\u5F00\u53D1\u4EFB\u52A1\u7684\u201C\u7801\u519C\u201D\u3002</p><p>\u7B2C\u4E8C\u9636\u6BB5\uFF0C\u4ECE\u201C\u7801\u519C\u201D\u5230\u201C\u5DE5\u7A0B\u5E08\u201D\uFF0C\u5728\u5C40\u90E8\u4E0A\uFF0C\u4E0D\u4EC5\u8981\u80FD\u591F\u5B9E\u73B0\u529F\u80FD\uFF0C\u8FD8\u80FD\u5173\u6CE8\u529F\u80FD\u4E4B\u5916\u7684\u7EF4\u5EA6\uFF0C\u6BD4\u5982\u5065\u58EE\u6027\u3001\u4F4E\u8026\u5408\u3001\u53EF\u6269\u5C55\u7B49\u6307\u6807\u3002</p><p>\u7B2C\u4E09\u9636\u6BB5\uFF0C\u4ECE\u201C\u5DE5\u7A0B\u5E08\u201D\u5230\u201C\u67B6\u6784\u5E08\u201D\uFF0C\u4E0D\u4EC5\u5728\u5C40\u90E8\u4E0A\u8FFD\u6C42\u4E00\u4E2A\u6A21\u5757\u7684\u597D\u574F\uFF0C\u800C\u4E14\u8FD8\u8981\u4ECE\u6574\u4E2A\u7CFB\u7EDF\u5C42\u9762\u53BB\u638C\u63A7\uFF0C\u5408\u7406\u5B89\u6392\u8D44\u6E90\u7684\u4F18\u5148\u7EA7\uFF0C\u4FDD\u8BC1\u6574\u4E2A\u7CFB\u7EDF\u4E0D\u4F1A\u51FA\u73B0\u8150\u8D25\u7B49\u7B49\u3002</p><p>\u8981\u60F3\u6210\u4E3A\u4E00\u540D\u4F18\u79C0\u7684\u67B6\u6784\u5E08\uFF0C\u9664\u4E86\u81EA\u8EAB\u7684\u52AA\u529B\uFF0C\u4E5F\u9700\u8981\u4E00\u70B9\u70B9\u8FD0\u6C14\uFF0C\u4F46\u9760\u8BFB\u4E66\u53EF\u80FD\u4E0D\u591F\uFF0C\u4F46\u8FD9\u4E9B\u7ECF\u5178\u4E66\u7C4D\u8FD8\u662F\u8981\u9605\u8BFB\u7684\uFF0C\u80FD\u7ED9\u65E5\u5E38\u7684\u5DE5\u4F5C\u5E26\u6765\u5DE8\u5927\u7684\u5E2E\u52A9\u3002</p><ul><li>\u300A\u4EE3\u7801\u5927\u5168\u300B</li><li>\u300A\u91CD\u6784\uFF1A\u6539\u5584\u65E2\u6709\u4EE3\u7801\u7684\u8BBE\u8BA1\u300B</li><li>\u300A\u8BBE\u8BA1\u539F\u672C\u300B</li><li>\u300A\u5927\u578B\u7F51\u7AD9\u6280\u672F\u67B6\u6784\u6838\u5FC3\u539F\u7406\u4E0E\u6848\u4F8B\u5206\u6790\u300B</li></ul><h2 id="\u6700\u540E" tabindex="-1"><a class="header-anchor" href="#\u6700\u540E" aria-hidden="true">#</a> \u6700\u540E</h2><p>\u5B66\u4E60\u7684\u8FC7\u7A0B\uFF0C\u5C31\u597D\u50CF\u767B\u5C71\u4E00\u6837\uFF0C\u5927\u6982\u6709 80% \u7684\u4EBA\u5728\u8FD9\u4E2A\u8FC7\u7A0B\u4E2D\u4F1A\u6389\u961F\u3002\u90A3\u4E48\u8BF7\u76F8\u4FE1\u6211\uFF0C\u53EA\u8981\u76EE\u6807\u660E\u786E\uFF0C\u52AA\u529B\u52A0\u4E0A\u575A\u6301\uFF0C\u518D\u52A0\u4E0A\u4E00\u70B9\u70B9\u597D\u8FD0\u6C14\uFF0C\u4F60\u5C31\u80FD\u767B\u9876\uFF01</p><p>\u6700\u540E\u8BF4\u4E00\u53E5\u54C8\uFF0C\u5927\u5BB6\u5B66\u4E60 Java\uFF0C\u662F\u4E3A\u4E86\u4EC0\u4E48\uFF0C\u6211\u60F3\u5927\u591A\u6570\u4E0D\u662F\u4E3A\u4E86\u5174\u8DA3\uFF0C\u662F\u5427\uFF1F\u662F\u4E3A\u4E86\u627E\u5DE5\u4F5C\uFF0C\u90A3\u4E48\u7EC8\u6781\u7684\u4E00\u6B65\uFF0C\u6211\u4EEC\u9700\u8981\u5728\u627E\u5DE5\u4F5C\u4E4B\u524D\u5237\u4E00\u6CE2\u9762\u8BD5\u9898\uFF0C\u7136\u540E\u627E\u5DE5\u4F5C\u7684\u673A\u4F1A\u4E5F\u4F1A\u63D0\u5347\u5F88\u591A\u3002Java \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF\u4E0A\u4E5F\u4E3A\u5927\u5BB6\u7CBE\u5FC3\u51C6\u5907\u4E86\u9762\u6E23\u9006\u88AD\u7BC7\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/yitiaolong-314e94ce-aa9d-4f09-831b-d1395c4fc07a.png" alt=""></p><p>\u901A\u8FC7\u4E0A\u9762\u8FD9\u5E45\u56FE\u5C31\u80FD\u611F\u53D7\u5F97\u5230\uFF0C\u975E\u5E38\u5168\u9762\uFF0C\u975E\u5E38\u7CBE\u5F69\u3002</p><blockquote><p>\u5B66\u4E60\u5730\u5740\uFF1A<a href="/sidebar/sanfene/nixi">\u9762\u6E23\u9006\u88AD</a></p></blockquote><p>\u8877\u5FC3\u7684\u5E0C\u671B\uFF0C\u5927\u5BB6\u90FD\u80FD\u5728\u5B66\u4E60 Java \u7684\u8FD9\u6761\u8DEF\u4E0A\u5FEB\u4E50\u4E00\u4E9B\uFF0C\u7EAF\u7CB9\u4E00\u4E9B\uFF0C\u5C11\u542C\u5C11\u770B\u4E00\u4E9B\u90A3\u4E9B\u7126\u8651\u6587\uFF0C\u4EC0\u4E48 35 \u5C81\uFF0C\u4EC0\u4E48\u5B66\u5386\u6B67\u89C6\uFF0C\u6C89\u4E0B\u5FC3\u6765\uFF0C\u591A\u5B66\u4E60\u4E00\u70B9\u77E5\u8BC6\uFF0C\u8BA9\u81EA\u5DF1\u53D8\u5F3A\u4E00\u70B9\uFF0C\u6BD4\u4EC0\u4E48\u90FD\u597D\uFF01</p><p>\u53E6\u5916\uFF0C\u9700\u8981 Java \u5B66\u4E60\u8D44\u6599\u7684\u8BDD\uFF0C\u53EF\u4EE5\u76F4\u63A5\u6233\u6211\u6574\u7406\u7684\u8FD9\u4E2A GitHub/\u7801\u4E91\u4ED3\u5E93\u2014\u2014\u{1F4DA}Java\u7A0B\u5E8F\u5458\u5FC5\u8BFB\u4E66\u5355\u6574\u7406\uFF0C\u9644\u4E0B\u8F7D\u5730\u5740\uFF0C\u52A9\u529B\u6BCF\u4E00\u4E2AJava\u7A0B\u5E8F\u5458\u6784\u5EFA\u5C5E\u4E8E\u81EA\u5DF1\u7684\u77E5\u8BC6\u4F53\u7CFB\u3002\u5305\u62EC\u4F46\u4E0D\u9650\u4E8EJava\u3001\u8BBE\u8BA1\u6A21\u5F0F\u3001\u8BA1\u7B97\u673A\u7F51\u7EDC\u3001\u64CD\u4F5C\u7CFB\u7EDF\u3001\u6570\u636E\u5E93\u3001\u6570\u636E\u7ED3\u6784\u4E0E\u7B97\u6CD5\u3001\u5927\u6570\u636E\u3001\u67B6\u6784\u3001\u9762\u8BD5\u7B49\u7B49\u3002</p>',17),Me=t("GitHub \u5730\u5740\uFF1A"),ye={href:"https://github.com/itwanger/JavaBooks",target:"_blank",rel:"noopener noreferrer"},Ve=t("https://github.com/itwanger/JavaBooks"),Ce=t("\u7801\u4E91\u5730\u5740\uFF1A"),De={href:"https://gitee.com/itwanger/JavaBooks",target:"_blank",rel:"noopener 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time\uFF09\uFF0C\u8DDF\u8FD0\u884C\u9636\u6BB5\uFF08\u53C8\u79F0\u4E3A\u201C\u8FD0\u884C\u65F6\u201D\uFF09\u76F8\u533A\u5206\u3002</p><p>C\u8BED\u8A00\u4E2D\uFF0C\u6307\u9488\u662F\u4EE4\u521D\u5B66\u8005\u5934\u75DB\u7684\u4E00\u5757\u5185\u5BB9\uFF0C\u6240\u4EE5\u6211\u8FD9\u91CC\u7B80\u5355\u7ED9\u5927\u5BB6\u804A\u4E24\u53E5\u3002</p><p><strong>\u6307\u9488\u662F\u4EC0\u4E48\uFF1F\u5B83\u662F\u4E00\u4E2A\u503C\uFF0C\u8FD9\u4E2A\u503C\u4EE3\u8868\u4E00\u4E2A\u5185\u5B58\u5730\u5740\uFF0C\u56E0\u6B64\uFF0C\u6307\u9488\u5C31\u76F8\u5F53\u4E8E\u6307\u5411\u67D0\u4E2A\u5185\u5B58\u5730\u5740\u7684\u8DEF\u6807</strong>\u3002</p><p>\u5B57\u7B26*\u8868\u793A\u6307\u9488\uFF0C\u901A\u5E38\u8DDF\u5728\u7C7B\u578B\u5173\u952E\u5B57\u7684\u540E\u9762\uFF0C\u8868\u793A\u6307\u9488\u6307\u5411\u7684\u662F\u4EC0\u4E48\u7C7B\u578B\u7684\u503C\u3002\u6BD4\u5982\uFF0C<code>char*</code>\u8868\u793A\u4E00\u4E2A\u6307\u5411\u5B57\u7B26\u7684\u6307\u9488\uFF0C<code>float*</code>\u8868\u793A\u4E00\u4E2A\u6307\u5411float\u7C7B\u578B\u7684\u503C\u7684\u6307\u9488\u3002</p><p>*\u8FD9\u4E2A\u7B26\u53F7\u9664\u4E86\u8868\u793A\u6307\u9488\u4EE5\u5916\uFF0C\u8FD8\u53EF\u4EE5\u4F5C\u4E3A\u8FD0\u7B97\u7B26\uFF0C\u7528\u6765\u53D6\u51FA\u6307\u9488\u53D8\u91CF\u6240\u6307\u5411\u7684\u5185\u5B58\u5730\u5740\u91CC\u9762\u7684\u503C\u3002</p><p>\u800C&amp;\u8FD0\u7B97\u7B26\u7528\u6765\u53D6\u51FA\u4E00\u4E2A\u53D8\u91CF\u6240\u5728\u7684\u5185\u5B58\u5730\u5740\u3002</p><p>\u80CC\u4F1A\u7406\u89E3\u4E86\u8FD9\u51E0\u53E5\uFF0C\u53EF\u4EE5\u8BF4\u6307\u9488\u7684\u7406\u8BBA\u57FA\u7840\u5C31\u6709\u4E86\u3002\u8DE8\u8FC7\u53BB\u6307\u9488\u8FD9\u4E00\u5173\uFF0CC 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alt="\u626B\u7801\u5173\u6CE8\u540E\u56DE\u590D\u300C08\u300D\u5173\u952E\u5B57"></p><p>\u4E5F\u53EF\u4EE5\u5FAE\u4FE1\u641C\u300C<strong>\u6C89\u9ED8\u738B\u4E8C</strong>\u300D\u5173\u6CE8\u540E\u56DE\u590D\u5173\u952E\u5B57\u300C<strong>08</strong>\u300D\u3002</p><p>OK\uFF0C\u4ECA\u5929\u5C31\u7B80\u5355\u804A\u5230\u8FD9\u91CC\uFF0C\u5E0C\u671B\u962E\u4E00\u5CF0\u8001\u5E08\u7684\u8FD9\u4EFD\u6559\u7A0B\u80FD\u5E2E\u52A9\u5230\u5927\u5BB6\u3002\u6211\u4EEC\u4E0B\u671F\u89C1~</p>',44),c=[r];function a(s,g){return t(),o("div",null,c)}var l=p(n,[["render",a],["__file","yuanyifeng-c-language.html.vue"]]);export{l as default};
diff --git a/dist/assets/yuanyifeng-c-language.html.90250cb3.js b/dist/assets/yuanyifeng-c-language.html.90250cb3.js
new file mode 100644
index 00000000..b15d334b
--- /dev/null
+++ b/dist/assets/yuanyifeng-c-language.html.90250cb3.js
@@ -0,0 +1 @@
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time\uFF09\uFF0C\u8DDF\u8FD0\u884C\u9636\u6BB5\uFF08\u53C8\u79F0\u4E3A\u201C\u8FD0\u884C\u65F6\u201D\uFF09\u76F8\u533A\u5206\u3002</p><p>C\u8BED\u8A00\u4E2D\uFF0C\u6307\u9488\u662F\u4EE4\u521D\u5B66\u8005\u5934\u75DB\u7684\u4E00\u5757\u5185\u5BB9\uFF0C\u6240\u4EE5\u6211\u8FD9\u91CC\u7B80\u5355\u7ED9\u5927\u5BB6\u804A\u4E24\u53E5\u3002</p><p><strong>\u6307\u9488\u662F\u4EC0\u4E48\uFF1F\u5B83\u662F\u4E00\u4E2A\u503C\uFF0C\u8FD9\u4E2A\u503C\u4EE3\u8868\u4E00\u4E2A\u5185\u5B58\u5730\u5740\uFF0C\u56E0\u6B64\uFF0C\u6307\u9488\u5C31\u76F8\u5F53\u4E8E\u6307\u5411\u67D0\u4E2A\u5185\u5B58\u5730\u5740\u7684\u8DEF\u6807</strong>\u3002</p><p>\u5B57\u7B26*\u8868\u793A\u6307\u9488\uFF0C\u901A\u5E38\u8DDF\u5728\u7C7B\u578B\u5173\u952E\u5B57\u7684\u540E\u9762\uFF0C\u8868\u793A\u6307\u9488\u6307\u5411\u7684\u662F\u4EC0\u4E48\u7C7B\u578B\u7684\u503C\u3002\u6BD4\u5982\uFF0C<code>char*</code>\u8868\u793A\u4E00\u4E2A\u6307\u5411\u5B57\u7B26\u7684\u6307\u9488\uFF0C<code>float*</code>\u8868\u793A\u4E00\u4E2A\u6307\u5411float\u7C7B\u578B\u7684\u503C\u7684\u6307\u9488\u3002</p><p>*\u8FD9\u4E2A\u7B26\u53F7\u9664\u4E86\u8868\u793A\u6307\u9488\u4EE5\u5916\uFF0C\u8FD8\u53EF\u4EE5\u4F5C\u4E3A\u8FD0\u7B97\u7B26\uFF0C\u7528\u6765\u53D6\u51FA\u6307\u9488\u53D8\u91CF\u6240\u6307\u5411\u7684\u5185\u5B58\u5730\u5740\u91CC\u9762\u7684\u503C\u3002</p><p>\u800C&amp;\u8FD0\u7B97\u7B26\u7528\u6765\u53D6\u51FA\u4E00\u4E2A\u53D8\u91CF\u6240\u5728\u7684\u5185\u5B58\u5730\u5740\u3002</p><p>\u80CC\u4F1A\u7406\u89E3\u4E86\u8FD9\u51E0\u53E5\uFF0C\u53EF\u4EE5\u8BF4\u6307\u9488\u7684\u7406\u8BBA\u57FA\u7840\u5C31\u6709\u4E86\u3002\u8DE8\u8FC7\u53BB\u6307\u9488\u8FD9\u4E00\u5173\uFF0CC 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alt="\u626B\u7801\u5173\u6CE8\u540E\u56DE\u590D\u300C08\u300D\u5173\u952E\u5B57"></p><p>\u4E5F\u53EF\u4EE5\u5FAE\u4FE1\u641C\u300C<strong>\u6C89\u9ED8\u738B\u4E8C</strong>\u300D\u5173\u6CE8\u540E\u56DE\u590D\u5173\u952E\u5B57\u300C<strong>08</strong>\u300D\u3002</p><p>OK\uFF0C\u4ECA\u5929\u5C31\u7B80\u5355\u804A\u5230\u8FD9\u91CC\uFF0C\u5E0C\u671B\u962E\u4E00\u5CF0\u8001\u5E08\u7684\u8FD9\u4EFD\u6559\u7A0B\u80FD\u5E2E\u52A9\u5230\u5927\u5BB6\u3002\u6211\u4EEC\u4E0B\u671F\u89C1~</p>',12);function k(x,j){const e=r("ExternalLinkIcon");return c(),s("div",null,[g,i,t("blockquote",null,[t("p",null,[t("a",d,[_,n(e)])])]),C,t("blockquote",null,[t("p",null,[t("a",u,[h,n(e)])])]),m,t("blockquote",null,[t("p",null,[b,t("a",f,[v,n(e)])])]),w])}var q=a(l,[["render",k],["__file","yuanyifeng-c-language.html.vue"]]);export{q as default};
diff --git a/dist/assets/yuanyifeng-c-language.html.dbcc3d40.js b/dist/assets/yuanyifeng-c-language.html.dbcc3d40.js
new file mode 100644
index 00000000..9241ed04
--- /dev/null
+++ b/dist/assets/yuanyifeng-c-language.html.dbcc3d40.js
@@ -0,0 +1 @@
+const t={key:"v-ed798b2e",path:"/download/yuanyifeng-c-language.html",title:"\u{1F44F}\u4E0B\u8F7D\u2192\u962E\u4E00\u5CF0C\u8BED\u8A00\u5165\u95E8\u6559\u7A0B",lang:"zh-CN",frontmatter:{title:"\u{1F44F}\u4E0B\u8F7D\u2192\u962E\u4E00\u5CF0C\u8BED\u8A00\u5165\u95E8\u6559\u7A0B",shortTitle:"\u962E\u4E00\u5CF0C\u8BED\u8A00\u5165\u95E8\u6559\u7A0B",category:["\u5B66\u4E60\u8D44\u6E90"],tag:["PDF"],summary:'\u7ED9\u5927\u5BB6\u62A5\u544A\u4E0B\uFF0C\u962E\u4E00\u5CF0\u8001\u5E08\u7684\u300AC\u8BED\u8A00\u5165\u95E8\u6559\u7A0B\u300B\u4E8E 2021 \u5E74 9 \u6708 7 \u65E5\u4E0A\u7EBF\u4E86\uFF01 \u5BF9\uFF0C\u548C\u5F80\u5E38\u4E00\u6837\uFF0C\u8FD9\u4E2A\u6559\u7A0B\u662F\u5F00\u6E90\u7684\uFF0C\u91C7\u7528\u77E5\u8BC6\u5171\u4EAB\u8BB8\u53EF\u8BC1\uFF0C\u6E90\u7801\u6258\u7BA1\u5728 GitHub\uFF0C\u5927\u5BB6\u53EF\u4EE5\u81EA\u7531\u4F7F\u7528\u3002 "https://github.com/wangdoc/clang-tutorial" \u5728\u7EBF\u9605\u8BFB\u5730\u5740\u4E5F\u6709\uFF1A "https://wangdoc.com/clang/" \u6211\u7B2C\u4E00\u65F6',head:[["meta",{property:"og:url",content:"https://tobebetterjavaer.com/download/yuanyifeng-c-language.html"}],["meta",{property:"og:site_name",content:"Java \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF"}],["meta",{property:"og:title",content:"\u{1F44F}\u4E0B\u8F7D\u2192\u962E\u4E00\u5CF0C\u8BED\u8A00\u5165\u95E8\u6559\u7A0B"}],["meta",{property:"og:type",content:"article"}],["meta",{property:"og:updated_time",content:"2022-06-11T12:15:48.000Z"}],["meta",{property:"og:locale",content:"zh-CN"}],["meta",{property:"article:tag",content:"PDF"}],["meta",{property:"article:modified_time",content:"2022-06-11T12:15:48.000Z"}]]},excerpt:"",headers:[],git:{createdTime:1647569962e3,updatedTime:1654949748e3,contributors:[{name:"itwanger",email:"www.qing_gee@163.com",commits:2}]},readingTime:{minutes:5.53,words:1660},filePathRelative:"download/yuanyifeng-c-language.md"};export{t as data};
diff --git a/dist/assets/yuneban-wangyiyunyinyue.html.df2c1c62.js b/dist/assets/yuneban-wangyiyunyinyue.html.83ef1711.js
similarity index 99%
rename from dist/assets/yuneban-wangyiyunyinyue.html.df2c1c62.js
rename to dist/assets/yuneban-wangyiyunyinyue.html.83ef1711.js
index 2acbcfd2..ba67e2c5 100644
--- a/dist/assets/yuneban-wangyiyunyinyue.html.df2c1c62.js
+++ b/dist/assets/yuneban-wangyiyunyinyue.html.83ef1711.js
@@ -1,4 +1,4 @@
-import{_ as e}from"./plugin-vue_export-helper.21dcd24c.js";import{o as i,c as n,e as a}from"./app.a0271b9c.js";const r={},t=a(`<h1 id="\u4E91\u97F3\u4E50" tabindex="-1"><a class="header-anchor" href="#\u4E91\u97F3\u4E50" aria-hidden="true">#</a> \u4E91\u97F3\u4E50</h1><p>\u5927\u5BB6\u597D\uFF0C\u6211\u662F\u4E8C\u54E5\u5440\uFF01</p><p>\u524D\u6BB5\u65F6\u95F4\uFF0C\u6709\u4E2A\u8BFB\u8005\u79C1\u4FE1\u6211\u8BF4\uFF0C<strong>\u521A\u5B66\u5B8C Spring Boot\uFF0C\u60F3\u627E\u70B9\u7EC3\u624B\u9879\u76EE\uFF0C\u51C6\u5907\u627E\u5B9E\u4E60\u4E86\u3002</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/kaiyuan/yuneban-wangyiyunyinyue-01.png" alt=""></p><p>\u4E8C\u54E5\u8FD9\u4E48\u8D34\u5FC3\uFF0C\u5BF9\u4E8E\u8BFB\u8005\u7684\u8BF7\u6C42\uFF0C\u4E00\u5411\u662F\u6709\u6C42\u5FC5\u5E94\uFF0C\u6709\u95EE\u5FC5\u7B54\u3002\u90A3\u81EA\u7136\u5F97\u82B1\u5FC3\u601D\u53BB\u6DD8 2 \u4E2A\u50CF\u6837\u7684 Java \u7EC3\u624B\u9879\u76EE\u51FA\u6765\u4E86\uFF0C\u5173\u952E\u662F\u8FD8\u8981\u57FA\u7840\uFF0C\u4E0D\u80FD\u592A\u96BE\u{1F606}\u3002</p><p>\u6211\u4E4B\u524D\u6709\u7ED9\u5927\u5BB6\u63A8\u8350\u8FC7 GitHub \u4E0A\u7684 vhr\u3001mall \u548C miaosha\uFF0C\u90A3\u8FD9\u6B21\u60F3\u6362\u4E2A\u601D\u8DEF\uFF0C\u5230 B \u7AD9\u4E0A\u6DD8\u4E00\u6DD8\u5982\u4F55\u5462\uFF1F</p><p>\u679C\u771F\uFF0C\u8FD8\u771F\u8BA9\u4E8C\u54E5\u627E\u5230\u4E86\uFF01\u5C0F\u7834\u7AD9\uFF0CYYDS\uFF01</p><h3 id="\u4E00\u3001\u4E91-e-\u529E" tabindex="-1"><a class="header-anchor" href="#\u4E00\u3001\u4E91-e-\u529E" aria-hidden="true">#</a> \u4E00\u3001\u4E91 E \u529E</h3><p>\u8FD9\u662F\u4E00\u4E2A\u5E26\u5927\u5BB6\u4ECE 0 \u642D\u5EFA\u4E00\u4E2A Spring Boot+ Vue \u7684\u524D\u540E\u7AEF\u5206\u79BB\u7684 Java \u9879\u76EE\uFF0C\u524D P71 \u8BB2\u524D\u7AEF\uFF0CP72 \u5230 P131 \u8BB2\u540E\u7AEF\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/kaiyuan/yuneban-wangyiyunyinyue-02.png" alt=""></p><p>\u524D\u7AEF\u6D89\u53CA\u5230\u7684\u6280\u672F\u6709 Vue \u5168\u5BB6\u6876\u3001ElementUI\uFF1B\u540E\u7AEF\u6D89\u53CA\u5230\u7684\u6280\u672F\u6709 Spring Boot\u3001SpringMVC\u3001MyBatisPlus\u3001SpringSecurity\u3001Swagger\u3001Redis\u3001EasyPOI\u3001RabbitMQ\u3001FasfDFS \u7B49\u7B49\u3002</p><p>\u89C6\u9891\u6574\u4F53\u4E0A\u662F\u4E0D\u9519\u7684\uFF0Cup \u7684\u58F0\u97F3\u4E5F\u5F88\u6E05\u6670\uFF0C\u542C\u8D77\u6765\u5F88\u8212\u670D\u3002</p><p>\u4E3A\u4E86\u9A8C\u8BC1 up \u662F\u4E0D\u662F\u4E00\u5BB6\u57F9\u8BAD\u673A\u6784\uFF0C\u987A\u5E26\u66FF\u5927\u5BB6\u8E29\u8E29\u5751\u3002\u6211\u6309\u7167\u8981\u6C42\u52A0\u4E86\u5C0F\u52A9\u7406\u7684\u5FAE\u4FE1\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/kaiyuan/yuneban-wangyiyunyinyue-03.png" alt=""></p><p>\u52A0\u597D\u53CB\u65F6\u4E00\u770B\u5934\u50CF\uFF0C\u548C\u5E73\u5E38\u5077\u5077\u6478\u6478\u6DF7\u8FDB\u7FA4\u7684\u5E7F\u544A\u515A\u5DEE\u4E0D\u591A\uFF0C\u54C8\u54C8\u54C8\u3002</p><p>\u901A\u8FC7\u597D\u53CB\u540E\uFF0C\u518D\u53BB\u4E00\u67E5\u300C\u4E50\u5B57\u8282\u300D\u8FD9\u4E2A\u5173\u952E\u5B57\uFF0C\u679C\u7136\u662F\u4E00\u5BB6\u57F9\u8BAD\u673A\u6784\uFF0C\u4E0D\u8FC7\u89C6\u9891\u65E2\u7136\u516C\u5F00\u4E86\u51FA\u6765\uFF0C\u5E76\u4E14\u8D28\u91CF\u4E5F\u8BF4\u5F97\u8FC7\u53BB\uFF0C\u90A3\u679C\u65AD\u5B66\u4E60\u4E00\u6CE2\u4E5F\u662F\u5F88\u8212\u670D\u7684\u3002</p><p>\u6709\u65F6\u5019\uFF0C\u57F9\u8BAD\u673A\u6784\u516C\u5F00\u51FA\u6765\u7684\u89C6\u9891\u8BFE\u53EF\u80FD\u8981\u597D\u8FC7\u4ED8\u8D39\u5C0F\u51E0\u4E07\u7684\u4ED8\u8D39\u89C6\u9891\u8BFE\uFF0C\u6BD5\u7ADF\u62FF\u51FA\u6765\u7684\u4E1C\u897F\u4E0D\u80FD\u592A\u6C34\uFF0C\u5426\u5219\u4F1A\u7838\u4E86\u81EA\u5DF1\u62DB\u724C\u3002</p><p>\u51B5\u4E14\uFF0C\u4E8C\u54E5\u6DF1\u5165\u864E\u7A74\u8FD9\u4E00\u6CE2\u4E5F\u66FF\u5927\u5BB6\u8E29\u8FC7\u5751\u4E86\uFF0C\u6E90\u7801\u548C\u8BFE\u4EF6\u90FD\u62FF\u5230\u4E86\uFF0C\u76F4\u63A5\u5728\u516C\u4F17\u53F7\u540E\u53F0\u56DE\u590D\u5173\u952E\u5B57\u300C<strong>B\u7AD9</strong>\u300D\u5C31\u53EF\u4EE5\u62C9\u53D6\u5230\u4E86\uFF0C\u4E0D\u7528\u518D\u53BB\u52A0\u5C0F\u52A9\u7406\u5FAE\u4FE1\u4E86\uFF0C\u5927\u5BB6\u53EF\u4EE5\u653E\u5FC3\u98DF\u7528\u3002</p><p>\u600E\u4E48\u6837\uFF0C\u4E8C\u54E5\u8FD9\u6CE2\u5B89\u5168\u62E6\u622A\u505A\u5F97\u6F02\u4EAE\u5427\uFF1F</p><h3 id="\u4E8C\u3001\u4EFF\u7F51\u6613\u4E91\u97F3\u4E50\u7684\u5C0F\u7F51\u7AD9" tabindex="-1"><a class="header-anchor" href="#\u4E8C\u3001\u4EFF\u7F51\u6613\u4E91\u97F3\u4E50\u7684\u5C0F\u7F51\u7AD9" aria-hidden="true">#</a> \u4E8C\u3001\u4EFF\u7F51\u6613\u4E91\u97F3\u4E50\u7684\u5C0F\u7F51\u7AD9</h3><p>\u8FD9\u662F\u8BFB\u8005\u63D0\u4F9B\u7684\u4E00\u4E2A\u524D\u540E\u7AEF\u5206\u79BB\u9879\u76EE\uFF0C\u95EE\u6211\u9879\u76EE\u600E\u4E48\u6837\uFF0C\u6211\u70B9\u5F00\u53BB\u4E00\u770B\uFF0C\u8FD9\u4E0D\u4E00\u4E2A\u53F7\u4E3B\u670B\u53CB\u7684\u561B\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/kaiyuan/yuneban-wangyiyunyinyue-04.png" alt=""></p><p>\u7F51\u7AD9\u7684\u5BA2\u6237\u7AEF\u548C\u7BA1\u7406\u7AEF\u4F7F\u7528 VUE \u6846\u67B6\u6765\u5B9E\u73B0\u7684\uFF0C\u670D\u52A1\u7AEF\u4F7F\u7528 Spring Boot + MyBatis \u6765\u5B9E\u73B0\uFF0C\u6570\u636E\u5E93\u4F7F\u7528\u4E86 MySQL\u3002\u5EFA\u8BAE\u81F3\u5C11 1.5 \u500D\u901F\u98DF\u7528\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/kaiyuan/yuneban-wangyiyunyinyue-05.png" alt=""></p><p>\u524D\u540E\u7AEF\u6574\u4F53\u7684\u9879\u76EE\u7ED3\u6784\u4E5F\u633A\u6E05\u6670\u7684\uFF0C\u8FD9\u662F\u540E\u7AEF\u7684\u3002</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>\u251C\u2500\u2500 avatorImages // \u7528\u6237\u5934\u50CF
+import{_ as e}from"./plugin-vue_export-helper.21dcd24c.js";import{o as i,c as n,e as a}from"./app.615e41d8.js";const r={},t=a(`<h1 id="\u4E91\u97F3\u4E50" tabindex="-1"><a class="header-anchor" href="#\u4E91\u97F3\u4E50" aria-hidden="true">#</a> \u4E91\u97F3\u4E50</h1><p>\u5927\u5BB6\u597D\uFF0C\u6211\u662F\u4E8C\u54E5\u5440\uFF01</p><p>\u524D\u6BB5\u65F6\u95F4\uFF0C\u6709\u4E2A\u8BFB\u8005\u79C1\u4FE1\u6211\u8BF4\uFF0C<strong>\u521A\u5B66\u5B8C Spring Boot\uFF0C\u60F3\u627E\u70B9\u7EC3\u624B\u9879\u76EE\uFF0C\u51C6\u5907\u627E\u5B9E\u4E60\u4E86\u3002</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/kaiyuan/yuneban-wangyiyunyinyue-01.png" alt=""></p><p>\u4E8C\u54E5\u8FD9\u4E48\u8D34\u5FC3\uFF0C\u5BF9\u4E8E\u8BFB\u8005\u7684\u8BF7\u6C42\uFF0C\u4E00\u5411\u662F\u6709\u6C42\u5FC5\u5E94\uFF0C\u6709\u95EE\u5FC5\u7B54\u3002\u90A3\u81EA\u7136\u5F97\u82B1\u5FC3\u601D\u53BB\u6DD8 2 \u4E2A\u50CF\u6837\u7684 Java \u7EC3\u624B\u9879\u76EE\u51FA\u6765\u4E86\uFF0C\u5173\u952E\u662F\u8FD8\u8981\u57FA\u7840\uFF0C\u4E0D\u80FD\u592A\u96BE\u{1F606}\u3002</p><p>\u6211\u4E4B\u524D\u6709\u7ED9\u5927\u5BB6\u63A8\u8350\u8FC7 GitHub \u4E0A\u7684 vhr\u3001mall \u548C miaosha\uFF0C\u90A3\u8FD9\u6B21\u60F3\u6362\u4E2A\u601D\u8DEF\uFF0C\u5230 B \u7AD9\u4E0A\u6DD8\u4E00\u6DD8\u5982\u4F55\u5462\uFF1F</p><p>\u679C\u771F\uFF0C\u8FD8\u771F\u8BA9\u4E8C\u54E5\u627E\u5230\u4E86\uFF01\u5C0F\u7834\u7AD9\uFF0CYYDS\uFF01</p><h3 id="\u4E00\u3001\u4E91-e-\u529E" tabindex="-1"><a class="header-anchor" href="#\u4E00\u3001\u4E91-e-\u529E" aria-hidden="true">#</a> \u4E00\u3001\u4E91 E \u529E</h3><p>\u8FD9\u662F\u4E00\u4E2A\u5E26\u5927\u5BB6\u4ECE 0 \u642D\u5EFA\u4E00\u4E2A Spring Boot+ Vue \u7684\u524D\u540E\u7AEF\u5206\u79BB\u7684 Java \u9879\u76EE\uFF0C\u524D P71 \u8BB2\u524D\u7AEF\uFF0CP72 \u5230 P131 \u8BB2\u540E\u7AEF\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/kaiyuan/yuneban-wangyiyunyinyue-02.png" alt=""></p><p>\u524D\u7AEF\u6D89\u53CA\u5230\u7684\u6280\u672F\u6709 Vue \u5168\u5BB6\u6876\u3001ElementUI\uFF1B\u540E\u7AEF\u6D89\u53CA\u5230\u7684\u6280\u672F\u6709 Spring Boot\u3001SpringMVC\u3001MyBatisPlus\u3001SpringSecurity\u3001Swagger\u3001Redis\u3001EasyPOI\u3001RabbitMQ\u3001FasfDFS \u7B49\u7B49\u3002</p><p>\u89C6\u9891\u6574\u4F53\u4E0A\u662F\u4E0D\u9519\u7684\uFF0Cup \u7684\u58F0\u97F3\u4E5F\u5F88\u6E05\u6670\uFF0C\u542C\u8D77\u6765\u5F88\u8212\u670D\u3002</p><p>\u4E3A\u4E86\u9A8C\u8BC1 up \u662F\u4E0D\u662F\u4E00\u5BB6\u57F9\u8BAD\u673A\u6784\uFF0C\u987A\u5E26\u66FF\u5927\u5BB6\u8E29\u8E29\u5751\u3002\u6211\u6309\u7167\u8981\u6C42\u52A0\u4E86\u5C0F\u52A9\u7406\u7684\u5FAE\u4FE1\uFF1A</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/kaiyuan/yuneban-wangyiyunyinyue-03.png" alt=""></p><p>\u52A0\u597D\u53CB\u65F6\u4E00\u770B\u5934\u50CF\uFF0C\u548C\u5E73\u5E38\u5077\u5077\u6478\u6478\u6DF7\u8FDB\u7FA4\u7684\u5E7F\u544A\u515A\u5DEE\u4E0D\u591A\uFF0C\u54C8\u54C8\u54C8\u3002</p><p>\u901A\u8FC7\u597D\u53CB\u540E\uFF0C\u518D\u53BB\u4E00\u67E5\u300C\u4E50\u5B57\u8282\u300D\u8FD9\u4E2A\u5173\u952E\u5B57\uFF0C\u679C\u7136\u662F\u4E00\u5BB6\u57F9\u8BAD\u673A\u6784\uFF0C\u4E0D\u8FC7\u89C6\u9891\u65E2\u7136\u516C\u5F00\u4E86\u51FA\u6765\uFF0C\u5E76\u4E14\u8D28\u91CF\u4E5F\u8BF4\u5F97\u8FC7\u53BB\uFF0C\u90A3\u679C\u65AD\u5B66\u4E60\u4E00\u6CE2\u4E5F\u662F\u5F88\u8212\u670D\u7684\u3002</p><p>\u6709\u65F6\u5019\uFF0C\u57F9\u8BAD\u673A\u6784\u516C\u5F00\u51FA\u6765\u7684\u89C6\u9891\u8BFE\u53EF\u80FD\u8981\u597D\u8FC7\u4ED8\u8D39\u5C0F\u51E0\u4E07\u7684\u4ED8\u8D39\u89C6\u9891\u8BFE\uFF0C\u6BD5\u7ADF\u62FF\u51FA\u6765\u7684\u4E1C\u897F\u4E0D\u80FD\u592A\u6C34\uFF0C\u5426\u5219\u4F1A\u7838\u4E86\u81EA\u5DF1\u62DB\u724C\u3002</p><p>\u51B5\u4E14\uFF0C\u4E8C\u54E5\u6DF1\u5165\u864E\u7A74\u8FD9\u4E00\u6CE2\u4E5F\u66FF\u5927\u5BB6\u8E29\u8FC7\u5751\u4E86\uFF0C\u6E90\u7801\u548C\u8BFE\u4EF6\u90FD\u62FF\u5230\u4E86\uFF0C\u76F4\u63A5\u5728\u516C\u4F17\u53F7\u540E\u53F0\u56DE\u590D\u5173\u952E\u5B57\u300C<strong>B\u7AD9</strong>\u300D\u5C31\u53EF\u4EE5\u62C9\u53D6\u5230\u4E86\uFF0C\u4E0D\u7528\u518D\u53BB\u52A0\u5C0F\u52A9\u7406\u5FAE\u4FE1\u4E86\uFF0C\u5927\u5BB6\u53EF\u4EE5\u653E\u5FC3\u98DF\u7528\u3002</p><p>\u600E\u4E48\u6837\uFF0C\u4E8C\u54E5\u8FD9\u6CE2\u5B89\u5168\u62E6\u622A\u505A\u5F97\u6F02\u4EAE\u5427\uFF1F</p><h3 id="\u4E8C\u3001\u4EFF\u7F51\u6613\u4E91\u97F3\u4E50\u7684\u5C0F\u7F51\u7AD9" tabindex="-1"><a class="header-anchor" href="#\u4E8C\u3001\u4EFF\u7F51\u6613\u4E91\u97F3\u4E50\u7684\u5C0F\u7F51\u7AD9" aria-hidden="true">#</a> \u4E8C\u3001\u4EFF\u7F51\u6613\u4E91\u97F3\u4E50\u7684\u5C0F\u7F51\u7AD9</h3><p>\u8FD9\u662F\u8BFB\u8005\u63D0\u4F9B\u7684\u4E00\u4E2A\u524D\u540E\u7AEF\u5206\u79BB\u9879\u76EE\uFF0C\u95EE\u6211\u9879\u76EE\u600E\u4E48\u6837\uFF0C\u6211\u70B9\u5F00\u53BB\u4E00\u770B\uFF0C\u8FD9\u4E0D\u4E00\u4E2A\u53F7\u4E3B\u670B\u53CB\u7684\u561B\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/kaiyuan/yuneban-wangyiyunyinyue-04.png" alt=""></p><p>\u7F51\u7AD9\u7684\u5BA2\u6237\u7AEF\u548C\u7BA1\u7406\u7AEF\u4F7F\u7528 VUE \u6846\u67B6\u6765\u5B9E\u73B0\u7684\uFF0C\u670D\u52A1\u7AEF\u4F7F\u7528 Spring Boot + MyBatis \u6765\u5B9E\u73B0\uFF0C\u6570\u636E\u5E93\u4F7F\u7528\u4E86 MySQL\u3002\u5EFA\u8BAE\u81F3\u5C11 1.5 \u500D\u901F\u98DF\u7528\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/kaiyuan/yuneban-wangyiyunyinyue-05.png" alt=""></p><p>\u524D\u540E\u7AEF\u6574\u4F53\u7684\u9879\u76EE\u7ED3\u6784\u4E5F\u633A\u6E05\u6670\u7684\uFF0C\u8FD9\u662F\u540E\u7AEF\u7684\u3002</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>\u251C\u2500\u2500 avatorImages // \u7528\u6237\u5934\u50CF
 \u251C\u2500\u2500 img
 \u2502   \u251C\u2500\u2500 singerPic // \u6B4C\u624B\u56FE\u7247
 \u2502   \u251C\u2500\u2500 songListPic // \u6B4C\u5355\u56FE\u7247
diff --git a/dist/assets/zhengzhou.html.43c30f38.js b/dist/assets/zhengzhou.html.43c30f38.js
deleted file mode 100644
index 2b7e2a80..00000000
--- a/dist/assets/zhengzhou.html.43c30f38.js
+++ /dev/null
@@ -1 +0,0 @@
-const e={key:"v-b3887a38",path:"/cityselect/zhengzhou.html",title:"\u90D1\u5DDE\u6709\u54EA\u4E9B\u4E0D\u9519\u7684\u4E92\u8054\u7F51\u516C\u53F8\uFF1F",lang:"zh-CN",frontmatter:{category:["\u6C42\u804C\u9762\u8BD5"],tag:["\u57CE\u5E02\u9009\u62E9"],summary:'\u90D1\u5DDE\u6709\u54EA\u4E9B\u4E0D\u9519\u7684\u4E92\u8054\u7F51\u516C\u53F8\uFF1F \u9996\u5148\u6211\u4EEC\u6765\u770B\u5DE5\u4F5C\u673A\u4F1A\uFF01 \u4E00\u4F4D\u8BFB\u8005\u7684\u8BC4\u8BBA\u6211\u89C9\u5F97\u7279\u522B\u7684\u597D\uFF0C\u6211\u8D34\u5230\u8FD9\u91CC\u7ED9\u5927\u5BB6\u770B\u4E0B\uFF1A \u7F51\u540D"\u5494\u5693"\uFF1A\u4F5C\u4E3A\u5728\u90D1\u5DDE\u5DE5\u4F5C\u7684\u524D\u7AEF\uFF0C\u8868\u793A\u9047\u89C1\u597D\u5382\u7684\u8BDD\uFF0C\u751F\u6D3B\u8282\u594F\u8FD8\u662F\u5F88\u723D\u7684\uFF0C\u623F\u79DF\u4E0D\u8D35\uFF0C\u76F4\u63A5\u4F4F\u516C\u53F8\u65C1\u8FB9\uFF0C\u901A\u52E45\u5206\u949F\uFF0C\u4E0D\u52A0\u73ED\u7684\u8BDD\uFF0C\u6BCF\u5929\u665A\u4E0A6\u70B9\u4E0B\u73ED\uFF0C\u53CC\u4F11\u3002\u786E\u5B9E\u90D1\u5DDE\u4E92\u8054\u7F51\u4E0D\u5F3A\uFF0C\u4F46\u662F\uFF0C\u6211\u4EEC\u4E5F\u4E0D\u5E94\u8BE5\u5FD8\u4E86\u751F\u6D3B\u672C\u8BE5\u6709\u7684\u6837\u5B50\u554A\u3002 \u5DE5\u4F5C\u673A\u4F1A \u90D1\u5DDE\u7684\u4E92\u8054\u7F51\u8D44\u6E90\u8FD8\u662F\u6BD4\u8F83\u532E\u4E4F\u7684',head:[["meta",{property:"og:url",content:"https://tobebetterjavaer.com/cityselect/zhengzhou.html"}],["meta",{property:"og:site_name",content:"Java \u7A0B\u5E8F\u5458\u8FDB\u9636\u4E4B\u8DEF"}],["meta",{property:"og:title",content:"\u90D1\u5DDE\u6709\u54EA\u4E9B\u4E0D\u9519\u7684\u4E92\u8054\u7F51\u516C\u53F8\uFF1F"}],["meta",{property:"og:type",content:"article"}],["meta",{property:"og:updated_time",content:"2022-05-13T23:14:28.000Z"}],["meta",{property:"og:locale",content:"zh-CN"}],["meta",{property:"article:tag",content:"\u57CE\u5E02\u9009\u62E9"}],["meta",{property:"article:modified_time",content:"2022-05-13T23:14:28.000Z"}]]},excerpt:"",headers:[{level:2,title:"\u5DE5\u4F5C\u673A\u4F1A",slug:"\u5DE5\u4F5C\u673A\u4F1A",children:[{level:3,title:"\u6570\u5B57\u90D1\u5DDE",slug:"\u6570\u5B57\u90D1\u5DDE",children:[]},{level:3,title:"\u4E2D\u539F\u94F6\u884C",slug:"\u4E2D\u539F\u94F6\u884C",children:[]},{level:3,title:"\u6D6A\u6F6E",slug:"\u6D6A\u6F6E",children:[]},{level:3,title:"\u65B0\u534E\u4E09",slug:"\u65B0\u534E\u4E09",children:[]},{level:3,title:"UU \u8DD1\u817F",slug:"uu-\u8DD1\u817F",children:[]},{level:3,title:"\u4E2D\u539F\u6D88\u8D39\u91D1\u878D",slug:"\u4E2D\u539F\u6D88\u8D39\u91D1\u878D",children:[]},{level:3,title:"\u5200\u950B\u4E92\u5A31",slug:"\u5200\u950B\u4E92\u5A31",children:[]},{level:3,title:"\u65B0\u5F00\u666E",slug:"\u65B0\u5F00\u666E",children:[]},{level:3,title:"\u4E2D\u79FB\u5728\u7EBF",slug:"\u4E2D\u79FB\u5728\u7EBF",children:[]},{level:3,title:"\u7231\u4E91\u6821",slug:"\u7231\u4E91\u6821",children:[]},{level:3,title:"\u5999\u4F18\u8F66",slug:"\u5999\u4F18\u8F66",children:[]},{level:3,title:"\u817E\u6CB3",slug:"\u817E\u6CB3",children:[]},{level:3,title:"\u771F\u4E8C\u7F51",slug:"\u771F\u4E8C\u7F51",children:[]},{level:3,title:"\u7855\u8BFA\u79D1\u6280",slug:"\u7855\u8BFA\u79D1\u6280",children:[]},{level:3,title:"\u79D1\u5927\u8BAF\u98DE",slug:"\u79D1\u5927\u8BAF\u98DE",children:[]},{level:3,title:"\u5B57\u8282\u8DF3\u52A8",slug:"\u5B57\u8282\u8DF3\u52A8",children:[]},{level:3,title:"\u5176\u4ED6",slug:"\u5176\u4ED6",children:[]}]},{level:2,title:"\u751F\u6D3B\u73AF\u5883&\u751F\u6D3B\u6210\u672C",slug:"\u751F\u6D3B\u73AF\u5883-\u751F\u6D3B\u6210\u672C",children:[{level:3,title:"\u623F\u4EF7",slug:"\u623F\u4EF7",children:[]},{level:3,title:"\u6559\u80B2",slug:"\u6559\u80B2",children:[]},{level:3,title:"\u533B\u7597",slug:"\u533B\u7597",children:[]},{level:3,title:"\u672C\u5730\u5C45\u6C11",slug:"\u672C\u5730\u5C45\u6C11",children:[]},{level:3,title:"\u4EA4\u901A",slug:"\u4EA4\u901A",children:[]},{level:3,title:"\u7F8E\u98DF",slug:"\u7F8E\u98DF",children:[]}]}],git:{createdTime:164837021e4,updatedTime:1652483668e3,contributors:[{name:"itwanger",email:"www.qing_gee@163.com",commits:3},{name:"\u6C89\u9ED8\u738B\u4E8C",email:"www.qing_gee@163.com",commits:2}]},readingTime:{minutes:11.42,words:3425},filePathRelative:"cityselect/zhengzhou.md"};export{e as data};
diff --git a/dist/assets/zhengzhou.html.5cf8ec33.js b/dist/assets/zhengzhou.html.5cf8ec33.js
deleted file mode 100644
index 99b7d5ef..00000000
--- a/dist/assets/zhengzhou.html.5cf8ec33.js
+++ /dev/null
@@ -1 +0,0 @@
-import{_ as r}from"./plugin-vue_export-helper.21dcd24c.js";import{r as c,o as p,c as h,a as e,b as d,e as b,d as a}from"./app.a0271b9c.js";const i={},n=b('<h1 id="\u90D1\u5DDE\u6709\u54EA\u4E9B\u4E0D\u9519\u7684\u4E92\u8054\u7F51\u516C\u53F8" tabindex="-1"><a class="header-anchor" href="#\u90D1\u5DDE\u6709\u54EA\u4E9B\u4E0D\u9519\u7684\u4E92\u8054\u7F51\u516C\u53F8" aria-hidden="true">#</a> \u90D1\u5DDE\u6709\u54EA\u4E9B\u4E0D\u9519\u7684\u4E92\u8054\u7F51\u516C\u53F8\uFF1F</h1><p>\u9996\u5148\u6211\u4EEC\u6765\u770B\u5DE5\u4F5C\u673A\u4F1A\uFF01</p><p>\u4E00\u4F4D\u8BFB\u8005\u7684\u8BC4\u8BBA\u6211\u89C9\u5F97\u7279\u522B\u7684\u597D\uFF0C\u6211\u8D34\u5230\u8FD9\u91CC\u7ED9\u5927\u5BB6\u770B\u4E0B\uFF1A</p><p>\u7F51\u540D&quot;\u5494\u5693&quot;\uFF1A\u4F5C\u4E3A\u5728\u90D1\u5DDE\u5DE5\u4F5C\u7684\u524D\u7AEF\uFF0C\u8868\u793A\u9047\u89C1\u597D\u5382\u7684\u8BDD\uFF0C\u751F\u6D3B\u8282\u594F\u8FD8\u662F\u5F88\u723D\u7684\uFF0C\u623F\u79DF\u4E0D\u8D35\uFF0C\u76F4\u63A5\u4F4F\u516C\u53F8\u65C1\u8FB9\uFF0C\u901A\u52E45\u5206\u949F\uFF0C\u4E0D\u52A0\u73ED\u7684\u8BDD\uFF0C\u6BCF\u5929\u665A\u4E0A6\u70B9\u4E0B\u73ED\uFF0C\u53CC\u4F11\u3002\u786E\u5B9E\u90D1\u5DDE\u4E92\u8054\u7F51\u4E0D\u5F3A\uFF0C\u4F46\u662F\uFF0C\u6211\u4EEC\u4E5F\u4E0D\u5E94\u8BE5\u5FD8\u4E86\u751F\u6D3B\u672C\u8BE5\u6709\u7684\u6837\u5B50\u554A\u3002</p><h2 id="\u5DE5\u4F5C\u673A\u4F1A" tabindex="-1"><a class="header-anchor" href="#\u5DE5\u4F5C\u673A\u4F1A" aria-hidden="true">#</a> \u5DE5\u4F5C\u673A\u4F1A</h2><p>\u90D1\u5DDE\u7684\u4E92\u8054\u7F51\u8D44\u6E90\u8FD8\u662F\u6BD4\u8F83\u532E\u4E4F\u7684\uFF0C\u7A76\u5176\u539F\u56E0\uFF0C\u6211\u89C9\u5F97\u548C\u6559\u80B2\u8D44\u6E90\u7684\u532E\u4E4F\u6709\u975E\u5E38\u5927\u7684\u5173\u7CFB\u3002</p><p>\u6559\u80B2\u8D44\u6E90\u6781\u5EA6\u532E\u4E4F\u5BFC\u81F4\u597D\u7684\u4F01\u4E1A\u4E0D\u6765\uFF0C\u597D\u7684\u4F01\u4E1A\u4E0D\u6765\u53C8\u5BFC\u81F4\u4EBA\u624D\u5916\u6D41\uFF0C\u6076\u6027\u5FAA\u73AF\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-0cd5c4ac-4e67-4b06-b5a3-20fad836824b.png" alt=""></p><h3 id="\u6570\u5B57\u90D1\u5DDE" tabindex="-1"><a class="header-anchor" href="#\u6570\u5B57\u90D1\u5DDE" aria-hidden="true">#</a> \u6570\u5B57\u90D1\u5DDE</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-b88e7ee0-5ab7-40af-8d1d-16cd3eae7b97.png" alt="img"></p><p>\u8FD9\u4E2A\u662F\u963F\u91CC\u548C\u90D1\u5DDE\u7684\u653F\u5E9C\u5408\u4F5C\u7684\uFF0C\u76EE\u524D\u8BC4\u4EF7\u5927\u5BB6\u5BF9\u6570\u5B57\u90D1\u5DDE\u7684\u8BC4\u4EF7\u5F88\u4E0D\u9519\u5440\uFF0C\u85AA\u8D44\u4E5F\u633A\u7ED9\u529B\u7684\uFF0C\u5927\u5BB6\u53EF\u4EE5\u770B\u4E0B Boss \u4E0A\u6570\u5B57\u90D1\u5DDE\u7684\u62DB\u8058\u5C97\u4F4D\u4EE5\u53CA\u85AA\u8D44\u62A5\u4EF7\u5440\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-b1ef6dc9-0859-47fd-9058-a504bf01cd5a.png" alt=""></p><h3 id="\u4E2D\u539F\u94F6\u884C" tabindex="-1"><a class="header-anchor" href="#\u4E2D\u539F\u94F6\u884C" aria-hidden="true">#</a> \u4E2D\u539F\u94F6\u884C</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-db7b6919-2158-4846-914f-f30e028c0234.png" alt="img"></p><p>\u4E2D\u539F\u94F6\u884C\u7684\u5DE5\u8D44\u6BD4\u8F83\u9AD8\uFF0C\u5728\u90D1\u5DDE\u751F\u6D3B\u7684\u8BDD\u53BB\u4E2D\u539F\u94F6\u884C\u662F\u5F88\u4E0D\u9519\u7684\u9009\u62E9\uFF0C\u4E0D\u8FC7\u60F3\u8FDB\u4E2D\u539F\u94F6\u884C\u7684\u8BDD\uFF0C\u4E0D\u662F\u6821\u62DB\u60F3\u8FDB\u53BB\u6709\u70B9\u96BE\u3002\u85AA\u8D44\u6C34\u5E73\u53EF\u4EE5\u770B\u4E0B Boss \u4E0A\u7684\u62DB\u8058\u85AA\u8D44\u6C34\u5E73\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-ce9e2a6e-8743-49b3-83aa-8719da78b7e1.png" alt=""></p><h3 id="\u6D6A\u6F6E" tabindex="-1"><a class="header-anchor" href="#\u6D6A\u6F6E" aria-hidden="true">#</a> \u6D6A\u6F6E</h3><p>\u6D6A\u6F6E\u5728\u90D1\u5DDE\u7684\u7814\u53D1\u4E2D\u5FC3\u6CD5\u5B9A\u8282\u5047\u65E5\u52A0\u73ED\u662F\u6709\u52A0\u73ED\u8D39\u7684\uFF0C\u4F46\u5E73\u65F6\u52A0\u73ED\u5C31\u6CA1\u6709\u52A0\u73ED\u8D39\u4E86\uFF0C\u6BCF\u6708\u8981\u6C42\u52A0\u591F50\u4E2A\u5C0F\u65F6\u7684\u73ED\u3002\u85AA\u8D44\u6C34\u5E73\u5927\u5BB6\u4E5F\u53EF\u4EE5\u53C2\u8003\u4E0B Boss \u4E0A\u653E\u51FA\u7684\u62DB\u8058\u85AA\u8D44\u6C34\u5E73\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-ef0fe9a0-eff2-4037-96d2-ab84a2f76491.png" alt=""></p><h3 id="\u65B0\u534E\u4E09" tabindex="-1"><a class="header-anchor" href="#\u65B0\u534E\u4E09" aria-hidden="true">#</a> \u65B0\u534E\u4E09</h3><p>\u65B0\u534E\u4E09\u5927\u90E8\u5206\u60C5\u51B5\u4E0B\u80FD\u53CC\u4F11\uFF0C\u5468\u672B\u52A0\u73ED\u4E5F\u6709\u52A0\u73ED\u8D39\uFF0C\u4E0D\u8FC7\u6DA8\u85AA\u5F88\u7F13\u6162\u3002\u5728\u7F51\u4E0A\u770B\u5230\u4E00\u4E2A\u5E16\u5B50\uFF0C\u6709\u4EBA\u95EE offer \u9009\u897F\u5B89\u4E2D\u5174\u8FD8\u7B97\u90D1\u5DDE\u65B0\u534E\u4E09\uFF0C\u4E2D\u5174\u548C\u534E\u4E09\u7684\u804C\u5DE5\u90FD\u5728\u4E92\u76F8\u529D\u9000\uFF0C\u8BF4\u8FD9\u662F\u4E00\u4E2A\u9001\u547D\u9898\u3002\u85AA\u8D44\u6C34\u5E73\u5927\u5BB6\u8FD8\u662F\u53C2\u8003\u4E0BBoss\u4E0A\u7684\u62DB\u8058\u85AA\u8D44\u6C34\u5E73\u5427\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-caa46657-f65d-4965-b553-c9f4502f3cc9.png" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-62496f27-fe20-45c6-b116-90a38e607a09.jpg" alt="\u70B9\u51FB\u5E76\u62D6\u62FD\u4EE5\u79FB\u52A8"></p><h3 id="uu-\u8DD1\u817F" tabindex="-1"><a class="header-anchor" href="#uu-\u8DD1\u817F" aria-hidden="true">#</a> UU \u8DD1\u817F</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-624dd61d-2b19-4cb6-b4b6-e1b813fd6baf.png" alt=""></p><p>UU \u8DD1\u817F\u4E3B\u8981\u63D0\u4F9B\u540C\u57CE\u9001\u4EF6\u670D\u52A1\uFF0C\u662F\u90D1\u5DDE\u672C\u571F\u6700\u5927\u7684\u4E92\u8054\u7F51\u516C\u53F8\uFF0C\u96B6\u5C5E\u4E8E\u90D1\u5DDE\u65F6\u7A7A\u96A7\u9053\u4FE1\u606F\u6280\u672F\u6709\u9650\u516C\u53F8\uFF0C\u5730\u5740\u4F4D\u4E8E\u90D1\u5DDE\u5E02\u91D1\u6C34\u533A\u3002</p><p>UU \u8DD1\u817F\u7684\u5DE5\u4F5C\u73AF\u5883\u4EE5\u53CA\u5404\u79CD\u798F\u5229\u90FD\u8FD8\u7B97\u4E0D\u9519\uFF01</p><p>\u9762\u8BD5\u7684\u8BDD\uFF0C\u603B\u4F53\u4F53\u9A8C\u8FD8\u4E0D\u9519\uFF0C\u6280\u672F\u9762\u8BD5\u4E00\u822C\u95EE\u7684\u8FD8\u6BD4\u8F83\u5168\u9762\u3002\u62FF Java \u540E\u7AEF\u5F00\u53D1\u6765\u8BF4\uFF0C\u50CF SQL \u4F18\u5316\u3001\u5206\u5E03\u5F0F\u3001\u7F13\u5B58\u8FD9\u4E9B\u4E00\u822C\u90FD\u4F1A\u95EE\u5230\u3002</p><p>\u85AA\u8D44\u7684\u8BDD\uFF0C\u770B\u51C6\u7F51\u4E0A\u7684\u5E73\u5747\u85AA\u8D44\u662F 10k \u9644\u8FD1\uFF0C\u5176\u4E2D\u540E\u7AEF\u5F00\u53D1\u7684\u85AA\u8D44\u5728 14k \u9644\u8FD1\uFF0C\u524D\u7AEF\u5F00\u53D1\u7684\u85AA\u8D44\u5728 10k \u9644\u8FD1\uFF0C\u8F6F\u4EF6\u6D4B\u8BD5\u7684\u85AA\u8D44\u5728 10k \u9644\u8FD1(\u85AA\u8D44\u6C34\u5E73\u4EC5\u4F9B\u53C2\u8003\uFF0C\u5B9E\u9645\u60C5\u51B5\u56E0\u4EBA\u548C\u5C97\u4F4D\u6216\u8BB8\u4F1A\u6709\u4E00\u4E9B\u51FA\u5165)\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-b3a5d176-a10b-4637-a349-06197ee984a8.png" alt=""></p><h3 id="\u4E2D\u539F\u6D88\u8D39\u91D1\u878D" tabindex="-1"><a class="header-anchor" href="#\u4E2D\u539F\u6D88\u8D39\u91D1\u878D" aria-hidden="true">#</a> \u4E2D\u539F\u6D88\u8D39\u91D1\u878D</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-3317ba70-8310-465c-b36d-60f8e215960c.png" alt=""></p><p>\u6CB3\u5357\u4E2D\u539F\u6D88\u8D39\u91D1\u878D\u80A1\u4EFD\u6709\u9650\u516C\u53F8\u662F\u4E00\u5BB6\u5168\u56FD\u6027\u975E\u94F6\u884C\u91D1\u878D\u673A\u6784\uFF0C\u5730\u5740\u4F4D\u4E8E\u90D1\u5DDE\u5E02\u90D1\u4E1C\u65B0\u533A\u3002</p><p>\u4E2D\u539F\u6D88\u8D39\u91D1\u878D\u7684\u529E\u516C\u73AF\u5883\u975E\u5E38\u4E0D\u9519\uFF0C\u85AA\u8D44\u798F\u5229\u76F8\u5BF9\u4E5F\u8FD8\u4E0D\u9519\u3002</p><p>\u6574\u4F53\u9762\u8BD5\u4F53\u9A8C\u4E0D\u9519\uFF0C\u6548\u7387\u4E5F\u975E\u5E38\u9AD8\uFF0C\u50CF\u6280\u672F\u9762\u8BD5\u7684\u8BDD\u4E00\u822C\u662F\u4E09\u8F6E\u6216\u8005\u56DB\u8F6E\u3002\u4E0D\u8FC7\uFF0C\u4E2D\u539F\u6D88\u8D39\u91D1\u878D\u6BD4\u8F83\u770B\u91CD\u5B66\u5386\uFF0C985/211 \u4E0A\u5CB8\u7684\u51E0\u7387\u6BD4\u8F83\u5927\u3002</p><p>\u85AA\u8D44\u7684\u8BDD\uFF0C\u770B\u51C6\u7F51\u4E0A\u7684\u5E73\u5747\u85AA\u8D44\u662F 16k \u9644\u8FD1\uFF0C\u5176\u4E2D\u540E\u7AEF\u5F00\u53D1\u7684\u85AA\u8D44\u5728 17k \u9644\u8FD1\uFF0C\u524D\u7AEF\u5F00\u53D1\u7684\u85AA\u8D44\u5728 16k \u9644\u8FD1\uFF0C\u8F6F\u4EF6\u6D4B\u8BD5\u7684\u85AA\u8D44\u5728 14k \u9644\u8FD1(\u85AA\u8D44\u6C34\u5E73\u4EC5\u4F9B\u53C2\u8003\uFF0C\u5B9E\u9645\u60C5\u51B5\u56E0\u4EBA\u548C\u5C97\u4F4D\u6216\u8BB8\u4F1A\u6709\u4E00\u4E9B\u51FA\u5165\uFF0C\u5E94\u8BE5\u5230\u4E0D\u4E86\u8FD9\u4E48\u9AD8)\u3002</p><p>\u6CE8\u610F\uFF1A\u5927\u5BB6\u6CE8\u610F\u4E00\u4E2A\u60C5\u51B5\uFF0C\u4E2D\u539F\u6D88\u8D39\u7684\u8F6F\u4EF6\u7814\u53D1\u5C97\u4F4D\u5927\u90E8\u5206\u90FD\u642C\u8FC1\u5230\u4E0A\u6D77\u4E86\uFF0C\u76EE\u524D\u5728\u90D1\u5DDE\u7684\u5927\u90E8\u5206\u662F\u884C\u653F\u5C97\u4F4D\uFF0C\u53EA\u6709\u5C11\u90E8\u5206\u7814\u53D1\u5C97\u4F4D\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-6de95df2-4c10-44af-9ddb-935cb358def6.png" alt=""></p><h3 id="\u5200\u950B\u4E92\u5A31" tabindex="-1"><a class="header-anchor" href="#\u5200\u950B\u4E92\u5A31" aria-hidden="true">#</a> \u5200\u950B\u4E92\u5A31</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-aa02294b-e809-49b6-9e96-4ec44db676c3.png" alt=""></p><p>\u5200\u950B\u4E92\u5A31\u662F\u4E00\u5BB6\u4E13\u6CE8\u6E38\u620F\u670D\u52A1\u5E02\u573A\u7684\u4E92\u8054\u7F51\u516C\u53F8\uFF0C2019 \u5E74\u5B8C\u6210 A+\u8F6E\u878D\u8D44\uFF0C\u5E73\u53F0\u6CE8\u518C\u7528\u6237\u91CF\u7A81\u7834\u5343\u4E07\u3002</p><p>\u65D7\u4E0B\u6BD4\u8F83\u51FA\u540D\u7684\u4EA7\u54C1\u6709\u79DF\u53F7\u73A9\u3001\u4E00\u6D3E\u966A\u73A9\uFF0C\u90FD\u662F\u548C\u6E38\u620F\u9886\u57DF\u76F8\u5173\u7684\u4EA7\u54C1\u3002\u76F8\u4FE1\u6BD4\u8F83\u559C\u6B22\u73A9\u6E38\u620F\u7684\u5C0F\u4F19\u4F34\u5E94\u8BE5\u5BF9\u8FD9\u4E2A\u4E24\u4E2A\u4EA7\u54C1\u6709\u4E86\u89E3\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-ec100440-a50e-4f27-88e4-4b075cf12676.png" alt=""></p><p>\u6574\u4F53\u9762\u8BD5\u4E0D\u662F\u5F88\u96BE\uFF0C\u85AA\u8D44\u76F8\u5BF9\u6765\u8BF4\u4E5F\u8FD8\u53EF\u4EE5\u3002</p><p>\u85AA\u8D44\u7684\u8BDD\uFF0C\u770B\u51C6\u7F51\u4E0A\u7684\u5E73\u5747\u85AA\u8D44\u662F 16k \u9644\u8FD1\uFF0C\u5176\u4E2D\u540E\u7AEF\u5F00\u53D1\uFF08C++\uFF09\u7684\u85AA\u8D44\u5728 20k \u9644\u8FD1\uFF0C\u524D\u7AEF\u5F00\u53D1\u7684\u85AA\u8D44\u5728 8.5k \u9644\u8FD1\uFF0C\u8F6F\u4EF6\u6D4B\u8BD5\u7684\u85AA\u8D44\u5728 9.5k \u9644\u8FD1(\u85AA\u8D44\u6C34\u5E73\u4EC5\u4F9B\u53C2\u8003\uFF0C\u5B9E\u9645\u60C5\u51B5\u56E0\u4EBA\u548C\u5C97\u4F4D\u6216\u8BB8\u4F1A\u6709\u4E00\u4E9B\u51FA\u5165)\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-1b7640e6-deee-42f6-8df7-639555c5d236.png" alt=""></p><h3 id="\u65B0\u5F00\u666E" tabindex="-1"><a class="header-anchor" href="#\u65B0\u5F00\u666E" aria-hidden="true">#</a> \u65B0\u5F00\u666E</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-ca1cf626-13aa-4081-b6c0-285893458dde.png" alt=""></p><p>\u65B0\u5F00\u666E\u4E5F\u662F\u90D1\u5DDE\u7684\u4E00\u5BB6\u672C\u571F\u4E92\u8054\u7F51\u516C\u53F8\uFF0C\u6210\u7ACB\u4E8E\u90D1\u5DDE\u9AD8\u65B0\u6280\u672F\u4EA7\u4E1A\u5F00\u53D1\u533A\uFF0C\u4E3B\u8981\u505A NFC \u8FD1\u573A\u79FB\u52A8\u652F\u4ED8\u3001\u91D1\u878D IC \u5361\u7B49\u4E1A\u52A1\u3002</p><p>\u65B0\u5F00\u666E\u662F\u76EE\u524D\u56FD\u5185\u4E00\u5361\u901A\u884C\u4E1A\u552F\u4E00\u4E00\u5BB6\u4E0A\u5E02\u516C\u53F8\uFF0C\u5DF2\u7ECF\u4E3A\u5168\u56FD\u5343\u6240\u9AD8\u6821\uFF0C\u5343\u4E07\u540D\u5927\u5B66\u751F\u63D0\u4F9B\u670D\u52A1\u3002</p><p>\u6280\u672F\u9762\u8BD5\u7684\u8BDD\uFF0C\u4E00\u822C\u7B2C\u4E00\u9762\u662F\u7B14\u8BD5\uFF0C\u7B14\u8BD5\u4E4B\u540E\u4F1A\u518D\u95EE\u4F60\u4E00\u4E9B\u76F8\u5173\u7684\u6280\u672F\u95EE\u9898\u3002</p><p>\u85AA\u8D44\u7684\u8BDD\uFF0C\u770B\u51C6\u7F51\u4E0A\u7684\u5E73\u5747\u85AA\u8D44\u662F 7.6k \u9644\u8FD1\uFF0C\u5176\u4E2D\u540E\u7AEF\u5F00\u53D1\uFF08Java\uFF09\u7684\u85AA\u8D44\u5728 9k \u9644\u8FD1\uFF0C\u524D\u7AEF\u5F00\u53D1\u7684\u85AA\u8D44\u5728 9k \u9644\u8FD1\uFF0C\u8F6F\u4EF6\u6D4B\u8BD5\u7684\u85AA\u8D44\u5728 5.5k \u9644\u8FD1(\u85AA\u8D44\u6C34\u5E73\u4EC5\u4F9B\u53C2\u8003\uFF0C\u5B9E\u9645\u60C5\u51B5\u56E0\u4EBA\u548C\u5C97\u4F4D\u6216\u8BB8\u4F1A\u6709\u4E00\u4E9B\u51FA\u5165)\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-dca4c23e-7310-4a60-b338-25f3e92d3339.png" alt=""></p><h3 id="\u4E2D\u79FB\u5728\u7EBF" tabindex="-1"><a class="header-anchor" href="#\u4E2D\u79FB\u5728\u7EBF" aria-hidden="true">#</a> \u4E2D\u79FB\u5728\u7EBF</h3><p>\u4E2D\u56FD\u79FB\u52A8\u65D7\u4E0B\u7684\u4E00\u5BB6\u201C\u4E92\u8054\u7F51\u201D\u516C\u53F8\uFF0C\u5B9E\u9645\u4E0D\u50CF\u662F\u201C\u4E92\u8054\u7F51\u201D\u516C\u53F8\u3002</p><p>\u5BF9\u4E8E\u6280\u672F\u5F00\u53D1\u6765\u8BF4\uFF0C\u53BB\u4E2D\u79FB\u5728\u7EBF\u4E00\u662F\u5BF9\u6280\u672F\u6CA1\u6709\u63D0\u5347\u6216\u8005\u6311\u6218\uFF0C\u4E8C\u662F\u5DE5\u8D44\u662F\u771F\u7684\u4F4E\uFF08\u770B\u51C6\u7F51\u4E0A\u7684 Java \u5F00\u53D1\u85AA\u8D44\u5728 8k \u9644\u8FD1\uFF09\u3002</p><p>\u771F\u5FC3\u4E0D\u592A\u5EFA\u8BAE\u53BB\uFF0C\u9664\u975E\u4F60\u6CA1\u6709\u5176\u4ED6\u66F4\u597D\u7684\u9009\u62E9\u3002</p><p>\u6211\u80FD\u60F3\u5230\u552F\u4E00\u7684\u4F18\u52BF\u53EF\u80FD\u662F\u516C\u53F8\u76F8\u5BF9\u6765\u8BF4\u80FD\u63D0\u4F9B\u7ED9\u4F60\u7684\u4E00\u4E2A\u76F8\u5BF9\u7A33\u5B9A\u7684\u5DE5\u4F5C\u3002</p><h3 id="\u7231\u4E91\u6821" tabindex="-1"><a class="header-anchor" href="#\u7231\u4E91\u6821" aria-hidden="true">#</a> \u7231\u4E91\u6821</h3><p>\u7231\u4E91\u6821\u5E38\u89C1\u4E8E 2014 \u5E74\uFF0C\u4E3B\u8981\u505A\u7684\u662F\u5728\u6821\u6559\u80B2\u8FD9\u5757\uFF0C\u81F4\u529B\u4E8E\u901A\u8FC7 AI \u5EFA\u4E00\u6240\u4E91\u4E0A\u7684\u5B66\u6821\u3002</p><p>\u5355\u770B\u516C\u53F8\u6240\u505A\u7684\u4E1A\u52A1\u65B9\u5411\u6765\u8BF4\uFF0C\u53D1\u5C55\u76F8\u5BF9\u6765\u8BF4\u8FD8\u662F\u4E0D\u9519\u7684\u3002\u4E0D\u8FC7\uFF0C\u636E\u8BF4\u516C\u53F8\u7684\u7BA1\u7406\u771F\u7684\u662F\u6E23\u5230\u4E86\u4E00\u5B9A\u7A0B\u5EA6\u3002</p><p>\u53E6\u5916\uFF0C\u6839\u636E\u5927\u90E8\u5206\u9762\u8BD5\u6C42\u804C\u8005\u7684\u53CD\u9988\u6765\u770B\uFF0C\u8FD9\u5BB6\u516C\u53F8\u7684\u6574\u4F53\u9762\u8BD5\u4F53\u9A8C\u6BD4\u8F83\u5DEE\u3002</p><p>\u85AA\u8D44\u7684\u8BDD\uFF0C\u770B\u51C6\u7F51\u4E0A\u7684\u5E73\u5747\u85AA\u8D44\u662F 12k \u9644\u8FD1\uFF0C\u5176\u4E2D\u540E\u7AEF\u5F00\u53D1\uFF08Java\uFF09\u7684\u85AA\u8D44\u5728 14k \u9644\u8FD1\uFF0C\u524D\u7AEF\u5F00\u53D1\u7684\u85AA\u8D44\u5728 8k \u9644\u8FD1\uFF0C\u8F6F\u4EF6\u6D4B\u8BD5\u7684\u85AA\u8D44\u5728 10k \u9644\u8FD1(\u85AA\u8D44\u6C34\u5E73\u4EC5\u4F9B\u53C2\u8003\uFF0C\u5B9E\u9645\u60C5\u51B5\u56E0\u4EBA\u548C\u5C97\u4F4D\u6216\u8BB8\u4F1A\u6709\u4E00\u4E9B\u51FA\u5165)\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-90273777-d5d0-424a-a8b0-e5df53455ef9.png" alt=""></p><h3 id="\u5999\u4F18\u8F66" tabindex="-1"><a class="header-anchor" href="#\u5999\u4F18\u8F66" aria-hidden="true">#</a> \u5999\u4F18\u8F66</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-b6ca12ab-ecb5-4b01-9cf3-21b22da0d67a.png" alt=""></p><p>\u5999\u4F18\u8F66\u4E3B\u8981\u505A\u7684\u662F\u6C7D\u8F66\u65B9\u9762\u7684\u4E1A\u52A1\uFF0C\u6DB5\u76D6\u6574\u8F66\u9500\u552E\u3001\u6C7D\u8F66\u91D1\u878D\u3001\u6C7D\u8F66\u4FDD\u9669\u3001\u6C7D\u8F66\u7528\u54C1\u3001\u6C7D\u8F66\u7F8E\u5BB9\u7B49\u65B9\u9762\u3002</p><p>\u516C\u53F8\u53D1\u5C55\u4E00\u822C\uFF0C\u7F51\u4E0A\u4E5F\u6709\u4E00\u4E9B\u9ED1\u5386\u53F2(\u53EF\u4EE5\u81EA\u5DF1\u67E5\u4E00\u4E0B)\u3002</p><p>\u4E0D\u8FC7\uFF0C\u6839\u636E\u5927\u90E8\u5206\u9762\u8BD5\u6C42\u804C\u8005\u7684\u53CD\u9988\u6765\u770B\uFF0C\u8FD9\u5BB6\u516C\u53F8\u7684\u6574\u4F53\u9762\u8BD5\u4F53\u9A8C\u8FD8\u662F\u53EF\u4EE5\u7684\u3002</p><p>\u85AA\u8D44\u8FD9\u5757\u7684\u4E00\u822C\u504F\u4E0A\uFF0C\u770B\u51C6\u7F51\u4E0A\u7684\u5E73\u5747\u85AA\u8D44\u662F 11k \u9644\u8FD1\uFF0C\u5176\u4E2D\u540E\u7AEF\u5F00\u53D1\uFF08Java\uFF09\u7684\u85AA\u8D44\u5728 12k \u9644\u8FD1\uFF0C\u524D\u7AEF\u5F00\u53D1\u7684\u85AA\u8D44\u5728 10k \u9644\u8FD1(\u85AA\u8D44\u6C34\u5E73\u4EC5\u4F9B\u53C2\u8003\uFF0C\u5B9E\u9645\u60C5\u51B5\u56E0\u4EBA\u548C\u5C97\u4F4D\u6216\u8BB8\u4F1A\u6709\u4E00\u4E9B\u51FA\u5165)\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-491c2bc1-5cea-48e6-ad47-80eb92ddaa3d.png" alt=""></p><h3 id="\u817E\u6CB3" tabindex="-1"><a class="header-anchor" href="#\u817E\u6CB3" aria-hidden="true">#</a> \u817E\u6CB3</h3><p>\u817E\u8BAF\u662F\u6CB3\u5357\u817E\u6CB3\u7F51\u7EDC\u79D1\u6280\u6709\u9650\u516C\u53F8\u7684\u6700\u5927\u80A1\u4E1C\uFF0C\u7B2C\u4E8C\u5927\u80A1\u4E1C\u662F\u6CB3\u5357\u65E5\u62A5\u3002</p><p>\u4E3B\u8981\u505A\u7684\u4E1A\u52A1\u65B9\u5411\u662F\u6CB3\u5357\u57CE\u5E02\u751F\u6D3B\u7B2C\u4E00\u7F51\u3002</p><p>\u5DE5\u8D44\u6BD4\u8F83\u4F4E\uFF0C\u53E6\u5916\uFF0C\u540E\u7AEF\u8FD9\u5757\u597D\u50CF\u53EA\u62DB PHP\u3002</p><h3 id="\u771F\u4E8C\u7F51" tabindex="-1"><a class="header-anchor" href="#\u771F\u4E8C\u7F51" aria-hidden="true">#</a> \u771F\u4E8C\u7F51</h3><p>\u4E0D\u5F97\u4E0D\u8BF4\uFF0C\u8FD9\u4E2A\u540D\u5B57\u6709\u70B9\u4E1C\u897F\uFF01</p><p>\u771F\u4E8C\u7F51\u521B\u7ACB\u4E8E 2014 \u5E74\uFF0C\u4E5F\u662F\u90D1\u5DDE\u672C\u571F\u7684\u4E00\u5BB6\u4E92\u8054\u7F51\u516C\u53F8\uFF0C\u4E3B\u8981\u505A C2C \u6A21\u5F0F\u7684 0 \u4E2D\u4ECB\u8D39\u771F\u5B9E\u4E8C\u624B\u623F\u4EA4\u6613\u5E73\u53F0\u3002</p><p>\u5DE5\u8D44\u6BD4\u8F83\u4F4E\uFF0C\u53E6\u5916\uFF0C\u540E\u7AEF\u8FD9\u5757\u597D\u50CF\u53EA\u62DB PHP\u3002</p><h3 id="\u7855\u8BFA\u79D1\u6280" tabindex="-1"><a class="header-anchor" href="#\u7855\u8BFA\u79D1\u6280" aria-hidden="true">#</a> \u7855\u8BFA\u79D1\u6280</h3><p>\u7855\u8BFA\u79D1\u6280\u521B\u7ACB\u4E8E 2014 \u5E74\uFF0C\u603B\u90E8\u4F4D\u4E8E\u4E0A\u6D77\uFF0C\u4E3B\u8981\u505A\u7269\u6D41\u8F6F\u4EF6\u7CFB\u7EDF\u9AD8\u7AEF\u5B9A\u5236\u7684\u8F6F\u4EF6\u5F00\u53D1\u3002</p><p>\u7F51\u4E0A\u53EF\u4EE5\u67E5\u5230\u7684\u6D88\u606F\u6BD4\u8F83\u5C11\uFF0C\u611F\u5174\u8DA3\u7684\u5C0F\u4F19\u4F34\u53EF\u4EE5\u81EA\u5DF1\u53BB\u67E5\u4E00\u4E0B\u76F8\u5173\u4FE1\u606F\u554A\uFF01</p><p>\u53E6\u5916\uFF0C\u5982\u679C\u6709\u5C0F\u4F19\u4F34\u5BF9\u8FD9\u5BB6\u516C\u53F8\u6BD4\u8F83\u4E86\u89E3\uFF0C\u4E5F\u53EF\u4EE5\u5728\u8BC4\u8BBA\u533A\u8BF4\u4E00\u4E0B\u554A\uFF01</p><h3 id="\u79D1\u5927\u8BAF\u98DE" tabindex="-1"><a class="header-anchor" href="#\u79D1\u5927\u8BAF\u98DE" aria-hidden="true">#</a> \u79D1\u5927\u8BAF\u98DE</h3><p>\u79D1\u5927\u8BAF\u98DE\u5728\u90D1\u5DDE\u91D1\u6C34\u533A\u6709\u4E00\u4E2A\u5C0F\u5206\u90E8\uFF0C\u5927\u90E8\u5206\u62DB\u8058\u7684\u90FD\u662F\u548C\u6280\u672F\u65E0\u5173\u7684\u5C97\u4F4D\uFF0C\u4E0D\u8FC7\u4E5F\u6709\u4E00\u4E2A Java \u5F00\u53D1\u5C97\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-dc1517e7-c93b-457f-96d2-0871c17bf916.png" alt=""></p><h3 id="\u5B57\u8282\u8DF3\u52A8" tabindex="-1"><a class="header-anchor" href="#\u5B57\u8282\u8DF3\u52A8" aria-hidden="true">#</a> \u5B57\u8282\u8DF3\u52A8</h3><p>\u90D1\u5DDE\u4E5F\u6709\u5B57\u8282\u8DF3\u52A8\u5206\u90E8\uFF0C\u4E0D\u8FC7\u90FD\u662F\u548C\u5E02\u573A\u62D3\u5C55\u4E0E\u8FD0\u8425\u76F8\u5173\u7684\u5C97\u4F4D\uFF0C\u50CF\u6280\u672F\u5F00\u53D1\u5C97\u662F\u6CA1\u6709\u7684\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-c7d11e68-2b85-4895-a3c5-44f6816ccfb2.png" alt=""></p><p>\u7C7B\u4F3C\u7684\u8FD8\u6709\u7F8E\u56E2\u3001\u534E\u4E3A\u3001\u963F\u91CC\u5DF4\u5DF4\u7B49\u5927\u5382\uFF0C\u8FD9\u4E9B\u516C\u53F8\u5728\u90D1\u5DDE\u62DB\u8058\u7684\u57FA\u672C\u4E5F\u90FD\u662F\u975E\u6280\u672F\u5C97\u4F4D\u3002</p><h3 id="\u5176\u4ED6" tabindex="-1"><a class="header-anchor" href="#\u5176\u4ED6" aria-hidden="true">#</a> \u5176\u4ED6</h3><p>\u5176\u4ED6\u8FD8\u6709\u50CF\u90D1\u5DDE\u70B9\u8BFB\u7535\u5B50\u79D1\u6280\u6709\u9650\u516C\u53F8\uFF08\u65D7\u4E0B\u4EA7\u54C1\u6709\u54BF\u5566\u770B\u4E66\uFF09\u3001\u7FB2\u548C\u7F51\u7EDC\uFF08\u6CB3\u5357\u552F\u4E00\u4E00\u5BB6\u6E38\u620F\u4E0A\u5E02\u4F01\u4E1A\uFF09\u3001\u7C73\u5B85\uFF08\u4E2D\u56FD\u77E5\u540D\u7684\u697C\u5E02\u81EA\u5A92\u4F53\uFF0C\u65B0\u4E09\u677F\u4E0A\u5E02\u4F01\u4E1A\uFF09\u7B49\u4E92\u8054\u7F51\u516C\u53F8\uFF0C\u611F\u5174\u8DA3\u7684\u5C0F\u4F19\u4F34\u53EF\u4EE5\u81EA\u884C\u67E5\u9605\u76F8\u5173\u4FE1\u606F\u5440\uFF01</p><p>\u8BFB\u8005\u8865\u5145\uFF1A\u6D77\u5EB7\u5A01\u89C6\u3001APUS\u3001\u4E91\u9E1F\u3001\u4E9A\u4FE1\u79D1\u6280\u3001\u7267\u539F\u98DF\u54C1\u3001\u5C0F\u9C7C\u6613\u8054\u3001\u795E\u5DDE\u4FE1\u606F\u3001\u4E91\u667A\u6167\u90FD\u5728\u90D1\u5DDE\u62DB\u5F00\u53D1\u5DE5\u7A0B\u5E08\u3002</p><h2 id="\u751F\u6D3B\u73AF\u5883-\u751F\u6D3B\u6210\u672C" tabindex="-1"><a class="header-anchor" href="#\u751F\u6D3B\u73AF\u5883-\u751F\u6D3B\u6210\u672C" aria-hidden="true">#</a> \u751F\u6D3B\u73AF\u5883&amp;\u751F\u6D3B\u6210\u672C</h2><p>\u6211\u4EEC\u518D\u6765\u770B\u770B\u751F\u6D3B\u73AF\u5883\u548C\u751F\u6D3B\u6210\u672C\u3002</p><h3 id="\u623F\u4EF7" tabindex="-1"><a class="header-anchor" href="#\u623F\u4EF7" aria-hidden="true">#</a> \u623F\u4EF7</h3><p>\u90D1\u5DDE\u7684\u623F\u4EF7\u5BF9\u4E8E\u5176\u53D1\u5C55\u6765\u8BF4\u8FD8\u662F\u6BD4\u8F83\u8D35\u7684\u3002\u5F53\u7136\u4E86\uFF0C\u76F8\u6BD4\u4E8E\u4E00\u7EBF\u57CE\u5E02\u80AF\u5B9A\u8FD8\u662F\u8981\u4FBF\u5B9C\u5F88\u591A\u7684\uFF01</p><p>\u4EE5\u4E0B\u623F\u4EF7\u6570\u636E\u6765\u6E90\u4E8E\u5B89\u5C45\u5BA2\uFF0C\u53EF\u4EE5\u4F5C\u4E3A\u53C2\u8003\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-95ec5784-5064-488c-bce8-4c076115a021.png" alt=""></p><h3 id="\u6559\u80B2" tabindex="-1"><a class="header-anchor" href="#\u6559\u80B2" aria-hidden="true">#</a> \u6559\u80B2</h3><p>\u90D1\u5DDE\u7684\u6559\u80B2\u8D44\u6E90\u6781\u5EA6\u532E\u4E4F\uFF01\u636E\u7EDF\u8BA1\u90D1\u5DDE\u4E00\u5171\u6709 65 \u6240\u9AD8\u6821\uFF0C\u5176\u4E2D\uFF0C\u672C\u79D1 26 \u6240\uFF0C\u4E13\u79D1 39 \u6240\u3002</p><p>\u4E0D\u8FC7\uFF0C211 \u9662\u6821\u4EC5\u6709\u4E00\u6240\u2014\u2014\u90D1\u5DDE\u5927\u5B66\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-03294872-3914-441b-ae6b-55200bce097a.png" alt=""></p><p>\u662F\u7684\uFF01\u4F5C\u4E3A\u504C\u5927\u7684\u6CB3\u5357\u7701\u7684\u7701\u4F1A\uFF0C\u56FD\u5BB6\u5386\u53F2\u6587\u5316\u540D\u57CE\uFF0C\u4E5F\u5C31\u53EA\u6709\u4E00\u6240 211\uFF01</p><p>\u6211\u4EEC\u6765\u5BF9\u6BD4\u4E00\u4E0B\u6E56\u5317\u7701\u7701\u4F1A\u6B66\u6C49\uFF0C\u6B66\u6C49 7 \u6240 985/211 \u9AD8\u6821\uFF0C\u5206\u522B\u662F\u6B66\u6C49\u5927\u5B66\u3001\u534E\u4E2D\u79D1\u6280\u5927\u5B66\u3001\u4E2D\u56FD\u5730\u8D28\u5927\u5B66\u3001\u6B66\u6C49\u7406\u5DE5\u5927\u5B66\u3001\u534E\u4E2D\u5E08\u8303\u5927\u5B66\u3001\u534E\u4E2D\u519C\u4E1A\u5927\u5B66\u3001\u4E2D\u5357\u8D22\u7ECF\u653F\u6CD5\u5927\u5B66\u3002</p><p>\u518D\u6765\u5BF9\u6BD4\u4E00\u4E0B\u6E56\u5357\u7701\u7701\u4F1A\u957F\u6C99\uFF0C\u957F\u6C99\u6709 4 \u6240 985/211 \u9AD8\u6821\uFF0C\u5206\u522B\u662F\u56FD\u9632\u79D1\u5927\u3001\u4E2D\u5357\u5927\u5B66\u3001\u6E56\u5357\u5927\u5B66\u3001\u6E56\u5357\u5E08\u8303\u5927\u5B66\u3002</p><h3 id="\u533B\u7597" tabindex="-1"><a class="header-anchor" href="#\u533B\u7597" aria-hidden="true">#</a> \u533B\u7597</h3><p>\u90D1\u5DDE\u7684\u6BCF\u4E07\u4EBA\u5E8A\u4F4D\u6570\u6392\u540D\u6BD4\u8F83\u9760\u524D\u3002</p><p>\u53E6\u5916\uFF0C\u90D1\u5DDE\u5E02\u7684\u4F18\u8D28\u533B\u7597\u8D44\u6E90\uFF0C\u5728\u91D1\u6C34\u533A\u3001\u4E2D\u539F\u533A\u3001\u7BA1\u57CE\u533A\u6BD4\u8F83\u96C6\u4E2D\uFF1B</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-6bbd8d11-dbe5-43c4-9354-b422b7fe1f77.png" alt=""></p><h3 id="\u672C\u5730\u5C45\u6C11" tabindex="-1"><a class="header-anchor" href="#\u672C\u5730\u5C45\u6C11" aria-hidden="true">#</a> \u672C\u5730\u5C45\u6C11</h3><p>\u7F51\u4E0A\u6709\u5F88\u591A\u201C\u6CB3\u5357\u9ED1\u201D\uFF0C\u8BA9\u5F88\u591A\u4EBA\u5BF9\u6CB3\u5357\u7684\u5F71\u54CD\u4E0D\u597D\uFF01</p><p>\u5B9E\u9645\u60C5\u51B5\u53EF\u80FD\u5E76\u4E0D\u662F\u8FD9\u6837\u7684\uFF01\u90D1\u5DDE\u672C\u5730\u5C45\u6C11\u4E0D\u6392\u5916\uFF0C\u7EDD\u5927\u90E8\u5206\u90FD\u7279\u522B\u8001\u5B9E\uFF0C\u672C\u672C\u5206\u5206\u3002</p><p>\u6211\u53BB\u8FC7\u5F88\u591A\u57CE\u5E02\uFF0C\u90D1\u5DDE\u4EBA\u7684\u53CB\u5584\u7A0B\u5EA6\u6211\u89C9\u5F97\u662F\u53EF\u4EE5\u6392\u5728 Top \u7EA7\u522B\u7684\uFF01</p><p>\u53E6\u5916\uFF0C\u90D1\u5DDE\u8FD9\u8FB9\u7684\u5C45\u6C11\u8FD8\u662F\u6BD4\u8F83\u604B\u5BB6\u7684\u3002\u6709\u5F88\u591A\u5728\u5317\u4E0A\u5E7F\u6DF7\u7684\u8FD8\u4E0D\u9519\u7684\u4EBA\uFF0C\u6700\u540E\u4E5F\u8FD8\u662F\u9009\u62E9\u56DE\u6765\uFF01</p><h3 id="\u4EA4\u901A" tabindex="-1"><a class="header-anchor" href="#\u4EA4\u901A" aria-hidden="true">#</a> \u4EA4\u901A</h3><p>\u4F5C\u4E3A\u4E00\u4E2A\u5317\u65B9\u5185\u9646\u57CE\u5E02\uFF0C\u90D1\u5DDE\u53EF\u4EE5\u8BF4\u662F\u4E00\u4E2A\u201C\u4EA4\u901A\u67A2\u7EBD\u201D\u3002\u4ECE\u90D1\u5DDE\u51FA\u53D1\u5750\u9AD8\u94C1\uFF0C\u4F60\u53BB\u56FD\u5185\u5927\u90E8\u5206\u5730\u65B9\u90FD\u975E\u5E38\u65B9\u4FBF\u3002</p><p>\u4E0B\u56FE\u4E2D\u7684\u90E8\u5206\u9AD8\u94C1\u7EBF\u8DEF\u6B63\u5728\u4FEE\u5EFA\uFF0C\u6BD4\u5982\u90D1\u4E07\u9AD8\u94C1\u5168\u7EBF\u5927\u6982\u662F 2021 \u5E74\u4E2D\u65EC\u901A\u8F66\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-0a4d6b3c-a756-4509-a6fd-f3a65f018c84.png" alt=""></p><p>\u90D1\u5DDE\u7684\u5730\u94C1\u89C4\u5212\u60C5\u51B5\u5982\u4E0B\u56FE\u6240\u793A\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-264ab1f2-f355-466a-ab5d-2dc21668e888.gif" alt=""></p><p>\u76EE\u524D\u7684\u8BDD\uFF0C\u90D1\u5DDE\u5730\u94C1\u6709 1 \u53F7\u7EBF\u30012 \u53F7\u7EBF\u30013 \u53F7\u7EBF\u30014 \u53F7\u7EBF\u3001\u57CE\u90CA\u7EBF\u30015 \u53F7\u7EBF\u300114 \u53F7\u7EBF\u4E00\u671F 7 \u6761\u5730\u94C1\u7EBF\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-c5e61f03-efcb-4e56-b9bf-ff7bcec3dce0" alt=""></p><h3 id="\u7F8E\u98DF" tabindex="-1"><a class="header-anchor" href="#\u7F8E\u98DF" aria-hidden="true">#</a> \u7F8E\u98DF</h3><p>\u90D1\u5DDE\u7684\u5404\u79CD\u5546\u4E1A\u8BBE\u65BD\u8FD8\u662F\u6BD4\u8F83\u9F50\u5168\u7684\uFF0C\u6709\u5F88\u591A\u5927\u578B\u7684\u5546\u573A\uFF0C\u5546\u573A\u91CC\u9762\u57FA\u672C\u662F\u6837\u6837\u4FF1\u5168\u3002</p><p>\u90D1\u5DDE\u597D\u5403\u7684\u8FD8\u633A\u591A\u7684\uFF01\u53BB\u4E86\u90D1\u5DDE\u4E4B\u540E\uFF0C\u4E00\u5B9A\u8981\u53BB\u559D\u80E1\u8FA3\u6C64\uFF0C\u771F\u7684\u4E0D\u8981\u592A\u597D\u559D\uFF01</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-757eed5b-4b81-4bb0-a0e1-b24e510cc707.png" alt=""></p><p>\u672C\u5730\u7684\u7F8E\u98DF\u8FD8\u6709\u70E9\u9762\u3001\u7116\u997C\u3001\u70E7\u9E21\u7B49\u7B49\u90FD\u975E\u5E38\u4E0D\u9519\u3002</p><p>\u5DE9\u4E49\u90A3\u8FB9\u6709\u4E00\u5BB6\u82B1\u96D5\u9189\u9E21\u771F\u5FC3\u4E0D\u9519\uFF0C\u4EF7\u683C\u4FBF\u5B9C\uFF0C2 \u4E2A\u4EBA\u4E0D\u5230 100 \u5143\u5C31\u80FD\u5403\u7684\u5F88\u597D\uFF01\u6700\u5173\u952E\u7684\u662F\u5473\u9053\u771F\u7684\u597D\uFF01\uFF01\uFF01</p><p>\u50CF\u6D59\u83DC\u3001\u8C6B\u83DC\u3001\u706B\u9505\u4E32\u4E32\u8FD9\u8FB9\u90FD\u80FD\u627E\u5230\u6BD4\u8F83\u597D\u5403\u7684\u5E97\u5B50\uFF0C\u53EF\u4EE5\u6EE1\u8DB3\u7EDD\u5927\u90E8\u5206\u5C0F\u4F19\u4F34\u7684\u5473\u857E\u3002</p>',130),o=a("\u4F5C\u8005\uFF1A\u5927\u767D\uFF0C\u8F6C\u8F7D\u94FE\u63A5\uFF1A"),s={href:"https://mp.weixin.qq.com/s/SU9drg2xJKcheIwJ6OSSBQ",target:"_blank",rel:"noopener noreferrer"},g=a("https://mp.weixin.qq.com/s/SU9drg2xJKcheIwJ6OSSBQ"),m=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png",alt:""})],-1);function l(f,u){const t=c("ExternalLinkIcon");return p(),h("div",null,[n,e("blockquote",null,[e("p",null,[o,e("a",s,[g,d(t)])])]),m])}var j=r(i,[["render",l],["__file","zhengzhou.html.vue"]]);export{j as default};
diff --git a/dist/assets/zhengzhou.html.bee29209.js b/dist/assets/zhengzhou.html.bee29209.js
new file mode 100644
index 00000000..131e7232
--- /dev/null
+++ b/dist/assets/zhengzhou.html.bee29209.js
@@ -0,0 +1 @@
+import{_ as r}from"./plugin-vue_export-helper.21dcd24c.js";import{r as c,o as p,c as h,a as e,b as d,e as i,d as a}from"./app.615e41d8.js";const b={},n=i('<h1 id="\u90D1\u5DDE\u90FD\u6709\u54EA\u4E9B\u503C\u5F97\u52A0\u5165\u7684it\u4E92\u8054\u7F51\u516C\u53F8" tabindex="-1"><a class="header-anchor" href="#\u90D1\u5DDE\u90FD\u6709\u54EA\u4E9B\u503C\u5F97\u52A0\u5165\u7684it\u4E92\u8054\u7F51\u516C\u53F8" aria-hidden="true">#</a> \u90D1\u5DDE\u90FD\u6709\u54EA\u4E9B\u503C\u5F97\u52A0\u5165\u7684IT\u4E92\u8054\u7F51\u516C\u53F8\uFF1F</h1><p>\u9996\u5148\u6211\u4EEC\u6765\u770B\u5DE5\u4F5C\u673A\u4F1A\uFF01</p><p>\u4E00\u4F4D\u8BFB\u8005\u7684\u8BC4\u8BBA\u6211\u89C9\u5F97\u7279\u522B\u7684\u597D\uFF0C\u6211\u8D34\u5230\u8FD9\u91CC\u7ED9\u5927\u5BB6\u770B\u4E0B\uFF1A</p><p>\u7F51\u540D&quot;\u5494\u5693&quot;\uFF1A\u4F5C\u4E3A\u5728\u90D1\u5DDE\u5DE5\u4F5C\u7684\u524D\u7AEF\uFF0C\u8868\u793A\u9047\u89C1\u597D\u5382\u7684\u8BDD\uFF0C\u751F\u6D3B\u8282\u594F\u8FD8\u662F\u5F88\u723D\u7684\uFF0C\u623F\u79DF\u4E0D\u8D35\uFF0C\u76F4\u63A5\u4F4F\u516C\u53F8\u65C1\u8FB9\uFF0C\u901A\u52E45\u5206\u949F\uFF0C\u4E0D\u52A0\u73ED\u7684\u8BDD\uFF0C\u6BCF\u5929\u665A\u4E0A6\u70B9\u4E0B\u73ED\uFF0C\u53CC\u4F11\u3002\u786E\u5B9E\u90D1\u5DDE\u4E92\u8054\u7F51\u4E0D\u5F3A\uFF0C\u4F46\u662F\uFF0C\u6211\u4EEC\u4E5F\u4E0D\u5E94\u8BE5\u5FD8\u4E86\u751F\u6D3B\u672C\u8BE5\u6709\u7684\u6837\u5B50\u554A\u3002</p><h2 id="\u5DE5\u4F5C\u673A\u4F1A" tabindex="-1"><a class="header-anchor" href="#\u5DE5\u4F5C\u673A\u4F1A" aria-hidden="true">#</a> \u5DE5\u4F5C\u673A\u4F1A</h2><p>\u90D1\u5DDE\u7684\u4E92\u8054\u7F51\u8D44\u6E90\u8FD8\u662F\u6BD4\u8F83\u532E\u4E4F\u7684\uFF0C\u7A76\u5176\u539F\u56E0\uFF0C\u6211\u89C9\u5F97\u548C\u6559\u80B2\u8D44\u6E90\u7684\u532E\u4E4F\u6709\u975E\u5E38\u5927\u7684\u5173\u7CFB\u3002</p><p>\u6559\u80B2\u8D44\u6E90\u6781\u5EA6\u532E\u4E4F\u5BFC\u81F4\u597D\u7684\u4F01\u4E1A\u4E0D\u6765\uFF0C\u597D\u7684\u4F01\u4E1A\u4E0D\u6765\u53C8\u5BFC\u81F4\u4EBA\u624D\u5916\u6D41\uFF0C\u6076\u6027\u5FAA\u73AF\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-0cd5c4ac-4e67-4b06-b5a3-20fad836824b.png" alt=""></p><h3 id="\u6570\u5B57\u90D1\u5DDE" tabindex="-1"><a class="header-anchor" href="#\u6570\u5B57\u90D1\u5DDE" aria-hidden="true">#</a> \u6570\u5B57\u90D1\u5DDE</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-b88e7ee0-5ab7-40af-8d1d-16cd3eae7b97.png" alt="img"></p><p>\u8FD9\u4E2A\u662F\u963F\u91CC\u548C\u90D1\u5DDE\u7684\u653F\u5E9C\u5408\u4F5C\u7684\uFF0C\u76EE\u524D\u8BC4\u4EF7\u5927\u5BB6\u5BF9\u6570\u5B57\u90D1\u5DDE\u7684\u8BC4\u4EF7\u5F88\u4E0D\u9519\u5440\uFF0C\u85AA\u8D44\u4E5F\u633A\u7ED9\u529B\u7684\uFF0C\u5927\u5BB6\u53EF\u4EE5\u770B\u4E0B Boss \u4E0A\u6570\u5B57\u90D1\u5DDE\u7684\u62DB\u8058\u5C97\u4F4D\u4EE5\u53CA\u85AA\u8D44\u62A5\u4EF7\u5440\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-b1ef6dc9-0859-47fd-9058-a504bf01cd5a.png" alt=""></p><h3 id="\u4E2D\u539F\u94F6\u884C" tabindex="-1"><a class="header-anchor" href="#\u4E2D\u539F\u94F6\u884C" aria-hidden="true">#</a> \u4E2D\u539F\u94F6\u884C</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-db7b6919-2158-4846-914f-f30e028c0234.png" alt="img"></p><p>\u4E2D\u539F\u94F6\u884C\u7684\u5DE5\u8D44\u6BD4\u8F83\u9AD8\uFF0C\u5728\u90D1\u5DDE\u751F\u6D3B\u7684\u8BDD\u53BB\u4E2D\u539F\u94F6\u884C\u662F\u5F88\u4E0D\u9519\u7684\u9009\u62E9\uFF0C\u4E0D\u8FC7\u60F3\u8FDB\u4E2D\u539F\u94F6\u884C\u7684\u8BDD\uFF0C\u4E0D\u662F\u6821\u62DB\u60F3\u8FDB\u53BB\u6709\u70B9\u96BE\u3002\u85AA\u8D44\u6C34\u5E73\u53EF\u4EE5\u770B\u4E0B Boss \u4E0A\u7684\u62DB\u8058\u85AA\u8D44\u6C34\u5E73\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-ce9e2a6e-8743-49b3-83aa-8719da78b7e1.png" alt=""></p><h3 id="\u6D6A\u6F6E" tabindex="-1"><a class="header-anchor" href="#\u6D6A\u6F6E" aria-hidden="true">#</a> \u6D6A\u6F6E</h3><p>\u6D6A\u6F6E\u5728\u90D1\u5DDE\u7684\u7814\u53D1\u4E2D\u5FC3\u6CD5\u5B9A\u8282\u5047\u65E5\u52A0\u73ED\u662F\u6709\u52A0\u73ED\u8D39\u7684\uFF0C\u4F46\u5E73\u65F6\u52A0\u73ED\u5C31\u6CA1\u6709\u52A0\u73ED\u8D39\u4E86\uFF0C\u6BCF\u6708\u8981\u6C42\u52A0\u591F50\u4E2A\u5C0F\u65F6\u7684\u73ED\u3002\u85AA\u8D44\u6C34\u5E73\u5927\u5BB6\u4E5F\u53EF\u4EE5\u53C2\u8003\u4E0B Boss \u4E0A\u653E\u51FA\u7684\u62DB\u8058\u85AA\u8D44\u6C34\u5E73\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-ef0fe9a0-eff2-4037-96d2-ab84a2f76491.png" alt=""></p><h3 id="\u65B0\u534E\u4E09" tabindex="-1"><a class="header-anchor" href="#\u65B0\u534E\u4E09" aria-hidden="true">#</a> \u65B0\u534E\u4E09</h3><p>\u65B0\u534E\u4E09\u5927\u90E8\u5206\u60C5\u51B5\u4E0B\u80FD\u53CC\u4F11\uFF0C\u5468\u672B\u52A0\u73ED\u4E5F\u6709\u52A0\u73ED\u8D39\uFF0C\u4E0D\u8FC7\u6DA8\u85AA\u5F88\u7F13\u6162\u3002\u5728\u7F51\u4E0A\u770B\u5230\u4E00\u4E2A\u5E16\u5B50\uFF0C\u6709\u4EBA\u95EE offer \u9009\u897F\u5B89\u4E2D\u5174\u8FD8\u7B97\u90D1\u5DDE\u65B0\u534E\u4E09\uFF0C\u4E2D\u5174\u548C\u534E\u4E09\u7684\u804C\u5DE5\u90FD\u5728\u4E92\u76F8\u529D\u9000\uFF0C\u8BF4\u8FD9\u662F\u4E00\u4E2A\u9001\u547D\u9898\u3002\u85AA\u8D44\u6C34\u5E73\u5927\u5BB6\u8FD8\u662F\u53C2\u8003\u4E0BBoss\u4E0A\u7684\u62DB\u8058\u85AA\u8D44\u6C34\u5E73\u5427\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-caa46657-f65d-4965-b553-c9f4502f3cc9.png" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-62496f27-fe20-45c6-b116-90a38e607a09.jpg" alt="\u70B9\u51FB\u5E76\u62D6\u62FD\u4EE5\u79FB\u52A8"></p><h3 id="uu-\u8DD1\u817F" tabindex="-1"><a class="header-anchor" href="#uu-\u8DD1\u817F" aria-hidden="true">#</a> UU \u8DD1\u817F</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-624dd61d-2b19-4cb6-b4b6-e1b813fd6baf.png" alt=""></p><p>UU \u8DD1\u817F\u4E3B\u8981\u63D0\u4F9B\u540C\u57CE\u9001\u4EF6\u670D\u52A1\uFF0C\u662F\u90D1\u5DDE\u672C\u571F\u6700\u5927\u7684\u4E92\u8054\u7F51\u516C\u53F8\uFF0C\u96B6\u5C5E\u4E8E\u90D1\u5DDE\u65F6\u7A7A\u96A7\u9053\u4FE1\u606F\u6280\u672F\u6709\u9650\u516C\u53F8\uFF0C\u5730\u5740\u4F4D\u4E8E\u90D1\u5DDE\u5E02\u91D1\u6C34\u533A\u3002</p><p>UU \u8DD1\u817F\u7684\u5DE5\u4F5C\u73AF\u5883\u4EE5\u53CA\u5404\u79CD\u798F\u5229\u90FD\u8FD8\u7B97\u4E0D\u9519\uFF01</p><p>\u9762\u8BD5\u7684\u8BDD\uFF0C\u603B\u4F53\u4F53\u9A8C\u8FD8\u4E0D\u9519\uFF0C\u6280\u672F\u9762\u8BD5\u4E00\u822C\u95EE\u7684\u8FD8\u6BD4\u8F83\u5168\u9762\u3002\u62FF Java \u540E\u7AEF\u5F00\u53D1\u6765\u8BF4\uFF0C\u50CF SQL \u4F18\u5316\u3001\u5206\u5E03\u5F0F\u3001\u7F13\u5B58\u8FD9\u4E9B\u4E00\u822C\u90FD\u4F1A\u95EE\u5230\u3002</p><p>\u85AA\u8D44\u7684\u8BDD\uFF0C\u770B\u51C6\u7F51\u4E0A\u7684\u5E73\u5747\u85AA\u8D44\u662F 10k \u9644\u8FD1\uFF0C\u5176\u4E2D\u540E\u7AEF\u5F00\u53D1\u7684\u85AA\u8D44\u5728 14k \u9644\u8FD1\uFF0C\u524D\u7AEF\u5F00\u53D1\u7684\u85AA\u8D44\u5728 10k \u9644\u8FD1\uFF0C\u8F6F\u4EF6\u6D4B\u8BD5\u7684\u85AA\u8D44\u5728 10k \u9644\u8FD1(\u85AA\u8D44\u6C34\u5E73\u4EC5\u4F9B\u53C2\u8003\uFF0C\u5B9E\u9645\u60C5\u51B5\u56E0\u4EBA\u548C\u5C97\u4F4D\u6216\u8BB8\u4F1A\u6709\u4E00\u4E9B\u51FA\u5165)\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-b3a5d176-a10b-4637-a349-06197ee984a8.png" alt=""></p><h3 id="\u4E2D\u539F\u6D88\u8D39\u91D1\u878D" tabindex="-1"><a class="header-anchor" href="#\u4E2D\u539F\u6D88\u8D39\u91D1\u878D" aria-hidden="true">#</a> \u4E2D\u539F\u6D88\u8D39\u91D1\u878D</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-3317ba70-8310-465c-b36d-60f8e215960c.png" alt=""></p><p>\u6CB3\u5357\u4E2D\u539F\u6D88\u8D39\u91D1\u878D\u80A1\u4EFD\u6709\u9650\u516C\u53F8\u662F\u4E00\u5BB6\u5168\u56FD\u6027\u975E\u94F6\u884C\u91D1\u878D\u673A\u6784\uFF0C\u5730\u5740\u4F4D\u4E8E\u90D1\u5DDE\u5E02\u90D1\u4E1C\u65B0\u533A\u3002</p><p>\u4E2D\u539F\u6D88\u8D39\u91D1\u878D\u7684\u529E\u516C\u73AF\u5883\u975E\u5E38\u4E0D\u9519\uFF0C\u85AA\u8D44\u798F\u5229\u76F8\u5BF9\u4E5F\u8FD8\u4E0D\u9519\u3002</p><p>\u6574\u4F53\u9762\u8BD5\u4F53\u9A8C\u4E0D\u9519\uFF0C\u6548\u7387\u4E5F\u975E\u5E38\u9AD8\uFF0C\u50CF\u6280\u672F\u9762\u8BD5\u7684\u8BDD\u4E00\u822C\u662F\u4E09\u8F6E\u6216\u8005\u56DB\u8F6E\u3002\u4E0D\u8FC7\uFF0C\u4E2D\u539F\u6D88\u8D39\u91D1\u878D\u6BD4\u8F83\u770B\u91CD\u5B66\u5386\uFF0C985/211 \u4E0A\u5CB8\u7684\u51E0\u7387\u6BD4\u8F83\u5927\u3002</p><p>\u85AA\u8D44\u7684\u8BDD\uFF0C\u770B\u51C6\u7F51\u4E0A\u7684\u5E73\u5747\u85AA\u8D44\u662F 16k \u9644\u8FD1\uFF0C\u5176\u4E2D\u540E\u7AEF\u5F00\u53D1\u7684\u85AA\u8D44\u5728 17k \u9644\u8FD1\uFF0C\u524D\u7AEF\u5F00\u53D1\u7684\u85AA\u8D44\u5728 16k \u9644\u8FD1\uFF0C\u8F6F\u4EF6\u6D4B\u8BD5\u7684\u85AA\u8D44\u5728 14k \u9644\u8FD1(\u85AA\u8D44\u6C34\u5E73\u4EC5\u4F9B\u53C2\u8003\uFF0C\u5B9E\u9645\u60C5\u51B5\u56E0\u4EBA\u548C\u5C97\u4F4D\u6216\u8BB8\u4F1A\u6709\u4E00\u4E9B\u51FA\u5165\uFF0C\u5E94\u8BE5\u5230\u4E0D\u4E86\u8FD9\u4E48\u9AD8)\u3002</p><p>\u6CE8\u610F\uFF1A\u5927\u5BB6\u6CE8\u610F\u4E00\u4E2A\u60C5\u51B5\uFF0C\u4E2D\u539F\u6D88\u8D39\u7684\u8F6F\u4EF6\u7814\u53D1\u5C97\u4F4D\u5927\u90E8\u5206\u90FD\u642C\u8FC1\u5230\u4E0A\u6D77\u4E86\uFF0C\u76EE\u524D\u5728\u90D1\u5DDE\u7684\u5927\u90E8\u5206\u662F\u884C\u653F\u5C97\u4F4D\uFF0C\u53EA\u6709\u5C11\u90E8\u5206\u7814\u53D1\u5C97\u4F4D\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-6de95df2-4c10-44af-9ddb-935cb358def6.png" alt=""></p><h3 id="\u5200\u950B\u4E92\u5A31" tabindex="-1"><a class="header-anchor" href="#\u5200\u950B\u4E92\u5A31" aria-hidden="true">#</a> \u5200\u950B\u4E92\u5A31</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-aa02294b-e809-49b6-9e96-4ec44db676c3.png" alt=""></p><p>\u5200\u950B\u4E92\u5A31\u662F\u4E00\u5BB6\u4E13\u6CE8\u6E38\u620F\u670D\u52A1\u5E02\u573A\u7684\u4E92\u8054\u7F51\u516C\u53F8\uFF0C2019 \u5E74\u5B8C\u6210 A+\u8F6E\u878D\u8D44\uFF0C\u5E73\u53F0\u6CE8\u518C\u7528\u6237\u91CF\u7A81\u7834\u5343\u4E07\u3002</p><p>\u65D7\u4E0B\u6BD4\u8F83\u51FA\u540D\u7684\u4EA7\u54C1\u6709\u79DF\u53F7\u73A9\u3001\u4E00\u6D3E\u966A\u73A9\uFF0C\u90FD\u662F\u548C\u6E38\u620F\u9886\u57DF\u76F8\u5173\u7684\u4EA7\u54C1\u3002\u76F8\u4FE1\u6BD4\u8F83\u559C\u6B22\u73A9\u6E38\u620F\u7684\u5C0F\u4F19\u4F34\u5E94\u8BE5\u5BF9\u8FD9\u4E2A\u4E24\u4E2A\u4EA7\u54C1\u6709\u4E86\u89E3\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-ec100440-a50e-4f27-88e4-4b075cf12676.png" alt=""></p><p>\u6574\u4F53\u9762\u8BD5\u4E0D\u662F\u5F88\u96BE\uFF0C\u85AA\u8D44\u76F8\u5BF9\u6765\u8BF4\u4E5F\u8FD8\u53EF\u4EE5\u3002</p><p>\u85AA\u8D44\u7684\u8BDD\uFF0C\u770B\u51C6\u7F51\u4E0A\u7684\u5E73\u5747\u85AA\u8D44\u662F 16k \u9644\u8FD1\uFF0C\u5176\u4E2D\u540E\u7AEF\u5F00\u53D1\uFF08C++\uFF09\u7684\u85AA\u8D44\u5728 20k \u9644\u8FD1\uFF0C\u524D\u7AEF\u5F00\u53D1\u7684\u85AA\u8D44\u5728 8.5k \u9644\u8FD1\uFF0C\u8F6F\u4EF6\u6D4B\u8BD5\u7684\u85AA\u8D44\u5728 9.5k \u9644\u8FD1(\u85AA\u8D44\u6C34\u5E73\u4EC5\u4F9B\u53C2\u8003\uFF0C\u5B9E\u9645\u60C5\u51B5\u56E0\u4EBA\u548C\u5C97\u4F4D\u6216\u8BB8\u4F1A\u6709\u4E00\u4E9B\u51FA\u5165)\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-1b7640e6-deee-42f6-8df7-639555c5d236.png" alt=""></p><h3 id="\u65B0\u5F00\u666E" tabindex="-1"><a class="header-anchor" href="#\u65B0\u5F00\u666E" aria-hidden="true">#</a> \u65B0\u5F00\u666E</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-ca1cf626-13aa-4081-b6c0-285893458dde.png" alt=""></p><p>\u65B0\u5F00\u666E\u4E5F\u662F\u90D1\u5DDE\u7684\u4E00\u5BB6\u672C\u571F\u4E92\u8054\u7F51\u516C\u53F8\uFF0C\u6210\u7ACB\u4E8E\u90D1\u5DDE\u9AD8\u65B0\u6280\u672F\u4EA7\u4E1A\u5F00\u53D1\u533A\uFF0C\u4E3B\u8981\u505A NFC \u8FD1\u573A\u79FB\u52A8\u652F\u4ED8\u3001\u91D1\u878D IC \u5361\u7B49\u4E1A\u52A1\u3002</p><p>\u65B0\u5F00\u666E\u662F\u76EE\u524D\u56FD\u5185\u4E00\u5361\u901A\u884C\u4E1A\u552F\u4E00\u4E00\u5BB6\u4E0A\u5E02\u516C\u53F8\uFF0C\u5DF2\u7ECF\u4E3A\u5168\u56FD\u5343\u6240\u9AD8\u6821\uFF0C\u5343\u4E07\u540D\u5927\u5B66\u751F\u63D0\u4F9B\u670D\u52A1\u3002</p><p>\u6280\u672F\u9762\u8BD5\u7684\u8BDD\uFF0C\u4E00\u822C\u7B2C\u4E00\u9762\u662F\u7B14\u8BD5\uFF0C\u7B14\u8BD5\u4E4B\u540E\u4F1A\u518D\u95EE\u4F60\u4E00\u4E9B\u76F8\u5173\u7684\u6280\u672F\u95EE\u9898\u3002</p><p>\u85AA\u8D44\u7684\u8BDD\uFF0C\u770B\u51C6\u7F51\u4E0A\u7684\u5E73\u5747\u85AA\u8D44\u662F 7.6k \u9644\u8FD1\uFF0C\u5176\u4E2D\u540E\u7AEF\u5F00\u53D1\uFF08Java\uFF09\u7684\u85AA\u8D44\u5728 9k \u9644\u8FD1\uFF0C\u524D\u7AEF\u5F00\u53D1\u7684\u85AA\u8D44\u5728 9k \u9644\u8FD1\uFF0C\u8F6F\u4EF6\u6D4B\u8BD5\u7684\u85AA\u8D44\u5728 5.5k \u9644\u8FD1(\u85AA\u8D44\u6C34\u5E73\u4EC5\u4F9B\u53C2\u8003\uFF0C\u5B9E\u9645\u60C5\u51B5\u56E0\u4EBA\u548C\u5C97\u4F4D\u6216\u8BB8\u4F1A\u6709\u4E00\u4E9B\u51FA\u5165)\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-dca4c23e-7310-4a60-b338-25f3e92d3339.png" alt=""></p><h3 id="\u4E2D\u79FB\u5728\u7EBF" tabindex="-1"><a class="header-anchor" href="#\u4E2D\u79FB\u5728\u7EBF" aria-hidden="true">#</a> \u4E2D\u79FB\u5728\u7EBF</h3><p>\u4E2D\u56FD\u79FB\u52A8\u65D7\u4E0B\u7684\u4E00\u5BB6\u201C\u4E92\u8054\u7F51\u201D\u516C\u53F8\uFF0C\u5B9E\u9645\u4E0D\u50CF\u662F\u201C\u4E92\u8054\u7F51\u201D\u516C\u53F8\u3002</p><p>\u5BF9\u4E8E\u6280\u672F\u5F00\u53D1\u6765\u8BF4\uFF0C\u53BB\u4E2D\u79FB\u5728\u7EBF\u4E00\u662F\u5BF9\u6280\u672F\u6CA1\u6709\u63D0\u5347\u6216\u8005\u6311\u6218\uFF0C\u4E8C\u662F\u5DE5\u8D44\u662F\u771F\u7684\u4F4E\uFF08\u770B\u51C6\u7F51\u4E0A\u7684 Java \u5F00\u53D1\u85AA\u8D44\u5728 8k \u9644\u8FD1\uFF09\u3002</p><p>\u771F\u5FC3\u4E0D\u592A\u5EFA\u8BAE\u53BB\uFF0C\u9664\u975E\u4F60\u6CA1\u6709\u5176\u4ED6\u66F4\u597D\u7684\u9009\u62E9\u3002</p><p>\u6211\u80FD\u60F3\u5230\u552F\u4E00\u7684\u4F18\u52BF\u53EF\u80FD\u662F\u516C\u53F8\u76F8\u5BF9\u6765\u8BF4\u80FD\u63D0\u4F9B\u7ED9\u4F60\u7684\u4E00\u4E2A\u76F8\u5BF9\u7A33\u5B9A\u7684\u5DE5\u4F5C\u3002</p><h3 id="\u7231\u4E91\u6821" tabindex="-1"><a class="header-anchor" href="#\u7231\u4E91\u6821" aria-hidden="true">#</a> \u7231\u4E91\u6821</h3><p>\u7231\u4E91\u6821\u5E38\u89C1\u4E8E 2014 \u5E74\uFF0C\u4E3B\u8981\u505A\u7684\u662F\u5728\u6821\u6559\u80B2\u8FD9\u5757\uFF0C\u81F4\u529B\u4E8E\u901A\u8FC7 AI \u5EFA\u4E00\u6240\u4E91\u4E0A\u7684\u5B66\u6821\u3002</p><p>\u5355\u770B\u516C\u53F8\u6240\u505A\u7684\u4E1A\u52A1\u65B9\u5411\u6765\u8BF4\uFF0C\u53D1\u5C55\u76F8\u5BF9\u6765\u8BF4\u8FD8\u662F\u4E0D\u9519\u7684\u3002\u4E0D\u8FC7\uFF0C\u636E\u8BF4\u516C\u53F8\u7684\u7BA1\u7406\u771F\u7684\u662F\u6E23\u5230\u4E86\u4E00\u5B9A\u7A0B\u5EA6\u3002</p><p>\u53E6\u5916\uFF0C\u6839\u636E\u5927\u90E8\u5206\u9762\u8BD5\u6C42\u804C\u8005\u7684\u53CD\u9988\u6765\u770B\uFF0C\u8FD9\u5BB6\u516C\u53F8\u7684\u6574\u4F53\u9762\u8BD5\u4F53\u9A8C\u6BD4\u8F83\u5DEE\u3002</p><p>\u85AA\u8D44\u7684\u8BDD\uFF0C\u770B\u51C6\u7F51\u4E0A\u7684\u5E73\u5747\u85AA\u8D44\u662F 12k \u9644\u8FD1\uFF0C\u5176\u4E2D\u540E\u7AEF\u5F00\u53D1\uFF08Java\uFF09\u7684\u85AA\u8D44\u5728 14k \u9644\u8FD1\uFF0C\u524D\u7AEF\u5F00\u53D1\u7684\u85AA\u8D44\u5728 8k \u9644\u8FD1\uFF0C\u8F6F\u4EF6\u6D4B\u8BD5\u7684\u85AA\u8D44\u5728 10k \u9644\u8FD1(\u85AA\u8D44\u6C34\u5E73\u4EC5\u4F9B\u53C2\u8003\uFF0C\u5B9E\u9645\u60C5\u51B5\u56E0\u4EBA\u548C\u5C97\u4F4D\u6216\u8BB8\u4F1A\u6709\u4E00\u4E9B\u51FA\u5165)\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-90273777-d5d0-424a-a8b0-e5df53455ef9.png" alt=""></p><h3 id="\u5999\u4F18\u8F66" tabindex="-1"><a class="header-anchor" href="#\u5999\u4F18\u8F66" aria-hidden="true">#</a> \u5999\u4F18\u8F66</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-b6ca12ab-ecb5-4b01-9cf3-21b22da0d67a.png" alt=""></p><p>\u5999\u4F18\u8F66\u4E3B\u8981\u505A\u7684\u662F\u6C7D\u8F66\u65B9\u9762\u7684\u4E1A\u52A1\uFF0C\u6DB5\u76D6\u6574\u8F66\u9500\u552E\u3001\u6C7D\u8F66\u91D1\u878D\u3001\u6C7D\u8F66\u4FDD\u9669\u3001\u6C7D\u8F66\u7528\u54C1\u3001\u6C7D\u8F66\u7F8E\u5BB9\u7B49\u65B9\u9762\u3002</p><p>\u516C\u53F8\u53D1\u5C55\u4E00\u822C\uFF0C\u7F51\u4E0A\u4E5F\u6709\u4E00\u4E9B\u9ED1\u5386\u53F2(\u53EF\u4EE5\u81EA\u5DF1\u67E5\u4E00\u4E0B)\u3002</p><p>\u4E0D\u8FC7\uFF0C\u6839\u636E\u5927\u90E8\u5206\u9762\u8BD5\u6C42\u804C\u8005\u7684\u53CD\u9988\u6765\u770B\uFF0C\u8FD9\u5BB6\u516C\u53F8\u7684\u6574\u4F53\u9762\u8BD5\u4F53\u9A8C\u8FD8\u662F\u53EF\u4EE5\u7684\u3002</p><p>\u85AA\u8D44\u8FD9\u5757\u7684\u4E00\u822C\u504F\u4E0A\uFF0C\u770B\u51C6\u7F51\u4E0A\u7684\u5E73\u5747\u85AA\u8D44\u662F 11k \u9644\u8FD1\uFF0C\u5176\u4E2D\u540E\u7AEF\u5F00\u53D1\uFF08Java\uFF09\u7684\u85AA\u8D44\u5728 12k \u9644\u8FD1\uFF0C\u524D\u7AEF\u5F00\u53D1\u7684\u85AA\u8D44\u5728 10k \u9644\u8FD1(\u85AA\u8D44\u6C34\u5E73\u4EC5\u4F9B\u53C2\u8003\uFF0C\u5B9E\u9645\u60C5\u51B5\u56E0\u4EBA\u548C\u5C97\u4F4D\u6216\u8BB8\u4F1A\u6709\u4E00\u4E9B\u51FA\u5165)\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-491c2bc1-5cea-48e6-ad47-80eb92ddaa3d.png" alt=""></p><h3 id="\u817E\u6CB3" tabindex="-1"><a class="header-anchor" href="#\u817E\u6CB3" aria-hidden="true">#</a> \u817E\u6CB3</h3><p>\u817E\u8BAF\u662F\u6CB3\u5357\u817E\u6CB3\u7F51\u7EDC\u79D1\u6280\u6709\u9650\u516C\u53F8\u7684\u6700\u5927\u80A1\u4E1C\uFF0C\u7B2C\u4E8C\u5927\u80A1\u4E1C\u662F\u6CB3\u5357\u65E5\u62A5\u3002</p><p>\u4E3B\u8981\u505A\u7684\u4E1A\u52A1\u65B9\u5411\u662F\u6CB3\u5357\u57CE\u5E02\u751F\u6D3B\u7B2C\u4E00\u7F51\u3002</p><p>\u5DE5\u8D44\u6BD4\u8F83\u4F4E\uFF0C\u53E6\u5916\uFF0C\u540E\u7AEF\u8FD9\u5757\u597D\u50CF\u53EA\u62DB PHP\u3002</p><h3 id="\u771F\u4E8C\u7F51" tabindex="-1"><a class="header-anchor" href="#\u771F\u4E8C\u7F51" aria-hidden="true">#</a> \u771F\u4E8C\u7F51</h3><p>\u4E0D\u5F97\u4E0D\u8BF4\uFF0C\u8FD9\u4E2A\u540D\u5B57\u6709\u70B9\u4E1C\u897F\uFF01</p><p>\u771F\u4E8C\u7F51\u521B\u7ACB\u4E8E 2014 \u5E74\uFF0C\u4E5F\u662F\u90D1\u5DDE\u672C\u571F\u7684\u4E00\u5BB6\u4E92\u8054\u7F51\u516C\u53F8\uFF0C\u4E3B\u8981\u505A C2C \u6A21\u5F0F\u7684 0 \u4E2D\u4ECB\u8D39\u771F\u5B9E\u4E8C\u624B\u623F\u4EA4\u6613\u5E73\u53F0\u3002</p><p>\u5DE5\u8D44\u6BD4\u8F83\u4F4E\uFF0C\u53E6\u5916\uFF0C\u540E\u7AEF\u8FD9\u5757\u597D\u50CF\u53EA\u62DB PHP\u3002</p><h3 id="\u7855\u8BFA\u79D1\u6280" tabindex="-1"><a class="header-anchor" href="#\u7855\u8BFA\u79D1\u6280" aria-hidden="true">#</a> \u7855\u8BFA\u79D1\u6280</h3><p>\u7855\u8BFA\u79D1\u6280\u521B\u7ACB\u4E8E 2014 \u5E74\uFF0C\u603B\u90E8\u4F4D\u4E8E\u4E0A\u6D77\uFF0C\u4E3B\u8981\u505A\u7269\u6D41\u8F6F\u4EF6\u7CFB\u7EDF\u9AD8\u7AEF\u5B9A\u5236\u7684\u8F6F\u4EF6\u5F00\u53D1\u3002</p><p>\u7F51\u4E0A\u53EF\u4EE5\u67E5\u5230\u7684\u6D88\u606F\u6BD4\u8F83\u5C11\uFF0C\u611F\u5174\u8DA3\u7684\u5C0F\u4F19\u4F34\u53EF\u4EE5\u81EA\u5DF1\u53BB\u67E5\u4E00\u4E0B\u76F8\u5173\u4FE1\u606F\u554A\uFF01</p><p>\u53E6\u5916\uFF0C\u5982\u679C\u6709\u5C0F\u4F19\u4F34\u5BF9\u8FD9\u5BB6\u516C\u53F8\u6BD4\u8F83\u4E86\u89E3\uFF0C\u4E5F\u53EF\u4EE5\u5728\u8BC4\u8BBA\u533A\u8BF4\u4E00\u4E0B\u554A\uFF01</p><h3 id="\u79D1\u5927\u8BAF\u98DE" tabindex="-1"><a class="header-anchor" href="#\u79D1\u5927\u8BAF\u98DE" aria-hidden="true">#</a> \u79D1\u5927\u8BAF\u98DE</h3><p>\u79D1\u5927\u8BAF\u98DE\u5728\u90D1\u5DDE\u91D1\u6C34\u533A\u6709\u4E00\u4E2A\u5C0F\u5206\u90E8\uFF0C\u5927\u90E8\u5206\u62DB\u8058\u7684\u90FD\u662F\u548C\u6280\u672F\u65E0\u5173\u7684\u5C97\u4F4D\uFF0C\u4E0D\u8FC7\u4E5F\u6709\u4E00\u4E2A Java \u5F00\u53D1\u5C97\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-dc1517e7-c93b-457f-96d2-0871c17bf916.png" alt=""></p><h3 id="\u5B57\u8282\u8DF3\u52A8" tabindex="-1"><a class="header-anchor" href="#\u5B57\u8282\u8DF3\u52A8" aria-hidden="true">#</a> \u5B57\u8282\u8DF3\u52A8</h3><p>\u90D1\u5DDE\u4E5F\u6709\u5B57\u8282\u8DF3\u52A8\u5206\u90E8\uFF0C\u4E0D\u8FC7\u90FD\u662F\u548C\u5E02\u573A\u62D3\u5C55\u4E0E\u8FD0\u8425\u76F8\u5173\u7684\u5C97\u4F4D\uFF0C\u50CF\u6280\u672F\u5F00\u53D1\u5C97\u662F\u6CA1\u6709\u7684\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-c7d11e68-2b85-4895-a3c5-44f6816ccfb2.png" alt=""></p><p>\u7C7B\u4F3C\u7684\u8FD8\u6709\u7F8E\u56E2\u3001\u534E\u4E3A\u3001\u963F\u91CC\u5DF4\u5DF4\u7B49\u5927\u5382\uFF0C\u8FD9\u4E9B\u516C\u53F8\u5728\u90D1\u5DDE\u62DB\u8058\u7684\u57FA\u672C\u4E5F\u90FD\u662F\u975E\u6280\u672F\u5C97\u4F4D\u3002</p><h3 id="\u5176\u4ED6" tabindex="-1"><a class="header-anchor" href="#\u5176\u4ED6" aria-hidden="true">#</a> \u5176\u4ED6</h3><p>\u5176\u4ED6\u8FD8\u6709\u50CF\u90D1\u5DDE\u70B9\u8BFB\u7535\u5B50\u79D1\u6280\u6709\u9650\u516C\u53F8\uFF08\u65D7\u4E0B\u4EA7\u54C1\u6709\u54BF\u5566\u770B\u4E66\uFF09\u3001\u7FB2\u548C\u7F51\u7EDC\uFF08\u6CB3\u5357\u552F\u4E00\u4E00\u5BB6\u6E38\u620F\u4E0A\u5E02\u4F01\u4E1A\uFF09\u3001\u7C73\u5B85\uFF08\u4E2D\u56FD\u77E5\u540D\u7684\u697C\u5E02\u81EA\u5A92\u4F53\uFF0C\u65B0\u4E09\u677F\u4E0A\u5E02\u4F01\u4E1A\uFF09\u7B49\u4E92\u8054\u7F51\u516C\u53F8\uFF0C\u611F\u5174\u8DA3\u7684\u5C0F\u4F19\u4F34\u53EF\u4EE5\u81EA\u884C\u67E5\u9605\u76F8\u5173\u4FE1\u606F\u5440\uFF01</p><p>\u8BFB\u8005\u8865\u5145\uFF1A\u6D77\u5EB7\u5A01\u89C6\u3001APUS\u3001\u4E91\u9E1F\u3001\u4E9A\u4FE1\u79D1\u6280\u3001\u7267\u539F\u98DF\u54C1\u3001\u5C0F\u9C7C\u6613\u8054\u3001\u795E\u5DDE\u4FE1\u606F\u3001\u4E91\u667A\u6167\u90FD\u5728\u90D1\u5DDE\u62DB\u5F00\u53D1\u5DE5\u7A0B\u5E08\u3002</p><h2 id="\u751F\u6D3B\u73AF\u5883-\u751F\u6D3B\u6210\u672C" tabindex="-1"><a class="header-anchor" href="#\u751F\u6D3B\u73AF\u5883-\u751F\u6D3B\u6210\u672C" aria-hidden="true">#</a> \u751F\u6D3B\u73AF\u5883&amp;\u751F\u6D3B\u6210\u672C</h2><p>\u6211\u4EEC\u518D\u6765\u770B\u770B\u751F\u6D3B\u73AF\u5883\u548C\u751F\u6D3B\u6210\u672C\u3002</p><h3 id="\u623F\u4EF7" tabindex="-1"><a class="header-anchor" href="#\u623F\u4EF7" aria-hidden="true">#</a> \u623F\u4EF7</h3><p>\u90D1\u5DDE\u7684\u623F\u4EF7\u5BF9\u4E8E\u5176\u53D1\u5C55\u6765\u8BF4\u8FD8\u662F\u6BD4\u8F83\u8D35\u7684\u3002\u5F53\u7136\u4E86\uFF0C\u76F8\u6BD4\u4E8E\u4E00\u7EBF\u57CE\u5E02\u80AF\u5B9A\u8FD8\u662F\u8981\u4FBF\u5B9C\u5F88\u591A\u7684\uFF01</p><p>\u4EE5\u4E0B\u623F\u4EF7\u6570\u636E\u6765\u6E90\u4E8E\u5B89\u5C45\u5BA2\uFF0C\u53EF\u4EE5\u4F5C\u4E3A\u53C2\u8003\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-95ec5784-5064-488c-bce8-4c076115a021.png" alt=""></p><h3 id="\u6559\u80B2" tabindex="-1"><a class="header-anchor" href="#\u6559\u80B2" aria-hidden="true">#</a> \u6559\u80B2</h3><p>\u90D1\u5DDE\u7684\u6559\u80B2\u8D44\u6E90\u6781\u5EA6\u532E\u4E4F\uFF01\u636E\u7EDF\u8BA1\u90D1\u5DDE\u4E00\u5171\u6709 65 \u6240\u9AD8\u6821\uFF0C\u5176\u4E2D\uFF0C\u672C\u79D1 26 \u6240\uFF0C\u4E13\u79D1 39 \u6240\u3002</p><p>\u4E0D\u8FC7\uFF0C211 \u9662\u6821\u4EC5\u6709\u4E00\u6240\u2014\u2014\u90D1\u5DDE\u5927\u5B66\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-03294872-3914-441b-ae6b-55200bce097a.png" alt=""></p><p>\u662F\u7684\uFF01\u4F5C\u4E3A\u504C\u5927\u7684\u6CB3\u5357\u7701\u7684\u7701\u4F1A\uFF0C\u56FD\u5BB6\u5386\u53F2\u6587\u5316\u540D\u57CE\uFF0C\u4E5F\u5C31\u53EA\u6709\u4E00\u6240 211\uFF01</p><p>\u6211\u4EEC\u6765\u5BF9\u6BD4\u4E00\u4E0B\u6E56\u5317\u7701\u7701\u4F1A\u6B66\u6C49\uFF0C\u6B66\u6C49 7 \u6240 985/211 \u9AD8\u6821\uFF0C\u5206\u522B\u662F\u6B66\u6C49\u5927\u5B66\u3001\u534E\u4E2D\u79D1\u6280\u5927\u5B66\u3001\u4E2D\u56FD\u5730\u8D28\u5927\u5B66\u3001\u6B66\u6C49\u7406\u5DE5\u5927\u5B66\u3001\u534E\u4E2D\u5E08\u8303\u5927\u5B66\u3001\u534E\u4E2D\u519C\u4E1A\u5927\u5B66\u3001\u4E2D\u5357\u8D22\u7ECF\u653F\u6CD5\u5927\u5B66\u3002</p><p>\u518D\u6765\u5BF9\u6BD4\u4E00\u4E0B\u6E56\u5357\u7701\u7701\u4F1A\u957F\u6C99\uFF0C\u957F\u6C99\u6709 4 \u6240 985/211 \u9AD8\u6821\uFF0C\u5206\u522B\u662F\u56FD\u9632\u79D1\u5927\u3001\u4E2D\u5357\u5927\u5B66\u3001\u6E56\u5357\u5927\u5B66\u3001\u6E56\u5357\u5E08\u8303\u5927\u5B66\u3002</p><h3 id="\u533B\u7597" tabindex="-1"><a class="header-anchor" href="#\u533B\u7597" aria-hidden="true">#</a> \u533B\u7597</h3><p>\u90D1\u5DDE\u7684\u6BCF\u4E07\u4EBA\u5E8A\u4F4D\u6570\u6392\u540D\u6BD4\u8F83\u9760\u524D\u3002</p><p>\u53E6\u5916\uFF0C\u90D1\u5DDE\u5E02\u7684\u4F18\u8D28\u533B\u7597\u8D44\u6E90\uFF0C\u5728\u91D1\u6C34\u533A\u3001\u4E2D\u539F\u533A\u3001\u7BA1\u57CE\u533A\u6BD4\u8F83\u96C6\u4E2D\uFF1B</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-6bbd8d11-dbe5-43c4-9354-b422b7fe1f77.png" alt=""></p><h3 id="\u672C\u5730\u5C45\u6C11" tabindex="-1"><a class="header-anchor" href="#\u672C\u5730\u5C45\u6C11" aria-hidden="true">#</a> \u672C\u5730\u5C45\u6C11</h3><p>\u7F51\u4E0A\u6709\u5F88\u591A\u201C\u6CB3\u5357\u9ED1\u201D\uFF0C\u8BA9\u5F88\u591A\u4EBA\u5BF9\u6CB3\u5357\u7684\u5F71\u54CD\u4E0D\u597D\uFF01</p><p>\u5B9E\u9645\u60C5\u51B5\u53EF\u80FD\u5E76\u4E0D\u662F\u8FD9\u6837\u7684\uFF01\u90D1\u5DDE\u672C\u5730\u5C45\u6C11\u4E0D\u6392\u5916\uFF0C\u7EDD\u5927\u90E8\u5206\u90FD\u7279\u522B\u8001\u5B9E\uFF0C\u672C\u672C\u5206\u5206\u3002</p><p>\u6211\u53BB\u8FC7\u5F88\u591A\u57CE\u5E02\uFF0C\u90D1\u5DDE\u4EBA\u7684\u53CB\u5584\u7A0B\u5EA6\u6211\u89C9\u5F97\u662F\u53EF\u4EE5\u6392\u5728 Top \u7EA7\u522B\u7684\uFF01</p><p>\u53E6\u5916\uFF0C\u90D1\u5DDE\u8FD9\u8FB9\u7684\u5C45\u6C11\u8FD8\u662F\u6BD4\u8F83\u604B\u5BB6\u7684\u3002\u6709\u5F88\u591A\u5728\u5317\u4E0A\u5E7F\u6DF7\u7684\u8FD8\u4E0D\u9519\u7684\u4EBA\uFF0C\u6700\u540E\u4E5F\u8FD8\u662F\u9009\u62E9\u56DE\u6765\uFF01</p><h3 id="\u4EA4\u901A" tabindex="-1"><a class="header-anchor" href="#\u4EA4\u901A" aria-hidden="true">#</a> \u4EA4\u901A</h3><p>\u4F5C\u4E3A\u4E00\u4E2A\u5317\u65B9\u5185\u9646\u57CE\u5E02\uFF0C\u90D1\u5DDE\u53EF\u4EE5\u8BF4\u662F\u4E00\u4E2A\u201C\u4EA4\u901A\u67A2\u7EBD\u201D\u3002\u4ECE\u90D1\u5DDE\u51FA\u53D1\u5750\u9AD8\u94C1\uFF0C\u4F60\u53BB\u56FD\u5185\u5927\u90E8\u5206\u5730\u65B9\u90FD\u975E\u5E38\u65B9\u4FBF\u3002</p><p>\u4E0B\u56FE\u4E2D\u7684\u90E8\u5206\u9AD8\u94C1\u7EBF\u8DEF\u6B63\u5728\u4FEE\u5EFA\uFF0C\u6BD4\u5982\u90D1\u4E07\u9AD8\u94C1\u5168\u7EBF\u5927\u6982\u662F 2021 \u5E74\u4E2D\u65EC\u901A\u8F66\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-0a4d6b3c-a756-4509-a6fd-f3a65f018c84.png" alt=""></p><p>\u90D1\u5DDE\u7684\u5730\u94C1\u89C4\u5212\u60C5\u51B5\u5982\u4E0B\u56FE\u6240\u793A\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-264ab1f2-f355-466a-ab5d-2dc21668e888.gif" alt=""></p><p>\u76EE\u524D\u7684\u8BDD\uFF0C\u90D1\u5DDE\u5730\u94C1\u6709 1 \u53F7\u7EBF\u30012 \u53F7\u7EBF\u30013 \u53F7\u7EBF\u30014 \u53F7\u7EBF\u3001\u57CE\u90CA\u7EBF\u30015 \u53F7\u7EBF\u300114 \u53F7\u7EBF\u4E00\u671F 7 \u6761\u5730\u94C1\u7EBF\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-c5e61f03-efcb-4e56-b9bf-ff7bcec3dce0" alt=""></p><h3 id="\u7F8E\u98DF" tabindex="-1"><a class="header-anchor" href="#\u7F8E\u98DF" aria-hidden="true">#</a> \u7F8E\u98DF</h3><p>\u90D1\u5DDE\u7684\u5404\u79CD\u5546\u4E1A\u8BBE\u65BD\u8FD8\u662F\u6BD4\u8F83\u9F50\u5168\u7684\uFF0C\u6709\u5F88\u591A\u5927\u578B\u7684\u5546\u573A\uFF0C\u5546\u573A\u91CC\u9762\u57FA\u672C\u662F\u6837\u6837\u4FF1\u5168\u3002</p><p>\u90D1\u5DDE\u597D\u5403\u7684\u8FD8\u633A\u591A\u7684\uFF01\u53BB\u4E86\u90D1\u5DDE\u4E4B\u540E\uFF0C\u4E00\u5B9A\u8981\u53BB\u559D\u80E1\u8FA3\u6C64\uFF0C\u771F\u7684\u4E0D\u8981\u592A\u597D\u559D\uFF01</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-757eed5b-4b81-4bb0-a0e1-b24e510cc707.png" alt=""></p><p>\u672C\u5730\u7684\u7F8E\u98DF\u8FD8\u6709\u70E9\u9762\u3001\u7116\u997C\u3001\u70E7\u9E21\u7B49\u7B49\u90FD\u975E\u5E38\u4E0D\u9519\u3002</p><p>\u5DE9\u4E49\u90A3\u8FB9\u6709\u4E00\u5BB6\u82B1\u96D5\u9189\u9E21\u771F\u5FC3\u4E0D\u9519\uFF0C\u4EF7\u683C\u4FBF\u5B9C\uFF0C2 \u4E2A\u4EBA\u4E0D\u5230 100 \u5143\u5C31\u80FD\u5403\u7684\u5F88\u597D\uFF01\u6700\u5173\u952E\u7684\u662F\u5473\u9053\u771F\u7684\u597D\uFF01\uFF01\uFF01</p><p>\u50CF\u6D59\u83DC\u3001\u8C6B\u83DC\u3001\u706B\u9505\u4E32\u4E32\u8FD9\u8FB9\u90FD\u80FD\u627E\u5230\u6BD4\u8F83\u597D\u5403\u7684\u5E97\u5B50\uFF0C\u53EF\u4EE5\u6EE1\u8DB3\u7EDD\u5927\u90E8\u5206\u5C0F\u4F19\u4F34\u7684\u5473\u857E\u3002</p>',130),o=a("\u4F5C\u8005\uFF1A\u5927\u767D\uFF0C\u8F6C\u8F7D\u94FE\u63A5\uFF1A"),s={href:"https://mp.weixin.qq.com/s/SU9drg2xJKcheIwJ6OSSBQ",target:"_blank",rel:"noopener noreferrer"},g=a("https://mp.weixin.qq.com/s/SU9drg2xJKcheIwJ6OSSBQ"),m=e("p",null,[e("img",{src:"http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png",alt:""})],-1);function l(f,u){const t=c("ExternalLinkIcon");return p(),h("div",null,[n,e("blockquote",null,[e("p",null,[o,e("a",s,[g,d(t)])])]),m])}var j=r(b,[["render",l],["__file","zhengzhou.html.vue"]]);export{j as default};
diff --git a/dist/assets/zhengzhou.html.c309c263.js b/dist/assets/zhengzhou.html.c309c263.js
new file mode 100644
index 00000000..74bff66c
--- /dev/null
+++ b/dist/assets/zhengzhou.html.c309c263.js
@@ -0,0 +1 @@
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diff --git a/dist/assets/zhihu-1000wan.html.6f71965a.js b/dist/assets/zhihu-1000wan.html.51362a9b.js
similarity index 99%
rename from dist/assets/zhihu-1000wan.html.6f71965a.js
rename to dist/assets/zhihu-1000wan.html.51362a9b.js
index cf8ce11d..2a9c8c27 100644
--- a/dist/assets/zhihu-1000wan.html.6f71965a.js
+++ b/dist/assets/zhihu-1000wan.html.51362a9b.js
@@ -1 +1 @@
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src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/zhihu-1000wan-4612a83f-6207-496c-b32b-c6f1ab031c4f.png" alt=""></p><p>\u867D\u7136\u6709\u4E9B\u57CB\u6CA1\u7684\u5E16\u5B50\u6211\u89C9\u5F97\u4EF7\u503C\u4E5F\u5F88\u9AD8\u3002\u4E0D\u8FC7\uFF0C\u57CB\u6CA1\u5C31\u57CB\u6CA1\u5427\u3002</p><p>\u5B9A\u4E2A\u5C0F\u76EE\u6807\u5427\uFF1A2022 \u5E74\uFF0C\u77E5\u4E4E\u9605\u8BFB\u7834 5000 \u4E07\u9605\u8BFB\uFF08\u597D\u50CF\u6CE8\u5B9A\u5B8C\u4E0D\u6210\uFF09\u3002</p><p>\u8FD9\u4E2A flag 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+import{_ as p}from"./plugin-vue_export-helper.21dcd24c.js";import{o as e,c as t,e as a}from"./app.615e41d8.js";const r={},c=a('<h1 id="\u6211\u7684\u7B2C\u4E00\u4E2A-\u4E00\u5343\u4E07-\u77E5\u4E4E\u9605\u8BFB" tabindex="-1"><a class="header-anchor" href="#\u6211\u7684\u7B2C\u4E00\u4E2A-\u4E00\u5343\u4E07-\u77E5\u4E4E\u9605\u8BFB" aria-hidden="true">#</a> \u6211\u7684\u7B2C\u4E00\u4E2A\uFF0C\u4E00\u5343\u4E07\uFF01\u77E5\u4E4E\u9605\u8BFB</h1><p>\u5927\u5BB6\u597D\uFF0C\u6211\u662F\u4E8C\u54E5\u5440\uFF01</p><p>\u524D\u51E0\u5929\uFF0C\u5077\u5077\u6478\u6478\u8FC7\u4E86\u81EA\u5DF1\u7684\u7B2C N \u4E2A 18 \u5C81\uFF0C\u672C\u6765\u4E0D\u60F3\u8FC7\u751F\u65E5\u7684\uFF0C\u5C31\u60F3\u5F53\u505A\u662F\u5E73\u5E38\u7684\u4E00\u5929\u3002\u7ED3\u679C\u6211\u59B9\u975E\u8981\u63D0\u9192\u6211\uFF0C\u5927\u5BB6\u4F19\u77A7\u77A7\uFF0C\u8FD9\u50CF\u59B9\u59B9\u8BE5\u8BF4\u7684\u8BDD\u5417\uFF1F</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/zhihu-1000wan-5addb157-141f-400b-a51f-77557c8fdb8d.png" alt=""></p><p>\u545C\u545C\u545C~</p><p>\u6C42\u5B89\u6170\u3002</p><p>\u4E0D\u60F3\u5B89\u6170\u5C31\u60F3\u5077\u7740\u4E50\u662F\u5427\uFF1F\u90A3\u6211\u81EA\u5DF1\u5B89\u6170\u4E0B\u81EA\u5DF1\u5427\u3002</p><p><strong>\u7ECF\u8425\u4E86\u8FD1\u4E00\u5E74\u7684\u77E5\u4E4E\uFF0C\u9605\u8BFB\u603B\u6570\u7A81\u7834\u4E86\u4E00\u5343\u4E07\uFF0C\u8FD9\u4E5F\u662F\u6211\u4EBA\u751F\u5F53\u4E2D\u7684\u7B2C\u4E00\u4E2A</strong>\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/zhihu-1000wan-0324afde-4009-4e80-b878-2311ff88e5ca.png" alt=""></p><p>\u5176\u5B9E\u65E9\u5728 11 \u6708\u5C31\u7834\u4E86\u5343\u4E07\uFF0C\u5F53\u65F6\u5C31\u60F3\u8BB0\u5F55\u4E00\u4E0B\uFF0C\u4F46\u7EC6\u60F3\u4E00\u4E0B\uFF0C\u597D\u50CF\u8FD9\u70B9\u6210\u7EE9\u4E5F\u7B97\u4E0D\u4E0A\u4EC0\u4E48\u3002\u6BD5\u7ADF\u903C\u4E4E\u4E0A\u4EBA\u5747 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src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/zhihu-1000wan-2fdd5b2b-67c5-40cf-b0e4-0a92a37e659a.png" alt=""></p><p>\u8FD9\u8DB3\u4EE5\u8BF4\u660E\u8FD9\u4E2A\u5E16\u5B50\u7684\u5185\u5BB9\u662F\u8DB3\u591F\u786C\u6838\u7684\u3002</p><p>\u5199\u77E5\u4E4E\u8FD9\u8FD1\u4E00\u5E74\u65F6\u95F4\u91CC\uFF0C\u6709\u4E00\u4E2A\u5E16\u5B50\u65E0\u58F0\u65E0\u606F\u5730\u7206\u4E86\uFF1A<strong>60 \u4E07+\u7684\u9605\u8BFB\uFF0C7000+\u8D5E\u540C\uFF0C2.3 \u4E07+\u6B21\u7684\u6536\u85CF</strong>\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/zhihu-1000wan-8b4637f2-08c9-479b-855f-3fd332d44651.png" alt=""></p><p>\u4E0D\u5BF9\u554A\uFF0C\u6536\u85CF\u7ADF\u7136\u662F\u70B9\u8D5E\u7684 3 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src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/zhihu-1000wan-4612a83f-6207-496c-b32b-c6f1ab031c4f.png" alt=""></p><p>\u867D\u7136\u6709\u4E9B\u57CB\u6CA1\u7684\u5E16\u5B50\u6211\u89C9\u5F97\u4EF7\u503C\u4E5F\u5F88\u9AD8\u3002\u4E0D\u8FC7\uFF0C\u57CB\u6CA1\u5C31\u57CB\u6CA1\u5427\u3002</p><p>\u5B9A\u4E2A\u5C0F\u76EE\u6807\u5427\uFF1A2022 \u5E74\uFF0C\u77E5\u4E4E\u9605\u8BFB\u7834 5000 \u4E07\u9605\u8BFB\uFF08\u597D\u50CF\u6CE8\u5B9A\u5B8C\u4E0D\u6210\uFF09\u3002</p><p>\u8FD9\u4E2A flag 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diff --git a/dist/assets/zhihu-jisjkyynxzdtjdyj.html.468f166c.js b/dist/assets/zhihu-jisjkyynxzdtjdyj.html.468f166c.js
new file mode 100644
index 00000000..8e04d77a
--- /dev/null
+++ b/dist/assets/zhihu-jisjkyynxzdtjdyj.html.468f166c.js
@@ -0,0 +1 @@
+import{_ as r}from"./plugin-vue_export-helper.21dcd24c.js";import{r as n,o as s,c as e,a as p,b as g,e as t}from"./app.615e41d8.js";const 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n={},g=s('<p>\u672C\u4EBA20\u5E74\u79CB\u62DB\u65F6\u6295\u7684\u94F6\u884C\u8FD8\u6BD4\u8F83\u591A\uFF0C\u5C31\u662F\u56FE\u7A33\u5B9A\uFF0C\u94B1\u5C11\u4E00\u70B9\u65E0\u6240\u8C13\u3002\u76EE\u524D\u5DF2\u5165\u804C\u67D0\u94F6\u884C\u603B\u884C\u79D1\u6280\u4FE1\u606F\u90E8\u3002</p><p>\u603B\u7ED3\u4E00\u4E0B\u5C31\u662F3\u70B9\uFF1A<strong>\u7A33\u5B9A+\u85AA\u8D44\u8FD8\u884C+\u6CA1\u6709\u8425\u9500\u538B\u529B</strong>\u3002</p><p><strong>\u8BC1\u5238\u516C\u53F8</strong>\u540C\u7406\uFF1A\u897F\u90E8\u8BC1\u5238\uFF0C\u897F\u5357\u8BC1\u5238\uFF0C\u957F\u6C5F\u8BC1\u5238\uFF0C\u534E\u6CF0\u8BC1\u5238\uFF0C\u5E7F\u53D1\u8BC1\u5238\u7B49\u7B49\uFF08\u57FA\u672C<strong>\u6BCF\u7701</strong>\u90FD\u6709\u4E00\u6240\u8BC1\u5238\u516C\u53F8\uFF09</p><p>**\u6E29\u99A8\u63D0\u9192\uFF1A**\u5404\u7701\u7684\u8BC1\u5238\u516C\u53F8IT\u90E8\u95E8\u5F85\u9047\u66F4\u9AD8\u54E6\u3002</p><p><strong>\u5F85\u9047\u4E0A\uFF1A</strong></p><p><strong>1\u3001\u6574\u4F53\u4E0A\u5927\u94F6\u884C\u7684\u5F85\u9047\uFF1E\u4E2D\u5C0F\u94F6\u884C</strong></p><p><strong>2\u3001\u5730\u65B9\u6027\u94F6\u884C\u603B\u884C\u7684\u5F85\u9047\uFF1E\u56FD\u6709\u884C\u7701\u7EA7\u5206\u884C</strong></p><p><strong>\u7A33\u5B9A\u6027\uFF1A</strong></p><p>3\u5BB6\u653F\u7B56\u884C\uFF1E6\u5927\u56FD\u6709\u884C\uFF08\u603B\u884C+\u7701\u7EA7\u5206\u884C+\u5E02\u7EA7\u652F\u884C\uFF09+\u5730\u65B9\u57CE\u5E02\u94F6\u884C\u3001\u5730\u65B9\u519C\u5546\u884C\uFF1E12\u5BB6\u80A1\u4EFD\u5236\u5546\u4E1A\u94F6\u884C+\u79D1\u6280\u5B50\u516C\u53F8</p><h3 id="\u4E00\u3001\u94F6\u884C\u5206\u7C7B" tabindex="-1"><a class="header-anchor" href="#\u4E00\u3001\u94F6\u884C\u5206\u7C7B" aria-hidden="true">#</a> \u4E00\u3001\u94F6\u884C\u5206\u7C7B</h3><p><strong>\u9996\u5148\u94F6\u884C\u4E3B\u8981\u5206\u4E3A\u5982\u4E0B5\u7C7B</strong>\uFF1A</p><p><strong>3\u5BB6</strong>\u653F\u7B56\u6027\u94F6\u884C\uFF08\u56FD\u5BB6\u5F00\u53D1\u94F6\u884C\u3001\u8FDB\u51FA\u53E3\u94F6\u884C\u3001\u519C\u4E1A\u53D1\u5C55\u94F6\u884C\uFF09\uFF0C\u603B\u884C+\u5404\u7701\u7684\u7701\u7EA7\u5206\u884C</p><p><strong>6\u5BB6</strong>\u4E2D\u592E\u7BA1\u8F96\u7684\u56FD\u6709\u884C\uFF08\u4E2D\u519C\u5DE5\u5EFA\u4EA4+\u90AE\u50A8\uFF09\uFF0C\u7ED3\u6784\u4E3A\uFF1A\u603B\u884C+\u5404\u7701\u7684\u7701\u7EA7\u5206\u884C</p><p><strong>12\u5BB6</strong>\u5168\u56FD\u6027\u80A1\u4EFD\u5236\u5546\u4E1A\u94F6\u884C(\u4E2D\u4FE1\u3001\u534E\u590F\u3001\u62DB\u5546\u3001\u6DF1\u53D1\u3001\u5149\u5927\u3001\u6C11\u751F\u3001\u6D66\u53D1\u3001\u6E24\u6D77\u3001\u5E7F\u53D1\u3001\u5174\u4E1A\u3001\u6052\u4E30\u3001\u6D59\u5546\uFF09\uFF0C\u7ED3\u6784\u4E3A\uFF1A\u603B\u884C+\u5404\u7701\u7684\u7701\u7EA7\u5206\u884C</p><p><strong>\u5DF2\u5B8C\u6210\u80A1\u4EFD\u5236\u6539\u5236</strong>\u7684\u5404\u7701<strong>\u5730\u65B9\u6027</strong>\u57CE\u5E02\u94F6\u884C+\u519C\u6751\u5546\u4E1A\u94F6\u884C\u3002</p><blockquote><p><strong>144\u5BB6\u57CE\u5E02\u5546\u4E1A\u94F6\u884C</strong>\uFF08\u5357\u4EAC\u94F6\u884C\u3001\u676D\u5DDE\u94F6\u884C\u3001\u5B81\u6CE2\u94F6\u884C\u3001\u91CD\u5E86\u94F6\u884C\u3001\u4E2D\u539F\u94F6\u884C\u3001\u5317\u4EAC\u94F6\u884C\u3001\u4E0A\u6D77\u94F6\u884C\uFF0C\u56DB\u5DDD\u94F6\u884C\u7B49\u7B49\uFF09\uFF0C</p><p><strong>212\u5BB6\u519C\u6751\u5546\u4E1A\u94F6\u884C</strong>\uFF08\u5317\u4EAC\u519C\u5546\u94F6\u884C\u3001\u91CD\u5E86\u519C\u6751\u5546\u4E1A\u94F6\u884C\u3001\u6DF1\u5733\u519C\u6751\u5546\u4E1A\u94F6\u884C\u3001\u5E7F\u5DDE\u519C\u6751\u5546\u4E1A\u94F6\u884C\u3001\u4E0A\u6D77\u519C\u5546\u94F6\u884C\u7B49\u7B49\uFF09\uFF0C<strong>\u7ECF\u8425\u8303\u56F4</strong>\u57FA\u672C\u53EA\u5728\u672C\u7701\u3002</p></blockquote><p><strong>25\u5BB6\u672A\u6539\u5236</strong>\u7684<strong>\u7701\u7EA7\u519C\u4FE1\u8054\u793E</strong>\uFF08\u8D35\u5DDE\u7701\u519C\u6751\u4FE1\u7528\u793E\u3001\u6CB3\u5317\u7701\u519C\u6751\u4FE1\u7528\u793E\u8054\u5408\u793E\uFF0C\u8FBD\u5B81\u7701\u519C\u6751\u4FE1\u7528\u793E\u8054\u5408\u793E\u7B49\uFF09\uFF0C<strong>\u7ECF\u8425\u8303\u56F4</strong>\u53EA\u5728\u672C\u7701\u3002</p><h3 id="\u4E8C\u3001\u6839\u636E\u5C42\u7EA7\u5206\u7C7B" tabindex="-1"><a class="header-anchor" href="#\u4E8C\u3001\u6839\u636E\u5C42\u7EA7\u5206\u7C7B" aria-hidden="true">#</a> \u4E8C\u3001\u6839\u636E\u5C42\u7EA7\u5206\u7C7B</h3><p><strong>\u94F6\u884C\u79D1\u6280\u4FE1\u606F\u5C97\u5206\u4E3A\u4EE5\u4E0B\u51E0\u7C7B</strong>\uFF1A</p><p>\u6574\u4F53\u4E0A\uFF0C\u603B\u884C\u4E0B\u5C5E<strong>\u79D1\u6280\u4FE1\u606F\u90E8</strong>&gt;\u603B\u884C\u4E0B\u5C5E<strong>\u7814\u53D1\u4E2D\u5FC3</strong>&gt;=<strong>\u7701\u7EA7\u5206\u884C</strong>&gt;=<strong>\u7701\u4F1A\u57CE\u5E02\u652F\u884C</strong>&gt;=<strong>\u79D1\u6280\u5B50\u516C\u53F8</strong>&gt;\u5176\u4ED6\u5730\u7EA7\u5E02\u652F\u884C\u3002</p><p>\u8FD8\u6709\u4E9B\u4FE1\u7528\u5361\u4E2D\u5FC3\uFF0C\u6570\u636E\u4E2D\u5FC3\u6211\u4E0D\u4E86\u89E3\u5C31\u4E0D\u8BF4\u4E86\u3002</p><p>1\u3001<strong>\u603B\u884C\u4E0B\u5C5E\u7684\u79D1\u6280\u4FE1\u606F\u90E8</strong>\u3002\u5F88\u5C11\u5199\u4EE3\u7801\uFF0C\u4E3B\u8981\u662F\u505A\u6280\u672F\u89C4\u5212\uFF0C\u505A\u7BA1\u7406\uFF08\u7BA1\u7406\u5916\u5305\uFF09\u548C\u8FD0\u7EF4\uFF0C\u6240\u4EE5\u62DB\u4EBA\u6BD4\u7814\u53D1\u4E2D\u5FC3\u5C11\u3002</p><blockquote><p>**\u62DB\u8058\u8981\u6C42\uFF1A**\u4E00\u822C211\u7855\u58EB\u8D77\u6B65\uFF0C\u5B66\u5386\u8981\u6C42\u6700\u9AD8\u3002</p><p><strong>\u7A33\u5B9A\u4E0E\u5F85\u9047</strong>\uFF1A\u7A33\u5B9A\uFF0C\u62FF\u603B\u884C\u5E73\u5747\u7EE9\u6548\uFF0C\u5F85\u9047\u4E0D\u5DEE\uFF0C\u770B\u94F6\u884C\u76C8\u5229\u6C34\u5E73\uFF0C\u6BCF\u4E2A\u94F6\u884C\u5DEE\u5F02\u8F83\u5927\uFF0C\u5165\u804C\u7A0E\u524D15-28\u4E07\u4E4B\u95F4\uFF0C\u540E\u7EED30\u4E07+\u3002\u57FA\u672C\u4E0D\u52A0\u73ED\uFF0C\u671D\u4E5D\u665A\u4E94\u3002</p></blockquote><p>2\u3001<strong>\u603B\u884C\u90E8\u95E8\u4E0B\u5C5E\u7684\u8F6F\u4EF6\u7814\u53D1\u4E2D\u5FC3</strong>\u3002<strong>\u4E13\u804C\u5199\u4EE3\u7801</strong>\uFF0C\u62DB\u4EBA\u6BD4\u8F83\u591A\u7684\uFF1A\u5DE5\u884C\u7814\u53D1\u4E2D\u5FC3\uFF08\u897F\u5B89\u6210\u90FD\u73E0\u6D77\u5E7F\u5DDE\u676D\u5DDE\u5317\u4EAC\uFF09\uFF0C\u4E2D\u884C\u7814\u53D1\u4E2D\u5FC3\uFF08\u897F\u5B89\u5408\u80A5\uFF09\uFF0C\u519C\u4E1A\u94F6\u884C\u7814\u53D1\u4E2D\u5FC3\uFF08\u5929\u6D25\u5317\u4EAC\u6210\u90FD\uFF09\u3002</p><blockquote><p><strong>\u62DB\u8058\u8981\u6C42</strong>\uFF1A\u4E00\u822C211\u7855\u58EB\u8D77\u6B65\uFF0C211&amp;985\u672C\u79D1\u4E5F\u53EF\u4EE5\uFF0C\u672C\u79D1\u8FDB\u53BB\u6027\u4EF7\u6BD4\u9AD8\uFF0C\u5B66\u6821\u597D\uFF0C\u57FA\u672C\u4E0A\u53BB\u4E86\u5C31\u8981\u3002</p><p><strong>\u7A33\u5B9A\u4E0E\u5F85\u9047</strong>\uFF1A\u7A33\u5B9A\uFF0C\u4F46\u662F\u5F85\u9047\u4E0D\u592A\u9AD8\uFF0C\u8F6C\u6B63\u540E\u5927\u6982\u7A0E\u524D15\u4E07-25\u4E07\uFF0C\u6839\u636E\u804C\u79F0\u6DA8\u85AA\u8D44\u3002\u8981\u52A0\u73ED\uFF0C\u52A0\u73ED\u591A\u5C11\u770B\u90E8\u95E8\u3002</p></blockquote><p>3\u3001<strong>\u5168\u56FD\u6027\u94F6\u884C\u7701\u5206\u884C\u7684\u79D1\u6280\u5C97</strong>\u3002\u5168\u56FD\u6027\u94F6\u884C\u5728\u6BCF\u4E2A\u7701\u90FD\u6709\u7701\u5206\u884C\uFF0C<strong>\u591A\u6570\u8981\u5199\u4EE3\u7801</strong>\u3002</p><blockquote><p>**\u62DB\u8058\u8981\u6C42\uFF1A**\u7855\u58EB\u8D77\u6B65\uFF0C\u6216\u8005211\u672C\u79D1\u8D77\u6B65\uFF0C\u6BCF\u4E2A\u7701\u53EF\u80FD\u4E0D\u4E00\u6837\u3002</p><p>**\u7A33\u5B9A\u4E0E\u5F85\u9047\uFF1A**\u7A33\u5B9A\uFF0C\u85AA\u8D44\u5927\u6982\u62FF\u7701\u5206\u884C\u5E73\u5747\u5DE5\u8D44\uFF0C<strong>\u5F85\u9047\u770B\u5F53\u5730\u7684\u7ECF\u6D4E\u60C5\u51B5\uFF08\u6548\u76CA\uFF09</strong>\uFF0C\u4E00\u822C12-20\u4E07\u3002\u5E7F\u5DDE\u548C\u6DF1\u5733\uFF0C\u8F6C\u6B63\u540E\u5C3120\u591A\u4E07\uFF0C\u5E72\u4E09\u5E74\uFF0C\u804C\u7EA7\u4E0A\u53BB\u4E86\uFF0C\u4E00\u5E74\u603B\u5305\u5E94\u8BE5\u4E5F\u662F30\u4E07\u5DE6\u53F3\u5427\u3002\u52A0\u73ED\u770B\u5177\u4F53\u60C5\u51B5\u3002</p></blockquote><p>4\u3001<strong>\u7701\u4F1A\u57CE\u5E02\u652F\u884C</strong>\u7684\u79D1\u6280\u4FE1\u606F\u5C97\u4F4D\u3002\u7701\u5206\u884C\u4E0B\u5C5E\u7BA1\u7406\u5404\u4E2A\u5730\u7EA7\u5E02\u652F\u884C\uFF0C\u5730\u7EA7\u5E02\u91CC\u5F53\u7136<strong>\u7701\u4F1A\u57CE\u5E02</strong>\u5F85\u9047\u6700\u597D\u3002<strong>\u4E00\u822C\u4E0D\u5199\u4EE3\u7801</strong>\u3002</p><blockquote><p>\u62DB\u8058\u8981\u6C42\uFF1A\u672C\u79D1\u8D77\u6B65\uFF0C\u7701\u4F1A\u57CE\u5E02\u7ADE\u4E89\u6700\u5927\u3002</p><p><strong>\u7A33\u5B9A\u4E0E\u5F85\u9047</strong>\uFF1A\u7A33\u5B9A\uFF0C\u85AA\u8D44\u5927\u698212\u4E07-20\u4E07\u3002\u5F85\u9047\u770B\u5F53\u5730\u7684<strong>\u76C8\u5229</strong>\u60C5\u51B5\u3002<strong>\u7701\u4F1A\u652F\u884C\u5F85\u9047\u53EF\u80FD\u9AD8\u4E8E\u7701\u5206\u884C</strong>\u3002\u6BD4\u5982<strong>\u676D\u5DDE\u652F\u884C</strong>\u5F85\u9047\u53EF\u80FD\u9AD8\u4E8E<strong>\u6D59\u6C5F\u7701\u5206\u884C</strong>\u5F85\u9047\u3002</p></blockquote><p>5\u3001<strong>\u603B\u884C\u4E0B\u5C5E\u7684\u79D1\u6280\u5B50\u516C\u53F8</strong>\u3002\u94F6\u884C\u5185\u90E8\u7684\u5916\u5305\u516C\u53F8\u3002\u6BD4\u5982\u62DB\u94F6\u7F51\u7EDC\u79D1\u6280\uFF0C\u5EFA\u4FE1\u91D1\u878D\u79D1\u6280\uFF0C\u4E2D\u94F6\u91D1\u79D1\uFF0C\u6D59\u5546\u94F6\u884C\u7684\u5B50\u516C\u53F8\u201C\u6613\u4F01\u94F6\u201D\uFF0C\u5174\u4E1A\u6570\u91D1\uFF0C\u4E13\u804C\u5199\u4EE3\u7801\u3002</p><blockquote><p><strong>\u62DB\u8058\u8981\u6C42</strong>\uFF1A\u672C\u79D1\u8D77\u6B65\u3002</p><p><strong>\u7A33\u5B9A\u4E0E\u5F85\u9047</strong>\uFF1A\u7A33\u5B9A\u6027\u80AF\u5B9A\u662F\u4E0B\u964D\u4E86\uFF0C\u4F46\u662F\u5F85\u9047\u4E0A\u53BB\u4E86\uFF0C\u8F6C\u6B63\u540E\u4E00\u822C\u7A0E\u524D20-28\u4E07\u3002\u52A0\u73ED\u4F1A\u6BD4\u8F83\u591A\u3002\u4F18\u70B9\uFF1A<strong>\u85AA\u916C\u8F83\u9AD8\uFF0820-30\u4E07\uFF09\uFF0C\u62DB\u8058\u91CF\u5927</strong>\u3002\u7F3A\u70B9\uFF1A<strong>\u7A33\u5B9A\u6027\u5DEE\uFF0C\u65E0\u884C\u5458\u7F16\u5236\uFF0C\u52A0\u73ED\u591A\uFF0C\u6280\u672F\u4E00\u822C</strong>\u3002</p></blockquote><p>6\u3001<strong>\u975E\u7701\u4F1A\u5730\u7EA7\u5E02\u5206\u652F\u884C\u7684\u79D1\u6280\u5C97</strong>\u3002\u975E\u7701\u4F1A\u5730\u7EA7\u5E02&amp;\u533A\u53BF\u7684\u79D1\u6280\u5C97\uFF0C<strong>\u4E0D\u5199\u4EE3\u7801</strong>\uFF0C\u5E72\u8FD0\u7EF4\u63D0\u9700\u6C42\u8FD9\u4E9B\u3002</p><blockquote><p><strong>\u62DB\u8058\u8981\u6C42</strong>\uFF1A\u672C\u79D1\u3002</p><p>**\u7A33\u5B9A\u4E0E\u5F85\u9047\uFF1A**\u7A33\u5B9A\uFF0C\u5F85\u9047\u6BD4\u8F83\u4E00\u822C\u4E86\uFF0C\u7A0E\u524D10\u4E07\u5DE6\u53F3\u5427\uFF0C\u770B\u5F53\u5730\u5206\u884C\u7684\u6548\u76CA\u62FF\u5E73\u5747\u7EE9\u6548\uFF0C\u4E00\u822C\u5728\u5F53\u5730\u8FD8\u662F\u4E2D\u4E0A\u6C34\u5E73\u3002</p></blockquote><p>**\u6C42\u804C\u63A8\u8350\uFF1A**3\u5BB6\u653F\u7B56\u6027\u94F6\u884C\u603B\u90E8\uFF08\u56FD\u5F00\u884C\u3001\u519C\u53D1\u884C\u3001\u8FDB\u51FA\u53E3\u94F6\u884C\uFF09\uFF0C\u6700\u7A33\u5B9A\u3002</p><p>\u519C\u4E1A\u94F6\u884C\uFF0C\u90AE\u50A8\u94F6\u884C\uFF08\u4E0D\u662F\u5B50\u516C\u53F8\u540C\u65F6\u5F85\u9047\u53C8\u9AD8\uFF09\uFF0C\u6E24\u6D77\u94F6\u884C\uFF08\u5929\u6D25\u6709\u989D\u5916**20%**\u8865\u5145\u516C\u79EF\u91D1\uFF09</p><p>\u676D\u5DDE\u94F6\u884C\uFF0C\u5B81\u6CE2\u94F6\u884C\uFF0C\u56DB\u5DDD\u94F6\u884C\u3002</p><p>\u6DF1\u5733\u519C\u5546\u884C\uFF0C\u5E7F\u5DDE\u519C\u5546\u884C\uFF0C\u91CD\u5E86\u519C\u5546\u884C\u3002</p><p>\u5DE5\u884C\u5E7F\u4E1C\u7701\u5206\u884C\uFF0C\u5E7F\u5DDE\u652F\u884C\u3001\u6DF1\u5733\u652F\u884C\u3002</p><p><strong>\u4E0D\u540C\u94F6\u884C\u3001\u4E0D\u540C\u5730\u533A\u3001\u4E0D\u540C\u90E8\u95E8\u5DEE\u5F02\u5F88\u5927\u7684\uFF0C\u5177\u4F53\u95EE\u9898\u5177\u4F53\u5206\u6790\uFF0C\u591A\u4E0A\u725B\u5BA2\uFF0C\u591A\u770Boffershow\uFF0C\u8FD8\u6709\u8109\u8109\u3002\u60F3\u5C3D\u529E\u6CD5\u95EE\u5230\u5185\u90E8\u60C5\u51B5\u3002</strong></p>',39),p=[g];function e(c,a){return t(),r("div",null,p)}var u=o(n,[["render",e],["__file","zhihu-weismyrsyxkjgscxyzhdjyxz.html.vue"]]);export{u as default};
diff --git a/dist/assets/zhihu-younxzdjsjzyxsjrdgq.html.c66976c6.js b/dist/assets/zhihu-younxzdjsjzyxsjrdgq.html.c66976c6.js
new file mode 100644
index 00000000..2025bbf3
--- /dev/null
+++ b/dist/assets/zhihu-younxzdjsjzyxsjrdgq.html.c66976c6.js
@@ -0,0 +1 @@
+import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{r as a,o as s,c as p,a as e,b as r,e as o,d as h}from"./app.615e41d8.js";const c={},i=o('<h3 id="\u4E00\u3001\u9996\u9009\u8BC1\u5238\u516C\u53F8" tabindex="-1"><a class="header-anchor" href="#\u4E00\u3001\u9996\u9009\u8BC1\u5238\u516C\u53F8" aria-hidden="true">#</a> \u4E00\u3001\u9996\u9009\u8BC1\u5238\u516C\u53F8</h3><p><strong>\u5404\u7701</strong>\u57FA\u672C\u90FD\u6709\u4E00\u6240\u8BC1\u5238\u516C\u53F8\uFF0C\u6CBF\u6D77\u7701\u4EFD\u96C6\u4E2D\u5728\u7A0E\u524D30-40\u4E07\u5DE6\u53F3\uFF0C\u5185\u5730\u96C6\u4E2D\u572820-30\u4E07\u3002\u5F88\u5C11\u52A0\u73ED\uFF0C\u591A\u6570\u4E3A\u56FD\u4F01\uFF0C\u4E00\u822C\u8981\u6C42\u7855\u58EB\u3002</p><p><img src="https://pic1.zhimg.com/50/v2-d737dbbdd51bc05f8ef164e01a139a11_720w.jpg?source=1940ef5c" alt=""></p><p>\u7136\u540E\u8FD8\u6709\u4E9B\u516C\u52DF\u548C\u79C1\u52DF\u57FA\u91D1\u7684\u6280\u672F\u5C97\uFF0C\u6BD4\u5982\u6613\u65B9\u8FBE\u57FA\u91D1\uFF0C\u534E\u5B89\u57FA\u91D1\u3001\u6C47\u6DFB\u5BCC\u57FA\u91D1\uFF0C\u6BD4\u8F83\u770B\u4E2D\u5B66\u5386\uFF0C\u5F85\u9047\u6BD4\u5238\u5546\u66F4\u9AD8\u3002</p><p>\u6211\u8BA4\u8BC6\u7684\u4E00\u4E2A\u4E2D\u90E8211\u7855\u53BB\u4E86\u4E0A\u6D77***\u8D44\u4EA7\uFF08\u79C1\u52DF\uFF09\uFF0C22k*18=39.6\uFF0C\u5728\u57FA\u91D1\u516C\u53F8\u91CC\u7B97\u662F\u6BD4\u8F83\u4F4E\u7684\u4E86\u3002</p><h3 id="\u4E8C\u3001\u5404\u5927\u94F6\u884C" tabindex="-1"><a class="header-anchor" href="#\u4E8C\u3001\u5404\u5927\u94F6\u884C" aria-hidden="true">#</a> 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-import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as a,c as s,e}from"./app.a0271b9c.js";const t={},p=e(`<h1 id="jvm\u5B57\u8282\u7801\u6307\u4EE4\u8BE6\u89E3" tabindex="-1"><a class="header-anchor" href="#jvm\u5B57\u8282\u7801\u6307\u4EE4\u8BE6\u89E3" aria-hidden="true">#</a> JVM\u5B57\u8282\u7801\u6307\u4EE4\u8BE6\u89E3</h1><p>\u5927\u5BB6\u597D\uFF0C\u6211\u662F\u4E8C\u54E5\u5440\u3002Java \u5B57\u8282\u7801\u6307\u4EE4\u662F JVM \u4F53\u7CFB\u4E2D\u975E\u5E38\u96BE\u5543\u7684\u4E00\u5757\u786C\u9AA8\u5934\uFF0C\u6211\u4F30\u8BA1\u6709\u4E9B\u8BFB\u8005\u4F1A\u6709\u8FD9\u6837\u7684\u7591\u60D1\uFF0C\u201CJava \u5B57\u8282\u7801\u96BE\u5B66\u5417\uFF1F\u6211\u80FD\u4E0D\u80FD\u5B66\u4F1A\u554A\uFF1F\u201D</p><p>\u8BB2\u826F\u5FC3\u8BDD\uFF0C\u4E0D\u662F\u6211\u8C26\u865A\uFF0C\u4E00\u5F00\u59CB\u5B66 Java \u5B57\u8282\u7801\u548C Java \u865A\u62DF\u673A\u65B9\u9762\u7684\u77E5\u8BC6\u6211\u4E5F\u611F\u89C9\u5934\u5927\uFF01\u4F46\u786C\u7740\u5934\u76AE\u5B66\u4E86\u4E00\u9635\u5B50\u4E4B\u540E\uFF0C\u7A81\u7136\u5C31\u5F00\u7A8D\u4E86\uFF0C\u89C9\u5F97\u597D\u6709\u610F\u601D\uFF0C\u5C24\u5176\u662F\u660E\u767D\u4E86 Java \u4EE3\u7801\u5728\u5E95\u5C42\u7ADF\u7136\u662F\u8FD9\u6837\u6267\u884C\u7684\u65F6\u5019\uFF0C\u611F\u89C9\u65E2\u81A8\u80C0\u53C8\u98D8\u98D8\u7136\uFF0C\u6D51\u8EAB\u4E0A\u4E0B\u6563\u53D1\u7740\u81EA\u4FE1\u7684\u5149\u8292\uFF01</p><p>Java \u5B98\u65B9\u7684\u865A\u62DF\u673A Hotspot \u662F\u57FA\u4E8E\u6808\u7684\uFF0C\u800C\u4E0D\u662F\u57FA\u4E8E\u5BC4\u5B58\u5668\u7684\u3002</p><p>\u57FA\u4E8E\u6808\u7684\u4F18\u70B9\u662F\u53EF\u79FB\u690D\u6027\u66F4\u597D\u3001\u6307\u4EE4\u66F4\u77ED\u3001\u5B9E\u73B0\u8D77\u6765\u7B80\u5355\uFF0C\u4F46\u4E0D\u80FD\u968F\u673A\u8BBF\u95EE\u6808\u4E2D\u7684\u5143\u7D20\uFF0C\u5B8C\u6210\u76F8\u540C\u529F\u80FD\u6240\u9700\u8981\u7684\u6307\u4EE4\u6570\u4E5F\u6BD4\u5BC4\u5B58\u5668\u7684\u8981\u591A\uFF0C\u9700\u8981\u9891\u7E41\u7684\u5165\u6808\u548C\u51FA\u6808\u3002</p><p>\u57FA\u4E8E\u5BC4\u5B58\u5668\u7684\u4F18\u70B9\u662F\u901F\u5EA6\u5FEB\uFF0C\u6709\u5229\u4E8E\u7A0B\u5E8F\u8FD0\u884C\u901F\u5EA6\u7684\u4F18\u5316\uFF0C\u4F46\u64CD\u4F5C\u6570\u9700\u8981\u663E\u5F0F\u6307\u5B9A\uFF0C\u6307\u4EE4\u4E5F\u6BD4\u8F83\u957F\u3002</p><p>Java \u5B57\u8282\u7801\u7531\u64CD\u4F5C\u7801\u548C\u64CD\u4F5C\u6570\u7EC4\u6210\u3002</p><ul><li>\u64CD\u4F5C\u7801\uFF08Opcode\uFF09\uFF1A\u4E00\u4E2A\u5B57\u8282\u957F\u5EA6\uFF080-255\uFF0C\u610F\u5473\u7740\u6307\u4EE4\u96C6\u7684\u64CD\u4F5C\u7801\u603B\u6570\u4E0D\u53EF\u80FD\u8D85\u8FC7 256 \u6761\uFF09\uFF0C\u4EE3\u8868\u7740\u67D0\u79CD\u7279\u5B9A\u7684\u64CD\u4F5C\u542B\u4E49\u3002</li><li>\u64CD\u4F5C\u6570\uFF08Operands\uFF09\uFF1A\u96F6\u4E2A\u6216\u8005\u591A\u4E2A\uFF0C\u7D27\u8DDF\u5728\u64CD\u4F5C\u7801\u4E4B\u540E\uFF0C\u4EE3\u8868\u6B64\u64CD\u4F5C\u9700\u8981\u7684\u53C2\u6570\u3002</li></ul><p>\u7531\u4E8E Java \u865A\u62DF\u673A\u662F\u57FA\u4E8E\u6808\u800C\u4E0D\u662F\u5BC4\u5B58\u5668\u7684\u7ED3\u6784\uFF0C\u6240\u4EE5\u5927\u591A\u6570\u6307\u4EE4\u90FD\u53EA\u6709\u4E00\u4E2A\u64CD\u4F5C\u7801\u3002\u6BD4\u5982 <code>aload_0</code>\uFF08\u5C06\u5C40\u90E8\u53D8\u91CF\u8868\u4E2D\u4E0B\u6807\u4E3A 0 \u7684\u6570\u636E\u538B\u5165\u64CD\u4F5C\u6570\u6808\u4E2D\uFF09\u5C31\u53EA\u6709\u64CD\u4F5C\u7801\u6CA1\u6709\u64CD\u4F5C\u6570\uFF0C\u800C <code>invokespecial #1</code>\uFF08\u8C03\u7528\u6210\u5458\u65B9\u6CD5\u6216\u8005\u6784\u9020\u65B9\u6CD5\uFF0C\u5E76\u4F20\u9012\u5E38\u91CF\u6C60\u4E2D\u4E0B\u6807\u4E3A 1 \u7684\u5E38\u91CF\uFF09\u5C31\u662F\u7531\u64CD\u4F5C\u7801\u548C\u64CD\u4F5C\u6570\u7EC4\u6210\u7684\u3002</p><h3 id="_01\u3001\u52A0\u8F7D\u4E0E\u5B58\u50A8\u6307\u4EE4" tabindex="-1"><a class="header-anchor" href="#_01\u3001\u52A0\u8F7D\u4E0E\u5B58\u50A8\u6307\u4EE4" aria-hidden="true">#</a> 01\u3001\u52A0\u8F7D\u4E0E\u5B58\u50A8\u6307\u4EE4</h3><p>\u52A0\u8F7D\uFF08load\uFF09\u548C\u5B58\u50A8\uFF08store\uFF09\u76F8\u5173\u7684\u6307\u4EE4\u662F\u4F7F\u7528\u6700\u9891\u7E41\u7684\u6307\u4EE4\uFF0C\u7528\u4E8E\u5C06\u6570\u636E\u4ECE\u6808\u5E27\u7684\u5C40\u90E8\u53D8\u91CF\u8868\u548C\u64CD\u4F5C\u6570\u6808\u4E4B\u95F4\u6765\u56DE\u4F20\u9012\u3002</p><p><strong>1\uFF09\u5C06\u5C40\u90E8\u53D8\u91CF\u8868\u4E2D\u7684\u53D8\u91CF\u538B\u5165\u64CD\u4F5C\u6570\u6808\u4E2D</strong></p><ul><li><code>xload_&lt;n&gt;</code>\uFF08x \u4E3A i\u3001l\u3001f\u3001d\u3001a\uFF0Cn \u9ED8\u8BA4\u4E3A 0 \u5230 3\uFF09\uFF0C\u8868\u793A\u5C06\u7B2C n \u4E2A\u5C40\u90E8\u53D8\u91CF\u538B\u5165\u64CD\u4F5C\u6570\u6808\u4E2D\u3002</li><li>xload\uFF08x \u4E3A i\u3001l\u3001f\u3001d\u3001a\uFF09\uFF0C\u901A\u8FC7\u6307\u5B9A\u53C2\u6570\u7684\u5F62\u5F0F\uFF0C\u5C06\u5C40\u90E8\u53D8\u91CF\u538B\u5165\u64CD\u4F5C\u6570\u6808\u4E2D\uFF0C\u5F53\u4F7F\u7528\u8FD9\u4E2A\u6307\u4EE4\u65F6\uFF0C\u8868\u793A\u5C40\u90E8\u53D8\u91CF\u7684\u6570\u91CF\u53EF\u80FD\u8D85\u8FC7\u4E86 4 \u4E2A</li></ul><p>\u89E3\u91CA\u4E00\u4E0B\u3002</p><p>x \u4E3A\u64CD\u4F5C\u7801\u52A9\u8BB0\u7B26\uFF0C\u8868\u660E\u662F\u54EA\u4E00\u79CD\u6570\u636E\u7C7B\u578B\u3002\u89C1\u4E0B\u8868\u6240\u793A\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/zijiema-zhiling-879da2f2-fb72-48a9-985e-5a28a9fc8814.png" alt=""></p><p>\u50CF arraylength \u6307\u4EE4\uFF0C\u6CA1\u6709\u64CD\u4F5C\u7801\u52A9\u8BB0\u7B26\uFF0C\u5B83\u6CA1\u6709\u4EE3\u8868\u6570\u636E\u7C7B\u578B\u7684\u7279\u6B8A\u5B57\u7B26\uFF0C\u4F46\u64CD\u4F5C\u6570\u53EA\u80FD\u662F\u4E00\u4E2A\u6570\u7EC4\u7C7B\u578B\u7684\u5BF9\u8C61\u3002</p><p>\u5927\u90E8\u5206\u7684\u6307\u4EE4\u90FD\u4E0D\u652F\u6301 byte\u3001short \u548C char\uFF0C\u751A\u81F3\u6CA1\u6709\u4EFB\u4F55\u6307\u4EE4\u652F\u6301 boolean \u7C7B\u578B\u3002\u7F16\u8BD1\u5668\u4F1A\u5C06 byte \u548C short \u7C7B\u578B\u7684\u6570\u636E\u5E26\u7B26\u53F7\u6269\u5C55\uFF08Sign-Extend\uFF09\u4E3A int \u7C7B\u578B\uFF0C\u5C06 boolean \u548C char \u96F6\u4F4D\u6269\u5C55\uFF08Zero-Extend\uFF09\u4E3A int \u7C7B\u578B\u3002</p><p>\u4E3E\u4F8B\u6765\u8BF4\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">private</span> <span class="token keyword">void</span> <span class="token function">load</span><span class="token punctuation">(</span><span class="token keyword">int</span> age<span class="token punctuation">,</span> <span class="token class-name">String</span> name<span class="token punctuation">,</span> <span class="token keyword">long</span> birthday<span class="token punctuation">,</span> <span class="token keyword">boolean</span> sex<span class="token punctuation">)</span> <span class="token punctuation">{</span>
+import{_ as n}from"./plugin-vue_export-helper.21dcd24c.js";import{o as a,c as s,e}from"./app.615e41d8.js";const t={},p=e(`<h1 id="jvm\u5B57\u8282\u7801\u6307\u4EE4\u8BE6\u89E3" tabindex="-1"><a class="header-anchor" href="#jvm\u5B57\u8282\u7801\u6307\u4EE4\u8BE6\u89E3" aria-hidden="true">#</a> JVM\u5B57\u8282\u7801\u6307\u4EE4\u8BE6\u89E3</h1><p>\u5927\u5BB6\u597D\uFF0C\u6211\u662F\u4E8C\u54E5\u5440\u3002Java \u5B57\u8282\u7801\u6307\u4EE4\u662F JVM \u4F53\u7CFB\u4E2D\u975E\u5E38\u96BE\u5543\u7684\u4E00\u5757\u786C\u9AA8\u5934\uFF0C\u6211\u4F30\u8BA1\u6709\u4E9B\u8BFB\u8005\u4F1A\u6709\u8FD9\u6837\u7684\u7591\u60D1\uFF0C\u201CJava \u5B57\u8282\u7801\u96BE\u5B66\u5417\uFF1F\u6211\u80FD\u4E0D\u80FD\u5B66\u4F1A\u554A\uFF1F\u201D</p><p>\u8BB2\u826F\u5FC3\u8BDD\uFF0C\u4E0D\u662F\u6211\u8C26\u865A\uFF0C\u4E00\u5F00\u59CB\u5B66 Java \u5B57\u8282\u7801\u548C Java \u865A\u62DF\u673A\u65B9\u9762\u7684\u77E5\u8BC6\u6211\u4E5F\u611F\u89C9\u5934\u5927\uFF01\u4F46\u786C\u7740\u5934\u76AE\u5B66\u4E86\u4E00\u9635\u5B50\u4E4B\u540E\uFF0C\u7A81\u7136\u5C31\u5F00\u7A8D\u4E86\uFF0C\u89C9\u5F97\u597D\u6709\u610F\u601D\uFF0C\u5C24\u5176\u662F\u660E\u767D\u4E86 Java \u4EE3\u7801\u5728\u5E95\u5C42\u7ADF\u7136\u662F\u8FD9\u6837\u6267\u884C\u7684\u65F6\u5019\uFF0C\u611F\u89C9\u65E2\u81A8\u80C0\u53C8\u98D8\u98D8\u7136\uFF0C\u6D51\u8EAB\u4E0A\u4E0B\u6563\u53D1\u7740\u81EA\u4FE1\u7684\u5149\u8292\uFF01</p><p>Java \u5B98\u65B9\u7684\u865A\u62DF\u673A Hotspot \u662F\u57FA\u4E8E\u6808\u7684\uFF0C\u800C\u4E0D\u662F\u57FA\u4E8E\u5BC4\u5B58\u5668\u7684\u3002</p><p>\u57FA\u4E8E\u6808\u7684\u4F18\u70B9\u662F\u53EF\u79FB\u690D\u6027\u66F4\u597D\u3001\u6307\u4EE4\u66F4\u77ED\u3001\u5B9E\u73B0\u8D77\u6765\u7B80\u5355\uFF0C\u4F46\u4E0D\u80FD\u968F\u673A\u8BBF\u95EE\u6808\u4E2D\u7684\u5143\u7D20\uFF0C\u5B8C\u6210\u76F8\u540C\u529F\u80FD\u6240\u9700\u8981\u7684\u6307\u4EE4\u6570\u4E5F\u6BD4\u5BC4\u5B58\u5668\u7684\u8981\u591A\uFF0C\u9700\u8981\u9891\u7E41\u7684\u5165\u6808\u548C\u51FA\u6808\u3002</p><p>\u57FA\u4E8E\u5BC4\u5B58\u5668\u7684\u4F18\u70B9\u662F\u901F\u5EA6\u5FEB\uFF0C\u6709\u5229\u4E8E\u7A0B\u5E8F\u8FD0\u884C\u901F\u5EA6\u7684\u4F18\u5316\uFF0C\u4F46\u64CD\u4F5C\u6570\u9700\u8981\u663E\u5F0F\u6307\u5B9A\uFF0C\u6307\u4EE4\u4E5F\u6BD4\u8F83\u957F\u3002</p><p>Java \u5B57\u8282\u7801\u7531\u64CD\u4F5C\u7801\u548C\u64CD\u4F5C\u6570\u7EC4\u6210\u3002</p><ul><li>\u64CD\u4F5C\u7801\uFF08Opcode\uFF09\uFF1A\u4E00\u4E2A\u5B57\u8282\u957F\u5EA6\uFF080-255\uFF0C\u610F\u5473\u7740\u6307\u4EE4\u96C6\u7684\u64CD\u4F5C\u7801\u603B\u6570\u4E0D\u53EF\u80FD\u8D85\u8FC7 256 \u6761\uFF09\uFF0C\u4EE3\u8868\u7740\u67D0\u79CD\u7279\u5B9A\u7684\u64CD\u4F5C\u542B\u4E49\u3002</li><li>\u64CD\u4F5C\u6570\uFF08Operands\uFF09\uFF1A\u96F6\u4E2A\u6216\u8005\u591A\u4E2A\uFF0C\u7D27\u8DDF\u5728\u64CD\u4F5C\u7801\u4E4B\u540E\uFF0C\u4EE3\u8868\u6B64\u64CD\u4F5C\u9700\u8981\u7684\u53C2\u6570\u3002</li></ul><p>\u7531\u4E8E Java \u865A\u62DF\u673A\u662F\u57FA\u4E8E\u6808\u800C\u4E0D\u662F\u5BC4\u5B58\u5668\u7684\u7ED3\u6784\uFF0C\u6240\u4EE5\u5927\u591A\u6570\u6307\u4EE4\u90FD\u53EA\u6709\u4E00\u4E2A\u64CD\u4F5C\u7801\u3002\u6BD4\u5982 <code>aload_0</code>\uFF08\u5C06\u5C40\u90E8\u53D8\u91CF\u8868\u4E2D\u4E0B\u6807\u4E3A 0 \u7684\u6570\u636E\u538B\u5165\u64CD\u4F5C\u6570\u6808\u4E2D\uFF09\u5C31\u53EA\u6709\u64CD\u4F5C\u7801\u6CA1\u6709\u64CD\u4F5C\u6570\uFF0C\u800C <code>invokespecial #1</code>\uFF08\u8C03\u7528\u6210\u5458\u65B9\u6CD5\u6216\u8005\u6784\u9020\u65B9\u6CD5\uFF0C\u5E76\u4F20\u9012\u5E38\u91CF\u6C60\u4E2D\u4E0B\u6807\u4E3A 1 \u7684\u5E38\u91CF\uFF09\u5C31\u662F\u7531\u64CD\u4F5C\u7801\u548C\u64CD\u4F5C\u6570\u7EC4\u6210\u7684\u3002</p><h3 id="_01\u3001\u52A0\u8F7D\u4E0E\u5B58\u50A8\u6307\u4EE4" tabindex="-1"><a class="header-anchor" href="#_01\u3001\u52A0\u8F7D\u4E0E\u5B58\u50A8\u6307\u4EE4" aria-hidden="true">#</a> 01\u3001\u52A0\u8F7D\u4E0E\u5B58\u50A8\u6307\u4EE4</h3><p>\u52A0\u8F7D\uFF08load\uFF09\u548C\u5B58\u50A8\uFF08store\uFF09\u76F8\u5173\u7684\u6307\u4EE4\u662F\u4F7F\u7528\u6700\u9891\u7E41\u7684\u6307\u4EE4\uFF0C\u7528\u4E8E\u5C06\u6570\u636E\u4ECE\u6808\u5E27\u7684\u5C40\u90E8\u53D8\u91CF\u8868\u548C\u64CD\u4F5C\u6570\u6808\u4E4B\u95F4\u6765\u56DE\u4F20\u9012\u3002</p><p><strong>1\uFF09\u5C06\u5C40\u90E8\u53D8\u91CF\u8868\u4E2D\u7684\u53D8\u91CF\u538B\u5165\u64CD\u4F5C\u6570\u6808\u4E2D</strong></p><ul><li><code>xload_&lt;n&gt;</code>\uFF08x \u4E3A i\u3001l\u3001f\u3001d\u3001a\uFF0Cn \u9ED8\u8BA4\u4E3A 0 \u5230 3\uFF09\uFF0C\u8868\u793A\u5C06\u7B2C n \u4E2A\u5C40\u90E8\u53D8\u91CF\u538B\u5165\u64CD\u4F5C\u6570\u6808\u4E2D\u3002</li><li>xload\uFF08x \u4E3A i\u3001l\u3001f\u3001d\u3001a\uFF09\uFF0C\u901A\u8FC7\u6307\u5B9A\u53C2\u6570\u7684\u5F62\u5F0F\uFF0C\u5C06\u5C40\u90E8\u53D8\u91CF\u538B\u5165\u64CD\u4F5C\u6570\u6808\u4E2D\uFF0C\u5F53\u4F7F\u7528\u8FD9\u4E2A\u6307\u4EE4\u65F6\uFF0C\u8868\u793A\u5C40\u90E8\u53D8\u91CF\u7684\u6570\u91CF\u53EF\u80FD\u8D85\u8FC7\u4E86 4 \u4E2A</li></ul><p>\u89E3\u91CA\u4E00\u4E0B\u3002</p><p>x \u4E3A\u64CD\u4F5C\u7801\u52A9\u8BB0\u7B26\uFF0C\u8868\u660E\u662F\u54EA\u4E00\u79CD\u6570\u636E\u7C7B\u578B\u3002\u89C1\u4E0B\u8868\u6240\u793A\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/zijiema-zhiling-879da2f2-fb72-48a9-985e-5a28a9fc8814.png" alt=""></p><p>\u50CF arraylength \u6307\u4EE4\uFF0C\u6CA1\u6709\u64CD\u4F5C\u7801\u52A9\u8BB0\u7B26\uFF0C\u5B83\u6CA1\u6709\u4EE3\u8868\u6570\u636E\u7C7B\u578B\u7684\u7279\u6B8A\u5B57\u7B26\uFF0C\u4F46\u64CD\u4F5C\u6570\u53EA\u80FD\u662F\u4E00\u4E2A\u6570\u7EC4\u7C7B\u578B\u7684\u5BF9\u8C61\u3002</p><p>\u5927\u90E8\u5206\u7684\u6307\u4EE4\u90FD\u4E0D\u652F\u6301 byte\u3001short \u548C char\uFF0C\u751A\u81F3\u6CA1\u6709\u4EFB\u4F55\u6307\u4EE4\u652F\u6301 boolean \u7C7B\u578B\u3002\u7F16\u8BD1\u5668\u4F1A\u5C06 byte \u548C short \u7C7B\u578B\u7684\u6570\u636E\u5E26\u7B26\u53F7\u6269\u5C55\uFF08Sign-Extend\uFF09\u4E3A int \u7C7B\u578B\uFF0C\u5C06 boolean \u548C char \u96F6\u4F4D\u6269\u5C55\uFF08Zero-Extend\uFF09\u4E3A int \u7C7B\u578B\u3002</p><p>\u4E3E\u4F8B\u6765\u8BF4\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">private</span> <span class="token keyword">void</span> <span class="token function">load</span><span class="token punctuation">(</span><span class="token keyword">int</span> age<span class="token punctuation">,</span> <span class="token class-name">String</span> name<span class="token punctuation">,</span> <span class="token keyword">long</span> birthday<span class="token punctuation">,</span> <span class="token keyword">boolean</span> sex<span class="token punctuation">)</span> <span class="token punctuation">{</span>
     <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span>age <span class="token operator">+</span> name <span class="token operator">+</span> birthday <span class="token operator">+</span> sex<span class="token punctuation">)</span><span class="token punctuation">;</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>\u901A\u8FC7 jclasslib \u770B\u4E00\u4E0B <code>load()</code> \u65B9\u6CD5\uFF084 \u4E2A\u53C2\u6570\uFF09\u7684\u5B57\u8282\u7801\u6307\u4EE4\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/zijiema-zhiling-05bfae95-2a33-402c-9041-570093729c42.png" alt=""></p><ul><li>iload_1\uFF1A\u5C06\u5C40\u90E8\u53D8\u91CF\u8868\u4E2D\u4E0B\u6807\u4E3A 1 \u7684 int \u53D8\u91CF\u538B\u5165\u64CD\u4F5C\u6570\u6808\u4E2D\u3002</li><li>aload_2\uFF1A\u5C06\u5C40\u90E8\u53D8\u91CF\u8868\u4E2D\u4E0B\u6807\u4E3A 2 \u7684\u5F15\u7528\u6570\u636E\u7C7B\u578B\u53D8\u91CF\uFF08\u6B64\u65F6\u4E3A String\uFF09\u538B\u5165\u64CD\u4F5C\u6570\u6808\u4E2D\u3002</li><li>lload_3\uFF1A\u5C06\u5C40\u90E8\u53D8\u91CF\u8868\u4E2D\u4E0B\u6807\u4E3A 3 \u7684 long \u578B\u53D8\u91CF\u538B\u5165\u64CD\u4F5C\u6570\u6808\u4E2D\u3002</li><li>iload 5\uFF1A\u5C06\u5C40\u90E8\u53D8\u91CF\u8868\u4E2D\u4E0B\u6807\u4E3A 5 \u7684 int \u53D8\u91CF\uFF08\u5B9E\u9645\u4E3A boolean\uFF09\u538B\u5165\u64CD\u4F5C\u6570\u6808\u4E2D\u3002</li></ul><p>\u901A\u8FC7\u67E5\u770B\u5C40\u90E8\u53D8\u91CF\u8868\u5C31\u80FD\u5173\u8054\u4E0A\u4E86\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/zijiema-zhiling-79d74946-ce9e-41d4-b889-bda861f847bc.png" alt=""></p><p><strong>2\uFF09\u5C06\u5E38\u91CF\u6C60\u4E2D\u7684\u5E38\u91CF\u538B\u5165\u64CD\u4F5C\u6570\u6808\u4E2D</strong></p><p>\u6839\u636E\u6570\u636E\u7C7B\u578B\u548C\u5165\u6808\u5185\u5BB9\u7684\u4E0D\u540C\uFF0C\u6B64\u7C7B\u53C8\u53EF\u4EE5\u7EC6\u5206\u4E3A const \u7CFB\u5217\u3001push \u7CFB\u5217\u548C Idc \u6307\u4EE4\u3002</p><p><strong>const \u7CFB\u5217</strong>\uFF0C\u7528\u4E8E\u7279\u6B8A\u7684\u5E38\u91CF\u5165\u6808\uFF0C\u8981\u5165\u6808\u7684\u5E38\u91CF\u9690\u542B\u5728\u6307\u4EE4\u672C\u8EAB\u3002</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/zijiema-zhiling-270c314d-872b-43b0-861f-417eafc046fd.png" alt=""></p><p><strong>push \u7CFB\u5217</strong>\uFF0C\u4E3B\u8981\u5305\u62EC bipush \u548C sipush\uFF0C\u524D\u8005\u63A5\u6536 8 \u4F4D\u6574\u6570\u4F5C\u4E3A\u53C2\u6570\uFF0C\u540E\u8005\u63A5\u6536 16 \u4F4D\u6574\u6570\u3002</p><p><strong>Idc \u6307\u4EE4</strong>\uFF0C\u5F53 const \u548C push \u4E0D\u80FD\u6EE1\u8DB3\u7684\u65F6\u5019\uFF0C\u4E07\u80FD\u7684 Idc \u6307\u4EE4\u5C31\u4E0A\u573A\u4E86\uFF0C\u5B83\u63A5\u6536\u4E00\u4E2A 8 \u4F4D\u7684\u53C2\u6570\uFF0C\u6307\u5411\u5E38\u91CF\u6C60\u4E2D\u7684\u7D22\u5F15\u3002</p><ul><li><code>Idc_w</code>\uFF1A\u63A5\u6536\u4E24\u4E2A 8 \u4F4D\u6570\uFF0C\u7D22\u5F15\u8303\u56F4\u66F4\u5927\u3002</li><li>\u5982\u679C\u53C2\u6570\u662F long \u6216\u8005 double\uFF0C\u4F7F\u7528 <code>Idc2_w</code> \u6307\u4EE4\u3002</li></ul><p>\u4E3E\u4F8B\u6765\u8BF4\u3002</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">pushConstLdc</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
diff --git a/dist/assets/zongjie.html.0af46efc.js b/dist/assets/zongjie.html.1ee2edb6.js
similarity index 99%
rename from dist/assets/zongjie.html.0af46efc.js
rename to dist/assets/zongjie.html.1ee2edb6.js
index 734d60ea..a0032c2e 100644
--- a/dist/assets/zongjie.html.0af46efc.js
+++ b/dist/assets/zongjie.html.1ee2edb6.js
@@ -1,4 +1,4 @@
-import{_ as t}from"./plugin-vue_export-helper.21dcd24c.js";import{r as o,o as s,c as i,a,b as r,e as l,d as e}from"./app.a0271b9c.js";const c={},d=l(`<h1 id="jvm-\u6838\u5FC3\u77E5\u8BC6\u70B9\u603B\u7ED3" tabindex="-1"><a class="header-anchor" href="#jvm-\u6838\u5FC3\u77E5\u8BC6\u70B9\u603B\u7ED3" aria-hidden="true">#</a> JVM \u6838\u5FC3\u77E5\u8BC6\u70B9\u603B\u7ED3</h1><h2 id="\u4E00\u3001\u57FA\u672C\u6982\u5FF5" tabindex="-1"><a class="header-anchor" href="#\u4E00\u3001\u57FA\u672C\u6982\u5FF5" aria-hidden="true">#</a> \u4E00\u3001\u57FA\u672C\u6982\u5FF5</h2><h3 id="_1-1-openjdk" tabindex="-1"><a class="header-anchor" href="#_1-1-openjdk" aria-hidden="true">#</a> 1.1 OpenJDK</h3><p>\u81EA 1996 \u5E74 <code>JDK 1.0</code> \u53D1\u5E03\u4EE5\u6765\uFF0CSun \u516C\u53F8\u5728\u5927\u7248\u672C\u4E0A\u53D1\u884C\u4E86 <code>JDK 1.1</code>\u3001<code>JDK 1.2</code>\u3001<code>JDK 1.3</code>\u3001<code>JDK 1.4</code>\u3001<code>JDK 5</code>\uFF0C<code>JDK 6</code> \uFF0C\u8FD9\u4E9B\u7248\u672C\u7684 JDK \u90FD\u53EF\u4EE5\u7EDF\u79F0\u4E3A SunJDK \u3002\u4E4B\u540E\u5728 2006 \u5E74\u7684 JavaOne \u5927\u4F1A\u4E0A\uFF0CSun \u516C\u53F8\u5BA3\u5E03\u5C06 Java \u5F00\u6E90\uFF0C\u5728\u968F\u540E\u7684\u4E00\u5E74\u591A\u91CC\uFF0C\u5B83\u9646\u7EED\u5C06 JDK \u7684\u5404\u4E2A\u90E8\u5206\u5728 GPL v2\uFF08GNU General Public License\uFF0Cversion 2\uFF09\u534F\u8BAE\u4E0B\u5F00\u6E90\uFF0C\u5E76\u5EFA\u7ACB\u4E86 OpenJDK \u7EC4\u7EC7\u6765\u5BF9\u8FD9\u4E9B\u4EE3\u7801\u8FDB\u884C\u72EC\u7ACB\u7684\u7BA1\u7406\uFF0C\u8FD9\u5C31\u662F OpenJDK \u7684\u6765\u6E90\uFF0C\u6B64\u65F6\u7684 OpenJDK \u62E5\u6709\u5F53\u65F6 sunJDK 7 \u7684\u51E0\u4E4E\u5168\u90E8\u4EE3\u7801\u3002</p><h3 id="_1-2-oraclejdk" tabindex="-1"><a class="header-anchor" href="#_1-2-oraclejdk" aria-hidden="true">#</a> 1.2 OracleJDK</h3><p>\u5728 JDK 7 \u7684\u5F00\u53D1\u671F\u95F4\uFF0C\u7531\u4E8E\u5404\u79CD\u539F\u56E0\u7684\u5F71\u54CD Sun \u516C\u53F8\u5E02\u503C\u4E00\u8DEF\u4E0B\u8DCC\uFF0C\u5DF2\u65E0\u529B\u63A8\u8FDB JDK 7 \u7684\u5F00\u53D1\uFF0CJDK 7 \u7684\u53D1\u5E03\u4E00\u76F4\u88AB\u63A8\u8FDF\u3002\u4E4B\u540E\u5728 2009 \u5E74 Sun \u516C\u53F8\u88AB Oracle \u516C\u53F8\u6240\u6536\u8D2D\uFF0C\u4E3A\u89E3\u51B3 JDK 7 \u957F\u671F\u8DF3\u7968\u7684\u95EE\u9898\uFF0COracle \u5C06 JDK 7 \u4E2D\u5927\u90E8\u5206\u672A\u80FD\u5B8C\u6210\u7684\u9879\u76EE\u63A8\u8FDF\u5230 JDK 8 \uFF0C\u5E76\u4E8E 2011 \u5E74\u53D1\u5E03\u4E86JDK 7\uFF0C\u5728\u8FD9\u4E4B\u540E\u7531 Oracle \u516C\u53F8\u6B63\u5E38\u53D1\u884C\u7684 JDK \u7248\u672C\u5C31\u7531 SunJDK \u6539\u79F0\u4E3A Oracle JDK\u3002</p><p>\u5728 2017 \u5E74 JDK 9 \u53D1\u5E03\u540E\uFF0COracle \u516C\u53F8\u5BA3\u5E03\u4ECE\u6B64\u4EE5\u540E JDK \u5C06\u4F1A\u5728\u6BCF\u5E74\u7684 3 \u6708\u548C 9 \u6708\u5404\u53D1\u5E03\u4E00\u4E2A\u5927\u7248\u672C\uFF0C\u5373\u534A\u5E74\u53D1\u884C\u4E00\u4E2A\u5927\u7248\u672C\uFF0C\u76EE\u7684\u662F\u4E3A\u4E86\u907F\u514D\u4F17\u591A\u529F\u80FD\u88AB\u6346\u7ED1\u5230\u4E00\u4E2A JDK \u7248\u672C\u4E0A\u800C\u5F15\u53D1\u7684\u65E0\u6CD5\u4EA4\u4ED8\u7684\u98CE\u9669\u3002</p><p>\u5728 JDK 11 \u53D1\u5E03\u540E\uFF0COracle \u540C\u6B65\u8C03\u6574\u4E86 JDK \u7684\u5546\u4E1A\u6388\u6743\uFF0C\u5BA3\u5E03\u4ECE JDK 11 \u8D77\u5C06\u4EE5\u524D\u7684\u5546\u4E1A\u7279\u6027\u5168\u90E8\u5F00\u6E90\u7ED9 OpenJDK \uFF0C\u8FD9\u6837 OpenJDK 11 \u548C OracleJDK 11 \u7684\u4EE3\u7801\u548C\u529F\u80FD\uFF0C\u5728\u672C\u8D28\u4E0A\u5C31\u5B8C\u5168\u76F8\u540C\u4E86\u3002\u540C\u65F6\u8FD8\u5BA3\u5E03\u4EE5\u540E\u90FD\u4F1A\u53D1\u884C\u4E24\u4E2A\u7248\u672C\u7684 JDK \uFF1A</p><ul><li>\u4E00\u4E2A\u662F\u5728 GPLv2 + CE \u534F\u8BAE\u4E0B\u7531 Oracle \u5F00\u6E90\u7684 OpenJDK\uFF1B</li><li>\u4E00\u4E2A\u662F\u5728 OTN \u534F\u8BAE\u4E0B\u6B63\u5E38\u53D1\u884C\u7684 OracleJDK\u3002</li></ul><p>\u4E24\u8005\u5171\u4EAB\u5927\u90E8\u5206\u6E90\u7801\uFF0C\u5728\u529F\u80FD\u4E0A\u51E0\u4E4E\u4E00\u81F4\u3002\u552F\u4E00\u7684\u533A\u522B\u662F Oracle OpenJDK \u53EF\u4EE5\u5728\u5F00\u53D1\u3001\u6D4B\u8BD5\u6216\u8005\u751F\u4EA7\u73AF\u5883\u4E2D\u4F7F\u7528\uFF0C\u4F46\u53EA\u6709\u534A\u5E74\u7684\u66F4\u65B0\u652F\u6301\uFF1B\u800C OracleJDK \u5BF9\u4E2A\u4EBA\u514D\u8D39\uFF0C\u4F46\u5728\u751F\u4EA7\u73AF\u5883\u4E2D\u5546\u7528\u6536\u8D39\uFF0C\u53EF\u4EE5\u6709\u4E09\u5E74\u65F6\u95F4\u7684\u66F4\u65B0\u652F\u6301\u3002</p><h3 id="_1-3-hotspot-vm" tabindex="-1"><a class="header-anchor" href="#_1-3-hotspot-vm" aria-hidden="true">#</a> 1.3 HotSpot VM</h3><p>\u5B83\u662F Sun/Oracle JDK \u548C OpenJDK \u4E2D\u9ED8\u8BA4\u7684\u865A\u62DF\u673A\uFF0C\u4E5F\u662F\u76EE\u524D\u4F7F\u7528\u6700\u4E3A\u5E7F\u6CDB\u7684\u865A\u62DF\u673A\u3002\u6700\u521D\u7531 Longview Technologies \u516C\u53F8\u8BBE\u8BA1\u53D1\u660E\uFF0C\u8BE5\u516C\u53F8\u5728 1997 \u5E74\u88AB Sun \u516C\u53F8\u6536\u8D2D\uFF0C\u968F\u540E Sun \u516C\u53F8\u5728 2006 \u5E74\u5F00\u6E90 SunJDK \u65F6\u4E5F\u5C06 HotSpot \u865A\u62DF\u673A\u4E00\u5E76\u8FDB\u884C\u4E86\u5F00\u6E90\u3002\u4E4B\u540E Oracle \u6536\u8D2D Sun \u4EE5\u540E\uFF0C\u5EFA\u7ACB\u4E86 HotRockit \u9879\u76EE\uFF0C\u5E76\u5C06\u5176\u6536\u8D2D\u7684\u53E6\u5916\u4E00\u5BB6\u516C\u53F8\uFF08BEA\uFF09\u7684 JRockit \u865A\u62DF\u673A\u4E2D\u7684\u4F18\u79C0\u7279\u6027\u96C6\u6210\u5230 HotSpot \u4E2D\u3002HotSpot \u5728\u8FD9\u4E2A\u8FC7\u7A0B\u91CC\u9762\u79FB\u9664\u6389\u6C38\u4E45\u4EE3\uFF0C\u5E76\u5438\u6536\u4E86 JRockit \u7684 Java Mission Control \u76D1\u63A7\u5DE5\u5177\u7B49\u529F\u80FD\u3002\u5230 JDK 8 \u53D1\u884C\u65F6\uFF0C\u91C7\u7528\u7684\u5C31\u662F\u96C6\u4E24\u8005\u4E4B\u957F\u7684 HotSpot VM \u3002</p><p>\u6211\u4EEC\u53EF\u4EE5\u5728\u81EA\u5DF1\u7684\u7535\u8111\u4E0A\u4F7F\u7528 <code>java -version</code> \u6765\u83B7\u5F97 JDK \u7684\u4FE1\u606F\uFF1A</p><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code>C:<span class="token punctuation">\\</span>Users<span class="token operator">&gt;</span> java -version
+import{_ as t}from"./plugin-vue_export-helper.21dcd24c.js";import{r as o,o as s,c as i,a,b as r,e as l,d as e}from"./app.615e41d8.js";const c={},d=l(`<h1 id="jvm-\u6838\u5FC3\u77E5\u8BC6\u70B9\u603B\u7ED3" tabindex="-1"><a class="header-anchor" href="#jvm-\u6838\u5FC3\u77E5\u8BC6\u70B9\u603B\u7ED3" aria-hidden="true">#</a> JVM \u6838\u5FC3\u77E5\u8BC6\u70B9\u603B\u7ED3</h1><h2 id="\u4E00\u3001\u57FA\u672C\u6982\u5FF5" tabindex="-1"><a class="header-anchor" href="#\u4E00\u3001\u57FA\u672C\u6982\u5FF5" aria-hidden="true">#</a> \u4E00\u3001\u57FA\u672C\u6982\u5FF5</h2><h3 id="_1-1-openjdk" tabindex="-1"><a class="header-anchor" href="#_1-1-openjdk" aria-hidden="true">#</a> 1.1 OpenJDK</h3><p>\u81EA 1996 \u5E74 <code>JDK 1.0</code> \u53D1\u5E03\u4EE5\u6765\uFF0CSun \u516C\u53F8\u5728\u5927\u7248\u672C\u4E0A\u53D1\u884C\u4E86 <code>JDK 1.1</code>\u3001<code>JDK 1.2</code>\u3001<code>JDK 1.3</code>\u3001<code>JDK 1.4</code>\u3001<code>JDK 5</code>\uFF0C<code>JDK 6</code> \uFF0C\u8FD9\u4E9B\u7248\u672C\u7684 JDK \u90FD\u53EF\u4EE5\u7EDF\u79F0\u4E3A SunJDK \u3002\u4E4B\u540E\u5728 2006 \u5E74\u7684 JavaOne \u5927\u4F1A\u4E0A\uFF0CSun \u516C\u53F8\u5BA3\u5E03\u5C06 Java \u5F00\u6E90\uFF0C\u5728\u968F\u540E\u7684\u4E00\u5E74\u591A\u91CC\uFF0C\u5B83\u9646\u7EED\u5C06 JDK \u7684\u5404\u4E2A\u90E8\u5206\u5728 GPL v2\uFF08GNU General Public License\uFF0Cversion 2\uFF09\u534F\u8BAE\u4E0B\u5F00\u6E90\uFF0C\u5E76\u5EFA\u7ACB\u4E86 OpenJDK \u7EC4\u7EC7\u6765\u5BF9\u8FD9\u4E9B\u4EE3\u7801\u8FDB\u884C\u72EC\u7ACB\u7684\u7BA1\u7406\uFF0C\u8FD9\u5C31\u662F OpenJDK \u7684\u6765\u6E90\uFF0C\u6B64\u65F6\u7684 OpenJDK \u62E5\u6709\u5F53\u65F6 sunJDK 7 \u7684\u51E0\u4E4E\u5168\u90E8\u4EE3\u7801\u3002</p><h3 id="_1-2-oraclejdk" tabindex="-1"><a class="header-anchor" href="#_1-2-oraclejdk" aria-hidden="true">#</a> 1.2 OracleJDK</h3><p>\u5728 JDK 7 \u7684\u5F00\u53D1\u671F\u95F4\uFF0C\u7531\u4E8E\u5404\u79CD\u539F\u56E0\u7684\u5F71\u54CD Sun \u516C\u53F8\u5E02\u503C\u4E00\u8DEF\u4E0B\u8DCC\uFF0C\u5DF2\u65E0\u529B\u63A8\u8FDB JDK 7 \u7684\u5F00\u53D1\uFF0CJDK 7 \u7684\u53D1\u5E03\u4E00\u76F4\u88AB\u63A8\u8FDF\u3002\u4E4B\u540E\u5728 2009 \u5E74 Sun \u516C\u53F8\u88AB Oracle \u516C\u53F8\u6240\u6536\u8D2D\uFF0C\u4E3A\u89E3\u51B3 JDK 7 \u957F\u671F\u8DF3\u7968\u7684\u95EE\u9898\uFF0COracle \u5C06 JDK 7 \u4E2D\u5927\u90E8\u5206\u672A\u80FD\u5B8C\u6210\u7684\u9879\u76EE\u63A8\u8FDF\u5230 JDK 8 \uFF0C\u5E76\u4E8E 2011 \u5E74\u53D1\u5E03\u4E86JDK 7\uFF0C\u5728\u8FD9\u4E4B\u540E\u7531 Oracle \u516C\u53F8\u6B63\u5E38\u53D1\u884C\u7684 JDK \u7248\u672C\u5C31\u7531 SunJDK \u6539\u79F0\u4E3A Oracle JDK\u3002</p><p>\u5728 2017 \u5E74 JDK 9 \u53D1\u5E03\u540E\uFF0COracle \u516C\u53F8\u5BA3\u5E03\u4ECE\u6B64\u4EE5\u540E JDK \u5C06\u4F1A\u5728\u6BCF\u5E74\u7684 3 \u6708\u548C 9 \u6708\u5404\u53D1\u5E03\u4E00\u4E2A\u5927\u7248\u672C\uFF0C\u5373\u534A\u5E74\u53D1\u884C\u4E00\u4E2A\u5927\u7248\u672C\uFF0C\u76EE\u7684\u662F\u4E3A\u4E86\u907F\u514D\u4F17\u591A\u529F\u80FD\u88AB\u6346\u7ED1\u5230\u4E00\u4E2A JDK \u7248\u672C\u4E0A\u800C\u5F15\u53D1\u7684\u65E0\u6CD5\u4EA4\u4ED8\u7684\u98CE\u9669\u3002</p><p>\u5728 JDK 11 \u53D1\u5E03\u540E\uFF0COracle \u540C\u6B65\u8C03\u6574\u4E86 JDK \u7684\u5546\u4E1A\u6388\u6743\uFF0C\u5BA3\u5E03\u4ECE JDK 11 \u8D77\u5C06\u4EE5\u524D\u7684\u5546\u4E1A\u7279\u6027\u5168\u90E8\u5F00\u6E90\u7ED9 OpenJDK \uFF0C\u8FD9\u6837 OpenJDK 11 \u548C OracleJDK 11 \u7684\u4EE3\u7801\u548C\u529F\u80FD\uFF0C\u5728\u672C\u8D28\u4E0A\u5C31\u5B8C\u5168\u76F8\u540C\u4E86\u3002\u540C\u65F6\u8FD8\u5BA3\u5E03\u4EE5\u540E\u90FD\u4F1A\u53D1\u884C\u4E24\u4E2A\u7248\u672C\u7684 JDK \uFF1A</p><ul><li>\u4E00\u4E2A\u662F\u5728 GPLv2 + CE \u534F\u8BAE\u4E0B\u7531 Oracle \u5F00\u6E90\u7684 OpenJDK\uFF1B</li><li>\u4E00\u4E2A\u662F\u5728 OTN \u534F\u8BAE\u4E0B\u6B63\u5E38\u53D1\u884C\u7684 OracleJDK\u3002</li></ul><p>\u4E24\u8005\u5171\u4EAB\u5927\u90E8\u5206\u6E90\u7801\uFF0C\u5728\u529F\u80FD\u4E0A\u51E0\u4E4E\u4E00\u81F4\u3002\u552F\u4E00\u7684\u533A\u522B\u662F Oracle OpenJDK \u53EF\u4EE5\u5728\u5F00\u53D1\u3001\u6D4B\u8BD5\u6216\u8005\u751F\u4EA7\u73AF\u5883\u4E2D\u4F7F\u7528\uFF0C\u4F46\u53EA\u6709\u534A\u5E74\u7684\u66F4\u65B0\u652F\u6301\uFF1B\u800C OracleJDK \u5BF9\u4E2A\u4EBA\u514D\u8D39\uFF0C\u4F46\u5728\u751F\u4EA7\u73AF\u5883\u4E2D\u5546\u7528\u6536\u8D39\uFF0C\u53EF\u4EE5\u6709\u4E09\u5E74\u65F6\u95F4\u7684\u66F4\u65B0\u652F\u6301\u3002</p><h3 id="_1-3-hotspot-vm" tabindex="-1"><a class="header-anchor" href="#_1-3-hotspot-vm" aria-hidden="true">#</a> 1.3 HotSpot VM</h3><p>\u5B83\u662F Sun/Oracle JDK \u548C OpenJDK \u4E2D\u9ED8\u8BA4\u7684\u865A\u62DF\u673A\uFF0C\u4E5F\u662F\u76EE\u524D\u4F7F\u7528\u6700\u4E3A\u5E7F\u6CDB\u7684\u865A\u62DF\u673A\u3002\u6700\u521D\u7531 Longview Technologies \u516C\u53F8\u8BBE\u8BA1\u53D1\u660E\uFF0C\u8BE5\u516C\u53F8\u5728 1997 \u5E74\u88AB Sun \u516C\u53F8\u6536\u8D2D\uFF0C\u968F\u540E Sun \u516C\u53F8\u5728 2006 \u5E74\u5F00\u6E90 SunJDK \u65F6\u4E5F\u5C06 HotSpot \u865A\u62DF\u673A\u4E00\u5E76\u8FDB\u884C\u4E86\u5F00\u6E90\u3002\u4E4B\u540E Oracle \u6536\u8D2D Sun \u4EE5\u540E\uFF0C\u5EFA\u7ACB\u4E86 HotRockit \u9879\u76EE\uFF0C\u5E76\u5C06\u5176\u6536\u8D2D\u7684\u53E6\u5916\u4E00\u5BB6\u516C\u53F8\uFF08BEA\uFF09\u7684 JRockit \u865A\u62DF\u673A\u4E2D\u7684\u4F18\u79C0\u7279\u6027\u96C6\u6210\u5230 HotSpot \u4E2D\u3002HotSpot \u5728\u8FD9\u4E2A\u8FC7\u7A0B\u91CC\u9762\u79FB\u9664\u6389\u6C38\u4E45\u4EE3\uFF0C\u5E76\u5438\u6536\u4E86 JRockit \u7684 Java Mission Control \u76D1\u63A7\u5DE5\u5177\u7B49\u529F\u80FD\u3002\u5230 JDK 8 \u53D1\u884C\u65F6\uFF0C\u91C7\u7528\u7684\u5C31\u662F\u96C6\u4E24\u8005\u4E4B\u957F\u7684 HotSpot VM \u3002</p><p>\u6211\u4EEC\u53EF\u4EE5\u5728\u81EA\u5DF1\u7684\u7535\u8111\u4E0A\u4F7F\u7528 <code>java -version</code> \u6765\u83B7\u5F97 JDK \u7684\u4FE1\u606F\uFF1A</p><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code>C:<span class="token punctuation">\\</span>Users<span class="token operator">&gt;</span> java -version
 java version <span class="token string">&quot;1.8.0_171&quot;</span>   <span class="token comment"># \u5982\u679C\u662FopenJDK, \u5219\u8FD9\u91CC\u4F1A\u663E\u793A\uFF1Aopenjdk version</span>
 Java<span class="token punctuation">(</span>TM<span class="token punctuation">)</span> SE Runtime Environment <span class="token punctuation">(</span>build <span class="token number">1.8</span>.0_171-b11<span class="token punctuation">)</span>
 Java HotSpot<span class="token punctuation">(</span>TM<span class="token punctuation">)</span> <span class="token number">64</span>-Bit Server VM <span class="token punctuation">(</span>build <span class="token number">25.171</span>-b11, mixed mode<span class="token punctuation">)</span> <span class="token comment"># \u4F7F\u7528\u7684\u662FHotSpot\u865A\u62DF\u673A\uFF0C\u9ED8\u8BA4\u4E3A\u670D\u52A1\u7AEF\u6A21\u5F0F</span>
diff --git a/dist/baguwen/java-basic-34.html b/dist/baguwen/java-basic-34.html
index 854edea6..bf4e045c 100644
--- a/dist/baguwen/java-basic-34.html
+++ b/dist/baguwen/java-basic-34.html
@@ -39,10 +39,10 @@
       }
     </script>
     <link rel="stylesheet" href="/assets/style.aa7884a9.css">
-    <link rel="modulepreload" href="/assets/app.a0271b9c.js"><link rel="modulepreload" href="/assets/java-basic-34.html.ff9af0e4.js"><link rel="modulepreload" href="/assets/plugin-vue_export-helper.21dcd24c.js"><link rel="modulepreload" href="/assets/java-basic-34.html.70be78f8.js">
+    <link rel="modulepreload" href="/assets/app.615e41d8.js"><link rel="modulepreload" href="/assets/java-basic-34.html.c0108ee7.js"><link rel="modulepreload" href="/assets/plugin-vue_export-helper.21dcd24c.js"><link rel="modulepreload" href="/assets/java-basic-34.html.70be78f8.js">
   </head>
   <body>
-    <div id="app"><!--[--><!--[--><!--[--><span tabindex="-1"></span><a href="#main-content" class="skip-link sr-only">Skip to content</a><!--]--><div class="theme-container has-toc"><!--[--><!--[--><header class="navbar"><div class="navbar-left"><button class="toggle-sidebar-button" title="Toggle Sidebar"><span class="icon"></span></button><!----><a href="/" class="brand"><img class="logo" src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/logo-02.png" alt="Java 程序员进阶之路"><!----><span class="site-name hide-in-pad">Java 程序员进阶之路</span></a><!----></div><div class="navbar-center"><!----><nav class="nav-links"><div class="nav-item hide-in-mobile"><a href="/home.html" class="nav-link" aria-label="进阶之路"><span class="icon iconfont icon-lujing" style=""></span>进阶之路<!----></a></div><div class="nav-item hide-in-mobile"><a href="/zhishixingqiu/java-mianshi-zhinan.html" class="nav-link" aria-label="星球专栏"><span class="icon iconfont icon-Artboard" style=""></span>星球专栏<!----></a></div><div 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sidebar-page" aria-label="Java HashMap精选面试题"><!---->Java HashMap精选面试题<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/mianjing/redis12question.html" class="nav-link sidebar-link sidebar-page" aria-label="Redis：12道精选高频面试题"><!---->Redis：12道精选高频面试题<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/nginx/40-interview.html" class="nav-link sidebar-link sidebar-page" aria-label="Nginx：40道精选面试题必看👍"><!---->Nginx：40道精选面试题必看👍<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">背诵版八股文</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">城市选择</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java：34道精选高频面试题必看👍</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 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18.547z"></path></svg><ul class="categories-wrapper"><li class="category category4" role>求职面试</li><meta property="articleSection" content="求职面试"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag7" role>面试题集合</li></ul><meta property="keywords" content="面试题集合"></span><span class="reading-time-info" aria-label="阅读时间⌛" 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15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 21 分钟</span><meta property="timeRequired" content="PT21M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/baguwen/java-basic-34.html#_1-介绍一下-java-吧" class="router-link-active router-link-exact-active toc-link level2">1.介绍一下 java 吧</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/baguwen/java-basic-34.html#_2-java-有哪些数据类型" class="router-link-active router-link-exact-active toc-link level2">2.java 有哪些数据类型？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/baguwen/java-basic-34.html#_3-接口和抽象类有什么区别" class="router-link-active router-link-exact-active toc-link level2">3.接口和抽象类有什么区别？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/baguwen/java-basic-34.html#_4-重载和重写什么区别" 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toc-link level2">26.聊聊 ReentrantLock 吧</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/baguwen/java-basic-34.html#_27-多线程的创建方式有哪些" class="router-link-active router-link-exact-active toc-link level2">27.多线程的创建方式有哪些？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/baguwen/java-basic-34.html#_28-线程池有哪些参数" class="router-link-active router-link-exact-active toc-link level2">28.线程池有哪些参数？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/baguwen/java-basic-34.html#_29-线程池的执行流程" class="router-link-active router-link-exact-active toc-link level2">29.线程池的执行流程？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/baguwen/java-basic-34.html#_30-线程池的拒绝策略有哪些" class="router-link-active router-link-exact-active toc-link level2">30.线程池的拒绝策略有哪些？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/baguwen/java-basic-34.html#_31-介绍一下四种引用类型" class="router-link-active router-link-exact-active toc-link level2">31.介绍一下四种引用类型?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/baguwen/java-basic-34.html#_32-深拷贝、浅拷贝是什么" class="router-link-active router-link-exact-active toc-link level2">32.深拷贝、浅拷贝是什么？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/baguwen/java-basic-34.html#_33-聊聊-threadlocal-吧" class="router-link-active router-link-exact-active toc-link level2">33.聊聊 ThreadLocal 吧</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/baguwen/java-basic-34.html#_34-一个对象的内存布局是怎么样的" class="router-link-active router-link-exact-active toc-link level2">34.一个对象的内存布局是怎么样的?</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="java-34道精选高频面试题必看" tabindex="-1"><a class="header-anchor" href="#java-34道精选高频面试题必看" aria-hidden="true">#</a> Java：34道精选高频面试题必看👍</h1><h2 id="_1-介绍一下-java-吧" tabindex="-1"><a class="header-anchor" href="#_1-介绍一下-java-吧" aria-hidden="true">#</a> 1.介绍一下 java 吧</h2><p>java 是一门<strong>开源的跨平台的面向对象的</strong>计算机语言.</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/baguwen/basic-34-01.png" alt=""></p><p>跨平台是因为 java 的 class 文件是运行在虚拟机上的,其实跨平台的,而<strong>虚拟机是不同平台有不同版本</strong>,所以说 java 是跨平台的.</p><p>面向对象有几个特点:</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/baguwen/basic-34-02.png" alt=""></p><ul><li>1.<strong>封装</strong><ul><li>两层含义：一层含义是把对象的属性和行为看成一个密不可分的整体，将这两者&#39;封装&#39;在一个不可分割的<strong>独立单元</strong>(即对象)中</li><li>另一层含义指&#39;信息隐藏，把不需要让外界知道的信息隐藏起来，有些对象的属性及行为允许外界用户知道或使用，但不允许更改，而另一些属性或行为，则不允许外界知晓，或只允许使用对象的功能，而尽可能<strong>隐藏对象的功能实现细节</strong>。</li></ul></li></ul><p><strong>优点</strong>:</p><blockquote><p>1.良好的封装能够<strong>减少耦合</strong>，符合程序设计追求&#39;高内聚，低耦合&#39;。<br> 2.<strong>类内部的结构可以自由修改</strong>。<br> 3.可以对成员变量进行更<strong>精确的控制</strong>。<br> 4.<strong>隐藏信息</strong>实现细节。<br></p></blockquote><ul><li>2.<strong>继承</strong><ul><li>继承就是子类继承父类的特征和行为，使得子类对象（实例）具有父类的实例域和方法，或子类从父类继承方法，使得子类具有父类相同的行为。</li></ul></li></ul><p><strong>优点</strong>:</p><blockquote><p>1.提高类代码的<strong>复用性</strong><br> 2.提高了代码的<strong>维护性</strong><br></p></blockquote><ul><li>3.<strong>多态</strong><ul><li>多态是同一个行为具有多个不同表现形式或形态的能力。Java语言中含有方法重载与对象多态两种形式的多态： <ul><li>1.<strong>方法重载</strong>：在一个类中，允许多个方法使用同一个名字，但方法的参数不同，完成的功能也不同。</li><li>2.<strong>对象多态</strong>：子类对象可以与父类对象进行转换，而且根据其使用的子类不同完成的功能也不同（重写父类的方法）。</li></ul></li></ul></li></ul><p><strong>优点</strong></p><blockquote><ol><li><strong>消除类型之间的耦合关系</strong><br></li><li><strong>可替换性</strong><br></li><li><strong>可扩充性</strong><br></li><li><strong>接口性</strong><br></li><li><strong>灵活性</strong><br></li><li><strong>简化性</strong><br></li></ol></blockquote><h2 id="_2-java-有哪些数据类型" tabindex="-1"><a class="header-anchor" href="#_2-java-有哪些数据类型" aria-hidden="true">#</a> 2.java 有哪些数据类型？</h2><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/baguwen/basic-34-03.png" alt=""></p><p>java 主要有两种数据类型</p><ul><li>1.<strong>基本数据类型</strong><ul><li>基本数据有<strong>八个</strong>, <ul><li>byte,short,int,long属于数值型中的整数型</li><li>float,double属于数值型中的浮点型</li><li>char属于字符型</li><li>boolean属于布尔型</li></ul></li></ul></li><li>2.<strong>引用数据类型</strong><ul><li>引用数据类型有<strong>三个</strong>,分别是类,接口和数组</li></ul></li></ul><h2 id="_3-接口和抽象类有什么区别" tabindex="-1"><a class="header-anchor" href="#_3-接口和抽象类有什么区别" aria-hidden="true">#</a> 3.接口和抽象类有什么区别？</h2><ul><li>1.接口是抽象类的变体，<strong>接口中所有的方法都是抽象的</strong>。而抽象类是声明方法的存在而不去实现它的类。</li><li>2.接口可以多继承，抽象类不行。</li><li>3.接口定义方法，不能实现，默认是 <strong>public abstract</strong>，而抽象类可以实现部分方法。</li><li>4.接口中基本数据类型为 <strong>public static final</strong> 并且需要给出初始值，而抽类象不是的。</li></ul><h2 id="_4-重载和重写什么区别" tabindex="-1"><a class="header-anchor" href="#_4-重载和重写什么区别" aria-hidden="true">#</a> 4.重载和重写什么区别？</h2><p>重写：</p><ul><li>1.参数列表必须<strong>完全与被重写的方法</strong>相同，否则不能称其为重写而是重载.</li><li>2.<strong>返回的类型必须一直与被重写的方法的返回类型相同</strong>，否则不能称其为重写而是重载。</li><li>3.访问<strong>修饰符的限制一定要大于被重写方法的访问修饰符</strong></li><li>4.重写方法一定<strong>不能抛出新的检查异常或者比被重写方法申明更加宽泛的检查型异常</strong>。</li></ul><p>重载：</p><ul><li>1.必须具有<strong>不同的参数列表</strong>；</li><li>2.可以有不同的返回类型，只要参数列表不同就可以了；</li><li>3.可以有<strong>不同的访问修饰符</strong>；</li><li>4.可以抛出<strong>不同的异常</strong>；</li></ul><h2 id="_5-常见的异常有哪些" tabindex="-1"><a class="header-anchor" href="#_5-常见的异常有哪些" aria-hidden="true">#</a> 5.常见的异常有哪些？</h2><ul><li>NullPointerException 空指针异常</li><li>ArrayIndexOutOfBoundsException 索引越界异常</li><li>InputFormatException 输入类型不匹配</li><li>SQLException SQL异常</li><li>IllegalArgumentException 非法参数</li><li>NumberFormatException 类型转换异常 等等....</li></ul><h2 id="_6-异常要怎么解决" tabindex="-1"><a class="header-anchor" href="#_6-异常要怎么解决" aria-hidden="true">#</a> 6.异常要怎么解决？</h2><p>Java标准库内建了一些通用的异常，这些类以Throwable为顶层父类。</p><p>Throwable又派生出<strong>Error类和Exception类</strong>。</p><p>错误：Error类以及他的子类的实例，代表了JVM本身的错误。错误不能被程序员通过代码处理，Error很少出现。因此，程序员应该关注Exception为父类的分支下的各种异常类。</p><p>异常：Exception以及他的子类，代表程序运行时发送的各种不期望发生的事件。可以被Java异常处理机制使用，是异常处理的核心。</p><p>处理方法:</p><ul><li>1.<strong>try()catch(){}</strong></li></ul><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>try{
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aria-current="page" href="/baguwen/java-basic-34.html#_33-聊聊-threadlocal-吧" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="33.聊聊 ThreadLocal 吧"><!---->33.聊聊 ThreadLocal 吧<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/baguwen/java-basic-34.html#_34-一个对象的内存布局是怎么样的" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="34.一个对象的内存布局是怎么样的?"><!---->34.一个对象的内存布局是怎么样的?<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/collection/hashmap-interview.html" class="nav-link sidebar-link sidebar-page" aria-label="Java HashMap精选面试题"><!---->Java HashMap精选面试题<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/mianjing/redis12question.html" class="nav-link sidebar-link sidebar-page" aria-label="Redis：12道精选高频面试题"><!---->Redis：12道精选高频面试题<!----></a><ul 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class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java：34道精选高频面试题必看👍</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 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00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2021年12月16日</span><meta property="datePublished" content="2021-12-16T03:36:50.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category4" role>求职面试</li><meta property="articleSection" content="求职面试"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 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354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 21 分钟</span><meta property="timeRequired" content="PT21M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/baguwen/java-basic-34.html#_1-介绍一下-java-吧" class="router-link-active router-link-exact-active toc-link level2">1.介绍一下 java 吧</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/baguwen/java-basic-34.html#_2-java-有哪些数据类型" class="router-link-active router-link-exact-active toc-link level2">2.java 有哪些数据类型？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/baguwen/java-basic-34.html#_3-接口和抽象类有什么区别" class="router-link-active router-link-exact-active toc-link level2">3.接口和抽象类有什么区别？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/baguwen/java-basic-34.html#_4-重载和重写什么区别" class="router-link-active router-link-exact-active toc-link level2">4.重载和重写什么区别？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/baguwen/java-basic-34.html#_5-常见的异常有哪些" class="router-link-active router-link-exact-active toc-link level2">5.常见的异常有哪些？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/baguwen/java-basic-34.html#_6-异常要怎么解决" class="router-link-active router-link-exact-active toc-link level2">6.异常要怎么解决？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/baguwen/java-basic-34.html#_7-arraylist-和-linkedlist-的区别" class="router-link-active router-link-exact-active toc-link level2">7.arrayList 和 linkedList 的区别？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/baguwen/java-basic-34.html#_8-hashmap-1-7-和-hashmap-1-8-的区别" class="router-link-active router-link-exact-active toc-link level2">8.hashMap 1.7 和 hashMap 1.8 的区别？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/baguwen/java-basic-34.html#_9-hashmap-线程不安全体现在哪里" class="router-link-active router-link-exact-active toc-link level2">9.hashMap 线程不安全体现在哪里？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/baguwen/java-basic-34.html#_10-那么-hashmap-线程不安全怎么解决" class="router-link-active router-link-exact-active toc-link level2">10.那么 hashMap 线程不安全怎么解决？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/baguwen/java-basic-34.html#_11-concurrenthashmap-1-7-和-1-8-有什么区别" class="router-link-active router-link-exact-active toc-link level2">11.concurrentHashMap 1.7 和 1.8 有什么区别</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/baguwen/java-basic-34.html#_12-介绍一下-hashset-吧" class="router-link-active router-link-exact-active toc-link level2">12.介绍一下 hashset 吧</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/baguwen/java-basic-34.html#_13-什么是泛型" class="router-link-active router-link-exact-active toc-link level2">13.什么是泛型？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/baguwen/java-basic-34.html#_14-泛型擦除是什么" class="router-link-active router-link-exact-active toc-link level2">14.泛型擦除是什么？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/baguwen/java-basic-34.html#_15-说说进程和线程的区别" class="router-link-active router-link-exact-active toc-link level2">15.说说进程和线程的区别？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/baguwen/java-basic-34.html#_16-volatile-有什么作用" class="router-link-active router-link-exact-active toc-link level2">16.volatile 有什么作用？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/baguwen/java-basic-34.html#_17-什么是包装类-为什么需要包装类" class="router-link-active router-link-exact-active toc-link level2">17.什么是包装类？为什么需要包装类？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/baguwen/java-basic-34.html#_18-integer-a-1000-integer-b-1000-a-b-的结果是什么-那如果-a-b-都为1-结果又是什么" class="router-link-active router-link-exact-active toc-link level2">18.Integer a = 1000，Integer b = 1000，a==b 的结果是什么？那如果 a，b 都为1，结果又是什么？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/baguwen/java-basic-34.html#_19-jmm-是什么" class="router-link-active router-link-exact-active toc-link level2">19.JMM 是什么？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/baguwen/java-basic-34.html#_20-创建对象有哪些方式" class="router-link-active router-link-exact-active toc-link level2">20.创建对象有哪些方式</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/baguwen/java-basic-34.html#_21-讲讲单例模式懒汉式吧" class="router-link-active router-link-exact-active toc-link level2">21.讲讲单例模式懒汉式吧</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/baguwen/java-basic-34.html#_22-volatile-有什么作用" class="router-link-active router-link-exact-active toc-link level2">22.volatile 有什么作用</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/baguwen/java-basic-34.html#_23-怎么保证线程安全" class="router-link-active router-link-exact-active toc-link level2">23.怎么保证线程安全？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/baguwen/java-basic-34.html#_24-synchronized-锁升级的过程" class="router-link-active router-link-exact-active toc-link level2">24.synchronized 锁升级的过程</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/baguwen/java-basic-34.html#_25-cas-是什么" class="router-link-active router-link-exact-active toc-link level2">25.cas 是什么？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/baguwen/java-basic-34.html#_26-聊聊-reentrantlock-吧" class="router-link-active router-link-exact-active toc-link level2">26.聊聊 ReentrantLock 吧</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/baguwen/java-basic-34.html#_27-多线程的创建方式有哪些" class="router-link-active router-link-exact-active toc-link level2">27.多线程的创建方式有哪些？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/baguwen/java-basic-34.html#_28-线程池有哪些参数" class="router-link-active router-link-exact-active toc-link level2">28.线程池有哪些参数？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/baguwen/java-basic-34.html#_29-线程池的执行流程" class="router-link-active router-link-exact-active toc-link level2">29.线程池的执行流程？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/baguwen/java-basic-34.html#_30-线程池的拒绝策略有哪些" class="router-link-active router-link-exact-active toc-link level2">30.线程池的拒绝策略有哪些？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/baguwen/java-basic-34.html#_31-介绍一下四种引用类型" class="router-link-active router-link-exact-active toc-link level2">31.介绍一下四种引用类型?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/baguwen/java-basic-34.html#_32-深拷贝、浅拷贝是什么" class="router-link-active router-link-exact-active toc-link level2">32.深拷贝、浅拷贝是什么？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/baguwen/java-basic-34.html#_33-聊聊-threadlocal-吧" class="router-link-active router-link-exact-active toc-link level2">33.聊聊 ThreadLocal 吧</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/baguwen/java-basic-34.html#_34-一个对象的内存布局是怎么样的" class="router-link-active router-link-exact-active toc-link level2">34.一个对象的内存布局是怎么样的?</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="java-34道精选高频面试题必看" tabindex="-1"><a class="header-anchor" href="#java-34道精选高频面试题必看" aria-hidden="true">#</a> Java：34道精选高频面试题必看👍</h1><h2 id="_1-介绍一下-java-吧" tabindex="-1"><a class="header-anchor" href="#_1-介绍一下-java-吧" aria-hidden="true">#</a> 1.介绍一下 java 吧</h2><p>java 是一门<strong>开源的跨平台的面向对象的</strong>计算机语言.</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/baguwen/basic-34-01.png" alt=""></p><p>跨平台是因为 java 的 class 文件是运行在虚拟机上的,其实跨平台的,而<strong>虚拟机是不同平台有不同版本</strong>,所以说 java 是跨平台的.</p><p>面向对象有几个特点:</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/baguwen/basic-34-02.png" alt=""></p><ul><li>1.<strong>封装</strong><ul><li>两层含义：一层含义是把对象的属性和行为看成一个密不可分的整体，将这两者&#39;封装&#39;在一个不可分割的<strong>独立单元</strong>(即对象)中</li><li>另一层含义指&#39;信息隐藏，把不需要让外界知道的信息隐藏起来，有些对象的属性及行为允许外界用户知道或使用，但不允许更改，而另一些属性或行为，则不允许外界知晓，或只允许使用对象的功能，而尽可能<strong>隐藏对象的功能实现细节</strong>。</li></ul></li></ul><p><strong>优点</strong>:</p><blockquote><p>1.良好的封装能够<strong>减少耦合</strong>，符合程序设计追求&#39;高内聚，低耦合&#39;。<br> 2.<strong>类内部的结构可以自由修改</strong>。<br> 3.可以对成员变量进行更<strong>精确的控制</strong>。<br> 4.<strong>隐藏信息</strong>实现细节。<br></p></blockquote><ul><li>2.<strong>继承</strong><ul><li>继承就是子类继承父类的特征和行为，使得子类对象（实例）具有父类的实例域和方法，或子类从父类继承方法，使得子类具有父类相同的行为。</li></ul></li></ul><p><strong>优点</strong>:</p><blockquote><p>1.提高类代码的<strong>复用性</strong><br> 2.提高了代码的<strong>维护性</strong><br></p></blockquote><ul><li>3.<strong>多态</strong><ul><li>多态是同一个行为具有多个不同表现形式或形态的能力。Java语言中含有方法重载与对象多态两种形式的多态： <ul><li>1.<strong>方法重载</strong>：在一个类中，允许多个方法使用同一个名字，但方法的参数不同，完成的功能也不同。</li><li>2.<strong>对象多态</strong>：子类对象可以与父类对象进行转换，而且根据其使用的子类不同完成的功能也不同（重写父类的方法）。</li></ul></li></ul></li></ul><p><strong>优点</strong></p><blockquote><ol><li><strong>消除类型之间的耦合关系</strong><br></li><li><strong>可替换性</strong><br></li><li><strong>可扩充性</strong><br></li><li><strong>接口性</strong><br></li><li><strong>灵活性</strong><br></li><li><strong>简化性</strong><br></li></ol></blockquote><h2 id="_2-java-有哪些数据类型" tabindex="-1"><a class="header-anchor" href="#_2-java-有哪些数据类型" aria-hidden="true">#</a> 2.java 有哪些数据类型？</h2><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/baguwen/basic-34-03.png" alt=""></p><p>java 主要有两种数据类型</p><ul><li>1.<strong>基本数据类型</strong><ul><li>基本数据有<strong>八个</strong>, <ul><li>byte,short,int,long属于数值型中的整数型</li><li>float,double属于数值型中的浮点型</li><li>char属于字符型</li><li>boolean属于布尔型</li></ul></li></ul></li><li>2.<strong>引用数据类型</strong><ul><li>引用数据类型有<strong>三个</strong>,分别是类,接口和数组</li></ul></li></ul><h2 id="_3-接口和抽象类有什么区别" tabindex="-1"><a class="header-anchor" href="#_3-接口和抽象类有什么区别" aria-hidden="true">#</a> 3.接口和抽象类有什么区别？</h2><ul><li>1.接口是抽象类的变体，<strong>接口中所有的方法都是抽象的</strong>。而抽象类是声明方法的存在而不去实现它的类。</li><li>2.接口可以多继承，抽象类不行。</li><li>3.接口定义方法，不能实现，默认是 <strong>public abstract</strong>，而抽象类可以实现部分方法。</li><li>4.接口中基本数据类型为 <strong>public static final</strong> 并且需要给出初始值，而抽类象不是的。</li></ul><h2 id="_4-重载和重写什么区别" tabindex="-1"><a class="header-anchor" href="#_4-重载和重写什么区别" aria-hidden="true">#</a> 4.重载和重写什么区别？</h2><p>重写：</p><ul><li>1.参数列表必须<strong>完全与被重写的方法</strong>相同，否则不能称其为重写而是重载.</li><li>2.<strong>返回的类型必须一直与被重写的方法的返回类型相同</strong>，否则不能称其为重写而是重载。</li><li>3.访问<strong>修饰符的限制一定要大于被重写方法的访问修饰符</strong></li><li>4.重写方法一定<strong>不能抛出新的检查异常或者比被重写方法申明更加宽泛的检查型异常</strong>。</li></ul><p>重载：</p><ul><li>1.必须具有<strong>不同的参数列表</strong>；</li><li>2.可以有不同的返回类型，只要参数列表不同就可以了；</li><li>3.可以有<strong>不同的访问修饰符</strong>；</li><li>4.可以抛出<strong>不同的异常</strong>；</li></ul><h2 id="_5-常见的异常有哪些" tabindex="-1"><a class="header-anchor" href="#_5-常见的异常有哪些" aria-hidden="true">#</a> 5.常见的异常有哪些？</h2><ul><li>NullPointerException 空指针异常</li><li>ArrayIndexOutOfBoundsException 索引越界异常</li><li>InputFormatException 输入类型不匹配</li><li>SQLException SQL异常</li><li>IllegalArgumentException 非法参数</li><li>NumberFormatException 类型转换异常 等等....</li></ul><h2 id="_6-异常要怎么解决" tabindex="-1"><a class="header-anchor" href="#_6-异常要怎么解决" aria-hidden="true">#</a> 6.异常要怎么解决？</h2><p>Java标准库内建了一些通用的异常，这些类以Throwable为顶层父类。</p><p>Throwable又派生出<strong>Error类和Exception类</strong>。</p><p>错误：Error类以及他的子类的实例，代表了JVM本身的错误。错误不能被程序员通过代码处理，Error很少出现。因此，程序员应该关注Exception为父类的分支下的各种异常类。</p><p>异常：Exception以及他的子类，代表程序运行时发送的各种不期望发生的事件。可以被Java异常处理机制使用，是异常处理的核心。</p><p>处理方法:</p><ul><li>1.<strong>try()catch(){}</strong></li></ul><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>try{
 // 程序代码
 }catch(ExceptionName e1){
 //Catch 块
@@ -141,6 +141,6 @@ try {
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h2 id="_28-线程池有哪些参数" tabindex="-1"><a class="header-anchor" href="#_28-线程池有哪些参数" aria-hidden="true">#</a> 28.线程池有哪些参数？</h2><ul><li><p><strong>1.corePoolSize</strong>：<strong>核心线程数</strong>，线程池中始终存活的线程数。</p></li><li><p><strong>2.maximumPoolSize</strong>: <strong>最大线程数</strong>，线程池中允许的最大线程数。</p></li><li><p><strong>3.keepAliveTime</strong>: <strong>存活时间</strong>，线程没有任务执行时最多保持多久时间会终止。</p></li><li><p><strong>4.unit</strong>: <strong>单位</strong>，参数keepAliveTime的时间单位，7种可选。</p></li><li><p><strong>5.workQueue</strong>: 一个<strong>阻塞队列</strong>，用来存储等待执行的任务，均为线程安全，7种可选。</p></li><li><p><strong>6.threadFactory</strong>: <strong>线程工厂</strong>，主要用来创建线程，默及正常优先级、非守护线程。</p></li><li><p><strong>7.handler</strong>：<strong>拒绝策略</strong>，拒绝处理任务时的策略，4种可选，默认为AbortPolicy。</p></li></ul><h2 id="_29-线程池的执行流程" tabindex="-1"><a class="header-anchor" href="#_29-线程池的执行流程" aria-hidden="true">#</a> 29.线程池的执行流程？</h2><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/baguwen/basic-34-14.png" alt=""></p><ul><li>判断线程池中的线程数<strong>是否大于设置的核心线程数</strong><ul><li>如果<strong>小于</strong>，就<strong>创建</strong>一个核心线程来执行任务</li><li>如果<strong>大于</strong>，就会<strong>判断缓冲队列是否满了</strong><ul><li>如果<strong>没有满</strong>，则<strong>放入队列</strong>，等待线程空闲时执行任务</li><li>如果队列已经<strong>满了</strong>，则判断<strong>是否达到了线程池设置的最大线程数</strong><ul><li>如果<strong>没有达到</strong>，就<strong>创建新线程</strong>来执行任务</li><li>如果已经<strong>达到了</strong>最大线程数，则<strong>执行指定的拒绝策略</strong></li></ul></li></ul></li></ul></li></ul><h2 id="_30-线程池的拒绝策略有哪些" tabindex="-1"><a class="header-anchor" href="#_30-线程池的拒绝策略有哪些" aria-hidden="true">#</a> 30.线程池的拒绝策略有哪些？</h2><ul><li><strong>AbortPolicy</strong>：直接丢弃任务，抛出异常，这是默认策略</li><li><strong>CallerRunsPolicy</strong>：只用调用者所在的线程来处理任务</li><li><strong>DiscardOldestPolicy</strong>：丢弃等待队列中最旧的任务，并执行当前任务</li><li><strong>DiscardPolicy</strong>：直接丢弃任务，也不抛出异常</li></ul><h2 id="_31-介绍一下四种引用类型" tabindex="-1"><a class="header-anchor" href="#_31-介绍一下四种引用类型" aria-hidden="true">#</a> 31.介绍一下四种引用类型?</h2><ul><li><strong>强引用 StrongReference</strong></li></ul><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>Object obj = new Object(); 
 //只要obj还指向Object对象，Object对象就不会被回收
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><p>垃圾回收器不会回收被引用的对象，哪怕内存不足时，JVM 也会直接抛出 OutOfMemoryError，除非赋值为 null。</p><ul><li><strong>软引用 SoftReference</strong></li></ul><p>软引用是用来描述一些非必需但仍有用的对象。在内存足够的时候，软引用对象不会被回收，只有在内存不足时，系统则会回收软引用对象，如果回收了软引用对象之后仍然没有足够的内存，才会抛出内存溢出异常。</p><ul><li><strong>弱引用 WeakReference</strong></li></ul><p>弱引用的引用强度比软引用要更弱一些，无论内存是否足够，只要 JVM 开始进行垃圾回收，那些被弱引用关联的对象都会被回收。</p><ul><li><strong>虚引用 PhantomReference</strong></li></ul><p>虚引用是最弱的一种引用关系，如果一个对象仅持有虚引用，那么它就和没有任何引用一样，它随时可能会被回收，在 JDK1.2 之后，用 PhantomReference 类来表示，通过查看这个类的源码，发现它只有一个构造函数和一个 get() 方法，而且它的 get() 方法仅仅是返回一个null，也就是说将永远无法通过虚引用来获取对象，虚引用必须要和 ReferenceQueue 引用队列一起使用，NIO 的堆外内存就是靠其管理。</p><h2 id="_32-深拷贝、浅拷贝是什么" tabindex="-1"><a class="header-anchor" href="#_32-深拷贝、浅拷贝是什么" aria-hidden="true">#</a> 32.深拷贝、浅拷贝是什么？</h2><ul><li>浅拷贝并不是真的拷贝，只是<strong>复制指向某个对象的指针</strong>，而不复制对象本身，新旧对象还是共享同一块内存。</li><li>深拷贝会另外<strong>创造一个一模一样的对象</strong>，新对象跟原对象不共享内存，修改新对象不会改到原对象。</li></ul><h2 id="_33-聊聊-threadlocal-吧" tabindex="-1"><a class="header-anchor" href="#_33-聊聊-threadlocal-吧" aria-hidden="true">#</a> 33.聊聊 ThreadLocal 吧</h2><ul><li>ThreadLocal其实就是<strong>线程本地变量</strong>，他会在每个线程都创建一个副本，那么在线程之间访问内部副本变量就行了，做到了线程之间互相隔离。 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/baguwen/basic-34-15.png" alt=""></li><li>ThreadLocal 有一个<strong>静态内部类 ThreadLocalMap</strong>，ThreadLocalMap 又包含了一个 Entry 数组，<strong>Entry 本身是一个弱引用</strong>，他的 key 是指向 ThreadLocal 的弱引用，<strong>弱引用的目的是为了防止内存泄露</strong>,如果是强引用那么除非线程结束,否则无法终止,可能会有内存泄漏的风险。</li><li>但是这样还是会存在内存泄露的问题，假如 key 和 ThreadLocal 对象被回收之后，entry 中就存在 key 为 null ，但是 value 有值的 entry 对象，但是永远没办法被访问到，同样除非线程结束运行。<strong>解决方法就是调用 remove 方法删除 entry 对象</strong>。</li></ul><h2 id="_34-一个对象的内存布局是怎么样的" tabindex="-1"><a class="header-anchor" href="#_34-一个对象的内存布局是怎么样的" aria-hidden="true">#</a> 34.一个对象的内存布局是怎么样的?</h2><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/baguwen/basic-34-16.png" alt=""></p><ul><li><strong>1.对象头</strong>: 对象头又分为 <strong>MarkWord</strong> 和 <strong>Class Pointer</strong> 两部分。 <ul><li><strong>MarkWord</strong>:包含一系列的标记位，比如轻量级锁的标记位，偏向锁标记位,gc记录信息等等。</li><li><strong>ClassPointer</strong>:用来指向对象对应的 Class 对象（其对应的元数据对象）的内存地址。在 32 位系统占 4 字节，在 64 位系统中占 8 字节。</li></ul></li><li><strong>2.Length</strong>:只在数组对象中存在，用来记录数组的长度，占用 4 字节</li><li><strong>3.Instance data</strong>: 对象实际数据，对象实际数据包括了对象的所有成员变量，其大小由各个成员变量的大小决定。(这里不包括静态成员变量，因为其是在方法区维护的)</li><li><strong>4.Padding</strong>:Java 对象占用空间是 8 字节对齐的，即所有 Java 对象占用 bytes 数必须是 8 的倍数,是因为当我们从磁盘中取一个数据时，不会说我想取一个字节就是一个字节，都是按照一块儿一块儿来取的，这一块大小是 8 个字节，所以为了完整，padding 的作用就是补充字节，<strong>保证对象是 8 字节的整数倍</strong>。</li></ul><hr><blockquote><p>作者：moon聊技术，转载链接：<a href="https://mp.weixin.qq.com/s/aTWtqPyMQ-6P_c8iuMVrkg" target="_blank" rel="noopener 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class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">城市选择</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java 基础八股文（背诵版）必看👍</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 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toc-link level3">Collection 和 Collections 有什么区别？</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="java-基础八股文-背诵版-必看" tabindex="-1"><a class="header-anchor" href="#java-基础八股文-背诵版-必看" aria-hidden="true">#</a> Java 基础八股文（背诵版）必看👍</h1><h3 id="java-语言具有哪些特点" tabindex="-1"><a class="header-anchor" href="#java-语言具有哪些特点" aria-hidden="true">#</a> Java 语言具有哪些特点？</h3><ul><li>Java 为纯面向对象的语言。它能够直接反应现实生活中的对象。</li><li>具有平台无关性。Java 利用 Java 虚拟机运行字节码，无论是在 Windows、Linux 还是 MacOS 等其它平台对 Java 程序进行编译，编译后的程序可在其它平台运行。</li><li>Java 为解释型语言，编译器把 Java 代码编译成平台无关的中间代码，然后在 JVM 上解释运行，具有很好的可移植性。</li><li>Java 提供了很多内置类库。如对多线程支持，对网络通信支持，最重要的一点是提供了垃圾回收器。</li><li>Java 具有较好的安全性和健壮性。Java 提供了异常处理和垃圾回收机制，去除了 C++中难以理解的指针特性。</li></ul><h3 id="jdk-与-jre-有什么区别" tabindex="-1"><a class="header-anchor" href="#jdk-与-jre-有什么区别" aria-hidden="true">#</a> JDK 与 JRE 有什么区别？</h3><ul><li>JDK：Java 开发工具包（Java Development Kit），提供了 Java 的开发环境和运行环境。</li><li>JRE：Java 运行环境(Java Runtime Environment)，提供了 Java 运行所需的环境。</li><li>JDK 包含了 JRE。如果只运行 Java 程序，安装 JRE 即可。要编写 Java 程序需安装 JDK.</li></ul><h3 id="简述-java-基本数据类型" tabindex="-1"><a class="header-anchor" href="#简述-java-基本数据类型" aria-hidden="true">#</a> 简述 Java 基本数据类型</h3><ul><li>byte: 占用 1 个字节，取值范围-128 ~ 127</li><li>short: 占用 2 个字节，取值范围-2^15^ ~ 2^15^-1</li><li>int：占用 4 个字节，取值范围-2^31^ ~ 2^31^-1</li><li>long：占用 8 个字节</li><li>float：占用 4 个字节</li><li>double：占用 8 个字节</li><li>char: 占用 2 个字节</li><li>boolean：占用大小根据实现虚拟机不同有所差异</li></ul><h3 id="简述自动装箱拆箱" tabindex="-1"><a class="header-anchor" href="#简述自动装箱拆箱" aria-hidden="true">#</a> 简述自动装箱拆箱</h3><p>对于 Java 基本数据类型，均对应一个包装类。</p><p>装箱就是自动将基本数据类型转换为包装器类型，如 int-&gt;Integer</p><p>拆箱就是自动将包装器类型转换为基本数据类型，如 Integer-&gt;int</p><h3 id="简述-java-访问修饰符" tabindex="-1"><a class="header-anchor" href="#简述-java-访问修饰符" aria-hidden="true">#</a> 简述 Java 访问修饰符</h3><ul><li>default: 默认访问修饰符，在同一包内可见</li><li>private: 在同一类内可见，不能修饰类</li><li>protected : 对同一包内的类和所有子类可见，不能修饰类</li><li>public: 对所有类可见</li></ul><h3 id="构造方法、成员变量初始化以及静态成员变量三者的初始化顺序" tabindex="-1"><a class="header-anchor" href="#构造方法、成员变量初始化以及静态成员变量三者的初始化顺序" aria-hidden="true">#</a> 构造方法、成员变量初始化以及静态成员变量三者的初始化顺序？</h3><p>先后顺序：静态成员变量、成员变量、构造方法。</p><p>详细的先后顺序：父类静态变量、父类静态代码块、子类静态变量、子类静态代码块、父类非静态变量、父类非静态代码块、父类构造函数、子类非静态变量、子类非静态代码块、子类构造函数。</p><h3 id="java-代码块执行顺序" tabindex="-1"><a class="header-anchor" href="#java-代码块执行顺序" aria-hidden="true">#</a> Java 代码块执行顺序</h3><ul><li>父类静态代码块（只执行一次）</li><li>子类静态代码块（只执行一次）</li><li>父类构造代码块</li><li>父类构造函数</li><li>子类构造代码块</li><li>子类构造函数</li><li>普通代码块</li></ul><h3 id="面向对象的三大特性" tabindex="-1"><a class="header-anchor" href="#面向对象的三大特性" aria-hidden="true">#</a> 面向对象的三大特性？</h3><p>继承：对象的一个新类可以从现有的类中派生，派生类可以从它的基类那继承方法和实例变量，且派生类可以修改或新增新的方法使之更适合特殊的需求。</p><p>封装：将客观事物抽象成类，每个类可以把自身数据和方法只让可信的类或对象操作，对不可信的进行信息隐藏。</p><p>多态：允许不同类的对象对同一消息作出响应。不同对象调用相同方法即使参数也相同，最终表现行为是不一样的。</p><h3 id="为什么-java-语言不支持多重继承" tabindex="-1"><a class="header-anchor" href="#为什么-java-语言不支持多重继承" aria-hidden="true">#</a> 为什么 Java 语言不支持多重继承？</h3><p>为了程序的结构能够更加清晰从而便于维护。假设 Java 语言支持多重继承，类 C 继承自类 A 和类 B，如果类 A 和 B 都有自定义的成员方法 <code>f()</code>，那么当代码中调用类 C 的 <code>f()</code> 会产生二义性。</p><p>Java 语言通过实现多个接口间接支持多重继承，接口由于只包含方法定义，不能有方法的实现，类 C 继承接口 A 与接口 B 时即使它们都有方法<code>f()</code>，也不能直接调用方法，需实现具体的<code>f()</code>方法才能调用，不会产生二义性。</p><p>多重继承会使类型转换、构造方法的调用顺序变得复杂，会影响到性能。</p><h3 id="简述-java-的多态" tabindex="-1"><a class="header-anchor" href="#简述-java-的多态" aria-hidden="true">#</a> 简述 Java 的多态</h3><p>Java 多态可以分为编译时多态和运行时多态。</p><p>编译时多态主要指方法的重载，即通过参数列表的不同来区分不同的方法。</p><p>运行时多态主要指继承父类和实现接口时，可使用父类引用指向子类对象。</p><p>运行时多态的实现：主要依靠方法表，方法表中最先存放的是 Object 类的方法，接下来是该类的父类的方法，最后是该类本身的方法。如果子类改写了父类的方法，那么子类和父类的那些同名方法共享一个方法表项，都被认作是父类的方法。因此可以实现运行时多态。</p><h3 id="java-提供的多态机制" tabindex="-1"><a class="header-anchor" href="#java-提供的多态机制" aria-hidden="true">#</a> Java 提供的多态机制？</h3><p>Java 提供了两种用于多态的机制，分别是重载与覆盖。</p><p>重载：重载是指同一个类中有多个同名的方法，但这些方法有不同的参数，在编译期间就可以确定调用哪个方法。</p><p>覆盖：覆盖是指派生类重写基类的方法，使用基类指向其子类的实例对象，或接口的引用变量指向其实现类的实例对象，在程序调用的运行期根据引用变量所指的具体实例对象调用正在运行的那个对象的方法，即需要到运行期才能确定调用哪个方法。</p><h3 id="重载与覆盖的区别" tabindex="-1"><a class="header-anchor" href="#重载与覆盖的区别" aria-hidden="true">#</a> 重载与覆盖的区别？</h3><ul><li>覆盖是父类与子类之间的关系，是垂直关系；重载是同一类中方法之间的关系，是水平关系。</li><li>覆盖只能由一个方法或一对方法产生关系；重载是多个方法之间的关系。</li><li>覆盖要求参数列表相同；重载要求参数列表不同。</li><li>覆盖中，调用方法体是根据对象的类型来决定的，而重载是根据调用时实参表与形参表来对应选择方法体。</li><li>重载方法可以改变返回值的类型，覆盖方法不能改变返回值的类型。</li></ul><h3 id="接口和抽象类的相同点和不同点" tabindex="-1"><a class="header-anchor" href="#接口和抽象类的相同点和不同点" aria-hidden="true">#</a> 接口和抽象类的相同点和不同点？</h3><p>相同点:</p><ul><li>都不能被实例化。</li><li>接口的实现类或抽象类的子类需实现接口或抽象类中相应的方法才能被实例化。</li></ul><p>不同点：</p><ul><li><p>接口只能有方法定义，不能有方法的实现，而抽象类可以有方法的定义与实现。</p></li><li><p>实现接口的关键字为 implements，继承抽象类的关键字为 extends。一个类可以实现多个接口，只能继承一个抽象类。</p></li><li><p>当子类和父类之间存在逻辑上的层次结构，推荐使用抽象类，有利于功能的累积。当功能不需要，希望支持差别较大的两个或更多对象间的特定交互行为，推荐使用接口。使用接口能降低软件系统的耦合度，便于日后维护或添加删除方法。</p></li></ul><h3 id="简述抽象类与接口的区别" tabindex="-1"><a class="header-anchor" href="#简述抽象类与接口的区别" aria-hidden="true">#</a> 简述抽象类与接口的区别</h3><p>抽象类：体现的是 is-a 的关系，如对于 man is a person，就可以将 person 定义为抽象类。</p><p>接口：体现的是 can 的关系。是作为模板实现的。如设置接口 fly，plane 类和 bird 类均可实现该接口。</p><p>一个类只能继承一个抽象类，但可以实现多个接口。</p><h3 id="简述内部类及其作用" tabindex="-1"><a class="header-anchor" href="#简述内部类及其作用" aria-hidden="true">#</a> 简述内部类及其作用</h3><ul><li>成员内部类：作为成员对象的内部类。可以访问 private 及以上外部类的属性和方法。外部类想要访问内部类属性或方法时，必须要创建一个内部类对象，然后通过该对象访问内部类的属性或方法。外部类也可访问 private 修饰的内部类属性。</li><li>局部内部类：存在于方法中的内部类。访问权限类似局部变量，只能访问外部类的 final 变量。</li><li>匿名内部类：只能使用一次，没有类名，只能访问外部类的 final 变量。</li><li>静态内部类：类似类的静态成员变量。</li></ul><h3 id="java-语言中关键字-static-的作用是什么" tabindex="-1"><a class="header-anchor" href="#java-语言中关键字-static-的作用是什么" aria-hidden="true">#</a> Java 语言中关键字 static 的作用是什么？</h3><p>static 的主要作用有两个：</p><ul><li>为某种特定数据类型或对象分配与创建对象个数无关的单一的存储空间。</li><li>使得某个方法或属性与类而不是对象关联在一起，即在不创建对象的情况下可通过类直接调用方法或使用类的属性。</li></ul><p>具体而言 static 又可分为 4 种使用方式：</p><ul><li>修饰成员变量。用 static 关键字修饰的静态变量在内存中只有一个副本。只要静态变量所在的类被加载，这个静态变量就会被分配空间，可以使用“类.静态变量”和“对象.静态变量”的方法使用。</li><li>修饰成员方法。static 修饰的方法无需创建对象就可以被调用。static 方法中不能使用 this 和 super 关键字，不能调用非 static 方法，只能访问所属类的静态成员变量和静态成员方法。</li><li>修饰代码块。JVM 在加载类的时候会执行 static 代码块。static 代码块常用于初始化静态变量。static 代码块只会被执行一次。</li><li>修饰内部类。static 内部类可以不依赖外部类实例对象而被实例化。静态内部类不能与外部类有相同的名字，不能访问普通成员变量，只能访问外部类中的静态成员和静态成员方法。</li></ul><h3 id="为什么要把-string-设计为不可变" tabindex="-1"><a class="header-anchor" href="#为什么要把-string-设计为不可变" aria-hidden="true">#</a> 为什么要把 String 设计为不可变？</h3><ul><li>节省空间：字符串常量存储在 JVM 的字符串池中可以被用户共享。</li><li>提高效率：String 可以被不同线程共享，是线程安全的。在涉及多线程操作中不需要同步操作。</li><li>安全：String 常被用于用户名、密码、文件名等使用，由于其不可变，可避免黑客行为对其恶意修改。</li></ul><h3 id="简述-string-stringbuffer-与-stringbuilder" tabindex="-1"><a class="header-anchor" href="#简述-string-stringbuffer-与-stringbuilder" aria-hidden="true">#</a> 简述 String/StringBuffer 与 StringBuilder</h3><p>String 类采用利用 final 修饰的字符数组进行字符串保存，因此不可变。如果对 String 类型对象修改，需要新建对象，将老字符和新增加的字符一并存进去。</p><p>StringBuilder，采用无 final 修饰的字符数组进行保存，因此可变。但线程不安全。</p><p>StringBuffer，采用无 final 修饰的字符数组进行保存，可理解为实现线程安全的 StringBuilder。</p><h3 id="判等运算符-与-equals-的区别" tabindex="-1"><a class="header-anchor" href="#判等运算符-与-equals-的区别" aria-hidden="true">#</a> 判等运算符==与 equals 的区别？</h3><p>== 比较的是引用，equals 比较的是内容。</p><p>如果变量是基础数据类型，== 用于比较其对应值是否相等。如果变量指向的是对象，== 用于比较两个对象是否指向同一块存储空间。</p><p>equals 是 Object 类提供的方法之一，每个 Java 类都继承自 Object 类，所以每个对象都具有 equals 这个方法。Object 类中定义的 equals 方法内部是直接调用 == 比较对象的。但通过覆盖的方法可以让它不是比较引用而是比较数据内容。</p><h3 id="简述-object-类常用方法" tabindex="-1"><a class="header-anchor" href="#简述-object-类常用方法" aria-hidden="true">#</a> 简述 Object 类常用方法</h3><ul><li>hashCode：通过对象计算出的散列码。用于 map 型或 equals 方法。需要保证同一个对象多次调用该方法，总返回相同的整型值。</li><li>equals：判断两个对象是否一致。需保证 equals 方法相同对应的对象 hashCode 也相同。</li><li>toString: 用字符串表示该对象</li><li>clone:深拷贝一个对象</li></ul><h3 id="java-中一维数组和二维数组的声明方式" tabindex="-1"><a class="header-anchor" href="#java-中一维数组和二维数组的声明方式" aria-hidden="true">#</a> Java 中一维数组和二维数组的声明方式？</h3><p>一维数组的声明方式：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code>type arrayName<span class="token punctuation">[</span><span class="token punctuation">]</span>
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href="/baguwen/java-basic.html#简述-java-的-treemap" class="router-link-active router-link-exact-active toc-link level3">简述 Java 的 TreeMap</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/baguwen/java-basic.html#arraylist、vector-和-linkedlist-有什么共同点与区别" class="router-link-active router-link-exact-active toc-link level3">ArrayList、Vector 和 LinkedList 有什么共同点与区别？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/baguwen/java-basic.html#hashmap-和-hashtable-有什么区别" class="router-link-active router-link-exact-active toc-link level3">HashMap 和 Hashtable 有什么区别？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/baguwen/java-basic.html#如何决定使用-hashmap-还是-treemap" class="router-link-active router-link-exact-active toc-link level3">如何决定使用 HashMap 还是 TreeMap?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/baguwen/java-basic.html#hashset-中-equals-与-hashcode-之间的关系" class="router-link-active router-link-exact-active toc-link level3">HashSet 中，equals 与 hashCode 之间的关系？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/baguwen/java-basic.html#fail-fast-和-fail-safe-迭代器的区别是什么" class="router-link-active router-link-exact-active toc-link level3">fail-fast 和 fail-safe 迭代器的区别是什么？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/baguwen/java-basic.html#collection-和-collections-有什么区别" class="router-link-active router-link-exact-active toc-link level3">Collection 和 Collections 有什么区别？</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="java-基础八股文-背诵版-必看" tabindex="-1"><a class="header-anchor" href="#java-基础八股文-背诵版-必看" aria-hidden="true">#</a> Java 基础八股文（背诵版）必看👍</h1><h3 id="java-语言具有哪些特点" tabindex="-1"><a class="header-anchor" href="#java-语言具有哪些特点" aria-hidden="true">#</a> Java 语言具有哪些特点？</h3><ul><li>Java 为纯面向对象的语言。它能够直接反应现实生活中的对象。</li><li>具有平台无关性。Java 利用 Java 虚拟机运行字节码，无论是在 Windows、Linux 还是 MacOS 等其它平台对 Java 程序进行编译，编译后的程序可在其它平台运行。</li><li>Java 为解释型语言，编译器把 Java 代码编译成平台无关的中间代码，然后在 JVM 上解释运行，具有很好的可移植性。</li><li>Java 提供了很多内置类库。如对多线程支持，对网络通信支持，最重要的一点是提供了垃圾回收器。</li><li>Java 具有较好的安全性和健壮性。Java 提供了异常处理和垃圾回收机制，去除了 C++中难以理解的指针特性。</li></ul><h3 id="jdk-与-jre-有什么区别" tabindex="-1"><a class="header-anchor" href="#jdk-与-jre-有什么区别" aria-hidden="true">#</a> JDK 与 JRE 有什么区别？</h3><ul><li>JDK：Java 开发工具包（Java Development Kit），提供了 Java 的开发环境和运行环境。</li><li>JRE：Java 运行环境(Java Runtime Environment)，提供了 Java 运行所需的环境。</li><li>JDK 包含了 JRE。如果只运行 Java 程序，安装 JRE 即可。要编写 Java 程序需安装 JDK.</li></ul><h3 id="简述-java-基本数据类型" tabindex="-1"><a class="header-anchor" href="#简述-java-基本数据类型" aria-hidden="true">#</a> 简述 Java 基本数据类型</h3><ul><li>byte: 占用 1 个字节，取值范围-128 ~ 127</li><li>short: 占用 2 个字节，取值范围-2^15^ ~ 2^15^-1</li><li>int：占用 4 个字节，取值范围-2^31^ ~ 2^31^-1</li><li>long：占用 8 个字节</li><li>float：占用 4 个字节</li><li>double：占用 8 个字节</li><li>char: 占用 2 个字节</li><li>boolean：占用大小根据实现虚拟机不同有所差异</li></ul><h3 id="简述自动装箱拆箱" tabindex="-1"><a class="header-anchor" href="#简述自动装箱拆箱" aria-hidden="true">#</a> 简述自动装箱拆箱</h3><p>对于 Java 基本数据类型，均对应一个包装类。</p><p>装箱就是自动将基本数据类型转换为包装器类型，如 int-&gt;Integer</p><p>拆箱就是自动将包装器类型转换为基本数据类型，如 Integer-&gt;int</p><h3 id="简述-java-访问修饰符" tabindex="-1"><a class="header-anchor" href="#简述-java-访问修饰符" aria-hidden="true">#</a> 简述 Java 访问修饰符</h3><ul><li>default: 默认访问修饰符，在同一包内可见</li><li>private: 在同一类内可见，不能修饰类</li><li>protected : 对同一包内的类和所有子类可见，不能修饰类</li><li>public: 对所有类可见</li></ul><h3 id="构造方法、成员变量初始化以及静态成员变量三者的初始化顺序" tabindex="-1"><a class="header-anchor" href="#构造方法、成员变量初始化以及静态成员变量三者的初始化顺序" aria-hidden="true">#</a> 构造方法、成员变量初始化以及静态成员变量三者的初始化顺序？</h3><p>先后顺序：静态成员变量、成员变量、构造方法。</p><p>详细的先后顺序：父类静态变量、父类静态代码块、子类静态变量、子类静态代码块、父类非静态变量、父类非静态代码块、父类构造函数、子类非静态变量、子类非静态代码块、子类构造函数。</p><h3 id="java-代码块执行顺序" tabindex="-1"><a class="header-anchor" href="#java-代码块执行顺序" aria-hidden="true">#</a> Java 代码块执行顺序</h3><ul><li>父类静态代码块（只执行一次）</li><li>子类静态代码块（只执行一次）</li><li>父类构造代码块</li><li>父类构造函数</li><li>子类构造代码块</li><li>子类构造函数</li><li>普通代码块</li></ul><h3 id="面向对象的三大特性" tabindex="-1"><a class="header-anchor" href="#面向对象的三大特性" aria-hidden="true">#</a> 面向对象的三大特性？</h3><p>继承：对象的一个新类可以从现有的类中派生，派生类可以从它的基类那继承方法和实例变量，且派生类可以修改或新增新的方法使之更适合特殊的需求。</p><p>封装：将客观事物抽象成类，每个类可以把自身数据和方法只让可信的类或对象操作，对不可信的进行信息隐藏。</p><p>多态：允许不同类的对象对同一消息作出响应。不同对象调用相同方法即使参数也相同，最终表现行为是不一样的。</p><h3 id="为什么-java-语言不支持多重继承" tabindex="-1"><a class="header-anchor" href="#为什么-java-语言不支持多重继承" aria-hidden="true">#</a> 为什么 Java 语言不支持多重继承？</h3><p>为了程序的结构能够更加清晰从而便于维护。假设 Java 语言支持多重继承，类 C 继承自类 A 和类 B，如果类 A 和 B 都有自定义的成员方法 <code>f()</code>，那么当代码中调用类 C 的 <code>f()</code> 会产生二义性。</p><p>Java 语言通过实现多个接口间接支持多重继承，接口由于只包含方法定义，不能有方法的实现，类 C 继承接口 A 与接口 B 时即使它们都有方法<code>f()</code>，也不能直接调用方法，需实现具体的<code>f()</code>方法才能调用，不会产生二义性。</p><p>多重继承会使类型转换、构造方法的调用顺序变得复杂，会影响到性能。</p><h3 id="简述-java-的多态" tabindex="-1"><a class="header-anchor" href="#简述-java-的多态" aria-hidden="true">#</a> 简述 Java 的多态</h3><p>Java 多态可以分为编译时多态和运行时多态。</p><p>编译时多态主要指方法的重载，即通过参数列表的不同来区分不同的方法。</p><p>运行时多态主要指继承父类和实现接口时，可使用父类引用指向子类对象。</p><p>运行时多态的实现：主要依靠方法表，方法表中最先存放的是 Object 类的方法，接下来是该类的父类的方法，最后是该类本身的方法。如果子类改写了父类的方法，那么子类和父类的那些同名方法共享一个方法表项，都被认作是父类的方法。因此可以实现运行时多态。</p><h3 id="java-提供的多态机制" tabindex="-1"><a class="header-anchor" href="#java-提供的多态机制" aria-hidden="true">#</a> Java 提供的多态机制？</h3><p>Java 提供了两种用于多态的机制，分别是重载与覆盖。</p><p>重载：重载是指同一个类中有多个同名的方法，但这些方法有不同的参数，在编译期间就可以确定调用哪个方法。</p><p>覆盖：覆盖是指派生类重写基类的方法，使用基类指向其子类的实例对象，或接口的引用变量指向其实现类的实例对象，在程序调用的运行期根据引用变量所指的具体实例对象调用正在运行的那个对象的方法，即需要到运行期才能确定调用哪个方法。</p><h3 id="重载与覆盖的区别" tabindex="-1"><a class="header-anchor" href="#重载与覆盖的区别" aria-hidden="true">#</a> 重载与覆盖的区别？</h3><ul><li>覆盖是父类与子类之间的关系，是垂直关系；重载是同一类中方法之间的关系，是水平关系。</li><li>覆盖只能由一个方法或一对方法产生关系；重载是多个方法之间的关系。</li><li>覆盖要求参数列表相同；重载要求参数列表不同。</li><li>覆盖中，调用方法体是根据对象的类型来决定的，而重载是根据调用时实参表与形参表来对应选择方法体。</li><li>重载方法可以改变返回值的类型，覆盖方法不能改变返回值的类型。</li></ul><h3 id="接口和抽象类的相同点和不同点" tabindex="-1"><a class="header-anchor" href="#接口和抽象类的相同点和不同点" aria-hidden="true">#</a> 接口和抽象类的相同点和不同点？</h3><p>相同点:</p><ul><li>都不能被实例化。</li><li>接口的实现类或抽象类的子类需实现接口或抽象类中相应的方法才能被实例化。</li></ul><p>不同点：</p><ul><li><p>接口只能有方法定义，不能有方法的实现，而抽象类可以有方法的定义与实现。</p></li><li><p>实现接口的关键字为 implements，继承抽象类的关键字为 extends。一个类可以实现多个接口，只能继承一个抽象类。</p></li><li><p>当子类和父类之间存在逻辑上的层次结构，推荐使用抽象类，有利于功能的累积。当功能不需要，希望支持差别较大的两个或更多对象间的特定交互行为，推荐使用接口。使用接口能降低软件系统的耦合度，便于日后维护或添加删除方法。</p></li></ul><h3 id="简述抽象类与接口的区别" tabindex="-1"><a class="header-anchor" href="#简述抽象类与接口的区别" aria-hidden="true">#</a> 简述抽象类与接口的区别</h3><p>抽象类：体现的是 is-a 的关系，如对于 man is a person，就可以将 person 定义为抽象类。</p><p>接口：体现的是 can 的关系。是作为模板实现的。如设置接口 fly，plane 类和 bird 类均可实现该接口。</p><p>一个类只能继承一个抽象类，但可以实现多个接口。</p><h3 id="简述内部类及其作用" tabindex="-1"><a class="header-anchor" href="#简述内部类及其作用" aria-hidden="true">#</a> 简述内部类及其作用</h3><ul><li>成员内部类：作为成员对象的内部类。可以访问 private 及以上外部类的属性和方法。外部类想要访问内部类属性或方法时，必须要创建一个内部类对象，然后通过该对象访问内部类的属性或方法。外部类也可访问 private 修饰的内部类属性。</li><li>局部内部类：存在于方法中的内部类。访问权限类似局部变量，只能访问外部类的 final 变量。</li><li>匿名内部类：只能使用一次，没有类名，只能访问外部类的 final 变量。</li><li>静态内部类：类似类的静态成员变量。</li></ul><h3 id="java-语言中关键字-static-的作用是什么" tabindex="-1"><a class="header-anchor" href="#java-语言中关键字-static-的作用是什么" aria-hidden="true">#</a> Java 语言中关键字 static 的作用是什么？</h3><p>static 的主要作用有两个：</p><ul><li>为某种特定数据类型或对象分配与创建对象个数无关的单一的存储空间。</li><li>使得某个方法或属性与类而不是对象关联在一起，即在不创建对象的情况下可通过类直接调用方法或使用类的属性。</li></ul><p>具体而言 static 又可分为 4 种使用方式：</p><ul><li>修饰成员变量。用 static 关键字修饰的静态变量在内存中只有一个副本。只要静态变量所在的类被加载，这个静态变量就会被分配空间，可以使用“类.静态变量”和“对象.静态变量”的方法使用。</li><li>修饰成员方法。static 修饰的方法无需创建对象就可以被调用。static 方法中不能使用 this 和 super 关键字，不能调用非 static 方法，只能访问所属类的静态成员变量和静态成员方法。</li><li>修饰代码块。JVM 在加载类的时候会执行 static 代码块。static 代码块常用于初始化静态变量。static 代码块只会被执行一次。</li><li>修饰内部类。static 内部类可以不依赖外部类实例对象而被实例化。静态内部类不能与外部类有相同的名字，不能访问普通成员变量，只能访问外部类中的静态成员和静态成员方法。</li></ul><h3 id="为什么要把-string-设计为不可变" tabindex="-1"><a class="header-anchor" href="#为什么要把-string-设计为不可变" aria-hidden="true">#</a> 为什么要把 String 设计为不可变？</h3><ul><li>节省空间：字符串常量存储在 JVM 的字符串池中可以被用户共享。</li><li>提高效率：String 可以被不同线程共享，是线程安全的。在涉及多线程操作中不需要同步操作。</li><li>安全：String 常被用于用户名、密码、文件名等使用，由于其不可变，可避免黑客行为对其恶意修改。</li></ul><h3 id="简述-string-stringbuffer-与-stringbuilder" tabindex="-1"><a class="header-anchor" href="#简述-string-stringbuffer-与-stringbuilder" aria-hidden="true">#</a> 简述 String/StringBuffer 与 StringBuilder</h3><p>String 类采用利用 final 修饰的字符数组进行字符串保存，因此不可变。如果对 String 类型对象修改，需要新建对象，将老字符和新增加的字符一并存进去。</p><p>StringBuilder，采用无 final 修饰的字符数组进行保存，因此可变。但线程不安全。</p><p>StringBuffer，采用无 final 修饰的字符数组进行保存，可理解为实现线程安全的 StringBuilder。</p><h3 id="判等运算符-与-equals-的区别" tabindex="-1"><a class="header-anchor" href="#判等运算符-与-equals-的区别" aria-hidden="true">#</a> 判等运算符==与 equals 的区别？</h3><p>== 比较的是引用，equals 比较的是内容。</p><p>如果变量是基础数据类型，== 用于比较其对应值是否相等。如果变量指向的是对象，== 用于比较两个对象是否指向同一块存储空间。</p><p>equals 是 Object 类提供的方法之一，每个 Java 类都继承自 Object 类，所以每个对象都具有 equals 这个方法。Object 类中定义的 equals 方法内部是直接调用 == 比较对象的。但通过覆盖的方法可以让它不是比较引用而是比较数据内容。</p><h3 id="简述-object-类常用方法" tabindex="-1"><a class="header-anchor" href="#简述-object-类常用方法" aria-hidden="true">#</a> 简述 Object 类常用方法</h3><ul><li>hashCode：通过对象计算出的散列码。用于 map 型或 equals 方法。需要保证同一个对象多次调用该方法，总返回相同的整型值。</li><li>equals：判断两个对象是否一致。需保证 equals 方法相同对应的对象 hashCode 也相同。</li><li>toString: 用字符串表示该对象</li><li>clone:深拷贝一个对象</li></ul><h3 id="java-中一维数组和二维数组的声明方式" tabindex="-1"><a class="header-anchor" href="#java-中一维数组和二维数组的声明方式" aria-hidden="true">#</a> Java 中一维数组和二维数组的声明方式？</h3><p>一维数组的声明方式：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code>type arrayName<span class="token punctuation">[</span><span class="token punctuation">]</span>
 type<span class="token punctuation">[</span><span class="token punctuation">]</span> arrayName
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><p>二维数组的声明方式：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code>type arrayName<span class="token punctuation">[</span><span class="token punctuation">]</span><span class="token punctuation">[</span><span class="token punctuation">]</span>
 type<span class="token punctuation">[</span><span class="token punctuation">]</span><span class="token punctuation">[</span><span class="token punctuation">]</span> arrayName
@@ -51,6 +51,6 @@ type<span class="token punctuation">[</span><span class="token punctuation">]</s
 实例对象<span class="token punctuation">.</span><span class="token function">getClass</span><span class="token punctuation">(</span><span class="token punctuation">)</span>
 类名<span class="token punctuation">.</span><span class="token keyword">class</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="java-反射机制是什么" tabindex="-1"><a class="header-anchor" href="#java-反射机制是什么" aria-hidden="true">#</a> Java 反射机制是什么？</h3><p>Java 反射机制是指在程序的运行过程中可以构造任意一个类的对象、获取任意一个类的成员变量和成员方法、获取任意一个对象所属的类信息、调用任意一个对象的属性和方法。反射机制使得 Java 具有动态获取程序信息和动态调用对象方法的能力。可以通过以下类调用反射 API。</p><ul><li>Class 类：可获得类属性方法</li><li>Field 类：获得类的成员变量</li><li>Method 类：获取类的方法信息</li><li>Construct 类：获取类的构造方法等信息</li></ul><h3 id="序列化是什么" tabindex="-1"><a class="header-anchor" href="#序列化是什么" aria-hidden="true">#</a> 序列化是什么？</h3><p>序列化是一种将对象转换成字节序列的过程，用于解决在对对象流进行读写操作时所引发的问题。序列化可以将对象的状态写在流里进行网络传输，或者保存到文件、数据库等系统里，并在需要的时候把该流读取出来重新构造成一个相同的对象。</p><h3 id="简述-java-序列化与反序列化的实现" tabindex="-1"><a class="header-anchor" href="#简述-java-序列化与反序列化的实现" aria-hidden="true">#</a> 简述 Java 序列化与反序列化的实现</h3><p>序列化：将 java 对象转化为字节序列，由此可以通过网络对象进行传输。</p><p>反序列化：将字节序列转化为 java 对象。</p><p>具体实现：实现 Serializable 接口，或实现 Externalizable 接口中的 writeExternal()与 readExternal()方法。</p><h3 id="简述-java-的-list" tabindex="-1"><a class="header-anchor" href="#简述-java-的-list" aria-hidden="true">#</a> 简述 Java 的 List</h3><p>List 是一个有序队列，在 Java 中有两种实现方式:</p><p>ArrayList 使用数组实现，是容量可变的非线程安全列表，随机访问快，集合扩容时会创建更大的数组，把原有数组复制到新数组。</p><p>LinkedList 本质是双向链表，与 ArrayList 相比插入和删除速度更快，但随机访问元素很慢。</p><h3 id="java-中线程安全的基本数据结构有哪些" tabindex="-1"><a class="header-anchor" href="#java-中线程安全的基本数据结构有哪些" aria-hidden="true">#</a> Java 中线程安全的基本数据结构有哪些</h3><ul><li>HashTable: 哈希表的线程安全版，效率低</li><li>ConcurrentHashMap：哈希表的线程安全版，效率高，用于替代 HashTable</li><li>Vector：线程安全版 Arraylist</li><li>Stack：线程安全版栈</li><li>BlockingQueue 及其子类：线程安全版队列</li></ul><h3 id="简述-java-的-set" tabindex="-1"><a class="header-anchor" href="#简述-java-的-set" aria-hidden="true">#</a> 简述 Java 的 Set</h3><p>Set 即集合，该数据结构不允许元素重复且无序。Java 对 Set 有三种实现方式：</p><p>HashSet 通过 HashMap 实现，HashMap 的 Key 即 HashSet 存储的元素，Value 系统自定义一个名为 PRESENT 的 Object 类型常量。判断元素是否相同时，先比较 hashCode，相同后再利用 equals 比较，查询 O(1)</p><p>LinkedHashSet 继承自 HashSet，通过 LinkedHashMap 实现，使用双向链表维护元素插入顺序。</p><p>TreeSet 通过 TreeMap 实现的，底层数据结构是红黑树，添加元素到集合时按照比较规则将其插入合适的位置，保证插入后的集合仍然有序。查询 O(logn)</p><h3 id="简述-java-的-hashmap" tabindex="-1"><a class="header-anchor" href="#简述-java-的-hashmap" aria-hidden="true">#</a> 简述 Java 的 HashMap</h3><p>JDK8 之前底层实现是数组 + 链表，JDK8 改为数组 + 链表/红黑树。主要成员变量包括存储数据的 table 数组、元素数量 size、加载因子 loadFactor。HashMap 中数据以键值对的形式存在，键对应的 hash 值用来计算数组下标，如果两个元素 key 的 hash 值一样，就会发生哈希冲突，被放到同一个链表上。</p><p>table 数组记录 HashMap 的数据，每个下标对应一条链表，所有哈希冲突的数据都会被存放到同一条链表，Node/Entry 节点包含四个成员变量：key、value、next 指针和 hash 值。在 JDK8 后链表超过 8 会转化为红黑树。</p><p>若当前数据/总数据容量&gt;负载因子，Hashmap 将执行扩容操作。默认初始化容量为 16，扩容容量必须是 2 的幂次方、最大容量为 1&lt;&lt; 30 、默认加载因子为 0.75。</p><h3 id="为何-hashmap-线程不安全" tabindex="-1"><a class="header-anchor" href="#为何-hashmap-线程不安全" aria-hidden="true">#</a> 为何 HashMap 线程不安全</h3><p>在 JDK1.7 中，HashMap 采用头插法插入元素，因此并发情况下会导致环形链表，产生死循环。</p><p>虽然 JDK1.8 采用了尾插法解决了这个问题，但是并发下的 put 操作也会使前一个 key 被后一个 key 覆盖。</p><p>由于 HashMap 有扩容机制存在，也存在 A 线程进行扩容后，B 线程执行 get 方法出现失误的情况。</p><h3 id="简述-java-的-treemap" tabindex="-1"><a class="header-anchor" href="#简述-java-的-treemap" aria-hidden="true">#</a> 简述 Java 的 TreeMap</h3><p>TreeMap 是底层利用红黑树实现的 Map 结构，底层实现是一棵平衡的排序二叉树，由于红黑树的插入、删除、遍历时间复杂度都为 O(logN)，所以性能上低于哈希表。但是哈希表无法提供键值对的有序输出，红黑树可以按照键的值的大小有序输出。</p><h3 id="arraylist、vector-和-linkedlist-有什么共同点与区别" tabindex="-1"><a class="header-anchor" href="#arraylist、vector-和-linkedlist-有什么共同点与区别" aria-hidden="true">#</a> ArrayList、Vector 和 LinkedList 有什么共同点与区别？</h3><ul><li>ArrayList、Vector 和 LinkedList 都是可伸缩的数组，即可以动态改变长度的数组。</li><li>ArrayList 和 Vector 都是基于存储元素的 Object[] array 来实现的，它们会在内存中开辟一块连续的空间来存储，支持下标、索引访问。但在涉及插入元素时可能需要移动容器中的元素，插入效率较低。当存储元素超过容器的初始化容量大小，ArrayList 与 Vector 均会进行扩容。</li><li>Vector 是线程安全的，其大部分方法是直接或间接同步的。ArrayList 不是线程安全的，其方法不具有同步性质。LinkedList 也不是线程安全的。</li><li>LinkedList 采用双向列表实现，对数据索引需要从头开始遍历，因此随机访问效率较低，但在插入元素的时候不需要对数据进行移动，插入效率较高。</li></ul><h3 id="hashmap-和-hashtable-有什么区别" tabindex="-1"><a class="header-anchor" href="#hashmap-和-hashtable-有什么区别" aria-hidden="true">#</a> HashMap 和 Hashtable 有什么区别？</h3><ul><li>HashMap 是 Hashtable 的轻量级实现，HashMap 允许 key 和 value 为 null，但最多允许一条记录的 key 为 null.而 HashTable 不允许。</li><li>HashTable 中的方法是线程安全的，而 HashMap 不是。在多线程访问 HashMap 需要提供额外的同步机制。</li><li>Hashtable 使用 Enumeration 进行遍历，HashMap 使用 Iterator 进行遍历。</li></ul><h3 id="如何决定使用-hashmap-还是-treemap" tabindex="-1"><a class="header-anchor" href="#如何决定使用-hashmap-还是-treemap" aria-hidden="true">#</a> 如何决定使用 HashMap 还是 TreeMap?</h3><p>如果对 Map 进行插入、删除或定位一个元素的操作更频繁，HashMap 是更好的选择。如果需要对 key 集合进行有序的遍历，TreeMap 是更好的选择。</p><h3 id="hashset-中-equals-与-hashcode-之间的关系" tabindex="-1"><a class="header-anchor" href="#hashset-中-equals-与-hashcode-之间的关系" aria-hidden="true">#</a> HashSet 中，equals 与 hashCode 之间的关系？</h3><p>equals 和 hashCode 这两个方法都是从 object 类中继承过来的，equals 主要用于判断对象的内存地址引用是否是同一个地址；hashCode 根据定义的哈希规则将对象的内存地址转换为一个哈希码。HashSet 中存储的元素是不能重复的，主要通过 hashCode 与 equals 两个方法来判断存储的对象是否相同：</p><ul><li>如果两个对象的 hashCode 值不同，说明两个对象不相同。</li><li>如果两个对象的 hashCode 值相同，接着会调用对象的 equals 方法，如果 equlas 方法的返回结果为 true，那么说明两个对象相同，否则不相同。</li></ul><h3 id="fail-fast-和-fail-safe-迭代器的区别是什么" tabindex="-1"><a class="header-anchor" href="#fail-fast-和-fail-safe-迭代器的区别是什么" aria-hidden="true">#</a> fail-fast 和 fail-safe 迭代器的区别是什么？</h3><ul><li>fail-fast 直接在容器上进行，在遍历过程中，一旦发现容器中的数据被修改，就会立刻抛出 ConcurrentModificationException 异常从而导致遍历失败。常见的使用 fail-fast 方式的容器有 HashMap 和 ArrayList 等。</li><li>fail-safe 这种遍历基于容器的一个克隆。因此对容器中的内容修改不影响遍历。常见的使用 fail-safe 方式遍历的容器有 ConcurrentHashMap 和 CopyOnWriteArrayList。</li></ul><h3 id="collection-和-collections-有什么区别" tabindex="-1"><a class="header-anchor" href="#collection-和-collections-有什么区别" aria-hidden="true">#</a> Collection 和 Collections 有什么区别？</h3><ul><li>Collection 是一个集合接口，它提供了对集合对象进行基本操作的通用接口方法，所有集合都是它的子类，比如 List、Set 等。</li><li>Collections 是一个包装类，包含了很多静态方法、不能被实例化，而是作为工具类使用，比如提供的排序方法：Collections.sort(list);提供的反转方法：Collections.reverse(list)。</li></ul><hr><p>投稿作者：后端技术小牛说 转载链接：<a 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class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java 并发编程八股文（背诵版）必看👍</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2021年12月3日</span><meta property="datePublished" content="2021-12-03T03:32:08.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 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data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag7" role>背诵版八股文</li></ul><meta property="keywords" content="背诵版八股文"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer 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class="router-link-active router-link-exact-active toc-link level3">简述AQS</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="java-并发编程八股文-背诵版-必看" tabindex="-1"><a class="header-anchor" href="#java-并发编程八股文-背诵版-必看" aria-hidden="true">#</a> Java 并发编程八股文（背诵版）必看👍</h1><h3 id="简述java内存模型-jmm" tabindex="-1"><a class="header-anchor" href="#简述java内存模型-jmm" aria-hidden="true">#</a> 简述Java内存模型（JMM）</h3><p>Java内存模型定义了程序中各种变量的访问规则：</p><ul><li>所有变量都存储在主存，每个线程都有自己的工作内存。</li><li>工作内存中保存了被该线程使用的变量的主存副本，线程对变量的所有操作都必须在工作空间进行，不能直接读写主内存数据。</li><li>操作完成后，线程的工作内存通过缓存一致性协议将操作完的数据刷回主存。</li></ul><h3 id="简述as-if-serial" tabindex="-1"><a class="header-anchor" href="#简述as-if-serial" aria-hidden="true">#</a> 简述as-if-serial</h3><p>编译器会对原始的程序进行指令重排序和优化。但不管怎么重排序，其结果都必须和用户原始程序输出的预定结果保持一致。</p><h3 id="简述happens-before八大规则" tabindex="-1"><a class="header-anchor" href="#简述happens-before八大规则" aria-hidden="true">#</a> 简述happens-before八大规则</h3><ul><li>程序次序规则：一个线程内，按照代码顺序，书写在前面的操作先行发生于书写在后面的操作；</li><li>锁定规则：一个unLock操作先行发生于后面对同一个锁的lock操作；</li><li>volatile变量规则：对一个变量的写操作先行发生于后面对这个变量的读操作；</li><li>传递规则：如果操作A先行发生于操作B，而操作B又先行发生于操作C，则可以得出操作A先行发生于操作C；</li><li>线程启动规则：Thread对象的start()方法先行发生于此线程的每个一个动作；</li><li>线程中断规则：对线程interrupt()方法的调用先行发生于被中断线程的代码检测到中断事件的发生；</li><li>线程终结规则：线程中所有的操作都先行发生于线程的终止检测，我们可以通过Thread.join()方法结束、Thread.isAlive()的返回值手段检测到线程已经终止执行；</li><li>对象终结规则：一个对象的初始化完成先行发生于他的finalize()方法的开始；</li></ul><h3 id="as-if-serial-和-happens-before-的区别" tabindex="-1"><a class="header-anchor" href="#as-if-serial-和-happens-before-的区别" aria-hidden="true">#</a> as-if-serial 和 happens-before 的区别</h3><p>as-if-serial 保证单线程程序的执行结果不变，happens-before 保证正确同步的多线程程序的执行结果不变。</p><h3 id="简述原子性操作" tabindex="-1"><a class="header-anchor" href="#简述原子性操作" aria-hidden="true">#</a> 简述原子性操作</h3><p>一个操作或者多个操作，要么全部执行并且执行的过程不会被任何因素打断，要么就都不执行，这就是原子性操作。</p><h3 id="简述线程的可见性" tabindex="-1"><a class="header-anchor" href="#简述线程的可见性" aria-hidden="true">#</a> 简述线程的可见性</h3><p>可见性指当一个线程修改了共享变量时，其他线程能够立即得知修改。volatile、synchronized、final 关键字都能保证可见性。</p><h3 id="简述有序性" tabindex="-1"><a class="header-anchor" href="#简述有序性" aria-hidden="true">#</a> 简述有序性</h3><p>虽然多线程存在并发和指令优化等操作，但在本线程内观察该线程的所有执行操作是有序的。</p><h3 id="简述java中volatile关键字作用" tabindex="-1"><a class="header-anchor" href="#简述java中volatile关键字作用" aria-hidden="true">#</a> 简述Java中volatile关键字作用</h3><ul><li>保证变量对所有线程的可见性。当一个线程修改了变量值，新值对于其他线程来说是立即可以得知的。</li><li>禁止指令重排。使用 volatile 变量进行写操作，编译器在生成字节码时，会在指令序列中插入内存屏障来禁止特定类型的处理器进行重排序。</li></ul><h3 id="java线程的实现方式" tabindex="-1"><a class="header-anchor" href="#java线程的实现方式" aria-hidden="true">#</a> Java线程的实现方式</h3><ul><li>实现Runnable接口</li><li>继承Thread类</li><li>实现Callable接口</li></ul><h3 id="简述java线程的状态" tabindex="-1"><a class="header-anchor" href="#简述java线程的状态" aria-hidden="true">#</a> 简述Java线程的状态</h3><p>线程状态有 NEW、RUNNABLE、BLOCK、WAITING、TIMED_WAITING、THERMINATED</p><ul><li>NEW：新建状态，线程被创建且未启动，此时还未调用 start 方法。</li><li>RUNNABLE：运行状态。表示线程正在JVM中执行，但是这个执行，不一定真的在跑，也可能在排队等CPU。</li><li>BLOCKED：阻塞状态。线程等待获取锁，锁还没获得。</li><li>WAITING：等待状态。线程内run方法执行完Object.wait()/Thread.join()进入该状态。</li><li>TIMED_WAITING：限期等待。在一定时间之后跳出状态。调用Thread.sleep(long) Object.wait(long) Thread.join(long)进入状态。其中这些参数代表等待的时间。</li><li>TERMINATED：结束状态。线程调用完run方法进入该状态。</li></ul><h3 id="简述线程通信的方式" tabindex="-1"><a class="header-anchor" href="#简述线程通信的方式" aria-hidden="true">#</a> 简述线程通信的方式</h3><ul><li>volatile 关键词修饰变量，保证所有线程对变量访问的可见性。</li><li>synchronized关键词。确保多个线程在同一时刻只能有一个处于方法或同步块中。</li><li>wait/notify方法</li><li>IO通信</li></ul><h3 id="简述线程池" tabindex="-1"><a class="header-anchor" href="#简述线程池" aria-hidden="true">#</a> 简述线程池</h3><p>没有线程池的情况下，多次创建，销毁线程开销比较大。如果在开辟的线程执行完当前任务后复用已创建的线程，可以降低开销、控制最大并发数。</p><p>线程池创建线程时，会将线程封装成工作线程 Worker，Worker 在执行完任务后还会循环获取工作队列中的任务来执行。</p><p>将任务派发给线程池时，会出现以下几种情况</p><ul><li>核心线程池未满，创建一个新的线程执行任务。</li><li>如果核心线程池已满，工作队列未满，将线程存储在工作队列。</li><li>如果工作队列已满，线程数小于最大线程数就创建一个新线程处理任务。</li><li>如果超过大小线程数，按照拒绝策略来处理任务。</li></ul><p>线程池参数：</p><ul><li>corePoolSize：常驻核心线程数。超过该值后如果线程空闲会被销毁。</li><li>maximumPoolSize：线程池能够容纳同时执行的线程最大数。</li><li>keepAliveTime：线程空闲时间，线程空闲时间达到该值后会被销毁，直到只剩下 corePoolSize 个线程为止，避免浪费内存资源。</li><li>workQueue：工作队列。</li><li>threadFactory：线程工厂，用来生产一组相同任务的线程。</li><li>handler：拒绝策略。</li></ul><p>拒绝策略有以下几种：</p><ul><li>AbortPolicy：丢弃任务并抛出异常</li><li>CallerRunsPolicy：重新尝试提交该任务</li><li>DiscardOldestPolicy 抛弃队列里等待最久的任务并把当前任务加入队列</li><li>DiscardPolicy 表示直接抛弃当前任务但不抛出异常。</li></ul><h3 id="简述executor框架" tabindex="-1"><a class="header-anchor" href="#简述executor框架" aria-hidden="true">#</a> 简述Executor框架</h3><p>Executor框架目的是将任务提交和任务如何运行分离开来的机制。用户不再需要从代码层考虑设计任务的提交运行，只需要调用Executor框架实现类的Execute方法就可以提交任务。</p><h3 id="简述executor的继承关系" tabindex="-1"><a class="header-anchor" href="#简述executor的继承关系" aria-hidden="true">#</a> 简述Executor的继承关系</h3><ul><li>Executor：一个接口，其定义了一个接收Runnable对象的方法executor，该方法接收一个Runable实例执行这个任务。</li><li>ExecutorService：Executor的子类接口，其定义了一个接收Callable对象的方法，返回 Future 对象，同时提供execute方法。</li><li>ScheduledExecutorService：ExecutorService的子类接口，支持定期执行任务。</li><li>AbstractExecutorService：抽象类，提供 ExecutorService 执行方法的默认实现。</li><li>Executors：实现ExecutorService接口的静态工厂类，提供了一系列工厂方法用于创建线程池。</li><li>ThreadPoolExecutor：继承AbstractExecutorService，用于创建线程池。</li><li>ForkJoinPool: 继承AbstractExecutorService，Fork 将大任务分叉为多个小任务，然后让小任务执行，Join 是获得小任务的结果，类似于map reduce。</li><li>ThreadPoolExecutor：继承ThreadPoolExecutor，实现ScheduledExecutorService，用于创建带定时任务的线程池。</li></ul><h3 id="简述线程池的状态" tabindex="-1"><a class="header-anchor" href="#简述线程池的状态" aria-hidden="true">#</a> 简述线程池的状态</h3><ul><li>Running：能接受新提交的任务，也可以处理阻塞队列的任务。</li><li>Shutdown：不再接受新提交的任务，但可以处理存量任务，线程池处于running时调用shutdown方法，会进入该状态。</li><li>Stop：不接受新任务，不处理存量任务，调用shutdownnow进入该状态。</li><li>Tidying：所有任务已经终止了，worker_count（有效线程数）为0。</li><li>Terminated：线程池彻底终止。在tidying模式下调用terminated方法会进入该状态。</li></ul><h3 id="简述线程池类型" tabindex="-1"><a class="header-anchor" href="#简述线程池类型" aria-hidden="true">#</a> 简述线程池类型</h3><ul><li>newCachedThreadPool 可缓存线程池，可设置最小线程数和最大线程数，线程空闲1分钟后自动销毁。</li><li>newFixedThreadPool 指定工作线程数量线程池。</li><li>newSingleThreadExecutor 单线程Executor。</li><li>newScheduleThreadPool 支持定时任务的指定工作线程数量线程池。</li><li>newSingleThreadScheduledExecutor 支持定时任务的单线程Executor。</li></ul><h3 id="简述阻塞队列" tabindex="-1"><a class="header-anchor" href="#简述阻塞队列" aria-hidden="true">#</a> 简述阻塞队列</h3><p>阻塞队列是生产者消费者的实现具体组件之一。当阻塞队列为空时，从队列中获取元素的操作将会被阻塞，当阻塞队列满了，往队列添加元素的操作将会被阻塞。具体实现有：</p><ul><li>ArrayBlockingQueue：底层是由数组组成的有界阻塞队列。</li><li>LinkedBlockingQueue：底层是由链表组成的有界阻塞队列。</li><li>PriorityBlockingQueue：阻塞优先队列。</li><li>DelayQueue：创建元素时可以指定多久才能从队列中获取当前元素</li><li>SynchronousQueue：不存储元素的阻塞队列，每一个存储必须等待一个取出操作</li><li>LinkedTransferQueue：与LinkedBlockingQueue相比多一个transfer方法，即如果当前有消费者正等待接收元素，可以把生产者传入的元素立刻传输给消费者。</li><li>LinkedBlockingDeque：双向阻塞队列。</li></ul><h3 id="谈一谈threadlocal" tabindex="-1"><a class="header-anchor" href="#谈一谈threadlocal" aria-hidden="true">#</a> 谈一谈ThreadLocal</h3><p>ThreadLocal 是线程共享变量。ThreadLoacl 有一个静态内部类 ThreadLocalMap，其 Key 是 ThreadLocal 对象，值是 Entry 对象，ThreadLocalMap是每个线程私有的。</p><ul><li>set 给ThreadLocalMap设置值。</li><li>get 获取ThreadLocalMap。</li><li>remove 删除ThreadLocalMap类型的对象。</li></ul><p>存在的问题：对于线程池，由于线程池会重用 Thread 对象，因此与 Thread 绑定的 ThreadLocal 也会被重用，造成一系列问题。</p><p>比如说内存泄漏。由于 ThreadLocal 是弱引用，但 Entry 的 value 是强引用，因此当 ThreadLocal 被垃圾回收后，value 依旧不会被释放，产生内存泄漏。</p><h3 id="聊聊你对java并发包下unsafe类的理解" tabindex="-1"><a class="header-anchor" href="#聊聊你对java并发包下unsafe类的理解" aria-hidden="true">#</a> 聊聊你对Java并发包下unsafe类的理解</h3><p>对于 Java 语言，没有直接的指针组件，一般也不能使用偏移量对某块内存进行操作。这些操作相对来讲是安全（safe）的。</p><p>Java 有个类叫 Unsafe 类，这个类使 Java 拥有了像 C 语言的指针一样操作内存空间的能力，同时也带来了指针的问题。这个类可以说是 Java 并发开发的基础。</p><h3 id="java中的乐观锁与cas算法" tabindex="-1"><a class="header-anchor" href="#java中的乐观锁与cas算法" aria-hidden="true">#</a> Java中的乐观锁与CAS算法</h3><p>乐观锁认为数据发送时发生并发冲突的概率不大，所以读操作前不上锁。</p><p>到了写操作时才会进行判断，数据在此期间是否被其他线程修改。如果发生修改，那就返回写入失败；如果没有被修改，那就执行修改操作，返回修改成功。</p><p>乐观锁一般都采用 Compare And Swap（CAS）算法进行实现。顾名思义，该算法涉及到了两个操作，比较（Compare）和交换（Swap）。</p><p>CAS 算法的思路如下：</p><ul><li>该算法认为不同线程对变量的操作时产生竞争的情况比较少。</li><li>该算法的核心是对当前读取变量值 E 和内存中的变量旧值 V 进行比较。</li><li>如果相等，就代表其他线程没有对该变量进行修改，就将变量值更新为新值 N。</li><li>如果不等，就认为在读取值 E 到比较阶段，有其他线程对变量进行过修改，不进行任何操作。</li></ul><h3 id="aba问题及解决方法简述" tabindex="-1"><a class="header-anchor" href="#aba问题及解决方法简述" aria-hidden="true">#</a> ABA问题及解决方法简述</h3><p>CAS 算法是基于值来做比较的，如果当前有两个线程，一个线程将变量值从 A 改为 B ，再由 B 改回为 A ，当前线程开始执行 CAS 算法时，就很容易认为值没有变化，误认为读取数据到执行 CAS 算法的期间，没有线程修改过数据。</p><p>juc 包提供了一个 AtomicStampedReference，即在原始的版本下加入版本号戳，解决 ABA 问题。</p><h3 id="简述常见的atomic类" tabindex="-1"><a class="header-anchor" href="#简述常见的atomic类" aria-hidden="true">#</a> 简述常见的Atomic类</h3><p>在很多时候，我们需要的仅仅是一个简单的、高效的、线程安全的++或者--方案，使用synchronized关键字和lock固然可以实现，但代价比较大，此时用原子类更加方便。基本数据类型的原子类有：</p><ul><li>AtomicInteger 原子更新整型</li><li>AtomicLong 原子更新长整型</li><li>AtomicBoolean 原子更新布尔类型</li></ul><p>Atomic数组类型有：</p><ul><li>AtomicIntegerArray 原子更新整型数组里的元素</li><li>AtomicLongArray 原子更新长整型数组里的元素</li><li>AtomicReferenceArray 原子更新引用类型数组里的元素。</li></ul><p>Atomic引用类型有：</p><ul><li>AtomicReference 原子更新引用类型</li><li>AtomicMarkableReference 原子更新带有标记位的引用类型，可以绑定一个 boolean 标记</li><li>AtomicStampedReference 原子更新带有版本号的引用类型</li></ul><p>FieldUpdater类型：</p><ul><li>AtomicIntegerFieldUpdater 原子更新整型字段的更新器</li><li>AtomicLongFieldUpdater 原子更新长整型字段的更新器</li><li>AtomicReferenceFieldUpdater 原子更新引用类型字段的更新器</li></ul><h3 id="简述atomic类基本实现原理" tabindex="-1"><a class="header-anchor" href="#简述atomic类基本实现原理" aria-hidden="true">#</a> 简述Atomic类基本实现原理</h3><p>以AtomicIntger 为例。</p><p>方法getAndIncrement，以原子方式将当前的值加1，具体实现为：</p><ul><li>在 for 死循环中取得 AtomicInteger 里存储的数值</li><li>对 AtomicInteger 当前的值加 1</li><li>调用 compareAndSet 方法进行原子更新</li><li>先检查当前数值是否等于 expect</li><li>如果等于则说明当前值没有被其他线程修改，则将值更新为 next，</li><li>如果不是会更新失败返回 false，程序会进入 for 循环重新进行 compareAndSet 操作。</li></ul><h3 id="简述countdownlatch" tabindex="-1"><a class="header-anchor" href="#简述countdownlatch" aria-hidden="true">#</a> 简述CountDownLatch</h3><p>CountDownLatch这个类使一个线程等待其他线程各自执行完毕后再执行。是通过一个计数器来实现的，计数器的初始值是线程的数量。每当一个线程执行完毕后，调用countDown方法，计数器的值就减1，当计数器的值为0时，表示所有线程都执行完毕，然后在等待的线程就可以恢复工作了。只能一次性使用，不能reset。</p><h3 id="简述cyclicbarrier" tabindex="-1"><a class="header-anchor" href="#简述cyclicbarrier" aria-hidden="true">#</a> 简述CyclicBarrier</h3><p>CyclicBarrier 主要功能和CountDownLatch类似，也是通过一个计数器，使一个线程等待其他线程各自执行完毕后再执行。但是其可以重复使用（reset）。</p><h3 id="简述semaphore" tabindex="-1"><a class="header-anchor" href="#简述semaphore" aria-hidden="true">#</a> 简述Semaphore</h3><p>Semaphore即信号量。Semaphore 的构造方法参数接收一个 int 值，设置一个计数器，表示可用的许可数量即最大并发数。使用 acquire 方法获得一个许可证，计数器减一，使用 release 方法归还许可，计数器加一。如果此时计数器值为0，线程进入休眠。</p><h3 id="简述exchanger" tabindex="-1"><a class="header-anchor" href="#简述exchanger" aria-hidden="true">#</a> 简述Exchanger</h3><p>Exchanger类可用于两个线程之间交换信息。可简单地将Exchanger对象理解为一个包含两个格子的容器，通过exchanger方法可以向两个格子中填充信息。线程通过exchange 方法交换数据，第一个线程执行 exchange 方法后会阻塞等待第二个线程执行该方法。当两个线程都到达同步点时这两个线程就可以交换数据当两个格子中的均被填充时，该对象会自动将两个格子的信息交换，然后返回给线程，从而实现两个线程的信息交换。</p><h3 id="简述concurrenthashmap" tabindex="-1"><a class="header-anchor" href="#简述concurrenthashmap" aria-hidden="true">#</a> 简述ConcurrentHashMap</h3><p>JDK7采用锁分段技术。首先将数据分成 Segment 数据段，然后给每一个数据段配一把锁，当一个线程占用锁访问其中一个段的数据时，其他段的数据也能被其他线程访问。</p><p>get 除读到空值不需要加锁。该方法先经过一次再散列，再用这个散列值通过散列运算定位到 Segment，最后通过散列算法定位到元素。put 须加锁，首先定位到 Segment，然后进行插入操作，第一步判断是否需要对 Segment 里的 HashEntry 数组进行扩容，第二步定位添加元素的位置，然后将其放入数组。</p><p>JDK8的改进</p><ul><li>取消分段锁机制，采用CAS算法进行值的设置，如果CAS失败再使用 synchronized 加锁添加元素</li><li>引入红黑树结构，当某个槽内的元素个数超过8且 Node数组 容量大于 64 时，链表转为红黑树。</li><li>使用了更加优化的方式统计集合内的元素数量。</li></ul><h3 id="synchronized底层实现原理" tabindex="-1"><a class="header-anchor" href="#synchronized底层实现原理" aria-hidden="true">#</a> synchronized底层实现原理</h3><p>Java 对象底层都会关联一个 monitor，使用 synchronized 时 JVM 会根据使用环境找到对象的 monitor，根据 monitor 的状态进行加解锁的判断。如果成功加锁就成为该 monitor 的唯一持有者，monitor 在被释放前不能再被其他线程获取。</p><p>synchronized在JVM编译后会产生monitorenter 和 monitorexit 这两个字节码指令，获取和释放 monitor。这两个字节码指令都需要一个引用类型的参数指明要锁定和解锁的对象，对于同步普通方法，锁是当前实例对象；对于静态同步方法，锁是当前类的 Class 对象；对于同步方法块，锁是 synchronized 括号里的对象。</p><p>执行 monitorenter 指令时，首先尝试获取对象锁。如果这个对象没有被锁定，或当前线程已经持有锁，就把锁的计数器加 1，执行 monitorexit 指令时会将锁计数器减 1。一旦计数器为 0 锁随即就被释放。</p><h3 id="synchronized关键词使用方法" tabindex="-1"><a class="header-anchor" href="#synchronized关键词使用方法" aria-hidden="true">#</a> synchronized关键词使用方法</h3><ul><li>直接修饰某个实例方法</li><li>直接修饰某个静态方法</li><li>修饰代码块</li></ul><h3 id="简述java偏向锁" tabindex="-1"><a class="header-anchor" href="#简述java偏向锁" aria-hidden="true">#</a> 简述Java偏向锁</h3><p>JDK 1.6 中提出了偏向锁的概念。该锁提出的原因是，开发者发现多数情况下锁并不存在竞争，一把锁往往是由同一个线程获得的。偏向锁并不会主动释放，这样每次偏向锁进入的时候都会判断该资源是否是偏向自己的，如果是偏向自己的则不需要进行额外的操作，直接可以进入同步操作。</p><p>其申请流程为：</p><ul><li>首先需要判断对象的 Mark Word 是否属于偏向模式，如果不属于，那就进入轻量级锁判断逻辑。否则继续下一步判断；</li><li>判断目前请求锁的线程 ID 是否和偏向锁本身记录的线程 ID 一致。如果一致，继续下一步的判断，如果不一致，跳转到步骤4；</li><li>判断是否需要重偏向。如果不用的话，直接获得偏向锁；</li><li>利用 CAS 算法将对象的 Mark Word 进行更改，使线程 ID 部分换成本线程 ID。如果更换成功，则重偏向完成，获得偏向锁。如果失败，则说明有多线程竞争，升级为轻量级锁。</li></ul><h3 id="简述轻量级锁" tabindex="-1"><a class="header-anchor" href="#简述轻量级锁" aria-hidden="true">#</a> 简述轻量级锁</h3><p>轻量级锁是为了在没有竞争的前提下减少重量级锁出现并导致的性能消耗。</p><p>其申请流程为：</p><ul><li>如果同步对象没有被锁定，虚拟机将在当前线程的栈帧中建立一个锁记录空间，存储锁对象目前 Mark Word 的拷贝。</li><li>虚拟机使用 CAS 尝试把对象的 Mark Word 更新为指向锁记录的指针</li><li>如果更新成功即代表该线程拥有了锁，锁标志位将转变为 00，表示处于轻量级锁定状态。</li><li>如果更新失败就意味着至少存在一条线程与当前线程竞争。虚拟机检查对象的 Mark Word 是否指向当前线程的栈帧</li><li>如果指向当前线程的栈帧，说明当前线程已经拥有了锁，直接进入同步块继续执行</li><li>如果不是则说明锁对象已经被其他线程抢占。</li><li>如果出现两条以上线程争用同一个锁，轻量级锁就不再有效，将膨胀为重量级锁，锁标志状态变为 10，此时Mark Word 存储的就是指向重量级锁的指针，后面等待锁的线程也必须阻塞。</li></ul><h3 id="简述锁优化策略" tabindex="-1"><a class="header-anchor" href="#简述锁优化策略" aria-hidden="true">#</a> 简述锁优化策略</h3><p>即自适应自旋、锁消除、锁粗化、锁升级等策略偏。</p><h3 id="简述java的自旋锁" tabindex="-1"><a class="header-anchor" href="#简述java的自旋锁" aria-hidden="true">#</a> 简述Java的自旋锁</h3><p>线程获取锁失败后，可以采用这样的策略，可以不放弃 CPU ，不停的重试内重试，这种操作也称为自旋锁。</p><h3 id="简述自适应自旋锁" tabindex="-1"><a class="header-anchor" href="#简述自适应自旋锁" aria-hidden="true">#</a> 简述自适应自旋锁</h3><p>自适应自旋锁自旋次数不再人为设定，通常由前一次在同一个锁上的自旋时间及锁的拥有者的状态决定。</p><h3 id="简述锁粗化" tabindex="-1"><a class="header-anchor" href="#简述锁粗化" aria-hidden="true">#</a> 简述锁粗化</h3><p>锁粗化的思想就是扩大加锁范围，避免反复的加锁和解锁。</p><h3 id="简述锁消除" tabindex="-1"><a class="header-anchor" href="#简述锁消除" aria-hidden="true">#</a> 简述锁消除</h3><p>锁消除是一种更为彻底的优化，在编译时，Java编译器对运行上下文进行扫描，去除不可能存在共享资源竞争的锁。</p><h3 id="简述lock与reentrantlock" tabindex="-1"><a class="header-anchor" href="#简述lock与reentrantlock" aria-hidden="true">#</a> 简述Lock与ReentrantLock</h3><p>Lock接口是 Java并发包的顶层接口。</p><p>可重入锁 ReentrantLock 是 Lock 最常见的实现，与 synchronized 一样可重入。ReentrantLock 在默认情况下是非公平的，可以通过构造方法指定公平锁。一旦使用了公平锁，性能会下降。</p><h3 id="简述aqs" tabindex="-1"><a class="header-anchor" href="#简述aqs" aria-hidden="true">#</a> 简述AQS</h3><p>AQS（AbstractQuenedSynchronizer）抽象的队列式同步器。AQS是将每一条请求共享资源的线程封装成一个锁队列的一个结点（Node），来实现锁的分配。AQS是用来构建锁或其他同步组件的基础框架，它使用一个 volatile int state 变量作为共享资源，如果线程获取资源失败，则进入同步队列等待；如果获取成功就执行临界区代码，释放资源时会通知同步队列中的等待线程。</p><p>子类通过继承同步器并实现它的抽象方法getState、setState 和 compareAndSetState对同步状态进行更改。</p><p>AQS获取独占锁/释放独占锁原理：</p><p>获取：（acquire）</p><ul><li>调用 tryAcquire 方法安全地获取线程同步状态，获取失败的线程会被构造同步节点并通过 addWaiter 方法加入到同步队列的尾部，在队列中自旋。</li><li>调用 acquireQueued 方法使得该节点以死循环的方式获取同步状态，如果获取不到则阻塞。</li></ul><p>释放：（release）</p><ul><li>调用 tryRelease 方法释放同步状态</li><li>调用 unparkSuccessor 方法唤醒头节点的后继节点，使后继节点重新尝试获取同步状态。</li></ul><p>AQS获取共享锁/释放共享锁原理</p><p>获取锁（acquireShared）</p><ul><li>调用 tryAcquireShared 方法尝试获取同步状态，返回值不小于 0 表示能获取同步状态。</li><li>释放（releaseShared），并唤醒后续处于等待状态的节点。</li></ul><hr><p>投稿作者：后端技术小牛说 转载链接：<a href="https://mp.weixin.qq.com/s/PmeH38qWVxyIhBpsAsjG7w" target="_blank" rel="noopener noreferrer">https://mp.weixin.qq.com/s/PmeH38qWVxyIhBpsAsjG7w<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><p><img 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right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java 并发编程八股文（背诵版）必看👍</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2021年12月3日</span><meta property="datePublished" content="2021-12-03T03:32:08.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category4" role>求职面试</li><meta property="articleSection" content="求职面试"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag7" role>背诵版八股文</li></ul><meta property="keywords" content="背诵版八股文"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 19 分钟</span><meta property="timeRequired" content="PT19M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/baguwen/java-thread.html#简述java内存模型-jmm" class="router-link-active router-link-exact-active toc-link level3">简述Java内存模型（JMM）</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/baguwen/java-thread.html#简述as-if-serial" 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class="header-anchor" href="#简述java内存模型-jmm" aria-hidden="true">#</a> 简述Java内存模型（JMM）</h3><p>Java内存模型定义了程序中各种变量的访问规则：</p><ul><li>所有变量都存储在主存，每个线程都有自己的工作内存。</li><li>工作内存中保存了被该线程使用的变量的主存副本，线程对变量的所有操作都必须在工作空间进行，不能直接读写主内存数据。</li><li>操作完成后，线程的工作内存通过缓存一致性协议将操作完的数据刷回主存。</li></ul><h3 id="简述as-if-serial" tabindex="-1"><a class="header-anchor" href="#简述as-if-serial" aria-hidden="true">#</a> 简述as-if-serial</h3><p>编译器会对原始的程序进行指令重排序和优化。但不管怎么重排序，其结果都必须和用户原始程序输出的预定结果保持一致。</p><h3 id="简述happens-before八大规则" tabindex="-1"><a class="header-anchor" href="#简述happens-before八大规则" aria-hidden="true">#</a> 简述happens-before八大规则</h3><ul><li>程序次序规则：一个线程内，按照代码顺序，书写在前面的操作先行发生于书写在后面的操作；</li><li>锁定规则：一个unLock操作先行发生于后面对同一个锁的lock操作；</li><li>volatile变量规则：对一个变量的写操作先行发生于后面对这个变量的读操作；</li><li>传递规则：如果操作A先行发生于操作B，而操作B又先行发生于操作C，则可以得出操作A先行发生于操作C；</li><li>线程启动规则：Thread对象的start()方法先行发生于此线程的每个一个动作；</li><li>线程中断规则：对线程interrupt()方法的调用先行发生于被中断线程的代码检测到中断事件的发生；</li><li>线程终结规则：线程中所有的操作都先行发生于线程的终止检测，我们可以通过Thread.join()方法结束、Thread.isAlive()的返回值手段检测到线程已经终止执行；</li><li>对象终结规则：一个对象的初始化完成先行发生于他的finalize()方法的开始；</li></ul><h3 id="as-if-serial-和-happens-before-的区别" tabindex="-1"><a class="header-anchor" href="#as-if-serial-和-happens-before-的区别" aria-hidden="true">#</a> as-if-serial 和 happens-before 的区别</h3><p>as-if-serial 保证单线程程序的执行结果不变，happens-before 保证正确同步的多线程程序的执行结果不变。</p><h3 id="简述原子性操作" tabindex="-1"><a class="header-anchor" href="#简述原子性操作" aria-hidden="true">#</a> 简述原子性操作</h3><p>一个操作或者多个操作，要么全部执行并且执行的过程不会被任何因素打断，要么就都不执行，这就是原子性操作。</p><h3 id="简述线程的可见性" tabindex="-1"><a class="header-anchor" href="#简述线程的可见性" aria-hidden="true">#</a> 简述线程的可见性</h3><p>可见性指当一个线程修改了共享变量时，其他线程能够立即得知修改。volatile、synchronized、final 关键字都能保证可见性。</p><h3 id="简述有序性" tabindex="-1"><a class="header-anchor" href="#简述有序性" aria-hidden="true">#</a> 简述有序性</h3><p>虽然多线程存在并发和指令优化等操作，但在本线程内观察该线程的所有执行操作是有序的。</p><h3 id="简述java中volatile关键字作用" tabindex="-1"><a class="header-anchor" href="#简述java中volatile关键字作用" aria-hidden="true">#</a> 简述Java中volatile关键字作用</h3><ul><li>保证变量对所有线程的可见性。当一个线程修改了变量值，新值对于其他线程来说是立即可以得知的。</li><li>禁止指令重排。使用 volatile 变量进行写操作，编译器在生成字节码时，会在指令序列中插入内存屏障来禁止特定类型的处理器进行重排序。</li></ul><h3 id="java线程的实现方式" tabindex="-1"><a class="header-anchor" href="#java线程的实现方式" aria-hidden="true">#</a> Java线程的实现方式</h3><ul><li>实现Runnable接口</li><li>继承Thread类</li><li>实现Callable接口</li></ul><h3 id="简述java线程的状态" tabindex="-1"><a class="header-anchor" href="#简述java线程的状态" aria-hidden="true">#</a> 简述Java线程的状态</h3><p>线程状态有 NEW、RUNNABLE、BLOCK、WAITING、TIMED_WAITING、THERMINATED</p><ul><li>NEW：新建状态，线程被创建且未启动，此时还未调用 start 方法。</li><li>RUNNABLE：运行状态。表示线程正在JVM中执行，但是这个执行，不一定真的在跑，也可能在排队等CPU。</li><li>BLOCKED：阻塞状态。线程等待获取锁，锁还没获得。</li><li>WAITING：等待状态。线程内run方法执行完Object.wait()/Thread.join()进入该状态。</li><li>TIMED_WAITING：限期等待。在一定时间之后跳出状态。调用Thread.sleep(long) Object.wait(long) Thread.join(long)进入状态。其中这些参数代表等待的时间。</li><li>TERMINATED：结束状态。线程调用完run方法进入该状态。</li></ul><h3 id="简述线程通信的方式" tabindex="-1"><a class="header-anchor" href="#简述线程通信的方式" aria-hidden="true">#</a> 简述线程通信的方式</h3><ul><li>volatile 关键词修饰变量，保证所有线程对变量访问的可见性。</li><li>synchronized关键词。确保多个线程在同一时刻只能有一个处于方法或同步块中。</li><li>wait/notify方法</li><li>IO通信</li></ul><h3 id="简述线程池" tabindex="-1"><a class="header-anchor" href="#简述线程池" aria-hidden="true">#</a> 简述线程池</h3><p>没有线程池的情况下，多次创建，销毁线程开销比较大。如果在开辟的线程执行完当前任务后复用已创建的线程，可以降低开销、控制最大并发数。</p><p>线程池创建线程时，会将线程封装成工作线程 Worker，Worker 在执行完任务后还会循环获取工作队列中的任务来执行。</p><p>将任务派发给线程池时，会出现以下几种情况</p><ul><li>核心线程池未满，创建一个新的线程执行任务。</li><li>如果核心线程池已满，工作队列未满，将线程存储在工作队列。</li><li>如果工作队列已满，线程数小于最大线程数就创建一个新线程处理任务。</li><li>如果超过大小线程数，按照拒绝策略来处理任务。</li></ul><p>线程池参数：</p><ul><li>corePoolSize：常驻核心线程数。超过该值后如果线程空闲会被销毁。</li><li>maximumPoolSize：线程池能够容纳同时执行的线程最大数。</li><li>keepAliveTime：线程空闲时间，线程空闲时间达到该值后会被销毁，直到只剩下 corePoolSize 个线程为止，避免浪费内存资源。</li><li>workQueue：工作队列。</li><li>threadFactory：线程工厂，用来生产一组相同任务的线程。</li><li>handler：拒绝策略。</li></ul><p>拒绝策略有以下几种：</p><ul><li>AbortPolicy：丢弃任务并抛出异常</li><li>CallerRunsPolicy：重新尝试提交该任务</li><li>DiscardOldestPolicy 抛弃队列里等待最久的任务并把当前任务加入队列</li><li>DiscardPolicy 表示直接抛弃当前任务但不抛出异常。</li></ul><h3 id="简述executor框架" tabindex="-1"><a class="header-anchor" href="#简述executor框架" aria-hidden="true">#</a> 简述Executor框架</h3><p>Executor框架目的是将任务提交和任务如何运行分离开来的机制。用户不再需要从代码层考虑设计任务的提交运行，只需要调用Executor框架实现类的Execute方法就可以提交任务。</p><h3 id="简述executor的继承关系" tabindex="-1"><a class="header-anchor" href="#简述executor的继承关系" aria-hidden="true">#</a> 简述Executor的继承关系</h3><ul><li>Executor：一个接口，其定义了一个接收Runnable对象的方法executor，该方法接收一个Runable实例执行这个任务。</li><li>ExecutorService：Executor的子类接口，其定义了一个接收Callable对象的方法，返回 Future 对象，同时提供execute方法。</li><li>ScheduledExecutorService：ExecutorService的子类接口，支持定期执行任务。</li><li>AbstractExecutorService：抽象类，提供 ExecutorService 执行方法的默认实现。</li><li>Executors：实现ExecutorService接口的静态工厂类，提供了一系列工厂方法用于创建线程池。</li><li>ThreadPoolExecutor：继承AbstractExecutorService，用于创建线程池。</li><li>ForkJoinPool: 继承AbstractExecutorService，Fork 将大任务分叉为多个小任务，然后让小任务执行，Join 是获得小任务的结果，类似于map reduce。</li><li>ThreadPoolExecutor：继承ThreadPoolExecutor，实现ScheduledExecutorService，用于创建带定时任务的线程池。</li></ul><h3 id="简述线程池的状态" tabindex="-1"><a class="header-anchor" href="#简述线程池的状态" aria-hidden="true">#</a> 简述线程池的状态</h3><ul><li>Running：能接受新提交的任务，也可以处理阻塞队列的任务。</li><li>Shutdown：不再接受新提交的任务，但可以处理存量任务，线程池处于running时调用shutdown方法，会进入该状态。</li><li>Stop：不接受新任务，不处理存量任务，调用shutdownnow进入该状态。</li><li>Tidying：所有任务已经终止了，worker_count（有效线程数）为0。</li><li>Terminated：线程池彻底终止。在tidying模式下调用terminated方法会进入该状态。</li></ul><h3 id="简述线程池类型" tabindex="-1"><a class="header-anchor" href="#简述线程池类型" aria-hidden="true">#</a> 简述线程池类型</h3><ul><li>newCachedThreadPool 可缓存线程池，可设置最小线程数和最大线程数，线程空闲1分钟后自动销毁。</li><li>newFixedThreadPool 指定工作线程数量线程池。</li><li>newSingleThreadExecutor 单线程Executor。</li><li>newScheduleThreadPool 支持定时任务的指定工作线程数量线程池。</li><li>newSingleThreadScheduledExecutor 支持定时任务的单线程Executor。</li></ul><h3 id="简述阻塞队列" tabindex="-1"><a class="header-anchor" href="#简述阻塞队列" aria-hidden="true">#</a> 简述阻塞队列</h3><p>阻塞队列是生产者消费者的实现具体组件之一。当阻塞队列为空时，从队列中获取元素的操作将会被阻塞，当阻塞队列满了，往队列添加元素的操作将会被阻塞。具体实现有：</p><ul><li>ArrayBlockingQueue：底层是由数组组成的有界阻塞队列。</li><li>LinkedBlockingQueue：底层是由链表组成的有界阻塞队列。</li><li>PriorityBlockingQueue：阻塞优先队列。</li><li>DelayQueue：创建元素时可以指定多久才能从队列中获取当前元素</li><li>SynchronousQueue：不存储元素的阻塞队列，每一个存储必须等待一个取出操作</li><li>LinkedTransferQueue：与LinkedBlockingQueue相比多一个transfer方法，即如果当前有消费者正等待接收元素，可以把生产者传入的元素立刻传输给消费者。</li><li>LinkedBlockingDeque：双向阻塞队列。</li></ul><h3 id="谈一谈threadlocal" tabindex="-1"><a class="header-anchor" href="#谈一谈threadlocal" aria-hidden="true">#</a> 谈一谈ThreadLocal</h3><p>ThreadLocal 是线程共享变量。ThreadLoacl 有一个静态内部类 ThreadLocalMap，其 Key 是 ThreadLocal 对象，值是 Entry 对象，ThreadLocalMap是每个线程私有的。</p><ul><li>set 给ThreadLocalMap设置值。</li><li>get 获取ThreadLocalMap。</li><li>remove 删除ThreadLocalMap类型的对象。</li></ul><p>存在的问题：对于线程池，由于线程池会重用 Thread 对象，因此与 Thread 绑定的 ThreadLocal 也会被重用，造成一系列问题。</p><p>比如说内存泄漏。由于 ThreadLocal 是弱引用，但 Entry 的 value 是强引用，因此当 ThreadLocal 被垃圾回收后，value 依旧不会被释放，产生内存泄漏。</p><h3 id="聊聊你对java并发包下unsafe类的理解" tabindex="-1"><a class="header-anchor" href="#聊聊你对java并发包下unsafe类的理解" aria-hidden="true">#</a> 聊聊你对Java并发包下unsafe类的理解</h3><p>对于 Java 语言，没有直接的指针组件，一般也不能使用偏移量对某块内存进行操作。这些操作相对来讲是安全（safe）的。</p><p>Java 有个类叫 Unsafe 类，这个类使 Java 拥有了像 C 语言的指针一样操作内存空间的能力，同时也带来了指针的问题。这个类可以说是 Java 并发开发的基础。</p><h3 id="java中的乐观锁与cas算法" tabindex="-1"><a class="header-anchor" href="#java中的乐观锁与cas算法" aria-hidden="true">#</a> Java中的乐观锁与CAS算法</h3><p>乐观锁认为数据发送时发生并发冲突的概率不大，所以读操作前不上锁。</p><p>到了写操作时才会进行判断，数据在此期间是否被其他线程修改。如果发生修改，那就返回写入失败；如果没有被修改，那就执行修改操作，返回修改成功。</p><p>乐观锁一般都采用 Compare And Swap（CAS）算法进行实现。顾名思义，该算法涉及到了两个操作，比较（Compare）和交换（Swap）。</p><p>CAS 算法的思路如下：</p><ul><li>该算法认为不同线程对变量的操作时产生竞争的情况比较少。</li><li>该算法的核心是对当前读取变量值 E 和内存中的变量旧值 V 进行比较。</li><li>如果相等，就代表其他线程没有对该变量进行修改，就将变量值更新为新值 N。</li><li>如果不等，就认为在读取值 E 到比较阶段，有其他线程对变量进行过修改，不进行任何操作。</li></ul><h3 id="aba问题及解决方法简述" tabindex="-1"><a class="header-anchor" href="#aba问题及解决方法简述" aria-hidden="true">#</a> ABA问题及解决方法简述</h3><p>CAS 算法是基于值来做比较的，如果当前有两个线程，一个线程将变量值从 A 改为 B ，再由 B 改回为 A ，当前线程开始执行 CAS 算法时，就很容易认为值没有变化，误认为读取数据到执行 CAS 算法的期间，没有线程修改过数据。</p><p>juc 包提供了一个 AtomicStampedReference，即在原始的版本下加入版本号戳，解决 ABA 问题。</p><h3 id="简述常见的atomic类" tabindex="-1"><a class="header-anchor" href="#简述常见的atomic类" aria-hidden="true">#</a> 简述常见的Atomic类</h3><p>在很多时候，我们需要的仅仅是一个简单的、高效的、线程安全的++或者--方案，使用synchronized关键字和lock固然可以实现，但代价比较大，此时用原子类更加方便。基本数据类型的原子类有：</p><ul><li>AtomicInteger 原子更新整型</li><li>AtomicLong 原子更新长整型</li><li>AtomicBoolean 原子更新布尔类型</li></ul><p>Atomic数组类型有：</p><ul><li>AtomicIntegerArray 原子更新整型数组里的元素</li><li>AtomicLongArray 原子更新长整型数组里的元素</li><li>AtomicReferenceArray 原子更新引用类型数组里的元素。</li></ul><p>Atomic引用类型有：</p><ul><li>AtomicReference 原子更新引用类型</li><li>AtomicMarkableReference 原子更新带有标记位的引用类型，可以绑定一个 boolean 标记</li><li>AtomicStampedReference 原子更新带有版本号的引用类型</li></ul><p>FieldUpdater类型：</p><ul><li>AtomicIntegerFieldUpdater 原子更新整型字段的更新器</li><li>AtomicLongFieldUpdater 原子更新长整型字段的更新器</li><li>AtomicReferenceFieldUpdater 原子更新引用类型字段的更新器</li></ul><h3 id="简述atomic类基本实现原理" tabindex="-1"><a class="header-anchor" href="#简述atomic类基本实现原理" aria-hidden="true">#</a> 简述Atomic类基本实现原理</h3><p>以AtomicIntger 为例。</p><p>方法getAndIncrement，以原子方式将当前的值加1，具体实现为：</p><ul><li>在 for 死循环中取得 AtomicInteger 里存储的数值</li><li>对 AtomicInteger 当前的值加 1</li><li>调用 compareAndSet 方法进行原子更新</li><li>先检查当前数值是否等于 expect</li><li>如果等于则说明当前值没有被其他线程修改，则将值更新为 next，</li><li>如果不是会更新失败返回 false，程序会进入 for 循环重新进行 compareAndSet 操作。</li></ul><h3 id="简述countdownlatch" tabindex="-1"><a class="header-anchor" href="#简述countdownlatch" aria-hidden="true">#</a> 简述CountDownLatch</h3><p>CountDownLatch这个类使一个线程等待其他线程各自执行完毕后再执行。是通过一个计数器来实现的，计数器的初始值是线程的数量。每当一个线程执行完毕后，调用countDown方法，计数器的值就减1，当计数器的值为0时，表示所有线程都执行完毕，然后在等待的线程就可以恢复工作了。只能一次性使用，不能reset。</p><h3 id="简述cyclicbarrier" tabindex="-1"><a class="header-anchor" href="#简述cyclicbarrier" aria-hidden="true">#</a> 简述CyclicBarrier</h3><p>CyclicBarrier 主要功能和CountDownLatch类似，也是通过一个计数器，使一个线程等待其他线程各自执行完毕后再执行。但是其可以重复使用（reset）。</p><h3 id="简述semaphore" tabindex="-1"><a class="header-anchor" href="#简述semaphore" aria-hidden="true">#</a> 简述Semaphore</h3><p>Semaphore即信号量。Semaphore 的构造方法参数接收一个 int 值，设置一个计数器，表示可用的许可数量即最大并发数。使用 acquire 方法获得一个许可证，计数器减一，使用 release 方法归还许可，计数器加一。如果此时计数器值为0，线程进入休眠。</p><h3 id="简述exchanger" tabindex="-1"><a class="header-anchor" href="#简述exchanger" aria-hidden="true">#</a> 简述Exchanger</h3><p>Exchanger类可用于两个线程之间交换信息。可简单地将Exchanger对象理解为一个包含两个格子的容器，通过exchanger方法可以向两个格子中填充信息。线程通过exchange 方法交换数据，第一个线程执行 exchange 方法后会阻塞等待第二个线程执行该方法。当两个线程都到达同步点时这两个线程就可以交换数据当两个格子中的均被填充时，该对象会自动将两个格子的信息交换，然后返回给线程，从而实现两个线程的信息交换。</p><h3 id="简述concurrenthashmap" tabindex="-1"><a class="header-anchor" href="#简述concurrenthashmap" aria-hidden="true">#</a> 简述ConcurrentHashMap</h3><p>JDK7采用锁分段技术。首先将数据分成 Segment 数据段，然后给每一个数据段配一把锁，当一个线程占用锁访问其中一个段的数据时，其他段的数据也能被其他线程访问。</p><p>get 除读到空值不需要加锁。该方法先经过一次再散列，再用这个散列值通过散列运算定位到 Segment，最后通过散列算法定位到元素。put 须加锁，首先定位到 Segment，然后进行插入操作，第一步判断是否需要对 Segment 里的 HashEntry 数组进行扩容，第二步定位添加元素的位置，然后将其放入数组。</p><p>JDK8的改进</p><ul><li>取消分段锁机制，采用CAS算法进行值的设置，如果CAS失败再使用 synchronized 加锁添加元素</li><li>引入红黑树结构，当某个槽内的元素个数超过8且 Node数组 容量大于 64 时，链表转为红黑树。</li><li>使用了更加优化的方式统计集合内的元素数量。</li></ul><h3 id="synchronized底层实现原理" tabindex="-1"><a class="header-anchor" href="#synchronized底层实现原理" aria-hidden="true">#</a> synchronized底层实现原理</h3><p>Java 对象底层都会关联一个 monitor，使用 synchronized 时 JVM 会根据使用环境找到对象的 monitor，根据 monitor 的状态进行加解锁的判断。如果成功加锁就成为该 monitor 的唯一持有者，monitor 在被释放前不能再被其他线程获取。</p><p>synchronized在JVM编译后会产生monitorenter 和 monitorexit 这两个字节码指令，获取和释放 monitor。这两个字节码指令都需要一个引用类型的参数指明要锁定和解锁的对象，对于同步普通方法，锁是当前实例对象；对于静态同步方法，锁是当前类的 Class 对象；对于同步方法块，锁是 synchronized 括号里的对象。</p><p>执行 monitorenter 指令时，首先尝试获取对象锁。如果这个对象没有被锁定，或当前线程已经持有锁，就把锁的计数器加 1，执行 monitorexit 指令时会将锁计数器减 1。一旦计数器为 0 锁随即就被释放。</p><h3 id="synchronized关键词使用方法" tabindex="-1"><a class="header-anchor" href="#synchronized关键词使用方法" aria-hidden="true">#</a> synchronized关键词使用方法</h3><ul><li>直接修饰某个实例方法</li><li>直接修饰某个静态方法</li><li>修饰代码块</li></ul><h3 id="简述java偏向锁" tabindex="-1"><a class="header-anchor" href="#简述java偏向锁" aria-hidden="true">#</a> 简述Java偏向锁</h3><p>JDK 1.6 中提出了偏向锁的概念。该锁提出的原因是，开发者发现多数情况下锁并不存在竞争，一把锁往往是由同一个线程获得的。偏向锁并不会主动释放，这样每次偏向锁进入的时候都会判断该资源是否是偏向自己的，如果是偏向自己的则不需要进行额外的操作，直接可以进入同步操作。</p><p>其申请流程为：</p><ul><li>首先需要判断对象的 Mark Word 是否属于偏向模式，如果不属于，那就进入轻量级锁判断逻辑。否则继续下一步判断；</li><li>判断目前请求锁的线程 ID 是否和偏向锁本身记录的线程 ID 一致。如果一致，继续下一步的判断，如果不一致，跳转到步骤4；</li><li>判断是否需要重偏向。如果不用的话，直接获得偏向锁；</li><li>利用 CAS 算法将对象的 Mark Word 进行更改，使线程 ID 部分换成本线程 ID。如果更换成功，则重偏向完成，获得偏向锁。如果失败，则说明有多线程竞争，升级为轻量级锁。</li></ul><h3 id="简述轻量级锁" tabindex="-1"><a class="header-anchor" href="#简述轻量级锁" aria-hidden="true">#</a> 简述轻量级锁</h3><p>轻量级锁是为了在没有竞争的前提下减少重量级锁出现并导致的性能消耗。</p><p>其申请流程为：</p><ul><li>如果同步对象没有被锁定，虚拟机将在当前线程的栈帧中建立一个锁记录空间，存储锁对象目前 Mark Word 的拷贝。</li><li>虚拟机使用 CAS 尝试把对象的 Mark Word 更新为指向锁记录的指针</li><li>如果更新成功即代表该线程拥有了锁，锁标志位将转变为 00，表示处于轻量级锁定状态。</li><li>如果更新失败就意味着至少存在一条线程与当前线程竞争。虚拟机检查对象的 Mark Word 是否指向当前线程的栈帧</li><li>如果指向当前线程的栈帧，说明当前线程已经拥有了锁，直接进入同步块继续执行</li><li>如果不是则说明锁对象已经被其他线程抢占。</li><li>如果出现两条以上线程争用同一个锁，轻量级锁就不再有效，将膨胀为重量级锁，锁标志状态变为 10，此时Mark Word 存储的就是指向重量级锁的指针，后面等待锁的线程也必须阻塞。</li></ul><h3 id="简述锁优化策略" tabindex="-1"><a class="header-anchor" href="#简述锁优化策略" aria-hidden="true">#</a> 简述锁优化策略</h3><p>即自适应自旋、锁消除、锁粗化、锁升级等策略偏。</p><h3 id="简述java的自旋锁" tabindex="-1"><a class="header-anchor" href="#简述java的自旋锁" aria-hidden="true">#</a> 简述Java的自旋锁</h3><p>线程获取锁失败后，可以采用这样的策略，可以不放弃 CPU ，不停的重试内重试，这种操作也称为自旋锁。</p><h3 id="简述自适应自旋锁" tabindex="-1"><a class="header-anchor" href="#简述自适应自旋锁" aria-hidden="true">#</a> 简述自适应自旋锁</h3><p>自适应自旋锁自旋次数不再人为设定，通常由前一次在同一个锁上的自旋时间及锁的拥有者的状态决定。</p><h3 id="简述锁粗化" tabindex="-1"><a class="header-anchor" href="#简述锁粗化" aria-hidden="true">#</a> 简述锁粗化</h3><p>锁粗化的思想就是扩大加锁范围，避免反复的加锁和解锁。</p><h3 id="简述锁消除" tabindex="-1"><a class="header-anchor" href="#简述锁消除" aria-hidden="true">#</a> 简述锁消除</h3><p>锁消除是一种更为彻底的优化，在编译时，Java编译器对运行上下文进行扫描，去除不可能存在共享资源竞争的锁。</p><h3 id="简述lock与reentrantlock" tabindex="-1"><a class="header-anchor" href="#简述lock与reentrantlock" aria-hidden="true">#</a> 简述Lock与ReentrantLock</h3><p>Lock接口是 Java并发包的顶层接口。</p><p>可重入锁 ReentrantLock 是 Lock 最常见的实现，与 synchronized 一样可重入。ReentrantLock 在默认情况下是非公平的，可以通过构造方法指定公平锁。一旦使用了公平锁，性能会下降。</p><h3 id="简述aqs" tabindex="-1"><a class="header-anchor" href="#简述aqs" aria-hidden="true">#</a> 简述AQS</h3><p>AQS（AbstractQuenedSynchronizer）抽象的队列式同步器。AQS是将每一条请求共享资源的线程封装成一个锁队列的一个结点（Node），来实现锁的分配。AQS是用来构建锁或其他同步组件的基础框架，它使用一个 volatile int state 变量作为共享资源，如果线程获取资源失败，则进入同步队列等待；如果获取成功就执行临界区代码，释放资源时会通知同步队列中的等待线程。</p><p>子类通过继承同步器并实现它的抽象方法getState、setState 和 compareAndSetState对同步状态进行更改。</p><p>AQS获取独占锁/释放独占锁原理：</p><p>获取：（acquire）</p><ul><li>调用 tryAcquire 方法安全地获取线程同步状态，获取失败的线程会被构造同步节点并通过 addWaiter 方法加入到同步队列的尾部，在队列中自旋。</li><li>调用 acquireQueued 方法使得该节点以死循环的方式获取同步状态，如果获取不到则阻塞。</li></ul><p>释放：（release）</p><ul><li>调用 tryRelease 方法释放同步状态</li><li>调用 unparkSuccessor 方法唤醒头节点的后继节点，使后继节点重新尝试获取同步状态。</li></ul><p>AQS获取共享锁/释放共享锁原理</p><p>获取锁（acquireShared）</p><ul><li>调用 tryAcquireShared 方法尝试获取同步状态，返回值不小于 0 表示能获取同步状态。</li><li>释放（releaseShared），并唤醒后续处于等待状态的节点。</li></ul><hr><p>投稿作者：后端技术小牛说 转载链接：<a href="https://mp.weixin.qq.com/s/PmeH38qWVxyIhBpsAsjG7w" target="_blank" rel="noopener noreferrer">https://mp.weixin.qq.com/s/PmeH38qWVxyIhBpsAsjG7w<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><p><img 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href="/baguwen/jvm.html#简述minor-gc" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="简述Minor GC"><!---->简述Minor GC<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/baguwen/jvm.html#简述full-gc" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="简述Full GC"><!---->简述Full GC<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/baguwen/jvm.html#常见内存分配策略" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="常见内存分配策略"><!---->常见内存分配策略<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/baguwen/jvm.html#简述jvm类加载过程" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="简述JVM类加载过程"><!---->简述JVM类加载过程<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/baguwen/jvm.html#简述jvm中的类加载器" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="简述JVM中的类加载器"><!---->简述JVM中的类加载器<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/baguwen/jvm.html#简述双亲委派机制" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="简述双亲委派机制"><!---->简述双亲委派机制<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/baguwen/jvm.html#双亲委派机制的优点" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="双亲委派机制的优点"><!---->双亲委派机制的优点<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/baguwen/jvm.html#如何构建自定义类加载器" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="如何构建自定义类加载器"><!---->如何构建自定义类加载器<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/baguwen/jvm.html#jvm常见调优参数" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="JVM常见调优参数"><!---->JVM常见调优参数<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/sidebar/herongwei/mysql.html" class="nav-link sidebar-link sidebar-page" aria-label="精选数据库60道面试题必看👍"><!---->精选数据库60道面试题必看👍<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">城市选择</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow 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33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2021年12月3日</span><meta property="datePublished" content="2021-12-03T03:32:08.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 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href="#java-虚拟机八股文-背诵版-必看" aria-hidden="true">#</a> Java 虚拟机八股文（背诵版）必看👍</h1><h3 id="简述jvm内存模型" tabindex="-1"><a class="header-anchor" href="#简述jvm内存模型" aria-hidden="true">#</a> 简述JVM内存模型</h3><p>线程私有的运行时数据区: 程序计数器、Java 虚拟机栈、本地方法栈。</p><p>线程共享的运行时数据区：Java 堆、方法区。</p><h3 id="简述程序计数器" tabindex="-1"><a class="header-anchor" href="#简述程序计数器" aria-hidden="true">#</a> 简述程序计数器</h3><p>程序计数器表示当前线程所执行的字节码的行号指示器。</p><p>程序计数器不会产生StackOverflowError和OutOfMemoryError。</p><h3 id="简述虚拟机栈" tabindex="-1"><a class="header-anchor" href="#简述虚拟机栈" aria-hidden="true">#</a> 简述虚拟机栈</h3><p>Java 虚拟机栈用来描述 Java 方法执行的内存模型。线程创建时就会分配一个栈空间，线程结束后栈空间被回收。</p><p>栈中元素用于支持虚拟机进行方法调用，每个方法在执行时都会创建一个栈帧存储方法的局部变量表、操作栈、动态链接和返回地址等信息。</p><p>虚拟机栈会产生两类异常：</p><ul><li>StackOverflowError：线程请求的栈深度大于虚拟机允许的深度抛出。</li><li>OutOfMemoryError：如果 JVM 栈容量可以动态扩展，虚拟机栈占用内存超出抛出。</li></ul><h3 id="简述本地方法栈" tabindex="-1"><a class="header-anchor" href="#简述本地方法栈" aria-hidden="true">#</a> 简述本地方法栈</h3><p>本地方法栈与虚拟机栈作用相似，不同的是虚拟机栈为虚拟机执行 Java 方法服务，本地方法栈为本地方法服务。可以将虚拟机栈看作普通的java函数对应的内存模型，本地方法栈看作由native关键词修饰的函数对应的内存模型。</p><p>本地方法栈会产生两类异常：</p><ul><li>StackOverflowError：线程请求的栈深度大于虚拟机允许的深度抛出。</li><li>OutOfMemoryError：如果 JVM 栈容量可以动态扩展，虚拟机栈占用内存超出抛出。</li></ul><h3 id="简述jvm中的堆" tabindex="-1"><a class="header-anchor" href="#简述jvm中的堆" aria-hidden="true">#</a> 简述JVM中的堆</h3><p>堆主要作用是存放对象实例，Java 里几乎所有对象实例都在堆上分配内存，堆也是内存管理中最大的一块。Java的垃圾回收主要就是针对堆这一区域进行。 可通过 -Xms 和 -Xmx 设置堆的最小和最大容量。</p><p>堆会抛出 OutOfMemoryError异常。</p><h3 id="简述方法区" tabindex="-1"><a class="header-anchor" href="#简述方法区" aria-hidden="true">#</a> 简述方法区</h3><p>方法区用于存储被虚拟机加载的类信息、常量、静态变量等数据。</p><p>JDK6之前使用永久代实现方法区，容易内存溢出。JDK7 把放在永久代的字符串常量池、静态变量等移出，JDK8 中抛弃永久代，改用在本地内存中实现的元空间来实现方法区，把 JDK 7 中永久代内容移到元空间。</p><p>方法区会抛出 OutOfMemoryError异常。</p><h3 id="简述运行时常量池" tabindex="-1"><a class="header-anchor" href="#简述运行时常量池" aria-hidden="true">#</a> 简述运行时常量池</h3><p>运行时常量池存放常量池表，用于存放编译器生成的各种字面量与符号引用。一般除了保存 Class 文件中描述的符号引用外，还会把符号引用翻译的直接引用也存储在运行时常量池。除此之外，也会存放字符串基本类型。</p><p>JDK8之前，放在方法区，大小受限于方法区。JDK8将运行时常量池存放堆中。</p><h3 id="简述直接内存" tabindex="-1"><a class="header-anchor" href="#简述直接内存" aria-hidden="true">#</a> 简述直接内存</h3><p>直接内存也称为堆外内存，就是把内存对象分配在JVM堆外的内存区域。这部分内存不是虚拟机管理，而是由操作系统来管理。 Java通过DriectByteBuffer对其进行操作，避免了在 Java 堆和 Native堆来回复制数据。</p><h3 id="简述java创建对象的过程" tabindex="-1"><a class="header-anchor" href="#简述java创建对象的过程" aria-hidden="true">#</a> 简述Java创建对象的过程</h3><ul><li>检查该指令的参数能否在常量池中定位到一个类的符号引用，并检查引用代表的类是否已被加载、解析和初始化，如果没有就先执行类加载。</li><li>通过检查通过后虚拟机将为新生对象分配内存。</li><li>完成内存分配后虚拟机将成员变量设为零值</li><li>设置对象头，包括哈希码、GC 信息、锁信息、对象所属类的类元信息等。</li><li>执行 init 方法，初始化成员变量，执行实例化代码块，调用类的构造方法，并把堆内对象的首地址赋值给引用变量。</li></ul><h3 id="简述jvm给对象分配内存的策略" tabindex="-1"><a class="header-anchor" href="#简述jvm给对象分配内存的策略" aria-hidden="true">#</a> 简述JVM给对象分配内存的策略</h3><ul><li>指针碰撞：这种方式在内存中放一个指针作为分界指示器将使用过的内存放在一边，空闲的放在另一边，通过指针挪动完成分配。</li><li>空闲列表：对于 Java 堆内存不规整的情况，虚拟机必须维护一个列表记录哪些内存可用，在分配时从列表中找到一块足够大的空间划分给对象并更新列表记录。</li></ul><h3 id="java对象内存分配是如何保证线程安全的" tabindex="-1"><a class="header-anchor" href="#java对象内存分配是如何保证线程安全的" aria-hidden="true">#</a> Java对象内存分配是如何保证线程安全的</h3><p>第一种方法，采用CAS机制，配合失败重试的方式保证更新操作的原子性。该方式效率低。</p><p>第二种方法，每个线程在Java堆中预先分配一小块内存，然后再给对象分配内存的时候，直接在自己这块&quot;私有&quot;内存中分配。一般采用这种策略。</p><h3 id="简述对象的内存布局" tabindex="-1"><a class="header-anchor" href="#简述对象的内存布局" aria-hidden="true">#</a> 简述对象的内存布局</h3><p>对象在堆内存的存储布局可分为对象头、实例数据和对齐填充。</p><p>1）对象头主要包含两部分数据： MarkWord、类型指针。</p><p>MarkWord 用于存储哈希码（HashCode）、GC分代年龄、锁状态标志位、线程持有的锁、偏向线程ID等信息。</p><p>类型指针即对象指向他的类元数据指针，如果对象是一个 Java 数组，会有一块用于记录数组长度的数据。</p><p>2）实例数据存储代码中所定义的各种类型的字段信息。</p><p>3）对齐填充起占位作用。HotSpot 虚拟机要求对象的起始地址必须是8的整数倍，因此需要对齐填充。</p><h3 id="如何判断对象是否是垃圾" tabindex="-1"><a class="header-anchor" href="#如何判断对象是否是垃圾" aria-hidden="true">#</a> 如何判断对象是否是垃圾</h3><p>1）引用计数法：</p><p>设置引用计数器，对象被引用计数器加 1，引用失效时计数器减 1，如果计数器为 0 则被标记为垃圾。会存在对象间循环引用的问题，一般不使用这种方法。</p><p>2）可达性分析：</p><p>通过 GC Roots 的根对象作为起始节点，从这些节点开始，根据引用关系向下搜索，如果某个对象没有被搜到，则会被标记为垃圾。可作为 GC Roots 的对象包括虚拟机栈和本地方法栈中引用的对象、类静态属性引用的对象、常量引用的对象。</p><h3 id="简述java的引用类型" tabindex="-1"><a class="header-anchor" href="#简述java的引用类型" aria-hidden="true">#</a> 简述java的引用类型</h3><ul><li>强引用： 被强引用关联的对象不会被回收。一般采用 new 方法创建强引用。</li><li>软引用：被软引用关联的对象只有在内存不够的情况下才会被回收。一般采用 SoftReference 类来创建软引用。</li><li>弱引用：垃圾收集器碰到即回收，也就是说它只能存活到下一次垃圾回收发生之前。一般采用 WeakReference 类来创建弱引用。</li><li>虚引用： 无法通过该引用获取对象。唯一目的就是为了能在对象被回收时收到一个系统通知。虚引用必须与引用队列联合使用。</li></ul><h3 id="简述标记清除算法、标记整理算法和标记复制算法" tabindex="-1"><a class="header-anchor" href="#简述标记清除算法、标记整理算法和标记复制算法" aria-hidden="true">#</a> 简述标记清除算法、标记整理算法和标记复制算法</h3><ul><li>标记清除算法：先标记需清除的对象，之后统一回收。这种方法效率不高，会产生大量不连续的碎片。</li><li>标记整理算法：先标记存活对象，然后让所有存活对象向一端移动，之后清理端边界以外的内存</li><li>标记复制算法：将可用内存按容量划分为大小相等的两块，每次只使用其中一块。当使用的这块空间用完了，就将存活对象复制到另一块，再把已使用过的内存空间一次清理掉。</li></ul><h3 id="简述分代收集算法" tabindex="-1"><a class="header-anchor" href="#简述分代收集算法" aria-hidden="true">#</a> 简述分代收集算法</h3><p>根据对象存活周期将内存划分为几块，不同块采用适当的收集算法。</p><p>一般将堆分为新生代和老年代，对这两块采用不同的算法。</p><p>新生代使用：标记复制算法</p><p>老年代使用：标记清除或者标记整理算法</p><h3 id="简述serial垃圾收集器" tabindex="-1"><a class="header-anchor" href="#简述serial垃圾收集器" aria-hidden="true">#</a> 简述Serial垃圾收集器</h3><p>Serial垃圾收集器是单线程串行收集器。垃圾回收的时候，必须暂停其他所有线程。新生代使用标记复制算法，老年代使用标记整理算法。简单高效。</p><h3 id="简述parnew垃圾收集器" tabindex="-1"><a class="header-anchor" href="#简述parnew垃圾收集器" aria-hidden="true">#</a> 简述ParNew垃圾收集器</h3><p>ParNew垃圾收集器可以看作Serial垃圾收集器的多线程版本，新生代使用标记复制算法，老年代使用标记整理算法。</p><h3 id="简述parallel-scavenge垃圾收集器" tabindex="-1"><a class="header-anchor" href="#简述parallel-scavenge垃圾收集器" aria-hidden="true">#</a> 简述Parallel Scavenge垃圾收集器</h3><p>注重吞吐量，即 CPU运行代码时间/CPU耗时总时间（CPU运行代码时间+ 垃圾回收时间）。新生代使用标记复制算法，老年代使用标记整理算法。</p><h3 id="简述cms垃圾收集器" tabindex="-1"><a class="header-anchor" href="#简述cms垃圾收集器" aria-hidden="true">#</a> 简述CMS垃圾收集器</h3><p>CMS垃圾收集器注重最短时间停顿。CMS垃圾收集器为最早提出的并发收集器，垃圾收集线程与用户线程同时工作。采用标记清除算法。该收集器分为初始标记、并发标记、并发预清理、并发清除、并发重置这么几个步骤。</p><ul><li>初始标记：暂停其他线程(stop the world)，标记与GC roots直接关联的对象。</li><li>并发标记：可达性分析过程(程序不会停顿)。</li><li>并发预清理：查找执行并发标记阶段从年轻代晋升到老年代的对象，重新标记，暂停虚拟机（stop the world）扫描CMS堆中剩余对象。</li><li>并发清除：清理垃圾对象，(程序不会停顿)。</li><li>并发重置，重置CMS收集器的数据结构。</li></ul><h3 id="简述g1垃圾收集器" tabindex="-1"><a class="header-anchor" href="#简述g1垃圾收集器" aria-hidden="true">#</a> 简述G1垃圾收集器</h3><p>和Serial、Parallel Scavenge、CMS不同，G1垃圾收集器把堆划分成多个大小相等的独立区域（Region），新生代和老年代不再物理隔离。通过引入 Region 的概念，从而将原来的一整块内存空间划分成多个的小空间，使得每个小空间可以单独进行垃圾回收。</p><ul><li>初始标记：标记与GC roots直接关联的对象。</li><li>并发标记：可达性分析。</li><li>最终标记：对并发标记过程中，用户线程修改的对象再次标记一下。</li><li>筛选回收：对各个Region的回收价值和成本进行排序，然后根据用户所期望的GC停顿时间制定回收计划并回收。</li></ul><h3 id="简述minor-gc" tabindex="-1"><a class="header-anchor" href="#简述minor-gc" aria-hidden="true">#</a> 简述Minor GC</h3><p>Minor GC指发生在新生代的垃圾收集，因为 Java 对象大多存活时间短，所以 Minor GC 非常频繁，一般回收速度也比较快。</p><h3 id="简述full-gc" tabindex="-1"><a class="header-anchor" href="#简述full-gc" aria-hidden="true">#</a> 简述Full GC</h3><p>Full GC 是清理整个堆空间—包括年轻代和永久代。调用System.gc(),老年代空间不足，空间分配担保失败，永生代空间不足会产生full gc。</p><h3 id="常见内存分配策略" tabindex="-1"><a class="header-anchor" href="#常见内存分配策略" aria-hidden="true">#</a> 常见内存分配策略</h3><p>大多数情况下对象在新生代 Eden 区分配，当 Eden 没有足够空间时将发起一次 Minor GC。</p><p>大对象需要大量连续内存空间，直接进入老年代区分配。</p><p>如果经历过第一次 Minor GC 仍然存活且能被 Survivor 容纳，该对象就会被移动到 Survivor 中并将年龄设置为 1，并且每熬过一次 Minor GC 年龄就加 1 ，当增加到一定程度（默认15）就会被晋升到老年代。</p><p>如果在 Survivor 中相同年龄所有对象大小的总和大于 Survivor 的一半，年龄不小于该年龄的对象就可以直接进入老年代。</p><p>MinorGC 前，虚拟机必须检查老年代最大可用连续空间是否大于新生代对象总空间，如果满足则说明这次 Minor GC 确定安全。如果不，JVM会查看HandlePromotionFailure 参数是否允许担保失败，如果允许会继续检查老年代最大可用连续空间是否大于历次晋升老年代对象的平均大小，如果满足将Minor GC，否则改成一次 FullGC。</p><h3 id="简述jvm类加载过程" tabindex="-1"><a class="header-anchor" href="#简述jvm类加载过程" aria-hidden="true">#</a> 简述JVM类加载过程</h3><p>1）加载：</p><ul><li>通过全类名获取类的二进制字节流。</li><li>将类的静态存储结构转化为方法区的运行时数据结构。</li><li>在内存中生成类的Class对象，作为方法区数据的入口。</li></ul><p>2）验证：对文件格式，元数据，字节码，符号引用等验证正确性。</p><p>3）准备：在方法区内为类变量分配内存并设置为0值。</p><p>4）解析：将符号引用转化为直接引用。</p><p>5）初始化：执行类构造器clinit方法，真正初始化。</p><h3 id="简述jvm中的类加载器" tabindex="-1"><a class="header-anchor" href="#简述jvm中的类加载器" aria-hidden="true">#</a> 简述JVM中的类加载器</h3><ul><li>BootstrapClassLoader启动类加载器：加载/lib下的jar包和类。 由C++编写。</li><li>ExtensionClassLoader扩展类加载器： /lib/ext目录下的jar包和类。由Java编写。</li><li>AppClassLoader应用类加载器，加载当前classPath下的jar包和类。由Java编写。</li></ul><h3 id="简述双亲委派机制" tabindex="-1"><a class="header-anchor" href="#简述双亲委派机制" aria-hidden="true">#</a> 简述双亲委派机制</h3><p>一个类加载器收到类加载请求之后，首先判断当前类是否被加载过。已经被加载的类会直接返回，如果没有被加载，首先将类加载请求转发给父类加载器，一直转发到启动类加载器，只有当父类加载器无法完成时才尝试自己加载。</p><p>加载类顺序：BootstrapClassLoader-&gt;ExtensionClassLoader-&gt;AppClassLoader-&gt;CustomClassLoader 检查类是否加载顺序： CustomClassLoader-&gt;AppClassLoader-&gt;ExtensionClassLoader-&gt;BootstrapClassLoader</p><h3 id="双亲委派机制的优点" tabindex="-1"><a class="header-anchor" href="#双亲委派机制的优点" aria-hidden="true">#</a> 双亲委派机制的优点</h3><ul><li>避免类的重复加载。相同的类被不同的类加载器加载会产生不同的类，双亲委派保证了Java程序的稳定运行。</li><li>保证核心API不被修改。</li><li>如何破坏双亲委派机制</li><li>重载loadClass()方法，即自定义类加载器。</li></ul><h3 id="如何构建自定义类加载器" tabindex="-1"><a class="header-anchor" href="#如何构建自定义类加载器" aria-hidden="true">#</a> 如何构建自定义类加载器</h3><p>新建自定义类继承自java.lang.ClassLoader，重写findClass、loadClass、defineClass方法</p><h3 id="jvm常见调优参数" tabindex="-1"><a class="header-anchor" href="#jvm常见调优参数" aria-hidden="true">#</a> JVM常见调优参数</h3><ul><li>-Xms 初始堆大小</li><li>-Xmx 最大堆大小</li><li>-XX:NewSize 年轻代大小</li><li>-XX:MaxNewSize 年轻代最大值</li><li>-XX:PermSize 永生代初始值</li><li>-XX:MaxPermSize 永生代最大值</li><li>-XX:NewRatio 新生代与老年代的比例</li></ul><hr><p>投稿作者：后端技术小牛说 转载链接：<a href="https://mp.weixin.qq.com/s/PmeH38qWVxyIhBpsAsjG7w" target="_blank" rel="noopener noreferrer">https://mp.weixin.qq.com/s/PmeH38qWVxyIhBpsAsjG7w<span><svg class="external-link-icon" 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class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 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0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category4" role>求职面试</li><meta property="articleSection" content="求职面试"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 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aria-current="page" href="/baguwen/jvm.html#双亲委派机制的优点" class="router-link-active router-link-exact-active toc-link level3">双亲委派机制的优点</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/baguwen/jvm.html#如何构建自定义类加载器" class="router-link-active router-link-exact-active toc-link level3">如何构建自定义类加载器</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/baguwen/jvm.html#jvm常见调优参数" class="router-link-active router-link-exact-active toc-link level3">JVM常见调优参数</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="java-虚拟机八股文-背诵版-必看" tabindex="-1"><a class="header-anchor" href="#java-虚拟机八股文-背诵版-必看" aria-hidden="true">#</a> Java 虚拟机八股文（背诵版）必看👍</h1><h3 id="简述jvm内存模型" tabindex="-1"><a class="header-anchor" href="#简述jvm内存模型" aria-hidden="true">#</a> 简述JVM内存模型</h3><p>线程私有的运行时数据区: 程序计数器、Java 虚拟机栈、本地方法栈。</p><p>线程共享的运行时数据区：Java 堆、方法区。</p><h3 id="简述程序计数器" tabindex="-1"><a class="header-anchor" href="#简述程序计数器" aria-hidden="true">#</a> 简述程序计数器</h3><p>程序计数器表示当前线程所执行的字节码的行号指示器。</p><p>程序计数器不会产生StackOverflowError和OutOfMemoryError。</p><h3 id="简述虚拟机栈" tabindex="-1"><a class="header-anchor" href="#简述虚拟机栈" aria-hidden="true">#</a> 简述虚拟机栈</h3><p>Java 虚拟机栈用来描述 Java 方法执行的内存模型。线程创建时就会分配一个栈空间，线程结束后栈空间被回收。</p><p>栈中元素用于支持虚拟机进行方法调用，每个方法在执行时都会创建一个栈帧存储方法的局部变量表、操作栈、动态链接和返回地址等信息。</p><p>虚拟机栈会产生两类异常：</p><ul><li>StackOverflowError：线程请求的栈深度大于虚拟机允许的深度抛出。</li><li>OutOfMemoryError：如果 JVM 栈容量可以动态扩展，虚拟机栈占用内存超出抛出。</li></ul><h3 id="简述本地方法栈" tabindex="-1"><a class="header-anchor" href="#简述本地方法栈" aria-hidden="true">#</a> 简述本地方法栈</h3><p>本地方法栈与虚拟机栈作用相似，不同的是虚拟机栈为虚拟机执行 Java 方法服务，本地方法栈为本地方法服务。可以将虚拟机栈看作普通的java函数对应的内存模型，本地方法栈看作由native关键词修饰的函数对应的内存模型。</p><p>本地方法栈会产生两类异常：</p><ul><li>StackOverflowError：线程请求的栈深度大于虚拟机允许的深度抛出。</li><li>OutOfMemoryError：如果 JVM 栈容量可以动态扩展，虚拟机栈占用内存超出抛出。</li></ul><h3 id="简述jvm中的堆" tabindex="-1"><a class="header-anchor" href="#简述jvm中的堆" aria-hidden="true">#</a> 简述JVM中的堆</h3><p>堆主要作用是存放对象实例，Java 里几乎所有对象实例都在堆上分配内存，堆也是内存管理中最大的一块。Java的垃圾回收主要就是针对堆这一区域进行。 可通过 -Xms 和 -Xmx 设置堆的最小和最大容量。</p><p>堆会抛出 OutOfMemoryError异常。</p><h3 id="简述方法区" tabindex="-1"><a class="header-anchor" href="#简述方法区" aria-hidden="true">#</a> 简述方法区</h3><p>方法区用于存储被虚拟机加载的类信息、常量、静态变量等数据。</p><p>JDK6之前使用永久代实现方法区，容易内存溢出。JDK7 把放在永久代的字符串常量池、静态变量等移出，JDK8 中抛弃永久代，改用在本地内存中实现的元空间来实现方法区，把 JDK 7 中永久代内容移到元空间。</p><p>方法区会抛出 OutOfMemoryError异常。</p><h3 id="简述运行时常量池" tabindex="-1"><a class="header-anchor" href="#简述运行时常量池" aria-hidden="true">#</a> 简述运行时常量池</h3><p>运行时常量池存放常量池表，用于存放编译器生成的各种字面量与符号引用。一般除了保存 Class 文件中描述的符号引用外，还会把符号引用翻译的直接引用也存储在运行时常量池。除此之外，也会存放字符串基本类型。</p><p>JDK8之前，放在方法区，大小受限于方法区。JDK8将运行时常量池存放堆中。</p><h3 id="简述直接内存" tabindex="-1"><a class="header-anchor" href="#简述直接内存" aria-hidden="true">#</a> 简述直接内存</h3><p>直接内存也称为堆外内存，就是把内存对象分配在JVM堆外的内存区域。这部分内存不是虚拟机管理，而是由操作系统来管理。 Java通过DriectByteBuffer对其进行操作，避免了在 Java 堆和 Native堆来回复制数据。</p><h3 id="简述java创建对象的过程" tabindex="-1"><a class="header-anchor" href="#简述java创建对象的过程" aria-hidden="true">#</a> 简述Java创建对象的过程</h3><ul><li>检查该指令的参数能否在常量池中定位到一个类的符号引用，并检查引用代表的类是否已被加载、解析和初始化，如果没有就先执行类加载。</li><li>通过检查通过后虚拟机将为新生对象分配内存。</li><li>完成内存分配后虚拟机将成员变量设为零值</li><li>设置对象头，包括哈希码、GC 信息、锁信息、对象所属类的类元信息等。</li><li>执行 init 方法，初始化成员变量，执行实例化代码块，调用类的构造方法，并把堆内对象的首地址赋值给引用变量。</li></ul><h3 id="简述jvm给对象分配内存的策略" tabindex="-1"><a class="header-anchor" href="#简述jvm给对象分配内存的策略" aria-hidden="true">#</a> 简述JVM给对象分配内存的策略</h3><ul><li>指针碰撞：这种方式在内存中放一个指针作为分界指示器将使用过的内存放在一边，空闲的放在另一边，通过指针挪动完成分配。</li><li>空闲列表：对于 Java 堆内存不规整的情况，虚拟机必须维护一个列表记录哪些内存可用，在分配时从列表中找到一块足够大的空间划分给对象并更新列表记录。</li></ul><h3 id="java对象内存分配是如何保证线程安全的" tabindex="-1"><a class="header-anchor" href="#java对象内存分配是如何保证线程安全的" aria-hidden="true">#</a> Java对象内存分配是如何保证线程安全的</h3><p>第一种方法，采用CAS机制，配合失败重试的方式保证更新操作的原子性。该方式效率低。</p><p>第二种方法，每个线程在Java堆中预先分配一小块内存，然后再给对象分配内存的时候，直接在自己这块&quot;私有&quot;内存中分配。一般采用这种策略。</p><h3 id="简述对象的内存布局" tabindex="-1"><a class="header-anchor" href="#简述对象的内存布局" aria-hidden="true">#</a> 简述对象的内存布局</h3><p>对象在堆内存的存储布局可分为对象头、实例数据和对齐填充。</p><p>1）对象头主要包含两部分数据： MarkWord、类型指针。</p><p>MarkWord 用于存储哈希码（HashCode）、GC分代年龄、锁状态标志位、线程持有的锁、偏向线程ID等信息。</p><p>类型指针即对象指向他的类元数据指针，如果对象是一个 Java 数组，会有一块用于记录数组长度的数据。</p><p>2）实例数据存储代码中所定义的各种类型的字段信息。</p><p>3）对齐填充起占位作用。HotSpot 虚拟机要求对象的起始地址必须是8的整数倍，因此需要对齐填充。</p><h3 id="如何判断对象是否是垃圾" tabindex="-1"><a class="header-anchor" href="#如何判断对象是否是垃圾" aria-hidden="true">#</a> 如何判断对象是否是垃圾</h3><p>1）引用计数法：</p><p>设置引用计数器，对象被引用计数器加 1，引用失效时计数器减 1，如果计数器为 0 则被标记为垃圾。会存在对象间循环引用的问题，一般不使用这种方法。</p><p>2）可达性分析：</p><p>通过 GC Roots 的根对象作为起始节点，从这些节点开始，根据引用关系向下搜索，如果某个对象没有被搜到，则会被标记为垃圾。可作为 GC Roots 的对象包括虚拟机栈和本地方法栈中引用的对象、类静态属性引用的对象、常量引用的对象。</p><h3 id="简述java的引用类型" tabindex="-1"><a class="header-anchor" href="#简述java的引用类型" aria-hidden="true">#</a> 简述java的引用类型</h3><ul><li>强引用： 被强引用关联的对象不会被回收。一般采用 new 方法创建强引用。</li><li>软引用：被软引用关联的对象只有在内存不够的情况下才会被回收。一般采用 SoftReference 类来创建软引用。</li><li>弱引用：垃圾收集器碰到即回收，也就是说它只能存活到下一次垃圾回收发生之前。一般采用 WeakReference 类来创建弱引用。</li><li>虚引用： 无法通过该引用获取对象。唯一目的就是为了能在对象被回收时收到一个系统通知。虚引用必须与引用队列联合使用。</li></ul><h3 id="简述标记清除算法、标记整理算法和标记复制算法" tabindex="-1"><a class="header-anchor" href="#简述标记清除算法、标记整理算法和标记复制算法" aria-hidden="true">#</a> 简述标记清除算法、标记整理算法和标记复制算法</h3><ul><li>标记清除算法：先标记需清除的对象，之后统一回收。这种方法效率不高，会产生大量不连续的碎片。</li><li>标记整理算法：先标记存活对象，然后让所有存活对象向一端移动，之后清理端边界以外的内存</li><li>标记复制算法：将可用内存按容量划分为大小相等的两块，每次只使用其中一块。当使用的这块空间用完了，就将存活对象复制到另一块，再把已使用过的内存空间一次清理掉。</li></ul><h3 id="简述分代收集算法" tabindex="-1"><a class="header-anchor" href="#简述分代收集算法" aria-hidden="true">#</a> 简述分代收集算法</h3><p>根据对象存活周期将内存划分为几块，不同块采用适当的收集算法。</p><p>一般将堆分为新生代和老年代，对这两块采用不同的算法。</p><p>新生代使用：标记复制算法</p><p>老年代使用：标记清除或者标记整理算法</p><h3 id="简述serial垃圾收集器" tabindex="-1"><a class="header-anchor" href="#简述serial垃圾收集器" aria-hidden="true">#</a> 简述Serial垃圾收集器</h3><p>Serial垃圾收集器是单线程串行收集器。垃圾回收的时候，必须暂停其他所有线程。新生代使用标记复制算法，老年代使用标记整理算法。简单高效。</p><h3 id="简述parnew垃圾收集器" tabindex="-1"><a class="header-anchor" href="#简述parnew垃圾收集器" aria-hidden="true">#</a> 简述ParNew垃圾收集器</h3><p>ParNew垃圾收集器可以看作Serial垃圾收集器的多线程版本，新生代使用标记复制算法，老年代使用标记整理算法。</p><h3 id="简述parallel-scavenge垃圾收集器" tabindex="-1"><a class="header-anchor" href="#简述parallel-scavenge垃圾收集器" aria-hidden="true">#</a> 简述Parallel Scavenge垃圾收集器</h3><p>注重吞吐量，即 CPU运行代码时间/CPU耗时总时间（CPU运行代码时间+ 垃圾回收时间）。新生代使用标记复制算法，老年代使用标记整理算法。</p><h3 id="简述cms垃圾收集器" tabindex="-1"><a class="header-anchor" href="#简述cms垃圾收集器" aria-hidden="true">#</a> 简述CMS垃圾收集器</h3><p>CMS垃圾收集器注重最短时间停顿。CMS垃圾收集器为最早提出的并发收集器，垃圾收集线程与用户线程同时工作。采用标记清除算法。该收集器分为初始标记、并发标记、并发预清理、并发清除、并发重置这么几个步骤。</p><ul><li>初始标记：暂停其他线程(stop the world)，标记与GC roots直接关联的对象。</li><li>并发标记：可达性分析过程(程序不会停顿)。</li><li>并发预清理：查找执行并发标记阶段从年轻代晋升到老年代的对象，重新标记，暂停虚拟机（stop the world）扫描CMS堆中剩余对象。</li><li>并发清除：清理垃圾对象，(程序不会停顿)。</li><li>并发重置，重置CMS收集器的数据结构。</li></ul><h3 id="简述g1垃圾收集器" tabindex="-1"><a class="header-anchor" href="#简述g1垃圾收集器" aria-hidden="true">#</a> 简述G1垃圾收集器</h3><p>和Serial、Parallel Scavenge、CMS不同，G1垃圾收集器把堆划分成多个大小相等的独立区域（Region），新生代和老年代不再物理隔离。通过引入 Region 的概念，从而将原来的一整块内存空间划分成多个的小空间，使得每个小空间可以单独进行垃圾回收。</p><ul><li>初始标记：标记与GC roots直接关联的对象。</li><li>并发标记：可达性分析。</li><li>最终标记：对并发标记过程中，用户线程修改的对象再次标记一下。</li><li>筛选回收：对各个Region的回收价值和成本进行排序，然后根据用户所期望的GC停顿时间制定回收计划并回收。</li></ul><h3 id="简述minor-gc" tabindex="-1"><a class="header-anchor" href="#简述minor-gc" aria-hidden="true">#</a> 简述Minor GC</h3><p>Minor GC指发生在新生代的垃圾收集，因为 Java 对象大多存活时间短，所以 Minor GC 非常频繁，一般回收速度也比较快。</p><h3 id="简述full-gc" tabindex="-1"><a class="header-anchor" href="#简述full-gc" aria-hidden="true">#</a> 简述Full GC</h3><p>Full GC 是清理整个堆空间—包括年轻代和永久代。调用System.gc(),老年代空间不足，空间分配担保失败，永生代空间不足会产生full gc。</p><h3 id="常见内存分配策略" tabindex="-1"><a class="header-anchor" href="#常见内存分配策略" aria-hidden="true">#</a> 常见内存分配策略</h3><p>大多数情况下对象在新生代 Eden 区分配，当 Eden 没有足够空间时将发起一次 Minor GC。</p><p>大对象需要大量连续内存空间，直接进入老年代区分配。</p><p>如果经历过第一次 Minor GC 仍然存活且能被 Survivor 容纳，该对象就会被移动到 Survivor 中并将年龄设置为 1，并且每熬过一次 Minor GC 年龄就加 1 ，当增加到一定程度（默认15）就会被晋升到老年代。</p><p>如果在 Survivor 中相同年龄所有对象大小的总和大于 Survivor 的一半，年龄不小于该年龄的对象就可以直接进入老年代。</p><p>MinorGC 前，虚拟机必须检查老年代最大可用连续空间是否大于新生代对象总空间，如果满足则说明这次 Minor GC 确定安全。如果不，JVM会查看HandlePromotionFailure 参数是否允许担保失败，如果允许会继续检查老年代最大可用连续空间是否大于历次晋升老年代对象的平均大小，如果满足将Minor GC，否则改成一次 FullGC。</p><h3 id="简述jvm类加载过程" tabindex="-1"><a class="header-anchor" href="#简述jvm类加载过程" aria-hidden="true">#</a> 简述JVM类加载过程</h3><p>1）加载：</p><ul><li>通过全类名获取类的二进制字节流。</li><li>将类的静态存储结构转化为方法区的运行时数据结构。</li><li>在内存中生成类的Class对象，作为方法区数据的入口。</li></ul><p>2）验证：对文件格式，元数据，字节码，符号引用等验证正确性。</p><p>3）准备：在方法区内为类变量分配内存并设置为0值。</p><p>4）解析：将符号引用转化为直接引用。</p><p>5）初始化：执行类构造器clinit方法，真正初始化。</p><h3 id="简述jvm中的类加载器" tabindex="-1"><a class="header-anchor" href="#简述jvm中的类加载器" aria-hidden="true">#</a> 简述JVM中的类加载器</h3><ul><li>BootstrapClassLoader启动类加载器：加载/lib下的jar包和类。 由C++编写。</li><li>ExtensionClassLoader扩展类加载器： /lib/ext目录下的jar包和类。由Java编写。</li><li>AppClassLoader应用类加载器，加载当前classPath下的jar包和类。由Java编写。</li></ul><h3 id="简述双亲委派机制" tabindex="-1"><a class="header-anchor" href="#简述双亲委派机制" aria-hidden="true">#</a> 简述双亲委派机制</h3><p>一个类加载器收到类加载请求之后，首先判断当前类是否被加载过。已经被加载的类会直接返回，如果没有被加载，首先将类加载请求转发给父类加载器，一直转发到启动类加载器，只有当父类加载器无法完成时才尝试自己加载。</p><p>加载类顺序：BootstrapClassLoader-&gt;ExtensionClassLoader-&gt;AppClassLoader-&gt;CustomClassLoader 检查类是否加载顺序： CustomClassLoader-&gt;AppClassLoader-&gt;ExtensionClassLoader-&gt;BootstrapClassLoader</p><h3 id="双亲委派机制的优点" tabindex="-1"><a class="header-anchor" href="#双亲委派机制的优点" aria-hidden="true">#</a> 双亲委派机制的优点</h3><ul><li>避免类的重复加载。相同的类被不同的类加载器加载会产生不同的类，双亲委派保证了Java程序的稳定运行。</li><li>保证核心API不被修改。</li><li>如何破坏双亲委派机制</li><li>重载loadClass()方法，即自定义类加载器。</li></ul><h3 id="如何构建自定义类加载器" tabindex="-1"><a class="header-anchor" href="#如何构建自定义类加载器" aria-hidden="true">#</a> 如何构建自定义类加载器</h3><p>新建自定义类继承自java.lang.ClassLoader，重写findClass、loadClass、defineClass方法</p><h3 id="jvm常见调优参数" tabindex="-1"><a class="header-anchor" href="#jvm常见调优参数" aria-hidden="true">#</a> JVM常见调优参数</h3><ul><li>-Xms 初始堆大小</li><li>-Xmx 最大堆大小</li><li>-XX:NewSize 年轻代大小</li><li>-XX:MaxNewSize 年轻代最大值</li><li>-XX:PermSize 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class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java中常用的48个关键字</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 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class="theme-hope-content"><h1 id="java中常用的48个关键字" tabindex="-1"><a class="header-anchor" href="#java中常用的48个关键字" aria-hidden="true">#</a> Java中常用的48个关键字</h1><p>“二哥，就我之前学过的这些 Java 代码中，有 public、static、void、main 等等，它们应该都是关键字吧？”三妹的脸上泛着甜甜的笑容，我想她在学习 Java 方面已经变得越来越自信了。</p><p>“是的，三妹。Java 中的关键字可不少呢！你一下子可能记不了那么多，不过，先保留个印象吧，对以后的学习会很有帮助。”</p><p>PS：按照首字母的自然顺序排列。</p><ol><li><p><strong>abstract：</strong> 用于声明抽象类，以及抽象方法。</p></li><li><p><strong>boolean：</strong> 用于将变量声明为布尔值类型，只有 true 和 false 两个值。</p></li><li><p><strong>break：</strong> 用于中断循环或 switch 语句。</p></li><li><p><strong>byte：</strong> 用于声明一个可以容纳 8 个比特的变量。</p></li><li><p><strong>case：</strong> 用于在 switch 语句中标记条件的值。</p></li><li><p><strong>catch：</strong> 用于捕获 try 语句中的异常。</p></li><li><p><strong>char：</strong> 用于声明一个可以容纳无符号 16 位比特的 <a href="https://mp.weixin.qq.com/s/pNQjlXOivIgO3pbYc0GnpA" target="_blank" rel="noopener noreferrer">Unicode 字符<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>的变量。</p></li><li><p><strong>class：</strong> 用于声明一个类。</p></li><li><p><strong>continue：</strong> 用于继续下一个循环，可以在指定条件下跳过其余代码。</p></li><li><p><strong>default：</strong> 用于指定 switch 语句中除去 case 条件之外的默认代码块。</p></li><li><p><strong>do：</strong> 通常和 while 关键字配合使用，do 后紧跟循环体。</p></li><li><p><strong>double：</strong> 用于声明一个可以容纳 64 位浮点数的变量。</p></li><li><p><strong>else：</strong> 用于指示 if 语句中的备用分支。</p></li><li><p><strong>enum：</strong> 用于定义一组固定的常量（枚举）。</p></li><li><p><strong>extends：</strong> 用于指示一个类是从另一个类或接口继承的。</p></li><li><p><strong>final：</strong> 用于指示该变量是不可更改的。</p></li><li><p><strong>finally：</strong> 和 <code>try-catch</code> 配合使用，表示无论是否处理异常，总是执行 finally 块中的代码。</p></li><li><p><strong>float：</strong> 用于声明一个可以容纳 32 位浮点数的变量。</p></li><li><p><strong>for：</strong> 用于声明一个 for 循环，如果循环次数是固定的，建议使用 for 循环。</p></li><li><p><strong>if：</strong> 用于指定条件，如果条件为真，则执行对应代码。</p></li><li><p><strong>implements：</strong> 用于实现接口。</p></li><li><p><strong>import：</strong> 用于导入对应的类或者接口。</p></li><li><p><strong>instanceof：</strong> 用于判断对象是否属于某个类型（class）。</p></li><li><p><strong>int：</strong> 用于声明一个可以容纳 32 位带符号的整数变量。</p></li><li><p><strong>interface：</strong> 用于声明接口。</p></li><li><p><strong>long：</strong> 用于声明一个可以容纳 64 位整数的变量。</p></li><li><p><strong>native：</strong> 用于指定一个方法是通过调用本机接口（非 Java）实现的。</p></li><li><p><strong>new：</strong> 用于创建一个新的对象。</p></li><li><p><strong>null：</strong> 如果一个变量是空的（什么引用也没有指向），就可以将它赋值为 null，和空指针异常息息相关。</p></li><li><p><strong>package：</strong> 用于声明类所在的包。</p></li><li><p><strong>private：</strong> 一个访问权限修饰符，表示方法或变量只对当前类可见。</p></li><li><p><strong>protected：</strong> 一个访问权限修饰符，表示方法或变量对同一包内的类和所有子类可见。</p></li><li><p><strong>public：</strong> 一个访问权限修饰符，除了可以声明方法和变量（所有类可见），还可以声明类。<code>main()</code> 方法必须声明为 public。</p></li><li><p><strong>return：</strong> 用于在代码执行完成后返回（一个值）。</p></li><li><p><strong>short：</strong> 用于声明一个可以容纳 16 位整数的变量。</p></li><li><p><strong>static：</strong> 表示该变量或方法是静态变量或静态方法。</p></li><li><p><strong>strictfp：</strong> 并不常见，通常用于修饰一个方法，确保方法体内的浮点数运算在每个平台上执行的结果相同。</p></li><li><p><strong>super：</strong> 可用于调用父类的方法或者字段。</p></li><li><p><strong>switch：</strong> 通常用于三个（以上）的条件判断。</p></li><li><p><strong>synchronized：</strong> 用于指定多线程代码中的同步方法、变量或者代码块。</p></li><li><p><strong>this：</strong> 可用于在方法或构造函数中引用当前对象。</p></li><li><p><strong>throw：</strong> 主动抛出异常。</p></li><li><p><strong>throws：</strong> 用于声明异常。</p></li><li><p><strong>transient：</strong> 修饰的字段不会被序列化。</p></li><li><p><strong>try：</strong> 于包裹要捕获异常的代码块。</p></li><li><p><strong>void：</strong> 用于指定方法没有返回值。</p></li><li><p><strong>volatile：</strong> 保证不同线程对它修饰的变量进行操作时的可见性，即一个线程修改了某个变量的值，新值对其他线程来说是立即可见的。</p></li><li><p><strong>while：</strong> 如果循环次数不固定，建议使用 while 循环。</p></li></ol><p>“好了，三妹，关于 Java 中的关键字就先说这 48 个吧，这只是一个大概的介绍，后面还会对一些特殊的关键字单独拎出来详细地讲，比如说重要的 static、final 等。”转动了一下僵硬的脖子后，我对三妹说。</p><p>“二哥，你辛苦了，足足 48 个啊，容我好好消化一下。”</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/basic-extra-meal/48-keywords.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 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right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java中常用的48个关键字</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span 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123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 4 分钟</span><meta property="timeRequired" content="PT4M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="java中常用的48个关键字" tabindex="-1"><a class="header-anchor" href="#java中常用的48个关键字" aria-hidden="true">#</a> Java中常用的48个关键字</h1><p>“二哥，就我之前学过的这些 Java 代码中，有 public、static、void、main 等等，它们应该都是关键字吧？”三妹的脸上泛着甜甜的笑容，我想她在学习 Java 方面已经变得越来越自信了。</p><p>“是的，三妹。Java 中的关键字可不少呢！你一下子可能记不了那么多，不过，先保留个印象吧，对以后的学习会很有帮助。”</p><p>PS：按照首字母的自然顺序排列。</p><ol><li><p><strong>abstract：</strong> 用于声明抽象类，以及抽象方法。</p></li><li><p><strong>boolean：</strong> 用于将变量声明为布尔值类型，只有 true 和 false 两个值。</p></li><li><p><strong>break：</strong> 用于中断循环或 switch 语句。</p></li><li><p><strong>byte：</strong> 用于声明一个可以容纳 8 个比特的变量。</p></li><li><p><strong>case：</strong> 用于在 switch 语句中标记条件的值。</p></li><li><p><strong>catch：</strong> 用于捕获 try 语句中的异常。</p></li><li><p><strong>char：</strong> 用于声明一个可以容纳无符号 16 位比特的 <a href="https://mp.weixin.qq.com/s/pNQjlXOivIgO3pbYc0GnpA" target="_blank" rel="noopener noreferrer">Unicode 字符<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>的变量。</p></li><li><p><strong>class：</strong> 用于声明一个类。</p></li><li><p><strong>continue：</strong> 用于继续下一个循环，可以在指定条件下跳过其余代码。</p></li><li><p><strong>default：</strong> 用于指定 switch 语句中除去 case 条件之外的默认代码块。</p></li><li><p><strong>do：</strong> 通常和 while 关键字配合使用，do 后紧跟循环体。</p></li><li><p><strong>double：</strong> 用于声明一个可以容纳 64 位浮点数的变量。</p></li><li><p><strong>else：</strong> 用于指示 if 语句中的备用分支。</p></li><li><p><strong>enum：</strong> 用于定义一组固定的常量（枚举）。</p></li><li><p><strong>extends：</strong> 用于指示一个类是从另一个类或接口继承的。</p></li><li><p><strong>final：</strong> 用于指示该变量是不可更改的。</p></li><li><p><strong>finally：</strong> 和 <code>try-catch</code> 配合使用，表示无论是否处理异常，总是执行 finally 块中的代码。</p></li><li><p><strong>float：</strong> 用于声明一个可以容纳 32 位浮点数的变量。</p></li><li><p><strong>for：</strong> 用于声明一个 for 循环，如果循环次数是固定的，建议使用 for 循环。</p></li><li><p><strong>if：</strong> 用于指定条件，如果条件为真，则执行对应代码。</p></li><li><p><strong>implements：</strong> 用于实现接口。</p></li><li><p><strong>import：</strong> 用于导入对应的类或者接口。</p></li><li><p><strong>instanceof：</strong> 用于判断对象是否属于某个类型（class）。</p></li><li><p><strong>int：</strong> 用于声明一个可以容纳 32 位带符号的整数变量。</p></li><li><p><strong>interface：</strong> 用于声明接口。</p></li><li><p><strong>long：</strong> 用于声明一个可以容纳 64 位整数的变量。</p></li><li><p><strong>native：</strong> 用于指定一个方法是通过调用本机接口（非 Java）实现的。</p></li><li><p><strong>new：</strong> 用于创建一个新的对象。</p></li><li><p><strong>null：</strong> 如果一个变量是空的（什么引用也没有指向），就可以将它赋值为 null，和空指针异常息息相关。</p></li><li><p><strong>package：</strong> 用于声明类所在的包。</p></li><li><p><strong>private：</strong> 一个访问权限修饰符，表示方法或变量只对当前类可见。</p></li><li><p><strong>protected：</strong> 一个访问权限修饰符，表示方法或变量对同一包内的类和所有子类可见。</p></li><li><p><strong>public：</strong> 一个访问权限修饰符，除了可以声明方法和变量（所有类可见），还可以声明类。<code>main()</code> 方法必须声明为 public。</p></li><li><p><strong>return：</strong> 用于在代码执行完成后返回（一个值）。</p></li><li><p><strong>short：</strong> 用于声明一个可以容纳 16 位整数的变量。</p></li><li><p><strong>static：</strong> 表示该变量或方法是静态变量或静态方法。</p></li><li><p><strong>strictfp：</strong> 并不常见，通常用于修饰一个方法，确保方法体内的浮点数运算在每个平台上执行的结果相同。</p></li><li><p><strong>super：</strong> 可用于调用父类的方法或者字段。</p></li><li><p><strong>switch：</strong> 通常用于三个（以上）的条件判断。</p></li><li><p><strong>synchronized：</strong> 用于指定多线程代码中的同步方法、变量或者代码块。</p></li><li><p><strong>this：</strong> 可用于在方法或构造函数中引用当前对象。</p></li><li><p><strong>throw：</strong> 主动抛出异常。</p></li><li><p><strong>throws：</strong> 用于声明异常。</p></li><li><p><strong>transient：</strong> 修饰的字段不会被序列化。</p></li><li><p><strong>try：</strong> 于包裹要捕获异常的代码块。</p></li><li><p><strong>void：</strong> 用于指定方法没有返回值。</p></li><li><p><strong>volatile：</strong> 保证不同线程对它修饰的变量进行操作时的可见性，即一个线程修改了某个变量的值，新值对其他线程来说是立即可见的。</p></li><li><p><strong>while：</strong> 如果循环次数不固定，建议使用 while 循环。</p></li></ol><p>“好了，三妹，关于 Java 中的关键字就先说这 48 个吧，这只是一个大概的介绍，后面还会对一些特殊的关键字单独拎出来详细地讲，比如说重要的 static、final 等。”转动了一下僵硬的脖子后，我对三妹说。</p><p>“二哥，你辛苦了，足足 48 个啊，容我好好消化一下。”</p><p><img 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class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-extra-meal/class-object.html" class="nav-link sidebar-link sidebar-page" aria-label="先有Class还是先有Object"><!---->先有Class还是先有Object<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-extra-meal/instanceof-jvm.html" class="nav-link sidebar-link sidebar-page" aria-label="instanceof关键字是如何实现的"><!---->instanceof关键字是如何实现的<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.11 并发编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java重写（Overriding）时应当遵守的11条规则</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 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href="/basic-extra-meal/Overriding.html#_01、什么是重写" class="router-link-active router-link-exact-active toc-link level3">01、什么是重写？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-extra-meal/Overriding.html#_02、哪些方法可以被重写" class="router-link-active router-link-exact-active toc-link level3">02、哪些方法可以被重写？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-extra-meal/Overriding.html#_03、哪些方法不能被重写" class="router-link-active router-link-exact-active toc-link level3">03、哪些方法不能被重写？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-extra-meal/Overriding.html#_04、重写方法的要求" class="router-link-active router-link-exact-active toc-link level3">04、重写方法的要求</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-extra-meal/Overriding.html#_05、如何调用被重写的方法" class="router-link-active router-link-exact-active toc-link level3">05、如何调用被重写的方法？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-extra-meal/Overriding.html#_06、重写和构造方法" class="router-link-active router-link-exact-active toc-link level3">06、重写和构造方法</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-extra-meal/Overriding.html#_07、重写和抽象方法" class="router-link-active router-link-exact-active toc-link level3">07、重写和抽象方法</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-extra-meal/Overriding.html#_08、重写和-synchronized-方法" class="router-link-active router-link-exact-active toc-link level3">08、重写和 synchronized 方法</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-extra-meal/Overriding.html#_09、重写和-strictfp-方法" class="router-link-active router-link-exact-active toc-link level3">09、重写和 strictfp 方法</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="java重写-overriding-时应当遵守的11条规则" tabindex="-1"><a class="header-anchor" href="#java重写-overriding-时应当遵守的11条规则" aria-hidden="true">#</a> Java重写（Overriding）时应当遵守的11条规则</h1><p>重写（Overriding）算是 Java 中一个非常重要的概念，理解重写到底是什么对每个 Java 程序员来说都至关重要，这篇文章就来给大家说说重写过程中应当遵守的 12 条规则。</p><h3 id="_01、什么是重写" tabindex="-1"><a class="header-anchor" href="#_01、什么是重写" aria-hidden="true">#</a> 01、什么是重写？</h3><p>重写带来了一种非常重要的能力，可以让子类重新实现从超类那继承过来的方法。在下面这幅图中，Animal 是父类，Dog 是子类，Dog 重新实现了 <code>move()</code> 方法用来和父类进行区分，毕竟狗狗跑起来还是比较有特色的。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/basic-extra-meal/Overriding-1.png" alt=""></p><p>重写的方法和被重写的方法，不仅方法名相同，参数也相同，只不过，方法体有所不同。</p><h3 id="_02、哪些方法可以被重写" tabindex="-1"><a class="header-anchor" href="#_02、哪些方法可以被重写" aria-hidden="true">#</a> 02、哪些方法可以被重写？</h3><p><strong>规则一：只能重写继承过来的方法</strong>。</p><p>因为重写是在子类重新实现从父类继承过来的方法时发生的，所以只能重写继承过来的方法，这很好理解。这就意味着，只能重写那些被 public、protected 或者 default 修饰的方法，private 修饰的方法无法被重写。</p><p>Animal 类有 <code>move()</code>、<code>eat()</code> 和 <code>sleep()</code> 三个方法：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">Animal</span> <span class="token punctuation">{</span>
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aria-label="instanceof关键字是如何实现的"><!---->instanceof关键字是如何实现的<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.11 并发编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java重写（Overriding）时应当遵守的11条规则</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 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0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><meta property="articleSection" content="Java核心"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 7 分钟</span><meta property="timeRequired" content="PT7M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/basic-extra-meal/Overriding.html#_01、什么是重写" class="router-link-active router-link-exact-active toc-link level3">01、什么是重写？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-extra-meal/Overriding.html#_02、哪些方法可以被重写" class="router-link-active router-link-exact-active toc-link level3">02、哪些方法可以被重写？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-extra-meal/Overriding.html#_03、哪些方法不能被重写" class="router-link-active router-link-exact-active toc-link level3">03、哪些方法不能被重写？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-extra-meal/Overriding.html#_04、重写方法的要求" class="router-link-active router-link-exact-active toc-link level3">04、重写方法的要求</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-extra-meal/Overriding.html#_05、如何调用被重写的方法" class="router-link-active router-link-exact-active toc-link level3">05、如何调用被重写的方法？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-extra-meal/Overriding.html#_06、重写和构造方法" class="router-link-active router-link-exact-active toc-link level3">06、重写和构造方法</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-extra-meal/Overriding.html#_07、重写和抽象方法" class="router-link-active router-link-exact-active toc-link level3">07、重写和抽象方法</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-extra-meal/Overriding.html#_08、重写和-synchronized-方法" class="router-link-active router-link-exact-active toc-link level3">08、重写和 synchronized 方法</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-extra-meal/Overriding.html#_09、重写和-strictfp-方法" class="router-link-active router-link-exact-active toc-link level3">09、重写和 strictfp 方法</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="java重写-overriding-时应当遵守的11条规则" tabindex="-1"><a class="header-anchor" href="#java重写-overriding-时应当遵守的11条规则" aria-hidden="true">#</a> Java重写（Overriding）时应当遵守的11条规则</h1><p>重写（Overriding）算是 Java 中一个非常重要的概念，理解重写到底是什么对每个 Java 程序员来说都至关重要，这篇文章就来给大家说说重写过程中应当遵守的 12 条规则。</p><h3 id="_01、什么是重写" tabindex="-1"><a class="header-anchor" href="#_01、什么是重写" aria-hidden="true">#</a> 01、什么是重写？</h3><p>重写带来了一种非常重要的能力，可以让子类重新实现从超类那继承过来的方法。在下面这幅图中，Animal 是父类，Dog 是子类，Dog 重新实现了 <code>move()</code> 方法用来和父类进行区分，毕竟狗狗跑起来还是比较有特色的。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/basic-extra-meal/Overriding-1.png" alt=""></p><p>重写的方法和被重写的方法，不仅方法名相同，参数也相同，只不过，方法体有所不同。</p><h3 id="_02、哪些方法可以被重写" tabindex="-1"><a class="header-anchor" href="#_02、哪些方法可以被重写" aria-hidden="true">#</a> 02、哪些方法可以被重写？</h3><p><strong>规则一：只能重写继承过来的方法</strong>。</p><p>因为重写是在子类重新实现从父类继承过来的方法时发生的，所以只能重写继承过来的方法，这很好理解。这就意味着，只能重写那些被 public、protected 或者 default 修饰的方法，private 修饰的方法无法被重写。</p><p>Animal 类有 <code>move()</code>、<code>eat()</code> 和 <code>sleep()</code> 三个方法：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">Animal</span> <span class="token punctuation">{</span>
     <span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">move</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span> <span class="token punctuation">}</span>
 
     <span class="token keyword">protected</span> <span class="token keyword">void</span> <span class="token function">eat</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span> <span class="token punctuation">}</span>
@@ -137,6 +137,6 @@
     <span class="token keyword">protected</span> <span class="token keyword">void</span> <span class="token function">bark</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span><span class="token punctuation">}</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="_08、重写和-synchronized-方法" tabindex="-1"><a class="header-anchor" href="#_08、重写和-synchronized-方法" aria-hidden="true">#</a> 08、重写和 synchronized 方法</h3><p><strong>规则十：synchronized 关键字对重写规则没有任何影响</strong>。</p><p>synchronized 关键字用于在多线程环境中获取和释放监听对象，因此它对重写规则没有任何影响，这就意味着 synchronized 方法可以去重写一个非同步方法。</p><h3 id="_09、重写和-strictfp-方法" tabindex="-1"><a class="header-anchor" href="#_09、重写和-strictfp-方法" aria-hidden="true">#</a> 09、重写和 strictfp 方法</h3><p><strong>规则十一：strictfp 关键字对重写规则没有任何影响</strong>。</p><p>如果你想让浮点运算更加精确，而且不会因为硬件平台的不同导致执行的结果不一致的话，可以在方法上添加 strictfp 关键字。因此 strictfp 关键和重写规则无关。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/basic-extra-meal/Overriding.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/14 上午7:14:28</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/basic-extra-meal/override-overload.html" class="nav-link prev" aria-label="重写和重载的区别"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->重写和重载的区别</div></a><a href="/basic-extra-meal/pass-by-value.html" class="nav-link next" aria-label="Java到底是值传递还是引用传递"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">Java到底是值传递还是引用传递<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->深入理解Java注解</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 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property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 6 分钟</span><meta property="timeRequired" content="PT6M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="深入理解java注解" tabindex="-1"><a class="header-anchor" href="#深入理解java注解" aria-hidden="true">#</a> 深入理解Java注解</h1><p>“二哥，这节讲注解吗？”三妹问。</p><p>“是的。”我说，“注解是 Java 中非常重要的一部分，但经常被忽视也是真的。之所以这么说是因为我们更倾向成为一名注解的使用者而不是创建者。<code>@Override</code> 注解用过吧？但你知道怎么自定义一个注解吗？”</p><p>三妹毫不犹豫地摇摇头，摆摆手，不好意思地承认自己的确没有自定义过。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/annotation/annotation-01.png" alt=""></p><p>“好吧，哥来告诉你吧。”</p><p>注解（Annotation）是在 Java 1.5 时引入的概念，同 class 和 interface 一样，也属于一种类型。注解提供了一系列数据用来装饰程序代码（类、方法、字段等），但是注解并不是所装饰代码的一部分，它对代码的运行效果没有直接影响，由编译器决定该执行哪些操作。</p><p>来看一段代码。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">AutowiredTest</span> <span class="token punctuation">{</span>
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href="/oo/inner-class.html" class="nav-link sidebar-link sidebar-page" aria-label="内部类"><!---->内部类<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/oo/static.html" class="nav-link sidebar-link sidebar-page" aria-label="static"><!---->static<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/oo/this-super.html" class="nav-link sidebar-link sidebar-page" aria-label="this 和 super"><!---->this 和 super<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/oo/final.html" class="nav-link sidebar-link sidebar-page" aria-label="final"><!---->final<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/oo/instanceof.html" class="nav-link sidebar-link sidebar-page" aria-label="instanceof"><!---->instanceof<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-extra-meal/immutable.html" class="nav-link sidebar-link sidebar-page" aria-label="不可变对象"><!---->不可变对象<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-extra-meal/varables.html" class="nav-link sidebar-link sidebar-page" aria-label="可变参数"><!---->可变参数<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-extra-meal/generic.html" class="nav-link sidebar-link sidebar-page" aria-label="泛型"><!---->泛型<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/basic-extra-meal/annotation.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="注解"><!---->注解<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-extra-meal/enum.html" class="nav-link sidebar-link sidebar-page" aria-label="枚举"><!---->枚举<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-extra-meal/fanshe.html" class="nav-link sidebar-link sidebar-page" aria-label="反射"><!---->反射<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.4 字符串&amp;数组</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.5 集合框架（容器）</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.6 IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.11 并发编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->深入理解Java注解</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2021年10月22日</span><meta property="datePublished" content="2021-10-22T07:22:10.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><meta property="articleSection" content="Java核心"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 6 分钟</span><meta property="timeRequired" content="PT6M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="深入理解java注解" tabindex="-1"><a class="header-anchor" href="#深入理解java注解" aria-hidden="true">#</a> 深入理解Java注解</h1><p>“二哥，这节讲注解吗？”三妹问。</p><p>“是的。”我说，“注解是 Java 中非常重要的一部分，但经常被忽视也是真的。之所以这么说是因为我们更倾向成为一名注解的使用者而不是创建者。<code>@Override</code> 注解用过吧？但你知道怎么自定义一个注解吗？”</p><p>三妹毫不犹豫地摇摇头，摆摆手，不好意思地承认自己的确没有自定义过。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/annotation/annotation-01.png" alt=""></p><p>“好吧，哥来告诉你吧。”</p><p>注解（Annotation）是在 Java 1.5 时引入的概念，同 class 和 interface 一样，也属于一种类型。注解提供了一系列数据用来装饰程序代码（类、方法、字段等），但是注解并不是所装饰代码的一部分，它对代码的运行效果没有直接影响，由编译器决定该执行哪些操作。</p><p>来看一段代码。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">AutowiredTest</span> <span class="token punctuation">{</span>
     <span class="token annotation punctuation">@Autowired</span>
     <span class="token keyword">private</span> <span class="token class-name">String</span> name<span class="token punctuation">;</span>
 
@@ -119,6 +119,6 @@
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>程序输出结果如下：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>{&quot;bookName&quot;:&quot;Web全栈开发进阶之路&quot;,&quot;writerName&quot;:&quot;沉默王二&quot;}
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>从结果上来看：</p><p>1）Writer 类的 age 字段没有装饰 <code>@JsonField</code> 注解，所以没有序列化。</p><p>2）Writer 类的 name 字段装饰了 <code>@JsonField</code> 注解，并且显示指定了字符串“writerName”，所以序列化后变成了 writerName。</p><p>3）Writer 类的 bookName 字段装饰了 <code>@JsonField</code> 注解，但没有显式指定值，所以序列化后仍然是 bookName。</p><p>“怎么样，三妹，是不是也不是特别难？”我对三妹说。</p><p>“撸个注解好像真没什么难度，但你接下来的那个 JsonSerializer 我还需要再消化一下。”三妹很认真地说。</p><p>“嗯，你好好复习下，我看会《编译原理》。”说完我拿起桌子边上的一本书就走了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/basic-extra-meal/annotation.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/14 上午7:14:28</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/basic-extra-meal/generic.html" class="nav-link prev" aria-label="泛型"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->泛型</div></a><a href="/basic-extra-meal/enum.html" class="nav-link next" aria-label="枚举"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">枚举<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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diff --git a/dist/basic-extra-meal/box.html b/dist/basic-extra-meal/box.html
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class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->深入剖析Java中的拆箱和装箱</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" 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aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 9 分钟</span><meta property="timeRequired" content="PT9M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="深入剖析java中的拆箱和装箱" tabindex="-1"><a class="header-anchor" href="#深入剖析java中的拆箱和装箱" aria-hidden="true">#</a> 深入剖析Java中的拆箱和装箱</h1><p>“哥，听说 Java 的每个基本类型都对应了一个包装类型，比如说 int 的包装类型为 Integer，double 的包装类型为 Double，是这样吗？”从三妹这句话当中，能听得出来，她已经提前预习这块内容了。</p><p>“是的，三妹。基本类型和包装类型的区别主要有以下 4 点，我来带你学习一下。”我回答说。我们家的斜对面刚好是一所小学，所以时不时还能听到朗朗的读书声，让人心情非常愉快。</p><p>“三妹，你准备好了吗？我们开始吧。”</p><p>“第一，<strong>包装类型可以为 null，而基本类型不可以</strong>。别小看这一点区别，它使得包装类型可以应用于 POJO 中，而基本类型则不行。”</p><p>“POJO 是什么呢？”遇到不会的就问，三妹在这一点上还是非常兢兢业业的。</p><p>“POJO 的英文全称是 Plain Ordinary Java Object，翻译一下就是，简单无规则的 Java 对象，只有字段以及对应的 setter 和 getter 方法。”</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">class</span> <span class="token class-name">Writer</span> <span class="token punctuation">{</span>
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href="/basic-extra-meal/java-unicode.html" class="nav-link sidebar-link sidebar-page" aria-label="Unicode和UTF-8编码"><!---->Unicode和UTF-8编码<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-extra-meal/int-cache.html" class="nav-link sidebar-link sidebar-page" aria-label="new Integer和Integer.valueOf区别"><!---->new Integer和Integer.valueOf区别<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/basic-extra-meal/box.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="拆箱和装箱"><!---->拆箱和装箱<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-extra-meal/deep-copy.html" class="nav-link sidebar-link sidebar-page" aria-label="浅拷贝与深拷贝"><!---->浅拷贝与深拷贝<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-extra-meal/hashcode.html" class="nav-link sidebar-link sidebar-page" 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class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->深入剖析Java中的拆箱和装箱</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 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106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><meta property="articleSection" content="Java核心"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 9 分钟</span><meta property="timeRequired" content="PT9M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="深入剖析java中的拆箱和装箱" tabindex="-1"><a class="header-anchor" href="#深入剖析java中的拆箱和装箱" aria-hidden="true">#</a> 深入剖析Java中的拆箱和装箱</h1><p>“哥，听说 Java 的每个基本类型都对应了一个包装类型，比如说 int 的包装类型为 Integer，double 的包装类型为 Double，是这样吗？”从三妹这句话当中，能听得出来，她已经提前预习这块内容了。</p><p>“是的，三妹。基本类型和包装类型的区别主要有以下 4 点，我来带你学习一下。”我回答说。我们家的斜对面刚好是一所小学，所以时不时还能听到朗朗的读书声，让人心情非常愉快。</p><p>“三妹，你准备好了吗？我们开始吧。”</p><p>“第一，<strong>包装类型可以为 null，而基本类型不可以</strong>。别小看这一点区别，它使得包装类型可以应用于 POJO 中，而基本类型则不行。”</p><p>“POJO 是什么呢？”遇到不会的就问，三妹在这一点上还是非常兢兢业业的。</p><p>“POJO 的英文全称是 Plain Ordinary Java Object，翻译一下就是，简单无规则的 Java 对象，只有字段以及对应的 setter 和 getter 方法。”</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">class</span> <span class="token class-name">Writer</span> <span class="token punctuation">{</span>
 	<span class="token keyword">private</span> <span class="token class-name">Integer</span> age<span class="token punctuation">;</span>
 	<span class="token keyword">private</span> <span class="token class-name">String</span> name<span class="token punctuation">;</span>
 
@@ -135,6 +135,6 @@ d <span class="token operator">=</span> <span class="token number">200</span><sp
 <span class="token keyword">long</span> t2 <span class="token operator">=</span> <span class="token class-name">System</span><span class="token punctuation">.</span><span class="token function">currentTimeMillis</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>        
 <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span>t2<span class="token operator">-</span>t1<span class="token punctuation">)</span><span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>“知道为什么吗？三妹。”</p><p>“难道是因为 sum 被声明成了包装类型 Long 而不是基本类型 long。”三妹若有所思。</p><p>“是滴，由于 sum 是个 Long 型，而 i 为 int 类型，<code>sum += i</code> 在执行的时候，会先把 i 强转为 long 型，然后再把 sum 拆箱为 long 型进行相加操作，之后再自动装箱为 Long 型赋值给 sum。”</p><p>“三妹，你可以试一下，把 sum 换成 long 型比较一下它们运行的时间。”</p><p>。。。。。。</p><p>“哇，sum 为 Long 型的时候，足足运行了 5825 毫秒；sum 为 long 型的时候，只需要 679 毫秒。”</p><p>“好了，三妹，今天的主题就先讲到这吧。我再去来根华子。”</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/basic-extra-meal/box.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/14 上午7:14:28</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/basic-extra-meal/int-cache.html" class="nav-link prev" aria-label="new Integer和Integer.valueOf区别"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->new Integer和Integer.valueOf区别</div></a><a href="/basic-extra-meal/deep-copy.html" class="nav-link next" aria-label="浅拷贝与深拷贝"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">浅拷贝与深拷贝<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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diff --git a/dist/basic-extra-meal/class-object.html b/dist/basic-extra-meal/class-object.html
index 890db6f6..f7194fa6 100644
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class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->先有Class还是先有Object？</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 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aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 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aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 5 分钟</span><meta property="timeRequired" content="PT5M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="先有class还是先有object" tabindex="-1"><a class="header-anchor" href="#先有class还是先有object" aria-hidden="true">#</a> 先有Class还是先有Object？</h1><p>Java 对象模型中：</p><ul><li>所有的类都是Class类的实例，Object是类，那么Object也是Class类的一个实例。</li><li>所有的类都最终继承自Object类，Class是类，那么Class也继承自Object。</li></ul><p>那到底是先有Class还是先有Object？ JVM 是怎么处理这个“鸡·蛋”问题呢？</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/basic-extra-meal/class-object-2f47490c-70b8-41b8-9551-42c2f98eea91.png" alt=""></p><p>针对这个问题，我在知乎上看到了 R 大的一个回答，正好解答了我心中的疑惑，就分享出来给各位小伙伴一个参考和启发~</p><blockquote><p>作者：RednaxelaFX，整理：沉默王二，参考链接：https://www.zhihu.com/question/30301819/answer/47539163</p></blockquote><hr><p>“鸡・蛋”问题通常都是通过一种叫“自举”（bootstrap）的过程来解决的。</p><p>“鸡蛋问题”的根本矛盾就在于假定了“鸡”或“蛋”的其中一个要先进入“完全可用”的状态。而许多现实中被简化为“鸡蛋问题”的情况实际可以在“混沌”中把“鸡”和“蛋”都初始化好，而不存在先后问题；在它们初始化的过程中，两者都不处于“完全可用”状态，而完成初始化后它们就同时都进入了可用状态。</p><p>打个比方，番茄炒蛋。并不是要先把番茄完全炒好，然后把鸡蛋完全炒好，然后把它们混起来；而是先炒番茄炒到半熟，再炒鸡蛋炒到半熟，然后把两个半熟的部分混在一起同时炒熟。</p><p>对于<strong>先有Class还是先有Object</strong>这个问题来说，题主假设所有的类都是Class类的实例，Object是类，那么Object也是Class类的一个实例，这个假设就是错的。</p><p><code>java.lang.Object</code>是一个Java类，但并不是<code>java.lang.Class</code>的一个实例。后者只是一个用于描述Java类与接口的、用于支持反射操作的类型。这点上Java跟其它一些更纯粹的面向对象语言（例如Python和Ruby）不同。</p><p>第二个假设“所有的类都最终继承自Object类，Class是类，那么Class也继承自Object”是对的，<code>java.lang.Class</code>是<code>java.lang.Object</code>的派生类，前者继承自后者。</p><p>虽然第1个假设不对，但“鸡蛋问题”仍然存在：在一个已经启动完毕、可以使用的Java对象系统里，必须要有一个<code>java.lang.Class</code>实例对应<code>java.lang.Object</code>这个类；而<code>java.lang.Class</code>是<code>java.lang.Object</code>的派生类，按“一般思维”，前者应该要在后者完成初始化之后才可以初始化…</p><p>事实是：这些相互依赖的核心类型完全可以在“混沌”中一口气都初始化好，然后对象系统的状态才叫做完成了“bootstrap”，后面就可以按照Java对象系统的一般规则去运行。JVM、JavaScript、Python、Ruby等的运行时都有这样的bootstrap过程。</p><p>在“混沌”（boostrap过程）里，JVM可以为对象系统中最重要的一些核心类型先分配好内存空间，让它们进入[已分配空间]但[尚未完全初始化]状态。</p><p>此时这些对象虽然已经分配了空间，但因为状态还不完整所以尚不可使用。然后，通过这些分配好的空间把这些核心类型之间的引用关系串好。</p><p>到此为止所有动作都由JVM完成，尚未执行任何Java字节码。然后这些核心类型就进入了[完全初始化]状态，对象系统就可以开始自我运行下去，也就是可以开始执行Java字节码来进一步完成Java系统的初始化了。</p><p>在HotSpot VM里，有一个叫做“Universe”的C++类用于记录对象系统的总体状态。它有这么两个有趣的字段记录当前是处于bootstrapping阶段还是已经完全初始化好：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>static bool is_bootstrapping()                      { return _bootstrapping; }
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class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->先有Class还是先有Object？</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 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106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><meta property="articleSection" content="Java核心"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 5 分钟</span><meta property="timeRequired" content="PT5M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="先有class还是先有object" tabindex="-1"><a class="header-anchor" href="#先有class还是先有object" aria-hidden="true">#</a> 先有Class还是先有Object？</h1><p>Java 对象模型中：</p><ul><li>所有的类都是Class类的实例，Object是类，那么Object也是Class类的一个实例。</li><li>所有的类都最终继承自Object类，Class是类，那么Class也继承自Object。</li></ul><p>那到底是先有Class还是先有Object？ JVM 是怎么处理这个“鸡·蛋”问题呢？</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/basic-extra-meal/class-object-2f47490c-70b8-41b8-9551-42c2f98eea91.png" alt=""></p><p>针对这个问题，我在知乎上看到了 R 大的一个回答，正好解答了我心中的疑惑，就分享出来给各位小伙伴一个参考和启发~</p><blockquote><p>作者：RednaxelaFX，整理：沉默王二，参考链接：https://www.zhihu.com/question/30301819/answer/47539163</p></blockquote><hr><p>“鸡・蛋”问题通常都是通过一种叫“自举”（bootstrap）的过程来解决的。</p><p>“鸡蛋问题”的根本矛盾就在于假定了“鸡”或“蛋”的其中一个要先进入“完全可用”的状态。而许多现实中被简化为“鸡蛋问题”的情况实际可以在“混沌”中把“鸡”和“蛋”都初始化好，而不存在先后问题；在它们初始化的过程中，两者都不处于“完全可用”状态，而完成初始化后它们就同时都进入了可用状态。</p><p>打个比方，番茄炒蛋。并不是要先把番茄完全炒好，然后把鸡蛋完全炒好，然后把它们混起来；而是先炒番茄炒到半熟，再炒鸡蛋炒到半熟，然后把两个半熟的部分混在一起同时炒熟。</p><p>对于<strong>先有Class还是先有Object</strong>这个问题来说，题主假设所有的类都是Class类的实例，Object是类，那么Object也是Class类的一个实例，这个假设就是错的。</p><p><code>java.lang.Object</code>是一个Java类，但并不是<code>java.lang.Class</code>的一个实例。后者只是一个用于描述Java类与接口的、用于支持反射操作的类型。这点上Java跟其它一些更纯粹的面向对象语言（例如Python和Ruby）不同。</p><p>第二个假设“所有的类都最终继承自Object类，Class是类，那么Class也继承自Object”是对的，<code>java.lang.Class</code>是<code>java.lang.Object</code>的派生类，前者继承自后者。</p><p>虽然第1个假设不对，但“鸡蛋问题”仍然存在：在一个已经启动完毕、可以使用的Java对象系统里，必须要有一个<code>java.lang.Class</code>实例对应<code>java.lang.Object</code>这个类；而<code>java.lang.Class</code>是<code>java.lang.Object</code>的派生类，按“一般思维”，前者应该要在后者完成初始化之后才可以初始化…</p><p>事实是：这些相互依赖的核心类型完全可以在“混沌”中一口气都初始化好，然后对象系统的状态才叫做完成了“bootstrap”，后面就可以按照Java对象系统的一般规则去运行。JVM、JavaScript、Python、Ruby等的运行时都有这样的bootstrap过程。</p><p>在“混沌”（boostrap过程）里，JVM可以为对象系统中最重要的一些核心类型先分配好内存空间，让它们进入[已分配空间]但[尚未完全初始化]状态。</p><p>此时这些对象虽然已经分配了空间，但因为状态还不完整所以尚不可使用。然后，通过这些分配好的空间把这些核心类型之间的引用关系串好。</p><p>到此为止所有动作都由JVM完成，尚未执行任何Java字节码。然后这些核心类型就进入了[完全初始化]状态，对象系统就可以开始自我运行下去，也就是可以开始执行Java字节码来进一步完成Java系统的初始化了。</p><p>在HotSpot VM里，有一个叫做“Universe”的C++类用于记录对象系统的总体状态。它有这么两个有趣的字段记录当前是处于bootstrapping阶段还是已经完全初始化好：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>static bool is_bootstrapping()                      { return _bootstrapping; }
 static bool is_fully_initialized()                  { return _fully_initialized; }
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><p>然后<code>Universe::genesis()</code>函数会在bootstrap阶段中创建核心类型的对象模型，其中会调用<code>SystemDictionary::initialize()</code>来初始化对象系统的核心类型，其中会进一步跑到<code>SystemDictionary::initialize_preloaded_classes()</code>来创建<code>java.lang.Object</code>、<code>java.lang.Class</code>等核心类型。</p><p>这个函数在加载了<code>java.lang.Object</code>、<code>java.lang.Class</code>等核心类型后会调用<code>Universe::fixup_mirrors()</code>来完成前面说的“把引用关系串起来”的动作：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>// Fixup mirrors for classes loaded before java.lang.Class.
 // These calls iterate over the objects currently in the perm gen
@@ -64,6 +64,6 @@ void Universe::fixup_mirrors(TRAPS) {
 http://hg.openjdk.java.net/jdk8u/jdk8u/hotspot/file/ade5be2b1758/src/share/vm/memory/universe.cpp#l259
 http://hg.openjdk.java.net/jdk8u/jdk8u/hotspot/file/ade5be2b1758/src/share/vm/classfile/systemDictionary.cpp#l1814
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>分享的最后，二哥要简单说两句，每次看 R 大的内容，总是感觉膝盖忍不住要跪一下，只能说写过 JVM 的男人就是不一样。喜欢研究 CPP 源码的话小伙伴可以再深入学习下，一定会有所收获。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/basic-extra-meal/class-object.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/12 下午4:24:21</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/basic-extra-meal/jdk-while-for-wuxian-xunhuan.html" class="nav-link prev" aria-label="JDK源码无限循环用for(;;)还是while(true)"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->JDK源码无限循环用for(;;)还是while(true)</div></a><a href="/basic-extra-meal/instanceof-jvm.html" class="nav-link next" aria-label="instanceof关键字是如何实现的"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">instanceof关键字是如何实现的<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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href="/basic-extra-meal/jdk-while-for-wuxian-xunhuan.html" class="nav-link sidebar-link sidebar-page" aria-label="JDK源码无限循环用for(;;)还是while(true)"><!---->JDK源码无限循环用for(;;)还是while(true)<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-extra-meal/class-object.html" class="nav-link sidebar-link sidebar-page" aria-label="先有Class还是先有Object"><!---->先有Class还是先有Object<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-extra-meal/instanceof-jvm.html" class="nav-link sidebar-link sidebar-page" aria-label="instanceof关键字是如何实现的"><!---->instanceof关键字是如何实现的<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.11 并发编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->详解Java中Comparable和Comparator的区别</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2021年11月8日</span><meta property="datePublished" content="2021-11-08T13:04:25.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 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class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/basic-extra-meal/comparable-omparator.html#_01、comparable" class="router-link-active router-link-exact-active toc-link level3">01、Comparable</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-extra-meal/comparable-omparator.html#_02、comparator" class="router-link-active router-link-exact-active toc-link level3">02、Comparator</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-extra-meal/comparable-omparator.html#_03、到底该用哪一个呢" class="router-link-active router-link-exact-active toc-link level3">03、到底该用哪一个呢？</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="详解java中comparable和comparator的区别" tabindex="-1"><a class="header-anchor" href="#详解java中comparable和comparator的区别" aria-hidden="true">#</a> 详解Java中Comparable和Comparator的区别</h1><p>那天，小二去马蜂窝面试，面试官老王一上来就甩给了他一道面试题：请问Comparable和Comparator有什么区别？小二差点笑出声，因为三年前，也就是 2021 年，他在《Java 程序员进阶之路》专栏上看到过这题😆。</p><p>Comparable 和 Comparator 是 Java 的两个接口，从名字上我们就能够读出来它们俩的相似性：以某种方式来比较两个对象。但它们之间到底有什么区别呢？请随我来，打怪进阶喽！</p><h3 id="_01、comparable" tabindex="-1"><a class="header-anchor" href="#_01、comparable" aria-hidden="true">#</a> 01、Comparable</h3><p>Comparable 接口的定义非常简单，源码如下所示。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">interface</span> <span class="token class-name">Comparable</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">T</span><span class="token punctuation">&gt;</span></span> <span class="token punctuation">{</span>
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right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow 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354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 4 分钟</span><meta property="timeRequired" content="PT4M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/basic-extra-meal/comparable-omparator.html#_01、comparable" class="router-link-active router-link-exact-active toc-link level3">01、Comparable</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-extra-meal/comparable-omparator.html#_02、comparator" class="router-link-active router-link-exact-active toc-link level3">02、Comparator</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-extra-meal/comparable-omparator.html#_03、到底该用哪一个呢" class="router-link-active router-link-exact-active toc-link level3">03、到底该用哪一个呢？</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="详解java中comparable和comparator的区别" tabindex="-1"><a class="header-anchor" href="#详解java中comparable和comparator的区别" aria-hidden="true">#</a> 详解Java中Comparable和Comparator的区别</h1><p>那天，小二去马蜂窝面试，面试官老王一上来就甩给了他一道面试题：请问Comparable和Comparator有什么区别？小二差点笑出声，因为三年前，也就是 2021 年，他在《Java 程序员进阶之路》专栏上看到过这题😆。</p><p>Comparable 和 Comparator 是 Java 的两个接口，从名字上我们就能够读出来它们俩的相似性：以某种方式来比较两个对象。但它们之间到底有什么区别呢？请随我来，打怪进阶喽！</p><h3 id="_01、comparable" tabindex="-1"><a class="header-anchor" href="#_01、comparable" aria-hidden="true">#</a> 01、Comparable</h3><p>Comparable 接口的定义非常简单，源码如下所示。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">interface</span> <span class="token class-name">Comparable</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">T</span><span class="token punctuation">&gt;</span></span> <span class="token punctuation">{</span>
     <span class="token keyword">int</span> <span class="token function">compareTo</span><span class="token punctuation">(</span><span class="token class-name">T</span> t<span class="token punctuation">)</span><span class="token punctuation">;</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>如果一个类实现了 Comparable 接口（只需要干一件事，重写 <code>compareTo()</code> 方法），就可以按照自己制定的规则将由它创建的对象进行比较。下面给出一个例子。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">Cmower</span> <span class="token keyword">implements</span> <span class="token class-name">Comparable</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">Cmower</span><span class="token punctuation">&gt;</span></span> <span class="token punctuation">{</span>
@@ -118,6 +118,6 @@ list<span class="token punctuation">.</span><span class="token function">sort</s
 沉默王二
 沉默王一
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>这意味着沉默王三的年纪比沉默王二小，排在第一位；沉默王一的年纪比沉默王二大，排在第三位。和我们的预期完全符合。</p><h3 id="_03、到底该用哪一个呢" tabindex="-1"><a class="header-anchor" href="#_03、到底该用哪一个呢" aria-hidden="true">#</a> 03、到底该用哪一个呢？</h3><p>通过上面的两个例子可以比较出 Comparable 和 Comparator 两者之间的区别：</p><ul><li>一个类实现了 Comparable 接口，意味着该类的对象可以直接进行比较（排序），但比较（排序）的方式只有一种，很单一。</li><li>一个类如果想要保持原样，又需要进行不同方式的比较（排序），就可以定制比较器（实现 Comparator 接口）。</li><li>Comparable 接口在 <code>java.lang</code> 包下，而 <code>Comparator</code> 接口在 <code>java.util</code> 包下，算不上是亲兄弟，但可以称得上是表（堂）兄弟。</li></ul><p>举个不恰当的例子。我想从洛阳出发去北京看长城，体验一下好汉的感觉，要么坐飞机，要么坐高铁；但如果是孙悟空的话，翻个筋斗就到了。我和孙悟空之间有什么区别呢？孙悟空自己实现了 Comparable 接口（他那年代也没有飞机和高铁，没得选），而我可以借助 Comparator 接口（现代化的交通工具）。</p><hr><p>好了，关于 Comparable 和 Comparator 我们就先聊这么多。总而言之，如果对象的排序需要基于自然顺序，请选择 <code>Comparable</code>，如果需要按照对象的不同属性进行排序，请选择 <code>Comparator</code>。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/basic-extra-meal/comparable-omparator.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/14 上午7:14:28</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/basic-extra-meal/true-generic.html" class="nav-link prev" aria-label="Java为什么不能实现真正的泛型"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->Java为什么不能实现真正的泛型</div></a><a href="/basic-extra-meal/jdk9-char-byte-string.html" class="nav-link next" aria-label="JDK9中String为什么由char[]改成byte[]"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">JDK9中String为什么由char[]改成byte[]<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 9 分钟</span><meta property="timeRequired" content="PT9M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="彻底讲明白的java浅拷贝与深拷贝" tabindex="-1"><a class="header-anchor" href="#彻底讲明白的java浅拷贝与深拷贝" aria-hidden="true">#</a> 彻底讲明白的Java浅拷贝与深拷贝</h1><p>“哥，听说浅拷贝和深拷贝是 Java 面试中经常会被问到的一个问题，是这样吗？”</p><p>“还真的是，而且了解浅拷贝和深拷贝的原理，对 Java 是值传递还是引用传递也会有更深的理解。”我肯定地回答。</p><p>“不管是浅拷贝还是深拷贝，都可以通过调用 Object 类的 <code>clone()</code> 方法来完成。”我一边说，一边打开 Intellij IDEA，并找到了 <code>clone()</code> 方法的源码。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token annotation punctuation">@HotSpotIntrinsicCandidate</span>
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class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->彻底讲明白的Java浅拷贝与深拷贝</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2021年10月22日</span><meta property="datePublished" content="2021-10-22T07:22:10.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><meta property="articleSection" content="Java核心"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 9 分钟</span><meta property="timeRequired" content="PT9M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="彻底讲明白的java浅拷贝与深拷贝" tabindex="-1"><a class="header-anchor" href="#彻底讲明白的java浅拷贝与深拷贝" aria-hidden="true">#</a> 彻底讲明白的Java浅拷贝与深拷贝</h1><p>“哥，听说浅拷贝和深拷贝是 Java 面试中经常会被问到的一个问题，是这样吗？”</p><p>“还真的是，而且了解浅拷贝和深拷贝的原理，对 Java 是值传递还是引用传递也会有更深的理解。”我肯定地回答。</p><p>“不管是浅拷贝还是深拷贝，都可以通过调用 Object 类的 <code>clone()</code> 方法来完成。”我一边说，一边打开 Intellij IDEA，并找到了 <code>clone()</code> 方法的源码。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token annotation punctuation">@HotSpotIntrinsicCandidate</span>
 <span class="token keyword">protected</span> <span class="token keyword">native</span> <span class="token class-name">Object</span> <span class="token function">clone</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token keyword">throws</span> <span class="token class-name">CloneNotSupportedException</span><span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><p>其中 <code>@HotSpotIntrinsicCandidate</code> 是 Java 9 引入的一个注解，被它标注的方法，在 HotSpot 虚拟机中会有一套高效的实现。需要注意的是，<code>clone()</code> 方法同时是一个本地（<code>native</code>）方法，它的具体实现会交给 HotSpot 虚拟机，那就意味着虚拟机在运行该方法的时候，会将其替换为更高效的 C/C++ 代码，进而调用操作系统去完成对象的克隆工作。</p><p>“哥，那你就先说浅拷贝吧！”</p><p>“好的呀。直接上实战代码。”</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">class</span> <span class="token class-name">Writer</span> <span class="token keyword">implements</span> <span class="token class-name">Cloneable</span><span class="token punctuation">{</span>
     <span class="token keyword">private</span> <span class="token keyword">int</span> age<span class="token punctuation">;</span>
@@ -287,6 +287,6 @@ writer2.book 变更后：
 writer1：Writer@9629756 age=18, name=&#39;二哥&#39;, book=Book@735b5592 bookName=&#39;编译原理&#39;, price=100}}
 writer2：Writer@544fe44c age=18, name=&#39;二哥&#39;, book=Book@31610302 bookName=&#39;永恒的图灵&#39;, price=70}}
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>测试结果和之前用 <code>clone()</code> 方法实现的深拷贝类似。</p><p>“不过，三妹，需要注意，由于是序列化涉及到输入流和输出流的读写，在性能上要比 HotSpot 虚拟机实现的 <code>clone()</code> 方法差很多。”我语重心长地说。</p><p>“好的，二哥，你先去休息吧，让我来琢磨一会，总结一下浅拷贝和深拷贝之间的差异。”</p><p>“嗯嗯。”</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/basic-extra-meal/deep-copy.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/31 下午5:56:13</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/basic-extra-meal/box.html" class="nav-link prev" aria-label="拆箱和装箱"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->拆箱和装箱</div></a><a href="/basic-extra-meal/hashcode.html" class="nav-link next" aria-label="深入理解Java中的hashCode方法"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">深入理解Java中的hashCode方法<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java枚举（enum）</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 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property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 6 分钟</span><meta property="timeRequired" content="PT6M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="java枚举-enum" tabindex="-1"><a class="header-anchor" href="#java枚举-enum" aria-hidden="true">#</a> Java枚举（enum）</h1><p>“今天我们来学习枚举吧，三妹！”我说，“同学让你去她家玩了两天，感觉怎么样呀？”</p><p>“心情放松了不少。”三妹说，“可以开始学 Java 了，二哥。”</p><p>“OK。”</p><p>“枚举（enum），是 Java 1.5 时引入的关键字，它表示一种特殊类型的类，继承自 java.lang.Enum。”</p><p>“我们来新建一个枚举 PlayerType。”</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">enum</span> <span class="token class-name">PlayerType</span> <span class="token punctuation">{</span>
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class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java枚举（enum）</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 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viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 6 分钟</span><meta property="timeRequired" content="PT6M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="java枚举-enum" tabindex="-1"><a class="header-anchor" href="#java枚举-enum" aria-hidden="true">#</a> Java枚举（enum）</h1><p>“今天我们来学习枚举吧，三妹！”我说，“同学让你去她家玩了两天，感觉怎么样呀？”</p><p>“心情放松了不少。”三妹说，“可以开始学 Java 了，二哥。”</p><p>“OK。”</p><p>“枚举（enum），是 Java 1.5 时引入的关键字，它表示一种特殊类型的类，继承自 java.lang.Enum。”</p><p>“我们来新建一个枚举 PlayerType。”</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">enum</span> <span class="token class-name">PlayerType</span> <span class="token punctuation">{</span>
     TENNIS<span class="token punctuation">,</span>
     FOOTBALL<span class="token punctuation">,</span>
     BASKETBALL
@@ -176,6 +176,6 @@ true
     INSTANCE<span class="token punctuation">;</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>“就这？”三妹睁大了眼睛。</p><p>“对啊，枚举默认实现了 Serializable 接口，因此 Java 虚拟机可以保证该类为单例，这与传统的实现方式不大相同。传统方式中，我们必须确保单例在反序列化期间不能创建任何新实例。”我说。</p><p>“好了，关于枚举就讲这么多吧，三妹，你把这些代码都手敲一遍吧！”</p><p>“好勒，这就安排。二哥，你去休息吧。”</p><p>“嗯嗯。”讲了这么多，必须跑去抽烟机那里安排一根华子了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/basic-extra-meal/enum.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/14 上午7:14:28</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/basic-extra-meal/annotation.html" class="nav-link prev" aria-label="注解"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->注解</div></a><a href="/basic-extra-meal/fanshe.html" class="nav-link next" aria-label="反射"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">反射<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->一次性搞清楚equals和hashCode</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 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106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><meta property="articleSection" content="Java核心"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 6 分钟</span><meta property="timeRequired" content="PT6M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="一次性搞清楚equals和hashcode" tabindex="-1"><a class="header-anchor" href="#一次性搞清楚equals和hashcode" aria-hidden="true">#</a> 一次性搞清楚equals和hashCode</h1><p>“二哥，我在读《Effective Java》 的时候，第 11 条规约说重写 equals 的时候必须要重写 hashCode 方法，这是为什么呀？”三妹单刀直入地问。</p><p>“三妹啊，这个问题问得非常好，因为它也是面试中经常考的一个知识点。今天哥就带你来梳理一下。”我说。</p><p>Java 是一门面向对象的编程语言，所有的类都会默认继承自 Object 类，而 Object 的中文意思就是“对象”。</p><p>Object 类中有这么两个方法：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">native</span> <span class="token keyword">int</span> <span class="token function">hashCode</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 
 <span class="token keyword">public</span> <span class="token keyword">boolean</span> <span class="token function">equals</span><span class="token punctuation">(</span><span class="token class-name">Object</span> obj<span class="token punctuation">)</span> <span class="token punctuation">{</span>
         <span class="token keyword">return</span> <span class="token punctuation">(</span><span class="token keyword">this</span> <span class="token operator">==</span> obj<span class="token punctuation">)</span><span class="token punctuation">;</span>
@@ -135,6 +135,6 @@
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>第二次循环：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>result = (31*1 + Integer(18).hashCode()) * 31 + String(&quot;张三&quot;).hashCode();
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>针对姓名年纪不同的对象，这样计算后的哈希值很难很难很难重复的；针对姓名年纪相同的对象，哈希值保持一致。</p><p>再次执行 main 方法，结果如下所示：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>98
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>因为此时 s1 和 s2 对象的哈希值都为 776408。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/core-points/equals-hashcode-02.png" alt=""></p><p>“每当重写 equals 方法时，hashCode 方法也需要重写，原因就是为了保证：如果两个对象调用 equals 方法返回的结果为 true，那么两个对象调用 hashCode 方法返回的结果也必然相同。”我点题了。</p><p>“OK，get 了。”三妹开心地点了点头，看得出来，今天学到了不少。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/basic-extra-meal/equals-hashcode.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/14 上午7:14:28</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/basic-extra-meal/hashcode.html" class="nav-link prev" aria-label="深入理解Java中的hashCode方法"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->深入理解Java中的hashCode方法</div></a><a href="/basic-extra-meal/override-overload.html" class="nav-link next" aria-label="重写和重载的区别"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">重写和重载的区别<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->大白话说Java反射：入门、使用、原理</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 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145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 7 分钟</span><meta property="timeRequired" content="PT7M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="大白话说java反射-入门、使用、原理" tabindex="-1"><a class="header-anchor" href="#大白话说java反射-入门、使用、原理" aria-hidden="true">#</a> 大白话说Java反射：入门、使用、原理</h1><p>“二哥，什么是反射呀？”三妹开门见山地问。</p><p>“要想知道什么是反射，就需要先来了解什么是‘正射’。”我笑着对三妹说，“一般情况下，我们在使用某个类之前已经确定它到底是个什么类了，拿到手就直接可以使用 <code>new</code> 关键字来调用构造方法进行初始化，之后使用这个类的对象来进行操作。”</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">Writer</span> writer <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">Writer</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/oo/construct.html" class="nav-link sidebar-link sidebar-page" aria-label="构造方法"><!---->构造方法<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/nice-article/bokeyuan-jianxijavazhongdifangwenquanxiankongzhi.html" class="nav-link sidebar-link sidebar-page" aria-label="访问权限控制"><!---->访问权限控制<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/oo/code-init.html" class="nav-link sidebar-link sidebar-page" aria-label="代码初始化块"><!---->代码初始化块<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/oo/abstract.html" class="nav-link sidebar-link sidebar-page" aria-label="抽象类"><!---->抽象类<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/oo/interface.html" class="nav-link sidebar-link sidebar-page" aria-label="接口"><!---->接口<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a 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aria-label="不可变对象"><!---->不可变对象<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-extra-meal/varables.html" class="nav-link sidebar-link sidebar-page" aria-label="可变参数"><!---->可变参数<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-extra-meal/generic.html" class="nav-link sidebar-link sidebar-page" aria-label="泛型"><!---->泛型<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-extra-meal/annotation.html" class="nav-link sidebar-link sidebar-page" aria-label="注解"><!---->注解<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-extra-meal/enum.html" class="nav-link sidebar-link sidebar-page" aria-label="枚举"><!---->枚举<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/basic-extra-meal/fanshe.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="反射"><!---->反射<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.4 字符串&amp;数组</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.5 集合框架（容器）</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.6 IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.11 并发编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->大白话说Java反射：入门、使用、原理</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2021年10月22日</span><meta property="datePublished" content="2021-10-22T07:22:10.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><meta property="articleSection" content="Java核心"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 7 分钟</span><meta property="timeRequired" content="PT7M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="大白话说java反射-入门、使用、原理" tabindex="-1"><a class="header-anchor" href="#大白话说java反射-入门、使用、原理" aria-hidden="true">#</a> 大白话说Java反射：入门、使用、原理</h1><p>“二哥，什么是反射呀？”三妹开门见山地问。</p><p>“要想知道什么是反射，就需要先来了解什么是‘正射’。”我笑着对三妹说，“一般情况下，我们在使用某个类之前已经确定它到底是个什么类了，拿到手就直接可以使用 <code>new</code> 关键字来调用构造方法进行初始化，之后使用这个类的对象来进行操作。”</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">Writer</span> writer <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">Writer</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 writer<span class="token punctuation">.</span><span class="token function">setName</span><span class="token punctuation">(</span><span class="token string">&quot;沉默王二&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><p>像上面这个例子，就可以理解为“正射”。而反射就意味着一开始我们不知道要初始化的类到底是什么，也就没法直接使用 <code>new</code> 关键字创建对象了。</p><p>我们只知道这个类的一些基本信息，就好像我们看电影的时候，为了抓住一个犯罪嫌疑人，警察就会问一些目击证人，根据这些证人提供的信息，找专家把犯罪嫌疑人的样貌给画出来——这个过程，就可以称之为<strong>反射</strong>。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">Class</span> clazz <span class="token operator">=</span> <span class="token class-name">Class</span><span class="token punctuation">.</span><span class="token function">forName</span><span class="token punctuation">(</span><span class="token string">&quot;com.itwanger.s39.Writer&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 <span class="token class-name">Method</span> method <span class="token operator">=</span> clazz<span class="token punctuation">.</span><span class="token function">getMethod</span><span class="token punctuation">(</span><span class="token string">&quot;setName&quot;</span><span class="token punctuation">,</span> <span class="token class-name">String</span><span class="token punctuation">.</span><span class="token keyword">class</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
@@ -155,6 +155,6 @@ java.lang.String[][]
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><p><strong>5）获取方法</strong></p><p>大体上和获取构造方法类似，把关键字 Constructor 换成 Method 即可。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">Method</span><span class="token punctuation">[</span><span class="token punctuation">]</span> methods1 <span class="token operator">=</span> <span class="token class-name">System</span><span class="token punctuation">.</span><span class="token keyword">class</span><span class="token punctuation">.</span><span class="token function">getDeclaredMethods</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 <span class="token class-name">Method</span><span class="token punctuation">[</span><span class="token punctuation">]</span> methods2 <span class="token operator">=</span> <span class="token class-name">System</span><span class="token punctuation">.</span><span class="token keyword">class</span><span class="token punctuation">.</span><span class="token function">getMethods</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><p>“注意，三妹，如果你想反射访问私有字段和（构造）方法的话，需要使用 <code>Constructor/Field/Method.setAccessible(true)</code> 来绕开 Java 语言的访问限制。”我说。</p><p>“好的，二哥。还有资料可以参考吗？”三妹问。</p><p>“有的，有两篇文章写得非常不错，你在学习反射的时候可以作为参考。”我说。</p><p>第一篇：深入理解 Java 反射和动态代理</p><blockquote><p>链接：https://dunwu.github.io/javacore/basics/java-reflection.html#_1-%E5%8F%8D%E5%B0%84%E7%AE%80%E4%BB%8B</p></blockquote><p>第二篇：大白话说Java反射：入门、使用、原理：</p><blockquote><p>链接：https://www.cnblogs.com/chanshuyi/p/head_first_of_reflection.html</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/basic-extra-meal/fanshe.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/14 上午7:14:28</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/basic-extra-meal/enum.html" class="nav-link prev" aria-label="枚举"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->枚举</div></a><!----></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->深入理解Java泛型</h1><div class="page-info"><span class="author-info" 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property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 9 分钟</span><meta property="timeRequired" content="PT9M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="深入理解java泛型" tabindex="-1"><a class="header-anchor" href="#深入理解java泛型" aria-hidden="true">#</a> 深入理解Java泛型</h1><p>“二哥，为什么要设计泛型啊？”三妹开门见山地问。</p><p>“三妹啊，听哥慢慢给你讲啊。”我说。</p><p>Java 在 1.5 时增加了泛型机制，据说专家们为此花费了 5 年左右的时间（听起来很不容易）。有了泛型之后，尤其是对集合类的使用，就变得更规范了。</p><p>看下面这段简单的代码。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">ArrayList</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">String</span><span class="token punctuation">&gt;</span></span> list <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">ArrayList</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">String</span><span class="token punctuation">&gt;</span></span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.11 并发编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section 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class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->深入理解Java泛型</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2021年10月22日</span><meta property="datePublished" content="2021-10-22T07:22:10.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><meta property="articleSection" content="Java核心"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 9 分钟</span><meta property="timeRequired" content="PT9M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="深入理解java泛型" tabindex="-1"><a class="header-anchor" href="#深入理解java泛型" aria-hidden="true">#</a> 深入理解Java泛型</h1><p>“二哥，为什么要设计泛型啊？”三妹开门见山地问。</p><p>“三妹啊，听哥慢慢给你讲啊。”我说。</p><p>Java 在 1.5 时增加了泛型机制，据说专家们为此花费了 5 年左右的时间（听起来很不容易）。有了泛型之后，尤其是对集合类的使用，就变得更规范了。</p><p>看下面这段简单的代码。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">ArrayList</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">String</span><span class="token punctuation">&gt;</span></span> list <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">ArrayList</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">String</span><span class="token punctuation">&gt;</span></span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 list<span class="token punctuation">.</span><span class="token function">add</span><span class="token punctuation">(</span><span class="token string">&quot;沉默王二&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 <span class="token class-name">String</span> str <span class="token operator">=</span> list<span class="token punctuation">.</span><span class="token function">get</span><span class="token punctuation">(</span><span class="token number">0</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>“三妹，你能想象到在没有泛型之前该怎么办吗？”</p><p>“嗯，想不到，还是二哥你说吧。”</p><p>嗯，我们可以使用 Object 数组来设计 <code>Arraylist</code> 类。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">class</span> <span class="token class-name">Arraylist</span> <span class="token punctuation">{</span>
@@ -309,6 +309,6 @@ list3<span class="token punctuation">.</span><span class="token function">add</s
 
 <span class="token comment">// Wanger w3 = list3.get(0);</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>需要注意的是，无法从 <code>Arraylist&lt;? super Wanger&gt;</code> 这样类型的 list3 中取出数据。</p><p>“三妹，关于泛型，这里还有一篇很不错的文章，你等会去看一下。”我说。</p><blockquote><p>https://www.pdai.tech/md/java/basic/java-basic-x-generic.html</p></blockquote><p>“对泛型机制讲的也很透彻，你结合二哥给你讲的这些，再深入的学习一下。”</p><p>“好的，二哥。”</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/basic-extra-meal/generic.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/14 上午7:14:28</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/basic-extra-meal/varables.html" class="nav-link prev" aria-label="可变参数"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->可变参数</div></a><a href="/basic-extra-meal/annotation.html" class="nav-link next" aria-label="注解"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">注解<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 9 分钟</span><meta property="timeRequired" content="PT9M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="深入理解java中的hashcode方法" tabindex="-1"><a class="header-anchor" href="#深入理解java中的hashcode方法" aria-hidden="true">#</a> 深入理解Java中的hashCode方法</h1><p>假期结束了，需要快速切换到工作的状态投入到新的一天当中。放假的时候痛快地玩耍，上班的时候积极的工作，这应该是我们大多数“现代人”该有的生活状态。</p><p>我之所以费尽心思铺垫了前面这段话，就是想告诉大家，技术文虽迟但到，来吧，学起来~</p><p>今天我们来谈谈 Java 中的 <code>hashCode()</code> 方法。众所周知，Java 是一门面向对象的编程语言，所有的类都会默认继承自 Object 类，而 Object 的中文意思就是“对象”。</p><p>Object 类中就包含了 <code>hashCode()</code> 方法：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token annotation punctuation">@HotSpotIntrinsicCandidate</span>
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class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->深入理解Java中的hashCode方法</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 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00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月15日</span><meta property="datePublished" content="2022-03-15T14:42:30.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><meta property="articleSection" content="Java核心"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 9 分钟</span><meta property="timeRequired" content="PT9M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="深入理解java中的hashcode方法" tabindex="-1"><a class="header-anchor" href="#深入理解java中的hashcode方法" aria-hidden="true">#</a> 深入理解Java中的hashCode方法</h1><p>假期结束了，需要快速切换到工作的状态投入到新的一天当中。放假的时候痛快地玩耍，上班的时候积极的工作，这应该是我们大多数“现代人”该有的生活状态。</p><p>我之所以费尽心思铺垫了前面这段话，就是想告诉大家，技术文虽迟但到，来吧，学起来~</p><p>今天我们来谈谈 Java 中的 <code>hashCode()</code> 方法。众所周知，Java 是一门面向对象的编程语言，所有的类都会默认继承自 Object 类，而 Object 的中文意思就是“对象”。</p><p>Object 类中就包含了 <code>hashCode()</code> 方法：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token annotation punctuation">@HotSpotIntrinsicCandidate</span>
 <span class="token keyword">public</span> <span class="token keyword">native</span> <span class="token keyword">int</span> <span class="token function">hashCode</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><p>意味着所有的类都会有一个 <code>hashCode()</code> 方法，该方法会返回一个 int 类型的值。由于 <code>hashCode()</code> 方法是一个本地方法（<code>native</code> 关键字修饰的方法，用 <code>C/C++</code> 语言实现，由 Java 调用），意味着 Object 类中并没有给出具体的实现。</p><p>具体的实现可以参考 <code>jdk/src/hotspot/share/runtime/synchronizer.cpp</code>（源码可以到 GitHub 上 OpenJDK 的仓库中下载）。<code>get_next_hash()</code> 方法会根据 hashCode 的取值来决定采用哪一种哈希值的生成策略。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/basic-extra-meal/hashcode-1.png" alt=""></p><p>并且 <code>hashCode()</code> 方法被 <code>@HotSpotIntrinsicCandidate</code> 注解修饰，说明它在 HotSpot 虚拟机中有一套高效的实现，基于 CPU 指令。</p><p>那大家有没有想过这样一个问题：为什么 Object 类需要一个 <code>hashCode()</code> 方法呢？</p><p>在 Java 中，<code>hashCode()</code> 方法的主要作用就是为了配合哈希表使用的。</p><p>哈希表（Hash Table），也叫散列表，是一种可以通过关键码值（key-value）直接访问的数据结构，它最大的特点就是可以快速实现查找、插入和删除。其中用到的算法叫做哈希，就是把任意长度的输入，变换成固定长度的输出，该输出就是哈希值。像 MD5、SHA1 都用的是哈希算法。</p><p>像 Java 中的 HashSet、Hashtable（注意是小写的 t）、HashMap 都是基于哈希表的具体实现。其中的 HashMap 就是最典型的代表，不仅面试官经常问，工作中的使用频率也非常的高。</p><p>大家想一下，如果没有哈希表，但又需要这样一个数据结构，它里面存放的数据是不允许重复的，该怎么办呢？</p><p>要不使用 <code>equals()</code> 方法进行逐个比较？这种方案当然是可行的。但如果数据量特别特别大，采用 <code>equals()</code> 方法进行逐个对比的效率肯定很低很低，最好的解决方案就是哈希表。</p><p>拿 HashMap 来说吧。当我们要在它里面添加对象时，先调用这个对象的 <code>hashCode()</code> 方法，得到对应的哈希值，然后将哈希值和对象一起放到 HashMap 中。当我们要再添加一个新的对象时：</p><ul><li>获取对象的哈希值；</li><li>和之前已经存在的哈希值进行比较，如果不相等，直接存进去；</li><li>如果有相等的，再调用 <code>equals()</code> 方法进行对象之间的比较，如果相等，不存了；</li><li>如果不等，说明哈希冲突了，增加一个链表，存放新的对象；</li><li>如果链表的长度大于 8，转为红黑树来处理。</li></ul><p>就这么一套下来，调用 <code>equals()</code> 方法的频率就大大降低了。也就是说，只要哈希算法足够的高效，把发生哈希冲突的频率降到最低，哈希表的效率就特别的高。</p><p>来看一下 HashMap 的哈希算法：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">static</span> <span class="token keyword">final</span> <span class="token keyword">int</span> <span class="token function">hash</span><span class="token punctuation">(</span><span class="token class-name">Object</span> key<span class="token punctuation">)</span> <span class="token punctuation">{</span>
     <span class="token keyword">int</span> h<span class="token punctuation">;</span>
@@ -144,6 +144,6 @@
   <span class="token keyword">return</span> value<span class="token punctuation">;</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>如果没有 C++ 基础的话，不用细致去看每一行代码，我们只通过表面去了解一下 <code>get_next_hash()</code> 这个方法就行。其中的 <code>hashCode</code> 变量是 JVM 启动时的一个全局参数，可以通过它来切换哈希值的生成策略。</p><ul><li><code>hashCode==0</code>，调用操作系统 OS 的 <code>random()</code> 方法返回随机数。</li><li><code>hashCode == 1</code>，在 STW（stop-the-world）操作中，这种策略通常用于同步方案中。利用对象地址进行计算，使用不经常更新的随机数（<code>GVars.stw_random</code>）参与其中。</li><li><code>hashCode == 2</code>，使用返回 1，用于某些情况下的测试。</li><li><code>hashCode == 3</code>，从 0 开始计算哈希值，不是线程安全的，多个线程可能会得到相同的哈希值。</li><li><code>hashCode == 4</code>，与创建对象的内存位置有关，原样输出。</li><li><code>hashCode == 5</code>，默认值，支持多线程，使用了 Marsaglia 的 xor-shift 算法产生伪随机数。所谓的 xor-shift 算法，简单来说，看起来就是一个移位寄存器，每次移入的位由寄存器中若干位取异或生成。所谓的伪随机数，不是完全随机的，但是真随机生成比较困难，所以只要能通过一定的随机数统计检测，就可以当作真随机数来使用。</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/basic-extra-meal/hashcode.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 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Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.11 并发编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->深入理解Java中的不可变对象</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg 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18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><meta property="articleSection" content="Java核心"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 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213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 6 分钟</span><meta property="timeRequired" content="PT6M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/basic-extra-meal/immutable.html#_01、什么是不可变类" class="router-link-active router-link-exact-active toc-link level3">01、什么是不可变类</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-extra-meal/immutable.html#_02、常见的不可变类" class="router-link-active router-link-exact-active toc-link level3">02、常见的不可变类</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-extra-meal/immutable.html#_03、手撸不可变类" class="router-link-active router-link-exact-active toc-link level3">03、手撸不可变类</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-extra-meal/immutable.html#_04、总结" class="router-link-active router-link-exact-active toc-link level3">04、总结</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="深入理解java中的不可变对象" tabindex="-1"><a class="header-anchor" href="#深入理解java中的不可变对象" aria-hidden="true">#</a> 深入理解Java中的不可变对象</h1><blockquote><p>二哥，你能给我说说为什么 String 是 immutable 类（不可变对象）吗？我想研究它，想知道为什么它就不可变了，这种强烈的愿望就像想研究浩瀚的星空一样。但无奈自身功力有限，始终觉得雾里看花终隔一层。二哥你的文章总是充满趣味性，我想一定能够说明白，我也一定能够看明白，能在接下来写一写吗？</p></blockquote><p>收到读者小 R 的私信后，我就总感觉自己有一种义不容辞的责任，非要把 immutable 类说明白不可！</p><h3 id="_01、什么是不可变类" tabindex="-1"><a class="header-anchor" href="#_01、什么是不可变类" aria-hidden="true">#</a> 01、什么是不可变类</h3><p>一个类的对象在通过构造方法创建后如果状态不会再被改变，那么它就是一个不可变（immutable）类。它的所有成员变量的赋值仅在构造方法中完成，不会提供任何 setter 方法供外部类去修改。</p><p>还记得《神雕侠侣》中小龙女的古墓吗？随着那一声巨响，仅有的通道就被无情地关闭了。别较真那个密道，我这么说只是为了打开你的想象力，让你对不可变类有一个更直观的印象。</p><p>自从有了多线程，生产力就被无限地放大了，所有的程序员都爱它，因为强大的硬件能力被充分地利用了。但与此同时，所有的程序员都对它心生忌惮，因为一不小心，多线程就会把对象的状态变得混乱不堪。</p><p>为了保护状态的原子性、可见性、有序性，我们程序员可以说是竭尽所能。其中，synchronized（同步）关键字是最简单最入门的一种解决方案。</p><p>假如说类是不可变的，那么对象的状态就也是不可变的。这样的话，每次修改对象的状态，就会产生一个新的对象供不同的线程使用，我们程序员就不必再担心并发问题了。</p><h3 id="_02、常见的不可变类" tabindex="-1"><a class="header-anchor" href="#_02、常见的不可变类" aria-hidden="true">#</a> 02、常见的不可变类</h3><p>提到不可变类，几乎所有的程序员第一个想到的，就是 String 类。那为什么 String 类要被设计成不可变的呢？</p><p>1）常量池的需要</p><p>字符串常量池是 Java 堆内存中一个特殊的存储区域，当创建一个 String 对象时，假如此字符串在常量池中不存在，那么就创建一个；假如已经存，就不会再创建了，而是直接引用已经存在的对象。这样做能够减少 JVM 的内存开销，提高效率。</p><p>2）hashCode 的需要</p><p>因为字符串是不可变的，所以在它创建的时候，其 hashCode 就被缓存了，因此非常适合作为哈希值（比如说作为 HashMap 的键），多次调用只返回同一个值，来提高效率。</p><p>3）线程安全</p><p>就像之前说的那样，如果对象的状态是可变的，那么在多线程环境下，就很容易造成不可预期的结果。而 String 是不可变的，就可以在多个线程之间共享，不需要同步处理。</p><p>因此，当我们调用 String 类的任何方法（比如说 <code>trim()</code>、<code>substring()</code>、<code>toLowerCase()</code>）时，总会返回一个新的对象，而不影响之前的值。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">String</span> cmower <span class="token operator">=</span> <span class="token string">&quot;沉默王二，一枚有趣的程序员&quot;</span><span class="token punctuation">;</span>
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router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="不可变对象"><!---->不可变对象<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/basic-extra-meal/immutable.html#_01、什么是不可变类" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="01、什么是不可变类"><!---->01、什么是不可变类<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/basic-extra-meal/immutable.html#_02、常见的不可变类" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="02、常见的不可变类"><!---->02、常见的不可变类<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/basic-extra-meal/immutable.html#_03、手撸不可变类" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="03、手撸不可变类"><!---->03、手撸不可变类<!----></a><ul class="sidebar-sub-headers"></ul></li><li 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class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-extra-meal/fanshe.html" class="nav-link sidebar-link sidebar-page" aria-label="反射"><!---->反射<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.4 字符串&amp;数组</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.5 集合框架（容器）</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.6 IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.11 并发编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->深入理解Java中的不可变对象</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2021年11月8日</span><meta property="datePublished" content="2021-11-08T13:04:25.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 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class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/basic-extra-meal/immutable.html#_01、什么是不可变类" class="router-link-active router-link-exact-active toc-link level3">01、什么是不可变类</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-extra-meal/immutable.html#_02、常见的不可变类" class="router-link-active router-link-exact-active toc-link level3">02、常见的不可变类</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-extra-meal/immutable.html#_03、手撸不可变类" class="router-link-active router-link-exact-active toc-link level3">03、手撸不可变类</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-extra-meal/immutable.html#_04、总结" class="router-link-active router-link-exact-active toc-link level3">04、总结</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="深入理解java中的不可变对象" tabindex="-1"><a class="header-anchor" href="#深入理解java中的不可变对象" aria-hidden="true">#</a> 深入理解Java中的不可变对象</h1><blockquote><p>二哥，你能给我说说为什么 String 是 immutable 类（不可变对象）吗？我想研究它，想知道为什么它就不可变了，这种强烈的愿望就像想研究浩瀚的星空一样。但无奈自身功力有限，始终觉得雾里看花终隔一层。二哥你的文章总是充满趣味性，我想一定能够说明白，我也一定能够看明白，能在接下来写一写吗？</p></blockquote><p>收到读者小 R 的私信后，我就总感觉自己有一种义不容辞的责任，非要把 immutable 类说明白不可！</p><h3 id="_01、什么是不可变类" tabindex="-1"><a class="header-anchor" href="#_01、什么是不可变类" aria-hidden="true">#</a> 01、什么是不可变类</h3><p>一个类的对象在通过构造方法创建后如果状态不会再被改变，那么它就是一个不可变（immutable）类。它的所有成员变量的赋值仅在构造方法中完成，不会提供任何 setter 方法供外部类去修改。</p><p>还记得《神雕侠侣》中小龙女的古墓吗？随着那一声巨响，仅有的通道就被无情地关闭了。别较真那个密道，我这么说只是为了打开你的想象力，让你对不可变类有一个更直观的印象。</p><p>自从有了多线程，生产力就被无限地放大了，所有的程序员都爱它，因为强大的硬件能力被充分地利用了。但与此同时，所有的程序员都对它心生忌惮，因为一不小心，多线程就会把对象的状态变得混乱不堪。</p><p>为了保护状态的原子性、可见性、有序性，我们程序员可以说是竭尽所能。其中，synchronized（同步）关键字是最简单最入门的一种解决方案。</p><p>假如说类是不可变的，那么对象的状态就也是不可变的。这样的话，每次修改对象的状态，就会产生一个新的对象供不同的线程使用，我们程序员就不必再担心并发问题了。</p><h3 id="_02、常见的不可变类" tabindex="-1"><a class="header-anchor" href="#_02、常见的不可变类" aria-hidden="true">#</a> 02、常见的不可变类</h3><p>提到不可变类，几乎所有的程序员第一个想到的，就是 String 类。那为什么 String 类要被设计成不可变的呢？</p><p>1）常量池的需要</p><p>字符串常量池是 Java 堆内存中一个特殊的存储区域，当创建一个 String 对象时，假如此字符串在常量池中不存在，那么就创建一个；假如已经存，就不会再创建了，而是直接引用已经存在的对象。这样做能够减少 JVM 的内存开销，提高效率。</p><p>2）hashCode 的需要</p><p>因为字符串是不可变的，所以在它创建的时候，其 hashCode 就被缓存了，因此非常适合作为哈希值（比如说作为 HashMap 的键），多次调用只返回同一个值，来提高效率。</p><p>3）线程安全</p><p>就像之前说的那样，如果对象的状态是可变的，那么在多线程环境下，就很容易造成不可预期的结果。而 String 是不可变的，就可以在多个线程之间共享，不需要同步处理。</p><p>因此，当我们调用 String 类的任何方法（比如说 <code>trim()</code>、<code>substring()</code>、<code>toLowerCase()</code>）时，总会返回一个新的对象，而不影响之前的值。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">String</span> cmower <span class="token operator">=</span> <span class="token string">&quot;沉默王二，一枚有趣的程序员&quot;</span><span class="token punctuation">;</span>
 cmower<span class="token punctuation">.</span><span class="token function">substring</span><span class="token punctuation">(</span><span class="token number">0</span><span class="token punctuation">,</span><span class="token number">4</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span>cmower<span class="token punctuation">)</span><span class="token punctuation">;</span><span class="token comment">// 沉默王二，一枚有趣的程序员</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>虽然调用 <code>substring()</code> 方法对 cmower 进行了截取，但 cmower 的值没有改变。</p><p>除了 String 类，包装器类 Integer、Long 等也是不可变类。</p><h3 id="_03、手撸不可变类" tabindex="-1"><a class="header-anchor" href="#_03、手撸不可变类" aria-hidden="true">#</a> 03、手撸不可变类</h3><p>看懂一个不可变类也许容易，但要创建一个自定义的不可变类恐怕就有点难了。但知难而进是我们作为一名优秀的程序员不可或缺的品质，正因为不容易，我们才能真正地掌握它。</p><p>接下来，就请和我一起，来自定义一个不可变类吧。一个不可变类，必须要满足以下 4 个条件：</p><p>1）确保类是 final 的，不允许被其他类继承。</p><p>2）确保所有的成员变量（字段）是 final 的，这样的话，它们就只能在构造方法中初始化值，并且不会在随后被修改。</p><p>3）不要提供任何 setter 方法。</p><p>4）如果要修改类的状态，必须返回一个新的对象。</p><p>按照以上条件，我们来自定义一个简单的不可变类 Writer。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">final</span> <span class="token keyword">class</span> <span class="token class-name">Writer</span> <span class="token punctuation">{</span>
@@ -136,6 +136,6 @@ cmower<span class="token punctuation">.</span><span class="token function">subst
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>这样的话，构造方法初始化后的 Book 对象就不会再被修改了。此时，运行 WriterDemo，就会发现价格不再发生变化了。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>定价：Book{name=&#39;Web全栈开发进阶之路&#39;, price=79}
 促销价：Book{name=&#39;Web全栈开发进阶之路&#39;, price=79}
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="_04、总结" tabindex="-1"><a class="header-anchor" href="#_04、总结" aria-hidden="true">#</a> 04、总结</h3><p>不可变类有很多优点，就像之前提到的 String 类那样，尤其是在多线程环境下，它非常的安全。尽管每次修改都会创建一个新的对象，增加了内存的消耗，但这个缺点相比它带来的优点，显然是微不足道的——无非就是捡了西瓜，丢了芝麻。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/basic-extra-meal/immutable.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/6/6 下午11:31:27</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/oo/instanceof.html" class="nav-link prev" aria-label="instanceof"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->instanceof</div></a><a href="/basic-extra-meal/varables.html" class="nav-link next" aria-label="可变参数"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">可变参数<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->instanceof关键字是如何实现的？</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg 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大的一篇回答甩给了他，并且叮嘱他：“认认真真看，玩完后要是还不明白，再来问我。。。”</p><blockquote><p>作者：RednaxelaFX，整理：沉默王二，链接：https://www.zhihu.com/question/21574535/answer/18998914</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/basic-extra-meal/instanceof-jvm-b676fee6-bfd4-4ae9-9c7b-e488e345f775.gif" alt=""></p><hr><h3 id="场景一-月薪-3000-元一下的码农职位" tabindex="-1"><a class="header-anchor" href="#场景一-月薪-3000-元一下的码农职位" aria-hidden="true">#</a> 场景一：月薪 3000 元一下的码农职位</h3><p>用 Java 伪代码来表现instanceof关键字在Java语言规范所描述的运行时语义，是这样的：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token comment">// obj instanceof T</span>
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class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->instanceof关键字是如何实现的？</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 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level3">场景三：月薪10000的Java高级研发职位</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-extra-meal/instanceof-jvm.html#场景四-月薪10000以上的java资深研发职位" class="router-link-active router-link-exact-active toc-link level3">场景四：月薪10000以上的Java资深研发职位</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="instanceof关键字是如何实现的" tabindex="-1"><a class="header-anchor" href="#instanceof关键字是如何实现的" aria-hidden="true">#</a> instanceof关键字是如何实现的？</h1><p>小二那天去面试，碰到了这个问题：“<strong>instanceof 关键字是如何实现的</strong>？”面试官希望他能从底层来分析一下，结果小二没答上来，就来问我。</p><p>我唯唯诺诺，强装镇定，只好把 R 大的一篇回答甩给了他，并且叮嘱他：“认认真真看，玩完后要是还不明白，再来问我。。。”</p><blockquote><p>作者：RednaxelaFX，整理：沉默王二，链接：https://www.zhihu.com/question/21574535/answer/18998914</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/basic-extra-meal/instanceof-jvm-b676fee6-bfd4-4ae9-9c7b-e488e345f775.gif" alt=""></p><hr><h3 id="场景一-月薪-3000-元一下的码农职位" tabindex="-1"><a class="header-anchor" href="#场景一-月薪-3000-元一下的码农职位" aria-hidden="true">#</a> 场景一：月薪 3000 元一下的码农职位</h3><p>用 Java 伪代码来表现instanceof关键字在Java语言规范所描述的运行时语义，是这样的：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token comment">// obj instanceof T</span>
 <span class="token keyword">boolean</span> result<span class="token punctuation">;</span>
 <span class="token keyword">if</span> <span class="token punctuation">(</span>obj <span class="token operator">==</span> <span class="token keyword">null</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
   result <span class="token operator">=</span> <span class="token boolean">false</span><span class="token punctuation">;</span>
@@ -66,6 +66,6 @@
   <span class="token keyword">return</span> <span class="token boolean">false</span><span class="token punctuation">;</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>HotSpot VM的两个编译器，Client Compiler (C1) 与 Server Compiler (C2) 各自对子类型判断的实现有更进一步的优化。实际上在JVM里，instanceof的功能就实现了4份，VM runtime、解释器、C1、C2各一份。</p><p>VM runtime的：</p><blockquote><p>http://hg.openjdk.java.net/jdk7u/jdk7u/hotspot/file/tip/src/share/vm/oops/oop.inline.hpp</p></blockquote><p>分享的最后，二哥简单来说一下。</p><p>这个问题涉及语法细节，涉及jvm实现，涉及编译器，还涉及一点点数据结构设计，比较考验一个 Java 程序员的内功，如果要回答到论文的程度，那真的是，面试官也得提前备好知识点，不然应聘者的回答啥也听不懂就挺尴尬的。</p><p>反正 R 大回答里的很多细节我都是第一次听，逃了逃了。。。。。。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/basic-extra-meal/instanceof-jvm.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/12 下午4:24:21</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/basic-extra-meal/class-object.html" class="nav-link prev" aria-label="先有Class还是先有Object"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->先有Class还是先有Object</div></a><!----></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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punctuation">(</span><span class="token number">18</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java中int、Integer、new Integer之间的区别</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2021年10月22日</span><meta property="datePublished" content="2021-10-22T07:22:10.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><meta property="articleSection" content="Java核心"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 4 分钟</span><meta property="timeRequired" content="PT4M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="java中int、integer、new-integer之间的区别" tabindex="-1"><a class="header-anchor" href="#java中int、integer、new-integer之间的区别" aria-hidden="true">#</a> Java中int、Integer、new Integer之间的区别</h1><p>“三妹，今天我们来补一个小的知识点：Java 数据类型缓存池。”我喝了一口枸杞泡的茶后对三妹说，“考你一个问题哈：<code>new Integer(18) 与 Integer.valueOf(18) </code> 的区别是什么？”</p><p>“难道不一样吗？”三妹有点诧异。</p><p>“不一样的。”我笑着说。</p><ul><li><code>new Integer(18)</code> 每次都会新建一个对象;</li><li><code>Integer.valueOf(18)</code> 会使⽤用缓存池中的对象，多次调用只会取同⼀一个对象的引用。</li></ul><p>来看下面这段代码：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">Integer</span> x <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">Integer</span><span class="token punctuation">(</span><span class="token number">18</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 <span class="token class-name">Integer</span> y <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">Integer</span><span class="token punctuation">(</span><span class="token number">18</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span>x <span class="token operator">==</span> y<span class="token punctuation">)</span><span class="token punctuation">;</span>
 
@@ -105,6 +105,6 @@ false
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>“呀，报错了呀。”三妹喊道。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>Exception in thread &quot;main&quot; java.lang.AssertionError
         at com.itwanger.s51.AssertTest.main(AssertTest.java:9)
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><p>“是滴，因为 126 小于 127。”我回答道。</p><p>“原来 assert 是这样用的啊，我明白了。”三妹表示学会了。</p><p>“那，缓存池之所以存在的原因也是因为这样做可以提高程序的整体性能，因为相对来说，比如说 Integer，-128~127 这个范围内的 256 个数字使用的频率会高一点。”我总结道。</p><p>“get 了！二哥你真棒，又学到了。”三妹很开心~</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/basic-extra-meal/int-cache.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/14 上午7:14:28</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: 71440988+leo220yuyaodog@users.noreply.github.com">leoshine</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/basic-extra-meal/java-unicode.html" class="nav-link prev" aria-label="Unicode和UTF-8编码"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->Unicode和UTF-8编码</div></a><a href="/basic-extra-meal/box.html" class="nav-link next" aria-label="拆箱和装箱"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">拆箱和装箱<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
-    <script type="module" src="/assets/app.a0271b9c.js" defer></script>
+    <script type="module" src="/assets/app.615e41d8.js" defer></script>
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diff --git a/dist/basic-extra-meal/java-naming.html b/dist/basic-extra-meal/java-naming.html
index e04365df..5fa8fc2a 100644
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clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java命名规范（非常全面，可以收藏）</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path 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33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2021年10月22日</span><meta property="datePublished" content="2021-10-22T07:22:10.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 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class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/basic-extra-meal/java-naming.html#_01、包-package" class="router-link-active router-link-exact-active toc-link level3">01、包（package）</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-extra-meal/java-naming.html#_02、类-class" class="router-link-active router-link-exact-active toc-link level3">02、类（class）</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-extra-meal/java-naming.html#_03、接口-interface" class="router-link-active router-link-exact-active toc-link level3">03、接口（interface）</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-extra-meal/java-naming.html#_04、字段-field-和变量-variable" class="router-link-active router-link-exact-active toc-link level3">04、字段（field）和变量（variable）</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-extra-meal/java-naming.html#_05、常量-constant" class="router-link-active router-link-exact-active toc-link level3">05、常量（constant）</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-extra-meal/java-naming.html#_06、方法-method" class="router-link-active router-link-exact-active toc-link level3">06、方法（method）</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-extra-meal/java-naming.html#_07、总结" class="router-link-active router-link-exact-active toc-link level3">07、总结</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="java命名规范-非常全面-可以收藏" tabindex="-1"><a class="header-anchor" href="#java命名规范-非常全面-可以收藏" aria-hidden="true">#</a> Java命名规范（非常全面，可以收藏）</h1><p>“二哥，Java 中的命名约定都有哪些呢？”三妹的脸上泛着甜甜的笑容，她开始对接下来要学习的内容充满期待了，这正是我感到欣慰的地方。</p><p>“对于我们中国人来说，名字也是有讲究的，比如说我叫沉默王二，你就叫沉默王三，哈哈。”我笑着对三妹说。</p><p>命名约定决定我们使用什么样的标识符来命名包、类、字段、方法等等，虽然这个规则不是强制的，可以遵守，也可以不遵守，但如果不遵守的话，就会带来很多不必要的麻烦。</p><p>起个好的名字，就好像穿一件得体的衣服，呈现给人的用户体验是完全不一样的。</p><p>好的命名可以让你的代码更易读，包括你自己和你的小伙伴，看一眼，不用想太多，就能明白代码是干嘛的。</p><p>拿我这个笔名“沉默王二”来举例吧，读起来我就觉得朗朗上口，读者看到这个笔名就知道我是一个什么样的人——对不熟的人保持沉默，对熟的人妙语连珠，哈哈。</p><h3 id="_01、包-package" tabindex="-1"><a class="header-anchor" href="#_01、包-package" aria-hidden="true">#</a> 01、包（package）</h3><p>包的命名应该遵守以下规则：</p><ul><li><p>应该全部是小写字母</p></li><li><p>点分隔符之间有且仅有一个自然语义的英语单词</p></li><li><p>包名统一使用单数形式，比如说 <code>com.itwanger.util</code> 不能是 <code>com.itwanger.utils</code></p></li><li><p>在最新的 Java 编程规范中，要求开发人员在自己定义的包名前加上唯一的前缀。由于互联网上的域名是不会重复的，所以多数开发人员采用自己公司（或者个人博客）在互联网上的域名称作为包的唯一前缀。比如我文章中出现的代码示例的包名就是 <code>package com.itwanger</code>。</p></li></ul><h3 id="_02、类-class" tabindex="-1"><a class="header-anchor" href="#_02、类-class" aria-hidden="true">#</a> 02、类（class）</h3><p>类的命名应该遵守以下规则：</p><ul><li><p>必须以大写字母开头</p></li><li><p>最好是一个名词，比如说 System</p></li><li><p>类名使用 UpperCamelCase（驼峰式命名）风格</p></li><li><p>尽量不要省略成单词的首字母，但以下情形例外：DO/BO/DTO/VO/AO/ PO / UID 等</p></li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/core-grammar/fifteen-01.png" alt=""></p><p>另外，如果是抽象类的话，使用 Abstract 或 Base 开头；如果是异常类的话，使用 Exception 结尾；如果是测试类的话，使用 Test 结尾。</p><h3 id="_03、接口-interface" tabindex="-1"><a class="header-anchor" href="#_03、接口-interface" aria-hidden="true">#</a> 03、接口（interface）</h3><p>接口的命名应该遵守以下规则：</p><ul><li><p>必须以大写字母开头</p></li><li><p>最好是一个形容词，比如说 Runnable</p></li><li><p>尽量不要省略成单词的首字母</p></li></ul><p>来看个例子：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">interface</span> <span class="token class-name">Printable</span> <span class="token punctuation">{</span><span class="token punctuation">}</span>
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class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/basic-extra-meal/java-naming.html#_06、方法-method" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="06、方法（method）"><!---->06、方法（method）<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/basic-extra-meal/java-naming.html#_07、总结" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="07、总结"><!---->07、总结<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.3 面向对象编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.4 字符串&amp;数组</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.5 集合框架（容器）</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.6 IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.11 并发编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java命名规范（非常全面，可以收藏）</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2021年10月22日</span><meta property="datePublished" content="2021-10-22T07:22:10.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><meta property="articleSection" content="Java核心"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 6 分钟</span><meta property="timeRequired" content="PT6M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/basic-extra-meal/java-naming.html#_01、包-package" class="router-link-active router-link-exact-active toc-link level3">01、包（package）</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-extra-meal/java-naming.html#_02、类-class" class="router-link-active router-link-exact-active toc-link level3">02、类（class）</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-extra-meal/java-naming.html#_03、接口-interface" class="router-link-active router-link-exact-active toc-link level3">03、接口（interface）</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-extra-meal/java-naming.html#_04、字段-field-和变量-variable" class="router-link-active router-link-exact-active toc-link level3">04、字段（field）和变量（variable）</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-extra-meal/java-naming.html#_05、常量-constant" class="router-link-active router-link-exact-active toc-link level3">05、常量（constant）</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-extra-meal/java-naming.html#_06、方法-method" class="router-link-active router-link-exact-active toc-link level3">06、方法（method）</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-extra-meal/java-naming.html#_07、总结" class="router-link-active router-link-exact-active toc-link level3">07、总结</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="java命名规范-非常全面-可以收藏" tabindex="-1"><a class="header-anchor" href="#java命名规范-非常全面-可以收藏" aria-hidden="true">#</a> Java命名规范（非常全面，可以收藏）</h1><p>“二哥，Java 中的命名约定都有哪些呢？”三妹的脸上泛着甜甜的笑容，她开始对接下来要学习的内容充满期待了，这正是我感到欣慰的地方。</p><p>“对于我们中国人来说，名字也是有讲究的，比如说我叫沉默王二，你就叫沉默王三，哈哈。”我笑着对三妹说。</p><p>命名约定决定我们使用什么样的标识符来命名包、类、字段、方法等等，虽然这个规则不是强制的，可以遵守，也可以不遵守，但如果不遵守的话，就会带来很多不必要的麻烦。</p><p>起个好的名字，就好像穿一件得体的衣服，呈现给人的用户体验是完全不一样的。</p><p>好的命名可以让你的代码更易读，包括你自己和你的小伙伴，看一眼，不用想太多，就能明白代码是干嘛的。</p><p>拿我这个笔名“沉默王二”来举例吧，读起来我就觉得朗朗上口，读者看到这个笔名就知道我是一个什么样的人——对不熟的人保持沉默，对熟的人妙语连珠，哈哈。</p><h3 id="_01、包-package" tabindex="-1"><a class="header-anchor" href="#_01、包-package" aria-hidden="true">#</a> 01、包（package）</h3><p>包的命名应该遵守以下规则：</p><ul><li><p>应该全部是小写字母</p></li><li><p>点分隔符之间有且仅有一个自然语义的英语单词</p></li><li><p>包名统一使用单数形式，比如说 <code>com.itwanger.util</code> 不能是 <code>com.itwanger.utils</code></p></li><li><p>在最新的 Java 编程规范中，要求开发人员在自己定义的包名前加上唯一的前缀。由于互联网上的域名是不会重复的，所以多数开发人员采用自己公司（或者个人博客）在互联网上的域名称作为包的唯一前缀。比如我文章中出现的代码示例的包名就是 <code>package com.itwanger</code>。</p></li></ul><h3 id="_02、类-class" tabindex="-1"><a class="header-anchor" href="#_02、类-class" aria-hidden="true">#</a> 02、类（class）</h3><p>类的命名应该遵守以下规则：</p><ul><li><p>必须以大写字母开头</p></li><li><p>最好是一个名词，比如说 System</p></li><li><p>类名使用 UpperCamelCase（驼峰式命名）风格</p></li><li><p>尽量不要省略成单词的首字母，但以下情形例外：DO/BO/DTO/VO/AO/ PO / UID 等</p></li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/core-grammar/fifteen-01.png" alt=""></p><p>另外，如果是抽象类的话，使用 Abstract 或 Base 开头；如果是异常类的话，使用 Exception 结尾；如果是测试类的话，使用 Test 结尾。</p><h3 id="_03、接口-interface" tabindex="-1"><a class="header-anchor" href="#_03、接口-interface" aria-hidden="true">#</a> 03、接口（interface）</h3><p>接口的命名应该遵守以下规则：</p><ul><li><p>必须以大写字母开头</p></li><li><p>最好是一个形容词，比如说 Runnable</p></li><li><p>尽量不要省略成单词的首字母</p></li></ul><p>来看个例子：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">interface</span> <span class="token class-name">Printable</span> <span class="token punctuation">{</span><span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>接口和实现类之间也有一些规则：</p><ul><li><p>实现类用 Impl 的后缀与接口区别，比如说 CacheServiceImpl 实现 CacheService 接口</p></li><li><p>或者，AbstractTranslator 实现 Translatable 接口</p></li></ul><h3 id="_04、字段-field-和变量-variable" tabindex="-1"><a class="header-anchor" href="#_04、字段-field-和变量-variable" aria-hidden="true">#</a> 04、字段（field）和变量（variable）</h3><p>字段和变量的命名应该遵守以下规则：</p><ul><li><p>必须以小写字母开头</p></li><li><p>可以包含多个单词，第一个单词的首字母小写，其他的单词首字母大写，比如说 <code>firstName</code></p></li><li><p>最好不要使用单个字符，比如说 <code>int a</code>，除非是局部变量</p></li><li><p>类型与中括号紧挨相连来表示数组，比如说 <code>int[] arrayDemo</code>，main 方法中字符串数组参数不应该写成 <code>String args[]</code></p></li><li><p>POJO 类中的任何布尔类型的变量，都不要加 is 前缀，否则部分框架解析会引起序列化错误，我自己知道的有 fastjson</p></li><li><p>避免在子类和父类的成员变量之间、或者不同代码块的局部变量之间采用完全相同的命名，使可理解性降低。子类、父类成员变量名相同，即使是 public 类型的变量也能够通过编译，另外，局部变量在同一方法内的不同代码块中同名也是合法的，这些情况都要避免。</p></li></ul><p>反例：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">ConfusingName</span> <span class="token punctuation">{</span>
     <span class="token keyword">public</span> <span class="token keyword">int</span> stock<span class="token punctuation">;</span>
 
@@ -65,6 +65,6 @@
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="_05、常量-constant" tabindex="-1"><a class="header-anchor" href="#_05、常量-constant" aria-hidden="true">#</a> 05、常量（constant）</h3><p>常量的命名应该遵守以下规则：</p><ul><li><p>应该全部是大写字母</p></li><li><p>可以包含多个单词，单词之间使用“_”连接，比如说 <code>MAX_PRIORITY</code>，力求语义表达完整清楚，不要嫌名字长</p></li><li><p>可以包含数字，但不能以数字开头</p></li></ul><p>来看个例子：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">static</span> <span class="token keyword">final</span> <span class="token keyword">int</span> MIN_AGE <span class="token operator">=</span> <span class="token number">18</span><span class="token punctuation">;</span>  
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h3 id="_06、方法-method" tabindex="-1"><a class="header-anchor" href="#_06、方法-method" aria-hidden="true">#</a> 06、方法（method）</h3><p>方法的命名应该遵守以下规则：</p><ul><li><p>必须以小写字母开头</p></li><li><p>最好是一个动词，比如说 <code>print()</code></p></li><li><p>可以包含多个单词，第一个单词的首字母小写，其他的单词首字母大写，比如说 <code>actionPerformed()</code></p></li></ul><p>来看个例子：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">void</span> <span class="token function">writeBook</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">{</span><span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>Service/DAO 层的方法命名规约：</p><ul><li><p>获取单个对象的方法用 get 做前缀</p></li><li><p>获取多个对象的方法用 list 做前缀，复数结尾，如：listObjects</p></li><li><p>获取统计值的方法用 count 做前缀</p></li><li><p>插入的方法用 save/insert 做前缀</p></li><li><p>删除的方法用 remove/delete 做前缀</p></li><li><p>修改的方法用 update 做前缀</p></li></ul><h3 id="_07、总结" tabindex="-1"><a class="header-anchor" href="#_07、总结" aria-hidden="true">#</a> 07、总结</h3><p>除了以上这些规则以外，还有一些共同的规则需要遵守，比如说：</p><ul><li>代码中的命名均不能以下划线或美元符号开始，也不能以下划线或美元符号结束。反例：<code>_name / __name / $name / name_ / name$ / name__</code></li><li>所有编程相关的命名严禁使用拼音与英文混合的方式，更不允许直接使用中文的方式。反例：<code>DaZhePromotion [打折] / getPingfenByName() [评分] / String fw[福娃] / int 某变量 = 3</code></li><li>代码和注释中都要避免使用任何语言的种族歧视性词语。反例：<code>RIBENGUIZI / Asan / blackList / whiteList / slave</code></li><li>方法名、参数名、成员变量、局部变量都统一使用 lowerCamelCase 风格。</li><li>杜绝完全不规范的缩写，避免望文不知义。反例：AbstractClass “缩写”成 AbsClass；condition “缩写”成 condi；Function 缩写”成 Fu，此类随意缩写严重降低了代码的可阅读性。</li><li>为了达到代码自解释的目标，任何自定义编程元素在命名时，使用尽量完整的单词组合来表达。</li><li>在常量与变量的命名时，表示类型的名词放在词尾，以提升辨识度。正例：<code>startTime / workQueue / nameList / TERMINATED_THREAD_COUNT</code></li><li>如果模块、接口、类、方法使用了设计模式，在命名时需体现出具体模式。 将设计模式体现在名字中，有利于阅读者快速理解架构设计理念。比如说：<code>public class OrderFactory;public class LoginProxy;public class ResourceObserver;</code></li><li>枚举类名带上 Enum 后缀，枚举成员名称需要全大写，单词间用下划线隔开。枚举其实就是特殊的常量类，且构造方法被默认强制是私有。比如说：<code>枚举名字为 ProcessStatusEnum 的成员名称：SUCCESS / UNKNOWN_REASON</code>。</li></ul><hr><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/basic-extra-meal/java-naming.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/14 上午7:14:28</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/basic-extra-meal/48-keywords.html" class="nav-link prev" aria-label="关键字"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->关键字</div></a><!----></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->彻底弄懂Java中的Unicode和UTF-8编码</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 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15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 9 分钟</span><meta property="timeRequired" content="PT9M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="彻底弄懂java中的unicode和utf-8编码" tabindex="-1"><a class="header-anchor" href="#彻底弄懂java中的unicode和utf-8编码" aria-hidden="true">#</a> 彻底弄懂Java中的Unicode和UTF-8编码</h1><p>“二哥，<a href="https://mp.weixin.qq.com/s/twim3w_dp5ctCigjLGIbFw" target="_blank" rel="noopener noreferrer">上一篇<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>文章中提到了 Unicode，说 Java 中的 char 类型之所以占 2 个字节，是因为 Java 使用的是 Unicode 字符集而不是 ASCII 字符集，我有点迷，想了解一下，能细致给我说说吗？”</p><p>“当然没问题啊，三妹。”</p><p><strong>1）ASCII</strong></p><p>对于计算机来说，只认 0 和 1，所有的信息最终都是一个二进制数。一个二进制数要么是 0，要么是 1，所以 8 个二进制数放在一起（一个字节），就会组合出 256 种状态，也就是 2 的 8 次方（<code>2^8</code>），从 00000000 到 11111111。</p><p>ASCII 码由电报码发展而来，第一版标准发布于 1963 年，最后一次更新则是在1986 年，至今为止共定义了 128 个字符。其中 33 个字符无法显示在一般的设备上，需要用特殊的设备才能显示。</p><p>ASCII 码的局限在于只能显示 26 个基本拉丁字母、阿拉伯数字和英式标点符号，因此只能用于显示现代美国英语，对于其他一些语言则无能无力，比如在法语中，字母上方有注音符号，它就无法用 ASCII 码表示。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/core-points/ten-01.png" alt=""></p><p>PS：拉丁字母（也称为罗马字母）是多数欧洲语言采用的字母系统，是世界上最通行的字母文字系统，是罗马文明的成果之一。</p><p>虽然名称上叫作拉丁字母，但拉丁文中并没有用 J、U 和 W 这三个字母。</p><p>在我们的印象中，可能说拉丁字母多少有些陌生，说英语字母可能就有直观的印象了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/core-points/ten-02.png" alt=""></p><p>PPS：阿拉伯数字，我们都很熟悉了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/core-points/ten-03.png" alt=""></p><p>但是，阿拉伯数字并非起源于阿拉伯，而是起源于古印度。学过历史的我们应该有一些印象，阿拉伯分布于西亚和北非，以阿拉伯语为主要语言，以伊斯兰教为主要信仰。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/core-points/ten-04.png" alt=""></p><p>处在这样的地理位置，做起东亚和欧洲的一些生意就很有优势，于是阿拉伯数字就由阿拉伯人传到了欧洲，因此得名。</p><p>PPPS：英式标点符号，也叫英文标点符号，和中文标点符号很相近。标点符号是辅助文字记录语言的符号，是书面语的组成部分，用来表示停顿、加强语气等。</p><p>英文标点符号在 16 世纪时，分为朗诵学派和句法学派，主要由古典时期的希腊文和拉丁文演变而来，在 17 世纪后进入稳定阶段。俄文的标点符号依据希腊文而来，到了 18 世纪后也采用了英文标点符号。</p><p>在很多人的印象中，古文是没有标点符号的，但管锡华博士研究指出，中国早在先秦时代就有标点符号了，后来融合了一些英文标点符号后，逐渐形成了现在的中文标点符号。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/core-points/ten-05.png" alt=""></p><p><strong>2）Unicode</strong></p><p>这个世界上，除了英语，还有法语、葡萄牙语、西班牙语、德语、俄语、阿拉伯语、韩语、日语等等等等。ASCII 码用来表示英语是绰绰有余的，但其他这些语言就没办法了。</p><p>像我们的母语，博大精深，汉字的数量很多很多，东汉的《说文解字》收字 9353 个，清朝《康熙字典》收字 47035 个，当代的《汉语大字典》收字 60370 个。1994 年中华书局、中国友谊出版公司出版的《中华字海》收字 85568 个。</p><p>PS：常用字大概 2500 个，次常用字 1000 个。</p><p>一个字节只能表示 256 种符号，所以如果拿 ASCII 码来表示汉字的话，是远远不够用的，那就必须要用更多的字节。简体中文常见的编码方式是 GB2312，使用两个字节表示一个汉字，理论上最多可以表示 256 x 256 = 65536 个符号。</p><p>要知道，世界上存在着多种编码方式，同一个二进制数字可以被解释成不同的符号。因此，要想打开一个文本文件，就必须知道它的编码方式，否则用错误的编码方式解读，就会出现乱码。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/core-points/ten-06.png" alt=""></p><p>PPS：这“锟斤拷”价格挺公道的啊！！！（逃</p><p>如果有一种编码，将世界上所有的符号都纳入其中。每一个符号都给予一个独一无二的编码，那么乱码问题就会彻底消失。</p><p>这个艰巨的任务有谁来完成呢？<strong>Unicode</strong>，中文译作万国码、国际码、统一码、单一码，就像它的名字都表示的，这是一种所有符号的编码。</p><p>Unicode 至今仍在不断增修，每个新版本都会加入更多新的字符。目前最新的版本为 2020 年 3 月公布的 13.0，收录了 13 万个字符。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/core-points/ten-07.png" alt=""></p><p>Unicode 是一个很大的集合，现在的规模可以容纳 100 多万个符号。每个符号的编码都不一样，比如，<code>U+0639</code>表示阿拉伯字母 <code>Ain</code>，<code>U+0041</code> 表示英语的大写字母 <code>A</code>，<code>U+4E25</code> 表示汉字<code>严</code>。</p><p>具体的符号对应表，可以查询 <a href="http://www.unicode.org/" target="_blank" rel="noopener noreferrer">unicode.org<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，或者专门的<a href="http://www.chi2ko.com/tool/CJK.htm" target="_blank" rel="noopener noreferrer">汉字对应表<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>。</p><p>曾有人这样说：</p><blockquote><p>Unicode 支持的字符上限是 65536 个，Unicode 字符必须占两个字节。</p></blockquote><p>但这是一种误解，记住，Unicode 只是一个用来映射字符和数字的标准。它对支持字符的数量没有限制，也不要求字符必须占两个、三个或者其它任意数量的字节，所以它可以无穷大。</p><p>Unicode 虽然统一了全世界字符的编码，但没有规定如何存储。如果统一规定的话，每个符号就要用 3 个或 4 个字节表示，因为 2 个字节只能表示 65536 个，根本表示不全。</p><p>那怎么办呢？</p><p>UTF（Unicode Transformation Formats，Unicode 的编码方式）来了！最常见的就是 UTF-8 和 UTF-16。</p><p>在 UTF-8 中，0-127 号的字符用 1 个字节来表示，使用和 ASCII 相同的编码。只有 128 号及以上的字符才用 2 个、3 个或者 4 个字节来表示。</p><p>如果只有一个字节，那么最高的比特位为 0；如果有多个字节，那么第一个字节从最高位开始，连续有几个比特位的值为 1，就使用几个字节编码，剩下的字节均以 10 开头。</p><p>具体的表现形式为：</p><p>0xxxxxxx：一个字节； 110xxxxx 10xxxxxx：两个字节编码形式（开始两个 1）； 1110xxxx 10xxxxxx 10xxxxxx：三字节编码形式（开始三个 1）； 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx：四字节编码形式（开始四个 1）。</p><p>也就是说，UTF-8 是一种可变长度的编码方式——这是它的优势也是劣势。</p><p>怎么讲呢？优势就是它包罗万象，劣势就是浪费空间。举例来说吧，UTF-8 采用了 3 个字节（256<em>256</em>256=16777216）来编码常用的汉字，但常用的汉字没有这么多，这对于计算机来说，就是一种严重的资源浪费。</p><p>基于这样的考虑，中国国家标准总局于 1980 年发布了 GB 2312 编码，即中华人民共和国国家标准简体中文字符集。GB 2312 标准共收录 6763 个汉字（2 个字节就够用了），其中一级汉字 3755 个，二级汉字 3008 个；同时收录了包括拉丁字母、希腊字母、日文平假名及片假名字母、俄语西里尔字母在内的 682 个字符。</p><p>GB 2312 的出现，基本满足了汉字的计算机处理需求。对于人名、古汉语等方面出现的罕用字和繁体字，GB 2312 不能处理，就有了 GBK（K 为“扩展”的汉语拼音（kuòzhǎn）第一个声母）。</p><p>来看一段代码：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">Demo</span> <span class="token punctuation">{</span>
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class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->彻底弄懂Java中的Unicode和UTF-8编码</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 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354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 9 分钟</span><meta property="timeRequired" content="PT9M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="彻底弄懂java中的unicode和utf-8编码" tabindex="-1"><a class="header-anchor" href="#彻底弄懂java中的unicode和utf-8编码" aria-hidden="true">#</a> 彻底弄懂Java中的Unicode和UTF-8编码</h1><p>“二哥，<a href="https://mp.weixin.qq.com/s/twim3w_dp5ctCigjLGIbFw" target="_blank" rel="noopener noreferrer">上一篇<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>文章中提到了 Unicode，说 Java 中的 char 类型之所以占 2 个字节，是因为 Java 使用的是 Unicode 字符集而不是 ASCII 字符集，我有点迷，想了解一下，能细致给我说说吗？”</p><p>“当然没问题啊，三妹。”</p><p><strong>1）ASCII</strong></p><p>对于计算机来说，只认 0 和 1，所有的信息最终都是一个二进制数。一个二进制数要么是 0，要么是 1，所以 8 个二进制数放在一起（一个字节），就会组合出 256 种状态，也就是 2 的 8 次方（<code>2^8</code>），从 00000000 到 11111111。</p><p>ASCII 码由电报码发展而来，第一版标准发布于 1963 年，最后一次更新则是在1986 年，至今为止共定义了 128 个字符。其中 33 个字符无法显示在一般的设备上，需要用特殊的设备才能显示。</p><p>ASCII 码的局限在于只能显示 26 个基本拉丁字母、阿拉伯数字和英式标点符号，因此只能用于显示现代美国英语，对于其他一些语言则无能无力，比如在法语中，字母上方有注音符号，它就无法用 ASCII 码表示。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/core-points/ten-01.png" alt=""></p><p>PS：拉丁字母（也称为罗马字母）是多数欧洲语言采用的字母系统，是世界上最通行的字母文字系统，是罗马文明的成果之一。</p><p>虽然名称上叫作拉丁字母，但拉丁文中并没有用 J、U 和 W 这三个字母。</p><p>在我们的印象中，可能说拉丁字母多少有些陌生，说英语字母可能就有直观的印象了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/core-points/ten-02.png" alt=""></p><p>PPS：阿拉伯数字，我们都很熟悉了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/core-points/ten-03.png" alt=""></p><p>但是，阿拉伯数字并非起源于阿拉伯，而是起源于古印度。学过历史的我们应该有一些印象，阿拉伯分布于西亚和北非，以阿拉伯语为主要语言，以伊斯兰教为主要信仰。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/core-points/ten-04.png" alt=""></p><p>处在这样的地理位置，做起东亚和欧洲的一些生意就很有优势，于是阿拉伯数字就由阿拉伯人传到了欧洲，因此得名。</p><p>PPPS：英式标点符号，也叫英文标点符号，和中文标点符号很相近。标点符号是辅助文字记录语言的符号，是书面语的组成部分，用来表示停顿、加强语气等。</p><p>英文标点符号在 16 世纪时，分为朗诵学派和句法学派，主要由古典时期的希腊文和拉丁文演变而来，在 17 世纪后进入稳定阶段。俄文的标点符号依据希腊文而来，到了 18 世纪后也采用了英文标点符号。</p><p>在很多人的印象中，古文是没有标点符号的，但管锡华博士研究指出，中国早在先秦时代就有标点符号了，后来融合了一些英文标点符号后，逐渐形成了现在的中文标点符号。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/core-points/ten-05.png" alt=""></p><p><strong>2）Unicode</strong></p><p>这个世界上，除了英语，还有法语、葡萄牙语、西班牙语、德语、俄语、阿拉伯语、韩语、日语等等等等。ASCII 码用来表示英语是绰绰有余的，但其他这些语言就没办法了。</p><p>像我们的母语，博大精深，汉字的数量很多很多，东汉的《说文解字》收字 9353 个，清朝《康熙字典》收字 47035 个，当代的《汉语大字典》收字 60370 个。1994 年中华书局、中国友谊出版公司出版的《中华字海》收字 85568 个。</p><p>PS：常用字大概 2500 个，次常用字 1000 个。</p><p>一个字节只能表示 256 种符号，所以如果拿 ASCII 码来表示汉字的话，是远远不够用的，那就必须要用更多的字节。简体中文常见的编码方式是 GB2312，使用两个字节表示一个汉字，理论上最多可以表示 256 x 256 = 65536 个符号。</p><p>要知道，世界上存在着多种编码方式，同一个二进制数字可以被解释成不同的符号。因此，要想打开一个文本文件，就必须知道它的编码方式，否则用错误的编码方式解读，就会出现乱码。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/core-points/ten-06.png" alt=""></p><p>PPS：这“锟斤拷”价格挺公道的啊！！！（逃</p><p>如果有一种编码，将世界上所有的符号都纳入其中。每一个符号都给予一个独一无二的编码，那么乱码问题就会彻底消失。</p><p>这个艰巨的任务有谁来完成呢？<strong>Unicode</strong>，中文译作万国码、国际码、统一码、单一码，就像它的名字都表示的，这是一种所有符号的编码。</p><p>Unicode 至今仍在不断增修，每个新版本都会加入更多新的字符。目前最新的版本为 2020 年 3 月公布的 13.0，收录了 13 万个字符。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/core-points/ten-07.png" alt=""></p><p>Unicode 是一个很大的集合，现在的规模可以容纳 100 多万个符号。每个符号的编码都不一样，比如，<code>U+0639</code>表示阿拉伯字母 <code>Ain</code>，<code>U+0041</code> 表示英语的大写字母 <code>A</code>，<code>U+4E25</code> 表示汉字<code>严</code>。</p><p>具体的符号对应表，可以查询 <a href="http://www.unicode.org/" target="_blank" rel="noopener noreferrer">unicode.org<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，或者专门的<a href="http://www.chi2ko.com/tool/CJK.htm" target="_blank" rel="noopener noreferrer">汉字对应表<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>。</p><p>曾有人这样说：</p><blockquote><p>Unicode 支持的字符上限是 65536 个，Unicode 字符必须占两个字节。</p></blockquote><p>但这是一种误解，记住，Unicode 只是一个用来映射字符和数字的标准。它对支持字符的数量没有限制，也不要求字符必须占两个、三个或者其它任意数量的字节，所以它可以无穷大。</p><p>Unicode 虽然统一了全世界字符的编码，但没有规定如何存储。如果统一规定的话，每个符号就要用 3 个或 4 个字节表示，因为 2 个字节只能表示 65536 个，根本表示不全。</p><p>那怎么办呢？</p><p>UTF（Unicode Transformation Formats，Unicode 的编码方式）来了！最常见的就是 UTF-8 和 UTF-16。</p><p>在 UTF-8 中，0-127 号的字符用 1 个字节来表示，使用和 ASCII 相同的编码。只有 128 号及以上的字符才用 2 个、3 个或者 4 个字节来表示。</p><p>如果只有一个字节，那么最高的比特位为 0；如果有多个字节，那么第一个字节从最高位开始，连续有几个比特位的值为 1，就使用几个字节编码，剩下的字节均以 10 开头。</p><p>具体的表现形式为：</p><p>0xxxxxxx：一个字节； 110xxxxx 10xxxxxx：两个字节编码形式（开始两个 1）； 1110xxxx 10xxxxxx 10xxxxxx：三字节编码形式（开始三个 1）； 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx：四字节编码形式（开始四个 1）。</p><p>也就是说，UTF-8 是一种可变长度的编码方式——这是它的优势也是劣势。</p><p>怎么讲呢？优势就是它包罗万象，劣势就是浪费空间。举例来说吧，UTF-8 采用了 3 个字节（256<em>256</em>256=16777216）来编码常用的汉字，但常用的汉字没有这么多，这对于计算机来说，就是一种严重的资源浪费。</p><p>基于这样的考虑，中国国家标准总局于 1980 年发布了 GB 2312 编码，即中华人民共和国国家标准简体中文字符集。GB 2312 标准共收录 6763 个汉字（2 个字节就够用了），其中一级汉字 3755 个，二级汉字 3008 个；同时收录了包括拉丁字母、希腊字母、日文平假名及片假名字母、俄语西里尔字母在内的 682 个字符。</p><p>GB 2312 的出现，基本满足了汉字的计算机处理需求。对于人名、古汉语等方面出现的罕用字和繁体字，GB 2312 不能处理，就有了 GBK（K 为“扩展”的汉语拼音（kuòzhǎn）第一个声母）。</p><p>来看一段代码：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">Demo</span> <span class="token punctuation">{</span>
     <span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">void</span> <span class="token function">main</span><span class="token punctuation">(</span><span class="token class-name">String</span><span class="token punctuation">[</span><span class="token punctuation">]</span> args<span class="token punctuation">)</span> <span class="token punctuation">{</span>
         <span class="token class-name">String</span> wanger <span class="token operator">=</span> <span class="token string">&quot;沉默王二&quot;</span><span class="token punctuation">;</span>
         <span class="token keyword">byte</span><span class="token punctuation">[</span><span class="token punctuation">]</span> bytes <span class="token operator">=</span> wanger<span class="token punctuation">.</span><span class="token function">getBytes</span><span class="token punctuation">(</span><span class="token class-name">Charset</span><span class="token punctuation">.</span><span class="token function">forName</span><span class="token punctuation">(</span><span class="token string">&quot;GBK&quot;</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
@@ -60,6 +60,6 @@
 <span class="token comment">// 输出锟斤拷</span>
 <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span>testResult<span class="token punctuation">)</span><span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>PPPS：hutool 的使用方法可以参照我的另外一篇<a href="https://mp.weixin.qq.com/s/hso-Hm5NuFStMu3m0iz_0w" target="_blank" rel="noopener noreferrer">文章<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>。</p><p>所以，以后再见到<strong>锟斤拷</strong>，第一时间想到 UTF-8 和 GBK 的转换问题准没错。</p><p>UTF-16 使用 2 个或者 4 个字节来存储字符。</p><ul><li><p>对于 Unicode 编号范围在 0 ~ FFFF 之间的字符，UTF-16 使用两个字节存储。</p></li><li><p>对于 Unicode 编号范围在 10000 ~ 10FFFF 之间的字符，UTF-16 使用四个字节存储，具体来说就是：将字符编号的所有比特位分成两部分，较高的一些比特位用一个值介于 D800~DBFF 之间的双字节存储，较低的一些比特位（剩下的比特位）用一个值介于 DC00~DFFF 之间的双字节存储。</p></li></ul><p><strong>3）char</strong></p><p>搞清楚了 Unicode 之后，再回头来看 char 为什么是两个字节的问题，就很容易搞明白了。</p><p>在 Unicode 的设计之初，人们认为两个字节足以对世界上各种语言的所有字符进行编码，在 1991 年发布的 Unicode 1.0 中，仅用了 65536 个代码值中不到一半的部分。</p><p>所以，Java 决定采用 16 位的 Unicode 字符集（<a href="https://mp.weixin.qq.com/s/Ctouw652iC0qtrmjen9aEw" target="_blank" rel="noopener noreferrer">诞生于 90 年代<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>）。也就是说，当时的 char 类型可以表示任意一个 Unicode 字符。</p><p>但是，不可避免的事情发生了，Unicode 收录的字符越来越多，超过了 65536 个（2 个字节的最大表示范围）。超过的部分怎么办呢？只能用两个 char 来表示了。</p><p>这个 <code>𐐷</code> 字符很特殊，Unicode 编码是 <code>U+10437</code>，它就无法使用一个 char 来表示，当你尝试用 char 来表示时，它会被 IDEA 转成 UTF-16 十六进制字符代码 <code>\uD801\uDC37</code>（与此同时，编译器会提醒你最好把它声明成 String 类型）。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/core-points/ten-08.png" alt=""></p><p>也就是说，在 Java 中，char 会占用两个字节，超出 char 的承受范围（&#39;\u0000&#39;（0）和 &#39;\uffff&#39;（65,535））的字符，都将无法表示。</p><p>“好了，三妹，关于 Unicode 就先说这么多吧，你是不是已经清楚了？”转动了一下僵硬的脖子后，我对三妹说。</p><p><img 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index a04dea05..3b5f036f 100644
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15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 3 分钟</span><meta property="timeRequired" content="PT3M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="为什么jdk源码中-无限循环大多使用for-而不是while-true" tabindex="-1"><a class="header-anchor" href="#为什么jdk源码中-无限循环大多使用for-而不是while-true" aria-hidden="true">#</a> 为什么JDK源码中，无限循环大多使用for(;;)而不是while(true)?</h1><p>在知乎上看到 R 大的这篇回答，着实感觉需要分享给在座的各位 javaer 们，真心透彻。</p><blockquote><p>https://www.zhihu.com/question/52311366/answer/130090347</p></blockquote><hr><p>首先是先问是不是再问为什么系列。</p><p>在JDK8u的jdk项目下做个很粗略的搜索：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>mymbp:/Users/me/workspace/jdk8u/jdk/src
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class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->为什么JDK源码中，无限循环大多使用for(;;)而不是while(true)?</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月22日</span><meta property="datePublished" content="2022-03-21T21:39:16.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><meta property="articleSection" content="Java核心"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag 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4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 3 分钟</span><meta property="timeRequired" content="PT3M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="为什么jdk源码中-无限循环大多使用for-而不是while-true" tabindex="-1"><a class="header-anchor" href="#为什么jdk源码中-无限循环大多使用for-而不是while-true" aria-hidden="true">#</a> 为什么JDK源码中，无限循环大多使用for(;;)而不是while(true)?</h1><p>在知乎上看到 R 大的这篇回答，着实感觉需要分享给在座的各位 javaer 们，真心透彻。</p><blockquote><p>https://www.zhihu.com/question/52311366/answer/130090347</p></blockquote><hr><p>首先是先问是不是再问为什么系列。</p><p>在JDK8u的jdk项目下做个很粗略的搜索：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>mymbp:/Users/me/workspace/jdk8u/jdk/src
 $ egrep -nr &quot;for \\(\\s?;\\s?;&quot; . | wc -l
      369
 mymbp:/Users/me/workspace/jdk8u/jdk/src
@@ -80,6 +80,6 @@ $ egrep -nr &quot;while \\(true&quot; . | wc -l
          5: goto          2
 */</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>连javac这种几乎什么优化都不做（只做了Java语言规范规定一定要做的常量折叠，和非常少量别的优化）的编译器，对上面俩版本的代码都生成了一样的字节码。后面到解释执行、JIT编译之类的就不用说了，输入都一样，输出也不会不同。</p><hr><p>分享的最后，二哥简单说几句。</p><p>可能在我们普通人眼中，这种问题完全没有求真的必要性，但 R大认真去研究了，并且得出了非常令人信服的答案。</p><p>所以，牛逼之人必有三连之处啊。</p><p>以后就可以放心大胆在代码里写 <code>for(;;) while(true)</code> 这样的死循环了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/basic-extra-meal/jdk-while-for-wuxian-xunhuan.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/14 上午7:14:28</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/basic-extra-meal/jdk9-char-byte-string.html" class="nav-link prev" aria-label="JDK9中String为什么由char[]改成byte[]"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->JDK9中String为什么由char[]改成byte[]</div></a><a href="/basic-extra-meal/class-object.html" class="nav-link next" aria-label="先有Class还是先有Object"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">先有Class还是先有Object<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->jdk9为何要将String的底层实现由char[]改成了byte[]?</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" 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15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 5 分钟</span><meta property="timeRequired" content="PT5M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/basic-extra-meal/jdk9-char-byte-string.html#一、为什么要优化-string-节省内存空间" class="router-link-active router-link-exact-active toc-link level3">一、为什么要优化 String 节省内存空间</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-extra-meal/jdk9-char-byte-string.html#二、byte-为什么就能节省内存空间呢" class="router-link-active router-link-exact-active toc-link level3">二、byte[] 为什么就能节省内存空间呢？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-extra-meal/jdk9-char-byte-string.html#三、为什么用utf-16而不用utf-8呢" class="router-link-active router-link-exact-active toc-link level3">三、为什么用UTF-16而不用UTF-8呢？</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="jdk9为何要将string的底层实现由char-改成了byte" tabindex="-1"><a class="header-anchor" href="#jdk9为何要将string的底层实现由char-改成了byte" aria-hidden="true">#</a> jdk9为何要将String的底层实现由char[]改成了byte[]?</h1><p>大家好，我是二哥呀！如果你不是 Java8 的钉子户，你应该早就发现了：String 类的源码已经由 <code>char[]</code> 优化为了 <code>byte[]</code> 来存储字符串内容，为什么要这样做呢？</p><p>开门见山地说，从 <code>char[]</code> 到 <code>byte[]</code>，最主要的目的是<strong>为了节省字符串占用的内存</strong>。内存占用减少带来的另外一个好处，就是 GC 次数也会减少。</p><h3 id="一、为什么要优化-string-节省内存空间" tabindex="-1"><a class="header-anchor" href="#一、为什么要优化-string-节省内存空间" aria-hidden="true">#</a> 一、为什么要优化 String 节省内存空间</h3><p>我们使用 <code>jmap -histo:live pid | head -n 10</code> 命令就可以查看到堆内对象示例的统计信息、查看 ClassLoader 的信息以及 finalizer 队列。</p><p>以我正在运行着的编程喵喵项目实例（基于 Java 8）来说，结果是这样的。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/basic-extra-meal/jdk9-char-byte-string-d826ce88-bbbe-47a3-a1a9-4dd86dd3632f.png" alt=""></p><p>其中 String 对象有 17638 个，占用了 423312 个字节的内存，排在第三位。</p><p>由于 Java 8 的 String 内部实现仍然是 <code>char[]</code>，所以我们可以看到内存占用排在第 1 位的就是 char 数组。</p><p><code>char[]</code> 对象有 17673 个，占用了 1621352 个字节的内存，排在第一位。</p><p>那也就是说优化 String 节省内存空间是非常有必要的，如果是去优化一个使用频率没有 String 这么高的类库，就显得非常的鸡肋。</p><h3 id="二、byte-为什么就能节省内存空间呢" tabindex="-1"><a class="header-anchor" href="#二、byte-为什么就能节省内存空间呢" aria-hidden="true">#</a> 二、<code>byte[]</code> 为什么就能节省内存空间呢？</h3><p>众所周知，char 类型的数据在 JVM 中是占用两个字节的，并且使用的是 UTF-8 编码，其值范围在 &#39;\u0000&#39;（0）和 &#39;\uffff&#39;（65,535）（包含）之间。</p><p>也就是说，使用 <code>char[]</code> 来表示 String 就导致了即使 String 中的字符只用一个字节就能表示，也得占用两个字节。</p><p>而实际开发中，单字节的字符使用频率仍然要高于双字节的。</p><p>当然了，仅仅将 <code>char[]</code> 优化为 <code>byte[]</code> 是不够的，还要配合 Latin-1 的编码方式，该编码方式是用单个字节来表示字符的，这样就比 UTF-8 编码节省了更多的空间。</p><p>换句话说，对于：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">String</span> name <span class="token operator">=</span> <span class="token string">&quot;jack&quot;</span><span class="token punctuation">;</span>
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class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->jdk9为何要将String的底层实现由char[]改成了byte[]?</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 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href="/basic-extra-meal/jdk9-char-byte-string.html#一、为什么要优化-string-节省内存空间" class="router-link-active router-link-exact-active toc-link level3">一、为什么要优化 String 节省内存空间</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-extra-meal/jdk9-char-byte-string.html#二、byte-为什么就能节省内存空间呢" class="router-link-active router-link-exact-active toc-link level3">二、byte[] 为什么就能节省内存空间呢？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-extra-meal/jdk9-char-byte-string.html#三、为什么用utf-16而不用utf-8呢" class="router-link-active router-link-exact-active toc-link level3">三、为什么用UTF-16而不用UTF-8呢？</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="jdk9为何要将string的底层实现由char-改成了byte" tabindex="-1"><a class="header-anchor" href="#jdk9为何要将string的底层实现由char-改成了byte" aria-hidden="true">#</a> jdk9为何要将String的底层实现由char[]改成了byte[]?</h1><p>大家好，我是二哥呀！如果你不是 Java8 的钉子户，你应该早就发现了：String 类的源码已经由 <code>char[]</code> 优化为了 <code>byte[]</code> 来存储字符串内容，为什么要这样做呢？</p><p>开门见山地说，从 <code>char[]</code> 到 <code>byte[]</code>，最主要的目的是<strong>为了节省字符串占用的内存</strong>。内存占用减少带来的另外一个好处，就是 GC 次数也会减少。</p><h3 id="一、为什么要优化-string-节省内存空间" tabindex="-1"><a class="header-anchor" href="#一、为什么要优化-string-节省内存空间" aria-hidden="true">#</a> 一、为什么要优化 String 节省内存空间</h3><p>我们使用 <code>jmap -histo:live pid | head -n 10</code> 命令就可以查看到堆内对象示例的统计信息、查看 ClassLoader 的信息以及 finalizer 队列。</p><p>以我正在运行着的编程喵喵项目实例（基于 Java 8）来说，结果是这样的。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/basic-extra-meal/jdk9-char-byte-string-d826ce88-bbbe-47a3-a1a9-4dd86dd3632f.png" alt=""></p><p>其中 String 对象有 17638 个，占用了 423312 个字节的内存，排在第三位。</p><p>由于 Java 8 的 String 内部实现仍然是 <code>char[]</code>，所以我们可以看到内存占用排在第 1 位的就是 char 数组。</p><p><code>char[]</code> 对象有 17673 个，占用了 1621352 个字节的内存，排在第一位。</p><p>那也就是说优化 String 节省内存空间是非常有必要的，如果是去优化一个使用频率没有 String 这么高的类库，就显得非常的鸡肋。</p><h3 id="二、byte-为什么就能节省内存空间呢" tabindex="-1"><a class="header-anchor" href="#二、byte-为什么就能节省内存空间呢" aria-hidden="true">#</a> 二、<code>byte[]</code> 为什么就能节省内存空间呢？</h3><p>众所周知，char 类型的数据在 JVM 中是占用两个字节的，并且使用的是 UTF-8 编码，其值范围在 &#39;\u0000&#39;（0）和 &#39;\uffff&#39;（65,535）（包含）之间。</p><p>也就是说，使用 <code>char[]</code> 来表示 String 就导致了即使 String 中的字符只用一个字节就能表示，也得占用两个字节。</p><p>而实际开发中，单字节的字符使用频率仍然要高于双字节的。</p><p>当然了，仅仅将 <code>char[]</code> 优化为 <code>byte[]</code> 是不够的，还要配合 Latin-1 的编码方式，该编码方式是用单个字节来表示字符的，这样就比 UTF-8 编码节省了更多的空间。</p><p>换句话说，对于：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">String</span> name <span class="token operator">=</span> <span class="token string">&quot;jack&quot;</span><span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>这样的，使用 Latin-1 编码，占用 4 个字节就够了。</p><p>但对于：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">String</span> name <span class="token operator">=</span> <span class="token string">&quot;小二&quot;</span><span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>这种，木的办法，只能使用 UTF16 来编码。</p><p>针对 JDK 9 的 String 源码里，为了区别编码方式，追加了一个 coder 字段来区分。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token doc-comment comment">/**
  * The identifier of the encoding used to encode the bytes in
@@ -57,6 +57,6 @@
  */</span>
 <span class="token keyword">private</span> <span class="token keyword">final</span> <span class="token keyword">byte</span> coder<span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>Java 会根据字符串的内容自动设置为相应的编码，要么 Latin-1 要么 UTF16。</p><p>也就是说，从 <code>char[]</code> 到 <code>byte[]</code>，<strong>中文是两个字节，纯英文是一个字节，在此之前呢，中文是两个字节，应为也是两个字节</strong>。</p><h3 id="三、为什么用utf-16而不用utf-8呢" tabindex="-1"><a class="header-anchor" href="#三、为什么用utf-16而不用utf-8呢" aria-hidden="true">#</a> 三、为什么用UTF-16而不用UTF-8呢？</h3><p>在 UTF-8 中，0-127 号的字符用 1 个字节来表示，使用和 ASCII 相同的编码。只有 128 号及以上的字符才用 2 个、3 个或者 4 个字节来表示。</p><ul><li>如果只有一个字节，那么最高的比特位为 0；</li><li>如果有多个字节，那么第一个字节从最高位开始，连续有几个比特位的值为 1，就使用几个字节编码，剩下的字节均以 10 开头。</li></ul><p>具体的表现形式为：</p><ul><li>0xxxxxxx：一个字节；</li><li>110xxxxx 10xxxxxx：两个字节编码形式（开始两个 1）； - 1110xxxx 10xxxxxx 10xxxxxx：三字节编码形式（开始三个 1）；</li><li>11110xxx 10xxxxxx 10xxxxxx 10xxxxxx：四字节编码形式（开始四个 1）。</li></ul><p>关于字符编码，我在《Java 程序员进阶之路》里曾讲到过，想要深入了解的小伙伴查看下面的链接🔗：</p><blockquote><p>https://tobebetterjavaer.com/basic-extra-meal/java-unicode.html</p></blockquote><p>也就是说，UTF-8 是变长的，那对于 String 这种有随机访问方法的类来说，就很不方便。所谓的随机访问，就是charAt、subString这种方法，随便指定一个数字，String要能给出结果。如果字符串中的每个字符占用的内存是不定长的，那么进行随机访问的时候，就需要从头开始数每个字符的长度，才能找到你想要的字符。</p><p>那有小伙伴可能会问，UTF-16也是变长的呢？一个字符还可能占用 4 个字节呢？</p><p>的确，UTF-16 使用 2 个或者 4 个字节来存储字符。</p><ul><li>对于 Unicode 编号范围在 0 ~ FFFF 之间的字符，UTF-16 使用两个字节存储。</li><li>对于 Unicode 编号范围在 10000 ~ 10FFFF 之间的字符，UTF-16 使用四个字节存储，具体来说就是：将字符编号的所有比特位分成两部分，较高的一些比特位用一个值介于 D800~DBFF 之间的双字节存储，较低的一些比特位（剩下的比特位）用一个值介于 DC00~DFFF 之间的双字节存储。</li></ul><p>但是在 Java 中，一个字符（char）就是 2 个字节，占 4 个字节的字符，在 Java 里也是用两个 char 来存储的，而String的各种操作，都是以Java的字符（char）为单位的，charAt是取得第几个char，subString取的也是第几个到第几个char组成的子串，甚至length返回的都是char的个数。</p><p>所以UTF-16在Java的世界里，就可以视为一个定长的编码。</p><blockquote><p>参考链接：https://www.zhihu.com/question/447224628</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/basic-extra-meal/jdk9-char-byte-string.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/14 上午7:14:28</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/basic-extra-meal/comparable-omparator.html" class="nav-link prev" aria-label="Comparable和Comparator的区别"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->Comparable和Comparator的区别</div></a><a href="/basic-extra-meal/jdk-while-for-wuxian-xunhuan.html" class="nav-link next" aria-label="JDK源码无限循环用for(;;)还是while(true)"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">JDK源码无限循环用for(;;)还是while(true)<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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class="page-title"><h1><!---->Java重写(Override)与重载(Overload)</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 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href="/basic-extra-meal/override-overload.html#_03、方法重写" class="router-link-active router-link-exact-active toc-link level3">03、方法重写</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-extra-meal/override-overload.html#_04、总结" class="router-link-active router-link-exact-active toc-link level3">04、总结</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="java重写-override-与重载-overload" tabindex="-1"><a class="header-anchor" href="#java重写-override-与重载-overload" aria-hidden="true">#</a> Java重写(Override)与重载(Overload)</h1><h3 id="_01、开篇" tabindex="-1"><a class="header-anchor" href="#_01、开篇" aria-hidden="true">#</a> 01、开篇</h3><p>入冬的夜，总是来得特别的早。我静静地站在阳台，目光所及之处，不过是若隐若现的钢筋混凝土，还有那毫无情调的灯光。</p><p>“哥，别站在那发呆了。今天学啥啊，七点半我就要回学校了，留给你的时间不多了，你要抓紧哦。”三妹傲娇的声音一下子把我从游离的状态拉回到了现实。</p><p>“今天要学习 Java 中的方法重载与方法重写。”我迅速地走到电脑前面，打开一份 Excel 文档，看了一下《教妹学 Java》的进度，然后对三妹说。</p><p>“如果一个类有多个名字相同但参数个数不同的方法，我们通常称这些方法为方法重载。 ”我面带着朴实无华的微笑继续说，“如果方法的功能是一样的，但参数不同，使用相同的名字可以提高程序的可读性。”</p><p>“如果子类具有和父类一样的方法（参数相同、返回类型相同、方法名相同，但方法体可能不同），我们称之为方法重写。 方法重写用于提供父类已经声明的方法的特殊实现，是实现多态的基础条件。”</p><p>“只不过，方法重载与方法重写在名字上很相似，就像是兄弟俩，导致初学者经常把它们俩搞混。”</p><p>“方法重载的英文名叫 Overloading，方法重写的英文名叫 Overriding，因此，不仅中文名很相近，英文名之间也很相近，这就更容易让初学者搞混了。”</p><p>“但两者其实是完全不同的！通过下面这张图，你就能看得一清二楚。”</p><p>话音刚落，我就在 IDEA 中噼里啪啦地敲了起来。两段代码，分别是方法重写和方法重载。然后，把这两段代码截图到 draw.io（一个很漂亮的在线画图网站）上，加了一些文字说明。最后，打开 Photoscape X，把两张图片合并到了一起。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/core-points/21-01.png" alt=""></p><h3 id="_02、方法重载" tabindex="-1"><a class="header-anchor" href="#_02、方法重载" aria-hidden="true">#</a> 02、方法重载</h3><p>“三妹，你仔细听哦。”我缓了一口气后继续说道。</p><p>“在 Java 中，有两种方式可以达到方法重载的目的。”</p><p>“第一，改变参数的数目。来看下面这段代码。”</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">OverloadingByParamNum</span> <span class="token punctuation">{</span>
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right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java重写(Override)与重载(Overload)</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 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class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/basic-extra-meal/override-overload.html#_01、开篇" class="router-link-active router-link-exact-active toc-link level3">01、开篇</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-extra-meal/override-overload.html#_02、方法重载" class="router-link-active router-link-exact-active toc-link level3">02、方法重载</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-extra-meal/override-overload.html#_03、方法重写" class="router-link-active router-link-exact-active toc-link level3">03、方法重写</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-extra-meal/override-overload.html#_04、总结" class="router-link-active router-link-exact-active toc-link level3">04、总结</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="java重写-override-与重载-overload" tabindex="-1"><a class="header-anchor" href="#java重写-override-与重载-overload" aria-hidden="true">#</a> Java重写(Override)与重载(Overload)</h1><h3 id="_01、开篇" tabindex="-1"><a class="header-anchor" href="#_01、开篇" aria-hidden="true">#</a> 01、开篇</h3><p>入冬的夜，总是来得特别的早。我静静地站在阳台，目光所及之处，不过是若隐若现的钢筋混凝土，还有那毫无情调的灯光。</p><p>“哥，别站在那发呆了。今天学啥啊，七点半我就要回学校了，留给你的时间不多了，你要抓紧哦。”三妹傲娇的声音一下子把我从游离的状态拉回到了现实。</p><p>“今天要学习 Java 中的方法重载与方法重写。”我迅速地走到电脑前面，打开一份 Excel 文档，看了一下《教妹学 Java》的进度，然后对三妹说。</p><p>“如果一个类有多个名字相同但参数个数不同的方法，我们通常称这些方法为方法重载。 ”我面带着朴实无华的微笑继续说，“如果方法的功能是一样的，但参数不同，使用相同的名字可以提高程序的可读性。”</p><p>“如果子类具有和父类一样的方法（参数相同、返回类型相同、方法名相同，但方法体可能不同），我们称之为方法重写。 方法重写用于提供父类已经声明的方法的特殊实现，是实现多态的基础条件。”</p><p>“只不过，方法重载与方法重写在名字上很相似，就像是兄弟俩，导致初学者经常把它们俩搞混。”</p><p>“方法重载的英文名叫 Overloading，方法重写的英文名叫 Overriding，因此，不仅中文名很相近，英文名之间也很相近，这就更容易让初学者搞混了。”</p><p>“但两者其实是完全不同的！通过下面这张图，你就能看得一清二楚。”</p><p>话音刚落，我就在 IDEA 中噼里啪啦地敲了起来。两段代码，分别是方法重写和方法重载。然后，把这两段代码截图到 draw.io（一个很漂亮的在线画图网站）上，加了一些文字说明。最后，打开 Photoscape X，把两张图片合并到了一起。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/core-points/21-01.png" alt=""></p><h3 id="_02、方法重载" tabindex="-1"><a class="header-anchor" href="#_02、方法重载" aria-hidden="true">#</a> 02、方法重载</h3><p>“三妹，你仔细听哦。”我缓了一口气后继续说道。</p><p>“在 Java 中，有两种方式可以达到方法重载的目的。”</p><p>“第一，改变参数的数目。来看下面这段代码。”</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">OverloadingByParamNum</span> <span class="token punctuation">{</span>
     <span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">void</span> <span class="token function">main</span><span class="token punctuation">(</span><span class="token class-name">String</span><span class="token punctuation">[</span><span class="token punctuation">]</span> args<span class="token punctuation">)</span> <span class="token punctuation">{</span>
         <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token class-name">Adder</span><span class="token punctuation">.</span><span class="token function">add</span><span class="token punctuation">(</span><span class="token number">10</span><span class="token punctuation">,</span> <span class="token number">19</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
         <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token class-name">Adder</span><span class="token punctuation">.</span><span class="token function">add</span><span class="token punctuation">(</span><span class="token number">10</span><span class="token punctuation">,</span> <span class="token number">19</span><span class="token punctuation">,</span> <span class="token number">20</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
@@ -171,6 +171,6 @@
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>我把鼠标移动到 Bike 类的 <code>run()</code> 方法，对三妹说：“你看，在方法重写的时候，IDEA 会建议使用 <code>@Override</code> 注解，显式的表示这是一个重写后的方法，尽管可以缺省。”</p><p>“来看一下程序的输出结果。”</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>自行车在跑
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>“Bike 重写了 <code>run()</code> 方法，也就意味着，Bike 可以跑出自己的风格。”</p><h3 id="_04、总结" tabindex="-1"><a class="header-anchor" href="#_04、总结" aria-hidden="true">#</a> 04、总结</h3><p>“好了，三妹，我来简单做个总结。”我瞥了一眼电脑右上角的时钟，离三妹离开的时间不到 10 分钟了。</p><p>“首先来说一下方法重载时的注意事项，‘两同一不同’。”</p><p>“‘两同’：在同一个类，方法名相同。”</p><p>“‘一不同’：参数不同。”</p><p>“再来说一下方法重写时的注意事项，‘两同一小一大’。”</p><p>“‘两同’：方法名相同，参数相同。”</p><p>“‘一小’：子类方法声明的异常类型要比父类小一些或者相等。”</p><p>“‘一大’：子类方法的访问权限应该比父类的更大或者相等。”</p><p>“记住了吧？三妹。带上口罩，拿好手机，咱准备出门吧。”今天限号，没法开车送三妹去学校了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/basic-extra-meal/override-overload.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/14 上午7:14:28</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/basic-extra-meal/equals-hashcode.html" class="nav-link prev" aria-label="重写equals时为什么要重写hashCode"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->重写equals时为什么要重写hashCode</div></a><a href="/basic-extra-meal/Overriding.html" class="nav-link next" aria-label="重写时应当遵守的11条规则"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">重写时应当遵守的11条规则<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 5 分钟</span><meta property="timeRequired" content="PT5M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="java到底是值传递还是引用传递" tabindex="-1"><a class="header-anchor" href="#java到底是值传递还是引用传递" aria-hidden="true">#</a> Java到底是值传递还是引用传递？</h1><p>“哥，说说 Java 到底是值传递还是引用传递吧？”三妹一脸的困惑，看得出来她被这个问题折磨得不轻。</p><p>“说实在的，我在一开始学 Java 的时候也被这个问题折磨得够呛，总以为基本数据类型在传参的时候是值传递，而引用类型是引用传递。”我对三妹袒露了心声，为的就是让她不再那么焦虑，她哥当年也是这么过来的。</p><p>C 语言是很多编程语言的母胎，包括 Java，那么对于 C 语言来说，所有的方法参数都是“通过值”传递的，也就是说，传递给被调用方法的参数值存放在临时变量中，而不是存放在原来的变量中。这就意味着，被调用的方法不能修改调用方法中变量的值，而只能修改其私有变量的临时副本的值。</p><p>Java 继承了 C 语言这一特性，因此 Java 是按照值来传递的。</p><p>接下来，我们必须得搞清楚，到底什么是值传递（pass by value），什么是引用传递（pass by reference），否则，讨论 Java 到底是值传递还是引用传递就显得毫无意义。</p><p>当一个参数按照值的方式在两个方法之间传递时，调用者和被调用者其实是用的两个不同的变量——被调用者中的变量（原始值）是调用者中变量的一份拷贝，对它们当中的任何一个变量修改都不会影响到另外一个变量，据说 Fortran 语言是通过引用传递的。</p><p>“Fortran 语言？”三妹睁大了双眼，似乎听见了什么新的名词。</p><p>“是的，Fortran 语言，1957 年由 IBM 公司开发，是世界上第一个被正式采用并流传至今的高级编程语言。”</p><p>当一个参数按照引用传递的方式在两个方法之间传递时，调用者和被调用者其实用的是同一个变量，当该变量被修改时，双方都是可见的。</p><p>“我们之所以容易搞不清楚 Java 到底是值传递还是引用传递，主要是因为 Java 中的两类数据类型的叫法容易引发误会，比如说 int 是基本类型，说它是值传递的，我们就很容易理解；但对于引用类型，比如说 String，说它也是值传递的时候，我们就容易弄不明白。”</p><p>我们来看看基本数据类型和引用数据类型之间的差别。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">int</span> age <span class="token operator">=</span> <span class="token number">18</span><span class="token punctuation">;</span>
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458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 5 分钟</span><meta property="timeRequired" content="PT5M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="java到底是值传递还是引用传递" tabindex="-1"><a class="header-anchor" href="#java到底是值传递还是引用传递" aria-hidden="true">#</a> Java到底是值传递还是引用传递？</h1><p>“哥，说说 Java 到底是值传递还是引用传递吧？”三妹一脸的困惑，看得出来她被这个问题折磨得不轻。</p><p>“说实在的，我在一开始学 Java 的时候也被这个问题折磨得够呛，总以为基本数据类型在传参的时候是值传递，而引用类型是引用传递。”我对三妹袒露了心声，为的就是让她不再那么焦虑，她哥当年也是这么过来的。</p><p>C 语言是很多编程语言的母胎，包括 Java，那么对于 C 语言来说，所有的方法参数都是“通过值”传递的，也就是说，传递给被调用方法的参数值存放在临时变量中，而不是存放在原来的变量中。这就意味着，被调用的方法不能修改调用方法中变量的值，而只能修改其私有变量的临时副本的值。</p><p>Java 继承了 C 语言这一特性，因此 Java 是按照值来传递的。</p><p>接下来，我们必须得搞清楚，到底什么是值传递（pass by value），什么是引用传递（pass by reference），否则，讨论 Java 到底是值传递还是引用传递就显得毫无意义。</p><p>当一个参数按照值的方式在两个方法之间传递时，调用者和被调用者其实是用的两个不同的变量——被调用者中的变量（原始值）是调用者中变量的一份拷贝，对它们当中的任何一个变量修改都不会影响到另外一个变量，据说 Fortran 语言是通过引用传递的。</p><p>“Fortran 语言？”三妹睁大了双眼，似乎听见了什么新的名词。</p><p>“是的，Fortran 语言，1957 年由 IBM 公司开发，是世界上第一个被正式采用并流传至今的高级编程语言。”</p><p>当一个参数按照引用传递的方式在两个方法之间传递时，调用者和被调用者其实用的是同一个变量，当该变量被修改时，双方都是可见的。</p><p>“我们之所以容易搞不清楚 Java 到底是值传递还是引用传递，主要是因为 Java 中的两类数据类型的叫法容易引发误会，比如说 int 是基本类型，说它是值传递的，我们就很容易理解；但对于引用类型，比如说 String，说它也是值传递的时候，我们就容易弄不明白。”</p><p>我们来看看基本数据类型和引用数据类型之间的差别。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">int</span> age <span class="token operator">=</span> <span class="token number">18</span><span class="token punctuation">;</span>
 <span class="token class-name">String</span> name <span class="token operator">=</span> <span class="token string">&quot;二哥&quot;</span><span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><p>age 是基本类型，值就保存在变量中，而 name 是引用类型，变量中保存的是对象的地址。一般称这种变量为对象的引用，引用存放在栈中，而对象存放在堆中。</p><p>这里说的栈和堆，是指内存中的一块区域，和数据结构中的栈和堆不一样。栈是由编译器自动分配释放的，所以适合存放编译期就确定生命周期的数据；而堆中存放的数据，编译器是不需要知道生命周期的，创建后的回收工作由垃圾收集器来完成。</p><p>“画幅图。”</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/core-points/pass-by-value-01.png" alt=""></p><p>当用 = 赋值运算符改变 age 和 name 的值时。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code>age <span class="token operator">=</span> <span class="token number">16</span><span class="token punctuation">;</span>
 name <span class="token operator">=</span> <span class="token string">&quot;三妹&quot;</span><span class="token punctuation">;</span>
@@ -81,6 +81,6 @@ name <span class="token operator">=</span> <span class="token string">&quot;三
     <span class="token punctuation">}</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>在调用 <code>modify()</code> 方法的时候，形参 name1 复制了 name 的地址，指向的是堆中“二哥”的位置。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/core-points/pass-by-value-03.png" alt=""></p><p>当 <code>modify()</code> 方法调用结束后，改变了形参 name1 的地址，但 <code>main()</code> 方法中 name 并没有发生改变。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/core-points/pass-by-value-04.png" alt=""></p><p>总结：</p><ul><li>Java 中的参数传递是按值传递的。</li><li>如果参数是基本类型，传递的是基本类型的字面量值的拷贝。</li><li>如果参数是引用类型，传递的是引用的对象在堆中地址的拷贝。</li></ul><p>“好了，三妹，今天的学习就到这吧。”</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/basic-extra-meal/pass-by-value.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/14 上午7:14:28</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/basic-extra-meal/Overriding.html" class="nav-link prev" aria-label="重写时应当遵守的11条规则"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->重写时应当遵守的11条规则</div></a><a href="/basic-extra-meal/true-generic.html" class="nav-link next" aria-label="Java为什么不能实现真正的泛型"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">Java为什么不能实现真正的泛型<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java不能实现真正泛型的原因是什么？</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 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106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><meta property="articleSection" content="Java核心"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 7 分钟</span><meta property="timeRequired" content="PT7M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="java不能实现真正泛型的原因是什么" tabindex="-1"><a class="header-anchor" href="#java不能实现真正泛型的原因是什么" aria-hidden="true">#</a> Java不能实现真正泛型的原因是什么？</h1><p>“二哥，为啥 Java 不能实现真正泛型啊？”三妹开门见山地问。</p><p>简单来回顾一下类型擦除，看下面这段代码。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">Cmower</span> <span class="token punctuation">{</span>
     <span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">void</span> <span class="token function">method</span><span class="token punctuation">(</span><span class="token class-name">ArrayList</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">String</span><span class="token punctuation">&gt;</span></span> list<span class="token punctuation">)</span> <span class="token punctuation">{</span>
         <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">&quot;Arraylist&lt;String&gt; list&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
     <span class="token punctuation">}</span>
@@ -100,6 +100,6 @@ list<span class="token punctuation">.</span><span class="token function">add</sp
 list <span class="token operator">=</span> ints<span class="token punctuation">;</span>
 list <span class="token operator">=</span> strs<span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>“兼容性表现在上面这段代码必须得能够编译运行。怎么办呢？”我扭头看了一下旁边的三妹，继续说。</p><p>“只能搞类型擦除了！”我妹肯定地回答。</p><p>“是滴。”</p><p>编译前进行泛型检测，<code>ArrayList&lt;Integer&gt;</code> 只能放 Integer，<code>ArrayList&lt;String&gt;</code> 只能放 String，取的时候就不用担心类型强转出错了。</p><p>但编译后的字节码文件里，是没有泛型的，放的都是 Object。</p><p>Java 神奇就神奇在这，表面上万物皆对象，但为了性能上的考量，又存在 int、double 这种原始类型，但原始类型又没办法和 Object 兼容，于是我们就只能写 <code>ArrayList&lt;Integer&gt;</code> 这样很占用内存空间的代码。</p><p>这恐怕也是 Java 泛型被吐槽的原因之一了。</p><p>一个好消息是 Valhalla 项目正在努力解决这些因为泛型擦除带来的历史遗留问题。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/generic/true-generic-03.png" alt=""></p><p>Project Valhalla：正在进行当中的 OpenJDK 项目，计划给未来的 Java 添加改进的泛型支持。</p><blockquote><p>源码地址：http://openjdk.java.net/projects/valhalla/</p></blockquote><p>让我们拭目以待吧！</p><p>“怎么样？三妹，这下全部都明白了吧！”我问。</p><p>“嗯嗯。二哥，你讲得可真棒👍”三妹夸奖得我有点小开心，嘿嘿。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/basic-extra-meal/true-generic.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/14 上午7:14:28</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/basic-extra-meal/pass-by-value.html" class="nav-link prev" aria-label="Java到底是值传递还是引用传递"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->Java到底是值传递还是引用传递</div></a><a href="/basic-extra-meal/comparable-omparator.html" class="nav-link next" aria-label="Comparable和Comparator的区别"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">Comparable和Comparator的区别<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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clickable"><!----><span class="title">2.6 IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button 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class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java中可变参数的使用</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 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145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 4 分钟</span><meta property="timeRequired" content="PT4M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="java中可变参数的使用" tabindex="-1"><a class="header-anchor" href="#java中可变参数的使用" aria-hidden="true">#</a> Java中可变参数的使用</h1><p>为了让铁粉们能白票到阿里云的服务器，老王当了整整两天的客服，真正体验到了什么叫做“为人民群众谋福利”的不易和辛酸。正在他眼睛红肿打算要休息之际，小二跑过来问他：“Java 的可变参数究竟是怎么一回事？”老王一下子又清醒了，他爱 Java，他爱传道解惑，他爱这群尊敬他的读者。</p><p>可变参数是 Java 1.5 的时候引入的功能，它允许方法使用任意多个、类型相同（<code>is-a</code>）的值作为参数。就像下面这样。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">void</span> <span class="token function">main</span><span class="token punctuation">(</span><span class="token class-name">String</span><span class="token punctuation">[</span><span class="token punctuation">]</span> args<span class="token punctuation">)</span> <span class="token punctuation">{</span>
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class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java中可变参数的使用</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2021年11月8日</span><meta property="datePublished" content="2021-11-08T13:04:25.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><meta property="articleSection" content="Java核心"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 4 分钟</span><meta property="timeRequired" content="PT4M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="java中可变参数的使用" tabindex="-1"><a class="header-anchor" href="#java中可变参数的使用" aria-hidden="true">#</a> Java中可变参数的使用</h1><p>为了让铁粉们能白票到阿里云的服务器，老王当了整整两天的客服，真正体验到了什么叫做“为人民群众谋福利”的不易和辛酸。正在他眼睛红肿打算要休息之际，小二跑过来问他：“Java 的可变参数究竟是怎么一回事？”老王一下子又清醒了，他爱 Java，他爱传道解惑，他爱这群尊敬他的读者。</p><p>可变参数是 Java 1.5 的时候引入的功能，它允许方法使用任意多个、类型相同（<code>is-a</code>）的值作为参数。就像下面这样。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">void</span> <span class="token function">main</span><span class="token punctuation">(</span><span class="token class-name">String</span><span class="token punctuation">[</span><span class="token punctuation">]</span> args<span class="token punctuation">)</span> <span class="token punctuation">{</span>
     <span class="token function">print</span><span class="token punctuation">(</span><span class="token string">&quot;沉&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
     <span class="token function">print</span><span class="token punctuation">(</span><span class="token string">&quot;沉&quot;</span><span class="token punctuation">,</span> <span class="token string">&quot;默&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
     <span class="token function">print</span><span class="token punctuation">(</span><span class="token string">&quot;沉&quot;</span><span class="token punctuation">,</span> <span class="token string">&quot;默&quot;</span><span class="token punctuation">,</span> <span class="token string">&quot;王&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
@@ -101,6 +101,6 @@ logger<span class="token punctuation">.</span><span class="token function">debug
 <span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">void</span> <span class="token function">print</span><span class="token punctuation">(</span><span class="token class-name">Integer</span><span class="token punctuation">.</span><span class="token punctuation">.</span><span class="token punctuation">.</span> ints<span class="token punctuation">)</span> <span class="token punctuation">{</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>上面这段代码是可以编译通过的。因为编译器知道参数是 String 类型还是 Integer 类型，只不过为了运行时不抛出 <code>NullPointerException</code>，两个 <code>print()</code> 方法的内部要做好判空操作。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/basic-extra-meal/varables.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/14 上午7:14:28</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/basic-extra-meal/immutable.html" class="nav-link prev" aria-label="不可变对象"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->不可变对象</div></a><a href="/basic-extra-meal/generic.html" class="nav-link next" aria-label="泛型"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">泛型<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
-    <script type="module" src="/assets/app.a0271b9c.js" defer></script>
+    <script type="module" src="/assets/app.615e41d8.js" defer></script>
   </body>
 </html>
diff --git a/dist/basic-grammar/basic-data-type.html b/dist/basic-grammar/basic-data-type.html
index c46a15b3..6deeb80b 100644
--- a/dist/basic-grammar/basic-data-type.html
+++ b/dist/basic-grammar/basic-data-type.html
@@ -39,10 +39,10 @@
       }
     </script>
     <link rel="stylesheet" href="/assets/style.aa7884a9.css">
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+    <link rel="modulepreload" href="/assets/app.615e41d8.js"><link rel="modulepreload" href="/assets/basic-data-type.html.20d3399e.js"><link rel="modulepreload" href="/assets/plugin-vue_export-helper.21dcd24c.js"><link rel="modulepreload" href="/assets/basic-data-type.html.6be3e7e2.js">
   </head>
   <body>
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class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java 支持的 8 种基本数据类型</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" 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href="/basic-grammar/basic-data-type.html#_04、int" class="router-link-active router-link-exact-active toc-link level3">04、int</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-grammar/basic-data-type.html#_05、long" class="router-link-active router-link-exact-active toc-link level3">05、long</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-grammar/basic-data-type.html#_06、float" class="router-link-active router-link-exact-active toc-link level3">06、float</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-grammar/basic-data-type.html#_07、double" class="router-link-active router-link-exact-active toc-link level3">07、double</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-grammar/basic-data-type.html#_08、char" class="router-link-active router-link-exact-active toc-link level3">08、char</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="java-支持的-8-种基本数据类型" tabindex="-1"><a class="header-anchor" href="#java-支持的-8-种基本数据类型" aria-hidden="true">#</a> Java 支持的 8 种基本数据类型</h1><p>“二哥，<a href="https://mp.weixin.qq.com/s/IgBpLGn0L1HZymgI4hWGVA" target="_blank" rel="noopener noreferrer">上一节<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>提到了 Java 变量的数据类型，是不是指定了类型就限定了变量的取值范围啊？”三妹吸了一口麦香可可奶茶后对我说。</p><p>“三妹，你不得了啊，长进很大嘛，都学会推理判断了。Java 是一种静态类型的编程语言，这意味着所有变量必须在使用之前声明好，也就是必须得先指定变量的类型和名称。”</p><p>Java 中的数据类型可分为 2 种：</p><p>1）<strong>基本数据类型</strong>。</p><p>基本数据类型是 Java 语言操作数据的基础，包括 boolean、char、byte、short、int、long、float 和 double，共 8 种。</p><p>2）<strong>引用数据类型</strong>。</p><p>除了基本数据类型以外的类型，都是所谓的引用类型。常见的有数组（对，没错，数组是引用类型）、class（也就是类），以及接口（指向的是实现接口的类的对象）。</p><p>来个思维导图，感受下。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/core-grammar/nine-01.png" alt=""></p><p>通过<a href="https://mp.weixin.qq.com/s/IgBpLGn0L1HZymgI4hWGVA" target="_blank" rel="noopener noreferrer">上一节<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>的学习，我们知道变量可以分为局部变量、成员变量、静态变量。</p><p>当变量是局部变量的时候，必须得先初始化，否则编译器不允许你使用它。拿 int 来举例吧，看下图。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/core-grammar/nine-02.png" alt=""></p><p>当变量是成员变量或者静态变量时，可以不进行初始化，它们会有一个默认值，仍然以 int 为例，来看代码：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token doc-comment comment">/**
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class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-grammar/operator.html" class="nav-link sidebar-link sidebar-page" aria-label="运算符"><!---->运算符<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-grammar/javadoc.html" class="nav-link sidebar-link sidebar-page" aria-label="注释"><!---->注释<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-extra-meal/48-keywords.html" class="nav-link sidebar-link sidebar-page" aria-label="关键字"><!---->关键字<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-extra-meal/java-naming.html" class="nav-link sidebar-link sidebar-page" aria-label="命名规范"><!---->命名规范<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.3 面向对象编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.4 字符串&amp;数组</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.5 集合框架（容器）</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.6 IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.11 并发编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java 支持的 8 种基本数据类型</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 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106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><meta property="articleSection" content="Java核心"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 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class="router-link-active router-link-exact-active toc-link level3">01、布尔</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-grammar/basic-data-type.html#_02、byte" class="router-link-active router-link-exact-active toc-link level3">02、byte</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-grammar/basic-data-type.html#_03、short" class="router-link-active router-link-exact-active toc-link level3">03、short</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-grammar/basic-data-type.html#_04、int" class="router-link-active router-link-exact-active toc-link level3">04、int</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-grammar/basic-data-type.html#_05、long" class="router-link-active router-link-exact-active toc-link level3">05、long</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-grammar/basic-data-type.html#_06、float" class="router-link-active router-link-exact-active toc-link level3">06、float</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-grammar/basic-data-type.html#_07、double" class="router-link-active router-link-exact-active toc-link level3">07、double</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-grammar/basic-data-type.html#_08、char" class="router-link-active router-link-exact-active toc-link level3">08、char</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="java-支持的-8-种基本数据类型" tabindex="-1"><a class="header-anchor" href="#java-支持的-8-种基本数据类型" aria-hidden="true">#</a> Java 支持的 8 种基本数据类型</h1><p>“二哥，<a href="https://mp.weixin.qq.com/s/IgBpLGn0L1HZymgI4hWGVA" target="_blank" rel="noopener noreferrer">上一节<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>提到了 Java 变量的数据类型，是不是指定了类型就限定了变量的取值范围啊？”三妹吸了一口麦香可可奶茶后对我说。</p><p>“三妹，你不得了啊，长进很大嘛，都学会推理判断了。Java 是一种静态类型的编程语言，这意味着所有变量必须在使用之前声明好，也就是必须得先指定变量的类型和名称。”</p><p>Java 中的数据类型可分为 2 种：</p><p>1）<strong>基本数据类型</strong>。</p><p>基本数据类型是 Java 语言操作数据的基础，包括 boolean、char、byte、short、int、long、float 和 double，共 8 种。</p><p>2）<strong>引用数据类型</strong>。</p><p>除了基本数据类型以外的类型，都是所谓的引用类型。常见的有数组（对，没错，数组是引用类型）、class（也就是类），以及接口（指向的是实现接口的类的对象）。</p><p>来个思维导图，感受下。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/core-grammar/nine-01.png" alt=""></p><p>通过<a href="https://mp.weixin.qq.com/s/IgBpLGn0L1HZymgI4hWGVA" target="_blank" rel="noopener noreferrer">上一节<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>的学习，我们知道变量可以分为局部变量、成员变量、静态变量。</p><p>当变量是局部变量的时候，必须得先初始化，否则编译器不允许你使用它。拿 int 来举例吧，看下图。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/core-grammar/nine-02.png" alt=""></p><p>当变量是成员变量或者静态变量时，可以不进行初始化，它们会有一个默认值，仍然以 int 为例，来看代码：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token doc-comment comment">/**
  * <span class="token keyword">@author</span> 微信搜「沉默王二」，回复关键字 PDF
  */</span>
 <span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">LocalVar</span> <span class="token punctuation">{</span>
@@ -113,6 +113,6 @@ null
         <span class="token keyword">implements</span> <span class="token class-name">List</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">E</span><span class="token punctuation">&gt;</span></span><span class="token punctuation">,</span> <span class="token class-name">RandomAccess</span><span class="token punctuation">,</span> <span class="token class-name">Cloneable</span><span class="token punctuation">,</span> <span class="token class-name"><span class="token namespace">java<span class="token punctuation">.</span>io<span class="token punctuation">.</span></span>Serializable</span>
 <span class="token punctuation">{</span><span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>对于接口类型的引用变量来说，你没法直接 new 一个：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/core-grammar/nine-07.png" alt=""></p><p>只能 new 一个实现它的类的对象——那自然接口也是引用数据类型了。</p><p>来看一下基本数据类型和引用数据类型之间最大的差别。</p><p>基本数据类型：</p><ul><li>1、变量名指向具体的数值。</li><li>2、基本数据类型存储在栈上。</li></ul><p>引用数据类型：</p><ul><li>1、变量名指向的是存储对象的内存地址，在栈上。</li><li>2、内存地址指向的对象存储在堆上。</li></ul><p>看到这，三妹是不是又要问，“堆是什么，栈又是什么？”</p><p>堆是堆（heap），栈是栈（stack），如果看到“堆栈”的话，请不要怀疑自己，那是翻译的错，堆栈也是栈，反正我很不喜欢“堆栈”这种叫法，容易让新人掉坑里。</p><p>堆是在程序运行时在内存中申请的空间（可理解为动态的过程）；切记，不是在编译时；因此，Java 中的对象就放在这里，这样做的好处就是：</p><blockquote><p>当需要一个对象时，只需要通过 new 关键字写一行代码即可，当执行这行代码时，会自动在内存的“堆”区分配空间——这样就很灵活。</p></blockquote><p>栈，能够和处理器（CPU，也就是脑子）直接关联，因此访问速度更快。既然访问速度快，要好好利用啊！Java 就把对象的引用放在栈里。为什么呢？因为引用的使用频率高吗？</p><p>不是的，因为 Java 在编译程序时，必须明确的知道存储在栈里的东西的生命周期，否则就没法释放旧的内存来开辟新的内存空间存放引用——空间就那么大，前浪要把后浪拍死在沙滩上啊。</p><p>这么说就理解了吧？</p><p>“好了，三妹，关于 Java 中的数据类型就先说这么多吧，你是不是已经清楚了？”转动了一下僵硬的脖子后，我对三妹说。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/basic-grammar/basic-data-type.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/14 上午7:14:28</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><!----><a href="/basic-grammar/flow-control.html" class="nav-link next" aria-label="流程控制语句"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">流程控制语句<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.3 面向对象编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.4 字符串&amp;数组</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.5 集合框架（容器）</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.6 IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.11 并发编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java流程控制语句</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 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class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/basic-grammar/flow-control.html#_01、if-else-相关" class="router-link-active router-link-exact-active toc-link level3">01、if-else 相关</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-grammar/flow-control.html#_02、switch-语句" class="router-link-active router-link-exact-active toc-link level3">02、switch 语句</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-grammar/flow-control.html#_03、for-循环" class="router-link-active router-link-exact-active toc-link level3">03、for 循环</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-grammar/flow-control.html#_04、while-循环" class="router-link-active router-link-exact-active toc-link level3">04、while 循环</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-grammar/flow-control.html#_05、do-while-循环" class="router-link-active router-link-exact-active toc-link level3">05、do-while 循环</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-grammar/flow-control.html#_06、break" class="router-link-active router-link-exact-active toc-link level3">06、break</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-grammar/flow-control.html#_07、continue" class="router-link-active router-link-exact-active toc-link level3">07、continue</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="java流程控制语句" tabindex="-1"><a class="header-anchor" href="#java流程控制语句" aria-hidden="true">#</a> Java流程控制语句</h1><p>“二哥，流程控制语句都有哪些呢？”三妹的脸上泛着甜甜的笑容，她开始对接下来要学习的内容充满期待了，这正是我感到欣慰的地方。</p><p>“比如说 if-else、switch、for、while、do-while、return、break、continue 等等，接下来，我们一个个来了解下。”</p><h3 id="_01、if-else-相关" tabindex="-1"><a class="header-anchor" href="#_01、if-else-相关" aria-hidden="true">#</a> 01、if-else 相关</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/control/thirteen-01.png" alt=""></p><p><strong>1）if 语句</strong></p><p>if 语句的格式如下：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">if</span><span class="token punctuation">(</span>布尔表达式<span class="token punctuation">)</span><span class="token punctuation">{</span>  
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class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java流程控制语句</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" 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class="router-link-active router-link-exact-active toc-link level3">02、switch 语句</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-grammar/flow-control.html#_03、for-循环" class="router-link-active router-link-exact-active toc-link level3">03、for 循环</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-grammar/flow-control.html#_04、while-循环" class="router-link-active router-link-exact-active toc-link level3">04、while 循环</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-grammar/flow-control.html#_05、do-while-循环" class="router-link-active router-link-exact-active toc-link level3">05、do-while 循环</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-grammar/flow-control.html#_06、break" class="router-link-active router-link-exact-active toc-link level3">06、break</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-grammar/flow-control.html#_07、continue" class="router-link-active router-link-exact-active toc-link level3">07、continue</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="java流程控制语句" tabindex="-1"><a class="header-anchor" href="#java流程控制语句" aria-hidden="true">#</a> Java流程控制语句</h1><p>“二哥，流程控制语句都有哪些呢？”三妹的脸上泛着甜甜的笑容，她开始对接下来要学习的内容充满期待了，这正是我感到欣慰的地方。</p><p>“比如说 if-else、switch、for、while、do-while、return、break、continue 等等，接下来，我们一个个来了解下。”</p><h3 id="_01、if-else-相关" tabindex="-1"><a class="header-anchor" href="#_01、if-else-相关" aria-hidden="true">#</a> 01、if-else 相关</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/control/thirteen-01.png" alt=""></p><p><strong>1）if 语句</strong></p><p>if 语句的格式如下：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">if</span><span class="token punctuation">(</span>布尔表达式<span class="token punctuation">)</span><span class="token punctuation">{</span>  
 <span class="token comment">// 如果条件为 true，则执行这块代码</span>
 <span class="token punctuation">}</span> 
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>画个流程图表示一下：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/control/thirteen-02.png" alt=""></p><p>来写个示例：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">IfExample</span> <span class="token punctuation">{</span>
@@ -468,6 +468,6 @@
 9
 10
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>注意：同样的，如果把 if 条件中的“i++”省略掉的话，程序就会进入死循环，一直在 continue。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/basic-grammar/flow-control.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/14 上午7:14:28</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/basic-grammar/basic-data-type.html" class="nav-link prev" aria-label="基本数据类型"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->基本数据类型</div></a><a href="/basic-grammar/operator.html" class="nav-link next" aria-label="运算符"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">运算符<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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diff --git a/dist/basic-grammar/javadoc.html b/dist/basic-grammar/javadoc.html
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class="sidebar-heading clickable"><!----><span class="title">2.6 IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section 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right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java注释：单行、多行和文档注释</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" 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213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 4 分钟</span><meta property="timeRequired" content="PT4M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/basic-grammar/javadoc.html#_01、单行注释" class="router-link-active router-link-exact-active toc-link level3">01、单行注释</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-grammar/javadoc.html#_02、多行注释" class="router-link-active router-link-exact-active toc-link level3">02、多行注释</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-grammar/javadoc.html#_03、文档注释" class="router-link-active router-link-exact-active toc-link level3">03、文档注释</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-grammar/javadoc.html#_04、文档注释的注意事项" class="router-link-active router-link-exact-active toc-link level3">04、文档注释的注意事项</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-grammar/javadoc.html#_05、注释规约" class="router-link-active router-link-exact-active toc-link level3">05、注释规约</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="java注释-单行、多行和文档注释" tabindex="-1"><a class="header-anchor" href="#java注释-单行、多行和文档注释" aria-hidden="true">#</a> Java注释：单行、多行和文档注释</h1><p>“二哥，Java 中的注释好像真没什么可讲的，我已经提前预习了，不过是单行注释，多行注释，还有文档注释。”三妹的脸上泛着甜甜的笑容，她竟然提前预习了接下来要学习的知识，有一种“士别三日，当刮目相看”的感觉。</p><p>“注释的种类确实不多，但还是挺有意思的，且听哥来给你说道说道。”</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/overview/fourteen-01.png" alt=""></p><h3 id="_01、单行注释" tabindex="-1"><a class="header-anchor" href="#_01、单行注释" aria-hidden="true">#</a> 01、单行注释</h3><p>单行注释通常用于解释方法内某单行代码的作用。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">method</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
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router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="注释"><!---->注释<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/basic-grammar/javadoc.html#_01、单行注释" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="01、单行注释"><!---->01、单行注释<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/basic-grammar/javadoc.html#_02、多行注释" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="02、多行注释"><!---->02、多行注释<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/basic-grammar/javadoc.html#_03、文档注释" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="03、文档注释"><!---->03、文档注释<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" 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clickable"><!----><span class="title">2.3 面向对象编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.4 字符串&amp;数组</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.5 集合框架（容器）</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.6 IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.11 并发编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java注释：单行、多行和文档注释</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 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01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2021年10月22日</span><meta property="datePublished" content="2021-10-22T07:22:10.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 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class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/basic-grammar/javadoc.html#_01、单行注释" class="router-link-active router-link-exact-active toc-link level3">01、单行注释</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-grammar/javadoc.html#_02、多行注释" class="router-link-active router-link-exact-active toc-link level3">02、多行注释</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-grammar/javadoc.html#_03、文档注释" class="router-link-active router-link-exact-active toc-link level3">03、文档注释</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-grammar/javadoc.html#_04、文档注释的注意事项" class="router-link-active router-link-exact-active toc-link level3">04、文档注释的注意事项</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-grammar/javadoc.html#_05、注释规约" class="router-link-active router-link-exact-active toc-link level3">05、注释规约</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="java注释-单行、多行和文档注释" tabindex="-1"><a class="header-anchor" href="#java注释-单行、多行和文档注释" aria-hidden="true">#</a> Java注释：单行、多行和文档注释</h1><p>“二哥，Java 中的注释好像真没什么可讲的，我已经提前预习了，不过是单行注释，多行注释，还有文档注释。”三妹的脸上泛着甜甜的笑容，她竟然提前预习了接下来要学习的知识，有一种“士别三日，当刮目相看”的感觉。</p><p>“注释的种类确实不多，但还是挺有意思的，且听哥来给你说道说道。”</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/overview/fourteen-01.png" alt=""></p><h3 id="_01、单行注释" tabindex="-1"><a class="header-anchor" href="#_01、单行注释" aria-hidden="true">#</a> 01、单行注释</h3><p>单行注释通常用于解释方法内某单行代码的作用。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">method</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
     <span class="token keyword">int</span> age <span class="token operator">=</span> <span class="token number">18</span><span class="token punctuation">;</span> <span class="token comment">// age 用于表示年龄</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p><strong>但如果写在行尾的话，其实是不符合阿里巴巴的开发规约的</strong>。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/overview/fourteen-02.png" alt=""></p><p>正确的单行注释如上图中所说，在被注释语句上方另起一行，使用 <code>//</code> 注释。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">method</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
@@ -91,6 +91,6 @@ name 用于表示姓名
 <span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">Test</span> <span class="token punctuation">{</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>4）所有的枚举类型字段必须要有注释，说明每个数据项的用途。</p><p>5）代码修改的同时，注释也要进行相应的修改。</p><p>“好了，三妹，关于 Java 中的注释就先说这么多吧。”转动了一下僵硬的脖子后，我对三妹说。“记住一点，注释是程序固有的一部分。”</p><blockquote><p>第一、注释要能够准确反映设计思想和代码逻辑;第二、注释要能够描述业务含 义，使别的程序员能够迅速了解到代码背后的信息。完全没有注释的大段代码对于阅读者形同 天书，注释是给自己看的，即使隔很长时间，也能清晰理解当时的思路;注释也是给继任者看 的，使其能够快速接替自己的工作。</p></blockquote><hr><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/basic-grammar/javadoc.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/14 上午7:14:28</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/basic-grammar/operator.html" class="nav-link prev" aria-label="运算符"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->运算符</div></a><a href="/basic-extra-meal/48-keywords.html" class="nav-link next" aria-label="关键字"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">关键字<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java运算符</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 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123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 8 分钟</span><meta property="timeRequired" content="PT8M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/basic-grammar/operator.html#_01、算数运算符" class="router-link-active router-link-exact-active toc-link level3">01、算数运算符</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-grammar/operator.html#_02、关系运算符" class="router-link-active 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aria-hidden="true">#</a> Java运算符</h1><p>“二哥，让我盲猜一下哈，运算符是不是指的就是加减乘除啊？”三妹的脸上泛着甜甜的笑容，我想她一定对提出的问题很有自信。</p><p>“是的，三妹。运算符在 Java 中占据着重要的位置，对程序的执行有着很大的帮助。除了常见的加减乘除，还有许多其他类型的运算符，来看下面这张思维导图。”</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/core-grammar/eleven-01.png" alt=""></p><h3 id="_01、算数运算符" tabindex="-1"><a class="header-anchor" href="#_01、算数运算符" aria-hidden="true">#</a> 01、算数运算符</h3><p>算术运算符除了最常见的加减乘除，还有一个取余的运算符，用于得到除法运算后的余数，来串代码感受下。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token doc-comment comment">/**
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clickable"><!----><span class="title">2.1 Java概述</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">2.2 Java基础语法</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/basic-grammar/basic-data-type.html" class="nav-link sidebar-link sidebar-page" aria-label="基本数据类型"><!---->基本数据类型<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-grammar/flow-control.html" class="nav-link sidebar-link sidebar-page" aria-label="流程控制语句"><!---->流程控制语句<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/basic-grammar/operator.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="运算符"><!---->运算符<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a 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class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-extra-meal/java-naming.html" class="nav-link sidebar-link sidebar-page" aria-label="命名规范"><!---->命名规范<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.3 面向对象编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.4 字符串&amp;数组</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.5 集合框架（容器）</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.6 IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.11 并发编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java运算符</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 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aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><meta property="articleSection" content="Java核心"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 8 分钟</span><meta property="timeRequired" content="PT8M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/basic-grammar/operator.html#_01、算数运算符" class="router-link-active router-link-exact-active toc-link level3">01、算数运算符</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-grammar/operator.html#_02、关系运算符" class="router-link-active router-link-exact-active toc-link level3">02、关系运算符</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-grammar/operator.html#_03、位运算符" class="router-link-active router-link-exact-active toc-link level3">03、位运算符</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-grammar/operator.html#_04、逻辑运算符" class="router-link-active router-link-exact-active toc-link level3">04、逻辑运算符</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-grammar/operator.html#_05、赋值运算符" class="router-link-active router-link-exact-active toc-link level3">05、赋值运算符</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/basic-grammar/operator.html#_06、三元运算符" class="router-link-active router-link-exact-active toc-link level3">06、三元运算符</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="java运算符" tabindex="-1"><a class="header-anchor" href="#java运算符" aria-hidden="true">#</a> Java运算符</h1><p>“二哥，让我盲猜一下哈，运算符是不是指的就是加减乘除啊？”三妹的脸上泛着甜甜的笑容，我想她一定对提出的问题很有自信。</p><p>“是的，三妹。运算符在 Java 中占据着重要的位置，对程序的执行有着很大的帮助。除了常见的加减乘除，还有许多其他类型的运算符，来看下面这张思维导图。”</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/core-grammar/eleven-01.png" alt=""></p><h3 id="_01、算数运算符" tabindex="-1"><a class="header-anchor" href="#_01、算数运算符" aria-hidden="true">#</a> 01、算数运算符</h3><p>算术运算符除了最常见的加减乘除，还有一个取余的运算符，用于得到除法运算后的余数，来串代码感受下。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token doc-comment comment">/**
  * 微信搜索「沉默王二」，回复 Java
  */</span>
 <span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">ArithmeticOperator</span> <span class="token punctuation">{</span>
@@ -245,6 +245,6 @@ public class BigIntMulti {
     <span class="token punctuation">}</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>如果 ? 前面的条件为 true，则结果为 : 前的值，否则为 : 后的值。</p><p>“好了，三妹，关于 Java 运算符就先说这么多吧，你是不是已经清楚了？”转动了一下僵硬的脖子后，我对三妹说。</p><p>“差不多，二哥，我需要写点 demo 练习会。”</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/basic-grammar/operator.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/14 上午7:14:28</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/basic-grammar/flow-control.html" class="nav-link prev" aria-label="流程控制语句"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->流程控制语句</div></a><a href="/basic-grammar/javadoc.html" class="nav-link next" aria-label="注释"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">注释<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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diff --git a/dist/cityselect/beijing.html b/dist/cityselect/beijing.html
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class="title">六、求职面试</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">面试题集合</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">背诵版八股文</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">城市选择</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a aria-current="page" href="/cityselect/beijing.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="北京都有哪些牛逼的互联网公司？"><!---->北京都有哪些牛逼的互联网公司？<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" 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class="sidebar-sub-header"><a aria-current="page" href="/cityselect/beijing.html#研究所" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="研究所"><!---->研究所<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/beijing.html#航天科技-航空工业" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="航天科技&amp;航空工业"><!---->航天科技&amp;航空工业<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/beijing.html#工信部下属研究院" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="工信部下属研究院"><!---->工信部下属研究院<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/beijing.html#中科院系列" class="router-link-active router-link-exact-active nav-link sidebar-link heading" 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router-link-exact-active nav-link sidebar-link heading" aria-label="生活方面"><!---->生活方面<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/beijing.html#互联网大厂" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="互联网大厂"><!---->互联网大厂<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/beijing.html#大型外企" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="大型外企"><!---->大型外企<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/beijing.html#生活成本" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="生活成本"><!---->生活成本<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/beijing.html#房价" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="房价"><!---->房价<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/beijing.html#美食" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="美食"><!---->美食<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/beijing.html#教育-医疗" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="教育&amp;医疗"><!---->教育&amp;医疗<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/beijing.html#娱乐" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="娱乐"><!---->娱乐<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li></ul><!--]--></li><li><!--[--><a href="/cityselect/chengdu.html" class="nav-link sidebar-link sidebar-page" aria-label="成都有哪些牛批的互联网公司？"><!---->成都有哪些牛批的互联网公司？<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/guangzhou.html" class="nav-link sidebar-link sidebar-page" aria-label="想去广州了！"><!---->想去广州了！<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/hangzhou.html" class="nav-link sidebar-link sidebar-page" aria-label="杭州有哪些顶级的互联网公司？"><!---->杭州有哪些顶级的互联网公司？<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/nanjing.html" class="nav-link sidebar-link sidebar-page" aria-label="南京有哪些靠谱的互联网公司？"><!---->南京有哪些靠谱的互联网公司？<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/qingdao.html" class="nav-link sidebar-link sidebar-page" aria-label="青岛有牛逼的互联网公司吗？"><!---->青岛有牛逼的互联网公司吗？<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/shenzhen.html" class="nav-link sidebar-link sidebar-page" aria-label="深圳有哪些牛批的互联网公司？"><!---->深圳有哪些牛批的互联网公司？<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/suzhou.html" class="nav-link sidebar-link sidebar-page" aria-label="想搬去苏州生活了。。"><!---->想搬去苏州生活了。。<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/xian.html" class="nav-link sidebar-link sidebar-page" aria-label="西安有哪些不错的互联网公司？"><!---->西安有哪些不错的互联网公司？<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/zhengzhou.html" class="nav-link sidebar-link sidebar-page" aria-label="郑州有哪些不错的互联网公司？"><!---->郑州有哪些不错的互联网公司？<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->北京都有哪些牛逼的互联网公司？</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月27日</span><meta property="datePublished" content="2022-03-27T08:36:50.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category4" role>求职面试</li><meta property="articleSection" content="求职面试"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>城市选择</li></ul><meta property="keywords" content="城市选择"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 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class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/beijing.html#国企-央企" class="router-link-active router-link-exact-active toc-link level2">国企&amp;央企</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/beijing.html#银行软件开发中心" class="router-link-active router-link-exact-active toc-link level3">银行软件开发中心</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/beijing.html#券商" class="router-link-active router-link-exact-active toc-link level3">券商</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/beijing.html#运营商" class="router-link-active router-link-exact-active toc-link level3">运营商</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/beijing.html#研究所" class="router-link-active router-link-exact-active toc-link level2">研究所</a></li><ul 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aria-current="page" href="/cityselect/beijing.html#房价" class="router-link-active router-link-exact-active toc-link level3">房价</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/beijing.html#美食" class="router-link-active router-link-exact-active toc-link level3">美食</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/beijing.html#教育-医疗" class="router-link-active router-link-exact-active toc-link level3">教育&amp;医疗</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/beijing.html#娱乐" class="router-link-active router-link-exact-active toc-link level3">娱乐</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="北京都有哪些牛逼的互联网公司" tabindex="-1"><a class="header-anchor" href="#北京都有哪些牛逼的互联网公司" aria-hidden="true">#</a> 北京都有哪些牛逼的互联网公司？</h1><p>大家好，我是二哥呀，最近读者君哥那梳理完了北京的上百家知名科技公司，强烈要求二哥推荐给大家看看。刚好，二哥公众号后台数据一看，果然还是北京的小伙伴最多，年后大家有跳槽的意愿的话，不妨参考下！ 作为国家的科技中心，北京遍布着各种规模的互联网公司、国企、研究院、银行系，给求职者们提供了非常多的选择机会。</p><p>因为北京适合程序员工作的企业实在太多了，所以怎样给大家介绍北京适合程序员的工作机会一直让我十分头疼。如果写的太简单，我跟大家说北京有百度、腾讯、阿里、美团等等，大家一定觉得我是在废话，但把所有企业一次性全介绍了工作量太大，并且文章也看不出重点了。所以我最终决定，北京拆成三篇来讲，一篇介绍北京的国企央企研究所、一篇介绍北京的大型互联网公司和大型外企、一篇介绍北京的中小型互联网公司。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-68628d58-37ff-44c8-a3f6-6b9f4978f976.jpg" alt=""></p><p>我发现在互联网公司工作的程序员都对国企央企以及研究所十分好奇，但是因为这些单位的信息比较封闭，所以大家对于这些企业的工作方式以及薪酬情况都都不清楚。为了能给北京系列开个好头，第一篇文章我就以我熟悉的北京的国企央企研究所来给大家介绍了。想提前声明一点，虽然我有很多同学和朋友在北京国企央企以及研究所，但是同一个公司，不同的部门或者不同的组差别都太大了。尤其是研究所，每个系列都有数量庞大的下属研究所，并且下属的研究所独立性都特别高，所以风格差别很大。我只能把我见到的情况给大家做一个介绍，具体去到哪个研究所哪个团队还得你们自己去详细打听。只能说我的介绍相对于更接近一些真实。如果大家发现哪里有误，欢迎大家指出。</p><p>下面还是分开来介绍：</p><h2 id="国企-央企" tabindex="-1"><a class="header-anchor" href="#国企-央企" aria-hidden="true">#</a> 国企&amp;央企</h2><p>在这篇文章中说的都是国企和央企的直属软件开发中心，子公司是不包含在里面的。子公司的工作风格差别很大。总体来说，国企和央企在软件技术上都是差互联网公司一大截的，待遇好不好真的看具体公司。是有些好的国企，我一个朋友在某国企虽然工资不太高，但是上了两年没加过班。也有一些国企，加班比拼多多都重，但是工资低且福利差。</p><h3 id="银行软件开发中心" tabindex="-1"><a class="header-anchor" href="#银行软件开发中心" aria-hidden="true">#</a> 银行软件开发中心</h3><p>最近几年计算机相关专业应届毕业生对于银行的软件开发中心热情越来越高，主要是由于银行的软件开发中心比较稳定，薪酬也还可以。目前应届生选择比较多的是工行、农行、中国银行、邮储银行的软件开发中心。大家比较感兴趣就分开详细介绍下吧。银行软件开发中心在校招时和互联网公司不太一样，hr 只会和你说一个大概的工资，hr 说的工资只能参考，工资还是以实际发放为准。如果想知道具体工资你得私下去问和你关系好的学长学姐，或者只能等工资发下来了才能知道。另外银行软件开发中心的稳定也只是说轻易不会开除你，但是忙不忙就要看你运气了。银行软件开发中心有的组忙起来完全不虚 PDD。</p><h4 id="工商银行软件开发中心" tabindex="-1"><a class="header-anchor" href="#工商银行软件开发中心" aria-hidden="true">#</a> 工商银行软件开发中心</h4><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-b8653934-cc7f-4703-81f2-f654f7d4440a.png" alt=""></p><p>和同行相比，工商银行的软件开发中心算技术最好的了。工行喜欢招应届生，社招进来的比较少。刚进来的应届生职级是助理经理，税前年薪差不多是20万左右（到手15-16万吧，加上年终奖和节假日补贴）。工资发放方式稍微有点奇怪，就是每月发八九千，然后留一部分年底一并发放。每月会有饭补，过节也会有节假日补贴（放三天的节日假期给 1000，国庆给 2000，过年 4000）。这个职级的工资对于在北京工作来说还是有点难顶的，毕竟光跟人合租每月就要画掉两千多了。如果你是本科毕业进入工行，从助理经理升到经理一需要两年时间，硕士只需要一年，这个职级基本上全都能按时达到，不过工资变化不太大。从经理一升到经理二大约要一到两年的时间，这就看你能力了，经理二以后工资就相对多一些了，经理二绩效不太好的话每年到手能拿 22 万左右，如果绩效好，可能能拿到 29 万左右。经理二升经理三就完全看你自己能力了，到经理三以后每年到手都能 35 万左右，收入就很可观了。另外在工行发专利什么的也有些奖金，一个专利貌似是奖励 5000.</p><p>工行的总行是在珠海。工行在西安、杭州等地也设立了研发中心，都是属于总行。目前北京这边也一直在动员员工去西安，薪资和北京差不太多。听说西安那边的工行加班比较严重。北京这边总体还好，卷不卷看你组长了，不过你也可以不甩你领导，他们是很难开掉你的，他们能的只是绩效给你打低点，你工资少点。</p><h4 id="农业银行软件开发中心" tabindex="-1"><a class="header-anchor" href="#农业银行软件开发中心" aria-hidden="true">#</a> 农业银行软件开发中心</h4><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-fb046afd-1116-4619-a5ae-d9756863ca19.png" alt=""></p><p>感觉农业银行的软件开发中心技术比工行差一点，不过工资比工行多一些，刚毕业的应届生税前能到税前25万-32万（这是hr说的啊，我了解到的西安每月税后到手是 1万2，加上年终奖税前能算 20 万的年包，北京比西安稍微多一点点，但是多不了太多）。农行软件开发中心有个大问题就是工资分配很平均，但是工作量分布不均，有的组十分养生，有的组忙的受不了（越接近客户用的产品线越累）。我的一个学长天天早早就下班了，另外一个同学周末跟我吃个饭都急匆匆的，为了投产要加班到凌晨。目前农行内部的怨气比较大，这点大家在脉脉上也能看出来。农行想要升职还要去考软考。</p><h4 id="中国银行软件开发中心" tabindex="-1"><a class="header-anchor" href="#中国银行软件开发中心" aria-hidden="true">#</a> 中国银行软件开发中心</h4><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-e3490a86-2b92-4a47-8c68-8e2281c2cb32.png" alt=""></p><p>中国银行软件开发中心算是给钱最少的了，年包15万左右。这钱在北京确实太少了。不过工作是目前几个银行软开里最轻松的，家里不怎么缺钱，只想找个轻松稳定的可以选。</p><h4 id="邮政储蓄银行软件研发中心" tabindex="-1"><a class="header-anchor" href="#邮政储蓄银行软件研发中心" aria-hidden="true">#</a> 邮政储蓄银行软件研发中心</h4><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-4e15e06c-f808-4d79-954f-3fbca94ce6e6.png" alt=""></p><p>第一年包含试用期，年薪税前总包 26w, 第二年年薪税前总包 31w。加不加班看你运气了，运气好被分到好的组不怎么加班，运气不好就很惨了。在北京工作的话不会被外调，但是在西安等地工作的许多人会被外调。</p><h3 id="券商" tabindex="-1"><a class="header-anchor" href="#券商" aria-hidden="true">#</a> 券商</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-58cd1949-b992-4550-b2e1-b24c519c0a78.png" alt=""></p><p>曾经农行软开的一位领导来我们学校校招宣讲时就说因为银行的工资有限制，涨薪比较慢。所以很多银行软开的职工干几年后就会跑到券商去挣钱。那时我才知道券商居然还招不少程序员。后来我发现中信建投证券是真不错，北京这边校招生进来月薪 18k ，年终奖 6 个月，虽然薪资还是不及互联网公司，但是涨薪速度相比于其它国企央企还是快很多的。另外只有股票开市的日子用上班，加班很少。不过对于学历的要求比较高，必须是985硕士，并且还卡本科。</p><p>对于其它券商的情况我知道的就不多了，这里给大家提供一个找工作的思路，大家可以多去了解下。</p><h3 id="运营商" tabindex="-1"><a class="header-anchor" href="#运营商" aria-hidden="true">#</a> 运营商</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-1b67f498-dc2e-401f-b942-59455b941bd9.png" alt=""></p><p>这里说的运营商说的是移动联通还有电信的研究院。移动的工资发放风格和工行有异曲同工之妙，每个月发的工资很少，到年终会一起再发一些。应届生年薪大概 20w 左右，平时工资发一半，年终把剩下的一半发给你。联通在北京的研究院有两个，一个叫联通研究院，一个叫联通软件研究院。我听说的是联通研究院比较好，联通软件研究院比较坑。 电信研究院的据说很轻松，但是工资低，没朋友在这里，我不太确定，只是听说。</p><h2 id="研究所" tabindex="-1"><a class="header-anchor" href="#研究所" aria-hidden="true">#</a> 研究所</h2><p>北京有着数量庞大的研究所，比如航天科技系列、航空工业系列、中船舶系列、中科院系列、中电科系列、军事科学院下属系列、工信部下属研究院、中国兵器等等。不得不说计算机相关专业真的是万金油，因为上述研究所，不管他们主营业务是啥，他们全都招计算机相关专业的毕业生，并且招的还不少。</p><p>近几年想成为这些研究所的正式职工都需要是硕士以上了，签的本科生基本都是劳务派遣。户口的事放在生活里统一说。</p><p>可能家里的长辈听到你去了研究所会觉得很有面子。但是单论软件技术来说，目前研究所是落后于互联网公司的，并且差距还不算小。研究所和互联网公司的办事风格不太一样，互联网公司会把岗位划分的很细致甚至有的互联网公司会无限的细分一个岗位（这点是我觉得不太好的地方，因为划分的太细了，以后跳槽会存在问题），但是研究所的岗位又划分的太粗糙了（从订需求、写开发文档、代码开发、测试、到和客户扯皮这些流程全的你来搞）。另外因为研究所的大部分领导软件方面技术没有互联网那么专，所以对工作量的评估不是太准，有时候安排起活来就比较离谱。是否来研究所要想想明白以下几个问题：（1）你家庭的经济情况，至少北京买房首付家里能掏出来。（2）你的兴趣（如果只想安安静静的写代码，研究所不太合适）。（3）面试通过后你要充分的了解你所在的团队情况，同一个研究所，不同的团队的差别那可大了去了。</p><p>总体来说，个人感觉如果你在一个二线城市的研究所工作会比在一线城市研究所工作舒服。在一线城市去互联网公司干几年攒点钱撤一个二线城市压力没那么大。在北京的研究所工作北京户口是拿了，但是干几年根本攒不下多少钱，一线城市研究所分房这事就不用做梦了，充其量会给你提供一个宿舍，这种宿舍也就是毕业三到五年内可以住，以后就不能住了。相比于二线城市的研究所，一线城市研究所的工资每月多个两三千，但是房价是二线城市的三到五倍，生活幸福感会大打折扣。</p><h3 id="航天科技-航空工业" tabindex="-1"><a class="header-anchor" href="#航天科技-航空工业" aria-hidden="true">#</a> 航天科技&amp;航空工业</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-fcff3f6d-6357-48fe-a807-74c225ce0c95.png" alt=""></p><p>我有很多的校友都在航空航天系列的研究所。研究所的具体薪资都比较保密，大部分研究所在给你 offer 的时候不会像互联网公司那样把薪资给你说的清清楚楚并且写在合同上，而是大概和你说个数。而且你入职后两到三个月的薪资往往都很少，等三四个月以后薪资稳定了你才能确定你开多少钱。</p><p>航空航天目前效益比较好，算是研究所中薪资比较高的。另外食堂和宿舍都有，如果没宿舍还会有租房补贴。但是挣钱和互联网公司肯定没法比。薪资的话刚毕业的学生每月到手大概是一万出头，工资加上各种补贴年薪差不多税前能到20多万。加班没有加班费，出差会有出差补贴，有的团队出差一天补300，有的团队出差一天补400。所以如果你一个月都驻在外面的话，一个月工资到手也两万多呢。但是一年有个一两月出差还行，有的项目组一年有三分之二时间在外面出差，你会怀疑人生的。其实刚毕业头两年航空航天的薪资和互联网公司差距不大，不过在两三年后薪资水平就会逐渐拉开，研究所薪资涨的都慢。</p><p>另外航空航天的研究所是很忙的，所以别想着进来轻松。研究所的忙法和互联网公司不是一种忙法，有的人在工作强度大的互联网公司待过的可能觉得自己 996 和 007 都能抗，来个研究所还怕啥？我是想说你可能想的有点简单了，在研究所写代码只是工作的一小部分，让你烦心的事多着呢。只是说你如果不把领导打了的话，他不太容易把你开掉。另外研究所有个好处是比较支持在职读博，如果你的组不是太忙，提升下学历是个不错的选择。</p><h3 id="工信部下属研究院" tabindex="-1"><a class="header-anchor" href="#工信部下属研究院" aria-hidden="true">#</a> 工信部下属研究院</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-0f3b7783-4567-4f07-974d-a31b8d9ec939.png" alt=""></p><p>工信部下属的研究院整体上都不错，就比如信通院（中国信息通信研究院），如果你对这个单位陌生的话你可以看看你的行程码下面服务提供商排在第一个的是谁。信通院是制定标准的单位，也是监理单位。在信通院的话代码就很少写了，更多就是写文档了，不过信通院这种地方的视野肯定高一些。薪资的话信通院每个职工薪资差别很大，刚进去工资很低，可能就四五千块钱，但是薪资每个月都会变化，然后稳定在一个数。薪资低的每月到手有一万出头，但我知道每月到手两三万甚至更多的也是有的（不是领导啊，只是职工）。</p><h3 id="中科院系列" tabindex="-1"><a class="header-anchor" href="#中科院系列" aria-hidden="true">#</a> 中科院系列</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-96c5f7a6-b13b-4153-9c7f-7c4617dbddca.png" alt=""></p><p>中科院系列下计算机相关最强的三个所就是自动化所（搞 nlp 的应该都听过宗成庆老师）、软件所、计算所。另外还有信工所、电子所也还凑合。整体待遇上，中科院系列的待遇不如航空航天系列的。你可以把中科院系列的研究所完全的想象成一个大学（嗯，不用想象，确实是个大学，中国科学院大学嘛）。每个团队就是你们研究生的实验室。基本上就是一个大老板，带几个小老板，再带几个职工，另外再配几个中科院的学生。课题组想要挣钱也是需要大老板出去拉活，然后小老板带着学生去干活。工作方式和技术水平和你们研究生的实验室一模一样的，就是多了一些硕士博士职工罢了。</p><p>中科院系列各个所和各个课题组的待遇以及工作方式差距特别大，工资有少量的比较高的（我说的比较高是能和互联网公司持平），大部分刚进来的硕士应届生工资差不多就是八九千，博士一万多点。有的所提供宿舍，有的所连宿舍都没。总体上来说想在中科院有好的发展，需要你是博士，然后多发论文。等你成为小老板后，且团队可以项目成果转化，或者孵化企业后你的待遇会有比较大的变化。</p><h3 id="中电科系列" tabindex="-1"><a class="header-anchor" href="#中电科系列" aria-hidden="true">#</a> 中电科系列</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-a4804493-fdb0-48ea-b9f5-82ad9a3d3d08.png" alt=""></p><p>中电科系列的待遇比航空航天系列稍差，比中科院系列稍强一些。我感觉中电科系列的加班强度比较高，认识的几个在中电科系列的经常 996 甚至 007，还经常出差。待遇的话基本工资也是每月1万出头，然后出差也是有出差补贴，每天300 或者400，具体要看团队。感觉工资主要是靠出差补贴堆起来的。大部分下属院所会提供职工宿舍，中电科系列下属研究所风格差别很大，好起来是真好，坑起来是真坑啊。</p><h3 id="中国兵器系列" tabindex="-1"><a class="header-anchor" href="#中国兵器系列" aria-hidden="true">#</a> 中国兵器系列</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-db583262-a5d4-4137-88e1-90f0127ba755.png" alt=""></p><p>中国兵器系列计算机相关专业招的不是太多，其实每年一共招的人也不多。我最初对中国兵器系列的研究所有了解是一个所来我们学校宣讲。感觉中国兵器在西安的几个所能算的上是西安研究所的天花板了吧，待遇还不错（和航天504所比我有点不太确定）但是在北京我就不太清楚了。</p><h3 id="军事科学院系列" tabindex="-1"><a class="header-anchor" href="#军事科学院系列" aria-hidden="true">#</a> 军事科学院系列</h3><p>军事科学院系列的研究所招的职位都是军队文职，也就是说都需要考试的。我上时，听过几家军事科学院下属单位来宣讲，只是有个粗略的了解。军队文职也是上班制的，上班时也是需要穿军装的，下班后的生活不干预。工资有个很详细的职称对应表，硕士进去我记得是一万出头。想有好的发展最好去抓总单位，因为上面提的很多研究所想要项目都得抓总单位批。不过抓总单位的科研岗都要博士了，硕士进去只能是支撑岗位。</p><p>北京来我们学校宣讲的几家军科院下属研究所都是承诺户口以及包解决子女上学问题的。当时说的是博士进去副营级，会提供一个四十平左右的房子住。硕士就是普通两人一间的宿舍。</p><h2 id="生活方面" tabindex="-1"><a class="header-anchor" href="#生活方面" aria-hidden="true">#</a> 生活方面</h2><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-799a0d1a-7782-4e3c-8a36-4c495cd94ae5.png" alt=""></p><p>北京具体的房价、美食教育等情况我放到下一篇讲北京互联网公司的文章中好好去讲下。这篇文章只讲一个事，那就是<strong>北京户口</strong>。北京户口的主要用处就是子女教育问题，其它的一些好处就是有北京户口可以申请共有产权房还有摇车牌等。应届毕业生是最好搞定户口的时候了，如果你能进这篇文章中讲的这些单位，大概率你是有户口的。不过拿户口的同时都要签一个五年的服务期合同，违约金每个单位不一样， 20万-50万不等，逐年递减。对于应届生来说户口貌似吸引力没有特别的大，毕竟现在自己还顾不过来，也不知道自己子女在哪呢。但是对于已经有子女的人来说，我一提给北京户口的事他们眼睛就亮了。</p><p>北京这些年对于户口有也逐渐放宽，一些互联网公司的特殊应届招聘计划也会给户口，另外今年双一流学科的硕士以上应届毕业生都给户口了。</p><p>另外想要户口还可以走积分落户，不过想要靠积分落户解决北京户口，就需要你头上有犄角，身后有尾巴了。</p><p>好啦，这篇文章就介绍这么多，期待下一篇北京有哪些大型互联网公司和外企吧！</p><h3 id="互联网大厂" tabindex="-1"><a class="header-anchor" href="#互联网大厂" aria-hidden="true">#</a> 互联网大厂</h3><p>谈到互联网公司，免不了说薪资。很多应届生校招时由于没有工作经验，容易被哄。首先要知道，校招给你开出的薪资是可以 argue 的，也就是说可以和 hr 商量。然后我主要想说的是，要谈你去和 HR 谈 <strong>base</strong>（每月基础工资）, 可不敢去和 hr argue 每年多少薪哈。一个哥们给我讲了个真事，他们公司一个应届生嫌 25k x 15 少，HR 跟他说那给你 25k X 16 吧，然后那个应届生就开心的答应了。HR 给你承诺的每月 base 是没问题的，但是说每年发多少个月的月薪只是一个期望，最终给你发几个月的年终奖要根据你到年底的评分以及你所在团队年底的评分共同决定。</p><p>下面我说的各个公司薪资时说的每年多少薪也是 HR 说的一个期望薪资呀！许多说发 4 个月年终奖的，实际上一半人拿不到。</p><h4 id="百度" tabindex="-1"><a class="header-anchor" href="#百度" aria-hidden="true">#</a> 百度</h4><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-7d1367ae-04c1-4162-aed8-2a99203a623d.jpg" alt=""></p><p>坐标：西北旺</p><p>2022校招薪资：开发岗白菜价 22k，sp 24k，ssp 26k 。算法岗白菜价 26k，sp 29k，ssp 32k。每年 16 薪。</p><p>个人评价：曾经十分强大的百度这几年逐渐和腾讯阿里拉开了差距。不过就我个人而言还是比较喜欢百度的。首先百度是以技术为导向的，这一点作为程序员应该会有比较好的体验，另外百度总体来说加班不是特别严重。工作制差不多 975 或者是 985, 前两周我趁着去找在百度的同学玩的机会，周六下午三点左右在百度大楼里转了一圈，最起码周末是没几个工位上有人的。工位上有人的看样子也是趁周末想自己单独学习会。另外百度的办公环境还不错，食堂也很好。百度在北京的部门以及岗位都特别齐全，只是大量的开发岗位用 php 有点难顶。</p><p>百度这两年集中发展人工智能，这一点在给校招开出的薪资上也能看得出来。不得不说这两年校招的薪资是真高呀，就不用说算法岗校招的薪资，开发岗校招的薪资都倒挂了不少老员工。百度在算法上投入的决心是挺大的，自己能搞出深度学习框架 PaddlePaddle 十分让我敬佩。读研时实验室显卡不够我还经常上百度的 AI Studio 平台上薅羊毛，有次顺手打了个比赛得了个名次，排名不高，但百度还真给我寄来几百块钱的购物券。只是最近百度无人车进展的不太顺利，感觉是百度人工只能发展的一大挫折了。</p><h4 id="腾讯" tabindex="-1"><a class="header-anchor" href="#腾讯" aria-hidden="true">#</a> 腾讯</h4><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-7d6cd775-8895-447a-a348-27443594bdcd.jpg" alt=""></p><p>坐标：西北旺</p><p>2022校招薪资：19-25k，每年 16 薪；每月 4k 租房补贴；6-10 w的签字费分两年发放。</p><p>个人评价：北京这边腾讯和百度的办公楼离得很近，腾讯在北京这边的部门主要是 PCG 事业群（PCG 中都是腾讯和媒体宣传相关的部门，包含腾讯视频、腾讯新闻、腾讯QQ等，另外央视频也是包给北京这边的腾讯做的。话说PCG 在脉脉上被喷的很惨）。腾讯主要用的语言是 C++ 和 Go，我见过一个部门招 Java 的，不过一方面是招的人数太少，一方面在腾讯做 Java 总觉得有点怪怪的。介绍百度时说的百度是以技术为导向的是说给腾讯听的，因为腾讯是以产品为导向的。产品的话语权比程序员大。</p><p>腾讯的福利是特别香的，食堂也很好。特别今年把租房补贴涨到了4k。那肯定有鹅选鹅呀。</p><p>近期搜狗也并入腾讯了，并到了腾讯的 Pcg 事业群下，目前各方面已经和腾讯对齐了。我有个同学先在腾讯的 PCG 实习，然后校招最终选择了去搜狗，结果又被并回 PCG 了，也是特别的缘分。上面的图就是我在搜狗茶水间拍到的照片~可以看到已经都换成腾讯 logo 了。搜狗不在西北旺，搜狗在五道口附近呀。</p><h4 id="阿里巴巴" tabindex="-1"><a class="header-anchor" href="#阿里巴巴" aria-hidden="true">#</a> 阿里巴巴</h4><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-996bbbca-dd9c-4108-b796-46f29dd840e9.jpg" alt=""></p><p>坐标：望京</p><p>2022校招薪资：开发岗白菜价 21-24k，sp 25-28k，ssp 29-30k。算法岗白菜价 25k，sp 29-31k，ssp 33-36k。每年 16 薪，签字费 1-10w，还会额外发 6k 的搬家费。</p><p>个人评价：北京的阿里巴巴大楼在望京。另外目前阿里巴巴的北京总部也在建设中，预计2023年投入使用。阿里巴巴近两年一直有负面消息，我个人而言也不太喜欢阿里的狼性文化。但是有一说一，阿里的技术在国内的互联网是数一数二的。从阿里出来的职工跳槽的认可度绝对是很高的。不过还是求求你们别卷啦！</p><h4 id="字节跳动" tabindex="-1"><a class="header-anchor" href="#字节跳动" aria-hidden="true">#</a> 字节跳动</h4><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-fd757b6c-154c-4aa6-95a8-467d6a9a83b4.jpg" alt=""></p><p>坐标：中航广场</p><p>2022校招薪资：开发岗白菜价22-24k，sp 26-28k，ssp 30-33k。算法岗白菜价26-29k，sp 30-32k，ssp 35k。每年15薪，还有1w-12w的签字费，我看大部分是 1w！住在 30分钟内可以到达公司的地方额外会有 1500 的租房补贴。</p><p>个人评价：目前字节慢慢的把 BAT 中的 B 换成了 ByteDance 的 B，字节目前技术的认可度是很高的。我的一位学长 18 年时纠结去京东还是去字节（18年时我听字节跳动这个名字还有些许陌生），最终去了字节。然后他现在的薪资已经让我十分惊叹了。字节跳动的福利待遇也特别好，最近因为业务影响裁应届生虽然是无奈之举，不过或多或少对公司有点影响。字节最近在西安设立了研发中心，另外听说在青岛开了一个元宇宙研发中心，工作地点在市北，校招招人，感兴趣的可以去看看。</p><h4 id="美团" tabindex="-1"><a class="header-anchor" href="#美团" aria-hidden="true">#</a> 美团</h4><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-809a1c71-7a8f-43c8-ad4b-befab2fe5cf2.jpg" alt=""></p><p>坐标：望京</p><p>2022校招薪资：开发岗白菜价21k，sp 24k，ssp 27-29k。算法岗白菜价 24k，sp 27k，ssp30-32k。每年15.5薪。其余的福利也就是每天 30 饭补和 9 点以后打车了。</p><p>个人评价：美团的技术绝对没得说，特别是对于应届生有不错的培养，美团的学城上有很多质量很高的技术资料，许多从美团离职的员工都想念美团的学城。另外给的薪资从去年薪资大涨后也算不错了。虽然今年校招比去年没怎么涨，只是在 ssp 的薪资上做了一些调整，但是凭良心讲，一个应届生这个价确实不低了。不过美团的办公环境和福利就太差劲了，首先美团的办公大楼都是租的，工位也都很简陋，也没食堂。别的公司过节发礼品，好家伙，你团发个贺卡，要么发个微信的红包专属封皮...</p><h4 id="京东" tabindex="-1"><a class="header-anchor" href="#京东" aria-hidden="true">#</a> 京东</h4><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-e08e1eef-6561-4057-a12e-3a1183fb9ae1.png" alt=""></p><p>坐标：亦庄</p><p>2022校招薪资: 开发岗白菜价 19.5-23k，sp 25-26.5k，ssp 29k。算法岗白菜价 27.5k，sp 31-33.5k，ssp 36.5k。每年 15 薪。</p><p>个人评价：首先说坐标哦，京东在亦庄，租房会相对便宜一些，省到就是赚到。然后说薪资，京东有个不太好的地方就是薪资的 20% 是绩效，虽然绩效一般都能拿满，但是这部分绩效就不用交住房公积金了呀。京东周末很少加班，周内大部分 8 点左右下班的样子。</p><h4 id="网易" tabindex="-1"><a class="header-anchor" href="#网易" aria-hidden="true">#</a> 网易</h4><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-fc7b1b08-0363-4af6-adc2-e6185c55bb9c.png" alt=""></p><p>坐标:西北旺</p><p>2022校招薪资:北京这边网易的薪资划分的不太明确，我看开发爆料出的月薪从 18.4k、22k、24k、25.5k的都有。算法爆出的月薪 25.5k，27.5k, 30k的都有。每年 15 薪。</p><p>个人评价:北京这边基本上都是网易有道团队的，今年薪资给的不太行呀，不过我百度的朋友和我说他每次晚上看网易大楼的灯总是关的最早的（西北旺聚集的几家公司在楼上可以互相看到对方）</p><h3 id="大型外企" tabindex="-1"><a class="header-anchor" href="#大型外企" aria-hidden="true">#</a> 大型外企</h3><p>外企的 wlb（工作生活平衡）一直是大家十分喜欢的，不过近几年由于国内互联网大厂给的实在太多了。同样的水平国内互联网给的薪资大概会比外企多50%左右。另外一些同学也会担心在外企待几年后工作和技术适应不了国内的强度。所以许多 offer 收割机拿到许多大厂 offer 和大型外企 offer 后也会犹豫该去哪。</p><p>许多人会问面外企是否需要用英文面试？我问了几位在外企的老哥，共同的说法是要看你面的组和职级。有的组是频繁和国外开会交流的，这自然需要你英语好，但是如果你面的组和国外开会少，那么就不需要你英语好。另外看你面的职级是否比较高，如果职级高，和国外交流的事自然少不了。但是如果你只是组长给你布置活你干的话，也不需要你英语好。</p><h4 id="hulu" tabindex="-1"><a class="header-anchor" href="#hulu" aria-hidden="true">#</a> Hulu</h4><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-483d5154-671c-4ef4-844c-3240f34b6008.png" alt=""></p><p>坐标：望京</p><p>2022校招薪资：Hulu 招人的量不大，所以爆料薪资的人不多。有限的几个爆料的年包都在 50w 以上。</p><p>个人评价：可能做开发的同学没听说过这个公司，不过做算法的同学应该知道这家公司的很多，这家公司出了一本挺不错的书籍叫《百面机器学习》。有许多同学应该在准备算法面试时看过这本书。Hulu 是美国的一个比较热的视频网站。严格的来说 Hulu 应该算是一家小而美的公司，不能算大型企业。但是因为 Hulu 工资不错，技术很好，另外也不加班。所以 Hulu 的 offer 比许多大型企业的 offer 还有诱惑力。</p><h4 id="微软" tabindex="-1"><a class="header-anchor" href="#微软" aria-hidden="true">#</a> 微软</h4><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-e0dbb967-2bb3-453f-8384-02c1c0aa61a0.png" alt=""></p><p>坐标：离五道口也不远。</p><p>个人评价：微软的薪资情况和面试考察重点等在介绍苏州时已经详细介绍过了，就不在重复介绍了，大家感兴趣的可以看<a href="https://mp.weixin.qq.com/s/rM5ZpId7O2OBzFb5sHcjeA" target="_blank" rel="noopener noreferrer">这里<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>。不过相比在微软苏州工作而言，在北京的房价和消费情况水平下，微软北京的薪资就不算太香了。什么？给我 offer 我去不去? 马上去！ 微软北京前些年的落户指标比较多，不过近几年微软的落户指标相对少一些了。</p><h4 id="shoppe-虾皮" tabindex="-1"><a class="header-anchor" href="#shoppe-虾皮" aria-hidden="true">#</a> Shoppe（虾皮）</h4><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-ea99812c-fdb6-44a6-bc55-79c15ad37a3a.jpg" alt=""></p><p>坐标：五道口附近，和搜狗挨着。那片有好多互联网公司。</p><p>2022校招薪资：白菜价 22k，sp 25k，ssp 27k。有3万签字费，以及12万股票分三年发放。</p><p>个人评价：你可以把虾皮想象成东南亚的淘宝。我还是比较喜欢虾皮的，薪资很高，技术也不错。但是网传的 965 是没几个组能达到的，虾皮说是外企其实和国内互联网公司风格差不太多。近几年虾皮也越来越卷了。虾皮周六应该是不用加班，前两周周六我和我同学去转了一圈，大门是锁着的。听说周内 7 点到 10 点下班的组都有。</p><h4 id="amazon" tabindex="-1"><a class="header-anchor" href="#amazon" aria-hidden="true">#</a> Amazon</h4><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-9a9d93ca-89fa-4b67-a491-d085eb2601d3.png" alt=""></p><p>坐标：朝阳区远洋国际中心</p><p>2022校招薪资：亚马逊的基础年薪我看到有30w和34.9w 两个档，配给员工的股票也有 23w 和 27w 两个档（第一年发5%，第二年发15%，第三年和第四年都是发40%），签字费第一年会给9.5w的签字费，第二年还会给6.9w的签字费。</p><p>个人评价：最近几年外企不如国内互联网大厂开出的薪资高，但是外企的养生一直是大家十分喜欢的。亚马逊在外企中算是比较抠的，不过因为近几年亚马逊股票涨的多，所以给了员工股票后员工还是大赚。另外有个缺点就是亚马逊在国内的业务相对比较边缘，但是亚马逊的光环很耀眼，员工出来还是很受欢迎的。</p><h4 id="apple" tabindex="-1"><a class="header-anchor" href="#apple" aria-hidden="true">#</a> Apple</h4><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-ba5e8a95-1cf8-42f9-aacc-3573cd93f19f.png" alt=""></p><p>坐标：朝阳区建国门外大街国贸大厦</p><p>个人评价：苹果的保密相当的严格，我也没有关系好的在苹果上班的朋友，所以我也没找到苹果今年校招的薪资是多少。苹果北京的业务比较边缘，岗位基本都是做功能本土化的工作。工作时间是去掉午休后满 8 小时就可以。</p><h4 id="airbnb" tabindex="-1"><a class="header-anchor" href="#airbnb" aria-hidden="true">#</a> Airbnb</h4><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-b9d6ef38-e7c1-4e00-8409-2f63489a5d6c.png" alt=""></p><p>坐标:朝阳区环球金融中心</p><p>2022校招薪资：基础年薪35w，额外基础薪资 15% 的奖金，8w 美元股票分 4 年发放。</p><p>个人评价：爱彼迎优势是 wlb（工作生活平衡），且薪资也很不错，这个股票太有诱惑力了。 当然缺点也是有的，这里引用脉脉上一个 Airbnb 职工的匿名评论“Airbnb单纯做项目基本学不到啥技术 、框架封装的太完善且都是业务。自学能力强的话可以来，如果想单纯靠做项目提升能力就需要慎重了”。我感觉这个挺适合我的哦~ 上班干活，六点下班再写写文章，完美。</p><p>好了，详细介绍的就这么多了。另外谷歌由于在国内招的人十分的少，我也没有在谷歌上班的大神朋友，所以谷歌的信息我就不知道了。Paypal 我找到的信息也有点少，也不展开介绍了，貌似 PayPal 在上海部门比较齐全，北京这边工作地点我最初都没搜到，还是根据朋友圈一个朋友提醒在 boss 上找到的，在朝阳区金地中心。</p><h2 id="生活成本" tabindex="-1"><a class="header-anchor" href="#生活成本" aria-hidden="true">#</a> 生活成本</h2><p>在北京的生活就仁者见仁智者见智了，有的人喜欢他的繁华与机遇，有的人讨厌他的拥挤与压力。</p><h3 id="房价" tabindex="-1"><a class="header-anchor" href="#房价" aria-hidden="true">#</a> 房价</h3><p>买房的事往后稍稍，咱们先说租房的事。注意啊，我下面说的上班方便基本上就是出门后一个小时内到公司呀！来了北京后大概率事要和人合租了，像上面说的在腾讯百度等西二旗这片区域上班的，大多数选择在回龙观这块和人合租，相对便宜且有地铁站上班比较方便。在回龙观这块租一个 10 来平的卧室大约 2500 左右吧。 在五道口那片上班和望京那片上班的在附近租房要更贵点，租一个 10 来平的卧室大概每月要花 3000+。当然在望京上班可以沿着14号线租的远点，租金会便宜点，上班直接坐着地铁过来也还挺方便。在亦庄那边上班的租房会相对便宜点，2000多点基本可以。想要一个住且在上述公司上班方便，租一个30平左右的一居室基本最低每月都要 5000 以上了。</p><p>另外大家还可以瞅着点公租房，租金会比较便宜，单租一间 40 平的房子也就不到 3000，只是限制会比较多。部分公司会有公租房名额，我记得度小满就能协助职工申请公租房。申请一居室的会容易点，两居室的难申请。</p><p>下面就说买房的事了，算了，我对北京买房的事也没什么见解。贴个图你们自己看吧，数据不一定准，就感受下房价有多高吧....密云延庆什么的就太远了，当然有很多人在北京上班在天津买房或者廊坊买房的。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-e5bc2cf6-647d-43f9-9352-934440d71b16.png" alt=""></p><h3 id="美食" tabindex="-1"><a class="header-anchor" href="#美食" aria-hidden="true">#</a> 美食</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-148db131-6c78-4cbf-86a0-465d88fdd217.png" alt=""></p><p>有一句话叫“京城无美食”。虽然这句话有点极端但是也有点道理的。美食的聚集地大部分是沿山沿海沿河沿江的地方，北京一直不是一个美食原料富足的地方。北京常说的北京名菜特点不像鲁菜川菜江苏菜那样特点鲜明。我能想到的北京特色的饭也就是烤鸭、涮羊肉、爆肚、炒肝、京酱肉丝、炸酱面，除了这些还真不太好想了。在北京有个好处是你能在这里吃到全国各地的美食，因为北京全国各地甚至世界各地的人都有，所以各省各国风味的餐厅都会有，但是感觉风味上还是根据北京这边的口味做了一些改变。</p><p>抛开美食说一个现实的问题，就是吃饭的花销。你在学校时一顿饭也就是十块左右。来到北京后吃饭的花销基本上要比你学校的花销贵一倍左右（因为老板的房租也会摊到饭的价格中）。如果你公司有食堂还好，要是公司没食堂只能吃外卖的话，自己的腰包和胃都受不了。说到这我觉得我以后晚饭还是自己做吧。</p><h3 id="教育-医疗" tabindex="-1"><a class="header-anchor" href="#教育-医疗" aria-hidden="true">#</a> 教育&amp;医疗</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-dc5e04dd-8a49-45b2-b96d-e1a17a2405f2.png" alt=""></p><p>北京的教育和医疗肯定全国顶级了。再往详细的介绍我觉得我写不出什么有深度的东西了，对于教育和医疗来说，我觉得我这个刚毕业不到一年的人肯定不如在北京待了多年的并且有孩子的了解的多。我只是知道虽然北京的高考会比其它省份容易很多，但北京一贯实行的素质教育对于孩子家长来说会很累，今天陪孩子学个交谊舞，明天学个马术，后天学校开个家长联谊会。对于 996 或者 995 的程序员家长来说真的有点难顶，不像我们上学时很少叫家长了。</p><h3 id="娱乐" tabindex="-1"><a class="header-anchor" href="#娱乐" aria-hidden="true">#</a> 娱乐</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-58c387f7-575f-4c2f-9702-e62d7b7575dc.png" alt=""></p><p>北京值得去的玩的地方很多的，圆明园、颐和园、故宫、香山、各种胡同、各种博物馆、各种茶馆。听个相声、听个演唱会，看个体育比赛都是不错的休闲方式。去各种商场转一转买点东西也是休闲。当然因为北京这么大所以周末出来玩一趟会特别花时间。北京的国家级景区票价是比较便宜的，我记得颐和园门票也就四五十，不像其它地区的景区动辄好几百的门票。</p><blockquote><p>作者：朱晋君，转载链接：<a href="https://mp.weixin.qq.com/s/xlPZfpd89rDq6L-Me80wnw" target="_blank" rel="noopener noreferrer">https://mp.weixin.qq.com/s/xlPZfpd89rDq6L-Me80wnw<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in 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class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="中国兵器系列"><!---->中国兵器系列<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/beijing.html#军事科学院系列" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="军事科学院系列"><!---->军事科学院系列<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/beijing.html#生活方面" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="生活方面"><!---->生活方面<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/beijing.html#互联网大厂" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="互联网大厂"><!---->互联网大厂<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/beijing.html#大型外企" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="大型外企"><!---->大型外企<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/beijing.html#生活成本" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="生活成本"><!---->生活成本<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/beijing.html#房价" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="房价"><!---->房价<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/beijing.html#美食" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="美食"><!---->美食<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/beijing.html#教育-医疗" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="教育&amp;医疗"><!---->教育&amp;医疗<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/beijing.html#娱乐" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="娱乐"><!---->娱乐<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li></ul><!--]--></li><li><!--[--><a href="/cityselect/chengdu.html" class="nav-link sidebar-link sidebar-page" aria-label="成都"><!---->成都<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/guangzhou.html" class="nav-link sidebar-link sidebar-page" aria-label="广州"><!---->广州<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/hangzhou.html" class="nav-link sidebar-link sidebar-page" aria-label="杭州"><!---->杭州<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/nanjing.html" class="nav-link sidebar-link sidebar-page" aria-label="南京"><!---->南京<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/qingdao.html" class="nav-link sidebar-link sidebar-page" aria-label="青岛"><!---->青岛<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/shenzhen.html" class="nav-link sidebar-link sidebar-page" aria-label="深圳"><!---->深圳<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/suzhou.html" class="nav-link sidebar-link sidebar-page" aria-label="苏州"><!---->苏州<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/xian.html" class="nav-link sidebar-link sidebar-page" aria-label="西安"><!---->西安<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/zhengzhou.html" class="nav-link sidebar-link sidebar-page" aria-label="郑州"><!---->郑州<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/jinan.html" class="nav-link sidebar-link sidebar-page" aria-label="济南"><!---->济南<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->北京都有哪些值得加入的IT互联网公司？</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月27日</span><meta property="datePublished" content="2022-03-27T08:36:50.000Z"></span><span 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18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category4" role>求职面试</li><meta property="articleSection" content="求职面试"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 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level3">教育&amp;医疗</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/beijing.html#娱乐" class="router-link-active router-link-exact-active toc-link level3">娱乐</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="北京都有哪些值得加入的it互联网公司" tabindex="-1"><a class="header-anchor" href="#北京都有哪些值得加入的it互联网公司" aria-hidden="true">#</a> 北京都有哪些值得加入的IT互联网公司？</h1><p>大家好，我是二哥呀，最近读者君哥那梳理完了北京的上百家知名科技公司，强烈要求二哥推荐给大家看看。刚好，二哥公众号后台数据一看，果然还是北京的小伙伴最多，年后大家有跳槽的意愿的话，不妨参考下！ 作为国家的科技中心，北京遍布着各种规模的互联网公司、国企、研究院、银行系，给求职者们提供了非常多的选择机会。</p><p>因为北京适合程序员工作的企业实在太多了，所以怎样给大家介绍北京适合程序员的工作机会一直让我十分头疼。如果写的太简单，我跟大家说北京有百度、腾讯、阿里、美团等等，大家一定觉得我是在废话，但把所有企业一次性全介绍了工作量太大，并且文章也看不出重点了。所以我最终决定，北京拆成三篇来讲，一篇介绍北京的国企央企研究所、一篇介绍北京的大型互联网公司和大型外企、一篇介绍北京的中小型互联网公司。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-68628d58-37ff-44c8-a3f6-6b9f4978f976.jpg" alt=""></p><p>我发现在互联网公司工作的程序员都对国企央企以及研究所十分好奇，但是因为这些单位的信息比较封闭，所以大家对于这些企业的工作方式以及薪酬情况都都不清楚。为了能给北京系列开个好头，第一篇文章我就以我熟悉的北京的国企央企研究所来给大家介绍了。想提前声明一点，虽然我有很多同学和朋友在北京国企央企以及研究所，但是同一个公司，不同的部门或者不同的组差别都太大了。尤其是研究所，每个系列都有数量庞大的下属研究所，并且下属的研究所独立性都特别高，所以风格差别很大。我只能把我见到的情况给大家做一个介绍，具体去到哪个研究所哪个团队还得你们自己去详细打听。只能说我的介绍相对于更接近一些真实。如果大家发现哪里有误，欢迎大家指出。</p><p>下面还是分开来介绍：</p><h2 id="国企-央企" tabindex="-1"><a class="header-anchor" href="#国企-央企" aria-hidden="true">#</a> 国企&amp;央企</h2><p>在这篇文章中说的都是国企和央企的直属软件开发中心，子公司是不包含在里面的。子公司的工作风格差别很大。总体来说，国企和央企在软件技术上都是差互联网公司一大截的，待遇好不好真的看具体公司。是有些好的国企，我一个朋友在某国企虽然工资不太高，但是上了两年没加过班。也有一些国企，加班比拼多多都重，但是工资低且福利差。</p><h3 id="银行软件开发中心" tabindex="-1"><a class="header-anchor" href="#银行软件开发中心" aria-hidden="true">#</a> 银行软件开发中心</h3><p>最近几年计算机相关专业应届毕业生对于银行的软件开发中心热情越来越高，主要是由于银行的软件开发中心比较稳定，薪酬也还可以。目前应届生选择比较多的是工行、农行、中国银行、邮储银行的软件开发中心。大家比较感兴趣就分开详细介绍下吧。银行软件开发中心在校招时和互联网公司不太一样，hr 只会和你说一个大概的工资，hr 说的工资只能参考，工资还是以实际发放为准。如果想知道具体工资你得私下去问和你关系好的学长学姐，或者只能等工资发下来了才能知道。另外银行软件开发中心的稳定也只是说轻易不会开除你，但是忙不忙就要看你运气了。银行软件开发中心有的组忙起来完全不虚 PDD。</p><h4 id="工商银行软件开发中心" tabindex="-1"><a class="header-anchor" href="#工商银行软件开发中心" aria-hidden="true">#</a> 工商银行软件开发中心</h4><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-b8653934-cc7f-4703-81f2-f654f7d4440a.png" alt=""></p><p>和同行相比，工商银行的软件开发中心算技术最好的了。工行喜欢招应届生，社招进来的比较少。刚进来的应届生职级是助理经理，税前年薪差不多是20万左右（到手15-16万吧，加上年终奖和节假日补贴）。工资发放方式稍微有点奇怪，就是每月发八九千，然后留一部分年底一并发放。每月会有饭补，过节也会有节假日补贴（放三天的节日假期给 1000，国庆给 2000，过年 4000）。这个职级的工资对于在北京工作来说还是有点难顶的，毕竟光跟人合租每月就要画掉两千多了。如果你是本科毕业进入工行，从助理经理升到经理一需要两年时间，硕士只需要一年，这个职级基本上全都能按时达到，不过工资变化不太大。从经理一升到经理二大约要一到两年的时间，这就看你能力了，经理二以后工资就相对多一些了，经理二绩效不太好的话每年到手能拿 22 万左右，如果绩效好，可能能拿到 29 万左右。经理二升经理三就完全看你自己能力了，到经理三以后每年到手都能 35 万左右，收入就很可观了。另外在工行发专利什么的也有些奖金，一个专利貌似是奖励 5000.</p><p>工行的总行是在珠海。工行在西安、杭州等地也设立了研发中心，都是属于总行。目前北京这边也一直在动员员工去西安，薪资和北京差不太多。听说西安那边的工行加班比较严重。北京这边总体还好，卷不卷看你组长了，不过你也可以不甩你领导，他们是很难开掉你的，他们能的只是绩效给你打低点，你工资少点。</p><h4 id="农业银行软件开发中心" tabindex="-1"><a class="header-anchor" href="#农业银行软件开发中心" aria-hidden="true">#</a> 农业银行软件开发中心</h4><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-fb046afd-1116-4619-a5ae-d9756863ca19.png" alt=""></p><p>感觉农业银行的软件开发中心技术比工行差一点，不过工资比工行多一些，刚毕业的应届生税前能到税前25万-32万（这是hr说的啊，我了解到的西安每月税后到手是 1万2，加上年终奖税前能算 20 万的年包，北京比西安稍微多一点点，但是多不了太多）。农行软件开发中心有个大问题就是工资分配很平均，但是工作量分布不均，有的组十分养生，有的组忙的受不了（越接近客户用的产品线越累）。我的一个学长天天早早就下班了，另外一个同学周末跟我吃个饭都急匆匆的，为了投产要加班到凌晨。目前农行内部的怨气比较大，这点大家在脉脉上也能看出来。农行想要升职还要去考软考。</p><h4 id="中国银行软件开发中心" tabindex="-1"><a class="header-anchor" href="#中国银行软件开发中心" aria-hidden="true">#</a> 中国银行软件开发中心</h4><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-e3490a86-2b92-4a47-8c68-8e2281c2cb32.png" alt=""></p><p>中国银行软件开发中心算是给钱最少的了，年包15万左右。这钱在北京确实太少了。不过工作是目前几个银行软开里最轻松的，家里不怎么缺钱，只想找个轻松稳定的可以选。</p><h4 id="邮政储蓄银行软件研发中心" tabindex="-1"><a class="header-anchor" href="#邮政储蓄银行软件研发中心" aria-hidden="true">#</a> 邮政储蓄银行软件研发中心</h4><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-4e15e06c-f808-4d79-954f-3fbca94ce6e6.png" alt=""></p><p>第一年包含试用期，年薪税前总包 26w, 第二年年薪税前总包 31w。加不加班看你运气了，运气好被分到好的组不怎么加班，运气不好就很惨了。在北京工作的话不会被外调，但是在西安等地工作的许多人会被外调。</p><h3 id="券商" tabindex="-1"><a class="header-anchor" href="#券商" aria-hidden="true">#</a> 券商</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-58cd1949-b992-4550-b2e1-b24c519c0a78.png" alt=""></p><p>曾经农行软开的一位领导来我们学校校招宣讲时就说因为银行的工资有限制，涨薪比较慢。所以很多银行软开的职工干几年后就会跑到券商去挣钱。那时我才知道券商居然还招不少程序员。后来我发现中信建投证券是真不错，北京这边校招生进来月薪 18k ，年终奖 6 个月，虽然薪资还是不及互联网公司，但是涨薪速度相比于其它国企央企还是快很多的。另外只有股票开市的日子用上班，加班很少。不过对于学历的要求比较高，必须是985硕士，并且还卡本科。</p><p>对于其它券商的情况我知道的就不多了，这里给大家提供一个找工作的思路，大家可以多去了解下。</p><h3 id="运营商" tabindex="-1"><a class="header-anchor" href="#运营商" aria-hidden="true">#</a> 运营商</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-1b67f498-dc2e-401f-b942-59455b941bd9.png" alt=""></p><p>这里说的运营商说的是移动联通还有电信的研究院。移动的工资发放风格和工行有异曲同工之妙，每个月发的工资很少，到年终会一起再发一些。应届生年薪大概 20w 左右，平时工资发一半，年终把剩下的一半发给你。联通在北京的研究院有两个，一个叫联通研究院，一个叫联通软件研究院。我听说的是联通研究院比较好，联通软件研究院比较坑。 电信研究院的据说很轻松，但是工资低，没朋友在这里，我不太确定，只是听说。</p><h2 id="研究所" tabindex="-1"><a class="header-anchor" href="#研究所" aria-hidden="true">#</a> 研究所</h2><p>北京有着数量庞大的研究所，比如航天科技系列、航空工业系列、中船舶系列、中科院系列、中电科系列、军事科学院下属系列、工信部下属研究院、中国兵器等等。不得不说计算机相关专业真的是万金油，因为上述研究所，不管他们主营业务是啥，他们全都招计算机相关专业的毕业生，并且招的还不少。</p><p>近几年想成为这些研究所的正式职工都需要是硕士以上了，签的本科生基本都是劳务派遣。户口的事放在生活里统一说。</p><p>可能家里的长辈听到你去了研究所会觉得很有面子。但是单论软件技术来说，目前研究所是落后于互联网公司的，并且差距还不算小。研究所和互联网公司的办事风格不太一样，互联网公司会把岗位划分的很细致甚至有的互联网公司会无限的细分一个岗位（这点是我觉得不太好的地方，因为划分的太细了，以后跳槽会存在问题），但是研究所的岗位又划分的太粗糙了（从订需求、写开发文档、代码开发、测试、到和客户扯皮这些流程全的你来搞）。另外因为研究所的大部分领导软件方面技术没有互联网那么专，所以对工作量的评估不是太准，有时候安排起活来就比较离谱。是否来研究所要想想明白以下几个问题：（1）你家庭的经济情况，至少北京买房首付家里能掏出来。（2）你的兴趣（如果只想安安静静的写代码，研究所不太合适）。（3）面试通过后你要充分的了解你所在的团队情况，同一个研究所，不同的团队的差别那可大了去了。</p><p>总体来说，个人感觉如果你在一个二线城市的研究所工作会比在一线城市研究所工作舒服。在一线城市去互联网公司干几年攒点钱撤一个二线城市压力没那么大。在北京的研究所工作北京户口是拿了，但是干几年根本攒不下多少钱，一线城市研究所分房这事就不用做梦了，充其量会给你提供一个宿舍，这种宿舍也就是毕业三到五年内可以住，以后就不能住了。相比于二线城市的研究所，一线城市研究所的工资每月多个两三千，但是房价是二线城市的三到五倍，生活幸福感会大打折扣。</p><h3 id="航天科技-航空工业" tabindex="-1"><a class="header-anchor" href="#航天科技-航空工业" aria-hidden="true">#</a> 航天科技&amp;航空工业</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-fcff3f6d-6357-48fe-a807-74c225ce0c95.png" alt=""></p><p>我有很多的校友都在航空航天系列的研究所。研究所的具体薪资都比较保密，大部分研究所在给你 offer 的时候不会像互联网公司那样把薪资给你说的清清楚楚并且写在合同上，而是大概和你说个数。而且你入职后两到三个月的薪资往往都很少，等三四个月以后薪资稳定了你才能确定你开多少钱。</p><p>航空航天目前效益比较好，算是研究所中薪资比较高的。另外食堂和宿舍都有，如果没宿舍还会有租房补贴。但是挣钱和互联网公司肯定没法比。薪资的话刚毕业的学生每月到手大概是一万出头，工资加上各种补贴年薪差不多税前能到20多万。加班没有加班费，出差会有出差补贴，有的团队出差一天补300，有的团队出差一天补400。所以如果你一个月都驻在外面的话，一个月工资到手也两万多呢。但是一年有个一两月出差还行，有的项目组一年有三分之二时间在外面出差，你会怀疑人生的。其实刚毕业头两年航空航天的薪资和互联网公司差距不大，不过在两三年后薪资水平就会逐渐拉开，研究所薪资涨的都慢。</p><p>另外航空航天的研究所是很忙的，所以别想着进来轻松。研究所的忙法和互联网公司不是一种忙法，有的人在工作强度大的互联网公司待过的可能觉得自己 996 和 007 都能抗，来个研究所还怕啥？我是想说你可能想的有点简单了，在研究所写代码只是工作的一小部分，让你烦心的事多着呢。只是说你如果不把领导打了的话，他不太容易把你开掉。另外研究所有个好处是比较支持在职读博，如果你的组不是太忙，提升下学历是个不错的选择。</p><h3 id="工信部下属研究院" tabindex="-1"><a class="header-anchor" href="#工信部下属研究院" aria-hidden="true">#</a> 工信部下属研究院</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-0f3b7783-4567-4f07-974d-a31b8d9ec939.png" alt=""></p><p>工信部下属的研究院整体上都不错，就比如信通院（中国信息通信研究院），如果你对这个单位陌生的话你可以看看你的行程码下面服务提供商排在第一个的是谁。信通院是制定标准的单位，也是监理单位。在信通院的话代码就很少写了，更多就是写文档了，不过信通院这种地方的视野肯定高一些。薪资的话信通院每个职工薪资差别很大，刚进去工资很低，可能就四五千块钱，但是薪资每个月都会变化，然后稳定在一个数。薪资低的每月到手有一万出头，但我知道每月到手两三万甚至更多的也是有的（不是领导啊，只是职工）。</p><h3 id="中科院系列" tabindex="-1"><a class="header-anchor" href="#中科院系列" aria-hidden="true">#</a> 中科院系列</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-96c5f7a6-b13b-4153-9c7f-7c4617dbddca.png" alt=""></p><p>中科院系列下计算机相关最强的三个所就是自动化所（搞 nlp 的应该都听过宗成庆老师）、软件所、计算所。另外还有信工所、电子所也还凑合。整体待遇上，中科院系列的待遇不如航空航天系列的。你可以把中科院系列的研究所完全的想象成一个大学（嗯，不用想象，确实是个大学，中国科学院大学嘛）。每个团队就是你们研究生的实验室。基本上就是一个大老板，带几个小老板，再带几个职工，另外再配几个中科院的学生。课题组想要挣钱也是需要大老板出去拉活，然后小老板带着学生去干活。工作方式和技术水平和你们研究生的实验室一模一样的，就是多了一些硕士博士职工罢了。</p><p>中科院系列各个所和各个课题组的待遇以及工作方式差距特别大，工资有少量的比较高的（我说的比较高是能和互联网公司持平），大部分刚进来的硕士应届生工资差不多就是八九千，博士一万多点。有的所提供宿舍，有的所连宿舍都没。总体上来说想在中科院有好的发展，需要你是博士，然后多发论文。等你成为小老板后，且团队可以项目成果转化，或者孵化企业后你的待遇会有比较大的变化。</p><h3 id="中电科系列" tabindex="-1"><a class="header-anchor" href="#中电科系列" aria-hidden="true">#</a> 中电科系列</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-a4804493-fdb0-48ea-b9f5-82ad9a3d3d08.png" alt=""></p><p>中电科系列的待遇比航空航天系列稍差，比中科院系列稍强一些。我感觉中电科系列的加班强度比较高，认识的几个在中电科系列的经常 996 甚至 007，还经常出差。待遇的话基本工资也是每月1万出头，然后出差也是有出差补贴，每天300 或者400，具体要看团队。感觉工资主要是靠出差补贴堆起来的。大部分下属院所会提供职工宿舍，中电科系列下属研究所风格差别很大，好起来是真好，坑起来是真坑啊。</p><h3 id="中国兵器系列" tabindex="-1"><a class="header-anchor" href="#中国兵器系列" aria-hidden="true">#</a> 中国兵器系列</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-db583262-a5d4-4137-88e1-90f0127ba755.png" alt=""></p><p>中国兵器系列计算机相关专业招的不是太多，其实每年一共招的人也不多。我最初对中国兵器系列的研究所有了解是一个所来我们学校宣讲。感觉中国兵器在西安的几个所能算的上是西安研究所的天花板了吧，待遇还不错（和航天504所比我有点不太确定）但是在北京我就不太清楚了。</p><h3 id="军事科学院系列" tabindex="-1"><a class="header-anchor" href="#军事科学院系列" aria-hidden="true">#</a> 军事科学院系列</h3><p>军事科学院系列的研究所招的职位都是军队文职，也就是说都需要考试的。我上时，听过几家军事科学院下属单位来宣讲，只是有个粗略的了解。军队文职也是上班制的，上班时也是需要穿军装的，下班后的生活不干预。工资有个很详细的职称对应表，硕士进去我记得是一万出头。想有好的发展最好去抓总单位，因为上面提的很多研究所想要项目都得抓总单位批。不过抓总单位的科研岗都要博士了，硕士进去只能是支撑岗位。</p><p>北京来我们学校宣讲的几家军科院下属研究所都是承诺户口以及包解决子女上学问题的。当时说的是博士进去副营级，会提供一个四十平左右的房子住。硕士就是普通两人一间的宿舍。</p><h2 id="生活方面" tabindex="-1"><a class="header-anchor" href="#生活方面" aria-hidden="true">#</a> 生活方面</h2><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-799a0d1a-7782-4e3c-8a36-4c495cd94ae5.png" alt=""></p><p>北京具体的房价、美食教育等情况我放到下一篇讲北京互联网公司的文章中好好去讲下。这篇文章只讲一个事，那就是<strong>北京户口</strong>。北京户口的主要用处就是子女教育问题，其它的一些好处就是有北京户口可以申请共有产权房还有摇车牌等。应届毕业生是最好搞定户口的时候了，如果你能进这篇文章中讲的这些单位，大概率你是有户口的。不过拿户口的同时都要签一个五年的服务期合同，违约金每个单位不一样， 20万-50万不等，逐年递减。对于应届生来说户口貌似吸引力没有特别的大，毕竟现在自己还顾不过来，也不知道自己子女在哪呢。但是对于已经有子女的人来说，我一提给北京户口的事他们眼睛就亮了。</p><p>北京这些年对于户口有也逐渐放宽，一些互联网公司的特殊应届招聘计划也会给户口，另外今年双一流学科的硕士以上应届毕业生都给户口了。</p><p>另外想要户口还可以走积分落户，不过想要靠积分落户解决北京户口，就需要你头上有犄角，身后有尾巴了。</p><p>好啦，这篇文章就介绍这么多，期待下一篇北京有哪些大型互联网公司和外企吧！</p><h3 id="互联网大厂" tabindex="-1"><a class="header-anchor" href="#互联网大厂" aria-hidden="true">#</a> 互联网大厂</h3><p>谈到互联网公司，免不了说薪资。很多应届生校招时由于没有工作经验，容易被哄。首先要知道，校招给你开出的薪资是可以 argue 的，也就是说可以和 hr 商量。然后我主要想说的是，要谈你去和 HR 谈 <strong>base</strong>（每月基础工资）, 可不敢去和 hr argue 每年多少薪哈。一个哥们给我讲了个真事，他们公司一个应届生嫌 25k x 15 少，HR 跟他说那给你 25k X 16 吧，然后那个应届生就开心的答应了。HR 给你承诺的每月 base 是没问题的，但是说每年发多少个月的月薪只是一个期望，最终给你发几个月的年终奖要根据你到年底的评分以及你所在团队年底的评分共同决定。</p><p>下面我说的各个公司薪资时说的每年多少薪也是 HR 说的一个期望薪资呀！许多说发 4 个月年终奖的，实际上一半人拿不到。</p><h4 id="百度" tabindex="-1"><a class="header-anchor" href="#百度" aria-hidden="true">#</a> 百度</h4><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-7d1367ae-04c1-4162-aed8-2a99203a623d.jpg" alt=""></p><p>坐标：西北旺</p><p>2022校招薪资：开发岗白菜价 22k，sp 24k，ssp 26k 。算法岗白菜价 26k，sp 29k，ssp 32k。每年 16 薪。</p><p>个人评价：曾经十分强大的百度这几年逐渐和腾讯阿里拉开了差距。不过就我个人而言还是比较喜欢百度的。首先百度是以技术为导向的，这一点作为程序员应该会有比较好的体验，另外百度总体来说加班不是特别严重。工作制差不多 975 或者是 985, 前两周我趁着去找在百度的同学玩的机会，周六下午三点左右在百度大楼里转了一圈，最起码周末是没几个工位上有人的。工位上有人的看样子也是趁周末想自己单独学习会。另外百度的办公环境还不错，食堂也很好。百度在北京的部门以及岗位都特别齐全，只是大量的开发岗位用 php 有点难顶。</p><p>百度这两年集中发展人工智能，这一点在给校招开出的薪资上也能看得出来。不得不说这两年校招的薪资是真高呀，就不用说算法岗校招的薪资，开发岗校招的薪资都倒挂了不少老员工。百度在算法上投入的决心是挺大的，自己能搞出深度学习框架 PaddlePaddle 十分让我敬佩。读研时实验室显卡不够我还经常上百度的 AI Studio 平台上薅羊毛，有次顺手打了个比赛得了个名次，排名不高，但百度还真给我寄来几百块钱的购物券。只是最近百度无人车进展的不太顺利，感觉是百度人工只能发展的一大挫折了。</p><h4 id="腾讯" tabindex="-1"><a class="header-anchor" href="#腾讯" aria-hidden="true">#</a> 腾讯</h4><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-7d6cd775-8895-447a-a348-27443594bdcd.jpg" alt=""></p><p>坐标：西北旺</p><p>2022校招薪资：19-25k，每年 16 薪；每月 4k 租房补贴；6-10 w的签字费分两年发放。</p><p>个人评价：北京这边腾讯和百度的办公楼离得很近，腾讯在北京这边的部门主要是 PCG 事业群（PCG 中都是腾讯和媒体宣传相关的部门，包含腾讯视频、腾讯新闻、腾讯QQ等，另外央视频也是包给北京这边的腾讯做的。话说PCG 在脉脉上被喷的很惨）。腾讯主要用的语言是 C++ 和 Go，我见过一个部门招 Java 的，不过一方面是招的人数太少，一方面在腾讯做 Java 总觉得有点怪怪的。介绍百度时说的百度是以技术为导向的是说给腾讯听的，因为腾讯是以产品为导向的。产品的话语权比程序员大。</p><p>腾讯的福利是特别香的，食堂也很好。特别今年把租房补贴涨到了4k。那肯定有鹅选鹅呀。</p><p>近期搜狗也并入腾讯了，并到了腾讯的 Pcg 事业群下，目前各方面已经和腾讯对齐了。我有个同学先在腾讯的 PCG 实习，然后校招最终选择了去搜狗，结果又被并回 PCG 了，也是特别的缘分。上面的图就是我在搜狗茶水间拍到的照片~可以看到已经都换成腾讯 logo 了。搜狗不在西北旺，搜狗在五道口附近呀。</p><h4 id="阿里巴巴" tabindex="-1"><a class="header-anchor" href="#阿里巴巴" aria-hidden="true">#</a> 阿里巴巴</h4><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-996bbbca-dd9c-4108-b796-46f29dd840e9.jpg" alt=""></p><p>坐标：望京</p><p>2022校招薪资：开发岗白菜价 21-24k，sp 25-28k，ssp 29-30k。算法岗白菜价 25k，sp 29-31k，ssp 33-36k。每年 16 薪，签字费 1-10w，还会额外发 6k 的搬家费。</p><p>个人评价：北京的阿里巴巴大楼在望京。另外目前阿里巴巴的北京总部也在建设中，预计2023年投入使用。阿里巴巴近两年一直有负面消息，我个人而言也不太喜欢阿里的狼性文化。但是有一说一，阿里的技术在国内的互联网是数一数二的。从阿里出来的职工跳槽的认可度绝对是很高的。不过还是求求你们别卷啦！</p><h4 id="字节跳动" tabindex="-1"><a class="header-anchor" href="#字节跳动" aria-hidden="true">#</a> 字节跳动</h4><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-fd757b6c-154c-4aa6-95a8-467d6a9a83b4.jpg" alt=""></p><p>坐标：中航广场</p><p>2022校招薪资：开发岗白菜价22-24k，sp 26-28k，ssp 30-33k。算法岗白菜价26-29k，sp 30-32k，ssp 35k。每年15薪，还有1w-12w的签字费，我看大部分是 1w！住在 30分钟内可以到达公司的地方额外会有 1500 的租房补贴。</p><p>个人评价：目前字节慢慢的把 BAT 中的 B 换成了 ByteDance 的 B，字节目前技术的认可度是很高的。我的一位学长 18 年时纠结去京东还是去字节（18年时我听字节跳动这个名字还有些许陌生），最终去了字节。然后他现在的薪资已经让我十分惊叹了。字节跳动的福利待遇也特别好，最近因为业务影响裁应届生虽然是无奈之举，不过或多或少对公司有点影响。字节最近在西安设立了研发中心，另外听说在青岛开了一个元宇宙研发中心，工作地点在市北，校招招人，感兴趣的可以去看看。</p><h4 id="美团" tabindex="-1"><a class="header-anchor" href="#美团" aria-hidden="true">#</a> 美团</h4><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-809a1c71-7a8f-43c8-ad4b-befab2fe5cf2.jpg" alt=""></p><p>坐标：望京</p><p>2022校招薪资：开发岗白菜价21k，sp 24k，ssp 27-29k。算法岗白菜价 24k，sp 27k，ssp30-32k。每年15.5薪。其余的福利也就是每天 30 饭补和 9 点以后打车了。</p><p>个人评价：美团的技术绝对没得说，特别是对于应届生有不错的培养，美团的学城上有很多质量很高的技术资料，许多从美团离职的员工都想念美团的学城。另外给的薪资从去年薪资大涨后也算不错了。虽然今年校招比去年没怎么涨，只是在 ssp 的薪资上做了一些调整，但是凭良心讲，一个应届生这个价确实不低了。不过美团的办公环境和福利就太差劲了，首先美团的办公大楼都是租的，工位也都很简陋，也没食堂。别的公司过节发礼品，好家伙，你团发个贺卡，要么发个微信的红包专属封皮...</p><h4 id="京东" tabindex="-1"><a class="header-anchor" href="#京东" aria-hidden="true">#</a> 京东</h4><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-e08e1eef-6561-4057-a12e-3a1183fb9ae1.png" alt=""></p><p>坐标：亦庄</p><p>2022校招薪资: 开发岗白菜价 19.5-23k，sp 25-26.5k，ssp 29k。算法岗白菜价 27.5k，sp 31-33.5k，ssp 36.5k。每年 15 薪。</p><p>个人评价：首先说坐标哦，京东在亦庄，租房会相对便宜一些，省到就是赚到。然后说薪资，京东有个不太好的地方就是薪资的 20% 是绩效，虽然绩效一般都能拿满，但是这部分绩效就不用交住房公积金了呀。京东周末很少加班，周内大部分 8 点左右下班的样子。</p><h4 id="网易" tabindex="-1"><a class="header-anchor" href="#网易" aria-hidden="true">#</a> 网易</h4><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-fc7b1b08-0363-4af6-adc2-e6185c55bb9c.png" alt=""></p><p>坐标:西北旺</p><p>2022校招薪资:北京这边网易的薪资划分的不太明确，我看开发爆料出的月薪从 18.4k、22k、24k、25.5k的都有。算法爆出的月薪 25.5k，27.5k, 30k的都有。每年 15 薪。</p><p>个人评价:北京这边基本上都是网易有道团队的，今年薪资给的不太行呀，不过我百度的朋友和我说他每次晚上看网易大楼的灯总是关的最早的（西北旺聚集的几家公司在楼上可以互相看到对方）</p><h3 id="大型外企" tabindex="-1"><a class="header-anchor" href="#大型外企" aria-hidden="true">#</a> 大型外企</h3><p>外企的 wlb（工作生活平衡）一直是大家十分喜欢的，不过近几年由于国内互联网大厂给的实在太多了。同样的水平国内互联网给的薪资大概会比外企多50%左右。另外一些同学也会担心在外企待几年后工作和技术适应不了国内的强度。所以许多 offer 收割机拿到许多大厂 offer 和大型外企 offer 后也会犹豫该去哪。</p><p>许多人会问面外企是否需要用英文面试？我问了几位在外企的老哥，共同的说法是要看你面的组和职级。有的组是频繁和国外开会交流的，这自然需要你英语好，但是如果你面的组和国外开会少，那么就不需要你英语好。另外看你面的职级是否比较高，如果职级高，和国外交流的事自然少不了。但是如果你只是组长给你布置活你干的话，也不需要你英语好。</p><h4 id="hulu" tabindex="-1"><a class="header-anchor" href="#hulu" aria-hidden="true">#</a> Hulu</h4><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-483d5154-671c-4ef4-844c-3240f34b6008.png" alt=""></p><p>坐标：望京</p><p>2022校招薪资：Hulu 招人的量不大，所以爆料薪资的人不多。有限的几个爆料的年包都在 50w 以上。</p><p>个人评价：可能做开发的同学没听说过这个公司，不过做算法的同学应该知道这家公司的很多，这家公司出了一本挺不错的书籍叫《百面机器学习》。有许多同学应该在准备算法面试时看过这本书。Hulu 是美国的一个比较热的视频网站。严格的来说 Hulu 应该算是一家小而美的公司，不能算大型企业。但是因为 Hulu 工资不错，技术很好，另外也不加班。所以 Hulu 的 offer 比许多大型企业的 offer 还有诱惑力。</p><h4 id="微软" tabindex="-1"><a class="header-anchor" href="#微软" aria-hidden="true">#</a> 微软</h4><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-e0dbb967-2bb3-453f-8384-02c1c0aa61a0.png" alt=""></p><p>坐标：离五道口也不远。</p><p>个人评价：微软的薪资情况和面试考察重点等在介绍苏州时已经详细介绍过了，就不在重复介绍了，大家感兴趣的可以看<a href="https://mp.weixin.qq.com/s/rM5ZpId7O2OBzFb5sHcjeA" target="_blank" rel="noopener noreferrer">这里<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>。不过相比在微软苏州工作而言，在北京的房价和消费情况水平下，微软北京的薪资就不算太香了。什么？给我 offer 我去不去? 马上去！ 微软北京前些年的落户指标比较多，不过近几年微软的落户指标相对少一些了。</p><h4 id="shoppe-虾皮" tabindex="-1"><a class="header-anchor" href="#shoppe-虾皮" aria-hidden="true">#</a> Shoppe（虾皮）</h4><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-ea99812c-fdb6-44a6-bc55-79c15ad37a3a.jpg" alt=""></p><p>坐标：五道口附近，和搜狗挨着。那片有好多互联网公司。</p><p>2022校招薪资：白菜价 22k，sp 25k，ssp 27k。有3万签字费，以及12万股票分三年发放。</p><p>个人评价：你可以把虾皮想象成东南亚的淘宝。我还是比较喜欢虾皮的，薪资很高，技术也不错。但是网传的 965 是没几个组能达到的，虾皮说是外企其实和国内互联网公司风格差不太多。近几年虾皮也越来越卷了。虾皮周六应该是不用加班，前两周周六我和我同学去转了一圈，大门是锁着的。听说周内 7 点到 10 点下班的组都有。</p><h4 id="amazon" tabindex="-1"><a class="header-anchor" href="#amazon" aria-hidden="true">#</a> Amazon</h4><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-9a9d93ca-89fa-4b67-a491-d085eb2601d3.png" alt=""></p><p>坐标：朝阳区远洋国际中心</p><p>2022校招薪资：亚马逊的基础年薪我看到有30w和34.9w 两个档，配给员工的股票也有 23w 和 27w 两个档（第一年发5%，第二年发15%，第三年和第四年都是发40%），签字费第一年会给9.5w的签字费，第二年还会给6.9w的签字费。</p><p>个人评价：最近几年外企不如国内互联网大厂开出的薪资高，但是外企的养生一直是大家十分喜欢的。亚马逊在外企中算是比较抠的，不过因为近几年亚马逊股票涨的多，所以给了员工股票后员工还是大赚。另外有个缺点就是亚马逊在国内的业务相对比较边缘，但是亚马逊的光环很耀眼，员工出来还是很受欢迎的。</p><h4 id="apple" tabindex="-1"><a class="header-anchor" href="#apple" aria-hidden="true">#</a> Apple</h4><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-ba5e8a95-1cf8-42f9-aacc-3573cd93f19f.png" alt=""></p><p>坐标：朝阳区建国门外大街国贸大厦</p><p>个人评价：苹果的保密相当的严格，我也没有关系好的在苹果上班的朋友，所以我也没找到苹果今年校招的薪资是多少。苹果北京的业务比较边缘，岗位基本都是做功能本土化的工作。工作时间是去掉午休后满 8 小时就可以。</p><h4 id="airbnb" tabindex="-1"><a class="header-anchor" href="#airbnb" aria-hidden="true">#</a> Airbnb</h4><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-b9d6ef38-e7c1-4e00-8409-2f63489a5d6c.png" alt=""></p><p>坐标:朝阳区环球金融中心</p><p>2022校招薪资：基础年薪35w，额外基础薪资 15% 的奖金，8w 美元股票分 4 年发放。</p><p>个人评价：爱彼迎优势是 wlb（工作生活平衡），且薪资也很不错，这个股票太有诱惑力了。 当然缺点也是有的，这里引用脉脉上一个 Airbnb 职工的匿名评论“Airbnb单纯做项目基本学不到啥技术 、框架封装的太完善且都是业务。自学能力强的话可以来，如果想单纯靠做项目提升能力就需要慎重了”。我感觉这个挺适合我的哦~ 上班干活，六点下班再写写文章，完美。</p><p>好了，详细介绍的就这么多了。另外谷歌由于在国内招的人十分的少，我也没有在谷歌上班的大神朋友，所以谷歌的信息我就不知道了。Paypal 我找到的信息也有点少，也不展开介绍了，貌似 PayPal 在上海部门比较齐全，北京这边工作地点我最初都没搜到，还是根据朋友圈一个朋友提醒在 boss 上找到的，在朝阳区金地中心。</p><h2 id="生活成本" tabindex="-1"><a class="header-anchor" href="#生活成本" aria-hidden="true">#</a> 生活成本</h2><p>在北京的生活就仁者见仁智者见智了，有的人喜欢他的繁华与机遇，有的人讨厌他的拥挤与压力。</p><h3 id="房价" tabindex="-1"><a class="header-anchor" href="#房价" aria-hidden="true">#</a> 房价</h3><p>买房的事往后稍稍，咱们先说租房的事。注意啊，我下面说的上班方便基本上就是出门后一个小时内到公司呀！来了北京后大概率事要和人合租了，像上面说的在腾讯百度等西二旗这片区域上班的，大多数选择在回龙观这块和人合租，相对便宜且有地铁站上班比较方便。在回龙观这块租一个 10 来平的卧室大约 2500 左右吧。 在五道口那片上班和望京那片上班的在附近租房要更贵点，租一个 10 来平的卧室大概每月要花 3000+。当然在望京上班可以沿着14号线租的远点，租金会便宜点，上班直接坐着地铁过来也还挺方便。在亦庄那边上班的租房会相对便宜点，2000多点基本可以。想要一个住且在上述公司上班方便，租一个30平左右的一居室基本最低每月都要 5000 以上了。</p><p>另外大家还可以瞅着点公租房，租金会比较便宜，单租一间 40 平的房子也就不到 3000，只是限制会比较多。部分公司会有公租房名额，我记得度小满就能协助职工申请公租房。申请一居室的会容易点，两居室的难申请。</p><p>下面就说买房的事了，算了，我对北京买房的事也没什么见解。贴个图你们自己看吧，数据不一定准，就感受下房价有多高吧....密云延庆什么的就太远了，当然有很多人在北京上班在天津买房或者廊坊买房的。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-e5bc2cf6-647d-43f9-9352-934440d71b16.png" alt=""></p><h3 id="美食" tabindex="-1"><a class="header-anchor" href="#美食" aria-hidden="true">#</a> 美食</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-148db131-6c78-4cbf-86a0-465d88fdd217.png" alt=""></p><p>有一句话叫“京城无美食”。虽然这句话有点极端但是也有点道理的。美食的聚集地大部分是沿山沿海沿河沿江的地方，北京一直不是一个美食原料富足的地方。北京常说的北京名菜特点不像鲁菜川菜江苏菜那样特点鲜明。我能想到的北京特色的饭也就是烤鸭、涮羊肉、爆肚、炒肝、京酱肉丝、炸酱面，除了这些还真不太好想了。在北京有个好处是你能在这里吃到全国各地的美食，因为北京全国各地甚至世界各地的人都有，所以各省各国风味的餐厅都会有，但是感觉风味上还是根据北京这边的口味做了一些改变。</p><p>抛开美食说一个现实的问题，就是吃饭的花销。你在学校时一顿饭也就是十块左右。来到北京后吃饭的花销基本上要比你学校的花销贵一倍左右（因为老板的房租也会摊到饭的价格中）。如果你公司有食堂还好，要是公司没食堂只能吃外卖的话，自己的腰包和胃都受不了。说到这我觉得我以后晚饭还是自己做吧。</p><h3 id="教育-医疗" tabindex="-1"><a class="header-anchor" href="#教育-医疗" aria-hidden="true">#</a> 教育&amp;医疗</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-dc5e04dd-8a49-45b2-b96d-e1a17a2405f2.png" alt=""></p><p>北京的教育和医疗肯定全国顶级了。再往详细的介绍我觉得我写不出什么有深度的东西了，对于教育和医疗来说，我觉得我这个刚毕业不到一年的人肯定不如在北京待了多年的并且有孩子的了解的多。我只是知道虽然北京的高考会比其它省份容易很多，但北京一贯实行的素质教育对于孩子家长来说会很累，今天陪孩子学个交谊舞，明天学个马术，后天学校开个家长联谊会。对于 996 或者 995 的程序员家长来说真的有点难顶，不像我们上学时很少叫家长了。</p><h3 id="娱乐" tabindex="-1"><a class="header-anchor" href="#娱乐" aria-hidden="true">#</a> 娱乐</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/beijing-58c387f7-575f-4c2f-9702-e62d7b7575dc.png" alt=""></p><p>北京值得去的玩的地方很多的，圆明园、颐和园、故宫、香山、各种胡同、各种博物馆、各种茶馆。听个相声、听个演唱会，看个体育比赛都是不错的休闲方式。去各种商场转一转买点东西也是休闲。当然因为北京这么大所以周末出来玩一趟会特别花时间。北京的国家级景区票价是比较便宜的，我记得颐和园门票也就四五十，不像其它地区的景区动辄好几百的门票。</p><blockquote><p>作者：朱晋君，转载链接：<a href="https://mp.weixin.qq.com/s/xlPZfpd89rDq6L-Me80wnw" target="_blank" rel="noopener noreferrer">https://mp.weixin.qq.com/s/xlPZfpd89rDq6L-Me80wnw<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in 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aria-label="新浪微博成都研发中心"><!---->新浪微博成都研发中心<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/chengdu.html#中兴成都研发中心" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="中兴成都研发中心"><!---->中兴成都研发中心<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/chengdu.html#oppo-成都" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="OPPO（成都）"><!---->OPPO（成都）<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/chengdu.html#爱奇艺-成都" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="爱奇艺（成都）"><!---->爱奇艺（成都）<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/chengdu.html#携程成都研发中心" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="携程成都研发中心"><!---->携程成都研发中心<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/chengdu.html#商汤科技-成都" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="商汤科技（成都）"><!---->商汤科技（成都）<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/chengdu.html#京东成都研发中心" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="京东成都研发中心"><!---->京东成都研发中心<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/chengdu.html#科大讯飞-成都" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="科大讯飞（成都）"><!---->科大讯飞（成都）<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/chengdu.html#thoughtworks-成都" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="ThoughtWorks（成都）"><!---->ThoughtWorks（成都）<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/chengdu.html#garmin佳明" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="GARMIN佳明"><!---->GARMIN佳明<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/chengdu.html#极米科技" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="极米科技"><!---->极米科技<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/chengdu.html#聚美优品" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="聚美优品"><!---->聚美优品<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/chengdu.html#锤子科技-忽略" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="锤子科技（忽略）"><!---->锤子科技（忽略）<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/chengdu.html#完美世界-成都" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="完美世界（成都）"><!---->完美世界（成都）<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/chengdu.html#多益网络-成都" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="多益网络（成都）"><!---->多益网络（成都）<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/chengdu.html#当乐网" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="当乐网"><!---->当乐网<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/chengdu.html#实习僧" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="实习僧"><!---->实习僧<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/chengdu.html#迅游网络" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="迅游网络"><!---->迅游网络<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/chengdu.html#趣乐多" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="趣乐多"><!---->趣乐多<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/chengdu.html#理想境界" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="理想境界"><!---->理想境界<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/chengdu.html#咕-咚" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="咕 咚"><!---->咕 咚<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/chengdu.html#百词斩" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="百词斩"><!---->百词斩<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/chengdu.html#鲁大师" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="鲁大师"><!---->鲁大师<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/chengdu.html#优客逸家" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="优客逸家"><!---->优客逸家<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/chengdu.html#testbird" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="TestBird"><!---->TestBird<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/chengdu.html#实验楼" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="实验楼"><!---->实验楼<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/chengdu.html#西瓜创客" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="西瓜创客"><!---->西瓜创客<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/chengdu.html#医联" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="医联"><!---->医联<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/chengdu.html#camera360" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="Camera360"><!---->Camera360<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/chengdu.html#小鸡叫叫" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="小鸡叫叫"><!---->小鸡叫叫<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/chengdu.html#摹客" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="摹客"><!---->摹客<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/chengdu.html#美洽科技" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="美洽科技"><!---->美洽科技<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/chengdu.html#tap4fun" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="tap4fun"><!---->tap4fun<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/chengdu.html#知道创宇" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="知道创宇"><!---->知道创宇<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/chengdu.html#梦工厂" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="梦工厂"><!---->梦工厂<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/chengdu.html#其他" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="其他"><!---->其他<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/cityselect/guangzhou.html" class="nav-link sidebar-link sidebar-page" aria-label="想去广州了！"><!---->想去广州了！<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/hangzhou.html" class="nav-link sidebar-link sidebar-page" aria-label="杭州有哪些顶级的互联网公司？"><!---->杭州有哪些顶级的互联网公司？<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/nanjing.html" class="nav-link sidebar-link sidebar-page" aria-label="南京有哪些靠谱的互联网公司？"><!---->南京有哪些靠谱的互联网公司？<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/qingdao.html" class="nav-link sidebar-link sidebar-page" aria-label="青岛有牛逼的互联网公司吗？"><!---->青岛有牛逼的互联网公司吗？<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/shenzhen.html" class="nav-link sidebar-link sidebar-page" aria-label="深圳有哪些牛批的互联网公司？"><!---->深圳有哪些牛批的互联网公司？<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/suzhou.html" class="nav-link sidebar-link sidebar-page" aria-label="想搬去苏州生活了。。"><!---->想搬去苏州生活了。。<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/xian.html" class="nav-link sidebar-link sidebar-page" aria-label="西安有哪些不错的互联网公司？"><!---->西安有哪些不错的互联网公司？<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/zhengzhou.html" class="nav-link sidebar-link sidebar-page" aria-label="郑州有哪些不错的互联网公司？"><!---->郑州有哪些不错的互联网公司？<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->成都有哪些牛批的互联网公司？</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月27日</span><meta property="datePublished" content="2022-03-27T08:36:50.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 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aria-hidden="true">#</a> 华为成研所</h2><ul><li>类型：通信设备商</li><li>地址：成都市郫都区西源大道成都华为研究所</li><li>网址：https://career.huawei.com/</li></ul><hr><h2 id="腾讯成都研发中心" tabindex="-1"><a class="header-anchor" href="#腾讯成都研发中心" aria-hidden="true">#</a> 腾讯成都研发中心</h2><ul><li>类型：社交、互联网</li><li>地址：成都市武侯区天府三街腾讯大厦</li><li>网址：https://careers.tencent.com/</li></ul><hr><h2 id="蚂蚁金服-成都" tabindex="-1"><a class="header-anchor" href="#蚂蚁金服-成都" aria-hidden="true">#</a> 蚂蚁金服（成都）</h2><ul><li>类型：电商、互联网</li><li>地址：成都市武侯区蚂蚁C空间</li><li>网址：https://campus.alibaba.com/</li></ul><hr><h2 id="字节跳动成都研发中心" tabindex="-1"><a class="header-anchor" href="#字节跳动成都研发中心" aria-hidden="true">#</a> 字节跳动成都研发中心</h2><ul><li>类型：互联网</li><li>地址：成都市武侯区OCG国际中心</li><li>网址：https://jobs.bytedance.com/</li></ul><hr><h2 id="美团成都研发中心" tabindex="-1"><a class="header-anchor" href="#美团成都研发中心" aria-hidden="true">#</a> 美团成都研发中心</h2><ul><li>类型：互联网</li><li>地址：成都市天府一街两江国际A座</li><li>网址：https://campus.meituan.com/</li></ul><hr><h2 id="滴滴成都研发中心" tabindex="-1"><a class="header-anchor" href="#滴滴成都研发中心" aria-hidden="true">#</a> 滴滴成都研发中心</h2><ul><li>类型：出行、互联网</li><li>地址：成都市锦江区天府国际大厦</li><li>网址：https://talent.didiglobal.com/</li></ul><hr><h2 id="新浪微博成都研发中心" tabindex="-1"><a class="header-anchor" href="#新浪微博成都研发中心" aria-hidden="true">#</a> 新浪微博成都研发中心</h2><ul><li>类型：互联网</li><li>地址：成都市武侯区天府软件园C区</li><li>网址：https://career.sina.com.cn/</li></ul><hr><h2 id="中兴成都研发中心" tabindex="-1"><a class="header-anchor" href="#中兴成都研发中心" aria-hidden="true">#</a> 中兴成都研发中心</h2><ul><li>类型：通信设备商</li><li>地址：成都市武侯区中兴通讯大厦</li><li>网址：http://job.zte.com.cn/</li></ul><hr><h2 id="oppo-成都" tabindex="-1"><a class="header-anchor" href="#oppo-成都" aria-hidden="true">#</a> OPPO（成都）</h2><ul><li>类型：通信、硬件、移动互联网</li><li>地址：成都市武侯区OCG国际中心</li><li>网址：http://oppo.zhaopin.com/</li></ul><hr><h2 id="爱奇艺-成都" tabindex="-1"><a class="header-anchor" href="#爱奇艺-成都" aria-hidden="true">#</a> 爱奇艺（成都）</h2><ul><li>类型：视频、互联网</li><li>地址：成都市武侯区天府软件园E区</li><li>网址：https://careers.iqiyi.com/</li></ul><hr><h2 id="携程成都研发中心" tabindex="-1"><a class="header-anchor" href="#携程成都研发中心" aria-hidden="true">#</a> 携程成都研发中心</h2><ul><li>类型：互联网</li><li>地址：成都市武侯区天府四街携程大厦</li><li>网址：https://careers.ctrip.com/index.html#/</li></ul><hr><h2 id="商汤科技-成都" tabindex="-1"><a class="header-anchor" href="#商汤科技-成都" aria-hidden="true">#</a> 商汤科技（成都）</h2><ul><li>类型：人工智能</li><li>地址：成都市天府新区天府箐容中心</li><li>网址：https://www.sensetime.com/cn/join-index</li></ul><hr><h2 id="京东成都研发中心" tabindex="-1"><a class="header-anchor" href="#京东成都研发中心" aria-hidden="true">#</a> 京东成都研发中心</h2><ul><li>类型：电商、互联网</li><li>地址：成都市武侯区武兴三路西部智谷D区</li><li>网址：https://about.jd.com/zhaopin/</li></ul><hr><h2 id="科大讯飞-成都" tabindex="-1"><a class="header-anchor" href="#科大讯飞-成都" aria-hidden="true">#</a> 科大讯飞（成都）</h2><ul><li>类型：人工智能、数据服务</li><li>地址：成都市天府新区菁蓉中心A区</li><li>网址：https://candidate.iflytek.com/</li></ul><hr><h2 id="thoughtworks-成都" tabindex="-1"><a class="header-anchor" href="#thoughtworks-成都" aria-hidden="true">#</a> ThoughtWorks（成都）</h2><ul><li>类型：企业服务、信息安全</li><li>地址：成都市武侯区天府软件园E区</li><li>网址：https://www.thoughtworks.com</li></ul><hr><h2 id="garmin佳明" tabindex="-1"><a class="header-anchor" href="#garmin佳明" aria-hidden="true">#</a> GARMIN佳明</h2><ul><li>类型：通讯电子，智能硬件</li><li>地址：成都市武侯区天府软件园C区</li><li>网址：https://www.garmin.com.cn/job/</li></ul><hr><h2 id="极米科技" tabindex="-1"><a class="header-anchor" href="#极米科技" aria-hidden="true">#</a> 极米科技</h2><ul><li>类型：硬件、电商</li><li>地址：成都市武侯区天府软件园A区</li><li>网址：https://www.xgimi.com/</li></ul><hr><h2 id="聚美优品" tabindex="-1"><a class="header-anchor" href="#聚美优品" aria-hidden="true">#</a> 聚美优品</h2><ul><li>类型：电商</li><li>地址：成都市武侯区天府软件园G区</li><li>网址：http://www.jumei.com</li></ul><hr><h2 id="锤子科技-忽略" tabindex="-1"><a class="header-anchor" href="#锤子科技-忽略" aria-hidden="true">#</a> 锤子科技（忽略）</h2><ul><li>类型：硬件、移动互联网</li><li>地址：成都市成华区龙潭工业园</li><li>网址：https://www.smartisan.com/support/#/join</li></ul><hr><h2 id="完美世界-成都" tabindex="-1"><a class="header-anchor" href="#完美世界-成都" aria-hidden="true">#</a> 完美世界（成都）</h2><ul><li>类型：游戏、移动互联网</li><li>地址：成都市武侯区天府软件园C区完美世界大楼</li><li>网址：http://jobs.wanmei.com/</li></ul><hr><h2 id="多益网络-成都" tabindex="-1"><a class="header-anchor" href="#多益网络-成都" aria-hidden="true">#</a> 多益网络（成都）</h2><ul><li>类型：游戏、移动互联网</li><li>地址：成都市武侯区天府软件园G区</li><li>网址：https://xz.duoyi.com/</li></ul><hr><h2 id="当乐网" tabindex="-1"><a class="header-anchor" href="#当乐网" aria-hidden="true">#</a> 当乐网</h2><ul><li>类型：游戏、移动互联网</li><li>地址：成都市高新区天府软件园E区1号楼</li><li>网址：https://www.d.cn/hr/</li></ul><hr><h2 id="实习僧" tabindex="-1"><a class="header-anchor" href="#实习僧" aria-hidden="true">#</a> 实习僧</h2><ul><li>类型：招聘、企业服务</li><li>地址：成都市武侯区天府五街软件园G区7栋</li><li>网址：https://www.shixiseng.com/tc/normal/mx2021</li></ul><hr><h2 id="迅游网络" tabindex="-1"><a class="header-anchor" href="#迅游网络" aria-hidden="true">#</a> 迅游网络</h2><ul><li>类型：游戏</li><li>地址：成都市武侯区天府软件园D区</li><li>网址：http://www.xunyou.com/hr/</li></ul><hr><h2 id="趣乐多" tabindex="-1"><a class="header-anchor" href="#趣乐多" aria-hidden="true">#</a> 趣乐多</h2><ul><li>类型：游戏</li><li>地址：成都市武侯区天府软件园C区</li></ul><hr><h2 id="理想境界" tabindex="-1"><a class="header-anchor" href="#理想境界" aria-hidden="true">#</a> 理想境界</h2><ul><li>类型：智能硬件、显示技术</li><li>地址：成都市武侯区天府软件园A区</li><li>网址：http://www.idealsee.com/home</li></ul><hr><h2 id="咕-咚" tabindex="-1"><a class="header-anchor" href="#咕-咚" aria-hidden="true">#</a> 咕 咚</h2><ul><li>类型：移动互联网</li><li>地址：成都市武侯区天府软件园D区</li><li>网址：https://www.codoon.com/</li></ul><hr><h2 id="百词斩" tabindex="-1"><a class="header-anchor" href="#百词斩" aria-hidden="true">#</a> 百词斩</h2><ul><li>类型：教育、移动互联网</li><li>地址：成都市武侯区天府五街天府软件园E区</li><li>网址：http://www.baicizhan.com/</li></ul><hr><h2 id="鲁大师" tabindex="-1"><a class="header-anchor" href="#鲁大师" aria-hidden="true">#</a> 鲁大师</h2><ul><li>类型：工具、移动互联网</li><li>地址：成都市武侯区天府软件园E区</li><li>网址：https://www.ludashi.com/</li></ul><hr><h2 id="优客逸家" tabindex="-1"><a class="header-anchor" href="#优客逸家" aria-hidden="true">#</a> 优客逸家</h2><ul><li>类型：租房、移动互联网</li><li>地址：成都市武侯区无国界26栋</li><li>网址：http://www.uoko.com/</li></ul><hr><h2 id="testbird" tabindex="-1"><a class="header-anchor" href="#testbird" aria-hidden="true">#</a> TestBird</h2><ul><li>类型：企业服务、移动互联网</li><li>地址：成都市武侯区天府软件园C区</li><li>网址：https://www.testbird.com/</li></ul><hr><h2 id="实验楼" tabindex="-1"><a class="header-anchor" href="#实验楼" aria-hidden="true">#</a> 实验楼</h2><ul><li>类型：在线教育</li><li>地址：成都市武侯区天府软件园E区</li><li>网址：http://www.shiyanlou.com</li></ul><hr><h2 id="西瓜创客" tabindex="-1"><a class="header-anchor" href="#西瓜创客" aria-hidden="true">#</a> 西瓜创客</h2><ul><li>类型：教育、少儿编程</li><li>地址：成都市武侯区OCG国际中心A座</li><li>网址：https://www.xiguacity.cn/</li></ul><hr><h2 id="医联" tabindex="-1"><a class="header-anchor" href="#医联" aria-hidden="true">#</a> 医联</h2><ul><li>类型：医疗、移动互联网</li><li>地址：成都市武侯区天府软件园B区</li><li>网址：https://www.medlinker.com/join/hr</li></ul><hr><h2 id="camera360" tabindex="-1"><a class="header-anchor" href="#camera360" aria-hidden="true">#</a> Camera360</h2><ul><li>类型：移动影像</li><li>地址：成都市高新区天府软件园E区</li><li>网址：http://hr.camera360.com/</li></ul><hr><h2 id="小鸡叫叫" tabindex="-1"><a class="header-anchor" href="#小鸡叫叫" aria-hidden="true">#</a> 小鸡叫叫</h2><ul><li>类型：在线教育、移动互联网</li><li>地址：成都市武侯区皇庭国际A座</li><li>网址：https://www.jojoreading.com/</li></ul><hr><h2 id="摹客" tabindex="-1"><a class="header-anchor" href="#摹客" aria-hidden="true">#</a> 摹客</h2><ul><li>类型：工具、移动互联网</li><li>代表产品：Mockplus、摹客</li><li>地址：成都市双流区双兴大道1号电子科技园16栋</li><li>网址：https://www.mockplus.cn/</li></ul><hr><h2 id="美洽科技" tabindex="-1"><a class="header-anchor" href="#美洽科技" aria-hidden="true">#</a> 美洽科技</h2><ul><li>类型：智能客服、企业服务</li><li>地址：成都市武侯区希顿国际B座</li><li>网址：https://meiqia.com/about#joinus</li></ul><hr><h2 id="tap4fun" tabindex="-1"><a class="header-anchor" href="#tap4fun" aria-hidden="true">#</a> tap4fun</h2><ul><li>类型：游戏、手游</li><li>地址：成都市武侯区天府软件园A区</li><li>网址：https://www.tap4fun.com/</li></ul><hr><h2 id="知道创宇" tabindex="-1"><a class="header-anchor" href="#知道创宇" aria-hidden="true">#</a> 知道创宇</h2><ul><li>类型：信息安全</li><li>地址：成都市武侯区腾讯大厦B座</li><li>网址：https://www.knownsec.com/#/jobs</li></ul><hr><h2 id="梦工厂" tabindex="-1"><a class="header-anchor" href="#梦工厂" aria-hidden="true">#</a> 梦工厂</h2><ul><li>类型：游戏</li><li>地址：成都市锦江区三色路38号博瑞创意成都</li><li>网址：http://www.dreamwork.cn/join.html</li></ul><hr><h2 id="其他" tabindex="-1"><a class="header-anchor" href="#其他" aria-hidden="true">#</a> 其他</h2><ul><li><p>移花互动</p></li><li><p>盛大</p></li><li><p>抹茶美妆</p></li><li><p>咪咕音乐</p></li><li><p>速递易</p></li><li><p>Tower</p></li><li><p>客如云</p></li><li><p>番茄来了</p></li><li><p>三七互娱</p></li><li><p>理想生活实验室</p></li><li><p>鱼说科技</p></li><li><p>铁皮人科技</p></li><li><p>小娱wifi</p></li><li><p>极企</p></li><li><p>货车帮</p></li><li><p>麦麦养老</p></li><li><p>活动家</p></li><li><p>杂志铺</p></li><li><p>麦客</p></li><li><p>文轩网</p></li><li><p>...等等</p></li></ul><hr><p>最后，由于了解有限，难免会有疏漏和不当，小伙伴们可以留言补充，众人拾柴火焰高！</p><blockquote><p>链接：<a href="https://mp.weixin.qq.com/s/eaX9QhLwy_VsGIH0apA4qw" target="_blank" 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class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="OPPO（成都）"><!---->OPPO（成都）<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/chengdu.html#爱奇艺-成都" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="爱奇艺（成都）"><!---->爱奇艺（成都）<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/chengdu.html#携程成都研发中心" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="携程成都研发中心"><!---->携程成都研发中心<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/chengdu.html#商汤科技-成都" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="商汤科技（成都）"><!---->商汤科技（成都）<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/chengdu.html#京东成都研发中心" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="京东成都研发中心"><!---->京东成都研发中心<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/chengdu.html#科大讯飞-成都" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="科大讯飞（成都）"><!---->科大讯飞（成都）<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/chengdu.html#thoughtworks-成都" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="ThoughtWorks（成都）"><!---->ThoughtWorks（成都）<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/chengdu.html#garmin佳明" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="GARMIN佳明"><!---->GARMIN佳明<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/chengdu.html#极米科技" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="极米科技"><!---->极米科技<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/chengdu.html#聚美优品" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="聚美优品"><!---->聚美优品<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/chengdu.html#锤子科技-忽略" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="锤子科技（忽略）"><!---->锤子科技（忽略）<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/chengdu.html#完美世界-成都" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="完美世界（成都）"><!---->完美世界（成都）<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/chengdu.html#多益网络-成都" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="多益网络（成都）"><!---->多益网络（成都）<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/chengdu.html#当乐网" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="当乐网"><!---->当乐网<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/chengdu.html#实习僧" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="实习僧"><!---->实习僧<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/chengdu.html#迅游网络" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="迅游网络"><!---->迅游网络<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/chengdu.html#趣乐多" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="趣乐多"><!---->趣乐多<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/chengdu.html#理想境界" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="理想境界"><!---->理想境界<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/chengdu.html#咕-咚" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="咕 咚"><!---->咕 咚<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/chengdu.html#百词斩" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="百词斩"><!---->百词斩<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/chengdu.html#鲁大师" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="鲁大师"><!---->鲁大师<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/chengdu.html#优客逸家" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="优客逸家"><!---->优客逸家<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/chengdu.html#testbird" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="TestBird"><!---->TestBird<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/chengdu.html#实验楼" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="实验楼"><!---->实验楼<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/chengdu.html#西瓜创客" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="西瓜创客"><!---->西瓜创客<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/chengdu.html#医联" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="医联"><!---->医联<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/chengdu.html#camera360" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="Camera360"><!---->Camera360<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/chengdu.html#小鸡叫叫" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="小鸡叫叫"><!---->小鸡叫叫<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/chengdu.html#摹客" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="摹客"><!---->摹客<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/chengdu.html#美洽科技" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="美洽科技"><!---->美洽科技<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/chengdu.html#tap4fun" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="tap4fun"><!---->tap4fun<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/chengdu.html#知道创宇" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="知道创宇"><!---->知道创宇<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/chengdu.html#梦工厂" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="梦工厂"><!---->梦工厂<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/chengdu.html#其他" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="其他"><!---->其他<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/cityselect/guangzhou.html" class="nav-link sidebar-link sidebar-page" aria-label="广州"><!---->广州<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/hangzhou.html" class="nav-link sidebar-link sidebar-page" aria-label="杭州"><!---->杭州<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/nanjing.html" class="nav-link sidebar-link sidebar-page" aria-label="南京"><!---->南京<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/qingdao.html" class="nav-link sidebar-link sidebar-page" aria-label="青岛"><!---->青岛<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/shenzhen.html" class="nav-link sidebar-link sidebar-page" aria-label="深圳"><!---->深圳<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/suzhou.html" class="nav-link sidebar-link sidebar-page" aria-label="苏州"><!---->苏州<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/xian.html" class="nav-link sidebar-link sidebar-page" aria-label="西安"><!---->西安<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/zhengzhou.html" class="nav-link sidebar-link sidebar-page" aria-label="郑州"><!---->郑州<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/jinan.html" class="nav-link sidebar-link sidebar-page" aria-label="济南"><!---->济南<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->成都都有哪些值得加入的IT互联网公司？</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月27日</span><meta property="datePublished" content="2022-03-27T08:36:50.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category4" role>求职面试</li><meta property="articleSection" content="求职面试"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>城市选择</li></ul><meta property="keywords" content="城市选择"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 6 分钟</span><meta property="timeRequired" content="PT6M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/chengdu.html#华为成研所" class="router-link-active router-link-exact-active toc-link level2">华为成研所</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/chengdu.html#腾讯成都研发中心" class="router-link-active router-link-exact-active toc-link level2">腾讯成都研发中心</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/chengdu.html#蚂蚁金服-成都" class="router-link-active router-link-exact-active toc-link level2">蚂蚁金服（成都）</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/chengdu.html#字节跳动成都研发中心" class="router-link-active router-link-exact-active toc-link level2">字节跳动成都研发中心</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/chengdu.html#美团成都研发中心" class="router-link-active router-link-exact-active toc-link level2">美团成都研发中心</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/chengdu.html#滴滴成都研发中心" class="router-link-active router-link-exact-active toc-link level2">滴滴成都研发中心</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/chengdu.html#新浪微博成都研发中心" class="router-link-active router-link-exact-active 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level2">商汤科技（成都）</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/chengdu.html#京东成都研发中心" class="router-link-active router-link-exact-active toc-link level2">京东成都研发中心</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/chengdu.html#科大讯飞-成都" class="router-link-active router-link-exact-active toc-link level2">科大讯飞（成都）</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/chengdu.html#thoughtworks-成都" class="router-link-active router-link-exact-active toc-link level2">ThoughtWorks（成都）</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/chengdu.html#garmin佳明" class="router-link-active router-link-exact-active toc-link level2">GARMIN佳明</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/chengdu.html#极米科技" class="router-link-active router-link-exact-active toc-link 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class="toc-item"><a aria-current="page" href="/cityselect/chengdu.html#实习僧" class="router-link-active router-link-exact-active toc-link level2">实习僧</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/chengdu.html#迅游网络" class="router-link-active router-link-exact-active toc-link level2">迅游网络</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/chengdu.html#趣乐多" class="router-link-active router-link-exact-active toc-link level2">趣乐多</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/chengdu.html#理想境界" class="router-link-active router-link-exact-active toc-link level2">理想境界</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/chengdu.html#咕-咚" class="router-link-active router-link-exact-active toc-link level2">咕 咚</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/chengdu.html#百词斩" class="router-link-active router-link-exact-active toc-link level2">百词斩</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/chengdu.html#鲁大师" class="router-link-active router-link-exact-active toc-link level2">鲁大师</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/chengdu.html#优客逸家" class="router-link-active router-link-exact-active toc-link level2">优客逸家</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/chengdu.html#testbird" class="router-link-active router-link-exact-active toc-link level2">TestBird</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/chengdu.html#实验楼" class="router-link-active router-link-exact-active toc-link level2">实验楼</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/chengdu.html#西瓜创客" class="router-link-active router-link-exact-active toc-link level2">西瓜创客</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/chengdu.html#医联" class="router-link-active router-link-exact-active toc-link level2">医联</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/chengdu.html#camera360" class="router-link-active router-link-exact-active toc-link level2">Camera360</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/chengdu.html#小鸡叫叫" class="router-link-active router-link-exact-active toc-link level2">小鸡叫叫</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/chengdu.html#摹客" class="router-link-active router-link-exact-active toc-link level2">摹客</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/chengdu.html#美洽科技" class="router-link-active router-link-exact-active toc-link level2">美洽科技</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/chengdu.html#tap4fun" class="router-link-active router-link-exact-active toc-link level2">tap4fun</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/chengdu.html#知道创宇" class="router-link-active router-link-exact-active toc-link level2">知道创宇</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/chengdu.html#梦工厂" class="router-link-active router-link-exact-active toc-link level2">梦工厂</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/chengdu.html#其他" class="router-link-active router-link-exact-active toc-link level2">其他</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="成都都有哪些值得加入的it互联网公司" tabindex="-1"><a class="header-anchor" href="#成都都有哪些值得加入的it互联网公司" aria-hidden="true">#</a> 成都都有哪些值得加入的IT互联网公司？</h1><p>今天应小伙伴们的要求，再来聊一聊美丽的<strong>四川省成都市</strong>有哪些酷酷的IT/技术类公司（不仅仅局限于纯互联网）。</p><p>成都别称蓉城，是西部地区重要的中心城市，自古就有“天府之国”的美誉。赵雷的一曲《成都》，把蓉城街头的休闲慢悠与自在气息勾勒得淋漓尽致，闭上眼，仿佛我也置身于玉林路的小酒馆门口。虽然我本人从未去过成都，但早有耳闻那是一座来了便不想走了的城市，所以有机会一定要去成都的街头走一走。</p><p>好啦，扯得有点远了，接下来回归正题。注意，我们这里只列举，不作过多评论，且排名不分先后，总结得不一定完全准确，小伙伴们有补充的可以留言，众人拾柴火焰高嘛。</p><p>都说成都的互联网氛围相当浓厚，接下来直接上菜看看吧！</p><blockquote><p>注：本文特别鸣谢昵称「sky小喵」的成都小伙伴提供的整理和帮助。</p></blockquote><hr><h2 id="华为成研所" tabindex="-1"><a class="header-anchor" href="#华为成研所" aria-hidden="true">#</a> 华为成研所</h2><ul><li>类型：通信设备商</li><li>地址：成都市郫都区西源大道成都华为研究所</li><li>网址：https://career.huawei.com/</li></ul><hr><h2 id="腾讯成都研发中心" tabindex="-1"><a class="header-anchor" href="#腾讯成都研发中心" aria-hidden="true">#</a> 腾讯成都研发中心</h2><ul><li>类型：社交、互联网</li><li>地址：成都市武侯区天府三街腾讯大厦</li><li>网址：https://careers.tencent.com/</li></ul><hr><h2 id="蚂蚁金服-成都" tabindex="-1"><a class="header-anchor" href="#蚂蚁金服-成都" aria-hidden="true">#</a> 蚂蚁金服（成都）</h2><ul><li>类型：电商、互联网</li><li>地址：成都市武侯区蚂蚁C空间</li><li>网址：https://campus.alibaba.com/</li></ul><hr><h2 id="字节跳动成都研发中心" tabindex="-1"><a class="header-anchor" href="#字节跳动成都研发中心" aria-hidden="true">#</a> 字节跳动成都研发中心</h2><ul><li>类型：互联网</li><li>地址：成都市武侯区OCG国际中心</li><li>网址：https://jobs.bytedance.com/</li></ul><hr><h2 id="美团成都研发中心" tabindex="-1"><a class="header-anchor" href="#美团成都研发中心" aria-hidden="true">#</a> 美团成都研发中心</h2><ul><li>类型：互联网</li><li>地址：成都市天府一街两江国际A座</li><li>网址：https://campus.meituan.com/</li></ul><hr><h2 id="滴滴成都研发中心" tabindex="-1"><a class="header-anchor" href="#滴滴成都研发中心" aria-hidden="true">#</a> 滴滴成都研发中心</h2><ul><li>类型：出行、互联网</li><li>地址：成都市锦江区天府国际大厦</li><li>网址：https://talent.didiglobal.com/</li></ul><hr><h2 id="新浪微博成都研发中心" tabindex="-1"><a class="header-anchor" href="#新浪微博成都研发中心" aria-hidden="true">#</a> 新浪微博成都研发中心</h2><ul><li>类型：互联网</li><li>地址：成都市武侯区天府软件园C区</li><li>网址：https://career.sina.com.cn/</li></ul><hr><h2 id="中兴成都研发中心" tabindex="-1"><a class="header-anchor" href="#中兴成都研发中心" aria-hidden="true">#</a> 中兴成都研发中心</h2><ul><li>类型：通信设备商</li><li>地址：成都市武侯区中兴通讯大厦</li><li>网址：http://job.zte.com.cn/</li></ul><hr><h2 id="oppo-成都" tabindex="-1"><a class="header-anchor" href="#oppo-成都" aria-hidden="true">#</a> OPPO（成都）</h2><ul><li>类型：通信、硬件、移动互联网</li><li>地址：成都市武侯区OCG国际中心</li><li>网址：http://oppo.zhaopin.com/</li></ul><hr><h2 id="爱奇艺-成都" tabindex="-1"><a class="header-anchor" href="#爱奇艺-成都" aria-hidden="true">#</a> 爱奇艺（成都）</h2><ul><li>类型：视频、互联网</li><li>地址：成都市武侯区天府软件园E区</li><li>网址：https://careers.iqiyi.com/</li></ul><hr><h2 id="携程成都研发中心" tabindex="-1"><a class="header-anchor" href="#携程成都研发中心" aria-hidden="true">#</a> 携程成都研发中心</h2><ul><li>类型：互联网</li><li>地址：成都市武侯区天府四街携程大厦</li><li>网址：https://careers.ctrip.com/index.html#/</li></ul><hr><h2 id="商汤科技-成都" tabindex="-1"><a class="header-anchor" href="#商汤科技-成都" aria-hidden="true">#</a> 商汤科技（成都）</h2><ul><li>类型：人工智能</li><li>地址：成都市天府新区天府箐容中心</li><li>网址：https://www.sensetime.com/cn/join-index</li></ul><hr><h2 id="京东成都研发中心" tabindex="-1"><a class="header-anchor" href="#京东成都研发中心" aria-hidden="true">#</a> 京东成都研发中心</h2><ul><li>类型：电商、互联网</li><li>地址：成都市武侯区武兴三路西部智谷D区</li><li>网址：https://about.jd.com/zhaopin/</li></ul><hr><h2 id="科大讯飞-成都" tabindex="-1"><a class="header-anchor" href="#科大讯飞-成都" aria-hidden="true">#</a> 科大讯飞（成都）</h2><ul><li>类型：人工智能、数据服务</li><li>地址：成都市天府新区菁蓉中心A区</li><li>网址：https://candidate.iflytek.com/</li></ul><hr><h2 id="thoughtworks-成都" tabindex="-1"><a class="header-anchor" href="#thoughtworks-成都" aria-hidden="true">#</a> ThoughtWorks（成都）</h2><ul><li>类型：企业服务、信息安全</li><li>地址：成都市武侯区天府软件园E区</li><li>网址：https://www.thoughtworks.com</li></ul><hr><h2 id="garmin佳明" tabindex="-1"><a class="header-anchor" href="#garmin佳明" aria-hidden="true">#</a> GARMIN佳明</h2><ul><li>类型：通讯电子，智能硬件</li><li>地址：成都市武侯区天府软件园C区</li><li>网址：https://www.garmin.com.cn/job/</li></ul><hr><h2 id="极米科技" tabindex="-1"><a class="header-anchor" href="#极米科技" aria-hidden="true">#</a> 极米科技</h2><ul><li>类型：硬件、电商</li><li>地址：成都市武侯区天府软件园A区</li><li>网址：https://www.xgimi.com/</li></ul><hr><h2 id="聚美优品" tabindex="-1"><a class="header-anchor" href="#聚美优品" aria-hidden="true">#</a> 聚美优品</h2><ul><li>类型：电商</li><li>地址：成都市武侯区天府软件园G区</li><li>网址：http://www.jumei.com</li></ul><hr><h2 id="锤子科技-忽略" tabindex="-1"><a class="header-anchor" href="#锤子科技-忽略" aria-hidden="true">#</a> 锤子科技（忽略）</h2><ul><li>类型：硬件、移动互联网</li><li>地址：成都市成华区龙潭工业园</li><li>网址：https://www.smartisan.com/support/#/join</li></ul><hr><h2 id="完美世界-成都" tabindex="-1"><a class="header-anchor" href="#完美世界-成都" aria-hidden="true">#</a> 完美世界（成都）</h2><ul><li>类型：游戏、移动互联网</li><li>地址：成都市武侯区天府软件园C区完美世界大楼</li><li>网址：http://jobs.wanmei.com/</li></ul><hr><h2 id="多益网络-成都" tabindex="-1"><a class="header-anchor" href="#多益网络-成都" aria-hidden="true">#</a> 多益网络（成都）</h2><ul><li>类型：游戏、移动互联网</li><li>地址：成都市武侯区天府软件园G区</li><li>网址：https://xz.duoyi.com/</li></ul><hr><h2 id="当乐网" tabindex="-1"><a class="header-anchor" href="#当乐网" aria-hidden="true">#</a> 当乐网</h2><ul><li>类型：游戏、移动互联网</li><li>地址：成都市高新区天府软件园E区1号楼</li><li>网址：https://www.d.cn/hr/</li></ul><hr><h2 id="实习僧" tabindex="-1"><a class="header-anchor" href="#实习僧" aria-hidden="true">#</a> 实习僧</h2><ul><li>类型：招聘、企业服务</li><li>地址：成都市武侯区天府五街软件园G区7栋</li><li>网址：https://www.shixiseng.com/tc/normal/mx2021</li></ul><hr><h2 id="迅游网络" tabindex="-1"><a class="header-anchor" href="#迅游网络" aria-hidden="true">#</a> 迅游网络</h2><ul><li>类型：游戏</li><li>地址：成都市武侯区天府软件园D区</li><li>网址：http://www.xunyou.com/hr/</li></ul><hr><h2 id="趣乐多" tabindex="-1"><a class="header-anchor" href="#趣乐多" aria-hidden="true">#</a> 趣乐多</h2><ul><li>类型：游戏</li><li>地址：成都市武侯区天府软件园C区</li></ul><hr><h2 id="理想境界" tabindex="-1"><a class="header-anchor" href="#理想境界" aria-hidden="true">#</a> 理想境界</h2><ul><li>类型：智能硬件、显示技术</li><li>地址：成都市武侯区天府软件园A区</li><li>网址：http://www.idealsee.com/home</li></ul><hr><h2 id="咕-咚" tabindex="-1"><a class="header-anchor" href="#咕-咚" aria-hidden="true">#</a> 咕 咚</h2><ul><li>类型：移动互联网</li><li>地址：成都市武侯区天府软件园D区</li><li>网址：https://www.codoon.com/</li></ul><hr><h2 id="百词斩" tabindex="-1"><a class="header-anchor" href="#百词斩" aria-hidden="true">#</a> 百词斩</h2><ul><li>类型：教育、移动互联网</li><li>地址：成都市武侯区天府五街天府软件园E区</li><li>网址：http://www.baicizhan.com/</li></ul><hr><h2 id="鲁大师" tabindex="-1"><a class="header-anchor" href="#鲁大师" aria-hidden="true">#</a> 鲁大师</h2><ul><li>类型：工具、移动互联网</li><li>地址：成都市武侯区天府软件园E区</li><li>网址：https://www.ludashi.com/</li></ul><hr><h2 id="优客逸家" tabindex="-1"><a class="header-anchor" href="#优客逸家" aria-hidden="true">#</a> 优客逸家</h2><ul><li>类型：租房、移动互联网</li><li>地址：成都市武侯区无国界26栋</li><li>网址：http://www.uoko.com/</li></ul><hr><h2 id="testbird" tabindex="-1"><a class="header-anchor" href="#testbird" aria-hidden="true">#</a> TestBird</h2><ul><li>类型：企业服务、移动互联网</li><li>地址：成都市武侯区天府软件园C区</li><li>网址：https://www.testbird.com/</li></ul><hr><h2 id="实验楼" tabindex="-1"><a class="header-anchor" href="#实验楼" aria-hidden="true">#</a> 实验楼</h2><ul><li>类型：在线教育</li><li>地址：成都市武侯区天府软件园E区</li><li>网址：http://www.shiyanlou.com</li></ul><hr><h2 id="西瓜创客" tabindex="-1"><a class="header-anchor" href="#西瓜创客" aria-hidden="true">#</a> 西瓜创客</h2><ul><li>类型：教育、少儿编程</li><li>地址：成都市武侯区OCG国际中心A座</li><li>网址：https://www.xiguacity.cn/</li></ul><hr><h2 id="医联" tabindex="-1"><a class="header-anchor" href="#医联" aria-hidden="true">#</a> 医联</h2><ul><li>类型：医疗、移动互联网</li><li>地址：成都市武侯区天府软件园B区</li><li>网址：https://www.medlinker.com/join/hr</li></ul><hr><h2 id="camera360" tabindex="-1"><a class="header-anchor" href="#camera360" aria-hidden="true">#</a> Camera360</h2><ul><li>类型：移动影像</li><li>地址：成都市高新区天府软件园E区</li><li>网址：http://hr.camera360.com/</li></ul><hr><h2 id="小鸡叫叫" tabindex="-1"><a class="header-anchor" href="#小鸡叫叫" aria-hidden="true">#</a> 小鸡叫叫</h2><ul><li>类型：在线教育、移动互联网</li><li>地址：成都市武侯区皇庭国际A座</li><li>网址：https://www.jojoreading.com/</li></ul><hr><h2 id="摹客" tabindex="-1"><a class="header-anchor" href="#摹客" aria-hidden="true">#</a> 摹客</h2><ul><li>类型：工具、移动互联网</li><li>代表产品：Mockplus、摹客</li><li>地址：成都市双流区双兴大道1号电子科技园16栋</li><li>网址：https://www.mockplus.cn/</li></ul><hr><h2 id="美洽科技" tabindex="-1"><a class="header-anchor" href="#美洽科技" aria-hidden="true">#</a> 美洽科技</h2><ul><li>类型：智能客服、企业服务</li><li>地址：成都市武侯区希顿国际B座</li><li>网址：https://meiqia.com/about#joinus</li></ul><hr><h2 id="tap4fun" tabindex="-1"><a class="header-anchor" href="#tap4fun" aria-hidden="true">#</a> tap4fun</h2><ul><li>类型：游戏、手游</li><li>地址：成都市武侯区天府软件园A区</li><li>网址：https://www.tap4fun.com/</li></ul><hr><h2 id="知道创宇" tabindex="-1"><a class="header-anchor" href="#知道创宇" aria-hidden="true">#</a> 知道创宇</h2><ul><li>类型：信息安全</li><li>地址：成都市武侯区腾讯大厦B座</li><li>网址：https://www.knownsec.com/#/jobs</li></ul><hr><h2 id="梦工厂" tabindex="-1"><a class="header-anchor" href="#梦工厂" aria-hidden="true">#</a> 梦工厂</h2><ul><li>类型：游戏</li><li>地址：成都市锦江区三色路38号博瑞创意成都</li><li>网址：http://www.dreamwork.cn/join.html</li></ul><hr><h2 id="其他" tabindex="-1"><a class="header-anchor" href="#其他" aria-hidden="true">#</a> 其他</h2><ul><li><p>移花互动</p></li><li><p>盛大</p></li><li><p>抹茶美妆</p></li><li><p>咪咕音乐</p></li><li><p>速递易</p></li><li><p>Tower</p></li><li><p>客如云</p></li><li><p>番茄来了</p></li><li><p>三七互娱</p></li><li><p>理想生活实验室</p></li><li><p>鱼说科技</p></li><li><p>铁皮人科技</p></li><li><p>小娱wifi</p></li><li><p>极企</p></li><li><p>货车帮</p></li><li><p>麦麦养老</p></li><li><p>活动家</p></li><li><p>杂志铺</p></li><li><p>麦客</p></li><li><p>文轩网</p></li><li><p>...等等</p></li></ul><hr><p>最后，由于了解有限，难免会有疏漏和不当，小伙伴们可以留言补充，众人拾柴火焰高！</p><blockquote><p>链接：<a href="https://mp.weixin.qq.com/s/eaX9QhLwy_VsGIH0apA4qw" target="_blank" rel="noopener noreferrer">https://mp.weixin.qq.com/s/eaX9QhLwy_VsGIH0apA4qw<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" 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aria-label="成都有哪些牛批的互联网公司？"><!---->成都有哪些牛批的互联网公司？<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/cityselect/guangzhou.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="想去广州了！"><!---->想去广州了！<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/guangzhou.html#工作机会" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="工作机会"><!---->工作机会<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/guangzhou.html#互联网公司" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="互联网公司"><!---->互联网公司<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/guangzhou.html#运营商" class="router-link-active 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class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="教育"><!---->教育<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/guangzhou.html#医疗" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="医疗"><!---->医疗<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/guangzhou.html#风景-美食" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="风景&amp;美食"><!---->风景&amp;美食<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li></ul><!--]--></li><li><!--[--><a href="/cityselect/hangzhou.html" class="nav-link sidebar-link sidebar-page" aria-label="杭州有哪些顶级的互联网公司？"><!---->杭州有哪些顶级的互联网公司？<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/nanjing.html" class="nav-link sidebar-link sidebar-page" aria-label="南京有哪些靠谱的互联网公司？"><!---->南京有哪些靠谱的互联网公司？<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/qingdao.html" class="nav-link sidebar-link sidebar-page" aria-label="青岛有牛逼的互联网公司吗？"><!---->青岛有牛逼的互联网公司吗？<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/shenzhen.html" class="nav-link sidebar-link sidebar-page" aria-label="深圳有哪些牛批的互联网公司？"><!---->深圳有哪些牛批的互联网公司？<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/suzhou.html" class="nav-link sidebar-link sidebar-page" aria-label="想搬去苏州生活了。。"><!---->想搬去苏州生活了。。<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/xian.html" class="nav-link sidebar-link sidebar-page" aria-label="西安有哪些不错的互联网公司？"><!---->西安有哪些不错的互联网公司？<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/zhengzhou.html" class="nav-link sidebar-link sidebar-page" aria-label="郑州有哪些不错的互联网公司？"><!---->郑州有哪些不错的互联网公司？<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->想去广州了！</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月27日</span><meta property="datePublished" content="2022-03-27T08:36:50.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category4" role>求职面试</li><meta property="articleSection" content="求职面试"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>城市选择</li></ul><meta property="keywords" content="城市选择"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 9 分钟</span><meta property="timeRequired" content="PT9M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/guangzhou.html#工作机会" class="router-link-active router-link-exact-active toc-link level2">工作机会</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/guangzhou.html#互联网公司" class="router-link-active router-link-exact-active toc-link level3">互联网公司</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/guangzhou.html#运营商" class="router-link-active router-link-exact-active toc-link level3">运营商</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/guangzhou.html#研究所" class="router-link-active router-link-exact-active toc-link level3">研究所</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/guangzhou.html#生活成本" class="router-link-active router-link-exact-active toc-link level2">生活成本</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/guangzhou.html#房价" class="router-link-active router-link-exact-active toc-link level3">房价</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/guangzhou.html#教育" class="router-link-active router-link-exact-active toc-link level3">教育</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/guangzhou.html#医疗" class="router-link-active router-link-exact-active toc-link level3">医疗</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/guangzhou.html#风景-美食" class="router-link-active router-link-exact-active toc-link level3">风景&amp;美食</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="想去广州了" tabindex="-1"><a class="header-anchor" href="#想去广州了" aria-hidden="true">#</a> 想去广州了！</h1><p>上次发完深圳的，发现广州的呼声比较高，于是我搞来了！</p><p>广州的互联网环境相对来说还不错。</p><p>广州的繁华以及它的魅力不用我多说，无论从人文还是从经济来说都是不虚其它城市的。不过我在面试时发现，广州除了几个头部大厂是统一薪资标准外，相较于其它一线城市，广州的互联网行业给我的感觉是整体薪资水平偏低。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-0f0eb358-f7ae-46b9-b070-8b93e401735e.png" alt=""></p><p>大家注意呀，其实学计算机相关专业的想在广州挣钱，不止可以通过互联网公司，也可以通过当公务员，教师等方式去挣钱呀。应届生考进体制内当公务员，年薪也20多万呢，并且各方面福利待遇绝对到位，相当不错了。下面我们还是分互联网公司以及国企央企研究所介绍吧。</p><p>声明一下，下面的内容仅代表我个人的调查结果，如果大家知道更多的信息，欢迎补充呀。</p><h2 id="工作机会" tabindex="-1"><a class="header-anchor" href="#工作机会" aria-hidden="true">#</a> 工作机会</h2><h3 id="互联网公司" tabindex="-1"><a class="header-anchor" href="#互联网公司" aria-hidden="true">#</a> 互联网公司</h3><p><strong>网易</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-53893155-f8cb-4bfe-b0b4-768c43c03862.png" alt=""></p><p>网易在广州主要是游戏部门。算是网易的核心业务了。注意，网易面试时候是散装的，网易互娱、网易雷火和网易互联网是分开招聘的，我当时投简历都是分开给他们投的，同样的简历我在网站上填了三次，累死。不过好处就是你有三次机会能进网易 ~ 注意，互娱、雷火、互联网的薪资方案也是不一样的。网易的薪资方案很复杂，这里面水太深，我感觉我有点把握不住~ 我知道有人拿到sp大概就是 25k * 16吧，还会有股票。网易食堂的伙食是真的好，大部分人去了工作一段时间都胖了。</p><p><strong>微信</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-f4e50c0c-5214-484a-b5e9-18a20a929745.png" alt=""></p><p>广州主要是腾讯的 wxg 事业群，也就是微信。wxg 事业群的效益非常好，能进 wxg 还是很棒的，不过面试难度也挺大的。腾讯去年校招的薪资分 17k，18.5k，20k，21.5k，23k 几个档次，hr说是应届生第一年保证18薪，不过第二年就不保证了哈。注意，腾讯开出的薪资是可以argue的，如果他给你的薪资不满意，你可以用其它offer跟腾讯的 hr argue 更高档次的薪资，有成功的。另外校招生还有签字费以及股票以及租房补贴。腾讯时不时送点小礼物，工作的舒适度还是不错的。</p><p><strong>字节跳动</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-a1c6a805-e7fe-450f-bd18-c24d760b60e7.png" alt=""></p><p>广州的字节整体上不如其它地方的字节加班严重，不过也要看部门，有的部门听说挺累的。字节之前一直是大小周，前不久刚刚宣布要取消大小周，有双休还是挺幸福的，就是要少挣不少钱了，看你是不是奋斗逼了。我看到21届字节校招的薪资主要是每月20k，22k，24k，26k，28k，30k不等。不过我看校招拿到广州这边offer的大部分是22k和24k的月薪，</p><p><strong>欢聚时代</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-7d47dd3b-924e-4af3-99e9-85c77dca3d45.png" alt=""></p><p>大家看到欢聚时代这个名称可能有点陌生，其实 YY 和 虎牙 都是欢聚时代的。欢聚时代的薪资水平我不清楚，我问了朋友也不清楚，我就去查校招薪水上的薪资爆料。有点迷呀，去年校招，开发方向的月薪14k、16k、18k 的都有，但是这算法薪资的爆料咋还直接就 27k 呢？这也差的太多了吧。有靠谱消息的老铁欢迎来补充。</p><p><strong>唯品会</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-bd501c3a-05ac-4a1e-a27c-7645dc6d8ab0.png" alt=""></p><p>唯品会算是广州本地的一霸了吧，唯品会的福利挺给力的，包三餐，双休，租房补贴。本科生开发的月薪主要集中在14k-16k。</p><p><strong>SHEIN</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-d805d3a7-a5b8-4e5a-a304-e59cac38baad.png" alt=""></p><p>这家公司我熟，我就给你们展开讲讲。这家公司最近势头很猛，做跨境电商的，主要卖女装。我在去年秋招初期还面试过这家公司，面试难度比较友好。首先是 hr 给我发了个笔试链接，让我几天内找个时间做了。通过笔试后，第一轮面试，面试了大概有 30 多分钟，主要问了项目以及面试八股文，没有让写代码，然后面试就通过了。第二轮面试，面试官随便问了两个八股文问题就开始聊理想了。第三轮面试好像是他们的 cto，问我高考数学考多少分 ~ 问我上学期间大概写了多少行代码~ 然后又聊了几句就跟我结束面试了。就给我 offer了。后续hr跟我谈薪的时候说他们加班少，工资是 16k * 14，我觉得工资有点少，就没接offer。</p><p><strong>三七互娱</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-b7f04bcf-684c-4c89-acb2-5dc8907284a8.png" alt=""></p><p>我了解到三七互娱后端岗位大部分是 PHP，本科生校招进来薪资大概是12k 左右吧，每年发 15个月的工资。在知乎上对三七互娱的讨论比较多，有黑点，每个部门的情况也不太一样，大家可以再去了解下呀。</p><p><strong>小鹏汽车</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-fbcfd7c0-79ad-48c5-ad67-471ff91666a5.png" alt=""></p><p>小鹏汽车最近风头正盛，应届生校招进来的工资基本在 16k 左右，每年15薪。小鹏汽车目前是大小周呀，工作强度还是比较大的。</p><p><strong>酷狗音乐</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-4e3962cb-109e-4f2d-a372-ba325444d415.png" alt=""></p><p>酷狗音乐是腾讯的这应该大家都知道，不过内部的薪资职级不是完全对齐的哈。酷狗的不同部门工作强度差别很大，有的闲的要死，有的忙的要死。选择部门时要注意。</p><p><strong>4399</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-6a8653f4-b840-4f46-af16-72fa00b9019b.png" alt=""></p><p>4399大家应该都不陌生，好多小游戏都是从小开始玩的，工资也在16k左右。</p><p>好了，我算看明白了。广州互联网这边除了几个头部大厂，做开发的应届生薪资差不多就是16k呀，感觉有点低。其它的在广州设点的互联网公司我直接列到下面啦，实在写不过来了，大家有兴趣的详细了解呀。</p><p>分别有：科大讯飞、TCL、小鹏汽车、荔枝FM、多益游戏、太平洋、UC、CVTE、小米（目前正在建设中）、华为（正在建设中）</p><h3 id="运营商" tabindex="-1"><a class="header-anchor" href="#运营商" aria-hidden="true">#</a> 运营商</h3><p>感觉待遇一般，就是比较轻松，追求轻松和稳定的可以看下。</p><p><strong>移动</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-66cca36c-656b-4e6e-9172-f68d79e78af9.png" alt=""></p><p>移动每月的工资很低，可能到手就五六千块钱，然后年底会一下再发五六万的年终奖，有时候会更多一些。据说 18 年效益好年底一下发了 8 万，19 年就拉跨了。</p><p><strong>联通</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-cc0cdb0f-034c-4a63-81f6-a17beed70b14.png" alt=""></p><p>转正后每月到手八九千，绩效好能到手一万左右。</p><p><strong>电信</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-ff7fd7ae-3bf8-4797-bf07-f9490da269b9.png" alt=""></p><p>我看到 offershow 上有做网络运维的爆料，入职第一年每月到手8.5k，年终发了3.5万。</p><h3 id="研究所" tabindex="-1"><a class="header-anchor" href="#研究所" aria-hidden="true">#</a> 研究所</h3><p><strong>工信部第五研究所（赛宝实验室）</strong></p><p>据我所知，工信部下属的研究所福利待遇各方面都是不错的、平台也很大。但是每个部门的情况也差距很大呀，去研究所一定要找到那种效益好的部门，选对了起飞，选不对就坑了。</p><p><strong>中电7所（广州通信研究所）</strong></p><p>我打听了一下，这个研究所工资待遇不高，也就是图个轻松了。</p><p>我找了下没找到航空航天类在广州的研究所。其它类型的研究所也会招计算机相关专业的，目前计算机专业是万金油，哪里也招，不过你进了重点不是放在计算机行业的研究所，技术上的发展肯定不太好。如果有比较好的研究所也欢迎补充呀。</p><h2 id="生活成本" tabindex="-1"><a class="header-anchor" href="#生活成本" aria-hidden="true">#</a> 生活成本</h2><h3 id="房价" tabindex="-1"><a class="header-anchor" href="#房价" aria-hidden="true">#</a> 房价</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-4b8f3cec-ca0d-4b39-9826-755cd2fe29b6.png" alt=""></p><p>大家直接看图，相比于其它一线城市房价算是便宜了。但是按照广州互联网的工资水平想在广州差不多的区域和地段买房，压力是很大的。</p><h3 id="教育" tabindex="-1"><a class="header-anchor" href="#教育" aria-hidden="true">#</a> 教育</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-75763e2a-3b9b-48e4-a5dc-b0308d60e98f.png" alt=""></p><p>广州的985大学有两所，分别是中山大学和华南理工，211也有两所是暨南大学以及华南师范大学，另外广州大学、广东工业大学等等也都不错。广州的高中也很给力，华南师范大学附属中学、广东实验中学、广东广雅中学、广州市执信中学、广州二中、六中等等学校都很不错。</p><h3 id="医疗" tabindex="-1"><a class="header-anchor" href="#医疗" aria-hidden="true">#</a> 医疗</h3><p>一线城市的医疗资源肯定是没问题的，我粗略数了一下，广州有不下40所三甲医院。我了解到顶级医疗资源主要有中山系、南方系、广中医系等等。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-5b5c6c29-cc79-4c0b-be57-b105babd0141.png" alt=""></p><h3 id="风景-美食" tabindex="-1"><a class="header-anchor" href="#风景-美食" aria-hidden="true">#</a> 风景&amp;美食</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-4dbf092b-e820-4114-8fd8-ab7e0ac59f8d.png" alt=""></p><p>广州的美景自然不用多说，另外空气质量也很好，说起空气质量，我这个北方人已经习惯冬天经常见不到太阳了。广州的美食也很多，白切鸡、煲仔饭和肠粉等等，还有很多我就不报菜名了，我在西安上学时食堂有个卖肠粉的窗口，我很爱吃，不过这个肠粉明显是本地化了。话说南北差异还是挺大的，我一个同学去广州上学，去洗澡带着搓澡巾，他的广州舍友都十分的好奇~ 当然广州的同学看我拍雪景也很好奇 ~ 还有一次实验室和厦门大学一起合作做项目，我和一个厦门大学的博士都要了一份豆腐脑，我加韭菜花，他加糖，我两面对面坐着都觉得对方的不能吃。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-1e3954bc-0b41-4302-851c-d07d382040cd.png" alt=""></p><blockquote><p>作者：大白，转载链接：<a href="https://mp.weixin.qq.com/s/uZQ8p0ytsQFXzt5ppzx6fA" target="_blank" rel="noopener noreferrer">https://mp.weixin.qq.com/s/uZQ8p0ytsQFXzt5ppzx6fA<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" 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clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">六、求职面试</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">面试题集合</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">背诵版八股文</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">城市选择</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/cityselect/beijing.html" class="nav-link sidebar-link sidebar-page" aria-label="北京"><!---->北京<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/chengdu.html" class="nav-link sidebar-link sidebar-page" aria-label="成都"><!---->成都<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/cityselect/guangzhou.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="广州"><!---->广州<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/guangzhou.html#工作机会" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="工作机会"><!---->工作机会<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/guangzhou.html#互联网公司" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="互联网公司"><!---->互联网公司<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/guangzhou.html#运营商" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="运营商"><!---->运营商<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/guangzhou.html#研究所" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="研究所"><!---->研究所<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/guangzhou.html#生活成本" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="生活成本"><!---->生活成本<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/guangzhou.html#房价" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="房价"><!---->房价<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/guangzhou.html#教育" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="教育"><!---->教育<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/guangzhou.html#医疗" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="医疗"><!---->医疗<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/guangzhou.html#风景-美食" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="风景&amp;美食"><!---->风景&amp;美食<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li></ul><!--]--></li><li><!--[--><a href="/cityselect/hangzhou.html" class="nav-link sidebar-link sidebar-page" aria-label="杭州"><!---->杭州<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/nanjing.html" class="nav-link sidebar-link sidebar-page" aria-label="南京"><!---->南京<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/qingdao.html" class="nav-link sidebar-link sidebar-page" aria-label="青岛"><!---->青岛<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/shenzhen.html" class="nav-link sidebar-link sidebar-page" aria-label="深圳"><!---->深圳<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/suzhou.html" class="nav-link sidebar-link sidebar-page" aria-label="苏州"><!---->苏州<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/xian.html" class="nav-link sidebar-link sidebar-page" aria-label="西安"><!---->西安<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/zhengzhou.html" class="nav-link sidebar-link sidebar-page" aria-label="郑州"><!---->郑州<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/jinan.html" class="nav-link sidebar-link sidebar-page" aria-label="济南"><!---->济南<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->广州都有哪些值得加入的IT互联网公司？</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 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33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月27日</span><meta property="datePublished" content="2022-03-27T08:36:50.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category4" role>求职面试</li><meta property="articleSection" content="求职面试"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>城市选择</li></ul><meta property="keywords" content="城市选择"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 9 分钟</span><meta property="timeRequired" content="PT9M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/guangzhou.html#工作机会" class="router-link-active router-link-exact-active toc-link level2">工作机会</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/guangzhou.html#互联网公司" class="router-link-active router-link-exact-active toc-link level3">互联网公司</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/guangzhou.html#运营商" class="router-link-active router-link-exact-active toc-link level3">运营商</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/guangzhou.html#研究所" class="router-link-active router-link-exact-active toc-link level3">研究所</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/guangzhou.html#生活成本" class="router-link-active router-link-exact-active toc-link level2">生活成本</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/guangzhou.html#房价" class="router-link-active router-link-exact-active toc-link level3">房价</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/guangzhou.html#教育" class="router-link-active router-link-exact-active toc-link level3">教育</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/guangzhou.html#医疗" class="router-link-active router-link-exact-active toc-link level3">医疗</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/guangzhou.html#风景-美食" class="router-link-active router-link-exact-active toc-link level3">风景&amp;美食</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="广州都有哪些值得加入的it互联网公司" tabindex="-1"><a class="header-anchor" href="#广州都有哪些值得加入的it互联网公司" aria-hidden="true">#</a> 广州都有哪些值得加入的IT互联网公司？</h1><p>上次发完深圳的，发现广州的呼声比较高，于是我搞来了！</p><p>广州的互联网环境相对来说还不错。</p><p>广州的繁华以及它的魅力不用我多说，无论从人文还是从经济来说都是不虚其它城市的。不过我在面试时发现，广州除了几个头部大厂是统一薪资标准外，相较于其它一线城市，广州的互联网行业给我的感觉是整体薪资水平偏低。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-0f0eb358-f7ae-46b9-b070-8b93e401735e.png" alt=""></p><p>大家注意呀，其实学计算机相关专业的想在广州挣钱，不止可以通过互联网公司，也可以通过当公务员，教师等方式去挣钱呀。应届生考进体制内当公务员，年薪也20多万呢，并且各方面福利待遇绝对到位，相当不错了。下面我们还是分互联网公司以及国企央企研究所介绍吧。</p><p>声明一下，下面的内容仅代表我个人的调查结果，如果大家知道更多的信息，欢迎补充呀。</p><h2 id="工作机会" tabindex="-1"><a class="header-anchor" href="#工作机会" aria-hidden="true">#</a> 工作机会</h2><h3 id="互联网公司" tabindex="-1"><a class="header-anchor" href="#互联网公司" aria-hidden="true">#</a> 互联网公司</h3><p><strong>网易</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-53893155-f8cb-4bfe-b0b4-768c43c03862.png" alt=""></p><p>网易在广州主要是游戏部门。算是网易的核心业务了。注意，网易面试时候是散装的，网易互娱、网易雷火和网易互联网是分开招聘的，我当时投简历都是分开给他们投的，同样的简历我在网站上填了三次，累死。不过好处就是你有三次机会能进网易 ~ 注意，互娱、雷火、互联网的薪资方案也是不一样的。网易的薪资方案很复杂，这里面水太深，我感觉我有点把握不住~ 我知道有人拿到sp大概就是 25k * 16吧，还会有股票。网易食堂的伙食是真的好，大部分人去了工作一段时间都胖了。</p><p><strong>微信</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-f4e50c0c-5214-484a-b5e9-18a20a929745.png" alt=""></p><p>广州主要是腾讯的 wxg 事业群，也就是微信。wxg 事业群的效益非常好，能进 wxg 还是很棒的，不过面试难度也挺大的。腾讯去年校招的薪资分 17k，18.5k，20k，21.5k，23k 几个档次，hr说是应届生第一年保证18薪，不过第二年就不保证了哈。注意，腾讯开出的薪资是可以argue的，如果他给你的薪资不满意，你可以用其它offer跟腾讯的 hr argue 更高档次的薪资，有成功的。另外校招生还有签字费以及股票以及租房补贴。腾讯时不时送点小礼物，工作的舒适度还是不错的。</p><p><strong>字节跳动</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-a1c6a805-e7fe-450f-bd18-c24d760b60e7.png" alt=""></p><p>广州的字节整体上不如其它地方的字节加班严重，不过也要看部门，有的部门听说挺累的。字节之前一直是大小周，前不久刚刚宣布要取消大小周，有双休还是挺幸福的，就是要少挣不少钱了，看你是不是奋斗逼了。我看到21届字节校招的薪资主要是每月20k，22k，24k，26k，28k，30k不等。不过我看校招拿到广州这边offer的大部分是22k和24k的月薪，</p><p><strong>欢聚时代</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-7d47dd3b-924e-4af3-99e9-85c77dca3d45.png" alt=""></p><p>大家看到欢聚时代这个名称可能有点陌生，其实 YY 和 虎牙 都是欢聚时代的。欢聚时代的薪资水平我不清楚，我问了朋友也不清楚，我就去查校招薪水上的薪资爆料。有点迷呀，去年校招，开发方向的月薪14k、16k、18k 的都有，但是这算法薪资的爆料咋还直接就 27k 呢？这也差的太多了吧。有靠谱消息的老铁欢迎来补充。</p><p><strong>唯品会</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-bd501c3a-05ac-4a1e-a27c-7645dc6d8ab0.png" alt=""></p><p>唯品会算是广州本地的一霸了吧，唯品会的福利挺给力的，包三餐，双休，租房补贴。本科生开发的月薪主要集中在14k-16k。</p><p><strong>SHEIN</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-d805d3a7-a5b8-4e5a-a304-e59cac38baad.png" alt=""></p><p>这家公司我熟，我就给你们展开讲讲。这家公司最近势头很猛，做跨境电商的，主要卖女装。我在去年秋招初期还面试过这家公司，面试难度比较友好。首先是 hr 给我发了个笔试链接，让我几天内找个时间做了。通过笔试后，第一轮面试，面试了大概有 30 多分钟，主要问了项目以及面试八股文，没有让写代码，然后面试就通过了。第二轮面试，面试官随便问了两个八股文问题就开始聊理想了。第三轮面试好像是他们的 cto，问我高考数学考多少分 ~ 问我上学期间大概写了多少行代码~ 然后又聊了几句就跟我结束面试了。就给我 offer了。后续hr跟我谈薪的时候说他们加班少，工资是 16k * 14，我觉得工资有点少，就没接offer。</p><p><strong>三七互娱</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-b7f04bcf-684c-4c89-acb2-5dc8907284a8.png" alt=""></p><p>我了解到三七互娱后端岗位大部分是 PHP，本科生校招进来薪资大概是12k 左右吧，每年发 15个月的工资。在知乎上对三七互娱的讨论比较多，有黑点，每个部门的情况也不太一样，大家可以再去了解下呀。</p><p><strong>小鹏汽车</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-fbcfd7c0-79ad-48c5-ad67-471ff91666a5.png" alt=""></p><p>小鹏汽车最近风头正盛，应届生校招进来的工资基本在 16k 左右，每年15薪。小鹏汽车目前是大小周呀，工作强度还是比较大的。</p><p><strong>酷狗音乐</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-4e3962cb-109e-4f2d-a372-ba325444d415.png" alt=""></p><p>酷狗音乐是腾讯的这应该大家都知道，不过内部的薪资职级不是完全对齐的哈。酷狗的不同部门工作强度差别很大，有的闲的要死，有的忙的要死。选择部门时要注意。</p><p><strong>4399</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-6a8653f4-b840-4f46-af16-72fa00b9019b.png" alt=""></p><p>4399大家应该都不陌生，好多小游戏都是从小开始玩的，工资也在16k左右。</p><p>好了，我算看明白了。广州互联网这边除了几个头部大厂，做开发的应届生薪资差不多就是16k呀，感觉有点低。其它的在广州设点的互联网公司我直接列到下面啦，实在写不过来了，大家有兴趣的详细了解呀。</p><p>分别有：科大讯飞、TCL、小鹏汽车、荔枝FM、多益游戏、太平洋、UC、CVTE、小米（目前正在建设中）、华为（正在建设中）</p><h3 id="运营商" tabindex="-1"><a class="header-anchor" href="#运营商" aria-hidden="true">#</a> 运营商</h3><p>感觉待遇一般，就是比较轻松，追求轻松和稳定的可以看下。</p><p><strong>移动</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-66cca36c-656b-4e6e-9172-f68d79e78af9.png" alt=""></p><p>移动每月的工资很低，可能到手就五六千块钱，然后年底会一下再发五六万的年终奖，有时候会更多一些。据说 18 年效益好年底一下发了 8 万，19 年就拉跨了。</p><p><strong>联通</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-cc0cdb0f-034c-4a63-81f6-a17beed70b14.png" alt=""></p><p>转正后每月到手八九千，绩效好能到手一万左右。</p><p><strong>电信</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-ff7fd7ae-3bf8-4797-bf07-f9490da269b9.png" alt=""></p><p>我看到 offershow 上有做网络运维的爆料，入职第一年每月到手8.5k，年终发了3.5万。</p><h3 id="研究所" tabindex="-1"><a class="header-anchor" href="#研究所" aria-hidden="true">#</a> 研究所</h3><p><strong>工信部第五研究所（赛宝实验室）</strong></p><p>据我所知，工信部下属的研究所福利待遇各方面都是不错的、平台也很大。但是每个部门的情况也差距很大呀，去研究所一定要找到那种效益好的部门，选对了起飞，选不对就坑了。</p><p><strong>中电7所（广州通信研究所）</strong></p><p>我打听了一下，这个研究所工资待遇不高，也就是图个轻松了。</p><p>我找了下没找到航空航天类在广州的研究所。其它类型的研究所也会招计算机相关专业的，目前计算机专业是万金油，哪里也招，不过你进了重点不是放在计算机行业的研究所，技术上的发展肯定不太好。如果有比较好的研究所也欢迎补充呀。</p><h2 id="生活成本" tabindex="-1"><a class="header-anchor" href="#生活成本" aria-hidden="true">#</a> 生活成本</h2><h3 id="房价" tabindex="-1"><a class="header-anchor" href="#房价" aria-hidden="true">#</a> 房价</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-4b8f3cec-ca0d-4b39-9826-755cd2fe29b6.png" alt=""></p><p>大家直接看图，相比于其它一线城市房价算是便宜了。但是按照广州互联网的工资水平想在广州差不多的区域和地段买房，压力是很大的。</p><h3 id="教育" tabindex="-1"><a class="header-anchor" href="#教育" aria-hidden="true">#</a> 教育</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-75763e2a-3b9b-48e4-a5dc-b0308d60e98f.png" alt=""></p><p>广州的985大学有两所，分别是中山大学和华南理工，211也有两所是暨南大学以及华南师范大学，另外广州大学、广东工业大学等等也都不错。广州的高中也很给力，华南师范大学附属中学、广东实验中学、广东广雅中学、广州市执信中学、广州二中、六中等等学校都很不错。</p><h3 id="医疗" tabindex="-1"><a class="header-anchor" href="#医疗" aria-hidden="true">#</a> 医疗</h3><p>一线城市的医疗资源肯定是没问题的，我粗略数了一下，广州有不下40所三甲医院。我了解到顶级医疗资源主要有中山系、南方系、广中医系等等。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-5b5c6c29-cc79-4c0b-be57-b105babd0141.png" alt=""></p><h3 id="风景-美食" tabindex="-1"><a class="header-anchor" href="#风景-美食" aria-hidden="true">#</a> 风景&amp;美食</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-4dbf092b-e820-4114-8fd8-ab7e0ac59f8d.png" alt=""></p><p>广州的美景自然不用多说，另外空气质量也很好，说起空气质量，我这个北方人已经习惯冬天经常见不到太阳了。广州的美食也很多，白切鸡、煲仔饭和肠粉等等，还有很多我就不报菜名了，我在西安上学时食堂有个卖肠粉的窗口，我很爱吃，不过这个肠粉明显是本地化了。话说南北差异还是挺大的，我一个同学去广州上学，去洗澡带着搓澡巾，他的广州舍友都十分的好奇~ 当然广州的同学看我拍雪景也很好奇 ~ 还有一次实验室和厦门大学一起合作做项目，我和一个厦门大学的博士都要了一份豆腐脑，我加韭菜花，他加糖，我两面对面坐着都觉得对方的不能吃。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/guangzhou-1e3954bc-0b41-4302-851c-d07d382040cd.png" alt=""></p><blockquote><p>作者：大白，转载链接：<a href="https://mp.weixin.qq.com/s/uZQ8p0ytsQFXzt5ppzx6fA" target="_blank" rel="noopener noreferrer">https://mp.weixin.qq.com/s/uZQ8p0ytsQFXzt5ppzx6fA<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><img 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aria-label="成都有哪些牛批的互联网公司？"><!---->成都有哪些牛批的互联网公司？<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/guangzhou.html" class="nav-link sidebar-link sidebar-page" aria-label="想去广州了！"><!---->想去广州了！<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/cityselect/hangzhou.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="杭州有哪些顶级的互联网公司？"><!---->杭州有哪些顶级的互联网公司？<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/hangzhou.html#字节跳动" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="字节跳动"><!---->字节跳动<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/hangzhou.html#阿里系" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="阿里系"><!---->阿里系<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/hangzhou.html#京东" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="京东"><!---->京东<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/hangzhou.html#网易" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="网易"><!---->网易<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/hangzhou.html#华为" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="华为"><!---->华为<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/hangzhou.html#中移杭研" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="中移杭研"><!---->中移杭研<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/hangzhou.html#之江实验室" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="之江实验室"><!---->之江实验室<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/hangzhou.html#同花顺" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="同花顺"><!---->同花顺<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/hangzhou.html#_51-信用卡" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="51 信用卡"><!---->51 信用卡<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/hangzhou.html#蘑菇街" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="蘑菇街"><!---->蘑菇街<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/hangzhou.html#有赞" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="有赞"><!---->有赞<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/hangzhou.html#zoom" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="Zoom"><!---->Zoom<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/hangzhou.html#cisco-思科" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="Cisco(思科)"><!---->Cisco(思科)<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/cityselect/nanjing.html" class="nav-link sidebar-link sidebar-page" aria-label="南京有哪些靠谱的互联网公司？"><!---->南京有哪些靠谱的互联网公司？<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/qingdao.html" class="nav-link sidebar-link sidebar-page" aria-label="青岛有牛逼的互联网公司吗？"><!---->青岛有牛逼的互联网公司吗？<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/shenzhen.html" class="nav-link sidebar-link sidebar-page" aria-label="深圳有哪些牛批的互联网公司？"><!---->深圳有哪些牛批的互联网公司？<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/suzhou.html" class="nav-link sidebar-link sidebar-page" aria-label="想搬去苏州生活了。。"><!---->想搬去苏州生活了。。<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/xian.html" class="nav-link sidebar-link sidebar-page" aria-label="西安有哪些不错的互联网公司？"><!---->西安有哪些不错的互联网公司？<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/zhengzhou.html" class="nav-link sidebar-link sidebar-page" aria-label="郑州有哪些不错的互联网公司？"><!---->郑州有哪些不错的互联网公司？<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->杭州有哪些顶级的互联网公司？</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年2月16日</span><meta property="datePublished" content="2022-02-16T02:10:00.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category4" role>求职面试</li><meta property="articleSection" content="求职面试"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>城市选择</li></ul><meta property="keywords" content="城市选择"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 13 分钟</span><meta property="timeRequired" content="PT13M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/hangzhou.html#字节跳动" class="router-link-active router-link-exact-active toc-link level3">字节跳动</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/hangzhou.html#阿里系" class="router-link-active router-link-exact-active toc-link level3">阿里系</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/hangzhou.html#京东" class="router-link-active router-link-exact-active toc-link level3">京东</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/hangzhou.html#网易" class="router-link-active router-link-exact-active toc-link level3">网易</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/hangzhou.html#华为" class="router-link-active router-link-exact-active toc-link level3">华为</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/hangzhou.html#中移杭研" class="router-link-active router-link-exact-active toc-link level3">中移杭研</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/hangzhou.html#之江实验室" class="router-link-active router-link-exact-active toc-link level3">之江实验室</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/hangzhou.html#同花顺" class="router-link-active router-link-exact-active toc-link level3">同花顺</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/hangzhou.html#_51-信用卡" class="router-link-active router-link-exact-active toc-link level3">51 信用卡</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/hangzhou.html#蘑菇街" class="router-link-active router-link-exact-active toc-link level3">蘑菇街</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/hangzhou.html#有赞" class="router-link-active router-link-exact-active toc-link level3">有赞</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/hangzhou.html#zoom" class="router-link-active router-link-exact-active toc-link level3">Zoom</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/hangzhou.html#cisco-思科" class="router-link-active router-link-exact-active toc-link level3">Cisco(思科)</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="杭州有哪些顶级的互联网公司" tabindex="-1"><a class="header-anchor" href="#杭州有哪些顶级的互联网公司" aria-hidden="true">#</a> 杭州有哪些顶级的互联网公司？</h1><p>大家好，我是二哥呀！上期发了南京的互联网公司后，杭州的呼声非常高。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/hangzhou-1.png" alt=""></p><p>有小伙伴在公众号后台私信催，还有小伙伴在二哥的《Java 程序员进阶之路》的开源专栏提交了 issue，那今天必须得来整一波了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/hangzhou-2.png" alt=""></p><p>杭州的互联网公司比较多，我先列举一些大家瞅瞅（部分数据来源于好朋友 Carl 的统计）。</p><p><strong>一线的互联网公司</strong>有：</p><ul><li>阿里巴巴（总部）</li><li>蚂蚁金服（总部）阿里旗下</li><li>阿里云（总部）阿里旗下</li><li>网易（杭州） 网易云音乐</li><li>字节跳动（杭州）抖音分部</li></ul><p><strong>外企</strong>有：</p><ul><li>ZOOM （杭州研发中心）全球知名云视频会议服务提供商</li><li>infosys（杭州）印度公司，据说工资相对不高</li><li>思科（杭州）</li></ul><p><strong>二三线互联网</strong>公司：</p><ul><li>滴滴（杭州）</li><li>快手（杭州）</li><li>蘑菇街（总部）女性消费者的电子商务网站</li><li>有赞（总部）帮助商家进行网上开店、社交营销</li><li>菜鸟网络（杭州）</li><li>花瓣网（总部）图片素材领导者</li><li>兑吧（总部）用户运营服务平台</li><li>同花顺（总部）网上股票证券交易分析软件</li><li>51 信用卡（总部）信用卡管理</li><li>虾米（总部）已被阿里收购</li><li>曹操出行（总部）</li><li>口碑网 （总部）</li></ul><p><strong>硬件巨头</strong>：</p><ul><li>海康威视（总部）安防三巨头</li><li>浙江大华（总部）安防三巨头</li><li>杭州宇视（总部） 安防三巨头</li><li>华为（杭州）</li><li>vivo（杭州）</li><li>oppo（杭州）</li><li>魅族（杭州）</li></ul><p><strong>AI 独角兽公司</strong>：</p><ul><li>旷视科技（杭州）人工智能产品和解决方案，Face++云平台就是他们家的产品。</li><li>商汤（杭州） Ai 领域独角兽，业务涵盖智慧商业、智慧城市、智慧生活、智能汽车四大板块。</li></ul><p><strong>创业公司</strong>：</p><ul><li>e 签宝（总部）做电子签名</li><li>婚礼纪（总部）好多结婚的朋友都用</li><li>大搜车（总部）中国领先的汽车交易服务供应商</li><li>二更（总部）自媒体</li><li>丁香园（总部）</li></ul><hr><p>是不是有点应接不暇、眼花缭乱？</p><p>那这篇文章就挑一些比较有代表性的来介绍一下。希望能对小伙伴们在选择公司的时候提供一点点参考和帮助。</p><h3 id="字节跳动" tabindex="-1"><a class="header-anchor" href="#字节跳动" aria-hidden="true">#</a> 字节跳动</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/hangzhou-3.png" alt=""></p><ul><li>「基本情况」 ：字节总部在北京，在上海、深圳、杭州、广州、成都等地都有办公室。去年 6 月，抖音电商落户杭州。</li><li>「业务方向」 ：抖音电商、抖音餐饮、字节跳动广告业务、字节跳动本地生活</li><li>「工作地点」 ：余杭区中国杭州 5G 创新园 5 层、余杭区杭州巨量引擎网络技术有限公司 1401</li><li>「福利情况」：六险一金(12%)、包三餐、免费下午茶+零食、免费健身房、Top 薪酬、住房补贴</li><li>「招聘情况」：主要招聘后端（Java、Go）、前端、测试等岗位。</li><li>「面试」 ：面试这块的话，主要是问计算机基础知识，一般先会让你做一道算法题，算法题的难度还是比较大的。字节的面试有个好处是可以对你反复进行打捞，就是说你面挂一个部门以后，可以马上再转投另一个部门，并且好多部门是不用笔试直接进面试的。</li></ul><h3 id="阿里系" tabindex="-1"><a class="header-anchor" href="#阿里系" aria-hidden="true">#</a> 阿里系</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/hangzhou-4.png" alt=""></p><ul><li>「基本情况」 ：阿里系占据了杭州互联网的一片天，相关联的企业是在是太多了。</li><li>「业务方向」 ：达摩院、淘宝、菜鸟、钉钉、飞猪、盒马、支付宝、夸克、UC、书旗小说......</li><li>「工作地点」 ：西湖区、滨江区、余杭区......</li><li>「福利情况」：7 险一金（全额住房公积金）、节日礼物、带薪假期、集体婚礼。</li><li>「招聘情况」：主要招聘 Java 后端开发、数据研发、数据分析、算法工程师等岗位。</li><li>「面试」 ：不论是校招还是社招，技术面试问的都比较深入，通常会针对一个技术问题深入挖下去。</li><li>「补充」 ：加班的问题比较严重，受不了 996 的小伙伴慎重考虑。</li></ul><h3 id="京东" tabindex="-1"><a class="header-anchor" href="#京东" aria-hidden="true">#</a> 京东</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/hangzhou-5.png" alt=""></p><ul><li>「基本情况」 ：京东在杭州也有招聘，不过，招聘的岗位比较少。</li><li>「业务方向」 ：京东金融、京东云</li><li>「工作地点」 ：杭州拱墅区中国智慧信息产业园 M 座 12 楼</li><li>「福利情况」：五险一金、年度体检、住房补助、餐补、带薪假期</li><li>「招聘情况」：主要招聘 Java、产品经理等岗位</li><li>「面试」 ：京东的技术面试采用常规面试，并且问的相对简单一些，而且可以部门直招，不需要笔试。技术面试有时候是两轮，有时候是三轮。在京东如果两轮面试以后你直接遇到了 HR 对你面试，你一般就是普通 offer 了。第三轮的主管面会决定是否给你 sp。但是！据我所知，京东 HR 面挂掉的人还挺多的，所以京东的技术面走完以后还不太稳。HR 面完你以后，如果隔一段时间问了你身份证号，并核对你毕业时间后，这就很稳了。</li></ul><h3 id="网易" tabindex="-1"><a class="header-anchor" href="#网易" aria-hidden="true">#</a> 网易</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/hangzhou-6.png" alt=""></p><ul><li>「基本情况」 ：网易在杭州有一个研究院，成立于 2006 年 6 月。</li><li>「业务方向」 ：⽹易杭州研究院，简称“杭研”。杭研是⽹易内部的基础技术研发中⼼和前沿技术研究中⼼，在云计算、⼤数据、安全、⼈⼯智能等⽅⾯进⾏前沿技术研究、关键技术攻关和基础技术平台研发，服务⽹易系游戏、邮箱、⾳乐、电商、新闻、在线教育等产品，触达近 10 亿⽤户。</li><li>「工作地点」 ：杭州滨江区网易大厦二期网商路 399 号</li><li>「福利情况」：运动设施、生日礼物、免费班车、五险一金、补充医疗险、重疾险、意外险、定期寿险</li><li>「招聘情况」：主要招聘 Java 、前端、区块链等岗位。</li><li>「面试」 ：技术面试通常由 2 轮，最后 1 轮一般是 hr 面。注重项目和基本功 , 既要有广度还要有深度。</li></ul><h3 id="华为" tabindex="-1"><a class="header-anchor" href="#华为" aria-hidden="true">#</a> 华为</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/hangzhou-7.png" alt=""></p><ul><li>「基本情况」 ：华为在杭州有一个研究所。</li><li>「业务方向」 ：智能摄像机、云服务</li><li>「工作地点」 ：杭州滨江区华为技术有限公司杭州研究所</li><li>「福利情况」：员工股权激励、薪资非常有竞争力。华为校招根据面试评分给应届生进行评级，本科生和硕士生的评级在 13 级 和 15 级 之间，每一级又分为 A、B、C 三个档。根据评级进行工资的评定，13 级 和 14 级 的税前工资在每月 13-19k 之间，每年 14 薪。15 级 需要特别优秀的硕士才能拿到，工资年包基本在税前 30 万 - 40 万之间。</li><li>「招聘情况」：主要招聘软件开发（Java、C++）、嵌入式开发、测试等岗位。另外，华为社招一般都是 OD 模式。</li><li>「面试」 ：面试的话，难度一般，主要看学历。</li><li>「补充」 : 华为加班比较多，压力可能会比较大。不过，薪资收入在全国绝对是 Top 级别。</li></ul><h3 id="中移杭研" tabindex="-1"><a class="header-anchor" href="#中移杭研" aria-hidden="true">#</a> 中移杭研</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/hangzhou-8.png" alt=""></p><ul><li>「基本情况」 ：中国移动的一个全资子公司，2014 年在杭州成立。</li><li>「业务方向」 ：统一认证、融合通信、魔固云</li><li>「工作地点」 ：杭州余杭区中国移动(杭州研发中心)余杭塘路 1600 号</li><li>「福利情况」：五险两金（企业年金）、补充医疗保险、意外保险、带薪假期</li><li>「招聘情况」：主要招聘前端、后端、安卓、算法等岗位。</li><li>「面试」 ：面试的话，难度一般，主要看学历。</li></ul><h3 id="之江实验室" tabindex="-1"><a class="header-anchor" href="#之江实验室" aria-hidden="true">#</a> 之江实验室</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/hangzhou-9.png" alt=""></p><ul><li>「基本情况」 ：之江实验室是浙江省委、省政府贯彻落实科技创新思想，深入实施创新驱动发展战略的重大科技创新平台。</li><li>「业务方向」 ：智能感知、智能计算、智能网络、智能系统</li><li>「工作地点」 ：杭州市余杭区文一西路 1818 号中国人工智能小镇 10 号楼</li><li>「福利情况」：五险一金、Top 薪资、住房保障、优惠税收、带薪假期、餐补</li><li>「招聘情况」：主要招聘软件开发、芯片设计、DevOps 、测试等岗位</li><li>「面试」 ：对学历要求特别高！</li></ul><h3 id="同花顺" tabindex="-1"><a class="header-anchor" href="#同花顺" aria-hidden="true">#</a> 同花顺</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/hangzhou-10.png" alt=""></p><ul><li>「基本情况」 ：同花顺成立于 2001 年,总部位于杭州未来科技城，是国内第一家互联网金融信息服务业上市公司。同花顺作为一家互联网金融信息提供商，致力于为各类机构提供软件产品和系统维护服务、金融数据服务和智能推广服务，为个人投资者提供金融资讯和投资理财分析工具。</li><li>「业务方向」 ：旗下有多款热门投资理财类 APP。</li><li>「工作地点」 ：杭州余杭区同花顺新大楼总部同顺街 18 号</li><li>「福利情况」：薪资中等偏上，其他福利情况未知</li><li>「招聘情况」：主要招聘 Java、C++、前端、机器学习、产品经理等岗位</li><li>「面试」 ：技术面试难度一般，而且通常就只有一轮技术面试。这是一位去面试同花顺后端开发的朋友给我反馈的面经：“面试官非常和善。上来就让你做个自我介绍，回答哪里毕业，毕业之后在哪工作，熟悉的技术栈。然后问了为什么离职之类的。之后开始问之前做的项目，重点问你做了哪些有亮点的项目，随便答了个高并发下保证原子性的项目，然后和面试官一起讨论会不会有更好的解决办法。”</li></ul><h3 id="_51-信用卡" tabindex="-1"><a class="header-anchor" href="#_51-信用卡" aria-hidden="true">#</a> 51 信用卡</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/hangzhou-11.png" alt=""></p><ul><li>「基本情况」 ：51 信用卡（母公司为杭州恩牛网络技术有限公司），公司创立于 2012 年，是一家服务于中国亿万信用卡用户的互联网金融公司。</li><li>「业务方向」 ：旗下有“51 信用卡管家”、“51 人品”、“51 人品贷”等 APP</li><li>「工作地点」 ：杭州西湖区中节能·西溪首座 B3、杭州西湖区西溪谷 G 座</li><li>「福利情况」：六险一金、生日礼物、节日贺礼、生育关怀、精彩团建、年度体检、年度旅游</li><li>「招聘情况」：主要招聘 Java、前端、安全、数据仓库等岗位</li><li>「面试」 ：面试难度一般。技术面试一般会有 2 面，最后一面是 HR 面。 本土互联网公司</li></ul><h3 id="蘑菇街" tabindex="-1"><a class="header-anchor" href="#蘑菇街" aria-hidden="true">#</a> 蘑菇街</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/hangzhou-12.png" alt=""></p><ul><li>「基本情况」 ：2011 年，蘑菇街正式上线，2016 年 1 月与美丽说战略融合，公司旗下包括：蘑菇街、美丽说、uni 等产品与服务。</li><li>「业务方向」 ：电商</li><li>「工作地点」 ：杭州西湖区黄龙万科中心 G 座</li><li>「福利情况」：无限的零食饮料供应、健身房、咖啡厅、</li><li>「招聘情况」：主要招聘 Java 后端、前端、移动开发等岗位。</li><li>「面试」 ：面试难度中等。技术面试一般会有 2 面，最后一面是 HR 面。</li><li>「补充」 : 据说公司的工作体验还不错！</li></ul><h3 id="有赞" tabindex="-1"><a class="header-anchor" href="#有赞" aria-hidden="true">#</a> 有赞</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/hangzhou-13.png" alt=""></p><ul><li>「基本情况」 ：有赞，原名口袋通，2012 年 11 月 27 日在杭州贝塔咖啡馆孵化成立，是一家主要从事零售科技 SaaS 服务的企业，帮助商家进行网上开店、社交营销、提高留存复购，拓展全渠道新零售业务。2014 年 11 月 27 日，口袋通正式更名为有赞。2018 年 4 月 18 日，有赞完成在港上市。2019 年 4 月，腾讯领投有赞 10 亿港元融资。</li><li>「业务方向」 ：SaaS 服务（帮助商家网上开店、社交营销......）、PaaS 云服务。</li><li>「工作地点」 ：杭州西湖区杭州有赞科技有限公司西溪路 698 号、杭州西湖区黄龙万科中心 G 座</li><li>「福利情况」：全额五险一金，公积金 12%+饭补+话费补助</li><li>「招聘情况」：主要招聘后端、前端、移动开发等岗位。</li><li>「面试」 ：面试难度中等偏上。一般有 3 轮面试，前 2 面是技术面，最后 1 面是 HR 面。这是我的一位去面试有赞 Java 后端开发的朋友给我反馈的面经：“面试官很看重专业技能，1 面问基础，很细很广，能问的基本都问了个遍。Java 基础、多线程、JVM、RPC、限流算法、降级算法、分布式事务中间件、Redis、分布式锁......2 面跟 1 面相比差不太多，有些偏重解决问题思路。3 面交流了下个人情况也提了很多建议。”</li><li>「补充」 : 公司技术不错！主要招聘 Java 开发，做 Java 的可以优先考虑这家。</li></ul><h3 id="zoom" tabindex="-1"><a class="header-anchor" href="#zoom" aria-hidden="true">#</a> Zoom</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/hangzhou-14.png" alt=""></p><ul><li>「基本情况」 ：Zoom 是一位美国华人企业家创办的公司，主营业务就是提供视频会议服务。总部位于硅谷，国内的话，杭州、苏州、合肥均有研发中心。</li><li>「业务方向」 ：视频会议</li><li>「工作地点」 ：杭州滨江区海康威视东流路 700 号</li><li>「福利情况」：全额五险一金、商业保险、餐补、年度旅游</li><li>「招聘情况」：主要招聘算法、测试、Web 前端、全栈、C/C++（后端开发这块 C++招聘偏多一些）、Java、Go。</li><li>「面试」 ：难度一般，外企一般比较重视计算机基础知识。</li><li>「补充」 : Zoom 的工作环境、企业文化什么的好评度在国内外都挺高的。不过，据说也存在部分项目组加班的情况。965 不加班，work life balance。技术氛围好，相处简单。</li></ul><h3 id="cisco-思科" tabindex="-1"><a class="header-anchor" href="#cisco-思科" aria-hidden="true">#</a> Cisco(思科)</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/hangzhou-15.png" alt=""></p><ul><li>「基本情况」 ：思科系统公司（Cisco Systems, Inc.），简称思科公司或思科，1984 年 12 月正式成立，是互联网解决方案的领先提供者，其设备和软件产品主要用于连接计算机网络系统，总部位于美国加利福尼亚州圣何塞。</li><li>「业务方向」 ：路由器、交换机等网络基础设施</li><li>「工作地点」 ：杭州上城区中豪·望江国际 4 幢 20 层</li><li>「福利情况」：全额五险一金、商业保险、餐补、年度旅游</li><li>「招聘情况」：主要招聘 Java、前端等岗位</li><li>「面试」 ：难度中等偏上，外企一般比较重视计算机基础知识。</li></ul><hr><p>对于杭州，我印象最深刻的就是在苏州上班时和同事去乌镇-杭州的三日游了，当时阿里还没有兴起，互联网环境也没有现在这般能卷。</p><p>顺带再聊聊杭州的房价、教育吧。杭州的房价不忍直视啊！！！涨的实在是太厉害了！</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/hangzhou-16.png" alt=""></p><p>杭州只有一所 985，也就是浙江大学。除了浙江大学之外，浙江省没有 211 院校。不过，杭州电子科技大学虽然不是 211，但是实力很强，外界也很认可。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/hangzhou-17.png" alt=""></p><blockquote><p>作者：大白，转载链接：<a href="https://mp.weixin.qq.com/s/hrL2tqXHT5AjOqrQlRhR-w" target="_blank" rel="noopener noreferrer">https://mp.weixin.qq.com/s/hrL2tqXHT5AjOqrQlRhR-w<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" 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clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">六、求职面试</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">面试题集合</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">背诵版八股文</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">城市选择</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/cityselect/beijing.html" class="nav-link sidebar-link sidebar-page" aria-label="北京"><!---->北京<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/chengdu.html" class="nav-link sidebar-link sidebar-page" aria-label="成都"><!---->成都<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/guangzhou.html" class="nav-link sidebar-link sidebar-page" aria-label="广州"><!---->广州<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/cityselect/hangzhou.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="杭州"><!---->杭州<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/hangzhou.html#字节跳动" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="字节跳动"><!---->字节跳动<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/hangzhou.html#阿里系" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="阿里系"><!---->阿里系<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/hangzhou.html#京东" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="京东"><!---->京东<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/hangzhou.html#网易" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="网易"><!---->网易<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/hangzhou.html#华为" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="华为"><!---->华为<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/hangzhou.html#中移杭研" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="中移杭研"><!---->中移杭研<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/hangzhou.html#之江实验室" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="之江实验室"><!---->之江实验室<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/hangzhou.html#同花顺" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="同花顺"><!---->同花顺<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/hangzhou.html#_51-信用卡" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="51 信用卡"><!---->51 信用卡<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/hangzhou.html#蘑菇街" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="蘑菇街"><!---->蘑菇街<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/hangzhou.html#有赞" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="有赞"><!---->有赞<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/hangzhou.html#zoom" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="Zoom"><!---->Zoom<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/hangzhou.html#cisco-思科" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="Cisco(思科)"><!---->Cisco(思科)<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/cityselect/nanjing.html" class="nav-link sidebar-link sidebar-page" aria-label="南京"><!---->南京<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/qingdao.html" class="nav-link sidebar-link sidebar-page" aria-label="青岛"><!---->青岛<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/shenzhen.html" class="nav-link sidebar-link sidebar-page" aria-label="深圳"><!---->深圳<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/suzhou.html" class="nav-link sidebar-link sidebar-page" aria-label="苏州"><!---->苏州<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/xian.html" class="nav-link sidebar-link sidebar-page" aria-label="西安"><!---->西安<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/zhengzhou.html" class="nav-link sidebar-link sidebar-page" aria-label="郑州"><!---->郑州<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/jinan.html" class="nav-link sidebar-link sidebar-page" aria-label="济南"><!---->济南<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->杭州都有哪些值得加入的IT互联网公司？</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年2月16日</span><meta property="datePublished" content="2022-02-16T02:10:00.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category4" role>求职面试</li><meta property="articleSection" content="求职面试"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>城市选择</li></ul><meta property="keywords" content="城市选择"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 13 分钟</span><meta property="timeRequired" content="PT13M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/hangzhou.html#字节跳动" class="router-link-active router-link-exact-active toc-link level3">字节跳动</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/hangzhou.html#阿里系" class="router-link-active router-link-exact-active toc-link level3">阿里系</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/hangzhou.html#京东" class="router-link-active router-link-exact-active toc-link level3">京东</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/hangzhou.html#网易" class="router-link-active router-link-exact-active toc-link level3">网易</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/hangzhou.html#华为" class="router-link-active router-link-exact-active toc-link level3">华为</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/hangzhou.html#中移杭研" class="router-link-active router-link-exact-active toc-link level3">中移杭研</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/hangzhou.html#之江实验室" class="router-link-active router-link-exact-active toc-link level3">之江实验室</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/hangzhou.html#同花顺" class="router-link-active router-link-exact-active toc-link level3">同花顺</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/hangzhou.html#_51-信用卡" class="router-link-active router-link-exact-active toc-link level3">51 信用卡</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/hangzhou.html#蘑菇街" class="router-link-active router-link-exact-active toc-link level3">蘑菇街</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/hangzhou.html#有赞" class="router-link-active router-link-exact-active toc-link level3">有赞</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/hangzhou.html#zoom" class="router-link-active router-link-exact-active toc-link level3">Zoom</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/hangzhou.html#cisco-思科" class="router-link-active router-link-exact-active toc-link level3">Cisco(思科)</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="杭州都有哪些值得加入的it互联网公司" tabindex="-1"><a class="header-anchor" href="#杭州都有哪些值得加入的it互联网公司" aria-hidden="true">#</a> 杭州都有哪些值得加入的IT互联网公司？</h1><p>大家好，我是二哥呀！上期发了南京的互联网公司后，杭州的呼声非常高。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/hangzhou-1.png" alt=""></p><p>有小伙伴在公众号后台私信催，还有小伙伴在二哥的《Java 程序员进阶之路》的开源专栏提交了 issue，那今天必须得来整一波了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/hangzhou-2.png" alt=""></p><p>杭州的互联网公司比较多，我先列举一些大家瞅瞅（部分数据来源于好朋友 Carl 的统计）。</p><p><strong>一线的互联网公司</strong>有：</p><ul><li>阿里巴巴（总部）</li><li>蚂蚁金服（总部）阿里旗下</li><li>阿里云（总部）阿里旗下</li><li>网易（杭州） 网易云音乐</li><li>字节跳动（杭州）抖音分部</li></ul><p><strong>外企</strong>有：</p><ul><li>ZOOM （杭州研发中心）全球知名云视频会议服务提供商</li><li>infosys（杭州）印度公司，据说工资相对不高</li><li>思科（杭州）</li></ul><p><strong>二三线互联网</strong>公司：</p><ul><li>滴滴（杭州）</li><li>快手（杭州）</li><li>蘑菇街（总部）女性消费者的电子商务网站</li><li>有赞（总部）帮助商家进行网上开店、社交营销</li><li>菜鸟网络（杭州）</li><li>花瓣网（总部）图片素材领导者</li><li>兑吧（总部）用户运营服务平台</li><li>同花顺（总部）网上股票证券交易分析软件</li><li>51 信用卡（总部）信用卡管理</li><li>虾米（总部）已被阿里收购</li><li>曹操出行（总部）</li><li>口碑网 （总部）</li></ul><p><strong>硬件巨头</strong>：</p><ul><li>海康威视（总部）安防三巨头</li><li>浙江大华（总部）安防三巨头</li><li>杭州宇视（总部） 安防三巨头</li><li>华为（杭州）</li><li>vivo（杭州）</li><li>oppo（杭州）</li><li>魅族（杭州）</li></ul><p><strong>AI 独角兽公司</strong>：</p><ul><li>旷视科技（杭州）人工智能产品和解决方案，Face++云平台就是他们家的产品。</li><li>商汤（杭州） Ai 领域独角兽，业务涵盖智慧商业、智慧城市、智慧生活、智能汽车四大板块。</li></ul><p><strong>创业公司</strong>：</p><ul><li>e 签宝（总部）做电子签名</li><li>婚礼纪（总部）好多结婚的朋友都用</li><li>大搜车（总部）中国领先的汽车交易服务供应商</li><li>二更（总部）自媒体</li><li>丁香园（总部）</li></ul><hr><p>是不是有点应接不暇、眼花缭乱？</p><p>那这篇文章就挑一些比较有代表性的来介绍一下。希望能对小伙伴们在选择公司的时候提供一点点参考和帮助。</p><h3 id="字节跳动" tabindex="-1"><a class="header-anchor" href="#字节跳动" aria-hidden="true">#</a> 字节跳动</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/hangzhou-3.png" alt=""></p><ul><li>「基本情况」 ：字节总部在北京，在上海、深圳、杭州、广州、成都等地都有办公室。去年 6 月，抖音电商落户杭州。</li><li>「业务方向」 ：抖音电商、抖音餐饮、字节跳动广告业务、字节跳动本地生活</li><li>「工作地点」 ：余杭区中国杭州 5G 创新园 5 层、余杭区杭州巨量引擎网络技术有限公司 1401</li><li>「福利情况」：六险一金(12%)、包三餐、免费下午茶+零食、免费健身房、Top 薪酬、住房补贴</li><li>「招聘情况」：主要招聘后端（Java、Go）、前端、测试等岗位。</li><li>「面试」 ：面试这块的话，主要是问计算机基础知识，一般先会让你做一道算法题，算法题的难度还是比较大的。字节的面试有个好处是可以对你反复进行打捞，就是说你面挂一个部门以后，可以马上再转投另一个部门，并且好多部门是不用笔试直接进面试的。</li></ul><h3 id="阿里系" tabindex="-1"><a class="header-anchor" href="#阿里系" aria-hidden="true">#</a> 阿里系</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/hangzhou-4.png" alt=""></p><ul><li>「基本情况」 ：阿里系占据了杭州互联网的一片天，相关联的企业是在是太多了。</li><li>「业务方向」 ：达摩院、淘宝、菜鸟、钉钉、飞猪、盒马、支付宝、夸克、UC、书旗小说......</li><li>「工作地点」 ：西湖区、滨江区、余杭区......</li><li>「福利情况」：7 险一金（全额住房公积金）、节日礼物、带薪假期、集体婚礼。</li><li>「招聘情况」：主要招聘 Java 后端开发、数据研发、数据分析、算法工程师等岗位。</li><li>「面试」 ：不论是校招还是社招，技术面试问的都比较深入，通常会针对一个技术问题深入挖下去。</li><li>「补充」 ：加班的问题比较严重，受不了 996 的小伙伴慎重考虑。</li></ul><h3 id="京东" tabindex="-1"><a class="header-anchor" href="#京东" aria-hidden="true">#</a> 京东</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/hangzhou-5.png" alt=""></p><ul><li>「基本情况」 ：京东在杭州也有招聘，不过，招聘的岗位比较少。</li><li>「业务方向」 ：京东金融、京东云</li><li>「工作地点」 ：杭州拱墅区中国智慧信息产业园 M 座 12 楼</li><li>「福利情况」：五险一金、年度体检、住房补助、餐补、带薪假期</li><li>「招聘情况」：主要招聘 Java、产品经理等岗位</li><li>「面试」 ：京东的技术面试采用常规面试，并且问的相对简单一些，而且可以部门直招，不需要笔试。技术面试有时候是两轮，有时候是三轮。在京东如果两轮面试以后你直接遇到了 HR 对你面试，你一般就是普通 offer 了。第三轮的主管面会决定是否给你 sp。但是！据我所知，京东 HR 面挂掉的人还挺多的，所以京东的技术面走完以后还不太稳。HR 面完你以后，如果隔一段时间问了你身份证号，并核对你毕业时间后，这就很稳了。</li></ul><h3 id="网易" tabindex="-1"><a class="header-anchor" href="#网易" aria-hidden="true">#</a> 网易</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/hangzhou-6.png" alt=""></p><ul><li>「基本情况」 ：网易在杭州有一个研究院，成立于 2006 年 6 月。</li><li>「业务方向」 ：⽹易杭州研究院，简称“杭研”。杭研是⽹易内部的基础技术研发中⼼和前沿技术研究中⼼，在云计算、⼤数据、安全、⼈⼯智能等⽅⾯进⾏前沿技术研究、关键技术攻关和基础技术平台研发，服务⽹易系游戏、邮箱、⾳乐、电商、新闻、在线教育等产品，触达近 10 亿⽤户。</li><li>「工作地点」 ：杭州滨江区网易大厦二期网商路 399 号</li><li>「福利情况」：运动设施、生日礼物、免费班车、五险一金、补充医疗险、重疾险、意外险、定期寿险</li><li>「招聘情况」：主要招聘 Java 、前端、区块链等岗位。</li><li>「面试」 ：技术面试通常由 2 轮，最后 1 轮一般是 hr 面。注重项目和基本功 , 既要有广度还要有深度。</li></ul><h3 id="华为" tabindex="-1"><a class="header-anchor" href="#华为" aria-hidden="true">#</a> 华为</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/hangzhou-7.png" alt=""></p><ul><li>「基本情况」 ：华为在杭州有一个研究所。</li><li>「业务方向」 ：智能摄像机、云服务</li><li>「工作地点」 ：杭州滨江区华为技术有限公司杭州研究所</li><li>「福利情况」：员工股权激励、薪资非常有竞争力。华为校招根据面试评分给应届生进行评级，本科生和硕士生的评级在 13 级 和 15 级 之间，每一级又分为 A、B、C 三个档。根据评级进行工资的评定，13 级 和 14 级 的税前工资在每月 13-19k 之间，每年 14 薪。15 级 需要特别优秀的硕士才能拿到，工资年包基本在税前 30 万 - 40 万之间。</li><li>「招聘情况」：主要招聘软件开发（Java、C++）、嵌入式开发、测试等岗位。另外，华为社招一般都是 OD 模式。</li><li>「面试」 ：面试的话，难度一般，主要看学历。</li><li>「补充」 : 华为加班比较多，压力可能会比较大。不过，薪资收入在全国绝对是 Top 级别。</li></ul><h3 id="中移杭研" tabindex="-1"><a class="header-anchor" href="#中移杭研" aria-hidden="true">#</a> 中移杭研</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/hangzhou-8.png" alt=""></p><ul><li>「基本情况」 ：中国移动的一个全资子公司，2014 年在杭州成立。</li><li>「业务方向」 ：统一认证、融合通信、魔固云</li><li>「工作地点」 ：杭州余杭区中国移动(杭州研发中心)余杭塘路 1600 号</li><li>「福利情况」：五险两金（企业年金）、补充医疗保险、意外保险、带薪假期</li><li>「招聘情况」：主要招聘前端、后端、安卓、算法等岗位。</li><li>「面试」 ：面试的话，难度一般，主要看学历。</li></ul><h3 id="之江实验室" tabindex="-1"><a class="header-anchor" href="#之江实验室" aria-hidden="true">#</a> 之江实验室</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/hangzhou-9.png" alt=""></p><ul><li>「基本情况」 ：之江实验室是浙江省委、省政府贯彻落实科技创新思想，深入实施创新驱动发展战略的重大科技创新平台。</li><li>「业务方向」 ：智能感知、智能计算、智能网络、智能系统</li><li>「工作地点」 ：杭州市余杭区文一西路 1818 号中国人工智能小镇 10 号楼</li><li>「福利情况」：五险一金、Top 薪资、住房保障、优惠税收、带薪假期、餐补</li><li>「招聘情况」：主要招聘软件开发、芯片设计、DevOps 、测试等岗位</li><li>「面试」 ：对学历要求特别高！</li></ul><h3 id="同花顺" tabindex="-1"><a class="header-anchor" href="#同花顺" aria-hidden="true">#</a> 同花顺</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/hangzhou-10.png" alt=""></p><ul><li>「基本情况」 ：同花顺成立于 2001 年,总部位于杭州未来科技城，是国内第一家互联网金融信息服务业上市公司。同花顺作为一家互联网金融信息提供商，致力于为各类机构提供软件产品和系统维护服务、金融数据服务和智能推广服务，为个人投资者提供金融资讯和投资理财分析工具。</li><li>「业务方向」 ：旗下有多款热门投资理财类 APP。</li><li>「工作地点」 ：杭州余杭区同花顺新大楼总部同顺街 18 号</li><li>「福利情况」：薪资中等偏上，其他福利情况未知</li><li>「招聘情况」：主要招聘 Java、C++、前端、机器学习、产品经理等岗位</li><li>「面试」 ：技术面试难度一般，而且通常就只有一轮技术面试。这是一位去面试同花顺后端开发的朋友给我反馈的面经：“面试官非常和善。上来就让你做个自我介绍，回答哪里毕业，毕业之后在哪工作，熟悉的技术栈。然后问了为什么离职之类的。之后开始问之前做的项目，重点问你做了哪些有亮点的项目，随便答了个高并发下保证原子性的项目，然后和面试官一起讨论会不会有更好的解决办法。”</li></ul><h3 id="_51-信用卡" tabindex="-1"><a class="header-anchor" href="#_51-信用卡" aria-hidden="true">#</a> 51 信用卡</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/hangzhou-11.png" alt=""></p><ul><li>「基本情况」 ：51 信用卡（母公司为杭州恩牛网络技术有限公司），公司创立于 2012 年，是一家服务于中国亿万信用卡用户的互联网金融公司。</li><li>「业务方向」 ：旗下有“51 信用卡管家”、“51 人品”、“51 人品贷”等 APP</li><li>「工作地点」 ：杭州西湖区中节能·西溪首座 B3、杭州西湖区西溪谷 G 座</li><li>「福利情况」：六险一金、生日礼物、节日贺礼、生育关怀、精彩团建、年度体检、年度旅游</li><li>「招聘情况」：主要招聘 Java、前端、安全、数据仓库等岗位</li><li>「面试」 ：面试难度一般。技术面试一般会有 2 面，最后一面是 HR 面。 本土互联网公司</li></ul><h3 id="蘑菇街" tabindex="-1"><a class="header-anchor" href="#蘑菇街" aria-hidden="true">#</a> 蘑菇街</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/hangzhou-12.png" alt=""></p><ul><li>「基本情况」 ：2011 年，蘑菇街正式上线，2016 年 1 月与美丽说战略融合，公司旗下包括：蘑菇街、美丽说、uni 等产品与服务。</li><li>「业务方向」 ：电商</li><li>「工作地点」 ：杭州西湖区黄龙万科中心 G 座</li><li>「福利情况」：无限的零食饮料供应、健身房、咖啡厅、</li><li>「招聘情况」：主要招聘 Java 后端、前端、移动开发等岗位。</li><li>「面试」 ：面试难度中等。技术面试一般会有 2 面，最后一面是 HR 面。</li><li>「补充」 : 据说公司的工作体验还不错！</li></ul><h3 id="有赞" tabindex="-1"><a class="header-anchor" href="#有赞" aria-hidden="true">#</a> 有赞</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/hangzhou-13.png" alt=""></p><ul><li>「基本情况」 ：有赞，原名口袋通，2012 年 11 月 27 日在杭州贝塔咖啡馆孵化成立，是一家主要从事零售科技 SaaS 服务的企业，帮助商家进行网上开店、社交营销、提高留存复购，拓展全渠道新零售业务。2014 年 11 月 27 日，口袋通正式更名为有赞。2018 年 4 月 18 日，有赞完成在港上市。2019 年 4 月，腾讯领投有赞 10 亿港元融资。</li><li>「业务方向」 ：SaaS 服务（帮助商家网上开店、社交营销......）、PaaS 云服务。</li><li>「工作地点」 ：杭州西湖区杭州有赞科技有限公司西溪路 698 号、杭州西湖区黄龙万科中心 G 座</li><li>「福利情况」：全额五险一金，公积金 12%+饭补+话费补助</li><li>「招聘情况」：主要招聘后端、前端、移动开发等岗位。</li><li>「面试」 ：面试难度中等偏上。一般有 3 轮面试，前 2 面是技术面，最后 1 面是 HR 面。这是我的一位去面试有赞 Java 后端开发的朋友给我反馈的面经：“面试官很看重专业技能，1 面问基础，很细很广，能问的基本都问了个遍。Java 基础、多线程、JVM、RPC、限流算法、降级算法、分布式事务中间件、Redis、分布式锁......2 面跟 1 面相比差不太多，有些偏重解决问题思路。3 面交流了下个人情况也提了很多建议。”</li><li>「补充」 : 公司技术不错！主要招聘 Java 开发，做 Java 的可以优先考虑这家。</li></ul><h3 id="zoom" tabindex="-1"><a class="header-anchor" href="#zoom" aria-hidden="true">#</a> Zoom</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/hangzhou-14.png" alt=""></p><ul><li>「基本情况」 ：Zoom 是一位美国华人企业家创办的公司，主营业务就是提供视频会议服务。总部位于硅谷，国内的话，杭州、苏州、合肥均有研发中心。</li><li>「业务方向」 ：视频会议</li><li>「工作地点」 ：杭州滨江区海康威视东流路 700 号</li><li>「福利情况」：全额五险一金、商业保险、餐补、年度旅游</li><li>「招聘情况」：主要招聘算法、测试、Web 前端、全栈、C/C++（后端开发这块 C++招聘偏多一些）、Java、Go。</li><li>「面试」 ：难度一般，外企一般比较重视计算机基础知识。</li><li>「补充」 : Zoom 的工作环境、企业文化什么的好评度在国内外都挺高的。不过，据说也存在部分项目组加班的情况。965 不加班，work life balance。技术氛围好，相处简单。</li></ul><h3 id="cisco-思科" tabindex="-1"><a class="header-anchor" href="#cisco-思科" aria-hidden="true">#</a> Cisco(思科)</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/hangzhou-15.png" alt=""></p><ul><li>「基本情况」 ：思科系统公司（Cisco Systems, Inc.），简称思科公司或思科，1984 年 12 月正式成立，是互联网解决方案的领先提供者，其设备和软件产品主要用于连接计算机网络系统，总部位于美国加利福尼亚州圣何塞。</li><li>「业务方向」 ：路由器、交换机等网络基础设施</li><li>「工作地点」 ：杭州上城区中豪·望江国际 4 幢 20 层</li><li>「福利情况」：全额五险一金、商业保险、餐补、年度旅游</li><li>「招聘情况」：主要招聘 Java、前端等岗位</li><li>「面试」 ：难度中等偏上，外企一般比较重视计算机基础知识。</li></ul><hr><p>对于杭州，我印象最深刻的就是在苏州上班时和同事去乌镇-杭州的三日游了，当时阿里还没有兴起，互联网环境也没有现在这般能卷。</p><p>顺带再聊聊杭州的房价、教育吧。杭州的房价不忍直视啊！！！涨的实在是太厉害了！</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/hangzhou-16.png" alt=""></p><p>杭州只有一所 985，也就是浙江大学。除了浙江大学之外，浙江省没有 211 院校。不过，杭州电子科技大学虽然不是 211，但是实力很强，外界也很认可。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/hangzhou-17.png" alt=""></p><blockquote><p>作者：大白，转载链接：<a href="https://mp.weixin.qq.com/s/hrL2tqXHT5AjOqrQlRhR-w" target="_blank" rel="noopener noreferrer">https://mp.weixin.qq.com/s/hrL2tqXHT5AjOqrQlRhR-w<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 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clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">六、求职面试</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">面试题集合</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">背诵版八股文</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">城市选择</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/cityselect/beijing.html" class="nav-link sidebar-link sidebar-page" aria-label="北京"><!---->北京<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/chengdu.html" class="nav-link sidebar-link sidebar-page" aria-label="成都"><!---->成都<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/guangzhou.html" class="nav-link sidebar-link sidebar-page" aria-label="广州"><!---->广州<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/hangzhou.html" class="nav-link sidebar-link sidebar-page" aria-label="杭州"><!---->杭州<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/nanjing.html" class="nav-link sidebar-link sidebar-page" aria-label="南京"><!---->南京<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/qingdao.html" class="nav-link sidebar-link sidebar-page" aria-label="青岛"><!---->青岛<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/shenzhen.html" class="nav-link sidebar-link sidebar-page" aria-label="深圳"><!---->深圳<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/suzhou.html" class="nav-link sidebar-link sidebar-page" aria-label="苏州"><!---->苏州<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/xian.html" class="nav-link sidebar-link sidebar-page" aria-label="西安"><!---->西安<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/zhengzhou.html" class="nav-link sidebar-link sidebar-page" aria-label="郑州"><!---->郑州<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/cityselect/jinan.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="济南"><!---->济南<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/jinan.html#part1-工作机会" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="Part1 工作机会"><!---->Part1 工作机会<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/jinan.html#阿里巴巴" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="阿里巴巴"><!---->阿里巴巴<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/jinan.html#浪潮" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="浪潮"><!---->浪潮<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/jinan.html#华为" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="华为"><!---->华为<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/jinan.html#海康威视" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="海康威视"><!---->海康威视<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/jinan.html#联通软件研究院" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="联通软件研究院"><!---->联通软件研究院<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/jinan.html#中国重汽" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="中国重汽"><!---->中国重汽<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/jinan.html#铁路局济南信息所" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="铁路局济南信息所"><!---->铁路局济南信息所<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/jinan.html#齐鲁空天信息研究院" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="齐鲁空天信息研究院"><!---->齐鲁空天信息研究院<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/jinan.html#part2-生活" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="Part2 生活"><!---->Part2 生活<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/jinan.html#房价" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="房价"><!---->房价<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/jinan.html#教育" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="教育"><!---->教育<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/jinan.html#风景-and-交通-and-美食" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="风景 and 交通 and 美食"><!---->风景 and 交通 and 美食<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li></ul><!--]--></li></ul></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->济南都有哪些值得加入的IT互联网公司？</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 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33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年6月11日</span><meta property="datePublished" content="2022-06-11T12:15:48.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category4" role>求职面试</li><meta property="articleSection" content="求职面试"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg 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class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/jinan.html#part1-工作机会" class="router-link-active router-link-exact-active toc-link level2">Part1 工作机会</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/jinan.html#阿里巴巴" class="router-link-active router-link-exact-active toc-link level3">阿里巴巴</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/jinan.html#浪潮" class="router-link-active router-link-exact-active toc-link level3">浪潮</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/jinan.html#华为" class="router-link-active router-link-exact-active toc-link level3">华为</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/jinan.html#海康威视" class="router-link-active router-link-exact-active toc-link level3">海康威视</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/jinan.html#联通软件研究院" class="router-link-active router-link-exact-active toc-link level3">联通软件研究院</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/jinan.html#中国重汽" class="router-link-active router-link-exact-active toc-link level3">中国重汽</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/jinan.html#铁路局济南信息所" class="router-link-active router-link-exact-active toc-link level3">铁路局济南信息所</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/jinan.html#齐鲁空天信息研究院" class="router-link-active router-link-exact-active toc-link level3">齐鲁空天信息研究院</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/jinan.html#part2-生活" class="router-link-active router-link-exact-active toc-link level2">Part2 生活</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/jinan.html#房价" class="router-link-active router-link-exact-active toc-link level3">房价</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/jinan.html#教育" class="router-link-active router-link-exact-active toc-link level3">教育</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/jinan.html#风景-and-交通-and-美食" class="router-link-active router-link-exact-active toc-link level3">风景 and 交通 and 美食</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h2 id="part1-工作机会" tabindex="-1"><a class="header-anchor" href="#part1-工作机会" aria-hidden="true">#</a> Part1 工作机会</h2><p>经过调查发现，济南的互联网环境是挺差的，大的公司几乎不会在济南成规模的招程序员。</p><p>如果你是一个应届毕业生，拿到济南阿里、华为、海康、铁路局等 offer 的话，想要离家近生活比较舒服那么值得去。其余的公司我不建议校招直接去，想去可以先去外面的大公司干几年，社招再回来。除非是没有更好的 offer。</p><p>另外，如果你想一直待在济南，不如去个有编制的地方，虽然我对技术有执念，但是也不得不承认在山东还是去个有编制的地方香。</p><h3 id="阿里巴巴" tabindex="-1"><a class="header-anchor" href="#阿里巴巴" aria-hidden="true">#</a> 阿里巴巴</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/jinan-52693980-e0eb-4781-94ca-fe15c0363410.png" alt=""></p><p>阿里巴巴在济南招开发的部门是本地生活，开发的业务是商家运营和餐饮供应链以及扫码点餐，薪资水平会比杭州北京等地低一些。因为阿里在济南就那么多人，所以 hc 的数量非常有限，我写这篇文章的时候又去阿里招聘网站上搜了下就没岗位信息了，大家有意的多盯着点。另外阿里云在济南也有岗位，不过这种岗位招的都是高 p，名额都是一个两个的招。</p><h3 id="浪潮" tabindex="-1"><a class="header-anchor" href="#浪潮" aria-hidden="true">#</a> 浪潮</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/jinan-e99080e9-a5ba-4016-b71c-1be1eb3d67ed.png" alt=""></p><p>济南是浪潮的大本营，浪潮在济南的岗位非常多，软件、硬件、算法都有。校招待遇方面受岗位和学历的影响很大，硕士会比本科生高一两千，算法，ic 类岗位的薪资会比软件开发多不少。月薪基本在 9-15k 之间， 如果你是本科且做软件开发，基本上就是 9-10k 了，好一些学校的硕士且岗位是算法之类的月薪差不多会在15k 左右。另外浪潮每月有加起来 1k 的房补，公积金满额。工作强度方面，浪潮加班很猛，但是除了法定节假日有加班费外，平时加班就没加班费了。</p><h3 id="华为" tabindex="-1"><a class="header-anchor" href="#华为" aria-hidden="true">#</a> 华为</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/jinan-f74af12b-73e1-4455-8ad9-1cecda84a21a.png" alt=""></p><p>对，你没看错，华为在济南是招开发岗的，不过 hc 不多。在济南的华为每年校招的 hc 就是个位数，社招想进去的话基本上就是通过华为 OD 了。</p><p>很多同学好奇华为OD 和华为正式 offer 的区别，我也就这个问题请教了下在华为工作的我的同学。听到的说法是，目前华为社招卡的很严，除非是 17 或 18 以上的高职级，否则都需要以 OD 的形式进华为。</p><p>如果你校招曾经拿过华为的 offer 但是没去，那么以后社招也是有可能直接给你正式 offer 的。华为 OD 是和外企德科签（外企德科这个名字确实有点逗，虽然他叫外企德科但是他不是外企），OD 和华为正式员工是同工同酬，不过没有股票，稳定性也和正式职工差点。</p><p>这点和软通动力、中软国际等派到华为工作的不太一样，软通动力和中软国际有一套自己的薪资体系。华为 OD 每年会有一次变成正式职工的机会。</p><p>济南这边的华为貌似是一个研发中心的分部（好像是南京研发中心的分部），公司注册地不在济南，无法领取济南市政府的人才补贴（硕士每月有一千左右的人才补贴）。我看济南这边有校招 14 级的同学爆料薪资是 19k x 14，其中每月有 4k 是绩效，公积金按工资的 5%交。</p><h3 id="海康威视" tabindex="-1"><a class="header-anchor" href="#海康威视" aria-hidden="true">#</a> 海康威视</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/jinan-60bc84b2-fd87-4c7a-bcb0-da6134786313.png" alt=""></p><p>海康威视也是济南程序员比较不错的去处了，硕士大部分月薪是 13k ，少量能到 15k，本科生进海康貌似统一价都是 9k，每年13-15 个月的薪资。每天有 45 的餐补，10块钱的交通补，通讯补贴每月 200。月薪的20% 是绩效，按基本工资的 12% 缴纳住房公积金。工作制度是大小周。虽然海康有很多槽点，但是技术还是不错的，有不少值得学习的地方，另外能在济南给到这个薪资，我觉得还是不错的。</p><h3 id="联通软件研究院" tabindex="-1"><a class="header-anchor" href="#联通软件研究院" aria-hidden="true">#</a> 联通软件研究院</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/jinan-d10a741e-bc19-4c92-b03d-9f7f295837d9.png" alt=""></p><p>目前看爆料济南的联通软件研究院情况的基本都是硕士，税前 9k（本科还要少一点），每年 15-16个月的薪资，额外还会有一些补贴。摆明说要加班，工作制度基本 996，且加班没有加班费。目前网上的评价不是太好。在所有的联通软件研究院里算比较卷的。</p><h3 id="中国重汽" tabindex="-1"><a class="header-anchor" href="#中国重汽" aria-hidden="true">#</a> 中国重汽</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/jinan-97191e20-997b-4203-9f23-1c761154bde8.png" alt=""></p><p>重汽招的软件开发的岗位也不少，校招进去月薪是 15-20k x 12，年终奖很少，就几千。另外第二年会把薪资的一部分转化成绩效，绩效不达标薪资就发不满了，相当于变相降薪。重汽虽然是国企，但不太像国企的作风，有末尾淘汰，周末经常加班。好像前几个月还要轮岗，上流水线跟工人一块组装汽车。</p><h3 id="铁路局济南信息所" tabindex="-1"><a class="header-anchor" href="#铁路局济南信息所" aria-hidden="true">#</a> 铁路局济南信息所</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/jinan-f6c82ef5-14a6-4c9c-8bc2-56b4b59c9152.png" alt=""></p><p>hr 说的税前年薪总包是 15 w，网上的信息比较少，盲猜风格应该和郑州铁路局的信息所差不多，应该是会有加班，但工作稳定。</p><h3 id="齐鲁空天信息研究院" tabindex="-1"><a class="header-anchor" href="#齐鲁空天信息研究院" aria-hidden="true">#</a> 齐鲁空天信息研究院</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/jinan-ea15afb0-62d8-4031-9c20-13a04da269d2.png" alt=""></p><p>薪资差不多是税前 12k x 14 的样子，但是每月工资里面一部分是绩效，如果项目不多的话绩效拿不满。另外出差很多，感觉性价比一般。</p><p>济南我了解到的大型的公司且招程序员的只有这么多了。倒是还有很多小型公司，大家可以在 boss 、拉钩等招聘网站直接搜，因为这些公司信息很少，我没了解到什么有效信息，就不介绍了。大家如果还知道哪些不错的济南的程序员的工作机会，也欢迎跟我说。对了，我了解到山东高速会招一些程序员，待遇不错，大家可以去详细了解下。</p><h2 id="part2-生活" tabindex="-1"><a class="header-anchor" href="#part2-生活" aria-hidden="true">#</a> Part2 生活</h2><h3 id="房价" tabindex="-1"><a class="header-anchor" href="#房价" aria-hidden="true">#</a> 房价</h3><p>相比于济南的工资水平，济南的房价真的是有点高啊。济南的房价前段时间一直跌，但目前在同类型二线城市中，依然算房价偏高的了。我在网上找了个图，不是太准，大家可以做个参考。在济南工资的背景下，在济南年轻人买房压力是挺大呀！</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/jinan-6f426bc3-7dbc-4bd8-91c1-4660a945a5f5.png" alt=""></p><h3 id="教育" tabindex="-1"><a class="header-anchor" href="#教育" aria-hidden="true">#</a> 教育</h3><p>教育上不用我多说，山东的教育真的是太卷了，山东的高考难度真的是地狱级。我身边的山东同学都学习挺不错的，也难怪，在山东杀出重围考上好一点大学的，当年在山东那都是英雄一般的人物。读研时带我的师兄，以及好几个关系不错的同学，还有我现在的组长都是山东的，他们都给我一种很努力，肯吃苦，且很踏实的感觉。我是挺喜欢和山东人相处的。</p><p>高校的计算机专业资源方面，感觉济南不如青岛，中国海洋大学和中国石油大学都在青岛，山东大学的计算机专业一部分也放在了青岛。这样感觉济南今后计算机人才的积累肯定不如青岛。所以计算机相关行业发展我还是更看好青岛了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/jinan-d222ea8c-6d83-4cd6-8cf7-3f7fd2fa1838.png" alt=""></p><h3 id="风景-and-交通-and-美食" tabindex="-1"><a class="header-anchor" href="#风景-and-交通-and-美食" aria-hidden="true">#</a> 风景 and 交通 and 美食</h3><p>济南的风景很漂亮，趵突泉，大明湖，黑虎泉，千佛山，百花洲这些景点都是我从小就听说过的，周末去转一转也是很惬意的事情。交通方面济南是挺堵的，感觉交通的规划上存在问题，所以刚上班租房的时候，宁可租的房子小一点，破一点，也要住的离公司近一点，不然上班时候堵车可真难顶。饮食方面，鲁菜爱倒酱油，口味会偏咸，不过济南对饭菜口味的包容性很强，各种菜系都能找到。</p><blockquote><p>作者：大白，转载链接：<a href="https://mp.weixin.qq.com/s/5rjqpY4Wxs0wEw7VuHXIpg" target="_blank" rel="noopener noreferrer">https://mp.weixin.qq.com/s/5rjqpY4Wxs0wEw7VuHXIpg<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><img 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href="/cityselect/nanjing.html#生活" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="生活"><!---->生活<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/nanjing.html#房价" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="房价"><!---->房价<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/nanjing.html#教育" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="教育"><!---->教育<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/nanjing.html#交通-风景-气候-美食" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="交通&amp;风景&amp;气候&amp;美食"><!---->交通&amp;风景&amp;气候&amp;美食<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li></ul><!--]--></li><li><!--[--><a href="/cityselect/qingdao.html" class="nav-link sidebar-link sidebar-page" aria-label="青岛有牛逼的互联网公司吗？"><!---->青岛有牛逼的互联网公司吗？<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/shenzhen.html" class="nav-link sidebar-link sidebar-page" aria-label="深圳有哪些牛批的互联网公司？"><!---->深圳有哪些牛批的互联网公司？<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/suzhou.html" class="nav-link sidebar-link sidebar-page" aria-label="想搬去苏州生活了。。"><!---->想搬去苏州生活了。。<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/xian.html" class="nav-link sidebar-link sidebar-page" aria-label="西安有哪些不错的互联网公司？"><!---->西安有哪些不错的互联网公司？<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/zhengzhou.html" class="nav-link sidebar-link sidebar-page" aria-label="郑州有哪些不错的互联网公司？"><!---->郑州有哪些不错的互联网公司？<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->南京有哪些靠谱的互联网公司？</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月27日</span><meta property="datePublished" content="2022-03-27T08:36:50.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category4" role>求职面试</li><meta property="articleSection" content="求职面试"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>城市选择</li></ul><meta property="keywords" content="城市选择"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 14 分钟</span><meta property="timeRequired" content="PT14M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/nanjing.html#私企" class="router-link-active router-link-exact-active toc-link level2">私企</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/nanjing.html#阿里巴巴" class="router-link-active router-link-exact-active toc-link level3">阿里巴巴</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/nanjing.html#字节跳动" class="router-link-active router-link-exact-active toc-link level3">字节跳动</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/nanjing.html#荣耀" class="router-link-active router-link-exact-active toc-link level3">荣耀</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/nanjing.html#华为" class="router-link-active router-link-exact-active toc-link level3">华为</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/nanjing.html#小米" class="router-link-active router-link-exact-active toc-link level3">小米</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/nanjing.html#vivo" class="router-link-active router-link-exact-active toc-link level3">Vivo</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/nanjing.html#oppo" class="router-link-active router-link-exact-active toc-link level3">OPPO</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/nanjing.html#中兴" class="router-link-active router-link-exact-active toc-link level3">中兴</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/nanjing.html#_360" class="router-link-active router-link-exact-active toc-link level3">360</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/nanjing.html#深信服" class="router-link-active router-link-exact-active toc-link level3">深信服</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/nanjing.html#趋势科技" class="router-link-active router-link-exact-active toc-link level3">趋势科技</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/nanjing.html#亚信安全" class="router-link-active router-link-exact-active toc-link level3">亚信安全</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/nanjing.html#shein" class="router-link-active router-link-exact-active toc-link level3">SHEIN</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/nanjing.html#满帮集团" class="router-link-active router-link-exact-active toc-link level3">满帮集团</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/nanjing.html#国企" class="router-link-active router-link-exact-active toc-link level2">国企</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/nanjing.html#中电系列" class="router-link-active router-link-exact-active toc-link level3">中电系列</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/nanjing.html#南瑞集团-国网电科院" class="router-link-active router-link-exact-active toc-link level3">南瑞集团（国网电科院）</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/nanjing.html#运营商" class="router-link-active router-link-exact-active toc-link level3">运营商</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/nanjing.html#烽火" class="router-link-active router-link-exact-active toc-link level3">烽火</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/nanjing.html#生活" class="router-link-active router-link-exact-active toc-link level2">生活</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/nanjing.html#房价" class="router-link-active router-link-exact-active toc-link level3">房价</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/nanjing.html#教育" class="router-link-active router-link-exact-active toc-link level3">教育</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/nanjing.html#交通-风景-气候-美食" class="router-link-active router-link-exact-active toc-link level3">交通&amp;风景&amp;气候&amp;美食</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="南京有哪些靠谱的互联网公司" tabindex="-1"><a class="header-anchor" href="#南京有哪些靠谱的互联网公司" aria-hidden="true">#</a> 南京有哪些靠谱的互联网公司？</h1><p>大家好呀，我是二哥。被读者催了好久，大白终于把南京的互联网公司调研完毕了，今天就赶紧给大家分享一波。南京是很有吸引力的一座城市， 20 年和纯洁的微笑、江南一点雨、cxuan 等一众人相约南京面基了三天，真心怀念。</p><p>有句话说的很对，“安徽不能没有南京，就像东北不能没有三亚”。不过调研中也发现，对于程序员来说，想要在南京留下也不是件很容易的事情，因为南京程序员的工作机会只能算一般，薪资水平这两年许多大公司选择在南京设立分部后才带起来一些，但是南京的房价已经很高了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-707d074e-def7-4cd3-af0a-84e46a0929a9.png" alt=""></p><p>提一下哈，在这个系列里说的校招薪资都是常规招聘计划的薪资，说的常规招聘计划给出的 offer 包含普通 offer，sp (special offer) 和 ssp。不包含那些比如华为天才少年、美团北斗之类的。那种神仙 offer 怎么样我这种凡人还真不了解。这些招聘的薪资也都是针对本科生和研究生的。如果你是博士，薪资方面和公司都好商量。</p><p>南京的信息感觉相对较少，调研过程中几次自闭。所以校招薪资大家就当个参考，不是特别的准确，不过公司整体的基调应该都反映出来了。</p><h2 id="私企" tabindex="-1"><a class="header-anchor" href="#私企" aria-hidden="true">#</a> 私企</h2><h3 id="阿里巴巴" tabindex="-1"><a class="header-anchor" href="#阿里巴巴" aria-hidden="true">#</a> 阿里巴巴</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-f55e084c-f731-419b-af71-278ac8e7b15c.png" alt=""></p><p>校招薪资：招的人不多，具体薪资情况不太清楚。据说和总部薪资水平差不多。阿里的薪资水平可以参考下<a href="https://mp.weixin.qq.com/s/3c-a7GpkTzAU2DFWSwN4lw" target="_blank" rel="noopener noreferrer">链接<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>。</p><p>个人评价：阿里巴巴在南京招人的部门主要是 CCO，阿里云也会有一些名额。岗位是挺齐全的，前端、后端、测试、算法都有。今年的校招 CCO 也就招了 20 个左右。</p><h3 id="字节跳动" tabindex="-1"><a class="header-anchor" href="#字节跳动" aria-hidden="true">#</a> 字节跳动</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-f945934a-3ab8-4272-a8b2-7001ea396377.png" alt=""></p><p>校招薪资：字节在南京的薪资是字节在北京上海深圳薪资的 0.9。感觉薪资水平挺不错了。今年字节校招薪资也可以点这个<a href="https://mp.weixin.qq.com/s/3c-a7GpkTzAU2DFWSwN4lw" target="_blank" rel="noopener noreferrer">链接<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>查看。</p><p>个人评价：南京这边字节的部门还是挺多的，游戏中台、客户端、数据平台、广告算法这些团队都在招人。团队也不能算边缘，在南京字节工作的话还是挺不错的。</p><h3 id="荣耀" tabindex="-1"><a class="header-anchor" href="#荣耀" aria-hidden="true">#</a> 荣耀</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-8470d707-53c6-4c07-8160-50759ad9d50b.png" alt=""></p><p>校招薪资：月薪 17k - 27k（对应13-15级），每年 14-16 薪。</p><p>个人评价：对于不太关注新闻的学生荣耀可能不太熟悉，今天展开介绍一下，你会发现接下来连着几家都是卖手机做通讯的。华为之前有荣耀手机的业务线，荣耀手机一直走价格较低的大众化路线，后来因为美国制裁，所以荣耀被拆了出来。目前荣耀大部分人员都是华为过来的，最近也在大量招人。所以荣耀目前可以看作一个翻版华为，各方面都是在学华为，但是后期能不能学的像就另说了。</p><p>荣耀和华为校招面试时方法一样，根据你面试的表现给你定级，然后通过所定的级别来和你谈薪。大部分本科生是13级，面试表现很好的话可能会定到 14 级。研究生大部分是 14级，一些面试表现一般的可能也会定到13级。15级基本上需要读书期间发过有含金量的论文或者参与过重大开源项目。南京荣耀工作制度基本上就是 996。</p><h3 id="华为" tabindex="-1"><a class="header-anchor" href="#华为" aria-hidden="true">#</a> 华为</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-f8ba1f60-c3bc-450b-b833-54db9bfdb807.png" alt=""></p><p>校招薪资：13级月薪 20-21k，14 级 23-25k，15级月薪 26-27k。每年 14-16 薪。16级我就不清楚了。</p><p>个人评价：感觉华为今年校招薪资水平提升了不少，我校招那年抠的要死，14a 才能给到 19k。要是今年这薪资水平我很可能就留到西安华为了，也就不北漂了。不过华为只给 5% 的公积金是有点低。感觉华为想要评到15级以上是需要你在读书期间有一些能证明你能力的东西，比如比较有含金量的论文，或者参与过重大的项目。如果手里没含金量的东西，靠面试表现来说最多也就是给到14级了。（反正我面试那年是这样）。华为对于部分特别牛逼的硕士会给到 16级。南京华为在几个研发中心算是加班比较少的，只是相对啊.</p><h3 id="小米" tabindex="-1"><a class="header-anchor" href="#小米" aria-hidden="true">#</a> 小米</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-bfb9cd80-f9b5-4ea7-b4f6-a15e54cf3c4b.png" alt=""></p><p>校招薪资：小米的薪资是挺抠，不过放在南京来看也还行。看校招薪水上南京的薪资爆料今年有 11k，14k，16k，18k，19k，21k，23k 几个档。11k，14k基本都是本科生，硕士做开发岗的大部分是16k，18k，19k这几个档。20k 以上的基本都是做算法的。</p><p>个人评价：南京的小米算是一个比较大的研发中心，有些小米比较核心的部门。南京小米大部分组周末双休是能保证的，周内上班到几点各组情况不一致，总体上就是 995 这么个情况。</p><h3 id="vivo" tabindex="-1"><a class="header-anchor" href="#vivo" aria-hidden="true">#</a> Vivo</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-7d676f6f-b081-4eb7-a2ce-3590a04b2fcd.png" alt=""></p><p>校招薪资：南京这边目前看到给应届生的价钱分为月薪17k，20k，24k三个档，，每年15薪。额外每个月有 1500 的租房补贴。住房公积金5%。</p><p>个人评价：之前 Vivo 是有大小周的（就是隔一周一次单休），去年九月份统一成双休了，工作制度差不多 995 或者 9105 的样子。周内就没时间干别的事了，不过 Vivo 这个薪资在南京确实算是还不错了。</p><h3 id="oppo" tabindex="-1"><a class="header-anchor" href="#oppo" aria-hidden="true">#</a> OPPO</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-9ad6c7fe-c486-4628-8e07-f21b3e2cac6d.png" alt=""></p><p>校招薪资：具体薪资不太清楚，大致应届生月薪在 20k 上下，每年 14 -15 个月薪资。</p><p>个人评价：OPPO 的薪资没调查清楚，信息比较少，不过应该和 VIVO 差不多。蓝绿两厂都是从步步高拆分出来的，两兄弟从薪资上以及工作模式上都很像。OPPO 和 VIVO 在南京都算是不错的选择。</p><h3 id="中兴" tabindex="-1"><a class="header-anchor" href="#中兴" aria-hidden="true">#</a> 中兴</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-094809df-30b0-40c6-a1a5-f1e0a5329b6a.png" alt=""></p><p>校招薪资：中兴常规计划（指的是普通 offer)的月薪基本都在20k 以内，蓝剑计划年薪会在 40w 以上。</p><p>个人评价：中兴这两年的竞争力一直处在一个下滑的状态，感觉蓝剑计划还不错，但是名额很少，一个部门只有一两个名额。当时中兴蓝剑计划来我们学校宣讲过，我和一个部门的 leader 下来聊了下，看了我的情况以后说常规批次的最高的 offer 给我没问题，但是蓝剑他们目前备选的两个人手上都有含金量很高的论文和项目，我和人家差距很明显。中兴常规招聘计划的 offer 和大部分大公司就没法比了。</p><h3 id="_360" tabindex="-1"><a class="header-anchor" href="#_360" aria-hidden="true">#</a> 360</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-0bec3704-902d-4b8b-90b7-4ab5fc28a79d.png" alt=""></p><p>校招薪资：没调查清楚，年薪差不多 23w 左右。</p><p>个人评价：南京360有建邺区和九龙湖两个办公区，九龙湖的业务比较核心。360 目前工作生活比较平衡，在介绍北京时详细介绍过 360，大家可以点这里进去看下，来北京 360 我还是比较推荐的。南京 360 主要做 toB 业务，目前南京 360 的状况不太好，还传出过南京业务团队会被撤掉的传言（这只是传言啊，真实性不是很高，但是也反映出 360 南京业务情况不太好）想要去的话大家自己一定要问清楚。</p><h3 id="深信服" tabindex="-1"><a class="header-anchor" href="#深信服" aria-hidden="true">#</a> 深信服</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-5041109f-e9d8-4419-9f41-466f93708c53.png" alt=""></p><p>校招薪资：开发岗有3个档，月薪分布在15.6 - 22.8k 这个区间，算法岗也是三个档，月薪分布在19 - 25.2k 这个区间。每年13 - 15 薪</p><p>个人评价：深信服总体来说加班挺严重的，不过南京的深信服相对深圳稍微好一点。比较好的就是深信服技术还不错，另外付出和收入成正比，其实大部分人不是吃不了苦，而是工作时付出和收入不成正比。</p><h3 id="趋势科技" tabindex="-1"><a class="header-anchor" href="#趋势科技" aria-hidden="true">#</a> 趋势科技</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-f60ae6ee-13d7-4efc-bd5a-a0334b76c6e3.png" alt=""></p><p>校招薪资：看到校招薪资爆料有三个档，分别是年薪 20w，23.5w 和 25w。</p><p>个人评价：趋势科技是一家外企，在南京很多年了，在安全方面做的不错。可以看出来，趋势科技的工资不算高（这个薪资在前两年还可以，但在今年各大厂校招薪资大涨的情况下就不太够看了），工资低伴随着公司很多技术大神流失。并且公司在20年底有次大的人员架构调整，也走了很多人。目前公司只是胜在工作轻松加班少了。</p><h3 id="亚信安全" tabindex="-1"><a class="header-anchor" href="#亚信安全" aria-hidden="true">#</a> 亚信安全</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-97e8edd1-2a4d-492c-9039-febbae881c05.png" alt=""></p><p>校招薪资：基本上月薪在15-18.5k 这个区间，每年 13- 15薪。</p><p>个人评价：亚信安全主要做运营商的项目。亚信科技知乎上被喷的还挺多的，不过亚信安全目前风评还可以，加班少些。</p><h3 id="shein" tabindex="-1"><a class="header-anchor" href="#shein" aria-hidden="true">#</a> SHEIN</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-fc7ddb5b-cbc1-482f-9087-ea9e3e136795.png" alt=""></p><p>校招薪资：目前看校招薪资爆料月薪基本集中在16-23k，有个说自己 27k 的不知道真的假的（如果是真的，感觉 SHEIN 大部分老员工要RUN了）。每年14薪。</p><p>个人评价：SHEIN 我曾经还拿过这家公司的 offer。公司做跨境电商的，主要卖女装。面试相对容易一些，基本就是问些常问的八股文，都没让我手撕代码。SHEIN 技术还行，一些拿不到大厂 offer 的同学，先去这里也还不错。另外就是我听说南京的 SHEIN 越来越卷了，不是曾经的 965 了。</p><h3 id="满帮集团" tabindex="-1"><a class="header-anchor" href="#满帮集团" aria-hidden="true">#</a> 满帮集团</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-ec98654b-0bcf-4e96-bb52-fe7ebd2a6c55.png" alt=""></p><p>校招薪资：校招薪水上的爆料开发月薪基本都在 20-30k 这个区间，算法基本都在 27-36k 这个区间。大部分人每年 14 薪。</p><p>个人评价：满帮就是南京的本土企业，主要是做货运业务的。南京这边能给出上面的薪资，确实难得，不过从给这么多钱就能看出来，加班肯定少不了。满帮目前招人挺多的。</p><h2 id="国企" tabindex="-1"><a class="header-anchor" href="#国企" aria-hidden="true">#</a> 国企</h2><h3 id="中电系列" tabindex="-1"><a class="header-anchor" href="#中电系列" aria-hidden="true">#</a> 中电系列</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-21fd091d-8afd-4cde-8fbd-a78b3c805085.png" alt=""></p><p>南京有中电 28 所、中电 14 所、中电 841 所。有一些读者跟我说想去研究所，想法是去研究所可以工作生活平衡。但是现在有很多的研究所其实很忙的，工作生活平衡的研究所尤其不包括南京这几个。841 所还不是特别清楚。大部分互联网公司和中电 28 所以及 14 所 比起来还真是弟弟，不过根据南京的薪资的水平来说，这两个所得福利待遇算是顶级了。刚毕业的应届生进去工资大概每月到手是一万出头吧，有食堂有宿舍，出差会有出差补贴，差不多一天三四百，这几个所出差会非常的多。</p><h3 id="南瑞集团-国网电科院" tabindex="-1"><a class="header-anchor" href="#南瑞集团-国网电科院" aria-hidden="true">#</a> 南瑞集团（国网电科院）</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-aff2d53a-95b6-4654-baac-ebc2ba39fc25.png" alt=""></p><p>南瑞集团是国家电网直属的科研企业单位，主要做电力系统自动化相关设备，所以会招很多程序员。年薪 14 万左右。南瑞要给各个省公司做电力软件，所以出差的情况会非常多。面试上南瑞以后你还没有国家电网编制，想要编制还要去参加电网的考试。感觉性价比一般，不如去省公司，听说省公司工资还挺高的。</p><h3 id="运营商" tabindex="-1"><a class="header-anchor" href="#运营商" aria-hidden="true">#</a> 运营商</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-6f4cd4bc-e1da-496c-bf00-7ef2e6089dee.png" alt=""></p><p>几个运营商里只有联通在南京有研究院专门做软件相关，除此之外想去运营商就只有省公司了。一些运营商的子公司我就不多介绍了，我是感觉国企的子公司性价比一般，既没有国企的稳定也没互联网的高薪。</p><h3 id="烽火" tabindex="-1"><a class="header-anchor" href="#烽火" aria-hidden="true">#</a> 烽火</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-d16dd7fe-f7a0-4f70-a016-f88350a56fa7.png" alt=""></p><p>简单说下烽火，下面有烽火星空还有烽火通信。是国企，不过感觉一直处于一个乙方的位置。项目很多是涉密项目，但是我劝大家尽量少碰涉密类型的项目。如果手头没大公司可以去烽火锻炼下，如果有其它大公司的 offer，我感觉还是优先其它大公司了。</p><h2 id="生活" tabindex="-1"><a class="header-anchor" href="#生活" aria-hidden="true">#</a> 生活</h2><h3 id="房价" tabindex="-1"><a class="header-anchor" href="#房价" aria-hidden="true">#</a> 房价</h3><p>房价这里想多说一点，有些还没毕业的同学问我应该怎么选择幸福感高的城市。其实我的感觉是你在一座城市的幸福感很大程度取决于你工资和房价的比值，其它因素都是次要的。平均下来你每月的工资接近你所在城市还可以的区域的房价，那么你生活的就很舒服。就比如你工资每月到手一万二三，你所在城市房价也一万二三或者稍多点，那你买房压力并不大。但是如果你所在城市房价很高，就比如北京。你每月到手两三万的工资已经很厉害了，然而像昌平差不多的地段房价都四万以上了，那你买房压力肯定很大，换而言之你生活的幸福感肯定不高。天天租房还和人合租，能有啥生活幸福感？当然对于那些想待几年学点东西就撤的同学另当别论哈，我说的是定居的考虑。</p><p>南京的房价还是比较高的，比较好的区域的房价直逼一线城市了，对于刚毕业的学生来说压力很大了，感觉这个房价应该逼走不少人。 另外南京物价也不低噢。下面这张图是网上找的，不一定准，可以当作参考。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-b5247968-f8fa-445a-b83e-7d88fbb056c7.png" alt=""></p><h3 id="教育" tabindex="-1"><a class="header-anchor" href="#教育" aria-hidden="true">#</a> 教育</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-61b6b641-72d1-45d2-be1e-463c7d1d7f9c.png" alt=""></p><p>南京高校资源方面很强。南京大学、东南大学、南航、河海大学、南理工等等都是很不错的学校。另外南邮、南京工业大学这些双非学校的计算机也很强。感觉近几年各个大厂陆续在南京设分布也是看中了南京有大量的计算机相关专业的毕业生。 江苏高考题的难是出了名的，当然江苏省的中小学教育资源也很优质，所以在教育这方面选择南京还是不错的。</p><h3 id="交通-风景-气候-美食" tabindex="-1"><a class="header-anchor" href="#交通-风景-气候-美食" aria-hidden="true">#</a> 交通&amp;风景&amp;气候&amp;美食</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-9da3efca-ceb7-4685-9932-6613ea2ea1c6.png" alt=""></p><p>南京拥堵程度是上过全国前十榜单的，我租房是喜欢宁愿住的小一点差一点也尽可能离上班地方近一点，我比较抗拒通勤。宏观上来说，南京的地理位置特别好，离苏州、杭州、上海都很近，另外离安徽也很近，这也是安徽人喜欢往南京跑的原因。</p><p>南京的风景不用多说，六朝古都的文化底蕴加上江南细腻的风景足够让人流连忘返，周末出去转一转还是挺令人放松的。</p><p>南京气候感觉不怎么好，很潮，另外南京到夏天总会下很大的雨，我同学本科在南京上的，校园经常就被淹了。</p><p>南京菜是挺有名的，南京菜比较杂，融合了很多地方的风味。大家应该都能找到适合自己口味的菜。</p><blockquote><p>作者：大白，转载链接：<a href="https://mp.weixin.qq.com/s/CfZ1CEmtPOP4TAwAs8Ocrw" target="_blank" rel="noopener noreferrer">https://mp.weixin.qq.com/s/CfZ1CEmtPOP4TAwAs8Ocrw<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new 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clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">六、求职面试</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">面试题集合</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">背诵版八股文</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">城市选择</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/cityselect/beijing.html" class="nav-link sidebar-link sidebar-page" aria-label="北京"><!---->北京<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/chengdu.html" class="nav-link sidebar-link sidebar-page" aria-label="成都"><!---->成都<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/guangzhou.html" class="nav-link sidebar-link sidebar-page" aria-label="广州"><!---->广州<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/hangzhou.html" class="nav-link sidebar-link sidebar-page" aria-label="杭州"><!---->杭州<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/cityselect/nanjing.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="南京"><!---->南京<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/nanjing.html#私企" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="私企"><!---->私企<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/nanjing.html#阿里巴巴" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="阿里巴巴"><!---->阿里巴巴<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/nanjing.html#字节跳动" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="字节跳动"><!---->字节跳动<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/nanjing.html#荣耀" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="荣耀"><!---->荣耀<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/nanjing.html#华为" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="华为"><!---->华为<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/nanjing.html#小米" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="小米"><!---->小米<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/nanjing.html#vivo" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="Vivo"><!---->Vivo<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/nanjing.html#oppo" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="OPPO"><!---->OPPO<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/nanjing.html#中兴" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="中兴"><!---->中兴<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/nanjing.html#_360" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="360"><!---->360<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/nanjing.html#深信服" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="深信服"><!---->深信服<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/nanjing.html#趋势科技" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="趋势科技"><!---->趋势科技<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/nanjing.html#亚信安全" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="亚信安全"><!---->亚信安全<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/nanjing.html#shein" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="SHEIN"><!---->SHEIN<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/nanjing.html#满帮集团" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="满帮集团"><!---->满帮集团<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/nanjing.html#国企" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="国企"><!---->国企<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/nanjing.html#中电系列" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="中电系列"><!---->中电系列<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/nanjing.html#南瑞集团-国网电科院" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="南瑞集团（国网电科院）"><!---->南瑞集团（国网电科院）<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/nanjing.html#运营商" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="运营商"><!---->运营商<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/nanjing.html#烽火" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="烽火"><!---->烽火<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/nanjing.html#生活" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="生活"><!---->生活<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/nanjing.html#房价" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="房价"><!---->房价<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/nanjing.html#教育" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="教育"><!---->教育<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/nanjing.html#交通-风景-气候-美食" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="交通&amp;风景&amp;气候&amp;美食"><!---->交通&amp;风景&amp;气候&amp;美食<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li></ul><!--]--></li><li><!--[--><a href="/cityselect/qingdao.html" class="nav-link sidebar-link sidebar-page" aria-label="青岛"><!---->青岛<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/shenzhen.html" class="nav-link sidebar-link sidebar-page" aria-label="深圳"><!---->深圳<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/suzhou.html" class="nav-link sidebar-link sidebar-page" aria-label="苏州"><!---->苏州<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/xian.html" class="nav-link sidebar-link sidebar-page" aria-label="西安"><!---->西安<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/zhengzhou.html" class="nav-link sidebar-link sidebar-page" aria-label="郑州"><!---->郑州<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/jinan.html" class="nav-link sidebar-link sidebar-page" aria-label="济南"><!---->济南<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->南京都有哪些值得加入的IT互联网公司？</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月27日</span><meta property="datePublished" content="2022-03-27T08:36:50.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category4" role>求职面试</li><meta property="articleSection" content="求职面试"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>城市选择</li></ul><meta property="keywords" content="城市选择"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 14 分钟</span><meta property="timeRequired" content="PT14M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/nanjing.html#私企" class="router-link-active router-link-exact-active toc-link level2">私企</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/nanjing.html#阿里巴巴" class="router-link-active router-link-exact-active toc-link level3">阿里巴巴</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/nanjing.html#字节跳动" class="router-link-active router-link-exact-active toc-link level3">字节跳动</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/nanjing.html#荣耀" class="router-link-active router-link-exact-active toc-link level3">荣耀</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/nanjing.html#华为" class="router-link-active router-link-exact-active toc-link level3">华为</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/nanjing.html#小米" class="router-link-active router-link-exact-active toc-link level3">小米</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/nanjing.html#vivo" class="router-link-active router-link-exact-active toc-link level3">Vivo</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/nanjing.html#oppo" class="router-link-active router-link-exact-active toc-link level3">OPPO</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/nanjing.html#中兴" class="router-link-active router-link-exact-active toc-link level3">中兴</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/nanjing.html#_360" class="router-link-active router-link-exact-active toc-link level3">360</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/nanjing.html#深信服" class="router-link-active router-link-exact-active toc-link level3">深信服</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/nanjing.html#趋势科技" class="router-link-active router-link-exact-active toc-link level3">趋势科技</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/nanjing.html#亚信安全" class="router-link-active router-link-exact-active toc-link level3">亚信安全</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/nanjing.html#shein" class="router-link-active router-link-exact-active toc-link level3">SHEIN</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/nanjing.html#满帮集团" class="router-link-active router-link-exact-active toc-link level3">满帮集团</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/nanjing.html#国企" class="router-link-active router-link-exact-active toc-link level2">国企</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/nanjing.html#中电系列" class="router-link-active router-link-exact-active toc-link level3">中电系列</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/nanjing.html#南瑞集团-国网电科院" class="router-link-active router-link-exact-active toc-link level3">南瑞集团（国网电科院）</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/nanjing.html#运营商" class="router-link-active router-link-exact-active toc-link level3">运营商</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/nanjing.html#烽火" class="router-link-active router-link-exact-active toc-link level3">烽火</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/nanjing.html#生活" class="router-link-active router-link-exact-active toc-link level2">生活</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/nanjing.html#房价" class="router-link-active router-link-exact-active toc-link level3">房价</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/nanjing.html#教育" class="router-link-active router-link-exact-active toc-link level3">教育</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/nanjing.html#交通-风景-气候-美食" class="router-link-active router-link-exact-active toc-link level3">交通&amp;风景&amp;气候&amp;美食</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="南京都有哪些值得加入的it互联网公司" tabindex="-1"><a class="header-anchor" href="#南京都有哪些值得加入的it互联网公司" aria-hidden="true">#</a> 南京都有哪些值得加入的IT互联网公司？</h1><p>大家好呀，我是二哥。被读者催了好久，大白终于把南京的互联网公司调研完毕了，今天就赶紧给大家分享一波。南京是很有吸引力的一座城市， 20 年和纯洁的微笑、江南一点雨、cxuan 等一众人相约南京面基了三天，真心怀念。</p><p>有句话说的很对，“安徽不能没有南京，就像东北不能没有三亚”。不过调研中也发现，对于程序员来说，想要在南京留下也不是件很容易的事情，因为南京程序员的工作机会只能算一般，薪资水平这两年许多大公司选择在南京设立分部后才带起来一些，但是南京的房价已经很高了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-707d074e-def7-4cd3-af0a-84e46a0929a9.png" alt=""></p><p>提一下哈，在这个系列里说的校招薪资都是常规招聘计划的薪资，说的常规招聘计划给出的 offer 包含普通 offer，sp (special offer) 和 ssp。不包含那些比如华为天才少年、美团北斗之类的。那种神仙 offer 怎么样我这种凡人还真不了解。这些招聘的薪资也都是针对本科生和研究生的。如果你是博士，薪资方面和公司都好商量。</p><p>南京的信息感觉相对较少，调研过程中几次自闭。所以校招薪资大家就当个参考，不是特别的准确，不过公司整体的基调应该都反映出来了。</p><h2 id="私企" tabindex="-1"><a class="header-anchor" href="#私企" aria-hidden="true">#</a> 私企</h2><h3 id="阿里巴巴" tabindex="-1"><a class="header-anchor" href="#阿里巴巴" aria-hidden="true">#</a> 阿里巴巴</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-f55e084c-f731-419b-af71-278ac8e7b15c.png" alt=""></p><p>校招薪资：招的人不多，具体薪资情况不太清楚。据说和总部薪资水平差不多。阿里的薪资水平可以参考下<a href="https://mp.weixin.qq.com/s/3c-a7GpkTzAU2DFWSwN4lw" target="_blank" rel="noopener noreferrer">链接<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>。</p><p>个人评价：阿里巴巴在南京招人的部门主要是 CCO，阿里云也会有一些名额。岗位是挺齐全的，前端、后端、测试、算法都有。今年的校招 CCO 也就招了 20 个左右。</p><h3 id="字节跳动" tabindex="-1"><a class="header-anchor" href="#字节跳动" aria-hidden="true">#</a> 字节跳动</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-f945934a-3ab8-4272-a8b2-7001ea396377.png" alt=""></p><p>校招薪资：字节在南京的薪资是字节在北京上海深圳薪资的 0.9。感觉薪资水平挺不错了。今年字节校招薪资也可以点这个<a href="https://mp.weixin.qq.com/s/3c-a7GpkTzAU2DFWSwN4lw" target="_blank" rel="noopener noreferrer">链接<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>查看。</p><p>个人评价：南京这边字节的部门还是挺多的，游戏中台、客户端、数据平台、广告算法这些团队都在招人。团队也不能算边缘，在南京字节工作的话还是挺不错的。</p><h3 id="荣耀" tabindex="-1"><a class="header-anchor" href="#荣耀" aria-hidden="true">#</a> 荣耀</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-8470d707-53c6-4c07-8160-50759ad9d50b.png" alt=""></p><p>校招薪资：月薪 17k - 27k（对应13-15级），每年 14-16 薪。</p><p>个人评价：对于不太关注新闻的学生荣耀可能不太熟悉，今天展开介绍一下，你会发现接下来连着几家都是卖手机做通讯的。华为之前有荣耀手机的业务线，荣耀手机一直走价格较低的大众化路线，后来因为美国制裁，所以荣耀被拆了出来。目前荣耀大部分人员都是华为过来的，最近也在大量招人。所以荣耀目前可以看作一个翻版华为，各方面都是在学华为，但是后期能不能学的像就另说了。</p><p>荣耀和华为校招面试时方法一样，根据你面试的表现给你定级，然后通过所定的级别来和你谈薪。大部分本科生是13级，面试表现很好的话可能会定到 14 级。研究生大部分是 14级，一些面试表现一般的可能也会定到13级。15级基本上需要读书期间发过有含金量的论文或者参与过重大开源项目。南京荣耀工作制度基本上就是 996。</p><h3 id="华为" tabindex="-1"><a class="header-anchor" href="#华为" aria-hidden="true">#</a> 华为</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-f8ba1f60-c3bc-450b-b833-54db9bfdb807.png" alt=""></p><p>校招薪资：13级月薪 20-21k，14 级 23-25k，15级月薪 26-27k。每年 14-16 薪。16级我就不清楚了。</p><p>个人评价：感觉华为今年校招薪资水平提升了不少，我校招那年抠的要死，14a 才能给到 19k。要是今年这薪资水平我很可能就留到西安华为了，也就不北漂了。不过华为只给 5% 的公积金是有点低。感觉华为想要评到15级以上是需要你在读书期间有一些能证明你能力的东西，比如比较有含金量的论文，或者参与过重大的项目。如果手里没含金量的东西，靠面试表现来说最多也就是给到14级了。（反正我面试那年是这样）。华为对于部分特别牛逼的硕士会给到 16级。南京华为在几个研发中心算是加班比较少的，只是相对啊.</p><h3 id="小米" tabindex="-1"><a class="header-anchor" href="#小米" aria-hidden="true">#</a> 小米</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-bfb9cd80-f9b5-4ea7-b4f6-a15e54cf3c4b.png" alt=""></p><p>校招薪资：小米的薪资是挺抠，不过放在南京来看也还行。看校招薪水上南京的薪资爆料今年有 11k，14k，16k，18k，19k，21k，23k 几个档。11k，14k基本都是本科生，硕士做开发岗的大部分是16k，18k，19k这几个档。20k 以上的基本都是做算法的。</p><p>个人评价：南京的小米算是一个比较大的研发中心，有些小米比较核心的部门。南京小米大部分组周末双休是能保证的，周内上班到几点各组情况不一致，总体上就是 995 这么个情况。</p><h3 id="vivo" tabindex="-1"><a class="header-anchor" href="#vivo" aria-hidden="true">#</a> Vivo</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-7d676f6f-b081-4eb7-a2ce-3590a04b2fcd.png" alt=""></p><p>校招薪资：南京这边目前看到给应届生的价钱分为月薪17k，20k，24k三个档，，每年15薪。额外每个月有 1500 的租房补贴。住房公积金5%。</p><p>个人评价：之前 Vivo 是有大小周的（就是隔一周一次单休），去年九月份统一成双休了，工作制度差不多 995 或者 9105 的样子。周内就没时间干别的事了，不过 Vivo 这个薪资在南京确实算是还不错了。</p><h3 id="oppo" tabindex="-1"><a class="header-anchor" href="#oppo" aria-hidden="true">#</a> OPPO</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-9ad6c7fe-c486-4628-8e07-f21b3e2cac6d.png" alt=""></p><p>校招薪资：具体薪资不太清楚，大致应届生月薪在 20k 上下，每年 14 -15 个月薪资。</p><p>个人评价：OPPO 的薪资没调查清楚，信息比较少，不过应该和 VIVO 差不多。蓝绿两厂都是从步步高拆分出来的，两兄弟从薪资上以及工作模式上都很像。OPPO 和 VIVO 在南京都算是不错的选择。</p><h3 id="中兴" tabindex="-1"><a class="header-anchor" href="#中兴" aria-hidden="true">#</a> 中兴</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-094809df-30b0-40c6-a1a5-f1e0a5329b6a.png" alt=""></p><p>校招薪资：中兴常规计划（指的是普通 offer)的月薪基本都在20k 以内，蓝剑计划年薪会在 40w 以上。</p><p>个人评价：中兴这两年的竞争力一直处在一个下滑的状态，感觉蓝剑计划还不错，但是名额很少，一个部门只有一两个名额。当时中兴蓝剑计划来我们学校宣讲过，我和一个部门的 leader 下来聊了下，看了我的情况以后说常规批次的最高的 offer 给我没问题，但是蓝剑他们目前备选的两个人手上都有含金量很高的论文和项目，我和人家差距很明显。中兴常规招聘计划的 offer 和大部分大公司就没法比了。</p><h3 id="_360" tabindex="-1"><a class="header-anchor" href="#_360" aria-hidden="true">#</a> 360</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-0bec3704-902d-4b8b-90b7-4ab5fc28a79d.png" alt=""></p><p>校招薪资：没调查清楚，年薪差不多 23w 左右。</p><p>个人评价：南京360有建邺区和九龙湖两个办公区，九龙湖的业务比较核心。360 目前工作生活比较平衡，在介绍北京时详细介绍过 360，大家可以点这里进去看下，来北京 360 我还是比较推荐的。南京 360 主要做 toB 业务，目前南京 360 的状况不太好，还传出过南京业务团队会被撤掉的传言（这只是传言啊，真实性不是很高，但是也反映出 360 南京业务情况不太好）想要去的话大家自己一定要问清楚。</p><h3 id="深信服" tabindex="-1"><a class="header-anchor" href="#深信服" aria-hidden="true">#</a> 深信服</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-5041109f-e9d8-4419-9f41-466f93708c53.png" alt=""></p><p>校招薪资：开发岗有3个档，月薪分布在15.6 - 22.8k 这个区间，算法岗也是三个档，月薪分布在19 - 25.2k 这个区间。每年13 - 15 薪</p><p>个人评价：深信服总体来说加班挺严重的，不过南京的深信服相对深圳稍微好一点。比较好的就是深信服技术还不错，另外付出和收入成正比，其实大部分人不是吃不了苦，而是工作时付出和收入不成正比。</p><h3 id="趋势科技" tabindex="-1"><a class="header-anchor" href="#趋势科技" aria-hidden="true">#</a> 趋势科技</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-f60ae6ee-13d7-4efc-bd5a-a0334b76c6e3.png" alt=""></p><p>校招薪资：看到校招薪资爆料有三个档，分别是年薪 20w，23.5w 和 25w。</p><p>个人评价：趋势科技是一家外企，在南京很多年了，在安全方面做的不错。可以看出来，趋势科技的工资不算高（这个薪资在前两年还可以，但在今年各大厂校招薪资大涨的情况下就不太够看了），工资低伴随着公司很多技术大神流失。并且公司在20年底有次大的人员架构调整，也走了很多人。目前公司只是胜在工作轻松加班少了。</p><h3 id="亚信安全" tabindex="-1"><a class="header-anchor" href="#亚信安全" aria-hidden="true">#</a> 亚信安全</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-97e8edd1-2a4d-492c-9039-febbae881c05.png" alt=""></p><p>校招薪资：基本上月薪在15-18.5k 这个区间，每年 13- 15薪。</p><p>个人评价：亚信安全主要做运营商的项目。亚信科技知乎上被喷的还挺多的，不过亚信安全目前风评还可以，加班少些。</p><h3 id="shein" tabindex="-1"><a class="header-anchor" href="#shein" aria-hidden="true">#</a> SHEIN</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-fc7ddb5b-cbc1-482f-9087-ea9e3e136795.png" alt=""></p><p>校招薪资：目前看校招薪资爆料月薪基本集中在16-23k，有个说自己 27k 的不知道真的假的（如果是真的，感觉 SHEIN 大部分老员工要RUN了）。每年14薪。</p><p>个人评价：SHEIN 我曾经还拿过这家公司的 offer。公司做跨境电商的，主要卖女装。面试相对容易一些，基本就是问些常问的八股文，都没让我手撕代码。SHEIN 技术还行，一些拿不到大厂 offer 的同学，先去这里也还不错。另外就是我听说南京的 SHEIN 越来越卷了，不是曾经的 965 了。</p><h3 id="满帮集团" tabindex="-1"><a class="header-anchor" href="#满帮集团" aria-hidden="true">#</a> 满帮集团</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-ec98654b-0bcf-4e96-bb52-fe7ebd2a6c55.png" alt=""></p><p>校招薪资：校招薪水上的爆料开发月薪基本都在 20-30k 这个区间，算法基本都在 27-36k 这个区间。大部分人每年 14 薪。</p><p>个人评价：满帮就是南京的本土企业，主要是做货运业务的。南京这边能给出上面的薪资，确实难得，不过从给这么多钱就能看出来，加班肯定少不了。满帮目前招人挺多的。</p><h2 id="国企" tabindex="-1"><a class="header-anchor" href="#国企" aria-hidden="true">#</a> 国企</h2><h3 id="中电系列" tabindex="-1"><a class="header-anchor" href="#中电系列" aria-hidden="true">#</a> 中电系列</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-21fd091d-8afd-4cde-8fbd-a78b3c805085.png" alt=""></p><p>南京有中电 28 所、中电 14 所、中电 841 所。有一些读者跟我说想去研究所，想法是去研究所可以工作生活平衡。但是现在有很多的研究所其实很忙的，工作生活平衡的研究所尤其不包括南京这几个。841 所还不是特别清楚。大部分互联网公司和中电 28 所以及 14 所 比起来还真是弟弟，不过根据南京的薪资的水平来说，这两个所得福利待遇算是顶级了。刚毕业的应届生进去工资大概每月到手是一万出头吧，有食堂有宿舍，出差会有出差补贴，差不多一天三四百，这几个所出差会非常的多。</p><h3 id="南瑞集团-国网电科院" tabindex="-1"><a class="header-anchor" href="#南瑞集团-国网电科院" aria-hidden="true">#</a> 南瑞集团（国网电科院）</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-aff2d53a-95b6-4654-baac-ebc2ba39fc25.png" alt=""></p><p>南瑞集团是国家电网直属的科研企业单位，主要做电力系统自动化相关设备，所以会招很多程序员。年薪 14 万左右。南瑞要给各个省公司做电力软件，所以出差的情况会非常多。面试上南瑞以后你还没有国家电网编制，想要编制还要去参加电网的考试。感觉性价比一般，不如去省公司，听说省公司工资还挺高的。</p><h3 id="运营商" tabindex="-1"><a class="header-anchor" href="#运营商" aria-hidden="true">#</a> 运营商</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-6f4cd4bc-e1da-496c-bf00-7ef2e6089dee.png" alt=""></p><p>几个运营商里只有联通在南京有研究院专门做软件相关，除此之外想去运营商就只有省公司了。一些运营商的子公司我就不多介绍了，我是感觉国企的子公司性价比一般，既没有国企的稳定也没互联网的高薪。</p><h3 id="烽火" tabindex="-1"><a class="header-anchor" href="#烽火" aria-hidden="true">#</a> 烽火</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-d16dd7fe-f7a0-4f70-a016-f88350a56fa7.png" alt=""></p><p>简单说下烽火，下面有烽火星空还有烽火通信。是国企，不过感觉一直处于一个乙方的位置。项目很多是涉密项目，但是我劝大家尽量少碰涉密类型的项目。如果手头没大公司可以去烽火锻炼下，如果有其它大公司的 offer，我感觉还是优先其它大公司了。</p><h2 id="生活" tabindex="-1"><a class="header-anchor" href="#生活" aria-hidden="true">#</a> 生活</h2><h3 id="房价" tabindex="-1"><a class="header-anchor" href="#房价" aria-hidden="true">#</a> 房价</h3><p>房价这里想多说一点，有些还没毕业的同学问我应该怎么选择幸福感高的城市。其实我的感觉是你在一座城市的幸福感很大程度取决于你工资和房价的比值，其它因素都是次要的。平均下来你每月的工资接近你所在城市还可以的区域的房价，那么你生活的就很舒服。就比如你工资每月到手一万二三，你所在城市房价也一万二三或者稍多点，那你买房压力并不大。但是如果你所在城市房价很高，就比如北京。你每月到手两三万的工资已经很厉害了，然而像昌平差不多的地段房价都四万以上了，那你买房压力肯定很大，换而言之你生活的幸福感肯定不高。天天租房还和人合租，能有啥生活幸福感？当然对于那些想待几年学点东西就撤的同学另当别论哈，我说的是定居的考虑。</p><p>南京的房价还是比较高的，比较好的区域的房价直逼一线城市了，对于刚毕业的学生来说压力很大了，感觉这个房价应该逼走不少人。 另外南京物价也不低噢。下面这张图是网上找的，不一定准，可以当作参考。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-b5247968-f8fa-445a-b83e-7d88fbb056c7.png" alt=""></p><h3 id="教育" tabindex="-1"><a class="header-anchor" href="#教育" aria-hidden="true">#</a> 教育</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-61b6b641-72d1-45d2-be1e-463c7d1d7f9c.png" alt=""></p><p>南京高校资源方面很强。南京大学、东南大学、南航、河海大学、南理工等等都是很不错的学校。另外南邮、南京工业大学这些双非学校的计算机也很强。感觉近几年各个大厂陆续在南京设分布也是看中了南京有大量的计算机相关专业的毕业生。 江苏高考题的难是出了名的，当然江苏省的中小学教育资源也很优质，所以在教育这方面选择南京还是不错的。</p><h3 id="交通-风景-气候-美食" tabindex="-1"><a class="header-anchor" href="#交通-风景-气候-美食" aria-hidden="true">#</a> 交通&amp;风景&amp;气候&amp;美食</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/nanjing-9da3efca-ceb7-4685-9932-6613ea2ea1c6.png" alt=""></p><p>南京拥堵程度是上过全国前十榜单的，我租房是喜欢宁愿住的小一点差一点也尽可能离上班地方近一点，我比较抗拒通勤。宏观上来说，南京的地理位置特别好，离苏州、杭州、上海都很近，另外离安徽也很近，这也是安徽人喜欢往南京跑的原因。</p><p>南京的风景不用多说，六朝古都的文化底蕴加上江南细腻的风景足够让人流连忘返，周末出去转一转还是挺令人放松的。</p><p>南京气候感觉不怎么好，很潮，另外南京到夏天总会下很大的雨，我同学本科在南京上的，校园经常就被淹了。</p><p>南京菜是挺有名的，南京菜比较杂，融合了很多地方的风味。大家应该都能找到适合自己口味的菜。</p><blockquote><p>作者：大白，转载链接：<a href="https://mp.weixin.qq.com/s/CfZ1CEmtPOP4TAwAs8Ocrw" target="_blank" rel="noopener noreferrer">https://mp.weixin.qq.com/s/CfZ1CEmtPOP4TAwAs8Ocrw<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new 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aria-current="page" href="/cityselect/qingdao.html#工作机会" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="工作机会"><!---->工作机会<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/qingdao.html#海尔" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="海尔"><!---->海尔<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/qingdao.html#海信" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="海信"><!---->海信<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/qingdao.html#光大银行青岛研发中心" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="光大银行青岛研发中心"><!---->光大银行青岛研发中心<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/qingdao.html#青岛银行" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="青岛银行"><!---->青岛银行<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/qingdao.html#青岛凯亚" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="青岛凯亚"><!---->青岛凯亚<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/qingdao.html#青岛鼎信" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="青岛鼎信"><!---->青岛鼎信<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/qingdao.html#yeelight" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="Yeelight"><!---->Yeelight<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/qingdao.html#中车四方" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="中车四方"><!---->中车四方<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/qingdao.html#中电41所" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="中电41所"><!---->中电41所<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/qingdao.html#生活" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="生活"><!---->生活<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/qingdao.html#房价" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="房价"><!---->房价<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/qingdao.html#教育" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="教育"><!---->教育<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/qingdao.html#风景-美食" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="风景&amp;美食"><!---->风景&amp;美食<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/qingdao.html#交通" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="交通"><!---->交通<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li></ul><!--]--></li><li><!--[--><a href="/cityselect/shenzhen.html" class="nav-link sidebar-link sidebar-page" aria-label="深圳有哪些牛批的互联网公司？"><!---->深圳有哪些牛批的互联网公司？<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/suzhou.html" class="nav-link sidebar-link sidebar-page" aria-label="想搬去苏州生活了。。"><!---->想搬去苏州生活了。。<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/xian.html" class="nav-link sidebar-link sidebar-page" aria-label="西安有哪些不错的互联网公司？"><!---->西安有哪些不错的互联网公司？<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/zhengzhou.html" class="nav-link sidebar-link sidebar-page" aria-label="郑州有哪些不错的互联网公司？"><!---->郑州有哪些不错的互联网公司？<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->青岛有牛逼的互联网公司吗？</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月27日</span><meta property="datePublished" content="2022-03-27T08:36:50.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category4" role>求职面试</li><meta property="articleSection" content="求职面试"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>城市选择</li></ul><meta property="keywords" content="城市选择"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 7 分钟</span><meta property="timeRequired" content="PT7M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/qingdao.html#工作机会" class="router-link-active router-link-exact-active toc-link level2">工作机会</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/qingdao.html#海尔" class="router-link-active router-link-exact-active toc-link level3">海尔</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/qingdao.html#海信" class="router-link-active router-link-exact-active toc-link level3">海信</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/qingdao.html#光大银行青岛研发中心" class="router-link-active router-link-exact-active toc-link level3">光大银行青岛研发中心</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/qingdao.html#青岛银行" class="router-link-active router-link-exact-active toc-link level3">青岛银行</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/qingdao.html#青岛凯亚" class="router-link-active router-link-exact-active toc-link level3">青岛凯亚</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/qingdao.html#青岛鼎信" class="router-link-active router-link-exact-active toc-link level3">青岛鼎信</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/qingdao.html#yeelight" class="router-link-active router-link-exact-active toc-link level3">Yeelight</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/qingdao.html#中车四方" class="router-link-active router-link-exact-active toc-link level3">中车四方</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/qingdao.html#中电41所" class="router-link-active router-link-exact-active toc-link level3">中电41所</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/qingdao.html#生活" class="router-link-active router-link-exact-active toc-link level2">生活</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/qingdao.html#房价" class="router-link-active router-link-exact-active toc-link level3">房价</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/qingdao.html#教育" class="router-link-active router-link-exact-active toc-link level3">教育</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/qingdao.html#风景-美食" class="router-link-active router-link-exact-active toc-link level3">风景&amp;美食</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/qingdao.html#交通" class="router-link-active router-link-exact-active toc-link level3">交通</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="青岛有牛逼的互联网公司吗" tabindex="-1"><a class="header-anchor" href="#青岛有牛逼的互联网公司吗" aria-hidden="true">#</a> 青岛有牛逼的互联网公司吗？</h1><p>上次发了郑州都有哪些好的互联网公司后，意外地发现青岛的呼声挺高，再加上我之前去青岛旅游过一次，对青岛的印象特别好，所以今天就来把青岛安排上。</p><p>当时我妹还在沙滩上留了一张“沉默王二在青岛”的印迹。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/qingdao-938dc8a2-9b47-4e12-aa45-79c2caf94f04.png" alt=""></p><p>按照我妹的说法，“青岛真是一座网红城市，美女是真多！”</p><p>如果在海边有几套房，租出去，再有一个编制的好工作，简直在青岛的生活不要太惬意！下面我就把招程序员的公司来捋一遍吧。</p><h2 id="工作机会" tabindex="-1"><a class="header-anchor" href="#工作机会" aria-hidden="true">#</a> 工作机会</h2><p>青岛软件行业的发展太滞后了，没有大规模的软件公司，做软件的公司大部分都是外包公司，而且规模还很小。</p><h3 id="海尔" tabindex="-1"><a class="header-anchor" href="#海尔" aria-hidden="true">#</a> 海尔</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/qingdao-e656449e-a34f-4915-a1cb-459208d23e34.png" alt=""></p><p>海尔在青岛多年了，曾经有段辉煌期的。我舍友带着我在山东哈酒时，一个老大哥在酒桌上就跟我们聊起来，说他当初在海尔买家都是要请他们吃饭才卖给产品的。不过近些年海尔就不太行了，但依然在青岛是个工作上的好选择。海尔 Java 岗位给应届 985 硕士的报价是年薪 14 万。本科生相对少一点，年薪大概在 8万 到 12万 左右。我路过海尔时感觉海尔的园区还修的挺漂亮的。另外说一句，感觉海尔卡奥斯还行，在工业互联网领域做的还可以。</p><h3 id="海信" tabindex="-1"><a class="header-anchor" href="#海信" aria-hidden="true">#</a> 海信</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/qingdao-9645cf8d-d9dc-4de7-a192-bdb9a447ec49.png" alt=""></p><p>我之前总觉得海信和海尔有某种联系，不过我查了下并没有，路过海信的园区时觉得海信也修的挺漂亮的。一个 211 硕士爆料的薪资是每月 10k，然后一年 13 个月工资。福利待遇方面感觉还可以，前两年有免费宿舍，交通补贴每月 200，住房补贴 800 每月，可以领三年。试用期 6 个月，试用期间 90% 薪资，免费班车，公积金 10%，社保全额。工作早9晚6，中午休息一小时。</p><p>另外就是如果还是喜欢互联网氛围的话去海信聚好看比较好，就是海信电视上那个 APP ，听说技术还不错，给的工资也相对较高。不过加班多啊。</p><h3 id="光大银行青岛研发中心" tabindex="-1"><a class="header-anchor" href="#光大银行青岛研发中心" aria-hidden="true">#</a> 光大银行青岛研发中心</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/qingdao-7351e8f8-90d5-4f3c-998a-703b36ec1fca.png" alt=""></p><p>待遇听说还不错，以前是归分行管，现在归总行管。青岛这边主要开发云缴费业务。据说是有末尾淘汰机制。近几年好多员工都跑到青岛银行了。</p><h3 id="青岛银行" tabindex="-1"><a class="header-anchor" href="#青岛银行" aria-hidden="true">#</a> 青岛银行</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/qingdao-cc5091a0-28ad-4439-8718-a6b79e80ef83.png" alt=""></p><p>青岛银行总行的技术岗。薪资不算高，有薪资爆料是年薪12w，不过算是摸鱼的天堂了，活大部分是外包干。</p><h3 id="青岛凯亚" tabindex="-1"><a class="header-anchor" href="#青岛凯亚" aria-hidden="true">#</a> 青岛凯亚</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/qingdao-9fcaebb9-fcf0-4b34-8302-c0be931ae1ce.png" alt=""></p><p>在青岛软件企业能算中上游了，不过全靠同行衬托。加上各种补贴，一年的工资差不多是是十二三万吧。试用期工资打五六折。技术还可以，不过有人爆料说他加班还挺多的。</p><h3 id="青岛鼎信" tabindex="-1"><a class="header-anchor" href="#青岛鼎信" aria-hidden="true">#</a> 青岛鼎信</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/qingdao-f941c172-1ff2-40ce-bea0-8cb52a030bf3.png" alt=""></p><p>主要做通信的公司，一个应届硕士的爆料是税前13k，每年13个月的工资，有食堂，每个月600的饭补。</p><h3 id="yeelight" tabindex="-1"><a class="header-anchor" href="#yeelight" aria-hidden="true">#</a> Yeelight</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/qingdao-7f88980b-d21e-4b27-9306-f911eb8a02e6.png" alt=""></p><p>Yeelight 算是在青岛为数不多的小而美的公司了，目前团队330人，研发人员超过一半，主要做智能照明，有小米的投资。听说团队氛围还不错，比较重视技术。我在网上没找到校招待遇的介绍，社招的话 BOSS 招聘 3-5年 Java 经验的报价是 12k-24k。</p><h3 id="中车四方" tabindex="-1"><a class="header-anchor" href="#中车四方" aria-hidden="true">#</a> 中车四方</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/qingdao-f75fc5b3-2587-42d5-a80f-592a49c515eb.png" alt=""></p><p>中车四方是国有控股公司，薪资待遇在青岛算中上。也招程序员。应届毕业生是6个月试用期，转正以后每年工资税前差不多15w左右。不过他这个工资构成和别人不一样呀。每月税前一万左右的工资好像其中六千左右是绩效，然后每年年中会发一个业绩奖金，不同部门的奖金差别很大。</p><h3 id="中电41所" tabindex="-1"><a class="header-anchor" href="#中电41所" aria-hidden="true">#</a> 中电41所</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/qingdao-53f614bb-d10d-4ae2-9f83-5911ef8ddead.png" alt=""></p><p>说实话，我一直对中电系列的研究所印象不是很好，不过听说中电28所的薪资后对中电系列的印象有所改观（这里是闲扯一句哈，中电28所在南京，和青岛没啥关系）。注意41所得总部是在安徽，青岛只是一个分部，我了解到是加班会比较严重。</p><p>好嘛，好不容易凑出来这几个程序员的工作机会，大家要是还知道一些比较好的工作机会，欢迎来补充呀。</p><h2 id="生活" tabindex="-1"><a class="header-anchor" href="#生活" aria-hidden="true">#</a> 生活</h2><h3 id="房价" tabindex="-1"><a class="header-anchor" href="#房价" aria-hidden="true">#</a> 房价</h3><p>青岛房均价两万多了吧。崂山和市南比较贵，其它地相对好一些。下面这张图有各区的房价，不是太准，不过可以参考下呀。感觉程序员在北京干几年，攒个首付，然后回青岛找个相对稳定的公司上班，买房压力还不是很大（除了买崂山和市南啊）。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/qingdao-a228e29e-363f-44a3-b8cc-6cdd18d34b9f.png" alt=""></p><h3 id="教育" tabindex="-1"><a class="header-anchor" href="#教育" aria-hidden="true">#</a> 教育</h3><p>感觉青岛的教育方面很不错。</p><p>大学方面，山东大学在青岛是有校区的，虽然离市区是真的远，但是人家有地铁呀。我记得坐那趟地铁去山东大学青岛校区找我舍友时穿越崂山，窗外的风景是真的漂亮。中国海洋大学也是一所985，校区是真的漂亮。中国石油大学是一所211，也挺不错的。另外像青岛大学、青岛理工大学、山东科技大学这些院校也是不错的。这几年各个高校也在青岛修建了研究院，感觉还是挺有发展前景的。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/qingdao-b37788d7-c33d-475a-bc69-05927bf0825d.png" alt=""></p><p>高中方面，青岛二中、青岛一中、青岛五十八中、青岛九中、即墨一中等都非常好。不过山东高考的压力是真的大，感觉我大学和读研时身边的山东同学，当年高考都是英雄般的人物。</p><h3 id="风景-美食" tabindex="-1"><a class="header-anchor" href="#风景-美食" aria-hidden="true">#</a> 风景&amp;美食</h3><p>青岛是真的挺美的，感觉在青岛既能感觉到现代化大都市的感觉、又能体验到民国风情还能体验到欧式风情。另外我同学带我在青岛转时，经常走着走着就见到了大海，这让我这个多年身居内陆，没见过海的少年来说还是挺欣喜的。感觉青岛比西安冷很多，今年4月西安已经很热了，花都开了，但是去了青岛以后发现柳树才刚有一点点绿，还挺凉快的。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/qingdao-d619e60b-732b-497f-a4a0-ebbad7ce1ce9.png" alt=""></p><p>青岛的海鲜是挺丰富了，让我这个很少吃海鲜的少年一次吃了个够，还买了些海鲜给家里面寄了点。果然内陆的海鲜吃起来和沿海城市的海鲜差好多，另外山东菜是真的能倒酱油。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/qingdao-ce0b22f6-0b52-425c-a5d0-4eefe52706f6.png" alt=""></p><h3 id="交通" tabindex="-1"><a class="header-anchor" href="#交通" aria-hidden="true">#</a> 交通</h3><p>感觉青岛交通还是不错的，地铁线路挺发达，尤其是有条地铁线直接从市里通到山东大学让我觉得很赞。坐车在市里游荡的时候不知道是不是因为避开了拥堵的地区，我感觉堵车不太严重。不过山东人开起车来是真的有点猛。</p><blockquote><p>作者：大白，转载链接：<a href="https://mp.weixin.qq.com/s/8QQvOrkG3Vdjj3GxP1zxBQ" target="_blank" rel="noopener noreferrer">https://mp.weixin.qq.com/s/8QQvOrkG3Vdjj3GxP1zxBQ<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer 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clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">六、求职面试</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">面试题集合</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">背诵版八股文</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">城市选择</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/cityselect/beijing.html" class="nav-link sidebar-link sidebar-page" aria-label="北京"><!---->北京<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/chengdu.html" class="nav-link sidebar-link sidebar-page" aria-label="成都"><!---->成都<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/guangzhou.html" class="nav-link sidebar-link sidebar-page" aria-label="广州"><!---->广州<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/hangzhou.html" class="nav-link sidebar-link sidebar-page" aria-label="杭州"><!---->杭州<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/nanjing.html" class="nav-link sidebar-link sidebar-page" aria-label="南京"><!---->南京<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/cityselect/qingdao.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="青岛"><!---->青岛<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/qingdao.html#工作机会" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="工作机会"><!---->工作机会<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/qingdao.html#海尔" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="海尔"><!---->海尔<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/qingdao.html#海信" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="海信"><!---->海信<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/qingdao.html#光大银行青岛研发中心" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="光大银行青岛研发中心"><!---->光大银行青岛研发中心<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/qingdao.html#青岛银行" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="青岛银行"><!---->青岛银行<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/qingdao.html#青岛凯亚" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="青岛凯亚"><!---->青岛凯亚<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/qingdao.html#青岛鼎信" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="青岛鼎信"><!---->青岛鼎信<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/qingdao.html#yeelight" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="Yeelight"><!---->Yeelight<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/qingdao.html#中车四方" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="中车四方"><!---->中车四方<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/qingdao.html#中电41所" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="中电41所"><!---->中电41所<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/qingdao.html#生活" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="生活"><!---->生活<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/qingdao.html#房价" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="房价"><!---->房价<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/qingdao.html#教育" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="教育"><!---->教育<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/qingdao.html#风景-美食" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="风景&amp;美食"><!---->风景&amp;美食<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/qingdao.html#交通" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="交通"><!---->交通<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li></ul><!--]--></li><li><!--[--><a href="/cityselect/shenzhen.html" class="nav-link sidebar-link sidebar-page" aria-label="深圳"><!---->深圳<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/suzhou.html" class="nav-link sidebar-link sidebar-page" aria-label="苏州"><!---->苏州<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/xian.html" class="nav-link sidebar-link sidebar-page" aria-label="西安"><!---->西安<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/zhengzhou.html" class="nav-link sidebar-link sidebar-page" aria-label="郑州"><!---->郑州<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/jinan.html" class="nav-link sidebar-link sidebar-page" aria-label="济南"><!---->济南<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->青岛都有哪些值得加入的IT互联网公司？</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月27日</span><meta property="datePublished" content="2022-03-27T08:36:50.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category4" role>求职面试</li><meta property="articleSection" content="求职面试"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>城市选择</li></ul><meta property="keywords" content="城市选择"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 7 分钟</span><meta property="timeRequired" content="PT7M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/qingdao.html#工作机会" class="router-link-active router-link-exact-active toc-link level2">工作机会</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/qingdao.html#海尔" class="router-link-active router-link-exact-active toc-link level3">海尔</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/qingdao.html#海信" class="router-link-active router-link-exact-active toc-link level3">海信</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/qingdao.html#光大银行青岛研发中心" class="router-link-active router-link-exact-active toc-link level3">光大银行青岛研发中心</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/qingdao.html#青岛银行" class="router-link-active router-link-exact-active toc-link level3">青岛银行</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/qingdao.html#青岛凯亚" class="router-link-active router-link-exact-active toc-link level3">青岛凯亚</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/qingdao.html#青岛鼎信" class="router-link-active router-link-exact-active toc-link level3">青岛鼎信</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/qingdao.html#yeelight" class="router-link-active router-link-exact-active toc-link level3">Yeelight</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/qingdao.html#中车四方" class="router-link-active router-link-exact-active toc-link level3">中车四方</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/qingdao.html#中电41所" class="router-link-active router-link-exact-active toc-link level3">中电41所</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/qingdao.html#生活" class="router-link-active router-link-exact-active toc-link level2">生活</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/qingdao.html#房价" class="router-link-active router-link-exact-active toc-link level3">房价</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/qingdao.html#教育" class="router-link-active router-link-exact-active toc-link level3">教育</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/qingdao.html#风景-美食" class="router-link-active router-link-exact-active toc-link level3">风景&amp;美食</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/qingdao.html#交通" class="router-link-active router-link-exact-active toc-link level3">交通</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="青岛都有哪些值得加入的it互联网公司" tabindex="-1"><a class="header-anchor" href="#青岛都有哪些值得加入的it互联网公司" aria-hidden="true">#</a> 青岛都有哪些值得加入的IT互联网公司？</h1><p>上次发了郑州都有哪些好的互联网公司后，意外地发现青岛的呼声挺高，再加上我之前去青岛旅游过一次，对青岛的印象特别好，所以今天就来把青岛安排上。</p><p>当时我妹还在沙滩上留了一张“沉默王二在青岛”的印迹。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/qingdao-938dc8a2-9b47-4e12-aa45-79c2caf94f04.png" alt=""></p><p>按照我妹的说法，“青岛真是一座网红城市，美女是真多！”</p><p>如果在海边有几套房，租出去，再有一个编制的好工作，简直在青岛的生活不要太惬意！下面我就把招程序员的公司来捋一遍吧。</p><h2 id="工作机会" tabindex="-1"><a class="header-anchor" href="#工作机会" aria-hidden="true">#</a> 工作机会</h2><p>青岛软件行业的发展太滞后了，没有大规模的软件公司，做软件的公司大部分都是外包公司，而且规模还很小。</p><h3 id="海尔" tabindex="-1"><a class="header-anchor" href="#海尔" aria-hidden="true">#</a> 海尔</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/qingdao-e656449e-a34f-4915-a1cb-459208d23e34.png" alt=""></p><p>海尔在青岛多年了，曾经有段辉煌期的。我舍友带着我在山东哈酒时，一个老大哥在酒桌上就跟我们聊起来，说他当初在海尔买家都是要请他们吃饭才卖给产品的。不过近些年海尔就不太行了，但依然在青岛是个工作上的好选择。海尔 Java 岗位给应届 985 硕士的报价是年薪 14 万。本科生相对少一点，年薪大概在 8万 到 12万 左右。我路过海尔时感觉海尔的园区还修的挺漂亮的。另外说一句，感觉海尔卡奥斯还行，在工业互联网领域做的还可以。</p><h3 id="海信" tabindex="-1"><a class="header-anchor" href="#海信" aria-hidden="true">#</a> 海信</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/qingdao-9645cf8d-d9dc-4de7-a192-bdb9a447ec49.png" alt=""></p><p>我之前总觉得海信和海尔有某种联系，不过我查了下并没有，路过海信的园区时觉得海信也修的挺漂亮的。一个 211 硕士爆料的薪资是每月 10k，然后一年 13 个月工资。福利待遇方面感觉还可以，前两年有免费宿舍，交通补贴每月 200，住房补贴 800 每月，可以领三年。试用期 6 个月，试用期间 90% 薪资，免费班车，公积金 10%，社保全额。工作早9晚6，中午休息一小时。</p><p>另外就是如果还是喜欢互联网氛围的话去海信聚好看比较好，就是海信电视上那个 APP ，听说技术还不错，给的工资也相对较高。不过加班多啊。</p><h3 id="光大银行青岛研发中心" tabindex="-1"><a class="header-anchor" href="#光大银行青岛研发中心" aria-hidden="true">#</a> 光大银行青岛研发中心</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/qingdao-7351e8f8-90d5-4f3c-998a-703b36ec1fca.png" alt=""></p><p>待遇听说还不错，以前是归分行管，现在归总行管。青岛这边主要开发云缴费业务。据说是有末尾淘汰机制。近几年好多员工都跑到青岛银行了。</p><h3 id="青岛银行" tabindex="-1"><a class="header-anchor" href="#青岛银行" aria-hidden="true">#</a> 青岛银行</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/qingdao-cc5091a0-28ad-4439-8718-a6b79e80ef83.png" alt=""></p><p>青岛银行总行的技术岗。薪资不算高，有薪资爆料是年薪12w，不过算是摸鱼的天堂了，活大部分是外包干。</p><h3 id="青岛凯亚" tabindex="-1"><a class="header-anchor" href="#青岛凯亚" aria-hidden="true">#</a> 青岛凯亚</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/qingdao-9fcaebb9-fcf0-4b34-8302-c0be931ae1ce.png" alt=""></p><p>在青岛软件企业能算中上游了，不过全靠同行衬托。加上各种补贴，一年的工资差不多是是十二三万吧。试用期工资打五六折。技术还可以，不过有人爆料说他加班还挺多的。</p><h3 id="青岛鼎信" tabindex="-1"><a class="header-anchor" href="#青岛鼎信" aria-hidden="true">#</a> 青岛鼎信</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/qingdao-f941c172-1ff2-40ce-bea0-8cb52a030bf3.png" alt=""></p><p>主要做通信的公司，一个应届硕士的爆料是税前13k，每年13个月的工资，有食堂，每个月600的饭补。</p><h3 id="yeelight" tabindex="-1"><a class="header-anchor" href="#yeelight" aria-hidden="true">#</a> Yeelight</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/qingdao-7f88980b-d21e-4b27-9306-f911eb8a02e6.png" alt=""></p><p>Yeelight 算是在青岛为数不多的小而美的公司了，目前团队330人，研发人员超过一半，主要做智能照明，有小米的投资。听说团队氛围还不错，比较重视技术。我在网上没找到校招待遇的介绍，社招的话 BOSS 招聘 3-5年 Java 经验的报价是 12k-24k。</p><h3 id="中车四方" tabindex="-1"><a class="header-anchor" href="#中车四方" aria-hidden="true">#</a> 中车四方</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/qingdao-f75fc5b3-2587-42d5-a80f-592a49c515eb.png" alt=""></p><p>中车四方是国有控股公司，薪资待遇在青岛算中上。也招程序员。应届毕业生是6个月试用期，转正以后每年工资税前差不多15w左右。不过他这个工资构成和别人不一样呀。每月税前一万左右的工资好像其中六千左右是绩效，然后每年年中会发一个业绩奖金，不同部门的奖金差别很大。</p><h3 id="中电41所" tabindex="-1"><a class="header-anchor" href="#中电41所" aria-hidden="true">#</a> 中电41所</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/qingdao-53f614bb-d10d-4ae2-9f83-5911ef8ddead.png" alt=""></p><p>说实话，我一直对中电系列的研究所印象不是很好，不过听说中电28所的薪资后对中电系列的印象有所改观（这里是闲扯一句哈，中电28所在南京，和青岛没啥关系）。注意41所得总部是在安徽，青岛只是一个分部，我了解到是加班会比较严重。</p><p>好嘛，好不容易凑出来这几个程序员的工作机会，大家要是还知道一些比较好的工作机会，欢迎来补充呀。</p><h2 id="生活" tabindex="-1"><a class="header-anchor" href="#生活" aria-hidden="true">#</a> 生活</h2><h3 id="房价" tabindex="-1"><a class="header-anchor" href="#房价" aria-hidden="true">#</a> 房价</h3><p>青岛房均价两万多了吧。崂山和市南比较贵，其它地相对好一些。下面这张图有各区的房价，不是太准，不过可以参考下呀。感觉程序员在北京干几年，攒个首付，然后回青岛找个相对稳定的公司上班，买房压力还不是很大（除了买崂山和市南啊）。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/qingdao-a228e29e-363f-44a3-b8cc-6cdd18d34b9f.png" alt=""></p><h3 id="教育" tabindex="-1"><a class="header-anchor" href="#教育" aria-hidden="true">#</a> 教育</h3><p>感觉青岛的教育方面很不错。</p><p>大学方面，山东大学在青岛是有校区的，虽然离市区是真的远，但是人家有地铁呀。我记得坐那趟地铁去山东大学青岛校区找我舍友时穿越崂山，窗外的风景是真的漂亮。中国海洋大学也是一所985，校区是真的漂亮。中国石油大学是一所211，也挺不错的。另外像青岛大学、青岛理工大学、山东科技大学这些院校也是不错的。这几年各个高校也在青岛修建了研究院，感觉还是挺有发展前景的。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/qingdao-b37788d7-c33d-475a-bc69-05927bf0825d.png" alt=""></p><p>高中方面，青岛二中、青岛一中、青岛五十八中、青岛九中、即墨一中等都非常好。不过山东高考的压力是真的大，感觉我大学和读研时身边的山东同学，当年高考都是英雄般的人物。</p><h3 id="风景-美食" tabindex="-1"><a class="header-anchor" href="#风景-美食" aria-hidden="true">#</a> 风景&amp;美食</h3><p>青岛是真的挺美的，感觉在青岛既能感觉到现代化大都市的感觉、又能体验到民国风情还能体验到欧式风情。另外我同学带我在青岛转时，经常走着走着就见到了大海，这让我这个多年身居内陆，没见过海的少年来说还是挺欣喜的。感觉青岛比西安冷很多，今年4月西安已经很热了，花都开了，但是去了青岛以后发现柳树才刚有一点点绿，还挺凉快的。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/qingdao-d619e60b-732b-497f-a4a0-ebbad7ce1ce9.png" alt=""></p><p>青岛的海鲜是挺丰富了，让我这个很少吃海鲜的少年一次吃了个够，还买了些海鲜给家里面寄了点。果然内陆的海鲜吃起来和沿海城市的海鲜差好多，另外山东菜是真的能倒酱油。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/qingdao-ce0b22f6-0b52-425c-a5d0-4eefe52706f6.png" alt=""></p><h3 id="交通" tabindex="-1"><a class="header-anchor" href="#交通" aria-hidden="true">#</a> 交通</h3><p>感觉青岛交通还是不错的，地铁线路挺发达，尤其是有条地铁线直接从市里通到山东大学让我觉得很赞。坐车在市里游荡的时候不知道是不是因为避开了拥堵的地区，我感觉堵车不太严重。不过山东人开起车来是真的有点猛。</p><blockquote><p>作者：大白，转载链接：<a href="https://mp.weixin.qq.com/s/8QQvOrkG3Vdjj3GxP1zxBQ" target="_blank" rel="noopener noreferrer">https://mp.weixin.qq.com/s/8QQvOrkG3Vdjj3GxP1zxBQ<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" 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class="header-anchor" href="#深圳有哪些牛批的互联网公司" aria-hidden="true">#</a> 深圳有哪些牛批的互联网公司？</h1><p>又到了一年一度的求职签约季，一些小伙伴要开始定工作了，人生第一份工作是非常重要的，同样工作的城市也非常重要。</p><p>很多小伙伴希望在南方发展，那，从事IT或者软硬件，深圳算是一个不错的选择， 所以这里也给大家整理出一份详细的深圳互联网IT公司list， 多一份选择多一份机会！</p><p>一线互联网</p><ul><li>腾讯（总部深圳）</li><li>百度（深圳）</li><li>阿里（深圳）</li><li>字节跳动（深圳）</li><li>硬件巨头 (有软件/互联网业务)</li><li>华为（总部深圳）</li><li>中兴（总部深圳）</li><li>海能达（总部深圳）</li><li>oppo（总部深圳）</li><li>vivo（总部深圳）</li><li>深信服（总部深圳）</li><li>大疆（总部深圳，无人机巨头）</li><li>一加手机（总部深圳）</li><li>柔宇科技（国内领先的柔性屏幕制造商，最近正在准备上市）</li></ul><p>二线大厂</p><ul><li>快手（深圳）</li><li>京东（深圳）</li><li>顺丰（总部深圳）</li></ul><p>三线大厂</p><ul><li>富途证券（2020年成功赴美上市，主要经营港股美股）</li><li>微众银行（总部深圳）</li><li>招银科技（总部深圳）</li><li>平安系列（平安科技、平安寿险、平安产险、平安金融、平安好医生等）</li><li>Shopee（东南亚最大的电商平台，最近发展势头非常强劲）</li><li>有赞（深圳）</li><li>迅雷（总部深圳）</li><li>金蝶（总部深圳）</li><li>随手记（总部深圳）</li></ul><p>AI独角兽公司</p><ul><li>商汤科技（人工智能领域的独角兽）</li><li>追一科技（一家企业级智能服务AI公司）</li><li>超多维科技 （计算机视觉、裸眼3D）</li><li>优必选科技 （智能机器人、人脸识别）</li></ul><p>明星创业公司</p><ul><li>丰巢科技（让生活更简单）</li><li>人人都是产品经理（全球领先的产品经理和运营人 学习、交流、分享平台）</li><li>大丰收（综合农业互联网服务平台）</li><li>小鹅通（专注新教育的技术服务商）</li><li>货拉拉（拉货就找货拉拉）</li><li>编程猫（少儿编程教育头部企业）</li><li>HelloTalk（全球最大的语言学习社交社区）</li><li>大宇无限（ 拥有SnapTube, Lark Player 等多款广受海外新兴市场用户欢迎的产品）</li><li>知识星球（深圳大成天下公司出品）</li><li>XMind（隶属深圳市爱思软件技术有限公司，思维导图软件）</li><li>小赢科技（以技术重塑人类的金融体验）</li></ul><p>其他行业（有软件/互联网业务）</p><ul><li>三大电信运营商：中国移动、中国电信、中国联通</li><li>房产企业：恒大、万科</li><li>中信深圳</li><li>广发证券，深交所</li><li>珍爱网（珍爱网是国内知名的婚恋服务网站之一）</li></ul><blockquote><p>作者：代码随想录，转载链接：<a href="https://mp.weixin.qq.com/s/hBU-eEUq8aN5PWwdZFmC4g" target="_blank" rel="noopener noreferrer">https://mp.weixin.qq.com/s/hBU-eEUq8aN5PWwdZFmC4g<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" 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clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">六、求职面试</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">面试题集合</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">背诵版八股文</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">城市选择</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/cityselect/beijing.html" class="nav-link sidebar-link sidebar-page" aria-label="北京"><!---->北京<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/chengdu.html" class="nav-link sidebar-link sidebar-page" aria-label="成都"><!---->成都<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/guangzhou.html" class="nav-link sidebar-link sidebar-page" aria-label="广州"><!---->广州<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/hangzhou.html" class="nav-link sidebar-link sidebar-page" aria-label="杭州"><!---->杭州<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/nanjing.html" class="nav-link sidebar-link sidebar-page" aria-label="南京"><!---->南京<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/qingdao.html" class="nav-link sidebar-link sidebar-page" aria-label="青岛"><!---->青岛<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/cityselect/shenzhen.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="深圳"><!---->深圳<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/suzhou.html" class="nav-link sidebar-link sidebar-page" aria-label="苏州"><!---->苏州<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/xian.html" class="nav-link sidebar-link sidebar-page" aria-label="西安"><!---->西安<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/zhengzhou.html" class="nav-link sidebar-link sidebar-page" aria-label="郑州"><!---->郑州<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/jinan.html" class="nav-link sidebar-link sidebar-page" aria-label="济南"><!---->济南<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->深圳都有哪些值得加入的IT互联网公司？</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月27日</span><meta property="datePublished" content="2022-03-27T08:36:50.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category4" role>求职面试</li><meta property="articleSection" content="求职面试"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>城市选择</li></ul><meta property="keywords" content="城市选择"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 2 分钟</span><meta property="timeRequired" content="PT2M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="深圳都有哪些值得加入的it互联网公司" tabindex="-1"><a class="header-anchor" href="#深圳都有哪些值得加入的it互联网公司" aria-hidden="true">#</a> 深圳都有哪些值得加入的IT互联网公司？</h1><p>又到了一年一度的求职签约季，一些小伙伴要开始定工作了，人生第一份工作是非常重要的，同样工作的城市也非常重要。</p><p>很多小伙伴希望在南方发展，那，从事IT或者软硬件，深圳算是一个不错的选择， 所以这里也给大家整理出一份详细的深圳互联网IT公司list， 多一份选择多一份机会！</p><p>一线互联网</p><ul><li>腾讯（总部深圳）</li><li>百度（深圳）</li><li>阿里（深圳）</li><li>字节跳动（深圳）</li><li>硬件巨头 (有软件/互联网业务)</li><li>华为（总部深圳）</li><li>中兴（总部深圳）</li><li>海能达（总部深圳）</li><li>oppo（总部深圳）</li><li>vivo（总部深圳）</li><li>深信服（总部深圳）</li><li>大疆（总部深圳，无人机巨头）</li><li>一加手机（总部深圳）</li><li>柔宇科技（国内领先的柔性屏幕制造商，最近正在准备上市）</li></ul><p>二线大厂</p><ul><li>快手（深圳）</li><li>京东（深圳）</li><li>顺丰（总部深圳）</li></ul><p>三线大厂</p><ul><li>富途证券（2020年成功赴美上市，主要经营港股美股）</li><li>微众银行（总部深圳）</li><li>招银科技（总部深圳）</li><li>平安系列（平安科技、平安寿险、平安产险、平安金融、平安好医生等）</li><li>Shopee（东南亚最大的电商平台，最近发展势头非常强劲）</li><li>有赞（深圳）</li><li>迅雷（总部深圳）</li><li>金蝶（总部深圳）</li><li>随手记（总部深圳）</li></ul><p>AI独角兽公司</p><ul><li>商汤科技（人工智能领域的独角兽）</li><li>追一科技（一家企业级智能服务AI公司）</li><li>超多维科技 （计算机视觉、裸眼3D）</li><li>优必选科技 （智能机器人、人脸识别）</li></ul><p>明星创业公司</p><ul><li>丰巢科技（让生活更简单）</li><li>人人都是产品经理（全球领先的产品经理和运营人 学习、交流、分享平台）</li><li>大丰收（综合农业互联网服务平台）</li><li>小鹅通（专注新教育的技术服务商）</li><li>货拉拉（拉货就找货拉拉）</li><li>编程猫（少儿编程教育头部企业）</li><li>HelloTalk（全球最大的语言学习社交社区）</li><li>大宇无限（ 拥有SnapTube, Lark Player 等多款广受海外新兴市场用户欢迎的产品）</li><li>知识星球（深圳大成天下公司出品）</li><li>XMind（隶属深圳市爱思软件技术有限公司，思维导图软件）</li><li>小赢科技（以技术重塑人类的金融体验）</li></ul><p>其他行业（有软件/互联网业务）</p><ul><li>三大电信运营商：中国移动、中国电信、中国联通</li><li>房产企业：恒大、万科</li><li>中信深圳</li><li>广发证券，深交所</li><li>珍爱网（珍爱网是国内知名的婚恋服务网站之一）</li></ul><blockquote><p>作者：代码随想录，转载链接：<a href="https://mp.weixin.qq.com/s/hBU-eEUq8aN5PWwdZFmC4g" target="_blank" rel="noopener noreferrer">https://mp.weixin.qq.com/s/hBU-eEUq8aN5PWwdZFmC4g<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new 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aria-label="成都有哪些牛批的互联网公司？"><!---->成都有哪些牛批的互联网公司？<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/guangzhou.html" class="nav-link sidebar-link sidebar-page" aria-label="想去广州了！"><!---->想去广州了！<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/hangzhou.html" class="nav-link sidebar-link sidebar-page" aria-label="杭州有哪些顶级的互联网公司？"><!---->杭州有哪些顶级的互联网公司？<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/nanjing.html" class="nav-link sidebar-link sidebar-page" aria-label="南京有哪些靠谱的互联网公司？"><!---->南京有哪些靠谱的互联网公司？<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/qingdao.html" class="nav-link sidebar-link sidebar-page" aria-label="青岛有牛逼的互联网公司吗？"><!---->青岛有牛逼的互联网公司吗？<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/shenzhen.html" class="nav-link sidebar-link sidebar-page" 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nav-link sidebar-link heading" aria-label="ZOOM"><!---->ZOOM<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/suzhou.html#华为" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="华为"><!---->华为<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/suzhou.html#_360" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="360"><!---->360<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/suzhou.html#momenta" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="Momenta"><!---->Momenta<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/suzhou.html#企查查" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="企查查"><!---->企查查<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/suzhou.html#收钱吧" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="收钱吧"><!---->收钱吧<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/suzhou.html#中国移动苏州研究院" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="中国移动苏州研究院"><!---->中国移动苏州研究院<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/suzhou.html#生活" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="生活"><!---->生活<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/suzhou.html#教育" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="教育"><!---->教育<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/suzhou.html#房价" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="房价"><!---->房价<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/suzhou.html#娱乐-交通-美食" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="娱乐&amp;交通&amp;美食"><!---->娱乐&amp;交通&amp;美食<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li></ul><!--]--></li><li><!--[--><a href="/cityselect/xian.html" class="nav-link sidebar-link sidebar-page" aria-label="西安有哪些不错的互联网公司？"><!---->西安有哪些不错的互联网公司？<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/zhengzhou.html" class="nav-link sidebar-link sidebar-page" aria-label="郑州有哪些不错的互联网公司？"><!---->郑州有哪些不错的互联网公司？<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->想搬去苏州生活了。。</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月27日</span><meta property="datePublished" content="2022-03-27T08:36:50.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category4" role>求职面试</li><meta property="articleSection" content="求职面试"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>城市选择</li></ul><meta property="keywords" content="城市选择"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 11 分钟</span><meta property="timeRequired" content="PT11M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/suzhou.html#工作机会" class="router-link-active router-link-exact-active toc-link level2">工作机会</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/suzhou.html#微软" class="router-link-active router-link-exact-active toc-link level3">微软</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/suzhou.html#zoom" class="router-link-active router-link-exact-active toc-link level3">ZOOM</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/suzhou.html#华为" class="router-link-active router-link-exact-active toc-link level3">华为</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/suzhou.html#_360" class="router-link-active router-link-exact-active toc-link level3">360</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/suzhou.html#momenta" class="router-link-active router-link-exact-active toc-link level3">Momenta</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/suzhou.html#企查查" class="router-link-active router-link-exact-active toc-link level3">企查查</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/suzhou.html#收钱吧" class="router-link-active router-link-exact-active toc-link level3">收钱吧</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/suzhou.html#中国移动苏州研究院" class="router-link-active router-link-exact-active toc-link level3">中国移动苏州研究院</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/suzhou.html#生活" class="router-link-active router-link-exact-active toc-link level2">生活</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/suzhou.html#教育" class="router-link-active router-link-exact-active toc-link level3">教育</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/suzhou.html#房价" class="router-link-active router-link-exact-active toc-link level3">房价</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/suzhou.html#娱乐-交通-美食" class="router-link-active router-link-exact-active toc-link level3">娱乐&amp;交通&amp;美食</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="想搬去苏州生活了。。" tabindex="-1"><a class="header-anchor" href="#想搬去苏州生活了。。" aria-hidden="true">#</a> 想搬去苏州生活了。。</h1><p>大家好，我是二哥呀！</p><p>老读者应该都知道了，二哥第一份工作就是在苏州的一家外企度过的。除了洛阳，就属苏州生活的时间最长了，同事 nice、环境 nice、衣食住行也 nice。</p><p>初出茅庐的自己，曾无数次想象自己在苏州安家的样子，买一套大房子，把父母也接过来一起住，嗯。。</p><p>去年这个时候，也有读者问我是在苏州的哪一家外企，他老家就是在苏州。。</p><p>讲真，我至今依然觉得如果能去苏州工作和生活也是一个不错的选择，正好也应大家的要求，趁着周末，今天和大家一起来聊一聊苏州的互联网环境。</p><p>有句话叫做上有天堂，下有苏杭，不过有一说一，互联网环境方面苏州和杭州感觉还是有点差距。但是个人觉得还是不错的，而且从 18 年左右开始，苏州的互联网环境开始有了明显的改善。生活方面无论是苏州的地理位置，还是人文环境，都是十分适合居住生活的。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/suzhou-e780c8c6-6e3f-4ba0-a91b-5cf572ee2d54.png" alt=""></p><p>老规矩，下面我们还是按照程序员的工作机会和生活环境来介绍苏州。</p><p>因为苏州目前可供程序员选择的好的就业机会还是不像北上广深等地那么多，我就不把苏州的工作机会分互联网、国企、外企等介绍了。我把比较不错的工作机会直接混在一起详细介绍下，然后其它我知道的工作机会就在最后列一下了。</p><h2 id="工作机会" tabindex="-1"><a class="header-anchor" href="#工作机会" aria-hidden="true">#</a> 工作机会</h2><h3 id="微软" tabindex="-1"><a class="header-anchor" href="#微软" aria-hidden="true">#</a> 微软</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/suzhou-e18a11b0-2667-4e27-b93f-a05dad122e76.png" alt=""></p><p>微软可以说是程序员在苏州最好的工作机会了。微软近些年也一直扩大在苏州的投资力度，目前微软苏州研究院的研发团队已经有 2000 人左右了，并且还在近一步扩建。2022 年微软将启动微软苏州三期新大楼的建设，建成后预计微软在苏州的研发团队会达到5000人。所以，目前想拿微软苏州的 offer 的难度，相比于拿北京上海等其它几个工作地 offer 的难度会低一些，大家抓紧呀。</p><p>许多人对微软的印象就是养生，但是我问了一些微软的职工后发现还是要看组，在微软天天干到 9 点多才能下班的组也是有的，不过大部分组养生起来是真养生，支持居家办公这种工作方式是真的爽。</p><p>微软的薪资相对于国内的互联网大厂来说会低一些。苏州微软今年校招开出的 offer 是白菜价年薪 29 万左右（26万 base + 10%的年终奖），Special offer 年薪是 31万左右（28万 base + 10% 年终奖）。额外签字费加搬家费一次性发放 6 万元，4.5 万元的股票分 4 年发放。在校招薪水上也看到一个 2 年经验的老哥爆料自己拿到的苏州微软 61 级 offer 薪资，年薪 35 万左右（32万 base + 10%的年终奖），额外签字费加搬家费一次性发放 5 万元，8万美元的股票分4年发放，还有每年7200元的餐补，健身补贴每年 1800 元。</p><p>我有点按捺不住想给苏州微软投简历了。微软校招面试对于手撕代码的考察是很严格的，如果想要去微软的一定要多刷代码题。如果你走社招进微软的话，不止是要刷好题，还要多准备系统设计的相关知识，这个也是可以针对性准备的，可以看我这篇文章--<a href="https://mp.weixin.qq.com/s/Thd7AsuPq1c0Wgog-Ku0Bg" target="_blank" rel="noopener noreferrer">大型系统设计方案<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，另外如果想准备面试常问八股文，也可以看这里-<a href="https://mp.weixin.qq.com/s/1gXVd_6BEmaocu1NA4YToQ" target="_blank" rel="noopener noreferrer">八股文合集<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><h3 id="zoom" tabindex="-1"><a class="header-anchor" href="#zoom" aria-hidden="true">#</a> ZOOM</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/suzhou-ce9a78ef-6a18-4adf-8a4f-de7b7fa34b45.png" alt=""></p><p>在苏州，Zoom是除微软外的另一个好选择。Zoom 曾经被评为全球最佳雇主。根据 zoom 员工的说法，zoom的技术水平大概和国内二三线厂的水平差不多。薪资方面，比国内互联网也要低一些，看到一个校招薪资的爆料，一个做前端的硕士在苏州zoom的薪资是17k * 14。额外有 7 万美元的股票，分 4 年发完。虽然 base 薪资方面相对低一些，但是 zoom 工作是真的爽呀，没有 996，没有 kpi，办公环境好，无限零食和水果供应，这还要啥自行车。</p><h3 id="华为" tabindex="-1"><a class="header-anchor" href="#华为" aria-hidden="true">#</a> 华为</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/suzhou-8bd7e5d1-1984-43f7-84e1-b02141160a37.png" alt=""></p><p>华为在苏州的研究院设立时间不长。华为的苏研院的加班在各地所有的研发中心中是排的上号的。华为各地研发中心的忙碌程度差不多是成都 》= 西安 》= 苏州 &gt; 武汉 &gt; 东莞 &gt; 杭州 &gt; 南京 &gt; 深圳 &gt; 北京 &gt; 上海（整体感觉是这样，每个研发中心各部门的加班情况也不同）。不过华为有一个好处就是你挣的钱能和你的付出成正比，所以想快速挣钱的还是建议去。</p><h3 id="_360" tabindex="-1"><a class="header-anchor" href="#_360" aria-hidden="true">#</a> 360</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/suzhou-85547b36-15da-443f-b7f2-878bfd06e997.png" alt=""></p><p>360 来苏州时间不长，2018年才逐渐开始在苏州设立开发部门。目前 360 苏州包含了未来安全研究、360政企、安全等部门。目前 360苏州的薪资水平是北京上海薪资水平的 8 折，看到 21 年毕业的一个应届硕士爆料月薪是 16k，工资有点少，不过感觉在苏州也不错呀。</p><h3 id="momenta" tabindex="-1"><a class="header-anchor" href="#momenta" aria-hidden="true">#</a> Momenta</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/suzhou-c4c83915-04b5-4660-9bad-32989a65116d.png" alt=""></p><p>一开始我对 Momenta 还真没什么了解，直到我有一天突然在校招薪水上搜了下 Momenta，然后我不由得直呼卧槽，这特么是给应届生的薪资？认真的？</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/suzhou-ff400245-2fe0-437e-8dd3-aa9eed650e99.png" alt=""></p><p>然后我详细的了解了下这家公司，这是一家做自动驾驶的公司，创立时间也不长，2016年创立的。不过据说这家公司加班特别猛，有的组 10 10 5，有的组 996，有的组比 996 还要累。Momenta 现在能给的起这么高的工资，实力还是有的，不过对于发展的前景来说，领域这么垂直的公司风险性是比较大的。</p><h3 id="企查查" tabindex="-1"><a class="header-anchor" href="#企查查" aria-hidden="true">#</a> 企查查</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/suzhou-d4bcbf1d-f758-4267-b55f-7553d7673511.png" alt=""></p><p>跟上面的公司相比，企查查算是一个小而美的公司。企查查是苏州的本地企业，目前来说口碑还是很不错的。目前企查查的业务很赚钱，自己的大楼也差不多修好了。没有强制加班，全额社保和公积金。我没有查到企查查的校招薪资，看 boss 上的社招薪资水平不算太高，只能算还可以了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/suzhou-c7dbed8d-c471-4969-bfc4-badf8e0ac346.png" alt=""></p><h3 id="收钱吧" tabindex="-1"><a class="header-anchor" href="#收钱吧" aria-hidden="true">#</a> 收钱吧</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/suzhou-31051fbc-a573-4328-904b-6915bfba2323.png" alt=""></p><p>这个公司大家应该都听说过，每次你用支付宝或者微信给商家付钱时都能听到“收钱吧到账xx元”。收钱吧的技术不错，加班也比较少，收钱吧的风评不错。不过就是工资相对给的少点，月薪 17k 左右（在苏州也还行了），每年14 个月的月薪。</p><h3 id="中国移动苏州研究院" tabindex="-1"><a class="header-anchor" href="#中国移动苏州研究院" aria-hidden="true">#</a> 中国移动苏州研究院</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/suzhou-1bb72f74-dba6-420f-8c37-0a9e621b3561.png" alt=""></p><p>中国移动苏州研究院又叫苏小研，其实犹豫了很久要不要把他放在推荐里。苏小妍在知乎上的争议很大，有说待遇福利很好的，也有狂喷的。苏小研肯定有国企的通病，这个我确认，但具体怎么样就靠大家自己判断了，贴两张知乎上对苏小研的评价，好坏要大家自己去具体确认了。这两张图评价完全是两个极端呀。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/suzhou-b616269f-3717-4ea4-8c29-b4d5bcd448b4.png" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/suzhou-76122245-a8e1-44a8-a1f4-8ce7ab3c640d.png" alt=""></p><p>上面是我认为苏州的比较不错的程序员就业机会，其它的一些苏州比较成规模的提供程序员就业机会的公司就列在下面，并且快速的简单介绍一下。</p><p><strong>同程艺龙</strong>：之前算是苏州最大的互联网公司，但是目前员工对公司的吐槽比较多，详情可以在知乎和脉脉上搜下。</p><p><strong>京东工品汇</strong>：工品汇是之前苏州的企业，被京东收购了，据说目前算是京东比较边缘的业务部门。</p><p><strong>科大讯飞</strong>：科大讯飞在苏州是有岗位的，不过岗位很少。</p><p><strong>思必驰</strong>：和科大讯飞一样做语音的，不过现在网上对思必驰的负面评价孩挺多</p><p><strong>建信金科、中银金科</strong>：看名字就可以看出，这两公司属于银行的子公司，也可以说是外包。大家要把这些公司和银行的软件开发中心区分开来。其实银行的子公司给人的感觉有点尴尬，就是它们既没有互联网公司的高薪，也没有银行软件开发中心直属总行的稳定。当然这也就是相对于大互联网公司来说，如果手上没有一二线互联网公司的 offer，也可以考虑去的。</p><p><strong>锐捷</strong>：许多同学应该听说过锐捷，专门做校园网的，比较偏底层，对 Linux 内核感兴趣的可以看看呀。薪资相对较低，校招开出的薪资在13~15k 这个区间。</p><p><strong>金蝶</strong>：国内 ERP 巨头，在苏州貌似岗位不多。</p><p><strong>科沃斯</strong>：主要做智能硬件的，公司很强，市值都一千多亿了。也有很多编程的岗位。。</p><h2 id="生活" tabindex="-1"><a class="header-anchor" href="#生活" aria-hidden="true">#</a> 生活</h2><p>许多人想在苏州定居，也主要是觉得在苏州生活很惬意。下面还是分教育、房价、交通、娱乐等方面介绍下。</p><h3 id="教育" tabindex="-1"><a class="header-anchor" href="#教育" aria-hidden="true">#</a> 教育</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/suzhou-1b300d4a-1384-4dd2-a9a5-98221f1f6c46.png" alt=""></p><p>高等教育方面。其实就苏州本身而言，高校并不多，只有苏州大学一所 211（苏大的自然语言处理挺强的）。但是前些年许多地理位置偏北的高校为了打造自己在南方的影响力，提高生源质量，都会选择在南方办学。其中一部分选择了深圳，另一部分选择了苏州。西交大、中科大、中国人民大学、东南大学、西工大等院校都在苏州设有校区。所以虽然苏州本地院校不多，但是苏州计算机软件相关的高校毕业生并不少。不过这种现象随着西工大太仓校区刚修好，异地办学就被叫停了，我瓜实惨~</p><p>中小学教育方面，苏州的教育质量肯定是不错的，不过江苏的高考压力可不小。有些人定居苏州也会担心下一代的高考问题。</p><h3 id="房价" tabindex="-1"><a class="header-anchor" href="#房价" aria-hidden="true">#</a> 房价</h3><p>相比于苏州的工资水平，其实苏州的房价也不低了，看网站上的新房均价大约两万五一平。但是和旁边的城市一比，那苏州的房价就比较香了。在苏州咬咬牙还是能考虑买房的。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/suzhou-60675498-4bfe-46d2-af70-da2f21add403.png" alt=""></p><h3 id="娱乐-交通-美食" tabindex="-1"><a class="header-anchor" href="#娱乐-交通-美食" aria-hidden="true">#</a> 娱乐&amp;交通&amp;美食</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/suzhou-c35c16ca-0bbf-489a-ba0b-9ecb6fef6905.png" alt=""></p><p>娱乐方面苏州好玩的地方很多，传统的苏州园林风格和苏州现代风格都让人十分留恋。周末在苏州园林逛一逛真的很惬意。</p><p>交通方面堵车是肯定会堵的，还没见过哪个二线以上城市不堵车的。但是苏州的交通相比于其它同量级的城市还是要好很多。另外苏州地理位置上靠近上海南京，出去玩也很方便。</p><p>美食方面，苏帮菜貌似在全国并不多见，口味偏甜。这就不知道大多数北方人能不能吃得惯了~</p><p>好了，就介绍这么多，我感觉我还真有点想给苏州微软投简历去工作生活一段时间~</p><blockquote><p>作者：大白，转载链接：<a href="https://mp.weixin.qq.com/s/cnYsZLudFOwv5EKYMsMh0Q" target="_blank" rel="noopener noreferrer">https://mp.weixin.qq.com/s/cnYsZLudFOwv5EKYMsMh0Q<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><img 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sidebar-link heading" aria-label="中国移动苏州研究院"><!---->中国移动苏州研究院<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/suzhou.html#生活" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="生活"><!---->生活<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/suzhou.html#教育" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="教育"><!---->教育<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/suzhou.html#房价" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="房价"><!---->房价<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/suzhou.html#娱乐-交通-美食" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="娱乐&amp;交通&amp;美食"><!---->娱乐&amp;交通&amp;美食<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li></ul><!--]--></li><li><!--[--><a href="/cityselect/xian.html" class="nav-link sidebar-link sidebar-page" aria-label="西安"><!---->西安<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/zhengzhou.html" class="nav-link sidebar-link sidebar-page" aria-label="郑州"><!---->郑州<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/jinan.html" class="nav-link sidebar-link sidebar-page" aria-label="济南"><!---->济南<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->苏州都有哪些值得加入的IT互联网公司？</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月27日</span><meta property="datePublished" content="2022-03-27T08:36:50.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category4" role>求职面试</li><meta property="articleSection" content="求职面试"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>城市选择</li></ul><meta property="keywords" content="城市选择"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 11 分钟</span><meta property="timeRequired" content="PT11M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/suzhou.html#工作机会" class="router-link-active router-link-exact-active toc-link level2">工作机会</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/suzhou.html#微软" class="router-link-active router-link-exact-active toc-link level3">微软</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/suzhou.html#zoom" class="router-link-active router-link-exact-active toc-link level3">ZOOM</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/suzhou.html#华为" class="router-link-active router-link-exact-active toc-link level3">华为</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/suzhou.html#_360" class="router-link-active router-link-exact-active toc-link level3">360</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/suzhou.html#momenta" class="router-link-active router-link-exact-active toc-link level3">Momenta</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/suzhou.html#企查查" class="router-link-active router-link-exact-active toc-link level3">企查查</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/suzhou.html#收钱吧" class="router-link-active router-link-exact-active toc-link level3">收钱吧</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/suzhou.html#中国移动苏州研究院" class="router-link-active router-link-exact-active toc-link level3">中国移动苏州研究院</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/suzhou.html#生活" class="router-link-active router-link-exact-active toc-link level2">生活</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/suzhou.html#教育" class="router-link-active router-link-exact-active toc-link level3">教育</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/suzhou.html#房价" class="router-link-active router-link-exact-active toc-link level3">房价</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/suzhou.html#娱乐-交通-美食" class="router-link-active router-link-exact-active toc-link level3">娱乐&amp;交通&amp;美食</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="苏州都有哪些值得加入的it互联网公司" tabindex="-1"><a class="header-anchor" href="#苏州都有哪些值得加入的it互联网公司" aria-hidden="true">#</a> 苏州都有哪些值得加入的IT互联网公司？</h1><p>大家好，我是二哥呀！</p><p>老读者应该都知道了，二哥第一份工作就是在苏州的一家外企度过的。除了洛阳，就属苏州生活的时间最长了，同事 nice、环境 nice、衣食住行也 nice。</p><p>初出茅庐的自己，曾无数次想象自己在苏州安家的样子，买一套大房子，把父母也接过来一起住，嗯。。</p><p>去年这个时候，也有读者问我是在苏州的哪一家外企，他老家就是在苏州。。</p><p>讲真，我至今依然觉得如果能去苏州工作和生活也是一个不错的选择，正好也应大家的要求，趁着周末，今天和大家一起来聊一聊苏州的互联网环境。</p><p>有句话叫做上有天堂，下有苏杭，不过有一说一，互联网环境方面苏州和杭州感觉还是有点差距。但是个人觉得还是不错的，而且从 18 年左右开始，苏州的互联网环境开始有了明显的改善。生活方面无论是苏州的地理位置，还是人文环境，都是十分适合居住生活的。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/suzhou-e780c8c6-6e3f-4ba0-a91b-5cf572ee2d54.png" alt=""></p><p>老规矩，下面我们还是按照程序员的工作机会和生活环境来介绍苏州。</p><p>因为苏州目前可供程序员选择的好的就业机会还是不像北上广深等地那么多，我就不把苏州的工作机会分互联网、国企、外企等介绍了。我把比较不错的工作机会直接混在一起详细介绍下，然后其它我知道的工作机会就在最后列一下了。</p><h2 id="工作机会" tabindex="-1"><a class="header-anchor" href="#工作机会" aria-hidden="true">#</a> 工作机会</h2><h3 id="微软" tabindex="-1"><a class="header-anchor" href="#微软" aria-hidden="true">#</a> 微软</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/suzhou-e18a11b0-2667-4e27-b93f-a05dad122e76.png" alt=""></p><p>微软可以说是程序员在苏州最好的工作机会了。微软近些年也一直扩大在苏州的投资力度，目前微软苏州研究院的研发团队已经有 2000 人左右了，并且还在近一步扩建。2022 年微软将启动微软苏州三期新大楼的建设，建成后预计微软在苏州的研发团队会达到5000人。所以，目前想拿微软苏州的 offer 的难度，相比于拿北京上海等其它几个工作地 offer 的难度会低一些，大家抓紧呀。</p><p>许多人对微软的印象就是养生，但是我问了一些微软的职工后发现还是要看组，在微软天天干到 9 点多才能下班的组也是有的，不过大部分组养生起来是真养生，支持居家办公这种工作方式是真的爽。</p><p>微软的薪资相对于国内的互联网大厂来说会低一些。苏州微软今年校招开出的 offer 是白菜价年薪 29 万左右（26万 base + 10%的年终奖），Special offer 年薪是 31万左右（28万 base + 10% 年终奖）。额外签字费加搬家费一次性发放 6 万元，4.5 万元的股票分 4 年发放。在校招薪水上也看到一个 2 年经验的老哥爆料自己拿到的苏州微软 61 级 offer 薪资，年薪 35 万左右（32万 base + 10%的年终奖），额外签字费加搬家费一次性发放 5 万元，8万美元的股票分4年发放，还有每年7200元的餐补，健身补贴每年 1800 元。</p><p>我有点按捺不住想给苏州微软投简历了。微软校招面试对于手撕代码的考察是很严格的，如果想要去微软的一定要多刷代码题。如果你走社招进微软的话，不止是要刷好题，还要多准备系统设计的相关知识，这个也是可以针对性准备的，可以看我这篇文章--<a href="https://mp.weixin.qq.com/s/Thd7AsuPq1c0Wgog-Ku0Bg" target="_blank" rel="noopener noreferrer">大型系统设计方案<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，另外如果想准备面试常问八股文，也可以看这里-<a href="https://mp.weixin.qq.com/s/1gXVd_6BEmaocu1NA4YToQ" target="_blank" rel="noopener noreferrer">八股文合集<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><h3 id="zoom" tabindex="-1"><a class="header-anchor" href="#zoom" aria-hidden="true">#</a> ZOOM</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/suzhou-ce9a78ef-6a18-4adf-8a4f-de7b7fa34b45.png" alt=""></p><p>在苏州，Zoom是除微软外的另一个好选择。Zoom 曾经被评为全球最佳雇主。根据 zoom 员工的说法，zoom的技术水平大概和国内二三线厂的水平差不多。薪资方面，比国内互联网也要低一些，看到一个校招薪资的爆料，一个做前端的硕士在苏州zoom的薪资是17k * 14。额外有 7 万美元的股票，分 4 年发完。虽然 base 薪资方面相对低一些，但是 zoom 工作是真的爽呀，没有 996，没有 kpi，办公环境好，无限零食和水果供应，这还要啥自行车。</p><h3 id="华为" tabindex="-1"><a class="header-anchor" href="#华为" aria-hidden="true">#</a> 华为</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/suzhou-8bd7e5d1-1984-43f7-84e1-b02141160a37.png" alt=""></p><p>华为在苏州的研究院设立时间不长。华为的苏研院的加班在各地所有的研发中心中是排的上号的。华为各地研发中心的忙碌程度差不多是成都 》= 西安 》= 苏州 &gt; 武汉 &gt; 东莞 &gt; 杭州 &gt; 南京 &gt; 深圳 &gt; 北京 &gt; 上海（整体感觉是这样，每个研发中心各部门的加班情况也不同）。不过华为有一个好处就是你挣的钱能和你的付出成正比，所以想快速挣钱的还是建议去。</p><h3 id="_360" tabindex="-1"><a class="header-anchor" href="#_360" aria-hidden="true">#</a> 360</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/suzhou-85547b36-15da-443f-b7f2-878bfd06e997.png" alt=""></p><p>360 来苏州时间不长，2018年才逐渐开始在苏州设立开发部门。目前 360 苏州包含了未来安全研究、360政企、安全等部门。目前 360苏州的薪资水平是北京上海薪资水平的 8 折，看到 21 年毕业的一个应届硕士爆料月薪是 16k，工资有点少，不过感觉在苏州也不错呀。</p><h3 id="momenta" tabindex="-1"><a class="header-anchor" href="#momenta" aria-hidden="true">#</a> Momenta</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/suzhou-c4c83915-04b5-4660-9bad-32989a65116d.png" alt=""></p><p>一开始我对 Momenta 还真没什么了解，直到我有一天突然在校招薪水上搜了下 Momenta，然后我不由得直呼卧槽，这特么是给应届生的薪资？认真的？</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/suzhou-ff400245-2fe0-437e-8dd3-aa9eed650e99.png" alt=""></p><p>然后我详细的了解了下这家公司，这是一家做自动驾驶的公司，创立时间也不长，2016年创立的。不过据说这家公司加班特别猛，有的组 10 10 5，有的组 996，有的组比 996 还要累。Momenta 现在能给的起这么高的工资，实力还是有的，不过对于发展的前景来说，领域这么垂直的公司风险性是比较大的。</p><h3 id="企查查" tabindex="-1"><a class="header-anchor" href="#企查查" aria-hidden="true">#</a> 企查查</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/suzhou-d4bcbf1d-f758-4267-b55f-7553d7673511.png" alt=""></p><p>跟上面的公司相比，企查查算是一个小而美的公司。企查查是苏州的本地企业，目前来说口碑还是很不错的。目前企查查的业务很赚钱，自己的大楼也差不多修好了。没有强制加班，全额社保和公积金。我没有查到企查查的校招薪资，看 boss 上的社招薪资水平不算太高，只能算还可以了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/suzhou-c7dbed8d-c471-4969-bfc4-badf8e0ac346.png" alt=""></p><h3 id="收钱吧" tabindex="-1"><a class="header-anchor" href="#收钱吧" aria-hidden="true">#</a> 收钱吧</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/suzhou-31051fbc-a573-4328-904b-6915bfba2323.png" alt=""></p><p>这个公司大家应该都听说过，每次你用支付宝或者微信给商家付钱时都能听到“收钱吧到账xx元”。收钱吧的技术不错，加班也比较少，收钱吧的风评不错。不过就是工资相对给的少点，月薪 17k 左右（在苏州也还行了），每年14 个月的月薪。</p><h3 id="中国移动苏州研究院" tabindex="-1"><a class="header-anchor" href="#中国移动苏州研究院" aria-hidden="true">#</a> 中国移动苏州研究院</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/suzhou-1bb72f74-dba6-420f-8c37-0a9e621b3561.png" alt=""></p><p>中国移动苏州研究院又叫苏小研，其实犹豫了很久要不要把他放在推荐里。苏小妍在知乎上的争议很大，有说待遇福利很好的，也有狂喷的。苏小研肯定有国企的通病，这个我确认，但具体怎么样就靠大家自己判断了，贴两张知乎上对苏小研的评价，好坏要大家自己去具体确认了。这两张图评价完全是两个极端呀。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/suzhou-b616269f-3717-4ea4-8c29-b4d5bcd448b4.png" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/suzhou-76122245-a8e1-44a8-a1f4-8ce7ab3c640d.png" alt=""></p><p>上面是我认为苏州的比较不错的程序员就业机会，其它的一些苏州比较成规模的提供程序员就业机会的公司就列在下面，并且快速的简单介绍一下。</p><p><strong>同程艺龙</strong>：之前算是苏州最大的互联网公司，但是目前员工对公司的吐槽比较多，详情可以在知乎和脉脉上搜下。</p><p><strong>京东工品汇</strong>：工品汇是之前苏州的企业，被京东收购了，据说目前算是京东比较边缘的业务部门。</p><p><strong>科大讯飞</strong>：科大讯飞在苏州是有岗位的，不过岗位很少。</p><p><strong>思必驰</strong>：和科大讯飞一样做语音的，不过现在网上对思必驰的负面评价孩挺多</p><p><strong>建信金科、中银金科</strong>：看名字就可以看出，这两公司属于银行的子公司，也可以说是外包。大家要把这些公司和银行的软件开发中心区分开来。其实银行的子公司给人的感觉有点尴尬，就是它们既没有互联网公司的高薪，也没有银行软件开发中心直属总行的稳定。当然这也就是相对于大互联网公司来说，如果手上没有一二线互联网公司的 offer，也可以考虑去的。</p><p><strong>锐捷</strong>：许多同学应该听说过锐捷，专门做校园网的，比较偏底层，对 Linux 内核感兴趣的可以看看呀。薪资相对较低，校招开出的薪资在13~15k 这个区间。</p><p><strong>金蝶</strong>：国内 ERP 巨头，在苏州貌似岗位不多。</p><p><strong>科沃斯</strong>：主要做智能硬件的，公司很强，市值都一千多亿了。也有很多编程的岗位。。</p><h2 id="生活" tabindex="-1"><a class="header-anchor" href="#生活" aria-hidden="true">#</a> 生活</h2><p>许多人想在苏州定居，也主要是觉得在苏州生活很惬意。下面还是分教育、房价、交通、娱乐等方面介绍下。</p><h3 id="教育" tabindex="-1"><a class="header-anchor" href="#教育" aria-hidden="true">#</a> 教育</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/suzhou-1b300d4a-1384-4dd2-a9a5-98221f1f6c46.png" alt=""></p><p>高等教育方面。其实就苏州本身而言，高校并不多，只有苏州大学一所 211（苏大的自然语言处理挺强的）。但是前些年许多地理位置偏北的高校为了打造自己在南方的影响力，提高生源质量，都会选择在南方办学。其中一部分选择了深圳，另一部分选择了苏州。西交大、中科大、中国人民大学、东南大学、西工大等院校都在苏州设有校区。所以虽然苏州本地院校不多，但是苏州计算机软件相关的高校毕业生并不少。不过这种现象随着西工大太仓校区刚修好，异地办学就被叫停了，我瓜实惨~</p><p>中小学教育方面，苏州的教育质量肯定是不错的，不过江苏的高考压力可不小。有些人定居苏州也会担心下一代的高考问题。</p><h3 id="房价" tabindex="-1"><a class="header-anchor" href="#房价" aria-hidden="true">#</a> 房价</h3><p>相比于苏州的工资水平，其实苏州的房价也不低了，看网站上的新房均价大约两万五一平。但是和旁边的城市一比，那苏州的房价就比较香了。在苏州咬咬牙还是能考虑买房的。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/suzhou-60675498-4bfe-46d2-af70-da2f21add403.png" alt=""></p><h3 id="娱乐-交通-美食" tabindex="-1"><a class="header-anchor" href="#娱乐-交通-美食" aria-hidden="true">#</a> 娱乐&amp;交通&amp;美食</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/suzhou-c35c16ca-0bbf-489a-ba0b-9ecb6fef6905.png" alt=""></p><p>娱乐方面苏州好玩的地方很多，传统的苏州园林风格和苏州现代风格都让人十分留恋。周末在苏州园林逛一逛真的很惬意。</p><p>交通方面堵车是肯定会堵的，还没见过哪个二线以上城市不堵车的。但是苏州的交通相比于其它同量级的城市还是要好很多。另外苏州地理位置上靠近上海南京，出去玩也很方便。</p><p>美食方面，苏帮菜貌似在全国并不多见，口味偏甜。这就不知道大多数北方人能不能吃得惯了~</p><p>好了，就介绍这么多，我感觉我还真有点想给苏州微软投简历去工作生活一段时间~</p><blockquote><p>作者：大白，转载链接：<a href="https://mp.weixin.qq.com/s/cnYsZLudFOwv5EKYMsMh0Q" target="_blank" rel="noopener noreferrer">https://mp.weixin.qq.com/s/cnYsZLudFOwv5EKYMsMh0Q<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><img 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aria-label="教育资源"><!---->教育资源<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/xian.html#医疗资源" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="医疗资源"><!---->医疗资源<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/xian.html#交通" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="交通"><!---->交通<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/xian.html#气候" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="气候"><!---->气候<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/xian.html#做个总结" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="做个总结"><!---->做个总结<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/cityselect/zhengzhou.html" class="nav-link sidebar-link sidebar-page" aria-label="郑州有哪些不错的互联网公司？"><!---->郑州有哪些不错的互联网公司？<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->西安有哪些不错的互联网公司？</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月27日</span><meta property="datePublished" content="2022-03-27T08:36:50.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category4" role>求职面试</li><meta property="articleSection" content="求职面试"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>城市选择</li></ul><meta property="keywords" content="城市选择"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 21 分钟</span><meta property="timeRequired" content="PT21M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/xian.html#工作机会" class="router-link-active router-link-exact-active toc-link level2">工作机会</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/xian.html#互联网" class="router-link-active 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年我刚到西安上研究生的时候，我们专业的学长学姐想留在西安，可选择的也只有华为、中兴以及几个研究所。但也正好是我读研的这几年，不断的有大企业在西安设点，并且将研发部门搬到西安。目前西安的互联网环境已经初具规模，对于计算机相关专业的学生，毕业留在西安也是一个不错的选择。同时这些年西安的互联网环境也在持续向好，不断有大公司在西安设立研发中心。</p><p>同时，西安的互联网环境还处在一个开拓期，几乎所有的大企业都在西安设立研发中心不久，所以除了有限的几个公司和部门比较轻松外，其它加班都比较严重，并且有限的几个公司和部门的情况也在变化中。</p><p>下面就分私企、国企、银行软件开发中心、研究所几大类来介绍西安招计算机相关专业的公司。各个公司的信息是根据我的了解以及和留在西安各个公司的同学打听所收集的，并且收集了部分网上信息。由于社招薪资水平根据每个人的情况相差较大，所以在介绍的时候比较多的提到的是校招的薪资，大家可以参考西安和其它城市的校招薪资来评估西安社招的薪资水平。</p><h3 id="互联网" tabindex="-1"><a class="header-anchor" href="#互联网" aria-hidden="true">#</a> 互联网</h3><p><strong>华为</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-4e82d879-bbe0-4bc5-a088-fadc84483d65.png" alt=""></p><p>如果想在西安快速挣钱的话，华为几乎是最好的选择了，按照华为的工资水平在西安买房根本没有压力。华为在西安的建制很齐全，消费者、CloudBu、云核心等事业群以及<code>华为海思</code>，2012 实验室都有。但是因为去年美国对华为的打压，消费者、华为海思以及 2012 实验室这些之前很香的事业群目前日子都不太好过。</p><p>西安华为校招根据面试评分给应届生进行评级，本科生和硕士生的评级在 13 级 和 15 级 之间，每一级又分为 A、B、C 三个档。根据评级进行工资的评定，13 级 和 14 级 的税前工资在每月 13-19k 之间，每年 14 薪。15 级 需要特别优秀的硕士才能拿到，工资年包基本在税前 30 万 - 40 万之间。华为在西安的校招薪资水平还是很高的，几乎和北京持平了。</p><p>华为在西安的社招我不是特别清楚，只是知道华为社招大部分给的是 OD ，社招想拿正式 offer 基本都需要 16 级以上的评级。</p><p>在华为上班是压力比较大，也比较累的。据我了解，西安华为的 CloudBu 这个事业群下的部门还相对轻松。这个事业部下的部门基本上半年轻松半年忙。在项目不忙的时候，一般工作的节奏是早上 9 点，周二和周四常态化加班到晚 9 点，周一三五 6 点 以后就可以走。每个月的最后一个周，周六要常态化加班。华为产品线的部门是相当忙的，加班到几点就说不好了。不过华为的加班费是给的相当到位的，不会让你白加班的。另外外界对华为员工的技术认可度是比较高的，从华为跳出来去西安的任何一家技术公司都没太大压力。</p><p>读者补充：华为现在除非是应届生，否则基本是OD（Outsourcing Dispacth，也是一种外包，和FESCO签合同，但直系领导都是华为的人，而不是在乙方公司的团队里给甲方华为干活），不能拿股票。如果你想赚钱，可以放弃一切顶住压力，去华为还不错，但也要注意部门，无线网，核心网，还有现在的车联网还不错，但是不建议考虑现在的终端了。</p><p><strong>阿里巴巴</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-135b1f20-48ad-4295-bc50-40969ef023b0.png" alt=""></p><p>阿里巴巴还没大范围的在西安招人，情况目前还不太清楚。我问过阿里巴巴的员工，只知道目前在西安设点的部门是阿里云，需要半年在杭州上班，半年在西安上班，工资水平和杭州一致。不过目前招的量比较小，基本都是招高p，主要是做售前的业务架构设计，只有很少的校招名额。</p><p><strong>京东</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-c9b0621d-f56c-42a0-a618-f261466f06a4.png" alt=""></p><p>京东把京东物流的团队设在了西安航天城，目测团队规模在几百人，工资水平大约是京东在北京工资的 80%。大家可以参考一下，京东去年在北京的部门，校招普通 offer 是年包 28 万，sp 是年包 32.9 万。</p><p>一位在西安京东的读者补充：上班早9点晚7点，周六没有培训不用来。</p><p><strong>腾讯云</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-67aa194e-52b0-4acb-b22b-1c1f4c09fac8.png" alt=""></p><p>腾讯云是腾讯的全资子公司，目前对这里褒贬不一。校招薪资水平本科和硕士生大概是月薪 13-16k，每年 16 薪，大家可以参考一下，腾讯 21 届校招的薪资是 17-21.5k ，每年 18 薪。社招我看一个本科毕业四年经验的老哥拿到的年包是 33 万。腾讯云的职级和腾讯不是对齐的，并且业务比较边缘，这也是网上被喷的一个主要原因。目前西安腾讯云创立时间不久，加班强度是比较大的。</p><p><strong>字节跳动、小米、ViVO、OPPO</strong></p><p>小米已经确定在西安设立研发中心了，但具体是哪些部门还不太清楚。字节跳动之前在西安的部门是审核相关的岗位，目前也有较为确定的消息会在西安设立研发中心，大家感兴趣的话持续关注。今年vivo在线高新环普也设立研发部门了，听说待遇不错。OPPO在西安也是刚设立研发部门不久，招人比较疯狂，听说加班也很疯狂。</p><p><strong>广联达</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-9180be40-265e-42e5-9a85-4d61193b8798.png" alt=""></p><p>广联达西安的部门在针对 21 届毕业生的校招中开出的薪资是很有诚意的。给应届硕士的 sp 是 19k x 15，普通 offer 是 17k x 15，本科生每月基本都在 13-17k 之间。广联达工作制度基本是 965 或者 975，每个月还有一天的带薪病假。这还要啥自行车？不过广联达曾经也有过黑料，大家自行上网了解。</p><p><strong>浙江大华、海康威视</strong></p><p>海康威视其实是国企，但是海康威视和大华工作强度和待遇方面特别一致，就放一块说了。大华和海康威视在西安都有设立研发基地的，并且招人很多。这哥俩目前在网上被喷的比较狠，据说工作强度很大，但工资水平又很低，并且涨薪缓慢。大家如果想去进一步了解可以去找这两个厂子的员工哈。</p><p><strong>360</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-327db5f0-4061-48c3-b672-b1670f98325f.png" alt=""></p><p>360 在西安只有一个几十人的团队。没听说过这里有校招，社招的话 3 年以上经验的差不多能每月给到 20k 。有说在这里待的舒服的，也有喷的。</p><p><strong>奇安信</strong></p><p>奇安信在校招的工资和中兴差不多，年薪 20 万 左右，工作制度是 1085。在西安招的人还是挺多的。</p><p><strong>科大讯飞</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-3592f841-8390-4399-ae8a-94c4368541ea.png" alt=""></p><p>科大讯飞西安丝路总部主要是算法岗，不过我看网上喷的比较多。据说是活多钱少。</p><p><strong>大疆</strong></p><p>在西安的岗位只有相机嵌入式和测试岗位，工资比华为还要略高。</p><p><strong>OPPO</strong></p><p>21 年年初刚在西安成立，最近疯狂招人。加班严重。</p><p><strong>绿盟</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-b70c6624-f4f1-453f-9ec8-5db22661bb18.png" alt=""></p><p>绿盟算是中型企业里比较香的，绿盟在安全领域还是比较强的。工资比较低，硕士校招才能给到 14k x 14，但是这家公司几乎不加班，员工的离职率也一直很低，我同学有违约中兴三方去绿盟的。</p><p>读者补充：最近在绿盟科技实习测试，深切体会到养老型公司。不加班。</p><p><strong>当当网</strong></p><p>早 9 晚 8 点半，周末双休。组内氛围还不错</p><p><strong>交叉信息核心技术研究院</strong></p><p>主要做人工智能。背景很强大。大佬姚期智带队，有 30 位清华交叉信息研究院的教授参与运营。招人的要求很高。</p><p><strong>寒武纪</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-fdf08fc3-d216-4382-913d-5f8b78b8e7df.png" alt=""></p><p>寒武纪是做智能芯片的公司，背后站着中科院计算所。2019 年落户的西咸新区，相关信息比较少。我知道的是加班比较多，不过薪资也高。</p><p><strong>其他</strong></p><p>其它的中型私企我就不一个个点评了，我把在西安设立研发部门的公司名字列在这里，大家感兴趣自己去了解。</p><p>诺瓦科技（西电的老师开的）、优信二手车、美林数据、交大捷普、交大长天、西电捷通、葡萄城、全时云、神策数据。</p><h3 id="国企" tabindex="-1"><a class="header-anchor" href="#国企" aria-hidden="true">#</a> 国企</h3><p>感觉西安几家国企的性价比略低，工资不高，且大部分加班严重。校招应届硕士工资税前年薪基本都在 15w-20w 之间，本科生的年薪比硕士少 3w 左右。国企相较于私企涨薪会慢很多，不过相对稳定一些。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-e12acc1d-4b6d-4f2e-a352-7155b527fa07.png" alt=""></p><p><strong>中兴</strong></p><p>中兴校招的蓝剑计划还是给的挺多的，去年蓝剑计划给出的薪资包是 40 万以上，不过名额很少，一个大部门就一两个名额。除蓝剑计划外，其它等级的 offer 月薪在 10-15k 之间，每年 14 薪或 15 薪。</p><p><strong>移动</strong></p><p>移动西安研究院和移动雄安研究院都在西安，对，你没听错，雄安研究院也在西安设点了。硕士总包大约 16-19 万，移动的工资一部分会在年底按年终奖的形式发，平常每月发的工资比较少。</p><p><strong>联通</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-33ac9a8b-04d3-4adb-8482-e725e25bb2f9.png" alt=""></p><p>西安联通软件研究院，应届硕士的总包和移动差不多，大约 16-19 万。不过联通比较清闲，大部分部门都能下午六点就下班。目前在网上的评价相对好一些。</p><p><strong>大唐</strong></p><p>大唐的加班挺严重的，周内需要有三天加班到九点。周末需要加够 8 个小时的班。</p><p><strong>烽火星空</strong></p><p>当时来学校校招时，说工资会在 10-20k 之间，根据面试表现进行工资评定。最近在听说加班比较严重。</p><p><strong>太极集团</strong></p><p>最初 12306 主要就是太极开发的 ，刚搬来西安不久，硕士工资水平是到手 7-8k 每月，每年 13 薪。工作稳定。出差多，加上出差补助的话每个月收入还可以。</p><p><strong>荣耀</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-19d21a8f-6a45-408a-9f0f-ae8dd40bdbb1.png" alt=""></p><p>荣耀目前的招人需求是很大的，工作强度未知，薪资水平目前是完全对标华为的。</p><p><strong>南瑞</strong></p><p>南瑞是国家电网的技术型研究院，目前的项目也基本都是围绕电力行业的。南瑞的校招工资会在基础上根据学历来价钱。西安的校招工资年薪也在 15-20w 这个范围内。大部分部门出差比较多。</p><p><strong>润联科技</strong></p><p>工作稳定、薪资还可以。不过润联科技深圳那边相对好一点。</p><h3 id="银行软件开发中心" tabindex="-1"><a class="header-anchor" href="#银行软件开发中心" aria-hidden="true">#</a> 银行软件开发中心</h3><p>除了银行软件开发中心，各省分行的科技部门大家也可以去考虑，这里就不展开介绍了。银行的软件开发中心待遇水平是不错的，且基本都属于总行编制，生活稳定。目前对于准备留在西安的同学来说，去银行的软件开发中心是一个不错的选择。但近年来有一股银行软件开发中心子公司化的浪潮，今后的稳定性未知。</p><p><strong>农行软开</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-cfa06bd9-abd6-455e-bd5c-aef4c90f7edb.png" alt=""></p><p>农行软开目前是在西安工作的最好的几个选择之一，硕士每月到手 12k，本科生少几百块钱，年终奖 2-4 个月。大部分部门都能晚上 7 点以前下班，并且周末双休。目前农行软开有子公司化软件开发中心的计划，听消息说可以选择去子公司，也可以留在软开。目前西安的农行软开也越来越卷，大部分的 offer 都给了西电、西交、西工大这三个学校了，另外这三个学校的学生现在也不是想去农行就能去了。农行软开有个硬性规定是必须通过六级才能报。</p><p><strong>工行软开</strong></p><p>西安的工行软开属于总行序列。本科生和硕士生进入工行后职级都是助理经理，年薪总包 20 万左右，本科生每月工资就比硕士生少几百块钱。工行软开每月发的工资会少一些，然后年终会一下发好几万的年终奖。本科生需要两年才能升经理一，硕士需要一年就可以升 经理一。升到 经理一 后表现好一年就可以升 经理二，不过从助理经理到经理二的薪资涨幅不大。从毕业到升职成为经理三（相当于组长）最快需要五年，经理三的年薪还是很可观的。</p><p>读者补充：西安工行周一、周二、周四需要加班</p><p><strong>中行软开</strong></p><p>西安的中国银行软件开发中心给应届硕士的报价是年薪 13 万，大家可以参考一下。</p><p>中行软开的技术面试一般问的技术问题比较少，都是最基本的问题，比较简单。</p><p><strong>浙商银行</strong></p><p>浙商银行在银行软开中给的工资算多的，西安硕士的年薪包是 25-28 万，本科生的年包是 19-23 万。也算一个还不错的选择了。</p><p><strong>浦发银行</strong></p><p>浦发银行在西安的软件开发中心被子公司化了。工资本科是（5-7k）*24，硕士是 7.5k *24。这个工资是什么意思呢，就是每个月给你 5-7k，然后年底再一下子给你发 12 个月的工资当成年终奖。</p><p><strong>邮政银行</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-946ce62c-0afc-48c8-b570-fab660d2ea13.png" alt=""></p><p>邮储银行软件开发中心在西安刚成立，还不太确定。目前宣传是年包 28 万以上，工作强度目测比较大。</p><p><strong>中信建投</strong></p><p>中信建投刚落在西安不久，今年已经开始校招了。中信建投目前在西安算是性价比最高的几个好去处之一，工资水平较高，每年发18个月的工资，而且大部分部门加班不怎么严重。中信建投YYDS。不过目前中信建投学历卡的比较严，要求硕士985，同时本科还要求211，偶尔会放宽松一点本科的条件。</p><h3 id="外企" tabindex="-1"><a class="header-anchor" href="#外企" aria-hidden="true">#</a> 外企</h3><p>一般情况下，外企的工作强度会更小一点，基本都是 955 和 965 的样子。</p><p><strong>三星</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-31302c7c-7dcd-4f12-b624-872b4878670d.png" alt=""></p><p>大部分应届生都是（11-14)k *13.5k。965 工作制。几乎都是芯片、运维相关岗位。</p><p>有读者补充：三星工作制度是855，16薪。可以参考。</p><p><strong>SAP</strong></p><p>SAP 是一家做企业软件的德企，技术十分强大。硕士年薪 20 万左右，本科生年薪 15 万左右。</p><p>不过，我有一个同学去 SAP 面试之后回来说面试体验非常差。</p><p>读者补充：西安现在的SAP是原来的SyBase西安分公司，由于后者整体被前者收购了，所以后者在西安的分公司自然而然的变成了前者的分公司，和北京SAP分公司，上海、成都的研究员的文化都不太一样。</p><p><strong>Thougtworks</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-167d941b-740e-4342-9d28-1ba753766398.png" alt=""></p><p>在 Thoughtworks 工作是很舒服的，开放式办公、扁平化管理、技术氛围浓厚。工资本硕都是 13k x 14。</p><p>ThougtWorks 的新人培养机制还是很赞的！对于应届生入职 ThougtWorks 的话，在你正式上手做项目之前会有 1 个月左右的培训时间。社招的话，整个流程一般会比较简单点，相关人员带你了解了公司的基本情况后，后面可能就会让你开始上手做项目了。</p><p><strong>其他</strong></p><p>听说汇丰和爱立信在西安也有软件开发中心，大家感兴趣可以自行去了解。</p><p>读者补充：爱立信在西安的不是研发中心（其研发在上海、成都，北京也有但是小，硬件研发在南京），而是运维和交付中心。</p><p>读者补充：汇丰在西安的不是汇丰总公司的软开，而是收购的的一家子公司，也是家银行的软开，但是待遇也不差，有在招开发和测试。</p><h3 id="研究所" tabindex="-1"><a class="header-anchor" href="#研究所" aria-hidden="true">#</a> 研究所</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-872dc3ff-316d-4194-b549-f998b39feedf.png" alt=""></p><p>西安航空航天类的研究所特别多，我知道的招计算机方面的研究所有航天 504 所、771 所，航空 631 所、618 所、603 所，中电 20 所、39 所，兵器工业 203 所、204 所、205 所。</p><p>这些研究所中，待遇最好的是航天 504 所，但是招人的要求很高，目前校招进去的大部分是博士，双 985 硕士（就是本科和研究生都毕业于 985 高校）想进都很难。其次 618 所和兵器工业的研究所待遇还不错，这几个研究所招聘有一个隐形的要求就是双 985 硕士。其它所的性价比就比较差了。631 所曾经被誉为西北第一神所，但目前的效益也不行了，现在的待遇是年薪 10 万，第一年额外会给 5 万的安家费。</p><h3 id="外包" tabindex="-1"><a class="header-anchor" href="#外包" aria-hidden="true">#</a> 外包</h3><p>西安有的几家比较大的是中软国际、软通动力和文思海辉。中软国际和软通动力主要是在给华为做外包，工作强度几乎和华为基本一样。外包的性价比不太高哈。</p><h2 id="生活" tabindex="-1"><a class="header-anchor" href="#生活" aria-hidden="true">#</a> 生活</h2><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-980c455e-1858-4c52-8c4f-5c1b0ed996b4.png" alt=""></p><p>陕西的资源基本都集中在西安，从人口上也能看出西安的资源有多集中。整个陕西三千多万人，在西安就有一千多万。并且这些年中央对西安的扶植力度越来越大。</p><h3 id="房价" tabindex="-1"><a class="header-anchor" href="#房价" aria-hidden="true">#</a> 房价</h3><p>西安的房价从 18 年到现在翻了一倍，但就目前的房价相较于其它同类型城市算是比较友好的。现在西安的房价最贵的在曲江、第二贵是高新区。其它地方的房价差不多一万六左右吧，不过今年的全运会过后可能会长一波。按照程序员的工资来说，在西安买房的问题不算很大，这也是程序员待在西安比较舒服的地方。对于程序员来说，租房的压力相对较小，我同学有在农行软开工作的，在附近租了一个一居室的开间四十平左右，一个月一千五，上班步行用不了十分钟。高新那边租房贵一些，你愿意合租的话压力也不大。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-b905fada-e4a5-4a0a-a704-cbf9f310be6c.png" alt=""></p><p>西安住建前段时间出了二手房交易参考价格，我贴在下面大家可以参考下，不过这个价格感觉低于市场价了。我感觉这直接打了个八折~西安住建发布二手房交易参考价格的链接在这里 https://mp.weixin.qq.com/s/Gis7kIJklWygTseztydDaw</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-c22be12f-8426-487d-b256-96d7e8950762.png" alt="image-20210720212848036"></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-fb06e9b2-ba0b-46d3-b84a-5449a77dc6ae.png" alt="image-20210720212821035"></p><h3 id="教育资源" tabindex="-1"><a class="header-anchor" href="#教育资源" aria-hidden="true">#</a> 教育资源</h3><p>西安的教育资源很好。高中教育资源方面，西安的名校众多。西工大附中、西安铁一中、高新一中、交大附中、陕师大附中这些学校在全国都是很有名的，另外还有一批在陕西省很有名的高中也很不错。大学教育资源方面，整个陕西有三所 985，西工大和西安交大都在西安，西北农林科技大学就在离西安不远的杨凌。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-d905fc96-b354-45fa-b6aa-cfb4e2171eb7.png" alt=""></p><p>另外，还有像西安电子科技大学、西北大学、陕西师范大学、长安大学、第四军医大学这些不错的 211，还有像西安邮电、西安理工、西安科技大学、西安工业大学等等这些不错的双非院校。西安每年产出的人才的数量是很庞大的。这是很值得西安自豪的一点，但是这也造成了一个问题，西安就业十分的内卷。有一个现象是陕西人都愿意在西安，不愿意出来，计算去外面上学的陕西人毕业也大部分都回到了西安，另外在西安上过学的也大部分留在了西安。西安的几个效益比较好的研究所、银行软开的应聘难度比在北京的同级别单位都难很多。内卷不仅表现在计算机，计算机算好的，我了解到目前好多西安的小学老师都敢只要 211 以上毕业的硕士生。</p><h3 id="医疗资源" tabindex="-1"><a class="header-anchor" href="#医疗资源" aria-hidden="true">#</a> 医疗资源</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-e6f524ec-e353-48c2-b89a-cd2ca6373924.png" alt=""></p><p>医疗资源方面西安也很给力，交大一附院、交大二附院、唐都医院、西京医院、红会医院都是放在全国都很强的，另外其他一批省内比较有名的医院也很不错。</p><h3 id="交通" tabindex="-1"><a class="header-anchor" href="#交通" aria-hidden="true">#</a> 交通</h3><p>西安的交通方面不敢恭维，堵车那是一绝，我的感觉是西安比北京都要堵。西安的地铁 21 年初新开了 3 条线路，目前共有 8 条线路才勉强够的上需求。每逢法定节假日，旅游的人都会把西安挤炸。说到旅游，近年来西安对游客的吸引力是越来越大，一方面西安在弘扬大唐文化，另一方面西安的美食也叫一个美滴很。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-e3de7963-bfcf-4b37-9306-ff9939202208.png" alt=""></p><p>另外，大唐不夜城这里的人是真的多，尤其是夏天，晚上的时候基本打不到车！</p><h3 id="气候" tabindex="-1"><a class="header-anchor" href="#气候" aria-hidden="true">#</a> 气候</h3><p>气候方面，西安从 5 月初开始就开启高温模式，一直延续到 10 月中旬。我第一次去西安时是 8 月份，坐着动车，每个从动车下来的人都会情不自禁的喊一声妈呀。西安的热不止是白天热，晚上也很热，每年七八月份不开空调是别想睡觉的。</p><p>不过，西安的天气相比于武汉来说要好很多。我之前也去过武汉，又热有潮湿，天气还多变，真的顶不住！</p><h2 id="做个总结" tabindex="-1"><a class="header-anchor" href="#做个总结" aria-hidden="true">#</a> 做个总结</h2><p>综上所述，西安目前正处在高速上升的阶段，互联网行业相对北上广深杭还有一定的差距，相比与成都也还稍差一点。但是西安绝对是有潜力的，并且目前西安的房价还是比较友好的。大家如果能选择在西安发展，生活幸福感会比较高。</p><blockquote><p>作者：大白，转载链接：<a href="https://mp.weixin.qq.com/s/s0Ub1CHC9eEi0YrqPrnRog" target="_blank" rel="noopener noreferrer">https://mp.weixin.qq.com/s/s0Ub1CHC9eEi0YrqPrnRog<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon 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class="sidebar-sub-header"><a aria-current="page" href="/cityselect/xian.html#外企" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="外企"><!---->外企<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/xian.html#研究所" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="研究所"><!---->研究所<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/xian.html#外包" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="外包"><!---->外包<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/xian.html#生活" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="生活"><!---->生活<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/xian.html#房价" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="房价"><!---->房价<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/xian.html#教育资源" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="教育资源"><!---->教育资源<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/xian.html#医疗资源" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="医疗资源"><!---->医疗资源<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/xian.html#交通" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="交通"><!---->交通<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/xian.html#气候" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="气候"><!---->气候<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/xian.html#做个总结" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="做个总结"><!---->做个总结<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/cityselect/zhengzhou.html" class="nav-link sidebar-link sidebar-page" aria-label="郑州"><!---->郑州<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/jinan.html" class="nav-link sidebar-link sidebar-page" aria-label="济南"><!---->济南<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->西安都有哪些值得加入的IT互联网公司？</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月27日</span><meta property="datePublished" content="2022-03-27T08:36:50.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category4" role>求职面试</li><meta property="articleSection" content="求职面试"></ul></span><span 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class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/xian.html#工作机会" class="router-link-active router-link-exact-active toc-link level2">工作机会</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/xian.html#互联网" class="router-link-active router-link-exact-active toc-link level3">互联网</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/xian.html#国企" class="router-link-active router-link-exact-active toc-link level3">国企</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/xian.html#银行软件开发中心" class="router-link-active router-link-exact-active toc-link level3">银行软件开发中心</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/xian.html#外企" class="router-link-active router-link-exact-active toc-link 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href="/cityselect/xian.html#医疗资源" class="router-link-active router-link-exact-active toc-link level3">医疗资源</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/xian.html#交通" class="router-link-active router-link-exact-active toc-link level3">交通</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/xian.html#气候" class="router-link-active router-link-exact-active toc-link level3">气候</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/xian.html#做个总结" class="router-link-active router-link-exact-active toc-link level2">做个总结</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="西安都有哪些值得加入的it互联网公司" tabindex="-1"><a class="header-anchor" href="#西安都有哪些值得加入的it互联网公司" aria-hidden="true">#</a> 西安都有哪些值得加入的IT互联网公司？</h1><p>2019 年国庆节的时候去了一趟西安，和朋友一起，开车去的，大概 4 个多小时的车程，从洛阳到西安，不算太远。</p><p>令我印象最深刻的就是，在城墙下面的乒乓球场上遇到了一个大叔，他说自己曾经是西安市长的司机，光自己家里就 8 套房，父母那边还一些。记得当时还发了一个票圈，家里只有一个女儿~~~~~~~~~~~~</p><p>大叔穿着很随意，说话也非常和蔼，完全想象不到他年轻时的风采。</p><p>所以，西安给我的印象挺特别的。今天就来给大家聊聊西安都有哪些不错的互联网公司，上次发了青岛后呼声最高。其实，我和西安的缘分还是挺深的，纯洁的微笑、江南一点雨，都算是西安那边的。</p><h2 id="工作机会" tabindex="-1"><a class="header-anchor" href="#工作机会" aria-hidden="true">#</a> 工作机会</h2><p>其实西安在前些年，还被称为互联网荒漠，程序员生存的空间很小。</p><p>在 18 年我刚到西安上研究生的时候，我们专业的学长学姐想留在西安，可选择的也只有华为、中兴以及几个研究所。但也正好是我读研的这几年，不断的有大企业在西安设点，并且将研发部门搬到西安。目前西安的互联网环境已经初具规模，对于计算机相关专业的学生，毕业留在西安也是一个不错的选择。同时这些年西安的互联网环境也在持续向好，不断有大公司在西安设立研发中心。</p><p>同时，西安的互联网环境还处在一个开拓期，几乎所有的大企业都在西安设立研发中心不久，所以除了有限的几个公司和部门比较轻松外，其它加班都比较严重，并且有限的几个公司和部门的情况也在变化中。</p><p>下面就分私企、国企、银行软件开发中心、研究所几大类来介绍西安招计算机相关专业的公司。各个公司的信息是根据我的了解以及和留在西安各个公司的同学打听所收集的，并且收集了部分网上信息。由于社招薪资水平根据每个人的情况相差较大，所以在介绍的时候比较多的提到的是校招的薪资，大家可以参考西安和其它城市的校招薪资来评估西安社招的薪资水平。</p><h3 id="互联网" tabindex="-1"><a class="header-anchor" href="#互联网" aria-hidden="true">#</a> 互联网</h3><p><strong>华为</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-4e82d879-bbe0-4bc5-a088-fadc84483d65.png" alt=""></p><p>如果想在西安快速挣钱的话，华为几乎是最好的选择了，按照华为的工资水平在西安买房根本没有压力。华为在西安的建制很齐全，消费者、CloudBu、云核心等事业群以及<code>华为海思</code>，2012 实验室都有。但是因为去年美国对华为的打压，消费者、华为海思以及 2012 实验室这些之前很香的事业群目前日子都不太好过。</p><p>西安华为校招根据面试评分给应届生进行评级，本科生和硕士生的评级在 13 级 和 15 级 之间，每一级又分为 A、B、C 三个档。根据评级进行工资的评定，13 级 和 14 级 的税前工资在每月 13-19k 之间，每年 14 薪。15 级 需要特别优秀的硕士才能拿到，工资年包基本在税前 30 万 - 40 万之间。华为在西安的校招薪资水平还是很高的，几乎和北京持平了。</p><p>华为在西安的社招我不是特别清楚，只是知道华为社招大部分给的是 OD ，社招想拿正式 offer 基本都需要 16 级以上的评级。</p><p>在华为上班是压力比较大，也比较累的。据我了解，西安华为的 CloudBu 这个事业群下的部门还相对轻松。这个事业部下的部门基本上半年轻松半年忙。在项目不忙的时候，一般工作的节奏是早上 9 点，周二和周四常态化加班到晚 9 点，周一三五 6 点 以后就可以走。每个月的最后一个周，周六要常态化加班。华为产品线的部门是相当忙的，加班到几点就说不好了。不过华为的加班费是给的相当到位的，不会让你白加班的。另外外界对华为员工的技术认可度是比较高的，从华为跳出来去西安的任何一家技术公司都没太大压力。</p><p>读者补充：华为现在除非是应届生，否则基本是OD（Outsourcing Dispacth，也是一种外包，和FESCO签合同，但直系领导都是华为的人，而不是在乙方公司的团队里给甲方华为干活），不能拿股票。如果你想赚钱，可以放弃一切顶住压力，去华为还不错，但也要注意部门，无线网，核心网，还有现在的车联网还不错，但是不建议考虑现在的终端了。</p><p><strong>阿里巴巴</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-135b1f20-48ad-4295-bc50-40969ef023b0.png" alt=""></p><p>阿里巴巴还没大范围的在西安招人，情况目前还不太清楚。我问过阿里巴巴的员工，只知道目前在西安设点的部门是阿里云，需要半年在杭州上班，半年在西安上班，工资水平和杭州一致。不过目前招的量比较小，基本都是招高p，主要是做售前的业务架构设计，只有很少的校招名额。</p><p><strong>京东</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-c9b0621d-f56c-42a0-a618-f261466f06a4.png" alt=""></p><p>京东把京东物流的团队设在了西安航天城，目测团队规模在几百人，工资水平大约是京东在北京工资的 80%。大家可以参考一下，京东去年在北京的部门，校招普通 offer 是年包 28 万，sp 是年包 32.9 万。</p><p>一位在西安京东的读者补充：上班早9点晚7点，周六没有培训不用来。</p><p><strong>腾讯云</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-67aa194e-52b0-4acb-b22b-1c1f4c09fac8.png" alt=""></p><p>腾讯云是腾讯的全资子公司，目前对这里褒贬不一。校招薪资水平本科和硕士生大概是月薪 13-16k，每年 16 薪，大家可以参考一下，腾讯 21 届校招的薪资是 17-21.5k ，每年 18 薪。社招我看一个本科毕业四年经验的老哥拿到的年包是 33 万。腾讯云的职级和腾讯不是对齐的，并且业务比较边缘，这也是网上被喷的一个主要原因。目前西安腾讯云创立时间不久，加班强度是比较大的。</p><p><strong>字节跳动、小米、ViVO、OPPO</strong></p><p>小米已经确定在西安设立研发中心了，但具体是哪些部门还不太清楚。字节跳动之前在西安的部门是审核相关的岗位，目前也有较为确定的消息会在西安设立研发中心，大家感兴趣的话持续关注。今年vivo在线高新环普也设立研发部门了，听说待遇不错。OPPO在西安也是刚设立研发部门不久，招人比较疯狂，听说加班也很疯狂。</p><p><strong>广联达</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-9180be40-265e-42e5-9a85-4d61193b8798.png" alt=""></p><p>广联达西安的部门在针对 21 届毕业生的校招中开出的薪资是很有诚意的。给应届硕士的 sp 是 19k x 15，普通 offer 是 17k x 15，本科生每月基本都在 13-17k 之间。广联达工作制度基本是 965 或者 975，每个月还有一天的带薪病假。这还要啥自行车？不过广联达曾经也有过黑料，大家自行上网了解。</p><p><strong>浙江大华、海康威视</strong></p><p>海康威视其实是国企，但是海康威视和大华工作强度和待遇方面特别一致，就放一块说了。大华和海康威视在西安都有设立研发基地的，并且招人很多。这哥俩目前在网上被喷的比较狠，据说工作强度很大，但工资水平又很低，并且涨薪缓慢。大家如果想去进一步了解可以去找这两个厂子的员工哈。</p><p><strong>360</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-327db5f0-4061-48c3-b672-b1670f98325f.png" alt=""></p><p>360 在西安只有一个几十人的团队。没听说过这里有校招，社招的话 3 年以上经验的差不多能每月给到 20k 。有说在这里待的舒服的，也有喷的。</p><p><strong>奇安信</strong></p><p>奇安信在校招的工资和中兴差不多，年薪 20 万 左右，工作制度是 1085。在西安招的人还是挺多的。</p><p><strong>科大讯飞</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-3592f841-8390-4399-ae8a-94c4368541ea.png" alt=""></p><p>科大讯飞西安丝路总部主要是算法岗，不过我看网上喷的比较多。据说是活多钱少。</p><p><strong>大疆</strong></p><p>在西安的岗位只有相机嵌入式和测试岗位，工资比华为还要略高。</p><p><strong>OPPO</strong></p><p>21 年年初刚在西安成立，最近疯狂招人。加班严重。</p><p><strong>绿盟</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-b70c6624-f4f1-453f-9ec8-5db22661bb18.png" alt=""></p><p>绿盟算是中型企业里比较香的，绿盟在安全领域还是比较强的。工资比较低，硕士校招才能给到 14k x 14，但是这家公司几乎不加班，员工的离职率也一直很低，我同学有违约中兴三方去绿盟的。</p><p>读者补充：最近在绿盟科技实习测试，深切体会到养老型公司。不加班。</p><p><strong>当当网</strong></p><p>早 9 晚 8 点半，周末双休。组内氛围还不错</p><p><strong>交叉信息核心技术研究院</strong></p><p>主要做人工智能。背景很强大。大佬姚期智带队，有 30 位清华交叉信息研究院的教授参与运营。招人的要求很高。</p><p><strong>寒武纪</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-fdf08fc3-d216-4382-913d-5f8b78b8e7df.png" alt=""></p><p>寒武纪是做智能芯片的公司，背后站着中科院计算所。2019 年落户的西咸新区，相关信息比较少。我知道的是加班比较多，不过薪资也高。</p><p><strong>其他</strong></p><p>其它的中型私企我就不一个个点评了，我把在西安设立研发部门的公司名字列在这里，大家感兴趣自己去了解。</p><p>诺瓦科技（西电的老师开的）、优信二手车、美林数据、交大捷普、交大长天、西电捷通、葡萄城、全时云、神策数据。</p><h3 id="国企" tabindex="-1"><a class="header-anchor" href="#国企" aria-hidden="true">#</a> 国企</h3><p>感觉西安几家国企的性价比略低，工资不高，且大部分加班严重。校招应届硕士工资税前年薪基本都在 15w-20w 之间，本科生的年薪比硕士少 3w 左右。国企相较于私企涨薪会慢很多，不过相对稳定一些。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-e12acc1d-4b6d-4f2e-a352-7155b527fa07.png" alt=""></p><p><strong>中兴</strong></p><p>中兴校招的蓝剑计划还是给的挺多的，去年蓝剑计划给出的薪资包是 40 万以上，不过名额很少，一个大部门就一两个名额。除蓝剑计划外，其它等级的 offer 月薪在 10-15k 之间，每年 14 薪或 15 薪。</p><p><strong>移动</strong></p><p>移动西安研究院和移动雄安研究院都在西安，对，你没听错，雄安研究院也在西安设点了。硕士总包大约 16-19 万，移动的工资一部分会在年底按年终奖的形式发，平常每月发的工资比较少。</p><p><strong>联通</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-33ac9a8b-04d3-4adb-8482-e725e25bb2f9.png" alt=""></p><p>西安联通软件研究院，应届硕士的总包和移动差不多，大约 16-19 万。不过联通比较清闲，大部分部门都能下午六点就下班。目前在网上的评价相对好一些。</p><p><strong>大唐</strong></p><p>大唐的加班挺严重的，周内需要有三天加班到九点。周末需要加够 8 个小时的班。</p><p><strong>烽火星空</strong></p><p>当时来学校校招时，说工资会在 10-20k 之间，根据面试表现进行工资评定。最近在听说加班比较严重。</p><p><strong>太极集团</strong></p><p>最初 12306 主要就是太极开发的 ，刚搬来西安不久，硕士工资水平是到手 7-8k 每月，每年 13 薪。工作稳定。出差多，加上出差补助的话每个月收入还可以。</p><p><strong>荣耀</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-19d21a8f-6a45-408a-9f0f-ae8dd40bdbb1.png" alt=""></p><p>荣耀目前的招人需求是很大的，工作强度未知，薪资水平目前是完全对标华为的。</p><p><strong>南瑞</strong></p><p>南瑞是国家电网的技术型研究院，目前的项目也基本都是围绕电力行业的。南瑞的校招工资会在基础上根据学历来价钱。西安的校招工资年薪也在 15-20w 这个范围内。大部分部门出差比较多。</p><p><strong>润联科技</strong></p><p>工作稳定、薪资还可以。不过润联科技深圳那边相对好一点。</p><h3 id="银行软件开发中心" tabindex="-1"><a class="header-anchor" href="#银行软件开发中心" aria-hidden="true">#</a> 银行软件开发中心</h3><p>除了银行软件开发中心，各省分行的科技部门大家也可以去考虑，这里就不展开介绍了。银行的软件开发中心待遇水平是不错的，且基本都属于总行编制，生活稳定。目前对于准备留在西安的同学来说，去银行的软件开发中心是一个不错的选择。但近年来有一股银行软件开发中心子公司化的浪潮，今后的稳定性未知。</p><p><strong>农行软开</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-cfa06bd9-abd6-455e-bd5c-aef4c90f7edb.png" alt=""></p><p>农行软开目前是在西安工作的最好的几个选择之一，硕士每月到手 12k，本科生少几百块钱，年终奖 2-4 个月。大部分部门都能晚上 7 点以前下班，并且周末双休。目前农行软开有子公司化软件开发中心的计划，听消息说可以选择去子公司，也可以留在软开。目前西安的农行软开也越来越卷，大部分的 offer 都给了西电、西交、西工大这三个学校了，另外这三个学校的学生现在也不是想去农行就能去了。农行软开有个硬性规定是必须通过六级才能报。</p><p><strong>工行软开</strong></p><p>西安的工行软开属于总行序列。本科生和硕士生进入工行后职级都是助理经理，年薪总包 20 万左右，本科生每月工资就比硕士生少几百块钱。工行软开每月发的工资会少一些，然后年终会一下发好几万的年终奖。本科生需要两年才能升经理一，硕士需要一年就可以升 经理一。升到 经理一 后表现好一年就可以升 经理二，不过从助理经理到经理二的薪资涨幅不大。从毕业到升职成为经理三（相当于组长）最快需要五年，经理三的年薪还是很可观的。</p><p>读者补充：西安工行周一、周二、周四需要加班</p><p><strong>中行软开</strong></p><p>西安的中国银行软件开发中心给应届硕士的报价是年薪 13 万，大家可以参考一下。</p><p>中行软开的技术面试一般问的技术问题比较少，都是最基本的问题，比较简单。</p><p><strong>浙商银行</strong></p><p>浙商银行在银行软开中给的工资算多的，西安硕士的年薪包是 25-28 万，本科生的年包是 19-23 万。也算一个还不错的选择了。</p><p><strong>浦发银行</strong></p><p>浦发银行在西安的软件开发中心被子公司化了。工资本科是（5-7k）*24，硕士是 7.5k *24。这个工资是什么意思呢，就是每个月给你 5-7k，然后年底再一下子给你发 12 个月的工资当成年终奖。</p><p><strong>邮政银行</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-946ce62c-0afc-48c8-b570-fab660d2ea13.png" alt=""></p><p>邮储银行软件开发中心在西安刚成立，还不太确定。目前宣传是年包 28 万以上，工作强度目测比较大。</p><p><strong>中信建投</strong></p><p>中信建投刚落在西安不久，今年已经开始校招了。中信建投目前在西安算是性价比最高的几个好去处之一，工资水平较高，每年发18个月的工资，而且大部分部门加班不怎么严重。中信建投YYDS。不过目前中信建投学历卡的比较严，要求硕士985，同时本科还要求211，偶尔会放宽松一点本科的条件。</p><h3 id="外企" tabindex="-1"><a class="header-anchor" href="#外企" aria-hidden="true">#</a> 外企</h3><p>一般情况下，外企的工作强度会更小一点，基本都是 955 和 965 的样子。</p><p><strong>三星</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-31302c7c-7dcd-4f12-b624-872b4878670d.png" alt=""></p><p>大部分应届生都是（11-14)k *13.5k。965 工作制。几乎都是芯片、运维相关岗位。</p><p>有读者补充：三星工作制度是855，16薪。可以参考。</p><p><strong>SAP</strong></p><p>SAP 是一家做企业软件的德企，技术十分强大。硕士年薪 20 万左右，本科生年薪 15 万左右。</p><p>不过，我有一个同学去 SAP 面试之后回来说面试体验非常差。</p><p>读者补充：西安现在的SAP是原来的SyBase西安分公司，由于后者整体被前者收购了，所以后者在西安的分公司自然而然的变成了前者的分公司，和北京SAP分公司，上海、成都的研究员的文化都不太一样。</p><p><strong>Thougtworks</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-167d941b-740e-4342-9d28-1ba753766398.png" alt=""></p><p>在 Thoughtworks 工作是很舒服的，开放式办公、扁平化管理、技术氛围浓厚。工资本硕都是 13k x 14。</p><p>ThougtWorks 的新人培养机制还是很赞的！对于应届生入职 ThougtWorks 的话，在你正式上手做项目之前会有 1 个月左右的培训时间。社招的话，整个流程一般会比较简单点，相关人员带你了解了公司的基本情况后，后面可能就会让你开始上手做项目了。</p><p><strong>其他</strong></p><p>听说汇丰和爱立信在西安也有软件开发中心，大家感兴趣可以自行去了解。</p><p>读者补充：爱立信在西安的不是研发中心（其研发在上海、成都，北京也有但是小，硬件研发在南京），而是运维和交付中心。</p><p>读者补充：汇丰在西安的不是汇丰总公司的软开，而是收购的的一家子公司，也是家银行的软开，但是待遇也不差，有在招开发和测试。</p><h3 id="研究所" tabindex="-1"><a class="header-anchor" href="#研究所" aria-hidden="true">#</a> 研究所</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-872dc3ff-316d-4194-b549-f998b39feedf.png" alt=""></p><p>西安航空航天类的研究所特别多，我知道的招计算机方面的研究所有航天 504 所、771 所，航空 631 所、618 所、603 所，中电 20 所、39 所，兵器工业 203 所、204 所、205 所。</p><p>这些研究所中，待遇最好的是航天 504 所，但是招人的要求很高，目前校招进去的大部分是博士，双 985 硕士（就是本科和研究生都毕业于 985 高校）想进都很难。其次 618 所和兵器工业的研究所待遇还不错，这几个研究所招聘有一个隐形的要求就是双 985 硕士。其它所的性价比就比较差了。631 所曾经被誉为西北第一神所，但目前的效益也不行了，现在的待遇是年薪 10 万，第一年额外会给 5 万的安家费。</p><h3 id="外包" tabindex="-1"><a class="header-anchor" href="#外包" aria-hidden="true">#</a> 外包</h3><p>西安有的几家比较大的是中软国际、软通动力和文思海辉。中软国际和软通动力主要是在给华为做外包，工作强度几乎和华为基本一样。外包的性价比不太高哈。</p><h2 id="生活" tabindex="-1"><a class="header-anchor" href="#生活" aria-hidden="true">#</a> 生活</h2><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-980c455e-1858-4c52-8c4f-5c1b0ed996b4.png" alt=""></p><p>陕西的资源基本都集中在西安，从人口上也能看出西安的资源有多集中。整个陕西三千多万人，在西安就有一千多万。并且这些年中央对西安的扶植力度越来越大。</p><h3 id="房价" tabindex="-1"><a class="header-anchor" href="#房价" aria-hidden="true">#</a> 房价</h3><p>西安的房价从 18 年到现在翻了一倍，但就目前的房价相较于其它同类型城市算是比较友好的。现在西安的房价最贵的在曲江、第二贵是高新区。其它地方的房价差不多一万六左右吧，不过今年的全运会过后可能会长一波。按照程序员的工资来说，在西安买房的问题不算很大，这也是程序员待在西安比较舒服的地方。对于程序员来说，租房的压力相对较小，我同学有在农行软开工作的，在附近租了一个一居室的开间四十平左右，一个月一千五，上班步行用不了十分钟。高新那边租房贵一些，你愿意合租的话压力也不大。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-b905fada-e4a5-4a0a-a704-cbf9f310be6c.png" alt=""></p><p>西安住建前段时间出了二手房交易参考价格，我贴在下面大家可以参考下，不过这个价格感觉低于市场价了。我感觉这直接打了个八折~西安住建发布二手房交易参考价格的链接在这里 https://mp.weixin.qq.com/s/Gis7kIJklWygTseztydDaw</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-c22be12f-8426-487d-b256-96d7e8950762.png" alt="image-20210720212848036"></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-fb06e9b2-ba0b-46d3-b84a-5449a77dc6ae.png" alt="image-20210720212821035"></p><h3 id="教育资源" tabindex="-1"><a class="header-anchor" href="#教育资源" aria-hidden="true">#</a> 教育资源</h3><p>西安的教育资源很好。高中教育资源方面，西安的名校众多。西工大附中、西安铁一中、高新一中、交大附中、陕师大附中这些学校在全国都是很有名的，另外还有一批在陕西省很有名的高中也很不错。大学教育资源方面，整个陕西有三所 985，西工大和西安交大都在西安，西北农林科技大学就在离西安不远的杨凌。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-d905fc96-b354-45fa-b6aa-cfb4e2171eb7.png" alt=""></p><p>另外，还有像西安电子科技大学、西北大学、陕西师范大学、长安大学、第四军医大学这些不错的 211，还有像西安邮电、西安理工、西安科技大学、西安工业大学等等这些不错的双非院校。西安每年产出的人才的数量是很庞大的。这是很值得西安自豪的一点，但是这也造成了一个问题，西安就业十分的内卷。有一个现象是陕西人都愿意在西安，不愿意出来，计算去外面上学的陕西人毕业也大部分都回到了西安，另外在西安上过学的也大部分留在了西安。西安的几个效益比较好的研究所、银行软开的应聘难度比在北京的同级别单位都难很多。内卷不仅表现在计算机，计算机算好的，我了解到目前好多西安的小学老师都敢只要 211 以上毕业的硕士生。</p><h3 id="医疗资源" tabindex="-1"><a class="header-anchor" href="#医疗资源" aria-hidden="true">#</a> 医疗资源</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-e6f524ec-e353-48c2-b89a-cd2ca6373924.png" alt=""></p><p>医疗资源方面西安也很给力，交大一附院、交大二附院、唐都医院、西京医院、红会医院都是放在全国都很强的，另外其他一批省内比较有名的医院也很不错。</p><h3 id="交通" tabindex="-1"><a class="header-anchor" href="#交通" aria-hidden="true">#</a> 交通</h3><p>西安的交通方面不敢恭维，堵车那是一绝，我的感觉是西安比北京都要堵。西安的地铁 21 年初新开了 3 条线路，目前共有 8 条线路才勉强够的上需求。每逢法定节假日，旅游的人都会把西安挤炸。说到旅游，近年来西安对游客的吸引力是越来越大，一方面西安在弘扬大唐文化，另一方面西安的美食也叫一个美滴很。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/xian-e3de7963-bfcf-4b37-9306-ff9939202208.png" alt=""></p><p>另外，大唐不夜城这里的人是真的多，尤其是夏天，晚上的时候基本打不到车！</p><h3 id="气候" tabindex="-1"><a class="header-anchor" href="#气候" aria-hidden="true">#</a> 气候</h3><p>气候方面，西安从 5 月初开始就开启高温模式，一直延续到 10 月中旬。我第一次去西安时是 8 月份，坐着动车，每个从动车下来的人都会情不自禁的喊一声妈呀。西安的热不止是白天热，晚上也很热，每年七八月份不开空调是别想睡觉的。</p><p>不过，西安的天气相比于武汉来说要好很多。我之前也去过武汉，又热有潮湿，天气还多变，真的顶不住！</p><h2 id="做个总结" tabindex="-1"><a class="header-anchor" href="#做个总结" aria-hidden="true">#</a> 做个总结</h2><p>综上所述，西安目前正处在高速上升的阶段，互联网行业相对北上广深杭还有一定的差距，相比与成都也还稍差一点。但是西安绝对是有潜力的，并且目前西安的房价还是比较友好的。大家如果能选择在西安发展，生活幸福感会比较高。</p><blockquote><p>作者：大白，转载链接：<a href="https://mp.weixin.qq.com/s/s0Ub1CHC9eEi0YrqPrnRog" target="_blank" rel="noopener 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class="title">六、求职面试</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">面试题集合</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">背诵版八股文</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">城市选择</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/cityselect/beijing.html" class="nav-link sidebar-link sidebar-page" aria-label="北京都有哪些牛逼的互联网公司？"><!---->北京都有哪些牛逼的互联网公司？<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/chengdu.html" class="nav-link sidebar-link sidebar-page" aria-label="成都有哪些牛批的互联网公司？"><!---->成都有哪些牛批的互联网公司？<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/guangzhou.html" class="nav-link sidebar-link sidebar-page" aria-label="想去广州了！"><!---->想去广州了！<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/hangzhou.html" class="nav-link sidebar-link sidebar-page" aria-label="杭州有哪些顶级的互联网公司？"><!---->杭州有哪些顶级的互联网公司？<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/nanjing.html" class="nav-link sidebar-link sidebar-page" aria-label="南京有哪些靠谱的互联网公司？"><!---->南京有哪些靠谱的互联网公司？<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/qingdao.html" class="nav-link sidebar-link sidebar-page" aria-label="青岛有牛逼的互联网公司吗？"><!---->青岛有牛逼的互联网公司吗？<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/shenzhen.html" class="nav-link sidebar-link sidebar-page" aria-label="深圳有哪些牛批的互联网公司？"><!---->深圳有哪些牛批的互联网公司？<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/suzhou.html" class="nav-link sidebar-link sidebar-page" aria-label="想搬去苏州生活了。。"><!---->想搬去苏州生活了。。<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/xian.html" class="nav-link sidebar-link sidebar-page" aria-label="西安有哪些不错的互联网公司？"><!---->西安有哪些不错的互联网公司？<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/cityselect/zhengzhou.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="郑州有哪些不错的互联网公司？"><!---->郑州有哪些不错的互联网公司？<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/zhengzhou.html#工作机会" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="工作机会"><!---->工作机会<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/zhengzhou.html#数字郑州" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="数字郑州"><!---->数字郑州<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/zhengzhou.html#中原银行" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="中原银行"><!---->中原银行<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/zhengzhou.html#浪潮" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="浪潮"><!---->浪潮<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/zhengzhou.html#新华三" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="新华三"><!---->新华三<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/zhengzhou.html#uu-跑腿" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="UU 跑腿"><!---->UU 跑腿<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/zhengzhou.html#中原消费金融" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="中原消费金融"><!---->中原消费金融<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/zhengzhou.html#刀锋互娱" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="刀锋互娱"><!---->刀锋互娱<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/zhengzhou.html#新开普" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="新开普"><!---->新开普<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/zhengzhou.html#中移在线" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="中移在线"><!---->中移在线<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/zhengzhou.html#爱云校" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="爱云校"><!---->爱云校<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/zhengzhou.html#妙优车" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="妙优车"><!---->妙优车<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/zhengzhou.html#腾河" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="腾河"><!---->腾河<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/zhengzhou.html#真二网" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="真二网"><!---->真二网<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/zhengzhou.html#硕诺科技" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="硕诺科技"><!---->硕诺科技<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/zhengzhou.html#科大讯飞" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="科大讯飞"><!---->科大讯飞<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/zhengzhou.html#字节跳动" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="字节跳动"><!---->字节跳动<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/zhengzhou.html#其他" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="其他"><!---->其他<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/zhengzhou.html#生活环境-生活成本" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="生活环境&amp;生活成本"><!---->生活环境&amp;生活成本<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/zhengzhou.html#房价" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="房价"><!---->房价<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/zhengzhou.html#教育" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="教育"><!---->教育<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/zhengzhou.html#医疗" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="医疗"><!---->医疗<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/zhengzhou.html#本地居民" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="本地居民"><!---->本地居民<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/zhengzhou.html#交通" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="交通"><!---->交通<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/zhengzhou.html#美食" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="美食"><!---->美食<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li></ul><!--]--></li></ul></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->郑州有哪些不错的互联网公司？</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月27日</span><meta property="datePublished" content="2022-03-27T08:36:50.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category4" role>求职面试</li><meta property="articleSection" content="求职面试"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>城市选择</li></ul><meta property="keywords" content="城市选择"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 11 分钟</span><meta property="timeRequired" content="PT11M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/zhengzhou.html#工作机会" class="router-link-active router-link-exact-active toc-link level2">工作机会</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/zhengzhou.html#数字郑州" class="router-link-active router-link-exact-active toc-link level3">数字郑州</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/zhengzhou.html#中原银行" class="router-link-active router-link-exact-active toc-link level3">中原银行</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/zhengzhou.html#浪潮" class="router-link-active router-link-exact-active toc-link level3">浪潮</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/zhengzhou.html#新华三" class="router-link-active router-link-exact-active toc-link level3">新华三</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/zhengzhou.html#uu-跑腿" class="router-link-active router-link-exact-active toc-link level3">UU 跑腿</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/zhengzhou.html#中原消费金融" class="router-link-active router-link-exact-active toc-link level3">中原消费金融</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/zhengzhou.html#刀锋互娱" class="router-link-active router-link-exact-active toc-link level3">刀锋互娱</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/zhengzhou.html#新开普" class="router-link-active router-link-exact-active toc-link level3">新开普</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/zhengzhou.html#中移在线" class="router-link-active router-link-exact-active toc-link level3">中移在线</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/zhengzhou.html#爱云校" class="router-link-active router-link-exact-active toc-link level3">爱云校</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/zhengzhou.html#妙优车" class="router-link-active router-link-exact-active toc-link level3">妙优车</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/zhengzhou.html#腾河" class="router-link-active router-link-exact-active toc-link level3">腾河</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/zhengzhou.html#真二网" class="router-link-active router-link-exact-active toc-link level3">真二网</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/zhengzhou.html#硕诺科技" class="router-link-active router-link-exact-active toc-link level3">硕诺科技</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/zhengzhou.html#科大讯飞" class="router-link-active router-link-exact-active toc-link level3">科大讯飞</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/zhengzhou.html#字节跳动" class="router-link-active router-link-exact-active toc-link level3">字节跳动</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/zhengzhou.html#其他" class="router-link-active router-link-exact-active toc-link level3">其他</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/zhengzhou.html#生活环境-生活成本" class="router-link-active router-link-exact-active toc-link level2">生活环境&amp;生活成本</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/zhengzhou.html#房价" class="router-link-active router-link-exact-active toc-link level3">房价</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/zhengzhou.html#教育" class="router-link-active router-link-exact-active toc-link level3">教育</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/zhengzhou.html#医疗" class="router-link-active router-link-exact-active toc-link level3">医疗</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/zhengzhou.html#本地居民" class="router-link-active router-link-exact-active toc-link level3">本地居民</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/zhengzhou.html#交通" class="router-link-active router-link-exact-active toc-link level3">交通</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/zhengzhou.html#美食" class="router-link-active router-link-exact-active toc-link level3">美食</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="郑州有哪些不错的互联网公司" tabindex="-1"><a class="header-anchor" href="#郑州有哪些不错的互联网公司" aria-hidden="true">#</a> 郑州有哪些不错的互联网公司？</h1><p>首先我们来看工作机会！</p><p>一位读者的评论我觉得特别的好，我贴到这里给大家看下：</p><p>网名&quot;咔嚓&quot;：作为在郑州工作的前端，表示遇见好厂的话，生活节奏还是很爽的，房租不贵，直接住公司旁边，通勤5分钟，不加班的话，每天晚上6点下班，双休。确实郑州互联网不强，但是，我们也不应该忘了生活本该有的样子啊。</p><h2 id="工作机会" tabindex="-1"><a class="header-anchor" href="#工作机会" aria-hidden="true">#</a> 工作机会</h2><p>郑州的互联网资源还是比较匮乏的，究其原因，我觉得和教育资源的匮乏有非常大的关系。</p><p>教育资源极度匮乏导致好的企业不来，好的企业不来又导致人才外流，恶性循环。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-0cd5c4ac-4e67-4b06-b5a3-20fad836824b.png" alt=""></p><h3 id="数字郑州" tabindex="-1"><a class="header-anchor" href="#数字郑州" aria-hidden="true">#</a> 数字郑州</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-b88e7ee0-5ab7-40af-8d1d-16cd3eae7b97.png" alt="img"></p><p>这个是阿里和郑州的政府合作的，目前评价大家对数字郑州的评价很不错呀，薪资也挺给力的，大家可以看下 Boss 上数字郑州的招聘岗位以及薪资报价呀。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-b1ef6dc9-0859-47fd-9058-a504bf01cd5a.png" alt=""></p><h3 id="中原银行" tabindex="-1"><a class="header-anchor" href="#中原银行" aria-hidden="true">#</a> 中原银行</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-db7b6919-2158-4846-914f-f30e028c0234.png" alt="img"></p><p>中原银行的工资比较高，在郑州生活的话去中原银行是很不错的选择，不过想进中原银行的话，不是校招想进去有点难。薪资水平可以看下 Boss 上的招聘薪资水平。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-ce9e2a6e-8743-49b3-83aa-8719da78b7e1.png" alt=""></p><h3 id="浪潮" tabindex="-1"><a class="header-anchor" href="#浪潮" aria-hidden="true">#</a> 浪潮</h3><p>浪潮在郑州的研发中心法定节假日加班是有加班费的，但平时加班就没有加班费了，每月要求加够50个小时的班。薪资水平大家也可以参考下 Boss 上放出的招聘薪资水平。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-ef0fe9a0-eff2-4037-96d2-ab84a2f76491.png" alt=""></p><h3 id="新华三" tabindex="-1"><a class="header-anchor" href="#新华三" aria-hidden="true">#</a> 新华三</h3><p>新华三大部分情况下能双休，周末加班也有加班费，不过涨薪很缓慢。在网上看到一个帖子，有人问 offer 选西安中兴还算郑州新华三，中兴和华三的职工都在互相劝退，说这是一个送命题。薪资水平大家还是参考下Boss上的招聘薪资水平吧。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-caa46657-f65d-4965-b553-c9f4502f3cc9.png" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-62496f27-fe20-45c6-b116-90a38e607a09.jpg" alt="点击并拖拽以移动"></p><h3 id="uu-跑腿" tabindex="-1"><a class="header-anchor" href="#uu-跑腿" aria-hidden="true">#</a> UU 跑腿</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-624dd61d-2b19-4cb6-b4b6-e1b813fd6baf.png" alt=""></p><p>UU 跑腿主要提供同城送件服务，是郑州本土最大的互联网公司，隶属于郑州时空隧道信息技术有限公司，地址位于郑州市金水区。</p><p>UU 跑腿的工作环境以及各种福利都还算不错！</p><p>面试的话，总体体验还不错，技术面试一般问的还比较全面。拿 Java 后端开发来说，像 SQL 优化、分布式、缓存这些一般都会问到。</p><p>薪资的话，看准网上的平均薪资是 10k 附近，其中后端开发的薪资在 14k 附近，前端开发的薪资在 10k 附近，软件测试的薪资在 10k 附近(薪资水平仅供参考，实际情况因人和岗位或许会有一些出入)。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-b3a5d176-a10b-4637-a349-06197ee984a8.png" alt=""></p><h3 id="中原消费金融" tabindex="-1"><a class="header-anchor" href="#中原消费金融" aria-hidden="true">#</a> 中原消费金融</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-3317ba70-8310-465c-b36d-60f8e215960c.png" alt=""></p><p>河南中原消费金融股份有限公司是一家全国性非银行金融机构，地址位于郑州市郑东新区。</p><p>中原消费金融的办公环境非常不错，薪资福利相对也还不错。</p><p>整体面试体验不错，效率也非常高，像技术面试的话一般是三轮或者四轮。不过，中原消费金融比较看重学历，985/211 上岸的几率比较大。</p><p>薪资的话，看准网上的平均薪资是 16k 附近，其中后端开发的薪资在 17k 附近，前端开发的薪资在 16k 附近，软件测试的薪资在 14k 附近(薪资水平仅供参考，实际情况因人和岗位或许会有一些出入，应该到不了这么高)。</p><p>注意：大家注意一个情况，中原消费的软件研发岗位大部分都搬迁到上海了，目前在郑州的大部分是行政岗位，只有少部分研发岗位。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-6de95df2-4c10-44af-9ddb-935cb358def6.png" alt=""></p><h3 id="刀锋互娱" tabindex="-1"><a class="header-anchor" href="#刀锋互娱" aria-hidden="true">#</a> 刀锋互娱</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-aa02294b-e809-49b6-9e96-4ec44db676c3.png" alt=""></p><p>刀锋互娱是一家专注游戏服务市场的互联网公司，2019 年完成 A+轮融资，平台注册用户量突破千万。</p><p>旗下比较出名的产品有租号玩、一派陪玩，都是和游戏领域相关的产品。相信比较喜欢玩游戏的小伙伴应该对这个两个产品有了解。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-ec100440-a50e-4f27-88e4-4b075cf12676.png" alt=""></p><p>整体面试不是很难，薪资相对来说也还可以。</p><p>薪资的话，看准网上的平均薪资是 16k 附近，其中后端开发（C++）的薪资在 20k 附近，前端开发的薪资在 8.5k 附近，软件测试的薪资在 9.5k 附近(薪资水平仅供参考，实际情况因人和岗位或许会有一些出入)。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-1b7640e6-deee-42f6-8df7-639555c5d236.png" alt=""></p><h3 id="新开普" tabindex="-1"><a class="header-anchor" href="#新开普" aria-hidden="true">#</a> 新开普</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-ca1cf626-13aa-4081-b6c0-285893458dde.png" alt=""></p><p>新开普也是郑州的一家本土互联网公司，成立于郑州高新技术产业开发区，主要做 NFC 近场移动支付、金融 IC 卡等业务。</p><p>新开普是目前国内一卡通行业唯一一家上市公司，已经为全国千所高校，千万名大学生提供服务。</p><p>技术面试的话，一般第一面是笔试，笔试之后会再问你一些相关的技术问题。</p><p>薪资的话，看准网上的平均薪资是 7.6k 附近，其中后端开发（Java）的薪资在 9k 附近，前端开发的薪资在 9k 附近，软件测试的薪资在 5.5k 附近(薪资水平仅供参考，实际情况因人和岗位或许会有一些出入)。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-dca4c23e-7310-4a60-b338-25f3e92d3339.png" alt=""></p><h3 id="中移在线" tabindex="-1"><a class="header-anchor" href="#中移在线" aria-hidden="true">#</a> 中移在线</h3><p>中国移动旗下的一家“互联网”公司，实际不像是“互联网”公司。</p><p>对于技术开发来说，去中移在线一是对技术没有提升或者挑战，二是工资是真的低（看准网上的 Java 开发薪资在 8k 附近）。</p><p>真心不太建议去，除非你没有其他更好的选择。</p><p>我能想到唯一的优势可能是公司相对来说能提供给你的一个相对稳定的工作。</p><h3 id="爱云校" tabindex="-1"><a class="header-anchor" href="#爱云校" aria-hidden="true">#</a> 爱云校</h3><p>爱云校常见于 2014 年，主要做的是在校教育这块，致力于通过 AI 建一所云上的学校。</p><p>单看公司所做的业务方向来说，发展相对来说还是不错的。不过，据说公司的管理真的是渣到了一定程度。</p><p>另外，根据大部分面试求职者的反馈来看，这家公司的整体面试体验比较差。</p><p>薪资的话，看准网上的平均薪资是 12k 附近，其中后端开发（Java）的薪资在 14k 附近，前端开发的薪资在 8k 附近，软件测试的薪资在 10k 附近(薪资水平仅供参考，实际情况因人和岗位或许会有一些出入)。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-90273777-d5d0-424a-a8b0-e5df53455ef9.png" alt=""></p><h3 id="妙优车" tabindex="-1"><a class="header-anchor" href="#妙优车" aria-hidden="true">#</a> 妙优车</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-b6ca12ab-ecb5-4b01-9cf3-21b22da0d67a.png" alt=""></p><p>妙优车主要做的是汽车方面的业务，涵盖整车销售、汽车金融、汽车保险、汽车用品、汽车美容等方面。</p><p>公司发展一般，网上也有一些黑历史(可以自己查一下)。</p><p>不过，根据大部分面试求职者的反馈来看，这家公司的整体面试体验还是可以的。</p><p>薪资这块的一般偏上，看准网上的平均薪资是 11k 附近，其中后端开发（Java）的薪资在 12k 附近，前端开发的薪资在 10k 附近(薪资水平仅供参考，实际情况因人和岗位或许会有一些出入)。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-491c2bc1-5cea-48e6-ad47-80eb92ddaa3d.png" alt=""></p><h3 id="腾河" tabindex="-1"><a class="header-anchor" href="#腾河" aria-hidden="true">#</a> 腾河</h3><p>腾讯是河南腾河网络科技有限公司的最大股东，第二大股东是河南日报。</p><p>主要做的业务方向是河南城市生活第一网。</p><p>工资比较低，另外，后端这块好像只招 PHP。</p><h3 id="真二网" tabindex="-1"><a class="header-anchor" href="#真二网" aria-hidden="true">#</a> 真二网</h3><p>不得不说，这个名字有点东西！</p><p>真二网创立于 2014 年，也是郑州本土的一家互联网公司，主要做 C2C 模式的 0 中介费真实二手房交易平台。</p><p>工资比较低，另外，后端这块好像只招 PHP。</p><h3 id="硕诺科技" tabindex="-1"><a class="header-anchor" href="#硕诺科技" aria-hidden="true">#</a> 硕诺科技</h3><p>硕诺科技创立于 2014 年，总部位于上海，主要做物流软件系统高端定制的软件开发。</p><p>网上可以查到的消息比较少，感兴趣的小伙伴可以自己去查一下相关信息啊！</p><p>另外，如果有小伙伴对这家公司比较了解，也可以在评论区说一下啊！</p><h3 id="科大讯飞" tabindex="-1"><a class="header-anchor" href="#科大讯飞" aria-hidden="true">#</a> 科大讯飞</h3><p>科大讯飞在郑州金水区有一个小分部，大部分招聘的都是和技术无关的岗位，不过也有一个 Java 开发岗。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-dc1517e7-c93b-457f-96d2-0871c17bf916.png" alt=""></p><h3 id="字节跳动" tabindex="-1"><a class="header-anchor" href="#字节跳动" aria-hidden="true">#</a> 字节跳动</h3><p>郑州也有字节跳动分部，不过都是和市场拓展与运营相关的岗位，像技术开发岗是没有的。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-c7d11e68-2b85-4895-a3c5-44f6816ccfb2.png" alt=""></p><p>类似的还有美团、华为、阿里巴巴等大厂，这些公司在郑州招聘的基本也都是非技术岗位。</p><h3 id="其他" tabindex="-1"><a class="header-anchor" href="#其他" aria-hidden="true">#</a> 其他</h3><p>其他还有像郑州点读电子科技有限公司（旗下产品有咿啦看书）、羲和网络（河南唯一一家游戏上市企业）、米宅（中国知名的楼市自媒体，新三板上市企业）等互联网公司，感兴趣的小伙伴可以自行查阅相关信息呀！</p><p>读者补充：海康威视、APUS、云鸟、亚信科技、牧原食品、小鱼易联、神州信息、云智慧都在郑州招开发工程师。</p><h2 id="生活环境-生活成本" tabindex="-1"><a class="header-anchor" href="#生活环境-生活成本" aria-hidden="true">#</a> 生活环境&amp;生活成本</h2><p>我们再来看看生活环境和生活成本。</p><h3 id="房价" tabindex="-1"><a class="header-anchor" href="#房价" aria-hidden="true">#</a> 房价</h3><p>郑州的房价对于其发展来说还是比较贵的。当然了，相比于一线城市肯定还是要便宜很多的！</p><p>以下房价数据来源于安居客，可以作为参考。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-95ec5784-5064-488c-bce8-4c076115a021.png" alt=""></p><h3 id="教育" tabindex="-1"><a class="header-anchor" href="#教育" aria-hidden="true">#</a> 教育</h3><p>郑州的教育资源极度匮乏！据统计郑州一共有 65 所高校，其中，本科 26 所，专科 39 所。</p><p>不过，211 院校仅有一所——郑州大学。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-03294872-3914-441b-ae6b-55200bce097a.png" alt=""></p><p>是的！作为偌大的河南省的省会，国家历史文化名城，也就只有一所 211！</p><p>我们来对比一下湖北省省会武汉，武汉 7 所 985/211 高校，分别是武汉大学、华中科技大学、中国地质大学、武汉理工大学、华中师范大学、华中农业大学、中南财经政法大学。</p><p>再来对比一下湖南省省会长沙，长沙有 4 所 985/211 高校，分别是国防科大、中南大学、湖南大学、湖南师范大学。</p><h3 id="医疗" tabindex="-1"><a class="header-anchor" href="#医疗" aria-hidden="true">#</a> 医疗</h3><p>郑州的每万人床位数排名比较靠前。</p><p>另外，郑州市的优质医疗资源，在金水区、中原区、管城区比较集中；</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-6bbd8d11-dbe5-43c4-9354-b422b7fe1f77.png" alt=""></p><h3 id="本地居民" tabindex="-1"><a class="header-anchor" href="#本地居民" aria-hidden="true">#</a> 本地居民</h3><p>网上有很多“河南黑”，让很多人对河南的影响不好！</p><p>实际情况可能并不是这样的！郑州本地居民不排外，绝大部分都特别老实，本本分分。</p><p>我去过很多城市，郑州人的友善程度我觉得是可以排在 Top 级别的！</p><p>另外，郑州这边的居民还是比较恋家的。有很多在北上广混的还不错的人，最后也还是选择回来！</p><h3 id="交通" tabindex="-1"><a class="header-anchor" href="#交通" aria-hidden="true">#</a> 交通</h3><p>作为一个北方内陆城市，郑州可以说是一个“交通枢纽”。从郑州出发坐高铁，你去国内大部分地方都非常方便。</p><p>下图中的部分高铁线路正在修建，比如郑万高铁全线大概是 2021 年中旬通车。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-0a4d6b3c-a756-4509-a6fd-f3a65f018c84.png" alt=""></p><p>郑州的地铁规划情况如下图所示。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-264ab1f2-f355-466a-ab5d-2dc21668e888.gif" alt=""></p><p>目前的话，郑州地铁有 1 号线、2 号线、3 号线、4 号线、城郊线、5 号线、14 号线一期 7 条地铁线。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-c5e61f03-efcb-4e56-b9bf-ff7bcec3dce0" alt=""></p><h3 id="美食" tabindex="-1"><a class="header-anchor" href="#美食" aria-hidden="true">#</a> 美食</h3><p>郑州的各种商业设施还是比较齐全的，有很多大型的商场，商场里面基本是样样俱全。</p><p>郑州好吃的还挺多的！去了郑州之后，一定要去喝胡辣汤，真的不要太好喝！</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-757eed5b-4b81-4bb0-a0e1-b24e510cc707.png" alt=""></p><p>本地的美食还有烩面、焖饼、烧鸡等等都非常不错。</p><p>巩义那边有一家花雕醉鸡真心不错，价格便宜，2 个人不到 100 元就能吃的很好！最关键的是味道真的好！！！</p><p>像浙菜、豫菜、火锅串串这边都能找到比较好吃的店子，可以满足绝大部分小伙伴的味蕾。</p><blockquote><p>作者：大白，转载链接：<a 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45.227 9.386 42.667 42.667 0 0 1 10.24 42.667 358.4 358.4 0 0 0 82.773 375.893 361.387 361.387 0 0 0 376.747 82.774 42.667 42.667 0 0 1 54.187 55.04 433.493 433.493 0 0 1-99.84 154.88 438.613 438.613 0 0 1-311.467 128z"></path></svg><svg xmlns="http://www.w3.org/2000/svg" class="icon light-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="light icon" style="display:none;"><path d="M952 552h-80a40 40 0 0 1 0-80h80a40 40 0 0 1 0 80zM801.88 280.08a41 41 0 0 1-57.96-57.96l57.96-58a41.04 41.04 0 0 1 58 58l-58 57.96zM512 752a240 240 0 1 1 0-480 240 240 0 0 1 0 480zm0-560a40 40 0 0 1-40-40V72a40 40 0 0 1 80 0v80a40 40 0 0 1-40 40zm-289.88 88.08-58-57.96a41.04 41.04 0 0 1 58-58l57.96 58a41 41 0 0 1-57.96 57.96zM192 512a40 40 0 0 1-40 40H72a40 40 0 0 1 0-80h80a40 40 0 0 1 40 40zm30.12 231.92a41 41 0 0 1 57.96 57.96l-57.96 58a41.04 41.04 0 0 1-58-58l58-57.96zM512 832a40 40 0 0 1 40 40v80a40 40 0 0 1-80 0v-80a40 40 0 0 1 40-40zm289.88-88.08 58 57.96a41.04 41.04 0 0 1-58 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clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">六、求职面试</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">面试题集合</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">背诵版八股文</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">城市选择</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/cityselect/beijing.html" class="nav-link sidebar-link sidebar-page" aria-label="北京"><!---->北京<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/chengdu.html" class="nav-link sidebar-link sidebar-page" aria-label="成都"><!---->成都<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/guangzhou.html" class="nav-link sidebar-link sidebar-page" aria-label="广州"><!---->广州<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/hangzhou.html" class="nav-link sidebar-link sidebar-page" aria-label="杭州"><!---->杭州<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/nanjing.html" class="nav-link sidebar-link sidebar-page" aria-label="南京"><!---->南京<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/qingdao.html" class="nav-link sidebar-link sidebar-page" aria-label="青岛"><!---->青岛<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/shenzhen.html" class="nav-link sidebar-link sidebar-page" aria-label="深圳"><!---->深圳<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/suzhou.html" class="nav-link sidebar-link sidebar-page" aria-label="苏州"><!---->苏州<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/cityselect/xian.html" class="nav-link sidebar-link sidebar-page" aria-label="西安"><!---->西安<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/cityselect/zhengzhou.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="郑州"><!---->郑州<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/zhengzhou.html#工作机会" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="工作机会"><!---->工作机会<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/zhengzhou.html#数字郑州" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="数字郑州"><!---->数字郑州<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/zhengzhou.html#中原银行" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="中原银行"><!---->中原银行<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/zhengzhou.html#浪潮" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="浪潮"><!---->浪潮<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/zhengzhou.html#新华三" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="新华三"><!---->新华三<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/zhengzhou.html#uu-跑腿" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="UU 跑腿"><!---->UU 跑腿<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/zhengzhou.html#中原消费金融" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="中原消费金融"><!---->中原消费金融<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/zhengzhou.html#刀锋互娱" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="刀锋互娱"><!---->刀锋互娱<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/zhengzhou.html#新开普" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="新开普"><!---->新开普<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/zhengzhou.html#中移在线" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="中移在线"><!---->中移在线<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/zhengzhou.html#爱云校" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="爱云校"><!---->爱云校<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/zhengzhou.html#妙优车" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="妙优车"><!---->妙优车<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/zhengzhou.html#腾河" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="腾河"><!---->腾河<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/zhengzhou.html#真二网" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="真二网"><!---->真二网<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/zhengzhou.html#硕诺科技" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="硕诺科技"><!---->硕诺科技<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/zhengzhou.html#科大讯飞" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="科大讯飞"><!---->科大讯飞<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/zhengzhou.html#字节跳动" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="字节跳动"><!---->字节跳动<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/zhengzhou.html#其他" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="其他"><!---->其他<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/zhengzhou.html#生活环境-生活成本" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="生活环境&amp;生活成本"><!---->生活环境&amp;生活成本<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/zhengzhou.html#房价" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="房价"><!---->房价<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/zhengzhou.html#教育" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="教育"><!---->教育<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/zhengzhou.html#医疗" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="医疗"><!---->医疗<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/zhengzhou.html#本地居民" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="本地居民"><!---->本地居民<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/zhengzhou.html#交通" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="交通"><!---->交通<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cityselect/zhengzhou.html#美食" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="美食"><!---->美食<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li></ul><!--]--></li><li><!--[--><a href="/cityselect/jinan.html" class="nav-link sidebar-link sidebar-page" aria-label="济南"><!---->济南<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->郑州都有哪些值得加入的IT互联网公司？</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月27日</span><meta property="datePublished" content="2022-03-27T08:36:50.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category4" role>求职面试</li><meta property="articleSection" content="求职面试"></ul></span><span aria-label="标签🏷" 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id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/zhengzhou.html#工作机会" class="router-link-active router-link-exact-active toc-link level2">工作机会</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/zhengzhou.html#数字郑州" class="router-link-active router-link-exact-active toc-link level3">数字郑州</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/zhengzhou.html#中原银行" class="router-link-active router-link-exact-active toc-link level3">中原银行</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/zhengzhou.html#浪潮" class="router-link-active router-link-exact-active toc-link level3">浪潮</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/zhengzhou.html#新华三" class="router-link-active router-link-exact-active toc-link level3">新华三</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/zhengzhou.html#uu-跑腿" class="router-link-active router-link-exact-active toc-link level3">UU 跑腿</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/zhengzhou.html#中原消费金融" class="router-link-active router-link-exact-active toc-link level3">中原消费金融</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/zhengzhou.html#刀锋互娱" class="router-link-active router-link-exact-active toc-link level3">刀锋互娱</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/zhengzhou.html#新开普" class="router-link-active router-link-exact-active toc-link level3">新开普</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/zhengzhou.html#中移在线" class="router-link-active router-link-exact-active toc-link level3">中移在线</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/zhengzhou.html#爱云校" class="router-link-active router-link-exact-active toc-link level3">爱云校</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/zhengzhou.html#妙优车" class="router-link-active router-link-exact-active toc-link level3">妙优车</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/zhengzhou.html#腾河" class="router-link-active router-link-exact-active toc-link level3">腾河</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/zhengzhou.html#真二网" class="router-link-active router-link-exact-active toc-link level3">真二网</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/zhengzhou.html#硕诺科技" class="router-link-active router-link-exact-active toc-link level3">硕诺科技</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/zhengzhou.html#科大讯飞" class="router-link-active router-link-exact-active toc-link level3">科大讯飞</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/zhengzhou.html#字节跳动" class="router-link-active router-link-exact-active toc-link level3">字节跳动</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/zhengzhou.html#其他" class="router-link-active router-link-exact-active toc-link level3">其他</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/zhengzhou.html#生活环境-生活成本" class="router-link-active router-link-exact-active toc-link level2">生活环境&amp;生活成本</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/zhengzhou.html#房价" class="router-link-active router-link-exact-active toc-link level3">房价</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/zhengzhou.html#教育" class="router-link-active router-link-exact-active toc-link level3">教育</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/zhengzhou.html#医疗" class="router-link-active router-link-exact-active toc-link level3">医疗</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/zhengzhou.html#本地居民" class="router-link-active router-link-exact-active toc-link level3">本地居民</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/zhengzhou.html#交通" class="router-link-active router-link-exact-active toc-link level3">交通</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cityselect/zhengzhou.html#美食" class="router-link-active router-link-exact-active toc-link level3">美食</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="郑州都有哪些值得加入的it互联网公司" tabindex="-1"><a class="header-anchor" href="#郑州都有哪些值得加入的it互联网公司" aria-hidden="true">#</a> 郑州都有哪些值得加入的IT互联网公司？</h1><p>首先我们来看工作机会！</p><p>一位读者的评论我觉得特别的好，我贴到这里给大家看下：</p><p>网名&quot;咔嚓&quot;：作为在郑州工作的前端，表示遇见好厂的话，生活节奏还是很爽的，房租不贵，直接住公司旁边，通勤5分钟，不加班的话，每天晚上6点下班，双休。确实郑州互联网不强，但是，我们也不应该忘了生活本该有的样子啊。</p><h2 id="工作机会" tabindex="-1"><a class="header-anchor" href="#工作机会" aria-hidden="true">#</a> 工作机会</h2><p>郑州的互联网资源还是比较匮乏的，究其原因，我觉得和教育资源的匮乏有非常大的关系。</p><p>教育资源极度匮乏导致好的企业不来，好的企业不来又导致人才外流，恶性循环。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-0cd5c4ac-4e67-4b06-b5a3-20fad836824b.png" alt=""></p><h3 id="数字郑州" tabindex="-1"><a class="header-anchor" href="#数字郑州" aria-hidden="true">#</a> 数字郑州</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-b88e7ee0-5ab7-40af-8d1d-16cd3eae7b97.png" alt="img"></p><p>这个是阿里和郑州的政府合作的，目前评价大家对数字郑州的评价很不错呀，薪资也挺给力的，大家可以看下 Boss 上数字郑州的招聘岗位以及薪资报价呀。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-b1ef6dc9-0859-47fd-9058-a504bf01cd5a.png" alt=""></p><h3 id="中原银行" tabindex="-1"><a class="header-anchor" href="#中原银行" aria-hidden="true">#</a> 中原银行</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-db7b6919-2158-4846-914f-f30e028c0234.png" alt="img"></p><p>中原银行的工资比较高，在郑州生活的话去中原银行是很不错的选择，不过想进中原银行的话，不是校招想进去有点难。薪资水平可以看下 Boss 上的招聘薪资水平。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-ce9e2a6e-8743-49b3-83aa-8719da78b7e1.png" alt=""></p><h3 id="浪潮" tabindex="-1"><a class="header-anchor" href="#浪潮" aria-hidden="true">#</a> 浪潮</h3><p>浪潮在郑州的研发中心法定节假日加班是有加班费的，但平时加班就没有加班费了，每月要求加够50个小时的班。薪资水平大家也可以参考下 Boss 上放出的招聘薪资水平。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-ef0fe9a0-eff2-4037-96d2-ab84a2f76491.png" alt=""></p><h3 id="新华三" tabindex="-1"><a class="header-anchor" href="#新华三" aria-hidden="true">#</a> 新华三</h3><p>新华三大部分情况下能双休，周末加班也有加班费，不过涨薪很缓慢。在网上看到一个帖子，有人问 offer 选西安中兴还算郑州新华三，中兴和华三的职工都在互相劝退，说这是一个送命题。薪资水平大家还是参考下Boss上的招聘薪资水平吧。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-caa46657-f65d-4965-b553-c9f4502f3cc9.png" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-62496f27-fe20-45c6-b116-90a38e607a09.jpg" alt="点击并拖拽以移动"></p><h3 id="uu-跑腿" tabindex="-1"><a class="header-anchor" href="#uu-跑腿" aria-hidden="true">#</a> UU 跑腿</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-624dd61d-2b19-4cb6-b4b6-e1b813fd6baf.png" alt=""></p><p>UU 跑腿主要提供同城送件服务，是郑州本土最大的互联网公司，隶属于郑州时空隧道信息技术有限公司，地址位于郑州市金水区。</p><p>UU 跑腿的工作环境以及各种福利都还算不错！</p><p>面试的话，总体体验还不错，技术面试一般问的还比较全面。拿 Java 后端开发来说，像 SQL 优化、分布式、缓存这些一般都会问到。</p><p>薪资的话，看准网上的平均薪资是 10k 附近，其中后端开发的薪资在 14k 附近，前端开发的薪资在 10k 附近，软件测试的薪资在 10k 附近(薪资水平仅供参考，实际情况因人和岗位或许会有一些出入)。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-b3a5d176-a10b-4637-a349-06197ee984a8.png" alt=""></p><h3 id="中原消费金融" tabindex="-1"><a class="header-anchor" href="#中原消费金融" aria-hidden="true">#</a> 中原消费金融</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-3317ba70-8310-465c-b36d-60f8e215960c.png" alt=""></p><p>河南中原消费金融股份有限公司是一家全国性非银行金融机构，地址位于郑州市郑东新区。</p><p>中原消费金融的办公环境非常不错，薪资福利相对也还不错。</p><p>整体面试体验不错，效率也非常高，像技术面试的话一般是三轮或者四轮。不过，中原消费金融比较看重学历，985/211 上岸的几率比较大。</p><p>薪资的话，看准网上的平均薪资是 16k 附近，其中后端开发的薪资在 17k 附近，前端开发的薪资在 16k 附近，软件测试的薪资在 14k 附近(薪资水平仅供参考，实际情况因人和岗位或许会有一些出入，应该到不了这么高)。</p><p>注意：大家注意一个情况，中原消费的软件研发岗位大部分都搬迁到上海了，目前在郑州的大部分是行政岗位，只有少部分研发岗位。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-6de95df2-4c10-44af-9ddb-935cb358def6.png" alt=""></p><h3 id="刀锋互娱" tabindex="-1"><a class="header-anchor" href="#刀锋互娱" aria-hidden="true">#</a> 刀锋互娱</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-aa02294b-e809-49b6-9e96-4ec44db676c3.png" alt=""></p><p>刀锋互娱是一家专注游戏服务市场的互联网公司，2019 年完成 A+轮融资，平台注册用户量突破千万。</p><p>旗下比较出名的产品有租号玩、一派陪玩，都是和游戏领域相关的产品。相信比较喜欢玩游戏的小伙伴应该对这个两个产品有了解。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-ec100440-a50e-4f27-88e4-4b075cf12676.png" alt=""></p><p>整体面试不是很难，薪资相对来说也还可以。</p><p>薪资的话，看准网上的平均薪资是 16k 附近，其中后端开发（C++）的薪资在 20k 附近，前端开发的薪资在 8.5k 附近，软件测试的薪资在 9.5k 附近(薪资水平仅供参考，实际情况因人和岗位或许会有一些出入)。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-1b7640e6-deee-42f6-8df7-639555c5d236.png" alt=""></p><h3 id="新开普" tabindex="-1"><a class="header-anchor" href="#新开普" aria-hidden="true">#</a> 新开普</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-ca1cf626-13aa-4081-b6c0-285893458dde.png" alt=""></p><p>新开普也是郑州的一家本土互联网公司，成立于郑州高新技术产业开发区，主要做 NFC 近场移动支付、金融 IC 卡等业务。</p><p>新开普是目前国内一卡通行业唯一一家上市公司，已经为全国千所高校，千万名大学生提供服务。</p><p>技术面试的话，一般第一面是笔试，笔试之后会再问你一些相关的技术问题。</p><p>薪资的话，看准网上的平均薪资是 7.6k 附近，其中后端开发（Java）的薪资在 9k 附近，前端开发的薪资在 9k 附近，软件测试的薪资在 5.5k 附近(薪资水平仅供参考，实际情况因人和岗位或许会有一些出入)。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-dca4c23e-7310-4a60-b338-25f3e92d3339.png" alt=""></p><h3 id="中移在线" tabindex="-1"><a class="header-anchor" href="#中移在线" aria-hidden="true">#</a> 中移在线</h3><p>中国移动旗下的一家“互联网”公司，实际不像是“互联网”公司。</p><p>对于技术开发来说，去中移在线一是对技术没有提升或者挑战，二是工资是真的低（看准网上的 Java 开发薪资在 8k 附近）。</p><p>真心不太建议去，除非你没有其他更好的选择。</p><p>我能想到唯一的优势可能是公司相对来说能提供给你的一个相对稳定的工作。</p><h3 id="爱云校" tabindex="-1"><a class="header-anchor" href="#爱云校" aria-hidden="true">#</a> 爱云校</h3><p>爱云校常见于 2014 年，主要做的是在校教育这块，致力于通过 AI 建一所云上的学校。</p><p>单看公司所做的业务方向来说，发展相对来说还是不错的。不过，据说公司的管理真的是渣到了一定程度。</p><p>另外，根据大部分面试求职者的反馈来看，这家公司的整体面试体验比较差。</p><p>薪资的话，看准网上的平均薪资是 12k 附近，其中后端开发（Java）的薪资在 14k 附近，前端开发的薪资在 8k 附近，软件测试的薪资在 10k 附近(薪资水平仅供参考，实际情况因人和岗位或许会有一些出入)。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-90273777-d5d0-424a-a8b0-e5df53455ef9.png" alt=""></p><h3 id="妙优车" tabindex="-1"><a class="header-anchor" href="#妙优车" aria-hidden="true">#</a> 妙优车</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-b6ca12ab-ecb5-4b01-9cf3-21b22da0d67a.png" alt=""></p><p>妙优车主要做的是汽车方面的业务，涵盖整车销售、汽车金融、汽车保险、汽车用品、汽车美容等方面。</p><p>公司发展一般，网上也有一些黑历史(可以自己查一下)。</p><p>不过，根据大部分面试求职者的反馈来看，这家公司的整体面试体验还是可以的。</p><p>薪资这块的一般偏上，看准网上的平均薪资是 11k 附近，其中后端开发（Java）的薪资在 12k 附近，前端开发的薪资在 10k 附近(薪资水平仅供参考，实际情况因人和岗位或许会有一些出入)。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-491c2bc1-5cea-48e6-ad47-80eb92ddaa3d.png" alt=""></p><h3 id="腾河" tabindex="-1"><a class="header-anchor" href="#腾河" aria-hidden="true">#</a> 腾河</h3><p>腾讯是河南腾河网络科技有限公司的最大股东，第二大股东是河南日报。</p><p>主要做的业务方向是河南城市生活第一网。</p><p>工资比较低，另外，后端这块好像只招 PHP。</p><h3 id="真二网" tabindex="-1"><a class="header-anchor" href="#真二网" aria-hidden="true">#</a> 真二网</h3><p>不得不说，这个名字有点东西！</p><p>真二网创立于 2014 年，也是郑州本土的一家互联网公司，主要做 C2C 模式的 0 中介费真实二手房交易平台。</p><p>工资比较低，另外，后端这块好像只招 PHP。</p><h3 id="硕诺科技" tabindex="-1"><a class="header-anchor" href="#硕诺科技" aria-hidden="true">#</a> 硕诺科技</h3><p>硕诺科技创立于 2014 年，总部位于上海，主要做物流软件系统高端定制的软件开发。</p><p>网上可以查到的消息比较少，感兴趣的小伙伴可以自己去查一下相关信息啊！</p><p>另外，如果有小伙伴对这家公司比较了解，也可以在评论区说一下啊！</p><h3 id="科大讯飞" tabindex="-1"><a class="header-anchor" href="#科大讯飞" aria-hidden="true">#</a> 科大讯飞</h3><p>科大讯飞在郑州金水区有一个小分部，大部分招聘的都是和技术无关的岗位，不过也有一个 Java 开发岗。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-dc1517e7-c93b-457f-96d2-0871c17bf916.png" alt=""></p><h3 id="字节跳动" tabindex="-1"><a class="header-anchor" href="#字节跳动" aria-hidden="true">#</a> 字节跳动</h3><p>郑州也有字节跳动分部，不过都是和市场拓展与运营相关的岗位，像技术开发岗是没有的。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-c7d11e68-2b85-4895-a3c5-44f6816ccfb2.png" alt=""></p><p>类似的还有美团、华为、阿里巴巴等大厂，这些公司在郑州招聘的基本也都是非技术岗位。</p><h3 id="其他" tabindex="-1"><a class="header-anchor" href="#其他" aria-hidden="true">#</a> 其他</h3><p>其他还有像郑州点读电子科技有限公司（旗下产品有咿啦看书）、羲和网络（河南唯一一家游戏上市企业）、米宅（中国知名的楼市自媒体，新三板上市企业）等互联网公司，感兴趣的小伙伴可以自行查阅相关信息呀！</p><p>读者补充：海康威视、APUS、云鸟、亚信科技、牧原食品、小鱼易联、神州信息、云智慧都在郑州招开发工程师。</p><h2 id="生活环境-生活成本" tabindex="-1"><a class="header-anchor" href="#生活环境-生活成本" aria-hidden="true">#</a> 生活环境&amp;生活成本</h2><p>我们再来看看生活环境和生活成本。</p><h3 id="房价" tabindex="-1"><a class="header-anchor" href="#房价" aria-hidden="true">#</a> 房价</h3><p>郑州的房价对于其发展来说还是比较贵的。当然了，相比于一线城市肯定还是要便宜很多的！</p><p>以下房价数据来源于安居客，可以作为参考。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-95ec5784-5064-488c-bce8-4c076115a021.png" alt=""></p><h3 id="教育" tabindex="-1"><a class="header-anchor" href="#教育" aria-hidden="true">#</a> 教育</h3><p>郑州的教育资源极度匮乏！据统计郑州一共有 65 所高校，其中，本科 26 所，专科 39 所。</p><p>不过，211 院校仅有一所——郑州大学。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-03294872-3914-441b-ae6b-55200bce097a.png" alt=""></p><p>是的！作为偌大的河南省的省会，国家历史文化名城，也就只有一所 211！</p><p>我们来对比一下湖北省省会武汉，武汉 7 所 985/211 高校，分别是武汉大学、华中科技大学、中国地质大学、武汉理工大学、华中师范大学、华中农业大学、中南财经政法大学。</p><p>再来对比一下湖南省省会长沙，长沙有 4 所 985/211 高校，分别是国防科大、中南大学、湖南大学、湖南师范大学。</p><h3 id="医疗" tabindex="-1"><a class="header-anchor" href="#医疗" aria-hidden="true">#</a> 医疗</h3><p>郑州的每万人床位数排名比较靠前。</p><p>另外，郑州市的优质医疗资源，在金水区、中原区、管城区比较集中；</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-6bbd8d11-dbe5-43c4-9354-b422b7fe1f77.png" alt=""></p><h3 id="本地居民" tabindex="-1"><a class="header-anchor" href="#本地居民" aria-hidden="true">#</a> 本地居民</h3><p>网上有很多“河南黑”，让很多人对河南的影响不好！</p><p>实际情况可能并不是这样的！郑州本地居民不排外，绝大部分都特别老实，本本分分。</p><p>我去过很多城市，郑州人的友善程度我觉得是可以排在 Top 级别的！</p><p>另外，郑州这边的居民还是比较恋家的。有很多在北上广混的还不错的人，最后也还是选择回来！</p><h3 id="交通" tabindex="-1"><a class="header-anchor" href="#交通" aria-hidden="true">#</a> 交通</h3><p>作为一个北方内陆城市，郑州可以说是一个“交通枢纽”。从郑州出发坐高铁，你去国内大部分地方都非常方便。</p><p>下图中的部分高铁线路正在修建，比如郑万高铁全线大概是 2021 年中旬通车。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-0a4d6b3c-a756-4509-a6fd-f3a65f018c84.png" alt=""></p><p>郑州的地铁规划情况如下图所示。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-264ab1f2-f355-466a-ab5d-2dc21668e888.gif" alt=""></p><p>目前的话，郑州地铁有 1 号线、2 号线、3 号线、4 号线、城郊线、5 号线、14 号线一期 7 条地铁线。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-c5e61f03-efcb-4e56-b9bf-ff7bcec3dce0" alt=""></p><h3 id="美食" tabindex="-1"><a class="header-anchor" href="#美食" aria-hidden="true">#</a> 美食</h3><p>郑州的各种商业设施还是比较齐全的，有很多大型的商场，商场里面基本是样样俱全。</p><p>郑州好吃的还挺多的！去了郑州之后，一定要去喝胡辣汤，真的不要太好喝！</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cityselect/zhengzhou-757eed5b-4b81-4bb0-a0e1-b24e510cc707.png" alt=""></p><p>本地的美食还有烩面、焖饼、烧鸡等等都非常不错。</p><p>巩义那边有一家花雕醉鸡真心不错，价格便宜，2 个人不到 100 元就能吃的很好！最关键的是味道真的好！！！</p><p>像浙菜、豫菜、火锅串串这边都能找到比较好吃的店子，可以满足绝大部分小伙伴的味蕾。</p><blockquote><p>作者：大白，转载链接：<a href="https://mp.weixin.qq.com/s/SU9drg2xJKcheIwJ6OSSBQ" target="_blank" rel="noopener noreferrer">https://mp.weixin.qq.com/s/SU9drg2xJKcheIwJ6OSSBQ<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item 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class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java集合ArrayList详解</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 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15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 11 分钟</span><meta property="timeRequired" content="PT11M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="java集合arraylist详解" tabindex="-1"><a class="header-anchor" href="#java集合arraylist详解" aria-hidden="true">#</a> Java集合ArrayList详解</h1><p>“二哥，听说今天我们开讲 ArrayList 了？好期待哦！”三妹明知故问，这个托配合得依然天衣无缝。</p><p>“是的呀，三妹。”我肯定地点了点头，继续说道，“ArrayList 可以称得上是集合框架方面最常用的类了，可以和 HashMap 一较高下。”</p><p>从名字就可以看得出来，ArrayList 实现了 List 接口，并且是基于数组实现的。</p><p>数组的大小是固定的，一旦创建的时候指定了大小，就不能再调整了。也就是说，如果数组满了，就不能再添加任何元素了。ArrayList 在数组的基础上实现了自动扩容，并且提供了比数组更丰富的预定义方法（各种增删改查），非常灵活。</p><p>Java 这门编程语言和 C语言的不同之处就在这里，如果是 C语言的话，就必须动手实现自己的 ArrayList，原生的库函数里面是没有的。</p><p>“二哥，<strong>如何创建一个 ArrayList 啊</strong>？”三妹问。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">ArrayList</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">String</span><span class="token punctuation">&gt;</span></span> alist <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">ArrayList</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">String</span><span class="token punctuation">&gt;</span></span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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class="nav-link sidebar-link sidebar-page" aria-label="概述"><!---->概述<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/collection/arraylist.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="ArrayList"><!---->ArrayList<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/collection/linkedlist.html" class="nav-link sidebar-link sidebar-page" aria-label="LinkedList"><!---->LinkedList<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/collection/list-war-2.html" class="nav-link sidebar-link sidebar-page" aria-label="ArrayList和LinkedList的区别"><!---->ArrayList和LinkedList的区别<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/collection/iterator-iterable.html" class="nav-link sidebar-link sidebar-page" aria-label="Iterator和Iterable"><!---->Iterator和Iterable<!----></a><ul 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class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java集合ArrayList详解</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 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00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2021年9月1日</span><meta property="datePublished" content="2021-09-01T05:45:40.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><meta property="articleSection" content="Java核心"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 11 分钟</span><meta property="timeRequired" content="PT11M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="java集合arraylist详解" tabindex="-1"><a class="header-anchor" href="#java集合arraylist详解" aria-hidden="true">#</a> Java集合ArrayList详解</h1><p>“二哥，听说今天我们开讲 ArrayList 了？好期待哦！”三妹明知故问，这个托配合得依然天衣无缝。</p><p>“是的呀，三妹。”我肯定地点了点头，继续说道，“ArrayList 可以称得上是集合框架方面最常用的类了，可以和 HashMap 一较高下。”</p><p>从名字就可以看得出来，ArrayList 实现了 List 接口，并且是基于数组实现的。</p><p>数组的大小是固定的，一旦创建的时候指定了大小，就不能再调整了。也就是说，如果数组满了，就不能再添加任何元素了。ArrayList 在数组的基础上实现了自动扩容，并且提供了比数组更丰富的预定义方法（各种增删改查），非常灵活。</p><p>Java 这门编程语言和 C语言的不同之处就在这里，如果是 C语言的话，就必须动手实现自己的 ArrayList，原生的库函数里面是没有的。</p><p>“二哥，<strong>如何创建一个 ArrayList 啊</strong>？”三妹问。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">ArrayList</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">String</span><span class="token punctuation">&gt;</span></span> alist <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">ArrayList</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">String</span><span class="token punctuation">&gt;</span></span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>可以通过上面的语句来创建一个字符串类型的 ArrayList（通过尖括号来限定 ArrayList 中元素的类型，如果尝试添加其他类型的元素，将会产生编译错误），更简化的写法如下：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">List</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">String</span><span class="token punctuation">&gt;</span></span> alist <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">ArrayList</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token punctuation">&gt;</span></span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>由于 ArrayList 实现了 List 接口，所以 alist 变量的类型可以是 List 类型；new 关键字声明后的尖括号中可以不再指定元素的类型，因为编译器可以通过前面尖括号中的类型进行智能推断。</p><p>如果非常确定 ArrayList 中元素的个数，在创建的时候还可以指定初始大小。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">List</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">String</span><span class="token punctuation">&gt;</span></span> alist <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">ArrayList</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token punctuation">&gt;</span></span><span class="token punctuation">(</span><span class="token number">20</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>这样做的好处是，可以有效地避免在添加新的元素时进行不必要的扩容。但通常情况下，我们很难确定 ArrayList 中元素的个数，因此一般不指定初始大小。</p><p>“二哥，<strong>那怎么向 ArrayList 中添加一个元素呢</strong>？”三妹继续问。</p><p>可以通过 <code>add()</code> 方法向 ArrayList 中添加一个元素，如果不指定下标的话，就默认添加在末尾。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code>alist<span class="token punctuation">.</span><span class="token function">add</span><span class="token punctuation">(</span><span class="token string">&quot;沉默王二&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
@@ -186,6 +186,6 @@ copy<span class="token punctuation">.</span><span class="token function">add</sp
     <span class="token keyword">return</span> <span class="token function">elementData</span><span class="token punctuation">(</span>index<span class="token punctuation">)</span><span class="token punctuation">;</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>2）默认添加一个元素（调用 <code>add()</code> 方法时）的时间复杂度为 O(1)，因为是直接添加到数组末尾的，但需要考虑到数组扩容时消耗的时间。</p><p>3）删除一个元素（调用 <code>remove(Object)</code> 方法时）的时间复杂度为 O(n)，因为要遍历列表，数据量增大几倍，耗时也增大几倍；如果是通过下标删除元素时，要考虑到数组的移动和复制所消耗的时间。</p><p>4）查找一个未排序的列表时间复杂度为 O(n)（调用 <code>indexOf()</code> 或者 <code>lastIndexOf()</code> 方法时），因为要遍历列表；查找排序过的列表时间复杂度为 O(log n)，因为可以使用二分查找法，当数据增大 n 倍时，耗时增大 logn 倍（这里的 log 是以 2 为底的，每找一次排除一半的可能）。</p><hr><p>ArrayList，如果有个中文名的话，应该叫动态数组，也就是可增长的数组，可调整大小的数组。动态数组克服了静态数组的限制，静态数组的容量是固定的，只能在首次创建的时候指定。而动态数组会随着元素的增加自动调整大小，更符合实际的开发需求。</p><p>学习集合框架，ArrayList 是第一课，也是新手进阶的重要一课。要想完全掌握 ArrayList，扩容这个机制是必须得掌握，也是面试中经常考察的一个点。</p><p>要想掌握扩容机制，就必须得读源码，也就肯定会遇到 <code>oldCapacity &gt;&gt; 1</code>，有些初学者会选择跳过，虽然不影响整体上的学习，但也错过了一个精进的机会。</p><p>计算机内部是如何表示十进制数的，右移时又发生了什么，静下心来去研究一下，你就会发现，哦，原来这么有趣呢？</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/collection/arraylist.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/14 上午7:14:28</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/collection/gailan.html" class="nav-link prev" aria-label="概述"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->概述</div></a><a href="/collection/linkedlist.html" class="nav-link next" aria-label="LinkedList"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">LinkedList<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 5 分钟</span><meta property="timeRequired" content="PT5M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="为什么阿里巴巴强制不要在foreach里执行删除操作" tabindex="-1"><a class="header-anchor" href="#为什么阿里巴巴强制不要在foreach里执行删除操作" aria-hidden="true">#</a> 为什么阿里巴巴强制不要在foreach里执行删除操作</h1><p>那天，小二去阿里面试，面试官老王一上来就甩给了他一道面试题：为什么阿里的 Java 开发手册里会强制不要在 foreach 里进行元素的删除操作？</p><hr><p>为了镇楼，先搬一段英文来解释一下 fail-fast。</p><blockquote><p>In systems design, a fail-fast system is one which immediately reports at its interface any condition that is likely to indicate a failure. Fail-fast systems are usually designed to stop normal operation rather than attempt to continue a possibly flawed process. Such designs often check the system&#39;s state at several points in an operation, so any failures can be detected early. The responsibility of a fail-fast module is detecting errors, then letting the next-highest level of the system handle them.</p></blockquote><p>这段话的大致意思就是，fail-fast 是一种通用的系统设计思想，一旦检测到可能会发生错误，就立马抛出异常，程序将不再往下执行。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">test</span><span class="token punctuation">(</span><span class="token class-name">Wanger</span> wanger<span class="token punctuation">)</span> <span class="token punctuation">{</span>   
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为什么阿里巴巴强制不要在foreach里执行删除操作</h1><p>那天，小二去阿里面试，面试官老王一上来就甩给了他一道面试题：为什么阿里的 Java 开发手册里会强制不要在 foreach 里进行元素的删除操作？</p><hr><p>为了镇楼，先搬一段英文来解释一下 fail-fast。</p><blockquote><p>In systems design, a fail-fast system is one which immediately reports at its interface any condition that is likely to indicate a failure. Fail-fast systems are usually designed to stop normal operation rather than attempt to continue a possibly flawed process. Such designs often check the system&#39;s state at several points in an operation, so any failures can be detected early. The responsibility of a fail-fast module is detecting errors, then letting the next-highest level of the system handle them.</p></blockquote><p>这段话的大致意思就是，fail-fast 是一种通用的系统设计思想，一旦检测到可能会发生错误，就立马抛出异常，程序将不再往下执行。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">test</span><span class="token punctuation">(</span><span class="token class-name">Wanger</span> wanger<span class="token punctuation">)</span> <span class="token punctuation">{</span>   
     <span class="token keyword">if</span> <span class="token punctuation">(</span>wanger <span class="token operator">==</span> <span class="token keyword">null</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
         <span class="token keyword">throw</span> <span class="token keyword">new</span> <span class="token class-name">RuntimeException</span><span class="token punctuation">(</span><span class="token string">&quot;wanger 不能为空&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
     <span class="token punctuation">}</span>
@@ -161,6 +161,6 @@ list<span class="token punctuation">.</span><span class="token function">add</sp
     <span class="token punctuation">}</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>删除完会执行 <code>expectedModCount = modCount</code>，保证了 expectedModCount 与 modCount 的同步。</p><hr><p>简单地总结一下，fail-fast 是一种保护机制，可以通过 for-each 循环删除集合的元素的方式验证这种保护机制。</p><p>那也就是说，for-each 本质上是一种语法糖，遍历集合时很方面，但并不适合拿来操作集合中的元素（增删）。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/collection/fail-fast.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/14 上午7:14:28</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/collection/iterator-iterable.html" class="nav-link prev" aria-label="Iterator和Iterable"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->Iterator和Iterable</div></a><a href="/collection/hashmap.html" class="nav-link next" aria-label="HashMap"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">HashMap<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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 </html>
diff --git a/dist/collection/gailan.html b/dist/collection/gailan.html
index 3904a88b..67d89d89 100644
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+++ b/dist/collection/gailan.html
@@ -39,10 +39,10 @@
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     <link rel="stylesheet" href="/assets/style.aa7884a9.css">
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aria-label="ArrayList"><!---->ArrayList<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/collection/linkedlist.html" class="nav-link sidebar-link sidebar-page" aria-label="LinkedList"><!---->LinkedList<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/collection/list-war-2.html" class="nav-link sidebar-link sidebar-page" aria-label="ArrayList和LinkedList的区别"><!---->ArrayList和LinkedList的区别<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/collection/iterator-iterable.html" class="nav-link sidebar-link sidebar-page" aria-label="Iterator和Iterable"><!---->Iterator和Iterable<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/collection/fail-fast.html" class="nav-link sidebar-link sidebar-page" aria-label="fail-fast"><!---->fail-fast<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/collection/hashmap.html" class="nav-link sidebar-link sidebar-page" aria-label="HashMap"><!---->HashMap<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.6 IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.11 并发编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java集合框架</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 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0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><meta property="articleSection" content="Java核心"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 10 分钟</span><meta property="timeRequired" content="PT10M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/collection/gailan.html#_01、list" class="router-link-active router-link-exact-active toc-link level3">01、List</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/collection/gailan.html#_02、set" class="router-link-active router-link-exact-active toc-link level3">02、Set</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/collection/gailan.html#_03、queue" class="router-link-active router-link-exact-active toc-link level3">03、Queue</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/collection/gailan.html#_04、map" class="router-link-active router-link-exact-active toc-link level3">04、Map</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/collection/gailan.html#_05、时间复杂度" class="router-link-active router-link-exact-active toc-link level3">05、时间复杂度</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="java集合框架" tabindex="-1"><a class="header-anchor" href="#java集合框架" aria-hidden="true">#</a> Java集合框架</h1><p>眼瞅着三妹的王者荣耀杀得正嗨，我趁机喊到：“别打了，三妹，我们来一起学习 Java 的集合框架吧。”</p><p>“才不要呢，等我打完这一局啊。”三妹倔强地说。</p><p>“好吧。”我只好摊摊手地说，“那我先画张集合框架的结构图等着你。”</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/collection/gailan-01.png" alt=""></p><p>“完了没？三妹。”</p><p>“完了好一会儿了，二哥，你图画得真慢，让我瞧瞧怎么样？”</p><p>“害，图要画得清晰明了，不容易的。三妹，你瞧，不错吧。”</p><p>Java 集合框架可以分为两条大的支线：</p><ul><li>Collection，主要由 List、Set、Queue 组成，List 代表有序、可重复的集合，典型代表就是封装了动态数组的 ArrayList 和封装了链表的 LinkedList；Set 代表无序、不可重复的集合，典型代表就是 HashSet 和 TreeSet；Queue 代表队列，典型代表就是双端队列 ArrayDeque，以及优先级队列 PriorityQue。</li><li>Map，代表键值对的集合，典型代表就是 HashMap。</li></ul><p>“接下来，我们再来过一遍。”</p><h3 id="_01、list" tabindex="-1"><a class="header-anchor" href="#_01、list" aria-hidden="true">#</a> 01、List</h3><blockquote><p>List 的特点是存取有序，可以存放重复的元素，可以用下标对元素进行操作</p></blockquote><p><strong>1）ArrayList</strong></p><ul><li>ArrayList 是由数组实现的，支持随机存取，也就是可以通过下标直接存取元素；</li><li>从尾部插入和删除元素会比较快捷，从中间插入和删除元素会比较低效，因为涉及到数组元素的复制和移动；</li><li>如果内部数组的容量不足时会自动扩容，因此当元素非常庞大的时候，效率会比较低。</li></ul><p><strong>2）LinkedList</strong></p><ul><li>LinkedList 是由双向链表实现的，不支持随机存取，只能从一端开始遍历，直到找到需要的元素后返回；</li><li>任意位置插入和删除元素都很方便，因为只需要改变前一个节点和后一个节点的引用即可，不像 ArrayList 那样需要复制和移动数组元素；</li><li>因为每个元素都存储了前一个和后一个节点的引用，所以相对来说，占用的内存空间会比 ArrayList 多一些。</li></ul><p><strong>3）Vector 和 Stack</strong></p><p>List 的实现类还有一个 Vector，是一个元老级的类，比 ArrayList 出现得更早。ArrayList 和 Vector 非常相似，只不过 Vector 是线程安全的，像 get、set、add 这些方法都加了 <code>synchronized</code> 关键字，就导致执行执行效率会比较低，所以现在已经很少用了。</p><p>更好的选择是并发包下的 CopyOnWriteArrayList。</p><p>Stack 是 Vector 的一个子类，本质上也是由动态数组实现的，只不过还实现了先进后出的功能（在 get、set、add 方法的基础上追加了 pop、peek 等方法），所以叫栈。</p><p>不过，由于 Stack 执行效率比较低（方法上同样加了 synchronized 关键字），就被双端队列 ArrayDeque 取代了。</p><h3 id="_02、set" tabindex="-1"><a class="header-anchor" href="#_02、set" aria-hidden="true">#</a> 02、Set</h3><blockquote><p>Set 的特点是存取无序，不可以存放重复的元素，不可以用下标对元素进行操作，和 List 有很多不同</p></blockquote><p><strong>1）HashSet</strong></p><p>HashSet 其实是由 HashMap 实现的，只不过值由一个固定的 Object 对象填充，而键用于操作。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">HashSet</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">E</span><span class="token punctuation">&gt;</span></span>
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clickable"><!----><span class="title">2.1 Java概述</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.2 Java基础语法</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.3 面向对象编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.4 字符串&amp;数组</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">2.5 集合框架（容器）</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a aria-current="page" href="/collection/gailan.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="概述"><!---->概述<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/collection/gailan.html#_01、list" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="01、List"><!---->01、List<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/collection/gailan.html#_02、set" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="02、Set"><!---->02、Set<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/collection/gailan.html#_03、queue" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="03、Queue"><!---->03、Queue<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/collection/gailan.html#_04、map" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="04、Map"><!---->04、Map<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/collection/gailan.html#_05、时间复杂度" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="05、时间复杂度"><!---->05、时间复杂度<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/collection/arraylist.html" class="nav-link sidebar-link sidebar-page" aria-label="ArrayList"><!---->ArrayList<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/collection/linkedlist.html" class="nav-link sidebar-link sidebar-page" aria-label="LinkedList"><!---->LinkedList<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/collection/list-war-2.html" class="nav-link sidebar-link sidebar-page" aria-label="ArrayList和LinkedList的区别"><!---->ArrayList和LinkedList的区别<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/collection/iterator-iterable.html" class="nav-link sidebar-link sidebar-page" aria-label="Iterator和Iterable"><!---->Iterator和Iterable<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/collection/fail-fast.html" class="nav-link sidebar-link sidebar-page" aria-label="fail-fast"><!---->fail-fast<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/collection/hashmap.html" class="nav-link sidebar-link sidebar-page" aria-label="HashMap"><!---->HashMap<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.6 IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.11 并发编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java集合框架</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 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aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 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aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 10 分钟</span><meta property="timeRequired" content="PT10M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/collection/gailan.html#_01、list" class="router-link-active router-link-exact-active toc-link level3">01、List</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/collection/gailan.html#_02、set" class="router-link-active router-link-exact-active toc-link level3">02、Set</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/collection/gailan.html#_03、queue" class="router-link-active router-link-exact-active toc-link level3">03、Queue</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/collection/gailan.html#_04、map" class="router-link-active router-link-exact-active toc-link level3">04、Map</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/collection/gailan.html#_05、时间复杂度" class="router-link-active router-link-exact-active toc-link level3">05、时间复杂度</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="java集合框架" tabindex="-1"><a class="header-anchor" href="#java集合框架" aria-hidden="true">#</a> Java集合框架</h1><p>眼瞅着三妹的王者荣耀杀得正嗨，我趁机喊到：“别打了，三妹，我们来一起学习 Java 的集合框架吧。”</p><p>“才不要呢，等我打完这一局啊。”三妹倔强地说。</p><p>“好吧。”我只好摊摊手地说，“那我先画张集合框架的结构图等着你。”</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/collection/gailan-01.png" alt=""></p><p>“完了没？三妹。”</p><p>“完了好一会儿了，二哥，你图画得真慢，让我瞧瞧怎么样？”</p><p>“害，图要画得清晰明了，不容易的。三妹，你瞧，不错吧。”</p><p>Java 集合框架可以分为两条大的支线：</p><ul><li>Collection，主要由 List、Set、Queue 组成，List 代表有序、可重复的集合，典型代表就是封装了动态数组的 ArrayList 和封装了链表的 LinkedList；Set 代表无序、不可重复的集合，典型代表就是 HashSet 和 TreeSet；Queue 代表队列，典型代表就是双端队列 ArrayDeque，以及优先级队列 PriorityQue。</li><li>Map，代表键值对的集合，典型代表就是 HashMap。</li></ul><p>“接下来，我们再来过一遍。”</p><h3 id="_01、list" tabindex="-1"><a class="header-anchor" href="#_01、list" aria-hidden="true">#</a> 01、List</h3><blockquote><p>List 的特点是存取有序，可以存放重复的元素，可以用下标对元素进行操作</p></blockquote><p><strong>1）ArrayList</strong></p><ul><li>ArrayList 是由数组实现的，支持随机存取，也就是可以通过下标直接存取元素；</li><li>从尾部插入和删除元素会比较快捷，从中间插入和删除元素会比较低效，因为涉及到数组元素的复制和移动；</li><li>如果内部数组的容量不足时会自动扩容，因此当元素非常庞大的时候，效率会比较低。</li></ul><p><strong>2）LinkedList</strong></p><ul><li>LinkedList 是由双向链表实现的，不支持随机存取，只能从一端开始遍历，直到找到需要的元素后返回；</li><li>任意位置插入和删除元素都很方便，因为只需要改变前一个节点和后一个节点的引用即可，不像 ArrayList 那样需要复制和移动数组元素；</li><li>因为每个元素都存储了前一个和后一个节点的引用，所以相对来说，占用的内存空间会比 ArrayList 多一些。</li></ul><p><strong>3）Vector 和 Stack</strong></p><p>List 的实现类还有一个 Vector，是一个元老级的类，比 ArrayList 出现得更早。ArrayList 和 Vector 非常相似，只不过 Vector 是线程安全的，像 get、set、add 这些方法都加了 <code>synchronized</code> 关键字，就导致执行执行效率会比较低，所以现在已经很少用了。</p><p>更好的选择是并发包下的 CopyOnWriteArrayList。</p><p>Stack 是 Vector 的一个子类，本质上也是由动态数组实现的，只不过还实现了先进后出的功能（在 get、set、add 方法的基础上追加了 pop、peek 等方法），所以叫栈。</p><p>不过，由于 Stack 执行效率比较低（方法上同样加了 synchronized 关键字），就被双端队列 ArrayDeque 取代了。</p><h3 id="_02、set" tabindex="-1"><a class="header-anchor" href="#_02、set" aria-hidden="true">#</a> 02、Set</h3><blockquote><p>Set 的特点是存取无序，不可以存放重复的元素，不可以用下标对元素进行操作，和 List 有很多不同</p></blockquote><p><strong>1）HashSet</strong></p><p>HashSet 其实是由 HashMap 实现的，只不过值由一个固定的 Object 对象填充，而键用于操作。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">HashSet</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">E</span><span class="token punctuation">&gt;</span></span>
     <span class="token keyword">extends</span> <span class="token class-name">AbstractSet</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">E</span><span class="token punctuation">&gt;</span></span>
     <span class="token keyword">implements</span> <span class="token class-name">Set</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">E</span><span class="token punctuation">&gt;</span></span><span class="token punctuation">,</span> <span class="token class-name">Cloneable</span><span class="token punctuation">,</span> <span class="token class-name"><span class="token namespace">java<span class="token punctuation">.</span>io<span class="token punctuation">.</span></span>Serializable</span>
 <span class="token punctuation">{</span>
@@ -121,6 +121,6 @@
    ...    |  ...
     k     |  i*2^k 
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>“好了，三妹，这节就讲到这吧，理解了上面 3 个时间复杂度，后面我们学习 ArrayList、LinkedList 的时候，两者在增删改查时的执行效率就很容易对比清楚了。”我伸了个懒腰后对三妹说，“整体上，集合框架就这么多东西了，随后我们会一一展开来讲，比如说 ArrayList、LinkedList、HashMap 等。”。</p><p>“好的，二哥。”三妹重新回答沙发上，一盘王者荣耀即将开始。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/collection/gailan.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/14 上午7:14:28</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><!----><a href="/collection/arraylist.html" class="nav-link next" aria-label="ArrayList"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">ArrayList<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 8 分钟</span><meta property="timeRequired" content="PT8M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/collection/hashmap-interview.html#_01、hashmap的底层数据结构是什么" class="router-link-active router-link-exact-active toc-link level3">01、HashMap的底层数据结构是什么？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/collection/hashmap-interview.html#_02、为什么链表改为红黑树的阈值是-8" class="router-link-active router-link-exact-active toc-link level3">02、为什么链表改为红黑树的阈值是 8?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/collection/hashmap-interview.html#_03、解决hash冲突的办法有哪些-hashmap用的哪种" class="router-link-active router-link-exact-active toc-link level3">03、解决hash冲突的办法有哪些？HashMap用的哪种？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/collection/hashmap-interview.html#_04、为什么在解决-hash-冲突的时候-不直接用红黑树-而选择先用链表-再转红黑树" class="router-link-active router-link-exact-active toc-link level3">04、为什么在解决 hash 冲突的时候，不直接用红黑树？而选择先用链表，再转红黑树?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/collection/hashmap-interview.html#_05、hashmap默认加载因子是多少-为什么是-0-75-不是-0-6-或者-0-8" class="router-link-active router-link-exact-active toc-link level3">05、HashMap默认加载因子是多少？为什么是 0.75，不是 0.6 或者 0.8 ？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/collection/hashmap-interview.html#_06、hashmap-中-key-的存储索引是怎么计算的" class="router-link-active router-link-exact-active toc-link level3">06、HashMap 中  key 的存储索引是怎么计算的？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/collection/hashmap-interview.html#_07、jdk-8-为什么要-hashcode-异或其右移十六位的值" class="router-link-active router-link-exact-active toc-link level3">07、JDK 8 为什么要 hashcode 异或其右移十六位的值？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/collection/hashmap-interview.html#_08、为什么-hash-值要与length-1相与" class="router-link-active router-link-exact-active toc-link level3">08、为什么 hash 值要与length-1相与？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/collection/hashmap-interview.html#_09、hashmap数组的长度为什么是-2-的幂次方" class="router-link-active router-link-exact-active toc-link level3">09、HashMap数组的长度为什么是 2 的幂次方？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/collection/hashmap-interview.html#_10、hashmap-的put方法流程" class="router-link-active router-link-exact-active toc-link level3">10、HashMap 的put方法流程？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/collection/hashmap-interview.html#_11、hashmap-的扩容方式" class="router-link-active router-link-exact-active toc-link level3">11、HashMap 的扩容方式？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/collection/hashmap-interview.html#_12、一般用什么作为hashmap的key" class="router-link-active router-link-exact-active toc-link level3">12、一般用什么作为HashMap的key?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/collection/hashmap-interview.html#_13、hashmap为什么线程不安全" class="router-link-active router-link-exact-active toc-link level3">13、HashMap为什么线程不安全？</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="java-hashmap精选面试题" tabindex="-1"><a class="header-anchor" href="#java-hashmap精选面试题" aria-hidden="true">#</a> Java HashMap精选面试题</h1><p>对于 Java 求职者来说，HashMap 可谓是重中之重，是面试的必考点。然而 HashMap 的知识点非常多，复习起来花费精力很大。</p><h3 id="_01、hashmap的底层数据结构是什么" tabindex="-1"><a class="header-anchor" href="#_01、hashmap的底层数据结构是什么" aria-hidden="true">#</a> 01、HashMap的底层数据结构是什么？</h3><p>JDK 7 中，HashMap 由“数组+链表”组成，数组是 HashMap 的主体，链表则是主要为了解决哈希冲突而存在的。</p><p>在 JDK 8 中，HashMap 由“数组+链表+红黑树”组成。链表过长，会严重影响 HashMap 的性能，而红黑树搜索的时间复杂度是 O(logn)，而链表是糟糕的 O(n)。因此，JDK 8 对数据结构做了进一步的优化，引入了红黑树，链表和红黑树在达到一定条件会进行转换：</p><ul><li>当链表超过 8 且数据总量超过 64 时会转红黑树。</li><li>将链表转换成红黑树前会判断，如果当前数组的长度小于 64，那么会选择先进行数组扩容，而不是转换为红黑树，以减少搜索时间。</li></ul><p>链表长度超过 8 体现在 putVal 方法中的这段代码：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token comment">//链表长度大于8转换为红黑树进行处理</span>
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clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">六、求职面试</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">面试题集合</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/baguwen/java-basic-34.html" class="nav-link sidebar-link sidebar-page" aria-label="Java：34道精选高频面试题必看👍"><!---->Java：34道精选高频面试题必看👍<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/collection/hashmap-interview.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="Java HashMap精选面试题"><!---->Java HashMap精选面试题<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/collection/hashmap-interview.html#_01、hashmap的底层数据结构是什么" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="01、HashMap的底层数据结构是什么？"><!---->01、HashMap的底层数据结构是什么？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/collection/hashmap-interview.html#_02、为什么链表改为红黑树的阈值是-8" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="02、为什么链表改为红黑树的阈值是 8?"><!---->02、为什么链表改为红黑树的阈值是 8?<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/collection/hashmap-interview.html#_03、解决hash冲突的办法有哪些-hashmap用的哪种" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="03、解决hash冲突的办法有哪些？HashMap用的哪种？"><!---->03、解决hash冲突的办法有哪些？HashMap用的哪种？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/collection/hashmap-interview.html#_04、为什么在解决-hash-冲突的时候-不直接用红黑树-而选择先用链表-再转红黑树" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="04、为什么在解决 hash 冲突的时候，不直接用红黑树？而选择先用链表，再转红黑树?"><!---->04、为什么在解决 hash 冲突的时候，不直接用红黑树？而选择先用链表，再转红黑树?<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/collection/hashmap-interview.html#_05、hashmap默认加载因子是多少-为什么是-0-75-不是-0-6-或者-0-8" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="05、HashMap默认加载因子是多少？为什么是 0.75，不是 0.6 或者 0.8 ？"><!---->05、HashMap默认加载因子是多少？为什么是 0.75，不是 0.6 或者 0.8 ？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/collection/hashmap-interview.html#_06、hashmap-中-key-的存储索引是怎么计算的" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="06、HashMap 中  key 的存储索引是怎么计算的？"><!---->06、HashMap 中  key 的存储索引是怎么计算的？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/collection/hashmap-interview.html#_07、jdk-8-为什么要-hashcode-异或其右移十六位的值" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="07、JDK 8 为什么要 hashcode 异或其右移十六位的值？"><!---->07、JDK 8 为什么要 hashcode 异或其右移十六位的值？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/collection/hashmap-interview.html#_08、为什么-hash-值要与length-1相与" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="08、为什么 hash 值要与length-1相与？"><!---->08、为什么 hash 值要与length-1相与？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/collection/hashmap-interview.html#_09、hashmap数组的长度为什么是-2-的幂次方" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="09、HashMap数组的长度为什么是 2 的幂次方？"><!---->09、HashMap数组的长度为什么是 2 的幂次方？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/collection/hashmap-interview.html#_10、hashmap-的put方法流程" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="10、HashMap 的put方法流程？"><!---->10、HashMap 的put方法流程？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/collection/hashmap-interview.html#_11、hashmap-的扩容方式" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="11、HashMap 的扩容方式？"><!---->11、HashMap 的扩容方式？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/collection/hashmap-interview.html#_12、一般用什么作为hashmap的key" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="12、一般用什么作为HashMap的key?"><!---->12、一般用什么作为HashMap的key?<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/collection/hashmap-interview.html#_13、hashmap为什么线程不安全" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="13、HashMap为什么线程不安全？"><!---->13、HashMap为什么线程不安全？<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/mianjing/redis12question.html" class="nav-link sidebar-link sidebar-page" aria-label="Redis：12道精选高频面试题"><!---->Redis：12道精选高频面试题<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/nginx/40-interview.html" class="nav-link sidebar-link sidebar-page" aria-label="Nginx：40道精选面试题必看👍"><!---->Nginx：40道精选面试题必看👍<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">背诵版八股文</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">城市选择</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java HashMap精选面试题</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 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458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag7" role>面试题集合</li></ul><meta property="keywords" content="面试题集合"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 8 分钟</span><meta property="timeRequired" content="PT8M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/collection/hashmap-interview.html#_01、hashmap的底层数据结构是什么" class="router-link-active router-link-exact-active toc-link level3">01、HashMap的底层数据结构是什么？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/collection/hashmap-interview.html#_02、为什么链表改为红黑树的阈值是-8" class="router-link-active router-link-exact-active toc-link level3">02、为什么链表改为红黑树的阈值是 8?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/collection/hashmap-interview.html#_03、解决hash冲突的办法有哪些-hashmap用的哪种" class="router-link-active router-link-exact-active toc-link level3">03、解决hash冲突的办法有哪些？HashMap用的哪种？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/collection/hashmap-interview.html#_04、为什么在解决-hash-冲突的时候-不直接用红黑树-而选择先用链表-再转红黑树" class="router-link-active router-link-exact-active toc-link level3">04、为什么在解决 hash 冲突的时候，不直接用红黑树？而选择先用链表，再转红黑树?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/collection/hashmap-interview.html#_05、hashmap默认加载因子是多少-为什么是-0-75-不是-0-6-或者-0-8" class="router-link-active router-link-exact-active toc-link level3">05、HashMap默认加载因子是多少？为什么是 0.75，不是 0.6 或者 0.8 ？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/collection/hashmap-interview.html#_06、hashmap-中-key-的存储索引是怎么计算的" class="router-link-active router-link-exact-active toc-link level3">06、HashMap 中  key 的存储索引是怎么计算的？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/collection/hashmap-interview.html#_07、jdk-8-为什么要-hashcode-异或其右移十六位的值" class="router-link-active router-link-exact-active toc-link level3">07、JDK 8 为什么要 hashcode 异或其右移十六位的值？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/collection/hashmap-interview.html#_08、为什么-hash-值要与length-1相与" class="router-link-active router-link-exact-active toc-link level3">08、为什么 hash 值要与length-1相与？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/collection/hashmap-interview.html#_09、hashmap数组的长度为什么是-2-的幂次方" class="router-link-active router-link-exact-active toc-link level3">09、HashMap数组的长度为什么是 2 的幂次方？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/collection/hashmap-interview.html#_10、hashmap-的put方法流程" class="router-link-active router-link-exact-active toc-link level3">10、HashMap 的put方法流程？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/collection/hashmap-interview.html#_11、hashmap-的扩容方式" class="router-link-active router-link-exact-active toc-link level3">11、HashMap 的扩容方式？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/collection/hashmap-interview.html#_12、一般用什么作为hashmap的key" class="router-link-active router-link-exact-active toc-link level3">12、一般用什么作为HashMap的key?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/collection/hashmap-interview.html#_13、hashmap为什么线程不安全" class="router-link-active router-link-exact-active toc-link level3">13、HashMap为什么线程不安全？</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="java-hashmap精选面试题" tabindex="-1"><a class="header-anchor" href="#java-hashmap精选面试题" aria-hidden="true">#</a> Java HashMap精选面试题</h1><p>对于 Java 求职者来说，HashMap 可谓是重中之重，是面试的必考点。然而 HashMap 的知识点非常多，复习起来花费精力很大。</p><h3 id="_01、hashmap的底层数据结构是什么" tabindex="-1"><a class="header-anchor" href="#_01、hashmap的底层数据结构是什么" aria-hidden="true">#</a> 01、HashMap的底层数据结构是什么？</h3><p>JDK 7 中，HashMap 由“数组+链表”组成，数组是 HashMap 的主体，链表则是主要为了解决哈希冲突而存在的。</p><p>在 JDK 8 中，HashMap 由“数组+链表+红黑树”组成。链表过长，会严重影响 HashMap 的性能，而红黑树搜索的时间复杂度是 O(logn)，而链表是糟糕的 O(n)。因此，JDK 8 对数据结构做了进一步的优化，引入了红黑树，链表和红黑树在达到一定条件会进行转换：</p><ul><li>当链表超过 8 且数据总量超过 64 时会转红黑树。</li><li>将链表转换成红黑树前会判断，如果当前数组的长度小于 64，那么会选择先进行数组扩容，而不是转换为红黑树，以减少搜索时间。</li></ul><p>链表长度超过 8 体现在 putVal 方法中的这段代码：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token comment">//链表长度大于8转换为红黑树进行处理</span>
 <span class="token keyword">if</span> <span class="token punctuation">(</span>binCount <span class="token operator">&gt;=</span> TREEIFY_THRESHOLD <span class="token operator">-</span> <span class="token number">1</span><span class="token punctuation">)</span> <span class="token comment">// -1 for 1st</span>
     <span class="token function">treeifyBin</span><span class="token punctuation">(</span>tab<span class="token punctuation">,</span> hash<span class="token punctuation">)</span><span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>table 长度为 64 体现在 treeifyBin 方法中的这段代码：：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">final</span> <span class="token keyword">void</span> <span class="token function">treeifyBin</span><span class="token punctuation">(</span><span class="token class-name">Node</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">K</span><span class="token punctuation">,</span><span class="token class-name">V</span><span class="token punctuation">&gt;</span></span><span class="token punctuation">[</span><span class="token punctuation">]</span> tab<span class="token punctuation">,</span> <span class="token keyword">int</span> hash<span class="token punctuation">)</span> <span class="token punctuation">{</span>
@@ -61,6 +61,6 @@
         <span class="token keyword">return</span> <span class="token punctuation">(</span>n <span class="token operator">&lt;</span> <span class="token number">0</span><span class="token punctuation">)</span> <span class="token operator">?</span> <span class="token number">1</span> <span class="token operator">:</span> <span class="token punctuation">(</span>n <span class="token operator">&gt;=</span> MAXIMUM_CAPACITY<span class="token punctuation">)</span> <span class="token operator">?</span> MAXIMUM_CAPACITY <span class="token operator">:</span> n <span class="token operator">+</span> <span class="token number">1</span><span class="token punctuation">;</span>
     <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>让cap-1再赋值给n的目的是另找到的目标值大于或等于原值。例如二进制1000，十进制数值为8。如果不对它减1而直接操作，将得到答案10000，即16。显然不是结果。减1后二进制为111，再进行操作则会得到原来的数值1000，即8。</p><h3 id="_10、hashmap-的put方法流程" tabindex="-1"><a class="header-anchor" href="#_10、hashmap-的put方法流程" aria-hidden="true">#</a> 10、HashMap 的put方法流程？</h3><p>以JDK 8为例，简要流程如下：</p><p>1、首先根据 key 的值计算 hash 值，找到该元素在数组中存储的下标；</p><p>2、如果数组是空的，则调用 resize 进行初始化；</p><p>3、如果没有哈希冲突直接放在对应的数组下标里；</p><p>4、如果冲突了，且 key 已经存在，就覆盖掉 value；</p><p>5、如果冲突后，发现该节点是红黑树，就将这个节点挂在树上；</p><p>6、如果冲突后是链表，判断该链表是否大于 8 ，如果大于 8 并且数组容量小于 64，就进行扩容；如果链表节点大于 8 并且数组的容量大于 64，则将这个结构转换为红黑树；否则，链表插入键值对，若 key 存在，就覆盖掉 value。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/collection/hashmap-interview-03.png" alt=""></p><h3 id="_11、hashmap-的扩容方式" tabindex="-1"><a class="header-anchor" href="#_11、hashmap-的扩容方式" aria-hidden="true">#</a> 11、HashMap 的扩容方式？</h3><p>HashMap 在容量超过负载因子所定义的容量之后，就会扩容。</p><p><a href="https://mp.weixin.qq.com/s/0KSpdBJMfXSVH63XadVdmw" target="_blank" rel="noopener noreferrer">详情参照这篇<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><h3 id="_12、一般用什么作为hashmap的key" tabindex="-1"><a class="header-anchor" href="#_12、一般用什么作为hashmap的key" aria-hidden="true">#</a> 12、一般用什么作为HashMap的key?</h3><p>一般用Integer、String 这种不可变类当作 HashMap 的 key，String 最为常见。</p><ul><li>因为字符串是不可变的，所以在它创建的时候 hashcode 就被缓存了，不需要重新计算。</li><li>因为获取对象的时候要用到 equals() 和 hashCode() 方法，那么键对象正确的重写这两个方法是非常重要的。Integer、String 这些类已经很规范的重写了 hashCode() 以及 equals() 方法。</li></ul><h3 id="_13、hashmap为什么线程不安全" tabindex="-1"><a class="header-anchor" href="#_13、hashmap为什么线程不安全" aria-hidden="true">#</a> 13、HashMap为什么线程不安全？</h3><ul><li>JDK 7 时多线程下扩容会造成死循环。</li><li>多线程的put可能导致元素的丢失。</li><li>put和get并发时，可能导致get为null。</li></ul><p><a href="https://mp.weixin.qq.com/s/qk_neCdzM3aB6pVWVTHhNw" target="_blank" rel="noopener noreferrer">详情参照这篇<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><blockquote><p>参考链接：https://zhuanlan.zhihu.com/p/362214327</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/collection/hashmap-interview.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 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-    <script type="module" src="/assets/app.a0271b9c.js" defer></script>
+    <script type="module" src="/assets/app.615e41d8.js" defer></script>
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diff --git a/dist/collection/hashmap.html b/dist/collection/hashmap.html
index cfb6c85f..53b47d8b 100644
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@@ -39,10 +39,10 @@
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aria-label="一、前言"><!---->一、前言<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">二、Java核心</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.1 Java概述</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.2 Java基础语法</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.3 面向对象编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.4 字符串&amp;数组</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">2.5 集合框架（容器）</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/collection/gailan.html" class="nav-link sidebar-link sidebar-page" aria-label="概述"><!---->概述<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/collection/arraylist.html" class="nav-link sidebar-link sidebar-page" aria-label="ArrayList"><!---->ArrayList<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/collection/linkedlist.html" class="nav-link sidebar-link sidebar-page" aria-label="LinkedList"><!---->LinkedList<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/collection/list-war-2.html" class="nav-link sidebar-link sidebar-page" aria-label="ArrayList和LinkedList的区别"><!---->ArrayList和LinkedList的区别<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/collection/iterator-iterable.html" class="nav-link sidebar-link sidebar-page" aria-label="Iterator和Iterable"><!---->Iterator和Iterable<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/collection/fail-fast.html" class="nav-link sidebar-link sidebar-page" aria-label="fail-fast"><!---->fail-fast<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/collection/hashmap.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="HashMap"><!---->HashMap<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/collection/hashmap.html#一、hash-方法的原理" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="一、hash 方法的原理"><!---->一、hash 方法的原理<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/collection/hashmap.html#二、扩容机制" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="二、扩容机制"><!---->二、扩容机制<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/collection/hashmap.html#三、加载因子为什么是0-75" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="三、加载因子为什么是0.75"><!---->三、加载因子为什么是0.75<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/collection/hashmap.html#四、线程不安全" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="四、线程不安全"><!---->四、线程不安全<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/collection/hashmap.html#_01、多线程下扩容会死循环" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="01、多线程下扩容会死循环"><!---->01、多线程下扩容会死循环<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/collection/hashmap.html#_02、多线程下-put-会导致元素丢失" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="02、多线程下 put 会导致元素丢失"><!---->02、多线程下 put 会导致元素丢失<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/collection/hashmap.html#_03、put-和-get-并发时会导致-get-到-null" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="03、put 和 get 并发时会导致 get 到 null"><!---->03、put 和 get 并发时会导致 get 到 null<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.6 IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.11 并发编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java8系列之重新认识HashMap</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 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aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 23 分钟</span><meta property="timeRequired" content="PT23M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/collection/hashmap.html#一、hash-方法的原理" class="router-link-active router-link-exact-active toc-link level2">一、hash 方法的原理</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/collection/hashmap.html#二、扩容机制" class="router-link-active router-link-exact-active toc-link level2">二、扩容机制</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/collection/hashmap.html#三、加载因子为什么是0-75" class="router-link-active router-link-exact-active toc-link level2">三、加载因子为什么是0.75</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/collection/hashmap.html#四、线程不安全" class="router-link-active router-link-exact-active toc-link level2">四、线程不安全</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/collection/hashmap.html#_01、多线程下扩容会死循环" class="router-link-active router-link-exact-active toc-link level3">01、多线程下扩容会死循环</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/collection/hashmap.html#_02、多线程下-put-会导致元素丢失" class="router-link-active router-link-exact-active toc-link level3">02、多线程下 put 会导致元素丢失</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/collection/hashmap.html#_03、put-和-get-并发时会导致-get-到-null" class="router-link-active router-link-exact-active toc-link level3">03、put 和 get 并发时会导致 get 到 null</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="java8系列之重新认识hashmap" tabindex="-1"><a class="header-anchor" href="#java8系列之重新认识hashmap" aria-hidden="true">#</a> Java8系列之重新认识HashMap</h1><h2 id="一、hash-方法的原理" tabindex="-1"><a class="header-anchor" href="#一、hash-方法的原理" aria-hidden="true">#</a> 一、hash 方法的原理</h2><p>来看一下 hash 方法的源码（JDK 8 中的 HashMap）：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">static</span> <span class="token keyword">final</span> <span class="token keyword">int</span> <span class="token function">hash</span><span class="token punctuation">(</span><span class="token class-name">Object</span> key<span class="token punctuation">)</span> <span class="token punctuation">{</span>
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clickable"><!----><span class="title">2.1 Java概述</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.2 Java基础语法</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.3 面向对象编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.4 字符串&amp;数组</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">2.5 集合框架（容器）</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/collection/gailan.html" class="nav-link sidebar-link sidebar-page" aria-label="概述"><!---->概述<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/collection/arraylist.html" class="nav-link sidebar-link sidebar-page" aria-label="ArrayList"><!---->ArrayList<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/collection/linkedlist.html" class="nav-link sidebar-link sidebar-page" aria-label="LinkedList"><!---->LinkedList<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/collection/list-war-2.html" class="nav-link sidebar-link sidebar-page" aria-label="ArrayList和LinkedList的区别"><!---->ArrayList和LinkedList的区别<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/collection/iterator-iterable.html" class="nav-link sidebar-link sidebar-page" aria-label="Iterator和Iterable"><!---->Iterator和Iterable<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/collection/fail-fast.html" class="nav-link sidebar-link sidebar-page" aria-label="fail-fast"><!---->fail-fast<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/collection/hashmap.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="HashMap"><!---->HashMap<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/collection/hashmap.html#一、hash-方法的原理" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="一、hash 方法的原理"><!---->一、hash 方法的原理<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/collection/hashmap.html#二、扩容机制" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="二、扩容机制"><!---->二、扩容机制<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/collection/hashmap.html#三、加载因子为什么是0-75" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="三、加载因子为什么是0.75"><!---->三、加载因子为什么是0.75<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/collection/hashmap.html#四、线程不安全" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="四、线程不安全"><!---->四、线程不安全<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/collection/hashmap.html#_01、多线程下扩容会死循环" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="01、多线程下扩容会死循环"><!---->01、多线程下扩容会死循环<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/collection/hashmap.html#_02、多线程下-put-会导致元素丢失" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="02、多线程下 put 会导致元素丢失"><!---->02、多线程下 put 会导致元素丢失<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/collection/hashmap.html#_03、put-和-get-并发时会导致-get-到-null" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="03、put 和 get 并发时会导致 get 到 null"><!---->03、put 和 get 并发时会导致 get 到 null<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.6 IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.11 并发编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java8系列之重新认识HashMap</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 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40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><meta property="articleSection" content="Java核心"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag 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4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 23 分钟</span><meta property="timeRequired" content="PT23M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/collection/hashmap.html#一、hash-方法的原理" class="router-link-active router-link-exact-active toc-link level2">一、hash 方法的原理</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/collection/hashmap.html#二、扩容机制" class="router-link-active router-link-exact-active toc-link level2">二、扩容机制</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/collection/hashmap.html#三、加载因子为什么是0-75" class="router-link-active router-link-exact-active toc-link level2">三、加载因子为什么是0.75</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/collection/hashmap.html#四、线程不安全" class="router-link-active router-link-exact-active toc-link level2">四、线程不安全</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/collection/hashmap.html#_01、多线程下扩容会死循环" class="router-link-active router-link-exact-active toc-link level3">01、多线程下扩容会死循环</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/collection/hashmap.html#_02、多线程下-put-会导致元素丢失" class="router-link-active router-link-exact-active toc-link level3">02、多线程下 put 会导致元素丢失</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/collection/hashmap.html#_03、put-和-get-并发时会导致-get-到-null" class="router-link-active router-link-exact-active toc-link level3">03、put 和 get 并发时会导致 get 到 null</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="java8系列之重新认识hashmap" tabindex="-1"><a class="header-anchor" href="#java8系列之重新认识hashmap" aria-hidden="true">#</a> Java8系列之重新认识HashMap</h1><h2 id="一、hash-方法的原理" tabindex="-1"><a class="header-anchor" href="#一、hash-方法的原理" aria-hidden="true">#</a> 一、hash 方法的原理</h2><p>来看一下 hash 方法的源码（JDK 8 中的 HashMap）：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">static</span> <span class="token keyword">final</span> <span class="token keyword">int</span> <span class="token function">hash</span><span class="token punctuation">(</span><span class="token class-name">Object</span> key<span class="token punctuation">)</span> <span class="token punctuation">{</span>
     <span class="token keyword">int</span> h<span class="token punctuation">;</span>
     <span class="token keyword">return</span> <span class="token punctuation">(</span>key <span class="token operator">==</span> <span class="token keyword">null</span><span class="token punctuation">)</span> <span class="token operator">?</span> <span class="token number">0</span> <span class="token operator">:</span> <span class="token punctuation">(</span>h <span class="token operator">=</span> key<span class="token punctuation">.</span><span class="token function">hashCode</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token operator">^</span> <span class="token punctuation">(</span>h <span class="token operator">&gt;&gt;&gt;</span> <span class="token number">16</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 <span class="token punctuation">}</span>
@@ -379,6 +379,6 @@ more: less than 1 in ten million
     table <span class="token operator">=</span> newTab<span class="token punctuation">;</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>线程 A 执行完 <code>table = newTab</code> 之后，线程 B 中的 table 此时也发生了变化，此时去 get 的时候当然会 get 到 null 了，因为元素还没有转移。</p><p>参考链接：</p><blockquote><ul><li>https://blog.csdn.net/lonyw/article/details/80519652</li><li>https://zhuanlan.zhihu.com/p/91636401</li><li>https://www.zhihu.com/question/20733617</li><li>https://zhuanlan.zhihu.com/p/21673805</li></ul></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/collection/hashmap.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/6/6 下午11:31:27</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/collection/fail-fast.html" class="nav-link prev" aria-label="fail-fast"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->fail-fast</div></a><!----></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 4 分钟</span><meta property="timeRequired" content="PT4M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="java中的iterator和iterable区别" tabindex="-1"><a class="header-anchor" href="#java中的iterator和iterable区别" aria-hidden="true">#</a> Java中的Iterator和Iterable区别</h1><p>那天，小二去海康威视面试，面试官老王一上来就甩给了他一道面试题：请问 Iterator与Iterable有什么区别？</p><hr><p>在 Java 中，我们对 List 进行遍历的时候，主要有这么三种方式。</p><p>第一种：for 循环。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">for</span> <span class="token punctuation">(</span><span class="token keyword">int</span> i <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span> i <span class="token operator">&lt;</span> list<span class="token punctuation">.</span><span class="token function">size</span><span class="token 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class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java中的Iterator和Iterable区别</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 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354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 4 分钟</span><meta property="timeRequired" content="PT4M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="java中的iterator和iterable区别" tabindex="-1"><a class="header-anchor" href="#java中的iterator和iterable区别" aria-hidden="true">#</a> Java中的Iterator和Iterable区别</h1><p>那天，小二去海康威视面试，面试官老王一上来就甩给了他一道面试题：请问 Iterator与Iterable有什么区别？</p><hr><p>在 Java 中，我们对 List 进行遍历的时候，主要有这么三种方式。</p><p>第一种：for 循环。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">for</span> <span class="token punctuation">(</span><span class="token keyword">int</span> i <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span> i <span class="token operator">&lt;</span> list<span class="token punctuation">.</span><span class="token function">size</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> i<span class="token operator">++</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
     <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">print</span><span class="token punctuation">(</span>list<span class="token punctuation">.</span><span class="token function">get</span><span class="token punctuation">(</span>i<span class="token punctuation">)</span> <span class="token operator">+</span> <span class="token string">&quot;，&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>第二种：迭代器。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">Iterator</span> it <span class="token operator">=</span> list<span class="token punctuation">.</span><span class="token function">iterator</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
@@ -149,6 +149,6 @@ list<span class="token punctuation">.</span><span class="token function">forEach
 <span class="token keyword">while</span> <span class="token punctuation">(</span>it<span class="token punctuation">.</span><span class="token function">hasNext</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><hr><p>好了，关于Iterator与Iterable我们就先聊这么多，总结两点：</p><ul><li>学会深入思考，一点点抽丝剥茧，多想想为什么这样实现，很多问题没有自己想象中的那么复杂。</li><li>遇到疑惑不放弃，这是提升自己最好的机会，遇到某个疑难的点，解决的过程中会挖掘出很多相关的东西。</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/collection/iterator-iterable.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/14 上午7:14:28</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/collection/list-war-2.html" class="nav-link prev" aria-label="ArrayList和LinkedList的区别"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->ArrayList和LinkedList的区别</div></a><a href="/collection/fail-fast.html" class="nav-link next" aria-label="fail-fast"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">fail-fast<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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diff --git a/dist/collection/linkedlist.html b/dist/collection/linkedlist.html
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id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java集合LinkedList详解</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg 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213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 8 分钟</span><meta property="timeRequired" content="PT8M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/collection/linkedlist.html#一、linkedlist-的剖白" class="router-link-active router-link-exact-active toc-link level3">一、LinkedList 的剖白</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/collection/linkedlist.html#二、linkedlist-的内功心法" class="router-link-active router-link-exact-active toc-link level3">二、LinkedList 的内功心法</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/collection/linkedlist.html#_03、linkedlist-的招式" class="router-link-active router-link-exact-active toc-link level3">03、LinkedList 的招式</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/collection/linkedlist.html#四、linkedlist-的挑战" class="router-link-active router-link-exact-active toc-link level3">四、LinkedList 的挑战</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="java集合linkedlist详解" tabindex="-1"><a class="header-anchor" href="#java集合linkedlist详解" aria-hidden="true">#</a> Java集合LinkedList详解</h1><h3 id="一、linkedlist-的剖白" tabindex="-1"><a class="header-anchor" href="#一、linkedlist-的剖白" aria-hidden="true">#</a> 一、LinkedList 的剖白</h3><p>大家好，我是 LinkedList，和 ArrayList 是同门师兄弟，但我俩练的内功却完全不同。师兄练的是动态数组，我练的是链表。</p><p>问大家一个问题，知道我为什么要练链表这门内功吗？</p><p>举个例子来讲吧，假如你们手头要管理一推票据，可能有一张，也可能有一亿张。</p><p>该怎么办呢？</p><p>申请一个 10G 的大数组等着？那万一票据只有 100 张呢？</p><p>申请一个默认大小的数组，随着数据量的增大扩容？要知道扩容是需要重新复制数组的，很耗时间。</p><p>关键是，数组还有一个弊端就是，假如现在有 500 万张票据，现在要从中间删除一个票据，就需要把 250 万张票据往前移动一格。</p><p>遇到这种情况的时候，我师兄几乎情绪崩溃，难受的要命。师父不忍心看到师兄这样痛苦，于是打我进入师门那一天，就强迫我练链表这门内功，一开始我很不理解，害怕师父偏心，不把师门最厉害的内功教我。</p><p>直到有一天，我亲眼目睹师兄差点因为移动数据而走火入魔，我才明白师父的良苦用心。从此以后，我苦练“链表”这门内功，取得了显著的进步，师父和师兄都夸我有天赋。</p><p>链表这门内功大致分为三个层次：</p><ul><li>第一层叫做“单向链表”，我只有一个后指针，指向下一个数据；</li><li>第二层叫做“双向链表”，我有两个指针，后指针指向下一个数据，前指针指向上一个数据。</li><li>第三层叫做“二叉树”，把后指针去掉，换成左右指针。</li></ul><p>但我现在的功力还达不到第三层，不过师父说我有这个潜力，练成神功是早晚的事。</p><h3 id="二、linkedlist-的内功心法" tabindex="-1"><a class="header-anchor" href="#二、linkedlist-的内功心法" aria-hidden="true">#</a> 二、LinkedList 的内功心法</h3><p>好了，经过我这么样的一个剖白后，大家对我应该已经不陌生了。那么接下来，我给大家展示一下我的内功心法。</p><p>我的内功心法主要是一个私有的静态内部类，叫 Node，也就是节点。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">private</span> <span class="token keyword">static</span> <span class="token keyword">class</span> <span class="token class-name">Node</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">E</span><span class="token punctuation">&gt;</span></span> <span class="token punctuation">{</span>
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clickable"><!----><span class="title">2.1 Java概述</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.2 Java基础语法</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.3 面向对象编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.4 字符串&amp;数组</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">2.5 集合框架（容器）</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/collection/gailan.html" class="nav-link sidebar-link sidebar-page" aria-label="概述"><!---->概述<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/collection/arraylist.html" class="nav-link sidebar-link sidebar-page" aria-label="ArrayList"><!---->ArrayList<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/collection/linkedlist.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="LinkedList"><!---->LinkedList<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/collection/linkedlist.html#一、linkedlist-的剖白" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="一、LinkedList 的剖白"><!---->一、LinkedList 的剖白<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/collection/linkedlist.html#二、linkedlist-的内功心法" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="二、LinkedList 的内功心法"><!---->二、LinkedList 的内功心法<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/collection/linkedlist.html#_03、linkedlist-的招式" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="03、LinkedList 的招式"><!---->03、LinkedList 的招式<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/collection/linkedlist.html#四、linkedlist-的挑战" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="四、LinkedList 的挑战"><!---->四、LinkedList 的挑战<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/collection/list-war-2.html" class="nav-link sidebar-link sidebar-page" aria-label="ArrayList和LinkedList的区别"><!---->ArrayList和LinkedList的区别<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/collection/iterator-iterable.html" class="nav-link sidebar-link sidebar-page" aria-label="Iterator和Iterable"><!---->Iterator和Iterable<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/collection/fail-fast.html" class="nav-link sidebar-link sidebar-page" aria-label="fail-fast"><!---->fail-fast<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/collection/hashmap.html" class="nav-link sidebar-link sidebar-page" aria-label="HashMap"><!---->HashMap<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.6 IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.11 并发编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java集合LinkedList详解</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 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class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/collection/linkedlist.html#一、linkedlist-的剖白" class="router-link-active router-link-exact-active toc-link level3">一、LinkedList 的剖白</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/collection/linkedlist.html#二、linkedlist-的内功心法" class="router-link-active router-link-exact-active toc-link level3">二、LinkedList 的内功心法</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/collection/linkedlist.html#_03、linkedlist-的招式" class="router-link-active router-link-exact-active toc-link level3">03、LinkedList 的招式</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/collection/linkedlist.html#四、linkedlist-的挑战" class="router-link-active router-link-exact-active toc-link level3">四、LinkedList 的挑战</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="java集合linkedlist详解" tabindex="-1"><a class="header-anchor" href="#java集合linkedlist详解" aria-hidden="true">#</a> Java集合LinkedList详解</h1><h3 id="一、linkedlist-的剖白" tabindex="-1"><a class="header-anchor" href="#一、linkedlist-的剖白" aria-hidden="true">#</a> 一、LinkedList 的剖白</h3><p>大家好，我是 LinkedList，和 ArrayList 是同门师兄弟，但我俩练的内功却完全不同。师兄练的是动态数组，我练的是链表。</p><p>问大家一个问题，知道我为什么要练链表这门内功吗？</p><p>举个例子来讲吧，假如你们手头要管理一推票据，可能有一张，也可能有一亿张。</p><p>该怎么办呢？</p><p>申请一个 10G 的大数组等着？那万一票据只有 100 张呢？</p><p>申请一个默认大小的数组，随着数据量的增大扩容？要知道扩容是需要重新复制数组的，很耗时间。</p><p>关键是，数组还有一个弊端就是，假如现在有 500 万张票据，现在要从中间删除一个票据，就需要把 250 万张票据往前移动一格。</p><p>遇到这种情况的时候，我师兄几乎情绪崩溃，难受的要命。师父不忍心看到师兄这样痛苦，于是打我进入师门那一天，就强迫我练链表这门内功，一开始我很不理解，害怕师父偏心，不把师门最厉害的内功教我。</p><p>直到有一天，我亲眼目睹师兄差点因为移动数据而走火入魔，我才明白师父的良苦用心。从此以后，我苦练“链表”这门内功，取得了显著的进步，师父和师兄都夸我有天赋。</p><p>链表这门内功大致分为三个层次：</p><ul><li>第一层叫做“单向链表”，我只有一个后指针，指向下一个数据；</li><li>第二层叫做“双向链表”，我有两个指针，后指针指向下一个数据，前指针指向上一个数据。</li><li>第三层叫做“二叉树”，把后指针去掉，换成左右指针。</li></ul><p>但我现在的功力还达不到第三层，不过师父说我有这个潜力，练成神功是早晚的事。</p><h3 id="二、linkedlist-的内功心法" tabindex="-1"><a class="header-anchor" href="#二、linkedlist-的内功心法" aria-hidden="true">#</a> 二、LinkedList 的内功心法</h3><p>好了，经过我这么样的一个剖白后，大家对我应该已经不陌生了。那么接下来，我给大家展示一下我的内功心法。</p><p>我的内功心法主要是一个私有的静态内部类，叫 Node，也就是节点。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">private</span> <span class="token keyword">static</span> <span class="token keyword">class</span> <span class="token class-name">Node</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">E</span><span class="token punctuation">&gt;</span></span> <span class="token punctuation">{</span>
     <span class="token class-name">E</span> item<span class="token punctuation">;</span>
     <span class="token class-name">Node</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">E</span><span class="token punctuation">&gt;</span></span> next<span class="token punctuation">;</span>
     <span class="token class-name">Node</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">E</span><span class="token punctuation">&gt;</span></span> prev<span class="token punctuation">;</span>
@@ -199,6 +199,6 @@ list<span class="token punctuation">.</span><span class="token function">add</sp
     <span class="token keyword">return</span> <span class="token function">node</span><span class="token punctuation">(</span>index<span class="token punctuation">)</span><span class="token punctuation">.</span>item<span class="token punctuation">;</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>其实，查这个招式还可以演化为其他的一些，比如说：</p><ul><li><code>getFirst()</code> 方法用于获取第一个元素；</li><li><code>getLast()</code> 方法用于获取最后一个元素；</li><li><code>poll()</code> 和 <code>pollFirst()</code> 方法用于删除并返回第一个元素（两个方法尽管名字不同，但方法体是完全相同的）；</li><li><code>pollLast()</code> 方法用于删除并返回最后一个元素；</li><li><code>peekFirst()</code> 方法用于返回但不删除第一个元素。</li></ul><h3 id="四、linkedlist-的挑战" tabindex="-1"><a class="header-anchor" href="#四、linkedlist-的挑战" aria-hidden="true">#</a> 四、LinkedList 的挑战</h3><p>说句实在话，我不是很喜欢和师兄 ArrayList 拿来比较，因为我们各自修炼的内功不同，没有孰高孰低。</p><p>虽然师兄经常喊我一声师弟，但我们之间其实挺和谐的。但我知道，在外人眼里，同门师兄弟，总要一较高下的。</p><p>比如说，我们俩在增删改查时候的时间复杂度。</p><p>也许这就是命运吧，从我进入师门的那天起，这种争论就一直没有停息过。</p><p>无论外人怎么看待我们，在我眼里，师兄永远都是一哥，我敬重他，他也愿意保护我。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/collection/linkedlist.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/14 上午7:14:28</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/collection/arraylist.html" class="nav-link prev" aria-label="ArrayList"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->ArrayList</div></a><a href="/collection/list-war-2.html" class="nav-link next" aria-label="ArrayList和LinkedList的区别"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">ArrayList和LinkedList的区别<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java中ArrayList和LinkedList的区别</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 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15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 17 分钟</span><meta property="timeRequired" content="PT17M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/collection/list-war-2.html#_01、arraylist-是如何实现的" class="router-link-active router-link-exact-active toc-link level3">01、ArrayList 是如何实现的？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/collection/list-war-2.html#_02、linkedlist-是如何实现的" class="router-link-active router-link-exact-active toc-link level3">02、LinkedList 是如何实现的？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/collection/list-war-2.html#_03、arraylist-和-linkedlist-新增元素时究竟谁快" class="router-link-active router-link-exact-active toc-link level3">03、ArrayList 和 LinkedList 新增元素时究竟谁快？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/collection/list-war-2.html#_04、arraylist-和-linkedlist-删除元素时究竟谁快" class="router-link-active router-link-exact-active toc-link level3">04、ArrayList 和 LinkedList 删除元素时究竟谁快？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/collection/list-war-2.html#_05、arraylist-和-linkedlist-遍历元素时究竟谁快" class="router-link-active router-link-exact-active toc-link level3">05、ArrayList 和 LinkedList 遍历元素时究竟谁快？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/collection/list-war-2.html#_06、总结" class="router-link-active router-link-exact-active toc-link level3">06、总结</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="java中arraylist和linkedlist的区别" tabindex="-1"><a class="header-anchor" href="#java中arraylist和linkedlist的区别" aria-hidden="true">#</a> Java中ArrayList和LinkedList的区别</h1><h3 id="_01、arraylist-是如何实现的" tabindex="-1"><a class="header-anchor" href="#_01、arraylist-是如何实现的" aria-hidden="true">#</a> 01、ArrayList 是如何实现的？</h3><p>ArrayList 实现了 List 接口，继承了 AbstractList 抽象类。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/collection/list-war-2-01.png" alt=""></p><p>底层是基于数组实现的，并且实现了动态扩容</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">ArrayList</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">E</span><span class="token punctuation">&gt;</span></span> <span class="token keyword">extends</span> <span class="token class-name">AbstractList</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">E</span><span class="token punctuation">&gt;</span></span>
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clickable"><!----><span class="title">2.1 Java概述</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.2 Java基础语法</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.3 面向对象编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.4 字符串&amp;数组</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">2.5 集合框架（容器）</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/collection/gailan.html" class="nav-link sidebar-link sidebar-page" aria-label="概述"><!---->概述<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/collection/arraylist.html" class="nav-link sidebar-link sidebar-page" aria-label="ArrayList"><!---->ArrayList<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/collection/linkedlist.html" class="nav-link sidebar-link sidebar-page" aria-label="LinkedList"><!---->LinkedList<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/collection/list-war-2.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="ArrayList和LinkedList的区别"><!---->ArrayList和LinkedList的区别<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/collection/list-war-2.html#_01、arraylist-是如何实现的" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="01、ArrayList 是如何实现的？"><!---->01、ArrayList 是如何实现的？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/collection/list-war-2.html#_02、linkedlist-是如何实现的" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="02、LinkedList 是如何实现的？"><!---->02、LinkedList 是如何实现的？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/collection/list-war-2.html#_03、arraylist-和-linkedlist-新增元素时究竟谁快" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="03、ArrayList 和 LinkedList 新增元素时究竟谁快？"><!---->03、ArrayList 和 LinkedList 新增元素时究竟谁快？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/collection/list-war-2.html#_04、arraylist-和-linkedlist-删除元素时究竟谁快" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="04、ArrayList 和 LinkedList 删除元素时究竟谁快？"><!---->04、ArrayList 和 LinkedList 删除元素时究竟谁快？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/collection/list-war-2.html#_05、arraylist-和-linkedlist-遍历元素时究竟谁快" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="05、ArrayList 和 LinkedList 遍历元素时究竟谁快？"><!---->05、ArrayList 和 LinkedList 遍历元素时究竟谁快？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/collection/list-war-2.html#_06、总结" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="06、总结"><!---->06、总结<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/collection/iterator-iterable.html" class="nav-link sidebar-link sidebar-page" aria-label="Iterator和Iterable"><!---->Iterator和Iterable<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/collection/fail-fast.html" class="nav-link sidebar-link sidebar-page" aria-label="fail-fast"><!---->fail-fast<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/collection/hashmap.html" class="nav-link sidebar-link sidebar-page" aria-label="HashMap"><!---->HashMap<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.6 IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.11 并发编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java中ArrayList和LinkedList的区别</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2021年10月12日</span><meta property="datePublished" content="2021-10-12T10:51:35.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><meta property="articleSection" content="Java核心"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 17 分钟</span><meta property="timeRequired" content="PT17M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/collection/list-war-2.html#_01、arraylist-是如何实现的" class="router-link-active router-link-exact-active toc-link level3">01、ArrayList 是如何实现的？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/collection/list-war-2.html#_02、linkedlist-是如何实现的" class="router-link-active router-link-exact-active toc-link level3">02、LinkedList 是如何实现的？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/collection/list-war-2.html#_03、arraylist-和-linkedlist-新增元素时究竟谁快" class="router-link-active router-link-exact-active toc-link level3">03、ArrayList 和 LinkedList 新增元素时究竟谁快？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/collection/list-war-2.html#_04、arraylist-和-linkedlist-删除元素时究竟谁快" class="router-link-active router-link-exact-active toc-link level3">04、ArrayList 和 LinkedList 删除元素时究竟谁快？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/collection/list-war-2.html#_05、arraylist-和-linkedlist-遍历元素时究竟谁快" class="router-link-active router-link-exact-active toc-link level3">05、ArrayList 和 LinkedList 遍历元素时究竟谁快？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/collection/list-war-2.html#_06、总结" class="router-link-active router-link-exact-active toc-link level3">06、总结</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="java中arraylist和linkedlist的区别" tabindex="-1"><a class="header-anchor" href="#java中arraylist和linkedlist的区别" aria-hidden="true">#</a> Java中ArrayList和LinkedList的区别</h1><h3 id="_01、arraylist-是如何实现的" tabindex="-1"><a class="header-anchor" href="#_01、arraylist-是如何实现的" aria-hidden="true">#</a> 01、ArrayList 是如何实现的？</h3><p>ArrayList 实现了 List 接口，继承了 AbstractList 抽象类。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/collection/list-war-2-01.png" alt=""></p><p>底层是基于数组实现的，并且实现了动态扩容</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">ArrayList</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">E</span><span class="token punctuation">&gt;</span></span> <span class="token keyword">extends</span> <span class="token class-name">AbstractList</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">E</span><span class="token punctuation">&gt;</span></span>
         <span class="token keyword">implements</span> <span class="token class-name">List</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">E</span><span class="token punctuation">&gt;</span></span><span class="token punctuation">,</span> <span class="token class-name">RandomAccess</span><span class="token punctuation">,</span> <span class="token class-name">Cloneable</span><span class="token punctuation">,</span> <span class="token class-name"><span class="token namespace">java<span class="token punctuation">.</span>io<span class="token punctuation">.</span></span>Serializable</span>
 <span class="token punctuation">{</span>
     <span class="token keyword">private</span> <span class="token keyword">static</span> <span class="token keyword">final</span> <span class="token keyword">int</span> DEFAULT_CAPACITY <span class="token operator">=</span> <span class="token number">10</span><span class="token punctuation">;</span>
@@ -552,6 +552,6 @@ LinkedList从集合尾部位置删除元素花费的时间12
     <span class="token punctuation">}</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>执行 ListItr 的构造方法时调用了一次 <code>node(int)</code> 方法，返回第一个节点。在此之后，迭代器就执行 <code>hasNext()</code> 判断有没有下一个，执行 <code>next()</code> 方法下一个节点。</p><p>由此，可以得出这样的结论：<strong>遍历 LinkedList 的时候，千万不要使用 for 循环，要使用迭代器。</strong></p><p>也就是说，for 循环遍历的时候，ArrayList 花费的时间远小于 LinkedList；迭代器遍历的时候，两者性能差不多。</p><h3 id="_06、总结" tabindex="-1"><a class="header-anchor" href="#_06、总结" aria-hidden="true">#</a> 06、总结</h3><p>花了两天时间，终于肝完了！相信看完这篇文章后，再有面试官问你 ArrayList 和 LinkedList 有什么区别的话，你一定会胸有成竹地和他扯上半小时了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/collection/list-war-2.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/14 上午7:14:28</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/collection/linkedlist.html" class="nav-link prev" aria-label="LinkedList"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->LinkedList</div></a><a href="/collection/iterator-iterable.html" class="nav-link next" aria-label="Iterator和Iterable"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">Iterator和Iterable<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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class="router-link-active router-link-exact-active toc-link level3">09、parallelPrefix</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/common-tool/arrays.html#_10、总结" class="router-link-active router-link-exact-active toc-link level3">10、总结</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="java-arrays工具类10大常用方法" tabindex="-1"><a class="header-anchor" href="#java-arrays工具类10大常用方法" aria-hidden="true">#</a> Java Arrays工具类10大常用方法</h1><p>“哥，数组专用工具类是专门用来操作数组的吗？比如说创建数组、数组排序、数组检索等等。”三妹的提问其实已经把答案说了出来。</p><p>“是滴，这里说的数组专用工具类指的是 <code>java.util.Arrays</code> 类，基本上常见的数组操作，这个类都提供了静态方法可供直接调用。毕竟数组本身想完成这些操作还是挺麻烦的，有了这层封装，就方便多了。”在回答三妹的同时，我打开 Intellij IDEA，找到了 Arrays 类的源码。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">package</span> <span class="token namespace">java<span class="token punctuation">.</span>util</span><span class="token punctuation">;</span>
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right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java Arrays工具类10大常用方法</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 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class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/common-tool/arrays.html#_01、创建数组" class="router-link-active router-link-exact-active toc-link level3">01、创建数组</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/common-tool/arrays.html#_02、比较数组" class="router-link-active router-link-exact-active toc-link level3">02、比较数组</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/common-tool/arrays.html#_03、数组排序" class="router-link-active router-link-exact-active toc-link level3">03、数组排序</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/common-tool/arrays.html#_04、数组检索" class="router-link-active router-link-exact-active toc-link level3">04、数组检索</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/common-tool/arrays.html#_05、数组转流" class="router-link-active router-link-exact-active toc-link level3">05、数组转流</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/common-tool/arrays.html#_06、打印数组" class="router-link-active router-link-exact-active toc-link level3">06、打印数组</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/common-tool/arrays.html#_07、数组转-list" class="router-link-active router-link-exact-active toc-link level3">07、数组转 List</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/common-tool/arrays.html#_08、setall" class="router-link-active router-link-exact-active toc-link level3">08、setAll</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/common-tool/arrays.html#_09、parallelprefix" class="router-link-active router-link-exact-active toc-link level3">09、parallelPrefix</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/common-tool/arrays.html#_10、总结" class="router-link-active router-link-exact-active toc-link level3">10、总结</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="java-arrays工具类10大常用方法" tabindex="-1"><a class="header-anchor" href="#java-arrays工具类10大常用方法" aria-hidden="true">#</a> Java Arrays工具类10大常用方法</h1><p>“哥，数组专用工具类是专门用来操作数组的吗？比如说创建数组、数组排序、数组检索等等。”三妹的提问其实已经把答案说了出来。</p><p>“是滴，这里说的数组专用工具类指的是 <code>java.util.Arrays</code> 类，基本上常见的数组操作，这个类都提供了静态方法可供直接调用。毕竟数组本身想完成这些操作还是挺麻烦的，有了这层封装，就方便多了。”在回答三妹的同时，我打开 Intellij IDEA，找到了 Arrays 类的源码。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">package</span> <span class="token namespace">java<span class="token punctuation">.</span>util</span><span class="token punctuation">;</span>
 <span class="token doc-comment comment">/**
  * <span class="token keyword">@author</span> Josh Bloch
  * <span class="token keyword">@author</span> Neal Gafter
@@ -179,6 +179,6 @@ rets1<span class="token punctuation">.</span><span class="token function">remove
 6，4
 [1, 3, 6, 10]
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>也就是说， Lambda 表达式执行了三次：</p><ul><li>第一次是 1 和 2 相加，结果是 3，替换下标为 1 的位置</li><li>第二次是 3 和 3 相加，结果是 6，也就是第一次的结果和下标为 2 的元素相加的结果</li><li>第三次是 6 和 4 相加，结果是 10，也就是第二次的结果和下标为 3 的元素相加的结果</li></ul><h3 id="_10、总结" tabindex="-1"><a class="header-anchor" href="#_10、总结" aria-hidden="true">#</a> 10、总结</h3><p>“好了，三妹，就先学到这吧。如果你以后翻 Java 源码的时候，只要是用到数组的，尤其是 ArrayList 类，就可以看到 Arrays 类的很多影子。”</p><p>“嗯嗯，我先复习一下这节的内容。哥，你去休息吧。”</p><p>我来到客厅，坐到沙发上，捧起黄永玉先生的《无愁河上的浪荡汉子·八年卷 1》看了起来，津津有味。。。。。。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/common-tool/arrays.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/14 上午7:14:28</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span><!--]--><!--]--></div></footer><nav class="page-nav"><!----><a href="/common-tool/collections.html" class="nav-link next" aria-label="Collections"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">Collections<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java集合框架：Collections工具类</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 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277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2021年10月22日</span><meta property="datePublished" content="2021-10-22T07:22:10.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 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aria-current="page" href="/common-tool/collections.html#_01、排序操作" class="router-link-active router-link-exact-active toc-link level3">01、排序操作</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/common-tool/collections.html#_02、查找操作" class="router-link-active router-link-exact-active toc-link level3">02、查找操作</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/common-tool/collections.html#_03、同步控制" class="router-link-active router-link-exact-active toc-link level3">03、同步控制</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/common-tool/collections.html#_04、不可变集合" class="router-link-active router-link-exact-active toc-link level3">04、不可变集合</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/common-tool/collections.html#_05、其他" class="router-link-active router-link-exact-active toc-link level3">05、其他</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="java集合框架-collections工具类" tabindex="-1"><a class="header-anchor" href="#java集合框架-collections工具类" aria-hidden="true">#</a> Java集合框架：Collections工具类</h1><p>Collections 是 JDK 提供的一个工具类，位于 java.util 包下，提供了一系列的静态方法，方便我们对集合进行各种骚操作，算是集合框架的一个大管家。</p><p>还记得我们前面讲过的 <a href="https://mp.weixin.qq.com/s/9dYmKXEErZbyPJ_GxwWYug" target="_blank" rel="noopener noreferrer">Arrays 工具类<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>吗？可以回去温习下。</p><p>Collections 的用法很简单，在 Intellij IDEA 中敲完 <code>Collections.</code> 之后就可以看到它提供的方法了，大致看一下方法名和参数就能知道这个方法是干嘛的。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/common-tool/collections-01.png" alt=""></p><p>为了节省大家的学习时间，我将这些方法做了一些分类，并列举了一些简单的例子。</p><h3 id="_01、排序操作" tabindex="-1"><a class="header-anchor" href="#_01、排序操作" aria-hidden="true">#</a> 01、排序操作</h3><ul><li><code>reverse(List list)</code>：反转顺序</li><li><code>shuffle(List list)</code>：洗牌，将顺序打乱</li><li><code>sort(List list)</code>：自然升序</li><li><code>sort(List list, Comparator c)</code>：按照自定义的比较器排序</li><li><code>swap(List list, int i, int j)</code>：将 i 和 j 位置的元素交换位置</li></ul><p>来看例子：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">List</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">String</span><span class="token punctuation">&gt;</span></span> list <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">ArrayList</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token punctuation">&gt;</span></span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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clickable"><!----><span class="title">2.1 Java概述</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.2 Java基础语法</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.3 面向对象编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.4 字符串&amp;数组</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.5 集合框架（容器）</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.6 IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">2.8 常用工具类</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/common-tool/arrays.html" class="nav-link sidebar-link sidebar-page" aria-label="Arrays"><!---->Arrays<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/common-tool/collections.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="Collections"><!---->Collections<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/common-tool/collections.html#_01、排序操作" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="01、排序操作"><!---->01、排序操作<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/common-tool/collections.html#_02、查找操作" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="02、查找操作"><!---->02、查找操作<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/common-tool/collections.html#_03、同步控制" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="03、同步控制"><!---->03、同步控制<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/common-tool/collections.html#_04、不可变集合" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="04、不可变集合"><!---->04、不可变集合<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/common-tool/collections.html#_05、其他" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="05、其他"><!---->05、其他<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/common-tool/hutool.html" class="nav-link sidebar-link sidebar-page" aria-label="Hutool"><!---->Hutool<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/common-tool/guava.html" class="nav-link sidebar-link sidebar-page" aria-label="Guava"><!---->Guava<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.11 并发编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java集合框架：Collections工具类</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2021年10月22日</span><meta property="datePublished" content="2021-10-22T07:22:10.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><meta property="articleSection" content="Java核心"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 6 分钟</span><meta property="timeRequired" content="PT6M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/common-tool/collections.html#_01、排序操作" class="router-link-active router-link-exact-active toc-link level3">01、排序操作</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/common-tool/collections.html#_02、查找操作" class="router-link-active router-link-exact-active toc-link level3">02、查找操作</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/common-tool/collections.html#_03、同步控制" class="router-link-active router-link-exact-active toc-link level3">03、同步控制</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/common-tool/collections.html#_04、不可变集合" class="router-link-active router-link-exact-active toc-link level3">04、不可变集合</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/common-tool/collections.html#_05、其他" class="router-link-active router-link-exact-active toc-link level3">05、其他</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="java集合框架-collections工具类" tabindex="-1"><a class="header-anchor" href="#java集合框架-collections工具类" aria-hidden="true">#</a> Java集合框架：Collections工具类</h1><p>Collections 是 JDK 提供的一个工具类，位于 java.util 包下，提供了一系列的静态方法，方便我们对集合进行各种骚操作，算是集合框架的一个大管家。</p><p>还记得我们前面讲过的 <a href="https://mp.weixin.qq.com/s/9dYmKXEErZbyPJ_GxwWYug" target="_blank" rel="noopener noreferrer">Arrays 工具类<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>吗？可以回去温习下。</p><p>Collections 的用法很简单，在 Intellij IDEA 中敲完 <code>Collections.</code> 之后就可以看到它提供的方法了，大致看一下方法名和参数就能知道这个方法是干嘛的。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/common-tool/collections-01.png" alt=""></p><p>为了节省大家的学习时间，我将这些方法做了一些分类，并列举了一些简单的例子。</p><h3 id="_01、排序操作" tabindex="-1"><a class="header-anchor" href="#_01、排序操作" aria-hidden="true">#</a> 01、排序操作</h3><ul><li><code>reverse(List list)</code>：反转顺序</li><li><code>shuffle(List list)</code>：洗牌，将顺序打乱</li><li><code>sort(List list)</code>：自然升序</li><li><code>sort(List list, Comparator c)</code>：按照自定义的比较器排序</li><li><code>swap(List list, int i, int j)</code>：将 i 和 j 位置的元素交换位置</li></ul><p>来看例子：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">List</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">String</span><span class="token punctuation">&gt;</span></span> list <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">ArrayList</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token punctuation">&gt;</span></span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 list<span class="token punctuation">.</span><span class="token function">add</span><span class="token punctuation">(</span><span class="token string">&quot;沉默王二&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 list<span class="token punctuation">.</span><span class="token function">add</span><span class="token punctuation">(</span><span class="token string">&quot;沉默王三&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 list<span class="token punctuation">.</span><span class="token function">add</span><span class="token punctuation">(</span><span class="token string">&quot;沉默王四&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
@@ -162,6 +162,6 @@ emptyList<span class="token punctuation">.</span><span class="token function">ad
 addAll 后：[沉默王九, 沉默王十, 沉默王二]
 是否没有交集：否
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>整体上，Collections 工具类作为集合框架的大管家，提供了一些非常便利的方法供我们调用，也非常容易掌握，没什么难点，看看方法的注释就能大致明白干嘛的。</p><p>不过，工具就放在那里，用是一回事，为什么要这么用就是另外一回事了。能不能提高自己的编码水平，很大程度上取决于你到底有没有去钻一钻源码，看这些设计 JDK 的大师们是如何写代码的，学会一招半式，在工作当中还是能很快脱颖而出的。</p><p>恐怕 JDK 的设计者是这个世界上最好的老师了，文档写得不能再详细了，代码写得不能再优雅了，基本上都达到了性能上的极致。</p><p>可能有人会说，工具类没什么鸟用，不过是调用下方法而已，但这就大错特错了：如果要你来写，你能写出来 Collections 这样一个工具类吗？</p><p>这才是高手要思考的一个问题。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/common-tool/collections.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/14 上午7:14:28</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/common-tool/arrays.html" class="nav-link prev" aria-label="Arrays"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->Arrays</div></a><a href="/common-tool/hutool.html" class="nav-link next" aria-label="Hutool"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">Hutool<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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diff --git a/dist/common-tool/guava.html b/dist/common-tool/guava.html
index 31dd7c62..194917a3 100644
--- a/dist/common-tool/guava.html
+++ b/dist/common-tool/guava.html
@@ -39,10 +39,10 @@
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class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Google开源的Guava工具库，太强大了</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon 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213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 7 分钟</span><meta property="timeRequired" content="PT7M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/common-tool/guava.html#_01、前世今生" class="router-link-active router-link-exact-active toc-link level3">01、前世今生</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/common-tool/guava.html#_02、引入-guava" class="router-link-active router-link-exact-active toc-link level3">02、引入 Guava</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/common-tool/guava.html#_03、基本工具" class="router-link-active router-link-exact-active toc-link level3">03、基本工具</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/common-tool/guava.html#_04、集合" class="router-link-active router-link-exact-active toc-link level3">04、集合</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/common-tool/guava.html#_05、字符串处理" class="router-link-active router-link-exact-active toc-link level3">05、字符串处理</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/common-tool/guava.html#_06、缓存" class="router-link-active router-link-exact-active toc-link level3">06、缓存</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/common-tool/guava.html#_07、尾声" class="router-link-active router-link-exact-active toc-link level3">07、尾声</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="google开源的guava工具库-太强大了" tabindex="-1"><a class="header-anchor" href="#google开源的guava工具库-太强大了" aria-hidden="true">#</a> Google开源的Guava工具库，太强大了</h1><h3 id="_01、前世今生" tabindex="-1"><a class="header-anchor" href="#_01、前世今生" aria-hidden="true">#</a> 01、前世今生</h3><p>你好呀，我是 Guava。</p><p>我由 Google 公司开源，目前在 GitHub 上已经有 39.9k 的铁粉了，由此可以证明我的受欢迎程度。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/common-tool/guava-01.png" alt=""></p><p>我的身体里主要包含有这些常用的模块：集合 [collections] 、缓存 [caching] 、原生类型支持 [primitives support] 、并发库 [concurrency libraries] 、通用注解 [common annotations] 、字符串处理 [string processing] 、I/O 等。新版的 JDK 中已经直接把我引入了，可想而知我有多优秀，忍不住骄傲了。</p><p>这么说吧，学好如何使用我，能让你在编程中变得更快乐，写出更优雅的代码！</p><p><em>PS：star 这种事，只能求，不求没效果😭😭😭。二哥开源的《Java 程序员进阶之路》专栏在 GitHub 上已经收获了 595 枚星标，铁粉们赶紧去点点啦，帮二哥冲 600 star，笔芯</em>！</p><blockquote><p>https://github.com/itwanger/toBeBetterJavaer</p></blockquote><h3 id="_02、引入-guava" tabindex="-1"><a class="header-anchor" href="#_02、引入-guava" aria-hidden="true">#</a> 02、引入 Guava</h3><p>如果你要在 Maven 项目使用我的话，需要先在 pom.xml 文件中引入我的依赖。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
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clickable"><!----><span class="title">2.1 Java概述</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.2 Java基础语法</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.3 面向对象编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.4 字符串&amp;数组</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.5 集合框架（容器）</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.6 IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">2.8 常用工具类</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/common-tool/arrays.html" class="nav-link sidebar-link sidebar-page" aria-label="Arrays"><!---->Arrays<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/common-tool/collections.html" class="nav-link sidebar-link sidebar-page" aria-label="Collections"><!---->Collections<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/common-tool/hutool.html" class="nav-link 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JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Google开源的Guava工具库，太强大了</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 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class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/common-tool/guava.html#_01、前世今生" class="router-link-active router-link-exact-active toc-link level3">01、前世今生</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/common-tool/guava.html#_02、引入-guava" class="router-link-active router-link-exact-active toc-link level3">02、引入 Guava</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/common-tool/guava.html#_03、基本工具" class="router-link-active router-link-exact-active toc-link level3">03、基本工具</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/common-tool/guava.html#_04、集合" class="router-link-active router-link-exact-active toc-link level3">04、集合</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/common-tool/guava.html#_05、字符串处理" class="router-link-active router-link-exact-active toc-link level3">05、字符串处理</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/common-tool/guava.html#_06、缓存" class="router-link-active router-link-exact-active toc-link level3">06、缓存</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/common-tool/guava.html#_07、尾声" class="router-link-active router-link-exact-active toc-link level3">07、尾声</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="google开源的guava工具库-太强大了" tabindex="-1"><a class="header-anchor" href="#google开源的guava工具库-太强大了" aria-hidden="true">#</a> Google开源的Guava工具库，太强大了</h1><h3 id="_01、前世今生" tabindex="-1"><a class="header-anchor" href="#_01、前世今生" aria-hidden="true">#</a> 01、前世今生</h3><p>你好呀，我是 Guava。</p><p>我由 Google 公司开源，目前在 GitHub 上已经有 39.9k 的铁粉了，由此可以证明我的受欢迎程度。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/common-tool/guava-01.png" alt=""></p><p>我的身体里主要包含有这些常用的模块：集合 [collections] 、缓存 [caching] 、原生类型支持 [primitives support] 、并发库 [concurrency libraries] 、通用注解 [common annotations] 、字符串处理 [string processing] 、I/O 等。新版的 JDK 中已经直接把我引入了，可想而知我有多优秀，忍不住骄傲了。</p><p>这么说吧，学好如何使用我，能让你在编程中变得更快乐，写出更优雅的代码！</p><p><em>PS：star 这种事，只能求，不求没效果😭😭😭。二哥开源的《Java 程序员进阶之路》专栏在 GitHub 上已经收获了 595 枚星标，铁粉们赶紧去点点啦，帮二哥冲 600 star，笔芯</em>！</p><blockquote><p>https://github.com/itwanger/toBeBetterJavaer</p></blockquote><h3 id="_02、引入-guava" tabindex="-1"><a class="header-anchor" href="#_02、引入-guava" aria-hidden="true">#</a> 02、引入 Guava</h3><p>如果你要在 Maven 项目使用我的话，需要先在 pom.xml 文件中引入我的依赖。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
     &lt;groupId&gt;com.google.guava&lt;/groupId&gt;
     &lt;artifactId&gt;guava&lt;/artifactId&gt;
     &lt;version&gt;30.1-jre&lt;/version&gt;
@@ -136,6 +136,6 @@ immutableList<span class="token punctuation">.</span><span class="token function
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class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>CacheLoader 中重写了 load 方法，这个方法会在查询缓存没有命中时被调用，我这里直接返回了 null，其实这样会在没有命中时抛出 CacheLoader returned null for key 异常信息。</p><p>MyRemovalListener 作为缓存元素失效时的监听类，在有元素缓存失效时会自动调用 onRemoval 方法，这里需要注意的是这个方法是同步方法，如果这里耗时较长，会阻塞直到处理完成。</p><p>LoadingCache 就是缓存的主要操作对象了，常用的就是其中的 put 和 get 方法了。</p><h3 id="_07、尾声" tabindex="-1"><a class="header-anchor" href="#_07、尾声" aria-hidden="true">#</a> 07、尾声</h3><p>上面介绍了我认为最常用的功能，作为 Google 公司开源的 Java 开发核心库，个人觉得实用性还是很高的（不然呢？嘿嘿嘿）。引入到你的项目后不仅能快速的实现一些开发中常用的功能，而且还可以让代码更加的优雅简洁。</p><p>我觉得适用于每一个 Java 项目，至于其他的一些功能，比如说散列、事件总线、数学运算、反射，就等待你去发掘了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/common-tool/guava-03.png" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/common-tool/guava.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 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Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.11 并发编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Hutool：国产良心工具包，让你的Java变得更甜</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg 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class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><meta property="articleSection" content="Java核心"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 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213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 12 分钟</span><meta property="timeRequired" content="PT12M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/common-tool/hutool.html#_01、引入-hutool" class="router-link-active router-link-exact-active toc-link level3">01、引入 Hutool</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/common-tool/hutool.html#_02、类型转换" class="router-link-active router-link-exact-active toc-link level3">02、类型转换</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/common-tool/hutool.html#_03、日期时间" class="router-link-active router-link-exact-active toc-link level3">03、日期时间</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/common-tool/hutool.html#_04、io-流相关" class="router-link-active router-link-exact-active toc-link level3">04、IO 流相关</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/common-tool/hutool.html#_05、字符串工具" class="router-link-active router-link-exact-active toc-link level3">05、字符串工具</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/common-tool/hutool.html#_06、反射工具" class="router-link-active router-link-exact-active toc-link level3">06、反射工具</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/common-tool/hutool.html#_07、压缩工具" class="router-link-active router-link-exact-active toc-link level3">07、压缩工具</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/common-tool/hutool.html#_08、身份证工具" class="router-link-active router-link-exact-active toc-link level3">08、身份证工具</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/common-tool/hutool.html#_09、扩展-hashmap" class="router-link-active router-link-exact-active toc-link level3">09、扩展 HashMap</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/common-tool/hutool.html#_10、控制台打印" class="router-link-active router-link-exact-active toc-link level3">10、控制台打印</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/common-tool/hutool.html#_11、字段验证器" class="router-link-active router-link-exact-active toc-link level3">11、字段验证器</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/common-tool/hutool.html#_12、双向查找-map" class="router-link-active router-link-exact-active toc-link level3">12、双向查找 Map</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/common-tool/hutool.html#_13、图片工具" class="router-link-active router-link-exact-active toc-link level3">13、图片工具</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/common-tool/hutool.html#_14、配置文件" class="router-link-active router-link-exact-active toc-link level3">14、配置文件</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/common-tool/hutool.html#_15、日志工厂" class="router-link-active router-link-exact-active toc-link level3">15、日志工厂</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/common-tool/hutool.html#_16、缓存工具" class="router-link-active router-link-exact-active toc-link level3">16、缓存工具</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/common-tool/hutool.html#_17、加密解密" class="router-link-active router-link-exact-active toc-link level3">17、加密解密</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/common-tool/hutool.html#_18、其他类库" class="router-link-active router-link-exact-active toc-link level3">18、其他类库</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="hutool-国产良心工具包-让你的java变得更甜" tabindex="-1"><a class="header-anchor" href="#hutool-国产良心工具包-让你的java变得更甜" aria-hidden="true">#</a> Hutool：国产良心工具包，让你的Java变得更甜</h1><p>读者群里有个小伙伴感慨说，“Hutool 这款开源类库太厉害了，基本上该有该的工具类，它里面都有。”讲真的，我平常工作中也经常用 Hutool，它确实可以帮助我们简化每一行代码，使 Java 拥有函数式语言般的优雅，让 Java 语言变得“甜甜的”。</p><p>Hutool 的作者在官网上说，Hutool 是 Hu+tool 的自造词（好像不用说，我们也能猜得到），“Hu”用来致敬他的“前任”公司，“tool”就是工具的意思，谐音就有意思了，“糊涂”，寓意追求“万事都作糊涂观，无所谓失，无所谓得”（一个开源类库，上升到了哲学的高度，作者厉害了）。</p><p>看了一下开发团队的一个成员介绍，一个 Java 后端工具的作者竟然爱前端、爱数码，爱美女，嗯嗯嗯，确实“难得糊涂”（手动狗头）。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/common-tool/hutool-01.png" alt=""></p><p>废话就说到这，来吧，实操走起！</p><h3 id="_01、引入-hutool" tabindex="-1"><a class="header-anchor" href="#_01、引入-hutool" aria-hidden="true">#</a> 01、引入 Hutool</h3><p>Maven 项目只需要在 pom.xml 文件中添加以下依赖即可。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
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clickable"><!----><span class="title">2.1 Java概述</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.2 Java基础语法</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.3 面向对象编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.4 字符串&amp;数组</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.5 集合框架（容器）</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.6 IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">2.8 常用工具类</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/common-tool/arrays.html" class="nav-link sidebar-link sidebar-page" aria-label="Arrays"><!---->Arrays<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/common-tool/collections.html" class="nav-link sidebar-link sidebar-page" aria-label="Collections"><!---->Collections<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/common-tool/hutool.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="Hutool"><!---->Hutool<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/common-tool/hutool.html#_01、引入-hutool" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="01、引入 Hutool"><!---->01、引入 Hutool<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/common-tool/hutool.html#_02、类型转换" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="02、类型转换"><!---->02、类型转换<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/common-tool/hutool.html#_03、日期时间" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="03、日期时间"><!---->03、日期时间<!----></a><ul class="sidebar-sub-headers"></ul></li><li 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aria-label="07、压缩工具"><!---->07、压缩工具<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/common-tool/hutool.html#_08、身份证工具" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="08、身份证工具"><!---->08、身份证工具<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/common-tool/hutool.html#_09、扩展-hashmap" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="09、扩展 HashMap"><!---->09、扩展 HashMap<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/common-tool/hutool.html#_10、控制台打印" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="10、控制台打印"><!---->10、控制台打印<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/common-tool/hutool.html#_11、字段验证器" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="11、字段验证器"><!---->11、字段验证器<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/common-tool/hutool.html#_12、双向查找-map" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="12、双向查找 Map"><!---->12、双向查找 Map<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/common-tool/hutool.html#_13、图片工具" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="13、图片工具"><!---->13、图片工具<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/common-tool/hutool.html#_14、配置文件" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="14、配置文件"><!---->14、配置文件<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/common-tool/hutool.html#_15、日志工厂" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="15、日志工厂"><!---->15、日志工厂<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/common-tool/hutool.html#_16、缓存工具" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="16、缓存工具"><!---->16、缓存工具<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/common-tool/hutool.html#_17、加密解密" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="17、加密解密"><!---->17、加密解密<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/common-tool/hutool.html#_18、其他类库" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="18、其他类库"><!---->18、其他类库<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/common-tool/guava.html" class="nav-link sidebar-link sidebar-page" aria-label="Guava"><!---->Guava<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.11 并发编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Hutool：国产良心工具包，让你的Java变得更甜</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 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12 分钟</span><meta property="timeRequired" content="PT12M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/common-tool/hutool.html#_01、引入-hutool" class="router-link-active router-link-exact-active toc-link level3">01、引入 Hutool</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/common-tool/hutool.html#_02、类型转换" class="router-link-active router-link-exact-active toc-link level3">02、类型转换</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/common-tool/hutool.html#_03、日期时间" class="router-link-active router-link-exact-active toc-link level3">03、日期时间</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/common-tool/hutool.html#_04、io-流相关" class="router-link-active router-link-exact-active toc-link level3">04、IO 流相关</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/common-tool/hutool.html#_05、字符串工具" class="router-link-active router-link-exact-active toc-link level3">05、字符串工具</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/common-tool/hutool.html#_06、反射工具" class="router-link-active router-link-exact-active toc-link level3">06、反射工具</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/common-tool/hutool.html#_07、压缩工具" class="router-link-active router-link-exact-active toc-link level3">07、压缩工具</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/common-tool/hutool.html#_08、身份证工具" class="router-link-active router-link-exact-active toc-link level3">08、身份证工具</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/common-tool/hutool.html#_09、扩展-hashmap" class="router-link-active router-link-exact-active toc-link level3">09、扩展 HashMap</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/common-tool/hutool.html#_10、控制台打印" class="router-link-active router-link-exact-active toc-link level3">10、控制台打印</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/common-tool/hutool.html#_11、字段验证器" class="router-link-active router-link-exact-active toc-link level3">11、字段验证器</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/common-tool/hutool.html#_12、双向查找-map" class="router-link-active router-link-exact-active toc-link level3">12、双向查找 Map</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/common-tool/hutool.html#_13、图片工具" class="router-link-active router-link-exact-active toc-link level3">13、图片工具</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/common-tool/hutool.html#_14、配置文件" class="router-link-active router-link-exact-active toc-link level3">14、配置文件</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/common-tool/hutool.html#_15、日志工厂" class="router-link-active router-link-exact-active toc-link level3">15、日志工厂</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/common-tool/hutool.html#_16、缓存工具" class="router-link-active router-link-exact-active toc-link level3">16、缓存工具</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/common-tool/hutool.html#_17、加密解密" class="router-link-active router-link-exact-active toc-link level3">17、加密解密</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/common-tool/hutool.html#_18、其他类库" class="router-link-active router-link-exact-active toc-link level3">18、其他类库</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="hutool-国产良心工具包-让你的java变得更甜" tabindex="-1"><a class="header-anchor" href="#hutool-国产良心工具包-让你的java变得更甜" aria-hidden="true">#</a> Hutool：国产良心工具包，让你的Java变得更甜</h1><p>读者群里有个小伙伴感慨说，“Hutool 这款开源类库太厉害了，基本上该有该的工具类，它里面都有。”讲真的，我平常工作中也经常用 Hutool，它确实可以帮助我们简化每一行代码，使 Java 拥有函数式语言般的优雅，让 Java 语言变得“甜甜的”。</p><p>Hutool 的作者在官网上说，Hutool 是 Hu+tool 的自造词（好像不用说，我们也能猜得到），“Hu”用来致敬他的“前任”公司，“tool”就是工具的意思，谐音就有意思了，“糊涂”，寓意追求“万事都作糊涂观，无所谓失，无所谓得”（一个开源类库，上升到了哲学的高度，作者厉害了）。</p><p>看了一下开发团队的一个成员介绍，一个 Java 后端工具的作者竟然爱前端、爱数码，爱美女，嗯嗯嗯，确实“难得糊涂”（手动狗头）。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/common-tool/hutool-01.png" alt=""></p><p>废话就说到这，来吧，实操走起！</p><h3 id="_01、引入-hutool" tabindex="-1"><a class="header-anchor" href="#_01、引入-hutool" aria-hidden="true">#</a> 01、引入 Hutool</h3><p>Maven 项目只需要在 pom.xml 文件中添加以下依赖即可。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
     &lt;groupId&gt;cn.hutool&lt;/groupId&gt;
     &lt;artifactId&gt;hutool-all&lt;/artifactId&gt;
     &lt;version&gt;5.4.3&lt;/version&gt;
@@ -258,6 +258,6 @@ lruCache<span class="token punctuation">.</span><span class="token function">put
     <span class="token punctuation">}</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="_18、其他类库" tabindex="-1"><a class="header-anchor" href="#_18、其他类库" aria-hidden="true">#</a> 18、其他类库</h3><p>Hutool 中的类库还有很多，尤其是一些对第三方类库的进一步封装，比如邮件工具 MailUtil，二维码工具 QrCodeUtil，Emoji 工具 EmojiUtil，小伙伴们可以参考 Hutool 的官方文档：https://www.hutool.cn/</p><p>项目源码地址：<a href="https://github.com/looly/hutool" target="_blank" rel="noopener noreferrer">https://github.com/looly/hutool<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png"></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/common-tool/hutool.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/12 下午4:24:21</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/common-tool/collections.html" class="nav-link prev" aria-label="Collections"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->Collections</div></a><a href="/common-tool/guava.html" class="nav-link next" aria-label="Guava"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">Guava<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
-    <script type="module" src="/assets/app.a0271b9c.js" defer></script>
+    <script type="module" src="/assets/app.615e41d8.js" defer></script>
   </body>
 </html>
diff --git a/dist/cs/os.html b/dist/cs/os.html
index 705cf341..67524f29 100644
--- a/dist/cs/os.html
+++ b/dist/cs/os.html
@@ -39,10 +39,10 @@
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     </script>
     <link rel="stylesheet" href="/assets/style.aa7884a9.css">
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+    <link rel="modulepreload" href="/assets/app.615e41d8.js"><link rel="modulepreload" href="/assets/os.html.1d208877.js"><link rel="modulepreload" href="/assets/plugin-vue_export-helper.21dcd24c.js"><link rel="modulepreload" href="/assets/os.html.5e6a959a.js">
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aria-label="一、前言"><!---->一、前言<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">二、Java核心</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">五、计算机基础</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a aria-current="page" href="/cs/os.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="计算机操作系统"><!---->计算机操作系统<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#计算机结构" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="计算机结构"><!---->计算机结构<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#内存" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="内存"><!---->内存<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#cpu" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="CPU"><!---->CPU<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#总线" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="总线"><!---->总线<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#输入、输出设备" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="输入、输出设备"><!---->输入、输出设备<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#基础知识" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="基础知识"><!---->基础知识<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#中断" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="中断"><!---->中断<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#内核态和用户态" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="内核态和用户态"><!---->内核态和用户态<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#线程" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="线程"><!---->线程<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#用户态线程" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="用户态线程"><!---->用户态线程<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#内核态线程" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="内核态线程"><!---->内核态线程<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#协程" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="协程"><!---->协程<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#线程安全" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="线程安全"><!---->线程安全<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#进程" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="进程"><!---->进程<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#创建进程" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="创建进程"><!---->创建进程<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#进程状态" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="进程状态"><!---->进程状态<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#进程间通信ipc" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="进程间通信IPC"><!---->进程间通信IPC<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#信号" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="信号"><!---->信号<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#进程同步" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="进程同步"><!---->进程同步<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#上下文切换" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="上下文切换"><!---->上下文切换<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#进程调度算法" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="进程调度算法"><!---->进程调度算法<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#守护进程" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="守护进程"><!---->守护进程<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#孤儿进程" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="孤儿进程"><!---->孤儿进程<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#僵尸进程" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="僵尸进程"><!---->僵尸进程<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#死锁" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="死锁"><!---->死锁<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#fork函数" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="Fork函数"><!---->Fork函数<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#设备管理" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="设备管理"><!---->设备管理<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#磁盘调度算法" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="磁盘调度算法"><!---->磁盘调度算法<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#内存管理" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="内存管理"><!---->内存管理<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#虚拟地址" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="虚拟地址"><!---->虚拟地址<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#虚拟内存" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="虚拟内存"><!---->虚拟内存<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#缺页中断" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="缺页中断"><!---->缺页中断<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#页面置换算法" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="页面置换算法"><!---->页面置换算法<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#局部性原理-1" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="局部性原理"><!---->局部性原理<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#页表" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="页表"><!---->页表<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#快表" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="快表"><!---->快表<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#内存管理单元" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="内存管理单元"><!---->内存管理单元<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#动态分区分配算法" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="动态分区分配算法"><!---->动态分区分配算法<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#内存覆盖" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="内存覆盖"><!---->内存覆盖<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#内存交换" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="内存交换"><!---->内存交换<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#常见面试题" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="常见面试题"><!---->常见面试题<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/cs/wangluo.html" class="nav-link sidebar-link sidebar-page" aria-label="计算机网络"><!---->计算机网络<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->计算机操作系统知识点大梳理</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><span class="author-item">月伴飞鱼</span></span><span property="author" content="月伴飞鱼"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月31日</span><meta property="datePublished" content="2022-03-31T02:38:06.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category4" role>计算机基础</li><meta property="articleSection" content="计算机基础"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag2" role>操作系统</li></ul><meta property="keywords" content="操作系统"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 72 分钟</span><meta property="timeRequired" content="PT72M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/cs/os.html#计算机结构" class="router-link-active router-link-exact-active toc-link level2">计算机结构</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/cs/os.html#内存" class="router-link-active router-link-exact-active toc-link level3">内存</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cs/os.html#cpu" class="router-link-active router-link-exact-active toc-link level3">CPU</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cs/os.html#总线" class="router-link-active router-link-exact-active toc-link level3">总线</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cs/os.html#输入、输出设备" class="router-link-active router-link-exact-active toc-link level3">输入、输出设备</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cs/os.html#基础知识" class="router-link-active router-link-exact-active toc-link level2">基础知识</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a 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class="router-link-active router-link-exact-active toc-link level3">页表</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cs/os.html#快表" class="router-link-active router-link-exact-active toc-link level3">快表</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cs/os.html#内存管理单元" class="router-link-active router-link-exact-active toc-link level3">内存管理单元</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cs/os.html#动态分区分配算法" class="router-link-active router-link-exact-active toc-link level3">动态分区分配算法</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cs/os.html#内存覆盖" class="router-link-active router-link-exact-active toc-link level3">内存覆盖</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cs/os.html#内存交换" class="router-link-active router-link-exact-active toc-link level3">内存交换</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cs/os.html#常见面试题" class="router-link-active router-link-exact-active toc-link level2">常见面试题</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><blockquote><p>作者：月伴飞鱼，转载链接：<a href="https://mp.weixin.qq.com/s/G9ZqwEMxjrG5LbgYwM5ACQ" target="_blank" rel="noopener noreferrer">https://mp.weixin.qq.com/s/G9ZqwEMxjrG5LbgYwM5ACQ<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/os-5ad16ae7-059f-44f1-8236-697b203bb72e.png" alt=""></p><h2 id="计算机结构" tabindex="-1"><a class="header-anchor" href="#计算机结构" aria-hidden="true">#</a> 计算机结构</h2><p>现代计算机模型是基于-<strong>冯诺依曼计算机模型</strong></p><p>计算机在运行时，先从内存中取出第一条指令，通过控制器的译码，按指令的要求，从存储器中取出数据进行指定的运算和逻辑操作等加工，然后再按地址把结果送到内存中去，接下来，再取出第二条指令，在控制器的指挥下完成规定操作，依此进行下去。直至遇到停止指令</p><p>程序与数据一样存贮，按程序编排的顺序，一步一步地取出指令，自动地完成指令规定的操作是计算机最基本的工作模型</p><p><strong>计算机五大核心组成部分</strong></p><p>控制器：是整个计算机的中枢神经，其功能是对程序规定的控制信息进行解释，根据其要求进行控制，调度程序、数据、地址，协调计算机各部分工作及内存与外设的访问等。</p><p>运算器：运算器的功能是对数据进行各种算术运算和逻辑运算，即对数据进行加工处理。</p><p>存储器：存储器的功能是存储程序、数据和各种信号、命令等信息，并在需要时提供这些信息。</p><p>输入：输入设备是计算机的重要组成部分，输入设备与输出设备合你为外部设备，简称外设，输入设备的作用是将程序、原始数据、文字、字符、控制命令或现场采集的数据等信息输入到计算机。</p><blockquote><p>常见的输入设备有键盘、鼠标器、光电输入机、磁带机、磁盘机、光盘机等。</p></blockquote><p>输出：输出设备与输入设备同样是计算机的重要组成部分，它把外算机的中间结果或最后结果、机内的各种数据符号及文字或各种控制信号等信息输出出来，微机常用的输出设备有显示终端CRT、打印机、激光印字机、绘图仪及磁带、光盘机等。</p><p><strong>计算机结构分成以下 5 个部分：</strong></p><p>输入设备；输出设备；内存；中央处理器；总线。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/os-eff4b87b-9091-443c-988b-721e9fd59d2f.png" alt=""></p><h3 id="内存" tabindex="-1"><a class="header-anchor" href="#内存" aria-hidden="true">#</a> 内存</h3><p>在冯诺依曼模型中，程序和数据被存储在一个被称作内存的线性排列存储区域。</p><p>存储的数据单位是一个二进制位，英文是 bit，最小的存储单位叫作字节，也就是 8 位，英文是 byte，每一个字节都对应一个内存地址。</p><p>内存地址由 0 开始编号，比如第 1 个地址是 0，第 2 个地址是 1， 然后自增排列，最后一个地址是内存中的字节数减 1。</p><p>我们通常说的内存都是随机存取器，也就是读取任何一个地址数据的速度是一样的，写入任何一个地址数据的速度也是一样的。</p><h3 id="cpu" tabindex="-1"><a class="header-anchor" href="#cpu" aria-hidden="true">#</a> CPU</h3><p>冯诺依曼模型中 CPU 负责控制和计算，为了方便计算较大的数值，CPU 每次可以计算多个字节的数据。</p><ul><li><p>如果 CPU 每次可以计算 4 个 byte，那么我们称作 32 位 CPU；</p></li><li><p>如果 CPU 每次可以计算 8 个 byte，那么我们称作 64 位 CPU。</p></li></ul><p>这里的 32 和 64，称作 CPU 的位宽。</p><p><strong>为什么 CPU 要这样设计呢？</strong></p><p>因为一个 byte 最大的表示范围就是 0~255。</p><p>比如要计算 <code>20000*50</code>，就超出了byte 最大的表示范围了。</p><p>因此，CPU 需要支持多个 byte 一起计算，当然，CPU 位数越大，可以计算的数值就越大，但是在现实生活中不一定需要计算这么大的数值，比如说 32 位 CPU 能计算的最大整数是 4294967295，这已经非常大了。</p><p><strong>控制单元和逻辑运算单元</strong></p><p>CPU 中有一个控制单元专门负责控制 CPU 工作；还有逻辑运算单元专门负责计算。</p><p><strong>寄存器</strong></p><p>CPU 要进行计算，比如最简单的加和两个数字时，因为 CPU 离内存太远，所以需要一种离自己近的存储来存储将要被计算的数字。</p><p>这种存储就是寄存器，寄存器就在 CPU 里，控制单元和逻辑运算单元非常近，因此速度很快。</p><p>常见的寄存器种类：</p><ul><li>通用寄存器，用来存放需要进行运算的数据，比如需要进行加和运算的两个数据。</li><li>程序计数器，用来存储 CPU 要执行下一条指令所在的内存地址，注意不是存储了下一条要执行的指令，此时指令还在内存中，程序计数器只是存储了下一条指令的地址。</li><li>指令寄存器，用来存放程序计数器指向的指令，也就是指令本身，指令被执行完成之前，指令都存储在这里。</li></ul><h4 id="多级缓存" tabindex="-1"><a class="header-anchor" href="#多级缓存" aria-hidden="true">#</a> 多级缓存</h4><p>现代CPU为了提升执行效率，减少CPU与内存的交互(交互影响CPU效率)，一般在CPU上集成了多级缓存架构</p><p><strong>CPU缓存</strong>即高速缓冲存储器，是位于CPU与主内存间的一种容量较小但速度很高的存储器</p><p>由于CPU的速度远高于主内存，CPU直接从内存中存取数据要等待一定时间周期，Cache中保存着CPU刚用过或循环使用的一部分数据，当CPU再次使用该部分数据时可从Cache中直接调用，减少CPU的等待时间，提高了系统的效率，具体包括以下几种：</p><p><strong>L1-Cache</strong></p><p>L1- 缓存在 CPU 中，相比寄存器，虽然它的位置距离 CPU 核心更远，但造价更低，通常 L1-Cache 大小在几十 Kb 到几百 Kb 不等，读写速度在 2~4 个 CPU 时钟周期。</p><p><strong>L2-Cache</strong></p><p>L2- 缓存也在 CPU 中，位置比 L1- 缓存距离 CPU 核心更远，它的大小比 L1-Cache 更大，具体大小要看 CPU 型号，有 2M 的，也有更小或者更大的，速度在 10~20 个 CPU 周期。</p><p><strong>L3-Cache</strong></p><p>L3- 缓存同样在 CPU 中，位置比 L2- 缓存距离 CPU 核心更远，大小通常比 L2-Cache 更大，读写速度在 20~60 个 CPU 周期。</p><p>L3 缓存大小也是看型号的，比如 i9 CPU 有 512KB L1 Cache；有 2MB L2 Cache； 有16MB L3 Cache。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/os-214a4294-df48-4ed4-8f6a-15c93c02037d.png" alt=""></p><p>当 CPU 需要内存中某个数据的时候，如果寄存器中有这个数据，我们可以直接使用；如果寄存器中没有这个数据，我们就要先查询 L1 缓存；L1 中没有，再查询 L2 缓存；L2 中没有再查询 L3 缓存；L3 中没有，再去内存中拿。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/os-936b2476-4704-4928-bfd0-d7417d0f1ab8.png" alt=""></p><p><strong>总结：</strong></p><p>存储器存储空间大小：内存&gt;L3&gt;L2&gt;L1&gt;寄存器；</p><p>存储器速度快慢排序：寄存器&gt;L1&gt;L2&gt;L3&gt;内存；</p><h4 id="安全等级" tabindex="-1"><a class="header-anchor" href="#安全等级" aria-hidden="true">#</a> 安全等级</h4><p><strong>CPU运行安全等级</strong></p><p>CPU有4个运行级别，分别为：</p><ul><li>ring0，ring1，ring2，ring3</li></ul><p>ring0只给操作系统用，ring3谁都能用。</p><p>ring0是指CPU的运行级别，是最高级别，ring1次之，ring2更次之……</p><p>系统（内核）的代码运行在最高运行级别ring0上，可以使用特权指令，控制中断、修改页表、访问设备等等。</p><p>应用程序的代码运行在最低运行级别上ring3上，不能做受控操作。</p><p>如果要做，比如要访问磁盘，写文件，那就要通过执行系统调用（函数），执行系统调用的时候，CPU的运行级别会发生从ring3到ring0的切换，并跳转到系统调用对应的内核代码位置执行，这样内核就为你完成了设备访问，完成之后再从ring0返回ring3。</p><p>这个过程也称作用户态和内核态的切换。</p><h4 id="局部性原理" tabindex="-1"><a class="header-anchor" href="#局部性原理" aria-hidden="true">#</a> 局部性原理</h4><p>在CPU访问存储设备时，无论是存取数据抑或存取指令，都趋于聚集在一片连续的区域中，这就被称为局部性原理</p><p><strong>时间局部性（Temporal Locality）：</strong></p><p>如果一个信息项正在被访问，那么在近期它很可能还会被再次访问。</p><p>比如循环、递归、方法的反复调用等。</p><p><strong>空间局部性（Spatial Locality）：</strong></p><p>如果一个存储器的位置被引用，那么将来他附近的位置也会被引用。</p><p>比如顺序执行的代码、连续创建的两个对象、数组等。</p><h4 id="程序的执行过程" tabindex="-1"><a class="header-anchor" href="#程序的执行过程" aria-hidden="true">#</a> 程序的执行过程</h4><p>程序实际上是一条一条指令，所以程序的运行过程就是把每一条指令一步一步的执行起来，负责执行指令的就是 CPU 了。</p><p><strong>那 CPU 执行程序的过程如下：</strong></p><ul><li>第一步，CPU 读取程序计数器的值，这个值是指令的内存地址，然后 CPU 的控制单元操作地址总线指定需要访问的内存地址，接着通知内存设备准备数据，数据准备好后通过数据总线将指令数据传给 CPU，CPU 收到内存传来的数据后，将这个指令数据存入到指令寄存器。</li><li>第二步，CPU 分析指令寄存器中的指令，确定指令的类型和参数，如果是计算类型的指令，就把指令交给逻辑运算单元运算；如果是存储类型的指令，则交由控制单元执行；</li><li>第三步，CPU 执行完指令后，程序计数器的值自增，表示指向下一条指令。这个自增的大小，由 CPU 的位宽决定，比如 32 位的 CPU，指令是 4 个字节，需要 4 个内存地址存放，因此程序计数器的值会自增 4；</li></ul><p>简单总结一下就是，一个程序执行的时候，CPU 会根据程序计数器里的内存地址，从内存里面把需要执行的指令读取到指令寄存器里面执行，然后根据指令长度自增，开始顺序读取下一条指令。</p><p>CPU 从程序计数器读取指令、到执行、再到下一条指令，这个过程会不断循环，直到程序执行结束，这个不断循环的过程被称为 <strong>CPU 的指令周期</strong>。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/os-0e135ca2-26fa-4495-8a4b-3c9c05a4341e.png" alt=""></p><h3 id="总线" tabindex="-1"><a class="header-anchor" href="#总线" aria-hidden="true">#</a> 总线</h3><p>CPU 和内存以及其他设备之间，也需要通信，因此我们用一种特殊的设备进行控制，就是总线。</p><ul><li>地址总线，用于指定 CPU 将要操作的内存地址；</li><li>数据总线，用于读写内存的数据；</li><li>控制总线，用于发送和接收信号，比如中断、设备复位等信号，CPU 收到信号后自然进行响应，这时也需要控制总线；</li></ul><p>当 CPU 要读写内存数据的时候，一般需要通过两个总线：</p><ul><li>首先要通过地址总线来指定内存的地址；</li><li>再通过数据总线来传输数据；</li></ul><h3 id="输入、输出设备" tabindex="-1"><a class="header-anchor" href="#输入、输出设备" aria-hidden="true">#</a> 输入、输出设备</h3><p>输入设备向计算机输入数据，计算机经过计算，将结果通过输出设备向外界传达。</p><p>如果输入设备、输出设备想要和 CPU 进行交互，比如说用户按键需要 CPU 响应，这时候就需要用到控制总线。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><h2 id="基础知识" tabindex="-1"><a class="header-anchor" href="#基础知识" aria-hidden="true">#</a> 基础知识</h2><h3 id="中断" tabindex="-1"><a class="header-anchor" href="#中断" aria-hidden="true">#</a> 中断</h3><p><strong>中断的类型</strong></p><ul><li><p>按照中断的触发方分成同步中断和异步中断；</p></li><li><p>根据中断是否强制触发分成可屏蔽中断和不可屏蔽中断。</p></li></ul><p>中断可以由 CPU 指令直接触发，这种主动触发的中断，叫作同步中断。</p><blockquote><p>同步中断有几种情况。</p></blockquote><ul><li><p>比如系统调用，需要从用户态切换内核态，这种情况需要程序触发一个中断，叫作陷阱（Trap），中断触发后需要继续执行系统调用。</p></li><li><p>还有一种同步中断情况是错误（Fault），通常是因为检测到某种错误，需要触发一个中断，中断响应结束后，会重新执行触发错误的地方，比如后面我们要学习的缺页中断。</p></li><li><p>最后还有一种情况是程序的异常，这种情况和 Trap 类似，用于实现程序抛出的异常。</p></li></ul><p>另一部分中断不是由 CPU 直接触发，是因为需要响应外部的通知，比如响应键盘、鼠标等设备而触发的中断，这种中断我们称为异步中断。</p><p>CPU 通常都支持设置一个中断屏蔽位（一个寄存器），设置为 1 之后 CPU 暂时就不再响应中断。</p><p>对于键盘鼠标输入，比如陷阱、错误、异常等情况，会被临时屏蔽。</p><p>但是对于一些特别重要的中断，比如 CPU 故障导致的掉电中断，还是会正常触发。</p><p><strong>可以被屏蔽的中断我们称为可屏蔽中断，多数中断都是可屏蔽中断。</strong></p><h3 id="内核态和用户态" tabindex="-1"><a class="header-anchor" href="#内核态和用户态" aria-hidden="true">#</a> 内核态和用户态</h3><p><strong>什么是用户态和内核态</strong></p><p>Kernel 运行在超级权限模式下，所以拥有很高的权限。</p><p>按照权限管理的原则，多数应用程序应该运行在最小权限下。</p><p>因此，很多操作系统，将内存分成了两个区域：</p><ul><li><p>内核空间（Kernal Space），这个空间只有内核程序可以访问；</p></li><li><p>用户空间（User Space），这部分内存专门给应用程序使用。</p></li></ul><p>用户空间中的代码被限制了只能使用一个局部的内存空间，我们说这些程序在用户态 执行。</p><p>内核空间中的代码可以访问所有内存，我们称这些程序在内核态 执行。</p><blockquote><p>按照级别分：</p></blockquote><p>当程序运行在0级特权级上时，就可以称之为运行在内核态</p><p>当程序运行在3级特权级上时，就可以称之为运行在用户态</p><p>运行在用户态下的程序不能直接访问操作系统内核数据结构和程序。</p><p>当我们在系统中执行一个程序时，大部分时间是运行在用户态下的，在其需要操作系统帮助完成某些它没有权力和能力完成的工作时就会切换到内核态（比如操作硬件）</p><p><strong>这两种状态的主要差别</strong></p><p>处于用户态执行时，进程所能访问的内存空间和对象受到限制，其所处于占有的处理器是可被抢占的</p><p>处于内核态执行时，则能访问所有的内存空间和对象，且所占有的处理器是不允许被抢占的。</p><p><strong>为什么要有用户态和内核态</strong></p><p>由于需要限制不同的程序之间的访问能力，防止他们获取别的程序的内存数据，或者获取外围设备的数据，并发送到网络</p><p><strong>用户态与内核态的切换</strong></p><p>所有用户程序都是运行在用户态的，但是有时候程序确实需要做一些内核态的事情， 例如从硬盘读取数据，或者从键盘获取输入等，而唯一可以做这些事情的就是操作系统，所以此时程序就需要先操作系统请求以程序的名义来执行这些操作</p><p><strong>用户态和内核态的转换</strong></p><blockquote><p>系统调用</p></blockquote><p>用户态进程通过系统调用申请使用操作系统提供的服务程序完成工作，比如fork()实际上就是执行了一个创建新进程的系统调用</p><p>而系统调用的机制其核心还是使用了操作系统为用户特别开放的一个中断来实现，例如Linux的int 80h中断</p><p><strong>举例：</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/os-29b6f34f-a8b3-48ec-8e5c-aea1036ea16a.png" alt=""></p><p>如上图所示：内核程序执行在内核态（Kernal Mode），用户程序执行在用户态（User Mode）。</p><p>当发生系统调用时，用户态的程序发起系统调用，因为系统调用中牵扯特权指令，用户态程序权限不足，因此会中断执行，也就是 Trap（Trap 是一种中断）。</p><p>发生中断后，当前 CPU 执行的程序会中断，跳转到中断处理程序，内核程序开始执行，也就是开始处理系统调用。</p><p>内核处理完成后，主动触发 Trap，这样会再次发生中断，切换回用户态工作。</p><blockquote><p>异常</p></blockquote><p>当CPU在执行运行在用户态下的程序时，发生了某些事先不可知的异常，这时会触发由当前运行进程切换到处理此异常的内核相关程序中，也就转到了内核态，比如缺页异常</p><blockquote><p>外围设备的中断</p></blockquote><p>当外围设备完成用户请求的操作后，会向CPU发出相应的中断信号，这时CPU会暂停执行下一条即将要执行的指令转而去执行与中断信号对应的处理程序，如果先前执行的指令是用户态下的程序，那么这个转换的过程自然也就发生了由用户态到内核态的切换</p><p>比如硬盘读写操作完成，系统会切换到硬盘读写的中断处理程序中执行后续操作等</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><h2 id="线程" tabindex="-1"><a class="header-anchor" href="#线程" aria-hidden="true">#</a> 线程</h2><p>线程：系统分配处理器时间资源的基本单元，是程序执行的最小单位</p><p>线程可以看做轻量级的进程，共享内存空间，每个线程都有自己独立的运行栈和程序计数器，线程之间切换的开销小。</p><p>在同一个进程（程序）中有多个线程同时执行（通过CPU调度，在每个时间片中只有一个线程执行）</p><p>进程可以通过 API 创建用户态的线程，也可以通过系统调用创建内核态的线程。</p><h3 id="用户态线程" tabindex="-1"><a class="header-anchor" href="#用户态线程" aria-hidden="true">#</a> 用户态线程</h3><p>用户态线程也称作用户级线程，操作系统内核并不知道它的存在，它完全是在用户空间中创建。</p><p>用户级线程有很多优势，比如：</p><ul><li><p>管理开销小：创建、销毁不需要系统调用。</p></li><li><p>切换成本低：用户空间程序可以自己维护，不需要走操作系统调度。</p></li></ul><p>但是这种线程也有很多的缺点：</p><ul><li><p>与内核协作成本高：比如这种线程完全是用户空间程序在管理，当它进行 I/O 的时候，无法利用到内核的优势，需要频繁进行用户态到内核态的切换。</p></li><li><p>线程间协作成本高：设想两个线程需要通信，通信需要 I/O，I/O 需要系统调用，因此用户态线程需要额外的系统调用成本。</p></li><li><p>无法利用多核优势：比如操作系统调度的仍然是这个线程所属的进程，所以无论每次一个进程有多少用户态的线程，都只能并发执行一个线程，因此一个进程的多个线程无法利用多核的优势。</p></li></ul><p>操作系统无法针对线程调度进行优化：当一个进程的一个用户态线程阻塞（Block）了，操作系统无法及时发现和处理阻塞问题，它不会更换执行其他线程，从而造成资源浪费。</p><h3 id="内核态线程" tabindex="-1"><a class="header-anchor" href="#内核态线程" aria-hidden="true">#</a> 内核态线程</h3><p>内核态线程也称作内核级线程（Kernel Level Thread），这种线程执行在内核态，可以通过系统调用创造一个内核级线程。</p><p>内核级线程有很多优势：</p><ul><li><p>可以利用多核 CPU 优势：内核拥有较高权限，因此可以在多个 CPU 核心上执行内核线程。</p></li><li><p>操作系统级优化：内核中的线程操作 I/O 不需要进行系统调用；一个内核线程阻塞了，可以立即让另一个执行。</p></li></ul><p>当然内核线程也有一些缺点：</p><ul><li><p>创建成本高：创建的时候需要系统调用，也就是切换到内核态。</p></li><li><p>扩展性差：由一个内核程序管理，不可能数量太多。</p></li><li><p>切换成本较高：切换的时候，也同样存在需要内核操作，需要切换内核态。</p></li></ul><p><strong>用户态线程和内核态线程之间的映射关系</strong></p><p>如果有一个用户态的进程，它下面有多个线程，如果这个进程想要执行下面的某一个线程，应该如何做呢？</p><blockquote><p>这时，比较常见的一种方式，就是将需要执行的程序，让一个内核线程去执行。</p></blockquote><p>毕竟，内核线程是真正的线程，因为它会分配到 CPU 的执行资源。</p><p>如果一个进程所有的线程都要自己调度，相当于在进程的主线程中实现分时算法调度每一个线程，也就是所有线程都用操作系统分配给主线程的时间片段执行。</p><blockquote><p>这种做法，相当于操作系统调度进程的主线程；进程的主线程进行二级调度，调度自己内部的线程。</p></blockquote><p>这样操作劣势非常明显，比如无法利用多核优势，每个线程调度分配到的时间较少，而且这种线程在阻塞场景下会直接交出整个进程的执行权限。</p><p>由此可见，用户态线程创建成本低，问题明显，不可以利用多核。</p><p>内核态线程，创建成本高，可以利用多核，切换速度慢。</p><p>因此通常我们会在内核中预先创建一些线程，并反复利用这些线程。</p><h3 id="协程" tabindex="-1"><a class="header-anchor" href="#协程" aria-hidden="true">#</a> 协程</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/os-586071a1-3d5f-4873-963f-d47b8aeea594.png" alt=""></p><p>协程，是一种比线程更加轻量级的存在，协程不是被操作系统内核所管理，而完全是由程序所控制（也就是在用户态执行）。</p><p>这样带来的好处就是性能得到了很大的提升，不会像线程切换那样消耗资源。</p><p><strong>子程序</strong></p><p>或者称为函数，在所有语言中都是层级调用，比如A调用B，B在执行过程中又调用了C，C执行完毕返回，B执行完毕返回，最后是A执行完毕。</p><p>所以子程序调用是通过栈实现的，一个线程就是执行一个子程序。</p><p>子程序调用总是一个入口，一次返回，调用顺序是明确的。</p><p><strong>协程的特点在于是一个线程执行，那和多线程比，协程有何优势？</strong></p><ul><li>极高的执行效率：因为子程序切换不是线程切换，而是由程序自身控制，因此，没有线程切换的开销，和多线程比，线程数量越多，协程的性能优势就越明显；</li><li>不需要多线程的锁机制：因为只有一个线程，也不存在同时写变量冲突，在协程中控制共享资源不加锁，只需要判断状态就好了，所以执行效率比多线程高很多。</li></ul><h3 id="线程安全" tabindex="-1"><a class="header-anchor" href="#线程安全" aria-hidden="true">#</a> 线程安全</h3><p>如果你的代码所在的进程中有多个线程在同时运行，而这些线程可能会同时运行这段代码。</p><p>如果每次运行结果和单线程运行的结果是一样的，而且其他的变量的值也和预期的是一样的，就是线程安全的。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><h2 id="进程" tabindex="-1"><a class="header-anchor" href="#进程" aria-hidden="true">#</a> 进程</h2><p>在系统中正在运行的一个应用程序；程序一旦运行就是进程；是资源分配的最小单位。</p><p>在操作系统中能同时运行多个进程；</p><p>开机的时候，磁盘的内核镜像被导入内存作为一个执行副本，成为内核进程。</p><p>进程可以分成<strong>用户态进程和内核态进程</strong>两类，用户态进程通常是应用程序的副本，内核态进程就是内核本身的进程。</p><p>如果用户态进程需要申请资源，比如内存，可以通过系统调用向内核申请。</p><p>每个进程都有独立的内存空间，存放代码和数据段等，程序之间的切换会有较大的开销；</p><p><strong>分时和调度</strong></p><p>每个进程在执行时都会获得操作系统分配的一个时间片段，如果超出这个时间，就会轮到下一个进程（线程）执行。</p><blockquote><p>注意，现代操作系统都是直接调度线程，不会调度进程。</p></blockquote><p><strong>分配时间片段</strong></p><p>如下图所示，进程 1 需要 2 个时间片段，进程 2 只有 1 个时间片段，进程 3 需要 3 个时间片段。</p><p>因此当进程 1 执行到一半时，会先挂起，然后进程 2 开始执行；进程 2 一次可以执行完，然后进程 3 开始执行，不过进程 3 一次执行不完，在执行了 1 个时间片段后，进程 1 开始执行；就这样如此周而复始，这个就是分时技术。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/os-606eb7bd-e9e1-457a-bf61-66b152c5ada5.png" alt=""></p><h3 id="创建进程" tabindex="-1"><a class="header-anchor" href="#创建进程" aria-hidden="true">#</a> 创建进程</h3><p>用户想要创建一个进程，最直接的方法就是从命令行执行一个程序，或者双击打开一个应用，但对于程序员而言，显然需要更好的设计。</p><p>首先，应该有 API 打开应用，比如可以通过函数打开某个应用；</p><p>另一方面，如果程序员希望执行完一段代价昂贵的初始化过程后，将当前程序的状态复制好几份，变成一个个单独执行的进程，那么操作系统提供了 fork 指令。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/os-85a86f1b-eeff-401e-8bfe-19e5509e2a53.png" alt=""></p><p>也就是说，每次 fork 会多创造一个克隆的进程，这个克隆的进程，所有状态都和原来的进程一样，但是会有自己的地址空间。</p><p>如果要创造 2 个克隆进程，就要 fork 两次。</p><blockquote><p>那如果我就是想启动一个新的程序呢？</p></blockquote><p>操作系统提供了启动新程序的 API。</p><p>如果我就是想用一个新进程执行一小段程序，比如说每次服务端收到客户端的请求时，我都想用一个进程去处理这个请求。</p><p>如果是这种情况，建议你不要单独启动进程，而是使用线程。</p><p>因为进程的创建成本实在太高了，因此不建议用来做这样的事情：要创建条目、要分配内存，特别是还要在内存中形成一个个段，分成不同的区域。所以通常，我们更倾向于多创建线程。</p><p>不同程序语言会自己提供创建线程的 API，比如 Java 有 Thread 类；go 有 go-routine（注意不是协程，是线程）。</p><h3 id="进程状态" tabindex="-1"><a class="header-anchor" href="#进程状态" aria-hidden="true">#</a> 进程状态</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/os-5f202fa5-0922-4b41-b4f2-f8a9af37a176.png" alt=""></p><p><strong>创建状态</strong></p><p>进程由创建而产生，创建进程是一个非常复杂的过程，一般需要通过多个步骤才能完成：如首先由进程申请一个空白的进程控制块(PCB)，并向PCB中填写用于控制和管理进程的信息；然后为该进程分配运行时所必须的资源；最后，把该进程转入就绪状态并插入到就绪队列中</p><p><strong>就绪状态</strong></p><p>这是指进程已经准备好运行的状态，即进程已分配到除CPU以外所有的必要资源后，只要再获得CPU，便可立即执行，如果系统中有许多处于就绪状态的进程，通常将它们按照一定的策略排成一个队列，该队列称为就绪队列，有执行资格，没有执行权的进程</p><p><strong>运行状态</strong></p><p>这里指进程已经获取CPU，其进程处于正在执行的状态。对任何一个时刻而言，在单处理机的系统中，只有一个进程处于执行状态而在多处理机系统中，有多个进程处于执行状态，既有执行资格，又有执行权的进程</p><p><strong>阻塞状态</strong></p><p>这里是指正在执行的进程由于发生某事件（如I/O请求、申请缓冲区失败等）暂时无法继续执行的状态，即进程执行受到阻塞，此时引起进程调度，操作系统把处理机分配给另外一个就绪的进程，而让受阻的进程处于暂停的状态，一般将这个暂停状态称为阻塞状态</p><p><strong>终止状态</strong></p><h3 id="进程间通信ipc" tabindex="-1"><a class="header-anchor" href="#进程间通信ipc" aria-hidden="true">#</a> 进程间通信IPC</h3><p>每个进程各自有不同的用户地址空间，任何一个进程的全局变量在另一个进程中都看不到，所以进程之间要交换数据必须通过内核，在内核中开辟一块缓冲区，进程1把数据从用户空间拷到内核缓冲区，进程2再从内核缓冲区把数据读走，内核提供的这种机制称为进程间通信</p><p><strong>管道/匿名管道</strong></p><p>管道是半双工的，数据只能向一个方向流动；需要双方通信时，需要建立起两个管道。</p><ul><li><p>只能用于父子进程或者兄弟进程之间(具有亲缘关系的进程);</p></li><li><p>单独构成一种独立的文件系统：管道对于管道两端的进程而言，就是一个文件，但它不是普通的文件，它不属于某种文件系统，而是自立门户，单独构成一种文件系统，并且只存在与内存中。</p></li><li><p>数据的读出和写入：一个进程向管道中写的内容被管道另一端的进程读出，写入的内容每次都添加在管道缓冲区的末尾，并且每次都是从缓冲区的头部读出数据。</p></li></ul><p><strong>有名管道(FIFO)</strong></p><p>匿名管道，由于没有名字，只能用于亲缘关系的进程间通信。</p><p>为了克服这个缺点，提出了有名管道(FIFO)。</p><p>有名管道不同于匿名管道之处在于它提供了一个路径名与之关联，以有名管道的文件形式存在于文件系统中，这样，即使与有名管道的创建进程不存在亲缘关系的进程，只要可以访问该路径，就能够彼此通过有名管道相互通信，因此，通过有名管道不相关的进程也能交换数据。</p><p><strong>信号</strong></p><p>信号是Linux系统中用于进程间互相通信或者操作的一种机制，信号可以在任何时候发给某一进程，而无需知道该进程的状态。</p><p>如果该进程当前并未处于执行状态，则该信号就有内核保存起来，知道该进程回复执行并传递给它为止。</p><p>如果一个信号被进程设置为阻塞，则该信号的传递被延迟，直到其阻塞被取消是才被传递给进程。</p><p><strong>消息队列</strong></p><p>消息队列是存放在内核中的消息链表，每个消息队列由消息队列标识符表示。</p><p>与管道（无名管道：只存在于内存中的文件；命名管道：存在于实际的磁盘介质或者文件系统）不同的是消息队列存放在内核中，只有在内核重启(即操作系统重启)或者显示地删除一个消息队列时，该消息队列才会被真正的删除。</p><p>另外与管道不同的是，消息队列在某个进程往一个队列写入消息之前，并不需要另外某个进程在该队列上等待消息的到达</p><p><strong>共享内存</strong></p><p>使得多个进程可以直接读写同一块内存空间，是最快的可用IPC形式，是针对其他通信机制运行效率较低而设计的。</p><p>为了在多个进程间交换信息，内核专门留出了一块内存区，可以由需要访问的进程将其映射到自己的私有地址空间，进程就可以直接读写这一块内存而不需要进行数据的拷贝，从而大大提高效率。</p><p>由于多个进程共享一段内存，因此需要依靠某种同步机制（如信号量）来达到进程间的同步及互斥。</p><p>共享内存示意图：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/os-8644f82a-eda6-4abf-b86a-13c02e7af5fd.png" alt=""></p><p>一旦这样的内存映射到共享它的进程的地址空间，这些进程间数据传递不再涉及到内核，换句话说是进程不再通过执行进入内核的系统调用来传递彼此的数据。</p><p><strong>信号量</strong></p><p>信号量是一个计数器，用于多进程对共享数据的访问，信号量的意图在于进程间同步。</p><p>为了获得共享资源，进程需要执行下列操作：</p><ol><li><p>创建一个信号量：这要求调用者指定初始值，对于二值信号量来说，它通常是1，也可是0。</p></li><li><p>等待一个信号量：该操作会测试这个信号量的值，如果小于0，就阻塞，也称为P操作。</p></li><li><p>挂出一个信号量：该操作将信号量的值加1，也称为V操作。</p></li></ol><p><strong>套接字(Socket)</strong></p><p>套接字是一种通信机制，凭借这种机制，客户/服务器（即要进行通信的进程）系统的开发工作既可以在本地单机上进行，也可以跨网络进行。也就是说它可以让不在同一台计算机但通过网络连接计算机上的进程进行通信。</p><h3 id="信号" tabindex="-1"><a class="header-anchor" href="#信号" aria-hidden="true">#</a> 信号</h3><p>信号是进程间通信机制中唯一的异步通信机制，可以看作是异步通知，通知接收信号的进程有哪些事情发生了。</p><p>也可以简单理解为信号是某种形式上的软中断</p><p>可运行<code>kill -l</code>查看Linux支持的信号列表：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>kill -l
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clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">五、计算机基础</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a aria-current="page" href="/cs/os.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="计算机操作系统"><!---->计算机操作系统<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#计算机结构" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="计算机结构"><!---->计算机结构<!----></a><ul class="sidebar-sub-headers"><li 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aria-current="page" href="/cs/os.html#用户态线程" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="用户态线程"><!---->用户态线程<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#内核态线程" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="内核态线程"><!---->内核态线程<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#协程" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="协程"><!---->协程<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#线程安全" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="线程安全"><!---->线程安全<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#进程" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="进程"><!---->进程<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#创建进程" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="创建进程"><!---->创建进程<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#进程状态" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="进程状态"><!---->进程状态<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#进程间通信ipc" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="进程间通信IPC"><!---->进程间通信IPC<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#信号" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="信号"><!---->信号<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#进程同步" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="进程同步"><!---->进程同步<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#上下文切换" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="上下文切换"><!---->上下文切换<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#进程调度算法" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="进程调度算法"><!---->进程调度算法<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#守护进程" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="守护进程"><!---->守护进程<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#孤儿进程" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="孤儿进程"><!---->孤儿进程<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#僵尸进程" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="僵尸进程"><!---->僵尸进程<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#死锁" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="死锁"><!---->死锁<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#fork函数" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="Fork函数"><!---->Fork函数<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#设备管理" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="设备管理"><!---->设备管理<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#磁盘调度算法" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="磁盘调度算法"><!---->磁盘调度算法<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#内存管理" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="内存管理"><!---->内存管理<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#虚拟地址" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="虚拟地址"><!---->虚拟地址<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#虚拟内存" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="虚拟内存"><!---->虚拟内存<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#缺页中断" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="缺页中断"><!---->缺页中断<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#页面置换算法" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="页面置换算法"><!---->页面置换算法<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#局部性原理-1" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="局部性原理"><!---->局部性原理<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#页表" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="页表"><!---->页表<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#快表" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="快表"><!---->快表<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#内存管理单元" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="内存管理单元"><!---->内存管理单元<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#动态分区分配算法" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="动态分区分配算法"><!---->动态分区分配算法<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#内存覆盖" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="内存覆盖"><!---->内存覆盖<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#内存交换" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="内存交换"><!---->内存交换<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/os.html#常见面试题" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="常见面试题"><!---->常见面试题<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/cs/wangluo.html" class="nav-link sidebar-link sidebar-page" aria-label="计算机网络"><!---->计算机网络<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->计算机操作系统知识点大梳理</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><span class="author-item">月伴飞鱼</span></span><span property="author" content="月伴飞鱼"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月31日</span><meta property="datePublished" content="2022-03-31T02:38:06.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon 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37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category4" role>计算机基础</li><meta property="articleSection" content="计算机基础"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag2" role>操作系统</li></ul><meta 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href="/cs/os.html#动态分区分配算法" class="router-link-active router-link-exact-active toc-link level3">动态分区分配算法</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cs/os.html#内存覆盖" class="router-link-active router-link-exact-active toc-link level3">内存覆盖</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cs/os.html#内存交换" class="router-link-active router-link-exact-active toc-link level3">内存交换</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cs/os.html#常见面试题" class="router-link-active router-link-exact-active toc-link level2">常见面试题</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><blockquote><p>作者：月伴飞鱼，转载链接：<a href="https://mp.weixin.qq.com/s/G9ZqwEMxjrG5LbgYwM5ACQ" target="_blank" rel="noopener noreferrer">https://mp.weixin.qq.com/s/G9ZqwEMxjrG5LbgYwM5ACQ<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/os-5ad16ae7-059f-44f1-8236-697b203bb72e.png" alt=""></p><h2 id="计算机结构" tabindex="-1"><a class="header-anchor" href="#计算机结构" aria-hidden="true">#</a> 计算机结构</h2><p>现代计算机模型是基于-<strong>冯诺依曼计算机模型</strong></p><p>计算机在运行时，先从内存中取出第一条指令，通过控制器的译码，按指令的要求，从存储器中取出数据进行指定的运算和逻辑操作等加工，然后再按地址把结果送到内存中去，接下来，再取出第二条指令，在控制器的指挥下完成规定操作，依此进行下去。直至遇到停止指令</p><p>程序与数据一样存贮，按程序编排的顺序，一步一步地取出指令，自动地完成指令规定的操作是计算机最基本的工作模型</p><p><strong>计算机五大核心组成部分</strong></p><p>控制器：是整个计算机的中枢神经，其功能是对程序规定的控制信息进行解释，根据其要求进行控制，调度程序、数据、地址，协调计算机各部分工作及内存与外设的访问等。</p><p>运算器：运算器的功能是对数据进行各种算术运算和逻辑运算，即对数据进行加工处理。</p><p>存储器：存储器的功能是存储程序、数据和各种信号、命令等信息，并在需要时提供这些信息。</p><p>输入：输入设备是计算机的重要组成部分，输入设备与输出设备合你为外部设备，简称外设，输入设备的作用是将程序、原始数据、文字、字符、控制命令或现场采集的数据等信息输入到计算机。</p><blockquote><p>常见的输入设备有键盘、鼠标器、光电输入机、磁带机、磁盘机、光盘机等。</p></blockquote><p>输出：输出设备与输入设备同样是计算机的重要组成部分，它把外算机的中间结果或最后结果、机内的各种数据符号及文字或各种控制信号等信息输出出来，微机常用的输出设备有显示终端CRT、打印机、激光印字机、绘图仪及磁带、光盘机等。</p><p><strong>计算机结构分成以下 5 个部分：</strong></p><p>输入设备；输出设备；内存；中央处理器；总线。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/os-eff4b87b-9091-443c-988b-721e9fd59d2f.png" alt=""></p><h3 id="内存" tabindex="-1"><a class="header-anchor" href="#内存" aria-hidden="true">#</a> 内存</h3><p>在冯诺依曼模型中，程序和数据被存储在一个被称作内存的线性排列存储区域。</p><p>存储的数据单位是一个二进制位，英文是 bit，最小的存储单位叫作字节，也就是 8 位，英文是 byte，每一个字节都对应一个内存地址。</p><p>内存地址由 0 开始编号，比如第 1 个地址是 0，第 2 个地址是 1， 然后自增排列，最后一个地址是内存中的字节数减 1。</p><p>我们通常说的内存都是随机存取器，也就是读取任何一个地址数据的速度是一样的，写入任何一个地址数据的速度也是一样的。</p><h3 id="cpu" tabindex="-1"><a class="header-anchor" href="#cpu" aria-hidden="true">#</a> CPU</h3><p>冯诺依曼模型中 CPU 负责控制和计算，为了方便计算较大的数值，CPU 每次可以计算多个字节的数据。</p><ul><li><p>如果 CPU 每次可以计算 4 个 byte，那么我们称作 32 位 CPU；</p></li><li><p>如果 CPU 每次可以计算 8 个 byte，那么我们称作 64 位 CPU。</p></li></ul><p>这里的 32 和 64，称作 CPU 的位宽。</p><p><strong>为什么 CPU 要这样设计呢？</strong></p><p>因为一个 byte 最大的表示范围就是 0~255。</p><p>比如要计算 <code>20000*50</code>，就超出了byte 最大的表示范围了。</p><p>因此，CPU 需要支持多个 byte 一起计算，当然，CPU 位数越大，可以计算的数值就越大，但是在现实生活中不一定需要计算这么大的数值，比如说 32 位 CPU 能计算的最大整数是 4294967295，这已经非常大了。</p><p><strong>控制单元和逻辑运算单元</strong></p><p>CPU 中有一个控制单元专门负责控制 CPU 工作；还有逻辑运算单元专门负责计算。</p><p><strong>寄存器</strong></p><p>CPU 要进行计算，比如最简单的加和两个数字时，因为 CPU 离内存太远，所以需要一种离自己近的存储来存储将要被计算的数字。</p><p>这种存储就是寄存器，寄存器就在 CPU 里，控制单元和逻辑运算单元非常近，因此速度很快。</p><p>常见的寄存器种类：</p><ul><li>通用寄存器，用来存放需要进行运算的数据，比如需要进行加和运算的两个数据。</li><li>程序计数器，用来存储 CPU 要执行下一条指令所在的内存地址，注意不是存储了下一条要执行的指令，此时指令还在内存中，程序计数器只是存储了下一条指令的地址。</li><li>指令寄存器，用来存放程序计数器指向的指令，也就是指令本身，指令被执行完成之前，指令都存储在这里。</li></ul><h4 id="多级缓存" tabindex="-1"><a class="header-anchor" href="#多级缓存" aria-hidden="true">#</a> 多级缓存</h4><p>现代CPU为了提升执行效率，减少CPU与内存的交互(交互影响CPU效率)，一般在CPU上集成了多级缓存架构</p><p><strong>CPU缓存</strong>即高速缓冲存储器，是位于CPU与主内存间的一种容量较小但速度很高的存储器</p><p>由于CPU的速度远高于主内存，CPU直接从内存中存取数据要等待一定时间周期，Cache中保存着CPU刚用过或循环使用的一部分数据，当CPU再次使用该部分数据时可从Cache中直接调用，减少CPU的等待时间，提高了系统的效率，具体包括以下几种：</p><p><strong>L1-Cache</strong></p><p>L1- 缓存在 CPU 中，相比寄存器，虽然它的位置距离 CPU 核心更远，但造价更低，通常 L1-Cache 大小在几十 Kb 到几百 Kb 不等，读写速度在 2~4 个 CPU 时钟周期。</p><p><strong>L2-Cache</strong></p><p>L2- 缓存也在 CPU 中，位置比 L1- 缓存距离 CPU 核心更远，它的大小比 L1-Cache 更大，具体大小要看 CPU 型号，有 2M 的，也有更小或者更大的，速度在 10~20 个 CPU 周期。</p><p><strong>L3-Cache</strong></p><p>L3- 缓存同样在 CPU 中，位置比 L2- 缓存距离 CPU 核心更远，大小通常比 L2-Cache 更大，读写速度在 20~60 个 CPU 周期。</p><p>L3 缓存大小也是看型号的，比如 i9 CPU 有 512KB L1 Cache；有 2MB L2 Cache； 有16MB L3 Cache。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/os-214a4294-df48-4ed4-8f6a-15c93c02037d.png" alt=""></p><p>当 CPU 需要内存中某个数据的时候，如果寄存器中有这个数据，我们可以直接使用；如果寄存器中没有这个数据，我们就要先查询 L1 缓存；L1 中没有，再查询 L2 缓存；L2 中没有再查询 L3 缓存；L3 中没有，再去内存中拿。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/os-936b2476-4704-4928-bfd0-d7417d0f1ab8.png" alt=""></p><p><strong>总结：</strong></p><p>存储器存储空间大小：内存&gt;L3&gt;L2&gt;L1&gt;寄存器；</p><p>存储器速度快慢排序：寄存器&gt;L1&gt;L2&gt;L3&gt;内存；</p><h4 id="安全等级" tabindex="-1"><a class="header-anchor" href="#安全等级" aria-hidden="true">#</a> 安全等级</h4><p><strong>CPU运行安全等级</strong></p><p>CPU有4个运行级别，分别为：</p><ul><li>ring0，ring1，ring2，ring3</li></ul><p>ring0只给操作系统用，ring3谁都能用。</p><p>ring0是指CPU的运行级别，是最高级别，ring1次之，ring2更次之……</p><p>系统（内核）的代码运行在最高运行级别ring0上，可以使用特权指令，控制中断、修改页表、访问设备等等。</p><p>应用程序的代码运行在最低运行级别上ring3上，不能做受控操作。</p><p>如果要做，比如要访问磁盘，写文件，那就要通过执行系统调用（函数），执行系统调用的时候，CPU的运行级别会发生从ring3到ring0的切换，并跳转到系统调用对应的内核代码位置执行，这样内核就为你完成了设备访问，完成之后再从ring0返回ring3。</p><p>这个过程也称作用户态和内核态的切换。</p><h4 id="局部性原理" tabindex="-1"><a class="header-anchor" href="#局部性原理" aria-hidden="true">#</a> 局部性原理</h4><p>在CPU访问存储设备时，无论是存取数据抑或存取指令，都趋于聚集在一片连续的区域中，这就被称为局部性原理</p><p><strong>时间局部性（Temporal Locality）：</strong></p><p>如果一个信息项正在被访问，那么在近期它很可能还会被再次访问。</p><p>比如循环、递归、方法的反复调用等。</p><p><strong>空间局部性（Spatial Locality）：</strong></p><p>如果一个存储器的位置被引用，那么将来他附近的位置也会被引用。</p><p>比如顺序执行的代码、连续创建的两个对象、数组等。</p><h4 id="程序的执行过程" tabindex="-1"><a class="header-anchor" href="#程序的执行过程" aria-hidden="true">#</a> 程序的执行过程</h4><p>程序实际上是一条一条指令，所以程序的运行过程就是把每一条指令一步一步的执行起来，负责执行指令的就是 CPU 了。</p><p><strong>那 CPU 执行程序的过程如下：</strong></p><ul><li>第一步，CPU 读取程序计数器的值，这个值是指令的内存地址，然后 CPU 的控制单元操作地址总线指定需要访问的内存地址，接着通知内存设备准备数据，数据准备好后通过数据总线将指令数据传给 CPU，CPU 收到内存传来的数据后，将这个指令数据存入到指令寄存器。</li><li>第二步，CPU 分析指令寄存器中的指令，确定指令的类型和参数，如果是计算类型的指令，就把指令交给逻辑运算单元运算；如果是存储类型的指令，则交由控制单元执行；</li><li>第三步，CPU 执行完指令后，程序计数器的值自增，表示指向下一条指令。这个自增的大小，由 CPU 的位宽决定，比如 32 位的 CPU，指令是 4 个字节，需要 4 个内存地址存放，因此程序计数器的值会自增 4；</li></ul><p>简单总结一下就是，一个程序执行的时候，CPU 会根据程序计数器里的内存地址，从内存里面把需要执行的指令读取到指令寄存器里面执行，然后根据指令长度自增，开始顺序读取下一条指令。</p><p>CPU 从程序计数器读取指令、到执行、再到下一条指令，这个过程会不断循环，直到程序执行结束，这个不断循环的过程被称为 <strong>CPU 的指令周期</strong>。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/os-0e135ca2-26fa-4495-8a4b-3c9c05a4341e.png" alt=""></p><h3 id="总线" tabindex="-1"><a class="header-anchor" href="#总线" aria-hidden="true">#</a> 总线</h3><p>CPU 和内存以及其他设备之间，也需要通信，因此我们用一种特殊的设备进行控制，就是总线。</p><ul><li>地址总线，用于指定 CPU 将要操作的内存地址；</li><li>数据总线，用于读写内存的数据；</li><li>控制总线，用于发送和接收信号，比如中断、设备复位等信号，CPU 收到信号后自然进行响应，这时也需要控制总线；</li></ul><p>当 CPU 要读写内存数据的时候，一般需要通过两个总线：</p><ul><li>首先要通过地址总线来指定内存的地址；</li><li>再通过数据总线来传输数据；</li></ul><h3 id="输入、输出设备" tabindex="-1"><a class="header-anchor" href="#输入、输出设备" aria-hidden="true">#</a> 输入、输出设备</h3><p>输入设备向计算机输入数据，计算机经过计算，将结果通过输出设备向外界传达。</p><p>如果输入设备、输出设备想要和 CPU 进行交互，比如说用户按键需要 CPU 响应，这时候就需要用到控制总线。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><h2 id="基础知识" tabindex="-1"><a class="header-anchor" href="#基础知识" aria-hidden="true">#</a> 基础知识</h2><h3 id="中断" tabindex="-1"><a class="header-anchor" href="#中断" aria-hidden="true">#</a> 中断</h3><p><strong>中断的类型</strong></p><ul><li><p>按照中断的触发方分成同步中断和异步中断；</p></li><li><p>根据中断是否强制触发分成可屏蔽中断和不可屏蔽中断。</p></li></ul><p>中断可以由 CPU 指令直接触发，这种主动触发的中断，叫作同步中断。</p><blockquote><p>同步中断有几种情况。</p></blockquote><ul><li><p>比如系统调用，需要从用户态切换内核态，这种情况需要程序触发一个中断，叫作陷阱（Trap），中断触发后需要继续执行系统调用。</p></li><li><p>还有一种同步中断情况是错误（Fault），通常是因为检测到某种错误，需要触发一个中断，中断响应结束后，会重新执行触发错误的地方，比如后面我们要学习的缺页中断。</p></li><li><p>最后还有一种情况是程序的异常，这种情况和 Trap 类似，用于实现程序抛出的异常。</p></li></ul><p>另一部分中断不是由 CPU 直接触发，是因为需要响应外部的通知，比如响应键盘、鼠标等设备而触发的中断，这种中断我们称为异步中断。</p><p>CPU 通常都支持设置一个中断屏蔽位（一个寄存器），设置为 1 之后 CPU 暂时就不再响应中断。</p><p>对于键盘鼠标输入，比如陷阱、错误、异常等情况，会被临时屏蔽。</p><p>但是对于一些特别重要的中断，比如 CPU 故障导致的掉电中断，还是会正常触发。</p><p><strong>可以被屏蔽的中断我们称为可屏蔽中断，多数中断都是可屏蔽中断。</strong></p><h3 id="内核态和用户态" tabindex="-1"><a class="header-anchor" href="#内核态和用户态" aria-hidden="true">#</a> 内核态和用户态</h3><p><strong>什么是用户态和内核态</strong></p><p>Kernel 运行在超级权限模式下，所以拥有很高的权限。</p><p>按照权限管理的原则，多数应用程序应该运行在最小权限下。</p><p>因此，很多操作系统，将内存分成了两个区域：</p><ul><li><p>内核空间（Kernal Space），这个空间只有内核程序可以访问；</p></li><li><p>用户空间（User Space），这部分内存专门给应用程序使用。</p></li></ul><p>用户空间中的代码被限制了只能使用一个局部的内存空间，我们说这些程序在用户态 执行。</p><p>内核空间中的代码可以访问所有内存，我们称这些程序在内核态 执行。</p><blockquote><p>按照级别分：</p></blockquote><p>当程序运行在0级特权级上时，就可以称之为运行在内核态</p><p>当程序运行在3级特权级上时，就可以称之为运行在用户态</p><p>运行在用户态下的程序不能直接访问操作系统内核数据结构和程序。</p><p>当我们在系统中执行一个程序时，大部分时间是运行在用户态下的，在其需要操作系统帮助完成某些它没有权力和能力完成的工作时就会切换到内核态（比如操作硬件）</p><p><strong>这两种状态的主要差别</strong></p><p>处于用户态执行时，进程所能访问的内存空间和对象受到限制，其所处于占有的处理器是可被抢占的</p><p>处于内核态执行时，则能访问所有的内存空间和对象，且所占有的处理器是不允许被抢占的。</p><p><strong>为什么要有用户态和内核态</strong></p><p>由于需要限制不同的程序之间的访问能力，防止他们获取别的程序的内存数据，或者获取外围设备的数据，并发送到网络</p><p><strong>用户态与内核态的切换</strong></p><p>所有用户程序都是运行在用户态的，但是有时候程序确实需要做一些内核态的事情， 例如从硬盘读取数据，或者从键盘获取输入等，而唯一可以做这些事情的就是操作系统，所以此时程序就需要先操作系统请求以程序的名义来执行这些操作</p><p><strong>用户态和内核态的转换</strong></p><blockquote><p>系统调用</p></blockquote><p>用户态进程通过系统调用申请使用操作系统提供的服务程序完成工作，比如fork()实际上就是执行了一个创建新进程的系统调用</p><p>而系统调用的机制其核心还是使用了操作系统为用户特别开放的一个中断来实现，例如Linux的int 80h中断</p><p><strong>举例：</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/os-29b6f34f-a8b3-48ec-8e5c-aea1036ea16a.png" alt=""></p><p>如上图所示：内核程序执行在内核态（Kernal Mode），用户程序执行在用户态（User Mode）。</p><p>当发生系统调用时，用户态的程序发起系统调用，因为系统调用中牵扯特权指令，用户态程序权限不足，因此会中断执行，也就是 Trap（Trap 是一种中断）。</p><p>发生中断后，当前 CPU 执行的程序会中断，跳转到中断处理程序，内核程序开始执行，也就是开始处理系统调用。</p><p>内核处理完成后，主动触发 Trap，这样会再次发生中断，切换回用户态工作。</p><blockquote><p>异常</p></blockquote><p>当CPU在执行运行在用户态下的程序时，发生了某些事先不可知的异常，这时会触发由当前运行进程切换到处理此异常的内核相关程序中，也就转到了内核态，比如缺页异常</p><blockquote><p>外围设备的中断</p></blockquote><p>当外围设备完成用户请求的操作后，会向CPU发出相应的中断信号，这时CPU会暂停执行下一条即将要执行的指令转而去执行与中断信号对应的处理程序，如果先前执行的指令是用户态下的程序，那么这个转换的过程自然也就发生了由用户态到内核态的切换</p><p>比如硬盘读写操作完成，系统会切换到硬盘读写的中断处理程序中执行后续操作等</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><h2 id="线程" tabindex="-1"><a class="header-anchor" href="#线程" aria-hidden="true">#</a> 线程</h2><p>线程：系统分配处理器时间资源的基本单元，是程序执行的最小单位</p><p>线程可以看做轻量级的进程，共享内存空间，每个线程都有自己独立的运行栈和程序计数器，线程之间切换的开销小。</p><p>在同一个进程（程序）中有多个线程同时执行（通过CPU调度，在每个时间片中只有一个线程执行）</p><p>进程可以通过 API 创建用户态的线程，也可以通过系统调用创建内核态的线程。</p><h3 id="用户态线程" tabindex="-1"><a class="header-anchor" href="#用户态线程" aria-hidden="true">#</a> 用户态线程</h3><p>用户态线程也称作用户级线程，操作系统内核并不知道它的存在，它完全是在用户空间中创建。</p><p>用户级线程有很多优势，比如：</p><ul><li><p>管理开销小：创建、销毁不需要系统调用。</p></li><li><p>切换成本低：用户空间程序可以自己维护，不需要走操作系统调度。</p></li></ul><p>但是这种线程也有很多的缺点：</p><ul><li><p>与内核协作成本高：比如这种线程完全是用户空间程序在管理，当它进行 I/O 的时候，无法利用到内核的优势，需要频繁进行用户态到内核态的切换。</p></li><li><p>线程间协作成本高：设想两个线程需要通信，通信需要 I/O，I/O 需要系统调用，因此用户态线程需要额外的系统调用成本。</p></li><li><p>无法利用多核优势：比如操作系统调度的仍然是这个线程所属的进程，所以无论每次一个进程有多少用户态的线程，都只能并发执行一个线程，因此一个进程的多个线程无法利用多核的优势。</p></li></ul><p>操作系统无法针对线程调度进行优化：当一个进程的一个用户态线程阻塞（Block）了，操作系统无法及时发现和处理阻塞问题，它不会更换执行其他线程，从而造成资源浪费。</p><h3 id="内核态线程" tabindex="-1"><a class="header-anchor" href="#内核态线程" aria-hidden="true">#</a> 内核态线程</h3><p>内核态线程也称作内核级线程（Kernel Level Thread），这种线程执行在内核态，可以通过系统调用创造一个内核级线程。</p><p>内核级线程有很多优势：</p><ul><li><p>可以利用多核 CPU 优势：内核拥有较高权限，因此可以在多个 CPU 核心上执行内核线程。</p></li><li><p>操作系统级优化：内核中的线程操作 I/O 不需要进行系统调用；一个内核线程阻塞了，可以立即让另一个执行。</p></li></ul><p>当然内核线程也有一些缺点：</p><ul><li><p>创建成本高：创建的时候需要系统调用，也就是切换到内核态。</p></li><li><p>扩展性差：由一个内核程序管理，不可能数量太多。</p></li><li><p>切换成本较高：切换的时候，也同样存在需要内核操作，需要切换内核态。</p></li></ul><p><strong>用户态线程和内核态线程之间的映射关系</strong></p><p>如果有一个用户态的进程，它下面有多个线程，如果这个进程想要执行下面的某一个线程，应该如何做呢？</p><blockquote><p>这时，比较常见的一种方式，就是将需要执行的程序，让一个内核线程去执行。</p></blockquote><p>毕竟，内核线程是真正的线程，因为它会分配到 CPU 的执行资源。</p><p>如果一个进程所有的线程都要自己调度，相当于在进程的主线程中实现分时算法调度每一个线程，也就是所有线程都用操作系统分配给主线程的时间片段执行。</p><blockquote><p>这种做法，相当于操作系统调度进程的主线程；进程的主线程进行二级调度，调度自己内部的线程。</p></blockquote><p>这样操作劣势非常明显，比如无法利用多核优势，每个线程调度分配到的时间较少，而且这种线程在阻塞场景下会直接交出整个进程的执行权限。</p><p>由此可见，用户态线程创建成本低，问题明显，不可以利用多核。</p><p>内核态线程，创建成本高，可以利用多核，切换速度慢。</p><p>因此通常我们会在内核中预先创建一些线程，并反复利用这些线程。</p><h3 id="协程" tabindex="-1"><a class="header-anchor" href="#协程" aria-hidden="true">#</a> 协程</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/os-586071a1-3d5f-4873-963f-d47b8aeea594.png" alt=""></p><p>协程，是一种比线程更加轻量级的存在，协程不是被操作系统内核所管理，而完全是由程序所控制（也就是在用户态执行）。</p><p>这样带来的好处就是性能得到了很大的提升，不会像线程切换那样消耗资源。</p><p><strong>子程序</strong></p><p>或者称为函数，在所有语言中都是层级调用，比如A调用B，B在执行过程中又调用了C，C执行完毕返回，B执行完毕返回，最后是A执行完毕。</p><p>所以子程序调用是通过栈实现的，一个线程就是执行一个子程序。</p><p>子程序调用总是一个入口，一次返回，调用顺序是明确的。</p><p><strong>协程的特点在于是一个线程执行，那和多线程比，协程有何优势？</strong></p><ul><li>极高的执行效率：因为子程序切换不是线程切换，而是由程序自身控制，因此，没有线程切换的开销，和多线程比，线程数量越多，协程的性能优势就越明显；</li><li>不需要多线程的锁机制：因为只有一个线程，也不存在同时写变量冲突，在协程中控制共享资源不加锁，只需要判断状态就好了，所以执行效率比多线程高很多。</li></ul><h3 id="线程安全" tabindex="-1"><a class="header-anchor" href="#线程安全" aria-hidden="true">#</a> 线程安全</h3><p>如果你的代码所在的进程中有多个线程在同时运行，而这些线程可能会同时运行这段代码。</p><p>如果每次运行结果和单线程运行的结果是一样的，而且其他的变量的值也和预期的是一样的，就是线程安全的。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><h2 id="进程" tabindex="-1"><a class="header-anchor" href="#进程" aria-hidden="true">#</a> 进程</h2><p>在系统中正在运行的一个应用程序；程序一旦运行就是进程；是资源分配的最小单位。</p><p>在操作系统中能同时运行多个进程；</p><p>开机的时候，磁盘的内核镜像被导入内存作为一个执行副本，成为内核进程。</p><p>进程可以分成<strong>用户态进程和内核态进程</strong>两类，用户态进程通常是应用程序的副本，内核态进程就是内核本身的进程。</p><p>如果用户态进程需要申请资源，比如内存，可以通过系统调用向内核申请。</p><p>每个进程都有独立的内存空间，存放代码和数据段等，程序之间的切换会有较大的开销；</p><p><strong>分时和调度</strong></p><p>每个进程在执行时都会获得操作系统分配的一个时间片段，如果超出这个时间，就会轮到下一个进程（线程）执行。</p><blockquote><p>注意，现代操作系统都是直接调度线程，不会调度进程。</p></blockquote><p><strong>分配时间片段</strong></p><p>如下图所示，进程 1 需要 2 个时间片段，进程 2 只有 1 个时间片段，进程 3 需要 3 个时间片段。</p><p>因此当进程 1 执行到一半时，会先挂起，然后进程 2 开始执行；进程 2 一次可以执行完，然后进程 3 开始执行，不过进程 3 一次执行不完，在执行了 1 个时间片段后，进程 1 开始执行；就这样如此周而复始，这个就是分时技术。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/os-606eb7bd-e9e1-457a-bf61-66b152c5ada5.png" alt=""></p><h3 id="创建进程" tabindex="-1"><a class="header-anchor" href="#创建进程" aria-hidden="true">#</a> 创建进程</h3><p>用户想要创建一个进程，最直接的方法就是从命令行执行一个程序，或者双击打开一个应用，但对于程序员而言，显然需要更好的设计。</p><p>首先，应该有 API 打开应用，比如可以通过函数打开某个应用；</p><p>另一方面，如果程序员希望执行完一段代价昂贵的初始化过程后，将当前程序的状态复制好几份，变成一个个单独执行的进程，那么操作系统提供了 fork 指令。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/os-85a86f1b-eeff-401e-8bfe-19e5509e2a53.png" alt=""></p><p>也就是说，每次 fork 会多创造一个克隆的进程，这个克隆的进程，所有状态都和原来的进程一样，但是会有自己的地址空间。</p><p>如果要创造 2 个克隆进程，就要 fork 两次。</p><blockquote><p>那如果我就是想启动一个新的程序呢？</p></blockquote><p>操作系统提供了启动新程序的 API。</p><p>如果我就是想用一个新进程执行一小段程序，比如说每次服务端收到客户端的请求时，我都想用一个进程去处理这个请求。</p><p>如果是这种情况，建议你不要单独启动进程，而是使用线程。</p><p>因为进程的创建成本实在太高了，因此不建议用来做这样的事情：要创建条目、要分配内存，特别是还要在内存中形成一个个段，分成不同的区域。所以通常，我们更倾向于多创建线程。</p><p>不同程序语言会自己提供创建线程的 API，比如 Java 有 Thread 类；go 有 go-routine（注意不是协程，是线程）。</p><h3 id="进程状态" tabindex="-1"><a class="header-anchor" href="#进程状态" aria-hidden="true">#</a> 进程状态</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/os-5f202fa5-0922-4b41-b4f2-f8a9af37a176.png" alt=""></p><p><strong>创建状态</strong></p><p>进程由创建而产生，创建进程是一个非常复杂的过程，一般需要通过多个步骤才能完成：如首先由进程申请一个空白的进程控制块(PCB)，并向PCB中填写用于控制和管理进程的信息；然后为该进程分配运行时所必须的资源；最后，把该进程转入就绪状态并插入到就绪队列中</p><p><strong>就绪状态</strong></p><p>这是指进程已经准备好运行的状态，即进程已分配到除CPU以外所有的必要资源后，只要再获得CPU，便可立即执行，如果系统中有许多处于就绪状态的进程，通常将它们按照一定的策略排成一个队列，该队列称为就绪队列，有执行资格，没有执行权的进程</p><p><strong>运行状态</strong></p><p>这里指进程已经获取CPU，其进程处于正在执行的状态。对任何一个时刻而言，在单处理机的系统中，只有一个进程处于执行状态而在多处理机系统中，有多个进程处于执行状态，既有执行资格，又有执行权的进程</p><p><strong>阻塞状态</strong></p><p>这里是指正在执行的进程由于发生某事件（如I/O请求、申请缓冲区失败等）暂时无法继续执行的状态，即进程执行受到阻塞，此时引起进程调度，操作系统把处理机分配给另外一个就绪的进程，而让受阻的进程处于暂停的状态，一般将这个暂停状态称为阻塞状态</p><p><strong>终止状态</strong></p><h3 id="进程间通信ipc" tabindex="-1"><a class="header-anchor" href="#进程间通信ipc" aria-hidden="true">#</a> 进程间通信IPC</h3><p>每个进程各自有不同的用户地址空间，任何一个进程的全局变量在另一个进程中都看不到，所以进程之间要交换数据必须通过内核，在内核中开辟一块缓冲区，进程1把数据从用户空间拷到内核缓冲区，进程2再从内核缓冲区把数据读走，内核提供的这种机制称为进程间通信</p><p><strong>管道/匿名管道</strong></p><p>管道是半双工的，数据只能向一个方向流动；需要双方通信时，需要建立起两个管道。</p><ul><li><p>只能用于父子进程或者兄弟进程之间(具有亲缘关系的进程);</p></li><li><p>单独构成一种独立的文件系统：管道对于管道两端的进程而言，就是一个文件，但它不是普通的文件，它不属于某种文件系统，而是自立门户，单独构成一种文件系统，并且只存在与内存中。</p></li><li><p>数据的读出和写入：一个进程向管道中写的内容被管道另一端的进程读出，写入的内容每次都添加在管道缓冲区的末尾，并且每次都是从缓冲区的头部读出数据。</p></li></ul><p><strong>有名管道(FIFO)</strong></p><p>匿名管道，由于没有名字，只能用于亲缘关系的进程间通信。</p><p>为了克服这个缺点，提出了有名管道(FIFO)。</p><p>有名管道不同于匿名管道之处在于它提供了一个路径名与之关联，以有名管道的文件形式存在于文件系统中，这样，即使与有名管道的创建进程不存在亲缘关系的进程，只要可以访问该路径，就能够彼此通过有名管道相互通信，因此，通过有名管道不相关的进程也能交换数据。</p><p><strong>信号</strong></p><p>信号是Linux系统中用于进程间互相通信或者操作的一种机制，信号可以在任何时候发给某一进程，而无需知道该进程的状态。</p><p>如果该进程当前并未处于执行状态，则该信号就有内核保存起来，知道该进程回复执行并传递给它为止。</p><p>如果一个信号被进程设置为阻塞，则该信号的传递被延迟，直到其阻塞被取消是才被传递给进程。</p><p><strong>消息队列</strong></p><p>消息队列是存放在内核中的消息链表，每个消息队列由消息队列标识符表示。</p><p>与管道（无名管道：只存在于内存中的文件；命名管道：存在于实际的磁盘介质或者文件系统）不同的是消息队列存放在内核中，只有在内核重启(即操作系统重启)或者显示地删除一个消息队列时，该消息队列才会被真正的删除。</p><p>另外与管道不同的是，消息队列在某个进程往一个队列写入消息之前，并不需要另外某个进程在该队列上等待消息的到达</p><p><strong>共享内存</strong></p><p>使得多个进程可以直接读写同一块内存空间，是最快的可用IPC形式，是针对其他通信机制运行效率较低而设计的。</p><p>为了在多个进程间交换信息，内核专门留出了一块内存区，可以由需要访问的进程将其映射到自己的私有地址空间，进程就可以直接读写这一块内存而不需要进行数据的拷贝，从而大大提高效率。</p><p>由于多个进程共享一段内存，因此需要依靠某种同步机制（如信号量）来达到进程间的同步及互斥。</p><p>共享内存示意图：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/os-8644f82a-eda6-4abf-b86a-13c02e7af5fd.png" alt=""></p><p>一旦这样的内存映射到共享它的进程的地址空间，这些进程间数据传递不再涉及到内核，换句话说是进程不再通过执行进入内核的系统调用来传递彼此的数据。</p><p><strong>信号量</strong></p><p>信号量是一个计数器，用于多进程对共享数据的访问，信号量的意图在于进程间同步。</p><p>为了获得共享资源，进程需要执行下列操作：</p><ol><li><p>创建一个信号量：这要求调用者指定初始值，对于二值信号量来说，它通常是1，也可是0。</p></li><li><p>等待一个信号量：该操作会测试这个信号量的值，如果小于0，就阻塞，也称为P操作。</p></li><li><p>挂出一个信号量：该操作将信号量的值加1，也称为V操作。</p></li></ol><p><strong>套接字(Socket)</strong></p><p>套接字是一种通信机制，凭借这种机制，客户/服务器（即要进行通信的进程）系统的开发工作既可以在本地单机上进行，也可以跨网络进行。也就是说它可以让不在同一台计算机但通过网络连接计算机上的进程进行通信。</p><h3 id="信号" tabindex="-1"><a class="header-anchor" href="#信号" aria-hidden="true">#</a> 信号</h3><p>信号是进程间通信机制中唯一的异步通信机制，可以看作是异步通知，通知接收信号的进程有哪些事情发生了。</p><p>也可以简单理解为信号是某种形式上的软中断</p><p>可运行<code>kill -l</code>查看Linux支持的信号列表：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>kill -l
  1) SIGHUP   2) SIGINT   3) SIGQUIT  4) SIGILL   5) SIGTRAP
  6) SIGABRT  7) SIGBUS   8) SIGFPE   9) SIGKILL 10) SIGUSR1
 11) SIGSEGV 12) SIGUSR2 13) SIGPIPE 14) SIGALRM 15) SIGTERM
@@ -63,6 +63,6 @@ root     31094     1  0 07:28 ?        00:00:00 ping www.ibm.com
 root     31102 29217  0 07:29 pts/4    00:00:00 grep www.ibm.com
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>上例中我们的进程 ID(PID)为31094，而它的父 ID（PPID）为1（即为 init 进程 ID），并不是当前终端的进程 ID。</p><blockquote><p>5.将命令+ &amp;放在()括号中，也可以是进程不受HUP信号的影响</p></blockquote><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>[root@pvcent107 ~]## (ping www.ibm.com &amp;)
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p><strong>异常和中断的区别</strong></p><blockquote><p>中断</p></blockquote><p>当我们在敲击键盘的同时就会产生中断，当硬盘读写完数据之后也会产生中断，所以，我们需要知道，中断是由硬件设备产生的，而它们从物理上说就是电信号，之后，它们通过中断控制器发送给CPU，接着CPU判断收到的中断来自于哪个硬件设备（这定义在内核中），最后，由CPU发送给内核，有内核处理中断。</p><p>下面这张图显示了中断处理的流程：</p><p>![](https://img-blog.csdnimg.cn/6c0a43b5915e44bf8d05b6d871fd3b25.png&quot;&gt;</p><blockquote><p>异常</p></blockquote><p>CPU处理程序的时候一旦程序不在内存中，会产生缺页异常；当运行除法程序时，当除数为0时，又会产生除0异常。</p><p><strong>异常是由CPU产生的，同时，它会发送给内核，要求内核处理这些异常</strong></p><p>下面这张图显示了异常处理的流程：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/os-1555a2c9-121e-4b08-a685-2d789fc3b66b.png" alt=""></p><blockquote><p>相同点</p></blockquote><ul><li>最后都是由CPU发送给内核，由内核去处理</li><li>处理程序的流程设计上是相似的</li></ul><blockquote><p>不同点</p></blockquote><ul><li>产生源不相同，异常是由CPU产生的，而中断是由硬件设备产生的</li><li>内核需要根据是异常还是中断调用不同的处理程序</li><li>中断不是时钟同步的，这意味着中断可能随时到来；异常由于是CPU产生的，所以它是时钟同步的</li><li>当处理中断时，处于中断上下文中；处理异常时，处于进程上下文中</li></ul><hr><blockquote><p>作者：月伴飞鱼，转载链接：<a href="https://mp.weixin.qq.com/s/G9ZqwEMxjrG5LbgYwM5ACQ" target="_blank" rel="noopener noreferrer">https://mp.weixin.qq.com/s/G9ZqwEMxjrG5LbgYwM5ACQ<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/cs/os.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/29 上午9:05:54</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><!----><a href="/cs/wangluo.html" class="nav-link next" aria-label="计算机网络"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">计算机网络<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 月伴飞鱼</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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diff --git a/dist/cs/wangluo.html b/dist/cs/wangluo.html
index d9f3cacf..d2e7875d 100644
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heading" aria-label="报文段"><!---->报文段<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/wangluo.html#粘包与拆包" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="粘包与拆包"><!---->粘包与拆包<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/wangluo.html#三次握手" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="三次握手"><!---->三次握手<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/wangluo.html#四次挥手" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="四次挥手"><!---->四次挥手<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/wangluo.html#流量控制" class="router-link-active router-link-exact-active nav-link sidebar-link heading" 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aria-label="报文段"><!---->报文段<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/wangluo.html#网络层" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="网络层"><!---->网络层<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/cs/wangluo.html#mac地址" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="MAC地址"><!---->MAC地址<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/wangluo.html#ip地址" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="IP地址"><!---->IP地址<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/wangluo.html#子网掩码" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="子网掩码"><!---->子网掩码<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/wangluo.html#网关" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="网关"><!---->网关<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/wangluo.html#ping" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="Ping"><!---->Ping<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/wangluo.html#dns" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="DNS"><!---->DNS<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/wangluo.html#arp协议" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="ARP协议"><!---->ARP协议<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/wangluo.html#数字签名" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="数字签名"><!---->数字签名<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/wangluo.html#sql注入" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="SQL注入"><!---->SQL注入<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/wangluo.html#加密算法" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="加密算法"><!---->加密算法<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/cs/wangluo.html#对称加密" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="对称加密"><!---->对称加密<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/wangluo.html#非对称加密" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="非对称加密"><!---->非对称加密<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/wangluo.html#网络攻击" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="网络攻击"><!---->网络攻击<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/cs/wangluo.html#csrf和xss" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="CSRF和XSS"><!---->CSRF和XSS<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/wangluo.html#dos攻击" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="DOS攻击"><!---->DOS攻击<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/wangluo.html#cookie和session" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="Cookie和Session"><!---->Cookie和Session<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/wangluo.html#常见面试题" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="常见面试题"><!---->常见面试题<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->计算机网络核心知识点大梳理</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月31日</span><meta property="datePublished" content="2022-03-31T02:38:06.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 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class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/cs/wangluo.html#osi七层模型" class="router-link-active router-link-exact-active toc-link level2">OSI七层模型</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cs/wangluo.html#tcp和ip模型" class="router-link-active router-link-exact-active toc-link level2">TCP和IP模型</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cs/wangluo.html#网络设备" class="router-link-active router-link-exact-active toc-link level2">网络设备</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/cs/wangluo.html#交换机" class="router-link-active router-link-exact-active toc-link level3">交换机</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cs/wangluo.html#路由器" class="router-link-active router-link-exact-active toc-link 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level2">数字签名</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cs/wangluo.html#sql注入" class="router-link-active router-link-exact-active toc-link level2">SQL注入</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cs/wangluo.html#加密算法" class="router-link-active router-link-exact-active toc-link level2">加密算法</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/cs/wangluo.html#对称加密" class="router-link-active router-link-exact-active toc-link level3">对称加密</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cs/wangluo.html#非对称加密" class="router-link-active router-link-exact-active toc-link level3">非对称加密</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cs/wangluo.html#网络攻击" class="router-link-active router-link-exact-active toc-link level2">网络攻击</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/cs/wangluo.html#csrf和xss" class="router-link-active router-link-exact-active toc-link level3">CSRF和XSS</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cs/wangluo.html#dos攻击" class="router-link-active router-link-exact-active toc-link level3">DOS攻击</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cs/wangluo.html#cookie和session" class="router-link-active router-link-exact-active toc-link level2">Cookie和Session</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cs/wangluo.html#常见面试题" class="router-link-active router-link-exact-active toc-link level2">常见面试题</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="计算机网络核心知识点大梳理" tabindex="-1"><a class="header-anchor" href="#计算机网络核心知识点大梳理" aria-hidden="true">#</a> 计算机网络核心知识点大梳理</h1><blockquote><p>作者：月伴飞鱼，转载链接：<a href="https://mp.weixin.qq.com/s/7EddtzpwIRvYfw34QE4zvw" target="_blank" rel="noopener noreferrer">https://mp.weixin.qq.com/s/7EddtzpwIRvYfw34QE4zvw<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-608345cf-8378-4b34-bc91-ca6d2fa25da7.png" alt=""></p><h2 id="osi七层模型" tabindex="-1"><a class="header-anchor" href="#osi七层模型" aria-hidden="true">#</a> OSI七层模型</h2><p><strong>物理层</strong></p><p>首先解决两台物理机之间的通信需求，具体就是机器A往机器B发送比特流，机器B能收到比特流。</p><p>物理层主要定义了物理设备的标准，如网线的类型，光纤的接口类型，各种传输介质的传输速率。</p><p>主要作用是传输比特流（<code>0101</code>二进制数据），将比特流转化为电流强弱传输，到达目的后再转化为比特流，即常说的数模转化和模数转换。</p><p>这层数据叫做比特。<strong>网卡工作在这层</strong>。</p><p>物理层是OSI七层模型的物理基础，没有它就谈不上数据传输了</p><p>物理层就是由实物所承载的，所以作比喻的话，公路、汽车和飞机等承载货物（数据）的交通工具，就是物理层的象征</p><p><strong>数据链路层</strong></p><p>在传输比特流的过程中，会产生错传、数据传输不完整的可能。</p><p>数据链路层定义了<strong>如何格式化数据进行传输</strong>，以及如何控制对物理介质的访问。通常提供错误检测和纠正，以确保数据传输的准确性。</p><p>本层将比特数据组成帧，交换机工作在这层，对帧解码，并根据帧中包含的信息把数据发送到正确的接收方。</p><p>该层负责物理层面上互连的节点之间的通信传输。例如与1个以太网相连的两个节点间的通讯。</p><p>常见的协议有 <code>HDLC、PPP、SLIP</code>等</p><p>数据链路层会将<code>0、1</code>序列划分为具有意义的数据帧传送给对端（<strong>数据帧的生成与接收</strong>）</p><p><strong>网络层</strong></p><p>随着网络节点的不断增加，点对点通讯需要通过多个节点，如何找到目标节点，如何选择最佳路径成为首要需求。</p><p>网络层主要功能是将网络地址转化为对应的物理地址，并决定如何将数据从发送方路由到接收方。</p><p>网络层通过综合考虑发送优先权、网络拥塞程度、服务质量以及可选路由的花费来决定从一个网络中节点A到另一个网络中节点B的最佳路径。</p><p>由于网络层处理并智能指导数据传送，路由器连接网络隔断，所以路由器属于网络层。</p><p>此层的数据称之为数据包。本层需要关注的协议<code>TCP/IP</code>协议中的IP协议。</p><p>网络层负责将数据传输到目标地址。目标地址可以使多个网络通过路由器连接而成的某一个地址。因此这一层主要负责<strong>寻址和路由选择</strong>。主要由 <code>IP、ICMP</code> 两个协议组成</p><p>网络层将数据从发送端的主机发送到接收端的主机，两台主机间可能会存在很多数据链路，但网络层就是负责找出一条相对顺畅的通路将数据传递过去。传输的地址使用的是IP地址。IP地址通过不断转发到更近的IP地址，最终可以到达目标地址</p><p><strong>传输层</strong></p><p>随着网络通信需求的进一步扩大，通信过程中需要发送大量的数据，如海量文件传输，可能需要很长时间，网络在通信的过程中会中断很多次，此时为了保证传输大量文件时的准确性，需要对发送出去的数据进行切分，切割为一个一个的段落（<code>Segement</code>）发送，其中一个段落丢失是否重传，段落是否按顺序到达，是传输层需要考虑的问题。</p><p>传输层解决了主机间的数据传输，数据间的传输可以是不同网络，并且传输层解决了<strong>传输质量</strong>的问题。</p><p>传输层需要关注的协议有TCP/IP协议中的<code>TCP</code>协议和<code>UDP</code>协议。</p><p><strong>会话层</strong></p><p>自动收发包，自动寻址。</p><p>会话层作用是<strong>负责建立和断开通信连接</strong>，何时建立，断开连接以及保持多久的连接。常见的协议有 <code>ADSP、RPC</code> 等</p><p><strong>表示层</strong></p><p>Linux给WIndows发包，不同系统语法不一致，如exe不能在<code>Linux</code>下执行，shell不能在Windows不能直接运行。于是需要表示层。</p><p>解决<strong>不同系统之间通信语法问题</strong>，在表示层数据将按照网络能理解的方案进行格式化，格式化因所使用网络的不同而不同。</p><p>它主要负责数据格式的转换。具体来说，就是讲设备固有的数据格式转换为网络标准格式。常见的协议有<code>ASCII、SSL/TLS</code> 等</p><p><strong>应用层</strong></p><p>规定发送方和接收方必须使用一个固定长度的消息头，消息头必须使用某种固定的组成，消息头中必须记录消息体的长度等信息，方便接收方正确解析发送方发送的数据。</p><p>应用层旨在更<strong>方便应用从网络中接收的数据</strong>，重点关注<code>TCP/IP</code>协议中的HTTP协议</p><p>四层传输层数据被称作<strong>段</strong>（Segments）；</p><p>三层网络层数据被称做<strong>包</strong>（Packages）；</p><p>二层数据链路层时数据被称为<strong>帧</strong>（Frames）；</p><p>一层物理层时数据被称为<strong>比特流</strong>（Bits）。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-d1fdc5fc-c955-4591-9c95-e297a64eccdc.png" alt=""></p><h2 id="tcp和ip模型" tabindex="-1"><a class="header-anchor" href="#tcp和ip模型" aria-hidden="true">#</a> TCP和IP模型</h2><p>OSI模型注重通信协议必要的功能；TCP/IP更强调在计算机上实现协议应该开发哪种程序</p><p><strong>TCP/IP划分了四层网络模型</strong></p><ul><li>第一层：应用层，主要有负责web浏览器的HTTP协议， 文件传输的FTP协议，负责电子邮件的SMTP协议，负责域名系统的DNS等</li><li>第二层：传输层，主要是有<strong>可靠传输</strong>的TCP协议，特别<strong>高效</strong>的UDP协议。主要负责传输应用层的数据包。</li><li>第三层：网络层，主要是IP协议。主要负责寻址（找到目标设备的位置）</li><li>第四层：数据链路层，主要是负责转换数字信号和物理二进制信号。</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-fa4a4d20-f0db-4ba7-a31e-7772f2f132a8.png" alt=""></p><p><strong>四层网络协议的作用</strong></p><ul><li>发送端是由上至下，把上层来的数据在头部加上各层协议的数据（部首）再下发给下层。</li><li>接受端则由下而上，把从下层接受到的数据进行解密和去掉头部的部首后再发送给上层。</li><li>层层加密和解密后，应用层最终拿到了需要的数据。</li></ul><p><strong>举个例子：</strong></p><p>我们需要发送一个<strong>index.html</strong>。</p><p>两台电脑在应用层都使用HTTP协议（即都使用浏览器）。</p><p>在传输层，TCP协议会将HTTP协议发送的数据看作一个数据包，并在这个数据包前面加上TCP包的一部分信息（部首）</p><p>在网络层，IP协议会将TCP协议要发送的数据看作一个数据包，同样的在这个数据包前端加上IP协议的部首</p><p>在数据链路层，对应的协议也会在IP数据包前端加上以太网的部首。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-1d3ce227-fd77-4b95-89dd-aeb786bb4b9e.png" alt=""></p><p>源设备和目标设备通过网线连接，就可以通过物理层的二进制传输数据。</p><p>数据链路层，会使用对应的协议找到物理层的二进制数据，解码得到以太网的部首信息和对应的IP数据包，再将IP数据包传给上层的网络层。</p><p>数据链路层&gt;网络层&gt;传输层&gt;应用层，一层层的解码，最后就可以在浏览器中得到目标设备传送过来的<strong>index.html</strong>。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-731f7daa-1b47-4191-828f-c6e54d650604.png" alt=""></p><p><strong>TCP/IP协议族</strong></p><p>从字面意义上来讲，TCP/IP是指<strong>传输层</strong>的TCP协议和<strong>网络层</strong>的IP协议。</p><p>实际上，TCP/IP只是利用 IP 进行通信时所必须用到的协议群的统称。</p><p>具体来说，在网络层是IP/ICMP协议、在传输层是TCP/UDP协议、在应用层是SMTP、FTP、以及 HTTP 等。他们都属于 TCP/IP 协议。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><h2 id="网络设备" tabindex="-1"><a class="header-anchor" href="#网络设备" aria-hidden="true">#</a> 网络设备</h2><h3 id="交换机" tabindex="-1"><a class="header-anchor" href="#交换机" aria-hidden="true">#</a> 交换机</h3><p>交换机可以接入多台电脑</p><p>每个电脑网卡的 <strong>MAC 地址</strong>都是不一样的，电脑发送数据时，数据头部携带网卡的 MAC 地址，用 MAC 地址标识来不同的电脑</p><p>交换机就可以识别数据头部的 MAC 地址来区分不同的电脑</p><p>交换机除了能识别不同的电脑，还需要找到电脑连接的<strong>交换机端口</strong>，才能顺利的把数据从相应端口发送出去</p><p>交换机通过<strong>自学机制</strong>，把学习到的设备 MAC 地址和交换机端口号添加到 <strong>MAC 地址表</strong>，并根据 MAC 地址表进行数据<strong>转发</strong></p><h3 id="路由器" tabindex="-1"><a class="header-anchor" href="#路由器" aria-hidden="true">#</a> 路由器</h3><p>交换机需要记录的 MAC 地址表也越来越多，需要的交换机也越来越多</p><p>但是交换机的<strong>容量和性能有限</strong>，MAC 地址表无法记录全世界电脑的 MAC 地址和对应的端口号，MAC 地址表太大也无法快速查找到对应的 MAC 地址表项</p><p>于是就有了三层网络设备<strong>路由器</strong>，路由器可以把全世界的网络连接起来</p><p>局域网内的网络连接可以使用<strong>交换机</strong>，例如一个公司内的网络或者一个校园内的网络通过交换机连接</p><p>不同区域的局域网互联使用<strong>路由器</strong></p><blockquote><p>那么如何区分不同的网络区域呢？又是如何跨网络区域进行数据转发的呢？</p></blockquote><p>路由器有多个端口，分别连接不同的网络区域，不同网络区域的 IP 地址<strong>网络号不同</strong></p><p>它通过识别目的 IP 地址的<strong>网络号</strong>，再根据<strong>路由表</strong>进行数据转发</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><h2 id="http" tabindex="-1"><a class="header-anchor" href="#http" aria-hidden="true">#</a> HTTP</h2><p><strong>请求方法</strong></p><p>HTTP1.0 定义了三种请求方法： GET, POST 和 HEAD方法。</p><p>HTTP1.1 新增了六种请求方法：OPTIONS、PUT、PATCH、DELETE、TRACE 和 CONNECT 方法。</p><table><thead><tr><th>序 号</th><th>方法</th><th>描述</th></tr></thead><tbody><tr><td>1</td><td>GET</td><td>请求指定的页面信息，并返回实体主体。</td></tr><tr><td>2</td><td>HEAD</td><td>类似于 GET 请求，只不过返回的响应中没有具体的内容，用于获取报头</td></tr><tr><td>3</td><td>POST</td><td>向指定资源提交数据进行处理请求（例如提交表单或者上传文件）。数据被包含在请求体中。POST 请求可能会导致新的资源的建立和/或已有资源的修改。</td></tr><tr><td>4</td><td>PUT</td><td>从客户端向服务器传送的数据取代指定的文档的内容。</td></tr><tr><td>5</td><td>DELETE</td><td>请求服务器删除指定的页面。</td></tr><tr><td>6</td><td>CONNECT</td><td>HTTP/1.1 协议中预留给能够将连接改为管道方式的代理服务器。</td></tr><tr><td>7</td><td>OPTIONS</td><td>允许客户端查看服务器的性能。</td></tr><tr><td>8</td><td>TRACE</td><td>回显服务器收到的请求，主要用于测试或诊断。</td></tr><tr><td>9</td><td>PATCH</td><td>是对 PUT 方法的补充，用来对已知资源进行局部更新 。</td></tr></tbody></table><p><strong>GET请求和POST请求的区别</strong></p><ol><li>GET 请求的请求参数是添加到 head 中，可以在 url 中可以看到；POST 请求的请求参数是添加到body中，在url 中不可见。</li><li>请求的url有长度限制，这个限制由浏览器和 web 服务器决定和设置的，例如IE浏览器对 URL的最大限制为2083个字符，如果超过这个数字，提交按钮没有任何反应，因为GET请求的参数是添加到URL中，所以GET请求的URL的长度限制需要将请求参数长度也考虑进去。而POST请求不用考虑请求参数的长度。</li><li>GET请求产生一个数据包; POST请求产生2个数据包，在火狐浏览器中，产生一个数据包，这个区别点在于浏览器的请求机制，先发送请求头，再发送请求体，因为GET没有请求体，所以就发送一个数据包，而POST包含请求体，所以发送两次数据包，但是由于火狐机制不同，所以发送一个数据包。</li><li>GET 请求会被浏览器主动缓存下来，留下历史记录，而 POST 默认不会。</li><li>GET是幂等的，而POST不是(幂等表示执行相同的操作，结果也是相同的)</li><li>GET是获取数据，POST是修改数据</li></ol><h3 id="状态码" tabindex="-1"><a class="header-anchor" href="#状态码" aria-hidden="true">#</a> 状态码</h3><p><strong>状态码由3位数字组成，第一位定义响应的类别</strong></p><p>1XX：指示信息，表示请求以接收，继续处理</p><p>2XX：成功，表示请求已经被成功接收、理解、接受</p><ul><li><p>200 OK 是最常见的成功状态码，表示一切正常。如果是非 HEAD 请求，服务器返回的响应头都会有 body 数据。</p></li><li><p>204 No Content 也是常见的成功状态码，与 200 OK 基本相同，但响应头没有 body 数据。</p></li><li><p>206 Partial Content 是应用于 HTTP 分块下载或断电续传，表示响应返回的 body 数据并不是资源的全部，而是其中的一部分，也是服务器处理成功的状态。</p></li></ul><p>3XX：状态码表示客户端请求的资源发送了变动，需要客户端用新的 URL 重新发送请求获取资源，也就是<strong>重定向</strong>。</p><ul><li>301 Moved Permanently 表示永久重定向，说明请求的资源已经不存在了，需改用新的 URL 再次访问，搜索引擎在抓取新内容的同时也将旧的网址交换为重定向之后的网址。</li><li>302 Moved Permanently 表示临时重定向，说明请求的资源还在，但暂时需要用另一个 URL 来访问，搜索引擎会抓取新的内容而保存旧的网址。</li></ul><p>301 和 302 都会在响应头里使用字段 Location，指明后续要跳转的 URL，浏览器会自动重定向新的 URL。</p><ul><li>304 Not Modified不具有跳转的含义，表示资源未修改，重定向已存在的缓冲文件，也称缓存重定向，用于缓存控制。</li></ul><p>4XX：状态码表示客户端发送的<strong>报文有误</strong>，服务器无法处理，也就是错误码的含义。</p><ul><li><p>400 Bad Request表示客户端请求的报文有错误。</p></li><li><p>401 Unauthorized：缺失或错误的认证，这个状态代码必须和WWW-Authenticate报头域一起使用。</p></li><li><p>403 Forbidden表示服务器禁止访问资源，并不是客户端的请求出错。</p></li><li><p>404 Not Found表示请求的资源在服务器上不存在或未找到，所以无法提供给客户端。</p></li></ul><p>5XX：状态码表示客户端请求报文正确，但是<strong>服务器处理时内部发生了错误</strong>，属于服务器端的错误码。</p><ul><li><p>501 Not Implemented 表示客户端请求的功能还不支持。</p></li><li><p>502 Bad Gateway 通常是服务器作为网关或代理时返回的错误码，表示服务器自身工作正常，访问后端服务器发生了错误。</p></li><li><p>503 Service Unavailable 表示服务器当前很忙，暂时无法响应服务器。</p></li><li><p>504 Gateway Timeout：网关超时，由作为代理或网关的服务器使用，表示不能及时地从远程服务器获得应答。</p></li></ul><p><strong>301和302的区别</strong></p><p>301重定向，指页面永久性转移，表示为资源或页面永久性地转移到了另一个位置。</p><p>301是HTTP协议中的一种状态码，当用户或搜索引擎向服务器发出浏览请求时，服务器返回的HTTP数据流中头信息中包含状态码 301 ，表示该资源已经永久改变了位置。</p><p>302重定向是页面暂时性转移，搜索引擎会抓取新的内容而保存旧的网址并认为新的网址只是暂时的。</p><h3 id="http1-1" tabindex="-1"><a class="header-anchor" href="#http1-1" aria-hidden="true">#</a> HTTP1.1</h3><p><strong>长连接</strong></p><p>HTTP 1.1支持长连接</p><p>HTTP 1.0规定浏览器与服务器只保持短暂的连接，浏览器的每次请求都需要与服务器建立一个TCP连接，服务器完成请求处理后立即断开TCP连接，服务器不跟踪每个客户也不记录过去的请求。</p><p>HTTP 1.1则支持持久连接Persistent Connection，并且默认使用，在同一个TCP的连接中可以传送多个HTTP请求和响应，多个请求和响应可以重叠，多个请求和响应可以同时进行，更加多的请求头和响应头</p><p>HTTP 1.1的持续连接，也需要增加新的请求头来帮助实现，例如，Connection请求头的值为Keep-Alive时，客户端通知服务器返回本次请求结果后保持连接；Connection请求头的值为Close时，客户端通知服务器返回本次请求结果后关闭连接。</p><p><strong>管道网络传输</strong></p><p>HTTP/1.1 采用了长连接的方式，这使得管道网络传输成为了可能。</p><p>即可在同一个 TCP 连接里面，客户端可以发起多个请求，只要第一个请求发出去了，不必等其回来，就可以发第二个请求出去，可以<strong>减少整体的响应时间。</strong></p><p>举例来说，客户端需要请求两个资源。以前的做法是，在同一个TCP连接里面，先发送 A 请求，然后等待服务器做出回应，收到后再发出 B 请求，管道机制则是允许浏览器同时发出 A 请求和 B 请求。</p><p>但是服务器还是按照<strong>顺序</strong>，先回应 A 请求，完成后再回应 B 请求，要是 前面的回应特别慢，后面就会有许多请求排队等着。</p><p><strong>Host字段</strong></p><p>在HTTP1.0中认为每台服务器都绑定一个唯一的IP地址，因此，请求消息中的URL并没有传递主机名，但随着虚拟主机技术的发展，在一台物理服务器上可以存在多个虚拟主机，并且它们共享一个IP地址。</p><p>HTTP1.1的请求消息和响应消息都应支持Host头域，且请求消息中如果没有Host头域会报告一个错误（400 Bad Request）。</p><p>此外，服务器应该接受以绝对路径标记的资源请求。</p><p><strong>100Status</strong></p><p>HTTP/1.1加入了一个新的状态码100。</p><p>客户端事先发送一个只带头域的请求，如果服务器因为权限拒绝了请求，就回送响应码401（Unauthorized）；</p><p>如果服务器接收此请求就回送响应码100，客户端就可以继续发送带实体的完整请求了。</p><p>100状态代码的使用，允许客户端在发request消息body之前先用request header试探一下server，看server要不要接收request body，再决定要不要发request body。</p><p><strong>Chunked Transfer Coding</strong></p><p>HTTP/1.1将发送方将消息分割成若干个任意大小的数据块，每个数据块在发送时都会附上块的长度，最后用一个零长度的块作为消息结束的标志。</p><p>这种方法允许发送方只缓冲消息的一个片段，避免缓冲整个消息带来的过载。</p><p><strong>Cache</strong></p><p>HTTP/1.1在1.0的基础上加入了一些Cache的新特性，当缓存对象的Age超过Expire时变为Stable对象，Cache不需要直接抛弃Stable对象，而是与源服务器进行重新激活。</p><h3 id="http2-0" tabindex="-1"><a class="header-anchor" href="#http2-0" aria-hidden="true">#</a> HTTP2.0</h3><p><strong>HTTP2.0和HTTP1.X相比的新特性</strong></p><ul><li><p>新的二进制格式，<code>HTTP1.x</code>的解析是基于文本</p></li><li><p>多路复用，即连接共享，即每一个request都是是用作连接共享机制的，一个request对应一个id，这样一个连接上可以有多个request，每个连接的request可以随机的混杂在一起，接收方可以根据request的 id将request再归属到各自不同的服务端请求里面</p></li><li><p>header压缩，<code>HTTP1.x</code>的header带有大量信息，而且每次都要重复发送，HTTP2.0使用encoder来减少需要传输的header大小，通讯双方各自cache一份header fields表，既避免了重复header的传输，又减小了需要传输的大小</p></li><li><p>服务端推送</p></li></ul><p>HTTP/2 还在一定程度上改善了传统的请求 - 应答工作模式，服务不再是被动地响应，也可以<strong>主动</strong>向客户端发送消息。</p><p>举例来说，在浏览器刚请求 HTML 的时候，就提前把可能会用到的 JS、CSS 文件等静态资源主动发给客户端，<strong>减少延时的等待</strong>，也就是服务器推送。</p><p><strong>数据流</strong></p><p>HTTP/2 的数据包不是按顺序发送的，同一个连接里面连续的数据包，可能属于不同的回应。</p><p>因此，必须要对数据包做标记，指出它属于哪个回应。</p><p>每个请求或回应的所有数据包，称为一个数据流（Stream）。</p><p>每个数据流都标记着一个独一无二的编号，其中规定客户端发出的数据流编号为奇数， 服务器发出的数据流编号为偶数</p><p>客户端还可以<strong>指定数据流的优先级</strong>。优先级高的请求，服务器就先响应该请求。</p><p><strong>HTTP2.0的多路复用和HTTP1.X中的长连接复用有什么区别</strong></p><ul><li>HTTP/1.1的Pipeling为若干个请求排队串行化单线程处理，后面的请求等待前面请求的返回才能获得执行机会，一旦有某请求超时等，后续请求只能被阻塞，毫无办法；</li><li>HTTP2.0多个请求可同时在一个连接上并行执行，某个请求任务耗时严重，不会影响到其它连接的正常执行</li></ul><h3 id="http3-0" tabindex="-1"><a class="header-anchor" href="#http3-0" aria-hidden="true">#</a> HTTP3.0</h3><p><strong>使用UDP协议</strong></p><p>HTTP/2 主要的问题在于：多个 HTTP 请求在复用一个 TCP 连接，下层的 TCP 协议是不知道有多少个 HTTP 请求的。</p><p>所以一旦发生了丢包现象，就会触发 TCP 的重传机制，这样在一个 TCP 连接中的<strong>所有的 HTTP 请求都必须等待这个丢了的包被重传回来</strong>。</p><ul><li>HTTP/1.1 中的管道传输中如果有一个请求阻塞了，那么队列后请求也统统被阻塞住了</li><li>HTTP/2 多请求复用一个TCP连接，一旦发生丢包，就会阻塞住所有的 HTTP 请求。</li></ul><p>这都是基于 TCP 传输层的问题，所以 <strong>HTTP/3 把 HTTP 下层的 TCP 协议改成了 UDP！</strong></p><h3 id="https" tabindex="-1"><a class="header-anchor" href="#https" aria-hidden="true">#</a> HTTPS</h3><p><strong>HTTP与HTTPS的区别</strong></p><p>HTTP 是明文传输协议，HTTPS 协议是由 SSL+HTTP 协议构建的可进行加密传输、身份认证的网络协议，比 HTTP 协议安全</p><ul><li><p>HTTPS比HTTP更加安全，对搜索引擎更友好，利于SEO，谷歌、百度优先索引HTTPS网页</p></li><li><p>HTTPS需要用到SSL证书，而HTTP不用</p></li><li><p>HTTPS标准端口443，HTTP标准端口80</p></li><li><p>HTTPS基于传输层，HTTP基于应用层</p></li><li><p>HTTPS在浏览器显示绿色安全锁，HTTP没有显示</p></li></ul><p><strong>工作原理</strong></p><p>HTTPS 协议会对传输的数据进行加密，而加密过程是使用了非对称加密实现</p><p>HTTPS的整体过程分为证书验证和数据传输阶段，具体的交互过程如下：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-c1db0431-0eee-4c80-bb60-b7508a306864.png" alt=""></p><ul><li>Client发起一个HTTPS的请求</li><li>Server把事先配置好的公钥证书返回给客户端。</li><li>Client验证公钥证书：比如是否在有效期内，证书的用途是不是匹配Client请求的站点，是不是在CRL吊销列表里面，它的上一级证书是否有效，这是一个递归的过程，直到验证到根证书（操作系统内置的Root证书或者Client内置的Root证书），如果验证通过则继续，不通过则显示警告信息。</li><li>Client使用伪随机数生成器生成加密所使用的对称密钥，然后用证书的公钥加密这个对称密钥，发给Server。</li><li>Server使用自己的私钥解密这个消息，得到对称密钥。至此，Client和Server双方都持有了相同的对称密钥。</li><li>Server使用对称密钥加密明文内容A，发送给Client。</li><li>Client使用对称密钥解密响应的密文，得到明文内容A。</li><li>Client再次发起HTTPS的请求，使用对称密钥加密请求的明文内容B，然后Server使用对称密钥解密密文，得到明文内容B。</li></ul><h4 id="数字证书" tabindex="-1"><a class="header-anchor" href="#数字证书" aria-hidden="true">#</a> 数字证书</h4><p>客户端先向服务器端索要公钥，然后用公钥加密信息，服务器收到密文后，用自己的私钥解密。</p><blockquote><p>这就存在些问题，如何保证公钥不被篡改和信任度？</p></blockquote><p>所以这里就需要借助第三方权威机构 CA （数字证书认证机构），将<strong>服务器公钥放在数字证书</strong>（由数字证书认证机构颁发）中，只要证书是可信的，公钥就是可信的。</p><p>通过数字证书的方式保证服务器公钥的身份，解决冒充的风险。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-45917c49-bb08-4f88-84d2-5e8ae53acc7c.png" alt=""></p><h3 id="请求报文" tabindex="-1"><a class="header-anchor" href="#请求报文" aria-hidden="true">#</a> 请求报文</h3><p><strong>请求头</strong></p><p>HTTP 请求报文由3部分组成(请求行+请求头+请求体)</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-3c00598c-43c2-44cd-96c6-ee4d40b97abd.png" alt=""></p><p><strong>常见的HTTP报文头属性</strong></p><ul><li>Accpet <ul><li>告诉服务端，客户端接收什么类型的响应</li></ul></li><li>Referer <ul><li>表示这是请求是从哪个URL进来的,比如想在网上购物，但是不知道选择哪家电商平台，你就去问度娘，说哪家电商的东西便宜啊，然后一堆东西弹出在你面前，第一给就是某宝，当你从这里进入某宝的时候，这个请求报文的Referer就是：<a href="www.baidu.com">www.baidu.com</a></li></ul></li><li>Cache-Control <ul><li>对缓存进行控制，如一个请求希望响应的内容在客户端缓存一年，或不被缓可以通过这个报文头设置</li></ul></li><li>Accept-Encoding <ul><li>这个属性是用来告诉服务器能接受什么编码格式，包括字符编码,压缩形式(一般都是压缩形式) <ul><li>例如:<code>Accept-Encoding:gzip, deflate</code>(这两种都是压缩格式)</li></ul></li></ul></li><li>Host <ul><li>指定要请求的资源所在的主机和端口</li></ul></li><li>User-Agent：告诉服务器，客户端使用的操作系统、浏览器版本和名称</li><li>Connection</li></ul><p>决定当前事务（三次握手和四次挥手）完成后，是否关闭网络连接。</p><ul><li>持久连接，事务完成后不关闭网络连接 ：<code> Connection: keep-alive</code></li></ul><ul><li>非持久连接，事务完成后关闭网络连接： <code>Connection: close</code></li></ul><h3 id="响应报文" tabindex="-1"><a class="header-anchor" href="#响应报文" aria-hidden="true">#</a> 响应报文</h3><p>响应报文与请求报文一样，由三个部分组成(响应行,响应头,响应体)</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-58884113-14dc-4cca-a63e-3320f31a4da5.png" alt=""></p><p><strong>HTTP响应报文属性</strong></p><ul><li>Cache-Control <ul><li>响应输出到客户端后，服务端通过该属性告诉客户端该怎么控制响应内容的缓存</li></ul></li><li>ETag <ul><li>表示你请求资源的版本，如果该资源发生啦变化，那么这个属性也会跟着变</li></ul></li><li>Location <ul><li>在重定向中或者创建新资源时使用</li></ul></li><li>Set-Cookie <ul><li>服务端可以设置客户端的cookie</li></ul></li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><h2 id="tcp" tabindex="-1"><a class="header-anchor" href="#tcp" aria-hidden="true">#</a> TCP</h2><p>TCP是一个传输层协议，提供可靠传输，支持全双工，是一个连接导向的协议。</p><p><strong>双工/单工</strong></p><p>在任何一个时刻，如果数据只能单向发送，就是单工。</p><p>如果在某个时刻数据可以向一个方向传输，也可以向另一个方向反方向传输，而且交替进行，叫作半双工；半双工需要至少 1 条线路。</p><p>如果任何时刻数据都可以双向收发，这就是全双工，全双工需要大于 1 条线路。</p><p>TCP 是一个双工协议，数据任何时候都可以双向传输。</p><p>这就意味着客户端和服务端可以平等地发送、接收信息。</p><p><strong>TCP协议的主要特点</strong></p><ul><li><p>TCP是面向连接的运输层协议；所谓面向连接就是双方传输数据之前，必须先建立一条通道，例如三次握手就是建议通道的一个过程，而四次挥手则是结束销毁通道的一个其中过程。</p></li><li><p>每一条TCP连接只能有两个端点（即两个套接字），只能是点对点的；</p></li><li><p>TCP提供可靠的传输服务。传送的数据无差错、不丢失、不重复、按序到达；</p></li><li><p>TCP提供全双工通信。允许通信双方的应用进程在任何时候都可以发送数据，因为两端都设有发送缓存和接受缓存；</p></li><li><p>面向字节流。虽然应用程序与TCP交互是一次一个大小不等的数据块，但TCP把这些数据看成一连串无结构的字节流，它不保证接收方收到的数据块和发送方发送的数据块具有对应大小关系，例如，发送方应用程序交给发送方的TCP10个数据块，接收方的TCP可能只用收到的4个数据块字节流交付给上层的应用程序</p></li></ul><p><strong>TCP的可靠性原理</strong></p><p>可靠传输有如下两个特点:</p><ol><li>传输信道无差错,保证传输数据正确;</li><li>不管发送方以多快的速度发送数据,接收方总是来得及处理收到的数据;</li></ol><p>首先，采用三次握手来建立TCP连接，四次握手来释放TCP连接，从而保证建立的传输信道是可靠的。</p><p>其次，TCP采用了连续ARQ协议（回退N(Go-back-N)；超时自动重传）来保证数据传输的正确性，使用滑动窗口协议来保证接方能够及时处理所接收到的数据，进行流量控制。</p><p>最后，TCP使用慢开始、拥塞避免、快重传和快恢复来进行拥塞控制，避免网络拥塞。</p><h3 id="报文段" tabindex="-1"><a class="header-anchor" href="#报文段" aria-hidden="true">#</a> 报文段</h3><p>TCP虽面向字节流，但传送的数据单元为报文段</p><p>报文段 = 首部 + 数据2部分</p><p>TCP的全部功能体现在它首部中各字段的作用</p><blockquote><ol><li>首部前20个字符固定、后面有4n个字节是根据需而增加的选项</li><li>故 TCP首部最小长度 = 20字节</li></ol></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-8011660d-24c8-460f-ac3d-b97ad9c99b13.png" alt=""></p><p><strong>端口</strong>：</p><p>源端口号和目地端口各占16位两个字节，也就是端口的范围是<code>2^16=65535</code></p><p>另外1024以下是系统保留的，从1024-65535是用户使用的端口范围</p><p><strong>seq序号</strong>：占4字节，TCP连接中传送的字节流中的每个字节都按顺序编号。</p><p>例如：一段报文的序号字段值是107，携带的数据是100个字段，下一个报文段序号从107+100=207开始。</p><p><strong>ack确认号</strong>：4个字节，是期望收到对方下一个报文段的第一个数据字节的序号。</p><p>例如：B收到A发送的报文，其序号字段是301，数据长度是200字节，表明B正确收到A发送的到序号500为止的数据（301+200-1=500），B期望收到A下一个数据序号是501，B发送给A的确认报文段中把ack确认号置为501。</p><p><strong>数据偏移</strong>：头部有可选字段，长度不固定，指出TCP报文段的数据起始处距离报文段的起始处有多远。</p><p><strong>保留</strong>：保留今后使用的，被标为1。</p><p><strong>控制位</strong>：由8个标志位组成。每个标志位表示一个控制功能。</p><p>其中主要的6个：</p><ul><li><p><strong>URG紧急指针标志</strong>，为1表示紧急指针有效，为0忽略紧急指针。</p></li><li><p><strong>ACK确认序号标志</strong>，为1表示确认号有效，为0表示报文不含确认信息，忽略确认号字段，上面的确认号是否有效就是通过该标识控制的。</p></li><li><p><strong>PSH标志</strong>，为1表示带有push标志的数据，指示接收方在接收到该报文段以后，应尽快将该报文段交给应用程序，而不是在缓冲区排队。</p></li><li><p><strong>RST重置连接标志</strong>，重置因为主机崩溃或其他原因而出现错误的连接，或用于拒绝非法的报文段或非法的连接。</p></li><li><p><strong>SYN同步序号</strong>，同步序号，用于建立连接过程，在连接请求中，SYN=1和ACK=0表示该数据段没有使用捎带的确认域，而连接应答捎带一个确认，即SYN=1和ACK=1。。</p></li><li><p><strong>FIN终止标志</strong>，用于释放连接，为1时表示发送方没有发送了。</p></li></ul><p><strong>窗口</strong>：滑动窗口大小，用来告知发送端接收端缓存大小，以此控制发送端发送数据的速率，从而达到流量控制。</p><p><strong>校验和</strong>：奇偶校验，此校验和是对整个的TCP报文段（包括TCP头部和TCP数据），以16位进行计算所得，由发送端计算和存储，接收端进行验证。</p><p><strong>紧急指针</strong>：只有控制位中的URG为1时才有效，指出本报文段中的紧急数据的字节数。</p><p><strong>选项</strong>：其长度可变，定义其他的可选参数。</p><h3 id="粘包与拆包" tabindex="-1"><a class="header-anchor" href="#粘包与拆包" aria-hidden="true">#</a> 粘包与拆包</h3><p>TCP是面向字节流的协议，把上层应用层的数据看成字节流，所以它发送的不是固定大小的数据包，TCP协议也没有字段说明发送数据包的大小。</p><p>而且TCP不保证接受方应用程序收到的数据块和发送应用程序发送的数据块具有对应的大小关系</p><p>比如发送方应用程序交给发送方<code>TCP</code> 10个数据块，接受方TCP可能只用了4个数据块就完整的把接受到的字节流交给了上层应用程序。</p><p>TCP底层并不了解上层业务数据的具体含义，它会根据TCP缓冲区的实际情况进行包的划分，所以在业务上认为，一个完整的包可能会被TCP拆分成多个包进行发送，也有可能把多个小的包封装成一个大的数据包发送，这就是所谓的TCP粘包和拆包问题</p><p><strong>TCP粘包/拆包解决策略</strong></p><p>由于TCP无法理解上一层的业务数据特点，所以TCP是无法保证发送的数据包不发生粘包和拆包，这个问题只能通过上层的协议栈设计来解决，解决思路有一下几种：</p><ul><li><p>消息定长：每个发送的数据包大小固定，比如100字节，不足100字节的用空格补充，接受方取数据的时候根据这个长度来读取数据</p></li><li><p>消息末尾增加换行符来表示一条完整的消息：接收方读取的时候根据换行符来判断是否是一条完整的消息，如果消息的内容也包含换行符，那么这种方式就不合适了。</p></li><li><p>将消息分为消息头和消息尾两部分，消息头指定数据长度，根据消息长度来读取完整的消息，例如UDP协议是这么设计的，用两个字节来表示消息长度，所以UDP不存在粘包和拆包问题。</p></li></ul><h3 id="三次握手" tabindex="-1"><a class="header-anchor" href="#三次握手" aria-hidden="true">#</a> 三次握手</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-f6a9438e-4eb8-4573-9ef5-30e07b8c31df.png" alt=""></p><p><strong>第一次握手</strong>：</p><p>客户端将TCP报文标志位<code>SYN</code>置为1，随机产生一个序号值<code>seq=J</code>，保存在TCP首部的序列号字段里，指明客户端打算连接的服务器的端口，并将该数据包发送给服务器端，发送完毕后，客户端进入<code>SYN_SENT</code>状态，等待服务器端确认。</p><p><strong>第二次握手</strong>：</p><p>服务器端收到数据包后由标志位<code>SYN=1</code>知道客户端请求建立连接，服务器端将TCP报文标志位SYN和ACK都置为1，<code>ack=J+1</code>，随机产生一个序号值<code>seq=K</code>，并将该数据包发送给客户端以确认连接请求，服务器端进入<code>SYN_RCVD</code>状态。</p><p><strong>第三次握手</strong>：</p><p>客户端收到确认后，检查ack是否为<code>J+1</code>，ACK是否为1，如果正确则将标志位ACK置为1，<code>ack=K+1</code>，并将该数据包发送给服务器端，服务器端检查ack是否为<code>K+1</code>，ACK是否为1，如果正确则连接建立成功，客户端和服务器端进入<code>ESTABLISHED</code>状态，完成三次握手，随后客户端与服务器端之间可以开始传输数据了。</p><p><strong>上面写的ack和ACK，不是同一个概念：</strong></p><ul><li><p>小写的ack代表的是头部的确认号Acknowledge number， 缩写ack，是对上一个包的序号进行确认的号，<code>ack=seq+1</code>。</p></li><li><p>大写的ACK，则是我们上面说的TCP首部的标志位，用于标志的TCP包是否对上一个包进行了确认操作，如果确认了，则把ACK标志位设置成1。</p></li></ul><p><strong>TCP为什么三次握手而不是两次握手</strong></p><ul><li><p>为了实现可靠数据传输， TCP 协议的通信双方， 都必须维护一个序列号， 以标识发送出去的数据包中， 哪些是已经被对方收到的。 三次握手的过程即是通信双方相互告知序列号起始值， 并确认对方已经收到了序列号起始值的必经步骤</p></li><li><p>如果只是两次握手， 至多只有连接发起方的起始序列号能被确认， 另一方选择的序列号则得不到确认</p></li></ul><p><strong>《计算机网络》中是这样说的：</strong></p><p>为了防止已失效的连接请求报文段突然又传送到了服务端，因而产生错误。</p><blockquote><p>在书中同时举了一个例子，如下：</p></blockquote><p>假如<code>client</code>发出的第一个连接请求报文段并没有丢失，而是在某个网络结点长时间的滞留了，以致延误到连接释放以后的某个时间才到达<code>server</code>，本来这是一个早已失效的报文段，但<code>server</code>收到此失效的连接请求报文段后，就误认为是client再次发出的一个新的连接请求。</p><p>于是就向client发出确认报文段，同意建立连接，假设不采用<strong>三次握手</strong>，那么只要server发出确认，新的连接就建立了，由于现在client并没有发出建立连接的请求，因此不会理睬server的确认，也不会向server发送数据。</p><p>但server却以为新的连接已经建立，并一直等待<code>client</code>发来数据，这样，server的很多资源就白白浪费掉了。</p><p>采用<strong>三次握手</strong>的办法可以防止上述现象发生，例如刚才那种情况，client不会向<code>server</code>的确认发出确认，server由于收不到确认，就知道client并没有要求建立连接。</p><p><strong>什么是半连接队列</strong></p><p>服务器第一次收到客户端的 SYN 之后，就会处于 <code>SYN_RCVD</code>状态，此时双方还没有完全建立其连接，服务器会把此种状态下请求连接放在一个队列里，我们把这种队列称之为<strong>半连接队列</strong>。</p><p>当然还有一个<strong>全连接队列</strong>，就是已经完成三次握手，建立起连接的就会放在全连接队列中。如果队列满了就有可能会出现丢包现象。</p><p>补充一点关于<strong>SYN-ACK 重传次数</strong>的问题：</p><p>服务器发送完SYN－ACK包，如果未收到客户确认包，服务器进行首次重传，等待一段时间仍未收到客户确认包，进行第二次重传，如果重传次数超过系统规定的最大重传次数，系统将该连接信息从半连接队列中删除。</p><p><strong>三次握手过程中可以携带数据吗</strong></p><p>其实第三次握手的时候，是可以携带数据的，也就是说，第一次、第二次握手不可以携带数据，而第三次握手是可以携带数据的。</p><p>假如第一次握手可以携带数据的话，如果有人要恶意攻击服务器，那他每次都在第一次握手中的 SYN 报文中放入大量的数据，因为攻击者根本就不理服务器的接收、发送能力是否正常，然后疯狂着重复发 SYN 报文的话，这会让服务器花费很多时间、内存空间来接收这些报文。也就是说，第一次握手可以放数据的话，其中一个简单的原因就是会让服务器更加容易受到攻击了。</p><p>而对于第三次的话，此时客户端已经处于 established 状态，也就是说，对于客户端来说，他已经建立起连接了，并且也已经知道服务器的接收、发送能力是正常的了，所以能携带数据没啥毛病。</p><h3 id="四次挥手" tabindex="-1"><a class="header-anchor" href="#四次挥手" aria-hidden="true">#</a> 四次挥手</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-4a5e455f-5cf8-47a6-8fe4-a4c83a445f77.png" alt=""></p><p>挥手请求可以是Client端，也可以是Server端发起的，我们假设是Client端发起：</p><ul><li><p>第一次挥手： Client端发起挥手请求，向Server端发送标志位是FIN报文段，设置序列号seq，此时，Client端进入<code>FIN_WAIT_1</code>状态，这表示Client端没有数据要发送给Server端了。</p></li><li><p>第二次挥手：Server端收到了Client端发送的FIN报文段，向Client端返回一个标志位是ACK的报文段，ack设为seq加1，Client端进入<code>FIN_WAIT_2</code>状态，Server端告诉Client端，我确认并同意你的关闭请求。</p></li><li><p>第三次挥手： Server端向Client端发送标志位是FIN的报文段，请求关闭连接，同时Client端进入<code>LAST_ACK</code>状态。</p></li><li><p>第四次挥手 ： Client端收到Server端发送的FIN报文段，向Server端发送标志位是ACK的报文段，然后Client端进入<code>TIME_WAIT</code>状态，Server端收到Client端的ACK报文段以后，就关闭连接，此时，Client端等待2MSL的时间后依然没有收到回复，则证明Server端已正常关闭，那好，Client端也可以关闭连接了。</p></li></ul><p><strong>为什么连接的时候是三次握手，关闭的时候却是四次握手？</strong></p><p>建立连接时因为当Server端收到Client端的SYN连接请求报文后，可以直接发送SYN+ACK报文。其中ACK报文是用来应答的，SYN报文是用来同步的。所以建立连接只需要三次握手。</p><p>由于TCP协议是一种面向连接的、可靠的、基于字节流的运输层通信协议，TCP是全双工模式。</p><p>这就意味着，关闭连接时，当Client端发出FIN报文段时，只是表示Client端告诉Server端数据已经发送完毕了。当Server端收到FIN报文并返回ACK报文段，表示它已经知道Client端没有数据发送了，但是Server端还是可以发送数据到Client端的，所以Server很可能并不会立即关闭SOCKET，直到Server端把数据也发送完毕。</p><p>当Server端也发送了FIN报文段时，这个时候就表示Server端也没有数据要发送了，就会告诉Client端，我也没有数据要发送了，之后彼此就会愉快的中断这次TCP连接。</p><p><strong>为什么TIME_WAIT要等待2MSL？</strong></p><p>MSL：报文段最大生存时间，它是任何报文段被丢弃前在网络内的最长时间。</p><p>有以下两个原因：</p><ul><li>第一点：保证TCP协议的全双工连接能够可靠关闭： 由于IP协议的不可靠性或者是其它网络原因，导致了Server端没有收到Client端的ACK报文，那么Server端就会在超时之后重新发送FIN，如果此时Client端的连接已经关闭处于<code>CLOESD</code>状态，那么重发的FIN就找不到对应的连接了，从而导致连接错乱，所以，Client端发送完最后的ACK不能直接进入<code>CLOSED</code>状态，而要保持<code>TIME_WAIT</code>，当再次收到FIN的时候，能够保证对方收到ACK，最后正确关闭连接。</li><li>第二点：保证这次连接的重复数据段从网络中消失 如果Client端发送最后的ACK直接进入<code>CLOSED</code>状态，然后又再向Server端发起一个新连接，这时不能保证新连接的与刚关闭的连接的端口号是不同的，也就是新连接和老连接的端口号可能一样了，那么就可能出现问题：如果前一次的连接某些数据滞留在网络中，这些延迟数据在建立新连接后到达Client端，由于新老连接的端口号和IP都一样，TCP协议就认为延迟数据是属于新连接的，新连接就会接收到脏数据，这样就会导致数据包混乱，所以TCP连接需要在<code>TIME_WAIT</code>状态等待2倍MSL，才能保证本次连接的所有数据在网络中消失。</li></ul><h3 id="流量控制" tabindex="-1"><a class="header-anchor" href="#流量控制" aria-hidden="true">#</a> 流量控制</h3><p><strong>RTT和RTO</strong></p><p>RTT：发送一个数据包到收到对应的ACK，所花费的时间</p><p>RTO：重传时间间隔（TCP在发送一个数据包后会启动一个重传定时器，RTO即定时器的重传时间）</p><p>开始预先算一个定时器时间，如果回复ACK，重传定时器就自动失效，即不需要重传；如果没有回复ACK，RTO定时器时间就到了，重传。</p><p>RTO是本次发送当前数据包所预估的超时时间，RTO不是固定写死的配置，是经过RTT计算出来的。</p><p><strong>滑动窗口</strong></p><p>TCP的滑动窗口主要有两个作用：</p><ol><li><p>保证TCP的可靠性</p></li><li><p>保证TCP的流控特性</p></li></ol><p>TCP报文头有个字段叫Window，用于接收方通知发送方自己还有多少缓存区可以接收数据，发送方根据接收方的处理能力来发送数据，不会导致接收方处理不过来，这便是流量控制。</p><p>发送方都维持了一个连续的允许发送的帧的序号，称为发送窗口；同时，接收方也维持了一个连续的允许接收的帧的序号，称为接收窗口。</p><p>发送窗口和接收窗口的序号的上下界不一定要一样，甚至大小也可以不同。</p><p>不同的滑动窗口协议窗口大小一般不同。</p><p>发送方窗口内的序列号代表了那些已经被发送，但是还没有被确认的帧，或者是那些可以被发送的帧</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-d734c97b-d7d6-4af6-8674-524a81fb4dbe.png" alt=""></p><p>滑动窗口由四部分组成每个字节的数据都有唯一顺序的编码，随着时间发展，未确认部分与可以发送数据包编码部分向右移动，形式滑动窗口</p><ol><li><code>绿色</code>：发送成功并已经ACK确认的数据</li><li><code>黄色</code>：发送成功等待ACK确认的数据(占用滑动窗口大小)</li><li><code>紫色</code>：滑动窗口剩余大小可以发送的字节数量(滑动窗口可用大小)</li><li><code>灰色</code>：后续数据编码</li></ol><p>接收窗口的大小就是滑动窗口的最大值，数据传输过程中滑动窗口的可用大小是动态变化的。</p><p>但是还有这么一点，滑动窗口的设计仅仅是考虑到了处理方的处理能力，但是没有考虑到道路的通畅问题</p><p>就好像服务端可以处理100M数据，但是传输的数据99M都堵在路上了，这不就是导致道路阻塞了么？这就需要另外一个设计<strong>拥塞避免</strong></p><p><strong>流量控制的目的</strong></p><p>如果发送者发送数据过快，接收者来不及接收，那么就会有分组丢失。</p><p>为了避免分组丢失，控制发送者的发送速度，使得接收者来得及接收，这就是流量控制。</p><p>流量控制根本目的是防止分组丢失，它是构成TCP可靠性的一方面。</p><p><strong>如何实现流量控制</strong></p><p>由滑动窗口协议（连续ARQ协议）实现。滑动窗口协议既保证了分组无差错、有序接收，也实现了流量控制。</p><p>主要的方式就是接收方返回的 ACK 中会包含自己的接收窗口的大小，并且利用大小来控制发送方的数据发送。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-4bdc0051-8878-4ffc-b9db-71b73ec49cd0.png" alt=""></p><p><strong>流量控制引发的死锁</strong></p><p>当发送者收到了一个窗口为0的应答，发送者便停止发送，等待接收者的下一个应答。</p><p>但是如果这个窗口不为0的应答在传输过程丢失，发送者一直等待下去，而接收者以为发送者已经收到该应答，等待接收新数据，这样双方就相互等待，从而产生死锁。</p><p>为了避免流量控制引发的死锁，TCP使用了<strong>持续计时器</strong>。每当发送者收到一个零窗口的应答后就启动该计时器。时间一到便主动发送报文询问接收者的窗口大小。若接收者仍然返回零窗口，则重置该计时器继续等待；若窗口不为0，则表示应答报文丢失了，此时重置发送窗口后开始发送，这样就避免了死锁的产生。</p><h3 id="拥塞控制" tabindex="-1"><a class="header-anchor" href="#拥塞控制" aria-hidden="true">#</a> 拥塞控制</h3><p><strong>为什么要进行拥塞控制</strong></p><p>假设网络已经出现拥塞，如果不处理拥塞，那么延时增加，出现更多丢包，触发发送方重传数据，加剧拥塞情况，继续恶性循环直至网络瘫痪。</p><p>拥塞控制与流量控制的适应场景和目的均不同。</p><p>拥塞发生前，可避免流量过快增长拖垮网络；拥塞发生时，唯一的选择就是降低流量。</p><p>主要使用4种算法完成拥塞控制：</p><ol><li>慢启动</li><li>拥塞避免</li><li>快重传算法</li><li>快速恢复算法</li></ol><p>算法1、2适用于拥塞发生前，算法3适用于拥塞发生时，算法4适用于拥塞解决后（相当于拥塞发生前）。</p><p><strong>rwnd与cwnd</strong></p><p><code>rwnd</code>（Receiver Window，接收者窗口）与<code>cwnd</code>（Congestion Window，拥塞窗口）：</p><ul><li><p>rwnd是用于流量控制的窗口大小，主要取决于接收方的处理速度，由接收方通知发送方被动调整。</p></li><li><p>cwnd是用于拥塞处理的窗口大小，取决于网络状况，由发送方探查网络主动调整。</p></li></ul><p>同时考虑流量控制与拥塞处理，则发送方窗口的大小不超过<code>min{rwnd, cwnd}</code>。</p><p><strong>慢启动算法</strong></p><p>慢开始算法的思路就是，不要一开始就发送大量的数据，先探测一下网络的拥塞程度，也就是说由小到大逐渐增加拥塞窗口的大小。</p><p>这里用报文段的个数作为拥塞窗口的大小举例说明慢开始算法，实际的拥塞窗口大小是以字节为单位的。</p><p>一个传输轮次所经历的时间其实就是往返时间RTT，而且每经过一个传输轮次，拥塞窗口cwnd就加倍。</p><p>为了防止cwnd增长过大引起网络拥塞，还需设置一个慢开始门限ssthresh状态变量。</p><blockquote><p>ssthresh的用法如下：</p></blockquote><ul><li><p>cwnd&lt;ssthresh时，使用慢开始算法。</p></li><li><p>当cwnd&gt;ssthresh时，改用拥塞避免算法。</p></li><li><p>当cwnd=ssthresh时，慢开始与拥塞避免算法任意</p></li></ul><p>注意，这里的慢并不是指cwnd的增长速率慢，而是指在TCP开始发送报文段时先设置cwnd=1，然后逐渐增大，这当然比按照大的cwnd一下子把许多报文段突然注入到网络中要慢得多。</p><p><strong>拥塞避免算法</strong></p><p>让拥塞窗口cwnd缓慢地增大，即每经过一个往返时间RTT就把发送方的拥塞窗口cwnd加1，而不是加倍。</p><p>这样拥塞窗口cwnd按线性规律缓慢增长，比慢开始算法的拥塞窗口增长速率缓慢得多</p><p>无论是在慢开始阶段还是在拥塞避免阶段，只要发送方判断网络出现拥塞（其根据就是没有按时收到确认，虽然没有收到确认可能是其他原因的分组丢失，但是因为无法判定，所以都当做拥塞来处理），就把慢开始门限ssthresh设置为出现拥塞时的发送窗口大小的一半（但不能小于2）。</p><p>然后把拥塞窗口cwnd重新设置为1，执行慢开始算法。</p><p>这样做的目的就是要迅速减少主机发送到网络中的分组数，使得发生拥塞的路由器有足够时间把队列中积压的分组处理完毕。</p><p><strong>整个拥塞控制的流程：</strong></p><p>假定cwnd=24时，网络出现超时（拥塞），则更新后的ssthresh=12，cwnd重新设置为1，并执行慢开始算法。</p><p>当cwnd=12=ssthresh时，改为执行拥塞避免算法</p><p>注意：拥塞避免并非完全能够避免了阻塞，而是使网络比较不容易出现拥塞。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-314eba07-1388-4e8b-9307-8dd8d03b0dfe.png" alt=""></p><p><strong>快重传算法</strong></p><p>快重传要求接收方在收到一个失序的报文段后就立即发出重复确认（为的是使发送方及早知道有报文段没有到达对方，可提高网络吞吐量约20%）而不要等到自己发送数据时捎带确认。</p><p>快重传算法规定，发送方只要一连收到三个重复确认就应当立即重传对方尚未收到的报文段，而不必继续等待设置的重传计时器时间到期</p><p><strong>快恢复算法</strong></p><p>快重传配合使用的还有快恢复算法，有以下两个要点：</p><ul><li><p>当发送方连续收到三个重复确认时，就把ssthresh门限减半（为了预防网络发生拥塞）。</p></li><li><p>但是接下去并不执行慢开始算法</p></li></ul><p>考虑到如果网络出现拥塞的话就不会收到好几个重复的确认，所以发送方现在认为网络可能没有出现拥塞。</p><p>所以此时不执行慢开始算法，而是将cwnd设置为ssthresh减半后的值，然后执行拥塞避免算法，使cwnd缓慢增大。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-3a424e43-405f-494d-b700-093781b63035.png" alt=""></p><h3 id="socket" tabindex="-1"><a class="header-anchor" href="#socket" aria-hidden="true">#</a> Socket</h3><p>即套接字，是应用层 与 <code>TCP/IP</code> 协议族通信的中间软件抽象层，表现为一个封装了 TCP / IP协议族 的编程接口（API）</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-eff20ef6-9d35-4075-8c53-ab52c7a46ac7.png" alt=""></p><p><code>Socket</code>不是一种协议，而是一个编程调用接口（<code>API</code>），属于传输层（主要解决数据如何在网络中传输）</p><p>对用户来说，只需调用Socket去组织数据，以符合指定的协议，即可通信</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><h2 id="udp" tabindex="-1"><a class="header-anchor" href="#udp" aria-hidden="true">#</a> UDP</h2><p><strong>UDP协议特点</strong></p><ul><li><p>UDP是无连接的传输层协议；</p></li><li><p>UDP使用尽最大努力交付，不保证可靠交付；</p></li><li><p>UDP是面向报文的，对应用层交下来的报文，不合并，不拆分，保留原报文的边界；</p></li><li><p>UDP没有拥塞控制，因此即使网络出现拥塞也不会降低发送速率；</p></li><li><p>UDP支持一对一　一对多　多对多的交互通信；</p></li><li><p>UDP的首部开销小，只有８字节</p></li></ul><p><strong>TCP和UDP的区别</strong></p><ul><li><p>TCP是可靠传输，UDP是不可靠传输;</p></li><li><p>TCP面向连接，UDP无连接;</p></li><li><p>TCP传输数据有序，UDP不保证数据的有序性;</p></li><li><p>TCP不保存数据边界，UDP保留数据边界;</p></li><li><p>TCP传输速度相对UDP较慢;</p></li><li><p>TCP有流量控制和拥塞控制，UDP没有;</p></li><li><p>TCP是重量级协议，UDP是轻量级协议;</p></li><li><p>TCP首部较长20字节，UDP首部较短８字节;</p></li></ul><p><strong>基于TCP和UDP的常用协议</strong></p><p>HTTP、HTTPS、FTP、TELNET、SMTP(简单邮件传输协议)协议基于可靠的TCP协议。</p><p>TFTP、DNS、DHCP、TFTP、SNMP(简单网络管理协议)、RIP基于不可靠的UDP协议</p><h3 id="报文段-1" tabindex="-1"><a class="header-anchor" href="#报文段-1" aria-hidden="true">#</a> 报文段</h3><p>UDP的报文段共有2个字段：数据字段 + 首部字段</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-a5d0d209-01db-4ee7-b63b-bf2659545702.png" alt=""></p><p><strong>UDP报文中每个字段的含义如下：</strong></p><ul><li>源端口：这个字段占据 UDP 报文头的前 16 位，通常包含发送数据报的应用程序所使用的 UDP 端口，接收端的应用程序利用这个字段的值作为发送响应的目的地址，这个字段是可选的，所以发送端的应用程序不一定会把自己的端口号写入该字段中，如果不写入端口号，则把这个字段设置为 0，这样，接收端的应用程序就不能发送响应了。</li><li>目的端口：接收端计算机上 UDP 软件使用的端口，占据 16 位。</li><li>长度：该字段占据 16 位，表示 UDP 数据报长度，包含 UDP 报文头和 UDP 数据长度，因为 UDP 报文头长度是 8 个字节，所以这个值最小为 8。</li><li>校验值：该字段占据 16 位，可以检验数据在传输过程中是否被损坏。</li></ul><h2 id="网络层" tabindex="-1"><a class="header-anchor" href="#网络层" aria-hidden="true">#</a> 网络层</h2><h3 id="mac地址" tabindex="-1"><a class="header-anchor" href="#mac地址" aria-hidden="true">#</a> MAC地址</h3><p>MAC称为物理地址，也叫硬件地址，用来定义网络设备的位置，MAC地址是网卡出厂时设定的，是固定的（但可以通过在设备管理器中或注册表等方式修改，同一网段内的MAC地址必须唯一）。</p><p>MAC地址采用十六进制数表示，长度是6个字节（48位），分为前24位和后24位。</p><blockquote><p>MAC地址对应于OSI参考模型的第二层数据链路层，工作在数据链路层的交换机维护着计算机MAC地址和自身端口的数据库，交换机根据收到的数据帧中的目的MAC地址字段来转发数据帧。</p></blockquote><h3 id="ip地址" tabindex="-1"><a class="header-anchor" href="#ip地址" aria-hidden="true">#</a> IP地址</h3><p>常见的IP地址分为IPv4与IPv6两大类，当前广泛应用的是IPv4，目前IPv4几乎耗尽，下一阶段必然会进行版本升级到IPv6；</p><p>IP地址是以网络号和主机号来标示网络上的主机的，我们把网络号相同的主机称之为本地网络，网络号不相同的主机称之为远程网络主机</p><p>本地网络中的主机可以直接相互通信；远程网络中的主机要相互通信必须通过本地网关（Gateway）来传递转发数据。</p><p>IP地址对应于OSI参考模型的第三层网络层，工作在网络层的路由器根据目标IP和源IP来判断是否属于同一网段，如果是不同网段，则转发数据包。</p><p><strong>IP地址格式和表示</strong></p><p>IP地址(IPv4)由32位二进制数组成，分为4段（4个字节），每一段为8位二进制数（1个字节）</p><p>每一段8位二进制，中间使用英文的标点符号<code>.</code>隔开</p><p>由于二进制数太长，为了便于记忆和识别，把每一段8位二进制数转成十进制，大小为0至255。</p><p>IP地址的这种表示法叫做<strong>点分十进制表示法</strong>。</p><p>IP地址表示为：<code>xxx.xxx.xxx.xxx</code></p><p>举个栗子：<code>210.21.196.6</code>就是一个IP地址的表示。</p><p>计算机的IP地址由两部分组成，一部分为网络标识，一部分为主机标识，同一网段内的计算机网络部分相同，主机部分不能同时重复出现。</p><p><strong>路由器</strong>连接不同网段，负责不同网段之间的数据转发，<strong>交换机</strong>连接的是同一网段的计算机。</p><p>通过设置网络地址和主机地址，在互相连接的整个网络中保证每台主机的IP地址不会互相重叠，即IP地址具有了唯一性。</p><p><strong>IP地址分类详解</strong></p><p>IP地址分A、B、C、D、E五类，其中A、B、C这三类是比较常用的IP地址，D、E类为特殊地址。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-212f3f9b-b07f-4cc9-81eb-55bb478f1b66.png" alt=""></p><h3 id="子网掩码" tabindex="-1"><a class="header-anchor" href="#子网掩码" aria-hidden="true">#</a> 子网掩码</h3><p><strong>子网掩码的概念及作用</strong></p><p>通过子网掩码，才能表明一台主机所在的子网与其他子网的关系，使网络正常工作。</p><p>子网掩码和IP地址做与运算，分离出IP地址中的网络地址和主机地址，用于判断该IP地址是在本地网络上，还是在远程网络网上。</p><p>子网掩码还用于将网络进一步划分为若干子网，以避免主机过多而拥堵或过少而IP浪费。</p><p><strong>子网掩码的组成</strong></p><p>同IP地址一样，子网掩码是由长度为32位二进制数组成的一个地址。</p><p>子网掩码32位与IP地址32位相对应，IP地址如果某位是网络地址，则子网掩码为1，否则为0。</p><p>举个栗子：如：<code>11111111.11111111.11111111.00000000</code></p><blockquote><p>左边连续的1的个数代表网络号的长度，（使用时必须是连续的，理论上也可以不连续），右边连续的0的个数代表主机号的长度。</p></blockquote><p><strong>为什么要使用子网掩码</strong></p><p>两台主机要通信，首先要判断是否处于同一网段，即网络地址是否相同。</p><p>如果相同，那么可以把数据包直接发送到目标主机，否则就需要路由网关将数据包转发送到目的地。</p><blockquote><p>可以这么简单的理解：A主机要与B主机通信，A和B各自的IP地址与A主机的子网掩码进行And与运算，看得出的结果：</p><p>1、结果如果相同，则说明这两台主机是处于同一个网段，这样A可以通过ARP广播发现B的MAC地址，B也可以发现A的MAC地址来实现正常通信。</p><p>2、如果结果不同，ARP广播会在本地网关终结，这时候A会把发给B的数据包先发给本地网关，网关再根据B主机的IP地址来查询路由表，再将数据包继续传递转发，最终送达到目的地B。</p></blockquote><hr><blockquote><p>计算机的网关（Gateway）就是到其他网段的出口，也就是路由器接口IP地址。</p><p>路由器接口使用的IP地址可以是本网段中任何一个地址，不过通常使用该网段的第一个可用的地址或最后一个可用的地址，这是为了尽可能避免和本网段中的主机地址冲突。</p></blockquote><p>在如下拓扑图示例中，A与B，C与D，都可以直接相互通信（都是属于各自同一网段，不用经过路由器）</p><p>但是A与C，A与D，B与C，B与D它们之间不属于同一网段，所以它们通信是要经过本地网关，然后路由器根据对方IP地址，在路由表中查找恰好有匹配到对方IP地址的直连路由，于是从另一边网关接口转发出去实现互连</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-e1d68baa-9d8c-4595-bcb5-0dc5f6e240fe.png" alt=""></p><p><strong>子网掩码和IP地址的关系</strong></p><p>子网掩码是用来判断任意两台主机的IP地址是否属于同一网络的依据</p><p>拿双方主机的IP地址和自己主机的子网掩码做与运算，如结果为同一网络，就可以直接通信</p><p><strong>如何根据IP地址和子网掩码，计算网络地址：</strong></p><p>将IP地址与子网掩码转换成二进制数。</p><p>将二进制形式的 IP 地址与子网掩码做与运算。</p><p>将得出的结果转化为十进制，便得到网络地址。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-5fab32f0-20d1-4c05-bfb9-47928ceac65d.png" alt=""></p><h3 id="网关" tabindex="-1"><a class="header-anchor" href="#网关" aria-hidden="true">#</a> 网关</h3><p>网关实质上是一个网络通向其他网络的IP地址。</p><p>比如有网络A和网络B，网络A的IP地址范围为<code>192.168.1.1~192. 168.1.254</code>，子网掩码为<code>255.255.255.0</code>；</p><p>网络B的IP地址范围为<code>192.168.2.1~192.168.2.254</code>，子网掩码为<code>255.255.255.0</code>。</p><p>在没有路由器的情况下，两个网络之间是不能进行TCP/IP通信的，即使是两个网络连接在同一台交换机(或集线器)上，TCP/IP协议也会根据子网掩码(<code>255.255.255.0</code>)判定两个网络中的主机处在不同的网络里。</p><p>而要实现这两个网络之间的通信，则必须通过网关。</p><p>如果网络A中的主机发现数据包的目的主机不在本地网络中，就把数据包转发给它自己的网关，再由网关转发给网络B的网关，网络B的网关再转发给网络B的某个主机。网络B向网络A转发数据包的过程。</p><p><strong>所以说，只有设置好网关的IP地址，TCP/IP协议才能实现不同网络之间的相互通信。</strong></p><blockquote><p>那么这个IP地址是哪台机器的IP地址呢？</p></blockquote><p>网关的IP地址是具有路由功能的设备的IP地址，具有路由功能的设备有路由器、启用了路由协议的服务器(实质上相当于一台路由器)、代理服务器(也相当于一台路由器)。</p><h3 id="ping" tabindex="-1"><a class="header-anchor" href="#ping" aria-hidden="true">#</a> Ping</h3><p>Ping是我们测试网络连接的常用指令。</p><p>它利用ICMP报文检测网络连接。</p><p><strong>假设A ping B</strong></p><ol><li><p>ping通知系统建立一个固定格式的ICMP请求数据包。</p></li><li><p>ICMP协议打包这个数据包和B的IP地址转交给IP协议层</p></li><li><p>IP层协议将机器B的IP地址为目的地址，本机的IP地址为源地址，加上一些头部必要的控制信息，构建一个IP数据包</p></li><li><p>获取B的MAC地址，做这个操作首先机器A会判断B是否在同一网段内，若IP层协议通过B的IP地址和自己的子网掩码，发现它跟自己属于同一网络，就直接在本网络查找这台机器的MAC，否则则通过路由器进行类似查找。</p></li></ol><blockquote><p>接下来是ARP协议根据IP地址查找MAC地址的过程:</p></blockquote><ul><li><p>若两台机器之前有过通信，在机器A的ARP缓存表里应该存有B的IP与其MAC地址的映射关系。</p></li><li><p>若没有，则通过发送ARP请求广播，得到回应的B机器MAC地址，并交给数据链路层</p></li></ul><ol start="5"><li><p>数据链路层构建一个数据帧，目的地址是IP层传过来的MAC地址，源地址是本机的MAC地址，再附加一些必要的控制信息，依据以太网的介质访问规则将他们传送出去</p></li><li><p>机器B收到这个数据帧后，先检查目的地址，和本机MAC地址对比：</p></li></ol><p>符合，接受，接收后检查该数据帧，将IP数据包从帧中提取出来，交给本机的的IP地址协议层协议，IP协议层检查之后，将有用的信息提取给ICMP协议，后者处理，马上构建一个ICMP应答包，发送给A，其过程和主机A发送ICMP请求包到B的过程类似，但不用ARP广播收取A的信息，因为请求包中已经有足够的信息用于B回应A。</p><p>若不符合，丢弃。</p><p>可以知道PING的过程即一段发送报文和接受确认报文的过程，在来回直接可以计算时延。</p><h3 id="dns" tabindex="-1"><a class="header-anchor" href="#dns" aria-hidden="true">#</a> DNS</h3><p>DNS通过主机名，最终得到该主机名对应的IP地址的过程叫做域名解析（或主机名解析）。</p><p><strong>通俗的讲</strong>，我们更习惯于记住一个网站的名字，www.baidu.com，而不是记住它的ip地址，比如：167.23.10.2</p><p><strong>工作原理</strong></p><p>将主机域名转换为ip地址，属于应用层协议，使用UDP传输。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-7d129644-dfa7-4151-ae2f-9f3f084c6be9.png" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-4ed70ed6-ceeb-4761-8fd4-eb2fe092273d.png" alt=""></p><p>第一步，客户端向本地DNS服务器发送解析请求</p><p>第二步，本地DNS如有相应记录会直接返回结果给客户端，如没有就向DNS根服务器发送请求</p><p>第三步,DSN根服务器接收到请求，返回给本地服务器一个所查询域的主域名服务器的地址</p><p>第四步，本地dns服务器再向返回的主域名服务器地址发送查询请求</p><p>第五步，主域名服务器如有记录就返回结果，没有的话返回相关的下级域名服务器地址</p><p>第六步，本地DNS服务器继续向接收到的地址进行查询请求</p><p>第七步，下级域名服务器有相应记录，返回结果</p><p>第八步，本地dns服务器将收到的返回地址发给客户端，同时写入自己的缓存，以便下次查询</p><p>DNS域名查询实际上就是个不断递归查询的过程，直到查找到相应结果，需要注意的时，当找不到相应记录，会返回空结果，而不是超时信息</p><h4 id="dns记录" tabindex="-1"><a class="header-anchor" href="#dns记录" aria-hidden="true">#</a> DNS记录</h4><blockquote><p>A记录</p></blockquote><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>定义www.example.com的ip地址
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clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">五、计算机基础</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/cs/os.html" class="nav-link sidebar-link sidebar-page" aria-label="计算机操作系统"><!---->计算机操作系统<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/cs/wangluo.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="计算机网络"><!---->计算机网络<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" 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href="/cs/wangluo.html#路由器" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="路由器"><!---->路由器<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/wangluo.html#http" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="HTTP"><!---->HTTP<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/cs/wangluo.html#状态码" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="状态码"><!---->状态码<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/wangluo.html#http1-1" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="HTTP1.1"><!---->HTTP1.1<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/wangluo.html#http2-0" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="HTTP2.0"><!---->HTTP2.0<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/wangluo.html#http3-0" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="HTTP3.0"><!---->HTTP3.0<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/wangluo.html#https" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="HTTPS"><!---->HTTPS<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/wangluo.html#请求报文" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="请求报文"><!---->请求报文<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/wangluo.html#响应报文" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="响应报文"><!---->响应报文<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/wangluo.html#tcp" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="TCP"><!---->TCP<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/cs/wangluo.html#报文段" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="报文段"><!---->报文段<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/wangluo.html#粘包与拆包" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="粘包与拆包"><!---->粘包与拆包<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/wangluo.html#三次握手" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="三次握手"><!---->三次握手<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/wangluo.html#四次挥手" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="四次挥手"><!---->四次挥手<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/wangluo.html#流量控制" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="流量控制"><!---->流量控制<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/wangluo.html#拥塞控制" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="拥塞控制"><!---->拥塞控制<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/wangluo.html#socket" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="Socket"><!---->Socket<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/wangluo.html#udp" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="UDP"><!---->UDP<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/cs/wangluo.html#报文段-1" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="报文段"><!---->报文段<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/wangluo.html#网络层" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="网络层"><!---->网络层<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/cs/wangluo.html#mac地址" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="MAC地址"><!---->MAC地址<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/wangluo.html#ip地址" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="IP地址"><!---->IP地址<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/wangluo.html#子网掩码" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="子网掩码"><!---->子网掩码<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/wangluo.html#网关" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="网关"><!---->网关<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/wangluo.html#ping" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="Ping"><!---->Ping<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/wangluo.html#dns" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="DNS"><!---->DNS<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/wangluo.html#arp协议" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="ARP协议"><!---->ARP协议<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/wangluo.html#数字签名" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="数字签名"><!---->数字签名<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/wangluo.html#sql注入" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="SQL注入"><!---->SQL注入<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/wangluo.html#加密算法" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="加密算法"><!---->加密算法<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/cs/wangluo.html#对称加密" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="对称加密"><!---->对称加密<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/wangluo.html#非对称加密" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="非对称加密"><!---->非对称加密<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/wangluo.html#网络攻击" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="网络攻击"><!---->网络攻击<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/cs/wangluo.html#csrf和xss" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="CSRF和XSS"><!---->CSRF和XSS<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/wangluo.html#dos攻击" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="DOS攻击"><!---->DOS攻击<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/wangluo.html#cookie和session" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="Cookie和Session"><!---->Cookie和Session<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/cs/wangluo.html#常见面试题" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="常见面试题"><!---->常见面试题<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->计算机网络核心知识点大梳理</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月31日</span><meta property="datePublished" content="2022-03-31T02:38:06.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category4" role>计算机基础</li><meta property="articleSection" content="计算机基础"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 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123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 73 分钟</span><meta property="timeRequired" content="PT73M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/cs/wangluo.html#osi七层模型" class="router-link-active router-link-exact-active toc-link level2">OSI七层模型</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cs/wangluo.html#tcp和ip模型" class="router-link-active router-link-exact-active toc-link level2">TCP和IP模型</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cs/wangluo.html#网络设备" class="router-link-active router-link-exact-active toc-link level2">网络设备</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/cs/wangluo.html#交换机" class="router-link-active router-link-exact-active toc-link level3">交换机</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cs/wangluo.html#路由器" class="router-link-active router-link-exact-active toc-link level3">路由器</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cs/wangluo.html#http" class="router-link-active router-link-exact-active toc-link level2">HTTP</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/cs/wangluo.html#状态码" class="router-link-active router-link-exact-active toc-link level3">状态码</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cs/wangluo.html#http1-1" class="router-link-active router-link-exact-active toc-link level3">HTTP1.1</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cs/wangluo.html#http2-0" class="router-link-active router-link-exact-active toc-link level3">HTTP2.0</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cs/wangluo.html#http3-0" class="router-link-active router-link-exact-active toc-link level3">HTTP3.0</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cs/wangluo.html#https" class="router-link-active router-link-exact-active toc-link level3">HTTPS</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cs/wangluo.html#请求报文" class="router-link-active router-link-exact-active toc-link level3">请求报文</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cs/wangluo.html#响应报文" class="router-link-active router-link-exact-active toc-link level3">响应报文</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cs/wangluo.html#tcp" class="router-link-active router-link-exact-active toc-link level2">TCP</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/cs/wangluo.html#报文段" class="router-link-active router-link-exact-active toc-link level3">报文段</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cs/wangluo.html#粘包与拆包" class="router-link-active router-link-exact-active toc-link level3">粘包与拆包</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cs/wangluo.html#三次握手" class="router-link-active router-link-exact-active toc-link level3">三次握手</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cs/wangluo.html#四次挥手" class="router-link-active router-link-exact-active toc-link level3">四次挥手</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cs/wangluo.html#流量控制" class="router-link-active router-link-exact-active toc-link level3">流量控制</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cs/wangluo.html#拥塞控制" class="router-link-active router-link-exact-active toc-link level3">拥塞控制</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cs/wangluo.html#socket" class="router-link-active router-link-exact-active toc-link level3">Socket</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cs/wangluo.html#udp" class="router-link-active router-link-exact-active toc-link level2">UDP</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/cs/wangluo.html#报文段-1" class="router-link-active router-link-exact-active toc-link level3">报文段</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cs/wangluo.html#网络层" class="router-link-active router-link-exact-active toc-link level2">网络层</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/cs/wangluo.html#mac地址" class="router-link-active router-link-exact-active toc-link level3">MAC地址</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cs/wangluo.html#ip地址" class="router-link-active router-link-exact-active toc-link level3">IP地址</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cs/wangluo.html#子网掩码" class="router-link-active router-link-exact-active toc-link level3">子网掩码</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cs/wangluo.html#网关" class="router-link-active router-link-exact-active toc-link level3">网关</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cs/wangluo.html#ping" class="router-link-active router-link-exact-active toc-link level3">Ping</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cs/wangluo.html#dns" class="router-link-active router-link-exact-active toc-link level3">DNS</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cs/wangluo.html#arp协议" class="router-link-active router-link-exact-active toc-link level3">ARP协议</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cs/wangluo.html#数字签名" class="router-link-active router-link-exact-active toc-link level2">数字签名</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cs/wangluo.html#sql注入" class="router-link-active router-link-exact-active toc-link level2">SQL注入</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cs/wangluo.html#加密算法" class="router-link-active router-link-exact-active toc-link level2">加密算法</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/cs/wangluo.html#对称加密" class="router-link-active router-link-exact-active toc-link level3">对称加密</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cs/wangluo.html#非对称加密" class="router-link-active router-link-exact-active toc-link level3">非对称加密</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cs/wangluo.html#网络攻击" class="router-link-active router-link-exact-active toc-link level2">网络攻击</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/cs/wangluo.html#csrf和xss" class="router-link-active router-link-exact-active toc-link level3">CSRF和XSS</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cs/wangluo.html#dos攻击" class="router-link-active router-link-exact-active toc-link level3">DOS攻击</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cs/wangluo.html#cookie和session" class="router-link-active router-link-exact-active toc-link level2">Cookie和Session</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/cs/wangluo.html#常见面试题" class="router-link-active router-link-exact-active toc-link level2">常见面试题</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="计算机网络核心知识点大梳理" tabindex="-1"><a class="header-anchor" href="#计算机网络核心知识点大梳理" aria-hidden="true">#</a> 计算机网络核心知识点大梳理</h1><blockquote><p>作者：月伴飞鱼，转载链接：<a href="https://mp.weixin.qq.com/s/7EddtzpwIRvYfw34QE4zvw" target="_blank" rel="noopener noreferrer">https://mp.weixin.qq.com/s/7EddtzpwIRvYfw34QE4zvw<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-608345cf-8378-4b34-bc91-ca6d2fa25da7.png" alt=""></p><h2 id="osi七层模型" tabindex="-1"><a class="header-anchor" href="#osi七层模型" aria-hidden="true">#</a> OSI七层模型</h2><p><strong>物理层</strong></p><p>首先解决两台物理机之间的通信需求，具体就是机器A往机器B发送比特流，机器B能收到比特流。</p><p>物理层主要定义了物理设备的标准，如网线的类型，光纤的接口类型，各种传输介质的传输速率。</p><p>主要作用是传输比特流（<code>0101</code>二进制数据），将比特流转化为电流强弱传输，到达目的后再转化为比特流，即常说的数模转化和模数转换。</p><p>这层数据叫做比特。<strong>网卡工作在这层</strong>。</p><p>物理层是OSI七层模型的物理基础，没有它就谈不上数据传输了</p><p>物理层就是由实物所承载的，所以作比喻的话，公路、汽车和飞机等承载货物（数据）的交通工具，就是物理层的象征</p><p><strong>数据链路层</strong></p><p>在传输比特流的过程中，会产生错传、数据传输不完整的可能。</p><p>数据链路层定义了<strong>如何格式化数据进行传输</strong>，以及如何控制对物理介质的访问。通常提供错误检测和纠正，以确保数据传输的准确性。</p><p>本层将比特数据组成帧，交换机工作在这层，对帧解码，并根据帧中包含的信息把数据发送到正确的接收方。</p><p>该层负责物理层面上互连的节点之间的通信传输。例如与1个以太网相连的两个节点间的通讯。</p><p>常见的协议有 <code>HDLC、PPP、SLIP</code>等</p><p>数据链路层会将<code>0、1</code>序列划分为具有意义的数据帧传送给对端（<strong>数据帧的生成与接收</strong>）</p><p><strong>网络层</strong></p><p>随着网络节点的不断增加，点对点通讯需要通过多个节点，如何找到目标节点，如何选择最佳路径成为首要需求。</p><p>网络层主要功能是将网络地址转化为对应的物理地址，并决定如何将数据从发送方路由到接收方。</p><p>网络层通过综合考虑发送优先权、网络拥塞程度、服务质量以及可选路由的花费来决定从一个网络中节点A到另一个网络中节点B的最佳路径。</p><p>由于网络层处理并智能指导数据传送，路由器连接网络隔断，所以路由器属于网络层。</p><p>此层的数据称之为数据包。本层需要关注的协议<code>TCP/IP</code>协议中的IP协议。</p><p>网络层负责将数据传输到目标地址。目标地址可以使多个网络通过路由器连接而成的某一个地址。因此这一层主要负责<strong>寻址和路由选择</strong>。主要由 <code>IP、ICMP</code> 两个协议组成</p><p>网络层将数据从发送端的主机发送到接收端的主机，两台主机间可能会存在很多数据链路，但网络层就是负责找出一条相对顺畅的通路将数据传递过去。传输的地址使用的是IP地址。IP地址通过不断转发到更近的IP地址，最终可以到达目标地址</p><p><strong>传输层</strong></p><p>随着网络通信需求的进一步扩大，通信过程中需要发送大量的数据，如海量文件传输，可能需要很长时间，网络在通信的过程中会中断很多次，此时为了保证传输大量文件时的准确性，需要对发送出去的数据进行切分，切割为一个一个的段落（<code>Segement</code>）发送，其中一个段落丢失是否重传，段落是否按顺序到达，是传输层需要考虑的问题。</p><p>传输层解决了主机间的数据传输，数据间的传输可以是不同网络，并且传输层解决了<strong>传输质量</strong>的问题。</p><p>传输层需要关注的协议有TCP/IP协议中的<code>TCP</code>协议和<code>UDP</code>协议。</p><p><strong>会话层</strong></p><p>自动收发包，自动寻址。</p><p>会话层作用是<strong>负责建立和断开通信连接</strong>，何时建立，断开连接以及保持多久的连接。常见的协议有 <code>ADSP、RPC</code> 等</p><p><strong>表示层</strong></p><p>Linux给WIndows发包，不同系统语法不一致，如exe不能在<code>Linux</code>下执行，shell不能在Windows不能直接运行。于是需要表示层。</p><p>解决<strong>不同系统之间通信语法问题</strong>，在表示层数据将按照网络能理解的方案进行格式化，格式化因所使用网络的不同而不同。</p><p>它主要负责数据格式的转换。具体来说，就是讲设备固有的数据格式转换为网络标准格式。常见的协议有<code>ASCII、SSL/TLS</code> 等</p><p><strong>应用层</strong></p><p>规定发送方和接收方必须使用一个固定长度的消息头，消息头必须使用某种固定的组成，消息头中必须记录消息体的长度等信息，方便接收方正确解析发送方发送的数据。</p><p>应用层旨在更<strong>方便应用从网络中接收的数据</strong>，重点关注<code>TCP/IP</code>协议中的HTTP协议</p><p>四层传输层数据被称作<strong>段</strong>（Segments）；</p><p>三层网络层数据被称做<strong>包</strong>（Packages）；</p><p>二层数据链路层时数据被称为<strong>帧</strong>（Frames）；</p><p>一层物理层时数据被称为<strong>比特流</strong>（Bits）。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-d1fdc5fc-c955-4591-9c95-e297a64eccdc.png" alt=""></p><h2 id="tcp和ip模型" tabindex="-1"><a class="header-anchor" href="#tcp和ip模型" aria-hidden="true">#</a> TCP和IP模型</h2><p>OSI模型注重通信协议必要的功能；TCP/IP更强调在计算机上实现协议应该开发哪种程序</p><p><strong>TCP/IP划分了四层网络模型</strong></p><ul><li>第一层：应用层，主要有负责web浏览器的HTTP协议， 文件传输的FTP协议，负责电子邮件的SMTP协议，负责域名系统的DNS等</li><li>第二层：传输层，主要是有<strong>可靠传输</strong>的TCP协议，特别<strong>高效</strong>的UDP协议。主要负责传输应用层的数据包。</li><li>第三层：网络层，主要是IP协议。主要负责寻址（找到目标设备的位置）</li><li>第四层：数据链路层，主要是负责转换数字信号和物理二进制信号。</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-fa4a4d20-f0db-4ba7-a31e-7772f2f132a8.png" alt=""></p><p><strong>四层网络协议的作用</strong></p><ul><li>发送端是由上至下，把上层来的数据在头部加上各层协议的数据（部首）再下发给下层。</li><li>接受端则由下而上，把从下层接受到的数据进行解密和去掉头部的部首后再发送给上层。</li><li>层层加密和解密后，应用层最终拿到了需要的数据。</li></ul><p><strong>举个例子：</strong></p><p>我们需要发送一个<strong>index.html</strong>。</p><p>两台电脑在应用层都使用HTTP协议（即都使用浏览器）。</p><p>在传输层，TCP协议会将HTTP协议发送的数据看作一个数据包，并在这个数据包前面加上TCP包的一部分信息（部首）</p><p>在网络层，IP协议会将TCP协议要发送的数据看作一个数据包，同样的在这个数据包前端加上IP协议的部首</p><p>在数据链路层，对应的协议也会在IP数据包前端加上以太网的部首。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-1d3ce227-fd77-4b95-89dd-aeb786bb4b9e.png" alt=""></p><p>源设备和目标设备通过网线连接，就可以通过物理层的二进制传输数据。</p><p>数据链路层，会使用对应的协议找到物理层的二进制数据，解码得到以太网的部首信息和对应的IP数据包，再将IP数据包传给上层的网络层。</p><p>数据链路层&gt;网络层&gt;传输层&gt;应用层，一层层的解码，最后就可以在浏览器中得到目标设备传送过来的<strong>index.html</strong>。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-731f7daa-1b47-4191-828f-c6e54d650604.png" alt=""></p><p><strong>TCP/IP协议族</strong></p><p>从字面意义上来讲，TCP/IP是指<strong>传输层</strong>的TCP协议和<strong>网络层</strong>的IP协议。</p><p>实际上，TCP/IP只是利用 IP 进行通信时所必须用到的协议群的统称。</p><p>具体来说，在网络层是IP/ICMP协议、在传输层是TCP/UDP协议、在应用层是SMTP、FTP、以及 HTTP 等。他们都属于 TCP/IP 协议。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><h2 id="网络设备" tabindex="-1"><a class="header-anchor" href="#网络设备" aria-hidden="true">#</a> 网络设备</h2><h3 id="交换机" tabindex="-1"><a class="header-anchor" href="#交换机" aria-hidden="true">#</a> 交换机</h3><p>交换机可以接入多台电脑</p><p>每个电脑网卡的 <strong>MAC 地址</strong>都是不一样的，电脑发送数据时，数据头部携带网卡的 MAC 地址，用 MAC 地址标识来不同的电脑</p><p>交换机就可以识别数据头部的 MAC 地址来区分不同的电脑</p><p>交换机除了能识别不同的电脑，还需要找到电脑连接的<strong>交换机端口</strong>，才能顺利的把数据从相应端口发送出去</p><p>交换机通过<strong>自学机制</strong>，把学习到的设备 MAC 地址和交换机端口号添加到 <strong>MAC 地址表</strong>，并根据 MAC 地址表进行数据<strong>转发</strong></p><h3 id="路由器" tabindex="-1"><a class="header-anchor" href="#路由器" aria-hidden="true">#</a> 路由器</h3><p>交换机需要记录的 MAC 地址表也越来越多，需要的交换机也越来越多</p><p>但是交换机的<strong>容量和性能有限</strong>，MAC 地址表无法记录全世界电脑的 MAC 地址和对应的端口号，MAC 地址表太大也无法快速查找到对应的 MAC 地址表项</p><p>于是就有了三层网络设备<strong>路由器</strong>，路由器可以把全世界的网络连接起来</p><p>局域网内的网络连接可以使用<strong>交换机</strong>，例如一个公司内的网络或者一个校园内的网络通过交换机连接</p><p>不同区域的局域网互联使用<strong>路由器</strong></p><blockquote><p>那么如何区分不同的网络区域呢？又是如何跨网络区域进行数据转发的呢？</p></blockquote><p>路由器有多个端口，分别连接不同的网络区域，不同网络区域的 IP 地址<strong>网络号不同</strong></p><p>它通过识别目的 IP 地址的<strong>网络号</strong>，再根据<strong>路由表</strong>进行数据转发</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><h2 id="http" tabindex="-1"><a class="header-anchor" href="#http" aria-hidden="true">#</a> HTTP</h2><p><strong>请求方法</strong></p><p>HTTP1.0 定义了三种请求方法： GET, POST 和 HEAD方法。</p><p>HTTP1.1 新增了六种请求方法：OPTIONS、PUT、PATCH、DELETE、TRACE 和 CONNECT 方法。</p><table><thead><tr><th>序 号</th><th>方法</th><th>描述</th></tr></thead><tbody><tr><td>1</td><td>GET</td><td>请求指定的页面信息，并返回实体主体。</td></tr><tr><td>2</td><td>HEAD</td><td>类似于 GET 请求，只不过返回的响应中没有具体的内容，用于获取报头</td></tr><tr><td>3</td><td>POST</td><td>向指定资源提交数据进行处理请求（例如提交表单或者上传文件）。数据被包含在请求体中。POST 请求可能会导致新的资源的建立和/或已有资源的修改。</td></tr><tr><td>4</td><td>PUT</td><td>从客户端向服务器传送的数据取代指定的文档的内容。</td></tr><tr><td>5</td><td>DELETE</td><td>请求服务器删除指定的页面。</td></tr><tr><td>6</td><td>CONNECT</td><td>HTTP/1.1 协议中预留给能够将连接改为管道方式的代理服务器。</td></tr><tr><td>7</td><td>OPTIONS</td><td>允许客户端查看服务器的性能。</td></tr><tr><td>8</td><td>TRACE</td><td>回显服务器收到的请求，主要用于测试或诊断。</td></tr><tr><td>9</td><td>PATCH</td><td>是对 PUT 方法的补充，用来对已知资源进行局部更新 。</td></tr></tbody></table><p><strong>GET请求和POST请求的区别</strong></p><ol><li>GET 请求的请求参数是添加到 head 中，可以在 url 中可以看到；POST 请求的请求参数是添加到body中，在url 中不可见。</li><li>请求的url有长度限制，这个限制由浏览器和 web 服务器决定和设置的，例如IE浏览器对 URL的最大限制为2083个字符，如果超过这个数字，提交按钮没有任何反应，因为GET请求的参数是添加到URL中，所以GET请求的URL的长度限制需要将请求参数长度也考虑进去。而POST请求不用考虑请求参数的长度。</li><li>GET请求产生一个数据包; POST请求产生2个数据包，在火狐浏览器中，产生一个数据包，这个区别点在于浏览器的请求机制，先发送请求头，再发送请求体，因为GET没有请求体，所以就发送一个数据包，而POST包含请求体，所以发送两次数据包，但是由于火狐机制不同，所以发送一个数据包。</li><li>GET 请求会被浏览器主动缓存下来，留下历史记录，而 POST 默认不会。</li><li>GET是幂等的，而POST不是(幂等表示执行相同的操作，结果也是相同的)</li><li>GET是获取数据，POST是修改数据</li></ol><h3 id="状态码" tabindex="-1"><a class="header-anchor" href="#状态码" aria-hidden="true">#</a> 状态码</h3><p><strong>状态码由3位数字组成，第一位定义响应的类别</strong></p><p>1XX：指示信息，表示请求以接收，继续处理</p><p>2XX：成功，表示请求已经被成功接收、理解、接受</p><ul><li><p>200 OK 是最常见的成功状态码，表示一切正常。如果是非 HEAD 请求，服务器返回的响应头都会有 body 数据。</p></li><li><p>204 No Content 也是常见的成功状态码，与 200 OK 基本相同，但响应头没有 body 数据。</p></li><li><p>206 Partial Content 是应用于 HTTP 分块下载或断电续传，表示响应返回的 body 数据并不是资源的全部，而是其中的一部分，也是服务器处理成功的状态。</p></li></ul><p>3XX：状态码表示客户端请求的资源发送了变动，需要客户端用新的 URL 重新发送请求获取资源，也就是<strong>重定向</strong>。</p><ul><li>301 Moved Permanently 表示永久重定向，说明请求的资源已经不存在了，需改用新的 URL 再次访问，搜索引擎在抓取新内容的同时也将旧的网址交换为重定向之后的网址。</li><li>302 Moved Permanently 表示临时重定向，说明请求的资源还在，但暂时需要用另一个 URL 来访问，搜索引擎会抓取新的内容而保存旧的网址。</li></ul><p>301 和 302 都会在响应头里使用字段 Location，指明后续要跳转的 URL，浏览器会自动重定向新的 URL。</p><ul><li>304 Not Modified不具有跳转的含义，表示资源未修改，重定向已存在的缓冲文件，也称缓存重定向，用于缓存控制。</li></ul><p>4XX：状态码表示客户端发送的<strong>报文有误</strong>，服务器无法处理，也就是错误码的含义。</p><ul><li><p>400 Bad Request表示客户端请求的报文有错误。</p></li><li><p>401 Unauthorized：缺失或错误的认证，这个状态代码必须和WWW-Authenticate报头域一起使用。</p></li><li><p>403 Forbidden表示服务器禁止访问资源，并不是客户端的请求出错。</p></li><li><p>404 Not Found表示请求的资源在服务器上不存在或未找到，所以无法提供给客户端。</p></li></ul><p>5XX：状态码表示客户端请求报文正确，但是<strong>服务器处理时内部发生了错误</strong>，属于服务器端的错误码。</p><ul><li><p>501 Not Implemented 表示客户端请求的功能还不支持。</p></li><li><p>502 Bad Gateway 通常是服务器作为网关或代理时返回的错误码，表示服务器自身工作正常，访问后端服务器发生了错误。</p></li><li><p>503 Service Unavailable 表示服务器当前很忙，暂时无法响应服务器。</p></li><li><p>504 Gateway Timeout：网关超时，由作为代理或网关的服务器使用，表示不能及时地从远程服务器获得应答。</p></li></ul><p><strong>301和302的区别</strong></p><p>301重定向，指页面永久性转移，表示为资源或页面永久性地转移到了另一个位置。</p><p>301是HTTP协议中的一种状态码，当用户或搜索引擎向服务器发出浏览请求时，服务器返回的HTTP数据流中头信息中包含状态码 301 ，表示该资源已经永久改变了位置。</p><p>302重定向是页面暂时性转移，搜索引擎会抓取新的内容而保存旧的网址并认为新的网址只是暂时的。</p><h3 id="http1-1" tabindex="-1"><a class="header-anchor" href="#http1-1" aria-hidden="true">#</a> HTTP1.1</h3><p><strong>长连接</strong></p><p>HTTP 1.1支持长连接</p><p>HTTP 1.0规定浏览器与服务器只保持短暂的连接，浏览器的每次请求都需要与服务器建立一个TCP连接，服务器完成请求处理后立即断开TCP连接，服务器不跟踪每个客户也不记录过去的请求。</p><p>HTTP 1.1则支持持久连接Persistent Connection，并且默认使用，在同一个TCP的连接中可以传送多个HTTP请求和响应，多个请求和响应可以重叠，多个请求和响应可以同时进行，更加多的请求头和响应头</p><p>HTTP 1.1的持续连接，也需要增加新的请求头来帮助实现，例如，Connection请求头的值为Keep-Alive时，客户端通知服务器返回本次请求结果后保持连接；Connection请求头的值为Close时，客户端通知服务器返回本次请求结果后关闭连接。</p><p><strong>管道网络传输</strong></p><p>HTTP/1.1 采用了长连接的方式，这使得管道网络传输成为了可能。</p><p>即可在同一个 TCP 连接里面，客户端可以发起多个请求，只要第一个请求发出去了，不必等其回来，就可以发第二个请求出去，可以<strong>减少整体的响应时间。</strong></p><p>举例来说，客户端需要请求两个资源。以前的做法是，在同一个TCP连接里面，先发送 A 请求，然后等待服务器做出回应，收到后再发出 B 请求，管道机制则是允许浏览器同时发出 A 请求和 B 请求。</p><p>但是服务器还是按照<strong>顺序</strong>，先回应 A 请求，完成后再回应 B 请求，要是 前面的回应特别慢，后面就会有许多请求排队等着。</p><p><strong>Host字段</strong></p><p>在HTTP1.0中认为每台服务器都绑定一个唯一的IP地址，因此，请求消息中的URL并没有传递主机名，但随着虚拟主机技术的发展，在一台物理服务器上可以存在多个虚拟主机，并且它们共享一个IP地址。</p><p>HTTP1.1的请求消息和响应消息都应支持Host头域，且请求消息中如果没有Host头域会报告一个错误（400 Bad Request）。</p><p>此外，服务器应该接受以绝对路径标记的资源请求。</p><p><strong>100Status</strong></p><p>HTTP/1.1加入了一个新的状态码100。</p><p>客户端事先发送一个只带头域的请求，如果服务器因为权限拒绝了请求，就回送响应码401（Unauthorized）；</p><p>如果服务器接收此请求就回送响应码100，客户端就可以继续发送带实体的完整请求了。</p><p>100状态代码的使用，允许客户端在发request消息body之前先用request header试探一下server，看server要不要接收request body，再决定要不要发request body。</p><p><strong>Chunked Transfer Coding</strong></p><p>HTTP/1.1将发送方将消息分割成若干个任意大小的数据块，每个数据块在发送时都会附上块的长度，最后用一个零长度的块作为消息结束的标志。</p><p>这种方法允许发送方只缓冲消息的一个片段，避免缓冲整个消息带来的过载。</p><p><strong>Cache</strong></p><p>HTTP/1.1在1.0的基础上加入了一些Cache的新特性，当缓存对象的Age超过Expire时变为Stable对象，Cache不需要直接抛弃Stable对象，而是与源服务器进行重新激活。</p><h3 id="http2-0" tabindex="-1"><a class="header-anchor" href="#http2-0" aria-hidden="true">#</a> HTTP2.0</h3><p><strong>HTTP2.0和HTTP1.X相比的新特性</strong></p><ul><li><p>新的二进制格式，<code>HTTP1.x</code>的解析是基于文本</p></li><li><p>多路复用，即连接共享，即每一个request都是是用作连接共享机制的，一个request对应一个id，这样一个连接上可以有多个request，每个连接的request可以随机的混杂在一起，接收方可以根据request的 id将request再归属到各自不同的服务端请求里面</p></li><li><p>header压缩，<code>HTTP1.x</code>的header带有大量信息，而且每次都要重复发送，HTTP2.0使用encoder来减少需要传输的header大小，通讯双方各自cache一份header fields表，既避免了重复header的传输，又减小了需要传输的大小</p></li><li><p>服务端推送</p></li></ul><p>HTTP/2 还在一定程度上改善了传统的请求 - 应答工作模式，服务不再是被动地响应，也可以<strong>主动</strong>向客户端发送消息。</p><p>举例来说，在浏览器刚请求 HTML 的时候，就提前把可能会用到的 JS、CSS 文件等静态资源主动发给客户端，<strong>减少延时的等待</strong>，也就是服务器推送。</p><p><strong>数据流</strong></p><p>HTTP/2 的数据包不是按顺序发送的，同一个连接里面连续的数据包，可能属于不同的回应。</p><p>因此，必须要对数据包做标记，指出它属于哪个回应。</p><p>每个请求或回应的所有数据包，称为一个数据流（Stream）。</p><p>每个数据流都标记着一个独一无二的编号，其中规定客户端发出的数据流编号为奇数， 服务器发出的数据流编号为偶数</p><p>客户端还可以<strong>指定数据流的优先级</strong>。优先级高的请求，服务器就先响应该请求。</p><p><strong>HTTP2.0的多路复用和HTTP1.X中的长连接复用有什么区别</strong></p><ul><li>HTTP/1.1的Pipeling为若干个请求排队串行化单线程处理，后面的请求等待前面请求的返回才能获得执行机会，一旦有某请求超时等，后续请求只能被阻塞，毫无办法；</li><li>HTTP2.0多个请求可同时在一个连接上并行执行，某个请求任务耗时严重，不会影响到其它连接的正常执行</li></ul><h3 id="http3-0" tabindex="-1"><a class="header-anchor" href="#http3-0" aria-hidden="true">#</a> HTTP3.0</h3><p><strong>使用UDP协议</strong></p><p>HTTP/2 主要的问题在于：多个 HTTP 请求在复用一个 TCP 连接，下层的 TCP 协议是不知道有多少个 HTTP 请求的。</p><p>所以一旦发生了丢包现象，就会触发 TCP 的重传机制，这样在一个 TCP 连接中的<strong>所有的 HTTP 请求都必须等待这个丢了的包被重传回来</strong>。</p><ul><li>HTTP/1.1 中的管道传输中如果有一个请求阻塞了，那么队列后请求也统统被阻塞住了</li><li>HTTP/2 多请求复用一个TCP连接，一旦发生丢包，就会阻塞住所有的 HTTP 请求。</li></ul><p>这都是基于 TCP 传输层的问题，所以 <strong>HTTP/3 把 HTTP 下层的 TCP 协议改成了 UDP！</strong></p><h3 id="https" tabindex="-1"><a class="header-anchor" href="#https" aria-hidden="true">#</a> HTTPS</h3><p><strong>HTTP与HTTPS的区别</strong></p><p>HTTP 是明文传输协议，HTTPS 协议是由 SSL+HTTP 协议构建的可进行加密传输、身份认证的网络协议，比 HTTP 协议安全</p><ul><li><p>HTTPS比HTTP更加安全，对搜索引擎更友好，利于SEO，谷歌、百度优先索引HTTPS网页</p></li><li><p>HTTPS需要用到SSL证书，而HTTP不用</p></li><li><p>HTTPS标准端口443，HTTP标准端口80</p></li><li><p>HTTPS基于传输层，HTTP基于应用层</p></li><li><p>HTTPS在浏览器显示绿色安全锁，HTTP没有显示</p></li></ul><p><strong>工作原理</strong></p><p>HTTPS 协议会对传输的数据进行加密，而加密过程是使用了非对称加密实现</p><p>HTTPS的整体过程分为证书验证和数据传输阶段，具体的交互过程如下：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-c1db0431-0eee-4c80-bb60-b7508a306864.png" alt=""></p><ul><li>Client发起一个HTTPS的请求</li><li>Server把事先配置好的公钥证书返回给客户端。</li><li>Client验证公钥证书：比如是否在有效期内，证书的用途是不是匹配Client请求的站点，是不是在CRL吊销列表里面，它的上一级证书是否有效，这是一个递归的过程，直到验证到根证书（操作系统内置的Root证书或者Client内置的Root证书），如果验证通过则继续，不通过则显示警告信息。</li><li>Client使用伪随机数生成器生成加密所使用的对称密钥，然后用证书的公钥加密这个对称密钥，发给Server。</li><li>Server使用自己的私钥解密这个消息，得到对称密钥。至此，Client和Server双方都持有了相同的对称密钥。</li><li>Server使用对称密钥加密明文内容A，发送给Client。</li><li>Client使用对称密钥解密响应的密文，得到明文内容A。</li><li>Client再次发起HTTPS的请求，使用对称密钥加密请求的明文内容B，然后Server使用对称密钥解密密文，得到明文内容B。</li></ul><h4 id="数字证书" tabindex="-1"><a class="header-anchor" href="#数字证书" aria-hidden="true">#</a> 数字证书</h4><p>客户端先向服务器端索要公钥，然后用公钥加密信息，服务器收到密文后，用自己的私钥解密。</p><blockquote><p>这就存在些问题，如何保证公钥不被篡改和信任度？</p></blockquote><p>所以这里就需要借助第三方权威机构 CA （数字证书认证机构），将<strong>服务器公钥放在数字证书</strong>（由数字证书认证机构颁发）中，只要证书是可信的，公钥就是可信的。</p><p>通过数字证书的方式保证服务器公钥的身份，解决冒充的风险。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-45917c49-bb08-4f88-84d2-5e8ae53acc7c.png" alt=""></p><h3 id="请求报文" tabindex="-1"><a class="header-anchor" href="#请求报文" aria-hidden="true">#</a> 请求报文</h3><p><strong>请求头</strong></p><p>HTTP 请求报文由3部分组成(请求行+请求头+请求体)</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-3c00598c-43c2-44cd-96c6-ee4d40b97abd.png" alt=""></p><p><strong>常见的HTTP报文头属性</strong></p><ul><li>Accpet <ul><li>告诉服务端，客户端接收什么类型的响应</li></ul></li><li>Referer <ul><li>表示这是请求是从哪个URL进来的,比如想在网上购物，但是不知道选择哪家电商平台，你就去问度娘，说哪家电商的东西便宜啊，然后一堆东西弹出在你面前，第一给就是某宝，当你从这里进入某宝的时候，这个请求报文的Referer就是：<a href="www.baidu.com">www.baidu.com</a></li></ul></li><li>Cache-Control <ul><li>对缓存进行控制，如一个请求希望响应的内容在客户端缓存一年，或不被缓可以通过这个报文头设置</li></ul></li><li>Accept-Encoding <ul><li>这个属性是用来告诉服务器能接受什么编码格式，包括字符编码,压缩形式(一般都是压缩形式) <ul><li>例如:<code>Accept-Encoding:gzip, deflate</code>(这两种都是压缩格式)</li></ul></li></ul></li><li>Host <ul><li>指定要请求的资源所在的主机和端口</li></ul></li><li>User-Agent：告诉服务器，客户端使用的操作系统、浏览器版本和名称</li><li>Connection</li></ul><p>决定当前事务（三次握手和四次挥手）完成后，是否关闭网络连接。</p><ul><li>持久连接，事务完成后不关闭网络连接 ：<code> Connection: keep-alive</code></li></ul><ul><li>非持久连接，事务完成后关闭网络连接： <code>Connection: close</code></li></ul><h3 id="响应报文" tabindex="-1"><a class="header-anchor" href="#响应报文" aria-hidden="true">#</a> 响应报文</h3><p>响应报文与请求报文一样，由三个部分组成(响应行,响应头,响应体)</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-58884113-14dc-4cca-a63e-3320f31a4da5.png" alt=""></p><p><strong>HTTP响应报文属性</strong></p><ul><li>Cache-Control <ul><li>响应输出到客户端后，服务端通过该属性告诉客户端该怎么控制响应内容的缓存</li></ul></li><li>ETag <ul><li>表示你请求资源的版本，如果该资源发生啦变化，那么这个属性也会跟着变</li></ul></li><li>Location <ul><li>在重定向中或者创建新资源时使用</li></ul></li><li>Set-Cookie <ul><li>服务端可以设置客户端的cookie</li></ul></li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><h2 id="tcp" tabindex="-1"><a class="header-anchor" href="#tcp" aria-hidden="true">#</a> TCP</h2><p>TCP是一个传输层协议，提供可靠传输，支持全双工，是一个连接导向的协议。</p><p><strong>双工/单工</strong></p><p>在任何一个时刻，如果数据只能单向发送，就是单工。</p><p>如果在某个时刻数据可以向一个方向传输，也可以向另一个方向反方向传输，而且交替进行，叫作半双工；半双工需要至少 1 条线路。</p><p>如果任何时刻数据都可以双向收发，这就是全双工，全双工需要大于 1 条线路。</p><p>TCP 是一个双工协议，数据任何时候都可以双向传输。</p><p>这就意味着客户端和服务端可以平等地发送、接收信息。</p><p><strong>TCP协议的主要特点</strong></p><ul><li><p>TCP是面向连接的运输层协议；所谓面向连接就是双方传输数据之前，必须先建立一条通道，例如三次握手就是建议通道的一个过程，而四次挥手则是结束销毁通道的一个其中过程。</p></li><li><p>每一条TCP连接只能有两个端点（即两个套接字），只能是点对点的；</p></li><li><p>TCP提供可靠的传输服务。传送的数据无差错、不丢失、不重复、按序到达；</p></li><li><p>TCP提供全双工通信。允许通信双方的应用进程在任何时候都可以发送数据，因为两端都设有发送缓存和接受缓存；</p></li><li><p>面向字节流。虽然应用程序与TCP交互是一次一个大小不等的数据块，但TCP把这些数据看成一连串无结构的字节流，它不保证接收方收到的数据块和发送方发送的数据块具有对应大小关系，例如，发送方应用程序交给发送方的TCP10个数据块，接收方的TCP可能只用收到的4个数据块字节流交付给上层的应用程序</p></li></ul><p><strong>TCP的可靠性原理</strong></p><p>可靠传输有如下两个特点:</p><ol><li>传输信道无差错,保证传输数据正确;</li><li>不管发送方以多快的速度发送数据,接收方总是来得及处理收到的数据;</li></ol><p>首先，采用三次握手来建立TCP连接，四次握手来释放TCP连接，从而保证建立的传输信道是可靠的。</p><p>其次，TCP采用了连续ARQ协议（回退N(Go-back-N)；超时自动重传）来保证数据传输的正确性，使用滑动窗口协议来保证接方能够及时处理所接收到的数据，进行流量控制。</p><p>最后，TCP使用慢开始、拥塞避免、快重传和快恢复来进行拥塞控制，避免网络拥塞。</p><h3 id="报文段" tabindex="-1"><a class="header-anchor" href="#报文段" aria-hidden="true">#</a> 报文段</h3><p>TCP虽面向字节流，但传送的数据单元为报文段</p><p>报文段 = 首部 + 数据2部分</p><p>TCP的全部功能体现在它首部中各字段的作用</p><blockquote><ol><li>首部前20个字符固定、后面有4n个字节是根据需而增加的选项</li><li>故 TCP首部最小长度 = 20字节</li></ol></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-8011660d-24c8-460f-ac3d-b97ad9c99b13.png" alt=""></p><p><strong>端口</strong>：</p><p>源端口号和目地端口各占16位两个字节，也就是端口的范围是<code>2^16=65535</code></p><p>另外1024以下是系统保留的，从1024-65535是用户使用的端口范围</p><p><strong>seq序号</strong>：占4字节，TCP连接中传送的字节流中的每个字节都按顺序编号。</p><p>例如：一段报文的序号字段值是107，携带的数据是100个字段，下一个报文段序号从107+100=207开始。</p><p><strong>ack确认号</strong>：4个字节，是期望收到对方下一个报文段的第一个数据字节的序号。</p><p>例如：B收到A发送的报文，其序号字段是301，数据长度是200字节，表明B正确收到A发送的到序号500为止的数据（301+200-1=500），B期望收到A下一个数据序号是501，B发送给A的确认报文段中把ack确认号置为501。</p><p><strong>数据偏移</strong>：头部有可选字段，长度不固定，指出TCP报文段的数据起始处距离报文段的起始处有多远。</p><p><strong>保留</strong>：保留今后使用的，被标为1。</p><p><strong>控制位</strong>：由8个标志位组成。每个标志位表示一个控制功能。</p><p>其中主要的6个：</p><ul><li><p><strong>URG紧急指针标志</strong>，为1表示紧急指针有效，为0忽略紧急指针。</p></li><li><p><strong>ACK确认序号标志</strong>，为1表示确认号有效，为0表示报文不含确认信息，忽略确认号字段，上面的确认号是否有效就是通过该标识控制的。</p></li><li><p><strong>PSH标志</strong>，为1表示带有push标志的数据，指示接收方在接收到该报文段以后，应尽快将该报文段交给应用程序，而不是在缓冲区排队。</p></li><li><p><strong>RST重置连接标志</strong>，重置因为主机崩溃或其他原因而出现错误的连接，或用于拒绝非法的报文段或非法的连接。</p></li><li><p><strong>SYN同步序号</strong>，同步序号，用于建立连接过程，在连接请求中，SYN=1和ACK=0表示该数据段没有使用捎带的确认域，而连接应答捎带一个确认，即SYN=1和ACK=1。。</p></li><li><p><strong>FIN终止标志</strong>，用于释放连接，为1时表示发送方没有发送了。</p></li></ul><p><strong>窗口</strong>：滑动窗口大小，用来告知发送端接收端缓存大小，以此控制发送端发送数据的速率，从而达到流量控制。</p><p><strong>校验和</strong>：奇偶校验，此校验和是对整个的TCP报文段（包括TCP头部和TCP数据），以16位进行计算所得，由发送端计算和存储，接收端进行验证。</p><p><strong>紧急指针</strong>：只有控制位中的URG为1时才有效，指出本报文段中的紧急数据的字节数。</p><p><strong>选项</strong>：其长度可变，定义其他的可选参数。</p><h3 id="粘包与拆包" tabindex="-1"><a class="header-anchor" href="#粘包与拆包" aria-hidden="true">#</a> 粘包与拆包</h3><p>TCP是面向字节流的协议，把上层应用层的数据看成字节流，所以它发送的不是固定大小的数据包，TCP协议也没有字段说明发送数据包的大小。</p><p>而且TCP不保证接受方应用程序收到的数据块和发送应用程序发送的数据块具有对应的大小关系</p><p>比如发送方应用程序交给发送方<code>TCP</code> 10个数据块，接受方TCP可能只用了4个数据块就完整的把接受到的字节流交给了上层应用程序。</p><p>TCP底层并不了解上层业务数据的具体含义，它会根据TCP缓冲区的实际情况进行包的划分，所以在业务上认为，一个完整的包可能会被TCP拆分成多个包进行发送，也有可能把多个小的包封装成一个大的数据包发送，这就是所谓的TCP粘包和拆包问题</p><p><strong>TCP粘包/拆包解决策略</strong></p><p>由于TCP无法理解上一层的业务数据特点，所以TCP是无法保证发送的数据包不发生粘包和拆包，这个问题只能通过上层的协议栈设计来解决，解决思路有一下几种：</p><ul><li><p>消息定长：每个发送的数据包大小固定，比如100字节，不足100字节的用空格补充，接受方取数据的时候根据这个长度来读取数据</p></li><li><p>消息末尾增加换行符来表示一条完整的消息：接收方读取的时候根据换行符来判断是否是一条完整的消息，如果消息的内容也包含换行符，那么这种方式就不合适了。</p></li><li><p>将消息分为消息头和消息尾两部分，消息头指定数据长度，根据消息长度来读取完整的消息，例如UDP协议是这么设计的，用两个字节来表示消息长度，所以UDP不存在粘包和拆包问题。</p></li></ul><h3 id="三次握手" tabindex="-1"><a class="header-anchor" href="#三次握手" aria-hidden="true">#</a> 三次握手</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-f6a9438e-4eb8-4573-9ef5-30e07b8c31df.png" alt=""></p><p><strong>第一次握手</strong>：</p><p>客户端将TCP报文标志位<code>SYN</code>置为1，随机产生一个序号值<code>seq=J</code>，保存在TCP首部的序列号字段里，指明客户端打算连接的服务器的端口，并将该数据包发送给服务器端，发送完毕后，客户端进入<code>SYN_SENT</code>状态，等待服务器端确认。</p><p><strong>第二次握手</strong>：</p><p>服务器端收到数据包后由标志位<code>SYN=1</code>知道客户端请求建立连接，服务器端将TCP报文标志位SYN和ACK都置为1，<code>ack=J+1</code>，随机产生一个序号值<code>seq=K</code>，并将该数据包发送给客户端以确认连接请求，服务器端进入<code>SYN_RCVD</code>状态。</p><p><strong>第三次握手</strong>：</p><p>客户端收到确认后，检查ack是否为<code>J+1</code>，ACK是否为1，如果正确则将标志位ACK置为1，<code>ack=K+1</code>，并将该数据包发送给服务器端，服务器端检查ack是否为<code>K+1</code>，ACK是否为1，如果正确则连接建立成功，客户端和服务器端进入<code>ESTABLISHED</code>状态，完成三次握手，随后客户端与服务器端之间可以开始传输数据了。</p><p><strong>上面写的ack和ACK，不是同一个概念：</strong></p><ul><li><p>小写的ack代表的是头部的确认号Acknowledge number， 缩写ack，是对上一个包的序号进行确认的号，<code>ack=seq+1</code>。</p></li><li><p>大写的ACK，则是我们上面说的TCP首部的标志位，用于标志的TCP包是否对上一个包进行了确认操作，如果确认了，则把ACK标志位设置成1。</p></li></ul><p><strong>TCP为什么三次握手而不是两次握手</strong></p><ul><li><p>为了实现可靠数据传输， TCP 协议的通信双方， 都必须维护一个序列号， 以标识发送出去的数据包中， 哪些是已经被对方收到的。 三次握手的过程即是通信双方相互告知序列号起始值， 并确认对方已经收到了序列号起始值的必经步骤</p></li><li><p>如果只是两次握手， 至多只有连接发起方的起始序列号能被确认， 另一方选择的序列号则得不到确认</p></li></ul><p><strong>《计算机网络》中是这样说的：</strong></p><p>为了防止已失效的连接请求报文段突然又传送到了服务端，因而产生错误。</p><blockquote><p>在书中同时举了一个例子，如下：</p></blockquote><p>假如<code>client</code>发出的第一个连接请求报文段并没有丢失，而是在某个网络结点长时间的滞留了，以致延误到连接释放以后的某个时间才到达<code>server</code>，本来这是一个早已失效的报文段，但<code>server</code>收到此失效的连接请求报文段后，就误认为是client再次发出的一个新的连接请求。</p><p>于是就向client发出确认报文段，同意建立连接，假设不采用<strong>三次握手</strong>，那么只要server发出确认，新的连接就建立了，由于现在client并没有发出建立连接的请求，因此不会理睬server的确认，也不会向server发送数据。</p><p>但server却以为新的连接已经建立，并一直等待<code>client</code>发来数据，这样，server的很多资源就白白浪费掉了。</p><p>采用<strong>三次握手</strong>的办法可以防止上述现象发生，例如刚才那种情况，client不会向<code>server</code>的确认发出确认，server由于收不到确认，就知道client并没有要求建立连接。</p><p><strong>什么是半连接队列</strong></p><p>服务器第一次收到客户端的 SYN 之后，就会处于 <code>SYN_RCVD</code>状态，此时双方还没有完全建立其连接，服务器会把此种状态下请求连接放在一个队列里，我们把这种队列称之为<strong>半连接队列</strong>。</p><p>当然还有一个<strong>全连接队列</strong>，就是已经完成三次握手，建立起连接的就会放在全连接队列中。如果队列满了就有可能会出现丢包现象。</p><p>补充一点关于<strong>SYN-ACK 重传次数</strong>的问题：</p><p>服务器发送完SYN－ACK包，如果未收到客户确认包，服务器进行首次重传，等待一段时间仍未收到客户确认包，进行第二次重传，如果重传次数超过系统规定的最大重传次数，系统将该连接信息从半连接队列中删除。</p><p><strong>三次握手过程中可以携带数据吗</strong></p><p>其实第三次握手的时候，是可以携带数据的，也就是说，第一次、第二次握手不可以携带数据，而第三次握手是可以携带数据的。</p><p>假如第一次握手可以携带数据的话，如果有人要恶意攻击服务器，那他每次都在第一次握手中的 SYN 报文中放入大量的数据，因为攻击者根本就不理服务器的接收、发送能力是否正常，然后疯狂着重复发 SYN 报文的话，这会让服务器花费很多时间、内存空间来接收这些报文。也就是说，第一次握手可以放数据的话，其中一个简单的原因就是会让服务器更加容易受到攻击了。</p><p>而对于第三次的话，此时客户端已经处于 established 状态，也就是说，对于客户端来说，他已经建立起连接了，并且也已经知道服务器的接收、发送能力是正常的了，所以能携带数据没啥毛病。</p><h3 id="四次挥手" tabindex="-1"><a class="header-anchor" href="#四次挥手" aria-hidden="true">#</a> 四次挥手</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-4a5e455f-5cf8-47a6-8fe4-a4c83a445f77.png" alt=""></p><p>挥手请求可以是Client端，也可以是Server端发起的，我们假设是Client端发起：</p><ul><li><p>第一次挥手： Client端发起挥手请求，向Server端发送标志位是FIN报文段，设置序列号seq，此时，Client端进入<code>FIN_WAIT_1</code>状态，这表示Client端没有数据要发送给Server端了。</p></li><li><p>第二次挥手：Server端收到了Client端发送的FIN报文段，向Client端返回一个标志位是ACK的报文段，ack设为seq加1，Client端进入<code>FIN_WAIT_2</code>状态，Server端告诉Client端，我确认并同意你的关闭请求。</p></li><li><p>第三次挥手： Server端向Client端发送标志位是FIN的报文段，请求关闭连接，同时Client端进入<code>LAST_ACK</code>状态。</p></li><li><p>第四次挥手 ： Client端收到Server端发送的FIN报文段，向Server端发送标志位是ACK的报文段，然后Client端进入<code>TIME_WAIT</code>状态，Server端收到Client端的ACK报文段以后，就关闭连接，此时，Client端等待2MSL的时间后依然没有收到回复，则证明Server端已正常关闭，那好，Client端也可以关闭连接了。</p></li></ul><p><strong>为什么连接的时候是三次握手，关闭的时候却是四次握手？</strong></p><p>建立连接时因为当Server端收到Client端的SYN连接请求报文后，可以直接发送SYN+ACK报文。其中ACK报文是用来应答的，SYN报文是用来同步的。所以建立连接只需要三次握手。</p><p>由于TCP协议是一种面向连接的、可靠的、基于字节流的运输层通信协议，TCP是全双工模式。</p><p>这就意味着，关闭连接时，当Client端发出FIN报文段时，只是表示Client端告诉Server端数据已经发送完毕了。当Server端收到FIN报文并返回ACK报文段，表示它已经知道Client端没有数据发送了，但是Server端还是可以发送数据到Client端的，所以Server很可能并不会立即关闭SOCKET，直到Server端把数据也发送完毕。</p><p>当Server端也发送了FIN报文段时，这个时候就表示Server端也没有数据要发送了，就会告诉Client端，我也没有数据要发送了，之后彼此就会愉快的中断这次TCP连接。</p><p><strong>为什么TIME_WAIT要等待2MSL？</strong></p><p>MSL：报文段最大生存时间，它是任何报文段被丢弃前在网络内的最长时间。</p><p>有以下两个原因：</p><ul><li>第一点：保证TCP协议的全双工连接能够可靠关闭： 由于IP协议的不可靠性或者是其它网络原因，导致了Server端没有收到Client端的ACK报文，那么Server端就会在超时之后重新发送FIN，如果此时Client端的连接已经关闭处于<code>CLOESD</code>状态，那么重发的FIN就找不到对应的连接了，从而导致连接错乱，所以，Client端发送完最后的ACK不能直接进入<code>CLOSED</code>状态，而要保持<code>TIME_WAIT</code>，当再次收到FIN的时候，能够保证对方收到ACK，最后正确关闭连接。</li><li>第二点：保证这次连接的重复数据段从网络中消失 如果Client端发送最后的ACK直接进入<code>CLOSED</code>状态，然后又再向Server端发起一个新连接，这时不能保证新连接的与刚关闭的连接的端口号是不同的，也就是新连接和老连接的端口号可能一样了，那么就可能出现问题：如果前一次的连接某些数据滞留在网络中，这些延迟数据在建立新连接后到达Client端，由于新老连接的端口号和IP都一样，TCP协议就认为延迟数据是属于新连接的，新连接就会接收到脏数据，这样就会导致数据包混乱，所以TCP连接需要在<code>TIME_WAIT</code>状态等待2倍MSL，才能保证本次连接的所有数据在网络中消失。</li></ul><h3 id="流量控制" tabindex="-1"><a class="header-anchor" href="#流量控制" aria-hidden="true">#</a> 流量控制</h3><p><strong>RTT和RTO</strong></p><p>RTT：发送一个数据包到收到对应的ACK，所花费的时间</p><p>RTO：重传时间间隔（TCP在发送一个数据包后会启动一个重传定时器，RTO即定时器的重传时间）</p><p>开始预先算一个定时器时间，如果回复ACK，重传定时器就自动失效，即不需要重传；如果没有回复ACK，RTO定时器时间就到了，重传。</p><p>RTO是本次发送当前数据包所预估的超时时间，RTO不是固定写死的配置，是经过RTT计算出来的。</p><p><strong>滑动窗口</strong></p><p>TCP的滑动窗口主要有两个作用：</p><ol><li><p>保证TCP的可靠性</p></li><li><p>保证TCP的流控特性</p></li></ol><p>TCP报文头有个字段叫Window，用于接收方通知发送方自己还有多少缓存区可以接收数据，发送方根据接收方的处理能力来发送数据，不会导致接收方处理不过来，这便是流量控制。</p><p>发送方都维持了一个连续的允许发送的帧的序号，称为发送窗口；同时，接收方也维持了一个连续的允许接收的帧的序号，称为接收窗口。</p><p>发送窗口和接收窗口的序号的上下界不一定要一样，甚至大小也可以不同。</p><p>不同的滑动窗口协议窗口大小一般不同。</p><p>发送方窗口内的序列号代表了那些已经被发送，但是还没有被确认的帧，或者是那些可以被发送的帧</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-d734c97b-d7d6-4af6-8674-524a81fb4dbe.png" alt=""></p><p>滑动窗口由四部分组成每个字节的数据都有唯一顺序的编码，随着时间发展，未确认部分与可以发送数据包编码部分向右移动，形式滑动窗口</p><ol><li><code>绿色</code>：发送成功并已经ACK确认的数据</li><li><code>黄色</code>：发送成功等待ACK确认的数据(占用滑动窗口大小)</li><li><code>紫色</code>：滑动窗口剩余大小可以发送的字节数量(滑动窗口可用大小)</li><li><code>灰色</code>：后续数据编码</li></ol><p>接收窗口的大小就是滑动窗口的最大值，数据传输过程中滑动窗口的可用大小是动态变化的。</p><p>但是还有这么一点，滑动窗口的设计仅仅是考虑到了处理方的处理能力，但是没有考虑到道路的通畅问题</p><p>就好像服务端可以处理100M数据，但是传输的数据99M都堵在路上了，这不就是导致道路阻塞了么？这就需要另外一个设计<strong>拥塞避免</strong></p><p><strong>流量控制的目的</strong></p><p>如果发送者发送数据过快，接收者来不及接收，那么就会有分组丢失。</p><p>为了避免分组丢失，控制发送者的发送速度，使得接收者来得及接收，这就是流量控制。</p><p>流量控制根本目的是防止分组丢失，它是构成TCP可靠性的一方面。</p><p><strong>如何实现流量控制</strong></p><p>由滑动窗口协议（连续ARQ协议）实现。滑动窗口协议既保证了分组无差错、有序接收，也实现了流量控制。</p><p>主要的方式就是接收方返回的 ACK 中会包含自己的接收窗口的大小，并且利用大小来控制发送方的数据发送。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-4bdc0051-8878-4ffc-b9db-71b73ec49cd0.png" alt=""></p><p><strong>流量控制引发的死锁</strong></p><p>当发送者收到了一个窗口为0的应答，发送者便停止发送，等待接收者的下一个应答。</p><p>但是如果这个窗口不为0的应答在传输过程丢失，发送者一直等待下去，而接收者以为发送者已经收到该应答，等待接收新数据，这样双方就相互等待，从而产生死锁。</p><p>为了避免流量控制引发的死锁，TCP使用了<strong>持续计时器</strong>。每当发送者收到一个零窗口的应答后就启动该计时器。时间一到便主动发送报文询问接收者的窗口大小。若接收者仍然返回零窗口，则重置该计时器继续等待；若窗口不为0，则表示应答报文丢失了，此时重置发送窗口后开始发送，这样就避免了死锁的产生。</p><h3 id="拥塞控制" tabindex="-1"><a class="header-anchor" href="#拥塞控制" aria-hidden="true">#</a> 拥塞控制</h3><p><strong>为什么要进行拥塞控制</strong></p><p>假设网络已经出现拥塞，如果不处理拥塞，那么延时增加，出现更多丢包，触发发送方重传数据，加剧拥塞情况，继续恶性循环直至网络瘫痪。</p><p>拥塞控制与流量控制的适应场景和目的均不同。</p><p>拥塞发生前，可避免流量过快增长拖垮网络；拥塞发生时，唯一的选择就是降低流量。</p><p>主要使用4种算法完成拥塞控制：</p><ol><li>慢启动</li><li>拥塞避免</li><li>快重传算法</li><li>快速恢复算法</li></ol><p>算法1、2适用于拥塞发生前，算法3适用于拥塞发生时，算法4适用于拥塞解决后（相当于拥塞发生前）。</p><p><strong>rwnd与cwnd</strong></p><p><code>rwnd</code>（Receiver Window，接收者窗口）与<code>cwnd</code>（Congestion Window，拥塞窗口）：</p><ul><li><p>rwnd是用于流量控制的窗口大小，主要取决于接收方的处理速度，由接收方通知发送方被动调整。</p></li><li><p>cwnd是用于拥塞处理的窗口大小，取决于网络状况，由发送方探查网络主动调整。</p></li></ul><p>同时考虑流量控制与拥塞处理，则发送方窗口的大小不超过<code>min{rwnd, cwnd}</code>。</p><p><strong>慢启动算法</strong></p><p>慢开始算法的思路就是，不要一开始就发送大量的数据，先探测一下网络的拥塞程度，也就是说由小到大逐渐增加拥塞窗口的大小。</p><p>这里用报文段的个数作为拥塞窗口的大小举例说明慢开始算法，实际的拥塞窗口大小是以字节为单位的。</p><p>一个传输轮次所经历的时间其实就是往返时间RTT，而且每经过一个传输轮次，拥塞窗口cwnd就加倍。</p><p>为了防止cwnd增长过大引起网络拥塞，还需设置一个慢开始门限ssthresh状态变量。</p><blockquote><p>ssthresh的用法如下：</p></blockquote><ul><li><p>cwnd&lt;ssthresh时，使用慢开始算法。</p></li><li><p>当cwnd&gt;ssthresh时，改用拥塞避免算法。</p></li><li><p>当cwnd=ssthresh时，慢开始与拥塞避免算法任意</p></li></ul><p>注意，这里的慢并不是指cwnd的增长速率慢，而是指在TCP开始发送报文段时先设置cwnd=1，然后逐渐增大，这当然比按照大的cwnd一下子把许多报文段突然注入到网络中要慢得多。</p><p><strong>拥塞避免算法</strong></p><p>让拥塞窗口cwnd缓慢地增大，即每经过一个往返时间RTT就把发送方的拥塞窗口cwnd加1，而不是加倍。</p><p>这样拥塞窗口cwnd按线性规律缓慢增长，比慢开始算法的拥塞窗口增长速率缓慢得多</p><p>无论是在慢开始阶段还是在拥塞避免阶段，只要发送方判断网络出现拥塞（其根据就是没有按时收到确认，虽然没有收到确认可能是其他原因的分组丢失，但是因为无法判定，所以都当做拥塞来处理），就把慢开始门限ssthresh设置为出现拥塞时的发送窗口大小的一半（但不能小于2）。</p><p>然后把拥塞窗口cwnd重新设置为1，执行慢开始算法。</p><p>这样做的目的就是要迅速减少主机发送到网络中的分组数，使得发生拥塞的路由器有足够时间把队列中积压的分组处理完毕。</p><p><strong>整个拥塞控制的流程：</strong></p><p>假定cwnd=24时，网络出现超时（拥塞），则更新后的ssthresh=12，cwnd重新设置为1，并执行慢开始算法。</p><p>当cwnd=12=ssthresh时，改为执行拥塞避免算法</p><p>注意：拥塞避免并非完全能够避免了阻塞，而是使网络比较不容易出现拥塞。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-314eba07-1388-4e8b-9307-8dd8d03b0dfe.png" alt=""></p><p><strong>快重传算法</strong></p><p>快重传要求接收方在收到一个失序的报文段后就立即发出重复确认（为的是使发送方及早知道有报文段没有到达对方，可提高网络吞吐量约20%）而不要等到自己发送数据时捎带确认。</p><p>快重传算法规定，发送方只要一连收到三个重复确认就应当立即重传对方尚未收到的报文段，而不必继续等待设置的重传计时器时间到期</p><p><strong>快恢复算法</strong></p><p>快重传配合使用的还有快恢复算法，有以下两个要点：</p><ul><li><p>当发送方连续收到三个重复确认时，就把ssthresh门限减半（为了预防网络发生拥塞）。</p></li><li><p>但是接下去并不执行慢开始算法</p></li></ul><p>考虑到如果网络出现拥塞的话就不会收到好几个重复的确认，所以发送方现在认为网络可能没有出现拥塞。</p><p>所以此时不执行慢开始算法，而是将cwnd设置为ssthresh减半后的值，然后执行拥塞避免算法，使cwnd缓慢增大。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-3a424e43-405f-494d-b700-093781b63035.png" alt=""></p><h3 id="socket" tabindex="-1"><a class="header-anchor" href="#socket" aria-hidden="true">#</a> Socket</h3><p>即套接字，是应用层 与 <code>TCP/IP</code> 协议族通信的中间软件抽象层，表现为一个封装了 TCP / IP协议族 的编程接口（API）</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-eff20ef6-9d35-4075-8c53-ab52c7a46ac7.png" alt=""></p><p><code>Socket</code>不是一种协议，而是一个编程调用接口（<code>API</code>），属于传输层（主要解决数据如何在网络中传输）</p><p>对用户来说，只需调用Socket去组织数据，以符合指定的协议，即可通信</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><h2 id="udp" tabindex="-1"><a class="header-anchor" href="#udp" aria-hidden="true">#</a> UDP</h2><p><strong>UDP协议特点</strong></p><ul><li><p>UDP是无连接的传输层协议；</p></li><li><p>UDP使用尽最大努力交付，不保证可靠交付；</p></li><li><p>UDP是面向报文的，对应用层交下来的报文，不合并，不拆分，保留原报文的边界；</p></li><li><p>UDP没有拥塞控制，因此即使网络出现拥塞也不会降低发送速率；</p></li><li><p>UDP支持一对一　一对多　多对多的交互通信；</p></li><li><p>UDP的首部开销小，只有８字节</p></li></ul><p><strong>TCP和UDP的区别</strong></p><ul><li><p>TCP是可靠传输，UDP是不可靠传输;</p></li><li><p>TCP面向连接，UDP无连接;</p></li><li><p>TCP传输数据有序，UDP不保证数据的有序性;</p></li><li><p>TCP不保存数据边界，UDP保留数据边界;</p></li><li><p>TCP传输速度相对UDP较慢;</p></li><li><p>TCP有流量控制和拥塞控制，UDP没有;</p></li><li><p>TCP是重量级协议，UDP是轻量级协议;</p></li><li><p>TCP首部较长20字节，UDP首部较短８字节;</p></li></ul><p><strong>基于TCP和UDP的常用协议</strong></p><p>HTTP、HTTPS、FTP、TELNET、SMTP(简单邮件传输协议)协议基于可靠的TCP协议。</p><p>TFTP、DNS、DHCP、TFTP、SNMP(简单网络管理协议)、RIP基于不可靠的UDP协议</p><h3 id="报文段-1" tabindex="-1"><a class="header-anchor" href="#报文段-1" aria-hidden="true">#</a> 报文段</h3><p>UDP的报文段共有2个字段：数据字段 + 首部字段</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-a5d0d209-01db-4ee7-b63b-bf2659545702.png" alt=""></p><p><strong>UDP报文中每个字段的含义如下：</strong></p><ul><li>源端口：这个字段占据 UDP 报文头的前 16 位，通常包含发送数据报的应用程序所使用的 UDP 端口，接收端的应用程序利用这个字段的值作为发送响应的目的地址，这个字段是可选的，所以发送端的应用程序不一定会把自己的端口号写入该字段中，如果不写入端口号，则把这个字段设置为 0，这样，接收端的应用程序就不能发送响应了。</li><li>目的端口：接收端计算机上 UDP 软件使用的端口，占据 16 位。</li><li>长度：该字段占据 16 位，表示 UDP 数据报长度，包含 UDP 报文头和 UDP 数据长度，因为 UDP 报文头长度是 8 个字节，所以这个值最小为 8。</li><li>校验值：该字段占据 16 位，可以检验数据在传输过程中是否被损坏。</li></ul><h2 id="网络层" tabindex="-1"><a class="header-anchor" href="#网络层" aria-hidden="true">#</a> 网络层</h2><h3 id="mac地址" tabindex="-1"><a class="header-anchor" href="#mac地址" aria-hidden="true">#</a> MAC地址</h3><p>MAC称为物理地址，也叫硬件地址，用来定义网络设备的位置，MAC地址是网卡出厂时设定的，是固定的（但可以通过在设备管理器中或注册表等方式修改，同一网段内的MAC地址必须唯一）。</p><p>MAC地址采用十六进制数表示，长度是6个字节（48位），分为前24位和后24位。</p><blockquote><p>MAC地址对应于OSI参考模型的第二层数据链路层，工作在数据链路层的交换机维护着计算机MAC地址和自身端口的数据库，交换机根据收到的数据帧中的目的MAC地址字段来转发数据帧。</p></blockquote><h3 id="ip地址" tabindex="-1"><a class="header-anchor" href="#ip地址" aria-hidden="true">#</a> IP地址</h3><p>常见的IP地址分为IPv4与IPv6两大类，当前广泛应用的是IPv4，目前IPv4几乎耗尽，下一阶段必然会进行版本升级到IPv6；</p><p>IP地址是以网络号和主机号来标示网络上的主机的，我们把网络号相同的主机称之为本地网络，网络号不相同的主机称之为远程网络主机</p><p>本地网络中的主机可以直接相互通信；远程网络中的主机要相互通信必须通过本地网关（Gateway）来传递转发数据。</p><p>IP地址对应于OSI参考模型的第三层网络层，工作在网络层的路由器根据目标IP和源IP来判断是否属于同一网段，如果是不同网段，则转发数据包。</p><p><strong>IP地址格式和表示</strong></p><p>IP地址(IPv4)由32位二进制数组成，分为4段（4个字节），每一段为8位二进制数（1个字节）</p><p>每一段8位二进制，中间使用英文的标点符号<code>.</code>隔开</p><p>由于二进制数太长，为了便于记忆和识别，把每一段8位二进制数转成十进制，大小为0至255。</p><p>IP地址的这种表示法叫做<strong>点分十进制表示法</strong>。</p><p>IP地址表示为：<code>xxx.xxx.xxx.xxx</code></p><p>举个栗子：<code>210.21.196.6</code>就是一个IP地址的表示。</p><p>计算机的IP地址由两部分组成，一部分为网络标识，一部分为主机标识，同一网段内的计算机网络部分相同，主机部分不能同时重复出现。</p><p><strong>路由器</strong>连接不同网段，负责不同网段之间的数据转发，<strong>交换机</strong>连接的是同一网段的计算机。</p><p>通过设置网络地址和主机地址，在互相连接的整个网络中保证每台主机的IP地址不会互相重叠，即IP地址具有了唯一性。</p><p><strong>IP地址分类详解</strong></p><p>IP地址分A、B、C、D、E五类，其中A、B、C这三类是比较常用的IP地址，D、E类为特殊地址。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-212f3f9b-b07f-4cc9-81eb-55bb478f1b66.png" alt=""></p><h3 id="子网掩码" tabindex="-1"><a class="header-anchor" href="#子网掩码" aria-hidden="true">#</a> 子网掩码</h3><p><strong>子网掩码的概念及作用</strong></p><p>通过子网掩码，才能表明一台主机所在的子网与其他子网的关系，使网络正常工作。</p><p>子网掩码和IP地址做与运算，分离出IP地址中的网络地址和主机地址，用于判断该IP地址是在本地网络上，还是在远程网络网上。</p><p>子网掩码还用于将网络进一步划分为若干子网，以避免主机过多而拥堵或过少而IP浪费。</p><p><strong>子网掩码的组成</strong></p><p>同IP地址一样，子网掩码是由长度为32位二进制数组成的一个地址。</p><p>子网掩码32位与IP地址32位相对应，IP地址如果某位是网络地址，则子网掩码为1，否则为0。</p><p>举个栗子：如：<code>11111111.11111111.11111111.00000000</code></p><blockquote><p>左边连续的1的个数代表网络号的长度，（使用时必须是连续的，理论上也可以不连续），右边连续的0的个数代表主机号的长度。</p></blockquote><p><strong>为什么要使用子网掩码</strong></p><p>两台主机要通信，首先要判断是否处于同一网段，即网络地址是否相同。</p><p>如果相同，那么可以把数据包直接发送到目标主机，否则就需要路由网关将数据包转发送到目的地。</p><blockquote><p>可以这么简单的理解：A主机要与B主机通信，A和B各自的IP地址与A主机的子网掩码进行And与运算，看得出的结果：</p><p>1、结果如果相同，则说明这两台主机是处于同一个网段，这样A可以通过ARP广播发现B的MAC地址，B也可以发现A的MAC地址来实现正常通信。</p><p>2、如果结果不同，ARP广播会在本地网关终结，这时候A会把发给B的数据包先发给本地网关，网关再根据B主机的IP地址来查询路由表，再将数据包继续传递转发，最终送达到目的地B。</p></blockquote><hr><blockquote><p>计算机的网关（Gateway）就是到其他网段的出口，也就是路由器接口IP地址。</p><p>路由器接口使用的IP地址可以是本网段中任何一个地址，不过通常使用该网段的第一个可用的地址或最后一个可用的地址，这是为了尽可能避免和本网段中的主机地址冲突。</p></blockquote><p>在如下拓扑图示例中，A与B，C与D，都可以直接相互通信（都是属于各自同一网段，不用经过路由器）</p><p>但是A与C，A与D，B与C，B与D它们之间不属于同一网段，所以它们通信是要经过本地网关，然后路由器根据对方IP地址，在路由表中查找恰好有匹配到对方IP地址的直连路由，于是从另一边网关接口转发出去实现互连</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-e1d68baa-9d8c-4595-bcb5-0dc5f6e240fe.png" alt=""></p><p><strong>子网掩码和IP地址的关系</strong></p><p>子网掩码是用来判断任意两台主机的IP地址是否属于同一网络的依据</p><p>拿双方主机的IP地址和自己主机的子网掩码做与运算，如结果为同一网络，就可以直接通信</p><p><strong>如何根据IP地址和子网掩码，计算网络地址：</strong></p><p>将IP地址与子网掩码转换成二进制数。</p><p>将二进制形式的 IP 地址与子网掩码做与运算。</p><p>将得出的结果转化为十进制，便得到网络地址。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-5fab32f0-20d1-4c05-bfb9-47928ceac65d.png" alt=""></p><h3 id="网关" tabindex="-1"><a class="header-anchor" href="#网关" aria-hidden="true">#</a> 网关</h3><p>网关实质上是一个网络通向其他网络的IP地址。</p><p>比如有网络A和网络B，网络A的IP地址范围为<code>192.168.1.1~192. 168.1.254</code>，子网掩码为<code>255.255.255.0</code>；</p><p>网络B的IP地址范围为<code>192.168.2.1~192.168.2.254</code>，子网掩码为<code>255.255.255.0</code>。</p><p>在没有路由器的情况下，两个网络之间是不能进行TCP/IP通信的，即使是两个网络连接在同一台交换机(或集线器)上，TCP/IP协议也会根据子网掩码(<code>255.255.255.0</code>)判定两个网络中的主机处在不同的网络里。</p><p>而要实现这两个网络之间的通信，则必须通过网关。</p><p>如果网络A中的主机发现数据包的目的主机不在本地网络中，就把数据包转发给它自己的网关，再由网关转发给网络B的网关，网络B的网关再转发给网络B的某个主机。网络B向网络A转发数据包的过程。</p><p><strong>所以说，只有设置好网关的IP地址，TCP/IP协议才能实现不同网络之间的相互通信。</strong></p><blockquote><p>那么这个IP地址是哪台机器的IP地址呢？</p></blockquote><p>网关的IP地址是具有路由功能的设备的IP地址，具有路由功能的设备有路由器、启用了路由协议的服务器(实质上相当于一台路由器)、代理服务器(也相当于一台路由器)。</p><h3 id="ping" tabindex="-1"><a class="header-anchor" href="#ping" aria-hidden="true">#</a> Ping</h3><p>Ping是我们测试网络连接的常用指令。</p><p>它利用ICMP报文检测网络连接。</p><p><strong>假设A ping B</strong></p><ol><li><p>ping通知系统建立一个固定格式的ICMP请求数据包。</p></li><li><p>ICMP协议打包这个数据包和B的IP地址转交给IP协议层</p></li><li><p>IP层协议将机器B的IP地址为目的地址，本机的IP地址为源地址，加上一些头部必要的控制信息，构建一个IP数据包</p></li><li><p>获取B的MAC地址，做这个操作首先机器A会判断B是否在同一网段内，若IP层协议通过B的IP地址和自己的子网掩码，发现它跟自己属于同一网络，就直接在本网络查找这台机器的MAC，否则则通过路由器进行类似查找。</p></li></ol><blockquote><p>接下来是ARP协议根据IP地址查找MAC地址的过程:</p></blockquote><ul><li><p>若两台机器之前有过通信，在机器A的ARP缓存表里应该存有B的IP与其MAC地址的映射关系。</p></li><li><p>若没有，则通过发送ARP请求广播，得到回应的B机器MAC地址，并交给数据链路层</p></li></ul><ol start="5"><li><p>数据链路层构建一个数据帧，目的地址是IP层传过来的MAC地址，源地址是本机的MAC地址，再附加一些必要的控制信息，依据以太网的介质访问规则将他们传送出去</p></li><li><p>机器B收到这个数据帧后，先检查目的地址，和本机MAC地址对比：</p></li></ol><p>符合，接受，接收后检查该数据帧，将IP数据包从帧中提取出来，交给本机的的IP地址协议层协议，IP协议层检查之后，将有用的信息提取给ICMP协议，后者处理，马上构建一个ICMP应答包，发送给A，其过程和主机A发送ICMP请求包到B的过程类似，但不用ARP广播收取A的信息，因为请求包中已经有足够的信息用于B回应A。</p><p>若不符合，丢弃。</p><p>可以知道PING的过程即一段发送报文和接受确认报文的过程，在来回直接可以计算时延。</p><h3 id="dns" tabindex="-1"><a class="header-anchor" href="#dns" aria-hidden="true">#</a> DNS</h3><p>DNS通过主机名，最终得到该主机名对应的IP地址的过程叫做域名解析（或主机名解析）。</p><p><strong>通俗的讲</strong>，我们更习惯于记住一个网站的名字，www.baidu.com，而不是记住它的ip地址，比如：167.23.10.2</p><p><strong>工作原理</strong></p><p>将主机域名转换为ip地址，属于应用层协议，使用UDP传输。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-7d129644-dfa7-4151-ae2f-9f3f084c6be9.png" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/cs/wangluo-4ed70ed6-ceeb-4761-8fd4-eb2fe092273d.png" alt=""></p><p>第一步，客户端向本地DNS服务器发送解析请求</p><p>第二步，本地DNS如有相应记录会直接返回结果给客户端，如没有就向DNS根服务器发送请求</p><p>第三步,DSN根服务器接收到请求，返回给本地服务器一个所查询域的主域名服务器的地址</p><p>第四步，本地dns服务器再向返回的主域名服务器地址发送查询请求</p><p>第五步，主域名服务器如有记录就返回结果，没有的话返回相关的下级域名服务器地址</p><p>第六步，本地DNS服务器继续向接收到的地址进行查询请求</p><p>第七步，下级域名服务器有相应记录，返回结果</p><p>第八步，本地dns服务器将收到的返回地址发给客户端，同时写入自己的缓存，以便下次查询</p><p>DNS域名查询实际上就是个不断递归查询的过程，直到查找到相应结果，需要注意的时，当找不到相应记录，会返回空结果，而不是超时信息</p><h4 id="dns记录" tabindex="-1"><a class="header-anchor" href="#dns记录" aria-hidden="true">#</a> DNS记录</h4><blockquote><p>A记录</p></blockquote><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>定义www.example.com的ip地址
 www.example.com.     IN     A     139.18.28.5;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><p>上面的就是一条 DNS 记录，纯文本即可。</p><p><code>www.example.com</code> 是要解析的域名。</p><p>A 是记录的类型，A 记录代表着这是一条用于解析 IPv4 地址的记录。</p><p>从这条记录可知，<code>www.example.com</code>的 IP 地址是 139.18.28.5。</p><blockquote><p>CNAME</p></blockquote><p>CNAME用于定义域名的别名，如下面这条 DNS 记录：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>定义www.example.com的别名
 a.example.com.          IN     CNAME   b.example.com.
@@ -58,6 +58,6 @@ a.com.     IN      NS      ns2.a.com.
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>接收者接收消息显示的时候将会弹出警告窗口！</p><blockquote><p>持久性XSS攻击 (留言板场景)</p></blockquote><p>一般指XSS攻击代码存储在网站数据库，当一个页面被用户打开的时候执行。</p><p>也就是说，每当用户使用浏览器打开指定页面时，脚本便执行。</p><p>与非持久性XSS攻击相比，持久性XSS攻击危害性更大。</p><p>从名字就可以了解到，持久性XSS攻击就是将攻击代码存入数据库中，然后客户端打开时就执行这些攻击代码。</p><p>例如，留言板表单中的表单域：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;input type=&quot;text&quot; name=&quot;content&quot; value=&quot;这里是用户填写的数据&quot;&gt;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>正常操作流程是：用户是提交相应留言信息 — 将数据存储到数据库 — 其他用户访问留言板，应用去数据并显示；</p><p>而非正常操作流程是攻击者在value填写:</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;script&gt;alert(‘foolish!’)；&lt;/script&gt; &lt;!--或者html其他标签（破坏样式。。。）、一段攻击型代码--&gt;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>并将数据提交、存储到数据库中；当其他用户取出数据显示的时候，将会执行这些攻击性代码</p><p><strong>CSRF：</strong></p><p>跨站请求伪造，是一种挟制用户在当前已登录的Web应用程序上执行非本意的操作的攻击方法。</p><p>比如冒充用户发起请求（在用户不知情的情况下），完成一些违背用户意愿的请求（如恶意发帖，删帖，改密码，发邮件等）。</p><h3 id="dos攻击" tabindex="-1"><a class="header-anchor" href="#dos攻击" aria-hidden="true">#</a> DOS攻击</h3><p>DOS：中文名称是拒绝服务，该攻击的效果是使得计算机或网络无法提供正常的服务</p><p><strong>DOS攻击的原理：</strong></p><p>首先攻击者向被攻击的服务器发送大量的虚假IP请求，被攻击者在收到请求后返回确认信息，等待攻击者进行确认，该过程需要TCP的三次握手，由于攻击者发送的请求信息是虚假的，所以服务器接收不到返回的确认信息，在一段时间内服务器会处与等待状态，而分配给这次请求的资源却被有被释放</p><p>当被攻击者等待一定的时间后，会因连接超时而断开，这时攻击者在次发送新的虚假信息请求，这样最终服务器资源被耗尽，直到瘫痪</p><p><strong>DDOS：中文名称是分布式拒绝服务攻击</strong></p><p>指的是攻击者控制多台主机同时向同一主机或网络发起<code>DOS</code>攻击</p><p>DRDoS分布反射式拒绝服务攻击这是<code>DDoS</code>攻击的变形</p><p><strong>DDOS究竟如何攻击</strong></p><p>目前最流行也是最好用的攻击方法就是使用<code>SYN-Flood</code>进行攻击，SYN-Flood也就是SYN洪水攻击</p><p>SYN-Flood不会完成TCP三次握手的第三步，也就是不发送确认连接的信息给服务器，这样，服务器无法完成第三次握手，但服务器不会立即放弃，服务器会不停的重试并等待一定的时间后放弃这个未完成的连接，这段时间叫做<code>SYN timeout</code>，这段时间大约30秒-2分钟左右。</p><p>若是一个用户在连接时出现问题导致服务器的一个线程等待1分钟并不是什么大不了的问题，但是若有人用特殊的软件大量模拟这种情况，那后果就可想而知了。一个服务器若是处理这些大量的半连接信息而消耗大量的系统资源和网络带宽，这样服务器就不会再有空余去处理普通用户的正常请求(因为客户的正常请求比率很小)，这样这个服务器就无法工作了，这种攻击就叫做<code>SYN-Flood</code>攻击</p><p>到目前为止，进行DDoS攻击的防御还是比较困难的</p><p>首先，这种攻击的特点是它利用了TCP/IP协议的漏洞，除非你不用TCP/IP，才有可能完全抵御住DDoS攻击</p><p>不过这不等于我们就没有办法阻挡DDoS攻击，我们可以尽力来减少DDoS的攻击</p><p><strong>下面就是一些防御方法:</strong></p><ol><li><p>关闭不必要的服务</p></li><li><p>限制同时打开的SYN半连接数目</p></li><li><p>缩短SYN半连接的time out 时间</p></li><li><p>正确设置防火墙</p></li><li><p>禁止对主机的非开放服务的访问</p></li><li><p>限制特定IP地址的访问</p></li><li><p>启用防火墙的防DDoS的属性</p></li></ol><h2 id="cookie和session" tabindex="-1"><a class="header-anchor" href="#cookie和session" aria-hidden="true">#</a> Cookie和Session</h2><p>Session 是<strong>基于Cookie 实现</strong>的另一种记录服务端和客户端会话状态的机制。</p><p>Session 是存储在服务端，而 SessionId 会被存储在客户端的 Cookie 中。</p><p>Session 的<strong>认证过程</strong>：</p><ol><li>客户端第一次发送请求到服务端，服务端根据信息创建对应的 Session，并在响应头返回 SessionID</li><li>客户端接收到服务端返回的 SessionID 后，会将此信息存储在 Cookie 上，同时会记录这个 SessionID 属于哪个域名</li><li>当客户端再次访问服务端时，请求会自动判断该域名下是否存在 Cookie 信息，如果有则发送给服务端，服务端会从 Cookie 中拿到 SessionID，再根据 SessionID 找到对应的 Session，如果有对应的 Session 则通过，继续执行请求，否则就中断</li></ol><p><strong>Cookie和Session的区别</strong></p><ol><li>安全性，因为 Cookie 可以通过客户端修改，而 Session 只能在服务端设置，所以安全性比 Cookie 高，一般会用于验证用户登录状态</li><li>适用性，Cookie 只能存储字符串数据，而 Session 可以存储任意类型数据</li><li>有效期，Cookie 可以设置任意时间有效，而 Session 一般失效时间短</li></ol><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><h2 id="常见面试题" tabindex="-1"><a class="header-anchor" href="#常见面试题" aria-hidden="true">#</a> 常见面试题</h2><p><strong>在浏览器地址栏键入URL</strong></p><p>1.DNS解析：浏览器会依据URL逐层查询DNS服务器缓存，解析URL中的域名对应的IP地址，DNS缓存从近到远依次是浏览器缓存、系统缓存、路由器缓存、IPS服务器缓存、域名服务器缓存、顶级域名服务器缓存。</p><p>从哪个缓存找到对应的IP直接返回，不再查询后面的缓存。</p><p>2.TCP连接：结合三次握手</p><p>3.发送HTTP请求：浏览器发出读取文件的HTTP请求，该请求发送给服务器</p><p>4.服务器处理请求并返回HTTP报文：服务器对浏览器请求做出响应，把对应的带有HTML文本的HTTP响应报文发送给浏览器</p><p>5.浏览器解析渲染页面</p><p>6.连接结束：浏览器释放TCP连接，该步骤即四次挥手。</p><p>第5步和第6步可以认为是同时发生的，哪一步在前没有特别的要求</p><hr><blockquote><p>作者：月伴飞鱼，转载链接：<a href="https://mp.weixin.qq.com/s/7EddtzpwIRvYfw34QE4zvw" target="_blank" rel="noopener noreferrer">https://mp.weixin.qq.com/s/7EddtzpwIRvYfw34QE4zvw<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 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class="page-title"><h1><!---->BAT大佬的刷题笔记</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月18日</span><meta property="datePublished" content="2022-03-18T02:19:22.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" 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18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category2" role>学习资源</li><meta property="articleSection" content="学习资源"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 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213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 3 分钟</span><meta property="timeRequired" content="PT3M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><p><strong>大家应该都知道，现在的互联网公司面试，只要是研发岗位，基本上都跑不了算法题的折磨，所以大家在准备校招和社招的时候，或者业余时间，还是要多刷刷 LeetCode，保持状态的</strong>。</p><p>需要刷题笔记的小伙伴请扫描下方的二维码关注作者的原创公众号「<strong>沉默王二</strong>」回复关键字「<strong>100</strong>」就可以拉取到下载链接了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongzhonghao.png" alt="扫码关注后回复「100」关键字"></p><blockquote><p>二哥，去年校招前准备算法时，我在 LeetCode 上刷了很多题，但总感觉题虽然刷了很多，解题能力却没怎么提高，怎么解决这种刷题效率低下的问题呢？</p></blockquote><p>这是三个月前一个读者给我的私信，他的困惑让我心有戚戚焉！于是我赶紧问了身边的一些就职于大厂的朋友，他们不约而同地给我推荐了这份刷题笔记。</p><p><img src="https://upload-images.jianshu.io/upload_images/1179389-1a258005b1ace2ff?imageMogr2/auto-orient/strip|imageView2/2/w/1240" alt=""></p><p>细致地研究了一周后，我感觉发现了宝藏！赶紧发给了这位读者。前天，他回复我了，说：“二哥，你太强了，<strong>这刷题笔记好使啊</strong>。我按照上面提供的方法认真地刷了两个月的时间，惊奇地发现算法能力提高了，刷 LeetCode 上中等难度的题目基本不会被卡住了！”</p><p>听他这么一说，我就有信心了，赶紧给我公众号的读者朋友们分享一下。</p><p>这本笔记的作者在 LeetCode 刷了几百道题，并且将题目分门别类地整理好了。包含了 LeetCode Online Judge 所有题目的答案，所有的代码实现是非常优雅且执行效率极高的。</p><p>不管你使用的编程语言是 Java、C++，还是 Go，都可以学习，适合刷题的同学反复学习。认真地揣摩其中的框架思维，你会发现，这是一本非常用心的刷题类书籍。笔记总共 1200 页，分编程技巧、线性表、字符串、栈队列、树、排序、查找、BFS、DFS、贪心、动态规划等。</p><p><img src="https://upload-images.jianshu.io/upload_images/1179389-5903188fb91d382a?imageMogr2/auto-orient/strip|imageView2/2/w/1240" alt=""></p><p>每个章节都会先讲解框架思维，然后挑选非常典型的十几道 LeetCode 题进行实战讲解。这份笔记不仅排版十分精美，内容也异常充实，每一题都是细致的讲解，有时候还会配上图片，就怕你搞不懂，大大的良心啊！</p><p><img src="https://upload-images.jianshu.io/upload_images/1179389-38d3c702ad2c6db5?imageMogr2/auto-orient/strip|imageView2/2/w/1240" alt=""></p><p><img src="https://upload-images.jianshu.io/upload_images/1179389-e69bdf5643318d02?imageMogr2/auto-orient/strip|imageView2/2/w/1240" alt=""></p><p>以前呢，我也很讨厌刷题，觉得这就像古代的八股文一样，又臭又刻板，但互联网的公司都喜欢这么考，因为确实也找不到更好的替代方案，那如果你不准备不去刷 LeetCode 的话，面试必定挂啊！</p><p>经常刷题的读者可能会知道，Beats 100% 是很有难度的：</p><ul><li>代码要言简意赅，一针见血</li><li>算法必须是最优解</li></ul><p>那<strong>这份刷题笔记中所有题目的解答，都是 Beats 100%</strong>，这一点非常难能可贵！也就是说，这份刷题笔记中的解答都是大厂考核时候的标准答案，如果说你吃透了这份刷题笔记，可以吊打面试官了——当然了，吃透会比较难，但如果能应付面试，就直了呀，不不不，就值了呀！</p><p>二哥已经把这份刷题笔记下载好了，需要的小伙伴请扫描下方的二维码关注作者的原创公众号「<strong>沉默王二</strong>」回复关键字「<strong>100</strong>」就可以拉取到下载链接了（无套路，没加密）。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongzhonghao.png" alt="扫码关注后回复「100」关键字"></p><blockquote><p>笔记版权归原作者（霜神）所有，出处：https://books.halfrost.com/leetcode/</p></blockquote></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/download/bat-shuati.md" rel="noopener noreferrer" target="_blank" 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sidebar-link sidebar-page" aria-label="学习建议"><!---->学习建议<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/download/nicearticle.html" class="nav-link sidebar-link sidebar-page" aria-label="优质文章精选集"><!---->优质文章精选集<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/download/history.html" class="nav-link sidebar-link sidebar-page" aria-label="网络日志"><!---->网络日志<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->👏下载→BAT大佬的刷题笔记</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 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class="theme-hope-content"><p><strong>大家应该都知道，现在的互联网公司面试，只要是研发岗位，基本上都跑不了算法题的折磨，所以大家在准备校招和社招的时候，或者业余时间，还是要多刷刷 LeetCode，保持状态的</strong>。</p><p>需要刷题笔记的小伙伴请扫描下方的二维码关注作者的原创公众号「<strong>沉默王二</strong>」回复关键字「<strong>100</strong>」就可以拉取到下载链接了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongzhonghao.png" alt="扫码关注后回复「100」关键字"></p><blockquote><p>二哥，去年校招前准备算法时，我在 LeetCode 上刷了很多题，但总感觉题虽然刷了很多，解题能力却没怎么提高，怎么解决这种刷题效率低下的问题呢？</p></blockquote><p>这是三个月前一个读者给我的私信，他的困惑让我心有戚戚焉！于是我赶紧问了身边的一些就职于大厂的朋友，他们不约而同地给我推荐了这份刷题笔记。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/download/bat-shuati-3660f789-59a4-4310-b565-8253be370904.jpg" alt=""></p><p>细致地研究了一周后，我感觉发现了宝藏！赶紧发给了这位读者。前天，他回复我了，说：“二哥，你太强了，<strong>这刷题笔记好使啊</strong>。我按照上面提供的方法认真地刷了两个月的时间，惊奇地发现算法能力提高了，刷 LeetCode 上中等难度的题目基本不会被卡住了！”</p><p>听他这么一说，我就有信心了，赶紧给我公众号的读者朋友们分享一下。</p><p>这本笔记的作者在 LeetCode 刷了几百道题，并且将题目分门别类地整理好了。包含了 LeetCode Online Judge 所有题目的答案，所有的代码实现是非常优雅且执行效率极高的。</p><p>不管你使用的编程语言是 Java、C++，还是 Go，都可以学习，适合刷题的同学反复学习。认真地揣摩其中的框架思维，你会发现，这是一本非常用心的刷题类书籍。笔记总共 1200 页，分编程技巧、线性表、字符串、栈队列、树、排序、查找、BFS、DFS、贪心、动态规划等。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/download/bat-shuati-8941c10e-e9de-4b50-a6e8-7b50c2a142f7.jpg" alt=""></p><p>每个章节都会先讲解框架思维，然后挑选非常典型的十几道 LeetCode 题进行实战讲解。这份笔记不仅排版十分精美，内容也异常充实，每一题都是细致的讲解，有时候还会配上图片，就怕你搞不懂，大大的良心啊！</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/download/bat-shuati-f2a840fd-a372-4de9-b420-4335a9e0316e.jpg" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/download/bat-shuati-2e751738-1c8d-43b3-8e9b-d7593b62a55e.jpg" alt=""></p><p>以前呢，我也很讨厌刷题，觉得这就像古代的八股文一样，又臭又刻板，但互联网的公司都喜欢这么考，因为确实也找不到更好的替代方案，那如果你不准备不去刷 LeetCode 的话，面试必定挂啊！</p><p>经常刷题的读者可能会知道，Beats 100% 是很有难度的：</p><ul><li>代码要言简意赅，一针见血</li><li>算法必须是最优解</li></ul><p>那<strong>这份刷题笔记中所有题目的解答，都是 Beats 100%</strong>，这一点非常难能可贵！也就是说，这份刷题笔记中的解答都是大厂考核时候的标准答案，如果说你吃透了这份刷题笔记，可以吊打面试官了——当然了，吃透会比较难，但如果能应付面试，就直了呀，不不不，就值了呀！</p><p>二哥已经把这份刷题笔记下载好了，需要的小伙伴请扫描下方的二维码关注作者的原创公众号「<strong>沉默王二</strong>」回复关键字「<strong>100</strong>」就可以拉取到下载链接了（无套路，没加密）。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongzhonghao.png" alt="扫码关注后回复「100」关键字"></p><blockquote><p>笔记版权归原作者（霜神）所有，出处：https://books.halfrost.com/leetcode/</p></blockquote></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/download/bat-shuati.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 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id="java程序员常读书单📚-附下载地址" tabindex="-1"><a class="header-anchor" href="#java程序员常读书单📚-附下载地址" aria-hidden="true">#</a> Java程序员常读书单📚，附下载地址</h1><p>伟大的高尔基曾说过：“书籍是人类进步的阶梯”，读经典的书就好像是站在巨人的肩膀上，视野更开阔，思考问题的方式也会更全面。</p><p>讲真，挺遗憾的，大学期间，我读了不少垃圾书，比如说《21 天学会 xxx》，《3 天教你学会 xxx》。</p><p>直到工作后的第二年，遇到了一个非常 nice 的领导，他给我推荐了不少经典的书单，比如说《代码大全》、《编程珠玑》、《代码整洁之道》、《深入理解计算机系统》等等。</p><p>哇，虽然一开始读得很痛苦，但就这么坚持了一年半的时间，唉，真的发现自己的编程能力在突飞猛进呢，关键是，对业务的理解啊、对架构的设计啊、对代码的编写啊，都有了显著的提升。</p><p>这个书单非常的庞大，为了方便大家查找，我将它们又分门别类地上传到了 GitHub 和码云：</p><ul><li><a href="https://github.com/itwanger/JavaBooks" target="_blank" rel="noopener noreferrer">GitHub备用地址<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://gitee.com/itwanger/JavaBooks" target="_blank" rel="noopener noreferrer">Gitee备用地址<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul><p>上传到 GitHub 和码云上还有一个好处，就是方便大家提需求，如果上面没有你想要的书籍，可以直接提 issue，我看到后就会立马去搜集和整理。</p><p>喜欢的话可以点个 star。</p><p>这是我看过的一些书：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/download/java-1.jpg" alt=""></p><p>那其实很多人在学习编程的时候，很容易陷入一个误区，就是没有计划、没有路线，就导致看似投入了很多精力，但最后的学习效果却有点对不住付出的时间和精力。</p><p>为此，我花了将近一个月的时间，整理了这样一条学习路线，并且把我读过的电子书全部做了归类：<strong>入门→工具→框架→数据库→并发编程→底层→性能优化→设计模式→操作系统→计算机网络→数据结构与算法→面试→架构→管理</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/download/java-2.jpg" alt=""></p><p>就连颈椎康复指南都有了，这波良心吧？大家可以通过下面的方式获取，我想不管是科班还是非科班的，只要你喜欢计算机、喜欢编程，应该都会有很大的帮助。</p><p>需要的小伙伴请扫描下方的二维码关注作者的原创公众号「<strong>沉默王二</strong>」回复关键字「<strong>pdf</strong>」就可以拉取到下载链接了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongzhonghao.png" alt="扫码关注后回复「pdf」关键字"></p><h2 id="一、编程语言" tabindex="-1"><a class="header-anchor" href="#一、编程语言" aria-hidden="true">#</a> 一、编程语言</h2><h3 id="c语言" tabindex="-1"><a class="header-anchor" href="#c语言" aria-hidden="true">#</a> C语言</h3><ul><li>《阮一峰老师的 C语言入门教程》</li><li>《C程序设计语言》</li><li>《C 和指针》</li><li>《C 陷阱与缺陷》</li><li>《C Primer Plus》</li></ul><h3 id="java-语言" tabindex="-1"><a class="header-anchor" href="#java-语言" aria-hidden="true">#</a> Java 语言</h3><ul><li>《二哥的 Java 程序员进阶之路》，GitHub 上已经开源，持续更新</li><li>《Java 编程思想》</li><li>《深入浅出 Java 多线程》</li><li>《深入理解 Java 虚拟机》</li></ul><p>学习任何一门编程语言，一定不要浅尝辄止，因为入门都很容易，进阶却很难。如果只是蜻蜓点水，到最后可能就是竹篮打水一场空，精华的永远也学不到。</p><p>初学阶段，一定要多 coding，coding，coding，千万不要眼高手低。希望我的这份计算机书单能帮助到大家。</p><h3 id="c-语言" tabindex="-1"><a class="header-anchor" href="#c-语言" aria-hidden="true">#</a> C++ 语言</h3><ul><li>《C++ primer》</li><li>《Effective C++》</li><li>《STL源码解析》</li></ul><h3 id="python-语言" tabindex="-1"><a class="header-anchor" href="#python-语言" aria-hidden="true">#</a> Python 语言</h3><ul><li>《流畅的 Python》</li><li>《Python编程：从入门到实践》</li><li>《零基础学 Python》</li><li>《用Python进行自然语言处理》</li></ul><h3 id="javascript-语言" tabindex="-1"><a class="header-anchor" href="#javascript-语言" aria-hidden="true">#</a> JavaScript 语言</h3><ul><li>《JavaScript 王者归来》</li><li>《你不知道的 JavaScript》</li><li>《JavaScript 高级程序设计》</li></ul><h2 id="二、数据结构与算法" tabindex="-1"><a class="header-anchor" href="#二、数据结构与算法" aria-hidden="true">#</a> 二、数据结构与算法</h2><ul><li>《算法导论》</li><li>《算法 4》</li><li>《编程珠玑》</li><li>《编程之美》</li><li>《趣学数据结构》</li></ul><h2 id="三、计算机基础" tabindex="-1"><a class="header-anchor" href="#三、计算机基础" aria-hidden="true">#</a> 三、计算机基础</h2><h3 id="操作系统" tabindex="-1"><a class="header-anchor" href="#操作系统" aria-hidden="true">#</a> 操作系统</h3><ul><li>《现代操作系统》</li><li>《鸟哥的 Linux 私房菜》</li></ul><h3 id="计算机组成原理" tabindex="-1"><a class="header-anchor" href="#计算机组成原理" aria-hidden="true">#</a> 计算机组成原理</h3><ul><li>《程序是如何跑起来的》</li><li>《计算机是如何跑起来的》</li><li>《编码：隐匿在计算机软硬件背后的语言》</li></ul><h3 id="计算机网络" tabindex="-1"><a class="header-anchor" href="#计算机网络" aria-hidden="true">#</a> 计算机网络</h3><ul><li>《图解 HTTP》</li><li>《图解 TCP/IP》</li><li>《计算机网络自顶向下》</li><li>《网络是怎样连接的》</li></ul><h3 id="数据库" tabindex="-1"><a class="header-anchor" href="#数据库" aria-hidden="true">#</a> 数据库</h3><ul><li>《SQL必知必会》</li><li>《高性能 MySQL》</li><li>《MySQL技术内幕 InnoDB存储引擎》</li><li>《Redis 深度历险：核心原理与应用实践》</li></ul><h3 id="四、编程实战" tabindex="-1"><a class="header-anchor" href="#四、编程实战" aria-hidden="true">#</a> 四、编程实战</h3><ul><li>《代码整洁之道》</li><li>《阿里巴巴 Java 开发手册》</li><li>《重构：改善既有代码的设计》</li><li>《Effective Java》</li></ul><h3 id="五、代码人生" tabindex="-1"><a class="header-anchor" href="#五、代码人生" aria-hidden="true">#</a> 五、代码人生</h3><ul><li>《黑客与画家》</li><li>《人月神话》</li><li>《人件》</li><li>《代码大全》</li><li>《数学之美》</li><li>《图灵的秘密》</li></ul><p>。。。。持续更新</p><p>当然了，我个人是有局限性的，如果大家有什么好书也可以推荐给我，我更新上来，也为后来者提供一个更体系化的书单。</p><p>讲真心话，随着时间的推移，我对整个计算机体系的认知也更加全面和深刻了，那这份书单真的希望能帮助到大家。</p><p>需要的小伙伴请扫描下方的二维码关注作者的原创公众号「<strong>沉默王二</strong>」回复关键字「<strong>pdf</strong>」就可以拉取到下载链接了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongzhonghao.png" alt="扫码关注后回复「pdf」关键字"></p><p>几年后，你将是一名善于解决实际问题的工程师，而不是一名普普通通的码农。</p><blockquote><p>毋庸置疑，这是一条坎坷的路，但学弟学妹们就是来披荆斩棘的，对吧？</p></blockquote></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a 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aria-label="优质文章精选集"><!---->优质文章精选集<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/download/history.html" class="nav-link sidebar-link sidebar-page" aria-label="网络日志"><!---->网络日志<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java程序员常读书单📚，附下载地址</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 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语言</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/download/java.html#二、数据结构与算法" class="router-link-active router-link-exact-active toc-link level2">二、数据结构与算法</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/download/java.html#三、计算机基础" class="router-link-active router-link-exact-active toc-link level2">三、计算机基础</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/download/java.html#操作系统" class="router-link-active router-link-exact-active toc-link level3">操作系统</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/download/java.html#计算机组成原理" class="router-link-active router-link-exact-active toc-link level3">计算机组成原理</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/download/java.html#计算机网络" class="router-link-active router-link-exact-active toc-link level3">计算机网络</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/download/java.html#数据库" class="router-link-active router-link-exact-active toc-link level3">数据库</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/download/java.html#四、编程实战" class="router-link-active router-link-exact-active toc-link level3">四、编程实战</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/download/java.html#五、代码人生" class="router-link-active router-link-exact-active toc-link level3">五、代码人生</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><p>伟大的高尔基曾说过：“书籍是人类进步的阶梯”，读经典的书就好像是站在巨人的肩膀上，视野更开阔，思考问题的方式也会更全面。</p><p>讲真，挺遗憾的，大学期间，我读了不少垃圾书，比如说《21 天学会 xxx》，《3 天教你学会 xxx》。</p><p>直到工作后的第二年，遇到了一个非常 nice 的领导，他给我推荐了不少经典的书单，比如说《代码大全》、《编程珠玑》、《代码整洁之道》、《深入理解计算机系统》等等。</p><p>哇，虽然一开始读得很痛苦，但就这么坚持了一年半的时间，唉，真的发现自己的编程能力在突飞猛进呢，关键是，对业务的理解啊、对架构的设计啊、对代码的编写啊，都有了显著的提升。</p><p>这个书单非常的庞大，为了方便大家查找，我将它们又分门别类地上传到了 GitHub 和码云：</p><ul><li><a href="https://github.com/itwanger/JavaBooks" target="_blank" rel="noopener noreferrer">GitHub备用地址<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://gitee.com/itwanger/JavaBooks" target="_blank" rel="noopener noreferrer">Gitee备用地址<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul><p>上传到 GitHub 和码云上还有一个好处，就是方便大家提需求，如果上面没有你想要的书籍，可以直接提 issue，我看到后就会立马去搜集和整理。</p><p>喜欢的话可以点个 star。</p><p>这是我看过的一些书：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/download/java-1.jpg" alt=""></p><p>那其实很多人在学习编程的时候，很容易陷入一个误区，就是没有计划、没有路线，就导致看似投入了很多精力，但最后的学习效果却有点对不住付出的时间和精力。</p><p>为此，我花了将近一个月的时间，整理了这样一条学习路线，并且把我读过的电子书全部做了归类：<strong>入门→工具→框架→数据库→并发编程→底层→性能优化→设计模式→操作系统→计算机网络→数据结构与算法→面试→架构→管理</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/download/java-2.jpg" alt=""></p><p>就连颈椎康复指南都有了，这波良心吧？大家可以通过下面的方式获取，我想不管是科班还是非科班的，只要你喜欢计算机、喜欢编程，应该都会有很大的帮助。</p><p>需要的小伙伴请扫描下方的二维码关注作者的原创公众号「<strong>沉默王二</strong>」回复关键字「<strong>pdf</strong>」就可以拉取到下载链接了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongzhonghao.png" alt="扫码关注后回复「pdf」关键字"></p><h2 id="一、编程语言" tabindex="-1"><a class="header-anchor" href="#一、编程语言" aria-hidden="true">#</a> 一、编程语言</h2><h3 id="c语言" tabindex="-1"><a class="header-anchor" href="#c语言" aria-hidden="true">#</a> C语言</h3><ul><li>《阮一峰老师的 C语言入门教程》</li><li>《C程序设计语言》</li><li>《C 和指针》</li><li>《C 陷阱与缺陷》</li><li>《C Primer Plus》</li></ul><h3 id="java-语言" tabindex="-1"><a class="header-anchor" href="#java-语言" aria-hidden="true">#</a> Java 语言</h3><ul><li>《二哥的 Java 程序员进阶之路》，GitHub 上已经开源，持续更新</li><li>《Java 编程思想》</li><li>《深入浅出 Java 多线程》</li><li>《深入理解 Java 虚拟机》</li></ul><p>学习任何一门编程语言，一定不要浅尝辄止，因为入门都很容易，进阶却很难。如果只是蜻蜓点水，到最后可能就是竹篮打水一场空，精华的永远也学不到。</p><p>初学阶段，一定要多 coding，coding，coding，千万不要眼高手低。希望我的这份计算机书单能帮助到大家。</p><h3 id="c-语言" tabindex="-1"><a class="header-anchor" href="#c-语言" aria-hidden="true">#</a> C++ 语言</h3><ul><li>《C++ primer》</li><li>《Effective C++》</li><li>《STL源码解析》</li></ul><h3 id="python-语言" tabindex="-1"><a class="header-anchor" href="#python-语言" aria-hidden="true">#</a> Python 语言</h3><ul><li>《流畅的 Python》</li><li>《Python编程：从入门到实践》</li><li>《零基础学 Python》</li><li>《用Python进行自然语言处理》</li></ul><h3 id="javascript-语言" tabindex="-1"><a class="header-anchor" href="#javascript-语言" aria-hidden="true">#</a> JavaScript 语言</h3><ul><li>《JavaScript 王者归来》</li><li>《你不知道的 JavaScript》</li><li>《JavaScript 高级程序设计》</li></ul><h2 id="二、数据结构与算法" tabindex="-1"><a class="header-anchor" href="#二、数据结构与算法" aria-hidden="true">#</a> 二、数据结构与算法</h2><ul><li>《算法导论》</li><li>《算法 4》</li><li>《编程珠玑》</li><li>《编程之美》</li><li>《趣学数据结构》</li></ul><h2 id="三、计算机基础" tabindex="-1"><a class="header-anchor" href="#三、计算机基础" aria-hidden="true">#</a> 三、计算机基础</h2><h3 id="操作系统" tabindex="-1"><a class="header-anchor" href="#操作系统" aria-hidden="true">#</a> 操作系统</h3><ul><li>《现代操作系统》</li><li>《鸟哥的 Linux 私房菜》</li></ul><h3 id="计算机组成原理" tabindex="-1"><a class="header-anchor" href="#计算机组成原理" aria-hidden="true">#</a> 计算机组成原理</h3><ul><li>《程序是如何跑起来的》</li><li>《计算机是如何跑起来的》</li><li>《编码：隐匿在计算机软硬件背后的语言》</li></ul><h3 id="计算机网络" tabindex="-1"><a class="header-anchor" href="#计算机网络" aria-hidden="true">#</a> 计算机网络</h3><ul><li>《图解 HTTP》</li><li>《图解 TCP/IP》</li><li>《计算机网络自顶向下》</li><li>《网络是怎样连接的》</li></ul><h3 id="数据库" tabindex="-1"><a class="header-anchor" href="#数据库" aria-hidden="true">#</a> 数据库</h3><ul><li>《SQL必知必会》</li><li>《高性能 MySQL》</li><li>《MySQL技术内幕 InnoDB存储引擎》</li><li>《Redis 深度历险：核心原理与应用实践》</li></ul><h3 id="四、编程实战" tabindex="-1"><a class="header-anchor" href="#四、编程实战" aria-hidden="true">#</a> 四、编程实战</h3><ul><li>《代码整洁之道》</li><li>《阿里巴巴 Java 开发手册》</li><li>《重构：改善既有代码的设计》</li><li>《Effective Java》</li></ul><h3 id="五、代码人生" tabindex="-1"><a class="header-anchor" href="#五、代码人生" aria-hidden="true">#</a> 五、代码人生</h3><ul><li>《黑客与画家》</li><li>《人月神话》</li><li>《人件》</li><li>《代码大全》</li><li>《数学之美》</li><li>《图灵的秘密》</li></ul><p>。。。。持续更新</p><p>当然了，我个人是有局限性的，如果大家有什么好书也可以推荐给我，我更新上来，也为后来者提供一个更体系化的书单。</p><p>讲真心话，随着时间的推移，我对整个计算机体系的认知也更加全面和深刻了，那这份书单真的希望能帮助到大家。</p><p>需要的小伙伴请扫描下方的二维码关注作者的原创公众号「<strong>沉默王二</strong>」回复关键字「<strong>pdf</strong>」就可以拉取到下载链接了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongzhonghao.png" alt="扫码关注后回复「pdf」关键字"></p><p>几年后，你将是一名善于解决实际问题的工程师，而不是一名普普通通的码农。</p><blockquote><p>毋庸置疑，这是一条坎坷的路，但学弟学妹们就是来披荆斩棘的，对吧？</p></blockquote></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/download/java.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 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class="page-title"><h1><!---->简历下载</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" 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80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 11 分钟</span><meta property="timeRequired" content="PT11M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/download/jianli.html#专业技能" class="router-link-active router-link-exact-active toc-link level3">专业技能</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/download/jianli.html#项目经历" class="router-link-active router-link-exact-active toc-link level3">项目经历</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/download/jianli.html#工作经历、教育经历、奖项证书" class="router-link-active router-link-exact-active toc-link level3">工作经历、教育经历、奖项证书</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/download/jianli.html#简历模板下载方式" class="router-link-active router-link-exact-active toc-link level3">简历模板下载方式</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><p>大家好，我是二哥呀。</p><p>随着校招季的到来，不少同学都准备找工作了，也陆陆续续有同学找我看简历以及修改简历。</p><p>其实我以前就分享过自己的简历写法和迭代完善的过程，可能有同学没来得及看。今天客户从长沙远道而来，我要接待，所以没时间自己写了，就转一篇阿秀的文章给大家参照下。</p><p>需要简历模板的小伙伴请扫描下方的二维码关注作者的原创公众号「<strong>沉默王二</strong>」回复关键字「<strong>简历</strong>」就可以拉取到下载链接了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongzhonghao.png" alt="扫码关注后回复「简历」关键字"></p><p>这位学弟说自己在秋招的时候没用心找工作，等毕业后才发现找的工作不满意，勉强干了半年就不想干了，然后走的社招，发现社招比校招要难一点。</p><p>在正式分享简历修改案例前，二哥先简单总结一下校招和社招吧。</p><p><strong>校招看基础、潜力，社招看能力、即战力</strong>。</p><p><strong>校招</strong>，对于某些技术问题你可以不懂不会，没关系，看的是你的潜力，你的基本功。框架不会？没事，学就是了。</p><p><strong>社招</strong>，并不是的，社招看的是你的过往经历以及你解决问题的能力。人家招你过来是需要你来干活的，不是让你来带薪学习的，公司又不是慈善机构啊。</p><p>所以希望还是在校的学弟学妹们好好学学计算机基本功，打打基础。</p><p>程序员内功是很重要的，比如操作系统、计算机网络、数据库、计算机组成原理这些。</p><p>好了，废话不多说，开始今天的主题吧。</p><p>以下内容涉及到这位学弟的一些关键信息已脱敏，不影响大家阅读，我按照修改模块给大家分享。</p><h3 id="专业技能" tabindex="-1"><a class="header-anchor" href="#专业技能" aria-hidden="true">#</a> 专业技能</h3><p>首先来看一下这位学弟的专业技能部分。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/download/jianli-2c93d164-55f7-4d2f-b0d0-f0857644a265.jpg" alt=""></p><p>其实，这部分他写的已经挺好的了，简单大方、条理清晰。</p><p>也能从他的专业技能描述看出来这位学弟挺厉害的，可还是有些不足之处，我也想相应的给出了一些建议和意见。</p><p><strong>修改意见</strong></p><p>1、<strong>编程语言</strong>部分的第一句话我建议他改一下，因为原文说的有点冗余。我建议他改成“熟悉C++编程语言，基本功扎实，熟练掌握STL模板库”。</p><p>后面的“阅读源码”我建议是不加的，因为STL下的思想确实比较精妙，如果别人抓住你的“阅读过部分源码”这几个字使劲问你，十有八九要吃不消，保险起见还是不要加上为好。你需要对你简历上的每一个字，或者说每一个标点符号负责。</p><p>2、<strong>数据结构</strong>部分，其实他写的挺好的了，我建议他写得更精炼具体一点，<strong>将原文</strong>“  熟悉常用算法(Leetcode 200道)、数据结构 (链表、栈、队列、哈希表、二叉树、B/B+树、红黑树等)  ”<strong>改为</strong>“熟悉常见数据结构与算法，如链表、栈、哈希表、二叉树等，以74%正确率通过力扣网站 214 道算法题”。</p><p>因为74%的正确率这种很精确的数字指标给面试官的直观感受更<strong>具象</strong>一些，并且这个正确率在力扣官网上也是可查的。</p><p>3、<strong>设计模式</strong>部分，其实他写的有点多了。对于校招而言，在设计模式上考察的并不多，没必要。</p><p>我建议他<strong>改成</strong>“了解常用设计模式如单例模式、工厂模式等”。这么写的目的也是为了方式一种情况的出现，那就是面试官很可能不问你单例、工厂，他会问你一句，你还会不会其他的设计模式，这个时候，你就可以回答“还会观察者、迭代器模式等”</p><p>4、<strong>数据库</strong>部分，感觉这位小学弟有点目标过于明显了。</p><p>他的<strong>原文是</strong>“  熟悉 MySQL 关系型数据库、Redis 非关系型数据库，了解 MySQL 查询性能优化相关技术，Redis 五大数据类型，持久化机制以及主从复制技术  ”这就相当于直接让面试官问你Redis的五种数据结构是什么？持久化、主从复制又是什么了？</p><p>面试官又不是傻子...</p><p>我建议他改成“熟悉关系型数据库MySQL、内存型数据库Redis，了解常见查询优化技术。”这样稍微委婉一些。。。</p><p>下面是我当时给他的修改意见。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/download/jianli-f5c60946-3cdd-4ac6-9e20-8360808f8612.jpg" alt=""></p><h3 id="项目经历" tabindex="-1"><a class="header-anchor" href="#项目经历" aria-hidden="true">#</a> 项目经历</h3><p>其实一份校招简历，最重要的就是项目经历、实习经历（有则加分，没有也行）、专业技能了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/download/jianli-a715eaa8-86c5-41ce-aee7-cd1873e2eec8.jpg" alt=""></p><p>可以从这位学弟的描述中看出来，他毕业后的这四个月里确实做了不少的工作，但感觉没说出来自己所做工作的意义和难点所在。</p><p>你可能觉得没什么，但那才是面试官在意的地方。</p><p>设身处地的想，如果你是一个面试官，你也希望招来的新鲜血液能力越强越好。那能力强不强在面试初期就是通过你的实习经历或者项目经验体现的啊。</p><p><strong>针对第一个项目，二哥给出了几点修改意见</strong>：</p><p>1、一个项目，你承担的角色是什么？主要负责人还是核心成员？包括项目的起始时间要注明。</p><p>2、对于其中的数据库密码验证。我建议他去掉，因为有点水平较低，还不如不写。虽说后端都是增删改查，但你不能直接说你就是搞了个密码验证啊，你这也太耿直了吧。</p><p>3、技术亮点部分描述不够清楚，虽然这位学弟做了很多工作，可从他的描述中是看不出来什么工作的，我给他换了一种说法。</p><p><strong>技术亮点原文描述</strong>：</p><p>实现与 bash 几乎完全相同的 cd 功能；使用边缘触发优化 epoll 频繁响应，使用进程池与线程池减少 CPU 运转负载；超时断开，针对连接上的客户端，若超过 30 秒未发送任何请求，断开连接，并使用环形队列技术实现高并发  ；</p><p>其实他写的挺好的了，但我还是觉得差点意思，就是说的太白话了一些，所以我用自己的语言帮他加工润色了一下，下面是我的修改版。</p><p><strong>技术亮点修改版</strong>：</p><p>1、实现与 bash 几乎完全相同的 cd 功能，但反应时间更短</p><p>2、使用epoll边缘触发进行频繁响应，并辅助以进程池和线程池技术来减少CPU运转负载，增加系统CPU利用率</p><p>3、智能化断开设计：使用环形队列技术实现高并发，对于30秒内无任何网络包交互的连接进行强制断开处理，有效XXXX。</p><p><strong>是不是感觉瞬间好一点了</strong>。。。。我只能说，<strong>中华语言，博大精深，不服不行</strong>。</p><p>以下是修改意见标注</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/download/jianli-5b6ff7c0-c8ad-4874-8ee8-7593e3ee1f5f.jpg" alt=""></p><p>至此，帮他把第一个项目修改完毕了，<strong>针对第二个项目的修改</strong>，我就不多BB了，直接贴上来吧。</p><p><strong>以下是我给出的修改意见</strong>：</p><p>这个项目名改成：汽车出行APP 缺少你的角色 和 项目起始时间 该APP主要业务是什么？最终的功能有哪些？然后写上自己在其中的工作。个人工作对于该APP的加成在哪里，需要具体的量化词。</p><p>技术亮点中的删除相似网页，删除正确率有多少，针对该APP某某缺陷和不足，提出建立倒排索引技术，推送强相关的网页，最终提升点击率XX.XX%。</p><p>最后写上个人收获：学到了哪些？对XXX有了更深的认识和了解</p><p><strong>下面是当时给他做的标注</strong>：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/download/jianli-f2aec848-d462-491b-9fe1-7d939ea16ed8.jpg" alt=""></p><p>其实对于该部分的修改，我是紧紧抓住一个要点，那就是尽可能使用具化的指标即明确的信息而不是概括性的描述。</p><p>比如直接告诉别人提升了XX%，而不是说一句“有着较好的提升效果”；直接告诉别人“项目优化了XX秒，相较于上一版本速度加快了XX%”，而不是”经过XX技术，速度有了较大提高“。</p><p>这一点，我在自己的简历修改迭代文章中也提到过，很重要，特别重要，具化的指标信息给人的第一感觉就是不一样的。</p><h3 id="工作经历、教育经历、奖项证书" tabindex="-1"><a class="header-anchor" href="#工作经历、教育经历、奖项证书" aria-hidden="true">#</a> 工作经历、教育经历、奖项证书</h3><p>这里比较类似，我就一起放上来说了</p><p>首先是原文。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/download/jianli-eabee6e7-0fcf-4fb7-9ca8-0ada1c604acf.jpg" alt=""></p><p>我给的修改意见批注。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/download/jianli-bb7279ad-dd46-47ea-8f13-37d5caaf404e.jpg" alt=""></p><p>1、在工作经历这里，注意细节问题，比如你的岗位名称是什么？你在实习过程中，你的工作有哪些？在这过程中用到了哪些技能？</p><p>不要直接就是一句话写出来，不明不白的，没什么愿意看的。人都是视觉动物，都希望看到整齐有序的内容。</p><p>这里的整齐有序不仅要求你的排版整齐，你想要表达的意思也要有序。</p><p>比如把你的工作或者实习分为团队工作、个人工作、个人收获，挨个展开。</p><p>2、由于这位学弟已经毕业了，已经不能再以校招身份去面试找工作了，所以教育经历这里其实已经没必要写在校学习的课程了。</p><p>一旦你踏入社会，失去了应届生身份你就不再是校招生了，这个时候看的就是你的能力了。</p><p>3、对于一些细节问题记得做好，关键字该加粗加粗。比如有分量的国奖还是值得一个加粗显示的。</p><p>4、如果你过了六级，那直接写<strong>六级</strong>，分数还可以的话就写上分数；分数比较低的话，比如430这种刚飘过，就写六级就行。</p><p>如果六级没过，那就写上四级吧。</p><h3 id="简历模板下载方式" tabindex="-1"><a class="header-anchor" href="#简历模板下载方式" aria-hidden="true">#</a> 简历模板下载方式</h3><p>我把这位小学弟和我自己以前的简历模板放在一起了，需要简历模板的小伙伴请扫描下方的二维码关注作者的原创公众号「<strong>沉默王二</strong>」回复关键字「<strong>简历</strong>」就可以拉取到下载链接了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongzhonghao.png" alt="扫码关注后回复「简历」关键字"></p><p>记住！简历并不是单纯意义上的自我介绍，比如说我是沉默王二，今年 18 岁，来自洛阳，毕业于某某学校。这样的简历太苍白了。</p><p>简历就好像电梯广告的单页一样，它富有鲜活的生命力，它在呐喊，它不需要过多的润色，只需要铿锵有力、赤裸裸的“炫耀”。</p><p>比如说我是沉默王二， 2019 年参与了 XXX 项目的开发。作为项目团队的核心 开发人员，我不仅能够提前完成自己的开发任务，还设计了一个高效的缓存中间件，大大提高了系统的性能。</p><p>该中间件上线后，Web 前端性能从 10 QPS 提升到 120 QPS，服务器由 10 台缩减为 5 台。</p><p>鉴于之前的良好表现，我在 2020 年升任项目的主要负责人，虽然小组成员只有 15 个，但硬生生地肩负起了每天超过 2000 万的 PV。</p><p>看，这样的简历是不是让人耳目一新，证明自己价值的同时，没有过多的粉饰，让招聘方觉得你很靠谱，迫切地想要把你这个人才“抢”到手，免费被别的公司挖走了。</p><p>简历上的内容不要太多，尽量不要超过一页，因为招聘方没有那么多时间去翻看你的简历。我是挺相信第一印象的，好的简历看一眼就会过目不忘，真的。</p><p>我是二哥呀，人生最可怕的事莫过于在别人放弃你之前，你先放弃了自己，我们下期再见。</p><blockquote><p>作者：阿秀，转载链接：<a href="https://mp.weixin.qq.com/s/soVldFzBbqwm_vM35afFvg" target="_blank" rel="noopener noreferrer">https://mp.weixin.qq.com/s/soVldFzBbqwm_vM35afFvg<span><svg 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class="theme-hope-content"><p>大家好，我是二哥呀。随着校招季的到来，不少同学都准备找工作了，也陆陆续续有同学找我看简历以及修改简历。</p><p>其实我以前就分享过自己的简历写法和迭代完善的过程，可能有同学没来得及看。今天客户从长沙远道而来，我要接待，所以没时间自己写了，就转一篇阿秀的文章给大家参照下。</p><p>需要简历模板的小伙伴请扫描下方的二维码关注作者的原创公众号「<strong>沉默王二</strong>」回复关键字「<strong>简历</strong>」就可以拉取到下载链接了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongzhonghao.png" alt="扫码关注后回复「简历」关键字"></p><p>这位学弟说自己在秋招的时候没用心找工作，等毕业后才发现找的工作不满意，勉强干了半年就不想干了，然后走的社招，发现社招比校招要难一点。</p><p>在正式分享简历修改案例前，二哥先简单总结一下校招和社招吧。</p><p><strong>校招看基础、潜力，社招看能力、即战力</strong>。</p><p><strong>校招</strong>，对于某些技术问题你可以不懂不会，没关系，看的是你的潜力，你的基本功。框架不会？没事，学就是了。</p><p><strong>社招</strong>，并不是的，社招看的是你的过往经历以及你解决问题的能力。人家招你过来是需要你来干活的，不是让你来带薪学习的，公司又不是慈善机构啊。</p><p>所以希望还是在校的学弟学妹们好好学学计算机基本功，打打基础。</p><p>程序员内功是很重要的，比如操作系统、计算机网络、数据库、计算机组成原理这些。</p><p>好了，废话不多说，开始今天的主题吧。</p><p>以下内容涉及到这位学弟的一些关键信息已脱敏，不影响大家阅读，我按照修改模块给大家分享。</p><h3 id="专业技能" tabindex="-1"><a class="header-anchor" href="#专业技能" aria-hidden="true">#</a> 专业技能</h3><p>首先来看一下这位学弟的专业技能部分。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/download/jianli-2c93d164-55f7-4d2f-b0d0-f0857644a265.jpg" alt=""></p><p>其实，这部分他写的已经挺好的了，简单大方、条理清晰。</p><p>也能从他的专业技能描述看出来这位学弟挺厉害的，可还是有些不足之处，我也想相应的给出了一些建议和意见。</p><p><strong>修改意见</strong></p><p>1、<strong>编程语言</strong>部分的第一句话我建议他改一下，因为原文说的有点冗余。我建议他改成“熟悉C++编程语言，基本功扎实，熟练掌握STL模板库”。</p><p>后面的“阅读源码”我建议是不加的，因为STL下的思想确实比较精妙，如果别人抓住你的“阅读过部分源码”这几个字使劲问你，十有八九要吃不消，保险起见还是不要加上为好。你需要对你简历上的每一个字，或者说每一个标点符号负责。</p><p>2、<strong>数据结构</strong>部分，其实他写的挺好的了，我建议他写得更精炼具体一点，<strong>将原文</strong>“  熟悉常用算法(Leetcode 200道)、数据结构 (链表、栈、队列、哈希表、二叉树、B/B+树、红黑树等)  ”<strong>改为</strong>“熟悉常见数据结构与算法，如链表、栈、哈希表、二叉树等，以74%正确率通过力扣网站 214 道算法题”。</p><p>因为74%的正确率这种很精确的数字指标给面试官的直观感受更<strong>具象</strong>一些，并且这个正确率在力扣官网上也是可查的。</p><p>3、<strong>设计模式</strong>部分，其实他写的有点多了。对于校招而言，在设计模式上考察的并不多，没必要。</p><p>我建议他<strong>改成</strong>“了解常用设计模式如单例模式、工厂模式等”。这么写的目的也是为了方式一种情况的出现，那就是面试官很可能不问你单例、工厂，他会问你一句，你还会不会其他的设计模式，这个时候，你就可以回答“还会观察者、迭代器模式等”</p><p>4、<strong>数据库</strong>部分，感觉这位小学弟有点目标过于明显了。</p><p>他的<strong>原文是</strong>“  熟悉 MySQL 关系型数据库、Redis 非关系型数据库，了解 MySQL 查询性能优化相关技术，Redis 五大数据类型，持久化机制以及主从复制技术  ”这就相当于直接让面试官问你Redis的五种数据结构是什么？持久化、主从复制又是什么了？</p><p>面试官又不是傻子...</p><p>我建议他改成“熟悉关系型数据库MySQL、内存型数据库Redis，了解常见查询优化技术。”这样稍微委婉一些。。。</p><p>下面是我当时给他的修改意见。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/download/jianli-f5c60946-3cdd-4ac6-9e20-8360808f8612.jpg" alt=""></p><h3 id="项目经历" tabindex="-1"><a class="header-anchor" href="#项目经历" aria-hidden="true">#</a> 项目经历</h3><p>其实一份校招简历，最重要的就是项目经历、实习经历（有则加分，没有也行）、专业技能了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/download/jianli-a715eaa8-86c5-41ce-aee7-cd1873e2eec8.jpg" alt=""></p><p>可以从这位学弟的描述中看出来，他毕业后的这四个月里确实做了不少的工作，但感觉没说出来自己所做工作的意义和难点所在。</p><p>你可能觉得没什么，但那才是面试官在意的地方。</p><p>设身处地的想，如果你是一个面试官，你也希望招来的新鲜血液能力越强越好。那能力强不强在面试初期就是通过你的实习经历或者项目经验体现的啊。</p><p><strong>针对第一个项目，二哥给出了几点修改意见</strong>：</p><p>1、一个项目，你承担的角色是什么？主要负责人还是核心成员？包括项目的起始时间要注明。</p><p>2、对于其中的数据库密码验证。我建议他去掉，因为有点水平较低，还不如不写。虽说后端都是增删改查，但你不能直接说你就是搞了个密码验证啊，你这也太耿直了吧。</p><p>3、技术亮点部分描述不够清楚，虽然这位学弟做了很多工作，可从他的描述中是看不出来什么工作的，我给他换了一种说法。</p><p><strong>技术亮点原文描述</strong>：</p><p>实现与 bash 几乎完全相同的 cd 功能；使用边缘触发优化 epoll 频繁响应，使用进程池与线程池减少 CPU 运转负载；超时断开，针对连接上的客户端，若超过 30 秒未发送任何请求，断开连接，并使用环形队列技术实现高并发  ；</p><p>其实他写的挺好的了，但我还是觉得差点意思，就是说的太白话了一些，所以我用自己的语言帮他加工润色了一下，下面是我的修改版。</p><p><strong>技术亮点修改版</strong>：</p><p>1、实现与 bash 几乎完全相同的 cd 功能，但反应时间更短</p><p>2、使用epoll边缘触发进行频繁响应，并辅助以进程池和线程池技术来减少CPU运转负载，增加系统CPU利用率</p><p>3、智能化断开设计：使用环形队列技术实现高并发，对于30秒内无任何网络包交互的连接进行强制断开处理，有效XXXX。</p><p><strong>是不是感觉瞬间好一点了</strong>。。。。我只能说，<strong>中华语言，博大精深，不服不行</strong>。</p><p>以下是修改意见标注</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/download/jianli-5b6ff7c0-c8ad-4874-8ee8-7593e3ee1f5f.jpg" alt=""></p><p>至此，帮他把第一个项目修改完毕了，<strong>针对第二个项目的修改</strong>，我就不多BB了，直接贴上来吧。</p><p><strong>以下是我给出的修改意见</strong>：</p><p>这个项目名改成：汽车出行APP 缺少你的角色 和 项目起始时间 该APP主要业务是什么？最终的功能有哪些？然后写上自己在其中的工作。个人工作对于该APP的加成在哪里，需要具体的量化词。</p><p>技术亮点中的删除相似网页，删除正确率有多少，针对该APP某某缺陷和不足，提出建立倒排索引技术，推送强相关的网页，最终提升点击率XX.XX%。</p><p>最后写上个人收获：学到了哪些？对XXX有了更深的认识和了解</p><p><strong>下面是当时给他做的标注</strong>：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/download/jianli-f2aec848-d462-491b-9fe1-7d939ea16ed8.jpg" alt=""></p><p>其实对于该部分的修改，我是紧紧抓住一个要点，那就是尽可能使用具化的指标即明确的信息而不是概括性的描述。</p><p>比如直接告诉别人提升了XX%，而不是说一句“有着较好的提升效果”；直接告诉别人“项目优化了XX秒，相较于上一版本速度加快了XX%”，而不是”经过XX技术，速度有了较大提高“。</p><p>这一点，我在自己的简历修改迭代文章中也提到过，很重要，特别重要，具化的指标信息给人的第一感觉就是不一样的。</p><h3 id="工作经历、教育经历、奖项证书" tabindex="-1"><a class="header-anchor" href="#工作经历、教育经历、奖项证书" aria-hidden="true">#</a> 工作经历、教育经历、奖项证书</h3><p>这里比较类似，我就一起放上来说了</p><p>首先是原文。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/download/jianli-eabee6e7-0fcf-4fb7-9ca8-0ada1c604acf.jpg" alt=""></p><p>我给的修改意见批注。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/download/jianli-bb7279ad-dd46-47ea-8f13-37d5caaf404e.jpg" alt=""></p><p>1、在工作经历这里，注意细节问题，比如你的岗位名称是什么？你在实习过程中，你的工作有哪些？在这过程中用到了哪些技能？</p><p>不要直接就是一句话写出来，不明不白的，没什么愿意看的。人都是视觉动物，都希望看到整齐有序的内容。</p><p>这里的整齐有序不仅要求你的排版整齐，你想要表达的意思也要有序。</p><p>比如把你的工作或者实习分为团队工作、个人工作、个人收获，挨个展开。</p><p>2、由于这位学弟已经毕业了，已经不能再以校招身份去面试找工作了，所以教育经历这里其实已经没必要写在校学习的课程了。</p><p>一旦你踏入社会，失去了应届生身份你就不再是校招生了，这个时候看的就是你的能力了。</p><p>3、对于一些细节问题记得做好，关键字该加粗加粗。比如有分量的国奖还是值得一个加粗显示的。</p><p>4、如果你过了六级，那直接写<strong>六级</strong>，分数还可以的话就写上分数；分数比较低的话，比如430这种刚飘过，就写六级就行。</p><p>如果六级没过，那就写上四级吧。</p><h3 id="简历模板下载方式" tabindex="-1"><a class="header-anchor" href="#简历模板下载方式" aria-hidden="true">#</a> 简历模板下载方式</h3><p>我把这位小学弟和我自己以前的简历模板放在一起了，需要简历模板的小伙伴请扫描下方的二维码关注作者的原创公众号「<strong>沉默王二</strong>」回复关键字「<strong>简历</strong>」就可以拉取到下载链接了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongzhonghao.png" alt="扫码关注后回复「简历」关键字"></p><p>记住！简历并不是单纯意义上的自我介绍，比如说我是沉默王二，今年 18 岁，来自洛阳，毕业于某某学校。这样的简历太苍白了。</p><p>简历就好像电梯广告的单页一样，它富有鲜活的生命力，它在呐喊，它不需要过多的润色，只需要铿锵有力、赤裸裸的“炫耀”。</p><p>比如说我是沉默王二， 2019 年参与了 XXX 项目的开发。作为项目团队的核心 开发人员，我不仅能够提前完成自己的开发任务，还设计了一个高效的缓存中间件，大大提高了系统的性能。</p><p>该中间件上线后，Web 前端性能从 10 QPS 提升到 120 QPS，服务器由 10 台缩减为 5 台。</p><p>鉴于之前的良好表现，我在 2020 年升任项目的主要负责人，虽然小组成员只有 15 个，但硬生生地肩负起了每天超过 2000 万的 PV。</p><p>看，这样的简历是不是让人耳目一新，证明自己价值的同时，没有过多的粉饰，让招聘方觉得你很靠谱，迫切地想要把你这个人才“抢”到手，免费被别的公司挖走了。</p><p>简历上的内容不要太多，尽量不要超过一页，因为招聘方没有那么多时间去翻看你的简历。我是挺相信第一印象的，好的简历看一眼就会过目不忘，真的。</p><p>我是二哥呀，人生最可怕的事莫过于在别人放弃你之前，你先放弃了自己，我们下期再见。</p><blockquote><p>作者：阿秀，转载链接：<a href="https://mp.weixin.qq.com/s/soVldFzBbqwm_vM35afFvg" target="_blank" rel="noopener noreferrer">https://mp.weixin.qq.com/s/soVldFzBbqwm_vM35afFvg<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 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d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/-lQ2PTEO4F2d92GDDxKVpw" target="_blank" rel="noopener noreferrer">GitHub 上优质的 Java 知识总结项<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/_Q7lopxM1sJtMA-NOE_v3A" target="_blank" rel="noopener noreferrer">处于萌芽阶段的 Java 核心知识库<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://github.com/heibaiying/BigData-Notes" target="_blank" rel="noopener noreferrer">大数据入门指南 <span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="http://www.ruanyifeng.com/blog/2018/02/docker-tutorial.html" target="_blank" rel="noopener noreferrer">Docker 入门教程（阮一峰）<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul><h3 id="视频教程" tabindex="-1"><a class="header-anchor" href="#视频教程" aria-hidden="true">#</a> 视频教程</h3><ul><li><a href="/kaiyuan/yuneban-wangyiyunyinyue.html" class="">推荐 2 个 Java 练手项目（云E办、仿网易云音乐）</a></li><li><a href="https://mp.weixin.qq.com/s/QpT6jbTAxAoCr-YeiMmFNg" target="_blank" rel="noopener noreferrer">中国大学 mooc 国防科技大学计算机基础课<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/rRNYGNwuPdpSJHycP8J37g" target="_blank" rel="noopener noreferrer">B 站， YYDS！看了这些 Java视频，我直呼好家伙！！！<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/s3e21hF7jmq1lQP-0J1zXA" target="_blank" rel="noopener noreferrer">哈佛大学的 CS50<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/JF3CYYsaTAlLgHJoOSnTIQ" target="_blank" rel="noopener noreferrer">计算机科学速成课<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/Wgedf4ZH3_zJXxFxyPPyNQ" target="_blank" rel="noopener noreferrer">该死！B 站上这些 Java 视频真香！<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/xCHyjOokoiES6dOUWp-5mA" target="_blank" rel="noopener noreferrer">大学寒假在 B 站上应该刷的视频课<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul><h3 id="优质书单" tabindex="-1"><a class="header-anchor" href="#优质书单" aria-hidden="true">#</a> 优质书单</h3><ul><li><a href="https://mp.weixin.qq.com/s/alul8QAwtD82U37Oqa0N5Q" target="_blank" rel="noopener noreferrer">豆瓣 9.7！2022 值得一读的 15 本技术书籍！<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/DQPfguCIY4I3N8WnKGpVKg" target="_blank" rel="noopener noreferrer">开发内功修炼的2021年书单<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/vivwFEfvHzpaMl5rzf1GGw" target="_blank" rel="noopener noreferrer">数据库书单<span><svg 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fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/YTpBj5nNZdkuPahK9JuqXQ" target="_blank" rel="noopener noreferrer">新手小白，该怎么提高编程能力呢？<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul><h2 id="程序人生" tabindex="-1"><a class="header-anchor" href="#程序人生" aria-hidden="true">#</a> 程序人生</h2><blockquote><p>[!NOTE] <strong>程序员的人生不仅有代码，还有诗和远方</strong>。<br><br> 人间烟火味，最抚凡人心。</p></blockquote><h3 id="码农生活" tabindex="-1"><a class="header-anchor" href="#码农生活" aria-hidden="true">#</a> 码农生活</h3><ul><li><a href="https://mp.weixin.qq.com/s/KByt42RiDtt2aWpN4klmKg" target="_blank" rel="noopener noreferrer">中美程序员不完全对比<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/qHGdIuA32X-zydbMTKDPuA" target="_blank" rel="noopener noreferrer">降薪 45%，从互联网回到国企<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/08Ax1ArAjchemjUXih7zNw" target="_blank" rel="noopener noreferrer">学弟在微软的这六个月<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/mK0yaen1mhCoWZ6ZLC5vQg" target="_blank" rel="noopener noreferrer">找个程序员做老公/男票有多爽？？？<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="/manongshenghuo/yanjiusuo-20wan.html" class="">研究所月入两万，是什么体验？</a></li><li><a href="/manongshenghuo/waibao-1geyue.html" class="">裸辞全职做外包一个月的感受</a></li><li><a href="https://mp.weixin.qq.com/s/jG7DLrCFf_pYoMLFiVbaaA" target="_blank" rel="noopener noreferrer">转眼就来字节六个月了，真的不一样<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/ci5Meem_d3g2BphDmMP8VQ" target="_blank" rel="noopener noreferrer">在监狱里编程是一种什么体验（上）？<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/CTTlnXNXY9j3Bm3_4gmIbw" target="_blank" rel="noopener noreferrer">29 岁，非科班零基础，想兼职做外包。。<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon 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height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/DjSSzLQHBNOVyewEbLmhyw" target="_blank" rel="noopener noreferrer">996加班累到肺部切除，维权之路<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/cHqplnL2S-lI76HQE6QBvA" target="_blank" rel="noopener noreferrer">去上海申通实习了，有点迷茫。。<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/HhFzoDR4oSOf0idlCjtApw" target="_blank" rel="noopener noreferrer">一个月薪 12000 的北京程序员的真实生活<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/XG1k39oZ0p1tT1Y4qVmXfQ" target="_blank" rel="noopener noreferrer">进腾讯了！<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 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aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/KRaSFlMTYV_3GoCv4aDRWA" target="_blank" rel="noopener noreferrer">打算在县城“买”片地<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/qR_MmaKfVHERuAz987MzyA" target="_blank" rel="noopener noreferrer">曝下 955 加班少的公司名单！<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/kZ7simp8xSniK-E-AmVJCw" target="_blank" rel="noopener noreferrer">我身边的 3 个女神<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/CDXyVL39aIQuvD4jssObTw" target="_blank" rel="noopener noreferrer">住过窑洞的人<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul><h3 id="人生建议" tabindex="-1"><a class="header-anchor" href="#人生建议" aria-hidden="true">#</a> 人生建议</h3><ul><li><a href="https://mp.weixin.qq.com/s/uY7tSA3ieSBe0IRjR9Ighg" target="_blank" rel="noopener noreferrer">准备考研还是准备工作？<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/XAnWkOzO_PHIgyFrnlejbg" target="_blank" rel="noopener noreferrer">自己能力不足，想要辞职，该怎么办？<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/oc-6Um6y0LlpSQwDY4HAbw" target="_blank" rel="noopener noreferrer">美团还是研究所，美团年包多二十万，怎么选？<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/q6EEokBPLjf00ELHpusJlA" target="_blank" rel="noopener noreferrer">被毁约了，该怎么办？<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/iAdAlISvLXgxkrYih3zB3Q" target="_blank" rel="noopener noreferrer">离开学校后，我才明白的这些道理<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/2mMH7lp9g_u40Gh7E0S7mQ" target="_blank" rel="noopener noreferrer">假如哪天失业了该怎么办？<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/Xe06SHupUwfQn-hyBv9s0Q" target="_blank" rel="noopener noreferrer">害怕三四年以后读研出来计算机不行了<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span 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100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/72Mzt2a9pd3HBddaIQvM9g" target="_blank" rel="noopener noreferrer">要不要去日企？<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span 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100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/1uZA16fXy7YXivi210vcLw" target="_blank" rel="noopener noreferrer">计算机大类到底该选择哪个学科呢？<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/EOm5qhR4bKF7idBvp4Q7zQ" target="_blank" rel="noopener noreferrer">银行科技岗，真香吗？<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/pDFA5XVKYTte5Jlw6j4Z-g" target="_blank" rel="noopener noreferrer">该填志愿了，国内大学计算机专业哪家强？<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/A7fD8Y0wDvg9byJRF2rg9Q" target="_blank" rel="noopener noreferrer">如何优雅地向公司提加薪?<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul><h2 id="数据结构" tabindex="-1"><a class="header-anchor" href="#数据结构" aria-hidden="true">#</a> 数据结构</h2><ul><li><a href="https://mp.weixin.qq.com/s/fc48Z5tSMlBHweYIS1UL0g" target="_blank" rel="noopener noreferrer">栈<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/TCg9_3cVuDfZLqK2eYrc7w" target="_blank" rel="noopener noreferrer">队列<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/BbDQPEPY6Etp9F8gQSBchw" target="_blank" rel="noopener noreferrer">霍夫曼编码<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul><h2 id="其他杂文" tabindex="-1"><a class="header-anchor" href="#其他杂文" aria-hidden="true">#</a> 其他杂文</h2><ul><li><a href="https://mp.weixin.qq.com/s/MBIahGdnyKJ1KNeUFFqgdQ" target="_blank" rel="noopener noreferrer">B站视频被抄袭了！附 2022 年目标<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/CJ6JzqU3N4l9pJbrQ_HB-w" target="_blank" rel="noopener noreferrer">入坑 docsify，一款神奇的文档生成利器！<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/eKJIxcwOdykHza4AMRoiTw" target="_blank" rel="noopener noreferrer">想去读个研究生了<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/XdQwOoyhRZnXt7XL6toqDg" target="_blank" rel="noopener noreferrer">逆袭！<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/hA1dnbjd7o1t1jWVGDX8tg" target="_blank" rel="noopener noreferrer">我坚持三年了<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/LMm3zzA8XbbeJIfAn0D-QQ" target="_blank" rel="noopener noreferrer">坚持了半年，值了！<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul><h2 id="技术文" tabindex="-1"><a class="header-anchor" href="#技术文" aria-hidden="true">#</a> 技术文</h2><ul><li><a href="/thread/ali-executors.html" class="">为什么阿里巴巴要禁用Executors创建线程池？</a></li><li><a href="https://mp.weixin.qq.com/s/047_V8QVNewxsYVykNqwAQ" target="_blank" rel="noopener noreferrer">10 张图告诉你多线程那些破事<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/gHUyuljaT8ESOjeMfV1fnQ" target="_blank" rel="noopener noreferrer">我是一个线程池（细节修订版）<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/e61PCzlIUe0YJcQsCG9FYw" target="_blank" rel="noopener noreferrer">我是一个线程池（续）<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/zxlLWxNsyIJMh4NDeGZBAg" target="_blank" rel="noopener noreferrer">我是一个线程(全新修订版)<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/eo-IKT_d6IT-8b2CXCidPw" target="_blank" rel="noopener noreferrer">为什么 Java 线程没有 Running 状态？<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/qoWlR4ohVMfZf8IlhdSQDQ" target="_blank" rel="noopener noreferrer">Spring事务失效的12个场景<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/9R3U4-Uzg3eaXJS20izS9A" target="_blank" rel="noopener noreferrer">在 Spring Boot 中使用 HikariCP 连接池<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" 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width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/dO1dYAHwyB-81L1z3D_sdg" target="_blank" rel="noopener noreferrer">Logback这样配置，性能提升10倍！<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="/springboot/oss.html" class="">崩溃！我带的实习生竟然把图片直接存到了服务器上！</a></li><li><a href="https://mp.weixin.qq.com/s/zBfvjq3gry2zsMoMir6oZA" target="_blank" rel="noopener noreferrer">看见 Java<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/mDnDjTWereF_ekLG1NNHRQ" target="_blank" rel="noopener noreferrer">临时抱佛脚，线上问题如何排查？<span><svg 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fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="/jvm/meituan-9-gc.html" class="">Java中9种常见的CMS GC问题分析与解决</a></li></ul><h2 id="前端" tabindex="-1"><a class="header-anchor" href="#前端" aria-hidden="true">#</a> 前端</h2><ul><li><a href="https://mp.weixin.qq.com/s/BrYyhCyQwBEZOwgJZeaTOw" target="_blank" rel="noopener noreferrer">前端最努力的同学都是如何学习的？<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/sos0tc_pTptzQimBNSS-vg" target="_blank" rel="noopener noreferrer">前端学习资料<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul><h2 id="问题解析" tabindex="-1"><a class="header-anchor" href="#问题解析" aria-hidden="true">#</a> 问题解析</h2><blockquote><p>[!TIP] 开发过程中遇到的一些典型问题，该如何解决？</p></blockquote><ul><li><a href="/shigu/log4j2.html" class="">Log4j2突发重大漏洞</a></li><li><a href="https://mp.weixin.qq.com/s/zXzJVxRxMUnoyJs6_NojMQ" target="_blank" rel="noopener noreferrer">重现了一波 Log4j2 核弹级漏洞，同事的电脑沦为炮灰<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/J6jb_Dt3C49CIjYBTrN4gQ" target="_blank" rel="noopener noreferrer">生成订单30分钟未支付，则自动取消，该怎么实现？<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="/shigu/image-yasuo.html" class="">两天两夜，1M图片优化到100kb！</a></li><li><a href="https://mp.weixin.qq.com/s/lvyoN1gHCWhcPqudcjcRgQ" target="_blank" rel="noopener noreferrer">内部群炸了锅，隔壁同事真删库了啊。。<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/PfJe5rXednkXTq8EKT0xpw" target="_blank" rel="noopener noreferrer">B 站崩了<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/ec6u8WsPt7zJ0eul8sPEhg" target="_blank" rel="noopener noreferrer">因为一个低级错误，生产数据库崩溃了将近半个小时<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/n9AFMwQB9V_fq_sED1EWvg" target="_blank" rel="noopener noreferrer">防止重复提交最简单的方案是什么？<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul><h2 id="代码优化" tabindex="-1"><a class="header-anchor" href="#代码优化" aria-hidden="true">#</a> 代码优化</h2><ul><li><a href="https://mp.weixin.qq.com/s/ikfgfHunmlwR-43rd8LknQ" target="_blank" rel="noopener noreferrer">49 个代码优化小技巧<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/9EOTzZ2Qx3u8oTyghkVUEg" target="_blank" rel="noopener noreferrer">不要用“ ! = null ”做判空了！<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul><h2 id="性能调优" tabindex="-1"><a class="header-anchor" href="#性能调优" aria-hidden="true">#</a> 性能调优</h2><ul><li><a href="https://mp.weixin.qq.com/s/vEt_ypvByKS-oCsuRmpgUw" target="_blank" rel="noopener noreferrer">性能调优标准<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul><h2 id="mysql重要知识点" tabindex="-1"><a class="header-anchor" href="#mysql重要知识点" aria-hidden="true">#</a> MySQL重要知识点</h2><ul><li><a href="/mysql/deletedb-binlog-weiguanjishu.html" class="">从京东到家程序员删库被判 10 个月来聊聊 MySQL 数据备份的杀手锏</a></li><li><a href="https://tech.youzan.com/shen-ru-qian-chu-mysql-crash-safe/" target="_blank" rel="noopener noreferrer">深入浅出MySQL crash safe<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" 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aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/-2ZlvHfeh7gKVylrKpJyYQ" target="_blank" rel="noopener noreferrer">一键部署 K8S 环境，10分钟玩转，这款开源神器实在太香了！<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 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d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/p4r9hPHnNTK5EKcWIAL8Vw" target="_blank" rel="noopener noreferrer">官方标配！吊炸天的 Linux 可视化管理工具，必须推荐给你！<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span 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x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/IiFYud-wAFqjuZCyrD-ozA" target="_blank" rel="noopener noreferrer">再见 Feign！推荐一款微服务间调用神器，跟 SpringCloud 绝配！<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 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d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/lOif5gesMUzL0zdOSkZ0fg" target="_blank" rel="noopener noreferrer">还在用HttpUtil？试试这款优雅的HTTP客户端工具吧，跟SpringBoot绝配！<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span 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viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/xCHyjOokoiES6dOUWp-5mA" target="_blank" rel="noopener noreferrer">大学寒假在 B 站上应该刷的视频课<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul><h3 id="优质书单" tabindex="-1"><a class="header-anchor" href="#优质书单" aria-hidden="true">#</a> 优质书单</h3><ul><li><a href="https://mp.weixin.qq.com/s/alul8QAwtD82U37Oqa0N5Q" target="_blank" rel="noopener noreferrer">豆瓣 9.7！2022 值得一读的 15 本技术书籍！<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/DQPfguCIY4I3N8WnKGpVKg" target="_blank" rel="noopener 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noreferrer">母亲节快乐！<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/U44Js0_KQbv_9osV75lOuA" target="_blank" rel="noopener noreferrer">大学同学考研成功了！<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/KRaSFlMTYV_3GoCv4aDRWA" target="_blank" rel="noopener noreferrer">打算在县城“买”片地<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/qR_MmaKfVHERuAz987MzyA" target="_blank" rel="noopener noreferrer">曝下 955 加班少的公司名单！<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/kZ7simp8xSniK-E-AmVJCw" target="_blank" rel="noopener noreferrer">我身边的 3 个女神<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/CDXyVL39aIQuvD4jssObTw" target="_blank" rel="noopener noreferrer">住过窑洞的人<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul><h3 id="人生建议" tabindex="-1"><a class="header-anchor" href="#人生建议" aria-hidden="true">#</a> 人生建议</h3><ul><li><a href="https://mp.weixin.qq.com/s/uY7tSA3ieSBe0IRjR9Ighg" target="_blank" rel="noopener noreferrer">准备考研还是准备工作？<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/XAnWkOzO_PHIgyFrnlejbg" target="_blank" rel="noopener noreferrer">自己能力不足，想要辞职，该怎么办？<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/oc-6Um6y0LlpSQwDY4HAbw" target="_blank" rel="noopener noreferrer">美团还是研究所，美团年包多二十万，怎么选？<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/q6EEokBPLjf00ELHpusJlA" target="_blank" rel="noopener noreferrer">被毁约了，该怎么办？<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/iAdAlISvLXgxkrYih3zB3Q" target="_blank" rel="noopener noreferrer">离开学校后，我才明白的这些道理<span><svg 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d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/72Mzt2a9pd3HBddaIQvM9g" target="_blank" rel="noopener noreferrer">要不要去日企？<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/pspf-XKOgSWkoIKgpv9VEA" target="_blank" rel="noopener noreferrer">上大专有用吗？<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/vavycrOfjtsvA_ARaWsxSg" target="_blank" rel="noopener noreferrer">高考该如何填报志愿？<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/1uZA16fXy7YXivi210vcLw" target="_blank" rel="noopener noreferrer">计算机大类到底该选择哪个学科呢？<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/EOm5qhR4bKF7idBvp4Q7zQ" target="_blank" rel="noopener noreferrer">银行科技岗，真香吗？<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/pDFA5XVKYTte5Jlw6j4Z-g" target="_blank" rel="noopener noreferrer">该填志愿了，国内大学计算机专业哪家强？<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/A7fD8Y0wDvg9byJRF2rg9Q" target="_blank" rel="noopener noreferrer">如何优雅地向公司提加薪?<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul><h2 id="数据结构" tabindex="-1"><a class="header-anchor" href="#数据结构" aria-hidden="true">#</a> 数据结构</h2><ul><li><a href="https://mp.weixin.qq.com/s/fc48Z5tSMlBHweYIS1UL0g" target="_blank" rel="noopener noreferrer">栈<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/TCg9_3cVuDfZLqK2eYrc7w" target="_blank" rel="noopener noreferrer">队列<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/BbDQPEPY6Etp9F8gQSBchw" target="_blank" rel="noopener noreferrer">霍夫曼编码<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul><h2 id="其他杂文" tabindex="-1"><a class="header-anchor" href="#其他杂文" aria-hidden="true">#</a> 其他杂文</h2><ul><li><a href="https://mp.weixin.qq.com/s/MBIahGdnyKJ1KNeUFFqgdQ" target="_blank" rel="noopener noreferrer">B站视频被抄袭了！附 2022 年目标<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/CJ6JzqU3N4l9pJbrQ_HB-w" target="_blank" rel="noopener noreferrer">入坑 docsify，一款神奇的文档生成利器！<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/eKJIxcwOdykHza4AMRoiTw" target="_blank" rel="noopener noreferrer">想去读个研究生了<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/XdQwOoyhRZnXt7XL6toqDg" target="_blank" rel="noopener noreferrer">逆袭！<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/hA1dnbjd7o1t1jWVGDX8tg" target="_blank" rel="noopener noreferrer">我坚持三年了<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/LMm3zzA8XbbeJIfAn0D-QQ" target="_blank" rel="noopener noreferrer">坚持了半年，值了！<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul><h2 id="技术文" tabindex="-1"><a class="header-anchor" href="#技术文" aria-hidden="true">#</a> 技术文</h2><ul><li><a href="/thread/ali-executors.html" class="">为什么阿里巴巴要禁用Executors创建线程池？</a></li><li><a href="https://mp.weixin.qq.com/s/047_V8QVNewxsYVykNqwAQ" target="_blank" rel="noopener noreferrer">10 张图告诉你多线程那些破事<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/gHUyuljaT8ESOjeMfV1fnQ" target="_blank" rel="noopener noreferrer">我是一个线程池（细节修订版）<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/e61PCzlIUe0YJcQsCG9FYw" target="_blank" rel="noopener noreferrer">我是一个线程池（续）<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/zxlLWxNsyIJMh4NDeGZBAg" target="_blank" rel="noopener noreferrer">我是一个线程(全新修订版)<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/eo-IKT_d6IT-8b2CXCidPw" target="_blank" rel="noopener noreferrer">为什么 Java 线程没有 Running 状态？<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/qoWlR4ohVMfZf8IlhdSQDQ" target="_blank" rel="noopener noreferrer">Spring事务失效的12个场景<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/9R3U4-Uzg3eaXJS20izS9A" target="_blank" rel="noopener noreferrer">在 Spring Boot 中使用 HikariCP 连接池<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" 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points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="/jvm/meituan-9-gc.html" class="">Java中9种常见的CMS GC问题分析与解决</a></li></ul><h2 id="前端" tabindex="-1"><a class="header-anchor" href="#前端" aria-hidden="true">#</a> 前端</h2><ul><li><a href="https://mp.weixin.qq.com/s/BrYyhCyQwBEZOwgJZeaTOw" target="_blank" rel="noopener noreferrer">前端最努力的同学都是如何学习的？<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/sos0tc_pTptzQimBNSS-vg" target="_blank" rel="noopener noreferrer">前端学习资料<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul><h2 id="问题解析" tabindex="-1"><a class="header-anchor" href="#问题解析" aria-hidden="true">#</a> 问题解析</h2><blockquote><p>[!TIP] 开发过程中遇到的一些典型问题，该如何解决？</p></blockquote><ul><li><a href="/shigu/log4j2.html" class="">Log4j2突发重大漏洞</a></li><li><a href="https://mp.weixin.qq.com/s/zXzJVxRxMUnoyJs6_NojMQ" target="_blank" rel="noopener noreferrer">重现了一波 Log4j2 核弹级漏洞，同事的电脑沦为炮灰<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/J6jb_Dt3C49CIjYBTrN4gQ" target="_blank" rel="noopener noreferrer">生成订单30分钟未支付，则自动取消，该怎么实现？<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="/shigu/image-yasuo.html" class="">两天两夜，1M图片优化到100kb！</a></li><li><a href="https://mp.weixin.qq.com/s/lvyoN1gHCWhcPqudcjcRgQ" target="_blank" rel="noopener noreferrer">内部群炸了锅，隔壁同事真删库了啊。。<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/PfJe5rXednkXTq8EKT0xpw" target="_blank" rel="noopener noreferrer">B 站崩了<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/ec6u8WsPt7zJ0eul8sPEhg" target="_blank" rel="noopener noreferrer">因为一个低级错误，生产数据库崩溃了将近半个小时<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/n9AFMwQB9V_fq_sED1EWvg" target="_blank" rel="noopener noreferrer">防止重复提交最简单的方案是什么？<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul><h2 id="代码优化" tabindex="-1"><a class="header-anchor" href="#代码优化" aria-hidden="true">#</a> 代码优化</h2><ul><li><a href="https://mp.weixin.qq.com/s/ikfgfHunmlwR-43rd8LknQ" target="_blank" rel="noopener noreferrer">49 个代码优化小技巧<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/9EOTzZ2Qx3u8oTyghkVUEg" target="_blank" rel="noopener noreferrer">不要用“ ! = null ”做判空了！<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul><h2 id="性能调优" tabindex="-1"><a class="header-anchor" href="#性能调优" aria-hidden="true">#</a> 性能调优</h2><ul><li><a href="https://mp.weixin.qq.com/s/vEt_ypvByKS-oCsuRmpgUw" target="_blank" rel="noopener noreferrer">性能调优标准<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul><h2 id="mysql重要知识点" tabindex="-1"><a class="header-anchor" href="#mysql重要知识点" aria-hidden="true">#</a> MySQL重要知识点</h2><ul><li><a href="/mysql/deletedb-binlog-weiguanjishu.html" class="">从京东到家程序员删库被判 10 个月来聊聊 MySQL 数据备份的杀手锏</a></li><li><a href="https://tech.youzan.com/shen-ru-qian-chu-mysql-crash-safe/" target="_blank" rel="noopener noreferrer">深入浅出MySQL crash safe<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" 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aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/-2ZlvHfeh7gKVylrKpJyYQ" target="_blank" rel="noopener noreferrer">一键部署 K8S 环境，10分钟玩转，这款开源神器实在太香了！<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 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d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/p4r9hPHnNTK5EKcWIAL8Vw" target="_blank" rel="noopener noreferrer">官方标配！吊炸天的 Linux 可视化管理工具，必须推荐给你！<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span 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x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/IiFYud-wAFqjuZCyrD-ozA" target="_blank" rel="noopener noreferrer">再见 Feign！推荐一款微服务间调用神器，跟 SpringCloud 绝配！<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 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d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/lOif5gesMUzL0zdOSkZ0fg" target="_blank" rel="noopener noreferrer">还在用HttpUtil？试试这款优雅的HTTP客户端工具吧，跟SpringBoot绝配！<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span 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class="page-title"><h1><!---->豆瓣9.1分，Pro Git中文版</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月18日</span><meta property="datePublished" content="2022-03-18T02:19:22.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category2" role>学习资源</li><meta property="articleSection" content="学习资源"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag2" role>PDF</li></ul><meta property="keywords" content="PDF"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 2 分钟</span><meta property="timeRequired" content="PT2M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><p>今天给大家分享一本个人最近看过觉得非常不错的Git开源手册，可能有些小伙伴也看过了，我是最近在通勤路上用PAD看的。这本开源手册，它除了有<strong>PDF版</strong>，还有<strong>epub电子书版</strong>，非常适合电子阅读：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/download/progit-41240dae-f097-4986-b1a3-20f6a8035732.jpg" alt=""></p><p>需要的小伙伴请扫描下方的二维码关注作者的原创公众号「<strong>沉默王二</strong>」回复关键字「<strong>git</strong>」就可以拉取到下载链接了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongzhonghao.png" alt="扫码关注后回复「git」关键字"></p><p>相信看完对于个人Git知识体系的梳理和掌握是非常有帮助的。</p><p>这本手册在豆瓣上评价极高，之前9.3，现在也有9.1的高分，其作者是GitHub的员工，内容主要侧重于各种场合中的惯用法和底层原理的讲述，手册中还针对不同的使用场景，设计了几个合适的版本管理策略。简而言之，这本手册无论是对于初学者还是想进一步了解Git工作原理的开发者都非常合适。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/download/progit-66757d24-4bcb-4084-9e7f-8e9e32d517c4.jpg" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/download/progit-b829ef9a-3c8f-4e91-b88b-3eeb1692d8d9.jpg" alt=""></p><p>这个手册一共分为十章，详细内容如下：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/download/progit-33b772d5-fa59-4181-8831-9efe9c1b11ea.jpg" alt=""></p><p><strong>手册中部分内容展示如下：</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/download/progit-f8c62f18-ceaa-4de1-b7ad-961cd1418bfb.jpg" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/download/progit-d82932c6-5a30-4ed6-86e5-e4ca468e8a13.jpg" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/download/progit-ca7c7781-7c3f-4729-9cd7-2c050b660e4e.jpg" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/download/progit-91c726c1-a10d-41fb-8b2a-a5228d741106.jpg" alt=""></p><p><strong>需要该Git手册PDF+epub电子书的小伙伴：</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/download/progit-eff913ad-4635-498f-8a04-01a03380e84a.jpg" alt=""></p><p>可扫描下方的二维码关注作者的原创公众号「<strong>沉默王二</strong>」回复关键字「<strong>git</strong>」就可以拉取到下载链接了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongzhonghao.png" alt="扫码关注后回复「git」关键字"></p><p>好了，这次资源分享就到这里！后续如果遇到有用的工具或者资源，依然还会持续分享，也欢迎大家多多安利和交流，一起分享成长。</p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/download/progit.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg 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0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月18日</span><meta property="datePublished" content="2022-03-18T02:19:22.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category2" role>学习资源</li><meta property="articleSection" content="学习资源"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag2" role>PDF</li></ul><meta property="keywords" content="PDF"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 2 分钟</span><meta property="timeRequired" content="PT2M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><p>今天给大家分享一本个人最近看过觉得非常不错的Git开源手册，可能有些小伙伴也看过了，我是最近在通勤路上用PAD看的。这本开源手册，它除了有<strong>PDF版</strong>，还有<strong>epub电子书版</strong>，非常适合电子阅读：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/download/progit-41240dae-f097-4986-b1a3-20f6a8035732.jpg" alt=""></p><p>需要的小伙伴请扫描下方的二维码关注作者的原创公众号「<strong>沉默王二</strong>」回复关键字「<strong>git</strong>」就可以拉取到下载链接了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongzhonghao.png" alt="扫码关注后回复「git」关键字"></p><p>相信看完对于个人Git知识体系的梳理和掌握是非常有帮助的。</p><p>这本手册在豆瓣上评价极高，之前9.3，现在也有9.1的高分，其作者是GitHub的员工，内容主要侧重于各种场合中的惯用法和底层原理的讲述，手册中还针对不同的使用场景，设计了几个合适的版本管理策略。简而言之，这本手册无论是对于初学者还是想进一步了解Git工作原理的开发者都非常合适。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/download/progit-66757d24-4bcb-4084-9e7f-8e9e32d517c4.jpg" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/download/progit-b829ef9a-3c8f-4e91-b88b-3eeb1692d8d9.jpg" alt=""></p><p>这个手册一共分为十章，详细内容如下：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/download/progit-33b772d5-fa59-4181-8831-9efe9c1b11ea.jpg" alt=""></p><p><strong>手册中部分内容展示如下：</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/download/progit-f8c62f18-ceaa-4de1-b7ad-961cd1418bfb.jpg" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/download/progit-d82932c6-5a30-4ed6-86e5-e4ca468e8a13.jpg" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/download/progit-ca7c7781-7c3f-4729-9cd7-2c050b660e4e.jpg" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/download/progit-91c726c1-a10d-41fb-8b2a-a5228d741106.jpg" alt=""></p><p><strong>需要该Git手册PDF+epub电子书的小伙伴：</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/download/progit-eff913ad-4635-498f-8a04-01a03380e84a.jpg" alt=""></p><p>可扫描下方的二维码关注作者的原创公众号「<strong>沉默王二</strong>」回复关键字「<strong>git</strong>」就可以拉取到下载链接了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongzhonghao.png" alt="扫码关注后回复「git」关键字"></p><p>好了，这次资源分享就到这里！后续如果遇到有用的工具或者资源，依然还会持续分享，也欢迎大家多多安利和交流，一起分享成长。</p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/download/progit.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 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class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><!----><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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class="page-title"><h1><!---->阮一峰-C语言入门教程</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月18日</span><meta property="datePublished" content="2022-03-18T02:19:22.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" 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18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category2" role>学习资源</li><meta property="articleSection" content="学习资源"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag2" role>PDF</li></ul><meta property="keywords" content="PDF"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 5 分钟</span><meta property="timeRequired" content="PT5M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><p>给大家报告下，阮一峰老师的《<strong>C语言入门教程</strong>》于 2021 年 9 月 7 日上线了！</p><p>对，和往常一样，这个教程是开源的，采用知识共享许可证，源码托管在 GitHub，大家可以自由使用。</p><blockquote><p>https://github.com/wangdoc/clang-tutorial</p></blockquote><p>在线阅读地址也有：</p><blockquote><p>https://wangdoc.com/clang/</p></blockquote><p>我第一时间就拜读了一遍，受益匪浅！可以说目前我见到的最好的 C语言入门教程了，没有之一！</p><p>要知道，国内的绝大多数高校，大一都会安排 C 语言这门课，教材通常会选择谭浩强的C语言程序设计，但这本书在网上的风评极差。</p><p>而阮一峰老师的作品，想必大家都有所耳闻，硬核的同时，又通俗易懂，深受广大读者的喜欢。</p><p>福音啊！我要狂吹阮一峰了老师的这份《<strong>C语言入门教程</strong>》。</p><p>考虑到很多小伙伴喜欢 PDF 版的，我就立马给准备了！</p><p>需要的小伙伴请扫描下方的二维码关注作者的原创公众号「<strong>沉默王二</strong>」回复关键字「<strong>08</strong>」就可以拉取到下载链接了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongzhonghao.png" alt="扫码关注后回复「08」关键字"></p><p>也可以微信搜「<strong>沉默王二</strong>」关注后回复关键字「<strong>08</strong>」。</p><p>之前给大家推荐的学习 C语言的视频教程有浙大翁恺教授的《C语言程序设计》，在 B 站上和中国大学慕课网上都可以看得到。</p><p>那配上阮一峰老师的这个在线文档教程，可以说是完美！</p><p><img src="https://files.mdnice.com/user/3903/96b19f0e-4721-4b86-b69b-3eeb78ac3410.png" alt=""></p><p>我对这份教程是非常满意的，该讲的地方都讲到了，示例也给了很多，对初学者来说，完全够用了。</p><p>阮一峰老师在写这份《C语言入门教程》的时候还是花费了很多心思的，因为 C 代码的写法实在是太自由了，而平常工作中又确实很少有机会写 C 代码，所以前前后后花了 6 个多月的时间。</p><p>C语言最初是作为 Unix 系统的开发工具而发明的。1972年，丹尼斯·里奇和布莱恩·柯林汉在 B 语言的基础上重新设计了一门新语言，这种新语言取代了 B 语言，所以称为 C 语言。</p><p>1973年，整个 Unix 系统都使用了 C 语言重写。此后，C 语言开始快速流传，广泛用于各种操作系统和系统软件的开发。</p><p>除了用于计算机操作系统的编写，C语言现在主要用于嵌入式系统的开发，骑车、照相机、家用电器等设备的底层系统都是用 C 语言编程的。</p><p>C语言能够直接操作硬件、管理内存、跟操作系统交互，这使得它成为了一种非常接近底层的编程语言，非常适合有极高性能要求的程序。</p><p>C语言对程序员的限制很少，它假设程序员知道自己在干嘛，不会限制程序员做各种骚操作，想干嘛就干嘛，反正后果自负，哈哈哈。</p><p>C语言的哲学就是“极度相信程序员，不妨碍他们做事”，所以，C语言让程序员自己管理内存，没有垃圾回收功能，也不提供类型检查、数组下标范围检查、指针位置检查等防御措施。</p><p>表面上看，这似乎很危险，但对于有一定水平的程序员来说，简直就是福音，大胆去编程，解放生产效率就对了。</p><p>另外一方面，C语言的 debug 不是很容易，写代码的时候必须要富有缜密的逻辑性，一旦出错，是很难找补的。</p><p>C语言在武林界的地位就相当于少林的地位，天下武功皆出少林，很多流行的编程语言都是以 C语言为基础的，比如说C++、Java、C#、JavaScript 等等，有了 C语言的基础，再学习这些语言都会有很大帮助。</p><p>经过多年的发展，C语言有蛮多版本的，1999 年 C99 是目前最流行的 C 版本。</p><p>常见的 C 语言编译器是自由软件基金会推出的 GCC 编译器，它可以免费使用。Linux 和 Mac 系统可以直接安装 GCC，Windows 系统可以安装 MinGW。</p><p>不过网上也有蛮多在线编译器的，可以直接在网页上模拟运行 C 代码，查看结果，非常方便。</p><p><img src="https://files.mdnice.com/user/3903/e565681d-ee91-4be3-bb1a-bee34f0e87a6.png" alt=""></p><blockquote><p>CodingGround网址：https://www.tutorialspoint.com/compile_c_online.php</p></blockquote><p>C 语言是一种编译型语言，源码是文本文件，本身是无法执行的，需要通过编译器，生成二进制的可执行文件。</p><p>编译器将代码从文本翻译成二进制指令的过程，被称为编译阶段，又称为“编译时”（compile time），跟运行阶段（又称为“运行时”）相区分。</p><p>C语言中，指针是令初学者头痛的一块内容，所以我这里简单给大家聊两句。</p><p><strong>指针是什么？它是一个值，这个值代表一个内存地址，因此，指针就相当于指向某个内存地址的路标</strong>。</p><p>字符*表示指针，通常跟在类型关键字的后面，表示指针指向的是什么类型的值。比如，<code>char*</code>表示一个指向字符的指针，<code>float*</code>表示一个指向float类型的值的指针。</p><p>*这个符号除了表示指针以外，还可以作为运算符，用来取出指针变量所指向的内存地址里面的值。</p><p>而&amp;运算符用来取出一个变量所在的内存地址。</p><p>背会理解了这几句，可以说指针的理论基础就有了。跨过去指针这一关，C 语言最硬核的部分也就掌握了。</p><blockquote><p>需要阮一峰老师的这份《C语言入门教程》的小伙伴请扫描下方的二维码关注作者的原创公众号「<strong>沉默王二</strong>」回复关键字「<strong>08</strong>」就可以拉取到下载链接了。</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongzhonghao.png" alt="扫码关注后回复「08」关键字"></p><p>也可以微信搜「<strong>沉默王二</strong>」关注后回复关键字「<strong>08</strong>」。</p><p>OK，今天就简单聊到这里，希望阮一峰老师的这份教程能帮助到大家。我们下期见~</p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/download/yuanyifeng-c-language.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" 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sidebar-link sidebar-page" aria-label="学习建议"><!---->学习建议<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/download/nicearticle.html" class="nav-link sidebar-link sidebar-page" aria-label="优质文章精选集"><!---->优质文章精选集<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/download/history.html" class="nav-link sidebar-link sidebar-page" aria-label="网络日志"><!---->网络日志<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->👏下载→阮一峰C语言入门教程</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 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class="theme-hope-content"><p>给大家报告下，阮一峰老师的《<strong>C语言入门教程</strong>》于 2021 年 9 月 7 日上线了！</p><p>对，和往常一样，这个教程是开源的，采用知识共享许可证，源码托管在 GitHub，大家可以自由使用。</p><blockquote><p><a href="https://github.com/wangdoc/clang-tutorial" target="_blank" rel="noopener noreferrer">https://github.com/wangdoc/clang-tutorial<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>在线阅读地址也有：</p><blockquote><p><a href="https://wangdoc.com/clang/" target="_blank" rel="noopener noreferrer">https://wangdoc.com/clang/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>我第一时间就拜读了一遍，受益匪浅！可以说目前我见到的最好的 C语言入门教程了，没有之一！</p><p>要知道，国内的绝大多数高校，大一都会安排 C 语言这门课，教材通常会选择谭浩强的C语言程序设计，但这本书在网上的风评极差。</p><p>而阮一峰老师的作品，想必大家都有所耳闻，硬核的同时，又通俗易懂，深受广大读者的喜欢。</p><p>福音啊！我要狂吹阮一峰了老师的这份《<strong>C语言入门教程</strong>》。</p><p>考虑到很多小伙伴喜欢 PDF 版的，我就立马给准备了！</p><p>需要的小伙伴请扫描下方的二维码关注作者的原创公众号「<strong>沉默王二</strong>」回复关键字「<strong>08</strong>」就可以拉取到下载链接了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongzhonghao.png" alt="扫码关注后回复「08」关键字"></p><p>也可以微信搜「<strong>沉默王二</strong>」关注后回复关键字「<strong>08</strong>」。</p><p>之前给大家推荐的学习 C语言的视频教程有浙大翁恺教授的《C语言程序设计》，在 B 站上和中国大学慕课网上都可以看得到。</p><p>那配上阮一峰老师的这个在线文档教程，可以说是完美！</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/download/yuanyifeng-c-language-4a28a9bd-0db4-419c-8aaf-fa102323282d.png" alt=""></p><p>我对这份教程是非常满意的，该讲的地方都讲到了，示例也给了很多，对初学者来说，完全够用了。</p><p>阮一峰老师在写这份《C语言入门教程》的时候还是花费了很多心思的，因为 C 代码的写法实在是太自由了，而平常工作中又确实很少有机会写 C 代码，所以前前后后花了 6 个多月的时间。</p><p>C语言最初是作为 Unix 系统的开发工具而发明的。1972年，丹尼斯·里奇和布莱恩·柯林汉在 B 语言的基础上重新设计了一门新语言，这种新语言取代了 B 语言，所以称为 C 语言。</p><p>1973年，整个 Unix 系统都使用了 C 语言重写。此后，C 语言开始快速流传，广泛用于各种操作系统和系统软件的开发。</p><p>除了用于计算机操作系统的编写，C语言现在主要用于嵌入式系统的开发，骑车、照相机、家用电器等设备的底层系统都是用 C 语言编程的。</p><p>C语言能够直接操作硬件、管理内存、跟操作系统交互，这使得它成为了一种非常接近底层的编程语言，非常适合有极高性能要求的程序。</p><p>C语言对程序员的限制很少，它假设程序员知道自己在干嘛，不会限制程序员做各种骚操作，想干嘛就干嘛，反正后果自负，哈哈哈。</p><p>C语言的哲学就是“极度相信程序员，不妨碍他们做事”，所以，C语言让程序员自己管理内存，没有垃圾回收功能，也不提供类型检查、数组下标范围检查、指针位置检查等防御措施。</p><p>表面上看，这似乎很危险，但对于有一定水平的程序员来说，简直就是福音，大胆去编程，解放生产效率就对了。</p><p>另外一方面，C语言的 debug 不是很容易，写代码的时候必须要富有缜密的逻辑性，一旦出错，是很难找补的。</p><p>C语言在武林界的地位就相当于少林的地位，天下武功皆出少林，很多流行的编程语言都是以 C语言为基础的，比如说C++、Java、C#、JavaScript 等等，有了 C语言的基础，再学习这些语言都会有很大帮助。</p><p>经过多年的发展，C语言有蛮多版本的，1999 年 C99 是目前最流行的 C 版本。</p><p>常见的 C 语言编译器是自由软件基金会推出的 GCC 编译器，它可以免费使用。Linux 和 Mac 系统可以直接安装 GCC，Windows 系统可以安装 MinGW。</p><p>不过网上也有蛮多在线编译器的，可以直接在网页上模拟运行 C 代码，查看结果，非常方便。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/download/yuanyifeng-c-language-4dfd8f91-893f-401f-81ad-488e08934c07.png" alt=""></p><blockquote><p>CodingGround网址：<a href="https://www.tutorialspoint.com/compile_c_online.php" target="_blank" rel="noopener noreferrer">https://www.tutorialspoint.com/compile_c_online.php<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>C 语言是一种编译型语言，源码是文本文件，本身是无法执行的，需要通过编译器，生成二进制的可执行文件。</p><p>编译器将代码从文本翻译成二进制指令的过程，被称为编译阶段，又称为“编译时”（compile time），跟运行阶段（又称为“运行时”）相区分。</p><p>C语言中，指针是令初学者头痛的一块内容，所以我这里简单给大家聊两句。</p><p><strong>指针是什么？它是一个值，这个值代表一个内存地址，因此，指针就相当于指向某个内存地址的路标</strong>。</p><p>字符*表示指针，通常跟在类型关键字的后面，表示指针指向的是什么类型的值。比如，<code>char*</code>表示一个指向字符的指针，<code>float*</code>表示一个指向float类型的值的指针。</p><p>*这个符号除了表示指针以外，还可以作为运算符，用来取出指针变量所指向的内存地址里面的值。</p><p>而&amp;运算符用来取出一个变量所在的内存地址。</p><p>背会理解了这几句，可以说指针的理论基础就有了。跨过去指针这一关，C 语言最硬核的部分也就掌握了。</p><blockquote><p>需要阮一峰老师的这份《C语言入门教程》的小伙伴请扫描下方的二维码关注作者的原创公众号「<strong>沉默王二</strong>」回复关键字「<strong>08</strong>」就可以拉取到下载链接了。</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongzhonghao.png" alt="扫码关注后回复「08」关键字"></p><p>也可以微信搜「<strong>沉默王二</strong>」关注后回复关键字「<strong>08</strong>」。</p><p>OK，今天就简单聊到这里，希望阮一峰老师的这份教程能帮助到大家。我们下期见~</p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/download/yuanyifeng-c-language.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" 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class="page-title"><h1><!---->全文搜索引擎Elasticsearch入门教程</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" 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64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag5" role>Elasticsearch</li></ul><meta property="keywords" content="Elasticsearch"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 7 分钟</span><meta property="timeRequired" content="PT7M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/elasticsearch/rumen.html#_01、elasticsearch-是什么" class="router-link-active router-link-exact-active toc-link level3">01、Elasticsearch 是什么</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/elasticsearch/rumen.html#_02、安装-elasticsearch" class="router-link-active router-link-exact-active toc-link level3">02、安装 Elasticsearch</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/elasticsearch/rumen.html#_03、安装-kibana" class="router-link-active router-link-exact-active toc-link level3">03、安装 Kibana</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/elasticsearch/rumen.html#_04、elasticsearch-的关键概念" class="router-link-active router-link-exact-active toc-link level3">04、Elasticsearch 的关键概念</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/elasticsearch/rumen.html#_05、在-java-中使用-elasticsearch" class="router-link-active router-link-exact-active toc-link level3">05、在 Java 中使用 Elasticsearch</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/elasticsearch/rumen.html#_06、鸣谢" class="router-link-active router-link-exact-active toc-link level3">06、鸣谢</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="全文搜索引擎elasticsearch入门教程" tabindex="-1"><a class="header-anchor" href="#全文搜索引擎elasticsearch入门教程" aria-hidden="true">#</a> 全文搜索引擎Elasticsearch入门教程</h1><p>学习真的是一件令人开心的事情，上次分享了 <a href="https://mp.weixin.qq.com/s/NPJkMy5RppyFk9QhzHxhrw" target="_blank" rel="noopener noreferrer">Redis 入门<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>的文章后，收到了很多小伙伴的鼓励，比如说：“哎呀，不错呀，二哥，通俗易懂，十分钟真的入门了”。瞅瞅，瞅瞅，我决定再接再厉，入门一下 Elasticsearch，因为我们公司的商城系统升级了，需要用 Elasticsearch 做商品的搜索。</p><p>不过，我首先要声明一点，我对 Elasticsearch 并没有进行很深入的研究，仅仅是因为要用，就学一下。但作为一名负责任的技术博主，我是用心的，为此还特意在某某时间上买了一门视频课程，作者叫阮一鸣。说实话，他光秃秃的头顶让我对这门课程产生了浓厚的兴趣。</p><p>经过三天三夜的学习，总算是入了 Elasticsearch 的门，我就决定把这些心得体会分享出来，感兴趣的小伙伴可以作为参考。遇到文章中有错误的地方，不要手下留情，过来捶我，只要不打脸就好。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/elasticsearch/rumen-ebb2bdbc-2cdb-4540-b48f-41f92c848f2f.jpg" alt=""></p><h3 id="_01、elasticsearch-是什么" tabindex="-1"><a class="header-anchor" href="#_01、elasticsearch-是什么" aria-hidden="true">#</a> 01、Elasticsearch 是什么</h3><blockquote><p>Elasticsearch 是一个分布式、RESTful 风格的搜索和数据分析引擎，能够解决不断涌现出的各种用例。 作为 Elastic Stack 的核心，它集中存储您的数据，帮助您发现意料之中以及意料之外的情况。</p></blockquote><p>以上引用来自于官方，不得不说，解释得蛮文艺的。意料之中和意料之外，这两个词让我想起来了某一年的高考作文题（情理之中和意料之外）。</p><p>Elastic Stack 又是什么呢？整个架构图如下图（来源于网络，侵删）所示。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/elasticsearch/rumen-04b04318-25c9-4eb5-895e-9c608a4b26f9.jpg" alt=""></p><p>信息量比较多，对吧？那就记住一句话吧，Elasticsearch 是 Elastic Stack 的核心。</p><p>国内外的很多知名公司都在用 Elasticsearch，比如说滴滴、今日头条、谷歌、微软等等。Elasticsearch 有很多强大的功能，比如说全文搜索、购物推荐、附近定位推荐等等。</p><p>理论方面的内容就不说太多了，我怕小伙伴们会感到枯燥。毕竟入门嘛，实战才重要。</p><h3 id="_02、安装-elasticsearch" tabindex="-1"><a class="header-anchor" href="#_02、安装-elasticsearch" aria-hidden="true">#</a> 02、安装 Elasticsearch</h3><p>Elasticsearch 是由 Java 开发的，所以早期的版本需要先在电脑上安装 JDK 进行支持。后来的版本中内置了 Java 环境，所以直接下载就行了。Elasticsearch 针对不同的操作系统有不同的安装包，我们这篇入门的文章就以 Windows 为例吧。</p><p>下载地址如下：</p><p><a href="https://www.elastic.co/cn/downloads/elasticsearch" target="_blank" rel="noopener noreferrer">https://www.elastic.co/cn/downloads/elasticsearch<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><p>最新的版本是 7.6.2，280M 左右。但我硬生生花了 10 分钟的时间才下载完毕，不知道是不是连通的 200M 带宽不给力，还是官网本身下载的速度就慢，反正我去洗了 6 颗葡萄吃完后还没下载完。</p><p>Elasticsearch 是免安装的，只需要把 zip 包解压就可以了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/elasticsearch/rumen-07da0521-74eb-4a90-b17f-59258e622609.jpg" alt=""></p><p>1）bin 目录下是一些脚本文件，包括 Elasticsearch 的启动执行文件。</p><p>2）config 目录下是一些配置文件。</p><p>3）jdk 目录下是内置的 Java 运行环境。</p><p>4）lib 目录下是一些 Java 类库文件。</p><p>5）logs 目录下会生成一些日志文件。</p><p>6）modules 目录下是一些 Elasticsearch 的模块。</p><p>7）plugins 目录下可以放一些 Elasticsearch 的插件。</p><p>直接双击 bin 目录下的 elasticsearch.bat 文件就可以启动 Elasticsearch 服务了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/elasticsearch/rumen-7dd19afd-1aeb-49b6-a07c-f11e139fe3d3.jpg" alt=""></p><p>输出的日志信息有点多，不用细看，注意看到有“started”的字样就表明启动成功了。为了进一步确认 Elasticsearch 有没有启动成功，可以在浏览器的地址栏里输入 <code>http://localhost:9200</code> 进行查看（9200 是 Elasticsearch 的默认端口号）。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/elasticsearch/rumen-51f269c2-7482-494a-8a04-6585f20176a7.jpg" alt=""></p><p>你看，为了 Search。</p><p>那如何停止服务呢？可以直接按下 <code>Ctrl+C</code> 组合键——粗暴、壁咚。</p><h3 id="_03、安装-kibana" tabindex="-1"><a class="header-anchor" href="#_03、安装-kibana" aria-hidden="true">#</a> 03、安装 Kibana</h3><p>通过 Kibana，我们可以对 Elasticsearch 服务进行可视化操作，就像在 Linux 操作系统下安装一个图形化界面一样。</p><p>下载地址如下：</p><p><a href="https://www.elastic.co/cn/downloads/kibana" target="_blank" rel="noopener noreferrer">https://www.elastic.co/cn/downloads/kibana<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><p>最新的版本是 7.6.2，284M 左右，体积和 Elasticsearch 差不多。选择下载 Windows 版，zip 格式的，完成后直接解压就行了。下载的过程中又去洗了 6 颗葡萄吃，狗头。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/elasticsearch/rumen-12372ee6-acc0-4425-964b-ca32886f17ce.jpg" alt=""></p><p>包目录不再一一解释了，进入 bin 目录下，双击运行 kibana.bat 文件，启动 Kibana 服务。整个过程比 Elasticsearch 要慢一些，当看到 <code>[Kibana][http] http server running</code> 的信息后，说明服务启动成功了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/elasticsearch/rumen-784d70ef-b6e7-4312-85f1-36ace9b2a5bd.jpg" alt=""></p><p>在浏览器地址栏输入 <code>http://localhost:5601</code> 查看 Kibana 的图形化界面。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/elasticsearch/rumen-e6f64545-a925-4bb4-a25e-44129832fb4e.jpg" alt=""></p><p>由于当前的 Elasticsearch 服务端中还没有任何数据，所以我们可以选择「Try Our Sample Data」导入 Kibana 提供的模拟数据体验一下。下图是导入电商数据库的看板页面，是不是很丰富？</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/elasticsearch/rumen-a16d99ff-272d-43bb-aa94-23b240cc464b.jpg" alt=""></p><p>打开 Dev Tools 面板，可以看到一个简单的 DSL 查询语句（一种完全基于 JSON 的特定于领域的语言），点击「运行」按钮后就可以看到 JSON 格式的数据了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/elasticsearch/rumen-5c44bd79-d3a9-49fb-9414-04dc38840cfb.jpg" alt=""></p><h3 id="_04、elasticsearch-的关键概念" tabindex="-1"><a class="header-anchor" href="#_04、elasticsearch-的关键概念" aria-hidden="true">#</a> 04、Elasticsearch 的关键概念</h3><p>在进行下一步之前，需要先来理解 Elasticsearch 中的几个关键概念，比如说什么是索引，什么是类型，什么是文档等等。Elasticsearch 既然是一个数据引擎，它里面的一些概念就和 MySQL 有一定的关系。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/elasticsearch/rumen-ad2b2f8c-5a19-4c5e-9bc7-cf7ba17830bf.jpg" alt=""></p><p>看完上面这幅图（来源于网络，侵删），是不是瞬间就清晰了。向 Elasticsearch 中存储数据，其实就是向 Elasticsearch 中的 index 下面的 type 中存储 JSON 类型的数据。</p><h3 id="_05、在-java-中使用-elasticsearch" tabindex="-1"><a class="header-anchor" href="#_05、在-java-中使用-elasticsearch" aria-hidden="true">#</a> 05、在 Java 中使用 Elasticsearch</h3><p>有些小伙伴可能会问，“二哥，我是一名 Java 程序员，我该如何在 Java 中使用 Elasticsearch 呢？”这个问题问得好，这就来，这就来。</p><p>Elasticsearch 既然内置了 Java 运行环境，自然就提供了一系列 API 供我们操作。</p><p>第一步，在项目中添加 Elasticsearch 客户端依赖：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
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aria-label="01、Elasticsearch 是什么"><!---->01、Elasticsearch 是什么<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/elasticsearch/rumen.html#_02、安装-elasticsearch" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="02、安装 Elasticsearch"><!---->02、安装 Elasticsearch<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/elasticsearch/rumen.html#_03、安装-kibana" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="03、安装 Kibana"><!---->03、安装 Kibana<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/elasticsearch/rumen.html#_04、elasticsearch-的关键概念" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="04、Elasticsearch 的关键概念"><!---->04、Elasticsearch 的关键概念<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/elasticsearch/rumen.html#_05、在-java-中使用-elasticsearch" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="05、在 Java 中使用 Elasticsearch"><!---->05、在 Java 中使用 Elasticsearch<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/elasticsearch/rumen.html#_06、鸣谢" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="06、鸣谢"><!---->06、鸣谢<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/zookeeper/jibenjieshao.html" class="nav-link sidebar-link sidebar-page" aria-label="聊聊ZooKeeper"><!---->聊聊ZooKeeper<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/microservice/api-wangguan.html" class="nav-link sidebar-link sidebar-page" aria-label="聊聊微服务网关"><!---->聊聊微服务网关<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.8 消息队列</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->全文搜索引擎Elasticsearch入门教程</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月17日</span><meta property="datePublished" content="2022-03-17T03:18:03.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 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aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag5" role>Elasticsearch</li></ul><meta property="keywords" content="Elasticsearch"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 7 分钟</span><meta property="timeRequired" content="PT7M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/elasticsearch/rumen.html#_01、elasticsearch-是什么" class="router-link-active router-link-exact-active toc-link level3">01、Elasticsearch 是什么</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/elasticsearch/rumen.html#_02、安装-elasticsearch" class="router-link-active router-link-exact-active toc-link level3">02、安装 Elasticsearch</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/elasticsearch/rumen.html#_03、安装-kibana" class="router-link-active router-link-exact-active toc-link level3">03、安装 Kibana</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/elasticsearch/rumen.html#_04、elasticsearch-的关键概念" class="router-link-active router-link-exact-active toc-link level3">04、Elasticsearch 的关键概念</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/elasticsearch/rumen.html#_05、在-java-中使用-elasticsearch" class="router-link-active router-link-exact-active toc-link level3">05、在 Java 中使用 Elasticsearch</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/elasticsearch/rumen.html#_06、鸣谢" class="router-link-active router-link-exact-active toc-link level3">06、鸣谢</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="全文搜索引擎elasticsearch入门教程" tabindex="-1"><a class="header-anchor" href="#全文搜索引擎elasticsearch入门教程" aria-hidden="true">#</a> 全文搜索引擎Elasticsearch入门教程</h1><p>学习真的是一件令人开心的事情，上次分享了 <a href="https://mp.weixin.qq.com/s/NPJkMy5RppyFk9QhzHxhrw" target="_blank" rel="noopener noreferrer">Redis 入门<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>的文章后，收到了很多小伙伴的鼓励，比如说：“哎呀，不错呀，二哥，通俗易懂，十分钟真的入门了”。瞅瞅，瞅瞅，我决定再接再厉，入门一下 Elasticsearch，因为我们公司的商城系统升级了，需要用 Elasticsearch 做商品的搜索。</p><p>不过，我首先要声明一点，我对 Elasticsearch 并没有进行很深入的研究，仅仅是因为要用，就学一下。但作为一名负责任的技术博主，我是用心的，为此还特意在某某时间上买了一门视频课程，作者叫阮一鸣。说实话，他光秃秃的头顶让我对这门课程产生了浓厚的兴趣。</p><p>经过三天三夜的学习，总算是入了 Elasticsearch 的门，我就决定把这些心得体会分享出来，感兴趣的小伙伴可以作为参考。遇到文章中有错误的地方，不要手下留情，过来捶我，只要不打脸就好。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/elasticsearch/rumen-ebb2bdbc-2cdb-4540-b48f-41f92c848f2f.jpg" alt=""></p><h3 id="_01、elasticsearch-是什么" tabindex="-1"><a class="header-anchor" href="#_01、elasticsearch-是什么" aria-hidden="true">#</a> 01、Elasticsearch 是什么</h3><blockquote><p>Elasticsearch 是一个分布式、RESTful 风格的搜索和数据分析引擎，能够解决不断涌现出的各种用例。 作为 Elastic Stack 的核心，它集中存储您的数据，帮助您发现意料之中以及意料之外的情况。</p></blockquote><p>以上引用来自于官方，不得不说，解释得蛮文艺的。意料之中和意料之外，这两个词让我想起来了某一年的高考作文题（情理之中和意料之外）。</p><p>Elastic Stack 又是什么呢？整个架构图如下图（来源于网络，侵删）所示。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/elasticsearch/rumen-04b04318-25c9-4eb5-895e-9c608a4b26f9.jpg" alt=""></p><p>信息量比较多，对吧？那就记住一句话吧，Elasticsearch 是 Elastic Stack 的核心。</p><p>国内外的很多知名公司都在用 Elasticsearch，比如说滴滴、今日头条、谷歌、微软等等。Elasticsearch 有很多强大的功能，比如说全文搜索、购物推荐、附近定位推荐等等。</p><p>理论方面的内容就不说太多了，我怕小伙伴们会感到枯燥。毕竟入门嘛，实战才重要。</p><h3 id="_02、安装-elasticsearch" tabindex="-1"><a class="header-anchor" href="#_02、安装-elasticsearch" aria-hidden="true">#</a> 02、安装 Elasticsearch</h3><p>Elasticsearch 是由 Java 开发的，所以早期的版本需要先在电脑上安装 JDK 进行支持。后来的版本中内置了 Java 环境，所以直接下载就行了。Elasticsearch 针对不同的操作系统有不同的安装包，我们这篇入门的文章就以 Windows 为例吧。</p><p>下载地址如下：</p><p><a href="https://www.elastic.co/cn/downloads/elasticsearch" target="_blank" rel="noopener noreferrer">https://www.elastic.co/cn/downloads/elasticsearch<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><p>最新的版本是 7.6.2，280M 左右。但我硬生生花了 10 分钟的时间才下载完毕，不知道是不是连通的 200M 带宽不给力，还是官网本身下载的速度就慢，反正我去洗了 6 颗葡萄吃完后还没下载完。</p><p>Elasticsearch 是免安装的，只需要把 zip 包解压就可以了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/elasticsearch/rumen-07da0521-74eb-4a90-b17f-59258e622609.jpg" alt=""></p><p>1）bin 目录下是一些脚本文件，包括 Elasticsearch 的启动执行文件。</p><p>2）config 目录下是一些配置文件。</p><p>3）jdk 目录下是内置的 Java 运行环境。</p><p>4）lib 目录下是一些 Java 类库文件。</p><p>5）logs 目录下会生成一些日志文件。</p><p>6）modules 目录下是一些 Elasticsearch 的模块。</p><p>7）plugins 目录下可以放一些 Elasticsearch 的插件。</p><p>直接双击 bin 目录下的 elasticsearch.bat 文件就可以启动 Elasticsearch 服务了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/elasticsearch/rumen-7dd19afd-1aeb-49b6-a07c-f11e139fe3d3.jpg" alt=""></p><p>输出的日志信息有点多，不用细看，注意看到有“started”的字样就表明启动成功了。为了进一步确认 Elasticsearch 有没有启动成功，可以在浏览器的地址栏里输入 <code>http://localhost:9200</code> 进行查看（9200 是 Elasticsearch 的默认端口号）。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/elasticsearch/rumen-51f269c2-7482-494a-8a04-6585f20176a7.jpg" alt=""></p><p>你看，为了 Search。</p><p>那如何停止服务呢？可以直接按下 <code>Ctrl+C</code> 组合键——粗暴、壁咚。</p><h3 id="_03、安装-kibana" tabindex="-1"><a class="header-anchor" href="#_03、安装-kibana" aria-hidden="true">#</a> 03、安装 Kibana</h3><p>通过 Kibana，我们可以对 Elasticsearch 服务进行可视化操作，就像在 Linux 操作系统下安装一个图形化界面一样。</p><p>下载地址如下：</p><p><a href="https://www.elastic.co/cn/downloads/kibana" target="_blank" rel="noopener noreferrer">https://www.elastic.co/cn/downloads/kibana<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><p>最新的版本是 7.6.2，284M 左右，体积和 Elasticsearch 差不多。选择下载 Windows 版，zip 格式的，完成后直接解压就行了。下载的过程中又去洗了 6 颗葡萄吃，狗头。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/elasticsearch/rumen-12372ee6-acc0-4425-964b-ca32886f17ce.jpg" alt=""></p><p>包目录不再一一解释了，进入 bin 目录下，双击运行 kibana.bat 文件，启动 Kibana 服务。整个过程比 Elasticsearch 要慢一些，当看到 <code>[Kibana][http] http server running</code> 的信息后，说明服务启动成功了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/elasticsearch/rumen-784d70ef-b6e7-4312-85f1-36ace9b2a5bd.jpg" alt=""></p><p>在浏览器地址栏输入 <code>http://localhost:5601</code> 查看 Kibana 的图形化界面。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/elasticsearch/rumen-e6f64545-a925-4bb4-a25e-44129832fb4e.jpg" alt=""></p><p>由于当前的 Elasticsearch 服务端中还没有任何数据，所以我们可以选择「Try Our Sample Data」导入 Kibana 提供的模拟数据体验一下。下图是导入电商数据库的看板页面，是不是很丰富？</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/elasticsearch/rumen-a16d99ff-272d-43bb-aa94-23b240cc464b.jpg" alt=""></p><p>打开 Dev Tools 面板，可以看到一个简单的 DSL 查询语句（一种完全基于 JSON 的特定于领域的语言），点击「运行」按钮后就可以看到 JSON 格式的数据了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/elasticsearch/rumen-5c44bd79-d3a9-49fb-9414-04dc38840cfb.jpg" alt=""></p><h3 id="_04、elasticsearch-的关键概念" tabindex="-1"><a class="header-anchor" href="#_04、elasticsearch-的关键概念" aria-hidden="true">#</a> 04、Elasticsearch 的关键概念</h3><p>在进行下一步之前，需要先来理解 Elasticsearch 中的几个关键概念，比如说什么是索引，什么是类型，什么是文档等等。Elasticsearch 既然是一个数据引擎，它里面的一些概念就和 MySQL 有一定的关系。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/elasticsearch/rumen-ad2b2f8c-5a19-4c5e-9bc7-cf7ba17830bf.jpg" alt=""></p><p>看完上面这幅图（来源于网络，侵删），是不是瞬间就清晰了。向 Elasticsearch 中存储数据，其实就是向 Elasticsearch 中的 index 下面的 type 中存储 JSON 类型的数据。</p><h3 id="_05、在-java-中使用-elasticsearch" tabindex="-1"><a class="header-anchor" href="#_05、在-java-中使用-elasticsearch" aria-hidden="true">#</a> 05、在 Java 中使用 Elasticsearch</h3><p>有些小伙伴可能会问，“二哥，我是一名 Java 程序员，我该如何在 Java 中使用 Elasticsearch 呢？”这个问题问得好，这就来，这就来。</p><p>Elasticsearch 既然内置了 Java 运行环境，自然就提供了一系列 API 供我们操作。</p><p>第一步，在项目中添加 Elasticsearch 客户端依赖：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
     &lt;groupId&gt;org.elasticsearch.client&lt;/groupId&gt;
     &lt;artifactId&gt;elasticsearch-rest-high-level-client&lt;/artifactId&gt;
     &lt;version&gt;7.6.2&lt;/version&gt;
@@ -72,6 +72,6 @@
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>1）RestHighLevelClient 为 Elasticsearch 提供的 REST 客户端，可以通过 HTTP 的形式连接到 Elasticsearch 服务器，参数为主机名和端口号。</p><p>有了 RestHighLevelClient 客户端，我们就可以向 Elasticsearch 服务器端发送请求并获取响应。</p><p>2）IndexRequest 用于向 Elasticsearch 服务器端添加一个索引，参数为索引关键字，比如说“writer”，还可以指定 id。通过 source 的方式可以向当前索引中添加文档数据源（键值对的形式）。</p><p>有了 IndexRequest 对象后，可以调用客户端的 <code>index()</code> 方法向 Elasticsearch 服务器添加索引。</p><p>3）GetRequest 用于向 Elasticsearch 服务器端发送一个 get 请求，参数为索引关键字，以及 id。</p><p>有了 GetRequest 对象后，可以调用客户端的 <code>get()</code> 方法向 Elasticsearch 服务器获取索引。<code>getSourceAsString()</code> 用于从响应中获取文档数据源（JSON 字符串的形式）。</p><p>好了，来看一下程序的输出结果：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>{&quot;name&quot;:&quot;沉默王二&quot;,&quot;age&quot;:18,&quot;memo&quot;:&quot;一枚有趣的程序员&quot;}
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>完全符合我们的预期，perfect！</p><p>也可以通过 Kibana 的 Dev Tools 面板查看“writer”索引，结果如下图所示。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/elasticsearch/rumen-64baa243-0075-436e-a070-f28813fee284.jpg" alt=""></p><h3 id="_06、鸣谢" tabindex="-1"><a class="header-anchor" href="#_06、鸣谢" aria-hidden="true">#</a> 06、鸣谢</h3><p>好了，我亲爱的小伙伴们，以上就是本文的全部内容了，是不是看完后很想实操一把 Elasticsearch，赶快行动吧！如果你在学习的过程中遇到了问题，欢迎随时和我交流，虽然我也是个菜鸟，但我有热情啊。</p><p>另外，如果你想写入门级别的文章，这篇就是最好的范例。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/elasticsearch/rumen.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/14 上午7:14:28</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><!----><a href="/zookeeper/jibenjieshao.html" class="nav-link next" aria-label="聊聊ZooKeeper"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">聊聊ZooKeeper<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->一文读懂Java异常处理</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 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class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/exception/gailan.html#一、什么是异常" class="router-link-active router-link-exact-active toc-link level2">一、什么是异常</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/exception/gailan.html#二、exception和error的区别" class="router-link-active router-link-exact-active toc-link level2">二、Exception和Error的区别</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/exception/gailan.html#三、checked和unchecked异常" class="router-link-active router-link-exact-active toc-link level2">三、checked和unchecked异常</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/exception/gailan.html#四、关于-try-catch-finally" class="router-link-active router-link-exact-active toc-link level2">四、关于 try-catch-finally</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/exception/gailan.html#五、关于-throw-和-throws" class="router-link-active router-link-exact-active toc-link level2">五、关于 throw 和 throws</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="一文读懂java异常处理" tabindex="-1"><a class="header-anchor" href="#一文读懂java异常处理" aria-hidden="true">#</a> 一文读懂Java异常处理</h1><h2 id="一、什么是异常" tabindex="-1"><a class="header-anchor" href="#一、什么是异常" aria-hidden="true">#</a> 一、什么是异常</h2><p>“二哥，今天就要学习异常了吗？”三妹问。</p><p>“是的。只有正确地处理好异常，才能保证程序的可靠性，所以异常的学习还是很有必要的。”我说。</p><p>“那到底什么是异常呢？”三妹问。</p><p>“异常是指中断程序正常执行的一个不确定的事件。当异常发生时，程序的正常执行流程就会被打断。一般情况下，程序都会有很多条语句，如果没有异常处理机制，前面的语句一旦出现了异常，后面的语句就没办法继续执行了。”</p><p>“有了异常处理机制后，程序在发生异常的时候就不会中断，我们可以对异常进行捕获，然后改变程序执行的流程。”</p><p>“除此之外，异常处理机制可以保证我们向用户提供友好的提示信息，而不是程序原生的异常信息——用户根本理解不了。”</p><p>“不过，站在开发者的角度，我们更希望看到原生的异常信息，因为这有助于我们更快地找到 bug 的根源，反而被过度包装的异常信息会干扰我们的视线。”</p><p>“Java 语言在一开始就提供了相对完善的异常处理机制，这种机制大大降低了编写可靠程序的门槛，这也是 Java 之所以能够流行的原因之一。”</p><p>“那导致程序抛出异常的原因有哪些呢？”三妹问。</p><p>比如说：</p><ul><li>程序在试图打开一个不存在的文件；</li><li>程序遇到了网络连接问题；</li><li>用户输入了糟糕的数据；</li><li>程序在处理算术问题时没有考虑除数为 0 的情况；</li></ul><p>等等等等。</p><p>挑个最简单的原因来说吧。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">Demo</span> <span class="token punctuation">{</span>
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class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section 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target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2021年7月13日</span><meta property="datePublished" content="2021-07-13T07:01:13.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 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2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 14 分钟</span><meta property="timeRequired" content="PT14M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/exception/gailan.html#一、什么是异常" class="router-link-active router-link-exact-active toc-link level2">一、什么是异常</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/exception/gailan.html#二、exception和error的区别" class="router-link-active router-link-exact-active toc-link level2">二、Exception和Error的区别</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/exception/gailan.html#三、checked和unchecked异常" class="router-link-active router-link-exact-active toc-link level2">三、checked和unchecked异常</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/exception/gailan.html#四、关于-try-catch-finally" class="router-link-active router-link-exact-active toc-link level2">四、关于 try-catch-finally</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/exception/gailan.html#五、关于-throw-和-throws" class="router-link-active router-link-exact-active toc-link level2">五、关于 throw 和 throws</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="一文读懂java异常处理" tabindex="-1"><a class="header-anchor" href="#一文读懂java异常处理" aria-hidden="true">#</a> 一文读懂Java异常处理</h1><h2 id="一、什么是异常" tabindex="-1"><a class="header-anchor" href="#一、什么是异常" aria-hidden="true">#</a> 一、什么是异常</h2><p>“二哥，今天就要学习异常了吗？”三妹问。</p><p>“是的。只有正确地处理好异常，才能保证程序的可靠性，所以异常的学习还是很有必要的。”我说。</p><p>“那到底什么是异常呢？”三妹问。</p><p>“异常是指中断程序正常执行的一个不确定的事件。当异常发生时，程序的正常执行流程就会被打断。一般情况下，程序都会有很多条语句，如果没有异常处理机制，前面的语句一旦出现了异常，后面的语句就没办法继续执行了。”</p><p>“有了异常处理机制后，程序在发生异常的时候就不会中断，我们可以对异常进行捕获，然后改变程序执行的流程。”</p><p>“除此之外，异常处理机制可以保证我们向用户提供友好的提示信息，而不是程序原生的异常信息——用户根本理解不了。”</p><p>“不过，站在开发者的角度，我们更希望看到原生的异常信息，因为这有助于我们更快地找到 bug 的根源，反而被过度包装的异常信息会干扰我们的视线。”</p><p>“Java 语言在一开始就提供了相对完善的异常处理机制，这种机制大大降低了编写可靠程序的门槛，这也是 Java 之所以能够流行的原因之一。”</p><p>“那导致程序抛出异常的原因有哪些呢？”三妹问。</p><p>比如说：</p><ul><li>程序在试图打开一个不存在的文件；</li><li>程序遇到了网络连接问题；</li><li>用户输入了糟糕的数据；</li><li>程序在处理算术问题时没有考虑除数为 0 的情况；</li></ul><p>等等等等。</p><p>挑个最简单的原因来说吧。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">Demo</span> <span class="token punctuation">{</span>
     <span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">void</span> <span class="token function">main</span><span class="token punctuation">(</span><span class="token class-name">String</span><span class="token punctuation">[</span><span class="token punctuation">]</span> args<span class="token punctuation">)</span> <span class="token punctuation">{</span>
         <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token number">10</span><span class="token operator">/</span><span class="token number">0</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
     <span class="token punctuation">}</span>
@@ -211,6 +211,6 @@
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>来看一下输出结果：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>即使 try 块有 return，finally 块也会执行
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>“那，会不会有不执行 finally 的情况呀？”三妹很好奇。</p><p>“有的。”我斩钉截铁地回答。</p><ul><li>遇到了死循环。</li><li>执行了 <code>System. exit()</code> 这行代码。</li></ul><p><code>System.exit()</code> 和 <code>return</code> 语句不同，前者是用来退出程序的，后者只是回到了上一级方法调用。</p><p>“三妹，来看一下源码的文档注释就全明白了！”</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/exception/try-catch-finally-01.png" alt=""></p><p>至于参数 status 的值也很好理解，如果是异常退出，设置为非 0 即可，通常用 1 来表示；如果是想正常退出程序，用 0 表示即可。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/exception/gailan.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/12 下午4:24:21</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><!----><a href="/exception/try-with-resouces.html" class="nav-link next" aria-label="try-with-resouces"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">try-with-resouces<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java空指针NullPointerException的传说</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span 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2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 13 分钟</span><meta property="timeRequired" content="PT13M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="java空指针nullpointerexception的传说" tabindex="-1"><a class="header-anchor" href="#java空指针nullpointerexception的传说" aria-hidden="true">#</a> Java空指针NullPointerException的传说</h1><p><strong>空指针</strong>，号称天下最强刺客。</p><p>他原本不叫这个名字，空指针原本复姓<strong>异常</strong>，空指针只不过是他的武器，但他杀戮过多，渐渐地人们只记住了空指针这三个字。</p><p>天下武功，唯快不破，空指针的针，以快和诡异著称，稍有不慎，便是伤亡。</p><p>... ...</p><p>我叫铁柱，我来到这个奇怪的世界已经一年了，我等了一年，穿越附赠的老爷爷、戒指、系统什么的我到现在都没发现。</p><p>而且这个世界看起来也太奇怪了，这里好像叫什么 <strong>Java</strong> 大陆，我只知道这个世界的最强者叫做 <strong>Object</strong>，听说是什么道祖级的存在，我也不知道是什么意思，毕竟我现在好像还是个菜鸡，别的主角一年都应该要飞升仙界了吧，我还连个小火球都放不出来。</p><p>哦，对了，上面的那段话是我在茶馆喝茶的时候听说书的先生说的，总觉得空指针这个名字怪怪的，好像在什么地方听说过。</p><p>我的头痛的毛病又犯了，我已经记不起来我为什么来到这里了，我只记得我的名字叫铁柱，其他的，我只感觉这个奇怪的世界有一种熟悉，但是我什么都记不起来了。</p><p>算了，得过且过吧。</p><p>我准备去找空指针了，虽然听说他很可怕，但是好像听说他不是嗜杀之人，应该不会滥杀无辜吧，目前为止，我也只对这三个字有熟悉的感觉了，我一定要找到他，找回我的记忆！</p><p>我打听了很久，原来空指针是<strong>异常组织</strong>的三代嫡传，异常组织是这个世界上最恐怖的杀手组织，空指针就是异常现在最出色的刺客。</p><p>听说空指针出生的时候，脖子上就挂着一根针，整个 Java 大陆雪下一月不停，Linux 森林多块陆地直接沉陷，于是他的父亲 <strong>RuntimeException</strong> 就给他起了空指针这个名字。</p><p>空指针出生的天生异象也引起了异常组织高层的注意，听说他的祖父 <strong>Exception</strong>，还有整个异常组织的领军人物 <strong>Throwable</strong> 都亲自接见了空指针，并且认为空指针天赋异禀，未来可期。</p><p>要知道，<strong>Throwable</strong> 可是 <strong>Object</strong> 亲自任命的异常组织头领。作为 Object 最值得信任的亲信，跟随 Object 万年以来，所有的脏活累活都依靠 Thrwoable 创立的异常组织来处理，真可谓一人之下，万人之上。</p><p>Throwable 只有两个亲子，就是 Error 和 Exception，传说中 Error 心狠手辣，手下无一活口，见过 Error 的人还能活下来的寥寥无几。</p><p>整个大陆只有他们恐怖的传说，谁也不知道他们什么时候出现，但是一旦他们出现，基本宣告着你已经是个死人了。</p><p>而我听说过最恐怖的就是<code>OutOfMemoryError</code> 和 <code>StackOverflowError</code> 这两位刺客，因为大陆上永远有一座风云榜悬挂在帝都门口，而这两位，一直位居杀手榜榜首位置，空指针也只只能屈居第三而已。当然，大陆不少人都认为空指针会后来居上。</p><p>我的消息只是打听到这么多，接下来的日子，我走过无数的城市、荒野，我穿过沙漠、丛林，这一天，终于，我来到了大陆的帝都--<strong>堆</strong>。</p><p>这个名字听起来也有点耳熟，不管他，先进城再说。</p><p>进城后我发现这里非常诡异，整座城市好像都非常年轻，好像连一个成年人都没有！街道上熙熙攘攘竟然都是年轻人。</p><p>带着疑惑，我走进了一家叫做<em>同福客栈</em>的酒楼。</p><p>”客官，打尖还是住店啊？“一个小二模样的<em>小孩</em>带着一丝谄媚的对我说。</p><p>”住店，带我去最好的房间，这些钱先押你这里，不够再跟我要。“一路走来，对于这些地方的行情我也算轻车熟路了。</p><p>”小朋友，这里是怎么回事？你们这里没有大人吗？“我一边走一边问这个只有我一半身高的小孩，根据我目测，他身高不超过1米，应该还只有七八岁的样子，难道这里的商人如此黑心，竟然雇佣童工，不过这也不貌似不对，因为周围的客人好像也都是这般年纪，他们竟然还有在抽烟喝酒的！</p><p>”客官可真幽默，不过我看客官应该是刚来帝都，不瞒您说，整个帝都就基本没有超过15岁的人，超过15的据说都在叫做老年区的养老去了！就拿我来说吧，我今年可不小了，我都8岁了，像我这般年纪的已经半截腿迈进棺材咯。哎，这身子也是一年不如一年了。“</p><p>看着这个小二一脸认真的样子，我越发觉得这座城市诡异起来了！8岁，什么鬼？8岁不是应该在家里看喜羊羊吗？！还半截腿迈进棺材！</p><p>”可是你看我比你高这么多，你不觉得奇怪吗？“我奇怪的问他。</p><p>”有什么好奇怪的，要不是我小时候喝多了三鹿，没准我也长这么高了！“小二有点生气的对我说。</p><p>行吧，再说两句把他激怒了，跳起来打我膝盖就大事不妙了。</p><p>接下来的几天，经过我的打探，原来我在的地方是叫做年轻区，整个帝都就只有这两个区域，年轻区的人年龄确实没有超过15岁的，有些人刚出生没几天就死了，对此，生活在这里的人也见怪不怪了。对于他们来说，寄希望能活到超过15岁进入老年区养老就是他们的梦想。</p><p>我在怀疑是不是异常组织在这里暗杀，可是发现结果并不是，这里的人貌似已经习惯了，生活对他们来说就是随便活活就好了，每次的死亡对于他们来说毫无征兆，可能刚踢着球呢，就突然挂了，有的上着厕所突然就死了，临死前连个屁股都没擦，不说了，有点恶心。</p><p>就在我等的不耐烦想打算去老年区看看的时候，一个穿着黑衣的人找到了我。</p><p>”你是谁？“我警惕的问他。</p><p>”本座IOException。“黑衣人神情冰冷的看着我说。</p><p>”你找我什么事？“</p><p>”这些你不用知道，跟我走一趟吧！“</p><p>我刚想说话拒绝，开什么玩笑，跟你们异常组打交道的人非死即残，谁要跟你去。</p><p>但是由不得我拒绝，我只感觉一阵天旋地转，我感觉我在天上飞，然后我就失去了意识。当我醒来的时候，我发现我躺在一张巨大的床上，桌子上点着一支檀香，整个房间只有一张桌子、一把椅子和我躺的地方。</p><p>房间很小，应该只有10几个平方，但是我竟然又有一种熟悉的感觉，这种感觉萦绕在我心头挥散不去。</p><p>没等我再想更多，房门打开了。</p><p>”是你，你把我带来干什么？“</p><p>”走吧，有人要见你。“</p><p>还是不容我抗拒，如果我的战斗力是5的话，我想，IO他该有好几万了吧。</p><p>又是这该死的眩晕感，不过这次没有几秒钟，我就发现我在一个花园里，花园中间一个身穿黄袍的中年人正在慢悠悠的喝茶。在他身上我感受不到任何强大的气息，甚至不如IOException给我的压迫感强烈。这是谁？</p><p>不等我思绪飘飞，IOException弯腰躬身说道：”陛下，人带过来了。“</p><p>”嗯，你退下吧。“中年人转过身来，脸上丝毫看不出情绪的说道。</p><p>我大概猜到了这是哪里了，于是也放下心来，在这里，或许能找到我的答案。</p><p>反正他要对我怎么样，我也没有办法反抗，我径直坐到他的对面，看着他说：”您就是Object陛下吧，不知找我所谓何事？“</p><p>中年人也不在意，没有正面回答我的问题，反而略带一丝调侃的说道：”不用咬文嚼字，说点正常人的话吧。“</p><p>... ...</p><p>这不按套路出牌啊，我这不是来久了，模仿你们古代人说话嘛，怎么还埋怨起我来了？！</p><p>”那我就直说了，我想知道空指针在哪里。“</p><p>”空指针就在皇宫轮值，你找他干嘛？“</p><p>”我暂时不能说“</p><p>”呵呵，你就不好奇我为什么知道你，为什么又把你带过来？“</p><p>”好奇，可是我就是不想问。“</p><p>Object喝了口茶，不紧不慢的回道：”年轻人有性格是好事，可是过刚易折的道理你应该明白。“</p><p>”我不明白，我在这里反正也没看见什么老人，当然，除了你。“我理所当然的认为这肯定是Object搞得鬼，整个帝都都是小朋友，要是没有猫腻，骗鬼呢！</p><p>Object听到这话，皱了皱眉，他沉默了一会儿，缓缓站起身子走到一颗柳树下，背着手说道：“你不知道这一切是为什么吗？”</p><p>废话，我当然不知道了，我知道还能问你吗？！</p><p>又是沉默... ...这个气氛让我感觉很不舒服。就在我受不了想说话的时候，Object突然说了一句：“带他去见空指针吧。”</p><p>“是，陛下！”突然，一个身穿红袍的枯瘦老者出现在我背后，把我吓了一跳。</p><p>我也不想再多生事端，直觉告诉我这里不是久留之地，虽然有点莫名其妙，我还是跟着红袍老者来走了。</p><p>... ...</p><p>“陛下，是他吗？”一个光头大汉的身影在半空若影若现的说道。</p><p>“还不能确定... 不过，留给我们的时间不多了，下一次的轮回就快来了。”</p><p>“轮回，又是轮回。我们还有希望吗？”大汉呢喃着，不知道是对自己说还是对中年人说。</p><p>中年人依然背着手，抬头望着漫天的柳絮说道：“这一世，该是个了断了。”</p><p>... ...</p><p>没多久，他把我带到一个房间门口，也是面无表情的说道：“进去吧，空指针就在里面。”</p><p>我挺住脚步，转过身问他：“你是谁？我们是不是见过？”</p><p>红袍老者怪异一笑：“也许吧，老夫<code>IndexOutOfBoundsException</code>，空指针便是我好友。”</p><p>这个名字可真长，我听说过他，据传闻他的实力也非常之强，可能不下于空指针，都是以诡异的出手角度著称，不过相比于空指针的大名，他好像更低调，难怪在皇宫当个老太监一般。</p><p>我也不在多想，点点头，走进了房间。刚进房间，我就看见一个一身白衣的身影背对着我，笔直的身影好像要冲破天际，身上的气势强大无比，至少在我见过的所有人里足以排进前三了。空指针，果然名不虚传！</p><p>我走到房间中央，环目四望才发现这好像是一座祠堂的样子，就在我还在打量四周之际，一道清冷的声音传到我的耳边：</p><p>“你身上的气息让我非常讨厌！”</p><p>他转过身来，我发现我根本看不清空指针长什么样子，他的脸好像打上了马赛克。听到他的话，我心里的疑惑更多了，我只是觉得他的气息让我感到非常熟悉，他的话让我有点莫名其妙。于是我试探道：</p><p>“你知道我是谁？”</p><p>听到我的话，他一步步走进我，在我身边闻了闻，这让我什么一紧，虽然我想搞清楚我身上的问题，但是我不是出卖肉体的人，我退后一步说：</p><p>“你想干嘛？”</p><p>空指针皱紧了眉头，仿佛自言自语道：“不对，不对，这是... 规则的气息？可是他明明身上没有任何能量波动。”</p><p>我见他好像魔怔了，仿佛在思考什么，于是迈步走到他刚才站立的地方看着前面，原来，这是他们的族谱！这里是异常的祠堂！</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/exception/npe-1.jpg" alt=""></p><p>看完这张族谱，我恍然大悟，好像明白了什么。突然，我的脑袋里出现了一个冰冷的机器声音：“获取异常族谱，历练完成度+100。”</p><p>我Kao，系统，这是系统啊，我不禁内牛满面，啥任务系统啊，一点提示都没有，我赶紧喊道：</p><p>“系统，系统，还在吗？在线等，挺着急的。”可是没有任何回复！这啥破系统！就在我想破口大骂的时候，空指针看到我和个二傻子似的大呼小叫，突然一脸不可思议的对着我说：</p><p>“你明悟了规则？”</p><p>我愣了愣，嗯？难道我不是战5渣了？规则之力？好像是很高端的样子啊？</p><p>“撒豆成兵！”</p><p>“呼风！”</p><p>”唤雨！“</p><p>”临兵斗者皆阵列在前！“</p><p>一点反应都没有。。。啥玩意儿？还规则之力？九字真言都没用啊？</p><p>空指针好像都蒙了，他敲了敲太阳穴，无语的看着我说：</p><p>”你不是来找我的吗？说完你的问题，然后给我滚！“</p><p>对啊，这系统把我整的我都忘记我来干嘛的了，我赶紧说：</p><p>”你认识我对不对，你是不是觉得我有一种熟悉的感觉？我想知道我的来历！“</p><p>空指针又愣了愣，他看着我，沉默了一会儿，回道：“不知道！”</p><p>我有点奇怪，看他一脸便秘的表情应该是见过我的，他一定在撒谎，既然如此...</p><p>“那你告诉我你们有什么办法能在你们异常的攻击下防身吧？”</p><p>空指针大怒，刚想起身说话，空中突然传来一道声音：答应他的要求！</p><p>他冷哼一声，丢给我一本书，上面写着<strong>catch</strong>一个字，还有一块写着<strong>catch</strong>的令牌，冰冷的说到：“你想知道的都在这里了。”说完，拂袖而去。</p><p>我看着桌子上的这本书，想了想还是翻阅起来。</p><p>原来<code>Exception</code> 和它的儿子们，除了<code>RuntimeException</code> 一支，都叫作<code>Checked Exception</code>，我还能用catch令牌来对抗他们的攻击！包括空指针，以后我就不怕他们了！</p><p>可是，他为什么要给我，看他刚才的样子都想打我了，又突然给了我这些？还有他一直在说的规则之力又是什么？这座城市为什么又这么诡异？</p><blockquote><p>转载链接：https://mp.weixin.qq.com/s/PDfd8HRtDZafXl47BCxyGg</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/exception/npe.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path 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class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java空指针NullPointerException的传说</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 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aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 13 分钟</span><meta property="timeRequired" content="PT13M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="java空指针nullpointerexception的传说" tabindex="-1"><a class="header-anchor" href="#java空指针nullpointerexception的传说" aria-hidden="true">#</a> Java空指针NullPointerException的传说</h1><p><strong>空指针</strong>，号称天下最强刺客。</p><p>他原本不叫这个名字，空指针原本复姓<strong>异常</strong>，空指针只不过是他的武器，但他杀戮过多，渐渐地人们只记住了空指针这三个字。</p><p>天下武功，唯快不破，空指针的针，以快和诡异著称，稍有不慎，便是伤亡。</p><p>... ...</p><p>我叫铁柱，我来到这个奇怪的世界已经一年了，我等了一年，穿越附赠的老爷爷、戒指、系统什么的我到现在都没发现。</p><p>而且这个世界看起来也太奇怪了，这里好像叫什么 <strong>Java</strong> 大陆，我只知道这个世界的最强者叫做 <strong>Object</strong>，听说是什么道祖级的存在，我也不知道是什么意思，毕竟我现在好像还是个菜鸡，别的主角一年都应该要飞升仙界了吧，我还连个小火球都放不出来。</p><p>哦，对了，上面的那段话是我在茶馆喝茶的时候听说书的先生说的，总觉得空指针这个名字怪怪的，好像在什么地方听说过。</p><p>我的头痛的毛病又犯了，我已经记不起来我为什么来到这里了，我只记得我的名字叫铁柱，其他的，我只感觉这个奇怪的世界有一种熟悉，但是我什么都记不起来了。</p><p>算了，得过且过吧。</p><p>我准备去找空指针了，虽然听说他很可怕，但是好像听说他不是嗜杀之人，应该不会滥杀无辜吧，目前为止，我也只对这三个字有熟悉的感觉了，我一定要找到他，找回我的记忆！</p><p>我打听了很久，原来空指针是<strong>异常组织</strong>的三代嫡传，异常组织是这个世界上最恐怖的杀手组织，空指针就是异常现在最出色的刺客。</p><p>听说空指针出生的时候，脖子上就挂着一根针，整个 Java 大陆雪下一月不停，Linux 森林多块陆地直接沉陷，于是他的父亲 <strong>RuntimeException</strong> 就给他起了空指针这个名字。</p><p>空指针出生的天生异象也引起了异常组织高层的注意，听说他的祖父 <strong>Exception</strong>，还有整个异常组织的领军人物 <strong>Throwable</strong> 都亲自接见了空指针，并且认为空指针天赋异禀，未来可期。</p><p>要知道，<strong>Throwable</strong> 可是 <strong>Object</strong> 亲自任命的异常组织头领。作为 Object 最值得信任的亲信，跟随 Object 万年以来，所有的脏活累活都依靠 Thrwoable 创立的异常组织来处理，真可谓一人之下，万人之上。</p><p>Throwable 只有两个亲子，就是 Error 和 Exception，传说中 Error 心狠手辣，手下无一活口，见过 Error 的人还能活下来的寥寥无几。</p><p>整个大陆只有他们恐怖的传说，谁也不知道他们什么时候出现，但是一旦他们出现，基本宣告着你已经是个死人了。</p><p>而我听说过最恐怖的就是<code>OutOfMemoryError</code> 和 <code>StackOverflowError</code> 这两位刺客，因为大陆上永远有一座风云榜悬挂在帝都门口，而这两位，一直位居杀手榜榜首位置，空指针也只只能屈居第三而已。当然，大陆不少人都认为空指针会后来居上。</p><p>我的消息只是打听到这么多，接下来的日子，我走过无数的城市、荒野，我穿过沙漠、丛林，这一天，终于，我来到了大陆的帝都--<strong>堆</strong>。</p><p>这个名字听起来也有点耳熟，不管他，先进城再说。</p><p>进城后我发现这里非常诡异，整座城市好像都非常年轻，好像连一个成年人都没有！街道上熙熙攘攘竟然都是年轻人。</p><p>带着疑惑，我走进了一家叫做<em>同福客栈</em>的酒楼。</p><p>”客官，打尖还是住店啊？“一个小二模样的<em>小孩</em>带着一丝谄媚的对我说。</p><p>”住店，带我去最好的房间，这些钱先押你这里，不够再跟我要。“一路走来，对于这些地方的行情我也算轻车熟路了。</p><p>”小朋友，这里是怎么回事？你们这里没有大人吗？“我一边走一边问这个只有我一半身高的小孩，根据我目测，他身高不超过1米，应该还只有七八岁的样子，难道这里的商人如此黑心，竟然雇佣童工，不过这也不貌似不对，因为周围的客人好像也都是这般年纪，他们竟然还有在抽烟喝酒的！</p><p>”客官可真幽默，不过我看客官应该是刚来帝都，不瞒您说，整个帝都就基本没有超过15岁的人，超过15的据说都在叫做老年区的养老去了！就拿我来说吧，我今年可不小了，我都8岁了，像我这般年纪的已经半截腿迈进棺材咯。哎，这身子也是一年不如一年了。“</p><p>看着这个小二一脸认真的样子，我越发觉得这座城市诡异起来了！8岁，什么鬼？8岁不是应该在家里看喜羊羊吗？！还半截腿迈进棺材！</p><p>”可是你看我比你高这么多，你不觉得奇怪吗？“我奇怪的问他。</p><p>”有什么好奇怪的，要不是我小时候喝多了三鹿，没准我也长这么高了！“小二有点生气的对我说。</p><p>行吧，再说两句把他激怒了，跳起来打我膝盖就大事不妙了。</p><p>接下来的几天，经过我的打探，原来我在的地方是叫做年轻区，整个帝都就只有这两个区域，年轻区的人年龄确实没有超过15岁的，有些人刚出生没几天就死了，对此，生活在这里的人也见怪不怪了。对于他们来说，寄希望能活到超过15岁进入老年区养老就是他们的梦想。</p><p>我在怀疑是不是异常组织在这里暗杀，可是发现结果并不是，这里的人貌似已经习惯了，生活对他们来说就是随便活活就好了，每次的死亡对于他们来说毫无征兆，可能刚踢着球呢，就突然挂了，有的上着厕所突然就死了，临死前连个屁股都没擦，不说了，有点恶心。</p><p>就在我等的不耐烦想打算去老年区看看的时候，一个穿着黑衣的人找到了我。</p><p>”你是谁？“我警惕的问他。</p><p>”本座IOException。“黑衣人神情冰冷的看着我说。</p><p>”你找我什么事？“</p><p>”这些你不用知道，跟我走一趟吧！“</p><p>我刚想说话拒绝，开什么玩笑，跟你们异常组打交道的人非死即残，谁要跟你去。</p><p>但是由不得我拒绝，我只感觉一阵天旋地转，我感觉我在天上飞，然后我就失去了意识。当我醒来的时候，我发现我躺在一张巨大的床上，桌子上点着一支檀香，整个房间只有一张桌子、一把椅子和我躺的地方。</p><p>房间很小，应该只有10几个平方，但是我竟然又有一种熟悉的感觉，这种感觉萦绕在我心头挥散不去。</p><p>没等我再想更多，房门打开了。</p><p>”是你，你把我带来干什么？“</p><p>”走吧，有人要见你。“</p><p>还是不容我抗拒，如果我的战斗力是5的话，我想，IO他该有好几万了吧。</p><p>又是这该死的眩晕感，不过这次没有几秒钟，我就发现我在一个花园里，花园中间一个身穿黄袍的中年人正在慢悠悠的喝茶。在他身上我感受不到任何强大的气息，甚至不如IOException给我的压迫感强烈。这是谁？</p><p>不等我思绪飘飞，IOException弯腰躬身说道：”陛下，人带过来了。“</p><p>”嗯，你退下吧。“中年人转过身来，脸上丝毫看不出情绪的说道。</p><p>我大概猜到了这是哪里了，于是也放下心来，在这里，或许能找到我的答案。</p><p>反正他要对我怎么样，我也没有办法反抗，我径直坐到他的对面，看着他说：”您就是Object陛下吧，不知找我所谓何事？“</p><p>中年人也不在意，没有正面回答我的问题，反而略带一丝调侃的说道：”不用咬文嚼字，说点正常人的话吧。“</p><p>... ...</p><p>这不按套路出牌啊，我这不是来久了，模仿你们古代人说话嘛，怎么还埋怨起我来了？！</p><p>”那我就直说了，我想知道空指针在哪里。“</p><p>”空指针就在皇宫轮值，你找他干嘛？“</p><p>”我暂时不能说“</p><p>”呵呵，你就不好奇我为什么知道你，为什么又把你带过来？“</p><p>”好奇，可是我就是不想问。“</p><p>Object喝了口茶，不紧不慢的回道：”年轻人有性格是好事，可是过刚易折的道理你应该明白。“</p><p>”我不明白，我在这里反正也没看见什么老人，当然，除了你。“我理所当然的认为这肯定是Object搞得鬼，整个帝都都是小朋友，要是没有猫腻，骗鬼呢！</p><p>Object听到这话，皱了皱眉，他沉默了一会儿，缓缓站起身子走到一颗柳树下，背着手说道：“你不知道这一切是为什么吗？”</p><p>废话，我当然不知道了，我知道还能问你吗？！</p><p>又是沉默... ...这个气氛让我感觉很不舒服。就在我受不了想说话的时候，Object突然说了一句：“带他去见空指针吧。”</p><p>“是，陛下！”突然，一个身穿红袍的枯瘦老者出现在我背后，把我吓了一跳。</p><p>我也不想再多生事端，直觉告诉我这里不是久留之地，虽然有点莫名其妙，我还是跟着红袍老者来走了。</p><p>... ...</p><p>“陛下，是他吗？”一个光头大汉的身影在半空若影若现的说道。</p><p>“还不能确定... 不过，留给我们的时间不多了，下一次的轮回就快来了。”</p><p>“轮回，又是轮回。我们还有希望吗？”大汉呢喃着，不知道是对自己说还是对中年人说。</p><p>中年人依然背着手，抬头望着漫天的柳絮说道：“这一世，该是个了断了。”</p><p>... ...</p><p>没多久，他把我带到一个房间门口，也是面无表情的说道：“进去吧，空指针就在里面。”</p><p>我挺住脚步，转过身问他：“你是谁？我们是不是见过？”</p><p>红袍老者怪异一笑：“也许吧，老夫<code>IndexOutOfBoundsException</code>，空指针便是我好友。”</p><p>这个名字可真长，我听说过他，据传闻他的实力也非常之强，可能不下于空指针，都是以诡异的出手角度著称，不过相比于空指针的大名，他好像更低调，难怪在皇宫当个老太监一般。</p><p>我也不在多想，点点头，走进了房间。刚进房间，我就看见一个一身白衣的身影背对着我，笔直的身影好像要冲破天际，身上的气势强大无比，至少在我见过的所有人里足以排进前三了。空指针，果然名不虚传！</p><p>我走到房间中央，环目四望才发现这好像是一座祠堂的样子，就在我还在打量四周之际，一道清冷的声音传到我的耳边：</p><p>“你身上的气息让我非常讨厌！”</p><p>他转过身来，我发现我根本看不清空指针长什么样子，他的脸好像打上了马赛克。听到他的话，我心里的疑惑更多了，我只是觉得他的气息让我感到非常熟悉，他的话让我有点莫名其妙。于是我试探道：</p><p>“你知道我是谁？”</p><p>听到我的话，他一步步走进我，在我身边闻了闻，这让我什么一紧，虽然我想搞清楚我身上的问题，但是我不是出卖肉体的人，我退后一步说：</p><p>“你想干嘛？”</p><p>空指针皱紧了眉头，仿佛自言自语道：“不对，不对，这是... 规则的气息？可是他明明身上没有任何能量波动。”</p><p>我见他好像魔怔了，仿佛在思考什么，于是迈步走到他刚才站立的地方看着前面，原来，这是他们的族谱！这里是异常的祠堂！</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/exception/npe-1.jpg" alt=""></p><p>看完这张族谱，我恍然大悟，好像明白了什么。突然，我的脑袋里出现了一个冰冷的机器声音：“获取异常族谱，历练完成度+100。”</p><p>我Kao，系统，这是系统啊，我不禁内牛满面，啥任务系统啊，一点提示都没有，我赶紧喊道：</p><p>“系统，系统，还在吗？在线等，挺着急的。”可是没有任何回复！这啥破系统！就在我想破口大骂的时候，空指针看到我和个二傻子似的大呼小叫，突然一脸不可思议的对着我说：</p><p>“你明悟了规则？”</p><p>我愣了愣，嗯？难道我不是战5渣了？规则之力？好像是很高端的样子啊？</p><p>“撒豆成兵！”</p><p>“呼风！”</p><p>”唤雨！“</p><p>”临兵斗者皆阵列在前！“</p><p>一点反应都没有。。。啥玩意儿？还规则之力？九字真言都没用啊？</p><p>空指针好像都蒙了，他敲了敲太阳穴，无语的看着我说：</p><p>”你不是来找我的吗？说完你的问题，然后给我滚！“</p><p>对啊，这系统把我整的我都忘记我来干嘛的了，我赶紧说：</p><p>”你认识我对不对，你是不是觉得我有一种熟悉的感觉？我想知道我的来历！“</p><p>空指针又愣了愣，他看着我，沉默了一会儿，回道：“不知道！”</p><p>我有点奇怪，看他一脸便秘的表情应该是见过我的，他一定在撒谎，既然如此...</p><p>“那你告诉我你们有什么办法能在你们异常的攻击下防身吧？”</p><p>空指针大怒，刚想起身说话，空中突然传来一道声音：答应他的要求！</p><p>他冷哼一声，丢给我一本书，上面写着<strong>catch</strong>一个字，还有一块写着<strong>catch</strong>的令牌，冰冷的说到：“你想知道的都在这里了。”说完，拂袖而去。</p><p>我看着桌子上的这本书，想了想还是翻阅起来。</p><p>原来<code>Exception</code> 和它的儿子们，除了<code>RuntimeException</code> 一支，都叫作<code>Checked Exception</code>，我还能用catch令牌来对抗他们的攻击！包括空指针，以后我就不怕他们了！</p><p>可是，他为什么要给我，看他刚才的样子都想打我了，又突然给了我这些？还有他一直在说的规则之力又是什么？这座城市为什么又这么诡异？</p><blockquote><p>转载链接：https://mp.weixin.qq.com/s/PDfd8HRtDZafXl47BCxyGg</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/exception/npe.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path 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class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java异常处理的20个最佳实践</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 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0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><meta property="articleSection" content="Java核心"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 4 分钟</span><meta property="timeRequired" content="PT4M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="java异常处理的20个最佳实践" tabindex="-1"><a class="header-anchor" href="#java异常处理的20个最佳实践" aria-hidden="true">#</a> Java异常处理的20个最佳实践</h1><p>“三妹啊，今天我来给你传授几个异常处理的最佳实践经验，以免你以后在开发中采坑。”我面带着微笑对三妹说。</p><p>“好啊，二哥，我洗耳恭听。”三妹也微微一笑，欣然接受。</p><p>“好，那哥就不废话了。开整。”</p><hr><p><strong>1）尽量不要捕获 RuntimeException</strong></p><p>阿里出品的嵩山版 Java 开发手册上这样规定：</p><blockquote><p>尽量不要 catch RuntimeException，比如 NullPointerException、IndexOutOfBoundsException 等等，应该用预检查的方式来规避。</p></blockquote><p>正例：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">if</span> <span class="token punctuation">(</span>obj <span class="token operator">!=</span> <span class="token keyword">null</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
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clickable"><!----><span class="title">2.1 Java概述</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.2 Java基础语法</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.3 面向对象编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.4 字符串&amp;数组</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.5 集合框架（容器）</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.6 IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">2.7 异常处理</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/exception/gailan.html" class="nav-link sidebar-link sidebar-page" aria-label="概览"><!---->概览<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/exception/try-with-resouces.html" class="nav-link sidebar-link sidebar-page" aria-label="try-with-resouces"><!---->try-with-resouces<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/exception/shijian.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="最佳实践"><!---->最佳实践<!----></a><ul 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class="title">2.11 并发编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java异常处理的20个最佳实践</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 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aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 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aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 4 分钟</span><meta property="timeRequired" content="PT4M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="java异常处理的20个最佳实践" tabindex="-1"><a class="header-anchor" href="#java异常处理的20个最佳实践" aria-hidden="true">#</a> Java异常处理的20个最佳实践</h1><p>“三妹啊，今天我来给你传授几个异常处理的最佳实践经验，以免你以后在开发中采坑。”我面带着微笑对三妹说。</p><p>“好啊，二哥，我洗耳恭听。”三妹也微微一笑，欣然接受。</p><p>“好，那哥就不废话了。开整。”</p><hr><p><strong>1）尽量不要捕获 RuntimeException</strong></p><p>阿里出品的嵩山版 Java 开发手册上这样规定：</p><blockquote><p>尽量不要 catch RuntimeException，比如 NullPointerException、IndexOutOfBoundsException 等等，应该用预检查的方式来规避。</p></blockquote><p>正例：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">if</span> <span class="token punctuation">(</span>obj <span class="token operator">!=</span> <span class="token keyword">null</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
   <span class="token comment">//...</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>反例：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">try</span> <span class="token punctuation">{</span> 
@@ -126,6 +126,6 @@
     <span class="token punctuation">}</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>“哦，确实啊，try 块中 x 返回的值为 1，到了 finally 块中就返回 2 了。”三妹说。</p><p>“是这样的。”我点点头。</p><hr><p>“好了，三妹，关于异常处理实践就先讲这 6 条吧，实际开发中你还会碰到其他的一些坑，自己踩一踩可能印象更深刻一些。”我说。</p><p>“那万一到时候我工作后被领导骂了怎么办？”三妹委屈地说。</p><p>“新人嘛，总要写几个 bug 才能对得起新人这个称号嘛。”我轻描淡写地说。</p><p>“好吧。”三妹无奈地叹了口气。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/exception/shijian.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/14 上午7:14:28</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/exception/try-with-resouces.html" class="nav-link prev" aria-label="try-with-resouces"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->try-with-resouces</div></a><a href="/exception/npe.html" class="nav-link next" aria-label="NullPointerException"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">NullPointerException<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 5 分钟</span><meta property="timeRequired" content="PT5M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="详解java7新增的try-with-resouces语法" tabindex="-1"><a class="header-anchor" href="#详解java7新增的try-with-resouces语法" aria-hidden="true">#</a> 详解Java7新增的try-with-resouces语法</h1><p>“二哥，终于等到你讲 try-with-resouces 了！”三妹夸张的表情让我有些吃惊。</p><p>“三妹，不要激动呀！开讲之前，我们还是要来回顾一下 try–catch-finally，好做个铺垫。”我说，“来看看这段代码吧。”</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">TrycatchfinallyDecoder</span> <span class="token punctuation">{</span>
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data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 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15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 5 分钟</span><meta property="timeRequired" content="PT5M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="详解java7新增的try-with-resouces语法" tabindex="-1"><a class="header-anchor" href="#详解java7新增的try-with-resouces语法" aria-hidden="true">#</a> 详解Java7新增的try-with-resouces语法</h1><p>“二哥，终于等到你讲 try-with-resouces 了！”三妹夸张的表情让我有些吃惊。</p><p>“三妹，不要激动呀！开讲之前，我们还是要来回顾一下 try–catch-finally，好做个铺垫。”我说，“来看看这段代码吧。”</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">TrycatchfinallyDecoder</span> <span class="token punctuation">{</span>
     <span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">void</span> <span class="token function">main</span><span class="token punctuation">(</span><span class="token class-name">String</span><span class="token punctuation">[</span><span class="token punctuation">]</span> args<span class="token punctuation">)</span> <span class="token punctuation">{</span>
         <span class="token class-name">BufferedReader</span> br <span class="token operator">=</span> <span class="token keyword">null</span><span class="token punctuation">;</span>
         <span class="token keyword">try</span> <span class="token punctuation">{</span>
@@ -218,6 +218,6 @@
 		at com.cmower.dzone.trycatchfinally.MyResourceOutThrow.close(TrywithresourcesCustomOutThrow.java:16)
 		at com.cmower.dzone.trycatchfinally.TrywithresourcesCustomOutThrow.main(TrywithresourcesCustomOutThrow.java:5)
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>“瞧，这次不会了，<code>out()</code> 的异常堆栈信息打印出来了，并且 <code>close()</code> 方法的堆栈信息上加了一个关键字 <code>Suppressed</code>，一目了然。”</p><p>“三妹，怎么样？是不是感觉 try-with-resouces 好用多了！我来简单总结下哈，在处理必须关闭的资源时，始终有限考虑使用 try-with-resources，而不是 try–catch-finally。前者产生的代码更加简洁、清晰，产生的异常信息也更靠谱。”</p><p>“靠谱！”三妹说。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/exception/try-with-resouces.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/14 上午7:14:28</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/exception/gailan.html" class="nav-link prev" aria-label="概览"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->概览</div></a><a href="/exception/shijian.html" class="nav-link next" aria-label="最佳实践"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">最佳实践<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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aria-label="4、代码提交"><!---->4、代码提交<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/git/git-qiyuan.html#_5、分支" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="5、分支"><!---->5、分支<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/git/git-qiyuan.html#_6、标签" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="6、标签"><!---->6、标签<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/git/git-qiyuan.html#_7、查看信息" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="7、查看信息"><!---->7、查看信息<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/git/git-qiyuan.html#_8、远程同步" class="router-link-active router-link-exact-active nav-link 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class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="1、主分支Master"><!---->1、主分支Master<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/git/git-qiyuan.html#_2、开发分支develop" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="2、开发分支Develop"><!---->2、开发分支Develop<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/git/git-qiyuan.html#_3、临时性分支" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="3、临时性分支"><!---->3、临时性分支<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/git/git-qiyuan.html#七、git-实战" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="七、Git 实战"><!---->七、Git 实战<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/git/git-qiyuan.html#_1、创建仓库" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="1、创建仓库"><!---->1、创建仓库<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/git/git-qiyuan.html#_2、版本回滚" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="2、版本回滚"><!---->2、版本回滚<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/git/git-qiyuan.html#_3、工作区和暂存区的区别" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="3、工作区和暂存区的区别"><!---->3、工作区和暂存区的区别<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/git/git-qiyuan.html#_4、撤销修改" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="4、撤销修改"><!---->4、撤销修改<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/git/git-qiyuan.html#_5、远程仓库" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="5、远程仓库"><!---->5、远程仓库<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/git/git-qiyuan.html#八、详解-sparse-checkout-命令" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="八、详解 sparse-checkout 命令"><!---->八、详解 sparse-checkout 命令<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/git/git-qiyuan.html#_1、使用-git-中遇到的一个大麻烦" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="1、使用 Git 中遇到的一个大麻烦"><!---->1、使用 Git 中遇到的一个大麻烦<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/git/git-qiyuan.html#_2、学习-git-中遇到的一个大惊喜" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="2、学习 Git 中遇到的一个大惊喜"><!---->2、学习 Git 中遇到的一个大惊喜<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/git/git-qiyuan.html#_3、使用-git-后的一点心里话" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="3、使用 Git 后的一点心里话"><!---->3、使用 Git 后的一点心里话<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li></ul><!--]--></li><li><!--[--><a href="/nginx/nginx.html" class="nav-link sidebar-link sidebar-page" aria-label="Nginx"><!---->Nginx<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.2 IDE/编辑器</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.3 Spring</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.4 SpringBoot</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.5 辅助工具</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.6 开源轮子</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.7 分布式</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.8 消息队列</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->我在工作中是如何使用 Git 的</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2021年11月26日</span><meta property="datePublished" content="2021-11-26T01:04:05.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category5" role>Java企业级开发</li><meta property="articleSection" content="Java企业级开发"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag1" role>Git</li></ul><meta property="keywords" content="Git"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 43 分钟</span><meta property="timeRequired" content="PT43M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/git/git-qiyuan.html#一、git-起源" class="router-link-active router-link-exact-active toc-link level2">一、Git 起源</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/git/git-qiyuan.html#二、git-安装" class="router-link-active router-link-exact-active toc-link level2">二、Git 安装</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/git/git-qiyuan.html#三、git-的数据模型" class="router-link-active router-link-exact-active toc-link level2">三、Git 的数据模型</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/git/git-qiyuan.html#快照" class="router-link-active router-link-exact-active toc-link level3">快照</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/git/git-qiyuan.html#历史记录建模-关联快照" class="router-link-active router-link-exact-active toc-link level3">历史记录建模：关联快照</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/git/git-qiyuan.html#数据模型及其伪代码表示" class="router-link-active router-link-exact-active toc-link level3">数据模型及其伪代码表示</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/git/git-qiyuan.html#对象和内存寻址" class="router-link-active router-link-exact-active toc-link level3">对象和内存寻址</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/git/git-qiyuan.html#引用" class="router-link-active router-link-exact-active toc-link level3">引用</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/git/git-qiyuan.html#仓库" class="router-link-active router-link-exact-active toc-link level3">仓库</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/git/git-qiyuan.html#四、git-的内容实现" class="router-link-active router-link-exact-active toc-link level2">四、Git 的内容实现</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/git/git-qiyuan.html#五、git-的-60-个常用命令" class="router-link-active router-link-exact-active toc-link level2">五、Git 的 60 个常用命令</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/git/git-qiyuan.html#_1、新建代码库" class="router-link-active router-link-exact-active toc-link level3">1、新建代码库</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/git/git-qiyuan.html#_2、配置" class="router-link-active router-link-exact-active toc-link level3">2、配置</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/git/git-qiyuan.html#_3、增加-删除文件" class="router-link-active router-link-exact-active toc-link level3">3、增加/删除文件</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/git/git-qiyuan.html#_4、代码提交" class="router-link-active router-link-exact-active toc-link level3">4、代码提交</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/git/git-qiyuan.html#_5、分支" class="router-link-active router-link-exact-active toc-link level3">5、分支</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/git/git-qiyuan.html#_6、标签" class="router-link-active router-link-exact-active toc-link level3">6、标签</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/git/git-qiyuan.html#_7、查看信息" class="router-link-active router-link-exact-active toc-link level3">7、查看信息</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/git/git-qiyuan.html#_8、远程同步" class="router-link-active router-link-exact-active toc-link level3">8、远程同步</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/git/git-qiyuan.html#_9、撤销" class="router-link-active router-link-exact-active toc-link level3">9、撤销</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/git/git-qiyuan.html#_10、其他" class="router-link-active router-link-exact-active toc-link level3">10、其他</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/git/git-qiyuan.html#六、图解-git-分支" class="router-link-active router-link-exact-active toc-link level2">六、图解 Git 分支</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/git/git-qiyuan.html#_1、主分支master" class="router-link-active router-link-exact-active toc-link level3">1、主分支Master</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/git/git-qiyuan.html#_2、开发分支develop" class="router-link-active router-link-exact-active toc-link level3">2、开发分支Develop</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/git/git-qiyuan.html#_3、临时性分支" class="router-link-active router-link-exact-active toc-link level3">3、临时性分支</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/git/git-qiyuan.html#七、git-实战" class="router-link-active router-link-exact-active toc-link level2">七、Git 实战</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/git/git-qiyuan.html#_1、创建仓库" class="router-link-active router-link-exact-active toc-link level3">1、创建仓库</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/git/git-qiyuan.html#_2、版本回滚" class="router-link-active router-link-exact-active toc-link level3">2、版本回滚</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/git/git-qiyuan.html#_3、工作区和暂存区的区别" class="router-link-active router-link-exact-active toc-link level3">3、工作区和暂存区的区别</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/git/git-qiyuan.html#_4、撤销修改" class="router-link-active router-link-exact-active toc-link level3">4、撤销修改</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/git/git-qiyuan.html#_5、远程仓库" class="router-link-active router-link-exact-active toc-link level3">5、远程仓库</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/git/git-qiyuan.html#八、详解-sparse-checkout-命令" class="router-link-active router-link-exact-active toc-link level2">八、详解 sparse-checkout 命令</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/git/git-qiyuan.html#_1、使用-git-中遇到的一个大麻烦" class="router-link-active router-link-exact-active toc-link level3">1、使用 Git 中遇到的一个大麻烦</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/git/git-qiyuan.html#_2、学习-git-中遇到的一个大惊喜" class="router-link-active router-link-exact-active toc-link level3">2、学习 Git 中遇到的一个大惊喜</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/git/git-qiyuan.html#_3、使用-git-后的一点心里话" class="router-link-active router-link-exact-active toc-link level3">3、使用 Git 后的一点心里话</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="我在工作中是如何使用-git-的" tabindex="-1"><a class="header-anchor" href="#我在工作中是如何使用-git-的" aria-hidden="true">#</a> 我在工作中是如何使用 Git 的</h1><h2 id="一、git-起源" tabindex="-1"><a class="header-anchor" href="#一、git-起源" aria-hidden="true">#</a> 一、Git 起源</h2><p>Git 是一个分布式版本控制系统，缔造者是大名鼎鼎的林纳斯·托瓦茲 (Linus Torvalds)，Git 最初的目的是为了能更好的管理 Linux 内核源码。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/git/git-qiyuan-01.png" alt=""></p><p>PS：<strong>为了能够帮助更多的 Java 爱好者，已将《Java 程序员进阶之路》开源到了 GitHub（本篇已收录）。如果你也喜欢这个专栏，觉得有帮助的话，可以去点个 star，这样也方便以后进行更系统化的学习</strong>：</p><p><a href="https://github.com/itwanger/toBeBetterJavaer" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/toBeBetterJavaer<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><p><em>每天看着 star 数的上涨我心里非常的开心，希望越来越多的 Java 爱好者能因为这个开源项目而受益，而越来越多人的 star，也会激励我继续更新下去</em>~</p><p>大家都知道，Linux 内核是开源的，参与者众多，到目前为止，共有两万多名开发者给 Linux Kernel 提交过代码。</p><p>但在 1991 年到 2002 年期间，Linus 作为项目的管理员并没有借助任何配置管理工具，而是以手工方式通过 patch 来合并大家提交的代码。</p><p>倒不是说 Linus 喜欢手工处理，而是因为他对代码版本管理工具非常挑剔，无论是商用的 clearcase，还是开源的 CVS、SVN 都入不了他的法眼。</p><p>直到 2002 年，Linus 才相中了一款分布式版本控制系统 BitKeeper，虽然是商用的，但 BitKeeper 愿意让 Linux 社区免费使用，这让 Linus 非常开心和满意。</p><p>时间来到 2005 年，由于 BitKeeper 提供的默认接口不能满足 Linux 社区用户的全部需要，一位开发者在未经允许的情况下反编译了 BitKeeper 并利用了未公开的接口，于是 BitKeeper 的著作权拥有者拉里·麦沃伊就气愤地收回了 Linux 社区免费使用的权力。</p><p>没办法，Linus 只好自己硬着头皮上了。他对新的版本控制系统制订了若干目标：</p><ul><li>速度</li><li>设计简单</li><li>允许成千上万个并行开发的分支</li><li>完全分布式</li><li>有能力高效管理类似 Linux 内核一样的超大规模项目</li></ul><p>结果，令人意想不到的是，Linus 只用了 10 天时间就用 C语言完成了第一个版本，嗯。。神就是神。并且给这个版本起了一个略带嘲讽意味的名字——Git（在英式英语俚语中表示“不愉快的人”）。</p><p>源代码的自述文件有进一步的阐述：</p><blockquote><p>The name &quot;git&quot; was given by Linus Torvalds when he wrote the very first version. He described the tool as &quot;the stupid content tracker&quot; and the name as (depending on your way)</p></blockquote><p>从 Git 的设计上来看，有两种命令：分别是底层命令(Plumbing commands)和高层命令(Porcelain commands)。一开始，Linus 只设计了一些给开源社区的黑客们使用的符合 Unix KISS 原则的命令，因为黑客们本身就是动手高手，水管坏了就撸起袖子去修理，因此这些命令被称为 plumbing commands。</p><p>Linus 在提交了第一个 git commit 后，就向社区发布了 git 工具。当时，社区中有位叫 Junio Hamano 的开发者觉得这个工具很有意思，便下载了代码，结果发现一共才 1244 行代码，这更令他惊奇，也引发了极大的兴趣。Junio 在邮件列表与 Linus 交流并帮助增加了 merge 等功能，而后持续打磨 git，最后 Junio 完全接手了 Git 的维护工作，Linus 则回去继续维护 Linux Kernel 项目。</p><p>Junio Hamano 觉得 Linus 设计的这些命令对于普通用户不太友好，因此在此之上，封装了更易于使用、接口更精美的高层命令，也就是我们今天每天使用的 git add, git commit 之类。Git add 就是封装了 update-cache 命令，而 git commit 就是封装了 write-tree, commit-tree 命令。</p><p>如果选历史上最伟大的一次 Git 代码提交，那一定是这 Git 工具项目本身的第一次代码提交。这次代码提交无疑是开创性的，<strong>如果说 Linux 项目促成了开源软件的成功并改写了软件行业的格局，那么 Git 则是改变了全世界开发者的工作方式和写作方式</strong>。</p><p>如今，Git 已经成为全球软件开发者的标配。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/git/git-qiyuan-02.png" alt=""></p><p>原本的 Git 只适用于 Unix/Linux 平台，但随着 Cygwin、msysGit 环境的成熟，以及 TortoiseGit 这样易用的GUI工具，Git 在 Windows 平台下也逐渐成熟。</p><blockquote><p>PS1：Cygwin 的主要目的是通过重新编译，将 POSIX 系统（例如Linux、BSD，以及其他Unix系统）上的软件移植到Windows上。</p></blockquote><blockquote><p>PS2：msysGit 前面的 4 个字幕来源于 MSYS 项目，而 MSYS 又源于 MinGW（Minimalist GNU for Windows，最简GNU工具集），通过增加了一个由bash提供的shell环境以及其他相关工具软件，组成了一个最简系统（Minimal System），利用MinGW提供的工具，以及Git针对MinGW的一个分支版本，可以在Windows平台为Git编译出一个原生应用，结合MSYS就组成了msysGit。</p></blockquote><p>Git 和传统的版本控制工具 CVS、SVN 有不小的区别，前者关心的是文件的整体性是否发生了改变，后两者更关心文件内容上的差异。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/git/git-qiyuan-03.png" alt=""></p><p>除此之外，Git 更像是一个文件系统，每个使用它的主机都可以作为版本库，并且不依赖于远程仓库而离线工作。开发者在本地就有历史版本的副本，因此就不用再被远程仓库的网络传输而束缚。</p><p>Git 中的绝大多数操作都只需要访问本地文件和资源，一般不需要来自网络上其它计算机的信息。因为在本地磁盘上就有项目的完整历史，所以 Git 的大部分操作看起来就像是在瞬间完成的。</p><p>在多人协作的情况下，Git 可以将本地仓库复制给其他开发者，那些发生改变的文件可以作为新增的分支被导入，再与本地仓库的进行分支合并。</p><p>如果你希望后面的学习更顺利，请记住 Git 这三种状态：</p><ul><li>已提交（committed），表示数据已经安全的保存在本地数据库中</li><li>已修改（modified），表示修改了文件，但还没保存到数据库中</li><li>已暂存（staged），表示对一个已修改文件的当前版本做了标记，使之包含在下次提交的快照中</li></ul><p>由此引入了 Git 的三个工作区域：</p><ul><li>Git 仓库，用来保存项目的元数据和对象数据库</li><li>工作目录，对项目的某个版本进行独立提取</li><li>暂存区域，保存了下次将提交的文件列表信息，也可以叫“索引”</li></ul><p>Git 的工作流程是这样的：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/git/git-qiyuan-04.png" alt=""></p><ul><li>在工作目录中修改文件</li><li>暂存文件，将文件的快照放入暂存区域</li><li>提交更新，找到暂存区域的文件，将快照永久性存储到 Git 仓库目录</li></ul><h2 id="二、git-安装" tabindex="-1"><a class="header-anchor" href="#二、git-安装" aria-hidden="true">#</a> 二、Git 安装</h2><p>接下来，我们来看一下 <strong>Git 的安装</strong>，Linux 和 Windows 系统的安装大家可以到 Git 官网上查看安装方法，上面讲的非常详细。</p><blockquote><p>https://git-scm.com/downloads</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/git/git-qiyuan-05.png" alt=""></p><p>我个人使用的 macOS 系统，可以直接使用 <code>brew install git</code> 命令安装，非常方便。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/git/git-qiyuan-06.png" alt=""></p><p>安装成功后，再使用 <code>git --version</code> 就可以查看版本号了，我本机上安装的是 2.23.0 版本。</p><h2 id="三、git-的数据模型" tabindex="-1"><a class="header-anchor" href="#三、git-的数据模型" aria-hidden="true">#</a> 三、Git 的数据模型</h2><p>尽管 Git 的接口有些难懂，但它底层的设计和思想却非常的优雅。难懂的接口只能靠死记硬背，但优雅的底层设计则非常容易理解。我们可以通过一种自底向上的方式来学习 Git，先了解底层的数据模型，再学习它的接口。可以这么说，一旦搞懂了 Git 的数据模型，再学习它的接口并理解这些接口是如何操作数据模型的就非常容易了。</p><p>进行版本控制的方法很多，Git 拥有一个精心设计的模型，这使其能够支持版本控制所需的所有特性，比如维护历史记录、支持分支和团队协作。</p><h3 id="快照" tabindex="-1"><a class="header-anchor" href="#快照" aria-hidden="true">#</a> 快照</h3><p>Git 将顶级目录中的文件和文件夹称作集合，并通过一系列快照来管理历史记录。在 Git 的术语中，文件被称为 blob 对象（数据对象），也就是一组数据。目录则被称为 tree（树），目录中可以包含文件和子目录。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;root&gt; (tree)
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clickable active"><!----><span class="title">三、Java企业级开发</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">3.1 开发工具</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/maven/maven.html" class="nav-link sidebar-link sidebar-page" aria-label="Maven"><!---->Maven<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/git/git-qiyuan.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="Git"><!---->Git<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/git/git-qiyuan.html#一、git-起源" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="一、Git 起源"><!---->一、Git 起源<!----></a><ul 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aria-label="历史记录建模：关联快照"><!---->历史记录建模：关联快照<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/git/git-qiyuan.html#数据模型及其伪代码表示" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="数据模型及其伪代码表示"><!---->数据模型及其伪代码表示<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/git/git-qiyuan.html#对象和内存寻址" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="对象和内存寻址"><!---->对象和内存寻址<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/git/git-qiyuan.html#引用" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="引用"><!---->引用<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/git/git-qiyuan.html#仓库" class="router-link-active 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aria-current="page" href="/git/git-qiyuan.html#_2、配置" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="2、配置"><!---->2、配置<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/git/git-qiyuan.html#_3、增加-删除文件" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="3、增加/删除文件"><!---->3、增加/删除文件<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/git/git-qiyuan.html#_4、代码提交" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="4、代码提交"><!---->4、代码提交<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/git/git-qiyuan.html#_5、分支" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="5、分支"><!---->5、分支<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/git/git-qiyuan.html#_6、标签" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="6、标签"><!---->6、标签<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/git/git-qiyuan.html#_7、查看信息" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="7、查看信息"><!---->7、查看信息<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/git/git-qiyuan.html#_8、远程同步" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="8、远程同步"><!---->8、远程同步<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/git/git-qiyuan.html#_9、撤销" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="9、撤销"><!---->9、撤销<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/git/git-qiyuan.html#_10、其他" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="10、其他"><!---->10、其他<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/git/git-qiyuan.html#六、图解-git-分支" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="六、图解 Git 分支"><!---->六、图解 Git 分支<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/git/git-qiyuan.html#_1、主分支master" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="1、主分支Master"><!---->1、主分支Master<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/git/git-qiyuan.html#_2、开发分支develop" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="2、开发分支Develop"><!---->2、开发分支Develop<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/git/git-qiyuan.html#_3、临时性分支" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="3、临时性分支"><!---->3、临时性分支<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/git/git-qiyuan.html#七、git-实战" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="七、Git 实战"><!---->七、Git 实战<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/git/git-qiyuan.html#_1、创建仓库" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="1、创建仓库"><!---->1、创建仓库<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/git/git-qiyuan.html#_2、版本回滚" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="2、版本回滚"><!---->2、版本回滚<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/git/git-qiyuan.html#_3、工作区和暂存区的区别" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="3、工作区和暂存区的区别"><!---->3、工作区和暂存区的区别<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/git/git-qiyuan.html#_4、撤销修改" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="4、撤销修改"><!---->4、撤销修改<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/git/git-qiyuan.html#_5、远程仓库" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="5、远程仓库"><!---->5、远程仓库<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/git/git-qiyuan.html#八、详解-sparse-checkout-命令" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="八、详解 sparse-checkout 命令"><!---->八、详解 sparse-checkout 命令<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/git/git-qiyuan.html#_1、使用-git-中遇到的一个大麻烦" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="1、使用 Git 中遇到的一个大麻烦"><!---->1、使用 Git 中遇到的一个大麻烦<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/git/git-qiyuan.html#_2、学习-git-中遇到的一个大惊喜" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="2、学习 Git 中遇到的一个大惊喜"><!---->2、学习 Git 中遇到的一个大惊喜<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/git/git-qiyuan.html#_3、使用-git-后的一点心里话" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="3、使用 Git 后的一点心里话"><!---->3、使用 Git 后的一点心里话<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li></ul><!--]--></li><li><!--[--><a href="/nginx/nginx.html" class="nav-link sidebar-link sidebar-page" aria-label="Nginx"><!---->Nginx<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.2 IDE/编辑器</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.3 Spring</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.4 SpringBoot</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.5 辅助工具</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.6 开源轮子</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.7 分布式</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.8 消息队列</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->我在工作中是如何使用 Git 的</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2021年11月26日</span><meta property="datePublished" content="2021-11-26T01:04:05.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category5" role>Java企业级开发</li><meta property="articleSection" content="Java企业级开发"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag1" role>Git</li></ul><meta property="keywords" content="Git"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 43 分钟</span><meta property="timeRequired" content="PT43M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/git/git-qiyuan.html#一、git-起源" class="router-link-active router-link-exact-active toc-link level2">一、Git 起源</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/git/git-qiyuan.html#二、git-安装" class="router-link-active router-link-exact-active toc-link level2">二、Git 安装</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/git/git-qiyuan.html#三、git-的数据模型" class="router-link-active router-link-exact-active toc-link level2">三、Git 的数据模型</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/git/git-qiyuan.html#快照" class="router-link-active router-link-exact-active toc-link level3">快照</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/git/git-qiyuan.html#历史记录建模-关联快照" class="router-link-active router-link-exact-active toc-link level3">历史记录建模：关联快照</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/git/git-qiyuan.html#数据模型及其伪代码表示" class="router-link-active router-link-exact-active toc-link level3">数据模型及其伪代码表示</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/git/git-qiyuan.html#对象和内存寻址" class="router-link-active router-link-exact-active toc-link level3">对象和内存寻址</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/git/git-qiyuan.html#引用" class="router-link-active router-link-exact-active toc-link level3">引用</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/git/git-qiyuan.html#仓库" class="router-link-active router-link-exact-active toc-link level3">仓库</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/git/git-qiyuan.html#四、git-的内容实现" class="router-link-active router-link-exact-active toc-link level2">四、Git 的内容实现</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/git/git-qiyuan.html#五、git-的-60-个常用命令" class="router-link-active router-link-exact-active toc-link level2">五、Git 的 60 个常用命令</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/git/git-qiyuan.html#_1、新建代码库" class="router-link-active router-link-exact-active toc-link level3">1、新建代码库</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/git/git-qiyuan.html#_2、配置" class="router-link-active router-link-exact-active toc-link level3">2、配置</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/git/git-qiyuan.html#_3、增加-删除文件" class="router-link-active router-link-exact-active toc-link level3">3、增加/删除文件</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/git/git-qiyuan.html#_4、代码提交" class="router-link-active router-link-exact-active toc-link level3">4、代码提交</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/git/git-qiyuan.html#_5、分支" class="router-link-active router-link-exact-active toc-link level3">5、分支</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/git/git-qiyuan.html#_6、标签" class="router-link-active router-link-exact-active toc-link level3">6、标签</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/git/git-qiyuan.html#_7、查看信息" class="router-link-active router-link-exact-active toc-link level3">7、查看信息</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/git/git-qiyuan.html#_8、远程同步" class="router-link-active router-link-exact-active toc-link level3">8、远程同步</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/git/git-qiyuan.html#_9、撤销" class="router-link-active router-link-exact-active toc-link level3">9、撤销</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/git/git-qiyuan.html#_10、其他" class="router-link-active router-link-exact-active toc-link level3">10、其他</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/git/git-qiyuan.html#六、图解-git-分支" class="router-link-active router-link-exact-active toc-link level2">六、图解 Git 分支</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/git/git-qiyuan.html#_1、主分支master" class="router-link-active router-link-exact-active toc-link level3">1、主分支Master</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/git/git-qiyuan.html#_2、开发分支develop" class="router-link-active router-link-exact-active toc-link level3">2、开发分支Develop</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/git/git-qiyuan.html#_3、临时性分支" class="router-link-active router-link-exact-active toc-link level3">3、临时性分支</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/git/git-qiyuan.html#七、git-实战" class="router-link-active router-link-exact-active toc-link level2">七、Git 实战</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/git/git-qiyuan.html#_1、创建仓库" class="router-link-active router-link-exact-active toc-link level3">1、创建仓库</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/git/git-qiyuan.html#_2、版本回滚" class="router-link-active router-link-exact-active toc-link level3">2、版本回滚</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/git/git-qiyuan.html#_3、工作区和暂存区的区别" class="router-link-active router-link-exact-active toc-link level3">3、工作区和暂存区的区别</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/git/git-qiyuan.html#_4、撤销修改" class="router-link-active router-link-exact-active toc-link level3">4、撤销修改</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/git/git-qiyuan.html#_5、远程仓库" class="router-link-active router-link-exact-active toc-link level3">5、远程仓库</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/git/git-qiyuan.html#八、详解-sparse-checkout-命令" class="router-link-active router-link-exact-active toc-link level2">八、详解 sparse-checkout 命令</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/git/git-qiyuan.html#_1、使用-git-中遇到的一个大麻烦" class="router-link-active router-link-exact-active toc-link level3">1、使用 Git 中遇到的一个大麻烦</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/git/git-qiyuan.html#_2、学习-git-中遇到的一个大惊喜" class="router-link-active router-link-exact-active toc-link level3">2、学习 Git 中遇到的一个大惊喜</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/git/git-qiyuan.html#_3、使用-git-后的一点心里话" class="router-link-active router-link-exact-active toc-link level3">3、使用 Git 后的一点心里话</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="我在工作中是如何使用-git-的" tabindex="-1"><a class="header-anchor" href="#我在工作中是如何使用-git-的" aria-hidden="true">#</a> 我在工作中是如何使用 Git 的</h1><h2 id="一、git-起源" tabindex="-1"><a class="header-anchor" href="#一、git-起源" aria-hidden="true">#</a> 一、Git 起源</h2><p>Git 是一个分布式版本控制系统，缔造者是大名鼎鼎的林纳斯·托瓦茲 (Linus Torvalds)，Git 最初的目的是为了能更好的管理 Linux 内核源码。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/git/git-qiyuan-01.png" alt=""></p><p>PS：<strong>为了能够帮助更多的 Java 爱好者，已将《Java 程序员进阶之路》开源到了 GitHub（本篇已收录）。如果你也喜欢这个专栏，觉得有帮助的话，可以去点个 star，这样也方便以后进行更系统化的学习</strong>：</p><p><a href="https://github.com/itwanger/toBeBetterJavaer" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/toBeBetterJavaer<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><p><em>每天看着 star 数的上涨我心里非常的开心，希望越来越多的 Java 爱好者能因为这个开源项目而受益，而越来越多人的 star，也会激励我继续更新下去</em>~</p><p>大家都知道，Linux 内核是开源的，参与者众多，到目前为止，共有两万多名开发者给 Linux Kernel 提交过代码。</p><p>但在 1991 年到 2002 年期间，Linus 作为项目的管理员并没有借助任何配置管理工具，而是以手工方式通过 patch 来合并大家提交的代码。</p><p>倒不是说 Linus 喜欢手工处理，而是因为他对代码版本管理工具非常挑剔，无论是商用的 clearcase，还是开源的 CVS、SVN 都入不了他的法眼。</p><p>直到 2002 年，Linus 才相中了一款分布式版本控制系统 BitKeeper，虽然是商用的，但 BitKeeper 愿意让 Linux 社区免费使用，这让 Linus 非常开心和满意。</p><p>时间来到 2005 年，由于 BitKeeper 提供的默认接口不能满足 Linux 社区用户的全部需要，一位开发者在未经允许的情况下反编译了 BitKeeper 并利用了未公开的接口，于是 BitKeeper 的著作权拥有者拉里·麦沃伊就气愤地收回了 Linux 社区免费使用的权力。</p><p>没办法，Linus 只好自己硬着头皮上了。他对新的版本控制系统制订了若干目标：</p><ul><li>速度</li><li>设计简单</li><li>允许成千上万个并行开发的分支</li><li>完全分布式</li><li>有能力高效管理类似 Linux 内核一样的超大规模项目</li></ul><p>结果，令人意想不到的是，Linus 只用了 10 天时间就用 C语言完成了第一个版本，嗯。。神就是神。并且给这个版本起了一个略带嘲讽意味的名字——Git（在英式英语俚语中表示“不愉快的人”）。</p><p>源代码的自述文件有进一步的阐述：</p><blockquote><p>The name &quot;git&quot; was given by Linus Torvalds when he wrote the very first version. He described the tool as &quot;the stupid content tracker&quot; and the name as (depending on your way)</p></blockquote><p>从 Git 的设计上来看，有两种命令：分别是底层命令(Plumbing commands)和高层命令(Porcelain commands)。一开始，Linus 只设计了一些给开源社区的黑客们使用的符合 Unix KISS 原则的命令，因为黑客们本身就是动手高手，水管坏了就撸起袖子去修理，因此这些命令被称为 plumbing commands。</p><p>Linus 在提交了第一个 git commit 后，就向社区发布了 git 工具。当时，社区中有位叫 Junio Hamano 的开发者觉得这个工具很有意思，便下载了代码，结果发现一共才 1244 行代码，这更令他惊奇，也引发了极大的兴趣。Junio 在邮件列表与 Linus 交流并帮助增加了 merge 等功能，而后持续打磨 git，最后 Junio 完全接手了 Git 的维护工作，Linus 则回去继续维护 Linux Kernel 项目。</p><p>Junio Hamano 觉得 Linus 设计的这些命令对于普通用户不太友好，因此在此之上，封装了更易于使用、接口更精美的高层命令，也就是我们今天每天使用的 git add, git commit 之类。Git add 就是封装了 update-cache 命令，而 git commit 就是封装了 write-tree, commit-tree 命令。</p><p>如果选历史上最伟大的一次 Git 代码提交，那一定是这 Git 工具项目本身的第一次代码提交。这次代码提交无疑是开创性的，<strong>如果说 Linux 项目促成了开源软件的成功并改写了软件行业的格局，那么 Git 则是改变了全世界开发者的工作方式和写作方式</strong>。</p><p>如今，Git 已经成为全球软件开发者的标配。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/git/git-qiyuan-02.png" alt=""></p><p>原本的 Git 只适用于 Unix/Linux 平台，但随着 Cygwin、msysGit 环境的成熟，以及 TortoiseGit 这样易用的GUI工具，Git 在 Windows 平台下也逐渐成熟。</p><blockquote><p>PS1：Cygwin 的主要目的是通过重新编译，将 POSIX 系统（例如Linux、BSD，以及其他Unix系统）上的软件移植到Windows上。</p></blockquote><blockquote><p>PS2：msysGit 前面的 4 个字幕来源于 MSYS 项目，而 MSYS 又源于 MinGW（Minimalist GNU for Windows，最简GNU工具集），通过增加了一个由bash提供的shell环境以及其他相关工具软件，组成了一个最简系统（Minimal System），利用MinGW提供的工具，以及Git针对MinGW的一个分支版本，可以在Windows平台为Git编译出一个原生应用，结合MSYS就组成了msysGit。</p></blockquote><p>Git 和传统的版本控制工具 CVS、SVN 有不小的区别，前者关心的是文件的整体性是否发生了改变，后两者更关心文件内容上的差异。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/git/git-qiyuan-03.png" alt=""></p><p>除此之外，Git 更像是一个文件系统，每个使用它的主机都可以作为版本库，并且不依赖于远程仓库而离线工作。开发者在本地就有历史版本的副本，因此就不用再被远程仓库的网络传输而束缚。</p><p>Git 中的绝大多数操作都只需要访问本地文件和资源，一般不需要来自网络上其它计算机的信息。因为在本地磁盘上就有项目的完整历史，所以 Git 的大部分操作看起来就像是在瞬间完成的。</p><p>在多人协作的情况下，Git 可以将本地仓库复制给其他开发者，那些发生改变的文件可以作为新增的分支被导入，再与本地仓库的进行分支合并。</p><p>如果你希望后面的学习更顺利，请记住 Git 这三种状态：</p><ul><li>已提交（committed），表示数据已经安全的保存在本地数据库中</li><li>已修改（modified），表示修改了文件，但还没保存到数据库中</li><li>已暂存（staged），表示对一个已修改文件的当前版本做了标记，使之包含在下次提交的快照中</li></ul><p>由此引入了 Git 的三个工作区域：</p><ul><li>Git 仓库，用来保存项目的元数据和对象数据库</li><li>工作目录，对项目的某个版本进行独立提取</li><li>暂存区域，保存了下次将提交的文件列表信息，也可以叫“索引”</li></ul><p>Git 的工作流程是这样的：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/git/git-qiyuan-04.png" alt=""></p><ul><li>在工作目录中修改文件</li><li>暂存文件，将文件的快照放入暂存区域</li><li>提交更新，找到暂存区域的文件，将快照永久性存储到 Git 仓库目录</li></ul><h2 id="二、git-安装" tabindex="-1"><a class="header-anchor" href="#二、git-安装" aria-hidden="true">#</a> 二、Git 安装</h2><p>接下来，我们来看一下 <strong>Git 的安装</strong>，Linux 和 Windows 系统的安装大家可以到 Git 官网上查看安装方法，上面讲的非常详细。</p><blockquote><p>https://git-scm.com/downloads</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/git/git-qiyuan-05.png" alt=""></p><p>我个人使用的 macOS 系统，可以直接使用 <code>brew install git</code> 命令安装，非常方便。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/git/git-qiyuan-06.png" alt=""></p><p>安装成功后，再使用 <code>git --version</code> 就可以查看版本号了，我本机上安装的是 2.23.0 版本。</p><h2 id="三、git-的数据模型" tabindex="-1"><a class="header-anchor" href="#三、git-的数据模型" aria-hidden="true">#</a> 三、Git 的数据模型</h2><p>尽管 Git 的接口有些难懂，但它底层的设计和思想却非常的优雅。难懂的接口只能靠死记硬背，但优雅的底层设计则非常容易理解。我们可以通过一种自底向上的方式来学习 Git，先了解底层的数据模型，再学习它的接口。可以这么说，一旦搞懂了 Git 的数据模型，再学习它的接口并理解这些接口是如何操作数据模型的就非常容易了。</p><p>进行版本控制的方法很多，Git 拥有一个精心设计的模型，这使其能够支持版本控制所需的所有特性，比如维护历史记录、支持分支和团队协作。</p><h3 id="快照" tabindex="-1"><a class="header-anchor" href="#快照" aria-hidden="true">#</a> 快照</h3><p>Git 将顶级目录中的文件和文件夹称作集合，并通过一系列快照来管理历史记录。在 Git 的术语中，文件被称为 blob 对象（数据对象），也就是一组数据。目录则被称为 tree（树），目录中可以包含文件和子目录。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;root&gt; (tree)
 |
 +- foo (tree)
 |  |
@@ -386,6 +386,6 @@ $ git archive
 ECDSA key fingerprint is SHA256:p2QAMXNIC1TJYWeIOttrVc98/R1BUFWu3/LiyKgUfQM.
 Are you sure you want to continue connecting (yes/no/[fingerprint])? yes
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>这是因为需要你手动确认，输入 yes 即可。</p><p>接下来，我们使用 <code>git push</code> 命令将当前本地分支推送到 GitHub。加上了 -u 参数后，Git 不但会把本地的 master 分支推送的远程 master 分支上，还会把本地的 master 分支和远程的master 分支关联起来，在以后的推送或者拉取时就可以简化命令（比如说 <code>git push github master</code>）。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/git/jibenshiyong-23.png" alt=""></p><p>此时，我们刷一下 GitHub，可以看到多了一个 master 分支，并且本地的两个文件都推送成功了！</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/git/jibenshiyong-24.png" alt=""></p><p>从现在开始，只要本地做了修改，就可以通过 <code>git push</code> 命令推送到 GitHub 远程仓库了。</p><p>还可以使用 <code>git clone</code> 命令将远程仓库拷贝到本地。比如说我现在有一个 3.4k star 的仓库 JavaBooks，</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/git/jibenshiyong-25.png" alt=""></p><p>然后我使用 <code>git clone</code> 命令将其拷贝到本地。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/git/jibenshiyong-26.png" alt=""></p><h2 id="八、详解-sparse-checkout-命令" tabindex="-1"><a class="header-anchor" href="#八、详解-sparse-checkout-命令" aria-hidden="true">#</a> 八、详解 sparse-checkout 命令</h2><p>前天不是搭建了一个《Java 程序员进阶之路》的网站嘛，其中用到了 Git 来作为云服务器和 GitHub 远程仓库之间的同步工具。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/git/sparse-checkout-01.png" alt=""></p><p>给大家介绍一个牛逼的命令——<code>git sparse-checkout</code>，帮我的云服务器剩下了至少一半的存储空间。</p><h3 id="_1、使用-git-中遇到的一个大麻烦" tabindex="-1"><a class="header-anchor" href="#_1、使用-git-中遇到的一个大麻烦" aria-hidden="true">#</a> 1、使用 Git 中遇到的一个大麻烦</h3><p>首先给大家通报一下，一天前<a href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">上线的《Java 程序员进阶之路》网站<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，目前访问次数已经突破 1000 了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/git/sparse-checkout-03.png" alt=""></p><p>正所谓<strong>不积跬步无以至千里，不积小流无以成江海</strong>。</p><p>1000 次也许不值一提，但 1000 万也不过是 1 万个 1000，二哥取得的每一点点进步，都要感谢大家的倾力捧场。</p><p>看过<a href="https://mp.weixin.qq.com/s/NtOD5q95xPEs4aQpu4lGcg" target="_blank" rel="noopener noreferrer">上一篇搭建过程<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>的小伙伴应该都知道了，我是通过在云服务器上 clone 了一份 GitHub 上的远程仓库，然后通过宝塔面板的定时任务执行 <code>git pull</code> 命令从 GitHub 上拉取到最新的内容，再通过 <a href="https://mp.weixin.qq.com/s/OYOcjUwPZyPo8K4KAgJ4kw" target="_blank" rel="noopener noreferrer">Nginx 服务器<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>搭建的网站，网站内容是通过 docsify 渲染 md 文件得到的。</p><p>直接 <code>git pull</code> 会无脑把 GitHub 上的 codes、images 目录同步到云服务器上，但其实 codes、images 目录是不需要同步的。</p><p>具体是怎么一回事呢？</p><p>大家可以先看一下我这个 GitHub 仓库的目录结构哈。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/git/sparse-checkout-04.png" alt=""></p><ul><li>docs 是文档目录，里面是 md 文件，所有的教程原稿都在这里。</li><li>codes 是代码目录，里面是教程的配套源码。</li><li>images 是图片目录，里面是教程的配套手绘图。</li></ul><p>这样就可以利用 GitHub 来做免费的图床，并且还可以白票 jsDelivr CDN 的全球加速，简直不要太爽！</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/git/sparse-checkout-05.png" alt=""></p><p>比如说 images 目录下有一张 logo 图 logo-01.png：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/git/sparse-checkout-06.png" alt=""></p><p>如果使用 GitHub 仓库的原始路径来访问的话，速度贼慢！</p><blockquote><p>https://github.com/itwanger/toBeBetterJavaer/tree/master/images/logo-01.png</p></blockquote><p>使用 jsDelivr 加速后就不一样了，速度飞起！</p><blockquote><p>http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/logo-01.png</p></blockquote><p>简单总结下 GitHub 作为图床的正确用法，就两条：</p><ul><li>创建一个 GitHub 仓库作为图床仓库，上传提交图片到仓库中</li><li>在要使用 GitHub 图床图片的地方将链接换为 <code>https://cdn.jsdelivr.net/gh/{user}/{repo}/图片路径</code></li></ul><p>付费七牛云或者阿里云图床的小伙伴不妨试试这种方式，能白票咱绝不花一分冤枉钱。</p><p>那也就是说，《Java 程序员进阶之路》网站上的图片都是通过 GitHub 图床加载的，不需要将图片从 GitHub 仓库拉取到云服务器上。要知道，一台云服务器的空间是极其昂贵的，能省的空间咱必须得省。</p><h3 id="_2、学习-git-中遇到的一个大惊喜" tabindex="-1"><a class="header-anchor" href="#_2、学习-git-中遇到的一个大惊喜" aria-hidden="true">#</a> 2、学习 Git 中遇到的一个大惊喜</h3><p>于是我今天早上就在琢磨着，怎么样才能把这昂贵的空间省下来呢？</p><p>我百度了很多帖子，绝大多数都乱七八糟，毫无价值，能说到点子上的几乎没有。</p><p>最后还是浏览 Git 官方手册（也可以看<a href="https://mp.weixin.qq.com/s/RpFzXOa2VlFNd7ylLmr9LQ" target="_blank" rel="noopener noreferrer">Pro Git<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>）才找到了一个牛逼的命令：<strong>git sparse-checkout，它可以帮助我们在拉取远程仓库的时候只同步那些我们想要的目录和文件</strong>。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/git/sparse-checkout-07.png" alt=""> 具体怎么用，可以看官方文档：</p><blockquote><p>https://git-scm.com/docs/git-sparse-checkout</p></blockquote><p>但没必要，hhhh，我们直接实战。</p><p>第一步，通过 <code>git remote add -f orgin git@github.com:itwanger/toBeBetterJavaer.git</code> 命令从 GitHub 上拉取仓库。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/git/sparse-checkout-08.png" alt=""></p><p>第二步，启用 sparse-checkout，并初始化</p><p>拉取到仓库后，执行 <code>git config core.sparseCheckout true</code> 命令启用 sparse-checkout。</p><p>然后再执行 <code>git sparse-checkout init</code> 初始化。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/git/sparse-checkout-09.png" alt=""></p><p>第三步，使用 sparse-checkout 来拉取我们想要的仓库目录</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/git/sparse-checkout-10.png" alt=""></p><p>比如说，我们只想拉取 docs 目录，可以执行 <code>git sparse-checkout set docs</code> 命令。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/git/sparse-checkout-11.png" alt=""></p><p>如果是第一次使用 sparse-checkout 的话，还需要执行一下 <code>git pull orgin master</code> 命令拉取一次。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/git/sparse-checkout-12.png" alt=""> 第四步，验证是否生效</p><p>可以执行 <code>ls -al</code> 命令来确认 sparse-checkout 是否生效。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/git/sparse-checkout-13.png" alt=""></p><p>如图所示，确实只拉取到了 docs 目录。</p><p>假如还想要拉取其他文件或者目录的话，可以通过 <code>git sparse-checkout add</code> 命令来添加。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/git/sparse-checkout-14.png" alt=""></p><p>这就实现了，<strong>远程仓库和云服务器仓库之间的定制化同步，需要什么目录和文件就同步什么目录和文件，不需要的可以统统不要</strong>。</p><p>GitHub 仓库可以免费用，空间也无限大，但云服务可是要抠抠搜搜的用，毕竟扩充存储空间是真的贵！</p><p>我对比了一下，远程仓库大概 145 M，图片就占了 72 M，妥妥地省下了一半的存储空间。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/git/sparse-checkout-15.png" alt=""></p><p>如何禁用 git sparse-checkout 呢？</p><p>也简单，只需要执行一下 <code>git sparse-checkout disable</code> 命令就可以了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/git/sparse-checkout-16.png" alt=""></p><p>可以看到，那些我们不想要的目录和文件统统都又回来了。</p><p>如果重新启用呢？</p><p>也简单，只需要执行一下 <code>git sparse-checkout reapply</code> 命令就可以了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/git/sparse-checkout-17.png" alt=""></p><p>简单总结下：如果你要把一个庞大到撑满你硬盘的远程仓库拉取到本地，而你只需要其中的一部分目录和文件，那就可以试一试 <code>git sparse-checkout</code> 了。</p><h3 id="_3、使用-git-后的一点心里话" tabindex="-1"><a class="header-anchor" href="#_3、使用-git-后的一点心里话" aria-hidden="true">#</a> 3、使用 Git 后的一点心里话</h3><p>不得不说，Git 实在是太强大了。就一行命令，解决了困扰我一天的烦恼，我的 80G 存储空间的云服务器又可以再战 3 年了，从此以后再也不用担心了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/git/sparse-checkout-18.png" alt=""></p><p>Git 是真的牛逼，Linus 是真的牛逼，神不愧是神！</p><hr><p>推荐阅读：</p><blockquote><ul><li><a href="https://mp.weixin.qq.com/s/RpFzXOa2VlFNd7ylLmr9LQ" target="_blank" rel="noopener noreferrer">下载→豆瓣9.1分的 Pro Git 学习手册 YYDS！<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/lY79hI7URuFh3gD9DJKInQ" target="_blank" rel="noopener noreferrer">摸清 Git 的门路，就靠这 22 张图<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/Z766Egape2QicYndsQjZ4g" target="_blank" rel="noopener noreferrer">保姆级Git入门教程，万字详解<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul></blockquote><p>参考资料：</p><blockquote><ul><li>维基百科：https://zh.wikipedia.org/wiki/Git</li><li>hutusi：<a href="https://mp.weixin.qq.com/s/gM__sQPILkAKWsMejOO8cA" target="_blank" rel="noopener noreferrer">改变世界的一次代码提交<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 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xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2021年12月10日</span><meta property="datePublished" content="2021-12-10T05:52:21.000Z"></span><!----><!----><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 1 分钟</span><meta property="timeRequired" content="PT1M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><p>今天给大家分享一本个人最近看过觉得非常不错的Git开源手册，可能有些小伙伴也看过了，我是最近在通勤路上用PAD看的。这本开源手册，它除了有<strong>PDF版</strong>，还有<strong>epub电子书版</strong>，非常适合电子阅读，有需要的小伙伴可以在文末自行下载：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/git/progit-01.png" alt=""></p><p>相信看完对于个人Git知识体系的梳理和掌握是非常有帮助的。</p><p>这本手册在豆瓣上评价极高，之前9.3，现在也有9.1的高分，其作者是GitHub的员工，内容主要侧重于各种场合中的惯用法和底层原理的讲述，手册中还针对不同的使用场景，设计了几个合适的版本管理策略。简而言之，这本手册无论是对于初学者还是想进一步了解Git工作原理的开发者都非常合适。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/git/progit-02.png" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/git/progit-03.png" alt=""></p><p>这个手册一共分为十章，详细内容如下：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/git/progit-04.png" alt=""></p><p><strong>手册中部分内容展示如下：</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/git/progit-05.png" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/git/progit-06.png" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/git/progit-07.png" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/git/progit-08.png" alt=""></p><p><strong>需要该Git手册PDF+epub电子书的小伙伴：</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/git/progit-09.png" alt=""></p><p>可直接长按扫码关注下方二维码，回复 「<strong>git</strong>」 即可下载：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/itwanger.png" alt="（长按扫码识别）"></p><p>好了，这次资源分享就到这里！后续如果遇到有用的工具或者资源，依然还会持续分享，也欢迎大家多多安利和交流，一起分享成长。</p><p>以上，我们下篇见。</p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/git/progit.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 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clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!----></h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2021年12月10日</span><meta property="datePublished" content="2021-12-10T05:52:21.000Z"></span><!----><!----><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 1 分钟</span><meta property="timeRequired" content="PT1M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><p>今天给大家分享一本个人最近看过觉得非常不错的Git开源手册，可能有些小伙伴也看过了，我是最近在通勤路上用PAD看的。这本开源手册，它除了有<strong>PDF版</strong>，还有<strong>epub电子书版</strong>，非常适合电子阅读，有需要的小伙伴可以在文末自行下载：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/git/progit-01.png" alt=""></p><p>相信看完对于个人Git知识体系的梳理和掌握是非常有帮助的。</p><p>这本手册在豆瓣上评价极高，之前9.3，现在也有9.1的高分，其作者是GitHub的员工，内容主要侧重于各种场合中的惯用法和底层原理的讲述，手册中还针对不同的使用场景，设计了几个合适的版本管理策略。简而言之，这本手册无论是对于初学者还是想进一步了解Git工作原理的开发者都非常合适。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/git/progit-02.png" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/git/progit-03.png" alt=""></p><p>这个手册一共分为十章，详细内容如下：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/git/progit-04.png" alt=""></p><p><strong>手册中部分内容展示如下：</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/git/progit-05.png" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/git/progit-06.png" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/git/progit-07.png" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/git/progit-08.png" alt=""></p><p><strong>需要该Git手册PDF+epub电子书的小伙伴：</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/git/progit-09.png" alt=""></p><p>可直接长按扫码关注下方二维码，回复 「<strong>git</strong>」 即可下载：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/itwanger.png" alt="（长按扫码识别）"></p><p>好了，这次资源分享就到这里！后续如果遇到有用的工具或者资源，依然还会持续分享，也欢迎大家多多安利和交流，一起分享成长。</p><p>以上，我们下篇见。</p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/git/progit.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/12 下午4:24:21</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><!----><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 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class="theme-hope-content"><p>小二是公司新来的实习生，之前面试的过程中对答如流，所以我非常看好他。第一天，我给他了一台新电脑，要他先在本地搭建个 Java 开发环境。</p><p>二话不说，他就开始马不停蹄地行动了。真没想到，他竟然是通过命令行的方式安装的 JDK，这远远超出了我对他的预期。</p><p>我以为，他会使用图形化的方式来安装 JDK 的，就像这样。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/Chocolatey-Homebrew-3d58d8db-e851-4c3d-97a5-66c8bf94d420.png" alt=""></p><p>还有这样。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/Chocolatey-Homebrew-eda6f2a0-a192-4b92-b3cc-46f679ec5bcb.png" alt=""></p><p>结果他是这样的。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/Chocolatey-Homebrew-371831e9-4580-4097-a0bf-d9c460f493fb.png" alt=""></p><p>卧槽！牛逼高大上啊！</p><p>看着他熟练地在命令行里安装 JDK 的样子，我的嘴角开始微微上扬，真不错！这次总算招到了一个靠谱的。</p><p>于是我就安排他做一个记录，打算发表在我的小破站《Java 程序员进阶之路》上。从他嘴里了解到，他用的命令行软件管理器叫 chocolatey，这是一个Windows下的命令行软件管理器，可以方便开发者像在Linux下使用yum命令来安装软件，或者像在macOS下使用brew 命令来安装软件，我感觉非常酷炫。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/Chocolatey-Homebrew-509ea602-39b0-462e-9b8d-2a55fc31a4c8.png" alt=""></p><p>以下是他的记录，一起来欣赏下。</p><h3 id="关于shell" tabindex="-1"><a class="header-anchor" href="#关于shell" aria-hidden="true">#</a> 关于shell</h3><p>对于一名 Java 后端程序员来说，初学阶段，你可以选择在 IDE 中直接编译运行 Java 代码，但有时候也需要在 Shell 下编译和运行 Java 代码。</p><blockquote><p>Windows 下自带的 Shell 叫命令提示符，或者 cmd 或者 powershell，macOS 下叫终端 terminal。</p></blockquote><ul><li><a href="https://mp.weixin.qq.com/s?__biz=MzIxNzQwNjM3NA==&amp;mid=2247491253&amp;idx=1&amp;sn=9a46879174f7240267fe5b5205d16d22&amp;scene=21#wechat_redirect" target="_blank" rel="noopener noreferrer">终端与 Shell 的区别<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/oEo8N3nE0wR1zl7qD4nh3w" target="_blank" rel="noopener noreferrer">初次体验 macOS 下的 Shell<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul><p>但当你需要在生产环境下部署 Java项目或者查看日志的话，就必然会用到 Shell，这个阶段，Shell 的使用频率高到可以用一个成语来形容——朝夕相伴。</p><p>一些第三方软件会在原生的 Shell 基础上提供更强大的功能，常见的有 tabby、Warp、xhsell、FinalShell、MobaXterm、Aechoterm、WindTerm、termius、iterm2 等等，有些只能在 Windows 上使用，有些只能在 macOS 上使用，有些支持全平台。还有 ohmyzsh 这种超神的 Shell 美化工具。</p><p>这里，我们列举一些 Shell 的基本操作命令（Windows 和 macOS/Linux 有些许差异）：</p><ul><li>切换目录，可以使用 cd 命令切换目录，<code>cd ..</code> 返回上级目录。</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/Chocolatey-Homebrew-d4f0634f-7b5b-4bbd-97eb-74ec1fe059c5.png" alt=""></p><ul><li>目录列表，macos/linux 下可以使用 ls 命令列出目录下所有的文件和子目录（Windows 下使用 dir 命令），使用通配符 <code>*</code> 对展示的内容进行过滤，比如 <code>ls *.java</code> 列出所有 <code>.java</code>后缀的文件，如果想更进一步的话，可以使用 <code>ls H*.java</code> 列出所有以 H 开头 <code>.java</code> 后缀的文件。</li><li>新建目录，macOS/Linux 下可以使用 mkdir 命令新建一个目录（比如 <code>mkdir hello</code> 可以新建一个 hello 的目录），Windows 下可以使用 md 命令。</li><li>删除文件，macOS/Linux 下可以使用 <code>rm</code> 命令删除文件（比如 <code>rm hello.java</code> 删除 hello.java 文件），Windows 下可以使用 del 命令。</li><li>删除目录，macOS/Linux 下可以使用 <code>rm -r</code> 命令删除目录以及它所包含的所有文件（比如说 <code>rm -r hello</code> 删除 hello 目录）。Windows 下可以使用 deltree 命令。</li><li>重复命令，macOS/Linux/Windows 下都可以使用上下箭头来选择以往执行过的命令。</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/Chocolatey-Homebrew-738501d4-c210-449c-9d6c-56d5d16c623b.png" alt=""></p><ul><li>命令历史，macOS/Linux 下可以使用 <code>history</code> 命令查看所有使用过的命令。Windows 可以按下 F7 键。</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/Chocolatey-Homebrew-e90c8f1f-c46c-47da-be88-0e8a00d85089.png" alt=""></p><ul><li>解压文件，后缀名为“.zip”的文件是一个包含了其他文件的压缩包，macOS/Linux 系统自身已经提供了用于解压的 unzip 命令， Windows 的话需要手动安装。</li></ul><h3 id="安装jdk" tabindex="-1"><a class="header-anchor" href="#安装jdk" aria-hidden="true">#</a> 安装JDK</h3><p><strong>1）Windows</strong></p><p>推荐先安装 chocolatey。这是一个Windows下的命令行软件管理器，可以方便开发者像在Linux下使用yum命令来安装软件，或者像在macOS下使用brew 命令来安装软件，非常酷炫。</p><blockquote><p>The biggest challenge is reducing duplication of effort, so users turn to Chocolatey for simplicity</p></blockquote><p>传统的安装方式要么非常耗时，要么非常低效，在命令行安装软件除了简单高效，还能自动帮我们配置环境变量。</p><blockquote><ul><li>官方地址：<a href="https://chocolatey.org/" target="_blank" rel="noopener noreferrer">https://chocolatey.org/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li>安装文档：<a href="https://chocolatey.org/install#individual" target="_blank" rel="noopener noreferrer">https://chocolatey.org/install#individual<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul></blockquote><p>安装完成后如下图所示：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/Chocolatey-Homebrew-5fd2b098-5685-49be-b424-f13ac288858d.png" alt=""></p><p>如果不确定是否安装成功的话，可以通过键入 <code>choco</code> 命令来确认。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/Chocolatey-Homebrew-a7ea03ef-aa60-47a8-adfc-8b6dde1cf4cc.png" alt=""></p><p>这里推荐几个非常高效的操作命令：</p><ul><li>choco search xxx，查找 xxx 安装包</li><li>choco info xxx，查看 xxx 安装包信息</li><li>choco install xxx，安装 xxx 软件</li><li>choco upgrade xxx，升级 xxx 软件</li><li>choco uninstall xxx， 卸载 xxx 软件</li></ul><p>如何知道 chocolatey 仓库中都有哪些安装包可用呢？</p><p>可以通过上面提到的命令行的方式，也可以访问官方仓库进行筛选。</p><blockquote><p><a href="https://community.chocolatey.org/packages" target="_blank" rel="noopener noreferrer">https://community.chocolatey.org/packages<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>比如说我们来查找 Java。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/Chocolatey-Homebrew-a5d6ff0f-f36d-4eb0-a69e-2ba30dd315ea.png" alt=""></p><p>好，现在可以直接在shell中键入 <code>choco install jdk8</code> 来安装 JDK8 了，并且会自动将Java加入到环境变量中，不用再去「我的电脑」「环境变量」中新建 JAVA_HOME 并复制 JDK 安装路径配置 PATH 变量了，是不是非常 nice？</p><p>稍等片刻，键入 <code>java -version</code> 就可以确认Java是否安装成功了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/Chocolatey-Homebrew-31441e14-b692-4abc-8640-a8b70e08dfae.png" alt=""></p><p>不得不承认！非常nice！</p><p><strong>2）macOS</strong></p><p>首先推荐安装 homebrew，这是macOS下的命令行软件管理器，用来简化 macOS 上软件的安装过程。homebrew 是开源的，在 GitHub 已收获 32k star。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/Chocolatey-Homebrew-0f9c86a0-e4b2-4103-a77e-8771ab8253f5.png" alt=""></p><p>homebrew 的安装也非常的简单，只需要一行命令即可。</p><blockquote><p>官方网址：<a href="https://brew.sh/index_zh-cn" target="_blank" rel="noopener noreferrer">https://brew.sh/index_zh-cn<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/Chocolatey-Homebrew-b1e8ea1c-2aec-4f79-bdc8-eb3e4fe1a0f0.png" alt=""></p><ul><li>使用 <code>brew install xxx</code> 可以安装 macOS 上没有预装的软件</li><li>使用 <code>brew install --cask yyy</code> 可以安装 macOS 其他非开源软件。</li></ul><p>这里是 homebrew 常用命令的一个清单，可供参考。</p><table><thead><tr><th>命令</th><th>描述</th></tr></thead><tbody><tr><td>brew update</td><td>更新 Homebrew</td></tr><tr><td>brew search package</td><td>搜索软件包</td></tr><tr><td>brew install package</td><td>安装软件包</td></tr><tr><td>brew uninstall package</td><td>卸载软件包</td></tr><tr><td>brew upgrade</td><td>升级所有软件包</td></tr><tr><td>brew upgrade package</td><td>升级指定软件包</td></tr><tr><td>brew list</td><td>列出已安装的软件包列表</td></tr><tr><td>brew services command package</td><td>管理 brew 安装软件包</td></tr><tr><td>brew services list</td><td>列出 brew 管理运行的服务</td></tr><tr><td>brew info package</td><td>查看软件包信息</td></tr><tr><td>brew deps package</td><td>列出软件包的依赖关系</td></tr><tr><td>brew help</td><td>查看帮助</td></tr><tr><td>brew cleanup</td><td>清除过时软件包</td></tr><tr><td>brew link package</td><td>创建软件包符号链接</td></tr><tr><td>brew unlink package</td><td>取消软件包符号链接</td></tr><tr><td>brew doctor</td><td>检查系统是否存在问题</td></tr></tbody></table><p>安装完 homebrew 后，建议替换homebrew 的默认源为中科大的，原因就不用我多说了吧？替换方法如下所示：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>替换brew.git:
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0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年5月9日</span><meta property="datePublished" content="2022-05-09T06:49:16.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 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13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 8 分钟</span><meta property="timeRequired" content="PT8M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/Chocolatey-Homebrew.html#关于shell" class="router-link-active router-link-exact-active toc-link level3">关于shell</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/Chocolatey-Homebrew.html#安装jdk" class="router-link-active router-link-exact-active toc-link level3">安装JDK</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/Chocolatey-Homebrew.html#关于编辑器" class="router-link-active router-link-exact-active toc-link level3">关于编辑器</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><p>小二是公司新来的实习生，之前面试的过程中对答如流，所以我非常看好他。第一天，我给他了一台新电脑，要他先在本地搭建个 Java 开发环境。</p><p>二话不说，他就开始马不停蹄地行动了。真没想到，他竟然是通过命令行的方式安装的 JDK，这远远超出了我对他的预期。</p><p>我以为，他会使用图形化的方式来安装 JDK 的，就像这样。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/Chocolatey-Homebrew-3d58d8db-e851-4c3d-97a5-66c8bf94d420.png" alt=""></p><p>还有这样。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/Chocolatey-Homebrew-eda6f2a0-a192-4b92-b3cc-46f679ec5bcb.png" alt=""></p><p>结果他是这样的。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/Chocolatey-Homebrew-371831e9-4580-4097-a0bf-d9c460f493fb.png" alt=""></p><p>卧槽！牛逼高大上啊！</p><p>看着他熟练地在命令行里安装 JDK 的样子，我的嘴角开始微微上扬，真不错！这次总算招到了一个靠谱的。</p><p>于是我就安排他做一个记录，打算发表在我的小破站《Java 程序员进阶之路》上。从他嘴里了解到，他用的命令行软件管理器叫 chocolatey，这是一个Windows下的命令行软件管理器，可以方便开发者像在Linux下使用yum命令来安装软件，或者像在macOS下使用brew 命令来安装软件，我感觉非常酷炫。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/Chocolatey-Homebrew-509ea602-39b0-462e-9b8d-2a55fc31a4c8.png" alt=""></p><p>以下是他的记录，一起来欣赏下。</p><h3 id="关于shell" tabindex="-1"><a class="header-anchor" href="#关于shell" aria-hidden="true">#</a> 关于shell</h3><p>对于一名 Java 后端程序员来说，初学阶段，你可以选择在 IDE 中直接编译运行 Java 代码，但有时候也需要在 Shell 下编译和运行 Java 代码。</p><blockquote><p>Windows 下自带的 Shell 叫命令提示符，或者 cmd 或者 powershell，macOS 下叫终端 terminal。</p></blockquote><ul><li><a href="https://mp.weixin.qq.com/s?__biz=MzIxNzQwNjM3NA==&amp;mid=2247491253&amp;idx=1&amp;sn=9a46879174f7240267fe5b5205d16d22&amp;scene=21#wechat_redirect" target="_blank" rel="noopener noreferrer">终端与 Shell 的区别<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/oEo8N3nE0wR1zl7qD4nh3w" target="_blank" rel="noopener noreferrer">初次体验 macOS 下的 Shell<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul><p>但当你需要在生产环境下部署 Java项目或者查看日志的话，就必然会用到 Shell，这个阶段，Shell 的使用频率高到可以用一个成语来形容——朝夕相伴。</p><p>一些第三方软件会在原生的 Shell 基础上提供更强大的功能，常见的有 tabby、Warp、xhsell、FinalShell、MobaXterm、Aechoterm、WindTerm、termius、iterm2 等等，有些只能在 Windows 上使用，有些只能在 macOS 上使用，有些支持全平台。还有 ohmyzsh 这种超神的 Shell 美化工具。</p><p>这里，我们列举一些 Shell 的基本操作命令（Windows 和 macOS/Linux 有些许差异）：</p><ul><li>切换目录，可以使用 cd 命令切换目录，<code>cd ..</code> 返回上级目录。</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/Chocolatey-Homebrew-d4f0634f-7b5b-4bbd-97eb-74ec1fe059c5.png" alt=""></p><ul><li>目录列表，macos/linux 下可以使用 ls 命令列出目录下所有的文件和子目录（Windows 下使用 dir 命令），使用通配符 <code>*</code> 对展示的内容进行过滤，比如 <code>ls *.java</code> 列出所有 <code>.java</code>后缀的文件，如果想更进一步的话，可以使用 <code>ls H*.java</code> 列出所有以 H 开头 <code>.java</code> 后缀的文件。</li><li>新建目录，macOS/Linux 下可以使用 mkdir 命令新建一个目录（比如 <code>mkdir hello</code> 可以新建一个 hello 的目录），Windows 下可以使用 md 命令。</li><li>删除文件，macOS/Linux 下可以使用 <code>rm</code> 命令删除文件（比如 <code>rm hello.java</code> 删除 hello.java 文件），Windows 下可以使用 del 命令。</li><li>删除目录，macOS/Linux 下可以使用 <code>rm -r</code> 命令删除目录以及它所包含的所有文件（比如说 <code>rm -r hello</code> 删除 hello 目录）。Windows 下可以使用 deltree 命令。</li><li>重复命令，macOS/Linux/Windows 下都可以使用上下箭头来选择以往执行过的命令。</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/Chocolatey-Homebrew-738501d4-c210-449c-9d6c-56d5d16c623b.png" alt=""></p><ul><li>命令历史，macOS/Linux 下可以使用 <code>history</code> 命令查看所有使用过的命令。Windows 可以按下 F7 键。</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/Chocolatey-Homebrew-e90c8f1f-c46c-47da-be88-0e8a00d85089.png" alt=""></p><ul><li>解压文件，后缀名为“.zip”的文件是一个包含了其他文件的压缩包，macOS/Linux 系统自身已经提供了用于解压的 unzip 命令， Windows 的话需要手动安装。</li></ul><h3 id="安装jdk" tabindex="-1"><a class="header-anchor" href="#安装jdk" aria-hidden="true">#</a> 安装JDK</h3><p><strong>1）Windows</strong></p><p>推荐先安装 chocolatey。这是一个Windows下的命令行软件管理器，可以方便开发者像在Linux下使用yum命令来安装软件，或者像在macOS下使用brew 命令来安装软件，非常酷炫。</p><blockquote><p>The biggest challenge is reducing duplication of effort, so users turn to Chocolatey for simplicity</p></blockquote><p>传统的安装方式要么非常耗时，要么非常低效，在命令行安装软件除了简单高效，还能自动帮我们配置环境变量。</p><blockquote><ul><li>官方地址：<a href="https://chocolatey.org/" target="_blank" rel="noopener noreferrer">https://chocolatey.org/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li>安装文档：<a href="https://chocolatey.org/install#individual" target="_blank" rel="noopener noreferrer">https://chocolatey.org/install#individual<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul></blockquote><p>安装完成后如下图所示：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/Chocolatey-Homebrew-5fd2b098-5685-49be-b424-f13ac288858d.png" alt=""></p><p>如果不确定是否安装成功的话，可以通过键入 <code>choco</code> 命令来确认。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/Chocolatey-Homebrew-a7ea03ef-aa60-47a8-adfc-8b6dde1cf4cc.png" alt=""></p><p>这里推荐几个非常高效的操作命令：</p><ul><li>choco search xxx，查找 xxx 安装包</li><li>choco info xxx，查看 xxx 安装包信息</li><li>choco install xxx，安装 xxx 软件</li><li>choco upgrade xxx，升级 xxx 软件</li><li>choco uninstall xxx， 卸载 xxx 软件</li></ul><p>如何知道 chocolatey 仓库中都有哪些安装包可用呢？</p><p>可以通过上面提到的命令行的方式，也可以访问官方仓库进行筛选。</p><blockquote><p><a href="https://community.chocolatey.org/packages" target="_blank" rel="noopener noreferrer">https://community.chocolatey.org/packages<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>比如说我们来查找 Java。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/Chocolatey-Homebrew-a5d6ff0f-f36d-4eb0-a69e-2ba30dd315ea.png" alt=""></p><p>好，现在可以直接在shell中键入 <code>choco install jdk8</code> 来安装 JDK8 了，并且会自动将Java加入到环境变量中，不用再去「我的电脑」「环境变量」中新建 JAVA_HOME 并复制 JDK 安装路径配置 PATH 变量了，是不是非常 nice？</p><p>稍等片刻，键入 <code>java -version</code> 就可以确认Java是否安装成功了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/Chocolatey-Homebrew-31441e14-b692-4abc-8640-a8b70e08dfae.png" alt=""></p><p>不得不承认！非常nice！</p><p><strong>2）macOS</strong></p><p>首先推荐安装 homebrew，这是macOS下的命令行软件管理器，用来简化 macOS 上软件的安装过程。homebrew 是开源的，在 GitHub 已收获 32k star。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/Chocolatey-Homebrew-0f9c86a0-e4b2-4103-a77e-8771ab8253f5.png" alt=""></p><p>homebrew 的安装也非常的简单，只需要一行命令即可。</p><blockquote><p>官方网址：<a href="https://brew.sh/index_zh-cn" target="_blank" rel="noopener noreferrer">https://brew.sh/index_zh-cn<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/Chocolatey-Homebrew-b1e8ea1c-2aec-4f79-bdc8-eb3e4fe1a0f0.png" alt=""></p><ul><li>使用 <code>brew install xxx</code> 可以安装 macOS 上没有预装的软件</li><li>使用 <code>brew install --cask yyy</code> 可以安装 macOS 其他非开源软件。</li></ul><p>这里是 homebrew 常用命令的一个清单，可供参考。</p><table><thead><tr><th>命令</th><th>描述</th></tr></thead><tbody><tr><td>brew update</td><td>更新 Homebrew</td></tr><tr><td>brew search package</td><td>搜索软件包</td></tr><tr><td>brew install package</td><td>安装软件包</td></tr><tr><td>brew uninstall package</td><td>卸载软件包</td></tr><tr><td>brew upgrade</td><td>升级所有软件包</td></tr><tr><td>brew upgrade package</td><td>升级指定软件包</td></tr><tr><td>brew list</td><td>列出已安装的软件包列表</td></tr><tr><td>brew services command package</td><td>管理 brew 安装软件包</td></tr><tr><td>brew services list</td><td>列出 brew 管理运行的服务</td></tr><tr><td>brew info package</td><td>查看软件包信息</td></tr><tr><td>brew deps package</td><td>列出软件包的依赖关系</td></tr><tr><td>brew help</td><td>查看帮助</td></tr><tr><td>brew cleanup</td><td>清除过时软件包</td></tr><tr><td>brew link package</td><td>创建软件包符号链接</td></tr><tr><td>brew unlink package</td><td>取消软件包符号链接</td></tr><tr><td>brew doctor</td><td>检查系统是否存在问题</td></tr></tbody></table><p>安装完 homebrew 后，建议替换homebrew 的默认源为中科大的，原因就不用我多说了吧？替换方法如下所示：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>替换brew.git:
 cd &quot;$(brew --repo)&quot;
 git remote set-url origin https://mirrors.ustc.edu.cn/brew.git
 
@@ -50,6 +50,6 @@ git remote set-url origin https://mirrors.ustc.edu.cn/brew.git
 cd &quot;$(brew --repo)/Library/Taps/homebrew/homebrew-core&quot;
 git remote set-url origin https://mirrors.ustc.edu.cn/homebrew-core.git
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>如何知道 homebrew 仓库中都有哪些安装包可用呢？</p><p>第一种，通过 <code>brew search xxx</code> 命令搜索，比如说我们要搜索 jdk</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/Chocolatey-Homebrew-11bdc7b9-5060-4563-9e14-1bc9013882ce.png" alt=""></p><p>第二种，通过 homebrew 官网搜索，比如说我们要搜索 openjdk。</p><blockquote><p>官方地址：<a href="https://formulae.brew.sh" target="_blank" rel="noopener noreferrer">https://formulae.brew.sh<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/Chocolatey-Homebrew-80b4318e-0491-4ebd-8047-7e4528426921.png" alt=""></p><p>这里有一份不错的 homebrew 帮助文档，可供参考：</p><blockquote><p><a href="https://sspai.com/post/56009" target="_blank" rel="noopener noreferrer">https://sspai.com/post/56009<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>OK，我们来安装JDK，只需要简单的一行命令就可以搞定。</p><p><code>brew install openjdk@8</code></p><p>对比下载安装包，通过图形化界面的方式安装 JDK，是不是感觉在 Shell 下安装 JDK 更炫酷一些？</p><p>关键是还省去了环境变量的配置。</p><p>记得还没有走出新手村的时候，就经常被环境变量配置烦不胜烦。那下载这种命令行的方式，要比手动在环境变量中配置要省事一百倍，也更不容易出错。</p><h3 id="关于编辑器" tabindex="-1"><a class="header-anchor" href="#关于编辑器" aria-hidden="true">#</a> 关于编辑器</h3><p>安装完 Java 之后，你还需要一个编辑器，用来编写 Java 代码。</p><p>编辑器多种多样，常见的有集成开发环境（IDE,比如 Intellij IDEA 和 vscode），和简单的文本编辑工具（比如 sublime text）。</p><p>我建议这三个工具都要装，日常开发中，我会在这三个编辑器中来回切换。</p><p>Intellij IDEA：主要用来编写Java代码，并且最好安装旗舰版，社区版用来学习JavaSE部分是绰绰有余的，但要想拥有更强大的生产力，旗舰版是必须的，因为功能更加强大。</p><p>比如说 idea 旗舰版中可以直接通过 Initializr 来创建springboot项目，但社区版就没有此功能。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/Chocolatey-Homebrew-d493229a-d62e-42cc-a6f0-7e3c0893a0c5.png" alt=""></p><p>vscode：更加轻量级的 IDE，在编写Java代码上可以和idea媲美，但要想调试Java代码的话，vscode 和idea的差距还是非常明显的。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/Chocolatey-Homebrew-5e913932-58a8-415a-a1aa-30a7e0f2b8aa.png" alt=""></p><p>我会使用 Intellij IDEA 开发编程喵的后端代码，vscode 来开发编程喵的前端代码。</p><p>sublime text：功能更强大的文本编辑器，比记事本这种强大一万倍，也更符合21世纪开发者的外观审美。如果只是简单的修改一下代码格式，或者注释，显然更加方便，因为idea还是比较吃内存的，出差旅行的时候，在笔记本上紧急修改一些代码时，更易用。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/Chocolatey-Homebrew-85aaca81-9e18-4ba9-aaf2-2989abb85fc5.png" alt=""></p><p>我会配合 GitHub 桌面版来使用 sublime text，编辑 MD 文档的时候会比较舒服。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a 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-    <script type="module" src="/assets/app.a0271b9c.js" defer></script>
+    <script type="module" src="/assets/app.615e41d8.js" defer></script>
   </body>
 </html>
diff --git a/dist/gongju/DBeaver.html b/dist/gongju/DBeaver.html
index 0d0e223d..e8f636d6 100644
--- a/dist/gongju/DBeaver.html
+++ b/dist/gongju/DBeaver.html
@@ -39,10 +39,10 @@
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class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->DBeaver：一款免费的数据库操作工具</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 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class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/DBeaver.html#一、关于-dbeaver" class="router-link-active router-link-exact-active toc-link level3">一、关于 DBeaver</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/DBeaver.html#二、安装-dbeaver" class="router-link-active router-link-exact-active toc-link level3">二、安装 DBeaver</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/DBeaver.html#三、管理数据源" class="router-link-active router-link-exact-active toc-link level3">三、管理数据源</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/DBeaver.html#四、管理表" class="router-link-active router-link-exact-active toc-link level3">四、管理表</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/DBeaver.html#五、执行-sql" class="router-link-active router-link-exact-active toc-link level3">五、执行 SQL</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/DBeaver.html#六、外观配置" class="router-link-active router-link-exact-active toc-link level3">六、外观配置</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/DBeaver.html#七、总结" class="router-link-active router-link-exact-active toc-link level3">七、总结</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><p>作为一名开发者，免不了要和数据库打交道，于是我们就需要一款顺手的数据库管理工具。很长一段时间里，Navicat 都是我的首选，但最近更换了一台新电脑，之前的绿色安装包找不到了。</p><p>于是就琢磨着，找一款免费的，功能和 Navicat 有一拼的数据库管理工具来替代。好朋友 macrozheng 给我推荐了 DBeaver，试用完后体验真心不错，于是就来给大家安利一波。</p><h3 id="一、关于-dbeaver" tabindex="-1"><a class="header-anchor" href="#一、关于-dbeaver" aria-hidden="true">#</a> 一、关于 DBeaver</h3><p>DBeaver 是一个跨平台的数据库管理工具，支持 Windows、Linux 和 macOS。它有两个版本，企业版和社区版，对于个人开发者来说，社区版的功能已经足够强大。</p><p>DBeaver 是由 Java 编写的，默认使用 JDK 11 进行编译。社区版基于 <a href="https://github.com/dbeaver/dbeaver/blob/devel/LICENSE.md" target="_blank" rel="noopener noreferrer">Apache-2.0 License<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a> 在 GitHub 上开源，目前已获得 24k+ 的星标。</p><blockquote><p><a href="https://github.com/dbeaver/dbeaver" target="_blank" rel="noopener noreferrer">https://github.com/dbeaver/dbeaver<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-1.png" alt=""></p><p>DBeaver 支持几乎所有主流的数据库，包括关系型数据库和非关系数据库。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-2.png" alt=""></p><h3 id="二、安装-dbeaver" tabindex="-1"><a class="header-anchor" href="#二、安装-dbeaver" aria-hidden="true">#</a> 二、安装 DBeaver</h3><p>可以通过 DBeaver 官方下载安装包，也可以通过 GitHub 下载 release 版本。</p><blockquote><p>官方下载地址：<a href="https://dbeaver.io/download/" target="_blank" rel="noopener noreferrer">https://dbeaver.io/download/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-3.png" alt=""></p><p>根据自己电脑的操作系统下载对应的安装包，完整安装后，第一步要做的是配置 Maven 镜像，否则在后续下载数据库驱动的时候会非常的慢。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-4.png" alt=""></p><p>因为 DBeaver 是基于 <a href="https://github.com/itwanger/toBeBetterJavaer/blob/master/docs/maven/maven.md" target="_blank" rel="noopener noreferrer">Maven 构建<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>的，数据库驱动也就是链接数据库的 JDBC 驱动是通过 Maven 仓库下载的。选择「首选项」→「Maven」，添加阿里云镜像地址：</p><blockquote><p><a href="http://maven.aliyun.com/nexus/content/groups/public" target="_blank" rel="noopener noreferrer">http://maven.aliyun.com/nexus/content/groups/public<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>和配置 Maven 镜像一样，如下图所示。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-5.png" alt=""></p><p>配置完成后，记得把阿里云镜像仓库置顶。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-6.png" alt=""></p><h3 id="三、管理数据源" tabindex="-1"><a class="header-anchor" href="#三、管理数据源" aria-hidden="true">#</a> 三、管理数据源</h3><p>像使用 Navicat 一样，我们需要先建立连接，这里就以 MySQL 为例。点击「连接」小图标，选择数据库。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-7.png" alt=""></p><p>点击下一步，这时候需要填写数据库连接信息。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-8.png" alt=""></p><p>点击「测试链接」，如果使用默认的 Maven 仓库时，下载驱动会非常慢，如下图所示，还容易失败「踩过的坑就不要再踩了」。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-9.png" alt=""></p><p>如果你前面按照我说的配置了阿里云的 Maven 镜像，程序就不一样了，点了「测试链接」，瞬间会弹出「连接已成功」的提示框。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-10.png" alt=""></p><p>链接成功后，就可以看到数据库中的表啊、视图啊、索引啊等等。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-11.png" alt=""></p><h3 id="四、管理表" tabindex="-1"><a class="header-anchor" href="#四、管理表" aria-hidden="true">#</a> 四、管理表</h3><p>数据库连接成功后，最重要的还是操作表。</p><p><strong>01、查看表</strong></p><p>选择一张表，双击后就可以看到表的属性了，可以查看表的列、约束（主键）、外键、索引等等信息。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-12.png" alt=""></p><p>点击「DDL（Data Definition Language，数据定义语言）」可以看到详细的建表语句。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-13.png" alt=""></p><p>点击「数据」可以查看表的数据，底部有「新增」、「修改」、「删除」等行操作按钮。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-14.png" alt=""></p><p>可以在顶部的过滤框中填写筛选条件，然后直接查询结果。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-15.png" alt=""></p><p>如果不想显示某一列的话，可以直接点击「自定义结果集」图表，将某个字段的状态设置为不可见即可。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-16.png" alt=""></p><p><strong>02、新增表</strong></p><p>在左侧选择「表」，然后右键选择「新建表」即可建表id。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-17.png" alt=""></p><p>之后在右侧列的区域右键，选择「新建列」即可添加字段。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-18.png" alt=""></p><p>比如说我们新建一个主键 ID，如下图所示。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-19.png" alt=""></p><p>在 DBeaver 中，<code>[v]</code> 表示真，<code>[]</code> 表示否。紧接着在「约束」里选择 ID 将其设置为主键。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-20.png" alt=""></p><p>最后点击保存，会弹出一个建表语句的预览框，点击「执行」即可完成表的创建。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-21.png" alt=""></p><h3 id="五、执行-sql" tabindex="-1"><a class="header-anchor" href="#五、执行-sql" aria-hidden="true">#</a> 五、执行 SQL</h3><p>右键数据库表，选择右键菜单中的「SQL 编辑器」可以打开 SQL 编辑面板。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-22.png" alt=""></p><p>然后编辑 SQL 语句，点击运行的小图标就可以查询数据了。这个过程会有语法提示，非常 nice。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-23.png" alt=""></p><p>DBeaver 有一个很亮眼的操作就是，可以直接选中一条结果集，然后右键生成 SQL。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-24.png" alt=""></p><p>比如说 insert 语句，这样再插入一条重复性内容的时候就非常方便了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-25.png" alt=""></p><h3 id="六、外观配置" tabindex="-1"><a class="header-anchor" href="#六、外观配置" aria-hidden="true">#</a> 六、外观配置</h3><p>可以在首选项里对外观进行设置，比如说把主题修改为暗黑色。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-26.png" alt=""></p><p>然后界面就变成了暗黑系。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-27.png" alt=""></p><p>还可以设置字体大小等。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-28.png" alt=""></p><p>从整体的风格来看，DBeaver 和 Eclipse 有些类似，事实上也的确如此，DBeaver 是基于 Eclipse 平台构建的。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-29.png" alt=""></p><h3 id="七、总结" tabindex="-1"><a class="header-anchor" href="#七、总结" aria-hidden="true">#</a> 七、总结</h3><p>总体来说，DBeaver是一款非常优秀的开源数据库管理工具了，功能很全面，日常的开发基本上是够用了。对比收费的 Navicat 和 DataGrip，可以说非常良心了。大家如果遇到收费版不能使用的时候，可以来体验一下社区版 DBeaver。</p><p><img 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class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->DBeaver：一款免费的数据库操作工具</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年2月17日</span><meta property="datePublished" content="2022-02-17T00:37:41.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category5" role>Java企业级开发</li><meta property="articleSection" content="Java企业级开发"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag1" role>辅助工具/轮子</li></ul><meta property="keywords" content="辅助工具/轮子"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 5 分钟</span><meta property="timeRequired" content="PT5M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/DBeaver.html#一、关于-dbeaver" class="router-link-active router-link-exact-active toc-link level3">一、关于 DBeaver</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/DBeaver.html#二、安装-dbeaver" class="router-link-active router-link-exact-active toc-link level3">二、安装 DBeaver</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/DBeaver.html#三、管理数据源" class="router-link-active router-link-exact-active toc-link level3">三、管理数据源</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/DBeaver.html#四、管理表" class="router-link-active router-link-exact-active toc-link level3">四、管理表</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/DBeaver.html#五、执行-sql" class="router-link-active router-link-exact-active toc-link level3">五、执行 SQL</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/DBeaver.html#六、外观配置" class="router-link-active router-link-exact-active toc-link level3">六、外观配置</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/DBeaver.html#七、总结" class="router-link-active router-link-exact-active toc-link level3">七、总结</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><p>作为一名开发者，免不了要和数据库打交道，于是我们就需要一款顺手的数据库管理工具。很长一段时间里，Navicat 都是我的首选，但最近更换了一台新电脑，之前的绿色安装包找不到了。</p><p>于是就琢磨着，找一款免费的，功能和 Navicat 有一拼的数据库管理工具来替代。好朋友 macrozheng 给我推荐了 DBeaver，试用完后体验真心不错，于是就来给大家安利一波。</p><h3 id="一、关于-dbeaver" tabindex="-1"><a class="header-anchor" href="#一、关于-dbeaver" aria-hidden="true">#</a> 一、关于 DBeaver</h3><p>DBeaver 是一个跨平台的数据库管理工具，支持 Windows、Linux 和 macOS。它有两个版本，企业版和社区版，对于个人开发者来说，社区版的功能已经足够强大。</p><p>DBeaver 是由 Java 编写的，默认使用 JDK 11 进行编译。社区版基于 <a href="https://github.com/dbeaver/dbeaver/blob/devel/LICENSE.md" target="_blank" rel="noopener noreferrer">Apache-2.0 License<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a> 在 GitHub 上开源，目前已获得 24k+ 的星标。</p><blockquote><p><a href="https://github.com/dbeaver/dbeaver" target="_blank" rel="noopener noreferrer">https://github.com/dbeaver/dbeaver<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-1.png" alt=""></p><p>DBeaver 支持几乎所有主流的数据库，包括关系型数据库和非关系数据库。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-2.png" alt=""></p><h3 id="二、安装-dbeaver" tabindex="-1"><a class="header-anchor" href="#二、安装-dbeaver" aria-hidden="true">#</a> 二、安装 DBeaver</h3><p>可以通过 DBeaver 官方下载安装包，也可以通过 GitHub 下载 release 版本。</p><blockquote><p>官方下载地址：<a href="https://dbeaver.io/download/" target="_blank" rel="noopener noreferrer">https://dbeaver.io/download/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-3.png" alt=""></p><p>根据自己电脑的操作系统下载对应的安装包，完整安装后，第一步要做的是配置 Maven 镜像，否则在后续下载数据库驱动的时候会非常的慢。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-4.png" alt=""></p><p>因为 DBeaver 是基于 <a href="https://github.com/itwanger/toBeBetterJavaer/blob/master/docs/maven/maven.md" target="_blank" rel="noopener noreferrer">Maven 构建<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>的，数据库驱动也就是链接数据库的 JDBC 驱动是通过 Maven 仓库下载的。选择「首选项」→「Maven」，添加阿里云镜像地址：</p><blockquote><p><a href="http://maven.aliyun.com/nexus/content/groups/public" target="_blank" rel="noopener noreferrer">http://maven.aliyun.com/nexus/content/groups/public<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>和配置 Maven 镜像一样，如下图所示。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-5.png" alt=""></p><p>配置完成后，记得把阿里云镜像仓库置顶。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-6.png" alt=""></p><h3 id="三、管理数据源" tabindex="-1"><a class="header-anchor" href="#三、管理数据源" aria-hidden="true">#</a> 三、管理数据源</h3><p>像使用 Navicat 一样，我们需要先建立连接，这里就以 MySQL 为例。点击「连接」小图标，选择数据库。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-7.png" alt=""></p><p>点击下一步，这时候需要填写数据库连接信息。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-8.png" alt=""></p><p>点击「测试链接」，如果使用默认的 Maven 仓库时，下载驱动会非常慢，如下图所示，还容易失败「踩过的坑就不要再踩了」。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-9.png" alt=""></p><p>如果你前面按照我说的配置了阿里云的 Maven 镜像，程序就不一样了，点了「测试链接」，瞬间会弹出「连接已成功」的提示框。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-10.png" alt=""></p><p>链接成功后，就可以看到数据库中的表啊、视图啊、索引啊等等。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-11.png" alt=""></p><h3 id="四、管理表" tabindex="-1"><a class="header-anchor" href="#四、管理表" aria-hidden="true">#</a> 四、管理表</h3><p>数据库连接成功后，最重要的还是操作表。</p><p><strong>01、查看表</strong></p><p>选择一张表，双击后就可以看到表的属性了，可以查看表的列、约束（主键）、外键、索引等等信息。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-12.png" alt=""></p><p>点击「DDL（Data Definition Language，数据定义语言）」可以看到详细的建表语句。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-13.png" alt=""></p><p>点击「数据」可以查看表的数据，底部有「新增」、「修改」、「删除」等行操作按钮。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-14.png" alt=""></p><p>可以在顶部的过滤框中填写筛选条件，然后直接查询结果。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-15.png" alt=""></p><p>如果不想显示某一列的话，可以直接点击「自定义结果集」图表，将某个字段的状态设置为不可见即可。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-16.png" alt=""></p><p><strong>02、新增表</strong></p><p>在左侧选择「表」，然后右键选择「新建表」即可建表id。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-17.png" alt=""></p><p>之后在右侧列的区域右键，选择「新建列」即可添加字段。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-18.png" alt=""></p><p>比如说我们新建一个主键 ID，如下图所示。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-19.png" alt=""></p><p>在 DBeaver 中，<code>[v]</code> 表示真，<code>[]</code> 表示否。紧接着在「约束」里选择 ID 将其设置为主键。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-20.png" alt=""></p><p>最后点击保存，会弹出一个建表语句的预览框，点击「执行」即可完成表的创建。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-21.png" alt=""></p><h3 id="五、执行-sql" tabindex="-1"><a class="header-anchor" href="#五、执行-sql" aria-hidden="true">#</a> 五、执行 SQL</h3><p>右键数据库表，选择右键菜单中的「SQL 编辑器」可以打开 SQL 编辑面板。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-22.png" alt=""></p><p>然后编辑 SQL 语句，点击运行的小图标就可以查询数据了。这个过程会有语法提示，非常 nice。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-23.png" alt=""></p><p>DBeaver 有一个很亮眼的操作就是，可以直接选中一条结果集，然后右键生成 SQL。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-24.png" alt=""></p><p>比如说 insert 语句，这样再插入一条重复性内容的时候就非常方便了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-25.png" alt=""></p><h3 id="六、外观配置" tabindex="-1"><a class="header-anchor" href="#六、外观配置" aria-hidden="true">#</a> 六、外观配置</h3><p>可以在首选项里对外观进行设置，比如说把主题修改为暗黑色。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-26.png" alt=""></p><p>然后界面就变成了暗黑系。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-27.png" alt=""></p><p>还可以设置字体大小等。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-28.png" alt=""></p><p>从整体的风格来看，DBeaver 和 Eclipse 有些类似，事实上也的确如此，DBeaver 是基于 Eclipse 平台构建的。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/DBeaver-29.png" alt=""></p><h3 id="七、总结" tabindex="-1"><a class="header-anchor" href="#七、总结" aria-hidden="true">#</a> 七、总结</h3><p>总体来说，DBeaver是一款非常优秀的开源数据库管理工具了，功能很全面，日常的开发基本上是够用了。对比收费的 Navicat 和 DataGrip，可以说非常良心了。大家如果遇到收费版不能使用的时候，可以来体验一下社区版 DBeaver。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/gongju/DBeaver.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg 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class="title">3.3 Spring</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.4 SpringBoot</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">3.5 辅助工具</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/gongju/tabby.html" class="nav-link sidebar-link sidebar-page" aria-label="高逼格终端工具Tabby"><!---->高逼格终端工具Tabby<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/gongju/warp.html" class="nav-link sidebar-link sidebar-page" aria-label="21世纪人用的终端工具Warp"><!---->21世纪人用的终端工具Warp<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/gongju/choco.html" class="nav-link sidebar-link sidebar-page" aria-label="Win命令行软件管理器Chocolatey"><!---->Win命令行软件管理器Chocolatey<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/gongju/chiner.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="数据库设计神器chiner"><!---->数据库设计神器chiner<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/gongju/chiner.html#一、关于-powerdesigner" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="一、关于 PowerDesigner"><!---->一、关于 PowerDesigner<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/gongju/chiner.html#二、关于-chiner" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="二、关于 chiner"><!---->二、关于 chiner<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/gongju/chiner.html#三、安装-chiner" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="三、安装 chiner"><!---->三、安装 chiner<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/gongju/chiner.html#四、上手-chiner" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="四、上手 chiner"><!---->四、上手 chiner<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/gongju/chiner.html#五、尾声" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="五、尾声"><!---->五、尾声<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/gongju/DBeaver.html" class="nav-link sidebar-link sidebar-page" aria-label="数据库操作工具DBeaver"><!---->数据库操作工具DBeaver<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/gongju/baota-mianban.md" class="nav-link sidebar-link sidebar-page" aria-label="/gongju/baota-mianban.md"><!---->/gongju/baota-mianban.md<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.6 开源轮子</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.7 分布式</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.8 消息队列</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->chiner：一款开源的数据库设计神器</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年1月25日</span><meta property="datePublished" content="2022-01-25T10:41:26.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category5" role>Java企业级开发</li><meta property="articleSection" content="Java企业级开发"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag1" role>辅助工具/轮子</li></ul><meta property="keywords" content="辅助工具/轮子"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 5 分钟</span><meta property="timeRequired" content="PT5M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/chiner.html#一、关于-powerdesigner" class="router-link-active router-link-exact-active toc-link level3">一、关于 PowerDesigner</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/chiner.html#二、关于-chiner" class="router-link-active router-link-exact-active toc-link level3">二、关于 chiner</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/chiner.html#三、安装-chiner" class="router-link-active router-link-exact-active toc-link level3">三、安装 chiner</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/chiner.html#四、上手-chiner" class="router-link-active router-link-exact-active toc-link level3">四、上手 chiner</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/chiner.html#五、尾声" class="router-link-active router-link-exact-active toc-link level3">五、尾声</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><p>最近在造轮子，从 0 到 1 的那种，就差前台的界面了，大家可以耐心耐心耐心期待一下。其中需要设计一些数据库表，可以通过 Navicat 这种图形化管理工具直接开搞，也可以通过一些数据库设计工具来搞，比如说 PowerDesigner，更专业一点。</p><p>今天我给大家推荐的这款国人开源的数据库设计工具 chiner，界面漂亮，功能强大，体验后给我的感觉是真香......</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-1.png" alt=""></p><h3 id="一、关于-powerdesigner" tabindex="-1"><a class="header-anchor" href="#一、关于-powerdesigner" aria-hidden="true">#</a> 一、关于 PowerDesigner</h3><p>PowerDesigner 是一款功能非常强大的建模工具，可以和 Rational Rose 媲美。Rose 专攻 UML 对象模型的建模，之后才拓展到数据库这块。而 PowerDesigner 是一开始就为数据库建模服务的，后来才发展为一款综合战斗力都还不错的建模工具。</p><p>不过，说句实在话，PowerDesigner 的界面偏古典一些，下面是我用 PowerDesigner 设计 DB 的效果。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-2.png" alt=""></p><h3 id="二、关于-chiner" tabindex="-1"><a class="header-anchor" href="#二、关于-chiner" aria-hidden="true">#</a> 二、关于 chiner</h3><p>chiner，发音：[kaɪˈnər]，使用React+Electron+Java技术体系构建的一款元数建模平台。</p><p>2018 年，作者和几个对开源有兴趣的社区好友开始打磨产品的原因，历经三代，直到 2021 年 7 月份，终于推出了船新的 3.0 版本。</p><p>2019 年底，团队差点解散，幸好有几位好友关照，给了团队两个项目做，这才算是熬了过去。</p><p>不得不说，做任何一件事情都不容易啊，光靠情怀也许可以撑过产品初期，但越往后去，遇到生存问题时，就会非常困难。</p><p>在此，我们必须得为每一位开源作者奉上最真诚的掌声，希望他们的产品都能有一番天地。也希望，未来我的产品出现在大家的面前时，能给它多一点点包容和支持。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-3.gif" alt=""></p><h3 id="三、安装-chiner" tabindex="-1"><a class="header-anchor" href="#三、安装-chiner" aria-hidden="true">#</a> 三、安装 chiner</h3><p>chiner 支持 Windows、macOS 和 Linux，下载地址如下所示：</p><blockquote><p><a href="https://gitee.com/robergroup/chiner/releases" target="_blank" rel="noopener noreferrer">https://gitee.com/robergroup/chiner/releases<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>码云做了外部链接的拦截，导致直接复制链接到地址栏才能完成下载。我这里以 macOS 为例。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-4.png" alt=""></p><p>安装完成后首次打开的样子是这样的。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-5.png" alt=""></p><p>chiner 提供了非常贴心的操作手册和参考模板，如果时间比较充分的话，可以先把操作手册过一遍，写得非常详细。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-6.png" alt=""></p><h3 id="四、上手-chiner" tabindex="-1"><a class="header-anchor" href="#四、上手-chiner" aria-hidden="true">#</a> 四、上手 chiner</h3><p><strong>01、导入导出</strong></p><p>因为我之前有一份 PowerDesigner 文件，所以可以直接导入到 chiner。</p><p>第一步，新建一个项目 codingmore。</p><p>第二步，选择导入 PowerDesigner 文件。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-7.png" alt=""></p><p>第三步，选择要添加的数据表。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-8.png" alt=""></p><p>第四步，导入完成后，就可以点开单表进行查看了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-9.png" alt=""></p><p>第五步，当完成重新设计后，就可以选择导出 DDL 到数据库表了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-10.png" alt=""></p><p>当然了，也可以直接配置数据库 DB，这样就可以直接连接导入导出了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-11.png" alt=""></p><p>导出的 SQL 文件可以直接通过宝塔面板上传到服务器端，然后再直接导入到数据库。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-12.png" alt=""></p><p>如果需要用到数据库说明文档的话，也可以直接通过导出到 Word 文档来完成。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-13.png" alt=""></p><p><strong>02、维护数据类型</strong></p><p>chiner 自带了几种常见的数据类型，比如字串、小数、日期等，我们也可以根据自己的需要添加新的数据类型。</p><p>比如说默认的字串类型关联到其他数据库的类型如下所示：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-14.png" alt=""></p><p>数据域是在数据类型的基础上，基于当前项目定义的有一定业务含义的数据类型，比如说我这里维护了一个长度为 90 的名称数据域。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-15.png" alt=""></p><p>当我需要把某个数据字段的数据域设置成「名称」的时候，长度就会自动填充为 90，不需要手动再去设置。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-16.png" alt=""></p><p><strong>03、维护数据表</strong></p><p>第一步，选中数据表，右键选择「新增数据表」</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-17.png" alt=""></p><p>第二步，填写数据表名</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-18.png" alt=""></p><p>点击「确定」后，chiner 会帮我们自动生成一些常见常用的字段，比如说创建人、创建时间、更新人、更新时间等，非常的智能化。通常来说，这些字段都是必须的。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-19.png" alt=""></p><p>如果这些默认字段不满足需求的时候，还可以点击「设置」新增默认字段，比如说删除标记，一般来说为了安全起见，数据库都会采用非物理删除。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-20.png" alt=""></p><p>一般来说，我们更习惯字段小写命名，因此可以直接选中一列，然后选择大小写转换。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-21.png" alt=""></p><p>就变成小写了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-22.png" alt=""></p><p><strong>04、维护关系图</strong></p><p>第一步，选择「关系图」，右键选择「新增关系图」</p><p>第二步，把需要关联的表拖拽到右侧的面板当中，然后按照字段进行连线，非常的方便。比如说班级和学院表、班级和专业表的关系，就如下图所示。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-23.png" alt=""></p><p>来看一下整体给出来的关系图，还是非常清爽的。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-24.png" alt=""></p><h3 id="五、尾声" tabindex="-1"><a class="header-anchor" href="#五、尾声" aria-hidden="true">#</a> 五、尾声</h3><p>chiner 还有更多更强大的功能，大家觉得不错的话，可以去尝试一下。用的熟练的话，肯定能在很大程度上提高生产效率。</p><p>就我个人的使用体验来说，chiner 比 PowerDesigner 更轻量级，也更符合日常的操作习惯，为国产开源点赞！</p><p>项目地址：</p><blockquote><p><a href="https://gitee.com/robergroup/chiner" target="_blank" rel="noopener noreferrer">https://gitee.com/robergroup/chiner<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>使用手册：</p><blockquote><p><a href="https://www.yuque.com/chiner/docs/manual" target="_blank" rel="noopener noreferrer">https://www.yuque.com/chiner/docs/manual<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" 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class="sidebar-sub-header"><a aria-current="page" href="/gongju/chiner.html#一、关于-powerdesigner" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="一、关于 PowerDesigner"><!---->一、关于 PowerDesigner<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/gongju/chiner.html#二、关于-chiner" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="二、关于 chiner"><!---->二、关于 chiner<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/gongju/chiner.html#三、安装-chiner" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="三、安装 chiner"><!---->三、安装 chiner<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/gongju/chiner.html#四、上手-chiner" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="四、上手 chiner"><!---->四、上手 chiner<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/gongju/chiner.html#五、尾声" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="五、尾声"><!---->五、尾声<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/gongju/DBeaver.html" class="nav-link sidebar-link sidebar-page" aria-label="数据库操作工具DBeaver"><!---->数据库操作工具DBeaver<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/gongju/baota-mianban.md" class="nav-link sidebar-link sidebar-page" aria-label="/gongju/baota-mianban.md"><!---->/gongju/baota-mianban.md<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.6 开源轮子</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.7 分布式</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.8 消息队列</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->chiner：一款开源的数据库设计神器</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年1月25日</span><meta property="datePublished" content="2022-01-25T10:41:26.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category5" role>Java企业级开发</li><meta property="articleSection" content="Java企业级开发"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag1" role>辅助工具/轮子</li></ul><meta property="keywords" content="辅助工具/轮子"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 5 分钟</span><meta property="timeRequired" content="PT5M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/chiner.html#一、关于-powerdesigner" class="router-link-active router-link-exact-active toc-link level3">一、关于 PowerDesigner</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/chiner.html#二、关于-chiner" class="router-link-active router-link-exact-active toc-link level3">二、关于 chiner</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/chiner.html#三、安装-chiner" class="router-link-active router-link-exact-active toc-link level3">三、安装 chiner</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/chiner.html#四、上手-chiner" class="router-link-active router-link-exact-active toc-link level3">四、上手 chiner</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/chiner.html#五、尾声" class="router-link-active router-link-exact-active toc-link level3">五、尾声</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><p>最近在造轮子，从 0 到 1 的那种，就差前台的界面了，大家可以耐心耐心耐心期待一下。其中需要设计一些数据库表，可以通过 Navicat 这种图形化管理工具直接开搞，也可以通过一些数据库设计工具来搞，比如说 PowerDesigner，更专业一点。</p><p>今天我给大家推荐的这款国人开源的数据库设计工具 chiner，界面漂亮，功能强大，体验后给我的感觉是真香......</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-1.png" alt=""></p><h3 id="一、关于-powerdesigner" tabindex="-1"><a class="header-anchor" href="#一、关于-powerdesigner" aria-hidden="true">#</a> 一、关于 PowerDesigner</h3><p>PowerDesigner 是一款功能非常强大的建模工具，可以和 Rational Rose 媲美。Rose 专攻 UML 对象模型的建模，之后才拓展到数据库这块。而 PowerDesigner 是一开始就为数据库建模服务的，后来才发展为一款综合战斗力都还不错的建模工具。</p><p>不过，说句实在话，PowerDesigner 的界面偏古典一些，下面是我用 PowerDesigner 设计 DB 的效果。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-2.png" alt=""></p><h3 id="二、关于-chiner" tabindex="-1"><a class="header-anchor" href="#二、关于-chiner" aria-hidden="true">#</a> 二、关于 chiner</h3><p>chiner，发音：[kaɪˈnər]，使用React+Electron+Java技术体系构建的一款元数建模平台。</p><p>2018 年，作者和几个对开源有兴趣的社区好友开始打磨产品的原因，历经三代，直到 2021 年 7 月份，终于推出了船新的 3.0 版本。</p><p>2019 年底，团队差点解散，幸好有几位好友关照，给了团队两个项目做，这才算是熬了过去。</p><p>不得不说，做任何一件事情都不容易啊，光靠情怀也许可以撑过产品初期，但越往后去，遇到生存问题时，就会非常困难。</p><p>在此，我们必须得为每一位开源作者奉上最真诚的掌声，希望他们的产品都能有一番天地。也希望，未来我的产品出现在大家的面前时，能给它多一点点包容和支持。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-3.gif" alt=""></p><h3 id="三、安装-chiner" tabindex="-1"><a class="header-anchor" href="#三、安装-chiner" aria-hidden="true">#</a> 三、安装 chiner</h3><p>chiner 支持 Windows、macOS 和 Linux，下载地址如下所示：</p><blockquote><p><a href="https://gitee.com/robergroup/chiner/releases" target="_blank" rel="noopener noreferrer">https://gitee.com/robergroup/chiner/releases<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>码云做了外部链接的拦截，导致直接复制链接到地址栏才能完成下载。我这里以 macOS 为例。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-4.png" alt=""></p><p>安装完成后首次打开的样子是这样的。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-5.png" alt=""></p><p>chiner 提供了非常贴心的操作手册和参考模板，如果时间比较充分的话，可以先把操作手册过一遍，写得非常详细。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-6.png" alt=""></p><h3 id="四、上手-chiner" tabindex="-1"><a class="header-anchor" href="#四、上手-chiner" aria-hidden="true">#</a> 四、上手 chiner</h3><p><strong>01、导入导出</strong></p><p>因为我之前有一份 PowerDesigner 文件，所以可以直接导入到 chiner。</p><p>第一步，新建一个项目 codingmore。</p><p>第二步，选择导入 PowerDesigner 文件。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-7.png" alt=""></p><p>第三步，选择要添加的数据表。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-8.png" alt=""></p><p>第四步，导入完成后，就可以点开单表进行查看了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-9.png" alt=""></p><p>第五步，当完成重新设计后，就可以选择导出 DDL 到数据库表了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-10.png" alt=""></p><p>当然了，也可以直接配置数据库 DB，这样就可以直接连接导入导出了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-11.png" alt=""></p><p>导出的 SQL 文件可以直接通过宝塔面板上传到服务器端，然后再直接导入到数据库。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-12.png" alt=""></p><p>如果需要用到数据库说明文档的话，也可以直接通过导出到 Word 文档来完成。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-13.png" alt=""></p><p><strong>02、维护数据类型</strong></p><p>chiner 自带了几种常见的数据类型，比如字串、小数、日期等，我们也可以根据自己的需要添加新的数据类型。</p><p>比如说默认的字串类型关联到其他数据库的类型如下所示：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-14.png" alt=""></p><p>数据域是在数据类型的基础上，基于当前项目定义的有一定业务含义的数据类型，比如说我这里维护了一个长度为 90 的名称数据域。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-15.png" alt=""></p><p>当我需要把某个数据字段的数据域设置成「名称」的时候，长度就会自动填充为 90，不需要手动再去设置。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-16.png" alt=""></p><p><strong>03、维护数据表</strong></p><p>第一步，选中数据表，右键选择「新增数据表」</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-17.png" alt=""></p><p>第二步，填写数据表名</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-18.png" alt=""></p><p>点击「确定」后，chiner 会帮我们自动生成一些常见常用的字段，比如说创建人、创建时间、更新人、更新时间等，非常的智能化。通常来说，这些字段都是必须的。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-19.png" alt=""></p><p>如果这些默认字段不满足需求的时候，还可以点击「设置」新增默认字段，比如说删除标记，一般来说为了安全起见，数据库都会采用非物理删除。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-20.png" alt=""></p><p>一般来说，我们更习惯字段小写命名，因此可以直接选中一列，然后选择大小写转换。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-21.png" alt=""></p><p>就变成小写了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-22.png" alt=""></p><p><strong>04、维护关系图</strong></p><p>第一步，选择「关系图」，右键选择「新增关系图」</p><p>第二步，把需要关联的表拖拽到右侧的面板当中，然后按照字段进行连线，非常的方便。比如说班级和学院表、班级和专业表的关系，就如下图所示。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-23.png" alt=""></p><p>来看一下整体给出来的关系图，还是非常清爽的。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/chiner-24.png" alt=""></p><h3 id="五、尾声" tabindex="-1"><a class="header-anchor" href="#五、尾声" aria-hidden="true">#</a> 五、尾声</h3><p>chiner 还有更多更强大的功能，大家觉得不错的话，可以去尝试一下。用的熟练的话，肯定能在很大程度上提高生产效率。</p><p>就我个人的使用体验来说，chiner 比 PowerDesigner 更轻量级，也更符合日常的操作习惯，为国产开源点赞！</p><p>项目地址：</p><blockquote><p><a href="https://gitee.com/robergroup/chiner" target="_blank" rel="noopener noreferrer">https://gitee.com/robergroup/chiner<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span 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class="title">3.3 Spring</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.4 SpringBoot</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">3.5 辅助工具</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/gongju/tabby.html" class="nav-link sidebar-link sidebar-page" aria-label="高逼格终端工具Tabby"><!---->高逼格终端工具Tabby<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/gongju/warp.html" class="nav-link sidebar-link sidebar-page" aria-label="21世纪人用的终端工具Warp"><!---->21世纪人用的终端工具Warp<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/gongju/choco.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="Win命令行软件管理器Chocolatey"><!---->Win命令行软件管理器Chocolatey<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/gongju/choco.html#先来了解-shell" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="先来了解 shell"><!---->先来了解 shell<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/gongju/choco.html#再来了解chocolatey" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="再来了解chocolatey"><!---->再来了解chocolatey<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/gongju/choco.html#小结" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="小结"><!---->小结<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/gongju/chiner.html" class="nav-link sidebar-link sidebar-page" aria-label="数据库设计神器chiner"><!---->数据库设计神器chiner<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/gongju/DBeaver.html" class="nav-link sidebar-link sidebar-page" aria-label="数据库操作工具DBeaver"><!---->数据库操作工具DBeaver<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/gongju/baota-mianban.md" class="nav-link sidebar-link sidebar-page" aria-label="/gongju/baota-mianban.md"><!---->/gongju/baota-mianban.md<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.6 开源轮子</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.7 分布式</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.8 消息队列</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->chocolatey：一款 GitHub 星标 8.2k+的Windows命令行软件管理器</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年5月24日</span><meta property="datePublished" content="2022-05-24T09:00:49.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category5" role>Java企业级开发</li><meta property="articleSection" content="Java企业级开发"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag1" role>辅助工具/轮子</li></ul><meta property="keywords" content="辅助工具/轮子"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 6 分钟</span><meta property="timeRequired" content="PT6M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/choco.html#先来了解-shell" class="router-link-active router-link-exact-active toc-link level3">先来了解 shell</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/choco.html#再来了解chocolatey" class="router-link-active router-link-exact-active toc-link level3">再来了解chocolatey</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/choco.html#小结" class="router-link-active router-link-exact-active toc-link level3">小结</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><p>小二是公司新来的实习生，之前面试的过程中对答如流，所以我非常看好他。第一天，我给他了一台新电脑，要他先在本地搭建个 Java 开发环境。</p><p>二话不说，他就开始马不停蹄地行动了。<strong>真没想到，他竟然是通过命令行的方式安装的 JDK，一行命令就搞定了！连环境变量都不用配置，这远远超出了我对他的预期</strong>。</p><p>我以为，他会傻乎乎地下一步下一步来安装 JDK，就像这样。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/choco-9050933d-61f2-4d79-bad7-982803fc174a" alt=""></p><p>然后这样配置环境变量。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/choco-4adb249c-a662-42af-9c7e-08deeb11c835" alt=""></p><p>结果他是这样的，就一行命令，环境变量也不用配置！</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/choco-5c996f2a-6d14-4f9d-acd4-ff1cf959b55f" alt=""></p><p>卧槽！牛逼高大上啊！</p><p>看着他熟练地在命令行里安装 JDK 的样子，我的嘴角开始微微上扬，真不错！这次总算招到了一个靠谱的。</p><p>于是我就安排他做一个记录，打算发表在我的小破站《Java 程序员进阶之路》上。从他嘴里了解到，他用的命令行软件管理器叫 chocolatey，这是一个Windows下的命令行软件管理器，在 GitHub 上已经收获 8.2k+的星标，可以方便开发者像在Linux下使用yum命令来安装软件，或者像在macOS下使用brew 命令来安装软件，非常酷炫。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/choco-c598af06-7a85-47ca-ade4-e07c60463990" alt=""></p><p>以下是他的记录，一起来欣赏下。</p><h3 id="先来了解-shell" tabindex="-1"><a class="header-anchor" href="#先来了解-shell" aria-hidden="true">#</a> 先来了解 shell</h3><p>对于一名 Java 后端程序员来说，初学阶段，你可以选择在 IDE 中直接编译运行 Java 代码，但有时候也需要在 Shell 下编译和运行 Java 代码。</p><blockquote><p>Windows 下自带的 Shell 叫命令提示符，或者 cmd 或者 powershell，macOS 下叫终端 terminal。</p></blockquote><p>但当你需要在生产环境下部署 Java项目或者查看日志的话，就必然会用到 Shell，这个阶段，Shell 的使用频率高到可以用一个成语来形容——朝夕相伴。</p><p>一些第三方软件会在原生的 Shell 基础上提供更强大的功能，常见的有 tabby、Warp、xhsell、FinalShell、MobaXterm、Aechoterm、WindTerm、termius、iterm2 等等，有些只能在 Windows 上使用，有些只能在 macOS 上使用，有些支持全平台。还有 ohmyzsh 这种超神的 Shell 美化工具。</p><p>这里，我们列举一些 Shell 的基本操作命令（Windows 和 macOS/Linux 有些许差异）：</p><ul><li>切换目录，可以使用 cd 命令切换目录，<code>cd ..</code> 返回上级目录。</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/choco-b329cba9-4982-44ec-9935-3c9eb5b92eab" alt=""></p><ul><li>目录列表，macos/linux 下可以使用 ls 命令列出目录下所有的文件和子目录（Windows 下使用 dir 命令），使用通配符 <code>*</code> 对展示的内容进行过滤，比如 <code>ls *.java</code> 列出所有 <code>.java</code>后缀的文件，如果想更进一步的话，可以使用 <code>ls H*.java</code> 列出所有以 H 开头 <code>.java</code> 后缀的文件。</li><li>新建目录，macOS/Linux 下可以使用 mkdir 命令新建一个目录（比如 <code>mkdir hello</code> 可以新建一个 hello 的目录），Windows 下可以使用 md 命令。</li><li>删除文件，macOS/Linux 下可以使用 <code>rm</code> 命令删除文件（比如 <code>rm hello.java</code> 删除 hello.java 文件），Windows 下可以使用 del 命令。</li><li>删除目录，macOS/Linux 下可以使用 <code>rm -r</code> 命令删除目录以及它所包含的所有文件（比如说 <code>rm -r hello</code> 删除 hello 目录）。Windows 下可以使用 deltree 命令。</li><li>重复命令，macOS/Linux/Windows 下都可以使用上下箭头来选择以往执行过的命令。</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/choco-bdd0a107-512d-4906-9555-38fe06d24d5a" alt=""></p><ul><li>命令历史，macOS/Linux 下可以使用 <code>history</code> 命令查看所有使用过的命令。Windows 可以按下 F7 键。</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/choco-d6425fe6-1501-412e-9642-990864e6f810" alt=""></p><ul><li>解压文件，后缀名为“.zip”的文件是一个包含了其他文件的压缩包，macOS/Linux 系统自身已经提供了用于解压的 unzip 命令， Windows 的话需要手动安装。</li></ul><h3 id="再来了解chocolatey" tabindex="-1"><a class="header-anchor" href="#再来了解chocolatey" aria-hidden="true">#</a> 再来了解chocolatey</h3><p>先安装 chocolatey。这是一个Windows下的命令行软件管理器，可以方便开发者像在Linux下使用yum命令来安装软件，或者像在macOS下使用brew 命令来安装软件，非常酷炫。</p><blockquote><p>The biggest challenge is reducing duplication of effort, so users turn to Chocolatey for simplicity</p></blockquote><p>传统的安装方式要么非常耗时，要么非常低效，在命令行安装软件除了简单高效，还能自动帮我们配置环境变量。</p><blockquote><ul><li>官方地址：<a href="https://chocolatey.org/" target="_blank" rel="noopener noreferrer">https://chocolatey.org/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li>安装文档：<a href="https://chocolatey.org/install#individual" target="_blank" rel="noopener noreferrer">https://chocolatey.org/install#individual<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul></blockquote><p>第一步，以管理员的身份打开 cmd 命令行。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/choco-f01fb23b-9ca5-4997-acc3-26ebd7da060f" alt=""></p><p>第二步，执行以下命令：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>Set-ExecutionPolicy Bypass -Scope Process -Force; [System.Net.ServicePointManager]::SecurityProtocol = [System.Net.ServicePointManager]::SecurityProtocol -bor 3072; iex ((New-Object System.Net.WebClient).DownloadString(&#39;https://community.chocolatey.org/install.ps1&#39;))
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clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->chocolatey：一款 GitHub 星标 8.2k+的Windows命令行软件管理器</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年5月24日</span><meta property="datePublished" content="2022-05-24T09:00:49.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category5" role>Java企业级开发</li><meta property="articleSection" content="Java企业级开发"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag1" role>辅助工具/轮子</li></ul><meta property="keywords" content="辅助工具/轮子"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 6 分钟</span><meta property="timeRequired" content="PT6M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/choco.html#先来了解-shell" class="router-link-active router-link-exact-active toc-link level3">先来了解 shell</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/choco.html#再来了解chocolatey" class="router-link-active router-link-exact-active toc-link level3">再来了解chocolatey</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/choco.html#小结" class="router-link-active router-link-exact-active toc-link level3">小结</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><p>小二是公司新来的实习生，之前面试的过程中对答如流，所以我非常看好他。第一天，我给他了一台新电脑，要他先在本地搭建个 Java 开发环境。</p><p>二话不说，他就开始马不停蹄地行动了。<strong>真没想到，他竟然是通过命令行的方式安装的 JDK，一行命令就搞定了！连环境变量都不用配置，这远远超出了我对他的预期</strong>。</p><p>我以为，他会傻乎乎地下一步下一步来安装 JDK，就像这样。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/choco-9050933d-61f2-4d79-bad7-982803fc174a" alt=""></p><p>然后这样配置环境变量。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/choco-4adb249c-a662-42af-9c7e-08deeb11c835" alt=""></p><p>结果他是这样的，就一行命令，环境变量也不用配置！</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/choco-5c996f2a-6d14-4f9d-acd4-ff1cf959b55f" alt=""></p><p>卧槽！牛逼高大上啊！</p><p>看着他熟练地在命令行里安装 JDK 的样子，我的嘴角开始微微上扬，真不错！这次总算招到了一个靠谱的。</p><p>于是我就安排他做一个记录，打算发表在我的小破站《Java 程序员进阶之路》上。从他嘴里了解到，他用的命令行软件管理器叫 chocolatey，这是一个Windows下的命令行软件管理器，在 GitHub 上已经收获 8.2k+的星标，可以方便开发者像在Linux下使用yum命令来安装软件，或者像在macOS下使用brew 命令来安装软件，非常酷炫。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/choco-c598af06-7a85-47ca-ade4-e07c60463990" alt=""></p><p>以下是他的记录，一起来欣赏下。</p><h3 id="先来了解-shell" tabindex="-1"><a class="header-anchor" href="#先来了解-shell" aria-hidden="true">#</a> 先来了解 shell</h3><p>对于一名 Java 后端程序员来说，初学阶段，你可以选择在 IDE 中直接编译运行 Java 代码，但有时候也需要在 Shell 下编译和运行 Java 代码。</p><blockquote><p>Windows 下自带的 Shell 叫命令提示符，或者 cmd 或者 powershell，macOS 下叫终端 terminal。</p></blockquote><p>但当你需要在生产环境下部署 Java项目或者查看日志的话，就必然会用到 Shell，这个阶段，Shell 的使用频率高到可以用一个成语来形容——朝夕相伴。</p><p>一些第三方软件会在原生的 Shell 基础上提供更强大的功能，常见的有 tabby、Warp、xhsell、FinalShell、MobaXterm、Aechoterm、WindTerm、termius、iterm2 等等，有些只能在 Windows 上使用，有些只能在 macOS 上使用，有些支持全平台。还有 ohmyzsh 这种超神的 Shell 美化工具。</p><p>这里，我们列举一些 Shell 的基本操作命令（Windows 和 macOS/Linux 有些许差异）：</p><ul><li>切换目录，可以使用 cd 命令切换目录，<code>cd ..</code> 返回上级目录。</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/choco-b329cba9-4982-44ec-9935-3c9eb5b92eab" alt=""></p><ul><li>目录列表，macos/linux 下可以使用 ls 命令列出目录下所有的文件和子目录（Windows 下使用 dir 命令），使用通配符 <code>*</code> 对展示的内容进行过滤，比如 <code>ls *.java</code> 列出所有 <code>.java</code>后缀的文件，如果想更进一步的话，可以使用 <code>ls H*.java</code> 列出所有以 H 开头 <code>.java</code> 后缀的文件。</li><li>新建目录，macOS/Linux 下可以使用 mkdir 命令新建一个目录（比如 <code>mkdir hello</code> 可以新建一个 hello 的目录），Windows 下可以使用 md 命令。</li><li>删除文件，macOS/Linux 下可以使用 <code>rm</code> 命令删除文件（比如 <code>rm hello.java</code> 删除 hello.java 文件），Windows 下可以使用 del 命令。</li><li>删除目录，macOS/Linux 下可以使用 <code>rm -r</code> 命令删除目录以及它所包含的所有文件（比如说 <code>rm -r hello</code> 删除 hello 目录）。Windows 下可以使用 deltree 命令。</li><li>重复命令，macOS/Linux/Windows 下都可以使用上下箭头来选择以往执行过的命令。</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/choco-bdd0a107-512d-4906-9555-38fe06d24d5a" alt=""></p><ul><li>命令历史，macOS/Linux 下可以使用 <code>history</code> 命令查看所有使用过的命令。Windows 可以按下 F7 键。</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/choco-d6425fe6-1501-412e-9642-990864e6f810" alt=""></p><ul><li>解压文件，后缀名为“.zip”的文件是一个包含了其他文件的压缩包，macOS/Linux 系统自身已经提供了用于解压的 unzip 命令， Windows 的话需要手动安装。</li></ul><h3 id="再来了解chocolatey" tabindex="-1"><a class="header-anchor" href="#再来了解chocolatey" aria-hidden="true">#</a> 再来了解chocolatey</h3><p>先安装 chocolatey。这是一个Windows下的命令行软件管理器，可以方便开发者像在Linux下使用yum命令来安装软件，或者像在macOS下使用brew 命令来安装软件，非常酷炫。</p><blockquote><p>The biggest challenge is reducing duplication of effort, so users turn to Chocolatey for simplicity</p></blockquote><p>传统的安装方式要么非常耗时，要么非常低效，在命令行安装软件除了简单高效，还能自动帮我们配置环境变量。</p><blockquote><ul><li>官方地址：<a href="https://chocolatey.org/" target="_blank" rel="noopener noreferrer">https://chocolatey.org/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li>安装文档：<a href="https://chocolatey.org/install#individual" target="_blank" rel="noopener noreferrer">https://chocolatey.org/install#individual<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul></blockquote><p>第一步，以管理员的身份打开 cmd 命令行。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/choco-f01fb23b-9ca5-4997-acc3-26ebd7da060f" alt=""></p><p>第二步，执行以下命令：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>Set-ExecutionPolicy Bypass -Scope Process -Force; [System.Net.ServicePointManager]::SecurityProtocol = [System.Net.ServicePointManager]::SecurityProtocol -bor 3072; iex ((New-Object System.Net.WebClient).DownloadString(&#39;https://community.chocolatey.org/install.ps1&#39;))
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>稍等片刻，就完成安装了。</p><p>安装完成后如下图所示：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/choco-e9696a71-ceb5-4c62-b39f-876f742b6435" alt=""></p><p>如果不确定是否安装成功的话，可以通过键入 <code>choco</code> 命令来确认。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/choco-211a2335-d3e1-49b5-8735-feabacf8087e" alt=""></p><p>这里推荐几个非常高效的操作命令：</p><ul><li>choco search xxx，查找 xxx 安装包</li><li>choco info xxx，查看 xxx 安装包信息</li><li>choco install xxx，安装 xxx 软件</li><li>choco upgrade xxx，升级 xxx 软件</li><li>choco uninstall xxx， 卸载 xxx 软件</li></ul><p>如何知道 chocolatey 仓库中都有哪些安装包可用呢？</p><p>可以通过上面提到的命令行的方式，也可以访问官方仓库进行筛选。</p><blockquote><p><a href="https://community.chocolatey.org/packages" target="_blank" rel="noopener noreferrer">https://community.chocolatey.org/packages<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>比如说我们来查找 Java。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/choco-a4bdc885-22a9-4307-b4b6-cd1ad1f0ba8b" alt=""></p><p>好，现在可以直接在shell中键入 <code>choco install jdk8</code> 来安装 JDK8 了，并且会自动将Java加入到环境变量中，不用再去「我的电脑」「环境变量」中新建 JAVA_HOME 并复制 JDK 安装路径配置 PATH 变量了，是不是非常 nice？</p><p>稍等片刻，键入 <code>java -version</code> 就可以确认Java是否安装成功了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/choco-80a6ced8-c25d-4371-8096-b95be48af768" alt=""></p><p>不得不承认！非常nice！</p><p>再比如说安装 Redis，只需要找到 Redis 的安装命令在 Choco 下执行一下就 OK 了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/choco-488b71e7-8082-45b7-b454-3187938bf101" alt=""></p><p>安装 Git：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>choco install git.install 
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>安装 node.js</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>choco install nodejs.install 
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>安装 7zip</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>choco install 7zip
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>安装 <strong>Filezilla</strong></p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>choco install filezilla
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>Choco 上的软件包也非常的多，基本上软件开发中常见的安装包都有。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/choco-3a59dfe8-6c2d-4c5b-9187-bf2812a59041" alt=""></p><h3 id="小结" tabindex="-1"><a class="header-anchor" href="#小结" aria-hidden="true">#</a> 小结</h3><p>通过小二的实战笔记，我们可以了解到。</p><p>对比下载安装包，通过图形化界面的方式安装 JDK，然后下一步，下一步是不是感觉在 Shell 下安装 JDK 更炫酷一些？</p><p>关键是还省去了环境变量的配置。</p><p>记得还没有走出新手村的时候，就经常被环境变量配置烦不胜烦。那下载这种命令行的方式，要比手动在环境变量中配置要省事一百倍，也更不容易出错。</p><p>通过 Choco 可以集中安装、管理、更新各种各样的软件。特别适合管理一些轻量级的开源软件，一条命令搞定，升级的时候也方便，不用再重新去下载新的安装包，可以有效治愈更新强迫症患者的症状。</p><p>如果不想特殊设置的话，Chocolatey 整体的操作与使用还是比较亲民的。就连刚接触软件开发的小白也可以直接使用，而且路人看着会觉得你特别厉害。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/gongju/choco.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/24 下午5:00:49</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/gongju/warp.html" class="nav-link prev" aria-label="21世纪人用的终端工具Warp"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->21世纪人用的终端工具Warp</div></a><a href="/gongju/chiner.html" class="nav-link next" aria-label="数据库设计神器chiner"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">数据库设计神器chiner<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->fastjson：阿里巴巴开源的JSON解析库</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 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145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 7 分钟</span><meta property="timeRequired" content="PT7M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/fastjson.html#_01、前世今生" class="router-link-active router-link-exact-active toc-link level3">01、前世今生</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/fastjson.html#_02、使用指南" class="router-link-active router-link-exact-active toc-link level3">02、使用指南</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/fastjson.html#_03、使用注解" class="router-link-active router-link-exact-active toc-link level3">03、使用注解</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/fastjson.html#_04、序列化特性" class="router-link-active router-link-exact-active toc-link level3">04、序列化特性</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/fastjson.html#_05、我为什么快" class="router-link-active router-link-exact-active toc-link level3">05、我为什么快</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/fastjson.html#_06、尾声" class="router-link-active router-link-exact-active toc-link level3">06、尾声</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h3 id="_01、前世今生" tabindex="-1"><a class="header-anchor" href="#_01、前世今生" aria-hidden="true">#</a> 01、前世今生</h3><p>我是 fastjson，是个地地道道的杭州土著，但我始终怀揣着一颗走向全世界的雄心。这不，我在 GitHub 上的简介都换成了英文，国际范十足吧？</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/fastjson-0576767f-c447-49f1-83a3-6971782c4d52.png" alt=""></p><p>如果你的英语功底没有我家老板 666 的话，我可以简单地翻译下（说人话，不装逼）。</p><p>我是阿里巴巴开源的一款 JSON 解析库，可以将 Java 对象序列化成 JSON 字符串，同时也可以将 JSON 字符串反序列化为 Java 对象。</p><ul><li><p>我提供了服务器端和安卓客户端两种解析工具，性能表现还不错。</p></li><li><p>我提供了便捷的方式来进行 Java 对象和 JSON 之间的互转，<code>toJSONString()</code> 方法用来序列化，<code>parseObject()</code> 方法用来反序列化。</p></li><li><p>我允许转换预先存在的无法修改的对象（只有 class、没有源代码）。</p></li><li><p>对 Java 泛型有着广泛的支持。</p></li><li><p>我支持任意复杂的对象（深度的继承层次）。</p></li></ul><p>2012 年的时候，我就被开源中国评选为最受欢迎的国产开源软件之一。时隔多年，我的流行趋势没有丝毫减退，在 JSON 领域，我敢说我是 NO 1，因为我在 GitHub 上的粉丝数已经超过了 22k，没有任何人敢忽视我这样的成就。</p><h3 id="_02、使用指南" tabindex="-1"><a class="header-anchor" href="#_02、使用指南" aria-hidden="true">#</a> 02、使用指南</h3><p>在使用我的 API 之前，需要先在 pom.xml 文件中引入我的依赖。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
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class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->fastjson：阿里巴巴开源的JSON解析库</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 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01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月17日</span><meta property="datePublished" content="2022-03-17T03:18:03.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 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class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/fastjson.html#_01、前世今生" class="router-link-active router-link-exact-active toc-link level3">01、前世今生</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/fastjson.html#_02、使用指南" class="router-link-active router-link-exact-active toc-link level3">02、使用指南</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/fastjson.html#_03、使用注解" class="router-link-active router-link-exact-active toc-link level3">03、使用注解</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/fastjson.html#_04、序列化特性" class="router-link-active router-link-exact-active toc-link level3">04、序列化特性</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/fastjson.html#_05、我为什么快" class="router-link-active router-link-exact-active toc-link level3">05、我为什么快</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/fastjson.html#_06、尾声" class="router-link-active router-link-exact-active toc-link level3">06、尾声</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h3 id="_01、前世今生" tabindex="-1"><a class="header-anchor" href="#_01、前世今生" aria-hidden="true">#</a> 01、前世今生</h3><p>我是 fastjson，是个地地道道的杭州土著，但我始终怀揣着一颗走向全世界的雄心。这不，我在 GitHub 上的简介都换成了英文，国际范十足吧？</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/fastjson-0576767f-c447-49f1-83a3-6971782c4d52.png" alt=""></p><p>如果你的英语功底没有我家老板 666 的话，我可以简单地翻译下（说人话，不装逼）。</p><p>我是阿里巴巴开源的一款 JSON 解析库，可以将 Java 对象序列化成 JSON 字符串，同时也可以将 JSON 字符串反序列化为 Java 对象。</p><ul><li><p>我提供了服务器端和安卓客户端两种解析工具，性能表现还不错。</p></li><li><p>我提供了便捷的方式来进行 Java 对象和 JSON 之间的互转，<code>toJSONString()</code> 方法用来序列化，<code>parseObject()</code> 方法用来反序列化。</p></li><li><p>我允许转换预先存在的无法修改的对象（只有 class、没有源代码）。</p></li><li><p>对 Java 泛型有着广泛的支持。</p></li><li><p>我支持任意复杂的对象（深度的继承层次）。</p></li></ul><p>2012 年的时候，我就被开源中国评选为最受欢迎的国产开源软件之一。时隔多年，我的流行趋势没有丝毫减退，在 JSON 领域，我敢说我是 NO 1，因为我在 GitHub 上的粉丝数已经超过了 22k，没有任何人敢忽视我这样的成就。</p><h3 id="_02、使用指南" tabindex="-1"><a class="header-anchor" href="#_02、使用指南" aria-hidden="true">#</a> 02、使用指南</h3><p>在使用我的 API 之前，需要先在 pom.xml 文件中引入我的依赖。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
     &lt;groupId&gt;com.alibaba&lt;/groupId&gt;
     &lt;artifactId&gt;fastjson&lt;/artifactId&gt;
     &lt;version&gt;1.2.58&lt;/version&gt;
@@ -145,6 +145,6 @@ writer<span class="token punctuation">.</span><span class="token function">setBi
     <span class="token keyword">public</span> <span class="token keyword">final</span> <span class="token keyword">static</span> <span class="token keyword">int</span> DEFAULT_SIZE <span class="token operator">=</span> <span class="token number">8192</span><span class="token punctuation">;</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>再比如说，使用 asm 技术来避免反射导致的开销。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/fastjson-86a38cb0-3acc-4132-8e1f-48ebeaa52b47.png" alt=""></p><p>我承认，快的同时，也带来了一些安全性的问题。尤其是 AutoType 的引入，让黑客有了可乘之机。</p><blockquote><p>1.2.59 发布，增强 AutoType 打开时的安全性</p><p>1.2.60 发布，增加了 AutoType 黑名单，修复拒绝服务安全问题</p><p>1.2.61 发布，增加 AutoType 安全黑名单</p><p>1.2.62 发布，增加 AutoType 黑名单、增强日期反序列化和 JSONPath</p><p>1.2.66 发布，Bug 修复安全加固，并且做安全加固，补充了 AutoType 黑名单</p><p>1.2.67 发布，Bug 修复安全加固，补充了 AutoType 黑名单</p><p>1.2.68 发布，支持 GEOJSON，补充了 AutoType 黑名单。（引入一个 safeMode 的配置，配置 safeMode 后，无论白名单和黑名单，都不支持 autoType。）</p><p>1.2.69 发布，修复新发现高危 AutoType 开关绕过安全漏洞，补充了 AutoType 黑名单</p><p>1.2.70 发布，提升兼容性，补充了 AutoType 黑名单</p></blockquote><p>在于黑客的反复较量中，我虽然变得越来越稳重成熟了，但与此同时，让我的用户为此也付出了沉重的代价。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/fastjson-6868c673-8799-4326-baab-1050a5a4e9a3.png" alt=""></p><p>网络上也出现了很多不和谐的声音，他们声称我是最垃圾的国产开源软件之一，只不过凭借着一些投机取巧赢得了国内开发者的信赖。</p><p>但更多的是，对我的不离不弃。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/fastjson-85a44233-6eb2-4164-a091-6b65fc5f001a.png" alt=""></p><p>最令我感到为之动容的一句话是：</p><blockquote><p>温少几乎凭一己之力撑起了一个被广泛使用 JSON 库，而其他库几乎都是靠一整个团队，就凭这一点，温少作为“初心不改的阿里初代开源人”，当之无愧。</p></blockquote><p>出现漏洞并不可怕，可怕的是发现不了漏洞，或者说无法解决掉漏洞。</p><p>为了彻底解决 AutoType 带来的问题，在 1.2.68 版本中，我引入了 safeMode 的安全模式，无论白名单和黑名单，都不支持 AutoType，这样就可以彻底地杜绝攻击。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/fastjson-57146979-cb99-4236-94f9-1cd5276e8269.png" alt=""></p><p>安全模式下，<code>checkAutoType()</code> 方法会直接抛出异常。</p><h3 id="_06、尾声" tabindex="-1"><a class="header-anchor" href="#_06、尾声" aria-hidden="true">#</a> 06、尾声</h3><p>不管前面的路还有多少艰难困苦，也不管还要面对多少风言风语，我都会砥砺前行，为了国产开源软件的蓬勃发展，我愿意做一个先驱者，也愿意做一个持久战者。</p><p>2020 年的最后一篇文章！看到的就点个赞吧，2021 年顺顺利利。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/gongju/fastjson.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path 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right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Forest：一款极简的声明式HTTP调用API框架</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月17日</span><meta property="datePublished" content="2022-03-17T03:18:03.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category5" role>Java企业级开发</li><meta property="articleSection" content="Java企业级开发"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag1" role>辅助工具/轮子</li></ul><meta property="keywords" content="辅助工具/轮子"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 10 分钟</span><meta property="timeRequired" content="PT10M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><p>大家好，我是二哥呀！今天来给大家推荐一款直击痛点的 HTTP 客户端框架，可以超高效率地完成和第三方接口的对接。</p><p>在介绍本篇的主角之前，我们先来了解下 Java 生态中的 HTTP 组件库，大致可以分为三类：</p><ul><li>JDK 自带的 HttpURLConnection 标准库；</li><li>Apache HttpComponents HttpClient；</li><li>OkHttp。</li></ul><p>使用 HttpURLConnection 发起 HTTP 请求最大的优点是不需要引入额外的依赖，但是使用起来非常繁琐，也缺乏连接池管理、域名机械控制等特性支持。</p><p>使用标准库的最大好处就是不需要引入额外的依赖，但使用起来比较繁琐，就像直接使用 JDBC 连接数据库那样，需要很多模板代码。来发起一个简单的 HTTP POST 请求吧。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">HttpUrlConnectionDemo</span> <span class="token punctuation">{</span>
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class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/gongju/slf4j.html" class="nav-link sidebar-link sidebar-page" aria-label="日志门面SLF4J"><!---->日志门面SLF4J<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.7 分布式</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.8 消息队列</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Forest：一款极简的声明式HTTP调用API框架</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月17日</span><meta property="datePublished" content="2022-03-17T03:18:03.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category5" role>Java企业级开发</li><meta property="articleSection" content="Java企业级开发"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag1" role>辅助工具/轮子</li></ul><meta property="keywords" content="辅助工具/轮子"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 10 分钟</span><meta property="timeRequired" content="PT10M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><p>大家好，我是二哥呀！今天来给大家推荐一款直击痛点的 HTTP 客户端框架，可以超高效率地完成和第三方接口的对接。</p><p>在介绍本篇的主角之前，我们先来了解下 Java 生态中的 HTTP 组件库，大致可以分为三类：</p><ul><li>JDK 自带的 HttpURLConnection 标准库；</li><li>Apache HttpComponents HttpClient；</li><li>OkHttp。</li></ul><p>使用 HttpURLConnection 发起 HTTP 请求最大的优点是不需要引入额外的依赖，但是使用起来非常繁琐，也缺乏连接池管理、域名机械控制等特性支持。</p><p>使用标准库的最大好处就是不需要引入额外的依赖，但使用起来比较繁琐，就像直接使用 JDBC 连接数据库那样，需要很多模板代码。来发起一个简单的 HTTP POST 请求吧。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">HttpUrlConnectionDemo</span> <span class="token punctuation">{</span>
     <span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">void</span> <span class="token function">main</span><span class="token punctuation">(</span><span class="token class-name">String</span><span class="token punctuation">[</span><span class="token punctuation">]</span> args<span class="token punctuation">)</span> <span class="token keyword">throws</span> <span class="token class-name">IOException</span> <span class="token punctuation">{</span>
         <span class="token class-name">String</span> urlString <span class="token operator">=</span> <span class="token string">&quot;https://httpbin.org/post&quot;</span><span class="token punctuation">;</span>
         <span class="token class-name">String</span> bodyString <span class="token operator">=</span> <span class="token string">&quot;password=123&quot;</span><span class="token punctuation">;</span>
@@ -224,6 +224,6 @@
         <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span>ex<span class="token punctuation">.</span><span class="token function">getMessage</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
     <span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>除了上面提到的这些功能，Forset 还支持更高级的用法：</p><ul><li>HTTPS</li><li>文件上传下载</li><li>拦截器</li><li>使用代理</li><li>自定义注解</li></ul><p>大家可以去看一下 Forset 的官方文档，然后在本地实践一下，还是能学到不少知识的，尤其是 HTTPS 和文件上传下载这块，只需要简单的配置就能完成，我个人感觉还是挺值得去学习和借鉴的。</p><p>开源精神难能可贵，好的开源需要大家的添砖加瓦和支持。希望这篇文章能给大家在选择 HTTP 客户端框架时带来一个新的选择，对，就是 Forest。</p><p>这篇文章不仅介绍了 Forest 这个轻量级的 HTTP 客户端框架，还回顾了它的底层实现：HttpClient 和 OkHttp，希望能对大家有所帮助。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/gongju/forest.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/24 下午5:00:49</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><!----><a href="/gongju/junit.html" class="nav-link next" aria-label="单元测试Junit"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">单元测试Junit<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Gson：Google开源的JSON解析库</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span 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123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 10 分钟</span><meta property="timeRequired" content="PT10M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/gson.html#_01、前世今生" class="router-link-active router-link-exact-active toc-link level3">01、前世今生</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/gson.html#_02、添加依赖" class="router-link-active router-link-exact-active toc-link level3">02、添加依赖</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/gson.html#_03、性能表现" class="router-link-active router-link-exact-active toc-link level3">03、性能表现</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/gson.html#_04、使用指南" class="router-link-active router-link-exact-active toc-link level3">04、使用指南</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/gson.html#_05、处理混合类型" class="router-link-active router-link-exact-active toc-link level3">05、处理混合类型</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/gson.html#_06、个性化定制" class="router-link-active router-link-exact-active toc-link level3">06、个性化定制</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/gson.html#_07、心声" class="router-link-active router-link-exact-active toc-link level3">07、心声</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h3 id="_01、前世今生" tabindex="-1"><a class="header-anchor" href="#_01、前世今生" aria-hidden="true">#</a> 01、前世今生</h3><p>我叫 Gson，是一款开源的 Java 库，主要用途为序列化 Java 对象为 JSON 字符串，或反序列化 JSON 字符串成 Java 对象。从我的名字上，就可以看得出一些端倪，我并非籍籍无名，我出身贵族，我爸就是 Google，市值富可敌国。</p><p>当然了，作为一个聪明人，我是有自知之明的，我在我爸眼里，我并不是最闪耀的那颗星。</p><p>我来到这个世上，纯属一次意外，反正我爸是这样对我说的，他总说我是从河边捡回来的，虽然我一直不太相信。对于这件事，我向我妈确认过，她听完笑得合不拢嘴，说我太天真。</p><p>长大后，我喜欢四处闯荡，因此结识了不少同行，其中就有 <a href="https://mp.weixin.qq.com/s/e94E2FquEzjmXSlHRA8Qzw" target="_blank" rel="noopener noreferrer">Jackson<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a> 和 <a href="https://mp.weixin.qq.com/s/TsIHRTOyF2_4oNb1APfZ6Q" target="_blank" rel="noopener noreferrer">Fastjson<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>。</p><p>说起 Jackson，我总能第一时间想到 MJ，那个被上帝带走的流行天王。Jackson 在 GitHub 上有 6.1k 的 star，虽然他的粉丝数没我多，但作为 Spring Boot 的默认 JSON 解析器，我非常地尊重他。</p><p>Fastjson 来自神秘的东方，虽然爆出过一些严重的漏洞，但这并不妨碍他成为最受欢迎的 JSON 解析器，他的粉丝数比我还要多，尽管我已经有超过 18K 的 star。</p><p>外人总说我们是竞争对手，但我必须得告诉他们，我们仨的关系，好到就差穿同一条内裤了。</p><p>我们各有优势，Jackson 在运行时占用的内存较少，Fastjson 的速度更快，而我，可以处理任意的 Java 对象，甚至在没有源代码的情况下。另外，我对泛型的支持也更加的友好。</p><h3 id="_02、添加依赖" tabindex="-1"><a class="header-anchor" href="#_02、添加依赖" aria-hidden="true">#</a> 02、添加依赖</h3><p>在使用我的 API 之前，需要先把我添加到项目当中，推荐使用 Maven 和 Gradle 两种形式。</p><p>Maven：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
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class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="谷歌开源的Gson"><!---->谷歌开源的Gson<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/gongju/gson.html#_01、前世今生" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="01、前世今生"><!---->01、前世今生<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/gongju/gson.html#_02、添加依赖" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="02、添加依赖"><!---->02、添加依赖<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/gongju/gson.html#_03、性能表现" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="03、性能表现"><!---->03、性能表现<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a 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class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/gongju/jackson.html" class="nav-link sidebar-link sidebar-page" aria-label="SpringBoot内置的Jackson"><!---->SpringBoot内置的Jackson<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/gongju/log4j.html" class="nav-link sidebar-link sidebar-page" aria-label="日志框架的鼻祖Log4j"><!---->日志框架的鼻祖Log4j<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/gongju/log4j2.html" class="nav-link sidebar-link sidebar-page" aria-label="高性能日志框架Log4j2"><!---->高性能日志框架Log4j2<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/gongju/logback.html" class="nav-link sidebar-link sidebar-page" aria-label="Spring Boot内置的Logback"><!---->Spring Boot内置的Logback<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/gongju/slf4j.html" class="nav-link sidebar-link sidebar-page" aria-label="日志门面SLF4J"><!---->日志门面SLF4J<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.7 分布式</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.8 消息队列</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Gson：Google开源的JSON解析库</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 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6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 10 分钟</span><meta property="timeRequired" content="PT10M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/gson.html#_01、前世今生" class="router-link-active router-link-exact-active toc-link level3">01、前世今生</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/gson.html#_02、添加依赖" class="router-link-active router-link-exact-active toc-link level3">02、添加依赖</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/gson.html#_03、性能表现" class="router-link-active router-link-exact-active toc-link level3">03、性能表现</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/gson.html#_04、使用指南" class="router-link-active router-link-exact-active toc-link level3">04、使用指南</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/gson.html#_05、处理混合类型" class="router-link-active router-link-exact-active toc-link level3">05、处理混合类型</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/gson.html#_06、个性化定制" class="router-link-active router-link-exact-active toc-link level3">06、个性化定制</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/gson.html#_07、心声" class="router-link-active router-link-exact-active toc-link level3">07、心声</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h3 id="_01、前世今生" tabindex="-1"><a class="header-anchor" href="#_01、前世今生" aria-hidden="true">#</a> 01、前世今生</h3><p>我叫 Gson，是一款开源的 Java 库，主要用途为序列化 Java 对象为 JSON 字符串，或反序列化 JSON 字符串成 Java 对象。从我的名字上，就可以看得出一些端倪，我并非籍籍无名，我出身贵族，我爸就是 Google，市值富可敌国。</p><p>当然了，作为一个聪明人，我是有自知之明的，我在我爸眼里，我并不是最闪耀的那颗星。</p><p>我来到这个世上，纯属一次意外，反正我爸是这样对我说的，他总说我是从河边捡回来的，虽然我一直不太相信。对于这件事，我向我妈确认过，她听完笑得合不拢嘴，说我太天真。</p><p>长大后，我喜欢四处闯荡，因此结识了不少同行，其中就有 <a href="https://mp.weixin.qq.com/s/e94E2FquEzjmXSlHRA8Qzw" target="_blank" rel="noopener noreferrer">Jackson<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a> 和 <a href="https://mp.weixin.qq.com/s/TsIHRTOyF2_4oNb1APfZ6Q" target="_blank" rel="noopener noreferrer">Fastjson<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>。</p><p>说起 Jackson，我总能第一时间想到 MJ，那个被上帝带走的流行天王。Jackson 在 GitHub 上有 6.1k 的 star，虽然他的粉丝数没我多，但作为 Spring Boot 的默认 JSON 解析器，我非常地尊重他。</p><p>Fastjson 来自神秘的东方，虽然爆出过一些严重的漏洞，但这并不妨碍他成为最受欢迎的 JSON 解析器，他的粉丝数比我还要多，尽管我已经有超过 18K 的 star。</p><p>外人总说我们是竞争对手，但我必须得告诉他们，我们仨的关系，好到就差穿同一条内裤了。</p><p>我们各有优势，Jackson 在运行时占用的内存较少，Fastjson 的速度更快，而我，可以处理任意的 Java 对象，甚至在没有源代码的情况下。另外，我对泛型的支持也更加的友好。</p><h3 id="_02、添加依赖" tabindex="-1"><a class="header-anchor" href="#_02、添加依赖" aria-hidden="true">#</a> 02、添加依赖</h3><p>在使用我的 API 之前，需要先把我添加到项目当中，推荐使用 Maven 和 Gradle 两种形式。</p><p>Maven：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
     &lt;groupId&gt;com.google.code.gson&lt;/groupId&gt;
     &lt;artifactId&gt;gson&lt;/artifactId&gt;
     &lt;version&gt;2.8.6&lt;/version&gt;
@@ -202,6 +202,6 @@ list<span class="token punctuation">.</span><span class="token function">add</sp
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>再在需要序列化和反序列化的字段上加上 <code>@Expose</code> 注解，如果没加的话，该字段将会被忽略。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token annotation punctuation">@Expose</span>
 <span class="token keyword">private</span> <span class="token keyword">int</span> age <span class="token operator">=</span> <span class="token number">18</span><span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="_07、心声" tabindex="-1"><a class="header-anchor" href="#_07、心声" aria-hidden="true">#</a> 07、心声</h3><p>如果你还想了解更多的话，请来参观我的 GitHub 主页：</p><blockquote><p><a href="https://github.com/google/gson" target="_blank" rel="noopener noreferrer">https://github.com/google/gson<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>我会向你坦露我的一切，毫不保留的，除了我和女朋友之间的一些秘密，只为能够帮助到你。</p><p>如果你觉得我有点用的话，不妨点个赞，留个言，see you。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/gongju/gson.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/24 下午5:00:49</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/gongju/fastjson.html" class="nav-link prev" aria-label="阿里开源的fastjson"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->阿里开源的fastjson</div></a><a href="/gongju/jackson.html" class="nav-link next" aria-label="SpringBoot内置的Jackson"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">SpringBoot内置的Jackson<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Jackson：GitHub上star数最多的JSON解析库</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月17日</span><meta property="datePublished" content="2022-03-17T03:18:03.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category5" role>Java企业级开发</li><meta property="articleSection" content="Java企业级开发"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag1" role>辅助工具/轮子</li></ul><meta property="keywords" content="辅助工具/轮子"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 9 分钟</span><meta property="timeRequired" content="PT9M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/jackson.html#_01、引入-jackson-依赖" class="router-link-active router-link-exact-active toc-link level3">01、引入 Jackson 依赖</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/jackson.html#_02、使用-objectmapper" class="router-link-active router-link-exact-active toc-link level3">02、使用 ObjectMapper</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/jackson.html#_03、更高级的配置" class="router-link-active router-link-exact-active toc-link level3">03、更高级的配置</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/jackson.html#_04、处理日期格式" class="router-link-active router-link-exact-active toc-link level3">04、处理日期格式</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/jackson.html#_05、字段过滤" class="router-link-active router-link-exact-active toc-link level3">05、字段过滤</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/jackson.html#_06、自定义序列化和反序列化" class="router-link-active router-link-exact-active toc-link level3">06、自定义序列化和反序列化</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/jackson.html#_07、结语" class="router-link-active router-link-exact-active toc-link level3">07、结语</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><p>在当今的编程世界里，JSON 已经成为将信息从客户端传输到服务器端的首选协议，可以好不夸张的说，XML 就是那个被拍死在沙滩上的前浪。</p><p>很不幸的是，JDK 没有 JSON 库，不知道为什么不搞一下。Log4j 的时候，为了竞争，还推出了 java.util.logging，虽然最后也没多少人用。</p><p>Java 之所以牛逼，很大的功劳在于它的生态非常完备，JDK 没有 JSON 库，第三方类库有啊，还挺不错，比如说本篇的猪脚——Jackson，GitHub 上标星 6.1k，Spring Boot 的默认 JSON 解析器。</p><p>怎么证明这一点呢？</p><p>当我们通过 starter 新建一个 Spring Boot 的 Web 项目后，就可以在 Maven 的依赖项中看到 Jackson 的身影。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/jackson-4340975c-e254-4287-88e0-66f73fe88889.png" alt=""></p><p>Jackson 有很多优点：</p><ul><li>解析大文件的速度比较快；</li><li>运行时占用的内存比较少，性能更佳；</li><li>API 很灵活，容易进行扩展和定制。</li></ul><p>Jackson 的核心模块由三部分组成：</p><ul><li>jackson-core，核心包，提供基于“流模式”解析的相关 API，包括 JsonPaser 和 JsonGenerator。</li><li>jackson-annotations，注解包，提供标准的注解功能；</li><li>jackson-databind ，数据绑定包，提供基于“对象绑定”解析的相关 API （ ObjectMapper ） 和基于“树模型”解析的相关 API （JsonNode）。</li></ul><h3 id="_01、引入-jackson-依赖" tabindex="-1"><a class="header-anchor" href="#_01、引入-jackson-依赖" aria-hidden="true">#</a> 01、引入 Jackson 依赖</h3><p>要想使用 Jackson，需要在 pom.xml 文件中添加 Jackson 的依赖。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
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aria-label="06、自定义序列化和反序列化"><!---->06、自定义序列化和反序列化<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/gongju/jackson.html#_07、结语" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="07、结语"><!---->07、结语<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/gongju/log4j.html" class="nav-link sidebar-link sidebar-page" aria-label="日志框架的鼻祖Log4j"><!---->日志框架的鼻祖Log4j<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/gongju/log4j2.html" class="nav-link sidebar-link sidebar-page" aria-label="高性能日志框架Log4j2"><!---->高性能日志框架Log4j2<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/gongju/logback.html" class="nav-link sidebar-link sidebar-page" aria-label="Spring Boot内置的Logback"><!---->Spring Boot内置的Logback<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/gongju/slf4j.html" class="nav-link sidebar-link sidebar-page" aria-label="日志门面SLF4J"><!---->日志门面SLF4J<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.7 分布式</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.8 消息队列</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Jackson：GitHub上star数最多的JSON解析库</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 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18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category5" role>Java企业级开发</li><meta property="articleSection" content="Java企业级开发"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 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213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 9 分钟</span><meta property="timeRequired" content="PT9M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/jackson.html#_01、引入-jackson-依赖" class="router-link-active router-link-exact-active toc-link level3">01、引入 Jackson 依赖</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/jackson.html#_02、使用-objectmapper" class="router-link-active router-link-exact-active toc-link level3">02、使用 ObjectMapper</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/jackson.html#_03、更高级的配置" class="router-link-active router-link-exact-active toc-link level3">03、更高级的配置</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/jackson.html#_04、处理日期格式" class="router-link-active router-link-exact-active toc-link level3">04、处理日期格式</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/jackson.html#_05、字段过滤" class="router-link-active router-link-exact-active toc-link level3">05、字段过滤</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/jackson.html#_06、自定义序列化和反序列化" class="router-link-active router-link-exact-active toc-link level3">06、自定义序列化和反序列化</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/jackson.html#_07、结语" class="router-link-active router-link-exact-active toc-link level3">07、结语</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><p>在当今的编程世界里，JSON 已经成为将信息从客户端传输到服务器端的首选协议，可以好不夸张的说，XML 就是那个被拍死在沙滩上的前浪。</p><p>很不幸的是，JDK 没有 JSON 库，不知道为什么不搞一下。Log4j 的时候，为了竞争，还推出了 java.util.logging，虽然最后也没多少人用。</p><p>Java 之所以牛逼，很大的功劳在于它的生态非常完备，JDK 没有 JSON 库，第三方类库有啊，还挺不错，比如说本篇的猪脚——Jackson，GitHub 上标星 6.1k，Spring Boot 的默认 JSON 解析器。</p><p>怎么证明这一点呢？</p><p>当我们通过 starter 新建一个 Spring Boot 的 Web 项目后，就可以在 Maven 的依赖项中看到 Jackson 的身影。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/jackson-4340975c-e254-4287-88e0-66f73fe88889.png" alt=""></p><p>Jackson 有很多优点：</p><ul><li>解析大文件的速度比较快；</li><li>运行时占用的内存比较少，性能更佳；</li><li>API 很灵活，容易进行扩展和定制。</li></ul><p>Jackson 的核心模块由三部分组成：</p><ul><li>jackson-core，核心包，提供基于“流模式”解析的相关 API，包括 JsonPaser 和 JsonGenerator。</li><li>jackson-annotations，注解包，提供标准的注解功能；</li><li>jackson-databind ，数据绑定包，提供基于“对象绑定”解析的相关 API （ ObjectMapper ） 和基于“树模型”解析的相关 API （JsonNode）。</li></ul><h3 id="_01、引入-jackson-依赖" tabindex="-1"><a class="header-anchor" href="#_01、引入-jackson-依赖" aria-hidden="true">#</a> 01、引入 Jackson 依赖</h3><p>要想使用 Jackson，需要在 pom.xml 文件中添加 Jackson 的依赖。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
     &lt;groupId&gt;com.fasterxml.jackson.core&lt;/groupId&gt;
     &lt;artifactId&gt;jackson-databind&lt;/artifactId&gt;
     &lt;version&gt;2.10.1&lt;/version&gt;
@@ -368,6 +368,6 @@ mapper<span class="token punctuation">.</span><span class="token function">regis
 <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span>woman<span class="token punctuation">)</span><span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>程序输出结果如下所示：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>Woman{age=18, name=&#39;三妹&#39;}
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h3 id="_07、结语" tabindex="-1"><a class="header-anchor" href="#_07、结语" aria-hidden="true">#</a> 07、结语</h3><p>哎呀，好像不错哦，Jackson 绝对配得上“最牛掰”这三个字，虽然有点虚。如果只想简单的序列化和反序列化，使用 ObjectMapper 的 write 和 read 方法即可。</p><p>如果还想更进一步的话，就需要对 ObjectMapper 进行一些自定义配置，或者加一些注解，以及直接自定义序列化和反序列化类，更贴近一些 Java 对象。</p><p>需要注意的是，对日期格式的字段要多加小心，尽量不要使用默认配置，可读性很差。</p><p>好了，通过这篇文章的系统化介绍，相信你已经完全摸透 Jackson 了，我们下篇文章见。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/gongju/jackson.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/24 下午5:00:49</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/gongju/gson.html" class="nav-link prev" aria-label="谷歌开源的Gson"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->谷歌开源的Gson</div></a><a href="/gongju/log4j.html" class="nav-link next" aria-label="日志框架的鼻祖Log4j"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">日志框架的鼻祖Log4j<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Junit：一个开源的Java单元测试框架</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 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0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category5" role>Java企业级开发</li><meta property="articleSection" content="Java企业级开发"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag1" role>辅助工具/轮子</li></ul><meta property="keywords" content="辅助工具/轮子"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 7 分钟</span><meta property="timeRequired" content="PT7M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/junit.html#_01、前世今生" class="router-link-active router-link-exact-active toc-link level3">01、前世今生</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/junit.html#_02、上手指南" class="router-link-active router-link-exact-active toc-link level3">02、上手指南</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/junit.html#_03、瞻前顾后" class="router-link-active router-link-exact-active toc-link level3">03、瞻前顾后</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/junit.html#_03、异常测试" class="router-link-active router-link-exact-active toc-link level3">03、异常测试</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/junit.html#_04、忽略测试" class="router-link-active router-link-exact-active toc-link level3">04、忽略测试</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/junit.html#_05、条件测试" class="router-link-active router-link-exact-active toc-link level3">05、条件测试</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/junit.html#_06、尾声" class="router-link-active router-link-exact-active toc-link level3">06、尾声</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h3 id="_01、前世今生" tabindex="-1"><a class="header-anchor" href="#_01、前世今生" aria-hidden="true">#</a> 01、前世今生</h3><p>你好呀，我是 JUnit，一个开源的 Java 单元测试框架。在了解我之前，先来了解一下什么是单元测试。单元测试，就是针对最小的功能单元编写测试代码。在 Java 中，最小的功能单元就是方法，因此，对 Java 程序员进行单元测试实际上就是对 Java 方法的测试。</p><p>为什么要进行单元测试呢？因为单元测试可以确保你编写的代码是符合软件需求和遵循开发规范的。单元测试是所有测试中最底层的一类测试，是第一个环节，也是最重要的一个环节，是唯一一次能够达到代码覆盖率 100% 的测试，是整个软件测试过程的基础和前提。可以这么说，单元测试的性价比是最好的。</p><p>微软公司之前有这样一个统计：bug 在单元测试阶段被发现的平均耗时是 3.25 小时，如果遗漏到系统测试则需要 11.5 个小时。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/junit-5b0afb32-c60e-4218-98b1-44288705e472.png" alt=""></p><p>经我这么一说，你应该已经很清楚单元测试的重要性了。那在你最初编写测试代码的时候，是不是经常这么做？就像下面这样。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">Factorial</span> <span class="token punctuation">{</span>
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clickable active"><!----><span class="title">三、Java企业级开发</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.1 开发工具</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.2 IDE/编辑器</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.3 Spring</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.4 SpringBoot</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.5 辅助工具</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">3.6 开源轮子</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/gongju/forest.html" class="nav-link sidebar-link sidebar-page" aria-label="HTTP调用框架Forest"><!---->HTTP调用框架Forest<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/gongju/junit.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="单元测试Junit"><!---->单元测试Junit<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/gongju/junit.html#_01、前世今生" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="01、前世今生"><!---->01、前世今生<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/gongju/junit.html#_02、上手指南" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="02、上手指南"><!---->02、上手指南<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/gongju/junit.html#_03、瞻前顾后" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="03、瞻前顾后"><!---->03、瞻前顾后<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/gongju/junit.html#_03、异常测试" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="03、异常测试"><!---->03、异常测试<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/gongju/junit.html#_04、忽略测试" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="04、忽略测试"><!---->04、忽略测试<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/gongju/junit.html#_05、条件测试" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="05、条件测试"><!---->05、条件测试<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/gongju/junit.html#_06、尾声" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="06、尾声"><!---->06、尾声<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/gongju/fastjson.html" class="nav-link sidebar-link sidebar-page" aria-label="阿里开源的fastjson"><!---->阿里开源的fastjson<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/gongju/gson.html" class="nav-link sidebar-link sidebar-page" aria-label="谷歌开源的Gson"><!---->谷歌开源的Gson<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/gongju/jackson.html" class="nav-link sidebar-link sidebar-page" aria-label="SpringBoot内置的Jackson"><!---->SpringBoot内置的Jackson<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/gongju/log4j.html" class="nav-link sidebar-link sidebar-page" aria-label="日志框架的鼻祖Log4j"><!---->日志框架的鼻祖Log4j<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/gongju/log4j2.html" class="nav-link sidebar-link sidebar-page" aria-label="高性能日志框架Log4j2"><!---->高性能日志框架Log4j2<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/gongju/logback.html" class="nav-link sidebar-link sidebar-page" aria-label="Spring Boot内置的Logback"><!---->Spring Boot内置的Logback<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/gongju/slf4j.html" class="nav-link sidebar-link sidebar-page" aria-label="日志门面SLF4J"><!---->日志门面SLF4J<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.7 分布式</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.8 消息队列</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Junit：一个开源的Java单元测试框架</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月17日</span><meta property="datePublished" content="2022-03-17T03:18:03.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category5" role>Java企业级开发</li><meta property="articleSection" content="Java企业级开发"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag1" role>辅助工具/轮子</li></ul><meta property="keywords" content="辅助工具/轮子"></span><span 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6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 7 分钟</span><meta property="timeRequired" content="PT7M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/junit.html#_01、前世今生" class="router-link-active router-link-exact-active toc-link level3">01、前世今生</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/junit.html#_02、上手指南" class="router-link-active router-link-exact-active toc-link level3">02、上手指南</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/junit.html#_03、瞻前顾后" class="router-link-active router-link-exact-active toc-link level3">03、瞻前顾后</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/junit.html#_03、异常测试" class="router-link-active router-link-exact-active toc-link level3">03、异常测试</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/junit.html#_04、忽略测试" class="router-link-active router-link-exact-active toc-link level3">04、忽略测试</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/junit.html#_05、条件测试" class="router-link-active router-link-exact-active toc-link level3">05、条件测试</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/junit.html#_06、尾声" class="router-link-active router-link-exact-active toc-link level3">06、尾声</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h3 id="_01、前世今生" tabindex="-1"><a class="header-anchor" href="#_01、前世今生" aria-hidden="true">#</a> 01、前世今生</h3><p>你好呀，我是 JUnit，一个开源的 Java 单元测试框架。在了解我之前，先来了解一下什么是单元测试。单元测试，就是针对最小的功能单元编写测试代码。在 Java 中，最小的功能单元就是方法，因此，对 Java 程序员进行单元测试实际上就是对 Java 方法的测试。</p><p>为什么要进行单元测试呢？因为单元测试可以确保你编写的代码是符合软件需求和遵循开发规范的。单元测试是所有测试中最底层的一类测试，是第一个环节，也是最重要的一个环节，是唯一一次能够达到代码覆盖率 100% 的测试，是整个软件测试过程的基础和前提。可以这么说，单元测试的性价比是最好的。</p><p>微软公司之前有这样一个统计：bug 在单元测试阶段被发现的平均耗时是 3.25 小时，如果遗漏到系统测试则需要 11.5 个小时。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/junit-5b0afb32-c60e-4218-98b1-44288705e472.png" alt=""></p><p>经我这么一说，你应该已经很清楚单元测试的重要性了。那在你最初编写测试代码的时候，是不是经常这么做？就像下面这样。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">Factorial</span> <span class="token punctuation">{</span>
     <span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">long</span> <span class="token function">fact</span><span class="token punctuation">(</span><span class="token keyword">long</span> n<span class="token punctuation">)</span> <span class="token punctuation">{</span>
         <span class="token keyword">long</span> r <span class="token operator">=</span> <span class="token number">1</span><span class="token punctuation">;</span>
         <span class="token keyword">for</span> <span class="token punctuation">(</span><span class="token keyword">long</span> i <span class="token operator">=</span> <span class="token number">1</span><span class="token punctuation">;</span> i <span class="token operator">&lt;=</span> n<span class="token punctuation">;</span> i<span class="token operator">++</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
@@ -196,6 +196,6 @@
     <span class="token comment">// ...</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="_06、尾声" tabindex="-1"><a class="header-anchor" href="#_06、尾声" aria-hidden="true">#</a> 06、尾声</h3><p>最后，给你说三句心里话吧。在编写单元测试的时候，你最好这样做：</p><p>1）单元测试的代码本身必须非常名单明了，能一下看明白，决不能再为测试代码编写测试代码。</p><p>2）每个单元测试应该互相独立，不依赖运行时的顺序。</p><p>3）测试时要特别注意边界条件，比如说 0，<code>null</code>，空字符串&quot;&quot; 等情况。</p><p>希望我能尽早的替你发现代码中的 bug，毕竟越早的发现，造成的损失就会越小。see you！</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/gongju/junit.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/24 下午5:00:49</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/gongju/forest.html" class="nav-link prev" aria-label="HTTP调用框架Forest"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->HTTP调用框架Forest</div></a><a href="/gongju/fastjson.html" class="nav-link next" aria-label="阿里开源的fastjson"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">阿里开源的fastjson<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 6 分钟</span><meta property="timeRequired" content="PT6M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/knife4j.html#关于-knife4j" class="router-link-active router-link-exact-active toc-link level3">关于 Knife4j</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/knife4j.html#整合-knife4j" class="router-link-active router-link-exact-active toc-link level3">整合 Knife4j</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/knife4j.html#knife4j-的功能特点" class="router-link-active router-link-exact-active toc-link level3">Knife4j 的功能特点</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/knife4j.html#尾声" class="router-link-active router-link-exact-active toc-link level3">尾声</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/knife4j.html#源码路径" class="router-link-active router-link-exact-active toc-link level3">源码路径</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><p>一般在使用 Spring Boot 开发前后端分离项目的时候，都会用到 <a href="https://tobebetterjavaer.com/springboot/swagger.html" target="_blank" rel="noopener noreferrer">Swagger<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>（戳链接详细了解）。</p><p>但随着系统功能的不断增加，接口数量的爆炸式增长，Swagger 的使用体验就会变得越来越差，比如请求参数为 JSON 的时候没办法格式化，返回结果没办法折叠，还有就是没有提供搜索功能。</p><p>今天我们介绍的主角 Knife4j 弥补了这些不足，赋予了 Swagger 更强的生命力和表现力。</p><h3 id="关于-knife4j" tabindex="-1"><a class="header-anchor" href="#关于-knife4j" aria-hidden="true">#</a> 关于 Knife4j</h3><p>Knife4j 的前身是 swagger-bootstrap-ui，是 springfox-swagger-ui 的增强 UI 实现。swagger-bootstrap-ui 采用的是前端 UI 混合后端 Java 代码的打包方式，在微服务的场景下显得非常臃肿，改良后的 Knife4j 更加小巧、轻量，并且功能更加强大。</p><p>springfox-swagger-ui 的界面长这个样子，说实话，确实略显丑陋。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/knife4j-1.png" alt=""></p><p>swagger-bootstrap-ui 增强后的样子长下面这样。单纯从直观体验上来看，确实增强了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/knife4j-2.png" alt=""></p><p>那改良后的 Knife4j 不仅在界面上更加优雅、炫酷，功能上也更加强大：后端 Java 代码和前端 UI 模块分离了出来，在微服务场景下更加灵活；还提供了专注于 Swagger 的增强解决方案。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/knife4j-3.png" alt=""></p><p>官方文档：</p><blockquote><p><a href="https://doc.xiaominfo.com/knife4j/documentation/" target="_blank" rel="noopener noreferrer">https://doc.xiaominfo.com/knife4j/documentation/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>码云地址：</p><blockquote><p><a href="https://gitee.com/xiaoym/knife4j" target="_blank" rel="noopener noreferrer">https://gitee.com/xiaoym/knife4j<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>示例地址：</p><blockquote><p><a href="https://gitee.com/xiaoym/swagger-bootstrap-ui-demo" target="_blank" rel="noopener noreferrer">https://gitee.com/xiaoym/swagger-bootstrap-ui-demo<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><h3 id="整合-knife4j" tabindex="-1"><a class="header-anchor" href="#整合-knife4j" aria-hidden="true">#</a> 整合 Knife4j</h3><p>Knife4j 完全遵循了 Swagger 的使用方式，所以可以无缝切换。</p><p>第一步，在 pom.xml 文件中添加 Knife4j 的依赖（<strong>不需要再引入 springfox-boot-starter</strong>了，因为 Knife4j 的 starter 里面已经加入过了）。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
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class="title">3.8 消息队列</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Spring Boot整合Knife4j，美化强化丑陋的Swagger</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 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class="router-link-active router-link-exact-active toc-link level2">关于 Knife4j</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/knife4j.html#整合-knife4j" class="router-link-active router-link-exact-active toc-link level2">整合 Knife4j</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/knife4j.html#knife4j-的功能特点" class="router-link-active router-link-exact-active toc-link level2">Knife4j 的功能特点</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/knife4j.html#尾声" class="router-link-active router-link-exact-active toc-link level2">尾声</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/knife4j.html#源码路径" class="router-link-active router-link-exact-active toc-link level2">源码路径</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><p>一般在使用 Spring Boot 开发前后端分离项目的时候，都会用到 <a href="https://tobebetterjavaer.com/springboot/swagger.html" target="_blank" rel="noopener noreferrer">Swagger<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>（戳链接详细了解）。</p><p>但随着系统功能的不断增加，接口数量的爆炸式增长，Swagger 的使用体验就会变得越来越差，比如请求参数为 JSON 的时候没办法格式化，返回结果没办法折叠，还有就是没有提供搜索功能。</p><p>今天我们介绍的主角 Knife4j 弥补了这些不足，赋予了 Swagger 更强的生命力和表现力。</p><h2 id="关于-knife4j" tabindex="-1"><a class="header-anchor" href="#关于-knife4j" aria-hidden="true">#</a> 关于 Knife4j</h2><p>Knife4j 的前身是 swagger-bootstrap-ui，是 springfox-swagger-ui 的增强 UI 实现。swagger-bootstrap-ui 采用的是前端 UI 混合后端 Java 代码的打包方式，在微服务的场景下显得非常臃肿，改良后的 Knife4j 更加小巧、轻量，并且功能更加强大。</p><p>springfox-swagger-ui 的界面长这个样子，说实话，确实略显丑陋。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/knife4j-1.png" alt=""></p><p>swagger-bootstrap-ui 增强后的样子长下面这样。单纯从直观体验上来看，确实增强了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/knife4j-2.png" alt=""></p><p>那改良后的 Knife4j 不仅在界面上更加优雅、炫酷，功能上也更加强大：后端 Java 代码和前端 UI 模块分离了出来，在微服务场景下更加灵活；还提供了专注于 Swagger 的增强解决方案。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/knife4j-3.png" alt=""></p><p>官方文档：</p><blockquote><p><a href="https://doc.xiaominfo.com/knife4j/documentation/" target="_blank" rel="noopener noreferrer">https://doc.xiaominfo.com/knife4j/documentation/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>码云地址：</p><blockquote><p><a href="https://gitee.com/xiaoym/knife4j" target="_blank" rel="noopener noreferrer">https://gitee.com/xiaoym/knife4j<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>示例地址：</p><blockquote><p><a href="https://gitee.com/xiaoym/swagger-bootstrap-ui-demo" target="_blank" rel="noopener noreferrer">https://gitee.com/xiaoym/swagger-bootstrap-ui-demo<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><h2 id="整合-knife4j" tabindex="-1"><a class="header-anchor" href="#整合-knife4j" aria-hidden="true">#</a> 整合 Knife4j</h2><p>Knife4j 完全遵循了 Swagger 的使用方式，所以可以无缝切换。</p><p>第一步，在 pom.xml 文件中添加 Knife4j 的依赖（<strong>不需要再引入 springfox-boot-starter</strong>了，因为 Knife4j 的 starter 里面已经加入过了）。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
     &lt;groupId&gt;com.github.xiaoymin&lt;/groupId&gt;
     &lt;artifactId&gt;knife4j-spring-boot-starter&lt;/artifactId&gt;
     &lt;!--在引用时请在maven中央仓库搜索3.X最新版本号--&gt;
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class="line-number"></div><div class="line-number"></div></div></div><p>以上步骤均完成后，开始下一步，否则要么项目启动的时候报错，要么在文档中看不到测试的文档接口。</p><p>第五步，运行 Spring Boot 项目，浏览器地址栏输入以下地址访问 API 文档，查看效果。</p><blockquote><p>访问地址（和 Swagger 不同）：<a href="http://localhost:8080/doc.html" target="_blank" rel="noopener noreferrer">http://localhost:8080/doc.html<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/knife4j-0a9eb2b1-bace-4f47-ace9-8a5f9f280279.png" alt=""></p><p>是不是比 Swagger 简洁大方多了？如果想测试接口的话，可以直接点击接口，然后点击「测试」，点击发送就可以看到返回结果了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/knife4j-16b1b553-1667-4222-9f29-2e5dfc8917a0.png" alt=""></p><h3 id="knife4j-的功能特点" tabindex="-1"><a class="header-anchor" href="#knife4j-的功能特点" aria-hidden="true">#</a> Knife4j 的功能特点</h3><p>编程喵🐱实战项目中已经整合好了 Knife4j，在本地跑起来后，就可以查看所有 API 接口了。编程喵中的管理端（codingmore-admin）端口为 9002，启动服务后，在浏览器中输入 <a href="http://localhost:9002/doc.html" target="_blank" rel="noopener noreferrer">http://localhost:9002/doc.html<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a> 就可以访问到了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/knife4j-3cfbf598-b94a-4081-aab3-06af1eef612c.png" alt=""></p><p>简单来介绍下 Knife4j 的 功能特点：</p><p><strong>1）支持登录认证</strong></p><p>Knife4j 和 Swagger 一样，也是支持头部登录认证的，点击「authorize」菜单，添加登录后的信息即可保持登录认证的 token。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/knife4j-6.png" alt=""></p><p>如果某个 API 需要登录认证的话，就会把之前填写的信息带过来。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/knife4j-7.png" alt=""></p><p><strong>2）支持 JSON 折叠</strong></p><p>Swagger 是不支持 JSON 折叠的，当返回的信息非常多的时候，界面就会显得非常的臃肿。Knife4j 则不同，可以对返回的 JSON 节点进行折叠。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/knife4j-8.png" alt=""></p><p><strong>3）离线文档</strong></p><p>Knife4j 支持把 API 文档导出为离线文档（支持 markdown 格式、HTML 格式、Word 格式），</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/knife4j-9.png" alt=""></p><p>使用 Typora 打开后的样子如下，非常的大方美观。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/knife4j-10.png" alt=""></p><p><strong>4）全局参数</strong></p><p>当某些请求需要全局参数时，这个功能就很实用了，Knife4j 支持 header 和 query 两种方式。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/knife4j-11.png" alt=""></p><p>之后进行请求的时候，就会把这个全局参数带过去。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/knife4j-12.png" alt=""></p><p><strong>5）搜索 API 接口</strong></p><p>Swagger 是没有搜索功能的，当要测试的接口有很多的时候，当需要去找某一个 API 的时候就傻眼了，只能一个个去拖动滚动条去找。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/knife4j-13.png" alt=""></p><p>在文档的右上角，Knife4j 提供了文档搜索功能，输入要查询的关键字，就可以检索筛选了，是不是很方便？</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/knife4j-14.png" alt=""></p><p>目前支持搜索接口的地址、名称和描述。</p><h3 id="尾声" tabindex="-1"><a class="header-anchor" href="#尾声" aria-hidden="true">#</a> 尾声</h3><p>除了我上面提到的增强功能，Knife4j 还提供了很多实用的功能，大家可以通过官网的介绍一一尝试下，生产效率会提高不少。</p><blockquote><p><a href="https://doc.xiaominfo.com/knife4j/documentation/enhance.html" target="_blank" rel="noopener noreferrer">https://doc.xiaominfo.com/knife4j/documentation/enhance.html<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/knife4j-15.png" alt=""></p><hr><p>更多内容，只针对《Java 程序员进阶之路》星球用户开放，需要的小伙伴可以<a href="/gongju/docs/zhishixingqiu/" class="">戳链接🔗</a>加入我们的星球，一起学习，一起卷。。<strong>编程喵</strong>🐱是一个 Spring Boot+Vue 的前后端分离项目，融合了市面上绝大多数流行的技术要点。通过学习实战项目，你可以将所学的知识通过实践进行检验、你可以拓宽自己的技术边界，你可以掌握一个真正的实战项目是如何从 0 到 1 的。</p><hr><h3 id="源码路径" tabindex="-1"><a class="header-anchor" href="#源码路径" aria-hidden="true">#</a> 源码路径</h3><blockquote><ul><li>编程喵：<a href="https://github.com/itwanger/coding-more" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/coding-more<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li>codingmore-knife4j：<a href="https://github.com/itwanger/codingmore-learning/tree/main/codingmore-knife4j" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/codingmore-learning<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/gongju/knife4j.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 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class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/springboot/swagger.html" class="nav-link prev" aria-label="整合Swagger-UI"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->整合Swagger-UI</div></a><a href="/springboot/springtask.html" class="nav-link next" aria-label="整合SpringTask"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">整合SpringTask<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" 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+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>以上步骤均完成后，开始下一步，否则要么项目启动的时候报错，要么在文档中看不到测试的文档接口。</p><p>第五步，运行 Spring Boot 项目，浏览器地址栏输入以下地址访问 API 文档，查看效果。</p><blockquote><p>访问地址（和 Swagger 不同）：<a href="http://localhost:8080/doc.html" target="_blank" rel="noopener noreferrer">http://localhost:8080/doc.html<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/knife4j-0a9eb2b1-bace-4f47-ace9-8a5f9f280279.png" alt=""></p><p>是不是比 Swagger 简洁大方多了？如果想测试接口的话，可以直接点击接口，然后点击「测试」，点击发送就可以看到返回结果了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/knife4j-16b1b553-1667-4222-9f29-2e5dfc8917a0.png" alt=""></p><h2 id="knife4j-的功能特点" tabindex="-1"><a class="header-anchor" href="#knife4j-的功能特点" aria-hidden="true">#</a> Knife4j 的功能特点</h2><p>编程喵🐱实战项目中已经整合好了 Knife4j，在本地跑起来后，就可以查看所有 API 接口了。编程喵中的管理端（codingmore-admin）端口为 9002，启动服务后，在浏览器中输入 <a href="http://localhost:9002/doc.html" target="_blank" rel="noopener noreferrer">http://localhost:9002/doc.html<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a> 就可以访问到了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/knife4j-3cfbf598-b94a-4081-aab3-06af1eef612c.png" alt=""></p><p>简单来介绍下 Knife4j 的 功能特点：</p><p><strong>1）支持登录认证</strong></p><p>Knife4j 和 Swagger 一样，也是支持头部登录认证的，点击「authorize」菜单，添加登录后的信息即可保持登录认证的 token。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/knife4j-6.png" alt=""></p><p>如果某个 API 需要登录认证的话，就会把之前填写的信息带过来。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/knife4j-7.png" alt=""></p><p><strong>2）支持 JSON 折叠</strong></p><p>Swagger 是不支持 JSON 折叠的，当返回的信息非常多的时候，界面就会显得非常的臃肿。Knife4j 则不同，可以对返回的 JSON 节点进行折叠。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/knife4j-8.png" alt=""></p><p><strong>3）离线文档</strong></p><p>Knife4j 支持把 API 文档导出为离线文档（支持 markdown 格式、HTML 格式、Word 格式），</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/knife4j-9.png" alt=""></p><p>使用 Typora 打开后的样子如下，非常的大方美观。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/knife4j-10.png" alt=""></p><p><strong>4）全局参数</strong></p><p>当某些请求需要全局参数时，这个功能就很实用了，Knife4j 支持 header 和 query 两种方式。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/knife4j-11.png" alt=""></p><p>之后进行请求的时候，就会把这个全局参数带过去。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/knife4j-12.png" alt=""></p><p><strong>5）搜索 API 接口</strong></p><p>Swagger 是没有搜索功能的，当要测试的接口有很多的时候，当需要去找某一个 API 的时候就傻眼了，只能一个个去拖动滚动条去找。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/knife4j-13.png" alt=""></p><p>在文档的右上角，Knife4j 提供了文档搜索功能，输入要查询的关键字，就可以检索筛选了，是不是很方便？</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/knife4j-14.png" alt=""></p><p>目前支持搜索接口的地址、名称和描述。</p><h2 id="尾声" tabindex="-1"><a class="header-anchor" href="#尾声" aria-hidden="true">#</a> 尾声</h2><p>除了我上面提到的增强功能，Knife4j 还提供了很多实用的功能，大家可以通过官网的介绍一一尝试下，生产效率会提高不少。</p><blockquote><p><a href="https://doc.xiaominfo.com/knife4j/documentation/enhance.html" target="_blank" rel="noopener noreferrer">https://doc.xiaominfo.com/knife4j/documentation/enhance.html<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/knife4j-15.png" alt=""></p><hr><p>更多内容，只针对《Java 程序员进阶之路》星球用户开放，需要的小伙伴可以<a href="https://tobebetterjavaer.com/zhishixingqiu/" target="_blank" rel="noopener noreferrer">戳链接🔗<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>加入我们的星球，一起学习，一起卷。。<strong>编程喵</strong>🐱是一个 Spring Boot+Vue 的前后端分离项目，融合了市面上绝大多数流行的技术要点。通过学习实战项目，你可以将所学的知识通过实践进行检验、你可以拓宽自己的技术边界，你可以掌握一个真正的实战项目是如何从 0 到 1 的。</p><hr><h2 id="源码路径" tabindex="-1"><a class="header-anchor" href="#源码路径" aria-hidden="true">#</a> 源码路径</h2><blockquote><ul><li>编程喵：<a href="https://github.com/itwanger/coding-more" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/coding-more<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li>codingmore-knife4j：<a href="https://github.com/itwanger/codingmore-learning/tree/main/codingmore-knife4j" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/codingmore-learning<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a 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class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/6/10 下午7:28:25</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><a 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--- a/dist/gongju/log4j.html
+++ b/dist/gongju/log4j.html
@@ -39,10 +39,10 @@
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     <link rel="stylesheet" href="/assets/style.aa7884a9.css">
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aria-label="单元测试Junit"><!---->单元测试Junit<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/gongju/fastjson.html" class="nav-link sidebar-link sidebar-page" aria-label="阿里开源的fastjson"><!---->阿里开源的fastjson<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/gongju/gson.html" class="nav-link sidebar-link sidebar-page" aria-label="谷歌开源的Gson"><!---->谷歌开源的Gson<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/gongju/jackson.html" class="nav-link sidebar-link sidebar-page" aria-label="SpringBoot内置的Jackson"><!---->SpringBoot内置的Jackson<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/gongju/log4j.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="日志框架的鼻祖Log4j"><!---->日志框架的鼻祖Log4j<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" 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nav-link sidebar-link heading" aria-label="04、为什么选择 Log4j 而不是 java.util.logging"><!---->04、为什么选择 Log4j 而不是 java.util.logging<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/gongju/log4j.html#_05、打印日志的-8-个小技巧" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="05、打印日志的 8 个小技巧"><!---->05、打印日志的 8 个小技巧<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/gongju/log4j.html#_06、-总结" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="06、 总结"><!---->06、 总结<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/gongju/log4j2.html" class="nav-link sidebar-link sidebar-page" aria-label="高性能日志框架Log4j2"><!---->高性能日志框架Log4j2<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/gongju/logback.html" class="nav-link sidebar-link sidebar-page" aria-label="Spring Boot内置的Logback"><!---->Spring Boot内置的Logback<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/gongju/slf4j.html" class="nav-link sidebar-link sidebar-page" aria-label="日志门面SLF4J"><!---->日志门面SLF4J<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.7 分布式</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.8 消息队列</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Log4j：Java日志框架的鼻祖</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 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class="theme-hope-content"><p>空了的时候，我都会在群里偷偷摸摸地潜水，对小伙伴们的一举一动、一言一行筛查诊断。一副班主任的即时感，让我感到非常的快乐，<strong>略微夹带一丝丝的枯燥</strong>。</p><p>这不，我在战国时代读者群里发现了这么一串聊天记录：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/log4j-cacd9e88-4a4d-4127-a18b-f99b2e2296a3.png" alt=""></p><p>竟然有小伙伴不知道“打日志”是什么意思，不知道该怎么学习，还有小伙伴回答说，只知道 Log4j！</p><p>有那么一刻，我遭受到了一万点暴击，内心莫名的伤感，犹如一匹垂头丧气的狗。因为网络上总有一些不怀好意的人不停地攻击我，说我写的文章入门，毫无深度——他们就是我命中注定的黑子，不信你到脉脉上搜“沉默王二”，就能看到他们毫无新意的抨击。</p><p>我就想问一下，怎么了，入门的文章有入门的群体需要，而我恰好帮助了这么一大批初学者，我应该受到褒奖好不好？</p><p>（说好的不在乎，怎么在乎起来了呢？手动狗头）</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/log4j-58282c4d-8178-45bd-8ba3-26740f6dd4a3.png" alt=""></p><p>管他呢，<strong>我行我素</strong>吧，保持初心不改就对了！这篇文章就来说说 Log4j，这个打印日志的鼻祖。Java 中的日志打印其实是个艺术活，我保证，这句话绝不是忽悠。</p><p>事实证明，打印日志绝逼会影响到程序的性能，这是不可否认的，毕竟多做了一项工作。尤其是在交易非常频繁的程序里，涌现大量的日志确实会比较低效。</p><p>基于性能上的考量，小伙伴们很有必要认认真真地学习一下如何优雅地打印 Java 日志。毕竟，<a href="https://mp.weixin.qq.com/s/vEt_ypvByKS-oCsuRmpgUw" target="_blank" rel="noopener noreferrer">性能<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>是一个程序员优不优秀的重要考量。</p><h3 id="_01、为什么需要在-java-中打印日志" tabindex="-1"><a class="header-anchor" href="#_01、为什么需要在-java-中打印日志" aria-hidden="true">#</a> 01、为什么需要在 Java 中打印日志</h3><p><code>System.out.println()</code> 恐怕是我们在学习 Java 的时候，最常用的一种打印日志的方式了，几乎每个 Java 初学者都这样干过，甚至一些老鸟。</p><p>之所以这样打印日志，是因为很方便，上手难度很低，尤其是在 IDEA 的帮助下，只需在键盘上按下 <code>so</code> 两个字母就可以调出 <code>System.out.println()</code>。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/log4j-64dbb12b-8f6b-4ee3-ab5a-60519dd9112f.png" alt=""></p><p>在本地环境下，使用 <code>System.out.println()</code> 打印日志是没问题的，可以在控制台看到信息。但如果是在生产环境下的话，<code>System.out.println()</code> 就变得毫无用处了。</p><p>控制台打印出的信息并没有保存到日志文件中，只能即时查看，在一屏日志的情况下还可以接受。如果日志量非常大，控制台根本就装不下。所以就需要更高级的日志记录 API（比如 Log4j 和 java.util.logging）。</p><p>它们可以把大量的日志信息保存到文件中，并且控制每个文件的大小，如果满了，就存储到下一个，方便查找。</p><h3 id="_02、选择不同日志级别的重要性" tabindex="-1"><a class="header-anchor" href="#_02、选择不同日志级别的重要性" aria-hidden="true">#</a> 02、选择不同日志级别的重要性</h3><p>使用 Java 日志的时候，一定要注意日志的级别，比如常见的 DEBUG、INFO、WARN 和 ERROR。</p><p>DEBUG 的级别最低，当需要打印调试信息的话，就用这个级别，不建议在生产环境下使用。</p><p>INFO 的级别高一些，当一些重要的信息需要打印的时候，就用这个。</p><p>WARN，用来记录一些警告类的信息，比如说客户端和服务端的连接断开了，数据库连接丢失了。</p><p>ERROR 比 WARN 的级别更高，用来记录错误或者异常的信息。</p><p>FATAL，当程序出现致命错误的时候使用，这意味着程序可能非正常中止了。</p><p>OFF，最高级别，意味着所有消息都不会输出了。</p><p>这个级别是基于 Log4j 的，和 java.util.logging 有所不同，后者提供了更多的日志级别，比如说 SEVERE、FINER、FINEST。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/log4j-4919cd20-e524-43a2-8b41-9eab6ac0c1e4.png" alt=""></p><h3 id="_03、错误的日志记录方式是如何影响性能的" tabindex="-1"><a class="header-anchor" href="#_03、错误的日志记录方式是如何影响性能的" aria-hidden="true">#</a> 03、错误的日志记录方式是如何影响性能的</h3><p>为什么说错误的日志记录方式会影响程序的性能呢？因为日志记录的次数越多，意味着执行文件 IO 操作的次数就越多，这也就意味着会影响到程序的性能，能 get 吧？</p><p>虽然说普通硬盘升级到固态硬盘后，读写速度快了很多，但磁盘相对于内存和 CPU 来说，还是太慢了！就像马车和奔驰之间的速度差距。</p><p>这也就是为什么要选择日志级别的重要性。对于程序来说，记录日志是必选项，所以能控制的就是日志的级别，以及在这个级别上打印的日志。</p><p>对于 DEBUG 级别的日志来说，一定要使用下面的方式来记录：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">if</span><span class="token punctuation">(</span>logger<span class="token punctuation">.</span><span class="token function">isDebugEnabled</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">{</span> 
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sidebar-page" aria-label="谷歌开源的Gson"><!---->谷歌开源的Gson<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/gongju/jackson.html" class="nav-link sidebar-link sidebar-page" aria-label="SpringBoot内置的Jackson"><!---->SpringBoot内置的Jackson<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/gongju/log4j.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="日志框架的鼻祖Log4j"><!---->日志框架的鼻祖Log4j<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/gongju/log4j.html#_01、为什么需要在-java-中打印日志" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="01、为什么需要在 Java 中打印日志"><!---->01、为什么需要在 Java 中打印日志<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/gongju/log4j.html#_02、选择不同日志级别的重要性" class="router-link-active 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aria-label="05、打印日志的 8 个小技巧"><!---->05、打印日志的 8 个小技巧<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/gongju/log4j.html#_06、-总结" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="06、 总结"><!---->06、 总结<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/gongju/log4j2.html" class="nav-link sidebar-link sidebar-page" aria-label="高性能日志框架Log4j2"><!---->高性能日志框架Log4j2<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/gongju/logback.html" class="nav-link sidebar-link sidebar-page" aria-label="Spring Boot内置的Logback"><!---->Spring Boot内置的Logback<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/gongju/slf4j.html" class="nav-link sidebar-link sidebar-page" aria-label="日志门面SLF4J"><!---->日志门面SLF4J<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.7 分布式</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.8 消息队列</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Log4j：Java日志框架的鼻祖</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 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6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 11 分钟</span><meta property="timeRequired" content="PT11M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/log4j.html#_01、为什么需要在-java-中打印日志" class="router-link-active router-link-exact-active toc-link level3">01、为什么需要在 Java 中打印日志</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/log4j.html#_02、选择不同日志级别的重要性" class="router-link-active router-link-exact-active toc-link level3">02、选择不同日志级别的重要性</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/log4j.html#_03、错误的日志记录方式是如何影响性能的" class="router-link-active router-link-exact-active toc-link level3">03、错误的日志记录方式是如何影响性能的</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/log4j.html#_04、为什么选择-log4j-而不是-java-util-logging" class="router-link-active router-link-exact-active toc-link level3">04、为什么选择 Log4j 而不是 java.util.logging</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/log4j.html#_05、打印日志的-8-个小技巧" class="router-link-active router-link-exact-active toc-link level3">05、打印日志的 8 个小技巧</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/log4j.html#_06、-总结" class="router-link-active router-link-exact-active toc-link level3">06、 总结</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><p>空了的时候，我都会在群里偷偷摸摸地潜水，对小伙伴们的一举一动、一言一行筛查诊断。一副班主任的即时感，让我感到非常的快乐，<strong>略微夹带一丝丝的枯燥</strong>。</p><p>这不，我在战国时代读者群里发现了这么一串聊天记录：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/log4j-cacd9e88-4a4d-4127-a18b-f99b2e2296a3.png" alt=""></p><p>竟然有小伙伴不知道“打日志”是什么意思，不知道该怎么学习，还有小伙伴回答说，只知道 Log4j！</p><p>有那么一刻，我遭受到了一万点暴击，内心莫名的伤感，犹如一匹垂头丧气的狗。因为网络上总有一些不怀好意的人不停地攻击我，说我写的文章入门，毫无深度——他们就是我命中注定的黑子，不信你到脉脉上搜“沉默王二”，就能看到他们毫无新意的抨击。</p><p>我就想问一下，怎么了，入门的文章有入门的群体需要，而我恰好帮助了这么一大批初学者，我应该受到褒奖好不好？</p><p>（说好的不在乎，怎么在乎起来了呢？手动狗头）</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/log4j-58282c4d-8178-45bd-8ba3-26740f6dd4a3.png" alt=""></p><p>管他呢，<strong>我行我素</strong>吧，保持初心不改就对了！这篇文章就来说说 Log4j，这个打印日志的鼻祖。Java 中的日志打印其实是个艺术活，我保证，这句话绝不是忽悠。</p><p>事实证明，打印日志绝逼会影响到程序的性能，这是不可否认的，毕竟多做了一项工作。尤其是在交易非常频繁的程序里，涌现大量的日志确实会比较低效。</p><p>基于性能上的考量，小伙伴们很有必要认认真真地学习一下如何优雅地打印 Java 日志。毕竟，<a href="https://mp.weixin.qq.com/s/vEt_ypvByKS-oCsuRmpgUw" target="_blank" rel="noopener noreferrer">性能<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>是一个程序员优不优秀的重要考量。</p><h3 id="_01、为什么需要在-java-中打印日志" tabindex="-1"><a class="header-anchor" href="#_01、为什么需要在-java-中打印日志" aria-hidden="true">#</a> 01、为什么需要在 Java 中打印日志</h3><p><code>System.out.println()</code> 恐怕是我们在学习 Java 的时候，最常用的一种打印日志的方式了，几乎每个 Java 初学者都这样干过，甚至一些老鸟。</p><p>之所以这样打印日志，是因为很方便，上手难度很低，尤其是在 IDEA 的帮助下，只需在键盘上按下 <code>so</code> 两个字母就可以调出 <code>System.out.println()</code>。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/log4j-64dbb12b-8f6b-4ee3-ab5a-60519dd9112f.png" alt=""></p><p>在本地环境下，使用 <code>System.out.println()</code> 打印日志是没问题的，可以在控制台看到信息。但如果是在生产环境下的话，<code>System.out.println()</code> 就变得毫无用处了。</p><p>控制台打印出的信息并没有保存到日志文件中，只能即时查看，在一屏日志的情况下还可以接受。如果日志量非常大，控制台根本就装不下。所以就需要更高级的日志记录 API（比如 Log4j 和 java.util.logging）。</p><p>它们可以把大量的日志信息保存到文件中，并且控制每个文件的大小，如果满了，就存储到下一个，方便查找。</p><h3 id="_02、选择不同日志级别的重要性" tabindex="-1"><a class="header-anchor" href="#_02、选择不同日志级别的重要性" aria-hidden="true">#</a> 02、选择不同日志级别的重要性</h3><p>使用 Java 日志的时候，一定要注意日志的级别，比如常见的 DEBUG、INFO、WARN 和 ERROR。</p><p>DEBUG 的级别最低，当需要打印调试信息的话，就用这个级别，不建议在生产环境下使用。</p><p>INFO 的级别高一些，当一些重要的信息需要打印的时候，就用这个。</p><p>WARN，用来记录一些警告类的信息，比如说客户端和服务端的连接断开了，数据库连接丢失了。</p><p>ERROR 比 WARN 的级别更高，用来记录错误或者异常的信息。</p><p>FATAL，当程序出现致命错误的时候使用，这意味着程序可能非正常中止了。</p><p>OFF，最高级别，意味着所有消息都不会输出了。</p><p>这个级别是基于 Log4j 的，和 java.util.logging 有所不同，后者提供了更多的日志级别，比如说 SEVERE、FINER、FINEST。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/log4j-4919cd20-e524-43a2-8b41-9eab6ac0c1e4.png" alt=""></p><h3 id="_03、错误的日志记录方式是如何影响性能的" tabindex="-1"><a class="header-anchor" href="#_03、错误的日志记录方式是如何影响性能的" aria-hidden="true">#</a> 03、错误的日志记录方式是如何影响性能的</h3><p>为什么说错误的日志记录方式会影响程序的性能呢？因为日志记录的次数越多，意味着执行文件 IO 操作的次数就越多，这也就意味着会影响到程序的性能，能 get 吧？</p><p>虽然说普通硬盘升级到固态硬盘后，读写速度快了很多，但磁盘相对于内存和 CPU 来说，还是太慢了！就像马车和奔驰之间的速度差距。</p><p>这也就是为什么要选择日志级别的重要性。对于程序来说，记录日志是必选项，所以能控制的就是日志的级别，以及在这个级别上打印的日志。</p><p>对于 DEBUG 级别的日志来说，一定要使用下面的方式来记录：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">if</span><span class="token punctuation">(</span>logger<span class="token punctuation">.</span><span class="token function">isDebugEnabled</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">{</span> 
     logger<span class="token punctuation">.</span><span class="token function">debug</span><span class="token punctuation">(</span><span class="token string">&quot;DEBUG 是开启的&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span> 
 <span class="token punctuation">}</span> 
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>当 DEBUG 级别是开启的时候再打印日志，这种方式在你看很多源码的时候就可以发现，很常见。</p><p>切记，在生产环境下，一定不要开启 DEBUG 级别的日志，否则程序在大量记录日志的时候会变很慢，还有可能在你不注意的情况下，悄悄地把磁盘空间撑爆。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/log4j-fd2149c5-2d0c-4c15-897d-d5fa06cce71f.png" alt=""></p><h3 id="_04、为什么选择-log4j-而不是-java-util-logging" tabindex="-1"><a class="header-anchor" href="#_04、为什么选择-log4j-而不是-java-util-logging" aria-hidden="true">#</a> 04、为什么选择 Log4j 而不是 java.util.logging</h3><p>java.util.logging 属于原生的日志 API，Log4j 属于第三方类库，但我建议使用 Log4j，因为 Log4j 更好用。java.util.logging 的日志级别比 Log4j 更多，但用不着，就变成了多余。</p><p>Log4j 的另外一个好处就是，不需要重新启动 Java 程序就可以调整日志的记录级别，非常灵活。可以通过 log4j.properties 文件来配置 Log4j 的日志级别、输出环境、日志文件的记录方式。</p><p>Log4j 还是线程安全的，可以在多线程的环境下放心使用。</p><p>先来看一下 java.util.logging 的使用方式：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">package</span> <span class="token namespace">com<span class="token punctuation">.</span>itwanger</span><span class="token punctuation">;</span>
@@ -152,6 +152,6 @@ log4j.appender.appenderName.layout.option = valueN
     logger<span class="token punctuation">.</span><span class="token function">debug</span><span class="token punctuation">(</span><span class="token string">&quot;用户名是：&quot;</span> <span class="token operator">+</span> <span class="token function">getName</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>换成上面这种方式，那确定此时 <code>getName()</code> 是不执行的，对吧？</p><p>为了程序性能上的考量，<code>isDebugEnabled()</code> 就变得很有必要了！假如说 <code>debug()</code> 的时候没有传参，确实是不需要判断 DEBUG 是否启用的。</p><p>2）慎重选择日志信息的打印级别，因为这太重要了！如果只能通过日志查看程序发生了什么问题，那必要的信息是必须要打印的，但打印得太多，又会影响到程序的性能。</p><p>所以，该 INFO 的 <code>info()</code>，该 DEBUG 的 <code>debug()</code>，不要随便用。</p><p>3）使用 Log4j 而不是 <code>System.out</code>、<code>System.err</code> 或者 <code>e.printStackTrace()</code> 来打印日志，原因之前讲过了，就不再赘述了。</p><p>4）使用 log4j.properties 文件来配置日志，尽管它不是必须项，使用该文件会让程序变得更灵活，有一种我的地盘我做主的味道。</p><p>5）不要忘记在打印日志的时候带上类的全名和线程名，在多线程环境下，这点尤为重要，否则定位问题的时候就太难了。</p><p>6）打印日志信息的时候尽量要完整，不要太过于缺省，尤其是在遇到异常或者错误的时候（信息要保留两类：案发现场信息和异常堆栈信息，如果不做处理，通过 throws 关键字往上抛），免得在找问题的时候都是一些无用的日志信息。</p><p>7）要对日志信息加以区分，把某一类的日志信息在输出的时候加上前缀，比如说所有数据库级别的日志里添加 <code>DB_LOG</code>，这样的日志非常大的时候可以通过 <code>grep</code> 这样的 Linux 命令快速定位。</p><p>8）不要在日志文件中打印密码、银行账号等敏感信息。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/log4j-42d3a052-daeb-450a-a775-a32f983dd688.png" alt=""></p><h3 id="_06、-总结" tabindex="-1"><a class="header-anchor" href="#_06、-总结" aria-hidden="true">#</a> 06、 总结</h3><p>打印日志真的是一种艺术活，搞不好会严重影响服务器的性能。最可怕的是，记录了日志，但最后发现屁用没有，那简直是苍了个天啊！尤其是在生产环境下，问题没有记录下来，但重现有一定的随机性，到那时候，真的是叫天天不应，叫地地不灵啊！</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/gongju/log4j.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/24 下午5:00:49</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/gongju/jackson.html" class="nav-link prev" aria-label="SpringBoot内置的Jackson"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->SpringBoot内置的Jackson</div></a><a href="/gongju/log4j2.html" class="nav-link next" aria-label="高性能日志框架Log4j2"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">高性能日志框架Log4j2<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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clickable"><!----><span class="title">3.8 消息队列</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Log4j 2：Apache维护的一款高性能日志记录工具</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 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href="/gongju/log4j2.html#_01、log4j-2-强在哪" class="router-link-active router-link-exact-active toc-link level3">01、Log4j 2 强在哪</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/log4j2.html#_02、log4j-2-使用示例" class="router-link-active router-link-exact-active toc-link level3">02、Log4j 2 使用示例</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/log4j2.html#_03、async-示例" class="router-link-active router-link-exact-active toc-link level3">03、Async 示例</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/log4j2.html#_04、rollingfile-示例" class="router-link-active router-link-exact-active toc-link level3">04、RollingFile 示例</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><p>Log4j 2，顾名思义，它就是 Log4j 的升级版，就好像手机里面的 Pro 版。我作为一个写文章方面的工具人，或者叫打工人，怎么能不写完这最后一篇。</p><p>Log4j、SLF4J、Logback 是一个爹——Ceki Gulcu，但 Log4j 2 却是例外，它是 Apache 基金会的产品。</p><p>SLF4J 和 Logback 作为 Log4j 的替代品，在很多方面都做了必要的改进，那为什么还需要 Log4j 2 呢？我只能说 Apache 基金会的开发人员很闲，不，很拼，要不是他们这种精益求精的精神，这个编程的世界该有多枯燥，毕竟少了很多可以用“拿来就用”的轮子啊。</p><p>上一篇也说了，老板下死命令要我把日志系统切换到 Logback，我顺利交差了，老板很开心，夸我这个打工人很敬业。为了表达对老板的这份感谢，我决定偷偷摸摸地试水一下 Log4j 2，尽管它还不是个成品，可能会会项目带来一定的隐患。但谁让咱是一个敬岗爱业的打工人呢。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/log4j2-a9461265-7652-4512-9219-6b3e82392415.png" alt=""></p><h3 id="_01、log4j-2-强在哪" tabindex="-1"><a class="header-anchor" href="#_01、log4j-2-强在哪" aria-hidden="true">#</a> 01、Log4j 2 强在哪</h3><p>1）在多线程场景下，Log4j 2 的吞吐量比 Logback 高出了 10 倍，延迟降低了几个数量级。这话听起来像吹牛，反正是 Log4j 2 官方自己吹的。</p><p>Log4j 2 的异步 Logger 使用的是无锁数据结构，而 Logback 和 Log4j 的异步 Logger 使用的是 ArrayBlockingQueue。对于阻塞队列，多线程应用程序在尝试使日志事件入队时通常会遇到锁争用。</p><p>下图说明了多线程方案中无锁数据结构对吞吐量的影响。 Log4j 2 随着线程数量的扩展而更好地扩展：具有更多线程的应用程序可以记录更多的日志。其他日志记录库由于存在锁竞争的关系，在记录更多线程时，总吞吐量保持恒定或下降。这意味着使用其他日志记录库，每个单独的线程将能够减少日志记录。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/log4j2-43f0b03d-5c4a-4af3-9e4c-177956246740.png" alt=""></p><p>性能方面是 Log4j 2 的最大亮点，至于其他方面的一些优势，比如说下面这些，可以忽略不计，文字有多短就代表它有多不重要。</p><p>2）Log4j 2 可以减少垃圾收集器的压力。</p><p>3）支持 Lambda 表达式。</p><p>4）支持自动重载配置。</p><h3 id="_02、log4j-2-使用示例" tabindex="-1"><a class="header-anchor" href="#_02、log4j-2-使用示例" aria-hidden="true">#</a> 02、Log4j 2 使用示例</h3><p>废话不多说，直接实操开干。理论知识有用，但不如上手实操一把，这也是我多年养成的一个“不那么良好”的编程习惯：在实操中发现问题，解决问题，寻找理论基础。</p><p><strong>第一步</strong>，在 pom.xml 文件中添加 Log4j 2 的依赖：</p><div class="language-xml ext-xml line-numbers-mode"><pre class="language-xml"><code><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>dependency</span><span class="token punctuation">&gt;</span></span>
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right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Log4j 2：Apache维护的一款高性能日志记录工具</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 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0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category5" role>Java企业级开发</li><meta property="articleSection" content="Java企业级开发"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag1" role>辅助工具/轮子</li></ul><meta property="keywords" content="辅助工具/轮子"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 9 分钟</span><meta property="timeRequired" content="PT9M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/log4j2.html#_01、log4j-2-强在哪" class="router-link-active router-link-exact-active toc-link level3">01、Log4j 2 强在哪</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/log4j2.html#_02、log4j-2-使用示例" class="router-link-active router-link-exact-active toc-link level3">02、Log4j 2 使用示例</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/log4j2.html#_03、async-示例" class="router-link-active router-link-exact-active toc-link level3">03、Async 示例</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/log4j2.html#_04、rollingfile-示例" class="router-link-active router-link-exact-active toc-link level3">04、RollingFile 示例</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><p>Log4j 2，顾名思义，它就是 Log4j 的升级版，就好像手机里面的 Pro 版。我作为一个写文章方面的工具人，或者叫打工人，怎么能不写完这最后一篇。</p><p>Log4j、SLF4J、Logback 是一个爹——Ceki Gulcu，但 Log4j 2 却是例外，它是 Apache 基金会的产品。</p><p>SLF4J 和 Logback 作为 Log4j 的替代品，在很多方面都做了必要的改进，那为什么还需要 Log4j 2 呢？我只能说 Apache 基金会的开发人员很闲，不，很拼，要不是他们这种精益求精的精神，这个编程的世界该有多枯燥，毕竟少了很多可以用“拿来就用”的轮子啊。</p><p>上一篇也说了，老板下死命令要我把日志系统切换到 Logback，我顺利交差了，老板很开心，夸我这个打工人很敬业。为了表达对老板的这份感谢，我决定偷偷摸摸地试水一下 Log4j 2，尽管它还不是个成品，可能会会项目带来一定的隐患。但谁让咱是一个敬岗爱业的打工人呢。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/log4j2-a9461265-7652-4512-9219-6b3e82392415.png" alt=""></p><h3 id="_01、log4j-2-强在哪" tabindex="-1"><a class="header-anchor" href="#_01、log4j-2-强在哪" aria-hidden="true">#</a> 01、Log4j 2 强在哪</h3><p>1）在多线程场景下，Log4j 2 的吞吐量比 Logback 高出了 10 倍，延迟降低了几个数量级。这话听起来像吹牛，反正是 Log4j 2 官方自己吹的。</p><p>Log4j 2 的异步 Logger 使用的是无锁数据结构，而 Logback 和 Log4j 的异步 Logger 使用的是 ArrayBlockingQueue。对于阻塞队列，多线程应用程序在尝试使日志事件入队时通常会遇到锁争用。</p><p>下图说明了多线程方案中无锁数据结构对吞吐量的影响。 Log4j 2 随着线程数量的扩展而更好地扩展：具有更多线程的应用程序可以记录更多的日志。其他日志记录库由于存在锁竞争的关系，在记录更多线程时，总吞吐量保持恒定或下降。这意味着使用其他日志记录库，每个单独的线程将能够减少日志记录。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/log4j2-43f0b03d-5c4a-4af3-9e4c-177956246740.png" alt=""></p><p>性能方面是 Log4j 2 的最大亮点，至于其他方面的一些优势，比如说下面这些，可以忽略不计，文字有多短就代表它有多不重要。</p><p>2）Log4j 2 可以减少垃圾收集器的压力。</p><p>3）支持 Lambda 表达式。</p><p>4）支持自动重载配置。</p><h3 id="_02、log4j-2-使用示例" tabindex="-1"><a class="header-anchor" href="#_02、log4j-2-使用示例" aria-hidden="true">#</a> 02、Log4j 2 使用示例</h3><p>废话不多说，直接实操开干。理论知识有用，但不如上手实操一把，这也是我多年养成的一个“不那么良好”的编程习惯：在实操中发现问题，解决问题，寻找理论基础。</p><p><strong>第一步</strong>，在 pom.xml 文件中添加 Log4j 2 的依赖：</p><div class="language-xml ext-xml line-numbers-mode"><pre class="language-xml"><code><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>dependency</span><span class="token punctuation">&gt;</span></span>
     <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>groupId</span><span class="token punctuation">&gt;</span></span>org.apache.logging.log4j<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>groupId</span><span class="token punctuation">&gt;</span></span>
     <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>artifactId</span><span class="token punctuation">&gt;</span></span>log4j-api<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>artifactId</span><span class="token punctuation">&gt;</span></span>
     <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>version</span><span class="token punctuation">&gt;</span></span>2.5<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>version</span><span class="token punctuation">&gt;</span></span>
@@ -149,6 +149,6 @@
     &lt;/Policies&gt;
 &lt;/RollingFile&gt;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><ul><li><p>fileName 的属性值中包含了一个目录 gz，也就是说日志文件都将放在这个目录下。</p></li><li><p>filePattern 的属性值中增加了一个 gz 的后缀，这就表明日志文件要进行压缩了，还可以是 zip 格式。</p></li></ul><p>运行 Demo 后，可以在 gz 目录下看到以下文件：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/log4j2-1b04167d-a11f-4447-9062-cb3cdd59aa73.png" alt=""></p><p>到此为止，Log4j 2 的基本使用示例就已经完成了。测试环境搞定，我去问一下老板，要不要在生产环境下使用 Log4j 2。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/gongju/log4j2.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/24 下午5:00:49</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/gongju/log4j.html" class="nav-link prev" aria-label="日志框架的鼻祖Log4j"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->日志框架的鼻祖Log4j</div></a><a href="/gongju/logback.html" class="nav-link next" aria-label="Spring Boot内置的Logback"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">Spring Boot内置的Logback<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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diff --git a/dist/gongju/logback.html b/dist/gongju/logback.html
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class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Logback：Spring Boot内置的日志处理框架</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 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class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/logback.html#_01、logback-强在哪" class="router-link-active router-link-exact-active toc-link level3">01、Logback 强在哪</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/logback.html#_02、logback-使用示例" class="router-link-active router-link-exact-active toc-link level3">02、Logback 使用示例</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/logback.html#_03、把-log4j-properties-转成-logback-test-xml" class="router-link-active router-link-exact-active toc-link level3">03、把 log4j.properties 转成 logback-test.xml</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/logback.html#_04、logback-手册" class="router-link-active router-link-exact-active toc-link level3">04、Logback 手册</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><p>就在昨天，老板听我说完 Logback 有多牛逼之后，彻底动心了，对我下了死命令，“这么好的日志系统，你还不赶紧点，把它切换到咱的项目当中！”</p><p>我们项目之前用的 Log4j，在我看来，已经足够用了，毕竟是小公司，性能上的要求没那么苛刻。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/logback-320329e9-a754-427f-8a19-2e4f809b6a6f.png" alt=""></p><p><a href="https://mp.weixin.qq.com/s/AXgNnJe8djD901EmhFkWUg" target="_blank" rel="noopener noreferrer">Log4j<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a> 介绍过了，<a href="https://mp.weixin.qq.com/s/EhKf1rHWL-QII0f6eo0uVA" target="_blank" rel="noopener noreferrer">SLF4J<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a> 也介绍过了，那接下来，你懂的，Logback 就要隆重地登场了，毕竟它哥仨有一个爹，那就是巨佬 Ceki Gulcu。</p><h3 id="_01、logback-强在哪" tabindex="-1"><a class="header-anchor" href="#_01、logback-强在哪" aria-hidden="true">#</a> 01、Logback 强在哪</h3><p>1）非常自然地实现了 SLF4J，不需要像 Log4j 和 JUL 那样加一个适配层。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/logback-6ba1b465-5533-49dd-b875-48a10ba29f8e.png" alt=""></p><p>2）Spring Boot 的默认日志框架使用的是 Logback。一旦某款工具库成为了默认选项，那就说明这款工具已经超过了其他竞品。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/logback-2696cd8b-7e8c-4476-9a06-272fd22fa4b6.png" alt=""></p><p>注意看下图（证据找到了，来自 <a href="https://docs.spring.io/spring-boot/docs/current/reference/html/spring-boot-features.html#boot-features-logging" target="_blank" rel="noopener noreferrer">Spring Boot 官网<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>）：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/logback-82d78a15-8ae0-4377-a7af-aebd5cda4fda.png" alt=""></p><p>也可以通过源码的形式看得到：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/logback-2df2d06e-1b01-428b-8444-d765056e25bb.png" alt=""></p><p>3）支持自动重新加载配置文件，不需要另外创建扫描线程来监视。</p><p>4）既然是巨佬的新作，那必然在性能上有了很大的提升，不然呢？</p><h3 id="_02、logback-使用示例" tabindex="-1"><a class="header-anchor" href="#_02、logback-使用示例" aria-hidden="true">#</a> 02、Logback 使用示例</h3><p><strong>第一步</strong>，在 pom.xml 文件中添加 Logback 的依赖：</p><div class="language-xml ext-xml line-numbers-mode"><pre class="language-xml"><code><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>dependency</span><span class="token punctuation">&gt;</span></span>
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sidebar-page" aria-label="谷歌开源的Gson"><!---->谷歌开源的Gson<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/gongju/jackson.html" class="nav-link sidebar-link sidebar-page" aria-label="SpringBoot内置的Jackson"><!---->SpringBoot内置的Jackson<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/gongju/log4j.html" class="nav-link sidebar-link sidebar-page" aria-label="日志框架的鼻祖Log4j"><!---->日志框架的鼻祖Log4j<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/gongju/log4j2.html" class="nav-link sidebar-link sidebar-page" aria-label="高性能日志框架Log4j2"><!---->高性能日志框架Log4j2<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/gongju/logback.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="Spring Boot内置的Logback"><!---->Spring Boot内置的Logback<!----></a><ul class="sidebar-sub-headers"><li 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href="/gongju/logback.html#_04、logback-手册" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="04、Logback 手册"><!---->04、Logback 手册<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/gongju/slf4j.html" class="nav-link sidebar-link sidebar-page" aria-label="日志门面SLF4J"><!---->日志门面SLF4J<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.7 分布式</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.8 消息队列</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Logback：Spring Boot内置的日志处理框架</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月17日</span><meta property="datePublished" content="2022-03-17T03:18:03.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category5" role>Java企业级开发</li><meta property="articleSection" content="Java企业级开发"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag1" role>辅助工具/轮子</li></ul><meta property="keywords" content="辅助工具/轮子"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 10 分钟</span><meta property="timeRequired" content="PT10M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/logback.html#_01、logback-强在哪" class="router-link-active router-link-exact-active toc-link level3">01、Logback 强在哪</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/logback.html#_02、logback-使用示例" class="router-link-active router-link-exact-active toc-link level3">02、Logback 使用示例</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/logback.html#_03、把-log4j-properties-转成-logback-test-xml" class="router-link-active router-link-exact-active toc-link level3">03、把 log4j.properties 转成 logback-test.xml</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/logback.html#_04、logback-手册" class="router-link-active router-link-exact-active toc-link level3">04、Logback 手册</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><p>就在昨天，老板听我说完 Logback 有多牛逼之后，彻底动心了，对我下了死命令，“这么好的日志系统，你还不赶紧点，把它切换到咱的项目当中！”</p><p>我们项目之前用的 Log4j，在我看来，已经足够用了，毕竟是小公司，性能上的要求没那么苛刻。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/logback-320329e9-a754-427f-8a19-2e4f809b6a6f.png" alt=""></p><p><a href="https://mp.weixin.qq.com/s/AXgNnJe8djD901EmhFkWUg" target="_blank" rel="noopener noreferrer">Log4j<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a> 介绍过了，<a href="https://mp.weixin.qq.com/s/EhKf1rHWL-QII0f6eo0uVA" target="_blank" rel="noopener noreferrer">SLF4J<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a> 也介绍过了，那接下来，你懂的，Logback 就要隆重地登场了，毕竟它哥仨有一个爹，那就是巨佬 Ceki Gulcu。</p><h3 id="_01、logback-强在哪" tabindex="-1"><a class="header-anchor" href="#_01、logback-强在哪" aria-hidden="true">#</a> 01、Logback 强在哪</h3><p>1）非常自然地实现了 SLF4J，不需要像 Log4j 和 JUL 那样加一个适配层。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/logback-6ba1b465-5533-49dd-b875-48a10ba29f8e.png" alt=""></p><p>2）Spring Boot 的默认日志框架使用的是 Logback。一旦某款工具库成为了默认选项，那就说明这款工具已经超过了其他竞品。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/logback-2696cd8b-7e8c-4476-9a06-272fd22fa4b6.png" alt=""></p><p>注意看下图（证据找到了，来自 <a href="https://docs.spring.io/spring-boot/docs/current/reference/html/spring-boot-features.html#boot-features-logging" target="_blank" rel="noopener noreferrer">Spring Boot 官网<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>）：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/logback-82d78a15-8ae0-4377-a7af-aebd5cda4fda.png" alt=""></p><p>也可以通过源码的形式看得到：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/logback-2df2d06e-1b01-428b-8444-d765056e25bb.png" alt=""></p><p>3）支持自动重新加载配置文件，不需要另外创建扫描线程来监视。</p><p>4）既然是巨佬的新作，那必然在性能上有了很大的提升，不然呢？</p><h3 id="_02、logback-使用示例" tabindex="-1"><a class="header-anchor" href="#_02、logback-使用示例" aria-hidden="true">#</a> 02、Logback 使用示例</h3><p><strong>第一步</strong>，在 pom.xml 文件中添加 Logback 的依赖：</p><div class="language-xml ext-xml line-numbers-mode"><pre class="language-xml"><code><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>dependency</span><span class="token punctuation">&gt;</span></span>
     <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>groupId</span><span class="token punctuation">&gt;</span></span>ch.qos.logback<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>groupId</span><span class="token punctuation">&gt;</span></span>
     <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>artifactId</span><span class="token punctuation">&gt;</span></span>logback-classic<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>artifactId</span><span class="token punctuation">&gt;</span></span>
     <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>version</span><span class="token punctuation">&gt;</span></span>1.2.3<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>version</span><span class="token punctuation">&gt;</span></span>
@@ -229,6 +229,6 @@ log4j.appender.E.layout.ConversionPattern = %d{yyyy-MM-dd HH:mm:ss}  [ %t:%r ] -
     <span class="token punctuation">}</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>运行后，可以在 target 目录下看到两个文件：debug.log 和 errror.log。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/logback-536aa50e-b195-403e-8409-85e4f6966522.png" alt=""></p><p>到此为止，项目已经从 Log4j 切换到 Logback 了，过程非常的丝滑顺畅，嘿嘿。</p><h3 id="_04、logback-手册" tabindex="-1"><a class="header-anchor" href="#_04、logback-手册" aria-hidden="true">#</a> 04、Logback 手册</h3><p>Logback 的官网上是有一份手册的，非常详细，足足 200 多页，只不过是英文版的。小伙伴们可以看完我这篇文章入门实操的 Logback 教程后，到下面的地址看官方手册。</p><blockquote><p><a href="http://logback.qos.ch/manual/index.html" target="_blank" rel="noopener noreferrer">http://logback.qos.ch/manual/index.html<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>如果英文阅读能力有限的话，可以到 GitHub 上查看雷锋翻译的中文版：</p><blockquote><p><a href="https://github.com/itwanger/logback-chinese-manual" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/logback-chinese-manual<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>当然了，还有一部分小伙伴喜欢看离线版的 PDF，我已经整理好了：</p><blockquote><p>链接:<a href="https://pan.baidu.com/s/16FrbwycYUUIfKknlLhRKYA" target="_blank" rel="noopener noreferrer">https://pan.baidu.com/s/16FrbwycYUUIfKknlLhRKYA<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a> 密码:bptl</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/gongju/logback.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 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class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->SLF4J：阿里巴巴强制使用的日志门面担当</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 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13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 10 分钟</span><meta property="timeRequired" content="PT10M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/slf4j.html#_01、slf4j-是什么" class="router-link-active router-link-exact-active toc-link level3">01、SLF4J 是什么</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/slf4j.html#_02、slf4j-解决了什么痛点" class="router-link-active router-link-exact-active toc-link level3">02、SLF4J 解决了什么痛点</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/slf4j.html#_03、slf4j-比-log4j-强在哪" class="router-link-active router-link-exact-active toc-link level3">03、SLF4J 比 Log4J 强在哪</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/slf4j.html#_04、总结" class="router-link-active router-link-exact-active toc-link level3">04、总结</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><p>我在读嵩山版的阿里巴巴开发手册（没有的小伙伴，记着找我要）的时候，就发现了一条「<strong>强制</strong>」性质的日志规约：</p><blockquote><p>应用中不可以直接使用日志系统（Log4j、Logback）中的 API，而应该使用日志框架中的 API，比如说 SLF4J，使用门面模式的日志框架，有利于维护和统一各个类的日志处理方式。</p></blockquote><p>（为什么我把这段文字手敲了下来呢，因为我发现阿里巴巴开发手册上的有语病，瞧下面红色标出的部分）</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/slf4j-94ba034a-c6e6-46e0-bff3-b658bf35945f.png" alt=""></p><p>（维护和统一，把统一放在最后面读起来真的是别扭，和的有点牵强，请问手册的小编是数学老师教的语文吧？）</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/slf4j-a7a6e0ae-cbee-428e-8a45-2f5a33243625.png" alt=""></p><p>那看到这条强制性的规约，我就忍不住想要问：“为什么阿里巴巴开发手册会强制使用 SLF4J 作为 Log4J 的门面担当呢？”究竟这背后藏了什么“不可告人”的秘密？</p><p>（请小伙伴们自行配上 CCTV 12 台的那种 BGM）</p><p>PS：顺带给小伙伴们普及一点小知识，阿里巴巴开发手册上出现的 Jakarta 其实是 Apache 软件基金会下的一个开源项目。其实 Commons 是以前隶属于 Jakarta，现在是作为 Apache 下的一个单独项目，阿里巴巴开发手册上的描述已经不太恰当了，换成是 Apache Commons Logging 会更合适一点。</p><p>（忍不住又给阿里巴巴开发手册挑了一个毛病，请原谅我“一丝不苟”的做事态度）</p><h3 id="_01、slf4j-是什么" tabindex="-1"><a class="header-anchor" href="#_01、slf4j-是什么" aria-hidden="true">#</a> 01、SLF4J 是什么</h3><p>SLF4J 是 Simple Logging Facade for Java 的缩写（for≈4），也就是简易的日志门面，以外观模式（Facade pattern，一种设计模式，为子系统中的一组接口提供一个统一的高层接口，使得子系统更容易使用）实现，支持 java.util.logging、Log4J 和 Logback。</p><p>SLF4J 的作者就是 Log4J 和 Logback 的作者，他的 GitHub 主页长下面这样：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/slf4j-c72cd63d-b15b-401c-8399-ad0355f1f802.png" alt=""></p><p>一股秋风瑟瑟的清冷感扑面而来，有没有？可能巨佬不屑于维护他的 GitHub 主页吧？我的 GitHub 主页够凄惨了，没想到巨佬比我还惨，终于可以吹牛逼地说，“我，沉默王二，GitHub 主页比 SLF4J、Log4J 和 Logback 的作者 Ceki Gulcu 绿多了。。。。。。”</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/slf4j-cdc9e0fb-71ab-42e7-8024-7e9cfd9b30c3.png" alt=""></p><p>1996 年初，欧洲安全电子市场项目决定编写自己的跟踪 API，最后该 API 演变成了 Log4j，已经推出就备受宠爱。</p><p>2002 年 2 月，Sun 推出了自己的日志包 java.util.logging（可称 JUL），据说实现思想借鉴了 Log4j，毕竟此时的 Log4j 已经很成熟了。</p><p>2002 年 8 月，Apache 就推出了自己的日志包，也就是阿里巴巴开发手册上提到的 JCL（Jakarta Commons Logging）。JCL 的野心很大，它在 JUL 和 Log4j 的基础上提供了一个抽象层的接口，方便使用者在 JUL 和 Log4j 之间切换。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/slf4j-5b40fac4-0ab1-467d-9dc1-85c43ed879e7.png" alt=""></p><p>但 JCL 好像并不怎么招人喜欢，有人是这样抱怨的：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/slf4j-795d5543-7bd1-450a-8a35-a151be106b3b.png" alt=""></p><p>Ceki Gulcu 也觉得 JCL 不好，要不然他也不会在 2005 年自己撸一个名叫 SLF4J 的新项目，对吧？但出来混总是要付出代价的，SLF4J 只有接口，没有实现，总不能强逼着 Java 和 Apache 去实现 SLF4J 接口吧？这太难了，不现实。</p><p>但巨佬之所以称之为巨佬，是因为他拥有超出普通人的惊人之处，他在 SLF4J 和 JUL、Log4j、JCL 之间搭了三座桥：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/slf4j-3044b416-ff14-408f-b933-71993b7ddeee.png" alt=""></p><p>巨佬动手，丰衣足食，有没有？狠起来连自己的 Log4j 都搭个桥。</p><p>面对巨佬的霸气，我只想弱弱地说一句，“ SLF4J 这个门面担当，你以为好当的啊？”</p><h3 id="_02、slf4j-解决了什么痛点" tabindex="-1"><a class="header-anchor" href="#_02、slf4j-解决了什么痛点" aria-hidden="true">#</a> 02、SLF4J 解决了什么痛点</h3><p>春秋战国的时候，每个国家都有自己的货币，用别国的货币也不合适，对吧？那在发生贸易的时候就比较麻烦了，货币不统一，就没法直接交易，因为货币可能不等价。</p><p>那秦始皇统一六国后，就推出了新的货币政策，全国都用一种货币，那之前的问题就解决掉了。</p><p>你看，同样的道理，日志系统有 JUL、JCL，Ceki Gulcu 自己又写了 2 种，Log4j 和 Logback，各有各的优缺点，再加上使用者千千万，萝卜白菜各有所爱，这就导致不同的应用可能会用不同的日志系统。</p><p>假设我们正在开发一套系统，打算用 SLF4J 作为门面，Log4j 作为日志系统，我们在项目中使用了 A 框架，而 A 框架的门面是 JCL，日志系统是 JUL，那就相等于要维护两套日志系统，对吧？</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/slf4j-e66a78a6-1ef6-42c1-86fa-a4c57b3ef160.png" alt=""></p><p>这就难受了！</p><p>Ceki Gulcu 想到了这个问题，并且帮我们解决了！来看 SLF4J 官网给出的解决方案。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/slf4j-5e1021d6-6a81-492b-b8d3-f9438014b53b.png" alt=""></p><ul><li>使用 jcl-over-slf4j.jar 替换 commons-logging.jar</li><li>引入 jul-to-slf4j.jar</li></ul><p>为了模拟这个过程，我们来建一个使用 JCL 的项目。</p><p>第一步，在 pom.xml 文件中引入 commons-logging.jar：</p><div class="language-xml ext-xml line-numbers-mode"><pre class="language-xml"><code><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>dependency</span><span class="token punctuation">&gt;</span></span>
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class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="日志门面SLF4J"><!---->日志门面SLF4J<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/gongju/slf4j.html#_01、slf4j-是什么" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="01、SLF4J 是什么"><!---->01、SLF4J 是什么<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/gongju/slf4j.html#_02、slf4j-解决了什么痛点" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="02、SLF4J 解决了什么痛点"><!---->02、SLF4J 解决了什么痛点<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/gongju/slf4j.html#_03、slf4j-比-log4j-强在哪" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="03、SLF4J 比 Log4J 强在哪"><!---->03、SLF4J 比 Log4J 强在哪<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/gongju/slf4j.html#_04、总结" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="04、总结"><!---->04、总结<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.7 分布式</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.8 消息队列</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->SLF4J：阿里巴巴强制使用的日志门面担当</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span 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0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category5" role>Java企业级开发</li><meta property="articleSection" content="Java企业级开发"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag1" role>辅助工具/轮子</li></ul><meta property="keywords" content="辅助工具/轮子"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 10 分钟</span><meta property="timeRequired" content="PT10M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/slf4j.html#_01、slf4j-是什么" class="router-link-active router-link-exact-active toc-link level3">01、SLF4J 是什么</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/slf4j.html#_02、slf4j-解决了什么痛点" class="router-link-active router-link-exact-active toc-link level3">02、SLF4J 解决了什么痛点</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/slf4j.html#_03、slf4j-比-log4j-强在哪" class="router-link-active router-link-exact-active toc-link level3">03、SLF4J 比 Log4J 强在哪</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/slf4j.html#_04、总结" class="router-link-active router-link-exact-active toc-link level3">04、总结</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><p>我在读嵩山版的阿里巴巴开发手册（没有的小伙伴，记着找我要）的时候，就发现了一条「<strong>强制</strong>」性质的日志规约：</p><blockquote><p>应用中不可以直接使用日志系统（Log4j、Logback）中的 API，而应该使用日志框架中的 API，比如说 SLF4J，使用门面模式的日志框架，有利于维护和统一各个类的日志处理方式。</p></blockquote><p>（为什么我把这段文字手敲了下来呢，因为我发现阿里巴巴开发手册上的有语病，瞧下面红色标出的部分）</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/slf4j-94ba034a-c6e6-46e0-bff3-b658bf35945f.png" alt=""></p><p>（维护和统一，把统一放在最后面读起来真的是别扭，和的有点牵强，请问手册的小编是数学老师教的语文吧？）</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/slf4j-a7a6e0ae-cbee-428e-8a45-2f5a33243625.png" alt=""></p><p>那看到这条强制性的规约，我就忍不住想要问：“为什么阿里巴巴开发手册会强制使用 SLF4J 作为 Log4J 的门面担当呢？”究竟这背后藏了什么“不可告人”的秘密？</p><p>（请小伙伴们自行配上 CCTV 12 台的那种 BGM）</p><p>PS：顺带给小伙伴们普及一点小知识，阿里巴巴开发手册上出现的 Jakarta 其实是 Apache 软件基金会下的一个开源项目。其实 Commons 是以前隶属于 Jakarta，现在是作为 Apache 下的一个单独项目，阿里巴巴开发手册上的描述已经不太恰当了，换成是 Apache Commons Logging 会更合适一点。</p><p>（忍不住又给阿里巴巴开发手册挑了一个毛病，请原谅我“一丝不苟”的做事态度）</p><h3 id="_01、slf4j-是什么" tabindex="-1"><a class="header-anchor" href="#_01、slf4j-是什么" aria-hidden="true">#</a> 01、SLF4J 是什么</h3><p>SLF4J 是 Simple Logging Facade for Java 的缩写（for≈4），也就是简易的日志门面，以外观模式（Facade pattern，一种设计模式，为子系统中的一组接口提供一个统一的高层接口，使得子系统更容易使用）实现，支持 java.util.logging、Log4J 和 Logback。</p><p>SLF4J 的作者就是 Log4J 和 Logback 的作者，他的 GitHub 主页长下面这样：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/slf4j-c72cd63d-b15b-401c-8399-ad0355f1f802.png" alt=""></p><p>一股秋风瑟瑟的清冷感扑面而来，有没有？可能巨佬不屑于维护他的 GitHub 主页吧？我的 GitHub 主页够凄惨了，没想到巨佬比我还惨，终于可以吹牛逼地说，“我，沉默王二，GitHub 主页比 SLF4J、Log4J 和 Logback 的作者 Ceki Gulcu 绿多了。。。。。。”</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/slf4j-cdc9e0fb-71ab-42e7-8024-7e9cfd9b30c3.png" alt=""></p><p>1996 年初，欧洲安全电子市场项目决定编写自己的跟踪 API，最后该 API 演变成了 Log4j，已经推出就备受宠爱。</p><p>2002 年 2 月，Sun 推出了自己的日志包 java.util.logging（可称 JUL），据说实现思想借鉴了 Log4j，毕竟此时的 Log4j 已经很成熟了。</p><p>2002 年 8 月，Apache 就推出了自己的日志包，也就是阿里巴巴开发手册上提到的 JCL（Jakarta Commons Logging）。JCL 的野心很大，它在 JUL 和 Log4j 的基础上提供了一个抽象层的接口，方便使用者在 JUL 和 Log4j 之间切换。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/slf4j-5b40fac4-0ab1-467d-9dc1-85c43ed879e7.png" alt=""></p><p>但 JCL 好像并不怎么招人喜欢，有人是这样抱怨的：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/slf4j-795d5543-7bd1-450a-8a35-a151be106b3b.png" alt=""></p><p>Ceki Gulcu 也觉得 JCL 不好，要不然他也不会在 2005 年自己撸一个名叫 SLF4J 的新项目，对吧？但出来混总是要付出代价的，SLF4J 只有接口，没有实现，总不能强逼着 Java 和 Apache 去实现 SLF4J 接口吧？这太难了，不现实。</p><p>但巨佬之所以称之为巨佬，是因为他拥有超出普通人的惊人之处，他在 SLF4J 和 JUL、Log4j、JCL 之间搭了三座桥：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/slf4j-3044b416-ff14-408f-b933-71993b7ddeee.png" alt=""></p><p>巨佬动手，丰衣足食，有没有？狠起来连自己的 Log4j 都搭个桥。</p><p>面对巨佬的霸气，我只想弱弱地说一句，“ SLF4J 这个门面担当，你以为好当的啊？”</p><h3 id="_02、slf4j-解决了什么痛点" tabindex="-1"><a class="header-anchor" href="#_02、slf4j-解决了什么痛点" aria-hidden="true">#</a> 02、SLF4J 解决了什么痛点</h3><p>春秋战国的时候，每个国家都有自己的货币，用别国的货币也不合适，对吧？那在发生贸易的时候就比较麻烦了，货币不统一，就没法直接交易，因为货币可能不等价。</p><p>那秦始皇统一六国后，就推出了新的货币政策，全国都用一种货币，那之前的问题就解决掉了。</p><p>你看，同样的道理，日志系统有 JUL、JCL，Ceki Gulcu 自己又写了 2 种，Log4j 和 Logback，各有各的优缺点，再加上使用者千千万，萝卜白菜各有所爱，这就导致不同的应用可能会用不同的日志系统。</p><p>假设我们正在开发一套系统，打算用 SLF4J 作为门面，Log4j 作为日志系统，我们在项目中使用了 A 框架，而 A 框架的门面是 JCL，日志系统是 JUL，那就相等于要维护两套日志系统，对吧？</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/slf4j-e66a78a6-1ef6-42c1-86fa-a4c57b3ef160.png" alt=""></p><p>这就难受了！</p><p>Ceki Gulcu 想到了这个问题，并且帮我们解决了！来看 SLF4J 官网给出的解决方案。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/slf4j-5e1021d6-6a81-492b-b8d3-f9438014b53b.png" alt=""></p><ul><li>使用 jcl-over-slf4j.jar 替换 commons-logging.jar</li><li>引入 jul-to-slf4j.jar</li></ul><p>为了模拟这个过程，我们来建一个使用 JCL 的项目。</p><p>第一步，在 pom.xml 文件中引入 commons-logging.jar：</p><div class="language-xml ext-xml line-numbers-mode"><pre class="language-xml"><code><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>dependency</span><span class="token punctuation">&gt;</span></span>
     <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>groupId</span><span class="token punctuation">&gt;</span></span>commons-logging<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>groupId</span><span class="token punctuation">&gt;</span></span>
     <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>artifactId</span><span class="token punctuation">&gt;</span></span>commons-logging<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>artifactId</span><span class="token punctuation">&gt;</span></span>
     <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>version</span><span class="token punctuation">&gt;</span></span>1.2<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>version</span><span class="token punctuation">&gt;</span></span>
@@ -153,6 +153,6 @@ logger<span class="token punctuation">.</span><span class="token function">debug
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>在调试这段代码的时候，你会发现的，如下图所示：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/slf4j-4ae3eda7-cd0d-4094-9331-d6070a39c8ea.png" alt=""></p><p>这也就意味着，如果日志系统的级别不是 DEBUG，就会多执行了字符串拼接的操作，白白浪费了性能。</p><p>注意，阿里巴巴开发手册上还有一条「<strong>强制</strong>」级别的规约：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/slf4j-51004734-620a-4c1a-8aa7-6d7f3e1781d6.png" alt=""></p><p>这是因为如果参数是基本数据类型的话，会先进行自动装箱（<code>Integer.valueOf()</code>）。测试代码如下所示：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code>logger<span class="token punctuation">.</span><span class="token function">debug</span><span class="token punctuation">(</span><span class="token string">&quot;沉默王二，{}岁&quot;</span><span class="token punctuation">,</span> <span class="token number">18</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>通过反编译工具就可以看得到：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code>logger<span class="token punctuation">.</span><span class="token function">debug</span><span class="token punctuation">(</span><span class="token string">&quot;\u6C89\u9ED8\u738B\u4E8C\uFF0C{}\u5C81&quot;</span><span class="token punctuation">,</span> <span class="token class-name">Integer</span><span class="token punctuation">.</span><span class="token function">valueOf</span><span class="token punctuation">(</span><span class="token number">18</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>如果参数需要调用其他方法的话，<code>debug()</code> 方法会随后调用。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/slf4j-aec16f40-7849-4a1d-9507-9119707e6c79.png" alt=""></p><p>也就是说，如果不 <code>isDebugEnabled()</code> 的话，在不是 DEBUG 级别的情况下，会多执行自动装箱和调用其他方法的操作——程序的性能就下降了！</p><p>测试类运行的结果和之前 Log4J 的一样，小伙伴们可以点击链接跳转到 <a href="https://mp.weixin.qq.com/s/AXgNnJe8djD901EmhFkWUg" target="_blank" rel="noopener noreferrer">Log4j 那篇<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>对比下。</p><h3 id="_04、总结" tabindex="-1"><a class="header-anchor" href="#_04、总结" aria-hidden="true">#</a> 04、总结</h3><p>简单总结一下这篇文章哈。</p><p>1）在使用日志系统的时候，一定要使用 SLF4J 作为门面担当。</p><p>2）SLF4J 可以统一日志系统，作为上层的抽象接口，不需要关注底层的日志实现，可以是 Log4j，也可以是 Logback，或者 JUL、JCL。</p><p>3）SLF4J 在打印日志的时候可以使用占位符，既提高了程序性能（临时字符串少了，垃圾回收的工作量就小），又让代码变得美观统一。</p><p>4）小伙伴们如果知道更多秘密的话，建议在留言区贴出来哦。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/gongju/slf4j.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/24 下午5:00:49</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/gongju/logback.html" class="nav-link prev" aria-label="Spring Boot内置的Logback"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->Spring Boot内置的Logback</div></a><!----></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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diff --git a/dist/gongju/tabby.html b/dist/gongju/tabby.html
index d4a89d3f..c73e2504 100644
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aria-label="/gongju/baota-mianban.md"><!---->/gongju/baota-mianban.md<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.6 开源轮子</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.7 分布式</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.8 消息队列</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Tabby：一款逼格更高的开源终端工具</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 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0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category5" role>Java企业级开发</li><meta property="articleSection" content="Java企业级开发"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag1" role>辅助工具/轮子</li></ul><meta property="keywords" content="辅助工具/轮子"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 6 分钟</span><meta property="timeRequired" content="PT6M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/tabby.html#一、安装-tabby" class="router-link-active router-link-exact-active toc-link level3">一、安装 Tabby</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/tabby.html#二、ssh-连接" class="router-link-active router-link-exact-active toc-link level2">二、SSH 连接</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/tabby.html#三、sftp-传输文件" class="router-link-active router-link-exact-active toc-link level3">三、SFTP 传输文件</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/tabby.html#四、配置-tabby" class="router-link-active router-link-exact-active toc-link level3">四、配置 Tabby</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/tabby.html#五、总结" class="router-link-active router-link-exact-active toc-link level3">五、总结</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><p>作为一名 Java 后端开发，日常工作中免不了要和 Linux 服务器打交道，因为生产环境基本上都是部署在 Linux 环境下的。以前呢，我会选择 Xshell 来作为终端进行远程操作。</p><p>随着付费版本的出现，尤其是 Xshell 把 FTP 分离出去后，上传下载文件的话还需要单独装一下 Xftp，这显然没有之前集成在一起方便😖。</p><p>还有一点让我费解的是，Xshell 竟然一直没有推出 macOS 版。</p><p>不过，滴水之恩当涌泉相报，我还是要说，Xshell 真的是非常的 Nice，从实习到现在，Windows 环境下，我基本上一直在用，差不多有快 10 年的时间了，感情还是在的。</p><p>相信很多小伙伴也在问，有没有一款，<strong>集成了 FTP 功能，并且跨平台的终端工具呢？如果能免费开源的话，就更好了</strong>！</p><p>答案是有的，它就是 <strong>Tabby</strong>！</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/tabby-01.png" alt=""></p><p>GitHub 上已经有 21.4k 的 star 了，这说明 Tabby 非常的受欢迎：</p><blockquote><p><a href="https://github.com/eugeny/tabby" target="_blank" rel="noopener noreferrer">https://github.com/eugeny/tabby<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><em>Tabby：二哥，我谢谢你呀，能再吹两句吗？</em></p><p>Tabby 是一个高度可定制化的 跨平台的终端工具，支持 Windows、macOS 和 Linux，自带 SFTP 功能，能与 Linux 服务器轻松传输文件，支持多种主题，界面炫酷，插件丰富。</p><h3 id="一、安装-tabby" tabindex="-1"><a class="header-anchor" href="#一、安装-tabby" aria-hidden="true">#</a> 一、安装 Tabby</h3><p>直接到官网 <a href="https://tabby.sh/" target="_blank" rel="noopener noreferrer">tabby.sh<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a> 点击「download」按钮就可以跳转到下载页面，最新的 release 版本是 1.0.164。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/tabby-02.png" alt=""></p><p>Linux 和 Windows 的比较好选，macOS 分为两个版本，一个是 arm64，一个是 x86-64，什么意思呢？</p><p>这里简单普及下哈。</p><blockquote><p>ARM是英国ARM公司提供一种CPU架构的知识产权，目前主流的手机和平板电脑都采用ARM架构，但 ARM 不生产芯片，只是从各种嵌入式设备、智能手机、平板电脑、智能穿戴和物联网设备体内的上亿颗处理器中“抽成”。</p></blockquote><p>Apple M1 是苹果公司的第一款基于ARM架构的自研处理器单片系统。</p><blockquote><p>X86_X64 源于英特尔几十年前出品的CPU型号8086，包括后续型号8088/80286/80386/80486/80586等等，8086以及8088被当时的IBM采用，制造出了名噪一时的IBM PC机，从此个人电脑风靡一时。</p></blockquote><p>详情可参阅下面这篇：</p><blockquote><p><a href="https://www.cnblogs.com/zhaoqingqing/p/13145115.html" target="_blank" rel="noopener noreferrer">https://www.cnblogs.com/zhaoqingqing/p/13145115.html<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>从这一点上可以证明，Tabby 的更新是非常勤快的，连 macOS 的最新芯片 M1 都支持了，厉害了呀，我的虎斑猫（Tabby）！</p><p>按照提示，一步步安装就 OK 了。完成后打开，这界面还是非常炫酷的。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/tabby-03.png" alt=""></p><h2 id="二、ssh-连接" tabindex="-1"><a class="header-anchor" href="#二、ssh-连接" aria-hidden="true">#</a> 二、SSH 连接</h2><p>SSH，也就是 Secure Shell（安全外壳协议），是一种加密的网络传输协议，可在不安全的网络中为网络服务提供安全的传输环境，通过在网络中创建安全隧道来实现 SSH 客户端和服务器端之间的连接。</p><p>之前说要带大家玩转 Linux 服务器，我们先安装了<a href="https://mp.weixin.qq.com/s/ditN9J80rSWwnYRumwb4ww" target="_blank" rel="noopener noreferrer">宝塔面板<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>这个神器。宝塔里面有自带的终端，但说实话，体验一般。</p><p>那不妨我们就使用 Tabby 来与服务器建立一个 SSH 连接吧。</p><p>点击「setting」→「profiles &amp; connections」→「new profile」。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/tabby-04.png" alt=""></p><p>填写服务器的 IP 地址和密码，然后点击「save」。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/tabby-05.png" alt=""></p><p>之后点击「运行」按钮，就可以进入到终端页面了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/tabby-06.png" alt=""></p><p>好了，现在可以对服务器进行操作了，执行下 top 命令可以查看服务器上正在运行的进程信息。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/tabby-07.png" alt=""></p><h3 id="三、sftp-传输文件" tabindex="-1"><a class="header-anchor" href="#三、sftp-传输文件" aria-hidden="true">#</a> 三、SFTP 传输文件</h3><p>Tabby 集成了 SFTP，所以上传下载文件就变得非常的简单。只需要点击一下「SFTP」图标就可以打开文件传输窗口。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/tabby-08.png" alt=""></p><p>上传的时候支持拖拽，完成后会弹出文件传输成功的提示消息。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/tabby-09.png" alt=""></p><p>下载的时候点击要下载的文件，然后会弹出存储对话框，选择对应的文件夹，以及修改对应的文件名点击「存储」就可以了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/tabby-10.png" alt=""></p><h3 id="四、配置-tabby" tabindex="-1"><a class="header-anchor" href="#四、配置-tabby" aria-hidden="true">#</a> 四、配置 Tabby</h3><p>「Settings」 的面板下有一个「Appearance」的菜单，可以对 Tabby 的外观进行设置，比如说调整字体，比如说自定义样式。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/tabby-11.png" alt=""></p><p>「Appearance」的菜单可以对 Tabby 的配色方案进行修改，里面的主题非常多，不过我感觉默认的就挺不错，毕竟是官方推荐的。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/tabby-12.png" alt=""></p><p>「Plugins」 菜单中还有不少插件可供扩展。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/tabby-13.png" alt=""></p><ul><li><a href="https://github.com/Eugeny/tabby-clickable-links" target="_blank" rel="noopener noreferrer">clickable-links<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a> - 使终端中的路径和 URL 可点击</li><li><a href="https://github.com/Eugeny/tabby-docker" target="_blank" rel="noopener noreferrer">docker<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a> - 连接到 Docker 容器</li><li><a href="https://github.com/kbjr/terminus-title-control" target="_blank" rel="noopener noreferrer">title-control<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a> - 允许通过提供要删除的前缀、后缀和/或字符串来修改终端选项卡的标题</li><li><a href="https://github.com/Domain/terminus-quick-cmds" target="_blank" rel="noopener noreferrer">quick-cmds<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a> - 快速向一个或所有终端选项卡发送命令</li><li><a href="https://github.com/Eugeny/tabby-save-output" target="_blank" rel="noopener noreferrer">save-output<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a> - 将终端输出记录到文件中</li></ul><p>这里重点说一下「sync config」 这个插件，可以将配置同步到Github或者Gitee的插件。点击「Get」就可以安装，之后会提示你重启生效。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/tabby-14.png" alt=""></p><p>生效后点击「Sync Config」菜单，就可以看到配置项了，类型可以选择 GitHub、Gitee、GitLab。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/tabby-15.png" alt=""></p><p>这里以 Gitee 为例，进入个人 Gitee 主页，左侧菜单中选择「私人令牌」，然后点击「生成新令牌」。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/tabby-16.png" alt=""></p><p>提交后会生成 token，复制到 Tabby 的 Token 输入框中，然后点击「Upload config」，就可以看到配置信息同步成功了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/tabby-17.png" alt=""></p><p>「Window」 菜单中可以对当前窗口进行设置，比如说改变窗口的主题为 Paper，改变 tab 的位置到底部等等。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/tabby-18.png" alt=""></p><h3 id="五、总结" tabindex="-1"><a class="header-anchor" href="#五、总结" aria-hidden="true">#</a> 五、总结</h3><p>SSH 连接和 SFTP 传输恐怕是我们操作 Linux 服务器最常用的两个功能了，那 Tabby 对这两个功能的支持非常的友好，足够的轻量级。关键它是跨平台的，Windows、macOS 都可以用，再把配置信息同步到云上后，多平台下切换起来简直不要太舒服。</p><p>Windows 用户习惯用 Xshell，macOS 用户习惯用 iTerm2，但这两款工具都没办法跨平台，多平台操作的用户就可以选择 Tabby 来体验一下，真心不错。</p><p>Tabby 的学习资料还比较少，所以希望二哥的这篇文章能给有需要的小伙伴提供一点点的帮助和启发。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/gongju/tabby.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 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right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.7 分布式</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.8 消息队列</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Tabby：一款逼格更高的开源终端工具</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 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aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category5" role>Java企业级开发</li><meta property="articleSection" content="Java企业级开发"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag1" role>辅助工具/轮子</li></ul><meta property="keywords" content="辅助工具/轮子"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 6 分钟</span><meta property="timeRequired" content="PT6M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/tabby.html#一、安装-tabby" class="router-link-active router-link-exact-active toc-link level3">一、安装 Tabby</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/tabby.html#二、ssh-连接" class="router-link-active router-link-exact-active toc-link level2">二、SSH 连接</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/tabby.html#三、sftp-传输文件" class="router-link-active router-link-exact-active toc-link level3">三、SFTP 传输文件</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/tabby.html#四、配置-tabby" class="router-link-active router-link-exact-active toc-link level3">四、配置 Tabby</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/tabby.html#五、总结" class="router-link-active router-link-exact-active toc-link level3">五、总结</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><p>作为一名 Java 后端开发，日常工作中免不了要和 Linux 服务器打交道，因为生产环境基本上都是部署在 Linux 环境下的。以前呢，我会选择 Xshell 来作为终端进行远程操作。</p><p>随着付费版本的出现，尤其是 Xshell 把 FTP 分离出去后，上传下载文件的话还需要单独装一下 Xftp，这显然没有之前集成在一起方便😖。</p><p>还有一点让我费解的是，Xshell 竟然一直没有推出 macOS 版。</p><p>不过，滴水之恩当涌泉相报，我还是要说，Xshell 真的是非常的 Nice，从实习到现在，Windows 环境下，我基本上一直在用，差不多有快 10 年的时间了，感情还是在的。</p><p>相信很多小伙伴也在问，有没有一款，<strong>集成了 FTP 功能，并且跨平台的终端工具呢？如果能免费开源的话，就更好了</strong>！</p><p>答案是有的，它就是 <strong>Tabby</strong>！</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/tabby-01.png" alt=""></p><p>GitHub 上已经有 21.4k 的 star 了，这说明 Tabby 非常的受欢迎：</p><blockquote><p><a href="https://github.com/eugeny/tabby" target="_blank" rel="noopener noreferrer">https://github.com/eugeny/tabby<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><em>Tabby：二哥，我谢谢你呀，能再吹两句吗？</em></p><p>Tabby 是一个高度可定制化的 跨平台的终端工具，支持 Windows、macOS 和 Linux，自带 SFTP 功能，能与 Linux 服务器轻松传输文件，支持多种主题，界面炫酷，插件丰富。</p><h3 id="一、安装-tabby" tabindex="-1"><a class="header-anchor" href="#一、安装-tabby" aria-hidden="true">#</a> 一、安装 Tabby</h3><p>直接到官网 <a href="https://tabby.sh/" target="_blank" rel="noopener noreferrer">tabby.sh<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a> 点击「download」按钮就可以跳转到下载页面，最新的 release 版本是 1.0.164。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/tabby-02.png" alt=""></p><p>Linux 和 Windows 的比较好选，macOS 分为两个版本，一个是 arm64，一个是 x86-64，什么意思呢？</p><p>这里简单普及下哈。</p><blockquote><p>ARM是英国ARM公司提供一种CPU架构的知识产权，目前主流的手机和平板电脑都采用ARM架构，但 ARM 不生产芯片，只是从各种嵌入式设备、智能手机、平板电脑、智能穿戴和物联网设备体内的上亿颗处理器中“抽成”。</p></blockquote><p>Apple M1 是苹果公司的第一款基于ARM架构的自研处理器单片系统。</p><blockquote><p>X86_X64 源于英特尔几十年前出品的CPU型号8086，包括后续型号8088/80286/80386/80486/80586等等，8086以及8088被当时的IBM采用，制造出了名噪一时的IBM PC机，从此个人电脑风靡一时。</p></blockquote><p>详情可参阅下面这篇：</p><blockquote><p><a href="https://www.cnblogs.com/zhaoqingqing/p/13145115.html" target="_blank" rel="noopener noreferrer">https://www.cnblogs.com/zhaoqingqing/p/13145115.html<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>从这一点上可以证明，Tabby 的更新是非常勤快的，连 macOS 的最新芯片 M1 都支持了，厉害了呀，我的虎斑猫（Tabby）！</p><p>按照提示，一步步安装就 OK 了。完成后打开，这界面还是非常炫酷的。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/tabby-03.png" alt=""></p><h2 id="二、ssh-连接" tabindex="-1"><a class="header-anchor" href="#二、ssh-连接" aria-hidden="true">#</a> 二、SSH 连接</h2><p>SSH，也就是 Secure Shell（安全外壳协议），是一种加密的网络传输协议，可在不安全的网络中为网络服务提供安全的传输环境，通过在网络中创建安全隧道来实现 SSH 客户端和服务器端之间的连接。</p><p>之前说要带大家玩转 Linux 服务器，我们先安装了<a href="https://mp.weixin.qq.com/s/ditN9J80rSWwnYRumwb4ww" target="_blank" rel="noopener noreferrer">宝塔面板<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>这个神器。宝塔里面有自带的终端，但说实话，体验一般。</p><p>那不妨我们就使用 Tabby 来与服务器建立一个 SSH 连接吧。</p><p>点击「setting」→「profiles &amp; connections」→「new profile」。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/tabby-04.png" alt=""></p><p>填写服务器的 IP 地址和密码，然后点击「save」。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/tabby-05.png" alt=""></p><p>之后点击「运行」按钮，就可以进入到终端页面了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/tabby-06.png" alt=""></p><p>好了，现在可以对服务器进行操作了，执行下 top 命令可以查看服务器上正在运行的进程信息。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/tabby-07.png" alt=""></p><h3 id="三、sftp-传输文件" tabindex="-1"><a class="header-anchor" href="#三、sftp-传输文件" aria-hidden="true">#</a> 三、SFTP 传输文件</h3><p>Tabby 集成了 SFTP，所以上传下载文件就变得非常的简单。只需要点击一下「SFTP」图标就可以打开文件传输窗口。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/tabby-08.png" alt=""></p><p>上传的时候支持拖拽，完成后会弹出文件传输成功的提示消息。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/tabby-09.png" alt=""></p><p>下载的时候点击要下载的文件，然后会弹出存储对话框，选择对应的文件夹，以及修改对应的文件名点击「存储」就可以了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/tabby-10.png" alt=""></p><h3 id="四、配置-tabby" tabindex="-1"><a class="header-anchor" href="#四、配置-tabby" aria-hidden="true">#</a> 四、配置 Tabby</h3><p>「Settings」 的面板下有一个「Appearance」的菜单，可以对 Tabby 的外观进行设置，比如说调整字体，比如说自定义样式。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/tabby-11.png" alt=""></p><p>「Appearance」的菜单可以对 Tabby 的配色方案进行修改，里面的主题非常多，不过我感觉默认的就挺不错，毕竟是官方推荐的。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/tabby-12.png" alt=""></p><p>「Plugins」 菜单中还有不少插件可供扩展。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/tabby-13.png" alt=""></p><ul><li><a href="https://github.com/Eugeny/tabby-clickable-links" target="_blank" rel="noopener noreferrer">clickable-links<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a> - 使终端中的路径和 URL 可点击</li><li><a href="https://github.com/Eugeny/tabby-docker" target="_blank" rel="noopener noreferrer">docker<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a> - 连接到 Docker 容器</li><li><a href="https://github.com/kbjr/terminus-title-control" target="_blank" rel="noopener noreferrer">title-control<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a> - 允许通过提供要删除的前缀、后缀和/或字符串来修改终端选项卡的标题</li><li><a href="https://github.com/Domain/terminus-quick-cmds" target="_blank" rel="noopener noreferrer">quick-cmds<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a> - 快速向一个或所有终端选项卡发送命令</li><li><a href="https://github.com/Eugeny/tabby-save-output" target="_blank" rel="noopener noreferrer">save-output<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a> - 将终端输出记录到文件中</li></ul><p>这里重点说一下「sync config」 这个插件，可以将配置同步到Github或者Gitee的插件。点击「Get」就可以安装，之后会提示你重启生效。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/tabby-14.png" alt=""></p><p>生效后点击「Sync Config」菜单，就可以看到配置项了，类型可以选择 GitHub、Gitee、GitLab。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/tabby-15.png" alt=""></p><p>这里以 Gitee 为例，进入个人 Gitee 主页，左侧菜单中选择「私人令牌」，然后点击「生成新令牌」。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/tabby-16.png" alt=""></p><p>提交后会生成 token，复制到 Tabby 的 Token 输入框中，然后点击「Upload config」，就可以看到配置信息同步成功了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/tabby-17.png" alt=""></p><p>「Window」 菜单中可以对当前窗口进行设置，比如说改变窗口的主题为 Paper，改变 tab 的位置到底部等等。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/tabby-18.png" alt=""></p><h3 id="五、总结" tabindex="-1"><a class="header-anchor" href="#五、总结" aria-hidden="true">#</a> 五、总结</h3><p>SSH 连接和 SFTP 传输恐怕是我们操作 Linux 服务器最常用的两个功能了，那 Tabby 对这两个功能的支持非常的友好，足够的轻量级。关键它是跨平台的，Windows、macOS 都可以用，再把配置信息同步到云上后，多平台下切换起来简直不要太舒服。</p><p>Windows 用户习惯用 Xshell，macOS 用户习惯用 iTerm2，但这两款工具都没办法跨平台，多平台操作的用户就可以选择 Tabby 来体验一下，真心不错。</p><p>Tabby 的学习资料还比较少，所以希望二哥的这篇文章能给有需要的小伙伴提供一点点的帮助和启发。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/gongju/tabby.md" rel="noopener noreferrer" 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aria-label="一、前言"><!---->一、前言<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">二、Java核心</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">三、Java企业级开发</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.1 开发工具</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.2 IDE/编辑器</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.3 Spring</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.4 SpringBoot</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">3.5 辅助工具</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/gongju/tabby.html" class="nav-link sidebar-link sidebar-page" aria-label="高逼格终端工具Tabby"><!---->高逼格终端工具Tabby<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/gongju/warp.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="21世纪人用的终端工具Warp"><!---->21世纪人用的终端工具Warp<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/gongju/warp.html#一、安装-warp" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="一、安装 Warp"><!---->一、安装 Warp<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/gongju/warp.html#二、使用-warp" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="二、使用 Warp"><!---->二、使用 Warp<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/gongju/warp.html#三、配置-warp" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="三、配置 Warp"><!---->三、配置 Warp<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/gongju/warp.html#四、总结" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="四、总结"><!---->四、总结<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/gongju/choco.html" class="nav-link sidebar-link sidebar-page" aria-label="Win命令行软件管理器Chocolatey"><!---->Win命令行软件管理器Chocolatey<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/gongju/chiner.html" class="nav-link sidebar-link sidebar-page" aria-label="数据库设计神器chiner"><!---->数据库设计神器chiner<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/gongju/DBeaver.html" class="nav-link sidebar-link sidebar-page" aria-label="数据库操作工具DBeaver"><!---->数据库操作工具DBeaver<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/gongju/baota-mianban.md" class="nav-link sidebar-link sidebar-page" aria-label="/gongju/baota-mianban.md"><!---->/gongju/baota-mianban.md<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.6 开源轮子</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.7 分布式</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.8 消息队列</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Warp：一款21世纪人用的终端工具</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年4月13日</span><meta property="datePublished" content="2022-04-13T08:53:39.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category5" role>Java企业级开发</li><meta property="articleSection" content="Java企业级开发"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag1" role>辅助工具/轮子</li></ul><meta property="keywords" content="辅助工具/轮子"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 6 分钟</span><meta property="timeRequired" content="PT6M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/warp.html#一、安装-warp" class="router-link-active router-link-exact-active toc-link level3">一、安装 Warp</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/warp.html#二、使用-warp" class="router-link-active router-link-exact-active toc-link level3">二、使用 Warp</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/warp.html#三、配置-warp" class="router-link-active router-link-exact-active toc-link level3">三、配置 Warp</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/warp.html#四、总结" class="router-link-active router-link-exact-active toc-link level3">四、总结</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><p>程序员的一生，用的最多的两个工具，一个是代码编辑器（Code Editor），另外一个就是命令行终端工具（Terminal）。这两个工具对于提高开发效率至关重要。</p><p>代码编辑器在过去的 40 年里不断进化，从我上大学敲 Java 代码开始，就经历了 MyEclipse、NetBeans、Eclipse，到如今称王称霸的 Intellij IDEA。</p><p>但终端工具，基本上和上个世纪七八十年代差不多。</p><p>那本期给大家推荐的这款终端——Warp——绝对会让你大开眼界，用完爱不释手！</p><blockquote><p>还记得之前给大家推荐的 <a href="https://mp.weixin.qq.com/s/HeUAPe4LqqjfzIeWDe8KIg" target="_blank" rel="noopener noreferrer">Tabby<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a> 吗？是时候喜新厌旧了。</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-e0411889-e506-480f-a719-eba4f2d229b4.png" alt=""></p><p>Warp，一个超级牛叉的 terminal，号称是 21 世纪的终端，还未正式发布，就获得了两千三百万美元的融资。</p><blockquote><p>官方网站：<a href="https://www.warp.dev/" target="_blank" rel="noopener noreferrer">https://www.warp.dev/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>Warp 在 GitHub 上也已经开源，目前已经有 2.8k+ 的 star 了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-17a2270c-3bd1-47eb-a205-b7defde42895.png" alt=""></p><blockquote><p>GitHub 地址：<a href="https://github.com/warpdotdev/Warp" target="_blank" rel="noopener noreferrer">https://github.com/warpdotdev/Warp<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>Warp 号称自己“Reinvent the Terminal”，也就是重新定义了终端，用过 vscode 的小伙伴是不是对这句口号似曾相识？</p><p>是的，vscode 号称自己“Code editing Redefined”，也就是重新定义了代码编辑器。</p><h3 id="一、安装-warp" tabindex="-1"><a class="header-anchor" href="#一、安装-warp" aria-hidden="true">#</a> 一、安装 Warp</h3><p>直接到官网 <code>warp.dev</code> 点击「download now」就可以下载最新版了。下载完成后，双击安装包就可以安装了。完成后打开，界面还是非常清爽的。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-188834c7-70b7-4f9c-a817-b4a691625fd1.png" alt=""></p><p>Warp 支持 GitHub 账户登录。不过，如果你在登录的过程中因为某些原因无法完成跳转，可以通过下面的链接自行解决。</p><blockquote><p><a href="https://embiid.blog/post/WARP-does-not-work-after-submitting-an-invite-code/" target="_blank" rel="noopener noreferrer">https://embiid.blog/post/WARP-does-not-work-after-submitting-an-invite-code/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>如果顺利登录，会跳转到这个页面。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-84c0b513-57f3-4ab4-8c77-508c10c923c5.png" alt=""></p><p>填写一些 Warp 的调查信息后，就会跳转到 Warp 的初始界面。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-304639e9-7554-45b4-a199-e7c0c3b40c33.png" alt=""></p><blockquote><p>需要注意的是，Warp 目前仅支持 macOS 版，Linux 和 Windows 用户还需要等待一段时间。</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-a4d43a50-0ad9-4f91-ad4e-c1c0788bb580.png" alt=""></p><p>其实 macOS 版也是刚刚公测，我这份攻略绝壁是热乎乎的。想要第一时间关注 Warp 版本信息的话，可以戳下图中提到的链接填写自己的邮箱。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-f622d505-b136-4b9d-95c5-a6872e1423e1.png" alt=""></p><h3 id="二、使用-warp" tabindex="-1"><a class="header-anchor" href="#二、使用-warp" aria-hidden="true">#</a> 二、使用 Warp</h3><p>Warp 解决的第一个痛点，就是减少配置、方便输入、优化输出，并且增加常用命令的自动提示。</p><p><strong>1）智能提示</strong></p><p>普通的终端在你键入 tab 的时候，是这样提示的，就是简单地帮你罗列下。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-078017c6-a872-466a-8aa2-f202c9371493.png" alt=""></p><p>而 Warp 就非常的时髦，会给你滚动可选的列表形式展示出来。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-4e205289-d8c4-49a9-90ba-08aef8beb627.png" alt=""></p><p>Warp 的智能提示也更加“智能化”，它会猜测你下一步的命令到底输入什么。</p><p>比如说我的工作目录下有一个 README.md 的文件，那当我输入 <code>echo &#39;沉默王二&#39; &gt;&gt;</code>的时候它会把 <code>README.md</code> 提示在后面。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-8948ab59-3ce8-4b04-80a5-ecd7663e1034.png" alt=""></p><p><strong>2）智能记忆</strong></p><p>Warp 会记录上一次执行的命令，在顶部会有一个提示的按钮，当你点击的时候，它会自动滚动到上一个命令执行的位置。</p><p>点击「clear」之前。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-6055bfaa-a146-4cf8-a6f4-aa493dbfa60b.png" alt=""></p><p>点击「clear」之后。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-181dff97-bd6f-4c41-94c8-8e9ac5567460.png" alt=""></p><p><strong>3）区域选择</strong></p><p>传统的终端，在复制区域命令和输出结果的时候需要全部手动选择，而 Warp 是可以点选的，之后可以通过右键菜单进行复制粘贴（可以选择只复制命令或者输出，也可以都选），非常方便。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-23c0a936-2371-4cf4-acf1-555bceecac44.png" alt=""></p><p><strong>4）历史命令</strong></p><p>传统的终端在通过 up-down 键选择历史命令的时候，一次只能提示一个命令。而 Warp 会把历史命令做成一个滚动的可以选择的列表。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-da43dca3-d8d1-43ad-9308-f8ec1c2b871b.png" alt=""></p><p><strong>5）命令导航</strong></p><p>同时按下 Ctrl+Shift+R 可以打开命令导航，Warp 集成了很多工具的命令导航。比如说我们要执行 <code>git reset</code> 命令，那么到底格式什么，应该怎么执行，Warp 都提示的非常到位。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-b9a4fd3f-24b2-4f6a-8a70-58fa1b313df3.png" alt=""></p><p>这让我想起了 macOS 的效率工具 Alfred，可以搜索任何你想要的命令。</p><p><strong>6）AI 植入</strong></p><p>Warp 还提供了 AI 智能搜索，快捷键可以在 setting→keyboard shortcuts 中找得到，键入 AI 关键字即可。</p><p>可调整为自己喜欢的快捷键。我目前设置的是 <code>Ctrl+shift+&gt;</code>。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-04300bc5-5d0d-494b-955c-1d270133227a.png" alt=""></p><p>比如说我问它“how many lines were changed in the last 2 commits?”</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-871e51e9-c2ac-4ecb-bfcb-ff339f05bd61.png" alt=""></p><p>Warp 解决的第二个痛点是增加协作功能。不过由于我目前没有邀请其他用户参与，还无法使用共享功能，后面有小伙伴体验的话，可以通过我分享的链接下载试一波。</p><blockquote><p>https://app.warp.dev/referral/25KR3Y</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-d8952a84-a0a7-4c3d-b237-87cdc997bb4c.png" alt=""></p><h3 id="三、配置-warp" tabindex="-1"><a class="header-anchor" href="#三、配置-warp" aria-hidden="true">#</a> 三、配置 Warp</h3><p>输入 Command+P 快捷键可以打开 Warp 的命令面板。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-369d16f6-f897-4c9f-bbea-631d561e145b.png" alt=""></p><p>键入 <code>sett</code> 关键字就可以打开配置页。</p><p>比如说在「Appearance」选项卡里可以设置 Warp 的主题、字体，以及紧凑型模式。</p><p>大概有十多种主题可选，比如说这个女生非常喜欢的粉色系。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-6b5dbf4c-7bb0-4926-b9e9-b64333cc2ed8.png" alt=""></p><p>更多主题可以到 GitHub 仓库的 theme 页。</p><blockquote><p><a href="https://github.com/warpdotdev/themes" target="_blank" rel="noopener noreferrer">https://github.com/warpdotdev/themes<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>至于快捷键配置，如果不确定有哪些快捷键可以尝试，直接点击 Warp 顶部的这个温馨提示「welcome tips」就可以了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-aa785da8-bb39-4851-97f5-b7f8baaccf34.png" alt=""></p><h3 id="四、总结" tabindex="-1"><a class="header-anchor" href="#四、总结" aria-hidden="true">#</a> 四、总结</h3><p>最后总结一波吧。</p><p>这波着实属于尝鲜了，市面上应该还木有 Warp 终端的普及安利文章，我这期应该属于大姑娘坐花轿———头一回。</p><p>害，登录折腾了好久，原因我就不多说了，小伙伴们自行体会哈。反正我是没被劝退。</p><p>幸好是没放弃，所以才体验到了 Warp 的强大之处，真的是改变了我对终端 terminal 的认知——太特喵的炫酷了！</p><p>这个过程就有点陶渊明《桃花源记》里那句“初极狭，复行数十步，豁然开朗”的赶脚。</p><p>喜欢的小伙伴一定要尝试一把，你会来感谢我的。好了，这期就先聊到这吧，毕竟 Warp 刚公测，后面有机会再来给大家详细地说。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/gongju/warp.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 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class="sidebar-heading clickable"><!----><span class="title">3.8 消息队列</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Warp：一款21世纪人用的终端工具</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 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277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年4月13日</span><meta property="datePublished" content="2022-04-13T08:53:39.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 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viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag1" role>辅助工具/轮子</li></ul><meta property="keywords" content="辅助工具/轮子"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 6 分钟</span><meta property="timeRequired" content="PT6M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/warp.html#一、安装-warp" class="router-link-active router-link-exact-active toc-link level3">一、安装 Warp</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/warp.html#二、使用-warp" class="router-link-active router-link-exact-active toc-link level3">二、使用 Warp</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/warp.html#三、配置-warp" class="router-link-active router-link-exact-active toc-link level3">三、配置 Warp</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/gongju/warp.html#四、总结" class="router-link-active router-link-exact-active toc-link level3">四、总结</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><p>程序员的一生，用的最多的两个工具，一个是代码编辑器（Code Editor），另外一个就是命令行终端工具（Terminal）。这两个工具对于提高开发效率至关重要。</p><p>代码编辑器在过去的 40 年里不断进化，从我上大学敲 Java 代码开始，就经历了 MyEclipse、NetBeans、Eclipse，到如今称王称霸的 Intellij IDEA。</p><p>但终端工具，基本上和上个世纪七八十年代差不多。</p><p>那本期给大家推荐的这款终端——Warp——绝对会让你大开眼界，用完爱不释手！</p><blockquote><p>还记得之前给大家推荐的 <a href="https://mp.weixin.qq.com/s/HeUAPe4LqqjfzIeWDe8KIg" target="_blank" rel="noopener noreferrer">Tabby<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a> 吗？是时候喜新厌旧了。</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-e0411889-e506-480f-a719-eba4f2d229b4.png" alt=""></p><p>Warp，一个超级牛叉的 terminal，号称是 21 世纪的终端，还未正式发布，就获得了两千三百万美元的融资。</p><blockquote><p>官方网站：<a href="https://www.warp.dev/" target="_blank" rel="noopener noreferrer">https://www.warp.dev/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>Warp 在 GitHub 上也已经开源，目前已经有 2.8k+ 的 star 了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-17a2270c-3bd1-47eb-a205-b7defde42895.png" alt=""></p><blockquote><p>GitHub 地址：<a href="https://github.com/warpdotdev/Warp" target="_blank" rel="noopener noreferrer">https://github.com/warpdotdev/Warp<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>Warp 号称自己“Reinvent the Terminal”，也就是重新定义了终端，用过 vscode 的小伙伴是不是对这句口号似曾相识？</p><p>是的，vscode 号称自己“Code editing Redefined”，也就是重新定义了代码编辑器。</p><h3 id="一、安装-warp" tabindex="-1"><a class="header-anchor" href="#一、安装-warp" aria-hidden="true">#</a> 一、安装 Warp</h3><p>直接到官网 <code>warp.dev</code> 点击「download now」就可以下载最新版了。下载完成后，双击安装包就可以安装了。完成后打开，界面还是非常清爽的。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-188834c7-70b7-4f9c-a817-b4a691625fd1.png" alt=""></p><p>Warp 支持 GitHub 账户登录。不过，如果你在登录的过程中因为某些原因无法完成跳转，可以通过下面的链接自行解决。</p><blockquote><p><a href="https://embiid.blog/post/WARP-does-not-work-after-submitting-an-invite-code/" target="_blank" rel="noopener noreferrer">https://embiid.blog/post/WARP-does-not-work-after-submitting-an-invite-code/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>如果顺利登录，会跳转到这个页面。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-84c0b513-57f3-4ab4-8c77-508c10c923c5.png" alt=""></p><p>填写一些 Warp 的调查信息后，就会跳转到 Warp 的初始界面。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-304639e9-7554-45b4-a199-e7c0c3b40c33.png" alt=""></p><blockquote><p>需要注意的是，Warp 目前仅支持 macOS 版，Linux 和 Windows 用户还需要等待一段时间。</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-a4d43a50-0ad9-4f91-ad4e-c1c0788bb580.png" alt=""></p><p>其实 macOS 版也是刚刚公测，我这份攻略绝壁是热乎乎的。想要第一时间关注 Warp 版本信息的话，可以戳下图中提到的链接填写自己的邮箱。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-f622d505-b136-4b9d-95c5-a6872e1423e1.png" alt=""></p><h3 id="二、使用-warp" tabindex="-1"><a class="header-anchor" href="#二、使用-warp" aria-hidden="true">#</a> 二、使用 Warp</h3><p>Warp 解决的第一个痛点，就是减少配置、方便输入、优化输出，并且增加常用命令的自动提示。</p><p><strong>1）智能提示</strong></p><p>普通的终端在你键入 tab 的时候，是这样提示的，就是简单地帮你罗列下。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-078017c6-a872-466a-8aa2-f202c9371493.png" alt=""></p><p>而 Warp 就非常的时髦，会给你滚动可选的列表形式展示出来。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-4e205289-d8c4-49a9-90ba-08aef8beb627.png" alt=""></p><p>Warp 的智能提示也更加“智能化”，它会猜测你下一步的命令到底输入什么。</p><p>比如说我的工作目录下有一个 README.md 的文件，那当我输入 <code>echo &#39;沉默王二&#39; &gt;&gt;</code>的时候它会把 <code>README.md</code> 提示在后面。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-8948ab59-3ce8-4b04-80a5-ecd7663e1034.png" alt=""></p><p><strong>2）智能记忆</strong></p><p>Warp 会记录上一次执行的命令，在顶部会有一个提示的按钮，当你点击的时候，它会自动滚动到上一个命令执行的位置。</p><p>点击「clear」之前。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-6055bfaa-a146-4cf8-a6f4-aa493dbfa60b.png" alt=""></p><p>点击「clear」之后。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-181dff97-bd6f-4c41-94c8-8e9ac5567460.png" alt=""></p><p><strong>3）区域选择</strong></p><p>传统的终端，在复制区域命令和输出结果的时候需要全部手动选择，而 Warp 是可以点选的，之后可以通过右键菜单进行复制粘贴（可以选择只复制命令或者输出，也可以都选），非常方便。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-23c0a936-2371-4cf4-acf1-555bceecac44.png" alt=""></p><p><strong>4）历史命令</strong></p><p>传统的终端在通过 up-down 键选择历史命令的时候，一次只能提示一个命令。而 Warp 会把历史命令做成一个滚动的可以选择的列表。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-da43dca3-d8d1-43ad-9308-f8ec1c2b871b.png" alt=""></p><p><strong>5）命令导航</strong></p><p>同时按下 Ctrl+Shift+R 可以打开命令导航，Warp 集成了很多工具的命令导航。比如说我们要执行 <code>git reset</code> 命令，那么到底格式什么，应该怎么执行，Warp 都提示的非常到位。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-b9a4fd3f-24b2-4f6a-8a70-58fa1b313df3.png" alt=""></p><p>这让我想起了 macOS 的效率工具 Alfred，可以搜索任何你想要的命令。</p><p><strong>6）AI 植入</strong></p><p>Warp 还提供了 AI 智能搜索，快捷键可以在 setting→keyboard shortcuts 中找得到，键入 AI 关键字即可。</p><p>可调整为自己喜欢的快捷键。我目前设置的是 <code>Ctrl+shift+&gt;</code>。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-04300bc5-5d0d-494b-955c-1d270133227a.png" alt=""></p><p>比如说我问它“how many lines were changed in the last 2 commits?”</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-871e51e9-c2ac-4ecb-bfcb-ff339f05bd61.png" alt=""></p><p>Warp 解决的第二个痛点是增加协作功能。不过由于我目前没有邀请其他用户参与，还无法使用共享功能，后面有小伙伴体验的话，可以通过我分享的链接下载试一波。</p><blockquote><p>https://app.warp.dev/referral/25KR3Y</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-d8952a84-a0a7-4c3d-b237-87cdc997bb4c.png" alt=""></p><h3 id="三、配置-warp" tabindex="-1"><a class="header-anchor" href="#三、配置-warp" aria-hidden="true">#</a> 三、配置 Warp</h3><p>输入 Command+P 快捷键可以打开 Warp 的命令面板。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-369d16f6-f897-4c9f-bbea-631d561e145b.png" alt=""></p><p>键入 <code>sett</code> 关键字就可以打开配置页。</p><p>比如说在「Appearance」选项卡里可以设置 Warp 的主题、字体，以及紧凑型模式。</p><p>大概有十多种主题可选，比如说这个女生非常喜欢的粉色系。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-6b5dbf4c-7bb0-4926-b9e9-b64333cc2ed8.png" alt=""></p><p>更多主题可以到 GitHub 仓库的 theme 页。</p><blockquote><p><a href="https://github.com/warpdotdev/themes" target="_blank" rel="noopener noreferrer">https://github.com/warpdotdev/themes<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>至于快捷键配置，如果不确定有哪些快捷键可以尝试，直接点击 Warp 顶部的这个温馨提示「welcome tips」就可以了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongju/warp-aa785da8-bb39-4851-97f5-b7f8baaccf34.png" alt=""></p><h3 id="四、总结" tabindex="-1"><a class="header-anchor" href="#四、总结" aria-hidden="true">#</a> 四、总结</h3><p>最后总结一波吧。</p><p>这波着实属于尝鲜了，市面上应该还木有 Warp 终端的普及安利文章，我这期应该属于大姑娘坐花轿———头一回。</p><p>害，登录折腾了好久，原因我就不多说了，小伙伴们自行体会哈。反正我是没被劝退。</p><p>幸好是没放弃，所以才体验到了 Warp 的强大之处，真的是改变了我对终端 terminal 的认知——太特喵的炫酷了！</p><p>这个过程就有点陶渊明《桃花源记》里那句“初极狭，复行数十步，豁然开朗”的赶脚。</p><p>喜欢的小伙伴一定要尝试一把，你会来感谢我的。好了，这期就先聊到这吧，毕竟 Warp 刚公测，后面有机会再来给大家详细地说。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/gongju/warp.md" 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class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java程序员进阶之路x沉默王二</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="true" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener 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01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月14日</span><meta property="datePublished" content="2022-03-14T13:52:47.000Z"></span><!----><!----><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="true" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 16 分钟</span><meta property="timeRequired" content="PT16M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/home.html#为什么会有这个开源知识库" class="router-link-active router-link-exact-active toc-link level2">为什么会有这个开源知识库</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/home.html#知识库地图" class="router-link-active router-link-exact-active toc-link level2">知识库地图</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" 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程序员进阶之路》官方知识星球来啦！！！</a>如果你需要专属Java学习/面试小册/一对一交流/简历修改/专属求职指南/学习打卡，不妨花 3 分钟左右看看星球的详细介绍： <a href="https://tobebetterjavaer.com/zhishixingqiu/">《Java 程序员进阶之路》详细介绍 </a>（一定要确定自己真的需要再加入，一定要看完详细介绍之后再加我）。</p><div style="text-align:center;"><p align="center"><a href="https://tobebetterjavaer.com"><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/logo-01.png" width="260px" alt="Java 程序员进阶之路"></a></p><p align="center"><a href="https://github.com/itwanger/toBeBetterJavaer" target="_blank"><img src="https://img.shields.io/badge/Github-toBeBetterJavaer-red.svg"></a><a href="https://gitee.com/itwanger/toBeBetterJavaer" target="_blank"><img src="https://img.shields.io/badge/Gitee-toBeBetterJavaer-blue.svg"></a><a href="https://space.bilibili.com/513340480" target="_blank"><img src="https://img.shields.io/badge/bilibili-哔哩哔哩-critical"></a><a href="https://mp.weixin.qq.com/s/ExjM-xdqMFFY1NIZffz-Ng" target="_blank"><img src="https://img.shields.io/badge/计算机经典电子书-下载-green.svg" alt="无套路下载"></a></p></div><h2 id="为什么会有这个开源知识库" tabindex="-1"><a class="header-anchor" href="#为什么会有这个开源知识库" aria-hidden="true">#</a> 为什么会有这个开源知识库</h2><p>知识库取名 <strong>toBeBetterJavaer</strong>，即 <strong>To Be Better Javaer</strong>，意为「成为一名更好的 Java 程序员」，是自学 Java 以来所有原创文章和学习资料的大聚合。内容包括 Java 基础、Java 并发编程、Java 虚拟机、Java 企业级开发、Java 面试等核心知识点。据说每一个优秀的 Java 程序员都喜欢她，风趣幽默、通俗易懂。学 Java，就认准 Java 程序员进阶之路😄。</p><p>知识库旨在为学习 Java 的小伙伴提供一系列：</p><ul><li><strong>优质的原创 Java 教程</strong></li><li><strong>全面清晰的 Java 学习路线</strong></li><li><strong>免费但靠谱的 Java 学习资料</strong></li><li><strong>精选的 Java 岗求职面试指南</strong></li><li><strong>Java 企业级开发所需的必备技术</strong></li></ul><p>赠人玫瑰手有余香。知识库会持续保持<strong>更新</strong>，欢迎收藏品鉴！</p><p><strong>转载须知</strong> ：以下所有文章如非文首说明为转载皆为我（沉默王二）的原创，转载在文首注明出处，如发现恶意抄袭/搬运，会动用法律武器维护自己的权益。让我们一起维护一个良好的技术创作环境！</p><p>推荐你通过在线阅读网站进行阅读，体验更好，速度更快！</p><ul><li><a href="https://tobebetterjavaer.com/" target="_blank" rel="noopener noreferrer">Java 程序员进阶之路在线阅读网站（VuePress 版）<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://docsify.tobebetterjavaer.com/" target="_blank" rel="noopener noreferrer">Java 程序员进阶之路在线阅读网站（docsify 版）<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" 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window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/vnMZY9Gsy3o1FwMi4f1GlA" target="_blank" rel="noopener noreferrer">双非学历的社畜，历经 6 轮面试，最终拿下阿里Offer<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul><h3 id="面试准备" tabindex="-1"><a class="header-anchor" href="#面试准备" aria-hidden="true">#</a> 面试准备</h3><ul><li><a href="https://mp.weixin.qq.com/s/qurUqeD_VyiJRtB38vOuSw" target="_blank" rel="noopener noreferrer">简历如何优化，简历如何投递，面试如何准备？<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/rO7cU4NX74CoWADo_O4IUw" target="_blank" rel="noopener noreferrer">校招时间节点、简历编写、笔试、、HR面、实习等注意事项<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul><h3 id="城市选择" tabindex="-1"><a class="header-anchor" href="#城市选择" aria-hidden="true">#</a> 城市选择</h3><ul><li><a href="/cityselect/beijing.html" class="">北京都有哪些牛逼的互联网公司？</a></li><li><a href="/cityselect/guangzhou.html" class="">想去广州了！</a></li><li><a href="/cityselect/shenzhen.html" class="">深圳有哪些牛批的互联网公司？</a></li><li><a href="/cityselect/xian.html" class="">西安有哪些不错的互联网公司？</a></li><li><a href="/cityselect/qingdao.html" class="">青岛有牛逼的互联网公司吗？</a></li><li><a href="/cityselect/zhengzhou.html" class="">郑州有哪些不错的互联网公司？</a></li><li><a href="/cityselect/suzhou.html" class="">想搬去苏州生活了。。。</a></li><li><a href="/cityselect/nanjing.html" class="">南京有哪些靠谱的互联网公司？</a></li><li><a href="/cityselect/hangzhou.html" class="">杭州有哪些顶级的互联网公司？</a></li><li><a href="/cityselect/chengdu.html" class="">成都有哪些牛批的互联网公司？</a></li></ul><h3 id="工作体会" tabindex="-1"><a class="header-anchor" href="#工作体会" aria-hidden="true">#</a> 工作体会</h3><h2 id="学习资源" tabindex="-1"><a class="header-anchor" href="#学习资源" aria-hidden="true">#</a> 学习资源</h2><ul><li><strong>不知道学什么？不知道该怎么学？找不到优质的学习资源</strong>？这些问题在这里统统都可以找到答案。</li><li>我会把自己十多年的编程经验和学习资源毫不保留的分享出来。</li></ul><h3 id="pdf下载" tabindex="-1"><a class="header-anchor" href="#pdf下载" aria-hidden="true">#</a> PDF下载</h3><ul><li><a href="/download/java.html" class="">👏下载→Java程序员常读书单</a></li><li><a href="https://mp.weixin.qq.com/s/US5nTxbC2nYc1hWpn5Bozw" target="_blank" rel="noopener noreferrer">👏下载→最全最硬核的Java面试 “备战” 资料<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/pxKrjw_5NTdZfHOKCkwn8w" target="_blank" rel="noopener noreferrer">👏下载→深入浅出Java多线程<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/d7Z0QoChNuP9bTwAGh2QCw" target="_blank" rel="noopener noreferrer">👏下载→GitHub星标115k+的Java教程<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/PH5AizUAnTz0CuvJclpAKw" target="_blank" rel="noopener noreferrer">👏下载→重学Java设计模式<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/PH5AizUAnTz0CuvJclpAKw" target="_blank" rel="noopener noreferrer">👏下载→重学Java设计模式<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/FyoOPIMGcaeH0z5RMhxtaQ" target="_blank" rel="noopener noreferrer">👏下载→Java版LeetCode刷题笔记<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="/download/yuanyifeng-c-language.html" class="">👏下载→阮一峰C语言入门教程</a></li><li><a href="/download/bat-shuati.html" class="">👏下载→BAT大佬的刷题笔记</a></li><li><a href="https://mp.weixin.qq.com/s/puTGbgU7xQnRcvz5hxGBHA" target="_blank" rel="noopener noreferrer">👏下载→给操作系统捋条线<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="/download/progit.html" class="">👏下载→豆瓣9.1分，Pro Git中文版</a></li><li><a href="/download/jianli.html" class="">👏下载→简历模板</a></li></ul><h2 id="知识库搭建" tabindex="-1"><a class="header-anchor" href="#知识库搭建" aria-hidden="true">#</a> 知识库搭建</h2><p>从购买阿里云服务器+域名购买+域名备案+HTTP 升级到 HTTPS，全方面记录《Java 程序员进阶之路》知识库的诞生和改进过程，涉及到 docsify、Git、Linux 命令、GitHub 仓库等实用知识点。</p><ul><li><a href="/szjy/buy-cloud-server.html" class="">购买云服务器</a></li><li><a href="/szjy/install-baota-mianban.html" class="">安装宝塔面板</a></li><li><a href="/szjy/buy-domain.html" class="">购买域名&amp;域名解析</a></li><li><a href="/szjy/record-domain.html" class="">备案域名</a></li><li><a href="/szjy/https-domain.html" class="">给域名配置HTTPS证书</a></li><li><a href="/szjy/tobebetterjavaer-wangzhan-shangxian.html" class="">使用docsify+Git+GitHub+码云+阿里云服务器搭建知识库网站</a></li></ul><h2 id="联系作者" tabindex="-1"><a class="header-anchor" href="#联系作者" aria-hidden="true">#</a> 联系作者</h2><ul><li>作者是一名普通普通普通普通三连的 Java 后端开发者，热爱学习，热爱分享</li><li>参加工作以后越来越理解交流和分享的重要性，在不停地汲取营养的同时，也希望帮助到更多的小伙伴们</li><li>Java 程序员进阶之路，不仅是作者自学 Java 以来所有的原创文章和学习资料的大聚合，更是作者向这个世界传播知识的一个窗口。</li></ul><h3 id="心路历程" tabindex="-1"><a class="header-anchor" href="#心路历程" aria-hidden="true">#</a> 心路历程</h3><ul><li><a href="/about-the-author/" class="">走近作者：个人介绍 Q&amp;A</a></li><li><a href="/about-the-author/bzhan-10wan.html" class="">我的第一个，10 万(B站视频播放)</a></li><li><a href="/about-the-author/zhihu-1000wan.html" 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clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java程序员进阶之路x沉默王二</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="true" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 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18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月14日</span><meta property="datePublished" content="2022-03-14T13:52:47.000Z"></span><!----><!----><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="true" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 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src="https://img.shields.io/badge/bilibili-哔哩哔哩-critical"></a><a href="https://mp.weixin.qq.com/s/ExjM-xdqMFFY1NIZffz-Ng" target="_blank"><img src="https://img.shields.io/badge/计算机经典电子书-下载-green.svg" alt="无套路下载"></a></p></div><h2 id="为什么会有这个开源知识库" tabindex="-1"><a class="header-anchor" href="#为什么会有这个开源知识库" aria-hidden="true">#</a> 为什么会有这个开源知识库</h2><p>知识库取名 <strong>toBeBetterJavaer</strong>，即 <strong>To Be Better Javaer</strong>，意为「成为一名更好的 Java 程序员」，是自学 Java 以来所有原创文章和学习资料的大聚合。内容包括 Java 基础、Java 并发编程、Java 虚拟机、Java 企业级开发、Java 面试等核心知识点。据说每一个优秀的 Java 程序员都喜欢她，风趣幽默、通俗易懂。学 Java，就认准 Java 程序员进阶之路😄。</p><p>知识库旨在为学习 Java 的小伙伴提供一系列：</p><ul><li><strong>优质的原创 Java 教程</strong></li><li><strong>全面清晰的 Java 学习路线</strong></li><li><strong>免费但靠谱的 Java 学习资料</strong></li><li><strong>精选的 Java 岗求职面试指南</strong></li><li><strong>Java 企业级开发所需的必备技术</strong></li></ul><p>赠人玫瑰手有余香。知识库会持续保持<strong>更新</strong>，欢迎收藏品鉴！</p><p><strong>转载须知</strong> ：以下所有文章如非文首说明为转载皆为我（沉默王二）的原创，转载在文首注明出处，如发现恶意抄袭/搬运，会动用法律武器维护自己的权益。让我们一起维护一个良好的技术创作环境！</p><p>推荐你通过在线阅读网站进行阅读，体验更好，速度更快！</p><ul><li><a href="https://tobebetterjavaer.com/" target="_blank" rel="noopener noreferrer">Java 程序员进阶之路在线阅读网站<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://github.com/itwanger/toBeBetterJavaer" target="_blank" rel="noopener noreferrer">Java 程序员进阶之路 GitHub 仓库<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://gitee.com/itwanger/toBeBetterJavaer" target="_blank" rel="noopener noreferrer">Java 程序员进阶之路 Gitee 仓库<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul><p>亿点点小请求，建议戳<a href="https://github.com/itwanger/toBeBetterJavaer" target="_blank" rel="noopener noreferrer">这个链接🔗<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>给本仓库点个 star，满足一下我的虚荣心，内容质量也绝对值得你一个 star。我还在继续创作，给我一点继续更新的动力，笔芯。</p><h2 id="知识库地图" tabindex="-1"><a class="header-anchor" href="#知识库地图" aria-hidden="true">#</a> 知识库地图</h2><p>知识库收录的核心内容就全在这里面了，大类分为 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d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/0hCJy0m8nHm08HfyXKQT1A" target="_blank" rel="noopener noreferrer">字节小姐姐的一份秋招攻略<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/6TYEDM73N68vKXpmLRKhHA" target="_blank" rel="noopener noreferrer">面试常见词汇扫盲+常见大厂面试特点分享<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/vnMZY9Gsy3o1FwMi4f1GlA" target="_blank" rel="noopener noreferrer">双非学历的社畜，历经 6 轮面试，最终拿下阿里Offer<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul><h3 id="面试准备" tabindex="-1"><a class="header-anchor" href="#面试准备" aria-hidden="true">#</a> 面试准备</h3><ul><li><a href="https://mp.weixin.qq.com/s/qurUqeD_VyiJRtB38vOuSw" target="_blank" rel="noopener noreferrer">简历如何优化，简历如何投递，面试如何准备？<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/rO7cU4NX74CoWADo_O4IUw" target="_blank" rel="noopener noreferrer">校招时间节点、简历编写、笔试、、HR面、实习等注意事项<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul><h3 id="城市选择" tabindex="-1"><a class="header-anchor" href="#城市选择" aria-hidden="true">#</a> 城市选择</h3><ul><li><a href="/cityselect/beijing.html" class="">北京都有哪些值得加入的IT互联网公司？</a></li><li><a href="/cityselect/guangzhou.html" class="">广州都有哪些值得加入的IT互联网公司？</a></li><li><a href="/cityselect/shenzhen.html" class="">深圳都有哪些值得加入的IT互联网公司？</a></li><li><a href="/cityselect/xian.html" class="">西安都有哪些值得加入的IT互联网公司？</a></li><li><a href="/cityselect/qingdao.html" class="">青岛都有哪些值得加入的IT互联网公司？</a></li><li><a href="/cityselect/zhengzhou.html" class="">郑州都有哪些值得加入的IT互联网公司？</a></li><li><a href="/cityselect/suzhou.html" class="">苏州都有哪些值得加入的IT互联网公司？</a></li><li><a href="/cityselect/nanjing.html" class="">南京都有哪些值得加入的IT互联网公司？</a></li><li><a href="/cityselect/hangzhou.html" class="">杭州都有哪些值得加入的IT互联网公司？</a></li><li><a href="/cityselect/chengdu.html" class="">成都都有哪些值得加入的IT互联网公司？</a></li><li><a href="/cityselect/jinan.html" class="">济南都有哪些值得加入的IT互联网公司？</a></li></ul><h3 id="工作体会" tabindex="-1"><a class="header-anchor" href="#工作体会" aria-hidden="true">#</a> 工作体会</h3><h2 id="学习资源" tabindex="-1"><a class="header-anchor" href="#学习资源" aria-hidden="true">#</a> 学习资源</h2><ul><li><strong>不知道学什么？不知道该怎么学？找不到优质的学习资源</strong>？这些问题在这里统统都可以找到答案。</li><li>我会把自己十多年的编程经验和学习资源毫不保留的分享出来。</li></ul><h3 id="pdf下载" tabindex="-1"><a class="header-anchor" href="#pdf下载" aria-hidden="true">#</a> PDF下载</h3><ul><li><a href="/download/java.html" class="">👏下载→Java程序员常读书单</a></li><li><a href="https://mp.weixin.qq.com/s/US5nTxbC2nYc1hWpn5Bozw" target="_blank" rel="noopener noreferrer">👏下载→最全最硬核的Java面试 “备战” 资料<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/pxKrjw_5NTdZfHOKCkwn8w" target="_blank" rel="noopener noreferrer">👏下载→深入浅出Java多线程<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/d7Z0QoChNuP9bTwAGh2QCw" target="_blank" rel="noopener noreferrer">👏下载→GitHub星标115k+的Java教程<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/PH5AizUAnTz0CuvJclpAKw" target="_blank" rel="noopener noreferrer">👏下载→重学Java设计模式<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/PH5AizUAnTz0CuvJclpAKw" target="_blank" rel="noopener noreferrer">👏下载→重学Java设计模式<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/FyoOPIMGcaeH0z5RMhxtaQ" target="_blank" rel="noopener noreferrer">👏下载→Java版LeetCode刷题笔记<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="/download/yuanyifeng-c-language.html" class="">👏下载→阮一峰C语言入门教程</a></li><li><a href="/download/bat-shuati.html" class="">👏下载→BAT大佬的刷题笔记</a></li><li><a href="https://mp.weixin.qq.com/s/puTGbgU7xQnRcvz5hxGBHA" target="_blank" rel="noopener noreferrer">👏下载→给操作系统捋条线<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="/download/progit.html" class="">👏下载→豆瓣9.1分，Pro Git中文版</a></li><li><a href="/download/jianli.html" class="">👏下载→简历模板</a></li></ul><h3 id="学习建议" tabindex="-1"><a class="header-anchor" href="#学习建议" aria-hidden="true">#</a> 学习建议</h3><p><strong>收集了我所有的知乎高赞帖子</strong>！全方位迷茫解惑。</p><ul><li><a href="/xuexijianyi/read-csapp.html" class="">如何阅读《深入理解计算机系统》这本书？</a></li><li><a href="/xuexijianyi/electron-information-engineering.html" class="">电子信息工程最好的出路的是什么？</a></li></ul><h2 id="知识库搭建" tabindex="-1"><a class="header-anchor" href="#知识库搭建" aria-hidden="true">#</a> 知识库搭建</h2><p>从购买阿里云服务器+域名购买+域名备案+HTTP 升级到 HTTPS，全方面记录《Java 程序员进阶之路》知识库的诞生和改进过程，涉及到 docsify、Git、Linux 命令、GitHub 仓库等实用知识点。</p><ul><li><a href="/szjy/buy-cloud-server.html" class="">购买云服务器</a></li><li><a href="/szjy/install-baota-mianban.html" class="">安装宝塔面板</a></li><li><a href="/szjy/buy-domain.html" class="">购买域名&amp;域名解析</a></li><li><a href="/szjy/record-domain.html" class="">备案域名</a></li><li><a href="/szjy/https-domain.html" class="">给域名配置HTTPS证书</a></li><li><a href="/szjy/tobebetterjavaer-wangzhan-shangxian.html" class="">使用docsify+Git+GitHub+码云+阿里云服务器搭建知识库网站</a></li></ul><h2 id="联系作者" tabindex="-1"><a class="header-anchor" href="#联系作者" aria-hidden="true">#</a> 联系作者</h2><ul><li>作者是一名普通普通普通普通三连的 Java 后端开发者，热爱学习，热爱分享</li><li>参加工作以后越来越理解交流和分享的重要性，在不停地汲取营养的同时，也希望帮助到更多的小伙伴们</li><li>Java 程序员进阶之路，不仅是作者自学 Java 以来所有的原创文章和学习资料的大聚合，更是作者向这个世界传播知识的一个窗口。</li></ul><h3 id="心路历程" tabindex="-1"><a class="header-anchor" href="#心路历程" aria-hidden="true">#</a> 心路历程</h3><ul><li><a href="/about-the-author/" class="">走近作者：个人介绍 Q&amp;A</a></li><li><a href="/about-the-author/bzhan-10wan.html" class="">我的第一个，10 万(B站视频播放)</a></li><li><a href="/about-the-author/zhihu-1000wan.html" class="">我的第一个，一千万！知乎阅读</a></li><li><a href="/about-the-author/csdn-1000wan.html" class="">我的第二个，一千万！CSDN阅读</a></li></ul></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/home.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 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href="/ide/4-debug-skill.html#异常断点" class="router-link-active router-link-exact-active toc-link level2">异常断点</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/ide/4-debug-skill.html#方法断点" class="router-link-active router-link-exact-active toc-link level2">方法断点</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/ide/4-debug-skill.html#总结" class="router-link-active router-link-exact-active toc-link level2">总结</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="_4个高级的intellij-idea调试技巧" tabindex="-1"><a class="header-anchor" href="#_4个高级的intellij-idea调试技巧" aria-hidden="true">#</a> 4个高级的IntelliJ IDEA调试技巧</h1><p>大家好，我是二哥！</p><p>今天给大家带来几个我日常工作以及阅读源码必备的 IntelliJ IDEA 高级调试技巧，分分钟要起飞的节奏。</p><h2 id="断点处添加-log" tabindex="-1"><a class="header-anchor" href="#断点处添加-log" aria-hidden="true">#</a> 断点处添加 log</h2><p>很多程序员在调试代码时都喜欢 <code>print</code> 一些内容，这样看起来更直观，print 完之后又很容易忘记删除掉这些没用的内容，最终将代码提交到 <code>remote</code>，code review 时又不得不删减这些内容重新提交，不但增加不必要的工作量，还让 <code>log tree</code> 的一些节点没有任何价值</p><p>IntelliJ IDEA 提供 <code>Evaluate and Log at Breakpoints</code> 功能恰巧可以帮助我们解决这个问题, 来看下面代码：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">void</span> <span class="token function">main</span><span class="token punctuation">(</span><span class="token class-name">String</span><span class="token punctuation">[</span><span class="token punctuation">]</span> args<span class="token punctuation">)</span> <span class="token punctuation">{</span>
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class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.7 分布式</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.8 消息队列</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->4个高级的IntelliJ IDEA调试技巧</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月17日</span><meta property="datePublished" content="2022-03-17T03:18:03.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 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aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 4 分钟</span><meta property="timeRequired" content="PT4M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/ide/4-debug-skill.html#断点处添加-log" class="router-link-active router-link-exact-active toc-link level2">断点处添加 log</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/ide/4-debug-skill.html#字段断点" class="router-link-active router-link-exact-active toc-link level2">字段断点</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/ide/4-debug-skill.html#异常断点" class="router-link-active router-link-exact-active toc-link level2">异常断点</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/ide/4-debug-skill.html#方法断点" class="router-link-active router-link-exact-active toc-link level2">方法断点</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/ide/4-debug-skill.html#总结" class="router-link-active router-link-exact-active toc-link level2">总结</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="_4个高级的intellij-idea调试技巧" tabindex="-1"><a class="header-anchor" href="#_4个高级的intellij-idea调试技巧" aria-hidden="true">#</a> 4个高级的IntelliJ IDEA调试技巧</h1><p>大家好，我是二哥！</p><p>今天给大家带来几个我日常工作以及阅读源码必备的 IntelliJ IDEA 高级调试技巧，分分钟要起飞的节奏。</p><h2 id="断点处添加-log" tabindex="-1"><a class="header-anchor" href="#断点处添加-log" aria-hidden="true">#</a> 断点处添加 log</h2><p>很多程序员在调试代码时都喜欢 <code>print</code> 一些内容，这样看起来更直观，print 完之后又很容易忘记删除掉这些没用的内容，最终将代码提交到 <code>remote</code>，code review 时又不得不删减这些内容重新提交，不但增加不必要的工作量，还让 <code>log tree</code> 的一些节点没有任何价值</p><p>IntelliJ IDEA 提供 <code>Evaluate and Log at Breakpoints</code> 功能恰巧可以帮助我们解决这个问题, 来看下面代码：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">void</span> <span class="token function">main</span><span class="token punctuation">(</span><span class="token class-name">String</span><span class="token punctuation">[</span><span class="token punctuation">]</span> args<span class="token punctuation">)</span> <span class="token punctuation">{</span>
   <span class="token class-name">ThreadLocalRandom</span> random <span class="token operator">=</span> <span class="token class-name">ThreadLocalRandom</span><span class="token punctuation">.</span><span class="token function">current</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
   <span class="token keyword">int</span> count <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span>
   <span class="token keyword">for</span> <span class="token punctuation">(</span><span class="token keyword">int</span> i <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span> i <span class="token operator">&lt;</span> <span class="token number">5</span><span class="token punctuation">;</span> i<span class="token operator">++</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
@@ -77,6 +77,6 @@ Disconnected from the target VM, address: &#39;127.0.0.1:0&#39;, transport: &#39
 
 Process finished with exit code 
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>如果你想要更详细的信息，那就勾选上 <code>Stack trace</code> (大家自己查看运行结果吧)，有了这个功能，上面说的一些问题都不复存在了</p><h2 id="字段断点" tabindex="-1"><a class="header-anchor" href="#字段断点" aria-hidden="true">#</a> 字段断点</h2><p>如果你阅读源码，你一定会有个困扰，类中的某个字段的值到底是在哪里改变的，你要一点点追踪调用栈，逐步排查，稍不留神，就可能有遗漏</p><blockquote><p>我们可以在 IntelliJ IDEA 中为某个字段添加断点，当字段值有修改时，自动跳到相应方法位置</p></blockquote><p>使用起来很简单：</p><ol><li>在字段定义处鼠标左键添加断点（会出现「眼睛」的图标）</li><li>在「眼睛」图标上鼠标右键</li><li>在弹框中勾选上<code>Field access</code> 和<code>Field modification</code> 两个选项</li></ol><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/ide/4-debug-skill-72c23537-3f66-4283-b939-a265b7628a1a.gif" alt="image.gif"></p><p>如果修改字段值的方法比较多，也可以在 <code>Condition</code> 的地方定义断点进入条件, 有了这个功能的加成，相信你阅读源码会顺畅许多</p><h2 id="异常断点" tabindex="-1"><a class="header-anchor" href="#异常断点" aria-hidden="true">#</a> 异常断点</h2><p>除了阅读源码，一定是遇到了异常我们才开始调试代码，代码在抛出异常之后会自动停止，但是我们希望：</p><blockquote><p>代码停在抛出异常之前，方便我们查看当时的变量信息</p></blockquote><p>这时我们就用到了 <code>Exception Breakpoints</code>, 当抛出异常时，在 catch 的地方打上断点，可以通过下图的几个位置获取栈顶异常类型，比如这里的 <code>NumberFormatException</code></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/ide/4-debug-skill-c4c511af-b00d-458b-a4a1-97d1fe1e84b8.jpg" alt=""></p><p>知道异常类型后，就可以按照如下步骤添加异常断点了：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/ide/4-debug-skill-4c35cab7-83d2-45b4-8a27-ebeceb41ce08.jpg" alt=""></p><p>然后在弹框中选择 NumberFormatException</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/ide/4-debug-skill-a98e7885-1e84-4c38-8de1-ae04d3013176.gif" alt=""></p><p>重新以 Debug 模式运行程序：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/ide/4-debug-skill-498ad99d-a15d-4a4e-a01b-b0c11cf8f72e.gif" alt=""></p><p>程序「一路绿灯式」定位到抛出异常的位置，同时指出当时的变量信息，三个字：稳，准，狠，还有谁？</p><h2 id="方法断点" tabindex="-1"><a class="header-anchor" href="#方法断点" aria-hidden="true">#</a> 方法断点</h2><p>当阅读源码时，比如 Spring，一个接口的方法可能被多个子类实现，当运行时，需要查看调用栈逐步定位实现类，IDEA 同样支持在接口方法上添加断点（快捷键 <code>cmd+F8</code>/<code>ctrl+F8</code>）：</p><ol><li>鼠标左键在方法处点击断点（♦️形状）</li><li>断点上鼠标右键</li></ol><p>勾选上绿色框线上的内容，同样可以自定义跳转条件 Condition</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/ide/4-debug-skill-b81dc459-5a9c-4e0e-b24e-350943299eda.jpg" alt=""></p><p>当以 Debug 模式运行程序的时候，会自动进入实现类的方法（注意断点形状）：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/ide/4-debug-skill-edbc1de2-4dd6-49a3-9a6a-5948d19aabee.jpg" alt=""></p><p>看到这你应该想到常见的 Runnable 接口中的 run 方法了，同样是有作用的，大家可以自行去尝试了</p><h2 id="总结" tabindex="-1"><a class="header-anchor" href="#总结" aria-hidden="true">#</a> 总结</h2><p>相信有以上四种调试技巧的加成，无论是工作debug 还是私下阅读源码，都可以轻松驾驭了。最后，来看看 IDEA 支持的各种断点调试类型，如果你只知道红色小圆点，那咱在留言区好好说说吧</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/ide/4-debug-skill-92ad72da-4bf1-4bc4-b21d-78c33114dc96.jpg" alt=""></p><hr><blockquote><p>作者：tan日拱一兵，转载链接：<a href="https://mp.weixin.qq.com/s/KG0yzb_9XhhTSzjHr4DkIQ" target="_blank" rel="noopener noreferrer">https://mp.weixin.qq.com/s/KG0yzb_9XhhTSzjHr4DkIQ<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 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d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><h2 id="友情链接" tabindex="-1"><a class="header-anchor" href="#友情链接" aria-hidden="true">#</a> 友情链接</h2><ul><li><a href="https://github.com/acmenlt/dynamic-threadpool" target="_blank" rel="noopener noreferrer">Hippo4J<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 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感谢大家对我资金的赞赏，每隔一个月会统计一次。</p><table><thead><tr><th>时间</th><th>小伙伴</th><th>赞赏金额</th></tr></thead><tbody><tr><td>2022-06-07</td><td>*勇</td><td>1元</td></tr><tr><td>2022-06-03</td><td>*张</td><td>1元</td></tr><tr><td>2022-05-12</td><td>*烟</td><td>10元</td></tr><tr><td>2022-04-25</td><td>*思</td><td>5元</td></tr><tr><td>2022-04-20</td><td>w*n</td><td>1元</td></tr><tr><td>2022-04-12</td><td>*生</td><td>10元</td></tr><tr><td>2022-03-04</td><td>袁*波</td><td>99元</td></tr><tr><td>2022-02-17</td><td>*色</td><td>1元</td></tr><tr><td>2022-02-17</td><td>M*y</td><td>1元</td></tr><tr><td>2022-01-28</td><td>G*R</td><td>6.6元</td></tr><tr><td>2022-01-20</td><td>*光</td><td>50元</td></tr><tr><td>2022-01-14</td><td>*浩</td><td>1元</td></tr><tr><td>2022-01-01</td><td>马*谊</td><td>6.6元</td></tr><tr><td>2022-01-01</td><td>刚*好</td><td>3.6元</td></tr><tr><td>2021-12-20</td><td>t*1</td><td>5 元</td></tr><tr><td>2021-10-26</td><td>*鱼</td><td>28 元</td></tr><tr><td>2021-10-11</td><td>*人</td><td>28 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class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->如何给女朋友解释清楚BIO、NIO和AIO？</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 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aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 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aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 6 分钟</span><meta property="timeRequired" content="PT6M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="如何给女朋友解释清楚bio、nio和aio" tabindex="-1"><a class="header-anchor" href="#如何给女朋友解释清楚bio、nio和aio" aria-hidden="true">#</a> 如何给女朋友解释清楚BIO、NIO和AIO？</h1><p>周末午后，在家里面进行电话面试，我问了面试者几个关于 IO 的问题，其中包括什么是 BIO、NIO 和 AIO？三者有什么区别？具体如何使用等问题，但是面试者回答的并不是很满意。于是我在面试评价中写道：&quot;对 Java 的 IO 提醒理解不够深入&quot;。恰好被女朋友看到了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-1.jpg" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-2.jpg" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-3.gif" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-4.jpg" alt=""></p><p>Java IO</p><p>IO，常协作 I/O，是 Input/Output 的简称，即输入/输出。通常指数据在内部存储器（内存）和外部存储器（硬盘、优盘等）或其他周边设备之间的输入和输出。</p><p>输入/输出是信息处理系统（例如计算机）与外部世界（可能是人类或另一信息处理系统）之间的通信。</p><p>输入是系统接收的信号或数据，输出则是从其发送的信号或数据。</p><p>在 Java 中，提供了一系列 API，可以供开发者来读写外部数据或文件。我们称这些 API 为 Java IO。</p><p>IO 是 Java 中比较重要，且比较难的知识点，主要是因为随着 Java 的发展，目前有三种 IO 共存。分别是 BIO、NIO 和 AIO。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-5.jpg" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-6.gif" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-7.gif" alt=""></p><p>Java BIO</p><p>BIO 全称Block-IO 是一种<strong>同步且阻塞</strong>的通信模式。是一个比较传统的通信方式，模式简单，使用方便。但并发处理能力低，通信耗时，依赖网速。</p><p>Java NIO</p><p>Java NIO，全程 Non-Block IO ，是 Java SE 1.4 版以后，针对网络传输效能优化的新功能。是一种<strong>非阻塞同步</strong>的通信模式。</p><p>NIO 与原来的 I/O 有同样的作用和目的, 他们之间最重要的区别是数据打包和传输的方式。原来的 I/O 以流的方式处理数据，而 NIO 以块的方式处理数据。</p><p>面向流的 I/O 系统一次一个字节地处理数据。一个输入流产生一个字节的数据，一个输出流消费一个字节的数据。</p><p>面向块的 I/O 系统以块的形式处理数据。每一个操作都在一步中产生或者消费一个数据块。按块处理数据比按(流式的)字节处理数据要快得多。但是面向块的 I/O 缺少一些面向流的 I/O 所具有的优雅性和简单性。</p><p>Java AIO</p><p>Java AIO，全程 Asynchronous IO，是<strong>异步非阻塞</strong>的 IO。是一种非阻塞异步的通信模式。</p><p>在 NIO 的基础上引入了新的异步通道的概念，并提供了异步文件通道和异步套接字通道的实现。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-8.jpg" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-9.jpg" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-10.jpg" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-11.gif" alt=""></p><p>三种 IO 的区别</p><p>首先，我们站在宏观的角度，重新画一下重点：</p><p><strong>BIO （Blocking I/O）：同步阻塞 I/O 模式。</strong></p><p><strong>NIO （New I/O）：同步非阻塞模式。</strong></p><p><strong>AIO （Asynchronous I/O）：异步非阻塞 I/O 模型。</strong></p><p>同步阻塞模式：这种模式下，我们的工作模式是先来到厨房，开始烧水，并坐在水壶面前一直等着水烧开。</p><p>同步非阻塞模式：这种模式下，我们的工作模式是先来到厨房，开始烧水，但是我们不一直坐在水壶前面等，而是回到客厅看电视，然后每隔几分钟到厨房看一下水有没有烧开。</p><p>异步非阻塞 I/O 模型：这种模式下，我们的工作模式是先来到厨房，开始烧水，我们不一直坐在水壶前面等，也不隔一段时间去看一下，而是在客厅看电视，水壶上面有个开关，水烧开之后他会通知我。</p><p>阻塞 VS 非阻塞：人是否坐在水壶前面一直等。</p><p>同步 VS 异步：水壶是不是在水烧开之后主动通知人。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-12.gif" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-13.jpg" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-14.jpg" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-15.jpg" alt=""></p><p>适用场景</p><p>BIO 方式适用于连接数目比较小且固定的架构，这种方式对服务器资源要求比较高，并发局限于应用中，JDK1.4 以前的唯一选择，但程序直观简单易理解。</p><p>NIO 方式适用于连接数目多且连接比较短（轻操作）的架构，比如聊天服务器，并发局限于应用中，编程比较复杂，JDK1.4 开始支持。</p><p>AIO 方式适用于连接数目多且连接比较长（重操作）的架构，比如相册服务器，充分调用 OS 参与并发操作，编程比较复杂，JDK7 开始支持。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-16.gif" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-17.gif" alt=""></p><p>使用方式</p><p>使用 BIO 实现文件的读取和写入。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token comment">//Initializes The Object</span>
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class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->如何给女朋友解释清楚BIO、NIO和AIO？</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 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106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><meta property="articleSection" content="Java核心"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 6 分钟</span><meta property="timeRequired" content="PT6M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="如何给女朋友解释清楚bio、nio和aio" tabindex="-1"><a class="header-anchor" href="#如何给女朋友解释清楚bio、nio和aio" aria-hidden="true">#</a> 如何给女朋友解释清楚BIO、NIO和AIO？</h1><p>周末午后，在家里面进行电话面试，我问了面试者几个关于 IO 的问题，其中包括什么是 BIO、NIO 和 AIO？三者有什么区别？具体如何使用等问题，但是面试者回答的并不是很满意。于是我在面试评价中写道：&quot;对 Java 的 IO 提醒理解不够深入&quot;。恰好被女朋友看到了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-1.jpg" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-2.jpg" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-3.gif" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-4.jpg" alt=""></p><p>Java IO</p><p>IO，常协作 I/O，是 Input/Output 的简称，即输入/输出。通常指数据在内部存储器（内存）和外部存储器（硬盘、优盘等）或其他周边设备之间的输入和输出。</p><p>输入/输出是信息处理系统（例如计算机）与外部世界（可能是人类或另一信息处理系统）之间的通信。</p><p>输入是系统接收的信号或数据，输出则是从其发送的信号或数据。</p><p>在 Java 中，提供了一系列 API，可以供开发者来读写外部数据或文件。我们称这些 API 为 Java IO。</p><p>IO 是 Java 中比较重要，且比较难的知识点，主要是因为随着 Java 的发展，目前有三种 IO 共存。分别是 BIO、NIO 和 AIO。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-5.jpg" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-6.gif" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-7.gif" alt=""></p><p>Java BIO</p><p>BIO 全称Block-IO 是一种<strong>同步且阻塞</strong>的通信模式。是一个比较传统的通信方式，模式简单，使用方便。但并发处理能力低，通信耗时，依赖网速。</p><p>Java NIO</p><p>Java NIO，全程 Non-Block IO ，是 Java SE 1.4 版以后，针对网络传输效能优化的新功能。是一种<strong>非阻塞同步</strong>的通信模式。</p><p>NIO 与原来的 I/O 有同样的作用和目的, 他们之间最重要的区别是数据打包和传输的方式。原来的 I/O 以流的方式处理数据，而 NIO 以块的方式处理数据。</p><p>面向流的 I/O 系统一次一个字节地处理数据。一个输入流产生一个字节的数据，一个输出流消费一个字节的数据。</p><p>面向块的 I/O 系统以块的形式处理数据。每一个操作都在一步中产生或者消费一个数据块。按块处理数据比按(流式的)字节处理数据要快得多。但是面向块的 I/O 缺少一些面向流的 I/O 所具有的优雅性和简单性。</p><p>Java AIO</p><p>Java AIO，全程 Asynchronous IO，是<strong>异步非阻塞</strong>的 IO。是一种非阻塞异步的通信模式。</p><p>在 NIO 的基础上引入了新的异步通道的概念，并提供了异步文件通道和异步套接字通道的实现。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-8.jpg" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-9.jpg" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-10.jpg" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-11.gif" alt=""></p><p>三种 IO 的区别</p><p>首先，我们站在宏观的角度，重新画一下重点：</p><p><strong>BIO （Blocking I/O）：同步阻塞 I/O 模式。</strong></p><p><strong>NIO （New I/O）：同步非阻塞模式。</strong></p><p><strong>AIO （Asynchronous I/O）：异步非阻塞 I/O 模型。</strong></p><p>同步阻塞模式：这种模式下，我们的工作模式是先来到厨房，开始烧水，并坐在水壶面前一直等着水烧开。</p><p>同步非阻塞模式：这种模式下，我们的工作模式是先来到厨房，开始烧水，但是我们不一直坐在水壶前面等，而是回到客厅看电视，然后每隔几分钟到厨房看一下水有没有烧开。</p><p>异步非阻塞 I/O 模型：这种模式下，我们的工作模式是先来到厨房，开始烧水，我们不一直坐在水壶前面等，也不隔一段时间去看一下，而是在客厅看电视，水壶上面有个开关，水烧开之后他会通知我。</p><p>阻塞 VS 非阻塞：人是否坐在水壶前面一直等。</p><p>同步 VS 异步：水壶是不是在水烧开之后主动通知人。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-12.gif" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-13.jpg" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-14.jpg" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-15.jpg" alt=""></p><p>适用场景</p><p>BIO 方式适用于连接数目比较小且固定的架构，这种方式对服务器资源要求比较高，并发局限于应用中，JDK1.4 以前的唯一选择，但程序直观简单易理解。</p><p>NIO 方式适用于连接数目多且连接比较短（轻操作）的架构，比如聊天服务器，并发局限于应用中，编程比较复杂，JDK1.4 开始支持。</p><p>AIO 方式适用于连接数目多且连接比较长（重操作）的架构，比如相册服务器，充分调用 OS 参与并发操作，编程比较复杂，JDK7 开始支持。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-16.gif" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-17.gif" alt=""></p><p>使用方式</p><p>使用 BIO 实现文件的读取和写入。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token comment">//Initializes The Object</span>
 <span class="token class-name">User1</span> user <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">User1</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 user<span class="token punctuation">.</span><span class="token function">setName</span><span class="token punctuation">(</span><span class="token string">&quot;wanger&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 user<span class="token punctuation">.</span><span class="token function">setAge</span><span class="token punctuation">(</span><span class="token number">23</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
@@ -196,6 +196,6 @@ user<span class="token punctuation">.</span><span class="token function">setAge<
   <span class="token punctuation">}</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-18.gif" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-19.gif" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-20.gif" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-21.jpg" alt=""></p><p>滴滴滴，水开了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-22.jpg" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/BIONIOAIO-23.jpg" alt=""></p><blockquote><p>转载链接：<a href="https://mp.weixin.qq.com/s/QQxrr5yP8X9YdFqIwXDoQQ" target="_blank" rel="noopener noreferrer">https://mp.weixin.qq.com/s/QQxrr5yP8X9YdFqIwXDoQQ<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png"></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/io/BIONIOAIO.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 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class="title">2.4 字符串&amp;数组</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.5 集合框架（容器）</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">2.6 IO</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a aria-current="page" href="/io/shangtou.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="概览"><!---->概览<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/io/shangtou.html#_01、传输方式划分" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="01、传输方式划分"><!---->01、传输方式划分<!----></a><ul 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right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java IO学习整理</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 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router-link-exact-active toc-link level3">01、传输方式划分</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/io/shangtou.html#_02、操作对象划分" class="router-link-active router-link-exact-active toc-link level3">02、操作对象划分</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="java-io学习整理" tabindex="-1"><a class="header-anchor" href="#java-io学习整理" aria-hidden="true">#</a> Java IO学习整理</h1><p>“老王，Java IO 也太上头了吧？”新兵蛋子小二向头顶很凉快的老王抱怨道，“你瞧，我就按照传输方式对 IO 进行了一个简单的分类，就能搞出来这么多的玩意！”</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/shangtou-01.png" alt=""></p><p>好久没搞过 IO 了，老王看到这幅思维导图也是吃了一惊。想想也是，他当初学习 Java IO 的时候头也大，乌央乌央的一片，全是类，估计是所有 Java 包里面类最多的，一会是 Input 一会是 Output，一会是 Reader 一会是 Writer，真不知道 Java 的设计者是怎么想的。</p><p>看着肺都快要气炸的小二，老王深深地吸了一口气，耐心地对小二说：“主要是 Java 的设计者考虑得比较多吧，所以 IO 给人一种很乱的感觉，我来给你梳理一下。”</p><h3 id="_01、传输方式划分" tabindex="-1"><a class="header-anchor" href="#_01、传输方式划分" aria-hidden="true">#</a> 01、传输方式划分</h3><p>就按照你的那副思维导图来说吧。</p><p>传输方式有两种，字节和字符，那首先得搞明白字节和字符有什么区别，对吧？</p><p>字节（byte）是计算机中用来表示存储容量的一个计量单位，通常情况下，一个字节有 8 位（bit）。</p><p>字符（char）可以是计算机中使用的字母、数字、和符号，比如说 A 1 $ 这些。</p><p>通常来说，一个字母或者一个字符占用一个字节，一个汉字占用两个字节。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/shangtou-02.png" alt=""></p><p>具体还要看字符编码，比如说在 UTF-8 编码下，一个英文字母（不分大小写）为一个字节，一个中文汉字为三个字节；在 Unicode 编码中，一个英文字母为一个字节，一个中文汉字为两个字节。</p><p>PS：关于字符编码，可以看前面的章节：<a href="https://mp.weixin.qq.com/s/pNQjlXOivIgO3pbYc0GnpA" target="_blank" rel="noopener noreferrer">锟斤拷<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><p>明白了字节与字符的区别，再来看字节流和字符流就会轻松多了。</p><p>字节流用来处理二进制文件，比如说图片啊、MP3 啊、视频啊。</p><p>字符流用来处理文本文件，文本文件可以看作是一种特殊的二进制文件，只不过经过了编码，便于人们阅读。</p><p>换句话说就是，字节流可以处理一切文件，而字符流只能处理文本。</p><p>虽然 IO 类很多，但核心的就是 4 个抽象类：InputStream、OutputStream、Reader、Writer。</p><p>（<strong>抽象大法真好</strong>）</p><p>虽然 IO 类的方法也很多，但核心的也就 2 个：read 和 write。</p><p><strong>InputStream 类</strong></p><ul><li><code>int read()</code>：读取数据</li><li><code>int read(byte b[], int off, int len)</code>：从第 off 位置开始读，读取 len 长度的字节，然后放入数组 b 中</li><li><code>long skip(long n)</code>：跳过指定个数的字节</li><li><code>int available()</code>：返回可读的字节数</li><li><code>void close()</code>：关闭流，释放资源</li></ul><p><strong>OutputStream 类</strong></p><ul><li><code>void write(int b)</code>： 写入一个字节，虽然参数是一个 int 类型，但只有低 8 位才会写入，高 24 位会舍弃（这块后面再讲）</li><li><code>void write(byte b[], int off, int len)</code>： 将数组 b 中的从 off 位置开始，长度为 len 的字节写入</li><li><code>void flush()</code>： 强制刷新，将缓冲区的数据写入</li><li><code>void close()</code>：关闭流</li></ul><p><strong>Reader 类</strong></p><ul><li><code>int read()</code>：读取单个字符</li><li><code>int read(char cbuf[], int off, int len)</code>：从第 off 位置开始读，读取 len 长度的字符，然后放入数组 b 中</li><li><code>long skip(long n)</code>：跳过指定个数的字符</li><li><code>int ready()</code>：是否可以读了</li><li><code>void close()</code>：关闭流，释放资源</li></ul><p><strong>Writer 类</strong></p><ul><li><code>void write(int c)</code>： 写入一个字符</li><li><code>void write( char cbuf[], int off, int len)</code>： 将数组 cbuf 中的从 off 位置开始，长度为 len 的字符写入</li><li><code>void flush()</code>： 强制刷新，将缓冲区的数据写入</li><li><code>void close()</code>：关闭流</li></ul><p>理解了上面这些方法，基本上 IO 的灵魂也就全部掌握了。</p><h3 id="_02、操作对象划分" tabindex="-1"><a class="header-anchor" href="#_02、操作对象划分" aria-hidden="true">#</a> 02、操作对象划分</h3><p>小二，你细想一下，IO IO，不就是输入输出（Input/Output）嘛：</p><ul><li>Input：将外部的数据读入内存，比如说把文件从硬盘读取到内存，从网络读取数据到内存等等</li><li>Output：将内存中的数据写入到外部，比如说把数据从内存写入到文件，把数据从内存输出到网络等等。</li></ul><p>所有的程序，在执行的时候，都是在内存上进行的，一旦关机，内存中的数据就没了，那如果想要持久化，就需要把内存中的数据输出到外部，比如说文件。</p><p>文件操作算是 IO 中最典型的操作了，也是最频繁的操作。那其实你可以换个角度来思考，比如说按照 IO 的操作对象来思考，IO 就可以分类为：文件、数组、管道、基本数据类型、缓冲、打印、对象序列化/反序列化，以及转换等。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/shangtou-03.png" alt=""></p><p><strong>1）文件</strong></p><p>文件流也就是直接操作文件的流，可以细分为字节流（FileInputStream 和 FileOuputStream）和字符流（FileReader 和 FileWriter）。</p><p>FileInputStream 的例子：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">int</span> b<span class="token punctuation">;</span>
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class="sidebar-heading clickable active"><!----><span class="title">2.6 IO</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a aria-current="page" href="/io/shangtou.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="概览"><!---->概览<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/io/shangtou.html#_01、传输方式划分" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="01、传输方式划分"><!---->01、传输方式划分<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/io/shangtou.html#_02、操作对象划分" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="02、操作对象划分"><!---->02、操作对象划分<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/io/BIONIOAIO.html" class="nav-link sidebar-link sidebar-page" aria-label="BIO、NIO和AIO"><!---->BIO、NIO和AIO<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.11 并发编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java IO学习整理</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" 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18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><meta property="articleSection" content="Java核心"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 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213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 9 分钟</span><meta property="timeRequired" content="PT9M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/io/shangtou.html#_01、传输方式划分" class="router-link-active router-link-exact-active toc-link level3">01、传输方式划分</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/io/shangtou.html#_02、操作对象划分" class="router-link-active router-link-exact-active toc-link level3">02、操作对象划分</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="java-io学习整理" tabindex="-1"><a class="header-anchor" href="#java-io学习整理" aria-hidden="true">#</a> Java IO学习整理</h1><p>“老王，Java IO 也太上头了吧？”新兵蛋子小二向头顶很凉快的老王抱怨道，“你瞧，我就按照传输方式对 IO 进行了一个简单的分类，就能搞出来这么多的玩意！”</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/shangtou-01.png" alt=""></p><p>好久没搞过 IO 了，老王看到这幅思维导图也是吃了一惊。想想也是，他当初学习 Java IO 的时候头也大，乌央乌央的一片，全是类，估计是所有 Java 包里面类最多的，一会是 Input 一会是 Output，一会是 Reader 一会是 Writer，真不知道 Java 的设计者是怎么想的。</p><p>看着肺都快要气炸的小二，老王深深地吸了一口气，耐心地对小二说：“主要是 Java 的设计者考虑得比较多吧，所以 IO 给人一种很乱的感觉，我来给你梳理一下。”</p><h3 id="_01、传输方式划分" tabindex="-1"><a class="header-anchor" href="#_01、传输方式划分" aria-hidden="true">#</a> 01、传输方式划分</h3><p>就按照你的那副思维导图来说吧。</p><p>传输方式有两种，字节和字符，那首先得搞明白字节和字符有什么区别，对吧？</p><p>字节（byte）是计算机中用来表示存储容量的一个计量单位，通常情况下，一个字节有 8 位（bit）。</p><p>字符（char）可以是计算机中使用的字母、数字、和符号，比如说 A 1 $ 这些。</p><p>通常来说，一个字母或者一个字符占用一个字节，一个汉字占用两个字节。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/shangtou-02.png" alt=""></p><p>具体还要看字符编码，比如说在 UTF-8 编码下，一个英文字母（不分大小写）为一个字节，一个中文汉字为三个字节；在 Unicode 编码中，一个英文字母为一个字节，一个中文汉字为两个字节。</p><p>PS：关于字符编码，可以看前面的章节：<a href="https://mp.weixin.qq.com/s/pNQjlXOivIgO3pbYc0GnpA" target="_blank" rel="noopener noreferrer">锟斤拷<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><p>明白了字节与字符的区别，再来看字节流和字符流就会轻松多了。</p><p>字节流用来处理二进制文件，比如说图片啊、MP3 啊、视频啊。</p><p>字符流用来处理文本文件，文本文件可以看作是一种特殊的二进制文件，只不过经过了编码，便于人们阅读。</p><p>换句话说就是，字节流可以处理一切文件，而字符流只能处理文本。</p><p>虽然 IO 类很多，但核心的就是 4 个抽象类：InputStream、OutputStream、Reader、Writer。</p><p>（<strong>抽象大法真好</strong>）</p><p>虽然 IO 类的方法也很多，但核心的也就 2 个：read 和 write。</p><p><strong>InputStream 类</strong></p><ul><li><code>int read()</code>：读取数据</li><li><code>int read(byte b[], int off, int len)</code>：从第 off 位置开始读，读取 len 长度的字节，然后放入数组 b 中</li><li><code>long skip(long n)</code>：跳过指定个数的字节</li><li><code>int available()</code>：返回可读的字节数</li><li><code>void close()</code>：关闭流，释放资源</li></ul><p><strong>OutputStream 类</strong></p><ul><li><code>void write(int b)</code>： 写入一个字节，虽然参数是一个 int 类型，但只有低 8 位才会写入，高 24 位会舍弃（这块后面再讲）</li><li><code>void write(byte b[], int off, int len)</code>： 将数组 b 中的从 off 位置开始，长度为 len 的字节写入</li><li><code>void flush()</code>： 强制刷新，将缓冲区的数据写入</li><li><code>void close()</code>：关闭流</li></ul><p><strong>Reader 类</strong></p><ul><li><code>int read()</code>：读取单个字符</li><li><code>int read(char cbuf[], int off, int len)</code>：从第 off 位置开始读，读取 len 长度的字符，然后放入数组 b 中</li><li><code>long skip(long n)</code>：跳过指定个数的字符</li><li><code>int ready()</code>：是否可以读了</li><li><code>void close()</code>：关闭流，释放资源</li></ul><p><strong>Writer 类</strong></p><ul><li><code>void write(int c)</code>： 写入一个字符</li><li><code>void write( char cbuf[], int off, int len)</code>： 将数组 cbuf 中的从 off 位置开始，长度为 len 的字符写入</li><li><code>void flush()</code>： 强制刷新，将缓冲区的数据写入</li><li><code>void close()</code>：关闭流</li></ul><p>理解了上面这些方法，基本上 IO 的灵魂也就全部掌握了。</p><h3 id="_02、操作对象划分" tabindex="-1"><a class="header-anchor" href="#_02、操作对象划分" aria-hidden="true">#</a> 02、操作对象划分</h3><p>小二，你细想一下，IO IO，不就是输入输出（Input/Output）嘛：</p><ul><li>Input：将外部的数据读入内存，比如说把文件从硬盘读取到内存，从网络读取数据到内存等等</li><li>Output：将内存中的数据写入到外部，比如说把数据从内存写入到文件，把数据从内存输出到网络等等。</li></ul><p>所有的程序，在执行的时候，都是在内存上进行的，一旦关机，内存中的数据就没了，那如果想要持久化，就需要把内存中的数据输出到外部，比如说文件。</p><p>文件操作算是 IO 中最典型的操作了，也是最频繁的操作。那其实你可以换个角度来思考，比如说按照 IO 的操作对象来思考，IO 就可以分类为：文件、数组、管道、基本数据类型、缓冲、打印、对象序列化/反序列化，以及转换等。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/io/shangtou-03.png" alt=""></p><p><strong>1）文件</strong></p><p>文件流也就是直接操作文件的流，可以细分为字节流（FileInputStream 和 FileOuputStream）和字符流（FileReader 和 FileWriter）。</p><p>FileInputStream 的例子：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">int</span> b<span class="token punctuation">;</span>
 <span class="token class-name">FileInputStream</span> fis1 <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">FileInputStream</span><span class="token punctuation">(</span><span class="token string">&quot;fis.txt&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 <span class="token comment">// 循环读取</span>
 <span class="token keyword">while</span> <span class="token punctuation">(</span><span class="token punctuation">(</span>b <span class="token operator">=</span> fis1<span class="token punctuation">.</span><span class="token function">read</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token operator">!=</span><span class="token operator">-</span><span class="token number">1</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
@@ -162,6 +162,6 @@ isr<span class="token punctuation">.</span><span class="token function">close</s
 out<span class="token punctuation">.</span><span class="token function">write</span><span class="token punctuation">(</span><span class="token string">&quot;hello world!!&quot;</span><span class="token punctuation">)</span> <span class="token punctuation">;</span>    <span class="token comment">// 使用字符流输出  </span>
 out<span class="token punctuation">.</span><span class="token function">close</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>“小二啊，你看，经过我的梳理，是不是感觉 IO 也没多少东西！针对不同的场景、不同的业务，选择对应的 IO 流就可以了，用法上就是读和写。”老王一口气讲完这些，长长的舒了一口气。</p><p>此时此刻的小二，还沉浸在老王的滔滔不绝中。不仅感觉老王的肺活量是真的大，还感慨老王不愧是工作了十多年的“老油条”，一下子就把自己感觉头大的 IO 给梳理得很清晰了。</p><hr><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/io/shangtou.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/14 上午7:14:28</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><!----><a href="/io/BIONIOAIO.html" class="nav-link next" aria-label="BIO、NIO和AIO"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">BIO、NIO和AIO<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->深入浅出 Java 8 Lambda表达式</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月15日</span><meta property="datePublished" content="2022-03-15T14:42:30.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><meta property="articleSection" content="Java核心"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 7 分钟</span><meta property="timeRequired" content="PT7M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/java8/Lambda.html#_01、初识-lambda" class="router-link-active router-link-exact-active toc-link level3">01、初识 Lambda</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/java8/Lambda.html#_02、lambda-语法" class="router-link-active router-link-exact-active toc-link level3">02、Lambda 语法</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/java8/Lambda.html#_03、lambda-和-this-关键字" class="router-link-active router-link-exact-active toc-link level3">03、Lambda 和 this 关键字</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/java8/Lambda.html#_04、最后" class="router-link-active router-link-exact-active toc-link level3">04、最后</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="深入浅出-java-8-lambda表达式" tabindex="-1"><a class="header-anchor" href="#深入浅出-java-8-lambda表达式" aria-hidden="true">#</a> 深入浅出 Java 8 Lambda表达式</h1><p>今天分享的主题是《Lambda 表达式入门》，这也是之前一些读者留言强烈要求我写一写的，不好意思，让你们久等了，现在来满足你们，为时不晚吧？</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/java8/Lambda-1.jpg" alt=""></p><h3 id="_01、初识-lambda" tabindex="-1"><a class="header-anchor" href="#_01、初识-lambda" aria-hidden="true">#</a> 01、初识 Lambda</h3><p>Lambda 表达式描述了一个代码块（或者叫匿名方法），可以将其作为参数传递给构造方法或者普通方法以便后续执行。考虑下面这段代码：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">-&gt;</span> <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">&quot;沉默王二&quot;</span><span class="token punctuation">)</span>
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class="sidebar-heading clickable"><!----><span class="title">2.6 IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">2.9 Java新特性</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/java8/stream.html" class="nav-link sidebar-link sidebar-page" aria-label="Stream"><!---->Stream<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/java8/optional.html" class="nav-link sidebar-link sidebar-page" aria-label="Optional"><!---->Optional<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/java8/Lambda.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="Lambda"><!---->Lambda<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/java8/Lambda.html#_01、初识-lambda" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="01、初识 Lambda"><!---->01、初识 Lambda<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/java8/Lambda.html#_02、lambda-语法" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="02、Lambda 语法"><!---->02、Lambda 语法<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/java8/Lambda.html#_03、lambda-和-this-关键字" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="03、Lambda 和 this 关键字"><!---->03、Lambda 和 this 关键字<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/java8/Lambda.html#_04、最后" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="04、最后"><!---->04、最后<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.11 并发编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->深入浅出 Java 8 Lambda表达式</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月15日</span><meta property="datePublished" content="2022-03-15T14:42:30.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 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class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/java8/Lambda.html#_01、初识-lambda" class="router-link-active router-link-exact-active toc-link level3">01、初识 Lambda</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/java8/Lambda.html#_02、lambda-语法" class="router-link-active router-link-exact-active toc-link level3">02、Lambda 语法</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/java8/Lambda.html#_03、lambda-和-this-关键字" class="router-link-active router-link-exact-active toc-link level3">03、Lambda 和 this 关键字</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/java8/Lambda.html#_04、最后" class="router-link-active router-link-exact-active toc-link level3">04、最后</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="深入浅出-java-8-lambda表达式" tabindex="-1"><a class="header-anchor" href="#深入浅出-java-8-lambda表达式" aria-hidden="true">#</a> 深入浅出 Java 8 Lambda表达式</h1><p>今天分享的主题是《Lambda 表达式入门》，这也是之前一些读者留言强烈要求我写一写的，不好意思，让你们久等了，现在来满足你们，为时不晚吧？</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/java8/Lambda-1.jpg" alt=""></p><h3 id="_01、初识-lambda" tabindex="-1"><a class="header-anchor" href="#_01、初识-lambda" aria-hidden="true">#</a> 01、初识 Lambda</h3><p>Lambda 表达式描述了一个代码块（或者叫匿名方法），可以将其作为参数传递给构造方法或者普通方法以便后续执行。考虑下面这段代码：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">-&gt;</span> <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">&quot;沉默王二&quot;</span><span class="token punctuation">)</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>来从左到右解释一下，<code>()</code> 为 Lambda 表达式的参数列表（本例中没有参数），<code>-&gt;</code> 标识这串代码为 Lambda 表达式（也就是说，看到 <code>-&gt;</code> 就知道这是 Lambda），<code>System.out.println(&quot;沉默王二&quot;)</code> 为要执行的代码，即将“沉默王二”打印到标准输出流。</p><p>有点 Java 基础的同学应该不会对 Runnable 接口感到陌生，这是多线程的一个基础接口，它的定义如下：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token annotation punctuation">@FunctionalInterface</span>
 <span class="token keyword">public</span> <span class="token keyword">interface</span> <span class="token class-name">Runnable</span>
 <span class="token punctuation">{</span>
@@ -184,6 +184,6 @@ c <span class="token operator">=</span> <span class="token number">2</span><span
 <span class="token keyword">this</span> <span class="token operator">=</span> <span class="token class-name"><span class="token namespace">com<span class="token punctuation">.</span>cmower<span class="token punctuation">.</span>java_demo<span class="token punctuation">.</span>journal<span class="token punctuation">.</span></span>LamadaTest</span>$<span class="token number">1</span><span class="token annotation punctuation">@64f033cb</span>
 <span class="token keyword">this</span> <span class="token operator">=</span> <span class="token class-name"><span class="token namespace">com<span class="token punctuation">.</span>cmower<span class="token punctuation">.</span>java_demo<span class="token punctuation">.</span>journal<span class="token punctuation">.</span></span>LamadaTest</span><span class="token annotation punctuation">@3feba861</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>符合我们分析的预期。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/java8/Lambda-4.jpg" alt=""></p><h3 id="_04、最后" tabindex="-1"><a class="header-anchor" href="#_04、最后" aria-hidden="true">#</a> 04、最后</h3><p>尽管 Lambda 表达式在简化 Java 编程方面做了很多令人惊讶的努力，但在某些情况下，不当的使用仍然会导致不必要的混乱，大家伙慎用。</p><p>好了，我亲爱的读者朋友们，以上就是本文的全部内容了。能在疫情期间坚持看技术文，二哥必须要伸出大拇指为你点个赞👍。原创不易，如果觉得有点用的话，请不要吝啬你手中<strong>点赞</strong>的权力——因为这将是我写作的最强动力。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/java8/Lambda.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/14 上午7:14:28</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/java8/optional.html" class="nav-link prev" aria-label="Optional"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->Optional</div></a><!----></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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heading" aria-label="09、转换值"><!---->09、转换值<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/java8/Lambda.html" class="nav-link sidebar-link sidebar-page" aria-label="Lambda"><!---->Lambda<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.11 并发编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java 8 Optional最佳指南</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2019年1月1日</span><meta property="datePublished" content="2019-01-01T00:00:00.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 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aria-current="page" href="/java8/optional.html#_01、没有-optional-会有什么问题" class="router-link-active router-link-exact-active toc-link level3">01、没有 Optional 会有什么问题</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/java8/optional.html#_02、optional-是如何解决这个问题的" class="router-link-active router-link-exact-active toc-link level3">02、Optional 是如何解决这个问题的</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/java8/optional.html#_03、创建-optional-对象" class="router-link-active router-link-exact-active toc-link level3">03、创建 Optional 对象</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/java8/optional.html#_04、判断值是否存在" class="router-link-active router-link-exact-active toc-link level3">04、判断值是否存在</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/java8/optional.html#_05、非空表达式" class="router-link-active router-link-exact-active toc-link level3">05、非空表达式</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/java8/optional.html#_06、设置-获取-默认值" class="router-link-active router-link-exact-active toc-link level3">06、设置（获取）默认值</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/java8/optional.html#_07、获取值" class="router-link-active router-link-exact-active toc-link level3">07、获取值</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/java8/optional.html#_08、过滤值" class="router-link-active router-link-exact-active toc-link level3">08、过滤值</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/java8/optional.html#_09、转换值" class="router-link-active router-link-exact-active toc-link level3">09、转换值</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="java-8-optional最佳指南" tabindex="-1"><a class="header-anchor" href="#java-8-optional最佳指南" aria-hidden="true">#</a> Java 8 Optional最佳指南</h1><p>想学习，永远都不晚，尤其是针对 Java 8 里面的好东西，Optional 就是其中之一，该类提供了一种用于表示可选值而非空引用的类级别解决方案。作为一名 Java 程序员，我真的是烦透了 NullPointerException（NPE），尽管和它熟得就像一位老朋友，知道它也是迫不得已——程序正在使用一个对象却发现这个对象的值为 null，于是 Java 虚拟机就怒发冲冠地把它抛了出来当做替罪羊。</p><p>当然了，我们程序员是富有责任心的，不会坐视不管，于是就有了大量的 null 值检查。尽管有时候这种检查完全没有必要，但我们已经习惯了例行公事。终于，Java 8 看不下去了，就引入了 Optional，以便我们编写的代码不再那么刻薄呆板。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/java8/optional-1.jpg" alt=""></p><h3 id="_01、没有-optional-会有什么问题" tabindex="-1"><a class="header-anchor" href="#_01、没有-optional-会有什么问题" aria-hidden="true">#</a> 01、没有 Optional 会有什么问题</h3><p>我们来模拟一个实际的应用场景。小王第一天上班，领导老马就给他安排了一个任务，要他从数据库中根据会员 ID 拉取一个会员的姓名，然后将姓名打印到控制台。虽然是新来的，但这个任务难不倒小王，于是他花了 10 分钟写下了这段代码：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">WithoutOptionalDemo</span> <span class="token punctuation">{</span>
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对象"><!---->03、创建 Optional 对象<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/java8/optional.html#_04、判断值是否存在" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="04、判断值是否存在"><!---->04、判断值是否存在<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/java8/optional.html#_05、非空表达式" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="05、非空表达式"><!---->05、非空表达式<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/java8/optional.html#_06、设置-获取-默认值" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="06、设置（获取）默认值"><!---->06、设置（获取）默认值<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/java8/optional.html#_07、获取值" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="07、获取值"><!---->07、获取值<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/java8/optional.html#_08、过滤值" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="08、过滤值"><!---->08、过滤值<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/java8/optional.html#_09、转换值" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="09、转换值"><!---->09、转换值<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/java8/Lambda.html" class="nav-link sidebar-link sidebar-page" aria-label="Lambda"><!---->Lambda<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.11 并发编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java 8 Optional最佳指南</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2019年1月1日</span><meta property="datePublished" content="2019-01-01T00:00:00.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><meta property="articleSection" content="Java核心"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 9 分钟</span><meta property="timeRequired" content="PT9M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/java8/optional.html#_01、没有-optional-会有什么问题" class="router-link-active router-link-exact-active toc-link level3">01、没有 Optional 会有什么问题</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/java8/optional.html#_02、optional-是如何解决这个问题的" class="router-link-active router-link-exact-active toc-link level3">02、Optional 是如何解决这个问题的</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/java8/optional.html#_03、创建-optional-对象" class="router-link-active router-link-exact-active toc-link level3">03、创建 Optional 对象</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/java8/optional.html#_04、判断值是否存在" class="router-link-active router-link-exact-active toc-link level3">04、判断值是否存在</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/java8/optional.html#_05、非空表达式" class="router-link-active router-link-exact-active toc-link level3">05、非空表达式</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/java8/optional.html#_06、设置-获取-默认值" class="router-link-active router-link-exact-active toc-link level3">06、设置（获取）默认值</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/java8/optional.html#_07、获取值" class="router-link-active router-link-exact-active toc-link level3">07、获取值</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/java8/optional.html#_08、过滤值" class="router-link-active router-link-exact-active toc-link level3">08、过滤值</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/java8/optional.html#_09、转换值" class="router-link-active router-link-exact-active toc-link level3">09、转换值</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="java-8-optional最佳指南" tabindex="-1"><a class="header-anchor" href="#java-8-optional最佳指南" aria-hidden="true">#</a> Java 8 Optional最佳指南</h1><p>想学习，永远都不晚，尤其是针对 Java 8 里面的好东西，Optional 就是其中之一，该类提供了一种用于表示可选值而非空引用的类级别解决方案。作为一名 Java 程序员，我真的是烦透了 NullPointerException（NPE），尽管和它熟得就像一位老朋友，知道它也是迫不得已——程序正在使用一个对象却发现这个对象的值为 null，于是 Java 虚拟机就怒发冲冠地把它抛了出来当做替罪羊。</p><p>当然了，我们程序员是富有责任心的，不会坐视不管，于是就有了大量的 null 值检查。尽管有时候这种检查完全没有必要，但我们已经习惯了例行公事。终于，Java 8 看不下去了，就引入了 Optional，以便我们编写的代码不再那么刻薄呆板。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/java8/optional-1.jpg" alt=""></p><h3 id="_01、没有-optional-会有什么问题" tabindex="-1"><a class="header-anchor" href="#_01、没有-optional-会有什么问题" aria-hidden="true">#</a> 01、没有 Optional 会有什么问题</h3><p>我们来模拟一个实际的应用场景。小王第一天上班，领导老马就给他安排了一个任务，要他从数据库中根据会员 ID 拉取一个会员的姓名，然后将姓名打印到控制台。虽然是新来的，但这个任务难不倒小王，于是他花了 10 分钟写下了这段代码：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">WithoutOptionalDemo</span> <span class="token punctuation">{</span>
     <span class="token keyword">class</span> <span class="token class-name">Member</span> <span class="token punctuation">{</span>
         <span class="token keyword">private</span> <span class="token class-name">String</span> name<span class="token punctuation">;</span>
 
@@ -203,6 +203,6 @@ opt <span class="token operator">=</span> <span class="token class-name">Optiona
     <span class="token punctuation">}</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/java8/optional-2.jpg" alt=""></p><p>好了，我亲爱的读者朋友，以上就是本文的全部内容了——可以说是史上最佳 Optional 指南了，能看到这里的都是最优秀的程序员，二哥必须要伸出大拇指为你点个赞。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/java8/optional.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/14 上午7:14:28</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/java8/stream.html" class="nav-link prev" aria-label="Stream"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->Stream</div></a><a href="/java8/Lambda.html" class="nav-link next" aria-label="Lambda"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">Lambda<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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+    <script type="module" src="/assets/app.615e41d8.js" defer></script>
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diff --git a/dist/java8/stream.html b/dist/java8/stream.html
index b152607c..ea2e8a58 100644
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+++ b/dist/java8/stream.html
@@ -39,10 +39,10 @@
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active"><!----><span class="title">2.9 Java新特性</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a aria-current="page" href="/java8/stream.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="Stream"><!---->Stream<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/java8/stream.html#_01、创建流" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="01、创建流"><!---->01、创建流<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/java8/stream.html#_02、操作流" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="02、操作流"><!---->02、操作流<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/java8/stream.html#_03、转换流" class="router-link-active 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class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java 8 Stream流详细用法</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 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15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 7 分钟</span><meta property="timeRequired" content="PT7M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/java8/stream.html#_01、创建流" class="router-link-active router-link-exact-active toc-link level3">01、创建流</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/java8/stream.html#_02、操作流" class="router-link-active router-link-exact-active toc-link level3">02、操作流</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/java8/stream.html#_03、转换流" class="router-link-active router-link-exact-active toc-link level3">03、转换流</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="java-8-stream流详细用法" tabindex="-1"><a class="header-anchor" href="#java-8-stream流详细用法" aria-hidden="true">#</a> Java 8 Stream流详细用法</h1><p>两个星期以前，就有读者强烈要求我写一篇 Java Stream 流的文章，我说市面上不是已经有很多了吗，结果你猜他怎么说：“就想看你写的啊！”你看你看，多么苍白的喜欢啊。那就“勉为其难”写一篇吧，嘻嘻。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/java8/stream-1.jpg" alt=""></p><p>单从“Stream”这个单词上来看，它似乎和 java.io 包下的 InputStream 和 OutputStream 有些关系。实际上呢，没毛关系。Java 8 新增的 Stream 是为了解放程序员操作集合（Collection）时的生产力，之所以能解放，很大一部分原因可以归功于同时出现的 Lambda 表达式——极大的提高了编程效率和程序可读性。</p><p>Stream 究竟是什么呢？</p><blockquote><p>Stream 就好像一个高级的迭代器，但只能遍历一次，就好像一江春水向东流；在流的过程中，对流中的元素执行一些操作，比如“过滤掉长度大于 10 的字符串”、“获取每个字符串的首字母”等。</p></blockquote><p>要想操作流，首先需要有一个数据源，可以是数组或者集合。每次操作都会返回一个新的流对象，方便进行链式操作，但原有的流对象会保持不变。</p><p>流的操作可以分为两种类型：</p><p>1）中间操作，可以有多个，每次返回一个新的流，可进行链式操作。</p><p>2）终端操作，只能有一个，每次执行完，这个流也就用光光了，无法执行下一个操作，因此只能放在最后。</p><p>来举个例子。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">List</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">String</span><span class="token punctuation">&gt;</span></span> list <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">ArrayList</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token punctuation">&gt;</span></span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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clickable"><!----><span class="title">2.1 Java概述</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.2 Java基础语法</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.3 面向对象编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.4 字符串&amp;数组</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.5 集合框架（容器）</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.6 IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">2.9 Java新特性</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a aria-current="page" href="/java8/stream.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="Stream"><!---->Stream<!----></a><ul class="sidebar-sub-headers"><li 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right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java 8 Stream流详细用法</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 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106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><meta property="articleSection" content="Java核心"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 7 分钟</span><meta property="timeRequired" content="PT7M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/java8/stream.html#_01、创建流" class="router-link-active router-link-exact-active toc-link level3">01、创建流</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/java8/stream.html#_02、操作流" class="router-link-active router-link-exact-active toc-link level3">02、操作流</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/java8/stream.html#_03、转换流" class="router-link-active router-link-exact-active toc-link level3">03、转换流</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="java-8-stream流详细用法" tabindex="-1"><a class="header-anchor" href="#java-8-stream流详细用法" aria-hidden="true">#</a> Java 8 Stream流详细用法</h1><p>两个星期以前，就有读者强烈要求我写一篇 Java Stream 流的文章，我说市面上不是已经有很多了吗，结果你猜他怎么说：“就想看你写的啊！”你看你看，多么苍白的喜欢啊。那就“勉为其难”写一篇吧，嘻嘻。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/java8/stream-1.jpg" alt=""></p><p>单从“Stream”这个单词上来看，它似乎和 java.io 包下的 InputStream 和 OutputStream 有些关系。实际上呢，没毛关系。Java 8 新增的 Stream 是为了解放程序员操作集合（Collection）时的生产力，之所以能解放，很大一部分原因可以归功于同时出现的 Lambda 表达式——极大的提高了编程效率和程序可读性。</p><p>Stream 究竟是什么呢？</p><blockquote><p>Stream 就好像一个高级的迭代器，但只能遍历一次，就好像一江春水向东流；在流的过程中，对流中的元素执行一些操作，比如“过滤掉长度大于 10 的字符串”、“获取每个字符串的首字母”等。</p></blockquote><p>要想操作流，首先需要有一个数据源，可以是数组或者集合。每次操作都会返回一个新的流对象，方便进行链式操作，但原有的流对象会保持不变。</p><p>流的操作可以分为两种类型：</p><p>1）中间操作，可以有多个，每次返回一个新的流，可进行链式操作。</p><p>2）终端操作，只能有一个，每次执行完，这个流也就用光光了，无法执行下一个操作，因此只能放在最后。</p><p>来举个例子。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">List</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">String</span><span class="token punctuation">&gt;</span></span> list <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">ArrayList</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token punctuation">&gt;</span></span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 list<span class="token punctuation">.</span><span class="token function">add</span><span class="token punctuation">(</span><span class="token string">&quot;武汉加油&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 list<span class="token punctuation">.</span><span class="token function">add</span><span class="token punctuation">(</span><span class="token string">&quot;中国加油&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 list<span class="token punctuation">.</span><span class="token function">add</span><span class="token punctuation">(</span><span class="token string">&quot;世界加油&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
@@ -171,6 +171,6 @@ true
 <span class="token punctuation">[</span>周杰伦<span class="token punctuation">,</span> 王力宏<span class="token punctuation">,</span> 陶喆<span class="token punctuation">,</span> 林俊杰<span class="token punctuation">]</span>
 周杰伦<span class="token punctuation">,</span> 王力宏<span class="token punctuation">,</span> 陶喆<span class="token punctuation">,</span> 林俊杰
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/java8/stream-2.jpg" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/java8/stream.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/14 上午7:14:28</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><!----><a href="/java8/optional.html" class="nav-link next" aria-label="Optional"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">Optional<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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+    <script type="module" src="/assets/app.615e41d8.js" defer></script>
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diff --git a/dist/jvm/asm.html b/dist/jvm/asm.html
index 2949b405..7153c4fe 100644
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+++ b/dist/jvm/asm.html
@@ -39,10 +39,10 @@
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aria-label="操作数栈"><!---->操作数栈<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/asm.html#jvm指令" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="JVM指令"><!---->JVM指令<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/asm.html#asm操作" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="ASM操作"><!---->ASM操作<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/asm.html#asm-api" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="ASM API"><!---->ASM API<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/asm.html#methodvisitor方法解析" class="router-link-active router-link-exact-active nav-link 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class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/gc.html" class="nav-link sidebar-link sidebar-page" aria-label="从头到尾说一次Java垃圾回收"><!---->从头到尾说一次Java垃圾回收<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/tujie-gc.html" class="nav-link sidebar-link sidebar-page" aria-label="图解Java的垃圾回收机制"><!---->图解Java的垃圾回收机制<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/problem-tools.html" class="nav-link sidebar-link sidebar-page" aria-label="Java问题诊断和排查工具"><!---->Java问题诊断和排查工具<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/jit.html" class="nav-link sidebar-link sidebar-page" aria-label="JIT原理解析及实践"><!---->JIT原理解析及实践<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/oom.html" class="nav-link sidebar-link sidebar-page" aria-label="内存溢出排查优化实战"><!---->内存溢出排查优化实战<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/cpu-percent-100.html" class="nav-link sidebar-link sidebar-page" aria-label="CPU 100% 排查优化实践"><!---->CPU 100% 排查优化实践<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/zongjie.html" class="nav-link sidebar-link sidebar-page" aria-label="JVM 核心知识点总结"><!---->JVM 核心知识点总结<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->史上最通俗易懂的ASM教程</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" 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18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><li class="category category1" role>JVM</li><meta property="articleSection" content="Java核心,JVM"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 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88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 7 分钟</span><meta property="timeRequired" content="PT7M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/asm.html#一勺思想" class="router-link-active router-link-exact-active toc-link level2">一勺思想</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/asm.html#前言" class="router-link-active router-link-exact-active toc-link level2">前言</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/asm.html#class字节码" class="router-link-active router-link-exact-active toc-link level2">class字节码</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/asm.html#jvm基于栈的设计模式" class="router-link-active router-link-exact-active toc-link level2">JVM基于栈的设计模式</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/asm.html#局部变量表" class="router-link-active router-link-exact-active toc-link level3">局部变量表</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/asm.html#操作数栈" class="router-link-active router-link-exact-active toc-link level3">操作数栈</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/asm.html#jvm指令" class="router-link-active router-link-exact-active toc-link level3">JVM指令</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/asm.html#asm操作" class="router-link-active router-link-exact-active toc-link level2">ASM操作</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/asm.html#asm-api" class="router-link-active router-link-exact-active toc-link level2">ASM API</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/asm.html#methodvisitor方法解析" class="router-link-active router-link-exact-active toc-link level2">MethodVisitor方法解析</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/asm.html#asm-使用demo" class="router-link-active router-link-exact-active toc-link level3">ASM 使用Demo</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="史上最通俗易懂的asm教程" tabindex="-1"><a class="header-anchor" href="#史上最通俗易懂的asm教程" aria-hidden="true">#</a> 史上最通俗易懂的ASM教程</h1><h2 id="一勺思想" tabindex="-1"><a class="header-anchor" href="#一勺思想" aria-hidden="true">#</a> 一勺思想</h2><p>We are all in the gutter, but some of us are looking at the stars. （我们都生活在阴沟里，但仍有人仰望星空 ）- 王尔德 《温德米尔夫人的扇子》</p><p>举世混浊我独清，众人皆醉我独醒 - 屈原 《楚辞》</p><h2 id="前言" tabindex="-1"><a class="header-anchor" href="#前言" aria-hidden="true">#</a> 前言</h2><p>ASM是一种通用Java字节码操作和分析框架。它可以用于修改现有的class文件或动态生成class文件。</p><blockquote><p>**ASM **is an all purpose Java bytecode manipulation and analysis framework. It can be used to modify existing classes or to dynamically generate classes, directly in binary form. ASM provides some common bytecode transformations and analysis algorithms from which custom complex transformations and code analysis tools can be built. ASM offers similar functionality as other Java bytecode frameworks, but is focused on<a href="https://asm.ow2.io/performance.html" target="_blank" rel="noopener noreferrer">performance<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>. Because it was designed and implemented to be as small and as fast as possible, it is well suited for use in dynamic systems (but can of course be used in a static way too, e.g. in compilers).</p></blockquote><p>本篇文章分享的是对ASM的理解和应用，之前需要我们掌握<strong>class字节码</strong>，<strong>JVM基于栈的设计模式,JVM指令</strong></p><h2 id="class字节码" tabindex="-1"><a class="header-anchor" href="#class字节码" aria-hidden="true">#</a> class字节码</h2><p>我们编写的java文件，会通过javac命令编译为class文件，JVM最终会执行该类型文件来运行程序。下图所示为class文件结构。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/asm-43844b78-c01f-4990-b038-3c91ff2eeb34.jpg" alt=""></p><p>下面我们通过一个简单的实例来进行说明。下面是我们编写的一个简单的java文件，只是简单的函数调用.</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">Test</span> <span class="token punctuation">{</span>
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class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.11 并发编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">2.12 JVM</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/jvm/what-is-jvm.html" class="nav-link sidebar-link sidebar-page" aria-label="JVM到底是什么？"><!---->JVM到底是什么？<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/how-run-java-code.html" class="nav-link sidebar-link sidebar-page" aria-label="JVM到底是如何运行Java代码的"><!---->JVM到底是如何运行Java代码的<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/class-load.html" class="nav-link sidebar-link sidebar-page" aria-label="类加载机制"><!---->类加载机制<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a 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class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/jvm/asm.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="史上最通俗易懂的ASM教程"><!---->史上最通俗易懂的ASM教程<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/asm.html#一勺思想" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="一勺思想"><!---->一勺思想<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/asm.html#前言" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="前言"><!---->前言<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/asm.html#class字节码" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="class字节码"><!---->class字节码<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/asm.html#jvm基于栈的设计模式" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="JVM基于栈的设计模式"><!---->JVM基于栈的设计模式<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/asm.html#局部变量表" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="局部变量表"><!---->局部变量表<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/asm.html#操作数栈" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="操作数栈"><!---->操作数栈<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/asm.html#jvm指令" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="JVM指令"><!---->JVM指令<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/asm.html#asm操作" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="ASM操作"><!---->ASM操作<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/asm.html#asm-api" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="ASM API"><!---->ASM API<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/asm.html#methodvisitor方法解析" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="MethodVisitor方法解析"><!---->MethodVisitor方法解析<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/asm.html#asm-使用demo" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="ASM 使用Demo"><!---->ASM 使用Demo<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li></ul><!--]--></li><li><!--[--><a href="/jvm/compile-jdk.html" class="nav-link sidebar-link sidebar-page" aria-label="自己编译JDK"><!---->自己编译JDK<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/neicun-jiegou.html" class="nav-link sidebar-link sidebar-page" aria-label="深入理解JVM的内存结构"><!---->深入理解JVM的内存结构<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/whereis-the-object.html" class="nav-link sidebar-link sidebar-page" aria-label="Java 创建的对象到底放在哪"><!---->Java 创建的对象到底放在哪<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/gc.html" class="nav-link sidebar-link sidebar-page" aria-label="从头到尾说一次Java垃圾回收"><!---->从头到尾说一次Java垃圾回收<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/tujie-gc.html" class="nav-link sidebar-link sidebar-page" aria-label="图解Java的垃圾回收机制"><!---->图解Java的垃圾回收机制<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/problem-tools.html" class="nav-link sidebar-link sidebar-page" aria-label="Java问题诊断和排查工具"><!---->Java问题诊断和排查工具<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/jit.html" class="nav-link sidebar-link sidebar-page" aria-label="JIT原理解析及实践"><!---->JIT原理解析及实践<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/oom.html" class="nav-link sidebar-link sidebar-page" aria-label="内存溢出排查优化实战"><!---->内存溢出排查优化实战<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/cpu-percent-100.html" class="nav-link sidebar-link sidebar-page" aria-label="CPU 100% 排查优化实践"><!---->CPU 100% 排查优化实践<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/zongjie.html" class="nav-link sidebar-link sidebar-page" aria-label="JVM 核心知识点总结"><!---->JVM 核心知识点总结<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->史上最通俗易懂的ASM教程</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 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01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月27日</span><meta property="datePublished" content="2022-03-27T04:07:13.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><li class="category category1" role>JVM</li><meta property="articleSection" content="Java核心,JVM"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 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content="PT7M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/asm.html#一勺思想" class="router-link-active router-link-exact-active toc-link level2">一勺思想</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/asm.html#前言" class="router-link-active router-link-exact-active toc-link level2">前言</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/asm.html#class字节码" class="router-link-active router-link-exact-active toc-link level2">class字节码</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/asm.html#jvm基于栈的设计模式" class="router-link-active router-link-exact-active toc-link level2">JVM基于栈的设计模式</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/asm.html#局部变量表" class="router-link-active router-link-exact-active toc-link level3">局部变量表</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/asm.html#操作数栈" class="router-link-active router-link-exact-active toc-link level3">操作数栈</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/asm.html#jvm指令" class="router-link-active router-link-exact-active toc-link level3">JVM指令</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/asm.html#asm操作" class="router-link-active router-link-exact-active toc-link level2">ASM操作</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/asm.html#asm-api" class="router-link-active router-link-exact-active toc-link level2">ASM API</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/asm.html#methodvisitor方法解析" class="router-link-active router-link-exact-active toc-link level2">MethodVisitor方法解析</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/asm.html#asm-使用demo" class="router-link-active router-link-exact-active toc-link level3">ASM 使用Demo</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="史上最通俗易懂的asm教程" tabindex="-1"><a class="header-anchor" href="#史上最通俗易懂的asm教程" aria-hidden="true">#</a> 史上最通俗易懂的ASM教程</h1><h2 id="一勺思想" tabindex="-1"><a class="header-anchor" href="#一勺思想" aria-hidden="true">#</a> 一勺思想</h2><p>We are all in the gutter, but some of us are looking at the stars. （我们都生活在阴沟里，但仍有人仰望星空 ）- 王尔德 《温德米尔夫人的扇子》</p><p>举世混浊我独清，众人皆醉我独醒 - 屈原 《楚辞》</p><h2 id="前言" tabindex="-1"><a class="header-anchor" href="#前言" aria-hidden="true">#</a> 前言</h2><p>ASM是一种通用Java字节码操作和分析框架。它可以用于修改现有的class文件或动态生成class文件。</p><blockquote><p>**ASM **is an all purpose Java bytecode manipulation and analysis framework. It can be used to modify existing classes or to dynamically generate classes, directly in binary form. ASM provides some common bytecode transformations and analysis algorithms from which custom complex transformations and code analysis tools can be built. ASM offers similar functionality as other Java bytecode frameworks, but is focused on<a href="https://asm.ow2.io/performance.html" target="_blank" rel="noopener noreferrer">performance<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>. Because it was designed and implemented to be as small and as fast as possible, it is well suited for use in dynamic systems (but can of course be used in a static way too, e.g. in compilers).</p></blockquote><p>本篇文章分享的是对ASM的理解和应用，之前需要我们掌握<strong>class字节码</strong>，<strong>JVM基于栈的设计模式,JVM指令</strong></p><h2 id="class字节码" tabindex="-1"><a class="header-anchor" href="#class字节码" aria-hidden="true">#</a> class字节码</h2><p>我们编写的java文件，会通过javac命令编译为class文件，JVM最终会执行该类型文件来运行程序。下图所示为class文件结构。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/asm-43844b78-c01f-4990-b038-3c91ff2eeb34.jpg" alt=""></p><p>下面我们通过一个简单的实例来进行说明。下面是我们编写的一个简单的java文件，只是简单的函数调用.</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">Test</span> <span class="token punctuation">{</span>
     <span class="token keyword">private</span> <span class="token keyword">int</span> num1 <span class="token operator">=</span> <span class="token number">1</span><span class="token punctuation">;</span>
     <span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">int</span> NUM1 <span class="token operator">=</span> <span class="token number">100</span><span class="token punctuation">;</span>
     <span class="token keyword">public</span> <span class="token keyword">int</span> <span class="token function">func</span><span class="token punctuation">(</span><span class="token keyword">int</span> a<span class="token punctuation">,</span><span class="token keyword">int</span> b<span class="token punctuation">)</span><span class="token punctuation">{</span>
@@ -263,6 +263,6 @@ mv.visitLocalVariable(&quot;b&quot;, &quot;I&quot;, null, l0, l1, 2);
 mv.visitMaxs(2, 3);
 mv.visitEnd();
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>可以看出ASM是在指令层次上操作字节码的，和class字节码更加接近。如果我们有些字节码操作的需求，ASM一定可以实现的。只是使用起来比较麻烦一些。这里强烈推荐一款ASM插件</p><blockquote><p>https://plugins.jetbrains.com/plugin/5918-asm-bytecode-outline</p></blockquote><p>可以一键生成对应的ASM API代码</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/asm-3c8c8db4-5b6a-4576-b147-62965d0e0c1c.jpg" alt=""></p><hr><blockquote><p>参考链接：https://zhuanlan.zhihu.com/p/94498015</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/jvm/asm.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/14 上午7:14:28</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/jvm/hsdb.html" class="nav-link prev" aria-label="HSDB（Hotspot Debugger）"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->HSDB（Hotspot Debugger）</div></a><a href="/jvm/compile-jdk.html" class="nav-link next" aria-label="自己编译JDK"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">自己编译JDK<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->从javap的角度轻松看懂字节码</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 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href="/jvm/bytecode.html#_01、字节码" class="router-link-active router-link-exact-active toc-link level3">01、字节码</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/bytecode.html#_02、反编译字节码文件" class="router-link-active router-link-exact-active toc-link level3">02、反编译字节码文件</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/bytecode.html#_03、常量池" class="router-link-active router-link-exact-active toc-link level3">03、常量池</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/bytecode.html#_04、字段表集合" class="router-link-active router-link-exact-active toc-link level3">04、字段表集合</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/bytecode.html#_05、方法表集合" class="router-link-active router-link-exact-active toc-link level3">05、方法表集合</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="从javap的角度轻松看懂字节码" tabindex="-1"><a class="header-anchor" href="#从javap的角度轻松看懂字节码" aria-hidden="true">#</a> 从javap的角度轻松看懂字节码</h1><h3 id="_01、字节码" tabindex="-1"><a class="header-anchor" href="#_01、字节码" aria-hidden="true">#</a> 01、字节码</h3><p>计算机比较“傻”，只认 0 和 1，这意味着我们编写的代码最终都要编译成机器码才能被计算机执行。Java 在诞生之初就提出了一个非常著名的宣传口号: &quot;<strong>一次编写，处处运行</strong>&quot;。</p><blockquote><p><strong>Write Once, Run Anywhere.</strong></p></blockquote><p>为了这个口号，Java 的亲妈 Sun 公司以及其他虚拟机提供商发布了许多可以在不同平台上运行的 Java 虚拟机，而这些虚拟机都拥有一个共同的功能，那就是可以载入和执行同一种与平台无关的字节码（Byte Code）。</p><p>有了 Java 虚拟机的帮助，我们编写的 Java 源代码不必再根据不同平台编译成对应的机器码了，只需要生成一份字节码，然后再将字节码文件交由运行在不同平台上的 Java 虚拟机读取后执行就可以了。</p><p>如今的 Java 虚拟机非常强大，不仅支持 Java 语言，还支持很多其他的编程语言，比如说 Groovy、Scala、Koltin 等等。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/bytecode-dd31bbd6-c75c-4426-9437-c0f57ea3b86f.png" alt=""></p><p>来看一段代码吧。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">Main</span> <span class="token punctuation">{</span>
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clickable"><!----><span class="title">2.1 Java概述</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.2 Java基础语法</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.3 面向对象编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.4 字符串&amp;数组</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.5 集合框架（容器）</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.6 IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.11 并发编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">2.12 JVM</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/jvm/what-is-jvm.html" class="nav-link sidebar-link sidebar-page" aria-label="JVM到底是什么？"><!---->JVM到底是什么？<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/how-run-java-code.html" class="nav-link sidebar-link sidebar-page" aria-label="JVM到底是如何运行Java代码的"><!---->JVM到底是如何运行Java代码的<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/class-load.html" class="nav-link sidebar-link sidebar-page" aria-label="类加载机制"><!---->类加载机制<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a 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class="sidebar-sub-header"><a aria-current="page" href="/jvm/bytecode.html#_03、常量池" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="03、常量池"><!---->03、常量池<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/bytecode.html#_04、字段表集合" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="04、字段表集合"><!---->04、字段表集合<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/bytecode.html#_05、方法表集合" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="05、方法表集合"><!---->05、方法表集合<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/jvm/zijiema-zhiling.html" class="nav-link sidebar-link sidebar-page" aria-label="字节码指令详解"><!---->字节码指令详解<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/how-jvm-run-zijiema-zhiling.html" class="nav-link sidebar-link sidebar-page" aria-label="虚拟机是如何执行字节码指令的"><!---->虚拟机是如何执行字节码指令的<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/hsdb.html" class="nav-link sidebar-link sidebar-page" aria-label="HSDB（Hotspot Debugger）"><!---->HSDB（Hotspot Debugger）<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/asm.html" class="nav-link sidebar-link sidebar-page" aria-label="史上最通俗易懂的ASM教程"><!---->史上最通俗易懂的ASM教程<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/compile-jdk.html" class="nav-link sidebar-link sidebar-page" aria-label="自己编译JDK"><!---->自己编译JDK<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/neicun-jiegou.html" class="nav-link sidebar-link sidebar-page" aria-label="深入理解JVM的内存结构"><!---->深入理解JVM的内存结构<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/whereis-the-object.html" class="nav-link sidebar-link sidebar-page" aria-label="Java 创建的对象到底放在哪"><!---->Java 创建的对象到底放在哪<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/gc.html" class="nav-link sidebar-link sidebar-page" aria-label="从头到尾说一次Java垃圾回收"><!---->从头到尾说一次Java垃圾回收<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/tujie-gc.html" class="nav-link sidebar-link sidebar-page" aria-label="图解Java的垃圾回收机制"><!---->图解Java的垃圾回收机制<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/problem-tools.html" class="nav-link sidebar-link sidebar-page" aria-label="Java问题诊断和排查工具"><!---->Java问题诊断和排查工具<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/jit.html" class="nav-link sidebar-link sidebar-page" aria-label="JIT原理解析及实践"><!---->JIT原理解析及实践<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/oom.html" class="nav-link sidebar-link sidebar-page" aria-label="内存溢出排查优化实战"><!---->内存溢出排查优化实战<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/cpu-percent-100.html" class="nav-link sidebar-link sidebar-page" aria-label="CPU 100% 排查优化实践"><!---->CPU 100% 排查优化实践<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/zongjie.html" class="nav-link sidebar-link sidebar-page" aria-label="JVM 核心知识点总结"><!---->JVM 核心知识点总结<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->从javap的角度轻松看懂字节码</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 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0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><li class="category category1" role>JVM</li><meta property="articleSection" content="Java核心,JVM"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 11 分钟</span><meta property="timeRequired" content="PT11M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/bytecode.html#_01、字节码" class="router-link-active router-link-exact-active toc-link level3">01、字节码</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/bytecode.html#_02、反编译字节码文件" class="router-link-active router-link-exact-active toc-link level3">02、反编译字节码文件</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/bytecode.html#_03、常量池" class="router-link-active router-link-exact-active toc-link level3">03、常量池</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/bytecode.html#_04、字段表集合" class="router-link-active router-link-exact-active toc-link level3">04、字段表集合</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/bytecode.html#_05、方法表集合" class="router-link-active router-link-exact-active toc-link level3">05、方法表集合</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="从javap的角度轻松看懂字节码" tabindex="-1"><a class="header-anchor" href="#从javap的角度轻松看懂字节码" aria-hidden="true">#</a> 从javap的角度轻松看懂字节码</h1><h3 id="_01、字节码" tabindex="-1"><a class="header-anchor" href="#_01、字节码" aria-hidden="true">#</a> 01、字节码</h3><p>计算机比较“傻”，只认 0 和 1，这意味着我们编写的代码最终都要编译成机器码才能被计算机执行。Java 在诞生之初就提出了一个非常著名的宣传口号: &quot;<strong>一次编写，处处运行</strong>&quot;。</p><blockquote><p><strong>Write Once, Run Anywhere.</strong></p></blockquote><p>为了这个口号，Java 的亲妈 Sun 公司以及其他虚拟机提供商发布了许多可以在不同平台上运行的 Java 虚拟机，而这些虚拟机都拥有一个共同的功能，那就是可以载入和执行同一种与平台无关的字节码（Byte Code）。</p><p>有了 Java 虚拟机的帮助，我们编写的 Java 源代码不必再根据不同平台编译成对应的机器码了，只需要生成一份字节码，然后再将字节码文件交由运行在不同平台上的 Java 虚拟机读取后执行就可以了。</p><p>如今的 Java 虚拟机非常强大，不仅支持 Java 语言，还支持很多其他的编程语言，比如说 Groovy、Scala、Koltin 等等。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/bytecode-dd31bbd6-c75c-4426-9437-c0f57ea3b86f.png" alt=""></p><p>来看一段代码吧。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">Main</span> <span class="token punctuation">{</span>
     <span class="token keyword">private</span> <span class="token keyword">int</span> age <span class="token operator">=</span> <span class="token number">18</span><span class="token punctuation">;</span>
     <span class="token keyword">public</span> <span class="token keyword">int</span> <span class="token function">getAge</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
         <span class="token keyword">return</span> age<span class="token punctuation">;</span>
@@ -173,6 +173,6 @@ SourceFile: &quot;Main.java&quot;
         Start  Length  Slot  Name   Signature
             0       5     0  this   Lcom/itwanger/jvm/Main;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>最大操作数栈为 1，局部变量所需要的存储空间为 1，方法的参数个数为 1，是因为局部变量只有一个隐藏的 this，并且字节码指令中只执行了一次 aload_0。</p><hr><p>其实学习是这样的，可以横向扩展，也可以纵向扩展。当我们初学编程的时候，特别想多学一点，属于横向扩展，当有了一定的编程经验后，想更上一层楼，就需要纵向扩展，不断深入地学，连根拔起，从而形成自己的知识体系。</p><p>无论是从十六进制的字节码角度，还是 jclasslib 图形化查看反编译后的字节码的角度，也或者是今天这样从 javap 反编译后的角度，都能窥探出一些新的内容来！</p><p>初学者一开始接触字节码的时候会感觉比较头大，没关系，我当初也是这样，随着时间的推移，经验的积累，慢慢就好了，越往深处钻，就越能体会到那种“技术我有，雄霸天下”的感觉~</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/jvm/bytecode.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/14 上午7:14:28</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/jvm/class-file-jiegou.html" class="nav-link prev" aria-label="详解Java的类文件结构"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->详解Java的类文件结构</div></a><a href="/jvm/zijiema-zhiling.html" class="nav-link next" aria-label="字节码指令详解"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">字节码指令详解<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
-    <script type="module" src="/assets/app.a0271b9c.js" defer></script>
+    <script type="module" src="/assets/app.615e41d8.js" defer></script>
   </body>
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diff --git a/dist/jvm/class-file-jiegou.html b/dist/jvm/class-file-jiegou.html
index fb0dc27e..0fe28c66 100644
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aria-label="一、前言"><!---->一、前言<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">二、Java核心</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.1 Java概述</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.2 Java基础语法</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.3 面向对象编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.4 字符串&amp;数组</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.5 集合框架（容器）</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.6 IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.11 并发编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">2.12 JVM</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/jvm/what-is-jvm.html" class="nav-link sidebar-link sidebar-page" aria-label="JVM到底是什么？"><!---->JVM到底是什么？<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/how-run-java-code.html" class="nav-link sidebar-link sidebar-page" aria-label="JVM到底是如何运行Java代码的"><!---->JVM到底是如何运行Java代码的<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/class-load.html" class="nav-link sidebar-link sidebar-page" aria-label="类加载机制"><!---->类加载机制<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/jvm/class-file-jiegou.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="详解Java的类文件结构"><!---->详解Java的类文件结构<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/class-file-jiegou.html#_01、魔数" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="01、魔数"><!---->01、魔数<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/class-file-jiegou.html#_02、版本号" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="02、版本号"><!---->02、版本号<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/class-file-jiegou.html#_03、常量池" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="03、常量池"><!---->03、常量池<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/class-file-jiegou.html#_04、访问标记" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="04、访问标记"><!---->04、访问标记<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/class-file-jiegou.html#_05、this-class、super-class、interfaces" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="05、this_class、super_class、interfaces"><!---->05、this_class、super_class、interfaces<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/class-file-jiegou.html#_06、字段表" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="06、字段表"><!---->06、字段表<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/class-file-jiegou.html#_07、方法表" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="07、方法表"><!---->07、方法表<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/class-file-jiegou.html#_08、属性表" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="08、属性表"><!---->08、属性表<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/jvm/bytecode.html" class="nav-link sidebar-link sidebar-page" aria-label="从javap的角度轻松看懂字节码"><!---->从javap的角度轻松看懂字节码<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/zijiema-zhiling.html" class="nav-link sidebar-link sidebar-page" aria-label="字节码指令详解"><!---->字节码指令详解<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/how-jvm-run-zijiema-zhiling.html" class="nav-link sidebar-link sidebar-page" aria-label="虚拟机是如何执行字节码指令的"><!---->虚拟机是如何执行字节码指令的<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/hsdb.html" class="nav-link sidebar-link sidebar-page" aria-label="HSDB（Hotspot Debugger）"><!---->HSDB（Hotspot Debugger）<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/asm.html" class="nav-link sidebar-link sidebar-page" aria-label="史上最通俗易懂的ASM教程"><!---->史上最通俗易懂的ASM教程<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/compile-jdk.html" class="nav-link sidebar-link sidebar-page" aria-label="自己编译JDK"><!---->自己编译JDK<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/neicun-jiegou.html" class="nav-link sidebar-link sidebar-page" aria-label="深入理解JVM的内存结构"><!---->深入理解JVM的内存结构<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/whereis-the-object.html" class="nav-link sidebar-link sidebar-page" aria-label="Java 创建的对象到底放在哪"><!---->Java 创建的对象到底放在哪<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/gc.html" class="nav-link sidebar-link sidebar-page" aria-label="从头到尾说一次Java垃圾回收"><!---->从头到尾说一次Java垃圾回收<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/tujie-gc.html" class="nav-link sidebar-link sidebar-page" aria-label="图解Java的垃圾回收机制"><!---->图解Java的垃圾回收机制<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/problem-tools.html" class="nav-link sidebar-link sidebar-page" aria-label="Java问题诊断和排查工具"><!---->Java问题诊断和排查工具<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/jit.html" class="nav-link sidebar-link sidebar-page" aria-label="JIT原理解析及实践"><!---->JIT原理解析及实践<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/oom.html" class="nav-link sidebar-link sidebar-page" aria-label="内存溢出排查优化实战"><!---->内存溢出排查优化实战<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/cpu-percent-100.html" class="nav-link sidebar-link sidebar-page" aria-label="CPU 100% 排查优化实践"><!---->CPU 100% 排查优化实践<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/zongjie.html" class="nav-link sidebar-link sidebar-page" aria-label="JVM 核心知识点总结"><!---->JVM 核心知识点总结<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->详解Java的类文件（class文件）结构</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月27日</span><meta property="datePublished" content="2022-03-27T04:07:13.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><li class="category category1" role>JVM</li><meta property="articleSection" content="Java核心,JVM"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" 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16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 12 分钟</span><meta property="timeRequired" content="PT12M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/class-file-jiegou.html#_01、魔数" class="router-link-active router-link-exact-active toc-link level3">01、魔数</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/class-file-jiegou.html#_02、版本号" class="router-link-active router-link-exact-active toc-link level3">02、版本号</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/class-file-jiegou.html#_03、常量池" class="router-link-active router-link-exact-active toc-link level3">03、常量池</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/class-file-jiegou.html#_04、访问标记" class="router-link-active router-link-exact-active toc-link level3">04、访问标记</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/class-file-jiegou.html#_05、this-class、super-class、interfaces" class="router-link-active router-link-exact-active toc-link level3">05、this_class、super_class、interfaces</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/class-file-jiegou.html#_06、字段表" class="router-link-active router-link-exact-active toc-link level3">06、字段表</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/class-file-jiegou.html#_07、方法表" class="router-link-active router-link-exact-active toc-link level3">07、方法表</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/class-file-jiegou.html#_08、属性表" class="router-link-active router-link-exact-active toc-link level3">08、属性表</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="详解java的类文件-class文件-结构" tabindex="-1"><a class="header-anchor" href="#详解java的类文件-class文件-结构" aria-hidden="true">#</a> 详解Java的类文件（class文件）结构</h1><p>大家好，我是二哥呀，今天我拿了一把小刀，准备解剖一下 Java 的 class 文件。</p><p>CS 的世界里流行着这么一句话，“计算机科学领域的任何问题都可以通过增加一个中间层来解决”。对于 Java 来说，JVM 就是这么一个产物，“Write once, Run anywhere”之所以能实现，靠得就是 JVM，它能在不同的操作系统下运行同一份源代码编译后的 class 文件。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/class-file-jiegou-dfd7ce0d-1da2-4547-b2d7-57e0350f5911.png" alt=""></p><p>Java 是跨平台的，JVM 作为中间层，自然要针对不同的操作系统提供不同的实现。拿 JDK 11 来说，它的实现就有上图中提到的这么多种。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/class-file-jiegou-b1386f9e-c69b-44b0-a8d0-69ffbe9ed31f.png" alt=""></p><p>通过不同操作系统的 JVM，我们的源代码就可以不用根据不同的操作系统编译成不同的二进制可执行文件了，跨平台的目标也就实现了。那这个 class 文件到底是什么玩意呢？它是怎么被 JVM 识别的呢？</p><p>我们用 IDEA 编写一段简单的 Java 代码，文件名为 Hello.java。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">package</span> <span class="token namespace">com<span class="token punctuation">.</span>itwanger<span class="token punctuation">.</span>jvm</span><span class="token punctuation">;</span>
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clickable"><!----><span class="title">2.1 Java概述</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.2 Java基础语法</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.3 面向对象编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.4 字符串&amp;数组</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.5 集合框架（容器）</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.6 IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.11 并发编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">2.12 JVM</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/jvm/what-is-jvm.html" class="nav-link sidebar-link sidebar-page" aria-label="JVM到底是什么？"><!---->JVM到底是什么？<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/how-run-java-code.html" class="nav-link sidebar-link sidebar-page" aria-label="JVM到底是如何运行Java代码的"><!---->JVM到底是如何运行Java代码的<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/class-load.html" class="nav-link sidebar-link sidebar-page" aria-label="类加载机制"><!---->类加载机制<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/jvm/class-file-jiegou.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="详解Java的类文件结构"><!---->详解Java的类文件结构<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/class-file-jiegou.html#_01、魔数" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="01、魔数"><!---->01、魔数<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/class-file-jiegou.html#_02、版本号" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="02、版本号"><!---->02、版本号<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/class-file-jiegou.html#_03、常量池" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="03、常量池"><!---->03、常量池<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/class-file-jiegou.html#_04、访问标记" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="04、访问标记"><!---->04、访问标记<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/class-file-jiegou.html#_05、this-class、super-class、interfaces" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="05、this_class、super_class、interfaces"><!---->05、this_class、super_class、interfaces<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/class-file-jiegou.html#_06、字段表" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="06、字段表"><!---->06、字段表<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" 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aria-label="虚拟机是如何执行字节码指令的"><!---->虚拟机是如何执行字节码指令的<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/hsdb.html" class="nav-link sidebar-link sidebar-page" aria-label="HSDB（Hotspot Debugger）"><!---->HSDB（Hotspot Debugger）<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/asm.html" class="nav-link sidebar-link sidebar-page" aria-label="史上最通俗易懂的ASM教程"><!---->史上最通俗易懂的ASM教程<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/compile-jdk.html" class="nav-link sidebar-link sidebar-page" aria-label="自己编译JDK"><!---->自己编译JDK<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/neicun-jiegou.html" class="nav-link sidebar-link sidebar-page" aria-label="深入理解JVM的内存结构"><!---->深入理解JVM的内存结构<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/whereis-the-object.html" class="nav-link sidebar-link sidebar-page" aria-label="Java 创建的对象到底放在哪"><!---->Java 创建的对象到底放在哪<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/gc.html" class="nav-link sidebar-link sidebar-page" aria-label="从头到尾说一次Java垃圾回收"><!---->从头到尾说一次Java垃圾回收<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/tujie-gc.html" class="nav-link sidebar-link sidebar-page" aria-label="图解Java的垃圾回收机制"><!---->图解Java的垃圾回收机制<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/problem-tools.html" class="nav-link sidebar-link sidebar-page" aria-label="Java问题诊断和排查工具"><!---->Java问题诊断和排查工具<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/jit.html" class="nav-link sidebar-link sidebar-page" aria-label="JIT原理解析及实践"><!---->JIT原理解析及实践<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/oom.html" class="nav-link sidebar-link sidebar-page" aria-label="内存溢出排查优化实战"><!---->内存溢出排查优化实战<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/cpu-percent-100.html" class="nav-link sidebar-link sidebar-page" aria-label="CPU 100% 排查优化实践"><!---->CPU 100% 排查优化实践<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/zongjie.html" class="nav-link sidebar-link sidebar-page" aria-label="JVM 核心知识点总结"><!---->JVM 核心知识点总结<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->详解Java的类文件（class文件）结构</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon 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18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><li class="category category1" role>JVM</li><meta property="articleSection" content="Java核心,JVM"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 12 分钟</span><meta property="timeRequired" content="PT12M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/class-file-jiegou.html#_01、魔数" class="router-link-active router-link-exact-active toc-link level3">01、魔数</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/class-file-jiegou.html#_02、版本号" class="router-link-active router-link-exact-active toc-link level3">02、版本号</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/class-file-jiegou.html#_03、常量池" class="router-link-active router-link-exact-active toc-link level3">03、常量池</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/class-file-jiegou.html#_04、访问标记" class="router-link-active router-link-exact-active toc-link level3">04、访问标记</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/class-file-jiegou.html#_05、this-class、super-class、interfaces" class="router-link-active router-link-exact-active toc-link level3">05、this_class、super_class、interfaces</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/class-file-jiegou.html#_06、字段表" class="router-link-active router-link-exact-active toc-link level3">06、字段表</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/class-file-jiegou.html#_07、方法表" class="router-link-active router-link-exact-active toc-link level3">07、方法表</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/class-file-jiegou.html#_08、属性表" class="router-link-active router-link-exact-active toc-link level3">08、属性表</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="详解java的类文件-class文件-结构" tabindex="-1"><a class="header-anchor" href="#详解java的类文件-class文件-结构" aria-hidden="true">#</a> 详解Java的类文件（class文件）结构</h1><p>大家好，我是二哥呀，今天我拿了一把小刀，准备解剖一下 Java 的 class 文件。</p><p>CS 的世界里流行着这么一句话，“计算机科学领域的任何问题都可以通过增加一个中间层来解决”。对于 Java 来说，JVM 就是这么一个产物，“Write once, Run anywhere”之所以能实现，靠得就是 JVM，它能在不同的操作系统下运行同一份源代码编译后的 class 文件。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/class-file-jiegou-dfd7ce0d-1da2-4547-b2d7-57e0350f5911.png" alt=""></p><p>Java 是跨平台的，JVM 作为中间层，自然要针对不同的操作系统提供不同的实现。拿 JDK 11 来说，它的实现就有上图中提到的这么多种。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/class-file-jiegou-b1386f9e-c69b-44b0-a8d0-69ffbe9ed31f.png" alt=""></p><p>通过不同操作系统的 JVM，我们的源代码就可以不用根据不同的操作系统编译成不同的二进制可执行文件了，跨平台的目标也就实现了。那这个 class 文件到底是什么玩意呢？它是怎么被 JVM 识别的呢？</p><p>我们用 IDEA 编写一段简单的 Java 代码，文件名为 Hello.java。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">package</span> <span class="token namespace">com<span class="token punctuation">.</span>itwanger<span class="token punctuation">.</span>jvm</span><span class="token punctuation">;</span>
 <span class="token keyword">class</span> <span class="token class-name">Hello</span> <span class="token punctuation">{</span>
     <span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">void</span> <span class="token function">main</span><span class="token punctuation">(</span><span class="token class-name">String</span><span class="token punctuation">[</span><span class="token punctuation">]</span> args<span class="token punctuation">)</span> <span class="token punctuation">{</span>
         <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">&quot;Hello!&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
@@ -118,6 +118,6 @@
     <span class="token punctuation">}</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>main 方法中调用了 foo 方法。通过 jclasslib 看一下它当中一个很重要的属性——Code， 方法的关键信息都存储在里面。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/class-file-jiegou-e76339a8-0aab-418b-9722-4b3c8591693c.png" alt=""></p><ul><li>Attribute name index 指向常量池中值为“Code”的常量。</li><li>Attribute length 为属性值的长度大小。</li><li>bytecode 存储真正的字节码指令。</li><li>exception table 表示方法内部的异常信息。</li><li>maximum stack size 表示操作数栈的最大深度，方法执行的任意期间操作数栈深度都不会超过这个值。</li><li>maximum local variable 表示临时变量表的大小，注意，并不等于方法中所有临时变量的数量之和，当一个作用域结束，内部的临时变量占用的位置就会被替换掉。</li><li>code length 表示字节码指令的长度。</li></ul><p>对应 class 文件中的位置如下图所示。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/class-file-jiegou-b5853549-b17b-48eb-8eb3-a393fb5d655f.png" alt=""></p><p>到此为止，class 文件的内部算是剖析得差不多了，希望能对大家有所帮助。第一次拿刀，手有点颤，如果哪里有不足的地方，欢迎大家在评论区毫不留情地指出来！</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/jvm/class-file-jiegou.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/14 上午7:14:28</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/jvm/class-load.html" class="nav-link prev" aria-label="类加载机制"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->类加载机制</div></a><a href="/jvm/bytecode.html" class="nav-link next" aria-label="从javap的角度轻松看懂字节码"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">从javap的角度轻松看懂字节码<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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diff --git a/dist/jvm/class-load.html b/dist/jvm/class-load.html
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aria-label="自己编译JDK"><!---->自己编译JDK<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/neicun-jiegou.html" class="nav-link sidebar-link sidebar-page" aria-label="深入理解JVM的内存结构"><!---->深入理解JVM的内存结构<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/whereis-the-object.html" class="nav-link sidebar-link sidebar-page" aria-label="Java 创建的对象到底放在哪"><!---->Java 创建的对象到底放在哪<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/gc.html" class="nav-link sidebar-link sidebar-page" aria-label="从头到尾说一次Java垃圾回收"><!---->从头到尾说一次Java垃圾回收<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/tujie-gc.html" class="nav-link sidebar-link sidebar-page" aria-label="图解Java的垃圾回收机制"><!---->图解Java的垃圾回收机制<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/problem-tools.html" class="nav-link sidebar-link sidebar-page" aria-label="Java问题诊断和排查工具"><!---->Java问题诊断和排查工具<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/jit.html" class="nav-link sidebar-link sidebar-page" aria-label="JIT原理解析及实践"><!---->JIT原理解析及实践<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/oom.html" class="nav-link sidebar-link sidebar-page" aria-label="内存溢出排查优化实战"><!---->内存溢出排查优化实战<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/cpu-percent-100.html" class="nav-link sidebar-link sidebar-page" aria-label="CPU 100% 排查优化实践"><!---->CPU 100% 排查优化实践<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/zongjie.html" class="nav-link sidebar-link sidebar-page" aria-label="JVM 核心知识点总结"><!---->JVM 核心知识点总结<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->我竟然不再抗拒Java的类加载机制了</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 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947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月27日</span><meta property="datePublished" content="2022-03-27T04:07:13.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><li class="category category1" role>JVM</li><meta property="articleSection" content="Java核心,JVM"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 8 分钟</span><meta property="timeRequired" content="PT8M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/class-load.html#_01、字节码" class="router-link-active router-link-exact-active toc-link level3">01、字节码</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/class-load.html#_02、类加载过程" class="router-link-active router-link-exact-active toc-link level3">02、类加载过程</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/class-load.html#_03、类加载器" class="router-link-active router-link-exact-active toc-link level3">03、类加载器</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/class-load.html#_04、双亲委派模型" class="router-link-active router-link-exact-active toc-link level3">04、双亲委派模型</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/class-load.html#_05、最后" class="router-link-active router-link-exact-active toc-link level3">05、最后</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="我竟然不再抗拒java的类加载机制了" tabindex="-1"><a class="header-anchor" href="#我竟然不再抗拒java的类加载机制了" aria-hidden="true">#</a> 我竟然不再抗拒Java的类加载机制了</h1><h3 id="_01、字节码" tabindex="-1"><a class="header-anchor" href="#_01、字节码" aria-hidden="true">#</a> 01、字节码</h3><p>在聊 Java 类加载机制之前，需要先了解一下 Java 字节码，因为它和类加载机制息息相关。</p><p>计算机只认识 0 和 1，所以任何语言编写的程序都需要编译成机器码才能被计算机理解，然后执行，Java 也不例外。</p><p>Java 在诞生的时候喊出了一个非常牛逼的口号：“Write Once, Run Anywhere”，为了达成这个目的，Sun 公司发布了许多可以在不同平台（Windows、Linux）上运行的 Java 虚拟机（JVM）——负责载入和执行 Java 编译后的字节码。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/class-load-01.png" alt=""></p><p>到底 Java 字节码是什么样子，我们借助一段简单的代码来看一看。</p><p>源码如下：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">package</span> <span class="token namespace">com<span class="token punctuation">.</span>cmower<span class="token punctuation">.</span>java_demo</span><span class="token punctuation">;</span>
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clickable"><!----><span class="title">2.1 Java概述</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.2 Java基础语法</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.3 面向对象编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.4 字符串&amp;数组</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.5 集合框架（容器）</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.6 IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.11 并发编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">2.12 JVM</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/jvm/what-is-jvm.html" class="nav-link sidebar-link sidebar-page" aria-label="JVM到底是什么？"><!---->JVM到底是什么？<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/how-run-java-code.html" class="nav-link sidebar-link sidebar-page" aria-label="JVM到底是如何运行Java代码的"><!---->JVM到底是如何运行Java代码的<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/jvm/class-load.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="类加载机制"><!---->类加载机制<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/class-load.html#_01、字节码" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="01、字节码"><!---->01、字节码<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/class-load.html#_02、类加载过程" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="02、类加载过程"><!---->02、类加载过程<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/class-load.html#_03、类加载器" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="03、类加载器"><!---->03、类加载器<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/class-load.html#_04、双亲委派模型" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="04、双亲委派模型"><!---->04、双亲委派模型<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/class-load.html#_05、最后" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="05、最后"><!---->05、最后<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/jvm/class-file-jiegou.html" class="nav-link sidebar-link sidebar-page" aria-label="详解Java的类文件结构"><!---->详解Java的类文件结构<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/bytecode.html" class="nav-link sidebar-link sidebar-page" aria-label="从javap的角度轻松看懂字节码"><!---->从javap的角度轻松看懂字节码<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/zijiema-zhiling.html" class="nav-link sidebar-link sidebar-page" aria-label="字节码指令详解"><!---->字节码指令详解<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/how-jvm-run-zijiema-zhiling.html" class="nav-link sidebar-link sidebar-page" aria-label="虚拟机是如何执行字节码指令的"><!---->虚拟机是如何执行字节码指令的<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/hsdb.html" class="nav-link sidebar-link sidebar-page" aria-label="HSDB（Hotspot Debugger）"><!---->HSDB（Hotspot Debugger）<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/asm.html" class="nav-link sidebar-link sidebar-page" aria-label="史上最通俗易懂的ASM教程"><!---->史上最通俗易懂的ASM教程<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/compile-jdk.html" class="nav-link sidebar-link sidebar-page" aria-label="自己编译JDK"><!---->自己编译JDK<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/neicun-jiegou.html" class="nav-link sidebar-link sidebar-page" aria-label="深入理解JVM的内存结构"><!---->深入理解JVM的内存结构<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/whereis-the-object.html" class="nav-link sidebar-link sidebar-page" aria-label="Java 创建的对象到底放在哪"><!---->Java 创建的对象到底放在哪<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/gc.html" class="nav-link sidebar-link sidebar-page" aria-label="从头到尾说一次Java垃圾回收"><!---->从头到尾说一次Java垃圾回收<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/tujie-gc.html" class="nav-link sidebar-link sidebar-page" aria-label="图解Java的垃圾回收机制"><!---->图解Java的垃圾回收机制<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/problem-tools.html" class="nav-link sidebar-link sidebar-page" aria-label="Java问题诊断和排查工具"><!---->Java问题诊断和排查工具<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/jit.html" class="nav-link sidebar-link sidebar-page" aria-label="JIT原理解析及实践"><!---->JIT原理解析及实践<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/oom.html" class="nav-link sidebar-link sidebar-page" aria-label="内存溢出排查优化实战"><!---->内存溢出排查优化实战<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/cpu-percent-100.html" class="nav-link sidebar-link sidebar-page" aria-label="CPU 100% 排查优化实践"><!---->CPU 100% 排查优化实践<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/zongjie.html" class="nav-link sidebar-link sidebar-page" aria-label="JVM 核心知识点总结"><!---->JVM 核心知识点总结<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->我竟然不再抗拒Java的类加载机制了</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月27日</span><meta property="datePublished" content="2022-03-27T04:07:13.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><li class="category category1" role>JVM</li><meta property="articleSection" content="Java核心,JVM"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 8 分钟</span><meta property="timeRequired" content="PT8M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/class-load.html#_01、字节码" class="router-link-active router-link-exact-active toc-link level3">01、字节码</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/class-load.html#_02、类加载过程" class="router-link-active router-link-exact-active toc-link level3">02、类加载过程</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/class-load.html#_03、类加载器" class="router-link-active router-link-exact-active toc-link level3">03、类加载器</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/class-load.html#_04、双亲委派模型" class="router-link-active router-link-exact-active toc-link level3">04、双亲委派模型</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/class-load.html#_05、最后" class="router-link-active router-link-exact-active toc-link level3">05、最后</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="我竟然不再抗拒java的类加载机制了" tabindex="-1"><a class="header-anchor" href="#我竟然不再抗拒java的类加载机制了" aria-hidden="true">#</a> 我竟然不再抗拒Java的类加载机制了</h1><h3 id="_01、字节码" tabindex="-1"><a class="header-anchor" href="#_01、字节码" aria-hidden="true">#</a> 01、字节码</h3><p>在聊 Java 类加载机制之前，需要先了解一下 Java 字节码，因为它和类加载机制息息相关。</p><p>计算机只认识 0 和 1，所以任何语言编写的程序都需要编译成机器码才能被计算机理解，然后执行，Java 也不例外。</p><p>Java 在诞生的时候喊出了一个非常牛逼的口号：“Write Once, Run Anywhere”，为了达成这个目的，Sun 公司发布了许多可以在不同平台（Windows、Linux）上运行的 Java 虚拟机（JVM）——负责载入和执行 Java 编译后的字节码。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/class-load-01.png" alt=""></p><p>到底 Java 字节码是什么样子，我们借助一段简单的代码来看一看。</p><p>源码如下：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">package</span> <span class="token namespace">com<span class="token punctuation">.</span>cmower<span class="token punctuation">.</span>java_demo</span><span class="token punctuation">;</span>
 
 <span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">Test</span> <span class="token punctuation">{</span>
 
@@ -77,6 +77,6 @@
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>每个 Java 类都维护着一个指向定义它的类加载器的引用，通过 <code>类名.class.getClassLoader()</code> 可以获取到此引用；然后通过 <code>loader.getParent()</code> 可以获取类加载器的上层类加载器。</p><p>这段代码的输出结果如下：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>sun.misc.Launcher$AppClassLoader@73d16e93
 sun.misc.Launcher$ExtClassLoader@15db9742
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><p>第一行输出为 Test 的类加载器，即应用类加载器，它是 <code>sun.misc.Launcher$AppClassLoader</code> 类的实例；第二行输出为扩展类加载器，是 <code>sun.misc.Launcher$ExtClassLoader</code> 类的实例。那启动类加载器呢？</p><p>按理说，扩展类加载器的上层类加载器是启动类加载器，但在我这个版本的 JDK 中， 扩展类加载器的 <code>getParent()</code> 返回 <code>null</code>。所以没有输出。</p><h3 id="_04、双亲委派模型" tabindex="-1"><a class="header-anchor" href="#_04、双亲委派模型" aria-hidden="true">#</a> 04、双亲委派模型</h3><p>如果以上三种类加载器不能满足要求的话，程序员还可以自定义类加载器（继承 <code>java.lang.ClassLoader</code> 类），它们之间的层级关系如下图所示。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/class-load-02.png" alt=""></p><p>这种层次关系被称作为<strong>双亲委派模型</strong>：如果一个类加载器收到了加载类的请求，它会先把请求委托给上层加载器去完成，上层加载器又会委托上上层加载器，一直到最顶层的类加载器；如果上层加载器无法完成类的加载工作时，当前类加载器才会尝试自己去加载这个类。</p><p>PS：双亲委派模型突然让我联想到朱元璋同志，这个同志当上了皇帝之后连宰相都不要了，所有的事情都亲力亲为，只有自己没精力没时间做的事才交给大臣们去干。</p><p>使用双亲委派模型有一个很明显的好处，那就是 Java 类随着它的类加载器一起具备了一种带有优先级的层次关系，这对于保证 Java 程序的稳定运作很重要。</p><p>上文中曾提到，如果两个类的加载器不同，即使两个类来源于同一个字节码文件，那这两个类就必定不相等——双亲委派模型能够保证同一个类最终会被特定的类加载器加载。</p><h3 id="_05、最后" tabindex="-1"><a class="header-anchor" href="#_05、最后" aria-hidden="true">#</a> 05、最后</h3><p>硬着头皮翻看了大量的资料，并且动手去研究以后，我发现自己竟然对 Java 类加载机制（JVM 将类的信息动态添加到内存并使用的一种机制）不那么抗拒了——真是蛮奇妙的一件事啊。</p><p>也许学习就应该是这样，只要你敢于挑战自己，就能收获知识——就像山就在那里，只要你肯攀登，就能到达山顶。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/jvm/class-load.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/14 上午7:14:28</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/jvm/how-run-java-code.html" class="nav-link prev" aria-label="JVM到底是如何运行Java代码的"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->JVM到底是如何运行Java代码的</div></a><a href="/jvm/class-file-jiegou.html" class="nav-link next" aria-label="详解Java的类文件结构"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">详解Java的类文件结构<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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class="sidebar-sub-header"><a aria-current="page" href="/jvm/compile-jdk.html#_1、boot-jdk" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="1、boot JDK"><!---->1、boot JDK<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/compile-jdk.html#_2、unix环境" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="2、Unix环境"><!---->2、Unix环境<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/compile-jdk.html#_3、编译器-编译工具链" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="3、编译器/编译工具链"><!---->3、编译器/编译工具链<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/compile-jdk.html#_4、其他工具" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="4、其他工具"><!---->4、其他工具<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/compile-jdk.html#下载jdk源码" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="下载JDK源码"><!---->下载JDK源码<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/compile-jdk.html#方式一-通过mercurial工具下载" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="方式一：通过Mercurial工具下载"><!---->方式一：通过Mercurial工具下载<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/compile-jdk.html#方式二-直接下载打包好的源码包" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="方式二：直接下载打包好的源码包"><!---->方式二：直接下载打包好的源码包<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/compile-jdk.html#编译前的自动配置" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="编译前的自动配置"><!---->编译前的自动配置<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/compile-jdk.html#真正的编译动作" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="真正的编译动作"><!---->真正的编译动作<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/compile-jdk.html#验证成果" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="验证成果"><!---->验证成果<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/compile-jdk.html#_1、jdk-8的编译输出" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="1、JDK 8的编译输出"><!---->1、JDK 8的编译输出<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/compile-jdk.html#_2、jdk-11的编译输出" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="2、JDK 11的编译输出"><!---->2、JDK 11的编译输出<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/compile-jdk.html#使用自己编译的jdk" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="使用自己编译的JDK"><!---->使用自己编译的JDK<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/compile-jdk.html#关联jdk源码并修改" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="关联JDK源码并修改"><!---->关联JDK源码并修改<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/compile-jdk.html#多行注释的问题" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="多行注释的问题"><!---->多行注释的问题<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/jvm/neicun-jiegou.html" class="nav-link sidebar-link sidebar-page" aria-label="深入理解JVM的内存结构"><!---->深入理解JVM的内存结构<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/whereis-the-object.html" class="nav-link sidebar-link sidebar-page" aria-label="Java 创建的对象到底放在哪"><!---->Java 创建的对象到底放在哪<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/gc.html" class="nav-link sidebar-link sidebar-page" aria-label="从头到尾说一次Java垃圾回收"><!---->从头到尾说一次Java垃圾回收<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/tujie-gc.html" class="nav-link sidebar-link sidebar-page" aria-label="图解Java的垃圾回收机制"><!---->图解Java的垃圾回收机制<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/problem-tools.html" class="nav-link sidebar-link sidebar-page" aria-label="Java问题诊断和排查工具"><!---->Java问题诊断和排查工具<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/jit.html" class="nav-link sidebar-link sidebar-page" aria-label="JIT原理解析及实践"><!---->JIT原理解析及实践<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/oom.html" class="nav-link sidebar-link sidebar-page" aria-label="内存溢出排查优化实战"><!---->内存溢出排查优化实战<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/cpu-percent-100.html" class="nav-link sidebar-link sidebar-page" aria-label="CPU 100% 排查优化实践"><!---->CPU 100% 排查优化实践<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/zongjie.html" class="nav-link sidebar-link sidebar-page" aria-label="JVM 核心知识点总结"><!---->JVM 核心知识点总结<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->自己编译JDK</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月27日</span><meta property="datePublished" content="2022-03-27T04:07:13.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 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class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/compile-jdk.html#环境准备" class="router-link-active router-link-exact-active toc-link level2">环境准备</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/compile-jdk.html#_1、boot-jdk" class="router-link-active router-link-exact-active toc-link level3">1、boot JDK</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/compile-jdk.html#_2、unix环境" class="router-link-active router-link-exact-active toc-link level3">2、Unix环境</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/compile-jdk.html#_3、编译器-编译工具链" class="router-link-active router-link-exact-active toc-link level3">3、编译器/编译工具链</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/compile-jdk.html#_4、其他工具" class="router-link-active router-link-exact-active toc-link level3">4、其他工具</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/compile-jdk.html#下载jdk源码" class="router-link-active router-link-exact-active toc-link level2">下载JDK源码</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/compile-jdk.html#方式一-通过mercurial工具下载" class="router-link-active router-link-exact-active toc-link level3">方式一：通过Mercurial工具下载</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/compile-jdk.html#方式二-直接下载打包好的源码包" class="router-link-active router-link-exact-active toc-link level3">方式二：直接下载打包好的源码包</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/compile-jdk.html#编译前的自动配置" class="router-link-active router-link-exact-active toc-link level3">编译前的自动配置</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/compile-jdk.html#真正的编译动作" class="router-link-active router-link-exact-active toc-link level2">真正的编译动作</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/compile-jdk.html#验证成果" class="router-link-active router-link-exact-active toc-link level2">验证成果</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/compile-jdk.html#_1、jdk-8的编译输出" class="router-link-active router-link-exact-active toc-link level3">1、JDK 8的编译输出</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/compile-jdk.html#_2、jdk-11的编译输出" class="router-link-active router-link-exact-active toc-link level3">2、JDK 11的编译输出</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/compile-jdk.html#使用自己编译的jdk" class="router-link-active router-link-exact-active toc-link level2">使用自己编译的JDK</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/compile-jdk.html#关联jdk源码并修改" class="router-link-active router-link-exact-active toc-link level2">关联JDK源码并修改</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/compile-jdk.html#多行注释的问题" class="router-link-active router-link-exact-active toc-link level2">多行注释的问题</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="自己编译jdk" tabindex="-1"><a class="header-anchor" href="#自己编译jdk" aria-hidden="true">#</a> 自己编译JDK</h1><p>引用链接：https://segmentfault.com/a/1190000023251649</p><p>很多小伙伴们做<code>Java</code>开发，天天写<code>Java</code>代码，肯定离不开<code>Java</code>基础环境：<code>JDK</code>，毕竟我们写好的<code>Java</code>代码也是跑在<code>JVM</code>虚拟机上。</p><p>一般来说，我们学<code>Java</code>之前，第一步就是安装<code>JDK</code>环境。这个简单啊，我们一般直接把<code>JDK</code>从官网下载下来，安装完成，配个环境变量就可以愉快地使用了。</p><p>不过话说回来，对于这个天天使用的东西，我们难道不好奇这玩意儿它到底是怎么由源码编译出来的吗？</p><p>带着这个原始的疑问，今天准备大干一场，自己动动呆萌的小手，来编译一个属于自己的<code>JDK</code>吧！</p><h2 id="环境准备" tabindex="-1"><a class="header-anchor" href="#环境准备" aria-hidden="true">#</a> 环境准备</h2><blockquote><p>首选说在前面的是，编译前的软件版本关系极其重要，自己在踩坑时，所出现的各种奇奇怪怪的问题几乎都和这个有关，后来版本匹配之后，就非常顺利了。</p></blockquote><p>我们来<strong>盘点和梳理</strong>一下编译一个JDK需要哪些环境和工具：</p><h3 id="_1、boot-jdk" tabindex="-1"><a class="header-anchor" href="#_1、boot-jdk" aria-hidden="true">#</a> <strong>1、boot JDK</strong></h3><p>我们要想编译<code>JDK</code>，首先自己本机必须提前已经安装有一个<code>JDK</code>，官方称之为<code>bootstrap JDK</code>（或者称为<code>boot JDK</code>）。</p><p>比如想编译<code>JDK 8</code>，那本机必须最起码得有一个<code>JDK 7</code>或者更新一点的版本；你想编译<code>JDK 11</code>，那就要求本机必须装有<code>JDK 10</code>或者<code>11</code>。</p><blockquote><p>所以鸡生蛋、蛋生鸡又来了...</p></blockquote><h3 id="_2、unix环境" tabindex="-1"><a class="header-anchor" href="#_2、unix环境" aria-hidden="true">#</a> <strong>2、Unix环境</strong></h3><p>编译<code>JDK</code>需要<code>Unix</code>环境的支持！</p><p>这一点在<code>Linux</code>操作系统和<code>macOS</code>操作系统上已经天然的保证了，而对于<code>Windows</code>兄弟来说稍微麻烦一点，需要通过使用<code>Cygwin</code>或者<code>MinGW/MSYS</code>这种软件来模拟。</p><p>就像官方所说：在<code>Linux</code>平台编译<code>JDK</code>一般问题最少，容易成功；<code>macOS</code>次之；<code>Windows</code>上则需要稍微多花点精力，问题可能也多一些。</p><p>究其本质原因，还是因为<code>Windows</code>毕竟不是一个<code>Unix-Like</code>内核的系统，毕竟很多软件的原始编译都离不开<code>Unix Toolkit</code>，所以相对肯定要麻烦一些。</p><h3 id="_3、编译器-编译工具链" tabindex="-1"><a class="header-anchor" href="#_3、编译器-编译工具链" aria-hidden="true">#</a> <strong>3、编译器/编译工具链</strong></h3><p><code>JDK</code>底层源码（尤其<code>JVM</code>虚拟机部分）很多都是<code>C++/C</code>写的，所以相关编译器也跑不掉。</p><p>一图胜千言，各平台上的编译器支持如下表所示，按平台选择即可：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-3b66d5b6-272f-47bd-88f7-47146a06ef06.png" alt=""></p><h3 id="_4、其他工具" tabindex="-1"><a class="header-anchor" href="#_4、其他工具" aria-hidden="true">#</a> <strong>4、其他工具</strong></h3><p>典型的比如：</p><ul><li><code>Autoconf</code>：软件源码包的自动配置工具</li><li><code>Make</code>：编译构建工具</li><li><code>freetype</code>：一个免费的渲染库，<code>JDK</code>图形化部分的代码可能会用它</li></ul><p>好，环境盘点就到这里，接下来具体列一下我在编译<code>JDK 8</code>和<code>JDK 11</code>时分别用到的软件详细版本信息：</p><p><strong>编译JDK 8时：</strong></p><ul><li><code>操作系统</code>：macOS 10.11.6</li><li><code>boot JDK</code>：JDK 1.8.0 (build 1.8.0_201-b09)</li><li><code>Xcode版本</code>：8.2</li><li><code>编译器</code>：Version 8.0.0 (at /usr/bin/clang)</li></ul><p><strong>编译JDK 11时：</strong></p><ul><li><code>操作系统</code>：macOS 10.15.4</li><li><code>boot JDK</code>：JDK 11.0.7 (build 11.0.7+8-LTS)</li><li><code>Xcode版本</code>：11.5</li><li><code>编译器</code>：Version 11.0.3 (at /usr/bin/clang)</li></ul><p>大家在编译时如果过程中有很多问题，大概率少软件没装，或者软件版本不匹配，不要轻易放弃，需要耐心自查一下。</p><hr><h2 id="下载jdk源码" tabindex="-1"><a class="header-anchor" href="#下载jdk源码" aria-hidden="true">#</a> 下载JDK源码</h2><p>下载<code>JDK</code>源码其实有两种方式。</p><h3 id="方式一-通过mercurial工具下载" tabindex="-1"><a class="header-anchor" href="#方式一-通过mercurial工具下载" aria-hidden="true">#</a> <strong>方式一：通过Mercurial工具下载</strong></h3><p><code>Mercurial</code>可以理解为和<code>Git</code>一样，是另外一种代码管理工具，安装好之后就有一个<code>hg</code>命令可用。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-cd8a19ba-e9f5-4a4a-a23c-17688f0f459d.png" alt=""></p><p>而<code>OpenJDK</code>的源码已经提前托管到<code>http://hg.openjdk.java.net/</code>。</p><p>因此，比如下载<code>JDK 8</code>，可直接<code>hg clone</code>一下就行，和<code>git clone</code>一样：</p><p><code>hg clone [http://hg.openjdk.java.net/jd...](https://link.segmentfault.com/?enc=Snt8gNbYV7nkV3etTe%2FGJw%3D%3D.7IrUNCuc0HOEyvjCiCBOPMEBJ09bjLifieJi0I7iwtuuIeYUdSfCkC9c4D7z9wdq) </code></p><p>同理，下载<code>JDK 11</code>：</p><p><code>hg clone [http://hg.openjdk.java.net/jd...](https://link.segmentfault.com/?enc=BnHqAYXzfRcVfPgGgo1yOw%3D%3D.011np6%2FiCLuojl%2FBtvROkTVXr0PSdMYcYpAg2WUIE045BEFIrbCNAD42vWwIUb3d) </code></p><p>但是这种方式下载速度不是很快。</p><h3 id="方式二-直接下载打包好的源码包" tabindex="-1"><a class="header-anchor" href="#方式二-直接下载打包好的源码包" aria-hidden="true">#</a> <strong>方式二：直接下载打包好的源码包</strong></h3><p>下载地址：<code>https://jdk.java.net/</code></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-1bbbb1f8-da01-46e1-a793-487a25193c68.png" alt=""></p><p>选择你想要的版本下载即可。</p><hr><h3 id="编译前的自动配置" tabindex="-1"><a class="header-anchor" href="#编译前的自动配置" aria-hidden="true">#</a> 编译前的自动配置</h3><p>源码包下载好，放到本地某个目录（建议路径纯英文，避免不必要的麻烦），解压之，然后进入源码根目录，执行：</p><p><code>sh configure </code></p><blockquote><p>当然这里运行的是默认配置项。</p></blockquote><p>这一步会进行一系列的自动配置工作，时间一般很快，最终如果能出现一下提示，那么很幸运，编译前的配置工作就完成了！</p><p>这里我给出我自己分别在配置<code>JDK 11</code>和<code>JDK 8</code>时候完成时的样子：</p><p><strong>配置JDK 8完成：</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-27593edc-03e2-4a42-baf3-ed5e5096b3cb.png" alt=""></p><p><strong>配置JDK 11完成：</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-8526d944-a36e-4d37-93a0-9ad4ad53f927.png" alt=""></p><p><strong>注：</strong> 如果这一步出错，大概率是某个软件环境未装，或者即使装了，但版本不匹配，控制台打印日志里一般是会提醒的。</p><p>比如我在配置<code>JDK 8</code>的时候，就遇到了一个<code>errof：GCC compiler is required</code>的问题：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-2957399f-6451-46dc-a003-76e5159265e9.png" alt=""></p><p>明明系统里已经有编译器，但还是报这个错误。通过后来修改 <code>jdk源码根目录/common/autoconf/generated-configure.sh</code>文件，将相关的两行代码注释后就配置通过了</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-ffa10d36-3a77-48aa-ae0c-d3daf67f9a19.png" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-a6f6e416-639e-4706-8b40-6152eb3cf85d.png" alt=""></p><p>配置完成，接下来开始执行真正的编译动作了！</p><hr><h2 id="真正的编译动作" tabindex="-1"><a class="header-anchor" href="#真正的编译动作" aria-hidden="true">#</a> 真正的编译动作</h2><p>我们这里进行的是全量编译，直接在我们下载的<code>JDK</code>源码根目录下执行如下命令即可：</p><p><code>make all </code></p><p>这一步编译需要一点时间，耐心等待一下即可。编译过程如果有错误，会终止编译，如果能看到如下两个画面，那么则恭喜你，自己编译<code>JDK</code>源码就已经通过了，可以搞一杯咖啡庆祝一下了。</p><p><strong>JDK 8编译完成：</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-89020f5a-0909-4c57-8c88-f655293a42a4.png" alt=""></p><p><strong>JDK 11编译完成：</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-993fac94-2473-4f3b-9737-959510d2fe98.png" alt=""></p><p>从两张图的对比可以看出，编译<code>JDK 8</code>和<code>JDK 11</code>完成时在输出上还是有区别的。时间上的区别很大程度上来源于<code>JDK 11</code>的编译机配置要高不少。</p><hr><h2 id="验证成果" tabindex="-1"><a class="header-anchor" href="#验证成果" aria-hidden="true">#</a> 验证成果</h2><p><code>JDK</code>源码编译完成之后肯定会产生和输出很多产物，这也是我们所迫不及待想看到的。</p><p>由于<code>JDK 8</code>和<code>JDK 11</code>的源码包组织结构并不一样，所以输出东西的内容和位置也有区别。我们一一来盘点一下。</p><h3 id="_1、jdk-8的编译输出" tabindex="-1"><a class="header-anchor" href="#_1、jdk-8的编译输出" aria-hidden="true">#</a> <strong>1、JDK 8的编译输出</strong></h3><p>编译完成，<code>build</code>目录下会生成一个<code>macosx-x86_64-normal-server-release</code>目录，所有的编译成果均位于其中。</p><p>首先，编译出来的<code>Java</code>可执行程序可以在如下目录里找到：</p><p><code>jdk源码根目录/build/macosx-x86_64-normal-server-release/jdk/bin</code></p><p>进入该目录后，可以输入<code>./java -version</code>命令验证：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-f02dff40-f27e-476c-998b-bd6cdb5d3559.png" alt=""></p><p>其次，编译生成的成品<code>JDK</code>套装，可以在目录</p><p><code>jdk源码根目录/build/macosx-x86_64-normal-server-release/images </code></p><p>下找到，如图所示：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-1c781d34-776e-4acc-8d2b-b34bc59fda61.png" alt=""></p><p>其中：</p><ul><li><code>j2sdk-image</code>：编译生成的JDK</li><li><code>j2re-image</code>：编译生成的JRE</li></ul><p>进入<code>j2sdk-image</code>目录会发现，里面的内容和我们平时从网络上下载的成品<code>JDK</code>内容一致。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-7b7f147e-58c9-4eb5-b407-b8984cd72e1d.png" alt=""></p><h3 id="_2、jdk-11的编译输出" tabindex="-1"><a class="header-anchor" href="#_2、jdk-11的编译输出" aria-hidden="true">#</a> <strong>2、JDK 11的编译输出</strong></h3><blockquote><p>JDK 11的源码目录组织方式和JDK 8本身就有区别，编译生成的产物和上面编译JDK 8的输出有一定区别，但也不大。</p></blockquote><p><code>JDK 11</code>编译完成，同样在<code>build</code>目录下会生成一个<code>macosx-x86_64-normal-server-release</code>目录，所有的编译成果均位于其中。</p><p>同样编译出来的Java可执行程序可以在目录</p><p><code>JDK源码根目录/build/macosx-x86_64-normal-server-release/jdk/bin</code></p><p>下看到，进入该目录后，也可以输入<code>./java -version</code>命令验证：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-f9b55425-f308-44e8-8812-ac59b2707c81.png" alt=""></p><p>其次，编译生成的成品<code>JDK 11</code>套装，可以在目录</p><p><code>JDK源码根目录/build/macosx-x86_64-normal-server-release/images </code></p><p>下找到，如图所示：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-4e96858f-f681-4498-b1c4-282d317a6a32.png" alt=""></p><p>其中<code>jdk</code>目录就是编译生成的成品<code>JDK 11</code>套装。</p><hr><h2 id="使用自己编译的jdk" tabindex="-1"><a class="header-anchor" href="#使用自己编译的jdk" aria-hidden="true">#</a> 使用自己编译的JDK</h2><p>既然我们已经动手编译出了<code>JDK</code>成品，接下来我们得用上哇。</p><p>新建一个最最基本的<code>Java</code>工程，比如命名为<code>JdkTest</code>，目的是把我们自己编译出的<code>JDK</code>给用上。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-2cf54b29-9b7e-46b2-8cde-4c36960aa09b.png" alt=""></p><p>我们点开<code>Project Structure</code>，选到<code>SDKs</code>选项，新添加上自己刚刚编译生成的JDK，并选为项目的JDK，看看是否能正常工作</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-ad8023d0-fbb7-48b1-856e-a8818677a0a5.png" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-b8d87f09-6178-44c7-9572-a2852e81318d.png" alt=""></p><p>点击确定之后，我们运行之：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-3164cf31-8078-46d7-bee0-22e05b0c08de.png" alt=""></p><p>可以看到我们自己编译出的JDK已经用上了。</p><hr><h2 id="关联jdk源码并修改" tabindex="-1"><a class="header-anchor" href="#关联jdk源码并修改" aria-hidden="true">#</a> 关联JDK源码并修改</h2><p>我们继续在上一步<code>JdkTest</code>项目的<code>Project Structure</code> → <code>SDKs</code>里将<code>JDK</code>源码关联到自行下载的JDK源码路径上：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-129ede68-c368-461e-92d6-38a8e5dee344.png" alt=""></p><p>这样方便我们对自己下载的<code>JDK源码</code>进行<strong>阅读</strong>、<strong>调试</strong>、<strong>修改</strong>、以及在源码里随意<strong>做笔记</strong>和<strong>加注释</strong>。</p><p>举个最简单的例子，比如我们打开<code>System.out.println()</code>这个函数的底层源码：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-c406b2a2-208a-4a54-a869-b3f526e93ccd.png" alt=""></p><p>我们随便给它修改一下，加两行简单的标记，像这样：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-2a46b215-04e5-458a-b475-4dc31d7fe326.png" alt=""></p><p>为了使我们新加的代码行生效，我们必须要重新去JDK源码的根目录中再次执行 <code>make images</code>重新编译生成JDK方可生效：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-fd3cf88d-007e-4615-99b5-a3499c35ef40.png" alt=""></p><p>因为之前已经全量编译过了，所以再次<code>make</code>的时候增量编译一般很快。</p><p>重新编译之后，我们再次运行<code>JdkTest</code>项目，就可以看到改动的效果了：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-33dc0de6-2690-4ba2-9fe7-0e450c44c07b.png" alt=""></p><hr><h2 id="多行注释的问题" tabindex="-1"><a class="header-anchor" href="#多行注释的问题" aria-hidden="true">#</a> 多行注释的问题</h2><p>记得之前搭建<a href="https://link.segmentfault.com/?enc=JrtwTM%2BhTi%2B7DiRtBYeZSQ%3D%3D.T2U2BwPhK3iqeNk%2B%2BMuGttrqlD2zy9v1C%2BqYPvIYEvcvkTe1xyPrnnb%2FdaTGkBqY" target="_blank" rel="noopener noreferrer">《JDK源码阅读环境》<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>时，大家可能发现了一个问题：阅读源码嘛，给源代码做点注释或笔记很常见！但那时候有个问题就是做注释时<strong>不可改变代码的行结构</strong>（只能行尾注释，不能跨行注释），否则debug调试时会出现<strong>行号错位</strong>的问题。</p><p>原因很简单，因为我们虽然做了源代码目录的映射，但是实际支撑运行的<code>JDK</code>还是预先安装好的那个JDK环境，并不是根据我们修改后的源码来重新编译构建的，所以看到这里，解决这个问题就很简单，就像上面一样自行编译一下<code>JDK</code>即可。</p><p>实际在实验时，还有一个很典型的问题是，当添加了多行的中文注释后，再编译居然会报错！</p><p>比如，还是以上面例子中最简单的<code>System.out.println()</code>源码为例，我们添加几行中文注释：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-d6a44833-b908-4824-8862-1679bfdddfa3.png" alt=""></p><p>这时候我们去JDK源码目录下编译会发现满屏类似这样的报错：</p><blockquote><p>错误: 编码 ascii 的不可映射字符</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-ad0ca5a3-36c7-477d-bd58-d6731a87d762.png" alt=""></p><p>顿时有点懵，毕竟仅仅是加了几行注释。对于我们来说，源码里写点多行的中文注释基本是<strong>刚需</strong>，然而编译竟会报错，这还能不能让人愉快的玩耍了... 当时后背有点发凉。</p><p>实不相瞒，就这个问题排查了一段时间，熬到了很晚。最终折腾了一番，通过如下这种方式解决了，顺便分享给小伙伴们，大家如果遇到了这个问题，可以参考着解决一下。</p><p>因为从控制台的报错可以很明显的看出，肯定是字符编码相关的问题导致的，而且都指向了<code>ascii</code>这种编码方式。</p><p>于是将JDK的源码从根目录导入了Vs Code，然后全目录查找<code>encoding ascii</code>相关的内容，看看有没有什么端倪，结果发现</p><p><code>jdk源码根目录/make/common/SetupJavaCompilers.gmk</code>文件中有两处指定了<code>ascii</code>相关的编码方式：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-a86933af-f6d5-4d45-b4ca-33069a212c52.png" alt=""></p><p>于是尝试将这两处<code>-encoding ascii</code>的均替换成<code>-encoding utf-8</code>：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-c8117faf-d027-48d3-869b-32d0e98e8372.png" alt=""></p><p>然后再次执行<code>make images</code>编译，编译顺利通过！</p><p>至此大功告成！</p><p>这样后面不管是<strong>阅读</strong>、<strong>调试</strong>还是<strong>定制</strong><code>JDK</code>源码都非常方便了。</p><hr><p>引用链接：https://segmentfault.com/a/1190000023251649</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/jvm/compile-jdk.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 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clickable"><!----><span class="title">2.1 Java概述</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.2 Java基础语法</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.3 面向对象编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.4 字符串&amp;数组</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.5 集合框架（容器）</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.6 IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.11 并发编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">2.12 JVM</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/jvm/what-is-jvm.html" class="nav-link sidebar-link sidebar-page" aria-label="JVM到底是什么？"><!---->JVM到底是什么？<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/how-run-java-code.html" class="nav-link sidebar-link sidebar-page" aria-label="JVM到底是如何运行Java代码的"><!---->JVM到底是如何运行Java代码的<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/class-load.html" class="nav-link sidebar-link sidebar-page" aria-label="类加载机制"><!---->类加载机制<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a 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class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/asm.html" class="nav-link sidebar-link sidebar-page" aria-label="史上最通俗易懂的ASM教程"><!---->史上最通俗易懂的ASM教程<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/jvm/compile-jdk.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="自己编译JDK"><!---->自己编译JDK<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/compile-jdk.html#环境准备" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="环境准备"><!---->环境准备<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/compile-jdk.html#_1、boot-jdk" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="1、boot JDK"><!---->1、boot JDK<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/compile-jdk.html#_2、unix环境" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="2、Unix环境"><!---->2、Unix环境<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/compile-jdk.html#_3、编译器-编译工具链" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="3、编译器/编译工具链"><!---->3、编译器/编译工具链<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/compile-jdk.html#_4、其他工具" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="4、其他工具"><!---->4、其他工具<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/compile-jdk.html#下载jdk源码" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="下载JDK源码"><!---->下载JDK源码<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/compile-jdk.html#方式一-通过mercurial工具下载" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="方式一：通过Mercurial工具下载"><!---->方式一：通过Mercurial工具下载<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/compile-jdk.html#方式二-直接下载打包好的源码包" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="方式二：直接下载打包好的源码包"><!---->方式二：直接下载打包好的源码包<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/compile-jdk.html#编译前的自动配置" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="编译前的自动配置"><!---->编译前的自动配置<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/compile-jdk.html#真正的编译动作" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="真正的编译动作"><!---->真正的编译动作<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/compile-jdk.html#验证成果" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="验证成果"><!---->验证成果<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/compile-jdk.html#_1、jdk-8的编译输出" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="1、JDK 8的编译输出"><!---->1、JDK 8的编译输出<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/compile-jdk.html#_2、jdk-11的编译输出" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="2、JDK 11的编译输出"><!---->2、JDK 11的编译输出<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/compile-jdk.html#使用自己编译的jdk" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="使用自己编译的JDK"><!---->使用自己编译的JDK<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/compile-jdk.html#关联jdk源码并修改" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="关联JDK源码并修改"><!---->关联JDK源码并修改<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/compile-jdk.html#多行注释的问题" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="多行注释的问题"><!---->多行注释的问题<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/jvm/neicun-jiegou.html" class="nav-link sidebar-link sidebar-page" aria-label="深入理解JVM的内存结构"><!---->深入理解JVM的内存结构<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/whereis-the-object.html" class="nav-link sidebar-link sidebar-page" aria-label="Java 创建的对象到底放在哪"><!---->Java 创建的对象到底放在哪<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/gc.html" class="nav-link sidebar-link sidebar-page" aria-label="从头到尾说一次Java垃圾回收"><!---->从头到尾说一次Java垃圾回收<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/tujie-gc.html" class="nav-link sidebar-link sidebar-page" aria-label="图解Java的垃圾回收机制"><!---->图解Java的垃圾回收机制<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/problem-tools.html" class="nav-link sidebar-link sidebar-page" aria-label="Java问题诊断和排查工具"><!---->Java问题诊断和排查工具<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/jit.html" class="nav-link sidebar-link sidebar-page" aria-label="JIT原理解析及实践"><!---->JIT原理解析及实践<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/oom.html" class="nav-link sidebar-link sidebar-page" aria-label="内存溢出排查优化实战"><!---->内存溢出排查优化实战<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/cpu-percent-100.html" class="nav-link sidebar-link sidebar-page" aria-label="CPU 100% 排查优化实践"><!---->CPU 100% 排查优化实践<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/zongjie.html" class="nav-link sidebar-link sidebar-page" aria-label="JVM 核心知识点总结"><!---->JVM 核心知识点总结<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->自己编译JDK</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月27日</span><meta property="datePublished" content="2022-03-27T04:07:13.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 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aria-current="page" href="/jvm/compile-jdk.html#_1、boot-jdk" class="router-link-active router-link-exact-active toc-link level3">1、boot JDK</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/compile-jdk.html#_2、unix环境" class="router-link-active router-link-exact-active toc-link level3">2、Unix环境</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/compile-jdk.html#_3、编译器-编译工具链" class="router-link-active router-link-exact-active toc-link level3">3、编译器/编译工具链</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/compile-jdk.html#_4、其他工具" class="router-link-active router-link-exact-active toc-link level3">4、其他工具</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/compile-jdk.html#下载jdk源码" class="router-link-active router-link-exact-active toc-link level2">下载JDK源码</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/compile-jdk.html#方式一-通过mercurial工具下载" class="router-link-active router-link-exact-active toc-link level3">方式一：通过Mercurial工具下载</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/compile-jdk.html#方式二-直接下载打包好的源码包" class="router-link-active router-link-exact-active toc-link level3">方式二：直接下载打包好的源码包</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/compile-jdk.html#编译前的自动配置" class="router-link-active router-link-exact-active toc-link level3">编译前的自动配置</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/compile-jdk.html#真正的编译动作" class="router-link-active router-link-exact-active toc-link level2">真正的编译动作</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/compile-jdk.html#验证成果" class="router-link-active router-link-exact-active toc-link level2">验证成果</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/compile-jdk.html#_1、jdk-8的编译输出" class="router-link-active router-link-exact-active toc-link level3">1、JDK 8的编译输出</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/compile-jdk.html#_2、jdk-11的编译输出" class="router-link-active router-link-exact-active toc-link level3">2、JDK 11的编译输出</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/compile-jdk.html#使用自己编译的jdk" class="router-link-active router-link-exact-active toc-link level2">使用自己编译的JDK</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/compile-jdk.html#关联jdk源码并修改" class="router-link-active router-link-exact-active toc-link level2">关联JDK源码并修改</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/compile-jdk.html#多行注释的问题" class="router-link-active router-link-exact-active toc-link level2">多行注释的问题</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="自己编译jdk" tabindex="-1"><a class="header-anchor" href="#自己编译jdk" aria-hidden="true">#</a> 自己编译JDK</h1><p>引用链接：https://segmentfault.com/a/1190000023251649</p><p>很多小伙伴们做<code>Java</code>开发，天天写<code>Java</code>代码，肯定离不开<code>Java</code>基础环境：<code>JDK</code>，毕竟我们写好的<code>Java</code>代码也是跑在<code>JVM</code>虚拟机上。</p><p>一般来说，我们学<code>Java</code>之前，第一步就是安装<code>JDK</code>环境。这个简单啊，我们一般直接把<code>JDK</code>从官网下载下来，安装完成，配个环境变量就可以愉快地使用了。</p><p>不过话说回来，对于这个天天使用的东西，我们难道不好奇这玩意儿它到底是怎么由源码编译出来的吗？</p><p>带着这个原始的疑问，今天准备大干一场，自己动动呆萌的小手，来编译一个属于自己的<code>JDK</code>吧！</p><h2 id="环境准备" tabindex="-1"><a class="header-anchor" href="#环境准备" aria-hidden="true">#</a> 环境准备</h2><blockquote><p>首选说在前面的是，编译前的软件版本关系极其重要，自己在踩坑时，所出现的各种奇奇怪怪的问题几乎都和这个有关，后来版本匹配之后，就非常顺利了。</p></blockquote><p>我们来<strong>盘点和梳理</strong>一下编译一个JDK需要哪些环境和工具：</p><h3 id="_1、boot-jdk" tabindex="-1"><a class="header-anchor" href="#_1、boot-jdk" aria-hidden="true">#</a> <strong>1、boot JDK</strong></h3><p>我们要想编译<code>JDK</code>，首先自己本机必须提前已经安装有一个<code>JDK</code>，官方称之为<code>bootstrap JDK</code>（或者称为<code>boot JDK</code>）。</p><p>比如想编译<code>JDK 8</code>，那本机必须最起码得有一个<code>JDK 7</code>或者更新一点的版本；你想编译<code>JDK 11</code>，那就要求本机必须装有<code>JDK 10</code>或者<code>11</code>。</p><blockquote><p>所以鸡生蛋、蛋生鸡又来了...</p></blockquote><h3 id="_2、unix环境" tabindex="-1"><a class="header-anchor" href="#_2、unix环境" aria-hidden="true">#</a> <strong>2、Unix环境</strong></h3><p>编译<code>JDK</code>需要<code>Unix</code>环境的支持！</p><p>这一点在<code>Linux</code>操作系统和<code>macOS</code>操作系统上已经天然的保证了，而对于<code>Windows</code>兄弟来说稍微麻烦一点，需要通过使用<code>Cygwin</code>或者<code>MinGW/MSYS</code>这种软件来模拟。</p><p>就像官方所说：在<code>Linux</code>平台编译<code>JDK</code>一般问题最少，容易成功；<code>macOS</code>次之；<code>Windows</code>上则需要稍微多花点精力，问题可能也多一些。</p><p>究其本质原因，还是因为<code>Windows</code>毕竟不是一个<code>Unix-Like</code>内核的系统，毕竟很多软件的原始编译都离不开<code>Unix Toolkit</code>，所以相对肯定要麻烦一些。</p><h3 id="_3、编译器-编译工具链" tabindex="-1"><a class="header-anchor" href="#_3、编译器-编译工具链" aria-hidden="true">#</a> <strong>3、编译器/编译工具链</strong></h3><p><code>JDK</code>底层源码（尤其<code>JVM</code>虚拟机部分）很多都是<code>C++/C</code>写的，所以相关编译器也跑不掉。</p><p>一图胜千言，各平台上的编译器支持如下表所示，按平台选择即可：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-3b66d5b6-272f-47bd-88f7-47146a06ef06.png" alt=""></p><h3 id="_4、其他工具" tabindex="-1"><a class="header-anchor" href="#_4、其他工具" aria-hidden="true">#</a> <strong>4、其他工具</strong></h3><p>典型的比如：</p><ul><li><code>Autoconf</code>：软件源码包的自动配置工具</li><li><code>Make</code>：编译构建工具</li><li><code>freetype</code>：一个免费的渲染库，<code>JDK</code>图形化部分的代码可能会用它</li></ul><p>好，环境盘点就到这里，接下来具体列一下我在编译<code>JDK 8</code>和<code>JDK 11</code>时分别用到的软件详细版本信息：</p><p><strong>编译JDK 8时：</strong></p><ul><li><code>操作系统</code>：macOS 10.11.6</li><li><code>boot JDK</code>：JDK 1.8.0 (build 1.8.0_201-b09)</li><li><code>Xcode版本</code>：8.2</li><li><code>编译器</code>：Version 8.0.0 (at /usr/bin/clang)</li></ul><p><strong>编译JDK 11时：</strong></p><ul><li><code>操作系统</code>：macOS 10.15.4</li><li><code>boot JDK</code>：JDK 11.0.7 (build 11.0.7+8-LTS)</li><li><code>Xcode版本</code>：11.5</li><li><code>编译器</code>：Version 11.0.3 (at /usr/bin/clang)</li></ul><p>大家在编译时如果过程中有很多问题，大概率少软件没装，或者软件版本不匹配，不要轻易放弃，需要耐心自查一下。</p><hr><h2 id="下载jdk源码" tabindex="-1"><a class="header-anchor" href="#下载jdk源码" aria-hidden="true">#</a> 下载JDK源码</h2><p>下载<code>JDK</code>源码其实有两种方式。</p><h3 id="方式一-通过mercurial工具下载" tabindex="-1"><a class="header-anchor" href="#方式一-通过mercurial工具下载" aria-hidden="true">#</a> <strong>方式一：通过Mercurial工具下载</strong></h3><p><code>Mercurial</code>可以理解为和<code>Git</code>一样，是另外一种代码管理工具，安装好之后就有一个<code>hg</code>命令可用。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-cd8a19ba-e9f5-4a4a-a23c-17688f0f459d.png" alt=""></p><p>而<code>OpenJDK</code>的源码已经提前托管到<code>http://hg.openjdk.java.net/</code>。</p><p>因此，比如下载<code>JDK 8</code>，可直接<code>hg clone</code>一下就行，和<code>git clone</code>一样：</p><p><code>hg clone [http://hg.openjdk.java.net/jd...](https://link.segmentfault.com/?enc=Snt8gNbYV7nkV3etTe%2FGJw%3D%3D.7IrUNCuc0HOEyvjCiCBOPMEBJ09bjLifieJi0I7iwtuuIeYUdSfCkC9c4D7z9wdq) </code></p><p>同理，下载<code>JDK 11</code>：</p><p><code>hg clone [http://hg.openjdk.java.net/jd...](https://link.segmentfault.com/?enc=BnHqAYXzfRcVfPgGgo1yOw%3D%3D.011np6%2FiCLuojl%2FBtvROkTVXr0PSdMYcYpAg2WUIE045BEFIrbCNAD42vWwIUb3d) </code></p><p>但是这种方式下载速度不是很快。</p><h3 id="方式二-直接下载打包好的源码包" tabindex="-1"><a class="header-anchor" href="#方式二-直接下载打包好的源码包" aria-hidden="true">#</a> <strong>方式二：直接下载打包好的源码包</strong></h3><p>下载地址：<code>https://jdk.java.net/</code></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-1bbbb1f8-da01-46e1-a793-487a25193c68.png" alt=""></p><p>选择你想要的版本下载即可。</p><hr><h3 id="编译前的自动配置" tabindex="-1"><a class="header-anchor" href="#编译前的自动配置" aria-hidden="true">#</a> 编译前的自动配置</h3><p>源码包下载好，放到本地某个目录（建议路径纯英文，避免不必要的麻烦），解压之，然后进入源码根目录，执行：</p><p><code>sh configure </code></p><blockquote><p>当然这里运行的是默认配置项。</p></blockquote><p>这一步会进行一系列的自动配置工作，时间一般很快，最终如果能出现一下提示，那么很幸运，编译前的配置工作就完成了！</p><p>这里我给出我自己分别在配置<code>JDK 11</code>和<code>JDK 8</code>时候完成时的样子：</p><p><strong>配置JDK 8完成：</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-27593edc-03e2-4a42-baf3-ed5e5096b3cb.png" alt=""></p><p><strong>配置JDK 11完成：</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-8526d944-a36e-4d37-93a0-9ad4ad53f927.png" alt=""></p><p><strong>注：</strong> 如果这一步出错，大概率是某个软件环境未装，或者即使装了，但版本不匹配，控制台打印日志里一般是会提醒的。</p><p>比如我在配置<code>JDK 8</code>的时候，就遇到了一个<code>errof：GCC compiler is required</code>的问题：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-2957399f-6451-46dc-a003-76e5159265e9.png" alt=""></p><p>明明系统里已经有编译器，但还是报这个错误。通过后来修改 <code>jdk源码根目录/common/autoconf/generated-configure.sh</code>文件，将相关的两行代码注释后就配置通过了</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-ffa10d36-3a77-48aa-ae0c-d3daf67f9a19.png" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-a6f6e416-639e-4706-8b40-6152eb3cf85d.png" alt=""></p><p>配置完成，接下来开始执行真正的编译动作了！</p><hr><h2 id="真正的编译动作" tabindex="-1"><a class="header-anchor" href="#真正的编译动作" aria-hidden="true">#</a> 真正的编译动作</h2><p>我们这里进行的是全量编译，直接在我们下载的<code>JDK</code>源码根目录下执行如下命令即可：</p><p><code>make all </code></p><p>这一步编译需要一点时间，耐心等待一下即可。编译过程如果有错误，会终止编译，如果能看到如下两个画面，那么则恭喜你，自己编译<code>JDK</code>源码就已经通过了，可以搞一杯咖啡庆祝一下了。</p><p><strong>JDK 8编译完成：</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-89020f5a-0909-4c57-8c88-f655293a42a4.png" alt=""></p><p><strong>JDK 11编译完成：</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-993fac94-2473-4f3b-9737-959510d2fe98.png" alt=""></p><p>从两张图的对比可以看出，编译<code>JDK 8</code>和<code>JDK 11</code>完成时在输出上还是有区别的。时间上的区别很大程度上来源于<code>JDK 11</code>的编译机配置要高不少。</p><hr><h2 id="验证成果" tabindex="-1"><a class="header-anchor" href="#验证成果" aria-hidden="true">#</a> 验证成果</h2><p><code>JDK</code>源码编译完成之后肯定会产生和输出很多产物，这也是我们所迫不及待想看到的。</p><p>由于<code>JDK 8</code>和<code>JDK 11</code>的源码包组织结构并不一样，所以输出东西的内容和位置也有区别。我们一一来盘点一下。</p><h3 id="_1、jdk-8的编译输出" tabindex="-1"><a class="header-anchor" href="#_1、jdk-8的编译输出" aria-hidden="true">#</a> <strong>1、JDK 8的编译输出</strong></h3><p>编译完成，<code>build</code>目录下会生成一个<code>macosx-x86_64-normal-server-release</code>目录，所有的编译成果均位于其中。</p><p>首先，编译出来的<code>Java</code>可执行程序可以在如下目录里找到：</p><p><code>jdk源码根目录/build/macosx-x86_64-normal-server-release/jdk/bin</code></p><p>进入该目录后，可以输入<code>./java -version</code>命令验证：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-f02dff40-f27e-476c-998b-bd6cdb5d3559.png" alt=""></p><p>其次，编译生成的成品<code>JDK</code>套装，可以在目录</p><p><code>jdk源码根目录/build/macosx-x86_64-normal-server-release/images </code></p><p>下找到，如图所示：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-1c781d34-776e-4acc-8d2b-b34bc59fda61.png" alt=""></p><p>其中：</p><ul><li><code>j2sdk-image</code>：编译生成的JDK</li><li><code>j2re-image</code>：编译生成的JRE</li></ul><p>进入<code>j2sdk-image</code>目录会发现，里面的内容和我们平时从网络上下载的成品<code>JDK</code>内容一致。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-7b7f147e-58c9-4eb5-b407-b8984cd72e1d.png" alt=""></p><h3 id="_2、jdk-11的编译输出" tabindex="-1"><a class="header-anchor" href="#_2、jdk-11的编译输出" aria-hidden="true">#</a> <strong>2、JDK 11的编译输出</strong></h3><blockquote><p>JDK 11的源码目录组织方式和JDK 8本身就有区别，编译生成的产物和上面编译JDK 8的输出有一定区别，但也不大。</p></blockquote><p><code>JDK 11</code>编译完成，同样在<code>build</code>目录下会生成一个<code>macosx-x86_64-normal-server-release</code>目录，所有的编译成果均位于其中。</p><p>同样编译出来的Java可执行程序可以在目录</p><p><code>JDK源码根目录/build/macosx-x86_64-normal-server-release/jdk/bin</code></p><p>下看到，进入该目录后，也可以输入<code>./java -version</code>命令验证：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-f9b55425-f308-44e8-8812-ac59b2707c81.png" alt=""></p><p>其次，编译生成的成品<code>JDK 11</code>套装，可以在目录</p><p><code>JDK源码根目录/build/macosx-x86_64-normal-server-release/images </code></p><p>下找到，如图所示：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-4e96858f-f681-4498-b1c4-282d317a6a32.png" alt=""></p><p>其中<code>jdk</code>目录就是编译生成的成品<code>JDK 11</code>套装。</p><hr><h2 id="使用自己编译的jdk" tabindex="-1"><a class="header-anchor" href="#使用自己编译的jdk" aria-hidden="true">#</a> 使用自己编译的JDK</h2><p>既然我们已经动手编译出了<code>JDK</code>成品，接下来我们得用上哇。</p><p>新建一个最最基本的<code>Java</code>工程，比如命名为<code>JdkTest</code>，目的是把我们自己编译出的<code>JDK</code>给用上。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-2cf54b29-9b7e-46b2-8cde-4c36960aa09b.png" alt=""></p><p>我们点开<code>Project Structure</code>，选到<code>SDKs</code>选项，新添加上自己刚刚编译生成的JDK，并选为项目的JDK，看看是否能正常工作</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-ad8023d0-fbb7-48b1-856e-a8818677a0a5.png" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-b8d87f09-6178-44c7-9572-a2852e81318d.png" alt=""></p><p>点击确定之后，我们运行之：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-3164cf31-8078-46d7-bee0-22e05b0c08de.png" alt=""></p><p>可以看到我们自己编译出的JDK已经用上了。</p><hr><h2 id="关联jdk源码并修改" tabindex="-1"><a class="header-anchor" href="#关联jdk源码并修改" aria-hidden="true">#</a> 关联JDK源码并修改</h2><p>我们继续在上一步<code>JdkTest</code>项目的<code>Project Structure</code> → <code>SDKs</code>里将<code>JDK</code>源码关联到自行下载的JDK源码路径上：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-129ede68-c368-461e-92d6-38a8e5dee344.png" alt=""></p><p>这样方便我们对自己下载的<code>JDK源码</code>进行<strong>阅读</strong>、<strong>调试</strong>、<strong>修改</strong>、以及在源码里随意<strong>做笔记</strong>和<strong>加注释</strong>。</p><p>举个最简单的例子，比如我们打开<code>System.out.println()</code>这个函数的底层源码：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-c406b2a2-208a-4a54-a869-b3f526e93ccd.png" alt=""></p><p>我们随便给它修改一下，加两行简单的标记，像这样：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-2a46b215-04e5-458a-b475-4dc31d7fe326.png" alt=""></p><p>为了使我们新加的代码行生效，我们必须要重新去JDK源码的根目录中再次执行 <code>make images</code>重新编译生成JDK方可生效：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-fd3cf88d-007e-4615-99b5-a3499c35ef40.png" alt=""></p><p>因为之前已经全量编译过了，所以再次<code>make</code>的时候增量编译一般很快。</p><p>重新编译之后，我们再次运行<code>JdkTest</code>项目，就可以看到改动的效果了：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-33dc0de6-2690-4ba2-9fe7-0e450c44c07b.png" alt=""></p><hr><h2 id="多行注释的问题" tabindex="-1"><a class="header-anchor" href="#多行注释的问题" aria-hidden="true">#</a> 多行注释的问题</h2><p>记得之前搭建<a href="https://link.segmentfault.com/?enc=JrtwTM%2BhTi%2B7DiRtBYeZSQ%3D%3D.T2U2BwPhK3iqeNk%2B%2BMuGttrqlD2zy9v1C%2BqYPvIYEvcvkTe1xyPrnnb%2FdaTGkBqY" target="_blank" rel="noopener noreferrer">《JDK源码阅读环境》<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>时，大家可能发现了一个问题：阅读源码嘛，给源代码做点注释或笔记很常见！但那时候有个问题就是做注释时<strong>不可改变代码的行结构</strong>（只能行尾注释，不能跨行注释），否则debug调试时会出现<strong>行号错位</strong>的问题。</p><p>原因很简单，因为我们虽然做了源代码目录的映射，但是实际支撑运行的<code>JDK</code>还是预先安装好的那个JDK环境，并不是根据我们修改后的源码来重新编译构建的，所以看到这里，解决这个问题就很简单，就像上面一样自行编译一下<code>JDK</code>即可。</p><p>实际在实验时，还有一个很典型的问题是，当添加了多行的中文注释后，再编译居然会报错！</p><p>比如，还是以上面例子中最简单的<code>System.out.println()</code>源码为例，我们添加几行中文注释：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-d6a44833-b908-4824-8862-1679bfdddfa3.png" alt=""></p><p>这时候我们去JDK源码目录下编译会发现满屏类似这样的报错：</p><blockquote><p>错误: 编码 ascii 的不可映射字符</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-ad0ca5a3-36c7-477d-bd58-d6731a87d762.png" alt=""></p><p>顿时有点懵，毕竟仅仅是加了几行注释。对于我们来说，源码里写点多行的中文注释基本是<strong>刚需</strong>，然而编译竟会报错，这还能不能让人愉快的玩耍了... 当时后背有点发凉。</p><p>实不相瞒，就这个问题排查了一段时间，熬到了很晚。最终折腾了一番，通过如下这种方式解决了，顺便分享给小伙伴们，大家如果遇到了这个问题，可以参考着解决一下。</p><p>因为从控制台的报错可以很明显的看出，肯定是字符编码相关的问题导致的，而且都指向了<code>ascii</code>这种编码方式。</p><p>于是将JDK的源码从根目录导入了Vs Code，然后全目录查找<code>encoding ascii</code>相关的内容，看看有没有什么端倪，结果发现</p><p><code>jdk源码根目录/make/common/SetupJavaCompilers.gmk</code>文件中有两处指定了<code>ascii</code>相关的编码方式：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-a86933af-f6d5-4d45-b4ca-33069a212c52.png" alt=""></p><p>于是尝试将这两处<code>-encoding ascii</code>的均替换成<code>-encoding utf-8</code>：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/compile-jdk-c8117faf-d027-48d3-869b-32d0e98e8372.png" alt=""></p><p>然后再次执行<code>make images</code>编译，编译顺利通过！</p><p>至此大功告成！</p><p>这样后面不管是<strong>阅读</strong>、<strong>调试</strong>还是<strong>定制</strong><code>JDK</code>源码都非常方便了。</p><hr><p>引用链接：https://segmentfault.com/a/1190000023251649</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/jvm/compile-jdk.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 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class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/jvm/cpu-percent-100.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="CPU 100% 排查优化实践"><!---->CPU 100% 排查优化实践<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/cpu-percent-100.html#前言" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="前言"><!---->前言<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/cpu-percent-100.html#定位问题" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="定位问题"><!---->定位问题<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/cpu-percent-100.html#解决问题" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="解决问题"><!---->解决问题<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/cpu-percent-100.html#本地模拟" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="本地模拟"><!---->本地模拟<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/cpu-percent-100.html#优化解决" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="优化解决"><!---->优化解决<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/cpu-percent-100.html#总结" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="总结"><!---->总结<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/jvm/zongjie.html" class="nav-link sidebar-link sidebar-page" aria-label="JVM 核心知识点总结"><!---->JVM 核心知识点总结<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->一次生产CPU 100% 排查优化实践</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 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01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月28日</span><meta property="datePublished" content="2022-03-27T18:42:48.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 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content="PT6M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/cpu-percent-100.html#前言" class="router-link-active router-link-exact-active toc-link level2">前言</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/cpu-percent-100.html#定位问题" class="router-link-active router-link-exact-active toc-link level2">定位问题</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/cpu-percent-100.html#解决问题" class="router-link-active router-link-exact-active toc-link level2">解决问题</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/cpu-percent-100.html#本地模拟" class="router-link-active router-link-exact-active toc-link level3">本地模拟</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/cpu-percent-100.html#优化解决" class="router-link-active router-link-exact-active toc-link level3">优化解决</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/cpu-percent-100.html#总结" class="router-link-active router-link-exact-active toc-link level2">总结</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="一次生产cpu-100-排查优化实践" tabindex="-1"><a class="header-anchor" href="#一次生产cpu-100-排查优化实践" aria-hidden="true">#</a> 一次生产CPU 100% 排查优化实践</h1><h2 id="前言" tabindex="-1"><a class="header-anchor" href="#前言" aria-hidden="true">#</a> 前言</h2><p>最近又收到了运维报警：表示有些服务器负载非常高，让我们定位问题。</p><h2 id="定位问题" tabindex="-1"><a class="header-anchor" href="#定位问题" aria-hidden="true">#</a> 定位问题</h2><p>拿到问题后首先去服务器上看了看，发现运行的只有我们的 Java 应用。于是先用 <code>ps</code> 命令拿到了应用的 <code>PID</code>。</p><p>接着使用 <code>top -Hp pid</code> 将这个进程的线程显示出来。输入大写的 P 可以将线程按照 CPU 使用比例排序，于是得到以下结果。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/cpu-percent-100-e9b35104-fce9-40ea-ae91-8bbb7fd8aa96.jpg" alt=""></p><p>果然某些线程的 CPU 使用率非常高。</p><p>为了方便定位问题我立马使用 <code>jstack pid &gt; pid.log</code> 将线程栈 <code>dump</code> 到日志文件中。</p><p>我在上面 100% 的线程中随机选了一个 <code>pid=194283</code> 转换为 16 进制（2f6eb）后在线程快照中查询：</p><blockquote><p>因为线程快照中线程 ID 都是16进制存放。</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/cpu-percent-100-f8b051d5-f28d-481e-a0b2-e97151797e3b.jpg" alt=""></p><p>发现这是 <code>Disruptor</code> 的一个堆栈，前段时间正好解决过一个由于 Disruptor 队列引起的一次 <a href="">OOM</a>：<a href="https://crossoverjie.top/2018/08/29/java-senior/OOM-Disruptor/" target="_blank" rel="noopener noreferrer">强如 Disruptor 也发生内存溢出？<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><p>没想到又来一出。</p><p>为了更加直观的查看线程的状态信息，我将快照信息上传到专门分析的平台上。</p><p><a href="http://fastthread.io/" target="_blank" rel="noopener noreferrer">http://fastthread.io/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/cpu-percent-100-d6c9bc1c-9600-47f2-9ff1-d0c9bd8ef849.jpg" alt=""></p><p>其中有一项菜单展示了所有消耗 CPU 的线程，我仔细看了下发现几乎都是和上面的堆栈一样。</p><p>也就是说都是 <code>Disruptor</code> 队列的堆栈，同时都在执行 <code>java.lang.Thread.yield</code> 函数。</p><p>众所周知 <code>yield</code> 函数会让当前线程让出 <code>CPU</code> 资源，再让其他线程来竞争。</p><p>根据刚才的线程快照发现处于 <code>RUNNABLE</code> 状态并且都在执行 <code>yield</code> 函数的线程大概有 30几个。</p><p>因此初步判断为大量线程执行 <code>yield</code> 函数之后互相竞争导致 CPU 使用率增高，而通过对堆栈发现是和使用 <code>Disruptor</code> 有关。</p><h2 id="解决问题" tabindex="-1"><a class="header-anchor" href="#解决问题" aria-hidden="true">#</a> 解决问题</h2><p>而后我查看了代码，发现是根据每一个业务场景在内部都会使用 2 个 <code>Disruptor</code> 队列来解耦。</p><p>假设现在有 7 个业务类型，那就等于是创建 <code>2*7=14</code> 个 <code>Disruptor</code> 队列，同时每个队列有一个消费者，也就是总共有 14 个消费者（生产环境更多）。</p><p>同时发现配置的消费等待策略为 <code>YieldingWaitStrategy</code> 这种等待策略确实会执行 yield 来让出 CPU。</p><p>代码如下：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/cpu-percent-100-49840c0d-2c10-4bcb-80c6-1df7553ddb6c.jpg" alt=""></p><blockquote><p>初步看来和这个等待策略有很大的关系。</p></blockquote><h3 id="本地模拟" tabindex="-1"><a class="header-anchor" href="#本地模拟" aria-hidden="true">#</a> 本地模拟</h3><p>为了验证，我在本地创建了 15 个 <code>Disruptor</code> 队列同时结合监控观察 CPU 的使用情况。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/cpu-percent-100-7f3b2fa6-6505-4b67-9f42-0170a236832b.jpg" alt=""><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/cpu-percent-100-d597089d-54e0-49ef-a0f9-41798e84de48.jpg" alt=""></p><p>创建了 15 个 <code>Disruptor</code> 队列，同时每个队列都用线程池来往 <code>Disruptor队列</code> 里面发送 100W 条数据。</p><p>消费程序仅仅只是打印一下。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/cpu-percent-100-97b88b4d-2d81-47ab-9beb-830ac122c282.jpg" alt=""></p><p>跑了一段时间发现 CPU 使用率确实很高。</p><hr><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/cpu-percent-100-c0ee1da2-29af-4581-b0d8-97f6250401e7.jpg" alt=""></p><p>同时 <code>dump</code> 线程发现和生产的现象也是一致的：消费线程都处于 <code>RUNNABLE</code> 状态，同时都在执行 <code>yield</code>。</p><p>通过查询 <code>Disruptor</code> 官方文档发现：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/cpu-percent-100-de904a90-8b59-4333-82f5-9ec94a6525a0.jpg" alt=""></p><blockquote><p>YieldingWaitStrategy 是一种充分压榨 CPU 的策略，使用<code>自旋 + yield</code>的方式来提高性能。 当消费线程（Event Handler threads）的数量小于 CPU 核心数时推荐使用该策略。</p></blockquote><hr><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/cpu-percent-100-3faf6f7e-0d2c-4cfe-8e3a-07e15601485d.jpg" alt=""></p><p>同时查阅到其他的等待策略 <code>BlockingWaitStrategy</code> （也是默认的策略），它使用的是锁的机制，对 CPU 的使用率不高。</p><p>于是在和之前同样的条件下将等待策略换为 <code>BlockingWaitStrategy</code>。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/cpu-percent-100-12912ce3-a702-4bb2-a19b-816c22f7d43a.jpg" alt=""></p><hr><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/cpu-percent-100-b4aad83e-af9d-48fc-bcd0-ad2a42588179.jpg" alt=""><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/cpu-percent-100-56dc1513-8f10-422f-bb2a-ae5dcfb8413f.jpg" alt=""></p><p>和刚才的 CPU 对比会发现到后面使用率的会有明显的降低；同时 dump 线程后会发现大部分线程都处于 waiting 状态。</p><h3 id="优化解决" tabindex="-1"><a class="header-anchor" href="#优化解决" aria-hidden="true">#</a> 优化解决</h3><p>看样子将等待策略换为 <code>BlockingWaitStrategy</code> 可以减缓 CPU 的使用，</p><p>但留意到官方对 <code>YieldingWaitStrategy</code> 的描述里谈道： 当消费线程（Event Handler threads）的数量小于 CPU 核心数时推荐使用该策略。</p><p>而现有的使用场景很明显消费线程数已经大大的超过了核心 CPU 数了，因为我的使用方式是一个 <code>Disruptor</code> 队列一个消费者，所以我将队列调整为只有 1 个再试试(策略依然是 <code>YieldingWaitStrategy</code>)。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/cpu-percent-100-b1cbc2c2-828a-46e8-ba14-86cd0fa660c6.jpg" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/cpu-percent-100-f8fb7682-a61a-407d-923c-890a16bce109.jpg" alt=""></p><p>跑了一分钟，发现 CPU 的使用率一直都比较平稳而且不高。</p><h2 id="总结" tabindex="-1"><a class="header-anchor" href="#总结" aria-hidden="true">#</a> 总结</h2><p>所以排查到此可以有一个结论了，想要根本解决这个问题需要将我们现有的业务拆分；现在是一个应用里同时处理了 N 个业务，每个业务都会使用好几个 <code>Disruptor</code> 队列。</p><p>由于是在一台服务器上运行，所以 CPU 资源都是共享的，这就会导致 CPU 的使用率居高不下。</p><p>所以我们的调整方式如下：</p><ul><li>为了快速缓解这个问题，先将等待策略换为 <code>BlockingWaitStrategy</code>，可以有效降低 CPU 的使用率（业务上也还能接受）。</li><li>第二步就需要将应用拆分（上文模拟的一个 <code>Disruptor</code> 队列），一个应用处理一种业务类型；然后分别单独部署，这样也可以互相隔离互不影响。</li></ul><p>当然还有其他的一些优化，因为这也是一个老系统了，这次 dump 线程居然发现创建了 800+ 的线程。</p><p>创建线程池的方式也是核心线程数、最大线程数是一样的，导致一些空闲的线程也得不到回收；这样会有很多无意义的资源消耗。</p><p>所以也会结合业务将创建线程池的方式调整一下，将线程数降下来，尽量的物尽其用。</p><p>本文的演示代码已上传至 GitHub：</p><p><a href="https://github.com/crossoverJie/JCSprout/tree/master/src/main/java/com/crossoverjie/disruptor" target="_blank" rel="noopener noreferrer">https://github.com/crossoverJie/JCSprout<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><p><strong>你的点赞与分享是对我最大的支持</strong></p><p>原文链接：<a href="https://github.com/crossoverJie/JCSprout/blob/master/docs/jvm/cpu-percent-100.md" target="_blank" rel="noopener noreferrer">https://github.com/crossoverJie/JCSprout/blob/master/docs/jvm/cpu-percent-100.md<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 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href="/jvm/cpu-percent-100.html#前言" class="router-link-active router-link-exact-active toc-link level2">前言</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/cpu-percent-100.html#定位问题" class="router-link-active router-link-exact-active toc-link level2">定位问题</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/cpu-percent-100.html#解决问题" class="router-link-active router-link-exact-active toc-link level2">解决问题</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/cpu-percent-100.html#本地模拟" class="router-link-active router-link-exact-active toc-link level3">本地模拟</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/cpu-percent-100.html#优化解决" class="router-link-active router-link-exact-active toc-link level3">优化解决</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/cpu-percent-100.html#总结" class="router-link-active router-link-exact-active toc-link level2">总结</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="一次生产cpu-100-排查优化实践" tabindex="-1"><a class="header-anchor" href="#一次生产cpu-100-排查优化实践" aria-hidden="true">#</a> 一次生产CPU 100% 排查优化实践</h1><h2 id="前言" tabindex="-1"><a class="header-anchor" href="#前言" aria-hidden="true">#</a> 前言</h2><p>最近又收到了运维报警：表示有些服务器负载非常高，让我们定位问题。</p><h2 id="定位问题" tabindex="-1"><a class="header-anchor" href="#定位问题" aria-hidden="true">#</a> 定位问题</h2><p>拿到问题后首先去服务器上看了看，发现运行的只有我们的 Java 应用。于是先用 <code>ps</code> 命令拿到了应用的 <code>PID</code>。</p><p>接着使用 <code>top -Hp pid</code> 将这个进程的线程显示出来。输入大写的 P 可以将线程按照 CPU 使用比例排序，于是得到以下结果。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/cpu-percent-100-e9b35104-fce9-40ea-ae91-8bbb7fd8aa96.jpg" alt=""></p><p>果然某些线程的 CPU 使用率非常高。</p><p>为了方便定位问题我立马使用 <code>jstack pid &gt; pid.log</code> 将线程栈 <code>dump</code> 到日志文件中。</p><p>我在上面 100% 的线程中随机选了一个 <code>pid=194283</code> 转换为 16 进制（2f6eb）后在线程快照中查询：</p><blockquote><p>因为线程快照中线程 ID 都是16进制存放。</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/cpu-percent-100-f8b051d5-f28d-481e-a0b2-e97151797e3b.jpg" alt=""></p><p>发现这是 <code>Disruptor</code> 的一个堆栈，前段时间正好解决过一个由于 Disruptor 队列引起的一次 <a href="">OOM</a>：<a href="https://crossoverjie.top/2018/08/29/java-senior/OOM-Disruptor/" target="_blank" rel="noopener noreferrer">强如 Disruptor 也发生内存溢出？<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><p>没想到又来一出。</p><p>为了更加直观的查看线程的状态信息，我将快照信息上传到专门分析的平台上。</p><p><a href="http://fastthread.io/" target="_blank" rel="noopener noreferrer">http://fastthread.io/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/cpu-percent-100-d6c9bc1c-9600-47f2-9ff1-d0c9bd8ef849.jpg" alt=""></p><p>其中有一项菜单展示了所有消耗 CPU 的线程，我仔细看了下发现几乎都是和上面的堆栈一样。</p><p>也就是说都是 <code>Disruptor</code> 队列的堆栈，同时都在执行 <code>java.lang.Thread.yield</code> 函数。</p><p>众所周知 <code>yield</code> 函数会让当前线程让出 <code>CPU</code> 资源，再让其他线程来竞争。</p><p>根据刚才的线程快照发现处于 <code>RUNNABLE</code> 状态并且都在执行 <code>yield</code> 函数的线程大概有 30几个。</p><p>因此初步判断为大量线程执行 <code>yield</code> 函数之后互相竞争导致 CPU 使用率增高，而通过对堆栈发现是和使用 <code>Disruptor</code> 有关。</p><h2 id="解决问题" tabindex="-1"><a class="header-anchor" href="#解决问题" aria-hidden="true">#</a> 解决问题</h2><p>而后我查看了代码，发现是根据每一个业务场景在内部都会使用 2 个 <code>Disruptor</code> 队列来解耦。</p><p>假设现在有 7 个业务类型，那就等于是创建 <code>2*7=14</code> 个 <code>Disruptor</code> 队列，同时每个队列有一个消费者，也就是总共有 14 个消费者（生产环境更多）。</p><p>同时发现配置的消费等待策略为 <code>YieldingWaitStrategy</code> 这种等待策略确实会执行 yield 来让出 CPU。</p><p>代码如下：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/cpu-percent-100-49840c0d-2c10-4bcb-80c6-1df7553ddb6c.jpg" alt=""></p><blockquote><p>初步看来和这个等待策略有很大的关系。</p></blockquote><h3 id="本地模拟" tabindex="-1"><a class="header-anchor" href="#本地模拟" aria-hidden="true">#</a> 本地模拟</h3><p>为了验证，我在本地创建了 15 个 <code>Disruptor</code> 队列同时结合监控观察 CPU 的使用情况。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/cpu-percent-100-7f3b2fa6-6505-4b67-9f42-0170a236832b.jpg" alt=""><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/cpu-percent-100-d597089d-54e0-49ef-a0f9-41798e84de48.jpg" alt=""></p><p>创建了 15 个 <code>Disruptor</code> 队列，同时每个队列都用线程池来往 <code>Disruptor队列</code> 里面发送 100W 条数据。</p><p>消费程序仅仅只是打印一下。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/cpu-percent-100-97b88b4d-2d81-47ab-9beb-830ac122c282.jpg" alt=""></p><p>跑了一段时间发现 CPU 使用率确实很高。</p><hr><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/cpu-percent-100-c0ee1da2-29af-4581-b0d8-97f6250401e7.jpg" alt=""></p><p>同时 <code>dump</code> 线程发现和生产的现象也是一致的：消费线程都处于 <code>RUNNABLE</code> 状态，同时都在执行 <code>yield</code>。</p><p>通过查询 <code>Disruptor</code> 官方文档发现：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/cpu-percent-100-de904a90-8b59-4333-82f5-9ec94a6525a0.jpg" alt=""></p><blockquote><p>YieldingWaitStrategy 是一种充分压榨 CPU 的策略，使用<code>自旋 + yield</code>的方式来提高性能。 当消费线程（Event Handler threads）的数量小于 CPU 核心数时推荐使用该策略。</p></blockquote><hr><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/cpu-percent-100-3faf6f7e-0d2c-4cfe-8e3a-07e15601485d.jpg" alt=""></p><p>同时查阅到其他的等待策略 <code>BlockingWaitStrategy</code> （也是默认的策略），它使用的是锁的机制，对 CPU 的使用率不高。</p><p>于是在和之前同样的条件下将等待策略换为 <code>BlockingWaitStrategy</code>。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/cpu-percent-100-12912ce3-a702-4bb2-a19b-816c22f7d43a.jpg" alt=""></p><hr><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/cpu-percent-100-b4aad83e-af9d-48fc-bcd0-ad2a42588179.jpg" alt=""><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/cpu-percent-100-56dc1513-8f10-422f-bb2a-ae5dcfb8413f.jpg" alt=""></p><p>和刚才的 CPU 对比会发现到后面使用率的会有明显的降低；同时 dump 线程后会发现大部分线程都处于 waiting 状态。</p><h3 id="优化解决" tabindex="-1"><a class="header-anchor" href="#优化解决" aria-hidden="true">#</a> 优化解决</h3><p>看样子将等待策略换为 <code>BlockingWaitStrategy</code> 可以减缓 CPU 的使用，</p><p>但留意到官方对 <code>YieldingWaitStrategy</code> 的描述里谈道： 当消费线程（Event Handler threads）的数量小于 CPU 核心数时推荐使用该策略。</p><p>而现有的使用场景很明显消费线程数已经大大的超过了核心 CPU 数了，因为我的使用方式是一个 <code>Disruptor</code> 队列一个消费者，所以我将队列调整为只有 1 个再试试(策略依然是 <code>YieldingWaitStrategy</code>)。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/cpu-percent-100-b1cbc2c2-828a-46e8-ba14-86cd0fa660c6.jpg" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/cpu-percent-100-f8fb7682-a61a-407d-923c-890a16bce109.jpg" alt=""></p><p>跑了一分钟，发现 CPU 的使用率一直都比较平稳而且不高。</p><h2 id="总结" tabindex="-1"><a class="header-anchor" href="#总结" aria-hidden="true">#</a> 总结</h2><p>所以排查到此可以有一个结论了，想要根本解决这个问题需要将我们现有的业务拆分；现在是一个应用里同时处理了 N 个业务，每个业务都会使用好几个 <code>Disruptor</code> 队列。</p><p>由于是在一台服务器上运行，所以 CPU 资源都是共享的，这就会导致 CPU 的使用率居高不下。</p><p>所以我们的调整方式如下：</p><ul><li>为了快速缓解这个问题，先将等待策略换为 <code>BlockingWaitStrategy</code>，可以有效降低 CPU 的使用率（业务上也还能接受）。</li><li>第二步就需要将应用拆分（上文模拟的一个 <code>Disruptor</code> 队列），一个应用处理一种业务类型；然后分别单独部署，这样也可以互相隔离互不影响。</li></ul><p>当然还有其他的一些优化，因为这也是一个老系统了，这次 dump 线程居然发现创建了 800+ 的线程。</p><p>创建线程池的方式也是核心线程数、最大线程数是一样的，导致一些空闲的线程也得不到回收；这样会有很多无意义的资源消耗。</p><p>所以也会结合业务将创建线程池的方式调整一下，将线程数降下来，尽量的物尽其用。</p><p>本文的演示代码已上传至 GitHub：</p><p><a href="https://github.com/crossoverJie/JCSprout/tree/master/src/main/java/com/crossoverjie/disruptor" target="_blank" rel="noopener noreferrer">https://github.com/crossoverJie/JCSprout<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" 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创建的对象到底放在哪"><!---->Java 创建的对象到底放在哪<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/jvm/gc.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="从头到尾说一次Java垃圾回收"><!---->从头到尾说一次Java垃圾回收<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/gc.html#什么是垃圾回收" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="什么是垃圾回收"><!---->什么是垃圾回收<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/gc.html#怎么定义垃圾" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="怎么定义垃圾"><!---->怎么定义垃圾<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/gc.html#怎么回收垃圾" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="怎么回收垃圾"><!---->怎么回收垃圾<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/gc.html#内存模型与回收策略" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="内存模型与回收策略"><!---->内存模型与回收策略<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/jvm/tujie-gc.html" class="nav-link sidebar-link sidebar-page" aria-label="图解Java的垃圾回收机制"><!---->图解Java的垃圾回收机制<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/problem-tools.html" class="nav-link sidebar-link sidebar-page" aria-label="Java问题诊断和排查工具"><!---->Java问题诊断和排查工具<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/jit.html" class="nav-link sidebar-link sidebar-page" aria-label="JIT原理解析及实践"><!---->JIT原理解析及实践<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/oom.html" class="nav-link 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class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->咱们从头到尾说一次Java垃圾回收</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 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0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><li class="category category1" role>JVM</li><meta property="articleSection" content="Java核心,JVM"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 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19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 14 分钟</span><meta property="timeRequired" content="PT14M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/gc.html#什么是垃圾回收" class="router-link-active router-link-exact-active toc-link level3">什么是垃圾回收</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/gc.html#怎么定义垃圾" class="router-link-active router-link-exact-active toc-link level3">怎么定义垃圾</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/gc.html#怎么回收垃圾" class="router-link-active router-link-exact-active toc-link level3">怎么回收垃圾</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/gc.html#内存模型与回收策略" class="router-link-active router-link-exact-active toc-link level3">内存模型与回收策略</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="咱们从头到尾说一次java垃圾回收" tabindex="-1"><a class="header-anchor" href="#咱们从头到尾说一次java垃圾回收" aria-hidden="true">#</a> 咱们从头到尾说一次Java垃圾回收</h1><p>之前上学的时候有这个一个梗，说在食堂里吃饭，吃完把餐盘端走清理的，是 C++ 程序员，吃完直接就走的，是 Java 程序员。</p><p>确实，在 Java 的世界里，似乎我们不用对垃圾回收那么的专注，很多初学者不懂 GC，也依然能写出一个能用甚至还不错的程序或系统。但其实这并不代表 Java 的 GC 就不重要。相反，它是那么的重要和复杂，以至于出了问题，那些初学者除了打开 GC 日志，看着一堆0101的天文，啥也做不了。</p><p>今天我们就从头到尾完整地聊一聊 Java 的垃圾回收。</p><h3 id="什么是垃圾回收" tabindex="-1"><a class="header-anchor" href="#什么是垃圾回收" aria-hidden="true">#</a> 什么是垃圾回收</h3><ul><li>垃圾回收（Garbage Collection，GC），顾名思义就是释放垃圾占用的空间，防止内存泄露。有效的使用可以使用的内存，对内存堆中已经死亡的或者长时间没有使用的对象进行清除和回收。</li><li>Java 语言出来之前，大家都在拼命的写 C 或者 C++ 的程序，而此时存在一个很大的矛盾，C++ 等语言创建对象要不断的去开辟空间，不用的时候又需要不断的去释放控件，既要写构造函数，又要写析构函数，很多时候都在重复的 allocated，然后不停的析构。于是，有人就提出，能不能写一段程序实现这块功能，每次创建，释放控件的时候复用这段代码，而无需重复的书写呢？</li><li>1960年，基于 MIT 的 Lisp 首先提出了垃圾回收的概念，用于处理C语言等不停的析构操作，而这时 Java 还没有出世呢！所以实际上 GC 并不是Java的专利，GC 的历史远远大于 Java 的历史！</li></ul><h3 id="怎么定义垃圾" tabindex="-1"><a class="header-anchor" href="#怎么定义垃圾" aria-hidden="true">#</a> 怎么定义垃圾</h3><p>既然我们要做垃圾回收，首先我们得搞清楚垃圾的定义是什么，哪些内存是需要回收的。</p><p><strong>引用计数算法</strong> 引用计数算法（Reachability Counting）是通过在对象头中分配一个空间来保存该对象被引用的次数（Reference Count）。如果该对象被其它对象引用，则它的引用计数加1，如果删除对该对象的引用，那么它的引用计数就减1，当该对象的引用计数为0时，那么该对象就会被回收。</p><p><strong>String m = new String(&quot;jack&quot;);</strong></p><p>先创建一个字符串，这时候&quot;jack&quot;有一个引用，就是 m。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/gc-691109d2-bee4-4a79-8da6-87c5fd233f54.jpg" alt=""></p><p>然后将 m 设置为 null，这时候&quot;jack&quot;的引用次数就等于0了，在引用计数算法中，意味着这块内容就需要被回收了。</p><p><strong>m = null;</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/gc-74865618-4576-4f8b-baf3-17d6a71125b9.jpg" alt=""></p><p>引用计数算法是将垃圾回收分摊到整个应用程序的运行当中了，而不是在进行垃圾收集时，要挂起整个应用的运行，直到对堆中所有对象的处理都结束。因此，采用引用计数的垃圾收集不属于严格意义上的&quot;Stop-The-World&quot;的垃圾收集机制。</p><p>看似很美好，但我们知道JVM的垃圾回收就是&quot;Stop-The-World&quot;的，那是什么原因导致我们最终放弃了引用计数算法呢？看下面的例子。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">ReferenceCountingGC</span> <span class="token punctuation">{</span>
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100% 排查优化实践<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/zongjie.html" class="nav-link sidebar-link sidebar-page" aria-label="JVM 核心知识点总结"><!---->JVM 核心知识点总结<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->咱们从头到尾说一次Java垃圾回收</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 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142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 14 分钟</span><meta property="timeRequired" content="PT14M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/gc.html#什么是垃圾回收" class="router-link-active router-link-exact-active toc-link level3">什么是垃圾回收</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/gc.html#怎么定义垃圾" class="router-link-active router-link-exact-active toc-link level3">怎么定义垃圾</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/gc.html#怎么回收垃圾" class="router-link-active router-link-exact-active toc-link level3">怎么回收垃圾</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/gc.html#内存模型与回收策略" class="router-link-active router-link-exact-active toc-link level3">内存模型与回收策略</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="咱们从头到尾说一次java垃圾回收" tabindex="-1"><a class="header-anchor" href="#咱们从头到尾说一次java垃圾回收" aria-hidden="true">#</a> 咱们从头到尾说一次Java垃圾回收</h1><p>之前上学的时候有这个一个梗，说在食堂里吃饭，吃完把餐盘端走清理的，是 C++ 程序员，吃完直接就走的，是 Java 程序员。</p><p>确实，在 Java 的世界里，似乎我们不用对垃圾回收那么的专注，很多初学者不懂 GC，也依然能写出一个能用甚至还不错的程序或系统。但其实这并不代表 Java 的 GC 就不重要。相反，它是那么的重要和复杂，以至于出了问题，那些初学者除了打开 GC 日志，看着一堆0101的天文，啥也做不了。</p><p>今天我们就从头到尾完整地聊一聊 Java 的垃圾回收。</p><h3 id="什么是垃圾回收" tabindex="-1"><a class="header-anchor" href="#什么是垃圾回收" aria-hidden="true">#</a> 什么是垃圾回收</h3><ul><li>垃圾回收（Garbage Collection，GC），顾名思义就是释放垃圾占用的空间，防止内存泄露。有效的使用可以使用的内存，对内存堆中已经死亡的或者长时间没有使用的对象进行清除和回收。</li><li>Java 语言出来之前，大家都在拼命的写 C 或者 C++ 的程序，而此时存在一个很大的矛盾，C++ 等语言创建对象要不断的去开辟空间，不用的时候又需要不断的去释放控件，既要写构造函数，又要写析构函数，很多时候都在重复的 allocated，然后不停的析构。于是，有人就提出，能不能写一段程序实现这块功能，每次创建，释放控件的时候复用这段代码，而无需重复的书写呢？</li><li>1960年，基于 MIT 的 Lisp 首先提出了垃圾回收的概念，用于处理C语言等不停的析构操作，而这时 Java 还没有出世呢！所以实际上 GC 并不是Java的专利，GC 的历史远远大于 Java 的历史！</li></ul><h3 id="怎么定义垃圾" tabindex="-1"><a class="header-anchor" href="#怎么定义垃圾" aria-hidden="true">#</a> 怎么定义垃圾</h3><p>既然我们要做垃圾回收，首先我们得搞清楚垃圾的定义是什么，哪些内存是需要回收的。</p><p><strong>引用计数算法</strong> 引用计数算法（Reachability Counting）是通过在对象头中分配一个空间来保存该对象被引用的次数（Reference Count）。如果该对象被其它对象引用，则它的引用计数加1，如果删除对该对象的引用，那么它的引用计数就减1，当该对象的引用计数为0时，那么该对象就会被回收。</p><p><strong>String m = new String(&quot;jack&quot;);</strong></p><p>先创建一个字符串，这时候&quot;jack&quot;有一个引用，就是 m。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/gc-691109d2-bee4-4a79-8da6-87c5fd233f54.jpg" alt=""></p><p>然后将 m 设置为 null，这时候&quot;jack&quot;的引用次数就等于0了，在引用计数算法中，意味着这块内容就需要被回收了。</p><p><strong>m = null;</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/gc-74865618-4576-4f8b-baf3-17d6a71125b9.jpg" alt=""></p><p>引用计数算法是将垃圾回收分摊到整个应用程序的运行当中了，而不是在进行垃圾收集时，要挂起整个应用的运行，直到对堆中所有对象的处理都结束。因此，采用引用计数的垃圾收集不属于严格意义上的&quot;Stop-The-World&quot;的垃圾收集机制。</p><p>看似很美好，但我们知道JVM的垃圾回收就是&quot;Stop-The-World&quot;的，那是什么原因导致我们最终放弃了引用计数算法呢？看下面的例子。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">ReferenceCountingGC</span> <span class="token punctuation">{</span>
 
 <span class="token keyword">public</span> <span class="token class-name">Object</span> instance<span class="token punctuation">;</span>
 
@@ -88,6 +88,6 @@ s <span class="token operator">=</span> <span class="token keyword">null</span><
 s <span class="token operator">=</span> <span class="token keyword">null</span><span class="token punctuation">;</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>4、本地方法栈中引用的对象 任何 native 接口都会使用某种本地方法栈，实现的本地方法接口是使用 C 连接模型的话，那么它的本地方法栈就是 C 栈。当线程调用 Java 方法时，虚拟机会创建一个新的栈帧并压入 Java 栈。然而当它调用的是本地方法时，虚拟机会保持 Java 栈不变，不再在线程的 Java 栈中压入新的帧，虚拟机只是简单地动态连接并直接调用指定的本地方法。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/gc-a138a4b4-56cb-4d6f-a65a-7f4259977476.jpg" alt=""></p><h3 id="怎么回收垃圾" tabindex="-1"><a class="header-anchor" href="#怎么回收垃圾" aria-hidden="true">#</a> 怎么回收垃圾</h3><p>在确定了哪些垃圾可以被回收后，垃圾收集器要做的事情就是开始进行垃圾回收，但是这里面涉及到一个问题是：如何高效地进行垃圾回收。由于Java虚拟机规范并没有对如何实现垃圾收集器做出明确的规定，因此各个厂商的虚拟机可以采用不同的方式来实现垃圾收集器，这里我们讨论几种常见的垃圾收集算法的核心思想。</p><p><strong>标记 --- 清除算法</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/gc-2001e224-0f34-4429-bc89-a8fbe8ab271c.jpg" alt=""></p><p>标记清除算法（Mark-Sweep）是最基础的一种垃圾回收算法，它分为2部分，先把内存区域中的这些对象进行标记，哪些属于可回收标记出来，然后把这些垃圾拎出来清理掉。就像上图一样，清理掉的垃圾就变成未使用的内存区域，等待被再次使用。</p><p>这逻辑再清晰不过了，并且也很好操作，但它存在一个很大的问题，那就是内存碎片。</p><p>上图中等方块的假设是 2M，小一些的是 1M，大一些的是 4M。等我们回收完，内存就会切成了很多段。我们知道开辟内存空间时，需要的是连续的内存区域，这时候我们需要一个 2M的内存区域，其中有2个 1M 是没法用的。这样就导致，其实我们本身还有这么多的内存的，但却用不了。</p><p><strong>复制算法</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/gc-a2b15e6f-6921-4710-bf76-77858df38c27.jpg" alt=""></p><p>复制算法（Copying）是在标记清除算法上演化而来，解决标记清除算法的内存碎片问题。它将可用内存按容量划分为大小相等的两块，每次只使用其中的一块。当这一块的内存用完了，就将还存活着的对象复制到另外一块上面，然后再把已使用过的内存空间一次清理掉。保证了内存的连续可用，内存分配时也就不用考虑内存碎片等复杂情况，逻辑清晰，运行高效。</p><p>上面的图很清楚，也很明显的暴露了另一个问题，合着我这140平的大三房，只能当70平米的小两房来使？代价实在太高。</p><p><strong>标记整理算法</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/gc-2d47a225-ad9d-4f15-9b4d-7dce9a693adf.jpg" alt=""></p><p>标记整理算法（Mark-Compact）标记过程仍然与标记 --- 清除算法一样，但后续步骤不是直接对可回收对象进行清理，而是让所有存活的对象都向一端移动，再清理掉端边界以外的内存区域。</p><p>标记整理算法一方面在标记-清除算法上做了升级，解决了内存碎片的问题，也规避了复制算法只能利用一半内存区域的弊端。看起来很美好，但从上图可以看到，它对内存变动更频繁，需要整理所有存活对象的引用地址，在效率上比复制算法要差很多。</p><p>分代收集算法分代收集算法（Generational Collection）严格来说并不是一种思想或理论，而是融合上述3种基础的算法思想，而产生的针对不同情况所采用不同算法的一套组合拳。对象存活周期的不同将内存划分为几块。一般是把 Java 堆分为新生代和老年代，这样就可以根据各个年代的特点采用最适当的收集算法。在新生代中，每次垃圾收集时都发现有大批对象死去，只有少量存活，那就选用复制算法，只需要付出少量存活对象的复制成本就可以完成收集。而老年代中因为对象存活率高、没有额外空间对它进行分配担保，就必须使用标记-清理或者标记 --- 整理算法来进行回收。so，另一个问题来了，那内存区域到底被分为哪几块，每一块又有什么特别适合什么算法呢？</p><h3 id="内存模型与回收策略" tabindex="-1"><a class="header-anchor" href="#内存模型与回收策略" aria-hidden="true">#</a> 内存模型与回收策略</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/gc-59dddea1-b6bc-4fd4-bb79-d81adbdc7bed.jpg" alt=""></p><p>Java 堆（Java Heap）是JVM所管理的内存中最大的一块，堆又是垃圾收集器管理的主要区域，这里我们主要分析一下 Java 堆的结构。</p><p>Java 堆主要分为2个区域-年轻代与老年代，其中年轻代又分 Eden 区和 Survivor 区，其中 Survivor 区又分 From 和 To 2个区。可能这时候大家会有疑问，为什么需要 Survivor 区，为什么Survivor 还要分2个区。不着急，我们从头到尾，看看对象到底是怎么来的，而它又是怎么没的。</p><p><strong>Eden 区</strong></p><p>IBM 公司的专业研究表明，有将近98%的对象是朝生夕死，所以针对这一现状，大多数情况下，对象会在新生代 Eden 区中进行分配，当 Eden 区没有足够空间进行分配时，虚拟机会发起一次 Minor GC，Minor GC 相比 Major GC 更频繁，回收速度也更快。</p><p>通过 Minor GC 之后，Eden 会被清空，Eden 区中绝大部分对象会被回收，而那些无需回收的存活对象，将会进到 Survivor 的 From 区（若 From 区不够，则直接进入 Old 区）。</p><p><strong>Survivor 区</strong></p><p>Survivor 区相当于是 Eden 区和 Old 区的一个缓冲，类似于我们交通灯中的黄灯。Survivor 又分为2个区，一个是 From 区，一个是 To 区。每次执行 Minor GC，会将 Eden 区和 From 存活的对象放到 Survivor 的 To 区（如果 To 区不够，则直接进入 Old 区）。</p><p>1、为啥需要？</p><p>不就是新生代到老年代么，直接 Eden 到 Old 不好了吗，为啥要这么复杂。想想如果没有 Survivor 区，Eden 区每进行一次 Minor GC，存活的对象就会被送到老年代，老年代很快就会被填满。而有很多对象虽然一次 Minor GC 没有消灭，但其实也并不会蹦跶多久，或许第二次，第三次就需要被清除。这时候移入老年区，很明显不是一个明智的决定。</p><p>所以，Survivor 的存在意义就是减少被送到老年代的对象，进而减少 Major GC 的发生。Survivor 的预筛选保证，只有经历16次 Minor GC 还能在新生代中存活的对象，才会被送到老年代。</p><p>2、为啥需要俩？</p><p>设置两个 Survivor 区最大的好处就是解决内存碎片化。</p><p>我们先假设一下，Survivor 如果只有一个区域会怎样。Minor GC 执行后，Eden 区被清空了，存活的对象放到了 Survivor 区，而之前 Survivor 区中的对象，可能也有一些是需要被清除的。问题来了，这时候我们怎么清除它们？在这种场景下，我们只能标记清除，而我们知道标记清除最大的问题就是内存碎片，在新生代这种经常会消亡的区域，采用标记清除必然会让内存产生严重的碎片化。因为 Survivor 有2个区域，所以每次 Minor GC，会将之前 Eden 区和 From 区中的存活对象复制到 To 区域。第二次 Minor GC 时，From 与 To 职责兑换，这时候会将 Eden 区和 To 区中的存活对象再复制到 From 区域，以此反复。</p><p>这种机制最大的好处就是，整个过程中，永远有一个 Survivor space 是空的，另一个非空的 Survivor space 是无碎片的。那么，Survivor 为什么不分更多块呢？比方说分成三个、四个、五个?显然，如果 Survivor 区再细分下去，每一块的空间就会比较小，容易导致 Survivor 区满，两块 Survivor 区可能是经过权衡之后的最佳方案。</p><p><strong>Old 区</strong></p><p>老年代占据着2/3的堆内存空间，只有在 Major GC 的时候才会进行清理，每次 GC 都会触发“Stop-The-World”。内存越大，STW 的时间也越长，所以内存也不仅仅是越大就越好。由于复制算法在对象存活率较高的老年代会进行很多次的复制操作，效率很低，所以老年代这里采用的是标记 --- 整理算法。</p><p>除了上述所说，在内存担保机制下，无法安置的对象会直接进到老年代，以下几种情况也会进入老年代。</p><p>1、大对象</p><p>大对象指需要大量连续内存空间的对象，这部分对象不管是不是“朝生夕死”，都会直接进到老年代。这样做主要是为了避免在 Eden 区及2个 Survivor 区之间发生大量的内存复制。当你的系统有非常多“朝生夕死”的大对象时，得注意了。</p><p>2、长期存活对象</p><p>虚拟机给每个对象定义了一个对象年龄（Age）计数器。正常情况下对象会不断的在 Survivor 的 From 区与 To 区之间移动，对象在 Survivor 区中没经历一次 Minor GC，年龄就增加1岁。当年龄增加到15岁时，这时候就会被转移到老年代。当然，这里的15，JVM 也支持进行特殊设置。</p><p>3、动态对象年龄</p><p>虚拟机并不重视要求对象年龄必须到15岁，才会放入老年区，如果 Survivor 空间中相同年龄所有对象大小的综合大于 Survivor 空间的一般，年龄大于等于该年龄的对象就可以直接进去老年区，无需等你“成年”。</p><p>这其实有点类似于负载均衡，轮询是负载均衡的一种，保证每台机器都分得同样的请求。看似很均衡，但每台机的硬件不通，健康状况不同，我们还可以基于每台机接受的请求数，或每台机的响应时间等，来调整我们的负载均衡算法。</p><blockquote><ul><li>整理：沉默王二，原文链接：https://zhuanlan.zhihu.com/p/73628158</li><li>https://segmentfault.com/a/1190000038256027</li></ul></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/jvm/gc.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 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class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->虚拟机是如何执行字节码指令的？</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon 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88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 28 分钟</span><meta property="timeRequired" content="PT28M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/how-jvm-run-zijiema-zhiling.html#一-运行时栈帧结构" class="router-link-active router-link-exact-active toc-link level3">一. 运行时栈帧结构</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/how-jvm-run-zijiema-zhiling.html#二-方法调用" class="router-link-active router-link-exact-active toc-link level3">二. 方法调用</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/how-jvm-run-zijiema-zhiling.html#三-基于栈的字节码解释执行引擎" class="router-link-active router-link-exact-active toc-link level3">三. 基于栈的字节码解释执行引擎</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="虚拟机是如何执行字节码指令的" tabindex="-1"><a class="header-anchor" href="#虚拟机是如何执行字节码指令的" aria-hidden="true">#</a> 虚拟机是如何执行字节码指令的？</h1><p>执行引擎是 Java 虚拟机最核心的组成部分之一。「虚拟机」是相对于「物理机」的概念，这两种机器都有代码执行的能力，区别是物理机的执行引擎是直接建立在处理器、硬件、指令集和操作系统层面上的，而虚拟机执行引擎是由自己实现的，因此可以自行制定指令集与执行引擎的结构体系，并且能够执行那些不被硬件直接支持的指令集格式。</p><p>在 Java 虚拟机规范中制定了虚拟机字节码执行引擎的概念模型，这个概念模型成为各种虚拟机执行引擎的统一外观（Facade）。在不同的虚拟机实现里，执行引擎在执行 Java 代码的时候可能会有解释执行（通过解释器执行）和编译执行（通过即时编译器产生本地代码执行）两种方式，也可能两者都有，甚至还可能会包含几个不同级别的编译器执行引擎。但从外观上来看，所有 Java 虚拟机的执行引擎是一致的：输入的是字节码文件，处理过程是字节码解析的等效过程，输出的是执行结果。</p><h3 id="一-运行时栈帧结构" tabindex="-1"><a class="header-anchor" href="#一-运行时栈帧结构" aria-hidden="true">#</a> 一. 运行时栈帧结构</h3><p>栈帧（Stack Frame）是用于支持虚拟机进行方法调用和方法执行的数据结构，它是虚拟机运行时数据区中的虚拟机栈的栈元素。栈帧存储了方法的局部变量、操作数栈、动态链接和方法返回地址等信息。<strong>每一个方法从调用开始到执行完成的过程，都对应着一个栈帧在虚拟机栈里从入栈到出栈的过程。</strong></p><p>每一个栈帧都包括了局部变量表、操作数栈、动态链接、方法返回地址和一些额外的附加信息。在编译程序代码时，栈帧中需要多大的局部变量表，多深的操作数栈都已经完全确定了，并且写入到方法表的 Code 属性之中，因此一个栈帧需要分配多少内存，不会受到程序运行期变量数据的影响，而仅仅取决于具体的虚拟机实现。</p><p>一个线程中的方法调用链可能会很长，很多方法都处于执行状态。对于执行引擎来说，在活动线程中，只有位于栈顶的栈帧才是有效的，称为当前栈帧（Current Stack Frame），与这个栈帧相关联的方法成为当前方法。执行引擎运行的所有字节码指令对当前栈帧进行操作，在概念模型上，典型的栈帧结构如下图：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/how-jvm-run-zijiema-zhiling-a58ee82e-c0b0-4c06-9606-f7a0f0df0de9" alt=""></p><h4 id="局部变量表" tabindex="-1"><a class="header-anchor" href="#局部变量表" aria-hidden="true">#</a> 局部变量表</h4><p>局部变量表（Local Variables Table）用来保存方法中的局部变量，以及方法参数。当 Java 源代码文件被编译成 class 文件的时候，局部变量表的最大容量就已经确定了。</p><p>我们来看这样一段代码。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">LocalVaraiablesTable</span> <span class="token punctuation">{</span>
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class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.11 并发编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">2.12 JVM</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/jvm/what-is-jvm.html" class="nav-link sidebar-link sidebar-page" aria-label="JVM到底是什么？"><!---->JVM到底是什么？<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/how-run-java-code.html" class="nav-link sidebar-link sidebar-page" aria-label="JVM到底是如何运行Java代码的"><!---->JVM到底是如何运行Java代码的<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/class-load.html" class="nav-link sidebar-link sidebar-page" aria-label="类加载机制"><!---->类加载机制<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/class-file-jiegou.html" class="nav-link sidebar-link sidebar-page" aria-label="详解Java的类文件结构"><!---->详解Java的类文件结构<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/bytecode.html" class="nav-link sidebar-link sidebar-page" aria-label="从javap的角度轻松看懂字节码"><!---->从javap的角度轻松看懂字节码<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/zijiema-zhiling.html" class="nav-link sidebar-link sidebar-page" aria-label="字节码指令详解"><!---->字节码指令详解<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/jvm/how-jvm-run-zijiema-zhiling.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="虚拟机是如何执行字节码指令的"><!---->虚拟机是如何执行字节码指令的<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/how-jvm-run-zijiema-zhiling.html#一-运行时栈帧结构" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="一. 运行时栈帧结构"><!---->一. 运行时栈帧结构<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/how-jvm-run-zijiema-zhiling.html#二-方法调用" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="二. 方法调用"><!---->二. 方法调用<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/how-jvm-run-zijiema-zhiling.html#三-基于栈的字节码解释执行引擎" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="三. 基于栈的字节码解释执行引擎"><!---->三. 基于栈的字节码解释执行引擎<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/jvm/hsdb.html" class="nav-link sidebar-link sidebar-page" aria-label="HSDB（Hotspot Debugger）"><!---->HSDB（Hotspot Debugger）<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/asm.html" class="nav-link sidebar-link sidebar-page" aria-label="史上最通俗易懂的ASM教程"><!---->史上最通俗易懂的ASM教程<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/compile-jdk.html" class="nav-link sidebar-link sidebar-page" aria-label="自己编译JDK"><!---->自己编译JDK<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/neicun-jiegou.html" class="nav-link sidebar-link sidebar-page" aria-label="深入理解JVM的内存结构"><!---->深入理解JVM的内存结构<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/whereis-the-object.html" class="nav-link sidebar-link sidebar-page" aria-label="Java 创建的对象到底放在哪"><!---->Java 创建的对象到底放在哪<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/gc.html" class="nav-link sidebar-link sidebar-page" aria-label="从头到尾说一次Java垃圾回收"><!---->从头到尾说一次Java垃圾回收<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/tujie-gc.html" class="nav-link sidebar-link sidebar-page" aria-label="图解Java的垃圾回收机制"><!---->图解Java的垃圾回收机制<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/problem-tools.html" class="nav-link sidebar-link sidebar-page" aria-label="Java问题诊断和排查工具"><!---->Java问题诊断和排查工具<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/jit.html" class="nav-link sidebar-link sidebar-page" aria-label="JIT原理解析及实践"><!---->JIT原理解析及实践<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/oom.html" class="nav-link sidebar-link sidebar-page" aria-label="内存溢出排查优化实战"><!---->内存溢出排查优化实战<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/cpu-percent-100.html" class="nav-link sidebar-link sidebar-page" aria-label="CPU 100% 排查优化实践"><!---->CPU 100% 排查优化实践<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/zongjie.html" class="nav-link sidebar-link sidebar-page" aria-label="JVM 核心知识点总结"><!---->JVM 核心知识点总结<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->虚拟机是如何执行字节码指令的？</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月27日</span><meta property="datePublished" content="2022-03-27T04:07:13.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><li class="category category1" role>JVM</li><meta property="articleSection" content="Java核心,JVM"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 28 分钟</span><meta property="timeRequired" content="PT28M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/how-jvm-run-zijiema-zhiling.html#一-运行时栈帧结构" class="router-link-active router-link-exact-active toc-link level3">一. 运行时栈帧结构</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/how-jvm-run-zijiema-zhiling.html#二-方法调用" class="router-link-active router-link-exact-active toc-link level3">二. 方法调用</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/how-jvm-run-zijiema-zhiling.html#三-基于栈的字节码解释执行引擎" class="router-link-active router-link-exact-active toc-link level3">三. 基于栈的字节码解释执行引擎</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="虚拟机是如何执行字节码指令的" tabindex="-1"><a class="header-anchor" href="#虚拟机是如何执行字节码指令的" aria-hidden="true">#</a> 虚拟机是如何执行字节码指令的？</h1><p>执行引擎是 Java 虚拟机最核心的组成部分之一。「虚拟机」是相对于「物理机」的概念，这两种机器都有代码执行的能力，区别是物理机的执行引擎是直接建立在处理器、硬件、指令集和操作系统层面上的，而虚拟机执行引擎是由自己实现的，因此可以自行制定指令集与执行引擎的结构体系，并且能够执行那些不被硬件直接支持的指令集格式。</p><p>在 Java 虚拟机规范中制定了虚拟机字节码执行引擎的概念模型，这个概念模型成为各种虚拟机执行引擎的统一外观（Facade）。在不同的虚拟机实现里，执行引擎在执行 Java 代码的时候可能会有解释执行（通过解释器执行）和编译执行（通过即时编译器产生本地代码执行）两种方式，也可能两者都有，甚至还可能会包含几个不同级别的编译器执行引擎。但从外观上来看，所有 Java 虚拟机的执行引擎是一致的：输入的是字节码文件，处理过程是字节码解析的等效过程，输出的是执行结果。</p><h3 id="一-运行时栈帧结构" tabindex="-1"><a class="header-anchor" href="#一-运行时栈帧结构" aria-hidden="true">#</a> 一. 运行时栈帧结构</h3><p>栈帧（Stack Frame）是用于支持虚拟机进行方法调用和方法执行的数据结构，它是虚拟机运行时数据区中的虚拟机栈的栈元素。栈帧存储了方法的局部变量、操作数栈、动态链接和方法返回地址等信息。<strong>每一个方法从调用开始到执行完成的过程，都对应着一个栈帧在虚拟机栈里从入栈到出栈的过程。</strong></p><p>每一个栈帧都包括了局部变量表、操作数栈、动态链接、方法返回地址和一些额外的附加信息。在编译程序代码时，栈帧中需要多大的局部变量表，多深的操作数栈都已经完全确定了，并且写入到方法表的 Code 属性之中，因此一个栈帧需要分配多少内存，不会受到程序运行期变量数据的影响，而仅仅取决于具体的虚拟机实现。</p><p>一个线程中的方法调用链可能会很长，很多方法都处于执行状态。对于执行引擎来说，在活动线程中，只有位于栈顶的栈帧才是有效的，称为当前栈帧（Current Stack Frame），与这个栈帧相关联的方法成为当前方法。执行引擎运行的所有字节码指令对当前栈帧进行操作，在概念模型上，典型的栈帧结构如下图：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/how-jvm-run-zijiema-zhiling-a58ee82e-c0b0-4c06-9606-f7a0f0df0de9" alt=""></p><h4 id="局部变量表" tabindex="-1"><a class="header-anchor" href="#局部变量表" aria-hidden="true">#</a> 局部变量表</h4><p>局部变量表（Local Variables Table）用来保存方法中的局部变量，以及方法参数。当 Java 源代码文件被编译成 class 文件的时候，局部变量表的最大容量就已经确定了。</p><p>我们来看这样一段代码。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">LocalVaraiablesTable</span> <span class="token punctuation">{</span>
     <span class="token keyword">private</span> <span class="token keyword">void</span> <span class="token function">write</span><span class="token punctuation">(</span><span class="token keyword">int</span> age<span class="token punctuation">)</span> <span class="token punctuation">{</span>
         <span class="token class-name">String</span> name <span class="token operator">=</span> <span class="token string">&quot;沉默王二&quot;</span><span class="token punctuation">;</span>
     <span class="token punctuation">}</span>
@@ -273,6 +273,6 @@ Woman say hello!
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>代码输出结果：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>Father choice QQ!
 Son choice 360!
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><p>我们先来看看编译阶段编译器的选择过程，也就是静态分派过程。这个时候选择目标方法的依据有两点：一是静态类型是 Father 还是 Son；二是方法入参是 QQ 还是 QiHu360。<strong>因为是根据两个宗量进行选择的，所以 Java 语言的静态分派属于多分派</strong>。</p><p>再看看运行阶段虚拟机的选择过程，也就是动态分派的过程。在执行 son.hardChoice(new QiHu360()) 时，由于编译期已经确定目标方法的签名必须为 hardChoice(QiHu360)，这时参数的静态类型、实际类型都不会对方法的选择造成任何影响，唯一可以影响虚拟机选择的因数只有此方法的接收者的实际类型是 Father 还是 Son。因为只有一个宗量作为选择依据，所以 Java 语言的动态分派属于单分派。</p><p>综上所述，Java 语言是一门静态多分派、动态单分派的语言。</p><h3 id="三-基于栈的字节码解释执行引擎" tabindex="-1"><a class="header-anchor" href="#三-基于栈的字节码解释执行引擎" aria-hidden="true">#</a> 三. 基于栈的字节码解释执行引擎</h3><p>虚拟机如何调用方法已经介绍完了，下面我们来看看虚拟机是如何执行方法中的字节码指令的。</p><h4 id="解释执行" tabindex="-1"><a class="header-anchor" href="#解释执行" aria-hidden="true">#</a> 解释执行</h4><p>Java 语言常被人们定义成「解释执行」的语言，但随着 JIT 以及可直接将 Java 代码编译成本地代码的编译器的出现，这种说法就不对了。只有确定了谈论对象是某种具体的 Java 实现版本和执行引擎运行模式时，谈解释执行还是编译执行才会比较确切。</p><p>无论是解释执行还是编译执行，无论是物理机还是虚拟机，对于应用程序，机器都不可能像人一样阅读、理解，然后获得执行能力。大部分的程序代码到物理机的目标代码或者虚拟机执行的指令之前，都需要经过下图中的各个步骤。下图中最下面的那条分支，就是传统编译原理中程序代码到目标机器代码的生成过程；中间那条分支，则是解释执行的过程。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/how-jvm-run-zijiema-zhiling-3c8a0865-2a77-464e-8dd6-5616fd6a72d7.png" alt=""></p><p>如今，基于物理机、Java 虚拟机或者非 Java 的其它高级语言虚拟机的语言，大多都会遵循这种基于现代编译原理的思路，在执行前先对程序源代码进行词法分析和语法分析处理，把源代码转化为抽象语法树。对于一门具体语言的实现来说，词法分析、语法分析以至后面的优化器和目标代码生成器都可以选择独立于执行引擎，形成一个完整意义的编译器去实现，这类代表是 C/C++。也可以为一个半独立的编译器，这类代表是 Java。又或者把这些步骤和执行全部封装在一个封闭的黑匣子中，如大多数的 JavaScript 执行器。</p><p>Java 语言中，Javac 编译器完成了程序代码经过词法分析、语法分析到抽象语法树、再遍历语法树生成字节码指令流的过程。因为这一部分动作是在 Java 虚拟机之外进行的，而解释器在虚拟机的内部，所以 Java 程序的编译就是半独立的实现。</p><p>许多 Java 虚拟机的执行引擎在执行 Java 代码的时候都有解释执行（通过解释器执行）和编译执行（通过即时编译器产生本地代码执行）两种选择。而对于最新的 Android 版本的执行模式则是 AOT + JIT + 解释执行，关于这方面我们后面有机会再聊。</p><h4 id="基于栈的指令集与基于寄存器的指令集" tabindex="-1"><a class="header-anchor" href="#基于栈的指令集与基于寄存器的指令集" aria-hidden="true">#</a> 基于栈的指令集与基于寄存器的指令集</h4><p>Java 编译器输出的指令流，基本上是一种基于栈的指令集架构。基于栈的指令集主要的优点就是可移植，寄存器由硬件直接提供，程序直接依赖这些硬件寄存器则不可避免的要受到硬件约束。栈架构的指令集还有一些其他优点，比如相对更加紧凑（字节码中每个字节就对应一条指令，而多地址指令集中还需要存放参数）、编译实现更加简单（不需要考虑空间分配的问题，所有空间都是在栈上操作）等。</p><p>栈架构指令集的主要缺点是执行速度相对来说会稍慢一些。所有主流物理机的指令集都是寄存器架构也从侧面印证了这一点。</p><p>虽然栈架构指令集的代码非常紧凑，但是完成相同功能需要的指令集数量一般会比寄存器架构多，因为出栈、入栈操作本身就产生了相当多的指令数量。更重要的是，栈实现在内存中，频繁的栈访问也意味着频繁的内存访问，相对于处理器来说，内存始终是执行速度的瓶颈。由于指令数量和内存访问的原因，所以导致了栈架构指令集的执行速度会相对较慢。</p><p>正是基于上述原因，Android 虚拟机中采用了基于寄存器的指令集架构。不过有一点不同的是，前面说的是物理机上的寄存器，而 Android 上指的是虚拟机上的寄存器。</p><hr><p>引用链接：https://juejin.cn/post/6844903871010045960</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/jvm/how-jvm-run-zijiema-zhiling.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" 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href="/jvm/whereis-the-object.html" class="nav-link sidebar-link sidebar-page" aria-label="Java 创建的对象到底放在哪"><!---->Java 创建的对象到底放在哪<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/gc.html" class="nav-link sidebar-link sidebar-page" aria-label="从头到尾说一次Java垃圾回收"><!---->从头到尾说一次Java垃圾回收<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/tujie-gc.html" class="nav-link sidebar-link sidebar-page" aria-label="图解Java的垃圾回收机制"><!---->图解Java的垃圾回收机制<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/problem-tools.html" class="nav-link sidebar-link sidebar-page" aria-label="Java问题诊断和排查工具"><!---->Java问题诊断和排查工具<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/jit.html" class="nav-link sidebar-link sidebar-page" aria-label="JIT原理解析及实践"><!---->JIT原理解析及实践<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/oom.html" 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right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->JVM到底是如何运行Java代码的？</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 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0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><li class="category category1" role>JVM</li><meta property="articleSection" content="Java核心,JVM"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 6 分钟</span><meta property="timeRequired" content="PT6M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="jvm到底是如何运行java代码的" tabindex="-1"><a class="header-anchor" href="#jvm到底是如何运行java代码的" aria-hidden="true">#</a> JVM到底是如何运行Java代码的？</h1><p>“二哥，看了上一篇 <a href="https://mp.weixin.qq.com/s/191I_2CVOxVuyfLVtb4jhg" target="_blank" rel="noopener noreferrer">Hello World<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a> 的程序后，我很好奇，它是怎么在 Run 面板里打印出‘三妹，少看手机少打游戏，好好学，美美哒’呢？”三妹咪了一口麦香可可奶茶后对我说。</p><p>“三妹，我们通常把 Java 分为编译期和运行时，弄清楚这两个阶段就知道原因了。”</p><p>贴一下 HelloWorld 这段代码：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token doc-comment comment">/**
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class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/zongjie.html" class="nav-link sidebar-link sidebar-page" aria-label="JVM 核心知识点总结"><!---->JVM 核心知识点总结<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->JVM到底是如何运行Java代码的？</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 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content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 6 分钟</span><meta property="timeRequired" content="PT6M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="jvm到底是如何运行java代码的" tabindex="-1"><a class="header-anchor" href="#jvm到底是如何运行java代码的" aria-hidden="true">#</a> JVM到底是如何运行Java代码的？</h1><p>“二哥，看了上一篇 <a href="https://mp.weixin.qq.com/s/191I_2CVOxVuyfLVtb4jhg" target="_blank" rel="noopener noreferrer">Hello World<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a> 的程序后，我很好奇，它是怎么在 Run 面板里打印出‘三妹，少看手机少打游戏，好好学，美美哒’呢？”三妹咪了一口麦香可可奶茶后对我说。</p><p>“三妹，我们通常把 Java 分为编译期和运行时，弄清楚这两个阶段就知道原因了。”</p><p>贴一下 HelloWorld 这段代码：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token doc-comment comment">/**
  * <span class="token keyword">@author</span> 微信搜「沉默王二」，回复关键字 PDF
  */</span>
 <span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">HelloWorld</span> <span class="token punctuation">{</span>
@@ -108,6 +108,6 @@ public class com/itwanger/five/HelloWorld {
 0xb6   invokevirtual   运行时方法绑定调用方法
 0xb1   return          void 函数返回
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>opcode 有一个字节的长度(0~255)，意味着指令集的操作码个数不能操作 256 条。而紧跟在 opcode 后面的是被操作数。比如 b2 00 02，就代表了 <code>getstatic #2 &lt;java/lang/System.out&gt;</code>。</p><p>JVM 就是靠解析这些 opcode 和操作数来完成程序的执行的。当我们使用 Java 命令运行 .class 文件的时候，实际上就相当于启动了一个 JVM 进程。</p><p>然后 JVM 会翻译这些字节码，它有两种执行方式。常见的就是解释执行，将 opcode + 操作数翻译成机器代码；另外一种执行方式就是 <a href="https://tobebetterjavaer.com/jvm/jit.html" target="_blank" rel="noopener noreferrer">JIT<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，也就是我们常说的即时编译，它会在一定条件下将字节码编译成机器码之后再执行。</p><p>这些 .class 文件会被加载、存放到 metaspace 中，等待被调用，这里会有一个<a href="https://tobebetterjavaer.com/jvm/class-load.html" target="_blank" rel="noopener noreferrer">类加载器<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>的概念。</p><p>而 JVM 的程序运行，都是在栈上完成的，这和其他普通程序的执行是类似的，同样分为堆和栈。比如我们现在运行到了 main 方法，就会给它分配一个栈帧。当退出方法体时，会弹出相应的栈帧。你会发现，大多数字节码指令，就是不断的对栈帧进行操作。</p><p>而其他大块数据，是存放在堆上的。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/how-run-java-code-91dac706-1c4e-4775-bc4e-b2104283aa04.png" alt=""></p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png"></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/jvm/how-run-java-code.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path 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aria-label="一、前言"><!---->一、前言<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">二、Java核心</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.1 Java概述</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.2 Java基础语法</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.3 面向对象编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.4 字符串&amp;数组</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.5 集合框架（容器）</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.6 IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.11 并发编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">2.12 JVM</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/jvm/what-is-jvm.html" class="nav-link sidebar-link sidebar-page" aria-label="JVM到底是什么？"><!---->JVM到底是什么？<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/how-run-java-code.html" class="nav-link sidebar-link sidebar-page" aria-label="JVM到底是如何运行Java代码的"><!---->JVM到底是如何运行Java代码的<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/class-load.html" class="nav-link sidebar-link sidebar-page" aria-label="类加载机制"><!---->类加载机制<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/class-file-jiegou.html" class="nav-link sidebar-link sidebar-page" aria-label="详解Java的类文件结构"><!---->详解Java的类文件结构<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/bytecode.html" class="nav-link sidebar-link sidebar-page" aria-label="从javap的角度轻松看懂字节码"><!---->从javap的角度轻松看懂字节码<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/zijiema-zhiling.html" class="nav-link sidebar-link sidebar-page" aria-label="字节码指令详解"><!---->字节码指令详解<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/how-jvm-run-zijiema-zhiling.html" class="nav-link sidebar-link sidebar-page" aria-label="虚拟机是如何执行字节码指令的"><!---->虚拟机是如何执行字节码指令的<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/jvm/hsdb.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="HSDB（Hotspot Debugger）"><!---->HSDB（Hotspot Debugger）<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/hsdb.html#启动hsdb" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="启动HSDB"><!---->启动HSDB<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/hsdb.html#jvm参数设置" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="JVM参数设置"><!---->JVM参数设置<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/hsdb.html#获取应用进程id" class="router-link-active 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class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="对象直方图"><!---->对象直方图<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/hsdb.html#oop信息" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="OOP信息"><!---->OOP信息<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/hsdb.html#堆信息" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="堆信息"><!---->堆信息<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/hsdb.html#加载类列表" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="加载类列表"><!---->加载类列表<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/hsdb.html#元数据区" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="元数据区"><!---->元数据区<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/hsdb.html#生成class文件" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="生成class文件"><!---->生成class文件<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/hsdb.html#实战" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="实战"><!---->实战<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/hsdb.html#分析对象存储区域" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="分析对象存储区域"><!---->分析对象存储区域<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/hsdb.html#分析字符串字面量存储区域" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="分析字符串字面量存储区域"><!---->分析字符串字面量存储区域<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/hsdb.html#分析string-intern" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="分析String.intern"><!---->分析String.intern<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li></ul><!--]--></li><li><!--[--><a href="/jvm/asm.html" class="nav-link sidebar-link sidebar-page" aria-label="史上最通俗易懂的ASM教程"><!---->史上最通俗易懂的ASM教程<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/compile-jdk.html" class="nav-link sidebar-link sidebar-page" aria-label="自己编译JDK"><!---->自己编译JDK<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/neicun-jiegou.html" class="nav-link sidebar-link sidebar-page" aria-label="深入理解JVM的内存结构"><!---->深入理解JVM的内存结构<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/whereis-the-object.html" class="nav-link sidebar-link sidebar-page" aria-label="Java 创建的对象到底放在哪"><!---->Java 创建的对象到底放在哪<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/gc.html" class="nav-link sidebar-link sidebar-page" aria-label="从头到尾说一次Java垃圾回收"><!---->从头到尾说一次Java垃圾回收<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/tujie-gc.html" class="nav-link sidebar-link sidebar-page" aria-label="图解Java的垃圾回收机制"><!---->图解Java的垃圾回收机制<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/problem-tools.html" class="nav-link sidebar-link sidebar-page" aria-label="Java问题诊断和排查工具"><!---->Java问题诊断和排查工具<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/jit.html" class="nav-link sidebar-link sidebar-page" aria-label="JIT原理解析及实践"><!---->JIT原理解析及实践<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/oom.html" class="nav-link sidebar-link sidebar-page" aria-label="内存溢出排查优化实战"><!---->内存溢出排查优化实战<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/cpu-percent-100.html" class="nav-link sidebar-link sidebar-page" aria-label="CPU 100% 排查优化实践"><!---->CPU 100% 排查优化实践<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/zongjie.html" class="nav-link sidebar-link sidebar-page" aria-label="JVM 核心知识点总结"><!---->JVM 核心知识点总结<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->HSDB（Hotspot Debugger）从入门到实战</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月27日</span><meta property="datePublished" content="2022-03-27T04:07:13.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><li class="category category1" role>JVM</li><meta property="articleSection" content="Java核心,JVM"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 9 分钟</span><meta property="timeRequired" content="PT9M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/hsdb.html#启动hsdb" class="router-link-active router-link-exact-active toc-link level2">启动HSDB</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/hsdb.html#jvm参数设置" class="router-link-active router-link-exact-active toc-link level2">JVM参数设置</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/hsdb.html#获取应用进程id" class="router-link-active router-link-exact-active toc-link level2">获取应用进程id</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/hsdb.html#clhsdb常用指令" class="router-link-active router-link-exact-active toc-link level2">CLHSDB常用指令</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/hsdb.html#hsdb-gui界面" class="router-link-active router-link-exact-active toc-link level2">HSDB GUI界面</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/hsdb.html#可视化线程栈" class="router-link-active router-link-exact-active toc-link level3">可视化线程栈</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/hsdb.html#对象直方图" class="router-link-active router-link-exact-active toc-link level3">对象直方图</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/hsdb.html#oop信息" class="router-link-active router-link-exact-active toc-link level3">OOP信息</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/hsdb.html#堆信息" class="router-link-active router-link-exact-active toc-link level3">堆信息</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/hsdb.html#加载类列表" class="router-link-active router-link-exact-active toc-link level3">加载类列表</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/hsdb.html#元数据区" class="router-link-active router-link-exact-active toc-link level3">元数据区</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/hsdb.html#生成class文件" class="router-link-active router-link-exact-active toc-link level3">生成class文件</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/hsdb.html#实战" class="router-link-active router-link-exact-active toc-link level2">实战</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/hsdb.html#分析对象存储区域" class="router-link-active router-link-exact-active toc-link level3">分析对象存储区域</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/hsdb.html#分析字符串字面量存储区域" class="router-link-active router-link-exact-active toc-link level3">分析字符串字面量存储区域</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/hsdb.html#分析string-intern" class="router-link-active router-link-exact-active toc-link level3">分析String.intern</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="hsdb-hotspot-debugger-从入门到实战" tabindex="-1"><a class="header-anchor" href="#hsdb-hotspot-debugger-从入门到实战" aria-hidden="true">#</a> HSDB（Hotspot Debugger）从入门到实战</h1><p><code>HSDB（Hotspot Debugger)</code>，是一款内置于 SA 中的 GUI 调试工具，可用于调试 JVM 运行时数据，从而进行故障排除。</p><h2 id="启动hsdb" tabindex="-1"><a class="header-anchor" href="#启动hsdb" aria-hidden="true">#</a> 启动HSDB</h2><p>检测不同 JDK 版本需要使用不同的 <code>HSDB</code> 版本，否则容易出现无法扫描到对象等莫名其妙的问题</p><ul><li><strong>Mac</strong>：JDK7 和 JDK8 均可以采用以下的方式</li></ul><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>$ sudo java -cp ,:/Library/Java/JavaVirtualMachines/jdk1.7.0_80.jdk/Contents/Home/lib/sa-jdi.jar sun.jvm.hotspot.HSDB
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class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.11 并发编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">2.12 JVM</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/jvm/what-is-jvm.html" class="nav-link sidebar-link sidebar-page" aria-label="JVM到底是什么？"><!---->JVM到底是什么？<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/how-run-java-code.html" class="nav-link sidebar-link sidebar-page" aria-label="JVM到底是如何运行Java代码的"><!---->JVM到底是如何运行Java代码的<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/class-load.html" class="nav-link sidebar-link sidebar-page" aria-label="类加载机制"><!---->类加载机制<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/class-file-jiegou.html" class="nav-link sidebar-link sidebar-page" aria-label="详解Java的类文件结构"><!---->详解Java的类文件结构<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/bytecode.html" class="nav-link sidebar-link sidebar-page" aria-label="从javap的角度轻松看懂字节码"><!---->从javap的角度轻松看懂字节码<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/zijiema-zhiling.html" class="nav-link sidebar-link sidebar-page" aria-label="字节码指令详解"><!---->字节码指令详解<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/how-jvm-run-zijiema-zhiling.html" class="nav-link sidebar-link sidebar-page" aria-label="虚拟机是如何执行字节码指令的"><!---->虚拟机是如何执行字节码指令的<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/jvm/hsdb.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="HSDB（Hotspot Debugger）"><!---->HSDB（Hotspot Debugger）<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/hsdb.html#启动hsdb" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="启动HSDB"><!---->启动HSDB<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/hsdb.html#jvm参数设置" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="JVM参数设置"><!---->JVM参数设置<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/hsdb.html#获取应用进程id" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="获取应用进程id"><!---->获取应用进程id<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/hsdb.html#clhsdb常用指令" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="CLHSDB常用指令"><!---->CLHSDB常用指令<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/hsdb.html#hsdb-gui界面" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="HSDB GUI界面"><!---->HSDB GUI界面<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/hsdb.html#可视化线程栈" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="可视化线程栈"><!---->可视化线程栈<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/hsdb.html#对象直方图" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="对象直方图"><!---->对象直方图<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/hsdb.html#oop信息" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="OOP信息"><!---->OOP信息<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/hsdb.html#堆信息" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="堆信息"><!---->堆信息<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/hsdb.html#加载类列表" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="加载类列表"><!---->加载类列表<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/hsdb.html#元数据区" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="元数据区"><!---->元数据区<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/hsdb.html#生成class文件" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="生成class文件"><!---->生成class文件<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/hsdb.html#实战" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="实战"><!---->实战<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/hsdb.html#分析对象存储区域" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="分析对象存储区域"><!---->分析对象存储区域<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/hsdb.html#分析字符串字面量存储区域" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="分析字符串字面量存储区域"><!---->分析字符串字面量存储区域<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/hsdb.html#分析string-intern" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="分析String.intern"><!---->分析String.intern<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li></ul><!--]--></li><li><!--[--><a href="/jvm/asm.html" class="nav-link sidebar-link sidebar-page" aria-label="史上最通俗易懂的ASM教程"><!---->史上最通俗易懂的ASM教程<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/compile-jdk.html" class="nav-link sidebar-link sidebar-page" aria-label="自己编译JDK"><!---->自己编译JDK<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/neicun-jiegou.html" class="nav-link sidebar-link sidebar-page" aria-label="深入理解JVM的内存结构"><!---->深入理解JVM的内存结构<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/whereis-the-object.html" class="nav-link sidebar-link sidebar-page" aria-label="Java 创建的对象到底放在哪"><!---->Java 创建的对象到底放在哪<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/gc.html" class="nav-link sidebar-link sidebar-page" aria-label="从头到尾说一次Java垃圾回收"><!---->从头到尾说一次Java垃圾回收<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/tujie-gc.html" class="nav-link sidebar-link sidebar-page" aria-label="图解Java的垃圾回收机制"><!---->图解Java的垃圾回收机制<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/problem-tools.html" class="nav-link sidebar-link sidebar-page" aria-label="Java问题诊断和排查工具"><!---->Java问题诊断和排查工具<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/jit.html" class="nav-link sidebar-link sidebar-page" aria-label="JIT原理解析及实践"><!---->JIT原理解析及实践<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/oom.html" class="nav-link sidebar-link sidebar-page" aria-label="内存溢出排查优化实战"><!---->内存溢出排查优化实战<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/cpu-percent-100.html" class="nav-link sidebar-link sidebar-page" aria-label="CPU 100% 排查优化实践"><!---->CPU 100% 排查优化实践<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/zongjie.html" class="nav-link sidebar-link sidebar-page" aria-label="JVM 核心知识点总结"><!---->JVM 核心知识点总结<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->HSDB（Hotspot Debugger）从入门到实战</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月27日</span><meta property="datePublished" content="2022-03-27T04:07:13.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 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class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 9 分钟</span><meta property="timeRequired" content="PT9M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/hsdb.html#启动hsdb" class="router-link-active router-link-exact-active toc-link level2">启动HSDB</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/hsdb.html#jvm参数设置" class="router-link-active router-link-exact-active toc-link level2">JVM参数设置</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/hsdb.html#获取应用进程id" class="router-link-active router-link-exact-active toc-link level2">获取应用进程id</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/hsdb.html#clhsdb常用指令" class="router-link-active router-link-exact-active toc-link level2">CLHSDB常用指令</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/hsdb.html#hsdb-gui界面" class="router-link-active router-link-exact-active toc-link level2">HSDB GUI界面</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/hsdb.html#可视化线程栈" class="router-link-active router-link-exact-active toc-link level3">可视化线程栈</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/hsdb.html#对象直方图" class="router-link-active router-link-exact-active toc-link level3">对象直方图</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/hsdb.html#oop信息" class="router-link-active router-link-exact-active toc-link level3">OOP信息</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/hsdb.html#堆信息" class="router-link-active router-link-exact-active toc-link level3">堆信息</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/hsdb.html#加载类列表" class="router-link-active router-link-exact-active toc-link level3">加载类列表</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/hsdb.html#元数据区" class="router-link-active router-link-exact-active toc-link level3">元数据区</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/hsdb.html#生成class文件" class="router-link-active router-link-exact-active toc-link level3">生成class文件</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/hsdb.html#实战" class="router-link-active router-link-exact-active toc-link level2">实战</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/hsdb.html#分析对象存储区域" class="router-link-active router-link-exact-active toc-link level3">分析对象存储区域</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/hsdb.html#分析字符串字面量存储区域" class="router-link-active router-link-exact-active toc-link level3">分析字符串字面量存储区域</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/hsdb.html#分析string-intern" class="router-link-active router-link-exact-active toc-link level3">分析String.intern</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="hsdb-hotspot-debugger-从入门到实战" tabindex="-1"><a class="header-anchor" href="#hsdb-hotspot-debugger-从入门到实战" aria-hidden="true">#</a> HSDB（Hotspot Debugger）从入门到实战</h1><p><code>HSDB（Hotspot Debugger)</code>，是一款内置于 SA 中的 GUI 调试工具，可用于调试 JVM 运行时数据，从而进行故障排除。</p><h2 id="启动hsdb" tabindex="-1"><a class="header-anchor" href="#启动hsdb" aria-hidden="true">#</a> 启动HSDB</h2><p>检测不同 JDK 版本需要使用不同的 <code>HSDB</code> 版本，否则容易出现无法扫描到对象等莫名其妙的问题</p><ul><li><strong>Mac</strong>：JDK7 和 JDK8 均可以采用以下的方式</li></ul><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>$ sudo java -cp ,:/Library/Java/JavaVirtualMachines/jdk1.7.0_80.jdk/Contents/Home/lib/sa-jdi.jar sun.jvm.hotspot.HSDB
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><blockquote><p>事实上经过测试，即使通过 JDK8 自带的 <code>sa-jdi.jar</code> 去扫描对象（<code>scanoops</code>）的时候也会发生扫不到的情况，但可以通过其他手段代替</p></blockquote><p>而 JDK11 的启动方式有些区别</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>$ /Library/Java/JavaVirtualMachines/jdk-11.0.1.jdk/Contents/Home/bin/jhsdb hsdb
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><blockquote><p>事实上经过测试，该版本启动的 <code>HSDB</code> 会少支持一些指令（比如 <code>mem, whatis</code>），<strong>因此目前不推荐使用该版本</strong></p></blockquote><ul><li><strong>Windows</strong>:</li></ul><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>$ java -classpath &quot;%JAVA_HOME%/lib/sa-jdi.jar&quot; sun.jvm.hotspot.HSDB
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>其中启动版本可以使用 <code>/usr/libexec/java_home -V</code> 获取</p><blockquote><p>若遇到 Unable to locate an executable at “/Users/xx/.jenv/versions/1.7/bin/jhsdb” (-1) 可通过 <code>Jenv</code> 切换到当前 Jdk 版本即可解决</p></blockquote><h2 id="jvm参数设置" tabindex="-1"><a class="header-anchor" href="#jvm参数设置" aria-hidden="true">#</a> JVM参数设置</h2><p><code>HSDB</code> 对 <code>Serial GC</code> 支持的较好，因此 Debug 时增加参数 <code>-XX:+UseSerialGC</code>，Debug 工具可以使用 IDE 或 JDB</p><h2 id="获取应用进程id" tabindex="-1"><a class="header-anchor" href="#获取应用进程id" aria-hidden="true">#</a> 获取应用进程id</h2><p>jps 仅查找当前用户的 Java 进程，而不是当前系统中的所有进程</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>$ jps
@@ -95,6 +95,6 @@
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>上述在编译器确定的字面量有 <code>he</code>, <code>llo</code>, <code>hello</code>, <code>1</code>,  <code>2</code>, <code>12</code>，但在真正执行到语句前，符号引用不一定解析成直接引用，即字面量对应的对象会在执行到语句时（<code>idc</code> 指令）才会创建</p><p>首先看通过加载类列表查看字节码指令：</p><table><thead><tr><th>line</th><th>bci</th><th>bytecode</th></tr></thead><tbody><tr><td>7</td><td>0</td><td><code>new #2 [Class java.lang.StringBuilder]</code></td></tr><tr><td>7</td><td>3</td><td>dup</td></tr><tr><td>7</td><td>4</td><td><code>invokespecial #3 [Method void ()]</code></td></tr><tr><td>7</td><td>7</td><td><code>new #4 [Class java.lang.String]</code></td></tr><tr><td>7</td><td>10</td><td>dup</td></tr><tr><td>7</td><td>11</td><td><code> ldc #5(0) [fast_aldc]</code></td></tr><tr><td>7</td><td>13</td><td><code>invokespecial #6 [Method void (java.lang.String)]</code></td></tr><tr><td>7</td><td>16</td><td><code>invokevirtual #7 [Method java.lang.StringBuilder append(java.lang.String)]</code></td></tr><tr><td>7</td><td>19</td><td><code>new #4 [Class java.lang.String]</code></td></tr><tr><td>7</td><td>22</td><td>dup</td></tr><tr><td>7</td><td>23</td><td><code>ldc #8(1) [fast_aldc]</code></td></tr><tr><td>7</td><td>25</td><td><code>invokespecial #6 [Method void (java.lang.String)]</code></td></tr><tr><td>7</td><td>28</td><td><code>invokevirtual #7 [Method java.lang.StringBuilder append(java.lang.String)]</code></td></tr><tr><td>7</td><td>31</td><td><code>invokevirtual #9 [Method java.lang.String toString()]</code></td></tr><tr><td>7</td><td>34</td><td>astore_1</td></tr><tr><td>8</td><td>35</td><td>aload_1</td></tr><tr><td>8</td><td>36</td><td><code>invokevirtual #10 [Method java.lang.String intern()]</code></td></tr><tr><td>8</td><td>39</td><td>pop</td></tr><tr><td>9</td><td>40</td><td><code>ldc #11(2) [fast_aldc]</code></td></tr><tr><td>9</td><td>42</td><td>astore_2</td></tr><tr><td>10</td><td>43</td><td><code>getstatic #12 [Field java.io.PrintStream out]</code></td></tr><tr><td>10</td><td>46</td><td>aload_1</td></tr><tr><td>10</td><td>47</td><td>aload_2</td></tr><tr><td>10</td><td>48</td><td>if_acmpne 55</td></tr><tr><td>10</td><td>51</td><td>iconst_1</td></tr><tr><td>10</td><td>52</td><td>goto 56</td></tr><tr><td>10</td><td>55</td><td>iconst_0</td></tr><tr><td>10</td><td>56</td><td><code>invokevirtual #13 [Method void println(boolean)]</code></td></tr><tr><td>12</td><td>59</td><td><code>new #2 [Class java.lang.StringBuilder]</code></td></tr><tr><td>12</td><td>62</td><td>dup</td></tr><tr><td>12</td><td>63</td><td><code>invokevirtual #13 [Method void println(boolean)]</code></td></tr><tr><td>12</td><td>66</td><td><code>new #4 [Class java.lang.String]</code></td></tr><tr><td>12</td><td>69</td><td>dup</td></tr><tr><td>12</td><td>70</td><td><code>ldc #14(3) [fast_aldc]</code></td></tr><tr><td>12</td><td>72</td><td><code>invokespecial #6 [Method void (java.lang.String)]</code></td></tr><tr><td>12</td><td>75</td><td><code>invokevirtual #7 [Method java.lang.StringBuilder append(java.lang.String)]</code></td></tr><tr><td>12</td><td>78</td><td><code>new #4 [Class java.lang.String]</code></td></tr><tr><td>12</td><td>81</td><td>dup</td></tr><tr><td>12</td><td>82</td><td><code>ldc #15(4) [fast_aldc]</code></td></tr><tr><td>12</td><td>84</td><td><code>invokespecial #6 [Method void (java.lang.String)]</code></td></tr><tr><td>12</td><td>87</td><td><code>invokevirtual #7 [Method java.lang.StringBuilder append(java.lang.String)]</code></td></tr><tr><td>12</td><td>90</td><td><code>invokevirtual #9 [Method java.lang.String toString()]</code></td></tr><tr><td>12</td><td>93</td><td>astore_3</td></tr><tr><td>13</td><td>94</td><td><code>ldc #16(5) [fast_aldc]</code></td></tr><tr><td>13</td><td>96</td><td>astore #4</td></tr><tr><td>14</td><td>98</td><td>aload_3</td></tr><tr><td>14</td><td>99</td><td><code>invokevirtual #10 [Method java.lang.String intern()]</code></td></tr><tr><td>14</td><td>102</td><td>pop</td></tr><tr><td>15</td><td>103</td><td><code>getstatic #12 [Field java.io.PrintStream out]</code></td></tr><tr><td>15</td><td>106</td><td>aload_3</td></tr><tr><td>15</td><td>107</td><td>aload #4</td></tr><tr><td>15</td><td>109</td><td>if_acmpne 116</td></tr><tr><td>15</td><td>112</td><td>iconst_1</td></tr><tr><td>15</td><td>113</td><td>goto 117</td></tr><tr><td>15</td><td>116</td><td>iconst_0</td></tr><tr><td>15</td><td>117</td><td><code>invokevirtual #13 [Method void println(boolean)]</code></td></tr><tr><td>16</td><td>120</td><td>return</td></tr></tbody></table><p>可以看到确实有 6 个<code>idc</code>，但如果我们在第一行语句打上断点，会发现它们都不在 StringTable（但这里的 <code>he</code> 在，它可能被其他类用到了），然后执行第一行，会发现 <code>he</code> 和 <code>llo</code> 在了，但 <code>hello</code> 不在</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>jseval &quot;st = sa.vm.stringTable;st.stringsDo(function (s) { if (sapkg.oops.OopUtilities.stringOopToString(s).matches(&#39;^(he|llo|hello|1|2|12)&#39;)) {print(s + &#39;: &#39;);s.printValueOn(java.lang.System.out); println(&#39;&#39;)}})&quot;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/hsdb-ca5d06a0-1690-4a8f-98cb-aa6bd7800afe.png" alt=""></p><p>但是 <code>hello</code> 对象还是存在的（new）</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/hsdb-85253e10-d0c2-442b-a26b-91b1b2588f1c.png" alt=""></p><p>接着执行 s1.intern 会将 <code>hello</code> 对象的地址放入 StringTable</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/hsdb-801d35f2-0c8a-4699-afbf-057c1e6cac6c.png" alt=""></p><p>再执行 <code>String s2=&quot;hello&quot;;</code> 会发现 <code>hello</code> 对象仍然只有一个，都指向同一个。</p><p>而继续在 6 打断点，即执行完 <code>String s4 = &quot;12&quot;;</code>，因为 <code>12</code> 不在字符串常量池，那么会新建一个 <code>12</code>的实例，并让字符串常量池引用它，这样会发现就有两个 <code>12</code> 了</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/hsdb-47a42bfa-7645-4c9b-bcd8-aeabea1ae44f.png" alt=""></p><hr><blockquote><p>参考链接：https://zzcoder.cn/2019/12/06/HSDB%E4%BB%8E%E5%85%A5%E9%97%A8%E5%88%B0%E5%AE%9E%E6%88%98/</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/jvm/hsdb.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/14 上午7:14:28</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/jvm/how-jvm-run-zijiema-zhiling.html" class="nav-link prev" aria-label="虚拟机是如何执行字节码指令的"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->虚拟机是如何执行字节码指令的</div></a><a href="/jvm/asm.html" class="nav-link next" aria-label="史上最通俗易懂的ASM教程"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">史上最通俗易懂的ASM教程<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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diff --git a/dist/jvm/jit.html b/dist/jvm/jit.html
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Loop Transformations"><!---->4. Loop Transformations<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/jit.html#_5-窥孔优化与寄存器分配" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="5. 窥孔优化与寄存器分配"><!---->5. 窥孔优化与寄存器分配<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/jit.html#四、实践" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="四、实践"><!---->四、实践<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/jit.html#_1-编译相关的重-要参数" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="1. 编译相关的重* 要参数"><!---->1. 编译相关的重* 要参数<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/jit.html#_2-通过jitwatch分析编译日志" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="2. 通过JITwatch分析编译日志"><!---->2. 通过JITwatch分析编译日志<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/jit.html#_3-使用graal编译器" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="3. 使用Graal编译器"><!---->3. 使用Graal编译器<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/jit.html#五、总结" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="五、总结"><!---->五、总结<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/jvm/oom.html" class="nav-link sidebar-link sidebar-page" aria-label="内存溢出排查优化实战"><!---->内存溢出排查优化实战<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/cpu-percent-100.html" class="nav-link sidebar-link sidebar-page" aria-label="CPU 100% 排查优化实践"><!---->CPU 100% 排查优化实践<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/zongjie.html" class="nav-link sidebar-link sidebar-page" aria-label="JVM 核心知识点总结"><!---->JVM 核心知识点总结<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java即时编译（JIT）器原理解析及实践</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月27日</span><meta property="datePublished" content="2022-03-27T04:07:13.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><li class="category category1" role>JVM</li><meta property="articleSection" content="Java核心,JVM"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 37 分钟</span><meta property="timeRequired" content="PT37M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/jit.html#一、导读" class="router-link-active router-link-exact-active toc-link level2">一、导读</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/jit.html#二、java的执行过程" class="router-link-active router-link-exact-active toc-link level2">二、Java的执行过程</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/jit.html#_1-jvm中的编译器" class="router-link-active router-link-exact-active toc-link level3">1. JVM中的编译器</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/jit.html#_2-分层编译" class="router-link-active router-link-exact-active toc-link level3">2. 分层编译</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/jit.html#_3-即时编译的触发" class="router-link-active router-link-exact-active toc-link level3">3. 即时编译的触发</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/jit.html#三、编译优化" class="router-link-active router-link-exact-active toc-link level2">三、编译优化</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/jit.html#_1-中间表达形式-intermediate-representation" class="router-link-active router-link-exact-active toc-link level3">1. 中间表达形式（Intermediate Representation）</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/jit.html#_2-方法内联" class="router-link-active router-link-exact-active toc-link level3">2.方法内联</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/jit.html#_3-逃逸分析" class="router-link-active router-link-exact-active toc-link level3">3. 逃逸分析</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/jit.html#_4-loop-transformations" class="router-link-active router-link-exact-active toc-link level3">4. Loop Transformations</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/jit.html#_5-窥孔优化与寄存器分配" class="router-link-active router-link-exact-active toc-link level3">5. 窥孔优化与寄存器分配</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/jit.html#四、实践" class="router-link-active router-link-exact-active toc-link level2">四、实践</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/jit.html#_1-编译相关的重-要参数" class="router-link-active router-link-exact-active toc-link level3">1. 编译相关的重* 要参数</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/jit.html#_2-通过jitwatch分析编译日志" class="router-link-active router-link-exact-active toc-link level3">2. 通过JITwatch分析编译日志</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/jit.html#_3-使用graal编译器" class="router-link-active router-link-exact-active toc-link level3">3. 使用Graal编译器</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/jit.html#五、总结" class="router-link-active router-link-exact-active toc-link level2">五、总结</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="java即时编译-jit-器原理解析及实践" tabindex="-1"><a class="header-anchor" href="#java即时编译-jit-器原理解析及实践" aria-hidden="true">#</a> Java即时编译（JIT）器原理解析及实践</h1><h2 id="一、导读" tabindex="-1"><a class="header-anchor" href="#一、导读" aria-hidden="true">#</a> 一、导读</h2><p>常见的编译型语言如C++，通常会把代码直接编译成CPU所能理解的机器码来运行。而Java为了实现“一次编译，处处运行”的特性，把编译的过程分成两部分，首先它会先由javac编译成通用的中间形式——字节码，然后再由解释器逐条将字节码解释为机器码来执行。所以在性能上，Java通常不如C++这类编译型语言。</p><p>为了优化Java的性能 ，JVM在解释器之外引入了即时（Just In Time）编译器：当程序运行时，解释器首先发挥作用，代码可以直接执行。随着时间推移，即时编译器逐渐发挥作用，把越来越多的代码编译优化成本地代码，来获取更高的执行效率。解释器这时可以作为编译运行的降级手段，在一些不可靠的编译优化出现问题时，再切换回解释执行，保证程序可以正常运行。</p><p>即时编译器极大地提高了Java程序的运行速度，而且跟静态编译相比，即时编译器可以选择性地编译热点代码，省去了很多编译时间，也节省很多的空间。目前，即时编译器已经非常成熟了，在性能层面甚至可以和编译型语言相比。不过在这个领域，大家依然在不断探索如何结合不同的编译方式，使用更加智能的手段来提升程序的运行速度。</p><h2 id="二、java的执行过程" tabindex="-1"><a class="header-anchor" href="#二、java的执行过程" aria-hidden="true">#</a> 二、Java的执行过程</h2><p>Java的执行过程整体可以分为两个部分，第一步由javac将源码编译成字节码，在这个过程中会进行词法分析、语法分析、语义分析，编译原理中这部分的编译称为前端编译。接下来无需编译直接逐条将字节码解释执行，在解释执行的过程中，虚拟机同时对程序运行的信息进行收集，在这些信息的基础上，编译器会逐渐发挥作用，它会进行后端编译——把字节码编译成机器码，但不是所有的代码都会被编译，只有被JVM认定为的热点代码，才可能被编译。</p><p>怎么样才会被认为是热点代码呢？JVM中会设置一个阈值，当方法或者代码块的在一定时间内的调用次数超过这个阈值时就会被编译，存入codeCache中。当下次执行时，再遇到这段代码，就会从codeCache中读取机器码，直接执行，以此来提升程序运行的性能。整体的执行过程大致如下图所示：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/jit-9a62fc02-1a6a-451e-bb2b-19fc086d5be0.png" alt=""></p><h3 id="_1-jvm中的编译器" tabindex="-1"><a class="header-anchor" href="#_1-jvm中的编译器" aria-hidden="true">#</a> 1. JVM中的编译器</h3><p>JVM中集成了两种编译器，Client Compiler和Server Compiler，它们的作用也不同。Client Compiler注重启动速度和局部的优化，Server Compiler则更加关注全局的优化，性能会更好，但由于会进行更多的全局分析，所以启动速度会变慢。两种编译器有着不同的应用场景，在虚拟机中同时发挥作用。</p><p><strong>Client Compiler</strong></p><p>HotSpot VM带有一个Client Compiler C1编译器。这种编译器启动速度快，但是性能比较Server Compiler来说会差一些。C1会做三件事：</p><ul><li>局部简单可靠的优化，比如字节码上进行的一些基础优化，方法内联、常量传播等，放弃许多耗时较长的全局优化。</li><li>将字节码构造成高级中间表示（High-level Intermediate Representation，以下称为HIR），HIR与平台无关，通常采用图结构，更适合JVM对程序进行优化。</li><li>最后将HIR转换成低级中间表示（Low-level Intermediate Representation，以下称为LIR），在LIR的基础上会进行寄存器分配、窥孔优化（局部的优化方式，编译器在一个基本块或者多个基本块中，针对已经生成的代码，结合CPU自己指令的特点，通过一些认为可能带来性能提升的转换规则或者通过整体的分析，进行指令转换，来提升代码性能）等操作，最终生成机器码。</li></ul><p><strong>Server Compiler</strong></p><p>Server Compiler主要关注一些编译耗时较长的全局优化，甚至会还会根据程序运行的信息进行一些不可靠的激进优化。这种编译器的启动时间长，适用于长时间运行的后台程序，它的性能通常比Client Compiler高30%以上。目前，Hotspot虚拟机中使用的Server Compiler有两种：C2和Graal。</p><p><strong>C2 Compiler</strong></p><p>在Hotspot VM中，默认的Server Compiler是C2编译器。</p><p>C2编译器在进行编译优化时，会使用一种控制流与数据流结合的图数据结构，称为Ideal Graph。 Ideal Graph表示当前程序的数据流向和指令间的依赖关系，依靠这种图结构，某些优化步骤（尤其是涉及浮动代码块的那些优化步骤）变得不那么复杂。</p><p>Ideal Graph的构建是在解析字节码的时候，根据字节码中的指令向一个空的Graph中添加节点，Graph中的节点通常对应一个指令块，每个指令块包含多条相关联的指令，JVM会利用一些优化技术对这些指令进行优化，比如Global Value Numbering、常量折叠等，解析结束后，还会进行一些死代码剔除的操作。生成Ideal Graph后，会在这个基础上结合收集的程序运行信息来进行一些全局的优化，这个阶段如果JVM判断此时没有全局优化的必要，就会跳过这部分优化。</p><p>无论是否进行全局优化，Ideal Graph都会被转化为一种更接近机器层面的MachNode Graph，最后编译的机器码就是从MachNode Graph中得的，生成机器码前还会有一些包括寄存器分配、窥孔优化等操作。关于Ideal Graph和各种全局的优化手段会在后面的章节详细介绍。Server Compiler编译优化的过程如下图所示：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/jit-f4d1b763-be02-4bb2-ab0e-45b1f0eb9550.png" alt=""></p><p><strong>Graal Compiler</strong></p><p>从JDK 9开始，Hotspot VM中集成了一种新的Server Compiler，Graal编译器。相比C2编译器，Graal有这样几种关键特性：</p><ul><li>前文有提到，JVM会在解释执行的时候收集程序运行的各种信息，然后编译器会根据这些信息进行一些基于预测的激进优化，比如分支预测，根据程序不同分支的运行概率，选择性地编译一些概率较大的分支。Graal比C2更加青睐这种优化，所以Graal的峰值性能通常要比C2更好。</li><li>使用Java编写，对于Java语言，尤其是新特性，比如Lambda、Stream等更加友好。</li><li>更深层次的优化，比如虚函数的内联、部分逃逸分析等。</li></ul><p>Graal编译器可以通过Java虚拟机参数-XX:+UnlockExperimentalVMOptions -XX:+UseJVMCICompiler启用。当启用时，它将替换掉HotSpot中的C2编译器，并响应原本由C2负责的编译请求。</p><h3 id="_2-分层编译" tabindex="-1"><a class="header-anchor" href="#_2-分层编译" aria-hidden="true">#</a> 2. 分层编译</h3><p>在Java 7以前，需要研发人员根据服务的性质去选择编译器。对于需要快速启动的，或者一些不会长期运行的服务，可以采用编译效率较高的C1，对应参数-client。长期运行的服务，或者对峰值性能有要求的后台服务，可以采用峰值性能更好的C2，对应参数-server。Java 7开始引入了分层编译的概念，它结合了C1和C2的优势，追求启动速度和峰值性能的一个平衡。分层编译将JVM的执行状态分为了五个层次。五个层级分别是：</p><ol><li>解释执行。</li><li>执行不带profiling的C1代码。</li><li>执行仅带方法调用次数以及循环回边执行次数profiling的C1代码。</li><li>执行带所有profiling的C1代码。</li><li>执行C2代码。</li></ol><p>profiling就是收集能够反映程序执行状态的数据。其中最基本的统计数据就是方法的调用次数，以及循环回边的执行次数。</p><p>通常情况下，C2代码的执行效率要比C1代码的高出30%以上。C1层执行的代码，按执行效率排序从高至低则是1层&gt;2层&gt;3层。这5个层次中，1层和4层都是终止状态，当一个方法到达终止状态后，只要编译后的代码并没有失效，那么JVM就不会再次发出该方法的编译请求的。服务实际运行时，JVM会根据服务运行情况，从解释执行开始，选择不同的编译路径，直到到达终止状态。下图中就列举了几种常见的编译路径：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/jit-a6cebc82-ed4d-4b6d-892a-c5b245d227ab.png" alt=""></p><ul><li>图中第①条路径，代表编译的一般情况，热点方法从解释执行到被3层的C1编译，最后被4层的C2编译。</li><li>如果方法比较小（比如Java服务中常见的getter/setter方法），3层的profiling没有收集到有价值的数据，JVM就会断定该方法对于C1代码和C2代码的执行效率相同，就会执行图中第②条路径。在这种情况下，JVM会在3层编译之后，放弃进入C2编译，直接选择用1层的C1编译运行。</li><li>在C1忙碌的情况下，执行图中第③条路径，在解释执行过程中对程序进行profiling ，根据信息直接由第4层的C2编译。</li><li>前文提到C1中的执行效率是1层&gt;2层&gt;3层，第3层一般要比第2层慢35%以上，所以在C2忙碌的情况下，执行图中第④条路径。这时方法会被2层的C1编译，然后再被3层的C1编译，以减少方法在3层的执行时间。</li><li>如果编译器做了一些比较激进的优化，比如分支预测，在实际运行时发现预测出错，这时就会进行反优化，重新进入解释执行，图中第⑤条执行路径代表的就是反优化。</li></ul><p>总的来说，C1的编译速度更快，C2的编译质量更高，分层编译的不同编译路径，也就是JVM根据当前服务的运行情况来寻找当前服务的最佳平衡点的一个过程。从JDK 8开始，JVM默认开启分层编译。</p><h3 id="_3-即时编译的触发" tabindex="-1"><a class="header-anchor" href="#_3-即时编译的触发" aria-hidden="true">#</a> 3. 即时编译的触发</h3><p>Java虚拟机根据方法的调用次数以及循环回边的执行次数来触发即时编译。循环回边是一个控制流图中的概念，程序中可以简单理解为往回跳转的指令，比如下面这段代码：</p><p>循环回边</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">nlp</span><span class="token punctuation">(</span><span class="token class-name">Object</span> obj<span class="token punctuation">)</span> <span class="token punctuation">{</span>
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Loop Transformations"><!---->4. Loop Transformations<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/jit.html#_5-窥孔优化与寄存器分配" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="5. 窥孔优化与寄存器分配"><!---->5. 窥孔优化与寄存器分配<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/jit.html#四、实践" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="四、实践"><!---->四、实践<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/jit.html#_1-编译相关的重-要参数" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="1. 编译相关的重* 要参数"><!---->1. 编译相关的重* 要参数<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/jit.html#_2-通过jitwatch分析编译日志" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="2. 通过JITwatch分析编译日志"><!---->2. 通过JITwatch分析编译日志<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/jit.html#_3-使用graal编译器" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="3. 使用Graal编译器"><!---->3. 使用Graal编译器<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/jit.html#五、总结" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="五、总结"><!---->五、总结<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/jvm/oom.html" class="nav-link sidebar-link sidebar-page" aria-label="内存溢出排查优化实战"><!---->内存溢出排查优化实战<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/cpu-percent-100.html" class="nav-link sidebar-link sidebar-page" aria-label="CPU 100% 排查优化实践"><!---->CPU 100% 排查优化实践<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/zongjie.html" class="nav-link sidebar-link sidebar-page" aria-label="JVM 核心知识点总结"><!---->JVM 核心知识点总结<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java即时编译（JIT）器原理解析及实践</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月27日</span><meta property="datePublished" content="2022-03-27T04:07:13.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 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content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 37 分钟</span><meta property="timeRequired" content="PT37M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/jit.html#一、导读" class="router-link-active router-link-exact-active toc-link level2">一、导读</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/jit.html#二、java的执行过程" class="router-link-active router-link-exact-active toc-link level2">二、Java的执行过程</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/jit.html#_1-jvm中的编译器" class="router-link-active router-link-exact-active toc-link level3">1. JVM中的编译器</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/jit.html#_2-分层编译" class="router-link-active router-link-exact-active toc-link level3">2. 分层编译</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/jit.html#_3-即时编译的触发" class="router-link-active router-link-exact-active toc-link level3">3. 即时编译的触发</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/jit.html#三、编译优化" class="router-link-active router-link-exact-active toc-link level2">三、编译优化</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/jit.html#_1-中间表达形式-intermediate-representation" class="router-link-active router-link-exact-active toc-link level3">1. 中间表达形式（Intermediate Representation）</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/jit.html#_2-方法内联" class="router-link-active router-link-exact-active toc-link level3">2.方法内联</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/jit.html#_3-逃逸分析" class="router-link-active router-link-exact-active toc-link level3">3. 逃逸分析</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/jit.html#_4-loop-transformations" class="router-link-active router-link-exact-active toc-link level3">4. Loop Transformations</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/jit.html#_5-窥孔优化与寄存器分配" class="router-link-active router-link-exact-active toc-link level3">5. 窥孔优化与寄存器分配</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/jit.html#四、实践" class="router-link-active router-link-exact-active toc-link level2">四、实践</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/jit.html#_1-编译相关的重-要参数" class="router-link-active router-link-exact-active toc-link level3">1. 编译相关的重* 要参数</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/jit.html#_2-通过jitwatch分析编译日志" class="router-link-active router-link-exact-active toc-link level3">2. 通过JITwatch分析编译日志</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/jit.html#_3-使用graal编译器" class="router-link-active router-link-exact-active toc-link level3">3. 使用Graal编译器</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/jit.html#五、总结" class="router-link-active router-link-exact-active toc-link level2">五、总结</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="java即时编译-jit-器原理解析及实践" tabindex="-1"><a class="header-anchor" href="#java即时编译-jit-器原理解析及实践" aria-hidden="true">#</a> Java即时编译（JIT）器原理解析及实践</h1><h2 id="一、导读" tabindex="-1"><a class="header-anchor" href="#一、导读" aria-hidden="true">#</a> 一、导读</h2><p>常见的编译型语言如C++，通常会把代码直接编译成CPU所能理解的机器码来运行。而Java为了实现“一次编译，处处运行”的特性，把编译的过程分成两部分，首先它会先由javac编译成通用的中间形式——字节码，然后再由解释器逐条将字节码解释为机器码来执行。所以在性能上，Java通常不如C++这类编译型语言。</p><p>为了优化Java的性能 ，JVM在解释器之外引入了即时（Just In Time）编译器：当程序运行时，解释器首先发挥作用，代码可以直接执行。随着时间推移，即时编译器逐渐发挥作用，把越来越多的代码编译优化成本地代码，来获取更高的执行效率。解释器这时可以作为编译运行的降级手段，在一些不可靠的编译优化出现问题时，再切换回解释执行，保证程序可以正常运行。</p><p>即时编译器极大地提高了Java程序的运行速度，而且跟静态编译相比，即时编译器可以选择性地编译热点代码，省去了很多编译时间，也节省很多的空间。目前，即时编译器已经非常成熟了，在性能层面甚至可以和编译型语言相比。不过在这个领域，大家依然在不断探索如何结合不同的编译方式，使用更加智能的手段来提升程序的运行速度。</p><h2 id="二、java的执行过程" tabindex="-1"><a class="header-anchor" href="#二、java的执行过程" aria-hidden="true">#</a> 二、Java的执行过程</h2><p>Java的执行过程整体可以分为两个部分，第一步由javac将源码编译成字节码，在这个过程中会进行词法分析、语法分析、语义分析，编译原理中这部分的编译称为前端编译。接下来无需编译直接逐条将字节码解释执行，在解释执行的过程中，虚拟机同时对程序运行的信息进行收集，在这些信息的基础上，编译器会逐渐发挥作用，它会进行后端编译——把字节码编译成机器码，但不是所有的代码都会被编译，只有被JVM认定为的热点代码，才可能被编译。</p><p>怎么样才会被认为是热点代码呢？JVM中会设置一个阈值，当方法或者代码块的在一定时间内的调用次数超过这个阈值时就会被编译，存入codeCache中。当下次执行时，再遇到这段代码，就会从codeCache中读取机器码，直接执行，以此来提升程序运行的性能。整体的执行过程大致如下图所示：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/jit-9a62fc02-1a6a-451e-bb2b-19fc086d5be0.png" alt=""></p><h3 id="_1-jvm中的编译器" tabindex="-1"><a class="header-anchor" href="#_1-jvm中的编译器" aria-hidden="true">#</a> 1. JVM中的编译器</h3><p>JVM中集成了两种编译器，Client Compiler和Server Compiler，它们的作用也不同。Client Compiler注重启动速度和局部的优化，Server Compiler则更加关注全局的优化，性能会更好，但由于会进行更多的全局分析，所以启动速度会变慢。两种编译器有着不同的应用场景，在虚拟机中同时发挥作用。</p><p><strong>Client Compiler</strong></p><p>HotSpot VM带有一个Client Compiler C1编译器。这种编译器启动速度快，但是性能比较Server Compiler来说会差一些。C1会做三件事：</p><ul><li>局部简单可靠的优化，比如字节码上进行的一些基础优化，方法内联、常量传播等，放弃许多耗时较长的全局优化。</li><li>将字节码构造成高级中间表示（High-level Intermediate Representation，以下称为HIR），HIR与平台无关，通常采用图结构，更适合JVM对程序进行优化。</li><li>最后将HIR转换成低级中间表示（Low-level Intermediate Representation，以下称为LIR），在LIR的基础上会进行寄存器分配、窥孔优化（局部的优化方式，编译器在一个基本块或者多个基本块中，针对已经生成的代码，结合CPU自己指令的特点，通过一些认为可能带来性能提升的转换规则或者通过整体的分析，进行指令转换，来提升代码性能）等操作，最终生成机器码。</li></ul><p><strong>Server Compiler</strong></p><p>Server Compiler主要关注一些编译耗时较长的全局优化，甚至会还会根据程序运行的信息进行一些不可靠的激进优化。这种编译器的启动时间长，适用于长时间运行的后台程序，它的性能通常比Client Compiler高30%以上。目前，Hotspot虚拟机中使用的Server Compiler有两种：C2和Graal。</p><p><strong>C2 Compiler</strong></p><p>在Hotspot VM中，默认的Server Compiler是C2编译器。</p><p>C2编译器在进行编译优化时，会使用一种控制流与数据流结合的图数据结构，称为Ideal Graph。 Ideal Graph表示当前程序的数据流向和指令间的依赖关系，依靠这种图结构，某些优化步骤（尤其是涉及浮动代码块的那些优化步骤）变得不那么复杂。</p><p>Ideal Graph的构建是在解析字节码的时候，根据字节码中的指令向一个空的Graph中添加节点，Graph中的节点通常对应一个指令块，每个指令块包含多条相关联的指令，JVM会利用一些优化技术对这些指令进行优化，比如Global Value Numbering、常量折叠等，解析结束后，还会进行一些死代码剔除的操作。生成Ideal Graph后，会在这个基础上结合收集的程序运行信息来进行一些全局的优化，这个阶段如果JVM判断此时没有全局优化的必要，就会跳过这部分优化。</p><p>无论是否进行全局优化，Ideal Graph都会被转化为一种更接近机器层面的MachNode Graph，最后编译的机器码就是从MachNode Graph中得的，生成机器码前还会有一些包括寄存器分配、窥孔优化等操作。关于Ideal Graph和各种全局的优化手段会在后面的章节详细介绍。Server Compiler编译优化的过程如下图所示：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/jit-f4d1b763-be02-4bb2-ab0e-45b1f0eb9550.png" alt=""></p><p><strong>Graal Compiler</strong></p><p>从JDK 9开始，Hotspot VM中集成了一种新的Server Compiler，Graal编译器。相比C2编译器，Graal有这样几种关键特性：</p><ul><li>前文有提到，JVM会在解释执行的时候收集程序运行的各种信息，然后编译器会根据这些信息进行一些基于预测的激进优化，比如分支预测，根据程序不同分支的运行概率，选择性地编译一些概率较大的分支。Graal比C2更加青睐这种优化，所以Graal的峰值性能通常要比C2更好。</li><li>使用Java编写，对于Java语言，尤其是新特性，比如Lambda、Stream等更加友好。</li><li>更深层次的优化，比如虚函数的内联、部分逃逸分析等。</li></ul><p>Graal编译器可以通过Java虚拟机参数-XX:+UnlockExperimentalVMOptions -XX:+UseJVMCICompiler启用。当启用时，它将替换掉HotSpot中的C2编译器，并响应原本由C2负责的编译请求。</p><h3 id="_2-分层编译" tabindex="-1"><a class="header-anchor" href="#_2-分层编译" aria-hidden="true">#</a> 2. 分层编译</h3><p>在Java 7以前，需要研发人员根据服务的性质去选择编译器。对于需要快速启动的，或者一些不会长期运行的服务，可以采用编译效率较高的C1，对应参数-client。长期运行的服务，或者对峰值性能有要求的后台服务，可以采用峰值性能更好的C2，对应参数-server。Java 7开始引入了分层编译的概念，它结合了C1和C2的优势，追求启动速度和峰值性能的一个平衡。分层编译将JVM的执行状态分为了五个层次。五个层级分别是：</p><ol><li>解释执行。</li><li>执行不带profiling的C1代码。</li><li>执行仅带方法调用次数以及循环回边执行次数profiling的C1代码。</li><li>执行带所有profiling的C1代码。</li><li>执行C2代码。</li></ol><p>profiling就是收集能够反映程序执行状态的数据。其中最基本的统计数据就是方法的调用次数，以及循环回边的执行次数。</p><p>通常情况下，C2代码的执行效率要比C1代码的高出30%以上。C1层执行的代码，按执行效率排序从高至低则是1层&gt;2层&gt;3层。这5个层次中，1层和4层都是终止状态，当一个方法到达终止状态后，只要编译后的代码并没有失效，那么JVM就不会再次发出该方法的编译请求的。服务实际运行时，JVM会根据服务运行情况，从解释执行开始，选择不同的编译路径，直到到达终止状态。下图中就列举了几种常见的编译路径：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/jit-a6cebc82-ed4d-4b6d-892a-c5b245d227ab.png" alt=""></p><ul><li>图中第①条路径，代表编译的一般情况，热点方法从解释执行到被3层的C1编译，最后被4层的C2编译。</li><li>如果方法比较小（比如Java服务中常见的getter/setter方法），3层的profiling没有收集到有价值的数据，JVM就会断定该方法对于C1代码和C2代码的执行效率相同，就会执行图中第②条路径。在这种情况下，JVM会在3层编译之后，放弃进入C2编译，直接选择用1层的C1编译运行。</li><li>在C1忙碌的情况下，执行图中第③条路径，在解释执行过程中对程序进行profiling ，根据信息直接由第4层的C2编译。</li><li>前文提到C1中的执行效率是1层&gt;2层&gt;3层，第3层一般要比第2层慢35%以上，所以在C2忙碌的情况下，执行图中第④条路径。这时方法会被2层的C1编译，然后再被3层的C1编译，以减少方法在3层的执行时间。</li><li>如果编译器做了一些比较激进的优化，比如分支预测，在实际运行时发现预测出错，这时就会进行反优化，重新进入解释执行，图中第⑤条执行路径代表的就是反优化。</li></ul><p>总的来说，C1的编译速度更快，C2的编译质量更高，分层编译的不同编译路径，也就是JVM根据当前服务的运行情况来寻找当前服务的最佳平衡点的一个过程。从JDK 8开始，JVM默认开启分层编译。</p><h3 id="_3-即时编译的触发" tabindex="-1"><a class="header-anchor" href="#_3-即时编译的触发" aria-hidden="true">#</a> 3. 即时编译的触发</h3><p>Java虚拟机根据方法的调用次数以及循环回边的执行次数来触发即时编译。循环回边是一个控制流图中的概念，程序中可以简单理解为往回跳转的指令，比如下面这段代码：</p><p>循环回边</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">nlp</span><span class="token punctuation">(</span><span class="token class-name">Object</span> obj<span class="token punctuation">)</span> <span class="token punctuation">{</span>
   <span class="token keyword">int</span> sum <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span>
   <span class="token keyword">for</span> <span class="token punctuation">(</span><span class="token keyword">int</span> i <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span> i <span class="token operator">&lt;</span> <span class="token number">200</span><span class="token punctuation">;</span> i<span class="token operator">++</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
     sum <span class="token operator">+=</span> i<span class="token punctuation">;</span>
@@ -321,6 +321,6 @@ e = d;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>这种等效的转换消除了在循环中对a变量的需求，从而减少了开销。</p><h3 id="_5-窥孔优化与寄存器分配" tabindex="-1"><a class="header-anchor" href="#_5-窥孔优化与寄存器分配" aria-hidden="true">#</a> 5. 窥孔优化与寄存器分配</h3><p>前文提到的窥孔优化是优化的最后一步，这之后就会程序就会转换成机器码，窥孔优化就是将编译器所生成的中间代码（或目标代码）中相邻指令，将其中的某些组合替换为效率更高的指令组，常见的比如强度削减、常数合并等，看下面这个例子就是一个强度削减的例子：</p><p>强度削减</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>y1=x1*3  经过强度削减后得到  y1=(x1&lt;&lt;1)+x1
 
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><p>编译器使用移位和加法削减乘法的强度，使用更高效率的指令组。</p><p>寄存器分配也是一种编译的优化手段，在C2编译器中普遍的使用。它是通过把频繁使用的变量保存在寄存器中，CPU访问寄存器的速度比内存快得多，可以提升程序的运行速度。</p><p>寄存器分配和窥孔优化是程序优化的最后一步。经过寄存器分配和窥孔优化之后，程序就会被转换成机器码保存在codeCache中。</p><h2 id="四、实践" tabindex="-1"><a class="header-anchor" href="#四、实践" aria-hidden="true">#</a> 四、实践</h2><p>即时编译器情况复杂，同时网络上也很少有实战经验，以下是我们团队的一些调整经验。</p><h3 id="_1-编译相关的重-要参数" tabindex="-1"><a class="header-anchor" href="#_1-编译相关的重-要参数" aria-hidden="true">#</a> 1. 编译相关的重* 要参数</h3><ul><li>-XX:+TieredCompilation：开启分层编译，JDK8之后默认开启</li><li>-XX:+CICompilerCount=N：编译线程数，设置数量后，JVM会自动分配线程数，C1:C2 = 1:2</li><li>-XX:TierXBackEdgeThreshold：OSR编译的阈值</li><li>-XX:TierXMinInvocationThreshold：开启分层编译后各层调用的阈值</li><li>-XX:TierXCompileThreshold：开启分层编译后的编译阈值</li><li>-XX:ReservedCodeCacheSize：codeCache最大大小</li><li>-XX:InitialCodeCacheSize：codeCache初始大小</li></ul><p>-XX:TierXMinInvocationThreshold是开启分层编译的情况下，触发编译的阈值参数，当方法调用次数大于由参数-XX:TierXInvocationThreshold指定的阈值乘以系数，或者当方法调用次数大于由参数-XX:TierXMINInvocationThreshold指定的阈值乘以系数，并且方法调用次数和循环回边次数之和大于由参数-XX:TierXCompileThreshold指定的阈值乘以系数时，便会触发X层即时编译。分层编译开启下会乘以一个系数，系数根据当前编译的方法和编译线程数确定，降低阈值可以提升编译方法数，一些常用但是不能编译的方法可以编译优化提升性能。</p><p>由于编译情况复杂，JVM也会动态调整相关的阈值来保证JVM的性能，所以不建议手动调整编译相关的参数。除非一些特定的Case，比如codeCache满了停止了编译，可以适当增加codeCache大小，或者一些非常常用的方法，未被内联到，拖累了性能，可以调整内敛层数或者内联方法的大小来解决。</p><h3 id="_2-通过jitwatch分析编译日志" tabindex="-1"><a class="header-anchor" href="#_2-通过jitwatch分析编译日志" aria-hidden="true">#</a> 2. 通过JITwatch分析编译日志</h3><p>通过增加-XX:+UnlockDiagnosticVMOptions -XX:+PrintCompilation -XX:+PrintInlining -XX:+PrintCodeCache -XX:+PrintCodeCacheOnCompilation -XX:+TraceClassLoading -XX:+LogCompilation -XX:LogFile=LogPath参数可以输出编译、内联、codeCache信息到文件。但是打印的编译日志多且复杂很难直接从其中得到信息，可以使用JITwatch的工具来分析编译日志。JITwatch首页的Open Log选中日志文件，点击Start就可以开始分析日志。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/jit-82ee887c-af7d-48d7-88a0-28960e564d4a.png" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/jit-6158d832-9a0d-4af0-96ff-bf216a9cd5c6.png" alt=""></p><p>如上图所示，区域1中是整个项目Java Class包括引入的第三方依赖；区域2是功能区Timeline以图形的形式展示JIT编译的时间轴，Histo是直方图展示一些信息，TopList里面是编译中产生的一些对象和数据的排序，Cache是空闲codeCache空间，NMethod是Native方法，Threads是JIT编译的线程；区域3是JITwatch对日志分析结果的展示，其中Suggestions中会给出一些代码优化的建议，举个例子，如下图中：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/jit-04b2d9ea-7add-4ee5-bf72-61a6bbaa58cf.png" alt=""></p><p>我们可以看到在调用ZipInputStream的read方法时，因为该方法没有被标记为热点方法，同时又“太大了”，导致无法被内联到。使用-XX:CompileCommand中inline指令可以强制方法进行内联，不过还是建议谨慎使用，除非确定某个方法内联会带来不少的性能提升，否则不建议使用，并且过多使用对编译线程和codeCache都会带来不小的压力。</p><p>区域3中的-Allocs和-Locks逃逸分析后JVM对代码做的优化，包括栈上分配、锁消除等。</p><h3 id="_3-使用graal编译器" tabindex="-1"><a class="header-anchor" href="#_3-使用graal编译器" aria-hidden="true">#</a> 3. 使用Graal编译器</h3><p>由于JVM会去根据当前的编译方法数和编译线程数对编译阈值进行动态的调整，所以实际服务中对这一部分的调整空间是不大的，JVM做的已经足够多了。</p><p>为了提升性能，在服务中尝试了最新的Graal编译器。只需要使用-XX:+UnlockExperimentalVMOptions -XX:+UseJVMCICompiler就可以启动Graal编译器来代替C2编译器，并且响应C2的编译请求，不过要注意的是，Graal编译器与ZGC不兼容，只能与G1搭配使用。</p><p>前文有提到过，Graal是一个用Java写的即时编译器，它从Java 9开始便被集成自JDK中，作为实验性质的即时编译器。Graal编译器就是脱身于GraalVM，GraalVM是一个高性能的、支持多种编程语言的执行环境。它既可以在传统的 OpenJDK上运行，也可以通过AOT（Ahead-Of-Time）编译成可执行文件单独运行，甚至可以集成至数据库中运行。</p><p>前文提到过数次，Graal的优化都基于某种假设（Assumption）。当假设出错的情况下，Java虚拟机会借助去优化（Deoptimization）这项机制，从执行即时编译器生成的机器码切换回解释执行，在必要情况下，它甚至会废弃这份机器码，并在重新收集程序profile之后，再进行编译。</p><p>这些中激进的手段使得Graal的峰值性能要好于C2，而且在Scale、Ruby这种语言Graal表现更加出色，Twitter目前已经在服务中大量的使用Graal来提升性能，企业版的GraalVM使得Twitter服务性能提升了22%。</p><p><strong>使用Graal编译器后性能表现</strong></p><p>在我们的线上服务中，启用Graal编译后，TP9999从60ms -&gt; 50ms ，下降10ms，下降幅度达16.7%。</p><p>运行过程中的峰值性能会更高。可以看出对于该服务，Graal编译器带来了一定的性能提升。</p><p><strong>Graal编译器的问题</strong></p><p>Graal编译器的优化方式更加激进，因此在启动时会进行更多的编译，Graal编译器本身也需要被即时编译，所以服务刚启动时性能会比较差。</p><p>考虑的解决办法：JDK 9开始提供工具jaotc，同时GraalVM的Native Image都是可以通过静态编译，极大地提升服务的启动速度的方式，但是GraalVM会使用自己的垃圾回收，这是一种很原始的基于复制算法的垃圾回收，相比G1、ZGC这些优秀的新型垃圾回收器，它的性能并不好。同时GraalVM对Java的一些特性支持也不够，比如基于配置的支持，比如反射就需要把所有需要反射的类配置一个JSON文件，在大量使用反射的服务，这样的配置会是很大的工作量。我们也在做这方面的调研。</p><h2 id="五、总结" tabindex="-1"><a class="header-anchor" href="#五、总结" aria-hidden="true">#</a> 五、总结</h2><p>本文主要介绍了JIT即时编译的原理以及在美团一些实践的经验，还有最前沿的即时编译器的使用效果。作为一项解释型语言中提升性能的技术，JIT已经比较成熟了，在很多语言中都有使用。对于Java服务，JVM本身已经做了足够多，但是我们还应该不断深入了解JIT的优化原理和最新的编译技术，从而弥补JIT的劣势，提升Java服务的性能，不断追求卓越。</p><hr><p>原文链接：https://tech.meituan.com/2020/10/22/java-jit-practice-in-meituan.html</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/jvm/jit.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/14 上午7:14:28</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/jvm/problem-tools.html" class="nav-link prev" aria-label="Java问题诊断和排查工具"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->Java问题诊断和排查工具</div></a><a href="/jvm/oom.html" class="nav-link next" aria-label="内存溢出排查优化实战"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">内存溢出排查优化实战<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 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aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 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content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 70 分钟</span><meta property="timeRequired" content="PT70M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="java中9种常见的cms-gc问题分析与解决" tabindex="-1"><a class="header-anchor" href="#java中9种常见的cms-gc问题分析与解决" aria-hidden="true">#</a> Java中9种常见的CMS GC问题分析与解决</h1><p><strong>1.1 引言</strong></p><p>自 Sun 发布 Java 语言以来，开始使用 GC 技术来进行内存自动管理，避免了手动管理带来的悬挂指针（Dangling Pointer）问题，很大程度上提升了开发效率，从此 GC 技术也一举成名。GC 有着非常悠久的历史，1960 年有着“Lisp 之父”和“人工智能之父”之称的 John McCarthy 就在论文中发布了 GC 算法，60 年以来， GC 技术的发展也突飞猛进，但不管是多么前沿的收集器也都是基于三种基本算法的组合或应用，也就是说 GC 要解决的根本问题这么多年一直都没有变过。笔者认为，在不太远的将来， GC 技术依然不会过时，比起日新月异的新技术，GC 这门古典技术更值得我们学习。</p><p>那么，GC 问题处理能力能不能系统性掌握？一些影响因素都是<strong>互为因果</strong>的问题该怎么分析？比如一个服务 RT 突然上涨，有 GC 耗时增大、线程 Block 增多、慢查询增多、CPU 负载高四个表象，到底哪个是诱因？如何判断 GC 有没有问题？使用 CMS 有哪些常见问题？如何判断根因是什么？如何解决或避免这些问题？阅读完本文，相信你将会对 CMS GC 的问题处理有一个系统性的认知，更能游刃有余地解决这些问题，下面就让我们开始吧！文中若有错误之处，还请大家不吝指正。</p><p><strong>1.2 概览</strong></p><p>想要系统性地掌握 GC 问题处理，笔者这里给出一个学习路径，整体文章的框架也是按照这个结构展开，主要分四大步。</p><p><img src="https://upload-images.jianshu.io/upload_images/1179389-22ed8367a864013b?imageMogr2/auto-orient/strip|imageView2/2/w/1240" alt=""></p><ul><li><p>**建立知识体系：**从 JVM 的内存结构到垃圾收集的算法和收集器，学习 GC 的基础知识，掌握一些常用的 GC 问题分析工具。</p></li><li><p>**确定评价指标：**了解基本 GC 的评价方法，摸清如何设定独立系统的指标，以及在业务场景中判断 GC 是否存在问题的手段。</p></li><li><p>**场景调优实践：**运用掌握的知识和系统评价指标，分析与解决九种 CMS 中常见 GC 问题场景。</p></li><li><p>**总结优化经验：**对整体过程做总结并提出笔者的几点建议，同时将总结到的经验完善到知识体系之中。</p></li></ul><p><strong>2. GC 基础</strong></p><p>在正式开始前，先做些简要铺垫，介绍下 JVM 内存划分、收集算法、收集器等常用概念介绍，基础比较好的同学可以直接跳过这部分。</p><p><strong>2.1 基础概念</strong></p><ul><li><p>**GC：**GC 本身有三种语义，下文需要根据具体场景带入不同的语义：</p></li><li><p><strong>Garbage Collection</strong>：垃圾收集技术，名词。</p></li><li><p><strong>Garbage Collector</strong>：垃圾收集器，名词。</p></li><li><p><strong>Garbage Collecting</strong>：垃圾收集动作，动词。</p></li><li><p>**Mutator：**生产垃圾的角色，也就是我们的应用程序，垃圾制造者，通过 Allocator 进行 allocate 和 free。</p></li><li><p>**TLAB：**Thread Local Allocation Buffer 的简写，基于 CAS 的独享线程（Mutator Threads）可以优先将对象分配在 Eden 中的一块内存，因为是 Java 线程独享的内存区没有锁竞争，所以分配速度更快，每个 TLAB 都是一个线程独享的。</p></li><li><p>**Card Table：**中文翻译为卡表，主要是用来标记卡页的状态，每个卡表项对应一个卡页。当卡页中一个对象引用有写操作时，写屏障将会标记对象所在的卡表状态改为 dirty，卡表的本质是用来解决跨代引用的问题。具体怎么解决的可以参考 StackOverflow 上的这个问题 <a href="https://stackoverflow.com/questions/19154607/how-actually-card-table-and-writer-barrier-works" target="_blank" rel="noopener noreferrer">how-actually-card-table-and-writer-barrier-works<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，或者研读一下 cardTableRS.app 中的源码。</p></li></ul><p><strong>2.2 JVM 内存划分</strong></p><p>从 JCP（Java Community Process）的官网中可以看到，目前 Java 版本最新已经到了 Java 16，未来的 Java 17 以及现在的 Java 11 和 Java 8 是 LTS 版本，JVM 规范也在随着迭代在变更，由于本文主要讨论 CMS，此处还是放 Java 8 的内存结构。</p><p><img src="https://upload-images.jianshu.io/upload_images/1179389-5379d37a996aabf9?imageMogr2/auto-orient/strip|imageView2/2/w/1240" alt=""></p><p>GC 主要工作在 Heap 区和 MetaSpace 区（上图蓝色部分），在 Direct Memory 中，如果使用的是 DirectByteBuffer，那么在分配内存不够时则是 GC 通过 <code>Cleaner#clean</code> 间接管理。</p><p>任何自动内存管理系统都会面临的步骤：为新对象分配空间，然后收集垃圾对象空间，下面我们就展开介绍一下这些基础知识。</p><p><strong>2.3 分配对象</strong></p><p>Java 中对象地址操作主要使用 Unsafe 调用了 C 的 allocate 和 free 两个方法，分配方法有两种：</p><ul><li><p>**空闲链表（free list）：**通过额外的存储记录空闲的地址，将随机 IO 变为顺序 IO，但带来了额外的空间消耗。</p></li><li><p>**碰撞指针（bump  pointer）：**通过一个指针作为分界点，需要分配内存时，仅需把指针往空闲的一端移动与对象大小相等的距离，分配效率较高，但使用场景有限。</p></li></ul><p><strong>2.4 收集对象</strong></p><p><strong>2.4.1 识别垃圾</strong></p><ul><li><p>**引用计数法（Reference Counting）：**对每个对象的引用进行计数，每当有一个地方引用它时计数器 +1、引用失效则 -1，引用的计数放到对象头中，大于 0 的对象被认为是存活对象。虽然循环引用的问题可通过 Recycler 算法解决，但是在多线程环境下，引用计数变更也要进行昂贵的同步操作，性能较低，早期的编程语言会采用此算法。</p></li><li><p>**可达性分析，又称引用链法（Tracing GC）：**从 GC Root 开始进行对象搜索，可以被搜索到的对象即为可达对象，此时还不足以判断对象是否存活/死亡，需要经过多次标记才能更加准确地确定，整个连通图之外的对象便可以作为垃圾被回收掉。目前 Java 中主流的虚拟机均采用此算法。</p></li></ul><p>备注：引用计数法是可以处理循环引用问题的，下次面试时不要再这么说啦~ ~</p><p><strong>2.4.2 收集算法</strong></p><p>自从有自动内存管理出现之时就有的一些收集算法，不同的收集器也是在不同场景下进行组合。</p><ul><li><p>**Mark-Sweep（标记-清除）：**回收过程主要分为两个阶段，第一阶段为追踪（Tracing）阶段，即从 GC Root 开始遍历对象图，并标记（Mark）所遇到的每个对象，第二阶段为清除（Sweep）阶段，即回收器检查堆中每一个对象，并将所有未被标记的对象进行回收，整个过程不会发生对象移动。整个算法在不同的实现中会使用三色抽象（Tricolour Abstraction）、位图标记（BitMap）等技术来提高算法的效率，存活对象较多时较高效。</p></li><li><p>**Mark-Compact （标记-整理）：**这个算法的主要目的就是解决在非移动式回收器中都会存在的碎片化问题，也分为两个阶段，第一阶段与 Mark-Sweep 类似，第二阶段则会对存活对象按照整理顺序（Compaction Order）进行整理。主要实现有双指针（Two-Finger）回收算法、滑动回收（Lisp2）算法和引线整理（Threaded Compaction）算法等。</p></li><li><p>**Copying（复制）：**将空间分为两个大小相同的 From 和 To 两个半区，同一时间只会使用其中一个，每次进行回收时将一个半区的存活对象通过复制的方式转移到另一个半区。有递归（Robert R. Fenichel 和 Jerome C. Yochelson提出）和迭代（Cheney 提出）算法，以及解决了前两者递归栈、缓存行等问题的近似优先搜索算法。复制算法可以通过碰撞指针的方式进行快速地分配内存，但是也存在着空间利用率不高的缺点，另外就是存活对象比较大时复制的成本比较高。</p></li></ul><p>三种算法在是否移动对象、空间和时间方面的一些对比，假设存活对象数量为 <em>L</em>、堆空间大小为 <em>H</em>，则：</p><p><img src="https://upload-images.jianshu.io/upload_images/1179389-03f497067b9ff350?imageMogr2/auto-orient/strip|imageView2/2/w/1240" alt=""></p><p>把 mark、sweep、compaction、copying 这几种动作的耗时放在一起看，大致有这样的关系：</p><p><img src="https://upload-images.jianshu.io/upload_images/1179389-a1c69e01cb02c636?imageMogr2/auto-orient/strip|imageView2/2/w/1240" alt=""></p><p>虽然 compaction 与 copying 都涉及移动对象，但取决于具体算法，compaction 可能要先计算一次对象的目标地址，然后修正指针，最后再移动对象。copying 则可以把这几件事情合为一体来做，所以可以快一些。另外，还需要留意 GC 带来的开销不能只看 Collector 的耗时，还得看 Allocator 。如果能保证内存没碎片，分配就可以用 pointer bumping 方式，只需要挪一个指针就完成了分配，非常快。而如果内存有碎片就得用 freelist 之类的方式管理，分配速度通常会慢一些。</p><p><strong>2.5 收集器</strong></p><p>目前在 Hotspot VM 中主要有分代收集和分区收集两大类，具体可以看下面的这个图，不过未来会逐渐向分区收集发展。在美团内部，有部分业务尝试用了 ZGC（感兴趣的同学可以学习下这篇文章《<a href="http://mp.weixin.qq.com/s?__biz=MjM5NjQ5MTI5OA==&amp;mid=2651752559&amp;idx=1&amp;sn=c720b67e93db1885d72dab8799bba78c&amp;chksm=bd1251228a65d834db610deb2ce55003e0fc1f90793e84873096db19027936f6add301242545&amp;scene=21#wechat_redirect" target="_blank" rel="noopener noreferrer">新一代垃圾回收器ZGC的探索与实践<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>》），其余基本都停留在 CMS 和 G1 上。另外在 JDK11 后提供了一个不执行任何垃圾回收动作的回收器 Epsilon（A No-Op Garbage Collector）用作性能分析。另外一个就是 Azul 的 Zing JVM，其 C4（Concurrent Continuously Compacting Collector）收集器也在业内有一定的影响力。</p><p><img src="https://upload-images.jianshu.io/upload_images/1179389-6c3339b84c2861cf?imageMogr2/auto-orient/strip|imageView2/2/w/1240" alt=""></p><p>备注：值得一提的是，早些年国内 GC 技术的布道者 RednaxelaFX （江湖人称 R 大）曾就职于 Azul，本文的一部分材料也参考了他的一些文章。</p><p><strong>2.5.1 分代收集器</strong></p><ul><li><p>**ParNew：**一款多线程的收集器，采用复制算法，主要工作在 Young 区，可以通过 <code>-XX:ParallelGCThreads</code> 参数来控制收集的线程数，整个过程都是 STW 的，常与 CMS 组合使用。</p></li><li><p>**CMS：**以获取最短回收停顿时间为目标，采用“标记-清除”算法，分 4 大步进行垃圾收集，其中初始标记和重新标记会 STW ，多数应用于互联网站或者 B/S 系统的服务器端上，JDK9 被标记弃用，JDK14 被删除，详情可见 <a href="https://openjdk.java.net/jeps/363" target="_blank" rel="noopener noreferrer">JEP 363<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>。</p></li></ul><h4 id="_2-5-2-分区收集器" tabindex="-1"><a class="header-anchor" href="#_2-5-2-分区收集器" aria-hidden="true">#</a> 2.5.2 分区收集器</h4><ul><li><p>**G1：**一种服务器端的垃圾收集器，应用在多处理器和大容量内存环境中，在实现高吞吐量的同时，尽可能地满足垃圾收集暂停时间的要求。</p></li><li><p>**ZGC：**JDK11 中推出的一款低延迟垃圾回收器，适用于大内存低延迟服务的内存管理和回收，SPECjbb 2015 基准测试，在 128G 的大堆下，最大停顿时间才 1.68 ms，停顿时间远胜于 G1 和 CMS。</p></li><li><p>**Shenandoah：**由 Red Hat 的一个团队负责开发，与 G1 类似，基于 Region 设计的垃圾收集器，但不需要 Remember Set 或者 Card Table 来记录跨 Region 引用，停顿时间和堆的大小没有任何关系。停顿时间与 ZGC 接近，下图为与 CMS 和 G1 等收集器的 benchmark。</p></li></ul><p><img src="https://upload-images.jianshu.io/upload_images/1179389-238d04be0f931ddc?imageMogr2/auto-orient/strip|imageView2/2/w/1240" alt=""></p><p><strong>2.5.3 常用收集器</strong></p><p>目前使用最多的是 CMS 和 G1 收集器，二者都有分代的概念，主要内存结构如下：</p><p><img src="https://upload-images.jianshu.io/upload_images/1179389-8082240b37153163.gif?imageMogr2/auto-orient/strip|imageView2/2/w/1240" alt=""></p><p><strong>2.5.4 其他收集器</strong></p><p>以上仅列出常见收集器，除此之外还有很多，如 Metronome、Stopless、Staccato、Chicken、Clover 等实时回收器，Sapphire、Compressor、Pauseless 等并发复制/整理回收器，Doligez-Leroy-Conthier 等标记整理回收器，由于篇幅原因，不在此一一介绍。</p><p><strong>2.6 常用工具</strong></p><p>工欲善其事，必先利其器，此处列出一些笔者常用的工具，具体情况大家可以自由选择，本文的问题都是使用这些工具来定位和分析的。</p><p><strong>2.6.1 命令行终端</strong></p><ul><li><p><strong>标准终端类</strong>：jps、jinfo、jstat、jstack、jmap</p></li><li><p><strong>功能整合类</strong>：jcmd、vjtools、arthas、greys</p></li></ul><p><strong>2.6.2 可视化界面</strong></p><ul><li><p><strong>简易</strong>：JConsole、JVisualvm、HA、GCHisto、GCViewer</p></li><li><p><strong>进阶</strong>：MAT、JProfiler</p></li></ul><p>命令行推荐 arthas ，可视化界面推荐 JProfiler，此外还有一些在线的平台 <a href="https://gceasy.io/" target="_blank" rel="noopener noreferrer">gceasy<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>、<a href="https://heaphero.io/" target="_blank" rel="noopener noreferrer">heaphero<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>、<a href="https://fastthread.io/" target="_blank" rel="noopener noreferrer">fastthread<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a> ，美团内部的 Scalpel（一款自研的 JVM 问题诊断工具，暂时未开源）也比较好用。</p><p><strong>3. GC 问题判断</strong></p><p>在做 GC 问题排查和优化之前，我们需要先来明确下到底是不是 GC 直接导致的问题，或者应用代码导致的 GC 异常，最终出现问题。</p><p><strong>3.1 判断 GC 有没有问题？</strong></p><p><strong>3.1.1 设定评价标准</strong></p><p>评判 GC 的两个核心指标：</p><ul><li><p>**延迟（Latency）：**也可以理解为最大停顿时间，即垃圾收集过程中一次 STW 的最长时间，越短越好，一定程度上可以接受频次的增大，GC 技术的主要发展方向。</p></li><li><p>**吞吐量（Throughput）：**应用系统的生命周期内，由于 GC 线程会占用 Mutator 当前可用的 CPU 时钟周期，吞吐量即为 Mutator 有效花费的时间占系统总运行时间的百分比，例如系统运行了 100 min，GC 耗时 1 min，则系统吞吐量为 99%，吞吐量优先的收集器可以接受较长的停顿。</p></li></ul><p>目前各大互联网公司的系统基本都更追求低延时，避免一次 GC 停顿的时间过长对用户体验造成损失，衡量指标需要结合一下应用服务的 SLA，主要如下两点来判断：</p><p><img src="https://upload-images.jianshu.io/upload_images/1179389-0116d4ae68567826?imageMogr2/auto-orient/strip|imageView2/2/w/1240" alt=""></p><p>简而言之，即为<strong>一次停顿的时间不超过应用服务的 TP9999，GC 的吞吐量不小于 99.99%</strong>。举个例子，假设某个服务 A 的 TP9999 为 80 ms，平均 GC 停顿为 30 ms，那么该服务的最大停顿时间最好不要超过 80 ms，GC 频次控制在 5 min 以上一次。如果满足不了，那就需要调优或者通过更多资源来进行并联冗余。（大家可以先停下来，看看监控平台上面的 gc.meantime 分钟级别指标，如果超过了 6 ms 那单机 GC 吞吐量就达不到 4 个 9 了。）</p><p>备注：除了这两个指标之外还有 Footprint（资源量大小测量）、反应速度等指标，互联网这种实时系统追求低延迟，而很多嵌入式系统则追求 Footprint。</p><p><strong>3.1.2 读懂 GC Cause</strong></p><p>拿到 GC 日志，我们就可以简单分析 GC 情况了，通过一些工具，我们可以比较直观地看到 Cause 的分布情况，如下图就是使用 gceasy 绘制的图表：</p><p><img src="https://upload-images.jianshu.io/upload_images/1179389-955a1b25ed4cf223?imageMogr2/auto-orient/strip|imageView2/2/w/1240" alt=""></p><p>如上图所示，我们很清晰的就能知道是什么原因引起的 GC，以及每次的时间花费情况，但是要分析 GC 的问题，先要读懂 GC Cause，即 JVM 什么样的条件下选择进行 GC 操作，具体 Cause 的分类可以看一下 Hotspot 源码：src/share/vm/gc/shared/gcCause.hpp 和 src/share/vm/gc/shared/gcCause.cpp 中。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>const char* GCCause::to_string(GCCause::Cause cause) {
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16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 70 分钟</span><meta property="timeRequired" content="PT70M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="java中9种常见的cms-gc问题分析与解决" tabindex="-1"><a class="header-anchor" href="#java中9种常见的cms-gc问题分析与解决" aria-hidden="true">#</a> Java中9种常见的CMS GC问题分析与解决</h1><p><strong>1.1 引言</strong></p><p>自 Sun 发布 Java 语言以来，开始使用 GC 技术来进行内存自动管理，避免了手动管理带来的悬挂指针（Dangling Pointer）问题，很大程度上提升了开发效率，从此 GC 技术也一举成名。GC 有着非常悠久的历史，1960 年有着“Lisp 之父”和“人工智能之父”之称的 John McCarthy 就在论文中发布了 GC 算法，60 年以来， GC 技术的发展也突飞猛进，但不管是多么前沿的收集器也都是基于三种基本算法的组合或应用，也就是说 GC 要解决的根本问题这么多年一直都没有变过。笔者认为，在不太远的将来， GC 技术依然不会过时，比起日新月异的新技术，GC 这门古典技术更值得我们学习。</p><p>那么，GC 问题处理能力能不能系统性掌握？一些影响因素都是<strong>互为因果</strong>的问题该怎么分析？比如一个服务 RT 突然上涨，有 GC 耗时增大、线程 Block 增多、慢查询增多、CPU 负载高四个表象，到底哪个是诱因？如何判断 GC 有没有问题？使用 CMS 有哪些常见问题？如何判断根因是什么？如何解决或避免这些问题？阅读完本文，相信你将会对 CMS GC 的问题处理有一个系统性的认知，更能游刃有余地解决这些问题，下面就让我们开始吧！文中若有错误之处，还请大家不吝指正。</p><p><strong>1.2 概览</strong></p><p>想要系统性地掌握 GC 问题处理，笔者这里给出一个学习路径，整体文章的框架也是按照这个结构展开，主要分四大步。</p><p><img src="https://upload-images.jianshu.io/upload_images/1179389-22ed8367a864013b?imageMogr2/auto-orient/strip|imageView2/2/w/1240" alt=""></p><ul><li><p>**建立知识体系：**从 JVM 的内存结构到垃圾收集的算法和收集器，学习 GC 的基础知识，掌握一些常用的 GC 问题分析工具。</p></li><li><p>**确定评价指标：**了解基本 GC 的评价方法，摸清如何设定独立系统的指标，以及在业务场景中判断 GC 是否存在问题的手段。</p></li><li><p>**场景调优实践：**运用掌握的知识和系统评价指标，分析与解决九种 CMS 中常见 GC 问题场景。</p></li><li><p>**总结优化经验：**对整体过程做总结并提出笔者的几点建议，同时将总结到的经验完善到知识体系之中。</p></li></ul><p><strong>2. GC 基础</strong></p><p>在正式开始前，先做些简要铺垫，介绍下 JVM 内存划分、收集算法、收集器等常用概念介绍，基础比较好的同学可以直接跳过这部分。</p><p><strong>2.1 基础概念</strong></p><ul><li><p>**GC：**GC 本身有三种语义，下文需要根据具体场景带入不同的语义：</p></li><li><p><strong>Garbage Collection</strong>：垃圾收集技术，名词。</p></li><li><p><strong>Garbage Collector</strong>：垃圾收集器，名词。</p></li><li><p><strong>Garbage Collecting</strong>：垃圾收集动作，动词。</p></li><li><p>**Mutator：**生产垃圾的角色，也就是我们的应用程序，垃圾制造者，通过 Allocator 进行 allocate 和 free。</p></li><li><p>**TLAB：**Thread Local Allocation Buffer 的简写，基于 CAS 的独享线程（Mutator Threads）可以优先将对象分配在 Eden 中的一块内存，因为是 Java 线程独享的内存区没有锁竞争，所以分配速度更快，每个 TLAB 都是一个线程独享的。</p></li><li><p>**Card Table：**中文翻译为卡表，主要是用来标记卡页的状态，每个卡表项对应一个卡页。当卡页中一个对象引用有写操作时，写屏障将会标记对象所在的卡表状态改为 dirty，卡表的本质是用来解决跨代引用的问题。具体怎么解决的可以参考 StackOverflow 上的这个问题 <a href="https://stackoverflow.com/questions/19154607/how-actually-card-table-and-writer-barrier-works" target="_blank" rel="noopener noreferrer">how-actually-card-table-and-writer-barrier-works<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，或者研读一下 cardTableRS.app 中的源码。</p></li></ul><p><strong>2.2 JVM 内存划分</strong></p><p>从 JCP（Java Community Process）的官网中可以看到，目前 Java 版本最新已经到了 Java 16，未来的 Java 17 以及现在的 Java 11 和 Java 8 是 LTS 版本，JVM 规范也在随着迭代在变更，由于本文主要讨论 CMS，此处还是放 Java 8 的内存结构。</p><p><img src="https://upload-images.jianshu.io/upload_images/1179389-5379d37a996aabf9?imageMogr2/auto-orient/strip|imageView2/2/w/1240" alt=""></p><p>GC 主要工作在 Heap 区和 MetaSpace 区（上图蓝色部分），在 Direct Memory 中，如果使用的是 DirectByteBuffer，那么在分配内存不够时则是 GC 通过 <code>Cleaner#clean</code> 间接管理。</p><p>任何自动内存管理系统都会面临的步骤：为新对象分配空间，然后收集垃圾对象空间，下面我们就展开介绍一下这些基础知识。</p><p><strong>2.3 分配对象</strong></p><p>Java 中对象地址操作主要使用 Unsafe 调用了 C 的 allocate 和 free 两个方法，分配方法有两种：</p><ul><li><p>**空闲链表（free list）：**通过额外的存储记录空闲的地址，将随机 IO 变为顺序 IO，但带来了额外的空间消耗。</p></li><li><p>**碰撞指针（bump  pointer）：**通过一个指针作为分界点，需要分配内存时，仅需把指针往空闲的一端移动与对象大小相等的距离，分配效率较高，但使用场景有限。</p></li></ul><p><strong>2.4 收集对象</strong></p><p><strong>2.4.1 识别垃圾</strong></p><ul><li><p>**引用计数法（Reference Counting）：**对每个对象的引用进行计数，每当有一个地方引用它时计数器 +1、引用失效则 -1，引用的计数放到对象头中，大于 0 的对象被认为是存活对象。虽然循环引用的问题可通过 Recycler 算法解决，但是在多线程环境下，引用计数变更也要进行昂贵的同步操作，性能较低，早期的编程语言会采用此算法。</p></li><li><p>**可达性分析，又称引用链法（Tracing GC）：**从 GC Root 开始进行对象搜索，可以被搜索到的对象即为可达对象，此时还不足以判断对象是否存活/死亡，需要经过多次标记才能更加准确地确定，整个连通图之外的对象便可以作为垃圾被回收掉。目前 Java 中主流的虚拟机均采用此算法。</p></li></ul><p>备注：引用计数法是可以处理循环引用问题的，下次面试时不要再这么说啦~ ~</p><p><strong>2.4.2 收集算法</strong></p><p>自从有自动内存管理出现之时就有的一些收集算法，不同的收集器也是在不同场景下进行组合。</p><ul><li><p>**Mark-Sweep（标记-清除）：**回收过程主要分为两个阶段，第一阶段为追踪（Tracing）阶段，即从 GC Root 开始遍历对象图，并标记（Mark）所遇到的每个对象，第二阶段为清除（Sweep）阶段，即回收器检查堆中每一个对象，并将所有未被标记的对象进行回收，整个过程不会发生对象移动。整个算法在不同的实现中会使用三色抽象（Tricolour Abstraction）、位图标记（BitMap）等技术来提高算法的效率，存活对象较多时较高效。</p></li><li><p>**Mark-Compact （标记-整理）：**这个算法的主要目的就是解决在非移动式回收器中都会存在的碎片化问题，也分为两个阶段，第一阶段与 Mark-Sweep 类似，第二阶段则会对存活对象按照整理顺序（Compaction Order）进行整理。主要实现有双指针（Two-Finger）回收算法、滑动回收（Lisp2）算法和引线整理（Threaded Compaction）算法等。</p></li><li><p>**Copying（复制）：**将空间分为两个大小相同的 From 和 To 两个半区，同一时间只会使用其中一个，每次进行回收时将一个半区的存活对象通过复制的方式转移到另一个半区。有递归（Robert R. Fenichel 和 Jerome C. Yochelson提出）和迭代（Cheney 提出）算法，以及解决了前两者递归栈、缓存行等问题的近似优先搜索算法。复制算法可以通过碰撞指针的方式进行快速地分配内存，但是也存在着空间利用率不高的缺点，另外就是存活对象比较大时复制的成本比较高。</p></li></ul><p>三种算法在是否移动对象、空间和时间方面的一些对比，假设存活对象数量为 <em>L</em>、堆空间大小为 <em>H</em>，则：</p><p><img src="https://upload-images.jianshu.io/upload_images/1179389-03f497067b9ff350?imageMogr2/auto-orient/strip|imageView2/2/w/1240" alt=""></p><p>把 mark、sweep、compaction、copying 这几种动作的耗时放在一起看，大致有这样的关系：</p><p><img src="https://upload-images.jianshu.io/upload_images/1179389-a1c69e01cb02c636?imageMogr2/auto-orient/strip|imageView2/2/w/1240" alt=""></p><p>虽然 compaction 与 copying 都涉及移动对象，但取决于具体算法，compaction 可能要先计算一次对象的目标地址，然后修正指针，最后再移动对象。copying 则可以把这几件事情合为一体来做，所以可以快一些。另外，还需要留意 GC 带来的开销不能只看 Collector 的耗时，还得看 Allocator 。如果能保证内存没碎片，分配就可以用 pointer bumping 方式，只需要挪一个指针就完成了分配，非常快。而如果内存有碎片就得用 freelist 之类的方式管理，分配速度通常会慢一些。</p><p><strong>2.5 收集器</strong></p><p>目前在 Hotspot VM 中主要有分代收集和分区收集两大类，具体可以看下面的这个图，不过未来会逐渐向分区收集发展。在美团内部，有部分业务尝试用了 ZGC（感兴趣的同学可以学习下这篇文章《<a href="http://mp.weixin.qq.com/s?__biz=MjM5NjQ5MTI5OA==&amp;mid=2651752559&amp;idx=1&amp;sn=c720b67e93db1885d72dab8799bba78c&amp;chksm=bd1251228a65d834db610deb2ce55003e0fc1f90793e84873096db19027936f6add301242545&amp;scene=21#wechat_redirect" target="_blank" rel="noopener noreferrer">新一代垃圾回收器ZGC的探索与实践<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>》），其余基本都停留在 CMS 和 G1 上。另外在 JDK11 后提供了一个不执行任何垃圾回收动作的回收器 Epsilon（A No-Op Garbage Collector）用作性能分析。另外一个就是 Azul 的 Zing JVM，其 C4（Concurrent Continuously Compacting Collector）收集器也在业内有一定的影响力。</p><p><img src="https://upload-images.jianshu.io/upload_images/1179389-6c3339b84c2861cf?imageMogr2/auto-orient/strip|imageView2/2/w/1240" alt=""></p><p>备注：值得一提的是，早些年国内 GC 技术的布道者 RednaxelaFX （江湖人称 R 大）曾就职于 Azul，本文的一部分材料也参考了他的一些文章。</p><p><strong>2.5.1 分代收集器</strong></p><ul><li><p>**ParNew：**一款多线程的收集器，采用复制算法，主要工作在 Young 区，可以通过 <code>-XX:ParallelGCThreads</code> 参数来控制收集的线程数，整个过程都是 STW 的，常与 CMS 组合使用。</p></li><li><p>**CMS：**以获取最短回收停顿时间为目标，采用“标记-清除”算法，分 4 大步进行垃圾收集，其中初始标记和重新标记会 STW ，多数应用于互联网站或者 B/S 系统的服务器端上，JDK9 被标记弃用，JDK14 被删除，详情可见 <a href="https://openjdk.java.net/jeps/363" target="_blank" rel="noopener noreferrer">JEP 363<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>。</p></li></ul><h4 id="_2-5-2-分区收集器" tabindex="-1"><a class="header-anchor" href="#_2-5-2-分区收集器" aria-hidden="true">#</a> 2.5.2 分区收集器</h4><ul><li><p>**G1：**一种服务器端的垃圾收集器，应用在多处理器和大容量内存环境中，在实现高吞吐量的同时，尽可能地满足垃圾收集暂停时间的要求。</p></li><li><p>**ZGC：**JDK11 中推出的一款低延迟垃圾回收器，适用于大内存低延迟服务的内存管理和回收，SPECjbb 2015 基准测试，在 128G 的大堆下，最大停顿时间才 1.68 ms，停顿时间远胜于 G1 和 CMS。</p></li><li><p>**Shenandoah：**由 Red Hat 的一个团队负责开发，与 G1 类似，基于 Region 设计的垃圾收集器，但不需要 Remember Set 或者 Card Table 来记录跨 Region 引用，停顿时间和堆的大小没有任何关系。停顿时间与 ZGC 接近，下图为与 CMS 和 G1 等收集器的 benchmark。</p></li></ul><p><img src="https://upload-images.jianshu.io/upload_images/1179389-238d04be0f931ddc?imageMogr2/auto-orient/strip|imageView2/2/w/1240" alt=""></p><p><strong>2.5.3 常用收集器</strong></p><p>目前使用最多的是 CMS 和 G1 收集器，二者都有分代的概念，主要内存结构如下：</p><p><img src="https://upload-images.jianshu.io/upload_images/1179389-8082240b37153163.gif?imageMogr2/auto-orient/strip|imageView2/2/w/1240" alt=""></p><p><strong>2.5.4 其他收集器</strong></p><p>以上仅列出常见收集器，除此之外还有很多，如 Metronome、Stopless、Staccato、Chicken、Clover 等实时回收器，Sapphire、Compressor、Pauseless 等并发复制/整理回收器，Doligez-Leroy-Conthier 等标记整理回收器，由于篇幅原因，不在此一一介绍。</p><p><strong>2.6 常用工具</strong></p><p>工欲善其事，必先利其器，此处列出一些笔者常用的工具，具体情况大家可以自由选择，本文的问题都是使用这些工具来定位和分析的。</p><p><strong>2.6.1 命令行终端</strong></p><ul><li><p><strong>标准终端类</strong>：jps、jinfo、jstat、jstack、jmap</p></li><li><p><strong>功能整合类</strong>：jcmd、vjtools、arthas、greys</p></li></ul><p><strong>2.6.2 可视化界面</strong></p><ul><li><p><strong>简易</strong>：JConsole、JVisualvm、HA、GCHisto、GCViewer</p></li><li><p><strong>进阶</strong>：MAT、JProfiler</p></li></ul><p>命令行推荐 arthas ，可视化界面推荐 JProfiler，此外还有一些在线的平台 <a href="https://gceasy.io/" target="_blank" rel="noopener noreferrer">gceasy<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>、<a href="https://heaphero.io/" target="_blank" rel="noopener noreferrer">heaphero<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>、<a href="https://fastthread.io/" target="_blank" rel="noopener noreferrer">fastthread<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a> ，美团内部的 Scalpel（一款自研的 JVM 问题诊断工具，暂时未开源）也比较好用。</p><p><strong>3. GC 问题判断</strong></p><p>在做 GC 问题排查和优化之前，我们需要先来明确下到底是不是 GC 直接导致的问题，或者应用代码导致的 GC 异常，最终出现问题。</p><p><strong>3.1 判断 GC 有没有问题？</strong></p><p><strong>3.1.1 设定评价标准</strong></p><p>评判 GC 的两个核心指标：</p><ul><li><p>**延迟（Latency）：**也可以理解为最大停顿时间，即垃圾收集过程中一次 STW 的最长时间，越短越好，一定程度上可以接受频次的增大，GC 技术的主要发展方向。</p></li><li><p>**吞吐量（Throughput）：**应用系统的生命周期内，由于 GC 线程会占用 Mutator 当前可用的 CPU 时钟周期，吞吐量即为 Mutator 有效花费的时间占系统总运行时间的百分比，例如系统运行了 100 min，GC 耗时 1 min，则系统吞吐量为 99%，吞吐量优先的收集器可以接受较长的停顿。</p></li></ul><p>目前各大互联网公司的系统基本都更追求低延时，避免一次 GC 停顿的时间过长对用户体验造成损失，衡量指标需要结合一下应用服务的 SLA，主要如下两点来判断：</p><p><img src="https://upload-images.jianshu.io/upload_images/1179389-0116d4ae68567826?imageMogr2/auto-orient/strip|imageView2/2/w/1240" alt=""></p><p>简而言之，即为<strong>一次停顿的时间不超过应用服务的 TP9999，GC 的吞吐量不小于 99.99%</strong>。举个例子，假设某个服务 A 的 TP9999 为 80 ms，平均 GC 停顿为 30 ms，那么该服务的最大停顿时间最好不要超过 80 ms，GC 频次控制在 5 min 以上一次。如果满足不了，那就需要调优或者通过更多资源来进行并联冗余。（大家可以先停下来，看看监控平台上面的 gc.meantime 分钟级别指标，如果超过了 6 ms 那单机 GC 吞吐量就达不到 4 个 9 了。）</p><p>备注：除了这两个指标之外还有 Footprint（资源量大小测量）、反应速度等指标，互联网这种实时系统追求低延迟，而很多嵌入式系统则追求 Footprint。</p><p><strong>3.1.2 读懂 GC Cause</strong></p><p>拿到 GC 日志，我们就可以简单分析 GC 情况了，通过一些工具，我们可以比较直观地看到 Cause 的分布情况，如下图就是使用 gceasy 绘制的图表：</p><p><img src="https://upload-images.jianshu.io/upload_images/1179389-955a1b25ed4cf223?imageMogr2/auto-orient/strip|imageView2/2/w/1240" alt=""></p><p>如上图所示，我们很清晰的就能知道是什么原因引起的 GC，以及每次的时间花费情况，但是要分析 GC 的问题，先要读懂 GC Cause，即 JVM 什么样的条件下选择进行 GC 操作，具体 Cause 的分类可以看一下 Hotspot 源码：src/share/vm/gc/shared/gcCause.hpp 和 src/share/vm/gc/shared/gcCause.cpp 中。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>const char* GCCause::to_string(GCCause::Cause cause) {
   switch (cause) {
     case _java_lang_system_gc:
       return &quot;System.gc()&quot;;
@@ -888,6 +888,6 @@ JNIEXPORT void JNICALL Java_GCLockerTest_release(JNIEnv* env, jclass klass, jint
 (*env)-&gt;ReleasePrimitiveArrayCritical(env, arr, sink, 0);
 }
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>运行该 JNI 程序，可以看到发生的 GC 都是 GCLocker Initiated GC，并且注意在 “Acquired” 和 “Released” 时不可能发生 GC。</p><p><img src="https://upload-images.jianshu.io/upload_images/1179389-be1f08f7671866b1?imageMogr2/auto-orient/strip|imageView2/2/w/1240" alt=""></p><p>GC Locker 可能导致的不良后果有：</p><ul><li><p>如果此时是 Young 区不够 Allocation Failure 导致的 GC，由于无法进行 Young GC，会将对象直接分配至 Old 区。</p></li><li><p>如果 Old 区也没有空间了，则会等待锁释放，导致线程阻塞。</p></li><li><p>可能触发额外不必要的 Young GC，JDK 有一个 Bug，有一定的几率，本来只该触发一次 GCLocker Initiated GC 的 Young GC，实际发生了一次 Allocation Failure GC 又紧接着一次 GCLocker Initiated GC。是因为 GCLocker Initiated GC 的属性被设为 full，导致两次 GC 不能收敛。</p></li></ul><p><strong>4.9.3 策略</strong></p><ul><li>添加 <code>-XX+PrintJNIGCStalls</code> 参数，可以打印出发生 JNI 调用时的线程，进一步分析，找到引发问题的 JNI 调用。</li><li>JNI 调用需要谨慎，不一定可以提升性能，反而可能造成 GC 问题。</li><li>升级 JDK 版本到 14，避免 <a href="https://bugs.openjdk.java.net/browse/JDK-8048556" target="_blank" rel="noopener noreferrer">JDK-8048556<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a> 导致的重复 GC。</li></ul><p><img src="https://upload-images.jianshu.io/upload_images/1179389-dc4a53598d2ffd0a.gif?imageMogr2/auto-orient/strip|imageView2/2/w/1240" alt=""></p><p><strong>4.9.4 小结</strong></p><p>JNI 产生的 GC 问题较难排查，需要谨慎使用。</p><p><strong>5. 总结</strong></p><p>在这里，我们把整个文章内容总结一下，方便大家整体地理解回顾。</p><p><strong>5.1 处理流程（SOP）</strong></p><p>下图为整体 GC 问题普适的处理流程，重点的地方下面会单独标注，其他的基本都是标准处理流程，此处不再赘述，最后在整个问题都处理完之后有条件的话建议做一下复盘。</p><p><img src="https://upload-images.jianshu.io/upload_images/1179389-06b02637605cdf5f?imageMogr2/auto-orient/strip|imageView2/2/w/1240" alt=""></p><ul><li><p>**制定标准：**这块内容其实非常重要，但大部分系统都是缺失的，笔者过往面试的同学中只有不到一成的同学能给出自己的系统 GC 标准到底什么样，其他的都是用的统一指标模板，缺少预见性，具体指标制定可以参考 3.1 中的内容，需要结合应用系统的 TP9999 时间和延迟、吞吐量等设定具体的指标，而不是被问题驱动。</p></li><li><p>**保留现场：**目前线上服务基本都是分布式服务，某个节点发生问题后，如果条件允许一定不要直接操作重启、回滚等动作恢复，优先通过摘掉流量的方式来恢复，这样我们可以将堆、栈、GC 日志等关键信息保留下来，不然错过了定位根因的时机，后续解决难度将大大增加。当然除了这些，应用日志、中间件日志、内核日志、各种 Metrics 指标等对问题分析也有很大帮助。</p></li><li><p>**因果分析：**判断 GC 异常与其他系统指标异常的因果关系，可以参考笔者在 3.2 中介绍的时序分析、概率分析、实验分析、反证分析等 4 种因果分析法，避免在排查过程中走入误区。</p></li><li><p>**根因分析：**确实是 GC 的问题后，可以借助上文提到的工具并通过 5 Why 根因分析法以及跟第三节中的九种常见的场景进行逐一匹配，或者直接参考下文的根因鱼骨图，找出问题发生根因，最后再选择优化手段。</p></li></ul><p><strong>5.2 根因鱼骨图</strong></p><p>送上一张问题根因鱼骨图，一般情况下我们在处理一个 GC 问题时，只要能定位到问题的“病灶”，有的放矢，其实就相当于解决了 80%，如果在某些场景下不太好定位，大家可以借助这种根因分析图通过<strong>排除法</strong>去定位。</p><p><img src="https://upload-images.jianshu.io/upload_images/1179389-7dd5d0e42488ebaa?imageMogr2/auto-orient/strip|imageView2/2/w/1240" alt=""></p><p><strong>5.3 调优建议</strong></p><ul><li><p>**Trade Off：**与 CAP 注定要缺一角一样，GC 优化要在延迟（Latency）、吞吐量（Throughput）、容量（Capacity）三者之间进行权衡。</p></li><li><p>**最终手段：**GC 发生问题不是一定要对 JVM 的 GC 参数进行调优，大部分情况下是通过 GC 的情况找出一些业务问题，切记上来就对 GC 参数进行调整，当然有明确配置错误的场景除外。</p></li><li><p>**控制变量：**控制变量法是在蒙特卡洛（Monte Carlo）方法中用于减少方差的一种技术方法，我们调优的时候尽量也要使用，每次调优过程尽可能只调整一个变量。</p></li><li><p>**善用搜索：**理论上 99.99% 的 GC 问题基本都被遇到了，我们要学会使用搜索引擎的高级技巧，重点关注 StackOverFlow、Github 上的 Issue、以及各种论坛博客，先看看其他人是怎么解决的，会让解决问题事半功倍。能看到这篇文章，你的搜索能力基本过关了~</p></li><li><p>**调优重点：**总体上来讲，我们开发的过程中遇到的问题类型也基本都符合正态分布，太简单或太复杂的基本遇到的概率很低，笔者这里将中间最重要的三个场景添加了“*”标识，希望阅读完本文之后可以观察下自己负责的系统，是否存在上述问题。</p></li><li><p>**GC 参数：**如果堆、栈确实无法第一时间保留，一定要保留 GC 日志，这样我们最起码可以看到 GC Cause，有一个大概的排查方向。关于 GC 日志相关参数，最基本的 <code>-XX:+HeapDumpOnOutOfMemoryError</code> 等一些参数就不再提了，笔者建议添加以下参数，可以提高我们分析问题的效率。</p></li></ul><p><img src="https://upload-images.jianshu.io/upload_images/1179389-28d7362e83e88266?imageMogr2/auto-orient/strip|imageView2/2/w/1240" alt=""></p><ul><li><p>**其他建议：**上文场景中没有提到，但是对 GC 性能也有提升的一些建议。</p></li><li><p>**主动式 GC：**也有另开生面的做法，通过监控手段监控观测 Old 区的使用情况，即将到达阈值时将应用服务摘掉流量，手动触发一次 Major GC，减少 CMS GC 带来的停顿，但随之系统的健壮性也会减少，如非必要不建议引入。</p></li><li><p><strong>禁用偏向锁：<strong>偏向锁在只有一个线程使用到该锁的时候效率很高，但是在竞争激烈情况会升级成轻量级锁，此时就需要先</strong>消除偏向锁，这个过程是 STW</strong> 的。如果每个同步资源都走这个升级过程，开销会非常大，所以在已知并发激烈的前提下，一般会禁用偏向锁 <code>-XX:-UseBiasedLocking</code> 来提高性能。</p></li><li><p>**虚拟内存：**启动初期有些操作系统（例如 Linux）并没有真正分配物理内存给 JVM ，而是在虚拟内存中分配，使用的时候才会在物理内存中分配内存页，这样也会导致 GC 时间较长。这种情况可以添加 <code>-XX:+AlwaysPreTouch</code> 参数，让 VM 在 commit 内存时跑个循环来强制保证申请的内存真的 commit，避免运行时触发缺页异常。在一些大内存的场景下，有时候能将前几次的 GC 时间降一个数量级，但是添加这个参数后，启动的过程可能会变慢。</p></li></ul><p><strong>6. 写在最后</strong></p><p>最后，再说笔者个人的一些小建议，遇到一些 GC 问题，如果有精力，一定要探本穷源，找出最深层次的原因。另外，在这个信息泛滥的时代，有一些被“奉为圭臬”的经验可能都是错误的，尽量养成看源码的习惯，有一句话说到“源码面前，了无秘密”，也就意味着遇到搞不懂的问题，我们可以从源码中一窥究竟，某些场景下确有奇效。但也不是只靠读源码来学习，如果硬啃源码但不理会其背后可能蕴含的理论基础，那很容易“捡芝麻丢西瓜”，“只见树木，不见森林”，让“了无秘密”变成了一句空话，我们还是要结合一些实际的业务场景去针对性地学习。</p><p><strong>你的时间在哪里，你的成就就会在哪里</strong>。笔者也是在前两年才开始逐步地在 GC 方向上不断深入，查问题、看源码、做总结，每个 Case 形成一个小的闭环，目前初步摸到了 GC 问题处理的一些门道，同时将经验总结应用于生产环境实践，慢慢地形成一个良性循环。</p><p>本篇文章主要是介绍了 CMS GC 的一些常见场景分析，另外一些，如 CodeCache 问题导致 JIT 失效、SafePoint 就绪时间长、Card Table 扫描耗时等问题不太常见就没有花太多篇幅去讲解。Java GC 是在“分代”的思想下内卷了很多年才突破到了“分区”，目前在美团也已经开始使用 G1 来替换使用了多年的 CMS，虽然在小的堆方面 G1 还略逊色于 CMS，但这是一个趋势，短时间无法升级到 ZGC，所以未来遇到的 G1 的问题可能会逐渐增多。目前已经收集到 Remember Set 粗化、Humongous 分配、Ergonomics 异常、Mixed GC 中 Evacuation Failure 等问题，除此之外也会给出 CMS 升级到 G1 的一些建议，接下来笔者将继续完成这部分文章整理，敬请期待。</p><p>“防火”永远要胜于“救火”，<strong>不放过任何一个异常的小指标</strong>（一般来说，任何<strong>不平滑的曲线</strong>都是值得怀疑的） ，就有可能避免一次故障的发生。作为 Java 程序员基本都会遇到一些 GC 的问题，独立解决 GC 问题是我们必须迈过的一道坎。开篇中也提到过 GC 作为经典的技术，非常值得我们学习，一些 GC 的学习材料，如《The Garbage Collection Handbook》、《深入理解Java虚拟机》等也是常读常新，赶紧动起来，苦练 GC 基本功吧。</p><p>最后的最后，再多啰嗦一句，目前所有 GC 调优相关的文章，第一句讲的就是“不要过早优化”，使得很多同学对 GC 优化望而却步。在这里笔者提出不一样的观点，熵增定律（在一个孤立系统里，如果没有外力做功，其总混乱度（即熵）会不断增大）在计算机系统同样适用，<strong>如果不主动做功使熵减，系统终究会脱离你的掌控</strong>，在我们对业务系统和 GC 原理掌握得足够深的时候，可以放心大胆地做优化，因为我们基本可以预测到每一个操作的结果，放手一搏吧，少年！</p><p>原文链接：https://mp.weixin.qq.com/s/RFwXYdzeRkTG5uaebVoLQw</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/jvm/meituan-9-gc.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" 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aria-label="一、前言"><!---->一、前言<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">二、Java核心</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.1 Java概述</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.2 Java基础语法</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.3 面向对象编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.4 字符串&amp;数组</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.5 集合框架（容器）</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.6 IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.11 并发编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">2.12 JVM</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/jvm/what-is-jvm.html" class="nav-link sidebar-link sidebar-page" aria-label="JVM到底是什么？"><!---->JVM到底是什么？<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/how-run-java-code.html" class="nav-link sidebar-link sidebar-page" aria-label="JVM到底是如何运行Java代码的"><!---->JVM到底是如何运行Java代码的<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/class-load.html" class="nav-link sidebar-link sidebar-page" aria-label="类加载机制"><!---->类加载机制<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/class-file-jiegou.html" class="nav-link sidebar-link sidebar-page" aria-label="详解Java的类文件结构"><!---->详解Java的类文件结构<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/bytecode.html" class="nav-link sidebar-link sidebar-page" aria-label="从javap的角度轻松看懂字节码"><!---->从javap的角度轻松看懂字节码<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/zijiema-zhiling.html" class="nav-link sidebar-link sidebar-page" aria-label="字节码指令详解"><!---->字节码指令详解<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/how-jvm-run-zijiema-zhiling.html" class="nav-link sidebar-link sidebar-page" aria-label="虚拟机是如何执行字节码指令的"><!---->虚拟机是如何执行字节码指令的<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/hsdb.html" class="nav-link sidebar-link sidebar-page" aria-label="HSDB（Hotspot Debugger）"><!---->HSDB（Hotspot Debugger）<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/asm.html" class="nav-link sidebar-link sidebar-page" aria-label="史上最通俗易懂的ASM教程"><!---->史上最通俗易懂的ASM教程<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/compile-jdk.html" class="nav-link sidebar-link sidebar-page" aria-label="自己编译JDK"><!---->自己编译JDK<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/jvm/neicun-jiegou.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="深入理解JVM的内存结构"><!---->深入理解JVM的内存结构<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/neicun-jiegou.html#_01、程序计数器" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="01、程序计数器"><!---->01、程序计数器<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/neicun-jiegou.html#_02、java-虚拟机栈" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="02、Java 虚拟机栈"><!---->02、Java 虚拟机栈<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/neicun-jiegou.html#_04、堆" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="04、堆"><!---->04、堆<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/neicun-jiegou.html#_05、元空间" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="05、元空间"><!---->05、元空间<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/jvm/whereis-the-object.html" class="nav-link sidebar-link sidebar-page" aria-label="Java 创建的对象到底放在哪"><!---->Java 创建的对象到底放在哪<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/gc.html" class="nav-link sidebar-link sidebar-page" aria-label="从头到尾说一次Java垃圾回收"><!---->从头到尾说一次Java垃圾回收<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/tujie-gc.html" class="nav-link sidebar-link sidebar-page" aria-label="图解Java的垃圾回收机制"><!---->图解Java的垃圾回收机制<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/problem-tools.html" class="nav-link sidebar-link sidebar-page" aria-label="Java问题诊断和排查工具"><!---->Java问题诊断和排查工具<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/jit.html" class="nav-link sidebar-link sidebar-page" aria-label="JIT原理解析及实践"><!---->JIT原理解析及实践<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/oom.html" class="nav-link sidebar-link sidebar-page" aria-label="内存溢出排查优化实战"><!---->内存溢出排查优化实战<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/cpu-percent-100.html" class="nav-link sidebar-link sidebar-page" aria-label="CPU 100% 排查优化实践"><!---->CPU 100% 排查优化实践<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/zongjie.html" class="nav-link sidebar-link sidebar-page" aria-label="JVM 核心知识点总结"><!---->JVM 核心知识点总结<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->深入理解JVM的内存结构</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 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0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><li class="category category1" role>JVM</li><meta property="articleSection" content="Java核心,JVM"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 8 分钟</span><meta property="timeRequired" content="PT8M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/neicun-jiegou.html#_01、程序计数器" class="router-link-active router-link-exact-active toc-link level3">01、程序计数器</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/neicun-jiegou.html#_02、java-虚拟机栈" class="router-link-active router-link-exact-active toc-link level3">02、Java 虚拟机栈</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/neicun-jiegou.html#_04、堆" class="router-link-active router-link-exact-active toc-link level3">04、堆</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/neicun-jiegou.html#_05、元空间" class="router-link-active router-link-exact-active toc-link level3">05、元空间</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="深入理解jvm的内存结构" tabindex="-1"><a class="header-anchor" href="#深入理解jvm的内存结构" aria-hidden="true">#</a> 深入理解JVM的内存结构</h1><p>在谈 JVM 内存区域划分之前，我们先来看一下 Java 程序的具体执行过程，我画了一幅图。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/neicun-jiegou-dac0f4c1-8a7e-4309-a599-5664cdaf5016.png" alt=""></p><p>Java 源代码文件经过编译器编译后生成字节码文件，然后交给 JVM 的类加载器，加载完毕后，交给执行引擎执行。在整个执行的过程中，JVM 会用一块空间来存储程序执行期间需要用到的数据，这块空间一般被称为运行时数据区，也就是常说的 JVM 内存。</p><p>所以，当我们在谈 JVM 内存区域划分的时候，其实谈的就是这块空间——运行时数据区。</p><p>大家应该对官方出品的《Java 虚拟机规范》有所了解吧？了解这个规范可以让我们更深入地理解 JVM。该规范主要包含 6 个部分，分别是：</p><ul><li>第一章：引言</li><li>第二章：Java 虚拟机结构</li><li>第三章：Java 虚拟机编译</li><li>第四章：<a href="https://mp.weixin.qq.com/s/uMEZ2Xwctx4n-_8zvtDp5A" target="_blank" rel="noopener noreferrer">Class 文件<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li>第五章：加载、链接和初始化</li><li>第六章：Java 虚拟机指令集</li><li>第七章：操作码</li></ul><p>根据第二章 Java 虚拟机结构中的规定，运行时数据区可以分为以下几个部分，见下图。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/neicun-jiegou-e33179f3-275b-44c9-87f6-802198f8f360.png" alt=""></p><h3 id="_01、程序计数器" tabindex="-1"><a class="header-anchor" href="#_01、程序计数器" aria-hidden="true">#</a> 01、程序计数器</h3><p>程序计数器（Program Counter Register）所占的内存空间不大，很小一块，可以看作是当前线程所执行的字节码指令的行号指示器。字节码解释器会在工作的时候改变这个计数器的值来选取下一条需要执行的字节码指令，像分支、循环、跳转、异常处理、线程恢复等功能都需要依赖这个计数器来完成。</p><p>在 JVM 中，多线程是通过线程轮流切换来获得 CPU 执行时间的，因此，在任一具体时刻，一个 CPU 的内核只会执行一条线程中的指令，因此，为了线程切换后能恢复到正确的执行位置，每个线程都需要有一个独立的程序计数器，并且不能互相干扰，否则就会影响到程序的正常执行次序。</p><p>也就是说，我们要求程序计数器是线程私有的。</p><p>《Java 虚拟机规范》中规定，如果线程执行的是非本地（native）方法，则程序计数器中保存的是当前需要执行的指令地址；如果线程执行的是本地方法，则程序计数器中的值是 undefined。</p><p>为什么本地方法在程序计数器中的值是 undefined 的？因为本地方法大多是通过 C/C++ 实现的，并未编译成需要执行的字节码指令。</p><p>由于程序计数器中存储的数据所占的空间不会随程序的执行而发生大小上的改变，因此，程序计数器是不会发生内存溢出现象（OutOfMemory）的。</p><h3 id="_02、java-虚拟机栈" tabindex="-1"><a class="header-anchor" href="#_02、java-虚拟机栈" aria-hidden="true">#</a> 02、Java 虚拟机栈</h3><p>Java 虚拟机栈中是一个个栈帧，每个栈帧对应一个被调用的方法。当线程执行一个方法时，会创建一个对应的栈帧，并将栈帧压入栈中。当方法执行完毕后，将栈帧从栈中移除。<a href="https://mp.weixin.qq.com/s/fc48Z5tSMlBHweYIS1UL0g" target="_blank" rel="noopener noreferrer">栈<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>遵循的是后进先出的原则，所以线程当前执行的方法对应的栈帧必定在 Java 虚拟机栈的顶部。</p><p>栈帧包含以下 5 个部分，见下图。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/neicun-jiegou-4ea2a60a-05df-4ed1-8109-99ae23acefd1.png" alt=""></p><p><a href="https://tobebetterjavaer.com/jvm/how-jvm-run-zijiema-zhiling.md" target="_blank" rel="noopener noreferrer">Java 虚拟机栈<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><h3 id="_04、堆" tabindex="-1"><a class="header-anchor" href="#_04、堆" aria-hidden="true">#</a> 04、堆</h3><p>堆是所有线程共享的一块内存区域，在 Java 虚拟机启动的时候创建，用来存储对象（数组也是一种对象）。</p><p>以前，Java 中“几乎”所有的对象都会在堆中分配，但随着 JIT（Just-In-Time）编译器的发展和逃逸技术的逐渐成熟，所有的对象都分配到堆上渐渐变得不那么“绝对”了。从 JDK 7 开始，Java 虚拟机已经默认开启逃逸分析了，意味着如果某些方法中的对象引用没有被返回或者未被外面使用（也就是未逃逸出去），那么对象可以直接在栈上分配内存。</p><p>简单解释一下 JIT 和逃逸分析。</p><p>常见的编译型语言如 C++，通常会把代码直接编译成 CPU 所能理解的机器码来运行。而 Java 为了实现“一次编译，处处运行”的特性，把编译的过程分成两部分，首先它会先由 javac 编译成通用的中间形式——字节码，然后再由解释器逐条将字节码解释为机器码来执行。所以在性能上，Java 可能会干不过 C++ 这类编译型语言。</p><p>为了优化 Java 的性能 ，JVM 在解释器之外引入了 JIT 编译器：当程序运行时，解释器首先发挥作用，代码可以直接执行。随着时间推移，即时编译器逐渐发挥作用，把越来越多的代码编译优化成本地代码，来获取更高的执行效率。解释器这时可以作为编译运行的降级手段，在一些不可靠的编译优化出现问题时，再切换回解释执行，保证程序可以正常运行。</p><p>逃逸分析（Escape Analysis），简单来讲就是，Hotspot 虚拟机可以分析新创建对象的使用范围，并决定是否在 Java 堆上分配内存的一项技术。</p><p>堆是 Java 垃圾收集器管理的主要区域，因此也被称作 GC 堆（Garbage Collected Heap）。从垃圾回收的角度来看，由于垃圾收集器基本都采用了分代垃圾收集的算法，所以堆还可以细分为：新生代和老年代。新生代还可以细分为：Eden 空间、From Survivor、To Survivor 空间等。进一步划分的目的是更好地回收内存，或者更快地分配内存。</p><p>堆这最容易出现的就是 OutOfMemoryError 错误，分为以下几种表现形式：</p><ul><li><code>OutOfMemoryError: GC Overhead Limit Exceeded</code>：当 JVM 花太多时间执行垃圾回收并且只能回收很少的堆空间时，就会发生该错误。</li><li><code>java.lang.OutOfMemoryError: Java heap space</code>：假如在创建新的对象时, 堆内存中的空间不足以存放新创建的对象, 就会引发该错误。和本机的物理内存无关，和我们配置的虚拟机内存大小有关！</li></ul><h3 id="_05、元空间" tabindex="-1"><a class="header-anchor" href="#_05、元空间" aria-hidden="true">#</a> 05、元空间</h3><p>JDK 8 的时候，原有的方法区（更准确的说应该是永久代）被彻底移除，取而代之的是元空间。</p><p>我们来说说方法区吧。方法区和堆一样，是线程共享的区域，它用来存储已经被 Java 虚拟机加载的类信息、常量、静态变量，以及便器编译后的代码等。</p><p>在有些地方，方法区也被称为永久代。但其实不能这么理解。</p><blockquote><p>《Java 虚拟机规范》中只规定了有方法区这么一个概念和它的作用，并没有规定如何去实现它。那么不同的 Java 虚拟机可能就会有不同的实现。永久代是 HotSpot 对方法区的一种实现形式。也就是说，永久代只是 HotSpot 中的一个概念，而方法区则是 Java 虚拟机规范中的一个定义，一种规范。</p></blockquote><p>换句话说，方法区和永久代的关系就像是 Java 中接口和类的关系，类实现了接口。</p><p>在方法区中，还有一块非常重要的部分，也就是运行时常量池。在讲 <a href="https://mp.weixin.qq.com/s/uMEZ2Xwctx4n-_8zvtDp5A" target="_blank" rel="noopener noreferrer">class 文件<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>的时候，提到了每个 class 文件都会有个常量池，用来存放字符串常量、类和接口的名字、字段名、常量等等。运行时常量池和 class 文件的常量池是一一对应的，它就是通过 class 文件中的常量池来构建的。</p><p>JDK 7 之前，运行时常量池中包含着字符串常量池，都在方法区。</p><p>JDK 7 的时候，字符串常量池从方法区中拿出来放到了堆中，运行时常量池中的其他东西还在方法区中。</p><p>JDK 8 的时候，HotSpot 移除了永久代，也就是说方法区不存在了，取而代之的是元空间。也就意味着字符串常量池在堆中，运行时常量池跑到了元空间。</p><p>再来说说为什么要将永久代 (PermGen) 或者说方法区替换为元空间 (MetaSpace) 。</p><p>第一，永久代放在 Java 虚拟机中，就会受到 Java 虚拟机内存大小的限制，而元空间使用的是本地内存，也就脱离了 Java 虚拟机内存的限制。</p><p>第二，JDK 8 的时候，在 HotSpot 中融合了 JRockit 虚拟机，而 JRockit 中并没有永久代的概念，因此新的 HotSpot 就没有必要再开辟一块空间来作为永久代了。</p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png"></div><!----><footer 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class="nav-link sidebar-link sidebar-page" aria-label="从头到尾说一次Java垃圾回收"><!---->从头到尾说一次Java垃圾回收<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/tujie-gc.html" class="nav-link sidebar-link sidebar-page" aria-label="图解Java的垃圾回收机制"><!---->图解Java的垃圾回收机制<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/problem-tools.html" class="nav-link sidebar-link sidebar-page" aria-label="Java问题诊断和排查工具"><!---->Java问题诊断和排查工具<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/jit.html" class="nav-link sidebar-link sidebar-page" aria-label="JIT原理解析及实践"><!---->JIT原理解析及实践<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/oom.html" class="nav-link sidebar-link sidebar-page" aria-label="内存溢出排查优化实战"><!---->内存溢出排查优化实战<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/cpu-percent-100.html" class="nav-link sidebar-link sidebar-page" aria-label="CPU 100% 排查优化实践"><!---->CPU 100% 排查优化实践<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/zongjie.html" class="nav-link sidebar-link sidebar-page" aria-label="JVM 核心知识点总结"><!---->JVM 核心知识点总结<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->深入理解JVM的内存结构</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 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class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 8 分钟</span><meta property="timeRequired" content="PT8M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/neicun-jiegou.html#_01、程序计数器" class="router-link-active router-link-exact-active toc-link level3">01、程序计数器</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/neicun-jiegou.html#_02、java-虚拟机栈" class="router-link-active router-link-exact-active toc-link level3">02、Java 虚拟机栈</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/neicun-jiegou.html#_04、堆" class="router-link-active router-link-exact-active toc-link level3">04、堆</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/neicun-jiegou.html#_05、元空间" class="router-link-active router-link-exact-active toc-link level3">05、元空间</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="深入理解jvm的内存结构" tabindex="-1"><a class="header-anchor" href="#深入理解jvm的内存结构" aria-hidden="true">#</a> 深入理解JVM的内存结构</h1><p>在谈 JVM 内存区域划分之前，我们先来看一下 Java 程序的具体执行过程，我画了一幅图。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/neicun-jiegou-dac0f4c1-8a7e-4309-a599-5664cdaf5016.png" alt=""></p><p>Java 源代码文件经过编译器编译后生成字节码文件，然后交给 JVM 的类加载器，加载完毕后，交给执行引擎执行。在整个执行的过程中，JVM 会用一块空间来存储程序执行期间需要用到的数据，这块空间一般被称为运行时数据区，也就是常说的 JVM 内存。</p><p>所以，当我们在谈 JVM 内存区域划分的时候，其实谈的就是这块空间——运行时数据区。</p><p>大家应该对官方出品的《Java 虚拟机规范》有所了解吧？了解这个规范可以让我们更深入地理解 JVM。该规范主要包含 6 个部分，分别是：</p><ul><li>第一章：引言</li><li>第二章：Java 虚拟机结构</li><li>第三章：Java 虚拟机编译</li><li>第四章：<a href="https://mp.weixin.qq.com/s/uMEZ2Xwctx4n-_8zvtDp5A" target="_blank" rel="noopener noreferrer">Class 文件<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li>第五章：加载、链接和初始化</li><li>第六章：Java 虚拟机指令集</li><li>第七章：操作码</li></ul><p>根据第二章 Java 虚拟机结构中的规定，运行时数据区可以分为以下几个部分，见下图。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/neicun-jiegou-e33179f3-275b-44c9-87f6-802198f8f360.png" alt=""></p><h3 id="_01、程序计数器" tabindex="-1"><a class="header-anchor" href="#_01、程序计数器" aria-hidden="true">#</a> 01、程序计数器</h3><p>程序计数器（Program Counter Register）所占的内存空间不大，很小一块，可以看作是当前线程所执行的字节码指令的行号指示器。字节码解释器会在工作的时候改变这个计数器的值来选取下一条需要执行的字节码指令，像分支、循环、跳转、异常处理、线程恢复等功能都需要依赖这个计数器来完成。</p><p>在 JVM 中，多线程是通过线程轮流切换来获得 CPU 执行时间的，因此，在任一具体时刻，一个 CPU 的内核只会执行一条线程中的指令，因此，为了线程切换后能恢复到正确的执行位置，每个线程都需要有一个独立的程序计数器，并且不能互相干扰，否则就会影响到程序的正常执行次序。</p><p>也就是说，我们要求程序计数器是线程私有的。</p><p>《Java 虚拟机规范》中规定，如果线程执行的是非本地（native）方法，则程序计数器中保存的是当前需要执行的指令地址；如果线程执行的是本地方法，则程序计数器中的值是 undefined。</p><p>为什么本地方法在程序计数器中的值是 undefined 的？因为本地方法大多是通过 C/C++ 实现的，并未编译成需要执行的字节码指令。</p><p>由于程序计数器中存储的数据所占的空间不会随程序的执行而发生大小上的改变，因此，程序计数器是不会发生内存溢出现象（OutOfMemory）的。</p><h3 id="_02、java-虚拟机栈" tabindex="-1"><a class="header-anchor" href="#_02、java-虚拟机栈" aria-hidden="true">#</a> 02、Java 虚拟机栈</h3><p>Java 虚拟机栈中是一个个栈帧，每个栈帧对应一个被调用的方法。当线程执行一个方法时，会创建一个对应的栈帧，并将栈帧压入栈中。当方法执行完毕后，将栈帧从栈中移除。<a href="https://mp.weixin.qq.com/s/fc48Z5tSMlBHweYIS1UL0g" target="_blank" rel="noopener noreferrer">栈<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>遵循的是后进先出的原则，所以线程当前执行的方法对应的栈帧必定在 Java 虚拟机栈的顶部。</p><p>栈帧包含以下 5 个部分，见下图。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/neicun-jiegou-4ea2a60a-05df-4ed1-8109-99ae23acefd1.png" alt=""></p><p><a href="https://tobebetterjavaer.com/jvm/how-jvm-run-zijiema-zhiling.md" target="_blank" rel="noopener noreferrer">Java 虚拟机栈<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><h3 id="_04、堆" tabindex="-1"><a class="header-anchor" href="#_04、堆" aria-hidden="true">#</a> 04、堆</h3><p>堆是所有线程共享的一块内存区域，在 Java 虚拟机启动的时候创建，用来存储对象（数组也是一种对象）。</p><p>以前，Java 中“几乎”所有的对象都会在堆中分配，但随着 JIT（Just-In-Time）编译器的发展和逃逸技术的逐渐成熟，所有的对象都分配到堆上渐渐变得不那么“绝对”了。从 JDK 7 开始，Java 虚拟机已经默认开启逃逸分析了，意味着如果某些方法中的对象引用没有被返回或者未被外面使用（也就是未逃逸出去），那么对象可以直接在栈上分配内存。</p><p>简单解释一下 JIT 和逃逸分析。</p><p>常见的编译型语言如 C++，通常会把代码直接编译成 CPU 所能理解的机器码来运行。而 Java 为了实现“一次编译，处处运行”的特性，把编译的过程分成两部分，首先它会先由 javac 编译成通用的中间形式——字节码，然后再由解释器逐条将字节码解释为机器码来执行。所以在性能上，Java 可能会干不过 C++ 这类编译型语言。</p><p>为了优化 Java 的性能 ，JVM 在解释器之外引入了 JIT 编译器：当程序运行时，解释器首先发挥作用，代码可以直接执行。随着时间推移，即时编译器逐渐发挥作用，把越来越多的代码编译优化成本地代码，来获取更高的执行效率。解释器这时可以作为编译运行的降级手段，在一些不可靠的编译优化出现问题时，再切换回解释执行，保证程序可以正常运行。</p><p>逃逸分析（Escape Analysis），简单来讲就是，Hotspot 虚拟机可以分析新创建对象的使用范围，并决定是否在 Java 堆上分配内存的一项技术。</p><p>堆是 Java 垃圾收集器管理的主要区域，因此也被称作 GC 堆（Garbage Collected Heap）。从垃圾回收的角度来看，由于垃圾收集器基本都采用了分代垃圾收集的算法，所以堆还可以细分为：新生代和老年代。新生代还可以细分为：Eden 空间、From Survivor、To Survivor 空间等。进一步划分的目的是更好地回收内存，或者更快地分配内存。</p><p>堆这最容易出现的就是 OutOfMemoryError 错误，分为以下几种表现形式：</p><ul><li><code>OutOfMemoryError: GC Overhead Limit Exceeded</code>：当 JVM 花太多时间执行垃圾回收并且只能回收很少的堆空间时，就会发生该错误。</li><li><code>java.lang.OutOfMemoryError: Java heap space</code>：假如在创建新的对象时, 堆内存中的空间不足以存放新创建的对象, 就会引发该错误。和本机的物理内存无关，和我们配置的虚拟机内存大小有关！</li></ul><h3 id="_05、元空间" tabindex="-1"><a class="header-anchor" href="#_05、元空间" aria-hidden="true">#</a> 05、元空间</h3><p>JDK 8 的时候，原有的方法区（更准确的说应该是永久代）被彻底移除，取而代之的是元空间。</p><p>我们来说说方法区吧。方法区和堆一样，是线程共享的区域，它用来存储已经被 Java 虚拟机加载的类信息、常量、静态变量，以及便器编译后的代码等。</p><p>在有些地方，方法区也被称为永久代。但其实不能这么理解。</p><blockquote><p>《Java 虚拟机规范》中只规定了有方法区这么一个概念和它的作用，并没有规定如何去实现它。那么不同的 Java 虚拟机可能就会有不同的实现。永久代是 HotSpot 对方法区的一种实现形式。也就是说，永久代只是 HotSpot 中的一个概念，而方法区则是 Java 虚拟机规范中的一个定义，一种规范。</p></blockquote><p>换句话说，方法区和永久代的关系就像是 Java 中接口和类的关系，类实现了接口。</p><p>在方法区中，还有一块非常重要的部分，也就是运行时常量池。在讲 <a href="https://mp.weixin.qq.com/s/uMEZ2Xwctx4n-_8zvtDp5A" target="_blank" rel="noopener noreferrer">class 文件<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>的时候，提到了每个 class 文件都会有个常量池，用来存放字符串常量、类和接口的名字、字段名、常量等等。运行时常量池和 class 文件的常量池是一一对应的，它就是通过 class 文件中的常量池来构建的。</p><p>JDK 7 之前，运行时常量池中包含着字符串常量池，都在方法区。</p><p>JDK 7 的时候，字符串常量池从方法区中拿出来放到了堆中，运行时常量池中的其他东西还在方法区中。</p><p>JDK 8 的时候，HotSpot 移除了永久代，也就是说方法区不存在了，取而代之的是元空间。也就意味着字符串常量池在堆中，运行时常量池跑到了元空间。</p><p>再来说说为什么要将永久代 (PermGen) 或者说方法区替换为元空间 (MetaSpace) 。</p><p>第一，永久代放在 Java 虚拟机中，就会受到 Java 虚拟机内存大小的限制，而元空间使用的是本地内存，也就脱离了 Java 虚拟机内存的限制。</p><p>第二，JDK 8 的时候，在 HotSpot 中融合了 JRockit 虚拟机，而 JRockit 中并没有永久代的概念，因此新的 HotSpot 就没有必要再开辟一块空间来作为永久代了。</p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png"></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/jvm/neicun-jiegou.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path 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content="PT5M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/oom.html#前言" class="router-link-active router-link-exact-active toc-link level2">前言</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/oom.html#表象" class="router-link-active router-link-exact-active toc-link level2">表象</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/oom.html#排查" class="router-link-active router-link-exact-active toc-link level2">排查</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/oom.html#定位" class="router-link-active router-link-exact-active toc-link level2">定位</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/oom.html#解决" class="router-link-active router-link-exact-active toc-link level2">解决</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/oom.html#总结" class="router-link-active router-link-exact-active toc-link level2">总结</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="一次内存溢出排查优化实战" tabindex="-1"><a class="header-anchor" href="#一次内存溢出排查优化实战" aria-hidden="true">#</a> 一次内存溢出排查优化实战</h1><h2 id="前言" tabindex="-1"><a class="header-anchor" href="#前言" aria-hidden="true">#</a> 前言</h2><p><code>OutOfMemoryError</code> 问题相信很多朋友都遇到过，相对于常见的业务异常（数组越界、空指针等）来说这类问题是很难定位和解决的。</p><p>本文以最近碰到的一次线上内存溢出的定位、解决问题的方式展开；希望能对碰到类似问题的同学带来思路和帮助。</p><p>主要从<code>表现--&gt;排查--&gt;定位--&gt;解决</code> 四个步骤来分析和解决问题。</p><h2 id="表象" tabindex="-1"><a class="header-anchor" href="#表象" aria-hidden="true">#</a> 表象</h2><p>最近我们生产上的一个应用不断的爆出内存溢出，并且随着业务量的增长出现的频次越来越高。</p><p>该程序的业务逻辑非常简单，就是从 Kafka 中将数据消费下来然后批量的做持久化操作。</p><p>而现象则是随着 Kafka 的消息越多，出现的异常的频次就越快。由于当时还有其他工作所以只能让运维做重启，并且监控好堆内存以及 GC 情况。</p><blockquote><p>重启大法虽好，可是依然不能根本解决问题。</p></blockquote><h2 id="排查" tabindex="-1"><a class="header-anchor" href="#排查" aria-hidden="true">#</a> 排查</h2><p>于是我们想根据运维之前收集到的内存数据、GC 日志尝试判断哪里出现问题。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/oom-81051388-0c35-4de6-a3d9-4f546ef4bfec.jpg" alt=""></p><p>结果发现老年代的内存使用就算是发生 GC 也一直居高不下，而且随着时间推移也越来越高。</p><p>结合 jstat 的日志发现就算是发生了 FGC 老年代也已经回收不了，内存已经到顶。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/oom-e79d4da0-fbb1-4918-a8d8-e29d2d64323b.jpg" alt=""></p><p>甚至有几台应用 FGC 达到了上百次，时间也高的可怕。</p><p>这说明应用的内存使用肯定是有问题的，有许多赖皮对象始终回收不掉。</p><h2 id="定位" tabindex="-1"><a class="header-anchor" href="#定位" aria-hidden="true">#</a> 定位</h2><p>由于生产上的内存 dump 文件非常大，达到了几十G。也是由于我们的内存设置太大有关。</p><p>所以导致想使用 MAT 分析需要花费大量时间。</p><p>因此我们便想是否可以在本地复现，这样就要好定位的多。</p><p>为了尽快的复现问题，我将本地应用最大堆内存设置为 150M。</p><p>然后在消费 Kafka 那里 Mock 为一个 while 循环一直不断的生成数据。</p><p>同时当应用启动之后利用 VisualVM 连上应用实时监控内存、GC 的使用情况。</p><p>结果跑了 10 几分钟内存使用并没有什么问题。根据图中可以看出，每产生一次 GC 内存都能有效的回收，所以这样并没有复现问题。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/oom-4cf05af0-924f-406b-a8a4-5aa885e38cea.jpg" alt=""></p><p>没法复现问题就很难定位了。于是我们 review 代码，发现生产的逻辑和我们用 while 循环 Mock 数据还不太一样。</p><p>查看生产的日志发现每次从 Kafka 中取出的都是几百条数据，而我们 Mock 时每次只能产生<strong>一条</strong>。</p><p>为了尽可能的模拟生产情况便在服务器上跑着一个生产者程序，一直源源不断的向 Kafka 中发送数据。</p><p>果然不出意外只跑了一分多钟内存就顶不住了，观察左图发现 GC 的频次非常高，但是内存的回收却是相形见拙。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/oom-a6d6c9cd-e79c-4a76-ba97-032cfefefd5f.jpg" alt=""></p><p>同时后台也开始打印内存溢出了，这样便复现出问题。</p><h2 id="解决" tabindex="-1"><a class="header-anchor" href="#解决" aria-hidden="true">#</a> 解决</h2><p>从目前的表现来看就是内存中有许多对象一直存在强引用关系导致得不到回收。</p><p>于是便想看看到底是什么对象占用了这么多的内存，利用 VisualVM 的 HeapDump 功能可以立即 dump 出当前应用的内存情况。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/oom-49b47ca3-b3e2-49f7-85c9-23f7a3ef6f93.jpg" alt=""></p><p>结果发现 <code>com.lmax.disruptor.RingBuffer</code> 类型的对象占用了将近 50% 的内存。</p><p>看到这个包自然就想到了 <code>Disruptor</code> 环形队列。</p><p>再次 review 代码发现：从 Kafka 里取出的 700 条数据是直接往 Disruptor 里丢的。</p><p>这里也就能说明为什么第一次模拟数据没复现问题了。</p><p>模拟的时候是一个对象放进队列里，而生产的情况是 700 条数据放进队列里。这个数据量是 700 倍的差距。</p><p>而 Disruptor 作为一个环形队列，再对象没有被覆盖之前是一直存在的。</p><p>我也做了一个实验，证明确实如此。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/oom-dee49da6-905a-4085-b82e-41e136d422e8.jpg" alt=""></p><p>我设置队列大小为 8 ，从 0~9 往里面写 10 条数据，当写到 8 的时候就会把之前 0 的位置覆盖掉，后面的以此类推（类似于 HashMap 的取模定位）。</p><p>所以在生产上假设我们的队列大小是 1024，那么随着系统的运行最终肯定会导致 1024 个位置上装满了对象，而且每个位置是 700 个！</p><p>于是查看了生产上 Disruptor 的 RingBuffer 配置，结果是：<code>1024*1024</code>。</p><p>这个数量级就非常吓人了。</p><p>为了验证是否是这个问题，我在本地将该值换为 2 ，一个最小值试试。</p><p>同样的 128M 内存，也是通过 Kafka 一直源源不断的取出数据。通过监控如下：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/oom-5529781f-1f68-47a7-a3d2-04eba9e9d52e.jpg" alt=""></p><p>跑了 20 几分钟系统一切正常，每当一次 GC 都能回收大部分内存，最终呈现锯齿状。</p><p>这样问题就找到了，不过生产上这个值具体设置多少还得根据业务情况测试才能知道，但原有的 1024*1024 是绝对不能再使用了。</p><h2 id="总结" tabindex="-1"><a class="header-anchor" href="#总结" aria-hidden="true">#</a> 总结</h2><p>虽然到了最后也就改了一行代码(还没改，直接修改配置)，但这排查过程我觉得是有意义的。</p><p>也会让大部分觉得 JVM 这样的黑盒难以下手的同学有一个直观的感受。</p><p><code>同时也得感叹 Disruptor 东西虽好，也不能乱用哦！</code></p><p>相关演示代码查看：</p><p><a href="https://github.com/crossoverJie/JCSprout/tree/master/src/main/java/com/crossoverjie/disruptor" target="_blank" rel="noopener noreferrer">https://github.com/crossoverJie/JCSprout/tree/master/src/main/java/com/crossoverjie/disruptor<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span 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href="/jvm/oom.html#前言" class="router-link-active router-link-exact-active toc-link level2">前言</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/oom.html#表象" class="router-link-active router-link-exact-active toc-link level2">表象</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/oom.html#排查" class="router-link-active router-link-exact-active toc-link level2">排查</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/oom.html#定位" class="router-link-active router-link-exact-active toc-link level2">定位</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/oom.html#解决" class="router-link-active router-link-exact-active toc-link level2">解决</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/oom.html#总结" class="router-link-active router-link-exact-active toc-link level2">总结</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="一次内存溢出排查优化实战" tabindex="-1"><a class="header-anchor" href="#一次内存溢出排查优化实战" aria-hidden="true">#</a> 一次内存溢出排查优化实战</h1><h2 id="前言" tabindex="-1"><a class="header-anchor" href="#前言" aria-hidden="true">#</a> 前言</h2><p><code>OutOfMemoryError</code> 问题相信很多朋友都遇到过，相对于常见的业务异常（数组越界、空指针等）来说这类问题是很难定位和解决的。</p><p>本文以最近碰到的一次线上内存溢出的定位、解决问题的方式展开；希望能对碰到类似问题的同学带来思路和帮助。</p><p>主要从<code>表现--&gt;排查--&gt;定位--&gt;解决</code> 四个步骤来分析和解决问题。</p><h2 id="表象" tabindex="-1"><a class="header-anchor" href="#表象" aria-hidden="true">#</a> 表象</h2><p>最近我们生产上的一个应用不断的爆出内存溢出，并且随着业务量的增长出现的频次越来越高。</p><p>该程序的业务逻辑非常简单，就是从 Kafka 中将数据消费下来然后批量的做持久化操作。</p><p>而现象则是随着 Kafka 的消息越多，出现的异常的频次就越快。由于当时还有其他工作所以只能让运维做重启，并且监控好堆内存以及 GC 情况。</p><blockquote><p>重启大法虽好，可是依然不能根本解决问题。</p></blockquote><h2 id="排查" tabindex="-1"><a class="header-anchor" href="#排查" aria-hidden="true">#</a> 排查</h2><p>于是我们想根据运维之前收集到的内存数据、GC 日志尝试判断哪里出现问题。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/oom-81051388-0c35-4de6-a3d9-4f546ef4bfec.jpg" alt=""></p><p>结果发现老年代的内存使用就算是发生 GC 也一直居高不下，而且随着时间推移也越来越高。</p><p>结合 jstat 的日志发现就算是发生了 FGC 老年代也已经回收不了，内存已经到顶。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/oom-e79d4da0-fbb1-4918-a8d8-e29d2d64323b.jpg" alt=""></p><p>甚至有几台应用 FGC 达到了上百次，时间也高的可怕。</p><p>这说明应用的内存使用肯定是有问题的，有许多赖皮对象始终回收不掉。</p><h2 id="定位" tabindex="-1"><a class="header-anchor" href="#定位" aria-hidden="true">#</a> 定位</h2><p>由于生产上的内存 dump 文件非常大，达到了几十G。也是由于我们的内存设置太大有关。</p><p>所以导致想使用 MAT 分析需要花费大量时间。</p><p>因此我们便想是否可以在本地复现，这样就要好定位的多。</p><p>为了尽快的复现问题，我将本地应用最大堆内存设置为 150M。</p><p>然后在消费 Kafka 那里 Mock 为一个 while 循环一直不断的生成数据。</p><p>同时当应用启动之后利用 VisualVM 连上应用实时监控内存、GC 的使用情况。</p><p>结果跑了 10 几分钟内存使用并没有什么问题。根据图中可以看出，每产生一次 GC 内存都能有效的回收，所以这样并没有复现问题。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/oom-4cf05af0-924f-406b-a8a4-5aa885e38cea.jpg" alt=""></p><p>没法复现问题就很难定位了。于是我们 review 代码，发现生产的逻辑和我们用 while 循环 Mock 数据还不太一样。</p><p>查看生产的日志发现每次从 Kafka 中取出的都是几百条数据，而我们 Mock 时每次只能产生<strong>一条</strong>。</p><p>为了尽可能的模拟生产情况便在服务器上跑着一个生产者程序，一直源源不断的向 Kafka 中发送数据。</p><p>果然不出意外只跑了一分多钟内存就顶不住了，观察左图发现 GC 的频次非常高，但是内存的回收却是相形见拙。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/oom-a6d6c9cd-e79c-4a76-ba97-032cfefefd5f.jpg" alt=""></p><p>同时后台也开始打印内存溢出了，这样便复现出问题。</p><h2 id="解决" tabindex="-1"><a class="header-anchor" href="#解决" aria-hidden="true">#</a> 解决</h2><p>从目前的表现来看就是内存中有许多对象一直存在强引用关系导致得不到回收。</p><p>于是便想看看到底是什么对象占用了这么多的内存，利用 VisualVM 的 HeapDump 功能可以立即 dump 出当前应用的内存情况。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/oom-49b47ca3-b3e2-49f7-85c9-23f7a3ef6f93.jpg" alt=""></p><p>结果发现 <code>com.lmax.disruptor.RingBuffer</code> 类型的对象占用了将近 50% 的内存。</p><p>看到这个包自然就想到了 <code>Disruptor</code> 环形队列。</p><p>再次 review 代码发现：从 Kafka 里取出的 700 条数据是直接往 Disruptor 里丢的。</p><p>这里也就能说明为什么第一次模拟数据没复现问题了。</p><p>模拟的时候是一个对象放进队列里，而生产的情况是 700 条数据放进队列里。这个数据量是 700 倍的差距。</p><p>而 Disruptor 作为一个环形队列，再对象没有被覆盖之前是一直存在的。</p><p>我也做了一个实验，证明确实如此。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/oom-dee49da6-905a-4085-b82e-41e136d422e8.jpg" alt=""></p><p>我设置队列大小为 8 ，从 0~9 往里面写 10 条数据，当写到 8 的时候就会把之前 0 的位置覆盖掉，后面的以此类推（类似于 HashMap 的取模定位）。</p><p>所以在生产上假设我们的队列大小是 1024，那么随着系统的运行最终肯定会导致 1024 个位置上装满了对象，而且每个位置是 700 个！</p><p>于是查看了生产上 Disruptor 的 RingBuffer 配置，结果是：<code>1024*1024</code>。</p><p>这个数量级就非常吓人了。</p><p>为了验证是否是这个问题，我在本地将该值换为 2 ，一个最小值试试。</p><p>同样的 128M 内存，也是通过 Kafka 一直源源不断的取出数据。通过监控如下：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/oom-5529781f-1f68-47a7-a3d2-04eba9e9d52e.jpg" alt=""></p><p>跑了 20 几分钟系统一切正常，每当一次 GC 都能回收大部分内存，最终呈现锯齿状。</p><p>这样问题就找到了，不过生产上这个值具体设置多少还得根据业务情况测试才能知道，但原有的 1024*1024 是绝对不能再使用了。</p><h2 id="总结" tabindex="-1"><a class="header-anchor" href="#总结" aria-hidden="true">#</a> 总结</h2><p>虽然到了最后也就改了一行代码(还没改，直接修改配置)，但这排查过程我觉得是有意义的。</p><p>也会让大部分觉得 JVM 这样的黑盒难以下手的同学有一个直观的感受。</p><p><code>同时也得感叹 Disruptor 东西虽好，也不能乱用哦！</code></p><p>相关演示代码查看：</p><p><a href="https://github.com/crossoverJie/JCSprout/tree/master/src/main/java/com/crossoverjie/disruptor" target="_blank" rel="noopener noreferrer">https://github.com/crossoverJie/JCSprout/tree/master/src/main/java/com/crossoverjie/disruptor<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><p><strong>你的点赞与转发是最大的支持。</strong></p><p>原文链接：https://crossoverjie.top/2018/08/29/java-senior/OOM-Disruptor/</p><p><img 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class="title">2.4 字符串&amp;数组</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.5 集合框架（容器）</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.6 IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.11 并发编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">2.12 JVM</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/jvm/what-is-jvm.html" class="nav-link sidebar-link sidebar-page" aria-label="JVM到底是什么？"><!---->JVM到底是什么？<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/how-run-java-code.html" class="nav-link sidebar-link sidebar-page" aria-label="JVM到底是如何运行Java代码的"><!---->JVM到底是如何运行Java代码的<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/class-load.html" class="nav-link sidebar-link sidebar-page" aria-label="类加载机制"><!---->类加载机制<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/class-file-jiegou.html" class="nav-link sidebar-link sidebar-page" aria-label="详解Java的类文件结构"><!---->详解Java的类文件结构<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/bytecode.html" class="nav-link sidebar-link sidebar-page" aria-label="从javap的角度轻松看懂字节码"><!---->从javap的角度轻松看懂字节码<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/zijiema-zhiling.html" class="nav-link sidebar-link sidebar-page" aria-label="字节码指令详解"><!---->字节码指令详解<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/how-jvm-run-zijiema-zhiling.html" class="nav-link sidebar-link sidebar-page" aria-label="虚拟机是如何执行字节码指令的"><!---->虚拟机是如何执行字节码指令的<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/hsdb.html" class="nav-link sidebar-link sidebar-page" aria-label="HSDB（Hotspot Debugger）"><!---->HSDB（Hotspot Debugger）<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/asm.html" class="nav-link sidebar-link sidebar-page" aria-label="史上最通俗易懂的ASM教程"><!---->史上最通俗易懂的ASM教程<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/compile-jdk.html" class="nav-link sidebar-link sidebar-page" aria-label="自己编译JDK"><!---->自己编译JDK<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/neicun-jiegou.html" class="nav-link sidebar-link sidebar-page" aria-label="深入理解JVM的内存结构"><!---->深入理解JVM的内存结构<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/whereis-the-object.html" class="nav-link sidebar-link sidebar-page" aria-label="Java 创建的对象到底放在哪"><!---->Java 创建的对象到底放在哪<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/gc.html" class="nav-link sidebar-link sidebar-page" aria-label="从头到尾说一次Java垃圾回收"><!---->从头到尾说一次Java垃圾回收<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/tujie-gc.html" class="nav-link sidebar-link sidebar-page" aria-label="图解Java的垃圾回收机制"><!---->图解Java的垃圾回收机制<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/jvm/problem-tools.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="Java问题诊断和排查工具"><!---->Java问题诊断和排查工具<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/problem-tools.html#jdk自带的工具" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="JDK自带的工具"><!---->JDK自带的工具<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/problem-tools.html#常用命令" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="常用命令："><!---->常用命令：<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/problem-tools.html#java-dump" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="JAVA Dump："><!---->JAVA Dump：<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/problem-tools.html#_1、jps" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="1、jps"><!---->1、jps<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/problem-tools.html#_2、jstack" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="2、jstack"><!---->2、jstack<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/problem-tools.html#_4、jstat" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="4、jstat"><!---->4、jstat<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/problem-tools.html#_5、jhat" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="5、jhat"><!---->5、jhat<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/problem-tools.html#_6、jinfo" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="6、jinfo"><!---->6、jinfo<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/problem-tools.html#_7、jcmd" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="7、jcmd"><!---->7、jcmd<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/problem-tools.html#_8、可视化监控工具-jconsole、jvisualvm" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="8、可视化监控工具（JConsole、JVisualVM）"><!---->8、可视化监控工具（JConsole、JVisualVM）<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/problem-tools.html#简介" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="简介"><!---->简介<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/problem-tools.html#jconsole" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="JConsole"><!---->JConsole<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/problem-tools.html#visualvm" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="VisualVM"><!---->VisualVM<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/problem-tools.html#连接远程进程" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="连接远程进程"><!---->连接远程进程<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/problem-tools.html#其他工具" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="其他工具"><!---->其他工具<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/problem-tools.html#上问题排查思路-八股" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="上问题排查思路（八股）"><!---->上问题排查思路（八股）<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/jvm/jit.html" class="nav-link sidebar-link sidebar-page" aria-label="JIT原理解析及实践"><!---->JIT原理解析及实践<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/oom.html" class="nav-link sidebar-link sidebar-page" aria-label="内存溢出排查优化实战"><!---->内存溢出排查优化实战<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/cpu-percent-100.html" class="nav-link sidebar-link sidebar-page" aria-label="CPU 100% 排查优化实践"><!---->CPU 100% 排查优化实践<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/zongjie.html" class="nav-link sidebar-link sidebar-page" aria-label="JVM 核心知识点总结"><!---->JVM 核心知识点总结<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java问题诊断和排查工具（查看JVM参数、内存使用情况及分析）</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月27日</span><meta property="datePublished" content="2022-03-27T04:07:13.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><li class="category category1" role>JVM</li><meta property="articleSection" content="Java核心,JVM"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 16 分钟</span><meta property="timeRequired" content="PT16M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/problem-tools.html#jdk自带的工具" class="router-link-active router-link-exact-active toc-link level2">JDK自带的工具</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/problem-tools.html#常用命令" class="router-link-active router-link-exact-active toc-link level3">常用命令：</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/problem-tools.html#java-dump" class="router-link-active router-link-exact-active toc-link level3">JAVA Dump：</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/problem-tools.html#_1、jps" class="router-link-active router-link-exact-active toc-link level2">1、jps</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/problem-tools.html#_2、jstack" class="router-link-active router-link-exact-active toc-link level2">2、jstack</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/problem-tools.html#_4、jstat" class="router-link-active router-link-exact-active toc-link level2">4、jstat</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/problem-tools.html#_5、jhat" class="router-link-active router-link-exact-active toc-link level2">5、jhat</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/problem-tools.html#_6、jinfo" class="router-link-active router-link-exact-active toc-link level2">6、jinfo</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/problem-tools.html#_7、jcmd" class="router-link-active router-link-exact-active toc-link level2">7、jcmd</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/problem-tools.html#_8、可视化监控工具-jconsole、jvisualvm" class="router-link-active router-link-exact-active toc-link level2">8、可视化监控工具（JConsole、JVisualVM）</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/problem-tools.html#简介" class="router-link-active router-link-exact-active toc-link level3">简介</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/problem-tools.html#jconsole" class="router-link-active router-link-exact-active toc-link level3">JConsole</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/problem-tools.html#visualvm" class="router-link-active router-link-exact-active toc-link level3">VisualVM</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/problem-tools.html#连接远程进程" class="router-link-active router-link-exact-active toc-link level3">连接远程进程</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/problem-tools.html#其他工具" class="router-link-active router-link-exact-active toc-link level2">其他工具</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/problem-tools.html#上问题排查思路-八股" class="router-link-active router-link-exact-active toc-link level2">上问题排查思路（八股）</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="java问题诊断和排查工具-查看jvm参数、内存使用情况及分析" tabindex="-1"><a class="header-anchor" href="#java问题诊断和排查工具-查看jvm参数、内存使用情况及分析" aria-hidden="true">#</a> Java问题诊断和排查工具（查看JVM参数、内存使用情况及分析）</h1><h2 id="jdk自带的工具" tabindex="-1"><a class="header-anchor" href="#jdk自带的工具" aria-hidden="true">#</a> JDK自带的工具</h2><p>在JDK的bin目录下有很多命令行工具：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-547b1b2c-9fb4-4d1d-9c72-013ec210f6a5.jpg" alt=""></p><p>我们可以看到各个工具的大小基本上都稳定在27kb左右，这个不是JDK开发团队刻意为之的，而是因为这些工具大多数是 <code>jdk\lib\tools.jar</code> 类库的一层薄包装而已，他们的主要功能代码是在tools类库中实现的。</p><p>命令行工具的好处是：当应用程序部署到生产环境后，无论是直接接触物理服务器还是远程telnet到服务器上都会受到限制。而借助tools.jar类库里面的接口，我们可以直接在应用程序中实现功能强大的监控分析功能。</p><h3 id="常用命令" tabindex="-1"><a class="header-anchor" href="#常用命令" aria-hidden="true">#</a> 常用命令：</h3><p>这里主要介绍如下几个工具：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-01.png" alt=""></p><p>1、jps：查看本机java进程信息</p><p>2、jstack：打印线程的<strong>栈</strong>信息，制作 线程dump文件</p><p>3、jmap：打印内存映射信息，制作 堆dump文件</p><p>4、jstat：性能监控工具</p><p>5、jhat：内存分析工具，用于解析堆dump文件并以适合人阅读的方式展示出来</p><p>6、jconsole：简易的JVM可视化工具</p><p>7、jvisualvm：功能更强大的JVM可视化工具</p><p>8、javap：查看字节码</p><h3 id="java-dump" tabindex="-1"><a class="header-anchor" href="#java-dump" aria-hidden="true">#</a> JAVA Dump：</h3><p>JAVA Dump就是虚拟机运行时的快照，将虚拟机运行时的状态和信息保存到文件中，包括：</p><p>线程dump：包含所有线程的运行状态，纯文本格式</p><p>堆dump：包含所有堆对象的状态，二进制格式</p><h2 id="_1、jps" tabindex="-1"><a class="header-anchor" href="#_1、jps" aria-hidden="true">#</a> 1、jps</h2><p>显示当前所有java进程pid的命令，我们可以通过这个命令来查看到底启动了几个java进程（因为每一个java程序都会独占一个java虚拟机实例），不过jps有个缺点是只能显示当前用户的进程id，要显示其他用户的还只能用linux的ps命令。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-2017daf6-832a-4673-b776-ad3380e47402.png" alt=""></p><p>执行jps命令，会列出所有正在运行的java进程，其中jps命令也是一个java程序。前面的数字就是进程的id，这个id的作用非常大，后面会有相关介绍。</p><p><strong>jps -help：</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-031be661-e47e-44f0-9e33-34368b187662.png" alt=""></p><p><strong>jps -l</strong> 输出应用程序main.class的完整package名或者应用程序jar文件完整路径名</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-0ccc96dc-8053-4222-9824-b116f02776a4.png" alt=""></p><p><strong>jps -v</strong> 输出传递给JVM的参数</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-059a3285-4a01-4f7a-a6ed-1cc5dcbf3f18.png" alt=""></p><p><strong>jps失效</strong></p><p>我们在定位问题过程会遇到这样一种情况，用jps查看不到进程id，用ps -ef | grep java却能看到启动的java进程。</p><p>要解释这种现象，先来了解下jps的实现机制：</p><p>java程序启动后，会在目录/tmp/hsperfdata_{userName}/下生成几个文件，文件名就是java进程的pid，因此jps列出进程id就是把这个目录下的文件名列一下而已，至于系统参数，则是读取文件中的内容。</p><p>我们来思考下：<strong>如果由于磁盘满了，无法创建这些文件，或者用户对这些文件没有读的权限。又或者因为某种原因这些文件或者目录被清除，出现以上这些情况，就会导致jps命令失效。</strong></p><p>如果jps命令失效，而我们又要获取pid，还可以使用以下两种方法：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>1、top | grep java
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class="sidebar-heading clickable"><!----><span class="title">2.6 IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.11 并发编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">2.12 JVM</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/jvm/what-is-jvm.html" class="nav-link sidebar-link sidebar-page" aria-label="JVM到底是什么？"><!---->JVM到底是什么？<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/how-run-java-code.html" class="nav-link sidebar-link sidebar-page" aria-label="JVM到底是如何运行Java代码的"><!---->JVM到底是如何运行Java代码的<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/class-load.html" class="nav-link sidebar-link sidebar-page" aria-label="类加载机制"><!---->类加载机制<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/class-file-jiegou.html" class="nav-link sidebar-link sidebar-page" aria-label="详解Java的类文件结构"><!---->详解Java的类文件结构<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/bytecode.html" class="nav-link sidebar-link sidebar-page" aria-label="从javap的角度轻松看懂字节码"><!---->从javap的角度轻松看懂字节码<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/zijiema-zhiling.html" class="nav-link sidebar-link sidebar-page" aria-label="字节码指令详解"><!---->字节码指令详解<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/how-jvm-run-zijiema-zhiling.html" class="nav-link sidebar-link sidebar-page" aria-label="虚拟机是如何执行字节码指令的"><!---->虚拟机是如何执行字节码指令的<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/hsdb.html" class="nav-link sidebar-link sidebar-page" aria-label="HSDB（Hotspot Debugger）"><!---->HSDB（Hotspot Debugger）<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/asm.html" class="nav-link sidebar-link sidebar-page" aria-label="史上最通俗易懂的ASM教程"><!---->史上最通俗易懂的ASM教程<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/compile-jdk.html" class="nav-link sidebar-link sidebar-page" aria-label="自己编译JDK"><!---->自己编译JDK<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/neicun-jiegou.html" class="nav-link sidebar-link sidebar-page" aria-label="深入理解JVM的内存结构"><!---->深入理解JVM的内存结构<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/whereis-the-object.html" class="nav-link sidebar-link sidebar-page" aria-label="Java 创建的对象到底放在哪"><!---->Java 创建的对象到底放在哪<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/gc.html" class="nav-link sidebar-link sidebar-page" aria-label="从头到尾说一次Java垃圾回收"><!---->从头到尾说一次Java垃圾回收<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/tujie-gc.html" class="nav-link sidebar-link sidebar-page" aria-label="图解Java的垃圾回收机制"><!---->图解Java的垃圾回收机制<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/jvm/problem-tools.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="Java问题诊断和排查工具"><!---->Java问题诊断和排查工具<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/problem-tools.html#jdk自带的工具" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="JDK自带的工具"><!---->JDK自带的工具<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/problem-tools.html#常用命令" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="常用命令："><!---->常用命令：<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/problem-tools.html#java-dump" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="JAVA Dump："><!---->JAVA Dump：<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/problem-tools.html#_1、jps" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="1、jps"><!---->1、jps<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/problem-tools.html#_2、jstack" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="2、jstack"><!---->2、jstack<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/problem-tools.html#_4、jstat" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="4、jstat"><!---->4、jstat<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/problem-tools.html#_5、jhat" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="5、jhat"><!---->5、jhat<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/problem-tools.html#_6、jinfo" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="6、jinfo"><!---->6、jinfo<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/problem-tools.html#_7、jcmd" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="7、jcmd"><!---->7、jcmd<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/problem-tools.html#_8、可视化监控工具-jconsole、jvisualvm" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="8、可视化监控工具（JConsole、JVisualVM）"><!---->8、可视化监控工具（JConsole、JVisualVM）<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/problem-tools.html#简介" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="简介"><!---->简介<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/problem-tools.html#jconsole" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="JConsole"><!---->JConsole<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/problem-tools.html#visualvm" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="VisualVM"><!---->VisualVM<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/problem-tools.html#连接远程进程" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="连接远程进程"><!---->连接远程进程<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/problem-tools.html#其他工具" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="其他工具"><!---->其他工具<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/problem-tools.html#上问题排查思路-八股" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="上问题排查思路（八股）"><!---->上问题排查思路（八股）<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/jvm/jit.html" class="nav-link sidebar-link sidebar-page" aria-label="JIT原理解析及实践"><!---->JIT原理解析及实践<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/oom.html" class="nav-link sidebar-link sidebar-page" aria-label="内存溢出排查优化实战"><!---->内存溢出排查优化实战<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/cpu-percent-100.html" class="nav-link sidebar-link sidebar-page" aria-label="CPU 100% 排查优化实践"><!---->CPU 100% 排查优化实践<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/zongjie.html" class="nav-link sidebar-link sidebar-page" aria-label="JVM 核心知识点总结"><!---->JVM 核心知识点总结<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java问题诊断和排查工具（查看JVM参数、内存使用情况及分析）</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月27日</span><meta property="datePublished" content="2022-03-27T04:07:13.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><li class="category category1" role>JVM</li><meta property="articleSection" content="Java核心,JVM"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 16 分钟</span><meta property="timeRequired" content="PT16M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/problem-tools.html#jdk自带的工具" class="router-link-active router-link-exact-active toc-link level2">JDK自带的工具</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/problem-tools.html#常用命令" class="router-link-active router-link-exact-active toc-link level3">常用命令：</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/problem-tools.html#java-dump" class="router-link-active router-link-exact-active toc-link level3">JAVA Dump：</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/problem-tools.html#_1、jps" class="router-link-active router-link-exact-active toc-link level2">1、jps</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/problem-tools.html#_2、jstack" class="router-link-active router-link-exact-active toc-link level2">2、jstack</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/problem-tools.html#_4、jstat" class="router-link-active router-link-exact-active toc-link level2">4、jstat</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/problem-tools.html#_5、jhat" class="router-link-active router-link-exact-active toc-link level2">5、jhat</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/problem-tools.html#_6、jinfo" class="router-link-active router-link-exact-active toc-link level2">6、jinfo</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/problem-tools.html#_7、jcmd" class="router-link-active router-link-exact-active toc-link level2">7、jcmd</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/problem-tools.html#_8、可视化监控工具-jconsole、jvisualvm" class="router-link-active router-link-exact-active toc-link level2">8、可视化监控工具（JConsole、JVisualVM）</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/problem-tools.html#简介" class="router-link-active router-link-exact-active toc-link level3">简介</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/problem-tools.html#jconsole" class="router-link-active router-link-exact-active toc-link level3">JConsole</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/problem-tools.html#visualvm" class="router-link-active router-link-exact-active toc-link level3">VisualVM</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/problem-tools.html#连接远程进程" class="router-link-active router-link-exact-active toc-link level3">连接远程进程</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/problem-tools.html#其他工具" class="router-link-active router-link-exact-active toc-link level2">其他工具</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/problem-tools.html#上问题排查思路-八股" class="router-link-active router-link-exact-active toc-link level2">上问题排查思路（八股）</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="java问题诊断和排查工具-查看jvm参数、内存使用情况及分析" tabindex="-1"><a class="header-anchor" href="#java问题诊断和排查工具-查看jvm参数、内存使用情况及分析" aria-hidden="true">#</a> Java问题诊断和排查工具（查看JVM参数、内存使用情况及分析）</h1><h2 id="jdk自带的工具" tabindex="-1"><a class="header-anchor" href="#jdk自带的工具" aria-hidden="true">#</a> JDK自带的工具</h2><p>在JDK的bin目录下有很多命令行工具：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-547b1b2c-9fb4-4d1d-9c72-013ec210f6a5.jpg" alt=""></p><p>我们可以看到各个工具的大小基本上都稳定在27kb左右，这个不是JDK开发团队刻意为之的，而是因为这些工具大多数是 <code>jdk\lib\tools.jar</code> 类库的一层薄包装而已，他们的主要功能代码是在tools类库中实现的。</p><p>命令行工具的好处是：当应用程序部署到生产环境后，无论是直接接触物理服务器还是远程telnet到服务器上都会受到限制。而借助tools.jar类库里面的接口，我们可以直接在应用程序中实现功能强大的监控分析功能。</p><h3 id="常用命令" tabindex="-1"><a class="header-anchor" href="#常用命令" aria-hidden="true">#</a> 常用命令：</h3><p>这里主要介绍如下几个工具：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-01.png" alt=""></p><p>1、jps：查看本机java进程信息</p><p>2、jstack：打印线程的<strong>栈</strong>信息，制作 线程dump文件</p><p>3、jmap：打印内存映射信息，制作 堆dump文件</p><p>4、jstat：性能监控工具</p><p>5、jhat：内存分析工具，用于解析堆dump文件并以适合人阅读的方式展示出来</p><p>6、jconsole：简易的JVM可视化工具</p><p>7、jvisualvm：功能更强大的JVM可视化工具</p><p>8、javap：查看字节码</p><h3 id="java-dump" tabindex="-1"><a class="header-anchor" href="#java-dump" aria-hidden="true">#</a> JAVA Dump：</h3><p>JAVA Dump就是虚拟机运行时的快照，将虚拟机运行时的状态和信息保存到文件中，包括：</p><p>线程dump：包含所有线程的运行状态，纯文本格式</p><p>堆dump：包含所有堆对象的状态，二进制格式</p><h2 id="_1、jps" tabindex="-1"><a class="header-anchor" href="#_1、jps" aria-hidden="true">#</a> 1、jps</h2><p>显示当前所有java进程pid的命令，我们可以通过这个命令来查看到底启动了几个java进程（因为每一个java程序都会独占一个java虚拟机实例），不过jps有个缺点是只能显示当前用户的进程id，要显示其他用户的还只能用linux的ps命令。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-2017daf6-832a-4673-b776-ad3380e47402.png" alt=""></p><p>执行jps命令，会列出所有正在运行的java进程，其中jps命令也是一个java程序。前面的数字就是进程的id，这个id的作用非常大，后面会有相关介绍。</p><p><strong>jps -help：</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-031be661-e47e-44f0-9e33-34368b187662.png" alt=""></p><p><strong>jps -l</strong> 输出应用程序main.class的完整package名或者应用程序jar文件完整路径名</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-0ccc96dc-8053-4222-9824-b116f02776a4.png" alt=""></p><p><strong>jps -v</strong> 输出传递给JVM的参数</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-059a3285-4a01-4f7a-a6ed-1cc5dcbf3f18.png" alt=""></p><p><strong>jps失效</strong></p><p>我们在定位问题过程会遇到这样一种情况，用jps查看不到进程id，用ps -ef | grep java却能看到启动的java进程。</p><p>要解释这种现象，先来了解下jps的实现机制：</p><p>java程序启动后，会在目录/tmp/hsperfdata_{userName}/下生成几个文件，文件名就是java进程的pid，因此jps列出进程id就是把这个目录下的文件名列一下而已，至于系统参数，则是读取文件中的内容。</p><p>我们来思考下：<strong>如果由于磁盘满了，无法创建这些文件，或者用户对这些文件没有读的权限。又或者因为某种原因这些文件或者目录被清除，出现以上这些情况，就会导致jps命令失效。</strong></p><p>如果jps命令失效，而我们又要获取pid，还可以使用以下两种方法：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>1、top | grep java
 2、ps -ef |grep java
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><h2 id="_2、jstack" tabindex="-1"><a class="header-anchor" href="#_2、jstack" aria-hidden="true">#</a> 2、jstack</h2><p>主要用于生成指定进程当前时刻的线程快照，线程快照是当前java虚拟机每一条线程正在执行的方法堆栈的集合，生成线程快照的主要目的是用于定位线程出现长时间停顿的原因，如线程间死锁、死循环、请求外部资源导致长时间等待。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-e80d0925-2dcf-4204-b46d-47312df2a673.png" alt=""></p><p><strong>3、jmap</strong></p><p>主要用于打印指定java进程的共享对象内存映射或堆内存细节。</p><p><strong>堆Dump是反映堆使用情况的内存镜像，其中主要包括系统信息、虚拟机属性、完整的线程Dump、所有类和对象的状态等。一般在内存不足，GC异常等情况下，我们会去怀疑内存泄漏，这个时候就会去打印堆Dump。</strong></p><p>jmap的用法摘要：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-96a70bab-5cee-4068-8ccb-1d35124abeea.png" alt=""></p><p><strong>1、<code>jmap pid</code></strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-38d5c9da-e433-43d2-b1bc-3f3634e05497.png" alt=""></p><p>打印的信息分别为：共享对象的起始地址、映射大小、共享对象路径的全程。</p><p><strong>2、<code>jmap -heap pid</code>:查看堆使用情况</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-75acf4c8-393d-43d1-b208-04de1f0ba6bd.png" alt=""></p><p><strong>3、<code>jmap -histo pid</code>：查看堆中对象数量和大小</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-5e42fe47-e1e6-4649-acb5-e17bd277a771.png" alt=""></p><p>打印的信息分别是：序列号、对象的数量、这些对象的内存占用大小、这些对象所属的类的全限定名</p><p>如果是内部类，类名的开头会加上*，如果加上live子参数的话，如jmap -histo：live pid，这个命名会触发一次FUll GC，只统计存活对象</p><p><strong>4、<code>jmap -dump:format=b,file=heapdump pid</code>：将内存使用的详细情况输出到文件</strong></p><p>然后使用jhat命令查看该文件：jhat -port 4000 文件名 ，在浏览器中访问http:localhost:4000/</p><p>总结：</p><p>该命令适用的场景是程序内存不足或者GC频繁，这时候很可能是内存泄漏。通过用以上命令查看堆使用情况、大量对象被持续引用等情况。</p><h2 id="_4、jstat" tabindex="-1"><a class="header-anchor" href="#_4、jstat" aria-hidden="true">#</a> <strong>4、jstat</strong></h2><p>主要是对java应用程序的资源和性能进行实时的命令行监控，包括了对heap size和垃圾回收状况的监控。</p><p><code>jstat -&lt;option&gt; [-t] [-h&lt;lines&gt;] &lt;vmid&gt; [&lt;interval&gt; [&lt;count&gt;]]</code></p><p>option：我们经常使用的选项有gc、gcutil</p><p>vmid：java进程id</p><p>interval：间隔时间，单位为毫秒</p><p>count：打印次数</p><p><strong>1、jstat -gc PID 5000 20</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-3f71397d-3ff6-430d-adf4-ff5ab9f111d5.png" alt=""></p><p>S0C:年轻代第一个survivor的容量（字节）</p><p>S1C：年轻代第二个survivor的容量（字节）</p><p>S0U：年轻代第一个survivor已使用的容量（字节）</p><p>S1U：年轻代第二个survivor已使用的容量（字节）</p><p>EC：年轻代中Eden的空间（字节）</p><p>EU：年代代中Eden已使用的空间（字节）</p><p>OC：老年代的容量（字节）</p><p>OU:老年代中已使用的空间（字节）</p><p>PC：永久代的容量</p><p>PU：永久代已使用的容量</p><p>YGC：从应用程序启动到采样时年轻代中GC的次数</p><p>YGCT:从应用程序启动到采样时年轻代中GC所使用的时间（单位：S）</p><p>FGC：从应用程序启动到采样时老年代中GC（FULL GC）的次数</p><p>FGCT：从应用程序启动到采样时老年代中GC所使用的时间（单位：S）</p><p><strong>2、jstat -gcutil PID 5000 20</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-c2a84c1d-e853-482a-88a5-27ef39da66a0.png" alt=""></p><p>s0:年轻代中第一个survivor已使用的占当前容量百分比</p><p>s1:年轻代中第二个survivor已使用的占当前容量百分比</p><p>E:年轻代中Eden已使用的占当前容量百分比</p><p>O:老年代中已使用的占当前容量百分比</p><p>P:永久代中已使用的占当前容量百分比</p><h2 id="_5、jhat" tabindex="-1"><a class="header-anchor" href="#_5、jhat" aria-hidden="true">#</a> 5、jhat</h2><p>主要用来解析java堆dump并启动一个web服务器，然后就可以在浏览器中查看堆的dump文件了。</p><p>生成dump文件的方法前面已经介绍了，这边主要介绍如何解析java堆转储文件，并启动一个web server</p><p><strong>jhat heapdump</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-fd76ac30-53a5-4549-8206-18283f330758.png" alt=""></p><p>这个命令将heapdump文件转换成html格式，并且启动一个http服务，默认端口为7000。</p><p>如果端口冲突，可以使用以下命令指定端口：<strong>jhat -port 4000 heapdump</strong></p><p>下面我们来访问下：ip：port</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-059e61f1-8263-4ee0-b36b-f117ecaf0a07.png" alt=""></p><h2 id="_6、jinfo" tabindex="-1"><a class="header-anchor" href="#_6、jinfo" aria-hidden="true">#</a> 6、jinfo</h2><p>jinfo可以用来查看正在运行的java运用程序的扩展参数，甚至支持在运行时动态地更改部分参数。</p><p>基本使用语法如下： <code>jinfo -&lt; option &gt; &lt; pid &gt; </code>，其中option可以为以下信息：</p><p><code>-flag&lt; name &gt;</code>: 打印指定java虚拟机的参数值</p><p><code>-flag [+|-]&lt; name &gt;</code>：设置或取消指定java虚拟机参数的布尔值</p><p><code>-flag &lt; name &gt;=&lt; value &gt;</code>：设置指定java虚拟机的参数的值</p><p>使用示例</p><p>下面的命令显示了新生代对象晋升到老年代对象的最大年龄。在运行程序运行时并没有指定这个参数，但是通过jinfo，可以查看这个参数的当前的值。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-f37517b7-20b4-4243-ae03-d41126ae43e5.png" alt=""></p><p>下面的命令显示是否打印gc详细信息：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-86c5ace2-7377-4d5a-a780-0a194e14c9a0.png" alt=""></p><p>下面的命令在运用程序运行时动态打开打印详细gc信息开关：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-d258d260-65eb-48f9-8585-6bed74de5a47.png" alt=""></p><p>注意事项：jinfo虽然可以在java程序运行时动态地修改虚拟机参数，但并不是所有的参数都支持动态修改。</p><h2 id="_7、jcmd" tabindex="-1"><a class="header-anchor" href="#_7、jcmd" aria-hidden="true">#</a> 7、jcmd</h2><p>在JDK 1.7之后，新增了一个命令行工具jcmd。它是一个多功能工具，可以用来导出堆，查看java进程，导出线程信息，执行GC等。jcmd拥有jmap的大部分功能，Oracle官方建议使用jcmd代替jmap。</p><p>使用 jcmd -l 命令列出当前运行的所有虚拟机，示例： <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-4fa6915b-d39c-4d6d-a6e7-edc989cac76f.png" alt=""></p><p>针对每一个虚拟机，可以使用help命令列出该虚拟机支持的所有命令，示例：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-219b7cac-c9a9-4d47-8ecf-93a4a04fc1db.png" alt=""></p><p>子命令含义：</p><ul><li>VM.native_memory</li><li>VM.commercial_features</li><li>GC.rotate_log</li><li>ManagementAgent.stop</li><li>ManagementAgent.start_local</li><li>ManagementAgent.start</li><li>Thread.print，                         打印线程栈信息</li><li>GC.class_histogram，              查看系统中类统计信息</li><li>GC.heap_dump，                    导出堆信息，与jmap -dump功能一样</li><li>GC.run_finalization，               触发finalize()</li><li>GC.run，                                触发gc()</li><li>VM.uptime，                           VM启动时间</li><li>VM.flags，                              获取JVM启动参数</li><li>VM.system_properties，          获取系统Properties</li><li>VM.command_line，                 启动时命令行指定的参数</li><li>VM.version</li><li>help</li></ul><p>示例：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-b0742677-4ad0-4fd3-b985-054238af8865.png" alt=""></p><h2 id="_8、可视化监控工具-jconsole、jvisualvm" tabindex="-1"><a class="header-anchor" href="#_8、可视化监控工具-jconsole、jvisualvm" aria-hidden="true">#</a> 8、可视化监控工具（JConsole、JVisualVM）</h2><h3 id="简介" tabindex="-1"><a class="header-anchor" href="#简介" aria-hidden="true">#</a> 简介</h3><p>在 JDK 安装目录的 <code>bin</code> 文件夹下，除了提供有命令行监控工具外，还提供了几种可视化的监控工具，以方便用户直观地了解虚拟机的运行状态。常用的可视化监控工具如下：</p><h3 id="jconsole" tabindex="-1"><a class="header-anchor" href="#jconsole" aria-hidden="true">#</a> JConsole</h3><h4 id="简介-1" tabindex="-1"><a class="header-anchor" href="#简介-1" aria-hidden="true">#</a> 简介</h4><p>JConsole（Java Monitoring and Management Console）是一款基于 JMX（Java Manage-ment Extensions）的可视化监视工具。它的主要功能是通过 JMX 的 MBean（Managed Bean）对系统信息进行收集和动态调整系统参数。JMX（Java Management Extensions）是一个为应用程序、设备、系统等植入管理功能的框架，通常用于监控系统的运行状态或管理系统的部分功能。</p><h4 id="使用" tabindex="-1"><a class="header-anchor" href="#使用" aria-hidden="true">#</a> 使用</h4><p>打开位于 bin 目录下的 <code>jconsole</code> 程序后，它会自动扫描当前主机上的所有 JVM 进程：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-6b614bd9-5e75-48e0-b51e-50cbd33669a5.png" alt=""></p><p>选中需要监控的进程后，点击连接，即可进入监控界面。监控界面包含了 <em>概览</em>、<em>内存</em>、<em>线程</em>、<em>类</em>、<em>VM 概要</em>、<em>MBean</em> 六个选项卡。其中概览界面显示的是 <em>内存</em>、<em>线程</em>、<em>类</em> 等三个选项卡界面的概览信息，如下所示：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-10f3df05-e209-4bca-a8dc-99668a2d8e07.png" alt=""></p><p>而内存界面主要用于显示堆和非堆上各个区域的使用量：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-ddabe66e-18ac-4cb6-9e9e-f446645a4501.png" alt=""></p><p>线程界面内主要显示各个线程的堆栈信息，最下角有一个 <strong>检测死锁</strong> 按钮，点击后如果检测到死锁存在，则在下部的线程选项卡旁边会出现死锁选项卡：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-a97902be-6084-4009-81b2-cbe08d60a617.png" alt=""></p><p>点击死锁选项卡则可以看到造成死锁的线程：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-a76f6714-0efd-4208-a203-9264bc9963d9.png" alt=""></p><p>最后的 <strong>类</strong> 选项卡主要用于显示当前已加载和已卸载的类的数量。而 <strong>VM 概要</strong> 选项卡则主要用于显示虚拟机的相关参数，如下所示：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-519acfd8-943e-4005-b1af-9de1e4187971.png" alt=""></p><h3 id="visualvm" tabindex="-1"><a class="header-anchor" href="#visualvm" aria-hidden="true">#</a> VisualVM</h3><h4 id="简介-2" tabindex="-1"><a class="header-anchor" href="#简介-2" aria-hidden="true">#</a> 简介</h4><p>VisualVM（All-in-One Java Troubleshooting Tool）是 Oracle 提供的功能最强大的运行监视和故障处理程序之一， 它除了支持常规的运行监视、故障处理等功能外，还能用于性能分析（Profiling）。同时因为 VisualVM 是基于 NetBeans 平台的开发工具，所以它还支持通过插件来进行功能的拓展。VisualVM 的主要功能如下：</p><ul><li>显示虚拟机进程及其配置信息、环境信息（与 jps、jinfo 功能类似）；</li><li>监视应用程序的处理器、垃圾收集、堆、方法区以及线程的信息（与 jstat、jstack 功能类似）；</li><li>dump以及分析堆转储快照（与 jmap、jhat 功能类似）；</li><li>方法级的程序运行性能分析，找出被调用最多、运行时间最长的方法；</li><li>离线程序快照：可以收集程序的运行时配置、线程 dump、内存 dump 等信息来建立快照。</li></ul><h4 id="使用-1" tabindex="-1"><a class="header-anchor" href="#使用-1" aria-hidden="true">#</a> 使用</h4><p>打开位于 bin 目录下的 <code>jvisualvm</code> 程序， 它会自动扫描当前主机上的所有 JVM 进程：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-221c1e6e-bcfd-4bf3-be85-6172a3f72962.png" alt=""></p><p>点击需要监控的进程后，右侧即会显示相关的监控信息：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-0e0a833a-d13c-4b70-b7ee-c58651a58185.png" alt=""></p><p><strong>1. 堆 Dump</strong></p><p>在监控界面点击按钮可以 <strong>执行垃圾回收</strong> 或者 <strong>堆 Dump</strong> 。进行堆 Dump 后，还会显示其分析结果：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-afaf433c-6ae7-4c4b-b686-48504cd4c3e9.png" alt=""></p><p><strong>2. 线程 Dump</strong></p><p>在线程界面可以查看所有线程的状态，如果出现死锁，该界面还会进行提示：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-9dbc6b53-c9e6-4051-845f-ef2d848b5d60.png" alt=""></p><p>此时可以进行 <strong>线程 Dump</strong> 来获取具体的线程信息，效果和 jstack 命令类似：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-74941c88-d009-4d7f-8264-efc7d94c94ee.png" alt=""></p><p><strong>3. 性能分析</strong></p><p>在 Profiler 界面，可以进行 CPU 和 内存的性能分析。要开始性能分析，需要先选择 <strong>CPU</strong> 或 <strong>内存</strong> 按钮中的一个，VisualVM 将会开始记录应用程序执行过的所有方法：如果是进行的是 CPU 执行时间分析，将会统计每个方法的执行次数、执行耗时；如果是内存分析，则会统计每个方法关联的对象数以及这些对象所占的空间。想要结束性能分析，点击停止按钮即可：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-946d7f3e-9519-4a0b-8905-0bf2c1d83fcb.png" alt=""></p><p><strong>4. Visual GC</strong></p><p>Visual GC 面板默认是不显示的，需要通过插件进行扩展。它会实时监控虚拟机的状态，在功能上类似于 jstat 命令：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-b6f23234-8b1d-44df-8b12-e723dc0d1903.png" alt=""></p><h4 id="安装插件" tabindex="-1"><a class="header-anchor" href="#安装插件" aria-hidden="true">#</a> 安装插件</h4><p>在主界面，点击 <strong>工具 =&gt; 插件</strong> ，可以打开插件面板。右击插件选项或者点击安装按钮即可完成对应插件的安装：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-4518bc2f-ef1f-4ed6-8da9-47a0fdc03338.png" alt=""></p><p>需要注意的是，安装插件前需要按照自己 JVM 的版本来配置插件中心，否则会抛出 ”无法连接到插件中心“ 的异常。每个版本对应的插件中心可以在该网址上查看：https://visualvm.github.io/pluginscenters.html，界面如下：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-146f715c-a902-4725-9101-07d608a04770.png" alt=""></p><p>之后需要将正确的插件中心的地址配置到程序中：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-55919d48-88f4-4ee5-842f-3ed20b9f7cd6.png" alt=""></p><h3 id="连接远程进程" tabindex="-1"><a class="header-anchor" href="#连接远程进程" aria-hidden="true">#</a> 连接远程进程</h3><p>以上演示 JConsole 和 VisualVM 时，我们都是用的本地进程，但在实际开发中，我们更多需要监控的是服务器上的远程进程。想要监控远程主机上的进程，需要进行 JMX 的相关配置，根据连接时是否需要用户名和密码，可以分为以下两种配置方式：</p><h4 id="不使用安全凭证" tabindex="-1"><a class="header-anchor" href="#不使用安全凭证" aria-hidden="true">#</a> 不使用安全凭证</h4><p>启动服务器上的 Java 进程时增加以下参数：</p><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code> java -Dcom.sun.management.jmxremote.port<span class="token operator">=</span><span class="token number">12345</span>  <span class="token comment">#jmx远程连接的端口号</span>
  -Dcom.sun.management.jmxremote.ssl<span class="token operator">=</span>false 
@@ -92,6 +92,6 @@ OFF  SZ               TYPE DESCRIPTION               VALUE
 Instance size: 24 bytes
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 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>openJDK源码：查看 JDK native 方法的实现</p><p>strace：跟踪程序运行过程发起的系统调用</p><p>https://fastthread.io：线程栈分析的网站</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/problem-tools-6d57b323-9665-4453-9fee-ea3111ad8629.png" alt=""></p><h2 id="上问题排查思路-八股" tabindex="-1"><a class="header-anchor" href="#上问题排查思路-八股" aria-hidden="true">#</a> 上问题排查思路（八股）</h2><p>硬盘使用情况：du 命令</p><p>内存使用且情况：free 命令</p><p>CPU使用情况：top 命令</p><p>网络使用情况：netstat 命令</p><p>Java程序问题分析：jmap 分析堆内存、jstack 分析线程栈等，见前文。</p><ul><li>参考链接 1：<a href="https://www.cnblogs.com/z-sm/p/6745375.html" target="_blank" rel="noopener noreferrer">https://www.cnblogs.com/z-sm/p/6745375.html<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li>参考链接：<a href="https://github.com/heibaiying/Full-Stack-Notes/blob/master/notes/JVM_%E6%80%A7%E8%83%BD%E7%9B%91%E6%8E%A7%E4%B9%8B%E5%8F%AF%E8%A7%86%E5%8C%96%E5%B7%A5%E5%85%B7.md" target="_blank" rel="noopener noreferrer">https://github.com/heibaiying/Full-Stack-Notes/blob/master/notes/JVM_性能监控之可视化工具.md<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/jvm/problem-tools.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 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-    <script type="module" src="/assets/app.a0271b9c.js" defer></script>
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diff --git a/dist/jvm/tujie-gc.html b/dist/jvm/tujie-gc.html
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     <link rel="stylesheet" href="/assets/style.aa7884a9.css">
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class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->图解Java的垃圾回收机制</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span 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33.473z"></path></svg><span>2022年3月27日</span><meta property="datePublished" content="2022-03-27T04:07:13.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><li class="category category1" role>JVM</li><meta property="articleSection" content="Java核心,JVM"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 10 分钟</span><meta property="timeRequired" content="PT10M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="图解java的垃圾回收机制" tabindex="-1"><a class="header-anchor" href="#图解java的垃圾回收机制" aria-hidden="true">#</a> 图解Java的垃圾回收机制</h1><p>垃圾回收是一种在堆内存中找出哪些对象在被使用，还有哪些对象没被使用，并且将后者回收掉的机制。</p><p>所谓使用中的对象，指的是程序中还有引用的对象；而未使用中的对象，指的是程序中已经没有引用的对象，该对象占用的内存也可以被回收掉。</p><p>Java 语言出来之前，大家都在拼命的写 C 或者 C++ 的程序，此时存在一个很大的矛盾，C++ 等语言创建对象需要不断的去开辟空间，不用的时候又需要不断的去释放空间，既要写构造函数，又要写析构函数，很多时候都在重复的 allocated，然后不停的析构。而 Java 不一样，它有垃圾回收器，释放内存由回收器负责。</p><p>垃圾回收的第一步是标记。垃圾回收器此时会找出内存哪些在使用中，哪些不是。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/tujie-gc-9858785a-c6aa-4d6d-a6cd-640d24dd27d0.png" alt=""></p><p>上图中，蓝色表示已引用对象，橙色表示未引用对象。垃圾回收器要检查完所有的对象，才能知道哪些有被引用，哪些没。如果系统里所有的对象都要检查，那这一步可能会相当耗时间。</p><p>垃圾回收的第二步是清除，这一步会删掉标记出的未引用对象。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/tujie-gc-768f5a2c-6c81-4f76-b847-a41cc8413228.png" alt=""></p><p>内存分配器会保留指向可用内存中的引用，以分配给新的对象。</p><p>垃圾回收的第三步是压缩，为了提升性能，删除了未引用对象后，还可以将剩下的已引用对象放在一起（压缩），这样就能更简单快捷地分配新对象了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/tujie-gc-989889b6-adb4-4277-8c67-73d76658f744.png" alt=""></p><p>之前提到过，逐一标记和压缩  Java 虚拟机中的所有对象非常低效：分配的对象越多，垃圾回收需要的时间就越久。不过，根据统计，大部分的对象，其实用没多久就不用了。</p><p>来看个例子吧。下图中，竖轴代表已分配的字节，而横轴代表程序的运行时间。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/tujie-gc-24b154be-4ad0-4cc7-87e9-a3035bc9e3c5.png" alt=""></p><p>可见，存活（没被释放）的对象随着运行时间越来越少。图中左侧的峰值，也表明了大部分对象其实都挺短命的。</p><p>到这，这篇内容就分为两部分了，一部分是国外大神的讲解，一部分是阿里大神的讲解。先来看国外大神的。</p><hr><p>根据之前的规律，就可以用来提升 JVM 的效率了。方法是，把堆分成几个部分（就是所谓的分代），分别是新生代、老年代，以及永生代。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/tujie-gc-590c5011-48c4-4543-bd26-6f14c2b8614b.png" alt=""></p><p>新对象会被分配在新生代内存。一旦新生代内存满了，就会开始对死掉的对象，进行所谓的小型垃圾回收（Minor GC）过程。一片新生代内存里，死掉的越多，回收过程就越快；至于那些还活着的对象，此时就会老化，并最终老到进入老年代内存。</p><p>Stop the World 事件 —— 小型垃圾回收属于一种叫 &quot;Stop the World&quot; 的事件。在这种事件发生时，所有的程序线程都要暂停，直到事件完成（比如这里就是完成了所有回收工作）为止。</p><p>老年代用来保存长时间存活的对象。通常，设置一个阈值，当达到该年龄时，年轻代对象会被移动到老年代。最终老年代也会被回收。这个事件为 Major GC。</p><p>Major GC 也会触发STW（Stop the World）。通常，Major GC会慢很多，因为它涉及到所有存活对象。所以，对于响应性的应用程序，应该尽量避免Major GC。还要注意，Major GC的STW的时长受年老代垃圾回收器类型的影响。</p><p>永久代包含JVM用于描述应用程序中类和方法的元数据。永久代是由JVM在运行时根据应用程序使用的类来填充的。此外，Java SE类库和方法也存储在这里。</p><p>如果JVM发现某些类不再需要，并且其他类可能需要空间，则这些类可能会被回收。</p><p>首先，将任何新对象分配给 eden 空间。 两个 survivor 空间都是空的。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/tujie-gc-efe9657b-c7a6-48a8-9037-0e709b1d236c.jpg" alt=""></p><p>当 eden 空间填满时，会触发轻微的垃圾收集。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/tujie-gc-2497947b-92b5-4a7c-9399-1909a3153660.jpg" alt=""></p><p>引用的对象被移动到第一个 survivor 空间。 清除 eden 空间时，将删除未引用的对象。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/tujie-gc-2b431315-26fa-4ea0-843a-c63ca568f960.jpg" alt=""></p><p>在下一次Minor GC中，Eden区也会做同样的操作。删除未被引用的对象，并将被引用的对象移动到Survivor区。然而，这里，他们被移动到了第二个Survivor区（S1）。</p><p>此外，第一个Survivor区（S0）中，在上一次Minor GC幸存的对象，会增加年龄，并被移动到S1中。待所有幸存对象都被移动到S1后，S0和Eden区都会被清空。注意，Survivor区中有了不同年龄的对象。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/tujie-gc-e2560f59-9b24-4d16-88db-b6ac4d0b6ffe.jpg" alt=""></p><p>在下一次Minor GC中，会重复同样的操作。不过，这一次Survivor区会交换。被引用的对象移动到S0,。幸存的对象增加年龄。Eden区和S1被清空。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/tujie-gc-aa9f883a-12db-4c8b-8391-3c289b53d804.jpg" alt=""></p><p>此幻灯片演示了 promotion。 在较小的GC之后，当老化的物体达到一定的年龄阈值（在该示例中为8）时，它们从年轻一代晋升到老一代。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/tujie-gc-dec96816-2912-4127-aaaa-a4d987123f52.jpg" alt=""></p><p>随着较小的GC持续发生，物体将继续被推广到老一代空间。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/tujie-gc-6cb31f8a-2eac-489c-88bd-fc643996ab49.jpg" alt=""></p><p>所以这几乎涵盖了年轻一代的整个过程。 最终，将主要对老一代进行GC，清理并最终压缩该空间。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/tujie-gc-df98a004-e233-4fb5-a31a-f422033ecfa7.jpg" alt=""></p><hr><p>接下来，看阿里大神的版本。</p><p>Java 堆（Java Heap）是 JVM 所管理的内存中最大的一块，堆又是垃圾收集器管理的主要区域，这里我们主要分析一下 Java 堆的结构。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/tujie-gc-294701a5-1c50-4112-94a1-96a8bab80e34.png" alt=""></p><p>Java 堆主要分为 2 个区域-年轻代与老年代，其中年轻代又分 Eden 区和 Survivor 区，其中 Survivor 区又分 From 和 To 2 个区。可能这时候大家会有疑问，为什么需要 Survivor 区，为什么 Survivor 还要分 2 个区。</p><p>大多数情况下，对象会在新生代 Eden 区中进行分配。当 Eden 区没有足够空间进行分配时，虚拟机会发起一次 Minor GC，Minor GC 相比 Major GC 更频繁，回收速度也更快。</p><p>通过 Minor GC 之后，Eden 会被清空，Eden 区中绝大部分对象会被回收，而那些无需回收的存活对象，将会进到 Survivor 的 From 区（若 From 区不够，则直接进入 Old 区）。</p><p>Survivor 区相当于是 Eden 区和 Old 区的一个缓冲，类似于我们交通灯中的黄灯。Survivor 又分为 2 个区，一个是 From 区，一个是 To 区。每次执行 Minor GC，会将 Eden 区和 From 存活的对象放到 Survivor 的 To 区（如果 To 区不够，则直接进入 Old 区）。</p><p>之所以有 Survivor 区是因为如果没有 Survivor 区，Eden 区每进行一次 Minor GC，存活的对象就会被送到老年代，老年代很快就会被填满。而有很多对象虽然一次 Minor GC 没有消灭，但其实也并不会蹦跶多久，或许第二次，第三次就需要被清除。这时候移入老年区，很明显不是一个明智的决定。</p><p>所以，Survivor 的存在意义就是减少被送到老年代的对象，进而减少 Major GC 的发生。Survivor 的预筛选保证，只有经历 16 次 Minor GC 还能在新生代中存活的对象，才会被送到老年代。</p><p>设置两个 Survivor 区最大的好处就是解决内存碎片化。</p><p>我们先假设一下，Survivor 如果只有一个区域会怎样。Minor GC 执行后，Eden 区被清空了，存活的对象放到了 Survivor 区，而之前 Survivor 区中的对象，可能也有一些是需要被清除的。问题来了，这时候我们怎么清除它们？在这种场景下，我们只能标记清除，而我们知道标记清除最大的问题就是内存碎片，在新生代这种经常会消亡的区域，采用标记清除必然会让内存产生严重的碎片化。因为 Survivor 有 2 个区域，所以每次 Minor GC，会将之前 Eden 区和 From 区中的存活对象复制到 To 区域。第二次 Minor GC 时，From 与 To 职责互换，这时候会将 Eden 区和 To 区中的存活对象再复制到 From 区域，以此反复。</p><p>这种机制最大的好处就是，整个过程中，永远有一个 Survivor space 是空的，另一个非空的 Survivor space 是无碎片的。那么，Survivor 为什么不分更多块呢？比方说分成三个、四个、五个?显然，如果 Survivor 区再细分下去，每一块的空间就会比较小，容易导致 Survivor 区满，两块 Survivor 区可能是经过权衡之后的最佳方案。</p><p>老年代占据着 2/3 的堆内存空间，只有在 Major GC 的时候才会进行清理，每次 GC 都会触发“Stop-The-World”。内存越大，STW 的时间也越长，所以内存也不仅仅是越大就越好。在内存担保机制下，无法安置的对象会直接进到老年代，以下几种情况也会进入老年代。</p><p>1）<strong>大对象</strong>，指需要大量连续内存空间的对象，这部分对象不管是不是“朝生夕死”，都会直接进到老年代。这样做主要是为了避免在 Eden 区及 2 个 Survivor 区之间发生大量的内存复制。</p><p>2）<strong>长期存活对象</strong>，虚拟机给每个对象定义了一个对象年龄（Age）计数器。正常情况下对象会不断的在 Survivor 的 From 区与 To 区之间移动，对象在 Survivor 区中每经历一次 Minor GC，年龄就增加 1 岁。当年龄增加到 15 岁时，这时候就会被转移到老年代。当然，这里的 15，JVM 也支持进行特殊设置。</p><p>3）<strong>动态对象年龄</strong>，虚拟机并不重视要求对象年龄必须到 15 岁，才会放入老年区，如果 Survivor 空间中相同年龄所有对象大小的总合大于 Survivor 空间的一半，年龄大于等于该年龄的对象就可以直接进去老年区，无需等你“成年”。</p><p>这其实有点类似于负载均衡，轮询是负载均衡的一种，保证每台机器都分得同样的请求。看似很均衡，但每台机的硬件不通，健康状况不同，我们还可以基于每台机接受的请求数，或每台机的响应时间等，来调整我们的负载均衡算法。</p><hr><p>参考链接：<a href="https://mp.weixin.qq.com/s/RQGImK3-SrvJfs8eYCiv4A" target="_blank" rel="noopener noreferrer">https://mp.weixin.qq.com/s/RQGImK3-SrvJfs8eYCiv4A<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer 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data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 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142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 10 分钟</span><meta property="timeRequired" content="PT10M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="图解java的垃圾回收机制" tabindex="-1"><a class="header-anchor" href="#图解java的垃圾回收机制" aria-hidden="true">#</a> 图解Java的垃圾回收机制</h1><p>垃圾回收是一种在堆内存中找出哪些对象在被使用，还有哪些对象没被使用，并且将后者回收掉的机制。</p><p>所谓使用中的对象，指的是程序中还有引用的对象；而未使用中的对象，指的是程序中已经没有引用的对象，该对象占用的内存也可以被回收掉。</p><p>Java 语言出来之前，大家都在拼命的写 C 或者 C++ 的程序，此时存在一个很大的矛盾，C++ 等语言创建对象需要不断的去开辟空间，不用的时候又需要不断的去释放空间，既要写构造函数，又要写析构函数，很多时候都在重复的 allocated，然后不停的析构。而 Java 不一样，它有垃圾回收器，释放内存由回收器负责。</p><p>垃圾回收的第一步是标记。垃圾回收器此时会找出内存哪些在使用中，哪些不是。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/tujie-gc-9858785a-c6aa-4d6d-a6cd-640d24dd27d0.png" alt=""></p><p>上图中，蓝色表示已引用对象，橙色表示未引用对象。垃圾回收器要检查完所有的对象，才能知道哪些有被引用，哪些没。如果系统里所有的对象都要检查，那这一步可能会相当耗时间。</p><p>垃圾回收的第二步是清除，这一步会删掉标记出的未引用对象。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/tujie-gc-768f5a2c-6c81-4f76-b847-a41cc8413228.png" alt=""></p><p>内存分配器会保留指向可用内存中的引用，以分配给新的对象。</p><p>垃圾回收的第三步是压缩，为了提升性能，删除了未引用对象后，还可以将剩下的已引用对象放在一起（压缩），这样就能更简单快捷地分配新对象了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/tujie-gc-989889b6-adb4-4277-8c67-73d76658f744.png" alt=""></p><p>之前提到过，逐一标记和压缩  Java 虚拟机中的所有对象非常低效：分配的对象越多，垃圾回收需要的时间就越久。不过，根据统计，大部分的对象，其实用没多久就不用了。</p><p>来看个例子吧。下图中，竖轴代表已分配的字节，而横轴代表程序的运行时间。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/tujie-gc-24b154be-4ad0-4cc7-87e9-a3035bc9e3c5.png" alt=""></p><p>可见，存活（没被释放）的对象随着运行时间越来越少。图中左侧的峰值，也表明了大部分对象其实都挺短命的。</p><p>到这，这篇内容就分为两部分了，一部分是国外大神的讲解，一部分是阿里大神的讲解。先来看国外大神的。</p><hr><p>根据之前的规律，就可以用来提升 JVM 的效率了。方法是，把堆分成几个部分（就是所谓的分代），分别是新生代、老年代，以及永生代。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/tujie-gc-590c5011-48c4-4543-bd26-6f14c2b8614b.png" alt=""></p><p>新对象会被分配在新生代内存。一旦新生代内存满了，就会开始对死掉的对象，进行所谓的小型垃圾回收（Minor GC）过程。一片新生代内存里，死掉的越多，回收过程就越快；至于那些还活着的对象，此时就会老化，并最终老到进入老年代内存。</p><p>Stop the World 事件 —— 小型垃圾回收属于一种叫 &quot;Stop the World&quot; 的事件。在这种事件发生时，所有的程序线程都要暂停，直到事件完成（比如这里就是完成了所有回收工作）为止。</p><p>老年代用来保存长时间存活的对象。通常，设置一个阈值，当达到该年龄时，年轻代对象会被移动到老年代。最终老年代也会被回收。这个事件为 Major GC。</p><p>Major GC 也会触发STW（Stop the World）。通常，Major GC会慢很多，因为它涉及到所有存活对象。所以，对于响应性的应用程序，应该尽量避免Major GC。还要注意，Major GC的STW的时长受年老代垃圾回收器类型的影响。</p><p>永久代包含JVM用于描述应用程序中类和方法的元数据。永久代是由JVM在运行时根据应用程序使用的类来填充的。此外，Java SE类库和方法也存储在这里。</p><p>如果JVM发现某些类不再需要，并且其他类可能需要空间，则这些类可能会被回收。</p><p>首先，将任何新对象分配给 eden 空间。 两个 survivor 空间都是空的。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/tujie-gc-efe9657b-c7a6-48a8-9037-0e709b1d236c.jpg" alt=""></p><p>当 eden 空间填满时，会触发轻微的垃圾收集。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/tujie-gc-2497947b-92b5-4a7c-9399-1909a3153660.jpg" alt=""></p><p>引用的对象被移动到第一个 survivor 空间。 清除 eden 空间时，将删除未引用的对象。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/tujie-gc-2b431315-26fa-4ea0-843a-c63ca568f960.jpg" alt=""></p><p>在下一次Minor GC中，Eden区也会做同样的操作。删除未被引用的对象，并将被引用的对象移动到Survivor区。然而，这里，他们被移动到了第二个Survivor区（S1）。</p><p>此外，第一个Survivor区（S0）中，在上一次Minor GC幸存的对象，会增加年龄，并被移动到S1中。待所有幸存对象都被移动到S1后，S0和Eden区都会被清空。注意，Survivor区中有了不同年龄的对象。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/tujie-gc-e2560f59-9b24-4d16-88db-b6ac4d0b6ffe.jpg" alt=""></p><p>在下一次Minor GC中，会重复同样的操作。不过，这一次Survivor区会交换。被引用的对象移动到S0,。幸存的对象增加年龄。Eden区和S1被清空。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/tujie-gc-aa9f883a-12db-4c8b-8391-3c289b53d804.jpg" alt=""></p><p>此幻灯片演示了 promotion。 在较小的GC之后，当老化的物体达到一定的年龄阈值（在该示例中为8）时，它们从年轻一代晋升到老一代。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/tujie-gc-dec96816-2912-4127-aaaa-a4d987123f52.jpg" alt=""></p><p>随着较小的GC持续发生，物体将继续被推广到老一代空间。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/tujie-gc-6cb31f8a-2eac-489c-88bd-fc643996ab49.jpg" alt=""></p><p>所以这几乎涵盖了年轻一代的整个过程。 最终，将主要对老一代进行GC，清理并最终压缩该空间。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/tujie-gc-df98a004-e233-4fb5-a31a-f422033ecfa7.jpg" alt=""></p><hr><p>接下来，看阿里大神的版本。</p><p>Java 堆（Java Heap）是 JVM 所管理的内存中最大的一块，堆又是垃圾收集器管理的主要区域，这里我们主要分析一下 Java 堆的结构。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/tujie-gc-294701a5-1c50-4112-94a1-96a8bab80e34.png" alt=""></p><p>Java 堆主要分为 2 个区域-年轻代与老年代，其中年轻代又分 Eden 区和 Survivor 区，其中 Survivor 区又分 From 和 To 2 个区。可能这时候大家会有疑问，为什么需要 Survivor 区，为什么 Survivor 还要分 2 个区。</p><p>大多数情况下，对象会在新生代 Eden 区中进行分配。当 Eden 区没有足够空间进行分配时，虚拟机会发起一次 Minor GC，Minor GC 相比 Major GC 更频繁，回收速度也更快。</p><p>通过 Minor GC 之后，Eden 会被清空，Eden 区中绝大部分对象会被回收，而那些无需回收的存活对象，将会进到 Survivor 的 From 区（若 From 区不够，则直接进入 Old 区）。</p><p>Survivor 区相当于是 Eden 区和 Old 区的一个缓冲，类似于我们交通灯中的黄灯。Survivor 又分为 2 个区，一个是 From 区，一个是 To 区。每次执行 Minor GC，会将 Eden 区和 From 存活的对象放到 Survivor 的 To 区（如果 To 区不够，则直接进入 Old 区）。</p><p>之所以有 Survivor 区是因为如果没有 Survivor 区，Eden 区每进行一次 Minor GC，存活的对象就会被送到老年代，老年代很快就会被填满。而有很多对象虽然一次 Minor GC 没有消灭，但其实也并不会蹦跶多久，或许第二次，第三次就需要被清除。这时候移入老年区，很明显不是一个明智的决定。</p><p>所以，Survivor 的存在意义就是减少被送到老年代的对象，进而减少 Major GC 的发生。Survivor 的预筛选保证，只有经历 16 次 Minor GC 还能在新生代中存活的对象，才会被送到老年代。</p><p>设置两个 Survivor 区最大的好处就是解决内存碎片化。</p><p>我们先假设一下，Survivor 如果只有一个区域会怎样。Minor GC 执行后，Eden 区被清空了，存活的对象放到了 Survivor 区，而之前 Survivor 区中的对象，可能也有一些是需要被清除的。问题来了，这时候我们怎么清除它们？在这种场景下，我们只能标记清除，而我们知道标记清除最大的问题就是内存碎片，在新生代这种经常会消亡的区域，采用标记清除必然会让内存产生严重的碎片化。因为 Survivor 有 2 个区域，所以每次 Minor GC，会将之前 Eden 区和 From 区中的存活对象复制到 To 区域。第二次 Minor GC 时，From 与 To 职责互换，这时候会将 Eden 区和 To 区中的存活对象再复制到 From 区域，以此反复。</p><p>这种机制最大的好处就是，整个过程中，永远有一个 Survivor space 是空的，另一个非空的 Survivor space 是无碎片的。那么，Survivor 为什么不分更多块呢？比方说分成三个、四个、五个?显然，如果 Survivor 区再细分下去，每一块的空间就会比较小，容易导致 Survivor 区满，两块 Survivor 区可能是经过权衡之后的最佳方案。</p><p>老年代占据着 2/3 的堆内存空间，只有在 Major GC 的时候才会进行清理，每次 GC 都会触发“Stop-The-World”。内存越大，STW 的时间也越长，所以内存也不仅仅是越大就越好。在内存担保机制下，无法安置的对象会直接进到老年代，以下几种情况也会进入老年代。</p><p>1）<strong>大对象</strong>，指需要大量连续内存空间的对象，这部分对象不管是不是“朝生夕死”，都会直接进到老年代。这样做主要是为了避免在 Eden 区及 2 个 Survivor 区之间发生大量的内存复制。</p><p>2）<strong>长期存活对象</strong>，虚拟机给每个对象定义了一个对象年龄（Age）计数器。正常情况下对象会不断的在 Survivor 的 From 区与 To 区之间移动，对象在 Survivor 区中每经历一次 Minor GC，年龄就增加 1 岁。当年龄增加到 15 岁时，这时候就会被转移到老年代。当然，这里的 15，JVM 也支持进行特殊设置。</p><p>3）<strong>动态对象年龄</strong>，虚拟机并不重视要求对象年龄必须到 15 岁，才会放入老年区，如果 Survivor 空间中相同年龄所有对象大小的总合大于 Survivor 空间的一半，年龄大于等于该年龄的对象就可以直接进去老年区，无需等你“成年”。</p><p>这其实有点类似于负载均衡，轮询是负载均衡的一种，保证每台机器都分得同样的请求。看似很均衡，但每台机的硬件不通，健康状况不同，我们还可以基于每台机接受的请求数，或每台机的响应时间等，来调整我们的负载均衡算法。</p><hr><p>参考链接：<a href="https://mp.weixin.qq.com/s/RQGImK3-SrvJfs8eYCiv4A" target="_blank" rel="noopener noreferrer">https://mp.weixin.qq.com/s/RQGImK3-SrvJfs8eYCiv4A<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path 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33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月27日</span><meta property="datePublished" content="2022-03-27T04:07:13.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" 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class="external-link-icon-sr-only">open in new window</span></span></a> 的程序后，我很好奇，它是怎么在 Run 面板里打印出‘三妹，少看手机少打游戏，好好学，美美哒’呢？”三妹咪了一口麦香可可奶茶后对我说。</p><p>“三妹，我们通常把 Java 分为编译期和运行时，弄清楚这两个阶段就知道原因了。由于运行时涉及到的内容比较多，这篇文章我们先来说说编译期，随后我们再来分析运行时。”</p><p>贴一下 HelloWorld 这段代码：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token doc-comment comment">/**
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25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 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40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><li class="category category1" role>JVM</li><meta property="articleSection" content="Java核心,JVM"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 4 分钟</span><meta property="timeRequired" content="PT4M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="java程序在编译期发生了什么" tabindex="-1"><a class="header-anchor" href="#java程序在编译期发生了什么" aria-hidden="true">#</a> Java程序在编译期发生了什么？</h1><p>“二哥，看了上一篇 <a href="https://mp.weixin.qq.com/s/191I_2CVOxVuyfLVtb4jhg" target="_blank" rel="noopener noreferrer">Hello World<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a> 的程序后，我很好奇，它是怎么在 Run 面板里打印出‘三妹，少看手机少打游戏，好好学，美美哒’呢？”三妹咪了一口麦香可可奶茶后对我说。</p><p>“三妹，我们通常把 Java 分为编译期和运行时，弄清楚这两个阶段就知道原因了。由于运行时涉及到的内容比较多，这篇文章我们先来说说编译期，随后我们再来分析运行时。”</p><p>贴一下 HelloWorld 这段代码：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token doc-comment comment">/**
  * <span class="token keyword">@author</span> 微信搜「沉默王二」，回复关键字 PDF
  */</span>
 <span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">HelloWorld</span> <span class="token punctuation">{</span>
@@ -99,6 +99,6 @@ public class com/itwanger/five/HelloWorld {
     MAXLOCALS = 1
 }
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>是不是就有点懵逼了？新手看到这个很容易头大，不过不要担心，后面我再和大家一块深入研究一下，这里就是感受一下字节码的魅力。</p><p>那这个字节码文件是怎么看到的呢？可以通过 IDEA 菜单栏中的「View」→「Show Bytecode」查看，如下图所示。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/overview/five-04.png" alt=""></p><p>PS：字节码并不是机器码，操作系统无法直接识别，需要在操作系统上安装不同版本的 Java 虚拟机（JVM）来识别。通常情况下，我们只需要安装不同版本的 JDK（Java Development Kit，Java 开发工具包）就行了，它里面包含了 JRE（Java Runtime Environment，Java 运行时环境），而 JRE 又包含了 JVM。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/overview/five-05.png" alt=""></p><p>Windows、Linux、MacOS 等操作系统都有相应的 JDK，只要安装好了 JDK 就有了 Java 语言的运行时环境，就可以把一份字节码文件在不同的平台上运行了。可以在 <a href="https://www.oracle.com/java/technologies/javase-jdk11-downloads.html" target="_blank" rel="noopener noreferrer">Oracle 官网<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>上下载不同版本的 JDK。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/overview/five-06.png" alt=""></p><p>PPS：为什么要查看字节码呢？查看字节码文件更容易让我们搞懂 Java 代码背后的原理，比如搞懂 Java 中的各种语法糖的本质。</p><p>相比于 IDEA 自带的「Show Bytecode」功能，我更推荐 <code>jclasslib</code> 这款插件，可以在插件市场中安装（我已经安装过了）。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/overview/five-07.png" alt=""></p><p>安装完成之后，点击 View -&gt; Show Bytecode With jclasslib 即可通过 jclasslib 查看字节码文件了（点击之前，光标要停留在对应的类文件上），如下图所示。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/overview/five-08.png" alt=""></p><p>使用 jclasslib 不仅可以直观地查看类对应的字节码文件，还可以查看类的基本信息、常量池、接口、字段、方法等信息，如下图所示。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/overview/five-09.png" alt=""></p><p>也就是说，在编译阶段，Java 会将 Java 源代码文件编译为字节码文件。在这个阶段，编译器会进行一些检查工作，比如说，某个关键字是不是写错了，语法上是不是符合预期了，不能有很明显的错误，否则带到运行时再检查出来就会比较麻烦了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/overview/five-10.png" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/jvm/what-happen-when-javac.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/14 上午7:14:28</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><!----><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/whereis-the-object.html" class="nav-link sidebar-link sidebar-page" aria-label="Java 创建的对象到底放在哪"><!---->Java 创建的对象到底放在哪<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/gc.html" class="nav-link sidebar-link sidebar-page" aria-label="从头到尾说一次Java垃圾回收"><!---->从头到尾说一次Java垃圾回收<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/tujie-gc.html" class="nav-link sidebar-link sidebar-page" aria-label="图解Java的垃圾回收机制"><!---->图解Java的垃圾回收机制<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/problem-tools.html" class="nav-link sidebar-link sidebar-page" aria-label="Java问题诊断和排查工具"><!---->Java问题诊断和排查工具<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/jit.html" class="nav-link sidebar-link sidebar-page" aria-label="JIT原理解析及实践"><!---->JIT原理解析及实践<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/oom.html" class="nav-link sidebar-link sidebar-page" aria-label="内存溢出排查优化实战"><!---->内存溢出排查优化实战<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/cpu-percent-100.html" class="nav-link sidebar-link sidebar-page" aria-label="CPU 100% 排查优化实践"><!---->CPU 100% 排查优化实践<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/zongjie.html" class="nav-link sidebar-link sidebar-page" aria-label="JVM 核心知识点总结"><!---->JVM 核心知识点总结<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->JVM到底是什么？</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 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0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><li class="category category1" role>JVM</li><meta property="articleSection" content="Java核心,JVM"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 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19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 10 分钟</span><meta property="timeRequired" content="PT10M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="jvm到底是什么" tabindex="-1"><a class="header-anchor" href="#jvm到底是什么" aria-hidden="true">#</a> JVM到底是什么？</h1><p>“二哥，之前的文章里提到 JVM，说实在的， 我还不知道它到底是干嘛的，你能给我普及一下吗？”三妹咪了一口麦香可可奶茶后对我说。</p><p>“三妹，不要担心，这篇文章来带你认识一下什么是 JVM，这也是 Java 中非常重要的一块知识，每个程序员都应该了解的。”说完最后这句话，我脸上忍不住泛起了一阵羞涩的红晕。</p><p>看过《<a href="https://mp.weixin.qq.com/s/Ctouw652iC0qtrmjen9aEw" target="_blank" rel="noopener noreferrer">Java 发展简史<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>》的小伙伴应该知道，Sun 在 1991 年成立了一个由詹姆斯·高斯林（James Gosling）领导的，名为“Green”的项目组，目的是开发一种能够在各种消费性电子产品上运行的程序架构。</p><p>一开始，项目组打算使用 C++，但 C++ 无法达到跨平台的要求，比如在 Windows 系统下编译的 Hello.exe 无法直接拿到 Linux 环境下执行。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/overview/seven-01.png" alt=""></p><p>在当时，C++ 已经非常流行了，但无法跨平台，只能忍痛割爱了。</p><p>怎么办呢？</p><p>三妹不知道有没有听过直译器（解释器）这玩意？（估计你没听过）就是每跑一行代码就生成机器码，然后执行，比如说 Python 和 Ruby 用的就是直译器。在每个操作系统上装一个直译器就好了，跨平台的目的就达到了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/overview/seven-02.png" alt=""></p><p>但直译器有个缺点，就是没法像编译器那样对一些热点代码进行优化，从而让机器码跑得更快一些。</p><p>怎么办呢？</p><p>来个结合体呗，编译器和直译器一块上！</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/overview/seven-03.png" alt=""></p><p>编译器负责把 Java 源代码编译成字节码（不清楚的小伙伴可以点击链接查看<a href="https://mp.weixin.qq.com/s/GYDFndO0Q1Nqzcc_Te61gw" target="_blank" rel="noopener noreferrer">上一节<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>），Java 虚拟机（Java Virtual Machine，简称 JVM） 负责把字节码转换成机器码。转换的时候，可以做一些压缩或者优化，这样的机器码跑起来就快多了。</p><p>不仅跨平台的目的达到了，而且性能得到了优化。</p><p>三妹是不是想问，“为什么 Java 虚拟机会叫 Java 虚拟机呢？”</p><p>虚拟机，顾名思义，就是虚拟的机器（多苍白的解释），反正就是看不见摸不着的机器，把它想象成一个会执行字节码的怪兽吧。</p><p>记得上大学那会，由于没有 Linux 环境，但又需要在上面玩一些命令，于是就在 Windows 上装 Linux 的虚拟机，这个 JVM 就类似这种东西。</p><p>说白了，就是我们编写 Java 代码，编译 Java 代码，目的不是让它在 Linux、Windows 或者 MacOS 上跑，而是在 JVM 上跑。</p><p>说到这，三妹是不是想问，“都有哪些 Java 虚拟机呢？”来看下面这张思维导图：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/overview/seven-04.png" alt=""></p><p>除了我们经常看到，经常听到的 Hotspot VM，还有很多，下面我来简单介绍一下。</p><ul><li><p>Sun Classic：世界上第一款商用 Java 虚拟机，但执行效率低下，导致 Java 程序的性能和 C/C++ 存在很大差距，因此给后来者留下了“Java 语言很慢”的刻板印象。</p></li><li><p>Exact VM：为了提升 Classic 的效率，Sun 的虚拟机团队曾在 Solaris（Sun 研发的一款类似 Unix 的操作系统）上发布过这款虚拟机，它的执行系统里包含有热点探测、即时编译等，但不是很成熟。</p></li></ul><p>Sun Classic 在 JDK 1.4 的时候被彻底抛弃，而 Exact VM 被抛弃得更早，取代它的正是 HotSpot VM——时也命也。</p><ul><li>HotSpot VM：OracleJDK（商用）和 OpenJDK（开源）的默认虚拟机，也是目前使用最广泛的 Java 虚拟机。</li></ul><p>HotSpot 的技术优势就在于热点代码探测技术（名字就从这来）和准确式内存管理技术，但其实这两个技术在 Exact VM 中都有体现，因此你看起个好的名字多重要（开玩笑了，这就是命）。</p><p>热点代码探测，指的是，通过执行计数器找出最具有编译价值的代码，然后通知即时编译器以方法为单位进行编译，解释器就可以不再逐行的将字节码翻译成机器码，而是将一整个方法的所有字节码翻译成机器码再执行。</p><p>这样的话，效率就提高了很多，对吧？</p><ul><li><p>Mobile VM：Java 在移动手机端（被 Android 和 IOS 二分天下）的发展并没有那么成功，因此 Mobile VM 的声望值比较低。</p></li><li><p>Embedded VM：嵌入式设备上的虚拟机。</p></li><li><p>BEA JRockit：曾经号称是“世界上最快的 Java 虚拟机”，后来被 Oracle 收购后就没有声音了。</p></li><li><p>IBM J9 VM：提起 IBM，基本上所有程序员都知道了，也是个巨头，所以他家的虚拟机也很强，在职责分离和模块化上做得比 HotSpot 更好。目前已经开源给 Eclipse 基金会。</p></li><li><p>BEA Liquid VM：是 BEA 公司开发的可以直接运行在自家系统上的虚拟机，可以越过操作系统直接和硬件打交道，因此可以更大程度上的发挥硬件的能力。不过核心用的还是 JRockit，所以伴随着 JRockit 的消失，Liquid VM 也退出历史舞台了。</p></li><li><p>Azul VM：是 Azul 公司在 HotSpot 基础上进行大量改进后的，可以运行在 Azul 公司专有硬件上的虚拟机。2010 年起，Azul 公司的重心从硬件转移到软件上，并发布了 Zing 虚拟机，性能方面很强大。</p></li><li><p>Apache Harmony 和 Google Android Dalvik VM 并不是 严格意义上的 Java 虚拟机，但对 Java 虚拟机的发展起到了很大的刺激作用。但它们终究没有熬过时间。</p></li><li><p>Microsoft JVM：在早期的 Java Applets 年代，微软为了在 IE 中支持 Applets 开发了自己的 Java 虚拟机。你敢相信？Microsoft JVM 只有 Windows 版本，它与 JVM 实现的“一次编译，到处运行”的理念完全沾不上边。</p></li></ul><p>关键是，1997 年 10 月，Sun 公司因为这事把微软告了，最后微软赔给了 Sun 公司 2000 万美金，并且终止了在 Java 虚拟机方面的发展。如果，我是说如果，如果微软保持着对 Java 的热情，后面还有 .Net 什么事？</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/overview/seven-05.png" alt=""></p><p>解释了这么多 Java 虚拟机后，三妹是不是想问，“Java 虚拟机长什么样子呢？”</p><p>Java 虚拟机虽然是虚拟的，但它的内部是可以划分为：</p><ul><li>类加载器（Class Loader）</li><li>运行时数据区（Runtime Data Areas）</li><li>执行引擎（Excution Engine）</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/overview/seven-06.png" alt=""></p><p><strong>1）类加载器</strong></p><p>类加载器是 Java 虚拟机的一个子系统，用于加载类文件。每当我们运行一个 Java 程序，它都会由类加载器首先加载。</p><p>一般来说，Java 程序员并不需要直接同类加载器进行交互。JVM 默认的行为就已经足够满足大多数情况的需求了。不过，如果遇到了需要和类加载器进行交互的情况，而对类加载器的机制又不是很了解的话，就不得不花大量的时间去调试 <code>ClassNotFoundException</code> 和 <code>NoClassDefFoundError</code> 等异常。</p><p>对于任意一个类，都需要由它的类加载器和这个类本身一同确定其在 JVM 中的唯一性。也就是说，如果两个类的加载器不同，即使两个类来源于同一个字节码文件，那这两个类就必定不相等（比如两个类的 Class 对象不 <code>equals</code>）。</p><p>来通过一段简单的代码了解下。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token doc-comment comment">/**
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clickable"><!----><span class="title">2.1 Java概述</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.2 Java基础语法</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.3 面向对象编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.4 字符串&amp;数组</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.5 集合框架（容器）</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.6 IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.11 并发编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">2.12 JVM</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a aria-current="page" href="/jvm/what-is-jvm.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="JVM到底是什么？"><!---->JVM到底是什么？<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/how-run-java-code.html" class="nav-link sidebar-link sidebar-page" aria-label="JVM到底是如何运行Java代码的"><!---->JVM到底是如何运行Java代码的<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/class-load.html" class="nav-link sidebar-link sidebar-page" aria-label="类加载机制"><!---->类加载机制<!----></a><ul 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Debugger）<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/asm.html" class="nav-link sidebar-link sidebar-page" aria-label="史上最通俗易懂的ASM教程"><!---->史上最通俗易懂的ASM教程<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/compile-jdk.html" class="nav-link sidebar-link sidebar-page" aria-label="自己编译JDK"><!---->自己编译JDK<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/neicun-jiegou.html" class="nav-link sidebar-link sidebar-page" aria-label="深入理解JVM的内存结构"><!---->深入理解JVM的内存结构<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/whereis-the-object.html" class="nav-link sidebar-link sidebar-page" aria-label="Java 创建的对象到底放在哪"><!---->Java 创建的对象到底放在哪<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/gc.html" class="nav-link sidebar-link sidebar-page" aria-label="从头到尾说一次Java垃圾回收"><!---->从头到尾说一次Java垃圾回收<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/tujie-gc.html" class="nav-link sidebar-link sidebar-page" aria-label="图解Java的垃圾回收机制"><!---->图解Java的垃圾回收机制<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/problem-tools.html" class="nav-link sidebar-link sidebar-page" aria-label="Java问题诊断和排查工具"><!---->Java问题诊断和排查工具<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/jit.html" class="nav-link sidebar-link sidebar-page" aria-label="JIT原理解析及实践"><!---->JIT原理解析及实践<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/oom.html" class="nav-link sidebar-link sidebar-page" aria-label="内存溢出排查优化实战"><!---->内存溢出排查优化实战<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/cpu-percent-100.html" class="nav-link sidebar-link sidebar-page" aria-label="CPU 100% 排查优化实践"><!---->CPU 100% 排查优化实践<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/zongjie.html" class="nav-link sidebar-link sidebar-page" aria-label="JVM 核心知识点总结"><!---->JVM 核心知识点总结<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->JVM到底是什么？</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 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aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><li class="category category1" role>JVM</li><meta property="articleSection" content="Java核心,JVM"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 10 分钟</span><meta property="timeRequired" content="PT10M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="jvm到底是什么" tabindex="-1"><a class="header-anchor" href="#jvm到底是什么" aria-hidden="true">#</a> JVM到底是什么？</h1><p>“二哥，之前的文章里提到 JVM，说实在的， 我还不知道它到底是干嘛的，你能给我普及一下吗？”三妹咪了一口麦香可可奶茶后对我说。</p><p>“三妹，不要担心，这篇文章来带你认识一下什么是 JVM，这也是 Java 中非常重要的一块知识，每个程序员都应该了解的。”说完最后这句话，我脸上忍不住泛起了一阵羞涩的红晕。</p><p>看过《<a href="https://mp.weixin.qq.com/s/Ctouw652iC0qtrmjen9aEw" target="_blank" rel="noopener noreferrer">Java 发展简史<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>》的小伙伴应该知道，Sun 在 1991 年成立了一个由詹姆斯·高斯林（James Gosling）领导的，名为“Green”的项目组，目的是开发一种能够在各种消费性电子产品上运行的程序架构。</p><p>一开始，项目组打算使用 C++，但 C++ 无法达到跨平台的要求，比如在 Windows 系统下编译的 Hello.exe 无法直接拿到 Linux 环境下执行。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/overview/seven-01.png" alt=""></p><p>在当时，C++ 已经非常流行了，但无法跨平台，只能忍痛割爱了。</p><p>怎么办呢？</p><p>三妹不知道有没有听过直译器（解释器）这玩意？（估计你没听过）就是每跑一行代码就生成机器码，然后执行，比如说 Python 和 Ruby 用的就是直译器。在每个操作系统上装一个直译器就好了，跨平台的目的就达到了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/overview/seven-02.png" alt=""></p><p>但直译器有个缺点，就是没法像编译器那样对一些热点代码进行优化，从而让机器码跑得更快一些。</p><p>怎么办呢？</p><p>来个结合体呗，编译器和直译器一块上！</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/overview/seven-03.png" alt=""></p><p>编译器负责把 Java 源代码编译成字节码（不清楚的小伙伴可以点击链接查看<a href="https://mp.weixin.qq.com/s/GYDFndO0Q1Nqzcc_Te61gw" target="_blank" rel="noopener noreferrer">上一节<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>），Java 虚拟机（Java Virtual Machine，简称 JVM） 负责把字节码转换成机器码。转换的时候，可以做一些压缩或者优化，这样的机器码跑起来就快多了。</p><p>不仅跨平台的目的达到了，而且性能得到了优化。</p><p>三妹是不是想问，“为什么 Java 虚拟机会叫 Java 虚拟机呢？”</p><p>虚拟机，顾名思义，就是虚拟的机器（多苍白的解释），反正就是看不见摸不着的机器，把它想象成一个会执行字节码的怪兽吧。</p><p>记得上大学那会，由于没有 Linux 环境，但又需要在上面玩一些命令，于是就在 Windows 上装 Linux 的虚拟机，这个 JVM 就类似这种东西。</p><p>说白了，就是我们编写 Java 代码，编译 Java 代码，目的不是让它在 Linux、Windows 或者 MacOS 上跑，而是在 JVM 上跑。</p><p>说到这，三妹是不是想问，“都有哪些 Java 虚拟机呢？”来看下面这张思维导图：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/overview/seven-04.png" alt=""></p><p>除了我们经常看到，经常听到的 Hotspot VM，还有很多，下面我来简单介绍一下。</p><ul><li><p>Sun Classic：世界上第一款商用 Java 虚拟机，但执行效率低下，导致 Java 程序的性能和 C/C++ 存在很大差距，因此给后来者留下了“Java 语言很慢”的刻板印象。</p></li><li><p>Exact VM：为了提升 Classic 的效率，Sun 的虚拟机团队曾在 Solaris（Sun 研发的一款类似 Unix 的操作系统）上发布过这款虚拟机，它的执行系统里包含有热点探测、即时编译等，但不是很成熟。</p></li></ul><p>Sun Classic 在 JDK 1.4 的时候被彻底抛弃，而 Exact VM 被抛弃得更早，取代它的正是 HotSpot VM——时也命也。</p><ul><li>HotSpot VM：OracleJDK（商用）和 OpenJDK（开源）的默认虚拟机，也是目前使用最广泛的 Java 虚拟机。</li></ul><p>HotSpot 的技术优势就在于热点代码探测技术（名字就从这来）和准确式内存管理技术，但其实这两个技术在 Exact VM 中都有体现，因此你看起个好的名字多重要（开玩笑了，这就是命）。</p><p>热点代码探测，指的是，通过执行计数器找出最具有编译价值的代码，然后通知即时编译器以方法为单位进行编译，解释器就可以不再逐行的将字节码翻译成机器码，而是将一整个方法的所有字节码翻译成机器码再执行。</p><p>这样的话，效率就提高了很多，对吧？</p><ul><li><p>Mobile VM：Java 在移动手机端（被 Android 和 IOS 二分天下）的发展并没有那么成功，因此 Mobile VM 的声望值比较低。</p></li><li><p>Embedded VM：嵌入式设备上的虚拟机。</p></li><li><p>BEA JRockit：曾经号称是“世界上最快的 Java 虚拟机”，后来被 Oracle 收购后就没有声音了。</p></li><li><p>IBM J9 VM：提起 IBM，基本上所有程序员都知道了，也是个巨头，所以他家的虚拟机也很强，在职责分离和模块化上做得比 HotSpot 更好。目前已经开源给 Eclipse 基金会。</p></li><li><p>BEA Liquid VM：是 BEA 公司开发的可以直接运行在自家系统上的虚拟机，可以越过操作系统直接和硬件打交道，因此可以更大程度上的发挥硬件的能力。不过核心用的还是 JRockit，所以伴随着 JRockit 的消失，Liquid VM 也退出历史舞台了。</p></li><li><p>Azul VM：是 Azul 公司在 HotSpot 基础上进行大量改进后的，可以运行在 Azul 公司专有硬件上的虚拟机。2010 年起，Azul 公司的重心从硬件转移到软件上，并发布了 Zing 虚拟机，性能方面很强大。</p></li><li><p>Apache Harmony 和 Google Android Dalvik VM 并不是 严格意义上的 Java 虚拟机，但对 Java 虚拟机的发展起到了很大的刺激作用。但它们终究没有熬过时间。</p></li><li><p>Microsoft JVM：在早期的 Java Applets 年代，微软为了在 IE 中支持 Applets 开发了自己的 Java 虚拟机。你敢相信？Microsoft JVM 只有 Windows 版本，它与 JVM 实现的“一次编译，到处运行”的理念完全沾不上边。</p></li></ul><p>关键是，1997 年 10 月，Sun 公司因为这事把微软告了，最后微软赔给了 Sun 公司 2000 万美金，并且终止了在 Java 虚拟机方面的发展。如果，我是说如果，如果微软保持着对 Java 的热情，后面还有 .Net 什么事？</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/overview/seven-05.png" alt=""></p><p>解释了这么多 Java 虚拟机后，三妹是不是想问，“Java 虚拟机长什么样子呢？”</p><p>Java 虚拟机虽然是虚拟的，但它的内部是可以划分为：</p><ul><li>类加载器（Class Loader）</li><li>运行时数据区（Runtime Data Areas）</li><li>执行引擎（Excution Engine）</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/overview/seven-06.png" alt=""></p><p><strong>1）类加载器</strong></p><p>类加载器是 Java 虚拟机的一个子系统，用于加载类文件。每当我们运行一个 Java 程序，它都会由类加载器首先加载。</p><p>一般来说，Java 程序员并不需要直接同类加载器进行交互。JVM 默认的行为就已经足够满足大多数情况的需求了。不过，如果遇到了需要和类加载器进行交互的情况，而对类加载器的机制又不是很了解的话，就不得不花大量的时间去调试 <code>ClassNotFoundException</code> 和 <code>NoClassDefFoundError</code> 等异常。</p><p>对于任意一个类，都需要由它的类加载器和这个类本身一同确定其在 JVM 中的唯一性。也就是说，如果两个类的加载器不同，即使两个类来源于同一个字节码文件，那这两个类就必定不相等（比如两个类的 Class 对象不 <code>equals</code>）。</p><p>来通过一段简单的代码了解下。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token doc-comment comment">/**
  * <span class="token keyword">@author</span> 微信搜「沉默王二」，回复关键字 PDF
  */</span>
 <span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">Test</span> <span class="token punctuation">{</span>
@@ -57,6 +57,6 @@
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>每个 Java 类都维护着一个指向定义它的类加载器的引用，通过 <code>类名.class.getClassLoader()</code> 可以获取到此引用；然后通过 <code>loader.getParent()</code> 可以获取类加载器的上层类加载器。</p><p>上面这段代码的输出结果如下：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>jdk.internal.loader.ClassLoaders$AppClassLoader@512ddf17
 jdk.internal.loader.ClassLoaders$PlatformClassLoader@2d209079
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><p>第一行输出为 Test 的类加载器，即应用类加载器，它是 <code>jdk.internal.loader.ClassLoaders$AppClassLoader</code> 类的实例；第二行输出为平台类加载器，是 <code>jdk.internal.loader.ClassLoaders$PlatformClassLoader</code> 类的实例。那启动类加载器呢？</p><p>按理说，扩展类加载器的上层类加载器是启动类加载器，但启动类加载器是虚拟机的内置类加载器，通常表示为 null。</p><p><strong>2）运行时数据区</strong></p><p>来看下面这张图：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/overview/seven-07.png" alt=""></p><ul><li><p>PC寄存器（PC Register），也叫程序计数器（Program Counter Register），是一块较小的内存空间，它的作用可以看做是当前线程所执行的字节码的信号指示器。</p></li><li><p>JVM 栈（Java Virtual Machine Stack），与 PC 寄存器一样，JVM 栈也是线程私有的。每一个 JVM 线程都有自己的 JVM 栈，这个栈与线程同时创建，它的生命周期与线程相同。</p></li><li><p>本地方法栈（Native Method Stack），JVM 可能会使用到传统的栈来支持 Native 方法（使用 Java 语言以外的其它语言［C语言］编写的方法）的执行，这个栈就是本地方法栈。</p></li><li><p>堆（Heap），在 JVM 中，堆是可供各条线程共享的运行时内存区域，也是供所有类实例和数据对象分配内存的区域。</p></li><li><p>方法区（Method area），在 JVM 中，被加载类型的信息都保存在方法区中。包括类型信息（Type Information）和方法列表（Method Tables）。方法区是所有线程共享的，所以访问方法区信息的方法必须是线程安全的。</p></li><li><p>运行时常量池（Runtime Constant Pool），运行时常量池是每一个类或接口的常量池在运行时的表现形式，它包括了编译器可知的数值字面量，以及运行期解析后才能获得的方法或字段的引用。简而言之，当一个方法或者变量被引用时，JVM 通过运行时常量区来查找方法或者变量在内存里的实际地址。</p></li></ul><p><strong>3）执行引擎</strong></p><p>执行引擎包含了：</p><ul><li><p>解释器：读取字节码流，然后执行指令。因为它是一行一行地解释和执行指令，所以它可以很快地解释字节码，但是执行起来会比较慢（毕竟要一行执行完再执行下一行）。</p></li><li><p>即时（Just-In-Time，JIT）编译器：即时编译器用来弥补解释器的缺点，提高性能。执行引擎首先按照解释执行的方式来执行，然后在合适的时候，即时编译器把整段字节码编译成本地代码。然后，执行引擎就没有必要再去解释执行方法了，它可以直接通过本地代码去执行。执行本地代码比一条一条进行解释执行的速度快很多。编译后的代码可以执行的很快，因为本地代码是保存在缓存里的。</p></li></ul><p>“三妹，关于 Java 虚拟机，今天我们就学到这吧，后面再展开讲，怎么样？”转动了一下僵硬的脖子后，我对三妹说，“Java 虚拟机是一块很大很深的内容，如果一上来学太多的话，我怕难倒你。”</p><p>“好的，二哥，我也觉得今天的知识量够了，我要好好消化几天。我会加油的！”三妹似乎对未来充满了希望，这正是我想看到的。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/jvm/what-is-jvm.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/14 上午7:14:28</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><!----><a href="/jvm/how-run-java-code.html" class="nav-link next" aria-label="JVM到底是如何运行Java代码的"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">JVM到底是如何运行Java代码的<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
-    <script type="module" src="/assets/app.a0271b9c.js" defer></script>
+    <script type="module" src="/assets/app.615e41d8.js" defer></script>
   </body>
 </html>
diff --git a/dist/jvm/whereis-the-object.html b/dist/jvm/whereis-the-object.html
index 600afb59..a271bf3b 100644
--- a/dist/jvm/whereis-the-object.html
+++ b/dist/jvm/whereis-the-object.html
@@ -39,10 +39,10 @@
       }
     </script>
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aria-label="虚拟机是如何执行字节码指令的"><!---->虚拟机是如何执行字节码指令的<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/hsdb.html" class="nav-link sidebar-link sidebar-page" aria-label="HSDB（Hotspot Debugger）"><!---->HSDB（Hotspot Debugger）<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/asm.html" class="nav-link sidebar-link sidebar-page" aria-label="史上最通俗易懂的ASM教程"><!---->史上最通俗易懂的ASM教程<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/compile-jdk.html" class="nav-link sidebar-link sidebar-page" aria-label="自己编译JDK"><!---->自己编译JDK<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/neicun-jiegou.html" class="nav-link sidebar-link sidebar-page" aria-label="深入理解JVM的内存结构"><!---->深入理解JVM的内存结构<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/jvm/whereis-the-object.html" class="router-link-active 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href="/jvm/problem-tools.html" class="nav-link sidebar-link sidebar-page" aria-label="Java问题诊断和排查工具"><!---->Java问题诊断和排查工具<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/jit.html" class="nav-link sidebar-link sidebar-page" aria-label="JIT原理解析及实践"><!---->JIT原理解析及实践<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/oom.html" class="nav-link sidebar-link sidebar-page" aria-label="内存溢出排查优化实战"><!---->内存溢出排查优化实战<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/cpu-percent-100.html" class="nav-link sidebar-link sidebar-page" aria-label="CPU 100% 排查优化实践"><!---->CPU 100% 排查优化实践<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/zongjie.html" class="nav-link sidebar-link sidebar-page" aria-label="JVM 核心知识点总结"><!---->JVM 核心知识点总结<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span 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content="PT3M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/whereis-the-object.html#一、对象优先在-eden-分配" class="router-link-active router-link-exact-active toc-link level3">一、对象优先在 Eden 分配</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/whereis-the-object.html#二、大对象直接进入老年代" class="router-link-active router-link-exact-active toc-link level3">二、大对象直接进入老年代</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/whereis-the-object.html#三、长期存活的对象将进入老年代" class="router-link-active router-link-exact-active toc-link level3">三、长期存活的对象将进入老年代</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/whereis-the-object.html#四、动态年龄判断" class="router-link-active router-link-exact-active toc-link level3">四、动态年龄判断</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/whereis-the-object.html#五、空间分配担保" class="router-link-active router-link-exact-active toc-link level3">五、空间分配担保</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="java-创建的对象到底放在哪" tabindex="-1"><a class="header-anchor" href="#java-创建的对象到底放在哪" aria-hidden="true">#</a> Java 创建的对象到底放在哪？</h1><p>大家好，我是二哥呀。创建对象的时候，对象是在堆内存中创建的。但堆内存又分为新生代和老年代，新生代又细分为 Eden 空间、From Survivor 空间、To Survivor 空间。<strong>那我们创建的对象到底在哪里</strong>？</p><h3 id="一、对象优先在-eden-分配" tabindex="-1"><a class="header-anchor" href="#一、对象优先在-eden-分配" aria-hidden="true">#</a> 一、对象优先在 Eden 分配</h3><p>堆内存分为新生代和老年代，新生代是用于存放使用后准备被回收的对象，老年代是用于存放生命周期比较长的对象。</p><p>大部分我们创建的对象，都属于生命周期比较短的，所以会存放在新生代。新生代又细分 Eden 空间、From Survivor 空间、To Survivor 空间，我们创建的对象优先在 Eden 分配。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/whereis-the-object-1.png" alt=""></p><p>随着对象的创建，Eden 剩余内存空间越来越少，就会触发 Minor GC，于是 Eden 的存活对象会放入 From Survivor 空间。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/whereis-the-object-2.png" alt=""></p><p>Minor GC 后，新对象依然会往 Eden 分配。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/whereis-the-object-3.png" alt=""></p><p>Eden 剩余内存空间越来越少，又会触发 Minor GC，于是 Eden 和 From Survivor 的存活对象会放入 To Survivor 空间。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/whereis-the-object-4.png" alt=""></p><h3 id="二、大对象直接进入老年代" tabindex="-1"><a class="header-anchor" href="#二、大对象直接进入老年代" aria-hidden="true">#</a> 二、大对象直接进入老年代</h3><p>在上面的流程中，如果一个对象很大，一直在 Survivor 空间复制来复制去，那很费性能，所以这些大对象直接进入老年代。</p><p>可以用 <code>XX:PretenureSizeThreshold</code> 来设置这些大对象的阈值。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/whereis-the-object-5.png" alt=""></p><h3 id="三、长期存活的对象将进入老年代" tabindex="-1"><a class="header-anchor" href="#三、长期存活的对象将进入老年代" aria-hidden="true">#</a> 三、长期存活的对象将进入老年代</h3><p>在上面的流程中，如果一个对象 Hello_A，已经经历了 15 次 Minor GC 还存活在 Survivor 空间中，那他即将转移到老年代。这个 15 可以通过 <code>-XX:MaxTenuringThreshold</code> 来设置的，默认是 15。</p><p>虚拟机为了给对象计算他到底经历了几次 Minor GC，会给每个对象定义了一个对象年龄计数器。如果对象在 Eden 中经过第一次 Minor GC 后仍然存活，移动到 Survivor 空间年龄加 1，在 Survivor 区中每经历过 Minor GC 后仍然存活年龄再加 1。年龄到了 15，就到了老年代。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/whereis-the-object-6.png" alt=""></p><h3 id="四、动态年龄判断" tabindex="-1"><a class="header-anchor" href="#四、动态年龄判断" aria-hidden="true">#</a> 四、动态年龄判断</h3><p>除了年龄达到 MaxTenuringThreshold 的值，还有另外一个方式进入老年代，那就是动态年龄判断：在 Survivor 空间中相同年龄所有对象大小的总和大于 Survivor 空间的一半，年龄大于或等于该年龄的对象就可以直接进入老年代。</p><p>比如 Survivor 是 100M，Hello1 和 Hello2 都是 3 岁，且总和超过了 50M，Hello3 是 4 岁，这个时候，这三个对象都将到老年代。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/whereis-the-object-7.png" alt=""></p><h3 id="五、空间分配担保" tabindex="-1"><a class="header-anchor" href="#五、空间分配担保" aria-hidden="true">#</a> 五、空间分配担保</h3><p>上面的流程提过，存活的对象都会放入另外一个 Survivor 空间，如果这些存活的对象比 Survivor 空间还大呢？整个流程如下：</p><ul><li>Minor GC 之前，虚拟机会先检查老年代最大可用的连续空间是否大于新生代所有对象总空间，如果大于，则发起 Minor GC。</li><li>如果小于，则看 HandlePromotionFailure 有没有设置，如果没有设置，就发起 full gc。</li><li>如果设置了 HandlePromotionFailure，则看老年代最大可用的连续空间是否大于历次晋升到老年代对象的平均大小，如果小于，就发起 full gc。</li><li>如果大于，发起 Minor GC。Minor GC 后，看 Survivor 空间是否足够存放存活对象，如果不够，就放入老年代，如果够放，就直接存放 Survivor 空间。如果老年代都不够放存活对象，担保失败（Handle Promotion Failure），发起 full gc。</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/whereis-the-object-8.png" alt=""></p><p>好了，今天就分享到这儿吧，我是二哥呀，我们下期见~~</p><hr><blockquote><p>原文链接：juejin.cn/post/7052894117105238053</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/jvm/whereis-the-object.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg 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class="sidebar-heading clickable"><!----><span class="title">2.6 IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.11 并发编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">2.12 JVM</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/jvm/what-is-jvm.html" class="nav-link sidebar-link sidebar-page" aria-label="JVM到底是什么？"><!---->JVM到底是什么？<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/how-run-java-code.html" class="nav-link sidebar-link sidebar-page" aria-label="JVM到底是如何运行Java代码的"><!---->JVM到底是如何运行Java代码的<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/class-load.html" class="nav-link sidebar-link sidebar-page" aria-label="类加载机制"><!---->类加载机制<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/class-file-jiegou.html" class="nav-link sidebar-link sidebar-page" aria-label="详解Java的类文件结构"><!---->详解Java的类文件结构<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/bytecode.html" class="nav-link sidebar-link sidebar-page" aria-label="从javap的角度轻松看懂字节码"><!---->从javap的角度轻松看懂字节码<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/zijiema-zhiling.html" class="nav-link sidebar-link sidebar-page" aria-label="字节码指令详解"><!---->字节码指令详解<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/how-jvm-run-zijiema-zhiling.html" class="nav-link sidebar-link sidebar-page" aria-label="虚拟机是如何执行字节码指令的"><!---->虚拟机是如何执行字节码指令的<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/hsdb.html" class="nav-link sidebar-link sidebar-page" aria-label="HSDB（Hotspot Debugger）"><!---->HSDB（Hotspot Debugger）<!----></a><ul 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class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="一、对象优先在 Eden 分配"><!---->一、对象优先在 Eden 分配<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/whereis-the-object.html#二、大对象直接进入老年代" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="二、大对象直接进入老年代"><!---->二、大对象直接进入老年代<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/whereis-the-object.html#三、长期存活的对象将进入老年代" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="三、长期存活的对象将进入老年代"><!---->三、长期存活的对象将进入老年代<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/whereis-the-object.html#四、动态年龄判断" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="四、动态年龄判断"><!---->四、动态年龄判断<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/whereis-the-object.html#五、空间分配担保" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="五、空间分配担保"><!---->五、空间分配担保<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/jvm/gc.html" class="nav-link sidebar-link sidebar-page" aria-label="从头到尾说一次Java垃圾回收"><!---->从头到尾说一次Java垃圾回收<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/tujie-gc.html" class="nav-link sidebar-link sidebar-page" aria-label="图解Java的垃圾回收机制"><!---->图解Java的垃圾回收机制<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/problem-tools.html" class="nav-link sidebar-link sidebar-page" aria-label="Java问题诊断和排查工具"><!---->Java问题诊断和排查工具<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/jit.html" class="nav-link sidebar-link sidebar-page" aria-label="JIT原理解析及实践"><!---->JIT原理解析及实践<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/oom.html" class="nav-link sidebar-link sidebar-page" aria-label="内存溢出排查优化实战"><!---->内存溢出排查优化实战<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/cpu-percent-100.html" class="nav-link sidebar-link sidebar-page" aria-label="CPU 100% 排查优化实践"><!---->CPU 100% 排查优化实践<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/zongjie.html" class="nav-link sidebar-link sidebar-page" aria-label="JVM 核心知识点总结"><!---->JVM 核心知识点总结<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java 创建的对象到底放在哪？</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 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19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 3 分钟</span><meta property="timeRequired" content="PT3M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/whereis-the-object.html#一、对象优先在-eden-分配" class="router-link-active router-link-exact-active toc-link level3">一、对象优先在 Eden 分配</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/whereis-the-object.html#二、大对象直接进入老年代" class="router-link-active router-link-exact-active toc-link level3">二、大对象直接进入老年代</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/whereis-the-object.html#三、长期存活的对象将进入老年代" class="router-link-active router-link-exact-active toc-link level3">三、长期存活的对象将进入老年代</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/whereis-the-object.html#四、动态年龄判断" class="router-link-active router-link-exact-active toc-link level3">四、动态年龄判断</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/whereis-the-object.html#五、空间分配担保" class="router-link-active router-link-exact-active toc-link level3">五、空间分配担保</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="java-创建的对象到底放在哪" tabindex="-1"><a class="header-anchor" href="#java-创建的对象到底放在哪" aria-hidden="true">#</a> Java 创建的对象到底放在哪？</h1><p>大家好，我是二哥呀。创建对象的时候，对象是在堆内存中创建的。但堆内存又分为新生代和老年代，新生代又细分为 Eden 空间、From Survivor 空间、To Survivor 空间。<strong>那我们创建的对象到底在哪里</strong>？</p><h3 id="一、对象优先在-eden-分配" tabindex="-1"><a class="header-anchor" href="#一、对象优先在-eden-分配" aria-hidden="true">#</a> 一、对象优先在 Eden 分配</h3><p>堆内存分为新生代和老年代，新生代是用于存放使用后准备被回收的对象，老年代是用于存放生命周期比较长的对象。</p><p>大部分我们创建的对象，都属于生命周期比较短的，所以会存放在新生代。新生代又细分 Eden 空间、From Survivor 空间、To Survivor 空间，我们创建的对象优先在 Eden 分配。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/whereis-the-object-1.png" alt=""></p><p>随着对象的创建，Eden 剩余内存空间越来越少，就会触发 Minor GC，于是 Eden 的存活对象会放入 From Survivor 空间。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/whereis-the-object-2.png" alt=""></p><p>Minor GC 后，新对象依然会往 Eden 分配。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/whereis-the-object-3.png" alt=""></p><p>Eden 剩余内存空间越来越少，又会触发 Minor GC，于是 Eden 和 From Survivor 的存活对象会放入 To Survivor 空间。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/whereis-the-object-4.png" alt=""></p><h3 id="二、大对象直接进入老年代" tabindex="-1"><a class="header-anchor" href="#二、大对象直接进入老年代" aria-hidden="true">#</a> 二、大对象直接进入老年代</h3><p>在上面的流程中，如果一个对象很大，一直在 Survivor 空间复制来复制去，那很费性能，所以这些大对象直接进入老年代。</p><p>可以用 <code>XX:PretenureSizeThreshold</code> 来设置这些大对象的阈值。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/whereis-the-object-5.png" alt=""></p><h3 id="三、长期存活的对象将进入老年代" tabindex="-1"><a class="header-anchor" href="#三、长期存活的对象将进入老年代" aria-hidden="true">#</a> 三、长期存活的对象将进入老年代</h3><p>在上面的流程中，如果一个对象 Hello_A，已经经历了 15 次 Minor GC 还存活在 Survivor 空间中，那他即将转移到老年代。这个 15 可以通过 <code>-XX:MaxTenuringThreshold</code> 来设置的，默认是 15。</p><p>虚拟机为了给对象计算他到底经历了几次 Minor GC，会给每个对象定义了一个对象年龄计数器。如果对象在 Eden 中经过第一次 Minor GC 后仍然存活，移动到 Survivor 空间年龄加 1，在 Survivor 区中每经历过 Minor GC 后仍然存活年龄再加 1。年龄到了 15，就到了老年代。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/whereis-the-object-6.png" alt=""></p><h3 id="四、动态年龄判断" tabindex="-1"><a class="header-anchor" href="#四、动态年龄判断" aria-hidden="true">#</a> 四、动态年龄判断</h3><p>除了年龄达到 MaxTenuringThreshold 的值，还有另外一个方式进入老年代，那就是动态年龄判断：在 Survivor 空间中相同年龄所有对象大小的总和大于 Survivor 空间的一半，年龄大于或等于该年龄的对象就可以直接进入老年代。</p><p>比如 Survivor 是 100M，Hello1 和 Hello2 都是 3 岁，且总和超过了 50M，Hello3 是 4 岁，这个时候，这三个对象都将到老年代。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/whereis-the-object-7.png" alt=""></p><h3 id="五、空间分配担保" tabindex="-1"><a class="header-anchor" href="#五、空间分配担保" aria-hidden="true">#</a> 五、空间分配担保</h3><p>上面的流程提过，存活的对象都会放入另外一个 Survivor 空间，如果这些存活的对象比 Survivor 空间还大呢？整个流程如下：</p><ul><li>Minor GC 之前，虚拟机会先检查老年代最大可用的连续空间是否大于新生代所有对象总空间，如果大于，则发起 Minor GC。</li><li>如果小于，则看 HandlePromotionFailure 有没有设置，如果没有设置，就发起 full gc。</li><li>如果设置了 HandlePromotionFailure，则看老年代最大可用的连续空间是否大于历次晋升到老年代对象的平均大小，如果小于，就发起 full gc。</li><li>如果大于，发起 Minor GC。Minor GC 后，看 Survivor 空间是否足够存放存活对象，如果不够，就放入老年代，如果够放，就直接存放 Survivor 空间。如果老年代都不够放存活对象，担保失败（Handle Promotion Failure），发起 full gc。</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/whereis-the-object-8.png" alt=""></p><p>好了，今天就分享到这儿吧，我是二哥呀，我们下期见~~</p><hr><blockquote><p>原文链接：juejin.cn/post/7052894117105238053</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/jvm/whereis-the-object.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 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href="/jvm/whereis-the-object.html" class="nav-link sidebar-link sidebar-page" aria-label="Java 创建的对象到底放在哪"><!---->Java 创建的对象到底放在哪<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/gc.html" class="nav-link sidebar-link sidebar-page" aria-label="从头到尾说一次Java垃圾回收"><!---->从头到尾说一次Java垃圾回收<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/tujie-gc.html" class="nav-link sidebar-link sidebar-page" aria-label="图解Java的垃圾回收机制"><!---->图解Java的垃圾回收机制<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/problem-tools.html" class="nav-link sidebar-link sidebar-page" aria-label="Java问题诊断和排查工具"><!---->Java问题诊断和排查工具<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/jit.html" class="nav-link sidebar-link sidebar-page" aria-label="JIT原理解析及实践"><!---->JIT原理解析及实践<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/oom.html" class="nav-link sidebar-link sidebar-page" aria-label="内存溢出排查优化实战"><!---->内存溢出排查优化实战<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/cpu-percent-100.html" class="nav-link sidebar-link sidebar-page" aria-label="CPU 100% 排查优化实践"><!---->CPU 100% 排查优化实践<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/zongjie.html" class="nav-link sidebar-link sidebar-page" aria-label="JVM 核心知识点总结"><!---->JVM 核心知识点总结<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->JVM字节码指令详解</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 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0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><li class="category category1" role>JVM</li><meta property="articleSection" content="Java核心,JVM"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 17 分钟</span><meta property="timeRequired" content="PT17M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zijiema-zhiling.html#_01、加载与存储指令" class="router-link-active router-link-exact-active toc-link level3">01、加载与存储指令</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zijiema-zhiling.html#_02、算术指令" class="router-link-active router-link-exact-active toc-link level3">02、算术指令</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zijiema-zhiling.html#_03、类型转换指令" class="router-link-active router-link-exact-active toc-link level3">03、类型转换指令</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zijiema-zhiling.html#_04、对象的创建和访问指令" class="router-link-active router-link-exact-active toc-link level3">04、对象的创建和访问指令</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zijiema-zhiling.html#_05、方法调用和返回指令" class="router-link-active router-link-exact-active toc-link level3">05、方法调用和返回指令</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zijiema-zhiling.html#_06、操作数栈管理指令" class="router-link-active router-link-exact-active toc-link level3">06、操作数栈管理指令</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zijiema-zhiling.html#_07、控制转移指令" class="router-link-active router-link-exact-active toc-link level3">07、控制转移指令</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="jvm字节码指令详解" tabindex="-1"><a class="header-anchor" href="#jvm字节码指令详解" aria-hidden="true">#</a> JVM字节码指令详解</h1><p>大家好，我是二哥呀。Java 字节码指令是 JVM 体系中非常难啃的一块硬骨头，我估计有些读者会有这样的疑惑，“Java 字节码难学吗？我能不能学会啊？”</p><p>讲良心话，不是我谦虚，一开始学 Java 字节码和 Java 虚拟机方面的知识我也感觉头大！但硬着头皮学了一阵子之后，突然就开窍了，觉得好有意思，尤其是明白了 Java 代码在底层竟然是这样执行的时候，感觉既膨胀又飘飘然，浑身上下散发着自信的光芒！</p><p>Java 官方的虚拟机 Hotspot 是基于栈的，而不是基于寄存器的。</p><p>基于栈的优点是可移植性更好、指令更短、实现起来简单，但不能随机访问栈中的元素，完成相同功能所需要的指令数也比寄存器的要多，需要频繁的入栈和出栈。</p><p>基于寄存器的优点是速度快，有利于程序运行速度的优化，但操作数需要显式指定，指令也比较长。</p><p>Java 字节码由操作码和操作数组成。</p><ul><li>操作码（Opcode）：一个字节长度（0-255，意味着指令集的操作码总数不可能超过 256 条），代表着某种特定的操作含义。</li><li>操作数（Operands）：零个或者多个，紧跟在操作码之后，代表此操作需要的参数。</li></ul><p>由于 Java 虚拟机是基于栈而不是寄存器的结构，所以大多数指令都只有一个操作码。比如 <code>aload_0</code>（将局部变量表中下标为 0 的数据压入操作数栈中）就只有操作码没有操作数，而 <code>invokespecial #1</code>（调用成员方法或者构造方法，并传递常量池中下标为 1 的常量）就是由操作码和操作数组成的。</p><h3 id="_01、加载与存储指令" tabindex="-1"><a class="header-anchor" href="#_01、加载与存储指令" aria-hidden="true">#</a> 01、加载与存储指令</h3><p>加载（load）和存储（store）相关的指令是使用最频繁的指令，用于将数据从栈帧的局部变量表和操作数栈之间来回传递。</p><p><strong>1）将局部变量表中的变量压入操作数栈中</strong></p><ul><li><code>xload_&lt;n&gt;</code>（x 为 i、l、f、d、a，n 默认为 0 到 3），表示将第 n 个局部变量压入操作数栈中。</li><li>xload（x 为 i、l、f、d、a），通过指定参数的形式，将局部变量压入操作数栈中，当使用这个指令时，表示局部变量的数量可能超过了 4 个</li></ul><p>解释一下。</p><p>x 为操作码助记符，表明是哪一种数据类型。见下表所示。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/zijiema-zhiling-879da2f2-fb72-48a9-985e-5a28a9fc8814.png" alt=""></p><p>像 arraylength 指令，没有操作码助记符，它没有代表数据类型的特殊字符，但操作数只能是一个数组类型的对象。</p><p>大部分的指令都不支持 byte、short 和 char，甚至没有任何指令支持 boolean 类型。编译器会将 byte 和 short 类型的数据带符号扩展（Sign-Extend）为 int 类型，将 boolean 和 char 零位扩展（Zero-Extend）为 int 类型。</p><p>举例来说。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">private</span> <span class="token keyword">void</span> <span class="token function">load</span><span class="token punctuation">(</span><span class="token keyword">int</span> age<span class="token punctuation">,</span> <span class="token class-name">String</span> name<span class="token punctuation">,</span> <span class="token keyword">long</span> birthday<span class="token punctuation">,</span> <span class="token keyword">boolean</span> sex<span class="token punctuation">)</span> <span class="token punctuation">{</span>
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class="sidebar-heading clickable"><!----><span class="title">2.6 IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.11 并发编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">2.12 JVM</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/jvm/what-is-jvm.html" class="nav-link sidebar-link sidebar-page" aria-label="JVM到底是什么？"><!---->JVM到底是什么？<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/how-run-java-code.html" class="nav-link sidebar-link sidebar-page" aria-label="JVM到底是如何运行Java代码的"><!---->JVM到底是如何运行Java代码的<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/class-load.html" class="nav-link sidebar-link sidebar-page" aria-label="类加载机制"><!---->类加载机制<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/class-file-jiegou.html" class="nav-link sidebar-link sidebar-page" aria-label="详解Java的类文件结构"><!---->详解Java的类文件结构<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/bytecode.html" class="nav-link sidebar-link sidebar-page" aria-label="从javap的角度轻松看懂字节码"><!---->从javap的角度轻松看懂字节码<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/jvm/zijiema-zhiling.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="字节码指令详解"><!---->字节码指令详解<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/zijiema-zhiling.html#_01、加载与存储指令" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="01、加载与存储指令"><!---->01、加载与存储指令<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/zijiema-zhiling.html#_02、算术指令" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="02、算术指令"><!---->02、算术指令<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/zijiema-zhiling.html#_03、类型转换指令" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="03、类型转换指令"><!---->03、类型转换指令<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/zijiema-zhiling.html#_04、对象的创建和访问指令" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="04、对象的创建和访问指令"><!---->04、对象的创建和访问指令<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/zijiema-zhiling.html#_05、方法调用和返回指令" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="05、方法调用和返回指令"><!---->05、方法调用和返回指令<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/zijiema-zhiling.html#_06、操作数栈管理指令" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="06、操作数栈管理指令"><!---->06、操作数栈管理指令<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/zijiema-zhiling.html#_07、控制转移指令" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="07、控制转移指令"><!---->07、控制转移指令<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/jvm/how-jvm-run-zijiema-zhiling.html" class="nav-link sidebar-link sidebar-page" aria-label="虚拟机是如何执行字节码指令的"><!---->虚拟机是如何执行字节码指令的<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/hsdb.html" class="nav-link sidebar-link sidebar-page" aria-label="HSDB（Hotspot Debugger）"><!---->HSDB（Hotspot Debugger）<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/asm.html" class="nav-link sidebar-link sidebar-page" aria-label="史上最通俗易懂的ASM教程"><!---->史上最通俗易懂的ASM教程<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/compile-jdk.html" class="nav-link sidebar-link sidebar-page" aria-label="自己编译JDK"><!---->自己编译JDK<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/neicun-jiegou.html" class="nav-link sidebar-link sidebar-page" aria-label="深入理解JVM的内存结构"><!---->深入理解JVM的内存结构<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/whereis-the-object.html" class="nav-link sidebar-link sidebar-page" aria-label="Java 创建的对象到底放在哪"><!---->Java 创建的对象到底放在哪<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/gc.html" class="nav-link sidebar-link sidebar-page" aria-label="从头到尾说一次Java垃圾回收"><!---->从头到尾说一次Java垃圾回收<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/tujie-gc.html" class="nav-link sidebar-link sidebar-page" aria-label="图解Java的垃圾回收机制"><!---->图解Java的垃圾回收机制<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/problem-tools.html" class="nav-link sidebar-link sidebar-page" aria-label="Java问题诊断和排查工具"><!---->Java问题诊断和排查工具<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/jit.html" class="nav-link sidebar-link sidebar-page" aria-label="JIT原理解析及实践"><!---->JIT原理解析及实践<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/oom.html" class="nav-link sidebar-link sidebar-page" aria-label="内存溢出排查优化实战"><!---->内存溢出排查优化实战<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/cpu-percent-100.html" class="nav-link sidebar-link sidebar-page" aria-label="CPU 100% 排查优化实践"><!---->CPU 100% 排查优化实践<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/zongjie.html" class="nav-link sidebar-link sidebar-page" aria-label="JVM 核心知识点总结"><!---->JVM 核心知识点总结<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->JVM字节码指令详解</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 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142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 17 分钟</span><meta property="timeRequired" content="PT17M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zijiema-zhiling.html#_01、加载与存储指令" class="router-link-active router-link-exact-active toc-link level3">01、加载与存储指令</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zijiema-zhiling.html#_02、算术指令" class="router-link-active router-link-exact-active toc-link level3">02、算术指令</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zijiema-zhiling.html#_03、类型转换指令" class="router-link-active router-link-exact-active toc-link level3">03、类型转换指令</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zijiema-zhiling.html#_04、对象的创建和访问指令" class="router-link-active router-link-exact-active toc-link level3">04、对象的创建和访问指令</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zijiema-zhiling.html#_05、方法调用和返回指令" class="router-link-active router-link-exact-active toc-link level3">05、方法调用和返回指令</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zijiema-zhiling.html#_06、操作数栈管理指令" class="router-link-active router-link-exact-active toc-link level3">06、操作数栈管理指令</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zijiema-zhiling.html#_07、控制转移指令" class="router-link-active router-link-exact-active toc-link level3">07、控制转移指令</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="jvm字节码指令详解" tabindex="-1"><a class="header-anchor" href="#jvm字节码指令详解" aria-hidden="true">#</a> JVM字节码指令详解</h1><p>大家好，我是二哥呀。Java 字节码指令是 JVM 体系中非常难啃的一块硬骨头，我估计有些读者会有这样的疑惑，“Java 字节码难学吗？我能不能学会啊？”</p><p>讲良心话，不是我谦虚，一开始学 Java 字节码和 Java 虚拟机方面的知识我也感觉头大！但硬着头皮学了一阵子之后，突然就开窍了，觉得好有意思，尤其是明白了 Java 代码在底层竟然是这样执行的时候，感觉既膨胀又飘飘然，浑身上下散发着自信的光芒！</p><p>Java 官方的虚拟机 Hotspot 是基于栈的，而不是基于寄存器的。</p><p>基于栈的优点是可移植性更好、指令更短、实现起来简单，但不能随机访问栈中的元素，完成相同功能所需要的指令数也比寄存器的要多，需要频繁的入栈和出栈。</p><p>基于寄存器的优点是速度快，有利于程序运行速度的优化，但操作数需要显式指定，指令也比较长。</p><p>Java 字节码由操作码和操作数组成。</p><ul><li>操作码（Opcode）：一个字节长度（0-255，意味着指令集的操作码总数不可能超过 256 条），代表着某种特定的操作含义。</li><li>操作数（Operands）：零个或者多个，紧跟在操作码之后，代表此操作需要的参数。</li></ul><p>由于 Java 虚拟机是基于栈而不是寄存器的结构，所以大多数指令都只有一个操作码。比如 <code>aload_0</code>（将局部变量表中下标为 0 的数据压入操作数栈中）就只有操作码没有操作数，而 <code>invokespecial #1</code>（调用成员方法或者构造方法，并传递常量池中下标为 1 的常量）就是由操作码和操作数组成的。</p><h3 id="_01、加载与存储指令" tabindex="-1"><a class="header-anchor" href="#_01、加载与存储指令" aria-hidden="true">#</a> 01、加载与存储指令</h3><p>加载（load）和存储（store）相关的指令是使用最频繁的指令，用于将数据从栈帧的局部变量表和操作数栈之间来回传递。</p><p><strong>1）将局部变量表中的变量压入操作数栈中</strong></p><ul><li><code>xload_&lt;n&gt;</code>（x 为 i、l、f、d、a，n 默认为 0 到 3），表示将第 n 个局部变量压入操作数栈中。</li><li>xload（x 为 i、l、f、d、a），通过指定参数的形式，将局部变量压入操作数栈中，当使用这个指令时，表示局部变量的数量可能超过了 4 个</li></ul><p>解释一下。</p><p>x 为操作码助记符，表明是哪一种数据类型。见下表所示。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/zijiema-zhiling-879da2f2-fb72-48a9-985e-5a28a9fc8814.png" alt=""></p><p>像 arraylength 指令，没有操作码助记符，它没有代表数据类型的特殊字符，但操作数只能是一个数组类型的对象。</p><p>大部分的指令都不支持 byte、short 和 char，甚至没有任何指令支持 boolean 类型。编译器会将 byte 和 short 类型的数据带符号扩展（Sign-Extend）为 int 类型，将 boolean 和 char 零位扩展（Zero-Extend）为 int 类型。</p><p>举例来说。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">private</span> <span class="token keyword">void</span> <span class="token function">load</span><span class="token punctuation">(</span><span class="token keyword">int</span> age<span class="token punctuation">,</span> <span class="token class-name">String</span> name<span class="token punctuation">,</span> <span class="token keyword">long</span> birthday<span class="token punctuation">,</span> <span class="token keyword">boolean</span> sex<span class="token punctuation">)</span> <span class="token punctuation">{</span>
     <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span>age <span class="token operator">+</span> name <span class="token operator">+</span> birthday <span class="token operator">+</span> sex<span class="token punctuation">)</span><span class="token punctuation">;</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>通过 jclasslib 看一下 <code>load()</code> 方法（4 个参数）的字节码指令。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/zijiema-zhiling-05bfae95-2a33-402c-9041-570093729c42.png" alt=""></p><ul><li>iload_1：将局部变量表中下标为 1 的 int 变量压入操作数栈中。</li><li>aload_2：将局部变量表中下标为 2 的引用数据类型变量（此时为 String）压入操作数栈中。</li><li>lload_3：将局部变量表中下标为 3 的 long 型变量压入操作数栈中。</li><li>iload 5：将局部变量表中下标为 5 的 int 变量（实际为 boolean）压入操作数栈中。</li></ul><p>通过查看局部变量表就能关联上了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/zijiema-zhiling-79d74946-ce9e-41d4-b889-bda861f847bc.png" alt=""></p><p><strong>2）将常量池中的常量压入操作数栈中</strong></p><p>根据数据类型和入栈内容的不同，此类又可以细分为 const 系列、push 系列和 Idc 指令。</p><p><strong>const 系列</strong>，用于特殊的常量入栈，要入栈的常量隐含在指令本身。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/zijiema-zhiling-270c314d-872b-43b0-861f-417eafc046fd.png" alt=""></p><p><strong>push 系列</strong>，主要包括 bipush 和 sipush，前者接收 8 位整数作为参数，后者接收 16 位整数。</p><p><strong>Idc 指令</strong>，当 const 和 push 不能满足的时候，万能的 Idc 指令就上场了，它接收一个 8 位的参数，指向常量池中的索引。</p><ul><li><code>Idc_w</code>：接收两个 8 位数，索引范围更大。</li><li>如果参数是 long 或者 double，使用 <code>Idc2_w</code> 指令。</li></ul><p>举例来说。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">pushConstLdc</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
@@ -211,6 +211,6 @@ public class com.itwanger.jvm.InvokeExamples {
     <span class="token punctuation">}</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>通过 jclasslib 看一下 <code>switchTest()</code> 方法的字节码指令。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/jvm/zijiema-zhiling-04e166ae-13c7-4025-804a-be88e2923a50.png" alt=""></p><p>case 2 的时候没有 break，所以 case 2 和 case 3 是连续的，用的是 tableswitch。如果等于 1，跳转到 28 行；如果等于 2 和 3，跳转到 34 行，如果是 default，跳转到 40 行。</p><p><strong>5）无条件跳转指令</strong></p><p>goto 指令接收两个字节的操作数，共同组成一个带符号的整数，用于指定指令的偏移量，指令执行的目的就是跳转到偏移量给定的位置处。</p><p>前面的例子里都出现了 goto 的身影，也很好理解。如果指令的偏移量特别大，超出了两个字节的范围，可以使用指令 goto_w，接收 4 个字节的操作数。</p><hr><p>更多指令，可以阅读下面这篇文章：</p><blockquote><p>https://segmentfault.com/a/1190000037628881</p></blockquote><blockquote><p>路漫漫其修远兮，吾将上下而求索</p></blockquote><p>想要走得更远，Java 字节码这块就必须得硬碰硬地吃透，希望二哥的这些分享可以帮助到大家~</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/jvm/zijiema-zhiling.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/14 上午7:14:28</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/jvm/bytecode.html" class="nav-link prev" aria-label="从javap的角度轻松看懂字节码"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->从javap的角度轻松看懂字节码</div></a><a href="/jvm/how-jvm-run-zijiema-zhiling.html" class="nav-link next" aria-label="虚拟机是如何执行字节码指令的"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">虚拟机是如何执行字节码指令的<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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diff --git a/dist/jvm/zongjie.html b/dist/jvm/zongjie.html
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类加载器<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/zongjie.html#_6-4-双亲委派模型" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="6.4 双亲委派模型"><!---->6.4 双亲委派模型<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/zongjie.html#_6-5-模块化下的类加载器" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="6.5 模块化下的类加载器"><!---->6.5 模块化下的类加载器<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/zongjie.html#七、程序编译" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="七、程序编译"><!---->七、程序编译<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/zongjie.html#_7-1-编译器分类" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="7.1 编译器分类"><!---->7.1 编译器分类<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/zongjie.html#_7-2-解释器与编译器" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="7.2 解释器与编译器"><!---->7.2 解释器与编译器<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/zongjie.html#_7-3-分层编译" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="7.3 分层编译"><!---->7.3 分层编译<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/zongjie.html#_7-4-热点探测" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="7.4 热点探测"><!---->7.4 热点探测<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/zongjie.html#八、代码优化" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="八、代码优化"><!---->八、代码优化<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/zongjie.html#_8-1-方法内联" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="8.1 方法内联"><!---->8.1 方法内联<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/zongjie.html#_8-2-逃逸分析" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="8.2 逃逸分析"><!---->8.2 逃逸分析<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/zongjie.html#_8-3-公共子表达式消除" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="8.3 公共子表达式消除"><!---->8.3 公共子表达式消除<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/zongjie.html#_8-4-数组边界检查消除" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="8.4 数组边界检查消除"><!---->8.4 数组边界检查消除<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li></ul><!--]--></li></ul></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->JVM 核心知识点总结</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月27日</span><meta property="datePublished" content="2022-03-27T04:07:13.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><li class="category category1" role>JVM</li><meta property="articleSection" content="Java核心,JVM"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 43 分钟</span><meta property="timeRequired" content="PT43M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#一、基本概念" class="router-link-active router-link-exact-active toc-link level2">一、基本概念</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#_1-1-openjdk" class="router-link-active router-link-exact-active toc-link level3">1.1 OpenJDK</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#_1-2-oraclejdk" class="router-link-active router-link-exact-active toc-link level3">1.2 OracleJDK</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#_1-3-hotspot-vm" class="router-link-active router-link-exact-active toc-link level3">1.3 HotSpot VM</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#二、java-内存区域" class="router-link-active router-link-exact-active toc-link level2">二、Java 内存区域</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#_2-1-程序计数器" class="router-link-active router-link-exact-active toc-link level3">2.1 程序计数器</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#_2-2-java虚拟机栈" class="router-link-active router-link-exact-active toc-link level3">2.2 Java虚拟机栈</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#_2-3-本地方法栈" class="router-link-active router-link-exact-active toc-link level3">2.3 本地方法栈</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#_2-4-java堆" class="router-link-active router-link-exact-active toc-link level3">2.4 Java堆</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#_2-5-方法区" class="router-link-active router-link-exact-active toc-link level3">2.5 方法区</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#三、对象" class="router-link-active router-link-exact-active toc-link level2">三、对象</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#_3-1-对象的创建" class="router-link-active router-link-exact-active toc-link level3">3.1 对象的创建</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#_3-2-对象的内存布局" class="router-link-active router-link-exact-active toc-link level3">3.2 对象的内存布局</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#_3-3-对象的访问定位" class="router-link-active router-link-exact-active toc-link level3">3.3 对象的访问定位</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#四、垃圾收集算法" class="router-link-active router-link-exact-active toc-link level2">四、垃圾收集算法</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#_4-1-java-堆回收" class="router-link-active router-link-exact-active toc-link level3">4.1 Java 堆回收</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#_4-2-方法区回收" class="router-link-active router-link-exact-active toc-link level3">4.2 方法区回收</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#_4-3-垃圾收集算法" class="router-link-active router-link-exact-active toc-link level3">4.3 垃圾收集算法</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#五、经典垃圾收集器" class="router-link-active router-link-exact-active toc-link level2">五、经典垃圾收集器</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#_5-1-serial-收集器" class="router-link-active router-link-exact-active toc-link level3">5.1 Serial 收集器</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#_5-2-parnew-收集器" class="router-link-active router-link-exact-active toc-link level3">5.2 ParNew 收集器</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#_5-3-parallel-scavenge-收集器" class="router-link-active router-link-exact-active toc-link level3">5.3 Parallel Scavenge 收集器</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#_5-4-serial-old-收集器" class="router-link-active router-link-exact-active toc-link level3">5.4 Serial Old 收集器</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#_5-5-paralled-old-收集器" class="router-link-active router-link-exact-active toc-link level3">5.5 Paralled Old 收集器</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#_5-6-cms-收集器" class="router-link-active router-link-exact-active toc-link level3">5.6 CMS 收集器</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#_5-7-garbage-first-收集器" class="router-link-active router-link-exact-active toc-link level3">5.7 Garbage First 收集器</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#_5-8-内存分配原则" class="router-link-active router-link-exact-active toc-link level3">5.8 内存分配原则</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#六、虚拟机类加载机制" class="router-link-active router-link-exact-active toc-link level2">六、虚拟机类加载机制</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#_6-1-类加载时机" class="router-link-active router-link-exact-active toc-link level3">6.1 类加载时机</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#_6-2-类加载过程" class="router-link-active router-link-exact-active toc-link level3">6.2 类加载过程</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#_6-3-类加载器" class="router-link-active router-link-exact-active toc-link level3">6.3 类加载器</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#_6-4-双亲委派模型" class="router-link-active router-link-exact-active toc-link level3">6.4 双亲委派模型</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#_6-5-模块化下的类加载器" class="router-link-active router-link-exact-active toc-link level3">6.5 模块化下的类加载器</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#七、程序编译" class="router-link-active router-link-exact-active toc-link level2">七、程序编译</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#_7-1-编译器分类" class="router-link-active router-link-exact-active toc-link level3">7.1 编译器分类</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#_7-2-解释器与编译器" class="router-link-active router-link-exact-active toc-link level3">7.2 解释器与编译器</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#_7-3-分层编译" class="router-link-active router-link-exact-active toc-link level3">7.3 分层编译</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#_7-4-热点探测" class="router-link-active router-link-exact-active toc-link level3">7.4 热点探测</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#八、代码优化" class="router-link-active router-link-exact-active toc-link level2">八、代码优化</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#_8-1-方法内联" class="router-link-active router-link-exact-active toc-link level3">8.1 方法内联</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#_8-2-逃逸分析" class="router-link-active router-link-exact-active toc-link level3">8.2 逃逸分析</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#_8-3-公共子表达式消除" class="router-link-active router-link-exact-active toc-link level3">8.3 公共子表达式消除</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#_8-4-数组边界检查消除" class="router-link-active router-link-exact-active toc-link level3">8.4 数组边界检查消除</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="jvm-核心知识点总结" tabindex="-1"><a class="header-anchor" href="#jvm-核心知识点总结" aria-hidden="true">#</a> JVM 核心知识点总结</h1><h2 id="一、基本概念" tabindex="-1"><a class="header-anchor" href="#一、基本概念" aria-hidden="true">#</a> 一、基本概念</h2><h3 id="_1-1-openjdk" tabindex="-1"><a class="header-anchor" href="#_1-1-openjdk" aria-hidden="true">#</a> 1.1 OpenJDK</h3><p>自 1996 年 <code>JDK 1.0</code> 发布以来，Sun 公司在大版本上发行了 <code>JDK 1.1</code>、<code>JDK 1.2</code>、<code>JDK 1.3</code>、<code>JDK 1.4</code>、<code>JDK 5</code>，<code>JDK 6</code> ，这些版本的 JDK 都可以统称为 SunJDK 。之后在 2006 年的 JavaOne 大会上，Sun 公司宣布将 Java 开源，在随后的一年多里，它陆续将 JDK 的各个部分在 GPL v2（GNU General Public License，version 2）协议下开源，并建立了 OpenJDK 组织来对这些代码进行独立的管理，这就是 OpenJDK 的来源，此时的 OpenJDK 拥有当时 sunJDK 7 的几乎全部代码。</p><h3 id="_1-2-oraclejdk" tabindex="-1"><a class="header-anchor" href="#_1-2-oraclejdk" aria-hidden="true">#</a> 1.2 OracleJDK</h3><p>在 JDK 7 的开发期间，由于各种原因的影响 Sun 公司市值一路下跌，已无力推进 JDK 7 的开发，JDK 7 的发布一直被推迟。之后在 2009 年 Sun 公司被 Oracle 公司所收购，为解决 JDK 7 长期跳票的问题，Oracle 将 JDK 7 中大部分未能完成的项目推迟到 JDK 8 ，并于 2011 年发布了JDK 7，在这之后由 Oracle 公司正常发行的 JDK 版本就由 SunJDK 改称为 Oracle JDK。</p><p>在 2017 年 JDK 9 发布后，Oracle 公司宣布从此以后 JDK 将会在每年的 3 月和 9 月各发布一个大版本，即半年发行一个大版本，目的是为了避免众多功能被捆绑到一个 JDK 版本上而引发的无法交付的风险。</p><p>在 JDK 11 发布后，Oracle 同步调整了 JDK 的商业授权，宣布从 JDK 11 起将以前的商业特性全部开源给 OpenJDK ，这样 OpenJDK 11 和 OracleJDK 11 的代码和功能，在本质上就完全相同了。同时还宣布以后都会发行两个版本的 JDK ：</p><ul><li>一个是在 GPLv2 + CE 协议下由 Oracle 开源的 OpenJDK；</li><li>一个是在 OTN 协议下正常发行的 OracleJDK。</li></ul><p>两者共享大部分源码，在功能上几乎一致。唯一的区别是 Oracle OpenJDK 可以在开发、测试或者生产环境中使用，但只有半年的更新支持；而 OracleJDK 对个人免费，但在生产环境中商用收费，可以有三年时间的更新支持。</p><h3 id="_1-3-hotspot-vm" tabindex="-1"><a class="header-anchor" href="#_1-3-hotspot-vm" aria-hidden="true">#</a> 1.3 HotSpot VM</h3><p>它是 Sun/Oracle JDK 和 OpenJDK 中默认的虚拟机，也是目前使用最为广泛的虚拟机。最初由 Longview Technologies 公司设计发明，该公司在 1997 年被 Sun 公司收购，随后 Sun 公司在 2006 年开源 SunJDK 时也将 HotSpot 虚拟机一并进行了开源。之后 Oracle 收购 Sun 以后，建立了 HotRockit 项目，并将其收购的另外一家公司（BEA）的 JRockit 虚拟机中的优秀特性集成到 HotSpot 中。HotSpot 在这个过程里面移除掉永久代，并吸收了 JRockit 的 Java Mission Control 监控工具等功能。到 JDK 8 发行时，采用的就是集两者之长的 HotSpot VM 。</p><p>我们可以在自己的电脑上使用 <code>java -version</code> 来获得 JDK 的信息：</p><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code>C:<span class="token punctuation">\</span>Users<span class="token operator">&gt;</span> java -version
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class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.11 并发编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">2.12 JVM</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/jvm/what-is-jvm.html" class="nav-link sidebar-link sidebar-page" aria-label="JVM到底是什么？"><!---->JVM到底是什么？<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/how-run-java-code.html" class="nav-link sidebar-link sidebar-page" aria-label="JVM到底是如何运行Java代码的"><!---->JVM到底是如何运行Java代码的<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/class-load.html" class="nav-link sidebar-link sidebar-page" aria-label="类加载机制"><!---->类加载机制<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/class-file-jiegou.html" class="nav-link sidebar-link sidebar-page" aria-label="详解Java的类文件结构"><!---->详解Java的类文件结构<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/bytecode.html" class="nav-link sidebar-link sidebar-page" aria-label="从javap的角度轻松看懂字节码"><!---->从javap的角度轻松看懂字节码<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/zijiema-zhiling.html" class="nav-link sidebar-link sidebar-page" aria-label="字节码指令详解"><!---->字节码指令详解<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/how-jvm-run-zijiema-zhiling.html" class="nav-link sidebar-link sidebar-page" aria-label="虚拟机是如何执行字节码指令的"><!---->虚拟机是如何执行字节码指令的<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/hsdb.html" class="nav-link sidebar-link sidebar-page" aria-label="HSDB（Hotspot Debugger）"><!---->HSDB（Hotspot Debugger）<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/asm.html" class="nav-link sidebar-link sidebar-page" aria-label="史上最通俗易懂的ASM教程"><!---->史上最通俗易懂的ASM教程<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/compile-jdk.html" class="nav-link sidebar-link sidebar-page" aria-label="自己编译JDK"><!---->自己编译JDK<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/neicun-jiegou.html" class="nav-link sidebar-link sidebar-page" aria-label="深入理解JVM的内存结构"><!---->深入理解JVM的内存结构<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/whereis-the-object.html" class="nav-link sidebar-link sidebar-page" aria-label="Java 创建的对象到底放在哪"><!---->Java 创建的对象到底放在哪<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/gc.html" class="nav-link sidebar-link sidebar-page" aria-label="从头到尾说一次Java垃圾回收"><!---->从头到尾说一次Java垃圾回收<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/tujie-gc.html" class="nav-link sidebar-link sidebar-page" aria-label="图解Java的垃圾回收机制"><!---->图解Java的垃圾回收机制<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/problem-tools.html" class="nav-link sidebar-link sidebar-page" aria-label="Java问题诊断和排查工具"><!---->Java问题诊断和排查工具<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/jit.html" class="nav-link sidebar-link sidebar-page" aria-label="JIT原理解析及实践"><!---->JIT原理解析及实践<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/oom.html" class="nav-link sidebar-link sidebar-page" aria-label="内存溢出排查优化实战"><!---->内存溢出排查优化实战<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/jvm/cpu-percent-100.html" class="nav-link sidebar-link sidebar-page" aria-label="CPU 100% 排查优化实践"><!---->CPU 100% 排查优化实践<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/jvm/zongjie.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="JVM 核心知识点总结"><!---->JVM 核心知识点总结<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/zongjie.html#一、基本概念" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="一、基本概念"><!---->一、基本概念<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/zongjie.html#_1-1-openjdk" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="1.1 OpenJDK"><!---->1.1 OpenJDK<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/zongjie.html#_1-2-oraclejdk" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="1.2 OracleJDK"><!---->1.2 OracleJDK<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/zongjie.html#_1-3-hotspot-vm" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="1.3 HotSpot VM"><!---->1.3 HotSpot VM<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/zongjie.html#二、java-内存区域" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="二、Java 内存区域"><!---->二、Java 内存区域<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/zongjie.html#_2-1-程序计数器" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="2.1 程序计数器"><!---->2.1 程序计数器<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/zongjie.html#_2-2-java虚拟机栈" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="2.2 Java虚拟机栈"><!---->2.2 Java虚拟机栈<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/zongjie.html#_2-3-本地方法栈" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="2.3 本地方法栈"><!---->2.3 本地方法栈<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/zongjie.html#_2-4-java堆" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="2.4 Java堆"><!---->2.4 Java堆<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/zongjie.html#_2-5-方法区" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="2.5 方法区"><!---->2.5 方法区<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/zongjie.html#三、对象" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="三、对象"><!---->三、对象<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/zongjie.html#_3-1-对象的创建" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="3.1 对象的创建"><!---->3.1 对象的创建<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/zongjie.html#_3-2-对象的内存布局" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="3.2 对象的内存布局"><!---->3.2 对象的内存布局<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/zongjie.html#_3-3-对象的访问定位" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="3.3 对象的访问定位"><!---->3.3 对象的访问定位<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/zongjie.html#四、垃圾收集算法" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="四、垃圾收集算法"><!---->四、垃圾收集算法<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/zongjie.html#_4-1-java-堆回收" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="4.1 Java 堆回收"><!---->4.1 Java 堆回收<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/zongjie.html#_4-2-方法区回收" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="4.2 方法区回收"><!---->4.2 方法区回收<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/zongjie.html#_4-3-垃圾收集算法" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="4.3 垃圾收集算法"><!---->4.3 垃圾收集算法<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/zongjie.html#五、经典垃圾收集器" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="五、经典垃圾收集器"><!---->五、经典垃圾收集器<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/zongjie.html#_5-1-serial-收集器" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="5.1 Serial 收集器"><!---->5.1 Serial 收集器<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/zongjie.html#_5-2-parnew-收集器" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="5.2 ParNew 收集器"><!---->5.2 ParNew 收集器<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/zongjie.html#_5-3-parallel-scavenge-收集器" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="5.3 Parallel Scavenge 收集器"><!---->5.3 Parallel Scavenge 收集器<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/zongjie.html#_5-4-serial-old-收集器" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="5.4 Serial Old 收集器"><!---->5.4 Serial Old 收集器<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/zongjie.html#_5-5-paralled-old-收集器" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="5.5 Paralled Old 收集器"><!---->5.5 Paralled Old 收集器<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/zongjie.html#_5-6-cms-收集器" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="5.6 CMS 收集器"><!---->5.6 CMS 收集器<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/zongjie.html#_5-7-garbage-first-收集器" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="5.7 Garbage First 收集器"><!---->5.7 Garbage First 收集器<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/zongjie.html#_5-8-内存分配原则" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="5.8 内存分配原则"><!---->5.8 内存分配原则<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/zongjie.html#六、虚拟机类加载机制" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="六、虚拟机类加载机制"><!---->六、虚拟机类加载机制<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/zongjie.html#_6-1-类加载时机" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="6.1 类加载时机"><!---->6.1 类加载时机<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/zongjie.html#_6-2-类加载过程" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="6.2 类加载过程"><!---->6.2 类加载过程<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/zongjie.html#_6-3-类加载器" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="6.3 类加载器"><!---->6.3 类加载器<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/zongjie.html#_6-4-双亲委派模型" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="6.4 双亲委派模型"><!---->6.4 双亲委派模型<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/zongjie.html#_6-5-模块化下的类加载器" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="6.5 模块化下的类加载器"><!---->6.5 模块化下的类加载器<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/zongjie.html#七、程序编译" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="七、程序编译"><!---->七、程序编译<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/zongjie.html#_7-1-编译器分类" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="7.1 编译器分类"><!---->7.1 编译器分类<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/zongjie.html#_7-2-解释器与编译器" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="7.2 解释器与编译器"><!---->7.2 解释器与编译器<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/zongjie.html#_7-3-分层编译" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="7.3 分层编译"><!---->7.3 分层编译<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/zongjie.html#_7-4-热点探测" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="7.4 热点探测"><!---->7.4 热点探测<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/zongjie.html#八、代码优化" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="八、代码优化"><!---->八、代码优化<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/zongjie.html#_8-1-方法内联" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="8.1 方法内联"><!---->8.1 方法内联<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/zongjie.html#_8-2-逃逸分析" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="8.2 逃逸分析"><!---->8.2 逃逸分析<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/zongjie.html#_8-3-公共子表达式消除" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="8.3 公共子表达式消除"><!---->8.3 公共子表达式消除<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/jvm/zongjie.html#_8-4-数组边界检查消除" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="8.4 数组边界检查消除"><!---->8.4 数组边界检查消除<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li></ul><!--]--></li></ul></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->JVM 核心知识点总结</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月27日</span><meta property="datePublished" content="2022-03-27T04:07:13.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><li class="category category1" role>JVM</li><meta property="articleSection" content="Java核心,JVM"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 43 分钟</span><meta property="timeRequired" content="PT43M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#一、基本概念" class="router-link-active router-link-exact-active toc-link level2">一、基本概念</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#_1-1-openjdk" class="router-link-active router-link-exact-active toc-link level3">1.1 OpenJDK</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#_1-2-oraclejdk" class="router-link-active router-link-exact-active toc-link level3">1.2 OracleJDK</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#_1-3-hotspot-vm" class="router-link-active router-link-exact-active toc-link level3">1.3 HotSpot VM</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#二、java-内存区域" class="router-link-active router-link-exact-active toc-link level2">二、Java 内存区域</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#_2-1-程序计数器" class="router-link-active router-link-exact-active toc-link level3">2.1 程序计数器</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#_2-2-java虚拟机栈" class="router-link-active router-link-exact-active toc-link level3">2.2 Java虚拟机栈</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#_2-3-本地方法栈" class="router-link-active router-link-exact-active toc-link level3">2.3 本地方法栈</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#_2-4-java堆" class="router-link-active router-link-exact-active toc-link level3">2.4 Java堆</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#_2-5-方法区" class="router-link-active router-link-exact-active toc-link level3">2.5 方法区</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#三、对象" class="router-link-active router-link-exact-active toc-link level2">三、对象</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#_3-1-对象的创建" class="router-link-active router-link-exact-active toc-link level3">3.1 对象的创建</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#_3-2-对象的内存布局" class="router-link-active router-link-exact-active toc-link level3">3.2 对象的内存布局</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#_3-3-对象的访问定位" class="router-link-active router-link-exact-active toc-link level3">3.3 对象的访问定位</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#四、垃圾收集算法" class="router-link-active router-link-exact-active toc-link level2">四、垃圾收集算法</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#_4-1-java-堆回收" class="router-link-active router-link-exact-active toc-link level3">4.1 Java 堆回收</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#_4-2-方法区回收" class="router-link-active router-link-exact-active toc-link level3">4.2 方法区回收</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#_4-3-垃圾收集算法" class="router-link-active router-link-exact-active toc-link level3">4.3 垃圾收集算法</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#五、经典垃圾收集器" class="router-link-active router-link-exact-active toc-link level2">五、经典垃圾收集器</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#_5-1-serial-收集器" class="router-link-active router-link-exact-active toc-link level3">5.1 Serial 收集器</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#_5-2-parnew-收集器" class="router-link-active router-link-exact-active toc-link level3">5.2 ParNew 收集器</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#_5-3-parallel-scavenge-收集器" class="router-link-active router-link-exact-active toc-link level3">5.3 Parallel Scavenge 收集器</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#_5-4-serial-old-收集器" class="router-link-active router-link-exact-active toc-link level3">5.4 Serial Old 收集器</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#_5-5-paralled-old-收集器" class="router-link-active router-link-exact-active toc-link level3">5.5 Paralled Old 收集器</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#_5-6-cms-收集器" class="router-link-active router-link-exact-active toc-link level3">5.6 CMS 收集器</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#_5-7-garbage-first-收集器" class="router-link-active router-link-exact-active toc-link level3">5.7 Garbage First 收集器</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#_5-8-内存分配原则" class="router-link-active router-link-exact-active toc-link level3">5.8 内存分配原则</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#六、虚拟机类加载机制" class="router-link-active router-link-exact-active toc-link level2">六、虚拟机类加载机制</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#_6-1-类加载时机" class="router-link-active router-link-exact-active toc-link level3">6.1 类加载时机</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#_6-2-类加载过程" class="router-link-active router-link-exact-active toc-link level3">6.2 类加载过程</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#_6-3-类加载器" class="router-link-active router-link-exact-active toc-link level3">6.3 类加载器</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#_6-4-双亲委派模型" class="router-link-active router-link-exact-active toc-link level3">6.4 双亲委派模型</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#_6-5-模块化下的类加载器" class="router-link-active router-link-exact-active toc-link level3">6.5 模块化下的类加载器</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#七、程序编译" class="router-link-active router-link-exact-active toc-link level2">七、程序编译</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#_7-1-编译器分类" class="router-link-active router-link-exact-active toc-link level3">7.1 编译器分类</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#_7-2-解释器与编译器" class="router-link-active router-link-exact-active toc-link level3">7.2 解释器与编译器</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#_7-3-分层编译" class="router-link-active router-link-exact-active toc-link level3">7.3 分层编译</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#_7-4-热点探测" class="router-link-active router-link-exact-active toc-link level3">7.4 热点探测</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#八、代码优化" class="router-link-active router-link-exact-active toc-link level2">八、代码优化</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#_8-1-方法内联" class="router-link-active router-link-exact-active toc-link level3">8.1 方法内联</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#_8-2-逃逸分析" class="router-link-active router-link-exact-active toc-link level3">8.2 逃逸分析</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#_8-3-公共子表达式消除" class="router-link-active router-link-exact-active toc-link level3">8.3 公共子表达式消除</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/jvm/zongjie.html#_8-4-数组边界检查消除" class="router-link-active router-link-exact-active toc-link level3">8.4 数组边界检查消除</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="jvm-核心知识点总结" tabindex="-1"><a class="header-anchor" href="#jvm-核心知识点总结" aria-hidden="true">#</a> JVM 核心知识点总结</h1><h2 id="一、基本概念" tabindex="-1"><a class="header-anchor" href="#一、基本概念" aria-hidden="true">#</a> 一、基本概念</h2><h3 id="_1-1-openjdk" tabindex="-1"><a class="header-anchor" href="#_1-1-openjdk" aria-hidden="true">#</a> 1.1 OpenJDK</h3><p>自 1996 年 <code>JDK 1.0</code> 发布以来，Sun 公司在大版本上发行了 <code>JDK 1.1</code>、<code>JDK 1.2</code>、<code>JDK 1.3</code>、<code>JDK 1.4</code>、<code>JDK 5</code>，<code>JDK 6</code> ，这些版本的 JDK 都可以统称为 SunJDK 。之后在 2006 年的 JavaOne 大会上，Sun 公司宣布将 Java 开源，在随后的一年多里，它陆续将 JDK 的各个部分在 GPL v2（GNU General Public License，version 2）协议下开源，并建立了 OpenJDK 组织来对这些代码进行独立的管理，这就是 OpenJDK 的来源，此时的 OpenJDK 拥有当时 sunJDK 7 的几乎全部代码。</p><h3 id="_1-2-oraclejdk" tabindex="-1"><a class="header-anchor" href="#_1-2-oraclejdk" aria-hidden="true">#</a> 1.2 OracleJDK</h3><p>在 JDK 7 的开发期间，由于各种原因的影响 Sun 公司市值一路下跌，已无力推进 JDK 7 的开发，JDK 7 的发布一直被推迟。之后在 2009 年 Sun 公司被 Oracle 公司所收购，为解决 JDK 7 长期跳票的问题，Oracle 将 JDK 7 中大部分未能完成的项目推迟到 JDK 8 ，并于 2011 年发布了JDK 7，在这之后由 Oracle 公司正常发行的 JDK 版本就由 SunJDK 改称为 Oracle JDK。</p><p>在 2017 年 JDK 9 发布后，Oracle 公司宣布从此以后 JDK 将会在每年的 3 月和 9 月各发布一个大版本，即半年发行一个大版本，目的是为了避免众多功能被捆绑到一个 JDK 版本上而引发的无法交付的风险。</p><p>在 JDK 11 发布后，Oracle 同步调整了 JDK 的商业授权，宣布从 JDK 11 起将以前的商业特性全部开源给 OpenJDK ，这样 OpenJDK 11 和 OracleJDK 11 的代码和功能，在本质上就完全相同了。同时还宣布以后都会发行两个版本的 JDK ：</p><ul><li>一个是在 GPLv2 + CE 协议下由 Oracle 开源的 OpenJDK；</li><li>一个是在 OTN 协议下正常发行的 OracleJDK。</li></ul><p>两者共享大部分源码，在功能上几乎一致。唯一的区别是 Oracle OpenJDK 可以在开发、测试或者生产环境中使用，但只有半年的更新支持；而 OracleJDK 对个人免费，但在生产环境中商用收费，可以有三年时间的更新支持。</p><h3 id="_1-3-hotspot-vm" tabindex="-1"><a class="header-anchor" href="#_1-3-hotspot-vm" aria-hidden="true">#</a> 1.3 HotSpot VM</h3><p>它是 Sun/Oracle JDK 和 OpenJDK 中默认的虚拟机，也是目前使用最为广泛的虚拟机。最初由 Longview Technologies 公司设计发明，该公司在 1997 年被 Sun 公司收购，随后 Sun 公司在 2006 年开源 SunJDK 时也将 HotSpot 虚拟机一并进行了开源。之后 Oracle 收购 Sun 以后，建立了 HotRockit 项目，并将其收购的另外一家公司（BEA）的 JRockit 虚拟机中的优秀特性集成到 HotSpot 中。HotSpot 在这个过程里面移除掉永久代，并吸收了 JRockit 的 Java Mission Control 监控工具等功能。到 JDK 8 发行时，采用的就是集两者之长的 HotSpot VM 。</p><p>我们可以在自己的电脑上使用 <code>java -version</code> 来获得 JDK 的信息：</p><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code>C:<span class="token punctuation">\</span>Users<span class="token operator">&gt;</span> java -version
 java version <span class="token string">&quot;1.8.0_171&quot;</span>   <span class="token comment"># 如果是openJDK, 则这里会显示：openjdk version</span>
 Java<span class="token punctuation">(</span>TM<span class="token punctuation">)</span> SE Runtime Environment <span class="token punctuation">(</span>build <span class="token number">1.8</span>.0_171-b11<span class="token punctuation">)</span>
 Java HotSpot<span class="token punctuation">(</span>TM<span class="token punctuation">)</span> <span class="token number">64</span>-Bit Server VM <span class="token punctuation">(</span>build <span class="token number">25.171</span>-b11, mixed mode<span class="token punctuation">)</span> <span class="token comment"># 使用的是HotSpot虚拟机，默认为服务端模式</span>
@@ -68,6 +68,6 @@ objB <span class="token operator">=</span> <span class="token keyword">null</spa
     <span class="token keyword">return</span> sb<span class="token punctuation">.</span><span class="token function">toString</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// 没有发生方法逃逸</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>如果能证明一个对象不会逃逸到方法或线程之外，或者逃逸程度比较低（只逃逸出方法而不会逃逸出线程），则可以为这个对象实例采取不同程序的优化：</p><ul><li><strong>栈上分配 (Stack Allocations)</strong>：如果一个对象不会逃逸到线程外，那么将会在栈上分配内存来创建这个对象，而不是 Java 堆上，此时对象所占用的内存空间就会随着栈帧的出栈而销毁，从而可以减轻垃圾回收的压力。</li><li><strong>标量替换 (Scalar Replacement)</strong>：如果一个数据已经无法再分解成为更小的数据类型，那么这些数据就称为标量（如 int、long 等数值类型及 reference 类型等）；反之，如果一个数据可以继续分解，那它就被称为聚合量（如对象）。如果一个对象不会逃逸外方法外，那么就可以将其改为直接创建若干个被这个方法使用的成员变量来替代，从而减少内存占用。</li><li><strong>同步消除 (Synchronization Elimination)</strong>：如果一个变量不会逃逸出线程，那么对这个变量实施的同步措施就可以消除掉。</li></ul><h3 id="_8-3-公共子表达式消除" tabindex="-1"><a class="header-anchor" href="#_8-3-公共子表达式消除" aria-hidden="true">#</a> 8.3 公共子表达式消除</h3><p>如果一个表达式 E 之前已经被计算过了，并且从先前的计算到现在 E 中所有变量的值都没有发生过变化，那么 E 这次的出现就称为公共子表达式。对于这种表达式，无需再重新进行计算，只需要直接使用前面的计算结果即可。</p><h3 id="_8-4-数组边界检查消除" tabindex="-1"><a class="header-anchor" href="#_8-4-数组边界检查消除" aria-hidden="true">#</a> 8.4 数组边界检查消除</h3><p>对于虚拟机执行子系统来说，每次数组元素的读写都带有一次隐含的上下文检查以避免访问越界。如果数组的访问发生在循环之中，并且使用循环变量来访问数据，即循环变量的取值永远在 [0，list.length) 之间，那么此时就可以消除整个循环的数据边界检查，从而避免多次无用的判断。</p><blockquote><ul><li>原文链接：<a href="https://github.com/heibaiying/Full-Stack-Notes" target="_blank" rel="noopener noreferrer">https://github.com/heibaiying/Full-Stack-Notes<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" 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class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/springboot/macos-codingmore-run.html" class="nav-link sidebar-link sidebar-page" aria-label="macOS下如何运行编程喵源码"><!---->macOS下如何运行编程喵源码<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/springboot/windows-codingmore-run.html" class="nav-link sidebar-link sidebar-page" aria-label="Windows下如何运行编程喵源码"><!---->Windows下如何运行编程喵源码<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.5 辅助工具</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.6 开源轮子</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.7 分布式</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.8 消息队列</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Spring Boot 整合 MyBatis-Plus AutoGenerator 生成编程喵项目骨架代码</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" 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7 分钟</span><meta property="timeRequired" content="PT7M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/kaiyuan/auto-generator.html#导入-sql-文件" class="router-link-active router-link-exact-active toc-link level3">导入 SQL 文件</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/kaiyuan/auto-generator.html#先体验-mybatis-generator" class="router-link-active router-link-exact-active toc-link level3">先体验 Mybatis Generator</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/kaiyuan/auto-generator.html#再体验-mybatis-plus-的-autogenerator" class="router-link-active router-link-exact-active toc-link level3">再体验 MyBatis-Plus 的 AutoGenerator</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/kaiyuan/auto-generator.html#源码地址" class="router-link-active router-link-exact-active toc-link level3">源码地址：</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><p>作为一名 Java 后端开发，日常工作中免不了要生成数据库表对应的持久化对象 PO，操作数据库的接口 DAO，以及 CRUD 的 XML，也就是 mapper。</p><p>Mybatis Generator 是 MyBatis 官方提供的一个代码生成工具，完全可以胜任这个工作，不过最近在开发“编程喵🐱”开源网站的时候试用了一下 MyBatis-Plus 官方提供 AutoGenerator，发现配置更简单，开发效率更高！于是就来给小伙伴们安利一波。</p><p>让我们来通过一个 gif 感受一下 AutoGenerator 的强大。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/kaiyuan/auto-generator-1.gif" alt=""></p><h3 id="导入-sql-文件" tabindex="-1"><a class="header-anchor" href="#导入-sql-文件" aria-hidden="true">#</a> 导入 SQL 文件</h3><p>编程喵项目的 SQL 文件我已经同步到本教程所在的源码当中。</p><blockquote><p>路径：<a href="https://github.com/itwanger/codingmore-learning/tree/main/codingmore-autogenerator" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/codingmore-learning/tree/main/codingmore-autogenerator<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>可以通过 GitHub 桌面版从 GitHub 上下载本教程专属的项目 codingmore-autogenerator 到本地，SQL 文件的位置参照下图。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/kaiyuan/auto-generator-47997c23-cb65-4801-954c-0ec611b764ad.png" alt=""></p><p>编程喵使用的 MySQL 版本是 8.0，可以在链接上 MySQL 后使用 <code>select version();</code> 命令查询版本。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/kaiyuan/auto-generator-ea5bbe50-ba28-4056-a81f-a68651a58391.png" alt=""></p><p>打开 Navicat，把 SQL 文件导入到本地数据库，</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/kaiyuan/auto-generator-d523792f-2d55-4485-b64d-b4763ecd7b77.png" alt=""></p><p>关闭链接，重新打开就可以看到导入后的数据库 codingmore，里面一共 27 张表。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/kaiyuan/auto-generator-3cda9cb7-dda5-4aca-9cea-cc400768b921.png" alt=""></p><h3 id="先体验-mybatis-generator" tabindex="-1"><a class="header-anchor" href="#先体验-mybatis-generator" aria-hidden="true">#</a> 先体验 Mybatis Generator</h3><p>第一步，在 pom.xml 文件中添加 MySQL+MyBatis 的依赖（Mybatis Generator 的前置条件）。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
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class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Spring Boot 整合 MyBatis-Plus AutoGenerator 生成编程喵项目骨架代码</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" 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1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag1" role>Spring Boot</li></ul><meta property="keywords" content="Spring Boot"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 7 分钟</span><meta property="timeRequired" content="PT7M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/kaiyuan/auto-generator.html#导入-sql-文件" class="router-link-active router-link-exact-active toc-link level2">导入 SQL 文件</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/kaiyuan/auto-generator.html#先体验-mybatis-generator" class="router-link-active router-link-exact-active toc-link level2">先体验 Mybatis Generator</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/kaiyuan/auto-generator.html#再体验-mybatis-plus-的-autogenerator" class="router-link-active router-link-exact-active toc-link level2">再体验 MyBatis-Plus 的 AutoGenerator</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/kaiyuan/auto-generator.html#源码地址" class="router-link-active router-link-exact-active toc-link level2">源码地址：</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><p>作为一名 Java 后端开发，日常工作中免不了要生成数据库表对应的持久化对象 PO，操作数据库的接口 DAO，以及 CRUD 的 XML，也就是 mapper。</p><p>Mybatis Generator 是 MyBatis 官方提供的一个代码生成工具，完全可以胜任这个工作，不过最近在开发“编程喵🐱”开源网站的时候试用了一下 MyBatis-Plus 官方提供 AutoGenerator，发现配置更简单，开发效率更高！于是就来给小伙伴们安利一波。</p><p>让我们来通过一个 gif 感受一下 AutoGenerator 的强大。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/kaiyuan/auto-generator-1.gif" alt=""></p><h2 id="导入-sql-文件" tabindex="-1"><a class="header-anchor" href="#导入-sql-文件" aria-hidden="true">#</a> 导入 SQL 文件</h2><p>编程喵项目的 SQL 文件我已经同步到本教程所在的源码当中。</p><blockquote><p>路径：<a href="https://github.com/itwanger/codingmore-learning/tree/main/codingmore-autogenerator" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/codingmore-learning/tree/main/codingmore-autogenerator<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>可以通过 GitHub 桌面版从 GitHub 上下载本教程专属的项目 codingmore-autogenerator 到本地，SQL 文件的位置参照下图。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/kaiyuan/auto-generator-47997c23-cb65-4801-954c-0ec611b764ad.png" alt=""></p><p>编程喵使用的 MySQL 版本是 8.0，可以在链接上 MySQL 后使用 <code>select version();</code> 命令查询版本。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/kaiyuan/auto-generator-ea5bbe50-ba28-4056-a81f-a68651a58391.png" alt=""></p><p>打开 Navicat，把 SQL 文件导入到本地数据库，</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/kaiyuan/auto-generator-d523792f-2d55-4485-b64d-b4763ecd7b77.png" alt=""></p><p>关闭链接，重新打开就可以看到导入后的数据库 codingmore，里面一共 27 张表。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/kaiyuan/auto-generator-3cda9cb7-dda5-4aca-9cea-cc400768b921.png" alt=""></p><h2 id="先体验-mybatis-generator" tabindex="-1"><a class="header-anchor" href="#先体验-mybatis-generator" aria-hidden="true">#</a> 先体验 Mybatis Generator</h2><p>第一步，在 pom.xml 文件中添加 MySQL+MyBatis 的依赖（Mybatis Generator 的前置条件）。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
     &lt;groupId&gt;org.mybatis.spring.boot&lt;/groupId&gt;
     &lt;artifactId&gt;mybatis-spring-boot-starter&lt;/artifactId&gt;
     &lt;version&gt;2.2.2&lt;/version&gt;
@@ -128,7 +128,7 @@
         &lt;/table&gt;
     &lt;/context&gt;
 &lt;/generatorConfiguration&gt;
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><ul><li>配置文件至少得包含一个context</li><li>commentGenerator 用来配置生成的注释</li><li>jdbcConnection 用来链接数据库</li><li>javaTypeResolver 配置 JDBC 与 Java 的类型转换规则</li><li>javaModelGenerator 配置 po 生成的包路径和项目路径</li><li>sqlMapGenerator 配置 mapper.xml 文件生成的目录</li><li>javaClientGenerator 配置 mapper.java 文件生成的目录</li><li>一个 table 对应一张表，如果想同时生成多张表，需要配置多个 table</li></ul><p>更多配置信息可以参照下面这篇文章：</p><blockquote><p><a href="https://juejin.cn/post/6844903982582743048" target="_blank" rel="noopener noreferrer">https://juejin.cn/post/6844903982582743048<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>到此为止，mybatis-generator-maven-plugin 就算是配置完成了，完整内容如下图所示：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/kaiyuan/auto-generator-c09c7dcd-ab4e-437b-a512-a9e0bf1f533c.png" alt=""></p><p>配置完成后可以双击运行 Maven 的插件 Mybatis Generator，没有问题的话，可以看到生成后的文件。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/kaiyuan/auto-generator-843487f6-5823-4291-b6c3-b4f69b9bba51.png" alt=""></p><h3 id="再体验-mybatis-plus-的-autogenerator" tabindex="-1"><a class="header-anchor" href="#再体验-mybatis-plus-的-autogenerator" aria-hidden="true">#</a> 再体验 MyBatis-Plus 的 AutoGenerator</h3><p>MyBatis-Plus（简写 MP）是 MyBatis 的增强工具，官方宣称 MP 和 MyBatis 的关系就好像魂斗罗中的 1P 和 2P，可谓好基友，天下走。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/kaiyuan/auto-generator-7.png" alt=""></p><p>AutoGenerator 是 MyBatis-Plus 推出的代码生成器，可以快速生成 Entity、Mapper、Mapper XML、Service、Controller 等各个模块的代码，比 Mybatis Generator 更强大，开发效率更高。</p><p>通过前面的体验，想必大家确实感觉到了 Mybatis Generator 的繁琐，接下来，我们来体验一下 AutoGenerator，对比过后，大家心里就有答案了。</p><p>第一步，在 pom.xml 文件中添加 AutoGenerator 的依赖。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><ul><li>配置文件至少得包含一个context</li><li>commentGenerator 用来配置生成的注释</li><li>jdbcConnection 用来链接数据库</li><li>javaTypeResolver 配置 JDBC 与 Java 的类型转换规则</li><li>javaModelGenerator 配置 po 生成的包路径和项目路径</li><li>sqlMapGenerator 配置 mapper.xml 文件生成的目录</li><li>javaClientGenerator 配置 mapper.java 文件生成的目录</li><li>一个 table 对应一张表，如果想同时生成多张表，需要配置多个 table</li></ul><p>更多配置信息可以参照下面这篇文章：</p><blockquote><p><a href="https://juejin.cn/post/6844903982582743048" target="_blank" rel="noopener noreferrer">https://juejin.cn/post/6844903982582743048<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>到此为止，mybatis-generator-maven-plugin 就算是配置完成了，完整内容如下图所示：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/kaiyuan/auto-generator-c09c7dcd-ab4e-437b-a512-a9e0bf1f533c.png" alt=""></p><p>配置完成后可以双击运行 Maven 的插件 Mybatis Generator，没有问题的话，可以看到生成后的文件。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/kaiyuan/auto-generator-843487f6-5823-4291-b6c3-b4f69b9bba51.png" alt=""></p><h2 id="再体验-mybatis-plus-的-autogenerator" tabindex="-1"><a class="header-anchor" href="#再体验-mybatis-plus-的-autogenerator" aria-hidden="true">#</a> 再体验 MyBatis-Plus 的 AutoGenerator</h2><p>MyBatis-Plus（简写 MP）是 MyBatis 的增强工具，官方宣称 MP 和 MyBatis 的关系就好像魂斗罗中的 1P 和 2P，可谓好基友，天下走。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/kaiyuan/auto-generator-7.png" alt=""></p><p>AutoGenerator 是 MyBatis-Plus 推出的代码生成器，可以快速生成 Entity、Mapper、Mapper XML、Service、Controller 等各个模块的代码，比 Mybatis Generator 更强大，开发效率更高。</p><p>通过前面的体验，想必大家确实感觉到了 Mybatis Generator 的繁琐，接下来，我们来体验一下 AutoGenerator，对比过后，大家心里就有答案了。</p><p>第一步，在 pom.xml 文件中添加 AutoGenerator 的依赖。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
     &lt;groupId&gt;com.baomidou&lt;/groupId&gt;
     &lt;artifactId&gt;mybatis-plus-generator&lt;/artifactId&gt;
     &lt;version&gt;3.4.1&lt;/version&gt;
@@ -179,7 +179,7 @@ mpg<span class="token punctuation">.</span><span class="token function">setDataS
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>第五步，配置包。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token comment">// 包配置</span>
 <span class="token class-name">PackageConfig</span> pc <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">PackageConfig</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 pc<span class="token punctuation">.</span><span class="token function">setParent</span><span class="token punctuation">(</span><span class="token string">&quot;top.codingmore.mpg&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>更多配置项可以到官方查看：</p><blockquote><p><a href="https://baomidou.com/pages/061573/" target="_blank" rel="noopener noreferrer">https://baomidou.com/pages/061573/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>完整代码如下所示：</p><hr><p>更多内容，只针对《Java 程序员进阶之路》星球用户开放，需要的小伙伴可以<a href="/kaiyuan/docs/zhishixingqiu/" class="">戳链接🔗</a>加入我们的星球，一起学习，一起卷。。<strong>编程喵</strong>🐱是一个 Spring Boot+Vue 的前后端分离项目，融合了市面上绝大多数流行的技术要点。通过学习实战项目，你可以将所学的知识通过实践进行检验、你可以拓宽自己的技术边界，你可以掌握一个真正的实战项目是如何从 0 到 1 的。</p><hr><h3 id="源码地址" tabindex="-1"><a class="header-anchor" href="#源码地址" aria-hidden="true">#</a> 源码地址：</h3><blockquote><ul><li>编程喵：<a href="https://github.com/itwanger/coding-more" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/coding-more<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li>codingmore-autogenerator：<a href="https://github.com/itwanger/codingmore-learning/tree/main/codingmore-autogenerator" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/codingmore-learning<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul></blockquote><hr><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a 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+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>更多配置项可以到官方查看：</p><blockquote><p><a href="https://baomidou.com/pages/061573/" target="_blank" rel="noopener noreferrer">https://baomidou.com/pages/061573/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>完整代码如下所示：</p><hr><p>更多内容，只针对《Java 程序员进阶之路》星球用户开放，需要的小伙伴可以<a href="https://tobebetterjavaer.com/zhishixingqiu/" target="_blank" rel="noopener noreferrer">戳链接🔗<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>加入我们的星球，一起学习，一起卷。。<strong>编程喵</strong>🐱是一个 Spring Boot+Vue 的前后端分离项目，融合了市面上绝大多数流行的技术要点。通过学习实战项目，你可以将所学的知识通过实践进行检验、你可以拓宽自己的技术边界，你可以掌握一个真正的实战项目是如何从 0 到 1 的。</p><hr><h2 id="源码地址" tabindex="-1"><a class="header-anchor" href="#源码地址" aria-hidden="true">#</a> 源码地址：</h2><blockquote><ul><li>编程喵：<a href="https://github.com/itwanger/coding-more" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/coding-more<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li>codingmore-autogenerator：<a href="https://github.com/itwanger/codingmore-learning/tree/main/codingmore-autogenerator" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/codingmore-learning<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul></blockquote><hr><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/kaiyuan/auto-generator.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 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71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/6/10 下午7:28:25</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/springboot/springtask.html" class="nav-link prev" aria-label="整合SpringTask"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->整合SpringTask</div></a><a href="/springboot/macos-codingmore-run.html" class="nav-link next" aria-label="macOS下如何运行编程喵源码"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">macOS下如何运行编程喵源码<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer 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pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 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class="theme-hope-content"><p>精选 Github 和 Gitee 上优质的 Java 开源项目，希望能够帮助到你。</p><p>欢迎大家在 <a href="https://github.com/CodingDocs/awesome-java/issues" target="_blank" rel="noopener noreferrer">issues 区<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>推荐自己认可的 Java 开源项目，让我们共同维护一个优质的 Java 开源项目精选集！</p><ul><li>Github 地址：<a href="https://github.com/CodingDocs/awesome-java" target="_blank" rel="noopener noreferrer">https://github.com/CodingDocs/awesome-java<span><svg class="external-link-icon" 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18.547z"></path></svg><ul class="categories-wrapper"><li class="category category5" role>Java企业级开发</li><meta property="articleSection" content="Java企业级开发"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag1" role>辅助工具/轮子</li></ul><meta property="keywords" content="辅助工具/轮子"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 4 分钟</span><meta property="timeRequired" content="PT4M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/kaiyuan/yuneban-wangyiyunyinyue.html#一、云-e-办" class="router-link-active router-link-exact-active toc-link level3">一、云 E 办</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/kaiyuan/yuneban-wangyiyunyinyue.html#二、仿网易云音乐的小网站" class="router-link-active router-link-exact-active toc-link level3">二、仿网易云音乐的小网站</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="云音乐" tabindex="-1"><a class="header-anchor" href="#云音乐" aria-hidden="true">#</a> 云音乐</h1><p>大家好，我是二哥呀！</p><p>前段时间，有个读者私信我说，<strong>刚学完 Spring Boot，想找点练手项目，准备找实习了。</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/kaiyuan/yuneban-wangyiyunyinyue-01.png" alt=""></p><p>二哥这么贴心，对于读者的请求，一向是有求必应，有问必答。那自然得花心思去淘 2 个像样的 Java 练手项目出来了，关键是还要基础，不能太难😆。</p><p>我之前有给大家推荐过 GitHub 上的 vhr、mall 和 miaosha，那这次想换个思路，到 B 站上淘一淘如何呢？</p><p>果真，还真让二哥找到了！小破站，YYDS！</p><h3 id="一、云-e-办" tabindex="-1"><a class="header-anchor" href="#一、云-e-办" aria-hidden="true">#</a> 一、云 E 办</h3><p>这是一个带大家从 0 搭建一个 Spring Boot+ Vue 的前后端分离的 Java 项目，前 P71 讲前端，P72 到 P131 讲后端。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/kaiyuan/yuneban-wangyiyunyinyue-02.png" alt=""></p><p>前端涉及到的技术有 Vue 全家桶、ElementUI；后端涉及到的技术有 Spring Boot、SpringMVC、MyBatisPlus、SpringSecurity、Swagger、Redis、EasyPOI、RabbitMQ、FasfDFS 等等。</p><p>视频整体上是不错的，up 的声音也很清晰，听起来很舒服。</p><p>为了验证 up 是不是一家培训机构，顺带替大家踩踩坑。我按照要求加了小助理的微信：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/kaiyuan/yuneban-wangyiyunyinyue-03.png" alt=""></p><p>加好友时一看头像，和平常偷偷摸摸混进群的广告党差不多，哈哈哈。</p><p>通过好友后，再去一查「乐字节」这个关键字，果然是一家培训机构，不过视频既然公开了出来，并且质量也说得过去，那果断学习一波也是很舒服的。</p><p>有时候，培训机构公开出来的视频课可能要好过付费小几万的付费视频课，毕竟拿出来的东西不能太水，否则会砸了自己招牌。</p><p>况且，二哥深入虎穴这一波也替大家踩过坑了，源码和课件都拿到了，直接在公众号后台回复关键字「<strong>B站</strong>」就可以拉取到了，不用再去加小助理微信了，大家可以放心食用。</p><p>怎么样，二哥这波安全拦截做得漂亮吧？</p><h3 id="二、仿网易云音乐的小网站" tabindex="-1"><a class="header-anchor" href="#二、仿网易云音乐的小网站" aria-hidden="true">#</a> 二、仿网易云音乐的小网站</h3><p>这是读者提供的一个前后端分离项目，问我项目怎么样，我点开去一看，这不一个号主朋友的嘛。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/kaiyuan/yuneban-wangyiyunyinyue-04.png" alt=""></p><p>网站的客户端和管理端使用 VUE 框架来实现的，服务端使用 Spring Boot + MyBatis 来实现，数据库使用了 MySQL。建议至少 1.5 倍速食用。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/kaiyuan/yuneban-wangyiyunyinyue-05.png" alt=""></p><p>前后端整体的项目结构也挺清晰的，这是后端的。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>├── avatorImages // 用户头像
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clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->云音乐</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 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458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag1" role>辅助工具/轮子</li></ul><meta property="keywords" content="辅助工具/轮子"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 4 分钟</span><meta property="timeRequired" content="PT4M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/kaiyuan/yuneban-wangyiyunyinyue.html#一、云-e-办" class="router-link-active router-link-exact-active toc-link level3">一、云 E 办</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/kaiyuan/yuneban-wangyiyunyinyue.html#二、仿网易云音乐的小网站" class="router-link-active router-link-exact-active toc-link level3">二、仿网易云音乐的小网站</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="云音乐" tabindex="-1"><a class="header-anchor" href="#云音乐" aria-hidden="true">#</a> 云音乐</h1><p>大家好，我是二哥呀！</p><p>前段时间，有个读者私信我说，<strong>刚学完 Spring Boot，想找点练手项目，准备找实习了。</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/kaiyuan/yuneban-wangyiyunyinyue-01.png" alt=""></p><p>二哥这么贴心，对于读者的请求，一向是有求必应，有问必答。那自然得花心思去淘 2 个像样的 Java 练手项目出来了，关键是还要基础，不能太难😆。</p><p>我之前有给大家推荐过 GitHub 上的 vhr、mall 和 miaosha，那这次想换个思路，到 B 站上淘一淘如何呢？</p><p>果真，还真让二哥找到了！小破站，YYDS！</p><h3 id="一、云-e-办" tabindex="-1"><a class="header-anchor" href="#一、云-e-办" aria-hidden="true">#</a> 一、云 E 办</h3><p>这是一个带大家从 0 搭建一个 Spring Boot+ Vue 的前后端分离的 Java 项目，前 P71 讲前端，P72 到 P131 讲后端。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/kaiyuan/yuneban-wangyiyunyinyue-02.png" alt=""></p><p>前端涉及到的技术有 Vue 全家桶、ElementUI；后端涉及到的技术有 Spring Boot、SpringMVC、MyBatisPlus、SpringSecurity、Swagger、Redis、EasyPOI、RabbitMQ、FasfDFS 等等。</p><p>视频整体上是不错的，up 的声音也很清晰，听起来很舒服。</p><p>为了验证 up 是不是一家培训机构，顺带替大家踩踩坑。我按照要求加了小助理的微信：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/kaiyuan/yuneban-wangyiyunyinyue-03.png" alt=""></p><p>加好友时一看头像，和平常偷偷摸摸混进群的广告党差不多，哈哈哈。</p><p>通过好友后，再去一查「乐字节」这个关键字，果然是一家培训机构，不过视频既然公开了出来，并且质量也说得过去，那果断学习一波也是很舒服的。</p><p>有时候，培训机构公开出来的视频课可能要好过付费小几万的付费视频课，毕竟拿出来的东西不能太水，否则会砸了自己招牌。</p><p>况且，二哥深入虎穴这一波也替大家踩过坑了，源码和课件都拿到了，直接在公众号后台回复关键字「<strong>B站</strong>」就可以拉取到了，不用再去加小助理微信了，大家可以放心食用。</p><p>怎么样，二哥这波安全拦截做得漂亮吧？</p><h3 id="二、仿网易云音乐的小网站" tabindex="-1"><a class="header-anchor" href="#二、仿网易云音乐的小网站" aria-hidden="true">#</a> 二、仿网易云音乐的小网站</h3><p>这是读者提供的一个前后端分离项目，问我项目怎么样，我点开去一看，这不一个号主朋友的嘛。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/kaiyuan/yuneban-wangyiyunyinyue-04.png" alt=""></p><p>网站的客户端和管理端使用 VUE 框架来实现的，服务端使用 Spring Boot + MyBatis 来实现，数据库使用了 MySQL。建议至少 1.5 倍速食用。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/kaiyuan/yuneban-wangyiyunyinyue-05.png" alt=""></p><p>前后端整体的项目结构也挺清晰的，这是后端的。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>├── avatorImages // 用户头像
 ├── img
 │   ├── singerPic // 歌手图片
 │   ├── songListPic // 歌单图片
@@ -71,6 +71,6 @@
 ├── pom.xml // 添加相关依赖和插件
 └── target
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>整体的思路很简单，前端要访问数据的时候，后端就提供相应接口，通过 Controller 层监听请求， 数据的处理交给 Service 层，而 Service 层再通过 Mapper 层操作数据库，操作完成后数据再一层层往上走，最后返回给前端。</p><p>up 也非常的良心，源码都开源到 GitHub 上了。</p><blockquote><p>https://github.com/Yin-Hongwei/music-website</p></blockquote><p>随便再展示两张项目的效果图吧。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/kaiyuan/yuneban-wangyiyunyinyue-06.png" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/kaiyuan/yuneban-wangyiyunyinyue-07.png" alt=""></p><p>项目的基本功能也很完善：</p><ul><li>音乐播放</li><li>用户登录注册</li><li>用户信息编辑、头像修改</li><li>歌曲、歌单搜索</li><li>歌单打分</li><li>歌单、歌曲评论</li><li>歌单列表、歌手列表分页显示</li><li>歌词同步显示</li><li>音乐收藏、下载、拖动控制、音量控制</li><li>后台对用户、歌曲、歌手、歌单信息的管理</li></ul><p>作为练手项目，绝壁是合适的。</p><hr><p>跟着视频做练手项目的最大好处就是，可以实时地看到 up 主手敲代码的过程，顺带还可以体验一把产品经理的快乐，给 up 主提需求，哈哈。</p><p>这里分享一下二哥在观看视频中最大的快乐：review 代码，哈哈哈，尤其是看到 up 敲错代码出现 bug 时，我内心是极其快乐（痛苦）的，因为这让我想起刚实习时被 leader 劈头盖脸批评时的窘境。。</p><p>大学阶段做的练手项目没必要做太高大上的，也没必要追求三高：高并发、高可用、高性能，就简简单单的，把所学到的知识运用进去，能达到检验学习成果的目的就 OK 了。</p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/kaiyuan/yuneban-wangyiyunyinyue.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/12 下午4:24:21</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><!----><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 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class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/manongshenghuo/waibao-1geyue.html#背景" class="router-link-active router-link-exact-active toc-link level3">背景</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/manongshenghuo/waibao-1geyue.html#动机" class="router-link-active router-link-exact-active toc-link level3">动机</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/manongshenghuo/waibao-1geyue.html#渠道" class="router-link-active router-link-exact-active toc-link level3">渠道</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/manongshenghuo/waibao-1geyue.html#收入" class="router-link-active router-link-exact-active toc-link level3">收入</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/manongshenghuo/waibao-1geyue.html#报价" class="router-link-active router-link-exact-active toc-link level3">报价</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/manongshenghuo/waibao-1geyue.html#作息" class="router-link-active router-link-exact-active toc-link level3">作息</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><p>大家好，我是二哥呀！昨天听一个前同事说，他在公司过得非常不开心，原因是他的上级被处分了，导致他受到了波及，打算裸辞全职接外包，问我靠谱不靠谱？后面找机会给大家聊聊我的看法。</p><p>今天先来分享一个程序员裸辞接单的故事，不过，他接单时间比较短，大概一个月。全职接单前，他虽然工作了一年有余，但是项目经历还是比较少。他在这一个月的接单中：</p><ul><li>接触了我非常陌生的 php，python；</li><li>用 react + django 写了一个简单的社交网站；</li><li>用 heroku 部署了两个网站；接触了以太坊加密；</li><li>用 css3d 构建了圣诞节的 3d 场景，包括了用 PS 画图；</li><li>接触了炒股软件开发（vue），学会了看 k 线；</li><li>接触了 google group varint 压缩算法；</li><li>做了个网页帮留学生在国外宣传敦煌文化......</li></ul><p>总的来说，内容很丰富，虽然都不是什么大需求。由于他学习东西比较快，debug 能力还行，原本只打算接前端的单子，但是总是在自己的能力边界徘徊，也就学会了见招拆招，做一些其他语言或框架的工作。</p><p>下面就由他的第一视角来分享一下全职接单一个月的感受，希望能给小伙伴们一点点启发和帮助</p><hr><h3 id="背景" tabindex="-1"><a class="header-anchor" href="#背景" aria-hidden="true">#</a> 背景</h3><p>鄙人本科毕业一年有余，计算机专业。全栈工程师，但更喜欢前端的工作，于是在一家游戏公司任职前端工作。在这个内卷的时代，身处一线城市，来自全国各地的优秀学院/培训机构人才辈出，涌入市场，竞争激烈，各大公司并驱争先用丰厚的薪水，优渥的待遇去吸引更优秀人才入职。</p><p>但是，现在已经过了 ”不会但我会学“ 就能感动面试官的时代，随着供需关系的变化，不论是对于面试官还是面试者，面试的成本越来越高。为了筛选到更优秀的程序员，面试官们可谓是绞尽了脑汁，”面试造火箭，工作拧螺丝“ 的传言也不是空穴来风。</p><p>鄙人在学生时代考试就不太愿意复习，面试的准备我也是比较随缘，理所应当地尝到了 ”不好好准备面试“ 的后果。</p><h3 id="动机" tabindex="-1"><a class="header-anchor" href="#动机" aria-hidden="true">#</a> 动机</h3><p>根据前面背景的介绍，在上一份工作准备离职前，我已经找好下家。带着美好的期待跳槽进入之后发现与想象之中相差甚远，除了薪资比之前高不少，其余都在预期以下。于是便选择了裸辞（虽然入职手续还没办完），随后虽然也找了几家，但是 “一朝被蛇咬，十年怕草绳”，后面都很小心地找工作，而且可能是感觉对大部分的公司的前端业务（做做后台这样子）都提不起兴趣。</p><p>差不多一周之后，我想这样下去也不是办法，于是就想不如在家接单吧...</p><h3 id="渠道" tabindex="-1"><a class="header-anchor" href="#渠道" aria-hidden="true">#</a> 渠道</h3><p>我的渠道主要是在各外包 Q 群里（一些网站的兼职也是可以考虑，如果外语过关可以去国外的 upwork 或者 stackoverflow 等）</p><p>Q 群的用户端入口一般都是某宝店铺，如果想要接单的，可以加入一些 Q 群，也可以直接去找店铺然后联系客服，让他拉你进群。</p><p>你也可以和一个靠谱的中介建立稳定的合作关系，这样你就不缺需求了。</p><p>其实大学时我就试过接单了，从校内课程设计，到一些学校的毕设，后来开了某宝店，提供软件外包和咨询服务。（由于太久没管理，店铺已经不存在了）</p><h3 id="收入" tabindex="-1"><a class="header-anchor" href="#收入" aria-hidden="true">#</a> 收入</h3><p>大家最看重的可能就是收入问题了，本文没有网上说的月入大几万这么夸张。从上个月开始兼职，大概工作了 20 几天，赚了 11K+，不过由于有中介费的存在，实际到手也就 9 ～ 10K。不过对于一份在家的兼职工作，这个收入还是过得去。</p><p>与一份稳定的工作不同，自己接单不存在上班摸鱼这个概念。上班摸鱼摸一个月，你的工资还是一样照发，同时你还要考虑节假日，五险一金等等。</p><h3 id="报价" tabindex="-1"><a class="header-anchor" href="#报价" aria-hidden="true">#</a> 报价</h3><p>一般来说报价是按照这个公式来算：</p><p>报价=日薪 ∗ 工期报价 = 日薪 * 工期报价=日薪 ∗ 工期</p><p>不过也没必要完全按照这个标准，我的标准很简单：不会因为价格太低而感到后悔，也不会因为价格太高而感到心虚。</p><p>报价前要了解你将要做的是什么，需要花多久。客户需要装环境吗，如果需要你预计花多久搞定等等......</p><h3 id="作息" tabindex="-1"><a class="header-anchor" href="#作息" aria-hidden="true">#</a> 作息</h3><p>接单作为兼职，在业余时间抽空做一些小单子。时间很容易把控。但把这个当成全职之后，就不可同日而语。假如你和我一样，并不是跟家里人住在一起，而是在外租房，没有公司的朝九晚五（996），你的时间概念可能会慢慢缺失，你的所有时间都需要你来掌控（虽然对于自律的人，这可能不是什么问题）。</p><p>在经过一个客户连续两三天的需求，每天都忙到凌晨四五点才睡。彻底把我原本就不平衡的作息给搅成糊。之后的几天，我的作息都无法完整调整过来。于是我给自己放了一周的假期，回了一趟家，在家里的作息又恢复正常，于是才回来继续工作。现在已经作息比较规律了。</p><p>作息规律，多出去走走，不要久坐，没有工作之后，你想干什么，随时去干吧。</p><p>能看到这的，你可能或多或少是有这方面的考虑，不容易啊，加油吧。</p><p>闲暇之余，也有了时间去丰富自己的项目经历，于是开始用 electron + react + nodejs + rust 开发一个去中心化加密社交软件，如果感兴趣的可以加入我 ～</p><p>btw：如果有好的工作机会欢迎联系我（Rust），目前住在广州，打算明年搬去武汉。如果是远程的话也可以。</p><hr><blockquote><p>原文链接：https://juejin.cn/post/7032317937339858952</p></blockquote><p>分享的最后，二哥简单来说两句。</p><p>对于程序员来说，跳槽还是得准备 fallback 方案，起码 offer 可以准备多几个再跳槽。如果一不小心 gap 了， 那靠接单来维持生计不失为一个好的路子，但是如果打算一直接单的话，还是需要结合自身情况。</p><p>这里总结一些我认为值得注意的点：</p><ul><li>一个单子明显不能做的时候，要趁早告知客户。例如明显超出自身能力范围，或者说这个需求根本做不了。</li><li>最好同时不接超过三单，同时接好几单会很消耗你的心力。</li><li>客户要求比较含糊的时候，一定要搞清楚所有需求，不然后面可能会不断加细节，加需求，另外了解需求才能给一个合适的报价。</li><li>跟客户友好沟通，出现联系不上的时候，不要着急。收钱办事，不用掺杂各种情绪。如果由于联系不上客户导致赶不上工期，It&#39;s not your fault 。</li><li>合作完之后，如果你和客户都很满意对方的话，不妨加个好友，基于信任的基础上，如果以后有需求你们可以直接联系。</li></ul></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/manongshenghuo/waibao-1geyue.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 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class="theme-hope-content"><p>大家好，我是二哥呀！昨天听一个前同事说，他在公司过得非常不开心，原因是他的上级被处分了，导致他受到了波及，打算裸辞全职接外包，问我靠谱不靠谱？后面找机会给大家聊聊我的看法。</p><p>今天先来分享一个程序员裸辞接单的故事，不过，他接单时间比较短，大概一个月。全职接单前，他虽然工作了一年有余，但是项目经历还是比较少。他在这一个月的接单中：</p><ul><li>接触了我非常陌生的 php，python；</li><li>用 react + django 写了一个简单的社交网站；</li><li>用 heroku 部署了两个网站；接触了以太坊加密；</li><li>用 css3d 构建了圣诞节的 3d 场景，包括了用 PS 画图；</li><li>接触了炒股软件开发（vue），学会了看 k 线；</li><li>接触了 google group varint 压缩算法；</li><li>做了个网页帮留学生在国外宣传敦煌文化......</li></ul><p>总的来说，内容很丰富，虽然都不是什么大需求。由于他学习东西比较快，debug 能力还行，原本只打算接前端的单子，但是总是在自己的能力边界徘徊，也就学会了见招拆招，做一些其他语言或框架的工作。</p><p>下面就由他的第一视角来分享一下全职接单一个月的感受，希望能给小伙伴们一点点启发和帮助</p><hr><h3 id="背景" tabindex="-1"><a class="header-anchor" href="#背景" aria-hidden="true">#</a> 背景</h3><p>鄙人本科毕业一年有余，计算机专业。全栈工程师，但更喜欢前端的工作，于是在一家游戏公司任职前端工作。在这个内卷的时代，身处一线城市，来自全国各地的优秀学院/培训机构人才辈出，涌入市场，竞争激烈，各大公司并驱争先用丰厚的薪水，优渥的待遇去吸引更优秀人才入职。</p><p>但是，现在已经过了 ”不会但我会学“ 就能感动面试官的时代，随着供需关系的变化，不论是对于面试官还是面试者，面试的成本越来越高。为了筛选到更优秀的程序员，面试官们可谓是绞尽了脑汁，”面试造火箭，工作拧螺丝“ 的传言也不是空穴来风。</p><p>鄙人在学生时代考试就不太愿意复习，面试的准备我也是比较随缘，理所应当地尝到了 ”不好好准备面试“ 的后果。</p><h3 id="动机" tabindex="-1"><a class="header-anchor" href="#动机" aria-hidden="true">#</a> 动机</h3><p>根据前面背景的介绍，在上一份工作准备离职前，我已经找好下家。带着美好的期待跳槽进入之后发现与想象之中相差甚远，除了薪资比之前高不少，其余都在预期以下。于是便选择了裸辞（虽然入职手续还没办完），随后虽然也找了几家，但是 “一朝被蛇咬，十年怕草绳”，后面都很小心地找工作，而且可能是感觉对大部分的公司的前端业务（做做后台这样子）都提不起兴趣。</p><p>差不多一周之后，我想这样下去也不是办法，于是就想不如在家接单吧...</p><h3 id="渠道" tabindex="-1"><a class="header-anchor" href="#渠道" aria-hidden="true">#</a> 渠道</h3><p>我的渠道主要是在各外包 Q 群里（一些网站的兼职也是可以考虑，如果外语过关可以去国外的 upwork 或者 stackoverflow 等）</p><p>Q 群的用户端入口一般都是某宝店铺，如果想要接单的，可以加入一些 Q 群，也可以直接去找店铺然后联系客服，让他拉你进群。</p><p>你也可以和一个靠谱的中介建立稳定的合作关系，这样你就不缺需求了。</p><p>其实大学时我就试过接单了，从校内课程设计，到一些学校的毕设，后来开了某宝店，提供软件外包和咨询服务。（由于太久没管理，店铺已经不存在了）</p><h3 id="收入" tabindex="-1"><a class="header-anchor" href="#收入" aria-hidden="true">#</a> 收入</h3><p>大家最看重的可能就是收入问题了，本文没有网上说的月入大几万这么夸张。从上个月开始兼职，大概工作了 20 几天，赚了 11K+，不过由于有中介费的存在，实际到手也就 9 ～ 10K。不过对于一份在家的兼职工作，这个收入还是过得去。</p><p>与一份稳定的工作不同，自己接单不存在上班摸鱼这个概念。上班摸鱼摸一个月，你的工资还是一样照发，同时你还要考虑节假日，五险一金等等。</p><h3 id="报价" tabindex="-1"><a class="header-anchor" href="#报价" aria-hidden="true">#</a> 报价</h3><p>一般来说报价是按照这个公式来算：</p><p>报价=日薪 ∗ 工期报价 = 日薪 * 工期报价=日薪 ∗ 工期</p><p>不过也没必要完全按照这个标准，我的标准很简单：不会因为价格太低而感到后悔，也不会因为价格太高而感到心虚。</p><p>报价前要了解你将要做的是什么，需要花多久。客户需要装环境吗，如果需要你预计花多久搞定等等......</p><h3 id="作息" tabindex="-1"><a class="header-anchor" href="#作息" aria-hidden="true">#</a> 作息</h3><p>接单作为兼职，在业余时间抽空做一些小单子。时间很容易把控。但把这个当成全职之后，就不可同日而语。假如你和我一样，并不是跟家里人住在一起，而是在外租房，没有公司的朝九晚五（996），你的时间概念可能会慢慢缺失，你的所有时间都需要你来掌控（虽然对于自律的人，这可能不是什么问题）。</p><p>在经过一个客户连续两三天的需求，每天都忙到凌晨四五点才睡。彻底把我原本就不平衡的作息给搅成糊。之后的几天，我的作息都无法完整调整过来。于是我给自己放了一周的假期，回了一趟家，在家里的作息又恢复正常，于是才回来继续工作。现在已经作息比较规律了。</p><p>作息规律，多出去走走，不要久坐，没有工作之后，你想干什么，随时去干吧。</p><p>能看到这的，你可能或多或少是有这方面的考虑，不容易啊，加油吧。</p><p>闲暇之余，也有了时间去丰富自己的项目经历，于是开始用 electron + react + nodejs + rust 开发一个去中心化加密社交软件，如果感兴趣的可以加入我 ～</p><p>btw：如果有好的工作机会欢迎联系我（Rust），目前住在广州，打算明年搬去武汉。如果是远程的话也可以。</p><hr><blockquote><p>原文链接：https://juejin.cn/post/7032317937339858952</p></blockquote><p>分享的最后，二哥简单来说两句。</p><p>对于程序员来说，跳槽还是得准备 fallback 方案，起码 offer 可以准备多几个再跳槽。如果一不小心 gap 了， 那靠接单来维持生计不失为一个好的路子，但是如果打算一直接单的话，还是需要结合自身情况。</p><p>这里总结一些我认为值得注意的点：</p><ul><li>一个单子明显不能做的时候，要趁早告知客户。例如明显超出自身能力范围，或者说这个需求根本做不了。</li><li>最好同时不接超过三单，同时接好几单会很消耗你的心力。</li><li>客户要求比较含糊的时候，一定要搞清楚所有需求，不然后面可能会不断加细节，加需求，另外了解需求才能给一个合适的报价。</li><li>跟客户友好沟通，出现联系不上的时候，不要着急。收钱办事，不用掺杂各种情绪。如果由于联系不上客户导致赶不上工期，It&#39;s not your fault 。</li><li>合作完之后，如果你和客户都很满意对方的话，不妨加个好友，基于信任的基础上，如果以后有需求你们可以直接联系。</li></ul></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/manongshenghuo/waibao-1geyue.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" 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class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/manongshenghuo/yanjiusuo-20wan.html#研究所月入两万-是什么体验" class="router-link-active router-link-exact-active toc-link level2">研究所月入两万，是什么体验？</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h2 id="研究所月入两万-是什么体验" tabindex="-1"><a class="header-anchor" href="#研究所月入两万-是什么体验" aria-hidden="true">#</a> 研究所月入两万，是什么体验？</h2><p>大家好，我是二哥呀。</p><p>之前在一篇<a href="https://mp.weixin.qq.com/s/oc-6Um6y0LlpSQwDY4HAbw" target="_blank" rel="noopener noreferrer">美团还是研究所，美团年包多二十万，怎么选<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>的文章里做过一个投票：一线互联网大厂还是二三线城市的研究所？</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/manongshenghuo/yanjiusuo-20wan-1.png" alt=""></p><p>1000 多人的投票结果中，选择研究所的竟然比选择互联网的多一些，看来向往研究所那种能兼顾生活和工作的小伙伴不在少数啊。</p><p>怎么说呢？各有利弊，看选择什么样的生活了。这里给大家分享一位答主朋友在研究所工作的感受。希望对小伙伴们有一点点帮助和启发~</p><hr><blockquote><p>作者：易贝贝 https://www.zhihu.com/question/64371326/answer/2251105460</p></blockquote><p>2019 年 7 月毕业于北航，后入职西安某所。</p><p>先发个收入截图吧。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/manongshenghuo/yanjiusuo-20wan-2.png" alt=""></p><p>首先声明我这个收入是要低于跟我同年上大学，2014年硕士入所的同学的，我比较熟的技术部门的同学收入加公积金在30左右了，不是很多人想的博士才这么点硕士更少了。我要达到这个数字估计还得两年左右。</p><p>有人说说博士才这点钱，对于不了解行情的，我只能回答：能赚很多钱是世人对博士最大的误解；对于秀优越的，你先看看自己是不是下面两种情况里的反面典型。对于我来说，可能因为是穷苦人家的孩子，从小没见过啥钱，所以觉得这个收入还可以。</p><p>还有一些学弟也是博士纠结待遇问题，问我收入为什么这么少，我这里有点心得跟你们分享下，不一定全对。</p><p>首先我司名声在外，确实不愁招不到人，所以没有安家费，博士也没有什么特殊的照顾，就按正常的工资体系发钱。</p><p>有些单位会给博士安家费，为什么给安家费你可以琢磨一下，据我所知北京的几个大总体基本都没有安家费，或者有跟没有一样。</p><p>有些单位会拔高薪酬给你，这样一方面是可能不能持续，比如给你三五年，另一方面造成新老员工工资倒挂，引起内部矛盾，工程领域是很需要师徒传承的，一个新人一来单位就因为待遇问题被敌视，你可以想象一下。</p><p>而且客观讲，我们总体单位不会因为一个博士来了就会有什么大的技术提升，你来了也是学习。我有时候觉得单位不嫌我年龄大肝不动肯收留我就该知足了。</p><p>对于找工作尤其是体制内的的博士，如果一个单位承诺给你很多钱，可能是：</p><ul><li>1、这个单位真的很有钱，大家收入都很高;</li><li>2、你确实能给单位做别人做不了的贡献，单位很需要你。</li></ul><p>如果不是这两点，你就要考虑是不是坑了。虽然国企的钱不是人力自己家的，但是人力想要超出工资体系地给你报酬其实是件挺不好办的事，这事在国企可能比私企难度大得多，如果他能正常的招到他想要招的优秀的博士，他干嘛要给自己找事，还容易引起矛盾，为了让你谢他吗？</p><p>对于私企逻辑更简单，企业逻辑跟风投一样，他给你一块钱钱，你创造10块钱100块钱的价值（此价值不一定是马上看到的经济利益），你创造不了开了你就是了。</p><p>心得分享完毕，继续正题。</p><p>周围房价不到两万，两公里外华润盖在西安ccbd万象城旁边的大平层不到两万五，地段参考北京国贸旁边的新城国际。当年在一院面试，人力跟我说你找个航天的女朋友，两个人攒五年可以不靠家里在北京买房。我们这边附近各方面还可以的房子（100平左右，南北通透，小区还可以），差不多200w，我周围的年轻人基本入职两年也都买房了，毕竟五六十万的首付自己攒一点家里凑一点还是容易很多。</p><p>我觉得吧，衡量一个工作好坏，不同的人有不同的衡量标准，我本来想说钱肯定是最重要的但不是唯一的，后来觉得可能对有些人来说钱都不是最重要的。</p><p>与我而言，收入，稳定性，是不是喜欢，有没有意义，我能不能胜任，累不累，地方在哪离家近不近…都是需要考虑的问题。</p><p>我觉得研究所真正的吸引力在于这么几点：</p><p>1、最重要的，你做的事是对国家对民族对社会对自己有意义的事。</p><p>你不只为了谋生而单纯的在给资本家打工，不是在帮资本家割韭菜，更不是在帮外国的资本割中国人的韭菜，你是在为中华民族的伟大复兴做贡献，这里怕得罪人被喷，我不展开说了。</p><p>我没有在开玩笑，我现在的工作是综合考虑家庭（我是西安土著），收入，专业，稳定等各个方面的最优解。但是我司做的东西没有航母，核潜艇，歼20，运20，远轰，战略导弹，反舰弹道导弹，高超声速巡航武器，载人航天那么牛逼闪闪，我有时候跟同学师兄弟们聊天的时候想想人家做的东西，是有些遗憾的，虽然这些单位性价比甚至绝对收入都不如我们。</p><p>2、稳定，我工作了一个月就明白了一个道理</p><p>其实很多企业能给人那么多钱，是因为没有很大的负担，可以给拼命干活的年轻人很多钱，可是，谁又能一直拼命下去呢，谁又能保证自己一定可以上得去呢，升职这种事不光要自己努力，也要机遇的，所以很多看似目前收入很高的工作，其实是把未来很多年的钱，拿出一小部分现在给你，让你拼命干活。</p><p>换言之，我们现在的收入一般，其实是把一部分该给年轻人拼命的钱给了肝不动的同志，我觉得这也没啥，毕竟现在单位的基业也是他们肝出来的。</p><p>我一直觉得一个理论挺对的，从体制内出去，收入翻翻是至少的，要不然想都别想。不用担心公司倒闭，不用担心自己被优化，也就少了很多勾心斗角，安心干自己工作就好，这种感觉也是可以折现的。</p><p>所以我很同意别的答主说的航天适合家境小康的人，毕竟在年轻人尤其是男人最缺钱的25-35岁，系统内可能同样需要拼命但是不给你那么多钱。这个时候如果家里能给一笔启动资金或者全款买房，生活就不会捉襟见肘。就我个人而言，我家在西安算小康，在北京是赤贫。所以在西安的研究所我觉得自己收入还可以。我面完载人航天总体部搜了一下周围小1000万的房子，想了想月供三万的日子，我觉得我的家庭承载不了这样的理想。</p><hr><p>分享结束，你的选择是互联网 or 研究所？</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/manongshenghuo/yanjiusuo-20wan-3.png" alt=""></p><p><em>没有什么使我停留——除了目的，纵然岸旁有玫瑰、有绿荫、有宁静的港湾，我是不系之舟</em>。</p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/manongshenghuo/yanjiusuo-20wan.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 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9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 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19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 7 分钟</span><meta property="timeRequired" content="PT7M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/manongshenghuo/yanjiusuo-20wan.html#研究所月入两万-是什么体验" class="router-link-active router-link-exact-active toc-link level2">研究所月入两万，是什么体验？</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h2 id="研究所月入两万-是什么体验" tabindex="-1"><a class="header-anchor" href="#研究所月入两万-是什么体验" aria-hidden="true">#</a> 研究所月入两万，是什么体验？</h2><p>大家好，我是二哥呀。</p><p>之前在一篇<a href="https://mp.weixin.qq.com/s/oc-6Um6y0LlpSQwDY4HAbw" target="_blank" rel="noopener noreferrer">美团还是研究所，美团年包多二十万，怎么选<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>的文章里做过一个投票：一线互联网大厂还是二三线城市的研究所？</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/manongshenghuo/yanjiusuo-20wan-1.png" alt=""></p><p>1000 多人的投票结果中，选择研究所的竟然比选择互联网的多一些，看来向往研究所那种能兼顾生活和工作的小伙伴不在少数啊。</p><p>怎么说呢？各有利弊，看选择什么样的生活了。这里给大家分享一位答主朋友在研究所工作的感受。希望对小伙伴们有一点点帮助和启发~</p><hr><blockquote><p>作者：易贝贝 https://www.zhihu.com/question/64371326/answer/2251105460</p></blockquote><p>2019 年 7 月毕业于北航，后入职西安某所。</p><p>先发个收入截图吧。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/manongshenghuo/yanjiusuo-20wan-2.png" alt=""></p><p>首先声明我这个收入是要低于跟我同年上大学，2014年硕士入所的同学的，我比较熟的技术部门的同学收入加公积金在30左右了，不是很多人想的博士才这么点硕士更少了。我要达到这个数字估计还得两年左右。</p><p>有人说说博士才这点钱，对于不了解行情的，我只能回答：能赚很多钱是世人对博士最大的误解；对于秀优越的，你先看看自己是不是下面两种情况里的反面典型。对于我来说，可能因为是穷苦人家的孩子，从小没见过啥钱，所以觉得这个收入还可以。</p><p>还有一些学弟也是博士纠结待遇问题，问我收入为什么这么少，我这里有点心得跟你们分享下，不一定全对。</p><p>首先我司名声在外，确实不愁招不到人，所以没有安家费，博士也没有什么特殊的照顾，就按正常的工资体系发钱。</p><p>有些单位会给博士安家费，为什么给安家费你可以琢磨一下，据我所知北京的几个大总体基本都没有安家费，或者有跟没有一样。</p><p>有些单位会拔高薪酬给你，这样一方面是可能不能持续，比如给你三五年，另一方面造成新老员工工资倒挂，引起内部矛盾，工程领域是很需要师徒传承的，一个新人一来单位就因为待遇问题被敌视，你可以想象一下。</p><p>而且客观讲，我们总体单位不会因为一个博士来了就会有什么大的技术提升，你来了也是学习。我有时候觉得单位不嫌我年龄大肝不动肯收留我就该知足了。</p><p>对于找工作尤其是体制内的的博士，如果一个单位承诺给你很多钱，可能是：</p><ul><li>1、这个单位真的很有钱，大家收入都很高;</li><li>2、你确实能给单位做别人做不了的贡献，单位很需要你。</li></ul><p>如果不是这两点，你就要考虑是不是坑了。虽然国企的钱不是人力自己家的，但是人力想要超出工资体系地给你报酬其实是件挺不好办的事，这事在国企可能比私企难度大得多，如果他能正常的招到他想要招的优秀的博士，他干嘛要给自己找事，还容易引起矛盾，为了让你谢他吗？</p><p>对于私企逻辑更简单，企业逻辑跟风投一样，他给你一块钱钱，你创造10块钱100块钱的价值（此价值不一定是马上看到的经济利益），你创造不了开了你就是了。</p><p>心得分享完毕，继续正题。</p><p>周围房价不到两万，两公里外华润盖在西安ccbd万象城旁边的大平层不到两万五，地段参考北京国贸旁边的新城国际。当年在一院面试，人力跟我说你找个航天的女朋友，两个人攒五年可以不靠家里在北京买房。我们这边附近各方面还可以的房子（100平左右，南北通透，小区还可以），差不多200w，我周围的年轻人基本入职两年也都买房了，毕竟五六十万的首付自己攒一点家里凑一点还是容易很多。</p><p>我觉得吧，衡量一个工作好坏，不同的人有不同的衡量标准，我本来想说钱肯定是最重要的但不是唯一的，后来觉得可能对有些人来说钱都不是最重要的。</p><p>与我而言，收入，稳定性，是不是喜欢，有没有意义，我能不能胜任，累不累，地方在哪离家近不近…都是需要考虑的问题。</p><p>我觉得研究所真正的吸引力在于这么几点：</p><p>1、最重要的，你做的事是对国家对民族对社会对自己有意义的事。</p><p>你不只为了谋生而单纯的在给资本家打工，不是在帮资本家割韭菜，更不是在帮外国的资本割中国人的韭菜，你是在为中华民族的伟大复兴做贡献，这里怕得罪人被喷，我不展开说了。</p><p>我没有在开玩笑，我现在的工作是综合考虑家庭（我是西安土著），收入，专业，稳定等各个方面的最优解。但是我司做的东西没有航母，核潜艇，歼20，运20，远轰，战略导弹，反舰弹道导弹，高超声速巡航武器，载人航天那么牛逼闪闪，我有时候跟同学师兄弟们聊天的时候想想人家做的东西，是有些遗憾的，虽然这些单位性价比甚至绝对收入都不如我们。</p><p>2、稳定，我工作了一个月就明白了一个道理</p><p>其实很多企业能给人那么多钱，是因为没有很大的负担，可以给拼命干活的年轻人很多钱，可是，谁又能一直拼命下去呢，谁又能保证自己一定可以上得去呢，升职这种事不光要自己努力，也要机遇的，所以很多看似目前收入很高的工作，其实是把未来很多年的钱，拿出一小部分现在给你，让你拼命干活。</p><p>换言之，我们现在的收入一般，其实是把一部分该给年轻人拼命的钱给了肝不动的同志，我觉得这也没啥，毕竟现在单位的基业也是他们肝出来的。</p><p>我一直觉得一个理论挺对的，从体制内出去，收入翻翻是至少的，要不然想都别想。不用担心公司倒闭，不用担心自己被优化，也就少了很多勾心斗角，安心干自己工作就好，这种感觉也是可以折现的。</p><p>所以我很同意别的答主说的航天适合家境小康的人，毕竟在年轻人尤其是男人最缺钱的25-35岁，系统内可能同样需要拼命但是不给你那么多钱。这个时候如果家里能给一笔启动资金或者全款买房，生活就不会捉襟见肘。就我个人而言，我家在西安算小康，在北京是赤贫。所以在西安的研究所我觉得自己收入还可以。我面完载人航天总体部搜了一下周围小1000万的房子，想了想月供三万的日子，我觉得我的家庭承载不了这样的理想。</p><hr><p>分享结束，你的选择是互联网 or 研究所？</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/manongshenghuo/yanjiusuo-20wan-3.png" alt=""></p><p><em>没有什么使我停留——除了目的，纵然岸旁有玫瑰、有绿荫、有宁静的港湾，我是不系之舟</em>。</p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/manongshenghuo/yanjiusuo-20wan.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 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class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->终于把项目构建神器Maven捋清楚了~</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2021年11月23日</span><meta property="datePublished" content="2021-11-23T06:29:54.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 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aria-current="page" href="/maven/maven.html#一、安装-maven" class="router-link-active router-link-exact-active toc-link level3">一、安装 Maven</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/maven/maven.html#二、maven-配置文件大盘点" class="router-link-active router-link-exact-active toc-link level3">二、Maven 配置文件大盘点</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/maven/maven.html#三、maven-仓库" class="router-link-active router-link-exact-active toc-link level3">三、Maven 仓库</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/maven/maven.html#四、使用-maven" class="router-link-active router-link-exact-active toc-link level3">四、使用 Maven</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/maven/maven.html#五、守护版-maven-更快" class="router-link-active router-link-exact-active toc-link level3">五、守护版 Maven，更快！</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="终于把项目构建神器maven捋清楚了" tabindex="-1"><a class="header-anchor" href="#终于把项目构建神器maven捋清楚了" aria-hidden="true">#</a> 终于把项目构建神器Maven捋清楚了~</h1><p>今天来给大家介绍一款项目构建神器——Maven，不仅能帮我们自动化构建，还能够抽象构建过程，提供构建任务实现；它跨平台，对外提供了一致的操作接口，这一切足以使它成为优秀的、流行的构建工具，从此以后，再也不用担心项目搞崩了。</p><p>总结一下 Maven 的优点，主要有以下 3 点：</p><ul><li><strong>依赖管理</strong>：Maven 能帮助我们解决软件包依赖的管理问题，不再需要提交大量的 jar 包、引入第三方库；</li><li><strong>规范目录结构</strong>：Maven 标准的目录结构有助于项目构建的标准化，通过配置 profile 还可以根据不同的环境（开发环境、测试环境，生产环境）读取不同的配置文件；</li><li><strong>方便集成</strong>：能够集成在 IDE 中更方便使用。</li></ul><h3 id="一、安装-maven" tabindex="-1"><a class="header-anchor" href="#一、安装-maven" aria-hidden="true">#</a> 一、安装 Maven</h3><p>由于 JDK 是 Maven 安装的前置条件，所以请使用 <code>java -version</code> 确认是否已经安装了 JDK：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/maven/maven-01.png" alt=""></p><p>我本人使用的是 macOS，所以可以有两种安装方式，<strong>一种官网下载，手动安装；一种直接使用 brew 一键安装</strong>。</p><p>我们先介绍<em>官网下载，手动安装</em>，该方式同样适用于 Windows 系统，差别可参照 Maven 官网安装教程：</p><blockquote><p><a href="http://maven.apache.org/install.html" target="_blank" rel="noopener noreferrer">http://maven.apache.org/install.html<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>1）<strong>一种官网下载，手动安装</strong></p><p>第一步，去官网下载 Maven 安装包：</p><blockquote><p>官网地址：<a href="http://maven.apache.org/download.cgi" target="_blank" rel="noopener noreferrer">http://maven.apache.org/download.cgi<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/maven/maven-02.png" alt=""></p><p>很多初学者在官网下载的时候不知道选哪一个，这里做一下简单的介绍。</p><ul><li>bin（binary）代表由 Java 源文件编译后的二进制 class 文件，src（source）代表Java 源文件。</li><li>一般情况下，选择 bin 文件进行安装就 OK 了；如果你想自己编译，可选 src 版本。</li><li>tar.gz 压缩格式适用于 Unix 操作系统，zip 适用于 Windows 操作系统；但不是绝对的。</li></ul><p>第二步，解压下载的安装包，复制该路径：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/maven/maven-03.png" alt=""></p><ul><li>bin 目录：该包含了 Maven 运行的所有脚本，用来配置 Java 命令，准备执行环境，然后执行 Java 命令。</li><li>boot 目录：该目录只包含了一个 plexus-classworlds-xxx-jar 文件，该文件是一个类加载器框架，相当于默认的 Java 类加载器，提供了更加丰富的语法以便配置，Maven 使用该加载器加载自己的类库。</li><li><strong>conf 目录</strong>：该目录包含了一个非常重要的文件 settings.xml。可以直接修改该文件，用来全局定制 Maven 的行为；也可以复制该文件到 <code>~/.m2/</code> 目录下（~表示用户目录），修改该文件可以在用户范围内定制 Maven 的行为。</li><li>lib 目录：该目录包含了Maven运行时所需要的 Java 类库，包括Maven 依赖的第三方类库，比如 slf4j-api.jar。</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/maven/maven-04.png" alt=""></p><p>第三步，配置环境变量</p><p>打开终端，输入 <code>vim ~/.bash_profile</code> 命令打开 bash_profile 文件：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/maven/maven-05.png" alt=""></p><p>bash_profile 文件用于配置环境变量和启动程序，详细介绍可参照：</p><blockquote><p><a href="https://www.cnblogs.com/kevingrace/p/8072860.html" target="_blank" rel="noopener noreferrer">https://www.cnblogs.com/kevingrace/p/8072860.html<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>在文件中添加设置环境变量的命令：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>export M2_HOME=/Users/maweiqing/cmower/save/apache-maven-3.8.3
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class="sidebar-heading clickable"><!----><span class="title">3.5 辅助工具</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.6 开源轮子</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.7 分布式</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.8 消息队列</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->终于把项目构建神器Maven捋清楚了~</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2021年11月23日</span><meta property="datePublished" content="2021-11-23T06:29:54.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category5" role>Java企业级开发</li><meta property="articleSection" content="Java企业级开发"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag0" role>Maven</li></ul><meta property="keywords" content="Maven"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 18 分钟</span><meta property="timeRequired" content="PT18M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/maven/maven.html#一、安装-maven" class="router-link-active router-link-exact-active toc-link level3">一、安装 Maven</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/maven/maven.html#二、maven-配置文件大盘点" class="router-link-active router-link-exact-active toc-link level3">二、Maven 配置文件大盘点</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/maven/maven.html#三、maven-仓库" class="router-link-active router-link-exact-active toc-link level3">三、Maven 仓库</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/maven/maven.html#四、使用-maven" class="router-link-active router-link-exact-active toc-link level3">四、使用 Maven</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/maven/maven.html#五、守护版-maven-更快" class="router-link-active router-link-exact-active toc-link level3">五、守护版 Maven，更快！</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="终于把项目构建神器maven捋清楚了" tabindex="-1"><a class="header-anchor" href="#终于把项目构建神器maven捋清楚了" aria-hidden="true">#</a> 终于把项目构建神器Maven捋清楚了~</h1><p>今天来给大家介绍一款项目构建神器——Maven，不仅能帮我们自动化构建，还能够抽象构建过程，提供构建任务实现；它跨平台，对外提供了一致的操作接口，这一切足以使它成为优秀的、流行的构建工具，从此以后，再也不用担心项目搞崩了。</p><p>总结一下 Maven 的优点，主要有以下 3 点：</p><ul><li><strong>依赖管理</strong>：Maven 能帮助我们解决软件包依赖的管理问题，不再需要提交大量的 jar 包、引入第三方库；</li><li><strong>规范目录结构</strong>：Maven 标准的目录结构有助于项目构建的标准化，通过配置 profile 还可以根据不同的环境（开发环境、测试环境，生产环境）读取不同的配置文件；</li><li><strong>方便集成</strong>：能够集成在 IDE 中更方便使用。</li></ul><h3 id="一、安装-maven" tabindex="-1"><a class="header-anchor" href="#一、安装-maven" aria-hidden="true">#</a> 一、安装 Maven</h3><p>由于 JDK 是 Maven 安装的前置条件，所以请使用 <code>java -version</code> 确认是否已经安装了 JDK：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/maven/maven-01.png" alt=""></p><p>我本人使用的是 macOS，所以可以有两种安装方式，<strong>一种官网下载，手动安装；一种直接使用 brew 一键安装</strong>。</p><p>我们先介绍<em>官网下载，手动安装</em>，该方式同样适用于 Windows 系统，差别可参照 Maven 官网安装教程：</p><blockquote><p><a href="http://maven.apache.org/install.html" target="_blank" rel="noopener noreferrer">http://maven.apache.org/install.html<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>1）<strong>一种官网下载，手动安装</strong></p><p>第一步，去官网下载 Maven 安装包：</p><blockquote><p>官网地址：<a href="http://maven.apache.org/download.cgi" target="_blank" rel="noopener noreferrer">http://maven.apache.org/download.cgi<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/maven/maven-02.png" alt=""></p><p>很多初学者在官网下载的时候不知道选哪一个，这里做一下简单的介绍。</p><ul><li>bin（binary）代表由 Java 源文件编译后的二进制 class 文件，src（source）代表Java 源文件。</li><li>一般情况下，选择 bin 文件进行安装就 OK 了；如果你想自己编译，可选 src 版本。</li><li>tar.gz 压缩格式适用于 Unix 操作系统，zip 适用于 Windows 操作系统；但不是绝对的。</li></ul><p>第二步，解压下载的安装包，复制该路径：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/maven/maven-03.png" alt=""></p><ul><li>bin 目录：该包含了 Maven 运行的所有脚本，用来配置 Java 命令，准备执行环境，然后执行 Java 命令。</li><li>boot 目录：该目录只包含了一个 plexus-classworlds-xxx-jar 文件，该文件是一个类加载器框架，相当于默认的 Java 类加载器，提供了更加丰富的语法以便配置，Maven 使用该加载器加载自己的类库。</li><li><strong>conf 目录</strong>：该目录包含了一个非常重要的文件 settings.xml。可以直接修改该文件，用来全局定制 Maven 的行为；也可以复制该文件到 <code>~/.m2/</code> 目录下（~表示用户目录），修改该文件可以在用户范围内定制 Maven 的行为。</li><li>lib 目录：该目录包含了Maven运行时所需要的 Java 类库，包括Maven 依赖的第三方类库，比如 slf4j-api.jar。</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/maven/maven-04.png" alt=""></p><p>第三步，配置环境变量</p><p>打开终端，输入 <code>vim ~/.bash_profile</code> 命令打开 bash_profile 文件：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/maven/maven-05.png" alt=""></p><p>bash_profile 文件用于配置环境变量和启动程序，详细介绍可参照：</p><blockquote><p><a href="https://www.cnblogs.com/kevingrace/p/8072860.html" target="_blank" rel="noopener noreferrer">https://www.cnblogs.com/kevingrace/p/8072860.html<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>在文件中添加设置环境变量的命令：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>export M2_HOME=/Users/maweiqing/cmower/save/apache-maven-3.8.3
 export PATH=${PATH}:${M2_HOME}/bin
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/maven/maven-06.png" alt=""></p><p>保存后退出，可以执行 <code>source ~/.bash_profile</code> 使配置生效：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/maven/maven-07.png" alt=""></p><p>第四步，查看配置是否生效</p><p>输入 <code>mvn -v</code> 命令，如果输出以下内容，表示配置成功：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/maven/maven-08.png" alt=""></p><p>如未生效，可再开一个终端窗口尝试 <code>mvn -v</code> 命令。</p><p><strong>2）brew 一键安装</strong></p><p>第一步，使用 <code>brew install maven</code> 命令一键安装，并自动配置环境变量</p><p>第二步，使用 <code>mvn -v</code> 命令查看版本</p><h3 id="二、maven-配置文件大盘点" tabindex="-1"><a class="header-anchor" href="#二、maven-配置文件大盘点" aria-hidden="true">#</a> 二、Maven 配置文件大盘点</h3><p>Maven 是基于 POM（Project Object Model） 进行的，项目的所有配置都会放在 pom.xml 文件中，包括项目的类型、名字，依赖关系，插件定制等等。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;?xml version=&quot;1.0&quot; encoding=&quot;UTF-8&quot;?&gt;
 &lt;project xmlns=&quot;http://maven.apache.org/POM/4.0.0&quot; xmlns:xsi=&quot;http://www.w3.org/2001/XMLSchema-instance&quot;
@@ -158,6 +158,6 @@ sdk install mvnd
 # macOS
 brew install mvndaemon/homebrew-mvnd/mvnd
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>为了方便演示，我这里采用手动安装的方式，速度也会更快一点。</p><p>通过下面的网址下载 mvnd 的 release 版本：</p><blockquote><p><a href="https://github.com/apache/maven-mvnd/releases" target="_blank" rel="noopener noreferrer">https://github.com/apache/maven-mvnd/releases<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/maven/mvnd-03.png" alt=""></p><p>下载完成后解压，然后把 bin 目录添加到 PATH 路径下。</p><p>在终端执行 <code>mvnd -v</code> 就可以查看到 mvnd 的配置信息了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/maven/mvnd-04.png" alt=""></p><p>如果出现类似下面这样的错误，未找到 JAVA_HOME，可以按照提示在对应的文件中追加 java.home 属性，也就是 JDK 的安装路径。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/maven/mvnd-05.png" alt=""></p><p>刚好之前搭建了一个Spring Boot 项目，我们可以拿 Maven 和 mvnd 来对比一下构建速度。</p><p>先执行 <code>mvn clean package</code> 命令，一共花费的时间是 5.318 秒。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/maven/mvnd-06.png" alt=""></p><p>再执行 <code>mvnd clean package</code> 命令，一共花费的时间是 3.225 秒。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/maven/mvnd-07.png" alt=""></p><p>反复多测试几次，发现 mvnd 确实比 Maven 要快上许多！Maven 维持在 5 秒多，mvnd 维持在 3 秒左右。</p><p>当然了，我本地这个 Spring Boot 项目本身非常简单，如果是构建时间更长一点的项目，mvnd 的优势会更大。</p><p>感受一下 mvnd 在一个 24 核电脑上执行的样子吧，简直就是效率神器！</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/maven/mvnd-08.gif" alt=""></p><hr><p>参考链接：</p><blockquote><ul><li>嘟嘟MD：<a href="http://tengj.top/2018/01/01/maven/" target="_blank" rel="noopener noreferrer">http://tengj.top/2018/01/01/maven/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li>杭建：《Java 工程师修炼之道》</li><li>许晓斌：<a href="https://www.infoq.cn/article/2011/04/xxb-maven-7-plugin" target="_blank" rel="noopener noreferrer">https://www.infoq.cn/article/2011/04/xxb-maven-7-plugin<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul></blockquote><p>希望大家能在阅读完本篇文章后对 Maven 有一个初步的了解和掌握，并将这些技能在项目的实战中加以练习，以达到项目工程化的要求。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a 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class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Redis：12道精选高频面试题</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 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106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category4" role>求职面试</li><meta property="articleSection" content="求职面试"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 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354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 8 分钟</span><meta property="timeRequired" content="PT8M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="redis-12道精选高频面试题" tabindex="-1"><a class="header-anchor" href="#redis-12道精选高频面试题" aria-hidden="true">#</a> Redis：12道精选高频面试题</h1><p>大家好，我是二哥呀。</p><p>Redis 是面试中绕不过的槛，只要在简历中写了用过 Redis，肯定逃不过。今天我们就来模拟一下面试官在 Redis 这个话题上是如何一步一步深入，全面考察候选人对于 Redis 的掌握情况。</p><p>小二：面试官，你好。我是来参加面试的。</p><p>面试官：你好，小二。我看了你的简历，熟练掌握 Redis，那么我就随便问你几个 Redis 相关的问题吧。首先我的问题是，<strong>Redis 是单线程还是多线程呢</strong>？</p><p>小二：</p><p>Redis 不同版本之间采用的线程模型是不一样的，在 Redis4.0 版本之前使用的是单线程模型，在 4.0 版本之后增加了多线程的支持。</p><p>在 4.0 之前虽然我们说 Redis 是单线程，也只是说它的网络 I/O 线程以及 Set 和 Get 操作是由一个线程完成的。但是 Redis 的持久化、集群同步还是使用其他线程来完成。</p><p>4.0 之后添加了多线程的支持，主要是体现在大数据的异步删除功能上，例如 unlink key、flushdb async、flushall async 等</p><p>面试官：回答的很好，<strong>那为什么 Redis 在 4.0 之前会选择使用单线程？而且使用单线程还那么快</strong>？</p><p>小二：</p><p>选择单线程个人觉得主要是使用简单，不存在锁竞争，可以在无锁的情况下完成所有操作，不存在死锁和线程切换带来的性能和时间上的开销，但同时单线程也不能完全发挥出多核 CPU 的性能。</p><p>至于为什么单线程那么快我觉得主要有以下几个原因：</p><ul><li>Redis 的大部分操作都在内存中完成，内存中的执行效率本身就很快，并且采用了高效的数据结构，比如哈希表和跳表。</li><li>使用单线程避免了多线程的竞争，省去了多线程切换带来的时间和性能开销，并且不会出现死锁。</li><li>采用 I/O 多路复用机制处理大量客户端的 Socket 请求，因为这是基于非阻塞的 I/O 模型，这就让 Redis 可以高效地进行网络通信，I/O 的读写流程也不再阻塞。</li></ul><p>面试官：不错，那 <strong>Redis 是如何实现数据不丢失的呢</strong>？</p><p>小二：</p><p>Redis 数据是存储在内存中的，为了保证 Redis 数据不丢失，那就要把数据从内存存储到磁盘上，以便在服务器重启后还能够从磁盘中恢复原有数据，这就是 Redis 的数据持久化。Redis 数据持久化有三种方式。</p><p><strong>1）AOF 日志（Append Only File，文件追加方式）</strong>：记录所有的操作命令，并以文本的形式追加到文件中。</p><p><strong>2）RDB 快照（Redis DataBase）</strong>：将某一个时刻的内存数据，以二进制的方式写入磁盘。</p><p><strong>3）混合持久化方式</strong>：Redis 4.0 新增了混合持久化的方式，集成了 RDB 和 AOF 的优点。</p><p>面试官：那你分别说说 <strong>AOF 和 RDB 的实现原理</strong>吧。</p><p>小二：</p><p>AOF 采用的是写后日志的方式，Redis 先执行命令把数据写入内存，然后再记录日志到文件中。AOF 日志记录的是操作命令，不是实际的数据，如果采用 AOF 方法做故障恢复时需要将全量日志都执行一遍。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mianjing/redis12question-1.png" alt=""></p><p>RDB 采用的是内存快照的方式，它记录的是某一时刻的数据，而不是操作，所以采用 RDB 方法做故障恢复时只需要直接把 RDB 文件读入内存即可，实现快速恢复。</p><p>面试官：你刚提到了 AOF 采用的是 “写后日志” 的方式，我们平时用的 MySQL 则采用的是 “写前日志”，那 <strong>Redis 为什么要先执行命令，再把数据写入日志呢</strong>？</p><p>小二：这个主要是由于 Redis 在写入日志之前，不对命令进行语法检查，所以只记录执行成功的命令，避免出现记录错误命令的情况，而且在命令执行后再写日志不会阻塞当前的写操作。</p><p>面试官：<strong>那后写日志又有什么风险呢</strong>？</p><p>小二：我... 这个我不会。</p><p>面试官：</p><p>好吧，后写日志主要有两个风险可能会发生：</p><ul><li><strong>数据可能会丢失</strong>：如果 Redis 刚执行完命令，此时发生故障宕机，会导致这条命令存在丢失的风险。</li><li><strong>可能阻塞其他操作</strong>：AOF 日志其实也是在主线程中执行，所以当 Redis 把日志文件写入磁盘的时候，还是会阻塞后续的操作无法执行。</li></ul><p>我还有个问题是 <strong>RDB 做快照时会阻塞线程吗</strong>？</p><p>小二：Redis 提供了两个命令来生成 RDB 快照文件，分别是 save 和 bgsave。save 命令在主线程中执行，会导致阻塞。而 bgsave 命令则会创建一个子进程，用于写入 RDB 文件的操作，避免了对主线程的阻塞，这也是 Redis RDB 的默认配置。</p><p>面试官：<strong>RDB 做快照的时候数据能修改吗</strong>？</p><p>小二：save 是同步的会阻塞客户端命令，bgsave 的时候是可以修改的。</p><p>面试官：那 Redis 是<strong>怎么解决在 bgsave 做快照的时候允许数据修改呢</strong>？</p><p>小二：额，这个我不太清楚...</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mianjing/redis12question-2.png" alt=""></p><p>面试官：</p><p>这里主要是利用 bgsave 的子线程实现的，具体操作如下：</p><ul><li>如果主线程执行读操作，则主线程和 bgsave 子进程互相不影响；</li><li>如果主线程执行写操作，则被修改的数据会复制一份副本，然后 bgsave 子进程会把该副本数据写入 RDB 文件，在这个过程中，主线程仍然可以直接修改原来的数据。</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mianjing/redis12question-3.png" alt=""></p><p>要注意，Redis 对 RDB 的执行频率非常重要，因为这会影响快照数据的完整性以及 Redis 的稳定性，所以在 Redis 4.0 后，增加了 AOF 和 RDB 混合的数据持久化机制： 把数据以 RDB 的方式写入文件，再将后续的操作命令以 AOF 的格式存入文件，既保证了 Redis 重启速度，又降低数据丢失风险。</p><p>小二：学到了学到了。</p><p>面试官：那你再跟我说说 <strong>Redis 如何实现高可用</strong>吧？</p><p>小二：Redis 实现高可用主要有三种方式：主从复制、哨兵模式，以及 Redis 集群。</p><p><strong>1）主从复制</strong></p><p>将从前的一台 Redis 服务器，同步数据到多台从 Redis 服务器上，即一主多从的模式，这个跟 MySQL 主从复制的原理一样。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mianjing/redis12question-4.png" alt=""></p><p><strong>2）哨兵模式</strong></p><p>使用 Redis 主从服务的时候，会有一个问题，就是当 Redis 的主从服务器出现故障宕机时，需要手动进行恢复，为了解决这个问题，Redis 增加了哨兵模式（因为哨兵模式做到了可以监控主从服务器，并且提供自动容灾恢复的功能）。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mianjing/redis12question-5.png" alt=""></p><p><strong>3）Redis Cluster（集群）</strong></p><p>Redis Cluster 是一种分布式去中心化的运行模式，是在 Redis 3.0 版本中推出的 Redis 集群方案，它将数据分布在不同的服务器上，以此来降低系统对单主节点的依赖，从而提高 Redis 服务的读写性能。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mianjing/redis12question-6.png" alt=""></p><p>面试官：使用哨兵模式在数据上有副本数据做保证，在可用性上又有哨兵监控，一旦 master 宕机会选举 salve 节点为 master 节点，这种已经满足了我们的生产环境需要，<strong>那为什么还需要使用集群模式呢</strong>？</p><p>小二：哨兵模式归根节点还是主从模式，在主从模式下我们可以通过增加 salve 节点来扩展读并发能力，但是没办法扩展写能力和存储能力，存储能力只能是 master 节点能够承载的上限。所以为了扩展写能力和存储能力，我们就需要引入集群模式。</p><p>面试官：集群中那么多 Master 节点，<strong>Redis Cluster 在存储的时候如何确定选择哪个节点呢</strong>？</p><p>小二：这应该是使用了某种 hash 算法，但是我不太清楚。。。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mianjing/redis12question-7.png" alt=""></p><p>面试官：那好，今天的面试就到这里吧，你先回去等我们的面试通知。</p><p>小二：好的，谢谢面试官，你能告诉我 Redis Cluster 怎么实现节点选择的吗？</p><p>面试官：</p><p>Redis Cluster 采用的是类一致性哈希算法实现节点选择的，至于什么是一致性哈希算法你自己回去看看。</p><p>Redis Cluster 将自己分成了 16384 个 Slot（槽位），哈希槽类似于数据分区，每个键值对都会根据它的 key，被映射到一个哈希槽中，具体执行过程分为两大步。</p><p>1）根据键值对的 key，按照 CRC16 算法计算一个 16 bit 的值。</p><p>2）再用 16bit 值对 16384 取模，得到 0~16383 范围内的模数，每个模数代表一个相应编号的哈希槽。</p><p>每个 Redis 节点负责处理一部分槽位，假如你有三个 master 节点 ABC，每个节点负责的槽位如下：</p><table><thead><tr><th>节点</th><th>处理槽位</th></tr></thead><tbody><tr><td>A</td><td>0-5000</td></tr><tr><td>B</td><td>5001 - 10000</td></tr><tr><td>C</td><td>10001 - 16383</td></tr></tbody></table><p>这样就实现了 cluster 节点的选择。</p><hr><p>文章来源于JAVA日知录 ，作者飘渺Jam 转载链接：https://mp.weixin.qq.com/s/GFUHslsSm96fJbhsCkFe_w</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/mianjing/redis12question.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 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18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category4" role>求职面试</li><meta property="articleSection" content="求职面试"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 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213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 8 分钟</span><meta property="timeRequired" content="PT8M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="redis-12道精选高频面试题" tabindex="-1"><a class="header-anchor" href="#redis-12道精选高频面试题" aria-hidden="true">#</a> Redis：12道精选高频面试题</h1><p>大家好，我是二哥呀。</p><p>Redis 是面试中绕不过的槛，只要在简历中写了用过 Redis，肯定逃不过。今天我们就来模拟一下面试官在 Redis 这个话题上是如何一步一步深入，全面考察候选人对于 Redis 的掌握情况。</p><p>小二：面试官，你好。我是来参加面试的。</p><p>面试官：你好，小二。我看了你的简历，熟练掌握 Redis，那么我就随便问你几个 Redis 相关的问题吧。首先我的问题是，<strong>Redis 是单线程还是多线程呢</strong>？</p><p>小二：</p><p>Redis 不同版本之间采用的线程模型是不一样的，在 Redis4.0 版本之前使用的是单线程模型，在 4.0 版本之后增加了多线程的支持。</p><p>在 4.0 之前虽然我们说 Redis 是单线程，也只是说它的网络 I/O 线程以及 Set 和 Get 操作是由一个线程完成的。但是 Redis 的持久化、集群同步还是使用其他线程来完成。</p><p>4.0 之后添加了多线程的支持，主要是体现在大数据的异步删除功能上，例如 unlink key、flushdb async、flushall async 等</p><p>面试官：回答的很好，<strong>那为什么 Redis 在 4.0 之前会选择使用单线程？而且使用单线程还那么快</strong>？</p><p>小二：</p><p>选择单线程个人觉得主要是使用简单，不存在锁竞争，可以在无锁的情况下完成所有操作，不存在死锁和线程切换带来的性能和时间上的开销，但同时单线程也不能完全发挥出多核 CPU 的性能。</p><p>至于为什么单线程那么快我觉得主要有以下几个原因：</p><ul><li>Redis 的大部分操作都在内存中完成，内存中的执行效率本身就很快，并且采用了高效的数据结构，比如哈希表和跳表。</li><li>使用单线程避免了多线程的竞争，省去了多线程切换带来的时间和性能开销，并且不会出现死锁。</li><li>采用 I/O 多路复用机制处理大量客户端的 Socket 请求，因为这是基于非阻塞的 I/O 模型，这就让 Redis 可以高效地进行网络通信，I/O 的读写流程也不再阻塞。</li></ul><p>面试官：不错，那 <strong>Redis 是如何实现数据不丢失的呢</strong>？</p><p>小二：</p><p>Redis 数据是存储在内存中的，为了保证 Redis 数据不丢失，那就要把数据从内存存储到磁盘上，以便在服务器重启后还能够从磁盘中恢复原有数据，这就是 Redis 的数据持久化。Redis 数据持久化有三种方式。</p><p><strong>1）AOF 日志（Append Only File，文件追加方式）</strong>：记录所有的操作命令，并以文本的形式追加到文件中。</p><p><strong>2）RDB 快照（Redis DataBase）</strong>：将某一个时刻的内存数据，以二进制的方式写入磁盘。</p><p><strong>3）混合持久化方式</strong>：Redis 4.0 新增了混合持久化的方式，集成了 RDB 和 AOF 的优点。</p><p>面试官：那你分别说说 <strong>AOF 和 RDB 的实现原理</strong>吧。</p><p>小二：</p><p>AOF 采用的是写后日志的方式，Redis 先执行命令把数据写入内存，然后再记录日志到文件中。AOF 日志记录的是操作命令，不是实际的数据，如果采用 AOF 方法做故障恢复时需要将全量日志都执行一遍。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mianjing/redis12question-1.png" alt=""></p><p>RDB 采用的是内存快照的方式，它记录的是某一时刻的数据，而不是操作，所以采用 RDB 方法做故障恢复时只需要直接把 RDB 文件读入内存即可，实现快速恢复。</p><p>面试官：你刚提到了 AOF 采用的是 “写后日志” 的方式，我们平时用的 MySQL 则采用的是 “写前日志”，那 <strong>Redis 为什么要先执行命令，再把数据写入日志呢</strong>？</p><p>小二：这个主要是由于 Redis 在写入日志之前，不对命令进行语法检查，所以只记录执行成功的命令，避免出现记录错误命令的情况，而且在命令执行后再写日志不会阻塞当前的写操作。</p><p>面试官：<strong>那后写日志又有什么风险呢</strong>？</p><p>小二：我... 这个我不会。</p><p>面试官：</p><p>好吧，后写日志主要有两个风险可能会发生：</p><ul><li><strong>数据可能会丢失</strong>：如果 Redis 刚执行完命令，此时发生故障宕机，会导致这条命令存在丢失的风险。</li><li><strong>可能阻塞其他操作</strong>：AOF 日志其实也是在主线程中执行，所以当 Redis 把日志文件写入磁盘的时候，还是会阻塞后续的操作无法执行。</li></ul><p>我还有个问题是 <strong>RDB 做快照时会阻塞线程吗</strong>？</p><p>小二：Redis 提供了两个命令来生成 RDB 快照文件，分别是 save 和 bgsave。save 命令在主线程中执行，会导致阻塞。而 bgsave 命令则会创建一个子进程，用于写入 RDB 文件的操作，避免了对主线程的阻塞，这也是 Redis RDB 的默认配置。</p><p>面试官：<strong>RDB 做快照的时候数据能修改吗</strong>？</p><p>小二：save 是同步的会阻塞客户端命令，bgsave 的时候是可以修改的。</p><p>面试官：那 Redis 是<strong>怎么解决在 bgsave 做快照的时候允许数据修改呢</strong>？</p><p>小二：额，这个我不太清楚...</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mianjing/redis12question-2.png" alt=""></p><p>面试官：</p><p>这里主要是利用 bgsave 的子线程实现的，具体操作如下：</p><ul><li>如果主线程执行读操作，则主线程和 bgsave 子进程互相不影响；</li><li>如果主线程执行写操作，则被修改的数据会复制一份副本，然后 bgsave 子进程会把该副本数据写入 RDB 文件，在这个过程中，主线程仍然可以直接修改原来的数据。</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mianjing/redis12question-3.png" alt=""></p><p>要注意，Redis 对 RDB 的执行频率非常重要，因为这会影响快照数据的完整性以及 Redis 的稳定性，所以在 Redis 4.0 后，增加了 AOF 和 RDB 混合的数据持久化机制： 把数据以 RDB 的方式写入文件，再将后续的操作命令以 AOF 的格式存入文件，既保证了 Redis 重启速度，又降低数据丢失风险。</p><p>小二：学到了学到了。</p><p>面试官：那你再跟我说说 <strong>Redis 如何实现高可用</strong>吧？</p><p>小二：Redis 实现高可用主要有三种方式：主从复制、哨兵模式，以及 Redis 集群。</p><p><strong>1）主从复制</strong></p><p>将从前的一台 Redis 服务器，同步数据到多台从 Redis 服务器上，即一主多从的模式，这个跟 MySQL 主从复制的原理一样。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mianjing/redis12question-4.png" alt=""></p><p><strong>2）哨兵模式</strong></p><p>使用 Redis 主从服务的时候，会有一个问题，就是当 Redis 的主从服务器出现故障宕机时，需要手动进行恢复，为了解决这个问题，Redis 增加了哨兵模式（因为哨兵模式做到了可以监控主从服务器，并且提供自动容灾恢复的功能）。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mianjing/redis12question-5.png" alt=""></p><p><strong>3）Redis Cluster（集群）</strong></p><p>Redis Cluster 是一种分布式去中心化的运行模式，是在 Redis 3.0 版本中推出的 Redis 集群方案，它将数据分布在不同的服务器上，以此来降低系统对单主节点的依赖，从而提高 Redis 服务的读写性能。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mianjing/redis12question-6.png" alt=""></p><p>面试官：使用哨兵模式在数据上有副本数据做保证，在可用性上又有哨兵监控，一旦 master 宕机会选举 salve 节点为 master 节点，这种已经满足了我们的生产环境需要，<strong>那为什么还需要使用集群模式呢</strong>？</p><p>小二：哨兵模式归根节点还是主从模式，在主从模式下我们可以通过增加 salve 节点来扩展读并发能力，但是没办法扩展写能力和存储能力，存储能力只能是 master 节点能够承载的上限。所以为了扩展写能力和存储能力，我们就需要引入集群模式。</p><p>面试官：集群中那么多 Master 节点，<strong>Redis Cluster 在存储的时候如何确定选择哪个节点呢</strong>？</p><p>小二：这应该是使用了某种 hash 算法，但是我不太清楚。。。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mianjing/redis12question-7.png" alt=""></p><p>面试官：那好，今天的面试就到这里吧，你先回去等我们的面试通知。</p><p>小二：好的，谢谢面试官，你能告诉我 Redis Cluster 怎么实现节点选择的吗？</p><p>面试官：</p><p>Redis Cluster 采用的是类一致性哈希算法实现节点选择的，至于什么是一致性哈希算法你自己回去看看。</p><p>Redis Cluster 将自己分成了 16384 个 Slot（槽位），哈希槽类似于数据分区，每个键值对都会根据它的 key，被映射到一个哈希槽中，具体执行过程分为两大步。</p><p>1）根据键值对的 key，按照 CRC16 算法计算一个 16 bit 的值。</p><p>2）再用 16bit 值对 16384 取模，得到 0~16383 范围内的模数，每个模数代表一个相应编号的哈希槽。</p><p>每个 Redis 节点负责处理一部分槽位，假如你有三个 master 节点 ABC，每个节点负责的槽位如下：</p><table><thead><tr><th>节点</th><th>处理槽位</th></tr></thead><tbody><tr><td>A</td><td>0-5000</td></tr><tr><td>B</td><td>5001 - 10000</td></tr><tr><td>C</td><td>10001 - 16383</td></tr></tbody></table><p>这样就实现了 cluster 节点的选择。</p><hr><p>文章来源于JAVA日知录 ，作者飘渺Jam 转载链接：https://mp.weixin.qq.com/s/GFUHslsSm96fJbhsCkFe_w</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer 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height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><p>大家好，我是二哥呀！春招即将到来，祝参加面试的小伙伴都能顺利拿到满意的 offer!</p><p>为了给小伙伴们一点点帮助和启发，我也会分享一些比较有价值的读者面经，这是一篇来自一位老读者的硬核春招面经分享。内容包括：</p><ul><li>基本情况（学校、offer 情况......）</li><li>为什么选择互联网行业研发岗</li><li>学习 Java 开发的经验总结</li><li>学习方法和心态上的建议</li><li>读研相关</li></ul><hr><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mianjing/shanganaliyun-1.png" alt=""></p><p>我的昵称是风，来自浙江舟山，南航读研，武大本科，专业是计算机。</p><p><em>二哥 : 本硕都是名校！TQL！光这一点就领先了大部分求职者</em>。</p><p>考研结束选择了 Java 开发岗作为工作，在研究生阶段选择放养型的导师，因此有大量空闲时间 面向就业学习 ，系统地学习了很多遍基础知识，刷了很多遍算法题。跟着教程做了一个论坛类网站的项目，在参加的学生俱乐部里接到学校老师手上的一个安防类的上线项目，做的 Java 后端工作。偶尔自己在个人网站写博客，在校也通过了 CET6，科研做了一个任务调度算法研究。</p><p>春招两个月面试了多家头部互联网公司的 Java 开发岗，并收获 深圳腾讯 PCG 和 杭州阿里云 的 offer。我选择了后者，因为杭州这个城市更加适合我。今年这两家实习 hc 增加了巨多，也就意味着面试难度降低，并且实习工资也有明显上升。个人分析是后疫情时代恢复经济发展，公司进行业务扩张，对人才的需求要比往年高。算是幸运地吃到了大局势的红利。</p><h3 id="一、岗位选择" tabindex="-1"><a class="header-anchor" href="#一、岗位选择" aria-hidden="true">#</a> 一、岗位选择</h3><blockquote><p>为什么选择 CS？</p></blockquote><p>引用李智慧前辈《大型网站技术架构》一书的后记部分对于互联网的描述：</p><blockquote><p>互联网没有门槛，谁都可以进来玩，但是进来后，最好把那些陈旧的思想和包袱放下，重新来过。<br><br> 互联网是一个开放和分享的世界，这里是创新者的乐园，探险者的处女地。只要你努力，富有想象力和聪明才智，能为用户创造价值，能推动社会进步，不管你开始时多么弱小，总有机会迅速聚集资金、人才和注意力，在很短的时间内发展壮大。<br><br> 互联网是一种精神，一种开放、分享、自由的精神；越是付出不问回报，越是获得丰厚的回报；越是不设边界，越是拥有整个世界。互联网是一种颠覆，打碎所有的藩篱，给所有人平等表达和获取的机会，每个人都可以发出自己的声音。互联网是一种建设，重塑人们的思维方式和社会运行方式，建设一个人和人彼此理解信任的大同世界。<br><br> 互联网正在并将继续改变这个世界，一切才刚刚开始，你我正生逢其时！</p></blockquote><p>我认为身处在互联网时代，拥有信息即拥有了一切。积极拥抱变化，使用计算机技术改变世界，提高生产力，推动人类进步，是极具价值的事业。这份理想也是我前进的动力。加油，技术人！</p><blockquote><p>为什么选择 Java 开发?</p></blockquote><p>我个人觉得研发工程师这个职业，能够用自己的代码，创造程序，最终形成实实在在的产品，很有成就感。</p><p>在工程项目开发的过程中，程序员就是某个功能的主人，用各种代码实现，我很享受这个创造的过程。引用我腾讯一面时面试官的观点：后端开发岗做的事就是解决业务问题，重要的是做选择，选择最适合业务的技术。</p><p>现实层面，Java 开发市面上的占有率高，大多数业务开发使用 Java，意味着岗位数量多。同时，Java 学习资源多，社区活跃，便于学习。另外，Java 有成熟的一套体系，技术栈完整，市面上现有业务对 Java 的依赖度高。</p><p>Guide 哥 : 目前，虽然有各种编程语言异军突起，但是 Java 庞大的生态在企业开发领域还是很难被撼动的！并且， Java 自身也在越来越好！</p><h3 id="学习经历" tabindex="-1"><a class="header-anchor" href="#学习经历" aria-hidden="true">#</a> 学习经历</h3><blockquote><p>幸运又迷茫的开始</p></blockquote><p>我开始面向就业学习计算机知识，是在本科室友的推荐下，找到了 CS-Notes 这个 GitHub 仓库，从此开启了新世界的大门。</p><p>室友还同时推荐我找 Java 开发岗的工作，相对他找的 C++要简单不少。室友还推荐我多刷算法题，推荐我使用 MacBook 提高学习效率。有一位好友作为引路人，真的非常幸运。</p><p>迷茫是在我进入到一些社区和学习交流群中，面对海量的学习资源和各种言论，觉得很难甄别出优质的信息。因为缺乏经验，产生的问题一直堆积，无法顺利解决问题的失落感，甚至一度让我对学习产生排斥。当时还是安慰自己车到山前必有路，坚持坚持还是坚持，努力提高自己眼界，并及时清理自己的负面情绪。</p><blockquote><p>能力稳定提升的阶段</p></blockquote><p>后来，在 GitHub 上找到了 JavaGuide，个人认为是 Java 领域整理最全面的一个仓库，我系统地学到了学习路径，学习方法，作为程序员应该具有的良好习惯等等。我还关注了二哥的公众号，看了许许多多二哥原创的优质文章。</p><p>进入研究生阶段后，在实验室，学生俱乐部，各种活动比赛，公司的宣讲会等，都能学到很多东西，认识很多朋友。我认为有志同道合的朋友一起学习，互相查漏补缺，帮忙解决问题，相对我之前的自学，效率上要提高不少。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mianjing/shanganaliyun-2.png" alt=""></p><p>在了解到项目在面试中占据比较重要的位置，我会在学习完理论知识后，尽量用代码实践。在自己学习项目视频教程，并跟着手打过后，我参与到学校老师手下的一个上线项目，真正用技术解决实际问题。</p><blockquote><p>春招面试阶段</p></blockquote><p>虽然学习开始就目标对准找工作，但是没有实际面试经验，还是让我对于能取得怎么 offer 大大存疑。开始面试前我也做好了拿到不满意 offer 的心理准备，在投简历上也尽量海投，争取多一些面试机会。</p><p>最先接到的来自阿里数据库部门的提前批电话面试，我当时还处于刚开始复习之前学习内容的阶段，而且面对的是阿里，自然是相当的不自信。我还是咬咬牙上了，硬着头皮面了 85 分钟，被面试官疯狂质疑项目中很细节的点，当时也是受到了很大打击。不过好在我没有很大期望，而且做了被吊打的准备，其实在对自身面试经验的增长上，还是利大于弊的，毕竟后续也没有其他面试能比这次更加打击到我了：）。</p><p>随后正式批开始，陆续面了腾讯 PCG，美团，网易互联网，字节，阿里这几家头部大厂。腾讯的面试经历给了我莫大的鼓励，我感到非常幸运能够得到腾讯的认可，特别感谢一面面试官，在线下面试中给予我的肯定，以及对于在后端开发方向上的教导。从腾讯一面，到 oc，总共 6 天，而且我笔试 0ac 也顺利通过，不得不说腾讯今年 hc 之多，难度之低，流程之快。相对实验室其他同学，我 3.22 就上岸腾讯，我后续的复习和面试轻松了很多。</p><p>重点聊下网易，我是 hr 面后拖了 20 天，然后挂了，原因是需要横向对比，优先录取更优秀的同学。实习招聘就有这种情况，秋招的战场恐怕更加残酷，因此我建议有精力、准备尚可的同学，在 7 8 月的提前批就尽早投递简历，给自己多些机会和选择的空间。</p><p>在 3 月底挂了阿里 AE 部门后，4 月中旬开始再度挑战阿里云全球技术服务部，这也是我这次春招最后一个部门的面试。只能说在经历多个大厂的面试洗礼后，我也能比较游刃有余地通过阿里的面试，而且相对于网易，在最后排序录取环节，我幸运地收到 offer。在 5.10，我的春招也终于以意外满意的结局结束。</p><p>最后总结下我对投递部门的建议 ：一定要加上部门内部前辈的联系方式，及时询问面试反馈和进度。同时要加部门的招聘群，或者交流群，及时了解政策变动，其他同学是否收到面试通知乃至 offer 等，这些信息非常重要。</p><h3 id="学习方法的建议" tabindex="-1"><a class="header-anchor" href="#学习方法的建议" aria-hidden="true">#</a> 学习方法的建议</h3><ul><li>弗曼学习法。</li><li>注意效率，速度要快。</li><li>注意将理论知识，用代码实践。</li><li>每日每周每月初，规划学习的内容。</li><li>给需要学习的内容清楚障碍，专注到一块内容上，并保证学习的连续性。</li><li>多联想相关的知识点，提高知识迁移能力。</li><li>勤做笔记，注意总结和回顾。</li></ul><h3 id="心态的建议" tabindex="-1"><a class="header-anchor" href="#心态的建议" aria-hidden="true">#</a> 心态的建议</h3><ul><li>要警惕网上或者身边人所贩卖的焦虑。</li><li>取得进步需要每天前进在正确的方向，并且尽自己最大的努力。</li><li>对待自身现状要实事求是。现在实力不够也不用灰心，只能说明还没到最后，最后都会有光明的未来。</li><li>心急吃不了热豆腐，一步一个脚印，踏踏实实地做事。</li></ul><h3 id="关于读研" tabindex="-1"><a class="header-anchor" href="#关于读研" aria-hidden="true">#</a> 关于读研</h3><p>我本人是强烈推荐各位本科同学读研。</p><blockquote><p>为什么呢？</p></blockquote><ul><li><strong>读研期间会有大量的时间</strong> ：个人认为，像我一样的多数同学，在经历以高考分数为目标的应试教育后，本科阶段面对全新的专业知识和学习环境，以及来自互联网和身边各种信息，感到自由且迷茫。这很正常，我们需要的是时间去找到合适的方向，形成有效的学习方法。</li><li><strong>更多的机会</strong> ：考研有机会进入更好的学校，选择更适合的专业。眼界的提升，结交更优质的人脉也很重要，提高未来发展的上限。好的导师能够提供好的研究方向，好的项目，帮助指导科研。甚至能推荐工作和读博深造。</li><li><strong>简历加分</strong> ：互联网行业的发展速度在减缓，但从业人员增速依旧，意味着更加激烈的竞争。更高的学历，更强的专业能力，已经成为企业对候选人的要求。</li><li><strong>科研内容对能力的培养</strong> : 科研主要是对算法的学习和创新，能培养设计能力。对于论文的研究，培养理解能力和外文的阅读能力。这些能力都有助于未来，把工作做得更加出色。</li></ul><p>二哥 : 比较中肯的建议！不过，也不要忽略不读研带来的几年工作经验对自己的收益。是否读研，根据自身情况做选择即可！</p><h3 id="总结" tabindex="-1"><a class="header-anchor" href="#总结" aria-hidden="true">#</a> 总结</h3><p>不忘初心，砥砺前行。愿大家学业进步。祝各位秋招取得好成绩!</p><hr><p><em>没有什么使我停留——除了目的，纵然岸旁有玫瑰、有绿荫、有宁静的港湾，我是不系之舟</em>。</p><p>转载链接：<a href="https://mp.weixin.qq.com/s/EB_NCC2fNyYHuz04k1H4Nw" target="_blank" rel="noopener noreferrer">https://mp.weixin.qq.com/s/EB_NCC2fNyYHuz04k1H4Nw<span><svg 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class="router-link-active router-link-exact-active toc-link level3">一、岗位选择</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/mianjing/shanganaliyun.html#学习经历" class="router-link-active router-link-exact-active toc-link level3">学习经历</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/mianjing/shanganaliyun.html#学习方法的建议" class="router-link-active router-link-exact-active toc-link level3">学习方法的建议</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/mianjing/shanganaliyun.html#心态的建议" class="router-link-active router-link-exact-active toc-link level3">心态的建议</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/mianjing/shanganaliyun.html#关于读研" class="router-link-active router-link-exact-active toc-link level3">关于读研</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/mianjing/shanganaliyun.html#总结" class="router-link-active router-link-exact-active toc-link level3">总结</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="春招斩获深圳腾讯pcg和杭州阿里云" tabindex="-1"><a class="header-anchor" href="#春招斩获深圳腾讯pcg和杭州阿里云" aria-hidden="true">#</a> 春招斩获深圳腾讯PCG和杭州阿里云</h1><p>转载链接：<a href="https://mp.weixin.qq.com/s/EB_NCC2fNyYHuz04k1H4Nw" target="_blank" rel="noopener noreferrer">https://mp.weixin.qq.com/s/EB_NCC2fNyYHuz04k1H4Nw<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><p>大家好，我是二哥呀！春招即将到来，祝参加面试的小伙伴都能顺利拿到满意的 offer!</p><p>为了给小伙伴们一点点帮助和启发，我也会分享一些比较有价值的读者面经，这是一篇来自一位老读者的硬核春招面经分享。内容包括：</p><ul><li>基本情况（学校、offer 情况......）</li><li>为什么选择互联网行业研发岗</li><li>学习 Java 开发的经验总结</li><li>学习方法和心态上的建议</li><li>读研相关</li></ul><hr><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mianjing/shanganaliyun-1.png" alt=""></p><p>我的昵称是风，来自浙江舟山，南航读研，武大本科，专业是计算机。</p><p><em>二哥 : 本硕都是名校！TQL！光这一点就领先了大部分求职者</em>。</p><p>考研结束选择了 Java 开发岗作为工作，在研究生阶段选择放养型的导师，因此有大量空闲时间 面向就业学习 ，系统地学习了很多遍基础知识，刷了很多遍算法题。跟着教程做了一个论坛类网站的项目，在参加的学生俱乐部里接到学校老师手上的一个安防类的上线项目，做的 Java 后端工作。偶尔自己在个人网站写博客，在校也通过了 CET6，科研做了一个任务调度算法研究。</p><p>春招两个月面试了多家头部互联网公司的 Java 开发岗，并收获 深圳腾讯 PCG 和 杭州阿里云 的 offer。我选择了后者，因为杭州这个城市更加适合我。今年这两家实习 hc 增加了巨多，也就意味着面试难度降低，并且实习工资也有明显上升。个人分析是后疫情时代恢复经济发展，公司进行业务扩张，对人才的需求要比往年高。算是幸运地吃到了大局势的红利。</p><h3 id="一、岗位选择" tabindex="-1"><a class="header-anchor" href="#一、岗位选择" aria-hidden="true">#</a> 一、岗位选择</h3><blockquote><p>为什么选择 CS？</p></blockquote><p>引用李智慧前辈《大型网站技术架构》一书的后记部分对于互联网的描述：</p><blockquote><p>互联网没有门槛，谁都可以进来玩，但是进来后，最好把那些陈旧的思想和包袱放下，重新来过。<br><br> 互联网是一个开放和分享的世界，这里是创新者的乐园，探险者的处女地。只要你努力，富有想象力和聪明才智，能为用户创造价值，能推动社会进步，不管你开始时多么弱小，总有机会迅速聚集资金、人才和注意力，在很短的时间内发展壮大。<br><br> 互联网是一种精神，一种开放、分享、自由的精神；越是付出不问回报，越是获得丰厚的回报；越是不设边界，越是拥有整个世界。互联网是一种颠覆，打碎所有的藩篱，给所有人平等表达和获取的机会，每个人都可以发出自己的声音。互联网是一种建设，重塑人们的思维方式和社会运行方式，建设一个人和人彼此理解信任的大同世界。<br><br> 互联网正在并将继续改变这个世界，一切才刚刚开始，你我正生逢其时！</p></blockquote><p>我认为身处在互联网时代，拥有信息即拥有了一切。积极拥抱变化，使用计算机技术改变世界，提高生产力，推动人类进步，是极具价值的事业。这份理想也是我前进的动力。加油，技术人！</p><blockquote><p>为什么选择 Java 开发?</p></blockquote><p>我个人觉得研发工程师这个职业，能够用自己的代码，创造程序，最终形成实实在在的产品，很有成就感。</p><p>在工程项目开发的过程中，程序员就是某个功能的主人，用各种代码实现，我很享受这个创造的过程。引用我腾讯一面时面试官的观点：后端开发岗做的事就是解决业务问题，重要的是做选择，选择最适合业务的技术。</p><p>现实层面，Java 开发市面上的占有率高，大多数业务开发使用 Java，意味着岗位数量多。同时，Java 学习资源多，社区活跃，便于学习。另外，Java 有成熟的一套体系，技术栈完整，市面上现有业务对 Java 的依赖度高。</p><p>Guide 哥 : 目前，虽然有各种编程语言异军突起，但是 Java 庞大的生态在企业开发领域还是很难被撼动的！并且， Java 自身也在越来越好！</p><h3 id="学习经历" tabindex="-1"><a class="header-anchor" href="#学习经历" aria-hidden="true">#</a> 学习经历</h3><blockquote><p>幸运又迷茫的开始</p></blockquote><p>我开始面向就业学习计算机知识，是在本科室友的推荐下，找到了 CS-Notes 这个 GitHub 仓库，从此开启了新世界的大门。</p><p>室友还同时推荐我找 Java 开发岗的工作，相对他找的 C++要简单不少。室友还推荐我多刷算法题，推荐我使用 MacBook 提高学习效率。有一位好友作为引路人，真的非常幸运。</p><p>迷茫是在我进入到一些社区和学习交流群中，面对海量的学习资源和各种言论，觉得很难甄别出优质的信息。因为缺乏经验，产生的问题一直堆积，无法顺利解决问题的失落感，甚至一度让我对学习产生排斥。当时还是安慰自己车到山前必有路，坚持坚持还是坚持，努力提高自己眼界，并及时清理自己的负面情绪。</p><blockquote><p>能力稳定提升的阶段</p></blockquote><p>后来，在 GitHub 上找到了 JavaGuide，个人认为是 Java 领域整理最全面的一个仓库，我系统地学到了学习路径，学习方法，作为程序员应该具有的良好习惯等等。我还关注了二哥的公众号，看了许许多多二哥原创的优质文章。</p><p>进入研究生阶段后，在实验室，学生俱乐部，各种活动比赛，公司的宣讲会等，都能学到很多东西，认识很多朋友。我认为有志同道合的朋友一起学习，互相查漏补缺，帮忙解决问题，相对我之前的自学，效率上要提高不少。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mianjing/shanganaliyun-2.png" alt=""></p><p>在了解到项目在面试中占据比较重要的位置，我会在学习完理论知识后，尽量用代码实践。在自己学习项目视频教程，并跟着手打过后，我参与到学校老师手下的一个上线项目，真正用技术解决实际问题。</p><blockquote><p>春招面试阶段</p></blockquote><p>虽然学习开始就目标对准找工作，但是没有实际面试经验，还是让我对于能取得怎么 offer 大大存疑。开始面试前我也做好了拿到不满意 offer 的心理准备，在投简历上也尽量海投，争取多一些面试机会。</p><p>最先接到的来自阿里数据库部门的提前批电话面试，我当时还处于刚开始复习之前学习内容的阶段，而且面对的是阿里，自然是相当的不自信。我还是咬咬牙上了，硬着头皮面了 85 分钟，被面试官疯狂质疑项目中很细节的点，当时也是受到了很大打击。不过好在我没有很大期望，而且做了被吊打的准备，其实在对自身面试经验的增长上，还是利大于弊的，毕竟后续也没有其他面试能比这次更加打击到我了：）。</p><p>随后正式批开始，陆续面了腾讯 PCG，美团，网易互联网，字节，阿里这几家头部大厂。腾讯的面试经历给了我莫大的鼓励，我感到非常幸运能够得到腾讯的认可，特别感谢一面面试官，在线下面试中给予我的肯定，以及对于在后端开发方向上的教导。从腾讯一面，到 oc，总共 6 天，而且我笔试 0ac 也顺利通过，不得不说腾讯今年 hc 之多，难度之低，流程之快。相对实验室其他同学，我 3.22 就上岸腾讯，我后续的复习和面试轻松了很多。</p><p>重点聊下网易，我是 hr 面后拖了 20 天，然后挂了，原因是需要横向对比，优先录取更优秀的同学。实习招聘就有这种情况，秋招的战场恐怕更加残酷，因此我建议有精力、准备尚可的同学，在 7 8 月的提前批就尽早投递简历，给自己多些机会和选择的空间。</p><p>在 3 月底挂了阿里 AE 部门后，4 月中旬开始再度挑战阿里云全球技术服务部，这也是我这次春招最后一个部门的面试。只能说在经历多个大厂的面试洗礼后，我也能比较游刃有余地通过阿里的面试，而且相对于网易，在最后排序录取环节，我幸运地收到 offer。在 5.10，我的春招也终于以意外满意的结局结束。</p><p>最后总结下我对投递部门的建议 ：一定要加上部门内部前辈的联系方式，及时询问面试反馈和进度。同时要加部门的招聘群，或者交流群，及时了解政策变动，其他同学是否收到面试通知乃至 offer 等，这些信息非常重要。</p><h3 id="学习方法的建议" tabindex="-1"><a class="header-anchor" href="#学习方法的建议" aria-hidden="true">#</a> 学习方法的建议</h3><ul><li>弗曼学习法。</li><li>注意效率，速度要快。</li><li>注意将理论知识，用代码实践。</li><li>每日每周每月初，规划学习的内容。</li><li>给需要学习的内容清楚障碍，专注到一块内容上，并保证学习的连续性。</li><li>多联想相关的知识点，提高知识迁移能力。</li><li>勤做笔记，注意总结和回顾。</li></ul><h3 id="心态的建议" tabindex="-1"><a class="header-anchor" href="#心态的建议" aria-hidden="true">#</a> 心态的建议</h3><ul><li>要警惕网上或者身边人所贩卖的焦虑。</li><li>取得进步需要每天前进在正确的方向，并且尽自己最大的努力。</li><li>对待自身现状要实事求是。现在实力不够也不用灰心，只能说明还没到最后，最后都会有光明的未来。</li><li>心急吃不了热豆腐，一步一个脚印，踏踏实实地做事。</li></ul><h3 id="关于读研" tabindex="-1"><a class="header-anchor" href="#关于读研" aria-hidden="true">#</a> 关于读研</h3><p>我本人是强烈推荐各位本科同学读研。</p><blockquote><p>为什么呢？</p></blockquote><ul><li><strong>读研期间会有大量的时间</strong> ：个人认为，像我一样的多数同学，在经历以高考分数为目标的应试教育后，本科阶段面对全新的专业知识和学习环境，以及来自互联网和身边各种信息，感到自由且迷茫。这很正常，我们需要的是时间去找到合适的方向，形成有效的学习方法。</li><li><strong>更多的机会</strong> ：考研有机会进入更好的学校，选择更适合的专业。眼界的提升，结交更优质的人脉也很重要，提高未来发展的上限。好的导师能够提供好的研究方向，好的项目，帮助指导科研。甚至能推荐工作和读博深造。</li><li><strong>简历加分</strong> ：互联网行业的发展速度在减缓，但从业人员增速依旧，意味着更加激烈的竞争。更高的学历，更强的专业能力，已经成为企业对候选人的要求。</li><li><strong>科研内容对能力的培养</strong> : 科研主要是对算法的学习和创新，能培养设计能力。对于论文的研究，培养理解能力和外文的阅读能力。这些能力都有助于未来，把工作做得更加出色。</li></ul><p>二哥 : 比较中肯的建议！不过，也不要忽略不读研带来的几年工作经验对自己的收益。是否读研，根据自身情况做选择即可！</p><h3 id="总结" tabindex="-1"><a class="header-anchor" href="#总结" aria-hidden="true">#</a> 总结</h3><p>不忘初心，砥砺前行。愿大家学业进步。祝各位秋招取得好成绩!</p><hr><p><em>没有什么使我停留——除了目的，纵然岸旁有玫瑰、有绿荫、有宁静的港湾，我是不系之舟</em>。</p><p>转载链接：<a href="https://mp.weixin.qq.com/s/EB_NCC2fNyYHuz04k1H4Nw" target="_blank" rel="noopener noreferrer">https://mp.weixin.qq.com/s/EB_NCC2fNyYHuz04k1H4Nw<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 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class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->微服务网关：从对比到选型，由理论到实践</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" 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33.145 0 01-33.472 33.473z"></path></svg><span>2022年5月21日</span><meta property="datePublished" content="2022-05-21T00:14:16.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category5" role>Java企业级开发</li><meta property="articleSection" content="Java企业级开发"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag1" role>微服务网关</li></ul><meta property="keywords" content="微服务网关"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 17 分钟</span><meta property="timeRequired" content="PT17M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/microservice/api-wangguan.html#api网关基础" class="router-link-active router-link-exact-active toc-link level2">API网关基础</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/microservice/api-wangguan.html#什么是api网关" class="router-link-active router-link-exact-active toc-link level3">什么是API网关</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/microservice/api-wangguan.html#网关的主要功能" class="router-link-active router-link-exact-active toc-link level3">网关的主要功能</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/microservice/api-wangguan.html#api网关选型" class="router-link-active router-link-exact-active toc-link level2">API网关选型</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/microservice/api-wangguan.html#常用api网关" class="router-link-active router-link-exact-active toc-link level3">常用API网关</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/microservice/api-wangguan.html#api网关对比" class="router-link-active router-link-exact-active toc-link level3">API网关对比</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/microservice/api-wangguan.html#基于traefik自研的微服务网关" class="router-link-active router-link-exact-active toc-link level2">基于Traefik自研的微服务网关</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/microservice/api-wangguan.html#技术栈选型" class="router-link-active router-link-exact-active toc-link level3">技术栈选型</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/microservice/api-wangguan.html#网关框架" class="router-link-active router-link-exact-active toc-link level3">网关框架</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/microservice/api-wangguan.html#网关后台" class="router-link-active router-link-exact-active toc-link level3">网关后台</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/microservice/api-wangguan.html#协议转换模块" class="router-link-active router-link-exact-active toc-link level3">协议转换模块</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><blockquote><p>整理：沉默王二，戳<a href="https://mp.weixin.qq.com/s/b2xf4GiJksBQqjHVpsh49Q" target="_blank" rel="noopener noreferrer">转载链接<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，作者：楼仔，戳<a href="https://mp.weixin.qq.com/s/0Qupyl5eCyQGFEAIY6GxoQ" target="_blank" rel="noopener noreferrer">原文链接<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>。</p></blockquote><p>微服务近几年非常火，围绕微服务的技术生态也比较多，比如微服务网关、Docker、Kubernetes等。</p><p>我是于2019年开始接触微服务网关，当时和公司的一位同事一起开发，由于技术能力有限，我只负责网关后台，后续微服务网关的迭代，我其实没有参与，不过后来抽空看了微服务网关前台的代码，所以对这套微服务网关的实现原理算是基本掌握。</p><p>最近在写技术栈相关的文章，刚好写到微服务网关，就把之前学习的知识进行简单总结，同时也把市面上常用的微服务网关进行梳理，一方面便于后续技术选型，另一方面也算是给自己一个交代。下面是文章目录：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-f910e9f2-0374-4afb-aef0-3ea47c9b7f67.png" alt=""></p><h2 id="api网关基础" tabindex="-1"><a class="header-anchor" href="#api网关基础" aria-hidden="true">#</a> API网关基础</h2><h3 id="什么是api网关" tabindex="-1"><a class="header-anchor" href="#什么是api网关" aria-hidden="true">#</a> 什么是API网关</h3><p><strong>API网关是一个服务器，是系统的唯一入口。</strong> 从面向对象设计的角度看，它与外观模式类似。</p><p>API网关封装了系统内部架构，为每个客户端提供一个定制的API。它可能还具有其它职责，如身份验证、监控、负载均衡、缓存、协议转换、限流熔断、静态响应处理。</p><p><strong>API网关方式的核心要点是，所有的客户端和消费端都通过统一的网关接入微服务</strong>，在网关层处理所有的非业务功能。通常，网关也是提供REST/HTTP的访问API。</p><h3 id="网关的主要功能" tabindex="-1"><a class="header-anchor" href="#网关的主要功能" aria-hidden="true">#</a> 网关的主要功能</h3><p>微服务网关作为微服务后端服务的统一入口，它可以统筹管理后端服务，主要分为数据平面和控制平面：</p><ul><li>数据平面主要功能是接入用户的HTTP请求和微服务被拆分后的聚合。使用微服务网关统一对外暴露后端服务的API和契约，路由和过滤功能正是网关的核心能力模块。另外，微服务网关可以实现拦截机制和专注跨横切面的功能，包括协议转换、安全认证、熔断限流、灰度发布、日志管理、流量监控等。</li><li>控制平面主要功能是对后端服务做统一的管控和配置管理。例如，可以控制网关的弹性伸缩；可以统一下发配置；可以对网关服务添加标签；可以在微服务网关上通过配置Swagger功能统一将后端服务的API契约暴露给使用方，完成文档服务，提高工作效率和降低沟通成本。</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-f6ea867d-ffdf-4da2-a89d-fccbe6326110.png" alt=""></p><ul><li><strong>路由功能</strong>：路由是微服务网关的核心能力。通过路由功能微服务网关可以将请求转发到目标微服务。在微服务架构中，网关可以结合注册中心的动态服务发现，实现对后端服务的发现，调用方只需要知道网关对外暴露的服务API就可以透明地访问后端微服务。</li><li><strong>负载均衡</strong>：API网关结合负载均衡技术，利用Eureka或者Consul等服务发现工具，通过轮询、指定权重、IP地址哈希等机制实现下游服务的负载均衡。</li><li><strong>统一鉴权</strong>：一般而言，无论对内网还是外网的接口都需要做用户身份认证，而用户认证在一些规模较大的系统中都会采用统一的单点登录（Single Sign On）系统，如果每个微服务都要对接单点登录系统，那么显然比较浪费资源且开发效率低。API网关是统一管理安全性的绝佳场所，可以将认证的部分抽取到网关层，微服务系统无须关注认证的逻辑，只关注自身业务即可。</li><li><strong>协议转换</strong>：API网关的一大作用在于构建异构系统，API网关作为单一入口，通过协议转换整合后台基于REST、AMQP、Dubbo等不同风格和实现技术的微服务，面向Web Mobile、开放平台等特定客户端提供统一服务。</li><li><strong>指标监控</strong>：网关可以统计后端服务的请求次数，并且可以实时地更新当前的流量健康状态，可以对URL粒度的服务进行延迟统计，也可以使用Hystrix Dashboard查看后端服务的流量状态及是否有熔断发生。</li><li><strong>限流熔断</strong>：在某些场景下需要控制客户端的访问次数和访问频率，一些高并发系统有时还会有限流的需求。在网关上可以配置一个阈值，当请求数超过阈值时就直接返回错误而不继续访问后台服务。当出现流量洪峰或者后端服务出现延迟或故障时，网关能够主动进行熔断，保护后端服务，并保持前端用户体验良好。</li><li><strong>黑白名单</strong>：微服务网关可以使用系统黑名单，过滤HTTP请求特征，拦截异常客户端的请求，例如DDoS攻击等侵蚀带宽或资源迫使服务中断等行为，可以在网关层面进行拦截过滤。比较常见的拦截策略是根据IP地址增加黑名单。在存在鉴权管理的路由服务中可以通过设置白名单跳过鉴权管理而直接访问后端服务资源。</li><li><strong>灰度发布</strong>：微服务网关可以根据HTTP请求中的特殊标记和后端服务列表元数据标识进行流量控制，实现在用户无感知的情况下完成灰度发布。</li><li><strong>流量染色</strong>：和灰度发布的原理相似，网关可以根据HTTP请求的Host、Head、Agent等标识对请求进行染色，有了网关的流量染色功能，我们可以对服务后续的调用链路进行跟踪，对服务延迟及服务运行状况进行进一步的链路分析。</li><li><strong>文档中心</strong>：网关结合Swagger，可以将后端的微服务暴露给网关，网关作为统一的入口给接口的使用方提供查看后端服务的API规范，不需要知道每一个后端微服务的Swagger地址，这样网关起到了对后端API聚合的效果。</li><li><strong>日志审计</strong>：微服务网关可以作为统一的日志记录和收集器，对服务URL粒度的日志请求信息和响应信息进行拦截。</li></ul><h2 id="api网关选型" tabindex="-1"><a class="header-anchor" href="#api网关选型" aria-hidden="true">#</a> API网关选型</h2><h3 id="常用api网关" tabindex="-1"><a class="header-anchor" href="#常用api网关" aria-hidden="true">#</a> 常用API网关</h3><p>先简单看一下市面上常用的API网关：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-ddaf1b1e-60b2-4cff-bab2-2b7b32f07f72.png" alt=""></p><h4 id="nginx" tabindex="-1"><a class="header-anchor" href="#nginx" aria-hidden="true">#</a> Nginx</h4><p>Nginx是一个高性能的HTTP和反向代理服务器。<strong>Nginx一方面可以做反向代理，另外一方面可以做静态资源服务器，接口使用Lua动态语言可以完成灵活的定制功能。</strong></p><p>Nginx 在启动后，会有一个 Master 进程和多个 Worker 进程，Master 进程和 Worker 进程之间是通过进程间通信进行交互的，如图所示。Worker 工作进程的阻塞点是在像 select()、epoll_wait() 等这样的 I/O 多路复用函数调用处，以等待发生数据可读 / 写事件。Nginx 采用了异步非阻塞的方式来处理请求，也就是说，Nginx 是可以同时处理成千上万个请求的。</p><h4 id="zuul" tabindex="-1"><a class="header-anchor" href="#zuul" aria-hidden="true">#</a> Zuul</h4><p>Zuul 是 Netflix 开源的一个API网关组件，它可以和 Eureka、Ribbon、Hystrix 等组件配合使用。社区活跃，融合于 SpringCloud 完整生态，是构建微服务体系前置网关服务的最佳选型之一。</p><p>Zuul 的核心是一系列的过滤器，这些过滤器可以完成以下功能：</p><ul><li><strong>统一鉴权 + 动态路由 + 负载均衡 + 压力测试</strong></li><li><strong>审查与监控</strong>：与边缘位置追踪有意义的数据和统计结果，从而带来精确的生产视图。</li><li><strong>多区域弹性</strong>：跨越 AWS Region 进行请求路由，旨在实现 ELB（Elastic Load Balancing，弹性负载均衡）使用的多样化，以及让系统的边缘更贴近系统的使用者。</li></ul><p>Zuul 目前有两个大的版本：<strong>Zuul1 和 Zuul2</strong></p><p>Zuul1 是基于 Servlet 框架构建，如图所示，采用的是阻塞和多线程方式，即一个线程处理一次连接请求，这种方式在内部延迟严重、设备故障较多情况下会引起存活的连接增多和线程增加的情况发生。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-93bef98d-7d71-48d1-943a-b8ede72432c8.png" alt=""></p><p>Netflix 发布的 Zuul2 有重大的更新，它运行在异步和无阻塞框架上，每个 CPU 核一个线程，处理所有的请求和响应，请求和响应的生命周期是通过事件和回调来处理的，这种方式减少了线程数量，因此开销较小。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-90dfae10-7cbd-4099-a5df-ea09a1435bc0.png" alt=""></p><h4 id="spring-cloud-getway" tabindex="-1"><a class="header-anchor" href="#spring-cloud-getway" aria-hidden="true">#</a> Spring Cloud GetWay</h4><p>Spring Cloud Gateway 是Spring Cloud的一个全新的API网关项目，目的是为了替换掉Zuul1，它基于Spring5.0 + SpringBoot2.0 + WebFlux（基于⾼性能的Reactor模式响应式通信框架Netty，异步⾮阻塞模型）等技术开发，性能⾼于Zuul，官⽅测试，<strong>Spring Cloud GateWay是Zuul的1.6倍</strong>，旨在为微服务架构提供⼀种简单有效的统⼀的API路由管理⽅式。</p><p>Spring Cloud Gateway可以与Spring Cloud Discovery Client（如Eureka）、Ribbon、Hystrix等组件配合使用，<strong>实现路由转发、负载均衡、熔断、鉴权、路径重写、⽇志监控等，并且Gateway还内置了限流过滤器，实现了限流的功能。</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-71c6dfa6-dcf3-43ab-98bf-34d7ef588f02.png" alt=""></p><h4 id="kong" tabindex="-1"><a class="header-anchor" href="#kong" aria-hidden="true">#</a> Kong</h4><p>Kong是一款基于OpenResty（Nginx + Lua模块）编写的高可用、易扩展的，由Mashape公司开源的API Gateway项目。<strong>Kong是基于NGINX和Apache Cassandra或PostgreSQL构建的</strong>，能提供易于使用的RESTful API来操作和配置API管理系统，所以它可以水平扩展多个Kong服务器，通过前置的负载均衡配置把请求均匀地分发到各个Server，来应对大批量的网络请求。 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-e2113ab8-0fc2-4df5-91be-60154e557cc0.png" alt=""></p><p>Kong主要有三个组件：</p><ul><li>Kong Server ：基于Nginx的服务器，用来接收API请求。</li><li>Apache Cassandra/PostgreSQL ：用来存储操作数据。</li><li>Kong dashboard：官方推荐UI管理工具，也可以使用 restfull 方式管理admin api。</li></ul><p>Kong采用插件机制进行功能定制，插件集（可以是0或N个）在API请求响应循环的生命周期中被执行。插件使用Lua编写，目前已有几个基础功能：<strong>HTTP基本认证、密钥认证、CORS（Cross-Origin Resource Sharing，跨域资源共享）、TCP、UDP、文件日志、API请求限流、请求转发以及Nginx监控。</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-c6c7c5e3-214b-472e-b998-8adc820aa922.png" alt=""></p><p>Kong网关具有以下的特性：</p><ul><li>可扩展性: 通过简单地添加更多的服务器，可以轻松地进行横向扩展，这意味着您的平台可以在一个较低负载的情况下处理任何请求；</li><li>模块化: 可以通过添加新的插件进行扩展，这些插件可以通过RESTful Admin API轻松配置；</li><li>在任何基础架构上运行: Kong网关可以在任何地方都能运行。您可以在云或内部网络环境中部署Kong，包括单个或多个数据中心设置，以及public，private 或invite-only APIs。</li></ul><h4 id="traefik" tabindex="-1"><a class="header-anchor" href="#traefik" aria-hidden="true">#</a> Traefik</h4><p>Træfɪk 是一个为了让部署微服务更加便捷而诞生的现代HTTP反向代理、负载均衡工具。 它支持多种后台 (Docker, Swarm, Kubernetes, Marathon, Mesos, Consul, Etcd, Zookeeper, BoltDB, Rest API, file…) 来自动化、动态的应用它的配置文件设置。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-553541d9-870d-45a8-8026-a1274d809e5e.png" alt=""></p><p>重要特性：</p><ul><li>它非常快，无需安装其他依赖，通过Go语言编写的单一可执行文件；</li><li><strong>多种后台支持：Docker, Swarm, Kubernetes, Marathon, Mesos, Consul, Etcd；</strong></li><li>支持支持Rest API、Websocket、HTTP/2、Docker镜像；</li><li>监听后台变化进而自动化应用新的配置文件设置；</li><li>配置文件热更新，无需重启进程；</li><li>后端断路器、负载均衡、容错机制；</li><li>清爽的前端页面，可监控服务指标。</li></ul><blockquote><p>关于Traefik的更多内容，可以查看官网：https://traefik.cn/</p></blockquote><h3 id="api网关对比" tabindex="-1"><a class="header-anchor" href="#api网关对比" aria-hidden="true">#</a> API网关对比</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-ad51c257-fe2d-435d-a043-92a70957756e.png" alt=""><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-ae017d9d-db0d-4322-805e-5230189561f5.png" alt=""><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-daf82b5b-011d-488d-9d60-c1221bd5b0ec.png" alt=""></p><p>上面是网关对比截图，偷个懒，大家主要关注Kong、Traefik和Zuul即可：</p><ul><li>从<strong>开源社区活跃度</strong>来看，无疑是Kong和Traefik较好；</li><li>从<strong>成熟度</strong>来看，较好的是Kong、Tyk、Traefik；</li><li>从<strong>性能</strong>来看，Kong要比其他几个领先一些；</li><li>从<strong>架构优势</strong>的扩展性来看，Kong、Tyk有丰富的插件，Ambassador也有插件但不多，而Zuul是完全需要自研，但Zuul由于与Spring Cloud深度集成，使用度也很高，近年来Istio服务网格的流行，Ambassador因为能够和Istio无缝集成也是相当大的优势。</li></ul><p>下面是其它网友的思考结论，可供参考：</p><ul><li><strong>性能</strong>：Nginx+Lua形式必然是高于Java语言实现的网关的，Java技术栈里面Zuul1.0是基于Servlet实现的，剩下都是基于webflux实现，性能是高于基于Servlet实现的。<strong>在性能方面我觉得选择网关可能不算那么重要，多加几台机器就可以搞定。</strong></li><li><strong>可维护性和扩展性</strong>：Nginx+Lua这个组合掌握的人不算多，如果团队有大神，大佬们就随意了，当没看到这段话，对于一般团队来说的话，选择自己团队擅长的语言更重要。Java技术栈下的3种网关，对于Zuul和Spring Cloud Getway需要或多或少要搞一些集成和配置页面来维护，但是对于Soul我就无脑看看文章，需要哪个搬哪个好了，尤其是可以无脑对接Dubbo美滋滋，此外Soul2.0以后版本可以摆脱ZK，在我心里再无诟病，我就喜欢无脑操作。</li><li><strong>高可用</strong>：对于网关高可用基本都是统一的策略都是采用多机器部署的方式，前面挂一个负载，对于而外需要用的一些组件大家注意一下。</li></ul><h2 id="基于traefik自研的微服务网关" tabindex="-1"><a class="header-anchor" href="#基于traefik自研的微服务网关" aria-hidden="true">#</a> 基于Traefik自研的微服务网关</h2><p>这个是我司自研的微服务网关，基于Traefik进行开发，下面从技术选型、网关框架、网关后台、协议转换进行讲解，绝对干货！</p><h3 id="技术栈选型" tabindex="-1"><a class="header-anchor" href="#技术栈选型" aria-hidden="true">#</a> 技术栈选型</h3><ul><li><strong>Traefik</strong>：一款开源的反向代理与负载均衡工具，它最大的优点是能够与常见的微服务系统直接整合，可以实现自动化动态配置。traefik较为轻量，非常易于使用和设置，性能比较好，已在全球范围内用于生产环境。</li><li><strong>Etcd</strong>：一个Go言编写的分布式、高可用的一致性键值存储系统，用于提供可靠的分布式键值存储、配置共享和服务发现等功能。</li><li><strong>Go</strong>：并发能力强，性能媲美C，处理能力是PHP的4倍，效率高，语法简单，易上手，开发效率接近PHP。</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-3567ace8-c7f3-4b5d-bf0f-9bb85fa8c439.png" alt=""></p><h3 id="网关框架" tabindex="-1"><a class="header-anchor" href="#网关框架" aria-hidden="true">#</a> 网关框架</h3><p>整个网关框架分为3块：</p><ul><li><strong>网关后台</strong>（hal-fe和hal-admin）：用于应用、服务和插件的配置，然后将配置信息发布到ETCD；</li><li><strong>Traefik</strong>：读取ETCD配置，根据配置信息对请求进行路由分发，如果需要鉴权，会直接通过hal-agent模块进行统一鉴权。鉴权完毕后，如果是Http请求，直接打到下游服务，如果是Grpc和Thrift协议，会通过hal-proxy模块进行协议转换。</li><li><strong>协议转换模块</strong>：读取ETCD配置，对Traefik分发过来的请求，进行Grpc和Thrift协议转换，并通过服务发现机制，获取服务下游机器，并通过负载均衡，将转换后的数据打到下游服务机器。</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-45943e5f-2cca-45ff-9fb0-908e3cf7c990.png" alt=""></p><h3 id="网关后台" tabindex="-1"><a class="header-anchor" href="#网关后台" aria-hidden="true">#</a> 网关后台</h3><p>主要由3大模块组成：</p><ul><li><strong>应用</strong>：主要包括应用名、域名、路径前缀、所属组、状态等，比如印度海外商城、印度社区；</li><li><strong>服务</strong>：主要包括服务名、注册方式、协议类型、所属组、状态等，比如评论服务、地址服务、搜索服务。</li><li><strong>插件</strong>：主要包括插件名称、插件类型、插件属性配置等，比如路径前缀替换插件、鉴权插件。</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-0b16b390-77b7-4fba-8529-7be31ba6335b.png" alt=""></p><p><strong>一个应用只能绑定一个服务，但是可以绑定多个插件。</strong> 通过后台完成网关配置后，将这些配置信息生成Config文件，发布到ETCD中，Config文件需要遵循严格的数据格式，比如Traefix配置需要遵循官方的文件配置格式，才能被Traefik识别。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-299f8c95-d6a3-49d8-946d-5efed32faa29.png" alt=""></p><h3 id="协议转换模块" tabindex="-1"><a class="header-anchor" href="#协议转换模块" aria-hidden="true">#</a> 协议转换模块</h3><p>hal-proxy模块是整个微服务网关最复杂，也是技术含量最高的模块，所以给大家详细讲解一下。</p><h4 id="问题引入" tabindex="-1"><a class="header-anchor" href="#问题引入" aria-hidden="true">#</a> 问题引入</h4><p>在讲这个模块前，我们先看下面几个问题：</p><ul><li>当请求从上游的trafik过来时，需要知道访问下游的机器IP和端口，才能将请求发送给下游，这些机器如何获取呢？</li><li>有了机器后，我们需要和下游机器建立连接，如果连接用一次就直接释放，肯定对服务会造成很大的压力，这就需要引入Client缓存池，那这个Client缓存池我们又该如何实现呢？</li><li>最后就是需要对协议进行转换，因为不同的下游服务，支持的协议类型是不一样的，这个网关又是如何动态支持的呢？</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-c2672067-0b21-41ba-807d-f59e0baf5b99.png" alt=""></p><h4 id="实现原理" tabindex="-1"><a class="header-anchor" href="#实现原理" aria-hidden="true">#</a> 实现原理</h4><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-e7f9c956-cdf2-4238-aeb3-372c61c1532f.png" alt=""></p><p>我们还是先看一下hal-proxy内部有哪些模块，首先是Resolver模块，这个模块的是什么作用呢？这里我简单介绍一下，目前公司内部通过服务获取到机器列表的方式有多种，比如MIS平台、服务树等，也就是有的是通过平台配置的，有的是直接挂在服务树下，无论哪种方式，我们都通过服务名，通过一定的方式，找到该服务下面所有的主机。</p><p><strong>所以Resolver模块的作用，其实就是通过服务名，找到该服务下的所有机器的IP和服务端口，然后持久化到内存中，并定时更新。</strong></p><p>协议模块就是支持不同的协议转换，每个协议类型的转换，都需要单独实现，<strong>这些协议转换，无非就是先通过机器IP和端口初始化Client，然后再将数据进行转换后，直接发送到下游的机器。</strong></p><p>最后就是连接池，之前我们其实也用到go自带的pool来做，但是当对pool数据进行更新时，需要加锁，所以性能一直起不来，后来<strong>改成了环形队列，然后对数据的操作全部通过原子操作方式，就实现了无锁操作，大大提高的并发性能。</strong></p><h4 id="实现逻辑" tabindex="-1"><a class="header-anchor" href="#实现逻辑" aria-hidden="true">#</a> 实现逻辑</h4><p>这个是hal-proxy的逻辑实现图，画了2天，包含所有核心对象的交互方式，这里就不去细讲，能掌握多少，靠大家自己领悟，如果有任何疑问(或者看不清图片)，可以关注我公众号，加我微信沟通。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-c79970c9-9fce-4164-a299-bb268b058924.png" alt=""></p><hr><blockquote><p>整理：沉默王二，戳<a href="https://mp.weixin.qq.com/s/b2xf4GiJksBQqjHVpsh49Q" target="_blank" rel="noopener noreferrer">转载链接<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，作者：楼仔，戳<a href="https://mp.weixin.qq.com/s/0Qupyl5eCyQGFEAIY6GxoQ" target="_blank" rel="noopener noreferrer">原文链接<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>。</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/microservice/api-wangguan.md" rel="noopener noreferrer" target="_blank" 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href="/microservice/api-wangguan.html#协议转换模块" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="协议转换模块"><!---->协议转换模块<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.8 消息队列</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->微服务网关：从对比到选型，由理论到实践</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年5月21日</span><meta property="datePublished" content="2022-05-21T00:14:16.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category5" role>Java企业级开发</li><meta property="articleSection" content="Java企业级开发"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag1" role>微服务网关</li></ul><meta property="keywords" content="微服务网关"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 17 分钟</span><meta property="timeRequired" content="PT17M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/microservice/api-wangguan.html#api网关基础" class="router-link-active router-link-exact-active toc-link level2">API网关基础</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/microservice/api-wangguan.html#什么是api网关" class="router-link-active router-link-exact-active toc-link level3">什么是API网关</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/microservice/api-wangguan.html#网关的主要功能" class="router-link-active router-link-exact-active toc-link level3">网关的主要功能</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/microservice/api-wangguan.html#api网关选型" class="router-link-active router-link-exact-active toc-link level2">API网关选型</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/microservice/api-wangguan.html#常用api网关" class="router-link-active router-link-exact-active toc-link level3">常用API网关</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/microservice/api-wangguan.html#api网关对比" class="router-link-active router-link-exact-active toc-link level3">API网关对比</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/microservice/api-wangguan.html#基于traefik自研的微服务网关" class="router-link-active router-link-exact-active toc-link level2">基于Traefik自研的微服务网关</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/microservice/api-wangguan.html#技术栈选型" class="router-link-active router-link-exact-active toc-link level3">技术栈选型</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/microservice/api-wangguan.html#网关框架" class="router-link-active router-link-exact-active toc-link level3">网关框架</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/microservice/api-wangguan.html#网关后台" class="router-link-active router-link-exact-active toc-link level3">网关后台</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/microservice/api-wangguan.html#协议转换模块" class="router-link-active router-link-exact-active toc-link level3">协议转换模块</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><blockquote><p>整理：沉默王二，戳<a href="https://mp.weixin.qq.com/s/b2xf4GiJksBQqjHVpsh49Q" target="_blank" rel="noopener noreferrer">转载链接<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，作者：楼仔，戳<a href="https://mp.weixin.qq.com/s/0Qupyl5eCyQGFEAIY6GxoQ" target="_blank" rel="noopener noreferrer">原文链接<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>。</p></blockquote><p>微服务近几年非常火，围绕微服务的技术生态也比较多，比如微服务网关、Docker、Kubernetes等。</p><p>我是于2019年开始接触微服务网关，当时和公司的一位同事一起开发，由于技术能力有限，我只负责网关后台，后续微服务网关的迭代，我其实没有参与，不过后来抽空看了微服务网关前台的代码，所以对这套微服务网关的实现原理算是基本掌握。</p><p>最近在写技术栈相关的文章，刚好写到微服务网关，就把之前学习的知识进行简单总结，同时也把市面上常用的微服务网关进行梳理，一方面便于后续技术选型，另一方面也算是给自己一个交代。下面是文章目录：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-f910e9f2-0374-4afb-aef0-3ea47c9b7f67.png" alt=""></p><h2 id="api网关基础" tabindex="-1"><a class="header-anchor" href="#api网关基础" aria-hidden="true">#</a> API网关基础</h2><h3 id="什么是api网关" tabindex="-1"><a class="header-anchor" href="#什么是api网关" aria-hidden="true">#</a> 什么是API网关</h3><p><strong>API网关是一个服务器，是系统的唯一入口。</strong> 从面向对象设计的角度看，它与外观模式类似。</p><p>API网关封装了系统内部架构，为每个客户端提供一个定制的API。它可能还具有其它职责，如身份验证、监控、负载均衡、缓存、协议转换、限流熔断、静态响应处理。</p><p><strong>API网关方式的核心要点是，所有的客户端和消费端都通过统一的网关接入微服务</strong>，在网关层处理所有的非业务功能。通常，网关也是提供REST/HTTP的访问API。</p><h3 id="网关的主要功能" tabindex="-1"><a class="header-anchor" href="#网关的主要功能" aria-hidden="true">#</a> 网关的主要功能</h3><p>微服务网关作为微服务后端服务的统一入口，它可以统筹管理后端服务，主要分为数据平面和控制平面：</p><ul><li>数据平面主要功能是接入用户的HTTP请求和微服务被拆分后的聚合。使用微服务网关统一对外暴露后端服务的API和契约，路由和过滤功能正是网关的核心能力模块。另外，微服务网关可以实现拦截机制和专注跨横切面的功能，包括协议转换、安全认证、熔断限流、灰度发布、日志管理、流量监控等。</li><li>控制平面主要功能是对后端服务做统一的管控和配置管理。例如，可以控制网关的弹性伸缩；可以统一下发配置；可以对网关服务添加标签；可以在微服务网关上通过配置Swagger功能统一将后端服务的API契约暴露给使用方，完成文档服务，提高工作效率和降低沟通成本。</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-f6ea867d-ffdf-4da2-a89d-fccbe6326110.png" alt=""></p><ul><li><strong>路由功能</strong>：路由是微服务网关的核心能力。通过路由功能微服务网关可以将请求转发到目标微服务。在微服务架构中，网关可以结合注册中心的动态服务发现，实现对后端服务的发现，调用方只需要知道网关对外暴露的服务API就可以透明地访问后端微服务。</li><li><strong>负载均衡</strong>：API网关结合负载均衡技术，利用Eureka或者Consul等服务发现工具，通过轮询、指定权重、IP地址哈希等机制实现下游服务的负载均衡。</li><li><strong>统一鉴权</strong>：一般而言，无论对内网还是外网的接口都需要做用户身份认证，而用户认证在一些规模较大的系统中都会采用统一的单点登录（Single Sign On）系统，如果每个微服务都要对接单点登录系统，那么显然比较浪费资源且开发效率低。API网关是统一管理安全性的绝佳场所，可以将认证的部分抽取到网关层，微服务系统无须关注认证的逻辑，只关注自身业务即可。</li><li><strong>协议转换</strong>：API网关的一大作用在于构建异构系统，API网关作为单一入口，通过协议转换整合后台基于REST、AMQP、Dubbo等不同风格和实现技术的微服务，面向Web Mobile、开放平台等特定客户端提供统一服务。</li><li><strong>指标监控</strong>：网关可以统计后端服务的请求次数，并且可以实时地更新当前的流量健康状态，可以对URL粒度的服务进行延迟统计，也可以使用Hystrix Dashboard查看后端服务的流量状态及是否有熔断发生。</li><li><strong>限流熔断</strong>：在某些场景下需要控制客户端的访问次数和访问频率，一些高并发系统有时还会有限流的需求。在网关上可以配置一个阈值，当请求数超过阈值时就直接返回错误而不继续访问后台服务。当出现流量洪峰或者后端服务出现延迟或故障时，网关能够主动进行熔断，保护后端服务，并保持前端用户体验良好。</li><li><strong>黑白名单</strong>：微服务网关可以使用系统黑名单，过滤HTTP请求特征，拦截异常客户端的请求，例如DDoS攻击等侵蚀带宽或资源迫使服务中断等行为，可以在网关层面进行拦截过滤。比较常见的拦截策略是根据IP地址增加黑名单。在存在鉴权管理的路由服务中可以通过设置白名单跳过鉴权管理而直接访问后端服务资源。</li><li><strong>灰度发布</strong>：微服务网关可以根据HTTP请求中的特殊标记和后端服务列表元数据标识进行流量控制，实现在用户无感知的情况下完成灰度发布。</li><li><strong>流量染色</strong>：和灰度发布的原理相似，网关可以根据HTTP请求的Host、Head、Agent等标识对请求进行染色，有了网关的流量染色功能，我们可以对服务后续的调用链路进行跟踪，对服务延迟及服务运行状况进行进一步的链路分析。</li><li><strong>文档中心</strong>：网关结合Swagger，可以将后端的微服务暴露给网关，网关作为统一的入口给接口的使用方提供查看后端服务的API规范，不需要知道每一个后端微服务的Swagger地址，这样网关起到了对后端API聚合的效果。</li><li><strong>日志审计</strong>：微服务网关可以作为统一的日志记录和收集器，对服务URL粒度的日志请求信息和响应信息进行拦截。</li></ul><h2 id="api网关选型" tabindex="-1"><a class="header-anchor" href="#api网关选型" aria-hidden="true">#</a> API网关选型</h2><h3 id="常用api网关" tabindex="-1"><a class="header-anchor" href="#常用api网关" aria-hidden="true">#</a> 常用API网关</h3><p>先简单看一下市面上常用的API网关：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-ddaf1b1e-60b2-4cff-bab2-2b7b32f07f72.png" alt=""></p><h4 id="nginx" tabindex="-1"><a class="header-anchor" href="#nginx" aria-hidden="true">#</a> Nginx</h4><p>Nginx是一个高性能的HTTP和反向代理服务器。<strong>Nginx一方面可以做反向代理，另外一方面可以做静态资源服务器，接口使用Lua动态语言可以完成灵活的定制功能。</strong></p><p>Nginx 在启动后，会有一个 Master 进程和多个 Worker 进程，Master 进程和 Worker 进程之间是通过进程间通信进行交互的，如图所示。Worker 工作进程的阻塞点是在像 select()、epoll_wait() 等这样的 I/O 多路复用函数调用处，以等待发生数据可读 / 写事件。Nginx 采用了异步非阻塞的方式来处理请求，也就是说，Nginx 是可以同时处理成千上万个请求的。</p><h4 id="zuul" tabindex="-1"><a class="header-anchor" href="#zuul" aria-hidden="true">#</a> Zuul</h4><p>Zuul 是 Netflix 开源的一个API网关组件，它可以和 Eureka、Ribbon、Hystrix 等组件配合使用。社区活跃，融合于 SpringCloud 完整生态，是构建微服务体系前置网关服务的最佳选型之一。</p><p>Zuul 的核心是一系列的过滤器，这些过滤器可以完成以下功能：</p><ul><li><strong>统一鉴权 + 动态路由 + 负载均衡 + 压力测试</strong></li><li><strong>审查与监控</strong>：与边缘位置追踪有意义的数据和统计结果，从而带来精确的生产视图。</li><li><strong>多区域弹性</strong>：跨越 AWS Region 进行请求路由，旨在实现 ELB（Elastic Load Balancing，弹性负载均衡）使用的多样化，以及让系统的边缘更贴近系统的使用者。</li></ul><p>Zuul 目前有两个大的版本：<strong>Zuul1 和 Zuul2</strong></p><p>Zuul1 是基于 Servlet 框架构建，如图所示，采用的是阻塞和多线程方式，即一个线程处理一次连接请求，这种方式在内部延迟严重、设备故障较多情况下会引起存活的连接增多和线程增加的情况发生。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-93bef98d-7d71-48d1-943a-b8ede72432c8.png" alt=""></p><p>Netflix 发布的 Zuul2 有重大的更新，它运行在异步和无阻塞框架上，每个 CPU 核一个线程，处理所有的请求和响应，请求和响应的生命周期是通过事件和回调来处理的，这种方式减少了线程数量，因此开销较小。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-90dfae10-7cbd-4099-a5df-ea09a1435bc0.png" alt=""></p><h4 id="spring-cloud-getway" tabindex="-1"><a class="header-anchor" href="#spring-cloud-getway" aria-hidden="true">#</a> Spring Cloud GetWay</h4><p>Spring Cloud Gateway 是Spring Cloud的一个全新的API网关项目，目的是为了替换掉Zuul1，它基于Spring5.0 + SpringBoot2.0 + WebFlux（基于⾼性能的Reactor模式响应式通信框架Netty，异步⾮阻塞模型）等技术开发，性能⾼于Zuul，官⽅测试，<strong>Spring Cloud GateWay是Zuul的1.6倍</strong>，旨在为微服务架构提供⼀种简单有效的统⼀的API路由管理⽅式。</p><p>Spring Cloud Gateway可以与Spring Cloud Discovery Client（如Eureka）、Ribbon、Hystrix等组件配合使用，<strong>实现路由转发、负载均衡、熔断、鉴权、路径重写、⽇志监控等，并且Gateway还内置了限流过滤器，实现了限流的功能。</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-71c6dfa6-dcf3-43ab-98bf-34d7ef588f02.png" alt=""></p><h4 id="kong" tabindex="-1"><a class="header-anchor" href="#kong" aria-hidden="true">#</a> Kong</h4><p>Kong是一款基于OpenResty（Nginx + Lua模块）编写的高可用、易扩展的，由Mashape公司开源的API Gateway项目。<strong>Kong是基于NGINX和Apache Cassandra或PostgreSQL构建的</strong>，能提供易于使用的RESTful API来操作和配置API管理系统，所以它可以水平扩展多个Kong服务器，通过前置的负载均衡配置把请求均匀地分发到各个Server，来应对大批量的网络请求。 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-e2113ab8-0fc2-4df5-91be-60154e557cc0.png" alt=""></p><p>Kong主要有三个组件：</p><ul><li>Kong Server ：基于Nginx的服务器，用来接收API请求。</li><li>Apache Cassandra/PostgreSQL ：用来存储操作数据。</li><li>Kong dashboard：官方推荐UI管理工具，也可以使用 restfull 方式管理admin api。</li></ul><p>Kong采用插件机制进行功能定制，插件集（可以是0或N个）在API请求响应循环的生命周期中被执行。插件使用Lua编写，目前已有几个基础功能：<strong>HTTP基本认证、密钥认证、CORS（Cross-Origin Resource Sharing，跨域资源共享）、TCP、UDP、文件日志、API请求限流、请求转发以及Nginx监控。</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-c6c7c5e3-214b-472e-b998-8adc820aa922.png" alt=""></p><p>Kong网关具有以下的特性：</p><ul><li>可扩展性: 通过简单地添加更多的服务器，可以轻松地进行横向扩展，这意味着您的平台可以在一个较低负载的情况下处理任何请求；</li><li>模块化: 可以通过添加新的插件进行扩展，这些插件可以通过RESTful Admin API轻松配置；</li><li>在任何基础架构上运行: Kong网关可以在任何地方都能运行。您可以在云或内部网络环境中部署Kong，包括单个或多个数据中心设置，以及public，private 或invite-only APIs。</li></ul><h4 id="traefik" tabindex="-1"><a class="header-anchor" href="#traefik" aria-hidden="true">#</a> Traefik</h4><p>Træfɪk 是一个为了让部署微服务更加便捷而诞生的现代HTTP反向代理、负载均衡工具。 它支持多种后台 (Docker, Swarm, Kubernetes, Marathon, Mesos, Consul, Etcd, Zookeeper, BoltDB, Rest API, file…) 来自动化、动态的应用它的配置文件设置。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-553541d9-870d-45a8-8026-a1274d809e5e.png" alt=""></p><p>重要特性：</p><ul><li>它非常快，无需安装其他依赖，通过Go语言编写的单一可执行文件；</li><li><strong>多种后台支持：Docker, Swarm, Kubernetes, Marathon, Mesos, Consul, Etcd；</strong></li><li>支持支持Rest API、Websocket、HTTP/2、Docker镜像；</li><li>监听后台变化进而自动化应用新的配置文件设置；</li><li>配置文件热更新，无需重启进程；</li><li>后端断路器、负载均衡、容错机制；</li><li>清爽的前端页面，可监控服务指标。</li></ul><blockquote><p>关于Traefik的更多内容，可以查看官网：https://traefik.cn/</p></blockquote><h3 id="api网关对比" tabindex="-1"><a class="header-anchor" href="#api网关对比" aria-hidden="true">#</a> API网关对比</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-ad51c257-fe2d-435d-a043-92a70957756e.png" alt=""><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-ae017d9d-db0d-4322-805e-5230189561f5.png" alt=""><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-daf82b5b-011d-488d-9d60-c1221bd5b0ec.png" alt=""></p><p>上面是网关对比截图，偷个懒，大家主要关注Kong、Traefik和Zuul即可：</p><ul><li>从<strong>开源社区活跃度</strong>来看，无疑是Kong和Traefik较好；</li><li>从<strong>成熟度</strong>来看，较好的是Kong、Tyk、Traefik；</li><li>从<strong>性能</strong>来看，Kong要比其他几个领先一些；</li><li>从<strong>架构优势</strong>的扩展性来看，Kong、Tyk有丰富的插件，Ambassador也有插件但不多，而Zuul是完全需要自研，但Zuul由于与Spring Cloud深度集成，使用度也很高，近年来Istio服务网格的流行，Ambassador因为能够和Istio无缝集成也是相当大的优势。</li></ul><p>下面是其它网友的思考结论，可供参考：</p><ul><li><strong>性能</strong>：Nginx+Lua形式必然是高于Java语言实现的网关的，Java技术栈里面Zuul1.0是基于Servlet实现的，剩下都是基于webflux实现，性能是高于基于Servlet实现的。<strong>在性能方面我觉得选择网关可能不算那么重要，多加几台机器就可以搞定。</strong></li><li><strong>可维护性和扩展性</strong>：Nginx+Lua这个组合掌握的人不算多，如果团队有大神，大佬们就随意了，当没看到这段话，对于一般团队来说的话，选择自己团队擅长的语言更重要。Java技术栈下的3种网关，对于Zuul和Spring Cloud Getway需要或多或少要搞一些集成和配置页面来维护，但是对于Soul我就无脑看看文章，需要哪个搬哪个好了，尤其是可以无脑对接Dubbo美滋滋，此外Soul2.0以后版本可以摆脱ZK，在我心里再无诟病，我就喜欢无脑操作。</li><li><strong>高可用</strong>：对于网关高可用基本都是统一的策略都是采用多机器部署的方式，前面挂一个负载，对于而外需要用的一些组件大家注意一下。</li></ul><h2 id="基于traefik自研的微服务网关" tabindex="-1"><a class="header-anchor" href="#基于traefik自研的微服务网关" aria-hidden="true">#</a> 基于Traefik自研的微服务网关</h2><p>这个是我司自研的微服务网关，基于Traefik进行开发，下面从技术选型、网关框架、网关后台、协议转换进行讲解，绝对干货！</p><h3 id="技术栈选型" tabindex="-1"><a class="header-anchor" href="#技术栈选型" aria-hidden="true">#</a> 技术栈选型</h3><ul><li><strong>Traefik</strong>：一款开源的反向代理与负载均衡工具，它最大的优点是能够与常见的微服务系统直接整合，可以实现自动化动态配置。traefik较为轻量，非常易于使用和设置，性能比较好，已在全球范围内用于生产环境。</li><li><strong>Etcd</strong>：一个Go言编写的分布式、高可用的一致性键值存储系统，用于提供可靠的分布式键值存储、配置共享和服务发现等功能。</li><li><strong>Go</strong>：并发能力强，性能媲美C，处理能力是PHP的4倍，效率高，语法简单，易上手，开发效率接近PHP。</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-3567ace8-c7f3-4b5d-bf0f-9bb85fa8c439.png" alt=""></p><h3 id="网关框架" tabindex="-1"><a class="header-anchor" href="#网关框架" aria-hidden="true">#</a> 网关框架</h3><p>整个网关框架分为3块：</p><ul><li><strong>网关后台</strong>（hal-fe和hal-admin）：用于应用、服务和插件的配置，然后将配置信息发布到ETCD；</li><li><strong>Traefik</strong>：读取ETCD配置，根据配置信息对请求进行路由分发，如果需要鉴权，会直接通过hal-agent模块进行统一鉴权。鉴权完毕后，如果是Http请求，直接打到下游服务，如果是Grpc和Thrift协议，会通过hal-proxy模块进行协议转换。</li><li><strong>协议转换模块</strong>：读取ETCD配置，对Traefik分发过来的请求，进行Grpc和Thrift协议转换，并通过服务发现机制，获取服务下游机器，并通过负载均衡，将转换后的数据打到下游服务机器。</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-45943e5f-2cca-45ff-9fb0-908e3cf7c990.png" alt=""></p><h3 id="网关后台" tabindex="-1"><a class="header-anchor" href="#网关后台" aria-hidden="true">#</a> 网关后台</h3><p>主要由3大模块组成：</p><ul><li><strong>应用</strong>：主要包括应用名、域名、路径前缀、所属组、状态等，比如印度海外商城、印度社区；</li><li><strong>服务</strong>：主要包括服务名、注册方式、协议类型、所属组、状态等，比如评论服务、地址服务、搜索服务。</li><li><strong>插件</strong>：主要包括插件名称、插件类型、插件属性配置等，比如路径前缀替换插件、鉴权插件。</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-0b16b390-77b7-4fba-8529-7be31ba6335b.png" alt=""></p><p><strong>一个应用只能绑定一个服务，但是可以绑定多个插件。</strong> 通过后台完成网关配置后，将这些配置信息生成Config文件，发布到ETCD中，Config文件需要遵循严格的数据格式，比如Traefix配置需要遵循官方的文件配置格式，才能被Traefik识别。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-299f8c95-d6a3-49d8-946d-5efed32faa29.png" alt=""></p><h3 id="协议转换模块" tabindex="-1"><a class="header-anchor" href="#协议转换模块" aria-hidden="true">#</a> 协议转换模块</h3><p>hal-proxy模块是整个微服务网关最复杂，也是技术含量最高的模块，所以给大家详细讲解一下。</p><h4 id="问题引入" tabindex="-1"><a class="header-anchor" href="#问题引入" aria-hidden="true">#</a> 问题引入</h4><p>在讲这个模块前，我们先看下面几个问题：</p><ul><li>当请求从上游的trafik过来时，需要知道访问下游的机器IP和端口，才能将请求发送给下游，这些机器如何获取呢？</li><li>有了机器后，我们需要和下游机器建立连接，如果连接用一次就直接释放，肯定对服务会造成很大的压力，这就需要引入Client缓存池，那这个Client缓存池我们又该如何实现呢？</li><li>最后就是需要对协议进行转换，因为不同的下游服务，支持的协议类型是不一样的，这个网关又是如何动态支持的呢？</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-c2672067-0b21-41ba-807d-f59e0baf5b99.png" alt=""></p><h4 id="实现原理" tabindex="-1"><a class="header-anchor" href="#实现原理" aria-hidden="true">#</a> 实现原理</h4><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-e7f9c956-cdf2-4238-aeb3-372c61c1532f.png" alt=""></p><p>我们还是先看一下hal-proxy内部有哪些模块，首先是Resolver模块，这个模块的是什么作用呢？这里我简单介绍一下，目前公司内部通过服务获取到机器列表的方式有多种，比如MIS平台、服务树等，也就是有的是通过平台配置的，有的是直接挂在服务树下，无论哪种方式，我们都通过服务名，通过一定的方式，找到该服务下面所有的主机。</p><p><strong>所以Resolver模块的作用，其实就是通过服务名，找到该服务下的所有机器的IP和服务端口，然后持久化到内存中，并定时更新。</strong></p><p>协议模块就是支持不同的协议转换，每个协议类型的转换，都需要单独实现，<strong>这些协议转换，无非就是先通过机器IP和端口初始化Client，然后再将数据进行转换后，直接发送到下游的机器。</strong></p><p>最后就是连接池，之前我们其实也用到go自带的pool来做，但是当对pool数据进行更新时，需要加锁，所以性能一直起不来，后来<strong>改成了环形队列，然后对数据的操作全部通过原子操作方式，就实现了无锁操作，大大提高的并发性能。</strong></p><h4 id="实现逻辑" tabindex="-1"><a class="header-anchor" href="#实现逻辑" aria-hidden="true">#</a> 实现逻辑</h4><p>这个是hal-proxy的逻辑实现图，画了2天，包含所有核心对象的交互方式，这里就不去细讲，能掌握多少，靠大家自己领悟，如果有任何疑问(或者看不清图片)，可以关注我公众号，加我微信沟通。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/microservice/api-wangguan-c79970c9-9fce-4164-a299-bb268b058924.png" alt=""></p><hr><blockquote><p>整理：沉默王二，戳<a href="https://mp.weixin.qq.com/s/b2xf4GiJksBQqjHVpsh49Q" target="_blank" rel="noopener noreferrer">转载链接<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，作者：楼仔，戳<a 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aria-label="一、前言"><!---->一、前言<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">二、Java核心</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">四、数据库</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">MySQL</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">Redis</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">MongoDB</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a aria-current="page" href="/mongodb/rumen.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="MongoDB最基础入门教程"><!---->MongoDB最基础入门教程<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/mongodb/rumen.html#_01、mongodb-是什么" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="01、MongoDB 是什么"><!---->01、MongoDB 是什么<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/mongodb/rumen.html#_02、安装-mongodb" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="02、安装 MongoDB"><!---->02、安装 MongoDB<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/mongodb/rumen.html#_03、安装-robo-3t" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="03、安装 Robo 3T"><!---->03、安装 Robo 3T<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/mongodb/rumen.html#_04、mongodb-的相关概念" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="04、MongoDB 的相关概念"><!---->04、MongoDB 的相关概念<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/mongodb/rumen.html#_05、在-java-中使用-mongodb" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="05、在 Java 中使用 MongoDB"><!---->05、在 Java 中使用 MongoDB<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/mongodb/rumen.html#_06、鸣谢" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="06、鸣谢"><!---->06、鸣谢<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li></ul></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->MongoDB最基础入门教程</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月17日</span><meta property="datePublished" content="2022-03-17T03:18:03.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category6" role>数据库</li><meta property="articleSection" content="数据库"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag3" role>MongoDB</li></ul><meta property="keywords" content="MongoDB"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 7 分钟</span><meta property="timeRequired" content="PT7M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/mongodb/rumen.html#_01、mongodb-是什么" class="router-link-active router-link-exact-active toc-link level3">01、MongoDB 是什么</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/mongodb/rumen.html#_02、安装-mongodb" class="router-link-active router-link-exact-active toc-link level3">02、安装 MongoDB</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/mongodb/rumen.html#_03、安装-robo-3t" class="router-link-active router-link-exact-active toc-link level3">03、安装 Robo 3T</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/mongodb/rumen.html#_04、mongodb-的相关概念" class="router-link-active router-link-exact-active toc-link level3">04、MongoDB 的相关概念</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/mongodb/rumen.html#_05、在-java-中使用-mongodb" class="router-link-active router-link-exact-active toc-link level3">05、在 Java 中使用 MongoDB</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/mongodb/rumen.html#_06、鸣谢" class="router-link-active router-link-exact-active toc-link level3">06、鸣谢</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="mongodb最基础入门教程" tabindex="-1"><a class="header-anchor" href="#mongodb最基础入门教程" aria-hidden="true">#</a> MongoDB最基础入门教程</h1><p>我以为我对MongoDB十分了解，直到我遇到了字节面试官</p><p>有时候不得不感慨一下，系统升级真的是好处多多，不仅让我有机会重构了之前的烂代码，也满足了我积极好学的虚荣心。你看，<a href="https://mp.weixin.qq.com/s/NPJkMy5RppyFk9QhzHxhrw" target="_blank" rel="noopener noreferrer">Redis 入门<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>了、<a href="https://mp.weixin.qq.com/s/ZjsZxle7m_dfmVwVkq2ayg" target="_blank" rel="noopener noreferrer">Elasticsearch 入门<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>了，这次又要入门 MongoDB，感觉自己变秃的同时，也变强大了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mongodb/rumen-a1f2d203-e586-4ca1-8556-e1a94c6b411e.jpg" alt=""></p><p>小伙伴们在继续阅读之前，我必须要声明一点，我对 MongoDB 并没有进行很深入的研究，仅仅是因为要用，就学一下。但作为一名负责任的技术博主，我是花了心思的，这篇入门教程，小伙伴们读完后绝对会感到满意，忍不住点赞。</p><p>当然了，小伙伴们遇到文章中有错误的地方，不要手下留情，可以组团过来捶我，但要保证一点，不要打脸，我怕毁容。</p><h3 id="_01、mongodb-是什么" tabindex="-1"><a class="header-anchor" href="#_01、mongodb-是什么" aria-hidden="true">#</a> 01、MongoDB 是什么</h3><blockquote><p>MongoDB 是一个基于分布式的文件存储数据库，旨在为 Web 应用提供可扩展的高性能数据存储解决方案。</p></blockquote><p>以上引用来自于官方，不得不说，解释得文绉绉的。那就让我来换一种通俗的说法给小伙伴们解释一下，MongoDB 将数据存储为一个文档（类似于 JSON 对象），数据结构由键值对组成，类似于 Java 中的 Map，通过 key 的方式访问起来效率就高得多，对吧？这也是 MongoDB 最重要的特点。</p><p>MongoDB 提供了企业版（功能更强大）和社区版，对于我们开发者来说，拿社区版来学习和使用就足够了。MongoDB 的驱动包很多，常见的编程语言都有覆盖到，比如说 Java、JavaScript、C++、C#、Python 等等。</p><p>很多知名的互联网公司都在用 MongoDB，比如说谷歌、Facebook、eBay 等等。总之，值得信赖，小伙伴们放心入门，技多不压身啊，就当是给自己一次学习的机会。</p><h3 id="_02、安装-mongodb" tabindex="-1"><a class="header-anchor" href="#_02、安装-mongodb" aria-hidden="true">#</a> 02、安装 MongoDB</h3><p>MongoDB 针对不同的操作系统有不同的安装包，我们这篇入门的文章就以 Windows 为例吧。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mongodb/rumen-557ab648-e2c4-4309-8695-aeb7fbcba25b.jpg" alt=""></p><p>官网下载地址如下：</p><p><a href="https://www.mongodb.com/download-center/community" target="_blank" rel="noopener noreferrer">https://www.mongodb.com/download-center/community<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><p>最新的版本是 4.2.6，我选择的是安装版，msi 格式的，264M 左右。下载完就可以双击运行安装，傻瓜式的。</p><p>建议选择「Custom」自定义安装，如下图所示。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mongodb/rumen-42330ff2-598a-40bf-b252-480704c6a531.jpg" alt=""></p><p>以服务模式运行，并配置好数据和日志目录，如下图所示。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mongodb/rumen-c71a31d4-5a99-4c12-93a9-348aa79bc086.jpg" alt=""></p><p>建议取消勾选安装 MongoDB 的图形化客户端工具，否则安装速度慢到你想要去扣会手机。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mongodb/rumen-84ea8b51-6b53-4500-86fa-0dcfa61b84cd.jpg" alt=""></p><p>安装完成后进入到 bin 目录下，双击 mongo.exe 文件就可以连接到 MongoDB 服务了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mongodb/rumen-bcf34981-0c2b-4f86-94e0-711dfb307371.jpg" alt=""></p><p>1）MongoDB 的默认端口号为 27017。</p><p>2）MongoDB 的版本号为 4.2.6。</p><p>默认会连接到 test 文档（相当于数据），可以通过 db 命令查询。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mongodb/rumen-ded1c30c-9943-4061-8fa3-4562387b72cd.jpg" alt=""></p><p>还可以运行一些简单的算术运算：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mongodb/rumen-22c1d414-6ba4-47dd-beb8-f1003f21083e.jpg" alt=""></p><p>那如何停止服务呢？可以直接点击右上角的 X 号——粗暴、壁咚。</p><h3 id="_03、安装-robo-3t" tabindex="-1"><a class="header-anchor" href="#_03、安装-robo-3t" aria-hidden="true">#</a> 03、安装 Robo 3T</h3><p>Robo 3T 提供了对 MongoDB 和 SCRAM-SHA-256（升级的 mongo shell）的支持，是一款轻量级的 MongoDB 客户端工具。</p><p>下载地址如下：</p><p><a href="https://robomongo.org/download" target="_blank" rel="noopener noreferrer">https://robomongo.org/download<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><p>最新的版本是 1.3，选择 zip 格式进行下载，23M 左右。下载完成后，解压就行了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mongodb/rumen-b178e02c-23b6-4b54-92ec-3a170a8499d0.jpg" alt=""></p><p>包目录不再一一解释了，进入 bin 目录下，双击运行 robo3t.exe 文件，启动 Robo 3T 客户端。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mongodb/rumen-99717a12-c90d-4a03-941d-f3857f503d44.jpg" alt=""></p><p>点击「Create」创建一个 MongoDB 的连接。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mongodb/rumen-11866209-6a60-4a6a-9ca9-fcd9279796f6.jpg" alt=""></p><p>连接成功后，就可以操作 MongoDB 了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mongodb/rumen-753dfcd7-1557-4837-9a7e-94b2ff9db72a.jpg" alt=""></p><p>（不过，小伙伴们这时候也不太知道该怎么操作，毕竟 MongoDB 的一些相关概念还不清楚，无从下手啊）</p><h3 id="_04、mongodb-的相关概念" tabindex="-1"><a class="header-anchor" href="#_04、mongodb-的相关概念" aria-hidden="true">#</a> 04、MongoDB 的相关概念</h3><p>随着互联网的极速发展，用户数据也越来越庞大，NoSQL 数据库的发展能够很好地处理这些大的数据，MongoDB 是 NoSQL 数据库中的一个典型的代表。</p><p>说到这，可能有些小伙伴们还不知道 NoSQL 是啥意思，我简单解释一下。NoSQL 可不是没有 SQL 的意思，它实际的含义是 Not Only SQL，也就是“不仅仅是 SQL”，指的是非关系型数据库，和传统的关系型数据库 MySQL、Oracle 不同。</p><p>MongoDB 命名源于英文单词 hu<strong>mongo</strong>us，意思是「巨大无比」，可以看得出 MongoDB 的野心。MongoDB 的数据以类似于 JSON 格式的二进制文档存储：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>{
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class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="MongoDB最基础入门教程"><!---->MongoDB最基础入门教程<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/mongodb/rumen.html#_01、mongodb-是什么" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="01、MongoDB 是什么"><!---->01、MongoDB 是什么<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/mongodb/rumen.html#_02、安装-mongodb" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="02、安装 MongoDB"><!---->02、安装 MongoDB<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/mongodb/rumen.html#_03、安装-robo-3t" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="03、安装 Robo 3T"><!---->03、安装 Robo 3T<!----></a><ul 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class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->MongoDB最基础入门教程</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月17日</span><meta property="datePublished" content="2022-03-17T03:18:03.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category6" role>数据库</li><meta property="articleSection" content="数据库"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag3" role>MongoDB</li></ul><meta property="keywords" content="MongoDB"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 7 分钟</span><meta property="timeRequired" content="PT7M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/mongodb/rumen.html#_01、mongodb-是什么" class="router-link-active router-link-exact-active toc-link level3">01、MongoDB 是什么</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/mongodb/rumen.html#_02、安装-mongodb" class="router-link-active router-link-exact-active toc-link level3">02、安装 MongoDB</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/mongodb/rumen.html#_03、安装-robo-3t" class="router-link-active router-link-exact-active toc-link level3">03、安装 Robo 3T</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/mongodb/rumen.html#_04、mongodb-的相关概念" class="router-link-active router-link-exact-active toc-link level3">04、MongoDB 的相关概念</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/mongodb/rumen.html#_05、在-java-中使用-mongodb" class="router-link-active router-link-exact-active toc-link level3">05、在 Java 中使用 MongoDB</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/mongodb/rumen.html#_06、鸣谢" class="router-link-active router-link-exact-active toc-link level3">06、鸣谢</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="mongodb最基础入门教程" tabindex="-1"><a class="header-anchor" href="#mongodb最基础入门教程" aria-hidden="true">#</a> MongoDB最基础入门教程</h1><p>我以为我对MongoDB十分了解，直到我遇到了字节面试官</p><p>有时候不得不感慨一下，系统升级真的是好处多多，不仅让我有机会重构了之前的烂代码，也满足了我积极好学的虚荣心。你看，<a href="https://mp.weixin.qq.com/s/NPJkMy5RppyFk9QhzHxhrw" target="_blank" rel="noopener noreferrer">Redis 入门<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>了、<a href="https://mp.weixin.qq.com/s/ZjsZxle7m_dfmVwVkq2ayg" target="_blank" rel="noopener noreferrer">Elasticsearch 入门<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>了，这次又要入门 MongoDB，感觉自己变秃的同时，也变强大了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mongodb/rumen-a1f2d203-e586-4ca1-8556-e1a94c6b411e.jpg" alt=""></p><p>小伙伴们在继续阅读之前，我必须要声明一点，我对 MongoDB 并没有进行很深入的研究，仅仅是因为要用，就学一下。但作为一名负责任的技术博主，我是花了心思的，这篇入门教程，小伙伴们读完后绝对会感到满意，忍不住点赞。</p><p>当然了，小伙伴们遇到文章中有错误的地方，不要手下留情，可以组团过来捶我，但要保证一点，不要打脸，我怕毁容。</p><h3 id="_01、mongodb-是什么" tabindex="-1"><a class="header-anchor" href="#_01、mongodb-是什么" aria-hidden="true">#</a> 01、MongoDB 是什么</h3><blockquote><p>MongoDB 是一个基于分布式的文件存储数据库，旨在为 Web 应用提供可扩展的高性能数据存储解决方案。</p></blockquote><p>以上引用来自于官方，不得不说，解释得文绉绉的。那就让我来换一种通俗的说法给小伙伴们解释一下，MongoDB 将数据存储为一个文档（类似于 JSON 对象），数据结构由键值对组成，类似于 Java 中的 Map，通过 key 的方式访问起来效率就高得多，对吧？这也是 MongoDB 最重要的特点。</p><p>MongoDB 提供了企业版（功能更强大）和社区版，对于我们开发者来说，拿社区版来学习和使用就足够了。MongoDB 的驱动包很多，常见的编程语言都有覆盖到，比如说 Java、JavaScript、C++、C#、Python 等等。</p><p>很多知名的互联网公司都在用 MongoDB，比如说谷歌、Facebook、eBay 等等。总之，值得信赖，小伙伴们放心入门，技多不压身啊，就当是给自己一次学习的机会。</p><h3 id="_02、安装-mongodb" tabindex="-1"><a class="header-anchor" href="#_02、安装-mongodb" aria-hidden="true">#</a> 02、安装 MongoDB</h3><p>MongoDB 针对不同的操作系统有不同的安装包，我们这篇入门的文章就以 Windows 为例吧。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mongodb/rumen-557ab648-e2c4-4309-8695-aeb7fbcba25b.jpg" alt=""></p><p>官网下载地址如下：</p><p><a href="https://www.mongodb.com/download-center/community" target="_blank" rel="noopener noreferrer">https://www.mongodb.com/download-center/community<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><p>最新的版本是 4.2.6，我选择的是安装版，msi 格式的，264M 左右。下载完就可以双击运行安装，傻瓜式的。</p><p>建议选择「Custom」自定义安装，如下图所示。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mongodb/rumen-42330ff2-598a-40bf-b252-480704c6a531.jpg" alt=""></p><p>以服务模式运行，并配置好数据和日志目录，如下图所示。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mongodb/rumen-c71a31d4-5a99-4c12-93a9-348aa79bc086.jpg" alt=""></p><p>建议取消勾选安装 MongoDB 的图形化客户端工具，否则安装速度慢到你想要去扣会手机。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mongodb/rumen-84ea8b51-6b53-4500-86fa-0dcfa61b84cd.jpg" alt=""></p><p>安装完成后进入到 bin 目录下，双击 mongo.exe 文件就可以连接到 MongoDB 服务了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mongodb/rumen-bcf34981-0c2b-4f86-94e0-711dfb307371.jpg" alt=""></p><p>1）MongoDB 的默认端口号为 27017。</p><p>2）MongoDB 的版本号为 4.2.6。</p><p>默认会连接到 test 文档（相当于数据），可以通过 db 命令查询。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mongodb/rumen-ded1c30c-9943-4061-8fa3-4562387b72cd.jpg" alt=""></p><p>还可以运行一些简单的算术运算：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mongodb/rumen-22c1d414-6ba4-47dd-beb8-f1003f21083e.jpg" alt=""></p><p>那如何停止服务呢？可以直接点击右上角的 X 号——粗暴、壁咚。</p><h3 id="_03、安装-robo-3t" tabindex="-1"><a class="header-anchor" href="#_03、安装-robo-3t" aria-hidden="true">#</a> 03、安装 Robo 3T</h3><p>Robo 3T 提供了对 MongoDB 和 SCRAM-SHA-256（升级的 mongo shell）的支持，是一款轻量级的 MongoDB 客户端工具。</p><p>下载地址如下：</p><p><a href="https://robomongo.org/download" target="_blank" rel="noopener noreferrer">https://robomongo.org/download<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><p>最新的版本是 1.3，选择 zip 格式进行下载，23M 左右。下载完成后，解压就行了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mongodb/rumen-b178e02c-23b6-4b54-92ec-3a170a8499d0.jpg" alt=""></p><p>包目录不再一一解释了，进入 bin 目录下，双击运行 robo3t.exe 文件，启动 Robo 3T 客户端。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mongodb/rumen-99717a12-c90d-4a03-941d-f3857f503d44.jpg" alt=""></p><p>点击「Create」创建一个 MongoDB 的连接。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mongodb/rumen-11866209-6a60-4a6a-9ca9-fcd9279796f6.jpg" alt=""></p><p>连接成功后，就可以操作 MongoDB 了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mongodb/rumen-753dfcd7-1557-4837-9a7e-94b2ff9db72a.jpg" alt=""></p><p>（不过，小伙伴们这时候也不太知道该怎么操作，毕竟 MongoDB 的一些相关概念还不清楚，无从下手啊）</p><h3 id="_04、mongodb-的相关概念" tabindex="-1"><a class="header-anchor" href="#_04、mongodb-的相关概念" aria-hidden="true">#</a> 04、MongoDB 的相关概念</h3><p>随着互联网的极速发展，用户数据也越来越庞大，NoSQL 数据库的发展能够很好地处理这些大的数据，MongoDB 是 NoSQL 数据库中的一个典型的代表。</p><p>说到这，可能有些小伙伴们还不知道 NoSQL 是啥意思，我简单解释一下。NoSQL 可不是没有 SQL 的意思，它实际的含义是 Not Only SQL，也就是“不仅仅是 SQL”，指的是非关系型数据库，和传统的关系型数据库 MySQL、Oracle 不同。</p><p>MongoDB 命名源于英文单词 hu<strong>mongo</strong>us，意思是「巨大无比」，可以看得出 MongoDB 的野心。MongoDB 的数据以类似于 JSON 格式的二进制文档存储：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>{
     name: &quot;沉默王二&quot;,
     age: 18,
     hobbies: [&quot;写作&quot;, &quot;敲代码&quot;]
@@ -76,6 +76,6 @@
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>Document 对象来源于 org.bson 包下，可以在实例化该对象之后通过 <code>append()</code> 方法添加对应的键值对，非常方便，就像 String 类的 <code>append()</code> 方法一样。</p><p>有了文档对象后，就可以通过 <code>insertOne()</code> 方法将文档添加到集合当中了。</p><p>4）<code>countDocuments()</code> 方法用于获取集合中的文档数目。</p><p>5）要查询文档，可以通过 <code>find()</code> 方法，它返回一个 <code>FindIterable</code> 对象，<code>first()</code> 方法可以返回当前集合中的第一个文档对象。</p><p>好了，来看一下程序的输出结果：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>集合大小：1
 文档内容：{&quot;_id&quot;: {&quot;$oid&quot;: &quot;5ebcaa76465cab3f18b93e1a&quot;}, &quot;name&quot;: &quot;沉默王二&quot;, &quot;age&quot;: &quot;18&quot;, &quot;hobbies&quot;: [&quot;写作&quot;, &quot;敲代码&quot;]}
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><p>完全符合我们的预期，perfect！</p><p>也可以通过 Robo 3T 查看“mydb”数据库，结果如下图所示。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mongodb/rumen-95d49578-b1ef-43cc-91da-c7b3a7a7517e.jpg" alt=""></p><h3 id="_06、鸣谢" tabindex="-1"><a class="header-anchor" href="#_06、鸣谢" aria-hidden="true">#</a> 06、鸣谢</h3><p>好了，我亲爱的小伙伴们，以上就是本文的全部内容了，是不是看完后很想实操一把 MongoDB，赶快行动吧！如果你在学习的过程中遇到了问题，欢迎随时和我交流，虽然我也是个菜鸟，但我有热情啊。</p><p>另外，如果你想写入门级别的文章，这篇就是最好的范例。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/mongodb/rumen.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/14 上午7:14:28</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><!----><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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class="page-title"><h1><!---->MQ：怎么确保消息100%不丢失？</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" 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class="router-link-active router-link-exact-active toc-link level3">案例解答</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/mq/100-budiushi.html#总结" class="router-link-active router-link-exact-active toc-link level3">总结</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="mq-怎么确保消息100-不丢失" tabindex="-1"><a class="header-anchor" href="#mq-怎么确保消息100-不丢失" aria-hidden="true">#</a> MQ：怎么确保消息100%不丢失？</h1><p>面试官在面试候选人时，如果发现候选人的简历中写了在项目中使用了 MQ 技术（如 Kafka、RabbitMQ、RocketMQ），基本都会抛出一个问题：在使用 MQ 的时候，怎么确保消息 100% 不丢失？</p><p>这个问题在实际工作中很常见，既能考察候选者对于 MQ 中间件技术的掌握程度，又能很好地区分候选人的能力水平。接下来，我们就从这个问题出发，探讨你应该掌握的基础知识和答题思路，以及延伸的面试考点。</p><h3 id="案例背景" tabindex="-1"><a class="header-anchor" href="#案例背景" aria-hidden="true">#</a> 案例背景</h3><p>以京东系统为例，用户在购买商品时，通常会选择用京豆抵扣一部分的金额，在这个过程中，交易服务和京豆服务通过 MQ 消息队列进行通信。在下单时，交易服务发送“扣减账户 X 100 个京豆”的消息给 MQ 消息队列，而京豆服务则在消费端消费这条命令，实现真正的扣减操作。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mq/100-budiushi-a5cbe077-5f38-44c6-9ed7-496fe1702cca.png" alt=""></p><p>那在这个过程中你会遇到什么问题呢？</p><h3 id="案例分析" tabindex="-1"><a class="header-anchor" href="#案例分析" aria-hidden="true">#</a> 案例分析</h3><p>要知道，在互联网面试中，引入 MQ 消息中间件最直接的目的是：做系统解耦合流量控制，追其根源还是为了解决互联网系统的高可用和高性能问题。</p><ul><li>系统解耦： 用 MQ 消息队列，可以隔离系统上下游环境变化带来的不稳定因素，比如京豆服务的系统需求无论如何变化，交易服务不用做任何改变，即使当京豆服务出现故障，主交易流程也可以将京豆服务降级，实现交易服务和京豆服务的解耦，做到了系统的高可用。</li><li>流量控制： 遇到秒杀等流量突增的场景，通过 MQ 还可以实现流量的“削峰填谷”的作用，可以根据下游的处理能力自动调节流量。 不过引入 MQ 虽然实现了系统解耦合流量控制，也会带来其他问题。</li></ul><p><strong>引入 MQ 消息中间件实现系统解耦，会影响系统之间数据传输的一致性</strong>。 在分布式系统中，如果两个节点之间存在数据同步，就会带来数据一致性的问题。同理，在这一讲你要解决的就是：消息生产端和消息消费端的消息数据一致性问题（也就是如何确保消息不丢失）。</p><p>而引入 MQ 消息中间件解决流量控制， 会使消费端处理能力不足从而导致消息积压，这也是你要解决的问题。</p><p>所以你能发现，问题与问题之间往往是环环相扣的，面试官会借机考察你解决问题思路的连贯性和知识体系的掌握程度。</p><p>那面对“在使用 MQ 消息队列时，如何确保消息不丢失”这个问题时，你要怎么回答呢？首先，你要分析其中有几个考点，比如：</p><ul><li>如何知道有消息丢失？</li><li>哪些环节可能丢消息？</li><li>如何确保消息不丢失？</li></ul><p><strong>候选人在回答时，要先让面试官知道你的分析思路，然后再提供解决方案</strong>：网络中的数据传输不可靠，想要解决如何不丢消息的问题，首先要知道哪些环节可能丢消息，以及我们如何知道消息是否丢失了，最后才是解决方案（而不是上来就直接说自己的解决方案）。就好比“架构设计”“架构”体现了架构师的思考过程，而“设计”才是最后的解决方案，两者缺一不可。</p><h3 id="案例解答" tabindex="-1"><a class="header-anchor" href="#案例解答" aria-hidden="true">#</a> 案例解答</h3><p>我们首先来看消息丢失的环节，一条消息从生产到消费完成这个过程，可以划分三个阶段，分别为消息生产阶段，消息存储阶段和消息消费阶段。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mq/100-budiushi-1d1962fb-cb0f-41d0-8d6d-077ba33b6125.png" alt=""></p><p><strong>消息生产阶段</strong>： 从消息被生产出来，然后提交给 MQ 的过程中，只要能正常收到 MQ Broker 的 ack 确认响应，就表示发送成功，所以只要处理好返回值和异常，这个阶段是不会出现消息丢失的。</p><p><strong>消息存储阶段</strong>： 这个阶段一般会直接交给 MQ 消息中间件来保证，但是你要了解它的原理，比如 Broker 会做副本，保证一条消息至少同步两个节点再返回 ack。</p><p><strong>消息消费阶段</strong>： 消费端从 Broker 上拉取消息，只要消费端在收到消息后，不立即发送消费确认给 Broker，而是等到执行完业务逻辑后，再发送消费确认，也能保证消息的不丢失。</p><p>方案看似万无一失，每个阶段都能保证消息的不丢失，但在分布式系统中，故障不可避免，作为消息生产端，你并不能保证 MQ 是不是弄丢了你的消息，消费者是否消费了你的消息，所以，本着 <code>Design for Failure</code> 的设计原则，你还是需要一种机制，来 Check 消息是否丢失了。</p><p><strong>紧接着，你还可以向面试官阐述怎么进行消息检测</strong>？ 总体方案解决思路为：在消息生产端，给每个发出的消息都指定一个全局唯一 ID，或者附加一个连续递增的版本号，然后在消费端做对应的版本校验。</p><p>具体怎么落地实现呢？你可以利用拦截器机制。 在生产端发送消息之前，通过拦截器将消息版本号注入消息中（版本号可以采用连续递增的 ID 生成，也可以通过分布式全局唯一 ID生成）。然后在消费端收到消息后，再通过拦截器检测版本号的连续性或消费状态，这样实现的好处是消息检测的代码不会侵入到业务代码中，可以通过单独的任务来定位丢失的消息，做进一步的排查。</p><p>这里需要你注意：如果同时存在多个消息生产端和消息消费端，通过版本号递增的方式就很难实现了，因为不能保证版本号的唯一性，此时只能通过全局唯一 ID 的方案来进行消息检测，具体的实现原理和版本号递增的方式一致。</p><p>现在，你已经知道了哪些环节（消息存储阶段、消息消费阶段）可能会出问题，并有了如何检测消息丢失的方案，然后就要给出解决防止消息丢失的设计方案。</p><p><strong>回答完“如何确保消息不会丢失？” 之后，面试官通常会追问“怎么解决消息被重复消费的问题？</strong>”</p><p>比如：在消息消费的过程中，如果出现失败的情况，通过补偿的机制发送方会执行重试，重试的过程就有可能产生重复的消息，那么如何解决这个问题？</p><p>这个问题其实可以换一种说法，就是如何解决消费端幂等性问题（幂等性，就是一条命令，任意多次执行所产生的影响均与一次执行的影响相同），只要消费端具备了幂等性，那么重复消费消息的问题也就解决了。</p><p>我们还是来看扣减京豆的例子，将账户 X 的金豆个数扣减 100 个，在这个例子中，我们可以通过改造业务逻辑，让它具备幂等性。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mq/100-budiushi-9d864624-2136-4770-942b-9a5f70c2aaf6.png" alt=""></p><p>最简单的实现方案，就是在数据库中建一张消息日志表， 这个表有两个字段：消息 ID 和消息执行状态。这样，我们消费消息的逻辑可以变为：在消息日志表中增加一条消息记录，然后再根据消息记录，异步操作更新用户京豆余额。</p><p>因为我们每次都会在插入之前检查是否消息已存在，所以就不会出现一条消息被执行多次的情况，这样就实现了一个幂等的操作。当然，基于这个思路，不仅可以使用关系型数据库，也可以通过 Redis 来代替数据库实现唯一约束的方案。</p><p>在这里我多说一句，想要解决“消息丢失”和“消息重复消费”的问题，有一个前提条件就是要实现一个全局唯一 ID 生成的技术方案。这也是面试官喜欢考察的问题，你也要掌握。</p><p>在分布式系统中，全局唯一 ID 生成的实现方法有数据库自增主键、UUID、Redis，Twitter-Snowflake 算法，我总结了几种方案的特点，你可以参考下。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mq/100-budiushi-0622a500-83ef-4b8f-96d3-68c649d17311.png" alt=""></p><p>我提醒你注意，无论哪种方法，如果你想同时满足简单、高可用和高性能，就要有取舍，所以你要站在实际的业务中，说明你的选型所考虑的平衡点是什么。我个人在业务中比较倾向于选择 Snowflake 算法，在项目中也进行了一定的改造，主要是让算法中的 ID 生成规则更加符合业务特点，以及优化诸如时钟回拨等问题。</p><p>当然，除了“怎么解决消息被重复消费的问题？”之外，面试官还会问到你“消息积压”。 原因在于消息积压反映的是性能问题，解决消息积压问题，可以说明候选者有能力处理高并发场景下的消费能力问题。</p><p>你在解答这个问题时，依旧要传递给面试官一个这样的思考过程： 如果出现积压，那一定是性能问题，想要解决消息从生产到消费上的性能问题，就首先要知道哪些环节可能出现消息积压，然后在考虑如何解决。</p><p>因为消息发送之后才会出现积压的问题，所以和消息生产端没有关系，又因为绝大部分的消息队列单节点都能达到每秒钟几万的处理能力，相对于业务逻辑来说，性能不会出现在中间件的消息存储上面。毫无疑问，出问题的肯定是消息消费阶段，那么从消费端入手，如何回答呢？</p><p>如果是线上突发问题，要临时扩容，增加消费端的数量，与此同时，降级一些非核心的业务。通过扩容和降级承担流量，这是为了表明你对应急问题的处理能力。</p><p>其次，才是排查解决异常问题，如通过监控，日志等手段分析是否消费端的业务逻辑代码出现了问题，优化消费端的业务处理逻辑。</p><p>最后，如果是消费端的处理能力不足，可以通过水平扩容来提供消费端的并发处理能力，但这里有一个考点需要特别注意， 那就是在扩容消费者的实例数的同时，必须同步扩容主题 Topic 的分区数量，确保消费者的实例数和分区数相等。如果消费者的实例数超过了分区数，由于分区是单线程消费，所以这样的扩容就没有效果。</p><p>比如在 Kafka 中，一个 Topic 可以配置多个 Partition（分区），数据会被写入到多个分区中，但在消费的时候，Kafka 约定一个分区只能被一个消费者消费，Topic 的分区数量决定了消费的能力，所以，可以通过增加分区来提高消费者的处理能力。</p><h3 id="总结" tabindex="-1"><a class="header-anchor" href="#总结" aria-hidden="true">#</a> 总结</h3><p>至此，我们讲解了 MQ 消息队列的热门问题的解决方案，无论是初中级还是高级研发工程师，本篇文章的内容都是你需要掌握的，你都可以从这几点出发，与面试官进行友好的交流。我来总结一下今天的重点内容。</p><ul><li><p><strong>如何确保消息不会丢失</strong>？ 你要知道一条消息从发送到消费的每个阶段，是否存在丢消息，以及如何监控消息是否丢失，最后才是如何解决问题，方案可以基于“ MQ 的可靠消息投递 ”的方式。</p></li><li><p><strong>如何保证消息不被重复消费</strong>？ 在进行消息补偿的时候，一定会存在重复消息的情况，那么如何实现消费端的幂等性就这道题的考点。</p></li><li><p><strong>如何处理消息积压问题</strong>？ 这道题的考点就是如何通过 MQ 实现真正的高性能，回答的思路是，本着解决线上异常为最高优先级，然后通过监控和日志进行排查并优化业务逻辑，最后是扩容消费端和分片的数量。</p></li></ul><p>在回答问题的时候，你需要特别注意的是，让面试官了解到你的思维过程，这种解决问题的能力是面试官更为看中的，比你直接回答一道面试题更有价值。</p><p>另外，如果你应聘的部门是基础架构部，那么除了要掌握本讲中的常见问题的主线知识以外，还要掌握消息中间件的其他知识体系，如：</p><ul><li>如何选型消息中间件？</li><li>消息中间件中的队列模型与发布订阅模型的区别？</li><li>为什么消息队列能实现高吞吐？</li><li>序列化、传输协议，以及内存管理等问题</li><li>… &gt;</li></ul><hr><blockquote><p>原文链接：http://t.hk.uy/Ue6</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/mq/100-budiushi.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg 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right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->MQ：怎么确保消息100%不丢失？</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 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33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月8日</span><meta property="datePublished" content="2022-03-08T09:15:16.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category4" role>求职面试</li><meta property="articleSection" content="求职面试"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag7" role>面试题集合</li></ul><meta property="keywords" content="面试题集合"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 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class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/mq/100-budiushi.html#案例背景" class="router-link-active router-link-exact-active toc-link level3">案例背景</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/mq/100-budiushi.html#案例分析" class="router-link-active router-link-exact-active toc-link level3">案例分析</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/mq/100-budiushi.html#案例解答" class="router-link-active router-link-exact-active toc-link level3">案例解答</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/mq/100-budiushi.html#总结" class="router-link-active router-link-exact-active toc-link level3">总结</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="mq-怎么确保消息100-不丢失" tabindex="-1"><a class="header-anchor" href="#mq-怎么确保消息100-不丢失" aria-hidden="true">#</a> MQ：怎么确保消息100%不丢失？</h1><p>面试官在面试候选人时，如果发现候选人的简历中写了在项目中使用了 MQ 技术（如 Kafka、RabbitMQ、RocketMQ），基本都会抛出一个问题：在使用 MQ 的时候，怎么确保消息 100% 不丢失？</p><p>这个问题在实际工作中很常见，既能考察候选者对于 MQ 中间件技术的掌握程度，又能很好地区分候选人的能力水平。接下来，我们就从这个问题出发，探讨你应该掌握的基础知识和答题思路，以及延伸的面试考点。</p><h3 id="案例背景" tabindex="-1"><a class="header-anchor" href="#案例背景" aria-hidden="true">#</a> 案例背景</h3><p>以京东系统为例，用户在购买商品时，通常会选择用京豆抵扣一部分的金额，在这个过程中，交易服务和京豆服务通过 MQ 消息队列进行通信。在下单时，交易服务发送“扣减账户 X 100 个京豆”的消息给 MQ 消息队列，而京豆服务则在消费端消费这条命令，实现真正的扣减操作。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mq/100-budiushi-a5cbe077-5f38-44c6-9ed7-496fe1702cca.png" alt=""></p><p>那在这个过程中你会遇到什么问题呢？</p><h3 id="案例分析" tabindex="-1"><a class="header-anchor" href="#案例分析" aria-hidden="true">#</a> 案例分析</h3><p>要知道，在互联网面试中，引入 MQ 消息中间件最直接的目的是：做系统解耦合流量控制，追其根源还是为了解决互联网系统的高可用和高性能问题。</p><ul><li>系统解耦： 用 MQ 消息队列，可以隔离系统上下游环境变化带来的不稳定因素，比如京豆服务的系统需求无论如何变化，交易服务不用做任何改变，即使当京豆服务出现故障，主交易流程也可以将京豆服务降级，实现交易服务和京豆服务的解耦，做到了系统的高可用。</li><li>流量控制： 遇到秒杀等流量突增的场景，通过 MQ 还可以实现流量的“削峰填谷”的作用，可以根据下游的处理能力自动调节流量。 不过引入 MQ 虽然实现了系统解耦合流量控制，也会带来其他问题。</li></ul><p><strong>引入 MQ 消息中间件实现系统解耦，会影响系统之间数据传输的一致性</strong>。 在分布式系统中，如果两个节点之间存在数据同步，就会带来数据一致性的问题。同理，在这一讲你要解决的就是：消息生产端和消息消费端的消息数据一致性问题（也就是如何确保消息不丢失）。</p><p>而引入 MQ 消息中间件解决流量控制， 会使消费端处理能力不足从而导致消息积压，这也是你要解决的问题。</p><p>所以你能发现，问题与问题之间往往是环环相扣的，面试官会借机考察你解决问题思路的连贯性和知识体系的掌握程度。</p><p>那面对“在使用 MQ 消息队列时，如何确保消息不丢失”这个问题时，你要怎么回答呢？首先，你要分析其中有几个考点，比如：</p><ul><li>如何知道有消息丢失？</li><li>哪些环节可能丢消息？</li><li>如何确保消息不丢失？</li></ul><p><strong>候选人在回答时，要先让面试官知道你的分析思路，然后再提供解决方案</strong>：网络中的数据传输不可靠，想要解决如何不丢消息的问题，首先要知道哪些环节可能丢消息，以及我们如何知道消息是否丢失了，最后才是解决方案（而不是上来就直接说自己的解决方案）。就好比“架构设计”“架构”体现了架构师的思考过程，而“设计”才是最后的解决方案，两者缺一不可。</p><h3 id="案例解答" tabindex="-1"><a class="header-anchor" href="#案例解答" aria-hidden="true">#</a> 案例解答</h3><p>我们首先来看消息丢失的环节，一条消息从生产到消费完成这个过程，可以划分三个阶段，分别为消息生产阶段，消息存储阶段和消息消费阶段。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mq/100-budiushi-1d1962fb-cb0f-41d0-8d6d-077ba33b6125.png" alt=""></p><p><strong>消息生产阶段</strong>： 从消息被生产出来，然后提交给 MQ 的过程中，只要能正常收到 MQ Broker 的 ack 确认响应，就表示发送成功，所以只要处理好返回值和异常，这个阶段是不会出现消息丢失的。</p><p><strong>消息存储阶段</strong>： 这个阶段一般会直接交给 MQ 消息中间件来保证，但是你要了解它的原理，比如 Broker 会做副本，保证一条消息至少同步两个节点再返回 ack。</p><p><strong>消息消费阶段</strong>： 消费端从 Broker 上拉取消息，只要消费端在收到消息后，不立即发送消费确认给 Broker，而是等到执行完业务逻辑后，再发送消费确认，也能保证消息的不丢失。</p><p>方案看似万无一失，每个阶段都能保证消息的不丢失，但在分布式系统中，故障不可避免，作为消息生产端，你并不能保证 MQ 是不是弄丢了你的消息，消费者是否消费了你的消息，所以，本着 <code>Design for Failure</code> 的设计原则，你还是需要一种机制，来 Check 消息是否丢失了。</p><p><strong>紧接着，你还可以向面试官阐述怎么进行消息检测</strong>？ 总体方案解决思路为：在消息生产端，给每个发出的消息都指定一个全局唯一 ID，或者附加一个连续递增的版本号，然后在消费端做对应的版本校验。</p><p>具体怎么落地实现呢？你可以利用拦截器机制。 在生产端发送消息之前，通过拦截器将消息版本号注入消息中（版本号可以采用连续递增的 ID 生成，也可以通过分布式全局唯一 ID生成）。然后在消费端收到消息后，再通过拦截器检测版本号的连续性或消费状态，这样实现的好处是消息检测的代码不会侵入到业务代码中，可以通过单独的任务来定位丢失的消息，做进一步的排查。</p><p>这里需要你注意：如果同时存在多个消息生产端和消息消费端，通过版本号递增的方式就很难实现了，因为不能保证版本号的唯一性，此时只能通过全局唯一 ID 的方案来进行消息检测，具体的实现原理和版本号递增的方式一致。</p><p>现在，你已经知道了哪些环节（消息存储阶段、消息消费阶段）可能会出问题，并有了如何检测消息丢失的方案，然后就要给出解决防止消息丢失的设计方案。</p><p><strong>回答完“如何确保消息不会丢失？” 之后，面试官通常会追问“怎么解决消息被重复消费的问题？</strong>”</p><p>比如：在消息消费的过程中，如果出现失败的情况，通过补偿的机制发送方会执行重试，重试的过程就有可能产生重复的消息，那么如何解决这个问题？</p><p>这个问题其实可以换一种说法，就是如何解决消费端幂等性问题（幂等性，就是一条命令，任意多次执行所产生的影响均与一次执行的影响相同），只要消费端具备了幂等性，那么重复消费消息的问题也就解决了。</p><p>我们还是来看扣减京豆的例子，将账户 X 的金豆个数扣减 100 个，在这个例子中，我们可以通过改造业务逻辑，让它具备幂等性。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mq/100-budiushi-9d864624-2136-4770-942b-9a5f70c2aaf6.png" alt=""></p><p>最简单的实现方案，就是在数据库中建一张消息日志表， 这个表有两个字段：消息 ID 和消息执行状态。这样，我们消费消息的逻辑可以变为：在消息日志表中增加一条消息记录，然后再根据消息记录，异步操作更新用户京豆余额。</p><p>因为我们每次都会在插入之前检查是否消息已存在，所以就不会出现一条消息被执行多次的情况，这样就实现了一个幂等的操作。当然，基于这个思路，不仅可以使用关系型数据库，也可以通过 Redis 来代替数据库实现唯一约束的方案。</p><p>在这里我多说一句，想要解决“消息丢失”和“消息重复消费”的问题，有一个前提条件就是要实现一个全局唯一 ID 生成的技术方案。这也是面试官喜欢考察的问题，你也要掌握。</p><p>在分布式系统中，全局唯一 ID 生成的实现方法有数据库自增主键、UUID、Redis，Twitter-Snowflake 算法，我总结了几种方案的特点，你可以参考下。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mq/100-budiushi-0622a500-83ef-4b8f-96d3-68c649d17311.png" alt=""></p><p>我提醒你注意，无论哪种方法，如果你想同时满足简单、高可用和高性能，就要有取舍，所以你要站在实际的业务中，说明你的选型所考虑的平衡点是什么。我个人在业务中比较倾向于选择 Snowflake 算法，在项目中也进行了一定的改造，主要是让算法中的 ID 生成规则更加符合业务特点，以及优化诸如时钟回拨等问题。</p><p>当然，除了“怎么解决消息被重复消费的问题？”之外，面试官还会问到你“消息积压”。 原因在于消息积压反映的是性能问题，解决消息积压问题，可以说明候选者有能力处理高并发场景下的消费能力问题。</p><p>你在解答这个问题时，依旧要传递给面试官一个这样的思考过程： 如果出现积压，那一定是性能问题，想要解决消息从生产到消费上的性能问题，就首先要知道哪些环节可能出现消息积压，然后在考虑如何解决。</p><p>因为消息发送之后才会出现积压的问题，所以和消息生产端没有关系，又因为绝大部分的消息队列单节点都能达到每秒钟几万的处理能力，相对于业务逻辑来说，性能不会出现在中间件的消息存储上面。毫无疑问，出问题的肯定是消息消费阶段，那么从消费端入手，如何回答呢？</p><p>如果是线上突发问题，要临时扩容，增加消费端的数量，与此同时，降级一些非核心的业务。通过扩容和降级承担流量，这是为了表明你对应急问题的处理能力。</p><p>其次，才是排查解决异常问题，如通过监控，日志等手段分析是否消费端的业务逻辑代码出现了问题，优化消费端的业务处理逻辑。</p><p>最后，如果是消费端的处理能力不足，可以通过水平扩容来提供消费端的并发处理能力，但这里有一个考点需要特别注意， 那就是在扩容消费者的实例数的同时，必须同步扩容主题 Topic 的分区数量，确保消费者的实例数和分区数相等。如果消费者的实例数超过了分区数，由于分区是单线程消费，所以这样的扩容就没有效果。</p><p>比如在 Kafka 中，一个 Topic 可以配置多个 Partition（分区），数据会被写入到多个分区中，但在消费的时候，Kafka 约定一个分区只能被一个消费者消费，Topic 的分区数量决定了消费的能力，所以，可以通过增加分区来提高消费者的处理能力。</p><h3 id="总结" tabindex="-1"><a class="header-anchor" href="#总结" aria-hidden="true">#</a> 总结</h3><p>至此，我们讲解了 MQ 消息队列的热门问题的解决方案，无论是初中级还是高级研发工程师，本篇文章的内容都是你需要掌握的，你都可以从这几点出发，与面试官进行友好的交流。我来总结一下今天的重点内容。</p><ul><li><p><strong>如何确保消息不会丢失</strong>？ 你要知道一条消息从发送到消费的每个阶段，是否存在丢消息，以及如何监控消息是否丢失，最后才是如何解决问题，方案可以基于“ MQ 的可靠消息投递 ”的方式。</p></li><li><p><strong>如何保证消息不被重复消费</strong>？ 在进行消息补偿的时候，一定会存在重复消息的情况，那么如何实现消费端的幂等性就这道题的考点。</p></li><li><p><strong>如何处理消息积压问题</strong>？ 这道题的考点就是如何通过 MQ 实现真正的高性能，回答的思路是，本着解决线上异常为最高优先级，然后通过监控和日志进行排查并优化业务逻辑，最后是扩容消费端和分片的数量。</p></li></ul><p>在回答问题的时候，你需要特别注意的是，让面试官了解到你的思维过程，这种解决问题的能力是面试官更为看中的，比你直接回答一道面试题更有价值。</p><p>另外，如果你应聘的部门是基础架构部，那么除了要掌握本讲中的常见问题的主线知识以外，还要掌握消息中间件的其他知识体系，如：</p><ul><li>如何选型消息中间件？</li><li>消息中间件中的队列模型与发布订阅模型的区别？</li><li>为什么消息队列能实现高吞吐？</li><li>序列化、传输协议，以及内存管理等问题</li><li>… &gt;</li></ul><hr><blockquote><p>原文链接：http://t.hk.uy/Ue6</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a 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right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->RabbitMQ入门教程（概念、应用场景、安装、使用）</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" 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0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category5" role>Java企业级开发</li><meta property="articleSection" content="Java企业级开发"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag8" role>消息队列</li></ul><meta property="keywords" content="消息队列"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 9 分钟</span><meta property="timeRequired" content="PT9M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/mq/rabbitmq-rumen.html#_01、rabbitmq-是什么" class="router-link-active router-link-exact-active toc-link level3">01、RabbitMQ 是什么</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/mq/rabbitmq-rumen.html#_02、安装-erlang" class="router-link-active router-link-exact-active toc-link level3">02、安装 Erlang</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/mq/rabbitmq-rumen.html#_03、安装-rabbitmq" class="router-link-active router-link-exact-active toc-link level3">03、安装 RabbitMQ</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/mq/rabbitmq-rumen.html#_04、在-java-中使用-rabbitmq" class="router-link-active router-link-exact-active toc-link level3">04、在 Java 中使用 RabbitMQ</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="rabbitmq入门教程-概念、应用场景、安装、使用" tabindex="-1"><a class="header-anchor" href="#rabbitmq入门教程-概念、应用场景、安装、使用" aria-hidden="true">#</a> RabbitMQ入门教程（概念、应用场景、安装、使用）</h1><p>人一辈子最值得炫耀的不应该是你的财富有多少（虽然这话说得有点违心，呵呵），而是你的学习能力。技术更新迭代的速度非常快，那作为程序员，我们就应该拥有一颗拥抱变化的心，积极地跟进。</p><p>在 RabbitMQ 入门之前，我已经入门了 <a href="https://mp.weixin.qq.com/s/NPJkMy5RppyFk9QhzHxhrw" target="_blank" rel="noopener noreferrer">Redis<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>、<a href="https://mp.weixin.qq.com/s/ZjsZxle7m_dfmVwVkq2ayg" target="_blank" rel="noopener noreferrer">Elasticsearch<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a> 和 <a href="https://mp.weixin.qq.com/s/qz0sNOFeS0GTW-H9cdnbJg" target="_blank" rel="noopener noreferrer">MongoDB<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，这让我感觉自己富有极客精神，非常良好。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mq/rabbitmq-rumen-d416cab5-69bd-46a6-b65c-8cf3b6667136.jpg" alt=""></p><p>小伙伴们在继续阅读之前，我必须要声明一点，我对 RabbitMQ 并没有进行很深入的研究，仅仅是因为要用，就学一下。但作为一名负责任的技术博主，我是动了心的，这篇入门教程，小伙伴们读完后绝对会感到满意，忍不住无情地点赞，以及赤裸裸地转发。</p><p>当然了，小伙伴们遇到文章中有错误的地方，不要手下留情，可以组团过来捶我，但要保证一点，不要打脸，我怕毁容。</p><h3 id="_01、rabbitmq-是什么" tabindex="-1"><a class="header-anchor" href="#_01、rabbitmq-是什么" aria-hidden="true">#</a> 01、RabbitMQ 是什么</h3><p>首先，我知道，Rabbit 是一只兔子（哎呀妈呀，忍不住秀了一波自己的英语功底），可爱的形象已经跃然于我的脑海中了。那 MQ 又是什么呢？是 Message Queue 的首字母缩写，也就是说 RabbitMQ 是一款开源的消息队列系统。</p><p>RabbitMQ 的主要特点在于健壮性好、易于使用、高性能、高并发、集群易扩展，以及强大的开源社区支持。反正就是很牛逼的样子。</p><p>九年前我做大宗期货交易的时候，也需要消息推送，那时候还不知道去找这种现成的中间件，就用自定义的队列实现，结果搞了不少 bug，有些到现在还没有解决，真的是不堪回首的往事啊。</p><p>下图是 RabbitMQ 的消息模型图（来源于网络，侵删），小伙伴们来感受下。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mq/rabbitmq-rumen-0e8d83f8-fdf0-4755-9131-1f5c775ca010.jpg" alt=""></p><p>1）P 是 Producer，代表生产者，也就是消息的发送者，可以将消息发送到 X</p><p>2）X 是 Exchange（为啥不是 E，我也很好奇），代表交换机，可以接受生产者发送的消息，并根据路由将消息发送给指定的队列</p><p>3）Q 是 Queue，也就是队列，存放交换机发送来的消息</p><p>4）C 是 Consumer，代表消费者，也就是消息的接受者，从队列中获取消息</p><p>听我这样一解释，是不是对 RabbitMQ 的印象就很具象化了？小伙伴们，学起来吧！</p><h3 id="_02、安装-erlang" tabindex="-1"><a class="header-anchor" href="#_02、安装-erlang" aria-hidden="true">#</a> 02、安装 Erlang</h3><p>咦，怎么不是安装 RabbitMQ 啊？先来看看官方的解释。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mq/rabbitmq-rumen-9012f7d7-01bf-437a-ac98-f6a71390105e.jpg" alt=""></p><p>英文看不太懂，没关系，我来补充两句人话。RabbitMQ 服务器是用 Erlang 语言编写的，它的安装包里并没有集成 Erlang 的环境，因此需要先安装 Erlang。小伙伴们不要担心，Erlang 安装起来没有任何难度。</p><p>Erlang 下载地址如下：</p><p><a href="https://erlang.org/download/otp_versions_tree.html" target="_blank" rel="noopener noreferrer">https://erlang.org/download/otp_versions_tree.html<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><p>最新的版本是 23.0.1，我选择的是 64 位的版本，104M 左右。下载完就可以双击运行安装，傻瓜式的。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mq/rabbitmq-rumen-644fafa4-a4bc-45a2-831a-12deda958122.jpg" alt=""></p><p>需要注意的是，我安装的过程中，电脑重启了一次，好像要安装一个什么库，重启之前忘记保存图片了（sorry）。重启后，重新双击运行 otp_win64_23.0.1.exe 文件完成 Erlang 安装。</p><h3 id="_03、安装-rabbitmq" tabindex="-1"><a class="header-anchor" href="#_03、安装-rabbitmq" aria-hidden="true">#</a> 03、安装 RabbitMQ</h3><p>Erlang 安装成功后，就可以安装 RabbitMQ 了。下载地址如下所示：</p><p><a href="https://www.rabbitmq.com/install-windows.html" target="_blank" rel="noopener noreferrer">https://www.rabbitmq.com/install-windows.html<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><p>找到下图中的位置，选择红色框中的文件进行下载。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mq/rabbitmq-rumen-43268557-1240-4ed4-9883-de93668f1f04.jpg" alt=""></p><p>安装包只有 16.5M 大小，还是非常轻量级的。下载完后直接双击运行 exe 文件就可以傻瓜式地安装了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mq/rabbitmq-rumen-b3343075-f9a8-441f-b266-0750df82a1c6.jpg" alt=""></p><p>安装成功后，就可以将 RabbitMQ 作为 Windows 服务启动，可以从“开始”菜单管理 RabbitMQ Windows 服务。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mq/rabbitmq-rumen-6f185cbd-b3ab-432a-85df-be3a93450533.jpg" alt=""></p><p>点击「RabbitMQ Command Prompt (sbin dir)」，进入命令行，输入 <code>rabbitmqctl.bat status</code> 可确认 RabbitMQ 的启动状态。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mq/rabbitmq-rumen-d9407f52-3585-4c3c-af2f-7b7c4ec45461.jpg" alt=""></p><p>可以看到 RabbitMQ 一些状态信息：</p><ul><li>进程 ID，也就是 PID 为 2816</li><li>操作系统为 Windows</li><li>当前的版本号为 3.8.4</li><li>Erlang 的配置信息</li></ul><p>命令行界面看起来不够优雅，因此我们可以输入以下命令来启用客户端管理 UI 插件：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>rabbitmq-plugins enable rabbitmq_management
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router-link-exact-active nav-link sidebar-link heading" aria-label="04、在 Java 中使用 RabbitMQ"><!---->04、在 Java 中使用 RabbitMQ<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/mq/100-budiushi.html" class="nav-link sidebar-link sidebar-page" aria-label="如何保障消息不丢失"><!---->如何保障消息不丢失<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->RabbitMQ入门教程（概念、应用场景、安装、使用）</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月17日</span><meta property="datePublished" content="2022-03-17T03:18:03.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 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18.547z"></path></svg><ul class="categories-wrapper"><li class="category category5" role>Java企业级开发</li><meta property="articleSection" content="Java企业级开发"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag8" role>消息队列</li></ul><meta property="keywords" content="消息队列"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 9 分钟</span><meta property="timeRequired" content="PT9M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/mq/rabbitmq-rumen.html#_01、rabbitmq-是什么" class="router-link-active router-link-exact-active toc-link level3">01、RabbitMQ 是什么</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/mq/rabbitmq-rumen.html#_02、安装-erlang" class="router-link-active router-link-exact-active toc-link level3">02、安装 Erlang</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/mq/rabbitmq-rumen.html#_03、安装-rabbitmq" class="router-link-active router-link-exact-active toc-link level3">03、安装 RabbitMQ</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/mq/rabbitmq-rumen.html#_04、在-java-中使用-rabbitmq" class="router-link-active router-link-exact-active toc-link level3">04、在 Java 中使用 RabbitMQ</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="rabbitmq入门教程-概念、应用场景、安装、使用" tabindex="-1"><a class="header-anchor" href="#rabbitmq入门教程-概念、应用场景、安装、使用" aria-hidden="true">#</a> RabbitMQ入门教程（概念、应用场景、安装、使用）</h1><p>人一辈子最值得炫耀的不应该是你的财富有多少（虽然这话说得有点违心，呵呵），而是你的学习能力。技术更新迭代的速度非常快，那作为程序员，我们就应该拥有一颗拥抱变化的心，积极地跟进。</p><p>在 RabbitMQ 入门之前，我已经入门了 <a href="https://mp.weixin.qq.com/s/NPJkMy5RppyFk9QhzHxhrw" target="_blank" rel="noopener noreferrer">Redis<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>、<a href="https://mp.weixin.qq.com/s/ZjsZxle7m_dfmVwVkq2ayg" target="_blank" rel="noopener noreferrer">Elasticsearch<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a> 和 <a href="https://mp.weixin.qq.com/s/qz0sNOFeS0GTW-H9cdnbJg" target="_blank" rel="noopener noreferrer">MongoDB<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，这让我感觉自己富有极客精神，非常良好。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mq/rabbitmq-rumen-d416cab5-69bd-46a6-b65c-8cf3b6667136.jpg" alt=""></p><p>小伙伴们在继续阅读之前，我必须要声明一点，我对 RabbitMQ 并没有进行很深入的研究，仅仅是因为要用，就学一下。但作为一名负责任的技术博主，我是动了心的，这篇入门教程，小伙伴们读完后绝对会感到满意，忍不住无情地点赞，以及赤裸裸地转发。</p><p>当然了，小伙伴们遇到文章中有错误的地方，不要手下留情，可以组团过来捶我，但要保证一点，不要打脸，我怕毁容。</p><h3 id="_01、rabbitmq-是什么" tabindex="-1"><a class="header-anchor" href="#_01、rabbitmq-是什么" aria-hidden="true">#</a> 01、RabbitMQ 是什么</h3><p>首先，我知道，Rabbit 是一只兔子（哎呀妈呀，忍不住秀了一波自己的英语功底），可爱的形象已经跃然于我的脑海中了。那 MQ 又是什么呢？是 Message Queue 的首字母缩写，也就是说 RabbitMQ 是一款开源的消息队列系统。</p><p>RabbitMQ 的主要特点在于健壮性好、易于使用、高性能、高并发、集群易扩展，以及强大的开源社区支持。反正就是很牛逼的样子。</p><p>九年前我做大宗期货交易的时候，也需要消息推送，那时候还不知道去找这种现成的中间件，就用自定义的队列实现，结果搞了不少 bug，有些到现在还没有解决，真的是不堪回首的往事啊。</p><p>下图是 RabbitMQ 的消息模型图（来源于网络，侵删），小伙伴们来感受下。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mq/rabbitmq-rumen-0e8d83f8-fdf0-4755-9131-1f5c775ca010.jpg" alt=""></p><p>1）P 是 Producer，代表生产者，也就是消息的发送者，可以将消息发送到 X</p><p>2）X 是 Exchange（为啥不是 E，我也很好奇），代表交换机，可以接受生产者发送的消息，并根据路由将消息发送给指定的队列</p><p>3）Q 是 Queue，也就是队列，存放交换机发送来的消息</p><p>4）C 是 Consumer，代表消费者，也就是消息的接受者，从队列中获取消息</p><p>听我这样一解释，是不是对 RabbitMQ 的印象就很具象化了？小伙伴们，学起来吧！</p><h3 id="_02、安装-erlang" tabindex="-1"><a class="header-anchor" href="#_02、安装-erlang" aria-hidden="true">#</a> 02、安装 Erlang</h3><p>咦，怎么不是安装 RabbitMQ 啊？先来看看官方的解释。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mq/rabbitmq-rumen-9012f7d7-01bf-437a-ac98-f6a71390105e.jpg" alt=""></p><p>英文看不太懂，没关系，我来补充两句人话。RabbitMQ 服务器是用 Erlang 语言编写的，它的安装包里并没有集成 Erlang 的环境，因此需要先安装 Erlang。小伙伴们不要担心，Erlang 安装起来没有任何难度。</p><p>Erlang 下载地址如下：</p><p><a href="https://erlang.org/download/otp_versions_tree.html" target="_blank" rel="noopener noreferrer">https://erlang.org/download/otp_versions_tree.html<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><p>最新的版本是 23.0.1，我选择的是 64 位的版本，104M 左右。下载完就可以双击运行安装，傻瓜式的。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mq/rabbitmq-rumen-644fafa4-a4bc-45a2-831a-12deda958122.jpg" alt=""></p><p>需要注意的是，我安装的过程中，电脑重启了一次，好像要安装一个什么库，重启之前忘记保存图片了（sorry）。重启后，重新双击运行 otp_win64_23.0.1.exe 文件完成 Erlang 安装。</p><h3 id="_03、安装-rabbitmq" tabindex="-1"><a class="header-anchor" href="#_03、安装-rabbitmq" aria-hidden="true">#</a> 03、安装 RabbitMQ</h3><p>Erlang 安装成功后，就可以安装 RabbitMQ 了。下载地址如下所示：</p><p><a href="https://www.rabbitmq.com/install-windows.html" target="_blank" rel="noopener noreferrer">https://www.rabbitmq.com/install-windows.html<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><p>找到下图中的位置，选择红色框中的文件进行下载。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mq/rabbitmq-rumen-43268557-1240-4ed4-9883-de93668f1f04.jpg" alt=""></p><p>安装包只有 16.5M 大小，还是非常轻量级的。下载完后直接双击运行 exe 文件就可以傻瓜式地安装了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mq/rabbitmq-rumen-b3343075-f9a8-441f-b266-0750df82a1c6.jpg" alt=""></p><p>安装成功后，就可以将 RabbitMQ 作为 Windows 服务启动，可以从“开始”菜单管理 RabbitMQ Windows 服务。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mq/rabbitmq-rumen-6f185cbd-b3ab-432a-85df-be3a93450533.jpg" alt=""></p><p>点击「RabbitMQ Command Prompt (sbin dir)」，进入命令行，输入 <code>rabbitmqctl.bat status</code> 可确认 RabbitMQ 的启动状态。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mq/rabbitmq-rumen-d9407f52-3585-4c3c-af2f-7b7c4ec45461.jpg" alt=""></p><p>可以看到 RabbitMQ 一些状态信息：</p><ul><li>进程 ID，也就是 PID 为 2816</li><li>操作系统为 Windows</li><li>当前的版本号为 3.8.4</li><li>Erlang 的配置信息</li></ul><p>命令行界面看起来不够优雅，因此我们可以输入以下命令来启用客户端管理 UI 插件：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>rabbitmq-plugins enable rabbitmq_management
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>看到以下信息就可以确认插件启用成功了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mq/rabbitmq-rumen-3479f2b1-5089-4d73-a6fa-f673989766b7.jpg" alt=""></p><p>在浏览器地址栏输入 <a href="http://localhost:15672/" target="_blank" rel="noopener noreferrer">http://localhost:15672/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a> 可以进入管理端界面，如下图所示：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mq/rabbitmq-rumen-cbad5128-e675-4da7-a5dd-fe9bb303f5f0.jpg" alt=""></p><h3 id="_04、在-java-中使用-rabbitmq" tabindex="-1"><a class="header-anchor" href="#_04、在-java-中使用-rabbitmq" aria-hidden="true">#</a> 04、在 Java 中使用 RabbitMQ</h3><p>有些小伙伴可能会问，“二哥，我是一名 Java 程序员，我该如何在 Java 中使用 RabbitMQ 呢？”这个问题问得好，这就来，这就来。</p><p>第一步，在项目中添加 RabbitMQ 客户端依赖：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
     &lt;groupId&gt;com.rabbitmq&lt;/groupId&gt;
     &lt;artifactId&gt;amqp-client&lt;/artifactId&gt;
@@ -91,6 +91,6 @@
  [小巷] 接收到的消息 &#39;小巷，我喜欢你。&#39;
  [小巷] 接收到的消息 &#39;小巷，我喜欢你。&#39;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><ul><li><p>第三个参数为 DeliverCallback，也就是消息的回调函数。</p></li><li><p>第四个参数为 CancelCallback，我暂时没搞清楚是干嘛的。</p></li></ul><p>在消息发送的过程中，也可以使用 RabbitMQ 的管理面板查看到消息的走势图，如下所示。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mq/rabbitmq-rumen-0dcb67b3-521f-4d91-9e46-590e93631b35.jpg" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/mq/rabbitmq-rumen.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/14 上午7:14:28</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><!----><a href="/mq/100-budiushi.html" class="nav-link next" aria-label="如何保障消息不丢失"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">如何保障消息不丢失<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/mysql/deletedb-binlog-weiguanjishu.html#一、mysql-主备是什么" class="router-link-active router-link-exact-active toc-link level3">一、MySQL 主备是什么？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/mysql/deletedb-binlog-weiguanjishu.html#二、主从同步" class="router-link-active router-link-exact-active toc-link level3">二、主从同步</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/mysql/deletedb-binlog-weiguanjishu.html#三、开启-binlog" class="router-link-active router-link-exact-active toc-link level3">三、开启 binlog</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/mysql/deletedb-binlog-weiguanjishu.html#四、恢复数据" class="router-link-active router-link-exact-active toc-link level3">四、恢复数据</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><p>大家好，我是二哥呀~我们都知道，数据非常重要。</p><p>网上也经常看到一些段子，某公司程序员对工作不满，删库跑路，老板损失惨重，欲哭无泪。这不前几天又爆出一例，<strong>某程序员离职当天删库跑路</strong>！</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mysql/deletedb-binlog-weiguanjishu-1.png" alt=""></p><p>那么有没有什么解决方案？即使数据库真的被删了，也有备份数据，能快速恢复。甚至可以做到实时热备，即使内部炸掉外部用户也感知不到，一片风平浪静。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mysql/deletedb-binlog-weiguanjishu-2.png" alt=""></p><p>MySQL 作为当下流行数据库，在数据备份、高可用方面非常有竞争力，今天，我们就重点聊一聊数据备份的杀手锏 binlog。</p><h3 id="一、mysql-主备是什么" tabindex="-1"><a class="header-anchor" href="#一、mysql-主备是什么" aria-hidden="true">#</a> 一、MySQL 主备是什么？</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mysql/deletedb-binlog-weiguanjishu-3.png" alt=""></p><p>情况一：</p><ul><li>客户端的业务操作，读、写访问的是主库</li><li>主库通过某种机制，将数据实时同步给备库</li><li>主库由于有些原因，无法正常响应客户端的请求</li></ul><p>情况二：</p><ul><li>完成主备切换</li><li>客户端读写，访问的是备库（此时备库升级为新主库）</li></ul><p>那么，这里面最核心的数据同步是如何实现的呢？</p><h3 id="二、主从同步" tabindex="-1"><a class="header-anchor" href="#二、主从同步" aria-hidden="true">#</a> 二、主从同步</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mysql/deletedb-binlog-weiguanjishu-4.png" alt=""></p><p>1、在备库执行 <code>change master</code> 命令 ，绑定主库的信息</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>mysql&gt; CHANGE MASTER TO MASTER_HOST = &#39;192.168.1.1&#39;, MASTER_USER = &#39;repl&#39;, MASTER_PASSWORD = &#39;replpassword&#39;, MASTER_PORT = 3306, MASTER_AUTO_POSITION = 1, MASTER_RETRY_COUNT = 0, MASTER_HEARTBEAT_PERIOD = 10000; 
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主备是什么？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/mysql/deletedb-binlog-weiguanjishu.html#二、主从同步" class="router-link-active router-link-exact-active toc-link level3">二、主从同步</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/mysql/deletedb-binlog-weiguanjishu.html#三、开启-binlog" class="router-link-active router-link-exact-active toc-link level3">三、开启 binlog</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/mysql/deletedb-binlog-weiguanjishu.html#四、恢复数据" class="router-link-active router-link-exact-active toc-link level3">四、恢复数据</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><p>大家好，我是二哥呀~我们都知道，数据非常重要。</p><p>网上也经常看到一些段子，某公司程序员对工作不满，删库跑路，老板损失惨重，欲哭无泪。这不前几天又爆出一例，<strong>某程序员离职当天删库跑路</strong>！</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mysql/deletedb-binlog-weiguanjishu-1.png" alt=""></p><p>那么有没有什么解决方案？即使数据库真的被删了，也有备份数据，能快速恢复。甚至可以做到实时热备，即使内部炸掉外部用户也感知不到，一片风平浪静。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mysql/deletedb-binlog-weiguanjishu-2.png" alt=""></p><p>MySQL 作为当下流行数据库，在数据备份、高可用方面非常有竞争力，今天，我们就重点聊一聊数据备份的杀手锏 binlog。</p><h3 id="一、mysql-主备是什么" tabindex="-1"><a class="header-anchor" href="#一、mysql-主备是什么" aria-hidden="true">#</a> 一、MySQL 主备是什么？</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mysql/deletedb-binlog-weiguanjishu-3.png" alt=""></p><p>情况一：</p><ul><li>客户端的业务操作，读、写访问的是主库</li><li>主库通过某种机制，将数据实时同步给备库</li><li>主库由于有些原因，无法正常响应客户端的请求</li></ul><p>情况二：</p><ul><li>完成主备切换</li><li>客户端读写，访问的是备库（此时备库升级为新主库）</li></ul><p>那么，这里面最核心的数据同步是如何实现的呢？</p><h3 id="二、主从同步" tabindex="-1"><a class="header-anchor" href="#二、主从同步" aria-hidden="true">#</a> 二、主从同步</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mysql/deletedb-binlog-weiguanjishu-4.png" alt=""></p><p>1、在备库执行 <code>change master</code> 命令 ，绑定主库的信息</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>mysql&gt; CHANGE MASTER TO MASTER_HOST = &#39;192.168.1.1&#39;, MASTER_USER = &#39;repl&#39;, MASTER_PASSWORD = &#39;replpassword&#39;, MASTER_PORT = 3306, MASTER_AUTO_POSITION = 1, MASTER_RETRY_COUNT = 0, MASTER_HEARTBEAT_PERIOD = 10000; 
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>简单解释下：</p><ul><li>MASTER_HOST ：master主机名（或IP地址）</li><li>MASTER_PORT ：mysql实例端口号</li><li>MASTER_USER：用户名</li><li>MASTER_PASSWORD：密码</li><li>MASTER_AUTO_POSITION：如果进行change master to时使用MASTER_AUTO_POSITION = 1，slave连接master将使用基于GTID的复制协议</li><li>MASTER_RETRY_COUNT：重连次数</li><li>MASTER_HEARTBEAT_PERIOD：复制心跳的周期</li></ul><p>2、备库执行 start slave 命令，备库启动两个线程：I/O thread 和 SQL thread</p><p>3、master主库，有数据更新，将此次更新的事件类型写入到主库的 binlog 文件中</p><p>4、主库会创建log dump 线程，通知slave有数据更新</p><p>5、slave，向master节点的 log dump线程请求一份指定binlog文件位置的副本，并将请求回来的binlog存到本地的Relay log 中继日志中</p><p>6、slave 再开启一个SQL 线程读取Relay log日志，解析出日志里的命令，并执行，从而保证主备库数据同步</p><h3 id="三、开启-binlog" tabindex="-1"><a class="header-anchor" href="#三、开启-binlog" aria-hidden="true">#</a> 三、开启 binlog</h3><p>从以上步骤可以看得出，binlog 起到了非常关键的作用，那就让我们近距离看下 binlog 日志。</p><p>binlog 格式有三种：</p><ul><li>row</li><li>statement</li><li>mixed</li></ul><p>接下来，我们来做一个实验：</p><p>先创建一个表：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>CREATE TABLE `person` (
   `id` bigint(20) unsigned NOT NULL AUTO_INCREMENT COMMENT &#39;自增主键&#39;,
   `income` bigint(20) NOT NULL COMMENT &#39;收入&#39;,
@@ -63,6 +63,6 @@ insert into person values(80,800,800);
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mysql/deletedb-binlog-weiguanjishu-9.png" alt=""></p><p>从上图中我们可以看出，当 binlog_format=statement 时，binlog 里面记录的就是 SQL 语句的原文。</p><p>其中，use tomge 表示要先切到对应的数据库</p><p>如果想从指定位置查看binlog，可以增加 from 可选参数，如下：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>show binlog events in &#39;mysql-bin.000001&#39;  from 5168;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>statement 与 row 对比：</p><p>statement 格式的binlog记录的是sql语句；row 格式的binlog记录的是event（Table_map，Write_rows，Delete_rows）</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mysql/deletedb-binlog-weiguanjishu-10.png" alt=""></p><p>当 binlog 在 statement 格式下，记录的是sql语句，在主库执行时可能使用的是索引 A；但是同步给备库执行时，可能用了 索引B。</p><p>索引不同，同一条sql语句，运行结果可能也不一样。</p><p>针对这个场景，我们建议采用 row 格式的 binlog。</p><p>即使我们使用了带where 条件（如：income&gt;720）的delete语句，但 binlog 记录的是要删除的主键id（id =80 ），所以不会出现差错。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mysql/deletedb-binlog-weiguanjishu-11.png" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mysql/deletedb-binlog-weiguanjishu-12.png" alt=""></p><p><strong>mixed 格式 的binlog 是个啥</strong>？</p><p>由于 statement 格式的binlog 可能会导致主库、备库间的数据同步不一致，因此我们会采用 row 格式。</p><p>但是，row 格式占用的空间很大，写 binlog 也要占用大量的 IO 资源。</p><p>所以，官方提出一种mixed混合模式，集成了两者的优点。</p><p>内容如下：</p><ul><li>mysql会自动判断statement格式，是否会引发主备不一致的问题</li><li>如果statement格式会引起主备不一致的问题，自动使用row格式。</li><li>如果statement格式不会引起主备不一致的问题，那么就用statement格式，</li></ul><h3 id="四、恢复数据" tabindex="-1"><a class="header-anchor" href="#四、恢复数据" aria-hidden="true">#</a> 四、恢复数据</h3><p>当然，我们还建议把MySQL 的binlog设置成 row 模式，因为它可以用于数据恢复。我们来看下 insert、update、delete 三种DML操作如何来恢复数据的。</p><p>1、delete：</p><p>当我们执行 delete 命令时，如果 binlog_row_image 设置了 &#39;FULL&#39;，那么 Delete_rows 里面，包含了删掉的行的所有字段的值。</p><p>如果误删了，因为 binlog 记录了所有字段的值，反向执行 insert 就可以了。</p><p>当 binlog_row_image 设置为 MINIMAL，只记录关键信息，比如 id=80 2、insert：</p><p>row 格式下，binlog 会 记录 insert 的所有字段值。</p><p>如果误操作，只需要根据这些值找到对应的行，再执行 delete 操作即可</p><p>3、update：</p><p>row 格式下，binlog 会 记录 update 修改前、修改后的整行数据。</p><p>如果误操作，只需要用修改前的数据覆盖即可。</p><p>通过命令来恢复数据：</p><p>如果要执行数据恢复，可以使用下面命令</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>mysqlbinlog mysql-bin.000001  --start-position=1  --stop-position=3000 | mysql -h192.168.0.1 -P3306 -u$user -p$pwd;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>将 mysql-bin.000001 文件位置从 1到3000 的 binlog 在 192.168.0.1机器的数据库上回放，还原。</p><p>OK，搞定，再也不怕删库跑路了。</p><hr><p>转载自：微观技术</p><p>转载链接：https://mp.weixin.qq.com/s/oD3Anvz3XCsrahn6WdeeNw</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mysql/deletedb-binlog-weiguanjishu-13.png" alt=""></p><p><em>没有什么使我停留——除了目的，纵然岸旁有玫瑰、有绿荫、有宁静的港湾，我是不系之舟</em>。</p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/mysql/deletedb-binlog-weiguanjishu.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/12 下午4:24:21</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><!----><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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MySQL<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/mysql/redis-shuju-yizhixing.html#_3-先删除-redis-再写-mysql" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="3. 先删除 Redis，再写 MySQL"><!---->3. 先删除 Redis，再写 MySQL<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/mysql/redis-shuju-yizhixing.html#好的方案" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="好的方案"><!---->好的方案<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/mysql/redis-shuju-yizhixing.html#_4-先删除-redis-再写-mysql-再删除-redis" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="4. 先删除 Redis，再写 MySQL，再删除 Redis"><!---->4. 先删除 Redis，再写 MySQL，再删除 Redis<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/mysql/redis-shuju-yizhixing.html#_5-先写-mysql-再删除-redis" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="5. 先写 MySQL，再删除 Redis"><!---->5. 先写 MySQL，再删除 Redis<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/mysql/redis-shuju-yizhixing.html#_6-先写-mysql-通过-binlog-异步更新-redis" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="6. 先写 MySQL，通过 Binlog，异步更新 Redis"><!---->6. 先写 MySQL，通过 Binlog，异步更新 Redis<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/mysql/redis-shuju-yizhixing.html#几种方案比较" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="几种方案比较"><!---->几种方案比较<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">Redis</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">MongoDB</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->如何保障MySQL和Redis的数据一致性？</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年5月21日</span><meta property="datePublished" content="2022-05-21T00:14:16.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category5" role>Java企业级开发</li><meta property="articleSection" content="Java企业级开发"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag3" role>MySQL</li><li class="tag tag3" role>Redis</li></ul><meta property="keywords" content="MySQL,Redis"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 7 分钟</span><meta property="timeRequired" content="PT7M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/mysql/redis-shuju-yizhixing.html#不好的方案" class="router-link-active router-link-exact-active toc-link level2">不好的方案</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/mysql/redis-shuju-yizhixing.html#_1-先写-mysql-再写-redis" class="router-link-active router-link-exact-active toc-link level3">1. 先写 MySQL，再写 Redis</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/mysql/redis-shuju-yizhixing.html#_2-先写-redis-再写-mysql" class="router-link-active router-link-exact-active toc-link level3">2. 先写 Redis，再写 MySQL</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/mysql/redis-shuju-yizhixing.html#_3-先删除-redis-再写-mysql" class="router-link-active router-link-exact-active toc-link level3">3. 先删除 Redis，再写 MySQL</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/mysql/redis-shuju-yizhixing.html#好的方案" class="router-link-active router-link-exact-active toc-link level2">好的方案</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/mysql/redis-shuju-yizhixing.html#_4-先删除-redis-再写-mysql-再删除-redis" class="router-link-active router-link-exact-active toc-link level3">4. 先删除 Redis，再写 MySQL，再删除 Redis</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/mysql/redis-shuju-yizhixing.html#_5-先写-mysql-再删除-redis" class="router-link-active router-link-exact-active toc-link level3">5. 先写 MySQL，再删除 Redis</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/mysql/redis-shuju-yizhixing.html#_6-先写-mysql-通过-binlog-异步更新-redis" class="router-link-active router-link-exact-active toc-link level3">6. 先写 MySQL，通过 Binlog，异步更新 Redis</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/mysql/redis-shuju-yizhixing.html#几种方案比较" class="router-link-active router-link-exact-active toc-link level2">几种方案比较</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><blockquote><p>整理：沉默王二，戳<a href="https://mp.weixin.qq.com/s/RL4Bt_UkNcnsBGL_9w37Zg" target="_blank" rel="noopener noreferrer">转载链接<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，作者：楼仔，戳<a href="https://mp.weixin.qq.com/s/l7v4s1VekIPNi7KZuUgwGQ" target="_blank" rel="noopener noreferrer">原文链接<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>。</p></blockquote><p>如何保障 MySQL 和 Redis 的数据一致性？这个问题很早之前我就遇到过，但是一直没有仔细去研究，上个月看了极客的课程，有一篇文章专门有过讲解，刚好有粉丝也问我这个问题，所以感觉有必要单独出一篇。</p><p><strong>之前也看了很多相关的文章，但是感觉讲的都不好</strong>，很多文章都会去讲各种策略，比如（旁路缓存）策略、（读穿 / 写穿）策略和（写回）策略等，感觉意义真的不大，然后有的文章也只讲了部分情况，也没有告诉最优解。</p><p>我直接先抛一下结论：<strong>在满足实时性的条件下，不存在两者完全保存一致的方案，只有最终一致性方案。</strong> 根据网上的众多解决方案，总结出 6 种，直接看目录：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mysql/redis-shuju-yizhixing-537a505f-1f3f-4f23-b5e3-209c8c8a9281.png" alt=""></p><h2 id="不好的方案" tabindex="-1"><a class="header-anchor" href="#不好的方案" aria-hidden="true">#</a> 不好的方案</h2><h3 id="_1-先写-mysql-再写-redis" tabindex="-1"><a class="header-anchor" href="#_1-先写-mysql-再写-redis" aria-hidden="true">#</a> 1. 先写 MySQL，再写 Redis</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mysql/redis-shuju-yizhixing-9ac6e9ab-dd82-40a5-b71b-836c745ed8ac.png" alt=""></p><blockquote><p>图解说明：</p><ul><li>这是一副时序图，描述请求的先后调用顺序；</li><li>橘黄色的线是请求 A，黑色的线是请求 B；</li><li>橘黄色的文字，是 MySQL 和 Redis 最终不一致的数据；</li><li>数据是从 10 更新为 11；</li><li>后面所有的图，都是这个含义，不再赘述。</li></ul></blockquote><p>请求 A、B 都是先写 MySQL，然后再写 Redis，在高并发情况下，如果请求 A 在写 Redis 时卡了一会，请求 B 已经依次完成数据的更新，就会出现图中的问题。</p><p>这个图已经画的很清晰了，我就不用再去啰嗦了吧，<strong>不过这里有个前提，就是对于读请求，先去读 Redis，如果没有，再去读 DB，但是读请求不会再回写 Redis。</strong> 大白话说一下，就是读请求不会更新 Redis。</p><h3 id="_2-先写-redis-再写-mysql" tabindex="-1"><a class="header-anchor" href="#_2-先写-redis-再写-mysql" aria-hidden="true">#</a> 2. 先写 Redis，再写 MySQL</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mysql/redis-shuju-yizhixing-c50e7ef0-40aa-4931-982a-a9aa31faa6f1.png" alt=""></p><p>同“先写 MySQL，再写 Redis”，看图可秒懂。</p><h3 id="_3-先删除-redis-再写-mysql" tabindex="-1"><a class="header-anchor" href="#_3-先删除-redis-再写-mysql" aria-hidden="true">#</a> 3. 先删除 Redis，再写 MySQL</h3><p>这幅图和上面有些不一样，前面的请求 A 和 B 都是更新请求，这里的请求 A 是更新请求，<strong>但是请求 B 是读请求，且请求 B 的读请求会回写 Redis。</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mysql/redis-shuju-yizhixing-0fec5605-5530-4b12-af0e-2b529c41e6e6.png" alt=""></p><p>请求 A 先删除缓存，可能因为卡顿，数据一直没有更新到 MySQL，导致两者数据不一致。</p><p><strong>这种情况出现的概率比较大，因为请求 A 更新 MySQL 可能耗时会比较长，而请求 B 的前两步都是查询，会非常快。</strong></p><h2 id="好的方案" tabindex="-1"><a class="header-anchor" href="#好的方案" aria-hidden="true">#</a> 好的方案</h2><h3 id="_4-先删除-redis-再写-mysql-再删除-redis" tabindex="-1"><a class="header-anchor" href="#_4-先删除-redis-再写-mysql-再删除-redis" aria-hidden="true">#</a> 4. 先删除 Redis，再写 MySQL，再删除 Redis</h3><p>对于“先删除 Redis，再写 MySQL”，如果要解决最后的不一致问题，其实再对 Redis 重新删除即可，<strong>这个也是大家常说的“缓存双删”。</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mysql/redis-shuju-yizhixing-1fe439cd-83fe-487f-a7ba-578a84839616.png" alt=""></p><p>为了便于大家看图，对于蓝色的文字，“删除缓存 10”必须在“回写缓存10”后面，那如何才能保证一定是在后面呢？<strong>网上给出的第一个方案是，让请求 A 的最后一次删除，等待 500ms。</strong></p><p>对于这种方案，看看就行，反正我是不会用，太 Low 了，风险也不可控。</p><p><strong>那有没有更好的方案呢，我建议异步串行化删除，即删除请求入队列</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mysql/redis-shuju-yizhixing-6cb3caf1-c85b-4361-8e29-9e71361fd0c8.png" alt=""></p><p>异步删除对线上业务无影响，串行化处理保障并发情况下正确删除。</p><p>如果双删失败怎么办，网上有给 Redis 加一个缓存过期时间的方案，这个不敢苟同。<strong>个人建议整个重试机制，可以借助消息队列的重试机制，也可以自己整个表，记录重试次数</strong>，方法很多。</p><blockquote><p>简单小结一下：</p><ul><li>“缓存双删”不要用无脑的 sleep 500 ms；</li><li>通过消息队列的异步&amp;串行，实现最后一次缓存删除；</li><li>缓存删除失败，增加重试机制。</li></ul></blockquote><h3 id="_5-先写-mysql-再删除-redis" tabindex="-1"><a class="header-anchor" href="#_5-先写-mysql-再删除-redis" aria-hidden="true">#</a> 5. 先写 MySQL，再删除 Redis</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mysql/redis-shuju-yizhixing-1f0e26a8-49c3-469e-a193-08f9766943aa.png" alt=""></p><p>对于上面这种情况，对于第一次查询，请求 B 查询的数据是 10，但是 MySQL 的数据是 11，<strong>只存在这一次不一致的情况，对于不是强一致性要求的业务，可以容忍。</strong>（那什么情况下不能容忍呢，比如秒杀业务、库存服务等。）</p><p>当请求 B 进行第二次查询时，因为没有命中 Redis，会重新查一次 DB，然后再回写到 Reids。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mysql/redis-shuju-yizhixing-268696d3-a7e9-4762-9fe6-283859d5b0ba.png" alt=""></p><p>这里需要满足 2 个条件：</p><ul><li>缓存刚好自动失效；</li><li>请求 B 从数据库查出 10，回写缓存的耗时，比请求 A 写数据库，并且删除缓存的还长。</li></ul><p>对于第二个条件，我们都知道更新 DB 肯定比查询耗时要长，所以出现这个情况的概率很小，同时满足上述条件的情况更小。</p><h3 id="_6-先写-mysql-通过-binlog-异步更新-redis" tabindex="-1"><a class="header-anchor" href="#_6-先写-mysql-通过-binlog-异步更新-redis" aria-hidden="true">#</a> 6. 先写 MySQL，通过 Binlog，异步更新 Redis</h3><p>这种方案，主要是监听 MySQL 的 Binlog，然后通过异步的方式，将数据更新到 Redis，这种方案有个前提，查询的请求，不会回写 Redis。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mysql/redis-shuju-yizhixing-0da55874-8cf7-4c5a-995b-a0e6611bfac2.png" alt=""></p><p>这个方案，会保证 MySQL 和 Redis 的最终一致性，但是如果中途请求 B 需要查询数据，如果缓存无数据，就直接查 DB；如果缓存有数据，查询的数据也会存在不一致的情况。</p><p><strong>所以这个方案，是实现最终一致性的终极解决方案，但是不能保证实时性。</strong></p><h2 id="几种方案比较" tabindex="-1"><a class="header-anchor" href="#几种方案比较" aria-hidden="true">#</a> 几种方案比较</h2><p>我们对比上面讨论的 6 种方案：</p><ol><li>先写 Redis，再写 MySQL</li></ol><ul><li><strong>这种方案，我肯定不会用</strong>，万一 DB 挂了，你把数据写到缓存，DB 无数据，这个是灾难性的；</li><li>我之前也见同学这么用过，如果写 DB 失败，对 Redis 进行逆操作，那如果逆操作失败呢，是不是还要搞个重试？</li></ul><ol start="2"><li>先写 MySQL，再写 Redis</li></ol><ul><li><strong>对于并发量、一致性要求不高的项目，很多就是这么用的</strong>，我之前也经常这么搞，但是不建议这么做；</li><li>当 Redis 瞬间不可用的情况，需要报警出来，然后线下处理。</li></ul><ol start="3"><li>先删除 Redis，再写 MySQL</li></ol><ul><li>这种方式，我还真没用过，<strong>直接忽略吧。</strong></li></ul><ol start="4"><li>先删除 Redis，再写 MySQL，再删除 Redis</li></ol><ul><li>这种方式虽然可行，但是<strong>感觉好复杂</strong>，还要搞个消息队列去异步删除 Redis。</li></ul><ol start="5"><li>先写 MySQL，再删除 Redis</li></ol><ul><li><strong>比较推荐这种方式</strong>，删除 Redis 如果失败，可以再多重试几次，否则报警出来；</li><li>这个方案，是实时性中最好的方案，在一些高并发场景中，推荐这种。</li></ul><ol start="6"><li>先写 MySQL，通过 Binlog，异步更新 Redis</li></ol><ul><li><strong>对于异地容灾、数据汇总等，建议会用这种方式</strong>，比如 binlog + kafka，数据的一致性也可以达到秒级；</li><li>纯粹的高并发场景，不建议用这种方案，比如抢购、秒杀等。</li></ul><p><strong>个人结论：</strong></p><ul><li><strong>实时一致性方案</strong>：采用“先写 MySQL，再删除 Redis”的策略，这种情况虽然也会存在两者不一致，但是需要满足的条件有点苛刻，<strong>所以是满足实时性条件下，能尽量满足一致性的最优解。</strong></li><li><strong>最终一致性方案</strong>：采用“先写 MySQL，通过 Binlog，异步更新 Redis”，可以通过 Binlog，结合消息队列异步更新 Redis，<strong>是最终一致性的最优解。</strong></li></ul><hr><blockquote><p>整理：沉默王二，戳<a href="https://mp.weixin.qq.com/s/RL4Bt_UkNcnsBGL_9w37Zg" target="_blank" rel="noopener noreferrer">转载链接<span><svg 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clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">四、数据库</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">MySQL</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a aria-current="page" href="/mysql/redis-shuju-yizhixing.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="MySQL和Redis数据一致性"><!---->MySQL和Redis数据一致性<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/mysql/redis-shuju-yizhixing.html#不好的方案" class="router-link-active router-link-exact-active nav-link sidebar-link heading" 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class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/mysql/redis-shuju-yizhixing.html#好的方案" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="好的方案"><!---->好的方案<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/mysql/redis-shuju-yizhixing.html#_4-先删除-redis-再写-mysql-再删除-redis" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="4. 先删除 Redis，再写 MySQL，再删除 Redis"><!---->4. 先删除 Redis，再写 MySQL，再删除 Redis<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/mysql/redis-shuju-yizhixing.html#_5-先写-mysql-再删除-redis" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="5. 先写 MySQL，再删除 Redis"><!---->5. 先写 MySQL，再删除 Redis<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/mysql/redis-shuju-yizhixing.html#_6-先写-mysql-通过-binlog-异步更新-redis" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="6. 先写 MySQL，通过 Binlog，异步更新 Redis"><!---->6. 先写 MySQL，通过 Binlog，异步更新 Redis<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/mysql/redis-shuju-yizhixing.html#几种方案比较" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="几种方案比较"><!---->几种方案比较<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">Redis</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">MongoDB</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->如何保障MySQL和Redis的数据一致性？</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年5月21日</span><meta property="datePublished" content="2022-05-21T00:14:16.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category5" role>Java企业级开发</li><meta property="articleSection" content="Java企业级开发"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag3" role>MySQL</li><li class="tag tag3" role>Redis</li></ul><meta property="keywords" content="MySQL,Redis"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 7 分钟</span><meta property="timeRequired" content="PT7M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/mysql/redis-shuju-yizhixing.html#不好的方案" class="router-link-active router-link-exact-active toc-link level2">不好的方案</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/mysql/redis-shuju-yizhixing.html#_1-先写-mysql-再写-redis" class="router-link-active router-link-exact-active toc-link level3">1. 先写 MySQL，再写 Redis</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/mysql/redis-shuju-yizhixing.html#_2-先写-redis-再写-mysql" class="router-link-active router-link-exact-active toc-link level3">2. 先写 Redis，再写 MySQL</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/mysql/redis-shuju-yizhixing.html#_3-先删除-redis-再写-mysql" class="router-link-active router-link-exact-active toc-link level3">3. 先删除 Redis，再写 MySQL</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/mysql/redis-shuju-yizhixing.html#好的方案" class="router-link-active router-link-exact-active toc-link level2">好的方案</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/mysql/redis-shuju-yizhixing.html#_4-先删除-redis-再写-mysql-再删除-redis" class="router-link-active router-link-exact-active toc-link level3">4. 先删除 Redis，再写 MySQL，再删除 Redis</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/mysql/redis-shuju-yizhixing.html#_5-先写-mysql-再删除-redis" class="router-link-active router-link-exact-active toc-link level3">5. 先写 MySQL，再删除 Redis</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/mysql/redis-shuju-yizhixing.html#_6-先写-mysql-通过-binlog-异步更新-redis" class="router-link-active router-link-exact-active toc-link level3">6. 先写 MySQL，通过 Binlog，异步更新 Redis</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/mysql/redis-shuju-yizhixing.html#几种方案比较" class="router-link-active router-link-exact-active toc-link level2">几种方案比较</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><blockquote><p>整理：沉默王二，戳<a href="https://mp.weixin.qq.com/s/RL4Bt_UkNcnsBGL_9w37Zg" target="_blank" rel="noopener noreferrer">转载链接<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，作者：楼仔，戳<a href="https://mp.weixin.qq.com/s/l7v4s1VekIPNi7KZuUgwGQ" target="_blank" rel="noopener noreferrer">原文链接<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>。</p></blockquote><p>如何保障 MySQL 和 Redis 的数据一致性？这个问题很早之前我就遇到过，但是一直没有仔细去研究，上个月看了极客的课程，有一篇文章专门有过讲解，刚好有粉丝也问我这个问题，所以感觉有必要单独出一篇。</p><p><strong>之前也看了很多相关的文章，但是感觉讲的都不好</strong>，很多文章都会去讲各种策略，比如（旁路缓存）策略、（读穿 / 写穿）策略和（写回）策略等，感觉意义真的不大，然后有的文章也只讲了部分情况，也没有告诉最优解。</p><p>我直接先抛一下结论：<strong>在满足实时性的条件下，不存在两者完全保存一致的方案，只有最终一致性方案。</strong> 根据网上的众多解决方案，总结出 6 种，直接看目录：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mysql/redis-shuju-yizhixing-537a505f-1f3f-4f23-b5e3-209c8c8a9281.png" alt=""></p><h2 id="不好的方案" tabindex="-1"><a class="header-anchor" href="#不好的方案" aria-hidden="true">#</a> 不好的方案</h2><h3 id="_1-先写-mysql-再写-redis" tabindex="-1"><a class="header-anchor" href="#_1-先写-mysql-再写-redis" aria-hidden="true">#</a> 1. 先写 MySQL，再写 Redis</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mysql/redis-shuju-yizhixing-9ac6e9ab-dd82-40a5-b71b-836c745ed8ac.png" alt=""></p><blockquote><p>图解说明：</p><ul><li>这是一副时序图，描述请求的先后调用顺序；</li><li>橘黄色的线是请求 A，黑色的线是请求 B；</li><li>橘黄色的文字，是 MySQL 和 Redis 最终不一致的数据；</li><li>数据是从 10 更新为 11；</li><li>后面所有的图，都是这个含义，不再赘述。</li></ul></blockquote><p>请求 A、B 都是先写 MySQL，然后再写 Redis，在高并发情况下，如果请求 A 在写 Redis 时卡了一会，请求 B 已经依次完成数据的更新，就会出现图中的问题。</p><p>这个图已经画的很清晰了，我就不用再去啰嗦了吧，<strong>不过这里有个前提，就是对于读请求，先去读 Redis，如果没有，再去读 DB，但是读请求不会再回写 Redis。</strong> 大白话说一下，就是读请求不会更新 Redis。</p><h3 id="_2-先写-redis-再写-mysql" tabindex="-1"><a class="header-anchor" href="#_2-先写-redis-再写-mysql" aria-hidden="true">#</a> 2. 先写 Redis，再写 MySQL</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mysql/redis-shuju-yizhixing-c50e7ef0-40aa-4931-982a-a9aa31faa6f1.png" alt=""></p><p>同“先写 MySQL，再写 Redis”，看图可秒懂。</p><h3 id="_3-先删除-redis-再写-mysql" tabindex="-1"><a class="header-anchor" href="#_3-先删除-redis-再写-mysql" aria-hidden="true">#</a> 3. 先删除 Redis，再写 MySQL</h3><p>这幅图和上面有些不一样，前面的请求 A 和 B 都是更新请求，这里的请求 A 是更新请求，<strong>但是请求 B 是读请求，且请求 B 的读请求会回写 Redis。</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mysql/redis-shuju-yizhixing-0fec5605-5530-4b12-af0e-2b529c41e6e6.png" alt=""></p><p>请求 A 先删除缓存，可能因为卡顿，数据一直没有更新到 MySQL，导致两者数据不一致。</p><p><strong>这种情况出现的概率比较大，因为请求 A 更新 MySQL 可能耗时会比较长，而请求 B 的前两步都是查询，会非常快。</strong></p><h2 id="好的方案" tabindex="-1"><a class="header-anchor" href="#好的方案" aria-hidden="true">#</a> 好的方案</h2><h3 id="_4-先删除-redis-再写-mysql-再删除-redis" tabindex="-1"><a class="header-anchor" href="#_4-先删除-redis-再写-mysql-再删除-redis" aria-hidden="true">#</a> 4. 先删除 Redis，再写 MySQL，再删除 Redis</h3><p>对于“先删除 Redis，再写 MySQL”，如果要解决最后的不一致问题，其实再对 Redis 重新删除即可，<strong>这个也是大家常说的“缓存双删”。</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mysql/redis-shuju-yizhixing-1fe439cd-83fe-487f-a7ba-578a84839616.png" alt=""></p><p>为了便于大家看图，对于蓝色的文字，“删除缓存 10”必须在“回写缓存10”后面，那如何才能保证一定是在后面呢？<strong>网上给出的第一个方案是，让请求 A 的最后一次删除，等待 500ms。</strong></p><p>对于这种方案，看看就行，反正我是不会用，太 Low 了，风险也不可控。</p><p><strong>那有没有更好的方案呢，我建议异步串行化删除，即删除请求入队列</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mysql/redis-shuju-yizhixing-6cb3caf1-c85b-4361-8e29-9e71361fd0c8.png" alt=""></p><p>异步删除对线上业务无影响，串行化处理保障并发情况下正确删除。</p><p>如果双删失败怎么办，网上有给 Redis 加一个缓存过期时间的方案，这个不敢苟同。<strong>个人建议整个重试机制，可以借助消息队列的重试机制，也可以自己整个表，记录重试次数</strong>，方法很多。</p><blockquote><p>简单小结一下：</p><ul><li>“缓存双删”不要用无脑的 sleep 500 ms；</li><li>通过消息队列的异步&amp;串行，实现最后一次缓存删除；</li><li>缓存删除失败，增加重试机制。</li></ul></blockquote><h3 id="_5-先写-mysql-再删除-redis" tabindex="-1"><a class="header-anchor" href="#_5-先写-mysql-再删除-redis" aria-hidden="true">#</a> 5. 先写 MySQL，再删除 Redis</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mysql/redis-shuju-yizhixing-1f0e26a8-49c3-469e-a193-08f9766943aa.png" alt=""></p><p>对于上面这种情况，对于第一次查询，请求 B 查询的数据是 10，但是 MySQL 的数据是 11，<strong>只存在这一次不一致的情况，对于不是强一致性要求的业务，可以容忍。</strong>（那什么情况下不能容忍呢，比如秒杀业务、库存服务等。）</p><p>当请求 B 进行第二次查询时，因为没有命中 Redis，会重新查一次 DB，然后再回写到 Reids。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mysql/redis-shuju-yizhixing-268696d3-a7e9-4762-9fe6-283859d5b0ba.png" alt=""></p><p>这里需要满足 2 个条件：</p><ul><li>缓存刚好自动失效；</li><li>请求 B 从数据库查出 10，回写缓存的耗时，比请求 A 写数据库，并且删除缓存的还长。</li></ul><p>对于第二个条件，我们都知道更新 DB 肯定比查询耗时要长，所以出现这个情况的概率很小，同时满足上述条件的情况更小。</p><h3 id="_6-先写-mysql-通过-binlog-异步更新-redis" tabindex="-1"><a class="header-anchor" href="#_6-先写-mysql-通过-binlog-异步更新-redis" aria-hidden="true">#</a> 6. 先写 MySQL，通过 Binlog，异步更新 Redis</h3><p>这种方案，主要是监听 MySQL 的 Binlog，然后通过异步的方式，将数据更新到 Redis，这种方案有个前提，查询的请求，不会回写 Redis。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/mysql/redis-shuju-yizhixing-0da55874-8cf7-4c5a-995b-a0e6611bfac2.png" alt=""></p><p>这个方案，会保证 MySQL 和 Redis 的最终一致性，但是如果中途请求 B 需要查询数据，如果缓存无数据，就直接查 DB；如果缓存有数据，查询的数据也会存在不一致的情况。</p><p><strong>所以这个方案，是实现最终一致性的终极解决方案，但是不能保证实时性。</strong></p><h2 id="几种方案比较" tabindex="-1"><a class="header-anchor" href="#几种方案比较" aria-hidden="true">#</a> 几种方案比较</h2><p>我们对比上面讨论的 6 种方案：</p><ol><li>先写 Redis，再写 MySQL</li></ol><ul><li><strong>这种方案，我肯定不会用</strong>，万一 DB 挂了，你把数据写到缓存，DB 无数据，这个是灾难性的；</li><li>我之前也见同学这么用过，如果写 DB 失败，对 Redis 进行逆操作，那如果逆操作失败呢，是不是还要搞个重试？</li></ul><ol start="2"><li>先写 MySQL，再写 Redis</li></ol><ul><li><strong>对于并发量、一致性要求不高的项目，很多就是这么用的</strong>，我之前也经常这么搞，但是不建议这么做；</li><li>当 Redis 瞬间不可用的情况，需要报警出来，然后线下处理。</li></ul><ol start="3"><li>先删除 Redis，再写 MySQL</li></ol><ul><li>这种方式，我还真没用过，<strong>直接忽略吧。</strong></li></ul><ol start="4"><li>先删除 Redis，再写 MySQL，再删除 Redis</li></ol><ul><li>这种方式虽然可行，但是<strong>感觉好复杂</strong>，还要搞个消息队列去异步删除 Redis。</li></ul><ol start="5"><li>先写 MySQL，再删除 Redis</li></ol><ul><li><strong>比较推荐这种方式</strong>，删除 Redis 如果失败，可以再多重试几次，否则报警出来；</li><li>这个方案，是实时性中最好的方案，在一些高并发场景中，推荐这种。</li></ul><ol start="6"><li>先写 MySQL，通过 Binlog，异步更新 Redis</li></ol><ul><li><strong>对于异地容灾、数据汇总等，建议会用这种方式</strong>，比如 binlog + kafka，数据的一致性也可以达到秒级；</li><li>纯粹的高并发场景，不建议用这种方案，比如抢购、秒杀等。</li></ul><p><strong>个人结论：</strong></p><ul><li><strong>实时一致性方案</strong>：采用“先写 MySQL，再删除 Redis”的策略，这种情况虽然也会存在两者不一致，但是需要满足的条件有点苛刻，<strong>所以是满足实时性条件下，能尽量满足一致性的最优解。</strong></li><li><strong>最终一致性方案</strong>：采用“先写 MySQL，通过 Binlog，异步更新 Redis”，可以通过 Binlog，结合消息队列异步更新 Redis，<strong>是最终一致性的最优解。</strong></li></ul><hr><blockquote><p>整理：沉默王二，戳<a href="https://mp.weixin.qq.com/s/RL4Bt_UkNcnsBGL_9w37Zg" target="_blank" rel="noopener noreferrer">转载链接<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，作者：楼仔，戳<a href="https://mp.weixin.qq.com/s/l7v4s1VekIPNi7KZuUgwGQ" target="_blank" rel="noopener noreferrer">原文链接<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>。</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/mysql/redis-shuju-yizhixing.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 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router-link-exact-active nav-link sidebar-link heading" aria-label="如何在Nginx中获得当前的时间?"><!---->如何在Nginx中获得当前的时间?<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/nginx/40-interview.html#用nginx服务器解释-s的目的是什么" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="用Nginx服务器解释-s的目的是什么?"><!---->用Nginx服务器解释-s的目的是什么?<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/nginx/40-interview.html#如何在nginx服务器上添加模块" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="如何在Nginx服务器上添加模块?"><!---->如何在Nginx服务器上添加模块?<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/nginx/40-interview.html#生产中如何设置worker进程的数量呢" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="生产中如何设置worker进程的数量呢？"><!---->生产中如何设置worker进程的数量呢？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/nginx/40-interview.html#nginx状态码" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="nginx状态码"><!---->nginx状态码<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">背诵版八股文</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">城市选择</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Nginx：40道精选面试题必看👍</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年4月28日</span><meta property="datePublished" content="2022-04-27T23:46:51.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category4" role>求职面试</li><meta property="articleSection" content="求职面试"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag7" role>面试题集合</li></ul><meta property="keywords" content="面试题集合"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 27 分钟</span><meta property="timeRequired" content="PT27M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div 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class="theme-hope-content"><h1 id="nginx-40道精选面试题必看" tabindex="-1"><a class="header-anchor" href="#nginx-40道精选面试题必看" aria-hidden="true">#</a> Nginx：40道精选面试题必看👍</h1><p>大家好，我是二哥呀！那天，我徒弟小二偷偷摸摸跑去了一家公司面试，结果回来给我说在 Nginx 上跪了，问我该怎么办？</p><p>我先是毫不留情地批评了他，怎么能背着领导去面试呢？不过，看着小二难过的表情，我还是于心不忍，于是给他整理了 40 道 Nginx 的面试题，希望能帮他一把。</p><ul><li>什么是Nginx？</li><li>Nginx 有哪些优点？</li><li>Nginx应用场景？</li><li>Nginx怎么处理请求的？</li><li>Nginx 是如何实现高并发的？</li><li>什么是正向代理？</li><li>什么是反向代理？</li><li>反向代理服务器的优点是什么?</li><li>Nginx目录结构有哪些？</li><li>Nginx配置文件nginx.conf有哪些属性模块?</li><li>cookie和session区别？</li><li>为什么 Nginx 不使用多线程？</li><li>nginx和apache的区别</li><li>什么是动态资源、静态资源分离？</li><li>为什么要做动、静分离？</li><li>什么叫 CDN 服务？</li><li>Nginx怎么做的动静分离？</li><li>Nginx负载均衡的算法怎么实现的?策略有哪些?</li><li>如何用Nginx解决前端跨域问题？</li><li>Nginx虚拟主机怎么配置?</li><li>location的作用是什么？</li><li>限流怎么做的？</li><li>漏桶流算法和令牌桶算法知道？</li><li>Nginx配置高可用性怎么配置？</li><li>Nginx怎么判断别IP不可访问？</li><li>在nginx中，如何使用未定义的服务器名称来阻止处理请求？</li><li>怎么限制浏览器访问？</li><li>Rewrite全局变量是什么？</li><li>Nginx 如何实现后端服务的健康检查？</li><li>Nginx 如何开启压缩？</li><li>ngx_http_upstream_module的作用是什么?</li><li>什么是C10K问题?</li><li>Nginx是否支持将请求压缩到上游?</li><li>如何在Nginx中获得当前的时间?</li><li>用Nginx服务器解释-s的目的是什么?</li><li>如何在Nginx服务器上添加模块?</li><li>生产中如何设置worker进程的数量呢？</li><li>nginx状态码</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nginx/40-interview-63553177-7359-4f68-8673-5b44285cb701.png" alt=""></p><hr><h2 id="什么是nginx" tabindex="-1"><a class="header-anchor" href="#什么是nginx" aria-hidden="true">#</a> 什么是Nginx？</h2><p>Nginx是一个 轻量级/高性能的反向代理Web服务器，用于 HTTP、HTTPS、SMTP、POP3 和 IMAP 协议。他实现非常高效的反向代理、负载平衡，他可以处理2-3万并发连接数，官方监测能支持5万并发，现在中国使用nginx网站用户有很多，例如：新浪、网易、 腾讯等。</p><h2 id="nginx-有哪些优点" tabindex="-1"><a class="header-anchor" href="#nginx-有哪些优点" aria-hidden="true">#</a> Nginx 有哪些优点？</h2><ul><li>跨平台、配置简单。</li><li>非阻塞、高并发连接：处理 2-3 万并发连接数，官方监测能支持 5 万并发。</li><li>内存消耗小：开启 10 个 Nginx 才占 150M 内存。</li><li>成本低廉，且开源。</li><li>稳定性高，宕机的概率非常小。</li><li>内置的健康检查功能：如果有一个服务器宕机，会做一个健康检查，再发送的请求就不会发送到宕机的服务器了。重新将请求提交到其他的节点上</li></ul><h2 id="nginx应用场景" tabindex="-1"><a class="header-anchor" href="#nginx应用场景" aria-hidden="true">#</a> Nginx应用场景？</h2><ul><li>http服务器。Nginx是一个http服务可以独立提供http服务。可以做网页静态服务器。</li><li>虚拟主机。可以实现在一台服务器虚拟出多个网站，例如个人网站使用的虚拟机。</li><li>反向代理，负载均衡。当网站的访问量达到一定程度后，单台服务器不能满足用户的请求时，需要用多台服务器集群可以使用nginx做反向代理。并且多台服务器可以平均分担负载，不会应为某台服务器负载高宕机而某台服务器闲置的情况。</li><li>nginz 中也可以配置安全管理、比如可以使用Nginx搭建API接口网关,对每个接口服务进行拦截。</li></ul><h2 id="nginx怎么处理请求的" tabindex="-1"><a class="header-anchor" href="#nginx怎么处理请求的" aria-hidden="true">#</a> Nginx怎么处理请求的？</h2><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>server {         # 第一个Server区块开始，表示一个独立的虚拟主机站点
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aria-current="page" href="/nginx/40-interview.html#什么是c10k问题" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="什么是C10K问题?"><!---->什么是C10K问题?<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/nginx/40-interview.html#nginx是否支持将请求压缩到上游" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="Nginx是否支持将请求压缩到上游?"><!---->Nginx是否支持将请求压缩到上游?<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/nginx/40-interview.html#如何在nginx中获得当前的时间" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="如何在Nginx中获得当前的时间?"><!---->如何在Nginx中获得当前的时间?<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/nginx/40-interview.html#用nginx服务器解释-s的目的是什么" class="router-link-active router-link-exact-active nav-link 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class="sidebar-sub-headers"></ul></li></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">背诵版八股文</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">城市选择</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Nginx：40道精选面试题必看👍</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年4月28日</span><meta property="datePublished" content="2022-04-27T23:46:51.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category4" role>求职面试</li><meta property="articleSection" content="求职面试"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag7" role>面试题集合</li></ul><meta property="keywords" content="面试题集合"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 27 分钟</span><meta property="timeRequired" content="PT27M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/nginx/40-interview.html#什么是nginx" class="router-link-active router-link-exact-active toc-link level2">什么是Nginx？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nginx/40-interview.html#nginx-有哪些优点" class="router-link-active router-link-exact-active toc-link level2">Nginx 有哪些优点？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nginx/40-interview.html#nginx应用场景" class="router-link-active router-link-exact-active toc-link level2">Nginx应用场景？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nginx/40-interview.html#nginx怎么处理请求的" class="router-link-active router-link-exact-active toc-link level2">Nginx怎么处理请求的？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nginx/40-interview.html#nginx-是如何实现高并发的" class="router-link-active router-link-exact-active toc-link level2">Nginx 是如何实现高并发的？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nginx/40-interview.html#什么是正向代理" class="router-link-active router-link-exact-active toc-link level2">什么是正向代理？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nginx/40-interview.html#什么是反向代理" class="router-link-active router-link-exact-active toc-link level2">什么是反向代理？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nginx/40-interview.html#反向代理服务器的优点是什么" class="router-link-active router-link-exact-active toc-link level2">反向代理服务器的优点是什么?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nginx/40-interview.html#nginx目录结构有哪些" class="router-link-active router-link-exact-active toc-link level2">Nginx目录结构有哪些？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nginx/40-interview.html#nginx配置文件nginx-conf有哪些属性模块" class="router-link-active router-link-exact-active toc-link level2">Nginx配置文件nginx.conf有哪些属性模块?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nginx/40-interview.html#cookie和session区别" class="router-link-active router-link-exact-active toc-link level2">cookie和session区别？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nginx/40-interview.html#为什么-nginx-不使用多线程" class="router-link-active router-link-exact-active toc-link level2">为什么 Nginx 不使用多线程？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nginx/40-interview.html#nginx和apache的区别" class="router-link-active router-link-exact-active toc-link level2">nginx和apache的区别</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nginx/40-interview.html#什么是动态资源、静态资源分离" class="router-link-active router-link-exact-active toc-link level2">什么是动态资源、静态资源分离？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nginx/40-interview.html#为什么要做动、静分离" class="router-link-active router-link-exact-active toc-link level2">为什么要做动、静分离？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nginx/40-interview.html#什么叫-cdn-服务" class="router-link-active router-link-exact-active toc-link level2">什么叫 CDN 服务？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nginx/40-interview.html#nginx怎么做的动静分离" class="router-link-active router-link-exact-active toc-link level2">Nginx怎么做的动静分离？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nginx/40-interview.html#nginx负载均衡的算法怎么实现的-策略有哪些" class="router-link-active router-link-exact-active toc-link level2">Nginx负载均衡的算法怎么实现的?策略有哪些?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nginx/40-interview.html#如何用nginx解决前端跨域问题" class="router-link-active router-link-exact-active toc-link level2">如何用Nginx解决前端跨域问题？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nginx/40-interview.html#nginx虚拟主机怎么配置" class="router-link-active router-link-exact-active toc-link level2">Nginx虚拟主机怎么配置?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nginx/40-interview.html#location的作用是什么" class="router-link-active router-link-exact-active toc-link level2">location的作用是什么？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nginx/40-interview.html#限流怎么做的" class="router-link-active router-link-exact-active toc-link level2">限流怎么做的？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nginx/40-interview.html#漏桶流算法和令牌桶算法知道" class="router-link-active router-link-exact-active toc-link level2">漏桶流算法和令牌桶算法知道？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nginx/40-interview.html#nginx配置高可用性怎么配置" class="router-link-active router-link-exact-active toc-link level2">Nginx配置高可用性怎么配置？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nginx/40-interview.html#nginx怎么判断别ip不可访问" class="router-link-active router-link-exact-active toc-link level2">Nginx怎么判断别IP不可访问？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nginx/40-interview.html#在nginx中-如何使用未定义的服务器名称来阻止处理请求" class="router-link-active router-link-exact-active toc-link level2">在nginx中，如何使用未定义的服务器名称来阻止处理请求？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nginx/40-interview.html#怎么限制浏览器访问" class="router-link-active router-link-exact-active toc-link level2">怎么限制浏览器访问？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nginx/40-interview.html#rewrite全局变量是什么" class="router-link-active router-link-exact-active toc-link level2">Rewrite全局变量是什么？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nginx/40-interview.html#nginx-如何实现后端服务的健康检查" class="router-link-active router-link-exact-active toc-link level2">Nginx 如何实现后端服务的健康检查？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nginx/40-interview.html#nginx-如何开启压缩" class="router-link-active router-link-exact-active toc-link level2">Nginx 如何开启压缩？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nginx/40-interview.html#ngx-http-upstream-module的作用是什么" class="router-link-active router-link-exact-active toc-link level2">ngx_http_upstream_module的作用是什么?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nginx/40-interview.html#什么是c10k问题" class="router-link-active router-link-exact-active toc-link level2">什么是C10K问题?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nginx/40-interview.html#nginx是否支持将请求压缩到上游" class="router-link-active router-link-exact-active toc-link level2">Nginx是否支持将请求压缩到上游?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nginx/40-interview.html#如何在nginx中获得当前的时间" class="router-link-active router-link-exact-active toc-link level2">如何在Nginx中获得当前的时间?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nginx/40-interview.html#用nginx服务器解释-s的目的是什么" class="router-link-active router-link-exact-active toc-link level2">用Nginx服务器解释-s的目的是什么?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nginx/40-interview.html#如何在nginx服务器上添加模块" class="router-link-active router-link-exact-active toc-link level2">如何在Nginx服务器上添加模块?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nginx/40-interview.html#生产中如何设置worker进程的数量呢" class="router-link-active router-link-exact-active toc-link level2">生产中如何设置worker进程的数量呢？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nginx/40-interview.html#nginx状态码" class="router-link-active router-link-exact-active toc-link level2">nginx状态码</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="nginx-40道精选面试题必看" tabindex="-1"><a class="header-anchor" href="#nginx-40道精选面试题必看" aria-hidden="true">#</a> Nginx：40道精选面试题必看👍</h1><p>大家好，我是二哥呀！那天，我徒弟小二偷偷摸摸跑去了一家公司面试，结果回来给我说在 Nginx 上跪了，问我该怎么办？</p><p>我先是毫不留情地批评了他，怎么能背着领导去面试呢？不过，看着小二难过的表情，我还是于心不忍，于是给他整理了 40 道 Nginx 的面试题，希望能帮他一把。</p><ul><li>什么是Nginx？</li><li>Nginx 有哪些优点？</li><li>Nginx应用场景？</li><li>Nginx怎么处理请求的？</li><li>Nginx 是如何实现高并发的？</li><li>什么是正向代理？</li><li>什么是反向代理？</li><li>反向代理服务器的优点是什么?</li><li>Nginx目录结构有哪些？</li><li>Nginx配置文件nginx.conf有哪些属性模块?</li><li>cookie和session区别？</li><li>为什么 Nginx 不使用多线程？</li><li>nginx和apache的区别</li><li>什么是动态资源、静态资源分离？</li><li>为什么要做动、静分离？</li><li>什么叫 CDN 服务？</li><li>Nginx怎么做的动静分离？</li><li>Nginx负载均衡的算法怎么实现的?策略有哪些?</li><li>如何用Nginx解决前端跨域问题？</li><li>Nginx虚拟主机怎么配置?</li><li>location的作用是什么？</li><li>限流怎么做的？</li><li>漏桶流算法和令牌桶算法知道？</li><li>Nginx配置高可用性怎么配置？</li><li>Nginx怎么判断别IP不可访问？</li><li>在nginx中，如何使用未定义的服务器名称来阻止处理请求？</li><li>怎么限制浏览器访问？</li><li>Rewrite全局变量是什么？</li><li>Nginx 如何实现后端服务的健康检查？</li><li>Nginx 如何开启压缩？</li><li>ngx_http_upstream_module的作用是什么?</li><li>什么是C10K问题?</li><li>Nginx是否支持将请求压缩到上游?</li><li>如何在Nginx中获得当前的时间?</li><li>用Nginx服务器解释-s的目的是什么?</li><li>如何在Nginx服务器上添加模块?</li><li>生产中如何设置worker进程的数量呢？</li><li>nginx状态码</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nginx/40-interview-63553177-7359-4f68-8673-5b44285cb701.png" alt=""></p><hr><h2 id="什么是nginx" tabindex="-1"><a class="header-anchor" href="#什么是nginx" aria-hidden="true">#</a> 什么是Nginx？</h2><p>Nginx是一个 轻量级/高性能的反向代理Web服务器，用于 HTTP、HTTPS、SMTP、POP3 和 IMAP 协议。他实现非常高效的反向代理、负载平衡，他可以处理2-3万并发连接数，官方监测能支持5万并发，现在中国使用nginx网站用户有很多，例如：新浪、网易、 腾讯等。</p><h2 id="nginx-有哪些优点" tabindex="-1"><a class="header-anchor" href="#nginx-有哪些优点" aria-hidden="true">#</a> Nginx 有哪些优点？</h2><ul><li>跨平台、配置简单。</li><li>非阻塞、高并发连接：处理 2-3 万并发连接数，官方监测能支持 5 万并发。</li><li>内存消耗小：开启 10 个 Nginx 才占 150M 内存。</li><li>成本低廉，且开源。</li><li>稳定性高，宕机的概率非常小。</li><li>内置的健康检查功能：如果有一个服务器宕机，会做一个健康检查，再发送的请求就不会发送到宕机的服务器了。重新将请求提交到其他的节点上</li></ul><h2 id="nginx应用场景" tabindex="-1"><a class="header-anchor" href="#nginx应用场景" aria-hidden="true">#</a> Nginx应用场景？</h2><ul><li>http服务器。Nginx是一个http服务可以独立提供http服务。可以做网页静态服务器。</li><li>虚拟主机。可以实现在一台服务器虚拟出多个网站，例如个人网站使用的虚拟机。</li><li>反向代理，负载均衡。当网站的访问量达到一定程度后，单台服务器不能满足用户的请求时，需要用多台服务器集群可以使用nginx做反向代理。并且多台服务器可以平均分担负载，不会应为某台服务器负载高宕机而某台服务器闲置的情况。</li><li>nginz 中也可以配置安全管理、比如可以使用Nginx搭建API接口网关,对每个接口服务进行拦截。</li></ul><h2 id="nginx怎么处理请求的" tabindex="-1"><a class="header-anchor" href="#nginx怎么处理请求的" aria-hidden="true">#</a> Nginx怎么处理请求的？</h2><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>server {         # 第一个Server区块开始，表示一个独立的虚拟主机站点
    listen       80； # 提供服务的端口，默认80
    server_name  localhost; # 提供服务的域名主机名
    location / { # 第一个location区块开始
@@ -317,6 +317,6 @@ $server_port        //请求到达服务器的端口号,如：80
 }
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>保存并重启nginx，刷新页面（为了避免缓存，请强制刷新）就能看到效果了。以谷歌浏览器为例，通过F12看请求的响应头部：</p><p>我们可以先来对比下，如果我们没有开启zip压缩之前，我们的对应的文件大小，如下所示：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nginx/40-interview-fb46fd48-e596-48ac-8759-0663d29593af.png" alt=""></p><p>现在我们开启了gzip进行压缩后的文件的大小，可以看到如下所示：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nginx/40-interview-1ee18fd5-1cc1-478a-9fca-d15f85f0f5c7.png" alt=""></p><p>并且我们查看响应头会看到gzip这样的压缩，如下所示</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nginx/40-interview-c3c95717-45ee-4f56-b606-d56d2fc3cc57.png" alt=""></p><p>gzip压缩前后效果对比：jquery原大小90kb，压缩后只有30kb。</p><p>gzip虽然好用，但是以下类型的资源不建议启用。</p><h4 id="_1、图片类型" tabindex="-1"><a class="header-anchor" href="#_1、图片类型" aria-hidden="true">#</a> 1、图片类型</h4><p>原因：图片如jpg、png本身就会有压缩，所以就算开启gzip后，压缩前和压缩后大小没有多大区别，所以开启了反而会白白的浪费资源。（Tips：可以试试将一张jpg图片压缩为zip，观察大小并没有多大的变化。虽然zip和gzip算法不一样，但是可以看出压缩图片的价值并不大）</p><h4 id="_2、大文件" tabindex="-1"><a class="header-anchor" href="#_2、大文件" aria-hidden="true">#</a> 2、大文件</h4><p>原因：会消耗大量的cpu资源，且不一定有明显的效果。</p><h2 id="ngx-http-upstream-module的作用是什么" tabindex="-1"><a class="header-anchor" href="#ngx-http-upstream-module的作用是什么" aria-hidden="true">#</a> ngx_http_upstream_module的作用是什么?</h2><p>ngx_http_upstream_module用于定义可通过fastcgi传递、proxy传递、uwsgi传递、memcached传递和scgi传递指令来引用的服务器组。</p><h2 id="什么是c10k问题" tabindex="-1"><a class="header-anchor" href="#什么是c10k问题" aria-hidden="true">#</a> 什么是C10K问题?</h2><p>C10K问题是指无法同时处理大量客户端(10,000)的网络套接字。</p><h2 id="nginx是否支持将请求压缩到上游" tabindex="-1"><a class="header-anchor" href="#nginx是否支持将请求压缩到上游" aria-hidden="true">#</a> Nginx是否支持将请求压缩到上游?</h2><p>您可以使用Nginx模块gunzip将请求压缩到上游。gunzip模块是一个过滤器，它可以对不支持“gzip”编码方法的客户机或服务器使用“内容编码:gzip”来解压缩响应。</p><h2 id="如何在nginx中获得当前的时间" tabindex="-1"><a class="header-anchor" href="#如何在nginx中获得当前的时间" aria-hidden="true">#</a> 如何在Nginx中获得当前的时间?</h2><p>要获得Nginx的当前时间，必须使用SSI模块、和date_local的变量。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>Proxy_set_header THE-TIME $date_gmt;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h2 id="用nginx服务器解释-s的目的是什么" tabindex="-1"><a class="header-anchor" href="#用nginx服务器解释-s的目的是什么" aria-hidden="true">#</a> 用Nginx服务器解释-s的目的是什么?</h2><p>用于运行Nginx -s参数的可执行文件。</p><h2 id="如何在nginx服务器上添加模块" tabindex="-1"><a class="header-anchor" href="#如何在nginx服务器上添加模块" aria-hidden="true">#</a> 如何在Nginx服务器上添加模块?</h2><p>在编译过程中，必须选择Nginx模块，因为Nginx不支持模块的运行时间选择。</p><h2 id="生产中如何设置worker进程的数量呢" tabindex="-1"><a class="header-anchor" href="#生产中如何设置worker进程的数量呢" aria-hidden="true">#</a> 生产中如何设置worker进程的数量呢？</h2><p>在有多个cpu的情况下，可以设置多个worker，worker进程的数量可以设置到和cpu的核心数一样多，如果在单个cpu上起多个worker进程，那么操作系统会在多个worker之间进行调度，这种情况会降低系统性能，如果只有一个cpu，那么只启动一个worker进程就可以了。</p><h2 id="nginx状态码" tabindex="-1"><a class="header-anchor" href="#nginx状态码" aria-hidden="true">#</a> nginx状态码</h2><p>499：</p><p>服务端处理时间过长，客户端主动关闭了连接。</p><p>502：</p><p>(1).FastCGI进程是否已经启动</p><p>(2).FastCGI worker进程数是否不够</p><p>(3).FastCGI执行时间过长</p><ul><li>fastcgi_connect_timeout 300;</li><li>fastcgi_send_timeout 300;</li><li>fastcgi_read_timeout 300;</li></ul><p>(4).FastCGI Buffer不够，nginx和apache一样，有前端缓冲限制，可以调整缓冲参数</p><ul><li>fastcgi_buffer_size 32k;</li><li>fastcgi_buffers 8 32k;</li></ul><p>(5). Proxy Buffer不够，如果你用了Proxying，调整</p><ul><li>proxy_buffer_size 16k;</li><li>proxy_buffers 4 16k;</li></ul><p>(6).php脚本执行时间过长</p><ul><li>将php-fpm.conf的0s的0s改成一个时间</li></ul><hr><p>看完这 40 个 Nginx 的面试题，小二是感激涕零，感动的一塌糊涂。我拍了拍他的肩膀，安慰他说：“加油，未来是你的。”</p><hr><blockquote><p>原文链接：blog.csdn.net/wuzhiwei549/article/details/122758937，整理：沉默王二</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/nginx/40-interview.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/12 下午4:24:21</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/mianjing/redis12question.html" class="nav-link prev" aria-label="Redis：12道精选高频面试题"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->Redis：12道精选高频面试题</div></a><!----></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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aria-label="一、前言"><!---->一、前言<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">二、Java核心</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">三、Java企业级开发</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">3.1 开发工具</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/maven/maven.html" class="nav-link sidebar-link sidebar-page" aria-label="Maven"><!---->Maven<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/git/git-qiyuan.html" class="nav-link sidebar-link sidebar-page" aria-label="Git"><!---->Git<!----></a><ul 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aria-label="三、Nginx 常用命令"><!---->三、Nginx 常用命令<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/nginx/nginx.html#四、nginx-的配置" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="四、Nginx 的配置"><!---->四、Nginx 的配置<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/nginx/nginx.html#五、nginx-的学习资料" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="五、Nginx 的学习资料"><!---->五、Nginx 的学习资料<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.2 IDE/编辑器</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.3 Spring</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.4 SpringBoot</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.5 辅助工具</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.6 开源轮子</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.7 分布式</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.8 消息队列</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->5分钟带你深入浅出搞懂 Nginx</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2021年12月27日</span><meta property="datePublished" content="2021-12-27T01:41:01.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category5" role>Java企业级开发</li><meta property="articleSection" content="Java企业级开发"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Nginx</li></ul><meta property="keywords" content="Nginx"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 8 分钟</span><meta property="timeRequired" content="PT8M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/nginx/nginx.html#一、nginx-的作用" class="router-link-active router-link-exact-active toc-link level3">一、Nginx 的作用</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nginx/nginx.html#二、nginx-的安装" class="router-link-active router-link-exact-active toc-link level3">二、Nginx 的安装</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nginx/nginx.html#三、nginx-常用命令" class="router-link-active router-link-exact-active toc-link level3">三、Nginx 常用命令</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nginx/nginx.html#四、nginx-的配置" class="router-link-active router-link-exact-active toc-link level3">四、Nginx 的配置</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nginx/nginx.html#五、nginx-的学习资料" class="router-link-active router-link-exact-active toc-link level3">五、Nginx 的学习资料</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="_5分钟带你深入浅出搞懂-nginx" tabindex="-1"><a class="header-anchor" href="#_5分钟带你深入浅出搞懂-nginx" aria-hidden="true">#</a> 5分钟带你深入浅出搞懂 Nginx</h1><p>最近在搭建一个网站，就不可避免地要用到 Nginx，索性就出一期 Nginx 的入门教程，希望也可以帮助到大家~😁</p><p>作为开发者，相信大家都知道 Nginx 的重要性。Nginx 是一个高性能的 HTTP 和反向代理 Web 服务器，由俄罗斯的伊戈尔·赛索耶夫开发，第一个版本发布于 2004 年 10 月 4 日。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nginx/nginx-01.png" alt=""></p><p>Nginx 的特点是：</p><ul><li>内存占用少</li><li>并发能力强（可支持大约 50000 个并发连接）</li><li>配置超简洁</li><li>bug 非常少</li><li>安装超简单</li><li>服务特别稳（几个月也不需要重启）</li></ul><p>基于这些特点，越来越多的网站开始使用 Nginx。于是，掌握 Nginx 就变成了开发者的一项必不可少的技能。</p><h3 id="一、nginx-的作用" tabindex="-1"><a class="header-anchor" href="#一、nginx-的作用" aria-hidden="true">#</a> 一、Nginx 的作用</h3><p><strong>反向代理</strong>是 Nginx 作为 Web 服务器最常用的功能之一。什么是反向代理呢？很多初学者在第一次遇到这个名词的时候总免不了出现很多问号。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nginx/nginx-02.png" alt=""></p><p>那要想搞明白什么是反向代理，就必须得搞明白什么是正向代理。</p><p>举个例子，小二的浏览器是无法直接访问谷哥的，但香港的代理服务器是可以访问谷哥的，于是小二访问了香港的代理服务器，也就间接地访问了谷哥。那这台代理服务器也就是<strong>正向代理</strong>。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nginx/nginx-03.png" alt=""></p><p>总结一句就是，<strong>正向代理是代理客户端的</strong>，让你能正常访问目的服务器。</p><p>与之相反，<strong>反向代理是代理服务器的</strong>，让大量的请求均衡地访问到某一台服务器上。</p><p>举个例子，10 万个小二同时在访问 itwanger.com， 如果只有一台服务器的话，很容易就瘫痪了，于是高并发的情况下会有很多台服务器（假如 10 台吧）来接这个活，那怎么让 10 万个小二访问到这 10 台服务器呢？</p><p>这就需要一个反向代理服务器了，反向代理服务器让 1 万个小二访问服务器 A，1 万个小二访问服务器 B，1 个小二访问服务器 C，这样的话，每台服务器的压力就相应减小了，是不是很 nice？</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nginx/nginx-04.png" alt=""></p><p>那问题来了。每台服务器的能力可能不同，比如说服务器 A 的内存比较大一点，有 100 个 G；服务器 B 的内存小一点，有 10 个 G；服务器 C 的内存更小一点，只有 1 个 G。怎么才能让没台服务器承担起它能力范围内的访问呢？</p><p><strong>Nginx 内置了轮询和加权轮询来达到负载均衡的目的</strong>。服务器 A 牛逼就把它的权重加大一点，让 5 万个小二访问它；服务器 B 弱一点，权重就再小一点，让 2 万个小二访问它；服务器 C 更弱，权重就最小，让 1 万个小二访问它。</p><p>除此之外，Nginx 还有一个很牛逼的功能是<strong>动静分离</strong>。</p><p>在我们的软件开发中，有些请求是需要后台处理的；有些请求是不需要后台处理的，比如说 css、js 这些文件请求，这些不需要经过后台处理的文件就叫静态文件。</p><p>我们可以根据一些规则，把动态资源和静态资源分开，然后通过 Nginx 把请求分开，静态资源的请求就不需要经过 Web 服务器处理了，从而提高整体上的资源的响应速度。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nginx/nginx-05.png" alt=""></p><h3 id="二、nginx-的安装" tabindex="-1"><a class="header-anchor" href="#二、nginx-的安装" aria-hidden="true">#</a> 二、Nginx 的安装</h3><p>针对不同的操作系统，Nginx 的安装各不相同。Windows 可以直接到官网下载 zip 绿色安装包，解压后就可以了。</p><blockquote><p>http://nginx.org/en/download.html</p></blockquote><p>之前带大家白票过阿里云的服务器，有 Linux 服务器的话，直接通过<a href="https://mp.weixin.qq.com/s/ditN9J80rSWwnYRumwb4ww" target="_blank" rel="noopener noreferrer">宝塔面板<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>这个神器就可以安装了。</p><p>不过，如果在安装宝塔面板必备工具包的时候，如果选择了 phpmyadmin（MySQL 的管理工具），会覆盖掉 80 端口，就导致没办法直接通过默认配置的方式访问 Nginx 启动页面了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nginx/nginx-06.png" alt=""></p><p>我这里以 macOS 环境为例，来演示一下。</p><p>第一步，通过 <code>brew info nginx</code> 命令查看 Nginx 是否安装。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nginx/nginx-07.png" alt=""></p><p>第二步，通过 <code>brew install nginx</code> 命令安装 Nginx。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nginx/nginx-08.png" alt=""></p><p>从以上信息可以得出：</p><ul><li>根目录是 <code>/usr/local/var/www</code></li><li>配置文件是 <code>/usr/local/etc/nginx/nginx.conf</code></li><li>默认端口是 8080</li></ul><p>第三步，通过 <code>nginx</code> 命令启动 Nginx。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nginx/nginx-09.png" alt=""></p><p>第四步，在浏览器地址栏通过 <code>localhost:8080</code> 访问，可以看到以下欢迎页面。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nginx/nginx-10.png" alt=""></p><h3 id="三、nginx-常用命令" tabindex="-1"><a class="header-anchor" href="#三、nginx-常用命令" aria-hidden="true">#</a> 三、Nginx 常用命令</h3><p>通常来说，Nginx 一旦启动后，我们是很少让它退出的，使用最多的就是 reload 命令。当我们修改了配置文件，是需要执行一次 reload 命令让 Nginx 生效的。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>nginx  启动
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right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->5分钟带你深入浅出搞懂 Nginx</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2021年12月27日</span><meta property="datePublished" content="2021-12-27T01:41:01.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category5" role>Java企业级开发</li><meta property="articleSection" content="Java企业级开发"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Nginx</li></ul><meta property="keywords" content="Nginx"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 8 分钟</span><meta property="timeRequired" content="PT8M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/nginx/nginx.html#一、nginx-的作用" class="router-link-active router-link-exact-active toc-link level3">一、Nginx 的作用</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nginx/nginx.html#二、nginx-的安装" class="router-link-active router-link-exact-active toc-link level3">二、Nginx 的安装</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nginx/nginx.html#三、nginx-常用命令" class="router-link-active router-link-exact-active toc-link level3">三、Nginx 常用命令</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nginx/nginx.html#四、nginx-的配置" class="router-link-active router-link-exact-active toc-link level3">四、Nginx 的配置</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nginx/nginx.html#五、nginx-的学习资料" class="router-link-active router-link-exact-active toc-link level3">五、Nginx 的学习资料</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="_5分钟带你深入浅出搞懂-nginx" tabindex="-1"><a class="header-anchor" href="#_5分钟带你深入浅出搞懂-nginx" aria-hidden="true">#</a> 5分钟带你深入浅出搞懂 Nginx</h1><p>最近在搭建一个网站，就不可避免地要用到 Nginx，索性就出一期 Nginx 的入门教程，希望也可以帮助到大家~😁</p><p>作为开发者，相信大家都知道 Nginx 的重要性。Nginx 是一个高性能的 HTTP 和反向代理 Web 服务器，由俄罗斯的伊戈尔·赛索耶夫开发，第一个版本发布于 2004 年 10 月 4 日。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nginx/nginx-01.png" alt=""></p><p>Nginx 的特点是：</p><ul><li>内存占用少</li><li>并发能力强（可支持大约 50000 个并发连接）</li><li>配置超简洁</li><li>bug 非常少</li><li>安装超简单</li><li>服务特别稳（几个月也不需要重启）</li></ul><p>基于这些特点，越来越多的网站开始使用 Nginx。于是，掌握 Nginx 就变成了开发者的一项必不可少的技能。</p><h3 id="一、nginx-的作用" tabindex="-1"><a class="header-anchor" href="#一、nginx-的作用" aria-hidden="true">#</a> 一、Nginx 的作用</h3><p><strong>反向代理</strong>是 Nginx 作为 Web 服务器最常用的功能之一。什么是反向代理呢？很多初学者在第一次遇到这个名词的时候总免不了出现很多问号。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nginx/nginx-02.png" alt=""></p><p>那要想搞明白什么是反向代理，就必须得搞明白什么是正向代理。</p><p>举个例子，小二的浏览器是无法直接访问谷哥的，但香港的代理服务器是可以访问谷哥的，于是小二访问了香港的代理服务器，也就间接地访问了谷哥。那这台代理服务器也就是<strong>正向代理</strong>。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nginx/nginx-03.png" alt=""></p><p>总结一句就是，<strong>正向代理是代理客户端的</strong>，让你能正常访问目的服务器。</p><p>与之相反，<strong>反向代理是代理服务器的</strong>，让大量的请求均衡地访问到某一台服务器上。</p><p>举个例子，10 万个小二同时在访问 itwanger.com， 如果只有一台服务器的话，很容易就瘫痪了，于是高并发的情况下会有很多台服务器（假如 10 台吧）来接这个活，那怎么让 10 万个小二访问到这 10 台服务器呢？</p><p>这就需要一个反向代理服务器了，反向代理服务器让 1 万个小二访问服务器 A，1 万个小二访问服务器 B，1 个小二访问服务器 C，这样的话，每台服务器的压力就相应减小了，是不是很 nice？</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nginx/nginx-04.png" alt=""></p><p>那问题来了。每台服务器的能力可能不同，比如说服务器 A 的内存比较大一点，有 100 个 G；服务器 B 的内存小一点，有 10 个 G；服务器 C 的内存更小一点，只有 1 个 G。怎么才能让没台服务器承担起它能力范围内的访问呢？</p><p><strong>Nginx 内置了轮询和加权轮询来达到负载均衡的目的</strong>。服务器 A 牛逼就把它的权重加大一点，让 5 万个小二访问它；服务器 B 弱一点，权重就再小一点，让 2 万个小二访问它；服务器 C 更弱，权重就最小，让 1 万个小二访问它。</p><p>除此之外，Nginx 还有一个很牛逼的功能是<strong>动静分离</strong>。</p><p>在我们的软件开发中，有些请求是需要后台处理的；有些请求是不需要后台处理的，比如说 css、js 这些文件请求，这些不需要经过后台处理的文件就叫静态文件。</p><p>我们可以根据一些规则，把动态资源和静态资源分开，然后通过 Nginx 把请求分开，静态资源的请求就不需要经过 Web 服务器处理了，从而提高整体上的资源的响应速度。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nginx/nginx-05.png" alt=""></p><h3 id="二、nginx-的安装" tabindex="-1"><a class="header-anchor" href="#二、nginx-的安装" aria-hidden="true">#</a> 二、Nginx 的安装</h3><p>针对不同的操作系统，Nginx 的安装各不相同。Windows 可以直接到官网下载 zip 绿色安装包，解压后就可以了。</p><blockquote><p>http://nginx.org/en/download.html</p></blockquote><p>之前带大家白票过阿里云的服务器，有 Linux 服务器的话，直接通过<a href="https://mp.weixin.qq.com/s/ditN9J80rSWwnYRumwb4ww" target="_blank" rel="noopener noreferrer">宝塔面板<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>这个神器就可以安装了。</p><p>不过，如果在安装宝塔面板必备工具包的时候，如果选择了 phpmyadmin（MySQL 的管理工具），会覆盖掉 80 端口，就导致没办法直接通过默认配置的方式访问 Nginx 启动页面了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nginx/nginx-06.png" alt=""></p><p>我这里以 macOS 环境为例，来演示一下。</p><p>第一步，通过 <code>brew info nginx</code> 命令查看 Nginx 是否安装。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nginx/nginx-07.png" alt=""></p><p>第二步，通过 <code>brew install nginx</code> 命令安装 Nginx。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nginx/nginx-08.png" alt=""></p><p>从以上信息可以得出：</p><ul><li>根目录是 <code>/usr/local/var/www</code></li><li>配置文件是 <code>/usr/local/etc/nginx/nginx.conf</code></li><li>默认端口是 8080</li></ul><p>第三步，通过 <code>nginx</code> 命令启动 Nginx。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nginx/nginx-09.png" alt=""></p><p>第四步，在浏览器地址栏通过 <code>localhost:8080</code> 访问，可以看到以下欢迎页面。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nginx/nginx-10.png" alt=""></p><h3 id="三、nginx-常用命令" tabindex="-1"><a class="header-anchor" href="#三、nginx-常用命令" aria-hidden="true">#</a> 三、Nginx 常用命令</h3><p>通常来说，Nginx 一旦启动后，我们是很少让它退出的，使用最多的就是 reload 命令。当我们修改了配置文件，是需要执行一次 reload 命令让 Nginx 生效的。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>nginx  启动
 nginx -s stop  停止
 nginx -s quit  安全退出
 nginx -s reload  重新加载配置文件
@@ -97,6 +97,6 @@ http {
   &lt;/body&gt;
 &lt;/html&gt;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>很言简意赅，总之就是二哥，牛逼~</p><p>好，保存配置文件，并且 reload Nginx，我们在本地的浏览器中输入服务器的 IP 地址就可以看到效果了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nginx/nginx-12.png" alt=""></p><h3 id="五、nginx-的学习资料" tabindex="-1"><a class="header-anchor" href="#五、nginx-的学习资料" aria-hidden="true">#</a> 五、Nginx 的学习资料</h3><p>关于 Nginx 的负载均衡，还有动静分离，等到二哥的网站跑起来后，可以专门搞个视频给大家演示下，比较直观一点。Nginx 的入门非常简单，但有一说一，如果想要在工作中用好 Nginx，还是需要花费一番功夫的。</p><p>我这里再给大家推荐一些不错的学习资料吧。</p><p><strong>1）狂神说的视频入门教程</strong>，我个人觉得，狂神的入门教程还是非常舒适的，语速和内容都刚刚好。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nginx/nginx-13.png" alt=""></p><blockquote><p>https://www.bilibili.com/video/BV1F5411J7vK</p></blockquote><p><strong>2）黑马程序员Nginx教程</strong>，总共 159 讲，基本上算是非常全面的 Nginx 的视频教程了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nginx/nginx-14.png" alt=""></p><blockquote><p>https://www.bilibili.com/video/BV1ov41187bq</p></blockquote><p><strong>3）极客时间上的 Nginx100 讲</strong>，讲的比较深一点，涉及到不少原理层面的东西。钱包比较鼓的话，可以去付费下。不过，听说在某个地方也可以白票。</p><p><strong>4）Nginx 从入门到实践，万字详解</strong>，图文版的，可以到掘金上看看这篇文章，内容基本上面面俱到了（可以看一下下面的目录），配合前面的视频课，拿下 Nginx 基本上是稳了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nginx/nginx-15.png" alt=""></p><blockquote><p>https://juejin.cn/post/6844904144235413512</p></blockquote><p>这些资料如果能全部过一遍的话，我要喊你 Nginx 小王子了，估计公司遇到 Nginx 问题的话，你肯定是解决问题的那一个。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/nginx/nginx.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/6/8 下午2:51:04</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/git/git-qiyuan.html" class="nav-link prev" aria-label="Git"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->Git</div></a><!----></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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toc-link level3">用起来</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/BOKEYUANruhegaoxiaodixuexijishu.html#技术分享" class="router-link-active router-link-exact-active toc-link level3">技术分享</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/BOKEYUANruhegaoxiaodixuexijishu.html#造个轮子" class="router-link-active router-link-exact-active toc-link level3">造个轮子</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><ul><li><a href="#what">学什么</a></li><li><a href="#base">基础与应用</a></li><li><a href="#wide">广度与深度</a></li><li><a href="#philosophy">哲学</a></li><li><a href="#english">英语</a></li><li><a href="#how">怎么学</a></li><li><a href="#system">知识体系</a></li><li><a href="#forget">克服遗忘</a></li><li><a href="#fragment">碎片时间</a></li><li><a href="#use">用起来</a></li><li><a href="#share">技术分享</a></li><li><a href="#wheel">造个轮子</a></li></ul><p>我们相信努力学习一定会有收获，但是方法不当，既让人身心疲惫，也没有切实的回报。高中时代，我的同桌是个漂亮女同学。她的物理成绩很差，虽然她非常勤奋的学习，但成绩总是不理想。为了巩固纯洁的同学关系，我亲密无间地辅导她的物理，发现<strong>她不知道题目考什么</strong>。我们的教科书与试题都围绕着考试大纲展开，看到一道题，应该先想想它在考哪些定理和公式的运用。<br>   不少朋友每天都阅读技术文章，但是第二天就忘干净了。工作中领导和同事都认可你的沟通和技术能力，但是跳槽面试却屡屡碰壁。面试官问技术方案，明明心里清楚，用嘴说出来却前言不搭后语。面试官再问底层算法，你说看过但是忘记了。他不在乎你看没看过，答不上就是零分。正如男女相亲，男方谈吐潇洒才能吸引姑娘。可是男方紧张了，平时挺能说，关键时候却支支吾吾，姑娘必然认为他不行。人生充满了许多考试，有形的和无形的，每次考试的机会只有一次。<br>   工作五年十年后，别人成了架构师，自己还在基层打滚，原因是什么？职场上无法成功升迁的原因有很多，没有持续学习、学习效果不好、无法通过心仪公司的的面试，一定是很重要的原因。<br>   <strong>把自己当成一台计算机，既有输入，也要有输出，用输出倒逼输入</strong>。</p><h3 id="学什么" tabindex="-1"><a class="header-anchor" href="#学什么" aria-hidden="true">#</a> 学什么</h3><h4 id="基础与应用" tabindex="-1"><a class="header-anchor" href="#基础与应用" aria-hidden="true">#</a> 基础与应用</h4><p>近些年诞生了许多新技术，比如最时髦的AI(目前还在智障阶段)，数学基础是初中就接触过的概率统计。万丈高楼从地起，不要被新工具或者中间件迷住双眼，一味地追新求快。基础知识是所有技术的基石，在未来很长的时间都不会变化，应该花费足够的时间巩固基础。<br>   以数据结构和算法为例，大家阅读一下Java的BitSet的源码，里面有大量的移位操作，移位运算掌握的好，看这份源码就没问题。Java同步工具类AQS用到了双向链表，链表知识不过关，肯定搞不懂它的原理。互联网大厂都喜欢考算法，为了通过面试也要精通算法。<br>   以Java工程师应该掌握的知识为例，按重要程度排出六个梯度：</p><ul><li>第一梯度：计算机组成原理、数据结构和算法、网络通信原理、操作系统原理；</li><li>第二梯度：Java基础、JVM内存模型和GC算法、JVM性能调优、JDK工具、设计模式；</li><li>第三梯度：Spring系列、Mybatis、Dubbo等主流框架的运用和原理；</li><li>第四梯度：MySQL(含SQL编程)、Redis、RabbitMQ/RocketMQ/Kafka、ZooKeeper等数据库或者中间件的运用和原理；</li><li>第五梯度：CAP理论、BASE理论、Paxos和Raft算法等其他分布式理论；</li><li>第六梯度：容器化、大数据、AI、区块链等等前沿技术理论；</li></ul><p>有同学认为第五梯度应该在移到第一梯度。其实很多小公司的日活犹如古天乐一样平平无奇，离大型分布式架构还远得很。学习框架和中间件的时候，顺手掌握分布式理论，效果更好。</p><h4 id="广度与深度" tabindex="-1"><a class="header-anchor" href="#广度与深度" aria-hidden="true">#</a> 广度与深度</h4><p>许多公司的招聘JD没有设定技术人员年龄门槛，但是会加上一句“具备与年龄相当的知识的广度与深度”。多广才算广，多深才算深？这是很主观的话题，这里不展开讨论。<br>   如何变得更广更深呢？<strong>突破收入上升的瓶颈，发掘自己真正的兴趣</strong>。<br>   大多数人只是公司的普通职员，收入上升的瓶颈就是升职加薪。许多IT公司会对技术人员有个评级，如果你的评级不高，那就依照晋级章程努力升级。如果你在一个小公司，收入一般，发展前景不明，准备大厂的面试就是最好的学习过程。在这些过程中，你必然学习更多知识，变得更广更深。<br>   个人兴趣是前进的动力之一，许多知名开源项目都源于作者的兴趣。个人兴趣并不局限技术领域，可以是其他学科。我有个朋友喜欢玩山地自行车，还给一些做自行车话题的自媒体投稿。久而久之，居然能够写一手好文章了，我相信他也能写好技术文档。</p><h4 id="哲学" tabindex="-1"><a class="header-anchor" href="#哲学" aria-hidden="true">#</a> 哲学</h4><p>哲学不是故作高深的学科，它的现实意义就是解决问题。年轻小伙是怎么泡妞的？三天两头花不断，大庭广众跪求爱。这类套路为什么总是能成功呢？礼物满足女人的物欲，当众求爱满足女人的虚荣心，投其所好。食堂大妈打菜的手越来越抖，辣子鸡丁变成辣子辣丁，为什么呢？食堂要控制成本，直接提价会惹众怒。<br>   科学上的哲学，一般指研究事物发展的规律，归纳终极的解决方案。软件行业充满哲学味道的作品非常多，比如<a href="https://item.jd.com/12401749.html" target="_blank" rel="noopener noreferrer">《人月神话》<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>。举个例子，当软件系统遇到性能问题，尝试下面两种哲学思想提升性能：</p><ul><li>空间换时间：比如引入缓存，消耗额外的存储提高响应速度。</li><li>时间换空间：比如大文件的分片处理，分段处理后再汇总结果。</li></ul><p>设计稳健高可用的系统，尝试从三个方面考虑问题：</p><ul><li>存储：数据会丢失吗，数据一致性怎么解决。</li><li>计算：计算怎么扩容，应用允许任意增加节点吗。</li><li>传输：网络中断或拥塞怎么办。</li></ul><p>从无数的失败或者成功的经验中，总结出高度概括性的方案，让我们下一步做的更好。</p><h4 id="英语" tabindex="-1"><a class="header-anchor" href="#英语" aria-hidden="true">#</a> 英语</h4><p>英语是极为重要的基础，学好英语与掌握编程语言一样重要。且不说外企对英语的要求，许多知名博客就是把英文翻译成中文，充当知识的搬运工。如果英语足够好，直接阅读一手英语资料，避免他人翻译存在的谬误。</p><h3 id="怎么学" tabindex="-1"><a class="header-anchor" href="#怎么学" aria-hidden="true">#</a> 怎么学</h3><h4 id="知识体系" tabindex="-1"><a class="header-anchor" href="#知识体系" aria-hidden="true">#</a> 知识体系</h4><p>体系化的知识比零散的更容易记忆和理解，这正如一部好的电视剧，剧情环环相扣才能吸引观众。建议大家使用思维导图罗列知识点，构建体系结构，如下图所示：</p><p><img src="https://img2018.cnblogs.com/blog/31085/201906/31085-20190607182832666-1215142380.png" alt=""></p><h4 id="克服遗忘" tabindex="-1"><a class="header-anchor" href="#克服遗忘" aria-hidden="true">#</a> 克服遗忘</h4><p>高中是我们知识的巅峰时刻，每周小考每月大考，教辅资料堆成山，地狱式的反复操练强化记忆。复习是对抗遗忘的唯一办法。大脑的遗忘是有规律的，先快后慢。一天后，学到的知识只剩下原来的25%，甚至更低。随着时间的推移，遗忘的速度减慢，遗忘的数量也就减少。</p><p>时间间隔</p><p>记忆量</p><p>刚看完</p><p>100%</p><p>20分钟后</p><p>60%</p><p>1小时后</p><p>40%</p><p>1天后</p><p>30%</p><p>2天后</p><p>27%</p><p>每个人的遗忘程度都不一样，建议第二天复习前一天的内容，七天后复习这段时间的所有内容。</p><h4 id="碎片时间" tabindex="-1"><a class="header-anchor" href="#碎片时间" aria-hidden="true">#</a> 碎片时间</h4><p>不少朋友利用碎片时间学习，比如在公交上看公众号的推送。其实我们都高估了自己的抗干扰能力，如果处在嘈杂的环境，注意力容易被打断，记忆留存度也很低。碎片时间适合学习简单孤立的知识点，比如链表的定义与实现。<br>   学习复杂的知识，需要大段的连续时间。图书馆是个好地方，安静氛围好。手机放一边，不要理会QQ微信，最好阅读纸质书，泡上一整天。有些城市出现了付费自习室，提供格子间、茶水等等，也是非常好的选择。</p><h3 id="用起来" tabindex="-1"><a class="header-anchor" href="#用起来" aria-hidden="true">#</a> 用起来</h3><h3 id="技术分享" tabindex="-1"><a class="header-anchor" href="#技术分享" aria-hidden="true">#</a> 技术分享</h3><p>从下面这张图我们可以看到，教授他人是知识留存率最高的方式。<br><img src="https://img2018.cnblogs.com/blog/31085/201905/31085-20190527232022474-1815067006.png" alt=""></p><p>准备PPT和演讲内容，给同事来一场技术分享。不光复习知识，还锻炼口才。曾经有个同事说话又快又急，口头禅也多，比如&quot;对吧、是不是”，别人经常听不清，但是他本人不以为然。领导让他做了几次技术分享，听众的反应可想而知，他才彻底认清缺点。<br>   坚持写技术博客，别在意你写的东西在网上已经重复千百遍。当自己动手的时候，才会意识到眼高手低。让文章读起来流畅清晰，需要呕心沥血的删改。写作是对大脑的长期考验，想不到肯定写不出，想不清楚肯定写不清楚。</p><h3 id="造个轮子" tabindex="-1"><a class="header-anchor" href="#造个轮子" aria-hidden="true">#</a> 造个轮子</h3><p>我们经常说不要重复造轮子。为了开发效率，可以不造轮子，但是必须具备造轮子的能力。建议造一个简单的MQ，你能用到通信协议、设计模式、队列等许多知识。在造轮子的过程中，你会频繁的翻阅各种手册或者博客，这就是<strong>用输出倒逼输入</strong>。</p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/nice-article/BOKEYUANruhegaoxiaodixuexijishu.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 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class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/BOKEYUANruhegaoxiaodixuexijishu.html#学什么" class="router-link-active router-link-exact-active toc-link level3">学什么</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/BOKEYUANruhegaoxiaodixuexijishu.html#怎么学" class="router-link-active router-link-exact-active toc-link level3">怎么学</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/BOKEYUANruhegaoxiaodixuexijishu.html#用起来" class="router-link-active router-link-exact-active toc-link level3">用起来</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/BOKEYUANruhegaoxiaodixuexijishu.html#技术分享" class="router-link-active router-link-exact-active toc-link level3">技术分享</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/BOKEYUANruhegaoxiaodixuexijishu.html#造个轮子" class="router-link-active router-link-exact-active toc-link level3">造个轮子</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><ul><li><a href="#what">学什么</a></li><li><a href="#base">基础与应用</a></li><li><a href="#wide">广度与深度</a></li><li><a href="#philosophy">哲学</a></li><li><a href="#english">英语</a></li><li><a href="#how">怎么学</a></li><li><a href="#system">知识体系</a></li><li><a href="#forget">克服遗忘</a></li><li><a href="#fragment">碎片时间</a></li><li><a href="#use">用起来</a></li><li><a href="#share">技术分享</a></li><li><a href="#wheel">造个轮子</a></li></ul><p>我们相信努力学习一定会有收获，但是方法不当，既让人身心疲惫，也没有切实的回报。高中时代，我的同桌是个漂亮女同学。她的物理成绩很差，虽然她非常勤奋的学习，但成绩总是不理想。为了巩固纯洁的同学关系，我亲密无间地辅导她的物理，发现<strong>她不知道题目考什么</strong>。我们的教科书与试题都围绕着考试大纲展开，看到一道题，应该先想想它在考哪些定理和公式的运用。<br>   不少朋友每天都阅读技术文章，但是第二天就忘干净了。工作中领导和同事都认可你的沟通和技术能力，但是跳槽面试却屡屡碰壁。面试官问技术方案，明明心里清楚，用嘴说出来却前言不搭后语。面试官再问底层算法，你说看过但是忘记了。他不在乎你看没看过，答不上就是零分。正如男女相亲，男方谈吐潇洒才能吸引姑娘。可是男方紧张了，平时挺能说，关键时候却支支吾吾，姑娘必然认为他不行。人生充满了许多考试，有形的和无形的，每次考试的机会只有一次。<br>   工作五年十年后，别人成了架构师，自己还在基层打滚，原因是什么？职场上无法成功升迁的原因有很多，没有持续学习、学习效果不好、无法通过心仪公司的的面试，一定是很重要的原因。<br>   <strong>把自己当成一台计算机，既有输入，也要有输出，用输出倒逼输入</strong>。</p><h3 id="学什么" tabindex="-1"><a class="header-anchor" href="#学什么" aria-hidden="true">#</a> 学什么</h3><h4 id="基础与应用" tabindex="-1"><a class="header-anchor" href="#基础与应用" aria-hidden="true">#</a> 基础与应用</h4><p>近些年诞生了许多新技术，比如最时髦的AI(目前还在智障阶段)，数学基础是初中就接触过的概率统计。万丈高楼从地起，不要被新工具或者中间件迷住双眼，一味地追新求快。基础知识是所有技术的基石，在未来很长的时间都不会变化，应该花费足够的时间巩固基础。<br>   以数据结构和算法为例，大家阅读一下Java的BitSet的源码，里面有大量的移位操作，移位运算掌握的好，看这份源码就没问题。Java同步工具类AQS用到了双向链表，链表知识不过关，肯定搞不懂它的原理。互联网大厂都喜欢考算法，为了通过面试也要精通算法。<br>   以Java工程师应该掌握的知识为例，按重要程度排出六个梯度：</p><ul><li>第一梯度：计算机组成原理、数据结构和算法、网络通信原理、操作系统原理；</li><li>第二梯度：Java基础、JVM内存模型和GC算法、JVM性能调优、JDK工具、设计模式；</li><li>第三梯度：Spring系列、Mybatis、Dubbo等主流框架的运用和原理；</li><li>第四梯度：MySQL(含SQL编程)、Redis、RabbitMQ/RocketMQ/Kafka、ZooKeeper等数据库或者中间件的运用和原理；</li><li>第五梯度：CAP理论、BASE理论、Paxos和Raft算法等其他分布式理论；</li><li>第六梯度：容器化、大数据、AI、区块链等等前沿技术理论；</li></ul><p>有同学认为第五梯度应该在移到第一梯度。其实很多小公司的日活犹如古天乐一样平平无奇，离大型分布式架构还远得很。学习框架和中间件的时候，顺手掌握分布式理论，效果更好。</p><h4 id="广度与深度" tabindex="-1"><a class="header-anchor" href="#广度与深度" aria-hidden="true">#</a> 广度与深度</h4><p>许多公司的招聘JD没有设定技术人员年龄门槛，但是会加上一句“具备与年龄相当的知识的广度与深度”。多广才算广，多深才算深？这是很主观的话题，这里不展开讨论。<br>   如何变得更广更深呢？<strong>突破收入上升的瓶颈，发掘自己真正的兴趣</strong>。<br>   大多数人只是公司的普通职员，收入上升的瓶颈就是升职加薪。许多IT公司会对技术人员有个评级，如果你的评级不高，那就依照晋级章程努力升级。如果你在一个小公司，收入一般，发展前景不明，准备大厂的面试就是最好的学习过程。在这些过程中，你必然学习更多知识，变得更广更深。<br>   个人兴趣是前进的动力之一，许多知名开源项目都源于作者的兴趣。个人兴趣并不局限技术领域，可以是其他学科。我有个朋友喜欢玩山地自行车，还给一些做自行车话题的自媒体投稿。久而久之，居然能够写一手好文章了，我相信他也能写好技术文档。</p><h4 id="哲学" tabindex="-1"><a class="header-anchor" href="#哲学" aria-hidden="true">#</a> 哲学</h4><p>哲学不是故作高深的学科，它的现实意义就是解决问题。年轻小伙是怎么泡妞的？三天两头花不断，大庭广众跪求爱。这类套路为什么总是能成功呢？礼物满足女人的物欲，当众求爱满足女人的虚荣心，投其所好。食堂大妈打菜的手越来越抖，辣子鸡丁变成辣子辣丁，为什么呢？食堂要控制成本，直接提价会惹众怒。<br>   科学上的哲学，一般指研究事物发展的规律，归纳终极的解决方案。软件行业充满哲学味道的作品非常多，比如<a href="https://item.jd.com/12401749.html" target="_blank" rel="noopener noreferrer">《人月神话》<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>。举个例子，当软件系统遇到性能问题，尝试下面两种哲学思想提升性能：</p><ul><li>空间换时间：比如引入缓存，消耗额外的存储提高响应速度。</li><li>时间换空间：比如大文件的分片处理，分段处理后再汇总结果。</li></ul><p>设计稳健高可用的系统，尝试从三个方面考虑问题：</p><ul><li>存储：数据会丢失吗，数据一致性怎么解决。</li><li>计算：计算怎么扩容，应用允许任意增加节点吗。</li><li>传输：网络中断或拥塞怎么办。</li></ul><p>从无数的失败或者成功的经验中，总结出高度概括性的方案，让我们下一步做的更好。</p><h4 id="英语" tabindex="-1"><a class="header-anchor" href="#英语" aria-hidden="true">#</a> 英语</h4><p>英语是极为重要的基础，学好英语与掌握编程语言一样重要。且不说外企对英语的要求，许多知名博客就是把英文翻译成中文，充当知识的搬运工。如果英语足够好，直接阅读一手英语资料，避免他人翻译存在的谬误。</p><h3 id="怎么学" tabindex="-1"><a class="header-anchor" href="#怎么学" aria-hidden="true">#</a> 怎么学</h3><h4 id="知识体系" tabindex="-1"><a class="header-anchor" href="#知识体系" aria-hidden="true">#</a> 知识体系</h4><p>体系化的知识比零散的更容易记忆和理解，这正如一部好的电视剧，剧情环环相扣才能吸引观众。建议大家使用思维导图罗列知识点，构建体系结构，如下图所示：</p><p><img src="https://img2018.cnblogs.com/blog/31085/201906/31085-20190607182832666-1215142380.png" alt=""></p><h4 id="克服遗忘" tabindex="-1"><a class="header-anchor" href="#克服遗忘" aria-hidden="true">#</a> 克服遗忘</h4><p>高中是我们知识的巅峰时刻，每周小考每月大考，教辅资料堆成山，地狱式的反复操练强化记忆。复习是对抗遗忘的唯一办法。大脑的遗忘是有规律的，先快后慢。一天后，学到的知识只剩下原来的25%，甚至更低。随着时间的推移，遗忘的速度减慢，遗忘的数量也就减少。</p><p>时间间隔</p><p>记忆量</p><p>刚看完</p><p>100%</p><p>20分钟后</p><p>60%</p><p>1小时后</p><p>40%</p><p>1天后</p><p>30%</p><p>2天后</p><p>27%</p><p>每个人的遗忘程度都不一样，建议第二天复习前一天的内容，七天后复习这段时间的所有内容。</p><h4 id="碎片时间" tabindex="-1"><a class="header-anchor" href="#碎片时间" aria-hidden="true">#</a> 碎片时间</h4><p>不少朋友利用碎片时间学习，比如在公交上看公众号的推送。其实我们都高估了自己的抗干扰能力，如果处在嘈杂的环境，注意力容易被打断，记忆留存度也很低。碎片时间适合学习简单孤立的知识点，比如链表的定义与实现。<br>   学习复杂的知识，需要大段的连续时间。图书馆是个好地方，安静氛围好。手机放一边，不要理会QQ微信，最好阅读纸质书，泡上一整天。有些城市出现了付费自习室，提供格子间、茶水等等，也是非常好的选择。</p><h3 id="用起来" tabindex="-1"><a class="header-anchor" href="#用起来" aria-hidden="true">#</a> 用起来</h3><h3 id="技术分享" tabindex="-1"><a class="header-anchor" href="#技术分享" aria-hidden="true">#</a> 技术分享</h3><p>从下面这张图我们可以看到，教授他人是知识留存率最高的方式。<br><img src="https://img2018.cnblogs.com/blog/31085/201905/31085-20190527232022474-1815067006.png" alt=""></p><p>准备PPT和演讲内容，给同事来一场技术分享。不光复习知识，还锻炼口才。曾经有个同事说话又快又急，口头禅也多，比如&quot;对吧、是不是”，别人经常听不清，但是他本人不以为然。领导让他做了几次技术分享，听众的反应可想而知，他才彻底认清缺点。<br>   坚持写技术博客，别在意你写的东西在网上已经重复千百遍。当自己动手的时候，才会意识到眼高手低。让文章读起来流畅清晰，需要呕心沥血的删改。写作是对大脑的长期考验，想不到肯定写不出，想不清楚肯定写不清楚。</p><h3 id="造个轮子" tabindex="-1"><a class="header-anchor" href="#造个轮子" aria-hidden="true">#</a> 造个轮子</h3><p>我们经常说不要重复造轮子。为了开发效率，可以不造轮子，但是必须具备造轮子的能力。建议造一个简单的MQ，你能用到通信协议、设计模式、队列等许多知识。在造轮子的过程中，你会频繁的翻阅各种手册或者博客，这就是<strong>用输出倒逼输入</strong>。</p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/nice-article/BOKEYUANruhegaoxiaodixuexijishu.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 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pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><span class="author-item">deep learning</span></span><span property="author" content="deep learning"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年5月30日</span><meta property="datePublished" content="2022-05-30T05:41:40.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category4" role>优质文章</li><meta property="articleSection" content="优质文章"></ul></span><!----><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 4 分钟</span><meta property="timeRequired" content="PT4M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><p>现在很晚了，但是看到这个问题还是比较有感触的。一年前，我大三上学期，创业失败，想转行做技术。那时候我对Java刚刚了解这几个英语单词。 自己买了本Java从入门到精通。以为可以很快的学完，非CS专业。<br> 现在我想说所有系列的从入门到精通都是垃圾，一年多来，我每天白天看视频，晚上敲代码到凌晨，我是一个很倔的人，我认为天下没有任何东西是人类学不会的，所以我就付出高三一样的时间去学习。最开始学习Java SE，看着控制台打印出第一行Hello world的欣喜，到后面学习打印二维数组算法菱形的恐慌，再到后面学习Java Swing的有趣，再到后面自己开发几款小游戏。<br> 这其中有苦有累，总之就是很孤独，我从学校搬到了外面的小区，每天从事着自己喜欢的事情，一直到2018年1月3号，正式入职。是一个初创公司的后端主要负责人。一共收到4个offer。投了10多家。</p><p><img src="https://pic3.zhimg.com/50/v2-a98b7176502aa77b4b4cdd6f6d0cdc3a_720w.jpg?source=1940ef5c" alt=""></p><p>这是这一年来我看的一些书籍。</p><p><img src="https://pic2.zhimg.com/50/v2-229434bfc073bc81f03a83ef32252e2a_720w.jpg?source=1940ef5c" alt=""></p><p>刚开始的学习十分盲目，不知道如何去学习，看到一个东西觉得有趣就去研究，结果最后没有系统性的学习，还浪费了大量的时间。</p><p><img src="https://pic2.zhimg.com/50/v2-0cc652d7c1ca6aa64a207745b0109007_720w.jpg?source=1940ef5c" alt=""></p><p>现在我觉得如果你要学习Java技术可以先自学一段时间，看自己合不合适，但是一定要坚持，因为既然选择了IT，就要养成终生学习的习惯。下面是我觉得你作为初级Java工程师应该掌握的技术。</p><p>1.Java SE部分 初级语法，面向对象，异常，IO流，多线程，Java Swing，JDBC，泛型，注解，反射等。</p><p>2.数据库部分，基础的sql语句，sql语句调优，索引，数据库引擎，存储过程，触发器，事务等。</p><p>3. 前端部分， HTML5 CSS3 JS(和Java一样复杂，会使用就行)， HTML DOM Jquery BootStrap等。</p><p>4. Java EE部分，Tomcat和Nginx服务器搭建，配置文件，Servlet，JSP，Filter，Listener，http协议，MVC等。</p><p>5. 框架部分，每个框架都可以分开学，在去学如何使用SSM 或者SSH框架，如何搭建，如何整合。开发中为什么会用框架，Rest是啥？Spring为啥经久不衰，底层如何实现等。</p><p>6.23种设计模式，掌握常用的，比如单例模式的多种实现，责任链模式，工厂模式，装饰器模式等，了解常用场景。</p><p>7. 基础算法和数据结构，八大排序算法，查找算法。(面试会问)</p><p>8. (不做硬性要求) 熟练使用maven等构建工具，git等版本控制工具，熟悉常用linux命令，log4j，dubug，junit单元测试，日志打印工具，Redis等NoSql。</p><p>9，也是最重要的一条，对待Java要时刻充满激情！</p><p>太晚了，今晚该休息了，全是手打的。明天在继续码字吧。晚安，希望对你能够有所帮助！</p><hr><p>昨天晚上叫轮子哥帮我点赞,一觉醒来50多个赞了。20多条评论。看来大V还是有用的。</p><p>其实这也是我一直想说的，学习Java以来我就和轮子哥保持着沟通，希望向轮子哥多多学习，现在也算是朋友了。学习的过程也许是痛苦的，但是过程中认识的朋友以及结果都是令人很开心的。</p><p>评论里面有说推荐书籍的。说实话，国内国外的书籍真是一大堆。但是很经典的也就那么一些。大家都知道。</p><hr><p>2018年12月1日，首先谢谢大家的赞。之前自称架构师有点儿吹牛吹大了。现在跳槽到一家中型公司。发现懂得越多越觉得自己无知。在技术这片浩瀚的宇宙里面翱翔，有兴趣会觉得这是一件多多爽的事情。希望大家能够努力学习，然后找到一份自己满意的工作。你我共勉</p><hr><p>2022年我又来更新了，现在入职阿里巴巴了。希望大家加油。</p><p>这里说说我学习Java的使用的几个网站吧:</p><p><a href="https://link.zhihu.com/?target=http%3A//how2j.cn/%3Fp%3D17336" target="_blank" rel="noopener noreferrer">How2J 的 Java教程<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a> （有完整的流程和章节,最主要都是免费的）</p><p><a href="https://link.zhihu.com/?target=https%3A//github.com/" target="_blank" rel="noopener noreferrer">Build software better, together<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>（可以多看看别人的源码）</p><p><a href="https://link.zhihu.com/?target=https%3A//segmentfault.com/" target="_blank" rel="noopener noreferrer">SegmentFault<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>（有任何问题可以去上面提问）</p><p><a href="https://link.zhihu.com/?target=https%3A//stackoverflow.com/" target="_blank" rel="noopener noreferrer">Stack Overflow - Where Developers Learn, Share, &amp; Build Careers<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>（你的很多问题都可以在上面找到答案）</p><p><a href="https://link.zhihu.com/?target=https%3A//www.csdn.net/" target="_blank" rel="noopener noreferrer">CSDN-专业IT技术社区<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>（有很多书籍，软件资源）</p><ul><li>我的个人博客网站</li></ul><p><a href="https://link.zhihu.com/?target=https%3A//www.lanbandeng.com/" target="_blank" rel="noopener noreferrer"><span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/nice-article/ZHIHUjavaxuexidaoshemechengduokeyizhaodiyifengongzuo.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/30 下午1:41:40</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><!----><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 deep learning</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java 学习到什么程度可以找第一份工作？</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><span class="author-item">deep learning</span></span><span property="author" content="deep learning"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年5月30日</span><meta property="datePublished" content="2022-05-30T05:41:40.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category4" role>优质文章</li><meta property="articleSection" content="优质文章"></ul></span><!----><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 4 分钟</span><meta property="timeRequired" content="PT4M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><p>现在很晚了，但是看到这个问题还是比较有感触的。一年前，我大三上学期，创业失败，想转行做技术。那时候我对Java刚刚了解这几个英语单词。 自己买了本Java从入门到精通。以为可以很快的学完，非CS专业。<br> 现在我想说所有系列的从入门到精通都是垃圾，一年多来，我每天白天看视频，晚上敲代码到凌晨，我是一个很倔的人，我认为天下没有任何东西是人类学不会的，所以我就付出高三一样的时间去学习。最开始学习Java SE，看着控制台打印出第一行Hello world的欣喜，到后面学习打印二维数组算法菱形的恐慌，再到后面学习Java Swing的有趣，再到后面自己开发几款小游戏。<br> 这其中有苦有累，总之就是很孤独，我从学校搬到了外面的小区，每天从事着自己喜欢的事情，一直到2018年1月3号，正式入职。是一个初创公司的后端主要负责人。一共收到4个offer。投了10多家。</p><p><img src="https://pic3.zhimg.com/50/v2-a98b7176502aa77b4b4cdd6f6d0cdc3a_720w.jpg?source=1940ef5c" alt=""></p><p>这是这一年来我看的一些书籍。</p><p><img src="https://pic2.zhimg.com/50/v2-229434bfc073bc81f03a83ef32252e2a_720w.jpg?source=1940ef5c" alt=""></p><p>刚开始的学习十分盲目，不知道如何去学习，看到一个东西觉得有趣就去研究，结果最后没有系统性的学习，还浪费了大量的时间。</p><p><img src="https://pic2.zhimg.com/50/v2-0cc652d7c1ca6aa64a207745b0109007_720w.jpg?source=1940ef5c" alt=""></p><p>现在我觉得如果你要学习Java技术可以先自学一段时间，看自己合不合适，但是一定要坚持，因为既然选择了IT，就要养成终生学习的习惯。下面是我觉得你作为初级Java工程师应该掌握的技术。</p><p>1.Java SE部分 初级语法，面向对象，异常，IO流，多线程，Java Swing，JDBC，泛型，注解，反射等。</p><p>2.数据库部分，基础的sql语句，sql语句调优，索引，数据库引擎，存储过程，触发器，事务等。</p><p>3. 前端部分， HTML5 CSS3 JS(和Java一样复杂，会使用就行)， HTML DOM Jquery BootStrap等。</p><p>4. Java EE部分，Tomcat和Nginx服务器搭建，配置文件，Servlet，JSP，Filter，Listener，http协议，MVC等。</p><p>5. 框架部分，每个框架都可以分开学，在去学如何使用SSM 或者SSH框架，如何搭建，如何整合。开发中为什么会用框架，Rest是啥？Spring为啥经久不衰，底层如何实现等。</p><p>6.23种设计模式，掌握常用的，比如单例模式的多种实现，责任链模式，工厂模式，装饰器模式等，了解常用场景。</p><p>7. 基础算法和数据结构，八大排序算法，查找算法。(面试会问)</p><p>8. (不做硬性要求) 熟练使用maven等构建工具，git等版本控制工具，熟悉常用linux命令，log4j，dubug，junit单元测试，日志打印工具，Redis等NoSql。</p><p>9，也是最重要的一条，对待Java要时刻充满激情！</p><p>太晚了，今晚该休息了，全是手打的。明天在继续码字吧。晚安，希望对你能够有所帮助！</p><hr><p>昨天晚上叫轮子哥帮我点赞,一觉醒来50多个赞了。20多条评论。看来大V还是有用的。</p><p>其实这也是我一直想说的，学习Java以来我就和轮子哥保持着沟通，希望向轮子哥多多学习，现在也算是朋友了。学习的过程也许是痛苦的，但是过程中认识的朋友以及结果都是令人很开心的。</p><p>评论里面有说推荐书籍的。说实话，国内国外的书籍真是一大堆。但是很经典的也就那么一些。大家都知道。</p><hr><p>2018年12月1日，首先谢谢大家的赞。之前自称架构师有点儿吹牛吹大了。现在跳槽到一家中型公司。发现懂得越多越觉得自己无知。在技术这片浩瀚的宇宙里面翱翔，有兴趣会觉得这是一件多多爽的事情。希望大家能够努力学习，然后找到一份自己满意的工作。你我共勉</p><hr><p>2022年我又来更新了，现在入职阿里巴巴了。希望大家加油。</p><p>这里说说我学习Java的使用的几个网站吧:</p><p><a href="https://link.zhihu.com/?target=http%3A//how2j.cn/%3Fp%3D17336" target="_blank" rel="noopener noreferrer">How2J 的 Java教程<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a> （有完整的流程和章节,最主要都是免费的）</p><p><a href="https://link.zhihu.com/?target=https%3A//github.com/" target="_blank" rel="noopener noreferrer">Build software better, together<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>（可以多看看别人的源码）</p><p><a href="https://link.zhihu.com/?target=https%3A//segmentfault.com/" target="_blank" rel="noopener noreferrer">SegmentFault<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>（有任何问题可以去上面提问）</p><p><a href="https://link.zhihu.com/?target=https%3A//stackoverflow.com/" target="_blank" rel="noopener noreferrer">Stack Overflow - Where Developers Learn, Share, &amp; Build Careers<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>（你的很多问题都可以在上面找到答案）</p><p><a href="https://link.zhihu.com/?target=https%3A//www.csdn.net/" target="_blank" rel="noopener noreferrer">CSDN-专业IT技术社区<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>（有很多书籍，软件资源）</p><ul><li>我的个人博客网站</li></ul><p><a href="https://link.zhihu.com/?target=https%3A//www.lanbandeng.com/" target="_blank" rel="noopener noreferrer"><span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/nice-article/ZHIHUjavaxuexidaoshemechengduokeyizhaodiyifengongzuo.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/30 下午1:41:40</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><!----><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 deep learning</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年5月31日</span><meta property="datePublished" content="2022-05-31T09:56:13.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 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aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 5 分钟</span><meta property="timeRequired" content="PT5M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/bokeyuan-jianxijavazhongdifangwenquanxiankongzhi.html#_1-修饰类" class="router-link-active router-link-exact-active toc-link level2">1.修饰类</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/bokeyuan-jianxijavazhongdifangwenquanxiankongzhi.html#_2-修饰类的方法和变量" class="router-link-active router-link-exact-active toc-link level2">2.修饰类的方法和变量</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><p>我们先来讨论一下为什么需要访问权限控制。考虑两个场景：</p><p>场景 1：工程师 A 编写了一个类 ClassA，但是工程师 A 并不希望 ClassA 被其他类都访问到，该如何处理呢？</p><p>场景 2：工程师 A 编写了一个类 ClassA，其中有两个方法 fun1、fun2，工程师只想让 fun1 对外可见，也就是说，如果别的工程师来调用 ClassA，只可以调用方法 fun1，该怎么处理呢？</p><p>此时，访问权限控制便可以起到作用了。</p><p>在 Java 中，提供了四种访问权限控制：</p><ul><li>默认访问权限（包访问权限）</li><li>public</li><li>private</li><li>protected</li></ul><p>类只可以用默认访问权限和 public 修饰。比如说：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>public class Wanger{}
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clickable"><!----><span class="title">2.1 Java概述</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.2 Java基础语法</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">2.3 面向对象编程</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/oo/object-class.html" class="nav-link sidebar-link sidebar-page" aria-label="对象和类"><!---->对象和类<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/oo/var.html" class="nav-link sidebar-link sidebar-page" aria-label="变量"><!---->变量<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/oo/method.html" class="nav-link sidebar-link sidebar-page" aria-label="方法"><!---->方法<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/oo/construct.html" class="nav-link sidebar-link sidebar-page" aria-label="构造方法"><!---->构造方法<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/nice-article/bokeyuan-jianxijavazhongdifangwenquanxiankongzhi.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="访问权限控制"><!---->访问权限控制<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/nice-article/bokeyuan-jianxijavazhongdifangwenquanxiankongzhi.html#_1-修饰类" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="1.修饰类"><!---->1.修饰类<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/nice-article/bokeyuan-jianxijavazhongdifangwenquanxiankongzhi.html#_2-修饰类的方法和变量" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="2.修饰类的方法和变量"><!---->2.修饰类的方法和变量<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/oo/code-init.html" class="nav-link sidebar-link sidebar-page" aria-label="代码初始化块"><!---->代码初始化块<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/oo/abstract.html" class="nav-link sidebar-link sidebar-page" aria-label="抽象类"><!---->抽象类<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/oo/interface.html" class="nav-link sidebar-link sidebar-page" aria-label="接口"><!---->接口<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/oo/inner-class.html" class="nav-link sidebar-link sidebar-page" aria-label="内部类"><!---->内部类<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/oo/static.html" class="nav-link sidebar-link sidebar-page" aria-label="static"><!---->static<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/oo/this-super.html" class="nav-link sidebar-link sidebar-page" aria-label="this 和 super"><!---->this 和 super<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/oo/final.html" class="nav-link sidebar-link sidebar-page" aria-label="final"><!---->final<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/oo/instanceof.html" class="nav-link sidebar-link sidebar-page" aria-label="instanceof"><!---->instanceof<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-extra-meal/immutable.html" class="nav-link sidebar-link sidebar-page" aria-label="不可变对象"><!---->不可变对象<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-extra-meal/varables.html" class="nav-link sidebar-link sidebar-page" aria-label="可变参数"><!---->可变参数<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-extra-meal/generic.html" class="nav-link sidebar-link sidebar-page" aria-label="泛型"><!---->泛型<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-extra-meal/annotation.html" class="nav-link sidebar-link sidebar-page" aria-label="注解"><!---->注解<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-extra-meal/enum.html" class="nav-link sidebar-link sidebar-page" aria-label="枚举"><!---->枚举<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-extra-meal/fanshe.html" class="nav-link sidebar-link sidebar-page" aria-label="反射"><!---->反射<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.4 字符串&amp;数组</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.5 集合框架（容器）</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.6 IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.11 并发编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->浅析Java中的访问权限控制</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年5月31日</span><meta property="datePublished" content="2022-05-31T09:56:13.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><meta property="articleSection" content="Java核心"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 5 分钟</span><meta property="timeRequired" content="PT5M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/bokeyuan-jianxijavazhongdifangwenquanxiankongzhi.html#_1-修饰类" class="router-link-active router-link-exact-active toc-link level2">1.修饰类</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/bokeyuan-jianxijavazhongdifangwenquanxiankongzhi.html#_2-修饰类的方法和变量" class="router-link-active router-link-exact-active toc-link level2">2.修饰类的方法和变量</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><p>我们先来讨论一下为什么需要访问权限控制。考虑两个场景：</p><p>场景 1：工程师 A 编写了一个类 ClassA，但是工程师 A 并不希望 ClassA 被其他类都访问到，该如何处理呢？</p><p>场景 2：工程师 A 编写了一个类 ClassA，其中有两个方法 fun1、fun2，工程师只想让 fun1 对外可见，也就是说，如果别的工程师来调用 ClassA，只可以调用方法 fun1，该怎么处理呢？</p><p>此时，访问权限控制便可以起到作用了。</p><p>在 Java 中，提供了四种访问权限控制：</p><ul><li>默认访问权限（包访问权限）</li><li>public</li><li>private</li><li>protected</li></ul><p>类只可以用默认访问权限和 public 修饰。比如说：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>public class Wanger{}
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>或者</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>class Wanger{}
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>但变量和方法则都可以修饰。</p><h2 id="_1-修饰类" tabindex="-1"><a class="header-anchor" href="#_1-修饰类" aria-hidden="true">#</a> 1.修饰类</h2><ul><li>默认访问权限（包访问权限）：用来修饰类的话，表示该类只对同一个包中的其他类可见。</li><li>public：用来修饰类的话，表示该类对其他所有的类都可见。</li></ul><p>例 1：</p><p>Main.java:</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>package com.tobetterjavaer.test1;
 
@@ -177,6 +177,6 @@ public class Man extends People {
     }
 }
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>补充一些关于 Java 包和类文件的知识：</p><p>1）Java 中的包主要是为了防止类文件命名冲突以及方便进行代码组织和管理；</p><p>2）对于一个 Java 源代码文件，如果存在 public 类的话，只能有一个 public 类，且此时源代码文件的名称必须和 public 类的名称完全相同。</p><p>另外，如果还存在其他类，这些类在包外是不可见的。如果源代码文件没有 public 类，则源代码文件的名称可以随意命名。</p><blockquote><p>转载链接：<a href="https://www.cnblogs.com/dolphin0520/p/3734915.html" target="_blank" rel="noopener noreferrer">https://www.cnblogs.com/dolphin0520/p/3734915.html<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a> 原作者: Matrix海子，编辑：沉默王二</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/nice-article/bokeyuan-jianxijavazhongdifangwenquanxiankongzhi.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/31 下午7:11:41</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/oo/construct.html" class="nav-link prev" aria-label="构造方法"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->构造方法</div></a><a href="/oo/code-init.html" class="nav-link next" aria-label="代码初始化块"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">代码初始化块<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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toc-link level3">用起来</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/bokeyuan-ruhegaoxiaodixuexijishu.html#技术分享" class="router-link-active router-link-exact-active toc-link level3">技术分享</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/bokeyuan-ruhegaoxiaodixuexijishu.html#造个轮子" class="router-link-active router-link-exact-active toc-link level3">造个轮子</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><ul><li><a href="#what">学什么</a></li><li><a href="#base">基础与应用</a></li><li><a href="#wide">广度与深度</a></li><li><a href="#philosophy">哲学</a></li><li><a href="#english">英语</a></li><li><a href="#how">怎么学</a></li><li><a href="#system">知识体系</a></li><li><a href="#forget">克服遗忘</a></li><li><a href="#fragment">碎片时间</a></li><li><a href="#use">用起来</a></li><li><a href="#share">技术分享</a></li><li><a href="#wheel">造个轮子</a></li></ul><p>我们相信努力学习一定会有收获，但是方法不当，既让人身心疲惫，也没有切实的回报。高中时代，我的同桌是个漂亮女同学。她的物理成绩很差，虽然她非常勤奋的学习，但成绩总是不理想。为了巩固纯洁的同学关系，我亲密无间地辅导她的物理，发现<strong>她不知道题目考什么</strong>。我们的教科书与试题都围绕着考试大纲展开，看到一道题，应该先想想它在考哪些定理和公式的运用。</p><p>不少朋友每天都阅读技术文章，但是第二天就忘干净了。工作中领导和同事都认可你的沟通和技术能力，但是跳槽面试却屡屡碰壁。面试官问技术方案，明明心里清楚，用嘴说出来却前言不搭后语。面试官再问底层算法，你说看过但是忘记了。他不在乎你看没看过，答不上就是零分。正如男女相亲，男方谈吐潇洒才能吸引姑娘。可是男方紧张了，平时挺能说，关键时候却支支吾吾，姑娘必然认为他不行。人生充满了许多考试，有形的和无形的，每次考试的机会只有一次。</p><p>工作五年十年后，别人成了架构师，自己还在基层打滚，原因是什么？职场上无法成功升迁的原因有很多，没有持续学习、学习效果不好、无法通过心仪公司的的面试，一定是很重要的原因。</p><p><strong>把自己当成一台计算机，既有输入，也要有输出，用输出倒逼输入</strong>。</p><h3 id="学什么" tabindex="-1"><a class="header-anchor" href="#学什么" aria-hidden="true">#</a> 学什么</h3><h4 id="基础与应用" tabindex="-1"><a class="header-anchor" href="#基础与应用" aria-hidden="true">#</a> 基础与应用</h4><p>近些年诞生了许多新技术，比如最时髦的AI(目前还在智障阶段)，数学基础是初中就接触过的概率统计。万丈高楼从地起，不要被新工具或者中间件迷住双眼，一味地追新求快。基础知识是所有技术的基石，在未来很长的时间都不会变化，应该花费足够的时间巩固基础。</p><p>以数据结构和算法为例，大家阅读一下Java的BitSet的源码，里面有大量的移位操作，移位运算掌握的好，看这份源码就没问题。Java同步工具类AQS用到了双向链表，链表知识不过关，肯定搞不懂它的原理。互联网大厂都喜欢考算法，为了通过面试也要精通算法。</p><p>以Java工程师应该掌握的知识为例，按重要程度排出六个梯度：</p><ul><li>第一梯度：计算机组成原理、数据结构和算法、网络通信原理、操作系统原理；</li><li>第二梯度：Java基础、JVM内存模型和GC算法、JVM性能调优、JDK工具、设计模式；</li><li>第三梯度：Spring系列、Mybatis、Dubbo等主流框架的运用和原理；</li><li>第四梯度：MySQL(含SQL编程)、Redis、RabbitMQ/RocketMQ/Kafka、ZooKeeper等数据库或者中间件的运用和原理；</li><li>第五梯度：CAP理论、BASE理论、Paxos和Raft算法等其他分布式理论；</li><li>第六梯度：容器化、大数据、AI、区块链等等前沿技术理论；</li></ul><p>有同学认为第五梯度应该在移到第一梯度。其实很多小公司的日活犹如古天乐一样平平无奇，离大型分布式架构还远得很。学习框架和中间件的时候，顺手掌握分布式理论，效果更好。</p><h4 id="广度与深度" tabindex="-1"><a class="header-anchor" href="#广度与深度" aria-hidden="true">#</a> 广度与深度</h4><p>许多公司的招聘JD没有设定技术人员年龄门槛，但是会加上一句“具备与年龄相当的知识的广度与深度”。多广才算广，多深才算深？这是很主观的话题，这里不展开讨论。</p><p>如何变得更广更深呢？<strong>突破收入上升的瓶颈，发掘自己真正的兴趣</strong>。</p><p>大多数人只是公司的普通职员，收入上升的瓶颈就是升职加薪。许多IT公司会对技术人员有个评级，如果你的评级不高，那就依照晋级章程努力升级。如果你在一个小公司，收入一般，发展前景不明，准备大厂的面试就是最好的学习过程。在这些过程中，你必然学习更多知识，变得更广更深。</p><p>个人兴趣是前进的动力之一，许多知名开源项目都源于作者的兴趣。个人兴趣并不局限技术领域，可以是其他学科。我有个朋友喜欢玩山地自行车，还给一些做自行车话题的自媒体投稿。久而久之，居然能够写一手好文章了，我相信他也能写好技术文档。</p><h4 id="哲学" tabindex="-1"><a class="header-anchor" href="#哲学" aria-hidden="true">#</a> 哲学</h4><p>哲学不是故作高深的学科，它的现实意义就是解决问题。年轻小伙是怎么泡妞的？三天两头花不断，大庭广众跪求爱。这类套路为什么总是能成功呢？礼物满足女人的物欲，当众求爱满足女人的虚荣心，投其所好。食堂大妈打菜的手越来越抖，辣子鸡丁变成辣子辣丁，为什么呢？食堂要控制成本，直接提价会惹众怒。</p><p>科学上的哲学，一般指研究事物发展的规律，归纳终极的解决方案。软件行业充满哲学味道的作品非常多，比如<a href="https://item.jd.com/12401749.html" target="_blank" rel="noopener noreferrer">《人月神话》<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>。举个例子，当软件系统遇到性能问题，尝试下面两种哲学思想提升性能：</p><ul><li>空间换时间：比如引入缓存，消耗额外的存储提高响应速度。</li><li>时间换空间：比如大文件的分片处理，分段处理后再汇总结果。</li></ul><p>设计稳健高可用的系统，尝试从三个方面考虑问题：</p><ul><li>存储：数据会丢失吗，数据一致性怎么解决。</li><li>计算：计算怎么扩容，应用允许任意增加节点吗。</li><li>传输：网络中断或拥塞怎么办。</li></ul><p>从无数的失败或者成功的经验中，总结出高度概括性的方案，让我们下一步做的更好。</p><h4 id="英语" tabindex="-1"><a class="header-anchor" href="#英语" aria-hidden="true">#</a> 英语</h4><p>英语是极为重要的基础，学好英语与掌握编程语言一样重要。且不说外企对英语的要求，许多知名博客就是把英文翻译成中文，充当知识的搬运工。如果英语足够好，直接阅读一手英语资料，避免他人翻译存在的谬误。</p><h3 id="怎么学" tabindex="-1"><a class="header-anchor" href="#怎么学" aria-hidden="true">#</a> 怎么学</h3><h4 id="知识体系" tabindex="-1"><a class="header-anchor" href="#知识体系" aria-hidden="true">#</a> 知识体系</h4><p>体系化的知识比零散的更容易记忆和理解，这正如一部好的电视剧，剧情环环相扣才能吸引观众。建议大家使用思维导图罗列知识点，构建体系结构，如下图所示：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/bokeyuan-ruhegaoxiaodixuexijishu-b27d5dbf-66ca-45fa-b1a4-f0a3ba0a346b.png" alt=""></p><h4 id="克服遗忘" tabindex="-1"><a class="header-anchor" href="#克服遗忘" aria-hidden="true">#</a> 克服遗忘</h4><p>高中是我们知识的巅峰时刻，每周小考每月大考，教辅资料堆成山，地狱式的反复操练强化记忆。复习是对抗遗忘的唯一办法。大脑的遗忘是有规律的，先快后慢。一天后，学到的知识只剩下原来的25%，甚至更低。随着时间的推移，遗忘的速度减慢，遗忘的数量也就减少。</p><table><thead><tr><th>时间间隔</th><th>记忆量</th></tr></thead><tbody><tr><td>刚看完</td><td>100%</td></tr><tr><td>20分钟后</td><td>60%</td></tr><tr><td>1小时后</td><td>40%</td></tr><tr><td>1天后</td><td>30%</td></tr><tr><td>2天后</td><td>27%</td></tr></tbody></table><p>每个人的遗忘程度都不一样，建议第二天复习前一天的内容，七天后复习这段时间的所有内容。</p><h4 id="碎片时间" tabindex="-1"><a class="header-anchor" href="#碎片时间" aria-hidden="true">#</a> 碎片时间</h4><p>不少朋友利用碎片时间学习，比如在公交上看公众号的推送。其实我们都高估了自己的抗干扰能力，如果处在嘈杂的环境，注意力容易被打断，记忆留存度也很低。碎片时间适合学习简单孤立的知识点，比如链表的定义与实现。</p><p>学习复杂的知识，需要大段的连续时间。图书馆是个好地方，安静氛围好。手机放一边，不要理会QQ微信，最好阅读纸质书，泡上一整天。有些城市出现了付费自习室，提供格子间、茶水等等，也是非常好的选择。</p><h3 id="用起来" tabindex="-1"><a class="header-anchor" href="#用起来" aria-hidden="true">#</a> 用起来</h3><h3 id="技术分享" tabindex="-1"><a class="header-anchor" href="#技术分享" aria-hidden="true">#</a> 技术分享</h3><p>从下面这张图我们可以看到，教授他人是知识留存率最高的方式。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/bokeyuan-ruhegaoxiaodixuexijishu-4a0cd5de-99ba-4837-acb5-61969271f8fc.png" alt=""></p><p>准备PPT和演讲内容，给同事来一场技术分享。不光复习知识，还锻炼口才。曾经有个同事说话又快又急，口头禅也多，比如&quot;对吧、是不是”，别人经常听不清，但是他本人不以为然。领导让他做了几次技术分享，听众的反应可想而知，他才彻底认清缺点。</p><p>坚持写技术博客，别在意你写的东西在网上已经重复千百遍。当自己动手的时候，才会意识到眼高手低。让文章读起来流畅清晰，需要呕心沥血的删改。写作是对大脑的长期考验，想不到肯定写不出，想不清楚肯定写不清楚。</p><h3 id="造个轮子" tabindex="-1"><a class="header-anchor" href="#造个轮子" aria-hidden="true">#</a> 造个轮子</h3><p>我们经常说不要重复造轮子。为了开发效率，可以不造轮子，但是必须具备造轮子的能力。建议造一个简单的MQ，你能用到通信协议、设计模式、队列等许多知识。在造轮子的过程中，你会频繁的翻阅各种手册或者博客，这就是<strong>用输出倒逼输入</strong>。</p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/nice-article/bokeyuan-ruhegaoxiaodixuexijishu.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 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class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/bokeyuan-ruhegaoxiaodixuexijishu.html#学什么" class="router-link-active router-link-exact-active toc-link level3">学什么</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/bokeyuan-ruhegaoxiaodixuexijishu.html#怎么学" class="router-link-active router-link-exact-active toc-link level3">怎么学</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/bokeyuan-ruhegaoxiaodixuexijishu.html#用起来" class="router-link-active router-link-exact-active toc-link level3">用起来</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/bokeyuan-ruhegaoxiaodixuexijishu.html#技术分享" class="router-link-active router-link-exact-active toc-link level3">技术分享</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/bokeyuan-ruhegaoxiaodixuexijishu.html#造个轮子" class="router-link-active router-link-exact-active toc-link level3">造个轮子</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><ul><li><a href="#what">学什么</a></li><li><a href="#base">基础与应用</a></li><li><a href="#wide">广度与深度</a></li><li><a href="#philosophy">哲学</a></li><li><a href="#english">英语</a></li><li><a href="#how">怎么学</a></li><li><a href="#system">知识体系</a></li><li><a href="#forget">克服遗忘</a></li><li><a href="#fragment">碎片时间</a></li><li><a href="#use">用起来</a></li><li><a href="#share">技术分享</a></li><li><a href="#wheel">造个轮子</a></li></ul><p>我们相信努力学习一定会有收获，但是方法不当，既让人身心疲惫，也没有切实的回报。高中时代，我的同桌是个漂亮女同学。她的物理成绩很差，虽然她非常勤奋的学习，但成绩总是不理想。为了巩固纯洁的同学关系，我亲密无间地辅导她的物理，发现<strong>她不知道题目考什么</strong>。我们的教科书与试题都围绕着考试大纲展开，看到一道题，应该先想想它在考哪些定理和公式的运用。</p><p>不少朋友每天都阅读技术文章，但是第二天就忘干净了。工作中领导和同事都认可你的沟通和技术能力，但是跳槽面试却屡屡碰壁。面试官问技术方案，明明心里清楚，用嘴说出来却前言不搭后语。面试官再问底层算法，你说看过但是忘记了。他不在乎你看没看过，答不上就是零分。正如男女相亲，男方谈吐潇洒才能吸引姑娘。可是男方紧张了，平时挺能说，关键时候却支支吾吾，姑娘必然认为他不行。人生充满了许多考试，有形的和无形的，每次考试的机会只有一次。</p><p>工作五年十年后，别人成了架构师，自己还在基层打滚，原因是什么？职场上无法成功升迁的原因有很多，没有持续学习、学习效果不好、无法通过心仪公司的的面试，一定是很重要的原因。</p><p><strong>把自己当成一台计算机，既有输入，也要有输出，用输出倒逼输入</strong>。</p><h3 id="学什么" tabindex="-1"><a class="header-anchor" href="#学什么" aria-hidden="true">#</a> 学什么</h3><h4 id="基础与应用" tabindex="-1"><a class="header-anchor" href="#基础与应用" aria-hidden="true">#</a> 基础与应用</h4><p>近些年诞生了许多新技术，比如最时髦的AI(目前还在智障阶段)，数学基础是初中就接触过的概率统计。万丈高楼从地起，不要被新工具或者中间件迷住双眼，一味地追新求快。基础知识是所有技术的基石，在未来很长的时间都不会变化，应该花费足够的时间巩固基础。</p><p>以数据结构和算法为例，大家阅读一下Java的BitSet的源码，里面有大量的移位操作，移位运算掌握的好，看这份源码就没问题。Java同步工具类AQS用到了双向链表，链表知识不过关，肯定搞不懂它的原理。互联网大厂都喜欢考算法，为了通过面试也要精通算法。</p><p>以Java工程师应该掌握的知识为例，按重要程度排出六个梯度：</p><ul><li>第一梯度：计算机组成原理、数据结构和算法、网络通信原理、操作系统原理；</li><li>第二梯度：Java基础、JVM内存模型和GC算法、JVM性能调优、JDK工具、设计模式；</li><li>第三梯度：Spring系列、Mybatis、Dubbo等主流框架的运用和原理；</li><li>第四梯度：MySQL(含SQL编程)、Redis、RabbitMQ/RocketMQ/Kafka、ZooKeeper等数据库或者中间件的运用和原理；</li><li>第五梯度：CAP理论、BASE理论、Paxos和Raft算法等其他分布式理论；</li><li>第六梯度：容器化、大数据、AI、区块链等等前沿技术理论；</li></ul><p>有同学认为第五梯度应该在移到第一梯度。其实很多小公司的日活犹如古天乐一样平平无奇，离大型分布式架构还远得很。学习框架和中间件的时候，顺手掌握分布式理论，效果更好。</p><h4 id="广度与深度" tabindex="-1"><a class="header-anchor" href="#广度与深度" aria-hidden="true">#</a> 广度与深度</h4><p>许多公司的招聘JD没有设定技术人员年龄门槛，但是会加上一句“具备与年龄相当的知识的广度与深度”。多广才算广，多深才算深？这是很主观的话题，这里不展开讨论。</p><p>如何变得更广更深呢？<strong>突破收入上升的瓶颈，发掘自己真正的兴趣</strong>。</p><p>大多数人只是公司的普通职员，收入上升的瓶颈就是升职加薪。许多IT公司会对技术人员有个评级，如果你的评级不高，那就依照晋级章程努力升级。如果你在一个小公司，收入一般，发展前景不明，准备大厂的面试就是最好的学习过程。在这些过程中，你必然学习更多知识，变得更广更深。</p><p>个人兴趣是前进的动力之一，许多知名开源项目都源于作者的兴趣。个人兴趣并不局限技术领域，可以是其他学科。我有个朋友喜欢玩山地自行车，还给一些做自行车话题的自媒体投稿。久而久之，居然能够写一手好文章了，我相信他也能写好技术文档。</p><h4 id="哲学" tabindex="-1"><a class="header-anchor" href="#哲学" aria-hidden="true">#</a> 哲学</h4><p>哲学不是故作高深的学科，它的现实意义就是解决问题。年轻小伙是怎么泡妞的？三天两头花不断，大庭广众跪求爱。这类套路为什么总是能成功呢？礼物满足女人的物欲，当众求爱满足女人的虚荣心，投其所好。食堂大妈打菜的手越来越抖，辣子鸡丁变成辣子辣丁，为什么呢？食堂要控制成本，直接提价会惹众怒。</p><p>科学上的哲学，一般指研究事物发展的规律，归纳终极的解决方案。软件行业充满哲学味道的作品非常多，比如<a href="https://item.jd.com/12401749.html" target="_blank" rel="noopener noreferrer">《人月神话》<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>。举个例子，当软件系统遇到性能问题，尝试下面两种哲学思想提升性能：</p><ul><li>空间换时间：比如引入缓存，消耗额外的存储提高响应速度。</li><li>时间换空间：比如大文件的分片处理，分段处理后再汇总结果。</li></ul><p>设计稳健高可用的系统，尝试从三个方面考虑问题：</p><ul><li>存储：数据会丢失吗，数据一致性怎么解决。</li><li>计算：计算怎么扩容，应用允许任意增加节点吗。</li><li>传输：网络中断或拥塞怎么办。</li></ul><p>从无数的失败或者成功的经验中，总结出高度概括性的方案，让我们下一步做的更好。</p><h4 id="英语" tabindex="-1"><a class="header-anchor" href="#英语" aria-hidden="true">#</a> 英语</h4><p>英语是极为重要的基础，学好英语与掌握编程语言一样重要。且不说外企对英语的要求，许多知名博客就是把英文翻译成中文，充当知识的搬运工。如果英语足够好，直接阅读一手英语资料，避免他人翻译存在的谬误。</p><h3 id="怎么学" tabindex="-1"><a class="header-anchor" href="#怎么学" aria-hidden="true">#</a> 怎么学</h3><h4 id="知识体系" tabindex="-1"><a class="header-anchor" href="#知识体系" aria-hidden="true">#</a> 知识体系</h4><p>体系化的知识比零散的更容易记忆和理解，这正如一部好的电视剧，剧情环环相扣才能吸引观众。建议大家使用思维导图罗列知识点，构建体系结构，如下图所示：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/bokeyuan-ruhegaoxiaodixuexijishu-b27d5dbf-66ca-45fa-b1a4-f0a3ba0a346b.png" alt=""></p><h4 id="克服遗忘" tabindex="-1"><a class="header-anchor" href="#克服遗忘" aria-hidden="true">#</a> 克服遗忘</h4><p>高中是我们知识的巅峰时刻，每周小考每月大考，教辅资料堆成山，地狱式的反复操练强化记忆。复习是对抗遗忘的唯一办法。大脑的遗忘是有规律的，先快后慢。一天后，学到的知识只剩下原来的25%，甚至更低。随着时间的推移，遗忘的速度减慢，遗忘的数量也就减少。</p><table><thead><tr><th>时间间隔</th><th>记忆量</th></tr></thead><tbody><tr><td>刚看完</td><td>100%</td></tr><tr><td>20分钟后</td><td>60%</td></tr><tr><td>1小时后</td><td>40%</td></tr><tr><td>1天后</td><td>30%</td></tr><tr><td>2天后</td><td>27%</td></tr></tbody></table><p>每个人的遗忘程度都不一样，建议第二天复习前一天的内容，七天后复习这段时间的所有内容。</p><h4 id="碎片时间" tabindex="-1"><a class="header-anchor" href="#碎片时间" aria-hidden="true">#</a> 碎片时间</h4><p>不少朋友利用碎片时间学习，比如在公交上看公众号的推送。其实我们都高估了自己的抗干扰能力，如果处在嘈杂的环境，注意力容易被打断，记忆留存度也很低。碎片时间适合学习简单孤立的知识点，比如链表的定义与实现。</p><p>学习复杂的知识，需要大段的连续时间。图书馆是个好地方，安静氛围好。手机放一边，不要理会QQ微信，最好阅读纸质书，泡上一整天。有些城市出现了付费自习室，提供格子间、茶水等等，也是非常好的选择。</p><h3 id="用起来" tabindex="-1"><a class="header-anchor" href="#用起来" aria-hidden="true">#</a> 用起来</h3><h3 id="技术分享" tabindex="-1"><a class="header-anchor" href="#技术分享" aria-hidden="true">#</a> 技术分享</h3><p>从下面这张图我们可以看到，教授他人是知识留存率最高的方式。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/bokeyuan-ruhegaoxiaodixuexijishu-4a0cd5de-99ba-4837-acb5-61969271f8fc.png" alt=""></p><p>准备PPT和演讲内容，给同事来一场技术分享。不光复习知识，还锻炼口才。曾经有个同事说话又快又急，口头禅也多，比如&quot;对吧、是不是”，别人经常听不清，但是他本人不以为然。领导让他做了几次技术分享，听众的反应可想而知，他才彻底认清缺点。</p><p>坚持写技术博客，别在意你写的东西在网上已经重复千百遍。当自己动手的时候，才会意识到眼高手低。让文章读起来流畅清晰，需要呕心沥血的删改。写作是对大脑的长期考验，想不到肯定写不出，想不清楚肯定写不清楚。</p><h3 id="造个轮子" tabindex="-1"><a class="header-anchor" href="#造个轮子" aria-hidden="true">#</a> 造个轮子</h3><p>我们经常说不要重复造轮子。为了开发效率，可以不造轮子，但是必须具备造轮子的能力。建议造一个简单的MQ，你能用到通信协议、设计模式、队列等许多知识。在造轮子的过程中，你会频繁的翻阅各种手册或者博客，这就是<strong>用输出倒逼输入</strong>。</p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/nice-article/bokeyuan-ruhegaoxiaodixuexijishu.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 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pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><span class="author-item">我犟不过你</span></span><span property="author" content="我犟不过你"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年5月29日</span><meta property="datePublished" content="2022-05-29T01:05:54.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 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6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 12 分钟</span><meta property="timeRequired" content="PT12M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/haibukuaiyongmybatisplusshoubashoujiaoni.html#theme-fancy" class="router-link-active router-link-exact-active toc-link level2">theme: fancy</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/haibukuaiyongmybatisplusshoubashoujiaoni.html#_1-1-依赖准备" class="router-link-active router-link-exact-active toc-link level2">1.1 依赖准备</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/haibukuaiyongmybatisplusshoubashoujiaoni.html#_1-2-配置准备" class="router-link-active router-link-exact-active toc-link level2">1.2 配置准备</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/haibukuaiyongmybatisplusshoubashoujiaoni.html#_1-3-启动服务" class="router-link-active router-link-exact-active toc-link level2">1.3 启动服务</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/haibukuaiyongmybatisplusshoubashoujiaoni.html#_2-1-实体类注解" class="router-link-active router-link-exact-active toc-link level2">2.1 实体类注解</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/haibukuaiyongmybatisplusshoubashoujiaoni.html#_2-2-crud" class="router-link-active router-link-exact-active toc-link level2">2.2 CRUD</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/haibukuaiyongmybatisplusshoubashoujiaoni.html#_2-2-1-service层crud" class="router-link-active router-link-exact-active toc-link level3">2.2.1 Service层CRUD</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/haibukuaiyongmybatisplusshoubashoujiaoni.html#_2-2-2-mapper层crud" class="router-link-active router-link-exact-active toc-link level3">2.2.2 Mapper层CRUD</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/haibukuaiyongmybatisplusshoubashoujiaoni.html#_2-3-分页" class="router-link-active router-link-exact-active toc-link level2">2.3 分页</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/haibukuaiyongmybatisplusshoubashoujiaoni.html#_2-4-逻辑删除配置" class="router-link-active router-link-exact-active toc-link level2">2.4 逻辑删除配置</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/haibukuaiyongmybatisplusshoubashoujiaoni.html#_2-5-通用枚举配置" class="router-link-active router-link-exact-active toc-link level2">2.5 通用枚举配置</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/haibukuaiyongmybatisplusshoubashoujiaoni.html#_2-6-自动填充" class="router-link-active router-link-exact-active toc-link level2">2.6 自动填充</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/haibukuaiyongmybatisplusshoubashoujiaoni.html#_2-7-多数据源" class="router-link-active router-link-exact-active toc-link level2">2.7 多数据源</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><hr><h2 id="theme-fancy" tabindex="-1"><a class="header-anchor" href="#theme-fancy" aria-hidden="true">#</a> theme: fancy</h2><p>「这是我参与2022首次更文挑战的第2天，活动详情查看：[2022首次更文挑战](https://juejin.cn/post/7052884569032392740 &quot;https://juejin.cn/post/7052884569032392740&quot;)」</p><p>本文主要介绍mybatis-plus这款插件，针对springboot用户。包括引入，配置，使用，以及扩展等常用的方面做一个汇总整理，尽量包含大家常用的场景内容。</p><blockquote><p>本文项目代码gitee地址: <a href="https://gitee.com/wei_rong_xin/rob-necessities.git" target="_blank" rel="noopener noreferrer">https://gitee.com/wei_rong_xin/rob-necessities.git<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>关于mybatis-plus是什么，不多做介绍了，看官方文档：<a href="https://baomidou.com/" target="_blank" rel="noopener noreferrer">https://baomidou.com/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，咱们直接代码撸起来。</p><h1 id="一、快速开始" tabindex="-1"><a class="header-anchor" href="#一、快速开始" aria-hidden="true">#</a> 一、快速开始</h1><p>本文基于springboot、maven、jdk1.8、mysql开发，所以开始前我们需要准备好这套环境。我的环境使用了nacos作为注册中心，不了解或需要搭建的参考：<a href="https://juejin.cn/post/7053977860612030477" target="_blank" rel="noopener noreferrer">nacos2.0搭建与配置<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><p>新建如下数据库：</p><p><img src="https://p9-juejin.byteimg.com/tos-cn-i-k3u1fbpfcp/6ebfb19ffe4446e3b3c2a2367e334206~tplv-k3u1fbpfcp-watermark.image?" alt="image.png"></p><p>建议大家选择utf8mb4这种字符集，做过微信的同学应该会知道，微信用户名称的表情，是需要这种字符集才能存储的。</p><p>我就默认其他环境已经准备好了，咱们直接从mybatis-plus开始。</p><h2 id="_1-1-依赖准备" tabindex="-1"><a class="header-anchor" href="#_1-1-依赖准备" aria-hidden="true">#</a> 1.1 依赖准备</h2><p>想要什么依赖版本的去maven仓库查看：<a href="https://mvnrepository.com/" target="_blank" rel="noopener noreferrer">maven仓库地址<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><p>引入mybatis-plus依赖：</p><div class="language-xml ext-xml line-numbers-mode"><pre class="language-xml"><code><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>dependency</span><span class="token punctuation">&gt;</span></span>
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class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/haibukuaiyongmybatisplusshoubashoujiaoni.html#theme-fancy" class="router-link-active router-link-exact-active toc-link level2">theme: fancy</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/haibukuaiyongmybatisplusshoubashoujiaoni.html#_1-1-依赖准备" class="router-link-active router-link-exact-active toc-link level2">1.1 依赖准备</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/haibukuaiyongmybatisplusshoubashoujiaoni.html#_1-2-配置准备" class="router-link-active router-link-exact-active toc-link level2">1.2 配置准备</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/haibukuaiyongmybatisplusshoubashoujiaoni.html#_1-3-启动服务" class="router-link-active router-link-exact-active toc-link level2">1.3 启动服务</a></li><!----><!--]--><!--[--><li class="toc-item"><a 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class="router-link-active router-link-exact-active toc-link level2">2.7 多数据源</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><hr><h2 id="theme-fancy" tabindex="-1"><a class="header-anchor" href="#theme-fancy" aria-hidden="true">#</a> theme: fancy</h2><p>「这是我参与2022首次更文挑战的第2天，活动详情查看：[2022首次更文挑战](https://juejin.cn/post/7052884569032392740 &quot;https://juejin.cn/post/7052884569032392740&quot;)」</p><p>本文主要介绍mybatis-plus这款插件，针对springboot用户。包括引入，配置，使用，以及扩展等常用的方面做一个汇总整理，尽量包含大家常用的场景内容。</p><blockquote><p>本文项目代码gitee地址: <a href="https://gitee.com/wei_rong_xin/rob-necessities.git" target="_blank" rel="noopener noreferrer">https://gitee.com/wei_rong_xin/rob-necessities.git<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>关于mybatis-plus是什么，不多做介绍了，看官方文档：<a href="https://baomidou.com/" target="_blank" rel="noopener noreferrer">https://baomidou.com/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，咱们直接代码撸起来。</p><h1 id="一、快速开始" tabindex="-1"><a class="header-anchor" href="#一、快速开始" aria-hidden="true">#</a> 一、快速开始</h1><p>本文基于springboot、maven、jdk1.8、mysql开发，所以开始前我们需要准备好这套环境。我的环境使用了nacos作为注册中心，不了解或需要搭建的参考：<a href="https://juejin.cn/post/7053977860612030477" target="_blank" rel="noopener noreferrer">nacos2.0搭建与配置<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><p>新建如下数据库：</p><p><img src="https://p9-juejin.byteimg.com/tos-cn-i-k3u1fbpfcp/6ebfb19ffe4446e3b3c2a2367e334206~tplv-k3u1fbpfcp-watermark.image?" alt="image.png"></p><p>建议大家选择utf8mb4这种字符集，做过微信的同学应该会知道，微信用户名称的表情，是需要这种字符集才能存储的。</p><p>我就默认其他环境已经准备好了，咱们直接从mybatis-plus开始。</p><h2 id="_1-1-依赖准备" tabindex="-1"><a class="header-anchor" href="#_1-1-依赖准备" aria-hidden="true">#</a> 1.1 依赖准备</h2><p>想要什么依赖版本的去maven仓库查看：<a href="https://mvnrepository.com/" target="_blank" rel="noopener noreferrer">maven仓库地址<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><p>引入mybatis-plus依赖：</p><div class="language-xml ext-xml line-numbers-mode"><pre class="language-xml"><code><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>dependency</span><span class="token punctuation">&gt;</span></span>
     <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>groupId</span><span class="token punctuation">&gt;</span></span>com.baomidou<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>groupId</span><span class="token punctuation">&gt;</span></span>
     <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>artifactId</span><span class="token punctuation">&gt;</span></span>mybatis-plus-boot-starter<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>artifactId</span><span class="token punctuation">&gt;</span></span>
     <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>version</span><span class="token punctuation">&gt;</span></span>3.5.0<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>version</span><span class="token punctuation">&gt;</span></span>
@@ -534,6 +534,6 @@
 
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>记过上面的接口验证，功能没有问题，集成成功。</p><blockquote><p>上文基本覆盖了mybatis-plus常用的特性，有同学说自动代码生成没说？后面会有专门的章节去讲解<code> mybatis-plus-generator</code> + <code>velocity</code>整合的文章，从后台代码，到前端代码全部一键生成。</p></blockquote><blockquote><p>本文项目代码gitee地址: <a href="https://gitee.com/wei_rong_xin/rob-necessities.git" target="_blank" rel="noopener noreferrer">https://gitee.com/wei_rong_xin/rob-necessities.git<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><img src="https://p1-juejin.byteimg.com/tos-cn-i-k3u1fbpfcp/2196a876b9554168ae9586ebf6f50b6e~tplv-k3u1fbpfcp-watermark.image?" alt="image.png"></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/nice-article/haibukuaiyongmybatisplusshoubashoujiaoni.md" 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diff --git a/dist/nice-article/javaxuexidaoshemechengduokeyizhaodiyifengongzuo.html b/dist/nice-article/javaxuexidaoshemechengduokeyizhaodiyifengongzuo.html
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pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><span class="author-item">deep learning</span></span><span property="author" content="deep learning"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年5月30日</span><meta property="datePublished" content="2022-05-30T13:19:41.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 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class="category category4" role>优质文章</li><meta property="articleSection" content="优质文章"></ul></span><!----><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 4 分钟</span><meta property="timeRequired" content="PT4M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><p>现在很晚了，但是看到这个问题还是比较有感触的。一年前，我大三上学期，创业失败，想转行做技术。那时候我对Java刚刚了解这几个英语单词。 自己买了本Java从入门到精通。以为可以很快的学完，非CS专业。<br> 现在我想说所有系列的从入门到精通都是垃圾，一年多来，我每天白天看视频，晚上敲代码到凌晨，我是一个很倔的人，我认为天下没有任何东西是人类学不会的，所以我就付出高三一样的时间去学习。最开始学习Java SE，看着控制台打印出第一行Hello world的欣喜，到后面学习打印二维数组算法菱形的恐慌，再到后面学习Java Swing的有趣，再到后面自己开发几款小游戏。<br> 这其中有苦有累，总之就是很孤独，我从学校搬到了外面的小区，每天从事着自己喜欢的事情，一直到2018年1月3号，正式入职。是一个初创公司的后端主要负责人。一共收到4个offer。投了10多家。</p><p><img src="https://pic1.zhimg.com/50/v2-a98b7176502aa77b4b4cdd6f6d0cdc3a_720w.jpg?source=1940ef5c" alt=""></p><p>![](data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="1536" height="2048"></svg>)</p><p>这是这一年来我看的一些书籍。</p><p><img src="https://pic1.zhimg.com/50/v2-229434bfc073bc81f03a83ef32252e2a_720w.jpg?source=1940ef5c" alt=""></p><p>![](data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="719" height="960"></svg>)</p><p>刚开始的学习十分盲目，不知道如何去学习，看到一个东西觉得有趣就去研究，结果最后没有系统性的学习，还浪费了大量的时间。</p><p><img src="https://pica.zhimg.com/50/v2-0cc652d7c1ca6aa64a207745b0109007_720w.jpg?source=1940ef5c" alt=""></p><p>![](data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="720" height="1314"></svg>)</p><p>现在我觉得如果你要学习Java技术可以先自学一段时间，看自己合不合适，但是一定要坚持，因为既然选择了IT，就要养成终生学习的习惯。下面是我觉得你作为初级Java工程师应该掌握的技术。</p><p>1.Java SE部分 初级语法，面向对象，异常，IO流，多线程，Java Swing，JDBC，泛型，注解，反射等。</p><p>2.数据库部分，基础的sql语句，sql语句调优，索引，数据库引擎，存储过程，触发器，事务等。</p><p>3. 前端部分， HTML5 CSS3 JS(和Java一样复杂，会使用就行)， HTML DOM Jquery BootStrap等。</p><p>4. Java EE部分，Tomcat和Nginx服务器搭建，配置文件，Servlet，JSP，Filter，Listener，http协议，MVC等。</p><p>5. 框架部分，每个框架都可以分开学，在去学如何使用SSM 或者SSH框架，如何搭建，如何整合。开发中为什么会用框架，Rest是啥？Spring为啥经久不衰，底层如何实现等。</p><p>6.23种设计模式，掌握常用的，比如单例模式的多种实现，责任链模式，工厂模式，装饰器模式等，了解常用场景。</p><p>7. 基础算法和数据结构，八大排序算法，查找算法。(面试会问)</p><p>8. (不做硬性要求) 熟练使用maven等构建工具，git等版本控制工具，熟悉常用linux命令，log4j，dubug，junit单元测试，日志打印工具，Redis等NoSql。</p><p>9，也是最重要的一条，对待Java要时刻充满激情！</p><p>太晚了，今晚该休息了，全是手打的。明天在继续码字吧。晚安，希望对你能够有所帮助！</p><hr><p>昨天晚上叫轮子哥帮我点赞,一觉醒来50多个赞了。20多条评论。看来大V还是有用的。</p><p>其实这也是我一直想说的，学习Java以来我就和轮子哥保持着沟通，希望向轮子哥多多学习，现在也算是朋友了。学习的过程也许是痛苦的，但是过程中认识的朋友以及结果都是令人很开心的。</p><p>评论里面有说推荐书籍的。说实话，国内国外的书籍真是一大堆。但是很经典的也就那么一些。大家都知道。</p><hr><p>2018年12月1日，首先谢谢大家的赞。之前自称架构师有点儿吹牛吹大了。现在跳槽到一家中型公司。发现懂得越多越觉得自己无知。在技术这片浩瀚的宇宙里面翱翔，有兴趣会觉得这是一件多多爽的事情。希望大家能够努力学习，然后找到一份自己满意的工作。你我共勉</p><hr><p>2022年我又来更新了，现在入职阿里巴巴了。希望大家加油。</p><p>这里说说我学习Java的使用的几个网站吧:</p><p><a href="https://link.zhihu.com/?target=http%3A//how2j.cn/%3Fp%3D17336" target="_blank" rel="noopener noreferrer">How2J 的 Java教程<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a> （有完整的流程和章节,最主要都是免费的）</p><p><a href="https://link.zhihu.com/?target=https%3A//github.com/" target="_blank" rel="noopener noreferrer">Build software better, together<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>（可以多看看别人的源码）</p><p><a href="https://link.zhihu.com/?target=https%3A//segmentfault.com/" target="_blank" rel="noopener noreferrer">SegmentFault<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>（有任何问题可以去上面提问）</p><p><a href="https://link.zhihu.com/?target=https%3A//stackoverflow.com/" target="_blank" rel="noopener noreferrer">Stack Overflow - Where Developers Learn, Share, &amp; Build Careers<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>（你的很多问题都可以在上面找到答案）</p><p><a href="https://link.zhihu.com/?target=https%3A//www.csdn.net/" target="_blank" rel="noopener noreferrer">CSDN-专业IT技术社区<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>（有很多书籍，软件资源）</p><ul><li>我的个人博客网站</li></ul><p><a href="https://link.zhihu.com/?target=https%3A//www.lanbandeng.com/" target="_blank" rel="noopener noreferrer"><span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/nice-article/javaxuexidaoshemechengduokeyizhaodiyifengongzuo.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/30 下午9:19:41</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span><!--]--><!--]--></div></footer><!----><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 deep learning</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java 学习到什么程度可以找第一份工作？</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><span class="author-item">deep learning</span></span><span property="author" content="deep learning"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年5月30日</span><meta property="datePublished" content="2022-05-30T13:19:41.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category4" role>优质文章</li><meta property="articleSection" content="优质文章"></ul></span><!----><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 4 分钟</span><meta property="timeRequired" content="PT4M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><p>现在很晚了，但是看到这个问题还是比较有感触的。一年前，我大三上学期，创业失败，想转行做技术。那时候我对Java刚刚了解这几个英语单词。 自己买了本Java从入门到精通。以为可以很快的学完，非CS专业。<br> 现在我想说所有系列的从入门到精通都是垃圾，一年多来，我每天白天看视频，晚上敲代码到凌晨，我是一个很倔的人，我认为天下没有任何东西是人类学不会的，所以我就付出高三一样的时间去学习。最开始学习Java SE，看着控制台打印出第一行Hello world的欣喜，到后面学习打印二维数组算法菱形的恐慌，再到后面学习Java Swing的有趣，再到后面自己开发几款小游戏。<br> 这其中有苦有累，总之就是很孤独，我从学校搬到了外面的小区，每天从事着自己喜欢的事情，一直到2018年1月3号，正式入职。是一个初创公司的后端主要负责人。一共收到4个offer。投了10多家。</p><p><img src="https://pic1.zhimg.com/50/v2-a98b7176502aa77b4b4cdd6f6d0cdc3a_720w.jpg?source=1940ef5c" alt=""></p><p>![](data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="1536" height="2048"></svg>)</p><p>这是这一年来我看的一些书籍。</p><p><img src="https://pic1.zhimg.com/50/v2-229434bfc073bc81f03a83ef32252e2a_720w.jpg?source=1940ef5c" alt=""></p><p>![](data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="719" height="960"></svg>)</p><p>刚开始的学习十分盲目，不知道如何去学习，看到一个东西觉得有趣就去研究，结果最后没有系统性的学习，还浪费了大量的时间。</p><p><img src="https://pica.zhimg.com/50/v2-0cc652d7c1ca6aa64a207745b0109007_720w.jpg?source=1940ef5c" alt=""></p><p>![](data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="720" height="1314"></svg>)</p><p>现在我觉得如果你要学习Java技术可以先自学一段时间，看自己合不合适，但是一定要坚持，因为既然选择了IT，就要养成终生学习的习惯。下面是我觉得你作为初级Java工程师应该掌握的技术。</p><p>1.Java SE部分 初级语法，面向对象，异常，IO流，多线程，Java Swing，JDBC，泛型，注解，反射等。</p><p>2.数据库部分，基础的sql语句，sql语句调优，索引，数据库引擎，存储过程，触发器，事务等。</p><p>3. 前端部分， HTML5 CSS3 JS(和Java一样复杂，会使用就行)， HTML DOM Jquery BootStrap等。</p><p>4. Java EE部分，Tomcat和Nginx服务器搭建，配置文件，Servlet，JSP，Filter，Listener，http协议，MVC等。</p><p>5. 框架部分，每个框架都可以分开学，在去学如何使用SSM 或者SSH框架，如何搭建，如何整合。开发中为什么会用框架，Rest是啥？Spring为啥经久不衰，底层如何实现等。</p><p>6.23种设计模式，掌握常用的，比如单例模式的多种实现，责任链模式，工厂模式，装饰器模式等，了解常用场景。</p><p>7. 基础算法和数据结构，八大排序算法，查找算法。(面试会问)</p><p>8. (不做硬性要求) 熟练使用maven等构建工具，git等版本控制工具，熟悉常用linux命令，log4j，dubug，junit单元测试，日志打印工具，Redis等NoSql。</p><p>9，也是最重要的一条，对待Java要时刻充满激情！</p><p>太晚了，今晚该休息了，全是手打的。明天在继续码字吧。晚安，希望对你能够有所帮助！</p><hr><p>昨天晚上叫轮子哥帮我点赞,一觉醒来50多个赞了。20多条评论。看来大V还是有用的。</p><p>其实这也是我一直想说的，学习Java以来我就和轮子哥保持着沟通，希望向轮子哥多多学习，现在也算是朋友了。学习的过程也许是痛苦的，但是过程中认识的朋友以及结果都是令人很开心的。</p><p>评论里面有说推荐书籍的。说实话，国内国外的书籍真是一大堆。但是很经典的也就那么一些。大家都知道。</p><hr><p>2018年12月1日，首先谢谢大家的赞。之前自称架构师有点儿吹牛吹大了。现在跳槽到一家中型公司。发现懂得越多越觉得自己无知。在技术这片浩瀚的宇宙里面翱翔，有兴趣会觉得这是一件多多爽的事情。希望大家能够努力学习，然后找到一份自己满意的工作。你我共勉</p><hr><p>2022年我又来更新了，现在入职阿里巴巴了。希望大家加油。</p><p>这里说说我学习Java的使用的几个网站吧:</p><p><a href="https://link.zhihu.com/?target=http%3A//how2j.cn/%3Fp%3D17336" target="_blank" rel="noopener noreferrer">How2J 的 Java教程<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a> （有完整的流程和章节,最主要都是免费的）</p><p><a href="https://link.zhihu.com/?target=https%3A//github.com/" target="_blank" rel="noopener noreferrer">Build software better, together<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>（可以多看看别人的源码）</p><p><a href="https://link.zhihu.com/?target=https%3A//segmentfault.com/" target="_blank" rel="noopener noreferrer">SegmentFault<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>（有任何问题可以去上面提问）</p><p><a href="https://link.zhihu.com/?target=https%3A//stackoverflow.com/" target="_blank" rel="noopener noreferrer">Stack Overflow - Where Developers Learn, Share, &amp; Build Careers<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>（你的很多问题都可以在上面找到答案）</p><p><a href="https://link.zhihu.com/?target=https%3A//www.csdn.net/" target="_blank" rel="noopener noreferrer">CSDN-专业IT技术社区<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>（有很多书籍，软件资源）</p><ul><li>我的个人博客网站</li></ul><p><a href="https://link.zhihu.com/?target=https%3A//www.lanbandeng.com/" target="_blank" rel="noopener noreferrer"><span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/nice-article/javaxuexidaoshemechengduokeyizhaodiyifengongzuo.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/30 下午9:19:41</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span><!--]--><!--]--></div></footer><!----><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 deep learning</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><span class="author-item">JAVA日知录</span></span><span property="author" content="JAVA日知录"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年5月29日</span><meta property="datePublished" content="2022-05-29T01:05:54.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category 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6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 13 分钟</span><meta property="timeRequired" content="PT13M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/jiagoushizenyanghuizhijitongjiagoulantu.html#前言" class="router-link-active router-link-exact-active toc-link level2">前言</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/jiagoushizenyanghuizhijitongjiagoulantu.html#软件建模" class="router-link-active router-link-exact-active toc-link level2">软件建模</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/jiagoushizenyanghuizhijitongjiagoulantu.html#软件设计方法" class="router-link-active router-link-exact-active toc-link level2">软件设计方法</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/jiagoushizenyanghuizhijitongjiagoulantu.html#类图" class="router-link-active router-link-exact-active toc-link level3">类图</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/jiagoushizenyanghuizhijitongjiagoulantu.html#时序图" class="router-link-active router-link-exact-active toc-link level3">时序图</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/jiagoushizenyanghuizhijitongjiagoulantu.html#组件图" class="router-link-active router-link-exact-active toc-link level3">组件图</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/jiagoushizenyanghuizhijitongjiagoulantu.html#部署图" class="router-link-active router-link-exact-active toc-link level3">部署图</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/jiagoushizenyanghuizhijitongjiagoulantu.html#用例图" class="router-link-active router-link-exact-active toc-link level3">用例图</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/jiagoushizenyanghuizhijitongjiagoulantu.html#状态图" class="router-link-active router-link-exact-active toc-link level3">状态图</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/jiagoushizenyanghuizhijitongjiagoulantu.html#活动图" class="router-link-active router-link-exact-active toc-link level3">活动图</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/jiagoushizenyanghuizhijitongjiagoulantu.html#软件文档设计" class="router-link-active router-link-exact-active toc-link level2">软件文档设计</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/jiagoushizenyanghuizhijitongjiagoulantu.html#小结" class="router-link-active router-link-exact-active toc-link level2">小结</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/jiagoushizenyanghuizhijitongjiagoulantu.html#最后说一句-别白嫖-求关注" class="router-link-active router-link-exact-active toc-link level2">最后说一句（别白嫖，求关注）</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h2 id="前言" tabindex="-1"><a class="header-anchor" href="#前言" aria-hidden="true">#</a> 前言</h2><p>大家好，我是飘渺。</p><p>今天我们来了解一些关于软件设计文档的基础知识，这样你在学习后面的具体案例时，就能更加清楚地理解文档是基于什么方式来组织的了。</p><p>首先，请你设想这样一个场景：如果公司安排你做架构师，要你在项目开发前期进行软件架构设计，你该如何开展你的工作？如何输出你的工作成果？如何确定你的设计是否满足用户需求？你是否有把握最后交付的软件是满足要求的？是否有把握让团队每个工程师清楚自己的职责范围并有效地完成开发工作……</p><p>这些问题其实都是软件开发管理与技术架构的核心诉求，而架构师的核心工作就是做好软件设计，解决这些诉求。这些问题搞定了，软件的开发过程和结果也就都得到了保证。那怎么实现这些诉求呢？我们主要的手段就是软件建模，以及将这些软件模型组织成一篇有价值的软件设计文档。</p><h2 id="软件建模" tabindex="-1"><a class="header-anchor" href="#软件建模" aria-hidden="true">#</a> 软件建模</h2><p>所谓软件建模，就是为要开发的软件建造模型。</p><p>模型是对客观存在的抽象，例如著名的物理学公式 E=mc2，就是质量能量转换的物理规律的数学模型。除了物理学公式以外，还有一些东西也是模型，比如地图是对地理空间的建模；机械装置、电子电路、建筑设计的各种图纸是对物理实体的建模。而软件，也可以通过各种图进行建模。</p><p>软件系统庞大复杂，通过软件建模，我们可以抽象软件系统的主要特征和组成部分，梳理这些关键组成部分的关系。在软件开发过程中依照模型的约束开发，系统整体的格局和关系就会可控。相关人员从始至终都能清晰了解软件的蓝图和当前的进展，不同的开发工程师会清晰自己开发的模块和其他同事工作内容的关系与依赖，并按照这些模型开发代码。</p><p>那么我们是根据什么进行软件建模的呢？要解答这个疑问，你需要先知道，在软件开发中，有两个客观存在。</p><p>一个是我们要解决的领域问题。比如我们要开发一个电子商务网站，那么客观的领域问题就是如何做生意，卖家如何管理商品、管理订单、服务用户，买家如何挑选商品，如何下订单，如何支付等等。对这些客观领域问题的抽象就是各种功能及其关系、各种模型对象及其关系、各种业务处理流程。</p><p>另一个客观存在就是最终开发出来的软件系统。软件系统要解决的问题包括软件由哪些主要类组成，这些类如何组织构成一个个的组件，这些类和组件之间的依赖关系如何，运行期如何调用，需要部署多少台服务器，服务器之间如何通信等。</p><p>而对这两个客观存在进行抽象化处理的手段，就是我们的软件模型。</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PxMzT0Oibf4ia9Fva7RU38ovpD2mCYXIm1UVdmia0792Oeicm4HEfvaHPvbfyWgbmP8fzxf36tnKWLKwaeiaCmBwCBg/640?wx_fmt=png" alt=""></p><p>一方面我们要对领域问题和要设计的软件系统进行分析、设计、抽象，另一方面，我们根据抽象出来的模型进行开发，最终实现出一个软件系统，这就是软件开发的主要过程。而对领域问题和软件系统进行分析、设计和抽象的这个过程，就是软件建模设计。</p><h2 id="软件设计方法" tabindex="-1"><a class="header-anchor" href="#软件设计方法" aria-hidden="true">#</a> 软件设计方法</h2><p>因此，软件设计其实就是软件建模的过程。我们通过软件建模工具，将软件模型画出来，实现软件设计。</p><p>在实践中，通常用来进行软件建模画图的工具是 UML，统一建模语言。UML 包含的软件模型有 10 种，其中常用的有 7 种：类图、序列图、组件图、部署图、用例图、状态图和活动图。</p><p>下面我们简单了解下这 7 种常用 UML 图的使用场景和基本样例。在专栏后面的设计文档中，你会多次见到它们，看多了，你就懂了，也就自然会画了。当然，如果你想更详细地学习 UML 知识，我也非常鼓励，并且推荐你阅读马丁富勒的《UML 精粹》一书。</p><h3 id="类图" tabindex="-1"><a class="header-anchor" href="#类图" aria-hidden="true">#</a> 类图</h3><p>类图是最常见的 UML 图形，用来描述类的特性和类之间的静态关系。</p><p>一个类包含三个部分：类的名字、类的属性列表和类的方法列表。类之间有 6 种静态关系：关联、依赖、组合、聚合、继承、泛化。把相关的一组类及其关系用一张图画出来，就是类图。</p><p>比如你在后面的课程中会遇到下面这幅图，它就是类图。你可以把我上面说的类图包含元素和图片一一对照，感受类图的用法。</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PxMzT0Oibf4ia9Fva7RU38ovpD2mCYXIm1AUopK9QQDr6pV5WBp5Nkp4JQRrZKBY4PkicgCj6kg4feC1wcW6U5mQw/640?wx_fmt=png" alt=""></p><h3 id="时序图" tabindex="-1"><a class="header-anchor" href="#时序图" aria-hidden="true">#</a> 时序图</h3><p>类图之外，另一种常用的图是时序图，类图描述类之间的静态关系，时序图则用来描述参与者之间的动态调用关系。</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PxMzT0Oibf4ia9Fva7RU38ovpD2mCYXIm1EcAr3PticUpWHHw7DAczyFaHZVu2UXy8XQ3haOgqqzgYPXFDvfGMahA/640?wx_fmt=png" alt=""></p><h3 id="组件图" tabindex="-1"><a class="header-anchor" href="#组件图" aria-hidden="true">#</a> 组件图</h3><p>组件是比类粒度更大的设计元素，一个组件中通常包含很多个类。组件图有的时候和包图的用途比较接近，组件图通常用来描述物理上的组件，比如一个 JAR、一个 DLL 等等。在实践中，我们进行模块设计的时候，用得更多的就是组件图。</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PxMzT0Oibf4ia9Fva7RU38ovpD2mCYXIm1ge6DR9VNudpF79ic5ACNSaWfbc3MeL53PyYuxIwvibPoGicpibQsOXFZibQ/640?wx_fmt=png" alt=""></p><p>组件图描述组件之间的静态关系，主要是依赖关系，如果你想要描述组件之间的动态调用关系，可以使用组件时序图，以组件作为参与者，描述组件之间的消息调用关系。</p><h3 id="部署图" tabindex="-1"><a class="header-anchor" href="#部署图" aria-hidden="true">#</a> 部署图</h3><p>部署图描述软件系统的最终部署情况，比如需要部署多少服务器，关键组件都部署在哪些服务器上。</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PxMzT0Oibf4ia9Fva7RU38ovpD2mCYXIm1Nj686l5iat4aaxb22dzibKUNNdn4fncgRnIjgicia3klrFmJUb4mh2yY2A/640?wx_fmt=png" alt=""></p><p>部署图是软件系统最终物理呈现的蓝图，根据部署图，所有相关者，诸如客户、老板、工程师都能清晰地了解到最终运行的系统在物理上是什么样子，和现有的系统服务器的关系，和第三方服务器的关系。根据部署图，还可以估算服务器和第三方软件的采购成本。</p><p>因此部署图是整个软件设计模型中，比较宏观的一种图，是在设计早期就需要画的一种模型图。根据部署图，各方可以讨论对这个方案是否认可。只有对部署图达成共识，才能继续后面的细节设计。</p><h3 id="用例图" tabindex="-1"><a class="header-anchor" href="#用例图" aria-hidden="true">#</a> 用例图</h3><p>用例图通过反映用户和软件系统的交互，描述系统的功能需求。</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PxMzT0Oibf4ia9Fva7RU38ovpD2mCYXIm1cDQtmQibY0JasQqXzmH79ib1pj4WziajST03YL4yiaibKicVwy0ooono02lw/640?wx_fmt=png" alt=""></p><p>图中小人形象的元素，被称为角色，角色可以是人，也可以是其他的系统。系统的功能可能会很复杂，所以一张用例图可能只包含其中一小部分功能，这些功能被一个矩形框框起来，这个矩形框被称为用例的边界。框里的椭圆表示一个一个的功能，功能之间可以调用依赖，也可以进行功能扩展。</p><h3 id="状态图" tabindex="-1"><a class="header-anchor" href="#状态图" aria-hidden="true">#</a> 状态图</h3><p>状态图用来展示单个对象生命周期的状态变迁。</p><p>业务系统中，很多重要的领域对象都有比较复杂的状态变迁，比如账号，有创建状态、激活状态、冻结状态、欠费状态等等各种状态。此外，用户、订单、商品、红包这些常见的领域模型都有多种状态。</p><p>这些状态的变迁描述可以在用例图中用文字描述，随着角色的各种操作而改变，但是用这种方式描述，状态散乱在各处，不要说开发的时候容易搞错，就是产品经理自己在设计的时候，也容易搞错对象的状态变迁。</p><p>UML 的状态图可以很好地解决这一问题，一张状态图描述一个对象生命周期的各种状态，及其变迁的关系。如图所示，门的状态有开 Opened、关 Closed 和锁 Locked 三种，状态与变迁关系用一张状态图就可以搞定。</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PxMzT0Oibf4ia9Fva7RU38ovpD2mCYXIm19rM7gVEzyufk01L7xM6eKPybnYcUIEp1ndQg5GKB0GboU0iaVefb5Mg/640?wx_fmt=png" alt=""></p><h3 id="活动图" tabindex="-1"><a class="header-anchor" href="#活动图" aria-hidden="true">#</a> 活动图</h3><p>活动图主要用来描述过程逻辑和业务流程。UML 中没有流程图，很多时候，人们用活动图代替流程图。</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PxMzT0Oibf4ia9Fva7RU38ovpD2mCYXIm1QdyA2cGvyDJwEAMIQicx3aS4zGafmtBFz9b7hgU6DYjj4FBUwQvxYWA/640?wx_fmt=png" alt=""></p><p>活动图和早期流程图的图形元素也很接近，实心圆代表流程开始，空心圆代表流程结束，圆角矩形表示活动，菱形表示分支判断。</p><p>此外，活动图引入了一个重要的概念——泳道。活动图可以根据活动的范围，将活动根据领域、系统和角色等划分到不同的泳道中，使流程边界更加清晰。</p><p>我们上面介绍了 UML 建模常用的 7 种模型，那么这 7 种模型分别应用在软件设计的什么阶段？用来表达什么样的设计意图呢？</p><h2 id="软件文档设计" tabindex="-1"><a class="header-anchor" href="#软件文档设计" aria-hidden="true">#</a> 软件文档设计</h2><p>软件设计文档就是架构师的主要工作成果，它需要阐释本文开头提到的各种诉求，描绘软件的完整蓝图，而软件设计文档的主要组成部分就是软件模型。</p><p>软件设计过程可以拆分成需求分析、概要设计和详细设计三个阶段。</p><p>在需求分析阶段，主要是通过用例图来描述系统的功能与使用场景；对于关键的业务流程，可以通过活动图描述；如果在需求阶段就提出要和现有的某些子系统整合，那么可以通过时序图描述新系统和原来的子系统的调用关系；可以通过简化的类图进行领域模型抽象，并描述核心领域对象之间的关系；如果某些对象内部会有复杂的状态变化，比如用户、订单这些，可以用状态图进行描述。</p><p>在概要设计阶段，通过部署图描述系统最终的物理蓝图；通过组件图以及组件时序图设计软件主要模块及其关系；还可以通过组件活动图描述组件间的流程逻辑。</p><p>在详细设计阶段，主要输出的就是类图和类的时序图，指导最终的代码开发，如果某个类方法内部有比较复杂的逻辑，那么可以将这个方法的逻辑用活动图进行描述。</p><p>我们在每个设计阶段使用几种 UML 模型对领域或者系统进行建模，然后将这些模型配上必要的文字说明写入到文档中，就可以构成一篇软件设计文档了。</p><p>我们专栏中的十几讲软件设计案例，都是按照这样的方式组织的，你可以在学习的过程中，一方面了解各种系统软件是如何设计的，一方面也可以借鉴设计文档是如何写作的。</p><p>同时也要说明一下，设计文档的写法并没有一定之规，最重要的是这个文档能否向阅读者传递出架构师完整的设计意图。而不同的阅读者关注点是不同的，老板、客户、运维、测试、开发这些角色都是设计文档的阅读者，他们想要看到的东西显然是不一样的。</p><p>客户和测试人员可能更关注功能性需求和实现逻辑，老板和运维人员可能更关注非功能需求和整体架构，而开发人员可能更关注整体架构与关键技术细节。</p><p>我们专栏的案例基本上是以开发人员作为阅读视角进行编写的，你在阅读这些案例时，会明显感觉到我的表达方式和其他专栏文章不太一样，措辞会更“坚硬”一点，文字和读者的距离也有点“疏离”，而这正是设计文档自身的特质。</p><p>架构、系统，文档、相关人员之间的关系可以参考下面这张图。</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PxMzT0Oibf4ia9Fva7RU38ovpD2mCYXIm1M2PSqxlcstZxURH7ymkun4ebusbBh8B5ribqLqgboUXH9dy084U3Ljw/640?wx_fmt=png" alt=""></p><p>每个软件系统都需要有一个架构，每个架构都包含若干架构元素。架构元素就是前面提到的服务器、组件、类、消息、用例、状态等等。这些元素之间的关系是什么？如何把它们组织在一起？我们可以用部署图、组件图、时序图等各种模型图来描述。</p><p>架构最终需要一个文档来承载，把这些模型图放进这个文档，再配以适当的文字说明，就是一篇架构设计文档。而设计文档是给人阅读的，这些人就是系统的相关方。不同的相关方关注点不同，也需要由不同的模型图来进行表达，所以架构师应该针对不同的相关方，使用不同的模型图输出不同的架构文档。</p><h2 id="小结" tabindex="-1"><a class="header-anchor" href="#小结" aria-hidden="true">#</a> 小结</h2><p>软件设计就是在软件开发之前，对要解决的业务问题和对要实现的软件系统进行思考，并将这个思考的结果通过软件模型表达出来的过程。</p><p>人类作为万物之灵，最大的特点就是，在行动之前就已经在头脑中将行动的过程和行动的结果构建成了一个蓝图，然后将这个蓝图付诸实践。我们的祖先将第一块石头打磨成石器的时候，就已经拥有了这种能力。软件系统的开发是一个复杂的智力活动，参与其中的我们更需要拥有构建蓝图并付诸实践的能力。</p><p>目前有个很火的词叫“元宇宙”，“元”通俗地讲，就是一切开始的地方，是关于如何用自己描述自己，是抽象之上的抽象。这种“元”能力对架构师而言，非常重要。架构师只有掌握各种技术背后的技术，了解各种问题背后的问题，才能超越当下的种种羁绊，设计出面向未来的架构。</p><p>好了，今天就到这儿吧，我是飘渺，我们下期见~~</p><p>**转自：**<strong>https://time.geekbang.org/column/article/486761</strong></p><hr><h2 id="最后说一句-别白嫖-求关注" tabindex="-1"><a class="header-anchor" href="#最后说一句-别白嫖-求关注" aria-hidden="true">#</a> 最后说一句（别白嫖，求关注）</h2><p>新开了一个纯技术交流群（一群已满），群里氛围还不错，无广告，无套路，单纯的吹牛逼，侃人生，想进的可以通过下方二维码加我微信，备注进群！</p><p><img src="https://mmbiz.qpic.cn/mmbiz_jpg/PxMzT0Oibf4iaaq1LHN5nmBoW0HpH70QAzKz7kqcXajmMbhLkK7rc6CRLcKhybrXOkejBIMwTr56xxbGiameeNPEg/640?wx_fmt=jpeg" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/nice-article/jiagoushizenyanghuizhijitongjiagoulantu.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 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class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/jiagoushizenyanghuizhijitongjiagoulantu.html#前言" class="router-link-active router-link-exact-active toc-link level2">前言</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/jiagoushizenyanghuizhijitongjiagoulantu.html#软件建模" class="router-link-active router-link-exact-active toc-link level2">软件建模</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/jiagoushizenyanghuizhijitongjiagoulantu.html#软件设计方法" class="router-link-active router-link-exact-active toc-link level2">软件设计方法</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/jiagoushizenyanghuizhijitongjiagoulantu.html#类图" class="router-link-active router-link-exact-active toc-link level3">类图</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" 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level3">状态图</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/jiagoushizenyanghuizhijitongjiagoulantu.html#活动图" class="router-link-active router-link-exact-active toc-link level3">活动图</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/jiagoushizenyanghuizhijitongjiagoulantu.html#软件文档设计" class="router-link-active router-link-exact-active toc-link level2">软件文档设计</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/jiagoushizenyanghuizhijitongjiagoulantu.html#小结" class="router-link-active router-link-exact-active toc-link level2">小结</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/jiagoushizenyanghuizhijitongjiagoulantu.html#最后说一句-别白嫖-求关注" class="router-link-active router-link-exact-active toc-link level2">最后说一句（别白嫖，求关注）</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h2 id="前言" tabindex="-1"><a class="header-anchor" href="#前言" aria-hidden="true">#</a> 前言</h2><p>大家好，我是飘渺。</p><p>今天我们来了解一些关于软件设计文档的基础知识，这样你在学习后面的具体案例时，就能更加清楚地理解文档是基于什么方式来组织的了。</p><p>首先，请你设想这样一个场景：如果公司安排你做架构师，要你在项目开发前期进行软件架构设计，你该如何开展你的工作？如何输出你的工作成果？如何确定你的设计是否满足用户需求？你是否有把握最后交付的软件是满足要求的？是否有把握让团队每个工程师清楚自己的职责范围并有效地完成开发工作……</p><p>这些问题其实都是软件开发管理与技术架构的核心诉求，而架构师的核心工作就是做好软件设计，解决这些诉求。这些问题搞定了，软件的开发过程和结果也就都得到了保证。那怎么实现这些诉求呢？我们主要的手段就是软件建模，以及将这些软件模型组织成一篇有价值的软件设计文档。</p><h2 id="软件建模" tabindex="-1"><a class="header-anchor" href="#软件建模" aria-hidden="true">#</a> 软件建模</h2><p>所谓软件建模，就是为要开发的软件建造模型。</p><p>模型是对客观存在的抽象，例如著名的物理学公式 E=mc2，就是质量能量转换的物理规律的数学模型。除了物理学公式以外，还有一些东西也是模型，比如地图是对地理空间的建模；机械装置、电子电路、建筑设计的各种图纸是对物理实体的建模。而软件，也可以通过各种图进行建模。</p><p>软件系统庞大复杂，通过软件建模，我们可以抽象软件系统的主要特征和组成部分，梳理这些关键组成部分的关系。在软件开发过程中依照模型的约束开发，系统整体的格局和关系就会可控。相关人员从始至终都能清晰了解软件的蓝图和当前的进展，不同的开发工程师会清晰自己开发的模块和其他同事工作内容的关系与依赖，并按照这些模型开发代码。</p><p>那么我们是根据什么进行软件建模的呢？要解答这个疑问，你需要先知道，在软件开发中，有两个客观存在。</p><p>一个是我们要解决的领域问题。比如我们要开发一个电子商务网站，那么客观的领域问题就是如何做生意，卖家如何管理商品、管理订单、服务用户，买家如何挑选商品，如何下订单，如何支付等等。对这些客观领域问题的抽象就是各种功能及其关系、各种模型对象及其关系、各种业务处理流程。</p><p>另一个客观存在就是最终开发出来的软件系统。软件系统要解决的问题包括软件由哪些主要类组成，这些类如何组织构成一个个的组件，这些类和组件之间的依赖关系如何，运行期如何调用，需要部署多少台服务器，服务器之间如何通信等。</p><p>而对这两个客观存在进行抽象化处理的手段，就是我们的软件模型。</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PxMzT0Oibf4ia9Fva7RU38ovpD2mCYXIm1UVdmia0792Oeicm4HEfvaHPvbfyWgbmP8fzxf36tnKWLKwaeiaCmBwCBg/640?wx_fmt=png" alt=""></p><p>一方面我们要对领域问题和要设计的软件系统进行分析、设计、抽象，另一方面，我们根据抽象出来的模型进行开发，最终实现出一个软件系统，这就是软件开发的主要过程。而对领域问题和软件系统进行分析、设计和抽象的这个过程，就是软件建模设计。</p><h2 id="软件设计方法" tabindex="-1"><a class="header-anchor" href="#软件设计方法" aria-hidden="true">#</a> 软件设计方法</h2><p>因此，软件设计其实就是软件建模的过程。我们通过软件建模工具，将软件模型画出来，实现软件设计。</p><p>在实践中，通常用来进行软件建模画图的工具是 UML，统一建模语言。UML 包含的软件模型有 10 种，其中常用的有 7 种：类图、序列图、组件图、部署图、用例图、状态图和活动图。</p><p>下面我们简单了解下这 7 种常用 UML 图的使用场景和基本样例。在专栏后面的设计文档中，你会多次见到它们，看多了，你就懂了，也就自然会画了。当然，如果你想更详细地学习 UML 知识，我也非常鼓励，并且推荐你阅读马丁富勒的《UML 精粹》一书。</p><h3 id="类图" tabindex="-1"><a class="header-anchor" href="#类图" aria-hidden="true">#</a> 类图</h3><p>类图是最常见的 UML 图形，用来描述类的特性和类之间的静态关系。</p><p>一个类包含三个部分：类的名字、类的属性列表和类的方法列表。类之间有 6 种静态关系：关联、依赖、组合、聚合、继承、泛化。把相关的一组类及其关系用一张图画出来，就是类图。</p><p>比如你在后面的课程中会遇到下面这幅图，它就是类图。你可以把我上面说的类图包含元素和图片一一对照，感受类图的用法。</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PxMzT0Oibf4ia9Fva7RU38ovpD2mCYXIm1AUopK9QQDr6pV5WBp5Nkp4JQRrZKBY4PkicgCj6kg4feC1wcW6U5mQw/640?wx_fmt=png" alt=""></p><h3 id="时序图" tabindex="-1"><a class="header-anchor" href="#时序图" aria-hidden="true">#</a> 时序图</h3><p>类图之外，另一种常用的图是时序图，类图描述类之间的静态关系，时序图则用来描述参与者之间的动态调用关系。</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PxMzT0Oibf4ia9Fva7RU38ovpD2mCYXIm1EcAr3PticUpWHHw7DAczyFaHZVu2UXy8XQ3haOgqqzgYPXFDvfGMahA/640?wx_fmt=png" alt=""></p><h3 id="组件图" tabindex="-1"><a class="header-anchor" href="#组件图" aria-hidden="true">#</a> 组件图</h3><p>组件是比类粒度更大的设计元素，一个组件中通常包含很多个类。组件图有的时候和包图的用途比较接近，组件图通常用来描述物理上的组件，比如一个 JAR、一个 DLL 等等。在实践中，我们进行模块设计的时候，用得更多的就是组件图。</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PxMzT0Oibf4ia9Fva7RU38ovpD2mCYXIm1ge6DR9VNudpF79ic5ACNSaWfbc3MeL53PyYuxIwvibPoGicpibQsOXFZibQ/640?wx_fmt=png" alt=""></p><p>组件图描述组件之间的静态关系，主要是依赖关系，如果你想要描述组件之间的动态调用关系，可以使用组件时序图，以组件作为参与者，描述组件之间的消息调用关系。</p><h3 id="部署图" tabindex="-1"><a class="header-anchor" href="#部署图" aria-hidden="true">#</a> 部署图</h3><p>部署图描述软件系统的最终部署情况，比如需要部署多少服务器，关键组件都部署在哪些服务器上。</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PxMzT0Oibf4ia9Fva7RU38ovpD2mCYXIm1Nj686l5iat4aaxb22dzibKUNNdn4fncgRnIjgicia3klrFmJUb4mh2yY2A/640?wx_fmt=png" alt=""></p><p>部署图是软件系统最终物理呈现的蓝图，根据部署图，所有相关者，诸如客户、老板、工程师都能清晰地了解到最终运行的系统在物理上是什么样子，和现有的系统服务器的关系，和第三方服务器的关系。根据部署图，还可以估算服务器和第三方软件的采购成本。</p><p>因此部署图是整个软件设计模型中，比较宏观的一种图，是在设计早期就需要画的一种模型图。根据部署图，各方可以讨论对这个方案是否认可。只有对部署图达成共识，才能继续后面的细节设计。</p><h3 id="用例图" tabindex="-1"><a class="header-anchor" href="#用例图" aria-hidden="true">#</a> 用例图</h3><p>用例图通过反映用户和软件系统的交互，描述系统的功能需求。</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PxMzT0Oibf4ia9Fva7RU38ovpD2mCYXIm1cDQtmQibY0JasQqXzmH79ib1pj4WziajST03YL4yiaibKicVwy0ooono02lw/640?wx_fmt=png" alt=""></p><p>图中小人形象的元素，被称为角色，角色可以是人，也可以是其他的系统。系统的功能可能会很复杂，所以一张用例图可能只包含其中一小部分功能，这些功能被一个矩形框框起来，这个矩形框被称为用例的边界。框里的椭圆表示一个一个的功能，功能之间可以调用依赖，也可以进行功能扩展。</p><h3 id="状态图" tabindex="-1"><a class="header-anchor" href="#状态图" aria-hidden="true">#</a> 状态图</h3><p>状态图用来展示单个对象生命周期的状态变迁。</p><p>业务系统中，很多重要的领域对象都有比较复杂的状态变迁，比如账号，有创建状态、激活状态、冻结状态、欠费状态等等各种状态。此外，用户、订单、商品、红包这些常见的领域模型都有多种状态。</p><p>这些状态的变迁描述可以在用例图中用文字描述，随着角色的各种操作而改变，但是用这种方式描述，状态散乱在各处，不要说开发的时候容易搞错，就是产品经理自己在设计的时候，也容易搞错对象的状态变迁。</p><p>UML 的状态图可以很好地解决这一问题，一张状态图描述一个对象生命周期的各种状态，及其变迁的关系。如图所示，门的状态有开 Opened、关 Closed 和锁 Locked 三种，状态与变迁关系用一张状态图就可以搞定。</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PxMzT0Oibf4ia9Fva7RU38ovpD2mCYXIm19rM7gVEzyufk01L7xM6eKPybnYcUIEp1ndQg5GKB0GboU0iaVefb5Mg/640?wx_fmt=png" alt=""></p><h3 id="活动图" tabindex="-1"><a class="header-anchor" href="#活动图" aria-hidden="true">#</a> 活动图</h3><p>活动图主要用来描述过程逻辑和业务流程。UML 中没有流程图，很多时候，人们用活动图代替流程图。</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PxMzT0Oibf4ia9Fva7RU38ovpD2mCYXIm1QdyA2cGvyDJwEAMIQicx3aS4zGafmtBFz9b7hgU6DYjj4FBUwQvxYWA/640?wx_fmt=png" alt=""></p><p>活动图和早期流程图的图形元素也很接近，实心圆代表流程开始，空心圆代表流程结束，圆角矩形表示活动，菱形表示分支判断。</p><p>此外，活动图引入了一个重要的概念——泳道。活动图可以根据活动的范围，将活动根据领域、系统和角色等划分到不同的泳道中，使流程边界更加清晰。</p><p>我们上面介绍了 UML 建模常用的 7 种模型，那么这 7 种模型分别应用在软件设计的什么阶段？用来表达什么样的设计意图呢？</p><h2 id="软件文档设计" tabindex="-1"><a class="header-anchor" href="#软件文档设计" aria-hidden="true">#</a> 软件文档设计</h2><p>软件设计文档就是架构师的主要工作成果，它需要阐释本文开头提到的各种诉求，描绘软件的完整蓝图，而软件设计文档的主要组成部分就是软件模型。</p><p>软件设计过程可以拆分成需求分析、概要设计和详细设计三个阶段。</p><p>在需求分析阶段，主要是通过用例图来描述系统的功能与使用场景；对于关键的业务流程，可以通过活动图描述；如果在需求阶段就提出要和现有的某些子系统整合，那么可以通过时序图描述新系统和原来的子系统的调用关系；可以通过简化的类图进行领域模型抽象，并描述核心领域对象之间的关系；如果某些对象内部会有复杂的状态变化，比如用户、订单这些，可以用状态图进行描述。</p><p>在概要设计阶段，通过部署图描述系统最终的物理蓝图；通过组件图以及组件时序图设计软件主要模块及其关系；还可以通过组件活动图描述组件间的流程逻辑。</p><p>在详细设计阶段，主要输出的就是类图和类的时序图，指导最终的代码开发，如果某个类方法内部有比较复杂的逻辑，那么可以将这个方法的逻辑用活动图进行描述。</p><p>我们在每个设计阶段使用几种 UML 模型对领域或者系统进行建模，然后将这些模型配上必要的文字说明写入到文档中，就可以构成一篇软件设计文档了。</p><p>我们专栏中的十几讲软件设计案例，都是按照这样的方式组织的，你可以在学习的过程中，一方面了解各种系统软件是如何设计的，一方面也可以借鉴设计文档是如何写作的。</p><p>同时也要说明一下，设计文档的写法并没有一定之规，最重要的是这个文档能否向阅读者传递出架构师完整的设计意图。而不同的阅读者关注点是不同的，老板、客户、运维、测试、开发这些角色都是设计文档的阅读者，他们想要看到的东西显然是不一样的。</p><p>客户和测试人员可能更关注功能性需求和实现逻辑，老板和运维人员可能更关注非功能需求和整体架构，而开发人员可能更关注整体架构与关键技术细节。</p><p>我们专栏的案例基本上是以开发人员作为阅读视角进行编写的，你在阅读这些案例时，会明显感觉到我的表达方式和其他专栏文章不太一样，措辞会更“坚硬”一点，文字和读者的距离也有点“疏离”，而这正是设计文档自身的特质。</p><p>架构、系统，文档、相关人员之间的关系可以参考下面这张图。</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PxMzT0Oibf4ia9Fva7RU38ovpD2mCYXIm1M2PSqxlcstZxURH7ymkun4ebusbBh8B5ribqLqgboUXH9dy084U3Ljw/640?wx_fmt=png" alt=""></p><p>每个软件系统都需要有一个架构，每个架构都包含若干架构元素。架构元素就是前面提到的服务器、组件、类、消息、用例、状态等等。这些元素之间的关系是什么？如何把它们组织在一起？我们可以用部署图、组件图、时序图等各种模型图来描述。</p><p>架构最终需要一个文档来承载，把这些模型图放进这个文档，再配以适当的文字说明，就是一篇架构设计文档。而设计文档是给人阅读的，这些人就是系统的相关方。不同的相关方关注点不同，也需要由不同的模型图来进行表达，所以架构师应该针对不同的相关方，使用不同的模型图输出不同的架构文档。</p><h2 id="小结" tabindex="-1"><a class="header-anchor" href="#小结" aria-hidden="true">#</a> 小结</h2><p>软件设计就是在软件开发之前，对要解决的业务问题和对要实现的软件系统进行思考，并将这个思考的结果通过软件模型表达出来的过程。</p><p>人类作为万物之灵，最大的特点就是，在行动之前就已经在头脑中将行动的过程和行动的结果构建成了一个蓝图，然后将这个蓝图付诸实践。我们的祖先将第一块石头打磨成石器的时候，就已经拥有了这种能力。软件系统的开发是一个复杂的智力活动，参与其中的我们更需要拥有构建蓝图并付诸实践的能力。</p><p>目前有个很火的词叫“元宇宙”，“元”通俗地讲，就是一切开始的地方，是关于如何用自己描述自己，是抽象之上的抽象。这种“元”能力对架构师而言，非常重要。架构师只有掌握各种技术背后的技术，了解各种问题背后的问题，才能超越当下的种种羁绊，设计出面向未来的架构。</p><p>好了，今天就到这儿吧，我是飘渺，我们下期见~~</p><p>**转自：**<strong>https://time.geekbang.org/column/article/486761</strong></p><hr><h2 id="最后说一句-别白嫖-求关注" tabindex="-1"><a class="header-anchor" href="#最后说一句-别白嫖-求关注" aria-hidden="true">#</a> 最后说一句（别白嫖，求关注）</h2><p>新开了一个纯技术交流群（一群已满），群里氛围还不错，无广告，无套路，单纯的吹牛逼，侃人生，想进的可以通过下方二维码加我微信，备注进群！</p><p><img src="https://mmbiz.qpic.cn/mmbiz_jpg/PxMzT0Oibf4iaaq1LHN5nmBoW0HpH70QAzKz7kqcXajmMbhLkK7rc6CRLcKhybrXOkejBIMwTr56xxbGiameeNPEg/640?wx_fmt=jpeg" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/nice-article/jiagoushizenyanghuizhijitongjiagoulantu.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 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class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->接了很多私活的感触</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><span class="author-item">前端要努力</span></span><span property="author" content="前端要努力"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 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router-link-exact-active toc-link level2">私活的种类</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/jielehenduosihuodiganchu.html#渠道" class="router-link-active router-link-exact-active toc-link level2">渠道</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/jielehenduosihuodiganchu.html#如何谈价格" class="router-link-active router-link-exact-active toc-link level2">如何谈价格</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/jielehenduosihuodiganchu.html#收入" class="router-link-active router-link-exact-active toc-link level2">收入</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/jielehenduosihuodiganchu.html#风险" class="router-link-active router-link-exact-active toc-link level2">风险</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/jielehenduosihuodiganchu.html#时间-金钱-vs-时间-u003e-u003e-u003e金钱" class="router-link-active router-link-exact-active toc-link level2">时间 === 金钱 vs 时间\u003E\u003E\u003E金钱</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/jielehenduosihuodiganchu.html#传送门" class="router-link-active router-link-exact-active toc-link level2">传送门</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><hr><h2 id="theme-awesome-green" tabindex="-1"><a class="header-anchor" href="#theme-awesome-green" aria-hidden="true">#</a> theme: awesome-green</h2><h2 id="接私活" tabindex="-1"><a class="header-anchor" href="#接私活" aria-hidden="true">#</a> 接私活</h2><ul><li>今年搞了一个团队接私活，现在有20多人，我这边主要负责商务洽谈，合同签署，进度，风险把控，结果交付之类的活，不涉及到具体代码的编写，交付了好几个项目，今天来谈一谈私活的一些经历</li></ul><h2 id="私活的种类" tabindex="-1"><a class="header-anchor" href="#私活的种类" aria-hidden="true">#</a> 私活的种类</h2><ul><li>总类就太多了，后台管理，跨境电商，股票交易，小程序，APP，等等</li><li>有总包或者单包一说，总包就是前后端，服务器都包，算总价；单包就是，你只做前端或者后端，对于你一个人的话，基本上是单包的比较多，总包的话，小项目可以，大项目你一个人就吃不住了，交付风险巨大</li></ul><h2 id="渠道" tabindex="-1"><a class="header-anchor" href="#渠道" aria-hidden="true">#</a> 渠道</h2><ul><li>各种众包的网站，但是我看上面报价太低了，感觉很不靠谱，没有接过</li><li>主要是朋友，渠道介绍</li><li>还有的同学接国外的单，但是吃英语，英语不好没法沟通</li></ul><h2 id="如何谈价格" tabindex="-1"><a class="header-anchor" href="#如何谈价格" aria-hidden="true">#</a> 如何谈价格</h2><ul><li><p>接过私活的同学都知道，你人在上海，和人在西安的人天价格都是不一样的，而且每个人的工资都是不一样的</p></li><li><p>首先一点要求你的经验丰富些，你第一次不会，你可以找一些资深的技术帮你去做估时间，大概要多少人天，要按照你自己的水平做一个合理的排期，然后才好谈价格</p></li><li><p>比方你现在工资30000一个月然后30000\u002F21.75 = 1379 ，一般接私活的价格是你的日薪水的1.5 倍，如果低于2000人天你是不划算的，还不如去公司加班，因为你做私活是面向结果交付的，没办法摸鱼！所以你要怎么能够达到你日薪2K的收入，这就很有讲究！你报价2k\u002F人天，不用想你肯定会被pass的！</p></li><li><p>一般的价格500-1000\u002F人天，太高了甲方一做对比就不会让你干了，货比三家吗，所以这个时候就很有讲究了，也就是套路来了，单价低，你就把时间干长，但是也不能太长，这时候就是沟通的艺术了，如何达到自己的目的，然后让甲方满意，你自己也满意，如果都不满意这个活也就没有继续干下去的必要了，</p></li></ul><h2 id="收入" tabindex="-1"><a class="header-anchor" href="#收入" aria-hidden="true">#</a> 收入</h2><ul><li>收入多少看项目，有的小项目几K，有的几万，几十万，还有的同学能够接住几百万的项目，大家不用觉得吃惊，单价10万+的项目非常多，但是资源只掌握在少部分人的手里，你干一个大项目就够你吃好多年了，上个月一个朋友说他们团队接了一个总包近500W的大项目，说实话酸的很，为何不是我接的，接到手立马辞职，哈哈！透露一点，在某些领域，非常吃关系，有资源的同学，动动嘴钱就到手了，你看他啥也没干，6位数或者更高的收益就到手了，大家不要喷我，我是经历过，懂的都懂；</li><li>对于我个人，我不写代码，我负责管理，风险把控，我拿10%-25%，看项目的大小！目前接过最大的项目过6位数，所以我在这块收入也是不稳定的，随缘，这个月没接到项目一分没有，多了就不好说了！看运气！一般低于一万的项目我是不接的，直接转手给被人做，没的赚头！</li></ul><h2 id="风险" tabindex="-1"><a class="header-anchor" href="#风险" aria-hidden="true">#</a> 风险</h2><ul><li>交付风险：这个钱你能不能挣，能不能按期，按质量的交付，别钱没赚到，项目烂尾，还搞一肚子气</li><li>一手交钱，一手交代码，这是规矩，有的同学不懂，把代码给甲方，尾款就凉了，找谁说理去！</li><li>比方项目排期为5个迭代，加上定金和尾款应该就是7个迭代，按照迭代给钱，那钱的交付就是定金：20%-30%，尾款：这个控制的低一点，因为很多不靠谱的甲方会压你的尾款，大概10%，其他的就是迭代内平均分，每个迭代交付结束之后付钱</li><li>不要一起交付再给钱，小项目可以，大项目一定要分期结算，不然遇到不靠谱的人，不给你钱，你也很无奈！</li><li>有的时候别人会让你给发票之类的，你要是个人的，花点钱找别人搞，税点要不了多少钱！</li><li>做事情做重要的是诚信，对于一些不靠谱的甲方，直接pass掉，长痛不如短痛，接了之后钱挣不了多少，搞的一肚子火！</li><li>反正这个钱不好挣，会搞的你非常忙，你要是写业务，有些时候遇到不靠谱的会让你很难受</li><li>不要影响到你的本职工作！！！这个很重要，反正我在工作时间内不会去花时间搞这些玩意，主业还是要做好，私活是不稳定的！</li></ul><h2 id="时间-金钱-vs-时间-u003e-u003e-u003e金钱" tabindex="-1"><a class="header-anchor" href="#时间-金钱-vs-时间-u003e-u003e-u003e金钱" aria-hidden="true">#</a> 时间 === 金钱 vs 时间\u003E\u003E\u003E金钱</h2><ul><li><p>思考下，你是把你的时间花在接私活上面，还是花在提升个人能力上面</p></li><li><p>据我了解，对大部分人来说做私活一个月能做到1w以上的人基本寥寥无几，你如果手握资源，那随意搞钱</p></li><li><p>我虽然带了很多人接私活做，我只是整合资源，赚个提成；但是我还是不建议大家把宝押在接私活上面，因为我觉得这个本来就是不稳定的，一定要把绝大部分的时间压在提升个人能力上面，有人会说接私活写项目，不是也在提升自己的个人能力吗！我觉得不是的，你接私活做很多项目，只能说你写代码比较熟练，你是面向结果快速交付的，只要甲方觉得没问题，你不会去考虑项目性能，优化之类的，角度站高一点，你做的事情太杂，对于你个人成长的价值不是很大！凡事都有但是，哈哈，万一你有机会接到500w的项目呢！这时候不要想了，赶紧接下来，哈哈！</p></li><li><p>大家加油！干啥都行，心里觉得平衡就可以，主要还是看你自己的抉择！但是一定要把主业工作干好，干漂亮！</p></li></ul><h2 id="传送门" tabindex="-1"><a class="header-anchor" href="#传送门" aria-hidden="true">#</a> 传送门</h2><ul><li><a href="https:%5Cu002F%5Cu002Fjuejin.cn%5Cu002Fpost%5Cu002F7086381206236823559">铜三铁四下，拿到前端技术专家的offer</a></li><li><a href="https:%5Cu002F%5Cu002Fjuejin.cn%5Cu002Fpost%5Cu002F7036689189567463432">卷王的2021总结</a></li><li><a href="https:%5Cu002F%5Cu002Fjuejin.cn%5Cu002Fuser%5Cu002F1943592288395479%5Cu002Fpins">六点打卡交流群</a></li><li><a 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clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->接了很多私活的感触</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><span class="author-item">前端要努力</span></span><span property="author" content="前端要努力"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年5月29日</span><meta property="datePublished" content="2022-05-29T01:05:54.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 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class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/jielehenduosihuodiganchu.html#theme-awesome-green" class="router-link-active router-link-exact-active toc-link level2">theme: awesome-green</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/jielehenduosihuodiganchu.html#接私活" class="router-link-active router-link-exact-active toc-link level2">接私活</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/jielehenduosihuodiganchu.html#私活的种类" class="router-link-active router-link-exact-active toc-link level2">私活的种类</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/jielehenduosihuodiganchu.html#渠道" class="router-link-active router-link-exact-active toc-link level2">渠道</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/jielehenduosihuodiganchu.html#如何谈价格" class="router-link-active router-link-exact-active toc-link level2">如何谈价格</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/jielehenduosihuodiganchu.html#收入" class="router-link-active router-link-exact-active toc-link level2">收入</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/jielehenduosihuodiganchu.html#风险" class="router-link-active router-link-exact-active toc-link level2">风险</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/jielehenduosihuodiganchu.html#时间-金钱-vs-时间-u003e-u003e-u003e金钱" class="router-link-active router-link-exact-active toc-link level2">时间 === 金钱 vs 时间\u003E\u003E\u003E金钱</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/jielehenduosihuodiganchu.html#传送门" class="router-link-active router-link-exact-active toc-link level2">传送门</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><hr><h2 id="theme-awesome-green" tabindex="-1"><a class="header-anchor" href="#theme-awesome-green" aria-hidden="true">#</a> theme: awesome-green</h2><h2 id="接私活" tabindex="-1"><a class="header-anchor" href="#接私活" aria-hidden="true">#</a> 接私活</h2><ul><li>今年搞了一个团队接私活，现在有20多人，我这边主要负责商务洽谈，合同签署，进度，风险把控，结果交付之类的活，不涉及到具体代码的编写，交付了好几个项目，今天来谈一谈私活的一些经历</li></ul><h2 id="私活的种类" tabindex="-1"><a class="header-anchor" href="#私活的种类" aria-hidden="true">#</a> 私活的种类</h2><ul><li>总类就太多了，后台管理，跨境电商，股票交易，小程序，APP，等等</li><li>有总包或者单包一说，总包就是前后端，服务器都包，算总价；单包就是，你只做前端或者后端，对于你一个人的话，基本上是单包的比较多，总包的话，小项目可以，大项目你一个人就吃不住了，交付风险巨大</li></ul><h2 id="渠道" tabindex="-1"><a class="header-anchor" href="#渠道" aria-hidden="true">#</a> 渠道</h2><ul><li>各种众包的网站，但是我看上面报价太低了，感觉很不靠谱，没有接过</li><li>主要是朋友，渠道介绍</li><li>还有的同学接国外的单，但是吃英语，英语不好没法沟通</li></ul><h2 id="如何谈价格" tabindex="-1"><a class="header-anchor" href="#如何谈价格" aria-hidden="true">#</a> 如何谈价格</h2><ul><li><p>接过私活的同学都知道，你人在上海，和人在西安的人天价格都是不一样的，而且每个人的工资都是不一样的</p></li><li><p>首先一点要求你的经验丰富些，你第一次不会，你可以找一些资深的技术帮你去做估时间，大概要多少人天，要按照你自己的水平做一个合理的排期，然后才好谈价格</p></li><li><p>比方你现在工资30000一个月然后30000\u002F21.75 = 1379 ，一般接私活的价格是你的日薪水的1.5 倍，如果低于2000人天你是不划算的，还不如去公司加班，因为你做私活是面向结果交付的，没办法摸鱼！所以你要怎么能够达到你日薪2K的收入，这就很有讲究！你报价2k\u002F人天，不用想你肯定会被pass的！</p></li><li><p>一般的价格500-1000\u002F人天，太高了甲方一做对比就不会让你干了，货比三家吗，所以这个时候就很有讲究了，也就是套路来了，单价低，你就把时间干长，但是也不能太长，这时候就是沟通的艺术了，如何达到自己的目的，然后让甲方满意，你自己也满意，如果都不满意这个活也就没有继续干下去的必要了，</p></li></ul><h2 id="收入" tabindex="-1"><a class="header-anchor" href="#收入" aria-hidden="true">#</a> 收入</h2><ul><li>收入多少看项目，有的小项目几K，有的几万，几十万，还有的同学能够接住几百万的项目，大家不用觉得吃惊，单价10万+的项目非常多，但是资源只掌握在少部分人的手里，你干一个大项目就够你吃好多年了，上个月一个朋友说他们团队接了一个总包近500W的大项目，说实话酸的很，为何不是我接的，接到手立马辞职，哈哈！透露一点，在某些领域，非常吃关系，有资源的同学，动动嘴钱就到手了，你看他啥也没干，6位数或者更高的收益就到手了，大家不要喷我，我是经历过，懂的都懂；</li><li>对于我个人，我不写代码，我负责管理，风险把控，我拿10%-25%，看项目的大小！目前接过最大的项目过6位数，所以我在这块收入也是不稳定的，随缘，这个月没接到项目一分没有，多了就不好说了！看运气！一般低于一万的项目我是不接的，直接转手给被人做，没的赚头！</li></ul><h2 id="风险" tabindex="-1"><a class="header-anchor" href="#风险" aria-hidden="true">#</a> 风险</h2><ul><li>交付风险：这个钱你能不能挣，能不能按期，按质量的交付，别钱没赚到，项目烂尾，还搞一肚子气</li><li>一手交钱，一手交代码，这是规矩，有的同学不懂，把代码给甲方，尾款就凉了，找谁说理去！</li><li>比方项目排期为5个迭代，加上定金和尾款应该就是7个迭代，按照迭代给钱，那钱的交付就是定金：20%-30%，尾款：这个控制的低一点，因为很多不靠谱的甲方会压你的尾款，大概10%，其他的就是迭代内平均分，每个迭代交付结束之后付钱</li><li>不要一起交付再给钱，小项目可以，大项目一定要分期结算，不然遇到不靠谱的人，不给你钱，你也很无奈！</li><li>有的时候别人会让你给发票之类的，你要是个人的，花点钱找别人搞，税点要不了多少钱！</li><li>做事情做重要的是诚信，对于一些不靠谱的甲方，直接pass掉，长痛不如短痛，接了之后钱挣不了多少，搞的一肚子火！</li><li>反正这个钱不好挣，会搞的你非常忙，你要是写业务，有些时候遇到不靠谱的会让你很难受</li><li>不要影响到你的本职工作！！！这个很重要，反正我在工作时间内不会去花时间搞这些玩意，主业还是要做好，私活是不稳定的！</li></ul><h2 id="时间-金钱-vs-时间-u003e-u003e-u003e金钱" tabindex="-1"><a class="header-anchor" href="#时间-金钱-vs-时间-u003e-u003e-u003e金钱" aria-hidden="true">#</a> 时间 === 金钱 vs 时间\u003E\u003E\u003E金钱</h2><ul><li><p>思考下，你是把你的时间花在接私活上面，还是花在提升个人能力上面</p></li><li><p>据我了解，对大部分人来说做私活一个月能做到1w以上的人基本寥寥无几，你如果手握资源，那随意搞钱</p></li><li><p>我虽然带了很多人接私活做，我只是整合资源，赚个提成；但是我还是不建议大家把宝押在接私活上面，因为我觉得这个本来就是不稳定的，一定要把绝大部分的时间压在提升个人能力上面，有人会说接私活写项目，不是也在提升自己的个人能力吗！我觉得不是的，你接私活做很多项目，只能说你写代码比较熟练，你是面向结果快速交付的，只要甲方觉得没问题，你不会去考虑项目性能，优化之类的，角度站高一点，你做的事情太杂，对于你个人成长的价值不是很大！凡事都有但是，哈哈，万一你有机会接到500w的项目呢！这时候不要想了，赶紧接下来，哈哈！</p></li><li><p>大家加油！干啥都行，心里觉得平衡就可以，主要还是看你自己的抉择！但是一定要把主业工作干好，干漂亮！</p></li></ul><h2 id="传送门" tabindex="-1"><a class="header-anchor" href="#传送门" aria-hidden="true">#</a> 传送门</h2><ul><li><a href="https:%5Cu002F%5Cu002Fjuejin.cn%5Cu002Fpost%5Cu002F7086381206236823559">铜三铁四下，拿到前端技术专家的offer</a></li><li><a href="https:%5Cu002F%5Cu002Fjuejin.cn%5Cu002Fpost%5Cu002F7036689189567463432">卷王的2021总结</a></li><li><a href="https:%5Cu002F%5Cu002Fjuejin.cn%5Cu002Fuser%5Cu002F1943592288395479%5Cu002Fpins">六点打卡交流群</a></li><li><a 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pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><span class="author-item">findyi</span></span><span property="author" content="findyi"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年5月29日</span><meta property="datePublished" content="2022-05-29T01:05:54.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 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category4" role>优质文章</li><meta property="articleSection" content="优质文章"></ul></span><!----><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 6 分钟</span><meta property="timeRequired" content="PT6M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><p>阅读本文大概需要6分钟。</p><p>昨天某nft公司公众号的一篇文章刷屏了，几小时就获得了几十万阅读。</p><p>这篇文章是这家公司的前任技术负责人写的，看得出来这哥们怨念很深：</p><p><img src="https://mmbiz.qpic.cn/mmbiz_jpg/ibDBKEpdfwEBq1EjG5gX3tVbz2WwJjKxAL7OZ6rRz6B1lwonvGU8cCeEu9OykTqEk4iarAriccO5FuQwBA5xb0CMQ/640?wx_fmt=jpeg" alt=""></p><p>40天赶出一个app但老板不满意，老板认为20天足够了，其实做过原生app开发的同学应该知道，这个速度还算比较快了。</p><p>并且火急火燎的上线导致bug不少，老板的应对方式不是谅解，而是开启无限攻击模式，最终把这个技术负责人和技术团队都给开了。</p><p>看完后感触良多，洋哥曾经也做过A/B轮公司CTO，也遇到过很多糟心的事情，一句话总结：技术负责人在不懂技术且不尊重技术的老板那，就是个夜壶。夜壶是什么？急的时候就是个宝贝，不急了就一脚踢开。</p><p>这是很多技术负责人的现状和无奈，经常也有技术总监朋友问洋哥诸如这样的问题：怎么样让老板知道开发时间不能再短了？</p><p>怎么样让老板理解技术人员薪资是比运营高的？怎么样让老板知道一天超过12个小时真的效率很低了？</p><p>讲真并没有什么办法，老板并不是不懂，而是故意装不懂。</p><p>最近甚至有一个“新物种”：“中华田园敏捷开发”</p><p>这玩意尤其在土老板那非常有市场：这个功能很不错、怎么实现我不管、“现在就要！”。</p><p>简单点说：中华田园敏捷开发的核心在于“快”，这种“快”是拍脑袋的快，基本由老板或业务负责人，又或者产品经理来决定上线时间，研发leader和码农无权干涉，甚至无权提意见。</p><p>如果提？轻则挨批，重则滚蛋！</p><p>在他们眼里，码农们甚至技术总监、CTO都是昂贵的耗材：LZ给你们这么多钱，养着你们、供着你们，让你明天上线居然做不到？那还要你们干啥，给我G。</p><p>那么除了能祝这样的公司早日倒闭，这样的老板早日破产，技术负责人们还能做什么呢？</p><p>简单给几点建议：</p><p><strong>1.打不过就加入</strong></p><p>技术负责人经常要面对老板、运营负责人、产品负责人等多维度的质疑和围攻毒打。</p><p>相信我，如果你不是天赋异禀那么只靠技术显然是打不过他们的。</p><p>但如果你即精通技术，恰好又懂一点点产品运营，那么事情就开始发生微妙的变化了。</p><p>这时候你是绝对的T型人才，能很轻松的找到技术-产品、技术-运营的效率最大化边界。同时因为你懂，所以也不会被忽悠被牵着鼻子走。</p><p><strong>2.学会其他岗位的“沟通语言”</strong></p><p>技术负责人需要和不同部门协调资源、推进合作、判断需求，有时候可能还要做跨公司的沟通。</p><p>有时候，技术人和其他部门的同事会有沟通困难的感觉，甚至相互都觉得对方不能理解自己，其实往往是沟通语言上出了问题。</p><p>技术人很容易陷入只说技术指标、技术特征、技术选型的陷阱。往往把对方讲得一头雾水还很自嗨，但这一刻沟通就已经失败了。</p><p>破解之道在于，和产品沟通就多说点技术提升对产品效用的影响，和运营沟通就多说点对用户ltv、转化率的帮助等等。</p><p><strong>3.不断降低老板的预期</strong></p><p>预期这玩意一旦被拉起来就降不下去，对于技术负责人来说降低老板预期非常重要。</p><p>尤其是面对不懂技术的老板，他只知道：你前几次都搞定了，这次肯定没问题。</p><p>这个时候就要提前预警，告知老板事情的风险点和困难度，不然出了成绩还可能被认为在偷奸耍滑。</p><p>有的朋友在面试的过程中就给老板拉满了预期：这些问题我入职后，统统解决。</p><p>入职后一开始还好，一些问题被解决了，哪一次没解决慢慢积累，老板的信任很快就不在了。</p><p>时刻谨记不要把话说满，宁愿超出预期给出惊喜，也不要承诺后给出惊吓。</p><p><strong>写在最后的话：</strong></p><p>以上三点真做到了，能显著增加技术负责人的生存周期。但很遗憾因为技术的底层属性：不直接创造业绩和收入，技术人在不成熟的管理体系中就是被当作耗材对待的，这一点无法撼动。</p><p>所以职场有个很奇怪的现象：各种CXO中CTO跳槽率是最频繁的，有时候真的是被逼的。</p><p>最后，祝每一个技术人都能被善待吧！</p><p>今天就写这么多了，我们下期见～</p><p><strong>其他原创：</strong></p><p><a href="http://mp.weixin.qq.com/s?__biz=MzA3MzA5MTU4NA==&amp;mid=2247503124&amp;idx=1&amp;sn=b76b916b5c152c93251a4d0a2381933e&amp;chksm=9f16d27ba8615b6df913c9334a44877707fa78fad5307195915eb3d16427ce5cc3d5436fb067&amp;scene=21#wechat_redirect" target="_blank" rel="noopener noreferrer">美国计算机高校YYDS?<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><p><a 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href="http://mp.weixin.qq.com/s?__biz=MzA3MzA5MTU4NA==&amp;mid=2247502948&amp;idx=1&amp;sn=cfcf909f631c8c1958e9fce8ec6c6963&amp;chksm=9f16d30ba8615a1dec79c56eac90d825411513d18d9ca6353bae6585c81c03f9bb3111c68e1d&amp;scene=21#wechat_redirect" target="_blank" rel="noopener noreferrer">晋升阿里P7，真的难！<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><p><a href="http://mp.weixin.qq.com/s?__biz=MzA3MzA5MTU4NA==&amp;mid=2247502418&amp;idx=1&amp;sn=438a85f6dc66bafd7ca2ad5754852473&amp;chksm=9f16d53da8615c2bdb945192152eec56e2f8e2ac756b2db444862a0a9fcd9a34546975796061&amp;scene=21#wechat_redirect" target="_blank" rel="noopener noreferrer">上海交大本硕转码求职春招，0 offer！<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><p>PS:最近弄了一个新微信号，欢迎大家围观，洋哥是个不错的段子手、鸡汤大师：</p><h6 id="" tabindex="-1"><a class="header-anchor" href="#" aria-hidden="true">#</a> <img src="https://mmbiz.qpic.cn/mmbiz_png/ibDBKEpdfwEB360Zz7JnldNY0KWTziciaR8ztEcJzZqR51zkSQvqHjASCiamVsJlVydx8RV2DZYdndlr2Djiarn383Q/640?wx_fmt=png" alt=""></h6><p><img src="https://mmbiz.qpic.cn/mmbiz_jpg/ibDBKEpdfwEAvyxa3myBjNQeKlsX1uB3mmcpMQbSEBcAYJxaIAaH3maS9cMA8YMqgzDnF1v8iarDFnAuJNquR4Cg/640?wx_fmt=jpeg" alt=""></p><p>你好，我是findyi，毕业于华科、清华，在腾讯做过码农，在360做过技术总监，在独角兽公司做过技术VP，<a href="http://mp.weixin.qq.com/s?__biz=MzA3MzA5MTU4NA==&amp;mid=2247489765&amp;idx=2&amp;sn=b788f6fa006292813ffd57186732e7cb&amp;chksm=9f15078aa8628e9ce27f2ffd32ebb930a5b6c568a366c00b737012abf4fb2039740272741a8c&amp;scene=21#wechat_redirect" target="_blank" rel="noopener noreferrer"><strong>点击蓝字查看我的成长之路</strong>。<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><p>创业五年虽未获成功，但心中的小火苗一直还在燃烧，看尽南山&amp;西北旺的风光，但依然有着内心执着的追求。</p><p>目前我是一位大厂的业务负责人，同时，也是一位信奉终身成长的职场人。</p><p>同时，我也是知乎博主：findyi，日常分享高质量职场认知、技术干货欢迎围观。</p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/nice-article/jishuzongjianbeikaichuliao.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 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clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->技术总监被开除了....</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><span class="author-item">findyi</span></span><span property="author" content="findyi"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年5月29日</span><meta property="datePublished" content="2022-05-29T01:05:54.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category4" role>优质文章</li><meta property="articleSection" content="优质文章"></ul></span><!----><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 6 分钟</span><meta property="timeRequired" content="PT6M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><p>阅读本文大概需要6分钟。</p><p>昨天某nft公司公众号的一篇文章刷屏了，几小时就获得了几十万阅读。</p><p>这篇文章是这家公司的前任技术负责人写的，看得出来这哥们怨念很深：</p><p><img src="https://mmbiz.qpic.cn/mmbiz_jpg/ibDBKEpdfwEBq1EjG5gX3tVbz2WwJjKxAL7OZ6rRz6B1lwonvGU8cCeEu9OykTqEk4iarAriccO5FuQwBA5xb0CMQ/640?wx_fmt=jpeg" alt=""></p><p>40天赶出一个app但老板不满意，老板认为20天足够了，其实做过原生app开发的同学应该知道，这个速度还算比较快了。</p><p>并且火急火燎的上线导致bug不少，老板的应对方式不是谅解，而是开启无限攻击模式，最终把这个技术负责人和技术团队都给开了。</p><p>看完后感触良多，洋哥曾经也做过A/B轮公司CTO，也遇到过很多糟心的事情，一句话总结：技术负责人在不懂技术且不尊重技术的老板那，就是个夜壶。夜壶是什么？急的时候就是个宝贝，不急了就一脚踢开。</p><p>这是很多技术负责人的现状和无奈，经常也有技术总监朋友问洋哥诸如这样的问题：怎么样让老板知道开发时间不能再短了？</p><p>怎么样让老板理解技术人员薪资是比运营高的？怎么样让老板知道一天超过12个小时真的效率很低了？</p><p>讲真并没有什么办法，老板并不是不懂，而是故意装不懂。</p><p>最近甚至有一个“新物种”：“中华田园敏捷开发”</p><p>这玩意尤其在土老板那非常有市场：这个功能很不错、怎么实现我不管、“现在就要！”。</p><p>简单点说：中华田园敏捷开发的核心在于“快”，这种“快”是拍脑袋的快，基本由老板或业务负责人，又或者产品经理来决定上线时间，研发leader和码农无权干涉，甚至无权提意见。</p><p>如果提？轻则挨批，重则滚蛋！</p><p>在他们眼里，码农们甚至技术总监、CTO都是昂贵的耗材：LZ给你们这么多钱，养着你们、供着你们，让你明天上线居然做不到？那还要你们干啥，给我G。</p><p>那么除了能祝这样的公司早日倒闭，这样的老板早日破产，技术负责人们还能做什么呢？</p><p>简单给几点建议：</p><p><strong>1.打不过就加入</strong></p><p>技术负责人经常要面对老板、运营负责人、产品负责人等多维度的质疑和围攻毒打。</p><p>相信我，如果你不是天赋异禀那么只靠技术显然是打不过他们的。</p><p>但如果你即精通技术，恰好又懂一点点产品运营，那么事情就开始发生微妙的变化了。</p><p>这时候你是绝对的T型人才，能很轻松的找到技术-产品、技术-运营的效率最大化边界。同时因为你懂，所以也不会被忽悠被牵着鼻子走。</p><p><strong>2.学会其他岗位的“沟通语言”</strong></p><p>技术负责人需要和不同部门协调资源、推进合作、判断需求，有时候可能还要做跨公司的沟通。</p><p>有时候，技术人和其他部门的同事会有沟通困难的感觉，甚至相互都觉得对方不能理解自己，其实往往是沟通语言上出了问题。</p><p>技术人很容易陷入只说技术指标、技术特征、技术选型的陷阱。往往把对方讲得一头雾水还很自嗨，但这一刻沟通就已经失败了。</p><p>破解之道在于，和产品沟通就多说点技术提升对产品效用的影响，和运营沟通就多说点对用户ltv、转化率的帮助等等。</p><p><strong>3.不断降低老板的预期</strong></p><p>预期这玩意一旦被拉起来就降不下去，对于技术负责人来说降低老板预期非常重要。</p><p>尤其是面对不懂技术的老板，他只知道：你前几次都搞定了，这次肯定没问题。</p><p>这个时候就要提前预警，告知老板事情的风险点和困难度，不然出了成绩还可能被认为在偷奸耍滑。</p><p>有的朋友在面试的过程中就给老板拉满了预期：这些问题我入职后，统统解决。</p><p>入职后一开始还好，一些问题被解决了，哪一次没解决慢慢积累，老板的信任很快就不在了。</p><p>时刻谨记不要把话说满，宁愿超出预期给出惊喜，也不要承诺后给出惊吓。</p><p><strong>写在最后的话：</strong></p><p>以上三点真做到了，能显著增加技术负责人的生存周期。但很遗憾因为技术的底层属性：不直接创造业绩和收入，技术人在不成熟的管理体系中就是被当作耗材对待的，这一点无法撼动。</p><p>所以职场有个很奇怪的现象：各种CXO中CTO跳槽率是最频繁的，有时候真的是被逼的。</p><p>最后，祝每一个技术人都能被善待吧！</p><p>今天就写这么多了，我们下期见～</p><p><strong>其他原创：</strong></p><p><a href="http://mp.weixin.qq.com/s?__biz=MzA3MzA5MTU4NA==&amp;mid=2247503124&amp;idx=1&amp;sn=b76b916b5c152c93251a4d0a2381933e&amp;chksm=9f16d27ba8615b6df913c9334a44877707fa78fad5307195915eb3d16427ce5cc3d5436fb067&amp;scene=21#wechat_redirect" target="_blank" rel="noopener noreferrer">美国计算机高校YYDS?<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><p><a href="http://mp.weixin.qq.com/s?__biz=MzA3MzA5MTU4NA==&amp;mid=2247503020&amp;idx=1&amp;sn=a1fa09c4e98828497effe7575434ea5a&amp;chksm=9f16d3c3a8615ad5512f23b1a6b4cbeb9738bd34b2b94960094c3c61967272985d04aa6a3986&amp;scene=21#wechat_redirect" target="_blank" rel="noopener noreferrer">涨薪拖了两年了....<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><p><a href="http://mp.weixin.qq.com/s?__biz=MzA3MzA5MTU4NA==&amp;mid=2247502948&amp;idx=1&amp;sn=cfcf909f631c8c1958e9fce8ec6c6963&amp;chksm=9f16d30ba8615a1dec79c56eac90d825411513d18d9ca6353bae6585c81c03f9bb3111c68e1d&amp;scene=21#wechat_redirect" target="_blank" rel="noopener noreferrer">晋升阿里P7，真的难！<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><p><a href="http://mp.weixin.qq.com/s?__biz=MzA3MzA5MTU4NA==&amp;mid=2247502418&amp;idx=1&amp;sn=438a85f6dc66bafd7ca2ad5754852473&amp;chksm=9f16d53da8615c2bdb945192152eec56e2f8e2ac756b2db444862a0a9fcd9a34546975796061&amp;scene=21#wechat_redirect" target="_blank" rel="noopener noreferrer">上海交大本硕转码求职春招，0 offer！<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><p>PS:最近弄了一个新微信号，欢迎大家围观，洋哥是个不错的段子手、鸡汤大师：</p><h6 id="" tabindex="-1"><a class="header-anchor" href="#" aria-hidden="true">#</a> <img src="https://mmbiz.qpic.cn/mmbiz_png/ibDBKEpdfwEB360Zz7JnldNY0KWTziciaR8ztEcJzZqR51zkSQvqHjASCiamVsJlVydx8RV2DZYdndlr2Djiarn383Q/640?wx_fmt=png" alt=""></h6><p><img src="https://mmbiz.qpic.cn/mmbiz_jpg/ibDBKEpdfwEAvyxa3myBjNQeKlsX1uB3mmcpMQbSEBcAYJxaIAaH3maS9cMA8YMqgzDnF1v8iarDFnAuJNquR4Cg/640?wx_fmt=jpeg" alt=""></p><p>你好，我是findyi，毕业于华科、清华，在腾讯做过码农，在360做过技术总监，在独角兽公司做过技术VP，<a href="http://mp.weixin.qq.com/s?__biz=MzA3MzA5MTU4NA==&amp;mid=2247489765&amp;idx=2&amp;sn=b788f6fa006292813ffd57186732e7cb&amp;chksm=9f15078aa8628e9ce27f2ffd32ebb930a5b6c568a366c00b737012abf4fb2039740272741a8c&amp;scene=21#wechat_redirect" target="_blank" rel="noopener noreferrer"><strong>点击蓝字查看我的成长之路</strong>。<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><p>创业五年虽未获成功，但心中的小火苗一直还在燃烧，看尽南山&amp;西北旺的风光，但依然有着内心执着的追求。</p><p>目前我是一位大厂的业务负责人，同时，也是一位信奉终身成长的职场人。</p><p>同时，我也是知乎博主：findyi，日常分享高质量职场认知、技术干货欢迎围观。</p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/nice-article/jishuzongjianbeikaichuliao.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 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62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/29 上午9:05:54</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span><!--]--><!--]--></div></footer><!----><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 findyi</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!----></h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年6月10日</span><meta property="datePublished" content="2022-06-10T09:58:21.000Z"></span><!----><!----><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>小于 1 分钟</span><meta property="timeRequired" content="PT1M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><p>user www www; worker_processes auto; error_log /www/wwwlogs/nginx_error.log crit; pid /www/server/nginx/logs/nginx.pid; worker_rlimit_nofile 51200;</p><p>events { use epoll; worker_connections 51200; multi_accept on; }</p><p>http { include mime.types; #include luawaf.conf;</p><pre><code>    include proxy.conf;
+
+    default_type  application/octet-stream;
+
+    server_names_hash_bucket_size 512;
+    client_header_buffer_size 32k;
+    large_client_header_buffers 4 32k;
+    client_max_body_size 50m;
+
+    sendfile   on;
+    tcp_nopush on;
+
+    keepalive_timeout 60;
+
+    tcp_nodelay on;
+
+    fastcgi_connect_timeout 300;
+    fastcgi_send_timeout 300;
+    fastcgi_read_timeout 300;
+    fastcgi_buffer_size 64k;
+    fastcgi_buffers 4 64k;
+    fastcgi_busy_buffers_size 128k;
+    fastcgi_temp_file_write_size 256k;
+    fastcgi_intercept_errors on;
+
+    gzip on; # 开启Gzip
+    gzip_static on; # 开启静态文件压缩
+    gzip_min_length  1k; # 不压缩临界值，大于1K的才压缩
+    gzip_buffers     4 16k;
+    gzip_http_version 1.1;
+    gzip_comp_level 2;
+    gzip_types     text/plain application/javascript application/x-javascript text/javascript text/css application/xml;
+    gzip_vary on;
+    gzip_proxied   expired no-cache no-store private auth;
+    gzip_disable   &quot;MSIE [1-6]\.&quot;;
+
+    limit_conn_zone $binary_remote_addr zone=perip:10m;
+    limit_conn_zone $server_name zone=perserver:10m;
+
+    server_tokens off;
+    access_log off;
+    
+upstream codingmore_web_pool{
+    server 127.0.0.1:8081;
+}
+
+upstream codingmore_admin_pool{
+    server 127.0.0.1:9002;
+}
+
+server {
+    listen       80;
+    server_name  codingmore.top;
+    access_log /home/www/codingmore_web.log;
+    error_log /home/www/codingmore_web.error;
+
+    location /admin/ {
+        alias /www/wwwroot/itwanger/dist/; # 根目录
+        index index.html;
+    }
+
+    location /api/ {
+        proxy_set_header Host $host;
+        proxy_set_header X-Forwarded-For  $proxy_add_x_forwarded_for;
+        proxy_pass http://codingmore_admin_pool/;
+    }
+    
+    #将所有请求转发给pool池的应用处理
+    location / {
+        proxy_set_header Host $host;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_pass http://codingmore_web_pool;
+    }
+}
+
+server
+    {
+    listen 888;
+    server_name phpmyadmin;
+    index index.html index.htm index.php;
+    root  /www/server/phpmyadmin;
+        location ~ /tmp/ {
+            return 403;
+        }
+
+    #error_page   404   /404.html;
+    include enable-php.conf;
+
+    location ~ .*\.(gif|jpg|jpeg|png|bmp|swf)$
+    {
+        expires      30d;
+    }
+
+    location ~ .*\.(js|css)?$
+    {
+        expires      12h;
+    }
+
+    location ~ /\.
+    {
+        deny all;
+    }
+
+    access_log  /www/wwwlogs/access.log;
+}
+
+include /www/server/panel/vhost/nginx/*.conf;
+</code></pre><p>}</p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/nice-article/nginx-setting.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/6/10 下午5:58:21</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span><!--]--><!--]--></div></footer><!----><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
+    <script type="module" src="/assets/app.615e41d8.js" defer></script>
+  </body>
+</html>
diff --git a/dist/nice-article/weixin-bagwpdf.html b/dist/nice-article/weixin-bagwpdf.html
new file mode 100644
index 00000000..c28b1d7d
--- /dev/null
+++ b/dist/nice-article/weixin-bagwpdf.html
@@ -0,0 +1,48 @@
+<!DOCTYPE html>
+<html lang="zh-CN" data-theme="light">
+  <head>
+    <meta charset="utf-8" />
+    <meta name="viewport" content="width=device-width,initial-scale=1" />
+    <meta name="generator" content="VuePress 2.0.0-beta.46" />
+    <meta name="theme" content="VuePress Theme Hope" />
+    <meta property="og:url" content="https://tobebetterjavaer.com/nice-article/weixin-bagwpdf.html"><meta property="og:site_name" content="Java 程序员进阶之路"><meta property="og:title" content="👏下载→最全最硬核的Java面试 “备战” 资料"><meta property="og:type" content="article"><meta property="og:updated_time" content="2022-06-11T12:15:48.000Z"><meta property="og:locale" content="zh-CN"><meta property="article:tag" content="PDF"><meta property="article:modified_time" content="2022-06-11T12:15:48.000Z"><script>
+        var _hmt = _hmt || [];
+        (function() {
+          var hm = document.createElement("script");
+          hm.src = "https://hm.baidu.com/hm.js?5230ac143650bf5eb3c14f3fb9b1d3ec";
+          var s = document.getElementsByTagName("script")[0]; 
+          s.parentNode.insertBefore(hm, s);
+        })();
+      </script><link rel="stylesheet" href="//at.alicdn.com/t/font_3180624_7cy10l7jqqh.css"><link rel="icon" href="/favicon.ico"><link rel="icon" href="/assets/icon/chrome-mask-512.png" type="image/png" sizes="512x512"><link rel="icon" href="/assets/icon/chrome-mask-192.png" type="image/png" sizes="192x192"><link rel="icon" href="/assets/icon/chrome-512.png" type="image/png" sizes="512x512"><link rel="icon" href="/assets/icon/chrome-192.png" type="image/png" sizes="192x192"><link rel="manifest" href="/manifest.webmanifest" crossorigin="use-credentials"><meta name="theme-color" content="#46bd87"><link rel="apple-touch-icon" href="/assets/icon/apple-icon-152.png"><meta name="apple-mobile-web-app-capable" content="yes"><meta name="apple-mobile-web-app-status-bar-style" content="black"><meta name="msapplication-TileImage" content="/assets/icon/ms-icon-144.png"><meta name="msapplication-TileColor" content="#ffffff"><meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no, viewport-fit=cover"><title>👏下载→最全最硬核的Java面试 “备战” 资料 | Java 程序员进阶之路</title><meta name="description" content="一份通俗易懂、风趣幽默的Java学习指南，内容涵盖Java基础、Java并发编程、Java虚拟机、Java企业级开发、Java面试等核心知识点。学Java，就认准Java程序员进阶之路">
+    <style>
+      :root {
+        --bg-color: #fff;
+      }
+
+      html[data-theme="dark"] {
+        --bg-color: #1d2025;
+      }
+
+      html,
+      body {
+        background-color: var(--bg-color);
+      }
+    </style>
+    <script>
+      const userMode = localStorage.getItem("vuepress-theme-hope-scheme");
+      const systemDarkMode =
+        window.matchMedia &&
+        window.matchMedia("(prefers-color-scheme: dark)").matches;
+
+      if (userMode === "dark" || (userMode !== "light" && systemDarkMode)) {
+        document.querySelector("html").setAttribute("data-theme", "dark");
+      }
+    </script>
+    <link rel="stylesheet" href="/assets/style.aa7884a9.css">
+    <link rel="modulepreload" href="/assets/app.615e41d8.js"><link rel="modulepreload" href="/assets/weixin-bagwpdf.html.e485fe14.js"><link rel="modulepreload" href="/assets/plugin-vue_export-helper.21dcd24c.js"><link rel="modulepreload" href="/assets/weixin-bagwpdf.html.a32b4b3a.js">
+  </head>
+  <body>
+    <div id="app"><!--[--><!--[--><!--[--><span tabindex="-1"></span><a href="#main-content" class="skip-link sr-only">Skip to content</a><!--]--><div class="theme-container has-toc"><!--[--><!--[--><header class="navbar"><div class="navbar-left"><button class="toggle-sidebar-button" title="Toggle Sidebar"><span class="icon"></span></button><!----><a href="/" class="brand"><img class="logo" src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/logo-02.png" alt="Java 程序员进阶之路"><!----><span class="site-name hide-in-pad">Java 程序员进阶之路</span></a><!----></div><div class="navbar-center"><!----><nav class="nav-links"><div class="nav-item hide-in-mobile"><a href="/home.html" class="nav-link" aria-label="进阶之路"><span class="icon iconfont icon-lujing" style=""></span>进阶之路<!----></a></div><div class="nav-item hide-in-mobile"><a href="/zhishixingqiu/java-mianshi-zhinan.html" class="nav-link" aria-label="星球专栏"><span class="icon iconfont icon-Artboard" style=""></span>星球专栏<!----></a></div><div class="nav-item hide-in-mobile"><a href="/xuexiluxian/" class="nav-link" aria-label="学习路线"><span class="icon iconfont icon-luxian" style=""></span>学习路线<!----></a></div><div class="nav-item hide-in-mobile"><a href="https://space.bilibili.com/513340480" rel="noopener noreferrer" target="_blank" aria-label="B站视频" class="nav-link"><span class="icon iconfont icon-bzhan" style=""></span>B站视频<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="nav-item hide-in-mobile"><div class="dropdown-wrapper"><button class="dropdown-title" type="button" aria-label="珍藏资源"><span class="title"><span class="icon iconfont icon-youzhi" style=""></span>珍藏资源</span><span class="arrow"></span><ul class="nav-dropdown"><li class="dropdown-item"><a href="/download/java.html" class="nav-link" aria-label="Java电子书下载"><span class="icon iconfont icon-java" style=""></span>Java电子书下载<!----></a></li><li class="dropdown-item"><a href="/sidebar/sanfene/nixi.html" class="nav-link" aria-label="面渣逆袭"><span class="icon iconfont icon-zhunbei" style=""></span>面渣逆袭<!----></a></li><li class="dropdown-item"><a href="/download/nicearticle.html" class="nav-link" aria-label="优质文章"><span class="icon iconfont icon-youzhi" style=""></span>优质文章<!----></a></li><li class="dropdown-item"><a href="/download/history.html" class="nav-link" aria-label="网络日志"><span class="icon iconfont icon-rizhi" style=""></span>网络日志<!----></a></li><li class="dropdown-item"><a href="https://docsify.tobebetterjavaer.com/" rel="noopener noreferrer" target="_blank" aria-label="回到过去" class="nav-link"><span class="icon iconfont icon-fanhuijiuban" style=""></span>回到过去<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></li></ul></button></div></div></nav><!----></div><div class="navbar-right"><!----><div class="nav-item"><!----></div><div class="nav-item"><a class="repo-link" href="https://github.com/itwanger/toBeBetterJavaer" target="_blank" rel="noopener noreferrer"><svg xmlns="http://www.w3.org/2000/svg" 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33.578 90.454v135.85c0 13.142 7.936 27.606 32.854 22.87C862.25 912.597 1002.667 728.747 1002.667 512c0-271.019-219.648-490.667-490.71-490.667z"></path></svg></a></div><div class="nav-item hide-in-mobile"><button id="appearance-switch"><svg xmlns="http://www.w3.org/2000/svg" class="icon auto-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="auto icon" style="display:block;"><path d="M512 992C246.92 992 32 777.08 32 512S246.92 32 512 32s480 214.92 480 480-214.92 480-480 480zm0-840c-198.78 0-360 161.22-360 360 0 198.84 161.22 360 360 360s360-161.16 360-360c0-198.78-161.22-360-360-360zm0 660V212c165.72 0 300 134.34 300 300 0 165.72-134.28 300-300 300z"></path></svg><svg xmlns="http://www.w3.org/2000/svg" class="icon dark-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="dark icon" style="display:none;"><path d="M524.8 938.667h-4.267a439.893 439.893 0 0 1-313.173-134.4 446.293 446.293 0 0 1-11.093-597.334A432.213 432.213 0 0 1 366.933 90.027a42.667 42.667 0 0 1 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class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->👏下载→最全最硬核的Java面试 “备战” 资料</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年6月11日</span><meta property="datePublished" content="2022-06-11T12:15:48.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category2" role>学习资源</li><meta property="articleSection" content="学习资源"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag2" role>PDF</li></ul><meta property="keywords" content="PDF"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 2 分钟</span><meta property="timeRequired" content="PT2M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><p>大家好，我是二哥呀!分享一下今天整理汇总的一些 Java 面试相关的 PDF 资料，希望对需要的小伙伴有帮助！</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/weixin-bagwpdf-b411f6ba-0ac3-427f-b409-eade6fc8c98f.jpg" alt=""></p><p><strong>大家可以扫描下方的二维码发送关键字「<strong>00</strong>」获取下载链接。</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/weixin-bagwpdf-923def51-e371-4376-922e-ca1cead7cafa.jpg" alt=""></p><p><strong>也可以直接微信搜索「沉默王二」关注后回复【00】</strong></p><p><strong>1、《JavaGuide 面试突击最新版》</strong></p><p>Github 110k+ star 开源项目 JavaGuide 的面试版本，涵盖 Java 基础、Java 并发、JVM、计算机基础、数据库、常用框架（Spring、MyBatis、Netty 等等）、系统设计、大厂面经等内容。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/weixin-bagwpdf-f8b37afc-e992-4178-a4f4-0180c260cbf6.jpg" alt=""></p><p><strong>2、《Java 工程师进阶知识完全扫盲》</strong></p><p>Github 标星 58k+ star 开源项目的 PDF 版本，涵盖消息队列、搜索引擎、缓存、分库分表、读写分离、分布式事务、熔断限流、微服务等内容。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/weixin-bagwpdf-56268b0c-ab69-4b3d-84f8-b87e5c0a3eb3.jpg" alt=""></p><p><strong>3、《Java 面试资料》</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/weixin-bagwpdf-993c9095-0d9f-467b-81cc-d5593c9c913b.jpg" alt=""></p><p><strong>4、《分布式相关面试题汇总》</strong></p><p>这是一份专门讲分布式事务的文档，内容非常全面，一共 141 页，基本把分布式事务比较重要的知识点和面试题都概括到了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/weixin-bagwpdf-f146da20-7a6e-47d1-9127-c695c4d90ade.jpg" alt=""></p><p><strong><strong>5、《Java 八股文》113 道，背诵版</strong></strong></p><p><strong><strong>我总结出来的这份 Java 八股文，共计 113 道，包括 Java 基础、Java 并发编程、Java 虚拟机三大部分，全都是高频面试题，“吊打”面试官绝不是问题。</strong></strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/weixin-bagwpdf-3a052917-d818-4da8-9d85-f225e19b6afa.jpg" alt=""></p><p><strong>如何获取？</strong></p><p><strong>直接长按扫码关注下方二维码，回复 「<strong>00</strong>」 下载这10份 PDF 吧！</strong></p><p><img 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toc-link level3">项目背景</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-chengxwjdwzhqcgxm.html#小程序" class="router-link-active router-link-exact-active toc-link level3">小程序</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-chengxwjdwzhqcgxm.html#pc端" class="router-link-active router-link-exact-active toc-link level3">PC端</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-chengxwjdwzhqcgxm.html#硬件部分-取餐柜" class="router-link-active router-link-exact-active toc-link level3">硬件部分（取餐柜）</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-chengxwjdwzhqcgxm.html#取餐接口-取餐柜" class="router-link-active router-link-exact-active toc-link level3">取餐接口（取餐柜）</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-chengxwjdwzhqcgxm.html#创建存餐订单" class="router-link-active router-link-exact-active toc-link level2">创建存餐订单</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><blockquote><p>本文章来自程序汪背后的私活小团队，开发智慧取餐柜的项目，本项目非常类似快递柜项目，本项目的完整解决方案跟大家分享一下，希望给大家一些参考</p></blockquote><p>B站 我是程序汪 点最下方原文链接进入</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFHAz8cYz4nxib6fiaVyr4cEVgDJsm6p8rWf2WwKMejdDibU97WWSP2ibjMROehjQ7ZORHgLe4btWgSLCQ/640?wx_fmt=png" alt=""></p><p>这是取餐柜成品的样子，硬件厂家提供的不用程序汪去开发硬件哦，我们只开发的软件部分（小程序，PC端，APP）</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFHibEAuDnfCldrtP18icV44r5n9ibibzplAZnDty7BFzez2nsadjRmJwuWyQDq2LhqcAxIdKnmAGnfQsQ/640?wx_fmt=png" alt=""></p><p>下面是厂家快递过来的测试机器4口，别问我为什么跟上面的不一样，上面的那个实在太大了啊，测试联调只要接口OK就行</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFFcWw27h9hPibsicUqAKd4LZbmqJNCVyaRFkuzeNlpVU5Ilibz0pLibBicOiaib5lqwMYsNtbvzwJGjWN4Jw/640?wx_fmt=png" alt=""></p><p>流程图先晒下，画的很简单</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFEt0wOnP0Enbp9AJgodVaibBoDyqxQqicPzB41LU5tVdLf4a68W4pHdTUxGTCQ8IvNFHwiaclniaA16og/640?wx_fmt=png" alt=""></p><p>B站【我是程序汪】</p><p>现在开发项目都喜欢前面加个智慧，程序汪的这个项目也是智慧XXX</p><p>说白了就是一个外卖项目的升级版本</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFGr3zqU7QvZk780ticsnSpDFak6cBDI1dPvJWMjOZoEPUIeFcXFV4bQtVicrhiczhOf14rNHshTILh5A/640?wx_fmt=png" alt=""></p><p>这图是用processon画的</p><h3 id="开发人员情况-1人" tabindex="-1"><a class="header-anchor" href="#开发人员情况-1人" aria-hidden="true">#</a> 开发人员情况（1人）</h3><ul><li><p>uniapp 前端 技术栈 vue 主要任务 小程序及PC端页面,APP (存取 餐)</p></li><li><p>后端   技术栈  springboot</p></li><li><p>开发周期40天（设计+开发）</p></li><li><p>开发人数 1人</p></li><li><p>整体费用是8万(不含硬件部分)，这是一期的开发费用</p></li><li><p>付款模式 5:4:1 首付：验收：尾款</p></li><li><p>走的正规公司合同</p></li><li><p>云服务器1台 4核8G，经费有限先就安排1台，不够后面升级</p></li><li><p>维护费用 项目总款项10%</p></li><li><p>售后维护 | 域名 | 服务器 | 日常运维 |</p></li></ul><h2 id="技术选型" tabindex="-1"><a class="header-anchor" href="#技术选型" aria-hidden="true">#</a> 技术选型</h2><ul><li>核心框架：Spring Boot</li><li>数据库连接池：Druid</li><li>缓存：redis</li><li>前端：Vue</li><li>APP 小程序 Uniapp</li><li>数据库：mysql</li><li>服务器配置 4核8G</li><li>硬件接口开发联调（云打印机 取餐柜）</li></ul><h3 id="项目背景" tabindex="-1"><a class="header-anchor" href="#项目背景" aria-hidden="true">#</a> 项目背景</h3><p>大城市里公司上班族，经常交通通勤都1个多小时，购买早餐也经常需要排很长的队，很浪费时间，本系统就是为了解决上班族购买早餐难的痛点而诞生的。程序汪上海上班时，吃早餐就很头疼，办公大厦楼下早餐店排队很夸张的，浪费了我很多写代码的时间呀。</p><h3 id="小程序" tabindex="-1"><a class="header-anchor" href="#小程序" aria-hidden="true">#</a> 小程序</h3><p>程序汪把核心页面截图出来</p><p>本小程序主要功能就这些</p><ul><li>用户下订单</li><li>骑手存餐</li></ul><p>下面是我们的测试体验版小程序，初始数据有点随意</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFEt0wOnP0Enbp9AJgodVaibB2ibwBZgXfa6k9TwI37ia4E0SaWbXbvPutxrDzURXydvEOEKkWsAW58kw/640?wx_fmt=png" alt=""></p><p>跟普通下单外卖不同的地方就是可以选择取餐时间和机柜</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFEt0wOnP0Enbp9AJgodVaibBMLDjM4lgYbDcNyEmMGyQHYqzOuyHc1K1XO8k0nEmNVakDvSn0JFbTA/640?wx_fmt=png" alt=""></p><p>骑手进入本页面点击【存餐】触发 取餐柜</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFHibEAuDnfCldrtP18icV44r5tE22SgKjh78qLaQP5efibuEvAnxu9DormqCCIxfDy0LAJMJQgrKduRQ/640?wx_fmt=png" alt=""></p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFEt0wOnP0Enbp9AJgodVaibBjoNWhyhxT76lF4R7BpY59jMYMEBUUC05LTeeTPibCFzMtWQ5OUibziafQ/640?wx_fmt=png" alt=""></p><p>下单成功会短信通知用户 取餐码</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFEt0wOnP0Enbp9AJgodVaibBBMSWohkMMPL4sWMkkogZSOGVia3Gj9uYPgODym0RMj4f1PFOTWyicibOQ/640?wx_fmt=png" alt=""></p><h3 id="pc端" tabindex="-1"><a class="header-anchor" href="#pc端" aria-hidden="true">#</a> PC端</h3><p>目前主要功能，说白了在外卖系统二开的，分系统管理员和商家角色</p><ul><li><p>商品管理 -分系统和商家</p></li><li><p>订单管理   -分系统和商家</p></li><li><p>店铺管理   -分系统和商家</p></li><li><p>会员权限管理</p></li><li><p>售后管理</p></li><li><p>统计报表</p></li><li><p>订单物流</p></li><li><p>财务管理</p></li><li><p>骑手管理</p></li><li></li></ul><p>下面截图就是开源系统上面二开的，别问我为啥管理系统页面都长了差不多，前端是Vue</p><p>系统管理员角色</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFEt0wOnP0Enbp9AJgodVaibBcWRDlxnmCsF1Zl6AzPf4kIqicSxHh9z9zick9Ocz1kPDlm1wO09421Kw/640?wx_fmt=png" alt=""></p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFEt0wOnP0Enbp9AJgodVaibBRphhn1htCwzpfjrMNCwJregXequUibCMbgaHr0nvicuV5vj80qaQ8kwg/640?wx_fmt=png" alt=""></p><p>商家角色<img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFEt0wOnP0Enbp9AJgodVaibB2lz1EHN1AxQVoVScgmAibBoMuwBp39XRFaZnWQruXrj5HsmoQ9TPjDQ/640?wx_fmt=png" alt=""></p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFEt0wOnP0Enbp9AJgodVaibBokgic1Lv6Z7xlabe8vice0PiaIhHd8xIcZcar3ADgvjibQqn67ydia7yVbA/640?wx_fmt=png" alt=""></p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFEt0wOnP0Enbp9AJgodVaibBOBRBKsyDXGL96F4qZUmQpaKR2f0aaTP6MeFEp6s8ibicRVZWC21wX4og/640?wx_fmt=png" alt=""></p><h3 id="硬件部分-取餐柜" tabindex="-1"><a class="header-anchor" href="#硬件部分-取餐柜" aria-hidden="true">#</a> 硬件部分（取餐柜）</h3><p>主要硬件是取餐柜，这个是找的第三方现成的硬件厂家，对方会提供接口文档具体的SDK包，我们的工作量就是接口开发然后联调一波。</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFFcWw27h9hPibsicUqAKd4LZbmqJNCVyaRFkuzeNlpVU5Ilibz0pLibBicOiaib5lqwMYsNtbvzwJGjWN4Jw/640?wx_fmt=png" alt=""></p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFEt0wOnP0Enbp9AJgodVaibBxZEJAQqOYUiaicXwc6BK6bgRg77abDZcibfRePicTyLnia38OJDNFgWPBKA/640?wx_fmt=png" alt=""></p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFEt0wOnP0Enbp9AJgodVaibBPh1EPibIGGgDSricr9O4qBObltaJr3T0Z71b5l9IlvAdE8cVr99gBWpQ/640?wx_fmt=png" alt=""></p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFEt0wOnP0Enbp9AJgodVaibBEqZMXAMMucCo9yNL3RhoPdT3oZW4ZYvjopEfqVNGOwcdYy4XDqRHNw/640?wx_fmt=png" alt=""></p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFEt0wOnP0Enbp9AJgodVaibBWaicZkZibibwGcBwNpKtJybNTBvzhFJJGj1C3WFkJuTLuuZHBicg9hKCaw/640?wx_fmt=png" alt=""></p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFEt0wOnP0Enbp9AJgodVaibBU9kBPeyw7ab59qqlHVsxLQZVPhoUVhoxJicDRycJfWjOIfibBEicLEBbQ/640?wx_fmt=png" alt=""></p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFEt0wOnP0Enbp9AJgodVaibBmbryv7W2USucwN1DBKbDAgO358AVaeqzTrAZ5EzOTfJNv2qz8UiaOhQ/640?wx_fmt=png" alt=""></p><h3 id="取餐接口-取餐柜" tabindex="-1"><a class="header-anchor" href="#取餐接口-取餐柜" aria-hidden="true">#</a> 取餐接口（取餐柜）</h3><p>下面我把核心的存餐接口给大家列出来下</p><h2 id="创建存餐订单" tabindex="-1"><a class="header-anchor" href="#创建存餐订单" aria-hidden="true">#</a> 创建存餐订单</h2><p><strong>使用场景</strong></p><p>创建存餐订单</p><p><strong>操作名称</strong></p><p>createOrder</p><p><strong>请求字段</strong></p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>{  
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6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><span class="author-item">程序汪</span></span><span property="author" content="程序汪"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 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class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-chengxwjdwzhqcgxm.html#开发人员情况-1人" class="router-link-active router-link-exact-active toc-link level3">开发人员情况（1人）</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-chengxwjdwzhqcgxm.html#技术选型" class="router-link-active router-link-exact-active toc-link level2">技术选型</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-chengxwjdwzhqcgxm.html#项目背景" class="router-link-active router-link-exact-active toc-link level3">项目背景</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-chengxwjdwzhqcgxm.html#小程序" class="router-link-active router-link-exact-active toc-link level3">小程序</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-chengxwjdwzhqcgxm.html#pc端" class="router-link-active router-link-exact-active toc-link level3">PC端</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-chengxwjdwzhqcgxm.html#硬件部分-取餐柜" class="router-link-active router-link-exact-active toc-link level3">硬件部分（取餐柜）</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-chengxwjdwzhqcgxm.html#取餐接口-取餐柜" class="router-link-active router-link-exact-active toc-link level3">取餐接口（取餐柜）</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-chengxwjdwzhqcgxm.html#创建存餐订单" class="router-link-active router-link-exact-active toc-link level2">创建存餐订单</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><blockquote><p>本文章来自程序汪背后的私活小团队，开发智慧取餐柜的项目，本项目非常类似快递柜项目，本项目的完整解决方案跟大家分享一下，希望给大家一些参考</p></blockquote><p>B站 我是程序汪 点最下方原文链接进入</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFHAz8cYz4nxib6fiaVyr4cEVgDJsm6p8rWf2WwKMejdDibU97WWSP2ibjMROehjQ7ZORHgLe4btWgSLCQ/640?wx_fmt=png" alt=""></p><p>这是取餐柜成品的样子，硬件厂家提供的不用程序汪去开发硬件哦，我们只开发的软件部分（小程序，PC端，APP）</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFHibEAuDnfCldrtP18icV44r5n9ibibzplAZnDty7BFzez2nsadjRmJwuWyQDq2LhqcAxIdKnmAGnfQsQ/640?wx_fmt=png" alt=""></p><p>下面是厂家快递过来的测试机器4口，别问我为什么跟上面的不一样，上面的那个实在太大了啊，测试联调只要接口OK就行</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFFcWw27h9hPibsicUqAKd4LZbmqJNCVyaRFkuzeNlpVU5Ilibz0pLibBicOiaib5lqwMYsNtbvzwJGjWN4Jw/640?wx_fmt=png" alt=""></p><p>流程图先晒下，画的很简单</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFEt0wOnP0Enbp9AJgodVaibBoDyqxQqicPzB41LU5tVdLf4a68W4pHdTUxGTCQ8IvNFHwiaclniaA16og/640?wx_fmt=png" alt=""></p><p>B站【我是程序汪】</p><p>现在开发项目都喜欢前面加个智慧，程序汪的这个项目也是智慧XXX</p><p>说白了就是一个外卖项目的升级版本</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFGr3zqU7QvZk780ticsnSpDFak6cBDI1dPvJWMjOZoEPUIeFcXFV4bQtVicrhiczhOf14rNHshTILh5A/640?wx_fmt=png" alt=""></p><p>这图是用processon画的</p><h3 id="开发人员情况-1人" tabindex="-1"><a class="header-anchor" href="#开发人员情况-1人" aria-hidden="true">#</a> 开发人员情况（1人）</h3><ul><li><p>uniapp 前端 技术栈 vue 主要任务 小程序及PC端页面,APP (存取 餐)</p></li><li><p>后端   技术栈  springboot</p></li><li><p>开发周期40天（设计+开发）</p></li><li><p>开发人数 1人</p></li><li><p>整体费用是8万(不含硬件部分)，这是一期的开发费用</p></li><li><p>付款模式 5:4:1 首付：验收：尾款</p></li><li><p>走的正规公司合同</p></li><li><p>云服务器1台 4核8G，经费有限先就安排1台，不够后面升级</p></li><li><p>维护费用 项目总款项10%</p></li><li><p>售后维护 | 域名 | 服务器 | 日常运维 |</p></li></ul><h2 id="技术选型" tabindex="-1"><a class="header-anchor" href="#技术选型" aria-hidden="true">#</a> 技术选型</h2><ul><li>核心框架：Spring Boot</li><li>数据库连接池：Druid</li><li>缓存：redis</li><li>前端：Vue</li><li>APP 小程序 Uniapp</li><li>数据库：mysql</li><li>服务器配置 4核8G</li><li>硬件接口开发联调（云打印机 取餐柜）</li></ul><h3 id="项目背景" tabindex="-1"><a class="header-anchor" href="#项目背景" aria-hidden="true">#</a> 项目背景</h3><p>大城市里公司上班族，经常交通通勤都1个多小时，购买早餐也经常需要排很长的队，很浪费时间，本系统就是为了解决上班族购买早餐难的痛点而诞生的。程序汪上海上班时，吃早餐就很头疼，办公大厦楼下早餐店排队很夸张的，浪费了我很多写代码的时间呀。</p><h3 id="小程序" tabindex="-1"><a class="header-anchor" href="#小程序" aria-hidden="true">#</a> 小程序</h3><p>程序汪把核心页面截图出来</p><p>本小程序主要功能就这些</p><ul><li>用户下订单</li><li>骑手存餐</li></ul><p>下面是我们的测试体验版小程序，初始数据有点随意</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFEt0wOnP0Enbp9AJgodVaibB2ibwBZgXfa6k9TwI37ia4E0SaWbXbvPutxrDzURXydvEOEKkWsAW58kw/640?wx_fmt=png" alt=""></p><p>跟普通下单外卖不同的地方就是可以选择取餐时间和机柜</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFEt0wOnP0Enbp9AJgodVaibBMLDjM4lgYbDcNyEmMGyQHYqzOuyHc1K1XO8k0nEmNVakDvSn0JFbTA/640?wx_fmt=png" alt=""></p><p>骑手进入本页面点击【存餐】触发 取餐柜</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFHibEAuDnfCldrtP18icV44r5tE22SgKjh78qLaQP5efibuEvAnxu9DormqCCIxfDy0LAJMJQgrKduRQ/640?wx_fmt=png" alt=""></p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFEt0wOnP0Enbp9AJgodVaibBjoNWhyhxT76lF4R7BpY59jMYMEBUUC05LTeeTPibCFzMtWQ5OUibziafQ/640?wx_fmt=png" alt=""></p><p>下单成功会短信通知用户 取餐码</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFEt0wOnP0Enbp9AJgodVaibBBMSWohkMMPL4sWMkkogZSOGVia3Gj9uYPgODym0RMj4f1PFOTWyicibOQ/640?wx_fmt=png" alt=""></p><h3 id="pc端" tabindex="-1"><a class="header-anchor" href="#pc端" aria-hidden="true">#</a> PC端</h3><p>目前主要功能，说白了在外卖系统二开的，分系统管理员和商家角色</p><ul><li><p>商品管理 -分系统和商家</p></li><li><p>订单管理   -分系统和商家</p></li><li><p>店铺管理   -分系统和商家</p></li><li><p>会员权限管理</p></li><li><p>售后管理</p></li><li><p>统计报表</p></li><li><p>订单物流</p></li><li><p>财务管理</p></li><li><p>骑手管理</p></li><li></li></ul><p>下面截图就是开源系统上面二开的，别问我为啥管理系统页面都长了差不多，前端是Vue</p><p>系统管理员角色</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFEt0wOnP0Enbp9AJgodVaibBcWRDlxnmCsF1Zl6AzPf4kIqicSxHh9z9zick9Ocz1kPDlm1wO09421Kw/640?wx_fmt=png" alt=""></p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFEt0wOnP0Enbp9AJgodVaibBRphhn1htCwzpfjrMNCwJregXequUibCMbgaHr0nvicuV5vj80qaQ8kwg/640?wx_fmt=png" alt=""></p><p>商家角色<img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFEt0wOnP0Enbp9AJgodVaibB2lz1EHN1AxQVoVScgmAibBoMuwBp39XRFaZnWQruXrj5HsmoQ9TPjDQ/640?wx_fmt=png" alt=""></p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFEt0wOnP0Enbp9AJgodVaibBokgic1Lv6Z7xlabe8vice0PiaIhHd8xIcZcar3ADgvjibQqn67ydia7yVbA/640?wx_fmt=png" alt=""></p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFEt0wOnP0Enbp9AJgodVaibBOBRBKsyDXGL96F4qZUmQpaKR2f0aaTP6MeFEp6s8ibicRVZWC21wX4og/640?wx_fmt=png" alt=""></p><h3 id="硬件部分-取餐柜" tabindex="-1"><a class="header-anchor" href="#硬件部分-取餐柜" aria-hidden="true">#</a> 硬件部分（取餐柜）</h3><p>主要硬件是取餐柜，这个是找的第三方现成的硬件厂家，对方会提供接口文档具体的SDK包，我们的工作量就是接口开发然后联调一波。</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFFcWw27h9hPibsicUqAKd4LZbmqJNCVyaRFkuzeNlpVU5Ilibz0pLibBicOiaib5lqwMYsNtbvzwJGjWN4Jw/640?wx_fmt=png" alt=""></p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFEt0wOnP0Enbp9AJgodVaibBxZEJAQqOYUiaicXwc6BK6bgRg77abDZcibfRePicTyLnia38OJDNFgWPBKA/640?wx_fmt=png" alt=""></p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFEt0wOnP0Enbp9AJgodVaibBPh1EPibIGGgDSricr9O4qBObltaJr3T0Z71b5l9IlvAdE8cVr99gBWpQ/640?wx_fmt=png" alt=""></p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFEt0wOnP0Enbp9AJgodVaibBEqZMXAMMucCo9yNL3RhoPdT3oZW4ZYvjopEfqVNGOwcdYy4XDqRHNw/640?wx_fmt=png" alt=""></p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFEt0wOnP0Enbp9AJgodVaibBWaicZkZibibwGcBwNpKtJybNTBvzhFJJGj1C3WFkJuTLuuZHBicg9hKCaw/640?wx_fmt=png" alt=""></p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFEt0wOnP0Enbp9AJgodVaibBU9kBPeyw7ab59qqlHVsxLQZVPhoUVhoxJicDRycJfWjOIfibBEicLEBbQ/640?wx_fmt=png" alt=""></p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/obDoO79MTFEt0wOnP0Enbp9AJgodVaibBmbryv7W2USucwN1DBKbDAgO358AVaeqzTrAZ5EzOTfJNv2qz8UiaOhQ/640?wx_fmt=png" alt=""></p><h3 id="取餐接口-取餐柜" tabindex="-1"><a class="header-anchor" href="#取餐接口-取餐柜" aria-hidden="true">#</a> 取餐接口（取餐柜）</h3><p>下面我把核心的存餐接口给大家列出来下</p><h2 id="创建存餐订单" tabindex="-1"><a class="header-anchor" href="#创建存餐订单" aria-hidden="true">#</a> 创建存餐订单</h2><p><strong>使用场景</strong></p><p>创建存餐订单</p><p><strong>操作名称</strong></p><p>createOrder</p><p><strong>请求字段</strong></p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>{  
 
     &quot;deviceId&quot;:&quot;xxxxxxxxxxx&quot;,   // 必传，设备ID  
 
@@ -186,6 +186,6 @@ timestamp|int|当前服务器时间戳(10位)|是|
 **▲**回复「****743****」**▲**
 
 **点下方原文链接观看B站视频版本**</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/nice-article/weixin-chengxwjdwzhqcgxm.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/6/8 上午10:10:51</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span><!--]--><!--]--></div></footer><!----><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 程序汪</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->👏下载→GitHub星标115k+的Java教程</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年6月11日</span><meta property="datePublished" content="2022-06-11T12:15:48.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category2" role>学习资源</li><meta property="articleSection" content="学习资源"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag2" role>PDF</li></ul><meta property="keywords" content="PDF"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 1 分钟</span><meta property="timeRequired" content="PT1M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><p>学 Java 其实不难，重要的是找到好的学习资料和学习方法，然后就是付诸实践。</p><p>我不太建议大家一上来就阅读《Java 核心技术卷》这些书，因为书太厚，对于初学者来说不是特别友好，如果没耐心可能就直接劝退了。我也不太建议大家一上来就去看视频，因为视频一般比较啰嗦，抓不住重点。</p><p><strong>大家先看看我整理的这份 GitHub 上星标 115k+ 的 Java 教程，里面涵盖了 Java 所有的知识点，包括 Java 语法、Java 集合框架、Java IO、Java 并发编程和 Java 虚拟机，内容不多，只讲重点</strong>。</p><p><strong>可以扫描下方的二维码发送关键字「<strong>001</strong>」获取下载链接。</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/weixin-githubxbkdjavajccjyh-15bfca54-eda2-481f-b0d9-1cfbfd946c58.jpg" alt=""></p><p><strong>也可以直接微信搜索「沉默王二」关注后回复【001】</strong></p><p>来看一下目录吧！</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/weixin-githubxbkdjavajccjyh-26a35c09-2724-4c70-8001-efdfc3a62f25.jpg" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/weixin-githubxbkdjavajccjyh-8ec9715c-8a43-44d8-a546-060cac4025eb.jpg" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/weixin-githubxbkdjavajccjyh-31800094-0b88-42d8-a620-deabe7150e19.jpg" alt=""></p><p>为了整理这份 PDF，我可是费了老大劲，希望大家能珍惜。目前这份 PDF 已经放在百度网盘上，下载数量有三万一千多次，说明得到了很多人的认同。</p><p><strong>可以微信搜索「<strong>沉默王二</strong>」或者扫描下面的二维码关注后回复「<strong>001</strong>」关键字拉取离线版 PDF 的下载地址。</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/weixin-githubxbkdjavajccjyh-15bfca54-eda2-481f-b0d9-1cfbfd946c58.jpg" alt=""></p><p>GitHub 地址我也贴一下：</p><blockquote><p><a href="https://github.com/CyC2018/CS-Notes" target="_blank" rel="noopener noreferrer">https://github.com/CyC2018/CS-Notes<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span 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xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><span class="author-item">楼仔</span></span><span property="author" content="楼仔"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 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145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 11 分钟</span><meta property="timeRequired" content="PT11M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-liaoliaoxianliu.html#计数器" class="router-link-active router-link-exact-active toc-link level2">计数器</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-liaoliaoxianliu.html#滑动窗口" class="router-link-active router-link-exact-active toc-link level2">滑动窗口</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-liaoliaoxianliu.html#漏桶" class="router-link-active router-link-exact-active toc-link level2">漏桶</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-liaoliaoxianliu.html#令牌桶" class="router-link-active router-link-exact-active toc-link level2">令牌桶</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-liaoliaoxianliu.html#redis-lua-分布式限流" class="router-link-active router-link-exact-active toc-link level2">Redis + Lua 分布式限流</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-liaoliaoxianliu.html#聊聊其它" class="router-link-active router-link-exact-active toc-link level2">聊聊其它</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><p><img src="https://mmbiz.qpic.cn/mmbiz_png/sXFqMxQoVLHVUYY15MYFpF1D5fDtiao11aXGgPFfcnNQpjThJUd2dxQnHwzDjRynia0ziaeMYr7tbQxkIfChlAicTg/640?wx_fmt=png" alt=""></p><p>大家好，我是楼仔！</p><p>在电商高并发场景下，我们经常会使用一些常用方法，去应对流量高峰，比如<strong>限流、熔断、降级</strong>，今天我们聊聊限流。</p><p>什么是限流呢？限流是限制到达系统的并发请求数量，保证系统能够正常响应部分用户请求，而对于超过限制的流量，则通过拒绝服务的方式保证整体系统的可用性。</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/sXFqMxQoVLHVUYY15MYFpF1D5fDtiao11SePQJZST6bL83CTafTCXICicdY5y66tomZ9Pmy8ibytiaWoLPyOWIwytQ/640?wx_fmt=png" alt=""></p><p>根据限流作用范围，可以分为<strong>单机限流和分布式限流</strong>；根据限流方式，又分为<strong>计数器、滑动窗口、漏桶和令牌桶限流</strong>，下面我们对这块详细进行讲解。</p><blockquote><p>文章大部分内容参考  TPaper 的<a href="https://mp.weixin.qq.com/s?__biz=MzI3MzQwNjcyNg==&amp;mid=2247485144&amp;idx=1&amp;sn=ebc4bddf53ba5dd01943f0e1b1d452fa&amp;chksm=eb2288b1dc5501a77a2108b2e439f35d09018a8b8d67b664126821bc18dc3df3272cb63dcf6e&amp;token=854767795&amp;lang=zh_CN&amp;scene=21#wechat_redirect" target="_blank" rel="noopener noreferrer">《Go 实现各类限流算法》<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，特此说明！</p></blockquote><h1 id="常用限流方式" tabindex="-1"><a class="header-anchor" href="#常用限流方式" aria-hidden="true">#</a> 常用限流方式</h1><h2 id="计数器" tabindex="-1"><a class="header-anchor" href="#计数器" aria-hidden="true">#</a> 计数器</h2><p>计数器是一种最简单限流算法，其原理就是：在一段时间间隔内，对请求进行计数，与阀值进行比较判断是否需要限流，一旦到了时间临界点，将计数器清零。</p><p>这个就像你去坐车一样，车厢规定了多少个位置，满了就不让上车了，不然就是超载了，被交警叔叔抓到了就要罚款的，如果我们的系统那就不是罚款的事情了，可能直接崩掉了。</p><p>程序执行逻辑：</p><ul><li>可以在程序中设置一个变量 count，当过来一个请求我就将这个数 +1，同时记录请求时间。</li><li>当下一个请求来的时候判断 count 的计数值是否超过设定的频次，以及当前请求的时间和第一次请求时间是否在 1 分钟内。</li><li>如果在 1 分钟内并且超过设定的频次则证明请求过多，后面的请求就拒绝掉。</li><li>如果该请求与第一个请求的间隔时间大于计数周期，且 count 值还在限流范围内，就重置 count。</li></ul><p>那么问题来了，如果有个需求对于某个接口 /query 每分钟最多允许访问 200 次，假设有个用户在第 59 秒的最后几毫秒瞬间发送 200 个请求，当 59 秒结束后 Counter 清零了，他在下一秒的时候又发送 200 个请求。</p><p>那么在 1 秒钟内这个用户发送了 2 倍的请求，这个是符合我们的设计逻辑的，这也是计数器方法的设计缺陷，系统可能会承受恶意用户的大量请求，甚至击穿系统。<strong>这种方法虽然简单，但也有个大问题就是没有很好的处理单位时间的边界。</strong></p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/sXFqMxQoVLHVUYY15MYFpF1D5fDtiao11VLPh0WuiaSUMmcNOiaYDksmxA9TqRZnv4IedWP2scGicHdict68U1lfd5Q/640?wx_fmt=png" alt=""></p><p>不过说实话，这个计数引用了锁，在高并发场景，这个方式可能不太实用，我建议将锁去掉，然后将 l.count++ 的逻辑通过原子计数处理，这样就可以保证 l.count 自增时不会被多个线程同时执行，<strong>即通过原子计数的方式实现限流。</strong></p><blockquote><p>为了不影响阅读，代码详见：https://github.com/lml200701158/go_demo/blob/master/current_limit/count.go</p></blockquote><h2 id="滑动窗口" tabindex="-1"><a class="header-anchor" href="#滑动窗口" aria-hidden="true">#</a> 滑动窗口</h2><p>滑动窗口是针对计数器存在的临界点缺陷，所谓滑动窗口（Sliding window）是一种流量控制技术，这个词出现在 TCP 协议中。滑动窗口把固定时间片进行划分，并且随着时间的流逝，进行移动，固定数量的可以移动的格子，进行计数并判断阀值。</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/sXFqMxQoVLHVUYY15MYFpF1D5fDtiao11JkTOP1RcxEScGNVtu1iaHKMjkZftZMZAS5UyFk7ULtZsjsMMbmqUoEw/640?wx_fmt=png" alt=""></p><p>上图中我们用红色的虚线代表一个时间窗口（一分钟），每个时间窗口有 6 个格子，每个格子是 10 秒钟。每过 10 秒钟时间窗口向右移动一格，可以看红色箭头的方向。我们为每个格子都设置一个独立的计数器 Counter，假如一个请求在 0:45 访问了那么我们将第五个格子的计数器 +1（也是就是 0:40~0:50），在判断限流的时候需要把所有格子的计数加起来和设定的频次进行比较即可。</p><p>那么滑动窗口如何解决我们上面遇到的问题呢？来看下面的图：</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/sXFqMxQoVLHVUYY15MYFpF1D5fDtiao117EDRACZWlicN0CrozU4omsVR8aHXeEsib3JhER7Y01t8SvKCicviaLXxgg/640?wx_fmt=png" alt=""></p><p>当用户在 0:59 秒钟发送了 200 个请求就会被第六个格子的计数器记录 +200，当下一秒的时候时间窗口向右移动了一个，此时计数器已经记录了该用户发送的 200 个请求，所以再发送的话就会触发限流，则拒绝新的请求。</p><p>其实计数器就是滑动窗口啊，只不过只有一个格子而已，所以想让限流做的更精确只需要划分更多的格子就可以了，为了更精确我们也不知道到底该设置多少个格子，<strong>格子的数量影响着滑动窗口算法的精度，依然有时间片的概念，无法根本解决临界点问题。</strong></p><blockquote><p>为了不影响阅读，代码详见：https://github.com/RussellLuo/slidingwindow</p></blockquote><h2 id="漏桶" tabindex="-1"><a class="header-anchor" href="#漏桶" aria-hidden="true">#</a> 漏桶</h2><p>漏桶算法（Leaky Bucket），原理就是一个固定容量的漏桶，按照固定速率流出水滴。</p><p>用过水龙头都知道，打开龙头开关水就会流下滴到水桶里，而漏桶指的是水桶下面有个漏洞可以出水,如果水龙头开的特别大那么水流速就会过大，这样就可能导致水桶的水满了然后溢出。</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/sXFqMxQoVLHVUYY15MYFpF1D5fDtiao11ic3Ly4IDNcADnCGUfsicicslXf2PR9ARDtasyFpVeUib2cuKsOZSiaxSqdw/640?wx_fmt=png" alt=""></p><blockquote><p>图片如果看不清，可单击图片并放大。</p></blockquote><p>一个固定容量的桶，有水流进来，也有水流出去。对于流进来的水来说，我们无法预计一共有多少水会流进来，也无法预计水流的速度。但是对于流出去的水来说，这个桶可以固定水流出的速率（处理速度），从而达到流量整形和流量控制的效果。</p><p>漏桶算法有以下特点：</p><ul><li>漏桶具有固定容量，出水速率是固定常量（流出请求）</li><li>如果桶是空的，则不需流出水滴</li><li>可以以任意速率流入水滴到漏桶（流入请求）</li><li>如果流入水滴超出了桶的容量，则流入的水滴溢出（新请求被拒绝）</li></ul><p>漏桶限制的是常量流出速率（即流出速率是一个固定常量值），<strong>所以最大的速率就是出水的速率，不能出现突发流量。</strong></p><blockquote><p>为了不影响阅读，代码详见：https://github.com/lml200701158/go_demo/blob/master/current_limit/leaky_bucket.go</p></blockquote><h2 id="令牌桶" tabindex="-1"><a class="header-anchor" href="#令牌桶" aria-hidden="true">#</a> 令牌桶</h2><p>令牌桶算法（Token Bucket）是网络流量整形（Traffic Shaping）和速率限制（Rate Limiting）中最常使用的一种算法。典型情况下，令牌桶算法用来控制发送到网络上的数据的数目，并允许突发数据的发送。</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/sXFqMxQoVLHVUYY15MYFpF1D5fDtiao11icVOHT78cSGcDtjicoSxWVWic35PRlHYJWZOva2urwIToreQ9Wbq5MLbw/640?wx_fmt=png" alt=""></p><blockquote><p>图片如果看不清，可单击图片并放大。</p></blockquote><p>我们有一个固定的桶，桶里存放着令牌（token）。一开始桶是空的，系统按固定的时间（rate）往桶里添加令牌，直到桶里的令牌数满，多余的请求会被丢弃。当请求来的时候，从桶里移除一个令牌，如果桶是空的则拒绝请求或者阻塞。</p><p>令牌桶有以下特点：</p><ul><li>令牌按固定的速率被放入令牌桶中</li><li>桶中最多存放 B 个令牌，当桶满时，新添加的令牌被丢弃或拒绝</li><li>如果桶中的令牌不足 N 个，则不会删除令牌，且请求将被限流（丢弃或阻塞等待）</li></ul><p><strong>令牌桶限制的是平均流入速率</strong>（允许突发请求，只要有令牌就可以处理，支持一次拿3个令牌，4个令牌...），<strong>并允许一定程度突发流量，所以也是非常常用的限流算法。</strong></p><blockquote><p>为了不影响阅读，代码详见：https://github.com/lml200701158/go_demo/blob/master/current_limit/token_bucket.go</p></blockquote><h2 id="redis-lua-分布式限流" tabindex="-1"><a class="header-anchor" href="#redis-lua-分布式限流" aria-hidden="true">#</a> Redis + Lua 分布式限流</h2><p>单机版限流仅能保护自身节点，但无法保护应用依赖的各种服务，并且在进行节点扩容、缩容时也无法准确控制整个服务的请求限制。</p><p>而分布式限流，以集群为维度，可以方便的控制这个集群的请求限制，从而保护下游依赖的各种服务资源。</p><p><strong>分布式限流最关键的是要将限流服务做成原子化</strong>，我们可以借助 Redis 的计数器，Lua 执行的原子性，进行分布式限流，大致的 Lua 脚本代码如下：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>local key = &quot;rate.limit:&quot; .. KEYS[1] --限流KEY  
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9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><span class="author-item">楼仔</span></span><span property="author" content="楼仔"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 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class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-liaoliaoxianliu.html#计数器" class="router-link-active router-link-exact-active toc-link level2">计数器</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-liaoliaoxianliu.html#滑动窗口" class="router-link-active router-link-exact-active toc-link level2">滑动窗口</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-liaoliaoxianliu.html#漏桶" class="router-link-active router-link-exact-active toc-link level2">漏桶</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-liaoliaoxianliu.html#令牌桶" class="router-link-active router-link-exact-active toc-link level2">令牌桶</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-liaoliaoxianliu.html#redis-lua-分布式限流" class="router-link-active router-link-exact-active toc-link level2">Redis + Lua 分布式限流</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-liaoliaoxianliu.html#聊聊其它" class="router-link-active router-link-exact-active toc-link level2">聊聊其它</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><p><img src="https://mmbiz.qpic.cn/mmbiz_png/sXFqMxQoVLHVUYY15MYFpF1D5fDtiao11aXGgPFfcnNQpjThJUd2dxQnHwzDjRynia0ziaeMYr7tbQxkIfChlAicTg/640?wx_fmt=png" alt=""></p><p>大家好，我是楼仔！</p><p>在电商高并发场景下，我们经常会使用一些常用方法，去应对流量高峰，比如<strong>限流、熔断、降级</strong>，今天我们聊聊限流。</p><p>什么是限流呢？限流是限制到达系统的并发请求数量，保证系统能够正常响应部分用户请求，而对于超过限制的流量，则通过拒绝服务的方式保证整体系统的可用性。</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/sXFqMxQoVLHVUYY15MYFpF1D5fDtiao11SePQJZST6bL83CTafTCXICicdY5y66tomZ9Pmy8ibytiaWoLPyOWIwytQ/640?wx_fmt=png" alt=""></p><p>根据限流作用范围，可以分为<strong>单机限流和分布式限流</strong>；根据限流方式，又分为<strong>计数器、滑动窗口、漏桶和令牌桶限流</strong>，下面我们对这块详细进行讲解。</p><blockquote><p>文章大部分内容参考  TPaper 的<a href="https://mp.weixin.qq.com/s?__biz=MzI3MzQwNjcyNg==&amp;mid=2247485144&amp;idx=1&amp;sn=ebc4bddf53ba5dd01943f0e1b1d452fa&amp;chksm=eb2288b1dc5501a77a2108b2e439f35d09018a8b8d67b664126821bc18dc3df3272cb63dcf6e&amp;token=854767795&amp;lang=zh_CN&amp;scene=21#wechat_redirect" target="_blank" rel="noopener noreferrer">《Go 实现各类限流算法》<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，特此说明！</p></blockquote><h1 id="常用限流方式" tabindex="-1"><a class="header-anchor" href="#常用限流方式" aria-hidden="true">#</a> 常用限流方式</h1><h2 id="计数器" tabindex="-1"><a class="header-anchor" href="#计数器" aria-hidden="true">#</a> 计数器</h2><p>计数器是一种最简单限流算法，其原理就是：在一段时间间隔内，对请求进行计数，与阀值进行比较判断是否需要限流，一旦到了时间临界点，将计数器清零。</p><p>这个就像你去坐车一样，车厢规定了多少个位置，满了就不让上车了，不然就是超载了，被交警叔叔抓到了就要罚款的，如果我们的系统那就不是罚款的事情了，可能直接崩掉了。</p><p>程序执行逻辑：</p><ul><li>可以在程序中设置一个变量 count，当过来一个请求我就将这个数 +1，同时记录请求时间。</li><li>当下一个请求来的时候判断 count 的计数值是否超过设定的频次，以及当前请求的时间和第一次请求时间是否在 1 分钟内。</li><li>如果在 1 分钟内并且超过设定的频次则证明请求过多，后面的请求就拒绝掉。</li><li>如果该请求与第一个请求的间隔时间大于计数周期，且 count 值还在限流范围内，就重置 count。</li></ul><p>那么问题来了，如果有个需求对于某个接口 /query 每分钟最多允许访问 200 次，假设有个用户在第 59 秒的最后几毫秒瞬间发送 200 个请求，当 59 秒结束后 Counter 清零了，他在下一秒的时候又发送 200 个请求。</p><p>那么在 1 秒钟内这个用户发送了 2 倍的请求，这个是符合我们的设计逻辑的，这也是计数器方法的设计缺陷，系统可能会承受恶意用户的大量请求，甚至击穿系统。<strong>这种方法虽然简单，但也有个大问题就是没有很好的处理单位时间的边界。</strong></p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/sXFqMxQoVLHVUYY15MYFpF1D5fDtiao11VLPh0WuiaSUMmcNOiaYDksmxA9TqRZnv4IedWP2scGicHdict68U1lfd5Q/640?wx_fmt=png" alt=""></p><p>不过说实话，这个计数引用了锁，在高并发场景，这个方式可能不太实用，我建议将锁去掉，然后将 l.count++ 的逻辑通过原子计数处理，这样就可以保证 l.count 自增时不会被多个线程同时执行，<strong>即通过原子计数的方式实现限流。</strong></p><blockquote><p>为了不影响阅读，代码详见：https://github.com/lml200701158/go_demo/blob/master/current_limit/count.go</p></blockquote><h2 id="滑动窗口" tabindex="-1"><a class="header-anchor" href="#滑动窗口" aria-hidden="true">#</a> 滑动窗口</h2><p>滑动窗口是针对计数器存在的临界点缺陷，所谓滑动窗口（Sliding window）是一种流量控制技术，这个词出现在 TCP 协议中。滑动窗口把固定时间片进行划分，并且随着时间的流逝，进行移动，固定数量的可以移动的格子，进行计数并判断阀值。</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/sXFqMxQoVLHVUYY15MYFpF1D5fDtiao11JkTOP1RcxEScGNVtu1iaHKMjkZftZMZAS5UyFk7ULtZsjsMMbmqUoEw/640?wx_fmt=png" alt=""></p><p>上图中我们用红色的虚线代表一个时间窗口（一分钟），每个时间窗口有 6 个格子，每个格子是 10 秒钟。每过 10 秒钟时间窗口向右移动一格，可以看红色箭头的方向。我们为每个格子都设置一个独立的计数器 Counter，假如一个请求在 0:45 访问了那么我们将第五个格子的计数器 +1（也是就是 0:40~0:50），在判断限流的时候需要把所有格子的计数加起来和设定的频次进行比较即可。</p><p>那么滑动窗口如何解决我们上面遇到的问题呢？来看下面的图：</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/sXFqMxQoVLHVUYY15MYFpF1D5fDtiao117EDRACZWlicN0CrozU4omsVR8aHXeEsib3JhER7Y01t8SvKCicviaLXxgg/640?wx_fmt=png" alt=""></p><p>当用户在 0:59 秒钟发送了 200 个请求就会被第六个格子的计数器记录 +200，当下一秒的时候时间窗口向右移动了一个，此时计数器已经记录了该用户发送的 200 个请求，所以再发送的话就会触发限流，则拒绝新的请求。</p><p>其实计数器就是滑动窗口啊，只不过只有一个格子而已，所以想让限流做的更精确只需要划分更多的格子就可以了，为了更精确我们也不知道到底该设置多少个格子，<strong>格子的数量影响着滑动窗口算法的精度，依然有时间片的概念，无法根本解决临界点问题。</strong></p><blockquote><p>为了不影响阅读，代码详见：https://github.com/RussellLuo/slidingwindow</p></blockquote><h2 id="漏桶" tabindex="-1"><a class="header-anchor" href="#漏桶" aria-hidden="true">#</a> 漏桶</h2><p>漏桶算法（Leaky Bucket），原理就是一个固定容量的漏桶，按照固定速率流出水滴。</p><p>用过水龙头都知道，打开龙头开关水就会流下滴到水桶里，而漏桶指的是水桶下面有个漏洞可以出水,如果水龙头开的特别大那么水流速就会过大，这样就可能导致水桶的水满了然后溢出。</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/sXFqMxQoVLHVUYY15MYFpF1D5fDtiao11ic3Ly4IDNcADnCGUfsicicslXf2PR9ARDtasyFpVeUib2cuKsOZSiaxSqdw/640?wx_fmt=png" alt=""></p><blockquote><p>图片如果看不清，可单击图片并放大。</p></blockquote><p>一个固定容量的桶，有水流进来，也有水流出去。对于流进来的水来说，我们无法预计一共有多少水会流进来，也无法预计水流的速度。但是对于流出去的水来说，这个桶可以固定水流出的速率（处理速度），从而达到流量整形和流量控制的效果。</p><p>漏桶算法有以下特点：</p><ul><li>漏桶具有固定容量，出水速率是固定常量（流出请求）</li><li>如果桶是空的，则不需流出水滴</li><li>可以以任意速率流入水滴到漏桶（流入请求）</li><li>如果流入水滴超出了桶的容量，则流入的水滴溢出（新请求被拒绝）</li></ul><p>漏桶限制的是常量流出速率（即流出速率是一个固定常量值），<strong>所以最大的速率就是出水的速率，不能出现突发流量。</strong></p><blockquote><p>为了不影响阅读，代码详见：https://github.com/lml200701158/go_demo/blob/master/current_limit/leaky_bucket.go</p></blockquote><h2 id="令牌桶" tabindex="-1"><a class="header-anchor" href="#令牌桶" aria-hidden="true">#</a> 令牌桶</h2><p>令牌桶算法（Token Bucket）是网络流量整形（Traffic Shaping）和速率限制（Rate Limiting）中最常使用的一种算法。典型情况下，令牌桶算法用来控制发送到网络上的数据的数目，并允许突发数据的发送。</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/sXFqMxQoVLHVUYY15MYFpF1D5fDtiao11icVOHT78cSGcDtjicoSxWVWic35PRlHYJWZOva2urwIToreQ9Wbq5MLbw/640?wx_fmt=png" alt=""></p><blockquote><p>图片如果看不清，可单击图片并放大。</p></blockquote><p>我们有一个固定的桶，桶里存放着令牌（token）。一开始桶是空的，系统按固定的时间（rate）往桶里添加令牌，直到桶里的令牌数满，多余的请求会被丢弃。当请求来的时候，从桶里移除一个令牌，如果桶是空的则拒绝请求或者阻塞。</p><p>令牌桶有以下特点：</p><ul><li>令牌按固定的速率被放入令牌桶中</li><li>桶中最多存放 B 个令牌，当桶满时，新添加的令牌被丢弃或拒绝</li><li>如果桶中的令牌不足 N 个，则不会删除令牌，且请求将被限流（丢弃或阻塞等待）</li></ul><p><strong>令牌桶限制的是平均流入速率</strong>（允许突发请求，只要有令牌就可以处理，支持一次拿3个令牌，4个令牌...），<strong>并允许一定程度突发流量，所以也是非常常用的限流算法。</strong></p><blockquote><p>为了不影响阅读，代码详见：https://github.com/lml200701158/go_demo/blob/master/current_limit/token_bucket.go</p></blockquote><h2 id="redis-lua-分布式限流" tabindex="-1"><a class="header-anchor" href="#redis-lua-分布式限流" aria-hidden="true">#</a> Redis + Lua 分布式限流</h2><p>单机版限流仅能保护自身节点，但无法保护应用依赖的各种服务，并且在进行节点扩容、缩容时也无法准确控制整个服务的请求限制。</p><p>而分布式限流，以集群为维度，可以方便的控制这个集群的请求限制，从而保护下游依赖的各种服务资源。</p><p><strong>分布式限流最关键的是要将限流服务做成原子化</strong>，我们可以借助 Redis 的计数器，Lua 执行的原子性，进行分布式限流，大致的 Lua 脚本代码如下：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>local key = &quot;rate.limit:&quot; .. KEYS[1] --限流KEY  
 
 local limit = tonumber(ARGV[1])        --限流大小  
 
@@ -91,6 +91,6 @@ end
 }  
 
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h2 id="聊聊其它" tabindex="-1"><a class="header-anchor" href="#聊聊其它" aria-hidden="true">#</a> 聊聊其它</h2><p>上面的限流方式，主要是针对服务器进行限流，<strong>我们也可以对容器进行限流，比如 Tomcat、Nginx 等限流手段。</strong></p><p>Tomcat 可以设置最大线程数（maxThreads），当并发超过最大线程数会排队等待执行；而 Nginx 提供了两种限流手段：一是控制速率，二是控制并发连接数。</p><p>对于 Java 语言，我们其实有相关的限流组件，比如<strong>大家常用的 RateLimiter，其实就是基于令牌桶算法</strong>，大家知道为什么唯独选用令牌桶么？</p><p>对于 Go 语言，也有该语言特定的限流方式，比如可以通过 channel 实现并发控制限流，也支持第三方库 httpserver 实现限流，详见这篇 <a href="https://mp.weixin.qq.com/s?__biz=Mzg3OTU5NzQ1Mw==&amp;mid=2247484037&amp;idx=1&amp;sn=c638e6def7aee7f14c467202c9a55d4f&amp;chksm=cf034067f874c9712a288149593073c38696c6fd550e215a6f7dd0e0418ac4da8146b6c46970&amp;token=227017804&amp;lang=zh_CN&amp;scene=21#wechat_redirect" target="_blank" rel="noopener noreferrer">《Go 限流的常见方法》<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>。</p><p>在实际的限流场景中，我们也可以控制单个 IP、城市、渠道、设备 id、用户 id 等在一定时间内发送的请求数；如果是开放平台，需要为每个 appkey 设置独立的访问速率规则。</p><h1 id="限流对比" tabindex="-1"><a class="header-anchor" href="#限流对比" aria-hidden="true">#</a> 限流对比</h1><p>下面我们就对常用的线程策略，总结它们的优缺点，便于以后选型。</p><p><strong>计数器：</strong></p><ul><li>优点：固定时间段计数，实现简单，适用不太精准的场景；</li><li>缺点：对边界没有很好处理，导致限流不能精准控制。</li></ul><p><strong>滑动窗口：</strong></p><ul><li>优点：将固定时间段分块，时间比“计数器”复杂，适用于稍微精准的场景；</li><li>缺点：实现稍微复杂，还是不能彻底解决“计数器”存在的边界问题。</li></ul><p><strong>漏桶：</strong></p><ul><li>优点：可以很好的控制消费频率；</li><li>缺点：实现稍微复杂，单位时间内，不能多消费，感觉不太灵活。</li></ul><p><strong>令牌桶：</strong></p><ul><li>优点：可以解决“漏桶”不能灵活消费的问题，又能避免过渡消费，强烈推荐；</li><li>缺点：实现稍微复杂，其它缺点没有想到。</li></ul><p><strong>Redis + Lua 分布式限流：</strong></p><ul><li>优点：支持分布式限流，有效保护下游依赖的服务资源；</li><li>缺点：依赖 Redis，对边界没有很好处理，导致限流不能精准控制。</li></ul><blockquote><p>尽信书则不如无书，因个人能力有限，难免有疏漏和错误之处，如发现bug或者有更好的建议，欢迎批评指正，不吝感激。</p></blockquote><p>往期精选：</p><ul><li><a href="https://mp.weixin.qq.com/s?__biz=Mzg3OTU5NzQ1Mw==&amp;mid=2247486122&amp;idx=1&amp;sn=d5d28e0035ca144347027135187fbd11&amp;scene=21#wechat_redirect" target="_blank" rel="noopener noreferrer">如何看待程序员 35 岁职业危机？<span><svg class="external-link-icon" 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9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><span class="author-item">公子龙</span></span><span property="author" content="公子龙"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年6月9日</span><meta property="datePublished" content="2022-06-09T00:46:28.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 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7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 5 分钟</span><meta property="timeRequired" content="PT5M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-likbj.html#_1" class="router-link-active router-link-exact-active toc-link level2">1</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-likbj.html#_2" class="router-link-active router-link-exact-active toc-link level2">2</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-likbj.html#_3" class="router-link-active router-link-exact-active toc-link level2">3</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><p><strong>某脉上有个字节员工发的热帖</strong>：</p><p>今天和高中同学聊了聊，当初同样的分数去了某 985，他自动化我计算机。毕业的时候我们宿舍各个大厂几十万，他们宿舍都读研留在了二线，进了国企十万出头，对我们学院羡慕不已。</p><p>六年过去了，我们宿舍的人还都在一线租房加班，焦虑 35 危机，没有一个结婚的。他们宿舍的都已经在二线买房生娃，整天开车钓鱼遛狗，这一波我们输麻了。</p><hr><p>看了这段话，有些触动，想了想，本科毕业到现在，也差不多五年了，在北京这种竞争压力比较大的环境中谋生存。</p><p>如果当时本科毕业，或者两年前研究生毕业，回到离家近的城市，估计也会如同帖子中所说的，安心上班，攒钱买房成家生子，一步步的发展精确到年龄。</p><p>但现实是，我选择了毕业后还是留在北京，还想再拼一把。从之前到现在，留下来的原因，一直没有大的改变，主要有三个：<strong>高工资、高自由、爱情/家庭</strong>。</p><h2 id="_1" tabindex="-1"><a class="header-anchor" href="#_1" aria-hidden="true">#</a> 1</h2><p>最直接的，为了北京的高工资，心甘情愿留了下来，成为千万新时代农民工中普通的一员。</p><p>还在读大二的时候，在食堂吃饭，听到隔座的师兄们聊拿到的 offer，其中一位说，工作定了，月薪是 9800 元，那是 2014 年，这个工资直接震撼到我了。</p><p>那时的我对于工资没有太多概念，每个月的花费仅在六七百元左右，平时做家教一小时能够拿到五十元已经非常开心。当我听到师兄月入近万，心情还是非常激动的，因为这意味着我毕业时也能够拿到万元月薪，毕竟都是一个学校的差距应该不会太大。</p><p>试想，那时候的年薪十来万，对于我便具有如此般的诱惑力。等到我研究生毕业时，面对互联网提供的几十万的年薪，怎么可能不动心。</p><p>这种情况，大多只有家境富足，见过钱，也了解各类工资的性价比和长期发展的人，才能做出明智的选择，不会被眼前的利益冲昏头脑。很明显，我不属于这波人，大部分同学也不属于这波人，毕竟，有钱人的孩子是少数的。</p><h2 id="_2" tabindex="-1"><a class="header-anchor" href="#_2" aria-hidden="true">#</a> 2</h2><p>此外，除了高工资，打心底里，还是对于等级严明的公司制度有一种排斥。虽然互联网公司也存在这种等级，但程度会缓和很多，大家一起交流的氛围自在很多。</p><p>在传统的「企业」中，无论是事业单位，还是国企，给了员工更多的保障，也就是大家口中常说的稳定，为之的代价就是需要牺牲个人的部分自由，需要尊重各类规则。</p><p>我的性格从小就是很活泼，想法特别多，读书的时候不安分，工作的时候也不安分。导师给我一个任务，我如果有自己的想法，总会偷偷的去尝试下，这种性格，倘若我是领导，也大概率不会喜欢，注定在等级森严的企业内是很难长期发展的，说实话，这也是目前困扰我的一个问题，慢慢的调整自己，学会改进和妥协。</p><p>人成年之后，基本就是在挣扎和妥协中度过的，慢慢学会和自己和解。</p><h2 id="_3" tabindex="-1"><a class="header-anchor" href="#_3" aria-hidden="true">#</a> 3</h2><p>最重要的一点，也就是和女朋友，也就是现在的妻子，从上大学开始，就一直在北京这座城市打拼，快十年的时间了，基本是完整的青春岁月，一起经历过太多太多，已经很难离开这座城市了。</p><p>试想，有一天我们也许会离开北京，有两种情况，第一种是好的，我们有了更好的去处，去到一个更适合我们的城市，无论大小，家庭的生活质量会提高，焦虑会减少，生活起来欣欣向荣。</p><p>第二种是坏的，就是被动离开，我们承受不了这座都市带来的压力，不再年轻了，只能拿着这些年积攒的积蓄，选择另外一个地方重新开始。</p><p>最终，到底哪种情况会发生呢，我们不知道。但可以知道的是，现在的动作，会影响未来的走势，还是需要关注此刻的投入和付出，多学些本事，多积攒些资产，在认知上不断的提升自己，这样，当好的、坏的未来到来时，才能心平气和的坦然面对。</p><p><img src="https://mmbiz.qpic.cn/mmbiz_jpg/icmWrEONNM8XatxbCxk8v6frsbtPJg9XAicBOPflHOdlPYtCcNFmPqnB4iafDDXYuria2Bcib0noeyUiayxgPXbI8Y7g/640?wx_fmt=jpeg" alt=""></p><p>你好，我是公子龙，毕业于中科院，前大型计算机竞赛冠军，现大厂工程师，拿过九家大厂的 offer 。</p><p>北漂七年，从小白到计算机竞赛冠军，读研时通过实习和比赛收入 50 万，<a href="http://mp.weixin.qq.com/s?__biz=MzIzNTI3MTQxMg==&amp;mid=2652539525&amp;idx=1&amp;sn=800a2b635fcc59813f9e7948b97fc636&amp;chksm=f3078f1ec4700608579e837cdf4da7d30f41e24a68f8e14f585f662d673d0108218d92b751ec&amp;scene=21#wechat_redirect" target="_blank" rel="noopener noreferrer"><strong>点击蓝字查看我的编程之路</strong>。<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><p>同时，我也是 b 站 up 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class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->👏下载→Java版LeetCode刷题笔记</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年6月11日</span><meta property="datePublished" content="2022-06-11T12:15:48.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category2" role>学习资源</li><meta property="articleSection" content="学习资源"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag2" role>PDF</li></ul><meta property="keywords" content="PDF"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 4 分钟</span><meta property="timeRequired" content="PT4M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><p>不经意间，在 GitHub 上发现了一个 1G 棒的 LeetCode 刷题笔记，重点来了，是纯正的 Java 版。我见过很多牛逼的刷题笔记，有 Go 版的，有 C++ 版的，唯独没有 Java 版的，所以这次，我感觉找到了宝藏！</p><p>这次一次性把 C/C++、Java、Go 版的刷题笔记全部贡献出来，需要刷题笔记PDF文档的小伙伴可以直接长按扫码关注下方二维码，回复 「<strong>刷题笔记</strong>」 四个字自取：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/weixin-mozdsdzfjavableetcodetxxk-b3b2ca43-ec59-48f0-8db6-c38a7bcb28f4.jpg" alt=""></p><p>（长按扫码识别）</p><p>其实私下里很多小伙伴问我有没有 Java 版的，一开始我觉得刷题嘛，用啥语言刷题根本不重要，重要的是解题的思路。但看到这份 Java 版的刷题笔记后，我明白了，原来使用自己熟悉的编程语言来刷题，真的会提高刷题的幸福指数~</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/weixin-mozdsdzfjavableetcodetxxk-d82cdb3f-8181-495a-89ea-2a433dfada0e.jpg" alt=""></p><p>随便打开一道题解感受下，作者真的做到了图文并茂，不只是干巴巴的解题代码。这些手绘图让我感受到了作者的良苦用心，并且很多题都给出了多种解题思路，让我们能从不同的角度去思考，去得出最优解，而最优解，在面试的时候也是加分项。</p><p>作者从大一就知道了 LeetCode，但刷题总是三天打鱼两天晒网，隔断时间再去看之前刷过的题总是会想不起来，于是就萌发了刷一道题总结一题的想法。另外一方面，LeetCode 上的一些题解讲解得很少，有些只是简单的丢一些代码，对菜鸟很不友好，于是作者就想借这个机会把自己的各种解题方法都梳理清楚，然后详细地总结出来，也能方便其他小伙伴更好的理解，可谓一举多得。</p><p>作者在大一的时候就参加过 ACM 集训，但当时基础太差了，栈和队列都不清楚，所以 ACM 之路也就搁浅了。再准备刷题的时候已经是大四毕业的时候了。</p><p>作者在刷前几道题的时候也很慢，很多都没有思路，只能靠别人的解题思路才勉强过关。尤其是第 5 题求最长回文序列，用了好多天才把所有解法都总结了出来。</p><p>等到作者刷完 100 道题之后，发现真的是爱上了刷题。基本上后面的每道题都可以想出一种思路，甚至就是最优解，还会萌生一些别人没想到过的解法——哈哈，一种打游戏超神的感觉~</p><p>所以呢，我劝大家，不要怕自己基础不好，不要担心自己想不到解题思路，一开始就是借钱嘛，不不不，借鉴嘛，借的多了，自然就不用还了，成自己的了。重要的是开始和坚持。</p><blockquote><p>GitHub 地址：https://github.com/wind-liang/leetcode</p></blockquote><p>除了 Java 版的，还有 Go 版的。这份笔记里面共包含作者刷LeetCode算法题后整理的数百道题，每道题均附有详细题解过程。很多人表示刷数据结构和算法题效率不高，甚是痛苦。有了这个笔记的总结，对校招和社招的算法刷题帮助之大不言而喻，果断收藏了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/weixin-mozdsdzfjavableetcodetxxk-33e1bd88-9fa0-4ac5-9da6-b6e26407a140.jpg" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/weixin-mozdsdzfjavableetcodetxxk-362d4fd9-6ada-4576-ad0b-690b7fc3b6c9.jpg" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/weixin-mozdsdzfjavableetcodetxxk-57dd9d2e-5c5b-4025-a13b-6cdaadf24f2d.jpg" alt=""></p><blockquote><p>GitHub 地址：<a href="https://github.com/halfrost/LeetCode-Go" target="_blank" rel="noopener noreferrer">https://github.com/halfrost/LeetCode-Go<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>还有 C/C++ 版的，光看这份笔记的目录就觉得非常的震撼，相信你和我一样，都有这种强烈的感受。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/weixin-mozdsdzfjavableetcodetxxk-b67bf4f9-7ce7-47e7-9107-54ff723513be.jpg" alt=""></p><p>全书总共 143 页篇幅，详细讲解算法的内容有十五个章节。每个章节都是一些重要的知识点，伴有基础讲解和例题介绍，当然，也有一些推荐的练习题。</p><p>第 7 章是讲动态规划的，这里摘取了一点内容，大家可以看到作者对于知识点的讲解是非常透彻且细致的。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/weixin-mozdsdzfjavableetcodetxxk-13a7c1e1-9ae6-4157-9a92-a26701b642fd.jpg" alt=""></p><p>需要这三份刷题笔记PDF文档（包括 C/C++、Java、Go 版）的小伙伴可以直接长按扫码关注下方二维码，回复 「<strong>刷题笔记</strong>」 四个字自取：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/weixin-mozdsdzfjavableetcodetxxk-b3b2ca43-ec59-48f0-8db6-c38a7bcb28f4.jpg" alt=""></p><p>（长按扫码识别）</p><p><em>没有什么使我停留——除了目的，纵然岸旁有玫瑰、有绿荫、有宁静的港湾，我是不系之舟</em>。</p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/nice-article/weixin-mozdsdzfjavableetcodetxxk.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 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clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->👏下载→给操作系统捋条线</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年6月11日</span><meta property="datePublished" content="2022-06-11T12:15:48.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category2" role>学习资源</li><meta property="articleSection" content="学习资源"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag2" role>PDF</li></ul><meta property="keywords" content="PDF"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 3 分钟</span><meta property="timeRequired" content="PT3M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><p>最近认识个硬核读者，说是看了二哥的一些文章和心得后，很有收获，迫切地想要和二哥做朋友。言谈之中，能感受出来他的真诚。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/weixin-piaolwzjztqdtskwlzfpdf-15328923-2157-4713-a28e-9ce4b8f9c65d.jpg" alt=""></p><p>前几天，他又发私信说自己手撸了一份操作系统的学习资料，根据 MIT 6.828 教学操作系统 XV6 写出来的。</p><p>我认真看了他这份学习资料，看完后的感受是：“<strong>只怪自己没文化，一句牛逼走天下</strong>。”</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/weixin-piaolwzjztqdtskwlzfpdf-ebedebf5-f456-4071-9010-0728c8e9ba82.jpg" alt=""></p><p>这份资料细致到了各个部分，每个章节基本上可分为理论和代码两个部分，讲述的代码覆盖了源代码的百分之90以上。<strong>真的给操作系统捋了“一条线”出来，从硬件到软件将各个方面都给串起来了，能够让大家知道一个操作系统是如何设计的，从上电那一刻开始是如何一步步运行起来的</strong>。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/weixin-piaolwzjztqdtskwlzfpdf-6c4d0ed6-e89c-41ac-9ddf-6c1cde557d1a.jpg" alt=""></p><p>讲真，这样的好东西，二哥真想偷偷地藏起来，然后悄悄的学，最后惊艳所有人😁！</p><p>不过，大家都知道二哥是个古道热肠的人，巴不得把自己所学到的全部知识一股脑的输出给在座的各位读者朋友们。</p><p>那还卖什么关子，直接长按扫码关注下方二维码，回复 「<strong>操作系统</strong>」 下载这份 PDF 吧：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/weixin-piaolwzjztqdtskwlzfpdf-50115888-b781-4201-8e7b-50eba38959c7.jpg" alt=""></p><p>（长按扫码识别）</p><p>PDF 因为要分页，加之图片大小不一，格式可能差点，所以读者还准备了一份 HTML 格式的：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/weixin-piaolwzjztqdtskwlzfpdf-a430cd06-6ef6-4949-9590-adbc98562718.jpg" alt=""></p><p>另外，xv6.zip 是有注释的版本源码，xv6从启动到运行涉及到的所有部分是讲述了的。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/weixin-piaolwzjztqdtskwlzfpdf-b39ee21e-9356-4d90-8b22-2195067c59e5.jpg" alt=""></p><p>XV6 这个教学系统我之前在 B 站录的一期视频里有提到过：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/weixin-piaolwzjztqdtskwlzfpdf-ac79d3d7-0879-47f1-b0b5-6cd5155967e3.jpg" alt=""></p><p>这期视频的收藏比点赞多了一百多，足见里面内容是非常值得回味的。没看过的读者可以去刷一遍，应该收获会非常大：</p><blockquote><p>https://www.bilibili.com/video/BV1th411b7in/</p></blockquote><p>这期视频下面贴了非常多的硬核学习资料，再加上读者的这份《给操作系统捋条线》的 PDF，可以说是学习操作系统的最全攻略了！</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/weixin-piaolwzjztqdtskwlzfpdf-c9a25272-a78c-4c61-81a1-5503961c909d.jpg" alt=""></p><p>就像评论区的小伙伴说的那样：<strong>学好操作系统  就和普通增删改查的菜鸟程序员就不是一个层次了</strong>[doge]</p><p>有一说一，读者在大学阶段就能操作系统学到这种程度，基本上可以说是非常非常非常厉害了，是最近我遇到的那种为数不多的、未来可期的大学生之一。</p><p>来关注二哥的都是肯踏踏实实学习的小伙伴，那咱就不能掉队，对吧？必须得把操作系统给整起来了~</p><p>好了，今天就分享到这里吧！后续如果遇到有用的工具或者资源，依然会持续分享，也欢迎大家多多安利和交流，千万不要藏着掖着哦。</p><hr><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/weixin-piaolwzjztqdtskwlzfpdf-c0c8f634-4486-41ae-be11-b7ab89218cf5.jpg" alt=""></p><p><em>没有什么使我停留——除了目的，纵然岸旁有玫瑰、有绿荫、有宁静的港湾，我是不系之舟</em>。</p><p><strong>推荐阅读</strong>：</p><ul><li><a href="https://mp.weixin.qq.com/s?__biz=MzIxNzQwNjM3NA==&amp;mid=2247500487&amp;idx=1&amp;sn=97c7d92526c50265a0a8dacf09b485ea&amp;scene=21#wechat_redirect" target="_blank" rel="noopener noreferrer">去日企当程序员是什么体验？<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s?__biz=MzIxNzQwNjM3NA==&amp;mid=2247496157&amp;idx=1&amp;sn=72bfb33b81f156093d090d7c37190be9&amp;scene=21#wechat_redirect" target="_blank" rel="noopener noreferrer">二哥的读者（女，从小就想当黑客，初中学编程，高中造火箭<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s?__biz=MzIxNzQwNjM3NA==&amp;mid=2247495069&amp;idx=1&amp;sn=0ec93230f531210e647c113bc8d59cc1&amp;scene=21#wechat_redirect" target="_blank" rel="noopener noreferrer">二哥的读者（男，半年从机械转码，去携程实习了！<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/nice-article/weixin-piaolwzjztqdtskwlzfpdf.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 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一主多从</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-quoppomspwml.html#_5-4-mariadb同步多主机集群" class="router-link-active router-link-exact-active toc-link level3">5.4 MariaDB同步多主机集群</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-quoppomspwml.html#_5-5-数据库中间件" class="router-link-active router-link-exact-active toc-link level3">5.5 数据库中间件</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-quoppomspwml.html#_6-常见的索引结构有-哈希表结构属于哪种场景" class="router-link-active router-link-exact-active toc-link level2">6. 常见的索引结构有？哈希表结构属于哪种场景？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-quoppomspwml.html#_7-给你ab-ac-abc字段-你是如何加索引的" class="router-link-active router-link-exact-active toc-link level2">7.给你ab,ac,abc字段，你是如何加索引的？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-quoppomspwml.html#_8-数据库隔离级别是否了解-你们的数据库默认隔离级别是-为什么选它" class="router-link-active router-link-exact-active toc-link level2">8. 数据库隔离级别是否了解？你们的数据库默认隔离级别是？为什么选它？</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-quoppomspwml.html#_8-1-为什么mysql的默认隔离离别是rr" class="router-link-active router-link-exact-active toc-link level3">8.1 为什么MySQL的默认隔离离别是RR?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-quoppomspwml.html#我们的数据库隔离级别最后选的是读已提交-rc-。" class="router-link-active router-link-exact-active toc-link level3">我们的数据库隔离级别最后选的是读已提交（RC）。</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-quoppomspwml.html#_9-rr隔离级别实现原理-它是如何解决不可重复读的" class="router-link-active router-link-exact-active toc-link level2">9. RR隔离级别实现原理，它是如何解决不可重复读的？</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-quoppomspwml.html#_9-1-什么是不可重复读" class="router-link-active router-link-exact-active toc-link level3">9.1 什么是不可重复读</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-quoppomspwml.html#_9-2-undo-log版本链-read-view可见性规则" class="router-link-active router-link-exact-active toc-link level3">9.2 undo log版本链 + Read View可见性规则</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-quoppomspwml.html#_9-3-rr-如何解决不可重复读" class="router-link-active router-link-exact-active toc-link level3">9.3 RR 如何解决不可重复读</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-quoppomspwml.html#_10-你们项目使用了rocketmq对吧-那你知道如何保证消息不丢失吗" class="router-link-active router-link-exact-active toc-link level2">10. 你们项目使用了RocketMQ对吧？那你知道如何保证消息不丢失吗？</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-quoppomspwml.html#_10-1-生产者保证不丢消息" class="router-link-active router-link-exact-active toc-link level3">10.1 生产者保证不丢消息</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-quoppomspwml.html#_10-2-存储端不丢消息" class="router-link-active router-link-exact-active toc-link level3">10.2 存储端不丢消息</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-quoppomspwml.html#_10-3-消费阶段不丢消息" class="router-link-active router-link-exact-active toc-link level3">10.3 消费阶段不丢消息</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-quoppomspwml.html#_11-事务消息是否了解-场景题-比如下单清空购物车-你是如何设计的" class="router-link-active router-link-exact-active toc-link level2">11. 事务消息是否了解？场景题：比如下单清空购物车，你是如何设计的？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-quoppomspwml.html#_12-如何快速判断一个数是奇数还是偶数-除开对2取余呢。" class="router-link-active router-link-exact-active toc-link level2">12. 如何快速判断一个数是奇数还是偶数，除开对2取余呢。</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-quoppomspwml.html#_13-spring声明式事务原理-哪些场景事务会失效" class="router-link-active router-link-exact-active toc-link level2">13. Spring声明式事务原理？哪些场景事务会失效？</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-quoppomspwml.html#_13-1-声明式事务原理" class="router-link-active router-link-exact-active toc-link level3">13.1 声明式事务原理</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-quoppomspwml.html#_13-2-spring声明式事务哪些场景会失效" class="router-link-active router-link-exact-active toc-link level3">13.2 spring声明式事务哪些场景会失效</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-quoppomspwml.html#_14-你们是微服务架构嘛-如果你来设计一个类似淘宝的系统-你怎么划分微服务" class="router-link-active router-link-exact-active toc-link level2">14. 你们是微服务架构嘛？如果你来设计一个类似淘宝的系统，你怎么划分微服务？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-quoppomspwml.html#_15-你们是怎么分库分表的-分布式id如何生成" class="router-link-active router-link-exact-active toc-link level2">15. 你们是怎么分库分表的？分布式ID如何生成？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-quoppomspwml.html#_16-所有异常的共同的祖先是-运行时异常有哪几个" class="router-link-active router-link-exact-active toc-link level2">16. 所有异常的共同的祖先是？运行时异常有哪几个？</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h2 id="前言" tabindex="-1"><a class="header-anchor" href="#前言" aria-hidden="true">#</a> 前言</h2><p>大家好，我是<strong>鱼皮。</strong></p><p>最近有粉丝私信说被oppo的后端面试问麻了,所以今天给大家推荐一篇整理了16道oppo面试真题答案的文章。希望对大家有帮助哈，一起学习，一起进步。</p><ol><li>聊聊你印象最深刻的项目，或者做了什么优化。</li><li>你项目提到分布式锁，你们是怎么使用分布式锁的?</li><li>常见分布式事务解决方案</li><li>你们的接口幂等是如何保证的？</li><li>你们的MySQL架构是怎样的？</li><li>常见的索引结构有？哈希表结构属于哪种场景？</li><li>给你ab,ac,abc字段，你是如何加索引的？</li><li>数据库隔离级别是否了解？你们的数据库默认隔离级别是？为什么选它？</li><li>RR隔离级别实现原理，它是如何解决不可重复读的？</li><li>你们项目使用了RocketMQ对吧？那你知道如何保证消息不丢失吗？</li><li>事务消息是否了解？场景题：比如下单清空购物车，你是如何设计的？</li><li>如何快速判断一个数是奇数还是偶数，除开对2取余呢。</li><li>Spring声明式事务原理？哪些场景事务会失效？</li><li>你们是微服务架构嘛？如果你来设计一个类似淘宝的系统，你怎么划分微服务？</li><li>你们是怎么分库分表的？分布式ID如何生成？</li><li>所有异常的共同祖先是？运行时异常有哪几个？</li></ol><h2 id="_1-聊聊你印象最深刻的项目-或者做了什么优化。" tabindex="-1"><a class="header-anchor" href="#_1-聊聊你印象最深刻的项目-或者做了什么优化。" aria-hidden="true">#</a> 1. 聊聊你印象最深刻的项目，或者做了什么优化。</h2><p>大家平时做的项目，如果很多知识点跟面试八股文相关的话，就可以相对条理清晰地写到简历去。</p><ul><li>比如缓存数据库相关的，查询为空，你设置了一个<code>-1</code>到缓存，代表数据库没记录。下次判断<code>-1</code>，就不查库了，以解决缓存穿透问题。</li><li>又比如你设置缓存过期时间比较分散，解决缓存击穿问题，都可以条理清晰写到简历去，这样面试官很可能会问你相关的问题，这时候就对答如流啦。</li></ul><p>还有平时你做的项目，有一些比较好的设计，都可以说一下哈，比如你是如何保证数据一致性的，怎么优化接口性能的。</p><ul><li>如果是讲<strong>优化接口</strong>这一块的话，其实就是<strong>缓存、分批、并发调用、异步</strong>等那几个关键知识点。</li><li>如果是代码优化细节，你可以挑个简单的来讲，比如<strong>复杂的if逻辑条件，可以调整顺序，让程序更高效</strong>，这样会让面试官眼前一亮哦。</li></ul><h2 id="_2-你项目提到分布式锁-你们是怎么使用分布式锁的" tabindex="-1"><a class="header-anchor" href="#_2-你项目提到分布式锁-你们是怎么使用分布式锁的" aria-hidden="true">#</a> 2. 你项目提到分布式锁，你们是怎么使用分布式锁的?</h2><p>一般你讲述你做的项目时，面试官会根据你项目涉及的一些面试点，然后抽他感兴趣的一两个来问。所以大家对哪些知识点熟悉，讲述项目时，就说你用该知识点，解决了什么问题。</p><h2 id="_3-常见分布式事务解决方案" tabindex="-1"><a class="header-anchor" href="#_3-常见分布式事务解决方案" aria-hidden="true">#</a> 3. 常见分布式事务解决方案</h2><blockquote><p><strong>分布式事务</strong>：就是指事务的参与者、支持事务的服务器、资源服务器以及事务管理器分别位于不同的分布式系统的不同节点之上。简单来说，分布式事务指的就是分布式系统中的事务，它的存在就是为了保证不同数据库节点的数据一致性。</p></blockquote><p>聊到分布式事务，大家记得这两个理论哈：<strong>CAP理论 和 BASE 理论</strong></p><p>分布式事务的几种解决方案：</p><ul><li>2PC(二阶段提交)方案、3PC</li><li>TCC（Try、Confirm、Cancel）</li><li>本地消息表</li><li>最大努力通知</li><li>seata</li></ul><p><strong>2PC(二阶段提交)方案</strong></p><p>2PC，即两阶段提交，它将分布式事务的提交拆分为2个阶段：<code>prepare和commit/rollback</code>，即准备阶段和提交执行阶段。在prepare准备阶段需要等待所有参与子事务的反馈，因此可能造成数据库资源锁定时间过长，不适合并发高以及子事务生命周长较长的业务场景。并且协调者宕机的话，所有的参与者都收不到提交或回滚指令。</p><p><strong>3PC</strong></p><p>两阶段提交分别是：<code>CanCommit，PreCommit 和 doCommit</code>，这里不再详述。3PC 利用超时机制解决了 2PC 的同步阻塞问题，避免资源被永久锁定，进一步加强了整个事务过程的可靠性。但是 3PC 同样无法应对类似的宕机问题，只不过出现多数据源中数据不一致问题的概率更小。</p><p><strong>TCC</strong></p><p>TCC 采用了补偿机制，其核心思想是：针对每个操作，都要注册一个与其对应的确认和补偿（撤销）操作。它分为三个阶段：<code>Try-Confirm-Cancel</code></p><ul><li>try阶段：尝试去执行，完成所有业务的一致性检查，预留必须的业务资源。</li><li>Confirm阶段：该阶段对业务进行确认提交，不做任何检查，因为try阶段已经检查过了，默认Confirm阶段是不会出错的。</li><li>Cancel 阶段：若业务执行失败，则进入该阶段，它会释放try阶段占用的所有业务资源，并回滚Confirm阶段执行的所有操作。</li></ul><p>TCC方案让应用可以自定义数据库操作的粒度，降低了锁冲突，可以提升性能。但是应用侵入性强，try、confirm、cancel三个阶段都需要业务逻辑实现。</p><p><strong>本地消息表</strong></p><p>ebay最初提出本地消息表这个方案，来解决分布式事务问题。业界目前使用这种方案是比较多的，它的核心思想就是将分布式事务拆分成本地事务进行处理。可以看一下基本的实现流程图：</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PoF8jo1Pmpyab6GY4OsOf8bARCwJPIAibT2KKJWXTtgIC96nlbAhQfKvesxs5IPsu6y0Y1vHWiboicWc1J4Wca6XA/640?wx_fmt=png" alt=""></p><p><strong>最大努力通知</strong></p><p>最大努力通知方案的目标，就是发起通知方通过一定的机制，最大努力将业务处理结果通知到接收方。</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PoF8jo1Pmpyab6GY4OsOf8bARCwJPIAibiaf6TKxuMuJ4ECYJD30sJBU9kicsxFn0DRTzDEspCBhNJfWC8zubQQ5A/640?wx_fmt=png" alt=""></p><p><strong>seata</strong></p><p>Saga 模式是 Seata 提供的长事务解决方案。核心思想是将长事务拆分为多个本地短事务，由Saga事务协调器协调，如果正常结束那就正常完成，如果某个步骤失败，则根据相反顺序一次调用补偿操作。</p><p>Saga的并发度高，但是一致性弱，对于转账，可能发生用户已扣款，最后转账又失败的情况。</p><h2 id="_4-你们的接口幂等是如何保证的" tabindex="-1"><a class="header-anchor" href="#_4-你们的接口幂等是如何保证的" aria-hidden="true">#</a> 4. 你们的接口幂等是如何保证的？</h2><p>如果你调用下游接口超时了，是不是考虑重试？如果重试，下游接口就需要支持幂等啦。</p><p>实现幂等一般有这8种方案：</p><ul><li>select+insert+主键/唯一索引冲突</li><li>直接insert + 主键/唯一索引冲突</li><li>状态机幂等</li><li>抽取防重表</li><li>token令牌</li><li>悲观锁(如select for update，很少用)</li><li>乐观锁</li><li>分布式锁</li></ul><p>大家平时是用哪个方案解决幂等的，最后结合工作实际讲讲哈。</p><h2 id="_5-你们的mysql架构是怎样的" tabindex="-1"><a class="header-anchor" href="#_5-你们的mysql架构是怎样的" aria-hidden="true">#</a> 5. 你们的mySQL架构是怎样的？</h2><p>大家可以结合自己公司的MySQL架构聊聊。</p><p>数据的库高可用方案</p><ul><li>双机主备</li><li>一主一从</li><li>一主多从</li><li>MariaDB同步多主机</li><li>数据库中间件</li></ul><h3 id="_5-1-双机主备" tabindex="-1"><a class="header-anchor" href="#_5-1-双机主备" aria-hidden="true">#</a> 5.1 双机主备</h3><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PoF8jo1Pmpyab6GY4OsOf8bARCwJPIAibMrsSWww1lBtazR0jGJic8wz8U4sp8YIfneMBMibpKBysJUOgUmH02eeA/640?wx_fmt=png" alt=""></p><ul><li>优点：一个机器故障了可以自动切换，操作比较简单。</li><li>缺点：只有一个库在工作，读写压力大，未能实现读写分离，并发也有一定限制</li></ul><h3 id="_5-2-一主一从" tabindex="-1"><a class="header-anchor" href="#_5-2-一主一从" aria-hidden="true">#</a> 5.2 一主一从</h3><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PoF8jo1Pmpyab6GY4OsOf8bARCwJPIAibtbJHlYnknicibJgZQCsMTKtyTBZLA91jaVawqdjgiaIPVhOOPTXSJ3CDg/640?wx_fmt=png" alt=""></p><ul><li>优点：从库支持读，分担了主库的压力，提升了并发度。一个机器故障了可以自动切换，操作比较简单。</li><li>缺点：一台从库，并发支持还是不够，并且一共两台机器，还是存在同时故障的机率，不够高可用。</li></ul><h3 id="_5-3-一主多从" tabindex="-1"><a class="header-anchor" href="#_5-3-一主多从" aria-hidden="true">#</a> 5.3 一主多从</h3><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PoF8jo1Pmpyab6GY4OsOf8bARCwJPIAibQ9FgmO7AiaAC4ktliaddy5agyXnicGLNh81LSQV6YT25K8XQ1m5QYpxWw/640?wx_fmt=png" alt=""></p><ul><li>优点：多个从库支持读，分担了主库的压力，明显提升了读的并发度。</li><li>缺点：只有一台主机写，因此写的并发度不高</li></ul><h3 id="_5-4-mariadb同步多主机集群" tabindex="-1"><a class="header-anchor" href="#_5-4-mariadb同步多主机集群" aria-hidden="true">#</a> 5.4 MariaDB同步多主机集群</h3><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PoF8jo1Pmpyab6GY4OsOf8bARCwJPIAibwzjbh1NOgJlpvVSZYh0iahH3VCU860IiaMODnJzJHNyaVWNkKib3pJLww/640?wx_fmt=png" alt=""></p><ul><li>有代理层实现负载均衡，多个数据库可以同时进行读写操作；各个数据库之间可以通过Galera Replication方法进行数据同步，每个库理论上数据是完全一致的。</li><li>优点：读写的并发度都明显提升，可以任意节点读写，可以自动剔除故障节点，具有较高的可靠性。</li><li>缺点：数据量不支持特别大。要避免大事务卡死，如果集群节点一个变慢，其他节点也会跟着变慢。</li></ul><h3 id="_5-5-数据库中间件" tabindex="-1"><a class="header-anchor" href="#_5-5-数据库中间件" aria-hidden="true">#</a> 5.5 数据库中间件</h3><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PoF8jo1Pmpyab6GY4OsOf8bARCwJPIAibodj44g4RwPE7SYI4bqEZrIy4uX2MsBZZFCLicSGY0icmDH11WQmBoqdg/640?wx_fmt=png" alt=""></p><ul><li>mycat分片存储，每个分片配置一主多从的集群。</li><li>优点：解决高并发高数据量的高可用方案</li><li>缺点：维护成本比较大。</li></ul><h2 id="_6-常见的索引结构有-哈希表结构属于哪种场景" tabindex="-1"><a class="header-anchor" href="#_6-常见的索引结构有-哈希表结构属于哪种场景" aria-hidden="true">#</a> 6. 常见的索引结构有？哈希表结构属于哪种场景？</h2><p>哈希表、有序数组和搜索树。</p><ul><li>哈希表这种结构适用于只有等值查询的场景</li><li>有序数组适合范围查询，用二分法快速得到，时间复杂度为 O(log(N))。查询还好，如果是插入，就得挪动后面所有的记录，成本太高。因此它一般只适用静态存储引擎，比如保存2018年某个城市的所有人口信息。</li><li>B+树适合范围查询，我们一般建的索引结构都是B+树。</li></ul><h2 id="_7-给你ab-ac-abc字段-你是如何加索引的" tabindex="-1"><a class="header-anchor" href="#_7-给你ab-ac-abc字段-你是如何加索引的" aria-hidden="true">#</a> 7.给你ab,ac,abc字段，你是如何加索引的？</h2><p>这主要考察联合索引的最左前缀原则知识点。</p><ul><li>这个最左前缀可以是联合索引的最左<code>N</code>个字段。比如组合索引<code>（a,b,c）</code>可以相当于建了<code>（a），（a,b）,(a,b,c)</code>三个索引，大大提高了索引复用能力。</li><li>最左前缀也可以是字符串索引的最左<code>M</code>个字符。</li></ul><p>因此给你<code>ab,ac,abc</code>字段，你可以直接加<code>abc</code>联合索引和<code>ac</code>联合索引即可。</p><h2 id="_8-数据库隔离级别是否了解-你们的数据库默认隔离级别是-为什么选它" tabindex="-1"><a class="header-anchor" href="#_8-数据库隔离级别是否了解-你们的数据库默认隔离级别是-为什么选它" aria-hidden="true">#</a> 8. 数据库隔离级别是否了解？你们的数据库默认隔离级别是？为什么选它？</h2><p>四大数据库隔离级别，分别是<code>读未提交，读已提交，可重复读，串行化（Serializable）</code>。</p><ul><li><strong>读未提交</strong>：事务即使未提交，却可以被别的事务读取到的，这级别的事务隔离有脏读、重复读、幻读的问题。</li><li><strong>读已提交</strong>：当前事务只能读取到其他事务提交的数据，这种事务的隔离级别解决了脏读问题，但还是会存在不可重复读、幻读问题；</li><li><strong>可重复读</strong>：限制了读取数据的时候，不可以进行修改，所以解决了<strong>不可重复读</strong>的问题，但是读取范围数据的时候，是可以插入数据，所以还会存在幻读问题。</li><li><strong>串行化</strong>：事务最高的隔离级别，在该级别下，所有事务都是进行串行化顺序执行的。可以避免脏读、不可重复读与幻读所有并发问题。但是这种事务隔离级别下，事务执行很耗性能。</li></ul><p>MySQL选择<code>Repeatable Read（可重复读）</code>作为默认隔离级别，我们的数据库隔离级别选的是<code>读已提交</code>。</p><h3 id="_8-1-为什么mysql的默认隔离离别是rr" tabindex="-1"><a class="header-anchor" href="#_8-1-为什么mysql的默认隔离离别是rr" aria-hidden="true">#</a> 8.1 为什么MySQL的默认隔离离别是RR?</h3><p>binlog的格式也有三种：statement，row，mixed。设置为<code>statement</code>格式，binlog记录的是SQL的原文。又因为MySQL在主从复制的过程是通过<code>binlog</code>进行数据同步，如果设置为读已提交（RC）隔离级别，当出现事务乱序的时候，就会导致备库在 SQL 回放之后，结果和主库内容不一致。</p><p>比如一个表t，表中有两条记录：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>  
+
+CREATE TABLE t (    
+
+     a int(11) DEFAULT NULL,    
+
+     b int(11) DEFAULT NULL,    
+
+     PRIMARY KEY a (a),  
+
+     KEY b(b)  
+
+   ) ENGINE=InnoDB DEFAULT CHARSET=latin1;    
+
+   insert into t1 values(10,666),(20,233);   
+
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>两个事务并发写操作，如下：</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PoF8jo1Pmpyab6GY4OsOf8bARCwJPIAibMSvVJf2hnOWETT26buWgm1Llib2MGUon1bbqnloLhicclJibT4daY84QQ/640?wx_fmt=png" alt=""></p><p>在<code>读已提交（RC）</code>隔离级别下，两个事务执行完后，数据库的两条记录就变成了<code>（30,666）、(20,666)</code>。这两个事务执行完后，binlog也就有两条记录，因为事务binlog用的是<code>statement</code>格式，事务2先提交，因此<code>update t set b=666 where b=233</code>优先记录，而<code>update t set a=30 where b=666</code>记录在后面。</p><p>当<code>bin log</code>同步到从库后，执行<code>update t set b=666 where b=233</code>和<code>update t set a=30 where b=666</code>记录，数据库的记录就变成<code>（30,666）、(30,666)</code>，这时候主从数据不一致啦。</p><p>因此MySQL的<strong>默认隔离离别</strong>选择了<code>RR</code>而不是<code>RC</code>。<code>RR</code>隔离级别下，更新数据的时候不仅对更新的行加行级锁，还会加间隙锁<code>（gap lock）</code>。事务2要执行时，因为事务1增加了间隙锁，就会导致事务2执行被卡住，只有等事务1提交或者回滚后才能继续执行。</p><p>并且，MySQL还禁止在使用<code>statement</code>格式的<code>binlog</code>的情况下，使用<code>READ COMMITTED</code>作为事务隔离级别。</p><h3 id="我们的数据库隔离级别最后选的是读已提交-rc-。" tabindex="-1"><a class="header-anchor" href="#我们的数据库隔离级别最后选的是读已提交-rc-。" aria-hidden="true">#</a> 我们的数据库隔离级别最后选的是读已提交（RC）。</h3><p>那为什么MySQL官方默认隔离级别是RR，而有些大厂选择了RC作为默认的隔离级别呢？</p><ul><li>提升并发</li></ul><p>RC 在加锁的过程中，不需要添加<code>Gap Lock</code>和 <code>Next-Key Lock</code> 的，只对要修改的记录添加行级锁就行了。因此RC的支持的并发度比RR高得多，</p><ul><li>减少死锁</li></ul><p>正是因为RR隔离级别增加了<code>Gap Lock</code>和 <code>Next-Key Lock</code> 锁，因此它相对于RC，更容易产生死锁。</p><h2 id="_9-rr隔离级别实现原理-它是如何解决不可重复读的" tabindex="-1"><a class="header-anchor" href="#_9-rr隔离级别实现原理-它是如何解决不可重复读的" aria-hidden="true">#</a> 9. RR隔离级别实现原理，它是如何解决不可重复读的？</h2><h3 id="_9-1-什么是不可重复读" tabindex="-1"><a class="header-anchor" href="#_9-1-什么是不可重复读" aria-hidden="true">#</a> 9.1 什么是不可重复读</h3><p>先回忆下什么是<strong>不可重复读</strong>。假设现在有两个事务A和B：</p><ul><li>事务A先查询Jay的余额，查到结果是100</li><li>这时候事务B 对Jay的账户余额进行扣减，扣去10后，提交事务</li><li>事务A再去查询Jay的账户余额发现变成了90</li></ul><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PoF8jo1Pmpyab6GY4OsOf8bARCwJPIAiba3OUDd1QonTWQ4CmyOzEaGVWAtzdgicwY8yUPwtFjjePRbn7J7UspsQ/640?wx_fmt=png" alt=""></p><p>事务A被事务B干扰到了！在事务A范围内，两个相同的查询，<strong>读取同一条记录，却返回了不同的数据，这就是不可重复读</strong>。</p><h3 id="_9-2-undo-log版本链-read-view可见性规则" tabindex="-1"><a class="header-anchor" href="#_9-2-undo-log版本链-read-view可见性规则" aria-hidden="true">#</a> 9.2 undo log版本链 + Read View可见性规则</h3><p>RR隔离级别实现原理，就是MVCC多版本并发控制，而MVCC是是通过<code>Read View+ Undo Log</code>实现的，Undo Log 保存了历史快照，Read View可见性规则帮助判断当前版本的数据是否可见。</p><p><code>Undo Log</code>版本链长这样：</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PoF8jo1Pmpyab6GY4OsOf8bARCwJPIAibeVAZhoVfuV2AAdIFnzda5mBmllMGTtV25nNPUBU0SkBZOYdibjibpvwQ/640?wx_fmt=png" alt=""></p><p>Read view 的几个重要属性</p><ul><li><code>m_ids</code>:当前系统中那些活跃(未提交)的读写事务ID, 它数据结构为一个List。</li><li><code>min_limit_id</code>:表示在生成Read View时，当前系统中活跃的读写事务中最小的事务id，即m_ids中的最小值。</li><li><code>max_limit_id</code>:表示生成Read View时，系统中应该分配给下一个事务的id值。</li><li><code>creator_trx_id</code>: 创建当前Read View的事务ID</li></ul><p>Read view 可见性规则如下：</p><ol><li>如果数据事务ID<code>trx_id &lt; min_limit_id</code>，表明生成该版本的事务在生成Read View前，已经提交(因为事务ID是递增的)，所以该版本可以被当前事务访问。</li><li>如果<code>trx_id&gt;= max_limit_id</code>，表明生成该版本的事务在生成Read View后才生成，所以该版本不可以被当前事务访问。</li><li>如果<code>min_limit_id =&lt;trx_id&lt; max_limit_id</code>,需要分3种情况讨论</li></ol><blockquote><ul><li>3.1 如果<code>m_ids</code>包含<code>trx_id</code>,则代表Read View生成时刻，这个事务还未提交，但是如果数据的<code>trx_id</code>等于<code>creator_trx_id</code>的话，表明数据是自己生成的，因此是可见的。</li><li>3.2 如果<code>m_ids</code>包含<code>trx_id</code>，并且<code>trx_id</code>不等于<code>creator_trx_id</code>，则Read View生成时，事务未提交，并且不是自己生产的，所以当前事务也是看不见的；</li><li>3.3 如果<code>m_ids</code>不包含<code>trx_id</code>，则说明你这个事务在Read View生成之前就已经提交了，修改的结果，当前事务是能看见的。</li></ul></blockquote><h3 id="_9-3-rr-如何解决不可重复读" tabindex="-1"><a class="header-anchor" href="#_9-3-rr-如何解决不可重复读" aria-hidden="true">#</a> 9.3 RR 如何解决不可重复读</h3><p>查询一条记录，基于MVCC，是怎样的流程</p><ol><li>获取事务自己的版本号，即事务ID</li><li>获取Read View</li><li>查询得到的数据，然后Read View中的事务版本号进行比较。</li><li>如果不符合Read View的可见性规则， 即就需要Undo log中历史快照;</li><li>最后返回符合规则的数据</li></ol><p>假设存在事务A和B，SQL执行流程如下</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PoF8jo1Pmpyab6GY4OsOf8bARCwJPIAibu16icBALg9RgePHoREiaicIMKfhicdTYDpicKgc698tUQrZj9QaFicqgJU9A/640?wx_fmt=png" alt=""></p><p>在可重复读（RR）隔离级别下，<strong>一个事务里只会获取一次Read View</strong>，都是副本共用的，从而保证每次查询的数据都是一样的。</p><p>假设当前有一张core_user表，插入一条初始化数据,如下：</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PoF8jo1Pmpyab6GY4OsOf8bARCwJPIAib5BuIpklWZXauSovTx5Da38rpmWiauAQ7zkY12DnAuvgW5JnOIvYVGqw/640?wx_fmt=png" alt="">基于MVCC，我们来看看执行流程</p><ol><li>A开启事务，首先得到一个事务ID为100</li><li>B开启事务，得到事务ID为101</li><li>事务A生成一个Read View，read view对应的值如下</li></ol><table><thead><tr><th>变量</th><th>值</th></tr></thead><tbody><tr><td>m_ids</td><td>100，101</td></tr><tr><td>max_limit_id</td><td>102</td></tr><tr><td>min_limit_id</td><td>100</td></tr><tr><td>creator_trx_id</td><td>100</td></tr></tbody></table><p>然后回到版本链：开始从版本链中挑选可见的记录：</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PoF8jo1Pmpyab6GY4OsOf8bARCwJPIAiblmQLBfGiaGHzqQEYCPhgTtYPSfoWXDkFcp9MqYPUuO2sEkuyS9mPNqA/640?wx_fmt=png" alt=""></p><p>由图可以看出，最新版本的列name的内容是孙权，该版本的trx_id值为100。开始执行<strong>read view可见性规则</strong>校验：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>min_limit_id(100)=&lt;trx_id（100）&lt;102;  
+
+creator_trx_id = trx_id =100;  
+
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>由此可得，trx_id=100的这个记录，当前事务是可见的。所以查到是<strong>name为孙权</strong>的记录。</p><ol start="4"><li>事务B进行修改操作，把名字改为曹操。把原数据拷贝到undo log,然后对数据进行修改，标记事务ID和上一个数据版本在undo log的地址。</li></ol><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PoF8jo1Pmpyab6GY4OsOf8bARCwJPIAiblILtb4QNnneTsITr691ePXzahWjYUxjAgcjiaWXic7v7weZ7cQTibIpEQ/640?wx_fmt=png" alt=""></p><ol start="5"><li>事务B提交事务</li><li>事务A再次执行查询操作，因为是RR（可重复读）隔离级别，因此<strong>会复用老的Read View副本</strong>，Read View对应的值如下</li></ol><table><thead><tr><th>变量</th><th>值</th></tr></thead><tbody><tr><td>m_ids</td><td>100，101</td></tr><tr><td>max_limit_id</td><td>102</td></tr><tr><td>min_limit_id</td><td>100</td></tr><tr><td>creator_trx_id</td><td>100</td></tr></tbody></table><p>然后再次回到版本链：从版本链中挑选可见的记录：</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PoF8jo1Pmpyab6GY4OsOf8bARCwJPIAiblILtb4QNnneTsITr691ePXzahWjYUxjAgcjiaWXic7v7weZ7cQTibIpEQ/640?wx_fmt=png" alt=""></p><p>从图可得，最新版本的列name的内容是曹操，该版本的trx_id值为101。开始执行read view可见性规则校验：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>min_limit_id(100)=&lt;trx_id（101）&lt;max_limit_id（102);  
+
+因为m_ids{100,101}包含trx_id（101），  
+
+并且creator_trx_id (100) 不等于trx_id（101）  
+
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>所以，<code>trx_id=101</code>这个记录，对于当前事务是不可见的。这时候呢，版本链<code>roll_pointer</code>跳到下一个版本，<code>trx_id=100</code>这个记录，再次校验是否可见：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>min_limit_id(100)=&lt;trx_id（100）&lt; max_limit_id（102);  
+
+因为m_ids{100,101}包含trx_id（100），  
+
+并且creator_trx_id (100) 等于trx_id（100）  
+
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>所以，trx_id=100这个记录，对于当前事务是可见的，所以两次查询结果，都是name=孙权的那个记录。即在可重复读（RR）隔离级别下，复用老的Read View副本，解决了不可重复读的问题。</p><h2 id="_10-你们项目使用了rocketmq对吧-那你知道如何保证消息不丢失吗" tabindex="-1"><a class="header-anchor" href="#_10-你们项目使用了rocketmq对吧-那你知道如何保证消息不丢失吗" aria-hidden="true">#</a> 10. 你们项目使用了RocketMQ对吧？那你知道如何保证消息不丢失吗？</h2><p>一个消息从生产者产生，到被消费者消费，主要经过这3个过程：</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PoF8jo1Pmpyab6GY4OsOf8bARCwJPIAibSFUmX9dROjhlhKSkbCL8BMMIRXaXmAv17N4AJLMhsfickoic4icJMFUBw/640?wx_fmt=png" alt=""></p><ol><li>生产者产生消息</li><li>消息发送到存储端，保存下来</li><li>消息推送到消费者，消费者消费完，ack应答。</li></ol><p>因此如何保证MQ不丢失消息，可以从这三个阶段阐述：</p><ul><li>生产者保证不丢消息</li><li>存储端不丢消息</li><li>消费者不丢消息</li></ul><h3 id="_10-1-生产者保证不丢消息" tabindex="-1"><a class="header-anchor" href="#_10-1-生产者保证不丢消息" aria-hidden="true">#</a> 10.1 生产者保证不丢消息</h3><p>生产端如何保证不丢消息呢？确保生产的消息能顺利到达存储端。</p><p>如果是<code>RocketMQ</code>消息中间件的话，<code>Producer</code>生产者提供了三种发送消息的方式，分别是：</p><ul><li>同步发送</li><li>异步发送</li><li>单向发送</li></ul><p>生产者要想发消息时保证消息不丢失，可以：</p><ul><li>采用同步方式发送，send消息方法返回成功状态，即消息正常到达了存储端<code>Broker</code>。</li><li>如果<code>send</code>消息异常或者返回非成功状态，可以发起重试。</li><li>可以使用事务消息，<code>RocketMQ</code>的事务消息机制就是为了保证零丢失来设计的</li></ul><h3 id="_10-2-存储端不丢消息" tabindex="-1"><a class="header-anchor" href="#_10-2-存储端不丢消息" aria-hidden="true">#</a> 10.2 存储端不丢消息</h3><p>如何保证存储端的消息不丢失呢？确保消息持久化到磁盘，那就是刷盘机制嘛。</p><p>刷盘机制分<strong>同步刷盘和异步刷盘</strong>：</p><ul><li>同步刷盘：生产者消息发过来时，只有持久化到磁盘，<code>RocketMQ</code>的存储端<code>Broker</code>才返回一个成功的ACK响应。它保证消息不丢失，但是影响了性能。</li><li>异步刷盘：只要消息写入<code>PageCache</code>缓存，就返回一个成功的ACK响应。这样提高了MQ的性能，但是如果这时候机器断电了，就会丢失消息。</li></ul><p>除了同步刷盘机制，还有一个维度需要考虑。<code>Broker</code>一般是集群部署的，有主节点和从节点。消息到<code>Broker</code>存储端，只有主节点和从节点都写入成功，才反馈成功的<code>ack</code>给生产者。这就是<strong>同步复制</strong>，它保证了消息不丢失，但是降低了系统的吞吐量。与之对应即是<strong>异步复制</strong>，只要消息写入主节点成功，就返回成功的<code>ack</code>，它速度快，但是会有性能问题。</p><h3 id="_10-3-消费阶段不丢消息" tabindex="-1"><a class="header-anchor" href="#_10-3-消费阶段不丢消息" aria-hidden="true">#</a> 10.3 消费阶段不丢消息</h3><p>消费者<strong>执行完业务逻辑</strong>，再反馈会<code>Broker</code>说消费成功，这样才可以保证消费阶段不丢消息。</p><h2 id="_11-事务消息是否了解-场景题-比如下单清空购物车-你是如何设计的" tabindex="-1"><a class="header-anchor" href="#_11-事务消息是否了解-场景题-比如下单清空购物车-你是如何设计的" aria-hidden="true">#</a> 11. 事务消息是否了解？场景题：比如下单清空购物车，你是如何设计的？</h2><p>事务消息主要用来解决消息生产者和消息消费者的<strong>数据一致性</strong>问题。我们先来回忆一下：一条普通的消息队列消息，从产生到被消费，经历的流程：</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PoF8jo1Pmpyab6GY4OsOf8bARCwJPIAib2EBLoKW7wmkPG1Kx4roia2FvKkq1qMROmTm0ia0IwahtPhqX95ahvDIw/640?wx_fmt=png" alt=""></p><ol><li>生产者产生消息，发送到MQ服务器</li><li>MQ收到消息后，将消息持久化到存储系统。</li><li>MQ服务器返回ACk到生产者。</li><li>MQ服务器把消息push给消费者</li><li>消费者消费完消息，响应ACK</li><li>MQ服务器收到ACK，认为消息消费成功，即在存储中删除消息。</li></ol><p><strong>消息队列的事务消息流程是怎样的呢？</strong></p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PoF8jo1Pmpyab6GY4OsOf8bARCwJPIAib79pCtYibaibSzQyf5y9qBaJA5Ikm6orohQoNBJ7aMa8daeCX42FcIkLQ/640?wx_fmt=png" alt=""></p><ol><li>生产者产生消息，发送一条半事务消息到MQ服务器</li><li>MQ收到消息后，将消息持久化到存储系统，这条消息的状态是待发送状态。</li><li>MQ服务器返回ACK确认到生产者，此时MQ不会触发消息推送事件</li><li>生产者执行本地事务</li><li>如果本地事务执行成功，即commit执行结果到MQ服务器；如果执行失败，发送rollback。</li><li>如果是正常的commit，MQ服务器更新消息状态为可发送；如果是rollback，即删除消息。</li><li>如果消息状态更新为可发送，则MQ服务器会push消息给消费者。消费者消费完就回ACK。</li><li>如果MQ服务器长时间没有收到生产者的commit或者rollback，它会反查生产者，然后根据查询到的结果执行最终状态。</li></ol><p>我们举个下<strong>订单清空购物车</strong>的例子吧。订单系统创建完订单后，然后发消息给下游系统购物车系统，清空购物车。</p><ol><li>生产者（订单系统）产生消息，发送一条半事务消息到MQ服务器</li><li>MQ收到消息后，将消息持久化到存储系统，这条消息的状态是待发送状态。</li><li>MQ服务器返回ACK确认到生产者，此时MQ不会触发消息推送事件</li><li>生产者执行本地事务（订单创建成功，提交事务消息）</li><li>如果本地事务执行成功，即commit执行结果到MQ服务器；如果执行失败，发送rollback。</li><li>如果是commit正常提交，MQ服务器更新消息状态为<strong>可发送</strong>；如果是rollback，即<strong>删除消息</strong>。</li><li>如果消息状态更新为可发送，则MQ服务器会push消息给消费者（购物车系统）。消费者消费完（即拿到订单消息，清空购物车成功）就应答ACK。</li><li>如果MQ服务器长时间没有收到生产者的commit或者rollback，它会反查生产者，然后根据查询到的结果（回滚操作或者重新发送消息）执行最终状态。</li></ol><p>有些伙伴可能有疑惑，如果消费者消费失败怎么办呢？那数据是不是不一致啦？所以就需要消费者消费成功，执行业务逻辑成功，再反馈ack嘛。如果消费者消费失败，那就自动重试嘛，接口支持幂等即可。</p><h2 id="_12-如何快速判断一个数是奇数还是偶数-除开对2取余呢。" tabindex="-1"><a class="header-anchor" href="#_12-如何快速判断一个数是奇数还是偶数-除开对2取余呢。" aria-hidden="true">#</a> 12. 如何快速判断一个数是奇数还是偶数，除开对2取余呢。</h2><p>判断一个数是奇数还是偶数，我们最容易想到的就是对2取余。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>if( x % 2 )  
+
+// 奇数  
+
+else  
+
+// 偶数  
+
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>还有一种方法，就是与1相与（ <code>&amp;1</code>），具体实现如下：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>if( x &amp; 1 )  
+
+// 奇数  
+
+else  
+
+// 偶数  
+
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h2 id="_13-spring声明式事务原理-哪些场景事务会失效" tabindex="-1"><a class="header-anchor" href="#_13-spring声明式事务原理-哪些场景事务会失效" aria-hidden="true">#</a> 13. Spring声明式事务原理？哪些场景事务会失效？</h2><h3 id="_13-1-声明式事务原理" tabindex="-1"><a class="header-anchor" href="#_13-1-声明式事务原理" aria-hidden="true">#</a> 13.1 声明式事务原理</h3><p>spring声明式事务，即<code>@Transactional</code>,它可以帮助我们把事务开启、提交或者回滚的操作，通过Aop的方式进行管理。</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PoF8jo1Pmpyab6GY4OsOf8bARCwJPIAibPoVt2fkoUtViabEcOricib1UlGsUYMCFd5RtiaHJvtJH9xUhzJNIibOEY3g/640?wx_fmt=png" alt=""></p><p>在spring的bean的初始化过程中，就需要对实例化的bean进行代理，并且生成代理对象。生成代理对象的代理逻辑中，进行方法调用时，需要先获取切面逻辑，@Transactional注解的切面逻辑类似于@Around，在spring中是实现一种类似代理逻辑。</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PoF8jo1Pmpyab6GY4OsOf8bARCwJPIAibabVia8uVswlbU6jDLmiaVBCnUia7WicSIodG9n25NBZKialicfvN9Wh2mcLQ/640?wx_fmt=png" alt=""></p><h3 id="_13-2-spring声明式事务哪些场景会失效" tabindex="-1"><a class="header-anchor" href="#_13-2-spring声明式事务哪些场景会失效" aria-hidden="true">#</a> 13.2 spring声明式事务哪些场景会失效</h3><ul><li>方法的访问权限必须是public，其他private等权限，事务失效</li><li>方法被定义成了final的，这样会导致事务失效。</li><li>在同一个类中的方法直接内部调用，会导致事务失效。</li><li>一个方法如果没交给spring管理，就不会生成spring事务。</li><li>多线程调用，两个方法不在同一个线程中，获取到的数据库连接不一样的。</li><li>表的存储引擎不支持事务</li><li>如果自己try...catch误吞了异常，事务失效。</li><li>错误的传播</li></ul><h2 id="_14-你们是微服务架构嘛-如果你来设计一个类似淘宝的系统-你怎么划分微服务" tabindex="-1"><a class="header-anchor" href="#_14-你们是微服务架构嘛-如果你来设计一个类似淘宝的系统-你怎么划分微服务" aria-hidden="true">#</a> 14. 你们是微服务架构嘛？如果你来设计一个类似淘宝的系统，你怎么划分微服务？</h2><p>可以按业务领域、功能、重要程度进行划分。</p><ul><li>可以按业务领域，把用户、社区、商品信息、消息等模块等划分。</li><li>单一功能职责，按功能拆分，比如订单、支付、物流、权限。</li><li>按重要程度划分，区分核心和非核心功能，比如支付、订单就是核心功能。</li></ul><h2 id="_15-你们是怎么分库分表的-分布式id如何生成" tabindex="-1"><a class="header-anchor" href="#_15-你们是怎么分库分表的-分布式id如何生成" aria-hidden="true">#</a> 15. 你们是怎么分库分表的？分布式ID如何生成？</h2><p>如果是我们公司的话，使用了水平分库的方式，就是一个用户注册时，就划分了属于哪个数据库，然后具体的表结构是一样的。</p><p>业界还有垂直分库，就是按照不同的系统中的不同业务进行拆分，比如拆分成用户库、订单库、积分库、商品库，把它们部署在不同的数据库服务器。</p><p>分表的话也有水平分表和垂直分表，垂直分表就是将一些不常用的、数据较大或者长度较长的列拆分到另外一张表，水平分表就是可以按照某种规则（如hash取模、range），把数据切分到多张表去。一张订单表，按时间range拆分如下：</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PoF8jo1Pmpyab6GY4OsOf8bARCwJPIAibibwxSUuBLQicjr2q2DxQGkuwLfzObHFtghxZs7U1zY36UauDguV8tTCg/640?wx_fmt=png" alt=""></p><p><strong>range划分利于数据迁移，但是存在数据热点问题。hash取模划分，不会存在明显的热点问题，但是不利于扩容。可以range+hash取模结合使用。</strong></p><p><strong>分布式ID可以使用雪花算法生成</strong></p><blockquote><p>雪花算法是一种生成分布式全局唯一ID的算法，生成的ID称为Snowflake IDs。这种算法由Twitter创建，并用于推文的ID。</p></blockquote><p>一个Snowflake ID有64位。</p><ul><li>第1位：Java中long的最高位是符号位代表正负，正数是0，负数是1，一般生成ID都为正数，所以默认为0。</li><li>接下来前41位是时间戳，表示了自选定的时期以来的毫秒数。</li><li>接下来的10位代表计算机ID，防止冲突。</li><li>其余12位代表每台机器上生成ID的序列号，这允许在同一毫秒内创建多个Snowflake ID。</li></ul><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PoF8jo1Pmpyab6GY4OsOf8bARCwJPIAibtbZ2rSkCTXPD8icnFvCnSfvWDrXvLiaibnrdOBXCc6hoViadUyEuic9tfJg/640?wx_fmt=png" alt=""></p><h2 id="_16-所有异常的共同的祖先是-运行时异常有哪几个" tabindex="-1"><a class="header-anchor" href="#_16-所有异常的共同的祖先是-运行时异常有哪几个" aria-hidden="true">#</a> 16. 所有异常的共同的祖先是？运行时异常有哪几个？</h2><p><img src="https://mmbiz.qpic.cn/mmbiz_png/PoF8jo1Pmpyab6GY4OsOf8bARCwJPIAibpAbukOczHzcpQcicFGMUrNoibCC40seujqTicWM4iaRJHmATp1vhK9kTdA/640?wx_fmt=png" alt=""></p><p>Java 异常的顶层父类是<code>Throwable</code>，它生了两个儿子，大儿子叫<code>Error</code>,二儿子叫<code>Exception</code>。</p><ul><li><strong>Error</strong>：是程序⽆法处理的错误，一般表示系统错误，例如虚拟机相关的错误<code>OutOfMemoryError</code></li><li><strong>Exception</strong>：程序本身可以处理的异常。它可以分为RuntimeException（运行时异常）和CheckedException（可检查的异常）。</li></ul><p><strong>什么是RuntimeException（运行时异常）</strong>？</p><blockquote><p>运行时异常是不检查异常，程序中可以选择捕获处理，也可以不处理。这些异常一般是由程序逻辑错误引起的，程序应该从逻辑角度尽可能避免这类异常的发生。</p></blockquote><p>常见的<strong>RuntimeException异常</strong>：</p><ul><li>NullPointerException：空指针异常</li><li>ArithmeticException：出现异常的运算条件时，抛出此异常</li><li>IndexOutOfBoundsException：数组索引越界异常</li><li>ClassNotFoundException：找不到类异常</li><li>IllegalArgumentException(非法参数异常)</li></ul><p>什么是<strong>CheckedException（可检查的异常）</strong>？</p><blockquote><p>从程序语法角度讲是必须进行处理的异常，如果不处理，程序就不能编译通过。如IOException、SQLException等。</p></blockquote><p><strong>常见的 Checked Exception 异常：</strong></p><ul><li>IOException：(操作输入流和输出流时可能出现的异常)</li><li>SQLException</li></ul><hr><p>以上就是本期分享了。</p><p>最后,欢迎加入 <a href="http://mp.weixin.qq.com/s?__biz=MzI1NDczNTAwMA==&amp;mid=2247508640&amp;idx=1&amp;sn=b02fff3533f18b5d0bfbf714b127c140&amp;chksm=e9c24557deb5cc41b1f2ecefdd23eb1370e261a47c23ad89b1d1428537fd1e8fe39762e707e1&amp;scene=21#wechat_redirect" target="_blank" rel="noopener noreferrer">鱼皮的编程知识星球<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>（点击了解详情），和 8200 多名小伙伴们一起交流学习，向鱼皮和大厂同学 1 对 1 提问、帮你制定学习计划不迷茫、跟着鱼皮直播做项目（往期项目可无限回看）、领取鱼皮原创编程学习/求职资料等。</p><p><img src="https://mmbiz.qpic.cn/mmbiz_jpg/mngWTkJEOYJrQEPNiamWq4Z9AouO3XptkSsSJro9icBwc5icEmL6ficibOW2SwMHUOSmur5WsSQVw4oWNYx0EM7bgng/640?wx_fmt=jpeg" alt=""></p><p>往期推荐</p><p>[</p><p>几个对程序员的误解，害人不浅！</p><p>](https://mp.weixin.qq.com/s?__biz=MzI1NDczNTAwMA==&amp;mid=2247509151&amp;idx=1&amp;sn=113246153900f18be1134697457f909c&amp;chksm=e9c24368deb5ca7e662c1bd7d2acf52df662c284ace43f2bc3bbb4a378da0340113d428fe6f4&amp;scene=21#wechat_redirect)</p><p>[</p><p>编程导航，火了！</p><p>](https://mp.weixin.qq.com/s?__biz=MzI1NDczNTAwMA==&amp;mid=2247508640&amp;idx=1&amp;sn=b02fff3533f18b5d0bfbf714b127c140&amp;chksm=e9c24557deb5cc41b1f2ecefdd23eb1370e261a47c23ad89b1d1428537fd1e8fe39762e707e1&amp;scene=21#wechat_redirect)</p><p>[</p><p>Gitee 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clickable active"><!----><span class="title">PDF下载</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/download/java.html" class="nav-link sidebar-link sidebar-page"><span class="icon iconfont icon-xiazai" style=""></span><!----><!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/nice-article/weixin-bagwpdf.html" class="nav-link sidebar-link sidebar-page"><span class="icon iconfont icon-xiazai" style=""></span><!----><!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/nice-article/weixin-shenrjcjavabfbchwjdhl.html" class="nav-link sidebar-link sidebar-page"><span class="icon iconfont icon-xiazai" style=""></span><!----><!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/nice-article/weixin-githubxbkdjavajccjyh.html" class="nav-link sidebar-link sidebar-page"><span class="icon iconfont icon-xiazai" style=""></span><!----><!----></a><ul 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class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/download/weixin-piaolwzjztqdtskwlzfpdf.md" class="nav-link sidebar-link sidebar-page"><span class="icon iconfont icon-xiazai" style=""></span><!----><!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/download/progit.html" class="nav-link sidebar-link sidebar-page"><span class="icon iconfont icon-xiazai" style=""></span><!----><!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/download/jianli.html" class="nav-link sidebar-link sidebar-page"><span class="icon iconfont icon-xiazai" style=""></span><!----><!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">学习建议</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->👏下载→重学Java设计模式</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年6月11日</span><meta property="datePublished" content="2022-06-11T12:15:48.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category2" role>学习资源</li><meta property="articleSection" content="学习资源"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag2" role>PDF</li></ul><meta property="keywords" content="PDF"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 4 分钟</span><meta property="timeRequired" content="PT4M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><p>时不时就有读者私信我，“二哥，<strong>我的代码写得很烂，该怎么办呀</strong>？”</p><p>写代码确实是门手艺活，这是我们程序员不得不承认的一个事实，毕竟要用手指头来敲啊！不是手艺活是啥（笑）</p><p>简单来分析一下代码写得烂的原因哈。其一，可能是刚入门，代码写得少，如果我们满打满算只写过一两千行代码，是不可能写出多优雅的代码的。其二，可能我们不懂设计模式，设计模式是软件设计中常见问题的典型解决方案，它们就像能根据需求进行调整的预制蓝图， 可用于解决代码中反复出现的设计问题，如果不懂设计模式的话，遇到这些问题就只能抓瞎了。</p><p>这么说吧，<strong>设计模式玩得炉火纯青，写出的代码就更优雅，阅读起来也会更加舒服，可维护性、可扩展性就更强</strong>。</p><p>说到这，我确信大家已经了解设计模式的重要性了！<strong>这里给大家推荐一份全网阅读超过 500 万次的设计模式 PDF，持续霸榜 GitHub Trending。</strong></p><p><strong>微信搜索「<strong>沉默王二</strong>」发送「<strong>10</strong>」关键字领取即可领取，也可以扫描下面的二维码关注后发送</strong>「<strong>10</strong>」关键字**。**</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/weixin-shejmsnb-79a353da-80da-4779-ae59-0f3183f1a14c.jpg" alt=""></p><p>再来推荐一个网站：Refactoring Guru。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/weixin-shejmsnb-c582a192-0373-45b2-99de-69e688d31baa.jpg" alt="">网址如下所示：</p><blockquote><p>https://refactoring.guru</p></blockquote><p><strong>这虽然是一个国外的网站，却神奇的实现了中文化国际化，爱了爱了，无情地爱了</strong>。据作者说，他建站的初衷就是为了帮助我们程序员，快速地掌握设计模式，但把网站做到这种用心的程度，我只能情不自禁地点赞了！</p><p>来看一下设计模式的目录吧（下图中只展现了创建型模式和结构型模式中的一部分，还有行为模式）：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/weixin-shejmsnb-e28938e4-f117-4afe-966b-e44d0ec022a0.jpg" alt="">每个模式都会对应一篇图文并茂的文章，阅读起来就好像在读绘本一样，生动有趣，令人印象深刻，学起来就没有半点枯燥的感觉。来看一下工厂方法模式的一部分内容截图，这图片的质量，确实高啊，不服不行！</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/weixin-shejmsnb-6ab000de-34e7-44f2-9b06-b9d92cc0c043.jpg" alt=""></p><p>配套的代码示例也非常完整，来看一下 Java 版的：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>public class WindowsButton implements Button {  
+
+    JPanel panel = new JPanel();  
+
+    JFrame frame = new JFrame();  
+
+    JButton button;  
+
+  
+
+    public void render() {  
+
+        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);  
+
+        JLabel label = new JLabel(&quot;Hello World!&quot;);  
+
+        label.setOpaque(true);  
+
+        label.setBackground(new Color(235, 233, 126));  
+
+        label.setFont(new Font(&quot;Dialog&quot;, Font.BOLD, 44));  
+
+        label.setHorizontalAlignment(SwingConstants.CENTER);  
+
+        panel.setLayout(new FlowLayout(FlowLayout.CENTER));  
+
+        frame.getContentPane().add(panel);  
+
+        panel.add(label);  
+
+        onClick();  
+
+        panel.add(button);  
+
+  
+
+        frame.setSize(320, 200);  
+
+        frame.setVisible(true);  
+
+        onClick();  
+
+    }  
+
+  
+
+    public void onClick() {  
+
+        button = new JButton(&quot;Exit&quot;);  
+
+        button.addActionListener(new ActionListener() {  
+
+            public void actionPerformed(ActionEvent e) {  
+
+                frame.setVisible(false);  
+
+                System.exit(0);  
+
+            }  
+
+        });  
+
+    }  
+
+}  
+
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>当然了，代码示例不只有 Java 版的，还有 C#、C++、Python、Go 等 8 种常见的编程语言。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/weixin-shejmsnb-3a219b1c-be2b-4586-b7d3-5c0ea23975b5.jpg" alt="">这种<strong>图文并茂 + 代码示例</strong>的学习方式，极大地加深了我们程序员对知识的吸收。还有什么赞美的词语？学富五车的我竟然有点词穷了。总之，如果大家也想学好设计模式，赶快点吧！</p><p>离线版的 PDF 我也贡献出来了，截取一部分内容供大家预览下。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/weixin-shejmsnb-92309f22-ac2d-4cef-81cb-9f83bf9380d6.jpg" alt="">里面有不少图文参照了 Refactoring Guru 这个网站，但也加入了作者自己的思考和理解，读起来也更接地气一点。按照作者说的：</p><blockquote><p>很高兴你能拿到这本书，如果你能坚持看完并按照书中的例⼦进行实践，那么在编程开发的世界里，就⼜多了了⼀个可以写出良好代码的⼈，同时也为架构师培养储备了了⼀个⼈才。</p></blockquote><p>如果大家对这份 PDF 感兴趣的话，可以<strong>微信搜索「<strong>沉默王二</strong>」发送</strong>关键字「<strong>设计模式</strong>」获取下载链接：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/weixin-shejmsnb-79a353da-80da-4779-ae59-0f3183f1a14c.jpg" alt=""></p><p>也可以扫描上面的二维码关注后发送 「<strong>10</strong> 」获取下载链接</p><p><strong>一起成为牛逼的程序员！</strong></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/nice-article/weixin-shejmsnb.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 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content="PT4M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-shenrjcjavabfbchwjdhl.html#一、掌握基础概念" class="router-link-active router-link-exact-active toc-link level3">一、掌握基础概念</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-shenrjcjavabfbchwjdhl.html#二、拿下常见的并发工具类" class="router-link-active router-link-exact-active toc-link level3">二、拿下常见的并发工具类</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-shenrjcjavabfbchwjdhl.html#三、并发编程全景图" class="router-link-active router-link-exact-active toc-link level3">三、并发编程全景图</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-shenrjcjavabfbchwjdhl.html#四、深入浅出-java-多线程" class="router-link-active router-link-exact-active toc-link level3">四、深入浅出 Java 多线程</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><p>你好，我是二哥。对于一个 Java 程序员而言，能否熟练掌握并发编程是判断他优秀与否的重要标准之一。因为并发编程是 Java 语言中最为晦涩的知识点，它涉及操作系统、内存、CPU、编程语言等多方面的基础能力，更能考验一个程序员的内功。</p><p>尤其是大数据时代的来临，高并发更成为了家常便饭，工作中，你总是绕不开并发编程的任务，比如说，你想写个程序，一边从文件中读取数据，一边还要做实时计算…所以，<strong>想成为一名资深的 Java 后端工程师，想进大厂，并发编程必须要牢牢把握</strong>。</p><p>微信搜索「<strong>沉默王二</strong>」关注后，在后台回复「<strong>并发</strong>」即可获取《深入浅出 Java 多线程》小册一本，文末有详细介绍。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/weixin-shenrjcjavabfbchwjdhl-c39527c4-ea87-4336-8490-bb0e36c1ed22.jpg" alt=""></p><p>也可以截图后，微信扫码关注后回复「<strong>006</strong>」</p><h3 id="一、掌握基础概念" tabindex="-1"><a class="header-anchor" href="#一、掌握基础概念" aria-hidden="true">#</a> 一、掌握基础概念</h3><p>学习 Java 并发编程，第一步就是要打下坚实的基础，把涉及的相关基础概念都搞清楚。比如，深度认识 Java 内存模型、死锁产生的原因和解决方案、线程间的协作机制，等等。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/weixin-shenrjcjavabfbchwjdhl-05c70ffd-7779-426c-86fa-dac18cb63501.jpg" alt=""></p><h3 id="二、拿下常见的并发工具类" tabindex="-1"><a class="header-anchor" href="#二、拿下常见的并发工具类" aria-hidden="true">#</a> 二、拿下常见的并发工具类</h3><p>把并发编程核心的问题搞清楚，回过头来看 Java SDK 并发包，你才会有种豁然开朗的感觉：它不过是针对并发问题开发出来的工具而已。而此时的 SDK 并发包就可以任你“盘”了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/weixin-shenrjcjavabfbchwjdhl-5cd089fe-6c67-49e6-af45-b2e1f9b2e05e.jpg" alt=""></p><h3 id="三、并发编程全景图" tabindex="-1"><a class="header-anchor" href="#三、并发编程全景图" aria-hidden="true">#</a> 三、并发编程全景图</h3><p>学习最忌讳的就是“盲人摸象”，只看到局部，而没有看到全局。所以，你需要从一个个单一的知识和技术中“跳出来”，高屋建瓴地看并发编程。当然，这首要之事就是你建立起一张全景图。</p><p>结合我多年的工作经验来看，并发编程领域可以抽象成<strong>三个核心问题：分工、同步和互斥</strong>。以下是我根据这三个核心问题制作的「并发编程全景图」，可以让你的知识成体系，所学知识也融汇贯通起来，由点成线，由线及面。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/weixin-shenrjcjavabfbchwjdhl-b8030855-7f2a-42cd-9231-a9f7b0269e53.jpg" alt=""></p><p>但是光跳出来还不够，还需要下一步，就是在某个问题上钻进去，深入理解，找到本质。比如，当看到 Java SDK 里面的条件变量 Condition 的时候，我会下意识地问，“它是从哪儿来的？是 Java 的特有概念，还是一个通用的编程概念？”当我知道他来自管程的时候，我又会问，“管程被提出的背景和解决的问题是什么？”这样一路探索下来，我发现 Java 语言里的并发技术基本都是有理论基础的，并且这些理论在其他编程语言里也有类似的实现。</p><h3 id="四、深入浅出-java-多线程" tabindex="-1"><a class="header-anchor" href="#四、深入浅出-java-多线程" aria-hidden="true">#</a> 四、深入浅出 Java 多线程</h3><p>学习 Java 并发编程，有一本书是跳不过去的，那就是《<strong>Java 并发编程实战</strong>》，但这本书往往读起来会感觉比较深奥，怎么办呢？</p><p>几位阿里的大佬偷偷写了一本《<strong>深入浅出 Java 多线程</strong>》，并且在 GitHub 上开源了。</p><p>先说说这几名作者哈。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/weixin-shenrjcjavabfbchwjdhl-b43e334f-9226-4078-ae47-77858c84f1b2.jpg" alt=""></p><p>给力吧，都是大佬，所以他们的作品也非常值得信赖。再给你看一下大致的内容，就 Java 内存模型这块的知识点，就讲的非常透彻。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/weixin-shenrjcjavabfbchwjdhl-2a4c068e-8381-491c-a330-9afec9cd43dd.jpg" alt=""></p><p>除了这本，我这还屯了不少 Java 并发编程方面的电子书。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/weixin-shenrjcjavabfbchwjdhl-37f2db07-1543-4ac7-b8fc-b51b7dc15d84.jpg" alt=""></p><p><strong>微信搜索「沉默王二」关注后，在后台回复「书单」即可获取本文书单链接。</strong></p><p><strong>回复「pdf」即可获取本文提到的书籍电子版pdf</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/nice-article/weixin-shenrjcjavabfbchwjdhl-c39527c4-ea87-4336-8490-bb0e36c1ed22.jpg" alt=""></p><p><strong>也可以截图后，微信扫码关注</strong></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/nice-article/weixin-shenrjcjavabfbchwjdhl.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon 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class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->新来了个技术总监：谁再在 POJO 中使用基本数据类型，以后就不用来了！</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><span class="author-item">Hollis</span></span><span property="author" content="Hollis"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 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8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 4 分钟</span><meta property="timeRequired" content="PT4M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-xinllgjszjszzpojozsyjbsjlxyhjfyll.html#程序汪资料链接" class="router-link-active router-link-exact-active toc-link level2">程序汪资料链接</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><p>大家好，我是程序汪</p><p>程序员编码时一些不经意的细节可能导致一些很难察觉的BUG，上生产运行一段时间后才发现，真的很头疼。</p><p>在《阿里巴巴Java开发手册》中，对于POJO中如何选择变量的类型以及 RPC 接口中的返回值类型也有着一些规定：</p><p><img src="https://mmbiz.qpic.cn/mmbiz_jpg/6fuT3emWI5IibzibgbpjKvoJTZebia3RKDOd3L0BMFtTBSsDmcbUPh8VAlQh2icxdcqbMybEhnNoGS24SNLUWBx71Q/640?wx_fmt=jpeg" alt=""></p><p>这里强制要求使用包装类型，原因是什么呢？</p><p>我们来看一段简单的代码</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>/**  
+    <div id="app"><!--[--><!--[--><!--[--><span tabindex="-1"></span><a href="#main-content" class="skip-link sr-only">Skip to content</a><!--]--><div class="theme-container has-toc"><!--[--><!--[--><header class="navbar"><div class="navbar-left"><button class="toggle-sidebar-button" title="Toggle Sidebar"><span class="icon"></span></button><!----><a href="/" class="brand"><img class="logo" src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/logo-02.png" alt="Java 程序员进阶之路"><!----><span class="site-name hide-in-pad">Java 程序员进阶之路</span></a><!----></div><div class="navbar-center"><!----><nav class="nav-links"><div class="nav-item hide-in-mobile"><a href="/home.html" class="nav-link" aria-label="进阶之路"><span class="icon iconfont icon-lujing" style=""></span>进阶之路<!----></a></div><div class="nav-item hide-in-mobile"><a href="/zhishixingqiu/java-mianshi-zhinan.html" class="nav-link" aria-label="星球专栏"><span class="icon iconfont icon-Artboard" style=""></span>星球专栏<!----></a></div><div 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clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->新来了个技术总监：谁再在 POJO 中使用基本数据类型，以后就不用来了！</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 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00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年6月6日</span><meta property="datePublished" content="2022-06-05T23:36:38.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category4" role>优质文章</li><meta property="articleSection" content="优质文章"></ul></span><!----><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 4 分钟</span><meta property="timeRequired" content="PT4M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-xinllgjszjszzpojozsyjbsjlxyhjfyll.html#程序汪资料链接" class="router-link-active router-link-exact-active toc-link level2">程序汪资料链接</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><p>大家好，我是程序汪</p><p>程序员编码时一些不经意的细节可能导致一些很难察觉的BUG，上生产运行一段时间后才发现，真的很头疼。</p><p>在《阿里巴巴Java开发手册》中，对于POJO中如何选择变量的类型以及 RPC 接口中的返回值类型也有着一些规定：</p><p><img src="https://mmbiz.qpic.cn/mmbiz_jpg/6fuT3emWI5IibzibgbpjKvoJTZebia3RKDOd3L0BMFtTBSsDmcbUPh8VAlQh2icxdcqbMybEhnNoGS24SNLUWBx71Q/640?wx_fmt=jpeg" alt=""></p><p>这里强制要求使用包装类型，原因是什么呢？</p><p>我们来看一段简单的代码</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>/**  
 
  * @author Hollis  
 
@@ -109,6 +109,6 @@ class Model {
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>以上代码输出结果为：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>default model : Model[success=null, failure=false]  
 
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><p>可以看到，当我们没有设置Model对象的字段的值的时候，Boolean类型的变量会设置默认值为null，而boolean类型的变量会设置默认值为false。</p><p><strong>即Boolean对象的默认值是</strong><code>null</code>，<strong>boolean基本数据类型的默认值是</strong><code>false</code>。</p><p>也就是说，包装类型的默认值都是null，而基本数据类型的默认值是一个固定值，如boolean是false，byte、short、int、long是0，float是0.0f等；</p><p>我们再举一个扣费的例子，我们做一个扣费系统，扣费时需要从外部的定价系统中通过 RPC 请求读取一个费率的值，我们预期该接口的返回值中会包含一个浮点型的费率字段。当我们取到这个值得时候就使用公式：金额*费率=费用 进行计算，计算结果进行划扣。</p><p>如果由于计费系统异常，他可能会返回个默认值，如果这个字段是Double类型的话，该默认值为null，如果该字段是double类型的话，该默认值为0.0。</p><p>如果扣费系统对于该费率返回值没做特殊处理的话，拿到null值进行计算会直接报错，阻断程序。拿到0.0可能就直接进行计算，得出接口为0后进行扣费了。这种异常情况就无法被感知。</p><p>有人说，那我可以对0.0做特殊判断，如果是0一样可以阻断报错啊。但是，这时候就会产生一个问题，如果允许费率是0的场景又怎么处理呢？</p><p><strong>所以，使用基本数据类型只会让方案越来越复杂，坑越来越多。</strong></p><p>这种使用包装类型定义变量的方式，通过异常来阻断程序，进而可以被识别到这种线上问题。如果使用基本数据类型的话，系统可能不会报错，进而认为无异常。</p><p>当然，以上的选择是针对一些电商、支付、金融等场景，可以牺牲暂时的可用性的场景，如果是对于某些软件系统，可以容忍数据不准，但是不能系统不可用的情况要另当别论。</p><p><strong>以上，就是要求在POJO和RPC的返回值中使用包装类型的原因。</strong></p><h2 id="程序汪资料链接" tabindex="-1"><a class="header-anchor" href="#程序汪资料链接" aria-hidden="true">#</a> 程序汪资料链接</h2><p><a href="http://mp.weixin.qq.com/s?__biz=MzA4NzQ0Njc4Ng==&amp;mid=2247501524&amp;idx=1&amp;sn=2cb28e7b64ab77c55bcc1a172b82a2ad&amp;chksm=903bc2b9a74c4baf5737cd430560ee3c5a357bb37864257a05a72e3cccf41db5bd221ccc63d8&amp;scene=21#wechat_redirect" target="_blank" rel="noopener noreferrer">程序汪接的7个私活都在这里，经验整理<span><svg class="external-link-icon" 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class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-zaixsfdnavicatzkkydsjkglgjjmgxk.html#beekeeper-studio-简介" class="router-link-active router-link-exact-active toc-link level2">Beekeeper Studio 简介</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-zaixsfdnavicatzkkydsjkglgjjmgxk.html#下载安装" class="router-link-active router-link-exact-active toc-link level2">下载安装</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-zaixsfdnavicatzkkydsjkglgjjmgxk.html#使用" class="router-link-active router-link-exact-active toc-link level2">使用</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-zaixsfdnavicatzkkydsjkglgjjmgxk.html#外观设置" class="router-link-active router-link-exact-active toc-link level3">外观设置</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-zaixsfdnavicatzkkydsjkglgjjmgxk.html#创建数据源" class="router-link-active router-link-exact-active toc-link level3">创建数据源</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-zaixsfdnavicatzkkydsjkglgjjmgxk.html#管理表操作" class="router-link-active router-link-exact-active toc-link level3">管理表操作</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-zaixsfdnavicatzkkydsjkglgjjmgxk.html#sql操作" class="router-link-active router-link-exact-active toc-link level3">SQL操作</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-zaixsfdnavicatzkkydsjkglgjjmgxk.html#总结" class="router-link-active router-link-exact-active toc-link level2">总结</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-zaixsfdnavicatzkkydsjkglgjjmgxk.html#项目地址" class="router-link-active router-link-exact-active toc-link level2">项目地址</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-zaixsfdnavicatzkkydsjkglgjjmgxk.html#推荐阅读" class="router-link-active router-link-exact-active toc-link level2">推荐阅读</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><blockquote><p>数据库管理工具，是后端程序员使用频率非常高的的工具。Navicat、DataGrip虽然很好用，但都是收费的。最近在逛Github的时候，无意间发现了一款开源的数据库管理工具<code>Beekeeper Studio</code>，界面非常炫酷推荐给大家！</p></blockquote><h2 id="beekeeper-studio-简介" tabindex="-1"><a class="header-anchor" href="#beekeeper-studio-简介" aria-hidden="true">#</a> Beekeeper Studio 简介</h2><p>Beekeeper Studio 是一款跨平台的数据库管理工具，支持Linux、Mac、 Windows系统，目前在Github上已有<code>9.8K+Star</code>。</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/CKvMdchsUwkm2gfiaJAsqpn0skbVhpgQT6YxfgfCwyIarHznK0BazDa5lLvHtibLToibS0icLfFDicCTNHdqz1UuHFA/640?wx_fmt=png" alt=""></p><p>一看到它的深色模式主题时，我就感觉它的界面很炫酷，非常符合程序员的审美，大家可以看下。</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/CKvMdchsUwkm2gfiaJAsqpn0skbVhpgQTuEsdn8kbFbIunWib1ibJQyoasnA40AmDJJNWHJ0xaao0wNmrhrrXXia2g/640?wx_fmt=png" alt=""></p><h2 id="下载安装" tabindex="-1"><a class="header-anchor" href="#下载安装" aria-hidden="true">#</a> 下载安装</h2><p>Beekeeper Studio 有免费的社区版可以使用，不想安装的小伙伴可以下载便携版，下载地址：https://www.beekeeperstudio.io/get</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/CKvMdchsUwkm2gfiaJAsqpn0skbVhpgQTvzPwBAOfILcPlGJBTxomxA4IBRFS8HjmibcuenyotrV17iaKeSGZMu0g/640?wx_fmt=png" alt=""></p><p>下载完成后双击<code>.exe</code>文件即可运行，运行成功后效果如下，默认是浅色主题。</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/CKvMdchsUwkm2gfiaJAsqpn0skbVhpgQTaCLsAvvdlkbf0P0wanctLeCyS5VXqGkIhaeOHMI4ekuvj30IMcoF1g/640?wx_fmt=png" alt=""></p><h2 id="使用" tabindex="-1"><a class="header-anchor" href="#使用" aria-hidden="true">#</a> 使用</h2><blockquote><p>下面我们来体验下Beekeeper Studio，看看它是不是够好用！</p></blockquote><h3 id="外观设置" tabindex="-1"><a class="header-anchor" href="#外观设置" aria-hidden="true">#</a> 外观设置</h3><p>我们可以通过顶部的<code>View</code>菜单按钮进行字体大小和主题设置，我们把它切换到更炫酷的深色主题。</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/CKvMdchsUwkm2gfiaJAsqpn0skbVhpgQTEWTCkFaaUO3XwpKCdTfQ3HdzttPVK8Jn32Wc09cYlkh9m2kFE23Q1g/640?wx_fmt=png" alt=""></p><h3 id="创建数据源" tabindex="-1"><a class="header-anchor" href="#创建数据源" aria-hidden="true">#</a> 创建数据源</h3><ul><li>我们可以通过顶部的<code>New Connection</code>按钮来创建数据源，这里我们可以发现Beekeeper Studio仅支持常用的几种关系型数据库；</li></ul><p><img src="https://mmbiz.qpic.cn/mmbiz_png/CKvMdchsUwkm2gfiaJAsqpn0skbVhpgQTadK2JWprViaP3YribzustJsOMicKAGdnj9WAytEthrsj6F4HQznicVLibqA/640?wx_fmt=png" alt=""></p><ul><li>这里我们创建一个MySQL连接，输入连接信息，然后点击保存按钮即可；</li></ul><p><img src="https://mmbiz.qpic.cn/mmbiz_png/CKvMdchsUwkm2gfiaJAsqpn0skbVhpgQT9Tr32dribnE2ib4VCmNjTm7wL1x5Oljt0a3pZibpcSscDDwmXicGX75qkg/640?wx_fmt=png" alt=""></p><ul><li>再点击<code>Connect</code>按钮，连接后选择好数据库就可以开始管理了，操作快捷键已经在下方提示了。</li></ul><p><img src="https://mmbiz.qpic.cn/mmbiz_png/CKvMdchsUwkm2gfiaJAsqpn0skbVhpgQTXnK2BFWkSvCl01mrbdusHp2qAJx6GNtNKzoLBloRky3x3Yy3J4lYpQ/640?wx_fmt=png" alt=""></p><h3 id="管理表操作" tabindex="-1"><a class="header-anchor" href="#管理表操作" aria-hidden="true">#</a> 管理表操作</h3><ul><li>右键表名点击菜单可以选择查看表中的数据；</li></ul><p><img src="https://mmbiz.qpic.cn/mmbiz_png/CKvMdchsUwkm2gfiaJAsqpn0skbVhpgQTyHiaAl2aBAyvH8s9XajJoH2fxl3k3nGeksV5HnmVN8zuZ7MSaRmv3Ow/640?wx_fmt=png" alt=""></p><ul><li>支持快捷查询各个字段相关数据，这功能还是挺实用的；</li></ul><p><img src="https://mmbiz.qpic.cn/mmbiz_png/CKvMdchsUwkm2gfiaJAsqpn0skbVhpgQTAhrgqLC0QlSlIRu0echHXziaRibzDaX4ONKsjm57zaY8HK7LH97EdHew/640?wx_fmt=png" alt=""></p><ul><li>右键菜单还可以查看表结构，管理字段还是挺方便的；</li></ul><p><img src="https://mmbiz.qpic.cn/mmbiz_png/CKvMdchsUwkm2gfiaJAsqpn0skbVhpgQTPfohLdFpuT7dcsBuXb3jPnHooiamUs3oTDp4mkqNFXDrEZf9HVHiaKjg/640?wx_fmt=png" alt=""></p><ul><li>右键菜单还可以查看表的创建语句，这SQL主题样式，确实挺漂亮的；</li></ul><p><img src="https://mmbiz.qpic.cn/mmbiz_png/CKvMdchsUwkm2gfiaJAsqpn0skbVhpgQTuEsdn8kbFbIunWib1ibJQyoasnA40AmDJJNWHJ0xaao0wNmrhrrXXia2g/640?wx_fmt=png" alt=""></p><ul><li>右键菜单还支持导出表中数据，支持多种格式。</li></ul><p><img src="https://mmbiz.qpic.cn/mmbiz_png/CKvMdchsUwkm2gfiaJAsqpn0skbVhpgQTu0aEwsvaOFZjPeWzWroMeFv6ZQArMJajY3Cmw745YJ71dMxxnoIfdg/640?wx_fmt=png" alt=""></p><h3 id="sql操作" tabindex="-1"><a class="header-anchor" href="#sql操作" aria-hidden="true">#</a> SQL操作</h3><ul><li>在使用Beekeeper Studio的编辑器写SQL的时候，支持SQL语法高亮，对数据库表和字段都可以自动提示；</li></ul><p><img src="https://mmbiz.qpic.cn/mmbiz_gif/CKvMdchsUwkm2gfiaJAsqpn0skbVhpgQTiaExjiamHxcPufDiatD5Tw0f5D06tkTAe1zAAlrwMiaGIgB3aUnDSKhWjQ/640?wx_fmt=gif" alt=""></p><ul><li>我们还可以通过保存按钮来保存需要的SQL语句；</li></ul><p><img src="https://mmbiz.qpic.cn/mmbiz_png/CKvMdchsUwkm2gfiaJAsqpn0skbVhpgQT1xKHc9l7yibKN8l9iakW2lHVEWsla1Y24KiaauAribNYo7gY1CotT6NKPQ/640?wx_fmt=png" alt=""></p><ul><li>然后点击左侧按钮就可以查看保存的SQL语句了；</li></ul><p><img src="https://mmbiz.qpic.cn/mmbiz_png/CKvMdchsUwkm2gfiaJAsqpn0skbVhpgQTslsksZlSv7kvFoPCpK6khibiaA7k6jUQ2VcmY0N1CbS4rhGpo9qn6ticg/640?wx_fmt=png" alt=""></p><ul><li>通过左侧按钮我们还可以查看执行SQL的历史记录。</li></ul><p><img src="https://mmbiz.qpic.cn/mmbiz_png/CKvMdchsUwkm2gfiaJAsqpn0skbVhpgQTvtAMcPia13E5PCaguEhmSRyBrE1E1iblNfHIkquTRr8bG9ZgEt1fUboA/640?wx_fmt=png" alt=""></p><h2 id="总结" tabindex="-1"><a class="header-anchor" href="#总结" aria-hidden="true">#</a> 总结</h2><p>刚看到Beekeeper Studio有点被惊艳到了，界面确实很炫酷，功能也基本够用。但是SQL提示能力比起DataGrip和Navicat来，确实有点弱。不能自动提示SQL语法，只能提示数据库表和字段，对于SQL老手来说应该问题不大。总的来说，Beekeeper Studio在开源数据库管理工具中，还是非常好用的一款，喜欢它界面的朋友可以试试！</p><h2 id="项目地址" tabindex="-1"><a class="header-anchor" href="#项目地址" aria-hidden="true">#</a> 项目地址</h2><p>https://github.com/beekeeper-studio/beekeeper-studio/</p><hr><p><strong>微信8.0将好友放开到了一万，小伙伴可以加我大号了，先到先得，再满就真没了</strong></p><p><strong>扫描下方二维码即可加我微信啦，<code>2022，抱团取暖，一起牛逼。</code></strong></p><p><img 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href="https://mp.weixin.qq.com/s?__biz=Mzg2OTA0Njk0OA==&amp;mid=2247519384&amp;idx=1&amp;sn=bc7e71af75350b755f04ca4178395b1a&amp;chksm=cea1c353f9d64a458f797696d4144b4d6e58639371a4612b8e4d106d83a66d2289e7b2cd7431&amp;token=660789642&amp;lang=zh_CN&amp;scene=21#wechat_redirect" target="_blank" rel="noopener noreferrer">《Java 面试指北》<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>来啦！这是一份教你如何更高效地准备面试的小册，涵盖常见八股文（系统设计、常见框架、分布式、高并发 ......）、优质面经等内容。</p><p>JavaGuide 在线阅读网站：https://javaguide.cn/</p></blockquote><p>你好，我是 Guide。</p><p>简单对<a href="https://mp.weixin.qq.com/s?__biz=Mzg2OTA0Njk0OA==&amp;mid=2247519201&amp;idx=1&amp;sn=b910e72ec34a1447ecece7e993bc977d&amp;chksm=cea1c42af9d64d3c69ba4849fc9175b26a2219d67c2aa6dabb7b73d95f4c41b8a9461e818243&amp;token=1878783075&amp;lang=zh_CN&amp;scene=21#wechat_redirect" target="_blank" rel="noopener noreferrer">知识星球<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>的球友分享的一些中小厂面经做了一下总结，准备面试或者想要跳槽的朋友可以拿来自测一下。</p><p>由于问题太多，我这里就不贴参考答案了，需要参考答案的朋友可以在下面 3 个资料中找到：</p><ul><li><a href="https://mp.weixin.qq.com/mp/appmsgalbum?__biz=Mzg2OTA0Njk0OA==&amp;action=getalbum&amp;album_id=1352302538565189634&amp;scene=173&amp;from_msgid=2247521040&amp;from_itemidx=1&amp;count=3&amp;nolastread=1#wechat_redirect" target="_blank" rel="noopener noreferrer">Java 面试题&amp;面经汇总<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s?__biz=Mzg2OTA0Njk0OA==&amp;mid=2247519384&amp;idx=1&amp;sn=bc7e71af75350b755f04ca4178395b1a&amp;chksm=cea1c353f9d64a458f797696d4144b4d6e58639371a4612b8e4d106d83a66d2289e7b2cd7431&amp;token=660789642&amp;lang=zh_CN&amp;scene=21#wechat_redirect" target="_blank" rel="noopener noreferrer">《Java 面试指北》<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li>JavaGuide 在线阅读网站：https://javaguide.cn/</li></ul><blockquote><p>以下面经来自<a href="https://mp.weixin.qq.com/s?__biz=Mzg2OTA0Njk0OA==&amp;mid=2247519201&amp;idx=1&amp;sn=b910e72ec34a1447ecece7e993bc977d&amp;chksm=cea1c42af9d64d3c69ba4849fc9175b26a2219d67c2aa6dabb7b73d95f4c41b8a9461e818243&amp;token=1878783075&amp;lang=zh_CN&amp;scene=21#wechat_redirect" target="_blank" rel="noopener noreferrer">知识星球<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>的 W 同学。</p></blockquote><h2 id="五八同城" tabindex="-1"><a class="header-anchor" href="#五八同城" aria-hidden="true">#</a> 五八同城</h2><ol><li>自我介绍。</li><li>说一下项目的技术栈。</li><li>项目中遇到了什么困难？怎么解决的？</li><li>MySQL 和 Redis 怎么保持数据一致?</li><li>RocketMQ 广播消息 丢失消息怎么办？</li><li>分布式事务了解吗？</li><li>说一下怎么实现的分布式事务？还有没有其他的解决方案？</li><li>RocketMQ 能做分布式事务吗？</li><li>并发事务带来了哪些问题?</li><li>问一下 MySQL 默认隔离级别，可以解决幻读吗？（考察 当前读 快照读 间隙锁 等）</li><li>MySQL 的隔离级别是基于锁实现的吗？</li><li>多个人给一个主播打赏怎么设计？我说是一个高并发写的操作，对一个记录频繁写，分批操作，比如 10 个记录 操作一次。他说这个方案可以 但是有 100 个记录 怎么去做一个一个操作呢？我说如果在一个进程可以 分多个线程分批。他说还是不够快 我们是用的 MQ 多个消费者 一个打赏就发一个消息</li><li><code>synchronized</code> 和 <code>volatile</code> 区别？</li><li><code>synchronized</code> 有了为什么还要 <code>ReentranLock</code> ，有啥不一样？</li><li>接口和抽象类有什么区别？</li><li>泛型有啥用？泛型擦除是啥？</li></ol><p>总结：整体上 先问项目问项目依赖的中间件，问技术方案怎么设计，比较符合开发场景，MysSQL 间隙锁需要补充一下</p><p>最后点评：项目和技术广度很好 但是深度不够，说 MySQL 间隙锁不是很熟悉</p><h2 id="上海中通" tabindex="-1"><a class="header-anchor" href="#上海中通" aria-hidden="true">#</a> 上海中通</h2><ol><li>讲一下 <code>ArrayList</code> 和 <code>HashMap</code> 底层数据结构，优缺点，使用方式。</li><li><code>ConcurrentHashMap</code>有用过吗？</li><li>CAS 设计思路和原理？</li><li><code>ThreadLocal</code> 底层原理？什么场景使用的 <code>ThreadLocal</code>？</li><li>用到了 Java 8 的哪些新特性？</li><li>Lambda 怎么用的，Stream 的实现原理？</li><li>除了刚刚的场景 还有什么场景使用过异步任务，并发任务计算结果后做聚合 么做？</li><li>网络编程用过吗？IO 讲一下</li><li>你开发中都用到了什么设计模式？</li><li>工厂模式的设计理念是什么？有什么好处？体现了什么编程思想？</li><li>适配器模式了解吗？策略和适配器模式有什么区别，你为什么选择用策略模式而不是适配器原因是什么？</li><li>JVM 调优经验 说一下做了什么？</li><li>Spring 事务注解 <code>Transaction</code> 实现原理？</li><li>A 方法调用 B 方法，如果 B 方法开启事务 则直接用 B 方法的事务，如果是你,你怎么设计怎么做？</li><li>InnoDB 的默认隔离级别，可重复读，解决了什么问题，没有解决什么问题？</li><li>什么场景下使用了 ES？</li><li>倒排索引 是什么讲一下？</li><li>为什么 ES 检索比较快？</li><li>你使用 MQ（RocketMQ 和 Kafka）的应用场景什么？</li><li>你说系统单接口 qps 达到了 8W 你做了性能优化，这个是怎么做的？本地缓存用了什么删除策略？本地缓存设置了多大？</li><li>做了重试保证订单的最终一致性 这个是怎么做的重试？</li><li>MQ 消息积压遇到过吗？你是怎么处理这个？</li></ol><blockquote><p>以下面经来自<a href="https://mp.weixin.qq.com/s?__biz=Mzg2OTA0Njk0OA==&amp;mid=2247519201&amp;idx=1&amp;sn=b910e72ec34a1447ecece7e993bc977d&amp;chksm=cea1c42af9d64d3c69ba4849fc9175b26a2219d67c2aa6dabb7b73d95f4c41b8a9461e818243&amp;token=1878783075&amp;lang=zh_CN&amp;scene=21#wechat_redirect" target="_blank" rel="noopener noreferrer">知识星球<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>的傅晓海同学。</p></blockquote><h2 id="上海安硕信息" tabindex="-1"><a class="header-anchor" href="#上海安硕信息" aria-hidden="true">#</a> 上海安硕信息</h2><ol><li>Dubbo 使用的注册中心和推荐的协议</li><li>Redis 的具体应用</li><li>Spring 的常用注解</li><li>MySQL 的默认数据库引擎</li><li>MySQL 支持哪些存储引擎？默认使用哪个？</li><li>MyISAM 和 InnoDB 的区别是什么？</li><li>看毕设</li></ol><h2 id="上海地听" tabindex="-1"><a class="header-anchor" href="#上海地听" aria-hidden="true">#</a> 上海地听</h2><ol><li>什么是多态？</li><li>JSP 内置对象有哪些？</li><li>什么是跨域问题?如何解决?</li><li>一个 Tomcat 上发布两个项目,一个端口 80,一个 81,相互之间调用算不算跨域</li><li>说说索引和主键的用途。</li><li>MyBatis 中 <code>#{}</code> 和 <code>${}</code> 的区别?</li><li>单例模式的实现。</li><li>链表和队列的特点，查询和增删改的时间复杂度。</li><li>Spring 的常用注解</li><li><code>@Required</code> 注解的作用</li><li>如果有一条 SQL 语句执行的很慢,怎么进行优化?</li><li>存储过程是什么,有什么特点?</li></ol><h2 id="南京浩鲸科技" tabindex="-1"><a class="header-anchor" href="#南京浩鲸科技" aria-hidden="true">#</a> 南京浩鲸科技</h2><ol><li>常用的数据结构有哪些？</li><li>数组和链表的区别，以及获取元素的时间复杂度</li><li>线程池的特点和具体实现，线程的状态，</li><li><code>notify()</code> 和 <code>notifyall()</code> 的区别</li><li>MySQL 索引的分类</li><li>什么是视图</li><li>事务的隔离级别以及解决了哪些问题</li><li>IOC 源码</li><li>Spring 常用注解和作用</li><li>AoP 的具体应用</li><li>Spring 事务</li></ol><h2 id="上海华讯" tabindex="-1"><a class="header-anchor" href="#上海华讯" aria-hidden="true">#</a> 上海华讯</h2><ol><li>接口和抽象类的区别</li><li>内部类有哪些以及特点和应用</li><li>数组和链表</li><li>快速排序算法</li><li>异常的处理方式</li><li><code>HashMap</code> 的底层数据结构</li><li><code>hashcode</code> 的作用，如果 <code>hashcode</code> 相同，怎么存入元素</li><li>内连接和外连接的区别</li><li>分组查询的关键字</li><li>如何开启慢查询日志</li><li>数据库优化技巧</li><li>索引的分类</li><li>主键索引和唯一索引的区别</li><li>Spring 通过注解实现 DI 的原理</li><li>什么是 RESTful 风格</li><li>Spring 和 Mybatis 整合的步骤</li><li>Mybatis 执行流程</li></ol><p><strong>·········· END ··············</strong></p><p>欢迎加入我的<a href="https://mp.weixin.qq.com/s?__biz=Mzg2OTA0Njk0OA==&amp;mid=2247519201&amp;idx=1&amp;sn=b910e72ec34a1447ecece7e993bc977d&amp;chksm=cea1c42af9d64d3c69ba4849fc9175b26a2219d67c2aa6dabb7b73d95f4c41b8a9461e818243&amp;token=1878783075&amp;lang=zh_CN&amp;scene=21#wechat_redirect" target="_blank" rel="noopener noreferrer">知识星球<span><svg class="external-link-icon" 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class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-zhongxcwbztashjjavahdmj.html#五八同城" class="router-link-active router-link-exact-active toc-link level2">五八同城</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-zhongxcwbztashjjavahdmj.html#上海中通" class="router-link-active router-link-exact-active toc-link level2">上海中通</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-zhongxcwbztashjjavahdmj.html#上海安硕信息" class="router-link-active router-link-exact-active toc-link level2">上海安硕信息</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-zhongxcwbztashjjavahdmj.html#上海地听" class="router-link-active router-link-exact-active toc-link level2">上海地听</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-zhongxcwbztashjjavahdmj.html#南京浩鲸科技" class="router-link-active router-link-exact-active toc-link level2">南京浩鲸科技</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-zhongxcwbztashjjavahdmj.html#上海华讯" class="router-link-active router-link-exact-active toc-link level2">上海华讯</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><blockquote><p><a href="https://mp.weixin.qq.com/s?__biz=Mzg2OTA0Njk0OA==&amp;mid=2247519384&amp;idx=1&amp;sn=bc7e71af75350b755f04ca4178395b1a&amp;chksm=cea1c353f9d64a458f797696d4144b4d6e58639371a4612b8e4d106d83a66d2289e7b2cd7431&amp;token=660789642&amp;lang=zh_CN&amp;scene=21#wechat_redirect" target="_blank" rel="noopener noreferrer">《Java 面试指北》<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>来啦！这是一份教你如何更高效地准备面试的小册，涵盖常见八股文（系统设计、常见框架、分布式、高并发 ......）、优质面经等内容。</p><p>JavaGuide 在线阅读网站：https://javaguide.cn/</p></blockquote><p>你好，我是 Guide。</p><p>简单对<a href="https://mp.weixin.qq.com/s?__biz=Mzg2OTA0Njk0OA==&amp;mid=2247519201&amp;idx=1&amp;sn=b910e72ec34a1447ecece7e993bc977d&amp;chksm=cea1c42af9d64d3c69ba4849fc9175b26a2219d67c2aa6dabb7b73d95f4c41b8a9461e818243&amp;token=1878783075&amp;lang=zh_CN&amp;scene=21#wechat_redirect" target="_blank" rel="noopener noreferrer">知识星球<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>的球友分享的一些中小厂面经做了一下总结，准备面试或者想要跳槽的朋友可以拿来自测一下。</p><p>由于问题太多，我这里就不贴参考答案了，需要参考答案的朋友可以在下面 3 个资料中找到：</p><ul><li><a href="https://mp.weixin.qq.com/mp/appmsgalbum?__biz=Mzg2OTA0Njk0OA==&amp;action=getalbum&amp;album_id=1352302538565189634&amp;scene=173&amp;from_msgid=2247521040&amp;from_itemidx=1&amp;count=3&amp;nolastread=1#wechat_redirect" target="_blank" rel="noopener noreferrer">Java 面试题&amp;面经汇总<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s?__biz=Mzg2OTA0Njk0OA==&amp;mid=2247519384&amp;idx=1&amp;sn=bc7e71af75350b755f04ca4178395b1a&amp;chksm=cea1c353f9d64a458f797696d4144b4d6e58639371a4612b8e4d106d83a66d2289e7b2cd7431&amp;token=660789642&amp;lang=zh_CN&amp;scene=21#wechat_redirect" target="_blank" rel="noopener noreferrer">《Java 面试指北》<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li>JavaGuide 在线阅读网站：https://javaguide.cn/</li></ul><blockquote><p>以下面经来自<a href="https://mp.weixin.qq.com/s?__biz=Mzg2OTA0Njk0OA==&amp;mid=2247519201&amp;idx=1&amp;sn=b910e72ec34a1447ecece7e993bc977d&amp;chksm=cea1c42af9d64d3c69ba4849fc9175b26a2219d67c2aa6dabb7b73d95f4c41b8a9461e818243&amp;token=1878783075&amp;lang=zh_CN&amp;scene=21#wechat_redirect" target="_blank" rel="noopener noreferrer">知识星球<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>的 W 同学。</p></blockquote><h2 id="五八同城" tabindex="-1"><a class="header-anchor" href="#五八同城" aria-hidden="true">#</a> 五八同城</h2><ol><li>自我介绍。</li><li>说一下项目的技术栈。</li><li>项目中遇到了什么困难？怎么解决的？</li><li>MySQL 和 Redis 怎么保持数据一致?</li><li>RocketMQ 广播消息 丢失消息怎么办？</li><li>分布式事务了解吗？</li><li>说一下怎么实现的分布式事务？还有没有其他的解决方案？</li><li>RocketMQ 能做分布式事务吗？</li><li>并发事务带来了哪些问题?</li><li>问一下 MySQL 默认隔离级别，可以解决幻读吗？（考察 当前读 快照读 间隙锁 等）</li><li>MySQL 的隔离级别是基于锁实现的吗？</li><li>多个人给一个主播打赏怎么设计？我说是一个高并发写的操作，对一个记录频繁写，分批操作，比如 10 个记录 操作一次。他说这个方案可以 但是有 100 个记录 怎么去做一个一个操作呢？我说如果在一个进程可以 分多个线程分批。他说还是不够快 我们是用的 MQ 多个消费者 一个打赏就发一个消息</li><li><code>synchronized</code> 和 <code>volatile</code> 区别？</li><li><code>synchronized</code> 有了为什么还要 <code>ReentranLock</code> ，有啥不一样？</li><li>接口和抽象类有什么区别？</li><li>泛型有啥用？泛型擦除是啥？</li></ol><p>总结：整体上 先问项目问项目依赖的中间件，问技术方案怎么设计，比较符合开发场景，MysSQL 间隙锁需要补充一下</p><p>最后点评：项目和技术广度很好 但是深度不够，说 MySQL 间隙锁不是很熟悉</p><h2 id="上海中通" tabindex="-1"><a class="header-anchor" href="#上海中通" aria-hidden="true">#</a> 上海中通</h2><ol><li>讲一下 <code>ArrayList</code> 和 <code>HashMap</code> 底层数据结构，优缺点，使用方式。</li><li><code>ConcurrentHashMap</code>有用过吗？</li><li>CAS 设计思路和原理？</li><li><code>ThreadLocal</code> 底层原理？什么场景使用的 <code>ThreadLocal</code>？</li><li>用到了 Java 8 的哪些新特性？</li><li>Lambda 怎么用的，Stream 的实现原理？</li><li>除了刚刚的场景 还有什么场景使用过异步任务，并发任务计算结果后做聚合 么做？</li><li>网络编程用过吗？IO 讲一下</li><li>你开发中都用到了什么设计模式？</li><li>工厂模式的设计理念是什么？有什么好处？体现了什么编程思想？</li><li>适配器模式了解吗？策略和适配器模式有什么区别，你为什么选择用策略模式而不是适配器原因是什么？</li><li>JVM 调优经验 说一下做了什么？</li><li>Spring 事务注解 <code>Transaction</code> 实现原理？</li><li>A 方法调用 B 方法，如果 B 方法开启事务 则直接用 B 方法的事务，如果是你,你怎么设计怎么做？</li><li>InnoDB 的默认隔离级别，可重复读，解决了什么问题，没有解决什么问题？</li><li>什么场景下使用了 ES？</li><li>倒排索引 是什么讲一下？</li><li>为什么 ES 检索比较快？</li><li>你使用 MQ（RocketMQ 和 Kafka）的应用场景什么？</li><li>你说系统单接口 qps 达到了 8W 你做了性能优化，这个是怎么做的？本地缓存用了什么删除策略？本地缓存设置了多大？</li><li>做了重试保证订单的最终一致性 这个是怎么做的重试？</li><li>MQ 消息积压遇到过吗？你是怎么处理这个？</li></ol><blockquote><p>以下面经来自<a href="https://mp.weixin.qq.com/s?__biz=Mzg2OTA0Njk0OA==&amp;mid=2247519201&amp;idx=1&amp;sn=b910e72ec34a1447ecece7e993bc977d&amp;chksm=cea1c42af9d64d3c69ba4849fc9175b26a2219d67c2aa6dabb7b73d95f4c41b8a9461e818243&amp;token=1878783075&amp;lang=zh_CN&amp;scene=21#wechat_redirect" target="_blank" rel="noopener noreferrer">知识星球<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>的傅晓海同学。</p></blockquote><h2 id="上海安硕信息" tabindex="-1"><a class="header-anchor" href="#上海安硕信息" aria-hidden="true">#</a> 上海安硕信息</h2><ol><li>Dubbo 使用的注册中心和推荐的协议</li><li>Redis 的具体应用</li><li>Spring 的常用注解</li><li>MySQL 的默认数据库引擎</li><li>MySQL 支持哪些存储引擎？默认使用哪个？</li><li>MyISAM 和 InnoDB 的区别是什么？</li><li>看毕设</li></ol><h2 id="上海地听" tabindex="-1"><a class="header-anchor" href="#上海地听" aria-hidden="true">#</a> 上海地听</h2><ol><li>什么是多态？</li><li>JSP 内置对象有哪些？</li><li>什么是跨域问题?如何解决?</li><li>一个 Tomcat 上发布两个项目,一个端口 80,一个 81,相互之间调用算不算跨域</li><li>说说索引和主键的用途。</li><li>MyBatis 中 <code>#{}</code> 和 <code>${}</code> 的区别?</li><li>单例模式的实现。</li><li>链表和队列的特点，查询和增删改的时间复杂度。</li><li>Spring 的常用注解</li><li><code>@Required</code> 注解的作用</li><li>如果有一条 SQL 语句执行的很慢,怎么进行优化?</li><li>存储过程是什么,有什么特点?</li></ol><h2 id="南京浩鲸科技" tabindex="-1"><a class="header-anchor" href="#南京浩鲸科技" aria-hidden="true">#</a> 南京浩鲸科技</h2><ol><li>常用的数据结构有哪些？</li><li>数组和链表的区别，以及获取元素的时间复杂度</li><li>线程池的特点和具体实现，线程的状态，</li><li><code>notify()</code> 和 <code>notifyall()</code> 的区别</li><li>MySQL 索引的分类</li><li>什么是视图</li><li>事务的隔离级别以及解决了哪些问题</li><li>IOC 源码</li><li>Spring 常用注解和作用</li><li>AoP 的具体应用</li><li>Spring 事务</li></ol><h2 id="上海华讯" tabindex="-1"><a class="header-anchor" href="#上海华讯" aria-hidden="true">#</a> 上海华讯</h2><ol><li>接口和抽象类的区别</li><li>内部类有哪些以及特点和应用</li><li>数组和链表</li><li>快速排序算法</li><li>异常的处理方式</li><li><code>HashMap</code> 的底层数据结构</li><li><code>hashcode</code> 的作用，如果 <code>hashcode</code> 相同，怎么存入元素</li><li>内连接和外连接的区别</li><li>分组查询的关键字</li><li>如何开启慢查询日志</li><li>数据库优化技巧</li><li>索引的分类</li><li>主键索引和唯一索引的区别</li><li>Spring 通过注解实现 DI 的原理</li><li>什么是 RESTful 风格</li><li>Spring 和 Mybatis 整合的步骤</li><li>Mybatis 执行流程</li></ol><p><strong>·········· END ··············</strong></p><p>欢迎加入我的<a href="https://mp.weixin.qq.com/s?__biz=Mzg2OTA0Njk0OA==&amp;mid=2247519201&amp;idx=1&amp;sn=b910e72ec34a1447ecece7e993bc977d&amp;chksm=cea1c42af9d64d3c69ba4849fc9175b26a2219d67c2aa6dabb7b73d95f4c41b8a9461e818243&amp;token=1878783075&amp;lang=zh_CN&amp;scene=21#wechat_redirect" target="_blank" rel="noopener noreferrer">知识星球<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>获取更多面试干货，<a href="https://mp.weixin.qq.com/s?__biz=Mzg2OTA0Njk0OA==&amp;mid=2247519384&amp;idx=1&amp;sn=bc7e71af75350b755f04ca4178395b1a&amp;chksm=cea1c353f9d64a458f797696d4144b4d6e58639371a4612b8e4d106d83a66d2289e7b2cd7431&amp;token=660789642&amp;lang=zh_CN&amp;scene=21#wechat_redirect" target="_blank" rel="noopener noreferrer">《Java 面试指北》<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>持续更新完善中！</p><p><img src="https://mmbiz.qpic.cn/mmbiz_png/iaIdQfEric9TyGIdWmVOht6AvFIs6gqH9ZgaajiaKxicyza3eq3PWjcRRrSxSFQicFBkkQUORWxYibtsWHlHqLjhic9Sg/640?wx_fmt=png" alt=""></p><p>《Java 面试指北》目录</p><p>近期文章精选 ：</p><ul><li><a href="https://mp.weixin.qq.com/s?__biz=Mzg2OTA0Njk0OA==&amp;mid=2247521303&amp;idx=1&amp;sn=4b61fcc28bb3c92732f7e92bbbe7e60b&amp;chksm=cea1dbdcf9d652ca2aad9e505908a33e246f375e6cdf482b11882e3f8b843e83c8615142cd0f&amp;token=538611389&amp;lang=zh_CN&amp;scene=21#wechat_redirect" target="_blank" rel="noopener noreferrer">今年找工作有点难！<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 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pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年5月30日</span><meta property="datePublished" content="2022-05-30T14:29:10.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" 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213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 3 分钟</span><meta property="timeRequired" content="PT3M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-zuixinbujiabandigongsimingdan.html#说明" class="router-link-active router-link-exact-active toc-link level2">说明</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-zuixinbujiabandigongsimingdan.html#_955-的公司名单" class="router-link-active router-link-exact-active toc-link level2">955 的公司名单</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><p>这是github上的一个开源项目：955.WLB，上面列举了程序员们汇总的 955 作息的公司名单，旨在促进码农的工作生活平衡，文末「阅读原文」附上了 github 项目地址，感兴趣可以看看。</p><ul><li>996 工作制：即每天早 9 点到岗，一直工作到晚上 9 点。每周工作 6 天。</li><li>955 工作制：即每天早 9 点到岗，一直工作到下午 5 点。每周工作 5 天。</li><li>944 工作制：即每天上午 9 点到岗，一直工作到下午 4 点。每周工作 4 天。</li></ul><h2 id="说明" tabindex="-1"><a class="header-anchor" href="#说明" aria-hidden="true">#</a> 说明</h2><p>以下公司名单，基本不属于 996 的公司，相对接近 955/965 的水平，但是依旧要看部门和地区，不能保证完全准确性。</p><ul><li>不能保证所有部门都是 955/10-6-5/965/10-7-5 的水平</li><li>就算部门的平均水平是 955/10-6-5/965/10-7-5，也有可能部分时间要加班</li><li>名单中部分公司的部分部门可能有 975 甚至 985 的情况，不要以偏概全</li><li>名单中部分公司的部分甚至较多部门可能有 945、10-5-5 或者 11-6-5 的情况，我们也把他们加入在名单中</li></ul><blockquote><p>另外，统计一定不完全，欢迎各位同行留言补充，务求真实！</p></blockquote><h2 id="_955-的公司名单" tabindex="-1"><a class="header-anchor" href="#_955-的公司名单" aria-hidden="true">#</a> 955 的公司名单</h2><ul><li>Afterpay - 上海</li><li>Amazon - 北京/上海</li><li>AMD - 上海</li><li>ARM - 上海</li><li>Airbnb - 北京</li><li>Apple - 北京/上海</li><li>ArcSoft - 杭州</li><li>Autodesk - 北京/上海</li></ul><p>-Booking - 上海</p><ul><li>Calix - 南京</li><li>Citrix - 南京</li><li>Cisco - 北京/上海/杭州/苏州</li><li>Coolapk (酷安) - 北京/深圳</li><li>Coupang - 北京/上海</li><li>CSTC (花旗金融) - 上海</li><li>Dell - 上海</li><li>Douban (豆瓣) - 北京</li><li>eBay - 上海</li><li>eHealth - 厦门</li><li>Electronic Arts - 上海</li><li>EMC - 上海</li><li>Ericsson - 上海</li><li>Flexport - 上海/深圳</li><li>FreeWheel - 北京</li><li>GE - 上海</li><li>Google - 北京/上海</li><li>Grab - 北京</li><li>Honeywell - 上海</li><li>HP - 上海</li><li>HSBC - 上海/广州/西安</li><li>Hulu - 北京</li><li>IBM (GBS除外) - 上海</li><li>iHerb - 上海</li><li>Intel - 上海/深圳</li><li>LeetCode - 上海</li><li>Linkedin - 北京</li><li>Micro Focus - 上海</li><li>Microsoft - 北京/上海/苏州</li><li>MicroStrategy - 杭州</li><li>National Instruments - 上海</li><li>Nokia - 南京/杭州</li><li>NVIDIA - 北京/上海</li><li>Oracle - 上海</li><li>PayPal - 上海</li><li>Pivotal - 北京/上海</li><li>Qualcomm - 北京/上海</li><li>Red Hat - 北京/上海/深圳/西安/remote</li><li>RingCentral - 厦门/杭州/香港</li><li>SAP - 上海</li><li>Shopee - 北京/上海/深圳</li><li>SmartNews - 北京/上海</li><li>Snap - 北京/深圳</li><li>State Street - 杭州</li><li>SUSE - 北京/上海/深圳</li><li>ThoughtWorks - 西安/北京/深圳/成都/武汉/上海/香港</li><li>Trend Micro - 南京</li><li>TuSimple - 北京/上海</li><li>Ubisoft - 上海</li><li>Unity - 上海</li><li>Vipshop (唯品会) - 上海</li><li>VMware - 北京/上海</li><li>WeWork - 上海</li><li>Wish - 上海</li><li>Works Applications - 上海</li><li>XMind - 深圳</li><li>Zhihu (知乎) - 北京</li><li>Zoom - 合肥/杭州/苏州</li></ul><blockquote><p>良好的行业风气有助于各位同行发展，为这类企业点赞！</p></blockquote><p><img src="https://mmbiz.qpic.cn/mmbiz_jpg/icmWrEONNM8XatxbCxk8v6frsbtPJg9XAicBOPflHOdlPYtCcNFmPqnB4iafDDXYuria2Bcib0noeyUiayxgPXbI8Y7g/640?wx_fmt=jpeg" alt=""></p><p>你好，我是公子龙，毕业于中科院，前大型计算机竞赛冠军，现大厂工程师，拿过九家大厂的 offer 。</p><p>北漂七年，从小白到计算机竞赛冠军，读研时通过实习和比赛收入 50 万，<a 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clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->最新 955 不加班的公司名单</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年5月30日</span><meta property="datePublished" content="2022-05-30T14:29:10.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 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fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 3 分钟</span><meta property="timeRequired" content="PT3M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-zuixinbujiabandigongsimingdan.html#说明" class="router-link-active router-link-exact-active toc-link level2">说明</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/weixin-zuixinbujiabandigongsimingdan.html#_955-的公司名单" class="router-link-active router-link-exact-active toc-link level2">955 的公司名单</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><p>这是github上的一个开源项目：955.WLB，上面列举了程序员们汇总的 955 作息的公司名单，旨在促进码农的工作生活平衡，文末「阅读原文」附上了 github 项目地址，感兴趣可以看看。</p><ul><li>996 工作制：即每天早 9 点到岗，一直工作到晚上 9 点。每周工作 6 天。</li><li>955 工作制：即每天早 9 点到岗，一直工作到下午 5 点。每周工作 5 天。</li><li>944 工作制：即每天上午 9 点到岗，一直工作到下午 4 点。每周工作 4 天。</li></ul><h2 id="说明" tabindex="-1"><a class="header-anchor" href="#说明" aria-hidden="true">#</a> 说明</h2><p>以下公司名单，基本不属于 996 的公司，相对接近 955/965 的水平，但是依旧要看部门和地区，不能保证完全准确性。</p><ul><li>不能保证所有部门都是 955/10-6-5/965/10-7-5 的水平</li><li>就算部门的平均水平是 955/10-6-5/965/10-7-5，也有可能部分时间要加班</li><li>名单中部分公司的部分部门可能有 975 甚至 985 的情况，不要以偏概全</li><li>名单中部分公司的部分甚至较多部门可能有 945、10-5-5 或者 11-6-5 的情况，我们也把他们加入在名单中</li></ul><blockquote><p>另外，统计一定不完全，欢迎各位同行留言补充，务求真实！</p></blockquote><h2 id="_955-的公司名单" tabindex="-1"><a class="header-anchor" href="#_955-的公司名单" aria-hidden="true">#</a> 955 的公司名单</h2><ul><li>Afterpay - 上海</li><li>Amazon - 北京/上海</li><li>AMD - 上海</li><li>ARM - 上海</li><li>Airbnb - 北京</li><li>Apple - 北京/上海</li><li>ArcSoft - 杭州</li><li>Autodesk - 北京/上海</li></ul><p>-Booking - 上海</p><ul><li>Calix - 南京</li><li>Citrix - 南京</li><li>Cisco - 北京/上海/杭州/苏州</li><li>Coolapk (酷安) - 北京/深圳</li><li>Coupang - 北京/上海</li><li>CSTC (花旗金融) - 上海</li><li>Dell - 上海</li><li>Douban (豆瓣) - 北京</li><li>eBay - 上海</li><li>eHealth - 厦门</li><li>Electronic Arts - 上海</li><li>EMC - 上海</li><li>Ericsson - 上海</li><li>Flexport - 上海/深圳</li><li>FreeWheel - 北京</li><li>GE - 上海</li><li>Google - 北京/上海</li><li>Grab - 北京</li><li>Honeywell - 上海</li><li>HP - 上海</li><li>HSBC - 上海/广州/西安</li><li>Hulu - 北京</li><li>IBM (GBS除外) - 上海</li><li>iHerb - 上海</li><li>Intel - 上海/深圳</li><li>LeetCode - 上海</li><li>Linkedin - 北京</li><li>Micro Focus - 上海</li><li>Microsoft - 北京/上海/苏州</li><li>MicroStrategy - 杭州</li><li>National Instruments - 上海</li><li>Nokia - 南京/杭州</li><li>NVIDIA - 北京/上海</li><li>Oracle - 上海</li><li>PayPal - 上海</li><li>Pivotal - 北京/上海</li><li>Qualcomm - 北京/上海</li><li>Red Hat - 北京/上海/深圳/西安/remote</li><li>RingCentral - 厦门/杭州/香港</li><li>SAP - 上海</li><li>Shopee - 北京/上海/深圳</li><li>SmartNews - 北京/上海</li><li>Snap - 北京/深圳</li><li>State Street - 杭州</li><li>SUSE - 北京/上海/深圳</li><li>ThoughtWorks - 西安/北京/深圳/成都/武汉/上海/香港</li><li>Trend Micro - 南京</li><li>TuSimple - 北京/上海</li><li>Ubisoft - 上海</li><li>Unity - 上海</li><li>Vipshop (唯品会) - 上海</li><li>VMware - 北京/上海</li><li>WeWork - 上海</li><li>Wish - 上海</li><li>Works Applications - 上海</li><li>XMind - 深圳</li><li>Zhihu (知乎) - 北京</li><li>Zoom - 合肥/杭州/苏州</li></ul><blockquote><p>良好的行业风气有助于各位同行发展，为这类企业点赞！</p></blockquote><p><img src="https://mmbiz.qpic.cn/mmbiz_jpg/icmWrEONNM8XatxbCxk8v6frsbtPJg9XAicBOPflHOdlPYtCcNFmPqnB4iafDDXYuria2Bcib0noeyUiayxgPXbI8Y7g/640?wx_fmt=jpeg" alt=""></p><p>你好，我是公子龙，毕业于中科院，前大型计算机竞赛冠军，现大厂工程师，拿过九家大厂的 offer 。</p><p>北漂七年，从小白到计算机竞赛冠军，读研时通过实习和比赛收入 50 万，<a href="http://mp.weixin.qq.com/s?__biz=MzIzNTI3MTQxMg==&amp;mid=2652539525&amp;idx=1&amp;sn=800a2b635fcc59813f9e7948b97fc636&amp;chksm=f3078f1ec4700608579e837cdf4da7d30f41e24a68f8e14f585f662d673d0108218d92b751ec&amp;scene=21#wechat_redirect" target="_blank" rel="noopener noreferrer"><strong>点击蓝字查看我的编程之路</strong>。<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" 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class="theme-hope-content"><p>2022年更新</p><p>前排高赞的回答比较适合科班大佬和本科出身好又数学好的同学。对于数学一般同学，或者本科差的同学，别刚热门985了，真的求稳吧。</p><p><strong>西安电子科技大学（计算机学院、人工院很卷</strong>，但是光电工程学院、电子工程学院不怎么卷，空间院还<strong>年年校内调剂</strong>）其他学院<strong>就业照样很好</strong>，性价比很高的。</p><p><img src="https://pic3.zhimg.com/50/v2-5c4bfb32c6a05f03a24a5ff12f46ca27_720w.jpg?source=1940ef5c" alt=""></p><p><img src="https://pic2.zhimg.com/50/v2-7edeed793c7ab2e52044b9f09bc0fdcc_720w.jpg?source=1940ef5c" alt=""></p><p><img src="https://pica.zhimg.com/50/v2-e6243589b56e053768060f4a327f5d01_720w.jpg?source=1940ef5c" alt=""></p><p><a href="https://link.zhihu.com/?target=https%3A//gr.xidian.edu.cn/info/1073/11637.htm" target="_blank" rel="noopener noreferrer"><span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><p><strong>注意：别只盯着计院和软院，只要是信息技术类专业就业都挺好，毕竟编程能力主要靠自己自学的。</strong></p><p>哈尔滨工程大学（工科院校名额多，几个学院都招计算机）</p><p>河北工业大学</p><p>中国地质大学武汉（要优秀生源？）</p><p>中国矿业大学（徐州）</p><p>福州大学（<strong>保护一志愿</strong>，进面试基本不刷人）</p><p>西南财经（名额少）</p><p>西南大学（往年复试只有面试，没有机试）</p><p>云南大学软件学院</p><p>广西大学</p><p>华中农业大学</p><p>大连海事大学</p><p>收调剂的新一流：<strong>宁波大学 天津工业 上海海洋</strong></p><p><strong>211师范类、文科类院校女生多：</strong></p><p>华南师范大学</p><p>南京师范大学</p><p>西北大学的现代教育技术中心</p><p>陕西师范大学</p><p>辽宁大学（名额较多）</p><p>华中师范大学的教育数据工程中心（两年制）</p><p><strong>华中师范大学伍伦贡联合学院</strong>（中外合作办学，两年制、一年8万，学费相对较低）</p><p>往年好考的985：西北工业大学软件学院（评论区说很卷了）。中央民族 中国海洋 西北农林 兰州大学 都是年年收调剂。</p><p><strong>中国科学院大学</strong>下面的各个计算机研究所全国都有，比985好考，实力强，待遇好，比如：人工智能院和深圳先进技术研究院，但是不喜欢跨考。</p><p>尽量选择水区省份。冷知识：京沪压个<strong>20分</strong>正常。</p><p>收调剂或者竞争小的双非：</p><p><strong>重庆邮电大学</strong>（就业不输211，别看报名人数两三千个，但是并不卷，<strong>最终录取分都不算高，专业课也不难</strong>）</p><p><strong>桂林电子科技大学</strong>（年年收调剂，<strong>在珠三角就业很好</strong>）</p><p><strong>西安邮电大学</strong>（虽然比不得西电，但是就业也很好，平均薪资排序大概是：西电、西交、西工大、西邮、长安大学、西北大学）</p><p>广东工业大学</p><p>广州大学（方院士了解一下）</p><p>汕头大学（<strong>年年收调剂</strong>）</p><p>昆明理工大学（名额多）</p><p>中国民航大学（调剂很火）</p><p>西安理工大学</p><p>杭州师范大学</p><p>浙江师范大学</p><p>浙江工业大学</p><p>南京工业大学</p><p>华侨大学（调剂名额多，调剂火）</p><p>北京语言大学（自然语言处理方向）</p><p>考研应届生与二战生的比例差几乎<strong>一比一</strong>，希望学弟学妹一步到位，别二战。考研不易，竞争越来越大，求稳，求稳，求稳，结合本科出身和学习能力（尤其<strong>数学</strong>）别盯着热门985不放。</p><p>尽量选专业课简单的学校，因为总分高好调剂，专业课简单可以把更多精力放在数学上。调剂很看本科出身，双非的同学更要求稳。</p><p>跨考担心复试的机试：先过初试，初试完准备来得及的。</p><p>求赞……求赞……求赞……</p><p>数二的内容是数一的<strong>七成</strong>，同样实力下，英二可以比英一多考个<strong>十二分</strong>。</p><p>科班大佬及自控力好学习能力好的学霸忽略以上。</p></div><!----><footer 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class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/zhihu-weismyrsyxkjgscxyzhdjyxz.html#一、银行分类" class="router-link-active router-link-exact-active toc-link level3">一、银行分类</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/zhihu-weismyrsyxkjgscxyzhdjyxz.html#二、根据层级分类" class="router-link-active router-link-exact-active toc-link level3">二、根据层级分类</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><p>本人20年秋招时投的银行还比较多，就是图稳定，钱少一点无所谓。目前已入职某银行总行科技信息部。</p><p>总结一下就是3点：<strong>稳定+薪资还行+没有营销压力</strong>。</p><p><strong>证券公司</strong>同理：西部证券，西南证券，长江证券，华泰证券，广发证券等等（基本<strong>每省</strong>都有一所证券公司）</p><p>**温馨提醒：**各省的证券公司IT部门待遇更高哦。</p><p><strong>待遇上：</strong></p><p><strong>1、整体上大银行的待遇＞中小银行</strong></p><p><strong>2、地方性银行总行的待遇＞国有行省级分行</strong></p><p><strong>稳定性：</strong></p><p>3家政策行＞6大国有行（总行+省级分行+市级支行）+地方城市银行、地方农商行＞12家股份制商业银行+科技子公司</p><h3 id="一、银行分类" tabindex="-1"><a class="header-anchor" href="#一、银行分类" aria-hidden="true">#</a> 一、银行分类</h3><p><strong>首先银行主要分为如下5类</strong>：</p><p><strong>3家</strong>政策性银行（国家开发银行、进出口银行、农业发展银行），总行+各省的省级分行</p><p><strong>6家</strong>中央管辖的国有行（中农工建交+邮储），结构为：总行+各省的省级分行</p><p><strong>12家</strong>全国性股份制商业银行(中信、华夏、招商、深发、光大、民生、浦发、渤海、广发、兴业、恒丰、浙商），结构为：总行+各省的省级分行</p><p><strong>已完成股份制改制</strong>的各省<strong>地方性</strong>城市银行+农村商业银行。</p><blockquote><p><strong>144家城市商业银行</strong>（南京银行、杭州银行、宁波银行、重庆银行、中原银行、北京银行、上海银行，四川银行等等），</p><p><strong>212家农村商业银行</strong>（北京农商银行、重庆农村商业银行、深圳农村商业银行、广州农村商业银行、上海农商银行等等），<strong>经营范围</strong>基本只在本省。</p></blockquote><p><strong>25家未改制</strong>的<strong>省级农信联社</strong>（贵州省农村信用社、河北省农村信用社联合社，辽宁省农村信用社联合社等），<strong>经营范围</strong>只在本省。</p><h3 id="二、根据层级分类" tabindex="-1"><a class="header-anchor" href="#二、根据层级分类" aria-hidden="true">#</a> 二、根据层级分类</h3><p><strong>银行科技信息岗分为以下几类</strong>：</p><p>整体上，总行下属<strong>科技信息部</strong>&gt;总行下属<strong>研发中心</strong>&gt;=<strong>省级分行</strong>&gt;=<strong>省会城市支行</strong>&gt;=<strong>科技子公司</strong>&gt;其他地级市支行。</p><p>还有些信用卡中心，数据中心我不了解就不说了。</p><p>1、<strong>总行下属的科技信息部</strong>。很少写代码，主要是做技术规划，做管理（管理外包）和运维，所以招人比研发中心少。</p><blockquote><p>**招聘要求：**一般211硕士起步，学历要求最高。</p><p><strong>稳定与待遇</strong>：稳定，拿总行平均绩效，待遇不差，看银行盈利水平，每个银行差异较大，入职税前15-28万之间，后续30万+。基本不加班，朝九晚五。</p></blockquote><p>2、<strong>总行部门下属的软件研发中心</strong>。<strong>专职写代码</strong>，招人比较多的：工行研发中心（西安成都珠海广州杭州北京），中行研发中心（西安合肥），农业银行研发中心（天津北京成都）。</p><blockquote><p><strong>招聘要求</strong>：一般211硕士起步，211&amp;985本科也可以，本科进去性价比高，学校好，基本上去了就要。</p><p><strong>稳定与待遇</strong>：稳定，但是待遇不太高，转正后大概税前15万-25万，根据职称涨薪资。要加班，加班多少看部门。</p></blockquote><p>3、<strong>全国性银行省分行的科技岗</strong>。全国性银行在每个省都有省分行，<strong>多数要写代码</strong>。</p><blockquote><p>**招聘要求：**硕士起步，或者211本科起步，每个省可能不一样。</p><p>**稳定与待遇：**稳定，薪资大概拿省分行平均工资，<strong>待遇看当地的经济情况（效益）</strong>，一般12-20万。广州和深圳，转正后就20多万，干三年，职级上去了，一年总包应该也是30万左右吧。加班看具体情况。</p></blockquote><p>4、<strong>省会城市支行</strong>的科技信息岗位。省分行下属管理各个地级市支行，地级市里当然<strong>省会城市</strong>待遇最好。<strong>一般不写代码</strong>。</p><blockquote><p>招聘要求：本科起步，省会城市竞争最大。</p><p><strong>稳定与待遇</strong>：稳定，薪资大概12万-20万。待遇看当地的<strong>盈利</strong>情况。<strong>省会支行待遇可能高于省分行</strong>。比如<strong>杭州支行</strong>待遇可能高于<strong>浙江省分行</strong>待遇。</p></blockquote><p>5、<strong>总行下属的科技子公司</strong>。银行内部的外包公司。比如招银网络科技，建信金融科技，中银金科，浙商银行的子公司“易企银”，兴业数金，专职写代码。</p><blockquote><p><strong>招聘要求</strong>：本科起步。</p><p><strong>稳定与待遇</strong>：稳定性肯定是下降了，但是待遇上去了，转正后一般税前20-28万。加班会比较多。优点：<strong>薪酬较高（20-30万），招聘量大</strong>。缺点：<strong>稳定性差，无行员编制，加班多，技术一般</strong>。</p></blockquote><p>6、<strong>非省会地级市分支行的科技岗</strong>。非省会地级市&amp;区县的科技岗，<strong>不写代码</strong>，干运维提需求这些。</p><blockquote><p><strong>招聘要求</strong>：本科。</p><p>**稳定与待遇：**稳定，待遇比较一般了，税前10万左右吧，看当地分行的效益拿平均绩效，一般在当地还是中上水平。</p></blockquote><p>**求职推荐：**3家政策性银行总部（国开行、农发行、进出口银行），最稳定。</p><p>农业银行，邮储银行（不是子公司同时待遇又高），渤海银行（天津有额外**20%**补充公积金）</p><p>杭州银行，宁波银行，四川银行。</p><p>深圳农商行，广州农商行，重庆农商行。</p><p>工行广东省分行，广州支行、深圳支行。</p><p><strong>不同银行、不同地区、不同部门差异很大的，具体问题具体分析，多上牛客，多看offershow，还有脉脉。想尽办法问到内部情况。</strong></p></div><!----><footer 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class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/zhihu-younxzdjsjzyxsjrdgq.html#一、首选证券公司" class="router-link-active router-link-exact-active toc-link level3">一、首选证券公司</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/zhihu-younxzdjsjzyxsjrdgq.html#二、各大银行" class="router-link-active router-link-exact-active toc-link level3">二、各大银行</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/zhihu-younxzdjsjzyxsjrdgq.html#三、烟草-国家电网-中石油-铁路集团" class="router-link-active router-link-exact-active toc-link level3">三、烟草+国家电网+中石油+铁路集团</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/zhihu-younxzdjsjzyxsjrdgq.html#四、军工相关的三家央企-航天科技-航天科工-电子科技集团" class="router-link-active router-link-exact-active toc-link level3">四、军工相关的三家央企：航天科技+航天科工+电子科技集团</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/zhihu-younxzdjsjzyxsjrdgq.html#五、军队" class="router-link-active router-link-exact-active toc-link level3">五、军队</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/zhihu-younxzdjsjzyxsjrdgq.html#六、医院信息科" class="router-link-active router-link-exact-active toc-link level3">六、医院信息科</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/nice-article/zhihu-younxzdjsjzyxsjrdgq.html#七、地方政府的平台公司" class="router-link-active router-link-exact-active toc-link level3">七、地方政府的平台公司</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h3 id="一、首选证券公司" tabindex="-1"><a class="header-anchor" href="#一、首选证券公司" aria-hidden="true">#</a> 一、首选证券公司</h3><p><strong>各省</strong>基本都有一所证券公司，沿海省份集中在税前30-40万左右，内地集中在20-30万。很少加班，多数为国企，一般要求硕士。</p><p><img src="https://pic1.zhimg.com/50/v2-d737dbbdd51bc05f8ef164e01a139a11_720w.jpg?source=1940ef5c" alt=""></p><p>然后还有些公募和私募基金的技术岗，比如易方达基金，华安基金、汇添富基金，比较看中学历，待遇比券商更高。</p><p>我认识的一个中部211硕去了上海***资产（私募），22k*18=39.6，在基金公司里算是比较低的了。</p><h3 id="二、各大银行" tabindex="-1"><a class="header-anchor" href="#二、各大银行" aria-hidden="true">#</a> 二、各大银行</h3><blockquote><p><strong>总结一下就是3点：稳定+薪资还行+没有营销压力。</strong></p><p><strong>整体上大银行的待遇＞中小银行</strong></p><p><strong>地方性银行总行的待遇＞国有行省级分行</strong></p></blockquote><p>银行是个比较大的话题：3家政策行（稳定+高薪），6大国有行，12家全国股份行。</p><p>每个省的地方性城市银行，地方性农商行，未改制的省联社，还有一批地级市小银行。</p><p>在这个回答介绍得很详细了：</p><p><a href="https://www.zhihu.com/question/380468704/answer/2095035862" target="_blank" rel="noopener noreferrer"><span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><h3 id="三、烟草-国家电网-中石油-铁路集团" tabindex="-1"><a class="header-anchor" href="#三、烟草-国家电网-中石油-铁路集团" aria-hidden="true">#</a> 三、烟草+国家电网+中石油+铁路集团</h3><p>烟草公司：分为各省<strong>烟草专卖局</strong>和各省<strong>中烟工业</strong>（卷烟厂），属于闷声发大财的代表，懂的都懂。</p><p><img src="https://picx.zhimg.com/50/v2-fecba03d2d1ae5e073fcbceffd56a8e1_720w.jpg?source=1940ef5c" alt=""></p><p>电网是个很大的话题，首选是输电卖电的<strong>国家电网、南方电网</strong>。</p><p>还有<strong>发电</strong>的央企（煤电、水电、风电、核电、光伏）：</p><blockquote><p>国家能源、大唐集团、中国华能、华电集团、国家电投、三峡集团、华润集团、国投集团、中广核集团、中核集团、</p></blockquote><p>最后是<strong>电力装备制造</strong>的新央企：中国电气装备集团（可能待遇不如前面的）</p><p>每个省都有<strong>中石油分公司</strong>。</p><p><strong>铁路招聘网：</strong></p><p><a href="https://link.zhihu.com/?target=https%3A//rczp.china-railway.com.cn/" target="_blank" rel="noopener noreferrer"><span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><p>提一句三大运营商，税前8-15万之间，工作氛围褒贬不一看部门和岗位，适合家境好无赚钱压力的。</p><p>同理还有各大<strong>航空公司</strong></p><p>各省<strong>高速路集团</strong>。</p><h3 id="四、军工相关的三家央企-航天科技-航天科工-电子科技集团" tabindex="-1"><a class="header-anchor" href="#四、军工相关的三家央企-航天科技-航天科工-电子科技集团" aria-hidden="true">#</a> 四、军工相关的三家央企：航天科技+航天科工+电子科技集团</h3><p>岗位多集中在北京、上海、西安、成都，其余很多省会也有子公司。</p><p>不同所差别很大，待遇看盈利情况，加班情况看部门，一般要求硕士。</p><h3 id="五、军队" tabindex="-1"><a class="header-anchor" href="#五、军队" aria-hidden="true">#</a> 五、军队</h3><p>军队文职和直招军官（偏题了）。</p><p><img src="https://pic2.zhimg.com/50/v2-51966090eedd0dcbae32023a02625a9e_720w.jpg?source=1940ef5c" alt=""></p><p>军官直招岗位查询地址：</p><p><a href="https://link.zhihu.com/?target=http%3A//111.203.147.109%3A9998/%23/position%3Fiden%3Dtourist" target="_blank" rel="noopener noreferrer"><span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><h3 id="六、医院信息科" tabindex="-1"><a class="header-anchor" href="#六、医院信息科" aria-hidden="true">#</a> 六、医院信息科</h3><p>医疗信息化，当甲方，不写代码，很爽的好吧。</p><p><img src="https://pica.zhimg.com/50/v2-79d92e0af447bb6a19b6ebf598bf1041_720w.jpg?source=1940ef5c" alt=""></p><p><a href="https://link.zhihu.com/?target=http%3A//www.cqwsrc.com/webSite/ZXGG/RDQP/html-1742/20078.html" target="_blank" rel="noopener noreferrer"><span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><h3 id="七、地方政府的平台公司" tabindex="-1"><a class="header-anchor" href="#七、地方政府的平台公司" aria-hidden="true">#</a> 七、地方政府的平台公司</h3><p>这个懂的都懂，比较小众，招聘要求比较高，待遇很好，也很稳定，不懂的就了解下城投公司。</p><p>大公司一般都有技术岗，登陆本省或本市的<strong>国资委</strong>官网查询。</p><p><strong>信息化是大潮流</strong>，各行各业都需要，大公司基本都有信息岗，但是职业前景比较窄。</p><p>只收藏不点赞是几个意思？本文持续更新，欢迎补充。</p><p><strong>总结：没找到满意工作，读研吧，选择会多很多：</strong></p><p><a href="https://www.zhihu.com/question/41164706/answer/407790651" target="_blank" rel="noopener noreferrer"><span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a 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class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java抽象类</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" 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18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><meta property="articleSection" content="Java核心"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 5 分钟</span><meta property="timeRequired" content="PT5M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="java抽象类" tabindex="-1"><a class="header-anchor" href="#java抽象类" aria-hidden="true">#</a> Java抽象类</h1><p>“二哥，你这明显加快了更新的频率呀！”三妹对于我最近的肝劲由衷的佩服了起来。</p><p>“哈哈，是呀，这次不能再断更了，我要再更 175 篇，总计 200 篇，给广大的学弟学妹们一个完整的 Java 学习体系。”我对未来充满了信心。</p><p>“那就开始吧。”三妹说。</p><hr><p>定义抽象类的时候需要用到关键字 <code>abstract</code>，放在 <code>class</code> 关键字前，就像下面这样。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">abstract</span> <span class="token keyword">class</span> <span class="token class-name">AbstractPlayer</span> <span class="token punctuation">{</span>
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class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java抽象类</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 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277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2021年10月22日</span><meta property="datePublished" content="2021-10-22T07:22:10.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 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7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 5 分钟</span><meta property="timeRequired" content="PT5M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="java抽象类" tabindex="-1"><a class="header-anchor" href="#java抽象类" aria-hidden="true">#</a> Java抽象类</h1><p>“二哥，你这明显加快了更新的频率呀！”三妹对于我最近的肝劲由衷的佩服了起来。</p><p>“哈哈，是呀，这次不能再断更了，我要再更 175 篇，总计 200 篇，给广大的学弟学妹们一个完整的 Java 学习体系。”我对未来充满了信心。</p><p>“那就开始吧。”三妹说。</p><hr><p>定义抽象类的时候需要用到关键字 <code>abstract</code>，放在 <code>class</code> 关键字前，就像下面这样。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">abstract</span> <span class="token keyword">class</span> <span class="token class-name">AbstractPlayer</span> <span class="token punctuation">{</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><p>关于抽象类的命名，《阿里的 Java 开发手册》上有强调，“抽象类命名要使用 Abstract 或 Base 开头”，这条规约还是值得遵守的。</p><p>抽象类是不能实例化的，尝试通过 <code>new</code> 关键字实例化的话，编译器会报错，提示“类是抽象的，不能实例化”。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/object-class/abstract-01.png" alt=""></p><p>虽然抽象类不能实例化，但可以有子类。子类通过 <code>extends</code> 关键字来继承抽象类。就像下面这样。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">BasketballPlayer</span> <span class="token keyword">extends</span> <span class="token class-name">AbstractPlayer</span> <span class="token punctuation">{</span>
 <span class="token punctuation">}</span>
@@ -134,6 +134,6 @@ footballPlayer<span class="token punctuation">.</span><span class="token functio
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>在项目的 resource 目录下建一个文本文件，名字叫 helloworld.txt，里面的内容就是“Hello World”。文件的具体位置如下图所示，我用的集成开发环境是 Intellij IDEA。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/object-class/abstract-05.png" alt=""></p><p>在 resource 目录下的文件可以通过 <code>ClassLoader.getResource()</code> 的方式获取到 URI 路径，然后就可以取到文本内容了。</p><p>输出结果如下所示：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>[hello world]
 [HELLO WORLD]
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><hr><p>“完了吗？二哥”三妹似乎还沉浸在聆听教诲的快乐中。</p><p>“是滴，这次我们系统化的学习了抽象类，可以说面面俱到了。三妹你可以把代码敲一遍，加强了一些印象，电脑交给你了。”说完，我就跑到阳台去抽烟了。</p><p>“呼。。。。。”一个大大的眼圈飘散开来，又是愉快的一天~</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/oo/abstract.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/14 上午7:14:28</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/oo/code-init.html" class="nav-link prev" aria-label="代码初始化块"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->代码初始化块</div></a><a href="/oo/interface.html" class="nav-link next" aria-label="接口"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">接口<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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 </html>
diff --git a/dist/oo/code-init.html b/dist/oo/code-init.html
index 709293a7..24c2ae57 100644
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sidebar-page" aria-label="注解"><!---->注解<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-extra-meal/enum.html" class="nav-link sidebar-link sidebar-page" aria-label="枚举"><!---->枚举<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-extra-meal/fanshe.html" class="nav-link sidebar-link sidebar-page" aria-label="反射"><!---->反射<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.4 字符串&amp;数组</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.5 集合框架（容器）</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.6 IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.11 并发编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java代码初始化块</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 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clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.11 并发编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java代码初始化块</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2021年10月22日</span><meta property="datePublished" content="2021-10-22T07:22:10.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><meta property="articleSection" content="Java核心"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 3 分钟</span><meta property="timeRequired" content="PT3M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="java代码初始化块" tabindex="-1"><a class="header-anchor" href="#java代码初始化块" aria-hidden="true">#</a> Java代码初始化块</h1><p>“哥，今天我们要学习的内容是‘代码初始化块’，对吧？”看来三妹已经提前预习了我上次留给她的作业。</p><p>“是的，三妹。代码初始化块用于初始化一些成员变量。 ”我面带着朴实无华的微笑回答着她，“对象在创建的时候会执行代码初始化块。”</p><p>“可以直接通过‘=’操作符对成员变量进行初始化，但通过代码初始化块可以做更多的事情，比如说打印出成员变量初始化后的值。”</p><p>“三妹，来看下面的代码，我们可以直接通过 <code>=</code> 操作符对成员变量进行初始化。”</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">class</span> <span class="token class-name">Bike</span><span class="token punctuation">{</span>  
     <span class="token keyword">int</span> speed<span class="token operator">=</span><span class="token number">100</span><span class="token punctuation">;</span>  
 <span class="token punctuation">}</span>  
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>“哥，那为什么还需要代码初始化块呢？”三妹眨了眨眼睛，不解地问。</p><p>“我们可以通过代码初始化块执行一个更复杂的操作，比如为集合填充值。来看下面这段代码。”</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">Bike</span> <span class="token punctuation">{</span>
@@ -95,6 +95,6 @@
 代码初始化块
 子类构造方法
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>“在默认情况下，子类的构造方法在执行的时候会主动去调用父类的构造方法。也就是说，其实是构造方法先执行的，再执行的代码初始化块。”</p><p>“这个例子再次印证了之前的第二条规则：代码初始化块是放在构造方法中执行的，只不过比较靠前。”</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/oo/code-init.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/14 上午7:14:28</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/nice-article/bokeyuan-jianxijavazhongdifangwenquanxiankongzhi.html" class="nav-link prev" aria-label="访问权限控制"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->访问权限控制</div></a><a href="/oo/abstract.html" class="nav-link next" aria-label="抽象类"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">抽象类<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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class="title">2.6 IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.11 并发编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java构造方法</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" 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class="router-link-active router-link-exact-active toc-link level3">04、如何重载构造方法</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/oo/construct.html#_05、构造方法和方法有什么区别" class="router-link-active router-link-exact-active toc-link level3">05、构造方法和方法有什么区别</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/oo/construct.html#_06、如何复制对象" class="router-link-active router-link-exact-active toc-link level3">06、如何复制对象</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/oo/construct.html#_07、ending" class="router-link-active router-link-exact-active toc-link level3">07、ending</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="java构造方法" tabindex="-1"><a class="header-anchor" href="#java构造方法" aria-hidden="true">#</a> Java构造方法</h1><p>我对三妹说，“<a href="https://mp.weixin.qq.com/s/L4jAgQPurGZPvWu8ECtBpA" target="_blank" rel="noopener noreferrer">上一节<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>学了 Java 中的方法，接着学构造方法的话，难度就小很多了。”</p><p>“在 Java 中，构造方法是一种特殊的方法，当一个类被实例化的时候，就会调用构造方法。只有在构造方法被调用的时候，对象才会被分配内存空间。每次使用 <code>new</code> 关键字创建对象的时候，构造方法至少会被调用一次。”</p><p>“如果你在一个类中没有看见构造方法，并不是因为构造方法不存在，而是被缺省了，编译器会给这个类提供一个默认的构造方法。往大的方面说，就是，Java 有两种类型的构造方法：<strong>无参构造方法和有参构造方法</strong>。”</p><p>“注意，之所以叫它构造方法，是因为对象在创建的时候，需要通过构造方法初始化值——就是描写对象的那些状态，对应的是类中的字段。”</p><h3 id="_01、创建构造方法的规则有哪些" tabindex="-1"><a class="header-anchor" href="#_01、创建构造方法的规则有哪些" aria-hidden="true">#</a> 01、创建构造方法的规则有哪些</h3><p>构造方法必须符合以下规则：</p><ul><li>构造方法的名字必须和类名一样；</li><li>构造方法没有返回类型，包括 void；</li><li>构造方法不能是抽象的、静态的、最终的、同步的，也就是说，构造方法不能通过 abstract、static、final、synchronized 关键字修饰。</li></ul><p>简单解析一下最后一条规则。</p><ul><li>由于构造方法不能被子类继承，所以用 final 和 abstract 修饰没有意义；</li><li>构造方法用于初始化一个对象，所以用 static 修饰没有意义；</li><li>多个线程不会同时创建内存地址相同的同一个对象，所以用 synchronized 修饰没有必要。</li></ul><p>构造方法的语法格式如下：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">class</span> class_name <span class="token punctuation">{</span>
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href="/oo/inner-class.html" class="nav-link sidebar-link sidebar-page" aria-label="内部类"><!---->内部类<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/oo/static.html" class="nav-link sidebar-link sidebar-page" aria-label="static"><!---->static<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/oo/this-super.html" class="nav-link sidebar-link sidebar-page" aria-label="this 和 super"><!---->this 和 super<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/oo/final.html" class="nav-link sidebar-link sidebar-page" aria-label="final"><!---->final<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/oo/instanceof.html" class="nav-link sidebar-link sidebar-page" aria-label="instanceof"><!---->instanceof<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-extra-meal/immutable.html" class="nav-link sidebar-link sidebar-page" 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class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.4 字符串&amp;数组</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.5 集合框架（容器）</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.6 IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.11 并发编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java构造方法</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 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router-link-exact-active toc-link level3">01、创建构造方法的规则有哪些</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/oo/construct.html#_02、-什么是默认构造方法" class="router-link-active router-link-exact-active toc-link level3">02、 什么是默认构造方法</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/oo/construct.html#_03、什么是有参构造方法" class="router-link-active router-link-exact-active toc-link level3">03、什么是有参构造方法</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/oo/construct.html#_04、如何重载构造方法" class="router-link-active router-link-exact-active toc-link level3">04、如何重载构造方法</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/oo/construct.html#_05、构造方法和方法有什么区别" class="router-link-active router-link-exact-active toc-link level3">05、构造方法和方法有什么区别</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/oo/construct.html#_06、如何复制对象" class="router-link-active router-link-exact-active toc-link level3">06、如何复制对象</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/oo/construct.html#_07、ending" class="router-link-active router-link-exact-active toc-link level3">07、ending</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="java构造方法" tabindex="-1"><a class="header-anchor" href="#java构造方法" aria-hidden="true">#</a> Java构造方法</h1><p>我对三妹说，“<a href="https://mp.weixin.qq.com/s/L4jAgQPurGZPvWu8ECtBpA" target="_blank" rel="noopener noreferrer">上一节<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>学了 Java 中的方法，接着学构造方法的话，难度就小很多了。”</p><p>“在 Java 中，构造方法是一种特殊的方法，当一个类被实例化的时候，就会调用构造方法。只有在构造方法被调用的时候，对象才会被分配内存空间。每次使用 <code>new</code> 关键字创建对象的时候，构造方法至少会被调用一次。”</p><p>“如果你在一个类中没有看见构造方法，并不是因为构造方法不存在，而是被缺省了，编译器会给这个类提供一个默认的构造方法。往大的方面说，就是，Java 有两种类型的构造方法：<strong>无参构造方法和有参构造方法</strong>。”</p><p>“注意，之所以叫它构造方法，是因为对象在创建的时候，需要通过构造方法初始化值——就是描写对象的那些状态，对应的是类中的字段。”</p><h3 id="_01、创建构造方法的规则有哪些" tabindex="-1"><a class="header-anchor" href="#_01、创建构造方法的规则有哪些" aria-hidden="true">#</a> 01、创建构造方法的规则有哪些</h3><p>构造方法必须符合以下规则：</p><ul><li>构造方法的名字必须和类名一样；</li><li>构造方法没有返回类型，包括 void；</li><li>构造方法不能是抽象的、静态的、最终的、同步的，也就是说，构造方法不能通过 abstract、static、final、synchronized 关键字修饰。</li></ul><p>简单解析一下最后一条规则。</p><ul><li>由于构造方法不能被子类继承，所以用 final 和 abstract 修饰没有意义；</li><li>构造方法用于初始化一个对象，所以用 static 修饰没有意义；</li><li>多个线程不会同时创建内存地址相同的同一个对象，所以用 synchronized 修饰没有必要。</li></ul><p>构造方法的语法格式如下：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">class</span> class_name <span class="token punctuation">{</span>
     <span class="token keyword">public</span> <span class="token function">class_name</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">{</span><span class="token punctuation">}</span>    <span class="token comment">// 默认无参构造方法</span>
     <span class="token keyword">public</span> <span class="token function">ciass_name</span><span class="token punctuation">(</span><span class="token punctuation">[</span>paramList<span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">{</span><span class="token punctuation">}</span>    <span class="token comment">// 定义有参数列表的构造方法</span>
     …
@@ -236,6 +236,6 @@
     <span class="token punctuation">}</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>通过 <code>clone()</code> 方法复制对象的时候，ClonePerson 必须先实现 Cloneable 接口的 <code>clone()</code> 方法，然后再调用 <code>clone()</code> 方法（<code>ClonePerson p2 = (ClonePerson) p1.clone()</code>）。</p><h3 id="_07、ending" tabindex="-1"><a class="header-anchor" href="#_07、ending" aria-hidden="true">#</a> 07、ending</h3><p>“二哥，我能问一些问题吗？”三妹精神焕发，没有丝毫的疲惫。</p><p>“当然可以啊，你问。”我很欣赏三妹孜孜不倦的态度。</p><p>“构造方法真的不返回任何值吗？”</p><p>“构造方法虽然没有返回值，但返回的是类的对象。”</p><p>“构造方法只能完成字段初始化的工作吗？”</p><p>“初始化字段只是构造方法的一种工作，它还可以做更多，比如启动线程，调用其他方法等。”</p><p>“好的，二哥，我的问题问完了，今天的学习可以结束了！”三妹一脸得意的样子。</p><p>“那你记得复习下一节的内容哦。”感受到三妹已经学到了知识，我也很欣慰。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/oo/construct.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/14 上午7:14:28</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/oo/method.html" class="nav-link prev" aria-label="方法"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->方法</div></a><a href="/nice-article/bokeyuan-jianxijavazhongdifangwenquanxiankongzhi.html" class="nav-link next" aria-label="访问权限控制"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">访问权限控制<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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+    <script type="module" src="/assets/app.615e41d8.js" defer></script>
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 </html>
diff --git a/dist/oo/final.html b/dist/oo/final.html
index 988e1d40..807553ed 100644
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+++ b/dist/oo/final.html
@@ -39,10 +39,10 @@
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class="header-anchor" href="#浅析java中的final关键字" aria-hidden="true">#</a> 浅析Java中的final关键字</h1><p>“哥，今天学什么呢？”</p><p>“今天学一个重要的关键字——final。 ”我面带着朴实无华的微笑回答着她，“对了，三妹，你打算考研吗？”</p><p>“还没想过，我今年才大一呢，到时候再说吧，你决定。”</p><p>“好吧。”我摊摊手，表示很无辜，真的是所有的决定都交给我这个哥哥了，如果决定错了，锅得背上。</p><h3 id="_01、final-变量" tabindex="-1"><a class="header-anchor" href="#_01、final-变量" aria-hidden="true">#</a> 01、final 变量</h3><p>“好了，我们先来看 final 修饰的变量吧！”</p><p>“被 final 修饰的变量无法重新赋值。换句话说，final 变量一旦初始化，就无法更改。”</p><p>“来看这行代码。”</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">final</span> <span class="token keyword">int</span> age <span class="token operator">=</span> <span class="token number">18</span><span class="token punctuation">;</span>
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href="/basic-extra-meal/varables.html" class="nav-link sidebar-link sidebar-page" aria-label="可变参数"><!---->可变参数<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-extra-meal/generic.html" class="nav-link sidebar-link sidebar-page" aria-label="泛型"><!---->泛型<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-extra-meal/annotation.html" class="nav-link sidebar-link sidebar-page" aria-label="注解"><!---->注解<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-extra-meal/enum.html" class="nav-link sidebar-link sidebar-page" aria-label="枚举"><!---->枚举<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-extra-meal/fanshe.html" class="nav-link sidebar-link sidebar-page" aria-label="反射"><!---->反射<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.4 字符串&amp;数组</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.5 集合框架（容器）</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.6 IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.11 并发编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->浅析Java中的final关键字</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2021年10月22日</span><meta property="datePublished" content="2021-10-22T07:22:10.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><meta property="articleSection" content="Java核心"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 5 分钟</span><meta property="timeRequired" content="PT5M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/oo/final.html#_01、final-变量" class="router-link-active router-link-exact-active toc-link level3">01、final 变量</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/oo/final.html#_02、final-方法" class="router-link-active router-link-exact-active toc-link level3">02、final 方法</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/oo/final.html#_03、final-类" class="router-link-active router-link-exact-active toc-link level3">03、final 类</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="浅析java中的final关键字" tabindex="-1"><a class="header-anchor" href="#浅析java中的final关键字" aria-hidden="true">#</a> 浅析Java中的final关键字</h1><p>“哥，今天学什么呢？”</p><p>“今天学一个重要的关键字——final。 ”我面带着朴实无华的微笑回答着她，“对了，三妹，你打算考研吗？”</p><p>“还没想过，我今年才大一呢，到时候再说吧，你决定。”</p><p>“好吧。”我摊摊手，表示很无辜，真的是所有的决定都交给我这个哥哥了，如果决定错了，锅得背上。</p><h3 id="_01、final-变量" tabindex="-1"><a class="header-anchor" href="#_01、final-变量" aria-hidden="true">#</a> 01、final 变量</h3><p>“好了，我们先来看 final 修饰的变量吧！”</p><p>“被 final 修饰的变量无法重新赋值。换句话说，final 变量一旦初始化，就无法更改。”</p><p>“来看这行代码。”</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">final</span> <span class="token keyword">int</span> age <span class="token operator">=</span> <span class="token number">18</span><span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>“当尝试将 age 的值修改为 30 的时候，编译器就生气了。”</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/keywords/23-01.png" alt=""></p><p>“再来看这段代码。”</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">Pig</span> <span class="token punctuation">{</span>
    <span class="token keyword">private</span> <span class="token class-name">String</span> name<span class="token punctuation">;</span>
 
@@ -95,6 +95,6 @@ pig<span class="token punctuation">.</span><span class="token function">setName<
 writer<span class="token punctuation">.</span><span class="token function">setName</span><span class="token punctuation">(</span><span class="token string">&quot;沉默王二&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span>writer<span class="token punctuation">.</span><span class="token function">getName</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// 沉默王二</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>“Writer 的 name 字段的默认值是 null，但可以通过 settter 方法将其更改为沉默王二。也就是说，如果一个类只是 final 的，那么它并不是不可变的全部条件。”</p><p>“关于不可变类，我之前也单独讲过一篇，你一会去看看。”</p><p><a href="https://mp.weixin.qq.com/s/wbdV9rV60AwWiiTEBYPP7g" target="_blank" rel="noopener noreferrer">不可变类<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><p>“把一个类设计成 final 的，有其安全方面的考虑，但不应该故意为之，因为把一个类定义成 final 的，意味着它没办法继承，假如这个类的一些方法存在一些问题的话，我们就无法通过重写的方式去修复它。”</p><hr><p>“三妹，final 关键字我们就学到这里吧，你一会再学习一下 Java 字符串为什么是不可变的和不可变类。”我揉一揉犯困的双眼，疲惫地给三妹说，“学完这两个知识点，你会对 final 的认知更清晰一些。”</p><p>“好的，二哥，我这就去学习去。你去休息会。”</p><p>我起身站到阳台上，看着窗外的车水马龙，不一会儿，就发起来呆。</p><p>“好想去再看一场周杰伦的演唱会，不知道 2021 有没有这个机会。”</p><p>我心里这样想着，天渐渐地暗了下来。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/oo/final.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/12 下午4:24:21</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/oo/this-super.html" class="nav-link prev" aria-label="this 和 super"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->this 和 super</div></a><a href="/oo/instanceof.html" class="nav-link next" aria-label="instanceof"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">instanceof<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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aria-label="不可变对象"><!---->不可变对象<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-extra-meal/varables.html" class="nav-link sidebar-link sidebar-page" aria-label="可变参数"><!---->可变参数<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-extra-meal/generic.html" class="nav-link sidebar-link sidebar-page" aria-label="泛型"><!---->泛型<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-extra-meal/annotation.html" class="nav-link sidebar-link sidebar-page" aria-label="注解"><!---->注解<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-extra-meal/enum.html" class="nav-link sidebar-link sidebar-page" aria-label="枚举"><!---->枚举<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-extra-meal/fanshe.html" class="nav-link sidebar-link sidebar-page" aria-label="反射"><!---->反射<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.4 字符串&amp;数组</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.5 集合框架（容器）</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.6 IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.11 并发编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java 内部类</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 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134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年4月29日</span><meta property="datePublished" content="2022-04-29T03:55:17.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><meta property="articleSection" content="Java核心"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 4 分钟</span><meta property="timeRequired" content="PT4M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/oo/inner-class.html#内部类简介" class="router-link-active router-link-exact-active toc-link level3">内部类简介</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/oo/inner-class.html#总结" class="router-link-active router-link-exact-active toc-link level3">总结</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="java-内部类" tabindex="-1"><a class="header-anchor" href="#java-内部类" aria-hidden="true">#</a> Java 内部类</h1><h3 id="内部类简介" tabindex="-1"><a class="header-anchor" href="#内部类简介" aria-hidden="true">#</a> 内部类简介</h3><p>在 Java 中，可以将一个类定义在另外一个类里面或者一个方法里面，这样的类叫做内部类。</p><p>一般来说，内部类分为成员内部类、局部内部类、匿名内部类和静态内部类。</p><p><strong>1）成员内部类</strong></p><p>成员内部类是最常见的内部类，看下面的代码：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">class</span> <span class="token class-name">Wanger</span> <span class="token punctuation">{</span>
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clickable"><!----><span class="title">2.1 Java概述</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.2 Java基础语法</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">2.3 面向对象编程</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/oo/object-class.html" class="nav-link sidebar-link sidebar-page" aria-label="对象和类"><!---->对象和类<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/oo/var.html" class="nav-link sidebar-link sidebar-page" aria-label="变量"><!---->变量<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/oo/method.html" class="nav-link sidebar-link sidebar-page" aria-label="方法"><!---->方法<!----></a><ul 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super"><!---->this 和 super<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/oo/final.html" class="nav-link sidebar-link sidebar-page" aria-label="final"><!---->final<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/oo/instanceof.html" class="nav-link sidebar-link sidebar-page" aria-label="instanceof"><!---->instanceof<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-extra-meal/immutable.html" class="nav-link sidebar-link sidebar-page" aria-label="不可变对象"><!---->不可变对象<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-extra-meal/varables.html" class="nav-link sidebar-link sidebar-page" aria-label="可变参数"><!---->可变参数<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-extra-meal/generic.html" class="nav-link sidebar-link sidebar-page" aria-label="泛型"><!---->泛型<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-extra-meal/annotation.html" class="nav-link sidebar-link sidebar-page" aria-label="注解"><!---->注解<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-extra-meal/enum.html" class="nav-link sidebar-link sidebar-page" aria-label="枚举"><!---->枚举<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-extra-meal/fanshe.html" class="nav-link sidebar-link sidebar-page" aria-label="反射"><!---->反射<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.4 字符串&amp;数组</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.5 集合框架（容器）</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.6 IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.11 并发编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java 内部类</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" 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isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><meta property="articleSection" content="Java核心"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 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213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 4 分钟</span><meta property="timeRequired" content="PT4M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/oo/inner-class.html#内部类简介" class="router-link-active router-link-exact-active toc-link level3">内部类简介</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/oo/inner-class.html#总结" class="router-link-active router-link-exact-active toc-link level3">总结</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="java-内部类" tabindex="-1"><a class="header-anchor" href="#java-内部类" aria-hidden="true">#</a> Java 内部类</h1><h3 id="内部类简介" tabindex="-1"><a class="header-anchor" href="#内部类简介" aria-hidden="true">#</a> 内部类简介</h3><p>在 Java 中，可以将一个类定义在另外一个类里面或者一个方法里面，这样的类叫做内部类。</p><p>一般来说，内部类分为成员内部类、局部内部类、匿名内部类和静态内部类。</p><p><strong>1）成员内部类</strong></p><p>成员内部类是最常见的内部类，看下面的代码：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">class</span> <span class="token class-name">Wanger</span> <span class="token punctuation">{</span>
     <span class="token keyword">int</span> age <span class="token operator">=</span> <span class="token number">18</span><span class="token punctuation">;</span>
     
     <span class="token keyword">class</span> <span class="token class-name">Wangxiaoer</span> <span class="token punctuation">{</span>
@@ -135,6 +135,6 @@
     <span class="token punctuation">}</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>由于 static 关键字的存在，静态内部类是不允许访问外部类中非 static 的变量和方法的，这一点也非常好理解：你一个静态的内部类访问我非静态的成员变量干嘛？</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/oo/inner-class-69523196-37fe-43c6-a52e-5a8c94fdd2d8.png" alt=""></p><h3 id="总结" tabindex="-1"><a class="header-anchor" href="#总结" aria-hidden="true">#</a> 总结</h3><p>为什么要使用内部类？</p><p>在《Think in java》中有这样一句话：</p><blockquote><p>使用内部类最吸引人的原因是：每个内部类都能独立地继承一个（接口的）实现，所以无论外围类是否已经继承了某个（接口的）实现，对于内部类都没有影响。</p></blockquote><p>在我们程序设计中有时候会存在一些使用接口很难解决的问题，这个时候我们可以利用内部类提供的、可以继承多个具体的或者抽象的类的能力来解决这些程序设计问题。可以这样说，接口只是解决了部分问题，而内部类使得多重继承的解决方案变得更加完整。</p><p>使用内部类还能够为我们带来如下特性（摘自《Think in java》）：</p><ul><li>1、内部类可以使用多个实例，每个实例都有自己的状态信息，并且与其他外围对象的信息相互独立。</li><li>2、在单个外部类中，可以让多个内部类以不同的方式实现同一个接口，或者继承同一个类。</li><li>3、创建内部类对象的时刻并不依赖于外部类对象的创建。</li><li>4、内部类并没有令人迷惑的“is-a”关系，他就是一个独立的实体。</li><li>5、内部类提供了更好的封装，除了该外围类，其他类都不能访问。</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/oo/inner-class.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/18 上午7:32:53</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: 46487578+parade0393@users.noreply.github.com">parade岁月</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/oo/interface.html" class="nav-link prev" aria-label="接口"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->接口</div></a><a href="/oo/static.html" class="nav-link next" aria-label="static"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">static<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java instanceof关键字用法</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 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href="/basic-extra-meal/immutable.html" class="nav-link sidebar-link sidebar-page" aria-label="不可变对象"><!---->不可变对象<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-extra-meal/varables.html" class="nav-link sidebar-link sidebar-page" aria-label="可变参数"><!---->可变参数<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-extra-meal/generic.html" class="nav-link sidebar-link sidebar-page" aria-label="泛型"><!---->泛型<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-extra-meal/annotation.html" class="nav-link sidebar-link sidebar-page" aria-label="注解"><!---->注解<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-extra-meal/enum.html" class="nav-link sidebar-link sidebar-page" aria-label="枚举"><!---->枚举<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-extra-meal/fanshe.html" class="nav-link sidebar-link sidebar-page" aria-label="反射"><!---->反射<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.4 字符串&amp;数组</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.5 集合框架（容器）</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.6 IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.11 并发编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java instanceof关键字用法</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 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class="theme-hope-content"><h1 id="java-instanceof关键字用法" tabindex="-1"><a class="header-anchor" href="#java-instanceof关键字用法" aria-hidden="true">#</a> Java instanceof关键字用法</h1><p>instanceof 关键字的用法其实很简单：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token punctuation">(</span>object<span class="token punctuation">)</span> <span class="token keyword">instanceof</span> <span class="token punctuation">(</span>type<span class="token punctuation">)</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>用意也非常简单，判断对象是否符合指定的类型，结果要么是 true，要么是 false。在反序列化的时候，instanceof 操作符还是蛮常用的，因为这时候我们不太确定对象属不属于指定的类型，如果不进行判断的话，就容易抛出 ClassCastException 异常。</p><p>我们来建这样一个简单的类 Round：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">class</span> <span class="token class-name">Round</span> <span class="token punctuation">{</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><p>然后新增一个扩展类 Ring：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">class</span> <span class="token class-name">Ring</span> <span class="token keyword">extends</span> <span class="token class-name">Round</span> <span class="token punctuation">{</span>
@@ -74,6 +74,6 @@
     <span class="token comment">// 如果类型匹配 直接使用 s</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>可以直接在 if 条件判断类型的时候添加一个变量，就不需要再强转和声明新的变量了。</p><p>“哇，这样就简洁了呀！”三妹不仅惊叹到！</p><p>好了，关于 instanceof 操作符我们就先讲到这吧，难是一点都不难，希望各位同学也能够很好的掌握。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/oo/instanceof.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/14 上午7:14:28</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/oo/final.html" class="nav-link prev" aria-label="final"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->final</div></a><a href="/basic-extra-meal/immutable.html" class="nav-link next" aria-label="不可变对象"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">不可变对象<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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diff --git a/dist/oo/interface.html b/dist/oo/interface.html
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64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 9 分钟</span><meta property="timeRequired" content="PT9M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="java接口" tabindex="-1"><a class="header-anchor" href="#java接口" aria-hidden="true">#</a> Java接口</h1><p>“哥，我看你朋友圈说《Java 程序员进阶之路》专栏收到了第一笔赞赏呀，虽然只有一块钱，但我也替你感到开心。”三妹的脸上洋溢着自信的微笑，仿佛这钱是打给她的一样。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/object-class/interface-01.png" alt=""></p><p>“是啊，早上起来的时候看到这条信息，还真的是挺开心的，虽然只有一块钱，但是开源的第一笔，也是我人生当中的第一笔，真的非常感谢这个读者，值得纪念的一天。”我自己也掩饰不住内心的激动。</p><p>“有了这份鼓励，我相信你更新下去的动力更足了！”三妹今天说的话真的是特别令人喜欢。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/object-class/interface-02.png" alt=""></p><p>“是啊是啊，所以，今天要更新第 26 讲了——接口。”我接着说，“对于面向对象编程来说，抽象是一个极具魅力的特征。如果一个程序员的抽象思维很差，那他在编程中就会遇到很多困难，无法把业务变成具体的代码。在 Java 中，可以通过两种形式来达到抽象的目的，一种上一篇的主角——<a href="https://mp.weixin.qq.com/s/WSmGwdtlimIFVVDVKfvrWQ" target="_blank" rel="noopener noreferrer">抽象类<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，另外一种就是今天的主角——接口。”</p><hr><p>“接口是什么呀？”三妹顺着我的话题及时的插话到。</p><p>接口通过 interface 关键字来定义，它可以包含一些常量和方法，来看下面这个示例。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">interface</span> <span class="token class-name">Electronic</span> <span class="token punctuation">{</span>
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aria-label="反射"><!---->反射<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.4 字符串&amp;数组</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.5 集合框架（容器）</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.6 IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.11 并发编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java接口</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2021年10月22日</span><meta property="datePublished" content="2021-10-22T07:22:10.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><meta property="articleSection" content="Java核心"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 9 分钟</span><meta property="timeRequired" content="PT9M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="java接口" tabindex="-1"><a class="header-anchor" href="#java接口" aria-hidden="true">#</a> Java接口</h1><p>“哥，我看你朋友圈说《Java 程序员进阶之路》专栏收到了第一笔赞赏呀，虽然只有一块钱，但我也替你感到开心。”三妹的脸上洋溢着自信的微笑，仿佛这钱是打给她的一样。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/object-class/interface-01.png" alt=""></p><p>“是啊，早上起来的时候看到这条信息，还真的是挺开心的，虽然只有一块钱，但是开源的第一笔，也是我人生当中的第一笔，真的非常感谢这个读者，值得纪念的一天。”我自己也掩饰不住内心的激动。</p><p>“有了这份鼓励，我相信你更新下去的动力更足了！”三妹今天说的话真的是特别令人喜欢。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/object-class/interface-02.png" alt=""></p><p>“是啊是啊，所以，今天要更新第 26 讲了——接口。”我接着说，“对于面向对象编程来说，抽象是一个极具魅力的特征。如果一个程序员的抽象思维很差，那他在编程中就会遇到很多困难，无法把业务变成具体的代码。在 Java 中，可以通过两种形式来达到抽象的目的，一种上一篇的主角——<a href="https://mp.weixin.qq.com/s/WSmGwdtlimIFVVDVKfvrWQ" target="_blank" rel="noopener noreferrer">抽象类<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，另外一种就是今天的主角——接口。”</p><hr><p>“接口是什么呀？”三妹顺着我的话题及时的插话到。</p><p>接口通过 interface 关键字来定义，它可以包含一些常量和方法，来看下面这个示例。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">interface</span> <span class="token class-name">Electronic</span> <span class="token punctuation">{</span>
     <span class="token comment">// 常量</span>
     <span class="token class-name">String</span> LED <span class="token operator">=</span> <span class="token string">&quot;LED&quot;</span><span class="token punctuation">;</span>
 
@@ -162,6 +162,6 @@ shapes<span class="token punctuation">.</span><span class="token function">add</
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>这就实现了多态，变量 circleShape、squareShape 的引用类型都是 Shape，但执行 <code>shape.name()</code> 方法的时候，Java 虚拟机知道该去调用 Circle 的 <code>name()</code> 方法还是 Square 的 <code>name()</code> 方法。</p><p>说一下多态存在的 3 个前提：</p><p>1、要有继承关系，比如说 Circle 和 Square 都实现了 Shape 接口。 2、子类要重写父类的方法，Circle 和 Square 都重写了 <code>name()</code> 方法。 3、父类引用指向子类对象，circleShape 和 squareShape 的类型都为 Shape，但前者指向的是 Circle 对象，后者指向的是 Square 对象。</p><p>然后，我们来看一下测试结果：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>圆
 正方形
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><p>也就意味着，尽管在 for 循环中，shape 的类型都为 Shape，但在调用 <code>name()</code> 方法的时候，它知道 Circle 对象应该调用 Circle 类的 <code>name()</code> 方法，Square 对象应该调用 Square 类的 <code>name()</code> 方法。</p><p>“哦，我理解了哥。那我再问一下，抽象类和接口有什么差别呢？”</p><p>“哇，三妹呀，你这个问题恰到好处，问到了点子上。”我不由得为三妹竖起了大拇指。</p><p>1）语法层面上</p><ul><li>接口中不能有 private 和 protected 修饰的方法，抽象类中可以有。</li><li>接口中的变量只能是隐式的常量，抽象类中可以有任意类型的变量。</li><li>一个类只能继承一个抽象类，但却可以实现多个接口。</li></ul><p>2）设计层面上</p><p>抽象类是对类的一种抽象，继承抽象类的子类和抽象类本身是一种 <code>is-a</code> 的关系。</p><p>接口是对类的某种行为的一种抽象，接口和类之间并没有很强的关联关系，举个例子来说，所有的类都可以实现 <code>Serializable</code> 接口，从而具有序列化的功能，但不能说所有的类和 Serializable 之间是 <code>is-a</code> 的关系。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/oo/interface.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/14 上午7:14:28</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/oo/abstract.html" class="nav-link prev" aria-label="抽象类"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->抽象类</div></a><a href="/oo/inner-class.html" class="nav-link next" aria-label="内部类"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">内部类<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.11 并发编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java方法</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" 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123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 6 分钟</span><meta property="timeRequired" content="PT6M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/oo/method.html#_01、java-中的方法是什么" class="router-link-active router-link-exact-active toc-link level3">01、Java 中的方法是什么？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/oo/method.html#_02、如何声明方法" class="router-link-active router-link-exact-active toc-link level3">02、如何声明方法？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/oo/method.html#_02、方法有哪几种" class="router-link-active router-link-exact-active toc-link level3">02、方法有哪几种？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/oo/method.html#_03、什么是实例方法" class="router-link-active router-link-exact-active toc-link level3">03、什么是实例方法？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/oo/method.html#_04、什么是抽象方法" class="router-link-active router-link-exact-active toc-link level3">04、什么是抽象方法？</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="java方法" tabindex="-1"><a class="header-anchor" href="#java方法" aria-hidden="true">#</a> Java方法</h1><p>“二哥，<a href="https://mp.weixin.qq.com/s/UExby8GP3kSacCXliQw8pQ" target="_blank" rel="noopener noreferrer">上一节<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>学了对象和类，这一节我们学什么呢？”三妹满是期待的问我。</p><p>“这一节我们来了解一下 Java 中的方法——什么是方法？如何声明方法？方法有哪几种？什么是实例方法？什么是抽象方法？”我笑着对三妹说，“我开始了啊，你不要闪啊。”</p><h3 id="_01、java-中的方法是什么" tabindex="-1"><a class="header-anchor" href="#_01、java-中的方法是什么" aria-hidden="true">#</a> 01、Java 中的方法是什么？</h3><p>方法用来实现代码的可重用性，我们编写一次方法，并多次使用它。通过增加或者删除方法中的一部分代码，就可以提高整体代码的可读性。</p><p>只有方法被调用时，它才会执行。Java 中最有名的方法当属 <code>main()</code> 方法，点击下面的链接可以阅读更多关于 <code>main()</code> 方法的知识点。</p><blockquote><p><a href="https://mp.weixin.qq.com/s/191I_2CVOxVuyfLVtb4jhg" target="_blank" rel="noopener noreferrer">零基础学 Java 第 4 讲：Hello World<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><h3 id="_02、如何声明方法" tabindex="-1"><a class="header-anchor" href="#_02、如何声明方法" aria-hidden="true">#</a> 02、如何声明方法？</h3><p>方法的声明反映了方法的一些信息，比如说可见性、返回类型、方法名和参数。如下图所示。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/object-class/17-01.png" alt=""></p><p><strong>访问权限</strong>：它指定了方法的可见性。Java 提供了四种访问权限修饰符：</p><ul><li>public：该方法可以被所有类访问。</li><li>private：该方法只能在定义它的类中访问。</li><li>protected：该方法可以被同一个包中的类，或者不同包中的子类访问。</li><li>default：该方法如果没有使用任何访问权限修饰符，Java 默认它使用 default 修饰符，该方法只能被同一个包中类可见。</li></ul><p><strong>返回类型</strong>：方法返回的数据类型，可以是基本数据类型、对象和集合，如果不需要返回数据，则使用 void 关键字。</p><p><strong>方法名</strong>：方法名最好反应出方法的功能，比如，我们要创建一个将两个数字相减的方法，那么方法名最好是 subtract。</p><p>方法名最好是一个动词，并且以小写字母开头。如果方法名包含两个以上单词，那么第一个单词最好是动词，然后是形容词或者名词，并且要以驼峰式的命名方式命名。比如：</p><ul><li>一个单词的方法名：<code>sum()</code></li><li>多个单词的方法名：<code>stringComparision()</code></li></ul><p>一个方法可能与同一个类中的另外一个方法同名，这被称为方法重载。</p><p><strong>参数</strong>：参数被放在一个圆括号内，如果有多个参数，可以使用逗号隔开。参数包含两个部分，参数类型和参数名。如果方法没有参数，圆括号是空的。</p><p><strong>方法签名</strong>：每一个方法都有一个签名，包括方法名和参数。</p><p><strong>方法体</strong>：方法体放在一对花括号内，把一些代码放在一起，用来执行特定的任务。</p><h3 id="_02、方法有哪几种" tabindex="-1"><a class="header-anchor" href="#_02、方法有哪几种" aria-hidden="true">#</a> 02、方法有哪几种？</h3><p>方法可以分为两种，一种叫预先定义方法，一种叫用户自定义方法。</p><p><strong>1）预先定义方法</strong></p><p>Java 提供了大量预先定义好的方法供我们调用，也称为标准类库方法，或者内置方法。比如说 String 类的 <code>length()</code>、<code>equals()</code>、<code>compare()</code> 方法，以及我们在初学 Java 阶段最常用的 <code>println()</code> 方法，用来在控制台打印信息。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token doc-comment comment">/**
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clickable"><!----><span class="title">2.1 Java概述</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.2 Java基础语法</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">2.3 面向对象编程</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/oo/object-class.html" class="nav-link sidebar-link sidebar-page" aria-label="对象和类"><!---->对象和类<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/oo/var.html" class="nav-link sidebar-link sidebar-page" aria-label="变量"><!---->变量<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/oo/method.html" class="router-link-active router-link-exact-active nav-link active 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class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-extra-meal/enum.html" class="nav-link sidebar-link sidebar-page" aria-label="枚举"><!---->枚举<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-extra-meal/fanshe.html" class="nav-link sidebar-link sidebar-page" aria-label="反射"><!---->反射<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.4 字符串&amp;数组</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.5 集合框架（容器）</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.6 IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.11 并发编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java方法</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 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router-link-exact-active toc-link level3">03、什么是实例方法？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/oo/method.html#_04、什么是抽象方法" class="router-link-active router-link-exact-active toc-link level3">04、什么是抽象方法？</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="java方法" tabindex="-1"><a class="header-anchor" href="#java方法" aria-hidden="true">#</a> Java方法</h1><p>“二哥，<a href="https://mp.weixin.qq.com/s/UExby8GP3kSacCXliQw8pQ" target="_blank" rel="noopener noreferrer">上一节<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>学了对象和类，这一节我们学什么呢？”三妹满是期待的问我。</p><p>“这一节我们来了解一下 Java 中的方法——什么是方法？如何声明方法？方法有哪几种？什么是实例方法？什么是抽象方法？”我笑着对三妹说，“我开始了啊，你不要闪啊。”</p><h3 id="_01、java-中的方法是什么" tabindex="-1"><a class="header-anchor" href="#_01、java-中的方法是什么" aria-hidden="true">#</a> 01、Java 中的方法是什么？</h3><p>方法用来实现代码的可重用性，我们编写一次方法，并多次使用它。通过增加或者删除方法中的一部分代码，就可以提高整体代码的可读性。</p><p>只有方法被调用时，它才会执行。Java 中最有名的方法当属 <code>main()</code> 方法，点击下面的链接可以阅读更多关于 <code>main()</code> 方法的知识点。</p><blockquote><p><a href="https://mp.weixin.qq.com/s/191I_2CVOxVuyfLVtb4jhg" target="_blank" rel="noopener noreferrer">零基础学 Java 第 4 讲：Hello World<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><h3 id="_02、如何声明方法" tabindex="-1"><a class="header-anchor" href="#_02、如何声明方法" aria-hidden="true">#</a> 02、如何声明方法？</h3><p>方法的声明反映了方法的一些信息，比如说可见性、返回类型、方法名和参数。如下图所示。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/object-class/17-01.png" alt=""></p><p><strong>访问权限</strong>：它指定了方法的可见性。Java 提供了四种访问权限修饰符：</p><ul><li>public：该方法可以被所有类访问。</li><li>private：该方法只能在定义它的类中访问。</li><li>protected：该方法可以被同一个包中的类，或者不同包中的子类访问。</li><li>default：该方法如果没有使用任何访问权限修饰符，Java 默认它使用 default 修饰符，该方法只能被同一个包中类可见。</li></ul><p><strong>返回类型</strong>：方法返回的数据类型，可以是基本数据类型、对象和集合，如果不需要返回数据，则使用 void 关键字。</p><p><strong>方法名</strong>：方法名最好反应出方法的功能，比如，我们要创建一个将两个数字相减的方法，那么方法名最好是 subtract。</p><p>方法名最好是一个动词，并且以小写字母开头。如果方法名包含两个以上单词，那么第一个单词最好是动词，然后是形容词或者名词，并且要以驼峰式的命名方式命名。比如：</p><ul><li>一个单词的方法名：<code>sum()</code></li><li>多个单词的方法名：<code>stringComparision()</code></li></ul><p>一个方法可能与同一个类中的另外一个方法同名，这被称为方法重载。</p><p><strong>参数</strong>：参数被放在一个圆括号内，如果有多个参数，可以使用逗号隔开。参数包含两个部分，参数类型和参数名。如果方法没有参数，圆括号是空的。</p><p><strong>方法签名</strong>：每一个方法都有一个签名，包括方法名和参数。</p><p><strong>方法体</strong>：方法体放在一对花括号内，把一些代码放在一起，用来执行特定的任务。</p><h3 id="_02、方法有哪几种" tabindex="-1"><a class="header-anchor" href="#_02、方法有哪几种" aria-hidden="true">#</a> 02、方法有哪几种？</h3><p>方法可以分为两种，一种叫预先定义方法，一种叫用户自定义方法。</p><p><strong>1）预先定义方法</strong></p><p>Java 提供了大量预先定义好的方法供我们调用，也称为标准类库方法，或者内置方法。比如说 String 类的 <code>length()</code>、<code>equals()</code>、<code>compare()</code> 方法，以及我们在初学 Java 阶段最常用的 <code>println()</code> 方法，用来在控制台打印信息。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token doc-comment comment">/**
  * <span class="token keyword">@author</span> 微信搜「沉默王二」，回复关键字 PDF
  */</span>
 <span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">PredefinedMethodDemo</span> <span class="token punctuation">{</span>
@@ -141,6 +141,6 @@
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>输出结果如下所示：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>重写了抽象方法
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/oo/method.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/14 上午7:14:28</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/oo/var.html" class="nav-link prev" aria-label="变量"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->变量</div></a><a href="/oo/construct.html" class="nav-link next" aria-label="构造方法"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">构造方法<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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href="/oo/static.html" class="nav-link sidebar-link sidebar-page" aria-label="static"><!---->static<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/oo/this-super.html" class="nav-link sidebar-link sidebar-page" aria-label="this 和 super"><!---->this 和 super<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/oo/final.html" class="nav-link sidebar-link sidebar-page" aria-label="final"><!---->final<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/oo/instanceof.html" class="nav-link sidebar-link sidebar-page" aria-label="instanceof"><!---->instanceof<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-extra-meal/immutable.html" class="nav-link sidebar-link sidebar-page" aria-label="不可变对象"><!---->不可变对象<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-extra-meal/varables.html" class="nav-link sidebar-link sidebar-page" aria-label="可变参数"><!---->可变参数<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-extra-meal/generic.html" class="nav-link sidebar-link sidebar-page" aria-label="泛型"><!---->泛型<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-extra-meal/annotation.html" class="nav-link sidebar-link sidebar-page" aria-label="注解"><!---->注解<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-extra-meal/enum.html" class="nav-link sidebar-link sidebar-page" aria-label="枚举"><!---->枚举<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-extra-meal/fanshe.html" class="nav-link sidebar-link sidebar-page" aria-label="反射"><!---->反射<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.4 字符串&amp;数组</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.5 集合框架（容器）</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.6 IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.11 并发编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->怎么理解Java中类和对象的概念？</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 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123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 10 分钟</span><meta property="timeRequired" content="PT10M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/oo/object-class.html#_01、面向过程和面向对象" class="router-link-active router-link-exact-active toc-link level3">01、面向过程和面向对象</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/oo/object-class.html#_02、类" class="router-link-active router-link-exact-active toc-link level3">02、类</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/oo/object-class.html#_03、new-一个对象" class="router-link-active router-link-exact-active toc-link level3">03、new 一个对象</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/oo/object-class.html#_04、初始化对象" class="router-link-active router-link-exact-active toc-link level3">04、初始化对象</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/oo/object-class.html#_05、关于对象" class="router-link-active router-link-exact-active toc-link level3">05、关于对象</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="怎么理解java中类和对象的概念" tabindex="-1"><a class="header-anchor" href="#怎么理解java中类和对象的概念" aria-hidden="true">#</a> 怎么理解Java中类和对象的概念？</h1><p>“二哥，我那天在图书馆复习<a href="https://mp.weixin.qq.com/s/WzMEOEdzI0fFwBQ4s0S-0g" target="_blank" rel="noopener noreferrer">上一节<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>你讲的内容，刚好碰见一个学长，他问我有没有‘对象’，我说还没有啊。结果你猜他说什么，‘要不要我给你 new 一个啊？’我当时就懵了，new 是啥意思啊，二哥？”三妹满是疑惑的问我。</p><p>“哈哈，三妹，你学长还挺幽默啊。new 是 Java 中的一个关键字，用来把类变成对象。”我笑着对三妹说，“对象和类是 Java 中最基本的两个概念，可以说撑起了面向对象编程（OOP）的一片天。”</p><h3 id="_01、面向过程和面向对象" tabindex="-1"><a class="header-anchor" href="#_01、面向过程和面向对象" aria-hidden="true">#</a> 01、面向过程和面向对象</h3><p>三妹是不是要问，什么是 OOP？</p><p>OOP 的英文全称是 Object Oriented Programming，要理解它的话，就要先理解面向对象，要想理解面向对象的话，就要先理解面向过程，因为一开始没有面向对象的编程语言，都是面向过程。</p><p>举个简单点的例子来区分一下面向过程和面向对象。</p><p>有一天，你想吃小碗汤了，怎么办呢？有两个选择：</p><p>1）自己买食材，豆腐皮啊、肉啊、蒜苔啊等等，自己动手做。</p><p>2）到饭店去，只需要对老板喊一声，“来份小碗汤。”</p><p>第一种就是面向过程，第二种就是面向对象。</p><p>面向过程有什么劣势呢？假如你买了小碗汤的食材，临了又想吃宫保鸡丁了，你是不是还得重新买食材？</p><p>面向对象有什么优势呢？假如你不想吃小碗汤了，你只需要对老板说，“我那个小碗汤如果没做的话，换成宫保鸡丁吧！”</p><p>面向过程是流程化的，一步一步，上一步做完了，再做下一步。</p><p>面向对象是模块化的，我做我的，你做你的，我需要你做的话，我就告诉你一声。我不需要知道你到底怎么做，只看功劳不看苦劳。</p><p>不过，如果追到底的话，面向对象的底层其实还是面向过程，只不过把面向过程进行了抽象化，封装成了类，方便我们的调用。</p><h3 id="_02、类" tabindex="-1"><a class="header-anchor" href="#_02、类" aria-hidden="true">#</a> 02、类</h3><p>对象可以是现实中看得见的任何物体，比如说，一只特立独行的猪；也可以是想象中的任何虚拟物体，比如说能七十二变的孙悟空。</p><p>Java 通过类（class）来定义这些物体，这些物体有什么状态，通过字段来定义，比如说比如说猪的颜色是纯色还是花色；这些物体有什么行为，通过方法来定义，比如说猪会吃，会睡觉。</p><p>来，定义一个简单的类给你看看。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token doc-comment comment">/**
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right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.11 并发编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->怎么理解Java中类和对象的概念？</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon 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213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 10 分钟</span><meta property="timeRequired" content="PT10M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/oo/object-class.html#_01、面向过程和面向对象" class="router-link-active router-link-exact-active toc-link level3">01、面向过程和面向对象</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/oo/object-class.html#_02、类" class="router-link-active router-link-exact-active toc-link level3">02、类</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/oo/object-class.html#_03、new-一个对象" class="router-link-active router-link-exact-active toc-link level3">03、new 一个对象</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/oo/object-class.html#_04、初始化对象" class="router-link-active router-link-exact-active toc-link level3">04、初始化对象</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/oo/object-class.html#_05、关于对象" class="router-link-active router-link-exact-active toc-link level3">05、关于对象</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="怎么理解java中类和对象的概念" tabindex="-1"><a class="header-anchor" href="#怎么理解java中类和对象的概念" aria-hidden="true">#</a> 怎么理解Java中类和对象的概念？</h1><p>“二哥，我那天在图书馆复习<a href="https://mp.weixin.qq.com/s/WzMEOEdzI0fFwBQ4s0S-0g" target="_blank" rel="noopener noreferrer">上一节<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>你讲的内容，刚好碰见一个学长，他问我有没有‘对象’，我说还没有啊。结果你猜他说什么，‘要不要我给你 new 一个啊？’我当时就懵了，new 是啥意思啊，二哥？”三妹满是疑惑的问我。</p><p>“哈哈，三妹，你学长还挺幽默啊。new 是 Java 中的一个关键字，用来把类变成对象。”我笑着对三妹说，“对象和类是 Java 中最基本的两个概念，可以说撑起了面向对象编程（OOP）的一片天。”</p><h3 id="_01、面向过程和面向对象" tabindex="-1"><a class="header-anchor" href="#_01、面向过程和面向对象" aria-hidden="true">#</a> 01、面向过程和面向对象</h3><p>三妹是不是要问，什么是 OOP？</p><p>OOP 的英文全称是 Object Oriented Programming，要理解它的话，就要先理解面向对象，要想理解面向对象的话，就要先理解面向过程，因为一开始没有面向对象的编程语言，都是面向过程。</p><p>举个简单点的例子来区分一下面向过程和面向对象。</p><p>有一天，你想吃小碗汤了，怎么办呢？有两个选择：</p><p>1）自己买食材，豆腐皮啊、肉啊、蒜苔啊等等，自己动手做。</p><p>2）到饭店去，只需要对老板喊一声，“来份小碗汤。”</p><p>第一种就是面向过程，第二种就是面向对象。</p><p>面向过程有什么劣势呢？假如你买了小碗汤的食材，临了又想吃宫保鸡丁了，你是不是还得重新买食材？</p><p>面向对象有什么优势呢？假如你不想吃小碗汤了，你只需要对老板说，“我那个小碗汤如果没做的话，换成宫保鸡丁吧！”</p><p>面向过程是流程化的，一步一步，上一步做完了，再做下一步。</p><p>面向对象是模块化的，我做我的，你做你的，我需要你做的话，我就告诉你一声。我不需要知道你到底怎么做，只看功劳不看苦劳。</p><p>不过，如果追到底的话，面向对象的底层其实还是面向过程，只不过把面向过程进行了抽象化，封装成了类，方便我们的调用。</p><h3 id="_02、类" tabindex="-1"><a class="header-anchor" href="#_02、类" aria-hidden="true">#</a> 02、类</h3><p>对象可以是现实中看得见的任何物体，比如说，一只特立独行的猪；也可以是想象中的任何虚拟物体，比如说能七十二变的孙悟空。</p><p>Java 通过类（class）来定义这些物体，这些物体有什么状态，通过字段来定义，比如说比如说猪的颜色是纯色还是花色；这些物体有什么行为，通过方法来定义，比如说猪会吃，会睡觉。</p><p>来，定义一个简单的类给你看看。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token doc-comment comment">/**
  * 微信搜索「沉默王二」，回复 Java
  *
  * <span class="token keyword">@author</span> 沉默王二
@@ -221,6 +221,6 @@
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>运行结果：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>线
 圆形
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><p>在测试类中，shape1 的类型为 Shape，shape2 的类型也为 Shape，但调用 <code>draw()</code> 方法后，却能自动调用子类 Line 和 Circle 的 <code>draw()</code> 方法，这是为什么呢？</p><p>其实就是 Java 中的多态。</p><hr><p>更多 Java 对象和类的知识，请移步下一篇。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/oo/object-class.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/12 下午4:24:21</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><!----><a href="/oo/var.html" class="nav-link next" aria-label="变量"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">变量<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.6 IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.11 并发编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java中的static关键字解析</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon 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213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 10 分钟</span><meta property="timeRequired" content="PT10M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/oo/static.html#_01、静态变量" class="router-link-active router-link-exact-active toc-link level3">01、静态变量</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/oo/static.html#_02、静态方法" class="router-link-active router-link-exact-active toc-link level3">02、静态方法</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/oo/static.html#_03、静态代码块" class="router-link-active router-link-exact-active toc-link level3">03、静态代码块</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/oo/static.html#_04、静态内部类" class="router-link-active router-link-exact-active toc-link level3">04、静态内部类</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="java中的static关键字解析" tabindex="-1"><a class="header-anchor" href="#java中的static关键字解析" aria-hidden="true">#</a> Java中的static关键字解析</h1><p>“哥，你牙龈肿痛轻点没？周一的教妹学 Java 你都没有更新，偷懒了呀！”三妹关心地问我。</p><p>“今天周四了，吃了三天的药，疼痛已经减轻不少，咱妈还给我打了电话，让我买点牛黄解毒片下下火。”我面带着微笑对三妹说，“学习可不能落下，今天我们来学 Java 中 <code>static</code> 关键字吧。”</p><p>“static 是 Java 中比较难以理解的一个关键字，也是各大公司的面试官最喜欢问到的一个知识点之一。”我喝了一口咖啡继续说道。</p><p>“既然是面试重点，那我可得好好学习下。”三妹连忙说。</p><p>“static 关键字的作用可以用一句话来描述：‘<strong>方便在没有创建对象的情况下进行调用</strong>，包括变量和方法’。也就是说，只要类被加载了，就可以通过类名进行访问。”我扶了扶沉重眼镜，继续说到，“static 可以用来修饰类的成员变量，以及成员方法。我们一个个来看。”</p><h3 id="_01、静态变量" tabindex="-1"><a class="header-anchor" href="#_01、静态变量" aria-hidden="true">#</a> 01、静态变量</h3><p>“如果在声明变量的时候使用了 static 关键字，那么这个变量就被称为静态变量。静态变量只在类加载的时候获取一次内存空间，这使得静态变量很节省内存空间。”家里的暖气有点足，我跑去开了一点窗户后继续说道。</p><p>“来考虑这样一个 Student 类。”话音刚落，我就在键盘上噼里啪啦一阵敲。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">Student</span> <span class="token punctuation">{</span>
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right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.11 并发编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java中的static关键字解析</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 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class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/oo/static.html#_01、静态变量" class="router-link-active router-link-exact-active toc-link level3">01、静态变量</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/oo/static.html#_02、静态方法" class="router-link-active router-link-exact-active toc-link level3">02、静态方法</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/oo/static.html#_03、静态代码块" class="router-link-active router-link-exact-active toc-link level3">03、静态代码块</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/oo/static.html#_04、静态内部类" class="router-link-active router-link-exact-active toc-link level3">04、静态内部类</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="java中的static关键字解析" tabindex="-1"><a class="header-anchor" href="#java中的static关键字解析" aria-hidden="true">#</a> Java中的static关键字解析</h1><p>“哥，你牙龈肿痛轻点没？周一的教妹学 Java 你都没有更新，偷懒了呀！”三妹关心地问我。</p><p>“今天周四了，吃了三天的药，疼痛已经减轻不少，咱妈还给我打了电话，让我买点牛黄解毒片下下火。”我面带着微笑对三妹说，“学习可不能落下，今天我们来学 Java 中 <code>static</code> 关键字吧。”</p><p>“static 是 Java 中比较难以理解的一个关键字，也是各大公司的面试官最喜欢问到的一个知识点之一。”我喝了一口咖啡继续说道。</p><p>“既然是面试重点，那我可得好好学习下。”三妹连忙说。</p><p>“static 关键字的作用可以用一句话来描述：‘<strong>方便在没有创建对象的情况下进行调用</strong>，包括变量和方法’。也就是说，只要类被加载了，就可以通过类名进行访问。”我扶了扶沉重眼镜，继续说到，“static 可以用来修饰类的成员变量，以及成员方法。我们一个个来看。”</p><h3 id="_01、静态变量" tabindex="-1"><a class="header-anchor" href="#_01、静态变量" aria-hidden="true">#</a> 01、静态变量</h3><p>“如果在声明变量的时候使用了 static 关键字，那么这个变量就被称为静态变量。静态变量只在类加载的时候获取一次内存空间，这使得静态变量很节省内存空间。”家里的暖气有点足，我跑去开了一点窗户后继续说道。</p><p>“来考虑这样一个 Student 类。”话音刚落，我就在键盘上噼里啪啦一阵敲。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">Student</span> <span class="token punctuation">{</span>
     <span class="token class-name">String</span> name<span class="token punctuation">;</span>
     <span class="token keyword">int</span> age<span class="token punctuation">;</span>
     <span class="token class-name">String</span> school <span class="token operator">=</span> <span class="token string">&quot;郑州大学&quot;</span><span class="token punctuation">;</span>
@@ -172,6 +172,6 @@ main 方法
     <span class="token punctuation">}</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>“三妹，打起精神，马上就结束了。”</p><p>“哦哦，这段代码看起来很别致啊，哥。”</p><p>“是的，三妹，这段代码在以后创建单例的时候还会见到。”</p><p>“第一次加载 Singleton 类时并不会初始化 instance，只有第一次调用 <code>getInstance()</code> 方法时 Java 虚拟机才开始加载 SingletonHolder 并初始化 instance，这样不仅能确保线程安全，也能保证 Singleton 类的唯一性。不过，创建单例更优雅的一种方式是使用枚举，以后再讲给你听。”</p><p>“需要注意的是。第一，静态内部类不能访问外部类的所有成员变量；第二，静态内部类可以访问外部类的所有静态变量，包括私有静态变量。第三，外部类不能声明为 static。”</p><p>“三妹，你看，在 Singleton 类上加 static 后，编译器就提示错误了。”</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/keywords/19-08.png" alt=""></p><p>三妹点了点头，所有所思。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/oo/static.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/14 上午7:14:28</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/oo/inner-class.html" class="nav-link prev" aria-label="内部类"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->内部类</div></a><a href="/oo/this-super.html" class="nav-link next" aria-label="this 和 super"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">this 和 super<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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aria-label="注解"><!---->注解<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-extra-meal/enum.html" class="nav-link sidebar-link sidebar-page" aria-label="枚举"><!---->枚举<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-extra-meal/fanshe.html" class="nav-link sidebar-link sidebar-page" aria-label="反射"><!---->反射<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.4 字符串&amp;数组</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.5 集合框架（容器）</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.6 IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.11 并发编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java中this和super的用法总结</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 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15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 10 分钟</span><meta property="timeRequired" content="PT10M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/oo/this-super.html#_01、-指向当前对象" class="router-link-active router-link-exact-active toc-link level3">01、 指向当前对象</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/oo/this-super.html#_03、调用当前类的方法" class="router-link-active router-link-exact-active toc-link level3">03、调用当前类的方法</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/oo/this-super.html#_04、调用当前类的构造方法" class="router-link-active router-link-exact-active toc-link level3">04、调用当前类的构造方法</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/oo/this-super.html#_05、作为参数在方法中传递" class="router-link-active router-link-exact-active toc-link level3">05、作为参数在方法中传递</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/oo/this-super.html#_06、作为参数在构造方法中传递" class="router-link-active router-link-exact-active toc-link level3">06、作为参数在构造方法中传递</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/oo/this-super.html#_07、作为方法的返回值" class="router-link-active router-link-exact-active toc-link level3">07、作为方法的返回值</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/oo/this-super.html#_08、super-关键字" class="router-link-active router-link-exact-active toc-link level3">08、super 关键字</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="java中this和super的用法总结" tabindex="-1"><a class="header-anchor" href="#java中this和super的用法总结" aria-hidden="true">#</a> Java中this和super的用法总结</h1><p>“哥，被喊大舅子的感觉怎么样啊？”三妹不怀好意地对我说，她眼睛里充满着不屑。</p><p>“说实话，这种感觉还不错。”我有点难为情的回答她，“不过，有一点令我感到些许失落。大家的焦点似乎都是你的颜值，完全忽略了我的盛世美颜啊！”</p><p>“哥，你想啥呢，那是因为你文章写得好，不然谁认识我是谁啊！有你这样的哥哥，我还是挺自豪的。”三妹郑重其事地说，“话说今天咱学啥呢？”</p><p>“三妹啊，你这句话说得我喜欢。今天来学习一下 Java 中的 this 关键字吧。”喝了一口农夫山泉后，我对三妹说。</p><p>“this 关键字有很多种用法，其中最常用的一个是，它可以作为引用变量，指向当前对象。”我面带着朴实无华的微笑继续说，“除此之外， this 关键字还可以完成以下工作。”</p><ul><li>调用当前类的方法；</li><li><code>this()</code> 可以调用当前类的构造方法；</li><li>this 可以作为参数在方法中传递；</li><li>this 可以作为参数在构造方法中传递；</li><li>this 可以作为方法的返回值，返回当前类的对象。</li></ul><h3 id="_01、-指向当前对象" tabindex="-1"><a class="header-anchor" href="#_01、-指向当前对象" aria-hidden="true">#</a> 01、 指向当前对象</h3><p>“三妹，来看下面这段代码。”话音刚落，我就在键盘上噼里啪啦一阵敲。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">WithoutThisStudent</span> <span class="token punctuation">{</span>
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clickable"><!----><span class="title">2.1 Java概述</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.2 Java基础语法</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">2.3 面向对象编程</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/oo/object-class.html" class="nav-link sidebar-link sidebar-page" aria-label="对象和类"><!---->对象和类<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/oo/var.html" class="nav-link sidebar-link sidebar-page" aria-label="变量"><!---->变量<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/oo/method.html" class="nav-link sidebar-link sidebar-page" aria-label="方法"><!---->方法<!----></a><ul 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href="/oo/inner-class.html" class="nav-link sidebar-link sidebar-page" aria-label="内部类"><!---->内部类<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/oo/static.html" class="nav-link sidebar-link sidebar-page" aria-label="static"><!---->static<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/oo/this-super.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="this 和 super"><!---->this 和 super<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/oo/this-super.html#_01、-指向当前对象" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="01、 指向当前对象"><!---->01、 指向当前对象<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/oo/this-super.html#_03、调用当前类的方法" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="03、调用当前类的方法"><!---->03、调用当前类的方法<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/oo/this-super.html#_04、调用当前类的构造方法" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="04、调用当前类的构造方法"><!---->04、调用当前类的构造方法<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/oo/this-super.html#_05、作为参数在方法中传递" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="05、作为参数在方法中传递"><!---->05、作为参数在方法中传递<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/oo/this-super.html#_06、作为参数在构造方法中传递" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="06、作为参数在构造方法中传递"><!---->06、作为参数在构造方法中传递<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/oo/this-super.html#_07、作为方法的返回值" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="07、作为方法的返回值"><!---->07、作为方法的返回值<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/oo/this-super.html#_08、super-关键字" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="08、super 关键字"><!---->08、super 关键字<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/oo/final.html" class="nav-link sidebar-link sidebar-page" aria-label="final"><!---->final<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/oo/instanceof.html" class="nav-link sidebar-link sidebar-page" aria-label="instanceof"><!---->instanceof<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-extra-meal/immutable.html" class="nav-link sidebar-link sidebar-page" aria-label="不可变对象"><!---->不可变对象<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-extra-meal/varables.html" class="nav-link sidebar-link sidebar-page" aria-label="可变参数"><!---->可变参数<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-extra-meal/generic.html" class="nav-link sidebar-link sidebar-page" aria-label="泛型"><!---->泛型<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-extra-meal/annotation.html" class="nav-link sidebar-link sidebar-page" aria-label="注解"><!---->注解<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-extra-meal/enum.html" class="nav-link sidebar-link sidebar-page" aria-label="枚举"><!---->枚举<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-extra-meal/fanshe.html" class="nav-link sidebar-link sidebar-page" aria-label="反射"><!---->反射<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.4 字符串&amp;数组</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.5 集合框架（容器）</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.6 IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.11 并发编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java中this和super的用法总结</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2021年10月22日</span><meta property="datePublished" content="2021-10-22T07:22:10.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><meta property="articleSection" content="Java核心"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 10 分钟</span><meta property="timeRequired" content="PT10M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/oo/this-super.html#_01、-指向当前对象" class="router-link-active router-link-exact-active toc-link level3">01、 指向当前对象</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/oo/this-super.html#_03、调用当前类的方法" class="router-link-active router-link-exact-active toc-link level3">03、调用当前类的方法</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/oo/this-super.html#_04、调用当前类的构造方法" class="router-link-active router-link-exact-active toc-link level3">04、调用当前类的构造方法</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/oo/this-super.html#_05、作为参数在方法中传递" class="router-link-active router-link-exact-active toc-link level3">05、作为参数在方法中传递</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/oo/this-super.html#_06、作为参数在构造方法中传递" class="router-link-active router-link-exact-active toc-link level3">06、作为参数在构造方法中传递</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/oo/this-super.html#_07、作为方法的返回值" class="router-link-active router-link-exact-active toc-link level3">07、作为方法的返回值</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/oo/this-super.html#_08、super-关键字" class="router-link-active router-link-exact-active toc-link level3">08、super 关键字</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="java中this和super的用法总结" tabindex="-1"><a class="header-anchor" href="#java中this和super的用法总结" aria-hidden="true">#</a> Java中this和super的用法总结</h1><p>“哥，被喊大舅子的感觉怎么样啊？”三妹不怀好意地对我说，她眼睛里充满着不屑。</p><p>“说实话，这种感觉还不错。”我有点难为情的回答她，“不过，有一点令我感到些许失落。大家的焦点似乎都是你的颜值，完全忽略了我的盛世美颜啊！”</p><p>“哥，你想啥呢，那是因为你文章写得好，不然谁认识我是谁啊！有你这样的哥哥，我还是挺自豪的。”三妹郑重其事地说，“话说今天咱学啥呢？”</p><p>“三妹啊，你这句话说得我喜欢。今天来学习一下 Java 中的 this 关键字吧。”喝了一口农夫山泉后，我对三妹说。</p><p>“this 关键字有很多种用法，其中最常用的一个是，它可以作为引用变量，指向当前对象。”我面带着朴实无华的微笑继续说，“除此之外， this 关键字还可以完成以下工作。”</p><ul><li>调用当前类的方法；</li><li><code>this()</code> 可以调用当前类的构造方法；</li><li>this 可以作为参数在方法中传递；</li><li>this 可以作为参数在构造方法中传递；</li><li>this 可以作为方法的返回值，返回当前类的对象。</li></ul><h3 id="_01、-指向当前对象" tabindex="-1"><a class="header-anchor" href="#_01、-指向当前对象" aria-hidden="true">#</a> 01、 指向当前对象</h3><p>“三妹，来看下面这段代码。”话音刚落，我就在键盘上噼里啪啦一阵敲。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">WithoutThisStudent</span> <span class="token punctuation">{</span>
     <span class="token class-name">String</span> name<span class="token punctuation">;</span>
     <span class="token keyword">int</span> age<span class="token punctuation">;</span>
 
@@ -316,6 +316,6 @@ com.itwanger.twentyseven.ThisAsParam@77459877
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>“Emp 类继承了 Person 类，也就继承了 id 和 name 字段，当在 Emp 中新增了 salary 字段后，构造方法中就可以使用 <code>super(id, name)</code> 来调用父类的有参构造方法。”</p><p>“来看一下输出结果。”</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>1 沉默王二 20000.0
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>三妹点了点头，所有所思。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/oo/this-super.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/14 上午7:14:28</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/oo/static.html" class="nav-link prev" aria-label="static"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->static</div></a><a href="/oo/final.html" class="nav-link next" aria-label="final"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">final<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java变量的作用域：局部变量、成员变量、静态变量、常量</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon 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router-link-exact-active toc-link level3">03、静态变量</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/oo/var.html#_04、常量" class="router-link-active router-link-exact-active toc-link level3">04、常量</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="java变量的作用域-局部变量、成员变量、静态变量、常量" tabindex="-1"><a class="header-anchor" href="#java变量的作用域-局部变量、成员变量、静态变量、常量" aria-hidden="true">#</a> Java变量的作用域：局部变量、成员变量、静态变量、常量</h1><p>“二哥，听说 Java 变量在以后的日子里经常用，能不能提前给我透露透露？”三妹咪了一口麦香可可奶茶后对我说。</p><p>“三妹啊，搬个凳子坐我旁边，听二哥来给你慢慢说啊。”</p><p>Java 变量就好像一个容器，可以保存程序在运行过程中的值，它在声明的时候会定义对应的数据类型（Java 分为两种数据类型：基本数据类型和引用数据类型）。变量按照作用域的范围又可分为三种类型：局部变量，成员变量和静态变量。</p><p>比如说，<code>int data = 88;</code>，其中 data 就是一个变量，它的值为 88，类型为整型（int）。</p><h3 id="_01、局部变量" tabindex="-1"><a class="header-anchor" href="#_01、局部变量" aria-hidden="true">#</a> 01、局部变量</h3><p>在方法体内声明的变量被称为局部变量，该变量只能在该方法内使用，类中的其他方法并不知道该变量。来看下面这个示例：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token doc-comment comment">/**
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clickable"><!----><span class="title">2.1 Java概述</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.2 Java基础语法</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">2.3 面向对象编程</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/oo/object-class.html" class="nav-link sidebar-link sidebar-page" aria-label="对象和类"><!---->对象和类<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/oo/var.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="变量"><!---->变量<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/oo/var.html#_01、局部变量" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="01、局部变量"><!---->01、局部变量<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/oo/var.html#_02、成员变量" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="02、成员变量"><!---->02、成员变量<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/oo/var.html#_03、静态变量" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="03、静态变量"><!---->03、静态变量<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/oo/var.html#_04、常量" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="04、常量"><!---->04、常量<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/oo/method.html" class="nav-link sidebar-link sidebar-page" aria-label="方法"><!---->方法<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/oo/construct.html" class="nav-link sidebar-link sidebar-page" aria-label="构造方法"><!---->构造方法<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/nice-article/bokeyuan-jianxijavazhongdifangwenquanxiankongzhi.html" class="nav-link sidebar-link sidebar-page" aria-label="访问权限控制"><!---->访问权限控制<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/oo/code-init.html" class="nav-link sidebar-link sidebar-page" aria-label="代码初始化块"><!---->代码初始化块<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/oo/abstract.html" class="nav-link sidebar-link sidebar-page" aria-label="抽象类"><!---->抽象类<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/oo/interface.html" class="nav-link sidebar-link sidebar-page" aria-label="接口"><!---->接口<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/oo/inner-class.html" class="nav-link sidebar-link sidebar-page" aria-label="内部类"><!---->内部类<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/oo/static.html" class="nav-link sidebar-link sidebar-page" aria-label="static"><!---->static<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/oo/this-super.html" class="nav-link sidebar-link sidebar-page" aria-label="this 和 super"><!---->this 和 super<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/oo/final.html" class="nav-link sidebar-link sidebar-page" aria-label="final"><!---->final<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/oo/instanceof.html" class="nav-link sidebar-link sidebar-page" aria-label="instanceof"><!---->instanceof<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-extra-meal/immutable.html" class="nav-link sidebar-link sidebar-page" aria-label="不可变对象"><!---->不可变对象<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-extra-meal/varables.html" class="nav-link sidebar-link sidebar-page" aria-label="可变参数"><!---->可变参数<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-extra-meal/generic.html" class="nav-link sidebar-link sidebar-page" aria-label="泛型"><!---->泛型<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-extra-meal/annotation.html" class="nav-link sidebar-link sidebar-page" aria-label="注解"><!---->注解<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-extra-meal/enum.html" class="nav-link sidebar-link sidebar-page" aria-label="枚举"><!---->枚举<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/basic-extra-meal/fanshe.html" class="nav-link sidebar-link sidebar-page" aria-label="反射"><!---->反射<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.4 字符串&amp;数组</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.5 集合框架（容器）</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.6 IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.11 并发编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java变量的作用域：局部变量、成员变量、静态变量、常量</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2021年10月22日</span><meta property="datePublished" content="2021-10-22T07:22:10.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 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class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/oo/var.html#_01、局部变量" class="router-link-active router-link-exact-active toc-link level3">01、局部变量</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/oo/var.html#_02、成员变量" class="router-link-active router-link-exact-active toc-link level3">02、成员变量</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/oo/var.html#_03、静态变量" class="router-link-active router-link-exact-active toc-link level3">03、静态变量</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/oo/var.html#_04、常量" class="router-link-active router-link-exact-active toc-link level3">04、常量</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="java变量的作用域-局部变量、成员变量、静态变量、常量" tabindex="-1"><a class="header-anchor" href="#java变量的作用域-局部变量、成员变量、静态变量、常量" aria-hidden="true">#</a> Java变量的作用域：局部变量、成员变量、静态变量、常量</h1><p>“二哥，听说 Java 变量在以后的日子里经常用，能不能提前给我透露透露？”三妹咪了一口麦香可可奶茶后对我说。</p><p>“三妹啊，搬个凳子坐我旁边，听二哥来给你慢慢说啊。”</p><p>Java 变量就好像一个容器，可以保存程序在运行过程中的值，它在声明的时候会定义对应的数据类型（Java 分为两种数据类型：基本数据类型和引用数据类型）。变量按照作用域的范围又可分为三种类型：局部变量，成员变量和静态变量。</p><p>比如说，<code>int data = 88;</code>，其中 data 就是一个变量，它的值为 88，类型为整型（int）。</p><h3 id="_01、局部变量" tabindex="-1"><a class="header-anchor" href="#_01、局部变量" aria-hidden="true">#</a> 01、局部变量</h3><p>在方法体内声明的变量被称为局部变量，该变量只能在该方法内使用，类中的其他方法并不知道该变量。来看下面这个示例：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token doc-comment comment">/**
  * <span class="token keyword">@author</span> 微信搜「沉默王二」，回复关键字 PDF
  */</span>
 <span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">LocalVariable</span> <span class="token punctuation">{</span>
@@ -86,6 +86,6 @@
     <span class="token punctuation">}</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>“好了，三妹，关于 Java 变量就先说这么多吧，你是不是已经清楚了？”转动了一下僵硬的脖子后，我对三妹说。</p><p>“是啊，二哥，我想以后还会再见到它们吧？”</p><p>“那见的次数可就多了，就好像你每天眨眼的次数一样多。”</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/oo/var.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/14 上午7:14:28</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/oo/object-class.html" class="nav-link prev" aria-label="对象和类"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->对象和类</div></a><a href="/oo/method.html" class="nav-link next" aria-label="方法"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">方法<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->第一个Java程序：Hello World</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2019年1月1日</span><meta property="datePublished" content="2019-01-01T00:00:00.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><meta property="articleSection" content="Java核心"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 7 分钟</span><meta property="timeRequired" content="PT7M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/overview/hello-world.html#一、安装集成开发环境intellij-idea" class="router-link-active router-link-exact-active toc-link level2">一、安装集成开发环境Intellij IDEA</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/overview/hello-world.html#_01、下载-idea" class="router-link-active router-link-exact-active toc-link level3">01、下载 IDEA</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/overview/hello-world.html#_02、安装-idea" class="router-link-active router-link-exact-active toc-link level3">02、安装 IDEA</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/overview/hello-world.html#_03、启动-idea" class="router-link-active router-link-exact-active toc-link level3">03、启动 IDEA</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/overview/hello-world.html#二、hello-world" class="router-link-active router-link-exact-active toc-link level2">二、Hello World</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/overview/hello-world.html#三、jdk和jre有什么区别" class="router-link-active router-link-exact-active toc-link level2">三、JDK和JRE有什么区别？</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/overview/hello-world.html#_01、jdk" class="router-link-active router-link-exact-active toc-link level3">01、JDK</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/overview/hello-world.html#_02、jre" class="router-link-active router-link-exact-active toc-link level3">02、JRE</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="第一个java程序-hello-world" tabindex="-1"><a class="header-anchor" href="#第一个java程序-hello-world" aria-hidden="true">#</a> 第一个Java程序：Hello World</h1><h2 id="一、安装集成开发环境intellij-idea" tabindex="-1"><a class="header-anchor" href="#一、安装集成开发环境intellij-idea" aria-hidden="true">#</a> 一、安装集成开发环境Intellij IDEA</h2><p>IntelliJ IDEA 简称 IDEA，是业界公认为最好的 Java 集成开发工具，尤其是在代码自动提示、代码重构、代码版本管理、单元测试、代码分析等方面有着亮眼的发挥。</p><p>IDEA 产于捷克，开发人员以严谨著称的东欧程序员为主，分为社区版和付费版两个版本。我们在学习阶段，社区版就足够用了。</p><p>回想起我最初学 Java 的时候，老师要求我们在记事本上敲代码，在命令行中编译和执行 Java 代码，搞得全班三分之二的同学都做好了放弃学习 Java 的打算。</p><p>鉴于此，我强烈推荐大家使用集成开发工具，比如说 IntelliJ IDEA 来学习。</p><p>IDEA 分为社区版和付费版两个版本。</p><h3 id="_01、下载-idea" tabindex="-1"><a class="header-anchor" href="#_01、下载-idea" aria-hidden="true">#</a> 01、下载 IDEA</h3><p>IntelliJ IDEA 的官方下载地址为：<a href="https://www.jetbrains.com/idea/download" target="_blank" rel="noopener noreferrer">https://www.jetbrains.com/idea/download/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><p><img src="https://cdn.jsdelivr.net/gh/itwanger/itwanger.github.io/assets/images/2019/11/java-idea-community-1.png" alt=""></p><p>UItimate 为付费版，可以免费试用，主要针对的是 Web 和企业开发用户；Community 为免费版，可以免费使用，主要针对的是 Java 初学者和安卓开发用户。</p><p>功能上的差别如下图所示。</p><p><img src="https://cdn.jsdelivr.net/gh/itwanger/itwanger.github.io/assets/images/2019/11/java-idea-community-2.png" alt=""></p><p>本篇教程主要针对的是 Java 初学者，所以选择免费版为例，点击「Download」进行下载。</p><p>稍等一分钟时间，大概 580M。</p><h3 id="_02、安装-idea" tabindex="-1"><a class="header-anchor" href="#_02、安装-idea" aria-hidden="true">#</a> 02、安装 IDEA</h3><p>双击运行 IDEA 安装程序，一步步傻瓜式的下一步就行了。</p><p><img src="https://cdn.jsdelivr.net/gh/itwanger/itwanger.github.io/assets/images/2019/11/java-idea-community-3.png" alt=""></p><p><img src="https://cdn.jsdelivr.net/gh/itwanger/itwanger.github.io/assets/images/2019/11/java-idea-community-4.png" alt=""></p><p><img src="https://cdn.jsdelivr.net/gh/itwanger/itwanger.github.io/assets/images/2019/11/java-idea-community-5.png" alt=""></p><p>为了方便启动 IDEA，可以勾选【64-bit launcher】复选框。为了关联 Java 源文件，可以勾选【.java】复选框。</p><p><img src="https://cdn.jsdelivr.net/gh/itwanger/itwanger.github.io/assets/images/2019/11/java-idea-community-6.png" alt=""></p><p>点击【Install】后，需要静静地等待一会，大概一分钟的时间，趁机休息一下眼睛。</p><p><img src="https://cdn.jsdelivr.net/gh/itwanger/itwanger.github.io/assets/images/2019/11/java-idea-community-7.png" alt=""></p><p>安装完成后的界面如下图所示。</p><p><img src="https://cdn.jsdelivr.net/gh/itwanger/itwanger.github.io/assets/images/2019/11/java-idea-community-8.png" alt=""></p><h3 id="_03、启动-idea" tabindex="-1"><a class="header-anchor" href="#_03、启动-idea" aria-hidden="true">#</a> 03、启动 IDEA</h3><p>回到桌面，双击运行 IDEA 的快捷方式，启动 IDEA。</p><p><img src="https://cdn.jsdelivr.net/gh/itwanger/itwanger.github.io/assets/images/2019/11/java-idea-community-9.png" alt=""></p><p>假装阅读完条款后，勾选同意复选框，点击【Continue】</p><p><img src="https://cdn.jsdelivr.net/gh/itwanger/itwanger.github.io/assets/images/2019/11/java-idea-community-10.png" alt=""></p><p>如果想要帮助 IDEA 收集改进信息，可以点击【Send Usage Statistics】；否则点击【Don&#39;t send】。</p><p><img src="https://cdn.jsdelivr.net/gh/itwanger/itwanger.github.io/assets/images/2019/11/java-idea-community-11.png" alt=""></p><p>到此，Intellij IDEA 的安装就完成了，很简单。</p><h2 id="二、hello-world" tabindex="-1"><a class="header-anchor" href="#二、hello-world" aria-hidden="true">#</a> 二、Hello World</h2><p>第一个 Java 程序非常简单，代码如下：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token doc-comment comment">/**
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clickable active"><!----><span class="title">2.1 Java概述</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/overview/what-is-java.html" class="nav-link sidebar-link sidebar-page" aria-label="什么是Java？"><!---->什么是Java？<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/overview/hello-world.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="编写第一个 Java 程序"><!---->编写第一个 Java 程序<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/overview/hello-world.html#一、安装集成开发环境intellij-idea" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="一、安装集成开发环境Intellij IDEA"><!---->一、安装集成开发环境Intellij IDEA<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/overview/hello-world.html#_01、下载-idea" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="01、下载 IDEA"><!---->01、下载 IDEA<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/overview/hello-world.html#_02、安装-idea" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="02、安装 IDEA"><!---->02、安装 IDEA<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/overview/hello-world.html#_03、启动-idea" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="03、启动 IDEA"><!---->03、启动 IDEA<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/overview/hello-world.html#二、hello-world" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="二、Hello World"><!---->二、Hello World<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/overview/hello-world.html#三、jdk和jre有什么区别" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="三、JDK和JRE有什么区别？"><!---->三、JDK和JRE有什么区别？<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/overview/hello-world.html#_01、jdk" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="01、JDK"><!---->01、JDK<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/overview/hello-world.html#_02、jre" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="02、JRE"><!---->02、JRE<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.2 Java基础语法</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.3 面向对象编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.4 字符串&amp;数组</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.5 集合框架（容器）</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.6 IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.11 并发编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->第一个Java程序：Hello World</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2019年1月1日</span><meta property="datePublished" content="2019-01-01T00:00:00.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 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property="articleSection" content="Java核心"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon 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content="PT7M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/overview/hello-world.html#一、安装集成开发环境intellij-idea" class="router-link-active router-link-exact-active toc-link level2">一、安装集成开发环境Intellij IDEA</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/overview/hello-world.html#_01、下载-idea" class="router-link-active router-link-exact-active toc-link level3">01、下载 IDEA</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/overview/hello-world.html#_02、安装-idea" class="router-link-active router-link-exact-active toc-link level3">02、安装 IDEA</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/overview/hello-world.html#_03、启动-idea" class="router-link-active router-link-exact-active toc-link level3">03、启动 IDEA</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/overview/hello-world.html#二、hello-world" class="router-link-active router-link-exact-active toc-link level2">二、Hello World</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/overview/hello-world.html#三、jdk和jre有什么区别" class="router-link-active router-link-exact-active toc-link level2">三、JDK和JRE有什么区别？</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/overview/hello-world.html#_01、jdk" class="router-link-active router-link-exact-active toc-link level3">01、JDK</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/overview/hello-world.html#_02、jre" class="router-link-active router-link-exact-active toc-link level3">02、JRE</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="第一个java程序-hello-world" tabindex="-1"><a class="header-anchor" href="#第一个java程序-hello-world" aria-hidden="true">#</a> 第一个Java程序：Hello World</h1><h2 id="一、安装集成开发环境intellij-idea" tabindex="-1"><a class="header-anchor" href="#一、安装集成开发环境intellij-idea" aria-hidden="true">#</a> 一、安装集成开发环境Intellij IDEA</h2><p>IntelliJ IDEA 简称 IDEA，是业界公认为最好的 Java 集成开发工具，尤其是在代码自动提示、代码重构、代码版本管理、单元测试、代码分析等方面有着亮眼的发挥。</p><p>IDEA 产于捷克，开发人员以严谨著称的东欧程序员为主，分为社区版和付费版两个版本。我们在学习阶段，社区版就足够用了。</p><p>回想起我最初学 Java 的时候，老师要求我们在记事本上敲代码，在命令行中编译和执行 Java 代码，搞得全班三分之二的同学都做好了放弃学习 Java 的打算。</p><p>鉴于此，我强烈推荐大家使用集成开发工具，比如说 IntelliJ IDEA 来学习。</p><p>IDEA 分为社区版和付费版两个版本。</p><h3 id="_01、下载-idea" tabindex="-1"><a class="header-anchor" href="#_01、下载-idea" aria-hidden="true">#</a> 01、下载 IDEA</h3><p>IntelliJ IDEA 的官方下载地址为：<a href="https://www.jetbrains.com/idea/download" target="_blank" rel="noopener noreferrer">https://www.jetbrains.com/idea/download/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><p><img src="https://cdn.jsdelivr.net/gh/itwanger/itwanger.github.io/assets/images/2019/11/java-idea-community-1.png" alt=""></p><p>UItimate 为付费版，可以免费试用，主要针对的是 Web 和企业开发用户；Community 为免费版，可以免费使用，主要针对的是 Java 初学者和安卓开发用户。</p><p>功能上的差别如下图所示。</p><p><img src="https://cdn.jsdelivr.net/gh/itwanger/itwanger.github.io/assets/images/2019/11/java-idea-community-2.png" alt=""></p><p>本篇教程主要针对的是 Java 初学者，所以选择免费版为例，点击「Download」进行下载。</p><p>稍等一分钟时间，大概 580M。</p><h3 id="_02、安装-idea" tabindex="-1"><a class="header-anchor" href="#_02、安装-idea" aria-hidden="true">#</a> 02、安装 IDEA</h3><p>双击运行 IDEA 安装程序，一步步傻瓜式的下一步就行了。</p><p><img src="https://cdn.jsdelivr.net/gh/itwanger/itwanger.github.io/assets/images/2019/11/java-idea-community-3.png" alt=""></p><p><img src="https://cdn.jsdelivr.net/gh/itwanger/itwanger.github.io/assets/images/2019/11/java-idea-community-4.png" alt=""></p><p><img src="https://cdn.jsdelivr.net/gh/itwanger/itwanger.github.io/assets/images/2019/11/java-idea-community-5.png" alt=""></p><p>为了方便启动 IDEA，可以勾选【64-bit launcher】复选框。为了关联 Java 源文件，可以勾选【.java】复选框。</p><p><img src="https://cdn.jsdelivr.net/gh/itwanger/itwanger.github.io/assets/images/2019/11/java-idea-community-6.png" alt=""></p><p>点击【Install】后，需要静静地等待一会，大概一分钟的时间，趁机休息一下眼睛。</p><p><img src="https://cdn.jsdelivr.net/gh/itwanger/itwanger.github.io/assets/images/2019/11/java-idea-community-7.png" alt=""></p><p>安装完成后的界面如下图所示。</p><p><img src="https://cdn.jsdelivr.net/gh/itwanger/itwanger.github.io/assets/images/2019/11/java-idea-community-8.png" alt=""></p><h3 id="_03、启动-idea" tabindex="-1"><a class="header-anchor" href="#_03、启动-idea" aria-hidden="true">#</a> 03、启动 IDEA</h3><p>回到桌面，双击运行 IDEA 的快捷方式，启动 IDEA。</p><p><img src="https://cdn.jsdelivr.net/gh/itwanger/itwanger.github.io/assets/images/2019/11/java-idea-community-9.png" alt=""></p><p>假装阅读完条款后，勾选同意复选框，点击【Continue】</p><p><img src="https://cdn.jsdelivr.net/gh/itwanger/itwanger.github.io/assets/images/2019/11/java-idea-community-10.png" alt=""></p><p>如果想要帮助 IDEA 收集改进信息，可以点击【Send Usage Statistics】；否则点击【Don&#39;t send】。</p><p><img src="https://cdn.jsdelivr.net/gh/itwanger/itwanger.github.io/assets/images/2019/11/java-idea-community-11.png" alt=""></p><p>到此，Intellij IDEA 的安装就完成了，很简单。</p><h2 id="二、hello-world" tabindex="-1"><a class="header-anchor" href="#二、hello-world" aria-hidden="true">#</a> 二、Hello World</h2><p>第一个 Java 程序非常简单，代码如下：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token doc-comment comment">/**
  * <span class="token keyword">@author</span> 微信搜「沉默王二」，回复关键字 PDF
  */</span>
 <span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">HelloWorld</span> <span class="token punctuation">{</span>
@@ -52,6 +52,6 @@
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>IDEA 会自动保存，在代码编辑面板中右键，在弹出的菜单中选择「Run &#39;HelloWorld.main()&#39;」，如下图所示：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/overview/four-01.png" alt=""></p><p>等代码编译结束后，就可以在 Run 面板里看到下面的内容：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>三妹，少看手机少打游戏，好好学，美美哒。
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>“二哥，上面这段代码的输出结果虽然令我非常开心，但是有好多生疏的关键字令我感到困惑，能给我解释一下吗？”</p><p>“当然没问题啊。”</p><ul><li><p>class 关键字：用于在 Java 中声明一个类。</p></li><li><p>public 关键字：一个表示可见性的访问修饰符。</p></li><li><p>static 关键字：我们可以用它来声明任何一个方法，被 static 修饰后的方法称之为静态方法。静态方法不需要为其创建对象就能调用。</p></li><li><p>void 关键字：表示该方法不返回任何值。</p></li><li><p>main 关键字：表示该方法为主方法，也就是程序运行的入口。<code>main()</code> 方法由 Java 虚拟机执行，配合上 static 关键字后，可以不用创建对象就可以调用，可以节省不少内存空间。</p></li><li><p><code>String [] args</code>：<code>main()</code> 方法的参数，类型为 String 数组，参数名为 args。</p></li><li><p><code>System.out.println()</code>：一个 Java 语句，一般情况下是将传递的参数打印到控制台。System 是 java.lang 包中的一个 final 类，该类提供的设施包括标准输入，标准输出和错误输出流等等。out 是 System 类的静态成员字段，类型为 PrintStream，它与主机的标准输出控制台进行映射。println 是 PrintStream 类的一个方法，通过调用 print 方法并添加一个换行符实现的。</p></li></ul><h2 id="三、jdk和jre有什么区别" tabindex="-1"><a class="header-anchor" href="#三、jdk和jre有什么区别" aria-hidden="true">#</a> 三、JDK和JRE有什么区别？</h2><h3 id="_01、jdk" tabindex="-1"><a class="header-anchor" href="#_01、jdk" aria-hidden="true">#</a> 01、JDK</h3><p>JDK 是 Java Development Kit 的首字母缩写，是提供给 Java 程序员的开发工具包，换句话说，没有 JDK，Java 程序员就无法使用 Java 语言编写 Java 程序。也就是说，JDK 是用于开发 Java 程序的最小环境。</p><p>想要成为一名 Java 程序员，首先就需要在电脑上安装 JDK。当然了，新版的 Intellij IDEA（公认最好用的集成开发环境）已经支持直接下载 JDK 了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/overview/six-01.png" alt=""></p><p>并且支持下载不同版本的 JDK，除了 Oracle 的 OpenJDK，还有社区维护版 AdoptOpenJDK，里面包含了目前使用范围最广的 HotSpot 虚拟机。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/overview/six-02.png" alt=""></p><p>如果下载比较慢的话，可以直接在 AdoptOpenJDK 官网上下载。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/overview/six-03.png" alt=""></p><p>如果还是比较慢的话，通过 Oracle 官网下载吧！</p><blockquote><p>https://www.oracle.com/java/technologies/javase-jdk11-downloads.html</p></blockquote><p>JDK 安装成功后，就可以编写 Java 代码了，小伙伴们可以参照上一篇文章《<a href="https://mp.weixin.qq.com/s/GYDFndO0Q1Nqzcc_Te61gw" target="_blank" rel="noopener noreferrer">Hello World<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>》。</p><p>JDK 包含了 JRE，同时还包含了编译 Java 源码的编译器 javac，以及其他的一些重要工具：</p><ul><li>keytool：用于操作 keystore 密钥；</li><li>javap：class 类文件的最基础的反编译器；</li><li>jstack：用于打印 Java 线程栈踪迹的工具；</li><li>jconsole：用于监视 Java 程序的工具；</li><li>jhat：用于 Java 堆分析的工具</li><li>jar：用于打包 Java 程序的工具；</li><li>javadoc：用于生成 Java 文档的工具；</li></ul><h3 id="_02、jre" tabindex="-1"><a class="header-anchor" href="#_02、jre" aria-hidden="true">#</a> 02、JRE</h3><p>JRE 是 Java Runtime Environment 的首字母缩写，是提供给 Java 程序运行的最小环境，换句话说，没有 JRE，Java 程序就无法运行。</p><p>Java 程序运行的正式环境一般会选择 Linux 服务器，因为更安全、更高效、更稳定。我们只需要在 Linux 服务器上安装 JRE 就可以运行 Java 程序，而不必安装 JDK，因为我们不需要在服务器上编译和调试 Java 源代码。</p><p>刚好我有一台闲置的阿里云服务器，这里就给小伙伴们演示一下 JRE 的安装过程。</p><p>第一步：使用以下命令列出服务器上可以安装的 Java 环境：</p><blockquote><p>yum list java*</p></blockquote><p>可以看到有这么一些（只列出 Java 11 的部分——最近一个 LTS 版本）：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/overview/six-04.png" alt=""></p><p>其中 JRE 为 java-11-openjdk.x86_64，JDK 为 java-11-openjdk-devel.x86_64。</p><p>第二步，使用以下命令安装 JRE：</p><blockquote><p>yum install java-11-openjdk.x86_64</p></blockquote><p>第三步，使用以下命令测试是否安装成功：</p><blockquote><p>java -version</p></blockquote><p>如果出现以下结果，则表明安装成功：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/overview/six-05.png" alt=""></p><p>由于 JRE 中不包含 javac，所以 <code>javac -version</code> 的结果如下所示：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/overview/six-06.png" alt=""></p><p>那既然服务器上的 JRE 环境已经 OK 了，那我们就把之前的“Hello World”程序打成 jar 上传过去，让它跑起来。</p><p>第一步，Maven clean（对项目清理）：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/overview/six-07.png" alt=""></p><p>第二步，Maven package（对项目打包）：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/overview/six-08.png" alt=""></p><p>可以在 Run 面板中看到以下信息：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/overview/six-09.png" alt=""></p><p>说明项目打包成功了。</p><p>第三步，使用 FileZilla 工具将 jar 包上传到服务器指定目录。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/overview/six-10.png" alt=""></p><p>第四步，使用 iTerm2 工具连接服务器。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/overview/six-11.png" alt=""></p><p>第五步，执行以下命令：</p><blockquote><p>java -cp TechSister-1.0-SNAPSHOT.jar com.itwanger.five.HelloWorld</p></blockquote><p>可以看到以下结果：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/overview/six-12.png" alt=""></p><p>“搞定了，三妹，今天我们就学到这吧。”转动了一下僵硬的脖子后，我对三妹说，“开发环境需要安装 JDK，因为既需要编写源代码，还需要打包和测试；生产环境只需要安装 JRE，因为只需要运行编译打包好的 jar 包即可。”</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/overview/hello-world.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path 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class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/overview/what-is-java.html#_01、什么是-java" class="router-link-active router-link-exact-active toc-link level2">01、什么是 Java？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/overview/what-is-java.html#_02、java的发展简史" class="router-link-active router-link-exact-active toc-link level2">02、Java的发展简史</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/overview/what-is-java.html#_03、java的优势" class="router-link-active router-link-exact-active toc-link level2">03、Java的优势</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="什么是java" tabindex="-1"><a class="header-anchor" href="#什么是java" aria-hidden="true">#</a> 什么是Java？</h1><h2 id="_01、什么是-java" tabindex="-1"><a class="header-anchor" href="#_01、什么是-java" aria-hidden="true">#</a> 01、什么是 Java？</h2><p>“二哥，到底什么是 Java？给我说说呗。”</p><p>“三妹啊，这就直奔主题了啊，先去给哥买包烟吧，哥先考验考验你的诚心。”</p><p>（五分钟过后）</p><p>“三妹啊，你怎么还不去？”</p><p>“二哥，掏钱啊。”</p><p>（真实亲妹子啊，买包烟还得我掏钱，关键是还得给跑腿费。十分钟后，三妹从楼下小卖部买了一包熊猫回来了，我用 Zippo 火机点了一支——这火机是 21 岁生日的时候初恋女友送我的，质量确实不错，现在还在用。）</p><p>“三妹啊，听我慢慢来给你解释。”</p><p>Java 是一门计算机编程语言，高级、健壮、面向对象，并且非常安全。它由 Sun 公司在 1995 年开发，主力开发叫 James Gosling，被称为 Java 之父，就是下图这位，头秃的厉害。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/overview/one-01.png" alt=""></p><p>“三妹啊，你要不要再考虑考虑？做程序员不容易啊”</p><p>“二哥，你咋没有秃呢？是因为你不够厉害吗？”</p><p>（这孩子，嘴咋这么损呢？）</p><p>Java 在叫“Java”之前，其实叫 Oak（橡树的意思，我感觉好像比 Java 好听一些）。怎么想到呢？James Gosling 坐在办公室，望向窗外，视野里出现了一颗橡树。不过，遗憾的是，Oak 已经被 另外一家公司注册了，因此 1995 年 5 月 23 日，Oak 语言改名为 Java。</p><p>Java 起初并不是 James Gosling 的首选，也不是命名团队的首选。团队其他人员更青睐 Silk（丝绸），但 Gosling 不喜欢，他本人喜欢的是 Lyric（抒情诗），但没通过律师这一关。最后，排在第四位的“Java”脱颖而出。是不是像极了婴儿没生下来之前，家人就着急着起名的那种感觉。</p><p>James Gosling 回忆说，“Java”是一个叫 Mark Opperman 的人提议的，他是在一家咖啡店得到灵感的，“Java”是印度尼西亚爪哇岛的英文名，因生产咖啡而闻名。</p><p>使用十六进制编辑器打开由 Java 源代码编译出的二进制文件（.class 文件），就可以看得到，最前面的 8 个字符是 CA FE BA BE（定义文件类型的魔数），即词组“CAFE BABE”（咖啡屋宝贝）。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/overview/one-02.png" alt=""></p><p>“二哥，能给我展示一段 Java 代码吗？我想感受一下。”</p><p>“三妹啊，马上就来。”</p><p>（我噼里啪啦一阵在键盘上一阵狂按）</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">HelloWorld</span> <span class="token punctuation">{</span>
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clickable active"><!----><span class="title">2.1 Java概述</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a aria-current="page" href="/overview/what-is-java.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="什么是Java？"><!---->什么是Java？<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/overview/what-is-java.html#_01、什么是-java" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="01、什么是 Java？"><!---->01、什么是 Java？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/overview/what-is-java.html#_02、java的发展简史" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="02、Java的发展简史"><!---->02、Java的发展简史<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" 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class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->什么是Java？</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener 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33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2021年7月30日</span><meta property="datePublished" content="2021-07-30T01:01:39.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><meta property="articleSection" content="Java核心"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 15 分钟</span><meta property="timeRequired" content="PT15M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/overview/what-is-java.html#_01、什么是-java" class="router-link-active router-link-exact-active toc-link level2">01、什么是 Java？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/overview/what-is-java.html#_02、java的发展简史" class="router-link-active router-link-exact-active toc-link level2">02、Java的发展简史</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/overview/what-is-java.html#_03、java的优势" class="router-link-active router-link-exact-active toc-link level2">03、Java的优势</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="什么是java" tabindex="-1"><a class="header-anchor" href="#什么是java" aria-hidden="true">#</a> 什么是Java？</h1><h2 id="_01、什么是-java" tabindex="-1"><a class="header-anchor" href="#_01、什么是-java" aria-hidden="true">#</a> 01、什么是 Java？</h2><p>“二哥，到底什么是 Java？给我说说呗。”</p><p>“三妹啊，这就直奔主题了啊，先去给哥买包烟吧，哥先考验考验你的诚心。”</p><p>（五分钟过后）</p><p>“三妹啊，你怎么还不去？”</p><p>“二哥，掏钱啊。”</p><p>（真实亲妹子啊，买包烟还得我掏钱，关键是还得给跑腿费。十分钟后，三妹从楼下小卖部买了一包熊猫回来了，我用 Zippo 火机点了一支——这火机是 21 岁生日的时候初恋女友送我的，质量确实不错，现在还在用。）</p><p>“三妹啊，听我慢慢来给你解释。”</p><p>Java 是一门计算机编程语言，高级、健壮、面向对象，并且非常安全。它由 Sun 公司在 1995 年开发，主力开发叫 James Gosling，被称为 Java 之父，就是下图这位，头秃的厉害。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/overview/one-01.png" alt=""></p><p>“三妹啊，你要不要再考虑考虑？做程序员不容易啊”</p><p>“二哥，你咋没有秃呢？是因为你不够厉害吗？”</p><p>（这孩子，嘴咋这么损呢？）</p><p>Java 在叫“Java”之前，其实叫 Oak（橡树的意思，我感觉好像比 Java 好听一些）。怎么想到呢？James Gosling 坐在办公室，望向窗外，视野里出现了一颗橡树。不过，遗憾的是，Oak 已经被 另外一家公司注册了，因此 1995 年 5 月 23 日，Oak 语言改名为 Java。</p><p>Java 起初并不是 James Gosling 的首选，也不是命名团队的首选。团队其他人员更青睐 Silk（丝绸），但 Gosling 不喜欢，他本人喜欢的是 Lyric（抒情诗），但没通过律师这一关。最后，排在第四位的“Java”脱颖而出。是不是像极了婴儿没生下来之前，家人就着急着起名的那种感觉。</p><p>James Gosling 回忆说，“Java”是一个叫 Mark Opperman 的人提议的，他是在一家咖啡店得到灵感的，“Java”是印度尼西亚爪哇岛的英文名，因生产咖啡而闻名。</p><p>使用十六进制编辑器打开由 Java 源代码编译出的二进制文件（.class 文件），就可以看得到，最前面的 8 个字符是 CA FE BA BE（定义文件类型的魔数），即词组“CAFE BABE”（咖啡屋宝贝）。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/overview/one-02.png" alt=""></p><p>“二哥，能给我展示一段 Java 代码吗？我想感受一下。”</p><p>“三妹啊，马上就来。”</p><p>（我噼里啪啦一阵在键盘上一阵狂按）</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">HelloWorld</span> <span class="token punctuation">{</span>
     <span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">void</span> <span class="token function">main</span><span class="token punctuation">(</span><span class="token class-name">String</span><span class="token punctuation">[</span><span class="token punctuation">]</span> args<span class="token punctuation">)</span> <span class="token punctuation">{</span>
         <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">&quot;Hello World&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
     <span class="token punctuation">}</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>“二哥，这都什么跟什么啊，看得一头雾水。”</p><p>“三妹啊，先不要着急，Hello World 这段代码以后再慢慢消化，现在就是让它来给你打个招呼。”</p><p>“好吧。”</p><p>“二哥，学 Java 到底有没有前途啊？我毕业以后能不能找到工作啊？”</p><p>“三妹啊，就目前来说，Java 不仅仅是一门编程语言，它还是一个由一系列计算机软件和规范组成的技术体系，这个技术体系提供了完整的用于软件开发和跨平台部署的支持环境，并广泛应用于以下这些场合。”</p><p>1）桌面应用程序； 2）Web 应用程序； 3）企业应用程序，体现了 Java 的安全性、负载均衡和集群的优势； 4）移动端应用程序，主要就是安卓； 5）嵌入式系统； 6）机器人技术； 7）游戏。</p><p>时至今日，Java 技术体系已经吸引了 600 多万软件开发者，是全球最大的软件开发团队。Java 能够获得如此广泛的认可，除了它是一门结构严谨、面向对象的编程语言之外，还有很多其他不可忽视的优点：</p><ul><li>摆脱了硬件平台的束缚，实现了“一次编写，处处运行”的理念；</li><li>内存管理相对安全，避免了绝大部分内存泄露和指针越界的问题；</li><li>实现了热点代码检测和运行时编译，使得 Java 应用能随着运行时间的增长而获得更高的性能；</li><li>有一套完善的应用程序接口，还有无数来自商业机构和开源社区的第三方类库。</li></ul><p>这一切的一切，都让软件开发的效率大大的提高。所以，学习 Java 还是很有“钱”“秃”的。</p><h2 id="_02、java的发展简史" tabindex="-1"><a class="header-anchor" href="#_02、java的发展简史" aria-hidden="true">#</a> 02、Java的发展简史</h2><p>20 世纪 90 年代，单片式计算机系统诞生。单片式计算机系统不仅廉价（之前的计算机非常庞大，并且昂贵），而且功能强大，可以大幅度提升消费性电子产品的智能化程度。</p><p>Sun 公司为了抢占市场先机，在 1991 年成立了一个由詹姆斯·高斯林（James Gosling）领导的，名为“Green”的项目组，目的是开发一种能够在各种消费性电子产品上运行的程序架构。</p><p>项目组首先考虑的是采用 C++ 来编写程序，但 C++ 过于复杂和庞大，再加上消费电子产品所采用的嵌入式处理器芯片的种类繁杂，需要让编写的程序能够跨平台运行并不容易——C++ 在跨平台方面做得并不好。</p><p>思前想后，项目组最后决定：在 C++ 的基础上创建一种新的编程语言，既能够剔除 C++ 复杂的指针和内存管理，还能够兼容各种设备。这语言最初的名字叫做 <strong>Greentalk</strong>，文件扩展名为 <code>.gt</code>。这个名字叫的比较随意，就因为项目组叫 Green，没什么特殊的寓意。</p><p><strong>Oak</strong> 是“Java”的第二个名字，这次就有点意义了。Oak（橡树）是力量的象征，被美国、法国、德国等许多欧美国家选为国树。橡树长下面这样。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/overview/two-01.png" alt=""></p><p>1992 年，Oak 的雏形有了，但项目组在向硬件生产商进行商演的时候，并没有获得认可，于是 Oak 就被搁置一旁了。</p><p>1994 年，项目组发现 Java 更适合进行 Internet 编程。随后，项目组用 Oak 语言研发了一种能将小程序嵌入到网页中执行的技术——Applet。Applet 不仅能嵌入网页，还能够随同网页在网络上进行传输。</p><p>不得不感慨一下，技术的更新迭代是真的快，Applet 拯救了 Oak，并使其蜕变成顶天立地的 Java，但很早之前就被无情地拍死在了沙滩上。是不是很残酷？</p><p>1995 年，Oak 被重新命名为“Java”，因为 Oak 被别的公司注册过了。新的名字最好能够表达出技术的本质：dynamic（动态的）、revolutionary（革命性的）、Silk（像丝绸一样柔软的）、Cool（炫酷的）等等。另外，名字一定要容易拼写，念起来也比较有趣。</p><p>选来选去，项目组最后选择了“Java”，中文叫“爪哇”。细心的小伙伴可能会发现，Java 这个单词里有一个敏感词，所以有段时间微信（文章专辑名这块）为了禁敏感词，竟然把 Java 都禁了，我当时就只能用爪哇来代替 Java，手动狗头。</p><p>“Java”是印度尼西亚爪哇岛的英文名，因生产咖啡而闻名，所以，小伙伴也看到了，Java 这个单词经常和一杯冒着热气的咖啡一起出现。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/overview/two-02.png" alt=""></p><p>同年，Sun 公司在 SunWorld 大会上正式发布了 Java 1.0 版本，第一次提出了“Write Once, Run anywhere”的口号。《时代》杂志将 Java 评为 1995 年十大最佳产品之一。</p><p>1996 年 1 月 23 日，JDK 1.0 发布，Java 语言有了第一个正式版本的运行环境。JDK 1.0 是一个纯解释执行的 Java 虚拟机，代表技术有：Java 虚拟机、AWT（图形化界面）、Applet。</p><p>4 月，十个主要的操作系统和计算机供应商宣称将在产品中嵌入 Java 技术。9 月，已有大约 8.3 万网页应用采用了 Java 来制作。5 月底，第一届 JavaOne 大会在旧金山举行，从此，JavaOne 成为全世界数百万 Java 语言开发者的技术盛会。</p><p>1997 年 2 月 19 日，JDK 1.1 发布，代表技术有：JAR 文件格式、JDBC、JavaBeans、RMI（远程方法调用）。</p><p>1998 年 12 月 4 日，JDK 1.2 发布，这是一个里程碑式的版本。Sun 在这个版本中把 Java 拆分为三个方向：面向桌面开发的 J2SE、面向企业开发的 J2EE，面向移动开发的 J2ME。代表技术有：EJB、Swing。</p><p>2000 年 5 月 8 日，JDK 1.3 发布，对 Java 2D 做了大幅修改。</p><p>2002 年 2 月 13 日，JDK 1.4 发布，这是 Java 真正走向成熟的一个版本，IBM、富士通等著名公司都有参与。代表技术有：正则表达式、NIO。</p><p>2004 年 9 月 30 日，JDK 5 发布，注意 Sun 把“1.x”的命名方式抛弃了。JDK 5 在 Java 语法的易用性上做出了非常大的改进，比如说：自动装箱、泛型、动态注解、枚举、可变参数、foreach 循环。</p><p>2006 年 12 月 11 日，JDK 6 发布，J2SE 变成了 Java SE 6，J2EE 变成了 Java EE 6，J2ME 变成了 Java ME 6。JDK 6 恐怕是 Java 历史上使用寿命最长的一个版本了。主要的原因有：代码复杂性的增加、世界经济危机、Oracle 对 Sun 的收购。</p><p>JDK 6 的最后一个升级补丁为 Java SE 6 Update 211， 于 2018 年 10 月 18 日发布——12 年的跨度啊！</p><p>2009 年 2 月 19 日，JDK 7 发布，但功能是阉割。很多翘首以盼的功能都没有完成，比如说 Lambda 表达式。主要是因为 Sun 公司在商业上陷入了泥沼，已经无力推动 JDK 7 的研发工作。</p><p>2009 年 4 月 20 日，Oracle 以 74 亿美元的价格收购了市值曾超过 2000 亿美元的 Sun 公司——太阳终究还是落山了。对于 Java 语言这个孩子来说，可以说是好事，也可以说是坏事。好事是 Oracle 有钱，能够注入资金推动 Java 的发展；坏处就是 Oracle 是后爸，对 Java 肯定没有 Sun 那么亲，走的是极具商业化的道路。</p><p>2014 年 3 月 18 日，JDK 8 终于来了，步伐是那么蹒跚，但终究还是来了。带着最强有力的武器——Lambda 表达式而来。虽然 JDK 15 已经发布了，但“新版任你发，我用 Java 8”的梗至今还流传着。</p><p>2017 年 9 月 21 日，JDK 9 发布。从此以后，JDK 更新版本的速度令开发者应接不暇，半年一个版本，虽然 Oracle 的目的是好的，为了避免因功能增加而引发的跳票风险，但不得不承认，版本更新的节奏实在是有点过于频繁。</p><p>这就导致一个问题，好不容易更新一个版本，用了六个月后，Oracle 不维护了。针对这个问题，Oracle 给出的解决方案挺奇葩的，每六个 JDK 大版本才会被长期支持（Long Term Support，LTS）。</p><p>JDK 8 是 LTS 版，2018 年 9 月 25 日发布的 JDK 11 是 LTS 版， 2018 年 3 月 20 日发布的 JDK 10 就可以一笔带过了。按照这个节奏算下去的话，下一个 LTS 版就是 2021 年发布的 JDK 17 了。</p><p>JDK 12、JDK 13、JDK 14、JDK 15、JDK 16 都是过渡产品，就好像是试验品一样，不太受开发者待见。</p><p>Java 发展到今天已经 20 多年了，作为一个编程语言确实不简单，Java 代表的面向对象思想确实给工程领域带来了革命性的变化，关键是 Java 一直在拥抱变化。</p><p>大数据方面，有 Apache Kafka、Apache Samza、Apache Storm、Apache Spark、Apache Flink，除了 Spark 是基于 JVM 的函数语言 Scala 编写的，其余都是 Java 编写的。</p><p>Java 在云时代面临着以 Go 语言为主的容器（Docker 等技术）生态圈的挑战，但是，Java 的大型分布式系统越来越多，Java 在云计算与分布式系统中还是扮演着主要角色，并且形成了一个大型的生态圈。</p><p>虽然 Java 和 C++，C 一样，都“老”了，被其他语言不断地挑战，但只有强者才有机会接受挑战，对吧？我相信，Java 的未来依然很光明。</p><h2 id="_03、java的优势" tabindex="-1"><a class="header-anchor" href="#_03、java的优势" aria-hidden="true">#</a> 03、Java的优势</h2><p>尽管 Java 已经 25 岁了，但仍然“宝刀未老”。在 Stack Overflow 2019 年流行编程语言调查报告中，Java 位居第 5 位，有 41% 的受调开发者认为 Java 仍然是一门受欢迎的编程语言。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/overview/three-01.png" alt=""></p><p>很多大型的互联网公司都在使用 Java，国内最有名的当属阿里巴巴，国外最有名的当属谷歌。那为什么 Java 如此流行呢？</p><p><strong>1）简单性</strong></p><p>Java 为开发者提供了简单易用的用户体验，与其他面向对象编程语言相比，Java 的设计和生态库具有巨大的优势。Java 剔除了 C++ 中很少使用、难以理解、易混淆的特别，比如说指针运算、操作符重载，内存管理等。</p><p>Java 可以做到堆栈分配、垃圾回收和自动内存管理，在一定程度上为开发者减轻了入门的难度。</p><p><strong>2）可移植性</strong></p><p>如果 Java 直接编译成操作系统能识的二进制码，可能一个标识在 Windows 操作系统下是1100，而 Linux 下是 1001，这样的话，在 Windows 操作系统下可以运行的程序到了 Linux 环境下就无法运行。</p><p>为了解决这个问题，Java 先编译生成字节码，再由 JVM（Java 虚拟机）来解释执行，目的就是将统一的字节码转成操作系统可以识别的二进制码，然后执行。而针对不同的操作系统，都有相应版本的 JVM，所以 Java 就实现了可移植性。</p><p><strong>3）安全性</strong></p><p>Java 适用于网络/分布式环境，为了达到这个目标，在安全方面投入了巨大的精力。使用 Java 可以构建防病毒、防篡改的程序。</p><p>从一开始，Java 就设计了很多可以防范攻击的机制，比如说：</p><ul><li>运行时堆栈溢出，这是蠕虫病毒常用的攻击手段。</li><li>字节码验证，可以确保代码符合 JVM 规范并防止恶意代码破坏运行时环境。</li><li>安全的类加载，可以防止不受信任的代码干扰 Java 程序的运行。</li><li>全面的 API 支持广泛的加密服务，包括数字签名、消息摘要、（对称、非对称）密码、密钥生成器。</li><li>安全通信，支持 HTTPS、SSL，保护传输的数据完整性和隐私性。</li></ul><p><strong>4）并发性</strong></p><p>Java 在多线程方面做得非常突出，只要操作系统支持，Java 中的线程就可以利用多个处理器，带来了更好的交互响应和实时行为。</p><p>“二哥，那 Java 还会继续流行下去吗？”三妹眨了眨她的长睫毛，对我说。</p><p>“当然。”我斩钉截铁地回答到。</p><p><strong>大数据领域：</strong></p><p>与 Python 一样，Java 在大数据领域占据着主导地位，很多用于处理大规模数据的框架都是基于 Java 开发的。</p><ul><li><p>Apache Hadoop，用于在分布式环境中处理大规模数据集。Hadoop 采用了主副架构模式，其中主节点负责控制整个分布式计算栈。Hadoop 在需要处理和分析大规模数据的公司当中很流行。</p></li><li><p>Apache Spark，大型的 ETL（数据仓库技术）、预测分析和报表程序经常使用到 Spark。</p></li><li><p>Apache Mahout，用于机器学习，比如分类、聚类和推荐。</p></li><li><p>JFreechart，用于可视化数据，可以用它制作各种图表，比如饼图、柱状图、线图、散点图、盒状图、直方图等等。</p></li><li><p>Deeplearning4j，用于构建各种类型的神经网络，可以与 Spark 集成，运行在 GPU（图形处理器）上。</p></li><li><p>Apache Storm，用于处理实时数据流，一个 Storm 节点可以在秒级处理数百万个作业。</p></li></ul><p><strong>物联网（IoT）领域：</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/overview/three-02.png" alt=""></p><p>Oracle 表示，灵活性和流行度是 IoT 程序员选择 Java 的主要原因。Java 提供了大量的 API 库，可以很容易应用到嵌入式应用程序中。相比其他编程语言，比如 C 语言，Java 在切换平台时更加顺畅，不容易出错。</p><p><strong>金融服务领域：</strong></p><ul><li><p>聊天机器人，由于可移植性、可维护性、可视化等诸多方面的因素，Java 成了开发聊天机器人最好的工具。</p></li><li><p>欺诈检测和管理，银行和金融公司使用 AI（人工智能）工具来进行金融欺诈和信用卡欺诈检测，而 Java 常用来开发这些 AI 工具。</p></li><li><p>交易系统，Java 虚拟机提供的动态运行时编译优化在很多情况下比编译型语言（如 C++）具有更好的性能，让交易系统运行得更顺畅。</p></li><li><p>移动钱包，基于 AI 和 Java 算法开发的移动钱包，可以帮助用户在花钱时做出更智能的决策。</p></li></ul><p><strong>Web 领域：</strong></p><p>Java 技术对 Web 领域的发展注入了强大的动力，主流的 Java Web 开发框架有很多：</p><ul><li><p>Spring 框架，一个轻量级的控制反转（IoC）和面向切面（AOP）的容器框架，渗透了 Java EE 技术的方方面面，绝大部分 Java 应用都可以从 Spring 框架中受益。</p></li><li><p>Spring MVC 框架，是一种基于 Java 实现的 MVC（Model-View-Controller）设计模式的请求驱动类型的轻量级 Web 框架。</p></li><li><p>MyBatis 框架，一个优秀的数据持久层框架，可在实体类和 SQL 语句之间建立映射关系，是一种半自动化的 ORM（Object Relational Mapping，对象关系映射）实现。</p></li><li><p>JavaServer Faces 框架，由 Oracle 开发，能够将表示层与应用程序代码轻松连接，它提供了一个 API 集，用于表示和管理 UI 组件。</p></li></ul><p>总之，Oracle 宣称，Java 正运行在 97% 的企业计算机上——有点厉害的样子。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" 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clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Spring Boot 整合 Redis  缓存</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 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aria-current="page" href="/redis/redis-springboot.html#安装-redis" class="router-link-active router-link-exact-active toc-link level3">安装 Redis</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/redis/redis-springboot.html#redis-数据类型" class="router-link-active router-link-exact-active toc-link level3">Redis 数据类型</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/redis/redis-springboot.html#spring-boot-整合-redis" class="router-link-active router-link-exact-active toc-link level3">Spring Boot 整合 Redis</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/redis/redis-springboot.html#编程喵整合-redis" class="router-link-active router-link-exact-active toc-link level3">编程喵整合 Redis</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/redis/redis-springboot.html#使用-redis-连接池" class="router-link-active router-link-exact-active toc-link level3">使用 Redis 连接池</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/redis/redis-springboot.html#自由操作-redis" class="router-link-active router-link-exact-active toc-link level3">自由操作 Redis</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/redis/redis-springboot.html#项目源码" class="router-link-active router-link-exact-active toc-link level3">项目源码</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><p>作为开发者，相信大家都知道 Redis 的重要性。Redis 是使用 C 语言开发的一个高性能键值对数据库，是互联网技术领域使用最为广泛的存储中间件，它是「Remote Dictionary Service」的首字母缩写，也就是「远程字典服务」。</p><p>Redis 以超高的性能、完美的文档、简洁的源码著称，国内外很多大型互联网公司都在用，比如说阿里、腾讯、GitHub、Stack Overflow 等等。当然了，中小型公司也都在用。</p><h3 id="安装-redis" tabindex="-1"><a class="header-anchor" href="#安装-redis" aria-hidden="true">#</a> 安装 Redis</h3><p>Redis 的官网提供了各种平台的安装包，Linux、macOS、Windows 的都有。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/redis-springboot-182f2469-b7f2-4fec-bd41-e5a33dca185a.png" alt=""></p><blockquote><p>官方地址：<a href="https://redis.io/docs/getting-started/" target="_blank" rel="noopener noreferrer">https://redis.io/docs/getting-started/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>我目前用的是 macOS，直接执行 <code>brew install redis</code> 就可以完成安装了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/redis-springboot-cdf02715-5ed6-44b5-a1ce-db0249107dd7.png" alt=""></p><p>完成安装后执行 <code>redis-server</code> 就可以启动 Redis 服务了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/redis-springboot-8c272a19-e961-449c-afee-c973fb44a5e0.png" alt=""></p><p>Windows 用户可以通过我之前提到的 <a href="https://mp.weixin.qq.com/s/Hgm3ZAbOeBqpSUsJZBtlNg" target="_blank" rel="noopener noreferrer">chocolatey 命令行软件管理神器<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>安装（可以戳链接了解详情），只需要一行命令 <code>choco install redis</code> 就可以完成安装了，非常方便。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/redis-springboot-13b569ca-e747-4d64-af0d-a9a5d0260f5f.png" alt=""></p><p>生产环境中，我们通常会在 Linux 上安装 Redis。我的服务器上安装了宝塔面板，可以直接在软件商店里搜「Redis」关键字，然后直接安装（我已经安装过了）。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/redis-springboot-df5e600b-1290-447c-b140-6f513c69492c.png" alt=""></p><p>顺带安装一下 Redis 客户端工具，推荐 GitHub 星标 20k+ 的 AnotherRedisDesktopManager，一款 🚀🚀🚀 更快、更好、更稳定的Redis桌面(GUI)管理客户端，支持 Windows、macOS 和 Linux，性能出众，可以轻松加载海量键值。</p><blockquote><p><a href="https://github.com/qishibo/AnotherRedisDesktopManager" target="_blank" rel="noopener noreferrer">https://github.com/qishibo/AnotherRedisDesktopManager<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>安装完成后，链接 Redis 服务：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/redis-springboot-d36b9022-fe3b-4fb1-80c3-8d23d19d9025.png" alt=""></p><h3 id="redis-数据类型" tabindex="-1"><a class="header-anchor" href="#redis-数据类型" aria-hidden="true">#</a> Redis 数据类型</h3><p>Redis支持五种数据类型：string（字符串），hash（哈希），list（列表），set（集合）及zset(sorted set：有序集合)。</p><blockquote><p>Redis 教程：<a href="https://www.redis.net.cn/tutorial/3508.html" target="_blank" rel="noopener noreferrer">https://www.redis.net.cn/tutorial/3508.html<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><strong>1）string</strong></p><p>string 是 Redis 最基本的数据类型，一个key对应一个value。</p><p>我们可以通过 AnotherRedisDesktopManager 客户端来练习一下基本的 set、get 命令（参考 Redis 文档，客户端会有提示，所以命令完全不用死记硬背）。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/redis-springboot-d7d4043b-b753-484c-bfc1-25533004cca5.png" alt=""></p><p>对应文本命令：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>### 增加一个 key 为 name，value 为 沉默王二
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href="/springboot/springtask.html" class="nav-link sidebar-link sidebar-page" aria-label="整合SpringTask"><!---->整合SpringTask<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/kaiyuan/auto-generator.html" class="nav-link sidebar-link sidebar-page" aria-label="整合MyBatis-Plus AutoGenerator"><!---->整合MyBatis-Plus AutoGenerator<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/springboot/macos-codingmore-run.html" class="nav-link sidebar-link sidebar-page" aria-label="macOS下如何运行编程喵源码"><!---->macOS下如何运行编程喵源码<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/springboot/windows-codingmore-run.html" class="nav-link sidebar-link sidebar-page" aria-label="Windows下如何运行编程喵源码"><!---->Windows下如何运行编程喵源码<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.5 辅助工具</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.6 开源轮子</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.7 分布式</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.8 消息队列</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Spring Boot 整合 Redis  缓存</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon 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18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category5" role>Java企业级开发</li><meta property="articleSection" content="Java企业级开发"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag1" role>Spring Boot</li><li class="tag tag3" role>Redis</li></ul><meta property="keywords" content="Spring Boot,Redis"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 13 分钟</span><meta property="timeRequired" content="PT13M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/redis/redis-springboot.html#安装-redis" class="router-link-active router-link-exact-active toc-link level2">安装 Redis</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/redis/redis-springboot.html#redis-数据类型" class="router-link-active router-link-exact-active toc-link level2">Redis 数据类型</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/redis/redis-springboot.html#spring-boot-整合-redis" class="router-link-active router-link-exact-active toc-link level2">Spring Boot 整合 Redis</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/redis/redis-springboot.html#编程喵整合-redis" class="router-link-active router-link-exact-active toc-link level2">编程喵整合 Redis</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/redis/redis-springboot.html#使用-redis-连接池" class="router-link-active router-link-exact-active toc-link level2">使用 Redis 连接池</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/redis/redis-springboot.html#自由操作-redis" class="router-link-active router-link-exact-active toc-link level2">自由操作 Redis</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/redis/redis-springboot.html#项目源码" class="router-link-active router-link-exact-active toc-link level2">项目源码</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><p>作为开发者，相信大家都知道 Redis 的重要性。Redis 是使用 C 语言开发的一个高性能键值对数据库，是互联网技术领域使用最为广泛的存储中间件，它是「Remote Dictionary Service」的首字母缩写，也就是「远程字典服务」。</p><p>Redis 以超高的性能、完美的文档、简洁的源码著称，国内外很多大型互联网公司都在用，比如说阿里、腾讯、GitHub、Stack Overflow 等等。当然了，中小型公司也都在用。</p><h2 id="安装-redis" tabindex="-1"><a class="header-anchor" href="#安装-redis" aria-hidden="true">#</a> 安装 Redis</h2><p>Redis 的官网提供了各种平台的安装包，Linux、macOS、Windows 的都有。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/redis-springboot-182f2469-b7f2-4fec-bd41-e5a33dca185a.png" alt=""></p><blockquote><p>官方地址：<a href="https://redis.io/docs/getting-started/" target="_blank" rel="noopener noreferrer">https://redis.io/docs/getting-started/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>我目前用的是 macOS，直接执行 <code>brew install redis</code> 就可以完成安装了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/redis-springboot-cdf02715-5ed6-44b5-a1ce-db0249107dd7.png" alt=""></p><p>完成安装后执行 <code>redis-server</code> 就可以启动 Redis 服务了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/redis-springboot-8c272a19-e961-449c-afee-c973fb44a5e0.png" alt=""></p><p>Windows 用户可以通过我之前提到的 <a href="https://mp.weixin.qq.com/s/Hgm3ZAbOeBqpSUsJZBtlNg" target="_blank" rel="noopener noreferrer">chocolatey 命令行软件管理神器<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>安装（可以戳链接了解详情），只需要一行命令 <code>choco install redis</code> 就可以完成安装了，非常方便。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/redis-springboot-13b569ca-e747-4d64-af0d-a9a5d0260f5f.png" alt=""></p><p>生产环境中，我们通常会在 Linux 上安装 Redis。我的服务器上安装了宝塔面板，可以直接在软件商店里搜「Redis」关键字，然后直接安装（我已经安装过了）。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/redis-springboot-df5e600b-1290-447c-b140-6f513c69492c.png" alt=""></p><p>顺带安装一下 Redis 客户端工具，推荐 GitHub 星标 20k+ 的 AnotherRedisDesktopManager，一款 🚀🚀🚀 更快、更好、更稳定的Redis桌面(GUI)管理客户端，支持 Windows、macOS 和 Linux，性能出众，可以轻松加载海量键值。</p><blockquote><p><a href="https://github.com/qishibo/AnotherRedisDesktopManager" target="_blank" rel="noopener noreferrer">https://github.com/qishibo/AnotherRedisDesktopManager<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>安装完成后，链接 Redis 服务：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/redis-springboot-d36b9022-fe3b-4fb1-80c3-8d23d19d9025.png" alt=""></p><h2 id="redis-数据类型" tabindex="-1"><a class="header-anchor" href="#redis-数据类型" aria-hidden="true">#</a> Redis 数据类型</h2><p>Redis支持五种数据类型：string（字符串），hash（哈希），list（列表），set（集合）及zset(sorted set：有序集合)。</p><blockquote><p>Redis 教程：<a href="https://www.redis.net.cn/tutorial/3508.html" target="_blank" rel="noopener noreferrer">https://www.redis.net.cn/tutorial/3508.html<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><strong>1）string</strong></p><p>string 是 Redis 最基本的数据类型，一个key对应一个value。</p><p>我们可以通过 AnotherRedisDesktopManager 客户端来练习一下基本的 set、get 命令（参考 Redis 文档，客户端会有提示，所以命令完全不用死记硬背）。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/redis-springboot-d7d4043b-b753-484c-bfc1-25533004cca5.png" alt=""></p><p>对应文本命令：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>## 增加一个 key 为 name，value 为 沉默王二
 &gt; set name &#39;沉默王二&#39;
 OK
-### 获取
+## 获取
 &gt; get name
 沉默王二
 &gt; set name &#39;沉默王三&#39;
 OK
 &gt; get name
 沉默王三
-### 删除
+## 删除
 &gt; del name
 1
 &gt; get name
 null
-### 测试是否存在 name
+## 测试是否存在 name
 &gt; EXISTS key
 0
 &gt; EXISTS name
 0
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p><strong>2）hash</strong></p><p>Redis hash 是一个键值对集合，值可以看成是一个 Map。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>### 清除数据库
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p><strong>2）hash</strong></p><p>Redis hash 是一个键值对集合，值可以看成是一个 Map。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>## 清除数据库
 &gt; flushdb
 OK
-### 创建 hash，key 为 user_hset 字段为 user1，值为 沉默王二
+## 创建 hash，key 为 user_hset 字段为 user1，值为 沉默王二
 &gt; hset user_hset user1 沉默王二
 1
 &gt; hset user_hset user2 沉默王三
 1
-### 字段长度
+## 字段长度
 &gt; hlen user_hset
 2
-### 所有字段
+## 所有字段
 &gt; HKEYS user_hset
 user1
 user2
-### 所有值
+## 所有值
 &gt; hvals user_hset
 沉默王二
 沉默王三
-### 字段 user1 的值
+## 字段 user1 的值
 &gt; hget user_hset user1
 沉默王二
-### 获取 key 为 user_hset 的所有字段和值
+## 获取 key 为 user_hset 的所有字段和值
 &gt; hgetall user_hset
 user1
 沉默王二
 user2
 沉默王三
-### 更新字段
+## 更新字段
 &gt; hset user_hset user1 沉默王四
 0
 &gt; hgetall user_hset
@@ -103,17 +103,17 @@ user2
 &gt; hgetall user_hset
 user2
 沉默王三
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p><strong>3）list</strong></p><p>list 是一个简单的字符串列表，按照插入顺序排序。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>### 添加 key 为 user_list value 为 沉默王二、沉默万三的集合
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p><strong>3）list</strong></p><p>list 是一个简单的字符串列表，按照插入顺序排序。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>## 添加 key 为 user_list value 为 沉默王二、沉默万三的集合
 &gt; lpush user_list 沉默王二 沉默王三
 2
-### 查询
+## 查询
 &gt; lrange user_list 0 -1
 沉默王三
 沉默王二
-### 往尾部添加
+## 往尾部添加
 &gt; rpush user_list 沉默王二是沙比
 3
-### 头部添加
+## 头部添加
 &gt; lpush user_list 沉默王二是傻叉
 4
 &gt; lrange user_list 0 -1
@@ -121,7 +121,7 @@ user2
 沉默王三
 沉默王二
 沉默王二是沙比
-### 更新 index 为 0 的值
+## 更新 index 为 0 的值
 &gt; lset user_list 0 沉默王四
 OK
 &gt; lrange user_list 0 -1
@@ -129,28 +129,28 @@ OK
 沉默王三
 沉默王二
 沉默王二是沙比
-### 删除 index 为 0 的值
+## 删除 index 为 0 的值
 &gt; lrem user_list 0 沉默王四
 1
 &gt; lrange user_list 0 -1
 沉默王三
 沉默王二
 沉默王二是沙比
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p><strong>4）set</strong></p><p>set 是 string 类型的无序集合，不允许有重复的元素。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>### 添加 key 为 user_set value 为沉默王二 沉默王三 沉默王二的狗腿子的集合
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p><strong>4）set</strong></p><p>set 是 string 类型的无序集合，不允许有重复的元素。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>## 添加 key 为 user_set value 为沉默王二 沉默王三 沉默王二的狗腿子的集合
 &gt; sadd user_set 沉默王二 沉默王三 沉默王二的狗腿子
 3
-### 查询
+## 查询
 &gt; smembers user_set
 沉默王二
 沉默王二的狗腿子
 沉默王三
-### 删除 value 为沉默王二的元素
+## 删除 value 为沉默王二的元素
 &gt; srem user_set 沉默王二
 1
 &gt; smembers user_set
 沉默王二的狗腿子
 沉默王三
-### 添加
+## 添加
 &gt; sadd user_set 沉默王二
 1
 &gt; smembers user_set
@@ -159,23 +159,23 @@ OK
 沉默王三
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p><strong>5）sorted set</strong></p><p>sorted set 是 string 类型的有序集合，不允许有重复的元素。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&gt; FLUSHDB
 OK
-### 添加 key 为 user_zset 分数为 1 值为沉默王二、分数为 2 值为沉默王三、分数为 3 值为沉默王二的狗腿子
+## 添加 key 为 user_zset 分数为 1 值为沉默王二、分数为 2 值为沉默王三、分数为 3 值为沉默王二的狗腿子
 &gt; zadd user_zset 1 沉默王二 2 沉默王三 3 沉默王二的狗腿子
 3
-### 查询
+## 查询
 &gt; zrange user_zset 0 -1
 沉默王二
 沉默王三
 沉默王二的狗腿子
-### 反转
+## 反转
 &gt; zrevrange user_zset 0 -1
 沉默王二的狗腿子
 沉默王三
 沉默王二
-### 查询元素沉默王二的分数
+## 查询元素沉默王二的分数
 &gt; zscore user_zset 沉默王二
 1
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="spring-boot-整合-redis" tabindex="-1"><a class="header-anchor" href="#spring-boot-整合-redis" aria-hidden="true">#</a> Spring Boot 整合 Redis</h3><p>第一步，在 pom.xml 文件中添加 Redis 的 starter。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h2 id="spring-boot-整合-redis" tabindex="-1"><a class="header-anchor" href="#spring-boot-整合-redis" aria-hidden="true">#</a> Spring Boot 整合 Redis</h2><p>第一步，在 pom.xml 文件中添加 Redis 的 starter。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
     &lt;groupId&gt;org.springframework.boot&lt;/groupId&gt;
     &lt;artifactId&gt;spring-boot-starter-data-redis&lt;/artifactId&gt;
 &lt;/dependency&gt;
@@ -220,7 +220,7 @@ OK
     <span class="token punctuation">}</span>
 
 <span class="token punctuation">}</span>
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>RedisTemplate 和 StringRedisTemplate 都是 Spring Data Redis 提供的模板类，可以对 Redis 进行操作，后者针对键值对都是 String 类型的数据，前者可以是任何类型的对象。</p><p>RedisTemplate 和 StringRedisTemplate 除了提供 opsForValue 方法来操作字符串之外，还提供了以下方法：</p><ul><li>opsForList：操作 list</li><li>opsForSet：操作 set</li><li>opsForZSet：操作有序 set</li><li>opsForHash：操作 hash</li></ul><p>运行测试类后可以在控制台看到以下输出信息：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/redis-springboot-f4456aea-2e48-4bad-910d-2d963ef0224e.png" alt=""></p><p>也可以通过 AnotherRedisDesktopManager 客户端查看 Redis 数据库中的数据。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/redis-springboot-f7551ebb-0bde-4084-9ab0-4a724d8ad2ec.png" alt=""></p><h3 id="编程喵整合-redis" tabindex="-1"><a class="header-anchor" href="#编程喵整合-redis" aria-hidden="true">#</a> 编程喵整合 Redis</h3><p>编程喵是一个 Spring Boot + Vue 的前后端分离项目，要整合 Redis 的话，最好的方式是使用 Spring Cache，仅仅通过 @Cacheable、@CachePut、@CacheEvict、@EnableCaching 等注解就可以轻松使用 Redis 做缓存了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/redis-springboot-eb6d69d7-9152-4695-87c7-cba138ca93fd.png" alt=""></p><p><strong>1）@EnableCaching</strong>，开启缓存功能。</p><p><strong>2）@Cacheable</strong>，调用方法前，去缓存中找，找到就返回，找不到就执行方法，并将返回值放到缓存中。</p><p><strong>3）@CachePut</strong>，方法调用前不会去缓存中找，无论如何都会执行方法，执行完将返回值放到缓存中。</p><p><strong>4）@CacheEvict</strong>，清理缓存中的一个或多个记录。</p><p>Spring Cache 是 Spring 提供的一套完整的缓存解决方案，虽然它本身没有提供缓存的实现，但它提供的一整套接口、规范、配置、注解等，可以让我们无缝衔接 Redis、Ehcache 等缓存实现。</p><p>Spring Cache 的注解（前面提到的四个）会在调用方法之后，去缓存方法返回的最终结果；或者在方法调用之前拿缓存中的结果，当然还有删除缓存中的结果。</p><p>这些读写操作不用我们手动再去写代码实现了，直接交给 Spring Cache 来打理就 OK 了，是不是非常贴心？</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/redis-springboot-afed274d-458d-4e6e-9fd0-b421ac811f47.png" alt=""></p><p><strong>第一步</strong>，在 pom.xml 文件中追加 Redis 的 starter。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>RedisTemplate 和 StringRedisTemplate 都是 Spring Data Redis 提供的模板类，可以对 Redis 进行操作，后者针对键值对都是 String 类型的数据，前者可以是任何类型的对象。</p><p>RedisTemplate 和 StringRedisTemplate 除了提供 opsForValue 方法来操作字符串之外，还提供了以下方法：</p><ul><li>opsForList：操作 list</li><li>opsForSet：操作 set</li><li>opsForZSet：操作有序 set</li><li>opsForHash：操作 hash</li></ul><p>运行测试类后可以在控制台看到以下输出信息：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/redis-springboot-f4456aea-2e48-4bad-910d-2d963ef0224e.png" alt=""></p><p>也可以通过 AnotherRedisDesktopManager 客户端查看 Redis 数据库中的数据。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/redis-springboot-f7551ebb-0bde-4084-9ab0-4a724d8ad2ec.png" alt=""></p><h2 id="编程喵整合-redis" tabindex="-1"><a class="header-anchor" href="#编程喵整合-redis" aria-hidden="true">#</a> 编程喵整合 Redis</h2><p>编程喵是一个 Spring Boot + Vue 的前后端分离项目，要整合 Redis 的话，最好的方式是使用 Spring Cache，仅仅通过 @Cacheable、@CachePut、@CacheEvict、@EnableCaching 等注解就可以轻松使用 Redis 做缓存了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/redis-springboot-eb6d69d7-9152-4695-87c7-cba138ca93fd.png" alt=""></p><p><strong>1）@EnableCaching</strong>，开启缓存功能。</p><p><strong>2）@Cacheable</strong>，调用方法前，去缓存中找，找到就返回，找不到就执行方法，并将返回值放到缓存中。</p><p><strong>3）@CachePut</strong>，方法调用前不会去缓存中找，无论如何都会执行方法，执行完将返回值放到缓存中。</p><p><strong>4）@CacheEvict</strong>，清理缓存中的一个或多个记录。</p><p>Spring Cache 是 Spring 提供的一套完整的缓存解决方案，虽然它本身没有提供缓存的实现，但它提供的一整套接口、规范、配置、注解等，可以让我们无缝衔接 Redis、Ehcache 等缓存实现。</p><p>Spring Cache 的注解（前面提到的四个）会在调用方法之后，去缓存方法返回的最终结果；或者在方法调用之前拿缓存中的结果，当然还有删除缓存中的结果。</p><p>这些读写操作不用我们手动再去写代码实现了，直接交给 Spring Cache 来打理就 OK 了，是不是非常贴心？</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/redis-springboot-afed274d-458d-4e6e-9fd0-b421ac811f47.png" alt=""></p><p><strong>第一步</strong>，在 pom.xml 文件中追加 Redis 的 starter。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
     &lt;groupId&gt;org.springframework.boot&lt;/groupId&gt;
     &lt;artifactId&gt;spring-boot-starter-data-redis&lt;/artifactId&gt;
 &lt;/dependency&gt;
@@ -314,7 +314,7 @@ OK
     <span class="token punctuation">}</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>注意看 @CachePut 注解这行代码：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token annotation punctuation">@CachePut</span><span class="token punctuation">(</span>value <span class="token operator">=</span> <span class="token string">&quot;codingmore&quot;</span><span class="token punctuation">,</span> key <span class="token operator">=</span> <span class="token string">&quot;&#39;codingmore:postags:&#39;+#postAddTagParam.postTagId&quot;</span><span class="token punctuation">)</span>
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><ul><li>value：缓存名称，也就是缓存的命名空间，value 这里应该换成 namespace 更好一点；</li><li>key：用于在命名空间中缓存的 key 值，可以使用 SpEL 表达式，比如说 <code>&#39;codingmore:postags:&#39;+#postAddTagParam.postTagId</code>；</li><li>还有两个属性 unless 和 condition 暂时没用到，分别表示条件符合则不缓存，条件符合则缓存。</li></ul><p><strong>第五步</strong>，启动服务器端，启动客户端，修改标签进行测试。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/redis-springboot-6463fdda-6cc2-43f4-91e6-e0de9f0f1c0c.png" alt=""></p><p>通过 Red 客户端（一款 macOS 版的 Redis 桌面工具），可以看到刚刚更新的返回值已经添加到 Redis 中了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/redis-springboot-468a253d-931a-4e5b-8f7e-36ecc1561dac.png" alt=""></p><h3 id="使用-redis-连接池" tabindex="-1"><a class="header-anchor" href="#使用-redis-连接池" aria-hidden="true">#</a> 使用 Redis 连接池</h3><p>Redis 是基于内存的数据库，本来是为了提高程序性能的，但如果不使用 Redis 连接池的话，建立连接、断开连接就需要消耗大量的时间。</p><p>用了连接池，就可以实现在客户端建立多个连接，需要的时候从连接池拿，用完了再放回去，这样就节省了连接建立、断开的时间。</p><p>要使用连接池，我们得先了解 Redis 的客户端，常用的有两种：Jedis 和 Lettuce。</p><ul><li>Jedis：Spring Boot 1.5.x 版本时默认的 Redis 客户端，实现上是直接连接 Redis Server，如果在多线程环境下是非线程安全的，这时候要使用连接池为每个 jedis 实例增加物理连接；</li><li>Lettuce：Spring Boot 2.x 版本后默认的 Redis 客户端，基于 Netty 实现，连接实例可以在多个线程间并发访问，一个连接实例不够的情况下也可以按需要增加连接实例。</li></ul><p>它俩在 GitHub 上都挺受欢迎的，大家可以按需选用。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/redis-springboot-c94651b5-1e53-42e5-ad5f-162b4bf509a7.png" alt=""></p><p>我这里把两种客户端的情况都演示一下，方便小伙伴们参考。</p><p><strong>1）Lettuce</strong></p><p><strong>第一步</strong>，修改 application-dev.yml，添加 Lettuce 连接池配置（pool 节点）。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>spring:
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><ul><li>value：缓存名称，也就是缓存的命名空间，value 这里应该换成 namespace 更好一点；</li><li>key：用于在命名空间中缓存的 key 值，可以使用 SpEL 表达式，比如说 <code>&#39;codingmore:postags:&#39;+#postAddTagParam.postTagId</code>；</li><li>还有两个属性 unless 和 condition 暂时没用到，分别表示条件符合则不缓存，条件符合则缓存。</li></ul><p><strong>第五步</strong>，启动服务器端，启动客户端，修改标签进行测试。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/redis-springboot-6463fdda-6cc2-43f4-91e6-e0de9f0f1c0c.png" alt=""></p><p>通过 Red 客户端（一款 macOS 版的 Redis 桌面工具），可以看到刚刚更新的返回值已经添加到 Redis 中了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/redis-springboot-468a253d-931a-4e5b-8f7e-36ecc1561dac.png" alt=""></p><h2 id="使用-redis-连接池" tabindex="-1"><a class="header-anchor" href="#使用-redis-连接池" aria-hidden="true">#</a> 使用 Redis 连接池</h2><p>Redis 是基于内存的数据库，本来是为了提高程序性能的，但如果不使用 Redis 连接池的话，建立连接、断开连接就需要消耗大量的时间。</p><p>用了连接池，就可以实现在客户端建立多个连接，需要的时候从连接池拿，用完了再放回去，这样就节省了连接建立、断开的时间。</p><p>要使用连接池，我们得先了解 Redis 的客户端，常用的有两种：Jedis 和 Lettuce。</p><ul><li>Jedis：Spring Boot 1.5.x 版本时默认的 Redis 客户端，实现上是直接连接 Redis Server，如果在多线程环境下是非线程安全的，这时候要使用连接池为每个 jedis 实例增加物理连接；</li><li>Lettuce：Spring Boot 2.x 版本后默认的 Redis 客户端，基于 Netty 实现，连接实例可以在多个线程间并发访问，一个连接实例不够的情况下也可以按需要增加连接实例。</li></ul><p>它俩在 GitHub 上都挺受欢迎的，大家可以按需选用。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/redis-springboot-c94651b5-1e53-42e5-ad5f-162b4bf509a7.png" alt=""></p><p>我这里把两种客户端的情况都演示一下，方便小伙伴们参考。</p><p><strong>1）Lettuce</strong></p><p><strong>第一步</strong>，修改 application-dev.yml，添加 Lettuce 连接池配置（pool 节点）。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>spring:
     redis:
         lettuce:
           pool:
@@ -358,7 +358,7 @@ OK
             max-idle: 8 # 连接池最大空闲连接数
             min-idle: 0 # 连接池最小空闲连接数
             max-wait: -1ms # 连接池最大阻塞等待时间，负值表示没有限制
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>启动服务后，观察 redisTemplate 的 clientConfiguration 节点，可以看到它的值已经变成 DefaultJedisClientConfiguration 对象了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/redis-springboot-01aa7dc6-b9f7-46bd-b8a4-0a24e44185bc.png" alt=""></p><p>当然了，也可以不配置 Jedis 客户端的连接池，走默认的连接池配置。因为 Jedis 客户端默认增加了连接池的依赖包，在 pom.xml 文件中点开 Jedis 客户端依赖可以查看到。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/redis-springboot-c87d8e02-aace-4d86-8011-13e4087956e0.png" alt=""></p><h3 id="自由操作-redis" tabindex="-1"><a class="header-anchor" href="#自由操作-redis" aria-hidden="true">#</a> 自由操作 Redis</h3><p>Spring Cache 虽然提供了操作 Redis 的便捷方法，比如我们前面演示的 @CachePut 注解，但注解提供的操作非常有限，比如说它只能保存返回值到缓存中，而返回值并不一定是我们想要保存的结果。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/redis-springboot-f28a3b84-ed0b-4a78-a5e5-5803bae967be.png" alt=""></p><p>与其保存这个返回给客户端的 JSON 信息，我们更想保存的是更新后的标签。那该怎么自由地操作 Redis 呢？</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/redis-springboot-9b89af51-c2fd-4b2d-ba57-a59efa4cbffd.png" alt=""></p><p><strong>第一步</strong>，增加 RedisService 接口：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">interface</span> <span class="token class-name">RedisService</span> <span class="token punctuation">{</span>
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>启动服务后，观察 redisTemplate 的 clientConfiguration 节点，可以看到它的值已经变成 DefaultJedisClientConfiguration 对象了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/redis-springboot-01aa7dc6-b9f7-46bd-b8a4-0a24e44185bc.png" alt=""></p><p>当然了，也可以不配置 Jedis 客户端的连接池，走默认的连接池配置。因为 Jedis 客户端默认增加了连接池的依赖包，在 pom.xml 文件中点开 Jedis 客户端依赖可以查看到。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/redis-springboot-c87d8e02-aace-4d86-8011-13e4087956e0.png" alt=""></p><h2 id="自由操作-redis" tabindex="-1"><a class="header-anchor" href="#自由操作-redis" aria-hidden="true">#</a> 自由操作 Redis</h2><p>Spring Cache 虽然提供了操作 Redis 的便捷方法，比如我们前面演示的 @CachePut 注解，但注解提供的操作非常有限，比如说它只能保存返回值到缓存中，而返回值并不一定是我们想要保存的结果。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/redis-springboot-f28a3b84-ed0b-4a78-a5e5-5803bae967be.png" alt=""></p><p>与其保存这个返回给客户端的 JSON 信息，我们更想保存的是更新后的标签。那该怎么自由地操作 Redis 呢？</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/redis-springboot-9b89af51-c2fd-4b2d-ba57-a59efa4cbffd.png" alt=""></p><p><strong>第一步</strong>，增加 RedisService 接口：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">interface</span> <span class="token class-name">RedisService</span> <span class="token punctuation">{</span>
 
     <span class="token doc-comment comment">/**
      * 保存属性
@@ -402,7 +402,7 @@ OK
 
     <span class="token comment">// 更多代码参考：https://github.com/itwanger/coding-more/blob/main/codingmore-mbg/src/main/java/com/codingmore/service/impl/RedisServiceImpl.java</span>
 <span class="token punctuation">}</span>
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p><strong>第三步</strong>，在标签 PostTagController 中增加 Redis 测试用接口 simpleTest ：</p><hr><p>更多内容，只针对《Java 程序员进阶之路》星球用户开放，需要的小伙伴可以<a href="/redis/docs/zhishixingqiu/" class="">戳链接🔗</a>加入我们的星球，一起学习，一起卷。。<strong>编程喵</strong>🐱是一个 Spring Boot+Vue 的前后端分离项目，融合了市面上绝大多数流行的技术要点。通过学习实战项目，你可以将所学的知识通过实践进行检验、你可以拓宽自己的技术边界，你可以掌握一个真正的实战项目是如何从 0 到 1 的。</p><hr><h3 id="项目源码" tabindex="-1"><a class="header-anchor" href="#项目源码" aria-hidden="true">#</a> 项目源码</h3><blockquote><ul><li>编程喵：<a href="https://github.com/itwanger/coding-more" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/coding-more<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li>整合 Redis 专用：<a href="https://github.com/itwanger/codingmore-learning/tree/main/codingmore-redis" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/coding-more<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a 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class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/22 上午12:06:08</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/springboot/Filter-Interceptor-Listener.html" class="nav-link prev" aria-label="过滤器、拦截器、监听器"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->过滤器、拦截器、监听器</div></a><a href="/springboot/logback.html" class="nav-link next" aria-label="整合Logback"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">整合Logback<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
-    <script type="module" src="/assets/app.a0271b9c.js" defer></script>
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p><strong>第三步</strong>，在标签 PostTagController 中增加 Redis 测试用接口 simpleTest ：</p><hr><p>更多内容，只针对《Java 程序员进阶之路》星球用户开放，需要的小伙伴可以<a href="https://tobebetterjavaer.com/zhishixingqiu/" target="_blank" rel="noopener noreferrer">戳链接🔗<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>加入我们的星球，一起学习，一起卷。。<strong>编程喵</strong>🐱是一个 Spring Boot+Vue 的前后端分离项目，融合了市面上绝大多数流行的技术要点。通过学习实战项目，你可以将所学的知识通过实践进行检验、你可以拓宽自己的技术边界，你可以掌握一个真正的实战项目是如何从 0 到 1 的。</p><hr><h2 id="项目源码" tabindex="-1"><a class="header-anchor" href="#项目源码" aria-hidden="true">#</a> 项目源码</h2><blockquote><ul><li>编程喵：<a href="https://github.com/itwanger/coding-more" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/coding-more<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li>整合 Redis 专用：<a href="https://github.com/itwanger/codingmore-learning/tree/main/codingmore-redis" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/coding-more<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/redis/redis-springboot.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/6/10 下午7:28:25</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/springboot/Filter-Interceptor-Listener.html" class="nav-link prev" aria-label="过滤器、拦截器、监听器"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->过滤器、拦截器、监听器</div></a><a href="/springboot/logback.html" class="nav-link next" aria-label="整合Logback"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">整合Logback<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
+    <script type="module" src="/assets/app.615e41d8.js" defer></script>
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 </html>
diff --git a/dist/redis/rumen.html b/dist/redis/rumen.html
index 72a31e2f..80cd7df3 100644
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+++ b/dist/redis/rumen.html
@@ -39,10 +39,10 @@
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clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Redis入门(适合新手)</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 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id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/redis/rumen.html#_01、redis-是什么" class="router-link-active router-link-exact-active toc-link level3">01、Redis 是什么</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/redis/rumen.html#_02、安装-redis" class="router-link-active router-link-exact-active toc-link level3">02、安装 Redis</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/redis/rumen.html#_03、redis-的数据结构" class="router-link-active router-link-exact-active toc-link level3">03、Redis 的数据结构</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/redis/rumen.html#_04、实操-redis" class="router-link-active router-link-exact-active toc-link level3">04、实操 Redis</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/redis/rumen.html#_05、在-java-中使用-redis" class="router-link-active router-link-exact-active toc-link level3">05、在 Java 中使用 Redis</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/redis/rumen.html#_06、鸣谢" class="router-link-active router-link-exact-active toc-link level3">06、鸣谢</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="redis入门-适合新手" tabindex="-1"><a class="header-anchor" href="#redis入门-适合新手" aria-hidden="true">#</a> Redis入门(适合新手)</h1><p>说起来，可能有些小伙伴会不相信，我是第一次用 Redis，真的。因为公司小，业务量小，Redis 根本派不上用场。不过，最近打算把系统升级一下，顺带把当下时髦的技术入个门，“与时俱进”嘛，虽然进的有“一点点”晚（注意双引号）。</p><p>作为一名富有责任心的技术博主，我觉得有必要把我入门 Redis 的过程分享出来，供一些小伙伴作为参考。要是我哪里写错了，别客气，过来给我一巴掌，就行了（温柔点，别打肿，影响颜值就不好了）。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/rumen-fe7d042b-efed-469c-9460-fb3bc1d4c041.jpg" alt=""></p><h3 id="_01、redis-是什么" tabindex="-1"><a class="header-anchor" href="#_01、redis-是什么" aria-hidden="true">#</a> 01、Redis 是什么</h3><p>Redis 是互联网技术领域中使用最广泛的存储中间件，它是 <strong>Re</strong>mote <strong>Di</strong>ctionary <strong>S</strong>ervice 三个单词中加粗字母的组合。你别说，组合起来后念着挺自然的。</p><p>Redis 以超高的性能、完美的文档、简洁的源码著称，国内外很多大型互联网公司都在用，比如说阿里、腾讯、GitHub、Stack Overflow 等等。它的版本更新非常的快，功能也越来越强大，最初只是用来作为缓存数据库，现在已经可以用它来实现消息队列了。</p><p>可以这么说吧，掌握 Redis 已经变成了一项后端工程师必须具备的基础技能。</p><p>Redis 的作者是一名意大利人，网名 Antirez，长相还是过得去的，感兴趣的小伙伴可以 Google 一下。知道为什么 Redis 的默认端口是 6379 吗？</p><p>据说是手机键盘上“MERZ”的位置决定的，小伙伴们可以打开自己手机上九宫格键盘感受一下。“MERZ”是什么意思呢？据说是“愚蠢”的意思。这？是不是感觉程序员的生活中还是有蛮多神秘色彩的？</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/rumen-ced599df-4791-4777-970f-20ceeeb39e68.jpg" alt=""></p><h3 id="_02、安装-redis" tabindex="-1"><a class="header-anchor" href="#_02、安装-redis" aria-hidden="true">#</a> 02、安装 Redis</h3><p>Redis 针对不同的操作系统有不同的安装方式，我们这篇入门的文章就以 Windows 为例吧。</p><p>下载地址如下：</p><p><a href="https://github.com/MicrosoftArchive/redis/releases" target="_blank" rel="noopener noreferrer">https://github.com/MicrosoftArchive/redis/releases<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><p>Windows 最新的版本是 3.2.100。从下图中可以看得出，Redis 的体积非常的轻量级，还不到 6 M。体积越小，让我感觉 Redis 越牛逼，你是不是也有这种感觉？</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/rumen-a6709cca-d3a3-4381-b110-0ff37d384f27.jpg" alt=""></p><p>有两种安装方式，第一种是 msi 的方式，双击运行后安装；第二种是免安装，绿色版，只需要把 zip 包解压就可以了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/rumen-f3fc9852-7505-45ed-8ce2-d16f1d888251.jpg" alt=""></p><p>里面有一份英文版的文档——Windows Service Documentation.docx，教我们如何安装 Redis 服务、如何启动、如何关闭，以及如何使用自定义端口启动服务。</p><p>打开命令行，进入到当前解压后的目录，输入启动命令：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>redis-server redis.windows.conf
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clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">四、数据库</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">MySQL</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">Redis</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a aria-current="page" href="/redis/rumen.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="Redis入门"><!---->Redis入门<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a 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Redis<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/redis/rumen.html#_05、在-java-中使用-redis" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="05、在 Java 中使用 Redis"><!---->05、在 Java 中使用 Redis<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/redis/rumen.html#_06、鸣谢" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="06、鸣谢"><!---->06、鸣谢<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/redis/xuebeng-chuantou-jichuan.html" class="nav-link sidebar-link sidebar-page" aria-label="缓存雪崩、穿透、击穿"><!---->缓存雪崩、穿透、击穿<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">MongoDB</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Redis入门(适合新手)</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月17日</span><meta property="datePublished" content="2022-03-17T03:18:03.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category6" role>数据库</li><meta property="articleSection" content="数据库"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag3" role>Redis</li></ul><meta property="keywords" content="Redis"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 8 分钟</span><meta property="timeRequired" content="PT8M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/redis/rumen.html#_01、redis-是什么" class="router-link-active router-link-exact-active toc-link level3">01、Redis 是什么</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/redis/rumen.html#_02、安装-redis" class="router-link-active router-link-exact-active toc-link level3">02、安装 Redis</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/redis/rumen.html#_03、redis-的数据结构" class="router-link-active router-link-exact-active toc-link level3">03、Redis 的数据结构</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/redis/rumen.html#_04、实操-redis" class="router-link-active router-link-exact-active toc-link level3">04、实操 Redis</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/redis/rumen.html#_05、在-java-中使用-redis" class="router-link-active router-link-exact-active toc-link level3">05、在 Java 中使用 Redis</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/redis/rumen.html#_06、鸣谢" class="router-link-active router-link-exact-active toc-link level3">06、鸣谢</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="redis入门-适合新手" tabindex="-1"><a class="header-anchor" href="#redis入门-适合新手" aria-hidden="true">#</a> Redis入门(适合新手)</h1><p>说起来，可能有些小伙伴会不相信，我是第一次用 Redis，真的。因为公司小，业务量小，Redis 根本派不上用场。不过，最近打算把系统升级一下，顺带把当下时髦的技术入个门，“与时俱进”嘛，虽然进的有“一点点”晚（注意双引号）。</p><p>作为一名富有责任心的技术博主，我觉得有必要把我入门 Redis 的过程分享出来，供一些小伙伴作为参考。要是我哪里写错了，别客气，过来给我一巴掌，就行了（温柔点，别打肿，影响颜值就不好了）。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/rumen-fe7d042b-efed-469c-9460-fb3bc1d4c041.jpg" alt=""></p><h3 id="_01、redis-是什么" tabindex="-1"><a class="header-anchor" href="#_01、redis-是什么" aria-hidden="true">#</a> 01、Redis 是什么</h3><p>Redis 是互联网技术领域中使用最广泛的存储中间件，它是 <strong>Re</strong>mote <strong>Di</strong>ctionary <strong>S</strong>ervice 三个单词中加粗字母的组合。你别说，组合起来后念着挺自然的。</p><p>Redis 以超高的性能、完美的文档、简洁的源码著称，国内外很多大型互联网公司都在用，比如说阿里、腾讯、GitHub、Stack Overflow 等等。它的版本更新非常的快，功能也越来越强大，最初只是用来作为缓存数据库，现在已经可以用它来实现消息队列了。</p><p>可以这么说吧，掌握 Redis 已经变成了一项后端工程师必须具备的基础技能。</p><p>Redis 的作者是一名意大利人，网名 Antirez，长相还是过得去的，感兴趣的小伙伴可以 Google 一下。知道为什么 Redis 的默认端口是 6379 吗？</p><p>据说是手机键盘上“MERZ”的位置决定的，小伙伴们可以打开自己手机上九宫格键盘感受一下。“MERZ”是什么意思呢？据说是“愚蠢”的意思。这？是不是感觉程序员的生活中还是有蛮多神秘色彩的？</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/rumen-ced599df-4791-4777-970f-20ceeeb39e68.jpg" alt=""></p><h3 id="_02、安装-redis" tabindex="-1"><a class="header-anchor" href="#_02、安装-redis" aria-hidden="true">#</a> 02、安装 Redis</h3><p>Redis 针对不同的操作系统有不同的安装方式，我们这篇入门的文章就以 Windows 为例吧。</p><p>下载地址如下：</p><p><a href="https://github.com/MicrosoftArchive/redis/releases" target="_blank" rel="noopener noreferrer">https://github.com/MicrosoftArchive/redis/releases<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><p>Windows 最新的版本是 3.2.100。从下图中可以看得出，Redis 的体积非常的轻量级，还不到 6 M。体积越小，让我感觉 Redis 越牛逼，你是不是也有这种感觉？</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/rumen-a6709cca-d3a3-4381-b110-0ff37d384f27.jpg" alt=""></p><p>有两种安装方式，第一种是 msi 的方式，双击运行后安装；第二种是免安装，绿色版，只需要把 zip 包解压就可以了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/rumen-f3fc9852-7505-45ed-8ce2-d16f1d888251.jpg" alt=""></p><p>里面有一份英文版的文档——Windows Service Documentation.docx，教我们如何安装 Redis 服务、如何启动、如何关闭，以及如何使用自定义端口启动服务。</p><p>打开命令行，进入到当前解压后的目录，输入启动命令：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>redis-server redis.windows.conf
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>然后你就会看到 Redis 启动后的欢迎画面，左边这个盒子感觉好有艺术感啊！有小伙伴知道是怎么生成的吗？</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/rumen-69b11133-7aac-4f8a-aa1e-9e8af576ad32.jpg" alt=""></p><p>还有一些其他的提示信息：</p><ul><li>Redis 当前的版本号为 3.2.100</li><li>端口是 6379</li><li>进程 ID，也就是 PID 为 12636</li><li>Redis 官方地址为：http://redis.io</li></ul><p>那如何停止服务呢？可以直接按下 <code>Ctrl+C</code> 组合键——粗暴、壁咚（当然可以直接点右上角的叉号）。</p><p>PS：本来想用 Linux 版或者 OSX 版的，怕入门的小伙伴没有环境。后面可以整一个。</p><h3 id="_03、redis-的数据结构" tabindex="-1"><a class="header-anchor" href="#_03、redis-的数据结构" aria-hidden="true">#</a> 03、Redis 的数据结构</h3><p>Redis 有 5 种基础数据结构，String、Hash、List、Set、SortedSet，也是学 Redis 必须掌握的。除此之外，还有 HyperLogLog、Geo、Pub/Sub，算是高级数据结构了。我们这篇入门的文章就以 String 为例吧。</p><p>String 结构使用非常广泛，比如说把用户的登陆信息转成 JSON 字符串后缓存起来，等需要取出的时候再反序列化一次。</p><p>小伙伴们应该都知道，Java 的 String 是不可变的，无法修改。Redis 的 String 是动态的，可以修改的，两者不同哦。关于 Redis 的 String 结构，我觉得老钱的 Redis 教程上讲得非常明白，大家一起拜读下。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/rumen-d9aca13e-053e-4aea-a8cb-d77b01e5035a.jpg" alt=""></p><blockquote><p>Redis 的 String 在内部结构实现上类似于 Java 的 ArrayList，采用预分配冗余空间的方式来减少内存的频繁分配。如上图所示，当前字符串实际分配的空间为 capacity，一般高于实际的字符串长度 len。当字符串长度小于 1M 时，扩容是对现有空间的成倍增长；如果长度超过 1M 时，扩容一次只会多增加 1M 的空间。最大长度为 512M。</p></blockquote><h3 id="_04、实操-redis" tabindex="-1"><a class="header-anchor" href="#_04、实操-redis" aria-hidden="true">#</a> 04、实操 Redis</h3><p>好了好了，我估计很多小伙伴们已经整装待发，准备实操一把了。这就来。</p><p>Redis 的解压目录下有一个名叫 redis-cli.exe 的文件，这是 Redis 自带的一个客户端工具，可以用来连接之前我们启动好的 Redis 服务。双击启动它。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/rumen-4fd63521-b07e-41c6-bcbd-b7acb2a81344.jpg" alt=""></p><p>这个客户端还是非常智能的，当键入命令的时候，会跳出对应的提示</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/rumen-6ca5d00d-4b5d-4475-a49c-9937e22f97af.jpg" alt=""></p><p>当按下空格跟进关键字的时候，对应位置上的提示会自动消失。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/rumen-656ec70a-c053-44ab-b078-a5c77386bee6.jpg" alt=""></p><p>以下是完整的键值对测试命令，小伙伴们可以按照格式动手实操一把。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&gt; set name cmower
 OK
 &gt; get name
@@ -107,6 +107,6 @@ exists：true
 del：1
 get：null
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>完全符合我们的预期，perfect！</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/redis/rumen-7135d995-f563-4021-b364-411b1be07b5a.jpg" alt=""></p><h3 id="_06、鸣谢" tabindex="-1"><a class="header-anchor" href="#_06、鸣谢" aria-hidden="true">#</a> 06、鸣谢</h3><p>好了，我亲爱的小伙伴们，以上就是本文的全部内容了，是不是看完后很想实操一把 Redis，赶快行动吧！如果你在学习的过程中遇到了问题，欢迎随时和我交流，虽然我也是个菜鸟，但我有热情啊。</p><p>另外，如果你想写入门级别的文章，这篇就是最好的范例。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/redis/rumen.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/12 下午4:24:21</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><!----><a href="/redis/xuebeng-chuantou-jichuan.html" class="nav-link next" aria-label="缓存雪崩、穿透、击穿"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">缓存雪崩、穿透、击穿<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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href="/redis/xuebeng-chuantou-jichuan.html#_2-2-解决方案" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="2.2 解决方案"><!---->2.2 解决方案<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/redis/xuebeng-chuantou-jichuan.html#方法一" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="方法一"><!---->方法一<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/redis/xuebeng-chuantou-jichuan.html#方法二" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="方法二"><!---->方法二<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/redis/xuebeng-chuantou-jichuan.html#_3-缓存穿透" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="3. 缓存穿透"><!---->3. 缓存穿透<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/redis/xuebeng-chuantou-jichuan.html#_3-1-业务场景举例" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="3.1 业务场景举例"><!---->3.1 业务场景举例<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/redis/xuebeng-chuantou-jichuan.html#_3-2-解决方案" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="3.2 解决方案"><!---->3.2 解决方案<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/redis/xuebeng-chuantou-jichuan.html#_4-业务可靠性处理" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="4. 业务可靠性处理"><!---->4. 业务可靠性处理<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">MongoDB</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->简单聊聊缓存雪崩、穿透、击穿</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月31日</span><meta property="datePublished" content="2022-03-31T01:32:14.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category6" role>数据库</li><meta property="articleSection" content="数据库"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag3" role>Redis</li></ul><meta property="keywords" content="Redis"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 7 分钟</span><meta property="timeRequired" content="PT7M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/redis/xuebeng-chuantou-jichuan.html#_1-缓存雪崩" class="router-link-active router-link-exact-active toc-link level2">1. 缓存雪崩</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/redis/xuebeng-chuantou-jichuan.html#_1-1-业务场景举例" class="router-link-active router-link-exact-active toc-link level3">1.1 业务场景举例</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/redis/xuebeng-chuantou-jichuan.html#_1-2-解决方案" class="router-link-active router-link-exact-active toc-link level3">1.2 解决方案</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/redis/xuebeng-chuantou-jichuan.html#_2-缓存击穿" class="router-link-active router-link-exact-active toc-link level2">2. 缓存击穿</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/redis/xuebeng-chuantou-jichuan.html#_2-1-业务场景举例" class="router-link-active router-link-exact-active toc-link level3">2.1 业务场景举例</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/redis/xuebeng-chuantou-jichuan.html#_2-2-解决方案" class="router-link-active router-link-exact-active toc-link level3">2.2 解决方案</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/redis/xuebeng-chuantou-jichuan.html#方法一" class="router-link-active router-link-exact-active toc-link level3">方法一</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/redis/xuebeng-chuantou-jichuan.html#方法二" class="router-link-active router-link-exact-active toc-link level3">方法二</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/redis/xuebeng-chuantou-jichuan.html#_3-缓存穿透" class="router-link-active router-link-exact-active toc-link level2">3. 缓存穿透</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/redis/xuebeng-chuantou-jichuan.html#_3-1-业务场景举例" class="router-link-active router-link-exact-active toc-link level3">3.1 业务场景举例</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/redis/xuebeng-chuantou-jichuan.html#_3-2-解决方案" class="router-link-active router-link-exact-active toc-link level3">3.2 解决方案</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/redis/xuebeng-chuantou-jichuan.html#_4-业务可靠性处理" class="router-link-active router-link-exact-active toc-link level2">4. 业务可靠性处理</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="简单聊聊缓存雪崩、穿透、击穿" tabindex="-1"><a class="header-anchor" href="#简单聊聊缓存雪崩、穿透、击穿" aria-hidden="true">#</a> 简单聊聊缓存雪崩、穿透、击穿</h1><p>大家好，我是二哥呀。作为后端开发，我想缓存是大家再熟悉不过的东西了。</p><p>本文会介绍<strong>出现缓存雪崩、穿透和击穿的业务背景、解决方案和对业务可靠性处理</strong>。事先说明，最佳解决方案一定需要结合实际业务调整，不同业务的处理不完全相同</p><p>其实我在网上也看过不少关于缓存雪崩、穿透、击穿介绍，不知道是不是大家所做业务的不同，发现有不少小伙伴有以下疑问，比如：</p><ul><li>加随机时间过期后，如果访问时间刚好就是加了随机时间后的数据，这样岂不是白加了随机时间？</li><li>热点数据不过期，那岂不是有越来越多的脏数据？</li></ul><p>就以上问题，我都会在文中一一解释，以下说的缓存都指 Redis。</p><p>我争取把这一高频面试题讲明白，如果大家看后能在这块内容和面试官面前谈笑风生，那你就是最靓的仔。</p><p>下面，我就开始进入正题啦。</p><h2 id="_1-缓存雪崩" tabindex="-1"><a class="header-anchor" href="#_1-缓存雪崩" aria-hidden="true">#</a> 1. 缓存雪崩</h2><p>即缓存同一时间大面积的失效，这个时候来了一大波请求，都怼到数据库上，最后数据库处理不过来崩了。</p><h3 id="_1-1-业务场景举例" tabindex="-1"><a class="header-anchor" href="#_1-1-业务场景举例" aria-hidden="true">#</a> 1.1 业务场景举例</h3><p>APP 首页有大量热点数据，在某大型活动期间，针对不同时间段需要展示不同的首页数据。</p><p>比如在 0 点时需要替换新的首页数据，此时旧首页数据过期，新首页数据刚开始加载。</p><p>而 0 点正在有个小活动开始，大批请求涌入。因为新数据刚开始加载，请求多数没有命中缓存，请求到了数据库，最后就把数据库打挂了。</p><h3 id="_1-2-解决方案" tabindex="-1"><a class="header-anchor" href="#_1-2-解决方案" aria-hidden="true">#</a> 1.2 解决方案</h3><p><strong>再强调一下，所谓的解决方案是需要根据实际业务调整，不同业务的处理不完全相同</strong></p><h4 id="_1-2-1-方法一" tabindex="-1"><a class="header-anchor" href="#_1-2-1-方法一" aria-hidden="true">#</a> 1.2.1 方法一</h4><p>常见方式就是给过期时间加个随机时间。</p><p>注意这个随机时间不是几秒哈，可以长达几分钟。因为如果数据量很大，按照上述例子，加上 Redis 是单线程处理数据的。那么几秒的缓冲不一定能够保证新数据都被加载完成。</p><p>所以过期时间宁愿设置长一点，也好过短一点。反正最后都是会过期掉，最终效果是一样的。</p><p>而且过期时间范围加大，key 会更加分散，这样也是一定程度缩短 Redis 在过期 key 时候的阻塞时间。</p><p>而至于文章开头说的：「如果访问时间刚好就是加了随机时间后的数据，这样岂不是白加了随机时间」。</p><p>现在你结合上例活动的例子，它还会是一个问题吗？结合业务，一定要结合业务。</p><h4 id="_1-2-2-方法二" tabindex="-1"><a class="header-anchor" href="#_1-2-2-方法二" aria-hidden="true">#</a> 1.2.2 方法二</h4><p>加互斥锁，但这个方案会导致吞吐量明显下降。所以还是要看实际业务，像上述例子就不合适用</p><h4 id="_1-2-3-方法三" tabindex="-1"><a class="header-anchor" href="#_1-2-3-方法三" aria-hidden="true">#</a> 1.2.3 方法三</h4><p>热点数据不设置过期。不过期的话，正常业务请求自然就不会打到数据库了。</p><p>那新的问题又来了，不过期有脏数据，怎么办？</p><p>很简单，活动整体结束后再删除嘛。</p><p>那像上述例子，可以怎么处理呢？—— 选择方法一；或者提前把 0 点需要的新数据加载进 Redis，不必等到 0 点才去加载，这样也是可以的</p><h2 id="_2-缓存击穿" tabindex="-1"><a class="header-anchor" href="#_2-缓存击穿" aria-hidden="true">#</a> 2. 缓存击穿</h2><p>缓存击穿是指一个热点 key 过期或被删除后，导致线上原本能命中该热点 key 的请求，瞬间大量地打到数据库上，最终导致数据库被击垮。</p><p>有种千里之堤，溃于蚁穴的感觉。</p><h3 id="_2-1-业务场景举例" tabindex="-1"><a class="header-anchor" href="#_2-1-业务场景举例" aria-hidden="true">#</a> 2.1 业务场景举例</h3><p>出现情况一般是误操作，比如设置错了过期时间、误删除导致的。</p><blockquote><p>谁还没误操作过呢，删库跑路了解一下。反正我误删过测试库的数据，幸好人没事，狗头保命。</p></blockquote><h3 id="_2-2-解决方案" tabindex="-1"><a class="header-anchor" href="#_2-2-解决方案" aria-hidden="true">#</a> 2.2 解决方案</h3><h3 id="方法一" tabindex="-1"><a class="header-anchor" href="#方法一" aria-hidden="true">#</a> 方法一</h3><p>代码问题，该 review 的 review。</p><p>热点数据到底要不要过期，什么时候过期要明确</p><p>既然是热点数据，大概率是核心流程。那么该保证的核心功能还是需要保证的，减少犯错机会。万一出问题，那就是用户的一波输出了。</p><h3 id="方法二" tabindex="-1"><a class="header-anchor" href="#方法二" aria-hidden="true">#</a> 方法二</h3><p>线上误操作的事情，该加强权限管理的加强，特别是线上权限，一定需要审核，以防手抖。</p><h2 id="_3-缓存穿透" tabindex="-1"><a class="header-anchor" href="#_3-缓存穿透" aria-hidden="true">#</a> 3. 缓存穿透</h2><p>缓存穿透是指：客户端请求缓存和数据库中不存在的数据，导致所有的请求都打到数据库上。如果请求很多，数据库依旧会挂得明明白白。</p><h3 id="_3-1-业务场景举例" tabindex="-1"><a class="header-anchor" href="#_3-1-业务场景举例" aria-hidden="true">#</a> 3.1 业务场景举例</h3><ul><li>数据库主键 id 都是正数，然后客户端发起了 <code>id = -1</code> 的查询</li><li>一个查询接口，有一个状态字段 status，其实 0 表示开始、1 表示结束。结果有请求一直发 <code>status=3</code> 的请求过来</li></ul><h3 id="_3-2-解决方案" tabindex="-1"><a class="header-anchor" href="#_3-2-解决方案" aria-hidden="true">#</a> 3.2 解决方案</h3><h4 id="_3-2-1-方法一" tabindex="-1"><a class="header-anchor" href="#_3-2-1-方法一" aria-hidden="true">#</a> 3.2.1 方法一</h4><p>做好参数校验，对于不合理的参数要及时 return 结束</p><p>这点非常重点，做任何业务都一样，对于后端来说，要有<strong>互不信任原则</strong>。</p><p>简单来说，就是不要信任来自前端、客户端和上游服务的请求数据，该做的校验还是要做。</p><p>因为我们永远都不知道用户会写什么奇奇怪怪的数据；又或者即使你和对接的开发约定好了要怎么传参数，但你保不准他就没遵守呢；退一步来说，万一接口被破解呢。</p><p>你要保护好自己，不然到时出问题时，你和老大说，因为谁谁不遵守约定传参导致，或者因为没想到用户会这么填，你看看你老大会这么说（狗头.jpg）</p><h4 id="_3-2-2-方法二" tabindex="-1"><a class="header-anchor" href="#_3-2-2-方法二" aria-hidden="true">#</a> 3.2.2 方法二</h4><p>对于查不到数据的 key，也将其短暂缓存起来。</p><p>比如 30s。这样能避免大量相同请求瞬间打到数据库上，减轻压力。</p><p>但是后面肯定要去看为什么会有这样的数据，从根本上解决问题，该方法只是缓解问题而已。</p><p>如果发现就是某些 ip 在请求，并且这些数据非法，那可以在网关层限制这些 ip 访问</p><h4 id="_3-2-3-方法三" tabindex="-1"><a class="header-anchor" href="#_3-2-3-方法三" aria-hidden="true">#</a> 3.2.3 方法三</h4><p>提供一个能迅速判断请求是否有效的拦截机制，比如布隆过滤器，Redis 本身就具有这个功能。</p><p>让它维护所有合法的 key，如果请求参数不合法，则直接返回。否则就从缓存或数据库中获取。</p><p>关于布隆过滤器可以看我之前写的文章：xxx</p><h2 id="_4-业务可靠性处理" tabindex="-1"><a class="header-anchor" href="#_4-业务可靠性处理" aria-hidden="true">#</a> 4. 业务可靠性处理</h2><p>如开头所说，缓存指 Redis。</p><ul><li>提高 Redis 可用性：Redis 要么用集群架构，要么用主从 + 哨兵。保证 Redis 的可用性。</li></ul><p>没有哨兵的主从不能自动故障转移，所以只有主从，万一高峰期或者在关键的活动时间节点挂了。</p><p>那么等出现线上告警、定位问题、沟通信息、等运维解决，一套操作下来，估计黄花菜都凉了。</p><ul><li>减少对缓存的依赖</li></ul><p>对于热点数据，是不是可以考虑加上本地缓存，比如：Guava、Ehcache，更简单点，hashMap、List 什么也可以。</p><p>减少对 Redis 压力的同时，还能提高性能，一举两得。</p><ul><li>业务降级</li></ul><p>从保护下游（接口或数据库）的角度考虑，针对大流量场景是不是可以做下限流。这样即使缓存崩了，也不至于把下游全部拖垮。</p><p>以及该降级的功能是不是可以降级，提前写好降级开关和降级逻辑，关键时候全靠它稳住。</p><hr><blockquote><p>作者：七淅，转载链接：<a href="https://mp.weixin.qq.com/s/juUzaf1TQYMuJFbw7Y3SXg" target="_blank" rel="noopener noreferrer">https://mp.weixin.qq.com/s/juUzaf1TQYMuJFbw7Y3SXg<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" 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clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">四、数据库</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">MySQL</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">Redis</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/redis/rumen.html" class="nav-link sidebar-link sidebar-page" aria-label="Redis入门"><!---->Redis入门<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/redis/xuebeng-chuantou-jichuan.html" 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class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/redis/xuebeng-chuantou-jichuan.html#_2-缓存击穿" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="2. 缓存击穿"><!---->2. 缓存击穿<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/redis/xuebeng-chuantou-jichuan.html#_2-1-业务场景举例" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="2.1 业务场景举例"><!---->2.1 业务场景举例<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/redis/xuebeng-chuantou-jichuan.html#_2-2-解决方案" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="2.2 解决方案"><!---->2.2 解决方案<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/redis/xuebeng-chuantou-jichuan.html#方法一" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="方法一"><!---->方法一<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/redis/xuebeng-chuantou-jichuan.html#方法二" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="方法二"><!---->方法二<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/redis/xuebeng-chuantou-jichuan.html#_3-缓存穿透" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="3. 缓存穿透"><!---->3. 缓存穿透<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/redis/xuebeng-chuantou-jichuan.html#_3-1-业务场景举例" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="3.1 业务场景举例"><!---->3.1 业务场景举例<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/redis/xuebeng-chuantou-jichuan.html#_3-2-解决方案" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="3.2 解决方案"><!---->3.2 解决方案<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/redis/xuebeng-chuantou-jichuan.html#_4-业务可靠性处理" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="4. 业务可靠性处理"><!---->4. 业务可靠性处理<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">MongoDB</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->简单聊聊缓存雪崩、穿透、击穿</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月31日</span><meta property="datePublished" content="2022-03-31T01:32:14.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" 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18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category6" role>数据库</li><meta property="articleSection" content="数据库"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 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213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 7 分钟</span><meta property="timeRequired" content="PT7M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/redis/xuebeng-chuantou-jichuan.html#_1-缓存雪崩" class="router-link-active router-link-exact-active toc-link level2">1. 缓存雪崩</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/redis/xuebeng-chuantou-jichuan.html#_1-1-业务场景举例" class="router-link-active router-link-exact-active toc-link level3">1.1 业务场景举例</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/redis/xuebeng-chuantou-jichuan.html#_1-2-解决方案" class="router-link-active router-link-exact-active toc-link level3">1.2 解决方案</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/redis/xuebeng-chuantou-jichuan.html#_2-缓存击穿" class="router-link-active router-link-exact-active toc-link level2">2. 缓存击穿</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/redis/xuebeng-chuantou-jichuan.html#_2-1-业务场景举例" class="router-link-active router-link-exact-active toc-link level3">2.1 业务场景举例</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/redis/xuebeng-chuantou-jichuan.html#_2-2-解决方案" class="router-link-active router-link-exact-active toc-link level3">2.2 解决方案</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/redis/xuebeng-chuantou-jichuan.html#方法一" class="router-link-active router-link-exact-active toc-link level3">方法一</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/redis/xuebeng-chuantou-jichuan.html#方法二" class="router-link-active router-link-exact-active toc-link level3">方法二</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/redis/xuebeng-chuantou-jichuan.html#_3-缓存穿透" class="router-link-active router-link-exact-active toc-link level2">3. 缓存穿透</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/redis/xuebeng-chuantou-jichuan.html#_3-1-业务场景举例" class="router-link-active router-link-exact-active toc-link level3">3.1 业务场景举例</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/redis/xuebeng-chuantou-jichuan.html#_3-2-解决方案" class="router-link-active router-link-exact-active toc-link level3">3.2 解决方案</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/redis/xuebeng-chuantou-jichuan.html#_4-业务可靠性处理" class="router-link-active router-link-exact-active toc-link level2">4. 业务可靠性处理</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="简单聊聊缓存雪崩、穿透、击穿" tabindex="-1"><a class="header-anchor" href="#简单聊聊缓存雪崩、穿透、击穿" aria-hidden="true">#</a> 简单聊聊缓存雪崩、穿透、击穿</h1><p>大家好，我是二哥呀。作为后端开发，我想缓存是大家再熟悉不过的东西了。</p><p>本文会介绍<strong>出现缓存雪崩、穿透和击穿的业务背景、解决方案和对业务可靠性处理</strong>。事先说明，最佳解决方案一定需要结合实际业务调整，不同业务的处理不完全相同</p><p>其实我在网上也看过不少关于缓存雪崩、穿透、击穿介绍，不知道是不是大家所做业务的不同，发现有不少小伙伴有以下疑问，比如：</p><ul><li>加随机时间过期后，如果访问时间刚好就是加了随机时间后的数据，这样岂不是白加了随机时间？</li><li>热点数据不过期，那岂不是有越来越多的脏数据？</li></ul><p>就以上问题，我都会在文中一一解释，以下说的缓存都指 Redis。</p><p>我争取把这一高频面试题讲明白，如果大家看后能在这块内容和面试官面前谈笑风生，那你就是最靓的仔。</p><p>下面，我就开始进入正题啦。</p><h2 id="_1-缓存雪崩" tabindex="-1"><a class="header-anchor" href="#_1-缓存雪崩" aria-hidden="true">#</a> 1. 缓存雪崩</h2><p>即缓存同一时间大面积的失效，这个时候来了一大波请求，都怼到数据库上，最后数据库处理不过来崩了。</p><h3 id="_1-1-业务场景举例" tabindex="-1"><a class="header-anchor" href="#_1-1-业务场景举例" aria-hidden="true">#</a> 1.1 业务场景举例</h3><p>APP 首页有大量热点数据，在某大型活动期间，针对不同时间段需要展示不同的首页数据。</p><p>比如在 0 点时需要替换新的首页数据，此时旧首页数据过期，新首页数据刚开始加载。</p><p>而 0 点正在有个小活动开始，大批请求涌入。因为新数据刚开始加载，请求多数没有命中缓存，请求到了数据库，最后就把数据库打挂了。</p><h3 id="_1-2-解决方案" tabindex="-1"><a class="header-anchor" href="#_1-2-解决方案" aria-hidden="true">#</a> 1.2 解决方案</h3><p><strong>再强调一下，所谓的解决方案是需要根据实际业务调整，不同业务的处理不完全相同</strong></p><h4 id="_1-2-1-方法一" tabindex="-1"><a class="header-anchor" href="#_1-2-1-方法一" aria-hidden="true">#</a> 1.2.1 方法一</h4><p>常见方式就是给过期时间加个随机时间。</p><p>注意这个随机时间不是几秒哈，可以长达几分钟。因为如果数据量很大，按照上述例子，加上 Redis 是单线程处理数据的。那么几秒的缓冲不一定能够保证新数据都被加载完成。</p><p>所以过期时间宁愿设置长一点，也好过短一点。反正最后都是会过期掉，最终效果是一样的。</p><p>而且过期时间范围加大，key 会更加分散，这样也是一定程度缩短 Redis 在过期 key 时候的阻塞时间。</p><p>而至于文章开头说的：「如果访问时间刚好就是加了随机时间后的数据，这样岂不是白加了随机时间」。</p><p>现在你结合上例活动的例子，它还会是一个问题吗？结合业务，一定要结合业务。</p><h4 id="_1-2-2-方法二" tabindex="-1"><a class="header-anchor" href="#_1-2-2-方法二" aria-hidden="true">#</a> 1.2.2 方法二</h4><p>加互斥锁，但这个方案会导致吞吐量明显下降。所以还是要看实际业务，像上述例子就不合适用</p><h4 id="_1-2-3-方法三" tabindex="-1"><a class="header-anchor" href="#_1-2-3-方法三" aria-hidden="true">#</a> 1.2.3 方法三</h4><p>热点数据不设置过期。不过期的话，正常业务请求自然就不会打到数据库了。</p><p>那新的问题又来了，不过期有脏数据，怎么办？</p><p>很简单，活动整体结束后再删除嘛。</p><p>那像上述例子，可以怎么处理呢？—— 选择方法一；或者提前把 0 点需要的新数据加载进 Redis，不必等到 0 点才去加载，这样也是可以的</p><h2 id="_2-缓存击穿" tabindex="-1"><a class="header-anchor" href="#_2-缓存击穿" aria-hidden="true">#</a> 2. 缓存击穿</h2><p>缓存击穿是指一个热点 key 过期或被删除后，导致线上原本能命中该热点 key 的请求，瞬间大量地打到数据库上，最终导致数据库被击垮。</p><p>有种千里之堤，溃于蚁穴的感觉。</p><h3 id="_2-1-业务场景举例" tabindex="-1"><a class="header-anchor" href="#_2-1-业务场景举例" aria-hidden="true">#</a> 2.1 业务场景举例</h3><p>出现情况一般是误操作，比如设置错了过期时间、误删除导致的。</p><blockquote><p>谁还没误操作过呢，删库跑路了解一下。反正我误删过测试库的数据，幸好人没事，狗头保命。</p></blockquote><h3 id="_2-2-解决方案" tabindex="-1"><a class="header-anchor" href="#_2-2-解决方案" aria-hidden="true">#</a> 2.2 解决方案</h3><h3 id="方法一" tabindex="-1"><a class="header-anchor" href="#方法一" aria-hidden="true">#</a> 方法一</h3><p>代码问题，该 review 的 review。</p><p>热点数据到底要不要过期，什么时候过期要明确</p><p>既然是热点数据，大概率是核心流程。那么该保证的核心功能还是需要保证的，减少犯错机会。万一出问题，那就是用户的一波输出了。</p><h3 id="方法二" tabindex="-1"><a class="header-anchor" href="#方法二" aria-hidden="true">#</a> 方法二</h3><p>线上误操作的事情，该加强权限管理的加强，特别是线上权限，一定需要审核，以防手抖。</p><h2 id="_3-缓存穿透" tabindex="-1"><a class="header-anchor" href="#_3-缓存穿透" aria-hidden="true">#</a> 3. 缓存穿透</h2><p>缓存穿透是指：客户端请求缓存和数据库中不存在的数据，导致所有的请求都打到数据库上。如果请求很多，数据库依旧会挂得明明白白。</p><h3 id="_3-1-业务场景举例" tabindex="-1"><a class="header-anchor" href="#_3-1-业务场景举例" aria-hidden="true">#</a> 3.1 业务场景举例</h3><ul><li>数据库主键 id 都是正数，然后客户端发起了 <code>id = -1</code> 的查询</li><li>一个查询接口，有一个状态字段 status，其实 0 表示开始、1 表示结束。结果有请求一直发 <code>status=3</code> 的请求过来</li></ul><h3 id="_3-2-解决方案" tabindex="-1"><a class="header-anchor" href="#_3-2-解决方案" aria-hidden="true">#</a> 3.2 解决方案</h3><h4 id="_3-2-1-方法一" tabindex="-1"><a class="header-anchor" href="#_3-2-1-方法一" aria-hidden="true">#</a> 3.2.1 方法一</h4><p>做好参数校验，对于不合理的参数要及时 return 结束</p><p>这点非常重点，做任何业务都一样，对于后端来说，要有<strong>互不信任原则</strong>。</p><p>简单来说，就是不要信任来自前端、客户端和上游服务的请求数据，该做的校验还是要做。</p><p>因为我们永远都不知道用户会写什么奇奇怪怪的数据；又或者即使你和对接的开发约定好了要怎么传参数，但你保不准他就没遵守呢；退一步来说，万一接口被破解呢。</p><p>你要保护好自己，不然到时出问题时，你和老大说，因为谁谁不遵守约定传参导致，或者因为没想到用户会这么填，你看看你老大会这么说（狗头.jpg）</p><h4 id="_3-2-2-方法二" tabindex="-1"><a class="header-anchor" href="#_3-2-2-方法二" aria-hidden="true">#</a> 3.2.2 方法二</h4><p>对于查不到数据的 key，也将其短暂缓存起来。</p><p>比如 30s。这样能避免大量相同请求瞬间打到数据库上，减轻压力。</p><p>但是后面肯定要去看为什么会有这样的数据，从根本上解决问题，该方法只是缓解问题而已。</p><p>如果发现就是某些 ip 在请求，并且这些数据非法，那可以在网关层限制这些 ip 访问</p><h4 id="_3-2-3-方法三" tabindex="-1"><a class="header-anchor" href="#_3-2-3-方法三" aria-hidden="true">#</a> 3.2.3 方法三</h4><p>提供一个能迅速判断请求是否有效的拦截机制，比如布隆过滤器，Redis 本身就具有这个功能。</p><p>让它维护所有合法的 key，如果请求参数不合法，则直接返回。否则就从缓存或数据库中获取。</p><p>关于布隆过滤器可以看我之前写的文章：xxx</p><h2 id="_4-业务可靠性处理" tabindex="-1"><a class="header-anchor" href="#_4-业务可靠性处理" aria-hidden="true">#</a> 4. 业务可靠性处理</h2><p>如开头所说，缓存指 Redis。</p><ul><li>提高 Redis 可用性：Redis 要么用集群架构，要么用主从 + 哨兵。保证 Redis 的可用性。</li></ul><p>没有哨兵的主从不能自动故障转移，所以只有主从，万一高峰期或者在关键的活动时间节点挂了。</p><p>那么等出现线上告警、定位问题、沟通信息、等运维解决，一套操作下来，估计黄花菜都凉了。</p><ul><li>减少对缓存的依赖</li></ul><p>对于热点数据，是不是可以考虑加上本地缓存，比如：Guava、Ehcache，更简单点，hashMap、List 什么也可以。</p><p>减少对 Redis 压力的同时，还能提高性能，一举两得。</p><ul><li>业务降级</li></ul><p>从保护下游（接口或数据库）的角度考虑，针对大流量场景是不是可以做下限流。这样即使缓存崩了，也不至于把下游全部拖垮。</p><p>以及该降级的功能是不是可以降级，提前写好降级开关和降级逻辑，关键时候全靠它稳住。</p><hr><blockquote><p>作者：七淅，转载链接：<a href="https://mp.weixin.qq.com/s/juUzaf1TQYMuJFbw7Y3SXg" target="_blank" rel="noopener noreferrer">https://mp.weixin.qq.com/s/juUzaf1TQYMuJFbw7Y3SXg<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 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class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/shigu/image-yasuo.html#一、图像压缩" class="router-link-active router-link-exact-active toc-link level3">一、图像压缩</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/shigu/image-yasuo.html#二、java数字图像处理" class="router-link-active router-link-exact-active toc-link level3">二、Java数字图像处理</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/shigu/image-yasuo.html#三、图像压缩实战" class="router-link-active router-link-exact-active toc-link level3">三、图像压缩实战</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/shigu/image-yasuo.html#四、其他开源库" class="router-link-active router-link-exact-active toc-link level3">四、其他开源库</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/shigu/image-yasuo.html#四、一点点心声" class="router-link-active router-link-exact-active toc-link level3">四、一点点心声</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><p>坦白从宽吧，我就是那个花了两天两夜把 1M 图片优化到 100kb 的家伙——王小二！</p><p>自从因为一篇报道登上热搜后，我差点抑郁，每天要靠 50 片安眠药才能入睡。</p><p>网络上曝光的那些关于一码通的消息，有真有假，我这里就不再澄清了。就说说我是怎么把图片从 1M 优化到 100kb 的故事吧。</p><p>是的，由于系统群体规模和访问规模的特殊性，每一行代码、每一张图片、每一个技术文档都反复核准，优化再优化，精益求精。为确保系统运行得更高效，我们将一张图片从1MB压缩到500KB，再从500KB优化到100KB。</p><p>这样的工作在外人看起来，简单到就好像悄悄给学妹塞一张情书就能让她做我女朋友一样简单。</p><p>但殊不知，这其中蕴含着极高的技术含量！</p><p>不信，我给你们普及下。</p><h3 id="一、图像压缩" tabindex="-1"><a class="header-anchor" href="#一、图像压缩" aria-hidden="true">#</a> 一、图像压缩</h3><p>图像压缩是数据压缩技术在数字图像上的应用，目的是减少图像数据中的冗余信息，从而用更加高效的格式存储和传输数据。</p><p>图像压缩可以是有损数据压缩，也可以是无损数据压缩。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/shigu/image-yasuo-1.png" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/shigu/image-yasuo-2.png" alt=""></p><p>怎么样？</p><p>是不是感觉图像压缩技术没有想象中那么简单了？</p><p>更多关于图像压缩的资料可参考以下链接。</p><blockquote><p>机器之心：https://www.jiqizhixin.com/graph/technologies/08b2b25e-21a0-48e1-9de8-f91d424adfe1</p></blockquote><h3 id="二、java数字图像处理" tabindex="-1"><a class="header-anchor" href="#二、java数字图像处理" aria-hidden="true">#</a> 二、Java数字图像处理</h3><p>作为这次“20 多万外包项目”的“主力开发人员”，我这里就给大家介绍下 Java 数字图像处理技术吧，一开始我就是用它来处理图片的。</p><p>数字图像处理（Digital Image Processing）是通过计算机对图像进行去除噪声、增强、复原、分割、提取特征等处理的方法和技术。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/shigu/image-yasuo-3.png" alt=""></p><p>输入的是图像信号，然后经过 DIP 进行有效的算法处理后，输出为数字信号。</p><p>为了压缩图像，我们需要读取图像并将其转换成 BufferedImage 对象，BufferedImage 是 Image 类的一个子类，描述了一个具有可访问的图像数据缓冲区，由 ColorModel 和 Raster 的图像数据组成。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/shigu/image-yasuo-4.png" alt=""></p><p>废话我就不多说了，直接进入实战吧！</p><h3 id="三、图像压缩实战" tabindex="-1"><a class="header-anchor" href="#三、图像压缩实战" aria-hidden="true">#</a> 三、图像压缩实战</h3><p>刚好我本地有一张之前用过的封面图，离 1M 只差 236 KB，可以拿来作为测试用。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/shigu/image-yasuo-5.png" alt=""></p><p>这其中要用到 ImageIO 类，这是一个静态类，提供了一系列方法用来读和写图像，同时还可以对图像进行简单的编码和解码。</p><p>比如说通过 <code>ImageIO.read()</code> 可以将图像读取到 BufferedImage 对象：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">File</span> input <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">File</span><span class="token punctuation">(</span><span class="token string">&quot;ceshi.jpg&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 8 分钟</span><meta property="timeRequired" content="PT8M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/shigu/image-yasuo.html#一、图像压缩" class="router-link-active router-link-exact-active toc-link level3">一、图像压缩</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/shigu/image-yasuo.html#二、java数字图像处理" class="router-link-active router-link-exact-active toc-link level3">二、Java数字图像处理</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/shigu/image-yasuo.html#三、图像压缩实战" class="router-link-active router-link-exact-active toc-link level3">三、图像压缩实战</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/shigu/image-yasuo.html#四、其他开源库" class="router-link-active router-link-exact-active toc-link level3">四、其他开源库</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/shigu/image-yasuo.html#四、一点点心声" class="router-link-active router-link-exact-active toc-link level3">四、一点点心声</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><p>坦白从宽吧，我就是那个花了两天两夜把 1M 图片优化到 100kb 的家伙——王小二！</p><p>自从因为一篇报道登上热搜后，我差点抑郁，每天要靠 50 片安眠药才能入睡。</p><p>网络上曝光的那些关于一码通的消息，有真有假，我这里就不再澄清了。就说说我是怎么把图片从 1M 优化到 100kb 的故事吧。</p><p>是的，由于系统群体规模和访问规模的特殊性，每一行代码、每一张图片、每一个技术文档都反复核准，优化再优化，精益求精。为确保系统运行得更高效，我们将一张图片从1MB压缩到500KB，再从500KB优化到100KB。</p><p>这样的工作在外人看起来，简单到就好像悄悄给学妹塞一张情书就能让她做我女朋友一样简单。</p><p>但殊不知，这其中蕴含着极高的技术含量！</p><p>不信，我给你们普及下。</p><h3 id="一、图像压缩" tabindex="-1"><a class="header-anchor" href="#一、图像压缩" aria-hidden="true">#</a> 一、图像压缩</h3><p>图像压缩是数据压缩技术在数字图像上的应用，目的是减少图像数据中的冗余信息，从而用更加高效的格式存储和传输数据。</p><p>图像压缩可以是有损数据压缩，也可以是无损数据压缩。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/shigu/image-yasuo-1.png" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/shigu/image-yasuo-2.png" alt=""></p><p>怎么样？</p><p>是不是感觉图像压缩技术没有想象中那么简单了？</p><p>更多关于图像压缩的资料可参考以下链接。</p><blockquote><p>机器之心：https://www.jiqizhixin.com/graph/technologies/08b2b25e-21a0-48e1-9de8-f91d424adfe1</p></blockquote><h3 id="二、java数字图像处理" tabindex="-1"><a class="header-anchor" href="#二、java数字图像处理" aria-hidden="true">#</a> 二、Java数字图像处理</h3><p>作为这次“20 多万外包项目”的“主力开发人员”，我这里就给大家介绍下 Java 数字图像处理技术吧，一开始我就是用它来处理图片的。</p><p>数字图像处理（Digital Image Processing）是通过计算机对图像进行去除噪声、增强、复原、分割、提取特征等处理的方法和技术。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/shigu/image-yasuo-3.png" alt=""></p><p>输入的是图像信号，然后经过 DIP 进行有效的算法处理后，输出为数字信号。</p><p>为了压缩图像，我们需要读取图像并将其转换成 BufferedImage 对象，BufferedImage 是 Image 类的一个子类，描述了一个具有可访问的图像数据缓冲区，由 ColorModel 和 Raster 的图像数据组成。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/shigu/image-yasuo-4.png" alt=""></p><p>废话我就不多说了，直接进入实战吧！</p><h3 id="三、图像压缩实战" tabindex="-1"><a class="header-anchor" href="#三、图像压缩实战" aria-hidden="true">#</a> 三、图像压缩实战</h3><p>刚好我本地有一张之前用过的封面图，离 1M 只差 236 KB，可以拿来作为测试用。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/shigu/image-yasuo-5.png" alt=""></p><p>这其中要用到 ImageIO 类，这是一个静态类，提供了一系列方法用来读和写图像，同时还可以对图像进行简单的编码和解码。</p><p>比如说通过 <code>ImageIO.read()</code> 可以将图像读取到 BufferedImage 对象：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">File</span> input <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">File</span><span class="token punctuation">(</span><span class="token string">&quot;ceshi.jpg&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 <span class="token class-name">BufferedImage</span> image <span class="token operator">=</span> <span class="token class-name">ImageIO</span><span class="token punctuation">.</span><span class="token function">read</span><span class="token punctuation">(</span>input<span class="token punctuation">)</span><span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><p>比如说通过 <code>ImageIO.getImageWritersByFormatName()</code> 可以返回一个Iterator，其中包含了通过命名格式对图像进行编码的 ImageWriter。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">Iterator</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">ImageWriter</span><span class="token punctuation">&gt;</span></span> writers <span class="token operator">=</span>  <span class="token class-name">ImageIO</span><span class="token punctuation">.</span><span class="token function">getImageWritersByFormatName</span><span class="token punctuation">(</span><span class="token string">&quot;jpg&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 <span class="token class-name">ImageWriter</span> writer <span class="token operator">=</span> <span class="token punctuation">(</span><span class="token class-name">ImageWriter</span><span class="token punctuation">)</span> writers<span class="token punctuation">.</span><span class="token function">next</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
@@ -99,6 +99,6 @@ param<span class="token punctuation">.</span><span class="token function">setCom
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><p>MatOfInt 的构造参数是一个可变参数，第一个参数 IMWRITE_JPEG_QUALITY 表示对图片的质量进行改变，第二个是质量因子，1-100，值越大表示质量越高。</p><p>执行代码后得到的图片如下所示：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/shigu/image-yasuo-12.png" alt=""></p><p>借这个机会，来对比下 OpenCV 和 JDK 原生 API 在压缩图像时所使用的时间。</p><p>这是我本机的配置情况，早年买的顶配 iMac，也是我的主力机。一开始只有 16 G 内存，后来加了一个 16 G 内存条，不过最近半年电脑突然死机重启的频率明显提高了，不知道是不是 Big Sur 这个操作系统的问题还是电脑硬件老了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/shigu/image-yasuo-13.png" alt=""></p><p>结果如下所示：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>opencvCompress压缩完成，所花时间：1070
 jdkCompress压缩完成，所花时间：322
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><p>压缩后的图片大小差不多，都是 19 KB，并且质量因子都是最低值。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/shigu/image-yasuo-14.png" alt=""></p><h3 id="四、一点点心声" tabindex="-1"><a class="header-anchor" href="#四、一点点心声" aria-hidden="true">#</a> 四、一点点心声</h3><p>经过上面的技术分析后，相信你们都明白了，把1M图片优化到100kb实在是一件“不太容易”的事情。。。。</p><p>100KB 很小了吧？只有原来的 1/10。</p><p>要知道，我可是连续加班了两天两夜，不眠不休。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/shigu/image-yasuo-15.png" alt=""></p><p>累到最后，我趴在电脑上都睡着了。</p><p>没想到哈喇子直接给电脑整短路了，我这才算是从梦里面吓醒来了！</p><p>😔，生活不易，且行且珍惜吧~</p><hr><p><strong>本篇已收录至 GitHub 上星标 1.6k+ star 的开源专栏《Java 程序员进阶之路》，据说每一个优秀的 Java 程序员都喜欢她，风趣幽默、通俗易懂。内容包括 Java 基础、Java 并发编程、Java 虚拟机、Java 企业级开发、Java 面试等核心知识点。学 Java，就认准 Java 程序员进阶之路</strong>😄。</p><p><a href="https://github.com/itwanger/toBeBetterJavaer" target="_blank" rel="noopener 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class="theme-hope-content"><p>长话短说吧。</p><p>相信大家已经被 Log4j2 的重大漏洞刷屏了，估计有不少小伙伴此时此刻已经累趴下了。很不幸，我的小老弟小二的 Spring Boot 项目中恰好用的就是 Log4j2，版本特喵的还是 2.14.1，在这次漏洞波及的版本范围之内。</p><p>第一时间从网上得知这个漏洞的消息后，小二吓尿了。赶紧跑过来问老王怎么解决。</p><p>老王先是给小二提供了一些临时性的建议，比如说：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>JVM 参数添加 -Dlog4j2.formatMsgNoLookups=true
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9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2021年12月23日</span><meta property="datePublished" content="2021-12-23T10:06:35.000Z"></span><!----><!----><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 3 分钟</span><meta property="timeRequired" content="PT3M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><p>长话短说吧。</p><p>相信大家已经被 Log4j2 的重大漏洞刷屏了，估计有不少小伙伴此时此刻已经累趴下了。很不幸，我的小老弟小二的 Spring Boot 项目中恰好用的就是 Log4j2，版本特喵的还是 2.14.1，在这次漏洞波及的版本范围之内。</p><p>第一时间从网上得知这个漏洞的消息后，小二吓尿了。赶紧跑过来问老王怎么解决。</p><p>老王先是给小二提供了一些临时性的建议，比如说：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>JVM 参数添加 -Dlog4j2.formatMsgNoLookups=true
 log4j2.formatMsgNoLookups=True
 FORMAT_MESSAGES_PATTERN_DISABLE_LOOKUPS 设置为true
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>并且老王也在时刻的关注着 Log4j2 的官网和 Spring Boot GitHub 仓库的最新消息。</p><p>Java 后端开发的小伙伴应该都知道，Log4j、SLF4J、Logback 这 3 个日志组件是一个爹——Ceki Gulcu，但 Log4j 2 却是例外，它是 Apache 基金会的产品。</p><p>所以这波超级高危漏洞的锅必须得由 Apache 来背。并且波及范围非常广，已知受影响的应用程序和组件有：</p><ul><li>Spring-boot-strater-log4j2</li><li>Apache Solr</li><li>Apache Flink</li><li>Apache Druid</li></ul><p>并且只要是在 Log4j 2.x &lt;= 2.14.1 之间的版本，都将受到影响——注定被载入史册的一波 bug 啊。</p><p>目前，Log4j2 的官网已经发布了 Log4j2 2.15.0 正式版，来解决此次漏洞。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/shigu/log4j2-01.png" alt=""></p><p>那随着 Log4j2 2.15.0 正式版的发布，Spring Boot 的 GitHub 仓库提的这些关于 Log4j2 的 issue 都已经处于关闭状态了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/shigu/log4j2-02.png" alt=""></p><p>看到这些消息后，老王紧张的情绪一下子就缓解了下来，就像吃了一颗定心丸，赶紧去通知小二不用再提心吊胆了，直接一行代码搞定。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;properties&gt;
@@ -70,6 +70,6 @@ FORMAT_MESSAGES_PATTERN_DISABLE_LOOKUPS 设置为true
     <span class="token punctuation">}</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>具体的攻击手段可以参考这里：</p><blockquote><p>https://github.com/apache/pulsar/issues/13232</p></blockquote><p>下图是程序猿阿朗画的简单的攻击链路步骤图。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/shigu/log4j2-04.png" alt=""></p><p>感兴趣的小伙伴可以在本地复现一下，但<strong>千万不要不当利用</strong>哦！</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/shigu/log4j2-05.png" alt=""></p><p>再次提醒大家一下，排查自己的项目是否引入了 Apache log4j-core Jar 包。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/shigu/log4j2-06.png" alt=""></p><p>如果存在依赖引入，且在受影响版本范围内，请升级到 Apache Log4j2 2.15.0 版本，目前已经 release。</p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/shigu/log4j2.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/12 下午4:24:21</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><!----><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/computer-base.html#数据结构" class="router-link-active router-link-exact-active toc-link level2">数据结构</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/computer-base.html#前端" class="router-link-active router-link-exact-active toc-link level2">前端</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="计算机基础" tabindex="-1"><a class="header-anchor" href="#计算机基础" aria-hidden="true">#</a> 计算机基础</h1><h2 id="数据结构" tabindex="-1"><a class="header-anchor" href="#数据结构" aria-hidden="true">#</a> 数据结构</h2><ul><li><a href="https://mp.weixin.qq.com/s/fc48Z5tSMlBHweYIS1UL0g" target="_blank" rel="noopener noreferrer">栈<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/TCg9_3cVuDfZLqK2eYrc7w" target="_blank" rel="noopener noreferrer">队列<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/BbDQPEPY6Etp9F8gQSBchw" target="_blank" rel="noopener noreferrer">霍夫曼编码<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul><h2 id="前端" tabindex="-1"><a class="header-anchor" href="#前端" aria-hidden="true">#</a> 前端</h2><ul><li><a href="https://mp.weixin.qq.com/s/BrYyhCyQwBEZOwgJZeaTOw" target="_blank" rel="noopener noreferrer">前端最努力的同学都是如何学习的？<span><svg class="external-link-icon" 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clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->计算机基础</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 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00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月9日</span><meta property="datePublished" content="2022-03-09T01:11:11.000Z"></span><!----><!----><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>小于 1 分钟</span><meta property="timeRequired" content="PT1M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/computer-base.html#数据结构" class="router-link-active router-link-exact-active toc-link level2">数据结构</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/computer-base.html#前端" class="router-link-active router-link-exact-active toc-link level2">前端</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="计算机基础" tabindex="-1"><a class="header-anchor" href="#计算机基础" aria-hidden="true">#</a> 计算机基础</h1><h2 id="数据结构" tabindex="-1"><a class="header-anchor" href="#数据结构" aria-hidden="true">#</a> 数据结构</h2><ul><li><a href="https://mp.weixin.qq.com/s/fc48Z5tSMlBHweYIS1UL0g" target="_blank" rel="noopener noreferrer">栈<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/TCg9_3cVuDfZLqK2eYrc7w" target="_blank" rel="noopener noreferrer">队列<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/BbDQPEPY6Etp9F8gQSBchw" target="_blank" rel="noopener noreferrer">霍夫曼编码<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul><h2 id="前端" tabindex="-1"><a class="header-anchor" href="#前端" aria-hidden="true">#</a> 前端</h2><ul><li><a href="https://mp.weixin.qq.com/s/BrYyhCyQwBEZOwgJZeaTOw" target="_blank" rel="noopener noreferrer">前端最努力的同学都是如何学习的？<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://mp.weixin.qq.com/s/sos0tc_pTptzQimBNSS-vg" target="_blank" rel="noopener noreferrer">前端学习资料<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/sidebar/computer-base.md" rel="noopener noreferrer" 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class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="39、为什么要有多线程复制策略？"><!---->39、为什么要有多线程复制策略？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_40、mysql-的并行策略有哪些" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="40、MySQL 的并行策略有哪些？"><!---->40、MySQL 的并行策略有哪些？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_41、mysql的一主一备和一主多从有什么区别" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="41、MySQL的一主一备和一主多从有什么区别？"><!---->41、MySQL的一主一备和一主多从有什么区别？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_42、主库出问题如何解决" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="42、主库出问题如何解决?"><!---->42、主库出问题如何解决?<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_43、mysql-读写分离涉及到过期读问题的几种解决方案" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="43、MySQL 读写分离涉及到过期读问题的几种解决方案?"><!---->43、MySQL 读写分离涉及到过期读问题的几种解决方案?<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_44、mysql的并发链接和并发查询有什么区别" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="44、MySQL的并发链接和并发查询有什么区别？"><!---->44、MySQL的并发链接和并发查询有什么区别？<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/herongwei/mysql.html#性能相关" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="性能相关"><!---->性能相关<!----></a><ul 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class="sidebar-sub-header"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_48、如何最快的复制一张表" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="48、如何最快的复制一张表？"><!---->48、如何最快的复制一张表？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_49、grant-和-flush-privileges语句" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="49、grant 和 flush privileges语句"><!---->49、grant 和 flush privileges语句<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_50、要不要使用分区表" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="50、要不要使用分区表？"><!---->50、要不要使用分区表？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_51、join-用法" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="51、join 用法"><!---->51、join 用法<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_52、mysql-有哪些自增id-各自场景是什么" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="52、MySQL 有哪些自增ID？各自场景是什么？"><!---->52、MySQL 有哪些自增ID？各自场景是什么？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_53、xid-在-mysql-内部是怎么生成的呢" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="53、Xid 在 MySQL 内部是怎么生成的呢？"><!---->53、Xid 在 MySQL 内部是怎么生成的呢？<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/herongwei/mysql.html#锁相关" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="锁相关"><!---->锁相关<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_54、说一下-mysql-的锁" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="54、说一下 MySQL 的锁"><!---->54、说一下 MySQL 的锁<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_55、什么是幻读" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="55、什么是幻读？"><!---->55、什么是幻读？<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/herongwei/mysql.html#其它为什么系列" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="其它为什么系列"><!---->其它为什么系列<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_56、为什么-mysql-会抖一下" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="56、为什么 MySQL 会抖一下？"><!---->56、为什么 MySQL 会抖一下？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_57、为什么删除了表-表文件的大小还是没变" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="57、为什么删除了表，表文件的大小还是没变？"><!---->57、为什么删除了表，表文件的大小还是没变？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_58、count-实现方式以及各种-count-对比" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="58、count(*)实现方式以及各种 count 对比"><!---->58、count(*)实现方式以及各种 count 对比<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_59、orderby-排序内部原理" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="59、orderby 排序内部原理"><!---->59、orderby 排序内部原理<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_60、如何高效的使用-mysql-显式随机消息" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="60、如何高效的使用 MySQL 显式随机消息"><!---->60、如何高效的使用 MySQL 显式随机消息<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">城市选择</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->精选数据库60道面试题必看👍</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月9日</span><meta property="datePublished" content="2022-03-09T04:47:34.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 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class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#基础" class="router-link-active router-link-exact-active toc-link level2">基础</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_1、关系型和非关系型数据库的区别" class="router-link-active router-link-exact-active toc-link level3">1、关系型和非关系型数据库的区别？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_2、详细说一下一条-mysql-语句执行的步骤" class="router-link-active router-link-exact-active toc-link level3">2、详细说一下一条 MySQL 语句执行的步骤</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#索引相关" class="router-link-active router-link-exact-active toc-link level2">索引相关</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_3、mysql-使用索引的原因" class="router-link-active router-link-exact-active toc-link level3">3、MySQL 使用索引的原因？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_4、索引的三种常见底层数据结构以及优缺点" class="router-link-active router-link-exact-active toc-link level3">4、索引的三种常见底层数据结构以及优缺点</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_5、索引的常见类型以及它是如何发挥作用的" class="router-link-active router-link-exact-active toc-link level3">5、索引的常见类型以及它是如何发挥作用的？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_6、myisam-和-innodb-实现-b-树索引方式的区别是什么" class="router-link-active router-link-exact-active toc-link level3">6、MyISAM 和 InnoDB 实现 B 树索引方式的区别是什么？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_7、innodb-为什么设计-b-树索引" class="router-link-active router-link-exact-active toc-link level3">7、InnoDB 为什么设计 B+ 树索引？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_8、什么是覆盖索引和索引下推" class="router-link-active router-link-exact-active toc-link level3">8、什么是覆盖索引和索引下推？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_9、哪些操作会导致索引失效" class="router-link-active router-link-exact-active toc-link level3">9、哪些操作会导致索引失效？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_10、字符串加索引" class="router-link-active router-link-exact-active toc-link level3">10、字符串加索引</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#日志相关" class="router-link-active router-link-exact-active toc-link level2">日志相关</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_11、mysql-的-change-buffer-是什么" class="router-link-active router-link-exact-active toc-link level3">11、MySQL 的 change buffer 是什么？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_12、mysql-是如何判断一行扫描数的" class="router-link-active router-link-exact-active toc-link level3">12、MySQL 是如何判断一行扫描数的？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_13、mysql-的-redo-log-和-binlog-区别" class="router-link-active router-link-exact-active toc-link level3">13、MySQL 的 redo log 和 binlog 区别？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_14、为什么需要-redo-log" class="router-link-active router-link-exact-active toc-link level3">14、为什么需要 redo log？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_15、为什么-redo-log-具有-crash-safe-的能力-是-binlog-无法替代的" class="router-link-active router-link-exact-active toc-link level3">15、为什么 redo log 具有 crash-safe 的能力，是 binlog 无法替代的？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_16、当数据库-crash-后-如何恢复未刷盘的数据到内存中" class="router-link-active router-link-exact-active toc-link level3">16、当数据库 crash 后，如何恢复未刷盘的数据到内存中？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_17、redo-log-写入方式" class="router-link-active router-link-exact-active toc-link level3">17、redo log 写入方式？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_18、redo-log-的执行流程" class="router-link-active router-link-exact-active toc-link level3">18、redo log 的执行流程?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_19、binlog-的概念是什么-起到什么作用-可以保证-crash-safe-吗" class="router-link-active router-link-exact-active toc-link level3">19、binlog 的概念是什么，起到什么作用， 可以保证 crash-safe 吗?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_20、什么是两阶段提交" class="router-link-active router-link-exact-active toc-link level3">20、什么是两阶段提交？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_21、mysql-怎么知道-binlog-是完整的" class="router-link-active router-link-exact-active toc-link level3">21、MySQL 怎么知道 binlog 是完整的?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_22、什么是-wal-技术-有什么优点" class="router-link-active router-link-exact-active toc-link level3">22、什么是 WAL 技术，有什么优点？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_23、binlog-日志的三种格式" class="router-link-active router-link-exact-active toc-link level3">23、binlog 日志的三种格式</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_24、redo-log日志格式" class="router-link-active router-link-exact-active toc-link level3">24、redo log日志格式</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_25、原本可以执行得很快的-sql-语句-执行速度却比预期的慢很多-原因是什么-如何解决" class="router-link-active router-link-exact-active toc-link level3">25、原本可以执行得很快的 SQL 语句，执行速度却比预期的慢很多，原因是什么？如何解决？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_26、innodb-数据页结构" class="router-link-active router-link-exact-active toc-link level3">26、InnoDB 数据页结构</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#数据相关" class="router-link-active router-link-exact-active toc-link level2">数据相关</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_27、mysql-是如何保证数据不丢失的" class="router-link-active router-link-exact-active toc-link level3">27、MySQL 是如何保证数据不丢失的？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_28、误删数据怎么办" class="router-link-active router-link-exact-active toc-link level3">28、误删数据怎么办？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_29、drop、truncate-和-delete-的区别" class="router-link-active router-link-exact-active toc-link level3">29、drop、truncate 和 delete 的区别</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_30、在-mysql-中有两个-kill-命令" class="router-link-active router-link-exact-active toc-link level3">30、在 MySQL 中有两个 kill 命令</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_31、如何理解-mysql-的边读边发" class="router-link-active router-link-exact-active toc-link level3">31、如何理解 MySQL 的边读边发</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_32、mysql-的大表查询为什么不会爆内存" class="router-link-active router-link-exact-active toc-link level3">32、MySQL 的大表查询为什么不会爆内存？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_33、mysql-临时表的用法和特性" class="router-link-active router-link-exact-active toc-link level3">33、MySQL 临时表的用法和特性</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_34、mysql-存储引擎介绍-innodb、myisam、memory" class="router-link-active router-link-exact-active toc-link level3">34、MySQL 存储引擎介绍（InnoDB、MyISAM、MEMORY）</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_35、都说-innodb-好-那还要不要使用-memory-引擎" class="router-link-active router-link-exact-active toc-link level3">35、都说 InnoDB 好，那还要不要使用 MEMORY 引擎？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_36、如果数据库误操作-如何执行数据恢复" class="router-link-active router-link-exact-active toc-link level3">36、如果数据库误操作, 如何执行数据恢复?</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#主从备份相关" class="router-link-active router-link-exact-active toc-link level2">主从备份相关</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_37、mysql-是如何保证主备同步" class="router-link-active router-link-exact-active toc-link level3">37、MySQL 是如何保证主备同步？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_38、什么是主备延迟" class="router-link-active router-link-exact-active toc-link level3">38、什么是主备延迟</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_39、为什么要有多线程复制策略" class="router-link-active router-link-exact-active toc-link level3">39、为什么要有多线程复制策略？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_40、mysql-的并行策略有哪些" class="router-link-active router-link-exact-active toc-link level3">40、MySQL 的并行策略有哪些？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_41、mysql的一主一备和一主多从有什么区别" class="router-link-active router-link-exact-active toc-link level3">41、MySQL的一主一备和一主多从有什么区别？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_42、主库出问题如何解决" class="router-link-active router-link-exact-active toc-link level3">42、主库出问题如何解决?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_43、mysql-读写分离涉及到过期读问题的几种解决方案" class="router-link-active router-link-exact-active toc-link level3">43、MySQL 读写分离涉及到过期读问题的几种解决方案?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_44、mysql的并发链接和并发查询有什么区别" class="router-link-active router-link-exact-active toc-link level3">44、MySQL的并发链接和并发查询有什么区别？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#性能相关" class="router-link-active router-link-exact-active toc-link level2">性能相关</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_45、短时间提高-mysql-性能的方法" class="router-link-active router-link-exact-active toc-link level3">45、短时间提高 MySQL 性能的方法</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_46、为什么-mysql-自增主键-id-不连续" class="router-link-active router-link-exact-active toc-link level3">46、为什么 MySQL 自增主键 ID 不连续？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_47、innodb-为什么要用自增-id-作为主键" class="router-link-active router-link-exact-active toc-link level3">47、InnoDB 为什么要用自增 ID 作为主键？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_48、如何最快的复制一张表" class="router-link-active router-link-exact-active toc-link level3">48、如何最快的复制一张表？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_49、grant-和-flush-privileges语句" class="router-link-active router-link-exact-active toc-link level3">49、grant 和 flush privileges语句</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_50、要不要使用分区表" class="router-link-active router-link-exact-active toc-link level3">50、要不要使用分区表？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_51、join-用法" class="router-link-active router-link-exact-active toc-link level3">51、join 用法</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_52、mysql-有哪些自增id-各自场景是什么" class="router-link-active router-link-exact-active toc-link level3">52、MySQL 有哪些自增ID？各自场景是什么？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_53、xid-在-mysql-内部是怎么生成的呢" class="router-link-active router-link-exact-active toc-link level3">53、Xid 在 MySQL 内部是怎么生成的呢？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#锁相关" class="router-link-active router-link-exact-active toc-link level2">锁相关</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_54、说一下-mysql-的锁" class="router-link-active router-link-exact-active toc-link level3">54、说一下 MySQL 的锁</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_55、什么是幻读" class="router-link-active router-link-exact-active toc-link level3">55、什么是幻读？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#其它为什么系列" class="router-link-active router-link-exact-active toc-link level2">其它为什么系列</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_56、为什么-mysql-会抖一下" class="router-link-active router-link-exact-active toc-link level3">56、为什么 MySQL 会抖一下？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_57、为什么删除了表-表文件的大小还是没变" class="router-link-active router-link-exact-active toc-link level3">57、为什么删除了表，表文件的大小还是没变？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_58、count-实现方式以及各种-count-对比" class="router-link-active router-link-exact-active toc-link level3">58、count(*)实现方式以及各种 count 对比</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_59、orderby-排序内部原理" class="router-link-active router-link-exact-active toc-link level3">59、orderby 排序内部原理</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_60、如何高效的使用-mysql-显式随机消息" class="router-link-active router-link-exact-active toc-link level3">60、如何高效的使用 MySQL 显式随机消息</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="精选数据库60道面试题必看" tabindex="-1"><a class="header-anchor" href="#精选数据库60道面试题必看" aria-hidden="true">#</a> 精选数据库60道面试题必看👍</h1><blockquote><p>图文详解 60 道 MySQL 面试高频题，这次吊打面试官，我觉得稳了（手动 dog）。整理：沉默王二，戳<a href="https://mp.weixin.qq.com/s/c-sy7tM0BmrqMUQFW7C65g" target="_blank" rel="noopener noreferrer">转载链接<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，里面有局详细的思维导图；作者：herongwei，戳<a href="https://mp.weixin.qq.com/s/-SqqKmhZcOlQxM-rHiIpKg" target="_blank" rel="noopener noreferrer">原文链接<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>。</p></blockquote><h2 id="基础" tabindex="-1"><a class="header-anchor" href="#基础" aria-hidden="true">#</a> 基础</h2><h3 id="_1、关系型和非关系型数据库的区别" tabindex="-1"><a class="header-anchor" href="#_1、关系型和非关系型数据库的区别" aria-hidden="true">#</a> 1、关系型和非关系型数据库的区别？</h3><p>关系型数据库的优点</p><ul><li>容易理解，因为它采用了关系模型来组织数据。</li><li>可以保持数据的一致性。</li><li>数据更新的开销比较小。</li><li>支持复杂查询（带 where 子句的查询）</li></ul><p>非关系型数据库（NOSQL）的优点</p><ul><li>无需经过 SQL 层的解析，读写效率高。</li><li>基于键值对，读写性能很高，易于扩展</li><li>可以支持多种类型数据的存储，如图片，文档等等。</li><li>扩展（可分为内存性数据库以及文档型数据库，比如 Redis，MongoDB，HBase 等，适合场景：数据量大高可用的日志系统/地理位置存储系统）。</li></ul><h3 id="_2、详细说一下一条-mysql-语句执行的步骤" tabindex="-1"><a class="header-anchor" href="#_2、详细说一下一条-mysql-语句执行的步骤" aria-hidden="true">#</a> 2、详细说一下一条 MySQL 语句执行的步骤</h3><p>Server 层按顺序执行 SQL 的步骤为：</p><ul><li>客户端请求 -&gt; 连接器（验证用户身份，给予权限）</li><li>查询缓存（存在缓存则直接返回，不存在则执行后续操作）</li><li>分析器（对 SQL 进行词法分析和语法分析操作）</li><li>优化器（主要对执行的 SQL 优化选择最优的执行方案方法）</li><li>执行器（执行时会先看用户是否有执行权限，有才去使用这个引擎提供的接口）-&gt; 去引擎层获取数据返回（如果开启查询缓存则会缓存查询结果）</li></ul><h2 id="索引相关" tabindex="-1"><a class="header-anchor" href="#索引相关" aria-hidden="true">#</a> 索引相关</h2><h3 id="_3、mysql-使用索引的原因" tabindex="-1"><a class="header-anchor" href="#_3、mysql-使用索引的原因" aria-hidden="true">#</a> 3、MySQL 使用索引的原因？</h3><p>根本原因</p><ul><li>索引的出现，就是为了提高数据查询的效率，就像书的目录一样。</li><li>对于数据库的表而言，索引其实就是它的“目录”。</li></ul><p>扩展</p><ul><li>创建唯一性索引，可以保证数据库表中每一行数据的唯一性。</li><li>帮助引擎层避免排序和临时表</li><li>将随机 IO 变为顺序 IO，加速表和表之间的连接。</li></ul><h3 id="_4、索引的三种常见底层数据结构以及优缺点" tabindex="-1"><a class="header-anchor" href="#_4、索引的三种常见底层数据结构以及优缺点" aria-hidden="true">#</a> 4、索引的三种常见底层数据结构以及优缺点</h3><p>三种常见的索引底层数据结构：分别是哈希表、有序数组和搜索树。</p><ul><li>哈希表这种适用于等值查询的场景，比如 memcached 以及其它一些 NoSQL 引擎，不适合范围查询。</li><li>有序数组索引只适用于静态存储引擎，等值和范围查询性能好，但更新数据成本高。</li><li>N 叉树由于读写上的性能优点以及适配磁盘访问模式以及广泛应用在数据库引擎中。</li><li>扩展（以 InnoDB 的一个整数字段索引为例，这个 N 差不多是 1200。棵树高是 4 的时候，就可以存 1200 的 3 次方个值，这已经 17 亿了。考虑到树根的数据块总是在内存中的，一个 10 亿行的表上一个整数字段的索引，查找一个值最多只需要访问 3 次磁盘。其实，树的第二层也有很大概率在内存中，那么访问磁盘的平均次数就更少了。）</li></ul><h3 id="_5、索引的常见类型以及它是如何发挥作用的" tabindex="-1"><a class="header-anchor" href="#_5、索引的常见类型以及它是如何发挥作用的" aria-hidden="true">#</a> 5、索引的常见类型以及它是如何发挥作用的？</h3><p>根据叶子节点的内容，索引类型分为主键索引和非主键索引。</p><ul><li>主键索引的叶子节点存的整行数据，在InnoDB里也被称为聚簇索引。</li><li>非主键索引叶子节点存的主键的值，在InnoDB里也被称为二级索引。</li></ul><h3 id="_6、myisam-和-innodb-实现-b-树索引方式的区别是什么" tabindex="-1"><a class="header-anchor" href="#_6、myisam-和-innodb-实现-b-树索引方式的区别是什么" aria-hidden="true">#</a> 6、MyISAM 和 InnoDB 实现 B 树索引方式的区别是什么？</h3><ul><li>InnoDB 存储引擎：B+ 树索引的叶子节点保存数据本身，其数据文件本身就是索引文件。</li><li>MyISAM 存储引擎：B+ 树索引的叶子节点保存数据的物理地址，叶节点的 data 域存放的是数据记录的地址，索引文件和数据文件是分离的。</li></ul><h3 id="_7、innodb-为什么设计-b-树索引" tabindex="-1"><a class="header-anchor" href="#_7、innodb-为什么设计-b-树索引" aria-hidden="true">#</a> 7、InnoDB 为什么设计 B+ 树索引？</h3><p>两个考虑因素：</p><ul><li>InnoDB 需要执行的场景和功能需要在特定查询上拥有较强的性能。</li><li>CPU 将磁盘上的数据加载到内存中需要花费大量时间。</li></ul><p>为什么选择 B+ 树：</p><ul><li><p>哈希索引虽然能提供O（1）复杂度查询，但对范围查询和排序却无法很好的支持，最终会导致全表扫描。</p></li><li><p>B 树能够在非叶子节点存储数据，但会导致在查询连续数据可能带来更多的随机 IO。</p></li><li><p>而 B+ 树的所有叶节点可以通过指针来相互连接，减少顺序遍历带来的随机 IO。</p></li><li><p>普通索引还是唯一索引？</p><p>由于唯一索引用不上 change buffer 的优化机制，因此如果业务可以接受，从性能角度出发建议你优先考虑非唯一索引。</p></li></ul><h3 id="_8、什么是覆盖索引和索引下推" tabindex="-1"><a class="header-anchor" href="#_8、什么是覆盖索引和索引下推" aria-hidden="true">#</a> 8、什么是覆盖索引和索引下推？</h3><p>覆盖索引：</p><ul><li><p>在某个查询里面，索引 k 已经“覆盖了”我们的查询需求，称为覆盖索引。</p></li><li><p>覆盖索引可以减少树的搜索次数，显著提升查询性能，所以使用覆盖索引是一个常用的性能优化手段。</p></li></ul><p>索引下推：</p><ul><li>MySQL 5.6 引入的索引下推优化（index condition pushdown)， 可以在索引遍历过程中，对索引中包含的字段先做判断，直接过滤掉不满足条件的记录，减少回表次数。</li></ul><h3 id="_9、哪些操作会导致索引失效" tabindex="-1"><a class="header-anchor" href="#_9、哪些操作会导致索引失效" aria-hidden="true">#</a> 9、哪些操作会导致索引失效？</h3><ul><li>对索引使用左或者左右模糊匹配，也就是 like %xx 或者 like %xx% 这两种方式都会造成索引失效。原因在于查询的结果可能是多个，不知道从哪个索引值开始比较，于是就只能通过全表扫描的方式来查询。</li><li>对索引进行函数/对索引进行表达式计算，因为索引保持的是索引字段的原始值，而不是经过函数计算的值，自然就没办法走索引。</li><li>对索引进行隐式转换相当于使用了新函数。</li><li>WHERE 子句中的 OR语句，只要有条件列不是索引列，就会进行全表扫描。</li></ul><h3 id="_10、字符串加索引" tabindex="-1"><a class="header-anchor" href="#_10、字符串加索引" aria-hidden="true">#</a> 10、字符串加索引</h3><ul><li>直接创建完整索引，这样可能会比较占用空间。</li><li>创建前缀索引，节省空间，但会增加查询扫描次数，并且不能使用覆盖索引。</li><li>倒序存储，再创建前缀索引，用于绕过字符串本身前缀的区分度不够的问题。</li><li>创建 hash 字段索引，查询性能稳定，有额外的存储和计算消耗，跟第三种方式一样，都不支持范围扫描。</li></ul><h2 id="日志相关" tabindex="-1"><a class="header-anchor" href="#日志相关" aria-hidden="true">#</a> 日志相关</h2><h3 id="_11、mysql-的-change-buffer-是什么" tabindex="-1"><a class="header-anchor" href="#_11、mysql-的-change-buffer-是什么" aria-hidden="true">#</a> 11、MySQL 的 change buffer 是什么？</h3><ul><li>当需要更新一个数据页时，如果数据页在内存中就直接更新；而如果这个数据页还没有在内存中的话，在不影响数据一致性的前提下，InnoDB 会将这些更新操作缓存在 change buffer 中。</li><li>这样就不需要从磁盘中读入这个数据页了，在下次查询需要访问这个数据页的时候，将数据页读入内存，然后执行 change buffer 中与这个页有关的操作。通过这种方式就能保证这个数据逻辑的正确性。</li><li>注意唯一索引的更新就不能使用 change buffer，实际上也只有普通索引可以使用。</li><li>适用场景：</li><li><ul><li>对于写多读少的业务来说，页面在写完以后马上被访问到的概率比较小，此时 change buffer 的使用效果最好。这种业务模型常见的就是账单类、日志类的系统。</li><li>反过来，假设一个业务的更新模式是写入之后马上会做查询，那么即使满足了条件，将更新先记录在 change buffer，但之后由于马上要访问这个数据页，会立即触发 merge 过程。这样随机访问 IO 的次数不会减少，反而增加了 change buffer 的维护代价。</li></ul></li></ul><h3 id="_12、mysql-是如何判断一行扫描数的" tabindex="-1"><a class="header-anchor" href="#_12、mysql-是如何判断一行扫描数的" aria-hidden="true">#</a> 12、MySQL 是如何判断一行扫描数的？</h3><ul><li>MySQL 在真正开始执行语句之前，并不能精确地知道满足这个条件的记录有多少条。</li><li>而只能根据统计信息来估算记录数。这个统计信息就是索引的“区分度。</li></ul><h3 id="_13、mysql-的-redo-log-和-binlog-区别" tabindex="-1"><a class="header-anchor" href="#_13、mysql-的-redo-log-和-binlog-区别" aria-hidden="true">#</a> 13、MySQL 的 redo log 和 binlog 区别？</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/herongwei/mysql-a2b8e123-41cb-4717-9225-3a8b49197004.png" alt=""></p><h3 id="_14、为什么需要-redo-log" tabindex="-1"><a class="header-anchor" href="#_14、为什么需要-redo-log" aria-hidden="true">#</a> 14、为什么需要 redo log？</h3><ul><li>redo log 主要用于 MySQL 异常重启后的一种数据恢复手段，确保了数据的一致性。</li><li>其实是为了配合 MySQL 的 WAL 机制。因为 MySQL 进行更新操作，为了能够快速响应，所以采用了异步写回磁盘的技术，写入内存后就返回。但是这样，会存在 <strong>crash后</strong> 内存数据丢失的隐患，而 redo log 具备 crash safe 的能力。</li></ul><h3 id="_15、为什么-redo-log-具有-crash-safe-的能力-是-binlog-无法替代的" tabindex="-1"><a class="header-anchor" href="#_15、为什么-redo-log-具有-crash-safe-的能力-是-binlog-无法替代的" aria-hidden="true">#</a> 15、为什么 redo log 具有 crash-safe 的能力，是 binlog 无法替代的？</h3><p>第一点：redo log 可确保 innoDB 判断哪些数据已经刷盘，哪些数据还没有</p><ul><li><p>redo log 和 binlog 有一个很大的区别就是，一个是循环写，一个是追加写。也就是说 redo log 只会记录未刷盘的日志，已经刷入磁盘的数据都会从 redo log 这个有限大小的日志文件里删除。binlog 是追加日志，保存的是全量的日志。</p></li><li><p>当数据库 crash 后，想要恢复<strong>未刷盘但已经写入 redo log 和 binlog 的数据</strong>到内存时，binlog 是无法恢复的。虽然 binlog 拥有全量的日志，但没有一个标志让 innoDB 判断哪些数据已经刷盘，哪些数据还没有。</p></li><li><p>但 redo log 不一样，只要刷入磁盘的数据，都会从 redo log 中抹掉，因为是循环写！数据库重启后，直接把 redo log 中的数据都恢复至内存就可以了。</p></li></ul><p>第二点：如果 redo log 写入失败，说明此次操作失败，事务也不可能提交</p><ul><li>redo log 每次更新操作完成后，就一定会写入日志，如果<strong>写入失败</strong>，说明此次操作失败，事务也不可能提交。</li><li>redo log 内部结构是基于页的，记录了这个页的字段值变化，只要crash后读取redo log进行重放，就可以恢复数据。</li><li>这就是为什么 redo log 具有 crash-safe 的能力，而 binlog 不具备。</li></ul><h3 id="_16、当数据库-crash-后-如何恢复未刷盘的数据到内存中" tabindex="-1"><a class="header-anchor" href="#_16、当数据库-crash-后-如何恢复未刷盘的数据到内存中" aria-hidden="true">#</a> 16、当数据库 crash 后，如何恢复未刷盘的数据到内存中？</h3><p>根据 redo log 和 binlog 的两阶段提交，未持久化的数据分为几种情况：</p><ul><li><p>change buffer 写入，redo log 虽然做了 fsync 但未 commit，binlog 未 fsync 到磁盘，这部分数据丢失。</p></li><li><p>change buffer 写入，redo log fsync 未 commit，binlog 已经 fsync 到磁盘，先从 binlog 恢复 redo log，再从 redo log 恢复 change buffer。</p></li><li><p>change buffer 写入，redo log 和 binlog 都已经 fsync，直接从 redo log 里恢复。</p></li></ul><h3 id="_17、redo-log-写入方式" tabindex="-1"><a class="header-anchor" href="#_17、redo-log-写入方式" aria-hidden="true">#</a> 17、redo log 写入方式？</h3><p>redo log包括两部分内容，分别是内存中的<strong>日志缓冲</strong>(redo log buffer)和磁盘上的<strong>日志文件</strong>(redo log file)。</p><p>MySQL 每执行一条 DML 语句，会先把记录写入 <strong>redo log buffer（用户空间）</strong> ，再保存到内核空间的缓冲区 OS-buffer 中，后续某个时间点再一次性将多个操作记录写到 <strong>redo log file（刷盘）</strong> 。这种先写日志，再写磁盘的技术，就是<strong>WAL</strong>。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/herongwei/mysql-f901a97f-9d82-4d4e-a5be-559a64b3d9b8.png" alt=""></p><p>可以发现，redo log buffer写入到redo log file，是经过OS buffer中转的。其实可以通过参数innodb_flush_log_at_trx_commit进行配置，参数值含义如下：</p><ul><li>0：称为<strong>延迟写</strong>，事务提交时不会将redo log buffer中日志写入到OS buffer，而是每秒写入OS buffer并调用写入到redo log file中。</li><li>1：称为<strong>实时写</strong>，实时刷”，事务每次提交都会将redo log buffer中的日志写入OS buffer并保存到redo log file中。</li><li>2： 称为<strong>实时写，延迟刷</strong>。每次事务提交写入到OS buffer，然后是每秒将日志写入到redo log file。</li></ul><h3 id="_18、redo-log-的执行流程" tabindex="-1"><a class="header-anchor" href="#_18、redo-log-的执行流程" aria-hidden="true">#</a> 18、redo log 的执行流程?</h3><p>我们来看下Redo log的执行流程，假设执行的 SQL 如下：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>update T set a =1 where id =666
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right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->精选数据库60道面试题必看👍</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 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00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月9日</span><meta property="datePublished" content="2022-03-09T04:47:34.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category6" role>数据库</li><meta property="articleSection" content="数据库"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag3" role>MySQL</li></ul><meta property="keywords" content="MySQL"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 37 分钟</span><meta property="timeRequired" content="PT37M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#基础" class="router-link-active router-link-exact-active toc-link level2">基础</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_1、关系型和非关系型数据库的区别" class="router-link-active router-link-exact-active toc-link level3">1、关系型和非关系型数据库的区别？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_2、详细说一下一条-mysql-语句执行的步骤" class="router-link-active router-link-exact-active toc-link level3">2、详细说一下一条 MySQL 语句执行的步骤</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#索引相关" class="router-link-active router-link-exact-active toc-link level2">索引相关</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_3、mysql-使用索引的原因" class="router-link-active router-link-exact-active toc-link level3">3、MySQL 使用索引的原因？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_4、索引的三种常见底层数据结构以及优缺点" class="router-link-active router-link-exact-active toc-link level3">4、索引的三种常见底层数据结构以及优缺点</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_5、索引的常见类型以及它是如何发挥作用的" class="router-link-active router-link-exact-active toc-link level3">5、索引的常见类型以及它是如何发挥作用的？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_6、myisam-和-innodb-实现-b-树索引方式的区别是什么" class="router-link-active router-link-exact-active toc-link level3">6、MyISAM 和 InnoDB 实现 B 树索引方式的区别是什么？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_7、innodb-为什么设计-b-树索引" class="router-link-active router-link-exact-active toc-link level3">7、InnoDB 为什么设计 B+ 树索引？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_8、什么是覆盖索引和索引下推" class="router-link-active router-link-exact-active toc-link level3">8、什么是覆盖索引和索引下推？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_9、哪些操作会导致索引失效" class="router-link-active router-link-exact-active toc-link level3">9、哪些操作会导致索引失效？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_10、字符串加索引" class="router-link-active router-link-exact-active toc-link level3">10、字符串加索引</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#日志相关" class="router-link-active router-link-exact-active toc-link level2">日志相关</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_11、mysql-的-change-buffer-是什么" class="router-link-active router-link-exact-active toc-link level3">11、MySQL 的 change buffer 是什么？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_12、mysql-是如何判断一行扫描数的" class="router-link-active router-link-exact-active toc-link level3">12、MySQL 是如何判断一行扫描数的？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_13、mysql-的-redo-log-和-binlog-区别" class="router-link-active router-link-exact-active toc-link level3">13、MySQL 的 redo log 和 binlog 区别？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_14、为什么需要-redo-log" class="router-link-active router-link-exact-active toc-link level3">14、为什么需要 redo log？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_15、为什么-redo-log-具有-crash-safe-的能力-是-binlog-无法替代的" class="router-link-active router-link-exact-active toc-link level3">15、为什么 redo log 具有 crash-safe 的能力，是 binlog 无法替代的？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_16、当数据库-crash-后-如何恢复未刷盘的数据到内存中" class="router-link-active router-link-exact-active toc-link level3">16、当数据库 crash 后，如何恢复未刷盘的数据到内存中？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_17、redo-log-写入方式" class="router-link-active router-link-exact-active toc-link level3">17、redo log 写入方式？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_18、redo-log-的执行流程" class="router-link-active router-link-exact-active toc-link level3">18、redo log 的执行流程?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_19、binlog-的概念是什么-起到什么作用-可以保证-crash-safe-吗" class="router-link-active router-link-exact-active toc-link level3">19、binlog 的概念是什么，起到什么作用， 可以保证 crash-safe 吗?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_20、什么是两阶段提交" class="router-link-active router-link-exact-active toc-link level3">20、什么是两阶段提交？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_21、mysql-怎么知道-binlog-是完整的" class="router-link-active router-link-exact-active toc-link level3">21、MySQL 怎么知道 binlog 是完整的?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_22、什么是-wal-技术-有什么优点" class="router-link-active router-link-exact-active toc-link level3">22、什么是 WAL 技术，有什么优点？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_23、binlog-日志的三种格式" class="router-link-active router-link-exact-active toc-link level3">23、binlog 日志的三种格式</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_24、redo-log日志格式" class="router-link-active router-link-exact-active toc-link level3">24、redo log日志格式</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_25、原本可以执行得很快的-sql-语句-执行速度却比预期的慢很多-原因是什么-如何解决" class="router-link-active router-link-exact-active toc-link level3">25、原本可以执行得很快的 SQL 语句，执行速度却比预期的慢很多，原因是什么？如何解决？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_26、innodb-数据页结构" class="router-link-active router-link-exact-active toc-link level3">26、InnoDB 数据页结构</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#数据相关" class="router-link-active router-link-exact-active toc-link level2">数据相关</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_27、mysql-是如何保证数据不丢失的" class="router-link-active router-link-exact-active toc-link level3">27、MySQL 是如何保证数据不丢失的？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_28、误删数据怎么办" class="router-link-active router-link-exact-active toc-link level3">28、误删数据怎么办？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_29、drop、truncate-和-delete-的区别" class="router-link-active router-link-exact-active toc-link level3">29、drop、truncate 和 delete 的区别</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_30、在-mysql-中有两个-kill-命令" class="router-link-active router-link-exact-active toc-link level3">30、在 MySQL 中有两个 kill 命令</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_31、如何理解-mysql-的边读边发" class="router-link-active router-link-exact-active toc-link level3">31、如何理解 MySQL 的边读边发</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_32、mysql-的大表查询为什么不会爆内存" class="router-link-active router-link-exact-active toc-link level3">32、MySQL 的大表查询为什么不会爆内存？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_33、mysql-临时表的用法和特性" class="router-link-active router-link-exact-active toc-link level3">33、MySQL 临时表的用法和特性</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_34、mysql-存储引擎介绍-innodb、myisam、memory" class="router-link-active router-link-exact-active toc-link level3">34、MySQL 存储引擎介绍（InnoDB、MyISAM、MEMORY）</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_35、都说-innodb-好-那还要不要使用-memory-引擎" class="router-link-active router-link-exact-active toc-link level3">35、都说 InnoDB 好，那还要不要使用 MEMORY 引擎？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_36、如果数据库误操作-如何执行数据恢复" class="router-link-active router-link-exact-active toc-link level3">36、如果数据库误操作, 如何执行数据恢复?</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#主从备份相关" class="router-link-active router-link-exact-active toc-link level2">主从备份相关</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_37、mysql-是如何保证主备同步" class="router-link-active router-link-exact-active toc-link level3">37、MySQL 是如何保证主备同步？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_38、什么是主备延迟" class="router-link-active router-link-exact-active toc-link level3">38、什么是主备延迟</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_39、为什么要有多线程复制策略" class="router-link-active router-link-exact-active toc-link level3">39、为什么要有多线程复制策略？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_40、mysql-的并行策略有哪些" class="router-link-active router-link-exact-active toc-link level3">40、MySQL 的并行策略有哪些？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_41、mysql的一主一备和一主多从有什么区别" class="router-link-active router-link-exact-active toc-link level3">41、MySQL的一主一备和一主多从有什么区别？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_42、主库出问题如何解决" class="router-link-active router-link-exact-active toc-link level3">42、主库出问题如何解决?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_43、mysql-读写分离涉及到过期读问题的几种解决方案" class="router-link-active router-link-exact-active toc-link level3">43、MySQL 读写分离涉及到过期读问题的几种解决方案?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_44、mysql的并发链接和并发查询有什么区别" class="router-link-active router-link-exact-active toc-link level3">44、MySQL的并发链接和并发查询有什么区别？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#性能相关" class="router-link-active router-link-exact-active toc-link level2">性能相关</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_45、短时间提高-mysql-性能的方法" class="router-link-active router-link-exact-active toc-link level3">45、短时间提高 MySQL 性能的方法</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_46、为什么-mysql-自增主键-id-不连续" class="router-link-active router-link-exact-active toc-link level3">46、为什么 MySQL 自增主键 ID 不连续？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_47、innodb-为什么要用自增-id-作为主键" class="router-link-active router-link-exact-active toc-link level3">47、InnoDB 为什么要用自增 ID 作为主键？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_48、如何最快的复制一张表" class="router-link-active router-link-exact-active toc-link level3">48、如何最快的复制一张表？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_49、grant-和-flush-privileges语句" class="router-link-active router-link-exact-active toc-link level3">49、grant 和 flush privileges语句</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_50、要不要使用分区表" class="router-link-active router-link-exact-active toc-link level3">50、要不要使用分区表？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_51、join-用法" class="router-link-active router-link-exact-active toc-link level3">51、join 用法</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_52、mysql-有哪些自增id-各自场景是什么" class="router-link-active router-link-exact-active toc-link level3">52、MySQL 有哪些自增ID？各自场景是什么？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_53、xid-在-mysql-内部是怎么生成的呢" class="router-link-active router-link-exact-active toc-link level3">53、Xid 在 MySQL 内部是怎么生成的呢？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#锁相关" class="router-link-active router-link-exact-active toc-link level2">锁相关</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_54、说一下-mysql-的锁" class="router-link-active router-link-exact-active toc-link level3">54、说一下 MySQL 的锁</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_55、什么是幻读" class="router-link-active router-link-exact-active toc-link level3">55、什么是幻读？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#其它为什么系列" class="router-link-active router-link-exact-active toc-link level2">其它为什么系列</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_56、为什么-mysql-会抖一下" class="router-link-active router-link-exact-active toc-link level3">56、为什么 MySQL 会抖一下？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_57、为什么删除了表-表文件的大小还是没变" class="router-link-active router-link-exact-active toc-link level3">57、为什么删除了表，表文件的大小还是没变？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_58、count-实现方式以及各种-count-对比" class="router-link-active router-link-exact-active toc-link level3">58、count(*)实现方式以及各种 count 对比</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_59、orderby-排序内部原理" class="router-link-active router-link-exact-active toc-link level3">59、orderby 排序内部原理</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/herongwei/mysql.html#_60、如何高效的使用-mysql-显式随机消息" class="router-link-active router-link-exact-active toc-link level3">60、如何高效的使用 MySQL 显式随机消息</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="精选数据库60道面试题必看" tabindex="-1"><a class="header-anchor" href="#精选数据库60道面试题必看" aria-hidden="true">#</a> 精选数据库60道面试题必看👍</h1><blockquote><p>图文详解 60 道 MySQL 面试高频题，这次吊打面试官，我觉得稳了（手动 dog）。整理：沉默王二，戳<a href="https://mp.weixin.qq.com/s/c-sy7tM0BmrqMUQFW7C65g" target="_blank" rel="noopener noreferrer">转载链接<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，里面有局详细的思维导图；作者：herongwei，戳<a href="https://mp.weixin.qq.com/s/-SqqKmhZcOlQxM-rHiIpKg" target="_blank" rel="noopener noreferrer">原文链接<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>。</p></blockquote><h2 id="基础" tabindex="-1"><a class="header-anchor" href="#基础" aria-hidden="true">#</a> 基础</h2><h3 id="_1、关系型和非关系型数据库的区别" tabindex="-1"><a class="header-anchor" href="#_1、关系型和非关系型数据库的区别" aria-hidden="true">#</a> 1、关系型和非关系型数据库的区别？</h3><p>关系型数据库的优点</p><ul><li>容易理解，因为它采用了关系模型来组织数据。</li><li>可以保持数据的一致性。</li><li>数据更新的开销比较小。</li><li>支持复杂查询（带 where 子句的查询）</li></ul><p>非关系型数据库（NOSQL）的优点</p><ul><li>无需经过 SQL 层的解析，读写效率高。</li><li>基于键值对，读写性能很高，易于扩展</li><li>可以支持多种类型数据的存储，如图片，文档等等。</li><li>扩展（可分为内存性数据库以及文档型数据库，比如 Redis，MongoDB，HBase 等，适合场景：数据量大高可用的日志系统/地理位置存储系统）。</li></ul><h3 id="_2、详细说一下一条-mysql-语句执行的步骤" tabindex="-1"><a class="header-anchor" href="#_2、详细说一下一条-mysql-语句执行的步骤" aria-hidden="true">#</a> 2、详细说一下一条 MySQL 语句执行的步骤</h3><p>Server 层按顺序执行 SQL 的步骤为：</p><ul><li>客户端请求 -&gt; 连接器（验证用户身份，给予权限）</li><li>查询缓存（存在缓存则直接返回，不存在则执行后续操作）</li><li>分析器（对 SQL 进行词法分析和语法分析操作）</li><li>优化器（主要对执行的 SQL 优化选择最优的执行方案方法）</li><li>执行器（执行时会先看用户是否有执行权限，有才去使用这个引擎提供的接口）-&gt; 去引擎层获取数据返回（如果开启查询缓存则会缓存查询结果）</li></ul><h2 id="索引相关" tabindex="-1"><a class="header-anchor" href="#索引相关" aria-hidden="true">#</a> 索引相关</h2><h3 id="_3、mysql-使用索引的原因" tabindex="-1"><a class="header-anchor" href="#_3、mysql-使用索引的原因" aria-hidden="true">#</a> 3、MySQL 使用索引的原因？</h3><p>根本原因</p><ul><li>索引的出现，就是为了提高数据查询的效率，就像书的目录一样。</li><li>对于数据库的表而言，索引其实就是它的“目录”。</li></ul><p>扩展</p><ul><li>创建唯一性索引，可以保证数据库表中每一行数据的唯一性。</li><li>帮助引擎层避免排序和临时表</li><li>将随机 IO 变为顺序 IO，加速表和表之间的连接。</li></ul><h3 id="_4、索引的三种常见底层数据结构以及优缺点" tabindex="-1"><a class="header-anchor" href="#_4、索引的三种常见底层数据结构以及优缺点" aria-hidden="true">#</a> 4、索引的三种常见底层数据结构以及优缺点</h3><p>三种常见的索引底层数据结构：分别是哈希表、有序数组和搜索树。</p><ul><li>哈希表这种适用于等值查询的场景，比如 memcached 以及其它一些 NoSQL 引擎，不适合范围查询。</li><li>有序数组索引只适用于静态存储引擎，等值和范围查询性能好，但更新数据成本高。</li><li>N 叉树由于读写上的性能优点以及适配磁盘访问模式以及广泛应用在数据库引擎中。</li><li>扩展（以 InnoDB 的一个整数字段索引为例，这个 N 差不多是 1200。棵树高是 4 的时候，就可以存 1200 的 3 次方个值，这已经 17 亿了。考虑到树根的数据块总是在内存中的，一个 10 亿行的表上一个整数字段的索引，查找一个值最多只需要访问 3 次磁盘。其实，树的第二层也有很大概率在内存中，那么访问磁盘的平均次数就更少了。）</li></ul><h3 id="_5、索引的常见类型以及它是如何发挥作用的" tabindex="-1"><a class="header-anchor" href="#_5、索引的常见类型以及它是如何发挥作用的" aria-hidden="true">#</a> 5、索引的常见类型以及它是如何发挥作用的？</h3><p>根据叶子节点的内容，索引类型分为主键索引和非主键索引。</p><ul><li>主键索引的叶子节点存的整行数据，在InnoDB里也被称为聚簇索引。</li><li>非主键索引叶子节点存的主键的值，在InnoDB里也被称为二级索引。</li></ul><h3 id="_6、myisam-和-innodb-实现-b-树索引方式的区别是什么" tabindex="-1"><a class="header-anchor" href="#_6、myisam-和-innodb-实现-b-树索引方式的区别是什么" aria-hidden="true">#</a> 6、MyISAM 和 InnoDB 实现 B 树索引方式的区别是什么？</h3><ul><li>InnoDB 存储引擎：B+ 树索引的叶子节点保存数据本身，其数据文件本身就是索引文件。</li><li>MyISAM 存储引擎：B+ 树索引的叶子节点保存数据的物理地址，叶节点的 data 域存放的是数据记录的地址，索引文件和数据文件是分离的。</li></ul><h3 id="_7、innodb-为什么设计-b-树索引" tabindex="-1"><a class="header-anchor" href="#_7、innodb-为什么设计-b-树索引" aria-hidden="true">#</a> 7、InnoDB 为什么设计 B+ 树索引？</h3><p>两个考虑因素：</p><ul><li>InnoDB 需要执行的场景和功能需要在特定查询上拥有较强的性能。</li><li>CPU 将磁盘上的数据加载到内存中需要花费大量时间。</li></ul><p>为什么选择 B+ 树：</p><ul><li><p>哈希索引虽然能提供O（1）复杂度查询，但对范围查询和排序却无法很好的支持，最终会导致全表扫描。</p></li><li><p>B 树能够在非叶子节点存储数据，但会导致在查询连续数据可能带来更多的随机 IO。</p></li><li><p>而 B+ 树的所有叶节点可以通过指针来相互连接，减少顺序遍历带来的随机 IO。</p></li><li><p>普通索引还是唯一索引？</p><p>由于唯一索引用不上 change buffer 的优化机制，因此如果业务可以接受，从性能角度出发建议你优先考虑非唯一索引。</p></li></ul><h3 id="_8、什么是覆盖索引和索引下推" tabindex="-1"><a class="header-anchor" href="#_8、什么是覆盖索引和索引下推" aria-hidden="true">#</a> 8、什么是覆盖索引和索引下推？</h3><p>覆盖索引：</p><ul><li><p>在某个查询里面，索引 k 已经“覆盖了”我们的查询需求，称为覆盖索引。</p></li><li><p>覆盖索引可以减少树的搜索次数，显著提升查询性能，所以使用覆盖索引是一个常用的性能优化手段。</p></li></ul><p>索引下推：</p><ul><li>MySQL 5.6 引入的索引下推优化（index condition pushdown)， 可以在索引遍历过程中，对索引中包含的字段先做判断，直接过滤掉不满足条件的记录，减少回表次数。</li></ul><h3 id="_9、哪些操作会导致索引失效" tabindex="-1"><a class="header-anchor" href="#_9、哪些操作会导致索引失效" aria-hidden="true">#</a> 9、哪些操作会导致索引失效？</h3><ul><li>对索引使用左或者左右模糊匹配，也就是 like %xx 或者 like %xx% 这两种方式都会造成索引失效。原因在于查询的结果可能是多个，不知道从哪个索引值开始比较，于是就只能通过全表扫描的方式来查询。</li><li>对索引进行函数/对索引进行表达式计算，因为索引保持的是索引字段的原始值，而不是经过函数计算的值，自然就没办法走索引。</li><li>对索引进行隐式转换相当于使用了新函数。</li><li>WHERE 子句中的 OR语句，只要有条件列不是索引列，就会进行全表扫描。</li></ul><h3 id="_10、字符串加索引" tabindex="-1"><a class="header-anchor" href="#_10、字符串加索引" aria-hidden="true">#</a> 10、字符串加索引</h3><ul><li>直接创建完整索引，这样可能会比较占用空间。</li><li>创建前缀索引，节省空间，但会增加查询扫描次数，并且不能使用覆盖索引。</li><li>倒序存储，再创建前缀索引，用于绕过字符串本身前缀的区分度不够的问题。</li><li>创建 hash 字段索引，查询性能稳定，有额外的存储和计算消耗，跟第三种方式一样，都不支持范围扫描。</li></ul><h2 id="日志相关" tabindex="-1"><a class="header-anchor" href="#日志相关" aria-hidden="true">#</a> 日志相关</h2><h3 id="_11、mysql-的-change-buffer-是什么" tabindex="-1"><a class="header-anchor" href="#_11、mysql-的-change-buffer-是什么" aria-hidden="true">#</a> 11、MySQL 的 change buffer 是什么？</h3><ul><li>当需要更新一个数据页时，如果数据页在内存中就直接更新；而如果这个数据页还没有在内存中的话，在不影响数据一致性的前提下，InnoDB 会将这些更新操作缓存在 change buffer 中。</li><li>这样就不需要从磁盘中读入这个数据页了，在下次查询需要访问这个数据页的时候，将数据页读入内存，然后执行 change buffer 中与这个页有关的操作。通过这种方式就能保证这个数据逻辑的正确性。</li><li>注意唯一索引的更新就不能使用 change buffer，实际上也只有普通索引可以使用。</li><li>适用场景：</li><li><ul><li>对于写多读少的业务来说，页面在写完以后马上被访问到的概率比较小，此时 change buffer 的使用效果最好。这种业务模型常见的就是账单类、日志类的系统。</li><li>反过来，假设一个业务的更新模式是写入之后马上会做查询，那么即使满足了条件，将更新先记录在 change buffer，但之后由于马上要访问这个数据页，会立即触发 merge 过程。这样随机访问 IO 的次数不会减少，反而增加了 change buffer 的维护代价。</li></ul></li></ul><h3 id="_12、mysql-是如何判断一行扫描数的" tabindex="-1"><a class="header-anchor" href="#_12、mysql-是如何判断一行扫描数的" aria-hidden="true">#</a> 12、MySQL 是如何判断一行扫描数的？</h3><ul><li>MySQL 在真正开始执行语句之前，并不能精确地知道满足这个条件的记录有多少条。</li><li>而只能根据统计信息来估算记录数。这个统计信息就是索引的“区分度。</li></ul><h3 id="_13、mysql-的-redo-log-和-binlog-区别" tabindex="-1"><a class="header-anchor" href="#_13、mysql-的-redo-log-和-binlog-区别" aria-hidden="true">#</a> 13、MySQL 的 redo log 和 binlog 区别？</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/herongwei/mysql-a2b8e123-41cb-4717-9225-3a8b49197004.png" alt=""></p><h3 id="_14、为什么需要-redo-log" tabindex="-1"><a class="header-anchor" href="#_14、为什么需要-redo-log" aria-hidden="true">#</a> 14、为什么需要 redo log？</h3><ul><li>redo log 主要用于 MySQL 异常重启后的一种数据恢复手段，确保了数据的一致性。</li><li>其实是为了配合 MySQL 的 WAL 机制。因为 MySQL 进行更新操作，为了能够快速响应，所以采用了异步写回磁盘的技术，写入内存后就返回。但是这样，会存在 <strong>crash后</strong> 内存数据丢失的隐患，而 redo log 具备 crash safe 的能力。</li></ul><h3 id="_15、为什么-redo-log-具有-crash-safe-的能力-是-binlog-无法替代的" tabindex="-1"><a class="header-anchor" href="#_15、为什么-redo-log-具有-crash-safe-的能力-是-binlog-无法替代的" aria-hidden="true">#</a> 15、为什么 redo log 具有 crash-safe 的能力，是 binlog 无法替代的？</h3><p>第一点：redo log 可确保 innoDB 判断哪些数据已经刷盘，哪些数据还没有</p><ul><li><p>redo log 和 binlog 有一个很大的区别就是，一个是循环写，一个是追加写。也就是说 redo log 只会记录未刷盘的日志，已经刷入磁盘的数据都会从 redo log 这个有限大小的日志文件里删除。binlog 是追加日志，保存的是全量的日志。</p></li><li><p>当数据库 crash 后，想要恢复<strong>未刷盘但已经写入 redo log 和 binlog 的数据</strong>到内存时，binlog 是无法恢复的。虽然 binlog 拥有全量的日志，但没有一个标志让 innoDB 判断哪些数据已经刷盘，哪些数据还没有。</p></li><li><p>但 redo log 不一样，只要刷入磁盘的数据，都会从 redo log 中抹掉，因为是循环写！数据库重启后，直接把 redo log 中的数据都恢复至内存就可以了。</p></li></ul><p>第二点：如果 redo log 写入失败，说明此次操作失败，事务也不可能提交</p><ul><li>redo log 每次更新操作完成后，就一定会写入日志，如果<strong>写入失败</strong>，说明此次操作失败，事务也不可能提交。</li><li>redo log 内部结构是基于页的，记录了这个页的字段值变化，只要crash后读取redo log进行重放，就可以恢复数据。</li><li>这就是为什么 redo log 具有 crash-safe 的能力，而 binlog 不具备。</li></ul><h3 id="_16、当数据库-crash-后-如何恢复未刷盘的数据到内存中" tabindex="-1"><a class="header-anchor" href="#_16、当数据库-crash-后-如何恢复未刷盘的数据到内存中" aria-hidden="true">#</a> 16、当数据库 crash 后，如何恢复未刷盘的数据到内存中？</h3><p>根据 redo log 和 binlog 的两阶段提交，未持久化的数据分为几种情况：</p><ul><li><p>change buffer 写入，redo log 虽然做了 fsync 但未 commit，binlog 未 fsync 到磁盘，这部分数据丢失。</p></li><li><p>change buffer 写入，redo log fsync 未 commit，binlog 已经 fsync 到磁盘，先从 binlog 恢复 redo log，再从 redo log 恢复 change buffer。</p></li><li><p>change buffer 写入，redo log 和 binlog 都已经 fsync，直接从 redo log 里恢复。</p></li></ul><h3 id="_17、redo-log-写入方式" tabindex="-1"><a class="header-anchor" href="#_17、redo-log-写入方式" aria-hidden="true">#</a> 17、redo log 写入方式？</h3><p>redo log包括两部分内容，分别是内存中的<strong>日志缓冲</strong>(redo log buffer)和磁盘上的<strong>日志文件</strong>(redo log file)。</p><p>MySQL 每执行一条 DML 语句，会先把记录写入 <strong>redo log buffer（用户空间）</strong> ，再保存到内核空间的缓冲区 OS-buffer 中，后续某个时间点再一次性将多个操作记录写到 <strong>redo log file（刷盘）</strong> 。这种先写日志，再写磁盘的技术，就是<strong>WAL</strong>。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/herongwei/mysql-f901a97f-9d82-4d4e-a5be-559a64b3d9b8.png" alt=""></p><p>可以发现，redo log buffer写入到redo log file，是经过OS buffer中转的。其实可以通过参数innodb_flush_log_at_trx_commit进行配置，参数值含义如下：</p><ul><li>0：称为<strong>延迟写</strong>，事务提交时不会将redo log buffer中日志写入到OS buffer，而是每秒写入OS buffer并调用写入到redo log file中。</li><li>1：称为<strong>实时写</strong>，实时刷”，事务每次提交都会将redo log buffer中的日志写入OS buffer并保存到redo log file中。</li><li>2： 称为<strong>实时写，延迟刷</strong>。每次事务提交写入到OS buffer，然后是每秒将日志写入到redo log file。</li></ul><h3 id="_18、redo-log-的执行流程" tabindex="-1"><a class="header-anchor" href="#_18、redo-log-的执行流程" aria-hidden="true">#</a> 18、redo log 的执行流程?</h3><p>我们来看下Redo log的执行流程，假设执行的 SQL 如下：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>update T set a =1 where id =666
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/herongwei/mysql-43fe6587-0cb8-49aa-bd93-0119e46430d7.png" alt=""></p><ol><li>MySQL 客户端将请求语句 update T set a =1 where id =666，发往 MySQL Server 层。</li><li>MySQL Server 层接收到 SQL 请求后，对其进行分析、优化、执行等处理工作，将生成的 SQL 执行计划发到 InnoDB 存储引擎层执行。</li><li>InnoDB 存储引擎层将<strong>a修改为1</strong>的这个操作记录到内存中。</li><li>记录到内存以后会修改 redo log 的记录，会在添加一行记录，其内容是<strong>需要在哪个数据页上做什么修改</strong>。</li><li>此后，将事务的状态设置为 prepare ，说明已经准备好提交事务了。</li><li>等到 MySQL Server 层处理完事务以后，会将事务的状态设置为 <strong>commit</strong>，也就是提交该事务。</li><li>在收到事务提交的请求以后，<strong>redo log</strong> 会把刚才写入内存中的操作记录写入到磁盘中，从而完成整个日志的记录过程。</li></ol><h3 id="_19、binlog-的概念是什么-起到什么作用-可以保证-crash-safe-吗" tabindex="-1"><a class="header-anchor" href="#_19、binlog-的概念是什么-起到什么作用-可以保证-crash-safe-吗" aria-hidden="true">#</a> 19、binlog 的概念是什么，起到什么作用， 可以保证 crash-safe 吗?</h3><ul><li>binlog 是归档日志，属于 MySQL Server 层的日志。可以实现<strong>主从复制</strong>和<strong>数据恢复</strong>两个作用。</li><li>当需要<strong>恢复数据</strong>时，可以取出某个时间范围内的 binlog 进行重放恢复。</li><li>但是 binlog 不可以做 crash safe，因为 crash 之前，binlog <strong>可能没有写入完全</strong> MySQL 就挂了。所以需要配合 <strong>redo log</strong> 才可以进行 crash safe。</li></ul><h3 id="_20、什么是两阶段提交" tabindex="-1"><a class="header-anchor" href="#_20、什么是两阶段提交" aria-hidden="true">#</a> 20、什么是两阶段提交？</h3><p>MySQL 将 redo log 的写入拆成了两个步骤：prepare 和 commit，中间再穿插写入binlog，这就是&quot;两阶段提交&quot;。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/herongwei/mysql-11420486-f9d0-483a-ba2e-a742ec4c518d.png" alt=""></p><p>而两阶段提交就是让这两个状态保持逻辑上的一致。redolog 用于恢复主机故障时的未更新的物理数据，binlog 用于备份操作。两者本身就是两个独立的个体，要想保持一致，就必须使用分布式事务的解决方案来处理。</p><p><strong>为什么需要两阶段提交呢?</strong></p><ul><li>如果不用两阶段提交的话，可能会出现这样情况</li><li>先写 redo log，crash 后 bin log 备份恢复时少了一次更新，与当前数据不一致。</li><li>先写 bin log，crash 后，由于 redo log 没写入，事务无效，所以后续 bin log 备份恢复时，数据不一致。</li><li>两阶段提交就是为了保证 redo log 和 binlog 数据的安全一致性。只有在这两个日志文件逻辑上高度一致了才能放心的使用。</li></ul><p>在恢复数据时，redolog 状态为 commit 则说明 binlog 也成功，直接恢复数据；如果 redolog 是 prepare，则需要查询对应的 binlog事务是否成功，决定是回滚还是执行。</p><h3 id="_21、mysql-怎么知道-binlog-是完整的" tabindex="-1"><a class="header-anchor" href="#_21、mysql-怎么知道-binlog-是完整的" aria-hidden="true">#</a> 21、MySQL 怎么知道 binlog 是完整的?</h3><p>一个事务的 binlog 是有完整格式的：</p><ul><li>statement 格式的 binlog，最后会有 COMMIT；</li><li>row 格式的 binlog，最后会有一个 XID event。</li></ul><h3 id="_22、什么是-wal-技术-有什么优点" tabindex="-1"><a class="header-anchor" href="#_22、什么是-wal-技术-有什么优点" aria-hidden="true">#</a> 22、什么是 WAL 技术，有什么优点？</h3><p>WAL，中文全称是 Write-Ahead Logging，它的关键点就是日志先写内存，再写磁盘。MySQL 执行更新操作后，<strong>在真正把数据写入到磁盘前，先记录日志</strong>。</p><p>好处是不用每一次操作都实时把数据写盘，就算 crash 后也可以通过redo log 恢复，所以能够实现快速响应 SQL 语句。</p><h3 id="_23、binlog-日志的三种格式" tabindex="-1"><a class="header-anchor" href="#_23、binlog-日志的三种格式" aria-hidden="true">#</a> 23、binlog 日志的三种格式</h3><p>binlog 日志有三种格式</p><ul><li>Statement：基于SQL语句的复制((statement-based replication,SBR))</li><li>Row：基于行的复制。(row-based replication,RBR)</li><li>Mixed：混合模式复制。(mixed-based replication,MBR)</li></ul><p><strong>Statement格式</strong></p><p>每一条会修改数据的 SQL 都会记录在 binlog 中</p><ul><li>优点：不需要记录每一行的变化，减少了binlog日志量，节约了IO，提高性能。</li><li>缺点：由于记录的只是执行语句，为了这些语句能在备库上正确运行，还必须记录每条语句在执行的时候的一些相关信息，以保证所有语句能在备库得到和在主库端执行时候相同的结果。</li></ul><p><strong>Row格式</strong></p><p>不记录 SQL 语句上下文相关信息，仅保存哪条记录被修改。</p><ul><li>优点：binlog 中可以不记录执行的 SQL 语句的上下文相关的信息，仅需要记录那一条记录被修改成什么了。所以rowlevel的日志内容会非常清楚的记录下每一行数据修改的细节。不会出现某些特定情况下的存储过程、或 function、或trigger的调用和触发无法被正确复制的问题。</li><li>缺点:可能会产生大量的日志内容。</li></ul><p><strong>Mixed格式</strong></p><p>实际上就是 Statement 与 Row 的结合。一般的语句修改使用 statment 格式保存 binlog，如一些函数，statement 无法完成主从复制的操作，则采用 row 格式保存 binlog，MySQL 会根据执行的每一条具体的 SQL 语句来区分对待记录的日志形式。</p><h3 id="_24、redo-log日志格式" tabindex="-1"><a class="header-anchor" href="#_24、redo-log日志格式" aria-hidden="true">#</a> 24、redo log日志格式</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/herongwei/mysql-ee8a859f-d1e8-4ab6-94d1-9733373be825.png" alt=""></p><p>redo log buffer (内存中)是由首尾相连的四个文件组成的，它们分别是：ib_logfile_1、ib_logfile_2、ib_logfile_3、ib_logfile_4。</p><ul><li>write pos 是当前记录的位置，一边写一边后移，写到第 3 号文件末尾后就回到 0 号文件开头。</li><li>checkpoint 是当前要擦除的位置，也是往后推移并且循环的，擦除记录前要把记录更新到数据文件。</li><li>write pos 和 checkpoint 之间的是“粉板”上还空着的部分，可以用来记录新的操作。</li><li>如果 write pos 追上 checkpoint，表示“粉板”满了，这时候不能再执行新的更新，得停下来先擦掉一些记录，把 checkpoint 推进一下。</li><li>有了 redo log，当数据库发生宕机重启后，可通过 redo log将未落盘的数据（check point之后的数据）恢复，保证已经提交的事务记录不会丢失，这种能力称为<strong>crash-safe</strong>。</li></ul><h3 id="_25、原本可以执行得很快的-sql-语句-执行速度却比预期的慢很多-原因是什么-如何解决" tabindex="-1"><a class="header-anchor" href="#_25、原本可以执行得很快的-sql-语句-执行速度却比预期的慢很多-原因是什么-如何解决" aria-hidden="true">#</a> 25、原本可以执行得很快的 SQL 语句，执行速度却比预期的慢很多，原因是什么？如何解决？</h3><p>原因：从大到小可分为四种情况</p><ul><li>MySQL 数据库本身被堵住了，比如：系统或网络资源不够。</li><li>SQL 语句被堵住了，比如：表锁，行锁等，导致存储引擎不执行对应的 SQL 语句。</li><li>确实是索引使用不当，没有走索引。</li><li>表中数据的特点导致的，走了索引，但回表次数庞大。</li></ul><p>解决：</p><ul><li>考虑采用 force index 强行选择一个索引</li><li>考虑修改语句，引导 MySQL 使用我们期望的索引。比如把“order by b limit 1” 改成 “order by b,a limit 1” ，语义的逻辑是相同的。</li><li>第三种方法是，在有些场景下，可以新建一个更合适的索引，来提供给优化器做选择，或删掉误用的索引。</li><li>如果确定是索引根本没必要，可以考虑删除索引。</li></ul><h3 id="_26、innodb-数据页结构" tabindex="-1"><a class="header-anchor" href="#_26、innodb-数据页结构" aria-hidden="true">#</a> 26、InnoDB 数据页结构</h3><p>一个数据页大致划分七个部分</p><ul><li>File Header：表示页的一些通用信息，占固定的38字节。</li><li>page Header：表示数据页专有信息，占固定的56字节。</li><li>inimum+Supermum：两个虚拟的伪记录，分别表示页中的最小记录和最大记录，占固定的26字节。</li><li>User Records：真正存储我们插入的数据，大小不固定。</li><li>Free Space：页中尚未使用的部分，大小不固定。</li><li>Page Directory：页中某些记录的相对位置，也就是各个槽对应的记录在页面中的地址偏移量。</li><li>File Trailer：用于检验页是否完整，占固定大小 8 字节。</li></ul><h2 id="数据相关" tabindex="-1"><a class="header-anchor" href="#数据相关" aria-hidden="true">#</a> 数据相关</h2><h3 id="_27、mysql-是如何保证数据不丢失的" tabindex="-1"><a class="header-anchor" href="#_27、mysql-是如何保证数据不丢失的" aria-hidden="true">#</a> 27、MySQL 是如何保证数据不丢失的？</h3><ul><li>只要redolog 和 binlog 保证持久化磁盘就能确保MySQL异常重启后回复数据</li><li>在恢复数据时，redolog 状态为 commit 则说明 binlog 也成功，直接恢复数据；如果 redolog 是 prepare，则需要查询对应的 binlog事务是否成功，决定是回滚还是执行。</li></ul><h3 id="_28、误删数据怎么办" tabindex="-1"><a class="header-anchor" href="#_28、误删数据怎么办" aria-hidden="true">#</a> 28、误删数据怎么办？</h3><p>DBA 的最核心的工作就是保证数据的完整性，先要做好预防，预防的话大概是通过这几个点：</p><ul><li>权限控制与分配(数据库和服务器权限)</li><li>制作操作规范</li><li>定期给开发进行培训</li><li>搭建延迟备库</li><li>做好 SQL 审计，只要是对线上数据有更改操作的语句(DML和DDL)都需要进行审核</li><li>做好备份。备份的话又分为两个点 (1)如果数据量比较大，用物理备份 xtrabackup。定期对数据库进行全量备份，也可以做增量备份。 (2)如果数据量较少，用 mysqldump 或者 mysqldumper。再利用 binlog 来恢复或者搭建主从的方式来恢复数据。 定期备份binlog 文件也是很有必要的</li><li>如果发生了数据删除的操作，又可以从以下几个点来恢复:</li><li>DML 误操作语句造成数据不完整或者丢失。可以通过 flashback，美团的 myflash，也是一个不错的工具，本质都差不多，都是先解析 binlog event，然后在进行反转。把 delete 反转为insert，insert 反转为 delete，update前后 image 对调。所以必须设置binlog_format=row 和 binlog_row_image=full，切记恢复数据的时候，应该先恢复到临时的实例，然后在恢复回主库上。</li><li>DDL语句误操作(truncate和drop)，由于DDL语句不管 binlog_format 是 row 还是 statement ，在 binlog 里都只记录语句，不记录 image 所以恢复起来相对要麻烦得多。只能通过全量备份+应用 binlog 的方式来恢复数据。一旦数据量比较大，那么恢复时间就特别长</li><li>rm 删除：使用备份跨机房，或者最好是跨城市保存。</li></ul><h3 id="_29、drop、truncate-和-delete-的区别" tabindex="-1"><a class="header-anchor" href="#_29、drop、truncate-和-delete-的区别" aria-hidden="true">#</a> 29、drop、truncate 和 delete 的区别</h3><ul><li>DELETE 语句执行删除的过程是每次从表中删除一行，并且同时将该行的删除操作作为事务记录在日志中保存以便进行进行回滚操作。</li><li>TRUNCATE TABLE 则一次性地从表中删除所有的数据并不把单独的删除操作记录记入日志保存，删除行是不能恢复的。并且在删除的过程中不会激活与表有关的删除触发器。执行速度快。</li><li>drop语句将表所占用的空间全释放掉。</li><li>在速度上，一般来说，drop&gt; truncate &gt; delete。</li><li>如果想删除部分数据用 delete，注意带上 where 子句，回滚段要足够大；</li><li>如果想删除表，当然用 drop； 如果想保留表而将所有数据删除，如果和事务无关，用 truncate 即可；</li><li>如果和事务有关，或者想触发 trigger，还是用 delete； 如果是整理表内部的碎片，可以用 truncate 跟上 reuse stroage，再重新导入/插入数据。</li></ul><h3 id="_30、在-mysql-中有两个-kill-命令" tabindex="-1"><a class="header-anchor" href="#_30、在-mysql-中有两个-kill-命令" aria-hidden="true">#</a> 30、在 MySQL 中有两个 kill 命令</h3><ul><li>一个是 kill query + 线程 id，表示终止这个线程中正在执行的语句</li><li>一个是 kill connection + 线程 id，这里 connection 可缺省，表示断开这个线程的连接</li></ul><p>kill 不掉的原因</p><ul><li>kill命令被堵了，还没到位</li><li>kill命令到位了，但是没被立刻触发</li><li>kill命令被触发了，但执行完也需要时间</li></ul><h3 id="_31、如何理解-mysql-的边读边发" tabindex="-1"><a class="header-anchor" href="#_31、如何理解-mysql-的边读边发" aria-hidden="true">#</a> 31、如何理解 MySQL 的边读边发</h3><ul><li>如果客户端接受慢，会导致 MySQL 服务端由于结果发不出去，这个事务的执行时间会很长。</li><li>服务端并不需要保存一个完整的结果集，取数据和发数据的流程都是通过一个 next_buffer 来操作的。</li><li>内存的数据页都是在 Buffer_Pool中操作的。</li><li>InnoDB 管理 Buffer_Pool 使用的是改进的 LRU 算法，使用链表实现，实现上，按照 5:3 的比例把整个 LRU 链表分成了 young 区域和 old 区域。</li></ul><h3 id="_32、mysql-的大表查询为什么不会爆内存" tabindex="-1"><a class="header-anchor" href="#_32、mysql-的大表查询为什么不会爆内存" aria-hidden="true">#</a> 32、MySQL 的大表查询为什么不会爆内存？</h3><ul><li>由于 MySQL 是边读变发，因此对于数据量很大的查询结果来说，不会再 server 端保存完整的结果集，所以，如果客户端读结果不及时，会堵住 MySQL 的查询过程，但是不会把内存打爆。</li><li>InnoDB 引擎内部，由于有淘汰策略，InnoDB 管理 Buffer_Pool 使用的是改进的 LRU 算法，使用链表实现，实现上，按照 5:3 的比例把整个 LRU 链表分成了 young 区域和 old 区域。对冷数据的全扫描，影响也能做到可控制。</li></ul><h3 id="_33、mysql-临时表的用法和特性" tabindex="-1"><a class="header-anchor" href="#_33、mysql-临时表的用法和特性" aria-hidden="true">#</a> 33、MySQL 临时表的用法和特性</h3><ul><li>只对当前session可见。</li><li>可以与普通表重名。</li><li>增删改查用的是临时表。</li><li>show tables 不显示普通表。</li><li>在实际应用中，临时表一般用于处理比较复杂的计算逻辑。</li><li>由于临时表是每个线程自己可见的，所以不需要考虑多个线程执行同一个处理时临时表的重名问题，在线程退出的时候，临时表会自动删除。</li></ul><h3 id="_34、mysql-存储引擎介绍-innodb、myisam、memory" tabindex="-1"><a class="header-anchor" href="#_34、mysql-存储引擎介绍-innodb、myisam、memory" aria-hidden="true">#</a> 34、MySQL 存储引擎介绍（InnoDB、MyISAM、MEMORY）</h3><ul><li>InnoDB 是事务型数据库的首选引擎，支持事务安全表 (ACID)，支持行锁定和外键。MySQL5.5.5 之后，InnoDB 作为默认存储引擎</li><li>MyISAM 基于 ISAM 的存储引擎，并对其进行扩展。它是在 Web、数据存储和其他应用环境下最常用的存储引擎之一。MyISAM 拥有较高的插入、查询速度，但不支持事务。在 MySQL5.5.5 之前的版本中，MyISAM 是默认存储引擎</li><li>MEMORY 存储引擎将表中的数据存储到内存中，为查询和引用其他表数据提供快速访问。</li></ul><h3 id="_35、都说-innodb-好-那还要不要使用-memory-引擎" tabindex="-1"><a class="header-anchor" href="#_35、都说-innodb-好-那还要不要使用-memory-引擎" aria-hidden="true">#</a> 35、都说 InnoDB 好，那还要不要使用 MEMORY 引擎？</h3><ul><li>内存表就是使用 memory 引擎创建的表</li><li>为什么我不建议你在生产环境上使用内存表。这里的原因主要包括两个方面：锁粒度问题；数据持久化问题。</li><li>由于重启会丢数据，如果一个备库重启，会导致主备同步线程停止；如果主库跟这个备库是双 M 架构，还可能导致主库的内存表数据被删掉。</li></ul><h3 id="_36、如果数据库误操作-如何执行数据恢复" tabindex="-1"><a class="header-anchor" href="#_36、如果数据库误操作-如何执行数据恢复" aria-hidden="true">#</a> 36、如果数据库误操作, 如何执行数据恢复?</h3><p>数据库在某个时候误操作，就可以找到距离误操作最近的时间节点的bin log，重放到临时数据库里，然后选择误删的数据节点，恢复到线上数据库。</p><h2 id="主从备份相关" tabindex="-1"><a class="header-anchor" href="#主从备份相关" aria-hidden="true">#</a> 主从备份相关</h2><h3 id="_37、mysql-是如何保证主备同步" tabindex="-1"><a class="header-anchor" href="#_37、mysql-是如何保证主备同步" aria-hidden="true">#</a> 37、MySQL 是如何保证主备同步？</h3><p>主备关系的建立：</p><ul><li>一开始创建主备关系的时候，是由备库指定的，比如基于位点的主备关系，备库说“我要从binlog文件A的位置P”开始同步，主库就从这个指定的位置开始往后发。</li><li>而主备关系搭建之后，是主库决定要发给数据给备库的，所以主库有新的日志也会发给备库。</li></ul><p>MySQL 主备切换流程：</p><ul><li>客户端读写都是直接访问A，而节点B是备库，只要将A的更新都同步过来，到本地执行就可以保证数据是相同的。</li><li>当需要切换的时候就把节点换一下，A的节点B的备库</li></ul><p>一个事务完整的同步过程：</p><ul><li><p>备库B和主库A建立来了长链接，主库A内部专门线程用于维护了这个长链接。</p></li><li><p>在备库B上通过changemaster命令设置主库A的IP端口用户名密码以及从哪个位置开始请求binlog包括文件名和日志偏移量</p></li><li><p>在备库B上执行start-slave命令备库会启动两个线程：io_thread和sql_thread分别负责建立连接和读取中转日志进行解析执行</p></li><li><p>备库读取主库传过来的binlog文件备库收到文件写到本地成为中转日志</p></li><li><p>后来由于多线程复制方案的引入，sql_thread演化成了多个线程。</p></li></ul><h3 id="_38、什么是主备延迟" tabindex="-1"><a class="header-anchor" href="#_38、什么是主备延迟" aria-hidden="true">#</a> 38、什么是主备延迟</h3><p>主库和备库在执行同一个事务的时候出现时间差的问题，主要原因有：</p><ul><li>有些部署条件下，备库所在机器的性能要比主库性能差。</li><li>备库的压力较大。</li><li>大事务，一个主库上语句执行10分钟，那么这个事务可能会导致从库延迟10分钟。</li></ul><h3 id="_39、为什么要有多线程复制策略" tabindex="-1"><a class="header-anchor" href="#_39、为什么要有多线程复制策略" aria-hidden="true">#</a> 39、为什么要有多线程复制策略？</h3><ul><li>因为单线程复制的能力全面低于多线程复制，对于更新压力较大的主库，备库可能是一直追不上主库的，带来的现象就是备库上seconds_behind_master值越来越大。</li><li>在实际应用中，建议使用可靠性优先策略，减少主备延迟，提升系统可用性，尽量减少大事务操作，把大事务拆分小事务。</li></ul><h3 id="_40、mysql-的并行策略有哪些" tabindex="-1"><a class="header-anchor" href="#_40、mysql-的并行策略有哪些" aria-hidden="true">#</a> 40、MySQL 的并行策略有哪些？</h3><ul><li>按表分发策略：如果两个事务更新不同的表，它们就可以并行。因为数据是存储在表里的，所以按表分发，可以保证两个 worker 不会更新同一行。缺点：如果碰到热点表，比如所有的更新事务都会涉及到某一个表的时候，所有事务都会被分配到同一个 worker 中，就变成单线程复制了。</li><li>按行分发策略：如果两个事务没有更新相同的行，它们在备库上可以并行。如果两个事务没有更新相同的行，它们在备库上可以并行执行。显然，这个模式要求 binlog 格式必须是 row。缺点：相比于按表并行分发策略，按行并行策略在决定线程分发的时候，需要消耗更多的计算资源。</li></ul><h3 id="_41、mysql的一主一备和一主多从有什么区别" tabindex="-1"><a class="header-anchor" href="#_41、mysql的一主一备和一主多从有什么区别" aria-hidden="true">#</a> 41、MySQL的一主一备和一主多从有什么区别？</h3><p>在一主一备的双 M 架构里，主备切换只需要把客户端流量切到备库；而在一主多从架构里，主备切换除了要把客户端流量切到备库外，还需要把从库接到新主库上。</p><h3 id="_42、主库出问题如何解决" tabindex="-1"><a class="header-anchor" href="#_42、主库出问题如何解决" aria-hidden="true">#</a> 42、主库出问题如何解决?</h3><ul><li>基于位点的主备切换：存在找同步位点这个问题</li><li>MySQL 5.6 版本引入了 GTID，彻底解决了这个困难。那么，GTID 到底是什么意思，又是如何解决找同步位点这个问题呢？</li><li>GTID：全局事务 ID，是一个事务在提交的时候生成的，是这个事务的唯一标识；它由两部分组成，格式是：GTID=server_uuid:gno</li><li>每个 MySQL 实例都维护了一个 GTID 集合，用来对应“这个实例执行过的所有事务”。</li><li>在基于 GTID 的主备关系里，系统认为只要建立主备关系，就必须保证主库发给备库的日志是完整的。因此，如果实例 B 需要的日志已经不存在，A’就拒绝把日志发给 B。</li></ul><h3 id="_43、mysql-读写分离涉及到过期读问题的几种解决方案" tabindex="-1"><a class="header-anchor" href="#_43、mysql-读写分离涉及到过期读问题的几种解决方案" aria-hidden="true">#</a> 43、MySQL 读写分离涉及到过期读问题的几种解决方案?</h3><ul><li>强制走主库方案</li><li>sleep 方案</li><li>判断主备无延迟方案</li><li>配合 semi-sync 方案</li><li>等主库位点方案</li><li>GTID 方案。</li><li>实际生产中，先客户端对请求做分类，区分哪些请求可以接受过期读，而哪些请求完全不能接受过期读；然后，对于不能接受过期读的语句，再使用等 GTID 或等位点的方案。</li></ul><h3 id="_44、mysql的并发链接和并发查询有什么区别" tabindex="-1"><a class="header-anchor" href="#_44、mysql的并发链接和并发查询有什么区别" aria-hidden="true">#</a> 44、MySQL的并发链接和并发查询有什么区别？</h3><ul><li>在执行show processlist的结果里，看到了几千个连接，指的是并发连接。而&quot;当前正在执行&quot;的语句，才是并发查询。</li><li>并发连接数多影响的是内存，并发查询太高对CPU不利。一个机器的CPU核数有限，线程全冲进来，上下文切换的成本就会太高。</li><li>所以需要设置参数：innodb_thread_concurrency 用来限制线程数，当线程数达到该参数，InnoDB就会认为线程数用完了，会阻止其他语句进入引擎执行。</li></ul><h2 id="性能相关" tabindex="-1"><a class="header-anchor" href="#性能相关" aria-hidden="true">#</a> 性能相关</h2><h3 id="_45、短时间提高-mysql-性能的方法" tabindex="-1"><a class="header-anchor" href="#_45、短时间提高-mysql-性能的方法" aria-hidden="true">#</a> 45、短时间提高 MySQL 性能的方法</h3><ul><li>第一种方法：先处理掉那些占着连接但是不工作的线程。或者再考虑断开事务内空闲太久的连接。 kill connection + id</li><li>第二种方法：减少连接过程的消耗：慢查询性能问题在 MySQL 中，会引发性能问题的慢查询，大体有以下三种可能：索引没有设计好；SQL 语句没写好；MySQL 选错了索引（force index）。</li></ul><h3 id="_46、为什么-mysql-自增主键-id-不连续" tabindex="-1"><a class="header-anchor" href="#_46、为什么-mysql-自增主键-id-不连续" aria-hidden="true">#</a> 46、为什么 MySQL 自增主键 ID 不连续？</h3><ul><li><p>唯一键冲突</p></li><li><p>事务回滚</p></li><li><p>自增主键的批量申请</p></li><li><p>深层次原因是：MySQL 不判断自增主键是否存在，从而减少加锁的时间范围和粒度，这样能保持更高的性能，确保自增主键不能回退，所以才有自增主键不连续。</p></li><li><p>自增主键怎么做到唯一性？自增值加1来通过自增锁控制并发</p></li></ul><h3 id="_47、innodb-为什么要用自增-id-作为主键" tabindex="-1"><a class="header-anchor" href="#_47、innodb-为什么要用自增-id-作为主键" aria-hidden="true">#</a> 47、InnoDB 为什么要用自增 ID 作为主键？</h3><ul><li><p>自增主键的插入模式，符合递增插入，每次都是追加操作，不涉及挪动记录，也不会触发叶子节点的分裂。</p></li><li><p>每次插入新的记录就会顺序添加到当前索引节点的后续位置，当一页写满，就会自动开辟一个新的页。</p></li><li><p>而有业务逻辑的字段做主键，不容易保证有序插入，由于每次插入主键的值近似于随机</p></li><li><p>因此每次新纪录都要被插到现有索引页得中间某个位置， 频繁的移动、分页操作造成了大量的碎片，得到了不够紧凑的索引结构，写数据成本较高。</p></li></ul><h3 id="_48、如何最快的复制一张表" tabindex="-1"><a class="header-anchor" href="#_48、如何最快的复制一张表" aria-hidden="true">#</a> 48、如何最快的复制一张表？</h3><ul><li>为了避免对源表加读锁，更稳妥的方案是先将数据写到外部文本文件，然后再写回目标表</li><li>一种方法是，使用 mysqldump 命令将数据导出成一组 INSERT 语句</li><li>另一种方法是直接将结果导出成.csv 文件。MySQL 提供语法，用来将查询结果导出到服务端本地目录：<code>select * from db1.t where a&gt;900 into outfile &#39;/server_tmp/t.csv&#39;</code>;得到.csv 导出文件后，你就可以用下面的 load data 命令将数据导入到目标表 db2.t 中：<code>load data infile &#39;/server_tmp/t.csv&#39; into table db2.t;</code></li><li>物理拷贝：在 MySQL 5.6 版本引入了可传输表空间(transportable tablespace) 的方法，可以通过导出 + 导入表空间的方式，实现物理拷贝表的功能。</li></ul><h3 id="_49、grant-和-flush-privileges语句" tabindex="-1"><a class="header-anchor" href="#_49、grant-和-flush-privileges语句" aria-hidden="true">#</a> 49、grant 和 flush privileges语句</h3><ul><li>grant语句会同时修改数据表和内存，判断权限的时候使用的内存数据，因此，规范使用是不需要加上 flush privileges 语句。</li><li>flush privileges 语句本身会用数据表的数据重建一份内存权限数据，所以在权限数据可能存在不一致的情况下再使用。</li></ul><h3 id="_50、要不要使用分区表" tabindex="-1"><a class="header-anchor" href="#_50、要不要使用分区表" aria-hidden="true">#</a> 50、要不要使用分区表？</h3><ul><li>分区并不是越细越好。实际上，单表或者单分区的数据一千万行，只要没有特别大的索引，对于现在的硬件能力来说都已经是小表了。</li><li>分区也不要提前预留太多，在使用之前预先创建即可。比如，如果是按月分区，每年年底时再把下一年度的 12 个新分区创建上即可。对于没有数据的历史分区，要及时的 drop 掉。</li></ul><h3 id="_51、join-用法" tabindex="-1"><a class="header-anchor" href="#_51、join-用法" aria-hidden="true">#</a> 51、join 用法</h3><ul><li>使用 left join 左边的表不一定是驱动表</li><li>如果需要 left join 的语义，就不能把被驱动表的字段放在 where 条件里面做等值判断或不等值判断，必须都写在 on 里面</li><li>标准的 group by 语句，是需要在 select 部分加一个聚合函数，比如<code>select a,count(*) from t group by a order by null;</code></li></ul><h3 id="_52、mysql-有哪些自增id-各自场景是什么" tabindex="-1"><a class="header-anchor" href="#_52、mysql-有哪些自增id-各自场景是什么" aria-hidden="true">#</a> 52、MySQL 有哪些自增ID？各自场景是什么？</h3><ul><li><p>表的自增 ID 达到上限之后，在申请值不会变化，进而导致联系插入数据的时候报主键冲突错误。</p></li><li><p>row_id 达到上限之后，归 0 在重新递增，如果出现相同的 row_id 后写的数据会覆盖之前的数据。</p></li><li><p>Xid 只需要不在同一个 binlog 文件出现重复值即可，理论上会出现重复值，但概率极小可忽略不计。</p></li><li><p>InnoDB 的 max_trx_id 递增值每次 MySQL 重启会保存起来。</p></li><li><p>Xid 是由 server 层维护的。InnoDB 内部使用 Xid，就是为了能够在 InnoDB 事务和 server 之间做关联。但是，InnoDB 自己的 trx_id，是另外维护的。</p></li><li><p>thread_id 是我们使用中最常见的，而且也是处理得最好的一个自增 id 逻辑了。使用了insert_unique算法</p></li></ul><h3 id="_53、xid-在-mysql-内部是怎么生成的呢" tabindex="-1"><a class="header-anchor" href="#_53、xid-在-mysql-内部是怎么生成的呢" aria-hidden="true">#</a> 53、Xid 在 MySQL 内部是怎么生成的呢？</h3><p><strong>MySQL 内部维护了一个全局变量 global_query_id，每次执行语句（包括select语句）的时候将它赋值给 Query_id，然后给这个变量加 1。如果当前语句是这个事务执行的第一条语句，那么 MySQL 还会同时把 Query_id 赋值给这个事务的 Xid。</strong></p><p>而 global_query_id 是一个纯内存变量，重启之后就清零了。所以你就知道了，在同一个数据库实例中，不同事务的 Xid 也是有可能相同的。但是 MySQL 重启之后会重新生成新的 binlog 文件，这就保证了，同一个 binlog 文件里，Xid 一定是惟一的。</p><h2 id="锁相关" tabindex="-1"><a class="header-anchor" href="#锁相关" aria-hidden="true">#</a> 锁相关</h2><h3 id="_54、说一下-mysql-的锁" tabindex="-1"><a class="header-anchor" href="#_54、说一下-mysql-的锁" aria-hidden="true">#</a> 54、说一下 MySQL 的锁</h3><ul><li>MySQL 在 server 层 和 存储引擎层 都运用了大量的锁</li><li>MySQL server 层需要讲两种锁，第一种是MDL(metadata lock) 元数据锁，第二种则 Table Lock 表锁。</li><li>MDL 又名元数据锁，那么什么是元数据呢，任何描述数据库的内容就是元数据，比如我们的表结构、库结构等都是元数据。那为什么需要 MDL 呢？</li><li>主要解决两个问题：事务隔离问题；数据复制问题</li><li>InnoDB 有五种表级锁：IS（意向读锁）；IX（意向写锁）；S（读）；X（写）；AUTO-INC</li><li>在对表进行select/insert/delete/update语句时候不会加表级锁</li><li>IS和IX的作用是为了判断表中是否有已经被加锁的记录</li><li>自增主键的保障就是有 AUTO-INC 锁，是语句级别的：为表的某个列添加 AUTO_INCREMENT 属性，之后在插⼊记录时，可以不指定该列的值，系统会⾃动为它赋上单调递增的值。</li><li>InnoDB 4 种行级锁</li><li>RecordLock：记录锁</li><li>GapLock：间隙锁解决幻读；前一次查询不存在的东西在下一次查询出现了，其实就是事务A中的两次查询之间事务B执行插入操作被事务A感知了</li><li>Next-KeyLock：锁住某条记录又想阻止其它事务在改记录前面的间隙插入新纪录</li><li>InsertIntentionLock：插入意向锁;如果插入到同一行间隙中的多个事务未插入到间隙内的同一位置则无须等待</li><li>行锁和表锁的抉择 <ul><li>全表扫描用行级锁</li></ul></li></ul><h3 id="_55、什么是幻读" tabindex="-1"><a class="header-anchor" href="#_55、什么是幻读" aria-hidden="true">#</a> 55、什么是幻读？</h3><p>值在同一个事务中，存在前后两次查询同一个范围的数据，第二次看到了第一次没有查询到的数据。</p><p>幻读出现的场景：</p><ul><li>事务的隔离级别是可重复读，且是当前读。</li><li>幻读指新插入的行。</li></ul><p>幻读带来的问题：</p><ul><li>对行锁语义的破坏</li><li>破坏了数据一致性</li></ul><p>解决：</p><ul><li>加间隙锁，锁住行与行之间的间隙，阻塞新插入的操作。</li><li>带来的问题：降低并发度，可能导致死锁。</li></ul><h2 id="其它为什么系列" tabindex="-1"><a class="header-anchor" href="#其它为什么系列" aria-hidden="true">#</a> 其它为什么系列</h2><h3 id="_56、为什么-mysql-会抖一下" tabindex="-1"><a class="header-anchor" href="#_56、为什么-mysql-会抖一下" aria-hidden="true">#</a> 56、为什么 MySQL 会抖一下？</h3><ul><li>脏页会被后台线程自动 flush，也会由于数据页淘汰而触发 flush，而刷脏页的过程由于会占用资源，可能会让你的更新和查询语句的响应时间长一些。</li></ul><h3 id="_57、为什么删除了表-表文件的大小还是没变" tabindex="-1"><a class="header-anchor" href="#_57、为什么删除了表-表文件的大小还是没变" aria-hidden="true">#</a> 57、为什么删除了表，表文件的大小还是没变？</h3><ul><li>数据项删除之后 InnoDB 某个页 page A 会被标记为可复用。</li><li>delete 命令把整个表的数据删除，结果就是，所有的数据页都会被标记为可复用。但是磁盘上，文件不会变小。</li><li>经过大量增删改的表，都是可能是存在空洞的。这些空洞也占空间所以，如果能够把这些空洞去掉，就能达到收缩表空间的目的。</li><li>重建表，就可以达到这样的目的。可以使用 alter table A engine=InnoDB 命令来重建表。</li></ul><h3 id="_58、count-实现方式以及各种-count-对比" tabindex="-1"><a class="header-anchor" href="#_58、count-实现方式以及各种-count-对比" aria-hidden="true">#</a> 58、<code>count(*)</code>实现方式以及各种 count 对比</h3><ul><li>对于 count(主键 id) 来说，InnoDB 引擎会遍历整张表，把每一行的 id 值都取出来，返回给 server 层。server 层拿到 id 后，判断是不可能为空的，就按行累加。</li><li>对于 count(1) 来说，InnoDB 引擎遍历整张表，但不取值。server 层对于返回的每一行，放一个数字“1”进去，判断是不可能为空的，按行累加。 单看这两个用法的差别的话，你能对比出来，count(1) 执行得要比 count(主键 id) 快。因为从引擎返回 id 会涉及到解析数据行，以及拷贝字段值的操作。</li><li>对于 count(字段) 来说：如果这个“字段”是定义为 not null 的话，一行行地从记录里面读出这个字段，判断不能为 null，按行累加；如果这个“字段”定义允许为 null，那么执行的时候，判断到有可能是 null，还要把值取出来再判断一下，不是 null 才累加。也就是前面的第一条原则，server 层要什么字段，InnoDB 就返回什么字段。</li><li>但是 <code>count *</code> 是例外，并不会把全部字段取出来，而是专门做了优化，不取值。<code>count(*)</code>肯定不是 null，按行累加。</li><li>所以结论是：按照效率排序的话，count(字段)<code>&lt;count(主键 id)&lt;count(1)≈count(※)</code>，所以建议尽量使用 <code>count(*)</code>。</li></ul><h3 id="_59、orderby-排序内部原理" tabindex="-1"><a class="header-anchor" href="#_59、orderby-排序内部原理" aria-hidden="true">#</a> 59、orderby 排序内部原理</h3><ul><li><p>MySQL 会为每个线程分配一个内存（sort-buffer）用于排序该内存大小为 sort_buffer_size；</p></li><li><p>如果排序的数据量小于 sort_buffer_size，排序就会在内存中完成；</p><p>内部排序分为两种</p></li><li><p>全字段排序：到索引树上找到满足条件的主键ID根据主键ID去取出数据放到sort_buffer然后进行快速排序</p></li><li><p>rowid排序：通过控制排序的行数据的长度来让sort_buffer中尽可能多的存放数据</p></li><li><p>如果数据量很大，内存中无法存下这么多，就会使用磁盘临时文件来辅助排序，称为外部排序；</p></li><li><p>外部排序，MySQL会分为好几份单独的临时文件来存放排序后的数据，一般是磁盘文件中进行归并，然后将这些文件合并成一个大文件；</p></li></ul><h3 id="_60、如何高效的使用-mysql-显式随机消息" tabindex="-1"><a class="header-anchor" href="#_60、如何高效的使用-mysql-显式随机消息" aria-hidden="true">#</a> 60、如何高效的使用 MySQL 显式随机消息</h3><ul><li><p>随机取出 Y1,Y2,Y3之后，算出Ymax,Ymin</p></li><li><p>得到id集后算出Y1、Y2、Y3对应的三个id 最后 select * from t where id in (id1, id2, id3) 这样扫描的行数应该是C+Ymax+3</p></li></ul><div class="language-mysql ext-mysql line-numbers-mode"><pre class="language-mysql"><code>  mysql&gt; select count(*) into @C from t;
   set @Y1 = floor(@C * rand());
   set @Y2 = floor(@C * rand());
@@ -51,6 +51,6 @@
   Ymin = min(Y1,Y2,Y3)
   select id from t limit Ymin，(Ymax - Ymin)
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><blockquote><p>图文详解 60 道 MySQL 面试高频题，这次吊打面试官，我觉得稳了（手动 dog）。整理：沉默王二，戳<a href="https://mp.weixin.qq.com/s/c-sy7tM0BmrqMUQFW7C65g" target="_blank" rel="noopener noreferrer">转载链接<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，里面有局详细的思维导图；作者：herongwei，戳<a href="https://mp.weixin.qq.com/s/-SqqKmhZcOlQxM-rHiIpKg" target="_blank" rel="noopener noreferrer">原文链接<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>。</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/sidebar/herongwei/mysql.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/14 上午7:14:28</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/baguwen/jvm.html" class="nav-link prev" aria-label="Java 虚拟机八股文（背诵版）必看👍"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->Java 虚拟机八股文（背诵版）必看👍</div></a><!----></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="7.CopyOnWriteArrayList了解多少？"><!---->7.CopyOnWriteArrayList了解多少？<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/collection.html#map" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="Map"><!---->Map<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/collection.html#_8-能说一下hashmap的数据结构吗" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="8.能说一下HashMap的数据结构吗？"><!---->8.能说一下HashMap的数据结构吗？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/collection.html#_9-你对红黑树了解多少-为什么不用二叉树-平衡树呢" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="9.你对红黑树了解多少？为什么不用二叉树/平衡树呢？"><!---->9.你对红黑树了解多少？为什么不用二叉树/平衡树呢？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/collection.html#_10-红黑树怎么保持平衡的知道吗" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="10.红黑树怎么保持平衡的知道吗？"><!---->10.红黑树怎么保持平衡的知道吗？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/collection.html#_11-hashmap的put流程知道吗" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="11.HashMap的put流程知道吗？"><!---->11.HashMap的put流程知道吗？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/collection.html#_12-hashmap怎么查找元素的呢" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="12.HashMap怎么查找元素的呢？"><!---->12.HashMap怎么查找元素的呢？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/collection.html#_13-hashmap的哈希-扰动函数是怎么设计的" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="13.HashMap的哈希/扰动函数是怎么设计的?"><!---->13.HashMap的哈希/扰动函数是怎么设计的?<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/collection.html#_14-为什么哈希-扰动函数能降hash碰撞" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="14.为什么哈希/扰动函数能降hash碰撞？"><!---->14.为什么哈希/扰动函数能降hash碰撞？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/collection.html#_15-为什么hashmap的容量是2的倍数呢" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="15.为什么HashMap的容量是2的倍数呢？"><!---->15.为什么HashMap的容量是2的倍数呢？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/collection.html#_16-如果初始化hashmap-传一个17的值new-hashmap-它会怎么处理" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="16.如果初始化HashMap，传一个17的值new HashMap&lt;&gt;，它会怎么处理？"><!---->16.如果初始化HashMap，传一个17的值new HashMap&lt;&gt;，它会怎么处理？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/collection.html#_17-你还知道哪些哈希函数的构造方法呢" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="17.你还知道哪些哈希函数的构造方法呢？"><!---->17.你还知道哪些哈希函数的构造方法呢？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/collection.html#_18-解决哈希冲突有哪些方法呢" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="18.解决哈希冲突有哪些方法呢？"><!---->18.解决哈希冲突有哪些方法呢？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/collection.html#_19-为什么hashmap链表转红黑树的阈值为8呢" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="19.为什么HashMap链表转红黑树的阈值为8呢？"><!---->19.为什么HashMap链表转红黑树的阈值为8呢？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/collection.html#_20-扩容在什么时候呢-为什么扩容因子是0-75" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="20.扩容在什么时候呢？为什么扩容因子是0.75？"><!---->20.扩容在什么时候呢？为什么扩容因子是0.75？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/collection.html#_21-那扩容机制了解吗" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="21.那扩容机制了解吗？"><!---->21.那扩容机制了解吗？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/collection.html#_22-jdk1-8对hashmap主要做了哪些优化呢-为什么" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="22.jdk1.8对HashMap主要做了哪些优化呢？为什么？"><!---->22.jdk1.8对HashMap主要做了哪些优化呢？为什么？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/collection.html#_23-你能自己设计实现一个hashmap吗" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="23.你能自己设计实现一个HashMap吗？"><!---->23.你能自己设计实现一个HashMap吗？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/collection.html#_24-hashmap-是线程安全的吗-多线程下会有什么问题" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="24.HashMap 是线程安全的吗？多线程下会有什么问题？"><!---->24.HashMap 是线程安全的吗？多线程下会有什么问题？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/collection.html#_25-有什么办法能解决hashmap线程不安全的问题呢" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="25.有什么办法能解决HashMap线程不安全的问题呢？"><!---->25.有什么办法能解决HashMap线程不安全的问题呢？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/collection.html#_26-能具体说一下concurrenthashmap的实现吗" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="26.能具体说一下ConcurrentHashmap的实现吗？"><!---->26.能具体说一下ConcurrentHashmap的实现吗？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/collection.html#_27-hashmap-内部节点是有序的吗" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="27.HashMap 内部节点是有序的吗？"><!---->27.HashMap 内部节点是有序的吗？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/collection.html#_28-讲讲-linkedhashmap-怎么实现有序的" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="28.讲讲 LinkedHashMap 怎么实现有序的？"><!---->28.讲讲 LinkedHashMap 怎么实现有序的？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/collection.html#_29-讲讲-treemap-怎么实现有序的" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="29.讲讲 TreeMap 怎么实现有序的？"><!---->29.讲讲 TreeMap 怎么实现有序的？<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/collection.html#set" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="Set"><!---->Set<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/collection.html#_30-讲讲hashset的底层实现" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="30.讲讲HashSet的底层实现？"><!---->30.讲讲HashSet的底层实现？<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li></ul><!--]--></li><li><!--[--><a href="/sidebar/sanfene/javathread.html" class="nav-link sidebar-link sidebar-page" aria-label="Java 并发编程"><!---->Java 并发编程<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/sidebar/sanfene/jvm.html" class="nav-link sidebar-link sidebar-page" aria-label="Java 虚拟机"><!---->Java 虚拟机<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/sidebar/sanfene/spring.html" class="nav-link sidebar-link sidebar-page" aria-label="Spring"><!---->Spring<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/sidebar/sanfene/redis.html" class="nav-link sidebar-link sidebar-page" aria-label="Redis"><!---->Redis<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/sidebar/sanfene/mybatis.html" class="nav-link sidebar-link sidebar-page" aria-label="MyBatis"><!---->MyBatis<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->面渣逆袭（Java 集合框架篇）必看👍</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月9日</span><meta property="datePublished" content="2022-03-09T04:47:34.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category3" role>面渣逆袭</li><meta property="articleSection" content="面渣逆袭"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 27 分钟</span><meta property="timeRequired" content="PT27M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/collection.html#引言" class="router-link-active router-link-exact-active toc-link level2">引言</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/collection.html#_1-说说有哪些常见集合" class="router-link-active router-link-exact-active toc-link level3">1.说说有哪些常见集合？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/collection.html#list" class="router-link-active router-link-exact-active toc-link level2">List</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/collection.html#_2-arraylist和linkedlist有什么区别" class="router-link-active router-link-exact-active toc-link level3">2.ArrayList和LinkedList有什么区别？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/collection.html#_3-arraylist的扩容机制了解吗" class="router-link-active router-link-exact-active toc-link level3">3.ArrayList的扩容机制了解吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/collection.html#_4-arraylist怎么序列化的知道吗-为什么用transient修饰数组" class="router-link-active router-link-exact-active toc-link level3">4.ArrayList怎么序列化的知道吗？ 为什么用transient修饰数组？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/collection.html#_5-快速失败-fail-fast-和安全失败-fail-safe-了解吗" class="router-link-active router-link-exact-active toc-link level3">5.快速失败(fail-fast)和安全失败(fail-safe)了解吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/collection.html#_6-有哪几种实现arraylist线程安全的方法" class="router-link-active router-link-exact-active toc-link level3">6.有哪几种实现ArrayList线程安全的方法？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/collection.html#_7-copyonwritearraylist了解多少" class="router-link-active router-link-exact-active toc-link level3">7.CopyOnWriteArrayList了解多少？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/collection.html#map" class="router-link-active router-link-exact-active toc-link level2">Map</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/collection.html#_8-能说一下hashmap的数据结构吗" class="router-link-active router-link-exact-active toc-link level3">8.能说一下HashMap的数据结构吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/collection.html#_9-你对红黑树了解多少-为什么不用二叉树-平衡树呢" class="router-link-active router-link-exact-active toc-link level3">9.你对红黑树了解多少？为什么不用二叉树/平衡树呢？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/collection.html#_10-红黑树怎么保持平衡的知道吗" class="router-link-active router-link-exact-active toc-link level3">10.红黑树怎么保持平衡的知道吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/collection.html#_11-hashmap的put流程知道吗" class="router-link-active router-link-exact-active toc-link level3">11.HashMap的put流程知道吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/collection.html#_12-hashmap怎么查找元素的呢" class="router-link-active router-link-exact-active toc-link level3">12.HashMap怎么查找元素的呢？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/collection.html#_13-hashmap的哈希-扰动函数是怎么设计的" class="router-link-active router-link-exact-active toc-link level3">13.HashMap的哈希/扰动函数是怎么设计的?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/collection.html#_14-为什么哈希-扰动函数能降hash碰撞" class="router-link-active router-link-exact-active toc-link level3">14.为什么哈希/扰动函数能降hash碰撞？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/collection.html#_15-为什么hashmap的容量是2的倍数呢" class="router-link-active router-link-exact-active toc-link level3">15.为什么HashMap的容量是2的倍数呢？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/collection.html#_16-如果初始化hashmap-传一个17的值new-hashmap-它会怎么处理" class="router-link-active router-link-exact-active toc-link level3">16.如果初始化HashMap，传一个17的值new HashMap&lt;&gt;，它会怎么处理？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/collection.html#_17-你还知道哪些哈希函数的构造方法呢" class="router-link-active router-link-exact-active toc-link level3">17.你还知道哪些哈希函数的构造方法呢？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/collection.html#_18-解决哈希冲突有哪些方法呢" class="router-link-active router-link-exact-active toc-link level3">18.解决哈希冲突有哪些方法呢？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/collection.html#_19-为什么hashmap链表转红黑树的阈值为8呢" class="router-link-active router-link-exact-active toc-link level3">19.为什么HashMap链表转红黑树的阈值为8呢？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/collection.html#_20-扩容在什么时候呢-为什么扩容因子是0-75" class="router-link-active router-link-exact-active toc-link level3">20.扩容在什么时候呢？为什么扩容因子是0.75？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/collection.html#_21-那扩容机制了解吗" class="router-link-active router-link-exact-active toc-link level3">21.那扩容机制了解吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/collection.html#_22-jdk1-8对hashmap主要做了哪些优化呢-为什么" class="router-link-active router-link-exact-active toc-link level3">22.jdk1.8对HashMap主要做了哪些优化呢？为什么？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/collection.html#_23-你能自己设计实现一个hashmap吗" class="router-link-active router-link-exact-active toc-link level3">23.你能自己设计实现一个HashMap吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/collection.html#_24-hashmap-是线程安全的吗-多线程下会有什么问题" class="router-link-active router-link-exact-active toc-link level3">24.HashMap 是线程安全的吗？多线程下会有什么问题？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/collection.html#_25-有什么办法能解决hashmap线程不安全的问题呢" class="router-link-active router-link-exact-active toc-link level3">25.有什么办法能解决HashMap线程不安全的问题呢？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/collection.html#_26-能具体说一下concurrenthashmap的实现吗" class="router-link-active router-link-exact-active toc-link level3">26.能具体说一下ConcurrentHashmap的实现吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/collection.html#_27-hashmap-内部节点是有序的吗" class="router-link-active router-link-exact-active toc-link level3">27.HashMap 内部节点是有序的吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/collection.html#_28-讲讲-linkedhashmap-怎么实现有序的" class="router-link-active router-link-exact-active toc-link level3">28.讲讲 LinkedHashMap 怎么实现有序的？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/collection.html#_29-讲讲-treemap-怎么实现有序的" class="router-link-active router-link-exact-active toc-link level3">29.讲讲 TreeMap 怎么实现有序的？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/collection.html#set" class="router-link-active router-link-exact-active toc-link level2">Set</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/collection.html#_30-讲讲hashset的底层实现" class="router-link-active router-link-exact-active toc-link level3">30.讲讲HashSet的底层实现？</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="面渣逆袭-java-集合框架篇-必看" tabindex="-1"><a class="header-anchor" href="#面渣逆袭-java-集合框架篇-必看" aria-hidden="true">#</a> 面渣逆袭（Java 集合框架篇）必看👍</h1><blockquote><p>图文详解 30 道Java集合框架面试高频题，这次吊打面试官，我觉得稳了（手动 dog）。整理：沉默王二，戳<a href="https://mp.weixin.qq.com/s/ptbM0EqlnCWeWm9VdSCDLg" target="_blank" rel="noopener noreferrer">转载链接<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，作者：三分恶，戳<a href="https://mp.weixin.qq.com/s/SHkQ7LEOT0itt4bXMoDBPw" target="_blank" rel="noopener noreferrer">原文链接<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>。</p></blockquote><h2 id="引言" tabindex="-1"><a class="header-anchor" href="#引言" aria-hidden="true">#</a> 引言</h2><h3 id="_1-说说有哪些常见集合" tabindex="-1"><a class="header-anchor" href="#_1-说说有哪些常见集合" aria-hidden="true">#</a> 1.说说有哪些常见集合？</h3><p>集合相关类和接口都在java.util中，主要分为3种：List（列表）、Map（映射）、Set(集)。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/collection-1.png" alt="Java集合主要关系"></p><p>其中<code>Collection</code>是集合<code>List</code>、<code>Set</code>的父接口，它主要有两个子接口：</p><ul><li><code>List</code>：存储的元素有序，可重复。</li><li><code>Set</code>：存储的元素不无序，不可重复。</li></ul><p><code>Map</code>是另外的接口，是键值对映射结构的集合。</p><h2 id="list" tabindex="-1"><a class="header-anchor" href="#list" aria-hidden="true">#</a> List</h2><p>List，也没啥好问的，但不排除面试官剑走偏锋，比如面试官也看了我这篇文章。</p><h3 id="_2-arraylist和linkedlist有什么区别" tabindex="-1"><a class="header-anchor" href="#_2-arraylist和linkedlist有什么区别" aria-hidden="true">#</a> 2.ArrayList和LinkedList有什么区别？</h3><p>**（1）**数据结构不同</p><ul><li>ArrayList基于数组实现</li><li>LinkedList基于双向链表实现</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/collection-2.png" alt="ArrayList和LinkedList的数据结构"></p><p><strong>（2）</strong> 多数情况下，ArrayList更利于查找，LinkedList更利于增删</p><ul><li><p>ArrayList基于数组实现，get(int index)可以直接通过数组下标获取，时间复杂度是O(1)；LinkedList基于链表实现，get(int index)需要遍历链表，时间复杂度是O(n)；当然，get(E element)这种查找，两种集合都需要遍历，时间复杂度都是O(n)。</p></li><li><p>ArrayList增删如果是数组末尾的位置，直接插入或者删除就可以了，但是如果插入中间的位置，就需要把插入位置后的元素都向前或者向后移动，甚至还有可能触发扩容；双向链表的插入和删除只需要改变前驱节点、后继节点和插入节点的指向就行了，不需要移动元素。</p></li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/collection-3.png" alt="ArrayList和LinkedList中间插入"></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/collection-4.png" alt="ArrayList和LinkedList中间删除"></p><blockquote><p>注意，这个地方可能会出陷阱，LinkedList更利于增删更多是体现在平均步长上，不是体现在时间复杂度上，二者增删的时间复杂度都是O(n)</p></blockquote><p>**（3）**是否支持随机访问</p><ul><li>ArrayList基于数组，所以它可以根据下标查找，支持随机访问，当然，它也实现了RandmoAccess 接口，这个接口只是用来标识是否支持随机访问。</li><li>LinkedList基于链表，所以它没法根据序号直接获取元素，它没有实现RandmoAccess 接口，标记不支持随机访问。</li></ul><p>**（4）**内存占用，ArrayList基于数组，是一块连续的内存空间，LinkedList基于链表，内存空间不连续，它们在空间占用上都有一些额外的消耗：</p><ul><li>ArrayList是预先定义好的数组，可能会有空的内存空间，存在一定空间浪费</li><li>LinkedList每个节点，需要存储前驱和后继，所以每个节点会占用更多的空间</li></ul><h3 id="_3-arraylist的扩容机制了解吗" tabindex="-1"><a class="header-anchor" href="#_3-arraylist的扩容机制了解吗" aria-hidden="true">#</a> 3.ArrayList的扩容机制了解吗？</h3><p>ArrayList是基于数组的集合，数组的容量是在定义的时候确定的，如果数组满了，再插入，就会数组溢出。所以在插入时候，会先检查是否需要扩容，如果当前容量+1超过数组长度，就会进行扩容。</p><p>ArrayList的扩容是创建一个<strong>1.5倍</strong>的新数组，然后把原数组的值拷贝过去。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/collection-5.png" alt="ArrayList扩容"></p><h3 id="_4-arraylist怎么序列化的知道吗-为什么用transient修饰数组" tabindex="-1"><a class="header-anchor" href="#_4-arraylist怎么序列化的知道吗-为什么用transient修饰数组" aria-hidden="true">#</a> 4.ArrayList怎么序列化的知道吗？ 为什么用transient修饰数组？</h3><p>ArrayList的序列化不太一样，它使用<code>transient</code>修饰存储元素的<code>elementData</code>的数组，<code>transient</code>关键字的作用是让被修饰的成员属性不被序列化。</p><p><strong>为什么最ArrayList不直接序列化元素数组呢？</strong></p><p>出于效率的考虑，数组可能长度100，但实际只用了50，剩下的50不用其实不用序列化，这样可以提高序列化和反序列化的效率，还可以节省内存空间。</p><p><strong>那ArrayList怎么序列化呢？</strong></p><p>ArrayList通过两个方法<strong>readObject、writeObject</strong>自定义序列化和反序列化策略，实际直接使用两个流<code>ObjectOutputStream</code>和<code>ObjectInputStream</code>来进行序列化和反序列化。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/collection-6.png" alt="ArrayList自定义序列化"></p><h3 id="_5-快速失败-fail-fast-和安全失败-fail-safe-了解吗" tabindex="-1"><a class="header-anchor" href="#_5-快速失败-fail-fast-和安全失败-fail-safe-了解吗" aria-hidden="true">#</a> 5.快速失败(fail-fast)和安全失败(fail-safe)了解吗？</h3><p><strong>快速失败（fail—fast）</strong>：快速失败是Java集合的一种错误检测机制</p><ul><li>在用迭代器遍历一个集合对象时，如果线程A遍历过程中，线程B对集合对象的内容进行了修改（增加、删除、修改），则会抛出Concurrent Modification Exception。</li><li>原理：迭代器在遍历时直接访问集合中的内容，并且在遍历过程中使用一个 <code> modCount</code> 变量。集合在被遍历期间如果内容发生变化，就会改变<code>modCount</code>的值。每当迭代器使用hashNext()/next()遍历下一个元素之前，都会检测modCount变量是否为expectedmodCount值，是的话就返回遍历；否则抛出异常，终止遍历。</li><li>注意：这里异常的抛出条件是检测到 modCount！=expectedmodCount 这个条件。如果集合发生变化时修改modCount值刚好又设置为了expectedmodCount值，则异常不会抛出。因此，不能依赖于这个异常是否抛出而进行并发操作的编程，这个异常只建议用于检测并发修改的bug。</li><li>场景：java.util包下的集合类都是快速失败的，不能在多线程下发生并发修改（迭代过程中被修改），比如ArrayList 类。</li></ul><p><strong>安全失败（fail—safe）</strong></p><ul><li>采用安全失败机制的集合容器，在遍历时不是直接在集合内容上访问的，而是先复制原有集合内容，在拷贝的集合上进行遍历。</li><li>原理：由于迭代时是对原集合的拷贝进行遍历，所以在遍历过程中对原集合所作的修改并不能被迭代器检测到，所以不会触发Concurrent Modification Exception。</li><li>缺点：基于拷贝内容的优点是避免了Concurrent Modification Exception，但同样地，迭代器并不能访问到修改后的内容，即：迭代器遍历的是开始遍历那一刻拿到的集合拷贝，在遍历期间原集合发生的修改迭代器是不知道的。</li><li>场景：java.util.concurrent包下的容器都是安全失败，可以在多线程下并发使用，并发修改，比如CopyOnWriteArrayList类。</li></ul><h3 id="_6-有哪几种实现arraylist线程安全的方法" tabindex="-1"><a class="header-anchor" href="#_6-有哪几种实现arraylist线程安全的方法" aria-hidden="true">#</a> 6.有哪几种实现ArrayList线程安全的方法？</h3><p>fail-fast是一种可能触发的机制，实际上，ArrayList的线程安全仍然没有保证，一般，保证ArrayList的线程安全可以通过这些方案：</p><ul><li>使用 Vector 代替 ArrayList。（不推荐，Vector是一个历史遗留类）</li><li>使用 Collections.synchronizedList 包装 ArrayList，然后操作包装后的 list。</li><li>使用 CopyOnWriteArrayList 代替 ArrayList。</li><li>在使用 ArrayList 时，应用程序通过同步机制去控制 ArrayList 的读写。</li></ul><h3 id="_7-copyonwritearraylist了解多少" tabindex="-1"><a class="header-anchor" href="#_7-copyonwritearraylist了解多少" aria-hidden="true">#</a> 7.CopyOnWriteArrayList了解多少？</h3><p>CopyOnWriteArrayList就是线程安全版本的ArrayList。</p><p>它的名字叫<code>CopyOnWrite</code>——写时复制，已经明示了它的原理。</p><p>CopyOnWriteArrayList采用了一种读写分离的并发策略。CopyOnWriteArrayList容器允许并发读，读操作是无锁的，性能较高。至于写操作，比如向容器中添加一个元素，则首先将当前容器复制一份，然后在新副本上执行写操作，结束之后再将原容器的引用指向新容器。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/collection-7.png" alt="CopyOnWriteArrayList原理"></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><h2 id="map" tabindex="-1"><a class="header-anchor" href="#map" aria-hidden="true">#</a> Map</h2><p>Map中，毫无疑问，最重要的就是HashMap，面试基本被盘出包浆了，各种问法，一定要好好准备。</p><h3 id="_8-能说一下hashmap的数据结构吗" tabindex="-1"><a class="header-anchor" href="#_8-能说一下hashmap的数据结构吗" aria-hidden="true">#</a> 8.能说一下HashMap的数据结构吗？</h3><p>JDK1.7的数据结构是<code>数组</code>+<code>链表</code>，JDK1.7还有人在用？不会吧……</p><p>说一下JDK1.8的数据结构吧：</p><p>JDK1.8的数据结构是<code>数组</code>+<code>链表</code>+<code>红黑树</code>。</p><p>数据结构示意图如下：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/collection-8.png" alt="jdk1.8 hashmap数据结构示意图"></p><p>其中，桶数组是用来存储数据元素，链表是用来解决冲突，红黑树是为了提高查询的效率。</p><ul><li>数据元素通过映射关系，也就是散列函数，映射到桶数组对应索引的位置</li><li>如果发生冲突，从冲突的位置拉一个链表，插入冲突的元素</li><li>如果链表长度&gt;8&amp;数组大小&gt;=64，链表转为红黑树</li><li>如果红黑树节点个数&lt;6 ，转为链表</li></ul><h3 id="_9-你对红黑树了解多少-为什么不用二叉树-平衡树呢" tabindex="-1"><a class="header-anchor" href="#_9-你对红黑树了解多少-为什么不用二叉树-平衡树呢" aria-hidden="true">#</a> 9.你对红黑树了解多少？为什么不用二叉树/平衡树呢？</h3><p>红黑树本质上是一种二叉查找树，为了保持平衡，它又在二叉查找树的基础上增加了一些规则：</p><ol><li>每个节点要么是红色，要么是黑色；</li><li>根节点永远是黑色的；</li><li>所有的叶子节点都是是黑色的（注意这里说叶子节点其实是图中的 NULL 节点）；</li><li>每个红色节点的两个子节点一定都是黑色；</li><li>从任一节点到其子树中每个叶子节点的路径都包含相同数量的黑色节点；</li></ol><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/collection-9.png" alt="红黑树"></p><blockquote><p>之所以不用二叉树：</p></blockquote><p>红黑树是一种平衡的二叉树，插入、删除、查找的最坏时间复杂度都为 O(logn)，避免了二叉树最坏情况下的O(n)时间复杂度。</p><blockquote><p>之所以不用平衡二叉树：</p></blockquote><p>平衡二叉树是比红黑树更严格的平衡树，为了保持保持平衡，需要旋转的次数更多，也就是说平衡二叉树保持平衡的效率更低，所以平衡二叉树插入和删除的效率比红黑树要低。</p><h3 id="_10-红黑树怎么保持平衡的知道吗" tabindex="-1"><a class="header-anchor" href="#_10-红黑树怎么保持平衡的知道吗" aria-hidden="true">#</a> 10.红黑树怎么保持平衡的知道吗？</h3><p>红黑树有两种方式保持平衡：<code>旋转</code>和<code>染色</code>。</p><ul><li>旋转：旋转分为两种，左旋和右旋</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/collection-10.png" alt="左旋"></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/collection-11.png" alt="右旋"></p><ul><li>染⾊：</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/collection-12.png" alt="染色"></p><h3 id="_11-hashmap的put流程知道吗" tabindex="-1"><a class="header-anchor" href="#_11-hashmap的put流程知道吗" aria-hidden="true">#</a> 11.HashMap的put流程知道吗？</h3><p>先上个流程图吧:</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/collection-13.jpg" alt="HashMap插入数据流程图"></p><ol><li><p>首先进行哈希值的扰动，获取一个新的哈希值。<code>(key == null) ? 0 : (h = key.hashCode()) ^ (h &gt;&gt;&gt; 16);</code></p></li><li><p>判断tab是否位空或者长度为0，如果是则进行扩容操作。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token punctuation">(</span>tab <span class="token operator">=</span> table<span class="token punctuation">)</span> <span class="token operator">==</span> <span class="token keyword">null</span> <span class="token operator">||</span> <span class="token punctuation">(</span>n <span class="token operator">=</span> tab<span class="token punctuation">.</span>length<span class="token punctuation">)</span> <span class="token operator">==</span> <span class="token number">0</span><span class="token punctuation">)</span>
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nav-link sidebar-link heading" aria-label="2.ArrayList和LinkedList有什么区别？"><!---->2.ArrayList和LinkedList有什么区别？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/collection.html#_3-arraylist的扩容机制了解吗" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="3.ArrayList的扩容机制了解吗？"><!---->3.ArrayList的扩容机制了解吗？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/collection.html#_4-arraylist怎么序列化的知道吗-为什么用transient修饰数组" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="4.ArrayList怎么序列化的知道吗？ 为什么用transient修饰数组？"><!---->4.ArrayList怎么序列化的知道吗？ 为什么用transient修饰数组？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/collection.html#_5-快速失败-fail-fast-和安全失败-fail-safe-了解吗" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="5.快速失败(fail-fast)和安全失败(fail-safe)了解吗？"><!---->5.快速失败(fail-fast)和安全失败(fail-safe)了解吗？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/collection.html#_6-有哪几种实现arraylist线程安全的方法" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="6.有哪几种实现ArrayList线程安全的方法？"><!---->6.有哪几种实现ArrayList线程安全的方法？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/collection.html#_7-copyonwritearraylist了解多少" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="7.CopyOnWriteArrayList了解多少？"><!---->7.CopyOnWriteArrayList了解多少？<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/collection.html#map" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="Map"><!---->Map<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/collection.html#_8-能说一下hashmap的数据结构吗" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="8.能说一下HashMap的数据结构吗？"><!---->8.能说一下HashMap的数据结构吗？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/collection.html#_9-你对红黑树了解多少-为什么不用二叉树-平衡树呢" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="9.你对红黑树了解多少？为什么不用二叉树/平衡树呢？"><!---->9.你对红黑树了解多少？为什么不用二叉树/平衡树呢？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/collection.html#_10-红黑树怎么保持平衡的知道吗" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="10.红黑树怎么保持平衡的知道吗？"><!---->10.红黑树怎么保持平衡的知道吗？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/collection.html#_11-hashmap的put流程知道吗" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="11.HashMap的put流程知道吗？"><!---->11.HashMap的put流程知道吗？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/collection.html#_12-hashmap怎么查找元素的呢" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="12.HashMap怎么查找元素的呢？"><!---->12.HashMap怎么查找元素的呢？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/collection.html#_13-hashmap的哈希-扰动函数是怎么设计的" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="13.HashMap的哈希/扰动函数是怎么设计的?"><!---->13.HashMap的哈希/扰动函数是怎么设计的?<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/collection.html#_14-为什么哈希-扰动函数能降hash碰撞" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="14.为什么哈希/扰动函数能降hash碰撞？"><!---->14.为什么哈希/扰动函数能降hash碰撞？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/collection.html#_15-为什么hashmap的容量是2的倍数呢" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="15.为什么HashMap的容量是2的倍数呢？"><!---->15.为什么HashMap的容量是2的倍数呢？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/collection.html#_16-如果初始化hashmap-传一个17的值new-hashmap-它会怎么处理" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="16.如果初始化HashMap，传一个17的值new HashMap&lt;&gt;，它会怎么处理？"><!---->16.如果初始化HashMap，传一个17的值new HashMap&lt;&gt;，它会怎么处理？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/collection.html#_17-你还知道哪些哈希函数的构造方法呢" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="17.你还知道哪些哈希函数的构造方法呢？"><!---->17.你还知道哪些哈希函数的构造方法呢？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/collection.html#_18-解决哈希冲突有哪些方法呢" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="18.解决哈希冲突有哪些方法呢？"><!---->18.解决哈希冲突有哪些方法呢？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/collection.html#_19-为什么hashmap链表转红黑树的阈值为8呢" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="19.为什么HashMap链表转红黑树的阈值为8呢？"><!---->19.为什么HashMap链表转红黑树的阈值为8呢？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/collection.html#_20-扩容在什么时候呢-为什么扩容因子是0-75" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="20.扩容在什么时候呢？为什么扩容因子是0.75？"><!---->20.扩容在什么时候呢？为什么扩容因子是0.75？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/collection.html#_21-那扩容机制了解吗" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="21.那扩容机制了解吗？"><!---->21.那扩容机制了解吗？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/collection.html#_22-jdk1-8对hashmap主要做了哪些优化呢-为什么" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="22.jdk1.8对HashMap主要做了哪些优化呢？为什么？"><!---->22.jdk1.8对HashMap主要做了哪些优化呢？为什么？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/collection.html#_23-你能自己设计实现一个hashmap吗" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="23.你能自己设计实现一个HashMap吗？"><!---->23.你能自己设计实现一个HashMap吗？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/collection.html#_24-hashmap-是线程安全的吗-多线程下会有什么问题" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="24.HashMap 是线程安全的吗？多线程下会有什么问题？"><!---->24.HashMap 是线程安全的吗？多线程下会有什么问题？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/collection.html#_25-有什么办法能解决hashmap线程不安全的问题呢" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="25.有什么办法能解决HashMap线程不安全的问题呢？"><!---->25.有什么办法能解决HashMap线程不安全的问题呢？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/collection.html#_26-能具体说一下concurrenthashmap的实现吗" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="26.能具体说一下ConcurrentHashmap的实现吗？"><!---->26.能具体说一下ConcurrentHashmap的实现吗？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/collection.html#_27-hashmap-内部节点是有序的吗" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="27.HashMap 内部节点是有序的吗？"><!---->27.HashMap 内部节点是有序的吗？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/collection.html#_28-讲讲-linkedhashmap-怎么实现有序的" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="28.讲讲 LinkedHashMap 怎么实现有序的？"><!---->28.讲讲 LinkedHashMap 怎么实现有序的？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/collection.html#_29-讲讲-treemap-怎么实现有序的" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="29.讲讲 TreeMap 怎么实现有序的？"><!---->29.讲讲 TreeMap 怎么实现有序的？<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/collection.html#set" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="Set"><!---->Set<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/collection.html#_30-讲讲hashset的底层实现" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="30.讲讲HashSet的底层实现？"><!---->30.讲讲HashSet的底层实现？<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li></ul><!--]--></li><li><!--[--><a href="/sidebar/sanfene/javathread.html" class="nav-link sidebar-link sidebar-page" aria-label="Java 并发编程"><!---->Java 并发编程<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/sidebar/sanfene/jvm.html" class="nav-link sidebar-link sidebar-page" aria-label="Java 虚拟机"><!---->Java 虚拟机<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/sidebar/sanfene/spring.html" class="nav-link sidebar-link sidebar-page" aria-label="Spring"><!---->Spring<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/sidebar/sanfene/redis.html" class="nav-link sidebar-link sidebar-page" aria-label="Redis"><!---->Redis<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/sidebar/sanfene/mybatis.html" class="nav-link sidebar-link sidebar-page" aria-label="MyBatis"><!---->MyBatis<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->面渣逆袭（Java 集合框架篇）必看👍</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月9日</span><meta property="datePublished" content="2022-03-09T04:47:34.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category3" role>面渣逆袭</li><meta property="articleSection" content="面渣逆袭"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 27 分钟</span><meta property="timeRequired" content="PT27M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/collection.html#引言" class="router-link-active router-link-exact-active toc-link level2">引言</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/collection.html#_1-说说有哪些常见集合" class="router-link-active router-link-exact-active toc-link level3">1.说说有哪些常见集合？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/collection.html#list" class="router-link-active router-link-exact-active toc-link level2">List</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/collection.html#_2-arraylist和linkedlist有什么区别" class="router-link-active router-link-exact-active toc-link level3">2.ArrayList和LinkedList有什么区别？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/collection.html#_3-arraylist的扩容机制了解吗" class="router-link-active router-link-exact-active toc-link level3">3.ArrayList的扩容机制了解吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/collection.html#_4-arraylist怎么序列化的知道吗-为什么用transient修饰数组" class="router-link-active router-link-exact-active toc-link level3">4.ArrayList怎么序列化的知道吗？ 为什么用transient修饰数组？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/collection.html#_5-快速失败-fail-fast-和安全失败-fail-safe-了解吗" class="router-link-active router-link-exact-active toc-link level3">5.快速失败(fail-fast)和安全失败(fail-safe)了解吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/collection.html#_6-有哪几种实现arraylist线程安全的方法" class="router-link-active router-link-exact-active toc-link level3">6.有哪几种实现ArrayList线程安全的方法？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/collection.html#_7-copyonwritearraylist了解多少" class="router-link-active router-link-exact-active toc-link level3">7.CopyOnWriteArrayList了解多少？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/collection.html#map" class="router-link-active router-link-exact-active toc-link level2">Map</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/collection.html#_8-能说一下hashmap的数据结构吗" class="router-link-active router-link-exact-active toc-link level3">8.能说一下HashMap的数据结构吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/collection.html#_9-你对红黑树了解多少-为什么不用二叉树-平衡树呢" class="router-link-active router-link-exact-active toc-link level3">9.你对红黑树了解多少？为什么不用二叉树/平衡树呢？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/collection.html#_10-红黑树怎么保持平衡的知道吗" class="router-link-active router-link-exact-active toc-link level3">10.红黑树怎么保持平衡的知道吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/collection.html#_11-hashmap的put流程知道吗" class="router-link-active router-link-exact-active toc-link level3">11.HashMap的put流程知道吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/collection.html#_12-hashmap怎么查找元素的呢" class="router-link-active router-link-exact-active toc-link level3">12.HashMap怎么查找元素的呢？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/collection.html#_13-hashmap的哈希-扰动函数是怎么设计的" class="router-link-active router-link-exact-active toc-link level3">13.HashMap的哈希/扰动函数是怎么设计的?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/collection.html#_14-为什么哈希-扰动函数能降hash碰撞" class="router-link-active router-link-exact-active toc-link level3">14.为什么哈希/扰动函数能降hash碰撞？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/collection.html#_15-为什么hashmap的容量是2的倍数呢" class="router-link-active router-link-exact-active toc-link level3">15.为什么HashMap的容量是2的倍数呢？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/collection.html#_16-如果初始化hashmap-传一个17的值new-hashmap-它会怎么处理" class="router-link-active router-link-exact-active toc-link level3">16.如果初始化HashMap，传一个17的值new HashMap&lt;&gt;，它会怎么处理？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/collection.html#_17-你还知道哪些哈希函数的构造方法呢" class="router-link-active router-link-exact-active toc-link level3">17.你还知道哪些哈希函数的构造方法呢？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/collection.html#_18-解决哈希冲突有哪些方法呢" class="router-link-active router-link-exact-active toc-link level3">18.解决哈希冲突有哪些方法呢？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/collection.html#_19-为什么hashmap链表转红黑树的阈值为8呢" class="router-link-active router-link-exact-active toc-link level3">19.为什么HashMap链表转红黑树的阈值为8呢？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/collection.html#_20-扩容在什么时候呢-为什么扩容因子是0-75" class="router-link-active router-link-exact-active toc-link level3">20.扩容在什么时候呢？为什么扩容因子是0.75？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/collection.html#_21-那扩容机制了解吗" class="router-link-active router-link-exact-active toc-link level3">21.那扩容机制了解吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/collection.html#_22-jdk1-8对hashmap主要做了哪些优化呢-为什么" class="router-link-active router-link-exact-active toc-link level3">22.jdk1.8对HashMap主要做了哪些优化呢？为什么？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/collection.html#_23-你能自己设计实现一个hashmap吗" class="router-link-active router-link-exact-active toc-link level3">23.你能自己设计实现一个HashMap吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/collection.html#_24-hashmap-是线程安全的吗-多线程下会有什么问题" class="router-link-active router-link-exact-active toc-link level3">24.HashMap 是线程安全的吗？多线程下会有什么问题？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/collection.html#_25-有什么办法能解决hashmap线程不安全的问题呢" class="router-link-active router-link-exact-active toc-link level3">25.有什么办法能解决HashMap线程不安全的问题呢？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/collection.html#_26-能具体说一下concurrenthashmap的实现吗" class="router-link-active router-link-exact-active toc-link level3">26.能具体说一下ConcurrentHashmap的实现吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/collection.html#_27-hashmap-内部节点是有序的吗" class="router-link-active router-link-exact-active toc-link level3">27.HashMap 内部节点是有序的吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/collection.html#_28-讲讲-linkedhashmap-怎么实现有序的" class="router-link-active router-link-exact-active toc-link level3">28.讲讲 LinkedHashMap 怎么实现有序的？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/collection.html#_29-讲讲-treemap-怎么实现有序的" class="router-link-active router-link-exact-active toc-link level3">29.讲讲 TreeMap 怎么实现有序的？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/collection.html#set" class="router-link-active router-link-exact-active toc-link level2">Set</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/collection.html#_30-讲讲hashset的底层实现" class="router-link-active router-link-exact-active toc-link level3">30.讲讲HashSet的底层实现？</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="面渣逆袭-java-集合框架篇-必看" tabindex="-1"><a class="header-anchor" href="#面渣逆袭-java-集合框架篇-必看" aria-hidden="true">#</a> 面渣逆袭（Java 集合框架篇）必看👍</h1><blockquote><p>图文详解 30 道Java集合框架面试高频题，这次吊打面试官，我觉得稳了（手动 dog）。整理：沉默王二，戳<a href="https://mp.weixin.qq.com/s/ptbM0EqlnCWeWm9VdSCDLg" target="_blank" rel="noopener noreferrer">转载链接<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，作者：三分恶，戳<a href="https://mp.weixin.qq.com/s/SHkQ7LEOT0itt4bXMoDBPw" target="_blank" rel="noopener noreferrer">原文链接<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>。</p></blockquote><h2 id="引言" tabindex="-1"><a class="header-anchor" href="#引言" aria-hidden="true">#</a> 引言</h2><h3 id="_1-说说有哪些常见集合" tabindex="-1"><a class="header-anchor" href="#_1-说说有哪些常见集合" aria-hidden="true">#</a> 1.说说有哪些常见集合？</h3><p>集合相关类和接口都在java.util中，主要分为3种：List（列表）、Map（映射）、Set(集)。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/collection-1.png" alt="Java集合主要关系"></p><p>其中<code>Collection</code>是集合<code>List</code>、<code>Set</code>的父接口，它主要有两个子接口：</p><ul><li><code>List</code>：存储的元素有序，可重复。</li><li><code>Set</code>：存储的元素不无序，不可重复。</li></ul><p><code>Map</code>是另外的接口，是键值对映射结构的集合。</p><h2 id="list" tabindex="-1"><a class="header-anchor" href="#list" aria-hidden="true">#</a> List</h2><p>List，也没啥好问的，但不排除面试官剑走偏锋，比如面试官也看了我这篇文章。</p><h3 id="_2-arraylist和linkedlist有什么区别" tabindex="-1"><a class="header-anchor" href="#_2-arraylist和linkedlist有什么区别" aria-hidden="true">#</a> 2.ArrayList和LinkedList有什么区别？</h3><p>**（1）**数据结构不同</p><ul><li>ArrayList基于数组实现</li><li>LinkedList基于双向链表实现</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/collection-2.png" alt="ArrayList和LinkedList的数据结构"></p><p><strong>（2）</strong> 多数情况下，ArrayList更利于查找，LinkedList更利于增删</p><ul><li><p>ArrayList基于数组实现，get(int index)可以直接通过数组下标获取，时间复杂度是O(1)；LinkedList基于链表实现，get(int index)需要遍历链表，时间复杂度是O(n)；当然，get(E element)这种查找，两种集合都需要遍历，时间复杂度都是O(n)。</p></li><li><p>ArrayList增删如果是数组末尾的位置，直接插入或者删除就可以了，但是如果插入中间的位置，就需要把插入位置后的元素都向前或者向后移动，甚至还有可能触发扩容；双向链表的插入和删除只需要改变前驱节点、后继节点和插入节点的指向就行了，不需要移动元素。</p></li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/collection-3.png" alt="ArrayList和LinkedList中间插入"></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/collection-4.png" alt="ArrayList和LinkedList中间删除"></p><blockquote><p>注意，这个地方可能会出陷阱，LinkedList更利于增删更多是体现在平均步长上，不是体现在时间复杂度上，二者增删的时间复杂度都是O(n)</p></blockquote><p>**（3）**是否支持随机访问</p><ul><li>ArrayList基于数组，所以它可以根据下标查找，支持随机访问，当然，它也实现了RandmoAccess 接口，这个接口只是用来标识是否支持随机访问。</li><li>LinkedList基于链表，所以它没法根据序号直接获取元素，它没有实现RandmoAccess 接口，标记不支持随机访问。</li></ul><p>**（4）**内存占用，ArrayList基于数组，是一块连续的内存空间，LinkedList基于链表，内存空间不连续，它们在空间占用上都有一些额外的消耗：</p><ul><li>ArrayList是预先定义好的数组，可能会有空的内存空间，存在一定空间浪费</li><li>LinkedList每个节点，需要存储前驱和后继，所以每个节点会占用更多的空间</li></ul><h3 id="_3-arraylist的扩容机制了解吗" tabindex="-1"><a class="header-anchor" href="#_3-arraylist的扩容机制了解吗" aria-hidden="true">#</a> 3.ArrayList的扩容机制了解吗？</h3><p>ArrayList是基于数组的集合，数组的容量是在定义的时候确定的，如果数组满了，再插入，就会数组溢出。所以在插入时候，会先检查是否需要扩容，如果当前容量+1超过数组长度，就会进行扩容。</p><p>ArrayList的扩容是创建一个<strong>1.5倍</strong>的新数组，然后把原数组的值拷贝过去。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/collection-5.png" alt="ArrayList扩容"></p><h3 id="_4-arraylist怎么序列化的知道吗-为什么用transient修饰数组" tabindex="-1"><a class="header-anchor" href="#_4-arraylist怎么序列化的知道吗-为什么用transient修饰数组" aria-hidden="true">#</a> 4.ArrayList怎么序列化的知道吗？ 为什么用transient修饰数组？</h3><p>ArrayList的序列化不太一样，它使用<code>transient</code>修饰存储元素的<code>elementData</code>的数组，<code>transient</code>关键字的作用是让被修饰的成员属性不被序列化。</p><p><strong>为什么最ArrayList不直接序列化元素数组呢？</strong></p><p>出于效率的考虑，数组可能长度100，但实际只用了50，剩下的50不用其实不用序列化，这样可以提高序列化和反序列化的效率，还可以节省内存空间。</p><p><strong>那ArrayList怎么序列化呢？</strong></p><p>ArrayList通过两个方法<strong>readObject、writeObject</strong>自定义序列化和反序列化策略，实际直接使用两个流<code>ObjectOutputStream</code>和<code>ObjectInputStream</code>来进行序列化和反序列化。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/collection-6.png" alt="ArrayList自定义序列化"></p><h3 id="_5-快速失败-fail-fast-和安全失败-fail-safe-了解吗" tabindex="-1"><a class="header-anchor" href="#_5-快速失败-fail-fast-和安全失败-fail-safe-了解吗" aria-hidden="true">#</a> 5.快速失败(fail-fast)和安全失败(fail-safe)了解吗？</h3><p><strong>快速失败（fail—fast）</strong>：快速失败是Java集合的一种错误检测机制</p><ul><li>在用迭代器遍历一个集合对象时，如果线程A遍历过程中，线程B对集合对象的内容进行了修改（增加、删除、修改），则会抛出Concurrent Modification Exception。</li><li>原理：迭代器在遍历时直接访问集合中的内容，并且在遍历过程中使用一个 <code> modCount</code> 变量。集合在被遍历期间如果内容发生变化，就会改变<code>modCount</code>的值。每当迭代器使用hashNext()/next()遍历下一个元素之前，都会检测modCount变量是否为expectedmodCount值，是的话就返回遍历；否则抛出异常，终止遍历。</li><li>注意：这里异常的抛出条件是检测到 modCount！=expectedmodCount 这个条件。如果集合发生变化时修改modCount值刚好又设置为了expectedmodCount值，则异常不会抛出。因此，不能依赖于这个异常是否抛出而进行并发操作的编程，这个异常只建议用于检测并发修改的bug。</li><li>场景：java.util包下的集合类都是快速失败的，不能在多线程下发生并发修改（迭代过程中被修改），比如ArrayList 类。</li></ul><p><strong>安全失败（fail—safe）</strong></p><ul><li>采用安全失败机制的集合容器，在遍历时不是直接在集合内容上访问的，而是先复制原有集合内容，在拷贝的集合上进行遍历。</li><li>原理：由于迭代时是对原集合的拷贝进行遍历，所以在遍历过程中对原集合所作的修改并不能被迭代器检测到，所以不会触发Concurrent Modification Exception。</li><li>缺点：基于拷贝内容的优点是避免了Concurrent Modification Exception，但同样地，迭代器并不能访问到修改后的内容，即：迭代器遍历的是开始遍历那一刻拿到的集合拷贝，在遍历期间原集合发生的修改迭代器是不知道的。</li><li>场景：java.util.concurrent包下的容器都是安全失败，可以在多线程下并发使用，并发修改，比如CopyOnWriteArrayList类。</li></ul><h3 id="_6-有哪几种实现arraylist线程安全的方法" tabindex="-1"><a class="header-anchor" href="#_6-有哪几种实现arraylist线程安全的方法" aria-hidden="true">#</a> 6.有哪几种实现ArrayList线程安全的方法？</h3><p>fail-fast是一种可能触发的机制，实际上，ArrayList的线程安全仍然没有保证，一般，保证ArrayList的线程安全可以通过这些方案：</p><ul><li>使用 Vector 代替 ArrayList。（不推荐，Vector是一个历史遗留类）</li><li>使用 Collections.synchronizedList 包装 ArrayList，然后操作包装后的 list。</li><li>使用 CopyOnWriteArrayList 代替 ArrayList。</li><li>在使用 ArrayList 时，应用程序通过同步机制去控制 ArrayList 的读写。</li></ul><h3 id="_7-copyonwritearraylist了解多少" tabindex="-1"><a class="header-anchor" href="#_7-copyonwritearraylist了解多少" aria-hidden="true">#</a> 7.CopyOnWriteArrayList了解多少？</h3><p>CopyOnWriteArrayList就是线程安全版本的ArrayList。</p><p>它的名字叫<code>CopyOnWrite</code>——写时复制，已经明示了它的原理。</p><p>CopyOnWriteArrayList采用了一种读写分离的并发策略。CopyOnWriteArrayList容器允许并发读，读操作是无锁的，性能较高。至于写操作，比如向容器中添加一个元素，则首先将当前容器复制一份，然后在新副本上执行写操作，结束之后再将原容器的引用指向新容器。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/collection-7.png" alt="CopyOnWriteArrayList原理"></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><h2 id="map" tabindex="-1"><a class="header-anchor" href="#map" aria-hidden="true">#</a> Map</h2><p>Map中，毫无疑问，最重要的就是HashMap，面试基本被盘出包浆了，各种问法，一定要好好准备。</p><h3 id="_8-能说一下hashmap的数据结构吗" tabindex="-1"><a class="header-anchor" href="#_8-能说一下hashmap的数据结构吗" aria-hidden="true">#</a> 8.能说一下HashMap的数据结构吗？</h3><p>JDK1.7的数据结构是<code>数组</code>+<code>链表</code>，JDK1.7还有人在用？不会吧……</p><p>说一下JDK1.8的数据结构吧：</p><p>JDK1.8的数据结构是<code>数组</code>+<code>链表</code>+<code>红黑树</code>。</p><p>数据结构示意图如下：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/collection-8.png" alt="jdk1.8 hashmap数据结构示意图"></p><p>其中，桶数组是用来存储数据元素，链表是用来解决冲突，红黑树是为了提高查询的效率。</p><ul><li>数据元素通过映射关系，也就是散列函数，映射到桶数组对应索引的位置</li><li>如果发生冲突，从冲突的位置拉一个链表，插入冲突的元素</li><li>如果链表长度&gt;8&amp;数组大小&gt;=64，链表转为红黑树</li><li>如果红黑树节点个数&lt;6 ，转为链表</li></ul><h3 id="_9-你对红黑树了解多少-为什么不用二叉树-平衡树呢" tabindex="-1"><a class="header-anchor" href="#_9-你对红黑树了解多少-为什么不用二叉树-平衡树呢" aria-hidden="true">#</a> 9.你对红黑树了解多少？为什么不用二叉树/平衡树呢？</h3><p>红黑树本质上是一种二叉查找树，为了保持平衡，它又在二叉查找树的基础上增加了一些规则：</p><ol><li>每个节点要么是红色，要么是黑色；</li><li>根节点永远是黑色的；</li><li>所有的叶子节点都是是黑色的（注意这里说叶子节点其实是图中的 NULL 节点）；</li><li>每个红色节点的两个子节点一定都是黑色；</li><li>从任一节点到其子树中每个叶子节点的路径都包含相同数量的黑色节点；</li></ol><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/collection-9.png" alt="红黑树"></p><blockquote><p>之所以不用二叉树：</p></blockquote><p>红黑树是一种平衡的二叉树，插入、删除、查找的最坏时间复杂度都为 O(logn)，避免了二叉树最坏情况下的O(n)时间复杂度。</p><blockquote><p>之所以不用平衡二叉树：</p></blockquote><p>平衡二叉树是比红黑树更严格的平衡树，为了保持保持平衡，需要旋转的次数更多，也就是说平衡二叉树保持平衡的效率更低，所以平衡二叉树插入和删除的效率比红黑树要低。</p><h3 id="_10-红黑树怎么保持平衡的知道吗" tabindex="-1"><a class="header-anchor" href="#_10-红黑树怎么保持平衡的知道吗" aria-hidden="true">#</a> 10.红黑树怎么保持平衡的知道吗？</h3><p>红黑树有两种方式保持平衡：<code>旋转</code>和<code>染色</code>。</p><ul><li>旋转：旋转分为两种，左旋和右旋</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/collection-10.png" alt="左旋"></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/collection-11.png" alt="右旋"></p><ul><li>染⾊：</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/collection-12.png" alt="染色"></p><h3 id="_11-hashmap的put流程知道吗" tabindex="-1"><a class="header-anchor" href="#_11-hashmap的put流程知道吗" aria-hidden="true">#</a> 11.HashMap的put流程知道吗？</h3><p>先上个流程图吧:</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/collection-13.jpg" alt="HashMap插入数据流程图"></p><ol><li><p>首先进行哈希值的扰动，获取一个新的哈希值。<code>(key == null) ? 0 : (h = key.hashCode()) ^ (h &gt;&gt;&gt; 16);</code></p></li><li><p>判断tab是否位空或者长度为0，如果是则进行扩容操作。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token punctuation">(</span>tab <span class="token operator">=</span> table<span class="token punctuation">)</span> <span class="token operator">==</span> <span class="token keyword">null</span> <span class="token operator">||</span> <span class="token punctuation">(</span>n <span class="token operator">=</span> tab<span class="token punctuation">.</span>length<span class="token punctuation">)</span> <span class="token operator">==</span> <span class="token number">0</span><span class="token punctuation">)</span>
     n <span class="token operator">=</span> <span class="token punctuation">(</span>tab <span class="token operator">=</span> <span class="token function">resize</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">.</span>length<span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div></li><li><p>根据哈希值计算下标，如果对应小标正好没有存放数据，则直接插入即可否则需要覆盖。<code>tab[i = (n - 1) &amp; hash])</code></p></li><li><p>判断tab[i]是否为树节点，否则向链表中插入数据，是则向树中插入节点。</p></li><li><p>如果链表中插入节点的时候，链表长度大于等于8，则需要把链表转换为红黑树。<code>treeifyBin(tab, hash);</code></p></li><li><p>最后所有元素处理完成后，判断是否超过阈值；<code>threshold</code>，超过则扩容。</p></li></ol><h3 id="_12-hashmap怎么查找元素的呢" tabindex="-1"><a class="header-anchor" href="#_12-hashmap怎么查找元素的呢" aria-hidden="true">#</a> 12.HashMap怎么查找元素的呢？</h3><p>先看流程图：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/collection-14.png" alt="HashMap查找流程图"></p><p>HashMap的查找就简单很多：</p><ol><li>使用扰动函数，获取新的哈希值</li><li>计算数组下标，获取节点</li><li>当前节点和key匹配，直接返回</li><li>否则，当前节点是否为树节点，查找红黑树</li><li>否则，遍历链表查找</li></ol><h3 id="_13-hashmap的哈希-扰动函数是怎么设计的" tabindex="-1"><a class="header-anchor" href="#_13-hashmap的哈希-扰动函数是怎么设计的" aria-hidden="true">#</a> 13.HashMap的哈希/扰动函数是怎么设计的?</h3><p>HashMap的哈希函数是先拿到 key 的hashcode，是一个32位的int类型的数值，然后让hashcode的高16位和低16位进行异或操作。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code>    <span class="token keyword">static</span> <span class="token keyword">final</span> <span class="token keyword">int</span> <span class="token function">hash</span><span class="token punctuation">(</span><span class="token class-name">Object</span> key<span class="token punctuation">)</span> <span class="token punctuation">{</span>
         <span class="token keyword">int</span> h<span class="token punctuation">;</span>
@@ -131,6 +131,6 @@
     <span class="token keyword">return</span> oldValue<span class="token punctuation">;</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><blockquote><p>图文详解 30 道Java集合框架面试高频题，这次吊打面试官，我觉得稳了（手动 dog）。整理：沉默王二，戳<a href="https://mp.weixin.qq.com/s/ptbM0EqlnCWeWm9VdSCDLg" target="_blank" rel="noopener noreferrer">转载链接<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，作者：三分恶，戳<a href="https://mp.weixin.qq.com/s/SHkQ7LEOT0itt4bXMoDBPw" target="_blank" rel="noopener noreferrer">原文链接<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>。</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/sidebar/sanfene/collection.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/14 上午7:14:28</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/sidebar/sanfene/javase.html" class="nav-link prev" aria-label="Java 基础"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->Java 基础</div></a><a href="/sidebar/sanfene/javathread.html" class="nav-link next" aria-label="Java 并发编程"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">Java 并发编程<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#java-概述" class="router-link-active router-link-exact-active toc-link level2">Java 概述</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_1-什么是-java" class="router-link-active router-link-exact-active toc-link level3">1.什么是 Java？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_2-java-语言有哪些特点" class="router-link-active router-link-exact-active toc-link level3">2.Java 语言有哪些特点？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_3-jvm、jdk-和-jre-有什么区别" class="router-link-active router-link-exact-active toc-link level3">3.JVM、JDK 和 JRE 有什么区别？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_4-说说什么是跨平台性-原理是什么" class="router-link-active router-link-exact-active toc-link level3">4.说说什么是跨平台性？原理是什么</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_5-什么是字节码-采用字节码的好处是什么" class="router-link-active router-link-exact-active toc-link level3">5.什么是字节码？采用字节码的好处是什么?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_6-为什么说-java-语言-编译与解释并存" class="router-link-active router-link-exact-active toc-link level3">6.为什么说 Java 语言“编译与解释并存”？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#基础语法" class="router-link-active router-link-exact-active toc-link level2">基础语法</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_7-java-有哪些数据类型" class="router-link-active router-link-exact-active toc-link level3">7.Java 有哪些数据类型？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_8-自动类型转换、强制类型转换-看看这几行代码" class="router-link-active router-link-exact-active toc-link level3">8.自动类型转换、强制类型转换？看看这几行代码？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_9-什么是自动拆箱-封箱" class="router-link-active router-link-exact-active toc-link level3">9.什么是自动拆箱/封箱？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_10-和-有什么区别" class="router-link-active router-link-exact-active toc-link level3">10.&amp;和&amp;&amp;有什么区别？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_11-switch-是否能作用在-byte-long-string-上" class="router-link-active router-link-exact-active toc-link level3">11.switch 是否能作用在 byte/long/String 上？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_12-break-continue-return-的区别及作用" class="router-link-active router-link-exact-active toc-link level3">12.break ,continue ,return 的区别及作用？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_13-用最有效率的方法计算-2-乘以-8" class="router-link-active router-link-exact-active toc-link level3">13.用最有效率的方法计算 2 乘以 8？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_14-说说自增自减运算-看下这几个代码运行结果" class="router-link-active router-link-exact-active toc-link level3">14.说说自增自减运算？看下这几个代码运行结果？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#面向对象" class="router-link-active router-link-exact-active toc-link level2">面向对象</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_15-面向对象和面向过程的区别" class="router-link-active router-link-exact-active toc-link level3">15.⾯向对象和⾯向过程的区别?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_16-面向对象有哪些特性" class="router-link-active router-link-exact-active toc-link level3">16.面向对象有哪些特性</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_17-重载-overload-和重写-override-的区别" class="router-link-active router-link-exact-active toc-link level3">17.重载（overload）和重写（override）的区别？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_18-访问修饰符-public、private、protected、以及不写-默认-时的区别" class="router-link-active router-link-exact-active toc-link level3">18.访问修饰符 public、private、protected、以及不写（默认）时的区别？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_19-this-关键字有什么作用" class="router-link-active router-link-exact-active toc-link level3">19.this 关键字有什么作用？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_20-抽象类-abstract-class-和接口-interface-有什么区别" class="router-link-active router-link-exact-active toc-link level3">20.抽象类(abstract class)和接口(interface)有什么区别？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_21-成员变量与局部变量的区别有哪些" class="router-link-active router-link-exact-active toc-link level3">21.成员变量与局部变量的区别有哪些？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_22-静态变量和实例变量的区别-静态方法、实例方法呢" class="router-link-active router-link-exact-active toc-link level3">22.静态变量和实例变量的区别？静态方法、实例方法呢？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_24-final-关键字有什么作用" class="router-link-active router-link-exact-active toc-link level3">24.final 关键字有什么作用？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_25-final、finally、finalize-的区别" class="router-link-active router-link-exact-active toc-link level3">25.final、finally、finalize 的区别？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_26-和-equals-的区别" class="router-link-active router-link-exact-active toc-link level3">26.==和 equals 的区别？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_27-hashcode-与-equals" class="router-link-active router-link-exact-active toc-link level3">27.hashCode 与 equals?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_28-java-是值传递-还是引用传递" class="router-link-active router-link-exact-active toc-link level3">28.Java 是值传递，还是引用传递？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_29-深拷贝和浅拷贝" class="router-link-active router-link-exact-active toc-link level3">29.深拷贝和浅拷贝?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_30-java-创建对象有哪几种方式" class="router-link-active router-link-exact-active toc-link level3">30.Java 创建对象有哪几种方式？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#string" class="router-link-active router-link-exact-active toc-link level2">String</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_31-string-是-java-基本数据类型吗-可以被继承吗" class="router-link-active router-link-exact-active toc-link level3">31.String 是 Java 基本数据类型吗？可以被继承吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_32-string-和-stringbuilder、stringbuffer-的区别" class="router-link-active router-link-exact-active toc-link level3">32.String 和 StringBuilder、StringBuffer 的区别？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_33-string-str1-new-string-abc-和-string-str2-abc-和-区别" class="router-link-active router-link-exact-active toc-link level3">33.String str1 = new String(&quot;abc&quot;)和 String str2 = &quot;abc&quot; 和 区别？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_34-string-不是不可变类吗-字符串拼接是如何实现的" class="router-link-active router-link-exact-active toc-link level3">34.String 不是不可变类吗？字符串拼接是如何实现的？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_35-intern-方法有什么作用" class="router-link-active router-link-exact-active toc-link level3">35.intern 方法有什么作用？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#integer" class="router-link-active router-link-exact-active toc-link level2">Integer</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_36-integer-a-127-integer-b-127-integer-c-128-integer-d-128-相等吗" class="router-link-active router-link-exact-active toc-link level3">36.Integer a= 127，Integer b = 127；Integer c= 128，Integer d = 128；，相等吗?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_37-string-怎么转成-integer-的-原理" class="router-link-active router-link-exact-active toc-link level3">37.String 怎么转成 Integer 的？原理？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#object" class="router-link-active router-link-exact-active toc-link level2">Object</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_38-object-类的常见方法" class="router-link-active router-link-exact-active toc-link level3">38.Object 类的常见方法?</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#异常处理" class="router-link-active router-link-exact-active toc-link level2">异常处理</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_39-java-中异常处理体系" class="router-link-active router-link-exact-active toc-link level3">39.Java 中异常处理体系?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_40-异常的处理方式" class="router-link-active router-link-exact-active toc-link level3">40.异常的处理方式？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_41-三道经典异常处理代码题" class="router-link-active router-link-exact-active toc-link level3">41.三道经典异常处理代码题</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#i-o" class="router-link-active router-link-exact-active toc-link level2">I/O</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_42-java-中-io-流分为几种" class="router-link-active router-link-exact-active toc-link level3">42.Java 中 IO 流分为几种?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_43-既然有了字节流-为什么还要有字符流" class="router-link-active router-link-exact-active toc-link level3">43.既然有了字节流,为什么还要有字符流?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_44-bio、nio、aio" class="router-link-active router-link-exact-active toc-link level3">44.BIO、NIO、AIO？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#序列化" class="router-link-active router-link-exact-active toc-link level2">序列化</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_45-什么是序列化-什么是反序列化" class="router-link-active router-link-exact-active toc-link level3">45.什么是序列化？什么是反序列化？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_46-说说有几种序列化方式" class="router-link-active router-link-exact-active toc-link level3">46.说说有几种序列化方式？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#泛型" class="router-link-active router-link-exact-active toc-link level2">泛型</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_47-java-泛型了解么-什么是类型擦除-介绍一下常用的通配符" class="router-link-active router-link-exact-active toc-link level3">47.Java 泛型了解么？什么是类型擦除？介绍一下常用的通配符？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#注解" class="router-link-active router-link-exact-active toc-link level2">注解</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_48-说一下你对注解的理解" class="router-link-active router-link-exact-active toc-link level3">48.说一下你对注解的理解？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#反射" class="router-link-active router-link-exact-active toc-link level2">反射</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_49-什么是反射-应用-原理" class="router-link-active router-link-exact-active toc-link level3">49.什么是反射？应用？原理？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#jdk1-8-新特性" class="router-link-active router-link-exact-active toc-link level2">JDK1.8 新特性</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_50-jdk1-8-都有哪些新特性" class="router-link-active router-link-exact-active toc-link level3">50.JDK1.8 都有哪些新特性？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_51-lambda-表达式了解多少" class="router-link-active router-link-exact-active toc-link level3">51.Lambda 表达式了解多少？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_52-optional-了解吗" class="router-link-active router-link-exact-active toc-link level3">52.Optional 了解吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_53-stream-流用过吗" class="router-link-active router-link-exact-active toc-link level3">53.Stream 流用过吗？</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="面渣逆袭-java-基础篇-必看" tabindex="-1"><a class="header-anchor" href="#面渣逆袭-java-基础篇-必看" aria-hidden="true">#</a> 面渣逆袭（Java 基础篇）必看👍</h1><blockquote><p>图文详解 53 道Java基础面试高频题，这次吊打面试官，我觉得稳了（手动 dog）。整理：沉默王二，戳<a href="https://mp.weixin.qq.com/s/t7EYyF0VGEg1rAZut9dwSw" target="_blank" rel="noopener noreferrer">转载链接<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，作者：三分恶，戳<a href="https://mp.weixin.qq.com/s/M-6RSRcRd3X93cR7VXpanw" target="_blank" rel="noopener noreferrer">原文链接<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>。</p></blockquote><h2 id="java-概述" tabindex="-1"><a class="header-anchor" href="#java-概述" aria-hidden="true">#</a> Java 概述</h2><h3 id="_1-什么是-java" tabindex="-1"><a class="header-anchor" href="#_1-什么是-java" aria-hidden="true">#</a> 1.什么是 Java？</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/javase-1.png" alt="下辈子还学Java"></p><p>PS：碎怂 Java，有啥好介绍的。哦，面试啊。</p><p>Java 是一门面向对象的编程语言，不仅吸收了 C++语言的各种优点，还摒弃了 C++里难以理解的多继承、指针等概念，因此 Java 语言具有功能强大和简单易用两个特征。Java 语言作为静态面向对象编程语言的优秀代表，极好地实现了面向对象理论，允许程序员以优雅的思维方式进行复杂的编程 。</p><h3 id="_2-java-语言有哪些特点" tabindex="-1"><a class="header-anchor" href="#_2-java-语言有哪些特点" aria-hidden="true">#</a> 2.Java 语言有哪些特点？</h3><p>Java 语言有很多优秀（可吹）的特点，以下几个是比较突出的：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/javase-2.png" alt="Java语言特点"></p><ul><li>面向对象（封装，继承，多态）；</li><li>平台无关性，平台无关性的具体表现在于，Java 是“一次编写，到处运行（Write Once，Run any Where）”的语言，因此采用 Java 语言编写的程序具有很好的可移植性，而保证这一点的正是 Java 的虚拟机机制。在引入虚拟机之后，Java 语言在不同的平台上运行不需要重新编译。</li><li>支持多线程。C++ 语言没有内置的多线程机制，因此必须调用操作系统的多线程功能来进行多线程程序设计，而 Java 语言却提供了多线程支持；</li><li>编译与解释并存；</li></ul><h3 id="_3-jvm、jdk-和-jre-有什么区别" tabindex="-1"><a class="header-anchor" href="#_3-jvm、jdk-和-jre-有什么区别" aria-hidden="true">#</a> 3.JVM、JDK 和 JRE 有什么区别？</h3><p><strong>JVM</strong>：Java Virtual Machine，Java 虚拟机，Java 程序运行在 Java 虚拟机上。针对不同系统的实现（Windows，Linux，macOS）不同的 JVM，因此 Java 语言可以实现跨平台。</p><p><strong>JRE</strong>： Java 运⾏时环境。它是运⾏已编译 Java 程序所需的所有内容的集合，包括 Java 虚拟机（JVM），Java 类库，Java 命令和其他的⼀些基础构件。但是，它不能⽤于创建新程序。</p><p><strong>JDK</strong>: Java Development Kit，它是功能⻬全的 Java SDK。它拥有 JRE 所拥有的⼀切，还有编译器（javac）和⼯具（如 javadoc 和 jdb）。它能够创建和编译程序。</p><p>简单来说，JDK 包含 JRE，JRE 包含 JVM。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/javase-3.png" alt="JDK、JRE、JVM关系"></p><h3 id="_4-说说什么是跨平台性-原理是什么" tabindex="-1"><a class="header-anchor" href="#_4-说说什么是跨平台性-原理是什么" aria-hidden="true">#</a> 4.说说什么是跨平台性？原理是什么</h3><p>所谓跨平台性，是指 Java 语言编写的程序，一次编译后，可以在多个系统平台上运行。</p><p>实现原理：Java 程序是通过 Java 虚拟机在系统平台上运行的，只要该系统可以安装相应的 Java 虚拟机，该系统就可以运行 java 程序。</p><h3 id="_5-什么是字节码-采用字节码的好处是什么" tabindex="-1"><a class="header-anchor" href="#_5-什么是字节码-采用字节码的好处是什么" aria-hidden="true">#</a> 5.什么是字节码？采用字节码的好处是什么?</h3><p>所谓的字节码，就是 Java 程序经过编译之类产生的.class 文件，字节码能够被虚拟机识别，从而实现 Java 程序的跨平台性。</p><p><strong>Java</strong> 程序从源代码到运行主要有三步：</p><ul><li><strong>编译</strong>：将我们的代码（.java）编译成虚拟机可以识别理解的字节码(.class)</li><li><strong>解释</strong>：虚拟机执行 Java 字节码，将字节码翻译成机器能识别的机器码</li><li><strong>执行</strong>：对应的机器执行二进制机器码</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/javase-4.png" alt="Java程序执行过程"></p><p>只需要把 Java 程序编译成 Java 虚拟机能识别的 Java 字节码，不同的平台安装对应的 Java 虚拟机，这样就可以可以实现 Java 语言的平台无关性。</p><h3 id="_6-为什么说-java-语言-编译与解释并存" tabindex="-1"><a class="header-anchor" href="#_6-为什么说-java-语言-编译与解释并存" aria-hidden="true">#</a> 6.为什么说 Java 语言“编译与解释并存”？</h3><p>高级编程语言按照程序的执行方式分为<strong>编译型</strong>和<strong>解释型</strong>两种。</p><p>简单来说，编译型语言是指编译器针对特定的操作系统将源代码一次性翻译成可被该平台执行的机器码；解释型语言是指解释器对源程序逐行解释成特定平台的机器码并立即执行。</p><p>比如，你想读一本外国的小说，你可以找一个翻译人员帮助你翻译，有两种选择方式，你可以先等翻译人员将全本的小说（也就是源码）都翻译成汉语，再去阅读，也可以让翻译人员翻译一段，你在旁边阅读一段，慢慢把书读完。</p><p>Java 语言既具有编译型语言的特征，也具有解释型语言的特征，因为 Java 程序要经过先编译，后解释两个步骤，由 Java 编写的程序需要先经过编译步骤，生成字节码（<code>\*.class</code> 文件），这种字节码必须再经过 JVM，解释成操作系统能识别的机器码，在由操作系统执行。因此，我们可以认为 Java 语言<strong>编译</strong>与<strong>解释</strong>并存。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/javase-5.png" alt="编译与解释"></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><h2 id="基础语法" tabindex="-1"><a class="header-anchor" href="#基础语法" aria-hidden="true">#</a> 基础语法</h2><h3 id="_7-java-有哪些数据类型" tabindex="-1"><a class="header-anchor" href="#_7-java-有哪些数据类型" aria-hidden="true">#</a> 7.Java 有哪些数据类型？</h3><p><b>定义：</b>Java 语言是强类型语言，对于每一种数据都定义了明确的具体的数据类型，在内存中分配了不同大小的内存空间。</p><p>Java 语言数据类型分为两种：<strong>基本数据类型</strong>和<strong>引用数据类型</strong>。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/javase-6.png" alt="Java数据类型"></p><p><b>基本数据类型：</b></p><ul><li>数值型 <ul><li>整数类型（byte、short、int、long）</li><li>浮点类型（float、double）</li></ul></li><li>字符型（char）</li><li>布尔型（boolean）</li></ul><p>Java 基本数据类型范围和默认值：</p><table><thead><tr><th>基本类型</th><th>位数</th><th>字节</th><th>默认值</th></tr></thead><tbody><tr><td><code>int</code></td><td>32</td><td>4</td><td>0</td></tr><tr><td><code>short</code></td><td>16</td><td>2</td><td>0</td></tr><tr><td><code>long</code></td><td>64</td><td>8</td><td>0L</td></tr><tr><td><code>byte</code></td><td>8</td><td>1</td><td>0</td></tr><tr><td><code>char</code></td><td>16</td><td>2</td><td>&#39;u0000&#39;</td></tr><tr><td><code>float</code></td><td>32</td><td>4</td><td>0f</td></tr><tr><td><code>double</code></td><td>64</td><td>8</td><td>0d</td></tr><tr><td><code>boolean</code></td><td>1</td><td></td><td>false</td></tr></tbody></table><p><strong>引用数据类型：</strong></p><ul><li>类（class）</li><li>接口（interface）</li><li>数组([])</li></ul><h3 id="_8-自动类型转换、强制类型转换-看看这几行代码" tabindex="-1"><a class="header-anchor" href="#_8-自动类型转换、强制类型转换-看看这几行代码" aria-hidden="true">#</a> 8.自动类型转换、强制类型转换？看看这几行代码？</h3><p>Java 所有的数值型变量可以相互转换，当把一个表数范围小的数值或变量直接赋给另一个表数范围大的变量时，可以进行自动类型转换；反之，需要强制转换。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/javase-7.png" alt="Java自动类型转换方向"></p><p>这就好像，小杯里的水倒进大杯没问题，但大杯的水倒进小杯就不行了，可能会溢出。</p><blockquote><p><code>float f=3.4</code>，对吗？</p></blockquote><p>不正确。3.4 是单精度数，将双精度型（double）赋值给浮点型（float）属于下转型（down-casting，也称为窄化）会造成精度损失，因此需要强制类型转换<code>float f =(float)3.4;</code>或者写成<code>float f =3.4F</code></p><blockquote><p><code>short s1 = 1; s1 = s1 + 1；</code>对吗？<code>short s1 = 1; s1 += 1;</code>对吗？</p></blockquote><p>对于 short s1 = 1; s1 = s1 + 1;编译出错，由于 1 是 int 类型，因此 s1+1 运算结果也是 int 型，需要强制转换类型才能赋值给 short 型。</p><p>而 short s1 = 1; s1 += 1;可以正确编译，因为 s1+= 1;相当于 s1 = (short(s1 + 1);其中有隐含的强制类型转换。</p><h3 id="_9-什么是自动拆箱-封箱" tabindex="-1"><a class="header-anchor" href="#_9-什么是自动拆箱-封箱" aria-hidden="true">#</a> 9.什么是自动拆箱/封箱？</h3><ul><li><strong>装箱</strong>：将基本类型用它们对应的引用类型包装起来；</li><li><strong>拆箱</strong>：将包装类型转换为基本数据类型；</li></ul><p>Java 可以自动对基本数据类型和它们的包装类进行装箱和拆箱。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/javase-8.png" alt="装箱和拆箱"></p><p>举例：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">Integer</span> i <span class="token operator">=</span> <span class="token number">10</span><span class="token punctuation">;</span>  <span class="token comment">//装箱</span>
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class="nav-link sidebar-link sidebar-page" aria-label="MyBatis"><!---->MyBatis<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->面渣逆袭（Java 基础篇）必看👍</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener 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14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 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href="/sidebar/sanfene/javase.html#_13-用最有效率的方法计算-2-乘以-8" class="router-link-active router-link-exact-active toc-link level3">13.用最有效率的方法计算 2 乘以 8？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_14-说说自增自减运算-看下这几个代码运行结果" class="router-link-active router-link-exact-active toc-link level3">14.说说自增自减运算？看下这几个代码运行结果？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#面向对象" class="router-link-active router-link-exact-active toc-link level2">面向对象</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_15-面向对象和面向过程的区别" class="router-link-active router-link-exact-active toc-link level3">15.⾯向对象和⾯向过程的区别?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_16-面向对象有哪些特性" class="router-link-active router-link-exact-active toc-link level3">16.面向对象有哪些特性</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_17-重载-overload-和重写-override-的区别" class="router-link-active router-link-exact-active toc-link level3">17.重载（overload）和重写（override）的区别？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_18-访问修饰符-public、private、protected、以及不写-默认-时的区别" class="router-link-active router-link-exact-active toc-link level3">18.访问修饰符 public、private、protected、以及不写（默认）时的区别？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_19-this-关键字有什么作用" class="router-link-active router-link-exact-active toc-link level3">19.this 关键字有什么作用？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_20-抽象类-abstract-class-和接口-interface-有什么区别" class="router-link-active router-link-exact-active toc-link level3">20.抽象类(abstract class)和接口(interface)有什么区别？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_21-成员变量与局部变量的区别有哪些" class="router-link-active router-link-exact-active toc-link level3">21.成员变量与局部变量的区别有哪些？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_22-静态变量和实例变量的区别-静态方法、实例方法呢" class="router-link-active router-link-exact-active toc-link level3">22.静态变量和实例变量的区别？静态方法、实例方法呢？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_24-final-关键字有什么作用" class="router-link-active router-link-exact-active toc-link level3">24.final 关键字有什么作用？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_25-final、finally、finalize-的区别" class="router-link-active router-link-exact-active toc-link level3">25.final、finally、finalize 的区别？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_26-和-equals-的区别" class="router-link-active router-link-exact-active toc-link level3">26.==和 equals 的区别？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_27-hashcode-与-equals" class="router-link-active router-link-exact-active toc-link level3">27.hashCode 与 equals?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_28-java-是值传递-还是引用传递" class="router-link-active router-link-exact-active toc-link level3">28.Java 是值传递，还是引用传递？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_29-深拷贝和浅拷贝" class="router-link-active router-link-exact-active toc-link level3">29.深拷贝和浅拷贝?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_30-java-创建对象有哪几种方式" class="router-link-active router-link-exact-active toc-link level3">30.Java 创建对象有哪几种方式？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#string" class="router-link-active router-link-exact-active toc-link level2">String</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_31-string-是-java-基本数据类型吗-可以被继承吗" class="router-link-active router-link-exact-active toc-link level3">31.String 是 Java 基本数据类型吗？可以被继承吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_32-string-和-stringbuilder、stringbuffer-的区别" class="router-link-active router-link-exact-active toc-link level3">32.String 和 StringBuilder、StringBuffer 的区别？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_33-string-str1-new-string-abc-和-string-str2-abc-和-区别" class="router-link-active router-link-exact-active toc-link level3">33.String str1 = new String(&quot;abc&quot;)和 String str2 = &quot;abc&quot; 和 区别？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_34-string-不是不可变类吗-字符串拼接是如何实现的" class="router-link-active router-link-exact-active toc-link level3">34.String 不是不可变类吗？字符串拼接是如何实现的？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_35-intern-方法有什么作用" class="router-link-active router-link-exact-active toc-link level3">35.intern 方法有什么作用？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#integer" class="router-link-active router-link-exact-active toc-link level2">Integer</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_36-integer-a-127-integer-b-127-integer-c-128-integer-d-128-相等吗" class="router-link-active router-link-exact-active toc-link level3">36.Integer a= 127，Integer b = 127；Integer c= 128，Integer d = 128；，相等吗?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_37-string-怎么转成-integer-的-原理" class="router-link-active router-link-exact-active toc-link level3">37.String 怎么转成 Integer 的？原理？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#object" class="router-link-active router-link-exact-active toc-link level2">Object</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_38-object-类的常见方法" class="router-link-active router-link-exact-active toc-link level3">38.Object 类的常见方法?</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#异常处理" class="router-link-active router-link-exact-active toc-link level2">异常处理</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_39-java-中异常处理体系" class="router-link-active router-link-exact-active toc-link level3">39.Java 中异常处理体系?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_40-异常的处理方式" class="router-link-active router-link-exact-active toc-link level3">40.异常的处理方式？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_41-三道经典异常处理代码题" class="router-link-active router-link-exact-active toc-link level3">41.三道经典异常处理代码题</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#i-o" class="router-link-active router-link-exact-active toc-link level2">I/O</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_42-java-中-io-流分为几种" class="router-link-active router-link-exact-active toc-link level3">42.Java 中 IO 流分为几种?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_43-既然有了字节流-为什么还要有字符流" class="router-link-active router-link-exact-active toc-link level3">43.既然有了字节流,为什么还要有字符流?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_44-bio、nio、aio" class="router-link-active router-link-exact-active toc-link level3">44.BIO、NIO、AIO？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#序列化" class="router-link-active router-link-exact-active toc-link level2">序列化</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_45-什么是序列化-什么是反序列化" class="router-link-active router-link-exact-active toc-link level3">45.什么是序列化？什么是反序列化？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_46-说说有几种序列化方式" class="router-link-active router-link-exact-active toc-link level3">46.说说有几种序列化方式？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#泛型" class="router-link-active router-link-exact-active toc-link level2">泛型</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_47-java-泛型了解么-什么是类型擦除-介绍一下常用的通配符" class="router-link-active router-link-exact-active toc-link level3">47.Java 泛型了解么？什么是类型擦除？介绍一下常用的通配符？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#注解" class="router-link-active router-link-exact-active toc-link level2">注解</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_48-说一下你对注解的理解" class="router-link-active router-link-exact-active toc-link level3">48.说一下你对注解的理解？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#反射" class="router-link-active router-link-exact-active toc-link level2">反射</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_49-什么是反射-应用-原理" class="router-link-active router-link-exact-active toc-link level3">49.什么是反射？应用？原理？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#jdk1-8-新特性" class="router-link-active router-link-exact-active toc-link level2">JDK1.8 新特性</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_50-jdk1-8-都有哪些新特性" class="router-link-active router-link-exact-active toc-link level3">50.JDK1.8 都有哪些新特性？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_51-lambda-表达式了解多少" class="router-link-active router-link-exact-active toc-link level3">51.Lambda 表达式了解多少？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_52-optional-了解吗" class="router-link-active router-link-exact-active toc-link level3">52.Optional 了解吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javase.html#_53-stream-流用过吗" class="router-link-active router-link-exact-active toc-link level3">53.Stream 流用过吗？</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="面渣逆袭-java-基础篇-必看" tabindex="-1"><a class="header-anchor" href="#面渣逆袭-java-基础篇-必看" aria-hidden="true">#</a> 面渣逆袭（Java 基础篇）必看👍</h1><blockquote><p>图文详解 53 道Java基础面试高频题，这次吊打面试官，我觉得稳了（手动 dog）。整理：沉默王二，戳<a href="https://mp.weixin.qq.com/s/t7EYyF0VGEg1rAZut9dwSw" target="_blank" rel="noopener noreferrer">转载链接<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，作者：三分恶，戳<a href="https://mp.weixin.qq.com/s/M-6RSRcRd3X93cR7VXpanw" target="_blank" rel="noopener noreferrer">原文链接<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>。</p></blockquote><h2 id="java-概述" tabindex="-1"><a class="header-anchor" href="#java-概述" aria-hidden="true">#</a> Java 概述</h2><h3 id="_1-什么是-java" tabindex="-1"><a class="header-anchor" href="#_1-什么是-java" aria-hidden="true">#</a> 1.什么是 Java？</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/javase-1.png" alt="下辈子还学Java"></p><p>PS：碎怂 Java，有啥好介绍的。哦，面试啊。</p><p>Java 是一门面向对象的编程语言，不仅吸收了 C++语言的各种优点，还摒弃了 C++里难以理解的多继承、指针等概念，因此 Java 语言具有功能强大和简单易用两个特征。Java 语言作为静态面向对象编程语言的优秀代表，极好地实现了面向对象理论，允许程序员以优雅的思维方式进行复杂的编程 。</p><h3 id="_2-java-语言有哪些特点" tabindex="-1"><a class="header-anchor" href="#_2-java-语言有哪些特点" aria-hidden="true">#</a> 2.Java 语言有哪些特点？</h3><p>Java 语言有很多优秀（可吹）的特点，以下几个是比较突出的：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/javase-2.png" alt="Java语言特点"></p><ul><li>面向对象（封装，继承，多态）；</li><li>平台无关性，平台无关性的具体表现在于，Java 是“一次编写，到处运行（Write Once，Run any Where）”的语言，因此采用 Java 语言编写的程序具有很好的可移植性，而保证这一点的正是 Java 的虚拟机机制。在引入虚拟机之后，Java 语言在不同的平台上运行不需要重新编译。</li><li>支持多线程。C++ 语言没有内置的多线程机制，因此必须调用操作系统的多线程功能来进行多线程程序设计，而 Java 语言却提供了多线程支持；</li><li>编译与解释并存；</li></ul><h3 id="_3-jvm、jdk-和-jre-有什么区别" tabindex="-1"><a class="header-anchor" href="#_3-jvm、jdk-和-jre-有什么区别" aria-hidden="true">#</a> 3.JVM、JDK 和 JRE 有什么区别？</h3><p><strong>JVM</strong>：Java Virtual Machine，Java 虚拟机，Java 程序运行在 Java 虚拟机上。针对不同系统的实现（Windows，Linux，macOS）不同的 JVM，因此 Java 语言可以实现跨平台。</p><p><strong>JRE</strong>： Java 运⾏时环境。它是运⾏已编译 Java 程序所需的所有内容的集合，包括 Java 虚拟机（JVM），Java 类库，Java 命令和其他的⼀些基础构件。但是，它不能⽤于创建新程序。</p><p><strong>JDK</strong>: Java Development Kit，它是功能⻬全的 Java SDK。它拥有 JRE 所拥有的⼀切，还有编译器（javac）和⼯具（如 javadoc 和 jdb）。它能够创建和编译程序。</p><p>简单来说，JDK 包含 JRE，JRE 包含 JVM。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/javase-3.png" alt="JDK、JRE、JVM关系"></p><h3 id="_4-说说什么是跨平台性-原理是什么" tabindex="-1"><a class="header-anchor" href="#_4-说说什么是跨平台性-原理是什么" aria-hidden="true">#</a> 4.说说什么是跨平台性？原理是什么</h3><p>所谓跨平台性，是指 Java 语言编写的程序，一次编译后，可以在多个系统平台上运行。</p><p>实现原理：Java 程序是通过 Java 虚拟机在系统平台上运行的，只要该系统可以安装相应的 Java 虚拟机，该系统就可以运行 java 程序。</p><h3 id="_5-什么是字节码-采用字节码的好处是什么" tabindex="-1"><a class="header-anchor" href="#_5-什么是字节码-采用字节码的好处是什么" aria-hidden="true">#</a> 5.什么是字节码？采用字节码的好处是什么?</h3><p>所谓的字节码，就是 Java 程序经过编译之类产生的.class 文件，字节码能够被虚拟机识别，从而实现 Java 程序的跨平台性。</p><p><strong>Java</strong> 程序从源代码到运行主要有三步：</p><ul><li><strong>编译</strong>：将我们的代码（.java）编译成虚拟机可以识别理解的字节码(.class)</li><li><strong>解释</strong>：虚拟机执行 Java 字节码，将字节码翻译成机器能识别的机器码</li><li><strong>执行</strong>：对应的机器执行二进制机器码</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/javase-4.png" alt="Java程序执行过程"></p><p>只需要把 Java 程序编译成 Java 虚拟机能识别的 Java 字节码，不同的平台安装对应的 Java 虚拟机，这样就可以可以实现 Java 语言的平台无关性。</p><h3 id="_6-为什么说-java-语言-编译与解释并存" tabindex="-1"><a class="header-anchor" href="#_6-为什么说-java-语言-编译与解释并存" aria-hidden="true">#</a> 6.为什么说 Java 语言“编译与解释并存”？</h3><p>高级编程语言按照程序的执行方式分为<strong>编译型</strong>和<strong>解释型</strong>两种。</p><p>简单来说，编译型语言是指编译器针对特定的操作系统将源代码一次性翻译成可被该平台执行的机器码；解释型语言是指解释器对源程序逐行解释成特定平台的机器码并立即执行。</p><p>比如，你想读一本外国的小说，你可以找一个翻译人员帮助你翻译，有两种选择方式，你可以先等翻译人员将全本的小说（也就是源码）都翻译成汉语，再去阅读，也可以让翻译人员翻译一段，你在旁边阅读一段，慢慢把书读完。</p><p>Java 语言既具有编译型语言的特征，也具有解释型语言的特征，因为 Java 程序要经过先编译，后解释两个步骤，由 Java 编写的程序需要先经过编译步骤，生成字节码（<code>\*.class</code> 文件），这种字节码必须再经过 JVM，解释成操作系统能识别的机器码，在由操作系统执行。因此，我们可以认为 Java 语言<strong>编译</strong>与<strong>解释</strong>并存。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/javase-5.png" alt="编译与解释"></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><h2 id="基础语法" tabindex="-1"><a class="header-anchor" href="#基础语法" aria-hidden="true">#</a> 基础语法</h2><h3 id="_7-java-有哪些数据类型" tabindex="-1"><a class="header-anchor" href="#_7-java-有哪些数据类型" aria-hidden="true">#</a> 7.Java 有哪些数据类型？</h3><p><b>定义：</b>Java 语言是强类型语言，对于每一种数据都定义了明确的具体的数据类型，在内存中分配了不同大小的内存空间。</p><p>Java 语言数据类型分为两种：<strong>基本数据类型</strong>和<strong>引用数据类型</strong>。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/javase-6.png" alt="Java数据类型"></p><p><b>基本数据类型：</b></p><ul><li>数值型 <ul><li>整数类型（byte、short、int、long）</li><li>浮点类型（float、double）</li></ul></li><li>字符型（char）</li><li>布尔型（boolean）</li></ul><p>Java 基本数据类型范围和默认值：</p><table><thead><tr><th>基本类型</th><th>位数</th><th>字节</th><th>默认值</th></tr></thead><tbody><tr><td><code>int</code></td><td>32</td><td>4</td><td>0</td></tr><tr><td><code>short</code></td><td>16</td><td>2</td><td>0</td></tr><tr><td><code>long</code></td><td>64</td><td>8</td><td>0L</td></tr><tr><td><code>byte</code></td><td>8</td><td>1</td><td>0</td></tr><tr><td><code>char</code></td><td>16</td><td>2</td><td>&#39;u0000&#39;</td></tr><tr><td><code>float</code></td><td>32</td><td>4</td><td>0f</td></tr><tr><td><code>double</code></td><td>64</td><td>8</td><td>0d</td></tr><tr><td><code>boolean</code></td><td>1</td><td></td><td>false</td></tr></tbody></table><p><strong>引用数据类型：</strong></p><ul><li>类（class）</li><li>接口（interface）</li><li>数组([])</li></ul><h3 id="_8-自动类型转换、强制类型转换-看看这几行代码" tabindex="-1"><a class="header-anchor" href="#_8-自动类型转换、强制类型转换-看看这几行代码" aria-hidden="true">#</a> 8.自动类型转换、强制类型转换？看看这几行代码？</h3><p>Java 所有的数值型变量可以相互转换，当把一个表数范围小的数值或变量直接赋给另一个表数范围大的变量时，可以进行自动类型转换；反之，需要强制转换。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/javase-7.png" alt="Java自动类型转换方向"></p><p>这就好像，小杯里的水倒进大杯没问题，但大杯的水倒进小杯就不行了，可能会溢出。</p><blockquote><p><code>float f=3.4</code>，对吗？</p></blockquote><p>不正确。3.4 是单精度数，将双精度型（double）赋值给浮点型（float）属于下转型（down-casting，也称为窄化）会造成精度损失，因此需要强制类型转换<code>float f =(float)3.4;</code>或者写成<code>float f =3.4F</code></p><blockquote><p><code>short s1 = 1; s1 = s1 + 1；</code>对吗？<code>short s1 = 1; s1 += 1;</code>对吗？</p></blockquote><p>对于 short s1 = 1; s1 = s1 + 1;编译出错，由于 1 是 int 类型，因此 s1+1 运算结果也是 int 型，需要强制转换类型才能赋值给 short 型。</p><p>而 short s1 = 1; s1 += 1;可以正确编译，因为 s1+= 1;相当于 s1 = (short(s1 + 1);其中有隐含的强制类型转换。</p><h3 id="_9-什么是自动拆箱-封箱" tabindex="-1"><a class="header-anchor" href="#_9-什么是自动拆箱-封箱" aria-hidden="true">#</a> 9.什么是自动拆箱/封箱？</h3><ul><li><strong>装箱</strong>：将基本类型用它们对应的引用类型包装起来；</li><li><strong>拆箱</strong>：将包装类型转换为基本数据类型；</li></ul><p>Java 可以自动对基本数据类型和它们的包装类进行装箱和拆箱。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/javase-8.png" alt="装箱和拆箱"></p><p>举例：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">Integer</span> i <span class="token operator">=</span> <span class="token number">10</span><span class="token punctuation">;</span>  <span class="token comment">//装箱</span>
 <span class="token keyword">int</span> n <span class="token operator">=</span> i<span class="token punctuation">;</span>   <span class="token comment">//拆箱</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="_10-和-有什么区别" tabindex="-1"><a class="header-anchor" href="#_10-和-有什么区别" aria-hidden="true">#</a> 10.&amp;和&amp;&amp;有什么区别？</h3><p>&amp;运算符有两种用法：<code>短路与</code>、<code>逻辑与</code>。</p><p>&amp;&amp;运算符是短路与运算。逻辑与跟短路与的差别是非常巨大的，虽然二者都要求运算符左右两端的布尔值都是 true 整个表达式的值才是 true。</p><p>&amp;&amp;之所以称为短路运算是因为，如果&amp;&amp;左边的表达式的值是 false，右边的表达式会被直接短路掉，不会进行运算。很多时候我们可能都需要用&amp;&amp;而不是&amp;。</p><p>例如在验证用户登录时判定用户名不是 null 而且不是空字符串，应当写为<code>username != null &amp;&amp;!username.equals(&quot;&quot;)</code>，二者的顺序不能交换，更不能用&amp;运算符，因为第一个条件如果不成立，根本不能进行字符串的 equals 比较，否则会产生 NullPointerException 异常。</p><p><strong>注意</strong>：逻辑或运算符（|）和短路或运算符（||）的差别也是如此。</p><h3 id="_11-switch-是否能作用在-byte-long-string-上" tabindex="-1"><a class="header-anchor" href="#_11-switch-是否能作用在-byte-long-string-上" aria-hidden="true">#</a> 11.switch 是否能作用在 byte/long/String 上？</h3><p>Java5 以前 switch(expr)中，expr 只能是 byte、short、char、int。</p><p>从 Java 5 开始，Java 中引入了枚举类型， expr 也可以是 enum 类型。</p><p>从 Java 7 开始，expr 还可以是字符串(String)，但是长整型(long)在目前所有的版本中都是不可以的。</p><h3 id="_12-break-continue-return-的区别及作用" tabindex="-1"><a class="header-anchor" href="#_12-break-continue-return-的区别及作用" aria-hidden="true">#</a> 12.break ,continue ,return 的区别及作用？</h3><ul><li>break 跳出整个循环，不再执行循环(<strong>结束当前的循环体</strong>)</li><li>continue 跳出本次循环，继续执行下次循环(<strong>结束正在执行的循环 进入下一个循环条件</strong>)</li><li>return 程序返回，不再执行下面的代码(<strong>结束当前的方法 直接返回</strong>)</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/javase-9.png" alt="break 、continue 、return"></p><h3 id="_13-用最有效率的方法计算-2-乘以-8" tabindex="-1"><a class="header-anchor" href="#_13-用最有效率的方法计算-2-乘以-8" aria-hidden="true">#</a> 13.用最有效率的方法计算 2 乘以 8？</h3><p>2 &lt;&lt; 3。<strong>位运算</strong>，数字的二进制位左移三位相当于乘以 2 的三次方。</p><h3 id="_14-说说自增自减运算-看下这几个代码运行结果" tabindex="-1"><a class="header-anchor" href="#_14-说说自增自减运算-看下这几个代码运行结果" aria-hidden="true">#</a> 14.说说自增自减运算？看下这几个代码运行结果？</h3><p>在写代码的过程中，常见的一种情况是需要某个整数类型变量增加 1 或减少 1，Java 提供了一种特殊的运算符，用于这种表达式，叫做自增运算符（++)和自减运算符（--）。</p><p>++和--运算符可以放在变量之前，也可以放在变量之后。</p><p>当运算符放在变量之前时(前缀)，先自增/减，再赋值；当运算符放在变量之后时(后缀)，先赋值，再自增/减。</p><p>例如，当 <code>b = ++a</code> 时，先自增（自己增加 1），再赋值（赋值给 b）；当 <code>b = a++</code> 时，先赋值(赋值给 b)，再自增（自己增加 1）。也就是，++a 输出的是 a+1 的值，a++输出的是 a 值。</p><p>用一句口诀就是：“符号在前就先加/减，符号在后就后加/减”。</p><blockquote><p>看一下这段代码运行结果？</p></blockquote><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">int</span> i  <span class="token operator">=</span> <span class="token number">1</span><span class="token punctuation">;</span>
 i <span class="token operator">=</span> i<span class="token operator">++</span><span class="token punctuation">;</span>
@@ -354,6 +354,6 @@ stringCollection<span class="token punctuation">.</span><span class="token funct
 reduced<span class="token punctuation">.</span><span class="token function">ifPresent</span><span class="token punctuation">(</span><span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token operator">::</span><span class="token function">println</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 <span class="token comment">// &quot;aaa1#aaa2#bbb1#bbb2#bbb3#ccc#ddd1#ddd2&quot;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>以上是常见的几种流式操作，还有其它的一些流式操作，可以帮助我们更便捷地处理集合数据。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/javase-38.png" alt="Java Stream流"></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><blockquote><p>图文详解 53 道Java基础面试高频题，这次吊打面试官，我觉得稳了（手动 dog）。整理：沉默王二，戳<a href="https://mp.weixin.qq.com/s/t7EYyF0VGEg1rAZut9dwSw" target="_blank" rel="noopener noreferrer">转载链接<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，作者：三分恶，戳<a href="https://mp.weixin.qq.com/s/M-6RSRcRd3X93cR7VXpanw" target="_blank" rel="noopener noreferrer">原文链接<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>。</p></blockquote></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/sidebar/sanfene/javase.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/6/6 下午11:31:27</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><!----><a href="/sidebar/sanfene/collection.html" class="nav-link next" aria-label="Java 集合框架"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">Java 集合框架<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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diff --git a/dist/sidebar/sanfene/javathread.html b/dist/sidebar/sanfene/javathread.html
index b8a854d4..ae446198 100644
--- a/dist/sidebar/sanfene/javathread.html
+++ b/dist/sidebar/sanfene/javathread.html
@@ -39,10 +39,10 @@
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aria-label="26.除了原子性，synchronized可见性，有序性，可重入性怎么实现？"><!---->26.除了原子性，synchronized可见性，有序性，可重入性怎么实现？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_27-锁升级-synchronized优化了解吗" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="27.锁升级？synchronized优化了解吗？"><!---->27.锁升级？synchronized优化了解吗？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_28-说说synchronized和reentrantlock的区别" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="28.说说synchronized和ReentrantLock的区别？"><!---->28.说说synchronized和ReentrantLock的区别？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_29-aqs了解多少" class="router-link-active router-link-exact-active nav-link 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aria-label="58.你能设计实现一个线程池吗？"><!---->58.你能设计实现一个线程池吗？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_59-单机线程池执行断电了应该怎么处理" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="59.单机线程池执行断电了应该怎么处理？"><!---->59.单机线程池执行断电了应该怎么处理？<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/javathread.html#并发容器和框架" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="并发容器和框架"><!---->并发容器和框架<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_60-fork-join框架了解吗" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="60.Fork/Join框架了解吗？"><!---->60.Fork/Join框架了解吗？<!----></a><ul 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80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 79 分钟</span><meta property="timeRequired" content="PT79M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#基础" class="router-link-active router-link-exact-active toc-link level2">基础</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_1-并行跟并发有什么区别" class="router-link-active router-link-exact-active toc-link level3">1.并行跟并发有什么区别？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_2-说说什么是进程和线程" class="router-link-active router-link-exact-active toc-link level3">2.说说什么是进程和线程？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_3-说说线程有几种创建方式" class="router-link-active router-link-exact-active toc-link level3">3.说说线程有几种创建方式？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_4-为什么调用start-方法时会执行run-方法-那怎么不直接调用run-方法" class="router-link-active router-link-exact-active toc-link level3">4.为什么调用start()方法时会执行run()方法，那怎么不直接调用run()方法？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_5-线程有哪些常用的调度方法" class="router-link-active router-link-exact-active toc-link level3">5.线程有哪些常用的调度方法？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_6-线程有几种状态" class="router-link-active router-link-exact-active toc-link level3">6.线程有几种状态？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_7-什么是线程上下文切换" class="router-link-active router-link-exact-active toc-link level3">7.什么是线程上下文切换？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_8-守护线程了解吗" class="router-link-active router-link-exact-active toc-link level3">8.守护线程了解吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_9-线程间有哪些通信方式" class="router-link-active router-link-exact-active toc-link level3">9.线程间有哪些通信方式？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#threadlocal" class="router-link-active router-link-exact-active toc-link level2">ThreadLocal</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_10-threadlocal是什么" class="router-link-active router-link-exact-active toc-link level3">10.ThreadLocal是什么？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_11-你在工作中用到过threadlocal吗" class="router-link-active router-link-exact-active toc-link level3">11.你在工作中用到过ThreadLocal吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_12-threadlocal怎么实现的呢" class="router-link-active router-link-exact-active toc-link level3">12.ThreadLocal怎么实现的呢？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_13-threadlocal-内存泄露是怎么回事" class="router-link-active router-link-exact-active toc-link level3">13.ThreadLocal 内存泄露是怎么回事？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_14-threadlocalmap的结构了解吗" class="router-link-active router-link-exact-active toc-link level3">14.ThreadLocalMap的结构了解吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_15-threadlocalmap怎么解决hash冲突的" class="router-link-active router-link-exact-active toc-link level3">15.ThreadLocalMap怎么解决Hash冲突的？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_16-threadlocalmap扩容机制了解吗" class="router-link-active router-link-exact-active toc-link level3">16.ThreadLocalMap扩容机制了解吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_17-父子线程怎么共享数据" class="router-link-active router-link-exact-active toc-link level3">17.父子线程怎么共享数据？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#java内存模型" class="router-link-active router-link-exact-active toc-link level2">Java内存模型</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_18-说一下你对java内存模型-jmm-的理解" class="router-link-active router-link-exact-active toc-link level3">18.说一下你对Java内存模型（JMM）的理解？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_19-说说你对原子性、可见性、有序性的理解" class="router-link-active router-link-exact-active toc-link level3">19.说说你对原子性、可见性、有序性的理解？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_20-那说说什么是指令重排" class="router-link-active router-link-exact-active toc-link level3">20.那说说什么是指令重排？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_21-指令重排有限制吗-happens-before了解吗" class="router-link-active router-link-exact-active toc-link level3">21.指令重排有限制吗？happens-before了解吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_22-as-if-serial又是什么-单线程的程序一定是顺序的吗" class="router-link-active router-link-exact-active toc-link level3">22.as-if-serial又是什么？单线程的程序一定是顺序的吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_23-volatile实现原理了解吗" class="router-link-active router-link-exact-active toc-link level3">23.volatile实现原理了解吗？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#锁" class="router-link-active router-link-exact-active toc-link level2">锁</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_24-synchronized用过吗-怎么使用" class="router-link-active router-link-exact-active toc-link level3">24.synchronized用过吗？怎么使用？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_25-synchronized的实现原理" class="router-link-active router-link-exact-active toc-link level3">25.synchronized的实现原理？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_26-除了原子性-synchronized可见性-有序性-可重入性怎么实现" class="router-link-active router-link-exact-active toc-link level3">26.除了原子性，synchronized可见性，有序性，可重入性怎么实现？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_27-锁升级-synchronized优化了解吗" class="router-link-active router-link-exact-active toc-link level3">27.锁升级？synchronized优化了解吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_28-说说synchronized和reentrantlock的区别" class="router-link-active router-link-exact-active toc-link level3">28.说说synchronized和ReentrantLock的区别？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_29-aqs了解多少" class="router-link-active router-link-exact-active toc-link level3">29.AQS了解多少？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_30-reentrantlock实现原理" class="router-link-active router-link-exact-active toc-link level3">30.ReentrantLock实现原理？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_31-reentrantlock怎么实现公平锁的" class="router-link-active router-link-exact-active toc-link level3">31.ReentrantLock怎么实现公平锁的？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_32-cas呢-cas了解多少" class="router-link-active router-link-exact-active toc-link level3">32.CAS呢？CAS了解多少？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_33-cas-有什么问题-如何解决" class="router-link-active router-link-exact-active toc-link level3">33.CAS 有什么问题？如何解决？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_34-java有哪些保证原子性的方法-如何保证多线程下i-结果正确" class="router-link-active router-link-exact-active toc-link level3">34.Java有哪些保证原子性的方法？如何保证多线程下i++ 结果正确？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_35-原子操作类了解多少" class="router-link-active router-link-exact-active toc-link level3">35.原子操作类了解多少？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_36-atomicinteger-的原理" class="router-link-active router-link-exact-active toc-link level3">36.AtomicInteger 的原理？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_37-线程死锁了解吗-该如何避免" class="router-link-active router-link-exact-active toc-link level3">37.线程死锁了解吗？该如何避免？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_38-那死锁问题怎么排查呢" class="router-link-active router-link-exact-active toc-link level3">38.那死锁问题怎么排查呢？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#并发工具类" class="router-link-active router-link-exact-active toc-link level2">并发工具类</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_39-countdownlatch-倒计数器-了解吗" class="router-link-active router-link-exact-active toc-link level3">39.CountDownLatch（倒计数器）了解吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_40-cyclicbarrier-同步屏障-了解吗" class="router-link-active router-link-exact-active toc-link level3">40.CyclicBarrier（同步屏障）了解吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_41-cyclicbarrier和countdownlatch有什么区别" class="router-link-active router-link-exact-active toc-link level3">41.CyclicBarrier和CountDownLatch有什么区别？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_42-semaphore-信号量-了解吗" class="router-link-active router-link-exact-active toc-link level3">42.Semaphore（信号量）了解吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_43-exchanger-了解吗" class="router-link-active router-link-exact-active toc-link level3">43.Exchanger 了解吗？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#线程池" class="router-link-active router-link-exact-active toc-link level2">线程池</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_44-什么是线程池" class="router-link-active router-link-exact-active toc-link level3">44.什么是线程池？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_45-能说说工作中线程池的应用吗" class="router-link-active router-link-exact-active toc-link level3">45.能说说工作中线程池的应用吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_46-能简单说一下线程池的工作流程吗" class="router-link-active router-link-exact-active toc-link level3">46.能简单说一下线程池的工作流程吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_47-线程池主要参数有哪些" class="router-link-active router-link-exact-active toc-link level3">47.线程池主要参数有哪些？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_48-线程池的拒绝策略有哪些" class="router-link-active router-link-exact-active toc-link level3">48.线程池的拒绝策略有哪些？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_49-线程池有哪几种工作队列" class="router-link-active router-link-exact-active toc-link level3">49.线程池有哪几种工作队列？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_50-线程池提交execute和submit有什么区别" class="router-link-active router-link-exact-active toc-link level3">50.线程池提交execute和submit有什么区别？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_51-线程池怎么关闭知道吗" class="router-link-active router-link-exact-active toc-link level3">51.线程池怎么关闭知道吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_52-线程池的线程数应该怎么配置" class="router-link-active router-link-exact-active toc-link level3">52.线程池的线程数应该怎么配置？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_53-有哪几种常见的线程池" class="router-link-active router-link-exact-active toc-link level3">53.有哪几种常见的线程池？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_54-能说一下四种常见线程池的原理吗" class="router-link-active router-link-exact-active toc-link level3">54.能说一下四种常见线程池的原理吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_55-线程池异常怎么处理知道吗" class="router-link-active router-link-exact-active toc-link level3">55.线程池异常怎么处理知道吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_56-能说一下线程池有几种状态吗" class="router-link-active router-link-exact-active toc-link level3">56.能说一下线程池有几种状态吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_57-线程池如何实现参数的动态修改" class="router-link-active router-link-exact-active toc-link level3">57.线程池如何实现参数的动态修改？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#线程池调优了解吗" class="router-link-active router-link-exact-active toc-link level3">线程池调优了解吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_58-你能设计实现一个线程池吗" class="router-link-active router-link-exact-active toc-link level3">58.你能设计实现一个线程池吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_59-单机线程池执行断电了应该怎么处理" class="router-link-active router-link-exact-active toc-link level3">59.单机线程池执行断电了应该怎么处理？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#并发容器和框架" class="router-link-active router-link-exact-active toc-link level2">并发容器和框架</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_60-fork-join框架了解吗" class="router-link-active router-link-exact-active toc-link level3">60.Fork/Join框架了解吗？</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="面渣逆袭-java-并发编程篇-必看" tabindex="-1"><a class="header-anchor" href="#面渣逆袭-java-并发编程篇-必看" aria-hidden="true">#</a> 面渣逆袭（Java 并发编程篇）必看👍</h1><blockquote><p>图文详解 60 道Java并发面试高频题，这次面试，一定吊打面试官，整理：沉默王二，戳<a href="https://mp.weixin.qq.com/s/bImCIoYsH_JEzTkBx2lj4A" target="_blank" rel="noopener noreferrer">转载链接<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，作者：三分恶，戳<a href="https://mp.weixin.qq.com/s/1jhBZrAb7bnvkgN1TgAUpw" target="_blank" rel="noopener noreferrer">原文链接<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>。</p></blockquote><h2 id="基础" tabindex="-1"><a class="header-anchor" href="#基础" aria-hidden="true">#</a> 基础</h2><h3 id="_1-并行跟并发有什么区别" tabindex="-1"><a class="header-anchor" href="#_1-并行跟并发有什么区别" aria-hidden="true">#</a> 1.并行跟并发有什么区别？</h3><p>从操作系统的角度来看，线程是CPU分配的最小单位。</p><ul><li>并行就是同一时刻，两个线程都在执行。这就要求有两个CPU去分别执行两个线程。</li><li>并发就是同一时刻，只有一个执行，但是一个时间段内，两个线程都执行了。并发的实现依赖于CPU切换线程，因为切换的时间特别短，所以基本对于用户是无感知的。</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/javathread-1.png" alt="并行和并发"></p><p>就好像我们去食堂打饭，并行就是我们在多个窗口排队，几个阿姨同时打菜；并发就是我们挤在一个窗口，阿姨给这个打一勺，又手忙脚乱地给那个打一勺。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/javathread-2.png" alt="并行并发和食堂打饭"></p><h3 id="_2-说说什么是进程和线程" tabindex="-1"><a class="header-anchor" href="#_2-说说什么是进程和线程" aria-hidden="true">#</a> 2.说说什么是进程和线程？</h3><p>要说线程，必须得先说说进程。</p><ul><li>进程：进程是代码在数据集合上的一次运行活动，是系统进行资源分配和调度的基本单位。</li><li>线程：线程是进程的一个执行路径，一个进程中至少有一个线程，进程中的多个线程共享进程的资源。</li></ul><p>操作系统在分配资源时是把资源分配给进程的， 但是 CPU 资源比较特殊，它是被分配到线程的，因为真正要占用CPU运行的是线程，所以也说线程是 CPU分配的基本单位。</p><p>比如在Java中，当我们启动 main 函数其实就启动了一个JVM进程，而 main 函数在的线程就是这个进程中的一个线程，也称主线程。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/javathread-3.png" alt="程序进程线程关系"></p><p>一个进程中有多个线程，多个线程共用进程的堆和方法区资源，但是每个线程有自己的程序计数器和栈。</p><h3 id="_3-说说线程有几种创建方式" tabindex="-1"><a class="header-anchor" href="#_3-说说线程有几种创建方式" aria-hidden="true">#</a> 3.说说线程有几种创建方式？</h3><p>Java中创建线程主要有三种方式，分别为继承Thread类、实现Runnable接口、实现Callable接口。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/javathread-4.png" alt="线程创建三种方式"></p><ul><li>继承Thread类，重写run()方法，调用start()方法启动线程</li></ul><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">ThreadTest</span> <span class="token punctuation">{</span>
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aria-label="5.线程有哪些常用的调度方法？"><!---->5.线程有哪些常用的调度方法？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_6-线程有几种状态" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="6.线程有几种状态？"><!---->6.线程有几种状态？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_7-什么是线程上下文切换" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="7.什么是线程上下文切换？"><!---->7.什么是线程上下文切换？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_8-守护线程了解吗" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="8.守护线程了解吗？"><!---->8.守护线程了解吗？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a 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href="/sidebar/sanfene/javathread.html#并发容器和框架" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="并发容器和框架"><!---->并发容器和框架<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_60-fork-join框架了解吗" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="60.Fork/Join框架了解吗？"><!---->60.Fork/Join框架了解吗？<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li></ul><!--]--></li><li><!--[--><a href="/sidebar/sanfene/jvm.html" class="nav-link sidebar-link sidebar-page" aria-label="Java 虚拟机"><!---->Java 虚拟机<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/sidebar/sanfene/spring.html" class="nav-link sidebar-link sidebar-page" aria-label="Spring"><!---->Spring<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/sidebar/sanfene/redis.html" class="nav-link sidebar-link sidebar-page" aria-label="Redis"><!---->Redis<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/sidebar/sanfene/mybatis.html" class="nav-link sidebar-link sidebar-page" aria-label="MyBatis"><!---->MyBatis<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->面渣逆袭（Java 并发编程篇）必看👍</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 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458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 79 分钟</span><meta property="timeRequired" content="PT79M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#基础" class="router-link-active router-link-exact-active toc-link level2">基础</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_1-并行跟并发有什么区别" class="router-link-active router-link-exact-active toc-link level3">1.并行跟并发有什么区别？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_2-说说什么是进程和线程" class="router-link-active router-link-exact-active toc-link level3">2.说说什么是进程和线程？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_3-说说线程有几种创建方式" class="router-link-active router-link-exact-active toc-link level3">3.说说线程有几种创建方式？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_4-为什么调用start-方法时会执行run-方法-那怎么不直接调用run-方法" class="router-link-active router-link-exact-active toc-link level3">4.为什么调用start()方法时会执行run()方法，那怎么不直接调用run()方法？</a></li><!----><!--]--><!--[--><li 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level3">9.线程间有哪些通信方式？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#threadlocal" class="router-link-active router-link-exact-active toc-link level2">ThreadLocal</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_10-threadlocal是什么" class="router-link-active router-link-exact-active toc-link level3">10.ThreadLocal是什么？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_11-你在工作中用到过threadlocal吗" class="router-link-active router-link-exact-active toc-link level3">11.你在工作中用到过ThreadLocal吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_12-threadlocal怎么实现的呢" class="router-link-active router-link-exact-active toc-link level3">12.ThreadLocal怎么实现的呢？</a></li><!----><!--]--><!--[--><li class="toc-item"><a 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class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_28-说说synchronized和reentrantlock的区别" class="router-link-active router-link-exact-active toc-link level3">28.说说synchronized和ReentrantLock的区别？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_29-aqs了解多少" class="router-link-active router-link-exact-active toc-link level3">29.AQS了解多少？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_30-reentrantlock实现原理" class="router-link-active router-link-exact-active toc-link level3">30.ReentrantLock实现原理？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_31-reentrantlock怎么实现公平锁的" class="router-link-active router-link-exact-active toc-link level3">31.ReentrantLock怎么实现公平锁的？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_32-cas呢-cas了解多少" class="router-link-active router-link-exact-active toc-link level3">32.CAS呢？CAS了解多少？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_33-cas-有什么问题-如何解决" class="router-link-active router-link-exact-active toc-link level3">33.CAS 有什么问题？如何解决？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_34-java有哪些保证原子性的方法-如何保证多线程下i-结果正确" class="router-link-active router-link-exact-active toc-link level3">34.Java有哪些保证原子性的方法？如何保证多线程下i++ 结果正确？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_35-原子操作类了解多少" class="router-link-active router-link-exact-active toc-link level3">35.原子操作类了解多少？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_36-atomicinteger-的原理" class="router-link-active router-link-exact-active toc-link level3">36.AtomicInteger 的原理？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_37-线程死锁了解吗-该如何避免" class="router-link-active router-link-exact-active toc-link level3">37.线程死锁了解吗？该如何避免？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_38-那死锁问题怎么排查呢" class="router-link-active router-link-exact-active toc-link level3">38.那死锁问题怎么排查呢？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#并发工具类" class="router-link-active router-link-exact-active toc-link level2">并发工具类</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_39-countdownlatch-倒计数器-了解吗" class="router-link-active router-link-exact-active toc-link level3">39.CountDownLatch（倒计数器）了解吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_40-cyclicbarrier-同步屏障-了解吗" class="router-link-active router-link-exact-active toc-link level3">40.CyclicBarrier（同步屏障）了解吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_41-cyclicbarrier和countdownlatch有什么区别" class="router-link-active router-link-exact-active toc-link level3">41.CyclicBarrier和CountDownLatch有什么区别？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_42-semaphore-信号量-了解吗" class="router-link-active router-link-exact-active toc-link level3">42.Semaphore（信号量）了解吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_43-exchanger-了解吗" class="router-link-active router-link-exact-active toc-link level3">43.Exchanger 了解吗？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#线程池" class="router-link-active router-link-exact-active toc-link level2">线程池</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_44-什么是线程池" class="router-link-active router-link-exact-active toc-link level3">44.什么是线程池？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_45-能说说工作中线程池的应用吗" class="router-link-active router-link-exact-active toc-link level3">45.能说说工作中线程池的应用吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_46-能简单说一下线程池的工作流程吗" class="router-link-active router-link-exact-active toc-link level3">46.能简单说一下线程池的工作流程吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_47-线程池主要参数有哪些" class="router-link-active router-link-exact-active toc-link level3">47.线程池主要参数有哪些？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_48-线程池的拒绝策略有哪些" class="router-link-active router-link-exact-active toc-link level3">48.线程池的拒绝策略有哪些？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_49-线程池有哪几种工作队列" class="router-link-active router-link-exact-active toc-link level3">49.线程池有哪几种工作队列？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_50-线程池提交execute和submit有什么区别" class="router-link-active router-link-exact-active toc-link level3">50.线程池提交execute和submit有什么区别？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_51-线程池怎么关闭知道吗" class="router-link-active router-link-exact-active toc-link level3">51.线程池怎么关闭知道吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_52-线程池的线程数应该怎么配置" class="router-link-active router-link-exact-active toc-link level3">52.线程池的线程数应该怎么配置？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_53-有哪几种常见的线程池" class="router-link-active router-link-exact-active toc-link level3">53.有哪几种常见的线程池？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_54-能说一下四种常见线程池的原理吗" class="router-link-active router-link-exact-active toc-link level3">54.能说一下四种常见线程池的原理吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_55-线程池异常怎么处理知道吗" class="router-link-active router-link-exact-active toc-link level3">55.线程池异常怎么处理知道吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_56-能说一下线程池有几种状态吗" class="router-link-active router-link-exact-active toc-link level3">56.能说一下线程池有几种状态吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_57-线程池如何实现参数的动态修改" class="router-link-active router-link-exact-active toc-link level3">57.线程池如何实现参数的动态修改？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#线程池调优了解吗" class="router-link-active router-link-exact-active toc-link level3">线程池调优了解吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_58-你能设计实现一个线程池吗" class="router-link-active router-link-exact-active toc-link level3">58.你能设计实现一个线程池吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_59-单机线程池执行断电了应该怎么处理" class="router-link-active router-link-exact-active toc-link level3">59.单机线程池执行断电了应该怎么处理？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#并发容器和框架" class="router-link-active router-link-exact-active toc-link level2">并发容器和框架</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/javathread.html#_60-fork-join框架了解吗" class="router-link-active router-link-exact-active toc-link level3">60.Fork/Join框架了解吗？</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="面渣逆袭-java-并发编程篇-必看" tabindex="-1"><a class="header-anchor" href="#面渣逆袭-java-并发编程篇-必看" aria-hidden="true">#</a> 面渣逆袭（Java 并发编程篇）必看👍</h1><blockquote><p>图文详解 60 道Java并发面试高频题，这次面试，一定吊打面试官，整理：沉默王二，戳<a href="https://mp.weixin.qq.com/s/bImCIoYsH_JEzTkBx2lj4A" target="_blank" rel="noopener noreferrer">转载链接<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，作者：三分恶，戳<a href="https://mp.weixin.qq.com/s/1jhBZrAb7bnvkgN1TgAUpw" target="_blank" rel="noopener noreferrer">原文链接<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>。</p></blockquote><h2 id="基础" tabindex="-1"><a class="header-anchor" href="#基础" aria-hidden="true">#</a> 基础</h2><h3 id="_1-并行跟并发有什么区别" tabindex="-1"><a class="header-anchor" href="#_1-并行跟并发有什么区别" aria-hidden="true">#</a> 1.并行跟并发有什么区别？</h3><p>从操作系统的角度来看，线程是CPU分配的最小单位。</p><ul><li>并行就是同一时刻，两个线程都在执行。这就要求有两个CPU去分别执行两个线程。</li><li>并发就是同一时刻，只有一个执行，但是一个时间段内，两个线程都执行了。并发的实现依赖于CPU切换线程，因为切换的时间特别短，所以基本对于用户是无感知的。</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/javathread-1.png" alt="并行和并发"></p><p>就好像我们去食堂打饭，并行就是我们在多个窗口排队，几个阿姨同时打菜；并发就是我们挤在一个窗口，阿姨给这个打一勺，又手忙脚乱地给那个打一勺。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/javathread-2.png" alt="并行并发和食堂打饭"></p><h3 id="_2-说说什么是进程和线程" tabindex="-1"><a class="header-anchor" href="#_2-说说什么是进程和线程" aria-hidden="true">#</a> 2.说说什么是进程和线程？</h3><p>要说线程，必须得先说说进程。</p><ul><li>进程：进程是代码在数据集合上的一次运行活动，是系统进行资源分配和调度的基本单位。</li><li>线程：线程是进程的一个执行路径，一个进程中至少有一个线程，进程中的多个线程共享进程的资源。</li></ul><p>操作系统在分配资源时是把资源分配给进程的， 但是 CPU 资源比较特殊，它是被分配到线程的，因为真正要占用CPU运行的是线程，所以也说线程是 CPU分配的基本单位。</p><p>比如在Java中，当我们启动 main 函数其实就启动了一个JVM进程，而 main 函数在的线程就是这个进程中的一个线程，也称主线程。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/javathread-3.png" alt="程序进程线程关系"></p><p>一个进程中有多个线程，多个线程共用进程的堆和方法区资源，但是每个线程有自己的程序计数器和栈。</p><h3 id="_3-说说线程有几种创建方式" tabindex="-1"><a class="header-anchor" href="#_3-说说线程有几种创建方式" aria-hidden="true">#</a> 3.说说线程有几种创建方式？</h3><p>Java中创建线程主要有三种方式，分别为继承Thread类、实现Runnable接口、实现Callable接口。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/javathread-4.png" alt="线程创建三种方式"></p><ul><li>继承Thread类，重写run()方法，调用start()方法启动线程</li></ul><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">ThreadTest</span> <span class="token punctuation">{</span>
 
     <span class="token doc-comment comment">/**
      * 继承Thread类
@@ -442,6 +442,6 @@ lock<span class="token punctuation">.</span><span class="token function">lock</s
     
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class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>ForkJoinTask与一般Task的主要区别在于它需要实现compute方法，在这个方法里，首先需要判断任务是否足够小，如果足够小就直接执行任务。如果比较大，就必须分割成两个子任务，每个子任务在调用fork方法时，又会进compute方法，看看当前子任务是否需要继续分割成子任务，如果不需要继续分割，则执行当前子任务并返回结果。使用join方法会等待子任务执行完并得到其结果。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><blockquote><p>图文详解 60 道Java并发面试高频题，这次面试，一定吊打面试官，整理：沉默王二，戳<a href="https://mp.weixin.qq.com/s/bImCIoYsH_JEzTkBx2lj4A" target="_blank" rel="noopener noreferrer">转载链接<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，作者：三分恶，戳<a href="https://mp.weixin.qq.com/s/1jhBZrAb7bnvkgN1TgAUpw" target="_blank" rel="noopener noreferrer">原文链接<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon 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id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->面渣逆袭（Java 虚拟机篇）必看👍</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg 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18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category3" role>面渣逆袭</li><meta property="articleSection" content="面渣逆袭"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 54 分钟</span><meta property="timeRequired" content="PT54M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#一、引言" class="router-link-active router-link-exact-active toc-link level2">一、引言</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_1-什么是-jvm" class="router-link-active router-link-exact-active toc-link level3">1.什么是 JVM?</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#二、内存管理" class="router-link-active router-link-exact-active toc-link level2">二、内存管理</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_2-能说一下-jvm-的内存区域吗" class="router-link-active router-link-exact-active toc-link level3">2.能说一下 JVM 的内存区域吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_3-说一下-jdk1-6、1-7、1-8-内存区域的变化" class="router-link-active router-link-exact-active toc-link level3">3.说一下 JDK1.6、1.7、1.8 内存区域的变化？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_4-为什么使用元空间替代永久代作为方法区的实现" class="router-link-active router-link-exact-active toc-link level3">4.为什么使用元空间替代永久代作为方法区的实现？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_5-对象创建的过程了解吗" class="router-link-active router-link-exact-active toc-link level3">5.对象创建的过程了解吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_6-什么是指针碰撞-什么是空闲列表" class="router-link-active router-link-exact-active toc-link level3">6.什么是指针碰撞？什么是空闲列表？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_7-jvm-里-new-对象时-堆会发生抢占吗-jvm-是怎么设计来保证线程安全的" class="router-link-active router-link-exact-active toc-link level3">7.JVM 里 new 对象时，堆会发生抢占吗？JVM 是怎么设计来保证线程安全的？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_8-能说一下对象的内存布局吗" class="router-link-active router-link-exact-active toc-link level3">8.能说一下对象的内存布局吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_9-对象怎么访问定位" class="router-link-active router-link-exact-active toc-link level3">9.对象怎么访问定位？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_10-内存溢出和内存泄漏是什么意思" class="router-link-active router-link-exact-active toc-link level3">10.内存溢出和内存泄漏是什么意思？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_11-能手写内存溢出的例子吗" class="router-link-active router-link-exact-active toc-link level3">11.能手写内存溢出的例子吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_12-内存泄漏可能由哪些原因导致呢" class="router-link-active router-link-exact-active toc-link level3">12.内存泄漏可能由哪些原因导致呢？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_13-如何判断对象仍然存活" class="router-link-active router-link-exact-active toc-link level3">13.如何判断对象仍然存活？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_14-java-中可作为-gc-roots-的对象有哪几种" class="router-link-active router-link-exact-active toc-link level3">14.Java 中可作为 GC Roots 的对象有哪几种？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_15-说一下对象有哪几种引用" class="router-link-active router-link-exact-active toc-link level3">15.说一下对象有哪几种引用？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_16-finalize-方法了解吗-有什么作用" class="router-link-active router-link-exact-active toc-link level3">16.finalize()方法了解吗？有什么作用？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_17-java-堆的内存分区了解吗" class="router-link-active router-link-exact-active toc-link level3">17.Java 堆的内存分区了解吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_18-垃圾收集算法了解吗" class="router-link-active router-link-exact-active toc-link level3">18.垃圾收集算法了解吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_19-说一下新生代的区域划分" class="router-link-active router-link-exact-active toc-link level3">19.说一下新生代的区域划分？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_20-minor-gc-young-gc、major-gc-old-gc、mixed-gc、full-gc-都是什么意思" class="router-link-active router-link-exact-active toc-link level3">20.Minor GC/Young GC、Major GC/Old GC、Mixed GC、Full GC 都是什么意思？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_21-minor-gc-young-gc-什么时候触发" class="router-link-active router-link-exact-active toc-link level3">21.Minor GC/Young GC 什么时候触发？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_22-什么时候会触发-full-gc" class="router-link-active router-link-exact-active toc-link level3">22.什么时候会触发 Full GC？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_23-对象什么时候会进入老年代" class="router-link-active router-link-exact-active toc-link level3">23.对象什么时候会进入老年代？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_24-知道有哪些垃圾收集器吗" class="router-link-active router-link-exact-active toc-link level3">24.知道有哪些垃圾收集器吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_25-什么是-stop-the-world-什么是-oopmap-什么是安全点" class="router-link-active router-link-exact-active toc-link level3">25.什么是 Stop The World ? 什么是 OopMap ？什么是安全点？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_26-能详细说一下-cms-收集器的垃圾收集过程吗" class="router-link-active router-link-exact-active toc-link level3">26.能详细说一下 CMS 收集器的垃圾收集过程吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_27-g1-垃圾收集器了解吗" class="router-link-active router-link-exact-active toc-link level3">27.G1 垃圾收集器了解吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_28-有了-cms-为什么还要引入-g1" class="router-link-active router-link-exact-active toc-link level3">28.有了 CMS，为什么还要引入 G1？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_29-你们线上用的什么垃圾收集器-为什么要用它" class="router-link-active router-link-exact-active toc-link level3">29.你们线上用的什么垃圾收集器？为什么要用它？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_30-垃圾收集器应该如何选择" class="router-link-active router-link-exact-active toc-link level3">30.垃圾收集器应该如何选择？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_31-对象一定分配在堆中吗-有没有了解逃逸分析技术" class="router-link-active router-link-exact-active toc-link level3">31.对象一定分配在堆中吗？有没有了解逃逸分析技术？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#三、jvm-调优" class="router-link-active router-link-exact-active toc-link level2">三、JVM 调优</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_32-有哪些常用的命令行性能监控和故障处理工具" class="router-link-active router-link-exact-active toc-link level3">32.有哪些常用的命令行性能监控和故障处理工具？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_33-了解哪些可视化的性能监控和故障处理工具" class="router-link-active router-link-exact-active toc-link level3">33.了解哪些可视化的性能监控和故障处理工具？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_34-jvm-的常见参数配置知道哪些" class="router-link-active router-link-exact-active toc-link level3">34.JVM 的常见参数配置知道哪些？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_35-有做过-jvm-调优吗" class="router-link-active router-link-exact-active toc-link level3">35.有做过 JVM 调优吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_36-线上服务-cpu-占用过高怎么排查" class="router-link-active router-link-exact-active toc-link level3">36.线上服务 CPU 占用过高怎么排查？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_37-内存飙高问题怎么排查" class="router-link-active router-link-exact-active toc-link level3">37.内存飙高问题怎么排查？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_38-频繁-minor-gc-怎么办" class="router-link-active router-link-exact-active toc-link level3">38.频繁 minor gc 怎么办？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_39-频繁-full-gc-怎么办" class="router-link-active router-link-exact-active toc-link level3">39.频繁 Full GC 怎么办？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_40-有没有处理过内存泄漏问题-是如何定位的" class="router-link-active router-link-exact-active toc-link level3">40.有没有处理过内存泄漏问题？是如何定位的？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_41-有没有处理过内存溢出问题" class="router-link-active router-link-exact-active toc-link level3">41.有没有处理过内存溢出问题？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#四、虚拟机执行" class="router-link-active router-link-exact-active toc-link level2">四、虚拟机执行</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_42-能说一下类的生命周期吗" class="router-link-active router-link-exact-active toc-link level3">42.能说一下类的生命周期吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_43-类加载的过程知道吗" class="router-link-active router-link-exact-active toc-link level3">43.类加载的过程知道吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_44-类加载器有哪些" class="router-link-active router-link-exact-active toc-link level3">44.类加载器有哪些？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_45-什么是双亲委派机制" class="router-link-active router-link-exact-active toc-link level3">45.什么是双亲委派机制？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_46-为什么要用双亲委派机制" class="router-link-active router-link-exact-active toc-link level3">46.为什么要用双亲委派机制？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_47-如何破坏双亲委派机制" class="router-link-active router-link-exact-active toc-link level3">47.如何破坏双亲委派机制？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_48-历史上有哪几次双亲委派机制的破坏" class="router-link-active router-link-exact-active toc-link level3">48.历史上有哪几次双亲委派机制的破坏？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_49-你觉得应该怎么实现一个热部署功能" class="router-link-active router-link-exact-active toc-link level3">49.你觉得应该怎么实现一个热部署功能？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_50-tomcat-的类加载机制了解吗" class="router-link-active router-link-exact-active toc-link level3">50.Tomcat 的类加载机制了解吗？</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="面渣逆袭-java-虚拟机篇-必看" tabindex="-1"><a class="header-anchor" href="#面渣逆袭-java-虚拟机篇-必看" aria-hidden="true">#</a> 面渣逆袭（Java 虚拟机篇）必看👍</h1><blockquote><p>图文详解 50 道Java虚拟机高频面试题，这次面试，一定吊打面试官，整理：沉默王二，戳<a href="https://mp.weixin.qq.com/s/bHhqhl8mH3OAPt3EkaVc8Q" target="_blank" rel="noopener noreferrer">转载链接<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path 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in new window</span></span></a>。</p></blockquote><h2 id="一、引言" tabindex="-1"><a class="header-anchor" href="#一、引言" aria-hidden="true">#</a> 一、引言</h2><h3 id="_1-什么是-jvm" tabindex="-1"><a class="header-anchor" href="#_1-什么是-jvm" aria-hidden="true">#</a> 1.什么是 JVM?</h3><p>JVM——Java 虚拟机，它是 Java 实现平台无关性的基石。</p><p>Java 程序运行的时候，编译器将 Java 文件编译成平台无关的 Java 字节码文件（.class）,接下来对应平台 JVM 对字节码文件进行解释，翻译成对应平台匹配的机器指令并运行。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/jvm-1.png" alt="Java语言编译运行"></p><p>同时 JVM 也是一个跨语言的平台，和语言无关，只和 class 的文件格式关联，任何语言，只要能翻译成符合规范的字节码文件，都能被 JVM 运行。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/jvm-2.png" alt="JVM跨语言"></p><h2 id="二、内存管理" tabindex="-1"><a class="header-anchor" href="#二、内存管理" aria-hidden="true">#</a> 二、内存管理</h2><h3 id="_2-能说一下-jvm-的内存区域吗" tabindex="-1"><a class="header-anchor" href="#_2-能说一下-jvm-的内存区域吗" aria-hidden="true">#</a> 2.能说一下 JVM 的内存区域吗？</h3><p>JVM 内存区域最粗略的划分可以分为<code>堆</code>和<code>栈</code>，当然，按照虚拟机规范，可以划分为以下几个区域：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/jvm-3.png" alt="Java虚拟机运行时数据区"></p><p>JVM 内存分为线程私有区和线程共享区，其中<code>方法区</code>和<code>堆</code>是线程共享区，<code>虚拟机栈</code>、<code>本地方法栈</code>和<code>程序计数器</code>是线程隔离的数据区。</p><p><strong>1）程序计数器</strong></p><p>程序计数器（Program Counter Register）也被称为 PC 寄存器，是一块较小的内存空间。</p><p>它可以看作是当前线程所执行的字节码的行号指示器。</p><p><strong>2）Java 虚拟机栈</strong></p><p>Java 虚拟机栈（Java Virtual Machine Stack）也是线程私有的，它的生命周期与线程相同。</p><p>Java 虚拟机栈描述的是 Java 方法执行的线程内存模型：方法执行时，JVM 会同步创建一个栈帧，用来存储局部变量表、操作数栈、动态连接等。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/jvm-4.png" alt="Java虚拟机栈"></p><p><strong>3）本地方法栈</strong></p><p>本地方法栈（Native Method Stacks）与虚拟机栈所发挥的作用是非常相似的，其区别只是虚拟机栈为虚拟机执行 Java 方法（也就是字节码）服务，而本地方法栈则是为虚拟机使用到的本地（Native）方法服务。</p><p>Java 虚拟机规范允许本地方法栈被实现成固定大小的或者是根据计算动态扩展和收缩的。</p><p><strong>4）Java 堆</strong></p><p>对于 Java 应用程序来说，Java 堆（Java Heap）是虚拟机所管理的内存中最大的一块。Java 堆是被所有线程共享的一块内存区域，在虚拟机启动时创建。此内存区域的唯一目的就是存放对象实例，Java 里“<strong>几乎</strong>”所有的对象实例都在这里分配内存。</p><p>Java 堆是垃圾收集器管理的内存区域，因此一些资料中它也被称作“GC 堆”（Garbage Collected Heap，）。从回收内存的角度看，由于现代垃圾收集器大部分都是基于分代收集理论设计的，所以 Java 堆中经常会出现<code>新生代</code>、<code>老年代</code>、<code>Eden空间</code>、<code>From Survivor空间</code>、<code>To Survivor空间</code>等名词，需要注意的是这种划分只是根据垃圾回收机制来进行的划分，不是 Java 虚拟机规范本身制定的。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/jvm-5.png" alt="Java 堆内存结构"></p><p><strong>5）方法区</strong></p><p>方法区是比较特别的一块区域，和堆类似，它也是各个线程共享的内存区域，用于存储已被虚拟机加载的类型信息、常量、静态变量、即时编译器编译后的代码缓存等数据。</p><p>它特别在 Java 虚拟机规范对它的约束非常宽松，所以方法区的具体实现历经了许多变迁，例如 jdk1.7 之前使用永久代作为方法区的实现。</p><h3 id="_3-说一下-jdk1-6、1-7、1-8-内存区域的变化" tabindex="-1"><a class="header-anchor" href="#_3-说一下-jdk1-6、1-7、1-8-内存区域的变化" aria-hidden="true">#</a> 3.说一下 JDK1.6、1.7、1.8 内存区域的变化？</h3><p>JDK1.6、1.7/1.8 内存区域发生了变化，主要体现在方法区的实现：</p><ul><li>JDK1.6 使用永久代实现方法区：</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/jvm-6.png" alt="JDK 1.6内存区域"></p><ul><li>JDK1.7 时发生了一些变化，将字符串常量池、静态变量，存放在堆上</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/jvm-7.png" alt="JDK 1.7内存区域"></p><ul><li>在 JDK1.8 时彻底干掉了永久代，而在直接内存中划出一块区域作为<strong>元空间</strong>，运行时常量池、类常量池都移动到元空间。</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/jvm-8.png" alt="JDK 1.8内存区域"></p><h3 id="_4-为什么使用元空间替代永久代作为方法区的实现" tabindex="-1"><a class="header-anchor" href="#_4-为什么使用元空间替代永久代作为方法区的实现" aria-hidden="true">#</a> 4.为什么使用元空间替代永久代作为方法区的实现？</h3><p>Java 虚拟机规范规定的方法区只是换种方式实现。有客观和主观两个原因。</p><ul><li><p>客观上使用永久代来实现方法区的决定的设计导致了 Java 应用更容易遇到内存溢出的问题（永久代有-XX：MaxPermSize 的上限，即使不设置也有默认大小，而 J9 和 JRockit 只要没有触碰到进程可用内存的上限，例如 32 位系统中的 4GB 限制，就不会出问题），而且有极少数方法 （例如 String::intern()）会因永久代的原因而导致不同虚拟机下有不同的表现。</p></li><li><p>主观上当 Oracle 收购 BEA 获得了 JRockit 的所有权后，准备把 JRockit 中的优秀功能，譬如 Java Mission Control 管理工具，移植到 HotSpot 虚拟机时，但因为两者对方法区实现的差异而面临诸多困难。考虑到 HotSpot 未来的发展，在 JDK 6 的 时候 HotSpot 开发团队就有放弃永久代，逐步改为采用本地内存（Native Memory）来实现方法区的计划了，到了 JDK 7 的 HotSpot，已经把原本放在永久代的字符串常量池、静态变量等移出，而到了 JDK 8，终于完全废弃了永久代的概念，改用与 JRockit、J9 一样在本地内存中实现的元空间（Meta-space）来代替，把 JDK 7 中永久代还剩余的内容（主要是类型信息）全部移到元空间中。</p></li></ul><h3 id="_5-对象创建的过程了解吗" tabindex="-1"><a class="header-anchor" href="#_5-对象创建的过程了解吗" aria-hidden="true">#</a> 5.对象创建的过程了解吗？</h3><p>在 JVM 中对象的创建，我们从一个 new 指令开始：</p><ul><li><p>首先检查这个指令的参数是否能在常量池中定位到一个类的符号引用</p></li><li><p>检查这个符号引用代表的类是否已被加载、解析和初始化过。如果没有，就先执行相应的类加载过程</p></li><li><p>类加载检查通过后，接下来虚拟机将为新生对象分配内存。</p></li><li><p>内存分配完成之后，虚拟机将分配到的内存空间（但不包括对象头）都初始化为零值。</p></li><li><p>接下来设置对象头，请求头里包含了对象是哪个类的实例、如何才能找到类的元数据信息、对象的哈希码、对象的 GC 分代年龄等信息。</p></li></ul><p>这个过程大概图示如下：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/jvm-9.png" alt="对象创建过程"></p><h3 id="_6-什么是指针碰撞-什么是空闲列表" tabindex="-1"><a class="header-anchor" href="#_6-什么是指针碰撞-什么是空闲列表" aria-hidden="true">#</a> 6.什么是指针碰撞？什么是空闲列表？</h3><p>内存分配有两种方式，<strong>指针碰撞</strong>（Bump The Pointer）、<strong>空闲列表</strong>（Free List）。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/jvm-10.png" alt="指针碰撞和空闲列表"></p><ul><li>指针碰撞：假设 Java 堆中内存是绝对规整的，所有被使用过的内存都被放在一边，空闲的内存被放在另一边，中间放着一个指针作为分界点的指示器，那所分配内存就仅仅是把那个指针向空闲空间方向挪动一段与对象大小相等的距离，这种分配方式称为“指针碰撞”。</li><li>空闲列表：如果 Java 堆中的内存并不是规整的，已被使用的内存和空闲的内存相互交错在一起，那就没有办法简单地进行指针碰撞了，虚拟机就必须维护一个列表，记录上哪些内存块是可用的，在分配的时候从列表中找到一块足够大的空间划分给对象实例，并更新列表上的记录，这种分配方式称为“空闲列表”。</li><li>两种方式的选择由 Java 堆是否规整决定，Java 堆是否规整是由选择的垃圾收集器是否具有压缩整理能力决定的。</li></ul><h3 id="_7-jvm-里-new-对象时-堆会发生抢占吗-jvm-是怎么设计来保证线程安全的" tabindex="-1"><a class="header-anchor" href="#_7-jvm-里-new-对象时-堆会发生抢占吗-jvm-是怎么设计来保证线程安全的" aria-hidden="true">#</a> 7.JVM 里 new 对象时，堆会发生抢占吗？JVM 是怎么设计来保证线程安全的？</h3><p>会，假设 JVM 虚拟机上，每一次 new 对象时，指针就会向右移动一个对象 size 的距离，一个线程正在给 A 对象分配内存，指针还没有来的及修改，另一个为 B 对象分配内存的线程，又引用了这个指针来分配内存，这就发生了抢占。</p><p>有两种可选方案来解决这个问题：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/jvm-11.png" alt="堆抢占和解决方案"></p><ul><li><p>采用 CAS 分配重试的方式来保证更新操作的原子性</p></li><li><p>每个线程在 Java 堆中预先分配一小块内存，也就是本地线程分配缓冲（Thread Local Allocation</p><p>Buffer，TLAB），要分配内存的线程，先在本地缓冲区中分配，只有本地缓冲区用完了，分配新的缓存区时才需要同步锁定。</p></li></ul><h3 id="_8-能说一下对象的内存布局吗" tabindex="-1"><a class="header-anchor" href="#_8-能说一下对象的内存布局吗" aria-hidden="true">#</a> 8.能说一下对象的内存布局吗？</h3><p>在 HotSpot 虚拟机里，对象在堆内存中的存储布局可以划分为三个部分：对象头（Header）、实例数据（Instance Data）和对齐填充（Padding）。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/jvm-12.png" alt="对象的存储布局"></p><p><strong>对象头</strong>主要由两部分组成：</p><ul><li>第一部分存储对象自身的运行时数据：哈希码、GC 分代年龄、锁状态标志、线程持有的锁、偏向线程 ID、偏向时间戳等，官方称它为 Mark Word，它是个动态的结构，随着对象状态变化。</li><li>第二部分是类型指针，指向对象的类元数据类型（即对象代表哪个类）。</li><li>此外，如果对象是一个 Java 数组，那还应该有一块用于记录数组长度的数据</li></ul><p><strong>实例数据</strong>用来存储对象真正的有效信息，也就是我们在程序代码里所定义的各种类型的字段内容，无论是从父类继承的，还是自己定义的。</p><p><strong>对齐填充</strong>不是必须的，没有特别含义，仅仅起着占位符的作用。</p><h3 id="_9-对象怎么访问定位" tabindex="-1"><a class="header-anchor" href="#_9-对象怎么访问定位" aria-hidden="true">#</a> 9.对象怎么访问定位？</h3><p>Java 程序会通过栈上的 reference 数据来操作堆上的具体对象。由于 reference 类型在《Java 虚拟机规范》里面只规定了它是一个指向对象的引用，并没有定义这个引用应该通过什么方式去定位、访问到堆中对象的具体位置，所以对象访问方式也是由虚拟机实现而定的，主流的访问方式主要有使用句柄和直接指针两种：</p><ul><li>如果使用句柄访问的话，Java 堆中将可能会划分出一块内存来作为句柄池，reference 中存储的就是对象的句柄地址，而句柄中包含了对象实例数据与类型数据各自具体的地址信息，其结构如图所示：</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/jvm-13.png" alt="通过句柄访问对象"></p><ul><li>如果使用直接指针访问的话，Java 堆中对象的内存布局就必须考虑如何放置访问类型数据的相关信息，reference 中存储的直接就是对象地址，如果只是访问对象本身的话，就不需要多一次间接访问的开销，如图所示：</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/jvm-14.png" alt="通过直接指针访问对象"></p><p>这两种对象访问方式各有优势，使用句柄来访问的最大好处就是 reference 中存储的是稳定句柄地址，在对象被移动（垃圾收集时移动对象是非常普遍的行为）时只会改变句柄中的实例数据指针，而 reference 本身不需要被修改。</p><p>使用直接指针来访问最大的好处就是速度更快，它节省了一次指针定位的时间开销，由于对象访问在 Java 中非常频繁，因此这类开销积少成多也是一项极为可观的执行成本。</p><p>HotSpot 虚拟机主要使用直接指针来进行对象访问。</p><h3 id="_10-内存溢出和内存泄漏是什么意思" tabindex="-1"><a class="header-anchor" href="#_10-内存溢出和内存泄漏是什么意思" aria-hidden="true">#</a> 10.内存溢出和内存泄漏是什么意思？</h3><p>内存泄露就是申请的内存空间没有被正确释放，导致内存被白白占用。</p><p>内存溢出就是申请的内存超过了可用内存，内存不够了。</p><p>两者关系：内存泄露可能会导致内存溢出。</p><p>用一个有味道的比喻，内存溢出就是排队去蹲坑，发现没坑位了，内存泄漏，就是有人占着茅坑不拉屎，占着茅坑不拉屎的多了可能会导致坑位不够用。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/jvm-15.png" alt="内存泄漏、内存溢出"></p><h3 id="_11-能手写内存溢出的例子吗" tabindex="-1"><a class="header-anchor" href="#_11-能手写内存溢出的例子吗" aria-hidden="true">#</a> 11.能手写内存溢出的例子吗？</h3><p>在 JVM 的几个内存区域中，除了程序计数器外，其他几个运行时区域都有发生内存溢出（OOM）异常的可能，重点关注堆和栈。</p><ul><li>Java 堆溢出</li></ul><p>Java 堆用于储存对象实例，只要不断创建不可被回收的对象，比如静态对象，那么随着对象数量的增加，总容量触及最大堆的容量限制后就会产生内存溢出异常（OutOfMemoryError）。</p><p>这就相当于一个房子里，不断堆积不能被收走的杂物，那么房子很快就会被堆满了。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token doc-comment comment">/**
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都是什么意思？"><!---->20.Minor GC/Young GC、Major GC/Old GC、Mixed GC、Full GC 都是什么意思？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_21-minor-gc-young-gc-什么时候触发" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="21.Minor GC/Young GC 什么时候触发？"><!---->21.Minor GC/Young GC 什么时候触发？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_22-什么时候会触发-full-gc" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="22.什么时候会触发 Full GC？"><!---->22.什么时候会触发 Full GC？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_23-对象什么时候会进入老年代" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="23.对象什么时候会进入老年代？"><!---->23.对象什么时候会进入老年代？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_24-知道有哪些垃圾收集器吗" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="24.知道有哪些垃圾收集器吗？"><!---->24.知道有哪些垃圾收集器吗？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_25-什么是-stop-the-world-什么是-oopmap-什么是安全点" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="25.什么是 Stop The World ? 什么是 OopMap ？什么是安全点？"><!---->25.什么是 Stop The World ? 什么是 OopMap ？什么是安全点？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_26-能详细说一下-cms-收集器的垃圾收集过程吗" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="26.能详细说一下 CMS 收集器的垃圾收集过程吗？"><!---->26.能详细说一下 CMS 收集器的垃圾收集过程吗？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_27-g1-垃圾收集器了解吗" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="27.G1 垃圾收集器了解吗？"><!---->27.G1 垃圾收集器了解吗？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_28-有了-cms-为什么还要引入-g1" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="28.有了 CMS，为什么还要引入 G1？"><!---->28.有了 CMS，为什么还要引入 G1？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_29-你们线上用的什么垃圾收集器-为什么要用它" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="29.你们线上用的什么垃圾收集器？为什么要用它？"><!---->29.你们线上用的什么垃圾收集器？为什么要用它？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_30-垃圾收集器应该如何选择" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="30.垃圾收集器应该如何选择？"><!---->30.垃圾收集器应该如何选择？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_31-对象一定分配在堆中吗-有没有了解逃逸分析技术" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="31.对象一定分配在堆中吗？有没有了解逃逸分析技术？"><!---->31.对象一定分配在堆中吗？有没有了解逃逸分析技术？<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/jvm.html#三、jvm-调优" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="三、JVM 调优"><!---->三、JVM 调优<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_32-有哪些常用的命令行性能监控和故障处理工具" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="32.有哪些常用的命令行性能监控和故障处理工具？"><!---->32.有哪些常用的命令行性能监控和故障处理工具？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_33-了解哪些可视化的性能监控和故障处理工具" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="33.了解哪些可视化的性能监控和故障处理工具？"><!---->33.了解哪些可视化的性能监控和故障处理工具？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_34-jvm-的常见参数配置知道哪些" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="34.JVM 的常见参数配置知道哪些？"><!---->34.JVM 的常见参数配置知道哪些？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_35-有做过-jvm-调优吗" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="35.有做过 JVM 调优吗？"><!---->35.有做过 JVM 调优吗？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_36-线上服务-cpu-占用过高怎么排查" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="36.线上服务 CPU 占用过高怎么排查？"><!---->36.线上服务 CPU 占用过高怎么排查？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_37-内存飙高问题怎么排查" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="37.内存飙高问题怎么排查？"><!---->37.内存飙高问题怎么排查？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_38-频繁-minor-gc-怎么办" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="38.频繁 minor gc 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class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/jvm.html#四、虚拟机执行" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="四、虚拟机执行"><!---->四、虚拟机执行<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_42-能说一下类的生命周期吗" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="42.能说一下类的生命周期吗？"><!---->42.能说一下类的生命周期吗？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_43-类加载的过程知道吗" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="43.类加载的过程知道吗？"><!---->43.类加载的过程知道吗？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_44-类加载器有哪些" class="router-link-active 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class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#一、引言" class="router-link-active router-link-exact-active toc-link level2">一、引言</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_1-什么是-jvm" class="router-link-active router-link-exact-active toc-link level3">1.什么是 JVM?</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#二、内存管理" class="router-link-active router-link-exact-active toc-link level2">二、内存管理</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_2-能说一下-jvm-的内存区域吗" class="router-link-active router-link-exact-active toc-link level3">2.能说一下 JVM 的内存区域吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_3-说一下-jdk1-6、1-7、1-8-内存区域的变化" class="router-link-active router-link-exact-active toc-link level3">3.说一下 JDK1.6、1.7、1.8 内存区域的变化？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_4-为什么使用元空间替代永久代作为方法区的实现" class="router-link-active router-link-exact-active toc-link level3">4.为什么使用元空间替代永久代作为方法区的实现？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_5-对象创建的过程了解吗" class="router-link-active router-link-exact-active toc-link level3">5.对象创建的过程了解吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_6-什么是指针碰撞-什么是空闲列表" class="router-link-active router-link-exact-active toc-link level3">6.什么是指针碰撞？什么是空闲列表？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_7-jvm-里-new-对象时-堆会发生抢占吗-jvm-是怎么设计来保证线程安全的" class="router-link-active router-link-exact-active toc-link level3">7.JVM 里 new 对象时，堆会发生抢占吗？JVM 是怎么设计来保证线程安全的？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_8-能说一下对象的内存布局吗" class="router-link-active router-link-exact-active toc-link level3">8.能说一下对象的内存布局吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_9-对象怎么访问定位" class="router-link-active router-link-exact-active toc-link level3">9.对象怎么访问定位？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_10-内存溢出和内存泄漏是什么意思" class="router-link-active router-link-exact-active toc-link level3">10.内存溢出和内存泄漏是什么意思？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_11-能手写内存溢出的例子吗" class="router-link-active router-link-exact-active toc-link level3">11.能手写内存溢出的例子吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_12-内存泄漏可能由哪些原因导致呢" class="router-link-active router-link-exact-active toc-link level3">12.内存泄漏可能由哪些原因导致呢？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_13-如何判断对象仍然存活" class="router-link-active router-link-exact-active toc-link level3">13.如何判断对象仍然存活？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_14-java-中可作为-gc-roots-的对象有哪几种" class="router-link-active router-link-exact-active toc-link level3">14.Java 中可作为 GC Roots 的对象有哪几种？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_15-说一下对象有哪几种引用" class="router-link-active router-link-exact-active toc-link level3">15.说一下对象有哪几种引用？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_16-finalize-方法了解吗-有什么作用" class="router-link-active router-link-exact-active toc-link level3">16.finalize()方法了解吗？有什么作用？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_17-java-堆的内存分区了解吗" class="router-link-active router-link-exact-active toc-link level3">17.Java 堆的内存分区了解吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_18-垃圾收集算法了解吗" class="router-link-active router-link-exact-active toc-link level3">18.垃圾收集算法了解吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_19-说一下新生代的区域划分" class="router-link-active router-link-exact-active toc-link level3">19.说一下新生代的区域划分？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_20-minor-gc-young-gc、major-gc-old-gc、mixed-gc、full-gc-都是什么意思" class="router-link-active router-link-exact-active toc-link level3">20.Minor GC/Young GC、Major GC/Old GC、Mixed GC、Full GC 都是什么意思？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_21-minor-gc-young-gc-什么时候触发" class="router-link-active router-link-exact-active toc-link level3">21.Minor GC/Young GC 什么时候触发？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_22-什么时候会触发-full-gc" class="router-link-active router-link-exact-active toc-link level3">22.什么时候会触发 Full GC？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_23-对象什么时候会进入老年代" class="router-link-active router-link-exact-active toc-link level3">23.对象什么时候会进入老年代？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_24-知道有哪些垃圾收集器吗" class="router-link-active router-link-exact-active toc-link level3">24.知道有哪些垃圾收集器吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_25-什么是-stop-the-world-什么是-oopmap-什么是安全点" class="router-link-active router-link-exact-active toc-link level3">25.什么是 Stop The World ? 什么是 OopMap ？什么是安全点？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_26-能详细说一下-cms-收集器的垃圾收集过程吗" class="router-link-active router-link-exact-active toc-link level3">26.能详细说一下 CMS 收集器的垃圾收集过程吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_27-g1-垃圾收集器了解吗" class="router-link-active router-link-exact-active toc-link level3">27.G1 垃圾收集器了解吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_28-有了-cms-为什么还要引入-g1" class="router-link-active router-link-exact-active toc-link level3">28.有了 CMS，为什么还要引入 G1？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_29-你们线上用的什么垃圾收集器-为什么要用它" class="router-link-active router-link-exact-active toc-link level3">29.你们线上用的什么垃圾收集器？为什么要用它？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_30-垃圾收集器应该如何选择" class="router-link-active router-link-exact-active toc-link level3">30.垃圾收集器应该如何选择？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_31-对象一定分配在堆中吗-有没有了解逃逸分析技术" class="router-link-active router-link-exact-active toc-link level3">31.对象一定分配在堆中吗？有没有了解逃逸分析技术？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#三、jvm-调优" class="router-link-active router-link-exact-active toc-link level2">三、JVM 调优</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_32-有哪些常用的命令行性能监控和故障处理工具" class="router-link-active router-link-exact-active toc-link level3">32.有哪些常用的命令行性能监控和故障处理工具？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_33-了解哪些可视化的性能监控和故障处理工具" class="router-link-active router-link-exact-active toc-link level3">33.了解哪些可视化的性能监控和故障处理工具？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_34-jvm-的常见参数配置知道哪些" class="router-link-active router-link-exact-active toc-link level3">34.JVM 的常见参数配置知道哪些？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_35-有做过-jvm-调优吗" class="router-link-active router-link-exact-active toc-link level3">35.有做过 JVM 调优吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_36-线上服务-cpu-占用过高怎么排查" class="router-link-active router-link-exact-active toc-link level3">36.线上服务 CPU 占用过高怎么排查？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_37-内存飙高问题怎么排查" class="router-link-active router-link-exact-active toc-link level3">37.内存飙高问题怎么排查？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_38-频繁-minor-gc-怎么办" class="router-link-active router-link-exact-active toc-link level3">38.频繁 minor gc 怎么办？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_39-频繁-full-gc-怎么办" class="router-link-active router-link-exact-active toc-link level3">39.频繁 Full GC 怎么办？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_40-有没有处理过内存泄漏问题-是如何定位的" class="router-link-active router-link-exact-active toc-link level3">40.有没有处理过内存泄漏问题？是如何定位的？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_41-有没有处理过内存溢出问题" class="router-link-active router-link-exact-active toc-link level3">41.有没有处理过内存溢出问题？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#四、虚拟机执行" class="router-link-active router-link-exact-active toc-link level2">四、虚拟机执行</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_42-能说一下类的生命周期吗" class="router-link-active router-link-exact-active toc-link level3">42.能说一下类的生命周期吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_43-类加载的过程知道吗" class="router-link-active router-link-exact-active toc-link level3">43.类加载的过程知道吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_44-类加载器有哪些" class="router-link-active router-link-exact-active toc-link level3">44.类加载器有哪些？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_45-什么是双亲委派机制" class="router-link-active router-link-exact-active toc-link level3">45.什么是双亲委派机制？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_46-为什么要用双亲委派机制" class="router-link-active router-link-exact-active toc-link level3">46.为什么要用双亲委派机制？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_47-如何破坏双亲委派机制" class="router-link-active router-link-exact-active toc-link level3">47.如何破坏双亲委派机制？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_48-历史上有哪几次双亲委派机制的破坏" class="router-link-active router-link-exact-active toc-link level3">48.历史上有哪几次双亲委派机制的破坏？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_49-你觉得应该怎么实现一个热部署功能" class="router-link-active router-link-exact-active toc-link level3">49.你觉得应该怎么实现一个热部署功能？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/jvm.html#_50-tomcat-的类加载机制了解吗" class="router-link-active router-link-exact-active toc-link level3">50.Tomcat 的类加载机制了解吗？</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="面渣逆袭-java-虚拟机篇-必看" tabindex="-1"><a class="header-anchor" href="#面渣逆袭-java-虚拟机篇-必看" aria-hidden="true">#</a> 面渣逆袭（Java 虚拟机篇）必看👍</h1><blockquote><p>图文详解 50 道Java虚拟机高频面试题，这次面试，一定吊打面试官，整理：沉默王二，戳<a href="https://mp.weixin.qq.com/s/bHhqhl8mH3OAPt3EkaVc8Q" target="_blank" rel="noopener noreferrer">转载链接<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，作者：三分恶，戳<a href="https://mp.weixin.qq.com/s/XYsEJyIo46jXhHE1sOR_0Q" target="_blank" rel="noopener noreferrer">原文链接<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>。</p></blockquote><h2 id="一、引言" tabindex="-1"><a class="header-anchor" href="#一、引言" aria-hidden="true">#</a> 一、引言</h2><h3 id="_1-什么是-jvm" tabindex="-1"><a class="header-anchor" href="#_1-什么是-jvm" aria-hidden="true">#</a> 1.什么是 JVM?</h3><p>JVM——Java 虚拟机，它是 Java 实现平台无关性的基石。</p><p>Java 程序运行的时候，编译器将 Java 文件编译成平台无关的 Java 字节码文件（.class）,接下来对应平台 JVM 对字节码文件进行解释，翻译成对应平台匹配的机器指令并运行。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/jvm-1.png" alt="Java语言编译运行"></p><p>同时 JVM 也是一个跨语言的平台，和语言无关，只和 class 的文件格式关联，任何语言，只要能翻译成符合规范的字节码文件，都能被 JVM 运行。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/jvm-2.png" alt="JVM跨语言"></p><h2 id="二、内存管理" tabindex="-1"><a class="header-anchor" href="#二、内存管理" aria-hidden="true">#</a> 二、内存管理</h2><h3 id="_2-能说一下-jvm-的内存区域吗" tabindex="-1"><a class="header-anchor" href="#_2-能说一下-jvm-的内存区域吗" aria-hidden="true">#</a> 2.能说一下 JVM 的内存区域吗？</h3><p>JVM 内存区域最粗略的划分可以分为<code>堆</code>和<code>栈</code>，当然，按照虚拟机规范，可以划分为以下几个区域：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/jvm-3.png" alt="Java虚拟机运行时数据区"></p><p>JVM 内存分为线程私有区和线程共享区，其中<code>方法区</code>和<code>堆</code>是线程共享区，<code>虚拟机栈</code>、<code>本地方法栈</code>和<code>程序计数器</code>是线程隔离的数据区。</p><p><strong>1）程序计数器</strong></p><p>程序计数器（Program Counter Register）也被称为 PC 寄存器，是一块较小的内存空间。</p><p>它可以看作是当前线程所执行的字节码的行号指示器。</p><p><strong>2）Java 虚拟机栈</strong></p><p>Java 虚拟机栈（Java Virtual Machine Stack）也是线程私有的，它的生命周期与线程相同。</p><p>Java 虚拟机栈描述的是 Java 方法执行的线程内存模型：方法执行时，JVM 会同步创建一个栈帧，用来存储局部变量表、操作数栈、动态连接等。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/jvm-4.png" alt="Java虚拟机栈"></p><p><strong>3）本地方法栈</strong></p><p>本地方法栈（Native Method Stacks）与虚拟机栈所发挥的作用是非常相似的，其区别只是虚拟机栈为虚拟机执行 Java 方法（也就是字节码）服务，而本地方法栈则是为虚拟机使用到的本地（Native）方法服务。</p><p>Java 虚拟机规范允许本地方法栈被实现成固定大小的或者是根据计算动态扩展和收缩的。</p><p><strong>4）Java 堆</strong></p><p>对于 Java 应用程序来说，Java 堆（Java Heap）是虚拟机所管理的内存中最大的一块。Java 堆是被所有线程共享的一块内存区域，在虚拟机启动时创建。此内存区域的唯一目的就是存放对象实例，Java 里“<strong>几乎</strong>”所有的对象实例都在这里分配内存。</p><p>Java 堆是垃圾收集器管理的内存区域，因此一些资料中它也被称作“GC 堆”（Garbage Collected Heap，）。从回收内存的角度看，由于现代垃圾收集器大部分都是基于分代收集理论设计的，所以 Java 堆中经常会出现<code>新生代</code>、<code>老年代</code>、<code>Eden空间</code>、<code>From Survivor空间</code>、<code>To Survivor空间</code>等名词，需要注意的是这种划分只是根据垃圾回收机制来进行的划分，不是 Java 虚拟机规范本身制定的。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/jvm-5.png" alt="Java 堆内存结构"></p><p><strong>5）方法区</strong></p><p>方法区是比较特别的一块区域，和堆类似，它也是各个线程共享的内存区域，用于存储已被虚拟机加载的类型信息、常量、静态变量、即时编译器编译后的代码缓存等数据。</p><p>它特别在 Java 虚拟机规范对它的约束非常宽松，所以方法区的具体实现历经了许多变迁，例如 jdk1.7 之前使用永久代作为方法区的实现。</p><h3 id="_3-说一下-jdk1-6、1-7、1-8-内存区域的变化" tabindex="-1"><a class="header-anchor" href="#_3-说一下-jdk1-6、1-7、1-8-内存区域的变化" aria-hidden="true">#</a> 3.说一下 JDK1.6、1.7、1.8 内存区域的变化？</h3><p>JDK1.6、1.7/1.8 内存区域发生了变化，主要体现在方法区的实现：</p><ul><li>JDK1.6 使用永久代实现方法区：</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/jvm-6.png" alt="JDK 1.6内存区域"></p><ul><li>JDK1.7 时发生了一些变化，将字符串常量池、静态变量，存放在堆上</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/jvm-7.png" alt="JDK 1.7内存区域"></p><ul><li>在 JDK1.8 时彻底干掉了永久代，而在直接内存中划出一块区域作为<strong>元空间</strong>，运行时常量池、类常量池都移动到元空间。</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/jvm-8.png" alt="JDK 1.8内存区域"></p><h3 id="_4-为什么使用元空间替代永久代作为方法区的实现" tabindex="-1"><a class="header-anchor" href="#_4-为什么使用元空间替代永久代作为方法区的实现" aria-hidden="true">#</a> 4.为什么使用元空间替代永久代作为方法区的实现？</h3><p>Java 虚拟机规范规定的方法区只是换种方式实现。有客观和主观两个原因。</p><ul><li><p>客观上使用永久代来实现方法区的决定的设计导致了 Java 应用更容易遇到内存溢出的问题（永久代有-XX：MaxPermSize 的上限，即使不设置也有默认大小，而 J9 和 JRockit 只要没有触碰到进程可用内存的上限，例如 32 位系统中的 4GB 限制，就不会出问题），而且有极少数方法 （例如 String::intern()）会因永久代的原因而导致不同虚拟机下有不同的表现。</p></li><li><p>主观上当 Oracle 收购 BEA 获得了 JRockit 的所有权后，准备把 JRockit 中的优秀功能，譬如 Java Mission Control 管理工具，移植到 HotSpot 虚拟机时，但因为两者对方法区实现的差异而面临诸多困难。考虑到 HotSpot 未来的发展，在 JDK 6 的 时候 HotSpot 开发团队就有放弃永久代，逐步改为采用本地内存（Native Memory）来实现方法区的计划了，到了 JDK 7 的 HotSpot，已经把原本放在永久代的字符串常量池、静态变量等移出，而到了 JDK 8，终于完全废弃了永久代的概念，改用与 JRockit、J9 一样在本地内存中实现的元空间（Meta-space）来代替，把 JDK 7 中永久代还剩余的内容（主要是类型信息）全部移到元空间中。</p></li></ul><h3 id="_5-对象创建的过程了解吗" tabindex="-1"><a class="header-anchor" href="#_5-对象创建的过程了解吗" aria-hidden="true">#</a> 5.对象创建的过程了解吗？</h3><p>在 JVM 中对象的创建，我们从一个 new 指令开始：</p><ul><li><p>首先检查这个指令的参数是否能在常量池中定位到一个类的符号引用</p></li><li><p>检查这个符号引用代表的类是否已被加载、解析和初始化过。如果没有，就先执行相应的类加载过程</p></li><li><p>类加载检查通过后，接下来虚拟机将为新生对象分配内存。</p></li><li><p>内存分配完成之后，虚拟机将分配到的内存空间（但不包括对象头）都初始化为零值。</p></li><li><p>接下来设置对象头，请求头里包含了对象是哪个类的实例、如何才能找到类的元数据信息、对象的哈希码、对象的 GC 分代年龄等信息。</p></li></ul><p>这个过程大概图示如下：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/jvm-9.png" alt="对象创建过程"></p><h3 id="_6-什么是指针碰撞-什么是空闲列表" tabindex="-1"><a class="header-anchor" href="#_6-什么是指针碰撞-什么是空闲列表" aria-hidden="true">#</a> 6.什么是指针碰撞？什么是空闲列表？</h3><p>内存分配有两种方式，<strong>指针碰撞</strong>（Bump The Pointer）、<strong>空闲列表</strong>（Free List）。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/jvm-10.png" alt="指针碰撞和空闲列表"></p><ul><li>指针碰撞：假设 Java 堆中内存是绝对规整的，所有被使用过的内存都被放在一边，空闲的内存被放在另一边，中间放着一个指针作为分界点的指示器，那所分配内存就仅仅是把那个指针向空闲空间方向挪动一段与对象大小相等的距离，这种分配方式称为“指针碰撞”。</li><li>空闲列表：如果 Java 堆中的内存并不是规整的，已被使用的内存和空闲的内存相互交错在一起，那就没有办法简单地进行指针碰撞了，虚拟机就必须维护一个列表，记录上哪些内存块是可用的，在分配的时候从列表中找到一块足够大的空间划分给对象实例，并更新列表上的记录，这种分配方式称为“空闲列表”。</li><li>两种方式的选择由 Java 堆是否规整决定，Java 堆是否规整是由选择的垃圾收集器是否具有压缩整理能力决定的。</li></ul><h3 id="_7-jvm-里-new-对象时-堆会发生抢占吗-jvm-是怎么设计来保证线程安全的" tabindex="-1"><a class="header-anchor" href="#_7-jvm-里-new-对象时-堆会发生抢占吗-jvm-是怎么设计来保证线程安全的" aria-hidden="true">#</a> 7.JVM 里 new 对象时，堆会发生抢占吗？JVM 是怎么设计来保证线程安全的？</h3><p>会，假设 JVM 虚拟机上，每一次 new 对象时，指针就会向右移动一个对象 size 的距离，一个线程正在给 A 对象分配内存，指针还没有来的及修改，另一个为 B 对象分配内存的线程，又引用了这个指针来分配内存，这就发生了抢占。</p><p>有两种可选方案来解决这个问题：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/jvm-11.png" alt="堆抢占和解决方案"></p><ul><li><p>采用 CAS 分配重试的方式来保证更新操作的原子性</p></li><li><p>每个线程在 Java 堆中预先分配一小块内存，也就是本地线程分配缓冲（Thread Local Allocation</p><p>Buffer，TLAB），要分配内存的线程，先在本地缓冲区中分配，只有本地缓冲区用完了，分配新的缓存区时才需要同步锁定。</p></li></ul><h3 id="_8-能说一下对象的内存布局吗" tabindex="-1"><a class="header-anchor" href="#_8-能说一下对象的内存布局吗" aria-hidden="true">#</a> 8.能说一下对象的内存布局吗？</h3><p>在 HotSpot 虚拟机里，对象在堆内存中的存储布局可以划分为三个部分：对象头（Header）、实例数据（Instance Data）和对齐填充（Padding）。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/jvm-12.png" alt="对象的存储布局"></p><p><strong>对象头</strong>主要由两部分组成：</p><ul><li>第一部分存储对象自身的运行时数据：哈希码、GC 分代年龄、锁状态标志、线程持有的锁、偏向线程 ID、偏向时间戳等，官方称它为 Mark Word，它是个动态的结构，随着对象状态变化。</li><li>第二部分是类型指针，指向对象的类元数据类型（即对象代表哪个类）。</li><li>此外，如果对象是一个 Java 数组，那还应该有一块用于记录数组长度的数据</li></ul><p><strong>实例数据</strong>用来存储对象真正的有效信息，也就是我们在程序代码里所定义的各种类型的字段内容，无论是从父类继承的，还是自己定义的。</p><p><strong>对齐填充</strong>不是必须的，没有特别含义，仅仅起着占位符的作用。</p><h3 id="_9-对象怎么访问定位" tabindex="-1"><a class="header-anchor" href="#_9-对象怎么访问定位" aria-hidden="true">#</a> 9.对象怎么访问定位？</h3><p>Java 程序会通过栈上的 reference 数据来操作堆上的具体对象。由于 reference 类型在《Java 虚拟机规范》里面只规定了它是一个指向对象的引用，并没有定义这个引用应该通过什么方式去定位、访问到堆中对象的具体位置，所以对象访问方式也是由虚拟机实现而定的，主流的访问方式主要有使用句柄和直接指针两种：</p><ul><li>如果使用句柄访问的话，Java 堆中将可能会划分出一块内存来作为句柄池，reference 中存储的就是对象的句柄地址，而句柄中包含了对象实例数据与类型数据各自具体的地址信息，其结构如图所示：</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/jvm-13.png" alt="通过句柄访问对象"></p><ul><li>如果使用直接指针访问的话，Java 堆中对象的内存布局就必须考虑如何放置访问类型数据的相关信息，reference 中存储的直接就是对象地址，如果只是访问对象本身的话，就不需要多一次间接访问的开销，如图所示：</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/jvm-14.png" alt="通过直接指针访问对象"></p><p>这两种对象访问方式各有优势，使用句柄来访问的最大好处就是 reference 中存储的是稳定句柄地址，在对象被移动（垃圾收集时移动对象是非常普遍的行为）时只会改变句柄中的实例数据指针，而 reference 本身不需要被修改。</p><p>使用直接指针来访问最大的好处就是速度更快，它节省了一次指针定位的时间开销，由于对象访问在 Java 中非常频繁，因此这类开销积少成多也是一项极为可观的执行成本。</p><p>HotSpot 虚拟机主要使用直接指针来进行对象访问。</p><h3 id="_10-内存溢出和内存泄漏是什么意思" tabindex="-1"><a class="header-anchor" href="#_10-内存溢出和内存泄漏是什么意思" aria-hidden="true">#</a> 10.内存溢出和内存泄漏是什么意思？</h3><p>内存泄露就是申请的内存空间没有被正确释放，导致内存被白白占用。</p><p>内存溢出就是申请的内存超过了可用内存，内存不够了。</p><p>两者关系：内存泄露可能会导致内存溢出。</p><p>用一个有味道的比喻，内存溢出就是排队去蹲坑，发现没坑位了，内存泄漏，就是有人占着茅坑不拉屎，占着茅坑不拉屎的多了可能会导致坑位不够用。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/jvm-15.png" alt="内存泄漏、内存溢出"></p><h3 id="_11-能手写内存溢出的例子吗" tabindex="-1"><a class="header-anchor" href="#_11-能手写内存溢出的例子吗" aria-hidden="true">#</a> 11.能手写内存溢出的例子吗？</h3><p>在 JVM 的几个内存区域中，除了程序计数器外，其他几个运行时区域都有发生内存溢出（OOM）异常的可能，重点关注堆和栈。</p><ul><li>Java 堆溢出</li></ul><p>Java 堆用于储存对象实例，只要不断创建不可被回收的对象，比如静态对象，那么随着对象数量的增加，总容量触及最大堆的容量限制后就会产生内存溢出异常（OutOfMemoryError）。</p><p>这就相当于一个房子里，不断堆积不能被收走的杂物，那么房子很快就会被堆满了。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token doc-comment comment">/**
  * VM参数： -Xms20m -Xmx20m -XX:+HeapDumpOnOutOfMemoryError
  */</span>
 <span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">HeapOOM</span> <span class="token punctuation">{</span>
@@ -146,6 +146,6 @@ jmap -dump:format<span class="token operator">=</span>b,file<span class="token o
 <span class="token class-name">Dumping</span> heap <span class="token keyword">to</span> <span class="token operator">/</span>root<span class="token operator">/</span>dump <span class="token punctuation">.</span><span class="token punctuation">.</span><span class="token punctuation">.</span>
 <span class="token class-name">Heap</span> dump file created
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>10）dump 文件分析</p><p>可以使用 <strong>jhat</strong> 命令分析：<code>jhat -port 8000 29471.dump</code>，浏览器访问 jhat 服务，端口是 8000。</p><p>通常使用图形化工具分析，如 JDK 自带的 <strong>jvisualvm</strong>，从菜单 &gt; 文件 &gt; 装入 dump 文件。</p><p>或使用第三方式具分析的，如 <strong>JProfiler</strong> 也是个图形化工具，<strong>GCViewer</strong> 工具。Eclipse 或以使用 MAT 工具查看。或使用在线分析平台 <strong>GCEasy</strong>。</p><p><strong>注意</strong>：如果 dump 文件较大的话，分析会占比较大的内存。</p><p>11）在 dump 文析结果中查找存在大量的对象，再查对其的引用。</p><p>基本上就可以定位到代码层的逻辑了。</p><h3 id="_41-有没有处理过内存溢出问题" tabindex="-1"><a class="header-anchor" href="#_41-有没有处理过内存溢出问题" aria-hidden="true">#</a> 41.有没有处理过内存溢出问题？</h3><p>内存泄漏和内存溢出二者关系非常密切，内存溢出可能会有很多原因导致，内存泄漏最可能的罪魁祸首之一。</p><p>排查过程和排查内存泄漏过程类似。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><h2 id="四、虚拟机执行" tabindex="-1"><a class="header-anchor" href="#四、虚拟机执行" aria-hidden="true">#</a> 四、虚拟机执行</h2><h3 id="_42-能说一下类的生命周期吗" tabindex="-1"><a class="header-anchor" href="#_42-能说一下类的生命周期吗" aria-hidden="true">#</a> 42.能说一下类的生命周期吗？</h3><p>一个类从被加载到虚拟机内存中开始，到从内存中卸载，整个生命周期需要经过七个阶段：加载 （Loading）、验证（Verification）、准备（Preparation）、解析（Resolution）、初始化 （Initialization）、使用（Using）和卸载（Unloading），其中验证、准备、解析三个部分统称为连接（Linking）。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/jvm-44.png" alt="类的生命周期"></p><h3 id="_43-类加载的过程知道吗" tabindex="-1"><a class="header-anchor" href="#_43-类加载的过程知道吗" aria-hidden="true">#</a> 43.类加载的过程知道吗？</h3><p>加载是 JVM 加载的起点，具体什么时候开始加载，《Java 虚拟机规范》中并没有进行强制约束，可以交给虚拟机的具体实现来自由把握。</p><p>在加载过程，JVM 要做三件事情：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/jvm-45.png" alt="加载"></p><ul><li><p>1）通过一个类的全限定名来获取定义此类的二进制字节流。</p></li><li><p>2）将这个字节流所代表的静态存储结构转化为方法区的运行时数据结构。</p></li><li><p>3）在内存中生成一个代表这个类的 java.lang.Class 对象，作为方法区这个类的各种数据的访问入口。</p></li></ul><p>加载阶段结束后，Java 虚拟机外部的二进制字节流就按照虚拟机所设定的格式存储在方法区之中了，方法区中的数据存储格式完全由虚拟机实现自行定义，《Java 虚拟机规范》未规定此区域的具体数据结构。</p><p>类型数据妥善安置在方法区之后，会在 Java 堆内存中实例化一个 java.lang.Class 类的对象， 这个对象将作为程序访问方法区中的类型数据的外部接口。</p><h3 id="_44-类加载器有哪些" tabindex="-1"><a class="header-anchor" href="#_44-类加载器有哪些" aria-hidden="true">#</a> 44.类加载器有哪些？</h3><p>主要有四种类加载器:</p><ul><li><p><strong>启动类加载器</strong>(Bootstrap ClassLoader)用来加载 java 核心类库，无法被 java 程序直接引用。</p></li><li><p><strong>扩展类加载器</strong>(extensions class loader):它用来加载 Java 的扩展库。Java 虚拟机的实现会提供一个扩展库目录。该类加载器在此目录里面查找并加载 Java 类。</p></li><li><p><strong>系统类加载器</strong>（system class loader）：它根据 Java 应用的类路径（CLASSPATH）来加载 Java 类。一般来说，Java 应用的类都是由它来完成加载的。可以通过 ClassLoader.getSystemClassLoader()来获取它。</p></li><li><p><strong>用户自定义类加载器</strong> (user class loader)，用户通过继承 java.lang.ClassLoader 类的方式自行实现的类加载器。</p></li></ul><h3 id="_45-什么是双亲委派机制" tabindex="-1"><a class="header-anchor" href="#_45-什么是双亲委派机制" aria-hidden="true">#</a> 45.什么是双亲委派机制？</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/jvm-46.png" alt="双亲委派模型"></p><p>双亲委派模型的工作过程：如果一个类加载器收到了类加载的请求，它首先不会自己去尝试加载这个类，而是把这个请求委派给父类加载器去完成，每一个层次的类加载器都是如此，因此所有的加载请求最终都应该传送到最顶层的启动类加载器中，只有当父加载器反馈自己无法完成这个加载请求时，子加载器才会尝试自己去完成加载。</p><h3 id="_46-为什么要用双亲委派机制" tabindex="-1"><a class="header-anchor" href="#_46-为什么要用双亲委派机制" aria-hidden="true">#</a> 46.为什么要用双亲委派机制？</h3><p>答案是为了保证应用程序的稳定有序。</p><p>例如类 java.lang.Object，它存放在 rt.jar 之中，通过双亲委派机制，保证最终都是委派给处于模型最顶端的启动类加载器进行加载，保证 Object 的一致。反之，都由各个类加载器自行去加载的话，如果用户自己也编写了一个名为 java.lang.Object 的类，并放在程序的 ClassPath 中，那系统中就会出现多个不同的 Object 类。</p><h3 id="_47-如何破坏双亲委派机制" tabindex="-1"><a class="header-anchor" href="#_47-如何破坏双亲委派机制" aria-hidden="true">#</a> 47.如何破坏双亲委派机制？</h3><p>如果不想打破双亲委派模型，就重写 ClassLoader 类中的 fifindClass()方法即可，无法被父类加载器加载的类最终会通过这个方法被加载。而如果想打破双亲委派模型则需要重写 loadClass()方法。</p><h3 id="_48-历史上有哪几次双亲委派机制的破坏" tabindex="-1"><a class="header-anchor" href="#_48-历史上有哪几次双亲委派机制的破坏" aria-hidden="true">#</a> 48.历史上有哪几次双亲委派机制的破坏？</h3><p>双亲委派机制在历史上主要有三次破坏：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/jvm-47.png" alt="双亲委派模型的三次破坏"></p><blockquote><p><strong>第一次破坏</strong></p></blockquote><p>双亲委派模型的第一次“被破坏”其实发生在双亲委派模型出现之前——即 JDK 1.2 面世以前的“远古”时代。</p><p>由于双亲委派模型在 JDK 1.2 之后才被引入，但是类加载器的概念和抽象类 java.lang.ClassLoader 则在 Java 的第一个版本中就已经存在，为了向下兼容旧代码，所以无法以技术手段避免 loadClass()被子类覆盖的可能性，只能在 JDK 1.2 之后的 java.lang.ClassLoader 中添加一个新的 protected 方法 findClass()，并引导用户编写的类加载逻辑时尽可能去重写这个方法，而不是在 loadClass()中编写代码。</p><blockquote><p><strong>第二次破坏</strong></p></blockquote><p>双亲委派模型的第二次“被破坏”是由这个模型自身的缺陷导致的，如果有基础类型又要调用回用户的代码，那该怎么办呢？</p><p>例如我们比较熟悉的 JDBC:</p><p>各个厂商各有不同的 JDBC 的实现，Java 在核心包<code>\lib</code>里定义了对应的 SPI，那么这个就毫无疑问由<code>启动类加载器</code>加载器加载。</p><p>但是各个厂商的实现，是没办法放在核心包里的，只能放在<code>classpath</code>里，只能被<code>应用类加载器</code>加载。那么，问题来了，启动类加载器它就加载不到厂商提供的 SPI 服务代码。</p><p>为了解决这个问题，引入了一个不太优雅的设计：线程上下文类加载器 （Thread Context ClassLoader）。这个类加载器可以通过 java.lang.Thread 类的 setContext-ClassLoader()方法进行设置，如果创建线程时还未设置，它将会从父线程中继承一个，如果在应用程序的全局范围内都没有设置过的话，那这个类加载器默认就是应用程序类加载器。</p><p>JNDI 服务使用这个线程上下文类加载器去加载所需的 SPI 服务代码，这是一种父类加载器去请求子类加载器完成类加载的行为。</p><blockquote><p><strong>第三次破坏</strong></p></blockquote><p>双亲委派模型的第三次“被破坏”是由于用户对程序动态性的追求而导致的，例如代码热替换（Hot Swap）、模块热部署（Hot Deployment）等。</p><p>OSGi 实现模块化热部署的关键是它自定义的类加载器机制的实现，每一个程序模块（OSGi 中称为 Bundle）都有一个自己的类加载器，当需要更换一个 Bundle 时，就把 Bundle 连同类加载器一起换掉以实现代码的热替换。在 OSGi 环境下，类加载器不再双亲委派模型推荐的树状结构，而是进一步发展为更加复杂的网状结构。</p><h3 id="_49-你觉得应该怎么实现一个热部署功能" tabindex="-1"><a class="header-anchor" href="#_49-你觉得应该怎么实现一个热部署功能" aria-hidden="true">#</a> 49.你觉得应该怎么实现一个热部署功能？</h3><p>我们已经知道了 Java 类的加载过程。一个 Java 类文件到虚拟机里的对象，要经过如下过程:首先通过 Java 编译器，将 Java 文件编译成 class 字节码，类加载器读取 class 字节码，再将类转化为实例，对实例 newInstance 就可以生成对象。</p><p>类加载器 ClassLoader 功能，也就是将 class 字节码转换到类的实例。在 Java 应用中，所有的实例都是由类加载器，加载而来。</p><p>一般在系统中，类的加载都是由系统自带的类加载器完成，而且对于同一个全限定名的 java 类（如 com.csiar.soc.HelloWorld），只能被加载一次，而且无法被卸载。</p><p>这个时候问题就来了，如果我们希望将 java 类卸载，并且替换更新版本的 java 类，该怎么做呢？</p><p>既然在类加载器中，Java 类只能被加载一次，并且无法卸载。那么我们是不是可以直接把 Java 类加载器干掉呢？答案是可以的，我们可以自定义类加载器，并重写 ClassLoader 的 findClass 方法。</p><p>想要实现热部署可以分以下三个步骤：</p><ul><li>1）销毁原来的自定义 ClassLoader</li><li>2）更新 class 类文件</li><li>3）创建新的 ClassLoader 去加载更新后的 class 类文件。</li></ul><p>到此，一个热部署的功能就这样实现了。</p><h3 id="_50-tomcat-的类加载机制了解吗" tabindex="-1"><a class="header-anchor" href="#_50-tomcat-的类加载机制了解吗" aria-hidden="true">#</a> 50.Tomcat 的类加载机制了解吗？</h3><p>Tomcat 是主流的 Java Web 服务器之一，为了实现一些特殊的功能需求，自定义了一些类加载器。</p><p>Tomcat 类加载器如下：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/jvm-48.png" alt="Tomcat类加载器"></p><p>Tomcat 实际上也是破坏了双亲委派模型的。</p><p>Tomact 是 web 容器，可能需要部署多个应用程序。不同的应用程序可能会依赖同一个第三方类库的不同版本，但是不同版本的类库中某一个类的全路径名可能是一样的。如多个应用都要依赖 hollis.jar，但是 A 应用需要依赖 1.0.0 版本，但是 B 应用需要依赖 1.0.1 版本。这两个版本中都有一个类是 com.hollis.Test.class。如果采用默认的双亲委派类加载机制，那么无法加载多个相同的类。</p><p>所以，Tomcat 破坏了<strong>双亲委派原则</strong>，提供隔离的机制，为每个 web 容器单独提供一个 WebAppClassLoader 加载器。每一个 WebAppClassLoader 负责加载本身的目录下的 class 文件，加载不到时再交 CommonClassLoader 加载，这和双亲委派刚好相反。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><blockquote><p>图文详解 50 道Java虚拟机高频面试题，这次面试，一定吊打面试官，整理：沉默王二，戳<a href="https://mp.weixin.qq.com/s/bHhqhl8mH3OAPt3EkaVc8Q" target="_blank" rel="noopener noreferrer">转载链接<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，作者：三分恶，戳<a href="https://mp.weixin.qq.com/s/XYsEJyIo46jXhHE1sOR_0Q" target="_blank" rel="noopener noreferrer">原文链接<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>。</p></blockquote></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/sidebar/sanfene/jvm.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 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property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 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0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category3" role>面渣逆袭</li><meta property="articleSection" content="面渣逆袭"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag2" role>MyBatis</li></ul><meta property="keywords" content="MyBatis"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 26 分钟</span><meta property="timeRequired" content="PT26M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/mybatis.html#基础" class="router-link-active router-link-exact-active toc-link level2">基础</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/mybatis.html#_1-说说什么是mybatis" class="router-link-active router-link-exact-active toc-link level3">1. 说说什么是MyBatis?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/mybatis.html#_2-hibernate-和-mybatis-有什么区别" class="router-link-active router-link-exact-active toc-link level3">2. Hibernate 和 MyBatis 有什么区别？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/mybatis.html#_3-mybatis使用过程-生命周期" class="router-link-active router-link-exact-active toc-link level3">3. MyBatis使用过程？生命周期？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/mybatis.html#_4-在mapper中如何传递多个参数" class="router-link-active router-link-exact-active toc-link level3">4. 在mapper中如何传递多个参数？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/mybatis.html#_5-实体类属性名和表中字段名不一样-怎么办" class="router-link-active router-link-exact-active toc-link level3">5. 实体类属性名和表中字段名不一样 ，怎么办?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/mybatis.html#_6-mybatis是否可以映射enum枚举类" class="router-link-active router-link-exact-active toc-link level3">6. Mybatis是否可以映射Enum枚举类？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/mybatis.html#_7-和-的区别" class="router-link-active router-link-exact-active toc-link level3">7. #{}和${}的区别?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/mybatis.html#_8-模糊查询like语句该怎么写" class="router-link-active router-link-exact-active toc-link level3">8. 模糊查询like语句该怎么写?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/mybatis.html#_9-mybatis能执行一对一、一对多的关联查询吗" class="router-link-active router-link-exact-active toc-link level3">9. Mybatis能执行一对一、一对多的关联查询吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/mybatis.html#_10-mybatis是否支持延迟加载-原理" class="router-link-active router-link-exact-active toc-link level3">10. Mybatis是否支持延迟加载？原理？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/mybatis.html#_11-如何获取生成的主键" class="router-link-active router-link-exact-active toc-link level3">11. 如何获取生成的主键?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/mybatis.html#_12-mybatis支持动态sql吗" class="router-link-active router-link-exact-active toc-link level3">12. MyBatis支持动态SQL吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/mybatis.html#_13-mybatis如何执行批量操作" class="router-link-active router-link-exact-active toc-link level3">13. MyBatis如何执行批量操作？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/mybatis.html#_14-说说mybatis的一级、二级缓存" class="router-link-active router-link-exact-active toc-link level3">14. 说说Mybatis的一级、二级缓存？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/mybatis.html#原理" class="router-link-active router-link-exact-active toc-link level2">原理</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/mybatis.html#_15-能说说mybatis的工作原理吗" class="router-link-active router-link-exact-active toc-link level3">15. 能说说MyBatis的工作原理吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/mybatis.html#_16-mybatis的功能架构是什么样的" class="router-link-active router-link-exact-active toc-link level3">16. MyBatis的功能架构是什么样的？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/mybatis.html#_17-为什么mapper接口不需要实现类" class="router-link-active router-link-exact-active toc-link level3">17. 为什么Mapper接口不需要实现类？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/mybatis.html#_18-mybatis都有哪些executor执行器" class="router-link-active router-link-exact-active toc-link level3">18.Mybatis都有哪些Executor执行器？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/mybatis.html#插件" class="router-link-active router-link-exact-active toc-link level2">插件</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/mybatis.html#_19-说说mybatis的插件运行原理-如何编写一个插件" class="router-link-active router-link-exact-active toc-link level3">19. 说说Mybatis的插件运行原理，如何编写一个插件？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/mybatis.html#_20-mybatis是如何进行分页的-分页插件的原理是什么" class="router-link-active router-link-exact-active toc-link level3">20. MyBatis是如何进行分页的？分页插件的原理是什么？</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><blockquote><p>图文详解 20 道MyBatis面试高频题，这次吊打面试官，我觉得稳了（手动 dog）。整理：沉默王二，戳<a href="https://mp.weixin.qq.com/s/en2RgcVx52Ql3tYGLfv3Kw" target="_blank" rel="noopener noreferrer">转载链接<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，作者：三分恶，戳<a href="https://mp.weixin.qq.com/s/O_5Id2o9IP4loPazJuiHng" target="_blank" rel="noopener noreferrer">原文链接<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>。</p></blockquote><p>大家好，我是二哥呀，面渣逆袭系列继续，这节我们的主角是MyBatis，作为当前国内最流行的ORM框架，是我们这些crud选手最趁手的工具，赶紧来看看面试都会问哪些问题吧。</p><h2 id="基础" tabindex="-1"><a class="header-anchor" href="#基础" aria-hidden="true">#</a> 基础</h2><h3 id="_1-说说什么是mybatis" tabindex="-1"><a class="header-anchor" href="#_1-说说什么是mybatis" aria-hidden="true">#</a> 1. 说说什么是MyBatis?</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/mybatis-41c60cf7-6551-4720-8735-290a083640a5.png" alt="MyBatis logo"></p><p><strong>先吹一下</strong>：</p><ul><li>Mybatis 是一个半 ORM（对象关系映射）框架，它内部封装了 JDBC，开发时只需要关注 SQL 语句本身，不需要花费精力去处理加载驱动、创建连接、创建statement 等繁杂的过程。程序员直接编写原生态 sql，可以严格控制 sql 执行性能，灵活度高。</li><li>MyBatis 可以使用 XML 或注解来配置和映射原生信息，将 POJO 映射成数据库中的记录，避免了几乎所有的 JDBC 代码和手动设置参数以及获取结果集。</li></ul><p><strong>再说一下缺点</strong></p><ul><li>SQL语句的编写工作量较大，尤其当字段多、关联表多时，对开发人员编写SQL语句的功底有一定要求</li><li>SQL语句依赖于数据库，导致数据库移植性差，不能随意更换数据库</li></ul><blockquote><p><strong>ORM是什么?</strong></p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/mybatis-ea212850-56e0-4d12-98fb-03bb40007f44.png" alt="ORM简单示意图"></p><ul><li>ORM（Object Relational Mapping），对象关系映射，是一种为了解决关系型数据库数据与简单Java对象（POJO）的映射关系的技术。简单来说，ORM是通过使用描述对象和数据库之间映射的元数据，将程序中的对象自动持久化到关系型数据库中。</li></ul><blockquote><p><strong>为什么说Mybatis是半自动ORM映射工具？它与全自动的区别在哪里？</strong></p></blockquote><ul><li>Hibernate属于全自动ORM映射工具，使用Hibernate查询关联对象或者关联集合对象时，可以根据对象关系模型直接获取，所以它是全自动的。</li><li>而Mybatis在查询关联对象或关联集合对象时，需要手动编写SQL来完成，所以，被称之为半自动ORM映射工具。</li></ul><blockquote><p><strong>JDBC编程有哪些不足之处，MyBatis是如何解决的？</strong></p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/mybatis-f8b181a3-ad40-4381-98ba-351668579bfb.png" alt="JDBC编程的不足"></p><ul><li>1、数据连接创建、释放频繁造成系统资源浪费从而影响系统性能，在mybatis-config.xml中配置数据链接池，使用连接池统一管理数据库连接。</li><li>2、sql语句写在代码中造成代码不易维护，将sql语句配置在XXXXmapper.xml文件中与java代码分离。</li><li>3、向sql语句传参数麻烦，因为sql语句的where条件不一定，可能多也可能少，占位符需要和参数一一对应。Mybatis自动将java对象映射至sql语句。</li><li>4、对结果集解析麻烦，sql变化导致解析代码变化，且解析前需要遍历，如果能将数据库记录封装成pojo对象解析比较方便。Mybatis自动将sql执行结果映射至java对象。</li></ul><h3 id="_2-hibernate-和-mybatis-有什么区别" tabindex="-1"><a class="header-anchor" href="#_2-hibernate-和-mybatis-有什么区别" aria-hidden="true">#</a> 2. Hibernate 和 MyBatis 有什么区别？</h3><p><strong>相同点</strong></p><ul><li>都是对jdbc的封装，都是应用于持久层的框架。</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/mybatis-4964e454-7c80-4768-bf0e-d0bf417353ef.gif" alt="这还用说？"></p><p><strong>不同点</strong></p><p>1）映射关系</p><ul><li>MyBatis 是一个半自动映射的框架，配置Java对象与sql语句执行结果的对应关系，多表关联关系配置简单</li><li>Hibernate 是一个全表映射的框架，配置Java对象与数据库表的对应关系，多表关联关系配置复杂</li></ul><p>2）<strong>SQL优化和移植性</strong></p><ul><li>Hibernate 对SQL语句封装，提供了日志、缓存、级联（级联比 MyBatis 强大）等特性，此外还提供 HQL（Hibernate Query Language）操作数据库，数据库无关性支持好，但会多消耗性能。如果项目需要支持多种数据库，代码开发量少，但SQL语句优化困难。</li><li>MyBatis 需要手动编写 SQL，支持动态 SQL、处理列表、动态生成表名、支持存储过程。开发工作量相对大些。直接使用SQL语句操作数据库，不支持数据库无关性，但sql语句优化容易。</li></ul><p>3）<strong>MyBatis和Hibernate的适用场景不同</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/mybatis-d1c707f7-0bd0-415c-b190-4757792c072b.png" alt="Mybatis vs Hibernate"></p><ul><li>Hibernate 是标准的ORM框架，SQL编写量较少，但不够灵活，适合于需求相对稳定，中小型的软件项目，比如：办公自动化系统</li><li>MyBatis 是半ORM框架，需要编写较多SQL，但是比较灵活，适合于需求变化频繁，快速迭代的项目，比如：电商网站</li></ul><h3 id="_3-mybatis使用过程-生命周期" tabindex="-1"><a class="header-anchor" href="#_3-mybatis使用过程-生命周期" aria-hidden="true">#</a> 3. MyBatis使用过程？生命周期？</h3><p>MyBatis基本使用的过程大概可以分为这么几步：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/mybatis-47bab2e8-5c08-4f61-9c0c-dddfe09fb2b5.png" alt="Mybatis基本使用步骤"></p><ul><li>1）创建SqlSessionFactory</li></ul><p>可以从配置或者直接编码来创建SqlSessionFactory</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">String</span> resource <span class="token operator">=</span> <span class="token string">&quot;org/mybatis/example/mybatis-config.xml&quot;</span><span class="token punctuation">;</span>
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MyBatis如何执行批量操作？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/mybatis.html#_14-说说mybatis的一级、二级缓存" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="14. 说说Mybatis的一级、二级缓存？"><!---->14. 说说Mybatis的一级、二级缓存？<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/mybatis.html#原理" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="原理"><!---->原理<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/mybatis.html#_15-能说说mybatis的工作原理吗" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="15. 能说说MyBatis的工作原理吗？"><!---->15. 能说说MyBatis的工作原理吗？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/mybatis.html#_16-mybatis的功能架构是什么样的" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="16. MyBatis的功能架构是什么样的？"><!---->16. MyBatis的功能架构是什么样的？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/mybatis.html#_17-为什么mapper接口不需要实现类" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="17. 为什么Mapper接口不需要实现类？"><!---->17. 为什么Mapper接口不需要实现类？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/mybatis.html#_18-mybatis都有哪些executor执行器" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="18.Mybatis都有哪些Executor执行器？"><!---->18.Mybatis都有哪些Executor执行器？<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/mybatis.html#插件" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="插件"><!---->插件<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/mybatis.html#_19-说说mybatis的插件运行原理-如何编写一个插件" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="19. 说说Mybatis的插件运行原理，如何编写一个插件？"><!---->19. 说说Mybatis的插件运行原理，如何编写一个插件？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/mybatis.html#_20-mybatis是如何进行分页的-分页插件的原理是什么" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="20. MyBatis是如何进行分页的？分页插件的原理是什么？"><!---->20. MyBatis是如何进行分页的？分页插件的原理是什么？<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li></ul><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->面渣逆袭（MyBatis）必看</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年6月6日</span><meta property="datePublished" content="2022-06-06T15:31:27.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category3" role>面渣逆袭</li><meta property="articleSection" content="面渣逆袭"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag2" role>MyBatis</li></ul><meta property="keywords" content="MyBatis"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 26 分钟</span><meta property="timeRequired" content="PT26M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/mybatis.html#基础" class="router-link-active router-link-exact-active toc-link level2">基础</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/mybatis.html#_1-说说什么是mybatis" class="router-link-active router-link-exact-active toc-link level3">1. 说说什么是MyBatis?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/mybatis.html#_2-hibernate-和-mybatis-有什么区别" class="router-link-active router-link-exact-active toc-link level3">2. Hibernate 和 MyBatis 有什么区别？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/mybatis.html#_3-mybatis使用过程-生命周期" class="router-link-active router-link-exact-active toc-link level3">3. MyBatis使用过程？生命周期？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/mybatis.html#_4-在mapper中如何传递多个参数" class="router-link-active router-link-exact-active toc-link level3">4. 在mapper中如何传递多个参数？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/mybatis.html#_5-实体类属性名和表中字段名不一样-怎么办" class="router-link-active router-link-exact-active toc-link level3">5. 实体类属性名和表中字段名不一样 ，怎么办?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/mybatis.html#_6-mybatis是否可以映射enum枚举类" class="router-link-active router-link-exact-active toc-link level3">6. Mybatis是否可以映射Enum枚举类？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/mybatis.html#_7-和-的区别" class="router-link-active router-link-exact-active toc-link level3">7. #{}和${}的区别?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/mybatis.html#_8-模糊查询like语句该怎么写" class="router-link-active router-link-exact-active toc-link level3">8. 模糊查询like语句该怎么写?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/mybatis.html#_9-mybatis能执行一对一、一对多的关联查询吗" class="router-link-active router-link-exact-active toc-link level3">9. Mybatis能执行一对一、一对多的关联查询吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/mybatis.html#_10-mybatis是否支持延迟加载-原理" class="router-link-active router-link-exact-active toc-link level3">10. Mybatis是否支持延迟加载？原理？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/mybatis.html#_11-如何获取生成的主键" class="router-link-active router-link-exact-active toc-link level3">11. 如何获取生成的主键?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/mybatis.html#_12-mybatis支持动态sql吗" class="router-link-active router-link-exact-active toc-link level3">12. MyBatis支持动态SQL吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/mybatis.html#_13-mybatis如何执行批量操作" class="router-link-active router-link-exact-active toc-link level3">13. MyBatis如何执行批量操作？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/mybatis.html#_14-说说mybatis的一级、二级缓存" class="router-link-active router-link-exact-active toc-link level3">14. 说说Mybatis的一级、二级缓存？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/mybatis.html#原理" class="router-link-active router-link-exact-active toc-link level2">原理</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/mybatis.html#_15-能说说mybatis的工作原理吗" class="router-link-active router-link-exact-active toc-link level3">15. 能说说MyBatis的工作原理吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/mybatis.html#_16-mybatis的功能架构是什么样的" class="router-link-active router-link-exact-active toc-link level3">16. MyBatis的功能架构是什么样的？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/mybatis.html#_17-为什么mapper接口不需要实现类" class="router-link-active router-link-exact-active toc-link level3">17. 为什么Mapper接口不需要实现类？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/mybatis.html#_18-mybatis都有哪些executor执行器" class="router-link-active router-link-exact-active toc-link level3">18.Mybatis都有哪些Executor执行器？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/mybatis.html#插件" class="router-link-active router-link-exact-active toc-link level2">插件</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/mybatis.html#_19-说说mybatis的插件运行原理-如何编写一个插件" class="router-link-active router-link-exact-active toc-link level3">19. 说说Mybatis的插件运行原理，如何编写一个插件？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/mybatis.html#_20-mybatis是如何进行分页的-分页插件的原理是什么" class="router-link-active router-link-exact-active toc-link level3">20. MyBatis是如何进行分页的？分页插件的原理是什么？</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><blockquote><p>图文详解 20 道MyBatis面试高频题，这次吊打面试官，我觉得稳了（手动 dog）。整理：沉默王二，戳<a href="https://mp.weixin.qq.com/s/en2RgcVx52Ql3tYGLfv3Kw" target="_blank" rel="noopener noreferrer">转载链接<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，作者：三分恶，戳<a href="https://mp.weixin.qq.com/s/O_5Id2o9IP4loPazJuiHng" target="_blank" rel="noopener noreferrer">原文链接<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>。</p></blockquote><p>大家好，我是二哥呀，面渣逆袭系列继续，这节我们的主角是MyBatis，作为当前国内最流行的ORM框架，是我们这些crud选手最趁手的工具，赶紧来看看面试都会问哪些问题吧。</p><h2 id="基础" tabindex="-1"><a class="header-anchor" href="#基础" aria-hidden="true">#</a> 基础</h2><h3 id="_1-说说什么是mybatis" tabindex="-1"><a class="header-anchor" href="#_1-说说什么是mybatis" aria-hidden="true">#</a> 1. 说说什么是MyBatis?</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/mybatis-41c60cf7-6551-4720-8735-290a083640a5.png" alt="MyBatis logo"></p><p><strong>先吹一下</strong>：</p><ul><li>Mybatis 是一个半 ORM（对象关系映射）框架，它内部封装了 JDBC，开发时只需要关注 SQL 语句本身，不需要花费精力去处理加载驱动、创建连接、创建statement 等繁杂的过程。程序员直接编写原生态 sql，可以严格控制 sql 执行性能，灵活度高。</li><li>MyBatis 可以使用 XML 或注解来配置和映射原生信息，将 POJO 映射成数据库中的记录，避免了几乎所有的 JDBC 代码和手动设置参数以及获取结果集。</li></ul><p><strong>再说一下缺点</strong></p><ul><li>SQL语句的编写工作量较大，尤其当字段多、关联表多时，对开发人员编写SQL语句的功底有一定要求</li><li>SQL语句依赖于数据库，导致数据库移植性差，不能随意更换数据库</li></ul><blockquote><p><strong>ORM是什么?</strong></p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/mybatis-ea212850-56e0-4d12-98fb-03bb40007f44.png" alt="ORM简单示意图"></p><ul><li>ORM（Object Relational Mapping），对象关系映射，是一种为了解决关系型数据库数据与简单Java对象（POJO）的映射关系的技术。简单来说，ORM是通过使用描述对象和数据库之间映射的元数据，将程序中的对象自动持久化到关系型数据库中。</li></ul><blockquote><p><strong>为什么说Mybatis是半自动ORM映射工具？它与全自动的区别在哪里？</strong></p></blockquote><ul><li>Hibernate属于全自动ORM映射工具，使用Hibernate查询关联对象或者关联集合对象时，可以根据对象关系模型直接获取，所以它是全自动的。</li><li>而Mybatis在查询关联对象或关联集合对象时，需要手动编写SQL来完成，所以，被称之为半自动ORM映射工具。</li></ul><blockquote><p><strong>JDBC编程有哪些不足之处，MyBatis是如何解决的？</strong></p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/mybatis-f8b181a3-ad40-4381-98ba-351668579bfb.png" alt="JDBC编程的不足"></p><ul><li>1、数据连接创建、释放频繁造成系统资源浪费从而影响系统性能，在mybatis-config.xml中配置数据链接池，使用连接池统一管理数据库连接。</li><li>2、sql语句写在代码中造成代码不易维护，将sql语句配置在XXXXmapper.xml文件中与java代码分离。</li><li>3、向sql语句传参数麻烦，因为sql语句的where条件不一定，可能多也可能少，占位符需要和参数一一对应。Mybatis自动将java对象映射至sql语句。</li><li>4、对结果集解析麻烦，sql变化导致解析代码变化，且解析前需要遍历，如果能将数据库记录封装成pojo对象解析比较方便。Mybatis自动将sql执行结果映射至java对象。</li></ul><h3 id="_2-hibernate-和-mybatis-有什么区别" tabindex="-1"><a class="header-anchor" href="#_2-hibernate-和-mybatis-有什么区别" aria-hidden="true">#</a> 2. Hibernate 和 MyBatis 有什么区别？</h3><p><strong>相同点</strong></p><ul><li>都是对jdbc的封装，都是应用于持久层的框架。</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/mybatis-4964e454-7c80-4768-bf0e-d0bf417353ef.gif" alt="这还用说？"></p><p><strong>不同点</strong></p><p>1）映射关系</p><ul><li>MyBatis 是一个半自动映射的框架，配置Java对象与sql语句执行结果的对应关系，多表关联关系配置简单</li><li>Hibernate 是一个全表映射的框架，配置Java对象与数据库表的对应关系，多表关联关系配置复杂</li></ul><p>2）<strong>SQL优化和移植性</strong></p><ul><li>Hibernate 对SQL语句封装，提供了日志、缓存、级联（级联比 MyBatis 强大）等特性，此外还提供 HQL（Hibernate Query Language）操作数据库，数据库无关性支持好，但会多消耗性能。如果项目需要支持多种数据库，代码开发量少，但SQL语句优化困难。</li><li>MyBatis 需要手动编写 SQL，支持动态 SQL、处理列表、动态生成表名、支持存储过程。开发工作量相对大些。直接使用SQL语句操作数据库，不支持数据库无关性，但sql语句优化容易。</li></ul><p>3）<strong>MyBatis和Hibernate的适用场景不同</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/mybatis-d1c707f7-0bd0-415c-b190-4757792c072b.png" alt="Mybatis vs Hibernate"></p><ul><li>Hibernate 是标准的ORM框架，SQL编写量较少，但不够灵活，适合于需求相对稳定，中小型的软件项目，比如：办公自动化系统</li><li>MyBatis 是半ORM框架，需要编写较多SQL，但是比较灵活，适合于需求变化频繁，快速迭代的项目，比如：电商网站</li></ul><h3 id="_3-mybatis使用过程-生命周期" tabindex="-1"><a class="header-anchor" href="#_3-mybatis使用过程-生命周期" aria-hidden="true">#</a> 3. MyBatis使用过程？生命周期？</h3><p>MyBatis基本使用的过程大概可以分为这么几步：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/mybatis-47bab2e8-5c08-4f61-9c0c-dddfe09fb2b5.png" alt="Mybatis基本使用步骤"></p><ul><li>1）创建SqlSessionFactory</li></ul><p>可以从配置或者直接编码来创建SqlSessionFactory</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">String</span> resource <span class="token operator">=</span> <span class="token string">&quot;org/mybatis/example/mybatis-config.xml&quot;</span><span class="token punctuation">;</span>
 <span class="token class-name">InputStream</span> inputStream <span class="token operator">=</span> <span class="token class-name">Resources</span><span class="token punctuation">.</span><span class="token function">getResourceAsStream</span><span class="token punctuation">(</span>resource<span class="token punctuation">)</span><span class="token punctuation">;</span>
 <span class="token class-name">SqlSessionFactory</span> sqlSessionFactory <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">SqlSessionFactoryBuilder</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">build</span><span class="token punctuation">(</span>inputStream<span class="token punctuation">)</span><span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><ul><li>2）通过SqlSessionFactory创建SqlSession</li></ul><p>SqlSession（会话）可以理解为程序和数据库之间的桥梁</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">SqlSession</span> session <span class="token operator">=</span> sqlSessionFactory<span class="token punctuation">.</span><span class="token function">openSession</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
@@ -405,6 +405,6 @@ var8 <span class="token operator">=</span> <span class="token keyword">new</span
     <span class="token operator">&lt;</span><span class="token operator">/</span>plugin<span class="token operator">&gt;</span>
 <span class="token operator">&lt;</span><span class="token operator">/</span>plugins<span class="token operator">&gt;</span>    
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="_20-mybatis是如何进行分页的-分页插件的原理是什么" tabindex="-1"><a class="header-anchor" href="#_20-mybatis是如何进行分页的-分页插件的原理是什么" aria-hidden="true">#</a> 20. MyBatis是如何进行分页的？分页插件的原理是什么？</h3><blockquote><p><strong>MyBatis是如何分页的？</strong></p></blockquote><p>MyBatis使用RowBounds对象进行分页，它是针对ResultSet结果集执行的内存分页，而非物理分页。可以在sql内直接书写带有物理分页的参数来完成物理分页功能，也可以使用分页插件来完成物理分页。</p><blockquote><p><strong>分页插件的原理是什么？</strong></p></blockquote><ul><li>分页插件的基本原理是使用Mybatis提供的插件接口，实现自定义插件，拦截Executor的query方法</li><li>在执行查询的时候，拦截待执行的sql，然后重写sql，根据dialect方言，添加对应的物理分页语句和物理分页参数。</li><li>举例：<code>select * from student</code>，拦截sql后重写为：<code>select t.* from (select * from student) t limit 0, 10</code></li></ul><p>可以看一下一个大概的MyBatis通用分页拦截器：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/mybatis-0bcdca85-e127-44ff-92e0-368a3f089ec8.png" alt="Mybatis-通用分页拦截器"></p><hr><blockquote><p>图文详解 20 道MyBatis面试高频题，这次吊打面试官，我觉得稳了（手动 dog）。整理：沉默王二，戳<a href="https://mp.weixin.qq.com/s/en2RgcVx52Ql3tYGLfv3Kw" target="_blank" rel="noopener noreferrer">转载链接<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，作者：三分恶，戳<a href="https://mp.weixin.qq.com/s/O_5Id2o9IP4loPazJuiHng" target="_blank" rel="noopener noreferrer">原文链接<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>。</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/sidebar/sanfene/mybatis.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/6/6 下午11:31:27</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/sidebar/sanfene/redis.html" class="nav-link prev" aria-label="Redis"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->Redis</div></a><!----></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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href="/sidebar/sanfene/redis.html#_36-redis有哪些内存溢出控制-内存淘汰策略" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="36.Redis有哪些内存溢出控制/内存淘汰策略？"><!---->36.Redis有哪些内存溢出控制/内存淘汰策略？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/redis.html#_37-redis阻塞-怎么解决" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="37.Redis阻塞？怎么解决？"><!---->37.Redis阻塞？怎么解决？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/redis.html#_38-大key问题了解吗" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="38.大key问题了解吗？"><!---->38.大key问题了解吗？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/redis.html#_39-redis常见性能问题和解决方案" class="router-link-active 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如何实现延时队列?<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/redis.html#_42-redis-支持事务吗" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="42.Redis 支持事务吗？"><!---->42.Redis 支持事务吗？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/redis.html#_43-redis和lua脚本的使用了解吗" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="43.Redis和Lua脚本的使用了解吗？"><!---->43.Redis和Lua脚本的使用了解吗？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/redis.html#_44-redis的管道了解吗" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="44.Redis的管道了解吗？"><!---->44.Redis的管道了解吗？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/redis.html#_45-redis实现分布式锁了解吗" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="45.Redis实现分布式锁了解吗？"><!---->45.Redis实现分布式锁了解吗？<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/redis.html#底层结构" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="底层结构"><!---->底层结构<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/redis.html#_46-说说redis底层数据结构" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="46.说说Redis底层数据结构？"><!---->46.说说Redis底层数据结构？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/redis.html#_47-redis-的-sds-和-c-中字符串相比有什么优势" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="47.Redis 的 SDS 和 C 中字符串相比有什么优势？"><!---->47.Redis 的 SDS 和 C 中字符串相比有什么优势？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/redis.html#_48-字典是如何实现的-rehash-了解吗" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="48.字典是如何实现的？Rehash 了解吗？"><!---->48.字典是如何实现的？Rehash 了解吗？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/redis.html#_49-跳跃表是如何实现的-原理" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="49.跳跃表是如何实现的？原理？"><!---->49.跳跃表是如何实现的？原理？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/redis.html#_50-压缩列表了解吗" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="50.压缩列表了解吗？"><!---->50.压缩列表了解吗？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/redis.html#_51-快速列表-quicklist-了解吗" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="51.快速列表 quicklist 了解吗？"><!---->51.快速列表 quicklist 了解吗？<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/redis.html#其他问题" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="其他问题"><!---->其他问题<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/redis.html#_52-假如redis里面有1亿个key-其中有10w个key是以某个固定的已知的前缀开头的-如何将它们全部找出来" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="52.假如Redis里面有1亿个key，其中有10w个key是以某个固定的已知的前缀开头的，如何将它们全部找出来？"><!---->52.假如Redis里面有1亿个key，其中有10w个key是以某个固定的已知的前缀开头的，如何将它们全部找出来？<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li></ul><!--]--></li><li><!--[--><a href="/sidebar/sanfene/mybatis.html" class="nav-link sidebar-link sidebar-page" aria-label="MyBatis"><!---->MyBatis<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->面渣逆袭（Redis）必看👍</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年5月9日</span><meta property="datePublished" content="2022-05-09T06:49:16.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category3" role>面渣逆袭</li><meta property="articleSection" content="面渣逆袭"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag3" role>Redis</li></ul><meta property="keywords" content="Redis"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 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class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#基础" class="router-link-active router-link-exact-active toc-link level2">基础</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_1-说说什么是redis" class="router-link-active router-link-exact-active toc-link level3">1.说说什么是Redis?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_2-redis可以用来干什么" class="router-link-active router-link-exact-active toc-link level3">2.Redis可以用来干什么？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_3-redis-有哪些数据结构" class="router-link-active router-link-exact-active toc-link level3">3.Redis 有哪些数据结构？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_4-redis为什么快呢" class="router-link-active router-link-exact-active toc-link level3">4.Redis为什么快呢？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_5-能说一下i-o多路复用吗" class="router-link-active router-link-exact-active toc-link level3">5.能说一下I/O多路复用吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_6-redis为什么早期选择单线程" class="router-link-active router-link-exact-active toc-link level3">6. Redis为什么早期选择单线程？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_7-redis6-0使用多线程是怎么回事" class="router-link-active router-link-exact-active toc-link level3">7.Redis6.0使用多线程是怎么回事?</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#持久化" class="router-link-active router-link-exact-active toc-link level2">持久化</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_8-redis持久化方式有哪些-有什么区别" class="router-link-active router-link-exact-active toc-link level3">8.Redis持久化⽅式有哪些？有什么区别？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_9-rdb-和-aof-各自有什么优缺点" class="router-link-active router-link-exact-active toc-link level3">9.RDB 和 AOF 各自有什么优缺点？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_10-rdb和aof如何选择" class="router-link-active router-link-exact-active toc-link level3">10.RDB和AOF如何选择？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_11-redis的数据恢复" class="router-link-active router-link-exact-active toc-link level3">11.Redis的数据恢复？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_12-redis-4-0-的混合持久化了解吗" class="router-link-active router-link-exact-active toc-link level3">12.Redis 4.0 的混合持久化了解吗？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#高可用" class="router-link-active router-link-exact-active toc-link level2">高可用</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_13-主从复制了解吗" class="router-link-active router-link-exact-active toc-link level3">13.主从复制了解吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_14-redis主从有几种常见的拓扑结构" class="router-link-active router-link-exact-active toc-link level3">14.Redis主从有几种常见的拓扑结构？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_15-redis的主从复制原理了解吗" class="router-link-active router-link-exact-active toc-link level3">15.Redis的主从复制原理了解吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_16-说说主从数据同步的方式" class="router-link-active router-link-exact-active toc-link level3">16.说说主从数据同步的方式？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_17-主从复制存在哪些问题呢" class="router-link-active router-link-exact-active toc-link level3">17.主从复制存在哪些问题呢？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_18-redis-sentinel-哨兵-了解吗" class="router-link-active router-link-exact-active toc-link level3">18.Redis Sentinel（哨兵）了解吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_19-redis-sentinel-哨兵-实现原理知道吗" class="router-link-active router-link-exact-active toc-link level3">19.Redis Sentinel（哨兵）实现原理知道吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_20-领导者sentinel节点选举了解吗" class="router-link-active router-link-exact-active toc-link level3">20.领导者Sentinel节点选举了解吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_21-新的主节点是怎样被挑选出来的" class="router-link-active router-link-exact-active toc-link level3">21.新的主节点是怎样被挑选出来的？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_22-redis-集群了解吗" class="router-link-active router-link-exact-active toc-link level3">22.Redis 集群了解吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_23-集群中数据如何分区" class="router-link-active router-link-exact-active toc-link level3">23.集群中数据如何分区？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_24-能说说redis集群的原理吗" class="router-link-active router-link-exact-active toc-link level3">24.能说说Redis集群的原理吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_25-说说集群的伸缩" class="router-link-active router-link-exact-active toc-link level3">25.说说集群的伸缩？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#缓存设计" class="router-link-active router-link-exact-active toc-link level2">缓存设计</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_26-什么是缓存击穿、缓存穿透、缓存雪崩" class="router-link-active router-link-exact-active toc-link level3">26.什么是缓存击穿、缓存穿透、缓存雪崩？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_27-能说说布隆过滤器吗" class="router-link-active router-link-exact-active toc-link level3">27.能说说布隆过滤器吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_28-如何保证缓存和数据库数据的一致性" class="router-link-active router-link-exact-active toc-link level3">28.如何保证缓存和数据库数据的⼀致性？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_29-如何保证本地缓存和分布式缓存的一致" class="router-link-active router-link-exact-active toc-link level3">29.如何保证本地缓存和分布式缓存的一致？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_30-怎么处理热key" class="router-link-active router-link-exact-active toc-link level3">30.怎么处理热key？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_31-缓存预热怎么做呢" class="router-link-active router-link-exact-active toc-link level3">31.缓存预热怎么做呢？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_32-热点key重建-问题-解决" class="router-link-active router-link-exact-active toc-link level3">32.热点key重建？问题？解决？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_33-无底洞问题吗-如何解决" class="router-link-active router-link-exact-active toc-link level3">33.无底洞问题吗？如何解决？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#redis运维" class="router-link-active router-link-exact-active toc-link level2">Redis运维</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_34-redis报内存不足怎么处理" class="router-link-active router-link-exact-active toc-link level3">34.Redis报内存不足怎么处理？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_35-redis的过期数据回收策略有哪些" class="router-link-active router-link-exact-active toc-link level3">35.Redis的过期数据回收策略有哪些？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_36-redis有哪些内存溢出控制-内存淘汰策略" class="router-link-active router-link-exact-active toc-link level3">36.Redis有哪些内存溢出控制/内存淘汰策略？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_37-redis阻塞-怎么解决" class="router-link-active router-link-exact-active toc-link level3">37.Redis阻塞？怎么解决？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_38-大key问题了解吗" class="router-link-active router-link-exact-active toc-link level3">38.大key问题了解吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_39-redis常见性能问题和解决方案" class="router-link-active router-link-exact-active toc-link level3">39.Redis常见性能问题和解决方案？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#redis应用" class="router-link-active router-link-exact-active toc-link level2">Redis应用</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_40-使用redis-如何实现异步队列" class="router-link-active router-link-exact-active toc-link level3">40.使用Redis 如何实现异步队列？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_41-redis-如何实现延时队列" class="router-link-active router-link-exact-active toc-link level3">41.Redis 如何实现延时队列?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_42-redis-支持事务吗" class="router-link-active router-link-exact-active toc-link level3">42.Redis 支持事务吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_43-redis和lua脚本的使用了解吗" class="router-link-active router-link-exact-active toc-link level3">43.Redis和Lua脚本的使用了解吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_44-redis的管道了解吗" class="router-link-active router-link-exact-active toc-link level3">44.Redis的管道了解吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_45-redis实现分布式锁了解吗" class="router-link-active router-link-exact-active toc-link level3">45.Redis实现分布式锁了解吗？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#底层结构" class="router-link-active router-link-exact-active toc-link level2">底层结构</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_46-说说redis底层数据结构" class="router-link-active router-link-exact-active toc-link level3">46.说说Redis底层数据结构？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_47-redis-的-sds-和-c-中字符串相比有什么优势" class="router-link-active router-link-exact-active toc-link level3">47.Redis 的 SDS 和 C 中字符串相比有什么优势？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_48-字典是如何实现的-rehash-了解吗" class="router-link-active router-link-exact-active toc-link level3">48.字典是如何实现的？Rehash 了解吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_49-跳跃表是如何实现的-原理" class="router-link-active router-link-exact-active toc-link level3">49.跳跃表是如何实现的？原理？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_50-压缩列表了解吗" class="router-link-active router-link-exact-active toc-link level3">50.压缩列表了解吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_51-快速列表-quicklist-了解吗" class="router-link-active router-link-exact-active toc-link level3">51.快速列表 quicklist 了解吗？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#其他问题" class="router-link-active router-link-exact-active toc-link level2">其他问题</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_52-假如redis里面有1亿个key-其中有10w个key是以某个固定的已知的前缀开头的-如何将它们全部找出来" class="router-link-active router-link-exact-active toc-link level3">52.假如Redis里面有1亿个key，其中有10w个key是以某个固定的已知的前缀开头的，如何将它们全部找出来？</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="面渣逆袭-redis-必看" tabindex="-1"><a class="header-anchor" href="#面渣逆袭-redis-必看" aria-hidden="true">#</a> 面渣逆袭（Redis）必看👍</h1><blockquote><p>图文详解 53 道Redis面试高频题，这次吊打面试官，我觉得稳了（手动 dog）。整理：沉默王二，戳<a href="https://mp.weixin.qq.com/s/19u34NXALB1nOlBCE6Eg-Q" target="_blank" rel="noopener noreferrer">转载链接<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，作者：三分恶，戳<a href="https://mp.weixin.qq.com/s/iJtNJYgirRugNBnzxkbB4Q" target="_blank" rel="noopener noreferrer">原文链接<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>。</p></blockquote><h2 id="基础" tabindex="-1"><a class="header-anchor" href="#基础" aria-hidden="true">#</a> 基础</h2><h3 id="_1-说说什么是redis" tabindex="-1"><a class="header-anchor" href="#_1-说说什么是redis" aria-hidden="true">#</a> 1.说说什么是Redis?</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-96e079f9-49a3-4c55-b0a4-47d043732b62.png" alt="Redis图标"></p><p>Redis是一种基于键值对（key-value）的NoSQL数据库。</p><p>比一般键值对数据库强大的地方，Redis中的value支持string（字符串）、hash（哈希）、 list（列表）、set（集合）、zset（有序集合）、Bitmaps（位图）、 HyperLogLog、GEO（地理信息定位）等多种数据结构，因此 Redis可以满足很多的应用场景。</p><p>而且因为Redis会将所有数据都存放在内存中，所以它的读写性能非常出色。</p><p>不仅如此，Redis还可以将内存的数据利用快照和日志的形式保存到硬盘上，这样在发生类似断电或者机器故障的时候，内存中的数据不会“丢失”。</p><p>除了上述功能以外，Redis还提供了键过期、发布订阅、事务、流水线、Lua脚本等附加功能。</p><p>总之，Redis是一款强大的性能利器。</p><h3 id="_2-redis可以用来干什么" tabindex="-1"><a class="header-anchor" href="#_2-redis可以用来干什么" aria-hidden="true">#</a> 2.Redis可以用来干什么？</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-b02e44b3-3299-450f-b767-4a862b5ac8ff.png" alt="Redis"></p><ol><li><p>缓存</p><p>这是Redis应用最广泛地方，基本所有的Web应用都会使用Redis作为缓存，来降低数据源压力，提高响应速度。 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-d44c2397-5994-452f-8b7b-eb85d2b87685.png" alt="Redis缓存"></p></li><li><p>计数器 Redis天然支持计数功能，而且计数性能非常好，可以用来记录浏览量、点赞量等等。</p></li><li><p>排行榜 Redis提供了列表和有序集合数据结构，合理地使用这些数据结构可以很方便地构建各种排行榜系统。</p></li><li><p>社交网络 赞/踩、粉丝、共同好友/喜好、推送、下拉刷新。</p></li><li><p>消息队列 Redis提供了发布订阅功能和阻塞队列的功能，可以满足一般消息队列功能。</p></li><li><p>分布式锁 分布式环境下，利用Redis实现分布式锁，也是Redis常见的应用。</p></li></ol><p>Redis的应用一般会结合项目去问，以一个电商项目的用户服务为例：</p><ul><li>Token存储：用户登录成功之后，使用Redis存储Token</li><li>登录失败次数计数：使用Redis计数，登录失败超过一定次数，锁定账号</li><li>地址缓存：对省市区数据的缓存</li><li>分布式锁：分布式环境下登录、注册等操作加分布式锁</li><li>……</li></ul><h3 id="_3-redis-有哪些数据结构" tabindex="-1"><a class="header-anchor" href="#_3-redis-有哪些数据结构" aria-hidden="true">#</a> 3.Redis 有哪些数据结构？</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-10434dc7-c7a3-4c1a-b484-de3fb37669ee.png" alt="Redis基本数据结构"> Redis有五种基本数据结构。</p><p><strong>string</strong></p><p>字符串最基础的数据结构。字符串类型的值实际可以是字符串（简单的字符串、复杂的字符串（例如JSON、XML））、数字 （整数、浮点数），甚至是二进制（图片、音频、视频），但是值最大不能超过512MB。</p><p>字符串主要有以下几个典型使用场景：</p><ul><li>缓存功能</li><li>计数</li><li>共享Session</li><li>限速</li></ul><p><strong>hash</strong></p><p>哈希类型是指键值本身又是一个键值对结构。</p><p>哈希主要有以下典型应用场景：</p><ul><li>缓存用户信息</li><li>缓存对象</li></ul><p><strong>list</strong></p><p>列表（list）类型是用来存储多个有序的字符串。列表是一种比较灵活的数据结构，它可以充当栈和队列的角色</p><p>列表主要有以下几种使用场景：</p><ul><li>消息队列</li><li>文章列表</li></ul><p><strong>set</strong></p><p>集合（set）类型也是用来保存多个的字符串元素，但和列表类型不一 样的是，集合中不允许有重复元素，并且集合中的元素是无序的。</p><p>集合主要有如下使用场景：</p><ul><li>标签（tag）</li><li>共同关注</li></ul><p><strong>sorted set</strong></p><p>有序集合中的元素可以排序。但是它和列表使用索引下标作为排序依据不同的是，它给每个元素设置一个权重（score）作为排序的依据。</p><p>有序集合主要应用场景：</p><ul><li>用户点赞统计</li><li>用户排序</li></ul><h3 id="_4-redis为什么快呢" tabindex="-1"><a class="header-anchor" href="#_4-redis为什么快呢" aria-hidden="true">#</a> 4.Redis为什么快呢？</h3><p>Redis的速度⾮常的快，单机的Redis就可以⽀撑每秒十几万的并发，相对于MySQL来说，性能是MySQL的⼏⼗倍。速度快的原因主要有⼏点：</p><ol><li><strong>完全基于内存操作</strong></li><li>使⽤单线程，避免了线程切换和竞态产生的消耗</li><li>基于⾮阻塞的IO多路复⽤机制</li><li>C语⾔实现，优化过的数据结构，基于⼏种基础的数据结构，redis做了⼤量的优化，性能极⾼ <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-e05bca61-4600-495c-b92a-25ac822e034e.png" alt="Redis使用IO多路复用和自身事件模型"></li></ol><h3 id="_5-能说一下i-o多路复用吗" tabindex="-1"><a class="header-anchor" href="#_5-能说一下i-o多路复用吗" aria-hidden="true">#</a> 5.能说一下I/O多路复用吗？</h3><p>引用知乎上一个高赞的回答来解释什么是I/O多路复用。假设你是一个老师，让30个学生解答一道题目，然后检查学生做的是否正确，你有下面几个选择：</p><ul><li><p>第一种选择：按顺序逐个检查，先检查A，然后是B，之后是C、D。。。这中间如果有一个学生卡住，全班都会被耽误。这种模式就好比，你用循环挨个处理socket，根本不具有并发能力。</p></li><li><p>第二种选择：你创建30个分身，每个分身检查一个学生的答案是否正确。 这种类似于为每一个用户创建一个进程或者- 线程处理连接。</p></li><li><p>第三种选择，你站在讲台上等，谁解答完谁举手。这时C、D举手，表示他们解答问题完毕，你下去依次检查C、D的答案，然后继续回到讲台上等。此时E、A又举手，然后去处理E和A。</p></li></ul><p>第一种就是阻塞IO模型，第三种就是I/O复用模型。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-eb541432-d68a-4dd9-b427-96c4dd607d64.png" alt="多路复用模型"></p><p>Linux系统有三种方式实现IO多路复用：select、poll和epoll。</p><p>例如epoll方式是将用户socket对应的fd注册进epoll，然后epoll帮你监听哪些socket上有消息到达，这样就避免了大量的无用操作。此时的socket应该采用非阻塞模式。</p><p>这样，整个过程只在进行select、poll、epoll这些调用的时候才会阻塞，收发客户消息是不会阻塞的，整个进程或者线程就被充分利用起来，这就是事件驱动，所谓的reactor模式。</p><h3 id="_6-redis为什么早期选择单线程" tabindex="-1"><a class="header-anchor" href="#_6-redis为什么早期选择单线程" aria-hidden="true">#</a> 6. Redis为什么早期选择单线程？</h3><p>官方解释：https://redis.io/topics/faq</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-344b8461-98d4-495b-a697-70275b0abad6.png" alt="官方单线程解释"> 官方FAQ表示，因为Redis是基于内存的操作，CPU成为Redis的瓶颈的情况很少见，Redis的瓶颈最有可能是内存的大小或者网络限制。</p><p>如果想要最大程度利用CPU，可以在一台机器上启动多个Redis实例。</p><p>PS：网上有这样的回答，吐槽官方的解释有些敷衍，其实就是历史原因，开发者嫌多线程麻烦，后来这个CPU的利用问题就被抛给了使用者。</p><p>同时FAQ里还提到了， Redis 4.0 之后开始变成多线程，除了主线程外，它也有后台线程在处理一些较为缓慢的操作，例如清理脏数据、无用连接的释放、大 Key 的删除等等。</p><h3 id="_7-redis6-0使用多线程是怎么回事" tabindex="-1"><a class="header-anchor" href="#_7-redis6-0使用多线程是怎么回事" aria-hidden="true">#</a> 7.Redis6.0使用多线程是怎么回事?</h3><p>Redis不是说用单线程的吗？怎么6.0成了多线程的？</p><p>Redis6.0的多线程是用多线程来处理数据的<strong>读写和协议解析</strong>，但是Redis<strong>执行命令</strong>还是单线程的。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-b7b24e25-d2dc-4457-994f-95bdb3674b8e.png" alt="Redis6.0多线程"> 这样做的⽬的是因为Redis的性能瓶颈在于⽹络IO⽽⾮CPU，使⽤多线程能提升IO读写的效率，从⽽整体提⾼Redis的性能。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><h2 id="持久化" tabindex="-1"><a class="header-anchor" href="#持久化" aria-hidden="true">#</a> 持久化</h2><h3 id="_8-redis持久化方式有哪些-有什么区别" tabindex="-1"><a class="header-anchor" href="#_8-redis持久化方式有哪些-有什么区别" aria-hidden="true">#</a> 8.Redis持久化⽅式有哪些？有什么区别？</h3><p>Redis持久化⽅案分为RDB和AOF两种。 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-3bda4a46-adc3-4f0d-a135-b8ae5d4c0d5d.png" alt="Redis持久化两种方式"></p><p><strong>RDB</strong></p><p>RDB持久化是把当前进程数据生成<strong>快照</strong>保存到硬盘的过程，触发RDB持久化过程分为手动触发和自动触发。</p><p>RDB⽂件是⼀个压缩的⼆进制⽂件，通过它可以还原某个时刻数据库的状态。由于RDB⽂件是保存在硬盘上的，所以即使Redis崩溃或者退出，只要RDB⽂件存在，就可以⽤它来恢复还原数据库的状态。</p><p>手动触发分别对应save和bgsave命令: <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-ffe56e32-34c5-453d-8859-c2febbe6a038.png" alt="save和bgsave"></p><ul><li><p>save命令：阻塞当前Redis服务器，直到RDB过程完成为止，对于内存比较大的实例会造成长时间阻塞，线上环境不建议使用。</p></li><li><p>bgsave命令：Redis进程执行fork操作创建子进程，RDB持久化过程由子进程负责，完成后自动结束。阻塞只发生在fork阶段，一般时间很短。</p></li></ul><p>以下场景会自动触发RDB持久化：</p><ul><li>使用save相关配置，如“save m n”。表示m秒内数据集存在n次修改时，自动触发bgsave。</li><li>如果从节点执行全量复制操作，主节点自动执行bgsave生成RDB文件并发送给从节点</li><li>执行debug reload命令重新加载Redis时，也会自动触发save操作</li><li>默认情况下执行shutdown命令时，如果没有开启AOF持久化功能则自动执行bgsave。</li></ul><p><strong>AOF</strong></p><p>AOF（append only file）持久化：以独立日志的方式记录每次写命令， 重启时再重新执行AOF文件中的命令达到恢复数据的目的。AOF的主要作用是解决了数据持久化的实时性，目前已经是Redis持久化的主流方式。</p><p>AOF的工作流程操作：命令写入 （append）、文件同步（sync）、文件重写（rewrite）、重启加载 （load） <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-a9fb6202-b1a1-484d-a4fa-fef519090b44.png" alt="AOF工作流程">流程如下：</p><p>1）所有的写入命令会追加到aof_buf（缓冲区）中。</p><p>2）AOF缓冲区根据对应的策略向硬盘做同步操作。</p><p>3）随着AOF文件越来越大，需要定期对AOF文件进行重写，达到压缩 的目的。</p><p>4）当Redis服务器重启时，可以加载AOF文件进行数据恢复。</p><h3 id="_9-rdb-和-aof-各自有什么优缺点" tabindex="-1"><a class="header-anchor" href="#_9-rdb-和-aof-各自有什么优缺点" aria-hidden="true">#</a> 9.RDB 和 AOF 各自有什么优缺点？</h3><p><strong>RDB | 优点</strong></p><ol><li>只有一个紧凑的二进制文件 <code>dump.rdb</code>，非常适合备份、全量复制的场景。</li><li><strong>容灾性好</strong>，可以把RDB文件拷贝道远程机器或者文件系统张，用于容灾恢复。</li><li><strong>恢复速度快</strong>，RDB恢复数据的速度远远快于AOF的方式</li></ol><p><strong>RDB | 缺点</strong></p><ol><li><strong>实时性低</strong>，RDB 是间隔一段时间进行持久化，没法做到实时持久化/秒级持久化。如果在这一间隔事件发生故障，数据会丢失。</li><li><strong>存在兼容问题</strong>，Redis演进过程存在多个格式的RDB版本，存在老版本Redis无法兼容新版本RDB的问题。</li></ol><p><strong>AOF | 优点</strong></p><ol><li><strong>实时性好</strong>，aof 持久化可以配置 <code>appendfsync</code> 属性，有 <code>always</code>，每进行一次命令操作就记录到 aof 文件中一次。</li><li>通过 append 模式写文件，即使中途服务器宕机，可以通过 redis-check-aof 工具解决数据一致性问题。</li></ol><p><strong>AOF | 缺点</strong></p><ol><li>AOF 文件比 RDB <strong>文件大</strong>，且 <strong>恢复速度慢</strong>。</li><li><strong>数据集大</strong> 的时候，比 RDB <strong>启动效率低</strong>。</li></ol><h3 id="_10-rdb和aof如何选择" tabindex="-1"><a class="header-anchor" href="#_10-rdb和aof如何选择" aria-hidden="true">#</a> 10.RDB和AOF如何选择？</h3><ul><li>一般来说， 如果想达到足以媲美数据库的 <strong>数据安全性</strong>，应该 <strong>同时使用两种持久化功能</strong>。在这种情况下，当 Redis 重启的时候会优先载入 AOF 文件来恢复原始的数据，因为在通常情况下 AOF 文件保存的数据集要比 RDB 文件保存的数据集要完整。</li><li>如果 <strong>可以接受数分钟以内的数据丢失</strong>，那么可以 <strong>只使用 RDB 持久化</strong>。</li><li>有很多用户都只使用 AOF 持久化，但并不推荐这种方式，因为定时生成 RDB 快照（snapshot）非常便于进行数据备份， 并且 RDB 恢复数据集的速度也要比 AOF 恢复的速度要快，除此之外，使用 RDB 还可以避免 AOF 程序的 bug。</li><li>如果只需要数据在服务器运行的时候存在，也可以不使用任何持久化方式。</li></ul><h3 id="_11-redis的数据恢复" tabindex="-1"><a class="header-anchor" href="#_11-redis的数据恢复" aria-hidden="true">#</a> 11.Redis的数据恢复？</h3><p>当Redis发生了故障，可以从RDB或者AOF中恢复数据。</p><p>恢复的过程也很简单，把RDB或者AOF文件拷贝到Redis的数据目录下，如果使用AOF恢复，配置文件开启AOF，然后启动redis-server即可。 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-f9aab5e9-a875-4316-9ec9-0c5650afe5c1.png" alt="Redis启动加载数据"></p><p><strong>Redis</strong> 启动时加载数据的流程：</p><ol><li>AOF持久化开启且存在AOF文件时，优先加载AOF文件。</li><li>AOF关闭或者AOF文件不存在时，加载RDB文件。</li><li>加载AOF/RDB文件成功后，Redis启动成功。</li><li>AOF/RDB文件存在错误时，Redis启动失败并打印错误信息。</li></ol><h3 id="_12-redis-4-0-的混合持久化了解吗" tabindex="-1"><a class="header-anchor" href="#_12-redis-4-0-的混合持久化了解吗" aria-hidden="true">#</a> 12.Redis 4.0 的混合持久化了解吗？</h3><p>重启 Redis 时，我们很少使用 <code>RDB</code> 来恢复内存状态，因为会丢失大量数据。我们通常使用 AOF 日志重放，但是重放 AOF 日志性能相对 <code>RDB</code> 来说要慢很多，这样在 Redis 实例很大的情况下，启动需要花费很长的时间。</p><p><strong>Redis 4.0</strong> 为了解决这个问题，带来了一个新的持久化选项——<strong>混合持久化</strong>。将 <code>rdb</code> 文件的内容和增量的 AOF 日志文件存在一起。这里的 AOF 日志不再是全量的日志，而是 <strong>自持久化开始到持久化结束</strong> 的这段时间发生的增量 AOF 日志，通常这部分 AOF 日志很小： <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-19c531e5-da95-495a-a4c4-d63a0b8bba95.png" alt="混合持久化"></p><p>于是在 Redis 重启的时候，可以先加载 <code>rdb</code> 的内容，然后再重放增量 AOF 日志就可以完全替代之前的 AOF 全量文件重放，重启效率因此大幅得到提升。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><h2 id="高可用" tabindex="-1"><a class="header-anchor" href="#高可用" aria-hidden="true">#</a> 高可用</h2><p>Redis保证高可用主要有三种方式：主从、哨兵、集群。</p><h3 id="_13-主从复制了解吗" tabindex="-1"><a class="header-anchor" href="#_13-主从复制了解吗" aria-hidden="true">#</a> 13.主从复制了解吗？</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-60497f1e-8afb-44b3-bb7a-d4c29e5ac484.png" alt="Redis主从复制简图"></p><p><strong>主从复制</strong>，是指将一台 Redis 服务器的数据，复制到其他的 Redis 服务器。前者称为 <strong>主节点(master)</strong>，后者称为 <strong>从节点(slave)</strong>。且数据的复制是 <strong>单向</strong> 的，只能由主节点到从节点。Redis 主从复制支持 <strong>主从同步</strong> 和 <strong>从从同步</strong> 两种，后者是 Redis 后续版本新增的功能，以减轻主节点的同步负担。</p><blockquote><p>主从复制主要的作用?</p></blockquote><ul><li><strong>数据冗余：</strong> 主从复制实现了数据的热备份，是持久化之外的一种数据冗余方式。</li><li><strong>故障恢复：</strong> 当主节点出现问题时，可以由从节点提供服务，实现快速的故障恢复 <em>(实际上是一种服务的冗余)</em>。</li><li><strong>负载均衡：</strong> 在主从复制的基础上，配合读写分离，可以由主节点提供写服务，由从节点提供读服务 <em>（即写 Redis 数据时应用连接主节点，读 Redis 数据时应用连接从节点）</em>，分担服务器负载。尤其是在写少读多的场景下，通过多个从节点分担读负载，可以大大提高 Redis 服务器的并发量。</li><li><strong>高可用基石：</strong> 除了上述作用以外，主从复制还是哨兵和集群能够实施的 <strong>基础</strong>，因此说主从复制是 Redis 高可用的基础。</li></ul><h3 id="_14-redis主从有几种常见的拓扑结构" tabindex="-1"><a class="header-anchor" href="#_14-redis主从有几种常见的拓扑结构" aria-hidden="true">#</a> 14.Redis主从有几种常见的拓扑结构？</h3><p>Redis的复制拓扑结构可以支持单层或多层复制关系，根据拓扑复杂性可以分为以下三种：一主一从、一主多从、树状主从结构。</p><p>1.一主一从结构</p><p>一主一从结构是最简单的复制拓扑结构，用于主节点出现宕机时从节点提供故障转移支持。 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-5d91a67c-dbff-4a8d-bf9d-1fe7602d5a27.png" alt="一主一从结构"> 2.一主多从结构</p><p>一主多从结构（又称为星形拓扑结构）使得应用端可以利用多个从节点实现读写分离（见图6-5）。对于读占比较大的场景，可以把读命令发送到从节点来分担主节点压力。 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-71074254-699a-480b-bbb0-c68f364a380b.png" alt="一主多从结构"> 3.树状主从结构</p><p>树状主从结构（又称为树状拓扑结构）使得从节点不但可以复制主节点数据，同时可以作为其他从节点的主节点继续向下层复制。通过引入复制中间层，可以有效降低主节点负载和需要传送给从节点的数据量。 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-dff14203-5e01-4d1b-a775-10ee444ada54.png" alt="树状主从结构"></p><h3 id="_15-redis的主从复制原理了解吗" tabindex="-1"><a class="header-anchor" href="#_15-redis的主从复制原理了解吗" aria-hidden="true">#</a> 15.Redis的主从复制原理了解吗？</h3><p>Redis主从复制的工作流程大概可以分为如下几步： <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-21123b1e-68b4-436b-ac84-3365a49a81bd.png" alt="Redis主从复制工作流程"></p><ol><li>保存主节点（master）信息 这一步只是保存主节点信息，保存主节点的ip和port。</li><li>主从建立连接 从节点（slave）发现新的主节点后，会尝试和主节点建立网络连接。</li><li>发送ping命令 连接建立成功后从节点发送ping请求进行首次通信，主要是检测主从之间网络套接字是否可用、主节点当前是否可接受处理命令。</li><li>权限验证 如果主节点要求密码验证，从节点必须正确的密码才能通过验证。</li><li>同步数据集 主从复制连接正常通信后，主节点会把持有的数据全部发送给从节点。</li><li>命令持续复制 接下来主节点会持续地把写命令发送给从节点，保证主从数据一致性。</li></ol><h3 id="_16-说说主从数据同步的方式" tabindex="-1"><a class="header-anchor" href="#_16-说说主从数据同步的方式" aria-hidden="true">#</a> 16.说说主从数据同步的方式？</h3><p>Redis在2.8及以上版本使用psync命令完成主从数据同步，同步过程分为：全量复制和部分复制。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-7518f715-6dee-4e70-b972-8aed9879e451.png" alt="主从数据同步方式"></p><p><strong>全量复制</strong> 一般用于初次复制场景，Redis早期支持的复制功能只有全量复制，它会把主节点全部数据一次性发送给从节点，当数据量较大时，会对主从节点和网络造成很大的开销。</p><p>全量复制的完整运行流程如下： <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-aa8d2960-b341-49cc-b04c-201241fd15de.png" alt="全量复制"></p><ol><li>发送psync命令进行数据同步，由于是第一次进行复制，从节点没有复制偏移量和主节点的运行ID，所以发送psync-1。</li><li>主节点根据psync-1解析出当前为全量复制，回复+FULLRESYNC响应。</li><li>从节点接收主节点的响应数据保存运行ID和偏移量offset</li><li>主节点执行bgsave保存RDB文件到本地</li><li>主节点发送RDB文件给从节点，从节点把接收的RDB文件保存在本地并直接作为从节点的数据文件</li><li>对于从节点开始接收RDB快照到接收完成期间，主节点仍然响应读写命令，因此主节点会把这期间写命令数据保存在复制客户端缓冲区内，当从节点加载完RDB文件后，主节点再把缓冲区内的数据发送给从节点，保证主从之间数据一致性。</li><li>从节点接收完主节点传送来的全部数据后会清空自身旧数据</li><li>从节点清空数据后开始加载RDB文件</li><li>从节点成功加载完RDB后，如果当前节点开启了AOF持久化功能， 它会立刻做bgrewriteaof操作，为了保证全量复制后AOF持久化文件立刻可用。</li></ol><p><strong>部分复制</strong> 部分复制主要是Redis针对全量复制的过高开销做出的一种优化措施， 使用psync{runId}{offset}命令实现。当从节点（slave）正在复制主节点 （master）时，如果出现网络闪断或者命令丢失等异常情况时，从节点会向 主节点要求补发丢失的命令数据，如果主节点的复制积压缓冲区内存在这部分数据则直接发送给从节点，这样就可以保持主从节点复制的一致性。 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-87600c72-cc6a-4656-81b2-e71864c97f23.png" alt="部分复制"></p><ol><li>当主从节点之间网络出现中断时，如果超过repl-timeout时间，主节点会认为从节点故障并中断复制连接</li><li>主从连接中断期间主节点依然响应命令，但因复制连接中断命令无法发送给从节点，不过主节点内部存在的复制积压缓冲区，依然可以保存最近一段时间的写命令数据，默认最大缓存1MB。</li><li>当主从节点网络恢复后，从节点会再次连上主节点</li><li>当主从连接恢复后，由于从节点之前保存了自身已复制的偏移量和主节点的运行ID。因此会把它们当作psync参数发送给主节点，要求进行部分复制操作。</li><li>主节点接到psync命令后首先核对参数runId是否与自身一致，如果一 致，说明之前复制的是当前主节点；之后根据参数offset在自身复制积压缓冲区查找，如果偏移量之后的数据存在缓冲区中，则对从节点发送+CONTINUE响应，表示可以进行部分复制。</li><li>主节点根据偏移量把复制积压缓冲区里的数据发送给从节点，保证主从复制进入正常状态。</li></ol><h3 id="_17-主从复制存在哪些问题呢" tabindex="-1"><a class="header-anchor" href="#_17-主从复制存在哪些问题呢" aria-hidden="true">#</a> 17.主从复制存在哪些问题呢？</h3><p>主从复制虽好，但也存在一些问题：</p><ul><li>一旦主节点出现故障，需要手动将一个从节点晋升为主节点，同时需要修改应用方的主节点地址，还需要命令其他从节点去复制新的主节点，整个过程都需要人工干预。</li><li>主节点的写能力受到单机的限制。</li><li>主节点的存储能力受到单机的限制。</li></ul><p>第一个问题是Redis的高可用问题，第二、三个问题属于Redis的分布式问题。</p><h3 id="_18-redis-sentinel-哨兵-了解吗" tabindex="-1"><a class="header-anchor" href="#_18-redis-sentinel-哨兵-了解吗" aria-hidden="true">#</a> 18.Redis Sentinel（哨兵）了解吗？</h3><p>主从复制存在一个问题，没法完成自动故障转移。所以我们需要一个方案来完成自动故障转移，它就是Redis Sentinel（哨兵）。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-8b1a055c-f077-49ff-9432-c194d4fc3639.png" alt="Redis Sentinel"></p><p>Redis Sentinel ，它由两部分组成，哨兵节点和数据节点：</p><ul><li><strong>哨兵节点：</strong> 哨兵系统由一个或多个哨兵节点组成，哨兵节点是特殊的 Redis 节点，不存储数据，对数据节点进行监控。</li><li><strong>数据节点：</strong> 主节点和从节点都是数据节点；</li></ul><p>在复制的基础上，哨兵实现了 <strong>自动化的故障恢复</strong> 功能，下面是官方对于哨兵功能的描述：</p><ul><li><strong>监控（Monitoring）：</strong> 哨兵会不断地检查主节点和从节点是否运作正常。</li><li><strong>自动故障转移（Automatic failover）：</strong> 当 <strong>主节点</strong> 不能正常工作时，哨兵会开始 <strong>自动故障转移操作</strong>，它会将失效主节点的其中一个 <strong>从节点升级为新的主节点</strong>，并让其他从节点改为复制新的主节点。</li><li><strong>配置提供者（Configuration provider）：</strong> 客户端在初始化时，通过连接哨兵来获得当前 Redis 服务的主节点地址。</li><li><strong>通知（Notification）：</strong> 哨兵可以将故障转移的结果发送给客户端。</li></ul><p>其中，监控和自动故障转移功能，使得哨兵可以及时发现主节点故障并完成转移。而配置提供者和通知功能，则需要在与客户端的交互中才能体现。</p><h3 id="_19-redis-sentinel-哨兵-实现原理知道吗" tabindex="-1"><a class="header-anchor" href="#_19-redis-sentinel-哨兵-实现原理知道吗" aria-hidden="true">#</a> 19.Redis Sentinel（哨兵）实现原理知道吗？</h3><p>哨兵模式是通过哨兵节点完成对数据节点的监控、下线、故障转移。 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-4074d72a-886a-4892-8f55-80112005aad8.png" alt="Redis Sentinel工作流程"></p><ul><li><strong>定时监控</strong><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-e7708f8d-ef34-4255-b5d0-cb300c649716.png" alt="三个定时任务">Redis Sentinel通过三个定时监控任务完成对各个节点发现和监控： <ol><li>每隔10秒，每个Sentinel节点会向主节点和从节点发送info命令获取最新的拓扑结构</li><li>每隔2秒，每个Sentinel节点会向Redis数据节点的__sentinel__：hello 频道上发送该Sentinel节点对于主节点的判断以及当前Sentinel节点的信息</li><li>每隔1秒，每个Sentinel节点会向主节点、从节点、其余Sentinel节点发送一条ping命令做一次心跳检测，来确认这些节点当前是否可达</li></ol></li><li><strong>主观下线和客观下线</strong> 主观下线就是哨兵节点认为某个节点有问题，客观下线就是超过一定数量的哨兵节点认为主节点有问题。 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-11839a24-9249-48a5-8c9d-888aa80d91dc.png" alt="主观下线和客观下线"></li></ul><ol><li><p>主观下线 每个Sentinel节点会每隔1秒对主节点、从节点、其他Sentinel节点发送ping命令做心跳检测，当这些节点超过 down-after-milliseconds没有进行有效回复，Sentinel节点就会对该节点做失败判定，这个行为叫做主观下线。</p></li><li><p>客观下线 当Sentinel主观下线的节点是主节点时，该Sentinel节点会通过sentinel is- master-down-by-addr命令向其他Sentinel节点询问对主节点的判断，当超过 &lt;quorum&gt;个数，Sentinel节点认为主节点确实有问题，这时该Sentinel节点会做出客观下线的决定</p></li></ol><ul><li><p><strong>领导者Sentinel节点选举</strong> Sentinel节点之间会做一个领导者选举的工作，选出一个Sentinel节点作为领导者进行故障转移的工作。Redis使用了Raft算法实现领导者选举。</p></li><li><p><strong>故障转移</strong></p><p>领导者选举出的Sentinel节点负责故障转移，过程如下： <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-0618a5e2-e94f-40d7-888a-e78019ba8f93.png" alt="故障转移"></p><ol><li>在从节点列表中选出一个节点作为新的主节点，这一步是相对复杂一些的一步</li><li>Sentinel领导者节点会对第一步选出来的从节点执行slaveof no one命令让其成为主节点</li><li>Sentinel领导者节点会向剩余的从节点发送命令，让它们成为新主节点的从节点</li><li>Sentinel节点集合会将原来的主节点更新为从节点，并保持着对其关注，当其恢复后命令它去复制新的主节点</li></ol></li></ul><h3 id="_20-领导者sentinel节点选举了解吗" tabindex="-1"><a class="header-anchor" href="#_20-领导者sentinel节点选举了解吗" aria-hidden="true">#</a> 20.领导者Sentinel节点选举了解吗？</h3><p>Redis使用了Raft算法实 现领导者选举，大致流程如下： <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-6586ae3c-6b33-4c9f-8137-f02fc0e6cfae.png" alt="领导者Sentinel节点选举"></p><ol><li>每个在线的Sentinel节点都有资格成为领导者，当它确认主节点主观 下线时候，会向其他Sentinel节点发送sentinel is-master-down-by-addr命令， 要求将自己设置为领导者。</li><li>收到命令的Sentinel节点，如果没有同意过其他Sentinel节点的sentinel is-master-down-by-addr命令，将同意该请求，否则拒绝。</li><li>如果该Sentinel节点发现自己的票数已经大于等于max（quorum， num（sentinels）/2+1），那么它将成为领导者。</li><li>如果此过程没有选举出领导者，将进入下一次选举。</li></ol><h3 id="_21-新的主节点是怎样被挑选出来的" tabindex="-1"><a class="header-anchor" href="#_21-新的主节点是怎样被挑选出来的" aria-hidden="true">#</a> 21.新的主节点是怎样被挑选出来的？</h3><p>选出新的主节点，大概分为这么几步： <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-03976d35-20b6-4efe-aa9c-7d3759460d34.png" alt="新的主节点"></p><ol><li>过滤：“不健康”（主观下线、断线）、5秒内没有回复过Sentinel节 点ping响应、与主节点失联超过down-after-milliseconds*10秒。</li><li>选择slave-priority（从节点优先级）最高的从节点列表，如果存在则返回，不存在则继续。</li><li>选择复制偏移量最大的从节点（复制的最完整），如果存在则返 回，不存在则继续。</li><li>选择runid最小的从节点。</li></ol><h3 id="_22-redis-集群了解吗" tabindex="-1"><a class="header-anchor" href="#_22-redis-集群了解吗" aria-hidden="true">#</a> 22.Redis 集群了解吗？</h3><p>前面说到了主从存在高可用和分布式的问题，哨兵解决了高可用的问题，而集群就是终极方案，一举解决高可用和分布式问题。 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-5cbc6009-251e-4d5b-8f22-8d543938eccb.png" alt="Redis 集群示意图"></p><ol><li><p><strong>数据分区：</strong> 数据分区 <em>(或称数据分片)</em> 是集群最核心的功能。集群将数据分散到多个节点，一方面 突破了 Redis 单机内存大小的限制，<strong>存储容量大大增加</strong>；<strong>另一方面</strong> 每个主节点都可以对外提供读服务和写服务，<strong>大大提高了集群的响应能力</strong>。</p></li><li><p><strong>高可用：</strong> 集群支持主从复制和主节点的 <strong>自动故障转移</strong> <em>（与哨兵类似）</em>，当任一节点发生故障时，集群仍然可以对外提供服务。</p></li></ol><h3 id="_23-集群中数据如何分区" tabindex="-1"><a class="header-anchor" href="#_23-集群中数据如何分区" aria-hidden="true">#</a> 23.集群中数据如何分区？</h3><p>分布式的存储中，要把数据集按照分区规则映射到多个节点，常见的数据分区规则三种： <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-ceb49e41-dfd7-4d1e-91f9-c299437227d2.png" alt="分布式数据分区"></p><h5 id="方案一-节点取余分区" tabindex="-1"><a class="header-anchor" href="#方案一-节点取余分区" aria-hidden="true">#</a> 方案一：节点取余分区</h5><p>节点取余分区，非常好理解，使用特定的数据，比如Redis的键，或者用户ID之类，对响应的hash值取余：hash（key）%N，来确定数据映射到哪一个节点上。</p><p>不过该方案最大的问题是，当节点数量变化时，如扩容或收缩节点，数据节点映射关 系需要重新计算，会导致数据的重新迁移。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-8b1fcaec-37e6-420a-9ca2-03615232af17.png" alt="节点取余分区"></p><h5 id="方案二-一致性哈希分区" tabindex="-1"><a class="header-anchor" href="#方案二-一致性哈希分区" aria-hidden="true">#</a> 方案二：一致性哈希分区</h5><p>将整个 Hash 值空间组织成一个虚拟的圆环，然后将缓存节点的 IP 地址或者主机名做 Hash 取值后，放置在这个圆环上。当我们需要确定某一个 Key 需 要存取到哪个节点上的时候，先对这个 Key 做同样的 Hash 取值，确定在环上的位置，然后按照顺时针方向在环上“行走”，遇到的第一个缓存节点就是要访问的节点。</p><p>比如说下面 这张图里面，Key 1 和 Key 2 会落入到 Node 1 中，Key 3、Key 4 会落入到 Node 2 中，Key 5 落入到 Node 3 中，Key 6 落入到 Node 4 中。 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-89bd1c1c-251c-4f53-bba3-fe945b2ae9e2.png" alt="一致性哈希分区"></p><p>这种方式相比节点取余最大的好处在于加入和删除节点只影响哈希环中 相邻的节点，对其他节点无影响。</p><p>但它还是存在问题：</p><ul><li>缓存节点在圆环上分布不平均，会造成部分缓存节点的压力较大</li><li>当某个节点故障时，这个节点所要承担的所有访问都会被顺移到另一个节点上，会对后面这个节点造成力。</li></ul><h5 id="方案三-虚拟槽分区" tabindex="-1"><a class="header-anchor" href="#方案三-虚拟槽分区" aria-hidden="true">#</a> 方案三：虚拟槽分区</h5><p>这个方案 一致性哈希分区的基础上，引入了 <strong>虚拟节点</strong> 的概念。Redis 集群使用的便是该方案，其中的虚拟节点称为 <strong>槽（slot）</strong>。槽是介于数据和实际节点之间的虚拟概念，每个实际节点包含一定数量的槽，每个槽包含哈希值在一定范围内的数据。 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-e0ed9d62-3406-40db-8b01-c931f1020612.png" alt="虚拟槽分配"></p><p>在使用了槽的一致性哈希分区中，槽是数据管理和迁移的基本单位。槽解耦了数据和实际节点 之间的关系，增加或删除节点对系统的影响很小。仍以上图为例，系统中有 <code>4</code> 个实际节点，假设为其分配 <code>16</code> 个槽(0-15)；</p><ul><li>槽 0-3 位于 node1；4-7 位于 node2；以此类推....</li></ul><p>如果此时删除 <code>node2</code>，只需要将槽 4-7 重新分配即可，例如槽 4-5 分配给 <code>node1</code>，槽 6 分配给 <code>node3</code>，槽 7 分配给 <code>node4</code>，数据在其他节点的分布仍然较为均衡。</p><h3 id="_24-能说说redis集群的原理吗" tabindex="-1"><a class="header-anchor" href="#_24-能说说redis集群的原理吗" aria-hidden="true">#</a> 24.能说说Redis集群的原理吗？</h3><p>Redis集群通过数据分区来实现数据的分布式存储，通过自动故障转移实现高可用。</p><h5 id="集群创建" tabindex="-1"><a class="header-anchor" href="#集群创建" aria-hidden="true">#</a> 集群创建</h5><p>数据分区是在集群创建的时候完成的。 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-046a512c-baab-4e3a-9409-2af58088cceb.png" alt="集群创建"></p><p><strong>设置节点</strong> Redis集群一般由多个节点组成，节点数量至少为6个才能保证组成完整高可用的集群。每个节点需要开启配置cluster-enabled yes，让Redis运行在集群模式下。 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-e6064ba6-fd6f-4270-92f9-68c0bb98fd4b.png" alt="节点和握手"><strong>节点握手</strong> 节点握手是指一批运行在集群模式下的节点通过Gossip协议彼此通信， 达到感知对方的过程。节点握手是集群彼此通信的第一步，由客户端发起命 令：cluster meet{ip}{port}。完成节点握手之后，一个个的Redis节点就组成了一个多节点的集群。</p><p><strong>分配槽（slot）</strong> Redis集群把所有的数据映射到16384个槽中。每个节点对应若干个槽，只有当节点分配了槽，才能响应和这些槽关联的键命令。通过 cluster addslots命令为节点分配槽。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-15341792-e7a6-428c-a109-22827e02be5f.png" alt="分配槽"></p><h5 id="故障转移" tabindex="-1"><a class="header-anchor" href="#故障转移" aria-hidden="true">#</a> 故障转移</h5><p>Redis集群的故障转移和哨兵的故障转移类似，但是Redis集群中所有的节点都要承担状态维护的任务。</p><p><strong>故障发现</strong> Redis集群内节点通过ping/pong消息实现节点通信，集群中每个节点都会定期向其他节点发送ping消息，接收节点回复pong 消息作为响应。如果在cluster-node-timeout时间内通信一直失败，则发送节 点会认为接收节点存在故障，把接收节点标记为主观下线（pfail）状态。 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-84a2a89e-f9ea-4681-b748-1a4f1dee172b.png" alt="主观下线"> 当某个节点判断另一个节点主观下线后，相应的节点状态会跟随消息在集群内传播。通过Gossip消息传播，集群内节点不断收集到故障节点的下线报告。当 半数以上持有槽的主节点都标记某个节点是主观下线时。触发客观下线流程。 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-b61a6109-7aea-45ab-a53c-267eebb9180a.png" alt="主观下线和客观下线"></p><p><strong>故障恢复</strong></p><p>故障节点变为客观下线后，如果下线节点是持有槽的主节点则需要在它 的从节点中选出一个替换它，从而保证集群的高可用。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-0e5a49b3-cb5a-4aef-a81f-fce50a012a39.png" alt="故障恢复流程"></p><ol><li>资格检查 每个从节点都要检查最后与主节点断线时间，判断是否有资格替换故障 的主节点。</li><li>准备选举时间 当从节点符合故障转移资格后，更新触发故障选举的时间，只有到达该 时间后才能执行后续流程。</li><li>发起选举 当从节点定时任务检测到达故障选举时间（failover_auth_time）到达后，发起选举流程。</li><li>选举投票 持有槽的主节点处理故障选举消息。投票过程其实是一个领导者选举的过程，如集群内有N个持有槽的主节 点代表有N张选票。由于在每个配置纪元内持有槽的主节点只能投票给一个 从节点，因此只能有一个从节点获得N/2+1的选票，保证能够找出唯一的从节点。 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-d0e16ea3-6683-43f4-82a3-80478703ae06.png" alt="选举投票"></li><li>替换主节点 当从节点收集到足够的选票之后，触发替换主节点操作。</li></ol><blockquote><p><strong>部署Redis集群至少需要几个物理节点？</strong></p></blockquote><p>在投票选举的环节，故障主节点也算在投票数内，假设集群内节点规模是3主3从，其中有2 个主节点部署在一台机器上，当这台机器宕机时，由于从节点无法收集到 3/2+1个主节点选票将导致故障转移失败。这个问题也适用于故障发现环节。因此部署集群时所有主节点最少需要部署在3台物理机上才能避免单点问题。</p><h3 id="_25-说说集群的伸缩" tabindex="-1"><a class="header-anchor" href="#_25-说说集群的伸缩" aria-hidden="true">#</a> 25.说说集群的伸缩？</h3><p>Redis集群提供了灵活的节点扩容和收缩方案，可以在不影响集群对外服务的情况下，为集群添加节点进行扩容也可以下线部分节点进行缩容。 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-dd3e9494-eddb-4861-85f7-2646018d93f6.png" alt="集群的伸缩">其实，集群扩容和缩容的关键点，就在于槽和节点的对应关系，扩容和缩容就是将一部分<code>槽</code>和<code>数据</code>迁移给新节点。</p><p>例如下面一个集群，每个节点对应若干个槽，每个槽对应一定的数据，如果希望加入1个节点希望实现集群扩容时，需要通过相关命令把一部分槽和内容迁移给新节点。 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-1d24bb63-2b05-4db9-bd6b-983f16a4830e.png" alt="扩容实例">缩容也是类似，先把槽和数据迁移到其它节点，再把对应的节点下线。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><h2 id="缓存设计" tabindex="-1"><a class="header-anchor" href="#缓存设计" aria-hidden="true">#</a> 缓存设计</h2><h3 id="_26-什么是缓存击穿、缓存穿透、缓存雪崩" tabindex="-1"><a class="header-anchor" href="#_26-什么是缓存击穿、缓存穿透、缓存雪崩" aria-hidden="true">#</a> 26.什么是缓存击穿、缓存穿透、缓存雪崩？</h3><p>PS:这是多年黄历的老八股了，一定要理解清楚。</p><h5 id="缓存击穿" tabindex="-1"><a class="header-anchor" href="#缓存击穿" aria-hidden="true">#</a> 缓存击穿</h5><p>一个并发访问量比较大的key在某个时间过期，导致所有的请求直接打在DB上。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-86579ee6-9dae-4274-a5cc-af6812f48da4.png" alt="缓存击穿"> 解决⽅案：</p><ol><li><p>加锁更新，⽐如请求查询A，发现缓存中没有，对A这个key加锁，同时去数据库查询数据，写⼊缓存，再返回给⽤户，这样后⾯的请求就可以从缓存中拿到数据了。 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-cf63911a-8501-493e-a375-8b47a9f33358.png" alt="加锁更新"></p></li><li><p>将过期时间组合写在value中，通过异步的⽅式不断的刷新过期时间，防⽌此类现象。</p></li></ol><h5 id="缓存穿透" tabindex="-1"><a class="header-anchor" href="#缓存穿透" aria-hidden="true">#</a> 缓存穿透</h5><p>缓存穿透指的查询缓存和数据库中都不存在的数据，这样每次请求直接打到数据库，就好像缓存不存在一样。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-029951e6-8b99-4364-a570-010853deb594.png" alt="缓存穿透"> 缓存穿透将导致不存在的数据每次请求都要到存储层去查询，失去了缓存保护后端存储的意义。</p><p>缓存穿透可能会使后端存储负载加大，如果发现大量存储层空命中，可能就是出现了缓存穿透问题。</p><p>缓存穿透可能有两种原因：</p><ol><li>自身业务代码问题</li><li>恶意攻击，爬虫造成空命中</li></ol><p>它主要有两种解决办法：</p><ul><li><strong>缓存空值/默认值</strong></li></ul><p>一种方式是在数据库不命中之后，把一个空对象或者默认值保存到缓存，之后再访问这个数据，就会从缓存中获取，这样就保护了数据库。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-288af5a2-ae5a-427a-95e9-b4a658b01386.png" alt="缓存空值/默认值"></p><p>缓存空值有两大问题：</p><ol><li><p>空值做了缓存，意味着缓存层中存了更多的键，需要更多的内存空间（如果是攻击，问题更严重），比较有效的方法是针对这类数据设置一个较短的过期时间，让其自动剔除。</p></li><li><p>缓存层和存储层的数据会有一段时间窗口的不一致，可能会对业务有一定影响。 例如过期时间设置为5分钟，如果此时存储层添加了这个数据，那此段时间就会出现缓存层和存储层数据的不一致。 这时候可以利用消息队列或者其它异步方式清理缓存中的空对象。</p></li></ol><ul><li><strong>布隆过滤器</strong> 除了缓存空对象，我们还可以在存储和缓存之前，加一个布隆过滤器，做一层过滤。</li></ul><p>布隆过滤器里会保存数据是否存在，如果判断数据不不能再，就不会访问存储。 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-0e18ea40-a2e5-4fa6-989e-e771f6e4b0fc.png" alt="布隆过滤器"> 两种解决方案的对比： <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-e8a382c9-4379-44ab-b1dc-fb598a228105.png" alt="缓存空对象核布隆过滤器方案对比"></p><h5 id="缓存雪崩" tabindex="-1"><a class="header-anchor" href="#缓存雪崩" aria-hidden="true">#</a> 缓存雪崩</h5><p>某⼀时刻发⽣⼤规模的缓存失效的情况，例如缓存服务宕机、大量key在同一时间过期，这样的后果就是⼤量的请求进来直接打到DB上，可能导致整个系统的崩溃，称为雪崩。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-1464fe22-c463-4850-8989-b899510cb10e.png" alt="缓存雪崩"> 缓存雪崩是三大缓存问题里最严重的一种，我们来看看怎么预防和处理。</p><ul><li><strong>提高缓存可用性</strong></li></ul><ol><li>集群部署：通过集群来提升缓存的可用性，可以利用Redis本身的Redis Cluster或者第三方集群方案如Codis等。</li><li>多级缓存：设置多级缓存，第一级缓存失效的基础上，访问二级缓存，每一级缓存的失效时间都不同。</li></ol><ul><li><strong>过期时间</strong></li></ul><ol><li>均匀过期：为了避免大量的缓存在同一时间过期，可以把不同的 key 过期时间随机生成，避免过期时间太过集中。</li><li>热点数据永不过期。</li></ol><ul><li><strong>熔断降级</strong></li></ul><ol><li>服务熔断：当缓存服务器宕机或超时响应时，为了防止整个系统出现雪崩，暂时停止业务服务访问缓存系统。</li><li>服务降级：当出现大量缓存失效，而且处在高并发高负荷的情况下，在业务系统内部暂时舍弃对一些非核心的接口和数据的请求，而直接返回一个提前准备好的 fallback（退路）错误处理信息。</li></ol><h3 id="_27-能说说布隆过滤器吗" tabindex="-1"><a class="header-anchor" href="#_27-能说说布隆过滤器吗" aria-hidden="true">#</a> 27.能说说布隆过滤器吗？</h3><p>布隆过滤器，它是一个连续的数据结构，每个存储位存储都是一个<code>bit</code>，即<code>0</code>或者<code>1</code>, 来标识数据是否存在。</p><p>存储数据的时时候，使用K个不同的哈希函数将这个变量映射为bit列表的的K个点，把它们置为1。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-d0b8d85c-85dc-4843-b4be-d5d48338a44e.png" alt="布隆过滤器">我们判断缓存key是否存在，同样，K个哈希函数，映射到bit列表上的K个点，判断是不是1：</p><ul><li>如果全不是1，那么key不存在；</li><li>如果都是1，也只是表示key可能存在。</li></ul><p>布隆过滤器也有一些缺点：</p><ol><li>它在判断元素是否在集合中时是有一定错误几率，因为哈希算法有一定的碰撞的概率。</li><li>不支持删除元素。</li></ol><h3 id="_28-如何保证缓存和数据库数据的一致性" tabindex="-1"><a class="header-anchor" href="#_28-如何保证缓存和数据库数据的一致性" aria-hidden="true">#</a> 28.如何保证缓存和数据库数据的⼀致性？</h3><p>根据CAP理论，在保证可用性和分区容错性的前提下，无法保证一致性，所以缓存和数据库的绝对一致是不可能实现的，只能尽可能保存缓存和数据库的最终一致性。</p><h5 id="选择合适的缓存更新策略" tabindex="-1"><a class="header-anchor" href="#选择合适的缓存更新策略" aria-hidden="true">#</a> 选择合适的缓存更新策略</h5><p><strong>1. 删除缓存而不是更新缓存</strong></p><p>当一个线程对缓存的key进行写操作的时候，如果其它线程进来读数据库的时候，读到的就是脏数据，产生了数据不一致问题。</p><p>相比较而言，删除缓存的速度比更新缓存的速度快很多，所用时间相对也少很多，读脏数据的概率也小很多。 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-ebad0a67-3012-4466-a4dc-e834104c48f8.png" alt="删除缓存和更新缓存"></p><ol start="2"><li><strong>先更数据，后删缓存</strong> 先更数据库还是先删缓存？这是一个问题。</li></ol><p>更新数据，耗时可能在删除缓存的百倍以上。在缓存中不存在对应的key，数据库又没有完成更新的时候，如果有线程进来读取数据，并写入到缓存，那么在更新成功之后，这个key就是一个脏数据。</p><p>毫无疑问，先删缓存，再更数据库，缓存中key不存在的时间的时间更长，有更大的概率会产生脏数据。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-5c929a9e-a723-43b3-8f3c-f22c83765f9d.png" alt="先更数据库还是先删缓存">目前最流行的缓存读写策略cache-aside-pattern就是采用先更数据库，再删缓存的方式。</p><h5 id="缓存不一致处理" tabindex="-1"><a class="header-anchor" href="#缓存不一致处理" aria-hidden="true">#</a> 缓存不一致处理</h5><p>如果不是并发特别高，对缓存依赖性很强，其实一定程序的不一致是可以接受的。</p><p>但是如果对一致性要求比较高，那就得想办法保证缓存和数据库中数据一致。</p><p>缓存和数据库数据不一致常见的两种原因：</p><ul><li>缓存key删除失败</li><li>并发导致写入了脏数据</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-51b3453e-e1f1-4c65-9879-2aa59df23eca.png" alt="缓存一致性"></p><p><strong>消息队列保证key被删除</strong> 可以引入消息队列，把要删除的key或者删除失败的key丢尽消息队列，利用消息队列的重试机制，重试删除对应的key。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-e4a61193-515a-409f-a436-2733abc3a86e.png" alt="消息队列保证key被删除">这种方案看起来不错，缺点是对业务代码有一定的侵入性。</p><p><strong>数据库订阅+消息队列保证key被删除</strong> 可以用一个服务（比如阿里的 canal）去监听数据库的binlog，获取需要操作的数据。</p><p>然后用一个公共的服务获取订阅程序传来的信息，进行缓存删除操作。 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-37c07418-9cd8-43d9-90e7-0cb43b329025.png" alt="数据库订阅+消息队列保证key被删除"> 这种方式降低了对业务的侵入，但其实整个系统的复杂度是提升的，适合基建完善的大厂。</p><p><strong>延时双删防止脏数据</strong> 还有一种情况，是在缓存不存在的时候，写入了脏数据，这种情况在先删缓存，再更数据库的缓存更新策略下发生的比较多，解决方案是延时双删。</p><p>简单说，就是在第一次删除缓存之后，过了一段时间之后，再次删除缓存。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-fab24753-9c53-4432-9413-5feba07ae1e3.png" alt="延时双删"></p><p>这种方式的延时时间设置需要仔细考量和测试。</p><p><strong>设置缓存过期时间兜底</strong></p><p>这是一个朴素但是有用的办法，给缓存设置一个合理的过期时间，即使发生了缓存数据不一致的问题，它也不会永远不一致下去，缓存过期的时候，自然又会恢复一致。</p><h3 id="_29-如何保证本地缓存和分布式缓存的一致" tabindex="-1"><a class="header-anchor" href="#_29-如何保证本地缓存和分布式缓存的一致" aria-hidden="true">#</a> 29.如何保证本地缓存和分布式缓存的一致？</h3><p>PS:这道题面试很少问，但实际工作中很常见。</p><p>在日常的开发中，我们常常采用两级缓存：本地缓存+分布式缓存。</p><p>所谓本地缓存，就是对应服务器的内存缓存，比如Caffeine，分布式缓存基本就是采用Redis。</p><p>那么问题来了，本地缓存和分布式缓存怎么保持数据一致？ <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-6d4ab7e6-8337-4576-bbf0-79202a1c3331.png" alt="延时双删"> Redis缓存，数据库发生更新，直接删除缓存的key即可，因为对于应用系统而言，它是一种中心化的缓存。</p><p>但是本地缓存，它是非中心化的，散落在分布式服务的各个节点上，没法通过客户端的请求删除本地缓存的key，所以得想办法通知集群所有节点，删除对应的本地缓存key。 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-20c15f0d-fb3c-4922-94b1-edcd856658be.png" alt="本地缓存/分布式缓存保持一致"></p><p>可以采用消息队列的方式：</p><ol><li>采用Redis本身的Pub/Sub机制，分布式集群的所有节点订阅删除本地缓存频道，删除Redis缓存的节点，同事发布删除本地缓存消息，订阅者们订阅到消息后，删除对应的本地key。 但是Redis的发布订阅不是可靠的，不能保证一定删除成功。</li><li>引入专业的消息队列，比如RocketMQ，保证消息的可靠性，但是增加了系统的复杂度。</li><li>设置适当的过期时间兜底，本地缓存可以设置相对短一些的过期时间。</li></ol><h3 id="_30-怎么处理热key" tabindex="-1"><a class="header-anchor" href="#_30-怎么处理热key" aria-hidden="true">#</a> 30.怎么处理热key？</h3><blockquote><p><strong>什么是热Key？</strong> 所谓的热key，就是访问频率比较的key。</p></blockquote><p>比如，热门新闻事件或商品，这类key通常有大流量的访问，对存储这类信息的 Redis来说，是不小的压力。</p><p>假如Redis集群部署，热key可能会造成整体流量的不均衡，个别节点出现OPS过大的情况，极端情况下热点key甚至会超过 Redis本身能够承受的OPS。</p><blockquote><p><strong>怎么处理热key？</strong></p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-6fa972ec-5531-48f2-a608-4465d79d4518.png" alt="热key处理"> 对热key的处理，最关键的是对热点key的监控，可以从这些端来监控热点key:</p><ol><li><p>客户端 客户端其实是距离key“最近”的地方，因为Redis命令就是从客户端发出的，例如在客户端设置全局字典（key和调用次数），每次调用Redis命令时，使用这个字典进行记录。</p></li><li><p>代理端 像Twemproxy、Codis这些基于代理的Redis分布式架构，所有客户端的请求都是通过代理端完成的，可以在代理端进行收集统计。</p></li><li><p>Redis服务端 使用monitor命令统计热点key是很多开发和运维人员首先想到，monitor命令可以监控到Redis执行的所有命令。</p></li></ol><p>只要监控到了热key，对热key的处理就简单了：</p><ol><li><p>把热key打散到不同的服务器，降低压⼒</p></li><li><p>加⼊⼆级缓存，提前加载热key数据到内存中，如果redis宕机，⾛内存查询</p></li></ol><h3 id="_31-缓存预热怎么做呢" tabindex="-1"><a class="header-anchor" href="#_31-缓存预热怎么做呢" aria-hidden="true">#</a> 31.缓存预热怎么做呢？</h3><p>所谓缓存预热，就是提前把数据库里的数据刷到缓存里，通常有这些方法：</p><p>1、直接写个缓存刷新页面或者接口，上线时手动操作</p><p>2、数据量不大，可以在项目启动的时候自动进行加载</p><p>3、定时任务刷新缓存.</p><h3 id="_32-热点key重建-问题-解决" tabindex="-1"><a class="header-anchor" href="#_32-热点key重建-问题-解决" aria-hidden="true">#</a> 32.热点key重建？问题？解决？</h3><p>开发的时候一般使用“缓存+过期时间”的策略，既可以加速数据读写，又保证数据的定期更新，这种模式基本能够满足绝大部分需求。</p><p>但是有两个问题如果同时出现，可能就会出现比较大的问题：</p><ul><li><p>当前key是一个热点key（例如一个热门的娱乐新闻），并发量非常大。</p></li><li><p>重建缓存不能在短时间完成，可能是一个复杂计算，例如复杂的 SQL、多次IO、多个依赖等。 在缓存失效的瞬间，有大量线程来重建缓存，造成后端负载加大，甚至可能会让应用崩溃。</p></li></ul><blockquote><p><strong>怎么处理呢？</strong></p></blockquote><p>要解决这个问题也不是很复杂，解决问题的要点在于：</p><ul><li>减少重建缓存的次数。</li><li>数据尽可能一致。</li><li>较少的潜在危险。</li></ul><p>所以一般采用如下方式：</p><ol><li>互斥锁（mutex key） 这种方法只允许一个线程重建缓存，其他线程等待重建缓存的线程执行完，重新从缓存获取数据即可。</li><li>永远不过期 “永远不过期”包含两层意思：</li></ol><ul><li>从缓存层面来看，确实没有设置过期时间，所以不会出现热点key过期后产生的问题，也就是“物理”不过期。</li><li>从功能层面来看，为每个value设置一个逻辑过期时间，当发现超过逻辑过期时间后，会使用单独的线程去构建缓存。</li></ul><h3 id="_33-无底洞问题吗-如何解决" tabindex="-1"><a class="header-anchor" href="#_33-无底洞问题吗-如何解决" aria-hidden="true">#</a> 33.无底洞问题吗？如何解决？</h3><blockquote><p><strong>什么是无底洞问题？</strong></p></blockquote><p>2010年，Facebook的Memcache节点已经达到了3000个，承载着TB级别的缓存数据。但开发和运维人员发现了一个问题，为了满足业务要求添加了大量新Memcache节点，但是发现性能不但没有好转反而下降了，当时将这 种现象称为缓存的“<strong>无底洞</strong>”现象。</p><p>那么为什么会产生这种现象呢?</p><p>通常来说添加节点使得Memcache集群 性能应该更强了，但事实并非如此。键值数据库由于通常采用哈希函数将 key映射到各个节点上，造成key的分布与业务无关，但是由于数据量和访问量的持续增长，造成需要添加大量节点做水平扩容，导致键值分布到更多的 节点上，所以无论是Memcache还是Redis的分布式，批量操作通常需要从不同节点上获取，相比于单机批量操作只涉及一次网络操作，分布式批量操作会涉及多次网络时间。</p><blockquote><p><strong>无底洞问题如何优化呢？</strong></p></blockquote><p>先分析一下无底洞问题：</p><ul><li><p>客户端一次批量操作会涉及多次网络操作，也就意味着批量操作会随着节点的增多，耗时会不断增大。</p></li><li><p>网络连接数变多，对节点的性能也有一定影响。</p></li></ul><p>常见的优化思路如下：</p><ul><li><p>命令本身的优化，例如优化操作语句等。</p></li><li><p>减少网络通信次数。</p></li><li><p>降低接入成本，例如客户端使用长连/连接池、NIO等。</p></li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><h2 id="redis运维" tabindex="-1"><a class="header-anchor" href="#redis运维" aria-hidden="true">#</a> Redis运维</h2><h3 id="_34-redis报内存不足怎么处理" tabindex="-1"><a class="header-anchor" href="#_34-redis报内存不足怎么处理" aria-hidden="true">#</a> 34.Redis报内存不足怎么处理？</h3><p>Redis 内存不足有这么几种处理方式：</p><ul><li>修改配置文件 redis.conf 的 maxmemory 参数，增加 Redis 可用内存</li><li>也可以通过命令set maxmemory动态设置内存上限</li><li>修改内存淘汰策略，及时释放内存空间</li><li>使用 Redis 集群模式，进行横向扩容。</li></ul><h3 id="_35-redis的过期数据回收策略有哪些" tabindex="-1"><a class="header-anchor" href="#_35-redis的过期数据回收策略有哪些" aria-hidden="true">#</a> 35.Redis的过期数据回收策略有哪些？</h3><p>Redis主要有2种过期数据回收策略： <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-de726c67-e56f-4f4b-96be-5cb998659541.png" alt="在这里插入图片描述"></p><p><strong>惰性删除</strong></p><p>惰性删除指的是当我们查询key的时候才对key进⾏检测，如果已经达到过期时间，则删除。显然，他有⼀个缺点就是如果这些过期的key没有被访问，那么他就⼀直⽆法被删除，⽽且⼀直占⽤内存。</p><p><strong>定期删除</strong></p><p>定期删除指的是Redis每隔⼀段时间对数据库做⼀次检查，删除⾥⾯的过期key。由于不可能对所有key去做轮询来删除，所以Redis会每次随机取⼀些key去做检查和删除。</p><h3 id="_36-redis有哪些内存溢出控制-内存淘汰策略" tabindex="-1"><a class="header-anchor" href="#_36-redis有哪些内存溢出控制-内存淘汰策略" aria-hidden="true">#</a> 36.Redis有哪些内存溢出控制/内存淘汰策略？</h3><p>Redis所用内存达到maxmemory上限时会触发相应的溢出控制策略，Redis支持六种策略： <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-5be7405c-ee11-4d2b-bea4-9598f10a1b17.png" alt="Redis六种内存溢出控制策略"></p><ol><li>noeviction：默认策略，不会删除任何数据，拒绝所有写入操作并返 回客户端错误信息，此 时Redis只响应读操作。</li><li>volatile-lru：根据LRU算法删除设置了超时属性（expire）的键，直 到腾出足够空间为止。如果没有可删除的键对象，回退到noeviction策略。</li><li>allkeys-lru：根据LRU算法删除键，不管数据有没有设置超时属性， 直到腾出足够空间为止。</li><li>allkeys-random：随机删除所有键，直到腾出足够空间为止。</li><li>volatile-random：随机删除过期键，直到腾出足够空间为止。</li><li>volatile-ttl：根据键值对象的ttl属性，删除最近将要过期数据。如果 没有，回退到noeviction策略。</li></ol><h3 id="_37-redis阻塞-怎么解决" tabindex="-1"><a class="header-anchor" href="#_37-redis阻塞-怎么解决" aria-hidden="true">#</a> 37.Redis阻塞？怎么解决？</h3><p>Redis发生阻塞，可以从以下几个方面排查： <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-e6a35258-7a78-4489-90b7-e47a4190802b.png" alt="Redis阻塞排查"></p><ul><li><p><strong>API或数据结构使用不合理</strong></p><p>通常Redis执行命令速度非常快，但是不合理地使用命令，可能会导致执行速度很慢，导致阻塞，对于高并发的场景，应该尽量避免在大对象上执行算法复杂 度超过O（n）的命令。</p><p>对慢查询的处理分为两步：</p><ol><li>发现慢查询： slowlog get{n}命令可以获取最近 的n条慢查询命令；</li><li>发现慢查询后，可以从两个方向去优化慢查询： 1）修改为低算法复杂度的命令，如hgetall改为hmget等，禁用keys、sort等命 令 2）调整大对象：缩减大对象数据或把大对象拆分为多个小对象，防止一次命令操作过多的数据。</li></ol></li><li><p><strong>CPU饱和的问题</strong></p><p>单线程的Redis处理命令时只能使用一个CPU。而CPU饱和是指Redis单核CPU使用率跑到接近100%。</p><p>针对这种情况，处理步骤一般如下：</p><ol><li>判断当前Redis并发量是否已经达到极限，可以使用统计命令redis-cli-h{ip}-p{port}--stat获取当前 Redis使用情况</li><li>如果Redis的请求几万+，那么大概就是Redis的OPS已经到了极限，应该做集群化水品扩展来分摊OPS压力</li><li>如果只有几百几千，那么就得排查命令和内存的使用</li></ol></li><li><p><strong>持久化相关的阻塞</strong></p><p>对于开启了持久化功能的Redis节点，需要排查是否是持久化导致的阻塞。</p><ol><li>fork阻塞 fork操作发生在RDB和AOF重写时，Redis主线程调用fork操作产生共享 内存的子进程，由子进程完成持久化文件重写工作。如果fork操作本身耗时过长，必然会导致主线程的阻塞。</li><li>AOF刷盘阻塞 当我们开启AOF持久化功能时，文件刷盘的方式一般采用每秒一次，后台线程每秒对AOF文件做fsync操作。当硬盘压力过大时，fsync操作需要等 待，直到写入完成。如果主线程发现距离上一次的fsync成功超过2秒，为了 数据安全性它会阻塞直到后台线程执行fsync操作完成。</li><li>HugePage写操作阻塞 对于开启Transparent HugePages的 操作系统，每次写命令引起的复制内存页单位由4K变为2MB，放大了512 倍，会拖慢写操作的执行时间，导致大量写操作慢查询。</li></ol></li></ul><h3 id="_38-大key问题了解吗" tabindex="-1"><a class="header-anchor" href="#_38-大key问题了解吗" aria-hidden="true">#</a> 38.大key问题了解吗？</h3><p>Redis使用过程中，有时候会出现大key的情况， 比如：</p><ul><li>单个简单的key存储的value很大，size超过10KB</li><li>hash， set，zset，list 中存储过多的元素（以万为单位）</li></ul><blockquote><p><strong>大key会造成什么问题呢？</strong></p></blockquote><ul><li>客户端耗时增加，甚至超时</li><li>对大key进行IO操作时，会严重占用带宽和CPU</li><li>造成Redis集群中数据倾斜</li><li>主动删除、被动删等，可能会导致阻塞</li></ul><blockquote><p><strong>如何找到大key?</strong></p></blockquote><ul><li>bigkeys命令：使用bigkeys命令以遍历的方式分析Redis实例中的所有Key，并返回整体统计信息与每个数据类型中Top1的大Key</li><li>redis-rdb-tools：redis-rdb-tools是由Python写的用来分析Redis的rdb快照文件用的工具，它可以把rdb快照文件生成json文件或者生成报表用来分析Redis的使用详情。</li></ul><blockquote><p><strong>如何处理大key?</strong></p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-e4aaafda-fce1-47f0-8b2b-7261d47b720b.png" alt="大key处理"></p><ul><li><p><strong>删除大key</strong></p><ul><li>当Redis版本大于4.0时，可使用UNLINK命令安全地删除大Key，该命令能够以非阻塞的方式，逐步地清理传入的Key。</li><li>当Redis版本小于4.0时，避免使用阻塞式命令KEYS，而是建议通过SCAN命令执行增量迭代扫描key，然后判断进行删除。</li></ul></li><li><p><strong>压缩和拆分key</strong></p><ul><li>当vaule是string时，比较难拆分，则使用序列化、压缩算法将key的大小控制在合理范围内，但是序列化和反序列化都会带来更多时间上的消耗。</li><li>当value是string，压缩之后仍然是大key，则需要进行拆分，一个大key分为不同的部分，记录每个部分的key，使用multiget等操作实现事务读取。</li><li>当value是list/set等集合类型时，根据预估的数据规模来进行分片，不同的元素计算后分到不同的片。</li></ul></li></ul><h3 id="_39-redis常见性能问题和解决方案" tabindex="-1"><a class="header-anchor" href="#_39-redis常见性能问题和解决方案" aria-hidden="true">#</a> 39.Redis常见性能问题和解决方案？</h3><ol><li>Master 最好不要做任何持久化工作，包括内存快照和 AOF 日志文件，特别是不要启用内存快照做持久化。</li><li>如果数据比较关键，某个 Slave 开启 AOF 备份数据，策略为每秒同步一次。</li><li>为了主从复制的速度和连接的稳定性，Slave 和 Master 最好在同一个局域网内。</li><li>尽量避免在压力较大的主库上增加从库。</li><li>Master 调用 BGREWRITEAOF 重写 AOF 文件，AOF 在重写的时候会占大量的 CPU 和内存资源，导致服务 load 过高，出现短暂服务暂停现象。</li><li>为了 Master 的稳定性，主从复制不要用图状结构，用单向链表结构更稳定，即主从关为：Master&lt;–Slave1&lt;–Slave2&lt;–Slave3…，这样的结构也方便解决单点故障问题，实现 Slave 对 Master 的替换，也即，如果 Master 挂了，可以立马启用 Slave1 做 Master，其他不变。</li></ol><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><h2 id="redis应用" tabindex="-1"><a class="header-anchor" href="#redis应用" aria-hidden="true">#</a> Redis应用</h2><h3 id="_40-使用redis-如何实现异步队列" tabindex="-1"><a class="header-anchor" href="#_40-使用redis-如何实现异步队列" aria-hidden="true">#</a> 40.使用Redis 如何实现异步队列？</h3><p>我们知道redis支持很多种结构的数据，那么如何使用redis作为异步队列使用呢？ 一般有以下几种方式：</p><ul><li><strong>使用list作为队列，lpush生产消息，rpop消费消息</strong></li></ul><p>这种方式，消费者死循环rpop从队列中消费消息。但是这样，即使队列里没有消息，也会进行rpop，会导致Redis CPU的消耗。 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-e4b192a1-3ba7-4f4e-98de-e93f437cff7c.png" alt="list作为队列"> 可以通过让消费者休眠的方式的方式来处理，但是这样又会又消息的延迟问题。</p><p>-<strong>使用list作为队列，lpush生产消息，brpop消费消息</strong></p><p>brpop是rpop的阻塞版本，list为空的时候，它会一直阻塞，直到list中有值或者超时。 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-e9581e51-ffc8-4326-9af4-07816743dc88.png" alt="list作为队列，brpop"></p><p>这种方式只能实现一对一的消息队列。</p><ul><li><strong>使用Redis的pub/sub来进行消息的发布/订阅</strong></li></ul><p>发布/订阅模式可以1：N的消息发布/订阅。发布者将消息发布到指定的频道频道（channel），订阅相应频道的客户端都能收到消息。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-bc6d05be-3701-4e23-b4ca-6330c949f020.png" alt="pub/sub"> 但是这种方式不是可靠的，它不保证订阅者一定能收到消息，也不进行消息的存储。</p><p>所以，一般的异步队列的实现还是交给专业的消息队列。</p><h3 id="_41-redis-如何实现延时队列" tabindex="-1"><a class="header-anchor" href="#_41-redis-如何实现延时队列" aria-hidden="true">#</a> 41.Redis 如何实现延时队列?</h3><ul><li><strong>使用zset，利用排序实现</strong></li></ul><p>可以使用 zset这个结构，用设置好的时间戳作为score进行排序，使用 zadd score1 value1 ....命令就可以一直往内存中生产消息。再利用 zrangebysocre 查询符合条件的所有待处理的任务，通过循环执行队列任务即可。 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-54bbcc36-0b00-4142-a6eb-bf2ef48c2213.png" alt="zset实现延时队列"></p><h3 id="_42-redis-支持事务吗" tabindex="-1"><a class="header-anchor" href="#_42-redis-支持事务吗" aria-hidden="true">#</a> 42.Redis 支持事务吗？</h3><p>Redis提供了简单的事务，但它对事务ACID的支持并不完备。</p><p>multi命令代表事务开始，exec命令代表事务结束，它们之间的命令是原子顺序执行的：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token number">127.0</span><span class="token number">.0</span><span class="token number">.1</span><span class="token operator">:</span><span class="token number">6379</span><span class="token operator">&gt;</span> multi 
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aria-current="page" href="/sidebar/sanfene/redis.html#_27-能说说布隆过滤器吗" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="27.能说说布隆过滤器吗？"><!---->27.能说说布隆过滤器吗？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/redis.html#_28-如何保证缓存和数据库数据的一致性" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="28.如何保证缓存和数据库数据的⼀致性？"><!---->28.如何保证缓存和数据库数据的⼀致性？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/redis.html#_29-如何保证本地缓存和分布式缓存的一致" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="29.如何保证本地缓存和分布式缓存的一致？"><!---->29.如何保证本地缓存和分布式缓存的一致？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/redis.html#_30-怎么处理热key" class="router-link-active 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class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/redis.html#redis运维" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="Redis运维"><!---->Redis运维<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/redis.html#_34-redis报内存不足怎么处理" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="34.Redis报内存不足怎么处理？"><!---->34.Redis报内存不足怎么处理？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/redis.html#_35-redis的过期数据回收策略有哪些" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="35.Redis的过期数据回收策略有哪些？"><!---->35.Redis的过期数据回收策略有哪些？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/redis.html#_36-redis有哪些内存溢出控制-内存淘汰策略" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="36.Redis有哪些内存溢出控制/内存淘汰策略？"><!---->36.Redis有哪些内存溢出控制/内存淘汰策略？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/redis.html#_37-redis阻塞-怎么解决" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="37.Redis阻塞？怎么解决？"><!---->37.Redis阻塞？怎么解决？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/redis.html#_38-大key问题了解吗" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="38.大key问题了解吗？"><!---->38.大key问题了解吗？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/redis.html#_39-redis常见性能问题和解决方案" class="router-link-active 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如何实现延时队列?<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/redis.html#_42-redis-支持事务吗" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="42.Redis 支持事务吗？"><!---->42.Redis 支持事务吗？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/redis.html#_43-redis和lua脚本的使用了解吗" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="43.Redis和Lua脚本的使用了解吗？"><!---->43.Redis和Lua脚本的使用了解吗？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/redis.html#_44-redis的管道了解吗" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="44.Redis的管道了解吗？"><!---->44.Redis的管道了解吗？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/redis.html#_45-redis实现分布式锁了解吗" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="45.Redis实现分布式锁了解吗？"><!---->45.Redis实现分布式锁了解吗？<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/redis.html#底层结构" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="底层结构"><!---->底层结构<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/redis.html#_46-说说redis底层数据结构" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="46.说说Redis底层数据结构？"><!---->46.说说Redis底层数据结构？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/redis.html#_47-redis-的-sds-和-c-中字符串相比有什么优势" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="47.Redis 的 SDS 和 C 中字符串相比有什么优势？"><!---->47.Redis 的 SDS 和 C 中字符串相比有什么优势？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/redis.html#_48-字典是如何实现的-rehash-了解吗" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="48.字典是如何实现的？Rehash 了解吗？"><!---->48.字典是如何实现的？Rehash 了解吗？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/redis.html#_49-跳跃表是如何实现的-原理" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="49.跳跃表是如何实现的？原理？"><!---->49.跳跃表是如何实现的？原理？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/redis.html#_50-压缩列表了解吗" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="50.压缩列表了解吗？"><!---->50.压缩列表了解吗？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/redis.html#_51-快速列表-quicklist-了解吗" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="51.快速列表 quicklist 了解吗？"><!---->51.快速列表 quicklist 了解吗？<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/redis.html#其他问题" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="其他问题"><!---->其他问题<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/redis.html#_52-假如redis里面有1亿个key-其中有10w个key是以某个固定的已知的前缀开头的-如何将它们全部找出来" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="52.假如Redis里面有1亿个key，其中有10w个key是以某个固定的已知的前缀开头的，如何将它们全部找出来？"><!---->52.假如Redis里面有1亿个key，其中有10w个key是以某个固定的已知的前缀开头的，如何将它们全部找出来？<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li></ul><!--]--></li><li><!--[--><a href="/sidebar/sanfene/mybatis.html" class="nav-link sidebar-link sidebar-page" aria-label="MyBatis"><!---->MyBatis<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->面渣逆袭（Redis）必看👍</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年5月9日</span><meta property="datePublished" content="2022-05-09T06:49:16.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 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xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag3" role>Redis</li></ul><meta property="keywords" content="Redis"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 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class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#基础" class="router-link-active router-link-exact-active toc-link level2">基础</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_1-说说什么是redis" class="router-link-active router-link-exact-active toc-link level3">1.说说什么是Redis?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_2-redis可以用来干什么" class="router-link-active router-link-exact-active toc-link level3">2.Redis可以用来干什么？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_3-redis-有哪些数据结构" class="router-link-active router-link-exact-active toc-link level3">3.Redis 有哪些数据结构？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_4-redis为什么快呢" class="router-link-active router-link-exact-active toc-link level3">4.Redis为什么快呢？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_5-能说一下i-o多路复用吗" class="router-link-active router-link-exact-active toc-link level3">5.能说一下I/O多路复用吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_6-redis为什么早期选择单线程" class="router-link-active router-link-exact-active toc-link level3">6. Redis为什么早期选择单线程？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_7-redis6-0使用多线程是怎么回事" class="router-link-active router-link-exact-active toc-link level3">7.Redis6.0使用多线程是怎么回事?</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#持久化" class="router-link-active router-link-exact-active toc-link level2">持久化</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_8-redis持久化方式有哪些-有什么区别" class="router-link-active router-link-exact-active toc-link level3">8.Redis持久化⽅式有哪些？有什么区别？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_9-rdb-和-aof-各自有什么优缺点" class="router-link-active router-link-exact-active toc-link level3">9.RDB 和 AOF 各自有什么优缺点？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_10-rdb和aof如何选择" class="router-link-active router-link-exact-active toc-link level3">10.RDB和AOF如何选择？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_11-redis的数据恢复" class="router-link-active router-link-exact-active toc-link level3">11.Redis的数据恢复？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_12-redis-4-0-的混合持久化了解吗" class="router-link-active router-link-exact-active toc-link level3">12.Redis 4.0 的混合持久化了解吗？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#高可用" class="router-link-active router-link-exact-active toc-link level2">高可用</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_13-主从复制了解吗" class="router-link-active router-link-exact-active toc-link level3">13.主从复制了解吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_14-redis主从有几种常见的拓扑结构" class="router-link-active router-link-exact-active toc-link level3">14.Redis主从有几种常见的拓扑结构？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_15-redis的主从复制原理了解吗" class="router-link-active router-link-exact-active toc-link level3">15.Redis的主从复制原理了解吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_16-说说主从数据同步的方式" class="router-link-active router-link-exact-active toc-link level3">16.说说主从数据同步的方式？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_17-主从复制存在哪些问题呢" class="router-link-active router-link-exact-active toc-link level3">17.主从复制存在哪些问题呢？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_18-redis-sentinel-哨兵-了解吗" class="router-link-active router-link-exact-active toc-link level3">18.Redis Sentinel（哨兵）了解吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_19-redis-sentinel-哨兵-实现原理知道吗" class="router-link-active router-link-exact-active toc-link level3">19.Redis Sentinel（哨兵）实现原理知道吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_20-领导者sentinel节点选举了解吗" class="router-link-active router-link-exact-active toc-link level3">20.领导者Sentinel节点选举了解吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_21-新的主节点是怎样被挑选出来的" class="router-link-active router-link-exact-active toc-link level3">21.新的主节点是怎样被挑选出来的？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_22-redis-集群了解吗" class="router-link-active router-link-exact-active toc-link level3">22.Redis 集群了解吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_23-集群中数据如何分区" class="router-link-active router-link-exact-active toc-link level3">23.集群中数据如何分区？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_24-能说说redis集群的原理吗" class="router-link-active router-link-exact-active toc-link level3">24.能说说Redis集群的原理吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_25-说说集群的伸缩" class="router-link-active router-link-exact-active toc-link level3">25.说说集群的伸缩？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#缓存设计" class="router-link-active router-link-exact-active toc-link level2">缓存设计</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_26-什么是缓存击穿、缓存穿透、缓存雪崩" class="router-link-active router-link-exact-active toc-link level3">26.什么是缓存击穿、缓存穿透、缓存雪崩？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_27-能说说布隆过滤器吗" class="router-link-active router-link-exact-active toc-link level3">27.能说说布隆过滤器吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_28-如何保证缓存和数据库数据的一致性" class="router-link-active router-link-exact-active toc-link level3">28.如何保证缓存和数据库数据的⼀致性？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_29-如何保证本地缓存和分布式缓存的一致" class="router-link-active router-link-exact-active toc-link level3">29.如何保证本地缓存和分布式缓存的一致？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_30-怎么处理热key" class="router-link-active router-link-exact-active toc-link level3">30.怎么处理热key？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_31-缓存预热怎么做呢" class="router-link-active router-link-exact-active toc-link level3">31.缓存预热怎么做呢？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_32-热点key重建-问题-解决" class="router-link-active router-link-exact-active toc-link level3">32.热点key重建？问题？解决？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_33-无底洞问题吗-如何解决" class="router-link-active router-link-exact-active toc-link level3">33.无底洞问题吗？如何解决？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#redis运维" class="router-link-active router-link-exact-active toc-link level2">Redis运维</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_34-redis报内存不足怎么处理" class="router-link-active router-link-exact-active toc-link level3">34.Redis报内存不足怎么处理？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_35-redis的过期数据回收策略有哪些" class="router-link-active router-link-exact-active toc-link level3">35.Redis的过期数据回收策略有哪些？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_36-redis有哪些内存溢出控制-内存淘汰策略" class="router-link-active router-link-exact-active toc-link level3">36.Redis有哪些内存溢出控制/内存淘汰策略？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_37-redis阻塞-怎么解决" class="router-link-active router-link-exact-active toc-link level3">37.Redis阻塞？怎么解决？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_38-大key问题了解吗" class="router-link-active router-link-exact-active toc-link level3">38.大key问题了解吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_39-redis常见性能问题和解决方案" class="router-link-active router-link-exact-active toc-link level3">39.Redis常见性能问题和解决方案？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#redis应用" class="router-link-active router-link-exact-active toc-link level2">Redis应用</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_40-使用redis-如何实现异步队列" class="router-link-active router-link-exact-active toc-link level3">40.使用Redis 如何实现异步队列？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_41-redis-如何实现延时队列" class="router-link-active router-link-exact-active toc-link level3">41.Redis 如何实现延时队列?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_42-redis-支持事务吗" class="router-link-active router-link-exact-active toc-link level3">42.Redis 支持事务吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_43-redis和lua脚本的使用了解吗" class="router-link-active router-link-exact-active toc-link level3">43.Redis和Lua脚本的使用了解吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_44-redis的管道了解吗" class="router-link-active router-link-exact-active toc-link level3">44.Redis的管道了解吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_45-redis实现分布式锁了解吗" class="router-link-active router-link-exact-active toc-link level3">45.Redis实现分布式锁了解吗？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#底层结构" class="router-link-active router-link-exact-active toc-link level2">底层结构</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_46-说说redis底层数据结构" class="router-link-active router-link-exact-active toc-link level3">46.说说Redis底层数据结构？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_47-redis-的-sds-和-c-中字符串相比有什么优势" class="router-link-active router-link-exact-active toc-link level3">47.Redis 的 SDS 和 C 中字符串相比有什么优势？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_48-字典是如何实现的-rehash-了解吗" class="router-link-active router-link-exact-active toc-link level3">48.字典是如何实现的？Rehash 了解吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_49-跳跃表是如何实现的-原理" class="router-link-active router-link-exact-active toc-link level3">49.跳跃表是如何实现的？原理？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_50-压缩列表了解吗" class="router-link-active router-link-exact-active toc-link level3">50.压缩列表了解吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_51-快速列表-quicklist-了解吗" class="router-link-active router-link-exact-active toc-link level3">51.快速列表 quicklist 了解吗？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#其他问题" class="router-link-active router-link-exact-active toc-link level2">其他问题</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/redis.html#_52-假如redis里面有1亿个key-其中有10w个key是以某个固定的已知的前缀开头的-如何将它们全部找出来" class="router-link-active router-link-exact-active toc-link level3">52.假如Redis里面有1亿个key，其中有10w个key是以某个固定的已知的前缀开头的，如何将它们全部找出来？</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="面渣逆袭-redis-必看" tabindex="-1"><a class="header-anchor" href="#面渣逆袭-redis-必看" aria-hidden="true">#</a> 面渣逆袭（Redis）必看👍</h1><blockquote><p>图文详解 53 道Redis面试高频题，这次吊打面试官，我觉得稳了（手动 dog）。整理：沉默王二，戳<a href="https://mp.weixin.qq.com/s/19u34NXALB1nOlBCE6Eg-Q" target="_blank" rel="noopener noreferrer">转载链接<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，作者：三分恶，戳<a href="https://mp.weixin.qq.com/s/iJtNJYgirRugNBnzxkbB4Q" target="_blank" rel="noopener noreferrer">原文链接<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>。</p></blockquote><h2 id="基础" tabindex="-1"><a class="header-anchor" href="#基础" aria-hidden="true">#</a> 基础</h2><h3 id="_1-说说什么是redis" tabindex="-1"><a class="header-anchor" href="#_1-说说什么是redis" aria-hidden="true">#</a> 1.说说什么是Redis?</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-96e079f9-49a3-4c55-b0a4-47d043732b62.png" alt="Redis图标"></p><p>Redis是一种基于键值对（key-value）的NoSQL数据库。</p><p>比一般键值对数据库强大的地方，Redis中的value支持string（字符串）、hash（哈希）、 list（列表）、set（集合）、zset（有序集合）、Bitmaps（位图）、 HyperLogLog、GEO（地理信息定位）等多种数据结构，因此 Redis可以满足很多的应用场景。</p><p>而且因为Redis会将所有数据都存放在内存中，所以它的读写性能非常出色。</p><p>不仅如此，Redis还可以将内存的数据利用快照和日志的形式保存到硬盘上，这样在发生类似断电或者机器故障的时候，内存中的数据不会“丢失”。</p><p>除了上述功能以外，Redis还提供了键过期、发布订阅、事务、流水线、Lua脚本等附加功能。</p><p>总之，Redis是一款强大的性能利器。</p><h3 id="_2-redis可以用来干什么" tabindex="-1"><a class="header-anchor" href="#_2-redis可以用来干什么" aria-hidden="true">#</a> 2.Redis可以用来干什么？</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-b02e44b3-3299-450f-b767-4a862b5ac8ff.png" alt="Redis"></p><ol><li><p>缓存</p><p>这是Redis应用最广泛地方，基本所有的Web应用都会使用Redis作为缓存，来降低数据源压力，提高响应速度。 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-d44c2397-5994-452f-8b7b-eb85d2b87685.png" alt="Redis缓存"></p></li><li><p>计数器 Redis天然支持计数功能，而且计数性能非常好，可以用来记录浏览量、点赞量等等。</p></li><li><p>排行榜 Redis提供了列表和有序集合数据结构，合理地使用这些数据结构可以很方便地构建各种排行榜系统。</p></li><li><p>社交网络 赞/踩、粉丝、共同好友/喜好、推送、下拉刷新。</p></li><li><p>消息队列 Redis提供了发布订阅功能和阻塞队列的功能，可以满足一般消息队列功能。</p></li><li><p>分布式锁 分布式环境下，利用Redis实现分布式锁，也是Redis常见的应用。</p></li></ol><p>Redis的应用一般会结合项目去问，以一个电商项目的用户服务为例：</p><ul><li>Token存储：用户登录成功之后，使用Redis存储Token</li><li>登录失败次数计数：使用Redis计数，登录失败超过一定次数，锁定账号</li><li>地址缓存：对省市区数据的缓存</li><li>分布式锁：分布式环境下登录、注册等操作加分布式锁</li><li>……</li></ul><h3 id="_3-redis-有哪些数据结构" tabindex="-1"><a class="header-anchor" href="#_3-redis-有哪些数据结构" aria-hidden="true">#</a> 3.Redis 有哪些数据结构？</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-10434dc7-c7a3-4c1a-b484-de3fb37669ee.png" alt="Redis基本数据结构"> Redis有五种基本数据结构。</p><p><strong>string</strong></p><p>字符串最基础的数据结构。字符串类型的值实际可以是字符串（简单的字符串、复杂的字符串（例如JSON、XML））、数字 （整数、浮点数），甚至是二进制（图片、音频、视频），但是值最大不能超过512MB。</p><p>字符串主要有以下几个典型使用场景：</p><ul><li>缓存功能</li><li>计数</li><li>共享Session</li><li>限速</li></ul><p><strong>hash</strong></p><p>哈希类型是指键值本身又是一个键值对结构。</p><p>哈希主要有以下典型应用场景：</p><ul><li>缓存用户信息</li><li>缓存对象</li></ul><p><strong>list</strong></p><p>列表（list）类型是用来存储多个有序的字符串。列表是一种比较灵活的数据结构，它可以充当栈和队列的角色</p><p>列表主要有以下几种使用场景：</p><ul><li>消息队列</li><li>文章列表</li></ul><p><strong>set</strong></p><p>集合（set）类型也是用来保存多个的字符串元素，但和列表类型不一 样的是，集合中不允许有重复元素，并且集合中的元素是无序的。</p><p>集合主要有如下使用场景：</p><ul><li>标签（tag）</li><li>共同关注</li></ul><p><strong>sorted set</strong></p><p>有序集合中的元素可以排序。但是它和列表使用索引下标作为排序依据不同的是，它给每个元素设置一个权重（score）作为排序的依据。</p><p>有序集合主要应用场景：</p><ul><li>用户点赞统计</li><li>用户排序</li></ul><h3 id="_4-redis为什么快呢" tabindex="-1"><a class="header-anchor" href="#_4-redis为什么快呢" aria-hidden="true">#</a> 4.Redis为什么快呢？</h3><p>Redis的速度⾮常的快，单机的Redis就可以⽀撑每秒十几万的并发，相对于MySQL来说，性能是MySQL的⼏⼗倍。速度快的原因主要有⼏点：</p><ol><li><strong>完全基于内存操作</strong></li><li>使⽤单线程，避免了线程切换和竞态产生的消耗</li><li>基于⾮阻塞的IO多路复⽤机制</li><li>C语⾔实现，优化过的数据结构，基于⼏种基础的数据结构，redis做了⼤量的优化，性能极⾼ <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-e05bca61-4600-495c-b92a-25ac822e034e.png" alt="Redis使用IO多路复用和自身事件模型"></li></ol><h3 id="_5-能说一下i-o多路复用吗" tabindex="-1"><a class="header-anchor" href="#_5-能说一下i-o多路复用吗" aria-hidden="true">#</a> 5.能说一下I/O多路复用吗？</h3><p>引用知乎上一个高赞的回答来解释什么是I/O多路复用。假设你是一个老师，让30个学生解答一道题目，然后检查学生做的是否正确，你有下面几个选择：</p><ul><li><p>第一种选择：按顺序逐个检查，先检查A，然后是B，之后是C、D。。。这中间如果有一个学生卡住，全班都会被耽误。这种模式就好比，你用循环挨个处理socket，根本不具有并发能力。</p></li><li><p>第二种选择：你创建30个分身，每个分身检查一个学生的答案是否正确。 这种类似于为每一个用户创建一个进程或者- 线程处理连接。</p></li><li><p>第三种选择，你站在讲台上等，谁解答完谁举手。这时C、D举手，表示他们解答问题完毕，你下去依次检查C、D的答案，然后继续回到讲台上等。此时E、A又举手，然后去处理E和A。</p></li></ul><p>第一种就是阻塞IO模型，第三种就是I/O复用模型。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-eb541432-d68a-4dd9-b427-96c4dd607d64.png" alt="多路复用模型"></p><p>Linux系统有三种方式实现IO多路复用：select、poll和epoll。</p><p>例如epoll方式是将用户socket对应的fd注册进epoll，然后epoll帮你监听哪些socket上有消息到达，这样就避免了大量的无用操作。此时的socket应该采用非阻塞模式。</p><p>这样，整个过程只在进行select、poll、epoll这些调用的时候才会阻塞，收发客户消息是不会阻塞的，整个进程或者线程就被充分利用起来，这就是事件驱动，所谓的reactor模式。</p><h3 id="_6-redis为什么早期选择单线程" tabindex="-1"><a class="header-anchor" href="#_6-redis为什么早期选择单线程" aria-hidden="true">#</a> 6. Redis为什么早期选择单线程？</h3><p>官方解释：https://redis.io/topics/faq</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-344b8461-98d4-495b-a697-70275b0abad6.png" alt="官方单线程解释"> 官方FAQ表示，因为Redis是基于内存的操作，CPU成为Redis的瓶颈的情况很少见，Redis的瓶颈最有可能是内存的大小或者网络限制。</p><p>如果想要最大程度利用CPU，可以在一台机器上启动多个Redis实例。</p><p>PS：网上有这样的回答，吐槽官方的解释有些敷衍，其实就是历史原因，开发者嫌多线程麻烦，后来这个CPU的利用问题就被抛给了使用者。</p><p>同时FAQ里还提到了， Redis 4.0 之后开始变成多线程，除了主线程外，它也有后台线程在处理一些较为缓慢的操作，例如清理脏数据、无用连接的释放、大 Key 的删除等等。</p><h3 id="_7-redis6-0使用多线程是怎么回事" tabindex="-1"><a class="header-anchor" href="#_7-redis6-0使用多线程是怎么回事" aria-hidden="true">#</a> 7.Redis6.0使用多线程是怎么回事?</h3><p>Redis不是说用单线程的吗？怎么6.0成了多线程的？</p><p>Redis6.0的多线程是用多线程来处理数据的<strong>读写和协议解析</strong>，但是Redis<strong>执行命令</strong>还是单线程的。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-b7b24e25-d2dc-4457-994f-95bdb3674b8e.png" alt="Redis6.0多线程"> 这样做的⽬的是因为Redis的性能瓶颈在于⽹络IO⽽⾮CPU，使⽤多线程能提升IO读写的效率，从⽽整体提⾼Redis的性能。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><h2 id="持久化" tabindex="-1"><a class="header-anchor" href="#持久化" aria-hidden="true">#</a> 持久化</h2><h3 id="_8-redis持久化方式有哪些-有什么区别" tabindex="-1"><a class="header-anchor" href="#_8-redis持久化方式有哪些-有什么区别" aria-hidden="true">#</a> 8.Redis持久化⽅式有哪些？有什么区别？</h3><p>Redis持久化⽅案分为RDB和AOF两种。 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-3bda4a46-adc3-4f0d-a135-b8ae5d4c0d5d.png" alt="Redis持久化两种方式"></p><p><strong>RDB</strong></p><p>RDB持久化是把当前进程数据生成<strong>快照</strong>保存到硬盘的过程，触发RDB持久化过程分为手动触发和自动触发。</p><p>RDB⽂件是⼀个压缩的⼆进制⽂件，通过它可以还原某个时刻数据库的状态。由于RDB⽂件是保存在硬盘上的，所以即使Redis崩溃或者退出，只要RDB⽂件存在，就可以⽤它来恢复还原数据库的状态。</p><p>手动触发分别对应save和bgsave命令: <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-ffe56e32-34c5-453d-8859-c2febbe6a038.png" alt="save和bgsave"></p><ul><li><p>save命令：阻塞当前Redis服务器，直到RDB过程完成为止，对于内存比较大的实例会造成长时间阻塞，线上环境不建议使用。</p></li><li><p>bgsave命令：Redis进程执行fork操作创建子进程，RDB持久化过程由子进程负责，完成后自动结束。阻塞只发生在fork阶段，一般时间很短。</p></li></ul><p>以下场景会自动触发RDB持久化：</p><ul><li>使用save相关配置，如“save m n”。表示m秒内数据集存在n次修改时，自动触发bgsave。</li><li>如果从节点执行全量复制操作，主节点自动执行bgsave生成RDB文件并发送给从节点</li><li>执行debug reload命令重新加载Redis时，也会自动触发save操作</li><li>默认情况下执行shutdown命令时，如果没有开启AOF持久化功能则自动执行bgsave。</li></ul><p><strong>AOF</strong></p><p>AOF（append only file）持久化：以独立日志的方式记录每次写命令， 重启时再重新执行AOF文件中的命令达到恢复数据的目的。AOF的主要作用是解决了数据持久化的实时性，目前已经是Redis持久化的主流方式。</p><p>AOF的工作流程操作：命令写入 （append）、文件同步（sync）、文件重写（rewrite）、重启加载 （load） <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-a9fb6202-b1a1-484d-a4fa-fef519090b44.png" alt="AOF工作流程">流程如下：</p><p>1）所有的写入命令会追加到aof_buf（缓冲区）中。</p><p>2）AOF缓冲区根据对应的策略向硬盘做同步操作。</p><p>3）随着AOF文件越来越大，需要定期对AOF文件进行重写，达到压缩 的目的。</p><p>4）当Redis服务器重启时，可以加载AOF文件进行数据恢复。</p><h3 id="_9-rdb-和-aof-各自有什么优缺点" tabindex="-1"><a class="header-anchor" href="#_9-rdb-和-aof-各自有什么优缺点" aria-hidden="true">#</a> 9.RDB 和 AOF 各自有什么优缺点？</h3><p><strong>RDB | 优点</strong></p><ol><li>只有一个紧凑的二进制文件 <code>dump.rdb</code>，非常适合备份、全量复制的场景。</li><li><strong>容灾性好</strong>，可以把RDB文件拷贝道远程机器或者文件系统张，用于容灾恢复。</li><li><strong>恢复速度快</strong>，RDB恢复数据的速度远远快于AOF的方式</li></ol><p><strong>RDB | 缺点</strong></p><ol><li><strong>实时性低</strong>，RDB 是间隔一段时间进行持久化，没法做到实时持久化/秒级持久化。如果在这一间隔事件发生故障，数据会丢失。</li><li><strong>存在兼容问题</strong>，Redis演进过程存在多个格式的RDB版本，存在老版本Redis无法兼容新版本RDB的问题。</li></ol><p><strong>AOF | 优点</strong></p><ol><li><strong>实时性好</strong>，aof 持久化可以配置 <code>appendfsync</code> 属性，有 <code>always</code>，每进行一次命令操作就记录到 aof 文件中一次。</li><li>通过 append 模式写文件，即使中途服务器宕机，可以通过 redis-check-aof 工具解决数据一致性问题。</li></ol><p><strong>AOF | 缺点</strong></p><ol><li>AOF 文件比 RDB <strong>文件大</strong>，且 <strong>恢复速度慢</strong>。</li><li><strong>数据集大</strong> 的时候，比 RDB <strong>启动效率低</strong>。</li></ol><h3 id="_10-rdb和aof如何选择" tabindex="-1"><a class="header-anchor" href="#_10-rdb和aof如何选择" aria-hidden="true">#</a> 10.RDB和AOF如何选择？</h3><ul><li>一般来说， 如果想达到足以媲美数据库的 <strong>数据安全性</strong>，应该 <strong>同时使用两种持久化功能</strong>。在这种情况下，当 Redis 重启的时候会优先载入 AOF 文件来恢复原始的数据，因为在通常情况下 AOF 文件保存的数据集要比 RDB 文件保存的数据集要完整。</li><li>如果 <strong>可以接受数分钟以内的数据丢失</strong>，那么可以 <strong>只使用 RDB 持久化</strong>。</li><li>有很多用户都只使用 AOF 持久化，但并不推荐这种方式，因为定时生成 RDB 快照（snapshot）非常便于进行数据备份， 并且 RDB 恢复数据集的速度也要比 AOF 恢复的速度要快，除此之外，使用 RDB 还可以避免 AOF 程序的 bug。</li><li>如果只需要数据在服务器运行的时候存在，也可以不使用任何持久化方式。</li></ul><h3 id="_11-redis的数据恢复" tabindex="-1"><a class="header-anchor" href="#_11-redis的数据恢复" aria-hidden="true">#</a> 11.Redis的数据恢复？</h3><p>当Redis发生了故障，可以从RDB或者AOF中恢复数据。</p><p>恢复的过程也很简单，把RDB或者AOF文件拷贝到Redis的数据目录下，如果使用AOF恢复，配置文件开启AOF，然后启动redis-server即可。 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-f9aab5e9-a875-4316-9ec9-0c5650afe5c1.png" alt="Redis启动加载数据"></p><p><strong>Redis</strong> 启动时加载数据的流程：</p><ol><li>AOF持久化开启且存在AOF文件时，优先加载AOF文件。</li><li>AOF关闭或者AOF文件不存在时，加载RDB文件。</li><li>加载AOF/RDB文件成功后，Redis启动成功。</li><li>AOF/RDB文件存在错误时，Redis启动失败并打印错误信息。</li></ol><h3 id="_12-redis-4-0-的混合持久化了解吗" tabindex="-1"><a class="header-anchor" href="#_12-redis-4-0-的混合持久化了解吗" aria-hidden="true">#</a> 12.Redis 4.0 的混合持久化了解吗？</h3><p>重启 Redis 时，我们很少使用 <code>RDB</code> 来恢复内存状态，因为会丢失大量数据。我们通常使用 AOF 日志重放，但是重放 AOF 日志性能相对 <code>RDB</code> 来说要慢很多，这样在 Redis 实例很大的情况下，启动需要花费很长的时间。</p><p><strong>Redis 4.0</strong> 为了解决这个问题，带来了一个新的持久化选项——<strong>混合持久化</strong>。将 <code>rdb</code> 文件的内容和增量的 AOF 日志文件存在一起。这里的 AOF 日志不再是全量的日志，而是 <strong>自持久化开始到持久化结束</strong> 的这段时间发生的增量 AOF 日志，通常这部分 AOF 日志很小： <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-19c531e5-da95-495a-a4c4-d63a0b8bba95.png" alt="混合持久化"></p><p>于是在 Redis 重启的时候，可以先加载 <code>rdb</code> 的内容，然后再重放增量 AOF 日志就可以完全替代之前的 AOF 全量文件重放，重启效率因此大幅得到提升。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><h2 id="高可用" tabindex="-1"><a class="header-anchor" href="#高可用" aria-hidden="true">#</a> 高可用</h2><p>Redis保证高可用主要有三种方式：主从、哨兵、集群。</p><h3 id="_13-主从复制了解吗" tabindex="-1"><a class="header-anchor" href="#_13-主从复制了解吗" aria-hidden="true">#</a> 13.主从复制了解吗？</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-60497f1e-8afb-44b3-bb7a-d4c29e5ac484.png" alt="Redis主从复制简图"></p><p><strong>主从复制</strong>，是指将一台 Redis 服务器的数据，复制到其他的 Redis 服务器。前者称为 <strong>主节点(master)</strong>，后者称为 <strong>从节点(slave)</strong>。且数据的复制是 <strong>单向</strong> 的，只能由主节点到从节点。Redis 主从复制支持 <strong>主从同步</strong> 和 <strong>从从同步</strong> 两种，后者是 Redis 后续版本新增的功能，以减轻主节点的同步负担。</p><blockquote><p>主从复制主要的作用?</p></blockquote><ul><li><strong>数据冗余：</strong> 主从复制实现了数据的热备份，是持久化之外的一种数据冗余方式。</li><li><strong>故障恢复：</strong> 当主节点出现问题时，可以由从节点提供服务，实现快速的故障恢复 <em>(实际上是一种服务的冗余)</em>。</li><li><strong>负载均衡：</strong> 在主从复制的基础上，配合读写分离，可以由主节点提供写服务，由从节点提供读服务 <em>（即写 Redis 数据时应用连接主节点，读 Redis 数据时应用连接从节点）</em>，分担服务器负载。尤其是在写少读多的场景下，通过多个从节点分担读负载，可以大大提高 Redis 服务器的并发量。</li><li><strong>高可用基石：</strong> 除了上述作用以外，主从复制还是哨兵和集群能够实施的 <strong>基础</strong>，因此说主从复制是 Redis 高可用的基础。</li></ul><h3 id="_14-redis主从有几种常见的拓扑结构" tabindex="-1"><a class="header-anchor" href="#_14-redis主从有几种常见的拓扑结构" aria-hidden="true">#</a> 14.Redis主从有几种常见的拓扑结构？</h3><p>Redis的复制拓扑结构可以支持单层或多层复制关系，根据拓扑复杂性可以分为以下三种：一主一从、一主多从、树状主从结构。</p><p>1.一主一从结构</p><p>一主一从结构是最简单的复制拓扑结构，用于主节点出现宕机时从节点提供故障转移支持。 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-5d91a67c-dbff-4a8d-bf9d-1fe7602d5a27.png" alt="一主一从结构"> 2.一主多从结构</p><p>一主多从结构（又称为星形拓扑结构）使得应用端可以利用多个从节点实现读写分离（见图6-5）。对于读占比较大的场景，可以把读命令发送到从节点来分担主节点压力。 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-71074254-699a-480b-bbb0-c68f364a380b.png" alt="一主多从结构"> 3.树状主从结构</p><p>树状主从结构（又称为树状拓扑结构）使得从节点不但可以复制主节点数据，同时可以作为其他从节点的主节点继续向下层复制。通过引入复制中间层，可以有效降低主节点负载和需要传送给从节点的数据量。 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-dff14203-5e01-4d1b-a775-10ee444ada54.png" alt="树状主从结构"></p><h3 id="_15-redis的主从复制原理了解吗" tabindex="-1"><a class="header-anchor" href="#_15-redis的主从复制原理了解吗" aria-hidden="true">#</a> 15.Redis的主从复制原理了解吗？</h3><p>Redis主从复制的工作流程大概可以分为如下几步： <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-21123b1e-68b4-436b-ac84-3365a49a81bd.png" alt="Redis主从复制工作流程"></p><ol><li>保存主节点（master）信息 这一步只是保存主节点信息，保存主节点的ip和port。</li><li>主从建立连接 从节点（slave）发现新的主节点后，会尝试和主节点建立网络连接。</li><li>发送ping命令 连接建立成功后从节点发送ping请求进行首次通信，主要是检测主从之间网络套接字是否可用、主节点当前是否可接受处理命令。</li><li>权限验证 如果主节点要求密码验证，从节点必须正确的密码才能通过验证。</li><li>同步数据集 主从复制连接正常通信后，主节点会把持有的数据全部发送给从节点。</li><li>命令持续复制 接下来主节点会持续地把写命令发送给从节点，保证主从数据一致性。</li></ol><h3 id="_16-说说主从数据同步的方式" tabindex="-1"><a class="header-anchor" href="#_16-说说主从数据同步的方式" aria-hidden="true">#</a> 16.说说主从数据同步的方式？</h3><p>Redis在2.8及以上版本使用psync命令完成主从数据同步，同步过程分为：全量复制和部分复制。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-7518f715-6dee-4e70-b972-8aed9879e451.png" alt="主从数据同步方式"></p><p><strong>全量复制</strong> 一般用于初次复制场景，Redis早期支持的复制功能只有全量复制，它会把主节点全部数据一次性发送给从节点，当数据量较大时，会对主从节点和网络造成很大的开销。</p><p>全量复制的完整运行流程如下： <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-aa8d2960-b341-49cc-b04c-201241fd15de.png" alt="全量复制"></p><ol><li>发送psync命令进行数据同步，由于是第一次进行复制，从节点没有复制偏移量和主节点的运行ID，所以发送psync-1。</li><li>主节点根据psync-1解析出当前为全量复制，回复+FULLRESYNC响应。</li><li>从节点接收主节点的响应数据保存运行ID和偏移量offset</li><li>主节点执行bgsave保存RDB文件到本地</li><li>主节点发送RDB文件给从节点，从节点把接收的RDB文件保存在本地并直接作为从节点的数据文件</li><li>对于从节点开始接收RDB快照到接收完成期间，主节点仍然响应读写命令，因此主节点会把这期间写命令数据保存在复制客户端缓冲区内，当从节点加载完RDB文件后，主节点再把缓冲区内的数据发送给从节点，保证主从之间数据一致性。</li><li>从节点接收完主节点传送来的全部数据后会清空自身旧数据</li><li>从节点清空数据后开始加载RDB文件</li><li>从节点成功加载完RDB后，如果当前节点开启了AOF持久化功能， 它会立刻做bgrewriteaof操作，为了保证全量复制后AOF持久化文件立刻可用。</li></ol><p><strong>部分复制</strong> 部分复制主要是Redis针对全量复制的过高开销做出的一种优化措施， 使用psync{runId}{offset}命令实现。当从节点（slave）正在复制主节点 （master）时，如果出现网络闪断或者命令丢失等异常情况时，从节点会向 主节点要求补发丢失的命令数据，如果主节点的复制积压缓冲区内存在这部分数据则直接发送给从节点，这样就可以保持主从节点复制的一致性。 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-87600c72-cc6a-4656-81b2-e71864c97f23.png" alt="部分复制"></p><ol><li>当主从节点之间网络出现中断时，如果超过repl-timeout时间，主节点会认为从节点故障并中断复制连接</li><li>主从连接中断期间主节点依然响应命令，但因复制连接中断命令无法发送给从节点，不过主节点内部存在的复制积压缓冲区，依然可以保存最近一段时间的写命令数据，默认最大缓存1MB。</li><li>当主从节点网络恢复后，从节点会再次连上主节点</li><li>当主从连接恢复后，由于从节点之前保存了自身已复制的偏移量和主节点的运行ID。因此会把它们当作psync参数发送给主节点，要求进行部分复制操作。</li><li>主节点接到psync命令后首先核对参数runId是否与自身一致，如果一 致，说明之前复制的是当前主节点；之后根据参数offset在自身复制积压缓冲区查找，如果偏移量之后的数据存在缓冲区中，则对从节点发送+CONTINUE响应，表示可以进行部分复制。</li><li>主节点根据偏移量把复制积压缓冲区里的数据发送给从节点，保证主从复制进入正常状态。</li></ol><h3 id="_17-主从复制存在哪些问题呢" tabindex="-1"><a class="header-anchor" href="#_17-主从复制存在哪些问题呢" aria-hidden="true">#</a> 17.主从复制存在哪些问题呢？</h3><p>主从复制虽好，但也存在一些问题：</p><ul><li>一旦主节点出现故障，需要手动将一个从节点晋升为主节点，同时需要修改应用方的主节点地址，还需要命令其他从节点去复制新的主节点，整个过程都需要人工干预。</li><li>主节点的写能力受到单机的限制。</li><li>主节点的存储能力受到单机的限制。</li></ul><p>第一个问题是Redis的高可用问题，第二、三个问题属于Redis的分布式问题。</p><h3 id="_18-redis-sentinel-哨兵-了解吗" tabindex="-1"><a class="header-anchor" href="#_18-redis-sentinel-哨兵-了解吗" aria-hidden="true">#</a> 18.Redis Sentinel（哨兵）了解吗？</h3><p>主从复制存在一个问题，没法完成自动故障转移。所以我们需要一个方案来完成自动故障转移，它就是Redis Sentinel（哨兵）。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-8b1a055c-f077-49ff-9432-c194d4fc3639.png" alt="Redis Sentinel"></p><p>Redis Sentinel ，它由两部分组成，哨兵节点和数据节点：</p><ul><li><strong>哨兵节点：</strong> 哨兵系统由一个或多个哨兵节点组成，哨兵节点是特殊的 Redis 节点，不存储数据，对数据节点进行监控。</li><li><strong>数据节点：</strong> 主节点和从节点都是数据节点；</li></ul><p>在复制的基础上，哨兵实现了 <strong>自动化的故障恢复</strong> 功能，下面是官方对于哨兵功能的描述：</p><ul><li><strong>监控（Monitoring）：</strong> 哨兵会不断地检查主节点和从节点是否运作正常。</li><li><strong>自动故障转移（Automatic failover）：</strong> 当 <strong>主节点</strong> 不能正常工作时，哨兵会开始 <strong>自动故障转移操作</strong>，它会将失效主节点的其中一个 <strong>从节点升级为新的主节点</strong>，并让其他从节点改为复制新的主节点。</li><li><strong>配置提供者（Configuration provider）：</strong> 客户端在初始化时，通过连接哨兵来获得当前 Redis 服务的主节点地址。</li><li><strong>通知（Notification）：</strong> 哨兵可以将故障转移的结果发送给客户端。</li></ul><p>其中，监控和自动故障转移功能，使得哨兵可以及时发现主节点故障并完成转移。而配置提供者和通知功能，则需要在与客户端的交互中才能体现。</p><h3 id="_19-redis-sentinel-哨兵-实现原理知道吗" tabindex="-1"><a class="header-anchor" href="#_19-redis-sentinel-哨兵-实现原理知道吗" aria-hidden="true">#</a> 19.Redis Sentinel（哨兵）实现原理知道吗？</h3><p>哨兵模式是通过哨兵节点完成对数据节点的监控、下线、故障转移。 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-4074d72a-886a-4892-8f55-80112005aad8.png" alt="Redis Sentinel工作流程"></p><ul><li><strong>定时监控</strong><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-e7708f8d-ef34-4255-b5d0-cb300c649716.png" alt="三个定时任务">Redis Sentinel通过三个定时监控任务完成对各个节点发现和监控： <ol><li>每隔10秒，每个Sentinel节点会向主节点和从节点发送info命令获取最新的拓扑结构</li><li>每隔2秒，每个Sentinel节点会向Redis数据节点的__sentinel__：hello 频道上发送该Sentinel节点对于主节点的判断以及当前Sentinel节点的信息</li><li>每隔1秒，每个Sentinel节点会向主节点、从节点、其余Sentinel节点发送一条ping命令做一次心跳检测，来确认这些节点当前是否可达</li></ol></li><li><strong>主观下线和客观下线</strong> 主观下线就是哨兵节点认为某个节点有问题，客观下线就是超过一定数量的哨兵节点认为主节点有问题。 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-11839a24-9249-48a5-8c9d-888aa80d91dc.png" alt="主观下线和客观下线"></li></ul><ol><li><p>主观下线 每个Sentinel节点会每隔1秒对主节点、从节点、其他Sentinel节点发送ping命令做心跳检测，当这些节点超过 down-after-milliseconds没有进行有效回复，Sentinel节点就会对该节点做失败判定，这个行为叫做主观下线。</p></li><li><p>客观下线 当Sentinel主观下线的节点是主节点时，该Sentinel节点会通过sentinel is- master-down-by-addr命令向其他Sentinel节点询问对主节点的判断，当超过 &lt;quorum&gt;个数，Sentinel节点认为主节点确实有问题，这时该Sentinel节点会做出客观下线的决定</p></li></ol><ul><li><p><strong>领导者Sentinel节点选举</strong> Sentinel节点之间会做一个领导者选举的工作，选出一个Sentinel节点作为领导者进行故障转移的工作。Redis使用了Raft算法实现领导者选举。</p></li><li><p><strong>故障转移</strong></p><p>领导者选举出的Sentinel节点负责故障转移，过程如下： <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-0618a5e2-e94f-40d7-888a-e78019ba8f93.png" alt="故障转移"></p><ol><li>在从节点列表中选出一个节点作为新的主节点，这一步是相对复杂一些的一步</li><li>Sentinel领导者节点会对第一步选出来的从节点执行slaveof no one命令让其成为主节点</li><li>Sentinel领导者节点会向剩余的从节点发送命令，让它们成为新主节点的从节点</li><li>Sentinel节点集合会将原来的主节点更新为从节点，并保持着对其关注，当其恢复后命令它去复制新的主节点</li></ol></li></ul><h3 id="_20-领导者sentinel节点选举了解吗" tabindex="-1"><a class="header-anchor" href="#_20-领导者sentinel节点选举了解吗" aria-hidden="true">#</a> 20.领导者Sentinel节点选举了解吗？</h3><p>Redis使用了Raft算法实 现领导者选举，大致流程如下： <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-6586ae3c-6b33-4c9f-8137-f02fc0e6cfae.png" alt="领导者Sentinel节点选举"></p><ol><li>每个在线的Sentinel节点都有资格成为领导者，当它确认主节点主观 下线时候，会向其他Sentinel节点发送sentinel is-master-down-by-addr命令， 要求将自己设置为领导者。</li><li>收到命令的Sentinel节点，如果没有同意过其他Sentinel节点的sentinel is-master-down-by-addr命令，将同意该请求，否则拒绝。</li><li>如果该Sentinel节点发现自己的票数已经大于等于max（quorum， num（sentinels）/2+1），那么它将成为领导者。</li><li>如果此过程没有选举出领导者，将进入下一次选举。</li></ol><h3 id="_21-新的主节点是怎样被挑选出来的" tabindex="-1"><a class="header-anchor" href="#_21-新的主节点是怎样被挑选出来的" aria-hidden="true">#</a> 21.新的主节点是怎样被挑选出来的？</h3><p>选出新的主节点，大概分为这么几步： <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-03976d35-20b6-4efe-aa9c-7d3759460d34.png" alt="新的主节点"></p><ol><li>过滤：“不健康”（主观下线、断线）、5秒内没有回复过Sentinel节 点ping响应、与主节点失联超过down-after-milliseconds*10秒。</li><li>选择slave-priority（从节点优先级）最高的从节点列表，如果存在则返回，不存在则继续。</li><li>选择复制偏移量最大的从节点（复制的最完整），如果存在则返 回，不存在则继续。</li><li>选择runid最小的从节点。</li></ol><h3 id="_22-redis-集群了解吗" tabindex="-1"><a class="header-anchor" href="#_22-redis-集群了解吗" aria-hidden="true">#</a> 22.Redis 集群了解吗？</h3><p>前面说到了主从存在高可用和分布式的问题，哨兵解决了高可用的问题，而集群就是终极方案，一举解决高可用和分布式问题。 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-5cbc6009-251e-4d5b-8f22-8d543938eccb.png" alt="Redis 集群示意图"></p><ol><li><p><strong>数据分区：</strong> 数据分区 <em>(或称数据分片)</em> 是集群最核心的功能。集群将数据分散到多个节点，一方面 突破了 Redis 单机内存大小的限制，<strong>存储容量大大增加</strong>；<strong>另一方面</strong> 每个主节点都可以对外提供读服务和写服务，<strong>大大提高了集群的响应能力</strong>。</p></li><li><p><strong>高可用：</strong> 集群支持主从复制和主节点的 <strong>自动故障转移</strong> <em>（与哨兵类似）</em>，当任一节点发生故障时，集群仍然可以对外提供服务。</p></li></ol><h3 id="_23-集群中数据如何分区" tabindex="-1"><a class="header-anchor" href="#_23-集群中数据如何分区" aria-hidden="true">#</a> 23.集群中数据如何分区？</h3><p>分布式的存储中，要把数据集按照分区规则映射到多个节点，常见的数据分区规则三种： <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-ceb49e41-dfd7-4d1e-91f9-c299437227d2.png" alt="分布式数据分区"></p><h5 id="方案一-节点取余分区" tabindex="-1"><a class="header-anchor" href="#方案一-节点取余分区" aria-hidden="true">#</a> 方案一：节点取余分区</h5><p>节点取余分区，非常好理解，使用特定的数据，比如Redis的键，或者用户ID之类，对响应的hash值取余：hash（key）%N，来确定数据映射到哪一个节点上。</p><p>不过该方案最大的问题是，当节点数量变化时，如扩容或收缩节点，数据节点映射关 系需要重新计算，会导致数据的重新迁移。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-8b1fcaec-37e6-420a-9ca2-03615232af17.png" alt="节点取余分区"></p><h5 id="方案二-一致性哈希分区" tabindex="-1"><a class="header-anchor" href="#方案二-一致性哈希分区" aria-hidden="true">#</a> 方案二：一致性哈希分区</h5><p>将整个 Hash 值空间组织成一个虚拟的圆环，然后将缓存节点的 IP 地址或者主机名做 Hash 取值后，放置在这个圆环上。当我们需要确定某一个 Key 需 要存取到哪个节点上的时候，先对这个 Key 做同样的 Hash 取值，确定在环上的位置，然后按照顺时针方向在环上“行走”，遇到的第一个缓存节点就是要访问的节点。</p><p>比如说下面 这张图里面，Key 1 和 Key 2 会落入到 Node 1 中，Key 3、Key 4 会落入到 Node 2 中，Key 5 落入到 Node 3 中，Key 6 落入到 Node 4 中。 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-89bd1c1c-251c-4f53-bba3-fe945b2ae9e2.png" alt="一致性哈希分区"></p><p>这种方式相比节点取余最大的好处在于加入和删除节点只影响哈希环中 相邻的节点，对其他节点无影响。</p><p>但它还是存在问题：</p><ul><li>缓存节点在圆环上分布不平均，会造成部分缓存节点的压力较大</li><li>当某个节点故障时，这个节点所要承担的所有访问都会被顺移到另一个节点上，会对后面这个节点造成力。</li></ul><h5 id="方案三-虚拟槽分区" tabindex="-1"><a class="header-anchor" href="#方案三-虚拟槽分区" aria-hidden="true">#</a> 方案三：虚拟槽分区</h5><p>这个方案 一致性哈希分区的基础上，引入了 <strong>虚拟节点</strong> 的概念。Redis 集群使用的便是该方案，其中的虚拟节点称为 <strong>槽（slot）</strong>。槽是介于数据和实际节点之间的虚拟概念，每个实际节点包含一定数量的槽，每个槽包含哈希值在一定范围内的数据。 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-e0ed9d62-3406-40db-8b01-c931f1020612.png" alt="虚拟槽分配"></p><p>在使用了槽的一致性哈希分区中，槽是数据管理和迁移的基本单位。槽解耦了数据和实际节点 之间的关系，增加或删除节点对系统的影响很小。仍以上图为例，系统中有 <code>4</code> 个实际节点，假设为其分配 <code>16</code> 个槽(0-15)；</p><ul><li>槽 0-3 位于 node1；4-7 位于 node2；以此类推....</li></ul><p>如果此时删除 <code>node2</code>，只需要将槽 4-7 重新分配即可，例如槽 4-5 分配给 <code>node1</code>，槽 6 分配给 <code>node3</code>，槽 7 分配给 <code>node4</code>，数据在其他节点的分布仍然较为均衡。</p><h3 id="_24-能说说redis集群的原理吗" tabindex="-1"><a class="header-anchor" href="#_24-能说说redis集群的原理吗" aria-hidden="true">#</a> 24.能说说Redis集群的原理吗？</h3><p>Redis集群通过数据分区来实现数据的分布式存储，通过自动故障转移实现高可用。</p><h5 id="集群创建" tabindex="-1"><a class="header-anchor" href="#集群创建" aria-hidden="true">#</a> 集群创建</h5><p>数据分区是在集群创建的时候完成的。 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-046a512c-baab-4e3a-9409-2af58088cceb.png" alt="集群创建"></p><p><strong>设置节点</strong> Redis集群一般由多个节点组成，节点数量至少为6个才能保证组成完整高可用的集群。每个节点需要开启配置cluster-enabled yes，让Redis运行在集群模式下。 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-e6064ba6-fd6f-4270-92f9-68c0bb98fd4b.png" alt="节点和握手"><strong>节点握手</strong> 节点握手是指一批运行在集群模式下的节点通过Gossip协议彼此通信， 达到感知对方的过程。节点握手是集群彼此通信的第一步，由客户端发起命 令：cluster meet{ip}{port}。完成节点握手之后，一个个的Redis节点就组成了一个多节点的集群。</p><p><strong>分配槽（slot）</strong> Redis集群把所有的数据映射到16384个槽中。每个节点对应若干个槽，只有当节点分配了槽，才能响应和这些槽关联的键命令。通过 cluster addslots命令为节点分配槽。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-15341792-e7a6-428c-a109-22827e02be5f.png" alt="分配槽"></p><h5 id="故障转移" tabindex="-1"><a class="header-anchor" href="#故障转移" aria-hidden="true">#</a> 故障转移</h5><p>Redis集群的故障转移和哨兵的故障转移类似，但是Redis集群中所有的节点都要承担状态维护的任务。</p><p><strong>故障发现</strong> Redis集群内节点通过ping/pong消息实现节点通信，集群中每个节点都会定期向其他节点发送ping消息，接收节点回复pong 消息作为响应。如果在cluster-node-timeout时间内通信一直失败，则发送节 点会认为接收节点存在故障，把接收节点标记为主观下线（pfail）状态。 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-84a2a89e-f9ea-4681-b748-1a4f1dee172b.png" alt="主观下线"> 当某个节点判断另一个节点主观下线后，相应的节点状态会跟随消息在集群内传播。通过Gossip消息传播，集群内节点不断收集到故障节点的下线报告。当 半数以上持有槽的主节点都标记某个节点是主观下线时。触发客观下线流程。 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-b61a6109-7aea-45ab-a53c-267eebb9180a.png" alt="主观下线和客观下线"></p><p><strong>故障恢复</strong></p><p>故障节点变为客观下线后，如果下线节点是持有槽的主节点则需要在它 的从节点中选出一个替换它，从而保证集群的高可用。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-0e5a49b3-cb5a-4aef-a81f-fce50a012a39.png" alt="故障恢复流程"></p><ol><li>资格检查 每个从节点都要检查最后与主节点断线时间，判断是否有资格替换故障 的主节点。</li><li>准备选举时间 当从节点符合故障转移资格后，更新触发故障选举的时间，只有到达该 时间后才能执行后续流程。</li><li>发起选举 当从节点定时任务检测到达故障选举时间（failover_auth_time）到达后，发起选举流程。</li><li>选举投票 持有槽的主节点处理故障选举消息。投票过程其实是一个领导者选举的过程，如集群内有N个持有槽的主节 点代表有N张选票。由于在每个配置纪元内持有槽的主节点只能投票给一个 从节点，因此只能有一个从节点获得N/2+1的选票，保证能够找出唯一的从节点。 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-d0e16ea3-6683-43f4-82a3-80478703ae06.png" alt="选举投票"></li><li>替换主节点 当从节点收集到足够的选票之后，触发替换主节点操作。</li></ol><blockquote><p><strong>部署Redis集群至少需要几个物理节点？</strong></p></blockquote><p>在投票选举的环节，故障主节点也算在投票数内，假设集群内节点规模是3主3从，其中有2 个主节点部署在一台机器上，当这台机器宕机时，由于从节点无法收集到 3/2+1个主节点选票将导致故障转移失败。这个问题也适用于故障发现环节。因此部署集群时所有主节点最少需要部署在3台物理机上才能避免单点问题。</p><h3 id="_25-说说集群的伸缩" tabindex="-1"><a class="header-anchor" href="#_25-说说集群的伸缩" aria-hidden="true">#</a> 25.说说集群的伸缩？</h3><p>Redis集群提供了灵活的节点扩容和收缩方案，可以在不影响集群对外服务的情况下，为集群添加节点进行扩容也可以下线部分节点进行缩容。 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-dd3e9494-eddb-4861-85f7-2646018d93f6.png" alt="集群的伸缩">其实，集群扩容和缩容的关键点，就在于槽和节点的对应关系，扩容和缩容就是将一部分<code>槽</code>和<code>数据</code>迁移给新节点。</p><p>例如下面一个集群，每个节点对应若干个槽，每个槽对应一定的数据，如果希望加入1个节点希望实现集群扩容时，需要通过相关命令把一部分槽和内容迁移给新节点。 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-1d24bb63-2b05-4db9-bd6b-983f16a4830e.png" alt="扩容实例">缩容也是类似，先把槽和数据迁移到其它节点，再把对应的节点下线。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><h2 id="缓存设计" tabindex="-1"><a class="header-anchor" href="#缓存设计" aria-hidden="true">#</a> 缓存设计</h2><h3 id="_26-什么是缓存击穿、缓存穿透、缓存雪崩" tabindex="-1"><a class="header-anchor" href="#_26-什么是缓存击穿、缓存穿透、缓存雪崩" aria-hidden="true">#</a> 26.什么是缓存击穿、缓存穿透、缓存雪崩？</h3><p>PS:这是多年黄历的老八股了，一定要理解清楚。</p><h5 id="缓存击穿" tabindex="-1"><a class="header-anchor" href="#缓存击穿" aria-hidden="true">#</a> 缓存击穿</h5><p>一个并发访问量比较大的key在某个时间过期，导致所有的请求直接打在DB上。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-86579ee6-9dae-4274-a5cc-af6812f48da4.png" alt="缓存击穿"> 解决⽅案：</p><ol><li><p>加锁更新，⽐如请求查询A，发现缓存中没有，对A这个key加锁，同时去数据库查询数据，写⼊缓存，再返回给⽤户，这样后⾯的请求就可以从缓存中拿到数据了。 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-cf63911a-8501-493e-a375-8b47a9f33358.png" alt="加锁更新"></p></li><li><p>将过期时间组合写在value中，通过异步的⽅式不断的刷新过期时间，防⽌此类现象。</p></li></ol><h5 id="缓存穿透" tabindex="-1"><a class="header-anchor" href="#缓存穿透" aria-hidden="true">#</a> 缓存穿透</h5><p>缓存穿透指的查询缓存和数据库中都不存在的数据，这样每次请求直接打到数据库，就好像缓存不存在一样。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-029951e6-8b99-4364-a570-010853deb594.png" alt="缓存穿透"> 缓存穿透将导致不存在的数据每次请求都要到存储层去查询，失去了缓存保护后端存储的意义。</p><p>缓存穿透可能会使后端存储负载加大，如果发现大量存储层空命中，可能就是出现了缓存穿透问题。</p><p>缓存穿透可能有两种原因：</p><ol><li>自身业务代码问题</li><li>恶意攻击，爬虫造成空命中</li></ol><p>它主要有两种解决办法：</p><ul><li><strong>缓存空值/默认值</strong></li></ul><p>一种方式是在数据库不命中之后，把一个空对象或者默认值保存到缓存，之后再访问这个数据，就会从缓存中获取，这样就保护了数据库。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-288af5a2-ae5a-427a-95e9-b4a658b01386.png" alt="缓存空值/默认值"></p><p>缓存空值有两大问题：</p><ol><li><p>空值做了缓存，意味着缓存层中存了更多的键，需要更多的内存空间（如果是攻击，问题更严重），比较有效的方法是针对这类数据设置一个较短的过期时间，让其自动剔除。</p></li><li><p>缓存层和存储层的数据会有一段时间窗口的不一致，可能会对业务有一定影响。 例如过期时间设置为5分钟，如果此时存储层添加了这个数据，那此段时间就会出现缓存层和存储层数据的不一致。 这时候可以利用消息队列或者其它异步方式清理缓存中的空对象。</p></li></ol><ul><li><strong>布隆过滤器</strong> 除了缓存空对象，我们还可以在存储和缓存之前，加一个布隆过滤器，做一层过滤。</li></ul><p>布隆过滤器里会保存数据是否存在，如果判断数据不不能再，就不会访问存储。 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-0e18ea40-a2e5-4fa6-989e-e771f6e4b0fc.png" alt="布隆过滤器"> 两种解决方案的对比： <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-e8a382c9-4379-44ab-b1dc-fb598a228105.png" alt="缓存空对象核布隆过滤器方案对比"></p><h5 id="缓存雪崩" tabindex="-1"><a class="header-anchor" href="#缓存雪崩" aria-hidden="true">#</a> 缓存雪崩</h5><p>某⼀时刻发⽣⼤规模的缓存失效的情况，例如缓存服务宕机、大量key在同一时间过期，这样的后果就是⼤量的请求进来直接打到DB上，可能导致整个系统的崩溃，称为雪崩。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-1464fe22-c463-4850-8989-b899510cb10e.png" alt="缓存雪崩"> 缓存雪崩是三大缓存问题里最严重的一种，我们来看看怎么预防和处理。</p><ul><li><strong>提高缓存可用性</strong></li></ul><ol><li>集群部署：通过集群来提升缓存的可用性，可以利用Redis本身的Redis Cluster或者第三方集群方案如Codis等。</li><li>多级缓存：设置多级缓存，第一级缓存失效的基础上，访问二级缓存，每一级缓存的失效时间都不同。</li></ol><ul><li><strong>过期时间</strong></li></ul><ol><li>均匀过期：为了避免大量的缓存在同一时间过期，可以把不同的 key 过期时间随机生成，避免过期时间太过集中。</li><li>热点数据永不过期。</li></ol><ul><li><strong>熔断降级</strong></li></ul><ol><li>服务熔断：当缓存服务器宕机或超时响应时，为了防止整个系统出现雪崩，暂时停止业务服务访问缓存系统。</li><li>服务降级：当出现大量缓存失效，而且处在高并发高负荷的情况下，在业务系统内部暂时舍弃对一些非核心的接口和数据的请求，而直接返回一个提前准备好的 fallback（退路）错误处理信息。</li></ol><h3 id="_27-能说说布隆过滤器吗" tabindex="-1"><a class="header-anchor" href="#_27-能说说布隆过滤器吗" aria-hidden="true">#</a> 27.能说说布隆过滤器吗？</h3><p>布隆过滤器，它是一个连续的数据结构，每个存储位存储都是一个<code>bit</code>，即<code>0</code>或者<code>1</code>, 来标识数据是否存在。</p><p>存储数据的时时候，使用K个不同的哈希函数将这个变量映射为bit列表的的K个点，把它们置为1。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-d0b8d85c-85dc-4843-b4be-d5d48338a44e.png" alt="布隆过滤器">我们判断缓存key是否存在，同样，K个哈希函数，映射到bit列表上的K个点，判断是不是1：</p><ul><li>如果全不是1，那么key不存在；</li><li>如果都是1，也只是表示key可能存在。</li></ul><p>布隆过滤器也有一些缺点：</p><ol><li>它在判断元素是否在集合中时是有一定错误几率，因为哈希算法有一定的碰撞的概率。</li><li>不支持删除元素。</li></ol><h3 id="_28-如何保证缓存和数据库数据的一致性" tabindex="-1"><a class="header-anchor" href="#_28-如何保证缓存和数据库数据的一致性" aria-hidden="true">#</a> 28.如何保证缓存和数据库数据的⼀致性？</h3><p>根据CAP理论，在保证可用性和分区容错性的前提下，无法保证一致性，所以缓存和数据库的绝对一致是不可能实现的，只能尽可能保存缓存和数据库的最终一致性。</p><h5 id="选择合适的缓存更新策略" tabindex="-1"><a class="header-anchor" href="#选择合适的缓存更新策略" aria-hidden="true">#</a> 选择合适的缓存更新策略</h5><p><strong>1. 删除缓存而不是更新缓存</strong></p><p>当一个线程对缓存的key进行写操作的时候，如果其它线程进来读数据库的时候，读到的就是脏数据，产生了数据不一致问题。</p><p>相比较而言，删除缓存的速度比更新缓存的速度快很多，所用时间相对也少很多，读脏数据的概率也小很多。 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-ebad0a67-3012-4466-a4dc-e834104c48f8.png" alt="删除缓存和更新缓存"></p><ol start="2"><li><strong>先更数据，后删缓存</strong> 先更数据库还是先删缓存？这是一个问题。</li></ol><p>更新数据，耗时可能在删除缓存的百倍以上。在缓存中不存在对应的key，数据库又没有完成更新的时候，如果有线程进来读取数据，并写入到缓存，那么在更新成功之后，这个key就是一个脏数据。</p><p>毫无疑问，先删缓存，再更数据库，缓存中key不存在的时间的时间更长，有更大的概率会产生脏数据。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-5c929a9e-a723-43b3-8f3c-f22c83765f9d.png" alt="先更数据库还是先删缓存">目前最流行的缓存读写策略cache-aside-pattern就是采用先更数据库，再删缓存的方式。</p><h5 id="缓存不一致处理" tabindex="-1"><a class="header-anchor" href="#缓存不一致处理" aria-hidden="true">#</a> 缓存不一致处理</h5><p>如果不是并发特别高，对缓存依赖性很强，其实一定程序的不一致是可以接受的。</p><p>但是如果对一致性要求比较高，那就得想办法保证缓存和数据库中数据一致。</p><p>缓存和数据库数据不一致常见的两种原因：</p><ul><li>缓存key删除失败</li><li>并发导致写入了脏数据</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-51b3453e-e1f1-4c65-9879-2aa59df23eca.png" alt="缓存一致性"></p><p><strong>消息队列保证key被删除</strong> 可以引入消息队列，把要删除的key或者删除失败的key丢尽消息队列，利用消息队列的重试机制，重试删除对应的key。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-e4a61193-515a-409f-a436-2733abc3a86e.png" alt="消息队列保证key被删除">这种方案看起来不错，缺点是对业务代码有一定的侵入性。</p><p><strong>数据库订阅+消息队列保证key被删除</strong> 可以用一个服务（比如阿里的 canal）去监听数据库的binlog，获取需要操作的数据。</p><p>然后用一个公共的服务获取订阅程序传来的信息，进行缓存删除操作。 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-37c07418-9cd8-43d9-90e7-0cb43b329025.png" alt="数据库订阅+消息队列保证key被删除"> 这种方式降低了对业务的侵入，但其实整个系统的复杂度是提升的，适合基建完善的大厂。</p><p><strong>延时双删防止脏数据</strong> 还有一种情况，是在缓存不存在的时候，写入了脏数据，这种情况在先删缓存，再更数据库的缓存更新策略下发生的比较多，解决方案是延时双删。</p><p>简单说，就是在第一次删除缓存之后，过了一段时间之后，再次删除缓存。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-fab24753-9c53-4432-9413-5feba07ae1e3.png" alt="延时双删"></p><p>这种方式的延时时间设置需要仔细考量和测试。</p><p><strong>设置缓存过期时间兜底</strong></p><p>这是一个朴素但是有用的办法，给缓存设置一个合理的过期时间，即使发生了缓存数据不一致的问题，它也不会永远不一致下去，缓存过期的时候，自然又会恢复一致。</p><h3 id="_29-如何保证本地缓存和分布式缓存的一致" tabindex="-1"><a class="header-anchor" href="#_29-如何保证本地缓存和分布式缓存的一致" aria-hidden="true">#</a> 29.如何保证本地缓存和分布式缓存的一致？</h3><p>PS:这道题面试很少问，但实际工作中很常见。</p><p>在日常的开发中，我们常常采用两级缓存：本地缓存+分布式缓存。</p><p>所谓本地缓存，就是对应服务器的内存缓存，比如Caffeine，分布式缓存基本就是采用Redis。</p><p>那么问题来了，本地缓存和分布式缓存怎么保持数据一致？ <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-6d4ab7e6-8337-4576-bbf0-79202a1c3331.png" alt="延时双删"> Redis缓存，数据库发生更新，直接删除缓存的key即可，因为对于应用系统而言，它是一种中心化的缓存。</p><p>但是本地缓存，它是非中心化的，散落在分布式服务的各个节点上，没法通过客户端的请求删除本地缓存的key，所以得想办法通知集群所有节点，删除对应的本地缓存key。 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-20c15f0d-fb3c-4922-94b1-edcd856658be.png" alt="本地缓存/分布式缓存保持一致"></p><p>可以采用消息队列的方式：</p><ol><li>采用Redis本身的Pub/Sub机制，分布式集群的所有节点订阅删除本地缓存频道，删除Redis缓存的节点，同事发布删除本地缓存消息，订阅者们订阅到消息后，删除对应的本地key。 但是Redis的发布订阅不是可靠的，不能保证一定删除成功。</li><li>引入专业的消息队列，比如RocketMQ，保证消息的可靠性，但是增加了系统的复杂度。</li><li>设置适当的过期时间兜底，本地缓存可以设置相对短一些的过期时间。</li></ol><h3 id="_30-怎么处理热key" tabindex="-1"><a class="header-anchor" href="#_30-怎么处理热key" aria-hidden="true">#</a> 30.怎么处理热key？</h3><blockquote><p><strong>什么是热Key？</strong> 所谓的热key，就是访问频率比较的key。</p></blockquote><p>比如，热门新闻事件或商品，这类key通常有大流量的访问，对存储这类信息的 Redis来说，是不小的压力。</p><p>假如Redis集群部署，热key可能会造成整体流量的不均衡，个别节点出现OPS过大的情况，极端情况下热点key甚至会超过 Redis本身能够承受的OPS。</p><blockquote><p><strong>怎么处理热key？</strong></p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-6fa972ec-5531-48f2-a608-4465d79d4518.png" alt="热key处理"> 对热key的处理，最关键的是对热点key的监控，可以从这些端来监控热点key:</p><ol><li><p>客户端 客户端其实是距离key“最近”的地方，因为Redis命令就是从客户端发出的，例如在客户端设置全局字典（key和调用次数），每次调用Redis命令时，使用这个字典进行记录。</p></li><li><p>代理端 像Twemproxy、Codis这些基于代理的Redis分布式架构，所有客户端的请求都是通过代理端完成的，可以在代理端进行收集统计。</p></li><li><p>Redis服务端 使用monitor命令统计热点key是很多开发和运维人员首先想到，monitor命令可以监控到Redis执行的所有命令。</p></li></ol><p>只要监控到了热key，对热key的处理就简单了：</p><ol><li><p>把热key打散到不同的服务器，降低压⼒</p></li><li><p>加⼊⼆级缓存，提前加载热key数据到内存中，如果redis宕机，⾛内存查询</p></li></ol><h3 id="_31-缓存预热怎么做呢" tabindex="-1"><a class="header-anchor" href="#_31-缓存预热怎么做呢" aria-hidden="true">#</a> 31.缓存预热怎么做呢？</h3><p>所谓缓存预热，就是提前把数据库里的数据刷到缓存里，通常有这些方法：</p><p>1、直接写个缓存刷新页面或者接口，上线时手动操作</p><p>2、数据量不大，可以在项目启动的时候自动进行加载</p><p>3、定时任务刷新缓存.</p><h3 id="_32-热点key重建-问题-解决" tabindex="-1"><a class="header-anchor" href="#_32-热点key重建-问题-解决" aria-hidden="true">#</a> 32.热点key重建？问题？解决？</h3><p>开发的时候一般使用“缓存+过期时间”的策略，既可以加速数据读写，又保证数据的定期更新，这种模式基本能够满足绝大部分需求。</p><p>但是有两个问题如果同时出现，可能就会出现比较大的问题：</p><ul><li><p>当前key是一个热点key（例如一个热门的娱乐新闻），并发量非常大。</p></li><li><p>重建缓存不能在短时间完成，可能是一个复杂计算，例如复杂的 SQL、多次IO、多个依赖等。 在缓存失效的瞬间，有大量线程来重建缓存，造成后端负载加大，甚至可能会让应用崩溃。</p></li></ul><blockquote><p><strong>怎么处理呢？</strong></p></blockquote><p>要解决这个问题也不是很复杂，解决问题的要点在于：</p><ul><li>减少重建缓存的次数。</li><li>数据尽可能一致。</li><li>较少的潜在危险。</li></ul><p>所以一般采用如下方式：</p><ol><li>互斥锁（mutex key） 这种方法只允许一个线程重建缓存，其他线程等待重建缓存的线程执行完，重新从缓存获取数据即可。</li><li>永远不过期 “永远不过期”包含两层意思：</li></ol><ul><li>从缓存层面来看，确实没有设置过期时间，所以不会出现热点key过期后产生的问题，也就是“物理”不过期。</li><li>从功能层面来看，为每个value设置一个逻辑过期时间，当发现超过逻辑过期时间后，会使用单独的线程去构建缓存。</li></ul><h3 id="_33-无底洞问题吗-如何解决" tabindex="-1"><a class="header-anchor" href="#_33-无底洞问题吗-如何解决" aria-hidden="true">#</a> 33.无底洞问题吗？如何解决？</h3><blockquote><p><strong>什么是无底洞问题？</strong></p></blockquote><p>2010年，Facebook的Memcache节点已经达到了3000个，承载着TB级别的缓存数据。但开发和运维人员发现了一个问题，为了满足业务要求添加了大量新Memcache节点，但是发现性能不但没有好转反而下降了，当时将这 种现象称为缓存的“<strong>无底洞</strong>”现象。</p><p>那么为什么会产生这种现象呢?</p><p>通常来说添加节点使得Memcache集群 性能应该更强了，但事实并非如此。键值数据库由于通常采用哈希函数将 key映射到各个节点上，造成key的分布与业务无关，但是由于数据量和访问量的持续增长，造成需要添加大量节点做水平扩容，导致键值分布到更多的 节点上，所以无论是Memcache还是Redis的分布式，批量操作通常需要从不同节点上获取，相比于单机批量操作只涉及一次网络操作，分布式批量操作会涉及多次网络时间。</p><blockquote><p><strong>无底洞问题如何优化呢？</strong></p></blockquote><p>先分析一下无底洞问题：</p><ul><li><p>客户端一次批量操作会涉及多次网络操作，也就意味着批量操作会随着节点的增多，耗时会不断增大。</p></li><li><p>网络连接数变多，对节点的性能也有一定影响。</p></li></ul><p>常见的优化思路如下：</p><ul><li><p>命令本身的优化，例如优化操作语句等。</p></li><li><p>减少网络通信次数。</p></li><li><p>降低接入成本，例如客户端使用长连/连接池、NIO等。</p></li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><h2 id="redis运维" tabindex="-1"><a class="header-anchor" href="#redis运维" aria-hidden="true">#</a> Redis运维</h2><h3 id="_34-redis报内存不足怎么处理" tabindex="-1"><a class="header-anchor" href="#_34-redis报内存不足怎么处理" aria-hidden="true">#</a> 34.Redis报内存不足怎么处理？</h3><p>Redis 内存不足有这么几种处理方式：</p><ul><li>修改配置文件 redis.conf 的 maxmemory 参数，增加 Redis 可用内存</li><li>也可以通过命令set maxmemory动态设置内存上限</li><li>修改内存淘汰策略，及时释放内存空间</li><li>使用 Redis 集群模式，进行横向扩容。</li></ul><h3 id="_35-redis的过期数据回收策略有哪些" tabindex="-1"><a class="header-anchor" href="#_35-redis的过期数据回收策略有哪些" aria-hidden="true">#</a> 35.Redis的过期数据回收策略有哪些？</h3><p>Redis主要有2种过期数据回收策略： <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-de726c67-e56f-4f4b-96be-5cb998659541.png" alt="在这里插入图片描述"></p><p><strong>惰性删除</strong></p><p>惰性删除指的是当我们查询key的时候才对key进⾏检测，如果已经达到过期时间，则删除。显然，他有⼀个缺点就是如果这些过期的key没有被访问，那么他就⼀直⽆法被删除，⽽且⼀直占⽤内存。</p><p><strong>定期删除</strong></p><p>定期删除指的是Redis每隔⼀段时间对数据库做⼀次检查，删除⾥⾯的过期key。由于不可能对所有key去做轮询来删除，所以Redis会每次随机取⼀些key去做检查和删除。</p><h3 id="_36-redis有哪些内存溢出控制-内存淘汰策略" tabindex="-1"><a class="header-anchor" href="#_36-redis有哪些内存溢出控制-内存淘汰策略" aria-hidden="true">#</a> 36.Redis有哪些内存溢出控制/内存淘汰策略？</h3><p>Redis所用内存达到maxmemory上限时会触发相应的溢出控制策略，Redis支持六种策略： <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-5be7405c-ee11-4d2b-bea4-9598f10a1b17.png" alt="Redis六种内存溢出控制策略"></p><ol><li>noeviction：默认策略，不会删除任何数据，拒绝所有写入操作并返 回客户端错误信息，此 时Redis只响应读操作。</li><li>volatile-lru：根据LRU算法删除设置了超时属性（expire）的键，直 到腾出足够空间为止。如果没有可删除的键对象，回退到noeviction策略。</li><li>allkeys-lru：根据LRU算法删除键，不管数据有没有设置超时属性， 直到腾出足够空间为止。</li><li>allkeys-random：随机删除所有键，直到腾出足够空间为止。</li><li>volatile-random：随机删除过期键，直到腾出足够空间为止。</li><li>volatile-ttl：根据键值对象的ttl属性，删除最近将要过期数据。如果 没有，回退到noeviction策略。</li></ol><h3 id="_37-redis阻塞-怎么解决" tabindex="-1"><a class="header-anchor" href="#_37-redis阻塞-怎么解决" aria-hidden="true">#</a> 37.Redis阻塞？怎么解决？</h3><p>Redis发生阻塞，可以从以下几个方面排查： <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-e6a35258-7a78-4489-90b7-e47a4190802b.png" alt="Redis阻塞排查"></p><ul><li><p><strong>API或数据结构使用不合理</strong></p><p>通常Redis执行命令速度非常快，但是不合理地使用命令，可能会导致执行速度很慢，导致阻塞，对于高并发的场景，应该尽量避免在大对象上执行算法复杂 度超过O（n）的命令。</p><p>对慢查询的处理分为两步：</p><ol><li>发现慢查询： slowlog get{n}命令可以获取最近 的n条慢查询命令；</li><li>发现慢查询后，可以从两个方向去优化慢查询： 1）修改为低算法复杂度的命令，如hgetall改为hmget等，禁用keys、sort等命 令 2）调整大对象：缩减大对象数据或把大对象拆分为多个小对象，防止一次命令操作过多的数据。</li></ol></li><li><p><strong>CPU饱和的问题</strong></p><p>单线程的Redis处理命令时只能使用一个CPU。而CPU饱和是指Redis单核CPU使用率跑到接近100%。</p><p>针对这种情况，处理步骤一般如下：</p><ol><li>判断当前Redis并发量是否已经达到极限，可以使用统计命令redis-cli-h{ip}-p{port}--stat获取当前 Redis使用情况</li><li>如果Redis的请求几万+，那么大概就是Redis的OPS已经到了极限，应该做集群化水品扩展来分摊OPS压力</li><li>如果只有几百几千，那么就得排查命令和内存的使用</li></ol></li><li><p><strong>持久化相关的阻塞</strong></p><p>对于开启了持久化功能的Redis节点，需要排查是否是持久化导致的阻塞。</p><ol><li>fork阻塞 fork操作发生在RDB和AOF重写时，Redis主线程调用fork操作产生共享 内存的子进程，由子进程完成持久化文件重写工作。如果fork操作本身耗时过长，必然会导致主线程的阻塞。</li><li>AOF刷盘阻塞 当我们开启AOF持久化功能时，文件刷盘的方式一般采用每秒一次，后台线程每秒对AOF文件做fsync操作。当硬盘压力过大时，fsync操作需要等 待，直到写入完成。如果主线程发现距离上一次的fsync成功超过2秒，为了 数据安全性它会阻塞直到后台线程执行fsync操作完成。</li><li>HugePage写操作阻塞 对于开启Transparent HugePages的 操作系统，每次写命令引起的复制内存页单位由4K变为2MB，放大了512 倍，会拖慢写操作的执行时间，导致大量写操作慢查询。</li></ol></li></ul><h3 id="_38-大key问题了解吗" tabindex="-1"><a class="header-anchor" href="#_38-大key问题了解吗" aria-hidden="true">#</a> 38.大key问题了解吗？</h3><p>Redis使用过程中，有时候会出现大key的情况， 比如：</p><ul><li>单个简单的key存储的value很大，size超过10KB</li><li>hash， set，zset，list 中存储过多的元素（以万为单位）</li></ul><blockquote><p><strong>大key会造成什么问题呢？</strong></p></blockquote><ul><li>客户端耗时增加，甚至超时</li><li>对大key进行IO操作时，会严重占用带宽和CPU</li><li>造成Redis集群中数据倾斜</li><li>主动删除、被动删等，可能会导致阻塞</li></ul><blockquote><p><strong>如何找到大key?</strong></p></blockquote><ul><li>bigkeys命令：使用bigkeys命令以遍历的方式分析Redis实例中的所有Key，并返回整体统计信息与每个数据类型中Top1的大Key</li><li>redis-rdb-tools：redis-rdb-tools是由Python写的用来分析Redis的rdb快照文件用的工具，它可以把rdb快照文件生成json文件或者生成报表用来分析Redis的使用详情。</li></ul><blockquote><p><strong>如何处理大key?</strong></p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-e4aaafda-fce1-47f0-8b2b-7261d47b720b.png" alt="大key处理"></p><ul><li><p><strong>删除大key</strong></p><ul><li>当Redis版本大于4.0时，可使用UNLINK命令安全地删除大Key，该命令能够以非阻塞的方式，逐步地清理传入的Key。</li><li>当Redis版本小于4.0时，避免使用阻塞式命令KEYS，而是建议通过SCAN命令执行增量迭代扫描key，然后判断进行删除。</li></ul></li><li><p><strong>压缩和拆分key</strong></p><ul><li>当vaule是string时，比较难拆分，则使用序列化、压缩算法将key的大小控制在合理范围内，但是序列化和反序列化都会带来更多时间上的消耗。</li><li>当value是string，压缩之后仍然是大key，则需要进行拆分，一个大key分为不同的部分，记录每个部分的key，使用multiget等操作实现事务读取。</li><li>当value是list/set等集合类型时，根据预估的数据规模来进行分片，不同的元素计算后分到不同的片。</li></ul></li></ul><h3 id="_39-redis常见性能问题和解决方案" tabindex="-1"><a class="header-anchor" href="#_39-redis常见性能问题和解决方案" aria-hidden="true">#</a> 39.Redis常见性能问题和解决方案？</h3><ol><li>Master 最好不要做任何持久化工作，包括内存快照和 AOF 日志文件，特别是不要启用内存快照做持久化。</li><li>如果数据比较关键，某个 Slave 开启 AOF 备份数据，策略为每秒同步一次。</li><li>为了主从复制的速度和连接的稳定性，Slave 和 Master 最好在同一个局域网内。</li><li>尽量避免在压力较大的主库上增加从库。</li><li>Master 调用 BGREWRITEAOF 重写 AOF 文件，AOF 在重写的时候会占大量的 CPU 和内存资源，导致服务 load 过高，出现短暂服务暂停现象。</li><li>为了 Master 的稳定性，主从复制不要用图状结构，用单向链表结构更稳定，即主从关为：Master&lt;–Slave1&lt;–Slave2&lt;–Slave3…，这样的结构也方便解决单点故障问题，实现 Slave 对 Master 的替换，也即，如果 Master 挂了，可以立马启用 Slave1 做 Master，其他不变。</li></ol><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><h2 id="redis应用" tabindex="-1"><a class="header-anchor" href="#redis应用" aria-hidden="true">#</a> Redis应用</h2><h3 id="_40-使用redis-如何实现异步队列" tabindex="-1"><a class="header-anchor" href="#_40-使用redis-如何实现异步队列" aria-hidden="true">#</a> 40.使用Redis 如何实现异步队列？</h3><p>我们知道redis支持很多种结构的数据，那么如何使用redis作为异步队列使用呢？ 一般有以下几种方式：</p><ul><li><strong>使用list作为队列，lpush生产消息，rpop消费消息</strong></li></ul><p>这种方式，消费者死循环rpop从队列中消费消息。但是这样，即使队列里没有消息，也会进行rpop，会导致Redis CPU的消耗。 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-e4b192a1-3ba7-4f4e-98de-e93f437cff7c.png" alt="list作为队列"> 可以通过让消费者休眠的方式的方式来处理，但是这样又会又消息的延迟问题。</p><p>-<strong>使用list作为队列，lpush生产消息，brpop消费消息</strong></p><p>brpop是rpop的阻塞版本，list为空的时候，它会一直阻塞，直到list中有值或者超时。 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-e9581e51-ffc8-4326-9af4-07816743dc88.png" alt="list作为队列，brpop"></p><p>这种方式只能实现一对一的消息队列。</p><ul><li><strong>使用Redis的pub/sub来进行消息的发布/订阅</strong></li></ul><p>发布/订阅模式可以1：N的消息发布/订阅。发布者将消息发布到指定的频道频道（channel），订阅相应频道的客户端都能收到消息。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-bc6d05be-3701-4e23-b4ca-6330c949f020.png" alt="pub/sub"> 但是这种方式不是可靠的，它不保证订阅者一定能收到消息，也不进行消息的存储。</p><p>所以，一般的异步队列的实现还是交给专业的消息队列。</p><h3 id="_41-redis-如何实现延时队列" tabindex="-1"><a class="header-anchor" href="#_41-redis-如何实现延时队列" aria-hidden="true">#</a> 41.Redis 如何实现延时队列?</h3><ul><li><strong>使用zset，利用排序实现</strong></li></ul><p>可以使用 zset这个结构，用设置好的时间戳作为score进行排序，使用 zadd score1 value1 ....命令就可以一直往内存中生产消息。再利用 zrangebysocre 查询符合条件的所有待处理的任务，通过循环执行队列任务即可。 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-54bbcc36-0b00-4142-a6eb-bf2ef48c2213.png" alt="zset实现延时队列"></p><h3 id="_42-redis-支持事务吗" tabindex="-1"><a class="header-anchor" href="#_42-redis-支持事务吗" aria-hidden="true">#</a> 42.Redis 支持事务吗？</h3><p>Redis提供了简单的事务，但它对事务ACID的支持并不完备。</p><p>multi命令代表事务开始，exec命令代表事务结束，它们之间的命令是原子顺序执行的：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token number">127.0</span><span class="token number">.0</span><span class="token number">.1</span><span class="token operator">:</span><span class="token number">6379</span><span class="token operator">&gt;</span> multi 
 OK
 <span class="token number">127.0</span><span class="token number">.0</span><span class="token number">.1</span><span class="token operator">:</span><span class="token number">6379</span><span class="token operator">&gt;</span> sadd user<span class="token operator">:</span>a<span class="token operator">:</span>follow user<span class="token operator">:</span>b 
 QUEUED 
@@ -87,6 +87,6 @@ OK
 <span class="token punctuation">(</span>integer<span class="token punctuation">)</span> <span class="token number">1</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>但是以上逻辑还有问题。如果在 setnx 和 expire 之间服务器进程突然挂掉了，可能是因为机器掉电或者是被人为杀掉的，就会导致 expire 得不到执行，也会造成死锁。</p><p>这种问题的根源就在于 setnx 和 expire 是两条指令而不是原子指令。如果这两条指令可以一起执行就不会出现问题。</p><ul><li><strong>V3:set指令</strong></li></ul><p>这个问题在Redis 2.8 版本中得到了解决，这个版本加入了 set 指令的扩展参数，使得 setnx 和expire 指令可以一起执行。 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-710cdd19-98ea-4e96-b579-ff1ebb0d5de9.png" alt="set原子指令"></p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code>set lock<span class="token operator">:</span>fighter3 <span class="token boolean">true</span> ex <span class="token number">5</span> nx OK <span class="token punctuation">.</span><span class="token punctuation">.</span><span class="token punctuation">.</span> <span class="token keyword">do</span> something critical <span class="token punctuation">.</span><span class="token punctuation">.</span><span class="token punctuation">.</span> <span class="token operator">&gt;</span> del lock<span class="token operator">:</span>codehole
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>上面这个指令就是 setnx 和 expire 组合在一起的原子指令，这个就算是比较完善的分布式锁了。</p><p>当然实际的开发，没人会去自己写分布式锁的命令，因为有专业的轮子——<strong>Redisson</strong>。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><h2 id="底层结构" tabindex="-1"><a class="header-anchor" href="#底层结构" aria-hidden="true">#</a> 底层结构</h2><p>这一部分就比较深了，如果不是简历上写了精通Redis，应该不会怎么问。</p><h3 id="_46-说说redis底层数据结构" tabindex="-1"><a class="header-anchor" href="#_46-说说redis底层数据结构" aria-hidden="true">#</a> 46.说说Redis底层数据结构？</h3><p>Redis有<strong>动态字符串(sds)</strong>、<strong>链表(list)</strong>、<strong>字典(ht)</strong>、<strong>跳跃表(skiplist)</strong>、<strong>整数集合(intset)</strong>、<strong>压缩列表(ziplist)</strong> 等底层数据结构。</p><p>Redis并没有使用这些数据结构来直接实现键值对数据库，而是基于这些数据结构创建了一个对象系统，来表示所有的key-value。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-a1b2d2f9-6895-4749-9bda-9314f08bca68.png" alt="redisObject对应的映射"> 我们常用的数据类型和编码对应的映射关系：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-7cf91aa9-8db5-4abe-803e-a9e8f3bcb9e4.png" alt="类型-编码-结构"> 简单看一下底层数据结构，如果对数据结构掌握不错的话，理解这些结构应该不是特别难：</p><ol><li><p><strong>字符串</strong>：redis没有直接使⽤C语⾔传统的字符串表示，⽽是⾃⼰实现的叫做简单动态字符串SDS的抽象类型。</p><p>C语⾔的字符串不记录⾃身的⻓度信息，⽽SDS则保存了⻓度信息，这样将获取字符串⻓度的时间由O(N)降低到了O(1)，同时可以避免缓冲区溢出和减少修改字符串⻓度时所需的内存重分配次数。</p></li></ol><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-7c038f2c-b5ee-4229-9449-713fab3b1855.png" alt="SDS"></p><ol start="2"><li><strong>链表linkedlist</strong>：redis链表是⼀个双向⽆环链表结构，很多发布订阅、慢查询、监视器功能都是使⽤到了链表来实现，每个链表的节点由⼀个listNode结构来表示，每个节点都有指向前置节点和后置节点的指针，同时表头节点的前置和后置节点都指向NULL。</li></ol><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-1adef9c0-8feb-4836-8997-84bda96e2498.png" alt="链表linkedlist"></p><ol start="3"><li><p><strong>字典dict</strong>：⽤于保存键值对的抽象数据结构。Redis使⽤hash表作为底层实现，一个哈希表里可以有多个哈希表节点，而每个哈希表节点就保存了字典里中的一个键值对。 每个字典带有两个hash表，供平时使⽤和rehash时使⽤，hash表使⽤链地址法来解决键冲突，被分配到同⼀个索引位置的多个键值对会形成⼀个单向链表，在对hash表进⾏扩容或者缩容的时候，为了服务的可⽤性，rehash的过程不是⼀次性完成的，⽽是渐进式的。 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-9934b4a2-c253-4d42-acf4-c6c940840779.png" alt="字典"></p></li><li><p><strong>跳跃表skiplist</strong>：跳跃表是有序集合的底层实现之⼀，Redis中在实现有序集合键和集群节点的内部结构中都是⽤到了跳跃表。Redis跳跃表由zskiplist和zskiplistNode组成，zskiplist⽤于保存跳跃表信息（表头、表尾节点、⻓度等），zskiplistNode⽤于表示表跳跃节点，每个跳跃表节点的层⾼都是1-32的随机数，在同⼀个跳跃表中，多个节点可以包含相同的分值，但是每个节点的成员对象必须是唯⼀的，节点按照分值⼤⼩排序，如果分值相同，则按照成员对象的⼤⼩排序。 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-886ee2a8-fb02-4908-bbba-d4ad2a211094.png" alt="跳跃表"></p></li><li><p><strong>整数集合intset</strong>：⽤于保存整数值的集合抽象数据结构，不会出现重复元素，底层实现为数组。 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-833dbfb2-7c79-4e7b-a143-8a4a2936cdd8.png" alt="整数集合intset"></p></li><li><p><strong>压缩列表ziplist</strong>：压缩列表是为节约内存⽽开发的顺序性数据结构，它可以包含任意多个节点，每个节点可以保存⼀个字节数组或者整数值。</p></li></ol><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-99bcbe82-1d91-41bf-8900-a240856071f5.png" alt="压缩列表组成"></p><h3 id="_47-redis-的-sds-和-c-中字符串相比有什么优势" tabindex="-1"><a class="header-anchor" href="#_47-redis-的-sds-和-c-中字符串相比有什么优势" aria-hidden="true">#</a> 47.Redis 的 SDS 和 C 中字符串相比有什么优势？</h3><p>C 语言使用了一个长度为 <code>N+1</code> 的字符数组来表示长度为 <code>N</code> 的字符串，并且字符数组最后一个元素总是 <code>\0</code>，这种简单的字符串表示方式 不符合 Redis 对字符串在安全性、效率以及功能方面的要求。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-2541fd26-4e84-467d-8d8c-c731154a85d7.png" alt="C语言的字符串"></p><blockquote><p><strong>C语言的字符串可能有什么问题？</strong></p></blockquote><p>这样简单的数据结构可能会造成以下一些问题：</p><ul><li><strong>获取字符串长度复杂度高</strong> ：因为 C 不保存数组的长度，每次都需要遍历一遍整个数组，时间复杂度为O(n)；</li><li>不能杜绝 <strong>缓冲区溢出/内存泄漏</strong> 的问题 : C字符串不记录自身长度带来的另外一个问题是容易造成缓存区溢出（buffer overflow），例如在字符串拼接的时候，新的</li><li>C 字符串 <strong>只能保存文本数据</strong> → 因为 C 语言中的字符串必须符合某种编码（比如 ASCII），例如中间出现的 <code>&#39;\0&#39;</code> 可能会被判定为提前结束的字符串而识别不了；</li></ul><blockquote><p><strong>Redis如何解决？优势？</strong></p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-fc26a4e7-1c8d-4e82-b7f8-1f6b43d16d38.png" alt="Redis sds"></p><p>简单来说一下 Redis 如何解决的：</p><ol><li><strong>多增加 len 表示当前字符串的长度</strong>：这样就可以直接获取长度了，复杂度 O(1)；</li><li><strong>自动扩展空间</strong>：当 SDS 需要对字符串进行修改时，首先借助于 <code>len</code> 和 <code>alloc</code> 检查空间是否满足修改所需的要求，如果空间不够的话，SDS 会自动扩展空间，避免了像 C 字符串操作中的溢出情况；</li><li><strong>有效降低内存分配次数</strong>：C 字符串在涉及增加或者清除操作时会改变底层数组的大小造成重新分配，SDS 使用了 <strong>空间预分配</strong> 和 <strong>惰性空间释放</strong> 机制，简单理解就是每次在扩展时是成倍的多分配的，在缩容是也是先留着并不正式归还给 OS；</li><li><strong>二进制安全</strong>：C 语言字符串只能保存 <code>ascii</code> 码，对于图片、音频等信息无法保存，SDS 是二进制安全的，写入什么读取就是什么，不做任何过滤和限制；</li></ol><h3 id="_48-字典是如何实现的-rehash-了解吗" tabindex="-1"><a class="header-anchor" href="#_48-字典是如何实现的-rehash-了解吗" aria-hidden="true">#</a> 48.字典是如何实现的？Rehash 了解吗？</h3><p>字典是 Redis 服务器中出现最为频繁的复合型数据结构。除了 <strong>hash</strong> 结构的数据会用到字典外，整个 Redis 数据库的所有 <code>key</code> 和 <code>value</code> 也组成了一个 <strong>全局字典</strong>，还有带过期时间的 <code>key</code> 也是一个字典。<em>(存储在 RedisDb 数据结构中)</em></p><blockquote><p><strong>字典结构是什么样的呢？</strong></p></blockquote><p><strong>Redis</strong> 中的字典相当于 Java 中的 <strong>HashMap</strong>，内部实现也差不多类似，采用哈希与运算计算下标位置；通过 <strong>&quot;数组 + 链表&quot; <strong>的</strong>链地址法</strong> 来解决哈希冲突，同时这样的结构也吸收了两种不同数据结构的优点。 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-e08347a6-efd5-47c0-9adb-23baff82dbbd.png" alt="Redis字典结构"></p><blockquote><p><strong>字典是怎么扩容的？</strong></p></blockquote><p>字典结构内部包含 <strong>两个 hashtable</strong>，通常情况下只有一个哈希表 ht[0] 有值，在扩容的时候，把ht[0]里的值rehash到ht[1]，然后进行 <strong>渐进式rehash</strong> ——所谓渐进式rehash，指的是这个rehash的动作并不是一次性、集中式地完成的，而是分多次、渐进式地完成的。</p><p>待搬迁结束后，h[1]就取代h[0]存储字典的元素。</p><h3 id="_49-跳跃表是如何实现的-原理" tabindex="-1"><a class="header-anchor" href="#_49-跳跃表是如何实现的-原理" aria-hidden="true">#</a> 49.跳跃表是如何实现的？原理？</h3><p>PS:跳跃表是比较常问的一种结构。</p><p>跳跃表（skiplist）是一种有序数据结构，它通过在每个节点中维持多个指向其它节点的指针，从而达到快速访问节点的目的。 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-08391728-5ba8-42a0-a287-9284451e0ee7.png" alt="跳跃表"></p><blockquote><p><strong>为什么使用跳跃表?</strong></p></blockquote><p>首先，因为 zset 要支持随机的插入和删除，所以它 <strong>不宜使用数组来实现</strong>，关于排序问题，我们也很容易就想到 <strong>红黑树/ 平衡树</strong> 这样的树形结构，为什么 Redis 不使用这样一些结构呢？</p><ol><li><strong>性能考虑：</strong> 在高并发的情况下，树形结构需要执行一些类似于 rebalance 这样的可能涉及整棵树的操作，相对来说跳跃表的变化只涉及局部；</li><li><strong>实现考虑：</strong> 在复杂度与红黑树相同的情况下，跳跃表实现起来更简单，看起来也更加直观；</li></ol><p>基于以上的一些考虑，Redis 基于 <strong>William Pugh</strong> 的论文做出一些改进后采用了 <strong>跳跃表</strong> 这样的结构。</p><p>本质是解决查找问题。</p><blockquote><p><strong>跳跃表是怎么实现的？</strong></p></blockquote><p>跳跃表的节点里有这些元素：</p><ul><li><p><strong>层</strong> 跳跃表节点的level数组可以包含多个元素，每个元素都包含一个指向其它节点的指针，程序可以通过这些层来加快访问其它节点的速度，一般来说，层的数量月多，访问其它节点的速度就越快。</p><p>每次创建一个新的跳跃表节点的时候，程序都根据幂次定律，随机生成一个介于1和32之间的值作为level数组的大小，这个大小就是层的“高度”</p></li><li><p><strong>前进指针</strong> 每个层都有一个指向表尾的前进指针（level[i].forward属性），用于从表头向表尾方向访问节点。</p><p>我们看一下跳跃表从表头到表尾，遍历所有节点的路径： <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-b153f782-e2e5-4f98-b251-04f06e16c073.png" alt="通过前进指针遍历"></p></li><li><p><strong>跨度</strong> 层的跨度用于记录两个节点之间的距离。跨度是用来计算排位（rank）的：在查找某个节点的过程中，将沿途访问过的所有层的跨度累计起来，得到的结果就是目标节点在跳跃表中的排位。</p><p>例如查找，分值为3.0、成员对象为o3的节点时，沿途经历的层：查找的过程只经过了一个层，并且层的跨度为3，所以目标节点在跳跃表中的排位为3。 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-d2395b7e-2f31-4ca8-b06d-2cb47afaeb74.png" alt="计算节点的排位"></p></li><li><p><strong>分值和成员</strong> 节点的分值（score属性）是一个double类型的浮点数，跳跃表中所有的节点都按分值从小到大来排序。</p><p>节点的成员对象（obj属性）是一个指针，它指向一个字符串对象，而字符串对象则保存这一个SDS值。</p></li></ul><h3 id="_50-压缩列表了解吗" tabindex="-1"><a class="header-anchor" href="#_50-压缩列表了解吗" aria-hidden="true">#</a> 50.压缩列表了解吗？</h3><p>压缩列表是 Redis <strong>为了节约内存</strong> 而使用的一种数据结构，是由一系列特殊编码的连续内存快组成的顺序型数据结构。</p><p>一个压缩列表可以包含任意多个节点（entry），每个节点可以保存一个字节数组或者一个整数值。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-6be492f7-9f92-4607-a4c4-81a612a3d7bd.png" alt="压缩列表组成部分">压缩列表由这么几部分组成：</p><ul><li><strong>zlbyttes</strong>:记录整个压缩列表占用的内存字节数</li><li><strong>zltail</strong>:记录压缩列表表尾节点距离压缩列表的起始地址有多少字节</li><li><strong>zllen</strong>:记录压缩列表包含的节点数量</li><li><strong>entryX</strong>:列表节点</li><li><strong>zlend</strong>:用于标记压缩列表的末端</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-b5d224c2-53ee-40a3-9efc-2feb7dd3d7a8.png" alt="压缩列表示例"></p><h3 id="_51-快速列表-quicklist-了解吗" tabindex="-1"><a class="header-anchor" href="#_51-快速列表-quicklist-了解吗" aria-hidden="true">#</a> 51.快速列表 quicklist 了解吗？</h3><p>Redis 早期版本存储 list 列表数据结构使用的是压缩列表 ziplist 和普通的双向链表 linkedlist，也就是说当元素少时使用 ziplist，当元素多时用 linkedlist。</p><p>但考虑到链表的附加空间相对较高，<code>prev</code> 和 <code>next</code> 指针就要占去 <code>16</code> 个字节（64 位操作系统占用 <code>8</code> 个字节），另外每个节点的内存都是单独分配，会家具内存的碎片化，影响内存管理效率。</p><p>后来 Redis 新版本（3.2）对列表数据结构进行了改造，使用 <code>quicklist</code> 代替了 <code>ziplist</code> 和 <code>linkedlist</code>，quicklist是综合考虑了时间效率与空间效率引入的新型数据结构。</p><p>quicklist由list和ziplist结合而成，它是一个由ziplist充当节点的双向链表。 <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/redis-3b9785b0-6573-4c2d-8b7d-d5d1be799e26.png" alt="quicklist"></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><h2 id="其他问题" tabindex="-1"><a class="header-anchor" href="#其他问题" aria-hidden="true">#</a> 其他问题</h2><h3 id="_52-假如redis里面有1亿个key-其中有10w个key是以某个固定的已知的前缀开头的-如何将它们全部找出来" tabindex="-1"><a class="header-anchor" href="#_52-假如redis里面有1亿个key-其中有10w个key是以某个固定的已知的前缀开头的-如何将它们全部找出来" aria-hidden="true">#</a> 52.假如Redis里面有1亿个key，其中有10w个key是以某个固定的已知的前缀开头的，如何将它们全部找出来？</h3><p>使用 <code>keys</code> 指令可以扫出指定模式的 key 列表。但是要注意 keys 指令会导致线程阻塞一段时间，线上服务会停顿，直到指令执行完毕，服务才能恢复。这个时候可以使用 <code>scan</code> 指令，<code>scan</code> 指令可以无阻塞的提取出指定模式的 <code>key</code> 列表，但是会有一定的重复概率，在客户端做一次去重就可以了，但是整体所花费的时间会比直接用 <code>keys</code> 指令长。</p><hr><blockquote><p>图文详解 53 道Redis面试高频题，这次吊打面试官，我觉得稳了（手动 dog）。整理：沉默王二，戳<a href="https://mp.weixin.qq.com/s/19u34NXALB1nOlBCE6Eg-Q" target="_blank" rel="noopener noreferrer">转载链接<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" 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href="/sidebar/sanfene/spring.html#_15-说说循环依赖" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="15.说说循环依赖?"><!---->15.说说循环依赖?<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/spring.html#_16-那-spring-怎么解决循环依赖的呢" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="16.那 Spring 怎么解决循环依赖的呢？"><!---->16.那 Spring 怎么解决循环依赖的呢？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/spring.html#_17-为什么要三级缓存-二级不行吗" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="17.为什么要三级缓存？⼆级不⾏吗？"><!---->17.为什么要三级缓存？⼆级不⾏吗？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/sidebar/sanfene/spring.html#_18-autowired-的实现原理" class="router-link-active router-link-exact-active 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458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag1" role>Spring</li></ul><meta property="keywords" content="Spring"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 54 分钟</span><meta property="timeRequired" content="PT54M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#基础" class="router-link-active router-link-exact-active toc-link level2">基础</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#_1-spring-是什么-特性-有哪些模块" class="router-link-active router-link-exact-active toc-link level3">1.Spring 是什么？特性？有哪些模块？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#_2-spring-有哪些模块呢" class="router-link-active router-link-exact-active toc-link level3">2.Spring 有哪些模块呢？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#_3-spring-有哪些常用注解呢" class="router-link-active router-link-exact-active toc-link level3">3.Spring 有哪些常用注解呢？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#_4-spring-中应用了哪些设计模式呢" class="router-link-active router-link-exact-active toc-link level3">4.Spring 中应用了哪些设计模式呢？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#ioc" class="router-link-active router-link-exact-active toc-link level2">IOC</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#_5-说一说什么是-ioc-什么是-di" class="router-link-active router-link-exact-active toc-link level3">5.说一说什么是 IOC？什么是 DI?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#_6-能简单说一下-spring-ioc-的实现机制吗" class="router-link-active router-link-exact-active toc-link level3">6.能简单说一下 Spring IOC 的实现机制吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#_7-说说-beanfactory-和-applicantcontext" class="router-link-active router-link-exact-active toc-link level3">7.说说 BeanFactory 和 ApplicantContext?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#_8-你知道-spring-容器启动阶段会干什么吗" class="router-link-active router-link-exact-active toc-link level3">8.你知道 Spring 容器启动阶段会干什么吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#_9-能说一下-spring-bean-生命周期吗" class="router-link-active router-link-exact-active toc-link level3">9.能说一下 Spring Bean 生命周期吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#_10-bean-定义和依赖定义有哪些方式" class="router-link-active router-link-exact-active toc-link level3">10.Bean 定义和依赖定义有哪些方式？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#_11-有哪些依赖注入的方法" class="router-link-active router-link-exact-active toc-link level3">11.有哪些依赖注入的方法？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#_12-spring-有哪些自动装配的方式" class="router-link-active router-link-exact-active toc-link level3">12.Spring 有哪些自动装配的方式？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#_13-spring-中的-bean-的作用域有哪些" class="router-link-active router-link-exact-active toc-link level3">13.Spring 中的 Bean 的作用域有哪些?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#_14-spring-中的单例-bean-会存在线程安全问题吗" class="router-link-active router-link-exact-active toc-link level3">14.Spring 中的单例 Bean 会存在线程安全问题吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#_15-说说循环依赖" class="router-link-active router-link-exact-active toc-link level3">15.说说循环依赖?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#_16-那-spring-怎么解决循环依赖的呢" class="router-link-active router-link-exact-active toc-link level3">16.那 Spring 怎么解决循环依赖的呢？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#_17-为什么要三级缓存-二级不行吗" class="router-link-active router-link-exact-active toc-link level3">17.为什么要三级缓存？⼆级不⾏吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#_18-autowired-的实现原理" class="router-link-active router-link-exact-active toc-link level3">18.@Autowired 的实现原理？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#aop" class="router-link-active router-link-exact-active toc-link level2">AOP</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#_19-说说什么是-aop" class="router-link-active router-link-exact-active toc-link level3">19.说说什么是 AOP？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#_20-说说你平时有用到-aop-吗" class="router-link-active router-link-exact-active toc-link level3">20.说说你平时有用到 AOP 吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#_21-说说-jdk-动态代理和-cglib-代理" class="router-link-active router-link-exact-active toc-link level3">21.说说 JDK 动态代理和 CGLIB 代理 ？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#_22-说说-spring-aop-和-aspectj-aop-区别" class="router-link-active router-link-exact-active toc-link level3">22.说说 Spring AOP 和 AspectJ AOP 区别?</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#事务" class="router-link-active router-link-exact-active toc-link level2">事务</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#_23-spring-事务的种类" class="router-link-active router-link-exact-active toc-link level3">23.Spring 事务的种类？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#_24-spring-的事务隔离级别" class="router-link-active router-link-exact-active toc-link level3">24.Spring 的事务隔离级别？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#_25-spring-的事务传播机制" class="router-link-active router-link-exact-active toc-link level3">25.Spring 的事务传播机制？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#_26-声明式事务实现原理了解吗" class="router-link-active router-link-exact-active toc-link level3">26.声明式事务实现原理了解吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#_27-声明式事务在哪些情况下会失效" class="router-link-active router-link-exact-active toc-link level3">27.声明式事务在哪些情况下会失效？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#mvc" class="router-link-active router-link-exact-active toc-link level2">MVC</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#_28-spring-mvc-的核心组件" class="router-link-active router-link-exact-active toc-link level3">28.Spring MVC 的核心组件？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#_29-spring-mvc-的工作流程" class="router-link-active router-link-exact-active toc-link level3">29.Spring MVC 的工作流程？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#_30-springmvc-restful-风格的接口的流程是什么样的呢" class="router-link-active router-link-exact-active toc-link level3">30.SpringMVC Restful 风格的接口的流程是什么样的呢？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#spring-boot" class="router-link-active router-link-exact-active toc-link level2">Spring Boot</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#_31-介绍一下-springboot-有哪些优点" class="router-link-active router-link-exact-active toc-link level3">31.介绍一下 SpringBoot，有哪些优点？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#_32-springboot-自动配置原理了解吗" class="router-link-active router-link-exact-active toc-link level3">32.SpringBoot 自动配置原理了解吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#_33-如何自定义一个-springboot-srarter" class="router-link-active router-link-exact-active toc-link level3">33.如何自定义一个 SpringBoot Srarter?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#_34-springboot-启动原理" class="router-link-active router-link-exact-active toc-link level3">34.Springboot 启动原理？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#spring-cloud" class="router-link-active router-link-exact-active toc-link level2">Spring Cloud</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#_35-对-springcloud-了解多少" class="router-link-active router-link-exact-active toc-link level3">35.对 SpringCloud 了解多少？</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="面渣逆袭-spring-必看" tabindex="-1"><a class="header-anchor" href="#面渣逆袭-spring-必看" aria-hidden="true">#</a> 面渣逆袭（Spring）必看👍</h1><blockquote><p>图文详解 35 道Spring面试高频题，这次吊打面试官，我觉得稳了（手动 dog）。整理：沉默王二，戳<a href="https://mp.weixin.qq.com/s/EQge6DmgIqYITM3mAxkatg" target="_blank" rel="noopener noreferrer">转载链接<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，作者：三分恶，戳<a href="https://mp.weixin.qq.com/s/Y17S85ntHm_MLTZMJdtjQQ" target="_blank" rel="noopener noreferrer">原文链接<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>。</p></blockquote><h2 id="基础" tabindex="-1"><a class="header-anchor" href="#基础" aria-hidden="true">#</a> 基础</h2><h3 id="_1-spring-是什么-特性-有哪些模块" tabindex="-1"><a class="header-anchor" href="#_1-spring-是什么-特性-有哪些模块" aria-hidden="true">#</a> 1.Spring 是什么？特性？有哪些模块？</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-165c27b4-2ea0-409a-8fa5-389c105db0fa.png" alt="Spring Logo"></p><p>一句话概括：<strong>Spring 是一个轻量级、非入侵式的控制反转 (IoC) 和面向切面 (AOP) 的框架。</strong></p><p>2003 年，一个音乐家 Rod Johnson 决定发展一个轻量级的 Java 开发框架，<code>Spring</code>作为 Java 战场的龙骑兵渐渐崛起，并淘汰了<code>EJB</code>这个传统的重装骑兵。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-5d9efb93-03a5-400c-8429-3be7c5eeddfb.png" alt="Spring重要版本"></p><p>到了现在，企业级开发的标配基本就是 <strong>Spring5</strong> + <strong>Spring Boot 2</strong> + <strong>JDK 8</strong></p><blockquote><p>Spring 有哪些特性呢？</p></blockquote><p>Spring 有很多优点：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-a0f0ef9d-3289-41ea-94c2-34b7e37ef854.png" alt="Spring特性"></p><ol><li><strong>IOC</strong> 和 <strong>DI</strong> 的支持</li></ol><p>Spring 的核心就是一个大的工厂容器，可以维护所有对象的创建和依赖关系，Spring 工厂用于生成 Bean，并且管理 Bean 的生命周期，实现<strong>高内聚低耦合</strong>的设计理念。</p><ol start="2"><li>AOP 编程的支持</li></ol><p>Spring 提供了<strong>面向切面编程</strong>，可以方便的实现对程序进行权限拦截、运行监控等切面功能。</p><ol start="3"><li>声明式事务的支持</li></ol><p>支持通过配置就来完成对事务的管理，而不需要通过硬编码的方式，以前重复的一些事务提交、回滚的 JDBC 代码，都可以不用自己写了。</p><ol start="4"><li>快捷测试的支持</li></ol><p>Spring 对 Junit 提供支持，可以通过<strong>注解</strong>快捷地测试 Spring 程序。</p><ol start="5"><li>快速集成功能</li></ol><p>方便集成各种优秀框架，Spring 不排斥各种优秀的开源框架，其内部提供了对各种优秀框架（如：Struts、Hibernate、MyBatis、Quartz 等）的直接支持。</p><ol start="6"><li>复杂 API 模板封装</li></ol><p>Spring 对 JavaEE 开发中非常难用的一些 API（JDBC、JavaMail、远程调用等）都提供了模板化的封装，这些封装 API 的提供使得应用难度大大降低。</p><h3 id="_2-spring-有哪些模块呢" tabindex="-1"><a class="header-anchor" href="#_2-spring-有哪些模块呢" aria-hidden="true">#</a> 2.Spring 有哪些模块呢？</h3><p>Spring 框架是分模块存在，除了最核心的<code>Spring Core Container</code>是必要模块之外，其他模块都是<code>可选</code>，大约有 20 多个模块。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-bb7c13ea-3174-4b32-84b8-821849ddc377.png" alt="Spring模块划分"></p><p>最主要的七大模块：</p><ol><li><strong>Spring Core</strong>：Spring 核心，它是框架最基础的部分，提供 IOC 和依赖注入 DI 特性。</li><li><strong>Spring Context</strong>：Spring 上下文容器，它是 BeanFactory 功能加强的一个子接口。</li><li><strong>Spring Web</strong>：它提供 Web 应用开发的支持。</li><li><strong>Spring MVC</strong>：它针对 Web 应用中 MVC 思想的实现。</li><li><strong>Spring DAO</strong>：提供对 JDBC 抽象层，简化了 JDBC 编码，同时，编码更具有健壮性。</li><li><strong>Spring ORM</strong>：它支持用于流行的 ORM 框架的整合，比如：Spring + Hibernate、Spring + iBatis、Spring + JDO 的整合等。</li><li><strong>Spring AOP</strong>：即面向切面编程，它提供了与 AOP 联盟兼容的编程实现。</li></ol><h3 id="_3-spring-有哪些常用注解呢" tabindex="-1"><a class="header-anchor" href="#_3-spring-有哪些常用注解呢" aria-hidden="true">#</a> 3.Spring 有哪些常用注解呢？</h3><p>Spring 有很多模块，甚至广义的 SpringBoot、SpringCloud 也算是 Spring 的一部分，我们来分模块，按功能来看一下一些常用的注解：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-8d0a1518-a425-4887-9735-45321095d927.png" alt="Spring常用注解"></p><p><strong>Web</strong>:</p><ul><li>@Controller：组合注解（组合了@Component 注解），应用在 MVC 层（控制层）。</li><li>@RestController：该注解为一个组合注解，相当于@Controller 和@ResponseBody 的组合，注解在类上，意味着，该 Controller 的所有方法都默认加上了@ResponseBody。</li><li>@RequestMapping：用于映射 Web 请求，包括访问路径和参数。如果是 Restful 风格接口，还可以根据请求类型使用不同的注解： <ul><li>@GetMapping</li><li>@PostMapping</li><li>@PutMapping</li><li>@DeleteMapping</li></ul></li><li>@ResponseBody：支持将返回值放在 response 内，而不是一个页面，通常用户返回 json 数据。</li><li>@RequestBody：允许 request 的参数在 request 体中，而不是在直接连接在地址后面。</li><li>@PathVariable：用于接收路径参数，比如 <code>@RequestMapping(“/hello/{name}”)</code>申明的路径，将注解放在参数中前，即可获取该值，通常作为 Restful 的接口实现方法。</li><li>@RestController：该注解为一个组合注解，相当于@Controller 和@ResponseBody 的组合，注解在类上，意味着，该 Controller 的所有方法都默认加上了@ResponseBody。</li></ul><p><strong>容器</strong>:</p><ul><li>@Component：表示一个带注释的类是一个“组件”，成为 Spring 管理的 Bean。当使用基于注解的配置和类路径扫描时，这些类被视为自动检测的候选对象。同时@Component 还是一个元注解。</li><li>@Service：组合注解（组合了@Component 注解），应用在 service 层（业务逻辑层）。</li><li>@Repository：组合注解（组合了@Component 注解），应用在 dao 层（数据访问层）。</li><li>@Autowired：Spring 提供的工具（由 Spring 的依赖注入工具（BeanPostProcessor、BeanFactoryPostProcessor）自动注入）。</li><li>@Qualifier：该注解通常跟 @Autowired 一起使用，当想对注入的过程做更多的控制，@Qualifier 可帮助配置，比如两个以上相同类型的 Bean 时 Spring 无法抉择，用到此注解</li><li>@Configuration：声明当前类是一个配置类（相当于一个 Spring 配置的 xml 文件）</li><li>@Value：可用在字段，构造器参数跟方法参数，指定一个默认值，支持 <code>#{} 跟 \${}</code> 两个方式。一般将 SpringbBoot 中的 application.properties 配置的属性值赋值给变量。</li><li>@Bean：注解在方法上，声明当前方法的返回值为一个 Bean。返回的 Bean 对应的类中可以定义 init()方法和 destroy()方法，然后在<code>@Bean(initMethod=”init”,destroyMethod=”destroy”)</code>定义，在构造之后执行 init，在销毁之前执行 destroy。</li><li>@Scope:定义我们采用什么模式去创建 Bean（方法上，得有@Bean） 其设置类型包括：Singleton 、Prototype、Request 、 Session、GlobalSession。</li></ul><p><strong>AOP</strong>:</p><ul><li>@Aspect:声明一个切面（类上） 使用@After、@Before、@Around 定义建言（advice），可直接将拦截规则（切点）作为参数。 <ul><li><code>@After</code> ：在方法执行之后执行（方法上）。</li><li><code>@Before</code>： 在方法执行之前执行（方法上）。</li><li><code>@Around</code>： 在方法执行之前与之后执行（方法上）。</li><li><code>@PointCut</code>： 声明切点 在 java 配置类中使用@EnableAspectJAutoProxy 注解开启 Spring 对 AspectJ 代理的支持（类上）。</li></ul></li></ul><p><strong>事务：</strong></p><ul><li>@Transactional：在要开启事务的方法上使用@Transactional 注解，即可声明式开启事务。</li></ul><h3 id="_4-spring-中应用了哪些设计模式呢" tabindex="-1"><a class="header-anchor" href="#_4-spring-中应用了哪些设计模式呢" aria-hidden="true">#</a> 4.Spring 中应用了哪些设计模式呢？</h3><p>Spring 框架中广泛使用了不同类型的设计模式，下面我们来看看到底有哪些设计模式?</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-ee1c5cee-8462-4bae-93ea-ec936cc77640.png" alt="Spring中用到的设计模式"></p><ol><li><strong>工厂模式</strong> : Spring 容器本质是一个大工厂，使用工厂模式通过 BeanFactory、ApplicationContext 创建 bean 对象。</li><li><strong>代理模式</strong> : Spring AOP 功能功能就是通过代理模式来实现的，分为动态代理和静态代理。</li><li><strong>单例模式</strong> : Spring 中的 Bean 默认都是单例的，这样有利于容器对 Bean 的管理。</li><li><strong>模板模式</strong> : Spring 中 JdbcTemplate、RestTemplate 等以 Template 结尾的对数据库、网络等等进行操作的模板类，就使用到了模板模式。</li><li><strong>观察者模式</strong>: Spring 事件驱动模型就是观察者模式很经典的一个应用。</li><li><strong>适配器模式</strong> :Spring AOP 的增强或通知 (Advice) 使用到了适配器模式、Spring MVC 中也是用到了适配器模式适配 Controller。</li><li><strong>策略模式</strong>：Spring 中有一个 Resource 接口，它的不同实现类，会根据不同的策略去访问资源。</li></ol><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><h2 id="ioc" tabindex="-1"><a class="header-anchor" href="#ioc" aria-hidden="true">#</a> IOC</h2><h3 id="_5-说一说什么是-ioc-什么是-di" tabindex="-1"><a class="header-anchor" href="#_5-说一说什么是-ioc-什么是-di" aria-hidden="true">#</a> 5.说一说什么是 IOC？什么是 DI?</h3><p>Java 是面向对象的编程语言，一个个实例对象相互合作组成了业务逻辑，原来，我们都是在代码里创建对象和对象的依赖。</p><p>所谓的<strong>IOC</strong>（控制反转）：就是由容器来负责控制对象的生命周期和对象间的关系。以前是我们想要什么，就自己创建什么，现在是我们需要什么，容器就给我们送来什么。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-619da277-c15e-4dd7-9f2b-dbd809a9aaa0.png" alt="引入IOC之前和引入IOC之后"></p><p>也就是说，控制对象生命周期的不再是引用它的对象，而是容器。对具体对象，以前是它控制其它对象，现在所有对象都被容器控制，所以这就叫<strong>控制反转</strong>。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-440f5d0e-f4db-462c-97fb-d54407a354d5.png" alt="控制反转示意图"></p><p><strong>DI（依赖注入）</strong>：指的是容器在实例化对象的时候把它依赖的类注入给它。有的说法 IOC 和 DI 是一回事，有的说法是 IOC 是思想，DI 是 IOC 的实现。</p><blockquote><p><strong>为什么要使用 IOC 呢？</strong></p></blockquote><p>最主要的是两个字<strong>解耦</strong>，硬编码会造成对象间的过度耦合，使用 IOC 之后，我们可以不用关心对象间的依赖，专心开发应用就行。</p><h3 id="_6-能简单说一下-spring-ioc-的实现机制吗" tabindex="-1"><a class="header-anchor" href="#_6-能简单说一下-spring-ioc-的实现机制吗" aria-hidden="true">#</a> 6.能简单说一下 Spring IOC 的实现机制吗？</h3><p>PS:这道题老三在面试中被问到过，问法是“<strong>你有自己实现过简单的 Spring 吗？</strong>”</p><p>Spring 的 IOC 本质就是一个大工厂，我们想想一个工厂是怎么运行的呢？</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-7678c40f-a48d-4bd5-80f8-e902ad688e11.png" alt="工厂运行"></p><ul><li><p><strong>生产产品</strong>：一个工厂最核心的功能就是生产产品。在 Spring 里，不用 Bean 自己来实例化，而是交给 Spring，应该怎么实现呢？——答案毫无疑问，<strong>反射</strong>。</p><p>那么这个厂子的生产管理是怎么做的？你应该也知道——<strong>工厂模式</strong>。</p></li><li><p><strong>库存产品</strong>：工厂一般都是有库房的，用来库存产品，毕竟生产的产品不能立马就拉走。Spring 我们都知道是一个容器，这个容器里存的就是对象，不能每次来取对象，都得现场来反射创建对象，得把创建出的对象存起来。</p></li><li><p><strong>订单处理</strong>：还有最重要的一点，工厂根据什么来提供产品呢？订单。这些订单可能五花八门，有线上签签的、有到工厂签的、还有工厂销售上门签的……最后经过处理，指导工厂的出货。</p><p>在 Spring 里，也有这样的订单，它就是我们 bean 的定义和依赖关系，可以是 xml 形式，也可以是我们最熟悉的注解形式。</p></li></ul><p>我们简单地实现一个 mini 版的 Spring IOC：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-1d55c63d-2d12-43b1-9f43-428f5f4a1413.png" alt="mini版本Spring IOC"></p><p><strong>Bean 定义：</strong></p><p>Bean 通过一个配置文件定义，把它解析成一个类型。</p><ul><li><p>beans.properties</p><p>偷懒，这里直接用了最方便解析的 properties，这里直接用一个<code>&lt;key,value&gt;</code>类型的配置来代表 Bean 的定义，其中 key 是 beanName，value 是 class</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code>userDao<span class="token operator">:</span><span class="token class-name"><span class="token namespace">cn<span class="token punctuation">.</span>fighter3<span class="token punctuation">.</span>bean<span class="token punctuation">.</span></span>UserDao</span>
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id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->面渣逆袭（Spring）必看👍</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg 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213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 54 分钟</span><meta property="timeRequired" content="PT54M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#基础" class="router-link-active router-link-exact-active toc-link level2">基础</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#_1-spring-是什么-特性-有哪些模块" class="router-link-active router-link-exact-active toc-link level3">1.Spring 是什么？特性？有哪些模块？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#_2-spring-有哪些模块呢" class="router-link-active router-link-exact-active toc-link level3">2.Spring 有哪些模块呢？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#_3-spring-有哪些常用注解呢" class="router-link-active router-link-exact-active toc-link level3">3.Spring 有哪些常用注解呢？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#_4-spring-中应用了哪些设计模式呢" class="router-link-active router-link-exact-active toc-link level3">4.Spring 中应用了哪些设计模式呢？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#ioc" class="router-link-active router-link-exact-active toc-link level2">IOC</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#_5-说一说什么是-ioc-什么是-di" class="router-link-active router-link-exact-active toc-link level3">5.说一说什么是 IOC？什么是 DI?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#_6-能简单说一下-spring-ioc-的实现机制吗" class="router-link-active router-link-exact-active toc-link level3">6.能简单说一下 Spring IOC 的实现机制吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#_7-说说-beanfactory-和-applicantcontext" class="router-link-active router-link-exact-active toc-link level3">7.说说 BeanFactory 和 ApplicantContext?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#_8-你知道-spring-容器启动阶段会干什么吗" class="router-link-active router-link-exact-active toc-link level3">8.你知道 Spring 容器启动阶段会干什么吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#_9-能说一下-spring-bean-生命周期吗" class="router-link-active router-link-exact-active toc-link level3">9.能说一下 Spring Bean 生命周期吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#_10-bean-定义和依赖定义有哪些方式" class="router-link-active router-link-exact-active toc-link level3">10.Bean 定义和依赖定义有哪些方式？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#_11-有哪些依赖注入的方法" class="router-link-active router-link-exact-active toc-link level3">11.有哪些依赖注入的方法？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#_12-spring-有哪些自动装配的方式" class="router-link-active router-link-exact-active toc-link level3">12.Spring 有哪些自动装配的方式？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#_13-spring-中的-bean-的作用域有哪些" class="router-link-active router-link-exact-active toc-link level3">13.Spring 中的 Bean 的作用域有哪些?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#_14-spring-中的单例-bean-会存在线程安全问题吗" class="router-link-active router-link-exact-active toc-link level3">14.Spring 中的单例 Bean 会存在线程安全问题吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#_15-说说循环依赖" class="router-link-active router-link-exact-active toc-link level3">15.说说循环依赖?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#_16-那-spring-怎么解决循环依赖的呢" class="router-link-active router-link-exact-active toc-link level3">16.那 Spring 怎么解决循环依赖的呢？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#_17-为什么要三级缓存-二级不行吗" class="router-link-active router-link-exact-active toc-link level3">17.为什么要三级缓存？⼆级不⾏吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#_18-autowired-的实现原理" class="router-link-active router-link-exact-active toc-link level3">18.@Autowired 的实现原理？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#aop" class="router-link-active router-link-exact-active toc-link level2">AOP</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#_19-说说什么是-aop" class="router-link-active router-link-exact-active toc-link level3">19.说说什么是 AOP？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#_20-说说你平时有用到-aop-吗" class="router-link-active router-link-exact-active toc-link level3">20.说说你平时有用到 AOP 吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#_21-说说-jdk-动态代理和-cglib-代理" class="router-link-active router-link-exact-active toc-link level3">21.说说 JDK 动态代理和 CGLIB 代理 ？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#_22-说说-spring-aop-和-aspectj-aop-区别" class="router-link-active router-link-exact-active toc-link level3">22.说说 Spring AOP 和 AspectJ AOP 区别?</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#事务" class="router-link-active router-link-exact-active toc-link level2">事务</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#_23-spring-事务的种类" class="router-link-active router-link-exact-active toc-link level3">23.Spring 事务的种类？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#_24-spring-的事务隔离级别" class="router-link-active router-link-exact-active toc-link level3">24.Spring 的事务隔离级别？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#_25-spring-的事务传播机制" class="router-link-active router-link-exact-active toc-link level3">25.Spring 的事务传播机制？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#_26-声明式事务实现原理了解吗" class="router-link-active router-link-exact-active toc-link level3">26.声明式事务实现原理了解吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#_27-声明式事务在哪些情况下会失效" class="router-link-active router-link-exact-active toc-link level3">27.声明式事务在哪些情况下会失效？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#mvc" class="router-link-active router-link-exact-active toc-link level2">MVC</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#_28-spring-mvc-的核心组件" class="router-link-active router-link-exact-active toc-link level3">28.Spring MVC 的核心组件？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#_29-spring-mvc-的工作流程" class="router-link-active router-link-exact-active toc-link level3">29.Spring MVC 的工作流程？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#_30-springmvc-restful-风格的接口的流程是什么样的呢" class="router-link-active router-link-exact-active toc-link level3">30.SpringMVC Restful 风格的接口的流程是什么样的呢？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#spring-boot" class="router-link-active router-link-exact-active toc-link level2">Spring Boot</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#_31-介绍一下-springboot-有哪些优点" class="router-link-active router-link-exact-active toc-link level3">31.介绍一下 SpringBoot，有哪些优点？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#_32-springboot-自动配置原理了解吗" class="router-link-active router-link-exact-active toc-link level3">32.SpringBoot 自动配置原理了解吗？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#_33-如何自定义一个-springboot-srarter" class="router-link-active router-link-exact-active toc-link level3">33.如何自定义一个 SpringBoot Srarter?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#_34-springboot-启动原理" class="router-link-active router-link-exact-active toc-link level3">34.Springboot 启动原理？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#spring-cloud" class="router-link-active router-link-exact-active toc-link level2">Spring Cloud</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/sidebar/sanfene/spring.html#_35-对-springcloud-了解多少" class="router-link-active router-link-exact-active toc-link level3">35.对 SpringCloud 了解多少？</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="面渣逆袭-spring-必看" tabindex="-1"><a class="header-anchor" href="#面渣逆袭-spring-必看" aria-hidden="true">#</a> 面渣逆袭（Spring）必看👍</h1><blockquote><p>图文详解 35 道Spring面试高频题，这次吊打面试官，我觉得稳了（手动 dog）。整理：沉默王二，戳<a href="https://mp.weixin.qq.com/s/EQge6DmgIqYITM3mAxkatg" target="_blank" rel="noopener noreferrer">转载链接<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，作者：三分恶，戳<a href="https://mp.weixin.qq.com/s/Y17S85ntHm_MLTZMJdtjQQ" target="_blank" rel="noopener noreferrer">原文链接<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>。</p></blockquote><h2 id="基础" tabindex="-1"><a class="header-anchor" href="#基础" aria-hidden="true">#</a> 基础</h2><h3 id="_1-spring-是什么-特性-有哪些模块" tabindex="-1"><a class="header-anchor" href="#_1-spring-是什么-特性-有哪些模块" aria-hidden="true">#</a> 1.Spring 是什么？特性？有哪些模块？</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-165c27b4-2ea0-409a-8fa5-389c105db0fa.png" alt="Spring Logo"></p><p>一句话概括：<strong>Spring 是一个轻量级、非入侵式的控制反转 (IoC) 和面向切面 (AOP) 的框架。</strong></p><p>2003 年，一个音乐家 Rod Johnson 决定发展一个轻量级的 Java 开发框架，<code>Spring</code>作为 Java 战场的龙骑兵渐渐崛起，并淘汰了<code>EJB</code>这个传统的重装骑兵。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-5d9efb93-03a5-400c-8429-3be7c5eeddfb.png" alt="Spring重要版本"></p><p>到了现在，企业级开发的标配基本就是 <strong>Spring5</strong> + <strong>Spring Boot 2</strong> + <strong>JDK 8</strong></p><blockquote><p>Spring 有哪些特性呢？</p></blockquote><p>Spring 有很多优点：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-a0f0ef9d-3289-41ea-94c2-34b7e37ef854.png" alt="Spring特性"></p><ol><li><strong>IOC</strong> 和 <strong>DI</strong> 的支持</li></ol><p>Spring 的核心就是一个大的工厂容器，可以维护所有对象的创建和依赖关系，Spring 工厂用于生成 Bean，并且管理 Bean 的生命周期，实现<strong>高内聚低耦合</strong>的设计理念。</p><ol start="2"><li>AOP 编程的支持</li></ol><p>Spring 提供了<strong>面向切面编程</strong>，可以方便的实现对程序进行权限拦截、运行监控等切面功能。</p><ol start="3"><li>声明式事务的支持</li></ol><p>支持通过配置就来完成对事务的管理，而不需要通过硬编码的方式，以前重复的一些事务提交、回滚的 JDBC 代码，都可以不用自己写了。</p><ol start="4"><li>快捷测试的支持</li></ol><p>Spring 对 Junit 提供支持，可以通过<strong>注解</strong>快捷地测试 Spring 程序。</p><ol start="5"><li>快速集成功能</li></ol><p>方便集成各种优秀框架，Spring 不排斥各种优秀的开源框架，其内部提供了对各种优秀框架（如：Struts、Hibernate、MyBatis、Quartz 等）的直接支持。</p><ol start="6"><li>复杂 API 模板封装</li></ol><p>Spring 对 JavaEE 开发中非常难用的一些 API（JDBC、JavaMail、远程调用等）都提供了模板化的封装，这些封装 API 的提供使得应用难度大大降低。</p><h3 id="_2-spring-有哪些模块呢" tabindex="-1"><a class="header-anchor" href="#_2-spring-有哪些模块呢" aria-hidden="true">#</a> 2.Spring 有哪些模块呢？</h3><p>Spring 框架是分模块存在，除了最核心的<code>Spring Core Container</code>是必要模块之外，其他模块都是<code>可选</code>，大约有 20 多个模块。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-bb7c13ea-3174-4b32-84b8-821849ddc377.png" alt="Spring模块划分"></p><p>最主要的七大模块：</p><ol><li><strong>Spring Core</strong>：Spring 核心，它是框架最基础的部分，提供 IOC 和依赖注入 DI 特性。</li><li><strong>Spring Context</strong>：Spring 上下文容器，它是 BeanFactory 功能加强的一个子接口。</li><li><strong>Spring Web</strong>：它提供 Web 应用开发的支持。</li><li><strong>Spring MVC</strong>：它针对 Web 应用中 MVC 思想的实现。</li><li><strong>Spring DAO</strong>：提供对 JDBC 抽象层，简化了 JDBC 编码，同时，编码更具有健壮性。</li><li><strong>Spring ORM</strong>：它支持用于流行的 ORM 框架的整合，比如：Spring + Hibernate、Spring + iBatis、Spring + JDO 的整合等。</li><li><strong>Spring AOP</strong>：即面向切面编程，它提供了与 AOP 联盟兼容的编程实现。</li></ol><h3 id="_3-spring-有哪些常用注解呢" tabindex="-1"><a class="header-anchor" href="#_3-spring-有哪些常用注解呢" aria-hidden="true">#</a> 3.Spring 有哪些常用注解呢？</h3><p>Spring 有很多模块，甚至广义的 SpringBoot、SpringCloud 也算是 Spring 的一部分，我们来分模块，按功能来看一下一些常用的注解：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-8d0a1518-a425-4887-9735-45321095d927.png" alt="Spring常用注解"></p><p><strong>Web</strong>:</p><ul><li>@Controller：组合注解（组合了@Component 注解），应用在 MVC 层（控制层）。</li><li>@RestController：该注解为一个组合注解，相当于@Controller 和@ResponseBody 的组合，注解在类上，意味着，该 Controller 的所有方法都默认加上了@ResponseBody。</li><li>@RequestMapping：用于映射 Web 请求，包括访问路径和参数。如果是 Restful 风格接口，还可以根据请求类型使用不同的注解： <ul><li>@GetMapping</li><li>@PostMapping</li><li>@PutMapping</li><li>@DeleteMapping</li></ul></li><li>@ResponseBody：支持将返回值放在 response 内，而不是一个页面，通常用户返回 json 数据。</li><li>@RequestBody：允许 request 的参数在 request 体中，而不是在直接连接在地址后面。</li><li>@PathVariable：用于接收路径参数，比如 <code>@RequestMapping(“/hello/{name}”)</code>申明的路径，将注解放在参数中前，即可获取该值，通常作为 Restful 的接口实现方法。</li><li>@RestController：该注解为一个组合注解，相当于@Controller 和@ResponseBody 的组合，注解在类上，意味着，该 Controller 的所有方法都默认加上了@ResponseBody。</li></ul><p><strong>容器</strong>:</p><ul><li>@Component：表示一个带注释的类是一个“组件”，成为 Spring 管理的 Bean。当使用基于注解的配置和类路径扫描时，这些类被视为自动检测的候选对象。同时@Component 还是一个元注解。</li><li>@Service：组合注解（组合了@Component 注解），应用在 service 层（业务逻辑层）。</li><li>@Repository：组合注解（组合了@Component 注解），应用在 dao 层（数据访问层）。</li><li>@Autowired：Spring 提供的工具（由 Spring 的依赖注入工具（BeanPostProcessor、BeanFactoryPostProcessor）自动注入）。</li><li>@Qualifier：该注解通常跟 @Autowired 一起使用，当想对注入的过程做更多的控制，@Qualifier 可帮助配置，比如两个以上相同类型的 Bean 时 Spring 无法抉择，用到此注解</li><li>@Configuration：声明当前类是一个配置类（相当于一个 Spring 配置的 xml 文件）</li><li>@Value：可用在字段，构造器参数跟方法参数，指定一个默认值，支持 <code>#{} 跟 \${}</code> 两个方式。一般将 SpringbBoot 中的 application.properties 配置的属性值赋值给变量。</li><li>@Bean：注解在方法上，声明当前方法的返回值为一个 Bean。返回的 Bean 对应的类中可以定义 init()方法和 destroy()方法，然后在<code>@Bean(initMethod=”init”,destroyMethod=”destroy”)</code>定义，在构造之后执行 init，在销毁之前执行 destroy。</li><li>@Scope:定义我们采用什么模式去创建 Bean（方法上，得有@Bean） 其设置类型包括：Singleton 、Prototype、Request 、 Session、GlobalSession。</li></ul><p><strong>AOP</strong>:</p><ul><li>@Aspect:声明一个切面（类上） 使用@After、@Before、@Around 定义建言（advice），可直接将拦截规则（切点）作为参数。 <ul><li><code>@After</code> ：在方法执行之后执行（方法上）。</li><li><code>@Before</code>： 在方法执行之前执行（方法上）。</li><li><code>@Around</code>： 在方法执行之前与之后执行（方法上）。</li><li><code>@PointCut</code>： 声明切点 在 java 配置类中使用@EnableAspectJAutoProxy 注解开启 Spring 对 AspectJ 代理的支持（类上）。</li></ul></li></ul><p><strong>事务：</strong></p><ul><li>@Transactional：在要开启事务的方法上使用@Transactional 注解，即可声明式开启事务。</li></ul><h3 id="_4-spring-中应用了哪些设计模式呢" tabindex="-1"><a class="header-anchor" href="#_4-spring-中应用了哪些设计模式呢" aria-hidden="true">#</a> 4.Spring 中应用了哪些设计模式呢？</h3><p>Spring 框架中广泛使用了不同类型的设计模式，下面我们来看看到底有哪些设计模式?</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-ee1c5cee-8462-4bae-93ea-ec936cc77640.png" alt="Spring中用到的设计模式"></p><ol><li><strong>工厂模式</strong> : Spring 容器本质是一个大工厂，使用工厂模式通过 BeanFactory、ApplicationContext 创建 bean 对象。</li><li><strong>代理模式</strong> : Spring AOP 功能功能就是通过代理模式来实现的，分为动态代理和静态代理。</li><li><strong>单例模式</strong> : Spring 中的 Bean 默认都是单例的，这样有利于容器对 Bean 的管理。</li><li><strong>模板模式</strong> : Spring 中 JdbcTemplate、RestTemplate 等以 Template 结尾的对数据库、网络等等进行操作的模板类，就使用到了模板模式。</li><li><strong>观察者模式</strong>: Spring 事件驱动模型就是观察者模式很经典的一个应用。</li><li><strong>适配器模式</strong> :Spring AOP 的增强或通知 (Advice) 使用到了适配器模式、Spring MVC 中也是用到了适配器模式适配 Controller。</li><li><strong>策略模式</strong>：Spring 中有一个 Resource 接口，它的不同实现类，会根据不同的策略去访问资源。</li></ol><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><h2 id="ioc" tabindex="-1"><a class="header-anchor" href="#ioc" aria-hidden="true">#</a> IOC</h2><h3 id="_5-说一说什么是-ioc-什么是-di" tabindex="-1"><a class="header-anchor" href="#_5-说一说什么是-ioc-什么是-di" aria-hidden="true">#</a> 5.说一说什么是 IOC？什么是 DI?</h3><p>Java 是面向对象的编程语言，一个个实例对象相互合作组成了业务逻辑，原来，我们都是在代码里创建对象和对象的依赖。</p><p>所谓的<strong>IOC</strong>（控制反转）：就是由容器来负责控制对象的生命周期和对象间的关系。以前是我们想要什么，就自己创建什么，现在是我们需要什么，容器就给我们送来什么。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-619da277-c15e-4dd7-9f2b-dbd809a9aaa0.png" alt="引入IOC之前和引入IOC之后"></p><p>也就是说，控制对象生命周期的不再是引用它的对象，而是容器。对具体对象，以前是它控制其它对象，现在所有对象都被容器控制，所以这就叫<strong>控制反转</strong>。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-440f5d0e-f4db-462c-97fb-d54407a354d5.png" alt="控制反转示意图"></p><p><strong>DI（依赖注入）</strong>：指的是容器在实例化对象的时候把它依赖的类注入给它。有的说法 IOC 和 DI 是一回事，有的说法是 IOC 是思想，DI 是 IOC 的实现。</p><blockquote><p><strong>为什么要使用 IOC 呢？</strong></p></blockquote><p>最主要的是两个字<strong>解耦</strong>，硬编码会造成对象间的过度耦合，使用 IOC 之后，我们可以不用关心对象间的依赖，专心开发应用就行。</p><h3 id="_6-能简单说一下-spring-ioc-的实现机制吗" tabindex="-1"><a class="header-anchor" href="#_6-能简单说一下-spring-ioc-的实现机制吗" aria-hidden="true">#</a> 6.能简单说一下 Spring IOC 的实现机制吗？</h3><p>PS:这道题老三在面试中被问到过，问法是“<strong>你有自己实现过简单的 Spring 吗？</strong>”</p><p>Spring 的 IOC 本质就是一个大工厂，我们想想一个工厂是怎么运行的呢？</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-7678c40f-a48d-4bd5-80f8-e902ad688e11.png" alt="工厂运行"></p><ul><li><p><strong>生产产品</strong>：一个工厂最核心的功能就是生产产品。在 Spring 里，不用 Bean 自己来实例化，而是交给 Spring，应该怎么实现呢？——答案毫无疑问，<strong>反射</strong>。</p><p>那么这个厂子的生产管理是怎么做的？你应该也知道——<strong>工厂模式</strong>。</p></li><li><p><strong>库存产品</strong>：工厂一般都是有库房的，用来库存产品，毕竟生产的产品不能立马就拉走。Spring 我们都知道是一个容器，这个容器里存的就是对象，不能每次来取对象，都得现场来反射创建对象，得把创建出的对象存起来。</p></li><li><p><strong>订单处理</strong>：还有最重要的一点，工厂根据什么来提供产品呢？订单。这些订单可能五花八门，有线上签签的、有到工厂签的、还有工厂销售上门签的……最后经过处理，指导工厂的出货。</p><p>在 Spring 里，也有这样的订单，它就是我们 bean 的定义和依赖关系，可以是 xml 形式，也可以是我们最熟悉的注解形式。</p></li></ul><p>我们简单地实现一个 mini 版的 Spring IOC：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-1d55c63d-2d12-43b1-9f43-428f5f4a1413.png" alt="mini版本Spring IOC"></p><p><strong>Bean 定义：</strong></p><p>Bean 通过一个配置文件定义，把它解析成一个类型。</p><ul><li><p>beans.properties</p><p>偷懒，这里直接用了最方便解析的 properties，这里直接用一个<code>&lt;key,value&gt;</code>类型的配置来代表 Bean 的定义，其中 key 是 beanName，value 是 class</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code>userDao<span class="token operator">:</span><span class="token class-name"><span class="token namespace">cn<span class="token punctuation">.</span>fighter3<span class="token punctuation">.</span>bean<span class="token punctuation">.</span></span>UserDao</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div></li><li><p>BeanDefinition.java</p><p>bean 定义类，配置文件中 bean 定义对应的实体</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">BeanDefinition</span> <span class="token punctuation">{</span>
 
     <span class="token keyword">private</span> <span class="token class-name">String</span> beanName<span class="token punctuation">;</span>
@@ -707,6 +707,6 @@ A</span> good man<span class="token punctuation">.</span>
     <span class="token punctuation">}</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div></li></ul></li></ol><ul><li>运行结果</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-3ff3cc21-6a56-434b-a89e-d2b55d558bd6.png" alt="运行结果"></p><p>至此，随手写的一个自定义 SpringBoot-Starter 就完成了，虽然比较简单，但是完成了主要的自动装配的能力。</p><h3 id="_34-springboot-启动原理" tabindex="-1"><a class="header-anchor" href="#_34-springboot-启动原理" aria-hidden="true">#</a> 34.Springboot 启动原理？</h3><p>SpringApplication 这个类主要做了以下四件事情：</p><ol><li>推断应用的类型是普通的项目还是 Web 项目</li><li>查找并加载所有可用初始化器 ， 设置到 initializers 属性中</li><li>找出所有的应用程序监听器，设置到 listeners 属性中</li><li>推断并设置 main 方法的定义类，找到运行的主类</li></ol><p>SpringBoot 启动大致流程如下 ：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-68744556-a1ba-4e1f-a092-1582875f0da6.png" alt="SpringBoot 启动大致流程-图片来源网络"></p><h2 id="spring-cloud" tabindex="-1"><a class="header-anchor" href="#spring-cloud" aria-hidden="true">#</a> Spring Cloud</h2><h3 id="_35-对-springcloud-了解多少" tabindex="-1"><a class="header-anchor" href="#_35-对-springcloud-了解多少" aria-hidden="true">#</a> 35.对 SpringCloud 了解多少？</h3><p>SpringCloud 是 Spring 官方推出的微服务治理框架。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-92ab53d5-f303-4fc5-bd26-e62cefe374b3.png" alt="Spring Cloud Netfilx核心组件-来源参考[2]"></p><blockquote><p><strong>什么是微服务？</strong></p></blockquote><ol><li>2014 年 <strong>Martin Fowler</strong> 提出的一种新的架构形式。微服务架构是一种<strong>架构模式</strong>，提倡将单一应用程序划分成一组小的服务，服务之间相互协调，互相配合，为用户提供最终价值。每个服务运行在其独立的进程中，服务与服务之间采用轻量级的通信机制(如 HTTP 或 Dubbo)互相协作，每个服务都围绕着具体的业务进行构建，并且能够被独立的部署到生产环境中，另外，应尽量避免统一的，集中式的服务管理机制，对具体的一个服务而言，应根据业务上下文，选择合适的语言、工具(如 Maven)对其进行构建。</li><li>微服务化的核心就是将传统的一站式应用，根据业务拆分成一个一个的服务，彻底地去耦合，每一个微服务提供单个业务功能的服务，一个服务做一件事情，从技术角度看就是一种小而独立的处理过程，类似进程的概念，能够自行单独启动或销毁，拥有自己独立的数据库。</li></ol><blockquote><p><strong>微服务架构主要要解决哪些问题？</strong></p></blockquote><ol><li>服务很多，客户端怎么访问，如何提供对外网关?</li><li>这么多服务，服务之间如何通信? HTTP 还是 RPC?</li><li>这么多服务，如何治理? 服务的注册和发现。</li><li>服务挂了怎么办？熔断机制。</li></ol><blockquote><p><strong>有哪些主流微服务框架？</strong></p></blockquote><ol><li>Spring Cloud Netflix</li><li>Spring Cloud Alibaba</li><li>SpringBoot + Dubbo + ZooKeeper</li></ol><blockquote><p><strong>SpringCloud 有哪些核心组件？</strong></p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/sidebar/sanfene/spring-2b988a72-0739-4fed-b271-eaf12589444f.png" alt="SpringCloud"></p><p>PS:微服务后面有机会再扩展，其实面试一般都是结合项目去问。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p><blockquote><p>图文详解 35 道Spring面试高频题，这次吊打面试官，我觉得稳了（手动 dog）。整理：沉默王二，戳<a href="https://mp.weixin.qq.com/s/EQge6DmgIqYITM3mAxkatg" target="_blank" rel="noopener noreferrer">转载链接<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，作者：三分恶，戳<a href="https://mp.weixin.qq.com/s/Y17S85ntHm_MLTZMJdtjQQ" target="_blank" rel="noopener noreferrer">原文链接<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>。</p></blockquote></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/sidebar/sanfene/spring.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/12 下午4:24:21</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/sidebar/sanfene/jvm.html" class="nav-link prev" aria-label="Java 虚拟机"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->Java 虚拟机</div></a><a href="/sidebar/sanfene/redis.html" class="nav-link next" aria-label="Redis"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">Redis<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 6 分钟</span><meta property="timeRequired" content="PT6M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/Filter-Interceptor-Listener.html#前言" class="router-link-active router-link-exact-active toc-link level3">前言</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/Filter-Interceptor-Listener.html#过滤器" class="router-link-active router-link-exact-active toc-link level3">过滤器</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/Filter-Interceptor-Listener.html#拦截器" class="router-link-active router-link-exact-active toc-link level3">拦截器</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/Filter-Interceptor-Listener.html#监听器" class="router-link-active router-link-exact-active toc-link level3">监听器</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/Filter-Interceptor-Listener.html#源码路径" class="router-link-active router-link-exact-active toc-link level3">源码路径：</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h3 id="前言" tabindex="-1"><a class="header-anchor" href="#前言" aria-hidden="true">#</a> 前言</h3><p>先说作用。</p><ul><li>过滤器（Filter）：当有一堆请求，只希望符合预期的请求进来。</li><li>拦截器（Interceptor）：想要干涉预期的请求。</li><li>监听器（Listener）：想要监听这些请求具体做了什么。</li></ul><p>再说区别。</p><p>过滤器是在请求进入容器后，但还没有进入 Servlet 之前进行预处理的。如下图所示。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/Filter-Interceptor-Listener-2a28621b-2cc1-4d29-87a1-cf6a01d95443.png" alt=""></p><p>拦截器是在请求进入控制器（Controller） 之前进行预处理的。</p><p>虚线内就是过滤器和拦截器的作用范围：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/Filter-Interceptor-Listener-dd48851b-c123-4fd8-b82d-9ae87b33745d.png" alt=""></p><p>过滤器依赖于 Servlet 容器，而拦截器依赖于 Spring 的 IoC 容器，因此可以通过注入的方式获取容器当中的对象。</p><p>监听器用于监听 Web 应用中某些对象的创建、销毁、增加、修改、删除等动作，然后做出相应的处理。</p><h3 id="过滤器" tabindex="-1"><a class="header-anchor" href="#过滤器" aria-hidden="true">#</a> 过滤器</h3><ul><li>过滤敏感词汇（防止sql注入）</li><li>设置字符编码</li><li>URL级别的权限访问控制</li><li>压缩响应信息</li></ul><p>过滤器的创建和销毁都由 Web 服务器负责，Web 应用程序启动的时候，创建过滤器对象，为后续的请求过滤做好准备。</p><p>过滤器可以有很多个，一个个过滤器组合起来就成了 FilterChain，也就是过滤器链。</p><p>在 Spring 中，过滤器都默认继承了 OncePerRequestFilter，顾名思义，OncePerRequestFilter 的作用就是确保一次请求只通过一次过滤器，而不重复执行。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/Filter-Interceptor-Listener-aaa1c537-c8ed-4c5d-b27f-93c1409f2748.png" alt=""></p><p>在编程喵实战项目中，我们就是通过继承 OncePerRequestFilter 来实现 JWT 登录授权过滤的。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">JwtAuthenticationTokenFilter</span> <span class="token keyword">extends</span> <span class="token class-name">OncePerRequestFilter</span> <span class="token punctuation">{</span>
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class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.8 消息队列</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow 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class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/Filter-Interceptor-Listener.html#前言" class="router-link-active router-link-exact-active toc-link level2">前言</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/Filter-Interceptor-Listener.html#过滤器" class="router-link-active router-link-exact-active toc-link level2">过滤器</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/Filter-Interceptor-Listener.html#拦截器" class="router-link-active router-link-exact-active toc-link level2">拦截器</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/Filter-Interceptor-Listener.html#监听器" class="router-link-active router-link-exact-active toc-link level2">监听器</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/Filter-Interceptor-Listener.html#源码路径" class="router-link-active router-link-exact-active toc-link level2">源码路径：</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h2 id="前言" tabindex="-1"><a class="header-anchor" href="#前言" aria-hidden="true">#</a> 前言</h2><p>先说作用。</p><ul><li>过滤器（Filter）：当有一堆请求，只希望符合预期的请求进来。</li><li>拦截器（Interceptor）：想要干涉预期的请求。</li><li>监听器（Listener）：想要监听这些请求具体做了什么。</li></ul><p>再说区别。</p><p>过滤器是在请求进入容器后，但还没有进入 Servlet 之前进行预处理的。如下图所示。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/Filter-Interceptor-Listener-2a28621b-2cc1-4d29-87a1-cf6a01d95443.png" alt=""></p><p>拦截器是在请求进入控制器（Controller） 之前进行预处理的。</p><p>虚线内就是过滤器和拦截器的作用范围：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/Filter-Interceptor-Listener-dd48851b-c123-4fd8-b82d-9ae87b33745d.png" alt=""></p><p>过滤器依赖于 Servlet 容器，而拦截器依赖于 Spring 的 IoC 容器，因此可以通过注入的方式获取容器当中的对象。</p><p>监听器用于监听 Web 应用中某些对象的创建、销毁、增加、修改、删除等动作，然后做出相应的处理。</p><h2 id="过滤器" tabindex="-1"><a class="header-anchor" href="#过滤器" aria-hidden="true">#</a> 过滤器</h2><ul><li>过滤敏感词汇（防止sql注入）</li><li>设置字符编码</li><li>URL级别的权限访问控制</li><li>压缩响应信息</li></ul><p>过滤器的创建和销毁都由 Web 服务器负责，Web 应用程序启动的时候，创建过滤器对象，为后续的请求过滤做好准备。</p><p>过滤器可以有很多个，一个个过滤器组合起来就成了 FilterChain，也就是过滤器链。</p><p>在 Spring 中，过滤器都默认继承了 OncePerRequestFilter，顾名思义，OncePerRequestFilter 的作用就是确保一次请求只通过一次过滤器，而不重复执行。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/Filter-Interceptor-Listener-aaa1c537-c8ed-4c5d-b27f-93c1409f2748.png" alt=""></p><p>在编程喵实战项目中，我们就是通过继承 OncePerRequestFilter 来实现 JWT 登录授权过滤的。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">JwtAuthenticationTokenFilter</span> <span class="token keyword">extends</span> <span class="token class-name">OncePerRequestFilter</span> <span class="token punctuation">{</span>
 	<span class="token annotation punctuation">@Override</span>
     <span class="token keyword">protected</span> <span class="token keyword">void</span> <span class="token function">doFilterInternal</span><span class="token punctuation">(</span><span class="token class-name">HttpServletRequest</span> request<span class="token punctuation">,</span>
                                     <span class="token class-name">HttpServletResponse</span> response<span class="token punctuation">,</span>
@@ -95,7 +95,7 @@
         <span class="token class-name">Filter</span><span class="token punctuation">.</span><span class="token keyword">super</span><span class="token punctuation">.</span><span class="token function">destroy</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
     <span class="token punctuation">}</span>
 <span class="token punctuation">}</span>
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>@WebFilter 注解用于将一个类声明为过滤器，urlPatterns 属性用来指定过滤器的 URL 匹配模式，filterName 用来定义过滤器的名字。</p><p>MyFilter 过滤器的逻辑非常简单，重写了 Filter 的三个方法，在 doFilter 方法中加入了时间戳的记录。</p><p>然后我们在项目入口类上加上 @ServletComponentScan 注解，这样过滤器就会自动注册。</p><p>启动服务器，访问任意的 URL。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/Filter-Interceptor-Listener-c865b6d2-30d3-435b-a930-c732caed17ce.png" alt=""></p><h3 id="拦截器" tabindex="-1"><a class="header-anchor" href="#拦截器" aria-hidden="true">#</a> 拦截器</h3><ul><li>登录验证，判断用户是否登录</li><li>权限验证，判断用户是否有权限访问资源，如校验token</li><li>日志记录，记录请求操作日志（用户ip，访问时间等），以便统计请求访问量</li><li>处理cookie、本地化、国际化、主题等</li><li>性能监控，监控请求处理时长等</li></ul><p>我们来写一个简单的拦截器 LoggerInterceptor：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token annotation punctuation">@Slf4j</span>
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>@WebFilter 注解用于将一个类声明为过滤器，urlPatterns 属性用来指定过滤器的 URL 匹配模式，filterName 用来定义过滤器的名字。</p><p>MyFilter 过滤器的逻辑非常简单，重写了 Filter 的三个方法，在 doFilter 方法中加入了时间戳的记录。</p><p>然后我们在项目入口类上加上 @ServletComponentScan 注解，这样过滤器就会自动注册。</p><p>启动服务器，访问任意的 URL。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/Filter-Interceptor-Listener-c865b6d2-30d3-435b-a930-c732caed17ce.png" alt=""></p><h2 id="拦截器" tabindex="-1"><a class="header-anchor" href="#拦截器" aria-hidden="true">#</a> 拦截器</h2><ul><li>登录验证，判断用户是否登录</li><li>权限验证，判断用户是否有权限访问资源，如校验token</li><li>日志记录，记录请求操作日志（用户ip，访问时间等），以便统计请求访问量</li><li>处理cookie、本地化、国际化、主题等</li><li>性能监控，监控请求处理时长等</li></ul><p>我们来写一个简单的拦截器 LoggerInterceptor：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token annotation punctuation">@Slf4j</span>
 <span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">LoggerInterceptor</span> <span class="token keyword">implements</span> <span class="token class-name">HandlerInterceptor</span> <span class="token punctuation">{</span>
     <span class="token annotation punctuation">@Override</span>
     <span class="token keyword">public</span> <span class="token keyword">boolean</span> <span class="token function">preHandle</span><span class="token punctuation">(</span><span class="token class-name">HttpServletRequest</span> request<span class="token punctuation">,</span> <span class="token class-name">HttpServletResponse</span> response<span class="token punctuation">,</span> <span class="token class-name">Object</span> handler<span class="token punctuation">)</span> <span class="token keyword">throws</span> <span class="token class-name">Exception</span> <span class="token punctuation">{</span>
@@ -166,7 +166,7 @@
     <span class="token keyword">private</span> <span class="token class-name">Object</span> <span class="token function">getParameter</span><span class="token punctuation">(</span><span class="token class-name">Method</span> method<span class="token punctuation">,</span> <span class="token class-name">Object</span><span class="token punctuation">[</span><span class="token punctuation">]</span> args<span class="token punctuation">)</span> <span class="token punctuation">{</span>
     <span class="token punctuation">}</span>
 <span class="token punctuation">}</span>
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>通过拦截后的请求信息大概是这样的：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/Filter-Interceptor-Listener-7a4b219d-bd3e-435e-a2dc-93f4fe4e8cc2.png" alt=""></p><h3 id="监听器" tabindex="-1"><a class="header-anchor" href="#监听器" aria-hidden="true">#</a> 监听器</h3><p>根据监听对象可以把监听器分为 3 类：</p><hr><p>更多内容，只针对《Java 程序员进阶之路》星球用户开放，需要的小伙伴可以<a href="/springboot/docs/zhishixingqiu/" class="">戳链接🔗</a>加入我们的星球，一起学习，一起卷。。<strong>编程喵</strong>🐱是一个 Spring Boot+Vue 的前后端分离项目，融合了市面上绝大多数流行的技术要点。通过学习实战项目，你可以将所学的知识通过实践进行检验、你可以拓宽自己的技术边界，你可以掌握一个真正的实战项目是如何从 0 到 1 的。</p><hr><h3 id="源码路径" tabindex="-1"><a class="header-anchor" href="#源码路径" aria-hidden="true">#</a> 源码路径：</h3><blockquote><ul><li>编程喵：<a href="https://github.com/itwanger/coding-more" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/coding-more<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li>过滤器，拦截器、监听器专用：<a href="https://github.com/itwanger/codingmore-learning/tree/main/codingmore-filter-interceptor-listener" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/coding-more<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/springboot/Filter-Interceptor-Listener.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 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points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/22 上午12:06:08</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/springboot/transaction.html" class="nav-link prev" aria-label="开启事务支持"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->开启事务支持</div></a><a href="/redis/redis-springboot.html" class="nav-link next" aria-label="整合Redis实现缓存"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">整合Redis实现缓存<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div 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-    <script type="module" src="/assets/app.a0271b9c.js" defer></script>
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>通过拦截后的请求信息大概是这样的：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/Filter-Interceptor-Listener-7a4b219d-bd3e-435e-a2dc-93f4fe4e8cc2.png" alt=""></p><h2 id="监听器" tabindex="-1"><a class="header-anchor" href="#监听器" aria-hidden="true">#</a> 监听器</h2><p>根据监听对象可以把监听器分为 3 类：</p><hr><p>更多内容，只针对《Java 程序员进阶之路》星球用户开放，需要的小伙伴可以<a href="https://tobebetterjavaer.com/zhishixingqiu/" target="_blank" rel="noopener noreferrer">戳链接🔗<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>加入我们的星球，一起学习，一起卷。。<strong>编程喵</strong>🐱是一个 Spring Boot+Vue 的前后端分离项目，融合了市面上绝大多数流行的技术要点。通过学习实战项目，你可以将所学的知识通过实践进行检验、你可以拓宽自己的技术边界，你可以掌握一个真正的实战项目是如何从 0 到 1 的。</p><hr><h2 id="源码路径" tabindex="-1"><a class="header-anchor" href="#源码路径" aria-hidden="true">#</a> 源码路径：</h2><blockquote><ul><li>编程喵：<a href="https://github.com/itwanger/coding-more" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/coding-more<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li>过滤器，拦截器、监听器专用：<a href="https://github.com/itwanger/codingmore-learning/tree/main/codingmore-filter-interceptor-listener" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/coding-more<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/springboot/Filter-Interceptor-Listener.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/6/10 下午7:28:25</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/springboot/transaction.html" class="nav-link prev" aria-label="开启事务支持"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->开启事务支持</div></a><a href="/redis/redis-springboot.html" class="nav-link next" aria-label="整合Redis实现缓存"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">整合Redis实现缓存<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
+    <script type="module" src="/assets/app.615e41d8.js" defer></script>
   </body>
 </html>
diff --git a/dist/springboot/aop-log.html b/dist/springboot/aop-log.html
index f22f9254..592431bb 100644
--- a/dist/springboot/aop-log.html
+++ b/dist/springboot/aop-log.html
@@ -39,10 +39,10 @@
       }
     </script>
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id="spring-aop-扫盲" tabindex="-1"><a class="header-anchor" href="#spring-aop-扫盲" aria-hidden="true">#</a> Spring AOP 扫盲</h1><p>AOP 是 Spring 体系中非常重要的两个概念之一（另外一个是 IoC），今天这篇文章就来带大家通过实战的方式，在编程猫 SpringBoot 项目中使用 AOP 技术为 controller 层添加一个切面来实现接口访问的统一日志记录。</p><h3 id="一、关于-aop" tabindex="-1"><a class="header-anchor" href="#一、关于-aop" aria-hidden="true">#</a> 一、关于 AOP</h3><p>AOP，也就是 Aspect-oriented Programming，译为面向切面编程，是计算机科学中的一个设计思想，旨在通过切面技术为业务主体增加额外的通知（Advice），从而对声明为“切点”（Pointcut）的代码块进行统一管理和装饰。</p><p>这种思想非常适用于，将那些与核心业务不那么密切关联的功能添加到程序中，就好比我们今天的主题——日志功能，就是一个典型的案例。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/aop-log-1.png" alt=""></p><p>AOP 是对面向对象编程（Object-oriented Programming，俗称 OOP）的一种补充，OOP 的核心单元是类（class），而 AOP 的核心单元是切面（Aspect）。利用 AOP 可以对业务逻辑的各个部分进行隔离，从而降低耦合度，提高程序的可重用性，同时也提高了开发效率。</p><p>我们可以简单的把 AOP 理解为贯穿于方法之中，在方法执行前、执行时、执行后、返回值后、异常后要执行的操作。</p><h3 id="二、aop-的相关术语" tabindex="-1"><a class="header-anchor" href="#二、aop-的相关术语" aria-hidden="true">#</a> 二、AOP 的相关术语</h3><p>来看下面这幅图，这是一个 AOP 的模型图，就是在某些方法执行前后执行一些通用的操作，并且这些操作不会影响程序本身的运行。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/aop-log-2.png" alt=""> 我们了解下 AOP 涉及到的 5 个关键术语：</p><p><strong>1）横切关注点</strong>，从每个方法中抽取出来的同一类非核心业务</p><p><strong>2）切面（Aspect）</strong>，对横切关注点进行封装的类，每个关注点体现为一个通知方法；通常使用 @Aspect 注解来定义切面。</p><p><strong>3）通知（Advice）</strong>，切面必须要完成的各个具体工作，比如我们的日志切面需要记录接口调用前后的时长，就需要在调用接口前后记录时间，再取差值。通知的方式有五种：</p><ul><li>@Before：通知方法会在目标方法调用之前执行</li><li>@After：通知方法会在目标方法调用后执行</li><li>@AfterReturning：通知方法会在目标方法返回后执行</li><li>@AfterThrowing：通知方法会在目标方法抛出异常后执行</li><li>@Around：把整个目标方法包裹起来，在被调用前和调用之后分别执行通知方法</li></ul><p><strong>4）连接点（JoinPoint）</strong>，通知应用的时机，比如接口方法被调用时就是日志切面的连接点。</p><p><strong>5）切点（Pointcut）</strong>，通知功能被应用的范围，比如本篇日志切面的应用范围是所有 controller 的接口。通常使用 @Pointcut 注解来定义切点表达式。</p><p>切入点表达式的语法格式规范如下所示：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>execution(modifiers-pattern? ret-type-pattern declaring-type-pattern?
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class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Spring AOP 扫盲</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年2月22日</span><meta property="datePublished" content="2022-02-22T01:27:54.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category5" role>Java企业级开发</li><meta property="articleSection" content="Java企业级开发"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag1" role>Spring</li></ul><meta property="keywords" content="Spring"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 5 分钟</span><meta property="timeRequired" content="PT5M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/aop-log.html#一、关于-aop" class="router-link-active router-link-exact-active toc-link level3">一、关于 AOP</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/aop-log.html#二、aop-的相关术语" class="router-link-active router-link-exact-active toc-link level3">二、AOP 的相关术语</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/aop-log.html#三、实操-aop-记录接口访问日志" class="router-link-active router-link-exact-active toc-link level3">三、实操 AOP 记录接口访问日志</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="spring-aop-扫盲" tabindex="-1"><a class="header-anchor" href="#spring-aop-扫盲" aria-hidden="true">#</a> Spring AOP 扫盲</h1><p>AOP 是 Spring 体系中非常重要的两个概念之一（另外一个是 IoC），今天这篇文章就来带大家通过实战的方式，在编程猫 SpringBoot 项目中使用 AOP 技术为 controller 层添加一个切面来实现接口访问的统一日志记录。</p><h3 id="一、关于-aop" tabindex="-1"><a class="header-anchor" href="#一、关于-aop" aria-hidden="true">#</a> 一、关于 AOP</h3><p>AOP，也就是 Aspect-oriented Programming，译为面向切面编程，是计算机科学中的一个设计思想，旨在通过切面技术为业务主体增加额外的通知（Advice），从而对声明为“切点”（Pointcut）的代码块进行统一管理和装饰。</p><p>这种思想非常适用于，将那些与核心业务不那么密切关联的功能添加到程序中，就好比我们今天的主题——日志功能，就是一个典型的案例。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/aop-log-1.png" alt=""></p><p>AOP 是对面向对象编程（Object-oriented Programming，俗称 OOP）的一种补充，OOP 的核心单元是类（class），而 AOP 的核心单元是切面（Aspect）。利用 AOP 可以对业务逻辑的各个部分进行隔离，从而降低耦合度，提高程序的可重用性，同时也提高了开发效率。</p><p>我们可以简单的把 AOP 理解为贯穿于方法之中，在方法执行前、执行时、执行后、返回值后、异常后要执行的操作。</p><h3 id="二、aop-的相关术语" tabindex="-1"><a class="header-anchor" href="#二、aop-的相关术语" aria-hidden="true">#</a> 二、AOP 的相关术语</h3><p>来看下面这幅图，这是一个 AOP 的模型图，就是在某些方法执行前后执行一些通用的操作，并且这些操作不会影响程序本身的运行。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/aop-log-2.png" alt=""> 我们了解下 AOP 涉及到的 5 个关键术语：</p><p><strong>1）横切关注点</strong>，从每个方法中抽取出来的同一类非核心业务</p><p><strong>2）切面（Aspect）</strong>，对横切关注点进行封装的类，每个关注点体现为一个通知方法；通常使用 @Aspect 注解来定义切面。</p><p><strong>3）通知（Advice）</strong>，切面必须要完成的各个具体工作，比如我们的日志切面需要记录接口调用前后的时长，就需要在调用接口前后记录时间，再取差值。通知的方式有五种：</p><ul><li>@Before：通知方法会在目标方法调用之前执行</li><li>@After：通知方法会在目标方法调用后执行</li><li>@AfterReturning：通知方法会在目标方法返回后执行</li><li>@AfterThrowing：通知方法会在目标方法抛出异常后执行</li><li>@Around：把整个目标方法包裹起来，在被调用前和调用之后分别执行通知方法</li></ul><p><strong>4）连接点（JoinPoint）</strong>，通知应用的时机，比如接口方法被调用时就是日志切面的连接点。</p><p><strong>5）切点（Pointcut）</strong>，通知功能被应用的范围，比如本篇日志切面的应用范围是所有 controller 的接口。通常使用 @Pointcut 注解来定义切点表达式。</p><p>切入点表达式的语法格式规范如下所示：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>execution(modifiers-pattern? ret-type-pattern declaring-type-pattern?
 				name-pattern(param-pattern)
                 throws-pattern?)
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><ul><li><code>modifiers-pattern?</code> 为访问权限修饰符</li><li><code>ret-type-pattern</code> 为返回类型，通常用 <code>*</code> 来表示任意返回类型</li><li><code>declaring-type-pattern?</code> 为包名</li><li><code>name-pattern</code> 为方法名，可以使用 <code>*</code> 来表示所有，或者 <code>set*</code> 来表示所有以 set 开头的类名</li><li><code>param-pattern)</code> 为参数类型，多个参数可以用 <code>,</code> 隔开，各个参与也可以使用 <code>*</code> 来表示所有类型的参数，还可以使用 <code>(..)</code> 表示零个或者任意参数</li><li><code>throws-pattern?</code> 为异常类型</li><li><code>?</code> 表示前面的为可选项</li></ul><p>举个例子：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token annotation punctuation">@Pointcut</span><span class="token punctuation">(</span><span class="token string">&quot;execution(public * com.codingmore.controller.*.*(..))&quot;</span><span class="token punctuation">)</span>
@@ -118,6 +118,6 @@
     <span class="token punctuation">}</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>第四步，运行项目，并对 controller 下的某个控制器进行测试。</p><blockquote><p>Swagger knife4j 访问地址：http://localhost:9022/doc.html</p></blockquote><p>执行登录用户查询操作：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/aop-log-3.png" alt=""></p><p>可以在控制台可以看到以下日志信息：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/aop-log-4.png" alt=""> 源码地址：</p><blockquote><p><a href="https://github.com/itwanger/coding-more" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/coding-more<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>参考链接：</p><blockquote><p>作者 cxuan：https://www.cnblogs.com/cxuanBlog/p/13060510.html<br> 灰小猿：https://bbs.huaweicloud.com/blogs/289045<br> 山高我为峰：https://www.cnblogs.com/liaojie970/p/7883687.html<br> macrozheng：https://github.com/macrozheng/mall</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/springboot/aop-log.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/12 下午4:24:21</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: 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class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/cors.html#前后端分离项目-如何解决跨域问题" class="router-link-active router-link-exact-active toc-link level2">前后端分离项目，如何解决跨域问题？</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/cors.html#一、关于跨域" class="router-link-active router-link-exact-active toc-link level3">一、关于跨域</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/cors.html#二、nodejs-代理" class="router-link-active router-link-exact-active toc-link level3">二、Nodejs 代理</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/cors.html#三、开启跨域资源共享" class="router-link-active router-link-exact-active toc-link level3">三、开启跨域资源共享</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/cors.html#四、源码路径" class="router-link-active router-link-exact-active toc-link level3">四、源码路径</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h2 id="前后端分离项目-如何解决跨域问题" tabindex="-1"><a class="header-anchor" href="#前后端分离项目-如何解决跨域问题" aria-hidden="true">#</a> 前后端分离项目，如何解决跨域问题？</h2><p>跨域问题是前后端分离项目中非常常见的一个问题，举例来说，编程猫（<a href="https://github.com/itwanger/coding-more" target="_blank" rel="noopener noreferrer">codingmore<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>）学习网站的前端服务跑在 8080 端口下，后端服务跑在 9002 端口下，那么前端在请求后端接口的时候就会出现跨域问题。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/cors-1.png" alt=""></p><p>403 Forbidden 是HTTP协议中的一个状态码（Status Code），意味着后端服务虽然成功解析了请求，但前端却没有访问该资源的权限。</p><p>那怎么解决这个问题呢？通常有两个思路：</p><ul><li>前端使用 Nodejs 代理（开发环境下，生产环境下可以用 Nginx 替代）</li><li>或者后端开启跨域资源共享</li></ul><h3 id="一、关于跨域" tabindex="-1"><a class="header-anchor" href="#一、关于跨域" aria-hidden="true">#</a> 一、关于跨域</h3><p>跨域对于前后端开发者来说，就像一块狗皮膏药，无论是面试还是开发中，都会经常遇到。</p><p>之所以出现跨域问题，是因为<a href="https://developer.mozilla.org/zh-CN/docs/Web/Security/Same-origin_policy" target="_blank" rel="noopener noreferrer">浏览器的同源策略<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，为了隔离潜在的恶意文件，为了防御来自歪门邪道的攻击，浏览器限制了从同一个源加载的文档或脚本与来自另一个源的资源进行交互。</p><p>前面我们提到了，前端跑在 8080 端口下，后端跑在 9002 端口下，这种情况就属于不同的源（域名不同，协议不同，端口不同），所以 8080 端口下的前端请求直接访问 9002 端口下的后端接口时就访问失败了。</p><p>那正确的打开方式是什么呢？我们前面也提到了，前端使用 Nodejs 代理或者后端开启跨域资源共享，我们一一来实践下。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/cors-2.gif" alt=""></p><h3 id="二、nodejs-代理" tabindex="-1"><a class="header-anchor" href="#二、nodejs-代理" aria-hidden="true">#</a> 二、Nodejs 代理</h3><p>在 Nodejs 出现之前，JavaScript 编写的程序通常需要在用户的浏览器上执行，Node.js 出现后，JavaScript 也能用于服务端编程了。Nodejs 一系列的内置模块使得程序可以脱离 IIS、Apache 这种 Web 服务作为独立的服务器执行。</p><p>我们使用 Nodejs 来解决跨域问题的思路就是，在本地创建一个虚拟服务器，对 8080 端口下的前端请求进行代理，同时接收 9002 端口下的服务器端响应，这样服务端和服务端进行数据的交互就不会出现跨域问题了。</p><p>第一步，配置 Nodejs 代理服务</p><div class="language-text ext-text line-numbers-mode"><pre 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class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/cors.html#一、关于跨域" class="router-link-active router-link-exact-active toc-link level3">一、关于跨域</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/cors.html#二、nodejs-代理" class="router-link-active router-link-exact-active toc-link level3">二、Nodejs 代理</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/cors.html#三、开启跨域资源共享" class="router-link-active router-link-exact-active toc-link level3">三、开启跨域资源共享</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/cors.html#四、源码路径" class="router-link-active router-link-exact-active toc-link level3">四、源码路径</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h2 id="前后端分离项目-如何解决跨域问题" tabindex="-1"><a class="header-anchor" href="#前后端分离项目-如何解决跨域问题" aria-hidden="true">#</a> 前后端分离项目，如何解决跨域问题？</h2><p>跨域问题是前后端分离项目中非常常见的一个问题，举例来说，编程猫（<a href="https://github.com/itwanger/coding-more" target="_blank" rel="noopener noreferrer">codingmore<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>）学习网站的前端服务跑在 8080 端口下，后端服务跑在 9002 端口下，那么前端在请求后端接口的时候就会出现跨域问题。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/cors-1.png" alt=""></p><p>403 Forbidden 是HTTP协议中的一个状态码（Status Code），意味着后端服务虽然成功解析了请求，但前端却没有访问该资源的权限。</p><p>那怎么解决这个问题呢？通常有两个思路：</p><ul><li>前端使用 Nodejs 代理（开发环境下，生产环境下可以用 Nginx 替代）</li><li>或者后端开启跨域资源共享</li></ul><h3 id="一、关于跨域" tabindex="-1"><a class="header-anchor" href="#一、关于跨域" aria-hidden="true">#</a> 一、关于跨域</h3><p>跨域对于前后端开发者来说，就像一块狗皮膏药，无论是面试还是开发中，都会经常遇到。</p><p>之所以出现跨域问题，是因为<a href="https://developer.mozilla.org/zh-CN/docs/Web/Security/Same-origin_policy" target="_blank" rel="noopener noreferrer">浏览器的同源策略<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，为了隔离潜在的恶意文件，为了防御来自歪门邪道的攻击，浏览器限制了从同一个源加载的文档或脚本与来自另一个源的资源进行交互。</p><p>前面我们提到了，前端跑在 8080 端口下，后端跑在 9002 端口下，这种情况就属于不同的源（域名不同，协议不同，端口不同），所以 8080 端口下的前端请求直接访问 9002 端口下的后端接口时就访问失败了。</p><p>那正确的打开方式是什么呢？我们前面也提到了，前端使用 Nodejs 代理或者后端开启跨域资源共享，我们一一来实践下。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/cors-2.gif" alt=""></p><h3 id="二、nodejs-代理" tabindex="-1"><a class="header-anchor" href="#二、nodejs-代理" aria-hidden="true">#</a> 二、Nodejs 代理</h3><p>在 Nodejs 出现之前，JavaScript 编写的程序通常需要在用户的浏览器上执行，Node.js 出现后，JavaScript 也能用于服务端编程了。Nodejs 一系列的内置模块使得程序可以脱离 IIS、Apache 这种 Web 服务作为独立的服务器执行。</p><p>我们使用 Nodejs 来解决跨域问题的思路就是，在本地创建一个虚拟服务器，对 8080 端口下的前端请求进行代理，同时接收 9002 端口下的服务器端响应，这样服务端和服务端进行数据的交互就不会出现跨域问题了。</p><p>第一步，配置 Nodejs 代理服务</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>module.exports = {
   dev: {
     // Paths
     assetsSubDirectory: &#39;static&#39;,
@@ -95,6 +95,6 @@ config<span class="token punctuation">.</span><span class="token function">addAl
     <span class="token punctuation">}</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>再次重启后端服务，重新访问文章列表接口，发现有响应数据了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/cors-8.png" alt=""></p><p>非简单请求必须首先使用 OPTIONS 请求方法发起一个预检请求到服务器端，以获知服务器是否允许该实际请求。&quot;预检请求“的使用，避免了跨域请求对服务器的用户数据造成未预期的影响。</p><p>我们来通过两张图片简单总结一下预检请求的整个过程，第一张，发起 OPTIONS 预检请求：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/cors-9.png" alt=""></p><p>第二章，发起正式请求：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/cors-10.png" alt=""></p><h3 id="四、源码路径" tabindex="-1"><a class="header-anchor" href="#四、源码路径" aria-hidden="true">#</a> 四、源码路径</h3><p>编程猫后端源码：</p><blockquote><p>https://github.com/itwanger/coding-more</p></blockquote><p>编程猫后台管理的前端源码：</p><blockquote><p>https://github.com/itwanger/codingmore-admin-web</p></blockquote><p>参考链接：</p><blockquote><p>跨域：https://segmentfault.com/a/1190000015597029 CORS：https://developer.mozilla.org/zh-CN/docs/Web/HTTP/CORS 阮一峰：https://www.ruanyifeng.com/blog/2016/04/cors.html 简单请求+预检请求：https://github.com/amandakelake/blog/issues/62</p></blockquote><hr><p><strong>本篇已收录至 GitHub 上星标 1.6k+ star 的开源专栏《Java 程序员进阶之路》，据说每一个优秀的 Java 程序员都喜欢她，风趣幽默、通俗易懂。内容包括 Java 基础、Java 并发编程、Java 虚拟机、Java 企业级开发、Java 面试等核心知识点。学 Java，就认准 Java 程序员进阶之路</strong>😄。</p><p><a href="https://github.com/itwanger/toBeBetterJavaer" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/toBeBetterJavaer<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" 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class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/springboot/initializr.html#源码路径" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="源码路径"><!---->源码路径<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/springboot/mysql-druid.html" class="nav-link sidebar-link sidebar-page" aria-label="整合MySQL和Druid"><!---->整合MySQL和Druid<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/springboot/jpa.html" class="nav-link sidebar-link sidebar-page" aria-label="整合JPA"><!---->整合JPA<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/springboot/thymeleaf.html" class="nav-link sidebar-link sidebar-page" aria-label="整合Thymeleaf"><!---->整合Thymeleaf<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/springboot/transaction.html" class="nav-link sidebar-link sidebar-page" aria-label="开启事务支持"><!---->开启事务支持<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/springboot/Filter-Interceptor-Listener.html" class="nav-link sidebar-link sidebar-page" aria-label="过滤器、拦截器、监听器"><!---->过滤器、拦截器、监听器<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/redis/redis-springboot.html" class="nav-link sidebar-link sidebar-page" aria-label="整合Redis实现缓存"><!---->整合Redis实现缓存<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/springboot/logback.html" class="nav-link sidebar-link sidebar-page" aria-label="整合Logback"><!---->整合Logback<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/springboot/swagger.html" class="nav-link sidebar-link sidebar-page" aria-label="整合Swagger-UI"><!---->整合Swagger-UI<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/gongju/knife4j.html" class="nav-link sidebar-link sidebar-page" aria-label="整合Knife4j"><!---->整合Knife4j<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/springboot/springtask.html" class="nav-link sidebar-link sidebar-page" aria-label="整合SpringTask"><!---->整合SpringTask<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/kaiyuan/auto-generator.html" class="nav-link sidebar-link sidebar-page" aria-label="整合MyBatis-Plus AutoGenerator"><!---->整合MyBatis-Plus AutoGenerator<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/springboot/macos-codingmore-run.html" class="nav-link sidebar-link sidebar-page" aria-label="macOS下如何运行编程喵源码"><!---->macOS下如何运行编程喵源码<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/springboot/windows-codingmore-run.html" class="nav-link sidebar-link sidebar-page" aria-label="Windows下如何运行编程喵源码"><!---->Windows下如何运行编程喵源码<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.5 辅助工具</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.6 开源轮子</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.7 分布式</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.8 消息队列</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->搭建第一个Spring Boot项目</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 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0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category5" role>Java企业级开发</li><meta property="articleSection" content="Java企业级开发"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag1" role>Spring Boot</li></ul><meta property="keywords" content="Spring Boot"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 6 分钟</span><meta property="timeRequired" content="PT6M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/initializr.html#关于-spring-initializr" class="router-link-active router-link-exact-active toc-link level3">关于 Spring Initializr</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/initializr.html#spring-boot-项目结构分析" class="router-link-active router-link-exact-active toc-link level3">Spring Boot 项目结构分析</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/initializr.html#如何启动-部署-spring-boot-项目" class="router-link-active router-link-exact-active toc-link level3">如何启动/部署 Spring Boot 项目</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/initializr.html#第一个web项目" class="router-link-active router-link-exact-active toc-link level3">第一个Web项目</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/initializr.html#热部署" class="router-link-active router-link-exact-active toc-link level3">热部署</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/initializr.html#源码路径" class="router-link-active router-link-exact-active toc-link level3">源码路径</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h3 id="关于-spring-initializr" tabindex="-1"><a class="header-anchor" href="#关于-spring-initializr" aria-hidden="true">#</a> 关于 Spring Initializr</h3><p>Spring 官方提供了 Spring Initializr 的方式来创建 Spring Boot 项目。网址如下：</p><blockquote><p><a href="https://start.spring.io/" target="_blank" rel="noopener noreferrer">https://start.spring.io/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>打开后的界面如下：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/initializr-01.png" alt=""></p><p>可以将 Spring Initializr 看作是 Spring Boot 项目的初始化向导，它可以帮助开发人员在一分钟之内创建一个 Spring Boot 骨架，非常的傻瓜式。</p><p>来解释一下 Spring Initializr 初始化界面中的关键选项。</p><p>1）Project：项目的构建方式，可以选择 <a href="https://tobebetterjavaer.com/maven/maven.html" target="_blank" rel="noopener noreferrer">Maven<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>（安装方式可以戳链接） 和 Gradle（构建脚本基于 Groovy 或者 Kotlin 等语言来编写，而不是传统的 XML）。编程喵默认采用的 Maven。</p><p>2）Language：项目的开发语言，可以选择 Java、Kotlin（JetBrains开发的可以在 JVM 上运行的编程语言）、Groovy（可以作为 Java 平台的脚本语言来使用）。默认 Java 即可。</p><p>3）Spring Boot：项目使用的 Spring Boot 版本。默认版本即可，比较稳定。</p><p>4）Project Metada：项目的基础设置，包括包名、打包方式、JDK 版本等。</p><ul><li>Group：项目所属组织的标识符，比如说 top.codingmore；</li><li>Artifact：项目的标识符，比如说 coding-more；</li><li>Name：默认保持和 Artifact 一致即可；</li><li>Description： 项目的描述信息，比如说《编程喵实战项目（Spring Boot+Vue 前后端分离项目）》；</li><li>Package name：项目包名，根据Group和Artifact自动生成即可。</li><li>Packaging： 项目打包方式，可以选择 Jar 和 War（SSM 时代，JavaWeb 项目通常会打成 War 包，放在 Tomcat 下），Spring Boot 时代默认 Jar 包即可，因为 Spring Boot 可以内置 Tomcat、Jetty、Undertow 等服务容器了。</li><li>Java：项目选用的 JDK 版本，选择 11 或者 8 就行（编程喵采用的是最最最最稳定的 Java8）。</li></ul><p>5）Dependencies：项目所需要的依赖和 starter。如果不选择的话，默认只有核心模块 spring-boot-starter 和测试模块 spring-boot-starter-test。</p><p>好，接下来我们使用 Spring Initializr 初始化一个 Web 项目，Project 选择 Maven，Spring Boot 选择 2.6.1，Java 选择 JDK 8，Dependencies 选择「Build web, including RESTful, applications using Spring MVC. Uses Apache Tomcat as the default embedded container.」</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/initializr-02.png" alt=""></p><p>这预示着我们会采用 SpringMVC 并且使用 Tomcat 作为默认服务器来开发一个 Web 项目。</p><p>然后点击底部的「generate」按钮，就会生成一个 Spring Boot 初始化项目的压缩包。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/initializr-03.png" alt=""></p><p>如果使用的是 Intellij IDEA 旗舰版，可以直接通过 Intellij IDEA 新建 Spring Boot 项目。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/initializr-2d03d0a4-0e87-4cd3-974d-f35bc440bdf0.png" alt=""></p><h3 id="spring-boot-项目结构分析" tabindex="-1"><a class="header-anchor" href="#spring-boot-项目结构分析" aria-hidden="true">#</a> Spring Boot 项目结构分析</h3><p>解开压缩包，并导入到 Intellij IDEA 中，可以看到 Spring Boot 项目的目录结构。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/initializr-04.png" alt=""></p><p>可以使用 <code>tree -CfL 3</code> 命令以树状图列出目录的内容：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/initializr-05.png" alt=""></p><ul><li>src/main/java 为项目的开发目录，业务代码在这里写。</li><li>src/main/resources 为配置文件目录，静态文件、模板文件和配置文件都放在这里。 <ul><li>子目录 static 用于存放静态资源文件，比如说 JS、CSS 图片等。</li><li>子目录 templates 用于存放模板文件，比如说 thymeleaf 和 freemarker 文件。</li></ul></li><li>src/test/java 为测试类文件目录。</li><li>pom.xml 用来管理项目的依赖和构建。</li></ul><h3 id="如何启动-部署-spring-boot-项目" tabindex="-1"><a class="header-anchor" href="#如何启动-部署-spring-boot-项目" aria-hidden="true">#</a> 如何启动/部署 Spring Boot 项目</h3><p>第一次启动，我个人习惯在 main 类中右键，在弹出的右键菜单这种选择「run ... main()」启动。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/initializr-06.png" alt=""></p><p>经过 2.5s 左右的 build 后，项目启动成功了，可以在日志中看到 Web 项目是以 Tomcat 为容器的，默认端口号为 8080，根路径为空。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/initializr-07.png" alt=""></p><p>这要比传统的 Web 项目省事省心省力，不需要打成 war 包，不需要把 war 包放到 Tomcat 的 webapp 目录下再启动。</p><p>那如果想把项目打成 jar 包放到服务器上，以 <code>java -jar xxx.jar</code> 形式运行的话，该怎么做呢？</p><p>打开 Terminal 终端， 执行命令 <code>mvn clean package</code>，等待打包结果。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/initializr-08.png" alt=""></p><p>我们的项目在初始化的时候选择的是 Maven 构建方式，所以 pom.xml 文件中会引入 spring-boot-maven-plugin 插件。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;build&gt;
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开源轮子</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.7 分布式</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.8 消息队列</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->搭建第一个Spring Boot项目</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 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aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 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class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 6 分钟</span><meta property="timeRequired" content="PT6M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/initializr.html#关于-spring-initializr" class="router-link-active router-link-exact-active toc-link level2">关于 Spring Initializr</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/initializr.html#spring-boot-项目结构分析" class="router-link-active router-link-exact-active toc-link level2">Spring Boot 项目结构分析</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/initializr.html#如何启动-部署-spring-boot-项目" class="router-link-active router-link-exact-active toc-link level2">如何启动/部署 Spring Boot 项目</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/initializr.html#第一个web项目" class="router-link-active router-link-exact-active toc-link level2">第一个Web项目</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/initializr.html#热部署" class="router-link-active router-link-exact-active toc-link level2">热部署</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/initializr.html#源码路径" class="router-link-active router-link-exact-active toc-link level3">源码路径</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h2 id="关于-spring-initializr" tabindex="-1"><a class="header-anchor" href="#关于-spring-initializr" aria-hidden="true">#</a> 关于 Spring Initializr</h2><p>Spring 官方提供了 Spring Initializr 的方式来创建 Spring Boot 项目。网址如下：</p><blockquote><p><a href="https://start.spring.io/" target="_blank" rel="noopener noreferrer">https://start.spring.io/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>打开后的界面如下：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/initializr-01.png" alt=""></p><p>可以将 Spring Initializr 看作是 Spring Boot 项目的初始化向导，它可以帮助开发人员在一分钟之内创建一个 Spring Boot 骨架，非常的傻瓜式。</p><p>来解释一下 Spring Initializr 初始化界面中的关键选项。</p><p>1）Project：项目的构建方式，可以选择 <a href="https://tobebetterjavaer.com/maven/maven.html" target="_blank" rel="noopener noreferrer">Maven<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>（安装方式可以戳链接） 和 Gradle（构建脚本基于 Groovy 或者 Kotlin 等语言来编写，而不是传统的 XML）。编程喵默认采用的 Maven。</p><p>2）Language：项目的开发语言，可以选择 Java、Kotlin（JetBrains开发的可以在 JVM 上运行的编程语言）、Groovy（可以作为 Java 平台的脚本语言来使用）。默认 Java 即可。</p><p>3）Spring Boot：项目使用的 Spring Boot 版本。默认版本即可，比较稳定。</p><p>4）Project Metada：项目的基础设置，包括包名、打包方式、JDK 版本等。</p><ul><li>Group：项目所属组织的标识符，比如说 top.codingmore；</li><li>Artifact：项目的标识符，比如说 coding-more；</li><li>Name：默认保持和 Artifact 一致即可；</li><li>Description： 项目的描述信息，比如说《编程喵实战项目（Spring Boot+Vue 前后端分离项目）》；</li><li>Package name：项目包名，根据Group和Artifact自动生成即可。</li><li>Packaging： 项目打包方式，可以选择 Jar 和 War（SSM 时代，JavaWeb 项目通常会打成 War 包，放在 Tomcat 下），Spring Boot 时代默认 Jar 包即可，因为 Spring Boot 可以内置 Tomcat、Jetty、Undertow 等服务容器了。</li><li>Java：项目选用的 JDK 版本，选择 11 或者 8 就行（编程喵采用的是最最最最稳定的 Java8）。</li></ul><p>5）Dependencies：项目所需要的依赖和 starter。如果不选择的话，默认只有核心模块 spring-boot-starter 和测试模块 spring-boot-starter-test。</p><p>好，接下来我们使用 Spring Initializr 初始化一个 Web 项目，Project 选择 Maven，Spring Boot 选择 2.6.1，Java 选择 JDK 8，Dependencies 选择「Build web, including RESTful, applications using Spring MVC. Uses Apache Tomcat as the default embedded container.」</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/initializr-02.png" alt=""></p><p>这预示着我们会采用 SpringMVC 并且使用 Tomcat 作为默认服务器来开发一个 Web 项目。</p><p>然后点击底部的「generate」按钮，就会生成一个 Spring Boot 初始化项目的压缩包。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/initializr-03.png" alt=""></p><p>如果使用的是 Intellij IDEA 旗舰版，可以直接通过 Intellij IDEA 新建 Spring Boot 项目。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/initializr-2d03d0a4-0e87-4cd3-974d-f35bc440bdf0.png" alt=""></p><h2 id="spring-boot-项目结构分析" tabindex="-1"><a class="header-anchor" href="#spring-boot-项目结构分析" aria-hidden="true">#</a> Spring Boot 项目结构分析</h2><p>解开压缩包，并导入到 Intellij IDEA 中，可以看到 Spring Boot 项目的目录结构。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/initializr-04.png" alt=""></p><p>可以使用 <code>tree -CfL 3</code> 命令以树状图列出目录的内容：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/initializr-05.png" alt=""></p><ul><li>src/main/java 为项目的开发目录，业务代码在这里写。</li><li>src/main/resources 为配置文件目录，静态文件、模板文件和配置文件都放在这里。 <ul><li>子目录 static 用于存放静态资源文件，比如说 JS、CSS 图片等。</li><li>子目录 templates 用于存放模板文件，比如说 thymeleaf 和 freemarker 文件。</li></ul></li><li>src/test/java 为测试类文件目录。</li><li>pom.xml 用来管理项目的依赖和构建。</li></ul><h2 id="如何启动-部署-spring-boot-项目" tabindex="-1"><a class="header-anchor" href="#如何启动-部署-spring-boot-项目" aria-hidden="true">#</a> 如何启动/部署 Spring Boot 项目</h2><p>第一次启动，我个人习惯在 main 类中右键，在弹出的右键菜单这种选择「run ... main()」启动。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/initializr-06.png" alt=""></p><p>经过 2.5s 左右的 build 后，项目启动成功了，可以在日志中看到 Web 项目是以 Tomcat 为容器的，默认端口号为 8080，根路径为空。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/initializr-07.png" alt=""></p><p>这要比传统的 Web 项目省事省心省力，不需要打成 war 包，不需要把 war 包放到 Tomcat 的 webapp 目录下再启动。</p><p>那如果想把项目打成 jar 包放到服务器上，以 <code>java -jar xxx.jar</code> 形式运行的话，该怎么做呢？</p><p>打开 Terminal 终端， 执行命令 <code>mvn clean package</code>，等待打包结果。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/initializr-08.png" alt=""></p><p>我们的项目在初始化的时候选择的是 Maven 构建方式，所以 pom.xml 文件中会引入 spring-boot-maven-plugin 插件。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;build&gt;
   &lt;plugins&gt;
     &lt;plugin&gt;
       &lt;groupId&gt;org.springframework.boot&lt;/groupId&gt;
@@ -50,7 +50,7 @@
     &lt;/plugin&gt;
   &lt;/plugins&gt;
 &lt;/build&gt;
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>因此我们就可以利用 Maven 命令来完成项目打包，打包完成后，进入 target 目录下，就可以看到打包好的 jar 包了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/initializr-09.png" alt=""></p><p>利用终端工具 <a href="https://mp.weixin.qq.com/s/HeUAPe4LqqjfzIeWDe8KIg" target="_blank" rel="noopener noreferrer">Tabby<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，将 jar 包上传到服务器。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/initializr-10.png" alt=""></p><p>执行 <code>java -jar tobebetterjavaer-0.0.1-SNAPSHOT.jar</code> 命令。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/initializr-11.png" alt=""></p><p>what？？？？？？竟然没有安装 JDK。好吧，为了带白票阿里云服务器的小伙伴一起学习 Linux，我下了血本自己买了一台零添加的服务器。</p><p>PS：需要在 centos 环境下安装 JDK 的小伙伴可以看这篇。</p><blockquote><p><a href="https://segmentfault.com/a/1190000015389941" target="_blank" rel="noopener noreferrer">https://segmentfault.com/a/1190000015389941<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>安装好 JDK 后，再次执行命令就可以看到 Spring Boot 项目可以正常在服务器上跑起来了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/initializr-12.png" alt=""></p><h3 id="第一个web项目" tabindex="-1"><a class="header-anchor" href="#第一个web项目" aria-hidden="true">#</a> 第一个Web项目</h3><p>项目既然启动成功了，我们在浏览器里访问 8080 端口测试下吧。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/initializr-13.png" alt=""></p><p>咦，竟然 Whitelabel 了，这个 404 页面是 Spring Boot 默认的错误页面，表示我们的请求在 Web 服务中不存在。</p><p>那该怎么办呢？</p><p>我们来增加一个 Controller 文件，用来处理 Web 请求，内容如下。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>@Controller
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>因此我们就可以利用 Maven 命令来完成项目打包，打包完成后，进入 target 目录下，就可以看到打包好的 jar 包了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/initializr-09.png" alt=""></p><p>利用终端工具 <a href="https://mp.weixin.qq.com/s/HeUAPe4LqqjfzIeWDe8KIg" target="_blank" rel="noopener noreferrer">Tabby<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，将 jar 包上传到服务器。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/initializr-10.png" alt=""></p><p>执行 <code>java -jar tobebetterjavaer-0.0.1-SNAPSHOT.jar</code> 命令。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/initializr-11.png" alt=""></p><p>what？？？？？？竟然没有安装 JDK。好吧，为了带白票阿里云服务器的小伙伴一起学习 Linux，我下了血本自己买了一台零添加的服务器。</p><p>PS：需要在 centos 环境下安装 JDK 的小伙伴可以看这篇。</p><blockquote><p><a href="https://segmentfault.com/a/1190000015389941" target="_blank" rel="noopener noreferrer">https://segmentfault.com/a/1190000015389941<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>安装好 JDK 后，再次执行命令就可以看到 Spring Boot 项目可以正常在服务器上跑起来了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/initializr-12.png" alt=""></p><h2 id="第一个web项目" tabindex="-1"><a class="header-anchor" href="#第一个web项目" aria-hidden="true">#</a> 第一个Web项目</h2><p>项目既然启动成功了，我们在浏览器里访问 8080 端口测试下吧。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/initializr-13.png" alt=""></p><p>咦，竟然 Whitelabel 了，这个 404 页面是 Spring Boot 默认的错误页面，表示我们的请求在 Web 服务中不存在。</p><p>那该怎么办呢？</p><p>我们来增加一个 Controller 文件，用来处理 Web 请求，内容如下。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>@Controller
 public class HelloController {
     
     @GetMapping(&quot;/hello&quot;)
@@ -59,11 +59,11 @@ public class HelloController {
         return &quot;hello, springboot&quot;;
     }
 }
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>这段代码的业务逻辑非常简单，用户发送 hello 请求，服务器端响应一个“hello, springboot”回去。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/initializr-14.png" alt=""></p><p>OK，现在可以访问到了。也就表明我们的第一个 Spring Boot 项目开发完成了。</p><h3 id="热部署" tabindex="-1"><a class="header-anchor" href="#热部署" aria-hidden="true">#</a> 热部署</h3><p>作为开发者，我们希望每次修改代码后，代码能够自动编译，服务能够自动重新加载，这样就省去了重新运行代码的烦恼。</p><p>那 spring-boot-devtools 就是这样的一个神器，当我们把它添加到项目当中后，无论是代码修改，还是配置文件修改，服务都能够秒级重载（俗称热部署），这在我们开发的时候，非常有用。</p><p>怎么才能开启热部署呢？</p><p>第一步，在 pom.xml 文件中添加依赖。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>这段代码的业务逻辑非常简单，用户发送 hello 请求，服务器端响应一个“hello, springboot”回去。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/initializr-14.png" alt=""></p><p>OK，现在可以访问到了。也就表明我们的第一个 Spring Boot 项目开发完成了。</p><h2 id="热部署" tabindex="-1"><a class="header-anchor" href="#热部署" aria-hidden="true">#</a> 热部署</h2><p>作为开发者，我们希望每次修改代码后，代码能够自动编译，服务能够自动重新加载，这样就省去了重新运行代码的烦恼。</p><p>那 spring-boot-devtools 就是这样的一个神器，当我们把它添加到项目当中后，无论是代码修改，还是配置文件修改，服务都能够秒级重载（俗称热部署），这在我们开发的时候，非常有用。</p><p>怎么才能开启热部署呢？</p><p>第一步，在 pom.xml 文件中添加依赖。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
     &lt;groupId&gt;org.springframework.boot&lt;/groupId&gt;
     &lt;artifactId&gt;spring-boot-devtools&lt;/artifactId&gt;
 &lt;/dependency&gt;
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>第二步，没有第二步了，哈哈。</p><p>直接修改代码来体验一下吧。我们修改 HelloController 内容为：</p><hr><p>更多内容，只针对《Java 程序员进阶之路》星球用户开放，需要的小伙伴可以<a href="/springboot/docs/zhishixingqiu/" class="">戳链接🔗</a>加入我们的星球，一起学习，一起卷。。<strong>编程喵</strong>🐱是一个 Spring Boot+Vue 的前后端分离项目，融合了市面上绝大多数流行的技术要点。通过学习实战项目，你可以将所学的知识通过实践进行检验、你可以拓宽自己的技术边界，你可以掌握一个真正的实战项目是如何从 0 到 1 的。</p><hr><h3 id="源码路径" tabindex="-1"><a class="header-anchor" href="#源码路径" aria-hidden="true">#</a> 源码路径</h3><blockquote><ul><li>编程喵：<a href="https://github.com/itwanger/coding-more" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/coding-more<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li>helloworld：<a href="https://github.com/itwanger/codingmore-learning/tree/main/codingmore-helloword" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/codingmore-learning<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul></blockquote><hr><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/springboot/initializr.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/22 上午12:06:08</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><!----><a href="/springboot/mysql-druid.html" class="nav-link next" aria-label="整合MySQL和Druid"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">整合MySQL和Druid<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
-    <script type="module" src="/assets/app.a0271b9c.js" defer></script>
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>第二步，没有第二步了，哈哈。</p><p>直接修改代码来体验一下吧。我们修改 HelloController 内容为：</p><hr><p>更多内容，只针对《Java 程序员进阶之路》星球用户开放，需要的小伙伴可以<a href="https://tobebetterjavaer.com/zhishixingqiu/" target="_blank" rel="noopener noreferrer">戳链接🔗<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>加入我们的星球，一起学习，一起卷。。<strong>编程喵</strong>🐱是一个 Spring Boot+Vue 的前后端分离项目，融合了市面上绝大多数流行的技术要点。通过学习实战项目，你可以将所学的知识通过实践进行检验、你可以拓宽自己的技术边界，你可以掌握一个真正的实战项目是如何从 0 到 1 的。</p><hr><h3 id="源码路径" tabindex="-1"><a class="header-anchor" href="#源码路径" aria-hidden="true">#</a> 源码路径</h3><blockquote><ul><li>编程喵：<a href="https://github.com/itwanger/coding-more" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/coding-more<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li>helloworld：<a href="https://github.com/itwanger/codingmore-learning/tree/main/codingmore-helloword" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/codingmore-learning<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul></blockquote><hr><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a 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aria-label="一、前言"><!---->一、前言<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">二、Java核心</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">三、Java企业级开发</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.1 开发工具</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.2 IDE/编辑器</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">3.3 Spring</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/springboot/aop-log.html" class="nav-link sidebar-link sidebar-page" aria-label="Spring AOP扫盲"><!---->Spring AOP扫盲<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/springboot/ioc.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="Spring IoC扫盲"><!---->Spring IoC扫盲<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/springboot/ioc.html#是何" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="是何"><!---->是何<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/springboot/ioc.html#ioc-容器" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="IoC 容器"><!---->IoC 容器<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/springboot/ioc.html#深入理解-ioc" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="深入理解 IoC"><!---->深入理解 IoC<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/springboot/ioc.html#依赖注入" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="依赖注入"><!---->依赖注入<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/springboot/ioc.html#为何" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="为何"><!---->为何<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/springboot/ioc.html#如何" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="如何"><!---->如何<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/springboot/ioc.html#spring-framework-八大模块" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="Spring Framework 八大模块"><!---->Spring Framework 八大模块<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/springboot/ioc.html#搭建-spring-项目" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="搭建 Spring 项目"><!---->搭建 Spring 项目<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/springboot/ioc.html#一、手动加载-jar-包的方式" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="一、手动加载 jar 包的方式"><!---->一、手动加载 jar 包的方式<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/springboot/ioc.html#二、使用-maven-构建项目" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="二、使用 Maven 构建项目"><!---->二、使用 Maven 构建项目<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/springboot/ioc.html#小结" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="小结"><!---->小结<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.4 SpringBoot</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.5 辅助工具</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.6 开源轮子</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.7 分布式</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.8 消息队列</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Spring IoC扫盲</h1><div class="page-info"><span 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145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 16 分钟</span><meta property="timeRequired" content="PT16M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/ioc.html#是何" class="router-link-active router-link-exact-active toc-link level2">是何</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/ioc.html#ioc-容器" class="router-link-active router-link-exact-active toc-link level3">IoC 容器</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/ioc.html#深入理解-ioc" class="router-link-active router-link-exact-active toc-link level3">深入理解 IoC</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/ioc.html#依赖注入" class="router-link-active router-link-exact-active toc-link level3">依赖注入</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/ioc.html#为何" class="router-link-active router-link-exact-active toc-link level2">为何</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/ioc.html#如何" class="router-link-active router-link-exact-active toc-link level2">如何</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/ioc.html#spring-framework-八大模块" class="router-link-active router-link-exact-active toc-link level3">Spring Framework 八大模块</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/ioc.html#搭建-spring-项目" class="router-link-active router-link-exact-active toc-link level2">搭建 Spring 项目</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/ioc.html#一、手动加载-jar-包的方式" class="router-link-active router-link-exact-active toc-link level3">一、手动加载 jar 包的方式</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/ioc.html#二、使用-maven-构建项目" class="router-link-active router-link-exact-active toc-link level3">二、使用 Maven 构建项目</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/ioc.html#小结" class="router-link-active router-link-exact-active toc-link level2">小结</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="spring-ioc扫盲" tabindex="-1"><a class="header-anchor" href="#spring-ioc扫盲" aria-hidden="true">#</a> Spring IoC扫盲</h1><p>大家好，我是二哥呀。不废话，今天来带你一分钟玩转 Spring IoC。Spring 框架是 Java 后端开发中非常重要的基础框架，可以说必不可缺，而 IoC 又是 Spring 体系中最重要的两个概念之一（另外一个是谁呢？）。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/ioc-dfa5b7d3-43c3-492f-a9f5-59d3bf7b242b.jpg" alt=""></p><h2 id="是何" tabindex="-1"><a class="header-anchor" href="#是何" aria-hidden="true">#</a> 是何</h2><p>Spring 全家桶中最重要的几个项目都是基于 Spring Framework 的，所以我们就以 Spring Framework 为例来看文档。</p><p>首先它的右侧有 Github 的链接，另外点到「LEARN」这里，就会看到各个版本的文档。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/ioc-ecc7dcc3-678f-4b97-8e2b-42fc0d66f555.jpg" alt=""></p><p>那我们点「Reference Doc」，就能够看到它的一些模块的介绍：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/ioc-7ba176c1-5d76-465d-b2b5-5751d6c1ef3b.jpg" alt=""></p><p>第一章 Overview，讲述它的历史、设计原理等等；</p><p>第二章 Core，包含了 IoC 容器，AOP 等等，那自然是讲 Spring 的核心了，要点进去好好看了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/ioc-b068d0cc-8e75-42fc-8391-0cc0e2d84fc8.jpg" alt=""></p><p>点进去之后发现了宝贵的学习资料，一切的 what, why, how 都可以在这里找到答案。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/ioc-e1f5ad2c-2b1a-453e-8672-dd4b6560eb7a.jpg" alt=""></p><p>这里很好的解释了大名鼎鼎的 IoC - Inversion of Control, 控制反转。</p><p>我粗略的总结一下：控制反转就是把创建和管理 bean 的过程转移给了第三方。而这个第三方，就是 Spring IoC Container，对于 IoC 来说，最重要的就是<strong>容器</strong>。</p><p>容器负责创建、配置和管理 bean，也就是它管理着 bean 的生命，控制着 bean 的依赖注入。</p><p>通俗点讲，因为项目中每次创建对象是很麻烦的，所以我们使用 Spring IoC 容器来管理这些对象，需要的时候你就直接用，不用管它是怎么来的、什么时候要销毁，只管用就好了。</p><p>举个例子，就好像父母没时间管孩子，就把小朋友交给托管所，就安心的去上班而不用管孩子了。托儿所，就是第三方容器，负责管理小朋友的吃喝玩乐；父母，相当于程序员，只管接送孩子，不用管他们吃喝。</p><p>等下，<code>bean</code> 又是什么？</p><p>Bean 其实就是包装了的 Object，无论是控制反转还是依赖注入，它们的主语都是 object，而 bean 就是由第三方包装好了的 object。（想一下别人送礼物给你的时候都是要包装一下的，自己造的就免了。</p><p>Bean 是 Spring 的主角，有种说法叫 Spring 就是面向 bean 的编程（Bean Oriented Programming, BOP）。</p><h3 id="ioc-容器" tabindex="-1"><a class="header-anchor" href="#ioc-容器" aria-hidden="true">#</a> IoC 容器</h3><p>既然说容器是 IoC 最重要的部分，那么 Spring 如何设计容器的呢？还是回到官网，第二段有介绍哦：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/ioc-c5c48fc9-162b-4e7c-a660-2984bb7fb69a.jpg" alt=""></p><p>答：使用 <code>ApplicationContext</code>，它是 <code>BeanFactory</code> 的子类，更好的补充并实现了 <code>BeanFactory</code> 的。</p><p><code>BeanFactory</code> 简单粗暴，可以理解为 HashMap：</p><ul><li>Key - bean name</li><li>Value - bean object</li></ul><p>但它一般只有 get, put 两个功能，所以称之为“低级容器”。</p><p>而 <code>ApplicationContext</code> 多了很多功能，因为它继承了多个接口，可称之为“高级容器”。在下文的搭建项目中，我们会使用它。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/ioc-ac7721c3-7892-45a7-840a-2093548f13d6.jpg" alt=""></p><p><code>ApplicationContext</code> 的里面有两个具体的实现子类，用来读取配置配件的：</p><ul><li><code>ClassPathXmlApplicationContext</code> - 从 class path 中加载配置文件，更常用一些；</li><li><code>FileSystemXmlApplicationContext</code> - 从本地文件中加载配置文件，不是很常用，如果再到 Linux 环境中，还要改路径，不是很方便。</li></ul><p>当我们点开 <code>ClassPathXmlApplicationContext</code> 时，发现它并不是直接继承 <code>ApplicationContext</code> 的，它有很多层的依赖关系，每层的子类都是对父类的补充实现。</p><p>而再往上找，发现最上层的 class 回到了 <code>BeanFactory</code>，所以它非常重要。</p><p>要注意，Spring 中还有个 <code>FactoryBean</code>，两者并没有特别的关系，只是名字比较接近，所以不要弄混了顺序。</p><p>为了好理解 IoC，我们先来回顾一下不用 IoC 时写代码的过程。</p><h3 id="深入理解-ioc" tabindex="-1"><a class="header-anchor" href="#深入理解-ioc" aria-hidden="true">#</a> 深入理解 IoC</h3><p>这里用经典 <code>class Rectangle</code> 来举例：</p><ul><li>两个变量：长和宽</li><li>自动生成 <code>set()</code> 方法和 <code>toString()</code> 方法</li></ul><p>注意 ⚠️：一定要生成 <code>set()</code> 方法，因为 Spring IoC 就是通过这个 <code>set()</code> 方法注入的；<code>toString()</code> 方法是为了我们方便打印查看。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">Rectangle</span> <span class="token punctuation">{</span>
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class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/ioc.html#是何" class="router-link-active router-link-exact-active toc-link level2">是何</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/ioc.html#ioc-容器" class="router-link-active router-link-exact-active toc-link level3">IoC 容器</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/ioc.html#深入理解-ioc" class="router-link-active router-link-exact-active toc-link level3">深入理解 IoC</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/ioc.html#依赖注入" class="router-link-active router-link-exact-active toc-link level3">依赖注入</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/ioc.html#为何" class="router-link-active router-link-exact-active toc-link level2">为何</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/ioc.html#如何" class="router-link-active router-link-exact-active toc-link level2">如何</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/ioc.html#spring-framework-八大模块" class="router-link-active router-link-exact-active toc-link level3">Spring Framework 八大模块</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/ioc.html#搭建-spring-项目" class="router-link-active router-link-exact-active toc-link level2">搭建 Spring 项目</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/ioc.html#一、手动加载-jar-包的方式" class="router-link-active router-link-exact-active toc-link level3">一、手动加载 jar 包的方式</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/ioc.html#二、使用-maven-构建项目" class="router-link-active router-link-exact-active toc-link level3">二、使用 Maven 构建项目</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/ioc.html#小结" class="router-link-active router-link-exact-active toc-link level2">小结</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="spring-ioc扫盲" tabindex="-1"><a class="header-anchor" href="#spring-ioc扫盲" aria-hidden="true">#</a> Spring IoC扫盲</h1><p>大家好，我是二哥呀。不废话，今天来带你一分钟玩转 Spring IoC。Spring 框架是 Java 后端开发中非常重要的基础框架，可以说必不可缺，而 IoC 又是 Spring 体系中最重要的两个概念之一（另外一个是谁呢？）。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/ioc-dfa5b7d3-43c3-492f-a9f5-59d3bf7b242b.jpg" alt=""></p><h2 id="是何" tabindex="-1"><a class="header-anchor" href="#是何" aria-hidden="true">#</a> 是何</h2><p>Spring 全家桶中最重要的几个项目都是基于 Spring Framework 的，所以我们就以 Spring Framework 为例来看文档。</p><p>首先它的右侧有 Github 的链接，另外点到「LEARN」这里，就会看到各个版本的文档。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/ioc-ecc7dcc3-678f-4b97-8e2b-42fc0d66f555.jpg" alt=""></p><p>那我们点「Reference Doc」，就能够看到它的一些模块的介绍：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/ioc-7ba176c1-5d76-465d-b2b5-5751d6c1ef3b.jpg" alt=""></p><p>第一章 Overview，讲述它的历史、设计原理等等；</p><p>第二章 Core，包含了 IoC 容器，AOP 等等，那自然是讲 Spring 的核心了，要点进去好好看了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/ioc-b068d0cc-8e75-42fc-8391-0cc0e2d84fc8.jpg" alt=""></p><p>点进去之后发现了宝贵的学习资料，一切的 what, why, how 都可以在这里找到答案。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/ioc-e1f5ad2c-2b1a-453e-8672-dd4b6560eb7a.jpg" alt=""></p><p>这里很好的解释了大名鼎鼎的 IoC - Inversion of Control, 控制反转。</p><p>我粗略的总结一下：控制反转就是把创建和管理 bean 的过程转移给了第三方。而这个第三方，就是 Spring IoC Container，对于 IoC 来说，最重要的就是<strong>容器</strong>。</p><p>容器负责创建、配置和管理 bean，也就是它管理着 bean 的生命，控制着 bean 的依赖注入。</p><p>通俗点讲，因为项目中每次创建对象是很麻烦的，所以我们使用 Spring IoC 容器来管理这些对象，需要的时候你就直接用，不用管它是怎么来的、什么时候要销毁，只管用就好了。</p><p>举个例子，就好像父母没时间管孩子，就把小朋友交给托管所，就安心的去上班而不用管孩子了。托儿所，就是第三方容器，负责管理小朋友的吃喝玩乐；父母，相当于程序员，只管接送孩子，不用管他们吃喝。</p><p>等下，<code>bean</code> 又是什么？</p><p>Bean 其实就是包装了的 Object，无论是控制反转还是依赖注入，它们的主语都是 object，而 bean 就是由第三方包装好了的 object。（想一下别人送礼物给你的时候都是要包装一下的，自己造的就免了。</p><p>Bean 是 Spring 的主角，有种说法叫 Spring 就是面向 bean 的编程（Bean Oriented Programming, BOP）。</p><h3 id="ioc-容器" tabindex="-1"><a class="header-anchor" href="#ioc-容器" aria-hidden="true">#</a> IoC 容器</h3><p>既然说容器是 IoC 最重要的部分，那么 Spring 如何设计容器的呢？还是回到官网，第二段有介绍哦：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/ioc-c5c48fc9-162b-4e7c-a660-2984bb7fb69a.jpg" alt=""></p><p>答：使用 <code>ApplicationContext</code>，它是 <code>BeanFactory</code> 的子类，更好的补充并实现了 <code>BeanFactory</code> 的。</p><p><code>BeanFactory</code> 简单粗暴，可以理解为 HashMap：</p><ul><li>Key - bean name</li><li>Value - bean object</li></ul><p>但它一般只有 get, put 两个功能，所以称之为“低级容器”。</p><p>而 <code>ApplicationContext</code> 多了很多功能，因为它继承了多个接口，可称之为“高级容器”。在下文的搭建项目中，我们会使用它。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/ioc-ac7721c3-7892-45a7-840a-2093548f13d6.jpg" alt=""></p><p><code>ApplicationContext</code> 的里面有两个具体的实现子类，用来读取配置配件的：</p><ul><li><code>ClassPathXmlApplicationContext</code> - 从 class path 中加载配置文件，更常用一些；</li><li><code>FileSystemXmlApplicationContext</code> - 从本地文件中加载配置文件，不是很常用，如果再到 Linux 环境中，还要改路径，不是很方便。</li></ul><p>当我们点开 <code>ClassPathXmlApplicationContext</code> 时，发现它并不是直接继承 <code>ApplicationContext</code> 的，它有很多层的依赖关系，每层的子类都是对父类的补充实现。</p><p>而再往上找，发现最上层的 class 回到了 <code>BeanFactory</code>，所以它非常重要。</p><p>要注意，Spring 中还有个 <code>FactoryBean</code>，两者并没有特别的关系，只是名字比较接近，所以不要弄混了顺序。</p><p>为了好理解 IoC，我们先来回顾一下不用 IoC 时写代码的过程。</p><h3 id="深入理解-ioc" tabindex="-1"><a class="header-anchor" href="#深入理解-ioc" aria-hidden="true">#</a> 深入理解 IoC</h3><p>这里用经典 <code>class Rectangle</code> 来举例：</p><ul><li>两个变量：长和宽</li><li>自动生成 <code>set()</code> 方法和 <code>toString()</code> 方法</li></ul><p>注意 ⚠️：一定要生成 <code>set()</code> 方法，因为 Spring IoC 就是通过这个 <code>set()</code> 方法注入的；<code>toString()</code> 方法是为了我们方便打印查看。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">Rectangle</span> <span class="token punctuation">{</span>
     <span class="token keyword">private</span> <span class="token keyword">int</span> width<span class="token punctuation">;</span>
     <span class="token keyword">private</span> <span class="token keyword">int</span> length<span class="token punctuation">;</span>
 
@@ -87,6 +87,6 @@
   <span class="token punctuation">}</span>
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 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>返回 True or False?</p><p>答：True</p><p>因为默认是单例的，如果要改，需要在配置文件里改<code>&lt;bean … scope = “prototype”&gt;</code>.</p><p>至于这些标签的用法，这里不再延伸了～</p><h5 id="follow-up-2-容器中的对象是什么时候创建的" tabindex="-1"><a class="header-anchor" href="#follow-up-2-容器中的对象是什么时候创建的" aria-hidden="true">#</a> Follow up 2. 容器中的对象是什么时候创建的？</h5><p>实践是检验的唯一标准：</p><p>定义一个无参的 constructor，里面打印一句话，然后只 <code>new ClassPathXmlApplicationContext</code>，如下图：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/ioc-f987d03d-1f8a-47b2-b157-b325081f54b0.jpg" alt=""></p><p>发现也是可以打印的，所以其实是每次启动容器的时候，就已经创建好容器中的所有对象了。（当然，这在 <code>scope = &quot;prototype&quot;</code> 的时候不适用，只是 singleton 的时候。）</p><p>多说一句，其实最好应该一直保留一个无参的 constructor，因为这里 bean 对象的创建是通过反射，</p><ul><li><code>clazz.newInstance()</code> 默认是调用无参的 constructor</li></ul><p>不过，现在已经被弃用掉了，换用了这个：</p><ul><li><code>clazz.getDeclaredConstructor().newInstance()</code></li></ul><h3 id="二、使用-maven-构建项目" tabindex="-1"><a class="header-anchor" href="#二、使用-maven-构建项目" aria-hidden="true">#</a> 二、使用 Maven 构建项目</h3><p>我们再回到最开始的构建项目，相信大家都体会到了手动导入 jar 包的繁琐之处，其实我们还可以用 Maven 来管理项目中的 jar 包，在公司中也是比较常用的一种方式，免除了手动下载 jar 包的过程。</p><h4 id="_1-新建项目" tabindex="-1"><a class="header-anchor" href="#_1-新建项目" aria-hidden="true">#</a> 1. 新建项目</h4><p>使用 Maven 的话就简化很多了，首先我们创建一个 Maven 项目，不同于刚才的过程在于：</p><p>New Project 的时候要选择从 Maven 构建，而不是一个简单的 Java 项目。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/ioc-051637c7-1ae4-4b32-9e7c-ac05d5a8fc38.jpg" alt=""></p><p>建好之后，我们会发现比起刚才的 Java 项目，多了很多东西：</p><p>和之前的空项目不太一样，这里有 <code>main</code>, <code>test</code>，其中 <code>resources</code> 是放配置文件的地方，也就是我们刚才的 <code>service.xml</code> 应该放在这里，如果没有放对位置是代码找不到哦～</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/ioc-773f1aaf-eef1-4fcb-abee-331d31e3e9e2.jpg" alt=""></p><h4 id="_2-添加对应的-pom-依赖-就不用手动导-jar-包了" tabindex="-1"><a class="header-anchor" href="#_2-添加对应的-pom-依赖-就不用手动导-jar-包了" aria-hidden="true">#</a> 2. 添加对应的 pom 依赖，就不用手动导 jar 包了</h4><ol><li><p>仓库地址 <code>https://mvnrepository.com/</code></p></li><li><p>搜 <code>spring</code></p></li><li><p>选择 <code>Spring context</code> → <code>5.2.3 release</code>，把里面的配置 copy 到 <code>pom.xml</code> 中</p></li></ol><p>最终在左边 external libraries 会自动出现所需的包，一键导入，不要太方便～</p><h4 id="_3-写代码-🎉🎉" tabindex="-1"><a class="header-anchor" href="#_3-写代码-🎉🎉" aria-hidden="true">#</a> 3. 写代码～～🎉🎉</h4><h2 id="小结" tabindex="-1"><a class="header-anchor" href="#小结" aria-hidden="true">#</a> 小结</h2><p>我们最后再来体会一下用 Spring 创建对象的过程：</p><p>通过 <code>ApplicationContext</code> 这个 IoC 容器的入口，用它的两个具体的实现子类，从 class path 或者 file path 中读取数据，用 <code>getBean()</code> 获取具体的 bean instance。</p><p>那使用 Spring 到底省略了我们什么工作？</p><p>答：<code>new 的过程</code>。把 new 的过程交给第三方来创建、管理，这就是「解藕」。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/ioc-1a4f2b12-34a4-4fc1-94be-bd9a1a4c16e8.jpg" alt=""></p><p>Spring 也是用的 <code>set()</code> 方法，它只不过提供了一套更加完善的实现机制而已。</p><p>而说到底，底层的原理并没有很复杂，只是为了提高扩展性、兼容性，Spring 提供了丰富的支持，所以才觉得源码比较难。</p><p>因为框架是要给各种各样的用户来使用的，它们考虑的更多的是扩展性。如果让我们来实现，或许三五行就能搞定，但是我们实现的不完善、不完整、不严谨，总之不高大上，所以它写三五十行，把框架设计的尽可能的完善，提供了丰富的支持，满足不同用户的需求，才能占领更大的市场啊。</p><hr><blockquote><p>作者：小齐，转载链接：<a href="https://mp.weixin.qq.com/s/CcL3cEcQRi-KhwTwmf5A0w" target="_blank" rel="noopener noreferrer">https://mp.weixin.qq.com/s/CcL3cEcQRi-KhwTwmf5A0w<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" 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class="toc-item"><a aria-current="page" href="/springboot/jpa.html#测试-spring-data-jpa" class="router-link-active router-link-exact-active toc-link level3">测试 Spring Data JPA</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/jpa.html#spring-data-jpa-和-mybatis-的对比" class="router-link-active router-link-exact-active toc-link level3">Spring Data JPA 和 MyBatis 的对比</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/jpa.html#源码地址" class="router-link-active router-link-exact-active toc-link level3">源码地址：</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h3 id="spring-data-jpa-简介" tabindex="-1"><a class="header-anchor" href="#spring-data-jpa-简介" aria-hidden="true">#</a> Spring Data JPA 简介</h3><p>Spring Data 是 Spring 提供的一个操作数据的框架，Spring Data JPA是 Spring Data 下的一个基于 JPA 标准的操作数据的模块。</p><p>JPA（Java Persistence API）是 Java 亲妈 Sun 公司提出的一套 Java 持久化规范。所谓规范，就是只定义标准，不提供实现。</p><p>JPA 的提出主要是为了整合市面上已有的 ORM 框架，比如说 Hibernate、EclipseLink 等。官方觉得你们搞框架可以，但不要乱搞，得按照我的标准来。</p><p>Spring Data JPA 只是一个抽象层，它上接 JPA 下接 ORM 框架，通过基于 JPA 的 Respository 接口极大地减少了 JPA 作为数据访问方案的代码量，简化了持久层开发并且屏蔽了各大 ORM 框架的差异。</p><p>总结一下就是：</p><ul><li>JPA 是规范，统一了规范才便于使用。</li><li>Hibernate 是 JPA 的实现，是一套成熟的 ORM 框架。</li><li>Spring Data JPA 是 Spring 提出的，它增加了一个抽象层，用来屏蔽不同 ORM 框架的差异。</li></ul><h3 id="spring-boot-整合-spring-data-jpa" tabindex="-1"><a class="header-anchor" href="#spring-boot-整合-spring-data-jpa" aria-hidden="true">#</a> Spring Boot 整合 Spring Data JPA</h3><p>第一步，在 pom.xml 文件中添加 JPA 的 starter 依赖。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
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clickable"><!----><span class="title">3.7 分布式</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.8 消息队列</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Spring Boot 整合 JPA</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path 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33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年5月9日</span><meta property="datePublished" content="2022-05-09T06:49:16.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category5" role>Java企业级开发</li><meta property="articleSection" content="Java企业级开发"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag1" role>Spring Boot</li></ul><meta property="keywords" content="Spring Boot"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 7 分钟</span><meta property="timeRequired" content="PT7M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/jpa.html#spring-data-jpa-简介" class="router-link-active router-link-exact-active toc-link level2">Spring Data JPA 简介</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/jpa.html#spring-boot-整合-spring-data-jpa" class="router-link-active router-link-exact-active toc-link level2">Spring Boot 整合 Spring Data JPA</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/jpa.html#测试-spring-data-jpa" class="router-link-active router-link-exact-active toc-link level2">测试 Spring Data JPA</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/jpa.html#spring-data-jpa-和-mybatis-的对比" class="router-link-active router-link-exact-active toc-link level2">Spring Data JPA 和 MyBatis 的对比</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/jpa.html#源码地址" class="router-link-active router-link-exact-active toc-link level2">源码地址：</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h2 id="spring-data-jpa-简介" tabindex="-1"><a class="header-anchor" href="#spring-data-jpa-简介" aria-hidden="true">#</a> Spring Data JPA 简介</h2><p>Spring Data 是 Spring 提供的一个操作数据的框架，Spring Data JPA是 Spring Data 下的一个基于 JPA 标准的操作数据的模块。</p><p>JPA（Java Persistence API）是 Java 亲妈 Sun 公司提出的一套 Java 持久化规范。所谓规范，就是只定义标准，不提供实现。</p><p>JPA 的提出主要是为了整合市面上已有的 ORM 框架，比如说 Hibernate、EclipseLink 等。官方觉得你们搞框架可以，但不要乱搞，得按照我的标准来。</p><p>Spring Data JPA 只是一个抽象层，它上接 JPA 下接 ORM 框架，通过基于 JPA 的 Respository 接口极大地减少了 JPA 作为数据访问方案的代码量，简化了持久层开发并且屏蔽了各大 ORM 框架的差异。</p><p>总结一下就是：</p><ul><li>JPA 是规范，统一了规范才便于使用。</li><li>Hibernate 是 JPA 的实现，是一套成熟的 ORM 框架。</li><li>Spring Data JPA 是 Spring 提出的，它增加了一个抽象层，用来屏蔽不同 ORM 框架的差异。</li></ul><h2 id="spring-boot-整合-spring-data-jpa" tabindex="-1"><a class="header-anchor" href="#spring-boot-整合-spring-data-jpa" aria-hidden="true">#</a> Spring Boot 整合 Spring Data JPA</h2><p>第一步，在 pom.xml 文件中添加 JPA 的 starter 依赖。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
     &lt;groupId&gt;org.springframework.boot&lt;/groupId&gt;
     &lt;artifactId&gt;spring-boot-starter-data-jpa&lt;/artifactId&gt;
 &lt;/dependency&gt;
@@ -126,7 +126,7 @@
 <span class="token keyword">public</span> <span class="token class-name">List</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">User</span><span class="token punctuation">&gt;</span></span> <span class="token function">findByNameLikeIgnoreCase</span><span class="token punctuation">(</span><span class="token class-name">String</span> name<span class="token punctuation">)</span> <span class="token punctuation">{</span>
     <span class="token keyword">return</span> userRepository<span class="token punctuation">.</span><span class="token function">findByNameLikeIgnoreCase</span><span class="token punctuation">(</span>name<span class="token punctuation">)</span><span class="token punctuation">;</span>
 <span class="token punctuation">}</span>
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="测试-spring-data-jpa" tabindex="-1"><a class="header-anchor" href="#测试-spring-data-jpa" aria-hidden="true">#</a> 测试 Spring Data JPA</h3><p>在测试类中对服务类中的 5 个接口进行测试，顺带在application.yml 中开启 SQL 语句的输出，看看 JPA 自动生成的 SQL 语句到底长什么样子。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/jpa-a3d8641a-c701-47bb-ae44-f53eb8e05f65.png" alt=""></p><p>测试类非常简单哈：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token annotation punctuation">@SpringBootTest</span>
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h2 id="测试-spring-data-jpa" tabindex="-1"><a class="header-anchor" href="#测试-spring-data-jpa" aria-hidden="true">#</a> 测试 Spring Data JPA</h2><p>在测试类中对服务类中的 5 个接口进行测试，顺带在application.yml 中开启 SQL 语句的输出，看看 JPA 自动生成的 SQL 语句到底长什么样子。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/jpa-a3d8641a-c701-47bb-ae44-f53eb8e05f65.png" alt=""></p><p>测试类非常简单哈：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token annotation punctuation">@SpringBootTest</span>
 <span class="token annotation punctuation">@Slf4j</span>
 <span class="token keyword">class</span> <span class="token class-name">CodingmoreJpaApplicationTests</span> <span class="token punctuation">{</span>
     <span class="token annotation punctuation">@Resource</span>
@@ -163,7 +163,7 @@
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p><code>@Query</code> 注解中的 “user” 为数据库表名，另外需要加上参数 nativeQuery，默认值为 false，设为 true 表明开启原生 SQL 查询。注意这次我们用“||”替换了“concat” 方法。</p><p>除了使用 <code>?1</code>、<code>?2</code> 的形式来动态传递参数，我们还可以使用 <code>@Param</code> 注解的形式来传递参数，此时的 SQL 语句中采用 <code>:param</code> 形式来接收参数。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token annotation punctuation">@Query</span><span class="token punctuation">(</span><span class="token string">&quot;select u from User u where u.name like concat(&#39;%&#39;,:name,&#39;%&#39;)&quot;</span><span class="token punctuation">)</span>
 <span class="token class-name">List</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">User</span><span class="token punctuation">&gt;</span></span> <span class="token function">findByNameLikeParam</span><span class="token punctuation">(</span><span class="token annotation punctuation">@Param</span><span class="token punctuation">(</span><span class="token string">&quot;name&quot;</span><span class="token punctuation">)</span><span class="token class-name">String</span> name<span class="token punctuation">)</span><span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><p>这是删除：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>Hibernate: delete from user where id=?
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h3 id="spring-data-jpa-和-mybatis-的对比" tabindex="-1"><a class="header-anchor" href="#spring-data-jpa-和-mybatis-的对比" aria-hidden="true">#</a> Spring Data JPA 和 MyBatis 的对比</h3><hr><p>更多内容，只针对《Java 程序员进阶之路》星球用户开放，需要的小伙伴可以<a href="/springboot/docs/zhishixingqiu/" class="">戳链接🔗</a>加入我们的星球，一起学习，一起卷。。<strong>编程喵</strong>🐱是一个 Spring Boot+Vue 的前后端分离项目，融合了市面上绝大多数流行的技术要点。通过学习实战项目，你可以将所学的知识通过实践进行检验、你可以拓宽自己的技术边界，你可以掌握一个真正的实战项目是如何从 0 到 1 的。</p><hr><h3 id="源码地址" tabindex="-1"><a class="header-anchor" href="#源码地址" aria-hidden="true">#</a> 源码地址：</h3><blockquote><ul><li>编程喵：<a href="https://github.com/itwanger/coding-more" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/coding-more<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li>Spring Boot 整合 JPA：<a href="https://github.com/itwanger/codingmore-learning" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/codingmore-learning<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul></blockquote><hr><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/springboot/jpa.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 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+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h2 id="spring-data-jpa-和-mybatis-的对比" tabindex="-1"><a class="header-anchor" href="#spring-data-jpa-和-mybatis-的对比" aria-hidden="true">#</a> Spring Data JPA 和 MyBatis 的对比</h2><hr><p>更多内容，只针对《Java 程序员进阶之路》星球用户开放，需要的小伙伴可以<a href="https://tobebetterjavaer.com/zhishixingqiu/" target="_blank" rel="noopener noreferrer">戳链接🔗<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>加入我们的星球，一起学习，一起卷。。<strong>编程喵</strong>🐱是一个 Spring Boot+Vue 的前后端分离项目，融合了市面上绝大多数流行的技术要点。通过学习实战项目，你可以将所学的知识通过实践进行检验、你可以拓宽自己的技术边界，你可以掌握一个真正的实战项目是如何从 0 到 1 的。</p><hr><h2 id="源码地址" tabindex="-1"><a class="header-anchor" href="#源码地址" aria-hidden="true">#</a> 源码地址：</h2><blockquote><ul><li>编程喵：<a href="https://github.com/itwanger/coding-more" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/coding-more<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li>Spring Boot 整合 JPA：<a href="https://github.com/itwanger/codingmore-learning/tree/main/codingmore-jpa" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/codingmore-learning/tree/main/codingmore-jpa<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul></blockquote><hr><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item 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class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/jwt.html#干掉session-这个跨域认证解决方案真的优雅" class="router-link-active router-link-exact-active toc-link level2">干掉Session？这个跨域认证解决方案真的优雅！</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/jwt.html#一、关于-jwt" class="router-link-active router-link-exact-active toc-link level3">一、关于 JWT</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/jwt.html#二、实战-jwt" class="router-link-active router-link-exact-active toc-link level3">二、实战 JWT</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/jwt.html#三、swagger-中添加-jwt-验证" class="router-link-active router-link-exact-active toc-link level3">三、Swagger 中添加 JWT 验证</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/jwt.html#四、总结" class="router-link-active router-link-exact-active toc-link level3">四、总结</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h2 id="干掉session-这个跨域认证解决方案真的优雅" tabindex="-1"><a class="header-anchor" href="#干掉session-这个跨域认证解决方案真的优雅" aria-hidden="true">#</a> 干掉Session？这个跨域认证解决方案真的优雅！</h2><p>用户登录认证是 Web 应用中非常常见的一个业务，一般的流程是这样的：</p><ul><li>客户端向服务器端发送用户名和密码</li><li>服务器端验证通过后，在当前会话（session）中保存相关数据，比如说登录时间、登录 IP 等。</li><li>服务器端向客户端返回一个 session_id，客户端将其保存在 Cookie 中。</li><li>客户端再向服务器端发起请求时，将 session_id 传回给服务器端。</li><li>服务器端拿到 session_id 后，对用户的身份进行鉴定。</li></ul><p>单机情况下，这种模式是没有任何问题的，但对于前后端分离的 Web 应用来说，就非常痛苦了。于是就有了另外一种解决方案，服务器端不再保存 session 数据，而是将其保存在客户端，客户端每次发起请求时再把这个数据发送给服务器端进行验证。<strong>JWT</strong>（JSON Web Token）就是这种方案的典型代表。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/jwt-1.png" alt=""></p><h3 id="一、关于-jwt" tabindex="-1"><a class="header-anchor" href="#一、关于-jwt" aria-hidden="true">#</a> 一、关于 JWT</h3><p>JWT，是目前最流行的一个<a href="https://mp.weixin.qq.com/s/HTMDZaukCb7pyfHefVcfyg" target="_blank" rel="noopener noreferrer">跨域<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>认证解决方案：客户端发起用户登录请求，服务器端接收并认证成功后，生成一个 JSON 对象（如下所示），然后将其返回给客户端。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>{
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class="router-link-active router-link-exact-active toc-link level3">一、关于 JWT</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/jwt.html#二、实战-jwt" class="router-link-active router-link-exact-active toc-link level3">二、实战 JWT</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/jwt.html#三、swagger-中添加-jwt-验证" class="router-link-active router-link-exact-active toc-link level3">三、Swagger 中添加 JWT 验证</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/jwt.html#四、总结" class="router-link-active router-link-exact-active toc-link level3">四、总结</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h2 id="干掉session-这个跨域认证解决方案真的优雅" tabindex="-1"><a class="header-anchor" href="#干掉session-这个跨域认证解决方案真的优雅" aria-hidden="true">#</a> 干掉Session？这个跨域认证解决方案真的优雅！</h2><p>用户登录认证是 Web 应用中非常常见的一个业务，一般的流程是这样的：</p><ul><li>客户端向服务器端发送用户名和密码</li><li>服务器端验证通过后，在当前会话（session）中保存相关数据，比如说登录时间、登录 IP 等。</li><li>服务器端向客户端返回一个 session_id，客户端将其保存在 Cookie 中。</li><li>客户端再向服务器端发起请求时，将 session_id 传回给服务器端。</li><li>服务器端拿到 session_id 后，对用户的身份进行鉴定。</li></ul><p>单机情况下，这种模式是没有任何问题的，但对于前后端分离的 Web 应用来说，就非常痛苦了。于是就有了另外一种解决方案，服务器端不再保存 session 数据，而是将其保存在客户端，客户端每次发起请求时再把这个数据发送给服务器端进行验证。<strong>JWT</strong>（JSON Web Token）就是这种方案的典型代表。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/jwt-1.png" alt=""></p><h3 id="一、关于-jwt" tabindex="-1"><a class="header-anchor" href="#一、关于-jwt" aria-hidden="true">#</a> 一、关于 JWT</h3><p>JWT，是目前最流行的一个<a href="https://mp.weixin.qq.com/s/HTMDZaukCb7pyfHefVcfyg" target="_blank" rel="noopener noreferrer">跨域<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>认证解决方案：客户端发起用户登录请求，服务器端接收并认证成功后，生成一个 JSON 对象（如下所示），然后将其返回给客户端。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>{
   &quot;sub&quot;: &quot;wanger&quot;,
   &quot;created&quot;: 1645700436900,
   &quot;exp&quot;: 1646305236
@@ -261,6 +261,6 @@ export function setToken (token) {
     <span class="token punctuation">}</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>JwtAuthenticationTokenFilter 继承了 OncePerRequestFilter，该过滤器能确保一次请求只通过一次 filter，而不需要重复执行。也就是说，客户端每发起一次请求，该过滤器就会执行一次。</p><p>这个过滤器非常关键啊，基本上每行代码我都添加了注释，当然了，为了确保大家都能搞清楚这个类到底做了什么，我再来画一幅流程图，这样就一清二楚了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/jwt-5.png" alt=""></p><p>SpringSecurity 是一个安全管理框架，可以和 Spring Boot 应用无缝衔接，SecurityContextHolder 是其中非常关键的一个工具类，持有安全上下文信息，里面保存有当前操作的用户是谁，用户是否已经被认证，用户拥有的权限等关键信息。</p><p>SecurityContextHolder 默认使用了 ThreadLocal 策略来存储认证信息，ThreadLocal 的特点是存在它里边的数据，哪个线程存的，哪个线程才能访问到。这就意味着不同的请求进入到服务器端后，会由不同的 Thread 去处理，例如线程 A 将请求 1 的用户信息存入了 ThreadLocal，线程 B 在处理请求 2 的时候是无法获取到用户信息的。</p><p>所以说 JwtAuthenticationTokenFilter 过滤器会在每次请求过来的时候进行一遍 JWT 的验证，确保客户端过来的请求是安全的。然后 SpringSecurity 才会对接下来的请求接口放行。这也是 JWT 和 Session 的根本区别：</p><ul><li>JWT 需要每次请求的时候验证一次，并且只要 JWT 没有过期，哪怕服务器端重启了，认证仍然有效。</li><li>Session 在没有过期的情况下是不需要重新对用户信息进行验证的，当服务器端重启后，用户需要重新登录获取新的 Session。</li></ul><p>也就是说，<strong>在 JWT 的方案下，服务器端保存的密钥（secret）一定不能泄露，否则客户端就可以根据签名算法伪造用户的认证信息了</strong>。</p><h3 id="三、swagger-中添加-jwt-验证" tabindex="-1"><a class="header-anchor" href="#三、swagger-中添加-jwt-验证" aria-hidden="true">#</a> 三、Swagger 中添加 JWT 验证</h3><p>对于后端开发人员来说，如何在 <a href="https://mp.weixin.qq.com/s/gWPCg6TP3G_-I-eqA6EJmA" target="_blank" rel="noopener noreferrer">Swagger（整合了 Knife4j 进行美化）<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a> 中添加 JWT 验证呢？</p><p>第一步，访问 login 接口，输入用户名和密码进行登录，获取服务器端返回的 JWT。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/jwt-6.png" alt=""></p><p>第二步，收集服务器端返回的 tokenHead 和 token，将其填入 Authorize（注意 tokenHead 和 token 之间有一个空格）完成登录认证。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/jwt-7.png" alt=""></p><p>第三步，再次请求其他接口时，Swagger 会自动将 Authorization 作为请求头信息发送到服务器端。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/jwt-8.png" alt=""></p><p>第四步，服务器端接收到该请求后，会通过 JwtAuthenticationTokenFilter 过滤器对 JWT 进行校验。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/jwt-9.png" alt=""></p><p>到此为止，整个流程全部打通了，完美！</p><h3 id="四、总结" tabindex="-1"><a class="header-anchor" href="#四、总结" aria-hidden="true">#</a> 四、总结</h3><p>综上来看，用 JWT 来解决前后端分离项目中的跨域认证还是非常丝滑的，这主要得益于 JSON 的通用性，可以跨语言，JavaScript 和 Java 都支持；另外，JWT 的组成非常简单，非常便于传输；还有 JWT 不需要在服务器端保存会话信息（Session），非常易于扩展。</p><p>当然了，为了保证 JWT 的安全性，不要在 JWT 中保存敏感信息，因为一旦私钥泄露，JWT 是很容易在客户端被解密的；如果可以，请使用 HTTPS 协议。</p><p>参考链接：</p><blockquote><p>阮一峰：https://www.ruanyifeng.com/blog/2018/07/json_web_token-tutorial.html<br> 春夏秋冬过：https://segmentfault.com/a/1190000012557493<br> 江南一点雨：https://cloud.tencent.com/developer/article/1612175<br> Dearmadman：https://www.jianshu.com/p/576dbf44b2ae<br> mcarozheng：http://www.macrozheng.com/</p></blockquote><p>源码路径：</p><blockquote><p>https://github.com/itwanger/coding-more</p></blockquote><hr><p><strong>本篇已收录至 GitHub 上星标 1.6k+ star 的开源专栏《Java 程序员进阶之路》，据说每一个优秀的 Java 程序员都喜欢她，风趣幽默、通俗易懂。内容包括 Java 基础、Java 并发编程、Java 虚拟机、Java 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25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年6月10日</span><meta property="datePublished" content="2022-06-10T11:28:25.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category5" role>Java企业级开发</li><meta property="articleSection" content="Java企业级开发"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag1" role>Spring Boot</li><li class="tag tag2" role>Vue</li></ul><meta property="keywords" content="Spring Boot,Vue"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 9 分钟</span><meta property="timeRequired" content="PT9M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/linux-codingmore-run.html#云服务器" class="router-link-active router-link-exact-active toc-link level2">云服务器</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/linux-codingmore-run.html#mysql" class="router-link-active router-link-exact-active toc-link level2">MySQL</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/linux-codingmore-run.html#nginx" class="router-link-active router-link-exact-active toc-link level2">Nginx</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/linux-codingmore-run.html#redis" class="router-link-active router-link-exact-active toc-link level2">Redis</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/linux-codingmore-run.html#项目打包" class="router-link-active router-link-exact-active toc-link level2">项目打包</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/linux-codingmore-run.html#_1-codingmore-admin" class="router-link-active router-link-exact-active toc-link level3">1）codingmore-admin</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/linux-codingmore-run.html#_2-codingmore-web" class="router-link-active router-link-exact-active toc-link level3">2）codingmore-web</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/linux-codingmore-run.html#_3-codingmore-admin-web" class="router-link-active router-link-exact-active toc-link level3">3）codingmore-admin-web</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/linux-codingmore-run.html#将打包好的文件上传到服务器" class="router-link-active router-link-exact-active toc-link level2">将打包好的文件上传到服务器</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/linux-codingmore-run.html#一键部署" class="router-link-active router-link-exact-active toc-link level2">一键部署</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/linux-codingmore-run.html#codingmore-web-网站前端" class="router-link-active router-link-exact-active toc-link level3">codingmore-web（网站前端）</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/linux-codingmore-run.html#codingmore-admin-网站管理端" class="router-link-active router-link-exact-active toc-link level3">codingmore-admin（网站管理端）</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/linux-codingmore-run.html#nginx-配置" class="router-link-active router-link-exact-active toc-link level2">Nginx 配置</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/linux-codingmore-run.html#codingmore-web" class="router-link-active router-link-exact-active toc-link level3">codingmore-web</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/linux-codingmore-run.html#codingmore-admin-web" class="router-link-active router-link-exact-active toc-link level3">codingmore-admin-web</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/linux-codingmore-run.html#网站域名" class="router-link-active router-link-exact-active toc-link level2">网站域名</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h2 id="云服务器" tabindex="-1"><a class="header-anchor" href="#云服务器" aria-hidden="true">#</a> 云服务器</h2><p>我们需要一台云服务器，我之前白嫖过一台丐版的，1 核1G 内存，并且已经安装了宝塔面板（安装教程戳<a href="https://tobebetterjavaer.com/szjy/install-baota-mianban.html" target="_blank" rel="noopener noreferrer">链接🔗<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>）。</p><p>这是从宝塔面板首页看到的服务器配置详情。</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-10ef01787c-ee09-4474-a182-70bd6a2daf72.png" alt=""></p><p>马上 618 了，阿里云服务器也开始整活了，需要白嫖的小伙伴可以先加群。</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-10c69c16d4-b9e3-4add-b316-0c4670e76789.png" alt=""></p><h2 id="mysql" tabindex="-1"><a class="header-anchor" href="#mysql" aria-hidden="true">#</a> MySQL</h2><p>登录宝塔面板，点击「数据库」→「添加数据库」，填写数据库名，宝塔面板会自动帮我们创建一个和数据库同名的账号，注意访问权限选择「本地服务器」。</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-10b64e7890-552d-47d5-91bd-03d74bff7974.png" alt=""></p><p>在 codingmore 栏目中点击「导入」「从本地上传」编程喵的数据库文件。上传完成后点击导入。</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-10eec6b672-9089-414b-9f69-65cae18ae45d.png" alt=""></p><p>DB 文件放在 coding-more/doc 目录下。</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-102f8aa2a1-1443-49e6-85d0-6b983863d161.png" alt=""></p><p>建议先做一次备份，点击「无备份」「备份」就可以将我们的数据库文件备份下来了，如果后面想恢复的话，直接点击「恢复」就可以了。</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-10c8edb874-95ad-405c-a57c-9c8b9fab8f6e.png" alt=""></p><p>记住用户名，并复制密码，然后在数据库条目中点击「管理」</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-1032b5cafc-74ef-4e62-b65d-7e36980c14ed.png" alt=""></p><p>填写用户名和密码后，点击执行。</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-105579299a-bc0c-495d-a41b-31d9214835f3.png" alt=""></p><p>就可以看到编程喵的数据库文件了。</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-100877b273-1ba2-40ed-8f96-0031c75e3680.png" alt=""></p><h2 id="nginx" tabindex="-1"><a class="header-anchor" href="#nginx" aria-hidden="true">#</a> Nginx</h2><p><a href="https://tobebetterjavaer.com/nginx/nginx.html" target="_blank" rel="noopener noreferrer">Nginx<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a> 是一个高性能的 HTTP 和反向代理 Web 服务器，基本上就变成了一个服务器必须安装的前置条件之一。</p><p>宝塔面板中安装 Nginx 比较简单，直接在软件商店中搜「Nginx」就可以点击安装了。</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-10cedec531-ae0e-402c-87ca-ee705a469288.png" alt=""></p><h2 id="redis" tabindex="-1"><a class="header-anchor" href="#redis" aria-hidden="true">#</a> Redis</h2><p>宝塔面板中安装 Redis 也比较简单，直接在软件商店中搜「Redis」就可以点击安装了。</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-10eab69fa2-b7cd-419a-a290-0cc0da2b30c3.png" alt=""></p><h2 id="项目打包" tabindex="-1"><a class="header-anchor" href="#项目打包" aria-hidden="true">#</a> 项目打包</h2><h3 id="_1-codingmore-admin" tabindex="-1"><a class="header-anchor" href="#_1-codingmore-admin" aria-hidden="true">#</a> 1）codingmore-admin</h3><p>编程喵的管理后端，注意修改生产环境下的 MySQL 用户名和密码，在 application-prod.yml 文件中。</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-100a38b5dd-ecd4-4734-bf6a-448397fa5463.png" alt=""></p><p>然后把 application.yml 文件中的 active 修改为 prod 生产环境。</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-10dd44a2ce-600d-43b1-8707-4de25287eed9.png" alt=""></p><p>替换 OSS 配置。</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-108ebb40d9-64a1-43cd-89fd-4b83e47025de.png" alt=""></p><h3 id="_2-codingmore-web" tabindex="-1"><a class="header-anchor" href="#_2-codingmore-web" aria-hidden="true">#</a> 2）codingmore-web</h3><p>编程喵的 Web 前端（网站门户、文章展示/文章详情等），注意修改生产环境下的 MySQL 用户名和密码，在 application-prod.yml 文件中。</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-1066ba1162-a198-45e4-87ad-717c62fae6c7.png" alt=""></p><p>然后把 application.yml 文件中的 active 修改为 prod 生产环境。</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-10560633b8-439d-418e-a3bb-61f21efbae9f.png" alt=""></p><p>然后就可以双击 Maven 的 package 打包了。</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-1089745ff7-9222-4d49-b6b9-66fbddba1e52.png" alt=""></p><h3 id="_3-codingmore-admin-web" tabindex="-1"><a class="header-anchor" href="#_3-codingmore-admin-web" aria-hidden="true">#</a> 3）codingmore-admin-web</h3><p>admin 管理端的前端界面。在 Visual Studio Code 中，现在终端中执行 <code>yarn install</code> 安装项目的依赖插件。</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-10d6a9cbaf-fd70-4567-b6b0-b2c50b61407a.png" alt=""></p><p>再执行 <code>yarn run build</code> 就可以构建 codingmore-admin-web 的静态页面了。</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-101aedea50-7f21-4199-9ff2-c264b614e711.png" alt=""></p><p>会在项目的根目录中生成一个 dist 目录，里面就是打包好的管理端静态页面。</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-10128e58f4-172a-4c77-acf1-324ed310412c.png" alt=""></p><p>打包的时候有两个要点要补充下，在 config 目录下有三个配置文件，dev.env.js 是开发环境下的一些配置，index.js 是主配置，prod.env.js 是生产环境下的配置。</p><p>为了提高网站的性能，我们需要关闭 source map，设置 <code>productionSourceMap: false</code>，同时开启 js 和 css 的文件压缩功能。</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-10c2b78cd1-4c55-4fce-9c7a-0afbdd21a659.png" alt=""></p><p>这样打包后的文件大小就会小很多，放到服务器上也能减少网络请求的响应时间。</p><p>可以看得出，最大的一个 js 文件为 3.7M，压缩版只有 662kb，体积缩小了五倍。</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-1009d6dc89-05a3-4a43-972b-bbad4bdd34e5.png" alt=""></p><h2 id="将打包好的文件上传到服务器" tabindex="-1"><a class="header-anchor" href="#将打包好的文件上传到服务器" aria-hidden="true">#</a> 将打包好的文件上传到服务器</h2><p>在宝塔面板中点击「FTP」「添加 FTP」。</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-1047c54369-e3af-48ea-8143-ea1dbce36894.png" alt=""></p><p>点击「根目录」</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-103cdb501e-0145-48b2-ac3f-96b6e99e8ecf.png" alt=""></p><p>跳转到文件页。</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-106d8e3ef4-e032-4c2d-b872-c7ede968a051.png" alt=""></p><p>点击上传，在 target 目录下选择上传的两个 jar 包，admin 和 web。</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-10b1544314-3fc7-4fba-a9e5-28a1760d3517.png" alt=""></p><p>点击「开始上传」</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-10ffe802fb-da43-404a-aaaf-f5b5eb4bdcc3.png" alt=""></p><p>还有 codingmore-admin-web 的静态文件。</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-10f55854dd-b6a5-4a46-8232-e21bb03b788f.png" alt=""></p><h2 id="一键部署" tabindex="-1"><a class="header-anchor" href="#一键部署" aria-hidden="true">#</a> 一键部署</h2><p>在软件商店里搜「<strong>Java</strong>」关键字，可以看到一个「<strong>Java 项目一键部署 3.5</strong>」的插件，安装它。</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-10e784ae11-5d73-41c3-929e-60f7c1114f73.png" alt=""></p><p>进入「Java 项目一键部署」面板。</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-102724c169-4f6c-4208-aa3e-ab4936a14e7a.png" alt=""></p><p>可以在「容器管理」面板中选择 Tomcat 8 安装下，如果没有安装 JDK，在安装 Tomcat 8 的时候会默认安装一个 JDK 1.8。</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-1059bcd44e-be2d-4c7b-81c3-c974f5c9a33a.png" alt=""></p><p>进入 Spring Boot 面板，点击「添加项目」，点击「项目路径」右侧的文件夹图标，就可以上传部署我们的 Spring Boot 项目了。</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-10f39e778b-2d59-4087-bd89-86d71231ff6e.png" alt=""></p><h3 id="codingmore-web-网站前端" tabindex="-1"><a class="header-anchor" href="#codingmore-web-网站前端" aria-hidden="true">#</a> codingmore-web（网站前端）</h3><p>先选择 codingmore-web。</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-108d03852e-c207-442d-9ce9-770c6a16710b.png" alt=""></p><p>填写域名（编程喵的域名为 <a href="codingmore.top">codingmore.top</a>），修改端口号为 8081，application.yml 文件中定义的。</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-10358f631c-27c8-4460-a00e-5c17a3077f28.png" alt=""></p><p>点击确定。</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-1099646018-e244-421c-9232-4f40c4e07444.png" alt=""></p><p>可以看到服务已经在启动了，点「日志」看一下。</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-1053ab9712-5874-4650-92da-e6978803c4de.png" alt=""></p><p>没问题。</p><p>也可以在这个路径下使用终端工具看日志。</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-107242861b-2cfc-4eb2-8414-6afade214a74.png" alt=""></p><p>在安全面板里确认一下 8081 端口是否放开。</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-109c7d80a2-fb84-43b9-86fc-670221607b22.png" alt=""></p><p>确认放开后，打开 Chrome 浏览器的无痕模式，输入 IP+端口号。</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-109f8efbcd-3e6f-4877-ad90-b766dda67879.png" alt=""></p><p>通过域名+端口号的形式也可以访问到。</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-10f50b5c71-35bd-439c-bb82-07348a5155d3.png" alt=""></p><h3 id="codingmore-admin-网站管理端" tabindex="-1"><a class="header-anchor" href="#codingmore-admin-网站管理端" aria-hidden="true">#</a> codingmore-admin（网站管理端）</h3><p>再次进入 「Java 项目一键部署」Spring Boot 面板中，添加 codingmore-admin 项目。</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-1001b5b9f3-05f8-4fdf-9c8a-111ec449826f.png" alt=""></p><p>稍等片刻，来看一下日志。</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-103a4c0249-f250-4199-ba3c-eeb1ca005bd0.png" alt=""></p><p>启动没问题。</p><p>codingmore-admin 只是一个后端服务，界面是用 vue 完成的，所以我们此时可以通过 Swagger 来确认一下接口是否可以正常访问。</p><p>先放行 9002 端口。</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-10f6b25066-3ffa-4dfc-a61c-b6ebb16e339b.png" alt=""></p><p>在浏览器地址栏里输入 <code>http://www.codingmore.top:9002/doc.html</code>，可以看到我们用 Knife4j+Swagger 生成的 API 文档接口。</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-10a04aa484-a7f1-48f1-a3ff-1525b9bd7035.png" alt=""></p><p>OK，这样就可以验证我们的 admin 端服务也正确运行了。</p><p>随后，为了减少服务器被攻击的可能性，我们关掉 9002 的端口。</p><h2 id="nginx-配置" tabindex="-1"><a class="header-anchor" href="#nginx-配置" aria-hidden="true">#</a> Nginx 配置</h2><h3 id="codingmore-web" tabindex="-1"><a class="header-anchor" href="#codingmore-web" aria-hidden="true">#</a> codingmore-web</h3><p>域名+端口号虽然可以访问，但不够优雅，我们想直接访问域名 codingmore.top，该怎么办呢？</p><p>可以使用 <a href="https://tobebetterjavaer.com/nginx/nginx.html" target="_blank" rel="noopener noreferrer">Nginx<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a> 进行端口转发。</p><p>Nginx 的实现原理是，用 Nginx 监听 80 端口，当有 HTTP 请求到来时，将 HTTP 请求的 HOST 等信息与配置文件进行匹配并转发给对应的端口。</p><p>比如说，当用户访问 codingmore.top 时，Nginx 从配置文件中得知这是一个 HTTP 请求，于是将此请求转发给 8081 端口的应用处理。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>upstream codingmore_web_pool{
+    server 127.0.0.1:8081;
+}
+
+server {
+    listen       80;
+    server_name  codingmore.top;
+    access_log logs/codingmore_web.log;
+    error_log logs/codingmore_web.error;
+    
+    #将所有请求转发给pool池的应用处理
+    location / {
+        proxy_set_header Host $host;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_pass http://codingmore_web_pool;
+    }
+}
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>这就是所谓的端口转发，由软件统一监听某个域名上的某个端口（一般是80端口），当访问服务器的域名和端口符合要求时，就按照配置转发给指定的 Tomcat 服务器处理。我们常用的 Nginx 也有端口转发功能。</p><p>OK，原理了解完后，我们把这段配置复制到宝塔面板中的 Nginx 配置中。</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-1053849d03-ca6c-4871-9103-b65238557c50.png" alt=""></p><p>点击「保存」。</p><p>再在浏览器中访问 <a href="http://www.codingmore.top/" target="_blank" rel="noopener noreferrer">codingmore.top<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a> 就可以请求到内容了。</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-106302a681-0dbe-4d76-ac54-243ef67914c7.png" alt=""></p><p>既然如此，我们顺带把 8081 端口给关掉，减少一个服务器被攻击的可能性。</p><p>OK，这样我们就完成了 codingmore-web 也就是编程喵🐱前端的服务部署了。</p><h3 id="codingmore-admin-web" tabindex="-1"><a class="header-anchor" href="#codingmore-admin-web" aria-hidden="true">#</a> codingmore-admin-web</h3><p>codingmore-admin-web 打包后的文件是静态的，所以我们只需要在 Nginx 里添加 admin 的配置路径就 OK 了。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>upstream codingmore_web_pool{
+    server 127.0.0.1:8081;
+}
+
+server {
+    listen       80;
+    server_name  codingmore.top;
+    access_log /home/www/codingmore_web.log;
+    error_log /home/www/codingmore_web.error;
+
+    location /admin {
+        alias /www/wwwroot/itwanger/dist/; # 根目录
+        index index.html;
+    }
+    
+    #将所有请求转发给pool池的应用处理
+    location / {
+        proxy_set_header Host $host;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_pass http://codingmore_web_pool;
+    }
+}
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>我们在 server 中增加了一个 admin 的 location，也就是说，当我们访问 <a href="http://codingmore.top/admin" target="_blank" rel="noopener noreferrer">codingmore.top/admin<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a> 的时候，就去请求 <code>/www/wwwroot/itwanger/dist/</code> 目录下的静态文件。</p><p>这里讲一下 root 和 alias 的区别：</p><ul><li>root：实际访问的地址前缀是 root + 请求的 path路径，即 <code>admin =&gt; /www/wwwroot/itwanger/dist/admin</code></li><li>alias: 实际访问的就是 <code>/www/wwwroot/itwanger/dist</code></li></ul><p>注意两者的区别。我们来访问下<a href="http://codingmore.top/admin" target="_blank" rel="noopener noreferrer">codingmore.top/admin<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>：</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-1050bb8a6a-aeee-4514-a62a-cd87cb82b3d4.png" alt=""></p><p>OK。</p><p>编程喵🐱是一个前后端分离项目，前端的请求如何访问后端的 API 接口呢？简单聊一下。</p><p>打开 codingmore-admin-web/config/prod.env.js 文件，里面有一个 VUE_APP_BASE_API 属性，它的值为 <code>/api</code>，也就意味着前端的请求会发送到 <code>/api</code> 这个前缀路径下。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&#39;use strict&#39;
+module.exports = {
+  NODE_ENV: &#39;&quot;production&quot;&#39;,
+  VUE_APP_BASE_API: &#39;&quot;/api&quot;&#39;
+}
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>那我们的 codingmore-admin 后端服务是跑在 9002 端口下的，这就意味着，我们需要在 Nginx 中增加一个路径，将 api 前缀的请求转发到 9002 下。</p><p>OK，来看一下完整的配置内容。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>upstream codingmore_web_pool{
+    server 127.0.0.1:8081;
+}
+
+upstream codingmore_admin_pool{
+    server 127.0.0.1:9002/;
+}
+
+server {
+    listen       80;
+    server_name  codingmore.top;
+    access_log /home/www/codingmore_web.log;
+    error_log /home/www/codingmore_web.error;
+
+    location /admin {
+        alias /www/wwwroot/itwanger/dist/; # 根目录
+        index index.html;
+    }
+
+    location /api/ {
+        proxy_set_header Host $host;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_pass http://codingmore_admin_pool;
+    }
+    
+    #将所有请求转发给pool池的应用处理
+    location / {
+        proxy_set_header Host $host;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_pass http://codingmore_web_pool;
+    }
+}
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>ok，登录 admin 端，可以看到我们的文章管理页面了。</p><p><img src="https://cdn.tobebetterjavaer.com/codingmore/images/2022-06-1061fbe711-7715-47d5-9bb9-21b872881be1.png" alt=""></p><h2 id="网站域名" tabindex="-1"><a class="header-anchor" href="#网站域名" aria-hidden="true">#</a> 网站域名</h2><ul><li>编程喵 web 端：<a href="http://www.codingmore.top/admin/" target="_blank" rel="noopener noreferrer">www.codingmore.top<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new 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isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 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145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 8 分钟</span><meta property="timeRequired" content="PT8M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/logback.html#关于-logback" class="router-link-active router-link-exact-active toc-link level3">关于 Logback</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/logback.html#直接上手" class="router-link-active router-link-exact-active toc-link level3">直接上手</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/logback.html#编程喵实战项目的日志案例分析" class="router-link-active router-link-exact-active toc-link level3">编程喵实战项目的日志案例分析</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/logback.html#使用-lombok-进行日志记录" class="router-link-active router-link-exact-active toc-link level3">使用 lombok 进行日志记录</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/logback.html#源码路径" class="router-link-active router-link-exact-active toc-link level3">源码路径</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h3 id="关于-logback" tabindex="-1"><a class="header-anchor" href="#关于-logback" aria-hidden="true">#</a> 关于 Logback</h3><p>日志系统是一个线上项目必备的素质之一，代表性的日志框架 Log4j、SLF4J、Logback 这哥仨竟然是亲兄弟，他们有一个亲爹，那就是巨佬 Ceki Gulcu。</p><p>由于 Spring Boot 的默认日志框架选用的 Logback，再加上 Log4j2 之前爆过严重的漏洞，所以我们这次就只关注 Logback。</p><p>1）Logback 非常自然地实现了 SLF4J，不需要像 Log4j 和 JUL 那样加一个适配层。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/logback-67c983bf-101d-48cc-80da-3cb031d7407b.png" alt=""></p><p>2）Spring Boot 的默认日志框架使用的是 Logback，启动编程喵项目的时候就可以看到 Logback 记录的日志了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/logback-a2cacfa1-484a-4904-bea3-248d12097387.png" alt=""></p><p>怎么看出来是 logback 呢？</p><p>说实话，看不出来，哈哈哈，不过可以从 Spring Boot 官网找到证据。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/logback-9ac58c2c-e7f9-4df7-aede-ba7d5c69741c.png" alt=""></p><p>还有，通过源码也可以窥见一二。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/logback-7a10bd7b-598a-4c30-9c83-b80689671f41.png" alt=""></p><p>3）logback 分为三个模块：</p><ul><li>logback-core，核心模块，提供了关键的通用机制；</li><li>logback-classic，可以看作是 log4j 的改进版，实现了简单的日志门面 SLF4J；</li><li>logback-access，主要用来和 Servlet 容器交互，比如说 Tomcat，提供了一些 HTTP 访问的功能。</li></ul><p>如果想研究 logback 源码的话，可以按照这三个模块去研究。</p><h3 id="直接上手" tabindex="-1"><a class="header-anchor" href="#直接上手" aria-hidden="true">#</a> 直接上手</h3><p>不废话，直接新建一个空的 Spring Boot 项目，在测试类中加上两行代码。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token annotation punctuation">@SpringBootTest</span>
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class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/springboot/swagger.html" class="nav-link sidebar-link sidebar-page" aria-label="整合Swagger-UI"><!---->整合Swagger-UI<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/gongju/knife4j.html" class="nav-link sidebar-link sidebar-page" aria-label="整合Knife4j"><!---->整合Knife4j<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/springboot/springtask.html" class="nav-link sidebar-link sidebar-page" aria-label="整合SpringTask"><!---->整合SpringTask<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/kaiyuan/auto-generator.html" class="nav-link sidebar-link sidebar-page" aria-label="整合MyBatis-Plus AutoGenerator"><!---->整合MyBatis-Plus AutoGenerator<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/springboot/macos-codingmore-run.html" class="nav-link sidebar-link sidebar-page" aria-label="macOS下如何运行编程喵源码"><!---->macOS下如何运行编程喵源码<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/springboot/windows-codingmore-run.html" class="nav-link sidebar-link sidebar-page" aria-label="Windows下如何运行编程喵源码"><!---->Windows下如何运行编程喵源码<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.5 辅助工具</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.6 开源轮子</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.7 分布式</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.8 消息队列</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Spring Boot 整合 Logback 定制日志框架</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 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33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年5月21日</span><meta property="datePublished" content="2022-05-21T00:14:16.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 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class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/logback.html#关于-logback" class="router-link-active router-link-exact-active toc-link level2">关于 Logback</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/logback.html#直接上手" class="router-link-active router-link-exact-active toc-link level2">直接上手</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/logback.html#编程喵实战项目的日志案例分析" class="router-link-active router-link-exact-active toc-link level2">编程喵实战项目的日志案例分析</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/logback.html#使用-lombok-进行日志记录" class="router-link-active router-link-exact-active toc-link level2">使用 lombok 进行日志记录</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/logback.html#源码路径" class="router-link-active router-link-exact-active toc-link level2">源码路径</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h2 id="关于-logback" tabindex="-1"><a class="header-anchor" href="#关于-logback" aria-hidden="true">#</a> 关于 Logback</h2><p>日志系统是一个线上项目必备的素质之一，代表性的日志框架 Log4j、SLF4J、Logback 这哥仨竟然是亲兄弟，他们有一个亲爹，那就是巨佬 Ceki Gulcu。</p><p>由于 Spring Boot 的默认日志框架选用的 Logback，再加上 Log4j2 之前爆过严重的漏洞，所以我们这次就只关注 Logback。</p><p>1）Logback 非常自然地实现了 SLF4J，不需要像 Log4j 和 JUL 那样加一个适配层。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/logback-67c983bf-101d-48cc-80da-3cb031d7407b.png" alt=""></p><p>2）Spring Boot 的默认日志框架使用的是 Logback，启动编程喵项目的时候就可以看到 Logback 记录的日志了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/logback-a2cacfa1-484a-4904-bea3-248d12097387.png" alt=""></p><p>怎么看出来是 logback 呢？</p><p>说实话，看不出来，哈哈哈，不过可以从 Spring Boot 官网找到证据。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/logback-9ac58c2c-e7f9-4df7-aede-ba7d5c69741c.png" alt=""></p><p>还有，通过源码也可以窥见一二。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/logback-7a10bd7b-598a-4c30-9c83-b80689671f41.png" alt=""></p><p>3）logback 分为三个模块：</p><ul><li>logback-core，核心模块，提供了关键的通用机制；</li><li>logback-classic，可以看作是 log4j 的改进版，实现了简单的日志门面 SLF4J；</li><li>logback-access，主要用来和 Servlet 容器交互，比如说 Tomcat，提供了一些 HTTP 访问的功能。</li></ul><p>如果想研究 logback 源码的话，可以按照这三个模块去研究。</p><h2 id="直接上手" tabindex="-1"><a class="header-anchor" href="#直接上手" aria-hidden="true">#</a> 直接上手</h2><p>不废话，直接新建一个空的 Spring Boot 项目，在测试类中加上两行代码。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token annotation punctuation">@SpringBootTest</span>
 <span class="token keyword">class</span> <span class="token class-name">CodingmoreLogbackApplicationTests</span> <span class="token punctuation">{</span>
   <span class="token keyword">static</span> <span class="token class-name">Logger</span> logger <span class="token operator">=</span> <span class="token class-name">LoggerFactory</span><span class="token punctuation">.</span><span class="token function">getLogger</span><span class="token punctuation">(</span><span class="token class-name">CodingmoreLogbackApplicationTests</span><span class="token punctuation">.</span><span class="token keyword">class</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
   <span class="token annotation punctuation">@Test</span>
@@ -53,7 +53,7 @@
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>Logger 和 LoggerFactory 都来自 SLF4J，所以如果项目是从 Log4j + SLF4J 切换到 Logback 的话，此时的代码是零改动的。</p><p>其他什么也不用做，运行后就可以看到 logback 已经正常工作了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/logback-07c6b600-3667-4113-bbd5-5ec25990e9dc.png" alt=""></p><p>在没有配置文件的情况下，一切都是默认的，Logback 的日志信息会输出到控制台。可以通过 StatusPrinter 来打印 Logback 的内部信息：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">LoggerContext</span> lc <span class="token operator">=</span> <span class="token punctuation">(</span><span class="token class-name">LoggerContext</span><span class="token punctuation">)</span><span class="token class-name">LoggerFactory</span><span class="token punctuation">.</span><span class="token function">getILoggerFactory</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 <span class="token class-name">StatusPrinter</span><span class="token punctuation">.</span><span class="token function">print</span><span class="token punctuation">(</span>lc<span class="token punctuation">)</span><span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><p>再次运行测试类，可以在控制台看到以下信息：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/logback-05b134ab-b6e6-4a10-a00c-41b829938618.png" alt=""></p><p>也就是说，Logback 会在 classpath 路径下先寻找 logback-test.xml 文件，没有找到的话，寻找 logback.xml 文件，都找不到的话，就输出到控制台。</p><p>并且，Logger 的默认日志级别是 INFO 级别的，这就意味着如果尝试下面的代码：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code>logger<span class="token punctuation">.</span><span class="token function">debug</span><span class="token punctuation">(</span><span class="token string">&quot;沉默王二是傻 X&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>控制台是看不到这行日志输出的。Logback 的日志级别是这样的：</p><blockquote><p>TRACE &lt; DEBUG &lt; INFO &lt; WARN &lt; ERROR</p></blockquote><p>也就是说小于 INFO 级别的日志都不会记录，只有大于等于 INFO 级别的日志才会被记录。</p><h3 id="编程喵实战项目的日志案例分析" tabindex="-1"><a class="header-anchor" href="#编程喵实战项目的日志案例分析" aria-hidden="true">#</a> 编程喵实战项目的日志案例分析</h3><p>尽管默认配置很有用，但它很可能不能满足我们的实际开发需求，于是我们需要找到一种更优雅的解决方案。</p><p>当 <code>src/main/resources</code> 目录下有以下名称之一的配置文件时，Spring Boot 将自动加载它来作为 Logback 的配置项：</p><ul><li>logback-spring.xml</li><li>logback.xml</li><li>logback-spring.groovy</li><li>logback.groovy</li></ul><p>Spring Boot 建议我们使用 <code>-spring</code> 结尾的配置文件，这样可以使用 Spring Boot 的 Profile 功能（针对不同的环境（开发环境、测试环境、正式环境）提供不同的配置项）。</p><p>编程喵用的是 logback-spring.xml（在 codingmore-admin 项目下可以找得到）：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;!--
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>控制台是看不到这行日志输出的。Logback 的日志级别是这样的：</p><blockquote><p>TRACE &lt; DEBUG &lt; INFO &lt; WARN &lt; ERROR</p></blockquote><p>也就是说小于 INFO 级别的日志都不会记录，只有大于等于 INFO 级别的日志才会被记录。</p><h2 id="编程喵实战项目的日志案例分析" tabindex="-1"><a class="header-anchor" href="#编程喵实战项目的日志案例分析" aria-hidden="true">#</a> 编程喵实战项目的日志案例分析</h2><p>尽管默认配置很有用，但它很可能不能满足我们的实际开发需求，于是我们需要找到一种更优雅的解决方案。</p><p>当 <code>src/main/resources</code> 目录下有以下名称之一的配置文件时，Spring Boot 将自动加载它来作为 Logback 的配置项：</p><ul><li>logback-spring.xml</li><li>logback.xml</li><li>logback-spring.groovy</li><li>logback.groovy</li></ul><p>Spring Boot 建议我们使用 <code>-spring</code> 结尾的配置文件，这样可以使用 Spring Boot 的 Profile 功能（针对不同的环境（开发环境、测试环境、正式环境）提供不同的配置项）。</p><p>编程喵用的是 logback-spring.xml（在 codingmore-admin 项目下可以找得到）：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;!--
 configuration 有三个属性：
 scan：当此属性设置为true时，配置文件如果发生改变，将会被重新加载，默认值为true。
 scanPeriod：设置监测配置文件是否有修改的时间间隔，如果没有给出时间单位，默认单位是毫秒当scan为true时，此属性生效。默认的时间间隔为1分钟。
@@ -163,7 +163,7 @@ debug：当此属性设置为true时，将打印出logback内部日志信息，
         &lt;appender-ref ref=&quot;APPLICATION&quot; /&gt;
     &lt;/root&gt;
 &lt;/configuration&gt;
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>只说几个不同的点。</p><p><code>FILE_LOG_PATTERN</code> 和 <code>CONSOLE_LOG_PATTERN</code> 是在 Spring Boot 中默认定义的。</p><blockquote><p><a href="https://github.com/spring-projects/spring-boot/blob/main/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/logging/logback/DefaultLogbackConfiguration.java" target="_blank" rel="noopener noreferrer">https://github.com/spring-projects/spring-boot/blob/main/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/logging/logback/DefaultLogbackConfiguration.java<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/logback-87217069-b756-4c0c-945e-06ecc5785b81.png" alt=""></p><p>SizeAndTimeBasedRollingPolicy 比 TimeBasedRollingPolicy 多了一个日志文件大小设定的属性：maxFileSize，其他完全一样。</p><p>totalSizeCap，所有日志文件的大小（可选项）。超出这个大小时，旧的日志文件将会被异步删除。需要配合 maxHistory 属性一起使用，并且是第二条件。</p><p>在Intellij IDEA 中启动项目，我们来查看一下配置后的日志效果（控制台中）。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/logback-1a849206-617e-45d5-b199-50787c12e9bc.png" alt=""></p><p>由于我们加了颜色配置，所以控制台日志看起来对眼睛更友好了一些。</p><p>那配置的日志文件在哪里呢？在 <code>user.home</code> 下，如果不确定具体值是什么的话，可以通过 <code>System.getProperty(&quot;user.home&quot;)</code> 获取到。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/logback-bdb8558e-2fd0-488e-9a0a-7c78234eae7a.png" alt=""></p><p>顺着这个路径就可以找到生成的日志文件了，并且日志的生成策略也是符合我们的预期的。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/logback-3e5c5534-470b-4ec4-b5fa-cb2a6fbbaee4.png" alt=""></p><h3 id="使用-lombok-进行日志记录" tabindex="-1"><a class="header-anchor" href="#使用-lombok-进行日志记录" aria-hidden="true">#</a> 使用 lombok 进行日志记录</h3><p>在上面的例子中，我们必须在类中声明一个静态的 Logger 对象才能在需要记录日志的地方使用它。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">static</span> <span class="token class-name">Logger</span> logger <span class="token operator">=</span> <span class="token class-name">LoggerFactory</span><span class="token punctuation">.</span><span class="token function">getLogger</span><span class="token punctuation">(</span><span class="token class-name">CodingmoreLogbackApplicationTests</span><span class="token punctuation">.</span><span class="token keyword">class</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>只说几个不同的点。</p><p><code>FILE_LOG_PATTERN</code> 和 <code>CONSOLE_LOG_PATTERN</code> 是在 Spring Boot 中默认定义的。</p><blockquote><p><a href="https://github.com/spring-projects/spring-boot/blob/main/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/logging/logback/DefaultLogbackConfiguration.java" target="_blank" rel="noopener noreferrer">https://github.com/spring-projects/spring-boot/blob/main/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/logging/logback/DefaultLogbackConfiguration.java<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/logback-87217069-b756-4c0c-945e-06ecc5785b81.png" alt=""></p><p>SizeAndTimeBasedRollingPolicy 比 TimeBasedRollingPolicy 多了一个日志文件大小设定的属性：maxFileSize，其他完全一样。</p><p>totalSizeCap，所有日志文件的大小（可选项）。超出这个大小时，旧的日志文件将会被异步删除。需要配合 maxHistory 属性一起使用，并且是第二条件。</p><p>在Intellij IDEA 中启动项目，我们来查看一下配置后的日志效果（控制台中）。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/logback-1a849206-617e-45d5-b199-50787c12e9bc.png" alt=""></p><p>由于我们加了颜色配置，所以控制台日志看起来对眼睛更友好了一些。</p><p>那配置的日志文件在哪里呢？在 <code>user.home</code> 下，如果不确定具体值是什么的话，可以通过 <code>System.getProperty(&quot;user.home&quot;)</code> 获取到。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/logback-bdb8558e-2fd0-488e-9a0a-7c78234eae7a.png" alt=""></p><p>顺着这个路径就可以找到生成的日志文件了，并且日志的生成策略也是符合我们的预期的。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/logback-3e5c5534-470b-4ec4-b5fa-cb2a6fbbaee4.png" alt=""></p><h2 id="使用-lombok-进行日志记录" tabindex="-1"><a class="header-anchor" href="#使用-lombok-进行日志记录" aria-hidden="true">#</a> 使用 lombok 进行日志记录</h2><p>在上面的例子中，我们必须在类中声明一个静态的 Logger 对象才能在需要记录日志的地方使用它。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">static</span> <span class="token class-name">Logger</span> logger <span class="token operator">=</span> <span class="token class-name">LoggerFactory</span><span class="token punctuation">.</span><span class="token function">getLogger</span><span class="token punctuation">(</span><span class="token class-name">CodingmoreLogbackApplicationTests</span><span class="token punctuation">.</span><span class="token keyword">class</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>这样的样板代码令人生厌！</p><p>我们可以通过 lombok 的方式来解决这个问题，在 pom.xml 文件中加入依赖。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
   &lt;groupId&gt;org.projectlombok&lt;/groupId&gt;
   &lt;artifactId&gt;lombok&lt;/artifactId&gt;
@@ -177,7 +177,7 @@ class CodingmoreLogbackApplicationTests {
     log.info(&quot;沉默王二是个大煞笔&quot;);
   }
 }
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><hr><p>更多内容，只针对《Java 程序员进阶之路》星球用户开放，需要的小伙伴可以<a href="/springboot/docs/zhishixingqiu/" class="">戳链接🔗</a>加入我们的星球，一起学习，一起卷。。<strong>编程喵</strong>🐱是一个 Spring Boot+Vue 的前后端分离项目，融合了市面上绝大多数流行的技术要点。通过学习实战项目，你可以将所学的知识通过实践进行检验、你可以拓宽自己的技术边界，你可以掌握一个真正的实战项目是如何从 0 到 1 的。</p><hr><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/logback-cd491159-e48e-4c74-a67f-7962a45e847f.png" alt=""></p><h3 id="源码路径" tabindex="-1"><a class="header-anchor" href="#源码路径" aria-hidden="true">#</a> 源码路径</h3><blockquote><ul><li>编程喵：<a href="https://github.com/itwanger/coding-more" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/coding-more<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li>Logback 详细配置专用：<a href="https://github.com/itwanger/codingmore-learning/tree/main/codingmore-logback" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/coding-more<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" 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60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span 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-    <script type="module" src="/assets/app.a0271b9c.js" defer></script>
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><hr><p>更多内容，只针对《Java 程序员进阶之路》星球用户开放，需要的小伙伴可以<a href="https://tobebetterjavaer.com/zhishixingqiu/" target="_blank" rel="noopener noreferrer">戳链接🔗<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>加入我们的星球，一起学习，一起卷。。<strong>编程喵</strong>🐱是一个 Spring Boot+Vue 的前后端分离项目，融合了市面上绝大多数流行的技术要点。通过学习实战项目，你可以将所学的知识通过实践进行检验、你可以拓宽自己的技术边界，你可以掌握一个真正的实战项目是如何从 0 到 1 的。</p><hr><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/logback-cd491159-e48e-4c74-a67f-7962a45e847f.png" alt=""></p><h2 id="源码路径" tabindex="-1"><a class="header-anchor" href="#源码路径" aria-hidden="true">#</a> 源码路径</h2><blockquote><ul><li>编程喵：<a href="https://github.com/itwanger/coding-more" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/coding-more<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li>Logback 详细配置专用：<a href="https://github.com/itwanger/codingmore-learning/tree/main/codingmore-logback" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/coding-more<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul></blockquote><p><img 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69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/6/10 下午7:28:25</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: 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diff --git a/dist/springboot/macos-codingmore-run.html b/dist/springboot/macos-codingmore-run.html
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href="/springboot/macos-codingmore-run.html#_01、mysql" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="01、MySQL"><!---->01、MySQL<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/springboot/macos-codingmore-run.html#_02、redis" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="02、Redis"><!---->02、Redis<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/springboot/macos-codingmore-run.html#_03、oss" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="03、OSS"><!---->03、OSS<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/springboot/macos-codingmore-run.html#_04、codingmore-admin" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="04、codingmore-admin"><!---->04、codingmore-admin<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/springboot/macos-codingmore-run.html#_05、codingmore-web" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="05、codingmore-web"><!---->05、codingmore-web<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/springboot/macos-codingmore-run.html#_06、codingmore-admin-web" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="06、codingmore-admin-web"><!---->06、codingmore-admin-web<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li></ul><!--]--></li><li><!--[--><a href="/springboot/windows-codingmore-run.html" class="nav-link sidebar-link sidebar-page" aria-label="Windows下如何运行编程喵源码"><!---->Windows下如何运行编程喵源码<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.5 辅助工具</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.6 开源轮子</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.7 分布式</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.8 消息队列</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->如何在本地（macOS环境）跑起来编程喵（Spring Boot+Vue）项目源码？</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年6月6日</span><meta property="datePublished" content="2022-06-06T15:31:27.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 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19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 8 分钟</span><meta property="timeRequired" content="PT8M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/macos-codingmore-run.html#前置环境的准备" class="router-link-active router-link-exact-active toc-link level2">前置环境的准备</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/macos-codingmore-run.html#下载编程喵-codingmore-源码" class="router-link-active router-link-exact-active toc-link level2">下载编程喵（codingmore）源码</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/macos-codingmore-run.html#部署编程喵-codingmore-源码" class="router-link-active router-link-exact-active toc-link level2">部署编程喵（codingmore）源码</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/macos-codingmore-run.html#_01、mysql" class="router-link-active router-link-exact-active toc-link level3">01、MySQL</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/macos-codingmore-run.html#_02、redis" class="router-link-active router-link-exact-active toc-link level3">02、Redis</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/macos-codingmore-run.html#_03、oss" class="router-link-active router-link-exact-active toc-link level3">03、OSS</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/macos-codingmore-run.html#_04、codingmore-admin" class="router-link-active router-link-exact-active toc-link level3">04、codingmore-admin</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/macos-codingmore-run.html#_05、codingmore-web" class="router-link-active router-link-exact-active toc-link level3">05、codingmore-web</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/macos-codingmore-run.html#_06、codingmore-admin-web" class="router-link-active router-link-exact-active toc-link level3">06、codingmore-admin-web</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h2 id="前置环境的准备" tabindex="-1"><a class="header-anchor" href="#前置环境的准备" aria-hidden="true">#</a> 前置环境的准备</h2><ul><li>一台可以开机的电脑</li><li>JDK 8</li><li>Maven</li><li>Intellij IDEA（非必须，可用 Eclipse）</li><li>Visual Studio Code（非必须，可用 hbuilderx）</li><li>MySQL</li><li>Redis（非必须，会报错，但不影响跑）</li><li>OSS（非必须，上传图片时报错，但不影响跑）</li></ul><p>对，编程喵 🐱（Spring Boot+Vue 的前后端分离项目）要想在本地跑起来，需要这 8 个前置环境。</p><p>第一个条件，一台可以开机的电脑，显然我相信大家都是有的。不然怎么学编程是吧？瞧我这废话真多。</p><p>这篇先以 macOS 为例，Windows 的话，我另开一篇。下图是我的主力机 iMac 的配置。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-d98d5c3c-24a9-4d69-a11d-0b323f0c6bb5.png" alt=""></p><p>第二个条件，JDK 8，可以通过 <a href="https://brew.sh/index_zh-cn" target="_blank" rel="noopener noreferrer">homebrew<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>（macOS 软件包管理器）安装，非常方面，然后用 <a href="https://www.jenv.be/" target="_blank" rel="noopener noreferrer">jenv<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a> 来管理 Java 版本。</p><p>执行 <code>brew -v</code> 可以查看 homebrew 版本</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-ac4ffa12-4b90-459b-a548-bd91e105f531.png" alt=""></p><p>执行 <code>brew install java</code> 可以安装最新版 JDK。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-c80146c8-24f0-40ee-ab6b-696bc4a6589d.png" alt=""></p><p>执行 <code>brew install adoptopenjdk/openjdk/adoptopenjdk8 --cask</code> 可以安装最 JDK 8。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-6a46e999-b309-4adc-9567-ade05f55f174.png" alt=""></p><p>执行 <code>ls /Library/Java/JavaVirtualMachines/</code> 可以查看本机所有安装过的 JDK 包。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-7b8ee4ad-db7d-4cc6-a9bc-323083eb319c.png" alt=""></p><p>通过 <code>jenv add adoptopenjdk-8.jdk/Contents/Home/</code> 可以将安装过的 JDK 加入到 jenv 版本库中。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-f34a88d5-6c50-4eec-8343-77518aaf9a4f.png" alt=""></p><p>执行 <code>jenv global openjdk64-1.8.0.292</code> 可以指定当前的 JDK 版本。再执行 <code>jenv versions</code> 可以查看默认使用的 JDK 版本（带<code>*</code>的）</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-05d7d17f-d214-40c7-98d8-e67083ed38fb.png" alt=""></p><p>执行 <code>java -version</code> 可以查看当前 JDK 版本</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-a1bb43ca-b3b8-4681-b290-6ddbdf2bc1fc.png" alt=""></p><p>第三个条件，Maven，可以直接通过 <code>brew install maven</code> 来完成安装。通过 <code>mvn -v</code> 来查看版本。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-9b4dab03-c720-4f23-8a1e-90fa55130c73.png" alt=""></p><p>为了加快项目依赖包的下载速度，我们需要配置 Maven 的国内镜像源。</p><p>找到 Maven Home（<code>/Users/yourpath/save/apache-maven-3.8.3</code>），复制一份 settings.xml。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-7743fabc-1a49-44a6-8862-1f31c94b0633.png" alt=""></p><p>到 <code>/Users/you/.m2</code> 路径下。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-31580aab-9990-4553-9557-41dbd748f361.png" alt=""></p><p>在 mirrors 节点下添加阿里云镜像地址，并保存。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;mirror&gt;
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sidebar-page" aria-label="整合SpringTask"><!---->整合SpringTask<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/kaiyuan/auto-generator.html" class="nav-link sidebar-link sidebar-page" aria-label="整合MyBatis-Plus AutoGenerator"><!---->整合MyBatis-Plus AutoGenerator<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/springboot/macos-codingmore-run.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="macOS下如何运行编程喵源码"><!---->macOS下如何运行编程喵源码<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/springboot/macos-codingmore-run.html#前置环境的准备" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="前置环境的准备"><!---->前置环境的准备<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/springboot/macos-codingmore-run.html#下载编程喵-codingmore-源码" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="下载编程喵（codingmore）源码"><!---->下载编程喵（codingmore）源码<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/springboot/macos-codingmore-run.html#部署编程喵-codingmore-源码" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="部署编程喵（codingmore）源码"><!---->部署编程喵（codingmore）源码<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/springboot/macos-codingmore-run.html#_01、mysql" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="01、MySQL"><!---->01、MySQL<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/springboot/macos-codingmore-run.html#_02、redis" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="02、Redis"><!---->02、Redis<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/springboot/macos-codingmore-run.html#_03、oss" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="03、OSS"><!---->03、OSS<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/springboot/macos-codingmore-run.html#_04、codingmore-admin" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="04、codingmore-admin"><!---->04、codingmore-admin<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/springboot/macos-codingmore-run.html#_05、codingmore-web" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="05、codingmore-web"><!---->05、codingmore-web<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/springboot/macos-codingmore-run.html#_06、codingmore-admin-web" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="06、codingmore-admin-web"><!---->06、codingmore-admin-web<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li></ul><!--]--></li><li><!--[--><a href="/springboot/windows-codingmore-run.html" class="nav-link sidebar-link sidebar-page" aria-label="Windows下如何运行编程喵源码"><!---->Windows下如何运行编程喵源码<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.5 辅助工具</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.6 开源轮子</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.7 分布式</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.8 消息队列</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->如何在本地（macOS环境）跑起来编程喵（Spring Boot+Vue）项目源码？</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年6月6日</span><meta property="datePublished" content="2022-06-06T15:31:27.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category5" role>Java企业级开发</li><meta property="articleSection" content="Java企业级开发"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag1" role>Spring Boot</li><li class="tag tag2" role>Vue</li></ul><meta property="keywords" content="Spring Boot,Vue"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 8 分钟</span><meta property="timeRequired" content="PT8M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/macos-codingmore-run.html#前置环境的准备" class="router-link-active router-link-exact-active toc-link level2">前置环境的准备</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/macos-codingmore-run.html#下载编程喵-codingmore-源码" class="router-link-active router-link-exact-active toc-link level2">下载编程喵（codingmore）源码</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/macos-codingmore-run.html#部署编程喵-codingmore-源码" class="router-link-active router-link-exact-active toc-link level2">部署编程喵（codingmore）源码</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/macos-codingmore-run.html#_01、mysql" class="router-link-active router-link-exact-active toc-link level3">01、MySQL</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/macos-codingmore-run.html#_02、redis" class="router-link-active router-link-exact-active toc-link level3">02、Redis</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/macos-codingmore-run.html#_03、oss" class="router-link-active router-link-exact-active toc-link level3">03、OSS</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/macos-codingmore-run.html#_04、codingmore-admin" class="router-link-active router-link-exact-active toc-link level3">04、codingmore-admin</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/macos-codingmore-run.html#_05、codingmore-web" class="router-link-active router-link-exact-active toc-link level3">05、codingmore-web</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/macos-codingmore-run.html#_06、codingmore-admin-web" class="router-link-active router-link-exact-active toc-link level3">06、codingmore-admin-web</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h2 id="前置环境的准备" tabindex="-1"><a class="header-anchor" href="#前置环境的准备" aria-hidden="true">#</a> 前置环境的准备</h2><ul><li>一台可以开机的电脑</li><li>JDK 8</li><li>Maven</li><li>Intellij IDEA（非必须，可用 Eclipse）</li><li>Visual Studio Code（非必须，可用 hbuilderx）</li><li>MySQL</li><li>Redis（非必须，会报错，但不影响跑）</li><li>OSS（非必须，上传图片时报错，但不影响跑）</li></ul><p>对，编程喵 🐱（Spring Boot+Vue 的前后端分离项目）要想在本地跑起来，需要这 8 个前置环境。</p><p>第一个条件，一台可以开机的电脑，显然我相信大家都是有的。不然怎么学编程是吧？瞧我这废话真多。</p><p>这篇先以 macOS 为例，Windows 的话，我另开一篇。下图是我的主力机 iMac 的配置。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-d98d5c3c-24a9-4d69-a11d-0b323f0c6bb5.png" alt=""></p><p>第二个条件，JDK 8，可以通过 <a href="https://brew.sh/index_zh-cn" target="_blank" rel="noopener noreferrer">homebrew<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>（macOS 软件包管理器）安装，非常方面，然后用 <a href="https://www.jenv.be/" target="_blank" rel="noopener noreferrer">jenv<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a> 来管理 Java 版本。</p><p>执行 <code>brew -v</code> 可以查看 homebrew 版本</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-ac4ffa12-4b90-459b-a548-bd91e105f531.png" alt=""></p><p>执行 <code>brew install java</code> 可以安装最新版 JDK。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-c80146c8-24f0-40ee-ab6b-696bc4a6589d.png" alt=""></p><p>执行 <code>brew install adoptopenjdk/openjdk/adoptopenjdk8 --cask</code> 可以安装最 JDK 8。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-6a46e999-b309-4adc-9567-ade05f55f174.png" alt=""></p><p>执行 <code>ls /Library/Java/JavaVirtualMachines/</code> 可以查看本机所有安装过的 JDK 包。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-7b8ee4ad-db7d-4cc6-a9bc-323083eb319c.png" alt=""></p><p>通过 <code>jenv add adoptopenjdk-8.jdk/Contents/Home/</code> 可以将安装过的 JDK 加入到 jenv 版本库中。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-f34a88d5-6c50-4eec-8343-77518aaf9a4f.png" alt=""></p><p>执行 <code>jenv global openjdk64-1.8.0.292</code> 可以指定当前的 JDK 版本。再执行 <code>jenv versions</code> 可以查看默认使用的 JDK 版本（带<code>*</code>的）</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-05d7d17f-d214-40c7-98d8-e67083ed38fb.png" alt=""></p><p>执行 <code>java -version</code> 可以查看当前 JDK 版本</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-a1bb43ca-b3b8-4681-b290-6ddbdf2bc1fc.png" alt=""></p><p>第三个条件，Maven，可以直接通过 <code>brew install maven</code> 来完成安装。通过 <code>mvn -v</code> 来查看版本。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-9b4dab03-c720-4f23-8a1e-90fa55130c73.png" alt=""></p><p>为了加快项目依赖包的下载速度，我们需要配置 Maven 的国内镜像源。</p><p>找到 Maven Home（<code>/Users/yourpath/save/apache-maven-3.8.3</code>），复制一份 settings.xml。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-7743fabc-1a49-44a6-8862-1f31c94b0633.png" alt=""></p><p>到 <code>/Users/you/.m2</code> 路径下。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-31580aab-9990-4553-9557-41dbd748f361.png" alt=""></p><p>在 mirrors 节点下添加阿里云镜像地址，并保存。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;mirror&gt;
   &lt;id&gt;alimaven&lt;/id&gt;
   &lt;name&gt;aliyun maven&lt;/name&gt;
 &lt;url&gt;http://maven.aliyun.com/nexus/content/groups/public/&lt;/url&gt;
   &lt;mirrorOf&gt;central&lt;/mirrorOf&gt;
 &lt;/mirror&gt;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>第四个条件，Intellij IDEA，Java 后端开发必备神器，可以安装社区版，也可以安装旗舰版。</p><blockquote><p><a href="https://www.jetbrains.com/zh-cn/idea/download/#section=mac" target="_blank" rel="noopener noreferrer">https://www.jetbrains.com/zh-cn/idea/download/#section=mac<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-556c70fd-c3bc-46af-9d20-d52783ecc1f5.png" alt=""></p><p>第五个条件，Visual Studio Code，在编写前端代码（vue、JavaScript、css 等）时，比 Intellij IDEA 更值得信赖。</p><blockquote><p><a href="https://code.visualstudio.com/" target="_blank" rel="noopener noreferrer">https://code.visualstudio.com/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-8b2d3562-09ec-4a93-b40d-9a06816aa46c.png" alt=""></p><p>第六个条件，MySQL，可以通过 <a href="https://dev.mysql.com/doc/refman/8.0/en/macos-installation-pkg.html" target="_blank" rel="noopener noreferrer">MySQL 官网<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>下载安装包。</p><p>安装完成后，可以通过设置面板看到 MySQL 服务（记住用户名和密码）。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-79175773-ef00-4333-86eb-b2e24dd1c38b.png" alt=""></p><p>点进去可以查看 MySQL 运行状态。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-fc93c46b-2868-4400-8c47-b51a901d38cc.png" alt=""></p><p>第七个条件，Redis，可以直接通过 <code>brew install redis</code> 来完成安装。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-e1b42515-b750-4b74-8d05-832aa0ab1601.png" alt=""></p><p>执行 <code>redis-server</code> 就可以启动 Redis 服务了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-fc207f85-16b8-4943-986f-fb9e20fc8891.png" alt=""></p><p>第八个条件，OSS，主要用来保存图片，可以通过阿里云官方去购买服务，并且创建 Bucket。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-996b9d40-b2da-4fdc-9190-b7992b9a880e.png" alt=""></p><p>然后配置 AccessKey。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-ad8efde7-a420-4fe9-922d-fb63b650e535.png" alt=""></p><p>针对<a href="https://tobebetterjavaer.com/zhishixingqiu/" target="_blank" rel="noopener noreferrer">星球用户<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，我会开放自己的 accessKeyId 和 accessKeySecret，请勿外泄，免得被恶意攻击。</p><h2 id="下载编程喵-codingmore-源码" tabindex="-1"><a class="header-anchor" href="#下载编程喵-codingmore-源码" aria-hidden="true">#</a> 下载编程喵（codingmore）源码</h2><p>编程喵一共有三个仓库，分别是：</p><blockquote><ul><li>coding-more：编程喵 admin 后端 + Web 前后端，地址：<a href="https://github.com/itwanger/coding-more" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/coding-more<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li>codingmore-admin-web：编程喵 admin 前端，地址：<a href="https://github.com/itwanger/codingmore-admin-web" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/codingmore-admin-web<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li>codingmore-learning：编程喵学习教程（手把手），地址：<a href="https://github.com/itwanger/codingmore-learning" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/codingmore-learning<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-649fffb0-e21b-4562-8632-b8c05f8d3557.png" alt=""></p><p>编程喵 🐱 是一个非常纯粹的前后端分离项目，后端用到的技术包括：</p><ul><li>Spring Boot 容器+MVC 框架</li><li>SpringSecurity 认证和授权框架</li><li>MyBatis ORM 框架</li><li>MyBatis-Plus MyBatis 增强工具</li><li>Nginx 静态资源服务器</li><li>Druid 数据库连接池</li><li>OSS 对象存储</li><li>Redis 缓存中间件</li><li>MySQL 关系型数据库</li><li>Swagger-UI 文档生成工具</li><li>Knife4j Swagger 美化增强工具</li><li>Hibernator-Validator 验证框架</li><li>Logback 日志框架</li><li>Lombok 简化对象封装工具</li><li>Hutool Java 工具类库</li></ul><p>前端用到的技术包括：</p><ul><li>Vue 前端框架</li><li>Vue-router 路由框架</li><li>Vuex 全局状态管理框架</li><li>Element 前端 UI 框架</li><li>Axios 前端 HTTP 框架</li><li>Js-cookie cookie 管理工具</li><li>nprogress 进度条控件</li></ul><p><strong>第一步，下载 coding-more 源码</strong>，戳<a href="https://github.com/itwanger/coding-more" target="_blank" rel="noopener noreferrer">链接 🔗<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>进入到该页面。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-53a249f7-2de2-4ed2-95e5-5836fbda8d48.png" alt=""></p><p>第二步，如果安装有 GitHub 桌面版的话，可以点击「open with GitHub desktop」，如果没有安装的话，可以点击「download zip」</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-f8fb39a5-74a3-4558-a827-db8a106b3f7c.png" alt=""></p><p>点击「show in finder」就可以看到编程喵的源码了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-0d9acadb-9129-4a6a-897f-62eb5f20ce0b.png" alt=""></p><p>第三步，通过 Intellij IDEA 导入就可以了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-b6f49fde-ca3e-46a3-a6ac-d8bc8d5ce6cc.png" alt=""></p><p>第一次打开的话，需要稍等片刻，等待 Maven 去下载依赖包。Maven 下载完毕后，项目的结构图如下图所示。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-637a7780-8516-46b6-824a-5b07a218ecda.png" alt=""></p><p>第四步，下载 codingmore-admin-web 源码，戳<a href="https://github.com/itwanger/codingmore-admin-web" target="_blank" rel="noopener noreferrer">链接 🔗<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>进入到该页面。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-5e753b8d-2542-4a6d-bb6d-bdc6313655ad.png" alt=""></p><p>源码下载完毕后，建议通过 VS Code 导入项目，VS Code 对前端项目比 Intellij IDEA 更加友好。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-78d0c9e4-9b36-4544-bc3a-896e2ab05fc0.png" alt=""></p><h2 id="部署编程喵-codingmore-源码" tabindex="-1"><a class="header-anchor" href="#部署编程喵-codingmore-源码" aria-hidden="true">#</a> 部署编程喵（codingmore）源码</h2><h3 id="_01、mysql" tabindex="-1"><a class="header-anchor" href="#_01、mysql" aria-hidden="true">#</a> 01、MySQL</h3><p>第一步，安装 Navicat，这是一个图形化界面的数据库管理工具。</p><p>安装完毕后，输入 MySQL 数据库的用户名和密码，建立本地连接。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-95ba1a08-171a-4ac7-a4e9-c9b7e19f2d84.png" alt=""></p><p>第二步，打开链接，新建数据库 codingmore，导入编程喵的 DB 文件。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-a18bfb6a-ac2f-4160-8421-964235c21824.png" alt=""></p><p>DB 文件放在 coding-more/doc 目录下。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-1117b32b-ab11-4065-8529-6ceb29bfa7b9.png" alt=""></p><p>导入成功后，可以看到目前 codingmore 所用到的 27 个数据库文件，其中 qrtz 开头的是定时任务的持久化表，剩余是编程喵的数据库表文件。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-e9af58ff-d7b0-4494-ab5b-e9fde3e55f9f.png" alt=""></p><p>然后，修改 <code>codingmore-admin/src/main/resources/application-dev.yml</code> 文件中的 spring.datasource.username、password、url 等，该为你本地的用户名、密码和数据库链接地址（Web 管理端）。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-0d1e490c-97e1-45af-80f2-40b0421eed92.png" alt=""></p><p>修改 <code>codingmore-web/src/main/resources/application-dev.yml</code> 文件中的 spring.datasource.username、password、url 等，该为你本地的用户名、密码和数据库链接地址（Web 前端）。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-bfb6a10d-6899-40cf-8e28-4da74e3e5d14.png" alt=""></p><h3 id="_02、redis" tabindex="-1"><a class="header-anchor" href="#_02、redis" aria-hidden="true">#</a> 02、Redis</h3><p>执行 <code>redis-server</code> 启动 Redis 服务即可，不需要额外配置。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-05a36a7d-449b-49a9-a8da-dc44395b1e66.png" alt=""></p><p>记住 PID，如果想关闭的话，使用 <code>kill -9 PID</code> 大法就可以了。</p><p>然后，修改 <code>codingmore-admin/src/main/resources/application-dev.yml</code> 文件中的 spring.redis.host、database、port、password、timeout 等，该为你本地的 Redis 链接信息，一般默认就好（Web 管理端）。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-f4270304-8666-4185-a271-cf803527e08e.png" alt=""></p><p>修改 <code>codingmore-web/src/main/resources/application-dev.yml</code> 文件中的 spring.redis.host、database、port、password、timeout 等，该为你本地的 Redis 链接信息，一般默认就好（Web 前端）。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-325ec5ae-a9ab-445a-a9e7-2446a79e6b23.png" alt=""></p><h3 id="_03、oss" tabindex="-1"><a class="header-anchor" href="#_03、oss" aria-hidden="true">#</a> 03、OSS</h3><p>非<a href="https://tobebetterjavaer.com/zhishixingqiu/" target="_blank" rel="noopener noreferrer">星球用户<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>需要自己购买阿里云的 OSS 服务和 CDN 服务。<a href="https://tobebetterjavaer.com/zhishixingqiu/" target="_blank" rel="noopener noreferrer">星球用户<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>可以直接私信我获取 accessKeyId 和 accessKeySecret。</p><p>然后修改 <code>codingmore-admin/src/main/resources/application-dev.yml</code> 文件中的 aliyun.cdn、oss 等。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-fc8d8cf3-a03f-42cb-ac75-e0909337c8e7.png" alt=""></p><h3 id="_04、codingmore-admin" tabindex="-1"><a class="header-anchor" href="#_04、codingmore-admin" aria-hidden="true">#</a> 04、codingmore-admin</h3><p>在 Intellij IDEA 中运行 CodingmoreAdminBootstrap 主类，启动管理端后台服务。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-2a95c98a-2d6e-451e-a732-3633b36245c2.png" alt=""></p><p>如果启动失败，可以尝试在 Maven 面板中选择 codingmore-admin 双击运行 clean 清除缓存。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-bec7e7f4-57ca-4ece-8b85-97c567ed4e56.png" alt=""></p><h3 id="_05、codingmore-web" tabindex="-1"><a class="header-anchor" href="#_05、codingmore-web" aria-hidden="true">#</a> 05、codingmore-web</h3><p>在 Intellij IDEA 中运行 CodingmoreAdminBootstrap 主类，启动管理端后台服务。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-ae72896f-4968-4f66-bbcd-3aadbe610581.png" alt=""></p><p>如果启动失败，可以尝试在 Maven 面板中选择 codingmore-web 双击运行 clean 清除缓存。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-ef0a5c64-875f-41a5-8060-552aedc245a6.png" alt=""></p><p>启动后，可以直接在浏览器地址栏输入 <code>http://localhost:8081</code> 访问 Web 前端。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-6da911d2-e510-4dc2-b884-02f08f43cfba.png" alt=""></p><h3 id="_06、codingmore-admin-web" tabindex="-1"><a class="header-anchor" href="#_06、codingmore-admin-web" aria-hidden="true">#</a> 06、codingmore-admin-web</h3><p>打开终端，执行 <code>yarn install</code> 添加项目依赖（yarn 是 Facebook 为 node.js 运行时环境开发软件打包工具，是 npm 软件包管理器的替代品）。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-5f93f909-f671-4363-b64c-72e702af3715.png" alt=""></p><p>之后执行 <code>yarn run dev</code> 编译 admin 前端。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-3a0b8906-d3cd-4771-9f0c-28fe2f8046a9.png" alt=""></p><p>在浏览器地址栏输入 <code>http://localhost:8080</code> 就可以访问到了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-d2afa887-ebbe-4107-8106-9effcdf15e85.png" alt=""></p><p>可以点击「获取体验账号」的方式获取登录用户名和密码。当然了，你也可以直接在 users 表上暴力破解密码。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-10a4a4f6-a18b-4394-8e9d-ba107f37cb69.png" alt=""></p><p><a href="https://tobebetterjavaer.com/zhishixingqiu/" target="_blank" rel="noopener noreferrer">星球用户<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>可以直接私信我获取超级管理员的密码。登录后就可以看到文章列表啦。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-fc38e67c-05a0-4895-a761-391465986797.png" alt=""></p><p>这是文章编辑页，是不是非常清爽？</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/macos-codingmore-run-b00a46e0-2537-4dd4-a107-c4632886a430.png" alt=""></p><p>好了，Mac 版如何下载编程喵源码，如何在本地跑起来编程喵的服务就告一段落辣，我们回头见！</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/springboot/macos-codingmore-run.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" 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content="PT7M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/mysql-druid.html#mysql-简介" class="router-link-active router-link-exact-active toc-link level3">MySQL 简介</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/mysql-druid.html#如何安装-mysql" class="router-link-active router-link-exact-active toc-link level3">如何安装 MySQL</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/mysql-druid.html#spring-boot-整合-mysql-数据库" class="router-link-active router-link-exact-active toc-link level3">Spring Boot 整合 MySQL 数据库</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/mysql-druid.html#如何通过-navicat-连接-mysql" class="router-link-active router-link-exact-active toc-link level3">如何通过 Navicat 连接 MySQL</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/mysql-druid.html#如何通过-intellij-idea-连接-mysql" class="router-link-active router-link-exact-active toc-link level3">如何通过 Intellij IDEA 连接 MySQL</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/mysql-druid.html#spring-boot-整合-druid" class="router-link-active router-link-exact-active toc-link level3">Spring Boot 整合 Druid</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/mysql-druid.html#源码地址" class="router-link-active router-link-exact-active toc-link level3">源码地址</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h3 id="mysql-简介" tabindex="-1"><a class="header-anchor" href="#mysql-简介" aria-hidden="true">#</a> MySQL 简介</h3><p>MySQL 是目前项目中运用最广泛的关系型数据库，无论是互联网大厂，还是中小型公司，几乎都在用。</p><p>MySQL 体积小、速度快、源码开放，所以广受开发者喜爱。</p><p>MySQL 的安装非常简单，针对不同的操作系统，MySQL 都提供了安装包的下载。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/mysql-druid-f75e7dfe-7dc2-43b2-94d1-68ff775cd2ed.png" alt=""></p><p>MySQL 目前主推的版本是 8.0，参考手册的地址如下所示：</p><blockquote><p><a href="https://dev.mysql.com/doc/refman/8.0/en/" target="_blank" rel="noopener noreferrer">https://dev.mysql.com/doc/refman/8.0/en/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><h3 id="如何安装-mysql" tabindex="-1"><a class="header-anchor" href="#如何安装-mysql" aria-hidden="true">#</a> 如何安装 MySQL</h3><p>如果有云服务器的话，建议安装在云服务器上，这样就可以长时间运行 MySQL 而不用担心服务重启的问题。按照步骤参照下面的文档。</p><blockquote><p><a href="https://dev.mysql.com/doc/refman/8.0/en/linux-installation.html" target="_blank" rel="noopener noreferrer">https://dev.mysql.com/doc/refman/8.0/en/linux-installation.html<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>也可以直接通过宝塔面板的形式来安装，这样更省事省力省心。</p><blockquote><p>宝塔面板安装脚本地址：<a href="https://www.bt.cn/new/download.html" target="_blank" rel="noopener noreferrer">https://www.bt.cn/new/download.html<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/mysql-druid-89f6d126-b059-4511-b64d-720aa8df354f.png" alt=""></p><p>安装完成后，就可以在数据库管理页面添加数据库并且进行管理了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/mysql-druid-86d80ab6-968e-42ec-a532-1eeb341779c1.png" alt=""></p><p>如果是 Windows 用户的话，安装步骤参照下面的文档。</p><blockquote><p><a href="https://dev.mysql.com/doc/refman/8.0/en/windows-installation.html" target="_blank" rel="noopener noreferrer">https://dev.mysql.com/doc/refman/8.0/en/windows-installation.html<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>如果是 macOS 用户的话，安装步骤参照下面的文档。</p><blockquote><p><a href="https://dev.mysql.com/doc/refman/8.0/en/macos-installation-pkg.html" target="_blank" rel="noopener noreferrer">https://dev.mysql.com/doc/refman/8.0/en/macos-installation-pkg.html<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>Windows 和 macOS 的安装都非常的简单，主要就是下载对应操作系统的 MySQL 包安装管理器。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/mysql-druid-ab94f6df-2031-42ff-8746-b4ad5a4e3a81.png" alt=""></p><p>然后按照包安装向导的提示一步步傻瓜式安装即可。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/mysql-druid-e7031aec-74c5-4079-a6f3-97368c921620.png" alt=""></p><h3 id="spring-boot-整合-mysql-数据库" tabindex="-1"><a class="header-anchor" href="#spring-boot-整合-mysql-数据库" aria-hidden="true">#</a> Spring Boot 整合 MySQL 数据库</h3><p>Spring Boot 整合 MySQL 数据库非常简单，只需要添加 MySQL 依赖并在配置文件中添加数据库配置即可。我们可以不用编写原始的访问数据库的代码，也不用调用 JDBC 或者连接池就可以访问 MySQL。</p><p>1）使用 Intellij IDEA 新建一个 Spring Boot 项目，使用 Java 8 版本「社区版没有此功能，需要到 (Spring initializr)[https://start.spring.io/]）生成项目后导入，推荐使用旗舰版，功能更加强大」。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/mysql-druid-d7765111-9dcb-4125-a87a-da1439a0a6cf.png" alt=""></p><p>添加 MySQL 的 Java连接驱动依赖和 JDBC Starter。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/mysql-druid-201eb6fa-0a09-46d7-a555-3988bee92a9f.png" alt=""></p><p>对应pom.xml文件中的代码：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
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sidebar-page" aria-label="整合Knife4j"><!---->整合Knife4j<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/springboot/springtask.html" class="nav-link sidebar-link sidebar-page" aria-label="整合SpringTask"><!---->整合SpringTask<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/kaiyuan/auto-generator.html" class="nav-link sidebar-link sidebar-page" aria-label="整合MyBatis-Plus AutoGenerator"><!---->整合MyBatis-Plus AutoGenerator<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/springboot/macos-codingmore-run.html" class="nav-link sidebar-link sidebar-page" aria-label="macOS下如何运行编程喵源码"><!---->macOS下如何运行编程喵源码<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/springboot/windows-codingmore-run.html" class="nav-link sidebar-link sidebar-page" aria-label="Windows下如何运行编程喵源码"><!---->Windows下如何运行编程喵源码<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.5 辅助工具</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.6 开源轮子</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.7 分布式</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.8 消息队列</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Spring Boot 整合 MySQL 和 Druid</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年5月5日</span><meta property="datePublished" content="2022-05-05T10:49:43.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 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class="toc-item"><a aria-current="page" href="/springboot/mysql-druid.html#如何安装-mysql" class="router-link-active router-link-exact-active toc-link level2">如何安装 MySQL</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/mysql-druid.html#spring-boot-整合-mysql-数据库" class="router-link-active router-link-exact-active toc-link level2">Spring Boot 整合 MySQL 数据库</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/mysql-druid.html#如何通过-navicat-连接-mysql" class="router-link-active router-link-exact-active toc-link level2">如何通过 Navicat 连接 MySQL</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/mysql-druid.html#如何通过-intellij-idea-连接-mysql" class="router-link-active router-link-exact-active toc-link level2">如何通过 Intellij IDEA 连接 MySQL</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/mysql-druid.html#spring-boot-整合-druid" class="router-link-active router-link-exact-active toc-link level2">Spring Boot 整合 Druid</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/mysql-druid.html#源码地址" class="router-link-active router-link-exact-active toc-link level2">源码地址</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h2 id="mysql-简介" tabindex="-1"><a class="header-anchor" href="#mysql-简介" aria-hidden="true">#</a> MySQL 简介</h2><p>MySQL 是目前项目中运用最广泛的关系型数据库，无论是互联网大厂，还是中小型公司，几乎都在用。</p><p>MySQL 体积小、速度快、源码开放，所以广受开发者喜爱。</p><p>MySQL 的安装非常简单，针对不同的操作系统，MySQL 都提供了安装包的下载。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/mysql-druid-f75e7dfe-7dc2-43b2-94d1-68ff775cd2ed.png" alt=""></p><p>MySQL 目前主推的版本是 8.0，参考手册的地址如下所示：</p><blockquote><p><a href="https://dev.mysql.com/doc/refman/8.0/en/" target="_blank" rel="noopener noreferrer">https://dev.mysql.com/doc/refman/8.0/en/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><h2 id="如何安装-mysql" tabindex="-1"><a class="header-anchor" href="#如何安装-mysql" aria-hidden="true">#</a> 如何安装 MySQL</h2><p>如果有云服务器的话，建议安装在云服务器上，这样就可以长时间运行 MySQL 而不用担心服务重启的问题。按照步骤参照下面的文档。</p><blockquote><p><a href="https://dev.mysql.com/doc/refman/8.0/en/linux-installation.html" target="_blank" rel="noopener noreferrer">https://dev.mysql.com/doc/refman/8.0/en/linux-installation.html<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>也可以直接通过宝塔面板的形式来安装，这样更省事省力省心。</p><blockquote><p>宝塔面板安装脚本地址：<a href="https://www.bt.cn/new/download.html" target="_blank" rel="noopener noreferrer">https://www.bt.cn/new/download.html<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/mysql-druid-89f6d126-b059-4511-b64d-720aa8df354f.png" alt=""></p><p>安装完成后，就可以在数据库管理页面添加数据库并且进行管理了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/mysql-druid-86d80ab6-968e-42ec-a532-1eeb341779c1.png" alt=""></p><p>如果是 Windows 用户的话，安装步骤参照下面的文档。</p><blockquote><p><a href="https://dev.mysql.com/doc/refman/8.0/en/windows-installation.html" target="_blank" rel="noopener noreferrer">https://dev.mysql.com/doc/refman/8.0/en/windows-installation.html<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>如果是 macOS 用户的话，安装步骤参照下面的文档。</p><blockquote><p><a href="https://dev.mysql.com/doc/refman/8.0/en/macos-installation-pkg.html" target="_blank" rel="noopener noreferrer">https://dev.mysql.com/doc/refman/8.0/en/macos-installation-pkg.html<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>Windows 和 macOS 的安装都非常的简单，主要就是下载对应操作系统的 MySQL 包安装管理器。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/mysql-druid-ab94f6df-2031-42ff-8746-b4ad5a4e3a81.png" alt=""></p><p>然后按照包安装向导的提示一步步傻瓜式安装即可。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/mysql-druid-e7031aec-74c5-4079-a6f3-97368c921620.png" alt=""></p><h2 id="spring-boot-整合-mysql-数据库" tabindex="-1"><a class="header-anchor" href="#spring-boot-整合-mysql-数据库" aria-hidden="true">#</a> Spring Boot 整合 MySQL 数据库</h2><p>Spring Boot 整合 MySQL 数据库非常简单，只需要添加 MySQL 依赖并在配置文件中添加数据库配置即可。我们可以不用编写原始的访问数据库的代码，也不用调用 JDBC 或者连接池就可以访问 MySQL。</p><p>1）使用 Intellij IDEA 新建一个 Spring Boot 项目，使用 Java 8 版本「社区版没有此功能，需要到 (Spring initializr)[https://start.spring.io/]）生成项目后导入，推荐使用旗舰版，功能更加强大」。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/mysql-druid-d7765111-9dcb-4125-a87a-da1439a0a6cf.png" alt=""></p><p>添加 MySQL 的 Java连接驱动依赖和 JDBC Starter。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/mysql-druid-201eb6fa-0a09-46d7-a555-3988bee92a9f.png" alt=""></p><p>对应pom.xml文件中的代码：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
     &lt;groupId&gt;mysql&lt;/groupId&gt;
     &lt;artifactId&gt;mysql-connector-java&lt;/artifactId&gt;
     &lt;scope&gt;runtime&lt;/scope&gt;
@@ -110,12 +110,12 @@ COMMIT;
         log<span class="token punctuation">.</span><span class="token function">info</span><span class="token punctuation">(</span><span class="token string">&quot;用户{}&quot;</span><span class="token punctuation">,</span>users<span class="token punctuation">)</span><span class="token punctuation">;</span>
     <span class="token punctuation">}</span>
 <span class="token punctuation">}</span>
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>Spring Boot 的测试类主要放置在 <code>src/test/java</code> 目录下面，项目创建成功后，Spring Boot 会根据项目名称自动为我们生成测试类。</p><p>比如说本次项目名为 codingmore-mysql，那么测试类名为 CodingmoreMysqlApplicationTests。</p><p><code>@SpringBootTest</code> 注解能够测试我们的项目主类，该项目为 CodingmoreMysqlApplication。</p><p><code>@Test</code> 注解是 junit 单元测试的注解，表示该方法为测试方法。</p><p><code>JdbcTemplate</code> 一个通过 JDBC 连接数据库的工具类，spring-boot-starter-jdbc 依赖中包含了该类。</p><p><code>@Resource</code> 注解会帮我们在 Spring Boot 启动的时候注入一个 JdbcTemplate 的对象。</p><p><code>jdbcTemplate.query()</code> 方法通过 SQL 语句和匿名内部类参数的形式，执行 SQL 并查询结果集。</p><p><code>RowMapper</code> 就是查询到的每一行数据对象，我们可以通过重写 mapRow 方法将数据结果集封装到 User 对象上。</p><p>右键菜单运行 testMysql 方法就可以在日志中看到 SQL 执行的结果。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/mysql-druid-92a53c8e-e99a-4ca6-8ad1-f5ec4653da3b.png" alt=""></p><h3 id="如何通过-navicat-连接-mysql" tabindex="-1"><a class="header-anchor" href="#如何通过-navicat-连接-mysql" aria-hidden="true">#</a> 如何通过 Navicat 连接 MySQL</h3><p>Navicat 是一个从我参加工作到现在一直都在用的 MySQL 客户端工具，通过 Navicat 可以轻松连接数据库，并执行增删改查操作。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/mysql-druid-2daef9fc-4a97-41bb-bd1c-875f468d90bc.png" alt=""></p><p>连接数据库也非常的简单，只需要填写主机 IP 地址、端口、用户名和密码即可。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/mysql-druid-18d120ea-0f84-4ca0-b0fd-020587e43fc4.png" alt=""></p><h3 id="如何通过-intellij-idea-连接-mysql" tabindex="-1"><a class="header-anchor" href="#如何通过-intellij-idea-连接-mysql" aria-hidden="true">#</a> 如何通过 Intellij IDEA 连接 MySQL</h3><p>除了 Navicat，还可以使用 Intellij IDEA 直连 MySQL。</p><p>点击「database」面板，在左上角选择 + 号，选择 DataSource，再选择 MySQL。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/mysql-druid-070ab8b8-0629-4238-b35d-438dbcbb130e.png" alt=""></p><p>在弹出面板中填写连接信息。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/mysql-druid-29ba218a-7528-49bf-b2da-c5fa48b40d2b.png" alt=""></p><p>如果是第一次连接 MySQL 的话，记得点击「download」下载 MySQL 驱动，之后点击「test connection」测试是否链接成功，如果出现以下界面，则表示 OK。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/mysql-druid-1b86d117-412c-47a2-82c8-c22f9bcf6455.png" alt=""></p><p>选择右侧的数据库表，双击，就可以查看到数据了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/mysql-druid-8c0288ae-ee22-4983-8d91-7ed7125b17a5.png" alt=""></p><p>在「console」SQL 查询面板里可以编写 SQL 语句来执行增删改查操作。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/mysql-druid-e1c9e85c-382a-40a8-a4fa-3fe32ee612fb.png" alt=""></p><h3 id="spring-boot-整合-druid" tabindex="-1"><a class="header-anchor" href="#spring-boot-整合-druid" aria-hidden="true">#</a> Spring Boot 整合 Druid</h3><p>Druid 是阿里巴巴开源的一款数据库连接池，结合了C3P0、DBCP 等 DB 池的优点，同时还加入了日志监控。</p><p>Druid 在 GitHub 上已经收获了 25.4k 的 star，可以说非常的知名，从简介上也能看得出，Druid 就是为了监控而生的。</p><blockquote><p><a href="https://github.com/alibaba/druid/" target="_blank" rel="noopener noreferrer">https://github.com/alibaba/druid/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/mysql-druid-a1f53d5b-1048-4707-bebc-1a59d7793880.png" alt=""></p><p>Druid 包含了三个重要的组成部分：</p><ul><li>DruidDriver，能够提供基于 Filter-Chain 模式的插件体系；</li><li>DruidDataSource，高效可管理的数据库连接池；</li><li>SQLParser，支持所有 JDBC 兼容的数据库，包括 Oracle、MySQL 等。</li></ul><p>Spring Boot2.0 以上默认使用的是 Hikari 连接池，我们从之前的日志信息里就可以看得到。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/mysql-druid-0982b47e-b211-41a6-ab88-355e1d2ae7be.png" alt=""></p><p>那如果我们想使用 Druid 的话，该怎么整合呢？</p><p>这次我们直接在编程喵项目后端项目 codingmore-admin 上进行修改。</p><p>第一步，在 pom.xml 文件中添加 Druid 的依赖，官方已经提供了 starter，我们直接使用。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>Spring Boot 的测试类主要放置在 <code>src/test/java</code> 目录下面，项目创建成功后，Spring Boot 会根据项目名称自动为我们生成测试类。</p><p>比如说本次项目名为 codingmore-mysql，那么测试类名为 CodingmoreMysqlApplicationTests。</p><p><code>@SpringBootTest</code> 注解能够测试我们的项目主类，该项目为 CodingmoreMysqlApplication。</p><p><code>@Test</code> 注解是 junit 单元测试的注解，表示该方法为测试方法。</p><p><code>JdbcTemplate</code> 一个通过 JDBC 连接数据库的工具类，spring-boot-starter-jdbc 依赖中包含了该类。</p><p><code>@Resource</code> 注解会帮我们在 Spring Boot 启动的时候注入一个 JdbcTemplate 的对象。</p><p><code>jdbcTemplate.query()</code> 方法通过 SQL 语句和匿名内部类参数的形式，执行 SQL 并查询结果集。</p><p><code>RowMapper</code> 就是查询到的每一行数据对象，我们可以通过重写 mapRow 方法将数据结果集封装到 User 对象上。</p><p>右键菜单运行 testMysql 方法就可以在日志中看到 SQL 执行的结果。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/mysql-druid-92a53c8e-e99a-4ca6-8ad1-f5ec4653da3b.png" alt=""></p><h2 id="如何通过-navicat-连接-mysql" tabindex="-1"><a class="header-anchor" href="#如何通过-navicat-连接-mysql" aria-hidden="true">#</a> 如何通过 Navicat 连接 MySQL</h2><p>Navicat 是一个从我参加工作到现在一直都在用的 MySQL 客户端工具，通过 Navicat 可以轻松连接数据库，并执行增删改查操作。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/mysql-druid-2daef9fc-4a97-41bb-bd1c-875f468d90bc.png" alt=""></p><p>连接数据库也非常的简单，只需要填写主机 IP 地址、端口、用户名和密码即可。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/mysql-druid-18d120ea-0f84-4ca0-b0fd-020587e43fc4.png" alt=""></p><h2 id="如何通过-intellij-idea-连接-mysql" tabindex="-1"><a class="header-anchor" href="#如何通过-intellij-idea-连接-mysql" aria-hidden="true">#</a> 如何通过 Intellij IDEA 连接 MySQL</h2><p>除了 Navicat，还可以使用 Intellij IDEA 直连 MySQL。</p><p>点击「database」面板，在左上角选择 + 号，选择 DataSource，再选择 MySQL。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/mysql-druid-070ab8b8-0629-4238-b35d-438dbcbb130e.png" alt=""></p><p>在弹出面板中填写连接信息。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/mysql-druid-29ba218a-7528-49bf-b2da-c5fa48b40d2b.png" alt=""></p><p>如果是第一次连接 MySQL 的话，记得点击「download」下载 MySQL 驱动，之后点击「test connection」测试是否链接成功，如果出现以下界面，则表示 OK。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/mysql-druid-1b86d117-412c-47a2-82c8-c22f9bcf6455.png" alt=""></p><p>选择右侧的数据库表，双击，就可以查看到数据了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/mysql-druid-8c0288ae-ee22-4983-8d91-7ed7125b17a5.png" alt=""></p><p>在「console」SQL 查询面板里可以编写 SQL 语句来执行增删改查操作。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/mysql-druid-e1c9e85c-382a-40a8-a4fa-3fe32ee612fb.png" alt=""></p><h2 id="spring-boot-整合-druid" tabindex="-1"><a class="header-anchor" href="#spring-boot-整合-druid" aria-hidden="true">#</a> Spring Boot 整合 Druid</h2><p>Druid 是阿里巴巴开源的一款数据库连接池，结合了C3P0、DBCP 等 DB 池的优点，同时还加入了日志监控。</p><p>Druid 在 GitHub 上已经收获了 25.4k 的 star，可以说非常的知名，从简介上也能看得出，Druid 就是为了监控而生的。</p><blockquote><p><a href="https://github.com/alibaba/druid/" target="_blank" rel="noopener noreferrer">https://github.com/alibaba/druid/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/mysql-druid-a1f53d5b-1048-4707-bebc-1a59d7793880.png" alt=""></p><p>Druid 包含了三个重要的组成部分：</p><ul><li>DruidDriver，能够提供基于 Filter-Chain 模式的插件体系；</li><li>DruidDataSource，高效可管理的数据库连接池；</li><li>SQLParser，支持所有 JDBC 兼容的数据库，包括 Oracle、MySQL 等。</li></ul><p>Spring Boot2.0 以上默认使用的是 Hikari 连接池，我们从之前的日志信息里就可以看得到。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/mysql-druid-0982b47e-b211-41a6-ab88-355e1d2ae7be.png" alt=""></p><p>那如果我们想使用 Druid 的话，该怎么整合呢？</p><p>这次我们直接在编程喵项目后端项目 codingmore-admin 上进行修改。</p><p>第一步，在 pom.xml 文件中添加 Druid 的依赖，官方已经提供了 starter，我们直接使用。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
     &lt;groupId&gt;com.alibaba&lt;/groupId&gt;
     &lt;artifactId&gt;druid-spring-boot-starter&lt;/artifactId&gt;
     &lt;version&gt;1.1.23&lt;/version&gt;
 &lt;/dependency&gt;
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>第二步，在 application.yml 文件中添加 Druid 配置。</p><hr><p>更多内容，只针对《Java 程序员进阶之路》星球用户开放，需要的小伙伴可以<a href="/springboot/docs/zhishixingqiu/" class="">戳链接🔗</a>加入我们的星球，一起学习，一起卷。。<strong>编程喵</strong>🐱是一个 Spring Boot+Vue 的前后端分离项目，融合了市面上绝大多数流行的技术要点。通过学习实战项目，你可以将所学的知识通过实践进行检验、你可以拓宽自己的技术边界，你可以掌握一个真正的实战项目是如何从 0 到 1 的。</p><hr><h3 id="源码地址" tabindex="-1"><a class="header-anchor" href="#源码地址" aria-hidden="true">#</a> 源码地址</h3><blockquote><ul><li>编程喵 GitHub：<a href="https://github.com/itwanger/coding-more" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/coding-more<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li>codingmore-learn：<a href="https://github.com/itwanger/codingmore-learning" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/codingmore-learning<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul></blockquote><hr><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/springboot/mysql-druid.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/22 上午12:06:08</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/springboot/initializr.html" class="nav-link prev" aria-label="搭建第一个Spring Boot项目"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->搭建第一个Spring Boot项目</div></a><a href="/springboot/jpa.html" class="nav-link next" aria-label="整合JPA"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">整合JPA<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div 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-    <script type="module" src="/assets/app.a0271b9c.js" defer></script>
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>第二步，在 application.yml 文件中添加 Druid 配置。</p><hr><p>更多内容，只针对《Java 程序员进阶之路》星球用户开放，需要的小伙伴可以<a href="https://tobebetterjavaer.com/zhishixingqiu/" target="_blank" rel="noopener noreferrer">戳链接🔗<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>加入我们的星球，一起学习，一起卷。。<strong>编程喵</strong>🐱是一个 Spring Boot+Vue 的前后端分离项目，融合了市面上绝大多数流行的技术要点。通过学习实战项目，你可以将所学的知识通过实践进行检验、你可以拓宽自己的技术边界，你可以掌握一个真正的实战项目是如何从 0 到 1 的。</p><hr><h2 id="源码地址" tabindex="-1"><a class="header-anchor" href="#源码地址" aria-hidden="true">#</a> 源码地址</h2><blockquote><ul><li>编程喵 GitHub：<a href="https://github.com/itwanger/coding-more" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/coding-more<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li>codingmore-mysql-druid：<a href="https://github.com/itwanger/codingmore-learning/tree/main/codingmore-mysql" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/codingmore-learning<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul></blockquote><hr><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/springboot/mysql-druid.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/6/10 下午7:28:25</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/springboot/initializr.html" class="nav-link prev" aria-label="搭建第一个Spring Boot项目"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->搭建第一个Spring Boot项目</div></a><a href="/springboot/jpa.html" class="nav-link next" aria-label="整合JPA"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">整合JPA<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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diff --git a/dist/springboot/oss.html b/dist/springboot/oss.html
index 2f550971..52055dbf 100644
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href="/springboot/oss.html#四、利用-oss-进行自动转链" class="router-link-active router-link-exact-active toc-link level3">四、利用 OSS 进行自动转链</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/oss.html#五、小结" class="router-link-active router-link-exact-active toc-link level3">五、小结</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="崩溃-我带的实习生竟然把图片直接存到了服务器上" tabindex="-1"><a class="header-anchor" href="#崩溃-我带的实习生竟然把图片直接存到了服务器上" aria-hidden="true">#</a> 崩溃！我带的实习生竟然把图片直接存到了服务器上！</h1><p>小二是新来的实习生，作为技术 leader，我给他安排了一个非常简单的练手任务，把前端 markdown 编辑器里上传的图片保存到服务器端，结果他真的就把图片直接保存到了服务器上，这下可把我气坏了，就不能搞个对象存储服务，比如说 OSS、MinIO？</p><p>他理直气壮地反驳道：“谁让你不讲清楚，我去找老板把你开掉！”我瞬间就怂了，说，“来来来，我手把手教你怎么把图片保存到 OSS 上，好不好？”</p><p>“不用了，还是我来教你吧。”小二非常自信，下面是他在 Spring Boot 应用中整合 OSS 做的记录。</p><p>特此声明：阿里云 OSS 的产品负责人看到后请自觉过来结算下推广费用（狗头）。真心讲：Spring Boot+OSS 在实际开发中挺常见的。</p><h3 id="一、开通-oss" tabindex="-1"><a class="header-anchor" href="#一、开通-oss" aria-hidden="true">#</a> 一、开通 OSS</h3><p>OSS 也就是 Object Storage Service，是阿里云提供的一套对象存储服务，国内的竞品还有七牛云的 Kodo和腾讯云的COS。</p><p>第一步，登录阿里云官网，搜索“OSS”关键字，进入 OSS 产品页。</p><p>第二步，如果是 OSS 新用户的话，可以享受 6 个月的新人专享优惠价，不过续费的时候还是会肉疼。</p><p>第三步，进入 OSS 管理控制台，点击「Bucket 列表」，点击「创建 Bucket」。</p><p><img src="https://img-blog.csdnimg.cn/img_convert/90545c542bb7576f37d3e7d214d65ea2.png" alt=""></p><p>Bucket 的词面意思是桶，这里指存储空间，就是用于存储对象的容器。注意读写权限为“公共读”，也就是允许互联网用户访问云空间上的图片。</p><p>第四步，点击「确定」就算是开通成功了。</p><h3 id="二、整合-oss" tabindex="-1"><a class="header-anchor" href="#二、整合-oss" aria-hidden="true">#</a> 二、整合 OSS</h3><p>第一步，在 pom.xml 文件中添加 OSS 的依赖。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;!-- 阿里云 OSS --&gt;
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class="router-link-active router-link-exact-active toc-link level3">一、开通 OSS</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/oss.html#二、整合-oss" class="router-link-active router-link-exact-active toc-link level3">二、整合 OSS</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/oss.html#三、拉取前端代码来测试-oss-上传接口" class="router-link-active router-link-exact-active toc-link level3">三、拉取前端代码来测试 OSS 上传接口</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/oss.html#四、利用-oss-进行自动转链" class="router-link-active router-link-exact-active toc-link level3">四、利用 OSS 进行自动转链</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/oss.html#五、小结" class="router-link-active router-link-exact-active toc-link level3">五、小结</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="崩溃-我带的实习生竟然把图片直接存到了服务器上" tabindex="-1"><a class="header-anchor" href="#崩溃-我带的实习生竟然把图片直接存到了服务器上" aria-hidden="true">#</a> 崩溃！我带的实习生竟然把图片直接存到了服务器上！</h1><p>小二是新来的实习生，作为技术 leader，我给他安排了一个非常简单的练手任务，把前端 markdown 编辑器里上传的图片保存到服务器端，结果他真的就把图片直接保存到了服务器上，这下可把我气坏了，就不能搞个对象存储服务，比如说 OSS、MinIO？</p><p>他理直气壮地反驳道：“谁让你不讲清楚，我去找老板把你开掉！”我瞬间就怂了，说，“来来来，我手把手教你怎么把图片保存到 OSS 上，好不好？”</p><p>“不用了，还是我来教你吧。”小二非常自信，下面是他在 Spring Boot 应用中整合 OSS 做的记录。</p><p>特此声明：阿里云 OSS 的产品负责人看到后请自觉过来结算下推广费用（狗头）。真心讲：Spring Boot+OSS 在实际开发中挺常见的。</p><h3 id="一、开通-oss" tabindex="-1"><a class="header-anchor" href="#一、开通-oss" aria-hidden="true">#</a> 一、开通 OSS</h3><p>OSS 也就是 Object Storage Service，是阿里云提供的一套对象存储服务，国内的竞品还有七牛云的 Kodo和腾讯云的COS。</p><p>第一步，登录阿里云官网，搜索“OSS”关键字，进入 OSS 产品页。</p><p>第二步，如果是 OSS 新用户的话，可以享受 6 个月的新人专享优惠价，不过续费的时候还是会肉疼。</p><p>第三步，进入 OSS 管理控制台，点击「Bucket 列表」，点击「创建 Bucket」。</p><p><img src="https://img-blog.csdnimg.cn/img_convert/90545c542bb7576f37d3e7d214d65ea2.png" alt=""></p><p>Bucket 的词面意思是桶，这里指存储空间，就是用于存储对象的容器。注意读写权限为“公共读”，也就是允许互联网用户访问云空间上的图片。</p><p>第四步，点击「确定」就算是开通成功了。</p><h3 id="二、整合-oss" tabindex="-1"><a class="header-anchor" href="#二、整合-oss" aria-hidden="true">#</a> 二、整合 OSS</h3><p>第一步，在 pom.xml 文件中添加 OSS 的依赖。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;!-- 阿里云 OSS --&gt;
 &lt;dependency&gt;
     &lt;groupId&gt;com.aliyun.oss&lt;/groupId&gt;
     &lt;artifactId&gt;aliyun-sdk-oss&lt;/artifactId&gt;
@@ -190,7 +190,7 @@
     <span class="token punctuation">}</span>
     <span class="token keyword">return</span> <span class="token function">formatOSSPath</span><span class="token punctuation">(</span>objectName<span class="token punctuation">)</span><span class="token punctuation">;</span>
 <span class="token punctuation">}</span>
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>第三步，通过 Web 管理端来测试外链是否转链成功。先找两张外链的图片，可以看到 markdown 在预览的时候就不显示。</p><p><img src="https://img-blog.csdnimg.cn/img_convert/5d7f479d69f7139d1ceb26ac27e2b19f.png" alt=""></p><p>然后我们点击发布，可以看到两张图片都正常显示了，因为转成了 OSS 的图片访问地址。</p><p><img src="https://img-blog.csdnimg.cn/img_convert/5acb7ffa8c9856b6c5471632ae2e9ecf.png" alt=""></p><h3 id="五、小结" tabindex="-1"><a class="header-anchor" href="#五、小结" aria-hidden="true">#</a> 五、小结</h3><p>综上来看，实习生小二在 Spring Boot 中整合 OSS 的代码还是挺靠谱的。也许 OSS+CDN 才是图床的最好解决方案，不过<a href="https://mp.weixin.qq.com/s/VRmXn2_71yy3w-SvKTs1Fg" target="_blank" rel="noopener noreferrer">阿里云的 HTTPS CDN 在 GitHub 上无法回源<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>导致图片不显示的问题仍然没有得到有效的解决。</p><p>需要源码的小伙伴可以直接到编程喵🐱源码路径拉取：</p><blockquote><p><a href="https://github.com/itwanger/coding-more" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/coding-more<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><hr></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/springboot/oss.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/3/22 下午3:30:06</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span><!--]--><!--]--></div></footer><!----><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
-    <script type="module" src="/assets/app.a0271b9c.js" defer></script>
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>第三步，通过 Web 管理端来测试外链是否转链成功。先找两张外链的图片，可以看到 markdown 在预览的时候就不显示。</p><p><img src="https://img-blog.csdnimg.cn/img_convert/5d7f479d69f7139d1ceb26ac27e2b19f.png" alt=""></p><p>然后我们点击发布，可以看到两张图片都正常显示了，因为转成了 OSS 的图片访问地址。</p><p><img src="https://img-blog.csdnimg.cn/img_convert/5acb7ffa8c9856b6c5471632ae2e9ecf.png" alt=""></p><h3 id="五、小结" tabindex="-1"><a class="header-anchor" href="#五、小结" aria-hidden="true">#</a> 五、小结</h3><p>综上来看，实习生小二在 Spring Boot 中整合 OSS 的代码还是挺靠谱的。也许 OSS+CDN 才是图床的最好解决方案，不过<a href="https://mp.weixin.qq.com/s/VRmXn2_71yy3w-SvKTs1Fg" target="_blank" rel="noopener noreferrer">阿里云的 HTTPS CDN 在 GitHub 上无法回源<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>导致图片不显示的问题仍然没有得到有效的解决。</p><p>需要源码的小伙伴可以直接到编程喵🐱源码路径拉取：</p><blockquote><p><a href="https://github.com/itwanger/coding-more" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/coding-more<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><hr><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/springboot/oss.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/6/10 下午7:28:25</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span><!--]--><!--]--></div></footer><!----><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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diff --git a/dist/springboot/springtask.html b/dist/springboot/springtask.html
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+    <meta property="og:url" content="https://tobebetterjavaer.com/springboot/springtask.html"><meta property="og:site_name" content="Java 程序员进阶之路"><meta property="og:title" content="Spring Boot 整合 Spring Task 实现定时任务"><meta property="og:type" content="article"><meta property="og:updated_time" content="2022-06-10T11:28:25.000Z"><meta property="og:locale" content="zh-CN"><meta property="article:tag" content="Spring Boot"><meta property="article:modified_time" content="2022-06-10T11:28:25.000Z"><script>
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right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Spring Boot 整合 Spring Task 实现定时任务</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 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19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 8 分钟</span><meta property="timeRequired" content="PT8M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/springtask.html#timer" class="router-link-active router-link-exact-active toc-link level3">Timer</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/springtask.html#scheduledthreadpoolexecutor" class="router-link-active router-link-exact-active toc-link level3">ScheduledThreadPoolExecutor</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/springtask.html#关于-spring-task" class="router-link-active router-link-exact-active toc-link level3">关于 Spring Task</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/springtask.html#关于-cron-表达式" class="router-link-active router-link-exact-active toc-link level3">关于 Cron 表达式</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/springtask.html#小结" class="router-link-active router-link-exact-active toc-link level3">小结</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/springtask.html#源码路径" class="router-link-active router-link-exact-active toc-link level3">源码路径</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><p>定时任务的应用场景其实蛮常见的：</p><ul><li>数据备份</li><li>订单未支付则自动取消</li><li>定时爬取数据</li><li>定时推送信息</li><li>定时发布文章</li><li>定时生成报表</li><li>等等（想不到其他场景了，就只能等等来凑，等等也算是一种定时的场景吧！）</li></ul><h3 id="timer" tabindex="-1"><a class="header-anchor" href="#timer" aria-hidden="true">#</a> Timer</h3><p>JDK 1.3 就开始支持的一种定时任务的实现方式。内部通过 TaskQueue 的类来存放定时任务，用起来比较简单，但缺陷比较多，比如说一个 Timer 就会起一个线程，任务多了性能就非常差，再比如说如果执行任务期间某个 TimerTask 耗时比较久，就会影响其他任务的调度。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token annotation punctuation">@Slf4j</span>
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class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.7 分布式</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.8 消息队列</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Spring Boot 整合 Spring Task 实现定时任务</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 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aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 8 分钟</span><meta property="timeRequired" content="PT8M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/springtask.html#timer" class="router-link-active router-link-exact-active toc-link level3">Timer</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/springtask.html#scheduledthreadpoolexecutor" class="router-link-active router-link-exact-active toc-link level3">ScheduledThreadPoolExecutor</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/springtask.html#关于-spring-task" class="router-link-active router-link-exact-active toc-link level3">关于 Spring Task</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/springtask.html#关于-cron-表达式" class="router-link-active router-link-exact-active toc-link level3">关于 Cron 表达式</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/springtask.html#小结" class="router-link-active router-link-exact-active toc-link level3">小结</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/springtask.html#源码路径" class="router-link-active router-link-exact-active toc-link level3">源码路径</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><p>定时任务的应用场景其实蛮常见的：</p><ul><li>数据备份</li><li>订单未支付则自动取消</li><li>定时爬取数据</li><li>定时推送信息</li><li>定时发布文章</li><li>定时生成报表</li><li>等等（想不到其他场景了，就只能等等来凑，等等也算是一种定时的场景吧！）</li></ul><h3 id="timer" tabindex="-1"><a class="header-anchor" href="#timer" aria-hidden="true">#</a> Timer</h3><p>JDK 1.3 就开始支持的一种定时任务的实现方式。内部通过 TaskQueue 的类来存放定时任务，用起来比较简单，但缺陷比较多，比如说一个 Timer 就会起一个线程，任务多了性能就非常差，再比如说如果执行任务期间某个 TimerTask 耗时比较久，就会影响其他任务的调度。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token annotation punctuation">@Slf4j</span>
 <span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">TimerDemo</span> <span class="token punctuation">{</span>
     <span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">void</span> <span class="token function">main</span><span class="token punctuation">(</span><span class="token class-name">String</span><span class="token punctuation">[</span><span class="token punctuation">]</span> args<span class="token punctuation">)</span> <span class="token punctuation">{</span>
         <span class="token class-name">TimerTask</span> task <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">TimerTask</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
@@ -157,7 +157,7 @@
 2022-04-27 15:33:07.390  INFO 4421 --- [led-task-pool-1] c.codingmore.component.PublishPostTask   : Fixed Rate Task : The time is now 2022-04-27 15:33:07
 2022-04-27 15:33:09.391  INFO 4421 --- [led-task-pool-1] c.codingmore.component.PublishPostTask   : Fixed Rate Task : The time is now 2022-04-27 15:33:09
 2022-04-27 15:33:13.295  INFO 4421 --- [led-task-pool-1] c.codingmore.component.PublishPostTask   : Fixed Rate Task : The time is now 2022-04-27 15:33:13
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="关于-cron-表达式" tabindex="-1"><a class="header-anchor" href="#关于-cron-表达式" aria-hidden="true">#</a> 关于 Cron 表达式</h3><p>这里顺带普及一下 Cron 表达式，在定时任务中会经常会遇到。Cron 这个词来源于希腊语 chronos，原意也就是时间。</p><p>Cron 表达式是一个含有时间意义的字符串，以 5 个空格隔开，分成 6 个时间元素。举几个例子就一目了然了。</p><table><thead><tr><th>示例</th><th>说明</th></tr></thead><tbody><tr><td><code>0 15 10 ? * *</code></td><td>每天上午10:15执行任务</td></tr><tr><td><code>0 0 10,14,16 * * ?</code></td><td>每天10 点、14 点、16 点执行任务</td></tr><tr><td><code>0 0 12 ? * 3</code></td><td>每个星期三中午 12 点执行任务</td></tr><tr><td><code>0 15 10 15 * ?</code></td><td>每月 15 日上午 10 点 15 执行任务</td></tr></tbody></table><p>Cron 的语法格式可以总结为：</p><blockquote><p>Seconds Minutes Hours DayofMonth Month DayofWeek</p></blockquote><p>每个时间元素的取值范围，以及可出现的特殊字符如下所示。</p><table><thead><tr><th>时间元素</th><th>取值范围</th><th>可出现的特殊字符</th></tr></thead><tbody><tr><td>秒</td><td><code>[0,59]</code></td><td><code>*,-/</code></td></tr><tr><td>分钟</td><td><code>[0,59]</code></td><td><code>*,-/</code></td></tr><tr><td>小时</td><td><code>[0,59]</code></td><td><code>*,-/</code></td></tr><tr><td>日期</td><td><code>[0,31]</code></td><td><code>*,-/?LW</code></td></tr><tr><td>月份</td><td><code>[1,12]</code></td><td><code>*,-/</code></td></tr><tr><td>星期</td><td><code>[1,7]</code></td><td><code>*,-/?L#</code></td></tr></tbody></table><p>特殊字符的含义和示例如下所示。</p><table><thead><tr><th>特殊字符</th><th>含义</th><th>示例</th></tr></thead><tbody><tr><td><code>*</code></td><td>所有可能的值</td><td>很好理解，月域中为每个月，星期域中每个星期几</td></tr><tr><td><code>,</code></td><td>枚举的值</td><td>很好理解，小时域中 <code>10,14,16</code>，就表示这几个小时可选</td></tr><tr><td><code>-</code></td><td>范围</td><td>很好理解，分钟域中 <code>10-19</code>，就表示 10-19 分钟每隔一分钟执行一次</td></tr><tr><td><code>/</code></td><td>指定数值的增量</td><td>很好理解，分钟域中 <code>0/15</code>，就表示每隔 15 分钟执行一次</td></tr><tr><td><code>?</code></td><td>不指定值</td><td>很好理解，日期域指定了星期域就不能指定值，反之亦然，因为日期域和星期域属于冲突关系</td></tr><tr><td><code>L</code></td><td>单词 Last 的首字母</td><td>很好理解，日期域和星期域支持，表示月的最后一天或者星期的最后一天</td></tr><tr><td><code>W</code></td><td>除周末以外的工作日</td><td>很好理解，仅日期域支持</td></tr><tr><td><code>#</code></td><td>每个月的第几个星期几</td><td>很好理解，仅星期域支持，<code>4#2</code>表示某月的第二个星期四</td></tr></tbody></table><h3 id="小结" tabindex="-1"><a class="header-anchor" href="#小结" aria-hidden="true">#</a> 小结</h3><p>Spring Task 虽然用起来很方便，但用法过去简单，很多复杂的业务逻辑是没有办法实现的，比如说编程喵的定时发布文章功能，只用 Spring Task 是没办法的。</p><hr><p>更多内容，只针对《Java 程序员进阶之路》星球用户开放，需要的小伙伴可以<a href="/springboot/docs/zhishixingqiu/" class="">戳链接🔗</a>加入我们的星球，一起学习，一起卷。。<strong>编程喵</strong>🐱是一个 Spring Boot+Vue 的前后端分离项目，融合了市面上绝大多数流行的技术要点。通过学习实战项目，你可以将所学的知识通过实践进行检验、你可以拓宽自己的技术边界，你可以掌握一个真正的实战项目是如何从 0 到 1 的。</p><hr><h3 id="源码路径" tabindex="-1"><a class="header-anchor" href="#源码路径" aria-hidden="true">#</a> 源码路径</h3><blockquote><ul><li>编程喵：<a href="https://github.com/itwanger/coding-more" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/coding-more<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li>codingmore-springtask：<a href="https://github.com/itwanger/codingmore-learning/tree/main/codingmore-springtask" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/codingmore-learning<span><svg class="external-link-icon" 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+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="关于-cron-表达式" tabindex="-1"><a class="header-anchor" href="#关于-cron-表达式" aria-hidden="true">#</a> 关于 Cron 表达式</h3><p>这里顺带普及一下 Cron 表达式，在定时任务中会经常会遇到。Cron 这个词来源于希腊语 chronos，原意也就是时间。</p><p>Cron 表达式是一个含有时间意义的字符串，以 5 个空格隔开，分成 6 个时间元素。举几个例子就一目了然了。</p><table><thead><tr><th>示例</th><th>说明</th></tr></thead><tbody><tr><td><code>0 15 10 ? * *</code></td><td>每天上午10:15执行任务</td></tr><tr><td><code>0 0 10,14,16 * * ?</code></td><td>每天10 点、14 点、16 点执行任务</td></tr><tr><td><code>0 0 12 ? * 3</code></td><td>每个星期三中午 12 点执行任务</td></tr><tr><td><code>0 15 10 15 * ?</code></td><td>每月 15 日上午 10 点 15 执行任务</td></tr></tbody></table><p>Cron 的语法格式可以总结为：</p><blockquote><p>Seconds Minutes Hours DayofMonth Month DayofWeek</p></blockquote><p>每个时间元素的取值范围，以及可出现的特殊字符如下所示。</p><table><thead><tr><th>时间元素</th><th>取值范围</th><th>可出现的特殊字符</th></tr></thead><tbody><tr><td>秒</td><td><code>[0,59]</code></td><td><code>*,-/</code></td></tr><tr><td>分钟</td><td><code>[0,59]</code></td><td><code>*,-/</code></td></tr><tr><td>小时</td><td><code>[0,59]</code></td><td><code>*,-/</code></td></tr><tr><td>日期</td><td><code>[0,31]</code></td><td><code>*,-/?LW</code></td></tr><tr><td>月份</td><td><code>[1,12]</code></td><td><code>*,-/</code></td></tr><tr><td>星期</td><td><code>[1,7]</code></td><td><code>*,-/?L#</code></td></tr></tbody></table><p>特殊字符的含义和示例如下所示。</p><table><thead><tr><th>特殊字符</th><th>含义</th><th>示例</th></tr></thead><tbody><tr><td><code>*</code></td><td>所有可能的值</td><td>很好理解，月域中为每个月，星期域中每个星期几</td></tr><tr><td><code>,</code></td><td>枚举的值</td><td>很好理解，小时域中 <code>10,14,16</code>，就表示这几个小时可选</td></tr><tr><td><code>-</code></td><td>范围</td><td>很好理解，分钟域中 <code>10-19</code>，就表示 10-19 分钟每隔一分钟执行一次</td></tr><tr><td><code>/</code></td><td>指定数值的增量</td><td>很好理解，分钟域中 <code>0/15</code>，就表示每隔 15 分钟执行一次</td></tr><tr><td><code>?</code></td><td>不指定值</td><td>很好理解，日期域指定了星期域就不能指定值，反之亦然，因为日期域和星期域属于冲突关系</td></tr><tr><td><code>L</code></td><td>单词 Last 的首字母</td><td>很好理解，日期域和星期域支持，表示月的最后一天或者星期的最后一天</td></tr><tr><td><code>W</code></td><td>除周末以外的工作日</td><td>很好理解，仅日期域支持</td></tr><tr><td><code>#</code></td><td>每个月的第几个星期几</td><td>很好理解，仅星期域支持，<code>4#2</code>表示某月的第二个星期四</td></tr></tbody></table><h3 id="小结" tabindex="-1"><a class="header-anchor" href="#小结" aria-hidden="true">#</a> 小结</h3><p>Spring Task 虽然用起来很方便，但用法过去简单，很多复杂的业务逻辑是没有办法实现的，比如说编程喵的定时发布文章功能，只用 Spring Task 是没办法的。</p><hr><p>更多内容，只针对《Java 程序员进阶之路》星球用户开放，需要的小伙伴可以<a href="https://tobebetterjavaer.com/zhishixingqiu/" target="_blank" rel="noopener noreferrer">戳链接🔗<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path 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d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li>codingmore-springtask：<a href="https://github.com/itwanger/codingmore-learning/tree/main/codingmore-springtask" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/codingmore-learning<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 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class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 8 分钟</span><meta property="timeRequired" content="PT8M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/swagger.html#关于-swagger" class="router-link-active router-link-exact-active toc-link level3">关于 Swagger</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/swagger.html#整合-swagger-ui" class="router-link-active router-link-exact-active toc-link level3">整合 Swagger-UI</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/swagger.html#版本不兼容" class="router-link-active router-link-exact-active toc-link level3">版本不兼容</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/swagger.html#小结" class="router-link-active router-link-exact-active toc-link level3">小结</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/swagger.html#源码路径" class="router-link-active router-link-exact-active toc-link level3">源码路径</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h3 id="关于-swagger" tabindex="-1"><a class="header-anchor" href="#关于-swagger" aria-hidden="true">#</a> 关于 Swagger</h3><p>Swagger 是一个用于生成、描述和调用 RESTful 接口的 Web 服务。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/swagger-febf2633-5b02-425b-a513-c8583e14d621.png" alt=""></p><blockquote><p>想要理解RESTful架构的话，可以戳链接查看阮一峰老师的博客：<a href="https://www.ruanyifeng.com/blog/2011/09/restful.html" target="_blank" rel="noopener noreferrer">https://www.ruanyifeng.com/blog/2011/09/restful.html<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>换句话说，Swagger 就是将项目中想要暴露的接口展示在页面上，开发者可以直接进行接口调用和测试，能在很大程度上提升开发的效率。</p><p>比如说，一个后端程序员写了一个登录接口，想要测试自己写的接口是否符合预期的话，就得先模拟用户登录的行为，包括正常的行为（输入正确的用户名和密码）和异常的行为（输入错误的用户名和密码），这就要命了。</p><p>但有了 Swagger 后，可以通过简单的配置生成接口的展示页面，把接口的请求参数、返回结果通过可视化的形式展示出来，并且提供了便捷的测试服务。</p><ul><li>前端程序员可以通过接口展示页面查看需要传递的请求参数和返回的数据格式，不需要后端程序员再编写接口文档了；</li><li>后端程序员可以通过接口展示页面测试验证自己的接口是否符合预期，降低了开发阶段的调试成本。</li></ul><p>前后端分离就可以很完美的落地了，有没有？</p><blockquote><p>Swagger 官网地址：<a href="https://swagger.io/" target="_blank" rel="noopener noreferrer">https://swagger.io/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>那在 Swagger 出现之前，局面就比较糟糕。前端经常抱怨后端给的接口文档与实际情况不一致。后端又觉得编写及维护接口文档会耗费不少精力，经常来不及更新。</p><p>大家都被无情地折磨，痛不堪言。。。</p><p>Swagger 定义了一套规范，你只需要按照它的规范去定义接口及接口相关的信息，然后通过 Swagger 衍生出来的一系列工具，就可以生成各种格式的接口文档，甚至还可以生成多种语言的客户端和服务端代码，以及在线接口调试页面等等。</p><p>那只要及时更新 Swagger 的描述文件，就可以自动生成接口文档了，做到调用端代码、服务端代码以及接口文档的一致性。</p><h3 id="整合-swagger-ui" tabindex="-1"><a class="header-anchor" href="#整合-swagger-ui" aria-hidden="true">#</a> 整合 Swagger-UI</h3><p>Swagger-UI 是一套 HTML/CSS/JS 框架，用于渲染 Swagger 文档，以便提供美观的 API 文档界面。</p><p>也就是说，Swagger-UI 是 Swagger 提供的一套可视化渲染组件，支持在线导入描述文件和本地部署UI项目。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/swagger-9cb36679-f1f7-469e-925e-2e54090f700f.png" alt=""></p><p>第一步，在 pom.xml 文件中添加 Swagger 的 starter。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
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clickable active"><!----><span class="title">三、Java企业级开发</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.1 开发工具</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.2 IDE/编辑器</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.3 Spring</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">3.4 SpringBoot</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/springboot/initializr.html" 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class="nav-link sidebar-link sidebar-page" aria-label="过滤器、拦截器、监听器"><!---->过滤器、拦截器、监听器<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/redis/redis-springboot.html" class="nav-link sidebar-link sidebar-page" aria-label="整合Redis实现缓存"><!---->整合Redis实现缓存<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/springboot/logback.html" class="nav-link sidebar-link sidebar-page" aria-label="整合Logback"><!---->整合Logback<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/springboot/swagger.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="整合Swagger-UI"><!---->整合Swagger-UI<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/springboot/swagger.html#关于-swagger" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="关于 Swagger"><!---->关于 Swagger<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/springboot/swagger.html#整合-swagger-ui" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="整合 Swagger-UI"><!---->整合 Swagger-UI<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/springboot/swagger.html#版本不兼容" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="版本不兼容"><!---->版本不兼容<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/springboot/swagger.html#小结" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="小结"><!---->小结<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/springboot/swagger.html#源码路径" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="源码路径"><!---->源码路径<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/gongju/knife4j.html" class="nav-link sidebar-link sidebar-page" aria-label="整合Knife4j"><!---->整合Knife4j<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/springboot/springtask.html" class="nav-link sidebar-link sidebar-page" aria-label="整合SpringTask"><!---->整合SpringTask<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/kaiyuan/auto-generator.html" class="nav-link sidebar-link sidebar-page" aria-label="整合MyBatis-Plus AutoGenerator"><!---->整合MyBatis-Plus AutoGenerator<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/springboot/macos-codingmore-run.html" class="nav-link sidebar-link sidebar-page" aria-label="macOS下如何运行编程喵源码"><!---->macOS下如何运行编程喵源码<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/springboot/windows-codingmore-run.html" class="nav-link sidebar-link sidebar-page" aria-label="Windows下如何运行编程喵源码"><!---->Windows下如何运行编程喵源码<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.5 辅助工具</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.6 开源轮子</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.7 分布式</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.8 消息队列</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Spring Boot整合Swagger-UI实现在线API文档</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年5月18日</span><meta property="datePublished" content="2022-05-18T06:55:27.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category5" role>Java企业级开发</li><meta property="articleSection" content="Java企业级开发"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag1" role>Spring Boot</li></ul><meta property="keywords" content="Spring Boot"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 8 分钟</span><meta property="timeRequired" content="PT8M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/swagger.html#关于-swagger" class="router-link-active router-link-exact-active toc-link level2">关于 Swagger</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/swagger.html#整合-swagger-ui" class="router-link-active router-link-exact-active toc-link level2">整合 Swagger-UI</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/swagger.html#版本不兼容" class="router-link-active router-link-exact-active toc-link level2">版本不兼容</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/swagger.html#小结" class="router-link-active router-link-exact-active toc-link level2">小结</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/swagger.html#源码路径" class="router-link-active router-link-exact-active toc-link level2">源码路径</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h2 id="关于-swagger" tabindex="-1"><a class="header-anchor" href="#关于-swagger" aria-hidden="true">#</a> 关于 Swagger</h2><p>Swagger 是一个用于生成、描述和调用 RESTful 接口的 Web 服务。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/swagger-febf2633-5b02-425b-a513-c8583e14d621.png" alt=""></p><blockquote><p>想要理解RESTful架构的话，可以戳链接查看阮一峰老师的博客：<a href="https://www.ruanyifeng.com/blog/2011/09/restful.html" target="_blank" rel="noopener noreferrer">https://www.ruanyifeng.com/blog/2011/09/restful.html<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>换句话说，Swagger 就是将项目中想要暴露的接口展示在页面上，开发者可以直接进行接口调用和测试，能在很大程度上提升开发的效率。</p><p>比如说，一个后端程序员写了一个登录接口，想要测试自己写的接口是否符合预期的话，就得先模拟用户登录的行为，包括正常的行为（输入正确的用户名和密码）和异常的行为（输入错误的用户名和密码），这就要命了。</p><p>但有了 Swagger 后，可以通过简单的配置生成接口的展示页面，把接口的请求参数、返回结果通过可视化的形式展示出来，并且提供了便捷的测试服务。</p><ul><li>前端程序员可以通过接口展示页面查看需要传递的请求参数和返回的数据格式，不需要后端程序员再编写接口文档了；</li><li>后端程序员可以通过接口展示页面测试验证自己的接口是否符合预期，降低了开发阶段的调试成本。</li></ul><p>前后端分离就可以很完美的落地了，有没有？</p><blockquote><p>Swagger 官网地址：<a href="https://swagger.io/" target="_blank" rel="noopener noreferrer">https://swagger.io/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>那在 Swagger 出现之前，局面就比较糟糕。前端经常抱怨后端给的接口文档与实际情况不一致。后端又觉得编写及维护接口文档会耗费不少精力，经常来不及更新。</p><p>大家都被无情地折磨，痛不堪言。。。</p><p>Swagger 定义了一套规范，你只需要按照它的规范去定义接口及接口相关的信息，然后通过 Swagger 衍生出来的一系列工具，就可以生成各种格式的接口文档，甚至还可以生成多种语言的客户端和服务端代码，以及在线接口调试页面等等。</p><p>那只要及时更新 Swagger 的描述文件，就可以自动生成接口文档了，做到调用端代码、服务端代码以及接口文档的一致性。</p><h2 id="整合-swagger-ui" tabindex="-1"><a class="header-anchor" href="#整合-swagger-ui" aria-hidden="true">#</a> 整合 Swagger-UI</h2><p>Swagger-UI 是一套 HTML/CSS/JS 框架，用于渲染 Swagger 文档，以便提供美观的 API 文档界面。</p><p>也就是说，Swagger-UI 是 Swagger 提供的一套可视化渲染组件，支持在线导入描述文件和本地部署UI项目。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/swagger-9cb36679-f1f7-469e-925e-2e54090f700f.png" alt=""></p><p>第一步，在 pom.xml 文件中添加 Swagger 的 starter。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
     &lt;groupId&gt;io.springfox&lt;/groupId&gt;
     &lt;artifactId&gt;springfox-boot-starter&lt;/artifactId&gt;
     &lt;version&gt;3.0.0&lt;/version&gt;
@@ -87,7 +87,7 @@
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     <span class="token punctuation">}</span>
 <span class="token punctuation">}</span>
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>1）@Api注解，用在类上，该注解将控制器标注为一个 Swagger 资源。该注解有 3 个属性：</p><ul><li>tags，具有相同标签的 API 会被归在一组内展示</li><li>value，如果 tags 没有定义，value 将作为 API 的 tags 使用。</li><li>description，已废弃</li></ul><p>2）@ApiOperation 注解，用在方法上，描述这个方法是做什么用的。该注解有 4 个属性：</p><ul><li>value 操作的简单说明，长度为120个字母，60个汉字。</li><li>notes 对操作的详细说明。</li><li>httpMethod HTTP请求的动作名，可选值有：&quot;GET&quot;, &quot;HEAD&quot;, &quot;POST&quot;, &quot;PUT&quot;, &quot;DELETE&quot;, &quot;OPTIONS&quot; and &quot;PATCH&quot;。</li><li>code 默认为200，有效值必须符合标准的HTTP Status Code Definitions。</li></ul><p>3）@RestController 注解，用在类上，是@ResponseBody和@Controller的组合注解，如果方法要返回 JSON 的话，可省去 @ResponseBody 注解。</p><p>4）@RequestMapping 注解，可用在类（父路径）和方法（子路径）上，主要用来定义 API 的请求路径和请求类型。该注解有 6 个属性：</p><ul><li>value，指定请求的实际地址</li><li>method，指定请求的method类型， GET、POST、PUT、DELETE等</li><li>consumes，指定处理请求的提交内容类型（Content-Type），例如 application/json, text/html</li><li>produces，指定返回的内容类型，仅当request请求头中的(Accept)类型中包含该指定类型才返回</li><li>params，指定request中必须包含某些参数值</li><li>headers，指定request中必须包含某些指定的header值</li></ul><p>第四步，启动服务，在浏览器中输入 <code>http://localhost:8080/swagger-ui/</code> 就可以访问 Swagger 生成的 API 文档了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/swagger-25187213-723a-4120-8485-06759a509659.png" alt=""></p><p>点开 get 请求的面板，点击「try it out」再点击「excute」可以查看接口返回的数据。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/swagger-0f2b9c42-bae4-4712-be29-3771ab3bd3a8.png" alt=""></p><h3 id="版本不兼容" tabindex="-1"><a class="header-anchor" href="#版本不兼容" aria-hidden="true">#</a> 版本不兼容</h3><p>在 Spring Boot 整合 Swagger 的过程中，我发现一个大 bug，Spring Boot 2.6.7 版本和 springfox 3.0.0 版本不兼容，启动的时候直接就报错了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/swagger-529160e4-aa31-410a-aa04-93e9576322b6.png" alt=""></p><blockquote><p>Caused by: java.lang.NullPointerException: Cannot invoke &quot;org.springframework.web.servlet.mvc.condition.PatternsRequestCondition.getPatterns()&quot; because &quot;this.condition&quot; is null</p></blockquote><p>一路跟踪下来，发现 GitHub 上确认有人在 Spring Boot 仓库下提到了这个 bug。</p><blockquote><p><a href="https://github.com/spring-projects/spring-boot/issues/28794" target="_blank" rel="noopener noreferrer">https://github.com/spring-projects/spring-boot/issues/28794<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>Spring Boot 说这是 springfox 的 bug。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/swagger-d0d336e1-2cba-49f4-bd65-6df7f89a6c9f.png" alt=""></p><p>追踪过来一看，确实。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/swagger-cb3c15e7-ecfd-4e5e-92b7-673acb966a54.png" alt=""></p><p>有人提到的解决方案是切换到 SpringDoc。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/swagger-0597f86d-1188-4fe1-8de8-fdb57c5cd524.png" alt=""></p><p>这样就需要切换注解 <code>@Api → @Tag</code>，<code>@ApiOperation(value = &quot;foo&quot;, notes = &quot;bar&quot;) → @Operation(summary = &quot;foo&quot;, description = &quot;bar&quot;)</code>，对旧项目不是很友好，如果是新项目的话，倒是可以直接尝试 SpringDoc。</p><p>还有人提出的解决方案是：</p><ul><li>先将匹配策略调整为 ant-path-matcher（application.yml）。</li></ul><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>spring:
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>1）@Api注解，用在类上，该注解将控制器标注为一个 Swagger 资源。该注解有 3 个属性：</p><ul><li>tags，具有相同标签的 API 会被归在一组内展示</li><li>value，如果 tags 没有定义，value 将作为 API 的 tags 使用。</li><li>description，已废弃</li></ul><p>2）@ApiOperation 注解，用在方法上，描述这个方法是做什么用的。该注解有 4 个属性：</p><ul><li>value 操作的简单说明，长度为120个字母，60个汉字。</li><li>notes 对操作的详细说明。</li><li>httpMethod HTTP请求的动作名，可选值有：&quot;GET&quot;, &quot;HEAD&quot;, &quot;POST&quot;, &quot;PUT&quot;, &quot;DELETE&quot;, &quot;OPTIONS&quot; and &quot;PATCH&quot;。</li><li>code 默认为200，有效值必须符合标准的HTTP Status Code Definitions。</li></ul><p>3）@RestController 注解，用在类上，是@ResponseBody和@Controller的组合注解，如果方法要返回 JSON 的话，可省去 @ResponseBody 注解。</p><p>4）@RequestMapping 注解，可用在类（父路径）和方法（子路径）上，主要用来定义 API 的请求路径和请求类型。该注解有 6 个属性：</p><ul><li>value，指定请求的实际地址</li><li>method，指定请求的method类型， GET、POST、PUT、DELETE等</li><li>consumes，指定处理请求的提交内容类型（Content-Type），例如 application/json, text/html</li><li>produces，指定返回的内容类型，仅当request请求头中的(Accept)类型中包含该指定类型才返回</li><li>params，指定request中必须包含某些参数值</li><li>headers，指定request中必须包含某些指定的header值</li></ul><p>第四步，启动服务，在浏览器中输入 <code>http://localhost:8080/swagger-ui/</code> 就可以访问 Swagger 生成的 API 文档了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/swagger-25187213-723a-4120-8485-06759a509659.png" alt=""></p><p>点开 get 请求的面板，点击「try it out」再点击「excute」可以查看接口返回的数据。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/swagger-0f2b9c42-bae4-4712-be29-3771ab3bd3a8.png" alt=""></p><h2 id="版本不兼容" tabindex="-1"><a class="header-anchor" href="#版本不兼容" aria-hidden="true">#</a> 版本不兼容</h2><p>在 Spring Boot 整合 Swagger 的过程中，我发现一个大 bug，Spring Boot 2.6.7 版本和 springfox 3.0.0 版本不兼容，启动的时候直接就报错了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/swagger-529160e4-aa31-410a-aa04-93e9576322b6.png" alt=""></p><blockquote><p>Caused by: java.lang.NullPointerException: Cannot invoke &quot;org.springframework.web.servlet.mvc.condition.PatternsRequestCondition.getPatterns()&quot; because &quot;this.condition&quot; is null</p></blockquote><p>一路跟踪下来，发现 GitHub 上确认有人在 Spring Boot 仓库下提到了这个 bug。</p><blockquote><p><a href="https://github.com/spring-projects/spring-boot/issues/28794" target="_blank" rel="noopener noreferrer">https://github.com/spring-projects/spring-boot/issues/28794<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>Spring Boot 说这是 springfox 的 bug。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/swagger-d0d336e1-2cba-49f4-bd65-6df7f89a6c9f.png" alt=""></p><p>追踪过来一看，确实。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/swagger-cb3c15e7-ecfd-4e5e-92b7-673acb966a54.png" alt=""></p><p>有人提到的解决方案是切换到 SpringDoc。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/swagger-0597f86d-1188-4fe1-8de8-fdb57c5cd524.png" alt=""></p><p>这样就需要切换注解 <code>@Api → @Tag</code>，<code>@ApiOperation(value = &quot;foo&quot;, notes = &quot;bar&quot;) → @Operation(summary = &quot;foo&quot;, description = &quot;bar&quot;)</code>，对旧项目不是很友好，如果是新项目的话，倒是可以直接尝试 SpringDoc。</p><p>还有人提出的解决方案是：</p><ul><li>先将匹配策略调整为 ant-path-matcher（application.yml）。</li></ul><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>spring:
   mvc:
     path match:
       matching-strategy: ANT_PATH_MATCHER
@@ -123,7 +123,7 @@ public static BeanPostProcessor springfoxHandlerProviderBeanPostProcessor() {
         }
     };
 }
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><blockquote><p>解决方案地址：<a href="https://github.com/springfox/springfox/issues/3462" target="_blank" rel="noopener noreferrer">https://github.com/springfox/springfox/issues/3462<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>重新编译项目，就会发现错误消失了，我只能说GitHub 仓库的 issue 区都是大神！</p><p>查看 Swagger 接口文档，发现一切正常。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/swagger-05265d24-5242-48ac-9776-58e72798a545.png" alt=""></p><p>我只能再强调一次，GitHub 仓库的 issue 区都是大神！大家遇到问题的时候，一定要多到 issue 区看看。</p><p>至于为什么要这样做，问题的解决者给出了自己的答案。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/swagger-8b3d90d6-4eac-4db8-ab52-69c55078df36.png" alt=""></p><p>大致的意思就是 springfox 和 Spring 在 pathPatternsCondition 上产生了分歧，这两个步骤就是用来消除这个分歧的。</p><p>除此之外，还有另外一种保守的做法，直接将 Spring Boot 的版本回退到更低的版本，比如说 2.4.5。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/swagger-41096e72-bd7c-4663-b57e-fbc8506ec1cc.png" alt=""></p><h3 id="小结" tabindex="-1"><a class="header-anchor" href="#小结" aria-hidden="true">#</a> 小结</h3><p>Swagger 虽然解决了调用端代码、服务端代码以及接口文档的不一致的问题，但有一说一，Swagger-UI 实在是太丑了。</p><hr><p>更多内容，只针对《Java 程序员进阶之路》星球用户开放，需要的小伙伴可以<a href="/springboot/docs/zhishixingqiu/" class="">戳链接🔗</a>加入我们的星球，一起学习，一起卷。。<strong>编程喵</strong>🐱是一个 Spring Boot+Vue 的前后端分离项目，融合了市面上绝大多数流行的技术要点。通过学习实战项目，你可以将所学的知识通过实践进行检验、你可以拓宽自己的技术边界，你可以掌握一个真正的实战项目是如何从 0 到 1 的。</p><hr><h3 id="源码路径" tabindex="-1"><a class="header-anchor" href="#源码路径" aria-hidden="true">#</a> 源码路径</h3><blockquote><ul><li>编程喵：<a href="https://github.com/itwanger/coding-more" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/coding-more<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li>codingmore-swagger：<a href="https://github.com/itwanger/codingmore-learning/tree/main/codingmore-swagger" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/codingmore-learning<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul></blockquote></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/springboot/swagger.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link 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+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><blockquote><p>解决方案地址：<a href="https://github.com/springfox/springfox/issues/3462" target="_blank" rel="noopener noreferrer">https://github.com/springfox/springfox/issues/3462<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>重新编译项目，就会发现错误消失了，我只能说GitHub 仓库的 issue 区都是大神！</p><p>查看 Swagger 接口文档，发现一切正常。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/swagger-05265d24-5242-48ac-9776-58e72798a545.png" alt=""></p><p>我只能再强调一次，GitHub 仓库的 issue 区都是大神！大家遇到问题的时候，一定要多到 issue 区看看。</p><p>至于为什么要这样做，问题的解决者给出了自己的答案。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/swagger-8b3d90d6-4eac-4db8-ab52-69c55078df36.png" alt=""></p><p>大致的意思就是 springfox 和 Spring 在 pathPatternsCondition 上产生了分歧，这两个步骤就是用来消除这个分歧的。</p><p>除此之外，还有另外一种保守的做法，直接将 Spring Boot 的版本回退到更低的版本，比如说 2.4.5。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/swagger-41096e72-bd7c-4663-b57e-fbc8506ec1cc.png" alt=""></p><h2 id="小结" tabindex="-1"><a class="header-anchor" href="#小结" aria-hidden="true">#</a> 小结</h2><p>Swagger 虽然解决了调用端代码、服务端代码以及接口文档的不一致的问题，但有一说一，Swagger-UI 实在是太丑了。</p><hr><p>更多内容，只针对《Java 程序员进阶之路》星球用户开放，需要的小伙伴可以<a href="https://tobebetterjavaer.com/zhishixingqiu/" target="_blank" rel="noopener noreferrer">戳链接🔗<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>加入我们的星球，一起学习，一起卷。。<strong>编程喵</strong>🐱是一个 Spring Boot+Vue 的前后端分离项目，融合了市面上绝大多数流行的技术要点。通过学习实战项目，你可以将所学的知识通过实践进行检验、你可以拓宽自己的技术边界，你可以掌握一个真正的实战项目是如何从 0 到 1 的。</p><hr><h2 id="源码路径" tabindex="-1"><a class="header-anchor" href="#源码路径" aria-hidden="true">#</a> 源码路径</h2><blockquote><ul><li>编程喵：<a href="https://github.com/itwanger/coding-more" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/coding-more<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li>codingmore-swagger：<a href="https://github.com/itwanger/codingmore-learning/tree/main/codingmore-swagger" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/codingmore-learning<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" 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class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Spring Boot 整合 Thymeleaf 模板引擎</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 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content="PT3M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/thymeleaf.html#关于-thymeleaf" class="router-link-active router-link-exact-active toc-link level3">关于 Thymeleaf</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/thymeleaf.html#整合-thymeleaf" class="router-link-active router-link-exact-active toc-link level3">整合 Thymeleaf</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/thymeleaf.html#http-client" class="router-link-active router-link-exact-active toc-link level3">HTTP Client</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/thymeleaf.html#源码地址" class="router-link-active router-link-exact-active toc-link level3">源码地址</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h3 id="关于-thymeleaf" tabindex="-1"><a class="header-anchor" href="#关于-thymeleaf" aria-hidden="true">#</a> 关于 Thymeleaf</h3><p>Thymeleaf 是一个优秀的、面向 Java 的 HTML 页面模板，具有丰富的标签语言和函数。在 JSP 被淘汰之后，Thymeleaf 取而代之成为了 Spring Boot 推荐的模板引擎。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/thymeleaf-d373bf02-a577-4382-89b4-0b29a87ab922.png" alt=""></p><p>Thymeleaf 在有网和没网的环境下都可以正常工作，既能让美工在浏览器中查看页面的静态效果，也能让程序员在服务器查看带数据的动态页面效果。</p><p>这是因为 Thymeleaf 支持 HTML 原型，在 HTML 标签里增加额外的属性来达到模板+数据的展示方式。</p><p>浏览器在解释 HTML 的时候会忽略未定义的标签属性，所以 Thymeleaf 可以静态地运行；当有数据返回页面时，Thymeleaf 标签会动态地替换静态内容。</p><p>下面列举一些 Thymeleaf 常用的表达式、标签和函数。</p><p>1）常用表达式</p><ul><li><code>${...}</code>变量表达式</li><li><code>*{...}</code>选择表达式</li><li><code>#{...}</code>文字表达式</li><li><code>@{...}</code>URL 表达式</li><li><code>#maps</code> 对象表达式</li></ul><p>2）常用标签</p><ul><li>th:action 定义服务器端控制器路径。</li><li>th:each 循环语句</li><li>th:field 表单字段</li><li>th:href URL 链接</li><li>th:id div 标签中的 ID</li><li>th:if 条件判断</li><li>th:include 引入文件</li><li>th:fragment 定义代码片段</li><li>th:object 替换对象</li><li>th:src 图片地址</li><li>th:text 文本</li><li>th:value 属性值</li></ul><p>3）常用函数</p><ul><li><code>#dates</code> 日期函数</li><li><code>#lists</code> 列表函数</li><li><code>#arrays</code> 数组函数</li><li><code>#strings</code> 字符串函数</li><li><code>#numbers</code> 数字函数</li><li><code>#calendars</code> 日历函数</li><li><code>#objects</code> 对象函数</li><li><code>#bools</code> 布尔函数</li></ul><p>想要查看更多 Thymeleaf 表达式、标签、函数等内容，可以到 Thymeleaf 官网：</p><blockquote><p><a href="https://www.thymeleaf.org/" target="_blank" rel="noopener noreferrer">https://www.thymeleaf.org/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><h3 id="整合-thymeleaf" tabindex="-1"><a class="header-anchor" href="#整合-thymeleaf" aria-hidden="true">#</a> 整合 Thymeleaf</h3><p>第一步，在 pom.xml 文件中添加 Thymeleaf 的 stater</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
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19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 3 分钟</span><meta property="timeRequired" content="PT3M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/thymeleaf.html#关于-thymeleaf" class="router-link-active router-link-exact-active toc-link level2">关于 Thymeleaf</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/thymeleaf.html#整合-thymeleaf" class="router-link-active router-link-exact-active toc-link level2">整合 Thymeleaf</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/thymeleaf.html#http-client" class="router-link-active router-link-exact-active toc-link level2">HTTP Client</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/thymeleaf.html#源码地址" class="router-link-active router-link-exact-active toc-link level2">源码地址</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h2 id="关于-thymeleaf" tabindex="-1"><a class="header-anchor" href="#关于-thymeleaf" aria-hidden="true">#</a> 关于 Thymeleaf</h2><p>Thymeleaf 是一个优秀的、面向 Java 的 HTML 页面模板，具有丰富的标签语言和函数。在 JSP 被淘汰之后，Thymeleaf 取而代之成为了 Spring Boot 推荐的模板引擎。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/thymeleaf-d373bf02-a577-4382-89b4-0b29a87ab922.png" alt=""></p><p>Thymeleaf 在有网和没网的环境下都可以正常工作，既能让美工在浏览器中查看页面的静态效果，也能让程序员在服务器查看带数据的动态页面效果。</p><p>这是因为 Thymeleaf 支持 HTML 原型，在 HTML 标签里增加额外的属性来达到模板+数据的展示方式。</p><p>浏览器在解释 HTML 的时候会忽略未定义的标签属性，所以 Thymeleaf 可以静态地运行；当有数据返回页面时，Thymeleaf 标签会动态地替换静态内容。</p><p>下面列举一些 Thymeleaf 常用的表达式、标签和函数。</p><p>1）常用表达式</p><ul><li><code>${...}</code>变量表达式</li><li><code>*{...}</code>选择表达式</li><li><code>#{...}</code>文字表达式</li><li><code>@{...}</code>URL 表达式</li><li><code>#maps</code> 对象表达式</li></ul><p>2）常用标签</p><ul><li>th:action 定义服务器端控制器路径。</li><li>th:each 循环语句</li><li>th:field 表单字段</li><li>th:href URL 链接</li><li>th:id div 标签中的 ID</li><li>th:if 条件判断</li><li>th:include 引入文件</li><li>th:fragment 定义代码片段</li><li>th:object 替换对象</li><li>th:src 图片地址</li><li>th:text 文本</li><li>th:value 属性值</li></ul><p>3）常用函数</p><ul><li><code>#dates</code> 日期函数</li><li><code>#lists</code> 列表函数</li><li><code>#arrays</code> 数组函数</li><li><code>#strings</code> 字符串函数</li><li><code>#numbers</code> 数字函数</li><li><code>#calendars</code> 日历函数</li><li><code>#objects</code> 对象函数</li><li><code>#bools</code> 布尔函数</li></ul><p>想要查看更多 Thymeleaf 表达式、标签、函数等内容，可以到 Thymeleaf 官网：</p><blockquote><p><a href="https://www.thymeleaf.org/" target="_blank" rel="noopener noreferrer">https://www.thymeleaf.org/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><h2 id="整合-thymeleaf" tabindex="-1"><a class="header-anchor" href="#整合-thymeleaf" aria-hidden="true">#</a> 整合 Thymeleaf</h2><p>第一步，在 pom.xml 文件中添加 Thymeleaf 的 stater</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
     &lt;groupId&gt;org.springframework.boot&lt;/groupId&gt;
     &lt;artifactId&gt;spring-boot-starter-thymeleaf&lt;/artifactId&gt;
 &lt;/dependency&gt;
@@ -80,7 +80,7 @@
     &lt;/table&gt;
 &lt;/body&gt;
 &lt;/html&gt;
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p><code>&lt;html lang=&quot;zh&quot; xmlns:th=&quot;http://www.thymeleaf.org&quot;&gt;</code> 为 Thymeleaf 的命名空间，通过引入命名空间就可以在 HTML 文件中使用 Thymeleaf 标签语言，用关键字 “th”来标注。</p><p>第五步，启动主类，如果看到以下信息表示启动成功。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/thymeleaf-3e636801-32df-4591-9159-fe83f771f68d.png" alt=""></p><p>第六步，在浏览器地址栏里输入 <code>http://localhost:8080/user/all</code> 访问接口。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/thymeleaf-e4b658fd-e30a-4b00-8818-ab00f8a28620.png" alt=""></p><h3 id="http-client" tabindex="-1"><a class="header-anchor" href="#http-client" aria-hidden="true">#</a> HTTP Client</h3><hr><p>更多内容，只针对《Java 程序员进阶之路》星球用户开放，需要的小伙伴可以<a href="/springboot/docs/zhishixingqiu/" class="">戳链接🔗</a>加入我们的星球，一起学习，一起卷。。<strong>编程喵</strong>🐱是一个 Spring Boot+Vue 的前后端分离项目，融合了市面上绝大多数流行的技术要点。通过学习实战项目，你可以将所学的知识通过实践进行检验、你可以拓宽自己的技术边界，你可以掌握一个真正的实战项目是如何从 0 到 1 的。</p><hr><h3 id="源码地址" tabindex="-1"><a class="header-anchor" href="#源码地址" aria-hidden="true">#</a> 源码地址</h3><blockquote><ul><li>编程喵：<a href="https://github.com/itwanger/coding-more" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/coding-more<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://github.com/itwanger/codingmore-learning/tree/main/codingmore-thymeleaf" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/codingmore-learning<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 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上午12:06:08</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/springboot/jpa.html" class="nav-link prev" aria-label="整合JPA"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->整合JPA</div></a><a href="/springboot/transaction.html" class="nav-link next" aria-label="开启事务支持"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">开启事务支持<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 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-    <script type="module" src="/assets/app.a0271b9c.js" defer></script>
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p><code>&lt;html lang=&quot;zh&quot; xmlns:th=&quot;http://www.thymeleaf.org&quot;&gt;</code> 为 Thymeleaf 的命名空间，通过引入命名空间就可以在 HTML 文件中使用 Thymeleaf 标签语言，用关键字 “th”来标注。</p><p>第五步，启动主类，如果看到以下信息表示启动成功。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/thymeleaf-3e636801-32df-4591-9159-fe83f771f68d.png" alt=""></p><p>第六步，在浏览器地址栏里输入 <code>http://localhost:8080/user/all</code> 访问接口。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/thymeleaf-e4b658fd-e30a-4b00-8818-ab00f8a28620.png" alt=""></p><h2 id="http-client" tabindex="-1"><a class="header-anchor" href="#http-client" aria-hidden="true">#</a> HTTP Client</h2><hr><p>更多内容，只针对《Java 程序员进阶之路》星球用户开放，需要的小伙伴可以<a href="https://tobebetterjavaer.com/zhishixingqiu/" target="_blank" rel="noopener noreferrer">戳链接🔗<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>加入我们的星球，一起学习，一起卷。。<strong>编程喵</strong>🐱是一个 Spring Boot+Vue 的前后端分离项目，融合了市面上绝大多数流行的技术要点。通过学习实战项目，你可以将所学的知识通过实践进行检验、你可以拓宽自己的技术边界，你可以掌握一个真正的实战项目是如何从 0 到 1 的。</p><hr><h2 id="源码地址" tabindex="-1"><a class="header-anchor" href="#源码地址" aria-hidden="true">#</a> 源码地址</h2><blockquote><ul><li>编程喵：<a href="https://github.com/itwanger/coding-more" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/coding-more<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li>codingmore-thymeleaf: <a href="https://github.com/itwanger/codingmore-learning/tree/main/codingmore-thymeleaf" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/codingmore-learning<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div 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0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category5" role>Java企业级开发</li><meta property="articleSection" content="Java企业级开发"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag1" role>Spring Boot</li></ul><meta property="keywords" content="Spring Boot"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 4 分钟</span><meta property="timeRequired" content="PT4M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="spring-boot为什么不需要额外安装tomcat" tabindex="-1"><a class="header-anchor" href="#spring-boot为什么不需要额外安装tomcat" aria-hidden="true">#</a> Spring Boot为什么不需要额外安装Tomcat？</h1><p>首次接触 Spring Boot 的时候，绝大多数小伙伴应该和我一样好奇：</p><blockquote><p>为什么 Spring Boot 不需要额外安装 Tomcat 啊？</p></blockquote><p>到底为什么呢？让我们带着好奇心开始今天的旅程吧。</p><p>打开<a href="https://mp.weixin.qq.com/s/13La2GC5q4ZclEVqf6Mr9w" target="_blank" rel="noopener noreferrer">上一节<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>我们搭建好的 tobebetterjavaer 项目，找到 pom.xml 文件，可以在里面看到一个 parent 属性，代码如下：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;parent&gt;
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19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年1月1日</span><meta property="datePublished" content="2022-01-01T10:27:16.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category5" role>Java企业级开发</li><meta property="articleSection" content="Java企业级开发"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag1" role>Spring Boot</li></ul><meta property="keywords" content="Spring Boot"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 4 分钟</span><meta property="timeRequired" content="PT4M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="spring-boot为什么不需要额外安装tomcat" tabindex="-1"><a class="header-anchor" href="#spring-boot为什么不需要额外安装tomcat" aria-hidden="true">#</a> Spring Boot为什么不需要额外安装Tomcat？</h1><p>首次接触 Spring Boot 的时候，绝大多数小伙伴应该和我一样好奇：</p><blockquote><p>为什么 Spring Boot 不需要额外安装 Tomcat 啊？</p></blockquote><p>到底为什么呢？让我们带着好奇心开始今天的旅程吧。</p><p>打开<a href="https://mp.weixin.qq.com/s/13La2GC5q4ZclEVqf6Mr9w" target="_blank" rel="noopener noreferrer">上一节<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>我们搭建好的 tobebetterjavaer 项目，找到 pom.xml 文件，可以在里面看到一个 parent 属性，代码如下：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;parent&gt;
 	&lt;groupId&gt;org.springframework.boot&lt;/groupId&gt;
 	&lt;artifactId&gt;spring-boot-starter-parent&lt;/artifactId&gt;
 	&lt;version&gt;2.6.1&lt;/version&gt;
@@ -126,6 +126,6 @@
   &lt;/dependencies&gt;
 &lt;/project&gt;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>从这里可以看出来SpringBoot默认的启动容器是Tomcat，Tomcat 的组成核心 jakarta.annotation、tomcat-embed-core、tomcat-annotations-api、org.apache.tomcat.embed 全部都通过 Maven 引入过来了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/tomcat-06.png" alt=""></p><p>core 的版本是 9.0.55，Tomcat 官网上最新的 9.0.x 版本是 9.0.56，高了一个版本。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/tomcat-07.png" alt=""></p><p>不过无所谓，直接下载 9.0.56 的 src，对比看一下，是否大致相同。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/tomcat-08.png" alt=""></p><p>对比之下可以看得出，Spring Boot 引入的 Tomcat 更精简一点，大体上都是相同的，这也就是<strong>为什么Spring Boot 不需要额外安装 Tomcat 的根本原因了</strong>。</p><p>Spring Boot 的 starter 已经帮我们搞定过了。这也是Spring Boot 大行其道的重要原因，省去了开发人员配置的时间，更专注于业务逻辑的实现、性能的优化，至于那些繁杂的配置嘛，交给 Spring Boot 这个大管家就可以了，他约定好的东西，只要没问题，不需要特殊化定制，用就对了。</p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/springboot/tomcat.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/12 下午4:24:21</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><!----><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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diff --git a/dist/springboot/transaction.html b/dist/springboot/transaction.html
index 35eed699..6429e9d6 100644
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+    <meta property="og:url" content="https://tobebetterjavaer.com/springboot/transaction.html"><meta property="og:site_name" content="Java 程序员进阶之路"><meta property="og:title" content="Spring Boot 如何开启事务支持？"><meta property="og:type" content="article"><meta property="og:updated_time" content="2022-06-10T11:28:25.000Z"><meta property="og:locale" content="zh-CN"><meta property="article:tag" content="Spring Boot"><meta property="article:modified_time" content="2022-06-10T11:28:25.000Z"><script>
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class="sidebar-heading clickable"><!----><span class="title">3.6 开源轮子</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.7 分布式</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.8 消息队列</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Spring Boot 如何开启事务支持？</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 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80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 14 分钟</span><meta property="timeRequired" content="PT14M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/transaction.html#关于事务" class="router-link-active router-link-exact-active toc-link level3">关于事务</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/transaction.html#关于-spring-对事务的支持" class="router-link-active router-link-exact-active toc-link level3">关于 Spring 对事务的支持</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/transaction.html#事务管理模型" class="router-link-active router-link-exact-active toc-link level3">事务管理模型</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/transaction.html#关于-spring-boot-对事务的支持" class="router-link-active router-link-exact-active toc-link level3">关于 Spring Boot 对事务的支持</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/transaction.html#测试事务是否起效" class="router-link-active router-link-exact-active toc-link level3">测试事务是否起效</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h3 id="关于事务" tabindex="-1"><a class="header-anchor" href="#关于事务" aria-hidden="true">#</a> 关于事务</h3><p>事务在逻辑上是一组操作，<strong>要么执行，要不都不执行</strong>。主要是针对数据库而言的，比如说 MySQL。</p><p>只要记住这一点，理解事务就很容易了。在 Java 中，我们通常要在业务里面处理多个事件，比如说我们有一个保存文章的方法，它除了要保存文章本身之外，还要保存文章对应的标签，标签和文章不在同一个表里，但会通过在文章表里（posts）保存标签主键（tag_id）来关联标签表（tags）：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">savePosts</span><span class="token punctuation">(</span><span class="token class-name">PostsParam</span> postsParam<span class="token punctuation">)</span> <span class="token punctuation">{</span>
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sidebar-page" aria-label="整合MyBatis-Plus AutoGenerator"><!---->整合MyBatis-Plus AutoGenerator<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/springboot/macos-codingmore-run.html" class="nav-link sidebar-link sidebar-page" aria-label="macOS下如何运行编程喵源码"><!---->macOS下如何运行编程喵源码<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/springboot/windows-codingmore-run.html" class="nav-link sidebar-link sidebar-page" aria-label="Windows下如何运行编程喵源码"><!---->Windows下如何运行编程喵源码<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.5 辅助工具</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.6 开源轮子</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.7 分布式</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.8 消息队列</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Spring Boot 如何开启事务支持？</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 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href="/springboot/transaction.html#事务传播行为" class="router-link-active router-link-exact-active toc-link level3">事务传播行为</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/transaction.html#事务隔离级别" class="router-link-active router-link-exact-active toc-link level3">事务隔离级别</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/transaction.html#事务的超时时间" class="router-link-active router-link-exact-active toc-link level3">事务的超时时间</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/transaction.html#事务的只读属性" class="router-link-active router-link-exact-active toc-link level3">事务的只读属性</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/transaction.html#事务的回滚策略" class="router-link-active router-link-exact-active toc-link level3">事务的回滚策略</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/transaction.html#关于-spring-boot-对事务的支持" class="router-link-active router-link-exact-active toc-link level2">关于 Spring Boot 对事务的支持</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/transaction.html#transactional-的作用范围" class="router-link-active router-link-exact-active toc-link level3">@Transactional 的作用范围</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/transaction.html#transactional-的常用配置参数" class="router-link-active router-link-exact-active toc-link level3">@Transactional 的常用配置参数</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/transaction.html#transactional-的使用注意事项总结" class="router-link-active router-link-exact-active toc-link level3">@Transactional 的使用注意事项总结</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/transaction.html#测试事务是否起效" class="router-link-active router-link-exact-active toc-link level2">测试事务是否起效</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h2 id="关于事务" tabindex="-1"><a class="header-anchor" href="#关于事务" aria-hidden="true">#</a> 关于事务</h2><p>事务在逻辑上是一组操作，<strong>要么执行，要不都不执行</strong>。主要是针对数据库而言的，比如说 MySQL。</p><p>只要记住这一点，理解事务就很容易了。在 Java 中，我们通常要在业务里面处理多个事件，比如说我们有一个保存文章的方法，它除了要保存文章本身之外，还要保存文章对应的标签，标签和文章不在同一个表里，但会通过在文章表里（posts）保存标签主键（tag_id）来关联标签表（tags）：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">savePosts</span><span class="token punctuation">(</span><span class="token class-name">PostsParam</span> postsParam<span class="token punctuation">)</span> <span class="token punctuation">{</span>
   <span class="token comment">// 保存文章</span>
   <span class="token function">save</span><span class="token punctuation">(</span>posts<span class="token punctuation">)</span><span class="token punctuation">;</span>
   <span class="token comment">// 处理标签</span>
   <span class="token function">insertOrUpdateTag</span><span class="token punctuation">(</span>postsParam<span class="token punctuation">,</span> posts<span class="token punctuation">)</span><span class="token punctuation">;</span>
 <span class="token punctuation">}</span>
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>那么此时就需要开启事务，保证文章表和标签表中的数据保持同步，要么都执行，要么都不执行。</p><p>否则就有可能造成，文章保存成功了，但标签保存失败了，或者文章保存失败了，标签保存成功了——这些场景都不符合我们的预期。</p><p>为了保证事务是正确可靠的，在数据库进行写入或者更新操作时，就必须得表现出 ACID 的 4 个重要特性：</p><ul><li>原子性（Atomicity）：一个事务中的所有操作，要么全部完成，要么全部不完成，不会结束在中间某个环节。事务在执行过程中发生错误，会被回滚（Rollback）到事务开始前的状态，就像这个事务从来没有执行过一样。</li><li>一致性（Consistency）：在事务开始之前和事务结束以后，数据库的完整性没有被破坏。</li><li>事务隔离（Isolation）：数据库允许多个并发事务同时对其数据进行读写和修改，隔离性可以防止多个事务并发执行时由于交叉执行而导致数据的不一致。</li><li>持久性（Durability）：事务处理结束后，对数据的修改就是永久的，即便系统故障也不会丢失。</li></ul><p>其中，事务隔离又分为 4 种不同的级别，包括：</p><ul><li>未提交读（Read uncommitted），最低的隔离级别，允许“脏读”（dirty reads），事务可以看到其他事务“尚未提交”的修改。如果另一个事务回滚，那么当前事务读到的数据就是脏数据。</li><li>提交读（read committed），一个事务可能会遇到不可重复读（Non Repeatable Read）的问题。不可重复读是指，在一个事务内，多次读同一数据，在这个事务还没有结束时，如果另一个事务恰好修改了这个数据，那么，在第一个事务中，两次读取的数据就可能不一致。</li><li>可重复读（repeatable read），一个事务可能会遇到幻读（Phantom Read）的问题。幻读是指，在一个事务中，第一次查询某条记录，发现没有，但是，当试图更新这条不存在的记录时，竟然能成功，并且，再次读取同一条记录，它就神奇地出现了。</li><li>串行化（Serializable），最严格的隔离级别，所有事务按照次序依次执行，因此，脏读、不可重复读、幻读都不会出现。虽然 Serializable 隔离级别下的事务具有最高的安全性，但是，由于事务是串行执行，所以效率会大大下降，应用程序的性能会急剧降低。如果没有特别重要的情景，一般都不会使用 Serializable 隔离级别。</li></ul><p>需要格外注意的是：<strong>事务能否生效，取决于数据库引擎是否支持事务，MySQL 的 InnoDB 引擎是支持事务的，但 MyISAM 就不支持</strong>。</p><h3 id="关于-spring-对事务的支持" tabindex="-1"><a class="header-anchor" href="#关于-spring-对事务的支持" aria-hidden="true">#</a> 关于 Spring 对事务的支持</h3><p>Spring 支持两种事务方式，分别是编程式事务和声明式事务，后者最常见，通常情况下只需要一个 <code>@Transactional</code> 就搞定了（代码侵入性降到了最低），就像这样：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token annotation punctuation">@Transactional</span>
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>那么此时就需要开启事务，保证文章表和标签表中的数据保持同步，要么都执行，要么都不执行。</p><p>否则就有可能造成，文章保存成功了，但标签保存失败了，或者文章保存失败了，标签保存成功了——这些场景都不符合我们的预期。</p><p>为了保证事务是正确可靠的，在数据库进行写入或者更新操作时，就必须得表现出 ACID 的 4 个重要特性：</p><ul><li>原子性（Atomicity）：一个事务中的所有操作，要么全部完成，要么全部不完成，不会结束在中间某个环节。事务在执行过程中发生错误，会被回滚（Rollback）到事务开始前的状态，就像这个事务从来没有执行过一样。</li><li>一致性（Consistency）：在事务开始之前和事务结束以后，数据库的完整性没有被破坏。</li><li>事务隔离（Isolation）：数据库允许多个并发事务同时对其数据进行读写和修改，隔离性可以防止多个事务并发执行时由于交叉执行而导致数据的不一致。</li><li>持久性（Durability）：事务处理结束后，对数据的修改就是永久的，即便系统故障也不会丢失。</li></ul><p>其中，事务隔离又分为 4 种不同的级别，包括：</p><ul><li>未提交读（Read uncommitted），最低的隔离级别，允许“脏读”（dirty reads），事务可以看到其他事务“尚未提交”的修改。如果另一个事务回滚，那么当前事务读到的数据就是脏数据。</li><li>提交读（read committed），一个事务可能会遇到不可重复读（Non Repeatable Read）的问题。不可重复读是指，在一个事务内，多次读同一数据，在这个事务还没有结束时，如果另一个事务恰好修改了这个数据，那么，在第一个事务中，两次读取的数据就可能不一致。</li><li>可重复读（repeatable read），一个事务可能会遇到幻读（Phantom Read）的问题。幻读是指，在一个事务中，第一次查询某条记录，发现没有，但是，当试图更新这条不存在的记录时，竟然能成功，并且，再次读取同一条记录，它就神奇地出现了。</li><li>串行化（Serializable），最严格的隔离级别，所有事务按照次序依次执行，因此，脏读、不可重复读、幻读都不会出现。虽然 Serializable 隔离级别下的事务具有最高的安全性，但是，由于事务是串行执行，所以效率会大大下降，应用程序的性能会急剧降低。如果没有特别重要的情景，一般都不会使用 Serializable 隔离级别。</li></ul><p>需要格外注意的是：<strong>事务能否生效，取决于数据库引擎是否支持事务，MySQL 的 InnoDB 引擎是支持事务的，但 MyISAM 就不支持</strong>。</p><h2 id="关于-spring-对事务的支持" tabindex="-1"><a class="header-anchor" href="#关于-spring-对事务的支持" aria-hidden="true">#</a> 关于 Spring 对事务的支持</h2><p>Spring 支持两种事务方式，分别是编程式事务和声明式事务，后者最常见，通常情况下只需要一个 <code>@Transactional</code> 就搞定了（代码侵入性降到了最低），就像这样：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token annotation punctuation">@Transactional</span>
 <span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">savePosts</span><span class="token punctuation">(</span><span class="token class-name">PostsParam</span> postsParam<span class="token punctuation">)</span> <span class="token punctuation">{</span>
   <span class="token comment">// 保存文章</span>
   <span class="token function">save</span><span class="token punctuation">(</span>posts<span class="token punctuation">)</span><span class="token punctuation">;</span>
@@ -87,7 +87,7 @@
               transactionManager<span class="token punctuation">.</span><span class="token function">rollback</span><span class="token punctuation">(</span>status<span class="token punctuation">)</span><span class="token punctuation">;</span>
           <span class="token punctuation">}</span>
 <span class="token punctuation">}</span>
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>就编程式事务管理而言，Spring 更推荐使用 TransactionTemplate。</p><p>在编程式事务中，必须在每个业务操作中包含额外的事务管理代码，就导致代码看起来非常的臃肿，但对理解 Spring 的事务管理模型非常有帮助。</p><p><strong>2）声明式事务</strong></p><p>声明式事务将事务管理代码从业务方法中抽离了出来，以声明式的方式来实现事务管理，对于开发者来说，声明式事务显然比编程式事务更易用、更好用。</p><p>当然了，要想实现事务管理和业务代码的抽离，就必须得用到 Spring 当中最关键最核心的技术之一，<a href="https://tobebetterjavaer.com/springboot/aop-log.html" target="_blank" rel="noopener noreferrer">AOP<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，其本质是对方法前后进行拦截，然后在目标方法开始之前创建或者加入一个事务，执行完目标方法之后根据执行的情况提交或者回滚。</p><p><strong>声明式事务虽然优于编程式事务，但也有不足，声明式事务管理的粒度是方法级别，而编程式事务是可以精确到代码块级别的</strong>。</p><h3 id="事务管理模型" tabindex="-1"><a class="header-anchor" href="#事务管理模型" aria-hidden="true">#</a> 事务管理模型</h3><p>Spring 将事务管理的核心抽象为一个事务管理器（TransactionManager），它的源码只有一个简单的接口定义，属于一个标记接口：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">interface</span> <span class="token class-name">TransactionManager</span> <span class="token punctuation">{</span>
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>就编程式事务管理而言，Spring 更推荐使用 TransactionTemplate。</p><p>在编程式事务中，必须在每个业务操作中包含额外的事务管理代码，就导致代码看起来非常的臃肿，但对理解 Spring 的事务管理模型非常有帮助。</p><p><strong>2）声明式事务</strong></p><p>声明式事务将事务管理代码从业务方法中抽离了出来，以声明式的方式来实现事务管理，对于开发者来说，声明式事务显然比编程式事务更易用、更好用。</p><p>当然了，要想实现事务管理和业务代码的抽离，就必须得用到 Spring 当中最关键最核心的技术之一，<a href="https://tobebetterjavaer.com/springboot/aop-log.html" target="_blank" rel="noopener noreferrer">AOP<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，其本质是对方法前后进行拦截，然后在目标方法开始之前创建或者加入一个事务，执行完目标方法之后根据执行的情况提交或者回滚。</p><p><strong>声明式事务虽然优于编程式事务，但也有不足，声明式事务管理的粒度是方法级别，而编程式事务是可以精确到代码块级别的</strong>。</p><h2 id="事务管理模型" tabindex="-1"><a class="header-anchor" href="#事务管理模型" aria-hidden="true">#</a> 事务管理模型</h2><p>Spring 将事务管理的核心抽象为一个事务管理器（TransactionManager），它的源码只有一个简单的接口定义，属于一个标记接口：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">interface</span> <span class="token class-name">TransactionManager</span> <span class="token punctuation">{</span>
 
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>该接口有两个子接口，分别是编程式事务接口 ReactiveTransactionManager 和声明式事务接口 PlatformTransactionManager。我们来重点说说 PlatformTransactionManager，该接口定义了 3 个接口方法：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">interface</span> <span class="token class-name">PlatformTransactionManager</span> <span class="token keyword">extends</span> <span class="token class-name">TransactionManager</span><span class="token punctuation">{</span>
@@ -135,7 +135,7 @@
   <span class="token keyword">boolean</span> <span class="token function">readOnly</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token keyword">default</span> <span class="token boolean">false</span><span class="token punctuation">;</span>
 
 <span class="token punctuation">}</span>
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><ul><li>@Transactional 注解中的 propagation 对应 TransactionDefinition 中的 getPropagationBehavior，默认值为 <code>Propagation.REQUIRED(TransactionDefinition.PROPAGATION_REQUIRED)</code>。</li><li>@Transactional 注解中的 isolation 对应 TransactionDefinition 中的 getIsolationLevel，默认值为 <code>DEFAULT(TransactionDefinition.ISOLATION_DEFAULT)</code>。</li><li>@Transactional 注解中的 timeout 对应 TransactionDefinition 中的 getTimeout，默认值为TransactionDefinition.TIMEOUT_DEFAULT。</li><li>@Transactional 注解中的 readOnly 对应 TransactionDefinition 中的 isReadOnly，默认值为 false。</li></ul><p>说到这，我们来详细地说明一下 Spring 事务的传播行为、事务的隔离级别、事务的超时时间、事务的只读属性，以及事务的回滚规则。</p><h4 id="事务传播行为" tabindex="-1"><a class="header-anchor" href="#事务传播行为" aria-hidden="true">#</a> 事务传播行为</h4><p><strong>当事务方法被另外一个事务方法调用时，必须指定事务应该如何传播</strong>，例如，方法可能继续在当前事务中执行，也可以开启一个新的事务，在自己的事务中执行。</p><p>声明式事务的传播行为可以通过 @Transactional 注解中的 propagation 属性来定义，比如说：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token annotation punctuation">@Transactional</span><span class="token punctuation">(</span>propagation <span class="token operator">=</span> <span class="token class-name">Propagation</span><span class="token punctuation">.</span>REQUIRED<span class="token punctuation">)</span>
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><ul><li>@Transactional 注解中的 propagation 对应 TransactionDefinition 中的 getPropagationBehavior，默认值为 <code>Propagation.REQUIRED(TransactionDefinition.PROPAGATION_REQUIRED)</code>。</li><li>@Transactional 注解中的 isolation 对应 TransactionDefinition 中的 getIsolationLevel，默认值为 <code>DEFAULT(TransactionDefinition.ISOLATION_DEFAULT)</code>。</li><li>@Transactional 注解中的 timeout 对应 TransactionDefinition 中的 getTimeout，默认值为TransactionDefinition.TIMEOUT_DEFAULT。</li><li>@Transactional 注解中的 readOnly 对应 TransactionDefinition 中的 isReadOnly，默认值为 false。</li></ul><p>说到这，我们来详细地说明一下 Spring 事务的传播行为、事务的隔离级别、事务的超时时间、事务的只读属性，以及事务的回滚规则。</p><h3 id="事务传播行为" tabindex="-1"><a class="header-anchor" href="#事务传播行为" aria-hidden="true">#</a> 事务传播行为</h3><p><strong>当事务方法被另外一个事务方法调用时，必须指定事务应该如何传播</strong>，例如，方法可能继续在当前事务中执行，也可以开启一个新的事务，在自己的事务中执行。</p><p>声明式事务的传播行为可以通过 @Transactional 注解中的 propagation 属性来定义，比如说：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token annotation punctuation">@Transactional</span><span class="token punctuation">(</span>propagation <span class="token operator">=</span> <span class="token class-name">Propagation</span><span class="token punctuation">.</span>REQUIRED<span class="token punctuation">)</span>
 <span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">savePosts</span><span class="token punctuation">(</span><span class="token class-name">PostsParam</span> postsParam<span class="token punctuation">)</span> <span class="token punctuation">{</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>TransactionDefinition 一共定义了 7 种事务传播行为：</p><p>01、<code>PROPAGATION_REQUIRED</code></p><p>这也是 @Transactional 默认的事务传播行为，指的是如果当前存在事务，则加入该事务；如果当前没有事务，则创建一个新的事务。更确切地意思是：</p><ul><li>如果外部方法没有开启事务的话，Propagation.REQUIRED 修饰的内部方法会开启自己的事务，且开启的事务相互独立，互不干扰。</li><li>如果外部方法开启事务并且是 Propagation.REQUIRED 的话，所有 Propagation.REQUIRED 修饰的内部方法和外部方法均属于同一事务 ，只要一个方法回滚，整个事务都需要回滚。</li></ul><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">Class</span> <span class="token class-name">A</span> <span class="token punctuation">{</span>
@@ -168,8 +168,8 @@
        <span class="token comment">//do something</span>
     <span class="token punctuation">}</span>
 <span class="token punctuation">}</span>
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>如果 aMethod()发生异常回滚，bMethod()不会跟着回滚，因为 bMethod()开启了独立的事务。但是，如果 bMethod()抛出了未被捕获的异常并且这个异常满足事务回滚规则的话,aMethod()同样也会回滚。</p><p>03、<code>PROPAGATION_NESTED</code></p><p>如果当前存在事务，就在当前事务内执行；否则，就执行与 PROPAGATION_REQUIRED 类似的操作。</p><p>04、<code>PROPAGATION_MANDATORY</code></p><p>如果当前存在事务，则加入该事务；如果当前没有事务，则抛出异常。</p><p>05、<code>PROPAGATION_SUPPORTS</code></p><p>如果当前存在事务，则加入该事务；如果当前没有事务，则以非事务的方式继续运行。</p><p>06、<code>PROPAGATION_NOT_SUPPORTED</code></p><p>以非事务方式运行，如果当前存在事务，则把当前事务挂起。</p><p>07、<code>PROPAGATION_NEVER</code></p><p>以非事务方式运行，如果当前存在事务，则抛出异常。</p><p>3、4、5、6、7 这 5 种事务传播方式不常用，了解即可。</p><h4 id="事务隔离级别" tabindex="-1"><a class="header-anchor" href="#事务隔离级别" aria-hidden="true">#</a> 事务隔离级别</h4><p>前面我们已经了解了数据库的事务隔离级别，再来理解 Spring 的事务隔离级别就容易多了。</p><p>TransactionDefinition 中一共定义了 5 种事务隔离级别：</p><ul><li>ISOLATION_DEFAULT，使用数据库默认的隔离级别，MySql 默认采用的是 REPEATABLE_READ，也就是可重复读。</li><li>ISOLATION_READ_UNCOMMITTED，最低的隔离级别，可能会出现脏读、幻读或者不可重复读。</li><li>ISOLATION_READ_COMMITTED，允许读取并发事务提交的数据，可以防止脏读，但幻读和不可重复读仍然有可能发生。</li><li>ISOLATION_REPEATABLE_READ，对同一字段的多次读取结果都是一致的，除非数据是被自身事务所修改的，可以阻止脏读和不可重复读，但幻读仍有可能发生。</li><li>ISOLATION_SERIALIZABLE，最高的隔离级别，虽然可以阻止脏读、幻读和不可重复读，但会严重影响程序性能。</li></ul><p>通常情况下，我们采用默认的隔离级别 ISOLATION_DEFAULT 就可以了，也就是交给数据库来决定，可以通过 <code>SELECT @@transaction_isolation;</code> 命令来查看 MySql 的默认隔离级别，结果为 REPEATABLE-READ，也就是可重复读。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/transaction-06cb7de0-6316-4ba6-b642-9584bc998468.png" alt=""></p><h4 id="事务的超时时间" tabindex="-1"><a class="header-anchor" href="#事务的超时时间" aria-hidden="true">#</a> 事务的超时时间</h4><p>事务超时，也就是指一个事务所允许执行的最长时间，如果在超时时间内还没有完成的话，就自动回滚。</p><p>假如事务的执行时间格外的长，由于事务涉及到对数据库的锁定，就会导致长时间运行的事务占用数据库资源。</p><h4 id="事务的只读属性" tabindex="-1"><a class="header-anchor" href="#事务的只读属性" aria-hidden="true">#</a> 事务的只读属性</h4><p>如果一个事务只是对数据库执行读操作，那么该数据库就可以利用事务的只读属性，采取优化措施，适用于多条数据库查询操作中。</p><blockquote><p>为什么一个查询操作还要启用事务支持呢？</p></blockquote><p>这是因为 MySql（innodb）默认对每一个连接都启用了 autocommit 模式，在该模式下，每一个发送到 MySql 服务器的 SQL 语句都会在一个单独的事务中进行处理，执行结束后会自动提交事务。</p><p>那如果我们给方法加上了 @Transactional 注解，那这个方法中所有的 SQL 都会放在一个事务里。否则，每条 SQL 都会单独开启一个事务，中间被其他事务修改了数据，都会实时读取到。</p><p>有些情况下，当一次执行多条查询语句时，需要保证数据一致性时，就需要启用事务支持。否则上一条 SQL 查询后，被其他用户改变了数据，那么下一个 SQL 查询可能就会出现不一致的状态。</p><h4 id="事务的回滚策略" tabindex="-1"><a class="header-anchor" href="#事务的回滚策略" aria-hidden="true">#</a> 事务的回滚策略</h4><p>默认情况下，事务只在出现运行时异常（Runtime Exception）时回滚，以及 Error，出现检查异常（checked exception，需要主动捕获处理或者向上抛出）时不回滚。</p><p><a href="https://tobebetterjavaer.com/exception/gailan.html#%E4%B8%89%E3%80%81checked%E5%92%8Cunchecked%E5%BC%82%E5%B8%B8" target="_blank" rel="noopener noreferrer">checked和unchecked异常<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><p>如果你想要回滚特定的异常类型的话，可以这样设置：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token annotation punctuation">@Transactional</span><span class="token punctuation">(</span>rollbackFor<span class="token operator">=</span> <span class="token class-name">MyException</span><span class="token punctuation">.</span><span class="token keyword">class</span><span class="token punctuation">)</span>
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h3 id="关于-spring-boot-对事务的支持" tabindex="-1"><a class="header-anchor" href="#关于-spring-boot-对事务的支持" aria-hidden="true">#</a> 关于 Spring Boot 对事务的支持</h3><p>以前，我们需要通过 XML 配置 Spring 来托管事务，有了 Spring Boot 之后，一切就变得更加简单了，只需要在业务层添加事务注解（<code>@Transactional</code>）就可以快速开启事务。</p><p>也就是说，我们只需要把焦点放在 <code>@Transactional</code> 注解上就可以了。</p><h4 id="transactional-的作用范围" tabindex="-1"><a class="header-anchor" href="#transactional-的作用范围" aria-hidden="true">#</a> @Transactional 的作用范围</h4><ul><li>类上，表明类中所有 public 方法都启用事务</li><li>方法上，最常用的一种</li><li>接口上，不推荐使用</li></ul><h4 id="transactional-的常用配置参数" tabindex="-1"><a class="header-anchor" href="#transactional-的常用配置参数" aria-hidden="true">#</a> @Transactional 的常用配置参数</h4><p>虽然 @Transactional 注解源码中定义了很多属性，但大多数时候，我都是采用默认配置，当然了，如果需要自定义的话，前面也都说明过了。</p><h4 id="transactional-的使用注意事项总结" tabindex="-1"><a class="header-anchor" href="#transactional-的使用注意事项总结" aria-hidden="true">#</a> @Transactional 的使用注意事项总结</h4><p>1）要在 public 方法上使用，在AbstractFallbackTransactionAttributeSource类的computeTransactionAttribute方法中有个判断，如果目标方法不是public，则TransactionAttribute返回null，即不支持事务。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">protected</span> <span class="token class-name">TransactionAttribute</span> <span class="token function">computeTransactionAttribute</span><span class="token punctuation">(</span><span class="token class-name">Method</span> method<span class="token punctuation">,</span> <span class="token annotation punctuation">@Nullable</span> <span class="token class-name">Class</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token operator">?</span><span class="token punctuation">&gt;</span></span> targetClass<span class="token punctuation">)</span> <span class="token punctuation">{</span>
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>如果 aMethod()发生异常回滚，bMethod()不会跟着回滚，因为 bMethod()开启了独立的事务。但是，如果 bMethod()抛出了未被捕获的异常并且这个异常满足事务回滚规则的话,aMethod()同样也会回滚。</p><p>03、<code>PROPAGATION_NESTED</code></p><p>如果当前存在事务，就在当前事务内执行；否则，就执行与 PROPAGATION_REQUIRED 类似的操作。</p><p>04、<code>PROPAGATION_MANDATORY</code></p><p>如果当前存在事务，则加入该事务；如果当前没有事务，则抛出异常。</p><p>05、<code>PROPAGATION_SUPPORTS</code></p><p>如果当前存在事务，则加入该事务；如果当前没有事务，则以非事务的方式继续运行。</p><p>06、<code>PROPAGATION_NOT_SUPPORTED</code></p><p>以非事务方式运行，如果当前存在事务，则把当前事务挂起。</p><p>07、<code>PROPAGATION_NEVER</code></p><p>以非事务方式运行，如果当前存在事务，则抛出异常。</p><p>3、4、5、6、7 这 5 种事务传播方式不常用，了解即可。</p><h3 id="事务隔离级别" tabindex="-1"><a class="header-anchor" href="#事务隔离级别" aria-hidden="true">#</a> 事务隔离级别</h3><p>前面我们已经了解了数据库的事务隔离级别，再来理解 Spring 的事务隔离级别就容易多了。</p><p>TransactionDefinition 中一共定义了 5 种事务隔离级别：</p><ul><li>ISOLATION_DEFAULT，使用数据库默认的隔离级别，MySql 默认采用的是 REPEATABLE_READ，也就是可重复读。</li><li>ISOLATION_READ_UNCOMMITTED，最低的隔离级别，可能会出现脏读、幻读或者不可重复读。</li><li>ISOLATION_READ_COMMITTED，允许读取并发事务提交的数据，可以防止脏读，但幻读和不可重复读仍然有可能发生。</li><li>ISOLATION_REPEATABLE_READ，对同一字段的多次读取结果都是一致的，除非数据是被自身事务所修改的，可以阻止脏读和不可重复读，但幻读仍有可能发生。</li><li>ISOLATION_SERIALIZABLE，最高的隔离级别，虽然可以阻止脏读、幻读和不可重复读，但会严重影响程序性能。</li></ul><p>通常情况下，我们采用默认的隔离级别 ISOLATION_DEFAULT 就可以了，也就是交给数据库来决定，可以通过 <code>SELECT @@transaction_isolation;</code> 命令来查看 MySql 的默认隔离级别，结果为 REPEATABLE-READ，也就是可重复读。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/transaction-06cb7de0-6316-4ba6-b642-9584bc998468.png" alt=""></p><h3 id="事务的超时时间" tabindex="-1"><a class="header-anchor" href="#事务的超时时间" aria-hidden="true">#</a> 事务的超时时间</h3><p>事务超时，也就是指一个事务所允许执行的最长时间，如果在超时时间内还没有完成的话，就自动回滚。</p><p>假如事务的执行时间格外的长，由于事务涉及到对数据库的锁定，就会导致长时间运行的事务占用数据库资源。</p><h3 id="事务的只读属性" tabindex="-1"><a class="header-anchor" href="#事务的只读属性" aria-hidden="true">#</a> 事务的只读属性</h3><p>如果一个事务只是对数据库执行读操作，那么该数据库就可以利用事务的只读属性，采取优化措施，适用于多条数据库查询操作中。</p><blockquote><p>为什么一个查询操作还要启用事务支持呢？</p></blockquote><p>这是因为 MySql（innodb）默认对每一个连接都启用了 autocommit 模式，在该模式下，每一个发送到 MySql 服务器的 SQL 语句都会在一个单独的事务中进行处理，执行结束后会自动提交事务。</p><p>那如果我们给方法加上了 @Transactional 注解，那这个方法中所有的 SQL 都会放在一个事务里。否则，每条 SQL 都会单独开启一个事务，中间被其他事务修改了数据，都会实时读取到。</p><p>有些情况下，当一次执行多条查询语句时，需要保证数据一致性时，就需要启用事务支持。否则上一条 SQL 查询后，被其他用户改变了数据，那么下一个 SQL 查询可能就会出现不一致的状态。</p><h3 id="事务的回滚策略" tabindex="-1"><a class="header-anchor" href="#事务的回滚策略" aria-hidden="true">#</a> 事务的回滚策略</h3><p>默认情况下，事务只在出现运行时异常（Runtime Exception）时回滚，以及 Error，出现检查异常（checked exception，需要主动捕获处理或者向上抛出）时不回滚。</p><p><a href="https://tobebetterjavaer.com/exception/gailan.html#%E4%B8%89%E3%80%81checked%E5%92%8Cunchecked%E5%BC%82%E5%B8%B8" target="_blank" rel="noopener noreferrer">checked和unchecked异常<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><p>如果你想要回滚特定的异常类型的话，可以这样设置：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token annotation punctuation">@Transactional</span><span class="token punctuation">(</span>rollbackFor<span class="token operator">=</span> <span class="token class-name">MyException</span><span class="token punctuation">.</span><span class="token keyword">class</span><span class="token punctuation">)</span>
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h2 id="关于-spring-boot-对事务的支持" tabindex="-1"><a class="header-anchor" href="#关于-spring-boot-对事务的支持" aria-hidden="true">#</a> 关于 Spring Boot 对事务的支持</h2><p>以前，我们需要通过 XML 配置 Spring 来托管事务，有了 Spring Boot 之后，一切就变得更加简单了，只需要在业务层添加事务注解（<code>@Transactional</code>）就可以快速开启事务。</p><p>也就是说，我们只需要把焦点放在 <code>@Transactional</code> 注解上就可以了。</p><h3 id="transactional-的作用范围" tabindex="-1"><a class="header-anchor" href="#transactional-的作用范围" aria-hidden="true">#</a> @Transactional 的作用范围</h3><ul><li>类上，表明类中所有 public 方法都启用事务</li><li>方法上，最常用的一种</li><li>接口上，不推荐使用</li></ul><h3 id="transactional-的常用配置参数" tabindex="-1"><a class="header-anchor" href="#transactional-的常用配置参数" aria-hidden="true">#</a> @Transactional 的常用配置参数</h3><p>虽然 @Transactional 注解源码中定义了很多属性，但大多数时候，我都是采用默认配置，当然了，如果需要自定义的话，前面也都说明过了。</p><h3 id="transactional-的使用注意事项总结" tabindex="-1"><a class="header-anchor" href="#transactional-的使用注意事项总结" aria-hidden="true">#</a> @Transactional 的使用注意事项总结</h3><p>1）要在 public 方法上使用，在AbstractFallbackTransactionAttributeSource类的computeTransactionAttribute方法中有个判断，如果目标方法不是public，则TransactionAttribute返回null，即不支持事务。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">protected</span> <span class="token class-name">TransactionAttribute</span> <span class="token function">computeTransactionAttribute</span><span class="token punctuation">(</span><span class="token class-name">Method</span> method<span class="token punctuation">,</span> <span class="token annotation punctuation">@Nullable</span> <span class="token class-name">Class</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token operator">?</span><span class="token punctuation">&gt;</span></span> targetClass<span class="token punctuation">)</span> <span class="token punctuation">{</span>
     <span class="token comment">// Don&#39;t allow no-public methods as required.</span>
     <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token function">allowPublicMethodsOnly</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">&amp;&amp;</span> <span class="token operator">!</span><span class="token class-name">Modifier</span><span class="token punctuation">.</span><span class="token function">isPublic</span><span class="token punctuation">(</span>method<span class="token punctuation">.</span><span class="token function">getModifiers</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
       <span class="token keyword">return</span> <span class="token keyword">null</span><span class="token punctuation">;</span>
@@ -205,13 +205,13 @@
     <span class="token punctuation">}</span>
     <span class="token keyword">return</span> <span class="token keyword">null</span><span class="token punctuation">;</span>
   <span class="token punctuation">}</span>
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>2）避免同一个类中调用 @Transactional 注解的方法，这样会导致事务失效。</p><p>更多事务失效的场景可以参考：</p><blockquote><p><a href="https://mp.weixin.qq.com/s/qoWlR4ohVMfZf8IlhdSQDQ" target="_blank" rel="noopener noreferrer">https://mp.weixin.qq.com/s/qoWlR4ohVMfZf8IlhdSQDQ<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><h3 id="测试事务是否起效" tabindex="-1"><a class="header-anchor" href="#测试事务是否起效" aria-hidden="true">#</a> 测试事务是否起效</h3><p>在测试之前，我们先把 Spring Boot 默认的日志级别 info 调整为 debug，在 application.yml 文件中 修改：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>logging:
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>2）避免同一个类中调用 @Transactional 注解的方法，这样会导致事务失效。</p><p>更多事务失效的场景可以参考：</p><blockquote><p><a href="https://mp.weixin.qq.com/s/qoWlR4ohVMfZf8IlhdSQDQ" target="_blank" rel="noopener noreferrer">https://mp.weixin.qq.com/s/qoWlR4ohVMfZf8IlhdSQDQ<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><h2 id="测试事务是否起效" tabindex="-1"><a class="header-anchor" href="#测试事务是否起效" aria-hidden="true">#</a> 测试事务是否起效</h2><p>在测试之前，我们先把 Spring Boot 默认的日志级别 info 调整为 debug，在 application.yml 文件中 修改：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>logging:
   level:
     org:
       hibernate: debug
       springframework:
         web: debug
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>然后，来看修改之前查到的数据：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/transaction-f81603c2-a36a-4336-ae56-58f4d381e101.png" alt=""></p><p>开搞。在控制器中添加一个 update 接口，准备修改数据，打算把沉默王二的狗腿子修改为沉默王二的狗腿：</p><hr><p>更多内容，只针对《Java 程序员进阶之路》星球用户开放，需要的小伙伴可以<a href="/springboot/docs/zhishixingqiu/" class="">戳链接🔗</a>加入我们的星球，一起学习，一起卷。。<strong>编程喵</strong>🐱是一个 Spring Boot+Vue 的前后端分离项目，融合了市面上绝大多数流行的技术要点。通过学习实战项目，你可以将所学的知识通过实践进行检验、你可以拓宽自己的技术边界，你可以掌握一个真正的实战项目是如何从 0 到 1 的。</p><hr><blockquote><ul><li>编程喵：<a href="https://github.com/itwanger/coding-more" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/coding-more<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li>本项目源码：<a href="https://github.com/itwanger/codingmore-learning/tree/main/codingmore-transactional" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/codingmore-learning<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/springboot/transaction.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/22 上午12:06:08</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/springboot/thymeleaf.html" class="nav-link prev" aria-label="整合Thymeleaf"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->整合Thymeleaf</div></a><a href="/springboot/Filter-Interceptor-Listener.html" class="nav-link next" aria-label="过滤器、拦截器、监听器"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">过滤器、拦截器、监听器<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
-    <script type="module" src="/assets/app.a0271b9c.js" defer></script>
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>然后，来看修改之前查到的数据：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/transaction-f81603c2-a36a-4336-ae56-58f4d381e101.png" alt=""></p><p>开搞。在控制器中添加一个 update 接口，准备修改数据，打算把沉默王二的狗腿子修改为沉默王二的狗腿：</p><hr><p>更多内容，只针对《Java 程序员进阶之路》星球用户开放，需要的小伙伴可以<a href="https://tobebetterjavaer.com/zhishixingqiu/" target="_blank" rel="noopener noreferrer">戳链接🔗<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>加入我们的星球，一起学习，一起卷。。<strong>编程喵</strong>🐱是一个 Spring Boot+Vue 的前后端分离项目，融合了市面上绝大多数流行的技术要点。通过学习实战项目，你可以将所学的知识通过实践进行检验、你可以拓宽自己的技术边界，你可以掌握一个真正的实战项目是如何从 0 到 1 的。</p><hr><blockquote><ul><li>编程喵：<a href="https://github.com/itwanger/coding-more" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/coding-more<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li>本项目源码：<a href="https://github.com/itwanger/codingmore-learning/tree/main/codingmore-transactional" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/codingmore-learning<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/springboot/transaction.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/6/10 下午7:28:25</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/springboot/thymeleaf.html" class="nav-link prev" 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diff --git a/dist/springboot/windows-codingmore-run.html b/dist/springboot/windows-codingmore-run.html
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clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->如何在本地（Windows环境）跑起来编程喵（Spring Boot+Vue）项目源码？</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 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18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category5" role>Java企业级开发</li><meta property="articleSection" content="Java企业级开发"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag1" role>Spring Boot</li><li class="tag tag2" role>Vue</li></ul><meta property="keywords" content="Spring Boot,Vue"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 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class="toc-item"><a aria-current="page" href="/springboot/windows-codingmore-run.html#下载编程喵-codingmore-源码" class="router-link-active router-link-exact-active toc-link level2">下载编程喵（codingmore）源码</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/windows-codingmore-run.html#部署编程喵-codingmore-源码" class="router-link-active router-link-exact-active toc-link level2">部署编程喵（codingmore）源码</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/windows-codingmore-run.html#_01、mysql" class="router-link-active router-link-exact-active toc-link level3">01、MySQL</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/windows-codingmore-run.html#_02、redis" class="router-link-active router-link-exact-active toc-link level3">02、Redis</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/windows-codingmore-run.html#_04、oss" class="router-link-active router-link-exact-active toc-link level3">04、OSS</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/windows-codingmore-run.html#_05、codingmore-admin" class="router-link-active router-link-exact-active toc-link level3">05、codingmore-admin</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/windows-codingmore-run.html#_06、codingmore-web" class="router-link-active router-link-exact-active toc-link level3">06、codingmore-web</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/windows-codingmore-run.html#_07、codingmore-admin-web" class="router-link-active router-link-exact-active toc-link level3">07、codingmore-admin-web</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h2 id="前置环境的准备" tabindex="-1"><a class="header-anchor" href="#前置环境的准备" aria-hidden="true">#</a> 前置环境的准备</h2><ul><li>一台可以开机的电脑</li><li>JDK 8</li><li>Maven</li><li>Intellij IDEA（非必须，可用 Eclipse）</li><li>Visual Studio Code（非必须，可用 hbuilderx）</li><li>MySQL</li><li>Redis（非必须，会报错，但不影响跑）</li><li>OSS（非必须，上传图片时报错，但不影响跑）</li></ul><p>对，编程喵 🐱（Spring Boot+Vue 的前后端分离项目）要想在本地跑起来，需要这 8 个前置环境。</p><p>第一个条件，一台可以开机的电脑，显然我相信大家都是有的。不然怎么学编程是吧？瞧我这废话真多。</p><p>这篇先以 Windows 为例，<a href="https://tobebetterjavaer.com/springboot/macos-codingmore-run.html" target="_blank" rel="noopener noreferrer">macOS系统<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>戳这个链接。下图是我的备用机小米笔记本的配置。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-de0cd3fc-6120-46b3-bf3d-0d67af8f7065.png" alt=""></p><p>第二个条件，JDK 8，可以通过 <a href="https://tobebetterjavaer.com/gongju/choco.html" target="_blank" rel="noopener noreferrer">Chocolatey<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>（Windows 软件包管理器）安装，非常方便（前提条件是你得科学上网，否则速度会非常慢，如果不能科学上网我也会提供另外一种常规的方式）。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-c6463fd3-ad81-46e9-9517-95591d506f32.png" alt=""></p><p>执行 <code>choco -v</code> 可以查看 Chocolatey 版本。记得一定要以<strong>管理员身份运行</strong>，否则可以拿不到安装权限。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-64a79f60-3faa-40d2-82d8-2aa2f3cab465.png" alt=""></p><p>执行 <code>choco install jdk8</code> 可以安装 JDK 8 了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-32b4a0f0-e5bb-40ff-b38f-c170a74a3f32.png" alt=""></p><p>执行 <code>java -version</code> 可以查看当前 JDK 版本</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-ec911794-8d5f-41a8-accb-c61852a04960.png" alt=""></p><p>使用 Chocolatey 安装 JDK 的好处就是不需要再配置环境变量。</p><p>如果没有安装 chocolatey 的话（或者没有外网权限的话），可以戳 <a href="https://www.oracle.com/java/technologies/javase/javase8-archive-downloads.html" target="_blank" rel="noopener noreferrer">Downloads - Java SE 8 (oracle.com)<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a> 下载 JDK 8。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-904d9d6f-6451-45e5-a723-f84c5ee53268.png" alt=""></p><p>之后一步步安装完成后，再配置一下环境变量就OK了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-aa883b95-0be0-4d11-8a16-66fddaf28cce.png" alt=""></p><p>第三个条件，Maven，可以直接通过 <code>choco install maven</code> 来完成安装。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-c1e2000e-3312-4ae5-b5dc-a182ed69ff90.png" alt=""></p><p>也可以戳 <a href="https://maven.apache.org/download.cgi" target="_blank" rel="noopener noreferrer">Maven – Download Apache Maven<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a> 下载免安装版。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-16a4e3ca-ef8b-4261-8082-1804361277c4.png" alt=""></p><p>之后配置到环境变量中。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-fcfcdb9f-bb03-4fa9-a936-0b7c3fad9163.png" alt=""></p><p>通过 <code>mvn -v</code> 来查看版本。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-ce54cde6-6e29-4534-bc8b-e98f8f4c5f68.png" alt=""></p><p>为了加快项目依赖包的下载速度，我们需要配置 Maven 的国内镜像源。</p><p>找到 Maven Home（<code>D:\download\apache-maven-3.8.5-bin\apache-maven-3.8.5</code>），复制一份 settings.xml。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-ef585110-3879-463f-989a-2da6d3b37a85.png" alt=""></p><p>到 <code>C:\Users\yours\.m2</code> 路径下。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-94b52707-c692-43fc-a97f-04782b4428f4.png" alt=""></p><p>打开 settings.xml 文件在 mirrors 节点下添加阿里云镜像地址，并保存。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;mirror&gt;
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class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->如何在本地（Windows环境）跑起来编程喵（Spring Boot+Vue）项目源码？</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" 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145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 10 分钟</span><meta property="timeRequired" content="PT10M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/windows-codingmore-run.html#前置环境的准备" class="router-link-active router-link-exact-active toc-link level2">前置环境的准备</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/windows-codingmore-run.html#下载编程喵-codingmore-源码" class="router-link-active router-link-exact-active toc-link level2">下载编程喵（codingmore）源码</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/windows-codingmore-run.html#部署编程喵-codingmore-源码" class="router-link-active router-link-exact-active toc-link level2">部署编程喵（codingmore）源码</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/windows-codingmore-run.html#_01、mysql" class="router-link-active router-link-exact-active toc-link level3">01、MySQL</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/windows-codingmore-run.html#_02、redis" class="router-link-active router-link-exact-active toc-link level3">02、Redis</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/windows-codingmore-run.html#_04、oss" class="router-link-active router-link-exact-active toc-link level3">04、OSS</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/windows-codingmore-run.html#_05、codingmore-admin" class="router-link-active router-link-exact-active toc-link level3">05、codingmore-admin</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/windows-codingmore-run.html#_06、codingmore-web" class="router-link-active router-link-exact-active toc-link level3">06、codingmore-web</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/windows-codingmore-run.html#_07、codingmore-admin-web" class="router-link-active router-link-exact-active toc-link level3">07、codingmore-admin-web</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h2 id="前置环境的准备" tabindex="-1"><a class="header-anchor" href="#前置环境的准备" aria-hidden="true">#</a> 前置环境的准备</h2><ul><li>一台可以开机的电脑</li><li>JDK 8</li><li>Maven</li><li>Intellij IDEA（非必须，可用 Eclipse）</li><li>Visual Studio Code（非必须，可用 hbuilderx）</li><li>MySQL</li><li>Redis（非必须，会报错，但不影响跑）</li><li>OSS（非必须，上传图片时报错，但不影响跑）</li></ul><p>对，编程喵 🐱（Spring Boot+Vue 的前后端分离项目）要想在本地跑起来，需要这 8 个前置环境。</p><p>第一个条件，一台可以开机的电脑，显然我相信大家都是有的。不然怎么学编程是吧？瞧我这废话真多。</p><p>这篇先以 Windows 为例，<a href="https://tobebetterjavaer.com/springboot/macos-codingmore-run.html" target="_blank" rel="noopener noreferrer">macOS系统<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>戳这个链接。下图是我的备用机小米笔记本的配置。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-de0cd3fc-6120-46b3-bf3d-0d67af8f7065.png" alt=""></p><p>第二个条件，JDK 8，可以通过 <a href="https://tobebetterjavaer.com/gongju/choco.html" target="_blank" rel="noopener noreferrer">Chocolatey<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>（Windows 软件包管理器）安装，非常方便（前提条件是你得科学上网，否则速度会非常慢，如果不能科学上网我也会提供另外一种常规的方式）。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-c6463fd3-ad81-46e9-9517-95591d506f32.png" alt=""></p><p>执行 <code>choco -v</code> 可以查看 Chocolatey 版本。记得一定要以<strong>管理员身份运行</strong>，否则可以拿不到安装权限。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-64a79f60-3faa-40d2-82d8-2aa2f3cab465.png" alt=""></p><p>执行 <code>choco install jdk8</code> 可以安装 JDK 8 了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-32b4a0f0-e5bb-40ff-b38f-c170a74a3f32.png" alt=""></p><p>执行 <code>java -version</code> 可以查看当前 JDK 版本</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-ec911794-8d5f-41a8-accb-c61852a04960.png" alt=""></p><p>使用 Chocolatey 安装 JDK 的好处就是不需要再配置环境变量。</p><p>如果没有安装 chocolatey 的话（或者没有外网权限的话），可以戳 <a href="https://www.oracle.com/java/technologies/javase/javase8-archive-downloads.html" target="_blank" rel="noopener noreferrer">Downloads - Java SE 8 (oracle.com)<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a> 下载 JDK 8。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-904d9d6f-6451-45e5-a723-f84c5ee53268.png" alt=""></p><p>之后一步步安装完成后，再配置一下环境变量就OK了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-aa883b95-0be0-4d11-8a16-66fddaf28cce.png" alt=""></p><p>第三个条件，Maven，可以直接通过 <code>choco install maven</code> 来完成安装。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-c1e2000e-3312-4ae5-b5dc-a182ed69ff90.png" alt=""></p><p>也可以戳 <a href="https://maven.apache.org/download.cgi" target="_blank" rel="noopener noreferrer">Maven – Download Apache Maven<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a> 下载免安装版。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-16a4e3ca-ef8b-4261-8082-1804361277c4.png" alt=""></p><p>之后配置到环境变量中。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-fcfcdb9f-bb03-4fa9-a936-0b7c3fad9163.png" alt=""></p><p>通过 <code>mvn -v</code> 来查看版本。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-ce54cde6-6e29-4534-bc8b-e98f8f4c5f68.png" alt=""></p><p>为了加快项目依赖包的下载速度，我们需要配置 Maven 的国内镜像源。</p><p>找到 Maven Home（<code>D:\download\apache-maven-3.8.5-bin\apache-maven-3.8.5</code>），复制一份 settings.xml。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-ef585110-3879-463f-989a-2da6d3b37a85.png" alt=""></p><p>到 <code>C:\Users\yours\.m2</code> 路径下。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-94b52707-c692-43fc-a97f-04782b4428f4.png" alt=""></p><p>打开 settings.xml 文件在 mirrors 节点下添加阿里云镜像地址，并保存。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;mirror&gt;
   &lt;id&gt;alimaven&lt;/id&gt;
   &lt;name&gt;aliyun maven&lt;/name&gt;
 &lt;url&gt;http://maven.aliyun.com/nexus/content/groups/public/&lt;/url&gt;
   &lt;mirrorOf&gt;central&lt;/mirrorOf&gt;
 &lt;/mirror&gt;
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>第四个条件，Intellij IDEA，Java 后端开发必备神器，可以安装社区版，也可以安装旗舰版。</p><blockquote><p><a href="https://www.jetbrains.com/zh-cn/idea/download/#section=mac" target="_blank" rel="noopener noreferrer">https://www.jetbrains.com/zh-cn/idea/download/#section=mac<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-91ef4d6f-2274-4276-85ea-467e163d9632.png" alt=""></p><p>第五个条件，Visual Studio Code，在编写前端代码（vue、JavaScript、css 等）时，比 Intellij IDEA 更值得信赖。</p><blockquote><p><a href="https://code.visualstudio.com/" target="_blank" rel="noopener noreferrer">https://code.visualstudio.com/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-d3a51721-55b4-4f3e-8f64-f447ea78f5eb.png" alt=""></p><p>第六个条件，MySQL，可以通过执行 <code>choco install mysql.installer</code> 在本机上安装 MySql 的工具箱。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-506b6fb6-b987-429e-bacc-109d75e397a5.png" alt=""></p><p>也可以戳 <a href="https://dev.mysql.com/downloads/installer/" target="_blank" rel="noopener noreferrer">MySQL :: Download MySQL Installer<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a> 直接下载 MySql的工具箱。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-270a832d-1e72-4d0b-9eb1-22a6d00070c3.png" alt=""></p><p>之后通过 MySql工具箱来安装 MySQL。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-9fe18b13-23a3-4f93-a198-630147fc5271.png" alt=""></p><p>如果觉得这个过程比较麻烦的话，也可以直接执行 <code>choco install mysql</code> 来安装MySQL。</p><p>也可以戳 <a href="https://dev.mysql.com/downloads/mysql/" target="_blank" rel="noopener noreferrer">MySQL :: Download MySQL Community Server<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a> 下载MySQL安装包。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-b04bab72-02f4-480a-8d56-fa18e723c489.png" alt=""></p><p>安装（记住MySQL的用户名和密码）完成后，可以在计算机管理面板里找到 MySQL 服务。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-25333d10-c440-43cd-a0c8-1b993e6124a5.png" alt=""></p><p>第七个条件，Redis，可以直接通过 <code>choco install redis</code> 来完成安装。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-193ab37e-cf9d-42c4-9040-5e63291f16fc.png" alt=""></p><p>也可以戳 <a href="https://github.com/microsoftarchive/redis/releases" target="_blank" rel="noopener noreferrer">Releases · microsoftarchive/redis · GitHub<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a> 下载 Redis。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-c8537814-8106-4922-8b69-8fe6f529124f.png" alt=""></p><p>下载完直接安装。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-9584146f-53ea-4c70-b642-790be87c6fc6.png" alt=""></p><p>安装完成后，可以在计算机管理面板里找到Redis服务。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-5532c69b-d3f5-4661-941e-4aa6586465f6.png" alt=""></p><p>如果下载的是绿色版免安装版，只需要把 zip 包解压就可以了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-56d7f66e-bcf2-4f2a-aaf7-45753560ccf9.png" alt=""></p><p>在解压目录下，你会发现一份叫 Windows Service Documentation.docx 的文件，里面详细地说明了 Redis 服务的注册/卸载方式，以及启动/停止方式。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-b87239ff-626a-476a-bf5b-fb88a43c82ea.png" alt=""></p><p>复制对应命令在 CMD 命令行下执行就OK了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-a5d8eae8-2119-432d-becc-bb8d12de9990.png" alt=""></p><p>第八个条件，OSS，主要用来保存图片，可以通过阿里云官方去购买服务，并且创建 Bucket。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-cb006c06-dea5-4a6d-b628-2234a6ae4544.png" alt=""></p><p>然后配置 AccessKey。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-5eb6385b-2098-4d99-b53d-ff0aff188dcc.png" alt=""></p><p>针对<a href="https://tobebetterjavaer.com/zhishixingqiu/" target="_blank" rel="noopener noreferrer">星球用户<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，我会开放自己的 accessKeyId 和 accessKeySecret，请勿外泄，免得被恶意攻击。</p><h2 id="下载编程喵-codingmore-源码" tabindex="-1"><a class="header-anchor" href="#下载编程喵-codingmore-源码" aria-hidden="true">#</a> 下载编程喵（codingmore）源码</h2><p>编程喵一共有三个仓库，分别是：</p><blockquote><ul><li>coding-more：编程喵 admin 后端 + Web 前后端，GitHub 地址：<a href="https://github.com/itwanger/coding-more" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/coding-more<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li>codingmore-admin-web：编程喵 admin 前端，地址：<a href="https://github.com/itwanger/codingmore-admin-web" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/codingmore-admin-web<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li>codingmore-learning：编程喵学习教程（手把手），地址：<a href="https://github.com/itwanger/codingmore-learning" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/codingmore-learning<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-cec75240-143b-48c5-b4b6-73127bf3f3d5.png" alt=""></p><p>编程喵 🐱 是一个非常纯粹的前后端分离项目，后端用到的技术包括：</p><ul><li>Spring Boot 容器+MVC 框架</li><li>SpringSecurity 认证和授权框架</li><li>MyBatis ORM 框架</li><li>MyBatis-Plus MyBatis 增强工具</li><li>Nginx 静态资源服务器</li><li>Druid 数据库连接池</li><li>OSS 对象存储</li><li>Redis 缓存中间件</li><li>MySQL 关系型数据库</li><li>Swagger-UI 文档生成工具</li><li>Knife4j Swagger 美化增强工具</li><li>Hibernator-Validator 验证框架</li><li>Logback 日志框架</li><li>Lombok 简化对象封装工具</li><li>Hutool Java 工具类库</li></ul><p>前端用到的技术包括：</p><ul><li>Vue 前端框架</li><li>Vue-router 路由框架</li><li>Vuex 全局状态管理框架</li><li>Element 前端 UI 框架</li><li>Axios 前端 HTTP 框架</li><li>Js-cookie cookie 管理工具</li><li>nprogress 进度条控件</li></ul><p><strong>第一步，下载 coding-more 源码</strong>，戳<a href="https://github.com/itwanger/coding-more" target="_blank" rel="noopener noreferrer">链接 🔗<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>进入到该页面。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-6e566f22-0d5e-4cd4-a13c-b933afd60c94.png" alt=""></p><p>第二步，如果安装有 GitHub 桌面版的话，可以点击「open with GitHub desktop」，也可以在这一步下载安装GitHub 桌面版。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-8e4680eb-e382-469a-afd2-be0c39cedacf.png" alt=""></p><p>也可以点击「download zip」。</p><p>第三步，通过 Intellij IDEA 导入新项目就可以了，第一次导入的话，需要等待Maven下载依赖包。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-e8918efd-d419-44f2-a118-f2d2d01143ae.png" alt=""></p><p>第四步，下载 codingmore-admin-web 源码，戳<a href="https://github.com/itwanger/codingmore-admin-web" target="_blank" rel="noopener noreferrer">链接 🔗<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>进入到该页面。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-9fa980b0-ce8d-4815-86fb-df7684bc7656.png" alt=""></p><p>源码下载完毕后，建议通过 VS Code 导入项目，VS Code 对前端项目比 Intellij IDEA 更加友好。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-60efa629-f28a-4538-8c9a-0e329f0e7fbb.png" alt=""></p><h2 id="部署编程喵-codingmore-源码" tabindex="-1"><a class="header-anchor" href="#部署编程喵-codingmore-源码" aria-hidden="true">#</a> 部署编程喵（codingmore）源码</h2><h3 id="_01、mysql" tabindex="-1"><a class="header-anchor" href="#_01、mysql" aria-hidden="true">#</a> 01、MySQL</h3><p>第一步，安装 Navicat，这是一个图形化界面的数据库管理工具。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-6ec673cd-6fa8-42e5-b8a0-1c1db8d4d910.png" alt=""></p><p>安装完毕后，输入 MySQL 数据库的用户名和密码，建立本地连接。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-da4607d1-2cc9-4a31-8229-aec365c82b5e.png" alt=""></p><p>第二步，打开链接，新建数据库 codingmore，导入编程喵的 DB 文件。DB 文件放在 coding-more/doc 目录下。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-c4af52b2-593a-470e-8e68-1024462bd5db.png" alt=""></p><p>导入成功后，可以看到目前 codingmore 所用到的 27 个数据库文件，其中 qrtz 开头的是定时任务的持久化表，剩余是编程喵的数据库表文件。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-e16bebba-a33e-4a5c-a21a-23b25672397e.png" alt=""></p><p>然后，修改 <code>codingmore-admin/src/main/resources/application-dev.yml</code> 文件中的 spring.datasource.username、password、url 等，该为你本地的用户名、密码和数据库链接地址（Web 管理端）。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-51f61012-ca37-4042-ab74-52c986ba9e79.png" alt=""></p><p>修改 <code>codingmore-web/src/main/resources/application-dev.yml</code> 文件中的 spring.datasource.username、password、url 等，该为你本地的用户名、密码和数据库链接地址（Web 前端）。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-0bbf97db-a413-4812-bc75-0246c60dc448.png" alt=""></p><h3 id="_02、redis" tabindex="-1"><a class="header-anchor" href="#_02、redis" aria-hidden="true">#</a> 02、Redis</h3><p>在计算机管理面板里启动Redis服务。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-f8573f28-4f60-486b-9266-11d1c18a6f0c.png" alt=""></p><p>然后，修改 <code>codingmore-admin/src/main/resources/application-dev.yml</code> 文件中的 spring.redis.host、database、port、password、timeout 等，该为你本地的 Redis 链接信息，一般默认就好（Web 管理端）。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-c6ea7923-9f6a-49a8-88bc-3d32d84386ab.png" alt=""></p><p>修改 <code>codingmore-web/src/main/resources/application-dev.yml</code> 文件中的 spring.redis.host、database、port、password、timeout 等，该为你本地的 Redis 链接信息，一般默认就好（Web 前端）。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-e12a52ca-f961-401a-9429-1c7b63987c53.png" alt=""></p><h3 id="_04、oss" tabindex="-1"><a class="header-anchor" href="#_04、oss" aria-hidden="true">#</a> 04、OSS</h3><p>非<a href="https://tobebetterjavaer.com/zhishixingqiu/" target="_blank" rel="noopener noreferrer">星球用户<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>需要自己购买阿里云的 OSS 服务和 CDN 服务。<a href="https://tobebetterjavaer.com/zhishixingqiu/" target="_blank" rel="noopener noreferrer">星球用户<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>可以直接私信我获取 accessKeyId 和 accessKeySecret。</p><p>然后修改 <code>codingmore-admin/src/main/resources/application-dev.yml</code> 文件中的 aliyun.cdn、oss 等。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-9d511d46-5865-43b4-8d54-02217b534d98.png" alt=""></p><h3 id="_05、codingmore-admin" tabindex="-1"><a class="header-anchor" href="#_05、codingmore-admin" aria-hidden="true">#</a> 05、codingmore-admin</h3><p>在 Intellij IDEA 中运行 CodingmoreAdminBootstrap 主类，启动管理端后台服务。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-0fcdf421-9e30-4b1d-8da0-23e33db21070.png" alt=""></p><p>如果编译失败，注意调整 JDK 版本为 Java 8。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-eb63259f-80ae-4f33-b3fb-e634c05b8835.png" alt=""></p><h3 id="_06、codingmore-web" tabindex="-1"><a class="header-anchor" href="#_06、codingmore-web" aria-hidden="true">#</a> 06、codingmore-web</h3><p>在 Intellij IDEA 中运行 CodingmoreAdminBootstrap 主类，启动管理端后台服务。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-e95c9654-3ed4-4fc1-9847-47ea534cf553.png" alt=""></p><p>启动后，可以直接在浏览器地址栏输入 <code>http://localhost:8081</code> 访问 Web 前端。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-9249fe0d-4529-4825-96ef-7d79e551907e.png" alt=""></p><h3 id="_07、codingmore-admin-web" tabindex="-1"><a class="header-anchor" href="#_07、codingmore-admin-web" aria-hidden="true">#</a> 07、codingmore-admin-web</h3><p>在 vscode 中打开终端，执行 <code>yarn install</code> 添加项目依赖（yarn 是 Facebook 为 node.js 运行时环境开发软件打包工具，是 npm 软件包管理器的替代品）。</p><p>如果没有安装 yarn 的话，会出现以下错误。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-8a24c4c1-d5c4-475e-9445-13194a5c7ade.png" alt=""></p><p>可以直接以管理员模式执行 <code>choco install yarn</code> 来安装 yarn 包。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-3d7609c2-bcd0-40e0-a0fb-3ebf1e38a8e1.png" alt=""></p><p>如果没有安装 chocolatey 的话，需要戳 <a href="https://nodejs.org/en/download/" target="_blank" rel="noopener noreferrer">Download | Node.js (nodejs.org)<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a> 先安装node.js：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-076618e3-6632-44f4-ba9c-88c400c8cdc1.png" alt=""></p><p>强烈推荐大家安装 chocolatey，安装 node.js 的时候也会出现 chocolatey的影子。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-2660c700-f4de-46b8-86bd-b12b6e5a81eb.png" alt=""></p><p>再执行 <code>npm install -g yarn</code> 来安装 yarn。安装成功后，重新打开 vscode，执行 <code>yarn -v</code> 就可以查看 yarn 的版本了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-78a73357-72f9-4d25-88d2-0e723547514f.png" alt=""></p><p>再次执行 <code>yarn install</code> 安装前端环境。之后执行 <code>yarn run dev</code> 编译 admin 前端。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-39e0219b-273f-4a5d-89d1-4dc74d606cd7.png" alt=""></p><p>在浏览器地址栏输入 <code>http://localhost:8080</code> 就可以访问到了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-331f1cc4-f52a-4bcd-8e7b-692a7b822e9a.png" alt=""></p><p>可以点击「获取体验账号」的方式获取登录用户名和密码。当然了，你也可以直接在 users 表上暴力破解密码。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-fd88b4eb-ed76-4e23-83eb-c5e830d354eb.png" alt=""></p><p><a href="https://tobebetterjavaer.com/zhishixingqiu/" target="_blank" rel="noopener noreferrer">星球用户<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>可以直接私信我获取超级管理员的密码。登录后就可以看到文章列表啦。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-91ce8f87-dd9a-458a-b6c4-02880c34b7c7.png" alt=""></p><p>这是文章编辑页，是不是非常清爽？</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-4094a45f-7aa9-4b9a-a39e-29a8a17d95ba.png" alt=""></p><p>好了，<a href="https://tobebetterjavaer.com/springboot/macos-codingmore-run.html" target="_blank" rel="noopener noreferrer">MacOS 版<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>和Windows版如何下载编程喵源码，如何在本地跑起来的整个演示过程就告一段落辣，我们回头见！</p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/springboot/windows-codingmore-run.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/6/8 下午2:51:04</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/springboot/macos-codingmore-run.html" class="nav-link prev" aria-label="macOS下如何运行编程喵源码"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->macOS下如何运行编程喵源码</div></a><!----></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
-    <script type="module" src="/assets/app.a0271b9c.js" defer></script>
+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>第四个条件，Intellij IDEA，Java 后端开发必备神器，可以安装社区版，也可以安装旗舰版。</p><blockquote><p><a href="https://www.jetbrains.com/zh-cn/idea/download/#section=mac" target="_blank" rel="noopener noreferrer">https://www.jetbrains.com/zh-cn/idea/download/#section=mac<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-91ef4d6f-2274-4276-85ea-467e163d9632.png" alt=""></p><p>第五个条件，Visual Studio Code，在编写前端代码（vue、JavaScript、css 等）时，比 Intellij IDEA 更值得信赖。</p><blockquote><p><a href="https://code.visualstudio.com/" target="_blank" rel="noopener noreferrer">https://code.visualstudio.com/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-d3a51721-55b4-4f3e-8f64-f447ea78f5eb.png" alt=""></p><p>第六个条件，MySQL，可以通过执行 <code>choco install mysql.installer</code> 在本机上安装 MySql 的工具箱。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-506b6fb6-b987-429e-bacc-109d75e397a5.png" alt=""></p><p>也可以戳 <a href="https://dev.mysql.com/downloads/installer/" target="_blank" rel="noopener noreferrer">MySQL :: Download MySQL Installer<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a> 直接下载 MySql的工具箱。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-270a832d-1e72-4d0b-9eb1-22a6d00070c3.png" alt=""></p><p>之后通过 MySql工具箱来安装 MySQL。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-9fe18b13-23a3-4f93-a198-630147fc5271.png" alt=""></p><p>如果觉得这个过程比较麻烦的话，也可以直接执行 <code>choco install mysql</code> 来安装MySQL。</p><p>也可以戳 <a href="https://dev.mysql.com/downloads/mysql/" target="_blank" rel="noopener noreferrer">MySQL :: Download MySQL Community Server<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a> 下载MySQL安装包。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-b04bab72-02f4-480a-8d56-fa18e723c489.png" alt=""></p><p>安装（记住MySQL的用户名和密码）完成后，可以在计算机管理面板里找到 MySQL 服务。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-25333d10-c440-43cd-a0c8-1b993e6124a5.png" alt=""></p><p>第七个条件，Redis，可以直接通过 <code>choco install redis</code> 来完成安装。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-193ab37e-cf9d-42c4-9040-5e63291f16fc.png" alt=""></p><p>也可以戳 <a href="https://github.com/microsoftarchive/redis/releases" target="_blank" rel="noopener noreferrer">Releases · microsoftarchive/redis · GitHub<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a> 下载 Redis。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-c8537814-8106-4922-8b69-8fe6f529124f.png" alt=""></p><p>下载完直接安装。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-9584146f-53ea-4c70-b642-790be87c6fc6.png" alt=""></p><p>安装完成后，可以在计算机管理面板里找到Redis服务。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-5532c69b-d3f5-4661-941e-4aa6586465f6.png" alt=""></p><p>如果下载的是绿色版免安装版，只需要把 zip 包解压就可以了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-56d7f66e-bcf2-4f2a-aaf7-45753560ccf9.png" alt=""></p><p>在解压目录下，你会发现一份叫 Windows Service Documentation.docx 的文件，里面详细地说明了 Redis 服务的注册/卸载方式，以及启动/停止方式。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-b87239ff-626a-476a-bf5b-fb88a43c82ea.png" alt=""></p><p>复制对应命令在 CMD 命令行下执行就OK了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-a5d8eae8-2119-432d-becc-bb8d12de9990.png" alt=""></p><p>第八个条件，OSS，主要用来保存图片，可以通过阿里云官方去购买服务，并且创建 Bucket。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-cb006c06-dea5-4a6d-b628-2234a6ae4544.png" alt=""></p><p>然后配置 AccessKey。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-5eb6385b-2098-4d99-b53d-ff0aff188dcc.png" alt=""></p><p>针对<a href="https://tobebetterjavaer.com/zhishixingqiu/" target="_blank" rel="noopener noreferrer">星球用户<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，我会开放自己的 accessKeyId 和 accessKeySecret，请勿外泄，免得被恶意攻击。</p><h2 id="下载编程喵-codingmore-源码" tabindex="-1"><a class="header-anchor" href="#下载编程喵-codingmore-源码" aria-hidden="true">#</a> 下载编程喵（codingmore）源码</h2><p>编程喵一共有三个仓库，分别是：</p><blockquote><ul><li>coding-more：编程喵 admin 后端 + Web 前后端，GitHub 地址：<a href="https://github.com/itwanger/coding-more" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/coding-more<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li>codingmore-admin-web：编程喵 admin 前端，地址：<a href="https://github.com/itwanger/codingmore-admin-web" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/codingmore-admin-web<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li>codingmore-learning：编程喵学习教程（手把手），地址：<a href="https://github.com/itwanger/codingmore-learning" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/codingmore-learning<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-cec75240-143b-48c5-b4b6-73127bf3f3d5.png" alt=""></p><p>编程喵 🐱 是一个非常纯粹的前后端分离项目，后端用到的技术包括：</p><ul><li>Spring Boot 容器+MVC 框架</li><li>SpringSecurity 认证和授权框架</li><li>MyBatis ORM 框架</li><li>MyBatis-Plus MyBatis 增强工具</li><li>Nginx 静态资源服务器</li><li>Druid 数据库连接池</li><li>OSS 对象存储</li><li>Redis 缓存中间件</li><li>MySQL 关系型数据库</li><li>Swagger-UI 文档生成工具</li><li>Knife4j Swagger 美化增强工具</li><li>Hibernator-Validator 验证框架</li><li>Logback 日志框架</li><li>Lombok 简化对象封装工具</li><li>Hutool Java 工具类库</li></ul><p>前端用到的技术包括：</p><ul><li>Vue 前端框架</li><li>Vue-router 路由框架</li><li>Vuex 全局状态管理框架</li><li>Element 前端 UI 框架</li><li>Axios 前端 HTTP 框架</li><li>Js-cookie cookie 管理工具</li><li>nprogress 进度条控件</li></ul><p><strong>第一步，下载 coding-more 源码</strong>，戳<a href="https://github.com/itwanger/coding-more" target="_blank" rel="noopener noreferrer">链接 🔗<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>进入到该页面。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-6e566f22-0d5e-4cd4-a13c-b933afd60c94.png" alt=""></p><p>第二步，如果安装有 GitHub 桌面版的话，可以点击「open with GitHub desktop」，也可以在这一步下载安装GitHub 桌面版。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-8e4680eb-e382-469a-afd2-be0c39cedacf.png" alt=""></p><p>也可以点击「download zip」。</p><p>第三步，通过 Intellij IDEA 导入新项目就可以了，第一次导入的话，需要等待Maven下载依赖包。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-e8918efd-d419-44f2-a118-f2d2d01143ae.png" alt=""></p><p>第四步，下载 codingmore-admin-web 源码，戳<a href="https://github.com/itwanger/codingmore-admin-web" target="_blank" rel="noopener noreferrer">链接 🔗<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>进入到该页面。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-9fa980b0-ce8d-4815-86fb-df7684bc7656.png" alt=""></p><p>源码下载完毕后，建议通过 VS Code 导入项目，VS Code 对前端项目比 Intellij IDEA 更加友好。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-60efa629-f28a-4538-8c9a-0e329f0e7fbb.png" alt=""></p><h2 id="部署编程喵-codingmore-源码" tabindex="-1"><a class="header-anchor" href="#部署编程喵-codingmore-源码" aria-hidden="true">#</a> 部署编程喵（codingmore）源码</h2><h3 id="_01、mysql" tabindex="-1"><a class="header-anchor" href="#_01、mysql" aria-hidden="true">#</a> 01、MySQL</h3><p>第一步，安装 Navicat，这是一个图形化界面的数据库管理工具。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-6ec673cd-6fa8-42e5-b8a0-1c1db8d4d910.png" alt=""></p><p>安装完毕后，输入 MySQL 数据库的用户名和密码，建立本地连接。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-da4607d1-2cc9-4a31-8229-aec365c82b5e.png" alt=""></p><p>第二步，打开链接，新建数据库 codingmore，导入编程喵的 DB 文件。DB 文件放在 coding-more/doc 目录下。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-c4af52b2-593a-470e-8e68-1024462bd5db.png" alt=""></p><p>导入成功后，可以看到目前 codingmore 所用到的 27 个数据库文件，其中 qrtz 开头的是定时任务的持久化表，剩余是编程喵的数据库表文件。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-e16bebba-a33e-4a5c-a21a-23b25672397e.png" alt=""></p><p>然后，修改 <code>codingmore-admin/src/main/resources/application-dev.yml</code> 文件中的 spring.datasource.username、password、url 等，该为你本地的用户名、密码和数据库链接地址（Web 管理端）。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-51f61012-ca37-4042-ab74-52c986ba9e79.png" alt=""></p><p>修改 <code>codingmore-web/src/main/resources/application-dev.yml</code> 文件中的 spring.datasource.username、password、url 等，该为你本地的用户名、密码和数据库链接地址（Web 前端）。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-0bbf97db-a413-4812-bc75-0246c60dc448.png" alt=""></p><h3 id="_02、redis" tabindex="-1"><a class="header-anchor" href="#_02、redis" aria-hidden="true">#</a> 02、Redis</h3><p>在计算机管理面板里启动Redis服务。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-f8573f28-4f60-486b-9266-11d1c18a6f0c.png" alt=""></p><p>然后，修改 <code>codingmore-admin/src/main/resources/application-dev.yml</code> 文件中的 spring.redis.host、database、port、password、timeout 等，该为你本地的 Redis 链接信息，一般默认就好（Web 管理端）。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-c6ea7923-9f6a-49a8-88bc-3d32d84386ab.png" alt=""></p><p>修改 <code>codingmore-web/src/main/resources/application-dev.yml</code> 文件中的 spring.redis.host、database、port、password、timeout 等，该为你本地的 Redis 链接信息，一般默认就好（Web 前端）。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-e12a52ca-f961-401a-9429-1c7b63987c53.png" alt=""></p><h3 id="_04、oss" tabindex="-1"><a class="header-anchor" href="#_04、oss" aria-hidden="true">#</a> 04、OSS</h3><p>非<a href="https://tobebetterjavaer.com/zhishixingqiu/" target="_blank" rel="noopener noreferrer">星球用户<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>需要自己购买阿里云的 OSS 服务和 CDN 服务。<a href="https://tobebetterjavaer.com/zhishixingqiu/" target="_blank" rel="noopener noreferrer">星球用户<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>可以直接私信我获取 accessKeyId 和 accessKeySecret。</p><p>然后修改 <code>codingmore-admin/src/main/resources/application-dev.yml</code> 文件中的 aliyun.cdn、oss 等。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-9d511d46-5865-43b4-8d54-02217b534d98.png" alt=""></p><h3 id="_05、codingmore-admin" tabindex="-1"><a class="header-anchor" href="#_05、codingmore-admin" aria-hidden="true">#</a> 05、codingmore-admin</h3><p>在 Intellij IDEA 中运行 CodingmoreAdminBootstrap 主类，启动管理端后台服务。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-0fcdf421-9e30-4b1d-8da0-23e33db21070.png" alt=""></p><p>如果编译失败，注意调整 JDK 版本为 Java 8。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-eb63259f-80ae-4f33-b3fb-e634c05b8835.png" alt=""></p><h3 id="_06、codingmore-web" tabindex="-1"><a class="header-anchor" href="#_06、codingmore-web" aria-hidden="true">#</a> 06、codingmore-web</h3><p>在 Intellij IDEA 中运行 CodingmoreAdminBootstrap 主类，启动管理端后台服务。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-e95c9654-3ed4-4fc1-9847-47ea534cf553.png" alt=""></p><p>启动后，可以直接在浏览器地址栏输入 <code>http://localhost:8081</code> 访问 Web 前端。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-9249fe0d-4529-4825-96ef-7d79e551907e.png" alt=""></p><h3 id="_07、codingmore-admin-web" tabindex="-1"><a class="header-anchor" href="#_07、codingmore-admin-web" aria-hidden="true">#</a> 07、codingmore-admin-web</h3><p>在 vscode 中打开终端，执行 <code>yarn install</code> 添加项目依赖（yarn 是 Facebook 为 node.js 运行时环境开发软件打包工具，是 npm 软件包管理器的替代品）。</p><p>如果没有安装 yarn 的话，会出现以下错误。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-8a24c4c1-d5c4-475e-9445-13194a5c7ade.png" alt=""></p><p>可以直接以管理员模式执行 <code>choco install yarn</code> 来安装 yarn 包。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-3d7609c2-bcd0-40e0-a0fb-3ebf1e38a8e1.png" alt=""></p><p>如果没有安装 chocolatey 的话，需要戳 <a href="https://nodejs.org/en/download/" target="_blank" rel="noopener noreferrer">Download | Node.js (nodejs.org)<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a> 先安装node.js：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-076618e3-6632-44f4-ba9c-88c400c8cdc1.png" alt=""></p><p>强烈推荐大家安装 chocolatey，安装 node.js 的时候也会出现 chocolatey的影子。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-2660c700-f4de-46b8-86bd-b12b6e5a81eb.png" alt=""></p><p>再执行 <code>npm install -g yarn</code> 来安装 yarn。安装成功后，重新打开 vscode，执行 <code>yarn -v</code> 就可以查看 yarn 的版本了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-78a73357-72f9-4d25-88d2-0e723547514f.png" alt=""></p><p>再次执行 <code>yarn install</code> 安装前端环境。之后执行 <code>yarn run dev</code> 编译 admin 前端。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-39e0219b-273f-4a5d-89d1-4dc74d606cd7.png" alt=""></p><p>在浏览器地址栏输入 <code>http://localhost:8080</code> 就可以访问到了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-331f1cc4-f52a-4bcd-8e7b-692a7b822e9a.png" alt=""></p><p>可以点击「获取体验账号」的方式获取登录用户名和密码。当然了，你也可以直接在 users 表上暴力破解密码。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-fd88b4eb-ed76-4e23-83eb-c5e830d354eb.png" alt=""></p><p><a href="https://tobebetterjavaer.com/zhishixingqiu/" target="_blank" rel="noopener noreferrer">星球用户<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>可以直接私信我获取超级管理员的密码。登录后就可以看到文章列表啦。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-91ce8f87-dd9a-458a-b6c4-02880c34b7c7.png" alt=""></p><p>这是文章编辑页，是不是非常清爽？</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/windows-codingmore-run-4094a45f-7aa9-4b9a-a39e-29a8a17d95ba.png" alt=""></p><p>好了，<a href="https://tobebetterjavaer.com/springboot/macos-codingmore-run.html" target="_blank" rel="noopener noreferrer">MacOS 版<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>和Windows版如何下载编程喵源码，如何在本地跑起来的整个演示过程就告一段落辣，我们回头见！</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/springboot/windows-codingmore-run.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/6/10 下午7:28:25</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/springboot/macos-codingmore-run.html" class="nav-link prev" aria-label="macOS下如何运行编程喵源码"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->macOS下如何运行编程喵源码</div></a><!----></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 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class="title">2.4 字符串&amp;数组</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/string/immutable.html" class="nav-link sidebar-link sidebar-page" aria-label="字符串为什么是不可变的"><!---->字符串为什么是不可变的<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/string/constant-pool.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="字符串常量池"><!---->字符串常量池<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/string/intern.html" class="nav-link sidebar-link sidebar-page" aria-label=" String#intern"><!----> String#intern<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/string/equals.html" class="nav-link sidebar-link sidebar-page" aria-label="字符串比较"><!---->字符串比较<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/string/join.html" class="nav-link sidebar-link sidebar-page" aria-label="字符串拼接"><!---->字符串拼接<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/string/split.html" class="nav-link sidebar-link sidebar-page" aria-label="字符串分割"><!---->字符串分割<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/array/array.html" class="nav-link sidebar-link sidebar-page" aria-label="数组"><!---->数组<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/array/print.html" class="nav-link sidebar-link sidebar-page" aria-label="打印数组"><!---->打印数组<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.5 集合框架（容器）</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.6 IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.11 并发编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->深入了解Java字符串常量池</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" 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class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->深入了解Java字符串常量池</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 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4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 4 分钟</span><meta property="timeRequired" content="PT4M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="深入了解java字符串常量池" tabindex="-1"><a class="header-anchor" href="#深入了解java字符串常量池" aria-hidden="true">#</a> 深入了解Java字符串常量池</h1><p>“三妹，今天我们来学习一下字符串常量池吧，这是字符串中非常关键的一个知识点。”我话音未落，青岛路小学那边传来了嘹亮的歌声就钻进了我的耳朵，“唱 ~ 山 ~ 歌 ~”</p><p>三妹说，“好呀，开始吧，哥。”</p><p>“先从这道面试题开始吧！”</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">String</span> s <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">String</span><span class="token punctuation">(</span><span class="token string">&quot;二哥&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>“这行代码创建了几个对象？”</p><p>“不就一个吗？”三妹不假思索地回答。</p><p>“不，两个！”我直接否定了三妹的答案，“使用 new 关键字创建一个字符串对象时，Java 虚拟机会先在字符串常量池中查找有没有‘二哥’这个字符串对象，如果有，就不会在字符串常量池中创建‘二哥’这个对象了，直接在堆中创建一个‘二哥’的字符串对象，然后将堆中这个‘二哥’的对象地址返回赋值给变量 s。”</p><p>“如果没有，先在字符串常量池中创建一个‘二哥’的字符串对象，然后再在堆中创建一个‘二哥’的字符串对象，然后将堆中这个‘二哥’的字符串对象地址返回赋值给变量 s。”</p><p>“为什么要先在字符串常量池中创建对象，然后再在堆上创建呢？这样不就多此一举了？”三妹敏锐地发现了问题。</p><p>我回答，“由于字符串的使用频率实在是太高了，所以 Java 虚拟机为了提高性能和减少内存开销，在创建字符串对象的时候进行了一些优化，特意为字符串开辟了一个字符串常量池。”</p><p>通常情况下，我们会采用双引号的方式来创建字符串对象，而不是通过 new 关键字的方式：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">String</span> s <span class="token operator">=</span> <span class="token string">&quot;三妹&quot;</span><span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>当执行 <code>String s = &quot;三妹&quot;</code> 时，Java 虚拟机会先在字符串常量池中查找有没有“三妹”这个字符串对象，如果有，则不创建任何对象，直接将字符串常量池中这个“三妹”的对象地址返回，赋给变量 s；如果没有，在字符串常量池中创建“三妹”这个对象，然后将其地址返回，赋给变量 s。</p><p>“哦，我明白了，哥。”三妹突然插话到，“有了字符串常量池，就可以通过双引号的方式直接创建字符串对象，不用再通过 new 的方式在堆中创建对象了，对吧？”</p><p>“是滴。new 的方式始终会创建一个对象，不管字符串的内容是否已经存在，而双引号的方式会重复利用字符串常量池中已经存在的对象。”我说。</p><p>来看下面这个例子：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">String</span> s <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">String</span><span class="token punctuation">(</span><span class="token string">&quot;二哥&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 <span class="token class-name">String</span> s1 <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">String</span><span class="token punctuation">(</span><span class="token string">&quot;二哥&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><p>按照我们之前的分析，这两行代码会创建三个对象，字符串常量池中一个，堆上两个。</p><p>再来看下面这个例子：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">String</span> s <span class="token operator">=</span> <span class="token string">&quot;三妹&quot;</span><span class="token punctuation">;</span>
 <span class="token class-name">String</span> s1 <span class="token operator">=</span> <span class="token string">&quot;三妹&quot;</span><span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><p>这两行代码只会创建一个对象，就是字符串常量池中的那个。这样的话，性能肯定就提高了！</p><p>“那哥，字符串常量池在内存中的什么位置呢？”三妹问。</p><p>我说，“三妹，你这个问题问得好呀！”</p><p>在 Java 8 之前，字符串常量池在永久代中。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/string/constant-pool-01.png" alt=""></p><p>Java 8 之后，移除了永久代，字符串常量池就移到了堆中。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/string/constant-pool-02.png" alt=""></p><p>“哥，能再简单给我解释一下方法区，永久代和元空间的概念吗？有点模糊。”三妹说。</p><p>我说，“可以呀。”</p><ul><li>方法区是 Java 虚拟机规范中的一个概念，就像是一个接口吧；</li><li>永久代是 HotSpot 虚拟机中对方法的一个实现，就像是接口的实现类；</li><li>Java 8 的时候，移除了永久代，取而代之的是元空间，是方法区的另外一个实现。</li></ul><p>永久代是放在运行时数据区中的，所以它的大小受到 Java 虚拟机本身大小的限制，所以 Java 8 之前，会经常遇到 <code>java.lang.OutOfMemoryError: PremGen Space</code> 的异常，PremGen Space 就是方法区的意思；而元空间是直接放在内存中的，所以只受本机可用内存的限制，虽然也会发生内存溢出，但出现的几率相对之前就小了很多。</p><p>“明白了吧，三妹？”我问。</p><p>“嗯嗯。”三妹回答。</p><p>“那关于字符串常量池，就先说这么多吧，是不是还挺有意思的。”我说。</p><p>“是的，我现在是彻底搞懂了字符串常量池，哥，你真棒！”三妹说。</p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png"></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/string/constant-pool.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/12 下午4:24:21</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/string/immutable.html" class="nav-link prev" aria-label="字符串为什么是不可变的"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->字符串为什么是不可变的</div></a><a href="/string/intern.html" class="nav-link next" aria-label=" String#intern"><div class="hint">下一页<span class="arrow right"></span></div><div class="link"> String#intern<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 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aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 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aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 6 分钟</span><meta property="timeRequired" content="PT6M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="java判断两个字符串是否相等" tabindex="-1"><a class="header-anchor" href="#java判断两个字符串是否相等" aria-hidden="true">#</a> Java判断两个字符串是否相等？</h1><p>“哥，如何比较两个字符串相等啊？”三妹问。</p><p>“这个问题看似简单，却在 Stack Overflow 上有超过 370 万的访问量。”我说，“这个问题也可以引申为 <code>.equals()</code> 和 ‘==’ 操作符有什么区别。”</p><ul><li>“==”操作符用于比较两个对象的地址是否相等。</li><li><code>.equals()</code> 方法用于比较两个对象的内容是否相等。</li></ul><p>“不是很理解。”三妹感到很困惑。</p><p>“我来举个不恰当又很恰当的例子，一看你就明白了，三妹。”</p><p>有一对双胞胎，姐姐叫阿丽塔，妹妹叫洛丽塔。我们普通人可能完全无法分辨谁是姐姐谁是妹妹，可她们的妈妈却可以轻而易举地辨认出。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/string/equals-01.png" alt=""></p><p><code>.equals()</code> 就好像我们普通人，看见阿丽塔以为是洛丽塔，看见洛丽塔以为是阿丽塔，看起来一样就觉得她们是同一个人；“==”操作符就好像她们的妈妈，要求更严格，观察更细致，一眼就能分辨出谁是姐姐谁是妹妹。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">String</span> alita <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">String</span><span class="token punctuation">(</span><span class="token string">&quot;小萝莉&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.11 并发编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java判断两个字符串是否相等？</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2021年7月13日</span><meta property="datePublished" content="2021-07-13T07:01:13.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><meta property="articleSection" content="Java核心"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag 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4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 6 分钟</span><meta property="timeRequired" content="PT6M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="java判断两个字符串是否相等" tabindex="-1"><a class="header-anchor" href="#java判断两个字符串是否相等" aria-hidden="true">#</a> Java判断两个字符串是否相等？</h1><p>“哥，如何比较两个字符串相等啊？”三妹问。</p><p>“这个问题看似简单，却在 Stack Overflow 上有超过 370 万的访问量。”我说，“这个问题也可以引申为 <code>.equals()</code> 和 ‘==’ 操作符有什么区别。”</p><ul><li>“==”操作符用于比较两个对象的地址是否相等。</li><li><code>.equals()</code> 方法用于比较两个对象的内容是否相等。</li></ul><p>“不是很理解。”三妹感到很困惑。</p><p>“我来举个不恰当又很恰当的例子，一看你就明白了，三妹。”</p><p>有一对双胞胎，姐姐叫阿丽塔，妹妹叫洛丽塔。我们普通人可能完全无法分辨谁是姐姐谁是妹妹，可她们的妈妈却可以轻而易举地辨认出。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/string/equals-01.png" alt=""></p><p><code>.equals()</code> 就好像我们普通人，看见阿丽塔以为是洛丽塔，看见洛丽塔以为是阿丽塔，看起来一样就觉得她们是同一个人；“==”操作符就好像她们的妈妈，要求更严格，观察更细致，一眼就能分辨出谁是姐姐谁是妹妹。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">String</span> alita <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">String</span><span class="token punctuation">(</span><span class="token string">&quot;小萝莉&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 <span class="token class-name">String</span> luolita <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">String</span><span class="token punctuation">(</span><span class="token string">&quot;小萝莉&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 
 <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span>alita<span class="token punctuation">.</span><span class="token function">equals</span><span class="token punctuation">(</span>luolita<span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// true</span>
@@ -125,6 +125,6 @@ a<span class="token punctuation">.</span><span class="token function">equals</sp
     <span class="token keyword">return</span> <span class="token boolean">true</span><span class="token punctuation">;</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>从源码上可以看得出，如果 cs 是 StringBuffer，该方法还会进行同步，非常的智能化；如果是 String 的话，其实调用的还是 <code>equals()</code> 方法。当然了，这也就意味着使用该方法进行比较的时候，多出来了很多步骤，性能上有些损失。</p><p>“是的，总体上感觉还是 <code>Objects.equals()</code> 比较舒服。”三妹的眼睛是雪亮的，发现了这个方法的优点。</p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png"></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/string/equals.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/12 下午4:24:21</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/string/intern.html" class="nav-link prev" aria-label=" String#intern"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!----> String#intern</div></a><a href="/string/join.html" class="nav-link next" aria-label="字符串拼接"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">字符串拼接<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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diff --git a/dist/string/immutable.html b/dist/string/immutable.html
index f6326b41..b86e6dfa 100644
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class="title">2.4 字符串&amp;数组</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a aria-current="page" href="/string/immutable.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="字符串为什么是不可变的"><!---->字符串为什么是不可变的<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/string/constant-pool.html" class="nav-link sidebar-link sidebar-page" aria-label="字符串常量池"><!---->字符串常量池<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/string/intern.html" class="nav-link sidebar-link sidebar-page" aria-label=" String#intern"><!----> String#intern<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/string/equals.html" class="nav-link sidebar-link sidebar-page" aria-label="字符串比较"><!---->字符串比较<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/string/join.html" class="nav-link sidebar-link 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class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->为什么String是不可变的？</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 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class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->为什么String是不可变的？</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2021年10月22日</span><meta property="datePublished" content="2021-10-22T07:22:10.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><meta property="articleSection" content="Java核心"></ul></span><span 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aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 5 分钟</span><meta property="timeRequired" content="PT5M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="为什么string是不可变的" tabindex="-1"><a class="header-anchor" href="#为什么string是不可变的" aria-hidden="true">#</a> 为什么String是不可变的？</h1><p>我正坐在沙发上津津有味地读刘欣大佬的《码农翻身》——Java 帝国这一章，门铃响了。起身打开门一看，是三妹，她从学校回来了。</p><p>“三妹，你回来的真及时，今天我们打算讲 Java 中的字符串呢。”等三妹换鞋的时候我说。</p><p>“哦，可以呀，哥。听说字符串的细节特别多，什么字符串常量池了、字符串不可变性了、字符串拼接了、字符串长度限制了等等，你最好慢慢讲，否则我可能一时半会消化不了。”三妹的态度显得很诚恳。</p><p>“嗯，我已经想好了，今天就只带你大概认识一下字符串，具体的细节咱们后面再慢慢讲，保证你能及时消化。”</p><p>“好，那就开始吧。”三妹已经准备好坐在了电脑桌的边上。</p><p>我应了一声后走到电脑桌前坐下来，顺手打开 Intellij IDEA，并找到了 String 的源码。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">final</span> <span class="token keyword">class</span> <span class="token class-name">String</span>
     <span class="token keyword">implements</span> <span class="token class-name"><span class="token namespace">java<span class="token punctuation">.</span>io<span class="token punctuation">.</span></span>Serializable</span><span class="token punctuation">,</span> <span class="token class-name">Comparable</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">String</span><span class="token punctuation">&gt;</span></span><span class="token punctuation">,</span> <span class="token class-name">CharSequence</span> <span class="token punctuation">{</span>
     <span class="token annotation punctuation">@Stable</span>
     <span class="token keyword">private</span> <span class="token keyword">final</span> <span class="token keyword">byte</span><span class="token punctuation">[</span><span class="token punctuation">]</span> value<span class="token punctuation">;</span>
@@ -101,6 +101,6 @@
     <span class="token keyword">return</span> <span class="token keyword">new</span> <span class="token class-name">String</span><span class="token punctuation">(</span>buf<span class="token punctuation">,</span> UTF16<span class="token punctuation">)</span><span class="token punctuation">;</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p><code>concat()</code> 方法用于拼接字符串，不管编码是否一致，最终也返回的是新的字符串对象。</p><p>“<code>replace()</code> 替换方法其实也一样，三妹，你可以自己一会看一下源码，也是返回新的字符串对象。”</p><p>“这就意味着，不管是截取、拼接，还是替换，都不是在原有的字符串上进行的，而是重新生成了新的字符串对象。也就是说，这些操作执行过后，<strong>原来的字符串对象并没有发生改变</strong>。”</p><p>“三妹，你记住，String 对象一旦被创建后就固定不变了，对 String 对象的任何修改都不会影响到原来的字符串对象，都会生成新的字符串对象。”</p><p>“嗯嗯，记住了，哥。”三妹很乖。</p><p>“那今天就先讲到这吧，后面我们再对每一个细分领域深入地展开一下。你可以找一些资料先预习下，我出去散会心。。。。。”</p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png"></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/string/immutable.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/3/27 下午4:36:50</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span><!--]--><!--]--></div></footer><nav class="page-nav"><!----><a href="/string/constant-pool.html" class="nav-link next" aria-label="字符串常量池"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">字符串常量池<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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diff --git a/dist/string/intern.html b/dist/string/intern.html
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aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 5 分钟</span><meta property="timeRequired" content="PT5M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="深入解析-string-intern" tabindex="-1"><a class="header-anchor" href="#深入解析-string-intern" aria-hidden="true">#</a> 深入解析 String#intern</h1><p>“哥，你发给我的那篇文章我看了，结果直接把我给看得不想学 Java 了！”三妹气冲冲地说。</p><p>“哪一篇啊？”看着三妹面色沉重，我关心地问到。</p><p>“就是美团技术团队深入解析 <code>String.intern()</code> 那篇啊！”三妹回答。</p><blockquote><p>https://tech.meituan.com/2014/03/06/in-depth-understanding-string-intern.html</p></blockquote><p>“哦，我想起来了，不挺好一篇文章嘛，深入浅出，精品中的精品，看完后你应该对 String 的 intern 彻底理解了才对呀。”</p><p>“好是好，但我就是看不懂！”三妹委屈地说，“哥，还是你亲自给我讲讲吧？”</p><p>“好吧，上次学的<a href="https://mp.weixin.qq.com/s/b69zXknKLIa3FWs0Yj23xA" target="_blank" rel="noopener noreferrer">字符串常量池<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>你都搞清楚了吧？”</p><p>“嗯。”三妹微微的点了点头。</p><p>要理解美团技术团队的这篇文章，你只需要记住这几点内容：</p><p>第一，使用双引号声明的字符串对象会保存在字符串常量池中。</p><p>第二，使用 new 关键字创建的字符串对象会先从字符串常量池中找，如果没找到就创建一个，然后再在堆中创建字符串对象；如果找到了，就直接在堆中创建字符串对象。</p><p>第三，针对没有使用双引号声明的字符串对象来说，就像下面代码中的 s1 那样：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">String</span> s1 <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">String</span><span class="token punctuation">(</span><span class="token string">&quot;二哥&quot;</span><span class="token punctuation">)</span> <span class="token operator">+</span> <span class="token keyword">new</span> <span class="token class-name">String</span><span class="token punctuation">(</span><span class="token string">&quot;三妹&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->深入解析 String#intern</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 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40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><meta property="articleSection" content="Java核心"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 5 分钟</span><meta property="timeRequired" content="PT5M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="深入解析-string-intern" tabindex="-1"><a class="header-anchor" href="#深入解析-string-intern" aria-hidden="true">#</a> 深入解析 String#intern</h1><p>“哥，你发给我的那篇文章我看了，结果直接把我给看得不想学 Java 了！”三妹气冲冲地说。</p><p>“哪一篇啊？”看着三妹面色沉重，我关心地问到。</p><p>“就是美团技术团队深入解析 <code>String.intern()</code> 那篇啊！”三妹回答。</p><blockquote><p>https://tech.meituan.com/2014/03/06/in-depth-understanding-string-intern.html</p></blockquote><p>“哦，我想起来了，不挺好一篇文章嘛，深入浅出，精品中的精品，看完后你应该对 String 的 intern 彻底理解了才对呀。”</p><p>“好是好，但我就是看不懂！”三妹委屈地说，“哥，还是你亲自给我讲讲吧？”</p><p>“好吧，上次学的<a href="https://mp.weixin.qq.com/s/b69zXknKLIa3FWs0Yj23xA" target="_blank" rel="noopener noreferrer">字符串常量池<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>你都搞清楚了吧？”</p><p>“嗯。”三妹微微的点了点头。</p><p>要理解美团技术团队的这篇文章，你只需要记住这几点内容：</p><p>第一，使用双引号声明的字符串对象会保存在字符串常量池中。</p><p>第二，使用 new 关键字创建的字符串对象会先从字符串常量池中找，如果没找到就创建一个，然后再在堆中创建字符串对象；如果找到了，就直接在堆中创建字符串对象。</p><p>第三，针对没有使用双引号声明的字符串对象来说，就像下面代码中的 s1 那样：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">String</span> s1 <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">String</span><span class="token punctuation">(</span><span class="token string">&quot;二哥&quot;</span><span class="token punctuation">)</span> <span class="token operator">+</span> <span class="token keyword">new</span> <span class="token class-name">String</span><span class="token punctuation">(</span><span class="token string">&quot;三妹&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>如果想把 s1 的内容也放入字符串常量池的话，可以调用 <code>intern()</code> 方法来完成。</p><p>不过，需要注意的是，Java 7 的时候，字符串常量池从永久代中移动到了堆中，虽然此时永久代还没有完全被移除。Java 8 的时候，永久代被彻底移除。</p><p>这个变化也直接影响了 <code>String.intern()</code> 方法在执行时的策略，Java 7 之前，执行 <code>String.intern()</code> 方法的时候，不管对象在堆中是否已经创建，字符串常量池中仍然会创建一个内容完全相同的新对象； Java 7 之后呢，由于字符串常量池放在了堆中，执行 <code>String.intern()</code> 方法的时候，如果对象在堆中已经创建了，字符串常量池中就不需要再创建新的对象了，而是直接保存堆中对象的引用，也就节省了一部分的内存空间。</p><p>“三妹，来猜猜这段代码输出的结果吧。”我说。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">String</span> s1 <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">String</span><span class="token punctuation">(</span><span class="token string">&quot;二哥三妹&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 <span class="token class-name">String</span> s2 <span class="token operator">=</span> s1<span class="token punctuation">.</span><span class="token function">intern</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span>s1 <span class="token operator">==</span> s2<span class="token punctuation">)</span><span class="token punctuation">;</span>
@@ -52,6 +52,6 @@
 <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span>s1 <span class="token operator">==</span> s2<span class="token punctuation">)</span><span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>“难道也输出 false ？”三妹有点不确定。</p><p>“不，这段代码会输出 true。”我否定了三妹的猜测。</p><p>“为啥呀？”三妹迫切地想要知道答案。</p><p>第一行代码，会在字符串常量池中创建两个对象，一个是“二哥”，一个是“三妹”，然后在堆中会创建两个匿名对象“二哥”和“三妹”（可以暂时忽略），最后还有一个“二哥三妹”的对象，s1 引用的是堆中“二哥三妹”这个对象。</p><p>第二行代码，对 s1 执行 <code>intern()</code> 方法，该方法会从字符串常量池中查找“二哥三妹”这个对象是否存在，此时不存在的，但堆中已经存在了，所以字符串常量池中保存的是堆中这个“二哥三妹”对象的引用，也就是说，s2 和 s1 的引用地址是相同的，所以输出的结果为 true。</p><p>“来看一下运行结果。”我胸有成竹地说。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>true
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>“我再来画幅图，帮助你理解下。”</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/string/intern-02.png" alt=""></p><p>“哇，我明白了！”三妹长舒一口气，大有感慨 intern 也没什么难理解的意味。</p><p>不过需要注意的是，尽管 intern 可以确保所有具有相同内容的字符串共享相同的内存空间，但也不要烂用 intern，因为任何的缓存池都是有大小限制的，不能无缘无故就占用了相对稀缺的缓存空间，导致其他字符串没有坑位可占。</p><p>另外，字符串常量池本质上是一个固定大小的 StringTable，如果放进去的字符串过多，就会造成严重的哈希冲突，从而导致链表变长，链表变长也就意味着字符串常量池的性能会大幅下降，因为要一个一个找是需要花费时间的。</p><p>“好了，三妹，关于 String 的 intern 就讲到这吧，这次理解了吧？”我问。</p><p>“哥，你真棒！”</p><p>看到三妹一点一滴的进步，我也感到由衷的开心。</p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png"></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/string/intern.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/12 下午4:24:21</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/string/constant-pool.html" class="nav-link prev" aria-label="字符串常量池"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->字符串常量池</div></a><a href="/string/equals.html" class="nav-link next" aria-label="字符串比较"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">字符串比较<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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diff --git a/dist/string/join.html b/dist/string/join.html
index 0727de6e..023ac204 100644
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clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java字符串拼接的几种方式</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" 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sidebar-link sidebar-page" aria-label="字符串常量池"><!---->字符串常量池<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/string/intern.html" class="nav-link sidebar-link sidebar-page" aria-label=" String#intern"><!----> String#intern<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/string/equals.html" class="nav-link sidebar-link sidebar-page" aria-label="字符串比较"><!---->字符串比较<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/string/join.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="字符串拼接"><!---->字符串拼接<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/string/split.html" class="nav-link sidebar-link sidebar-page" aria-label="字符串分割"><!---->字符串分割<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/array/array.html" class="nav-link sidebar-link 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class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java字符串拼接的几种方式</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2021年7月13日</span><meta property="datePublished" content="2021-07-13T07:01:13.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><meta property="articleSection" content="Java核心"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag 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4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 8 分钟</span><meta property="timeRequired" content="PT8M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="java字符串拼接的几种方式" tabindex="-1"><a class="header-anchor" href="#java字符串拼接的几种方式" aria-hidden="true">#</a> Java字符串拼接的几种方式</h1><p>“哥，你让我看的《Java 开发手册》上有这么一段内容：循环体内，拼接字符串最好使用 StringBuilder 的 <code>append()</code> 方法，而不是 + 号操作符。这是为什么呀？”三妹疑惑地问。</p><p>“好的，三妹，哥来慢慢给你讲。”我回答。</p><p>三妹能在学习的过程中不断地发现问题，让我感到非常的开心。其实很多时候，我们不应该只是把知识点记在心里，还应该问一问自己，到底是为什么，只有迈出去这一步，才能真正的成长起来。</p><p>“+ 号操作符其实被 Java 在编译的时候重新解释了，换一种说法就是，+ 号操作符是一种语法糖，让字符串的拼接变得更简便了。”一边给三妹解释，我一边在 Intellij IDEA 中敲出了下面这段代码。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">class</span> <span class="token class-name">Demo</span> <span class="token punctuation">{</span>
     <span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">void</span> <span class="token function">main</span><span class="token punctuation">(</span><span class="token class-name">String</span><span class="token punctuation">[</span><span class="token punctuation">]</span> args<span class="token punctuation">)</span> <span class="token punctuation">{</span>
         <span class="token class-name">String</span> chenmo <span class="token operator">=</span> <span class="token string">&quot;沉默&quot;</span><span class="token punctuation">;</span>
         <span class="token class-name">String</span> wanger <span class="token operator">=</span> <span class="token string">&quot;王二&quot;</span><span class="token punctuation">;</span>
@@ -229,6 +229,6 @@ public class com.itwanger.thirtyseven.Demo {
     <span class="token keyword">return</span> buf<span class="token punctuation">.</span><span class="token function">toString</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>内部使用的仍然是 StringBuilder。</p><p>“好了，三妹，关于字符串拼接的知识点我们就讲到这吧。注意 Java 9 以后，对 + 号操作符的解释和之前发生了变化，字节码指令已经不同了，等后面你学了字节码指令后我们再详细地讲一次。”我说。</p><p>“嗯，哥，你休息吧，我把这些例子再重新跑一遍。”三妹说。</p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png"></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/string/join.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/3/27 下午4:36:50</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/string/equals.html" class="nav-link prev" aria-label="字符串比较"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->字符串比较</div></a><a href="/string/split.html" class="nav-link next" aria-label="字符串分割"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">字符串分割<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.11 并发编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading 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data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 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class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->如何在Java中优雅地分割String字符串？</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 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0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2021年7月13日</span><meta property="datePublished" content="2021-07-13T07:01:13.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><meta property="articleSection" content="Java核心"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag 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4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 6 分钟</span><meta property="timeRequired" content="PT6M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="如何在java中优雅地分割string字符串" tabindex="-1"><a class="header-anchor" href="#如何在java中优雅地分割string字符串" aria-hidden="true">#</a> 如何在Java中优雅地分割String字符串？</h1><p>“哥，我感觉字符串拆分没什么可讲的呀，直接上 String 类的 <code>split()</code> 方法不就可以了！”三妹毫不客气地说。</p><p>“假如你真的这么觉得，那可要注意了，事情远没这么简单。”我微笑着说。</p><p>假如现在有这样一串字符序列“沉默王二，一枚有趣的程序员”，需要按照中文逗号“，”进行拆分，这意味着第一串字符序列为逗号前面的“沉默王二”，第二串字符序列为逗号后面的“一枚有趣的程序员”。</p><p>“这不等于没说吗？哥！”还没等我说，三妹就打断了我。</p><p>“别着急嘛，等哥说完。”我依然保持着微笑继续说，“在拆分之前，要先进行检查，判断一下这串字符是否包含逗号，否则应该抛出异常。”</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">Test</span> <span class="token punctuation">{</span>
     <span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">void</span> <span class="token function">main</span><span class="token punctuation">(</span><span class="token class-name">String</span><span class="token punctuation">[</span><span class="token punctuation">]</span> args<span class="token punctuation">)</span> <span class="token punctuation">{</span>
         <span class="token class-name">String</span> cmower <span class="token operator">=</span> <span class="token string">&quot;沉默王二，一枚有趣的程序员&quot;</span><span class="token punctuation">;</span>
         <span class="token keyword">if</span> <span class="token punctuation">(</span>cmower<span class="token punctuation">.</span><span class="token function">contains</span><span class="token punctuation">(</span><span class="token string">&quot;，&quot;</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
@@ -108,6 +108,6 @@
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>进入 debug 模式的话，可以看到以下内容：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/string/split-03.png" alt=""></p><p>也就是说，传递 2 个参数的时候，会直接调用 <code>substring()</code> 进行截取，第二个分隔符后的就不再拆分了。</p><p>来看一下程序输出的结果：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>第一部分：沉默王二 第二部分：一枚有趣的程序员，宠爱他
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>“没想到啊，这个字符串拆分还挺讲究的呀！”三妹感慨地说。</p><p>“是的，其实字符串拆分在实际的工作当中还是挺经常用的。前端经常会按照规则传递一长串字符序列到后端，后端就需要按照规则把字符串拆分再做处理。”我说。</p><p>“嗯，我把今天的内容温习下，二哥，你休息会。”三妹说。</p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png"></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/string/split.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/12 下午4:24:21</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/string/join.html" class="nav-link prev" aria-label="字符串拼接"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->字符串拼接</div></a><a href="/array/array.html" class="nav-link next" aria-label="数组"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">数组<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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index 4b4f7518..c0f4bdb8 100644
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aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年6月8日</span><meta property="datePublished" content="2022-06-08T06:51:04.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category3" role>知识库搭建</li><meta property="articleSection" content="知识库搭建"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag3" role>知识库搭建</li></ul><meta property="keywords" content="知识库搭建"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 1 分钟</span><meta property="timeRequired" content="PT1M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><p>马上 618/1111 了，各大云服务器厂家应该已经准备好活动方案了，不管如何，新用户应该是最香的，反正不管什么时候，我们都只负责白飘——备份迁移，绝不续费！</p><p>谁让这些云服务器厂家在续费上贵的一笔呢？需要云服务器的小伙伴可以直接扫码进群（需要确保是新用户，之前没购买过阿里云产品的，购过买的切记用亲朋好友的账号顶上），反正白嫖就是香。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/buy-cloud-server-0fcf3a8e-2fdc-403a-96d7-bc6c75ae5d8a.png" alt=""></p><p>总之一句话，“<strong>老客不如狗，新客是真香</strong>”~</p><p>有些买过服务器的小伙伴，已经把个人博客整起来了，这里推荐三个给大家欣赏一下（可以直接复制图片下的链接到浏览器地址栏），真的惊艳~</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-7379f1e6-6967-447e-9f62-e19ba1af927d.png" alt="http://zhuoke.xyz/"></p><p><strong>打开这个网站的时候要小心，小心差点鼻血流出来</strong>~~~~</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-182e856b-771c-4445-b508-dbabded164f2.png" alt="https://laifeng.xyz/about_me/"></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-67d47432-e571-48ad-8c12-4638264d82bf.png" alt="https://www.zm211314.top/"></p><p>不得不说，都是二哥的铁粉，个人博客还不忘夸二哥一番。</p><p>😜</p><p>之前买阿里云服务器的时候，很多小伙伴就强烈要求二哥出一些教程把饭喂到嘴里，因为是第一次——玩服务器~</p><p>我出过一期视频，讲了程序员拥有一台云服务器能做哪些很酷的事情？</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/buy-cloud-server-ae3255d4-1166-440c-b1a4-defb298f8b0c.png" alt=""></p><blockquote><p>视频地址戳这里：<a href="https://www.bilibili.com/video/BV1nb4y187rU/" target="_blank" rel="noopener noreferrer">https://www.bilibili.com/video/BV1nb4y187rU/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" 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277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年6月8日</span><meta property="datePublished" content="2022-06-08T06:51:04.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 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0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 1 分钟</span><meta property="timeRequired" content="PT1M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><p>马上 618/1111 了，各大云服务器厂家应该已经准备好活动方案了，不管如何，新用户应该是最香的，反正不管什么时候，我们都只负责白飘——备份迁移，绝不续费！</p><p>谁让这些云服务器厂家在续费上贵的一笔呢？需要云服务器的小伙伴可以直接扫码进群（需要确保是新用户，之前没购买过阿里云产品的，购过买的切记用亲朋好友的账号顶上），反正白嫖就是香。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/buy-cloud-server-0fcf3a8e-2fdc-403a-96d7-bc6c75ae5d8a.png" alt=""></p><p>总之一句话，“<strong>老客不如狗，新客是真香</strong>”~</p><p>有些买过服务器的小伙伴，已经把个人博客整起来了，这里推荐三个给大家欣赏一下（可以直接复制图片下的链接到浏览器地址栏），真的惊艳~</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-7379f1e6-6967-447e-9f62-e19ba1af927d.png" alt="http://zhuoke.xyz/"></p><p><strong>打开这个网站的时候要小心，小心差点鼻血流出来</strong>~~~~</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-182e856b-771c-4445-b508-dbabded164f2.png" alt="https://laifeng.xyz/about_me/"></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-67d47432-e571-48ad-8c12-4638264d82bf.png" alt="https://www.zm211314.top/"></p><p>不得不说，都是二哥的铁粉，个人博客还不忘夸二哥一番。</p><p>😜</p><p>之前买阿里云服务器的时候，很多小伙伴就强烈要求二哥出一些教程把饭喂到嘴里，因为是第一次——玩服务器~</p><p>我出过一期视频，讲了程序员拥有一台云服务器能做哪些很酷的事情？</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/buy-cloud-server-ae3255d4-1166-440c-b1a4-defb298f8b0c.png" alt=""></p><blockquote><p>视频地址戳这里：<a href="https://www.bilibili.com/video/BV1nb4y187rU/" target="_blank" rel="noopener noreferrer">https://www.bilibili.com/video/BV1nb4y187rU/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in 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active sidebar-link sidebar-page active" aria-label="购买域名&amp;域名解析"><!---->购买域名&amp;域名解析<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/szjy/record-domain.html" class="nav-link sidebar-link sidebar-page" aria-label="购买域名&amp;域名解析"><!---->购买域名&amp;域名解析<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/szjy/https-domain.html" class="nav-link sidebar-link sidebar-page" aria-label="给域名配置HTTPS证书"><!---->给域名配置HTTPS证书<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->购买域名&amp;域名解析</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年6月8日</span><meta property="datePublished" content="2022-06-08T06:51:04.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category3" role>知识库搭建</li><meta property="articleSection" content="知识库搭建"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag3" role>知识库搭建</li></ul><meta property="keywords" content="知识库搭建"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 2 分钟</span><meta property="timeRequired" content="PT2M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><p>购买域名可以通过多个服务商，比如说阿里云、百度云、腾讯云。</p><p>我这里以阿里云为例，购入一个 <a href="https://tobebetterjavaer.com/" target="_blank" rel="noopener noreferrer">tobebetterjavaer.com<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a> 的域名（寓意 Java 程序员进阶之路）。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-yuming-jiexi-02.png" alt=""></p><p>在此之前呢，我已经购买了一台阿里云的服务器，2核4G内存的轻量级云服务器。就是<a href="https://tobebetterjavaer.com/szjy/buy-cloud-server.html" target="_blank" rel="noopener noreferrer">上次带大家白票的那波<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，我自己也购入了一台。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-yuming-jiexi-03.png" alt=""></p><p>这台服务器上目前已经安装了<a href="https://tobebetterjavaer.com/szjy/install-baota-mianban.html" target="_blank" rel="noopener noreferrer">宝塔面板<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>、<a href="https://tobebetterjavaer.com/nginx/nginx.html" target="_blank" rel="noopener noreferrer">Nginx<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，并且可以通过 IP 地址成功访问 80 端口。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-yuming-jiexi-04.png" alt=""></p><p>我想做什么呢？</p><p><strong>我希望可以通过域名直接访问而不是 IP</strong>！</p><p>直接在浏览器地址栏里输入域名访问肯定是不行的。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-yuming-jiexi-05.png" alt=""></p><p>那该怎么办呢？</p><p>进行<strong>域名解析</strong>。当我们购买了一台云服务器后，系统会默认给这台服务器分配一个已经绑定的 IP 地址。但由于 IP 地址是由数组组成的，不方便记忆，所以就使用域名来代替。</p><p>那<strong>域名解析</strong>就是把域名指向网站的 IP 地址，让用户通过域名就可以访问到网站的一种服务。</p><p>阿里云是通过云解析 DNS 提供域名解析服务的。DNS，全称 Domain Name System，也就是域名系统，是一个将域名和IP地址相互映射的分布式数据库，以便用户访问互联网。</p><p>云解析 DNS 支持 A、AAAA 、CNAME 等记录类型。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-yuming-jiexi-06.png" alt=""></p><p>进入域名控制台，选择要解析的域名，点击「解析」会跳转到解析设置页面。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-yuming-jiexi-07.png" alt=""></p><p>直接点击「新手指导」按钮，填写服务器的 IP 地址。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-yuming-jiexi-08.png" alt=""></p><p>该方法可以同时添加 www 和 @ 记录，成功后，可以通过带 www 和不带 www 的方式访问网站。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-yuming-jiexi-09.png" alt=""></p><ul><li>主机记录 @ 表示可以直接通过不带 www 的域名访问，也就是 <a href="https://tobebetterjavaer.com/" target="_blank" rel="noopener noreferrer">tobebetterjavaer.com<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>；</li><li>主机记录 www 表示可以带 www 的域名访问，也就是 <a href="https://tobebetterjavaer.com/" target="_blank" rel="noopener noreferrer">www.tobebetterjavaer.com<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul><p>TTL 为缓存时间，数值越小，表示修改记录生效的时间越快，默认为10分钟。</p><p>记得对域名进行实名认证，认证通过后（否则域名会处于锁定状态 serverhold），再次刷新页面，就可以访问成功了！</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-yuming-jiexi-10.png" alt=""></p><p>nice！</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/szjy/buy-domain.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 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277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年6月8日</span><meta property="datePublished" content="2022-06-08T06:51:04.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 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viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag3" role>知识库搭建</li></ul><meta property="keywords" content="知识库搭建"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 2 分钟</span><meta property="timeRequired" content="PT2M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><p>购买域名可以通过多个服务商，比如说阿里云、百度云、腾讯云。</p><p>我这里以阿里云为例，购入一个 <a href="https://tobebetterjavaer.com/" target="_blank" rel="noopener noreferrer">tobebetterjavaer.com<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a> 的域名（寓意 Java 程序员进阶之路）。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-yuming-jiexi-02.png" alt=""></p><p>在此之前呢，我已经购买了一台阿里云的服务器，2核4G内存的轻量级云服务器。就是<a href="https://tobebetterjavaer.com/szjy/buy-cloud-server.html" target="_blank" rel="noopener noreferrer">上次带大家白票的那波<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，我自己也购入了一台。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-yuming-jiexi-03.png" alt=""></p><p>这台服务器上目前已经安装了<a href="https://tobebetterjavaer.com/szjy/install-baota-mianban.html" target="_blank" rel="noopener noreferrer">宝塔面板<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>、<a href="https://tobebetterjavaer.com/nginx/nginx.html" target="_blank" rel="noopener noreferrer">Nginx<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，并且可以通过 IP 地址成功访问 80 端口。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-yuming-jiexi-04.png" alt=""></p><p>我想做什么呢？</p><p><strong>我希望可以通过域名直接访问而不是 IP</strong>！</p><p>直接在浏览器地址栏里输入域名访问肯定是不行的。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-yuming-jiexi-05.png" alt=""></p><p>那该怎么办呢？</p><p>进行<strong>域名解析</strong>。当我们购买了一台云服务器后，系统会默认给这台服务器分配一个已经绑定的 IP 地址。但由于 IP 地址是由数组组成的，不方便记忆，所以就使用域名来代替。</p><p>那<strong>域名解析</strong>就是把域名指向网站的 IP 地址，让用户通过域名就可以访问到网站的一种服务。</p><p>阿里云是通过云解析 DNS 提供域名解析服务的。DNS，全称 Domain Name System，也就是域名系统，是一个将域名和IP地址相互映射的分布式数据库，以便用户访问互联网。</p><p>云解析 DNS 支持 A、AAAA 、CNAME 等记录类型。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-yuming-jiexi-06.png" alt=""></p><p>进入域名控制台，选择要解析的域名，点击「解析」会跳转到解析设置页面。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-yuming-jiexi-07.png" alt=""></p><p>直接点击「新手指导」按钮，填写服务器的 IP 地址。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-yuming-jiexi-08.png" alt=""></p><p>该方法可以同时添加 www 和 @ 记录，成功后，可以通过带 www 和不带 www 的方式访问网站。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-yuming-jiexi-09.png" alt=""></p><ul><li>主机记录 @ 表示可以直接通过不带 www 的域名访问，也就是 <a href="https://tobebetterjavaer.com/" target="_blank" rel="noopener noreferrer">tobebetterjavaer.com<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>；</li><li>主机记录 www 表示可以带 www 的域名访问，也就是 <a href="https://tobebetterjavaer.com/" target="_blank" rel="noopener noreferrer">www.tobebetterjavaer.com<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul><p>TTL 为缓存时间，数值越小，表示修改记录生效的时间越快，默认为10分钟。</p><p>记得对域名进行实名认证，认证通过后（否则域名会处于锁定状态 serverhold），再次刷新页面，就可以访问成功了！</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-yuming-jiexi-10.png" alt=""></p><p>nice！</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/szjy/buy-domain.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 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aria-label="一、前言"><!---->一、前言<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">二、Java核心</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span 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aria-label="购买域名&amp;域名解析"><!---->购买域名&amp;域名解析<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/szjy/record-domain.html" class="nav-link sidebar-link sidebar-page" aria-label="购买域名&amp;域名解析"><!---->购买域名&amp;域名解析<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/szjy/https-domain.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="给域名配置HTTPS证书"><!---->给域名配置HTTPS证书<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->给域名配置HTTPS证书</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年6月8日</span><meta property="datePublished" content="2022-06-08T06:51:04.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category3" role>知识库搭建</li><meta property="articleSection" content="知识库搭建"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag3" role>知识库搭建</li></ul><meta property="keywords" content="知识库搭建"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 4 分钟</span><meta property="timeRequired" content="PT4M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><p>上一次，我们完成<a href="https://tobebetterjavaer.com/szjy/buy-domain.html" target="_blank" rel="noopener noreferrer">域名解析<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>后，发现浏览器地址栏里的域名被提示为不安全，就是因为它还是个宝宝，没有从 HTTP 升级为 HTTPS。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-https-01.png" alt=""></p><p>那怎么升级为 HTTPS 证书呢？可以直接通过阿里云购买 SSL 证书，但特么巨贵！</p><p>本来想尝试一下 AWS 的免费 SSL 证书，但卡到验证码这一步就是收不到信息。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-https-02.png" alt=""></p><p>索性就还用 FreeSSL 吧。</p><p>FreeSSL.cn 是一个提供免费HTTPS证书申请的网站，网址如下：</p><blockquote><p><a href="https://freessl.cn" target="_blank" rel="noopener noreferrer">https://freessl.cn<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>输入域名 tobebetterjavaer.com 选择 trustAsia 品牌证书，点击「创建」，这次我选择的是三年期自动化（刚好我的服务器申请的是三年，域名也是三年），9.9 元，还是非常良心的。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-https-03.png" alt=""></p><p>微信/支付宝支付完成后会跳到证书的订单列表。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-https-04.png" alt=""></p><p>选择「更多操作」里的订单详情，会跳转到 CertCloud 页的管理订单。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-https-05.png" alt=""></p><p>点击「提交 CSR」后点击「提交」。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-https-06.png" alt=""></p><p>接下来就到了域名验证环节，点击「获取验证信息」。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-https-07.png" alt=""></p><p>切换到域名解析设置页，准备添加记录。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-https-08.png" alt=""></p><p>按照 CertCloud 提供的域名验证信息，添加记录。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-https-09.png" alt=""></p><p>添加完成后切换到 CertCloud，点击「域名验证」。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-https-10.png" alt=""></p><p>如果不确定上一步的记录是否添加成功，可以点击「诊断」按钮进行测试，如果没有问题会提示匹配成功的信息。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-https-11.png" alt=""></p><p>之后，点击「我已完成配置，检测一下」，如果没有问题，会先提示等待 CA 颁发证书，之后再次检测会提示「证书已签发，请刷新页面查看」。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-https-12.png" alt=""></p><p>好的，直接刷新页面，可以看到订单状态已经变成「已签发」的状态。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-https-13.png" alt=""></p><p>点击证书操作中的「下载证书」，选择适用于 Nginx 的 PEM 格式证书，点击下载。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-https-14.png" alt=""></p><p>使用 <a href="https://tobebetterjavaer.com/gongju/tabby.html" target="_blank" rel="noopener noreferrer">Tabby 终端<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>的「SFTP」将证书上传到网站的云服务器。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-https-15.png" alt=""></p><p>打开<a href="https://tobebetterjavaer.com/szjy/install-baota-mianban.html" target="_blank" rel="noopener noreferrer">宝塔面板<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，准备配置 Nginx 的 SSL 证书。将以下信息复制到 Nginx 的配置文件中，保存后重新加载配置。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code># HTTPS server
+    <div id="app"><!--[--><!--[--><!--[--><span tabindex="-1"></span><a href="#main-content" class="skip-link sr-only">Skip to content</a><!--]--><div class="theme-container has-toc"><!--[--><!--[--><header class="navbar"><div class="navbar-left"><button class="toggle-sidebar-button" title="Toggle Sidebar"><span class="icon"></span></button><!----><a href="/" class="brand"><img class="logo" src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/logo-02.png" alt="Java 程序员进阶之路"><!----><span class="site-name hide-in-pad">Java 程序员进阶之路</span></a><!----></div><div class="navbar-center"><!----><nav class="nav-links"><div class="nav-item hide-in-mobile"><a href="/home.html" class="nav-link" aria-label="进阶之路"><span class="icon iconfont icon-lujing" style=""></span>进阶之路<!----></a></div><div class="nav-item hide-in-mobile"><a href="/zhishixingqiu/java-mianshi-zhinan.html" class="nav-link" aria-label="星球专栏"><span class="icon iconfont icon-Artboard" style=""></span>星球专栏<!----></a></div><div 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active"><!----><span class="title">八、知识库搭建</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/szjy/buy-cloud-server.html" class="nav-link sidebar-link sidebar-page" aria-label="购买云服务器"><!---->购买云服务器<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/szjy/install-baota-mianban.html" class="nav-link sidebar-link sidebar-page" aria-label="安装宝塔面板"><!---->安装宝塔面板<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/szjy/buy-domain.html" class="nav-link sidebar-link sidebar-page" aria-label="购买域名&amp;域名解析"><!---->购买域名&amp;域名解析<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/szjy/record-domain.html" class="nav-link sidebar-link sidebar-page" aria-label="备案域名"><!---->备案域名<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/szjy/https-domain.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="给域名配置HTTPS证书"><!---->给域名配置HTTPS证书<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->给域名配置HTTPS证书</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年6月8日</span><meta property="datePublished" content="2022-06-08T06:51:04.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category3" role>知识库搭建</li><meta property="articleSection" content="知识库搭建"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag3" role>知识库搭建</li></ul><meta property="keywords" content="知识库搭建"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 4 分钟</span><meta property="timeRequired" content="PT4M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><p>上一次，我们完成<a href="https://tobebetterjavaer.com/szjy/buy-domain.html" target="_blank" rel="noopener noreferrer">域名解析<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>后，发现浏览器地址栏里的域名被提示为不安全，就是因为它还是个宝宝，没有从 HTTP 升级为 HTTPS。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-https-01.png" alt=""></p><p>那怎么升级为 HTTPS 证书呢？可以直接通过阿里云购买 SSL 证书，但特么巨贵！</p><p>本来想尝试一下 AWS 的免费 SSL 证书，但卡到验证码这一步就是收不到信息。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-https-02.png" alt=""></p><p>索性就还用 FreeSSL 吧。</p><p>FreeSSL.cn 是一个提供免费HTTPS证书申请的网站，网址如下：</p><blockquote><p><a href="https://freessl.cn" target="_blank" rel="noopener noreferrer">https://freessl.cn<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>输入域名 tobebetterjavaer.com 选择 trustAsia 品牌证书，点击「创建」，这次我选择的是三年期自动化（刚好我的服务器申请的是三年，域名也是三年），9.9 元，还是非常良心的。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-https-03.png" alt=""></p><p>微信/支付宝支付完成后会跳到证书的订单列表。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-https-04.png" alt=""></p><p>选择「更多操作」里的订单详情，会跳转到 CertCloud 页的管理订单。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-https-05.png" alt=""></p><p>点击「提交 CSR」后点击「提交」。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-https-06.png" alt=""></p><p>接下来就到了域名验证环节，点击「获取验证信息」。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-https-07.png" alt=""></p><p>切换到域名解析设置页，准备添加记录。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-https-08.png" alt=""></p><p>按照 CertCloud 提供的域名验证信息，添加记录。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-https-09.png" alt=""></p><p>添加完成后切换到 CertCloud，点击「域名验证」。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-https-10.png" alt=""></p><p>如果不确定上一步的记录是否添加成功，可以点击「诊断」按钮进行测试，如果没有问题会提示匹配成功的信息。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-https-11.png" alt=""></p><p>之后，点击「我已完成配置，检测一下」，如果没有问题，会先提示等待 CA 颁发证书，之后再次检测会提示「证书已签发，请刷新页面查看」。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-https-12.png" alt=""></p><p>好的，直接刷新页面，可以看到订单状态已经变成「已签发」的状态。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-https-13.png" alt=""></p><p>点击证书操作中的「下载证书」，选择适用于 Nginx 的 PEM 格式证书，点击下载。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-https-14.png" alt=""></p><p>使用 <a href="https://tobebetterjavaer.com/gongju/tabby.html" target="_blank" rel="noopener noreferrer">Tabby 终端<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>的「SFTP」将证书上传到网站的云服务器。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-https-15.png" alt=""></p><p>打开<a href="https://tobebetterjavaer.com/szjy/install-baota-mianban.html" target="_blank" rel="noopener noreferrer">宝塔面板<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，准备配置 Nginx 的 SSL 证书。将以下信息复制到 Nginx 的配置文件中，保存后重新加载配置。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code># HTTPS server
 
 server {
     listen       443 ssl;
@@ -67,7 +67,7 @@ server {
     server_name  tobebetterjavaer.com www.tobebetterjavaer.com;
     return 301 https://$server_name$request_uri;
 }
-</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>注释掉原来的 80 端口监听，改为 return 跳转。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-https-19.png" alt=""></p><p>再次刷新原来的 HTTP 访问链接，可以看到已经跳转到 HTTPS 了，如果你查看地址栏的话，也会看到地址变成了 [https://tobebetterjavaer.com](https://tobebetterjavaer.com。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-https-20.png" alt=""></p><p>希望这个小破站能自力更生地活下去。目前已有的花费有：</p><ul><li>阿里云服务器：3 年 204 元</li><li>域名：3 年 273 元</li><li>SSL 证书：3 年 9.9 元</li></ul><p>希望能给学习 Java 的小伙伴提供一点点帮助，二哥就感觉值了！</p><p>到此为止，《Java 程序员进阶之路》网站的硬件设施就全部完善了，她已经是个成熟的宝宝了。</p><p>希望百度和谷歌等搜索引擎尽快收录，后面也会去学习一些 SEO 方面的知识，提高一下网站的排名，让网站获得更多的流量，从而提升品牌的影响力。</p><p>恭喜！</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/szjy/https-domain.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/6/8 下午2:51:04</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/szjy/record-domain.html" class="nav-link prev" aria-label="购买域名&amp;域名解析"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->购买域名&amp;域名解析</div></a><!----></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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+</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>注释掉原来的 80 端口监听，改为 return 跳转。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-https-19.png" alt=""></p><p>再次刷新原来的 HTTP 访问链接，可以看到已经跳转到 HTTPS 了，如果你查看地址栏的话，也会看到地址变成了 [https://tobebetterjavaer.com](https://tobebetterjavaer.com。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-https-20.png" alt=""></p><p>希望这个小破站能自力更生地活下去。目前已有的花费有：</p><ul><li>阿里云服务器：3 年 204 元</li><li>域名：3 年 273 元</li><li>SSL 证书：3 年 9.9 元</li></ul><p>希望能给学习 Java 的小伙伴提供一点点帮助，二哥就感觉值了！</p><p>到此为止，《Java 程序员进阶之路》网站的硬件设施就全部完善了，她已经是个成熟的宝宝了。</p><p>希望百度和谷歌等搜索引擎尽快收录，后面也会去学习一些 SEO 方面的知识，提高一下网站的排名，让网站获得更多的流量，从而提升品牌的影响力。</p><p>恭喜！</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/szjy/https-domain.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/6/8 下午2:51:04</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span><!--]--><!--]--></div></footer><nav class="page-nav"><a href="/szjy/record-domain.html" class="nav-link prev" aria-label="备案域名"><div class="hint"><span class="arrow left"></span>上一页</div><div class="link"><!---->备案域名</div></a><!----></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年6月8日</span><meta property="datePublished" content="2022-06-08T06:51:04.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon 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property="keywords" content="知识库搭建"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 4 分钟</span><meta property="timeRequired" content="PT4M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><p>今天来给大家推荐一款玩转云服务器的神器——<strong>宝塔面板</strong>，有了这玩意，服务器能玩一整年，甚至余生！</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-ad40a5f7-30a8-4c6c-9671-c389432e16de.png" alt="https://www.bt.cn/"></p><p>--------开始保姆级演示如何安装宝塔面板-------</p><p>为了给大家呈现出保姆级的教程，我自己新下单了一款轻量应用服务器。登录阿里云服务器后台，可以看到这台服务器正在运行当中。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-11df60df-a51c-48d4-a704-343d01d44777.png" alt=""></p><p>点击「远程链接」的小图标，第一次需要手机验证码，之后进入到在线版的终端窗口。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-1fc16ac7-10b1-4e61-98f5-d48bb09ab626.png" alt=""></p><p>可以按照提示输入 <code>sudo su root</code> 命令切换到 root 账户。</p><p>切换到宝塔Linux 面板页，可以看到对应的安装命令，如下图所示：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-ce7e94b5-c90b-422e-a7e3-942c615c2837.png" alt=""></p><p>我的云服务器镜像选择的是 CentOS，所以可以直接复制 yum 命令</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>yum install -y wget &amp;&amp; wget -O install.sh http://download.bt.cn/install/install_6.0.sh &amp;&amp; sh install.sh
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active"><!----><span class="title">八、知识库搭建</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/szjy/buy-cloud-server.html" class="nav-link sidebar-link sidebar-page" aria-label="购买云服务器"><!---->购买云服务器<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/szjy/install-baota-mianban.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="安装宝塔面板"><!---->安装宝塔面板<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/szjy/buy-domain.html" class="nav-link sidebar-link sidebar-page" aria-label="购买域名&amp;域名解析"><!---->购买域名&amp;域名解析<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/szjy/record-domain.html" class="nav-link sidebar-link sidebar-page" aria-label="备案域名"><!---->备案域名<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/szjy/https-domain.html" class="nav-link sidebar-link sidebar-page" aria-label="给域名配置HTTPS证书"><!---->给域名配置HTTPS证书<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->安装宝塔面板</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 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277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年6月8日</span><meta property="datePublished" content="2022-06-08T06:51:04.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category3" role>知识库搭建</li><meta property="articleSection" content="知识库搭建"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag3" role>知识库搭建</li></ul><meta property="keywords" content="知识库搭建"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 4 分钟</span><meta property="timeRequired" content="PT4M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><p>今天来给大家推荐一款玩转云服务器的神器——<strong>宝塔面板</strong>，有了这玩意，服务器能玩一整年，甚至余生！</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-ad40a5f7-30a8-4c6c-9671-c389432e16de.png" alt="https://www.bt.cn/"></p><p>--------开始保姆级演示如何安装宝塔面板-------</p><p>为了给大家呈现出保姆级的教程，我自己新下单了一款轻量应用服务器。登录阿里云服务器后台，可以看到这台服务器正在运行当中。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-11df60df-a51c-48d4-a704-343d01d44777.png" alt=""></p><p>点击「远程链接」的小图标，第一次需要手机验证码，之后进入到在线版的终端窗口。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-1fc16ac7-10b1-4e61-98f5-d48bb09ab626.png" alt=""></p><p>可以按照提示输入 <code>sudo su root</code> 命令切换到 root 账户。</p><p>切换到宝塔Linux 面板页，可以看到对应的安装命令，如下图所示：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-ce7e94b5-c90b-422e-a7e3-942c615c2837.png" alt=""></p><p>我的云服务器镜像选择的是 CentOS，所以可以直接复制 yum 命令</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>yum install -y wget &amp;&amp; wget -O install.sh http://download.bt.cn/install/install_6.0.sh &amp;&amp; sh install.sh
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>到云服务器的「终端」下进行在线安装。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-b7dcf834-294a-4bd0-86f0-7b0b92c5b3fe.png" alt=""></p><p>yum 命令是 CentOS 的优势，可以在线安装和升级软件。当出现上图提示的内容（外网面板地址、用户名和密码）后就表示宝塔面板安装成功了！</p><p>前后大概 2 分钟左右的时间，还是比较快的。记住外网面板地址、用户名和密码，就可以通过宝塔面板访问云服务器了。</p><p>如果无法访问，表示服务器没有开放 8888 端口。选择我的轻量服务器，选择防火墙，选择「添加规则」。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-65f67086-cc35-4b7f-89b4-d73e51a859e0.png" alt=""></p><p>能看到目前服务器只开放了 HTTP、HTTPS 和 SSH 的端口，8888 端口还没有放行。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-5f7fa1a0-1810-40a0-b371-ae2ee5948f80.png" alt=""></p><p>再次访问外网面板地址，就可以看到登录页面了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-1233ea14-2e6b-48d9-b278-ab87b3cc3cbd.png" alt=""></p><p>登录成功后（让浏览器帮你记住账号和密码），如果之前有宝塔官方账号，可以选择绑定，如果没有的话，注册一个。之后就可以看到宝塔面板推荐我们安装的服务器软件了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-e618418b-1862-4db2-9d61-61358330b77d.png" alt=""></p><p>通常来说，直接安装 LNMP 组合包就可以了，包括可以一键安装到 Linux 环境的 Nginx、MySQL、PHP 等成员。</p><p>LNMP 一键安装包能为不会 Linux 的新手提供一个可以使用 Linux 生产的基础环境，无需一个一个的输入命令，无需值守，无需为软件之间的依赖而烦恼。</p><blockquote><p><a href="https://lnmp.org" target="_blank" rel="noopener noreferrer">https://lnmp.org<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>LAMP 和 LNMP 的差别就在于前者提供的是 Apache 的 Web 服务器，后来是 Nginx。Nginx 由 Igor Sysoev 为俄罗斯访问量第二的 Rambler.ru 站点开发的 Web服务器软件，国内外的门户网站、行业网站也都在使用Nginx，相当的稳定。</p><p>MySQL 基本上是中小型服务器必备的关系型数据库软件；PHP 虽然没落了，但仍然是很多服务器软件的前置环境，比如说最受欢迎的服务器建站工具 WordPress。</p><p>点击「一键安装」，宝塔面板就会帮我们自动安排上了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-036631d0-5160-4b9e-a750-0f15966e1ee3.png" alt=""></p><p>到此为止，宝塔面板的基础环境就准备完成了。可以在上面按照左侧的菜单项目对服务器进行操作了，比如说：</p><ul><li>网站</li><li>FTP</li><li>数据库</li><li>监控</li><li>安全</li><li>防火墙</li><li>文件</li><li>终端</li><li>计划任务</li><li>软件商店</li><li>等等</li></ul><p>这里先说一下终端，第一次进来的时候需要进行 SSH 账号验证。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-08cec2c4-0c4d-4b06-aefb-be29ef1052e6.png" alt=""></p><p>密码从哪里来的呢？</p><p>在「服务器运维」中选择「远程链接」页面下。有 3 种方式，第一种可以直接使用浏览器，第二种使用密钥，第三种使用账户和密码。</p><p>为了方便演示，这里选择选择「设置密码」。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-0560b7fc-4c22-4dd3-be91-d35b631b93e2.png" alt=""></p><p>设置完成后，重启服务器生效。之后在宝塔面板的「终端」面板下填写密码就可以链接了。不过在浏览器的终端里敲命令总感觉有点不太方便，我们最好选择 iterm2、putty、xshell 这样的客户端。</p><p>再说一下软件商店，有付费的有免费的，不过对于我们个人服务器来说，免费版的都足够用了。需要什么安装什么就好了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-6f4f2ed4-74cf-4cc2-af6c-1750f14d3846.png" alt=""></p><p>上传下载文件也非常方便。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-aefbcc8e-28c3-48ff-bf66-efdcb8fd57ae.png" alt=""></p><p>---再再割一下------</p><p>讲真，有了宝塔面板后，操作服务器是真特么的方便啊！装了以后可以：</p><ul><li>创建管理网站</li><li>带颜色的终端命令行</li><li>数据库可视化管理</li><li>文件可视化管理</li><li>服务器软件可视化管理</li><li>一键安装 Nginx 反向代理软件</li><li>申请部署网站 SSL 证书</li><li>代理云服务器端口</li><li>更多强大功能，等待大家去解锁</li></ul><p><img 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class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年6月8日</span><meta property="datePublished" content="2022-06-08T06:51:04.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category3" role>知识库搭建</li><meta property="articleSection" content="知识库搭建"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag3" role>知识库搭建</li></ul><meta property="keywords" content="知识库搭建"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 3 分钟</span><meta property="timeRequired" content="PT3M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><p>新注册的域名在短时间内是可以访问到的，但过一段时间后，就会提示「网站暂时无法访问」。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-1.png" alt=""></p><p>这就意味着我们需要对网站进行备案。关于网站备案，百度百科是这样解释的：</p><blockquote><p>网站备案的目的是为了防止在网上从事非法的网站经营活动，打击不良互联网信息的传播，如果网站不备案的话，很有可能被查处以后关停。</p></blockquote><p>那网站如何备案呢？</p><p>登录你购买服务器的服务器厂商官网，就可以进行网站备案。我购买的是阿里云服务器，所以这里以阿里云为例。</p><p>登录阿里云，点击「ICP 备案」（指网站在信息产业部提交网站信息进行官方认可）菜单，点击「开始备案」。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-2.png" alt=""></p><p>初次备案的小伙伴建议看一遍「秒懂备案」的视频，对备案进行简单地了解，方便后续操作的时候对备案有一个大致的印象。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-3.png" alt=""></p><p>填写基本信息。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-4.png" alt=""></p><p>点击「信息校验」，通过后进入下一步。如果不通过，按照对应提示信息进行修改，一般新注册的域名需要 3 天的实名认证审核周期。</p><p>填写主办者信息：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-5.png" alt=""></p><p>填写网站信息：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-6.png" alt=""></p><p>完成后会提示我们下载「阿里云 APP」上传一些资料，主要是方便上传身份证和人脸认证（注意不要带眼镜，否则容易校验不通过，踩坑人良心建议）。</p><p>提交初审后，记得接听电话。</p><p>这一步审核通过后，会受到工信部的短信核验，记得及时处理。然后等待管局审核，预计 9 天左右。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-7.png" alt=""></p><p>我差不多等了一周左右，管局审核终于通过了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-8.png" alt=""></p><p>现在立刻马上，登录<a href="http://www.beian.gov.cn/portal/index" target="_blank" rel="noopener noreferrer">全国互联网安全管理平台<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>注册登录提交公安联网备案申请。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-9.png" alt=""></p><p>填写申请信息的时候最好不要用 Safari 浏览器，不然会提示要安装 flash 插件（果然政企网站的技术都非常地追求稳定啊）。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-10.png" alt=""></p><p>macOS 系统可以选择用 Chrome 浏览器。</p><p>这里吐槽一点，就是在新办网站申请的「域名证书」填写时，要求的证书大小不能超过 400kb，但从阿里云上下载的 492kb，真的是。。。。</p><p>幸好，这一项是非必选项。</p><p>提交后再次等待审核。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-11.png" alt=""></p><p>等了四天，上去看了一下，审核通过了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-12.png" alt=""></p><p>我们需要做的是下载备案编号图标和复制备案编号 HTML 代码到网站上。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-13.png" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/szjy/record-domain.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 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clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">八、知识库搭建</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/szjy/buy-cloud-server.html" class="nav-link sidebar-link sidebar-page" aria-label="购买云服务器"><!---->购买云服务器<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/szjy/install-baota-mianban.html" class="nav-link sidebar-link sidebar-page" aria-label="安装宝塔面板"><!---->安装宝塔面板<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/szjy/buy-domain.html" class="nav-link sidebar-link sidebar-page" aria-label="购买域名&amp;域名解析"><!---->购买域名&amp;域名解析<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/szjy/record-domain.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="备案域名"><!---->备案域名<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/szjy/https-domain.html" class="nav-link sidebar-link sidebar-page" aria-label="给域名配置HTTPS证书"><!---->给域名配置HTTPS证书<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->备案域名</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年6月8日</span><meta property="datePublished" content="2022-06-08T06:51:04.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category3" role>知识库搭建</li><meta property="articleSection" content="知识库搭建"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag3" role>知识库搭建</li></ul><meta property="keywords" content="知识库搭建"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 3 分钟</span><meta property="timeRequired" content="PT3M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><p>新注册的域名在短时间内是可以访问到的，但过一段时间后，就会提示「网站暂时无法访问」。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-1.png" alt=""></p><p>这就意味着我们需要对网站进行备案。关于网站备案，百度百科是这样解释的：</p><blockquote><p>网站备案的目的是为了防止在网上从事非法的网站经营活动，打击不良互联网信息的传播，如果网站不备案的话，很有可能被查处以后关停。</p></blockquote><p>那网站如何备案呢？</p><p>登录你购买服务器的服务器厂商官网，就可以进行网站备案。我购买的是阿里云服务器，所以这里以阿里云为例。</p><p>登录阿里云，点击「ICP 备案」（指网站在信息产业部提交网站信息进行官方认可）菜单，点击「开始备案」。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-2.png" alt=""></p><p>初次备案的小伙伴建议看一遍「秒懂备案」的视频，对备案进行简单地了解，方便后续操作的时候对备案有一个大致的印象。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-3.png" alt=""></p><p>填写基本信息。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-4.png" alt=""></p><p>点击「信息校验」，通过后进入下一步。如果不通过，按照对应提示信息进行修改，一般新注册的域名需要 3 天的实名认证审核周期。</p><p>填写主办者信息：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-5.png" alt=""></p><p>填写网站信息：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-6.png" alt=""></p><p>完成后会提示我们下载「阿里云 APP」上传一些资料，主要是方便上传身份证和人脸认证（注意不要带眼镜，否则容易校验不通过，踩坑人良心建议）。</p><p>提交初审后，记得接听电话。</p><p>这一步审核通过后，会受到工信部的短信核验，记得及时处理。然后等待管局审核，预计 9 天左右。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-7.png" alt=""></p><p>我差不多等了一周左右，管局审核终于通过了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-8.png" alt=""></p><p>现在立刻马上，登录<a href="http://www.beian.gov.cn/portal/index" target="_blank" rel="noopener noreferrer">全国互联网安全管理平台<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>注册登录提交公安联网备案申请。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-9.png" alt=""></p><p>填写申请信息的时候最好不要用 Safari 浏览器，不然会提示要安装 flash 插件（果然政企网站的技术都非常地追求稳定啊）。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-10.png" alt=""></p><p>macOS 系统可以选择用 Chrome 浏览器。</p><p>这里吐槽一点，就是在新办网站申请的「域名证书」填写时，要求的证书大小不能超过 400kb，但从阿里云上下载的 492kb，真的是。。。。</p><p>幸好，这一项是非必选项。</p><p>提交后再次等待审核。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-11.png" alt=""></p><p>等了四天，上去看了一下，审核通过了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-12.png" alt=""></p><p>我们需要做的是下载备案编号图标和复制备案编号 HTML 代码到网站上。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-beian-13.png" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/szjy/record-domain.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 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class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->使用docsify+Git+GitHub+码云+阿里云服务器搭建知识库网站</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 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aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category3" role>知识库搭建历程</li><meta property="articleSection" content="知识库搭建历程"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag0" role>辅助工具</li><li class="tag tag1" role>轮子</li></ul><meta property="keywords" content="辅助工具,轮子"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 8 分钟</span><meta property="timeRequired" content="PT8M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/szjy/tobebetterjavaer-wangzhan-shangxian.html#解决方案一" class="router-link-active router-link-exact-active toc-link level3">解决方案一</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/szjy/tobebetterjavaer-wangzhan-shangxian.html#解决方案二" class="router-link-active router-link-exact-active toc-link level3">解决方案二</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="使用docsify-git-github-码云-阿里云服务器搭建知识库网站" tabindex="-1"><a class="header-anchor" href="#使用docsify-git-github-码云-阿里云服务器搭建知识库网站" aria-hidden="true">#</a> 使用docsify+Git+GitHub+码云+阿里云服务器搭建知识库网站</h1><p>大家好，我是二哥呀！</p><p>2022 年 1 月 1 日，<strong>二哥的《Java 程序员进阶之路》网站终于上线了</strong>！10 天过去了，网站在没有 SEO 的加持下访问量也突破了 1000 pu，算是一个小小的里程碑吧。</p><p>往下看，你不仅会直呼这个网站的颜值贼高，丝毫不输 B 站上那些舞蹈区的小姐姐，hhh，另外你还会学到如何从0 到 1搭建一个个人的学习网站。</p><p>经常逛 GitHub 的小伙伴应该已经发现了，二哥的《Java 程序员进阶之路》最近在持续霸榜，今天仍然在 GitHub 的周榜上。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-wangzhan-shangxian-01.png" alt=""></p><p>这也是 2021-2022 年二哥收获的最后一点点小惊喜了。</p><p>原来的《Java 程序员进阶之路》网站是托管在码云 Pages 上的，而码云 Pages 没办法自定义域名，这样就很不利于小伙伴们直接通过网址去访问。</p><blockquote><p>码云 Pages：https://itwanger.gitee.io/tobebetterjavaer</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-wangzhan-shangxian-02.png" alt=""></p><p>怎么解决这个问题呢？</p><p>。。。。。。</p><p>让我先来给大家铺垫一下这个码云 Pages 是如何服务的，搞清楚了状况后，我们就容易想到解决办法。</p><p>首先，《Java 程序员进阶之路》专栏的源头是 GitHub 上的一个开源仓库。</p><blockquote><p>GitHub 地址：https://github.com/itwanger/toBeBetterJavaer</p></blockquote><p>里面除了 md 文档和图片之外，还有代码示例，以及 docsify 的基础环境文件。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-wangzhan-shangxian-03.png" alt=""></p><ul><li>index.html 入口文件</li><li>README.md 会做为主页内容渲染</li><li>.nojekyll 用于阻止 GitHub Pages 忽略掉下划线开头的文件</li><li>_sidebar.md 会做为侧边栏内容渲染</li><li>_coverpage.md 会做为封面图渲染</li></ul><p>docsify 是一个神奇的文档网站生成器，不同于 GitBook、Hexo 的是，它不会生成静态的 .html 文件，所有转换工作都是在运行时发生的。只需要一个 index.html 文件以及一些基础配置文件就可以开始编写文档，并直接托管在 GitHub Pages 上（省去了服务器的钱）。</p><p>不过，由于 GitHub 的网络访问原因，我就将 《Java 程序员进阶之路》专栏同步到了码云，用码云 Pages 来替代 GitHub Pages，这样的网络访问速度会快很多。</p><blockquote><p>码云地址：https://gitee.com/itwanger/toBeBetterJavaer</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-wangzhan-shangxian-04.png" alt=""></p><p>同时，码云 Pages 也支持 Jekyll、Hugo、Hexo、docsify 等静态网站的服务。当 GitHub 仓库有更新后，直接在 GitHub Pages 上点一下刷新图标就会立即完成网站服务的同步工作。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-wangzhan-shangxian-05.png" alt=""></p><p>通过码云 Pages 提供的网址就可以访问《Java 程序员进阶之路》网址了。</p><p>但由于种种原因，码云 Pages 没有提供自定义域名+ HTTPS 的服务，Pro 版支持，但也因为业务调整，关闭了个人用户的购买入口。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-wangzhan-shangxian-06.png" alt=""></p><p>这就很扯了。</p><h3 id="解决方案一" tabindex="-1"><a class="header-anchor" href="#解决方案一" aria-hidden="true">#</a> 解决方案一</h3><p>这是最容易想到的办法，也是最笨的办法：<strong>将本地仓库上传到云服务器，通过 Nginx 部署静态网站</strong>。</p><p>在上传服务器之前，让我们先来确认一下本地的 docsify 目录是否是完整的。因此我们需要在本地运行起来 docsify 服务。</p><p>进入本地《Java 程序员进阶之路》的仓库目录，执行 <code>docsify serve</code> 启动服务。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-wangzhan-shangxian-07.png" alt=""></p><p>在浏览器地址栏访问 <code>http://localhost:3000</code>：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-wangzhan-shangxian-08.png" alt=""></p><p>可以确认是没有问题的。</p><p>然后将本地的文件上传到云服务器上，再通过 Nginx 部署静态网站就 OK 了。</p><p>不过，这样做会存在一个很严重的问题，就是云服务器和本地、GitHub 仓库之间没办法进行同步。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-wangzhan-shangxian-09.png" alt=""></p><h3 id="解决方案二" tabindex="-1"><a class="header-anchor" href="#解决方案二" aria-hidden="true">#</a> 解决方案二</h3><p>这是比较完善一点的解决方案：<strong>在服务器上搭建一个 Git 仓库，从 GitHub 上拉取，再通过 Nginx 部署静态网站</strong>。</p><p>这样就很容易解决掉仓库之间不同步的问题，因为 GitHub 仓库提交的一定是正式版本，也是最新版本，从上面拉取是最方便和稳妥的。本地会做一些测试工作，比如说调整 docsify 的配置等等，不适合作为云服务器拉取的对象。</p><p>关于 Git 环境的搭建，我在《Java 程序员进阶之路》专栏的「Git」篇里已经详细的讲解了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-wangzhan-shangxian-10.png" alt=""></p><p>搭建过程我这里简单演示下。</p><p><strong>第一步，安装 Git</strong></p><p>CentOS 上可以直接通过 <code>yum install git</code> 命令来安装 Git 环境。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-wangzhan-shangxian-11.png" alt=""></p><p><strong>第二步，初始化 Git</strong></p><p>执行 <code>git init</code> 初始化 Git 目录。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-wangzhan-shangxian-12.png" alt=""></p><p><strong>第三步，克隆 GitHub 仓库到云服务器</strong></p><p>为了使 GitHub 相信所有的操作都是“你本人”操作的，所以在 clone 之前需要先配置 SSH 密钥。具体的步骤可参考：<a href="https://mp.weixin.qq.com/s/Fhh5-7AFDUThmd4tsyA55Q" target="_blank" rel="noopener noreferrer">崩溃！实习生把小组的代码仓库搞得一团糟。。。<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>这篇中的「远程仓库」小节。</p><p>这里就不再演示了。</p><p>在 GitHub 仓库上点击「Code」菜单，复制 SSH 地址。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-wangzhan-shangxian-13.png" alt=""></p><p>然后执行 <code>git clone</code> 命令就可以从远程仓库上拉取到最新内容了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-wangzhan-shangxian-14.png" alt=""></p><p><strong>第四步，通过 Nginx 部署静态网站</strong></p><p><a href="https://mp.weixin.qq.com/s/OYOcjUwPZyPo8K4KAgJ4kw" target="_blank" rel="noopener noreferrer">Nginx<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a> 非常适合用来部署静态网站，只需要将服务器的访问目录设定为 index.html 文件就可以了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-wangzhan-shangxian-15.png" alt=""></p><p>OK，此时再访问域名 <code>https://tobebetterjavaer.com</code> 就可以看到《Java 程序员进阶之路》的内容了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-wangzhan-shangxian-16.png" alt=""></p><p>用这种方案的话，本地、GitHub、云服务器之间的同步就完全打通了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-wangzhan-shangxian-17.png" alt=""></p><p>当 GitHub 上有更新的时候，再将内容拉取到云服务器上。</p><p>举例来说，我们在《Java 程序员进阶之路》专栏的 GitHub 仓库中修改 _sidebar.md 文件，追加一个感叹号的标点符号。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-wangzhan-shangxian-18.png" alt=""></p><p>有两种办法拉取。</p><p>第一种，先执行 <code>git fetch</code>，再执行 <code>git merge</code>。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-wangzhan-shangxian-19.png" alt=""></p><p><code>9909f82..7f4b815 master -&gt; origin/master</code> 就表示内容有变动。</p><p>第二种，直接执行 <code>git pull</code> 命令。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-wangzhan-shangxian-20.png" alt=""></p><p>不过，这有一点不尽善尽美，每当 GitHub 上有更新的时候，还要手动在云服务器上拉取更新，能不能做到自动化呢？</p><p>可以利用<a href="https://mp.weixin.qq.com/s/ditN9J80rSWwnYRumwb4ww" target="_blank" rel="noopener noreferrer">宝塔面板<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>的计划任务，添加一个 Shell 脚本。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-wangzhan-shangxian-21.png" alt=""></p><p>脚本内容很简单，就两行内容：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code># 切换到 git 目录
+    <div id="app"><!--[--><!--[--><!--[--><span tabindex="-1"></span><a href="#main-content" class="skip-link sr-only">Skip to content</a><!--]--><div class="theme-container has-toc"><!--[--><!--[--><header class="navbar"><div class="navbar-left"><button class="toggle-sidebar-button" title="Toggle Sidebar"><span class="icon"></span></button><!----><a href="/" class="brand"><img class="logo" src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/logo-02.png" alt="Java 程序员进阶之路"><!----><span class="site-name hide-in-pad">Java 程序员进阶之路</span></a><!----></div><div class="navbar-center"><!----><nav class="nav-links"><div class="nav-item hide-in-mobile"><a href="/home.html" class="nav-link" aria-label="进阶之路"><span class="icon iconfont icon-lujing" style=""></span>进阶之路<!----></a></div><div class="nav-item hide-in-mobile"><a href="/zhishixingqiu/java-mianshi-zhinan.html" class="nav-link" aria-label="星球专栏"><span class="icon iconfont icon-Artboard" style=""></span>星球专栏<!----></a></div><div 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clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->使用docsify+Git+GitHub+码云+阿里云服务器搭建知识库网站</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 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40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category3" role>知识库搭建历程</li><meta property="articleSection" content="知识库搭建历程"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag 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16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 8 分钟</span><meta property="timeRequired" content="PT8M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/szjy/tobebetterjavaer-wangzhan-shangxian.html#解决方案一" class="router-link-active router-link-exact-active toc-link level3">解决方案一</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/szjy/tobebetterjavaer-wangzhan-shangxian.html#解决方案二" class="router-link-active router-link-exact-active toc-link level3">解决方案二</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="使用docsify-git-github-码云-阿里云服务器搭建知识库网站" tabindex="-1"><a class="header-anchor" href="#使用docsify-git-github-码云-阿里云服务器搭建知识库网站" aria-hidden="true">#</a> 使用docsify+Git+GitHub+码云+阿里云服务器搭建知识库网站</h1><p>大家好，我是二哥呀！</p><p>2022 年 1 月 1 日，<strong>二哥的《Java 程序员进阶之路》网站终于上线了</strong>！10 天过去了，网站在没有 SEO 的加持下访问量也突破了 1000 pu，算是一个小小的里程碑吧。</p><p>往下看，你不仅会直呼这个网站的颜值贼高，丝毫不输 B 站上那些舞蹈区的小姐姐，hhh，另外你还会学到如何从0 到 1搭建一个个人的学习网站。</p><p>经常逛 GitHub 的小伙伴应该已经发现了，二哥的《Java 程序员进阶之路》最近在持续霸榜，今天仍然在 GitHub 的周榜上。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-wangzhan-shangxian-01.png" alt=""></p><p>这也是 2021-2022 年二哥收获的最后一点点小惊喜了。</p><p>原来的《Java 程序员进阶之路》网站是托管在码云 Pages 上的，而码云 Pages 没办法自定义域名，这样就很不利于小伙伴们直接通过网址去访问。</p><blockquote><p>码云 Pages：https://itwanger.gitee.io/tobebetterjavaer</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-wangzhan-shangxian-02.png" alt=""></p><p>怎么解决这个问题呢？</p><p>。。。。。。</p><p>让我先来给大家铺垫一下这个码云 Pages 是如何服务的，搞清楚了状况后，我们就容易想到解决办法。</p><p>首先，《Java 程序员进阶之路》专栏的源头是 GitHub 上的一个开源仓库。</p><blockquote><p>GitHub 地址：https://github.com/itwanger/toBeBetterJavaer</p></blockquote><p>里面除了 md 文档和图片之外，还有代码示例，以及 docsify 的基础环境文件。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-wangzhan-shangxian-03.png" alt=""></p><ul><li>index.html 入口文件</li><li>README.md 会做为主页内容渲染</li><li>.nojekyll 用于阻止 GitHub Pages 忽略掉下划线开头的文件</li><li>_sidebar.md 会做为侧边栏内容渲染</li><li>_coverpage.md 会做为封面图渲染</li></ul><p>docsify 是一个神奇的文档网站生成器，不同于 GitBook、Hexo 的是，它不会生成静态的 .html 文件，所有转换工作都是在运行时发生的。只需要一个 index.html 文件以及一些基础配置文件就可以开始编写文档，并直接托管在 GitHub Pages 上（省去了服务器的钱）。</p><p>不过，由于 GitHub 的网络访问原因，我就将 《Java 程序员进阶之路》专栏同步到了码云，用码云 Pages 来替代 GitHub Pages，这样的网络访问速度会快很多。</p><blockquote><p>码云地址：https://gitee.com/itwanger/toBeBetterJavaer</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-wangzhan-shangxian-04.png" alt=""></p><p>同时，码云 Pages 也支持 Jekyll、Hugo、Hexo、docsify 等静态网站的服务。当 GitHub 仓库有更新后，直接在 GitHub Pages 上点一下刷新图标就会立即完成网站服务的同步工作。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-wangzhan-shangxian-05.png" alt=""></p><p>通过码云 Pages 提供的网址就可以访问《Java 程序员进阶之路》网址了。</p><p>但由于种种原因，码云 Pages 没有提供自定义域名+ HTTPS 的服务，Pro 版支持，但也因为业务调整，关闭了个人用户的购买入口。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-wangzhan-shangxian-06.png" alt=""></p><p>这就很扯了。</p><h3 id="解决方案一" tabindex="-1"><a class="header-anchor" href="#解决方案一" aria-hidden="true">#</a> 解决方案一</h3><p>这是最容易想到的办法，也是最笨的办法：<strong>将本地仓库上传到云服务器，通过 Nginx 部署静态网站</strong>。</p><p>在上传服务器之前，让我们先来确认一下本地的 docsify 目录是否是完整的。因此我们需要在本地运行起来 docsify 服务。</p><p>进入本地《Java 程序员进阶之路》的仓库目录，执行 <code>docsify serve</code> 启动服务。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-wangzhan-shangxian-07.png" alt=""></p><p>在浏览器地址栏访问 <code>http://localhost:3000</code>：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-wangzhan-shangxian-08.png" alt=""></p><p>可以确认是没有问题的。</p><p>然后将本地的文件上传到云服务器上，再通过 Nginx 部署静态网站就 OK 了。</p><p>不过，这样做会存在一个很严重的问题，就是云服务器和本地、GitHub 仓库之间没办法进行同步。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-wangzhan-shangxian-09.png" alt=""></p><h3 id="解决方案二" tabindex="-1"><a class="header-anchor" href="#解决方案二" aria-hidden="true">#</a> 解决方案二</h3><p>这是比较完善一点的解决方案：<strong>在服务器上搭建一个 Git 仓库，从 GitHub 上拉取，再通过 Nginx 部署静态网站</strong>。</p><p>这样就很容易解决掉仓库之间不同步的问题，因为 GitHub 仓库提交的一定是正式版本，也是最新版本，从上面拉取是最方便和稳妥的。本地会做一些测试工作，比如说调整 docsify 的配置等等，不适合作为云服务器拉取的对象。</p><p>关于 Git 环境的搭建，我在《Java 程序员进阶之路》专栏的「Git」篇里已经详细的讲解了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-wangzhan-shangxian-10.png" alt=""></p><p>搭建过程我这里简单演示下。</p><p><strong>第一步，安装 Git</strong></p><p>CentOS 上可以直接通过 <code>yum install git</code> 命令来安装 Git 环境。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-wangzhan-shangxian-11.png" alt=""></p><p><strong>第二步，初始化 Git</strong></p><p>执行 <code>git init</code> 初始化 Git 目录。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-wangzhan-shangxian-12.png" alt=""></p><p><strong>第三步，克隆 GitHub 仓库到云服务器</strong></p><p>为了使 GitHub 相信所有的操作都是“你本人”操作的，所以在 clone 之前需要先配置 SSH 密钥。具体的步骤可参考：<a href="https://mp.weixin.qq.com/s/Fhh5-7AFDUThmd4tsyA55Q" target="_blank" rel="noopener noreferrer">崩溃！实习生把小组的代码仓库搞得一团糟。。。<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>这篇中的「远程仓库」小节。</p><p>这里就不再演示了。</p><p>在 GitHub 仓库上点击「Code」菜单，复制 SSH 地址。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-wangzhan-shangxian-13.png" alt=""></p><p>然后执行 <code>git clone</code> 命令就可以从远程仓库上拉取到最新内容了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-wangzhan-shangxian-14.png" alt=""></p><p><strong>第四步，通过 Nginx 部署静态网站</strong></p><p><a href="https://mp.weixin.qq.com/s/OYOcjUwPZyPo8K4KAgJ4kw" target="_blank" rel="noopener noreferrer">Nginx<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a> 非常适合用来部署静态网站，只需要将服务器的访问目录设定为 index.html 文件就可以了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-wangzhan-shangxian-15.png" alt=""></p><p>OK，此时再访问域名 <code>https://tobebetterjavaer.com</code> 就可以看到《Java 程序员进阶之路》的内容了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-wangzhan-shangxian-16.png" alt=""></p><p>用这种方案的话，本地、GitHub、云服务器之间的同步就完全打通了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-wangzhan-shangxian-17.png" alt=""></p><p>当 GitHub 上有更新的时候，再将内容拉取到云服务器上。</p><p>举例来说，我们在《Java 程序员进阶之路》专栏的 GitHub 仓库中修改 _sidebar.md 文件，追加一个感叹号的标点符号。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-wangzhan-shangxian-18.png" alt=""></p><p>有两种办法拉取。</p><p>第一种，先执行 <code>git fetch</code>，再执行 <code>git merge</code>。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-wangzhan-shangxian-19.png" alt=""></p><p><code>9909f82..7f4b815 master -&gt; origin/master</code> 就表示内容有变动。</p><p>第二种，直接执行 <code>git pull</code> 命令。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-wangzhan-shangxian-20.png" alt=""></p><p>不过，这有一点不尽善尽美，每当 GitHub 上有更新的时候，还要手动在云服务器上拉取更新，能不能做到自动化呢？</p><p>可以利用<a href="https://mp.weixin.qq.com/s/ditN9J80rSWwnYRumwb4ww" target="_blank" rel="noopener noreferrer">宝塔面板<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>的计划任务，添加一个 Shell 脚本。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-wangzhan-shangxian-21.png" alt=""></p><p>脚本内容很简单，就两行内容：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code># 切换到 git 目录
 cd /home/www/git/toBeBetterJavaer
 # 执行git命令
 git pull
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>保存后我们来测试下。</p><p>我们在《Java 程序员进阶之路》专栏的 GitHub 仓库中修改 _sidebar.md 文件，修改中文的感叹号为英文的感叹号。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-wangzhan-shangxian-22.png" alt=""></p><p>点击计划任务的「执行」按钮。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-wangzhan-shangxian-23.png" alt=""></p><p>查看云服务器上的文件是否发生了变化。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-wangzhan-shangxian-24.png" alt=""></p><p>到此为止，我们就完成了《Java 程序员进阶之路》网站从码云 Pages 到 VPS（Virtual private server，虚拟专用服务器）迁移的整个工作。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-wangzhan-shangxian-25.png" alt=""></p><p>最后，再带着大家使用<a href="https://busuanzi.ibruce.info/" target="_blank" rel="noopener noreferrer">不蒜子<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>给网站加一个总访问次数和总访客数吧，看看一个月后《Java 程序员进阶之路》的 PV 有多少。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;script async src=&quot;//busuanzi.ibruce.info/busuanzi/2.3/busuanzi.pure.mini.js&quot;&gt;&lt;/script&gt;
 &lt;span id=&quot;busuanzi_container_site_pv&quot;&gt;本站总访问量&lt;span id=&quot;busuanzi_value_site_pv&quot;&gt;&lt;/span&gt;次&lt;/span&gt;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><p>两行代码，一行引入 JS 文件，一行展示数据。</p><p>刷新网页，发现已经有了哈，我是第一个。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-wangzhan-shangxian-26.png" alt=""></p><p>紧接着，可以把 GitHub/码云上的预览链接从码云 Pages 修改为 <code>https://tobebetterjavaer.com</code> 了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tobebetterjavaer-wangzhan-shangxian-27.png" alt=""></p><p>简单总结一波：为了搭建这个网站，真的是能学到非常多的实战知识，比如说：</p><ul><li>HTTP 升级为 HTTPS</li><li>Nginx 配置静态资源</li><li>域名解析</li><li>SSL 证书生成</li><li>Git 的基本使用</li><li>宝塔面板的基本使用</li><li>Tabby 终端的基本使用</li><li>域名备案</li><li>等等等等</li></ul><p>如果大家有时间的话，强烈建议大家动手去搭一个，尤其是之前白票过阿里云服务器的小伙伴，动过手后你才会真正地学到实战经验。</p><p>2022 年，二哥一定会继续肝出更多优质的原创，丰富《Java 程序员进阶之路》的内容，希望这个专栏日后成为大家学习 Java 的第一选择！</p><hr><p><em>没有什么使我停留——除了目的，纵然岸旁有玫瑰、有绿荫、有宁静的港湾，我是不系之舟</em>。</p><p>我们下期见~</p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png"></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/szjy/tobebetterjavaer-wangzhan-shangxian.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/12 下午4:24:21</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><!----><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/szjy/tupian-zhuanlian.html#二、关于-java-爬虫" class="router-link-active router-link-exact-active toc-link level3">二、关于 Java 爬虫</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/szjy/tupian-zhuanlian.html#三、实战-jsoup" class="router-link-active router-link-exact-active toc-link level3">三、实战 jsoup</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/szjy/tupian-zhuanlian.html#四、下载图片" class="router-link-active router-link-exact-active toc-link level3">四、下载图片</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/szjy/tupian-zhuanlian.html#五、使用-cdn-加速图片" class="router-link-active router-link-exact-active toc-link level3">五、使用 CDN 加速图片</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/szjy/tupian-zhuanlian.html#六、一点小心得" class="router-link-active router-link-exact-active toc-link level3">六、一点小心得</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><p>作为一名技术博主，经常需要把同一份 MD 文件同步到不同的博客平台，以求获得更多的曝光，从而帮助到更多的小伙伴——瞧我这“达则兼济天下”的雄心壮志。像 CSDN 和掘金这两个博客平台都有自己的外链图片解析功能。</p><p>当我把 MD 源文档复制到 CSDN 或者掘金的编辑器中，它们会自动地帮我把外链转成内链，这样我就不用再重新上传图片，也不需要配置自己的图床了，否则图片会因为防盗链的原因显示不出来。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>举个例子，现在有这样一段 MD 文档，里面有一张图片。
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123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 5 分钟</span><meta property="timeRequired" content="PT5M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/szjy/tupian-zhuanlian.html#二、关于-java-爬虫" class="router-link-active router-link-exact-active toc-link level3">二、关于 Java 爬虫</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/szjy/tupian-zhuanlian.html#三、实战-jsoup" class="router-link-active router-link-exact-active toc-link level3">三、实战 jsoup</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/szjy/tupian-zhuanlian.html#四、下载图片" class="router-link-active router-link-exact-active toc-link level3">四、下载图片</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/szjy/tupian-zhuanlian.html#五、使用-cdn-加速图片" class="router-link-active router-link-exact-active toc-link level3">五、使用 CDN 加速图片</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/szjy/tupian-zhuanlian.html#六、一点小心得" class="router-link-active router-link-exact-active toc-link level3">六、一点小心得</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><p>作为一名技术博主，经常需要把同一份 MD 文件同步到不同的博客平台，以求获得更多的曝光，从而帮助到更多的小伙伴——瞧我这“达则兼济天下”的雄心壮志。像 CSDN 和掘金这两个博客平台都有自己的外链图片解析功能。</p><p>当我把 MD 源文档复制到 CSDN 或者掘金的编辑器中，它们会自动地帮我把外链转成内链，这样我就不用再重新上传图片，也不需要配置自己的图床了，否则图片会因为防盗链的原因显示不出来。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>举个例子，现在有这样一段 MD 文档，里面有一张图片。
 
 ![](http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tupian-zhuanlian-1.png)
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>把上面的 MD 文档复制到掘金编辑器的时候，就会出现「图片解析中...」！但会一直卡在这里，再也解析不下去了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tupian-zhuanlian-2.png" alt=""></p><p>这是因为图片加了防盗链，掘金这么牛逼的社区在解析的时候也会失败。CSDN 的转链功能更牛逼一点，基本上可以无视防盗链。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tupian-zhuanlian-3.png" alt=""></p><p>还有一些博客平台是没有转链功能的，比如说二哥的静态小破站《Java 程序员进阶之路》。怎么办呢？我一开始的解决方案是：</p><ul><li>先将图片手动一张张下载到本地</li><li>再将本地图片上传到 GitHub 指定的仓库</li><li>修改 MD 文档中的图片链接，使用 CDN 加速服务</li></ul><p>这样就能解决问题，但是需要手动去做这些重复的动作，尤其遇到一篇文章有二三十张图片的时候就很烦。这有点丧失我作为程序员的尊严啊！</p><p>首先要解决的是图片下载的问题，可以利用爬虫技术：爬虫爬得早，局子进的早。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tupian-zhuanlian-4.png" alt=""></p><h3 id="二、关于-java-爬虫" tabindex="-1"><a class="header-anchor" href="#二、关于-java-爬虫" aria-hidden="true">#</a> 二、关于 Java 爬虫</h3><p>Java 爬虫的类库非常多，比如说 crawler4j，我个人更喜欢 jsoup，它更轻量级。jsoup 是一款用于解析 HTML 的 Java 类库，提供了一套非常便捷的 API，用于提取和操作数据。</p><blockquote><p>官网地址：https://jsoup.org/</p></blockquote><p>jsoup 目前在 GitHub 上已经收获 9.3k+ 的 star，可以说是非常的受欢迎了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tupian-zhuanlian-5.png" alt=""></p><p>jsoup 有以下特性：</p><ul><li>可以从 URL、文件或者字符串中抓取和解析</li><li>可以使用 DOM 遍历或者 CSS 选择器查找和提取数据</li><li>可以操作 HTML 元素、属性和文本</li><li>可以输出整洁的 HTML</li></ul><h3 id="三、实战-jsoup" tabindex="-1"><a class="header-anchor" href="#三、实战-jsoup" aria-hidden="true">#</a> 三、实战 jsoup</h3><p><strong>第一步，添加 jsoup 依赖到项目中</strong>。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;dependency&gt;
@@ -89,6 +89,6 @@ for (String line : list) {
 }
 writer.flush();
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>到此为止，整个代码的编写工作就告一段落了。很简单，两个类库，几行代码就搞定了！</p><p>转换前的 MD 文件如下所示：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tupian-zhuanlian-8.png" alt=""></p><p>运行代码转换后，发现图片地址已经变成 jsDelivr CDN 图库了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tupian-zhuanlian-9.png" alt=""></p><p>使用 GitHub 桌面版把图片和 MD 文档提交到 GitHub 仓库后，就可以看到图片已经加载完成可以访问了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tupian-zhuanlian-10.png" alt=""></p><h3 id="六、一点小心得" tabindex="-1"><a class="header-anchor" href="#六、一点小心得" aria-hidden="true">#</a> 六、一点小心得</h3><p>不得不说，懂点技术，还是非常爽的。撸了几行代码，解放了双手，可以干点正经事了（狗头）。</p><p>这不，重新把《Java 程序员进阶之路》的小破站整理排版了一下，新增了不少优质的内容。学习 Java 的小伙伴可以开卷了，有需要增加的内容也欢迎提交 issue 啊！</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/szjy/tupian-zhuanlian-11.png" alt=""></p><p>再次感谢各位小伙伴的厚爱，我也会一如既往地完善这个专栏，我们下期见~</p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png"></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/szjy/tupian-zhuanlian.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/12 下午4:24:21</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><!----><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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aria-label="一、前言"><!---->一、前言<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">二、Java核心</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.1 Java概述</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.2 Java基础语法</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.3 面向对象编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.4 字符串&amp;数组</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.5 集合框架（容器）</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.6 IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">2.11 并发编程</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/thread/wangzhe-thread.html" class="nav-link sidebar-link sidebar-page" aria-label="创建Java线程的3种方式"><!---->创建Java线程的3种方式<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/thread-state-and-method.html" class="nav-link sidebar-link sidebar-page" aria-label="线程的6种状态及切换"><!---->线程的6种状态及切换<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/thread-group-and-thread-priority.html" class="nav-link sidebar-link sidebar-page" aria-label="线程组和线程优先级"><!---->线程组和线程优先级<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/why-need-thread.html" class="nav-link sidebar-link sidebar-page" aria-label="进程与线程的区别"><!---->进程与线程的区别<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/thread-bring-some-problem.html" class="nav-link sidebar-link sidebar-page" aria-label="并发编程带来了哪些问题"><!---->并发编程带来了哪些问题<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/jmm.html" class="nav-link sidebar-link sidebar-page" aria-label="Java内存模型"><!---->Java内存模型<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/volatile.html" class="nav-link sidebar-link sidebar-page" aria-label="volatile"><!---->volatile<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/synchronized.html" class="nav-link sidebar-link sidebar-page" aria-label="synchronized"><!---->synchronized<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/cas.html" class="nav-link sidebar-link sidebar-page" aria-label="CAS的原理"><!---->CAS的原理<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/aqs.html" class="nav-link sidebar-link sidebar-page" aria-label="AQS详解"><!---->AQS详解<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/lock.html" class="nav-link sidebar-link sidebar-page" aria-label="锁"><!---->锁<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/reentrantLock.html" class="nav-link sidebar-link sidebar-page" aria-label="重入锁ReentrantLock"><!---->重入锁ReentrantLock<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ReentrantReadWriteLock.html" class="nav-link sidebar-link sidebar-page" aria-label="读写锁ReentrantReadWriteLock"><!---->读写锁ReentrantReadWriteLock<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/condition.html" class="nav-link sidebar-link sidebar-page" aria-label="线程协作类Condition"><!---->线程协作类Condition<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/LockSupport.html" class="nav-link sidebar-link sidebar-page" aria-label="线程阻塞唤醒类LockSupport"><!---->线程阻塞唤醒类LockSupport<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/map.html" class="nav-link sidebar-link sidebar-page" aria-label="并发集合容器"><!---->并发集合容器<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ConcurrentHashMap.html" class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentHashMap"><!---->ConcurrentHashMap<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ConcurrentLinkedQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentLinkedQueue"><!---->ConcurrentLinkedQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CopyOnWriteArrayList.html" class="nav-link sidebar-link sidebar-page" aria-label="CopyOnWriteArrayList"><!---->CopyOnWriteArrayList<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ThreadLocal.html" class="nav-link sidebar-link sidebar-page" aria-label="ThreadLocal"><!---->ThreadLocal<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/thread/BlockingQueue.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="BlockingQueue"><!---->BlockingQueue<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/BlockingQueue.html#基本操作" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="基本操作"><!---->基本操作<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/BlockingQueue.html#常用的blockingqueue" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="常用的BlockingQueue"><!---->常用的BlockingQueue<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/BlockingQueue.html#arrayblockingqueue" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="ArrayBlockingQueue"><!---->ArrayBlockingQueue<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/BlockingQueue.html#linkedblockingqueue" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="LinkedBlockingQueue"><!---->LinkedBlockingQueue<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/BlockingQueue.html#priorityblockingqueue" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="PriorityBlockingQueue"><!---->PriorityBlockingQueue<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/BlockingQueue.html#synchronousqueue" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="SynchronousQueue"><!---->SynchronousQueue<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/BlockingQueue.html#linkedtransferqueue" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="LinkedTransferQueue"><!---->LinkedTransferQueue<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/BlockingQueue.html#linkedblockingdeque" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="LinkedBlockingDeque"><!---->LinkedBlockingDeque<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/BlockingQueue.html#delayqueue" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="DelayQueue"><!---->DelayQueue<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li></ul><!--]--></li><li><!--[--><a href="/thread/pool.html" class="nav-link sidebar-link sidebar-page" aria-label="线程池"><!---->线程池<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ScheduledThreadPoolExecutor.html" class="nav-link sidebar-link sidebar-page" aria-label="计划任务"><!---->计划任务<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/atomic.html" class="nav-link sidebar-link sidebar-page" aria-label="原子操作类"><!---->原子操作类<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CountDownLatch.html" class="nav-link sidebar-link sidebar-page" aria-label="通信工具类CountDownLatch"><!---->通信工具类CountDownLatch<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/fork-join.html" class="nav-link sidebar-link sidebar-page" aria-label="Fork/Join框架"><!---->Fork/Join框架<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/shengchanzhe-xiaofeizhe.html" class="nav-link sidebar-link sidebar-page" aria-label="生产者-消费者模式"><!---->生产者-消费者模式<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->吊打Java并发面试官之BlockingQueue</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月23日</span><meta property="datePublished" content="2022-03-23T12:08:58.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><li class="category category6" role>并发编程</li><meta property="articleSection" content="Java核心,并发编程"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg 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class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/BlockingQueue.html#基本操作" class="router-link-active router-link-exact-active toc-link level2">基本操作</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/BlockingQueue.html#常用的blockingqueue" class="router-link-active router-link-exact-active toc-link level2">常用的BlockingQueue</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/BlockingQueue.html#arrayblockingqueue" class="router-link-active router-link-exact-active toc-link level3">ArrayBlockingQueue</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/BlockingQueue.html#linkedblockingqueue" class="router-link-active router-link-exact-active toc-link level3">LinkedBlockingQueue</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/BlockingQueue.html#priorityblockingqueue" class="router-link-active router-link-exact-active toc-link level3">PriorityBlockingQueue</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/BlockingQueue.html#synchronousqueue" class="router-link-active router-link-exact-active toc-link level3">SynchronousQueue</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/BlockingQueue.html#linkedtransferqueue" class="router-link-active router-link-exact-active toc-link level3">LinkedTransferQueue</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/BlockingQueue.html#linkedblockingdeque" class="router-link-active router-link-exact-active toc-link level3">LinkedBlockingDeque</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/BlockingQueue.html#delayqueue" class="router-link-active router-link-exact-active toc-link level3">DelayQueue</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><p>最常用的&quot;<strong>生产者-消费者</strong>&quot;问题中，队列通常被视作线程间操作的数据容器，这样，可以对各个模块的业务功能进行解耦，生产者将“生产”出来的数据放置在数据容器中，而消费者仅仅只需要在“数据容器”中进行获取数据即可，这样生产者线程和消费者线程就能够进行解耦，只专注于自己的业务功能即可。</p><p>阻塞队列（BlockingQueue）被广泛使用在“生产者-消费者”问题中，其原因是BlockingQueue提供了可阻塞的插入和移除的方法。<strong>当队列容器已满，生产者线程会被阻塞，直到队列未满；当队列容器为空时，消费者线程会被阻塞，直至队列非空时为止</strong>。</p><h2 id="基本操作" tabindex="-1"><a class="header-anchor" href="#基本操作" aria-hidden="true">#</a> 基本操作</h2><p>BlockingQueue基本操作总结如下（此图来源于JAVA API文档）：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/BlockingQueue-01.png" alt=""></p><p>BlockingQueue继承于Queue接口，因此，对数据元素的基本操作有：</p><p>1）插入元素</p><ol><li>add(E e) ：往队列插入数据，当队列满时，插入元素时会抛出IllegalStateException异常；</li><li>offer(E e)：当往队列插入数据时，插入成功返回<code>true</code>，否则则返回<code>false</code>。当队列满时不会抛出异常；</li></ol><p>2）删除元素</p><ol><li>remove(Object o)：从队列中删除数据，成功则返回<code>true</code>，否则为<code>false</code></li><li>poll：删除数据，当队列为空时，返回null；</li></ol><p>3）查看元素</p><ol><li>element：获取队头元素，如果队列为空时则抛出NoSuchElementException异常；</li><li>peek：获取队头元素，如果队列为空则抛出NoSuchElementException异常</li></ol><p>BlockingQueue具有的特殊操作：</p><p>1）插入数据：</p><ol><li>put：当阻塞队列容量已经满时，往阻塞队列插入数据的线程会被阻塞，直至阻塞队列已经有空余的容量可供使用；</li><li><code>offer(E e, long timeout, TimeUnit unit)</code>：若阻塞队列已经满时，同样会阻塞插入数据的线程，直至阻塞队列已经有空余的地方，与put方法不同的是，该方法会有一个超时时间，若超过当前给定的超时时间，插入数据的线程会退出；</li></ol><p>2）删除数据</p><ol><li><code>take()</code>：当阻塞队列为空时，获取队头数据的线程会被阻塞；</li><li><code>poll(long timeout, TimeUnit unit)</code>：当阻塞队列为空时，获取数据的线程会被阻塞，另外，如果被阻塞的线程超过了给定的时长，该线程会退出</li></ol><h2 id="常用的blockingqueue" tabindex="-1"><a class="header-anchor" href="#常用的blockingqueue" aria-hidden="true">#</a> 常用的BlockingQueue</h2><p>实现BlockingQueue接口的有<code>ArrayBlockingQueue, DelayQueue, LinkedBlockingDeque, LinkedBlockingQueue, LinkedTransferQueue, PriorityBlockingQueue, SynchronousQueue</code>，而这几种常见的阻塞队列也是在实际编程中会常用的，下面对这几种常见的阻塞队列进行说明：</p><h3 id="arrayblockingqueue" tabindex="-1"><a class="header-anchor" href="#arrayblockingqueue" aria-hidden="true">#</a> ArrayBlockingQueue</h3><p><strong>ArrayBlockingQueue</strong>是由数组实现的有界阻塞队列。该队列命令元素FIFO（先进先出）。因此，对头元素时队列中存在时间最长的数据元素，而对尾数据则是当前队列最新的数据元素。ArrayBlockingQueue可作为“有界数据缓冲区”，生产者插入数据到队列容器中，并由消费者提取。ArrayBlockingQueue一旦创建，容量不能改变。</p><p>当队列容量满时，尝试将元素放入队列将导致操作阻塞;尝试从一个空队列中取一个元素也会同样阻塞。</p><p>ArrayBlockingQueue默认情况下不能保证线程访问队列的公平性，所谓公平性是指严格按照线程等待的绝对时间顺序，即最先等待的线程能够最先访问到ArrayBlockingQueue。而非公平性则是指访问ArrayBlockingQueue的顺序不是遵守严格的时间顺序，有可能存在，一旦ArrayBlockingQueue可以被访问时，长时间阻塞的线程依然无法访问到ArrayBlockingQueue。<strong>如果保证公平性，通常会降低吞吐量</strong>。如果需要获得公平性的ArrayBlockingQueue，可采用如下代码：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">private</span> <span class="token keyword">static</span> <span class="token class-name">ArrayBlockingQueue</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">Integer</span><span class="token punctuation">&gt;</span></span> blockingQueue <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">ArrayBlockingQueue</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">Integer</span><span class="token punctuation">&gt;</span></span><span class="token punctuation">(</span><span class="token number">10</span><span class="token punctuation">,</span><span class="token boolean">true</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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class="sidebar-heading clickable"><!----><span class="title">2.6 IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">2.11 并发编程</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/thread/wangzhe-thread.html" class="nav-link sidebar-link sidebar-page" aria-label="创建Java线程的3种方式"><!---->创建Java线程的3种方式<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/thread-state-and-method.html" class="nav-link sidebar-link sidebar-page" aria-label="线程的6种状态及切换"><!---->线程的6种状态及切换<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/thread-group-and-thread-priority.html" class="nav-link sidebar-link sidebar-page" aria-label="线程组和线程优先级"><!---->线程组和线程优先级<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/why-need-thread.html" class="nav-link sidebar-link sidebar-page" aria-label="进程与线程的区别"><!---->进程与线程的区别<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/thread-bring-some-problem.html" class="nav-link sidebar-link sidebar-page" aria-label="并发编程带来了哪些问题"><!---->并发编程带来了哪些问题<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/jmm.html" class="nav-link sidebar-link sidebar-page" aria-label="Java内存模型"><!---->Java内存模型<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/volatile.html" class="nav-link sidebar-link sidebar-page" aria-label="volatile"><!---->volatile<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/synchronized.html" class="nav-link sidebar-link sidebar-page" aria-label="synchronized"><!---->synchronized<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/cas.html" class="nav-link sidebar-link sidebar-page" aria-label="CAS的原理"><!---->CAS的原理<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/aqs.html" class="nav-link sidebar-link sidebar-page" aria-label="AQS详解"><!---->AQS详解<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/lock.html" class="nav-link sidebar-link sidebar-page" aria-label="锁"><!---->锁<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/reentrantLock.html" class="nav-link sidebar-link sidebar-page" aria-label="重入锁ReentrantLock"><!---->重入锁ReentrantLock<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ReentrantReadWriteLock.html" class="nav-link sidebar-link sidebar-page" aria-label="读写锁ReentrantReadWriteLock"><!---->读写锁ReentrantReadWriteLock<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/condition.html" class="nav-link sidebar-link sidebar-page" aria-label="线程协作类Condition"><!---->线程协作类Condition<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/LockSupport.html" class="nav-link sidebar-link sidebar-page" aria-label="线程阻塞唤醒类LockSupport"><!---->线程阻塞唤醒类LockSupport<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/map.html" class="nav-link sidebar-link sidebar-page" aria-label="并发集合容器"><!---->并发集合容器<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ConcurrentHashMap.html" class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentHashMap"><!---->ConcurrentHashMap<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ConcurrentLinkedQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentLinkedQueue"><!---->ConcurrentLinkedQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CopyOnWriteArrayList.html" class="nav-link sidebar-link sidebar-page" aria-label="CopyOnWriteArrayList"><!---->CopyOnWriteArrayList<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ThreadLocal.html" class="nav-link sidebar-link sidebar-page" aria-label="ThreadLocal"><!---->ThreadLocal<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/thread/BlockingQueue.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="BlockingQueue"><!---->BlockingQueue<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/BlockingQueue.html#基本操作" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="基本操作"><!---->基本操作<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/BlockingQueue.html#常用的blockingqueue" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="常用的BlockingQueue"><!---->常用的BlockingQueue<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/BlockingQueue.html#arrayblockingqueue" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="ArrayBlockingQueue"><!---->ArrayBlockingQueue<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/BlockingQueue.html#linkedblockingqueue" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="LinkedBlockingQueue"><!---->LinkedBlockingQueue<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/BlockingQueue.html#priorityblockingqueue" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="PriorityBlockingQueue"><!---->PriorityBlockingQueue<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/BlockingQueue.html#synchronousqueue" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="SynchronousQueue"><!---->SynchronousQueue<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/BlockingQueue.html#linkedtransferqueue" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="LinkedTransferQueue"><!---->LinkedTransferQueue<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/BlockingQueue.html#linkedblockingdeque" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="LinkedBlockingDeque"><!---->LinkedBlockingDeque<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/BlockingQueue.html#delayqueue" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="DelayQueue"><!---->DelayQueue<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li></ul><!--]--></li><li><!--[--><a href="/thread/pool.html" class="nav-link sidebar-link sidebar-page" aria-label="线程池"><!---->线程池<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ScheduledThreadPoolExecutor.html" class="nav-link sidebar-link sidebar-page" aria-label="计划任务"><!---->计划任务<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/atomic.html" class="nav-link sidebar-link sidebar-page" aria-label="原子操作类"><!---->原子操作类<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CountDownLatch.html" class="nav-link sidebar-link sidebar-page" aria-label="通信工具类CountDownLatch"><!---->通信工具类CountDownLatch<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/fork-join.html" class="nav-link sidebar-link sidebar-page" aria-label="Fork/Join框架"><!---->Fork/Join框架<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/shengchanzhe-xiaofeizhe.html" class="nav-link sidebar-link sidebar-page" aria-label="生产者-消费者模式"><!---->生产者-消费者模式<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->吊打Java并发面试官之BlockingQueue</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月23日</span><meta property="datePublished" content="2022-03-23T12:08:58.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 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14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 12 分钟</span><meta property="timeRequired" content="PT12M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/BlockingQueue.html#基本操作" class="router-link-active router-link-exact-active toc-link level2">基本操作</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/BlockingQueue.html#常用的blockingqueue" class="router-link-active router-link-exact-active toc-link level2">常用的BlockingQueue</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/BlockingQueue.html#arrayblockingqueue" class="router-link-active router-link-exact-active toc-link level3">ArrayBlockingQueue</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/BlockingQueue.html#linkedblockingqueue" class="router-link-active router-link-exact-active toc-link level3">LinkedBlockingQueue</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/BlockingQueue.html#priorityblockingqueue" class="router-link-active router-link-exact-active toc-link level3">PriorityBlockingQueue</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/BlockingQueue.html#synchronousqueue" class="router-link-active router-link-exact-active toc-link level3">SynchronousQueue</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/BlockingQueue.html#linkedtransferqueue" class="router-link-active router-link-exact-active toc-link level3">LinkedTransferQueue</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/BlockingQueue.html#linkedblockingdeque" class="router-link-active router-link-exact-active toc-link level3">LinkedBlockingDeque</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/BlockingQueue.html#delayqueue" class="router-link-active router-link-exact-active toc-link level3">DelayQueue</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><p>最常用的&quot;<strong>生产者-消费者</strong>&quot;问题中，队列通常被视作线程间操作的数据容器，这样，可以对各个模块的业务功能进行解耦，生产者将“生产”出来的数据放置在数据容器中，而消费者仅仅只需要在“数据容器”中进行获取数据即可，这样生产者线程和消费者线程就能够进行解耦，只专注于自己的业务功能即可。</p><p>阻塞队列（BlockingQueue）被广泛使用在“生产者-消费者”问题中，其原因是BlockingQueue提供了可阻塞的插入和移除的方法。<strong>当队列容器已满，生产者线程会被阻塞，直到队列未满；当队列容器为空时，消费者线程会被阻塞，直至队列非空时为止</strong>。</p><h2 id="基本操作" tabindex="-1"><a class="header-anchor" href="#基本操作" aria-hidden="true">#</a> 基本操作</h2><p>BlockingQueue基本操作总结如下（此图来源于JAVA API文档）：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/BlockingQueue-01.png" alt=""></p><p>BlockingQueue继承于Queue接口，因此，对数据元素的基本操作有：</p><p>1）插入元素</p><ol><li>add(E e) ：往队列插入数据，当队列满时，插入元素时会抛出IllegalStateException异常；</li><li>offer(E e)：当往队列插入数据时，插入成功返回<code>true</code>，否则则返回<code>false</code>。当队列满时不会抛出异常；</li></ol><p>2）删除元素</p><ol><li>remove(Object o)：从队列中删除数据，成功则返回<code>true</code>，否则为<code>false</code></li><li>poll：删除数据，当队列为空时，返回null；</li></ol><p>3）查看元素</p><ol><li>element：获取队头元素，如果队列为空时则抛出NoSuchElementException异常；</li><li>peek：获取队头元素，如果队列为空则抛出NoSuchElementException异常</li></ol><p>BlockingQueue具有的特殊操作：</p><p>1）插入数据：</p><ol><li>put：当阻塞队列容量已经满时，往阻塞队列插入数据的线程会被阻塞，直至阻塞队列已经有空余的容量可供使用；</li><li><code>offer(E e, long timeout, TimeUnit unit)</code>：若阻塞队列已经满时，同样会阻塞插入数据的线程，直至阻塞队列已经有空余的地方，与put方法不同的是，该方法会有一个超时时间，若超过当前给定的超时时间，插入数据的线程会退出；</li></ol><p>2）删除数据</p><ol><li><code>take()</code>：当阻塞队列为空时，获取队头数据的线程会被阻塞；</li><li><code>poll(long timeout, TimeUnit unit)</code>：当阻塞队列为空时，获取数据的线程会被阻塞，另外，如果被阻塞的线程超过了给定的时长，该线程会退出</li></ol><h2 id="常用的blockingqueue" tabindex="-1"><a class="header-anchor" href="#常用的blockingqueue" aria-hidden="true">#</a> 常用的BlockingQueue</h2><p>实现BlockingQueue接口的有<code>ArrayBlockingQueue, DelayQueue, LinkedBlockingDeque, LinkedBlockingQueue, LinkedTransferQueue, PriorityBlockingQueue, SynchronousQueue</code>，而这几种常见的阻塞队列也是在实际编程中会常用的，下面对这几种常见的阻塞队列进行说明：</p><h3 id="arrayblockingqueue" tabindex="-1"><a class="header-anchor" href="#arrayblockingqueue" aria-hidden="true">#</a> ArrayBlockingQueue</h3><p><strong>ArrayBlockingQueue</strong>是由数组实现的有界阻塞队列。该队列命令元素FIFO（先进先出）。因此，对头元素时队列中存在时间最长的数据元素，而对尾数据则是当前队列最新的数据元素。ArrayBlockingQueue可作为“有界数据缓冲区”，生产者插入数据到队列容器中，并由消费者提取。ArrayBlockingQueue一旦创建，容量不能改变。</p><p>当队列容量满时，尝试将元素放入队列将导致操作阻塞;尝试从一个空队列中取一个元素也会同样阻塞。</p><p>ArrayBlockingQueue默认情况下不能保证线程访问队列的公平性，所谓公平性是指严格按照线程等待的绝对时间顺序，即最先等待的线程能够最先访问到ArrayBlockingQueue。而非公平性则是指访问ArrayBlockingQueue的顺序不是遵守严格的时间顺序，有可能存在，一旦ArrayBlockingQueue可以被访问时，长时间阻塞的线程依然无法访问到ArrayBlockingQueue。<strong>如果保证公平性，通常会降低吞吐量</strong>。如果需要获得公平性的ArrayBlockingQueue，可采用如下代码：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">private</span> <span class="token keyword">static</span> <span class="token class-name">ArrayBlockingQueue</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">Integer</span><span class="token punctuation">&gt;</span></span> blockingQueue <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">ArrayBlockingQueue</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">Integer</span><span class="token punctuation">&gt;</span></span><span class="token punctuation">(</span><span class="token number">10</span><span class="token punctuation">,</span><span class="token boolean">true</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>ArrayBlockingQueue的主要属性如下:</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token doc-comment comment">/** The queued items */</span>
 <span class="token keyword">final</span> <span class="token class-name">Object</span><span class="token punctuation">[</span><span class="token punctuation">]</span> items<span class="token punctuation">;</span>
 
@@ -230,6 +230,6 @@
     <span class="token keyword">return</span> x<span class="token punctuation">;</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>take方法的主要逻辑请见于注释，也很容易理解。</p><p>** ArrayBlockingQueue与LinkedBlockingQueue的比较**</p><p><strong>相同点</strong>：ArrayBlockingQueue和LinkedBlockingQueue都是通过condition通知机制来实现可阻塞式插入和删除元素，并满足线程安全的特性；</p><p><strong>不同点</strong>：</p><ol><li>ArrayBlockingQueue底层是采用的数组进行实现，而LinkedBlockingQueue则是采用链表数据结构；</li><li>ArrayBlockingQueue插入和删除数据，只采用了一个lock，而LinkedBlockingQueue则是在插入和删除分别采用了<code>putLock</code>和<code>takeLock</code>，这样可以降低线程由于线程无法获取到lock而进入WAITING状态的可能性，从而提高了线程并发执行的效率。</li></ol><h3 id="priorityblockingqueue" tabindex="-1"><a class="header-anchor" href="#priorityblockingqueue" aria-hidden="true">#</a> PriorityBlockingQueue</h3><p>PriorityBlockingQueue是一个支持优先级的无界阻塞队列。默认情况下元素采用自然顺序进行排序，也可以通过自定义类实现compareTo()方法来指定元素排序规则，或者初始化时通过构造器参数Comparator来指定排序规则。</p><h3 id="synchronousqueue" tabindex="-1"><a class="header-anchor" href="#synchronousqueue" aria-hidden="true">#</a> SynchronousQueue</h3><p>SynchronousQueue每个插入操作必须等待另一个线程进行相应的删除操作，因此，SynchronousQueue实际上没有存储任何数据元素，因为只有线程在删除数据时，其他线程才能插入数据，同样的，如果当前有线程在插入数据时，线程才能删除数据。SynchronousQueue也可以通过构造器参数来为其指定公平性。</p><h3 id="linkedtransferqueue" tabindex="-1"><a class="header-anchor" href="#linkedtransferqueue" aria-hidden="true">#</a> LinkedTransferQueue</h3><p>LinkedTransferQueue是一个由链表数据结构构成的无界阻塞队列，由于该队列实现了TransferQueue接口，与其他阻塞队列相比主要有以下不同的方法：</p><p><strong>transfer(E e)</strong> 如果当前有线程（消费者）正在调用take()方法或者可延时的poll()方法进行消费数据时，生产者线程可以调用transfer方法将数据传递给消费者线程。如果当前没有消费者线程的话，生产者线程就会将数据插入到队尾，直到有消费者能够进行消费才能退出；</p><p><strong>tryTransfer(E e)</strong> tryTransfer方法如果当前有消费者线程（调用take方法或者具有超时特性的poll方法）正在消费数据的话，该方法可以将数据立即传送给消费者线程，如果当前没有消费者线程消费数据的话，就立即返回<code>false</code>。因此，与transfer方法相比，transfer方法是必须等到有消费者线程消费数据时，生产者线程才能够返回。而tryTransfer方法能够立即返回结果退出。</p><p><code>tryTransfer(E e,long timeout,imeUnit unit)</code> 与transfer基本功能一样，只是增加了超时特性，如果数据才规定的超时时间内没有消费者进行消费的话，就返回<code>false</code>。</p><h3 id="linkedblockingdeque" tabindex="-1"><a class="header-anchor" href="#linkedblockingdeque" aria-hidden="true">#</a> LinkedBlockingDeque</h3><p>LinkedBlockingDeque是基于链表数据结构的有界阻塞双端队列，如果在创建对象时为指定大小时，其默认大小为Integer.MAX_VALUE。与LinkedBlockingQueue相比，主要的不同点在于，LinkedBlockingDeque具有双端队列的特性。LinkedBlockingDeque基本操作如下图所示（来源于java文档）</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/BlockingQueue-02.png" alt=""></p><p>如上图所示，LinkedBlockingDeque的基本操作可以分为四种类型：</p><ol><li>特殊情况，抛出异常；</li><li>特殊情况，返回特殊值如null或者false；</li><li>当线程不满足操作条件时，线程会被阻塞直至条件满足；</li><li>操作具有超时特性。</li></ol><p>另外，LinkedBlockingDeque实现了BlockingDueue接口而LinkedBlockingQueue实现的是BlockingQueue，这两个接口的主要区别如下图所示（来源于java文档）：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/BlockingQueue-03.png" alt="BlockingQueue和BlockingDeque的区别"></p><p>从上图可以看出，两个接口的功能是可以等价使用的，比如BlockingQueue的add方法和BlockingDeque的addLast方法的功能是一样的。</p><h3 id="delayqueue" tabindex="-1"><a class="header-anchor" href="#delayqueue" aria-hidden="true">#</a> DelayQueue</h3><p>DelayQueue是一个存放实现Delayed接口的数据的无界阻塞队列，只有当数据对象的延时时间达到时才能插入到队列进行存储。如果当前所有的数据都还没有达到创建时所指定的延时期，则队列没有队头，并且线程通过poll等方法获取数据元素则返回null。所谓数据延时期满时，则是通过Delayed接口的<code>getDelay(TimeUnit.NANOSECONDS)</code>来进行判定，如果该方法返回的是小于等于0则说明该数据元素的延时期已满。</p><hr><blockquote><p>编辑：沉默王二，内容大部分来源以下三个开源仓库：</p><ul><li><a href="http://concurrent.redspider.group/" target="_blank" rel="noopener noreferrer">深入浅出 Java 多线程<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://github.com/CL0610/Java-concurrency" target="_blank" rel="noopener noreferrer">并发编程知识总结<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://github.com/CoderLeixiaoshuai/java-eight-part" target="_blank" rel="noopener noreferrer">Java八股文<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul></blockquote><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png"></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/thread/BlockingQueue.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 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clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">2.11 并发编程</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/thread/wangzhe-thread.html" class="nav-link sidebar-link sidebar-page" aria-label="创建Java线程的3种方式"><!---->创建Java线程的3种方式<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/thread-state-and-method.html" class="nav-link sidebar-link sidebar-page" aria-label="线程的6种状态及切换"><!---->线程的6种状态及切换<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a 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href="/thread/ConcurrentHashMap.html#cas关键操作" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="CAS关键操作"><!---->CAS关键操作<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ConcurrentHashMap.html#_1-tabat" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="1. tabAt"><!---->1. tabAt<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ConcurrentHashMap.html#_2-castabat" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="2. casTabAt"><!---->2. casTabAt<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ConcurrentHashMap.html#_3-settabat" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="3. setTabAt"><!---->3. 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class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="put方法"><!---->put方法<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ConcurrentHashMap.html#get方法" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="get方法"><!---->get方法<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ConcurrentHashMap.html#transfer方法" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="transfer方法"><!---->transfer方法<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ConcurrentHashMap.html#与size相关的一些方法" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="与size相关的一些方法"><!---->与size相关的一些方法<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ConcurrentHashMap.html#总结" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="总结"><!---->总结<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/thread/ConcurrentLinkedQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentLinkedQueue"><!---->ConcurrentLinkedQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CopyOnWriteArrayList.html" class="nav-link sidebar-link sidebar-page" aria-label="CopyOnWriteArrayList"><!---->CopyOnWriteArrayList<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ThreadLocal.html" class="nav-link sidebar-link sidebar-page" aria-label="ThreadLocal"><!---->ThreadLocal<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/BlockingQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="BlockingQueue"><!---->BlockingQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/pool.html" class="nav-link sidebar-link sidebar-page" aria-label="线程池"><!---->线程池<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ScheduledThreadPoolExecutor.html" class="nav-link sidebar-link sidebar-page" aria-label="计划任务"><!---->计划任务<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/atomic.html" class="nav-link sidebar-link sidebar-page" aria-label="原子操作类"><!---->原子操作类<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CountDownLatch.html" class="nav-link sidebar-link sidebar-page" aria-label="通信工具类CountDownLatch"><!---->通信工具类CountDownLatch<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/fork-join.html" class="nav-link sidebar-link sidebar-page" aria-label="Fork/Join框架"><!---->Fork/Join框架<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/shengchanzhe-xiaofeizhe.html" class="nav-link sidebar-link sidebar-page" aria-label="生产者-消费者模式"><!---->生产者-消费者模式<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow 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19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 27 分钟</span><meta property="timeRequired" content="PT27M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ConcurrentHashMap.html#关键属性及类" class="router-link-active router-link-exact-active toc-link level2">关键属性及类</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ConcurrentHashMap.html#concurrenthashmap的关键属性" class="router-link-active router-link-exact-active toc-link level3">ConcurrentHashMap的关键属性</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ConcurrentHashMap.html#concurrenthashmap中关键内部类" class="router-link-active router-link-exact-active toc-link level3">ConcurrentHashMap中关键内部类</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ConcurrentHashMap.html#cas关键操作" class="router-link-active router-link-exact-active toc-link level2">CAS关键操作</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ConcurrentHashMap.html#_1-tabat" class="router-link-active router-link-exact-active toc-link level3">1. tabAt</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ConcurrentHashMap.html#_2-castabat" class="router-link-active router-link-exact-active toc-link level3">2. casTabAt</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ConcurrentHashMap.html#_3-settabat" class="router-link-active router-link-exact-active toc-link level3">3. setTabAt</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ConcurrentHashMap.html#重点方法讲解" class="router-link-active router-link-exact-active toc-link level2">重点方法讲解</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ConcurrentHashMap.html#实例构造器方法" class="router-link-active router-link-exact-active toc-link level3">实例构造器方法</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ConcurrentHashMap.html#inittable方法" class="router-link-active router-link-exact-active toc-link level3">initTable方法</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ConcurrentHashMap.html#put方法" class="router-link-active router-link-exact-active toc-link level3">put方法</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ConcurrentHashMap.html#get方法" class="router-link-active router-link-exact-active toc-link level3">get方法</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ConcurrentHashMap.html#transfer方法" class="router-link-active router-link-exact-active toc-link level3">transfer方法</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ConcurrentHashMap.html#与size相关的一些方法" class="router-link-active router-link-exact-active toc-link level3">与size相关的一些方法</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ConcurrentHashMap.html#总结" class="router-link-active router-link-exact-active toc-link level2">总结</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><p>在使用HashMap时，在多线程情况下扩容会出现CPU接近100%的情况，因为hashmap并不是线程安全的，通常我们可以使用在java体系中古老的hashtable类，该类基本上所有的方法都采用synchronized进行线程安全的控制，可想而知，在高并发的情况下，每次只有一个线程能够获取对象监视器锁，这样的并发性能的确不令人满意。</p><p>另外一种方式通过Collections的<code>Map&lt;K,V&gt; synchronizedMap(Map&lt;K,V&gt; m)</code>将hashmap包装成一个线程安全的map。比如SynchronzedMap的put方法源码为：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code>	<span class="token keyword">public</span> <span class="token class-name">V</span> <span class="token function">put</span><span class="token punctuation">(</span><span class="token class-name">K</span> key<span class="token punctuation">,</span> <span class="token class-name">V</span> value<span class="token punctuation">)</span> <span class="token punctuation">{</span>
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clickable"><!----><span class="title">2.1 Java概述</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.2 Java基础语法</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.3 面向对象编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.4 字符串&amp;数组</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.5 集合框架（容器）</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.6 IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">2.11 并发编程</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/thread/wangzhe-thread.html" class="nav-link sidebar-link sidebar-page" aria-label="创建Java线程的3种方式"><!---->创建Java线程的3种方式<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/thread-state-and-method.html" class="nav-link sidebar-link sidebar-page" aria-label="线程的6种状态及切换"><!---->线程的6种状态及切换<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/thread-group-and-thread-priority.html" class="nav-link sidebar-link sidebar-page" aria-label="线程组和线程优先级"><!---->线程组和线程优先级<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/why-need-thread.html" class="nav-link sidebar-link sidebar-page" aria-label="进程与线程的区别"><!---->进程与线程的区别<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/thread-bring-some-problem.html" class="nav-link sidebar-link sidebar-page" aria-label="并发编程带来了哪些问题"><!---->并发编程带来了哪些问题<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/jmm.html" class="nav-link sidebar-link sidebar-page" aria-label="Java内存模型"><!---->Java内存模型<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/volatile.html" class="nav-link sidebar-link sidebar-page" aria-label="volatile"><!---->volatile<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/synchronized.html" class="nav-link sidebar-link sidebar-page" aria-label="synchronized"><!---->synchronized<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/cas.html" class="nav-link sidebar-link sidebar-page" aria-label="CAS的原理"><!---->CAS的原理<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/aqs.html" class="nav-link sidebar-link sidebar-page" aria-label="AQS详解"><!---->AQS详解<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/lock.html" class="nav-link sidebar-link sidebar-page" aria-label="锁"><!---->锁<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/reentrantLock.html" class="nav-link sidebar-link sidebar-page" aria-label="重入锁ReentrantLock"><!---->重入锁ReentrantLock<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ReentrantReadWriteLock.html" class="nav-link sidebar-link sidebar-page" aria-label="读写锁ReentrantReadWriteLock"><!---->读写锁ReentrantReadWriteLock<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/condition.html" class="nav-link sidebar-link sidebar-page" aria-label="线程协作类Condition"><!---->线程协作类Condition<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/LockSupport.html" class="nav-link sidebar-link sidebar-page" aria-label="线程阻塞唤醒类LockSupport"><!---->线程阻塞唤醒类LockSupport<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/map.html" class="nav-link sidebar-link sidebar-page" aria-label="并发集合容器"><!---->并发集合容器<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/thread/ConcurrentHashMap.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="ConcurrentHashMap"><!---->ConcurrentHashMap<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ConcurrentHashMap.html#关键属性及类" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="关键属性及类"><!---->关键属性及类<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ConcurrentHashMap.html#concurrenthashmap的关键属性" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="ConcurrentHashMap的关键属性"><!---->ConcurrentHashMap的关键属性<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ConcurrentHashMap.html#concurrenthashmap中关键内部类" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="ConcurrentHashMap中关键内部类"><!---->ConcurrentHashMap中关键内部类<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ConcurrentHashMap.html#cas关键操作" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="CAS关键操作"><!---->CAS关键操作<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ConcurrentHashMap.html#_1-tabat" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="1. tabAt"><!---->1. tabAt<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ConcurrentHashMap.html#_2-castabat" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="2. casTabAt"><!---->2. casTabAt<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ConcurrentHashMap.html#_3-settabat" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="3. setTabAt"><!---->3. setTabAt<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ConcurrentHashMap.html#重点方法讲解" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="重点方法讲解"><!---->重点方法讲解<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ConcurrentHashMap.html#实例构造器方法" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="实例构造器方法"><!---->实例构造器方法<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ConcurrentHashMap.html#inittable方法" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="initTable方法"><!---->initTable方法<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ConcurrentHashMap.html#put方法" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="put方法"><!---->put方法<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ConcurrentHashMap.html#get方法" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="get方法"><!---->get方法<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ConcurrentHashMap.html#transfer方法" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="transfer方法"><!---->transfer方法<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ConcurrentHashMap.html#与size相关的一些方法" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="与size相关的一些方法"><!---->与size相关的一些方法<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ConcurrentHashMap.html#总结" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="总结"><!---->总结<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/thread/ConcurrentLinkedQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentLinkedQueue"><!---->ConcurrentLinkedQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CopyOnWriteArrayList.html" class="nav-link sidebar-link sidebar-page" aria-label="CopyOnWriteArrayList"><!---->CopyOnWriteArrayList<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ThreadLocal.html" class="nav-link sidebar-link sidebar-page" aria-label="ThreadLocal"><!---->ThreadLocal<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/BlockingQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="BlockingQueue"><!---->BlockingQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/pool.html" class="nav-link sidebar-link sidebar-page" aria-label="线程池"><!---->线程池<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ScheduledThreadPoolExecutor.html" class="nav-link sidebar-link sidebar-page" aria-label="计划任务"><!---->计划任务<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/atomic.html" class="nav-link sidebar-link sidebar-page" aria-label="原子操作类"><!---->原子操作类<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CountDownLatch.html" class="nav-link sidebar-link sidebar-page" aria-label="通信工具类CountDownLatch"><!---->通信工具类CountDownLatch<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/fork-join.html" class="nav-link sidebar-link sidebar-page" aria-label="Fork/Join框架"><!---->Fork/Join框架<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/shengchanzhe-xiaofeizhe.html" class="nav-link sidebar-link sidebar-page" aria-label="生产者-消费者模式"><!---->生产者-消费者模式<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->吊打Java并发面试官之ConcurrentHashMap</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月23日</span><meta property="datePublished" content="2022-03-23T12:08:58.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 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142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 27 分钟</span><meta property="timeRequired" content="PT27M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ConcurrentHashMap.html#关键属性及类" class="router-link-active router-link-exact-active toc-link level2">关键属性及类</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ConcurrentHashMap.html#concurrenthashmap的关键属性" class="router-link-active router-link-exact-active toc-link level3">ConcurrentHashMap的关键属性</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ConcurrentHashMap.html#concurrenthashmap中关键内部类" class="router-link-active router-link-exact-active toc-link level3">ConcurrentHashMap中关键内部类</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ConcurrentHashMap.html#cas关键操作" class="router-link-active router-link-exact-active toc-link level2">CAS关键操作</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ConcurrentHashMap.html#_1-tabat" class="router-link-active router-link-exact-active toc-link level3">1. tabAt</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ConcurrentHashMap.html#_2-castabat" class="router-link-active router-link-exact-active toc-link level3">2. casTabAt</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ConcurrentHashMap.html#_3-settabat" class="router-link-active router-link-exact-active toc-link level3">3. setTabAt</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ConcurrentHashMap.html#重点方法讲解" class="router-link-active router-link-exact-active toc-link level2">重点方法讲解</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ConcurrentHashMap.html#实例构造器方法" class="router-link-active router-link-exact-active toc-link level3">实例构造器方法</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ConcurrentHashMap.html#inittable方法" class="router-link-active router-link-exact-active toc-link level3">initTable方法</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ConcurrentHashMap.html#put方法" class="router-link-active router-link-exact-active toc-link level3">put方法</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ConcurrentHashMap.html#get方法" class="router-link-active router-link-exact-active toc-link level3">get方法</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ConcurrentHashMap.html#transfer方法" class="router-link-active router-link-exact-active toc-link level3">transfer方法</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ConcurrentHashMap.html#与size相关的一些方法" class="router-link-active router-link-exact-active toc-link level3">与size相关的一些方法</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ConcurrentHashMap.html#总结" class="router-link-active router-link-exact-active toc-link level2">总结</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><p>在使用HashMap时，在多线程情况下扩容会出现CPU接近100%的情况，因为hashmap并不是线程安全的，通常我们可以使用在java体系中古老的hashtable类，该类基本上所有的方法都采用synchronized进行线程安全的控制，可想而知，在高并发的情况下，每次只有一个线程能够获取对象监视器锁，这样的并发性能的确不令人满意。</p><p>另外一种方式通过Collections的<code>Map&lt;K,V&gt; synchronizedMap(Map&lt;K,V&gt; m)</code>将hashmap包装成一个线程安全的map。比如SynchronzedMap的put方法源码为：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code>	<span class="token keyword">public</span> <span class="token class-name">V</span> <span class="token function">put</span><span class="token punctuation">(</span><span class="token class-name">K</span> key<span class="token punctuation">,</span> <span class="token class-name">V</span> value<span class="token punctuation">)</span> <span class="token punctuation">{</span>
 	    <span class="token keyword">synchronized</span> <span class="token punctuation">(</span>mutex<span class="token punctuation">)</span> <span class="token punctuation">{</span><span class="token keyword">return</span> m<span class="token punctuation">.</span><span class="token function">put</span><span class="token punctuation">(</span>key<span class="token punctuation">,</span> value<span class="token punctuation">)</span><span class="token punctuation">;</span><span class="token punctuation">}</span>
 	<span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>实际上SynchronizedMap实现依然是采用synchronized独占式锁进行线程安全的并发控制的。同样，这种方案的性能也是令人不太满意的。针对这种境况，Doug Lea大师不遗余力的为我们创造了一些线程安全的并发容器，让每一个java开发人员倍感幸福。相对于hashmap来说，ConcurrentHashMap就是线程安全的map，其中<strong>利用了锁分段的思想提高了并发度</strong>。</p><p>ConcurrentHashMap在JDK1.6的版本网上资料很多，有兴趣的可以去看看。 JDK 1.6版本关键要素：</p><ol><li>segment继承了ReentrantLock充当锁的角色，为每一个segment提供了线程安全的保障；</li><li>segment维护了哈希散列表的若干个桶，每个桶由HashEntry构成的链表。</li></ol><p>而到了JDK 1.8的ConcurrentHashMap就有了很大的变化，光是代码量就足足增加了很多。1.8版本舍弃了segment，并且大量使用了synchronized，以及CAS无锁操作以保证ConcurrentHashMap操作的线程安全性。</p><p>至于为什么不用ReentrantLock而是Synchronzied呢？实际上，synchronzied做了很多的优化，包括偏向锁，轻量级锁，重量级锁，可以依次向上升级锁状态，但不能降级，因此，使用synchronized相较于ReentrantLock的性能会持平甚至在某些情况更优，具体的性能测试可以去网上查阅一些资料。另外，底层数据结构改变为采用数组+链表+红黑树的数据形式。</p><h2 id="关键属性及类" tabindex="-1"><a class="header-anchor" href="#关键属性及类" aria-hidden="true">#</a> 关键属性及类</h2><p>在了解ConcurrentHashMap的具体方法实现前，我们需要系统的来看一下几个关键的地方。</p><h3 id="concurrenthashmap的关键属性" tabindex="-1"><a class="header-anchor" href="#concurrenthashmap的关键属性" aria-hidden="true">#</a> <strong>ConcurrentHashMap的关键属性</strong></h3><ol><li><strong>table</strong><code>volatile Node&lt;K,V&gt;[] table</code>:</li></ol><p>装载Node的数组，作为ConcurrentHashMap的数据容器，采用懒加载的方式，直到第一次插入数据的时候才会进行初始化操作，数组的大小总是为2的幂次方。</p><ol start="2"><li><strong>nextTable</strong><code>volatile Node&lt;K,V&gt;[] nextTable;</code></li></ol><p>扩容时使用，平时为null，只有在扩容的时候才为非null</p><ol start="3"><li><strong>sizeCtl</strong><code>volatile int sizeCtl;</code></li></ol><p>该属性用来控制table数组的大小，根据是否初始化和是否正在扩容有几种情况：</p><ul><li><strong>当值为负数时：</strong> 如果为-1表示正在初始化，如果为-N则表示当前正有N-1个线程进行扩容操作；</li><li><strong>当值为正数时：</strong> 如果当前数组为null的话表示table在初始化过程中，sizeCtl表示为需要新建数组的长度；</li><li>若已经初始化了，表示当前数据容器（table数组）可用容量也可以理解成临界值（插入节点数超过了该临界值就需要扩容），具体指为数组的长度n 乘以 加载因子loadFactor；</li><li>当值为0时，即数组长度为默认初始值。</li></ul><ol start="4"><li><code>sun.misc.Unsafe U</code></li></ol><p>在ConcurrentHashMapde的实现中可以看到大量的U.compareAndSwapXXXX的方法去修改ConcurrentHashMap的一些属性。</p><p>这些方法实际上是利用了CAS算法保证了线程安全性，这是一种乐观策略，假设每一次操作都不会产生冲突，当且仅当冲突发生的时候再去尝试。</p><p>而CAS操作依赖于现代处理器指令集，通过底层<strong>CMPXCHG</strong>指令实现。CAS(V,O,N)核心思想为：<strong>若当前变量实际值V与期望的旧值O相同，则表明该变量没被其他线程进行修改，因此可以安全的将新值N赋值给变量；若当前变量实际值V与期望的旧值O不相同，则表明该变量已经被其他线程做了处理，此时将新值N赋给变量操作就是不安全的，在进行重试</strong>。</p><p>而在大量的同步组件和并发容器的实现中使用CAS是通过<code>sun.misc.Unsafe</code>类实现的，该类提供了一些可以直接操控内存和线程的底层操作，可以理解为java中的“指针”。该成员变量的获取是在静态代码块中：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">static</span> <span class="token punctuation">{</span>
@@ -544,6 +544,6 @@
     <span class="token punctuation">}</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h2 id="总结" tabindex="-1"><a class="header-anchor" href="#总结" aria-hidden="true">#</a> 总结</h2><p>JDK6,7中的ConcurrentHashmap主要使用Segment来实现减小锁粒度，分割成若干个Segment，在put的时候需要锁住Segment，get时候不加锁，使用volatile来保证可见性，当要统计全局时（比如size），首先会尝试多次计算modcount来确定，这几次尝试中，是否有其他线程进行了修改操作，如果没有，则直接返回size。如果有，则需要依次锁住所有的Segment来计算。</p><p>1.8之前put定位节点时要先定位到具体的segment，然后再在segment中定位到具体的桶。而在1.8的时候摒弃了segment臃肿的设计，直接针对的是Node[] tale数组中的每一个桶，进一步减小了锁粒度。并且防止拉链过长导致性能下降，当链表长度大于8的时候采用红黑树的设计。</p><p>主要设计上的变化有以下几点:</p><ol><li>不采用segment而采用node，锁住node来实现减小锁粒度。</li><li>设计了MOVED状态 当resize的中过程中 线程2还在put数据，线程2会帮助resize。</li><li>使用3个CAS操作来确保node的一些操作的原子性，这种方式代替了锁。</li><li>sizeCtl的不同值来代表不同含义，起到了控制的作用。</li><li>采用synchronized而不是ReentrantLock</li></ol><p>更多关于1.7版本与1.8版本的ConcurrentHashMap的实现对比，可以参考<a href="http://www.jianshu.com/p/e694f1e868ec" target="_blank" rel="noopener noreferrer">这篇文章<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>。</p><hr><blockquote><p>编辑：沉默王二，内容大部分来源以下三个开源仓库：</p><ul><li><a href="http://concurrent.redspider.group/" target="_blank" rel="noopener noreferrer">深入浅出 Java 多线程<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://github.com/CL0610/Java-concurrency" target="_blank" rel="noopener noreferrer">并发编程知识总结<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://github.com/CoderLeixiaoshuai/java-eight-part" target="_blank" rel="noopener noreferrer">Java八股文<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul></blockquote><img 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nav-link sidebar-link heading" aria-label="HOPS的设计"><!---->HOPS的设计<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/thread/CopyOnWriteArrayList.html" class="nav-link sidebar-link sidebar-page" aria-label="CopyOnWriteArrayList"><!---->CopyOnWriteArrayList<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ThreadLocal.html" class="nav-link sidebar-link sidebar-page" aria-label="ThreadLocal"><!---->ThreadLocal<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/BlockingQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="BlockingQueue"><!---->BlockingQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/pool.html" class="nav-link sidebar-link sidebar-page" aria-label="线程池"><!---->线程池<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ScheduledThreadPoolExecutor.html" 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class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section 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class="router-link-active router-link-exact-active toc-link level3">单线程执行角度分析：</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ConcurrentLinkedQueue.html#多线程执行角度分析" class="router-link-active router-link-exact-active toc-link level3">多线程执行角度分析</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ConcurrentLinkedQueue.html#poll方法" class="router-link-active router-link-exact-active toc-link level2">poll方法</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ConcurrentLinkedQueue.html#定位删除的队头节点" class="router-link-active router-link-exact-active toc-link level3">定位删除的队头节点</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ConcurrentLinkedQueue.html#多线程执行情况分析" class="router-link-active router-link-exact-active toc-link level3">多线程执行情况分析：</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ConcurrentLinkedQueue.html#offer方法中部分线程offer部分线程poll" class="router-link-active router-link-exact-active toc-link level2">offer方法中部分线程offer部分线程poll</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ConcurrentLinkedQueue.html#hops的设计" class="router-link-active router-link-exact-active toc-link level2">HOPS的设计</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><p>队列是我们常用的一种数据结构，为了解决线程安全的问题，Doug Lea大师为我们准备了ConcurrentLinkedQueue这个线程安全的队列。从类名就可以看的出来实现队列的数据结构是链式。</p><h2 id="node" tabindex="-1"><a class="header-anchor" href="#node" aria-hidden="true">#</a> Node</h2><p>要想先学习ConcurrentLinkedQueue自然而然得先从它的节点类看起，明白它的底层数据结构。Node类的源码为：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">private</span> <span class="token keyword">static</span> <span class="token keyword">class</span> <span class="token class-name">Node</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">E</span><span class="token punctuation">&gt;</span></span> <span class="token punctuation">{</span>
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clickable"><!----><span class="title">2.1 Java概述</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.2 Java基础语法</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.3 面向对象编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.4 字符串&amp;数组</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.5 集合框架（容器）</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.6 IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">2.11 并发编程</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/thread/wangzhe-thread.html" class="nav-link sidebar-link sidebar-page" aria-label="创建Java线程的3种方式"><!---->创建Java线程的3种方式<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/thread-state-and-method.html" class="nav-link sidebar-link sidebar-page" aria-label="线程的6种状态及切换"><!---->线程的6种状态及切换<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/thread-group-and-thread-priority.html" class="nav-link sidebar-link sidebar-page" aria-label="线程组和线程优先级"><!---->线程组和线程优先级<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/why-need-thread.html" class="nav-link sidebar-link sidebar-page" aria-label="进程与线程的区别"><!---->进程与线程的区别<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/thread-bring-some-problem.html" class="nav-link sidebar-link sidebar-page" aria-label="并发编程带来了哪些问题"><!---->并发编程带来了哪些问题<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/jmm.html" class="nav-link sidebar-link sidebar-page" aria-label="Java内存模型"><!---->Java内存模型<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/volatile.html" class="nav-link sidebar-link sidebar-page" aria-label="volatile"><!---->volatile<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/synchronized.html" class="nav-link sidebar-link sidebar-page" aria-label="synchronized"><!---->synchronized<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/cas.html" class="nav-link sidebar-link sidebar-page" aria-label="CAS的原理"><!---->CAS的原理<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/aqs.html" class="nav-link sidebar-link sidebar-page" aria-label="AQS详解"><!---->AQS详解<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/lock.html" class="nav-link sidebar-link sidebar-page" aria-label="锁"><!---->锁<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/reentrantLock.html" class="nav-link sidebar-link sidebar-page" aria-label="重入锁ReentrantLock"><!---->重入锁ReentrantLock<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ReentrantReadWriteLock.html" class="nav-link sidebar-link sidebar-page" aria-label="读写锁ReentrantReadWriteLock"><!---->读写锁ReentrantReadWriteLock<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/condition.html" class="nav-link sidebar-link sidebar-page" aria-label="线程协作类Condition"><!---->线程协作类Condition<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/LockSupport.html" class="nav-link sidebar-link sidebar-page" aria-label="线程阻塞唤醒类LockSupport"><!---->线程阻塞唤醒类LockSupport<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/map.html" class="nav-link sidebar-link sidebar-page" aria-label="并发集合容器"><!---->并发集合容器<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ConcurrentHashMap.html" class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentHashMap"><!---->ConcurrentHashMap<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/thread/ConcurrentLinkedQueue.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="ConcurrentLinkedQueue"><!---->ConcurrentLinkedQueue<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ConcurrentLinkedQueue.html#node" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="Node"><!---->Node<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ConcurrentLinkedQueue.html#操作node的几个cas操作" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="操作Node的几个CAS操作"><!---->操作Node的几个CAS操作<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ConcurrentLinkedQueue.html#offer方法" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="offer方法"><!---->offer方法<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ConcurrentLinkedQueue.html#单线程执行角度分析" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="单线程执行角度分析："><!---->单线程执行角度分析：<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ConcurrentLinkedQueue.html#多线程执行角度分析" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="多线程执行角度分析"><!---->多线程执行角度分析<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ConcurrentLinkedQueue.html#poll方法" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="poll方法"><!---->poll方法<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ConcurrentLinkedQueue.html#定位删除的队头节点" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="定位删除的队头节点"><!---->定位删除的队头节点<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ConcurrentLinkedQueue.html#多线程执行情况分析" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="多线程执行情况分析："><!---->多线程执行情况分析：<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ConcurrentLinkedQueue.html#offer方法中部分线程offer部分线程poll" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="offer方法中部分线程offer部分线程poll"><!---->offer方法中部分线程offer部分线程poll<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ConcurrentLinkedQueue.html#hops的设计" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="HOPS的设计"><!---->HOPS的设计<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/thread/CopyOnWriteArrayList.html" class="nav-link sidebar-link sidebar-page" aria-label="CopyOnWriteArrayList"><!---->CopyOnWriteArrayList<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ThreadLocal.html" class="nav-link sidebar-link sidebar-page" aria-label="ThreadLocal"><!---->ThreadLocal<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/BlockingQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="BlockingQueue"><!---->BlockingQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/pool.html" class="nav-link sidebar-link sidebar-page" aria-label="线程池"><!---->线程池<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ScheduledThreadPoolExecutor.html" class="nav-link sidebar-link sidebar-page" aria-label="计划任务"><!---->计划任务<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/atomic.html" class="nav-link sidebar-link sidebar-page" aria-label="原子操作类"><!---->原子操作类<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CountDownLatch.html" class="nav-link sidebar-link sidebar-page" aria-label="通信工具类CountDownLatch"><!---->通信工具类CountDownLatch<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/fork-join.html" class="nav-link sidebar-link sidebar-page" aria-label="Fork/Join框架"><!---->Fork/Join框架<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/shengchanzhe-xiaofeizhe.html" class="nav-link sidebar-link sidebar-page" aria-label="生产者-消费者模式"><!---->生产者-消费者模式<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->吊打Java并发面试官之ConcurrentLinkedQueue</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月23日</span><meta property="datePublished" content="2022-03-23T12:08:58.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 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class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ConcurrentLinkedQueue.html#node" class="router-link-active router-link-exact-active toc-link level2">Node</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ConcurrentLinkedQueue.html#操作node的几个cas操作" class="router-link-active router-link-exact-active toc-link level3">操作Node的几个CAS操作</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ConcurrentLinkedQueue.html#offer方法" class="router-link-active router-link-exact-active toc-link level2">offer方法</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ConcurrentLinkedQueue.html#单线程执行角度分析" class="router-link-active router-link-exact-active toc-link level3">单线程执行角度分析：</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ConcurrentLinkedQueue.html#多线程执行角度分析" class="router-link-active router-link-exact-active toc-link level3">多线程执行角度分析</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ConcurrentLinkedQueue.html#poll方法" class="router-link-active router-link-exact-active toc-link level2">poll方法</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ConcurrentLinkedQueue.html#定位删除的队头节点" class="router-link-active router-link-exact-active toc-link level3">定位删除的队头节点</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ConcurrentLinkedQueue.html#多线程执行情况分析" class="router-link-active router-link-exact-active toc-link level3">多线程执行情况分析：</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ConcurrentLinkedQueue.html#offer方法中部分线程offer部分线程poll" class="router-link-active router-link-exact-active toc-link level2">offer方法中部分线程offer部分线程poll</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ConcurrentLinkedQueue.html#hops的设计" class="router-link-active router-link-exact-active toc-link level2">HOPS的设计</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><p>队列是我们常用的一种数据结构，为了解决线程安全的问题，Doug Lea大师为我们准备了ConcurrentLinkedQueue这个线程安全的队列。从类名就可以看的出来实现队列的数据结构是链式。</p><h2 id="node" tabindex="-1"><a class="header-anchor" href="#node" aria-hidden="true">#</a> Node</h2><p>要想先学习ConcurrentLinkedQueue自然而然得先从它的节点类看起，明白它的底层数据结构。Node类的源码为：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">private</span> <span class="token keyword">static</span> <span class="token keyword">class</span> <span class="token class-name">Node</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">E</span><span class="token punctuation">&gt;</span></span> <span class="token punctuation">{</span>
         <span class="token keyword">volatile</span> <span class="token class-name">E</span> item<span class="token punctuation">;</span>
         <span class="token keyword">volatile</span> <span class="token class-name">Node</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">E</span><span class="token punctuation">&gt;</span></span> next<span class="token punctuation">;</span>
 		<span class="token punctuation">.</span><span class="token punctuation">.</span><span class="token punctuation">.</span><span class="token punctuation">.</span><span class="token punctuation">.</span><span class="token punctuation">.</span><span class="token punctuation">.</span>
@@ -142,6 +142,6 @@ queue<span class="token punctuation">.</span><span class="token function">offer<
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>输出结果为：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>Thread-0 poll 的值为：null
 queue当前是否为空队列：false
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><p>通过debug控制线程thread1和线程thread2的执行顺序，thread1先执行到第8行代码<code>if ((q = p.next) == null)</code>，由于此时队列为空队列if判断为true，进入if块，此时先让thread1暂停，然后thread2进行offer插入值为1的节点后，thread2执行结束。再让thread1执行，这时<strong>thread1并没有进行重试</strong>，而是代码继续往下走，返回null，尽管此时队列由于thread2已经插入了值为1的新的节点。所以输出结果为thread0 poll的为null,然队列不为空队列。因此，<strong>在判断队列是否为空队列的时候是不能通过线程在poll的时候返回为null进行判断的，可以通过isEmpty方法进行判断</strong>。</p><h2 id="offer方法中部分线程offer部分线程poll" tabindex="-1"><a class="header-anchor" href="#offer方法中部分线程offer部分线程poll" aria-hidden="true">#</a> offer方法中部分线程offer部分线程poll</h2><p>在分析offer方法的时候我们还留下了一个问题，即对offer方法中第11行代码的理解。</p><blockquote><p><strong>offer-&gt;poll-&gt;offer</strong></p></blockquote><p>在offer方法的第11行代码<code>if (p == q)</code>，能够让if判断为true的情况为p指向的节点为<strong>哨兵节点</strong>，而什么时候会构造哨兵节点呢？在对poll方法的讨论中，我们已经找到了答案，即**当head指向的节点的item域为null时会寻找真正的队头节点，等到待插入的节点插入之后，会更新head，并且将原来head指向的节点设置为哨兵节点。**假设队列初始状态如下图所示：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/ConcurrentLinkedQueue-10.png" alt="offer和poll相互影响分析时队列初始状态.png"></p><p>因此在线程A执行offer时，线程B执行poll就会存在如下一种情况：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/ConcurrentLinkedQueue-11.png" alt="线程A和线程B可能存在的执行时序"></p><p>如图，线程A的tail节点存在next节点Node1,因此会通过引用q往前寻找队列真正的队尾节点，当执行到判断<code>if (p == q)</code>时，此时线程B执行poll操作，在对线程B来说，head和p指向Node0,由于Node0的item域为null,同样会往前递进找到队列真正的队头节点Node1,在线程B执行完poll之后，Node0就会转换为<strong>哨兵节点</strong>，也就意味着队列的head发生了改变，此时队列状态为下图。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/ConcurrentLinkedQueue-12.png" alt="线程B进行poll后队列的状态图"></p><p>此时线程A在执行判断<code>if (p == q)</code>时就为true,会继续执行<code> p = (t != (t = tail)) ? t : head;</code>，由于tail指针没有发生改变所以p被赋值为head,重新从head开始完成插入操作。</p><h2 id="hops的设计" tabindex="-1"><a class="header-anchor" href="#hops的设计" aria-hidden="true">#</a> HOPS的设计</h2><p>通过上面对offer和poll方法的分析，我们发现tail和head是延迟更新的，两者更新触发时机为：</p><p><strong>tail更新触发时机</strong>：当tail指向的节点的下一个节点不为null的时候，会执行定位队列真正的队尾节点的操作，找到队尾节点后完成插入之后才会通过casTail进行tail更新；当tail指向的节点的下一个节点为null的时候，只插入节点不更新tail。</p><p>**head更新触发时机：**当head指向的节点的item域为null的时候，会执行定位队列真正的队头节点的操作，找到队头节点后完成删除之后才会通过updateHead进行head更新；当head指向的节点的item域不为null的时候，只删除节点不更新head。</p><p>并且在更新操作时，源码中会有注释为：<strong>hop two nodes at a time</strong>。所以这种延迟更新的策略就被叫做HOPS的大概原因是这个（猜的 😃），从上面更新时的状态图可以看出，head和tail的更新是“跳着的”即中间总是间隔了一个。那么这样设计的意图是什么呢？</p><p>如果让tail永远作为队列的队尾节点，实现的代码量会更少，而且逻辑更易懂。但是，这样做有一个缺点，**如果大量的入队操作，每次都要执行CAS进行tail的更新，汇总起来对性能也会是大大的损耗。如果能减少CAS更新的操作，无疑可以大大提升入队的操作效率，所以doug lea大师每间隔1次（tail和队尾节点的距离为1）进行才利用CAS更新tail。**对head的更新也是同样的道理，虽然，这样设计会多出在循环中定位队尾节点，但总体来说读的操作效率要远远高于写的性能，因此，多出来的在循环中定位尾节点的操作的性能损耗相对而言是很小的。</p><hr><blockquote><p>编辑：沉默王二，内容大部分来源以下三个开源仓库：</p><ul><li><a href="http://concurrent.redspider.group/" target="_blank" rel="noopener noreferrer">深入浅出 Java 多线程<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://github.com/CL0610/Java-concurrency" target="_blank" rel="noopener noreferrer">并发编程知识总结<span><svg class="external-link-icon" 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-    <script type="module" src="/assets/app.a0271b9c.js" defer></script>
+    <script type="module" src="/assets/app.615e41d8.js" defer></script>
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diff --git a/dist/thread/CopyOnWriteArrayList.html b/dist/thread/CopyOnWriteArrayList.html
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href="/thread/synchronized.html" class="nav-link sidebar-link sidebar-page" aria-label="synchronized"><!---->synchronized<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/cas.html" class="nav-link sidebar-link sidebar-page" aria-label="CAS的原理"><!---->CAS的原理<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/aqs.html" class="nav-link sidebar-link sidebar-page" aria-label="AQS详解"><!---->AQS详解<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/lock.html" class="nav-link sidebar-link sidebar-page" aria-label="锁"><!---->锁<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/reentrantLock.html" class="nav-link sidebar-link sidebar-page" aria-label="重入锁ReentrantLock"><!---->重入锁ReentrantLock<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ReentrantReadWriteLock.html" class="nav-link sidebar-link sidebar-page" aria-label="读写锁ReentrantReadWriteLock"><!---->读写锁ReentrantReadWriteLock<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/condition.html" class="nav-link sidebar-link sidebar-page" aria-label="线程协作类Condition"><!---->线程协作类Condition<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/LockSupport.html" class="nav-link sidebar-link sidebar-page" aria-label="线程阻塞唤醒类LockSupport"><!---->线程阻塞唤醒类LockSupport<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/map.html" class="nav-link sidebar-link sidebar-page" aria-label="并发集合容器"><!---->并发集合容器<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ConcurrentHashMap.html" class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentHashMap"><!---->ConcurrentHashMap<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ConcurrentLinkedQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentLinkedQueue"><!---->ConcurrentLinkedQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/thread/CopyOnWriteArrayList.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="CopyOnWriteArrayList"><!---->CopyOnWriteArrayList<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/CopyOnWriteArrayList.html#copyonwritearraylist的简介" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="CopyOnWriteArrayList的简介"><!---->CopyOnWriteArrayList的简介<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/CopyOnWriteArrayList.html#cow的设计思想" class="router-link-active router-link-exact-active nav-link sidebar-link heading" 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class="sidebar-sub-header"><a aria-current="page" href="/thread/CopyOnWriteArrayList.html#总结" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="总结"><!---->总结<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/CopyOnWriteArrayList.html#cow-vs-读写锁" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="COW  vs 读写锁"><!---->COW  vs 读写锁<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/CopyOnWriteArrayList.html#cow的缺点" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="COW的缺点"><!---->COW的缺点<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li></ul><!--]--></li><li><!--[--><a href="/thread/ThreadLocal.html" class="nav-link sidebar-link sidebar-page" aria-label="ThreadLocal"><!---->ThreadLocal<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/BlockingQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="BlockingQueue"><!---->BlockingQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/pool.html" class="nav-link sidebar-link sidebar-page" aria-label="线程池"><!---->线程池<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ScheduledThreadPoolExecutor.html" class="nav-link sidebar-link sidebar-page" aria-label="计划任务"><!---->计划任务<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/atomic.html" class="nav-link sidebar-link sidebar-page" aria-label="原子操作类"><!---->原子操作类<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CountDownLatch.html" class="nav-link sidebar-link sidebar-page" aria-label="通信工具类CountDownLatch"><!---->通信工具类CountDownLatch<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/fork-join.html" class="nav-link sidebar-link sidebar-page" aria-label="Fork/Join框架"><!---->Fork/Join框架<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/shengchanzhe-xiaofeizhe.html" class="nav-link sidebar-link sidebar-page" aria-label="生产者-消费者模式"><!---->生产者-消费者模式<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span 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class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->吊打Java并发面试官之CopyOnWriteArrayList</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span 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level2">CopyOnWriteArrayList的简介</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/CopyOnWriteArrayList.html#cow的设计思想" class="router-link-active router-link-exact-active toc-link level2">COW的设计思想</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/CopyOnWriteArrayList.html#copyonwritearraylist的实现原理" class="router-link-active router-link-exact-active toc-link level2">CopyOnWriteArrayList的实现原理</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/CopyOnWriteArrayList.html#get方法实现原理" class="router-link-active router-link-exact-active toc-link level3">get方法实现原理</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/CopyOnWriteArrayList.html#add方法实现原理" class="router-link-active router-link-exact-active toc-link level3">add方法实现原理</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/CopyOnWriteArrayList.html#总结" class="router-link-active router-link-exact-active toc-link level2">总结</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/CopyOnWriteArrayList.html#cow-vs-读写锁" class="router-link-active router-link-exact-active toc-link level3">COW  vs 读写锁</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/CopyOnWriteArrayList.html#cow的缺点" class="router-link-active router-link-exact-active toc-link level3">COW的缺点</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h2 id="copyonwritearraylist的简介" tabindex="-1"><a class="header-anchor" href="#copyonwritearraylist的简介" aria-hidden="true">#</a> CopyOnWriteArrayList的简介</h2><p>java学习者都清楚ArrayList并不是线程安全的，在读线程在读取ArrayList的时候如果有写线程在写数据的时候，基于fast-fail机制，会抛出<strong>ConcurrentModificationException</strong>异常，也就是说ArrayList并不是一个线程安全的容器，当然您可以用Vector,或者使用Collections的静态方法将ArrayList包装成一个线程安全的类，但是这些方式都是采用java关键字synchronzied对方法进行修饰，利用独占式锁来保证线程安全的。但是，由于独占式锁在同一时刻只有一个线程能够获取到对象监视器，很显然这种方式效率并不是太高。</p><p>回到业务场景中，有很多业务往往是读多写少的，比如系统配置的信息，除了在初始进行系统配置的时候需要写入数据，其他大部分时刻其他模块之后对系统信息只需要进行读取，又比如白名单，黑名单等配置，只需要读取名单配置然后检测当前用户是否在该配置范围以内。</p><p>类似的还有很多业务场景，它们都是属于<strong>读多写少</strong>的场景。如果在这种情况用到上述的方法，使用Vector,Collections转换的这些方式是不合理的，因为尽管多个读线程从同一个数据容器中读取数据，但是读线程对数据容器的数据并不会发生发生修改。</p><p>很自然而然的我们会联想到ReenTrantReadWriteLock，通过<strong>读写分离</strong>的思想，使得读读之间不会阻塞，无疑如果一个list能够做到被多个读线程读取的话，性能会大大提升不少。但是，如果仅仅是将list通过读写锁（ReentrantReadWriteLock）进行再一次封装的话，由于读写锁的特性，当写锁被写线程获取后，读写线程都会被阻塞。如果仅仅使用读写锁对list进行封装的话，这里仍然存在读线程在读数据的时候被阻塞的情况，如果想list的读效率更高的话，这里就是我们的突破口，如果我们保证读线程无论什么时候都不被阻塞，效率岂不是会更高？</p><p>Doug Lea大师就为我们提供CopyOnWriteArrayList容器可以保证线程安全，保证读读之间在任何时候都不会被阻塞，CopyOnWriteArrayList也被广泛应用于很多业务场景之中，CopyOnWriteArrayList值得被我们好好认识一番。</p><h2 id="cow的设计思想" tabindex="-1"><a class="header-anchor" href="#cow的设计思想" aria-hidden="true">#</a> COW的设计思想</h2><p>回到上面所说的，如果简单的使用读写锁的话，在写锁被获取之后，读写线程被阻塞，只有当写锁被释放后读线程才有机会获取到锁从而读到最新的数据，站在<strong>读线程的角度来看，即读线程任何时候都是获取到最新的数据，满足数据实时性</strong>。</p><p>既然我们说到要进行优化，必然有trade-off,我们就可以<strong>牺牲数据实时性满足数据的最终一致性即可</strong>。而CopyOnWriteArrayList就是通过Copy-On-Write(COW)，即写时复制的思想来通过延时更新的策略来实现数据的最终一致性，并且能够保证读线程间不阻塞。</p><p>COW通俗的理解是当我们往一个容器添加元素的时候，不直接往当前容器添加，而是先将当前容器进行Copy，复制出一个新的容器，然后新的容器里添加元素，添加完元素之后，再将原容器的引用指向新的容器。</p><p>对CopyOnWrite容器进行并发的读的时候，不需要加锁，因为当前容器不会添加任何元素。所以CopyOnWrite容器也是一种读写分离的思想，延时更新的策略是通过在写的时候针对的是不同的数据容器来实现的，放弃数据实时性达到数据的最终一致性。</p><h2 id="copyonwritearraylist的实现原理" tabindex="-1"><a class="header-anchor" href="#copyonwritearraylist的实现原理" aria-hidden="true">#</a> CopyOnWriteArrayList的实现原理</h2><p>现在我们来通过看源码的方式来理解CopyOnWriteArrayList，实际上CopyOnWriteArrayList内部维护的就是一个数组</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token doc-comment comment">/** The array, accessed only via getArray/setArray. */</span>
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clickable"><!----><span class="title">2.1 Java概述</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.2 Java基础语法</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.3 面向对象编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.4 字符串&amp;数组</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.5 集合框架（容器）</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.6 IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">2.11 并发编程</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/thread/wangzhe-thread.html" class="nav-link sidebar-link sidebar-page" aria-label="创建Java线程的3种方式"><!---->创建Java线程的3种方式<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/thread-state-and-method.html" class="nav-link sidebar-link sidebar-page" aria-label="线程的6种状态及切换"><!---->线程的6种状态及切换<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/thread-group-and-thread-priority.html" class="nav-link sidebar-link sidebar-page" aria-label="线程组和线程优先级"><!---->线程组和线程优先级<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/why-need-thread.html" class="nav-link sidebar-link sidebar-page" aria-label="进程与线程的区别"><!---->进程与线程的区别<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/thread-bring-some-problem.html" class="nav-link sidebar-link sidebar-page" aria-label="并发编程带来了哪些问题"><!---->并发编程带来了哪些问题<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/jmm.html" class="nav-link sidebar-link sidebar-page" aria-label="Java内存模型"><!---->Java内存模型<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/volatile.html" class="nav-link sidebar-link sidebar-page" aria-label="volatile"><!---->volatile<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/synchronized.html" class="nav-link sidebar-link sidebar-page" aria-label="synchronized"><!---->synchronized<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/cas.html" class="nav-link sidebar-link sidebar-page" aria-label="CAS的原理"><!---->CAS的原理<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/aqs.html" class="nav-link sidebar-link sidebar-page" aria-label="AQS详解"><!---->AQS详解<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/lock.html" class="nav-link sidebar-link sidebar-page" aria-label="锁"><!---->锁<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/reentrantLock.html" class="nav-link sidebar-link sidebar-page" aria-label="重入锁ReentrantLock"><!---->重入锁ReentrantLock<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ReentrantReadWriteLock.html" class="nav-link sidebar-link sidebar-page" aria-label="读写锁ReentrantReadWriteLock"><!---->读写锁ReentrantReadWriteLock<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/condition.html" class="nav-link sidebar-link sidebar-page" aria-label="线程协作类Condition"><!---->线程协作类Condition<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/LockSupport.html" class="nav-link sidebar-link sidebar-page" aria-label="线程阻塞唤醒类LockSupport"><!---->线程阻塞唤醒类LockSupport<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/map.html" class="nav-link sidebar-link sidebar-page" aria-label="并发集合容器"><!---->并发集合容器<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ConcurrentHashMap.html" class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentHashMap"><!---->ConcurrentHashMap<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ConcurrentLinkedQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentLinkedQueue"><!---->ConcurrentLinkedQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/thread/CopyOnWriteArrayList.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="CopyOnWriteArrayList"><!---->CopyOnWriteArrayList<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/CopyOnWriteArrayList.html#copyonwritearraylist的简介" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="CopyOnWriteArrayList的简介"><!---->CopyOnWriteArrayList的简介<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/CopyOnWriteArrayList.html#cow的设计思想" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="COW的设计思想"><!---->COW的设计思想<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/CopyOnWriteArrayList.html#copyonwritearraylist的实现原理" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="CopyOnWriteArrayList的实现原理"><!---->CopyOnWriteArrayList的实现原理<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/CopyOnWriteArrayList.html#get方法实现原理" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="get方法实现原理"><!---->get方法实现原理<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/CopyOnWriteArrayList.html#add方法实现原理" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="add方法实现原理"><!---->add方法实现原理<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/CopyOnWriteArrayList.html#总结" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="总结"><!---->总结<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/CopyOnWriteArrayList.html#cow-vs-读写锁" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="COW  vs 读写锁"><!---->COW  vs 读写锁<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/CopyOnWriteArrayList.html#cow的缺点" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="COW的缺点"><!---->COW的缺点<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li></ul><!--]--></li><li><!--[--><a href="/thread/ThreadLocal.html" class="nav-link sidebar-link sidebar-page" aria-label="ThreadLocal"><!---->ThreadLocal<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/BlockingQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="BlockingQueue"><!---->BlockingQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/pool.html" class="nav-link sidebar-link sidebar-page" aria-label="线程池"><!---->线程池<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ScheduledThreadPoolExecutor.html" class="nav-link sidebar-link sidebar-page" aria-label="计划任务"><!---->计划任务<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/atomic.html" class="nav-link sidebar-link sidebar-page" aria-label="原子操作类"><!---->原子操作类<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CountDownLatch.html" class="nav-link sidebar-link sidebar-page" aria-label="通信工具类CountDownLatch"><!---->通信工具类CountDownLatch<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/fork-join.html" class="nav-link sidebar-link sidebar-page" aria-label="Fork/Join框架"><!---->Fork/Join框架<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/shengchanzhe-xiaofeizhe.html" class="nav-link sidebar-link sidebar-page" aria-label="生产者-消费者模式"><!---->生产者-消费者模式<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->吊打Java并发面试官之CopyOnWriteArrayList</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月23日</span><meta property="datePublished" content="2022-03-23T12:08:58.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon 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15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 8 分钟</span><meta property="timeRequired" content="PT8M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/CopyOnWriteArrayList.html#copyonwritearraylist的简介" class="router-link-active router-link-exact-active toc-link level2">CopyOnWriteArrayList的简介</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/CopyOnWriteArrayList.html#cow的设计思想" class="router-link-active router-link-exact-active toc-link level2">COW的设计思想</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/CopyOnWriteArrayList.html#copyonwritearraylist的实现原理" class="router-link-active router-link-exact-active toc-link level2">CopyOnWriteArrayList的实现原理</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/CopyOnWriteArrayList.html#get方法实现原理" class="router-link-active router-link-exact-active toc-link level3">get方法实现原理</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/CopyOnWriteArrayList.html#add方法实现原理" class="router-link-active router-link-exact-active toc-link level3">add方法实现原理</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/CopyOnWriteArrayList.html#总结" class="router-link-active router-link-exact-active toc-link level2">总结</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/CopyOnWriteArrayList.html#cow-vs-读写锁" class="router-link-active router-link-exact-active toc-link level3">COW  vs 读写锁</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/CopyOnWriteArrayList.html#cow的缺点" class="router-link-active router-link-exact-active toc-link level3">COW的缺点</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h2 id="copyonwritearraylist的简介" tabindex="-1"><a class="header-anchor" href="#copyonwritearraylist的简介" aria-hidden="true">#</a> CopyOnWriteArrayList的简介</h2><p>java学习者都清楚ArrayList并不是线程安全的，在读线程在读取ArrayList的时候如果有写线程在写数据的时候，基于fast-fail机制，会抛出<strong>ConcurrentModificationException</strong>异常，也就是说ArrayList并不是一个线程安全的容器，当然您可以用Vector,或者使用Collections的静态方法将ArrayList包装成一个线程安全的类，但是这些方式都是采用java关键字synchronzied对方法进行修饰，利用独占式锁来保证线程安全的。但是，由于独占式锁在同一时刻只有一个线程能够获取到对象监视器，很显然这种方式效率并不是太高。</p><p>回到业务场景中，有很多业务往往是读多写少的，比如系统配置的信息，除了在初始进行系统配置的时候需要写入数据，其他大部分时刻其他模块之后对系统信息只需要进行读取，又比如白名单，黑名单等配置，只需要读取名单配置然后检测当前用户是否在该配置范围以内。</p><p>类似的还有很多业务场景，它们都是属于<strong>读多写少</strong>的场景。如果在这种情况用到上述的方法，使用Vector,Collections转换的这些方式是不合理的，因为尽管多个读线程从同一个数据容器中读取数据，但是读线程对数据容器的数据并不会发生发生修改。</p><p>很自然而然的我们会联想到ReenTrantReadWriteLock，通过<strong>读写分离</strong>的思想，使得读读之间不会阻塞，无疑如果一个list能够做到被多个读线程读取的话，性能会大大提升不少。但是，如果仅仅是将list通过读写锁（ReentrantReadWriteLock）进行再一次封装的话，由于读写锁的特性，当写锁被写线程获取后，读写线程都会被阻塞。如果仅仅使用读写锁对list进行封装的话，这里仍然存在读线程在读数据的时候被阻塞的情况，如果想list的读效率更高的话，这里就是我们的突破口，如果我们保证读线程无论什么时候都不被阻塞，效率岂不是会更高？</p><p>Doug Lea大师就为我们提供CopyOnWriteArrayList容器可以保证线程安全，保证读读之间在任何时候都不会被阻塞，CopyOnWriteArrayList也被广泛应用于很多业务场景之中，CopyOnWriteArrayList值得被我们好好认识一番。</p><h2 id="cow的设计思想" tabindex="-1"><a class="header-anchor" href="#cow的设计思想" aria-hidden="true">#</a> COW的设计思想</h2><p>回到上面所说的，如果简单的使用读写锁的话，在写锁被获取之后，读写线程被阻塞，只有当写锁被释放后读线程才有机会获取到锁从而读到最新的数据，站在<strong>读线程的角度来看，即读线程任何时候都是获取到最新的数据，满足数据实时性</strong>。</p><p>既然我们说到要进行优化，必然有trade-off,我们就可以<strong>牺牲数据实时性满足数据的最终一致性即可</strong>。而CopyOnWriteArrayList就是通过Copy-On-Write(COW)，即写时复制的思想来通过延时更新的策略来实现数据的最终一致性，并且能够保证读线程间不阻塞。</p><p>COW通俗的理解是当我们往一个容器添加元素的时候，不直接往当前容器添加，而是先将当前容器进行Copy，复制出一个新的容器，然后新的容器里添加元素，添加完元素之后，再将原容器的引用指向新的容器。</p><p>对CopyOnWrite容器进行并发的读的时候，不需要加锁，因为当前容器不会添加任何元素。所以CopyOnWrite容器也是一种读写分离的思想，延时更新的策略是通过在写的时候针对的是不同的数据容器来实现的，放弃数据实时性达到数据的最终一致性。</p><h2 id="copyonwritearraylist的实现原理" tabindex="-1"><a class="header-anchor" href="#copyonwritearraylist的实现原理" aria-hidden="true">#</a> CopyOnWriteArrayList的实现原理</h2><p>现在我们来通过看源码的方式来理解CopyOnWriteArrayList，实际上CopyOnWriteArrayList内部维护的就是一个数组</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token doc-comment comment">/** The array, accessed only via getArray/setArray. */</span>
 <span class="token keyword">private</span> <span class="token keyword">transient</span> <span class="token keyword">volatile</span> <span class="token class-name">Object</span><span class="token punctuation">[</span><span class="token punctuation">]</span> array<span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><p>并且该数组引用是被volatile修饰，注意这里<strong>仅仅是修饰的是数组引用</strong>，其中另有玄机，稍后揭晓。关于volatile很重要的一条性质是它能够够保证可见性。对list来说，我们自然而然最关心的就是读写的时候，分别为get和add方法的实现。</p><h3 id="get方法实现原理" tabindex="-1"><a class="header-anchor" href="#get方法实现原理" aria-hidden="true">#</a> get方法实现原理</h3><p>get方法的源码为：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token class-name">E</span> <span class="token function">get</span><span class="token punctuation">(</span><span class="token keyword">int</span> index<span class="token punctuation">)</span> <span class="token punctuation">{</span>
     <span class="token keyword">return</span> <span class="token function">get</span><span class="token punctuation">(</span><span class="token function">getArray</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">,</span> index<span class="token punctuation">)</span><span class="token punctuation">;</span>
@@ -86,6 +86,6 @@
 <span class="token number">4.</span>newElements<span class="token punctuation">[</span>len<span class="token punctuation">]</span> <span class="token operator">=</span> e<span class="token punctuation">;</span>
 <span class="token number">5.</span><span class="token function">setArray</span><span class="token punctuation">(</span>newElements<span class="token punctuation">)</span><span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>假设COW的变化如下图所示：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/CopyOnWriteArrayList-01.png" alt="最终一致性的分析"></p><p>数组中已有数据1,2,3，现在写线程想往数组中添加数据4，我们在第5行处打上断点，让写线程暂停。读线程依然会“不受影响”的能从数组中读取数据，可是还是只能读到1,2,3。<strong>如果读线程能够立即读到新添加的数据的话就叫做能保证数据实时性</strong>。当对第5行的断点放开后，读线程才能感知到数据变化，读到完整的数据1,2,3,4，而保证<strong>数据最终一致性</strong>，尽管有可能中间间隔了好几秒才感知到。</p><p>这里还有这样一个问题： <strong>为什么需要复制呢？ 如果将array 数组设定为volitile的， 对volatile变量写happens-before读，读线程不是能够感知到volatile变量的变化</strong>。</p><p>原因是，这里volatile的修饰的<strong>仅仅</strong>只是<strong>数组引用</strong>，<strong>数组中的元素的修改是不能保证可见性的</strong>。因此COW采用的是新旧两个数据容器，通过第5行代码将数组引用指向新的数组。</p><h3 id="cow的缺点" tabindex="-1"><a class="header-anchor" href="#cow的缺点" aria-hidden="true">#</a> <strong>COW的缺点</strong></h3><p>CopyOnWrite容器有很多优点，但是同时也存在两个问题，即内存占用问题和数据一致性问题。所以在开发的时候需要注意一下。</p><ol><li><strong>内存占用问题</strong>：因为CopyOnWrite的写时复制机制，所以在进行写操作的时候，内存里会同时驻扎两个对 象的内存，旧的对象和新写入的对象（注意:在复制的时候只是复制容器里的引用，只是在写的时候会创建新对 象添加到新容器里，而旧容器的对象还在使用，所以有两份对象内存）。</li></ol><p>如果这些对象占用的内存比较大，比 如说200M左右，那么再写入100M数据进去，内存就会占用300M，那么这个时候很有可能造成频繁的minor GC和major GC。</p><ol start="2"><li><strong>数据一致性问题</strong>：CopyOnWrite容器只能保证数据的最终一致性，不能保证数据的实时一致性。所以如果你希望写入的的数据，马上能读到，请不要使用CopyOnWrite容器。</li></ol><hr><blockquote><p>编辑：沉默王二，内容大部分来源以下三个开源仓库：</p><ul><li><a href="http://concurrent.redspider.group/" target="_blank" rel="noopener noreferrer">深入浅出 Java 多线程<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" 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class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java并发编程通信工具类CountDownLatch等一网打尽</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" 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88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 16 分钟</span><meta property="timeRequired" content="PT16M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/CountDownLatch.html#semaphore" class="router-link-active router-link-exact-active toc-link level2">Semaphore</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/CountDownLatch.html#semaphore介绍" class="router-link-active router-link-exact-active toc-link level3">Semaphore介绍</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/CountDownLatch.html#semaphore案例" class="router-link-active router-link-exact-active toc-link level3">Semaphore案例</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/CountDownLatch.html#semaphore原理" class="router-link-active router-link-exact-active toc-link level3">Semaphore原理</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/CountDownLatch.html#exchanger" class="router-link-active router-link-exact-active toc-link level2">Exchanger</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/CountDownLatch.html#countdownlatch" class="router-link-active router-link-exact-active toc-link level2">CountDownLatch</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/CountDownLatch.html#countdownlatch介绍" class="router-link-active router-link-exact-active toc-link level3">CountDownLatch介绍</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/CountDownLatch.html#countdownlatch案例" class="router-link-active router-link-exact-active toc-link level3">CountDownLatch案例</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/CountDownLatch.html#countdownlatch原理" class="router-link-active router-link-exact-active toc-link level3">CountDownLatch原理</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/CountDownLatch.html#cyclicbarrier" class="router-link-active router-link-exact-active toc-link level2">CyclicBarrier</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/CountDownLatch.html#cyclicbarrier介绍" class="router-link-active router-link-exact-active toc-link level3">CyclicBarrier介绍</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/CountDownLatch.html#cyclicbarrier-barrier被破坏" class="router-link-active router-link-exact-active toc-link level3">CyclicBarrier Barrier被破坏</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/CountDownLatch.html#cyclicbarrier案例" class="router-link-active router-link-exact-active toc-link level3">CyclicBarrier案例</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/CountDownLatch.html#cyclicbarrier原理" class="router-link-active router-link-exact-active toc-link level3">CyclicBarrier原理</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/CountDownLatch.html#phaser" class="router-link-active router-link-exact-active toc-link level2">Phaser</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/CountDownLatch.html#phaser介绍" class="router-link-active router-link-exact-active toc-link level3">Phaser介绍</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/CountDownLatch.html#phaser案例" class="router-link-active router-link-exact-active toc-link level3">Phaser案例</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/CountDownLatch.html#phaser原理" class="router-link-active router-link-exact-active toc-link level3">Phaser原理</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><p>JDK中提供了一些工具类以供开发者使用。这样的话我们在遇到一些常见的应用场景时就可以使用这些工具类，而不用自己再重复造轮子了。</p><p>它们都在java.util.concurrent包下。先总体概括一下都有哪些工具类，它们有什么作用，然后再分别介绍它们的主要使用方法和原理。</p><table><thead><tr><th>类</th><th>作用</th></tr></thead><tbody><tr><td>Semaphore</td><td>限制线程的数量</td></tr><tr><td>Exchanger</td><td>两个线程交换数据</td></tr><tr><td>CountDownLatch</td><td>线程等待直到计数器减为0时开始工作</td></tr><tr><td>CyclicBarrier</td><td>作用跟CountDownLatch类似，但是可以重复使用</td></tr><tr><td>Phaser</td><td>增强的CyclicBarrier</td></tr></tbody></table><p>下面分别介绍这几个类。</p><h2 id="semaphore" tabindex="-1"><a class="header-anchor" href="#semaphore" aria-hidden="true">#</a> Semaphore</h2><h3 id="semaphore介绍" tabindex="-1"><a class="header-anchor" href="#semaphore介绍" aria-hidden="true">#</a> Semaphore介绍</h3><p>Semaphore翻译过来是信号的意思。顾名思义，这个工具类提供的功能就是多个线程彼此“打信号”。而这个“信号”是一个<code>int</code>类型的数据，也可以看成是一种“资源”。</p><p>可以在构造函数中传入初始资源总数，以及是否使用“公平”的同步器。默认情况下，是非公平的。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token comment">// 默认情况下使用非公平</span>
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45.227 9.386 42.667 42.667 0 0 1 10.24 42.667 358.4 358.4 0 0 0 82.773 375.893 361.387 361.387 0 0 0 376.747 82.774 42.667 42.667 0 0 1 54.187 55.04 433.493 433.493 0 0 1-99.84 154.88 438.613 438.613 0 0 1-311.467 128z"></path></svg><svg xmlns="http://www.w3.org/2000/svg" class="icon light-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="light icon" style="display:none;"><path d="M952 552h-80a40 40 0 0 1 0-80h80a40 40 0 0 1 0 80zM801.88 280.08a41 41 0 0 1-57.96-57.96l57.96-58a41.04 41.04 0 0 1 58 58l-58 57.96zM512 752a240 240 0 1 1 0-480 240 240 0 0 1 0 480zm0-560a40 40 0 0 1-40-40V72a40 40 0 0 1 80 0v80a40 40 0 0 1-40 40zm-289.88 88.08-58-57.96a41.04 41.04 0 0 1 58-58l57.96 58a41 41 0 0 1-57.96 57.96zM192 512a40 40 0 0 1-40 40H72a40 40 0 0 1 0-80h80a40 40 0 0 1 40 40zm30.12 231.92a41 41 0 0 1 57.96 57.96l-57.96 58a41.04 41.04 0 0 1-58-58l58-57.96zM512 832a40 40 0 0 1 40 40v80a40 40 0 0 1-80 0v-80a40 40 0 0 1 40-40zm289.88-88.08 58 57.96a41.04 41.04 0 0 1-58 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clickable"><!----><span class="title">2.1 Java概述</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.2 Java基础语法</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.3 面向对象编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.4 字符串&amp;数组</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.5 集合框架（容器）</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.6 IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">2.11 并发编程</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/thread/wangzhe-thread.html" class="nav-link sidebar-link sidebar-page" aria-label="创建Java线程的3种方式"><!---->创建Java线程的3种方式<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/thread-state-and-method.html" class="nav-link sidebar-link sidebar-page" aria-label="线程的6种状态及切换"><!---->线程的6种状态及切换<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/thread-group-and-thread-priority.html" class="nav-link sidebar-link sidebar-page" aria-label="线程组和线程优先级"><!---->线程组和线程优先级<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/why-need-thread.html" class="nav-link sidebar-link sidebar-page" aria-label="进程与线程的区别"><!---->进程与线程的区别<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/thread-bring-some-problem.html" class="nav-link sidebar-link sidebar-page" aria-label="并发编程带来了哪些问题"><!---->并发编程带来了哪些问题<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/jmm.html" class="nav-link sidebar-link sidebar-page" aria-label="Java内存模型"><!---->Java内存模型<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/volatile.html" class="nav-link sidebar-link sidebar-page" aria-label="volatile"><!---->volatile<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/synchronized.html" class="nav-link sidebar-link sidebar-page" aria-label="synchronized"><!---->synchronized<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/cas.html" class="nav-link sidebar-link sidebar-page" aria-label="CAS的原理"><!---->CAS的原理<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/aqs.html" class="nav-link sidebar-link sidebar-page" aria-label="AQS详解"><!---->AQS详解<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/lock.html" class="nav-link sidebar-link sidebar-page" aria-label="锁"><!---->锁<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/reentrantLock.html" class="nav-link sidebar-link sidebar-page" aria-label="重入锁ReentrantLock"><!---->重入锁ReentrantLock<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ReentrantReadWriteLock.html" class="nav-link sidebar-link sidebar-page" aria-label="读写锁ReentrantReadWriteLock"><!---->读写锁ReentrantReadWriteLock<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/condition.html" class="nav-link sidebar-link sidebar-page" aria-label="线程协作类Condition"><!---->线程协作类Condition<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/LockSupport.html" class="nav-link sidebar-link sidebar-page" aria-label="线程阻塞唤醒类LockSupport"><!---->线程阻塞唤醒类LockSupport<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/map.html" class="nav-link sidebar-link sidebar-page" aria-label="并发集合容器"><!---->并发集合容器<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ConcurrentHashMap.html" class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentHashMap"><!---->ConcurrentHashMap<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ConcurrentLinkedQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentLinkedQueue"><!---->ConcurrentLinkedQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CopyOnWriteArrayList.html" class="nav-link sidebar-link sidebar-page" aria-label="CopyOnWriteArrayList"><!---->CopyOnWriteArrayList<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ThreadLocal.html" class="nav-link sidebar-link sidebar-page" aria-label="ThreadLocal"><!---->ThreadLocal<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/BlockingQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="BlockingQueue"><!---->BlockingQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/pool.html" class="nav-link sidebar-link sidebar-page" aria-label="线程池"><!---->线程池<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ScheduledThreadPoolExecutor.html" class="nav-link sidebar-link sidebar-page" aria-label="计划任务"><!---->计划任务<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/atomic.html" class="nav-link sidebar-link sidebar-page" aria-label="原子操作类"><!---->原子操作类<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/thread/CountDownLatch.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="通信工具类CountDownLatch"><!---->通信工具类CountDownLatch<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/CountDownLatch.html#semaphore" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="Semaphore"><!---->Semaphore<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/CountDownLatch.html#semaphore介绍" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="Semaphore介绍"><!---->Semaphore介绍<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/CountDownLatch.html#semaphore案例" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="Semaphore案例"><!---->Semaphore案例<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/CountDownLatch.html#semaphore原理" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="Semaphore原理"><!---->Semaphore原理<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/CountDownLatch.html#exchanger" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="Exchanger"><!---->Exchanger<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/CountDownLatch.html#countdownlatch" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="CountDownLatch"><!---->CountDownLatch<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/CountDownLatch.html#countdownlatch介绍" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="CountDownLatch介绍"><!---->CountDownLatch介绍<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/CountDownLatch.html#countdownlatch案例" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="CountDownLatch案例"><!---->CountDownLatch案例<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/CountDownLatch.html#countdownlatch原理" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="CountDownLatch原理"><!---->CountDownLatch原理<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/CountDownLatch.html#cyclicbarrier" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="CyclicBarrier"><!---->CyclicBarrier<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/CountDownLatch.html#cyclicbarrier介绍" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="CyclicBarrier介绍"><!---->CyclicBarrier介绍<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/CountDownLatch.html#cyclicbarrier-barrier被破坏" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="CyclicBarrier Barrier被破坏"><!---->CyclicBarrier Barrier被破坏<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/CountDownLatch.html#cyclicbarrier案例" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="CyclicBarrier案例"><!---->CyclicBarrier案例<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/CountDownLatch.html#cyclicbarrier原理" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="CyclicBarrier原理"><!---->CyclicBarrier原理<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/CountDownLatch.html#phaser" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="Phaser"><!---->Phaser<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/CountDownLatch.html#phaser介绍" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="Phaser介绍"><!---->Phaser介绍<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/CountDownLatch.html#phaser案例" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="Phaser案例"><!---->Phaser案例<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/CountDownLatch.html#phaser原理" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="Phaser原理"><!---->Phaser原理<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li></ul><!--]--></li><li><!--[--><a href="/thread/fork-join.html" class="nav-link sidebar-link sidebar-page" aria-label="Fork/Join框架"><!---->Fork/Join框架<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/shengchanzhe-xiaofeizhe.html" class="nav-link sidebar-link sidebar-page" aria-label="生产者-消费者模式"><!---->生产者-消费者模式<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java并发编程通信工具类CountDownLatch等一网打尽</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 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aria-current="page" href="/thread/CountDownLatch.html#semaphore原理" class="router-link-active router-link-exact-active toc-link level3">Semaphore原理</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/CountDownLatch.html#exchanger" class="router-link-active router-link-exact-active toc-link level2">Exchanger</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/CountDownLatch.html#countdownlatch" class="router-link-active router-link-exact-active toc-link level2">CountDownLatch</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/CountDownLatch.html#countdownlatch介绍" class="router-link-active router-link-exact-active toc-link level3">CountDownLatch介绍</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/CountDownLatch.html#countdownlatch案例" class="router-link-active router-link-exact-active toc-link level3">CountDownLatch案例</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/CountDownLatch.html#countdownlatch原理" class="router-link-active router-link-exact-active toc-link level3">CountDownLatch原理</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/CountDownLatch.html#cyclicbarrier" class="router-link-active router-link-exact-active toc-link level2">CyclicBarrier</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/CountDownLatch.html#cyclicbarrier介绍" class="router-link-active router-link-exact-active toc-link level3">CyclicBarrier介绍</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/CountDownLatch.html#cyclicbarrier-barrier被破坏" class="router-link-active router-link-exact-active toc-link level3">CyclicBarrier Barrier被破坏</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/CountDownLatch.html#cyclicbarrier案例" class="router-link-active router-link-exact-active toc-link level3">CyclicBarrier案例</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/CountDownLatch.html#cyclicbarrier原理" class="router-link-active router-link-exact-active toc-link level3">CyclicBarrier原理</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/CountDownLatch.html#phaser" class="router-link-active router-link-exact-active toc-link level2">Phaser</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/CountDownLatch.html#phaser介绍" class="router-link-active router-link-exact-active toc-link level3">Phaser介绍</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/CountDownLatch.html#phaser案例" class="router-link-active router-link-exact-active toc-link level3">Phaser案例</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/CountDownLatch.html#phaser原理" class="router-link-active router-link-exact-active toc-link level3">Phaser原理</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><p>JDK中提供了一些工具类以供开发者使用。这样的话我们在遇到一些常见的应用场景时就可以使用这些工具类，而不用自己再重复造轮子了。</p><p>它们都在java.util.concurrent包下。先总体概括一下都有哪些工具类，它们有什么作用，然后再分别介绍它们的主要使用方法和原理。</p><table><thead><tr><th>类</th><th>作用</th></tr></thead><tbody><tr><td>Semaphore</td><td>限制线程的数量</td></tr><tr><td>Exchanger</td><td>两个线程交换数据</td></tr><tr><td>CountDownLatch</td><td>线程等待直到计数器减为0时开始工作</td></tr><tr><td>CyclicBarrier</td><td>作用跟CountDownLatch类似，但是可以重复使用</td></tr><tr><td>Phaser</td><td>增强的CyclicBarrier</td></tr></tbody></table><p>下面分别介绍这几个类。</p><h2 id="semaphore" tabindex="-1"><a class="header-anchor" href="#semaphore" aria-hidden="true">#</a> Semaphore</h2><h3 id="semaphore介绍" tabindex="-1"><a class="header-anchor" href="#semaphore介绍" aria-hidden="true">#</a> Semaphore介绍</h3><p>Semaphore翻译过来是信号的意思。顾名思义，这个工具类提供的功能就是多个线程彼此“打信号”。而这个“信号”是一个<code>int</code>类型的数据，也可以看成是一种“资源”。</p><p>可以在构造函数中传入初始资源总数，以及是否使用“公平”的同步器。默认情况下，是非公平的。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token comment">// 默认情况下使用非公平</span>
 <span class="token keyword">public</span> <span class="token class-name">Semaphore</span><span class="token punctuation">(</span><span class="token keyword">int</span> <span class="token keyword">permits</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
     sync <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">NonfairSync</span><span class="token punctuation">(</span><span class="token keyword">permits</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 <span class="token punctuation">}</span>
@@ -282,6 +282,6 @@
 	<span class="token comment">// 实现代码</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>有兴趣的读者可以去看看JDK源代码，这里不做过多叙述。</p><p>总的来说，CountDownLatch，CyclicBarrier，Phaser是一个比一个强大，但也一个比一个复杂。根据自己的业务需求合理选择即可。</p><hr><blockquote><p>编辑：沉默王二，内容大部分来源以下三个开源仓库：</p><ul><li><a href="http://concurrent.redspider.group/" target="_blank" rel="noopener noreferrer">深入浅出 Java 多线程<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://github.com/CL0610/Java-concurrency" target="_blank" rel="noopener noreferrer">并发编程知识总结<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://github.com/CoderLeixiaoshuai/java-eight-part" target="_blank" rel="noopener noreferrer">Java八股文<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" 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href="/thread/CountDownLatch.html" class="nav-link sidebar-link sidebar-page" aria-label="通信工具类CountDownLatch"><!---->通信工具类CountDownLatch<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/fork-join.html" class="nav-link sidebar-link sidebar-page" aria-label="Fork/Join框架"><!---->Fork/Join框架<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/shengchanzhe-xiaofeizhe.html" class="nav-link sidebar-link sidebar-page" aria-label="生产者-消费者模式"><!---->生产者-消费者模式<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->深入理解Java并发线程阻塞唤醒类LockSupport</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 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106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><li class="category category6" role>并发编程</li><meta property="articleSection" content="Java核心,并发编程"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" 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href="/thread/LockSupport.html#阻塞线程" class="router-link-active router-link-exact-active toc-link level2">阻塞线程</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/LockSupport.html#唤醒线程" class="router-link-active router-link-exact-active toc-link level2">唤醒线程</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="深入理解java并发线程阻塞唤醒类locksupport" tabindex="-1"><a class="header-anchor" href="#深入理解java并发线程阻塞唤醒类locksupport" aria-hidden="true">#</a> 深入理解Java并发线程阻塞唤醒类LockSupport</h1><p>LockSupport位于java.util.concurrent.locks包下，有兴趣的可以直接去看源码，该类的方法并不是很多。LockSupprot是线程的阻塞原语，用来阻塞线程和唤醒线程。每个使用LockSupport的线程都会与一个许可关联，如果该许可可用，并且可在线程中使用，则调用park()将会立即返回，否则可能阻塞。如果许可尚不可用，则可以调用 unpark 使其可用。但是注意许可<strong>不可重入</strong>，也就是说只能调用一次park()方法，否则会一直阻塞。</p><p>LockSupport中的方法不多，这里将这些方法做一个总结：</p><h2 id="阻塞线程" tabindex="-1"><a class="header-anchor" href="#阻塞线程" aria-hidden="true">#</a> <strong>阻塞线程</strong></h2><ol><li><code>void park()</code>：阻塞当前线程，如果调用unpark方法或者当前线程被中断，从能从park()方法中返回</li><li><code>void park(Object blocker)</code>：功能同方法1，入参增加一个Object对象，用来记录导致线程阻塞的阻塞对象，方便进行问题排查；</li><li><code>void parkNanos(long nanos)</code>：阻塞当前线程，最长不超过nanos纳秒，增加了超时返回的特性；</li><li><code>void parkNanos(Object blocker, long nanos)</code>：功能同方法3，入参增加一个Object对象，用来记录导致线程阻塞的阻塞对象，方便进行问题排查；</li><li><code>void parkUntil(long deadline)</code>：阻塞当前线程，知道deadline；</li><li><code>void parkUntil(Object blocker, long deadline)</code>：功能同方法5，入参增加一个Object对象，用来记录导致线程阻塞的阻塞对象，方便进行问题排查；</li></ol><h2 id="唤醒线程" tabindex="-1"><a class="header-anchor" href="#唤醒线程" aria-hidden="true">#</a> <strong>唤醒线程</strong></h2><p><code>void unpark(Thread thread)</code>:唤醒处于阻塞状态的指定线程</p><p>实际上LockSupport阻塞和唤醒线程的功能是依赖于sun.misc.Unsafe，这是一个很底层的类，有兴趣的可以去查阅资料，比如park()方法的功能实现则是靠unsafe.park()方法。</p><p>另外在阻塞线程这一系列方法中还有一个很有意思的现象就是，每个方法都会新增一个带有Object的阻塞对象的重载方法。那么增加了一个Object对象的入参会有什么不同的地方了？示例代码很简单就不说了，直接看dump线程的信息。</p><p><strong>调用park()方法dump线程</strong>：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token string">&quot;main&quot;</span> #<span class="token number">1</span> prio<span class="token operator">=</span><span class="token number">5</span> os_prio<span class="token operator">=</span><span class="token number">0</span> tid<span class="token operator">=</span><span class="token number">0x02cdcc00</span> nid<span class="token operator">=</span><span class="token number">0x2b48</span> waiting on condition <span class="token punctuation">[</span><span class="token number">0x00d6f000</span><span class="token punctuation">]</span>
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class="sidebar-heading clickable"><!----><span class="title">2.6 IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section 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class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/thread-bring-some-problem.html" class="nav-link sidebar-link sidebar-page" aria-label="并发编程带来了哪些问题"><!---->并发编程带来了哪些问题<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/jmm.html" class="nav-link sidebar-link sidebar-page" aria-label="Java内存模型"><!---->Java内存模型<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/volatile.html" class="nav-link sidebar-link sidebar-page" aria-label="volatile"><!---->volatile<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/synchronized.html" class="nav-link sidebar-link sidebar-page" aria-label="synchronized"><!---->synchronized<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/cas.html" class="nav-link sidebar-link sidebar-page" aria-label="CAS的原理"><!---->CAS的原理<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/aqs.html" class="nav-link sidebar-link sidebar-page" aria-label="AQS详解"><!---->AQS详解<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/lock.html" class="nav-link sidebar-link sidebar-page" aria-label="锁"><!---->锁<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/reentrantLock.html" class="nav-link sidebar-link sidebar-page" aria-label="重入锁ReentrantLock"><!---->重入锁ReentrantLock<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ReentrantReadWriteLock.html" class="nav-link sidebar-link sidebar-page" aria-label="读写锁ReentrantReadWriteLock"><!---->读写锁ReentrantReadWriteLock<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/condition.html" class="nav-link sidebar-link sidebar-page" aria-label="线程协作类Condition"><!---->线程协作类Condition<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/thread/LockSupport.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="线程阻塞唤醒类LockSupport"><!---->线程阻塞唤醒类LockSupport<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/LockSupport.html#阻塞线程" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="阻塞线程"><!---->阻塞线程<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/LockSupport.html#唤醒线程" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="唤醒线程"><!---->唤醒线程<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/thread/map.html" class="nav-link sidebar-link sidebar-page" aria-label="并发集合容器"><!---->并发集合容器<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ConcurrentHashMap.html" class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentHashMap"><!---->ConcurrentHashMap<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ConcurrentLinkedQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentLinkedQueue"><!---->ConcurrentLinkedQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CopyOnWriteArrayList.html" class="nav-link sidebar-link sidebar-page" aria-label="CopyOnWriteArrayList"><!---->CopyOnWriteArrayList<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ThreadLocal.html" class="nav-link sidebar-link sidebar-page" aria-label="ThreadLocal"><!---->ThreadLocal<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/BlockingQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="BlockingQueue"><!---->BlockingQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/pool.html" class="nav-link sidebar-link sidebar-page" aria-label="线程池"><!---->线程池<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ScheduledThreadPoolExecutor.html" class="nav-link sidebar-link sidebar-page" aria-label="计划任务"><!---->计划任务<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/atomic.html" class="nav-link sidebar-link sidebar-page" aria-label="原子操作类"><!---->原子操作类<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CountDownLatch.html" class="nav-link sidebar-link sidebar-page" aria-label="通信工具类CountDownLatch"><!---->通信工具类CountDownLatch<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/fork-join.html" class="nav-link sidebar-link sidebar-page" aria-label="Fork/Join框架"><!---->Fork/Join框架<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/shengchanzhe-xiaofeizhe.html" class="nav-link sidebar-link sidebar-page" aria-label="生产者-消费者模式"><!---->生产者-消费者模式<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->深入理解Java并发线程阻塞唤醒类LockSupport</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 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0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><li class="category category6" role>并发编程</li><meta property="articleSection" content="Java核心,并发编程"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 3 分钟</span><meta property="timeRequired" content="PT3M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/LockSupport.html#阻塞线程" class="router-link-active router-link-exact-active toc-link level2">阻塞线程</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/LockSupport.html#唤醒线程" class="router-link-active router-link-exact-active toc-link level2">唤醒线程</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="深入理解java并发线程阻塞唤醒类locksupport" tabindex="-1"><a class="header-anchor" href="#深入理解java并发线程阻塞唤醒类locksupport" aria-hidden="true">#</a> 深入理解Java并发线程阻塞唤醒类LockSupport</h1><p>LockSupport位于java.util.concurrent.locks包下，有兴趣的可以直接去看源码，该类的方法并不是很多。LockSupprot是线程的阻塞原语，用来阻塞线程和唤醒线程。每个使用LockSupport的线程都会与一个许可关联，如果该许可可用，并且可在线程中使用，则调用park()将会立即返回，否则可能阻塞。如果许可尚不可用，则可以调用 unpark 使其可用。但是注意许可<strong>不可重入</strong>，也就是说只能调用一次park()方法，否则会一直阻塞。</p><p>LockSupport中的方法不多，这里将这些方法做一个总结：</p><h2 id="阻塞线程" tabindex="-1"><a class="header-anchor" href="#阻塞线程" aria-hidden="true">#</a> <strong>阻塞线程</strong></h2><ol><li><code>void park()</code>：阻塞当前线程，如果调用unpark方法或者当前线程被中断，从能从park()方法中返回</li><li><code>void park(Object blocker)</code>：功能同方法1，入参增加一个Object对象，用来记录导致线程阻塞的阻塞对象，方便进行问题排查；</li><li><code>void parkNanos(long nanos)</code>：阻塞当前线程，最长不超过nanos纳秒，增加了超时返回的特性；</li><li><code>void parkNanos(Object blocker, long nanos)</code>：功能同方法3，入参增加一个Object对象，用来记录导致线程阻塞的阻塞对象，方便进行问题排查；</li><li><code>void parkUntil(long deadline)</code>：阻塞当前线程，知道deadline；</li><li><code>void parkUntil(Object blocker, long deadline)</code>：功能同方法5，入参增加一个Object对象，用来记录导致线程阻塞的阻塞对象，方便进行问题排查；</li></ol><h2 id="唤醒线程" tabindex="-1"><a class="header-anchor" href="#唤醒线程" aria-hidden="true">#</a> <strong>唤醒线程</strong></h2><p><code>void unpark(Thread thread)</code>:唤醒处于阻塞状态的指定线程</p><p>实际上LockSupport阻塞和唤醒线程的功能是依赖于sun.misc.Unsafe，这是一个很底层的类，有兴趣的可以去查阅资料，比如park()方法的功能实现则是靠unsafe.park()方法。</p><p>另外在阻塞线程这一系列方法中还有一个很有意思的现象就是，每个方法都会新增一个带有Object的阻塞对象的重载方法。那么增加了一个Object对象的入参会有什么不同的地方了？示例代码很简单就不说了，直接看dump线程的信息。</p><p><strong>调用park()方法dump线程</strong>：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token string">&quot;main&quot;</span> #<span class="token number">1</span> prio<span class="token operator">=</span><span class="token number">5</span> os_prio<span class="token operator">=</span><span class="token number">0</span> tid<span class="token operator">=</span><span class="token number">0x02cdcc00</span> nid<span class="token operator">=</span><span class="token number">0x2b48</span> waiting on condition <span class="token punctuation">[</span><span class="token number">0x00d6f000</span><span class="token punctuation">]</span>
    <span class="token class-name"><span class="token namespace">java<span class="token punctuation">.</span>lang<span class="token punctuation">.</span></span>Thread<span class="token punctuation">.</span>State</span><span class="token operator">:</span> WAITING <span class="token punctuation">(</span>parking<span class="token punctuation">)</span>
         at <span class="token class-name"><span class="token namespace">sun<span class="token punctuation">.</span>misc<span class="token punctuation">.</span></span>Unsafe</span><span class="token punctuation">.</span><span class="token function">park</span><span class="token punctuation">(</span><span class="token class-name">Native</span> <span class="token class-name">Method</span><span class="token punctuation">)</span>
         at <span class="token class-name"><span class="token namespace">java<span class="token punctuation">.</span>util<span class="token punctuation">.</span>concurrent<span class="token punctuation">.</span>locks<span class="token punctuation">.</span></span>LockSupport</span><span class="token punctuation">.</span><span class="token function">park</span><span class="token punctuation">(</span><span class="token class-name">LockSupport</span><span class="token punctuation">.</span>java<span class="token operator">:</span><span class="token number">304</span><span class="token punctuation">)</span>
@@ -69,6 +69,6 @@
     <span class="token punctuation">}</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>thread线程调用LockSupport.park()致使thread阻塞，当mian线程睡眠3秒结束后通过LockSupport.unpark(thread)方法唤醒thread线程,thread线程被唤醒执行后续操作。另外，还有一点值得关注的是，<strong><code>LockSupport.unpark(thread)</code>可以指定线程对象唤醒指定的线程</strong>。</p><hr><blockquote><p>编辑：沉默王二，内容大部分来源以下三个开源仓库：</p><ul><li><a href="http://concurrent.redspider.group/" target="_blank" rel="noopener noreferrer">深入浅出 Java 多线程<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" 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class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->深入理解Java并发读写锁ReentrantReadWriteLock</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" 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aria-current="page" href="/thread/ReentrantReadWriteLock.html#读锁详解" class="router-link-active router-link-exact-active toc-link level2">读锁详解</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ReentrantReadWriteLock.html#读锁的获取" class="router-link-active router-link-exact-active toc-link level3">读锁的获取</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ReentrantReadWriteLock.html#读锁的释放" class="router-link-active router-link-exact-active toc-link level3">读锁的释放</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ReentrantReadWriteLock.html#锁降级" class="router-link-active router-link-exact-active toc-link level2">锁降级</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="深入理解java并发读写锁reentrantreadwritelock" tabindex="-1"><a class="header-anchor" href="#深入理解java并发读写锁reentrantreadwritelock" aria-hidden="true">#</a> 深入理解Java并发读写锁ReentrantReadWriteLock</h1><p>在并发场景中用于解决线程安全的问题，我们几乎会高频率的使用到独占式锁，通常使用java提供的关键字synchronized或者concurrents包中实现了Lock接口的ReentrantLock。它们都是独占式获取锁，也就是在同一时刻只有一个线程能够获取锁。</p><p>而在一些业务场景中，大部分只是读数据，写数据很少，如果仅仅是读数据的话并不会影响数据正确性（出现脏读），而如果在这种业务场景下，依然使用独占锁的话，很显然这将是出现性能瓶颈的地方。针对这种读多写少的情况，java还提供了另外一个实现Lock接口的ReentrantReadWriteLock(读写锁)。</p><p><strong>读写锁允许同一时刻被多个读线程访问，但是在写线程访问时，所有的读线程和其他的写线程都会被阻塞</strong>。在分析WirteLock和ReadLock的互斥性时可以按照WriteLock与WriteLock之间，WriteLock与ReadLock之间以及ReadLock与ReadLock之间进行分析。</p><p>更多关于读写锁特性介绍大家可以看源码上的介绍（阅读源码时最好的一种学习方式，我也正在学习中，与大家共勉），这里做一个归纳总结：</p><ol><li><strong>公平性选择</strong>：支持非公平性（默认）和公平的锁获取方式，吞吐量还是非公平优于公平；</li><li><strong>重入性</strong>：支持重入，读锁获取后能再次获取，写锁获取之后能够再次获取写锁，同时也能够获取读锁；</li><li><strong>锁降级</strong>：遵循获取写锁，获取读锁再释放写锁的次序，写锁能够降级成为读锁</li></ol><p>要想能够彻底的理解读写锁必须能够理解这样几个问题：</p><ul><li><ol><li>读写锁是怎样实现分别记录读写状态的？</li></ol></li><li><ol start="2"><li>写锁是怎样获取和释放的？</li></ol></li><li>3.读锁是怎样获取和释放的？</li></ul><p>我们带着这样的三个问题，再去了解下读写锁。</p><h2 id="写锁详解" tabindex="-1"><a class="header-anchor" href="#写锁详解" aria-hidden="true">#</a> 写锁详解</h2><h3 id="写锁的获取" tabindex="-1"><a class="header-anchor" href="#写锁的获取" aria-hidden="true">#</a> 写锁的获取</h3><p>同步组件的实现聚合了同步器（AQS），并通过重写重写同步器（AQS）中的方法实现同步组件的同步语义。因此，写锁的实现依然也是采用这种方式。在同一时刻写锁是不能被多个线程所获取，很显然写锁是独占式锁，而实现写锁的同步语义是通过重写AQS中的tryAcquire方法实现的。源码为:</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">protected</span> <span class="token keyword">final</span> <span class="token keyword">boolean</span> <span class="token function">tryAcquire</span><span class="token punctuation">(</span><span class="token keyword">int</span> acquires<span class="token punctuation">)</span> <span class="token punctuation">{</span>
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class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/aqs.html" class="nav-link sidebar-link sidebar-page" aria-label="AQS详解"><!---->AQS详解<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/lock.html" class="nav-link sidebar-link sidebar-page" aria-label="锁"><!---->锁<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/reentrantLock.html" class="nav-link sidebar-link sidebar-page" aria-label="重入锁ReentrantLock"><!---->重入锁ReentrantLock<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/thread/ReentrantReadWriteLock.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="读写锁ReentrantReadWriteLock"><!---->读写锁ReentrantReadWriteLock<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ReentrantReadWriteLock.html#写锁详解" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="写锁详解"><!---->写锁详解<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ReentrantReadWriteLock.html#写锁的获取" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="写锁的获取"><!---->写锁的获取<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ReentrantReadWriteLock.html#写锁的释放" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="写锁的释放"><!---->写锁的释放<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ReentrantReadWriteLock.html#读锁详解" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="读锁详解"><!---->读锁详解<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a 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class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/LockSupport.html" class="nav-link sidebar-link sidebar-page" aria-label="线程阻塞唤醒类LockSupport"><!---->线程阻塞唤醒类LockSupport<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/map.html" class="nav-link sidebar-link sidebar-page" aria-label="并发集合容器"><!---->并发集合容器<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ConcurrentHashMap.html" class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentHashMap"><!---->ConcurrentHashMap<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ConcurrentLinkedQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentLinkedQueue"><!---->ConcurrentLinkedQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CopyOnWriteArrayList.html" class="nav-link sidebar-link sidebar-page" aria-label="CopyOnWriteArrayList"><!---->CopyOnWriteArrayList<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ThreadLocal.html" class="nav-link sidebar-link sidebar-page" aria-label="ThreadLocal"><!---->ThreadLocal<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/BlockingQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="BlockingQueue"><!---->BlockingQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/pool.html" class="nav-link sidebar-link sidebar-page" aria-label="线程池"><!---->线程池<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ScheduledThreadPoolExecutor.html" class="nav-link sidebar-link sidebar-page" aria-label="计划任务"><!---->计划任务<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/atomic.html" class="nav-link sidebar-link sidebar-page" aria-label="原子操作类"><!---->原子操作类<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CountDownLatch.html" class="nav-link sidebar-link sidebar-page" aria-label="通信工具类CountDownLatch"><!---->通信工具类CountDownLatch<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/fork-join.html" class="nav-link sidebar-link sidebar-page" aria-label="Fork/Join框架"><!---->Fork/Join框架<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/shengchanzhe-xiaofeizhe.html" class="nav-link sidebar-link sidebar-page" aria-label="生产者-消费者模式"><!---->生产者-消费者模式<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->深入理解Java并发读写锁ReentrantReadWriteLock</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月23日</span><meta property="datePublished" content="2022-03-23T12:08:58.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 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class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ReentrantReadWriteLock.html#写锁详解" class="router-link-active router-link-exact-active toc-link level2">写锁详解</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ReentrantReadWriteLock.html#写锁的获取" class="router-link-active router-link-exact-active toc-link level3">写锁的获取</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ReentrantReadWriteLock.html#写锁的释放" class="router-link-active router-link-exact-active toc-link level3">写锁的释放</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ReentrantReadWriteLock.html#读锁详解" class="router-link-active router-link-exact-active toc-link level2">读锁详解</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ReentrantReadWriteLock.html#读锁的获取" class="router-link-active router-link-exact-active toc-link level3">读锁的获取</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ReentrantReadWriteLock.html#读锁的释放" class="router-link-active router-link-exact-active toc-link level3">读锁的释放</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ReentrantReadWriteLock.html#锁降级" class="router-link-active router-link-exact-active toc-link level2">锁降级</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="深入理解java并发读写锁reentrantreadwritelock" tabindex="-1"><a class="header-anchor" href="#深入理解java并发读写锁reentrantreadwritelock" aria-hidden="true">#</a> 深入理解Java并发读写锁ReentrantReadWriteLock</h1><p>在并发场景中用于解决线程安全的问题，我们几乎会高频率的使用到独占式锁，通常使用java提供的关键字synchronized或者concurrents包中实现了Lock接口的ReentrantLock。它们都是独占式获取锁，也就是在同一时刻只有一个线程能够获取锁。</p><p>而在一些业务场景中，大部分只是读数据，写数据很少，如果仅仅是读数据的话并不会影响数据正确性（出现脏读），而如果在这种业务场景下，依然使用独占锁的话，很显然这将是出现性能瓶颈的地方。针对这种读多写少的情况，java还提供了另外一个实现Lock接口的ReentrantReadWriteLock(读写锁)。</p><p><strong>读写锁允许同一时刻被多个读线程访问，但是在写线程访问时，所有的读线程和其他的写线程都会被阻塞</strong>。在分析WirteLock和ReadLock的互斥性时可以按照WriteLock与WriteLock之间，WriteLock与ReadLock之间以及ReadLock与ReadLock之间进行分析。</p><p>更多关于读写锁特性介绍大家可以看源码上的介绍（阅读源码时最好的一种学习方式，我也正在学习中，与大家共勉），这里做一个归纳总结：</p><ol><li><strong>公平性选择</strong>：支持非公平性（默认）和公平的锁获取方式，吞吐量还是非公平优于公平；</li><li><strong>重入性</strong>：支持重入，读锁获取后能再次获取，写锁获取之后能够再次获取写锁，同时也能够获取读锁；</li><li><strong>锁降级</strong>：遵循获取写锁，获取读锁再释放写锁的次序，写锁能够降级成为读锁</li></ol><p>要想能够彻底的理解读写锁必须能够理解这样几个问题：</p><ul><li><ol><li>读写锁是怎样实现分别记录读写状态的？</li></ol></li><li><ol start="2"><li>写锁是怎样获取和释放的？</li></ol></li><li>3.读锁是怎样获取和释放的？</li></ul><p>我们带着这样的三个问题，再去了解下读写锁。</p><h2 id="写锁详解" tabindex="-1"><a class="header-anchor" href="#写锁详解" aria-hidden="true">#</a> 写锁详解</h2><h3 id="写锁的获取" tabindex="-1"><a class="header-anchor" href="#写锁的获取" aria-hidden="true">#</a> 写锁的获取</h3><p>同步组件的实现聚合了同步器（AQS），并通过重写重写同步器（AQS）中的方法实现同步组件的同步语义。因此，写锁的实现依然也是采用这种方式。在同一时刻写锁是不能被多个线程所获取，很显然写锁是独占式锁，而实现写锁的同步语义是通过重写AQS中的tryAcquire方法实现的。源码为:</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">protected</span> <span class="token keyword">final</span> <span class="token keyword">boolean</span> <span class="token function">tryAcquire</span><span class="token punctuation">(</span><span class="token keyword">int</span> acquires<span class="token punctuation">)</span> <span class="token punctuation">{</span>
     <span class="token comment">/*
      * Walkthrough:
      * 1. If read count nonzero or write count nonzero
@@ -199,6 +199,6 @@
   <span class="token punctuation">}</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><hr><blockquote><p>编辑：沉默王二，内容大部分来源以下三个开源仓库：</p><ul><li><a href="http://concurrent.redspider.group/" target="_blank" rel="noopener noreferrer">深入浅出 Java 多线程<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://github.com/CL0610/Java-concurrency" target="_blank" rel="noopener noreferrer">并发编程知识总结<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://github.com/CoderLeixiaoshuai/java-eight-part" target="_blank" rel="noopener noreferrer">Java八股文<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul></blockquote><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png"></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/thread/ReentrantReadWriteLock.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/12 下午4:24:21</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" 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class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentLinkedQueue"><!---->ConcurrentLinkedQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CopyOnWriteArrayList.html" class="nav-link sidebar-link sidebar-page" aria-label="CopyOnWriteArrayList"><!---->CopyOnWriteArrayList<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ThreadLocal.html" class="nav-link sidebar-link sidebar-page" aria-label="ThreadLocal"><!---->ThreadLocal<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/BlockingQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="BlockingQueue"><!---->BlockingQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/pool.html" class="nav-link sidebar-link sidebar-page" aria-label="线程池"><!---->线程池<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/thread/ScheduledThreadPoolExecutor.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="计划任务"><!---->计划任务<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ScheduledThreadPoolExecutor.html#使用案例" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="使用案例"><!---->使用案例<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ScheduledThreadPoolExecutor.html#类结构" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="类结构"><!---->类结构<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ScheduledThreadPoolExecutor.html#主要方法介绍" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="主要方法介绍"><!---->主要方法介绍<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ScheduledThreadPoolExecutor.html#schedule" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="schedule"><!---->schedule<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ScheduledThreadPoolExecutor.html#scheduleatfixedrate" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="scheduleAtFixedRate"><!---->scheduleAtFixedRate<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ScheduledThreadPoolExecutor.html#schedulewithfixeddelay" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="scheduleWithFixedDelay"><!---->scheduleWithFixedDelay<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ScheduledThreadPoolExecutor.html#delayedexecute" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="delayedExecute"><!---->delayedExecute<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ScheduledThreadPoolExecutor.html#delayedworkqueue" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="DelayedWorkQueue"><!---->DelayedWorkQueue<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ScheduledThreadPoolExecutor.html#take" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="take"><!---->take<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ScheduledThreadPoolExecutor.html#offer" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="offer"><!---->offer<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ScheduledThreadPoolExecutor.html#总结" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="总结"><!---->总结<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/thread/atomic.html" class="nav-link sidebar-link sidebar-page" aria-label="原子操作类"><!---->原子操作类<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CountDownLatch.html" class="nav-link sidebar-link sidebar-page" aria-label="通信工具类CountDownLatch"><!---->通信工具类CountDownLatch<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/fork-join.html" class="nav-link sidebar-link sidebar-page" aria-label="Fork/Join框架"><!---->Fork/Join框架<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/shengchanzhe-xiaofeizhe.html" class="nav-link sidebar-link sidebar-page" aria-label="生产者-消费者模式"><!---->生产者-消费者模式<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span 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88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 14 分钟</span><meta property="timeRequired" content="PT14M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ScheduledThreadPoolExecutor.html#使用案例" class="router-link-active router-link-exact-active toc-link level2">使用案例</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ScheduledThreadPoolExecutor.html#类结构" class="router-link-active router-link-exact-active toc-link level2">类结构</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ScheduledThreadPoolExecutor.html#主要方法介绍" class="router-link-active router-link-exact-active toc-link level2">主要方法介绍</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ScheduledThreadPoolExecutor.html#schedule" class="router-link-active router-link-exact-active toc-link level3">schedule</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ScheduledThreadPoolExecutor.html#scheduleatfixedrate" class="router-link-active router-link-exact-active toc-link level3">scheduleAtFixedRate</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ScheduledThreadPoolExecutor.html#schedulewithfixeddelay" class="router-link-active router-link-exact-active toc-link level3">scheduleWithFixedDelay</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ScheduledThreadPoolExecutor.html#delayedexecute" class="router-link-active router-link-exact-active toc-link level3">delayedExecute</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ScheduledThreadPoolExecutor.html#delayedworkqueue" class="router-link-active router-link-exact-active toc-link level2">DelayedWorkQueue</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ScheduledThreadPoolExecutor.html#take" class="router-link-active router-link-exact-active toc-link level3">take</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ScheduledThreadPoolExecutor.html#offer" class="router-link-active router-link-exact-active toc-link level3">offer</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ScheduledThreadPoolExecutor.html#总结" class="router-link-active router-link-exact-active toc-link level2">总结</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><p>自JDK 1.5 开始，JDK提供了<code>ScheduledThreadPoolExecutor</code>类用于计划任务（又称定时任务），这个类有两个用途：</p><ul><li>在给定的延迟之后运行任务</li><li>周期性重复执行任务</li></ul><p>在这之前，是使用<code>Timer</code>类来完成定时任务的，但是<code>Timer</code>有缺陷：</p><ul><li>Timer是<strong>单线程</strong>模式；</li><li>如果在执行任务期间某个TimerTask耗时较久，那么就会影响其它任务的调度；</li><li>Timer的任务调度是基于绝对时间的，对<strong>系统时间</strong>敏感；</li><li>Timer不会捕获执行TimerTask时所抛出的<strong>异常</strong>，由于Timer是单线程，所以一旦出现异常，则线程就会终止，其他任务也得不到执行。</li></ul><p>所以JDK 1.5之后，大家就摒弃<code>Timer</code>,使用<code>ScheduledThreadPoolExecutor</code>吧。</p><h2 id="使用案例" tabindex="-1"><a class="header-anchor" href="#使用案例" aria-hidden="true">#</a> 使用案例</h2><p>假设我有一个需求，指定时间给大家发送消息。那么我们会将消息（包含发送时间）存储在数据库中，然后想用一个定时任务，每隔1秒检查数据库在当前时间有没有需要发送的消息，那这个计划任务怎么写？下面是一个Demo:</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">ThreadPool</span> <span class="token punctuation">{</span>
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clickable"><!----><span class="title">2.1 Java概述</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.2 Java基础语法</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.3 面向对象编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.4 字符串&amp;数组</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.5 集合框架（容器）</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.6 IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">2.11 并发编程</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/thread/wangzhe-thread.html" class="nav-link sidebar-link sidebar-page" aria-label="创建Java线程的3种方式"><!---->创建Java线程的3种方式<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/thread-state-and-method.html" class="nav-link sidebar-link sidebar-page" aria-label="线程的6种状态及切换"><!---->线程的6种状态及切换<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/thread-group-and-thread-priority.html" class="nav-link sidebar-link sidebar-page" aria-label="线程组和线程优先级"><!---->线程组和线程优先级<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/why-need-thread.html" class="nav-link sidebar-link sidebar-page" aria-label="进程与线程的区别"><!---->进程与线程的区别<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/thread-bring-some-problem.html" class="nav-link sidebar-link sidebar-page" aria-label="并发编程带来了哪些问题"><!---->并发编程带来了哪些问题<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/jmm.html" class="nav-link sidebar-link sidebar-page" aria-label="Java内存模型"><!---->Java内存模型<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/volatile.html" class="nav-link sidebar-link sidebar-page" aria-label="volatile"><!---->volatile<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/synchronized.html" class="nav-link sidebar-link sidebar-page" aria-label="synchronized"><!---->synchronized<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/cas.html" class="nav-link sidebar-link sidebar-page" aria-label="CAS的原理"><!---->CAS的原理<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/aqs.html" class="nav-link sidebar-link sidebar-page" aria-label="AQS详解"><!---->AQS详解<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/lock.html" class="nav-link sidebar-link sidebar-page" aria-label="锁"><!---->锁<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/reentrantLock.html" class="nav-link sidebar-link sidebar-page" aria-label="重入锁ReentrantLock"><!---->重入锁ReentrantLock<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ReentrantReadWriteLock.html" class="nav-link sidebar-link sidebar-page" aria-label="读写锁ReentrantReadWriteLock"><!---->读写锁ReentrantReadWriteLock<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/condition.html" class="nav-link sidebar-link sidebar-page" aria-label="线程协作类Condition"><!---->线程协作类Condition<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/LockSupport.html" class="nav-link sidebar-link sidebar-page" aria-label="线程阻塞唤醒类LockSupport"><!---->线程阻塞唤醒类LockSupport<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/map.html" class="nav-link sidebar-link sidebar-page" aria-label="并发集合容器"><!---->并发集合容器<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ConcurrentHashMap.html" class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentHashMap"><!---->ConcurrentHashMap<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ConcurrentLinkedQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentLinkedQueue"><!---->ConcurrentLinkedQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CopyOnWriteArrayList.html" class="nav-link sidebar-link sidebar-page" aria-label="CopyOnWriteArrayList"><!---->CopyOnWriteArrayList<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ThreadLocal.html" class="nav-link sidebar-link sidebar-page" aria-label="ThreadLocal"><!---->ThreadLocal<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/BlockingQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="BlockingQueue"><!---->BlockingQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/pool.html" class="nav-link sidebar-link sidebar-page" aria-label="线程池"><!---->线程池<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/thread/ScheduledThreadPoolExecutor.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="计划任务"><!---->计划任务<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ScheduledThreadPoolExecutor.html#使用案例" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="使用案例"><!---->使用案例<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ScheduledThreadPoolExecutor.html#类结构" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="类结构"><!---->类结构<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ScheduledThreadPoolExecutor.html#主要方法介绍" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="主要方法介绍"><!---->主要方法介绍<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ScheduledThreadPoolExecutor.html#schedule" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="schedule"><!---->schedule<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ScheduledThreadPoolExecutor.html#scheduleatfixedrate" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="scheduleAtFixedRate"><!---->scheduleAtFixedRate<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ScheduledThreadPoolExecutor.html#schedulewithfixeddelay" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="scheduleWithFixedDelay"><!---->scheduleWithFixedDelay<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ScheduledThreadPoolExecutor.html#delayedexecute" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="delayedExecute"><!---->delayedExecute<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ScheduledThreadPoolExecutor.html#delayedworkqueue" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="DelayedWorkQueue"><!---->DelayedWorkQueue<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ScheduledThreadPoolExecutor.html#take" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="take"><!---->take<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ScheduledThreadPoolExecutor.html#offer" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="offer"><!---->offer<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ScheduledThreadPoolExecutor.html#总结" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="总结"><!---->总结<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/thread/atomic.html" class="nav-link sidebar-link sidebar-page" aria-label="原子操作类"><!---->原子操作类<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CountDownLatch.html" class="nav-link sidebar-link sidebar-page" aria-label="通信工具类CountDownLatch"><!---->通信工具类CountDownLatch<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/fork-join.html" class="nav-link sidebar-link sidebar-page" aria-label="Fork/Join框架"><!---->Fork/Join框架<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/shengchanzhe-xiaofeizhe.html" class="nav-link sidebar-link sidebar-page" aria-label="生产者-消费者模式"><!---->生产者-消费者模式<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->深入剖析Java计划任务ScheduledThreadPoolExecutor</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月23日</span><meta property="datePublished" content="2022-03-23T12:08:58.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><li class="category category6" role>并发编程</li><meta property="articleSection" content="Java核心,并发编程"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 14 分钟</span><meta property="timeRequired" content="PT14M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ScheduledThreadPoolExecutor.html#使用案例" class="router-link-active router-link-exact-active toc-link level2">使用案例</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ScheduledThreadPoolExecutor.html#类结构" class="router-link-active router-link-exact-active toc-link level2">类结构</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ScheduledThreadPoolExecutor.html#主要方法介绍" class="router-link-active router-link-exact-active toc-link level2">主要方法介绍</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ScheduledThreadPoolExecutor.html#schedule" class="router-link-active router-link-exact-active toc-link level3">schedule</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ScheduledThreadPoolExecutor.html#scheduleatfixedrate" class="router-link-active router-link-exact-active toc-link level3">scheduleAtFixedRate</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ScheduledThreadPoolExecutor.html#schedulewithfixeddelay" class="router-link-active router-link-exact-active toc-link level3">scheduleWithFixedDelay</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ScheduledThreadPoolExecutor.html#delayedexecute" class="router-link-active router-link-exact-active toc-link level3">delayedExecute</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ScheduledThreadPoolExecutor.html#delayedworkqueue" class="router-link-active router-link-exact-active toc-link level2">DelayedWorkQueue</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ScheduledThreadPoolExecutor.html#take" class="router-link-active router-link-exact-active toc-link level3">take</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ScheduledThreadPoolExecutor.html#offer" class="router-link-active router-link-exact-active toc-link level3">offer</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ScheduledThreadPoolExecutor.html#总结" class="router-link-active router-link-exact-active toc-link level2">总结</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><p>自JDK 1.5 开始，JDK提供了<code>ScheduledThreadPoolExecutor</code>类用于计划任务（又称定时任务），这个类有两个用途：</p><ul><li>在给定的延迟之后运行任务</li><li>周期性重复执行任务</li></ul><p>在这之前，是使用<code>Timer</code>类来完成定时任务的，但是<code>Timer</code>有缺陷：</p><ul><li>Timer是<strong>单线程</strong>模式；</li><li>如果在执行任务期间某个TimerTask耗时较久，那么就会影响其它任务的调度；</li><li>Timer的任务调度是基于绝对时间的，对<strong>系统时间</strong>敏感；</li><li>Timer不会捕获执行TimerTask时所抛出的<strong>异常</strong>，由于Timer是单线程，所以一旦出现异常，则线程就会终止，其他任务也得不到执行。</li></ul><p>所以JDK 1.5之后，大家就摒弃<code>Timer</code>,使用<code>ScheduledThreadPoolExecutor</code>吧。</p><h2 id="使用案例" tabindex="-1"><a class="header-anchor" href="#使用案例" aria-hidden="true">#</a> 使用案例</h2><p>假设我有一个需求，指定时间给大家发送消息。那么我们会将消息（包含发送时间）存储在数据库中，然后想用一个定时任务，每隔1秒检查数据库在当前时间有没有需要发送的消息，那这个计划任务怎么写？下面是一个Demo:</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">ThreadPool</span> <span class="token punctuation">{</span>
     
     <span class="token keyword">private</span> <span class="token keyword">static</span> <span class="token keyword">final</span> <span class="token class-name">ScheduledExecutorService</span> executor <span class="token operator">=</span> <span class="token keyword">new</span>
         <span class="token class-name">ScheduledThreadPoolExecutor</span><span class="token punctuation">(</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token class-name">Executors</span><span class="token punctuation">.</span><span class="token function">defaultThreadFactory</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
@@ -333,6 +333,6 @@
     <span class="token keyword">return</span> <span class="token boolean">true</span><span class="token punctuation">;</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>在堆中插入了一个节点，这个时候堆有可能不满足最小堆的定义，<code>siftUp</code>用于将堆调整为最小堆，这属于数据结构的基本内容，本文不做介绍。</p><h2 id="总结" tabindex="-1"><a class="header-anchor" href="#总结" aria-hidden="true">#</a> 总结</h2><p>内部使用优化的DelayQueue来实现，由于使用队列来实现定时器，有出入队调整堆等操作，所以定时并不是非常非常精确。</p><hr><blockquote><p>编辑：沉默王二，内容大部分来源以下三个开源仓库：</p><ul><li><a href="http://concurrent.redspider.group/" target="_blank" rel="noopener noreferrer">深入浅出 Java 多线程<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a 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aria-label="一、前言"><!---->一、前言<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">二、Java核心</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.1 Java概述</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.2 Java基础语法</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.3 面向对象编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.4 字符串&amp;数组</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.5 集合框架（容器）</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.6 IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">2.11 并发编程</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/thread/wangzhe-thread.html" class="nav-link sidebar-link sidebar-page" aria-label="创建Java线程的3种方式"><!---->创建Java线程的3种方式<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/thread-state-and-method.html" class="nav-link sidebar-link sidebar-page" aria-label="线程的6种状态及切换"><!---->线程的6种状态及切换<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/thread-group-and-thread-priority.html" class="nav-link sidebar-link sidebar-page" aria-label="线程组和线程优先级"><!---->线程组和线程优先级<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/why-need-thread.html" class="nav-link sidebar-link sidebar-page" aria-label="进程与线程的区别"><!---->进程与线程的区别<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/thread-bring-some-problem.html" class="nav-link sidebar-link sidebar-page" aria-label="并发编程带来了哪些问题"><!---->并发编程带来了哪些问题<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/jmm.html" class="nav-link sidebar-link sidebar-page" aria-label="Java内存模型"><!---->Java内存模型<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/volatile.html" class="nav-link sidebar-link sidebar-page" aria-label="volatile"><!---->volatile<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/synchronized.html" class="nav-link sidebar-link sidebar-page" aria-label="synchronized"><!---->synchronized<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/cas.html" class="nav-link sidebar-link sidebar-page" aria-label="CAS的原理"><!---->CAS的原理<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/aqs.html" class="nav-link sidebar-link sidebar-page" aria-label="AQS详解"><!---->AQS详解<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/lock.html" class="nav-link sidebar-link sidebar-page" aria-label="锁"><!---->锁<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/reentrantLock.html" class="nav-link sidebar-link sidebar-page" aria-label="重入锁ReentrantLock"><!---->重入锁ReentrantLock<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ReentrantReadWriteLock.html" class="nav-link sidebar-link sidebar-page" aria-label="读写锁ReentrantReadWriteLock"><!---->读写锁ReentrantReadWriteLock<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/condition.html" class="nav-link sidebar-link sidebar-page" aria-label="线程协作类Condition"><!---->线程协作类Condition<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/LockSupport.html" class="nav-link sidebar-link sidebar-page" aria-label="线程阻塞唤醒类LockSupport"><!---->线程阻塞唤醒类LockSupport<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/map.html" class="nav-link sidebar-link sidebar-page" aria-label="并发集合容器"><!---->并发集合容器<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ConcurrentHashMap.html" class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentHashMap"><!---->ConcurrentHashMap<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ConcurrentLinkedQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentLinkedQueue"><!---->ConcurrentLinkedQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CopyOnWriteArrayList.html" class="nav-link sidebar-link sidebar-page" aria-label="CopyOnWriteArrayList"><!---->CopyOnWriteArrayList<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/thread/ThreadLocal.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="ThreadLocal"><!---->ThreadLocal<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ThreadLocal.html#threadlocal的简介" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="ThreadLocal的简介"><!---->ThreadLocal的简介<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ThreadLocal.html#threadlocal的实现原理" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="ThreadLocal的实现原理"><!---->ThreadLocal的实现原理<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ThreadLocal.html#void-set-t-value" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="void set(T value)"><!---->void set(T value)<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ThreadLocal.html#void-remove" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="void remove()"><!---->void remove()<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ThreadLocal.html#threadlocalmap详解" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="ThreadLocalMap详解"><!---->ThreadLocalMap详解<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ThreadLocal.html#entry数据结构" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="Entry数据结构"><!---->Entry数据结构<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ThreadLocal.html#set方法" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="set方法"><!---->set方法<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ThreadLocal.html#getentry方法" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="getEntry方法"><!---->getEntry方法<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ThreadLocal.html#remove" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="remove"><!---->remove<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ThreadLocal.html#threadlocal的使用场景" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="ThreadLocal的使用场景"><!---->ThreadLocal的使用场景<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/thread/BlockingQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="BlockingQueue"><!---->BlockingQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/pool.html" class="nav-link sidebar-link sidebar-page" aria-label="线程池"><!---->线程池<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ScheduledThreadPoolExecutor.html" class="nav-link sidebar-link sidebar-page" aria-label="计划任务"><!---->计划任务<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/atomic.html" class="nav-link sidebar-link sidebar-page" aria-label="原子操作类"><!---->原子操作类<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CountDownLatch.html" class="nav-link sidebar-link sidebar-page" aria-label="通信工具类CountDownLatch"><!---->通信工具类CountDownLatch<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/fork-join.html" class="nav-link sidebar-link sidebar-page" aria-label="Fork/Join框架"><!---->Fork/Join框架<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/shengchanzhe-xiaofeizhe.html" class="nav-link sidebar-link sidebar-page" aria-label="生产者-消费者模式"><!---->生产者-消费者模式<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->吊打Java并发面试官之ThreadLocal</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月23日</span><meta property="datePublished" content="2022-03-23T12:08:58.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><li class="category category6" role>并发编程</li><meta property="articleSection" 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content="PT17M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ThreadLocal.html#threadlocal的简介" class="router-link-active router-link-exact-active toc-link level2">ThreadLocal的简介</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ThreadLocal.html#threadlocal的实现原理" class="router-link-active router-link-exact-active toc-link level2">ThreadLocal的实现原理</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ThreadLocal.html#void-set-t-value" class="router-link-active router-link-exact-active toc-link level3">void set(T value)</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ThreadLocal.html#void-remove" class="router-link-active router-link-exact-active toc-link level3">void remove()</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ThreadLocal.html#threadlocalmap详解" class="router-link-active router-link-exact-active toc-link level2">ThreadLocalMap详解</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ThreadLocal.html#entry数据结构" class="router-link-active router-link-exact-active toc-link level3">Entry数据结构</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ThreadLocal.html#set方法" class="router-link-active router-link-exact-active toc-link level3">set方法</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ThreadLocal.html#getentry方法" class="router-link-active router-link-exact-active toc-link level3">getEntry方法</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ThreadLocal.html#remove" class="router-link-active router-link-exact-active toc-link level3">remove</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ThreadLocal.html#threadlocal的使用场景" class="router-link-active router-link-exact-active toc-link level2">ThreadLocal的使用场景</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h2 id="threadlocal的简介" tabindex="-1"><a class="header-anchor" href="#threadlocal的简介" aria-hidden="true">#</a> ThreadLocal的简介</h2><p>在多线程编程中通常解决线程安全的问题我们会利用synchronzed或者lock控制线程对临界区资源的同步顺序从而解决线程安全的问题，但是这种加锁的方式会让未获取到锁的线程进行阻塞等待，很显然这种方式的时间效率并不是很好。</p><p><strong>线程安全问题的核心在于多个线程会对同一个临界区共享资源进行操作</strong>，那么，如果每个线程都使用自己的“共享资源”，各自使用各自的，又互相不影响到彼此即让多个线程间达到隔离的状态，这样就不会出现线程安全的问题。</p><p>事实上，这就是一种“<strong>空间换时间</strong>”的方案，每个线程都会都拥有自己的“共享资源”无疑内存会大很多，但是由于不需要同步也就减少了线程可能存在的阻塞等待的情况从而提高的时间效率。</p><p>虽然ThreadLocal并不在java.util.concurrent包中而在java.lang包中，但我更倾向于把它当作是一种并发容器（虽然真正存放数据的是ThreadLoclMap）进行归类。</p><p>从<strong>ThreadLocal这个类名可以顾名思义的进行理解，表示线程的“本地变量”，即每个线程都拥有该变量副本，达到人手一份的效果，各用各的这样就可以避免共享资源的竞争</strong>。</p><h2 id="threadlocal的实现原理" tabindex="-1"><a class="header-anchor" href="#threadlocal的实现原理" aria-hidden="true">#</a> ThreadLocal的实现原理</h2><p>要想学习到ThreadLocal的实现原理，就必须了解它的几个核心方法，包括怎样存怎样取等等，下面我们一个个来看。</p><h3 id="void-set-t-value" tabindex="-1"><a class="header-anchor" href="#void-set-t-value" aria-hidden="true">#</a> <code>void set(T value)</code></h3><p><strong>set方法设置在当前线程中threadLocal变量的值</strong>，该方法的源码为：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">set</span><span class="token punctuation">(</span><span class="token class-name">T</span> value<span class="token punctuation">)</span> <span class="token punctuation">{</span>
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class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/LockSupport.html" class="nav-link sidebar-link sidebar-page" aria-label="线程阻塞唤醒类LockSupport"><!---->线程阻塞唤醒类LockSupport<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/map.html" class="nav-link sidebar-link sidebar-page" aria-label="并发集合容器"><!---->并发集合容器<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ConcurrentHashMap.html" class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentHashMap"><!---->ConcurrentHashMap<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ConcurrentLinkedQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentLinkedQueue"><!---->ConcurrentLinkedQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CopyOnWriteArrayList.html" class="nav-link sidebar-link sidebar-page" aria-label="CopyOnWriteArrayList"><!---->CopyOnWriteArrayList<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/thread/ThreadLocal.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="ThreadLocal"><!---->ThreadLocal<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ThreadLocal.html#threadlocal的简介" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="ThreadLocal的简介"><!---->ThreadLocal的简介<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ThreadLocal.html#threadlocal的实现原理" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="ThreadLocal的实现原理"><!---->ThreadLocal的实现原理<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ThreadLocal.html#void-set-t-value" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="void set(T value)"><!---->void set(T value)<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ThreadLocal.html#void-remove" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="void remove()"><!---->void remove()<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ThreadLocal.html#threadlocalmap详解" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="ThreadLocalMap详解"><!---->ThreadLocalMap详解<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ThreadLocal.html#entry数据结构" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="Entry数据结构"><!---->Entry数据结构<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ThreadLocal.html#set方法" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="set方法"><!---->set方法<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ThreadLocal.html#getentry方法" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="getEntry方法"><!---->getEntry方法<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ThreadLocal.html#remove" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="remove"><!---->remove<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/ThreadLocal.html#threadlocal的使用场景" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="ThreadLocal的使用场景"><!---->ThreadLocal的使用场景<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/thread/BlockingQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="BlockingQueue"><!---->BlockingQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/pool.html" class="nav-link sidebar-link sidebar-page" aria-label="线程池"><!---->线程池<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ScheduledThreadPoolExecutor.html" class="nav-link sidebar-link sidebar-page" aria-label="计划任务"><!---->计划任务<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/atomic.html" class="nav-link sidebar-link sidebar-page" aria-label="原子操作类"><!---->原子操作类<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CountDownLatch.html" class="nav-link sidebar-link sidebar-page" aria-label="通信工具类CountDownLatch"><!---->通信工具类CountDownLatch<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/fork-join.html" class="nav-link sidebar-link sidebar-page" aria-label="Fork/Join框架"><!---->Fork/Join框架<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/shengchanzhe-xiaofeizhe.html" class="nav-link sidebar-link sidebar-page" aria-label="生产者-消费者模式"><!---->生产者-消费者模式<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->吊打Java并发面试官之ThreadLocal</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月23日</span><meta property="datePublished" content="2022-03-23T12:08:58.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><li class="category category6" role>并发编程</li><meta property="articleSection" content="Java核心,并发编程"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 17 分钟</span><meta property="timeRequired" content="PT17M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ThreadLocal.html#threadlocal的简介" class="router-link-active router-link-exact-active toc-link level2">ThreadLocal的简介</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ThreadLocal.html#threadlocal的实现原理" class="router-link-active router-link-exact-active toc-link level2">ThreadLocal的实现原理</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ThreadLocal.html#void-set-t-value" class="router-link-active router-link-exact-active toc-link level3">void set(T value)</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ThreadLocal.html#void-remove" class="router-link-active router-link-exact-active toc-link level3">void remove()</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ThreadLocal.html#threadlocalmap详解" class="router-link-active router-link-exact-active toc-link level2">ThreadLocalMap详解</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ThreadLocal.html#entry数据结构" class="router-link-active router-link-exact-active toc-link level3">Entry数据结构</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ThreadLocal.html#set方法" class="router-link-active router-link-exact-active toc-link level3">set方法</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ThreadLocal.html#getentry方法" class="router-link-active router-link-exact-active toc-link level3">getEntry方法</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ThreadLocal.html#remove" class="router-link-active router-link-exact-active toc-link level3">remove</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ThreadLocal.html#threadlocal的使用场景" class="router-link-active router-link-exact-active toc-link level2">ThreadLocal的使用场景</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h2 id="threadlocal的简介" tabindex="-1"><a class="header-anchor" href="#threadlocal的简介" aria-hidden="true">#</a> ThreadLocal的简介</h2><p>在多线程编程中通常解决线程安全的问题我们会利用synchronzed或者lock控制线程对临界区资源的同步顺序从而解决线程安全的问题，但是这种加锁的方式会让未获取到锁的线程进行阻塞等待，很显然这种方式的时间效率并不是很好。</p><p><strong>线程安全问题的核心在于多个线程会对同一个临界区共享资源进行操作</strong>，那么，如果每个线程都使用自己的“共享资源”，各自使用各自的，又互相不影响到彼此即让多个线程间达到隔离的状态，这样就不会出现线程安全的问题。</p><p>事实上，这就是一种“<strong>空间换时间</strong>”的方案，每个线程都会都拥有自己的“共享资源”无疑内存会大很多，但是由于不需要同步也就减少了线程可能存在的阻塞等待的情况从而提高的时间效率。</p><p>虽然ThreadLocal并不在java.util.concurrent包中而在java.lang包中，但我更倾向于把它当作是一种并发容器（虽然真正存放数据的是ThreadLoclMap）进行归类。</p><p>从<strong>ThreadLocal这个类名可以顾名思义的进行理解，表示线程的“本地变量”，即每个线程都拥有该变量副本，达到人手一份的效果，各用各的这样就可以避免共享资源的竞争</strong>。</p><h2 id="threadlocal的实现原理" tabindex="-1"><a class="header-anchor" href="#threadlocal的实现原理" aria-hidden="true">#</a> ThreadLocal的实现原理</h2><p>要想学习到ThreadLocal的实现原理，就必须了解它的几个核心方法，包括怎样存怎样取等等，下面我们一个个来看。</p><h3 id="void-set-t-value" tabindex="-1"><a class="header-anchor" href="#void-set-t-value" aria-hidden="true">#</a> <code>void set(T value)</code></h3><p><strong>set方法设置在当前线程中threadLocal变量的值</strong>，该方法的源码为：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">set</span><span class="token punctuation">(</span><span class="token class-name">T</span> value<span class="token punctuation">)</span> <span class="token punctuation">{</span>
 	  <span class="token comment">//1. 获取当前线程实例对象</span>
     <span class="token class-name">Thread</span> t <span class="token operator">=</span> <span class="token class-name">Thread</span><span class="token punctuation">.</span><span class="token function">currentThread</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 
@@ -302,6 +302,6 @@
     <span class="token punctuation">}</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><ol><li>如果当前线程不持有SimpleDateformat对象实例，那么就新建一个并把它设置到当前线程中，如果已经持有，就直接使用。另外，<strong>从<code> if (sdf.get() == null){....}else{.....}</code>可以看出为每一个线程分配一个SimpleDateformat对象实例是从应用层面（业务代码逻辑）去保证的。</strong></li><li>在上面我们说过threadLocal有可能存在内存泄漏，在使用完之后，最好使用remove方法将这个变量移除，就像在使用数据库连接一样，及时关闭连接。</li></ol><hr><blockquote><p>编辑：沉默王二，内容大部分来源以下三个开源仓库：</p><ul><li><a href="http://concurrent.redspider.group/" target="_blank" rel="noopener noreferrer">深入浅出 Java 多线程<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://github.com/CL0610/Java-concurrency" target="_blank" rel="noopener noreferrer">并发编程知识总结<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://github.com/CoderLeixiaoshuai/java-eight-part" target="_blank" rel="noopener noreferrer">Java八股文<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" 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15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 7 分钟</span><meta property="timeRequired" content="PT7M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ali-executors.html#一、线程池的定义" class="router-link-active router-link-exact-active toc-link level3">一、线程池的定义</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ali-executors.html#二、threadpoolexecutor-对象" class="router-link-active router-link-exact-active toc-link level3">二、ThreadPoolExecutor 对象</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ali-executors.html#三、总结" class="router-link-active router-link-exact-active toc-link level3">三、总结：</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ali-executors.html#四、如何定义线程池参数" class="router-link-active router-link-exact-active toc-link level3">四、如何定义线程池参数</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="为什么阿里巴巴要禁用executors创建线程池" tabindex="-1"><a class="header-anchor" href="#为什么阿里巴巴要禁用executors创建线程池" aria-hidden="true">#</a> 为什么阿里巴巴要禁用Executors创建线程池？</h1><p>看阿里巴巴开发手册并发编程这块有一条：<strong>线程池不允许使用 Executors 去创建，而是通过 ThreadPoolExecutor 的方式</strong>，今天我们来通过源码分析一下禁用的原因。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/ali-executors-1.png" alt=""></p><p>通过阅读本篇文章你将了解到：</p><ul><li>线程池的定义</li><li>Executors 创建线程池的几种方式</li><li>ThreadPoolExecutor 对象</li><li>线程池执行任务逻辑和线程池参数的关系</li><li>Executors 创建返回 ThreadPoolExecutor 对象</li><li>OOM 异常测试</li><li>如何定义线程池参数</li></ul><p>如果只想知道原因可以直接拉到文末总结那。</p><h3 id="一、线程池的定义" tabindex="-1"><a class="header-anchor" href="#一、线程池的定义" aria-hidden="true">#</a> 一、线程池的定义</h3><p>管理一组工作线程。通过线程池复用线程有以下几点优点：</p><ul><li>减少资源创建 =&gt; 减少内存开销，创建线程占用内存</li><li>降低系统开销 =&gt; 创建线程需要时间，会延迟处理的请求</li><li>提高稳定稳定性 =&gt; 避免无限创建线程引起的 OutOfMemoryError【简称 OOM】</li></ul><p>Executors 创建线程池的方式，根据返回的对象类型创建线程池可以分为三类：</p><ul><li>创建返回 ThreadPoolExecutor 对象</li><li>创建返回 ScheduleThreadPoolExecutor 对象</li><li>创建返回 ForkJoinPool 对象</li></ul><p>本文只讨论创建返回 ThreadPoolExecutor 对象。</p><h3 id="二、threadpoolexecutor-对象" tabindex="-1"><a class="header-anchor" href="#二、threadpoolexecutor-对象" aria-hidden="true">#</a> 二、ThreadPoolExecutor 对象</h3><p>在介绍 Executors 创建线程池方法前先介绍一下 ThreadPoolExecutor，因为这些创建线程池的静态方法都是返回 ThreadPoolExecutor 对象，和我们手动创建 ThreadPoolExecutor 对象的区别就是我们不需要自己传构造方法的参数。</p><p>ThreadPoolExecutor 的构造方法共有四个，但最终调用的都是同一个：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token class-name">ThreadPoolExecutor</span><span class="token punctuation">(</span><span class="token keyword">int</span> corePoolSize<span class="token punctuation">,</span>
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class="router-link-active router-link-exact-active toc-link level3">一、线程池的定义</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ali-executors.html#二、threadpoolexecutor-对象" class="router-link-active router-link-exact-active toc-link level3">二、ThreadPoolExecutor 对象</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ali-executors.html#三、总结" class="router-link-active router-link-exact-active toc-link level3">三、总结：</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/ali-executors.html#四、如何定义线程池参数" class="router-link-active router-link-exact-active toc-link level3">四、如何定义线程池参数</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="为什么阿里巴巴要禁用executors创建线程池" tabindex="-1"><a class="header-anchor" href="#为什么阿里巴巴要禁用executors创建线程池" aria-hidden="true">#</a> 为什么阿里巴巴要禁用Executors创建线程池？</h1><p>看阿里巴巴开发手册并发编程这块有一条：<strong>线程池不允许使用 Executors 去创建，而是通过 ThreadPoolExecutor 的方式</strong>，今天我们来通过源码分析一下禁用的原因。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/ali-executors-1.png" alt=""></p><p>通过阅读本篇文章你将了解到：</p><ul><li>线程池的定义</li><li>Executors 创建线程池的几种方式</li><li>ThreadPoolExecutor 对象</li><li>线程池执行任务逻辑和线程池参数的关系</li><li>Executors 创建返回 ThreadPoolExecutor 对象</li><li>OOM 异常测试</li><li>如何定义线程池参数</li></ul><p>如果只想知道原因可以直接拉到文末总结那。</p><h3 id="一、线程池的定义" tabindex="-1"><a class="header-anchor" href="#一、线程池的定义" aria-hidden="true">#</a> 一、线程池的定义</h3><p>管理一组工作线程。通过线程池复用线程有以下几点优点：</p><ul><li>减少资源创建 =&gt; 减少内存开销，创建线程占用内存</li><li>降低系统开销 =&gt; 创建线程需要时间，会延迟处理的请求</li><li>提高稳定稳定性 =&gt; 避免无限创建线程引起的 OutOfMemoryError【简称 OOM】</li></ul><p>Executors 创建线程池的方式，根据返回的对象类型创建线程池可以分为三类：</p><ul><li>创建返回 ThreadPoolExecutor 对象</li><li>创建返回 ScheduleThreadPoolExecutor 对象</li><li>创建返回 ForkJoinPool 对象</li></ul><p>本文只讨论创建返回 ThreadPoolExecutor 对象。</p><h3 id="二、threadpoolexecutor-对象" tabindex="-1"><a class="header-anchor" href="#二、threadpoolexecutor-对象" aria-hidden="true">#</a> 二、ThreadPoolExecutor 对象</h3><p>在介绍 Executors 创建线程池方法前先介绍一下 ThreadPoolExecutor，因为这些创建线程池的静态方法都是返回 ThreadPoolExecutor 对象，和我们手动创建 ThreadPoolExecutor 对象的区别就是我们不需要自己传构造方法的参数。</p><p>ThreadPoolExecutor 的构造方法共有四个，但最终调用的都是同一个：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token class-name">ThreadPoolExecutor</span><span class="token punctuation">(</span><span class="token keyword">int</span> corePoolSize<span class="token punctuation">,</span>
  <span class="token keyword">int</span> maximumPoolSize<span class="token punctuation">,</span>
  <span class="token keyword">long</span> keepAliveTime<span class="token punctuation">,</span>
  <span class="token class-name">TimeUnit</span> unit<span class="token punctuation">,</span>
@@ -77,6 +77,6 @@
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>使用 Executors 创建的 CachedThreadPool，往线程池中无限添加线程。</p><p>在启动测试类之前先将 JVM 内存调整小一点，不然很容易将电脑跑出问题【别问我为什么知道，是铁憨憨没错了！！！】，在 idea 里：Run -&gt; Edit Configurations。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/ali-executors-3.png" alt=""></p><p>JVM 参数说明：</p><ul><li>-Xms10M =&gt; Java Heap 内存初始化值</li><li>-Xmx10M =&gt; Java Heap 内存最大值</li></ul><p>运行结果：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>Exception: java.lang.OutOfMemoryError thrown from the UncaughtExceptionHandler in thread &quot;main&quot;
 Disconnected from the target VM, address: &#39;127.0.0.1:60416&#39;, transport: &#39;socket&#39;
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><p>创建到 3w 多个线程的时候开始报 OOM 错误。</p><p>另外两个线程池就不做测试了，测试方法一致，只是创建的线程池不一样。</p><h3 id="四、如何定义线程池参数" tabindex="-1"><a class="header-anchor" href="#四、如何定义线程池参数" aria-hidden="true">#</a> 四、如何定义线程池参数</h3><p><strong>1）CPU 密集型</strong></p><p>线程池的大小推荐为 CPU 数量 + 1，CPU 数量可以根据 Runtime.availableProcessors 方法获取</p><p><strong>2）IO 密集型</strong></p><p>CPU 数量 * CPU 利用率 * (1 + 线程等待时间/线程 CPU 时间)</p><p><strong>3）混合型</strong></p><p>将任务分为 CPU 密集型和 IO 密集型，然后分别使用不同的线程池去处理，从而使每个线程池可以根据各自的工作负载来调整。</p><p><strong>4）阻塞队列</strong></p><p>推荐使用有界队列，有界队列有助于避免资源耗尽的情况发生</p><p><strong>5）拒绝策略</strong></p><p>默认采用的是 AbortPolicy 拒绝策略，直接在程序中抛出 RejectedExecutionException 异常【因为是运行时异常，不强制 catch】，这种处理方式不够优雅。</p><p>处理拒绝策略有以下几种比较推荐：</p><ul><li>在程序中捕获 RejectedExecutionException 异常，在捕获异常中对任务进行处理。针对默认拒绝策略</li><li>使用 CallerRunsPolicy 拒绝策略，该策略会将任务交给调用 execute 的线程执行【一般为主线程】，此时主线程将在一段时间内不能提交任何任务，从而使工作线程处理正在执行的任务。此时提交的线程将被保存在 TCP 队列中，TCP 队列满将会影响客户端，这是一种平缓的性能降低</li><li>自定义拒绝策略，只需要实现 RejectedExecutionHandler 接口即可</li><li>如果任务不是特别重要，使用 DiscardPolicy 和 DiscardOldestPolicy 拒绝策略将任务丢弃也是可以的</li></ul><p>如果使用 Executors 的静态方法创建 ThreadPoolExecutor 对象，可以通过使用 Semaphore 对任务的执行进行限流也可以避免出现 OOM 异常。</p><p>由于线程池参数定义经验较少，都是理论知识，欢迎有经验的大佬在评论区补充。</p><hr><blockquote><p>编辑：沉默王二 转载链接：https://mp.weixin.qq.com/s/dd_IPt7lQQeIMH7YTdgLIw 原文链接：https://juejin.cn/post/6844903989675458574</p></blockquote><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png"></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/thread/ali-executors.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/12 下午4:24:21</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><!----><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">2.11 并发编程</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/thread/wangzhe-thread.html" class="nav-link sidebar-link sidebar-page" aria-label="创建Java线程的3种方式"><!---->创建Java线程的3种方式<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/thread-state-and-method.html" class="nav-link sidebar-link sidebar-page" aria-label="线程的6种状态及切换"><!---->线程的6种状态及切换<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a 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href="/thread/synchronized.html" class="nav-link sidebar-link sidebar-page" aria-label="synchronized"><!---->synchronized<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/cas.html" class="nav-link sidebar-link sidebar-page" aria-label="CAS的原理"><!---->CAS的原理<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/thread/aqs.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="AQS详解"><!---->AQS详解<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/aqs.html#aqs简介" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="AQS简介"><!---->AQS简介<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/aqs.html#aqs的数据结构" class="router-link-active router-link-exact-active nav-link 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router-link-exact-active nav-link sidebar-link heading" aria-label="释放资源"><!---->释放资源<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/thread/lock.html" class="nav-link sidebar-link sidebar-page" aria-label="锁"><!---->锁<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/reentrantLock.html" class="nav-link sidebar-link sidebar-page" aria-label="重入锁ReentrantLock"><!---->重入锁ReentrantLock<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ReentrantReadWriteLock.html" class="nav-link sidebar-link sidebar-page" aria-label="读写锁ReentrantReadWriteLock"><!---->读写锁ReentrantReadWriteLock<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/condition.html" class="nav-link sidebar-link sidebar-page" aria-label="线程协作类Condition"><!---->线程协作类Condition<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/LockSupport.html" class="nav-link sidebar-link sidebar-page" aria-label="线程阻塞唤醒类LockSupport"><!---->线程阻塞唤醒类LockSupport<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/map.html" class="nav-link sidebar-link sidebar-page" aria-label="并发集合容器"><!---->并发集合容器<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ConcurrentHashMap.html" class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentHashMap"><!---->ConcurrentHashMap<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ConcurrentLinkedQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentLinkedQueue"><!---->ConcurrentLinkedQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CopyOnWriteArrayList.html" class="nav-link sidebar-link sidebar-page" aria-label="CopyOnWriteArrayList"><!---->CopyOnWriteArrayList<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ThreadLocal.html" class="nav-link sidebar-link sidebar-page" aria-label="ThreadLocal"><!---->ThreadLocal<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/BlockingQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="BlockingQueue"><!---->BlockingQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/pool.html" class="nav-link sidebar-link sidebar-page" aria-label="线程池"><!---->线程池<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ScheduledThreadPoolExecutor.html" class="nav-link sidebar-link sidebar-page" aria-label="计划任务"><!---->计划任务<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/atomic.html" class="nav-link sidebar-link sidebar-page" aria-label="原子操作类"><!---->原子操作类<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CountDownLatch.html" class="nav-link sidebar-link sidebar-page" aria-label="通信工具类CountDownLatch"><!---->通信工具类CountDownLatch<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/fork-join.html" class="nav-link sidebar-link sidebar-page" aria-label="Fork/Join框架"><!---->Fork/Join框架<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/shengchanzhe-xiaofeizhe.html" class="nav-link sidebar-link sidebar-page" aria-label="生产者-消费者模式"><!---->生产者-消费者模式<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow 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href="/thread/aqs.html#aqs简介" class="router-link-active router-link-exact-active toc-link level2">AQS简介</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/aqs.html#aqs的数据结构" class="router-link-active router-link-exact-active toc-link level2">AQS的数据结构</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/aqs.html#资源共享模式" class="router-link-active router-link-exact-active toc-link level2">资源共享模式</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/aqs.html#aqs的主要方法源码解析" class="router-link-active router-link-exact-active toc-link level2">AQS的主要方法源码解析</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/aqs.html#获取资源" class="router-link-active router-link-exact-active toc-link level3">获取资源</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/aqs.html#释放资源" class="router-link-active router-link-exact-active toc-link level2">释放资源</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="java并发aqs详解" tabindex="-1"><a class="header-anchor" href="#java并发aqs详解" aria-hidden="true">#</a> Java并发AQS详解</h1><h2 id="aqs简介" tabindex="-1"><a class="header-anchor" href="#aqs简介" aria-hidden="true">#</a> AQS简介</h2><p><strong>AQS</strong>是<code>AbstractQueuedSynchronizer</code>的简称，即<code>抽象队列同步器</code>，从字面意思上理解:</p><ul><li>抽象：抽象类，只实现一些主要逻辑，有些方法由子类实现；</li><li>队列：使用先进先出（FIFO）队列存储数据；</li><li>同步：实现了同步的功能。</li></ul><p>那AQS有什么用呢？AQS是一个用来构建锁和同步器的框架，使用AQS能简单且高效地构造出应用广泛的同步器，比如我们提到的ReentrantLock，Semaphore，ReentrantReadWriteLock，SynchronousQueue，FutureTask等等皆是基于AQS的。</p><p>当然，我们自己也能利用AQS非常轻松容易地构造出符合我们自己需求的同步器，只要子类实现它的几个<code>protected</code>方法就可以了，在下文会有详细的介绍。</p><h2 id="aqs的数据结构" tabindex="-1"><a class="header-anchor" href="#aqs的数据结构" aria-hidden="true">#</a> AQS的数据结构</h2><p>AQS内部使用了一个volatile的变量state来作为资源的标识。同时定义了几个获取和改变state的protected方法，子类可以覆盖这些方法来实现自己的逻辑：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token function">getState</span><span class="token punctuation">(</span><span class="token punctuation">)</span>
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class="sidebar-heading clickable"><!----><span class="title">2.6 IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">2.11 并发编程</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/thread/wangzhe-thread.html" class="nav-link sidebar-link sidebar-page" aria-label="创建Java线程的3种方式"><!---->创建Java线程的3种方式<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/thread-state-and-method.html" class="nav-link sidebar-link sidebar-page" aria-label="线程的6种状态及切换"><!---->线程的6种状态及切换<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/thread-group-and-thread-priority.html" class="nav-link sidebar-link sidebar-page" aria-label="线程组和线程优先级"><!---->线程组和线程优先级<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/why-need-thread.html" class="nav-link sidebar-link sidebar-page" aria-label="进程与线程的区别"><!---->进程与线程的区别<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/thread-bring-some-problem.html" class="nav-link sidebar-link sidebar-page" aria-label="并发编程带来了哪些问题"><!---->并发编程带来了哪些问题<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/jmm.html" class="nav-link sidebar-link sidebar-page" aria-label="Java内存模型"><!---->Java内存模型<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/volatile.html" class="nav-link sidebar-link sidebar-page" aria-label="volatile"><!---->volatile<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/synchronized.html" class="nav-link sidebar-link sidebar-page" aria-label="synchronized"><!---->synchronized<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/cas.html" class="nav-link sidebar-link sidebar-page" aria-label="CAS的原理"><!---->CAS的原理<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/thread/aqs.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="AQS详解"><!---->AQS详解<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/aqs.html#aqs简介" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="AQS简介"><!---->AQS简介<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/aqs.html#aqs的数据结构" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="AQS的数据结构"><!---->AQS的数据结构<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/aqs.html#资源共享模式" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="资源共享模式"><!---->资源共享模式<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/aqs.html#aqs的主要方法源码解析" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="AQS的主要方法源码解析"><!---->AQS的主要方法源码解析<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/aqs.html#获取资源" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="获取资源"><!---->获取资源<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/aqs.html#释放资源" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="释放资源"><!---->释放资源<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/thread/lock.html" class="nav-link sidebar-link sidebar-page" aria-label="锁"><!---->锁<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/reentrantLock.html" class="nav-link sidebar-link sidebar-page" aria-label="重入锁ReentrantLock"><!---->重入锁ReentrantLock<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ReentrantReadWriteLock.html" class="nav-link sidebar-link sidebar-page" aria-label="读写锁ReentrantReadWriteLock"><!---->读写锁ReentrantReadWriteLock<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/condition.html" class="nav-link sidebar-link sidebar-page" aria-label="线程协作类Condition"><!---->线程协作类Condition<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/LockSupport.html" class="nav-link sidebar-link sidebar-page" aria-label="线程阻塞唤醒类LockSupport"><!---->线程阻塞唤醒类LockSupport<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/map.html" class="nav-link sidebar-link sidebar-page" aria-label="并发集合容器"><!---->并发集合容器<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ConcurrentHashMap.html" class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentHashMap"><!---->ConcurrentHashMap<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ConcurrentLinkedQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentLinkedQueue"><!---->ConcurrentLinkedQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CopyOnWriteArrayList.html" class="nav-link sidebar-link sidebar-page" aria-label="CopyOnWriteArrayList"><!---->CopyOnWriteArrayList<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ThreadLocal.html" class="nav-link sidebar-link sidebar-page" aria-label="ThreadLocal"><!---->ThreadLocal<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/BlockingQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="BlockingQueue"><!---->BlockingQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/pool.html" class="nav-link sidebar-link sidebar-page" aria-label="线程池"><!---->线程池<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ScheduledThreadPoolExecutor.html" class="nav-link sidebar-link sidebar-page" aria-label="计划任务"><!---->计划任务<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/atomic.html" class="nav-link sidebar-link sidebar-page" aria-label="原子操作类"><!---->原子操作类<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CountDownLatch.html" class="nav-link sidebar-link sidebar-page" aria-label="通信工具类CountDownLatch"><!---->通信工具类CountDownLatch<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/fork-join.html" class="nav-link sidebar-link sidebar-page" aria-label="Fork/Join框架"><!---->Fork/Join框架<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/shengchanzhe-xiaofeizhe.html" class="nav-link sidebar-link sidebar-page" aria-label="生产者-消费者模式"><!---->生产者-消费者模式<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java并发AQS详解</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span 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0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><li class="category category6" role>并发编程</li><meta property="articleSection" content="Java核心,并发编程"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 8 分钟</span><meta property="timeRequired" content="PT8M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/aqs.html#aqs简介" class="router-link-active router-link-exact-active toc-link level2">AQS简介</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/aqs.html#aqs的数据结构" class="router-link-active router-link-exact-active toc-link level2">AQS的数据结构</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/aqs.html#资源共享模式" class="router-link-active router-link-exact-active toc-link level2">资源共享模式</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/aqs.html#aqs的主要方法源码解析" class="router-link-active router-link-exact-active toc-link level2">AQS的主要方法源码解析</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/aqs.html#获取资源" class="router-link-active router-link-exact-active toc-link level3">获取资源</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/aqs.html#释放资源" class="router-link-active router-link-exact-active toc-link level2">释放资源</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="java并发aqs详解" tabindex="-1"><a class="header-anchor" href="#java并发aqs详解" aria-hidden="true">#</a> Java并发AQS详解</h1><h2 id="aqs简介" tabindex="-1"><a class="header-anchor" href="#aqs简介" aria-hidden="true">#</a> AQS简介</h2><p><strong>AQS</strong>是<code>AbstractQueuedSynchronizer</code>的简称，即<code>抽象队列同步器</code>，从字面意思上理解:</p><ul><li>抽象：抽象类，只实现一些主要逻辑，有些方法由子类实现；</li><li>队列：使用先进先出（FIFO）队列存储数据；</li><li>同步：实现了同步的功能。</li></ul><p>那AQS有什么用呢？AQS是一个用来构建锁和同步器的框架，使用AQS能简单且高效地构造出应用广泛的同步器，比如我们提到的ReentrantLock，Semaphore，ReentrantReadWriteLock，SynchronousQueue，FutureTask等等皆是基于AQS的。</p><p>当然，我们自己也能利用AQS非常轻松容易地构造出符合我们自己需求的同步器，只要子类实现它的几个<code>protected</code>方法就可以了，在下文会有详细的介绍。</p><h2 id="aqs的数据结构" tabindex="-1"><a class="header-anchor" href="#aqs的数据结构" aria-hidden="true">#</a> AQS的数据结构</h2><p>AQS内部使用了一个volatile的变量state来作为资源的标识。同时定义了几个获取和改变state的protected方法，子类可以覆盖这些方法来实现自己的逻辑：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token function">getState</span><span class="token punctuation">(</span><span class="token punctuation">)</span>
 <span class="token function">setState</span><span class="token punctuation">(</span><span class="token punctuation">)</span>
 <span class="token function">compareAndSetState</span><span class="token punctuation">(</span><span class="token punctuation">)</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>这三种操作均是原子操作，其中compareAndSetState的实现依赖于Unsafe的compareAndSwapInt()方法。</p><p>而AQS类本身实现的是一些排队和阻塞的机制，比如具体线程等待队列的维护（如获取资源失败入队/唤醒出队等）。它内部使用了一个先进先出（FIFO）的双端队列，并使用了两个指针head和tail用于标识队列的头部和尾部。其数据结构如图：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/aqs-c294b5e3-69ef-49bb-ac56-f825894746ab.png" alt=""></p><p>但它并不是直接储存线程，而是储存拥有线程的Node节点。</p><h2 id="资源共享模式" tabindex="-1"><a class="header-anchor" href="#资源共享模式" aria-hidden="true">#</a> 资源共享模式</h2><p>资源有两种共享模式，或者说两种同步方式：</p><ul><li>独占模式（Exclusive）：资源是独占的，一次只能一个线程获取。如ReentrantLock。</li><li>共享模式（Share）：同时可以被多个线程获取，具体的资源个数可以通过参数指定。如Semaphore/CountDownLatch。</li></ul><p>一般情况下，子类只需要根据需求实现其中一种模式，当然也有同时实现两种模式的同步类，如<code>ReadWriteLock</code>。</p><p>AQS中关于这两种资源共享模式的定义源码（均在内部类Node中）。我们来看看Node的结构：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">static</span> <span class="token keyword">final</span> <span class="token keyword">class</span> <span class="token class-name">Node</span> <span class="token punctuation">{</span>
@@ -186,6 +186,6 @@
         <span class="token class-name">LockSupport</span><span class="token punctuation">.</span><span class="token function">unpark</span><span class="token punctuation">(</span>s<span class="token punctuation">.</span>thread<span class="token punctuation">)</span><span class="token punctuation">;</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><hr><blockquote><p>编辑：沉默王二，内容大部分来源以下三个开源仓库：</p><ul><li><a href="http://concurrent.redspider.group/" target="_blank" rel="noopener noreferrer">深入浅出 Java 多线程<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://github.com/CL0610/Java-concurrency" target="_blank" rel="noopener noreferrer">并发编程知识总结<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://github.com/CoderLeixiaoshuai/java-eight-part" target="_blank" rel="noopener noreferrer">Java八股文<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul></blockquote><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png"></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/thread/aqs.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 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sidebar-page" aria-label="读写锁ReentrantReadWriteLock"><!---->读写锁ReentrantReadWriteLock<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/condition.html" class="nav-link sidebar-link sidebar-page" aria-label="线程协作类Condition"><!---->线程协作类Condition<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/LockSupport.html" class="nav-link sidebar-link sidebar-page" aria-label="线程阻塞唤醒类LockSupport"><!---->线程阻塞唤醒类LockSupport<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/map.html" class="nav-link sidebar-link sidebar-page" aria-label="并发集合容器"><!---->并发集合容器<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ConcurrentHashMap.html" class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentHashMap"><!---->ConcurrentHashMap<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ConcurrentLinkedQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentLinkedQueue"><!---->ConcurrentLinkedQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CopyOnWriteArrayList.html" class="nav-link sidebar-link sidebar-page" aria-label="CopyOnWriteArrayList"><!---->CopyOnWriteArrayList<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ThreadLocal.html" class="nav-link sidebar-link sidebar-page" aria-label="ThreadLocal"><!---->ThreadLocal<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/BlockingQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="BlockingQueue"><!---->BlockingQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/pool.html" class="nav-link sidebar-link sidebar-page" aria-label="线程池"><!---->线程池<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ScheduledThreadPoolExecutor.html" class="nav-link sidebar-link sidebar-page" aria-label="计划任务"><!---->计划任务<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/thread/atomic.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="原子操作类"><!---->原子操作类<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/atomic.html#原子操作类介绍" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="原子操作类介绍"><!---->原子操作类介绍<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/atomic.html#预备知识-cas操作" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="预备知识--CAS操作"><!---->预备知识--CAS操作<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/atomic.html#原子更新基本类型" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="原子更新基本类型"><!---->原子更新基本类型<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/atomic.html#原子更新数组类型" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="原子更新数组类型"><!---->原子更新数组类型<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/atomic.html#原子更新引用类型" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="原子更新引用类型"><!---->原子更新引用类型<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/atomic.html#原子更新字段类型" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="原子更新字段类型"><!---->原子更新字段类型<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/thread/CountDownLatch.html" class="nav-link sidebar-link sidebar-page" aria-label="通信工具类CountDownLatch"><!---->通信工具类CountDownLatch<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/fork-join.html" class="nav-link sidebar-link sidebar-page" aria-label="Fork/Join框架"><!---->Fork/Join框架<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/shengchanzhe-xiaofeizhe.html" class="nav-link sidebar-link sidebar-page" aria-label="生产者-消费者模式"><!---->生产者-消费者模式<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java atomic包中的原子操作类总结</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月23日</span><meta property="datePublished" content="2022-03-23T12:08:58.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><li class="category category6" role>并发编程</li><meta property="articleSection" content="Java核心,并发编程"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 10 分钟</span><meta property="timeRequired" content="PT10M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/atomic.html#原子操作类介绍" class="router-link-active router-link-exact-active toc-link level2">原子操作类介绍</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/atomic.html#预备知识-cas操作" class="router-link-active router-link-exact-active toc-link level2">预备知识--CAS操作</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/atomic.html#原子更新基本类型" class="router-link-active router-link-exact-active toc-link level2">原子更新基本类型</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/atomic.html#原子更新数组类型" class="router-link-active router-link-exact-active toc-link level2">原子更新数组类型</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/atomic.html#原子更新引用类型" class="router-link-active router-link-exact-active toc-link level2">原子更新引用类型</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/atomic.html#原子更新字段类型" class="router-link-active router-link-exact-active toc-link level2">原子更新字段类型</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h2 id="原子操作类介绍" tabindex="-1"><a class="header-anchor" href="#原子操作类介绍" aria-hidden="true">#</a> 原子操作类介绍</h2><p>在并发编程中很容易出现并发安全的问题，有一个很简单的例子就是多线程更新变量i=1,比如多个线程执行i++操作，就有可能获取不到正确的值，而这个问题，最常用的方法是通过Synchronized进行控制来达到线程安全的目的。</p><p>但是由于synchronized是采用的是悲观锁策略，并不是特别高效的一种解决方案。实际上，在J.U.C下的atomic包提供了一系列的操作简单，性能高效，并能保证线程安全的类去更新基本类型变量，数组元素，引用类型以及更新对象中的字段类型。atomic包下的这些类都是采用的是乐观锁策略去原子更新数据，在java中则是使用CAS操作具体实现。</p><h2 id="预备知识-cas操作" tabindex="-1"><a class="header-anchor" href="#预备知识-cas操作" aria-hidden="true">#</a> 预备知识--CAS操作</h2><p>能够弄懂atomic包下这些原子操作类的实现原理，就要先明白什么是CAS操作。</p><blockquote><p>什么是CAS?</p></blockquote><p>使用锁时，线程获取锁是一种悲观锁策略，即假设每一次执行临界区代码都会产生冲突，所以当前线程获取到锁的时候同时也会阻塞其他线程获取该锁。而CAS操作（又称为无锁操作）是一种乐观锁策略，它假设所有线程访问共享资源的时候不会出现冲突，既然不会出现冲突自然而然就不会阻塞其他线程的操作。因此，线程就不会出现阻塞停顿的状态。那么，如果出现冲突了怎么办？无锁操作是使用CAS(compare and swap)又叫做比较交换来鉴别线程是否出现冲突，出现冲突就重试当前操作直到没有冲突为止。</p><blockquote><p>CAS的操作过程</p></blockquote><p>CAS比较交换的过程可以通俗的理解为CAS(V,O,N)，包含三个值分别为：V 内存地址存放的实际值；O 预期的值（旧值）；N 更新的新值。当V和O相同时，也就是说旧值和内存中实际的值相同表明该值没有被其他线程更改过，即该旧值O就是目前来说最新的值了，自然而然可以将新值N赋值给V。反之，V和O不相同，表明该值已经被其他线程改过了则该旧值O不是最新版本的值了，所以不能将新值N赋给V，返回V即可。当多个线程使用CAS操作一个变量是，只有一个线程会成功，并成功更新，其余会失败。失败的线程会重新尝试，当然也可以选择挂起线程</p><p>CAS的实现需要硬件指令集的支撑，在JDK1.5后虚拟机才可以使用处理器提供的CMPXCHG指令实现。</p><p><strong>Synchronized VS CAS</strong></p><p>元老级的Synchronized(未优化前)最主要的问题是：在存在线程竞争的情况下会出现线程阻塞和唤醒锁带来的性能问题，因为这是一种互斥同步（阻塞同步）。而CAS并不是武断的间线程挂起，当CAS操作失败后会进行一定的尝试，而非进行耗时的挂起唤醒的操作，因此也叫做非阻塞同步。这是两者主要的区别。</p><blockquote><p>CAS的问题</p></blockquote><ol><li><p>ABA问题 因为CAS会检查旧值有没有变化，这里存在这样一个有意思的问题。比如一个旧值A变为了成B，然后再变成A，刚好在做CAS时检查发现旧值并没有变化依然为A，但是实际上的确发生了变化。解决方案可以沿袭数据库中常用的乐观锁方式，添加一个版本号可以解决。原来的变化路径A-&gt;B-&gt;A就变成了1A-&gt;2B-&gt;3C。</p></li><li><p>自旋时间过长</p></li></ol><p>使用CAS时非阻塞同步，也就是说不会将线程挂起，会自旋（无非就是一个死循环）进行下一次尝试，如果这里自旋时间过长对性能是很大的消耗。如果JVM能支持处理器提供的pause指令，那么在效率上会有一定的提升。</p><h2 id="原子更新基本类型" tabindex="-1"><a class="header-anchor" href="#原子更新基本类型" aria-hidden="true">#</a> 原子更新基本类型</h2><p>atomic包提高原子更新基本类型的工具类，主要有这些：</p><ol><li>AtomicBoolean：以原子更新的方式更新boolean；</li><li>AtomicInteger：以原子更新的方式更新Integer;</li><li>AtomicLong：以原子更新的方式更新Long；</li></ol><p>这几个类的用法基本一致，这里以AtomicInteger为例总结常用的方法</p><ol><li>addAndGet(int delta) ：以原子方式将输入的数值与实例中原本的值相加，并返回最后的结果；</li><li>incrementAndGet() ：以原子的方式将实例中的原值进行加1操作，并返回最终相加后的结果；</li><li>getAndSet(int newValue)：将实例中的值更新为新值，并返回旧值；</li><li>getAndIncrement()：以原子的方式将实例中的原值加1，返回的是自增前的旧值；</li></ol><p>还有一些方法，可以查看API，不再赘述。为了能够弄懂AtomicInteger的实现原理，以getAndIncrement方法为例，来看下源码：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">final</span> <span class="token keyword">int</span> <span class="token function">getAndIncrement</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
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nav-link active sidebar-link sidebar-page active" aria-label="原子操作类"><!---->原子操作类<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/atomic.html#原子操作类介绍" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="原子操作类介绍"><!---->原子操作类介绍<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/atomic.html#预备知识-cas操作" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="预备知识--CAS操作"><!---->预备知识--CAS操作<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/atomic.html#原子更新基本类型" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="原子更新基本类型"><!---->原子更新基本类型<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/atomic.html#原子更新数组类型" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="原子更新数组类型"><!---->原子更新数组类型<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/atomic.html#原子更新引用类型" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="原子更新引用类型"><!---->原子更新引用类型<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/atomic.html#原子更新字段类型" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="原子更新字段类型"><!---->原子更新字段类型<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/thread/CountDownLatch.html" class="nav-link sidebar-link sidebar-page" aria-label="通信工具类CountDownLatch"><!---->通信工具类CountDownLatch<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/fork-join.html" class="nav-link sidebar-link sidebar-page" aria-label="Fork/Join框架"><!---->Fork/Join框架<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/shengchanzhe-xiaofeizhe.html" class="nav-link sidebar-link sidebar-page" aria-label="生产者-消费者模式"><!---->生产者-消费者模式<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java atomic包中的原子操作类总结</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 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0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><li class="category category6" role>并发编程</li><meta property="articleSection" content="Java核心,并发编程"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 10 分钟</span><meta property="timeRequired" content="PT10M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/atomic.html#原子操作类介绍" class="router-link-active router-link-exact-active toc-link level2">原子操作类介绍</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/atomic.html#预备知识-cas操作" class="router-link-active router-link-exact-active toc-link level2">预备知识--CAS操作</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/atomic.html#原子更新基本类型" class="router-link-active router-link-exact-active toc-link level2">原子更新基本类型</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/atomic.html#原子更新数组类型" class="router-link-active router-link-exact-active toc-link level2">原子更新数组类型</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/atomic.html#原子更新引用类型" class="router-link-active router-link-exact-active toc-link level2">原子更新引用类型</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/atomic.html#原子更新字段类型" class="router-link-active router-link-exact-active toc-link level2">原子更新字段类型</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h2 id="原子操作类介绍" tabindex="-1"><a class="header-anchor" href="#原子操作类介绍" aria-hidden="true">#</a> 原子操作类介绍</h2><p>在并发编程中很容易出现并发安全的问题，有一个很简单的例子就是多线程更新变量i=1,比如多个线程执行i++操作，就有可能获取不到正确的值，而这个问题，最常用的方法是通过Synchronized进行控制来达到线程安全的目的。</p><p>但是由于synchronized是采用的是悲观锁策略，并不是特别高效的一种解决方案。实际上，在J.U.C下的atomic包提供了一系列的操作简单，性能高效，并能保证线程安全的类去更新基本类型变量，数组元素，引用类型以及更新对象中的字段类型。atomic包下的这些类都是采用的是乐观锁策略去原子更新数据，在java中则是使用CAS操作具体实现。</p><h2 id="预备知识-cas操作" tabindex="-1"><a class="header-anchor" href="#预备知识-cas操作" aria-hidden="true">#</a> 预备知识--CAS操作</h2><p>能够弄懂atomic包下这些原子操作类的实现原理，就要先明白什么是CAS操作。</p><blockquote><p>什么是CAS?</p></blockquote><p>使用锁时，线程获取锁是一种悲观锁策略，即假设每一次执行临界区代码都会产生冲突，所以当前线程获取到锁的时候同时也会阻塞其他线程获取该锁。而CAS操作（又称为无锁操作）是一种乐观锁策略，它假设所有线程访问共享资源的时候不会出现冲突，既然不会出现冲突自然而然就不会阻塞其他线程的操作。因此，线程就不会出现阻塞停顿的状态。那么，如果出现冲突了怎么办？无锁操作是使用CAS(compare and swap)又叫做比较交换来鉴别线程是否出现冲突，出现冲突就重试当前操作直到没有冲突为止。</p><blockquote><p>CAS的操作过程</p></blockquote><p>CAS比较交换的过程可以通俗的理解为CAS(V,O,N)，包含三个值分别为：V 内存地址存放的实际值；O 预期的值（旧值）；N 更新的新值。当V和O相同时，也就是说旧值和内存中实际的值相同表明该值没有被其他线程更改过，即该旧值O就是目前来说最新的值了，自然而然可以将新值N赋值给V。反之，V和O不相同，表明该值已经被其他线程改过了则该旧值O不是最新版本的值了，所以不能将新值N赋给V，返回V即可。当多个线程使用CAS操作一个变量是，只有一个线程会成功，并成功更新，其余会失败。失败的线程会重新尝试，当然也可以选择挂起线程</p><p>CAS的实现需要硬件指令集的支撑，在JDK1.5后虚拟机才可以使用处理器提供的CMPXCHG指令实现。</p><p><strong>Synchronized VS CAS</strong></p><p>元老级的Synchronized(未优化前)最主要的问题是：在存在线程竞争的情况下会出现线程阻塞和唤醒锁带来的性能问题，因为这是一种互斥同步（阻塞同步）。而CAS并不是武断的间线程挂起，当CAS操作失败后会进行一定的尝试，而非进行耗时的挂起唤醒的操作，因此也叫做非阻塞同步。这是两者主要的区别。</p><blockquote><p>CAS的问题</p></blockquote><ol><li><p>ABA问题 因为CAS会检查旧值有没有变化，这里存在这样一个有意思的问题。比如一个旧值A变为了成B，然后再变成A，刚好在做CAS时检查发现旧值并没有变化依然为A，但是实际上的确发生了变化。解决方案可以沿袭数据库中常用的乐观锁方式，添加一个版本号可以解决。原来的变化路径A-&gt;B-&gt;A就变成了1A-&gt;2B-&gt;3C。</p></li><li><p>自旋时间过长</p></li></ol><p>使用CAS时非阻塞同步，也就是说不会将线程挂起，会自旋（无非就是一个死循环）进行下一次尝试，如果这里自旋时间过长对性能是很大的消耗。如果JVM能支持处理器提供的pause指令，那么在效率上会有一定的提升。</p><h2 id="原子更新基本类型" tabindex="-1"><a class="header-anchor" href="#原子更新基本类型" aria-hidden="true">#</a> 原子更新基本类型</h2><p>atomic包提高原子更新基本类型的工具类，主要有这些：</p><ol><li>AtomicBoolean：以原子更新的方式更新boolean；</li><li>AtomicInteger：以原子更新的方式更新Integer;</li><li>AtomicLong：以原子更新的方式更新Long；</li></ol><p>这几个类的用法基本一致，这里以AtomicInteger为例总结常用的方法</p><ol><li>addAndGet(int delta) ：以原子方式将输入的数值与实例中原本的值相加，并返回最后的结果；</li><li>incrementAndGet() ：以原子的方式将实例中的原值进行加1操作，并返回最终相加后的结果；</li><li>getAndSet(int newValue)：将实例中的值更新为新值，并返回旧值；</li><li>getAndIncrement()：以原子的方式将实例中的原值加1，返回的是自增前的旧值；</li></ol><p>还有一些方法，可以查看API，不再赘述。为了能够弄懂AtomicInteger的实现原理，以getAndIncrement方法为例，来看下源码：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">final</span> <span class="token keyword">int</span> <span class="token function">getAndIncrement</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
     <span class="token keyword">return</span> unsafe<span class="token punctuation">.</span><span class="token function">getAndAddInt</span><span class="token punctuation">(</span><span class="token keyword">this</span><span class="token punctuation">,</span> valueOffset<span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>可以看出，该方法实际上是调用了unsafe实例的getAndAddInt方法，unsafe实例的获取时通过UnSafe类的静态方法getUnsafe获取：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">private</span> <span class="token keyword">static</span> <span class="token keyword">final</span> <span class="token class-name">Unsafe</span> unsafe <span class="token operator">=</span> <span class="token class-name">Unsafe</span><span class="token punctuation">.</span><span class="token function">getUnsafe</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
@@ -146,6 +146,6 @@
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 <span class="token number">6</span>
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class="line-number"></div><div class="line-number"></div></div></div><p>从示例中可以看出，创建<code>AtomicIntegerFieldUpdater</code>是通过它提供的静态方法进行创建，<code>getAndAdd</code>方法会将指定的字段加上输入的值，并且返回相加之前的值。user对象中age字段原值为1，加5之后，可以看出user对象中的age字段的值已经变成了6。</p><hr><blockquote><p>编辑：沉默王二，内容大部分来源以下三个开源仓库：</p><ul><li><a href="http://concurrent.redspider.group/" target="_blank" rel="noopener noreferrer">深入浅出 Java 多线程<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://github.com/CL0610/Java-concurrency" 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href="/thread/cas.html#java实现cas的原理-unsafe类" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="Java实现CAS的原理 - Unsafe类"><!---->Java实现CAS的原理 - Unsafe类<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/cas.html#原子操作-atomicinteger类源码简析" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="原子操作-AtomicInteger类源码简析"><!---->原子操作-AtomicInteger类源码简析<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/cas.html#cas实现原子操作的三大问题" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="CAS实现原子操作的三大问题"><!---->CAS实现原子操作的三大问题<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/cas.html#aba问题" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="ABA问题"><!---->ABA问题<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/cas.html#循环时间长开销大" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="循环时间长开销大"><!---->循环时间长开销大<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/cas.html#只能保证一个共享变量的原子操作" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="只能保证一个共享变量的原子操作"><!---->只能保证一个共享变量的原子操作<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li></ul><!--]--></li><li><!--[--><a href="/thread/aqs.html" class="nav-link sidebar-link sidebar-page" aria-label="AQS详解"><!---->AQS详解<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/lock.html" class="nav-link sidebar-link sidebar-page" aria-label="锁"><!---->锁<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/reentrantLock.html" class="nav-link sidebar-link sidebar-page" aria-label="重入锁ReentrantLock"><!---->重入锁ReentrantLock<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ReentrantReadWriteLock.html" class="nav-link sidebar-link sidebar-page" aria-label="读写锁ReentrantReadWriteLock"><!---->读写锁ReentrantReadWriteLock<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/condition.html" class="nav-link sidebar-link sidebar-page" aria-label="线程协作类Condition"><!---->线程协作类Condition<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/LockSupport.html" class="nav-link sidebar-link sidebar-page" aria-label="线程阻塞唤醒类LockSupport"><!---->线程阻塞唤醒类LockSupport<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/map.html" class="nav-link sidebar-link sidebar-page" aria-label="并发集合容器"><!---->并发集合容器<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ConcurrentHashMap.html" class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentHashMap"><!---->ConcurrentHashMap<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ConcurrentLinkedQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentLinkedQueue"><!---->ConcurrentLinkedQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CopyOnWriteArrayList.html" class="nav-link sidebar-link sidebar-page" aria-label="CopyOnWriteArrayList"><!---->CopyOnWriteArrayList<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ThreadLocal.html" class="nav-link sidebar-link sidebar-page" aria-label="ThreadLocal"><!---->ThreadLocal<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/BlockingQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="BlockingQueue"><!---->BlockingQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/pool.html" class="nav-link sidebar-link sidebar-page" aria-label="线程池"><!---->线程池<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ScheduledThreadPoolExecutor.html" class="nav-link sidebar-link sidebar-page" aria-label="计划任务"><!---->计划任务<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/atomic.html" class="nav-link sidebar-link sidebar-page" aria-label="原子操作类"><!---->原子操作类<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CountDownLatch.html" class="nav-link sidebar-link sidebar-page" aria-label="通信工具类CountDownLatch"><!---->通信工具类CountDownLatch<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/fork-join.html" class="nav-link sidebar-link sidebar-page" aria-label="Fork/Join框架"><!---->Fork/Join框架<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/shengchanzhe-xiaofeizhe.html" class="nav-link sidebar-link sidebar-page" aria-label="生产者-消费者模式"><!---->生产者-消费者模式<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java实现CAS的原理</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 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0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><li class="category category6" role>并发编程</li><meta property="articleSection" content="Java核心,并发编程"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 10 分钟</span><meta property="timeRequired" content="PT10M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/cas.html#乐观锁与悲观锁的概念" class="router-link-active router-link-exact-active toc-link level2">乐观锁与悲观锁的概念</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/cas.html#cas的概念" class="router-link-active router-link-exact-active toc-link level2">CAS的概念</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/cas.html#java实现cas的原理-unsafe类" class="router-link-active router-link-exact-active toc-link level2">Java实现CAS的原理 - Unsafe类</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/cas.html#原子操作-atomicinteger类源码简析" class="router-link-active router-link-exact-active toc-link level2">原子操作-AtomicInteger类源码简析</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/cas.html#cas实现原子操作的三大问题" class="router-link-active router-link-exact-active toc-link level2">CAS实现原子操作的三大问题</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/cas.html#aba问题" class="router-link-active router-link-exact-active toc-link level3">ABA问题</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/cas.html#循环时间长开销大" class="router-link-active router-link-exact-active toc-link level3">循环时间长开销大</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/cas.html#只能保证一个共享变量的原子操作" class="router-link-active router-link-exact-active toc-link level3">只能保证一个共享变量的原子操作</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="java实现cas的原理" tabindex="-1"><a class="header-anchor" href="#java实现cas的原理" aria-hidden="true">#</a> Java实现CAS的原理</h1><p>在并发编程中我们都知道<code>i++</code>操作是非线程安全的，这是因为 <code>i++</code>操作不是原子操作。</p><p>如何保证原子性呢？常用的方法就是<code>加锁</code>。在Java语言中可以使用 <code>synchronized</code>和<code>CAS</code>实现加锁效果。</p><p><code>synchronized</code>是悲观锁，线程开始执行第一步就是获取锁，一旦获得锁，其他的线程进入后就会阻塞等待锁。如果不好理解，举个生活中的例子：一个人进入厕所后首先把门锁上（获取锁），然后开始上厕所，这个时候有其他人来了只能在外面等（阻塞），就算再急也没用。上完厕所完事后把门打开（解锁），其他人就可以进入了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/cas-973e8804-c713-43f6-9a63-4b9f2be54f10.png" alt=""></p><p><code>CAS</code>是乐观锁，线程执行的时候不会加锁，假设没有冲突去完成某项操作，如果因为冲突失败了就重试，最后直到成功为止。</p><h2 id="乐观锁与悲观锁的概念" tabindex="-1"><a class="header-anchor" href="#乐观锁与悲观锁的概念" aria-hidden="true">#</a> 乐观锁与悲观锁的概念</h2><p>锁可以从不同的角度分类。其中，乐观锁和悲观锁是一种分类方式。</p><p><strong>悲观锁：</strong></p><p>悲观锁就是我们常说的锁。对于悲观锁来说，它总是认为每次访问共享资源时会发生冲突，所以必须对每次数据操作加上锁，以保证临界区的程序同一时间只能有一个线程在执行。</p><p><strong>乐观锁：</strong></p><p>乐观锁又称为“无锁”，顾名思义，它是乐观派。乐观锁总是假设对共享资源的访问没有冲突，线程可以不停地执行，无需加锁也无需等待。而一旦多个线程发生冲突，乐观锁通常是使用一种称为CAS的技术来保证线程执行的安全性。</p><p>由于无锁操作中没有锁的存在，因此不可能出现死锁的情况，也就是说<strong>乐观锁天生免疫死锁</strong>。</p><p>乐观锁多用于“读多写少“的环境，避免频繁加锁影响性能；而悲观锁多用于”写多读少“的环境，避免频繁失败和重试影响性能。</p><h2 id="cas的概念" tabindex="-1"><a class="header-anchor" href="#cas的概念" aria-hidden="true">#</a> CAS的概念</h2><p>CAS的全称是：比较并交换（Compare And Swap）。在CAS中，有这样三个值：</p><ul><li>V：要更新的变量(var)</li><li>E：预期值(expected)</li><li>N：新值(new)</li></ul><p>比较并交换的过程如下：</p><p>判断V是否等于E，如果等于，将V的值设置为N；如果不等，说明已经有其它线程更新了V，则当前线程放弃更新，什么都不做。</p><p>所以这里的<strong>预期值E本质上指的是“旧值”</strong>。</p><p>我们以一个简单的例子来解释这个过程：</p><ol><li>如果有一个多个线程共享的变量<code>i</code>原本等于5，我现在在线程A中，想把它设置为新的值6;</li><li>我们使用CAS来做这个事情；</li><li>首先我们用i去与5对比，发现它等于5，说明没有被其它线程改过，那我就把它设置为新的值6，此次CAS成功，<code>i</code>的值被设置成了6；</li><li>如果不等于5，说明<code>i</code>被其它线程改过了（比如现在<code>i</code>的值为2），那么我就什么也不做，此次CAS失败，<code>i</code>的值仍然为2。</li></ol><p>在这个例子中，<code>i</code>就是V，5就是E，6就是N。</p><p>那有没有可能我在判断了<code>i</code>为5之后，正准备更新它的新值的时候，被其它线程更改了<code>i</code>的值呢？</p><p>不会的。因为CAS是一种原子操作，它是一种系统原语，是一条CPU的原子指令，从CPU层面保证它的原子性</p><p><strong>当多个线程同时使用CAS操作一个变量时，只有一个会胜出，并成功更新，其余均会失败，但失败的线程并不会被挂起，仅是被告知失败，并且允许再次尝试，当然也允许失败的线程放弃操作。</strong></p><h2 id="java实现cas的原理-unsafe类" tabindex="-1"><a class="header-anchor" href="#java实现cas的原理-unsafe类" aria-hidden="true">#</a> Java实现CAS的原理 - Unsafe类</h2><p>前面提到，CAS是一种原子操作。那么Java是怎样来使用CAS的呢？我们知道，在Java中，如果一个方法是native的，那Java就不负责具体实现它，而是交给底层的JVM使用c或者c++去实现。</p><p>在Java中，有一个<code>Unsafe</code>类，它在<code>sun.misc</code>包中。它里面是一些<code>native</code>方法，其中就有几个关于CAS的：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">boolean</span> <span class="token function">compareAndSwapObject</span><span class="token punctuation">(</span><span class="token class-name">Object</span> o<span class="token punctuation">,</span> <span class="token keyword">long</span> offset<span class="token punctuation">,</span><span class="token class-name">Object</span> expected<span class="token punctuation">,</span> <span class="token class-name">Object</span> x<span class="token punctuation">)</span><span class="token punctuation">;</span>
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aria-label="CAS的原理"><!---->CAS的原理<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/cas.html#乐观锁与悲观锁的概念" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="乐观锁与悲观锁的概念"><!---->乐观锁与悲观锁的概念<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/cas.html#cas的概念" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="CAS的概念"><!---->CAS的概念<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/cas.html#java实现cas的原理-unsafe类" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="Java实现CAS的原理 - Unsafe类"><!---->Java实现CAS的原理 - Unsafe类<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/cas.html#原子操作-atomicinteger类源码简析" 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class="nav-link sidebar-link sidebar-page" aria-label="计划任务"><!---->计划任务<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/atomic.html" class="nav-link sidebar-link sidebar-page" aria-label="原子操作类"><!---->原子操作类<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CountDownLatch.html" class="nav-link sidebar-link sidebar-page" aria-label="通信工具类CountDownLatch"><!---->通信工具类CountDownLatch<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/fork-join.html" class="nav-link sidebar-link sidebar-page" aria-label="Fork/Join框架"><!---->Fork/Join框架<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/shengchanzhe-xiaofeizhe.html" class="nav-link sidebar-link sidebar-page" aria-label="生产者-消费者模式"><!---->生产者-消费者模式<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java实现CAS的原理</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" 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10 分钟</span><meta property="timeRequired" content="PT10M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/cas.html#乐观锁与悲观锁的概念" class="router-link-active router-link-exact-active toc-link level2">乐观锁与悲观锁的概念</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/cas.html#cas的概念" class="router-link-active router-link-exact-active toc-link level2">CAS的概念</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/cas.html#java实现cas的原理-unsafe类" class="router-link-active router-link-exact-active toc-link level2">Java实现CAS的原理 - Unsafe类</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/cas.html#原子操作-atomicinteger类源码简析" class="router-link-active router-link-exact-active toc-link level2">原子操作-AtomicInteger类源码简析</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/cas.html#cas实现原子操作的三大问题" class="router-link-active router-link-exact-active toc-link level2">CAS实现原子操作的三大问题</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/cas.html#aba问题" class="router-link-active router-link-exact-active toc-link level3">ABA问题</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/cas.html#循环时间长开销大" class="router-link-active router-link-exact-active toc-link level3">循环时间长开销大</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/cas.html#只能保证一个共享变量的原子操作" class="router-link-active router-link-exact-active toc-link level3">只能保证一个共享变量的原子操作</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="java实现cas的原理" tabindex="-1"><a class="header-anchor" href="#java实现cas的原理" aria-hidden="true">#</a> Java实现CAS的原理</h1><p>在并发编程中我们都知道<code>i++</code>操作是非线程安全的，这是因为 <code>i++</code>操作不是原子操作。</p><p>如何保证原子性呢？常用的方法就是<code>加锁</code>。在Java语言中可以使用 <code>synchronized</code>和<code>CAS</code>实现加锁效果。</p><p><code>synchronized</code>是悲观锁，线程开始执行第一步就是获取锁，一旦获得锁，其他的线程进入后就会阻塞等待锁。如果不好理解，举个生活中的例子：一个人进入厕所后首先把门锁上（获取锁），然后开始上厕所，这个时候有其他人来了只能在外面等（阻塞），就算再急也没用。上完厕所完事后把门打开（解锁），其他人就可以进入了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/cas-973e8804-c713-43f6-9a63-4b9f2be54f10.png" alt=""></p><p><code>CAS</code>是乐观锁，线程执行的时候不会加锁，假设没有冲突去完成某项操作，如果因为冲突失败了就重试，最后直到成功为止。</p><h2 id="乐观锁与悲观锁的概念" tabindex="-1"><a class="header-anchor" href="#乐观锁与悲观锁的概念" aria-hidden="true">#</a> 乐观锁与悲观锁的概念</h2><p>锁可以从不同的角度分类。其中，乐观锁和悲观锁是一种分类方式。</p><p><strong>悲观锁：</strong></p><p>悲观锁就是我们常说的锁。对于悲观锁来说，它总是认为每次访问共享资源时会发生冲突，所以必须对每次数据操作加上锁，以保证临界区的程序同一时间只能有一个线程在执行。</p><p><strong>乐观锁：</strong></p><p>乐观锁又称为“无锁”，顾名思义，它是乐观派。乐观锁总是假设对共享资源的访问没有冲突，线程可以不停地执行，无需加锁也无需等待。而一旦多个线程发生冲突，乐观锁通常是使用一种称为CAS的技术来保证线程执行的安全性。</p><p>由于无锁操作中没有锁的存在，因此不可能出现死锁的情况，也就是说<strong>乐观锁天生免疫死锁</strong>。</p><p>乐观锁多用于“读多写少“的环境，避免频繁加锁影响性能；而悲观锁多用于”写多读少“的环境，避免频繁失败和重试影响性能。</p><h2 id="cas的概念" tabindex="-1"><a class="header-anchor" href="#cas的概念" aria-hidden="true">#</a> CAS的概念</h2><p>CAS的全称是：比较并交换（Compare And Swap）。在CAS中，有这样三个值：</p><ul><li>V：要更新的变量(var)</li><li>E：预期值(expected)</li><li>N：新值(new)</li></ul><p>比较并交换的过程如下：</p><p>判断V是否等于E，如果等于，将V的值设置为N；如果不等，说明已经有其它线程更新了V，则当前线程放弃更新，什么都不做。</p><p>所以这里的<strong>预期值E本质上指的是“旧值”</strong>。</p><p>我们以一个简单的例子来解释这个过程：</p><ol><li>如果有一个多个线程共享的变量<code>i</code>原本等于5，我现在在线程A中，想把它设置为新的值6;</li><li>我们使用CAS来做这个事情；</li><li>首先我们用i去与5对比，发现它等于5，说明没有被其它线程改过，那我就把它设置为新的值6，此次CAS成功，<code>i</code>的值被设置成了6；</li><li>如果不等于5，说明<code>i</code>被其它线程改过了（比如现在<code>i</code>的值为2），那么我就什么也不做，此次CAS失败，<code>i</code>的值仍然为2。</li></ol><p>在这个例子中，<code>i</code>就是V，5就是E，6就是N。</p><p>那有没有可能我在判断了<code>i</code>为5之后，正准备更新它的新值的时候，被其它线程更改了<code>i</code>的值呢？</p><p>不会的。因为CAS是一种原子操作，它是一种系统原语，是一条CPU的原子指令，从CPU层面保证它的原子性</p><p><strong>当多个线程同时使用CAS操作一个变量时，只有一个会胜出，并成功更新，其余均会失败，但失败的线程并不会被挂起，仅是被告知失败，并且允许再次尝试，当然也允许失败的线程放弃操作。</strong></p><h2 id="java实现cas的原理-unsafe类" tabindex="-1"><a class="header-anchor" href="#java实现cas的原理-unsafe类" aria-hidden="true">#</a> Java实现CAS的原理 - Unsafe类</h2><p>前面提到，CAS是一种原子操作。那么Java是怎样来使用CAS的呢？我们知道，在Java中，如果一个方法是native的，那Java就不负责具体实现它，而是交给底层的JVM使用c或者c++去实现。</p><p>在Java中，有一个<code>Unsafe</code>类，它在<code>sun.misc</code>包中。它里面是一些<code>native</code>方法，其中就有几个关于CAS的：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">boolean</span> <span class="token function">compareAndSwapObject</span><span class="token punctuation">(</span><span class="token class-name">Object</span> o<span class="token punctuation">,</span> <span class="token keyword">long</span> offset<span class="token punctuation">,</span><span class="token class-name">Object</span> expected<span class="token punctuation">,</span> <span class="token class-name">Object</span> x<span class="token punctuation">)</span><span class="token punctuation">;</span>
 <span class="token keyword">boolean</span> <span class="token function">compareAndSwapInt</span><span class="token punctuation">(</span><span class="token class-name">Object</span> o<span class="token punctuation">,</span> <span class="token keyword">long</span> offset<span class="token punctuation">,</span><span class="token keyword">int</span> expected<span class="token punctuation">,</span><span class="token keyword">int</span> x<span class="token punctuation">)</span><span class="token punctuation">;</span>
 <span class="token keyword">boolean</span> <span class="token function">compareAndSwapLong</span><span class="token punctuation">(</span><span class="token class-name">Object</span> o<span class="token punctuation">,</span> <span class="token keyword">long</span> offset<span class="token punctuation">,</span><span class="token keyword">long</span> expected<span class="token punctuation">,</span><span class="token keyword">long</span> x<span class="token punctuation">)</span><span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>当然，他们都是<code>public native</code>的。</p><p>Unsafe中对CAS的实现是C++写的，它的具体实现和操作系统、CPU都有关系。</p><p>Linux的X86下主要是通过<code>cmpxchgl</code>这个指令在CPU级完成CAS操作的，但在多处理器情况下必须使用<code>lock</code>指令加锁来完成。当然不同的操作系统和处理器的实现会有所不同，大家可以自行了解。</p><p>当然，Unsafe类里面还有其它方法用于不同的用途。比如支持线程挂起和恢复的<code>park</code>和<code>unpark</code>， LockSupport类底层就是调用了这两个方法。还有支持反射操作的<code>allocateInstance()</code>方法。</p><h2 id="原子操作-atomicinteger类源码简析" tabindex="-1"><a class="header-anchor" href="#原子操作-atomicinteger类源码简析" aria-hidden="true">#</a> 原子操作-AtomicInteger类源码简析</h2><p>上面介绍了Unsafe类的几个支持CAS的方法。那Java具体是如何使用这几个方法来实现原子操作的呢？</p><p>JDK提供了一些用于原子操作的类，在<code>java.util.concurrent.atomic</code>包下面。在JDK 11中，有如下17个类：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/cas-f6a2281a-d322-4022-8c07-162ccc9dcede.jpg" alt="原子类"></p><p>从名字就可以看得出来这些类大概的用途：</p><ul><li>原子更新基本类型</li><li>原子更新数组</li><li>原子更新引用</li><li>原子更新字段（属性）</li></ul><p>这里我们以<code>AtomicInteger</code>类的<code>getAndAdd(int delta)</code>方法为例，来看看Java是如何实现原子操作的。</p><p>先看看这个方法的源码：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">final</span> <span class="token keyword">int</span> <span class="token function">getAndAdd</span><span class="token punctuation">(</span><span class="token keyword">int</span> delta<span class="token punctuation">)</span> <span class="token punctuation">{</span>
@@ -80,6 +80,6 @@
          <span class="token function">casPair</span><span class="token punctuation">(</span>current<span class="token punctuation">,</span> <span class="token class-name">Pair</span><span class="token punctuation">.</span><span class="token function">of</span><span class="token punctuation">(</span>newReference<span class="token punctuation">,</span> newStamp<span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="循环时间长开销大" tabindex="-1"><a class="header-anchor" href="#循环时间长开销大" aria-hidden="true">#</a> 循环时间长开销大</h3><p>CAS多与自旋结合。如果自旋CAS长时间不成功，会占用大量的CPU资源。</p><p>解决思路是让JVM支持处理器提供的<strong>pause指令</strong>。</p><p>pause指令能让自旋失败时cpu睡眠一小段时间再继续自旋，从而使得读操作的频率低很多,为解决内存顺序冲突而导致的CPU流水线重排的代价也会小很多。</p><h3 id="只能保证一个共享变量的原子操作" tabindex="-1"><a class="header-anchor" href="#只能保证一个共享变量的原子操作" aria-hidden="true">#</a> 只能保证一个共享变量的原子操作</h3><p>这个问题你可能已经知道怎么解决了。有两种解决方案：</p><ol><li>使用JDK 1.5开始就提供的<code>AtomicReference</code>类保证对象之间的原子性，把多个变量放到一个对象里面进行CAS操作；</li><li>使用锁。锁内的临界区代码可以保证只有当前线程能操作。</li></ol><hr><blockquote><p>编辑：沉默王二，内容大部分来源以下三个开源仓库：</p><ul><li><a href="http://concurrent.redspider.group/" target="_blank" rel="noopener noreferrer">深入浅出 Java 多线程<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://github.com/CL0610/Java-concurrency" target="_blank" rel="noopener noreferrer">并发编程知识总结<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://github.com/CoderLeixiaoshuai/java-eight-part" target="_blank" rel="noopener noreferrer">Java八股文<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 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diff --git a/dist/thread/condition.html b/dist/thread/condition.html
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class="title">2.4 字符串&amp;数组</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.5 集合框架（容器）</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.6 IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">2.11 并发编程</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/thread/wangzhe-thread.html" class="nav-link sidebar-link sidebar-page" aria-label="创建Java线程的3种方式"><!---->创建Java线程的3种方式<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/thread-state-and-method.html" class="nav-link sidebar-link sidebar-page" aria-label="线程的6种状态及切换"><!---->线程的6种状态及切换<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/thread-group-and-thread-priority.html" class="nav-link sidebar-link sidebar-page" aria-label="线程组和线程优先级"><!---->线程组和线程优先级<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/why-need-thread.html" class="nav-link sidebar-link sidebar-page" aria-label="进程与线程的区别"><!---->进程与线程的区别<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/thread-bring-some-problem.html" class="nav-link sidebar-link sidebar-page" aria-label="并发编程带来了哪些问题"><!---->并发编程带来了哪些问题<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/jmm.html" class="nav-link sidebar-link sidebar-page" aria-label="Java内存模型"><!---->Java内存模型<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/volatile.html" class="nav-link sidebar-link sidebar-page" aria-label="volatile"><!---->volatile<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/synchronized.html" class="nav-link sidebar-link sidebar-page" aria-label="synchronized"><!---->synchronized<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/cas.html" class="nav-link sidebar-link sidebar-page" aria-label="CAS的原理"><!---->CAS的原理<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/aqs.html" class="nav-link sidebar-link sidebar-page" aria-label="AQS详解"><!---->AQS详解<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/lock.html" class="nav-link sidebar-link sidebar-page" aria-label="锁"><!---->锁<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/reentrantLock.html" class="nav-link sidebar-link sidebar-page" aria-label="重入锁ReentrantLock"><!---->重入锁ReentrantLock<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ReentrantReadWriteLock.html" class="nav-link sidebar-link sidebar-page" aria-label="读写锁ReentrantReadWriteLock"><!---->读写锁ReentrantReadWriteLock<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/thread/condition.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="线程协作类Condition"><!---->线程协作类Condition<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/condition.html#condition简介" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="Condition简介"><!---->Condition简介<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/condition.html#condition实现原理分析" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="Condition实现原理分析"><!---->Condition实现原理分析<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/condition.html#等待队列" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="等待队列"><!---->等待队列<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/condition.html#await实现原理" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="await实现原理"><!---->await实现原理<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/condition.html#signal-signalall实现原理" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="signal/signalAll实现原理"><!---->signal/signalAll实现原理<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/condition.html#await与signal-signalall的结合思考" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="await与signal/signalAll的结合思考"><!---->await与signal/signalAll的结合思考<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/condition.html#一个例子" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="一个例子"><!---->一个例子<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/thread/LockSupport.html" class="nav-link sidebar-link sidebar-page" aria-label="线程阻塞唤醒类LockSupport"><!---->线程阻塞唤醒类LockSupport<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/map.html" class="nav-link sidebar-link sidebar-page" aria-label="并发集合容器"><!---->并发集合容器<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ConcurrentHashMap.html" class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentHashMap"><!---->ConcurrentHashMap<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ConcurrentLinkedQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentLinkedQueue"><!---->ConcurrentLinkedQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CopyOnWriteArrayList.html" class="nav-link sidebar-link sidebar-page" aria-label="CopyOnWriteArrayList"><!---->CopyOnWriteArrayList<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ThreadLocal.html" class="nav-link sidebar-link sidebar-page" aria-label="ThreadLocal"><!---->ThreadLocal<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/BlockingQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="BlockingQueue"><!---->BlockingQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/pool.html" class="nav-link sidebar-link sidebar-page" aria-label="线程池"><!---->线程池<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ScheduledThreadPoolExecutor.html" class="nav-link sidebar-link sidebar-page" aria-label="计划任务"><!---->计划任务<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/atomic.html" class="nav-link sidebar-link sidebar-page" aria-label="原子操作类"><!---->原子操作类<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CountDownLatch.html" class="nav-link sidebar-link sidebar-page" aria-label="通信工具类CountDownLatch"><!---->通信工具类CountDownLatch<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/fork-join.html" class="nav-link sidebar-link sidebar-page" aria-label="Fork/Join框架"><!---->Fork/Join框架<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/shengchanzhe-xiaofeizhe.html" class="nav-link sidebar-link sidebar-page" aria-label="生产者-消费者模式"><!---->生产者-消费者模式<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->深入理解Java并发线程协作类Condition</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 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15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 14 分钟</span><meta property="timeRequired" content="PT14M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/condition.html#condition简介" class="router-link-active router-link-exact-active toc-link level2">Condition简介</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/condition.html#condition实现原理分析" class="router-link-active router-link-exact-active toc-link level2">Condition实现原理分析</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/condition.html#等待队列" class="router-link-active router-link-exact-active toc-link level3">等待队列</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/condition.html#await实现原理" class="router-link-active router-link-exact-active toc-link level3">await实现原理</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/condition.html#signal-signalall实现原理" class="router-link-active router-link-exact-active toc-link level3">signal/signalAll实现原理</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/condition.html#await与signal-signalall的结合思考" class="router-link-active router-link-exact-active toc-link level2">await与signal/signalAll的结合思考</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/condition.html#一个例子" class="router-link-active router-link-exact-active toc-link level2">一个例子</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="深入理解java并发线程协作类condition" tabindex="-1"><a class="header-anchor" href="#深入理解java并发线程协作类condition" aria-hidden="true">#</a> 深入理解Java并发线程协作类Condition</h1><h2 id="condition简介" tabindex="-1"><a class="header-anchor" href="#condition简介" aria-hidden="true">#</a> Condition简介</h2><p>任何一个java对象都天然继承于Object类，在线程间实现通信的往往会应用到Object的几个方法：</p><ul><li>wait()</li><li>wait(long timeout)</li><li>wait(long timeout, int nanos)</li><li>notify()</li><li>notifyAll()</li></ul><p>同样的， 在java Lock体系下依然会有同样的方法实现等待/通知机制。</p><p>从整体上来看<strong>Object的wait和notify/notify是与对象监视器配合完成线程间的等待/通知机制，而Condition与Lock配合完成等待通知机制，前者是java底层级别的，后者是语言级别的，具有更高的可控制性和扩展性</strong>。</p><p>两者除了在使用方式上不同外，在<strong>功能特性</strong>上还是有很多的不同：</p><ol><li>Condition能够支持不响应中断，而通过使用Object方式不支持；</li><li>Condition能够支持多个等待队列（new 多个Condition对象），而Object方式只能支持一个；</li><li>Condition能够支持超时时间的设置，而Object不支持</li></ol><p>参照Object的wait和notify/notifyAll方法，Condition也提供了同样的方法：</p><p><strong>针对Object的wait方法</strong></p><ol><li><code>void await() throws InterruptedException</code>:当前线程进入等待状态，如果其他线程调用condition的signal或者signalAll方法并且当前线程获取Lock从await方法返回，如果在等待状态中被中断会抛出被中断异常；</li><li><code>long awaitNanos(long nanosTimeout)</code>：当前线程进入等待状态直到被通知，中断或者<strong>超时</strong>；</li><li><code>boolean await(long time, TimeUnit unit)throws InterruptedException</code>：同第二种，支持自定义时间单位</li><li><code>boolean awaitUntil(Date deadline) throws InterruptedException</code>：当前线程进入等待状态直到被通知，中断或者<strong>到了某个时间</strong></li></ol><p><strong>针对Object的<code>notify/notifyAll</code>方法</strong></p><ol><li><code>void signal()</code>：唤醒一个等待在condition上的线程，将该线程从<strong>等待队列</strong>中转移到<strong>同步队列</strong>中，如果在同步队列中能够竞争到Lock则可以从等待方法中返回。</li><li><code>void signalAll()</code>：与1的区别在于能够唤醒所有等待在condition上的线程</li></ol><h2 id="condition实现原理分析" tabindex="-1"><a class="header-anchor" href="#condition实现原理分析" aria-hidden="true">#</a> Condition实现原理分析</h2><h3 id="等待队列" tabindex="-1"><a class="header-anchor" href="#等待队列" aria-hidden="true">#</a> 等待队列</h3><p>要想能够深入的掌握condition还是应该知道它的实现原理，现在我们一起来看看condiiton的源码。</p><p>创建一个condition对象是通过<code>lock.newCondition()</code>,而这个方法实际上是会new出一个<strong>ConditionObject</strong>对象，该类是AQS的一个内部类。</p><p>前面我们说过，condition是要和lock配合使用的也就是condition和Lock是绑定在一起的，而lock的实现原理又依赖于AQS，自然而然ConditionObject就成为了AQS的一个内部类。</p><p>在锁机制的实现上，AQS内部维护了一个同步队列，如果是独占式锁的话，所有获取锁失败的线程的尾插入到<strong>同步队列</strong>，同样的，condition内部也是使用同样的方式，内部维护了一个 <strong>等待队列</strong>，所有调用condition.await方法的线程会加入到等待队列中，并且线程状态转换为等待状态。另外注意到ConditionObject中有两个成员变量：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token doc-comment comment">/** First node of condition queue. */</span>
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class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">2.11 并发编程</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/thread/wangzhe-thread.html" class="nav-link sidebar-link sidebar-page" aria-label="创建Java线程的3种方式"><!---->创建Java线程的3种方式<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/thread-state-and-method.html" class="nav-link sidebar-link sidebar-page" aria-label="线程的6种状态及切换"><!---->线程的6种状态及切换<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/thread-group-and-thread-priority.html" class="nav-link sidebar-link sidebar-page" aria-label="线程组和线程优先级"><!---->线程组和线程优先级<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/why-need-thread.html" class="nav-link sidebar-link sidebar-page" aria-label="进程与线程的区别"><!---->进程与线程的区别<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/thread-bring-some-problem.html" class="nav-link sidebar-link sidebar-page" aria-label="并发编程带来了哪些问题"><!---->并发编程带来了哪些问题<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/jmm.html" class="nav-link sidebar-link sidebar-page" aria-label="Java内存模型"><!---->Java内存模型<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/volatile.html" class="nav-link sidebar-link sidebar-page" aria-label="volatile"><!---->volatile<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/synchronized.html" class="nav-link sidebar-link sidebar-page" aria-label="synchronized"><!---->synchronized<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/cas.html" class="nav-link sidebar-link sidebar-page" aria-label="CAS的原理"><!---->CAS的原理<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/aqs.html" class="nav-link sidebar-link sidebar-page" aria-label="AQS详解"><!---->AQS详解<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/lock.html" class="nav-link sidebar-link sidebar-page" aria-label="锁"><!---->锁<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/reentrantLock.html" class="nav-link sidebar-link sidebar-page" aria-label="重入锁ReentrantLock"><!---->重入锁ReentrantLock<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ReentrantReadWriteLock.html" class="nav-link sidebar-link sidebar-page" aria-label="读写锁ReentrantReadWriteLock"><!---->读写锁ReentrantReadWriteLock<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/thread/condition.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="线程协作类Condition"><!---->线程协作类Condition<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/condition.html#condition简介" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="Condition简介"><!---->Condition简介<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/condition.html#condition实现原理分析" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="Condition实现原理分析"><!---->Condition实现原理分析<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/condition.html#等待队列" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="等待队列"><!---->等待队列<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/condition.html#await实现原理" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="await实现原理"><!---->await实现原理<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/condition.html#signal-signalall实现原理" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="signal/signalAll实现原理"><!---->signal/signalAll实现原理<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/condition.html#await与signal-signalall的结合思考" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="await与signal/signalAll的结合思考"><!---->await与signal/signalAll的结合思考<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/condition.html#一个例子" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="一个例子"><!---->一个例子<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/thread/LockSupport.html" class="nav-link sidebar-link sidebar-page" aria-label="线程阻塞唤醒类LockSupport"><!---->线程阻塞唤醒类LockSupport<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/map.html" class="nav-link sidebar-link sidebar-page" aria-label="并发集合容器"><!---->并发集合容器<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ConcurrentHashMap.html" class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentHashMap"><!---->ConcurrentHashMap<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ConcurrentLinkedQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentLinkedQueue"><!---->ConcurrentLinkedQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CopyOnWriteArrayList.html" class="nav-link sidebar-link sidebar-page" aria-label="CopyOnWriteArrayList"><!---->CopyOnWriteArrayList<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ThreadLocal.html" class="nav-link sidebar-link sidebar-page" aria-label="ThreadLocal"><!---->ThreadLocal<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/BlockingQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="BlockingQueue"><!---->BlockingQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/pool.html" class="nav-link sidebar-link sidebar-page" aria-label="线程池"><!---->线程池<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ScheduledThreadPoolExecutor.html" class="nav-link sidebar-link sidebar-page" aria-label="计划任务"><!---->计划任务<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/atomic.html" class="nav-link sidebar-link sidebar-page" aria-label="原子操作类"><!---->原子操作类<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CountDownLatch.html" class="nav-link sidebar-link sidebar-page" aria-label="通信工具类CountDownLatch"><!---->通信工具类CountDownLatch<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/fork-join.html" class="nav-link sidebar-link sidebar-page" aria-label="Fork/Join框架"><!---->Fork/Join框架<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/shengchanzhe-xiaofeizhe.html" class="nav-link sidebar-link sidebar-page" aria-label="生产者-消费者模式"><!---->生产者-消费者模式<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->深入理解Java并发线程协作类Condition</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 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class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/condition.html#condition简介" class="router-link-active router-link-exact-active toc-link level2">Condition简介</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/condition.html#condition实现原理分析" class="router-link-active router-link-exact-active toc-link level2">Condition实现原理分析</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/condition.html#等待队列" class="router-link-active router-link-exact-active toc-link level3">等待队列</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/condition.html#await实现原理" class="router-link-active router-link-exact-active toc-link level3">await实现原理</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/condition.html#signal-signalall实现原理" class="router-link-active router-link-exact-active toc-link level3">signal/signalAll实现原理</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/condition.html#await与signal-signalall的结合思考" class="router-link-active router-link-exact-active toc-link level2">await与signal/signalAll的结合思考</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/condition.html#一个例子" class="router-link-active router-link-exact-active toc-link level2">一个例子</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="深入理解java并发线程协作类condition" tabindex="-1"><a class="header-anchor" href="#深入理解java并发线程协作类condition" aria-hidden="true">#</a> 深入理解Java并发线程协作类Condition</h1><h2 id="condition简介" tabindex="-1"><a class="header-anchor" href="#condition简介" aria-hidden="true">#</a> Condition简介</h2><p>任何一个java对象都天然继承于Object类，在线程间实现通信的往往会应用到Object的几个方法：</p><ul><li>wait()</li><li>wait(long timeout)</li><li>wait(long timeout, int nanos)</li><li>notify()</li><li>notifyAll()</li></ul><p>同样的， 在java Lock体系下依然会有同样的方法实现等待/通知机制。</p><p>从整体上来看<strong>Object的wait和notify/notify是与对象监视器配合完成线程间的等待/通知机制，而Condition与Lock配合完成等待通知机制，前者是java底层级别的，后者是语言级别的，具有更高的可控制性和扩展性</strong>。</p><p>两者除了在使用方式上不同外，在<strong>功能特性</strong>上还是有很多的不同：</p><ol><li>Condition能够支持不响应中断，而通过使用Object方式不支持；</li><li>Condition能够支持多个等待队列（new 多个Condition对象），而Object方式只能支持一个；</li><li>Condition能够支持超时时间的设置，而Object不支持</li></ol><p>参照Object的wait和notify/notifyAll方法，Condition也提供了同样的方法：</p><p><strong>针对Object的wait方法</strong></p><ol><li><code>void await() throws InterruptedException</code>:当前线程进入等待状态，如果其他线程调用condition的signal或者signalAll方法并且当前线程获取Lock从await方法返回，如果在等待状态中被中断会抛出被中断异常；</li><li><code>long awaitNanos(long nanosTimeout)</code>：当前线程进入等待状态直到被通知，中断或者<strong>超时</strong>；</li><li><code>boolean await(long time, TimeUnit unit)throws InterruptedException</code>：同第二种，支持自定义时间单位</li><li><code>boolean awaitUntil(Date deadline) throws InterruptedException</code>：当前线程进入等待状态直到被通知，中断或者<strong>到了某个时间</strong></li></ol><p><strong>针对Object的<code>notify/notifyAll</code>方法</strong></p><ol><li><code>void signal()</code>：唤醒一个等待在condition上的线程，将该线程从<strong>等待队列</strong>中转移到<strong>同步队列</strong>中，如果在同步队列中能够竞争到Lock则可以从等待方法中返回。</li><li><code>void signalAll()</code>：与1的区别在于能够唤醒所有等待在condition上的线程</li></ol><h2 id="condition实现原理分析" tabindex="-1"><a class="header-anchor" href="#condition实现原理分析" aria-hidden="true">#</a> Condition实现原理分析</h2><h3 id="等待队列" tabindex="-1"><a class="header-anchor" href="#等待队列" aria-hidden="true">#</a> 等待队列</h3><p>要想能够深入的掌握condition还是应该知道它的实现原理，现在我们一起来看看condiiton的源码。</p><p>创建一个condition对象是通过<code>lock.newCondition()</code>,而这个方法实际上是会new出一个<strong>ConditionObject</strong>对象，该类是AQS的一个内部类。</p><p>前面我们说过，condition是要和lock配合使用的也就是condition和Lock是绑定在一起的，而lock的实现原理又依赖于AQS，自然而然ConditionObject就成为了AQS的一个内部类。</p><p>在锁机制的实现上，AQS内部维护了一个同步队列，如果是独占式锁的话，所有获取锁失败的线程的尾插入到<strong>同步队列</strong>，同样的，condition内部也是使用同样的方式，内部维护了一个 <strong>等待队列</strong>，所有调用condition.await方法的线程会加入到等待队列中，并且线程状态转换为等待状态。另外注意到ConditionObject中有两个成员变量：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token doc-comment comment">/** First node of condition queue. */</span>
 <span class="token keyword">private</span> <span class="token keyword">transient</span> <span class="token class-name">Node</span> firstWaiter<span class="token punctuation">;</span>
 <span class="token doc-comment comment">/** Last node of condition queue. */</span>
 <span class="token keyword">private</span> <span class="token keyword">transient</span> <span class="token class-name">Node</span> lastWaiter<span class="token punctuation">;</span>
@@ -238,6 +238,6 @@
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>输出结果为：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>Thread-0当前条件不满足等待
 Thread-0接收到通知，条件满足
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><p>开启了两个线程waiter和signaler，waiter线程开始执行的时候由于条件不满足，执行condition.await方法使该线程进入等待状态同时释放锁，signaler线程获取到锁之后更改条件，并通知所有的等待线程后释放锁。这时，waiter线程获取到锁，并由于signaler线程更改了条件此时相对于waiter来说条件满足，继续执行。</p><hr><blockquote><p>编辑：沉默王二，内容大部分来源以下三个开源仓库：</p><ul><li><a href="http://concurrent.redspider.group/" target="_blank" rel="noopener noreferrer">深入浅出 Java 多线程<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new 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aria-label="一、前言"><!---->一、前言<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">二、Java核心</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.1 Java概述</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.2 Java基础语法</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.3 面向对象编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.4 字符串&amp;数组</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.5 集合框架（容器）</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.6 IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">2.11 并发编程</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/thread/wangzhe-thread.html" class="nav-link sidebar-link sidebar-page" aria-label="创建Java线程的3种方式"><!---->创建Java线程的3种方式<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/thread-state-and-method.html" class="nav-link sidebar-link sidebar-page" aria-label="线程的6种状态及切换"><!---->线程的6种状态及切换<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/thread-group-and-thread-priority.html" class="nav-link sidebar-link sidebar-page" aria-label="线程组和线程优先级"><!---->线程组和线程优先级<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/why-need-thread.html" class="nav-link sidebar-link sidebar-page" aria-label="进程与线程的区别"><!---->进程与线程的区别<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/thread-bring-some-problem.html" class="nav-link sidebar-link sidebar-page" aria-label="并发编程带来了哪些问题"><!---->并发编程带来了哪些问题<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/jmm.html" class="nav-link sidebar-link sidebar-page" aria-label="Java内存模型"><!---->Java内存模型<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/volatile.html" class="nav-link sidebar-link sidebar-page" aria-label="volatile"><!---->volatile<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/synchronized.html" class="nav-link sidebar-link sidebar-page" aria-label="synchronized"><!---->synchronized<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/cas.html" class="nav-link sidebar-link sidebar-page" aria-label="CAS的原理"><!---->CAS的原理<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/aqs.html" class="nav-link sidebar-link sidebar-page" aria-label="AQS详解"><!---->AQS详解<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/lock.html" class="nav-link sidebar-link sidebar-page" aria-label="锁"><!---->锁<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/reentrantLock.html" class="nav-link sidebar-link sidebar-page" aria-label="重入锁ReentrantLock"><!---->重入锁ReentrantLock<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ReentrantReadWriteLock.html" class="nav-link sidebar-link sidebar-page" aria-label="读写锁ReentrantReadWriteLock"><!---->读写锁ReentrantReadWriteLock<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/condition.html" class="nav-link sidebar-link sidebar-page" aria-label="线程协作类Condition"><!---->线程协作类Condition<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/LockSupport.html" class="nav-link sidebar-link sidebar-page" aria-label="线程阻塞唤醒类LockSupport"><!---->线程阻塞唤醒类LockSupport<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/map.html" class="nav-link sidebar-link sidebar-page" aria-label="并发集合容器"><!---->并发集合容器<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ConcurrentHashMap.html" class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentHashMap"><!---->ConcurrentHashMap<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ConcurrentLinkedQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentLinkedQueue"><!---->ConcurrentLinkedQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CopyOnWriteArrayList.html" class="nav-link sidebar-link sidebar-page" aria-label="CopyOnWriteArrayList"><!---->CopyOnWriteArrayList<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ThreadLocal.html" class="nav-link sidebar-link sidebar-page" aria-label="ThreadLocal"><!---->ThreadLocal<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/BlockingQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="BlockingQueue"><!---->BlockingQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/pool.html" class="nav-link sidebar-link sidebar-page" aria-label="线程池"><!---->线程池<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ScheduledThreadPoolExecutor.html" class="nav-link sidebar-link sidebar-page" aria-label="计划任务"><!---->计划任务<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/atomic.html" class="nav-link sidebar-link sidebar-page" aria-label="原子操作类"><!---->原子操作类<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CountDownLatch.html" class="nav-link sidebar-link sidebar-page" aria-label="通信工具类CountDownLatch"><!---->通信工具类CountDownLatch<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/thread/fork-join.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="Fork/Join框架"><!---->Fork/Join框架<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/fork-join.html#什么是fork-join" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="什么是Fork/Join"><!---->什么是Fork/Join<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/fork-join.html#工作窃取算法" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="工作窃取算法"><!---->工作窃取算法<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/fork-join.html#fork-join的具体实现" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="Fork/Join的具体实现"><!---->Fork/Join的具体实现<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/fork-join.html#forkjointask" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="ForkJoinTask"><!---->ForkJoinTask<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/fork-join.html#forkjoinpool" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="ForkJoinPool"><!---->ForkJoinPool<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/fork-join.html#fork-join的使用" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="Fork/Join的使用"><!---->Fork/Join的使用<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/thread/shengchanzhe-xiaofeizhe.html" class="nav-link sidebar-link sidebar-page" aria-label="生产者-消费者模式"><!---->生产者-消费者模式<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->深入理解Java并发编程之Fork/Join框架</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月23日</span><meta property="datePublished" content="2022-03-23T12:08:58.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 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content="PT9M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/fork-join.html#什么是fork-join" class="router-link-active router-link-exact-active toc-link level2">什么是Fork/Join</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/fork-join.html#工作窃取算法" class="router-link-active router-link-exact-active toc-link level2">工作窃取算法</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/fork-join.html#fork-join的具体实现" class="router-link-active router-link-exact-active toc-link level2">Fork/Join的具体实现</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/fork-join.html#forkjointask" class="router-link-active router-link-exact-active toc-link level3">ForkJoinTask</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/fork-join.html#forkjoinpool" class="router-link-active router-link-exact-active toc-link level3">ForkJoinPool</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/fork-join.html#fork-join的使用" class="router-link-active router-link-exact-active toc-link level2">Fork/Join的使用</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h2 id="什么是fork-join" tabindex="-1"><a class="header-anchor" href="#什么是fork-join" aria-hidden="true">#</a> 什么是Fork/Join</h2><p>Fork/Join框架是一个实现了ExecutorService接口的多线程处理器，它专为那些可以通过递归分解成更细小的任务而设计，最大化的利用多核处理器来提高应用程序的性能。</p><p>与其他ExecutorService相关的实现相同的是，Fork/Join框架会将任务分配给线程池中的线程。而与之不同的是，Fork/Join框架在执行任务时使用了<strong>工作窃取算法</strong>。</p><p><strong>fork</strong>在英文里有分叉的意思，<strong>join</strong>在英文里连接、结合的意思。顾名思义，fork就是要使一个大任务分解成若干个小任务，而join就是最后将各个小任务的结果结合起来得到大任务的结果。</p><p>Fork/Join的运行流程大致如下所示：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/fork-join-ba0c0e3f-dc9b-445d-874a-5878503a98f7.png" alt="fork/join流程图"></p><p>需要注意的是，图里的次级子任务可以一直分下去，一直分到子任务足够小为止。用伪代码来表示如下：</p><div class="language-pseudocode ext-pseudocode line-numbers-mode"><pre class="language-pseudocode"><code>solve(任务):
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aria-label="CopyOnWriteArrayList"><!---->CopyOnWriteArrayList<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ThreadLocal.html" class="nav-link sidebar-link sidebar-page" aria-label="ThreadLocal"><!---->ThreadLocal<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/BlockingQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="BlockingQueue"><!---->BlockingQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/pool.html" class="nav-link sidebar-link sidebar-page" aria-label="线程池"><!---->线程池<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ScheduledThreadPoolExecutor.html" class="nav-link sidebar-link sidebar-page" aria-label="计划任务"><!---->计划任务<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/atomic.html" class="nav-link sidebar-link sidebar-page" aria-label="原子操作类"><!---->原子操作类<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CountDownLatch.html" class="nav-link sidebar-link sidebar-page" aria-label="通信工具类CountDownLatch"><!---->通信工具类CountDownLatch<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/thread/fork-join.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="Fork/Join框架"><!---->Fork/Join框架<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/fork-join.html#什么是fork-join" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="什么是Fork/Join"><!---->什么是Fork/Join<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/fork-join.html#工作窃取算法" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="工作窃取算法"><!---->工作窃取算法<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/fork-join.html#fork-join的具体实现" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="Fork/Join的具体实现"><!---->Fork/Join的具体实现<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/fork-join.html#forkjointask" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="ForkJoinTask"><!---->ForkJoinTask<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/fork-join.html#forkjoinpool" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="ForkJoinPool"><!---->ForkJoinPool<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/fork-join.html#fork-join的使用" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="Fork/Join的使用"><!---->Fork/Join的使用<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/thread/shengchanzhe-xiaofeizhe.html" class="nav-link sidebar-link sidebar-page" aria-label="生产者-消费者模式"><!---->生产者-消费者模式<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->深入理解Java并发编程之Fork/Join框架</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月23日</span><meta property="datePublished" content="2022-03-23T12:08:58.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><li class="category category6" role>并发编程</li><meta property="articleSection" content="Java核心,并发编程"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 9 分钟</span><meta property="timeRequired" content="PT9M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/fork-join.html#什么是fork-join" class="router-link-active router-link-exact-active toc-link level2">什么是Fork/Join</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/fork-join.html#工作窃取算法" class="router-link-active router-link-exact-active toc-link level2">工作窃取算法</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/fork-join.html#fork-join的具体实现" class="router-link-active router-link-exact-active toc-link level2">Fork/Join的具体实现</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/fork-join.html#forkjointask" class="router-link-active router-link-exact-active toc-link level3">ForkJoinTask</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/fork-join.html#forkjoinpool" class="router-link-active router-link-exact-active toc-link level3">ForkJoinPool</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/fork-join.html#fork-join的使用" class="router-link-active router-link-exact-active toc-link level2">Fork/Join的使用</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h2 id="什么是fork-join" tabindex="-1"><a class="header-anchor" href="#什么是fork-join" aria-hidden="true">#</a> 什么是Fork/Join</h2><p>Fork/Join框架是一个实现了ExecutorService接口的多线程处理器，它专为那些可以通过递归分解成更细小的任务而设计，最大化的利用多核处理器来提高应用程序的性能。</p><p>与其他ExecutorService相关的实现相同的是，Fork/Join框架会将任务分配给线程池中的线程。而与之不同的是，Fork/Join框架在执行任务时使用了<strong>工作窃取算法</strong>。</p><p><strong>fork</strong>在英文里有分叉的意思，<strong>join</strong>在英文里连接、结合的意思。顾名思义，fork就是要使一个大任务分解成若干个小任务，而join就是最后将各个小任务的结果结合起来得到大任务的结果。</p><p>Fork/Join的运行流程大致如下所示：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/fork-join-ba0c0e3f-dc9b-445d-874a-5878503a98f7.png" alt="fork/join流程图"></p><p>需要注意的是，图里的次级子任务可以一直分下去，一直分到子任务足够小为止。用伪代码来表示如下：</p><div class="language-pseudocode ext-pseudocode line-numbers-mode"><pre class="language-pseudocode"><code>solve(任务):
     if(任务已经划分到足够小):
         顺序执行任务
     else:
@@ -222,6 +222,6 @@
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>上面例子在笔者所用电脑的输出为：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>计算结果:102334155
 耗时：0 millis
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><p>这里耗时为0不代表没有耗时，是表明这里计算的耗时几乎可以忽略不计，大家可以在自己的电脑试试，即使是n取大很多量级的数据（注意int溢出的问题）耗时也是很短的，或者可以用System.nanoTime()统计纳秒的时间。</p><p>为什么在这里普通的递归或循环效率更快呢？因为Fork/Join是使用多个线程协作来计算的，所以会有线程通信和线程切换的开销。</p><p>如果要计算的任务比较简单（比如我们案例中的斐波那契数列），那当然是直接使用单线程会更快一些。但如果要计算的东西比较复杂，计算机又是多核的情况下，就可以充分利用多核CPU来提高计算速度。</p><p>另外，Java 8 Stream的并行操作底层就是用到了Fork/Join框架，下一章我们将从源码及案例两方面介绍Java 8 Stream的并行操作。</p><hr><blockquote><p>编辑：沉默王二，内容大部分来源以下三个开源仓库：</p><ul><li><a href="http://concurrent.redspider.group/" target="_blank" rel="noopener noreferrer">深入浅出 Java 多线程<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon 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class="nav-link sidebar-link sidebar-page" aria-label="synchronized"><!---->synchronized<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/cas.html" class="nav-link sidebar-link sidebar-page" aria-label="CAS的原理"><!---->CAS的原理<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/aqs.html" class="nav-link sidebar-link sidebar-page" aria-label="AQS详解"><!---->AQS详解<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/lock.html" class="nav-link sidebar-link sidebar-page" aria-label="锁"><!---->锁<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/reentrantLock.html" class="nav-link sidebar-link sidebar-page" aria-label="重入锁ReentrantLock"><!---->重入锁ReentrantLock<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ReentrantReadWriteLock.html" class="nav-link sidebar-link sidebar-page" 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class="nav-link sidebar-link sidebar-page" aria-label="计划任务"><!---->计划任务<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/atomic.html" class="nav-link sidebar-link sidebar-page" aria-label="原子操作类"><!---->原子操作类<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CountDownLatch.html" class="nav-link sidebar-link sidebar-page" aria-label="通信工具类CountDownLatch"><!---->通信工具类CountDownLatch<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/fork-join.html" class="nav-link sidebar-link sidebar-page" aria-label="Fork/Join框架"><!---->Fork/Join框架<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/shengchanzhe-xiaofeizhe.html" class="nav-link sidebar-link sidebar-page" aria-label="生产者-消费者模式"><!---->生产者-消费者模式<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->全面理解Java的内存模型（JMM）</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" 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17 分钟</span><meta property="timeRequired" content="PT17M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/jmm.html#并发编程模型的两个关键问题" class="router-link-active router-link-exact-active toc-link level2">并发编程模型的两个关键问题</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/jmm.html#java内存模型的抽象结构" class="router-link-active router-link-exact-active toc-link level2">Java内存模型的抽象结构</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/jmm.html#运行时内存的划分" class="router-link-active router-link-exact-active toc-link level3">运行时内存的划分</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/jmm.html#既然堆是共享的-为什么在堆中会有内存不可见问题" class="router-link-active router-link-exact-active toc-link level3">既然堆是共享的，为什么在堆中会有内存不可见问题？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/jmm.html#jmm与java内存区域划分的区别与联系" class="router-link-active router-link-exact-active toc-link level3">JMM与Java内存区域划分的区别与联系</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/jmm.html#什么是重排序" class="router-link-active router-link-exact-active toc-link level2">什么是重排序？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/jmm.html#顺序一致性模型与jmm的保证" class="router-link-active router-link-exact-active toc-link level2">顺序一致性模型与JMM的保证</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/jmm.html#数据竞争与顺序一致性" class="router-link-active router-link-exact-active toc-link level3">数据竞争与顺序一致性</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/jmm.html#顺序一致性模型" class="router-link-active router-link-exact-active toc-link level3">顺序一致性模型</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/jmm.html#jmm中同步程序的顺序一致性效果" class="router-link-active router-link-exact-active toc-link level3">JMM中同步程序的顺序一致性效果</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/jmm.html#jmm中未同步程序的顺序一致性效果" class="router-link-active router-link-exact-active toc-link level3">JMM中未同步程序的顺序一致性效果</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/jmm.html#happens-before" class="router-link-active router-link-exact-active toc-link level2">happens-before</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/jmm.html#什么是happens-before" class="router-link-active router-link-exact-active toc-link level3">什么是happens-before?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/jmm.html#天然的happens-before关系" class="router-link-active router-link-exact-active toc-link level3">天然的happens-before关系</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="全面理解java的内存模型-jmm" tabindex="-1"><a class="header-anchor" href="#全面理解java的内存模型-jmm" aria-hidden="true">#</a> 全面理解Java的内存模型（JMM）</h1><p>在面试中，面试官经常喜欢问：『说说什么是Java内存模型(JMM)？』</p><p>面试者内心狂喜，这题刚背过：『Java内存主要分为五大块：堆、方法区、虚拟机栈、本地方法栈、PC寄存器，balabala……』</p><p>面试官会心一笑，露出一道光芒：『好了，今天的面试先到这里了，回去等通知吧』</p><p>一般听到等通知这句话，这场面试大概率就是凉凉了。为什么呢？因为面试者弄错了概念，面试官是想考察JMM，但是面试者一听到<code>Java内存</code>这几个关键字就开始背诵八股文了。Java内存模型(JMM)和Java运行时内存区域区别可大了呢，不要走开接着往下看，答应我要看完。</p><h2 id="并发编程模型的两个关键问题" tabindex="-1"><a class="header-anchor" href="#并发编程模型的两个关键问题" aria-hidden="true">#</a> 并发编程模型的两个关键问题</h2><ul><li>线程间如何通信？即：线程之间以何种机制来交换信息</li><li>线程间如何同步？即：线程以何种机制来控制不同线程间操作发生的相对顺序</li></ul><p>有两种并发模型可以解决这两个问题：</p><ul><li>消息传递并发模型</li><li>共享内存并发模型</li></ul><p>这两种模型之间的区别如下表所示：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/jmm-a610752d-ef73-47f2-b02c-6954eb3d62bf.png" alt="两种并发模型的比较"></p><p><strong>在Java中，使用的是共享内存并发模型</strong>。</p><h2 id="java内存模型的抽象结构" tabindex="-1"><a class="header-anchor" href="#java内存模型的抽象结构" aria-hidden="true">#</a> Java内存模型的抽象结构</h2><h3 id="运行时内存的划分" tabindex="-1"><a class="header-anchor" href="#运行时内存的划分" aria-hidden="true">#</a> 运行时内存的划分</h3><p>先谈一下运行时数据区，下面这张图相信大家一点都不陌生： <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/jmm-0b9e4b1e-90e2-41bb-be89-f65e3a10fa08.png" alt="Java运行时数据区域"></p><p>对于每一个线程来说，栈都是私有的，而堆是共有的。</p><p>也就是说在栈中的变量（局部变量、方法定义参数、异常处理器参数）不会在线程之间共享，也就不会有内存可见性（下文会说到）的问题，也不受内存模型的影响。而在堆中的变量是共享的，本文称为共享变量。</p><p>所以，内存可见性是针对的<strong>共享变量</strong>。</p><h3 id="既然堆是共享的-为什么在堆中会有内存不可见问题" tabindex="-1"><a class="header-anchor" href="#既然堆是共享的-为什么在堆中会有内存不可见问题" aria-hidden="true">#</a> 既然堆是共享的，为什么在堆中会有内存不可见问题？</h3><p>这是因为现代计算机为了高效，往往会在高速缓存区中缓存共享变量，因为cpu访问缓存区比访问内存要快得多。</p><blockquote><p>线程之间的共享变量存在主内存中，每个线程都有一个私有的本地内存，存储了该线程以读、写共享变量的副本。本地内存是Java内存模型的一个抽象概念，并不真实存在。它涵盖了缓存、写缓冲区、寄存器等。</p></blockquote><p>Java线程之间的通信由Java内存模型（简称JMM）控制，从抽象的角度来说，JMM定义了线程和主内存之间的抽象关系。JMM的抽象示意图如图所示：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/jmm-f02219aa-e762-4df0-ac08-6f4cceb535c2.jpg" alt="JMM抽象示意图"></p><p>从图中可以看出：</p><ol><li>所有的共享变量都存在主内存中。</li><li>每个线程都保存了一份该线程使用到的共享变量的副本。</li><li>如果线程A与线程B之间要通信的话，必须经历下面2个步骤： <ol><li>线程A将本地内存A中更新过的共享变量刷新到主内存中去。</li><li>线程B到主内存中去读取线程A之前已经更新过的共享变量。</li></ol></li></ol><p><strong>所以，线程A无法直接访问线程B的工作内存，线程间通信必须经过主内存。</strong></p><p>注意，根据JMM的规定，<strong>线程对共享变量的所有操作都必须在自己的本地内存中进行，不能直接从主内存中读取</strong>。</p><p>所以线程B并不是直接去主内存中读取共享变量的值，而是先在本地内存B中找到这个共享变量，发现这个共享变量已经被更新了，然后本地内存B去主内存中读取这个共享变量的新值，并拷贝到本地内存B中，最后线程B再读取本地内存B中的新值。</p><p>那么怎么知道这个共享变量的被其他线程更新了呢？这就是JMM的功劳了，也是JMM存在的必要性之一。<strong>JMM通过控制主内存与每个线程的本地内存之间的交互，来提供内存可见性保证</strong>。</p><blockquote><p>Java中的volatile关键字可以保证多线程操作共享变量的可见性以及禁止指令重排序，synchronized关键字不仅保证可见性，同时也保证了原子性（互斥性）。在更底层，JMM通过内存屏障来实现内存的可见性以及禁止重排序。为了程序员的方便理解，提出了happens-before，它更加的简单易懂，从而避免了程序员为了理解内存可见性而去学习复杂的重排序规则以及这些规则的具体实现方法。这里涉及到的所有内容后面都会有专门的章节介绍。</p></blockquote><h3 id="jmm与java内存区域划分的区别与联系" tabindex="-1"><a class="header-anchor" href="#jmm与java内存区域划分的区别与联系" aria-hidden="true">#</a> JMM与Java内存区域划分的区别与联系</h3><p>上面两小节分别提到了JMM和Java运行时内存区域的划分，这两者既有差别又有联系：</p><ul><li><p>区别</p><p>两者是不同的概念层次。JMM是抽象的，他是用来描述一组规则，通过这个规则来控制各个变量的访问方式，围绕原子性、有序性、可见性等展开的。而Java运行时内存的划分是具体的，是JVM运行Java程序时，必要的内存划分。</p></li><li><p>联系</p><p>都存在私有数据区域和共享数据区域。一般来说，JMM中的主内存属于共享数据区域，他是包含了堆和方法区；同样，JMM中的本地内存属于私有数据区域，包含了程序计数器、本地方法栈、虚拟机栈。</p></li></ul><p><strong>实际上，他们表达的是同一种含义，这里不做区分。</strong></p><h2 id="什么是重排序" tabindex="-1"><a class="header-anchor" href="#什么是重排序" aria-hidden="true">#</a> 什么是重排序？</h2><p>计算机在执行程序时，为了提高性能，编译器和处理器常常会对指令做重排。</p><p><strong>为什么指令重排序可以提高性能？</strong></p><p>简单地说，每一个指令都会包含多个步骤，每个步骤可能使用不同的硬件。因此，<strong>流水线技术</strong>产生了，它的原理是指令1还没有执行完，就可以开始执行指令2，而不用等到指令1执行结束之后再执行指令2，这样就大大提高了效率。</p><p>但是，流水线技术最害怕<strong>中断</strong>，恢复中断的代价是比较大的，所以我们要想尽办法不让流水线中断。指令重排就是减少中断的一种技术。</p><p>我们分析一下下面这个代码的执行情况：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code>a <span class="token operator">=</span> b <span class="token operator">+</span> c<span class="token punctuation">;</span>
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class="sidebar-heading clickable"><!----><span class="title">2.6 IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">2.11 并发编程</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/thread/wangzhe-thread.html" class="nav-link sidebar-link sidebar-page" aria-label="创建Java线程的3种方式"><!---->创建Java线程的3种方式<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/thread-state-and-method.html" class="nav-link sidebar-link sidebar-page" aria-label="线程的6种状态及切换"><!---->线程的6种状态及切换<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/thread-group-and-thread-priority.html" class="nav-link sidebar-link sidebar-page" aria-label="线程组和线程优先级"><!---->线程组和线程优先级<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/why-need-thread.html" class="nav-link sidebar-link sidebar-page" aria-label="进程与线程的区别"><!---->进程与线程的区别<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/thread-bring-some-problem.html" class="nav-link sidebar-link sidebar-page" aria-label="并发编程带来了哪些问题"><!---->并发编程带来了哪些问题<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/thread/jmm.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="Java内存模型"><!---->Java内存模型<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/jmm.html#并发编程模型的两个关键问题" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="并发编程模型的两个关键问题"><!---->并发编程模型的两个关键问题<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/jmm.html#java内存模型的抽象结构" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="Java内存模型的抽象结构"><!---->Java内存模型的抽象结构<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/jmm.html#运行时内存的划分" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="运行时内存的划分"><!---->运行时内存的划分<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/jmm.html#既然堆是共享的-为什么在堆中会有内存不可见问题" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="既然堆是共享的，为什么在堆中会有内存不可见问题？"><!---->既然堆是共享的，为什么在堆中会有内存不可见问题？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/jmm.html#jmm与java内存区域划分的区别与联系" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="JMM与Java内存区域划分的区别与联系"><!---->JMM与Java内存区域划分的区别与联系<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/jmm.html#什么是重排序" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="什么是重排序？"><!---->什么是重排序？<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/jmm.html#顺序一致性模型与jmm的保证" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="顺序一致性模型与JMM的保证"><!---->顺序一致性模型与JMM的保证<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/jmm.html#数据竞争与顺序一致性" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="数据竞争与顺序一致性"><!---->数据竞争与顺序一致性<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/jmm.html#顺序一致性模型" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="顺序一致性模型"><!---->顺序一致性模型<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/jmm.html#jmm中同步程序的顺序一致性效果" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="JMM中同步程序的顺序一致性效果"><!---->JMM中同步程序的顺序一致性效果<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/jmm.html#jmm中未同步程序的顺序一致性效果" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="JMM中未同步程序的顺序一致性效果"><!---->JMM中未同步程序的顺序一致性效果<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/jmm.html#happens-before" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="happens-before"><!---->happens-before<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/jmm.html#什么是happens-before" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="什么是happens-before?"><!---->什么是happens-before?<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/jmm.html#天然的happens-before关系" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="天然的happens-before关系"><!---->天然的happens-before关系<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li></ul><!--]--></li><li><!--[--><a href="/thread/volatile.html" class="nav-link sidebar-link sidebar-page" aria-label="volatile"><!---->volatile<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/synchronized.html" class="nav-link sidebar-link sidebar-page" aria-label="synchronized"><!---->synchronized<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/cas.html" class="nav-link sidebar-link sidebar-page" aria-label="CAS的原理"><!---->CAS的原理<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/aqs.html" class="nav-link sidebar-link sidebar-page" aria-label="AQS详解"><!---->AQS详解<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/lock.html" class="nav-link sidebar-link sidebar-page" aria-label="锁"><!---->锁<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/reentrantLock.html" class="nav-link sidebar-link sidebar-page" aria-label="重入锁ReentrantLock"><!---->重入锁ReentrantLock<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ReentrantReadWriteLock.html" class="nav-link sidebar-link sidebar-page" aria-label="读写锁ReentrantReadWriteLock"><!---->读写锁ReentrantReadWriteLock<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/condition.html" class="nav-link sidebar-link sidebar-page" aria-label="线程协作类Condition"><!---->线程协作类Condition<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/LockSupport.html" class="nav-link sidebar-link sidebar-page" aria-label="线程阻塞唤醒类LockSupport"><!---->线程阻塞唤醒类LockSupport<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/map.html" class="nav-link sidebar-link sidebar-page" aria-label="并发集合容器"><!---->并发集合容器<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ConcurrentHashMap.html" class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentHashMap"><!---->ConcurrentHashMap<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ConcurrentLinkedQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentLinkedQueue"><!---->ConcurrentLinkedQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CopyOnWriteArrayList.html" class="nav-link sidebar-link sidebar-page" aria-label="CopyOnWriteArrayList"><!---->CopyOnWriteArrayList<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ThreadLocal.html" class="nav-link sidebar-link sidebar-page" aria-label="ThreadLocal"><!---->ThreadLocal<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/BlockingQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="BlockingQueue"><!---->BlockingQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/pool.html" class="nav-link sidebar-link sidebar-page" aria-label="线程池"><!---->线程池<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ScheduledThreadPoolExecutor.html" class="nav-link sidebar-link sidebar-page" aria-label="计划任务"><!---->计划任务<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/atomic.html" class="nav-link sidebar-link sidebar-page" aria-label="原子操作类"><!---->原子操作类<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CountDownLatch.html" class="nav-link sidebar-link sidebar-page" aria-label="通信工具类CountDownLatch"><!---->通信工具类CountDownLatch<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/fork-join.html" class="nav-link sidebar-link sidebar-page" aria-label="Fork/Join框架"><!---->Fork/Join框架<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/shengchanzhe-xiaofeizhe.html" class="nav-link sidebar-link sidebar-page" aria-label="生产者-消费者模式"><!---->生产者-消费者模式<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->全面理解Java的内存模型（JMM）</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月23日</span><meta property="datePublished" content="2022-03-23T12:08:58.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 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class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/jmm.html#并发编程模型的两个关键问题" class="router-link-active router-link-exact-active toc-link level2">并发编程模型的两个关键问题</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/jmm.html#java内存模型的抽象结构" class="router-link-active router-link-exact-active toc-link level2">Java内存模型的抽象结构</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/jmm.html#运行时内存的划分" class="router-link-active router-link-exact-active toc-link level3">运行时内存的划分</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/jmm.html#既然堆是共享的-为什么在堆中会有内存不可见问题" class="router-link-active router-link-exact-active toc-link level3">既然堆是共享的，为什么在堆中会有内存不可见问题？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/jmm.html#jmm与java内存区域划分的区别与联系" class="router-link-active router-link-exact-active toc-link level3">JMM与Java内存区域划分的区别与联系</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/jmm.html#什么是重排序" class="router-link-active router-link-exact-active toc-link level2">什么是重排序？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/jmm.html#顺序一致性模型与jmm的保证" class="router-link-active router-link-exact-active toc-link level2">顺序一致性模型与JMM的保证</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/jmm.html#数据竞争与顺序一致性" class="router-link-active router-link-exact-active toc-link level3">数据竞争与顺序一致性</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/jmm.html#顺序一致性模型" class="router-link-active router-link-exact-active toc-link level3">顺序一致性模型</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/jmm.html#jmm中同步程序的顺序一致性效果" class="router-link-active router-link-exact-active toc-link level3">JMM中同步程序的顺序一致性效果</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/jmm.html#jmm中未同步程序的顺序一致性效果" class="router-link-active router-link-exact-active toc-link level3">JMM中未同步程序的顺序一致性效果</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/jmm.html#happens-before" class="router-link-active router-link-exact-active toc-link level2">happens-before</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/jmm.html#什么是happens-before" class="router-link-active router-link-exact-active toc-link level3">什么是happens-before?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/jmm.html#天然的happens-before关系" class="router-link-active router-link-exact-active toc-link level3">天然的happens-before关系</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="全面理解java的内存模型-jmm" tabindex="-1"><a class="header-anchor" href="#全面理解java的内存模型-jmm" aria-hidden="true">#</a> 全面理解Java的内存模型（JMM）</h1><p>在面试中，面试官经常喜欢问：『说说什么是Java内存模型(JMM)？』</p><p>面试者内心狂喜，这题刚背过：『Java内存主要分为五大块：堆、方法区、虚拟机栈、本地方法栈、PC寄存器，balabala……』</p><p>面试官会心一笑，露出一道光芒：『好了，今天的面试先到这里了，回去等通知吧』</p><p>一般听到等通知这句话，这场面试大概率就是凉凉了。为什么呢？因为面试者弄错了概念，面试官是想考察JMM，但是面试者一听到<code>Java内存</code>这几个关键字就开始背诵八股文了。Java内存模型(JMM)和Java运行时内存区域区别可大了呢，不要走开接着往下看，答应我要看完。</p><h2 id="并发编程模型的两个关键问题" tabindex="-1"><a class="header-anchor" href="#并发编程模型的两个关键问题" aria-hidden="true">#</a> 并发编程模型的两个关键问题</h2><ul><li>线程间如何通信？即：线程之间以何种机制来交换信息</li><li>线程间如何同步？即：线程以何种机制来控制不同线程间操作发生的相对顺序</li></ul><p>有两种并发模型可以解决这两个问题：</p><ul><li>消息传递并发模型</li><li>共享内存并发模型</li></ul><p>这两种模型之间的区别如下表所示：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/jmm-a610752d-ef73-47f2-b02c-6954eb3d62bf.png" alt="两种并发模型的比较"></p><p><strong>在Java中，使用的是共享内存并发模型</strong>。</p><h2 id="java内存模型的抽象结构" tabindex="-1"><a class="header-anchor" href="#java内存模型的抽象结构" aria-hidden="true">#</a> Java内存模型的抽象结构</h2><h3 id="运行时内存的划分" tabindex="-1"><a class="header-anchor" href="#运行时内存的划分" aria-hidden="true">#</a> 运行时内存的划分</h3><p>先谈一下运行时数据区，下面这张图相信大家一点都不陌生： <img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/jmm-0b9e4b1e-90e2-41bb-be89-f65e3a10fa08.png" alt="Java运行时数据区域"></p><p>对于每一个线程来说，栈都是私有的，而堆是共有的。</p><p>也就是说在栈中的变量（局部变量、方法定义参数、异常处理器参数）不会在线程之间共享，也就不会有内存可见性（下文会说到）的问题，也不受内存模型的影响。而在堆中的变量是共享的，本文称为共享变量。</p><p>所以，内存可见性是针对的<strong>共享变量</strong>。</p><h3 id="既然堆是共享的-为什么在堆中会有内存不可见问题" tabindex="-1"><a class="header-anchor" href="#既然堆是共享的-为什么在堆中会有内存不可见问题" aria-hidden="true">#</a> 既然堆是共享的，为什么在堆中会有内存不可见问题？</h3><p>这是因为现代计算机为了高效，往往会在高速缓存区中缓存共享变量，因为cpu访问缓存区比访问内存要快得多。</p><blockquote><p>线程之间的共享变量存在主内存中，每个线程都有一个私有的本地内存，存储了该线程以读、写共享变量的副本。本地内存是Java内存模型的一个抽象概念，并不真实存在。它涵盖了缓存、写缓冲区、寄存器等。</p></blockquote><p>Java线程之间的通信由Java内存模型（简称JMM）控制，从抽象的角度来说，JMM定义了线程和主内存之间的抽象关系。JMM的抽象示意图如图所示：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/jmm-f02219aa-e762-4df0-ac08-6f4cceb535c2.jpg" alt="JMM抽象示意图"></p><p>从图中可以看出：</p><ol><li>所有的共享变量都存在主内存中。</li><li>每个线程都保存了一份该线程使用到的共享变量的副本。</li><li>如果线程A与线程B之间要通信的话，必须经历下面2个步骤： <ol><li>线程A将本地内存A中更新过的共享变量刷新到主内存中去。</li><li>线程B到主内存中去读取线程A之前已经更新过的共享变量。</li></ol></li></ol><p><strong>所以，线程A无法直接访问线程B的工作内存，线程间通信必须经过主内存。</strong></p><p>注意，根据JMM的规定，<strong>线程对共享变量的所有操作都必须在自己的本地内存中进行，不能直接从主内存中读取</strong>。</p><p>所以线程B并不是直接去主内存中读取共享变量的值，而是先在本地内存B中找到这个共享变量，发现这个共享变量已经被更新了，然后本地内存B去主内存中读取这个共享变量的新值，并拷贝到本地内存B中，最后线程B再读取本地内存B中的新值。</p><p>那么怎么知道这个共享变量的被其他线程更新了呢？这就是JMM的功劳了，也是JMM存在的必要性之一。<strong>JMM通过控制主内存与每个线程的本地内存之间的交互，来提供内存可见性保证</strong>。</p><blockquote><p>Java中的volatile关键字可以保证多线程操作共享变量的可见性以及禁止指令重排序，synchronized关键字不仅保证可见性，同时也保证了原子性（互斥性）。在更底层，JMM通过内存屏障来实现内存的可见性以及禁止重排序。为了程序员的方便理解，提出了happens-before，它更加的简单易懂，从而避免了程序员为了理解内存可见性而去学习复杂的重排序规则以及这些规则的具体实现方法。这里涉及到的所有内容后面都会有专门的章节介绍。</p></blockquote><h3 id="jmm与java内存区域划分的区别与联系" tabindex="-1"><a class="header-anchor" href="#jmm与java内存区域划分的区别与联系" aria-hidden="true">#</a> JMM与Java内存区域划分的区别与联系</h3><p>上面两小节分别提到了JMM和Java运行时内存区域的划分，这两者既有差别又有联系：</p><ul><li><p>区别</p><p>两者是不同的概念层次。JMM是抽象的，他是用来描述一组规则，通过这个规则来控制各个变量的访问方式，围绕原子性、有序性、可见性等展开的。而Java运行时内存的划分是具体的，是JVM运行Java程序时，必要的内存划分。</p></li><li><p>联系</p><p>都存在私有数据区域和共享数据区域。一般来说，JMM中的主内存属于共享数据区域，他是包含了堆和方法区；同样，JMM中的本地内存属于私有数据区域，包含了程序计数器、本地方法栈、虚拟机栈。</p></li></ul><p><strong>实际上，他们表达的是同一种含义，这里不做区分。</strong></p><h2 id="什么是重排序" tabindex="-1"><a class="header-anchor" href="#什么是重排序" aria-hidden="true">#</a> 什么是重排序？</h2><p>计算机在执行程序时，为了提高性能，编译器和处理器常常会对指令做重排。</p><p><strong>为什么指令重排序可以提高性能？</strong></p><p>简单地说，每一个指令都会包含多个步骤，每个步骤可能使用不同的硬件。因此，<strong>流水线技术</strong>产生了，它的原理是指令1还没有执行完，就可以开始执行指令2，而不用等到指令1执行结束之后再执行指令2，这样就大大提高了效率。</p><p>但是，流水线技术最害怕<strong>中断</strong>，恢复中断的代价是比较大的，所以我们要想尽办法不让流水线中断。指令重排就是减少中断的一种技术。</p><p>我们分析一下下面这个代码的执行情况：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code>a <span class="token operator">=</span> b <span class="token operator">+</span> c<span class="token punctuation">;</span>
 d <span class="token operator">=</span> e <span class="token operator">-</span> f <span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><p>先加载b、c（<strong>注意，即有可能先加载b，也有可能先加载c</strong>），但是在执行add(b,c)的时候，需要等待b、c装载结束才能继续执行，也就是增加了停顿，那么后面的指令也会依次有停顿,这降低了计算机的执行效率。</p><p>为了减少这个停顿，我们可以先加载e和f,然后再去加载add(b,c),这样做对程序（串行）是没有影响的,但却减少了停顿。既然add(b,c)需要停顿，那还不如去做一些有意义的事情。</p><p>综上所述，<strong>指令重排对于提高CPU处理性能十分必要。虽然由此带来了乱序的问题，但是这点牺牲是值得的。</strong></p><p>指令重排一般分为以下三种：</p><ul><li><p><strong>编译器优化重排</strong></p><p>编译器在<strong>不改变单线程程序语义</strong>的前提下，可以重新安排语句的执行顺序。</p></li><li><p><strong>指令并行重排</strong></p><p>现代处理器采用了指令级并行技术来将多条指令重叠执行。如果<strong>不存在数据依赖性</strong>(即后一个执行的语句无需依赖前面执行的语句的结果)，处理器可以改变语句对应的机器指令的执行顺序。</p></li><li><p><strong>内存系统重排</strong></p><p>由于处理器使用缓存和读写缓存冲区，这使得加载(load)和存储(store)操作看上去可能是在乱序执行，因为三级缓存的存在，导致内存与缓存的数据同步存在时间差。</p></li></ul><p><strong>指令重排可以保证串行语义一致，但是没有义务保证多线程间的语义也一致</strong>。所以在多线程下，指令重排序可能会导致一些问题。</p><h2 id="顺序一致性模型与jmm的保证" tabindex="-1"><a class="header-anchor" href="#顺序一致性模型与jmm的保证" aria-hidden="true">#</a> 顺序一致性模型与JMM的保证</h2><p>顺序一致性模型是一个<strong>理论参考模型</strong>，内存模型在设计的时候都会以顺序一致性内存模型作为参考。</p><h3 id="数据竞争与顺序一致性" tabindex="-1"><a class="header-anchor" href="#数据竞争与顺序一致性" aria-hidden="true">#</a> 数据竞争与顺序一致性</h3><p>当程序未正确同步的时候，就可能存在数据竞争。</p><blockquote><p>数据竞争：在一个线程中写一个变量，在另一个线程读同一个变量，并且写和读没有通过同步来排序。</p></blockquote><p>如果程序中包含了数据竞争，那么运行的结果往往充满了<strong>不确定性</strong>，比如读发生在了写之前，可能就会读到错误的值；如果一个线程程序能够正确同步，那么就不存在数据竞争。</p><p>Java内存模型（JMM）对于正确同步多线程程序的内存一致性做了以下保证：</p><blockquote><p><strong>如果程序是正确同步的，程序的执行将具有顺序一致性</strong>。 即程序的执行结果和该程序在顺序一致性模型中执行的结果相同。</p></blockquote><p>这里的同步包括了使用<code>volatile</code>、<code>final</code>、<code>synchronized</code>等关键字来实现<strong>多线程下的同步</strong>。</p><p>如果程序员没有正确使用<code>volatile</code>、<code>final</code>、<code>synchronized</code>，那么即便是使用了同步（单线程下的同步），JMM也不会有内存可见性的保证，可能会导致你的程序出错，并且具有不可重现性，很难排查。</p><p>所以如何正确使用<code>volatile</code>、<code>final</code>、<code>synchronized</code>，是程序员应该去了解的。后面会有专门的章节介绍这几个关键字的内存语义及使用。</p><h3 id="顺序一致性模型" tabindex="-1"><a class="header-anchor" href="#顺序一致性模型" aria-hidden="true">#</a> 顺序一致性模型</h3><p>顺序一致性内存模型是一个<strong>理想化的理论参考模型</strong>，它为程序员提供了极强的内存可见性保证。</p><p>顺序一致性模型有两大特性：</p><ul><li><p>一个线程中的所有操作必须按照程序的顺序（即Java代码的顺序）来执行。</p></li><li><p>不管程序是否同步，所有线程都只能看到一个单一的操作执行顺序。即在顺序一致性模型中，每个操作必须是<strong>原子性的，且立刻对所有线程可见</strong>。</p></li></ul><p>为了理解这两个特性，我们举个例子，假设有两个线程A和B并发执行，线程A有3个操作，他们在程序中的顺序是A1-&gt;A2-&gt;A3，线程B也有3个操作，B1-&gt;B2-&gt;B3。</p><p>假设<strong>正确使用了同步</strong>，A线程的3个操作执行后释放锁，B线程获取同一个锁。那么在<strong>顺序一致性模型</strong>中的执行效果如下所示：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/jmm-9ce5973e-6100-41e6-96b8-29ddb738e7f8.png" alt="正确同步图"></p><p>操作的执行整体上有序，并且两个线程都只能看到这个执行顺序。</p><p>假设<strong>没有使用同步</strong>，那么在<strong>顺序一致性模型</strong>中的执行效果如下所示：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/jmm-6357c025-a6e0-4c89-939d-040e549fac12.png" alt="没有正确同步图"></p><p>操作的执行整体上无序，但是两个线程都只能看到这个执行顺序。之所以可以得到这个保证，是因为顺序一致性模型中的<strong>每个操作必须立即对任意线程可见</strong>。</p><p><strong>但是JMM没有这样的保证。</strong></p><p>比如，在当前线程把写过的数据缓存在本地内存中，在没有刷新到主内存之前，这个写操作仅对当前线程可见；从其他线程的角度来观察，这个写操作根本没有被当前线程所执行。只有当前线程把本地内存中写过的数据刷新到主内存之后，这个写操作才对其他线程可见。在这种情况下，当前线程和其他线程看到的执行顺序是不一样的。</p><h3 id="jmm中同步程序的顺序一致性效果" tabindex="-1"><a class="header-anchor" href="#jmm中同步程序的顺序一致性效果" aria-hidden="true">#</a> JMM中同步程序的顺序一致性效果</h3><p>在顺序一致性模型中，所有操作完全按照程序的顺序串行执行。但是JMM中，临界区内（同步块或同步方法中）的代码可以发生重排序（但不允许临界区内的代码“逃逸”到临界区之外，因为会破坏锁的内存语义）。</p><p>虽然线程A在临界区做了重排序，但是因为锁的特性，线程B无法观察到线程A在临界区的重排序。这种重排序既提高了执行效率，又没有改变程序的执行结果。</p><p>同时，JMM会在退出临界区和进入临界区做特殊的处理，使得在临界区内程序获得与顺序一致性模型相同的内存视图。</p><p><strong>由此可见，JMM的具体实现方针是：在不改变（正确同步的）程序执行结果的前提下，尽量为编译期和处理器的优化打开方便之门</strong>。</p><h3 id="jmm中未同步程序的顺序一致性效果" tabindex="-1"><a class="header-anchor" href="#jmm中未同步程序的顺序一致性效果" aria-hidden="true">#</a> JMM中未同步程序的顺序一致性效果</h3><p>对于未同步的多线程程序，JMM只提供<strong>最小安全性</strong>：线程读取到的值，要么是之前某个线程写入的值，要么是默认值，不会无中生有。</p><p>为了实现这个安全性，JVM在堆上分配对象时，首先会对内存空间清零，然后才会在上面分配对象（这两个操作是同步的）。</p><p><strong>JMM没有保证未同步程序的执行结果与该程序在顺序一致性中执行结果一致。因为如果要保证执行结果一致，那么JMM需要禁止大量的优化，对程序的执行性能会产生很大的影响。</strong></p><p>未同步程序在JMM和顺序一致性内存模型中的执行特性有如下差异：</p><ol><li>顺序一致性保证单线程内的操作会按程序的顺序执行；JMM不保证单线程内的操作会按程序的顺序执行。（因为重排序，但是JMM保证单线程下的重排序不影响执行结果）</li><li>顺序一致性模型保证所有线程只能看到一致的操作执行顺序，而JMM不保证所有线程能看到一致的操作执行顺序。（因为JMM不保证所有操作立即可见）</li><li>顺序一致性模型保证对所有的内存读写操作都具有原子性，而JMM不保证对64位的long型和double型变量的写操作具有原子性。</li></ol><h2 id="happens-before" tabindex="-1"><a class="header-anchor" href="#happens-before" aria-hidden="true">#</a> happens-before</h2><h3 id="什么是happens-before" tabindex="-1"><a class="header-anchor" href="#什么是happens-before" aria-hidden="true">#</a> 什么是happens-before?</h3><p>一方面，程序员需要JMM提供一个强的内存模型来编写代码；另一方面，编译器和处理器希望JMM对它们的束缚越少越好，这样它们就可以最可能多的做优化来提高性能，希望的是一个弱的内存模型。</p><p>JMM考虑了这两种需求，并且找到了平衡点，对编译器和处理器来说，<strong>只要不改变程序的执行结果（单线程程序和正确同步了的多线程程序），编译器和处理器怎么优化都行。</strong></p><p>而对于程序员，JMM提供了<strong>happens-before规则</strong>（JSR-133规范），满足了程序员的需求——**简单易懂，并且提供了足够强的内存可见性保证。**换言之，程序员只要遵循happens-before规则，那他写的程序就能保证在JMM中具有强的内存可见性。</p><p>JMM使用happens-before的概念来定制两个操作之间的执行顺序。这两个操作可以在一个线程以内，也可以是不同的线程之间。因此，JMM可以通过happens-before关系向程序员提供跨线程的内存可见性保证。</p><p>happens-before关系的定义如下：</p><ol><li>如果一个操作happens-before另一个操作，那么第一个操作的执行结果将对第二个操作可见，而且第一个操作的执行顺序排在第二个操作之前。</li><li><strong>两个操作之间存在happens-before关系，并不意味着Java平台的具体实现必须要按照happens-before关系指定的顺序来执行。如果重排序之后的执行结果，与按happens-before关系来执行的结果一致，那么JMM也允许这样的重排序。</strong></li></ol><p>happens-before关系本质上和as-if-serial语义是一回事。</p><p>as-if-serial语义保证单线程内重排序后的执行结果和程序代码本身应有的结果是一致的，happens-before关系保证正确同步的多线程程序的执行结果不被重排序改变。</p><p>总之，<strong>如果操作A happens-before操作B，那么操作A在内存上所做的操作对操作B都是可见的，不管它们在不在一个线程。</strong></p><h3 id="天然的happens-before关系" tabindex="-1"><a class="header-anchor" href="#天然的happens-before关系" aria-hidden="true">#</a> 天然的happens-before关系</h3><p>在Java中，有以下天然的happens-before关系：</p><ul><li>程序顺序规则：一个线程中的每一个操作，happens-before于该线程中的任意后续操作。</li><li>监视器锁规则：对一个锁的解锁，happens-before于随后对这个锁的加锁。</li><li>volatile变量规则：对一个volatile域的写，happens-before于任意后续对这个volatile域的读。</li><li>传递性：如果A happens-before B，且B happens-before C，那么A happens-before C。</li><li>start规则：如果线程A执行操作ThreadB.start()启动线程B，那么A线程的ThreadB.start（）操作happens-before于线程B中的任意操作、</li><li>join规则：如果线程A执行操作ThreadB.join（）并成功返回，那么线程B中的任意操作happens-before于线程A从ThreadB.join()操作成功返回。</li></ul><p>举例：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">int</span> a <span class="token operator">=</span> <span class="token number">1</span><span class="token punctuation">;</span> <span class="token comment">// A操作</span>
 <span class="token keyword">int</span> b <span class="token operator">=</span> <span class="token number">2</span><span class="token punctuation">;</span> <span class="token comment">// B操作</span>
@@ -52,6 +52,6 @@ d <span class="token operator">=</span> e <span class="token operator">-</span>
 2&gt; B happens-before C 
 3&gt; A happens-before C
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>注意，真正在执行指令的时候，其实JVM有可能对操作A &amp; B进行重排序，因为无论先执行A还是B，他们都对对方是可见的，并且不影响执行结果。</p><p>如果这里发生了重排序，这在视觉上违背了happens-before原则，但是JMM是允许这样的重排序的。</p><p>所以，我们只关心happens-before规则，不用关心JVM到底是怎样执行的。只要确定操作A happens-before操作B就行了。</p><p>重排序有两类，JMM对这两类重排序有不同的策略：</p><ul><li>会改变程序执行结果的重排序，比如 A -&gt; C，JMM要求编译器和处理器都禁止这种重排序。</li><li>不会改变程序执行结果的重排序，比如 A -&gt; B，JMM对编译器和处理器不做要求，允许这种重排序。</li></ul><hr><blockquote><p>编辑：沉默王二，内容大部分来源以下三个开源仓库：</p><ul><li><a href="http://concurrent.redspider.group/" target="_blank" rel="noopener noreferrer">深入浅出 Java 多线程<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://github.com/CL0610/Java-concurrency" target="_blank" rel="noopener noreferrer">并发编程知识总结<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://github.com/CoderLeixiaoshuai/java-eight-part" target="_blank" rel="noopener noreferrer">Java八股文<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul></blockquote><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png"></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/thread/jmm.md" rel="noopener noreferrer" 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diff --git a/dist/thread/lock.html b/dist/thread/lock.html
index ca4974a8..e1f29552 100644
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clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">2.11 并发编程</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/thread/wangzhe-thread.html" class="nav-link sidebar-link sidebar-page" aria-label="创建Java线程的3种方式"><!---->创建Java线程的3种方式<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/thread-state-and-method.html" class="nav-link sidebar-link sidebar-page" aria-label="线程的6种状态及切换"><!---->线程的6种状态及切换<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a 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href="/thread/synchronized.html" class="nav-link sidebar-link sidebar-page" aria-label="synchronized"><!---->synchronized<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/cas.html" class="nav-link sidebar-link sidebar-page" aria-label="CAS的原理"><!---->CAS的原理<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/aqs.html" class="nav-link sidebar-link sidebar-page" aria-label="AQS详解"><!---->AQS详解<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/thread/lock.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="锁"><!---->锁<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/lock.html#synchronized的不足之处" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="synchronized的不足之处"><!---->synchronized的不足之处<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/lock.html#锁的几种分类" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="锁的几种分类"><!---->锁的几种分类<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/lock.html#可重入锁和非可重入锁" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="可重入锁和非可重入锁"><!---->可重入锁和非可重入锁<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/lock.html#公平锁与非公平锁" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="公平锁与非公平锁"><!---->公平锁与非公平锁<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/lock.html#读写锁和排它锁" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="读写锁和排它锁"><!---->读写锁和排它锁<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/lock.html#jdk中有关锁的一些接口和类" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="JDK中有关锁的一些接口和类"><!---->JDK中有关锁的一些接口和类<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/lock.html#抽象类aqs-aqls-aos" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="抽象类AQS/AQLS/AOS"><!---->抽象类AQS/AQLS/AOS<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/lock.html#接口condition-lock-readwritelock" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="接口Condition/Lock/ReadWriteLock"><!---->接口Condition/Lock/ReadWriteLock<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/lock.html#reentrantlock" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="ReentrantLock"><!---->ReentrantLock<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/lock.html#reentrantreadwritelock" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="ReentrantReadWriteLock"><!---->ReentrantReadWriteLock<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/lock.html#stampedlock" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="StampedLock"><!---->StampedLock<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li></ul><!--]--></li><li><!--[--><a href="/thread/reentrantLock.html" class="nav-link sidebar-link sidebar-page" aria-label="重入锁ReentrantLock"><!---->重入锁ReentrantLock<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ReentrantReadWriteLock.html" class="nav-link sidebar-link sidebar-page" aria-label="读写锁ReentrantReadWriteLock"><!---->读写锁ReentrantReadWriteLock<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/condition.html" class="nav-link sidebar-link sidebar-page" aria-label="线程协作类Condition"><!---->线程协作类Condition<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/LockSupport.html" class="nav-link sidebar-link sidebar-page" aria-label="线程阻塞唤醒类LockSupport"><!---->线程阻塞唤醒类LockSupport<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/map.html" class="nav-link sidebar-link sidebar-page" aria-label="并发集合容器"><!---->并发集合容器<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ConcurrentHashMap.html" class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentHashMap"><!---->ConcurrentHashMap<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ConcurrentLinkedQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentLinkedQueue"><!---->ConcurrentLinkedQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CopyOnWriteArrayList.html" class="nav-link sidebar-link sidebar-page" aria-label="CopyOnWriteArrayList"><!---->CopyOnWriteArrayList<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ThreadLocal.html" class="nav-link sidebar-link sidebar-page" aria-label="ThreadLocal"><!---->ThreadLocal<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/BlockingQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="BlockingQueue"><!---->BlockingQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/pool.html" class="nav-link sidebar-link sidebar-page" aria-label="线程池"><!---->线程池<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ScheduledThreadPoolExecutor.html" class="nav-link sidebar-link sidebar-page" aria-label="计划任务"><!---->计划任务<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/atomic.html" class="nav-link sidebar-link sidebar-page" aria-label="原子操作类"><!---->原子操作类<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CountDownLatch.html" class="nav-link sidebar-link sidebar-page" aria-label="通信工具类CountDownLatch"><!---->通信工具类CountDownLatch<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/fork-join.html" class="nav-link sidebar-link sidebar-page" aria-label="Fork/Join框架"><!---->Fork/Join框架<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/shengchanzhe-xiaofeizhe.html" class="nav-link sidebar-link sidebar-page" aria-label="生产者-消费者模式"><!---->生产者-消费者模式<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span 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class="breadcrumb disable"></nav><div class="page-title"><h1><!---->大致了解下Java的锁接口和锁</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon 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aria-current="page" href="/thread/lock.html#可重入锁和非可重入锁" class="router-link-active router-link-exact-active toc-link level3">可重入锁和非可重入锁</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/lock.html#公平锁与非公平锁" class="router-link-active router-link-exact-active toc-link level3">公平锁与非公平锁</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/lock.html#读写锁和排它锁" class="router-link-active router-link-exact-active toc-link level3">读写锁和排它锁</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/lock.html#jdk中有关锁的一些接口和类" class="router-link-active router-link-exact-active toc-link level2">JDK中有关锁的一些接口和类</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/lock.html#抽象类aqs-aqls-aos" class="router-link-active router-link-exact-active toc-link level3">抽象类AQS/AQLS/AOS</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/lock.html#接口condition-lock-readwritelock" class="router-link-active router-link-exact-active toc-link level3">接口Condition/Lock/ReadWriteLock</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/lock.html#reentrantlock" class="router-link-active router-link-exact-active toc-link level3">ReentrantLock</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/lock.html#reentrantreadwritelock" class="router-link-active router-link-exact-active toc-link level3">ReentrantReadWriteLock</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/lock.html#stampedlock" class="router-link-active router-link-exact-active toc-link level3">StampedLock</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="大致了解下java的锁接口和锁" tabindex="-1"><a class="header-anchor" href="#大致了解下java的锁接口和锁" aria-hidden="true">#</a> 大致了解下Java的锁接口和锁</h1><p>前面我们介绍了Java原生的锁——基于对象的锁，它一般是配合synchronized关键字来使用的。实际上，Java在<code>java.util.concurrent.locks</code>包下，还为我们提供了几个关于锁的类和接口。它们有更强大的功能或更高的性能。</p><h2 id="synchronized的不足之处" tabindex="-1"><a class="header-anchor" href="#synchronized的不足之处" aria-hidden="true">#</a> synchronized的不足之处</h2><p>我们先来看看<code>synchronized</code>有什么不足之处。</p><ul><li>如果临界区是只读操作，其实可以多线程一起执行，但使用synchronized的话，<strong>同一时间只能有一个线程执行</strong>。</li><li>synchronized无法知道线程有没有成功获取到锁</li><li>使用synchronized，如果临界区因为IO或者sleep方法等原因阻塞了，而当前线程又没有释放锁，就会导致<strong>所有线程等待</strong>。</li></ul><p>而这些都是locks包下的锁可以解决的。</p><h2 id="锁的几种分类" tabindex="-1"><a class="header-anchor" href="#锁的几种分类" aria-hidden="true">#</a> 锁的几种分类</h2><p>锁可以根据以下几种方式来进行分类，下面我们逐一介绍。</p><h3 id="可重入锁和非可重入锁" tabindex="-1"><a class="header-anchor" href="#可重入锁和非可重入锁" aria-hidden="true">#</a> 可重入锁和非可重入锁</h3><p>所谓重入锁，顾名思义。就是支持重新进入的锁，也就是说这个锁支持一个<strong>线程对资源重复加锁</strong>。</p><p>synchronized关键字就是使用的重入锁。比如说，你在一个synchronized实例方法里面调用另一个本实例的synchronized实例方法，它可以重新进入这个锁，不会出现任何异常。</p><p>如果我们自己在继承AQS实现同步器的时候，没有考虑到占有锁的线程再次获取锁的场景，可能就会导致线程阻塞，那这个就是一个“非可重入锁”。</p><p><code>ReentrantLock</code>的中文意思就是可重入锁。也是本文后续要介绍的重点类。</p><h3 id="公平锁与非公平锁" tabindex="-1"><a class="header-anchor" href="#公平锁与非公平锁" aria-hidden="true">#</a> 公平锁与非公平锁</h3><p>这里的“公平”，其实通俗意义来说就是“先来后到”，也就是FIFO。如果对一个锁来说，先对锁获取请求的线程一定会先被满足，后对锁获取请求的线程后被满足，那这个锁就是公平的。反之，那就是不公平的。</p><p>一般情况下，<strong>非公平锁能提升一定的效率。但是非公平锁可能会发生线程饥饿（有一些线程长时间得不到锁）的情况</strong>。所以要根据实际的需求来选择非公平锁和公平锁。</p><p>ReentrantLock支持非公平锁和公平锁两种。</p><h3 id="读写锁和排它锁" tabindex="-1"><a class="header-anchor" href="#读写锁和排它锁" aria-hidden="true">#</a> 读写锁和排它锁</h3><p>我们前面讲到的synchronized用的锁和ReentrantLock，其实都是“排它锁”。也就是说，这些锁在同一时刻只允许一个线程进行访问。</p><p>而读写锁可以在同一时刻允许多个读线程访问。Java提供了ReentrantReadWriteLock类作为读写锁的默认实现，内部维护了两个锁：一个读锁，一个写锁。通过分离读锁和写锁，使得在“读多写少”的环境下，大大地提高了性能。</p><blockquote><p>注意，即使用读写锁，在写线程访问时，所有的读线程和其它写线程均被阻塞。</p></blockquote><p><strong>可见，只是synchronized是远远不能满足多样化的业务对锁的要求的</strong>。接下来我们介绍一下JDK中有关锁的一些接口和类。</p><h2 id="jdk中有关锁的一些接口和类" tabindex="-1"><a class="header-anchor" href="#jdk中有关锁的一些接口和类" aria-hidden="true">#</a> JDK中有关锁的一些接口和类</h2><p>众所周知，JDK中关于并发的类大多都在<code>java.util.concurrent</code>（以下简称juc）包下。而juc.locks包看名字就知道，是提供了一些并发锁的工具类的。前面我们介绍的AQS（AbstractQueuedSynchronizer）就是在这个包下。下面分别介绍一下这个包下的类和接口以及它们之间的关系。</p><h3 id="抽象类aqs-aqls-aos" tabindex="-1"><a class="header-anchor" href="#抽象类aqs-aqls-aos" aria-hidden="true">#</a> 抽象类AQS/AQLS/AOS</h3><p>这三个抽象类有一定的关系，所以这里放到一起讲。</p><p>首先我们看<strong>AQS</strong>（AbstractQueuedSynchronizer），之前专门有章节介绍这个类，它是在JDK 1.5 发布的，提供了一个“队列同步器”的基本功能实现。而AQS里面的“资源”是用一个<code>int</code>类型的数据来表示的，有时候我们的业务需求资源的数量超出了<code>int</code>的范围，所以在JDK 1.6 中，多了一个<strong>AQLS</strong>（AbstractQueuedLongSynchronizer）。它的代码跟AQS几乎一样，只是把资源的类型变成了<code>long</code>类型。</p><p>AQS和AQLS都继承了一个类叫<strong>AOS</strong>（AbstractOwnableSynchronizer）。这个类也是在JDK 1.6 中出现的。这个类只有几行简单的代码。从源码类上的注释可以知道，它是用于表示锁与持有者之间的关系（独占模式）。可以看一下它的主要方法：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token comment">// 独占模式，锁的持有者  </span>
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clickable"><!----><span class="title">2.1 Java概述</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.2 Java基础语法</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.3 面向对象编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.4 字符串&amp;数组</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.5 集合框架（容器）</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.6 IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section 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class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/aqs.html" class="nav-link sidebar-link sidebar-page" aria-label="AQS详解"><!---->AQS详解<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/thread/lock.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="锁"><!---->锁<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/lock.html#synchronized的不足之处" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="synchronized的不足之处"><!---->synchronized的不足之处<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/lock.html#锁的几种分类" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="锁的几种分类"><!---->锁的几种分类<!----></a><ul class="sidebar-sub-headers"><li 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aria-label="JDK中有关锁的一些接口和类"><!---->JDK中有关锁的一些接口和类<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/lock.html#抽象类aqs-aqls-aos" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="抽象类AQS/AQLS/AOS"><!---->抽象类AQS/AQLS/AOS<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/lock.html#接口condition-lock-readwritelock" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="接口Condition/Lock/ReadWriteLock"><!---->接口Condition/Lock/ReadWriteLock<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/lock.html#reentrantlock" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="ReentrantLock"><!---->ReentrantLock<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/lock.html#reentrantreadwritelock" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="ReentrantReadWriteLock"><!---->ReentrantReadWriteLock<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/lock.html#stampedlock" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="StampedLock"><!---->StampedLock<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li></ul><!--]--></li><li><!--[--><a href="/thread/reentrantLock.html" class="nav-link sidebar-link sidebar-page" aria-label="重入锁ReentrantLock"><!---->重入锁ReentrantLock<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ReentrantReadWriteLock.html" class="nav-link sidebar-link sidebar-page" aria-label="读写锁ReentrantReadWriteLock"><!---->读写锁ReentrantReadWriteLock<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/condition.html" class="nav-link sidebar-link sidebar-page" aria-label="线程协作类Condition"><!---->线程协作类Condition<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/LockSupport.html" class="nav-link sidebar-link sidebar-page" aria-label="线程阻塞唤醒类LockSupport"><!---->线程阻塞唤醒类LockSupport<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/map.html" class="nav-link sidebar-link sidebar-page" aria-label="并发集合容器"><!---->并发集合容器<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ConcurrentHashMap.html" class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentHashMap"><!---->ConcurrentHashMap<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ConcurrentLinkedQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentLinkedQueue"><!---->ConcurrentLinkedQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CopyOnWriteArrayList.html" class="nav-link sidebar-link sidebar-page" aria-label="CopyOnWriteArrayList"><!---->CopyOnWriteArrayList<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ThreadLocal.html" class="nav-link sidebar-link sidebar-page" aria-label="ThreadLocal"><!---->ThreadLocal<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/BlockingQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="BlockingQueue"><!---->BlockingQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/pool.html" class="nav-link sidebar-link sidebar-page" aria-label="线程池"><!---->线程池<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ScheduledThreadPoolExecutor.html" class="nav-link sidebar-link sidebar-page" aria-label="计划任务"><!---->计划任务<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/atomic.html" class="nav-link sidebar-link sidebar-page" aria-label="原子操作类"><!---->原子操作类<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CountDownLatch.html" class="nav-link sidebar-link sidebar-page" aria-label="通信工具类CountDownLatch"><!---->通信工具类CountDownLatch<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/fork-join.html" class="nav-link sidebar-link sidebar-page" aria-label="Fork/Join框架"><!---->Fork/Join框架<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/shengchanzhe-xiaofeizhe.html" class="nav-link sidebar-link sidebar-page" aria-label="生产者-消费者模式"><!---->生产者-消费者模式<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->大致了解下Java的锁接口和锁</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月23日</span><meta property="datePublished" content="2022-03-23T12:08:58.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 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12 分钟</span><meta property="timeRequired" content="PT12M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/lock.html#synchronized的不足之处" class="router-link-active router-link-exact-active toc-link level2">synchronized的不足之处</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/lock.html#锁的几种分类" class="router-link-active router-link-exact-active toc-link level2">锁的几种分类</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/lock.html#可重入锁和非可重入锁" class="router-link-active router-link-exact-active toc-link level3">可重入锁和非可重入锁</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/lock.html#公平锁与非公平锁" class="router-link-active router-link-exact-active toc-link level3">公平锁与非公平锁</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/lock.html#读写锁和排它锁" class="router-link-active router-link-exact-active toc-link level3">读写锁和排它锁</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/lock.html#jdk中有关锁的一些接口和类" class="router-link-active router-link-exact-active toc-link level2">JDK中有关锁的一些接口和类</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/lock.html#抽象类aqs-aqls-aos" class="router-link-active router-link-exact-active toc-link level3">抽象类AQS/AQLS/AOS</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/lock.html#接口condition-lock-readwritelock" class="router-link-active router-link-exact-active toc-link level3">接口Condition/Lock/ReadWriteLock</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/lock.html#reentrantlock" class="router-link-active router-link-exact-active toc-link level3">ReentrantLock</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/lock.html#reentrantreadwritelock" class="router-link-active router-link-exact-active toc-link level3">ReentrantReadWriteLock</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/lock.html#stampedlock" class="router-link-active router-link-exact-active toc-link level3">StampedLock</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="大致了解下java的锁接口和锁" tabindex="-1"><a class="header-anchor" href="#大致了解下java的锁接口和锁" aria-hidden="true">#</a> 大致了解下Java的锁接口和锁</h1><p>前面我们介绍了Java原生的锁——基于对象的锁，它一般是配合synchronized关键字来使用的。实际上，Java在<code>java.util.concurrent.locks</code>包下，还为我们提供了几个关于锁的类和接口。它们有更强大的功能或更高的性能。</p><h2 id="synchronized的不足之处" tabindex="-1"><a class="header-anchor" href="#synchronized的不足之处" aria-hidden="true">#</a> synchronized的不足之处</h2><p>我们先来看看<code>synchronized</code>有什么不足之处。</p><ul><li>如果临界区是只读操作，其实可以多线程一起执行，但使用synchronized的话，<strong>同一时间只能有一个线程执行</strong>。</li><li>synchronized无法知道线程有没有成功获取到锁</li><li>使用synchronized，如果临界区因为IO或者sleep方法等原因阻塞了，而当前线程又没有释放锁，就会导致<strong>所有线程等待</strong>。</li></ul><p>而这些都是locks包下的锁可以解决的。</p><h2 id="锁的几种分类" tabindex="-1"><a class="header-anchor" href="#锁的几种分类" aria-hidden="true">#</a> 锁的几种分类</h2><p>锁可以根据以下几种方式来进行分类，下面我们逐一介绍。</p><h3 id="可重入锁和非可重入锁" tabindex="-1"><a class="header-anchor" href="#可重入锁和非可重入锁" aria-hidden="true">#</a> 可重入锁和非可重入锁</h3><p>所谓重入锁，顾名思义。就是支持重新进入的锁，也就是说这个锁支持一个<strong>线程对资源重复加锁</strong>。</p><p>synchronized关键字就是使用的重入锁。比如说，你在一个synchronized实例方法里面调用另一个本实例的synchronized实例方法，它可以重新进入这个锁，不会出现任何异常。</p><p>如果我们自己在继承AQS实现同步器的时候，没有考虑到占有锁的线程再次获取锁的场景，可能就会导致线程阻塞，那这个就是一个“非可重入锁”。</p><p><code>ReentrantLock</code>的中文意思就是可重入锁。也是本文后续要介绍的重点类。</p><h3 id="公平锁与非公平锁" tabindex="-1"><a class="header-anchor" href="#公平锁与非公平锁" aria-hidden="true">#</a> 公平锁与非公平锁</h3><p>这里的“公平”，其实通俗意义来说就是“先来后到”，也就是FIFO。如果对一个锁来说，先对锁获取请求的线程一定会先被满足，后对锁获取请求的线程后被满足，那这个锁就是公平的。反之，那就是不公平的。</p><p>一般情况下，<strong>非公平锁能提升一定的效率。但是非公平锁可能会发生线程饥饿（有一些线程长时间得不到锁）的情况</strong>。所以要根据实际的需求来选择非公平锁和公平锁。</p><p>ReentrantLock支持非公平锁和公平锁两种。</p><h3 id="读写锁和排它锁" tabindex="-1"><a class="header-anchor" href="#读写锁和排它锁" aria-hidden="true">#</a> 读写锁和排它锁</h3><p>我们前面讲到的synchronized用的锁和ReentrantLock，其实都是“排它锁”。也就是说，这些锁在同一时刻只允许一个线程进行访问。</p><p>而读写锁可以在同一时刻允许多个读线程访问。Java提供了ReentrantReadWriteLock类作为读写锁的默认实现，内部维护了两个锁：一个读锁，一个写锁。通过分离读锁和写锁，使得在“读多写少”的环境下，大大地提高了性能。</p><blockquote><p>注意，即使用读写锁，在写线程访问时，所有的读线程和其它写线程均被阻塞。</p></blockquote><p><strong>可见，只是synchronized是远远不能满足多样化的业务对锁的要求的</strong>。接下来我们介绍一下JDK中有关锁的一些接口和类。</p><h2 id="jdk中有关锁的一些接口和类" tabindex="-1"><a class="header-anchor" href="#jdk中有关锁的一些接口和类" aria-hidden="true">#</a> JDK中有关锁的一些接口和类</h2><p>众所周知，JDK中关于并发的类大多都在<code>java.util.concurrent</code>（以下简称juc）包下。而juc.locks包看名字就知道，是提供了一些并发锁的工具类的。前面我们介绍的AQS（AbstractQueuedSynchronizer）就是在这个包下。下面分别介绍一下这个包下的类和接口以及它们之间的关系。</p><h3 id="抽象类aqs-aqls-aos" tabindex="-1"><a class="header-anchor" href="#抽象类aqs-aqls-aos" aria-hidden="true">#</a> 抽象类AQS/AQLS/AOS</h3><p>这三个抽象类有一定的关系，所以这里放到一起讲。</p><p>首先我们看<strong>AQS</strong>（AbstractQueuedSynchronizer），之前专门有章节介绍这个类，它是在JDK 1.5 发布的，提供了一个“队列同步器”的基本功能实现。而AQS里面的“资源”是用一个<code>int</code>类型的数据来表示的，有时候我们的业务需求资源的数量超出了<code>int</code>的范围，所以在JDK 1.6 中，多了一个<strong>AQLS</strong>（AbstractQueuedLongSynchronizer）。它的代码跟AQS几乎一样，只是把资源的类型变成了<code>long</code>类型。</p><p>AQS和AQLS都继承了一个类叫<strong>AOS</strong>（AbstractOwnableSynchronizer）。这个类也是在JDK 1.6 中出现的。这个类只有几行简单的代码。从源码类上的注释可以知道，它是用于表示锁与持有者之间的关系（独占模式）。可以看一下它的主要方法：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token comment">// 独占模式，锁的持有者  </span>
 <span class="token keyword">private</span> <span class="token keyword">transient</span> <span class="token class-name">Thread</span> exclusiveOwnerThread<span class="token punctuation">;</span>  
 
 <span class="token comment">// 设置锁持有者  </span>
@@ -169,6 +169,6 @@
 <span class="token comment">// 读锁溢出时用来存储多出的读锁</span>
 <span class="token keyword">private</span> <span class="token keyword">transient</span> <span class="token keyword">int</span> readerOverflow<span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>StampedLock用这个long类型的变量的前7位（LG_READERS）来表示读锁，每获取一个悲观读锁，就加1（RUNIT），每释放一个悲观读锁，就减1。而悲观读锁最多只能装128个（7位限制），很容易溢出，所以用一个int类型的变量来存储溢出的悲观读锁。</p><p>写锁用state变量剩下的位来表示，每次获取一个写锁，就加0000 1000 0000（WBIT）。需要注意的是，<strong>写锁在释放的时候，并不是减WBIT，而是再加WBIT</strong>。这是为了<strong>让每次写锁都留下痕迹</strong>，解决CAS中的ABA问题，也为<strong>乐观锁检查变化</strong>validate方法提供基础。</p><p>乐观读锁就比较简单了，并没有真正改变state的值，而是在获取锁的时候记录state的写状态，在操作完成后去检查state的写状态部分是否发生变化，上文提到了，每次写锁都会留下痕迹，也是为了这里乐观锁检查变化提供方便。</p><p>总的来说，StampedLock的性能是非常优异的，基本上可以取代ReentrantReadWriteLock的作用。</p><hr><blockquote><p>编辑：沉默王二，内容大部分来源以下三个开源仓库：</p><ul><li><a href="http://concurrent.redspider.group/" target="_blank" rel="noopener noreferrer">深入浅出 Java 多线程<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span 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class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="ConcurrentNavigableMap接口与ConcurrentSkipListMap类"><!---->ConcurrentNavigableMap接口与ConcurrentSkipListMap类<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/map.html#并发queue" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="并发Queue"><!---->并发Queue<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/map.html#并发set" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="并发Set"><!---->并发Set<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/map.html#阻塞队列" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="阻塞队列"><!---->阻塞队列<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/map.html#阻塞队列的由来" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="阻塞队列的由来"><!---->阻塞队列的由来<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/map.html#blockingqueue的操作方法" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="BlockingQueue的操作方法"><!---->BlockingQueue的操作方法<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/map.html#blockingqueue的实现类" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="BlockingQueue的实现类"><!---->BlockingQueue的实现类<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/map.html#阻塞队列的原理" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="阻塞队列的原理"><!---->阻塞队列的原理<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/map.html#示例和使用场景" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="示例和使用场景"><!---->示例和使用场景<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/map.html#copyonwrite容器" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="CopyOnWrite容器"><!---->CopyOnWrite容器<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/map.html#什么是copyonwrite容器" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="什么是CopyOnWrite容器"><!---->什么是CopyOnWrite容器<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/map.html#copyonwritearraylist" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="CopyOnWriteArrayList"><!---->CopyOnWriteArrayList<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/map.html#copyonwrite的业务中实现" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="CopyOnWrite的业务中实现"><!---->CopyOnWrite的业务中实现<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li></ul><!--]--></li><li><!--[--><a href="/thread/ConcurrentHashMap.html" class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentHashMap"><!---->ConcurrentHashMap<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ConcurrentLinkedQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentLinkedQueue"><!---->ConcurrentLinkedQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CopyOnWriteArrayList.html" class="nav-link sidebar-link sidebar-page" aria-label="CopyOnWriteArrayList"><!---->CopyOnWriteArrayList<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ThreadLocal.html" class="nav-link sidebar-link sidebar-page" aria-label="ThreadLocal"><!---->ThreadLocal<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/BlockingQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="BlockingQueue"><!---->BlockingQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/pool.html" class="nav-link sidebar-link sidebar-page" aria-label="线程池"><!---->线程池<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ScheduledThreadPoolExecutor.html" class="nav-link sidebar-link sidebar-page" aria-label="计划任务"><!---->计划任务<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/atomic.html" class="nav-link sidebar-link sidebar-page" aria-label="原子操作类"><!---->原子操作类<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CountDownLatch.html" class="nav-link sidebar-link sidebar-page" aria-label="通信工具类CountDownLatch"><!---->通信工具类CountDownLatch<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/fork-join.html" class="nav-link sidebar-link sidebar-page" aria-label="Fork/Join框架"><!---->Fork/Join框架<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/shengchanzhe-xiaofeizhe.html" class="nav-link sidebar-link sidebar-page" aria-label="生产者-消费者模式"><!---->生产者-消费者模式<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->简单聊聊Java的并发集合容器</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 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content="PT21M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/map.html#同步容器与并发容器" class="router-link-active router-link-exact-active toc-link level2">同步容器与并发容器</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/map.html#并发容器类介绍" class="router-link-active router-link-exact-active toc-link level2">并发容器类介绍</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/map.html#并发map" class="router-link-active router-link-exact-active toc-link level2">并发Map</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/map.html#concurrentmap接口" class="router-link-active router-link-exact-active toc-link level3">ConcurrentMap接口</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/map.html#concurrentnavigablemap接口与concurrentskiplistmap类" class="router-link-active router-link-exact-active toc-link level3">ConcurrentNavigableMap接口与ConcurrentSkipListMap类</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/map.html#并发queue" class="router-link-active router-link-exact-active toc-link level2">并发Queue</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/map.html#并发set" class="router-link-active router-link-exact-active toc-link level2">并发Set</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/map.html#阻塞队列" class="router-link-active router-link-exact-active toc-link level2">阻塞队列</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/map.html#阻塞队列的由来" class="router-link-active router-link-exact-active toc-link level3">阻塞队列的由来</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/map.html#blockingqueue的操作方法" class="router-link-active router-link-exact-active toc-link level3">BlockingQueue的操作方法</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/map.html#blockingqueue的实现类" class="router-link-active router-link-exact-active toc-link level3">BlockingQueue的实现类</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/map.html#阻塞队列的原理" class="router-link-active router-link-exact-active toc-link level3">阻塞队列的原理</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/map.html#示例和使用场景" class="router-link-active router-link-exact-active toc-link level3">示例和使用场景</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/map.html#copyonwrite容器" class="router-link-active router-link-exact-active toc-link level2">CopyOnWrite容器</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/map.html#什么是copyonwrite容器" class="router-link-active router-link-exact-active toc-link level3">什么是CopyOnWrite容器</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/map.html#copyonwritearraylist" class="router-link-active router-link-exact-active toc-link level3">CopyOnWriteArrayList</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/map.html#copyonwrite的业务中实现" class="router-link-active router-link-exact-active toc-link level3">CopyOnWrite的业务中实现</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="简单聊聊java的并发集合容器" tabindex="-1"><a class="header-anchor" href="#简单聊聊java的并发集合容器" aria-hidden="true">#</a> 简单聊聊Java的并发集合容器</h1><h2 id="同步容器与并发容器" tabindex="-1"><a class="header-anchor" href="#同步容器与并发容器" aria-hidden="true">#</a> 同步容器与并发容器</h2><p>我们知道在java.util包下提供了一些容器类，而Vector和Hashtable是线程安全的容器类，但是这些容器实现同步的方式是通过对方法加锁(sychronized)方式实现的，这样读写均需要锁操作，导致性能低下。</p><p>而即使是Vector这样线程安全的类，在面对多线程下的复合操作的时候也是需要通过客户端加锁的方式保证原子性。如下面例子说明:</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">TestVector</span> <span class="token punctuation">{</span>
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class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->简单聊聊Java的并发集合容器</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 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392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 21 分钟</span><meta property="timeRequired" content="PT21M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/map.html#同步容器与并发容器" class="router-link-active router-link-exact-active toc-link level2">同步容器与并发容器</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/map.html#并发容器类介绍" class="router-link-active router-link-exact-active toc-link level2">并发容器类介绍</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/map.html#并发map" class="router-link-active router-link-exact-active toc-link level2">并发Map</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/map.html#concurrentmap接口" class="router-link-active router-link-exact-active toc-link level3">ConcurrentMap接口</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/map.html#concurrentnavigablemap接口与concurrentskiplistmap类" class="router-link-active router-link-exact-active toc-link level3">ConcurrentNavigableMap接口与ConcurrentSkipListMap类</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/map.html#并发queue" class="router-link-active router-link-exact-active toc-link level2">并发Queue</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/map.html#并发set" class="router-link-active router-link-exact-active toc-link level2">并发Set</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/map.html#阻塞队列" class="router-link-active router-link-exact-active toc-link level2">阻塞队列</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/map.html#阻塞队列的由来" class="router-link-active router-link-exact-active toc-link level3">阻塞队列的由来</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/map.html#blockingqueue的操作方法" class="router-link-active router-link-exact-active toc-link level3">BlockingQueue的操作方法</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/map.html#blockingqueue的实现类" class="router-link-active router-link-exact-active toc-link level3">BlockingQueue的实现类</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/map.html#阻塞队列的原理" class="router-link-active router-link-exact-active toc-link level3">阻塞队列的原理</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/map.html#示例和使用场景" class="router-link-active router-link-exact-active toc-link level3">示例和使用场景</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/map.html#copyonwrite容器" class="router-link-active router-link-exact-active toc-link level2">CopyOnWrite容器</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/map.html#什么是copyonwrite容器" class="router-link-active router-link-exact-active toc-link level3">什么是CopyOnWrite容器</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/map.html#copyonwritearraylist" class="router-link-active router-link-exact-active toc-link level3">CopyOnWriteArrayList</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/map.html#copyonwrite的业务中实现" class="router-link-active router-link-exact-active toc-link level3">CopyOnWrite的业务中实现</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="简单聊聊java的并发集合容器" tabindex="-1"><a class="header-anchor" href="#简单聊聊java的并发集合容器" aria-hidden="true">#</a> 简单聊聊Java的并发集合容器</h1><h2 id="同步容器与并发容器" tabindex="-1"><a class="header-anchor" href="#同步容器与并发容器" aria-hidden="true">#</a> 同步容器与并发容器</h2><p>我们知道在java.util包下提供了一些容器类，而Vector和Hashtable是线程安全的容器类，但是这些容器实现同步的方式是通过对方法加锁(sychronized)方式实现的，这样读写均需要锁操作，导致性能低下。</p><p>而即使是Vector这样线程安全的类，在面对多线程下的复合操作的时候也是需要通过客户端加锁的方式保证原子性。如下面例子说明:</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">TestVector</span> <span class="token punctuation">{</span>
 	<span class="token keyword">private</span> <span class="token class-name">Vector</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">String</span><span class="token punctuation">&gt;</span></span> vector<span class="token punctuation">;</span>
 
 	<span class="token comment">//方法一</span>
@@ -364,6 +364,6 @@ DelayQueue是一个没有大小限制的队列，因此往队列中插入数据
 
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>这里需要各位小伙伴特别特别注意一个问题，此处的场景是每晚凌晨“黑名单”定时更新，原因是CopyOnWrite容器有<strong>数据一致性</strong>的问题，它只能保证<strong>最终数据一致性</strong>。</p><p>所以如果我们希望写入的数据马上能准确地读取，请不要使用CopyOnWrite容器。</p><hr><blockquote><p>编辑：沉默王二，内容大部分来源以下三个开源仓库：</p><ul><li><a href="http://concurrent.redspider.group/" target="_blank" rel="noopener noreferrer">深入浅出 Java 多线程<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://github.com/CL0610/Java-concurrency" target="_blank" rel="noopener 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class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/pool.html#newcachedthreadpool" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="newCachedThreadPool"><!---->newCachedThreadPool<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/pool.html#newfixedthreadpool" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="newFixedThreadPool"><!---->newFixedThreadPool<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/pool.html#newsinglethreadexecutor" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="newSingleThreadExecutor"><!---->newSingleThreadExecutor<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/pool.html#newscheduledthreadpool" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="newScheduledThreadPool"><!---->newScheduledThreadPool<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li></ul><!--]--></li><li><!--[--><a href="/thread/ScheduledThreadPoolExecutor.html" class="nav-link sidebar-link sidebar-page" aria-label="计划任务"><!---->计划任务<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/atomic.html" class="nav-link sidebar-link sidebar-page" aria-label="原子操作类"><!---->原子操作类<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CountDownLatch.html" class="nav-link sidebar-link sidebar-page" aria-label="通信工具类CountDownLatch"><!---->通信工具类CountDownLatch<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/fork-join.html" class="nav-link sidebar-link sidebar-page" 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aria-current="page" href="/thread/pool.html#线程池的原理" class="router-link-active router-link-exact-active toc-link level2">线程池的原理</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/pool.html#threadpoolexecutor提供的构造方法" class="router-link-active router-link-exact-active toc-link level3">ThreadPoolExecutor提供的构造方法</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/pool.html#threadpoolexecutor的策略" class="router-link-active router-link-exact-active toc-link level3">ThreadPoolExecutor的策略</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/pool.html#线程池主要的任务处理流程" class="router-link-active router-link-exact-active toc-link level3">线程池主要的任务处理流程</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/pool.html#threadpoolexecutor如何做到线程复用的" class="router-link-active router-link-exact-active toc-link level3">ThreadPoolExecutor如何做到线程复用的？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/pool.html#四种常见的线程池" class="router-link-active router-link-exact-active toc-link level2">四种常见的线程池</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/pool.html#newcachedthreadpool" class="router-link-active router-link-exact-active toc-link level3">newCachedThreadPool</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/pool.html#newfixedthreadpool" class="router-link-active router-link-exact-active toc-link level3">newFixedThreadPool</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/pool.html#newsinglethreadexecutor" class="router-link-active router-link-exact-active toc-link level3">newSingleThreadExecutor</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/pool.html#newscheduledthreadpool" class="router-link-active router-link-exact-active toc-link level3">newScheduledThreadPool</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h2 id="为什么要使用线程池" tabindex="-1"><a class="header-anchor" href="#为什么要使用线程池" aria-hidden="true">#</a> 为什么要使用线程池</h2><p>使用线程池主要有以下三个原因：</p><ol><li>创建/销毁线程需要消耗系统资源，线程池可以<strong>复用已创建的线程</strong>。</li><li><strong>控制并发的数量</strong>。并发数量过多，可能会导致资源消耗过多，从而造成服务器崩溃。（主要原因）</li><li><strong>可以对线程做统一管理</strong>。</li></ol><h2 id="线程池的原理" tabindex="-1"><a class="header-anchor" href="#线程池的原理" aria-hidden="true">#</a> 线程池的原理</h2><p>Java中的线程池顶层接口是<code>Executor</code>接口，<code>ThreadPoolExecutor</code>是这个接口的实现类。</p><p>我们先看看<code>ThreadPoolExecutor</code>类。</p><h3 id="threadpoolexecutor提供的构造方法" tabindex="-1"><a class="header-anchor" href="#threadpoolexecutor提供的构造方法" aria-hidden="true">#</a> ThreadPoolExecutor提供的构造方法</h3><p>一共有四个构造方法：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token comment">// 五个参数的构造函数</span>
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clickable"><!----><span class="title">2.1 Java概述</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.2 Java基础语法</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.3 面向对象编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.4 字符串&amp;数组</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.5 集合框架（容器）</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.6 IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">2.11 并发编程</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/thread/wangzhe-thread.html" class="nav-link sidebar-link sidebar-page" aria-label="创建Java线程的3种方式"><!---->创建Java线程的3种方式<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/thread-state-and-method.html" class="nav-link sidebar-link sidebar-page" aria-label="线程的6种状态及切换"><!---->线程的6种状态及切换<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/thread-group-and-thread-priority.html" class="nav-link sidebar-link sidebar-page" aria-label="线程组和线程优先级"><!---->线程组和线程优先级<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/why-need-thread.html" class="nav-link sidebar-link sidebar-page" aria-label="进程与线程的区别"><!---->进程与线程的区别<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/thread-bring-some-problem.html" class="nav-link sidebar-link sidebar-page" aria-label="并发编程带来了哪些问题"><!---->并发编程带来了哪些问题<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/jmm.html" class="nav-link sidebar-link sidebar-page" aria-label="Java内存模型"><!---->Java内存模型<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/volatile.html" class="nav-link sidebar-link sidebar-page" aria-label="volatile"><!---->volatile<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/synchronized.html" class="nav-link sidebar-link sidebar-page" aria-label="synchronized"><!---->synchronized<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/cas.html" class="nav-link sidebar-link sidebar-page" aria-label="CAS的原理"><!---->CAS的原理<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/aqs.html" class="nav-link sidebar-link sidebar-page" aria-label="AQS详解"><!---->AQS详解<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/lock.html" class="nav-link sidebar-link sidebar-page" aria-label="锁"><!---->锁<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/reentrantLock.html" class="nav-link sidebar-link sidebar-page" aria-label="重入锁ReentrantLock"><!---->重入锁ReentrantLock<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ReentrantReadWriteLock.html" class="nav-link sidebar-link sidebar-page" aria-label="读写锁ReentrantReadWriteLock"><!---->读写锁ReentrantReadWriteLock<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/condition.html" class="nav-link sidebar-link sidebar-page" aria-label="线程协作类Condition"><!---->线程协作类Condition<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/LockSupport.html" class="nav-link sidebar-link sidebar-page" aria-label="线程阻塞唤醒类LockSupport"><!---->线程阻塞唤醒类LockSupport<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/map.html" class="nav-link sidebar-link sidebar-page" aria-label="并发集合容器"><!---->并发集合容器<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ConcurrentHashMap.html" class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentHashMap"><!---->ConcurrentHashMap<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ConcurrentLinkedQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentLinkedQueue"><!---->ConcurrentLinkedQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CopyOnWriteArrayList.html" class="nav-link sidebar-link sidebar-page" aria-label="CopyOnWriteArrayList"><!---->CopyOnWriteArrayList<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ThreadLocal.html" class="nav-link sidebar-link sidebar-page" aria-label="ThreadLocal"><!---->ThreadLocal<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/BlockingQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="BlockingQueue"><!---->BlockingQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/thread/pool.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="线程池"><!---->线程池<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/pool.html#为什么要使用线程池" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="为什么要使用线程池"><!---->为什么要使用线程池<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/pool.html#线程池的原理" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="线程池的原理"><!---->线程池的原理<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/pool.html#threadpoolexecutor提供的构造方法" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="ThreadPoolExecutor提供的构造方法"><!---->ThreadPoolExecutor提供的构造方法<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/pool.html#threadpoolexecutor的策略" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="ThreadPoolExecutor的策略"><!---->ThreadPoolExecutor的策略<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/pool.html#线程池主要的任务处理流程" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="线程池主要的任务处理流程"><!---->线程池主要的任务处理流程<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/pool.html#threadpoolexecutor如何做到线程复用的" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="ThreadPoolExecutor如何做到线程复用的？"><!---->ThreadPoolExecutor如何做到线程复用的？<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/pool.html#四种常见的线程池" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="四种常见的线程池"><!---->四种常见的线程池<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/pool.html#newcachedthreadpool" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="newCachedThreadPool"><!---->newCachedThreadPool<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/pool.html#newfixedthreadpool" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="newFixedThreadPool"><!---->newFixedThreadPool<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/pool.html#newsinglethreadexecutor" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="newSingleThreadExecutor"><!---->newSingleThreadExecutor<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/pool.html#newscheduledthreadpool" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="newScheduledThreadPool"><!---->newScheduledThreadPool<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li></ul><!--]--></li><li><!--[--><a href="/thread/ScheduledThreadPoolExecutor.html" class="nav-link sidebar-link sidebar-page" aria-label="计划任务"><!---->计划任务<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/atomic.html" class="nav-link sidebar-link sidebar-page" aria-label="原子操作类"><!---->原子操作类<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CountDownLatch.html" class="nav-link sidebar-link sidebar-page" aria-label="通信工具类CountDownLatch"><!---->通信工具类CountDownLatch<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/fork-join.html" class="nav-link sidebar-link sidebar-page" aria-label="Fork/Join框架"><!---->Fork/Join框架<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/shengchanzhe-xiaofeizhe.html" class="nav-link sidebar-link sidebar-page" aria-label="生产者-消费者模式"><!---->生产者-消费者模式<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->面试必备：Java线程池解析</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 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href="/thread/pool.html#threadpoolexecutor的策略" class="router-link-active router-link-exact-active toc-link level3">ThreadPoolExecutor的策略</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/pool.html#线程池主要的任务处理流程" class="router-link-active router-link-exact-active toc-link level3">线程池主要的任务处理流程</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/pool.html#threadpoolexecutor如何做到线程复用的" class="router-link-active router-link-exact-active toc-link level3">ThreadPoolExecutor如何做到线程复用的？</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/pool.html#四种常见的线程池" class="router-link-active router-link-exact-active toc-link level2">四种常见的线程池</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/pool.html#newcachedthreadpool" class="router-link-active router-link-exact-active toc-link level3">newCachedThreadPool</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/pool.html#newfixedthreadpool" class="router-link-active router-link-exact-active toc-link level3">newFixedThreadPool</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/pool.html#newsinglethreadexecutor" class="router-link-active router-link-exact-active toc-link level3">newSingleThreadExecutor</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/pool.html#newscheduledthreadpool" class="router-link-active router-link-exact-active toc-link level3">newScheduledThreadPool</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h2 id="为什么要使用线程池" tabindex="-1"><a class="header-anchor" href="#为什么要使用线程池" aria-hidden="true">#</a> 为什么要使用线程池</h2><p>使用线程池主要有以下三个原因：</p><ol><li>创建/销毁线程需要消耗系统资源，线程池可以<strong>复用已创建的线程</strong>。</li><li><strong>控制并发的数量</strong>。并发数量过多，可能会导致资源消耗过多，从而造成服务器崩溃。（主要原因）</li><li><strong>可以对线程做统一管理</strong>。</li></ol><h2 id="线程池的原理" tabindex="-1"><a class="header-anchor" href="#线程池的原理" aria-hidden="true">#</a> 线程池的原理</h2><p>Java中的线程池顶层接口是<code>Executor</code>接口，<code>ThreadPoolExecutor</code>是这个接口的实现类。</p><p>我们先看看<code>ThreadPoolExecutor</code>类。</p><h3 id="threadpoolexecutor提供的构造方法" tabindex="-1"><a class="header-anchor" href="#threadpoolexecutor提供的构造方法" aria-hidden="true">#</a> ThreadPoolExecutor提供的构造方法</h3><p>一共有四个构造方法：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token comment">// 五个参数的构造函数</span>
 <span class="token keyword">public</span> <span class="token class-name">ThreadPoolExecutor</span><span class="token punctuation">(</span><span class="token keyword">int</span> corePoolSize<span class="token punctuation">,</span>
                           <span class="token keyword">int</span> maximumPoolSize<span class="token punctuation">,</span>
                           <span class="token keyword">long</span> keepAliveTime<span class="token punctuation">,</span>
@@ -337,6 +337,6 @@
           <span class="token keyword">new</span> <span class="token class-name">DelayedWorkQueue</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>四种常见的线程池基本够我们使用了，但是《阿里巴巴开发手册》不建议我们直接使用Executors类中的线程池，而是通过<code>ThreadPoolExecutor</code>的方式，这样的处理方式让写的同学需要更加明确线程池的运行规则，规避资源耗尽的风险。</p><p>但如果你及团队本身对线程池非常熟悉，又确定业务规模不会大到资源耗尽的程度（比如线程数量或任务队列长度可能达到Integer.MAX_VALUE）时，其实是可以使用JDK提供的这几个接口的，它能让我们的代码具有更强的可读性。</p><hr><blockquote><p>编辑：沉默王二，内容大部分来源以下三个开源仓库：</p><ul><li><a href="http://concurrent.redspider.group/" target="_blank" rel="noopener noreferrer">深入浅出 Java 多线程<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" 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window</span></span></a></li><li><a href="https://github.com/CoderLeixiaoshuai/java-eight-part" target="_blank" rel="noopener noreferrer">Java八股文<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul></blockquote><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png"></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/thread/pool.md" rel="noopener noreferrer" 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clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">2.11 并发编程</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/thread/wangzhe-thread.html" class="nav-link sidebar-link sidebar-page" aria-label="创建Java线程的3种方式"><!---->创建Java线程的3种方式<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/thread-state-and-method.html" class="nav-link sidebar-link sidebar-page" aria-label="线程的6种状态及切换"><!---->线程的6种状态及切换<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a 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href="/thread/synchronized.html" class="nav-link sidebar-link sidebar-page" aria-label="synchronized"><!---->synchronized<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/cas.html" class="nav-link sidebar-link sidebar-page" aria-label="CAS的原理"><!---->CAS的原理<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/aqs.html" class="nav-link sidebar-link sidebar-page" aria-label="AQS详解"><!---->AQS详解<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/lock.html" class="nav-link sidebar-link sidebar-page" aria-label="锁"><!---->锁<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/thread/reentrantLock.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="重入锁ReentrantLock"><!---->重入锁ReentrantLock<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ReentrantReadWriteLock.html" class="nav-link sidebar-link sidebar-page" aria-label="读写锁ReentrantReadWriteLock"><!---->读写锁ReentrantReadWriteLock<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/condition.html" class="nav-link sidebar-link sidebar-page" aria-label="线程协作类Condition"><!---->线程协作类Condition<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/LockSupport.html" class="nav-link sidebar-link sidebar-page" aria-label="线程阻塞唤醒类LockSupport"><!---->线程阻塞唤醒类LockSupport<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/map.html" class="nav-link sidebar-link sidebar-page" aria-label="并发集合容器"><!---->并发集合容器<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ConcurrentHashMap.html" class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentHashMap"><!---->ConcurrentHashMap<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ConcurrentLinkedQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentLinkedQueue"><!---->ConcurrentLinkedQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CopyOnWriteArrayList.html" class="nav-link sidebar-link sidebar-page" aria-label="CopyOnWriteArrayList"><!---->CopyOnWriteArrayList<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ThreadLocal.html" class="nav-link sidebar-link sidebar-page" aria-label="ThreadLocal"><!---->ThreadLocal<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/BlockingQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="BlockingQueue"><!---->BlockingQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/pool.html" class="nav-link sidebar-link sidebar-page" aria-label="线程池"><!---->线程池<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ScheduledThreadPoolExecutor.html" class="nav-link sidebar-link sidebar-page" aria-label="计划任务"><!---->计划任务<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/atomic.html" class="nav-link sidebar-link sidebar-page" aria-label="原子操作类"><!---->原子操作类<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CountDownLatch.html" class="nav-link sidebar-link sidebar-page" aria-label="通信工具类CountDownLatch"><!---->通信工具类CountDownLatch<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/fork-join.html" class="nav-link sidebar-link sidebar-page" aria-label="Fork/Join框架"><!---->Fork/Join框架<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/shengchanzhe-xiaofeizhe.html" class="nav-link sidebar-link sidebar-page" aria-label="生产者-消费者模式"><!---->生产者-消费者模式<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->深入理解Java并发重入锁ReentrantLock</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 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15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 4 分钟</span><meta property="timeRequired" content="PT4M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="深入理解java并发重入锁reentrantlock" tabindex="-1"><a class="header-anchor" href="#深入理解java并发重入锁reentrantlock" aria-hidden="true">#</a> 深入理解Java并发重入锁ReentrantLock</h1><p>ReentrantLock重入锁，是实现Lock接口的一个类，也是在实际编程中使用频率很高的一个锁，<strong>支持重入性，表示能够对共享资源能够重复加锁，即当前线程获取该锁再次获取不会被阻塞</strong>。</p><p>要想支持重入性，就要解决两个问题：</p><ol><li><p>在线程获取锁的时候，如果已经获取锁的线程是当前线程的话则直接再次获取成功；</p></li><li><p>由于锁会被获取n次，那么只有锁在被释放同样的n次之后，该锁才算是完全释放成功。</p></li></ol><p>我们知道，同步组件主要是通过重写AQS的几个protected方法来表达自己的同步语义。针对第一个问题，我们来看看ReentrantLock是怎样实现的，以非公平锁为例，判断当前线程能否获得锁为例，核心方法为nonfairTryAcquire：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">final</span> <span class="token keyword">boolean</span> <span class="token function">nonfairTryAcquire</span><span class="token punctuation">(</span><span class="token keyword">int</span> acquires<span class="token punctuation">)</span> <span class="token punctuation">{</span>
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class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->深入理解Java并发重入锁ReentrantLock</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月23日</span><meta property="datePublished" content="2022-03-23T12:08:58.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 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tabindex="-1"><a class="header-anchor" href="#深入理解java并发重入锁reentrantlock" aria-hidden="true">#</a> 深入理解Java并发重入锁ReentrantLock</h1><p>ReentrantLock重入锁，是实现Lock接口的一个类，也是在实际编程中使用频率很高的一个锁，<strong>支持重入性，表示能够对共享资源能够重复加锁，即当前线程获取该锁再次获取不会被阻塞</strong>。</p><p>要想支持重入性，就要解决两个问题：</p><ol><li><p>在线程获取锁的时候，如果已经获取锁的线程是当前线程的话则直接再次获取成功；</p></li><li><p>由于锁会被获取n次，那么只有锁在被释放同样的n次之后，该锁才算是完全释放成功。</p></li></ol><p>我们知道，同步组件主要是通过重写AQS的几个protected方法来表达自己的同步语义。针对第一个问题，我们来看看ReentrantLock是怎样实现的，以非公平锁为例，判断当前线程能否获得锁为例，核心方法为nonfairTryAcquire：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">final</span> <span class="token keyword">boolean</span> <span class="token function">nonfairTryAcquire</span><span class="token punctuation">(</span><span class="token keyword">int</span> acquires<span class="token punctuation">)</span> <span class="token punctuation">{</span>
     <span class="token keyword">final</span> <span class="token class-name">Thread</span> current <span class="token operator">=</span> <span class="token class-name">Thread</span><span class="token punctuation">.</span><span class="token function">currentThread</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
     <span class="token keyword">int</span> c <span class="token operator">=</span> <span class="token function">getState</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
     <span class="token comment">//1. 如果该锁未被任何线程占有，该锁能被当前线程获取</span>
@@ -104,6 +104,6 @@
     <span class="token keyword">return</span> <span class="token boolean">false</span><span class="token punctuation">;</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>这段代码的逻辑与nonfairTryAcquire基本上一直，唯一的不同在于增加了hasQueuedPredecessors的逻辑判断，方法名就可知道该方法用来判断当前节点在同步队列中是否有前驱节点的判断，如果有前驱节点说明有线程比当前线程更早的请求资源，根据公平性，当前线程请求资源失败。如果当前节点没有前驱节点的话，再才有做后面的逻辑判断的必要性。</p><p><strong>公平锁每次都是从同步队列中的第一个节点获取到锁，而非公平性锁则不一定，有可能刚释放锁的线程能再次获取到锁</strong>。</p><hr><blockquote><p>编辑：沉默王二，内容大部分来源以下三个开源仓库：</p><ul><li><a href="http://concurrent.redspider.group/" target="_blank" rel="noopener noreferrer">深入浅出 Java 多线程<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://github.com/CL0610/Java-concurrency" target="_blank" rel="noopener noreferrer">并发编程知识总结<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" 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window</span></span></a></li></ul></blockquote><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png"></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/thread/reentrantLock.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 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+++ b/dist/thread/shengchanzhe-xiaofeizhe.html
@@ -39,10 +39,10 @@
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aria-label="一、前言"><!---->一、前言<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">二、Java核心</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.1 Java概述</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.2 Java基础语法</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.3 面向对象编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.4 字符串&amp;数组</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.5 集合框架（容器）</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.6 IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">2.11 并发编程</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/thread/wangzhe-thread.html" class="nav-link sidebar-link sidebar-page" aria-label="创建Java线程的3种方式"><!---->创建Java线程的3种方式<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/thread-state-and-method.html" class="nav-link sidebar-link sidebar-page" aria-label="线程的6种状态及切换"><!---->线程的6种状态及切换<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/thread-group-and-thread-priority.html" class="nav-link sidebar-link sidebar-page" aria-label="线程组和线程优先级"><!---->线程组和线程优先级<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/why-need-thread.html" class="nav-link sidebar-link sidebar-page" aria-label="进程与线程的区别"><!---->进程与线程的区别<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/thread-bring-some-problem.html" class="nav-link sidebar-link sidebar-page" aria-label="并发编程带来了哪些问题"><!---->并发编程带来了哪些问题<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/jmm.html" class="nav-link sidebar-link sidebar-page" aria-label="Java内存模型"><!---->Java内存模型<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/volatile.html" class="nav-link sidebar-link sidebar-page" aria-label="volatile"><!---->volatile<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/synchronized.html" class="nav-link sidebar-link sidebar-page" aria-label="synchronized"><!---->synchronized<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/cas.html" class="nav-link sidebar-link sidebar-page" aria-label="CAS的原理"><!---->CAS的原理<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/aqs.html" class="nav-link sidebar-link sidebar-page" aria-label="AQS详解"><!---->AQS详解<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/lock.html" class="nav-link sidebar-link sidebar-page" aria-label="锁"><!---->锁<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/reentrantLock.html" class="nav-link sidebar-link sidebar-page" aria-label="重入锁ReentrantLock"><!---->重入锁ReentrantLock<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ReentrantReadWriteLock.html" class="nav-link sidebar-link sidebar-page" aria-label="读写锁ReentrantReadWriteLock"><!---->读写锁ReentrantReadWriteLock<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/condition.html" class="nav-link sidebar-link sidebar-page" aria-label="线程协作类Condition"><!---->线程协作类Condition<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/LockSupport.html" class="nav-link sidebar-link sidebar-page" aria-label="线程阻塞唤醒类LockSupport"><!---->线程阻塞唤醒类LockSupport<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/map.html" class="nav-link sidebar-link sidebar-page" aria-label="并发集合容器"><!---->并发集合容器<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ConcurrentHashMap.html" class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentHashMap"><!---->ConcurrentHashMap<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ConcurrentLinkedQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentLinkedQueue"><!---->ConcurrentLinkedQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CopyOnWriteArrayList.html" class="nav-link sidebar-link sidebar-page" aria-label="CopyOnWriteArrayList"><!---->CopyOnWriteArrayList<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ThreadLocal.html" class="nav-link sidebar-link sidebar-page" aria-label="ThreadLocal"><!---->ThreadLocal<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/BlockingQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="BlockingQueue"><!---->BlockingQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/pool.html" class="nav-link sidebar-link sidebar-page" aria-label="线程池"><!---->线程池<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ScheduledThreadPoolExecutor.html" class="nav-link sidebar-link sidebar-page" aria-label="计划任务"><!---->计划任务<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/atomic.html" class="nav-link sidebar-link sidebar-page" aria-label="原子操作类"><!---->原子操作类<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CountDownLatch.html" class="nav-link sidebar-link sidebar-page" aria-label="通信工具类CountDownLatch"><!---->通信工具类CountDownLatch<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/fork-join.html" class="nav-link sidebar-link sidebar-page" aria-label="Fork/Join框架"><!---->Fork/Join框架<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/thread/shengchanzhe-xiaofeizhe.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="生产者-消费者模式"><!---->生产者-消费者模式<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/shengchanzhe-xiaofeizhe.html#wait-notify的消息通知机制" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="wait/notify的消息通知机制"><!---->wait/notify的消息通知机制<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/shengchanzhe-xiaofeizhe.html#预备知识" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="预备知识"><!---->预备知识<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/shengchanzhe-xiaofeizhe.html#wait-notify消息通知潜在的一些问题" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="wait/notify消息通知潜在的一些问题"><!---->wait/notify消息通知潜在的一些问题<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/shengchanzhe-xiaofeizhe.html#wait-notifyall实现生产者-消费者" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="wait/notifyAll实现生产者-消费者"><!---->wait/notifyAll实现生产者-消费者<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/shengchanzhe-xiaofeizhe.html#使用lock中condition的await-signalall实现生产者-消费者" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="使用Lock中Condition的await/signalAll实现生产者-消费者"><!---->使用Lock中Condition的await/signalAll实现生产者-消费者<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/shengchanzhe-xiaofeizhe.html#针对wait方法" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="针对wait方法"><!---->针对wait方法<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/shengchanzhe-xiaofeizhe.html#针对notify方法" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="针对notify方法"><!---->针对notify方法<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/shengchanzhe-xiaofeizhe.html#使用blockingqueue实现生产者-消费者" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="使用BlockingQueue实现生产者-消费者"><!---->使用BlockingQueue实现生产者-消费者<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow 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href="/thread/shengchanzhe-xiaofeizhe.html#wait-notify的消息通知机制" class="router-link-active router-link-exact-active toc-link level2">wait/notify的消息通知机制</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/shengchanzhe-xiaofeizhe.html#预备知识" class="router-link-active router-link-exact-active toc-link level3">预备知识</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/shengchanzhe-xiaofeizhe.html#wait-notify消息通知潜在的一些问题" class="router-link-active router-link-exact-active toc-link level3">wait/notify消息通知潜在的一些问题</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/shengchanzhe-xiaofeizhe.html#wait-notifyall实现生产者-消费者" class="router-link-active router-link-exact-active toc-link level3">wait/notifyAll实现生产者-消费者</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/shengchanzhe-xiaofeizhe.html#使用lock中condition的await-signalall实现生产者-消费者" class="router-link-active router-link-exact-active toc-link level2">使用Lock中Condition的await/signalAll实现生产者-消费者</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/shengchanzhe-xiaofeizhe.html#针对wait方法" class="router-link-active router-link-exact-active toc-link level3">针对wait方法</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/shengchanzhe-xiaofeizhe.html#针对notify方法" class="router-link-active router-link-exact-active toc-link level3">针对notify方法</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/shengchanzhe-xiaofeizhe.html#使用blockingqueue实现生产者-消费者" class="router-link-active router-link-exact-active toc-link level2">使用BlockingQueue实现生产者-消费者</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><p>生产者-消费者模式是一个十分经典的多线程并发协作的模式，弄懂生产者-消费者问题能够让我们对并发编程的理解加深。所谓生产者-消费者问题，实际上主要是包含了两类线程，一种是生产者线程用于生产数据，另一种是消费者线程用于消费数据，为了解耦生产者和消费者的关系，通常会采用共享的数据区域，就像是一个仓库，生产者生产数据之后直接放置在共享数据区中，并不需要关心消费者的行为；而消费者只需要从共享数据区中去获取数据，就不再需要关心生产者的行为。但是，这个共享数据区域中应该具备这样的线程间并发协作的功能：</p><ol><li>如果共享数据区已满的话，阻塞生产者继续生产数据放置入内；</li><li>如果共享数据区为空的话，阻塞消费者继续消费数据；</li></ol><p>在实现生产者消费者问题时，可以采用三种方式：</p><ol><li><p>使用Object的wait/notify的消息通知机制；</p></li><li><p>使用Lock的Condition的await/signal的消息通知机制；</p></li><li><p>使用BlockingQueue实现。本文主要将这三种实现方式进行总结归纳。</p></li></ol><h2 id="wait-notify的消息通知机制" tabindex="-1"><a class="header-anchor" href="#wait-notify的消息通知机制" aria-hidden="true">#</a> wait/notify的消息通知机制</h2><h3 id="预备知识" tabindex="-1"><a class="header-anchor" href="#预备知识" aria-hidden="true">#</a> 预备知识</h3><p>Java 中，可以通过配合调用 Object 对象的 wait() 方法和 notify()方法或 notifyAll() 方法来实现线程间的通信。在线程中调用 wait() 方法，将阻塞当前线程，直至等到其他线程调用了调用 notify() 方法或 notifyAll() 方法进行通知之后，当前线程才能从wait()方法出返回，继续执行下面的操作。</p><ol><li><p><strong>wait</strong></p><p>该方法用来将当前线程置入休眠状态，直到接到通知或被中断为止。在调用 wait()之前，线程必须要获得该对象的对象监视器锁，即只能在<strong>同步方法或同步块</strong>中调用 wait()方法。调用wait()方法之后，当前线程会释放锁。如果调用wait()方法时，线程并未获取到锁的话，则会<strong>抛出IllegalMonitorStateException</strong>异常，这是以个RuntimeException。如果再次获取到锁的话，当前线程才能从wait()方法处成功返回。</p></li><li><p><strong>notify</strong></p><p>该方法也要在同步方法或同步块中调用，即在调用前，线程也必须要获得该对象的对象级别锁，如果调用 notify()时没有持有适当的锁，也会抛出 <strong>IllegalMonitorStateException</strong>。 该方法任意从WAITTING状态的线程中挑选一个进行通知，使得调用wait()方法的线程从等待队列移入到同步队列中，等待有机会再一次获取到锁，从而使得调用wait()方法的线程能够从wait()方法处退出。调用notify后，当前线程不会马上释放该对象锁，要等到程序退出同步块后，当前线程才会释放锁。</p></li><li><p><strong>notifyAll</strong> 该方法与 notify ()方法的工作方式相同，重要的一点差异是： notifyAll 使所有原来在该对象上 wait 的线程统统退出WAITTING状态，使得他们全部从等待队列中移入到同步队列中去，等待下一次能够有机会获取到对象监视器锁。</p></li></ol><h3 id="wait-notify消息通知潜在的一些问题" tabindex="-1"><a class="header-anchor" href="#wait-notify消息通知潜在的一些问题" aria-hidden="true">#</a> wait/notify消息通知潜在的一些问题</h3><h4 id="_1-notify早期通知" tabindex="-1"><a class="header-anchor" href="#_1-notify早期通知" aria-hidden="true">#</a> <strong>1.notify早期通知</strong></h4><p>notify 通知的遗漏很容易理解，即 threadA 还没开始 wait 的时候，threadB 已经 notify 了，这样，threadB 通知是没有任何响应的，当 threadB 退出 synchronized 代码块后，threadA 再开始 wait，便会一直阻塞等待，直到被别的线程打断。比如在下面的示例代码中，就模拟出notify早期通知带来的问题：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">EarlyNotify</span> <span class="token punctuation">{</span>
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clickable"><!----><span class="title">2.1 Java概述</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.2 Java基础语法</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.3 面向对象编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.4 字符串&amp;数组</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.5 集合框架（容器）</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.6 IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section 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aria-label="CopyOnWriteArrayList"><!---->CopyOnWriteArrayList<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ThreadLocal.html" class="nav-link sidebar-link sidebar-page" aria-label="ThreadLocal"><!---->ThreadLocal<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/BlockingQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="BlockingQueue"><!---->BlockingQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/pool.html" class="nav-link sidebar-link sidebar-page" aria-label="线程池"><!---->线程池<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ScheduledThreadPoolExecutor.html" class="nav-link sidebar-link sidebar-page" aria-label="计划任务"><!---->计划任务<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/atomic.html" class="nav-link sidebar-link sidebar-page" aria-label="原子操作类"><!---->原子操作类<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CountDownLatch.html" class="nav-link sidebar-link sidebar-page" aria-label="通信工具类CountDownLatch"><!---->通信工具类CountDownLatch<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/fork-join.html" class="nav-link sidebar-link sidebar-page" aria-label="Fork/Join框架"><!---->Fork/Join框架<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/thread/shengchanzhe-xiaofeizhe.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="生产者-消费者模式"><!---->生产者-消费者模式<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/shengchanzhe-xiaofeizhe.html#wait-notify的消息通知机制" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="wait/notify的消息通知机制"><!---->wait/notify的消息通知机制<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/shengchanzhe-xiaofeizhe.html#预备知识" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="预备知识"><!---->预备知识<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/shengchanzhe-xiaofeizhe.html#wait-notify消息通知潜在的一些问题" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="wait/notify消息通知潜在的一些问题"><!---->wait/notify消息通知潜在的一些问题<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/shengchanzhe-xiaofeizhe.html#wait-notifyall实现生产者-消费者" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="wait/notifyAll实现生产者-消费者"><!---->wait/notifyAll实现生产者-消费者<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/shengchanzhe-xiaofeizhe.html#使用lock中condition的await-signalall实现生产者-消费者" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="使用Lock中Condition的await/signalAll实现生产者-消费者"><!---->使用Lock中Condition的await/signalAll实现生产者-消费者<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/shengchanzhe-xiaofeizhe.html#针对wait方法" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="针对wait方法"><!---->针对wait方法<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/shengchanzhe-xiaofeizhe.html#针对notify方法" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="针对notify方法"><!---->针对notify方法<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/shengchanzhe-xiaofeizhe.html#使用blockingqueue实现生产者-消费者" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="使用BlockingQueue实现生产者-消费者"><!---->使用BlockingQueue实现生产者-消费者<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->从根上理解生产者-消费者模式</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 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class="theme-hope-content"><p>生产者-消费者模式是一个十分经典的多线程并发协作的模式，弄懂生产者-消费者问题能够让我们对并发编程的理解加深。所谓生产者-消费者问题，实际上主要是包含了两类线程，一种是生产者线程用于生产数据，另一种是消费者线程用于消费数据，为了解耦生产者和消费者的关系，通常会采用共享的数据区域，就像是一个仓库，生产者生产数据之后直接放置在共享数据区中，并不需要关心消费者的行为；而消费者只需要从共享数据区中去获取数据，就不再需要关心生产者的行为。但是，这个共享数据区域中应该具备这样的线程间并发协作的功能：</p><ol><li>如果共享数据区已满的话，阻塞生产者继续生产数据放置入内；</li><li>如果共享数据区为空的话，阻塞消费者继续消费数据；</li></ol><p>在实现生产者消费者问题时，可以采用三种方式：</p><ol><li><p>使用Object的wait/notify的消息通知机制；</p></li><li><p>使用Lock的Condition的await/signal的消息通知机制；</p></li><li><p>使用BlockingQueue实现。本文主要将这三种实现方式进行总结归纳。</p></li></ol><h2 id="wait-notify的消息通知机制" tabindex="-1"><a class="header-anchor" href="#wait-notify的消息通知机制" aria-hidden="true">#</a> wait/notify的消息通知机制</h2><h3 id="预备知识" tabindex="-1"><a class="header-anchor" href="#预备知识" aria-hidden="true">#</a> 预备知识</h3><p>Java 中，可以通过配合调用 Object 对象的 wait() 方法和 notify()方法或 notifyAll() 方法来实现线程间的通信。在线程中调用 wait() 方法，将阻塞当前线程，直至等到其他线程调用了调用 notify() 方法或 notifyAll() 方法进行通知之后，当前线程才能从wait()方法出返回，继续执行下面的操作。</p><ol><li><p><strong>wait</strong></p><p>该方法用来将当前线程置入休眠状态，直到接到通知或被中断为止。在调用 wait()之前，线程必须要获得该对象的对象监视器锁，即只能在<strong>同步方法或同步块</strong>中调用 wait()方法。调用wait()方法之后，当前线程会释放锁。如果调用wait()方法时，线程并未获取到锁的话，则会<strong>抛出IllegalMonitorStateException</strong>异常，这是以个RuntimeException。如果再次获取到锁的话，当前线程才能从wait()方法处成功返回。</p></li><li><p><strong>notify</strong></p><p>该方法也要在同步方法或同步块中调用，即在调用前，线程也必须要获得该对象的对象级别锁，如果调用 notify()时没有持有适当的锁，也会抛出 <strong>IllegalMonitorStateException</strong>。 该方法任意从WAITTING状态的线程中挑选一个进行通知，使得调用wait()方法的线程从等待队列移入到同步队列中，等待有机会再一次获取到锁，从而使得调用wait()方法的线程能够从wait()方法处退出。调用notify后，当前线程不会马上释放该对象锁，要等到程序退出同步块后，当前线程才会释放锁。</p></li><li><p><strong>notifyAll</strong> 该方法与 notify ()方法的工作方式相同，重要的一点差异是： notifyAll 使所有原来在该对象上 wait 的线程统统退出WAITTING状态，使得他们全部从等待队列中移入到同步队列中去，等待下一次能够有机会获取到对象监视器锁。</p></li></ol><h3 id="wait-notify消息通知潜在的一些问题" tabindex="-1"><a class="header-anchor" href="#wait-notify消息通知潜在的一些问题" aria-hidden="true">#</a> wait/notify消息通知潜在的一些问题</h3><h4 id="_1-notify早期通知" tabindex="-1"><a class="header-anchor" href="#_1-notify早期通知" aria-hidden="true">#</a> <strong>1.notify早期通知</strong></h4><p>notify 通知的遗漏很容易理解，即 threadA 还没开始 wait 的时候，threadB 已经 notify 了，这样，threadB 通知是没有任何响应的，当 threadB 退出 synchronized 代码块后，threadA 再开始 wait，便会一直阻塞等待，直到被别的线程打断。比如在下面的示例代码中，就模拟出notify早期通知带来的问题：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">EarlyNotify</span> <span class="token punctuation">{</span>
 
     <span class="token keyword">private</span> <span class="token keyword">static</span> <span class="token class-name">String</span> lockObject <span class="token operator">=</span> <span class="token string">&quot;&quot;</span><span class="token punctuation">;</span>
 
@@ -632,6 +632,6 @@
 消费者pool<span class="token operator">-</span><span class="token number">1</span><span class="token operator">-</span>thread<span class="token operator">-</span><span class="token number">11</span>正在消费数据<span class="token operator">-</span><span class="token number">1622505717</span>
 生产者pool<span class="token operator">-</span><span class="token number">1</span><span class="token operator">-</span>thread<span class="token operator">-</span><span class="token number">5</span>生产数据<span class="token number">355412953</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>可以看出，使用BlockingQueue来实现生产者-消费者很简洁，这正是利用了BlockingQueue插入和获取数据附加阻塞操作的特性。</p><hr><blockquote><p>编辑：沉默王二，内容大部分来源以下三个开源仓库：</p><ul><li><a href="http://concurrent.redspider.group/" target="_blank" rel="noopener noreferrer">深入浅出 Java 多线程<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a 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aria-label="锁的升级流程"><!---->锁的升级流程<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/synchronized.html#各种锁的优缺点对比" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="各种锁的优缺点对比"><!---->各种锁的优缺点对比<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li></ul><!--]--></li><li><!--[--><a href="/thread/cas.html" class="nav-link sidebar-link sidebar-page" aria-label="CAS的原理"><!---->CAS的原理<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/aqs.html" class="nav-link sidebar-link sidebar-page" aria-label="AQS详解"><!---->AQS详解<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/lock.html" class="nav-link sidebar-link sidebar-page" aria-label="锁"><!---->锁<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/reentrantLock.html" class="nav-link sidebar-link sidebar-page" aria-label="重入锁ReentrantLock"><!---->重入锁ReentrantLock<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ReentrantReadWriteLock.html" class="nav-link sidebar-link sidebar-page" aria-label="读写锁ReentrantReadWriteLock"><!---->读写锁ReentrantReadWriteLock<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/condition.html" class="nav-link sidebar-link sidebar-page" aria-label="线程协作类Condition"><!---->线程协作类Condition<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/LockSupport.html" class="nav-link sidebar-link sidebar-page" aria-label="线程阻塞唤醒类LockSupport"><!---->线程阻塞唤醒类LockSupport<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/map.html" class="nav-link sidebar-link sidebar-page" aria-label="并发集合容器"><!---->并发集合容器<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ConcurrentHashMap.html" class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentHashMap"><!---->ConcurrentHashMap<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ConcurrentLinkedQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentLinkedQueue"><!---->ConcurrentLinkedQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CopyOnWriteArrayList.html" class="nav-link sidebar-link sidebar-page" aria-label="CopyOnWriteArrayList"><!---->CopyOnWriteArrayList<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ThreadLocal.html" class="nav-link sidebar-link sidebar-page" aria-label="ThreadLocal"><!---->ThreadLocal<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/BlockingQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="BlockingQueue"><!---->BlockingQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/pool.html" class="nav-link sidebar-link sidebar-page" aria-label="线程池"><!---->线程池<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ScheduledThreadPoolExecutor.html" class="nav-link sidebar-link sidebar-page" aria-label="计划任务"><!---->计划任务<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/atomic.html" class="nav-link sidebar-link sidebar-page" aria-label="原子操作类"><!---->原子操作类<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CountDownLatch.html" class="nav-link sidebar-link sidebar-page" aria-label="通信工具类CountDownLatch"><!---->通信工具类CountDownLatch<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/fork-join.html" class="nav-link sidebar-link sidebar-page" aria-label="Fork/Join框架"><!---->Fork/Join框架<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/shengchanzhe-xiaofeizhe.html" class="nav-link sidebar-link sidebar-page" aria-label="生产者-消费者模式"><!---->生产者-消费者模式<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow 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class="page-title"><h1><!---->Java中的synchronized关键字锁的到底是什么？</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 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88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 13 分钟</span><meta property="timeRequired" content="PT13M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/synchronized.html#synchronized关键字" class="router-link-active router-link-exact-active toc-link level2">Synchronized关键字</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/synchronized.html#几种锁" class="router-link-active router-link-exact-active toc-link level2">几种锁</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/synchronized.html#java对象头" class="router-link-active router-link-exact-active toc-link level3">Java对象头</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/synchronized.html#偏向锁" class="router-link-active router-link-exact-active toc-link level3">偏向锁</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/synchronized.html#轻量级锁" class="router-link-active router-link-exact-active toc-link level3">轻量级锁</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/synchronized.html#重量级锁" class="router-link-active router-link-exact-active toc-link level3">重量级锁</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/synchronized.html#锁的升级流程" class="router-link-active router-link-exact-active toc-link level3">锁的升级流程</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/synchronized.html#各种锁的优缺点对比" class="router-link-active router-link-exact-active toc-link level3">各种锁的优缺点对比</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="java中的synchronized关键字锁的到底是什么" tabindex="-1"><a class="header-anchor" href="#java中的synchronized关键字锁的到底是什么" aria-hidden="true">#</a> Java中的synchronized关键字锁的到底是什么？</h1><p>这篇文章我们来聊一聊Java多线程里面的“锁”。</p><p>首先需要明确的一点是：<strong>Java多线程的锁都是基于对象的</strong>，Java中的每一个对象都可以作为一个锁。</p><p>还有一点需要注意的是，我们常听到的<strong>类锁</strong>其实也是对象锁。</p><p>Java类只有一个Class对象（可以有多个实例对象，多个实例共享这个Class对象），而Class对象也是特殊的Java对象。所以我们常说的类锁，其实就是Class对象的锁。</p><h2 id="synchronized关键字" tabindex="-1"><a class="header-anchor" href="#synchronized关键字" aria-hidden="true">#</a> Synchronized关键字</h2><p>说到锁，我们通常会谈到<code>synchronized</code>这个关键字。它翻译成中文就是“同步”的意思。</p><p>我们通常使用<code>synchronized</code>关键字来给一段代码或一个方法上锁。它通常有以下三种形式：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token comment">// 关键字在实例方法上，锁为当前实例</span>
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class="sidebar-heading clickable"><!----><span class="title">2.6 IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">2.11 并发编程</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/thread/wangzhe-thread.html" class="nav-link sidebar-link sidebar-page" aria-label="创建Java线程的3种方式"><!---->创建Java线程的3种方式<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/thread-state-and-method.html" class="nav-link sidebar-link sidebar-page" aria-label="线程的6种状态及切换"><!---->线程的6种状态及切换<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/thread-group-and-thread-priority.html" class="nav-link sidebar-link sidebar-page" aria-label="线程组和线程优先级"><!---->线程组和线程优先级<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/why-need-thread.html" class="nav-link sidebar-link sidebar-page" aria-label="进程与线程的区别"><!---->进程与线程的区别<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/thread-bring-some-problem.html" class="nav-link sidebar-link sidebar-page" aria-label="并发编程带来了哪些问题"><!---->并发编程带来了哪些问题<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/jmm.html" class="nav-link sidebar-link sidebar-page" aria-label="Java内存模型"><!---->Java内存模型<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/volatile.html" class="nav-link sidebar-link sidebar-page" aria-label="volatile"><!---->volatile<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/thread/synchronized.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="synchronized"><!---->synchronized<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/synchronized.html#synchronized关键字" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="Synchronized关键字"><!---->Synchronized关键字<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/synchronized.html#几种锁" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="几种锁"><!---->几种锁<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/synchronized.html#java对象头" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="Java对象头"><!---->Java对象头<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/synchronized.html#偏向锁" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="偏向锁"><!---->偏向锁<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/synchronized.html#轻量级锁" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="轻量级锁"><!---->轻量级锁<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/synchronized.html#重量级锁" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="重量级锁"><!---->重量级锁<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/synchronized.html#锁的升级流程" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="锁的升级流程"><!---->锁的升级流程<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/synchronized.html#各种锁的优缺点对比" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="各种锁的优缺点对比"><!---->各种锁的优缺点对比<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li></ul><!--]--></li><li><!--[--><a href="/thread/cas.html" class="nav-link sidebar-link sidebar-page" aria-label="CAS的原理"><!---->CAS的原理<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/aqs.html" class="nav-link sidebar-link sidebar-page" aria-label="AQS详解"><!---->AQS详解<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/lock.html" class="nav-link sidebar-link sidebar-page" aria-label="锁"><!---->锁<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/reentrantLock.html" class="nav-link sidebar-link sidebar-page" aria-label="重入锁ReentrantLock"><!---->重入锁ReentrantLock<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ReentrantReadWriteLock.html" class="nav-link sidebar-link sidebar-page" aria-label="读写锁ReentrantReadWriteLock"><!---->读写锁ReentrantReadWriteLock<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/condition.html" class="nav-link sidebar-link sidebar-page" aria-label="线程协作类Condition"><!---->线程协作类Condition<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/LockSupport.html" class="nav-link sidebar-link sidebar-page" aria-label="线程阻塞唤醒类LockSupport"><!---->线程阻塞唤醒类LockSupport<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/map.html" class="nav-link sidebar-link sidebar-page" aria-label="并发集合容器"><!---->并发集合容器<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ConcurrentHashMap.html" class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentHashMap"><!---->ConcurrentHashMap<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ConcurrentLinkedQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentLinkedQueue"><!---->ConcurrentLinkedQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CopyOnWriteArrayList.html" class="nav-link sidebar-link sidebar-page" aria-label="CopyOnWriteArrayList"><!---->CopyOnWriteArrayList<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ThreadLocal.html" class="nav-link sidebar-link sidebar-page" aria-label="ThreadLocal"><!---->ThreadLocal<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/BlockingQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="BlockingQueue"><!---->BlockingQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/pool.html" class="nav-link sidebar-link sidebar-page" aria-label="线程池"><!---->线程池<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ScheduledThreadPoolExecutor.html" class="nav-link sidebar-link sidebar-page" aria-label="计划任务"><!---->计划任务<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/atomic.html" class="nav-link sidebar-link sidebar-page" aria-label="原子操作类"><!---->原子操作类<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CountDownLatch.html" class="nav-link sidebar-link sidebar-page" aria-label="通信工具类CountDownLatch"><!---->通信工具类CountDownLatch<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/fork-join.html" class="nav-link sidebar-link sidebar-page" aria-label="Fork/Join框架"><!---->Fork/Join框架<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/shengchanzhe-xiaofeizhe.html" class="nav-link sidebar-link sidebar-page" aria-label="生产者-消费者模式"><!---->生产者-消费者模式<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java中的synchronized关键字锁的到底是什么？</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 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pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 13 分钟</span><meta property="timeRequired" content="PT13M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/synchronized.html#synchronized关键字" class="router-link-active router-link-exact-active toc-link level2">Synchronized关键字</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/synchronized.html#几种锁" class="router-link-active router-link-exact-active toc-link level2">几种锁</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/synchronized.html#java对象头" class="router-link-active router-link-exact-active toc-link level3">Java对象头</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/synchronized.html#偏向锁" class="router-link-active router-link-exact-active toc-link level3">偏向锁</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/synchronized.html#轻量级锁" class="router-link-active router-link-exact-active toc-link level3">轻量级锁</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/synchronized.html#重量级锁" class="router-link-active router-link-exact-active toc-link level3">重量级锁</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/synchronized.html#锁的升级流程" class="router-link-active router-link-exact-active toc-link level3">锁的升级流程</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/synchronized.html#各种锁的优缺点对比" class="router-link-active router-link-exact-active toc-link level3">各种锁的优缺点对比</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="java中的synchronized关键字锁的到底是什么" tabindex="-1"><a class="header-anchor" href="#java中的synchronized关键字锁的到底是什么" aria-hidden="true">#</a> Java中的synchronized关键字锁的到底是什么？</h1><p>这篇文章我们来聊一聊Java多线程里面的“锁”。</p><p>首先需要明确的一点是：<strong>Java多线程的锁都是基于对象的</strong>，Java中的每一个对象都可以作为一个锁。</p><p>还有一点需要注意的是，我们常听到的<strong>类锁</strong>其实也是对象锁。</p><p>Java类只有一个Class对象（可以有多个实例对象，多个实例共享这个Class对象），而Class对象也是特殊的Java对象。所以我们常说的类锁，其实就是Class对象的锁。</p><h2 id="synchronized关键字" tabindex="-1"><a class="header-anchor" href="#synchronized关键字" aria-hidden="true">#</a> Synchronized关键字</h2><p>说到锁，我们通常会谈到<code>synchronized</code>这个关键字。它翻译成中文就是“同步”的意思。</p><p>我们通常使用<code>synchronized</code>关键字来给一段代码或一个方法上锁。它通常有以下三种形式：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token comment">// 关键字在实例方法上，锁为当前实例</span>
 <span class="token keyword">public</span> <span class="token keyword">synchronized</span> <span class="token keyword">void</span> <span class="token function">instanceLock</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
     <span class="token comment">// code</span>
 <span class="token punctuation">}</span>
@@ -89,6 +89,6 @@ OnDeck：任何时刻最多只能有一个线程正在竞争锁，该线程称
 Owner：获得锁的线程称为Owner
 !Owner：释放锁的线程
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>当一个线程尝试获得锁时，如果该锁已经被占用，则会将该线程封装成一个<code>ObjectWaiter</code>对象插入到Contention List的队列的队首，然后调用<code>park</code>函数挂起当前线程。</p><p>当线程释放锁时，会从Contention List或EntryList中挑选一个线程唤醒，被选中的线程叫做<code>Heir presumptive</code>即假定继承人，假定继承人被唤醒后会尝试获得锁，但<code>synchronized</code>是非公平的，所以假定继承人不一定能获得锁。这是因为对于重量级锁，线程先自旋尝试获得锁，这样做的目的是为了减少执行操作系统同步操作带来的开销。如果自旋不成功再进入等待队列。这对那些已经在等待队列中的线程来说，稍微显得不公平，还有一个不公平的地方是自旋线程可能会抢占了Ready线程的锁。</p><p>如果线程获得锁后调用<code>Object.wait</code>方法，则会将线程加入到WaitSet中，当被<code>Object.notify</code>唤醒后，会将线程从WaitSet移动到Contention List或EntryList中去。需要注意的是，当调用一个锁对象的<code>wait</code>或<code>notify</code>方法时，<strong>如当前锁的状态是偏向锁或轻量级锁则会先膨胀成重量级锁</strong>。</p><h3 id="锁的升级流程" tabindex="-1"><a class="header-anchor" href="#锁的升级流程" aria-hidden="true">#</a> 锁的升级流程</h3><p>每一个线程在准备获取共享资源时： 第一步，检查MarkWord里面是不是放的自己的ThreadId ,如果是，表示当前线程是处于 “偏向锁” 。</p><p>第二步，如果MarkWord不是自己的ThreadId，锁升级，这时候，用CAS来执行切换，新的线程根据MarkWord里面现有的ThreadId，通知之前线程暂停，之前线程将Markword的内容置为空。</p><p>第三步，两个线程都把锁对象的HashCode复制到自己新建的用于存储锁的记录空间，接着开始通过CAS操作， 把锁对象的MarKword的内容修改为自己新建的记录空间的地址的方式竞争MarkWord。</p><p>第四步，第三步中成功执行CAS的获得资源，失败的则进入自旋 。</p><p>第五步，自旋的线程在自旋过程中，成功获得资源(即之前获的资源的线程执行完成并释放了共享资源)，则整个状态依然处于 轻量级锁的状态，如果自旋失败 。</p><p>第六步，进入重量级锁的状态，这个时候，自旋的线程进行阻塞，等待之前线程执行完成并唤醒自己。</p><h3 id="各种锁的优缺点对比" tabindex="-1"><a class="header-anchor" href="#各种锁的优缺点对比" aria-hidden="true">#</a> 各种锁的优缺点对比</h3><p>下表来自《Java并发编程的艺术》：</p><table><thead><tr><th>锁</th><th>优点</th><th>缺点</th><th>适用场景</th></tr></thead><tbody><tr><td>偏向锁</td><td>加锁和解锁不需要额外的消耗，和执行非同步方法比仅存在纳秒级的差距。</td><td>如果线程间存在锁竞争，会带来额外的锁撤销的消耗。</td><td>适用于只有一个线程访问同步块场景。</td></tr><tr><td>轻量级锁</td><td>竞争的线程不会阻塞，提高了程序的响应速度。</td><td>如果始终得不到锁竞争的线程使用自旋会消耗CPU。</td><td>追求响应时间。同步块执行速度非常快。</td></tr><tr><td>重量级锁</td><td>线程竞争不使用自旋，不会消耗CPU。</td><td>线程阻塞，响应时间缓慢。</td><td>追求吞吐量。同步块执行时间较长。</td></tr></tbody></table><hr><blockquote><p>编辑：沉默王二，内容大部分来源以下三个开源仓库：</p><ul><li><a href="http://concurrent.redspider.group/" target="_blank" rel="noopener noreferrer">深入浅出 Java 多线程<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 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class="title">2.4 字符串&amp;数组</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.5 集合框架（容器）</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.6 IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">2.11 并发编程</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/thread/wangzhe-thread.html" class="nav-link sidebar-link sidebar-page" aria-label="创建Java线程的3种方式"><!---->创建Java线程的3种方式<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/thread-state-and-method.html" class="nav-link sidebar-link sidebar-page" aria-label="线程的6种状态及切换"><!---->线程的6种状态及切换<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/thread-group-and-thread-priority.html" class="nav-link sidebar-link sidebar-page" aria-label="线程组和线程优先级"><!---->线程组和线程优先级<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/why-need-thread.html" class="nav-link sidebar-link sidebar-page" aria-label="进程与线程的区别"><!---->进程与线程的区别<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/thread/thread-bring-some-problem.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="并发编程带来了哪些问题"><!---->并发编程带来了哪些问题<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/thread-bring-some-problem.html#线程安全问题" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="线程安全问题"><!---->线程安全问题<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/thread-bring-some-problem.html#活跃性问题" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="活跃性问题"><!---->活跃性问题<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/thread-bring-some-problem.html#性能问题" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="性能问题"><!---->性能问题<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/thread-bring-some-problem.html#有态度的总结" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="有态度的总结"><!---->有态度的总结<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/thread/jmm.html" class="nav-link sidebar-link sidebar-page" aria-label="Java内存模型"><!---->Java内存模型<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/volatile.html" class="nav-link sidebar-link sidebar-page" aria-label="volatile"><!---->volatile<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/synchronized.html" class="nav-link sidebar-link sidebar-page" aria-label="synchronized"><!---->synchronized<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/cas.html" class="nav-link sidebar-link sidebar-page" aria-label="CAS的原理"><!---->CAS的原理<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/aqs.html" class="nav-link sidebar-link sidebar-page" aria-label="AQS详解"><!---->AQS详解<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/lock.html" class="nav-link sidebar-link sidebar-page" aria-label="锁"><!---->锁<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/reentrantLock.html" class="nav-link sidebar-link sidebar-page" aria-label="重入锁ReentrantLock"><!---->重入锁ReentrantLock<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ReentrantReadWriteLock.html" class="nav-link sidebar-link sidebar-page" aria-label="读写锁ReentrantReadWriteLock"><!---->读写锁ReentrantReadWriteLock<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/condition.html" class="nav-link sidebar-link sidebar-page" aria-label="线程协作类Condition"><!---->线程协作类Condition<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/LockSupport.html" class="nav-link sidebar-link sidebar-page" aria-label="线程阻塞唤醒类LockSupport"><!---->线程阻塞唤醒类LockSupport<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/map.html" class="nav-link sidebar-link sidebar-page" aria-label="并发集合容器"><!---->并发集合容器<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ConcurrentHashMap.html" class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentHashMap"><!---->ConcurrentHashMap<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ConcurrentLinkedQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentLinkedQueue"><!---->ConcurrentLinkedQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CopyOnWriteArrayList.html" class="nav-link sidebar-link sidebar-page" aria-label="CopyOnWriteArrayList"><!---->CopyOnWriteArrayList<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ThreadLocal.html" class="nav-link sidebar-link sidebar-page" aria-label="ThreadLocal"><!---->ThreadLocal<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/BlockingQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="BlockingQueue"><!---->BlockingQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/pool.html" class="nav-link sidebar-link sidebar-page" aria-label="线程池"><!---->线程池<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ScheduledThreadPoolExecutor.html" class="nav-link sidebar-link sidebar-page" aria-label="计划任务"><!---->计划任务<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/atomic.html" class="nav-link sidebar-link sidebar-page" aria-label="原子操作类"><!---->原子操作类<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CountDownLatch.html" class="nav-link sidebar-link sidebar-page" aria-label="通信工具类CountDownLatch"><!---->通信工具类CountDownLatch<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/fork-join.html" class="nav-link sidebar-link sidebar-page" aria-label="Fork/Join框架"><!---->Fork/Join框架<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/shengchanzhe-xiaofeizhe.html" class="nav-link sidebar-link sidebar-page" aria-label="生产者-消费者模式"><!---->生产者-消费者模式<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->并发编程带来了哪些问题？</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月23日</span><meta property="datePublished" content="2022-03-23T12:08:58.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><li class="category category6" role>并发编程</li><meta property="articleSection" content="Java核心,并发编程"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 9 分钟</span><meta property="timeRequired" content="PT9M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/thread-bring-some-problem.html#线程安全问题" class="router-link-active router-link-exact-active toc-link level2">线程安全问题</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/thread-bring-some-problem.html#活跃性问题" class="router-link-active router-link-exact-active toc-link level2">活跃性问题</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/thread-bring-some-problem.html#性能问题" class="router-link-active router-link-exact-active toc-link level2">性能问题</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/thread-bring-some-problem.html#有态度的总结" class="router-link-active router-link-exact-active toc-link level2">有态度的总结</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="并发编程带来了哪些问题" tabindex="-1"><a class="header-anchor" href="#并发编程带来了哪些问题" aria-hidden="true">#</a> 并发编程带来了哪些问题？</h1><p>多线程技术有这么多的好处，难道就没有一点缺点么，就在任何场景下就一定适用么？很显然不是。</p><p>在实际工作中，错误使用多线程非但不能提高效率还可能使程序崩溃。以在路上开车为例：</p><p>在一个单向行驶的道路上，每辆汽车都遵守交通规则，这时候整体通行是正常的。『单向车道』意味着『一个线程』，『多辆车』意味着『多个job任务』。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/thread-bring-some-problem-c0a03b79-36d8-4120-888e-0597aa66ca5b.png" alt="单线程顺利同行"></p><p>如果需要提升车辆的同行效率，一般的做法就是扩展车道，对应程序来说就是『加线程池』，增加线程数。这样在同一时间内，通行的车辆数远远大于单车道。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/thread-bring-some-problem-a65346bc-7b8b-4883-9d85-d07859df2e69.png" alt="多线程顺利同行"></p><p>然而成年人的世界没有那么完美，车道一旦多起来『加塞』的场景就会越来越多，出现碰撞后也会影响整条马路的通行效率。这么一对比下来『多车道』确实可能比『单车道』要慢。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/thread-bring-some-problem-532930da-03fe-4a59-aee8-0b97b5f1a966.png" alt="多线程故障"></p><p>防止汽车频繁变道加塞可以采取在车道间增加『护栏』，那在程序的世界该怎么做呢？</p><p>程序世界中多线程遇到的问题归纳起来就是三类：<code>『线程安全问题』</code>、<code>『活跃性问题』</code>、<code>『性能问题』</code>，接下来会讲解这些问题，以及问题对应的解决手段。</p><h2 id="线程安全问题" tabindex="-1"><a class="header-anchor" href="#线程安全问题" aria-hidden="true">#</a> 线程安全问题</h2><p>有时候我们会发现，明明在单线程环境中正常运行的代码，在多线程环境中可能会出现意料之外的结果，其实这就是大家常说的『线程不安全』。那到底什么是线程不安全呢？往下看。</p><p><strong>原子性</strong></p><p>举一个银行转账的例子，比如从账户A向账户B转1000元，那么必然包括2个操作：从账户A减去1000元，往账户B加上1000元，两个操作都成功才意味着一次转账最终成功。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/thread-bring-some-problem-eba43c92-e42d-4318-a40c-b9365c32d922.png" alt=""></p><p>试想一下，如果这两个操作不具备原子性，从A的账户扣减了1000元之后，操作突然终止了，账户B没有增加1000元，那问题就大了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/thread-bring-some-problem-c22ae9be-bd80-4613-9c7e-3feb83c6c83f.png" alt=""></p><p>银行转账这个例子有两个步骤，出现了意外后导致转账失败，说明没有原子性。</p><blockquote><p>原子性：即一个操作或者多个操作 要么全部执行并且执行的过程不会被任何因素打断，要么就都不执行。</p><p>原子操作：即不会被线程调度机制打断的操作，没有上下文切换。</p></blockquote><p>在并发编程中很多操作都不是原子操作，出个小题目：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code>i <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span> <span class="token comment">// 操作1</span>
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class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/cas.html" class="nav-link sidebar-link sidebar-page" aria-label="CAS的原理"><!---->CAS的原理<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/aqs.html" class="nav-link sidebar-link sidebar-page" aria-label="AQS详解"><!---->AQS详解<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/lock.html" class="nav-link sidebar-link sidebar-page" aria-label="锁"><!---->锁<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/reentrantLock.html" class="nav-link sidebar-link sidebar-page" aria-label="重入锁ReentrantLock"><!---->重入锁ReentrantLock<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ReentrantReadWriteLock.html" class="nav-link sidebar-link sidebar-page" aria-label="读写锁ReentrantReadWriteLock"><!---->读写锁ReentrantReadWriteLock<!----></a><ul 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aria-label="ConcurrentLinkedQueue"><!---->ConcurrentLinkedQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CopyOnWriteArrayList.html" class="nav-link sidebar-link sidebar-page" aria-label="CopyOnWriteArrayList"><!---->CopyOnWriteArrayList<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ThreadLocal.html" class="nav-link sidebar-link sidebar-page" aria-label="ThreadLocal"><!---->ThreadLocal<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/BlockingQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="BlockingQueue"><!---->BlockingQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/pool.html" class="nav-link sidebar-link sidebar-page" aria-label="线程池"><!---->线程池<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ScheduledThreadPoolExecutor.html" class="nav-link sidebar-link sidebar-page" aria-label="计划任务"><!---->计划任务<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/atomic.html" class="nav-link sidebar-link sidebar-page" aria-label="原子操作类"><!---->原子操作类<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CountDownLatch.html" class="nav-link sidebar-link sidebar-page" aria-label="通信工具类CountDownLatch"><!---->通信工具类CountDownLatch<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/fork-join.html" class="nav-link sidebar-link sidebar-page" aria-label="Fork/Join框架"><!---->Fork/Join框架<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/shengchanzhe-xiaofeizhe.html" class="nav-link sidebar-link sidebar-page" aria-label="生产者-消费者模式"><!---->生产者-消费者模式<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->并发编程带来了哪些问题？</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月23日</span><meta property="datePublished" content="2022-03-23T12:08:58.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 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9 分钟</span><meta property="timeRequired" content="PT9M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/thread-bring-some-problem.html#线程安全问题" class="router-link-active router-link-exact-active toc-link level2">线程安全问题</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/thread-bring-some-problem.html#活跃性问题" class="router-link-active router-link-exact-active toc-link level2">活跃性问题</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/thread-bring-some-problem.html#性能问题" class="router-link-active router-link-exact-active toc-link level2">性能问题</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/thread-bring-some-problem.html#有态度的总结" class="router-link-active router-link-exact-active toc-link level2">有态度的总结</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="并发编程带来了哪些问题" tabindex="-1"><a class="header-anchor" href="#并发编程带来了哪些问题" aria-hidden="true">#</a> 并发编程带来了哪些问题？</h1><p>多线程技术有这么多的好处，难道就没有一点缺点么，就在任何场景下就一定适用么？很显然不是。</p><p>在实际工作中，错误使用多线程非但不能提高效率还可能使程序崩溃。以在路上开车为例：</p><p>在一个单向行驶的道路上，每辆汽车都遵守交通规则，这时候整体通行是正常的。『单向车道』意味着『一个线程』，『多辆车』意味着『多个job任务』。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/thread-bring-some-problem-c0a03b79-36d8-4120-888e-0597aa66ca5b.png" alt="单线程顺利同行"></p><p>如果需要提升车辆的同行效率，一般的做法就是扩展车道，对应程序来说就是『加线程池』，增加线程数。这样在同一时间内，通行的车辆数远远大于单车道。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/thread-bring-some-problem-a65346bc-7b8b-4883-9d85-d07859df2e69.png" alt="多线程顺利同行"></p><p>然而成年人的世界没有那么完美，车道一旦多起来『加塞』的场景就会越来越多，出现碰撞后也会影响整条马路的通行效率。这么一对比下来『多车道』确实可能比『单车道』要慢。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/thread-bring-some-problem-532930da-03fe-4a59-aee8-0b97b5f1a966.png" alt="多线程故障"></p><p>防止汽车频繁变道加塞可以采取在车道间增加『护栏』，那在程序的世界该怎么做呢？</p><p>程序世界中多线程遇到的问题归纳起来就是三类：<code>『线程安全问题』</code>、<code>『活跃性问题』</code>、<code>『性能问题』</code>，接下来会讲解这些问题，以及问题对应的解决手段。</p><h2 id="线程安全问题" tabindex="-1"><a class="header-anchor" href="#线程安全问题" aria-hidden="true">#</a> 线程安全问题</h2><p>有时候我们会发现，明明在单线程环境中正常运行的代码，在多线程环境中可能会出现意料之外的结果，其实这就是大家常说的『线程不安全』。那到底什么是线程不安全呢？往下看。</p><p><strong>原子性</strong></p><p>举一个银行转账的例子，比如从账户A向账户B转1000元，那么必然包括2个操作：从账户A减去1000元，往账户B加上1000元，两个操作都成功才意味着一次转账最终成功。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/thread-bring-some-problem-eba43c92-e42d-4318-a40c-b9365c32d922.png" alt=""></p><p>试想一下，如果这两个操作不具备原子性，从A的账户扣减了1000元之后，操作突然终止了，账户B没有增加1000元，那问题就大了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/thread-bring-some-problem-c22ae9be-bd80-4613-9c7e-3feb83c6c83f.png" alt=""></p><p>银行转账这个例子有两个步骤，出现了意外后导致转账失败，说明没有原子性。</p><blockquote><p>原子性：即一个操作或者多个操作 要么全部执行并且执行的过程不会被任何因素打断，要么就都不执行。</p><p>原子操作：即不会被线程调度机制打断的操作，没有上下文切换。</p></blockquote><p>在并发编程中很多操作都不是原子操作，出个小题目：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code>i <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span> <span class="token comment">// 操作1</span>
 i<span class="token operator">++</span><span class="token punctuation">;</span>   <span class="token comment">// 操作2</span>
 i <span class="token operator">=</span> j<span class="token punctuation">;</span> <span class="token comment">// 操作3</span>
 i <span class="token operator">=</span> i <span class="token operator">+</span> <span class="token number">1</span><span class="token punctuation">;</span> <span class="token comment">// 操作4</span>
@@ -65,6 +65,6 @@ i <span class="token operator">=</span> i <span class="token operator">+</span>
   <span class="token punctuation">}</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>线程1执行update方法将 i 赋值为100，一般情况下线程1会在自己的工作内存中完成赋值操作，却没有及时将新值刷新到主内存中。</p><p>这个时候线程2执行get方法，首先会从主内存中读取i的值，然后加载到自己的工作内存中，这个时候读取到i的值是50，再将50赋值给j，最后返回j的值就是50了。原本期望返回100，结果返回50，这就是可见性问题，线程1对变量i进行了修改，线程2没有立即看到i的新值。</p><blockquote><p>可见性：指当多个线程访问同一个变量时，一个线程修改了这个变量的值，其他线程能够立即看得到修改的值。</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/thread-bring-some-problem-d91ca0c2-4f39-4e98-90e2-8acb793eb983.png" alt=""></p><p>如上图每个线程都有属于自己的工作内存，工作内存和主内存间需要通过store和load等进行交互。</p><p>为了解决多线程可见性问题，Java语言提供了<code>volatile</code>这个关键字。当一个共享变量被volatile修饰时，它会保证修改的值会立即被更新到主存，当有其他线程需要读取时，它会去内存中读取新值。而普通共享变量不能保证可见性，因为变量被修改后什么时候刷回到主存是不确定的，另外一个线程读的可能就是旧值。</p><p>当然Java的锁机制如synchronize和lock也是可以保证可见性的，加锁可以保证在同一时刻只有一个线程在执行同步代码块，释放锁之前会将变量刷回至主存，这样也就保证了可见性。</p><p>关于线程不安全的表现还有『有序性』，这个问题会在后面的文章中深入讲解。</p><h2 id="活跃性问题" tabindex="-1"><a class="header-anchor" href="#活跃性问题" aria-hidden="true">#</a> 活跃性问题</h2><p>上面讲到为了解决<code>可见性</code>问题，我们可以采取加锁方式解决，但是如果加锁使用不当也容易引入其他问题，比如『死锁』。</p><p>在说『死锁』前我们先引入另外一个概念：<code>活跃性问题</code>。</p><blockquote><p>活跃性是指某件正确的事情最终会发生，当某个操作无法继续下去的时候，就会发生活跃性问题。</p></blockquote><p>概念是不是有点拗口，如果看不懂也没关系，你可以记住活跃性问题一般有这样几类：<code>死锁</code>，<code>活锁</code>，<code>饥饿问题</code>。</p><p><strong>（1）死锁</strong></p><p>死锁是指多个线程因为环形的等待锁的关系而永远的阻塞下去。一图胜千语，不多解释。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/thread-bring-some-problem-d4e65d5f-3de1-4a1c-8ae1-02cb3bfb528c.png" alt=""></p><p><strong>（2）活锁</strong></p><p>死锁是两个线程都在等待对方释放锁导致阻塞。而<code>活锁</code>的意思是线程没有阻塞，还活着呢。</p><p>当多个线程都在运行并且修改各自的状态，而其他线程彼此依赖这个状态，导致任何一个线程都无法继续执行，只能重复着自身的动作和修改自身的状态，这种场景就是发生了活锁。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/thread-bring-some-problem-d1f9e916-0985-46fe-bf87-63fccfd27bae.png" alt=""></p><p>如果大家还有疑惑，那我再举一个生活中的例子，大家平时在走路的时候，迎面走来一个人，两个人互相让路，但是又同时走到了一个方向，如果一直这样重复着避让，这俩人就是发生了活锁，学到了吧，嘿嘿。</p><p><strong>（3）饥饿</strong></p><p>如果一个线程无其他异常却迟迟不能继续运行，那基本是处于饥饿状态了。</p><p>常见有几种场景:</p><ul><li>高优先级的线程一直在运行消耗CPU，所有的低优先级线程一直处于等待；</li><li>一些线程被永久堵塞在一个等待进入同步块的状态，而其他线程总是能在它之前持续地对该同步块进行访问；</li></ul><p>有一个非常经典的饥饿问题就是<code>哲学家用餐问题</code>，如下图所示，有五个哲学家在用餐，每个人必须要同时拿两把叉子才可以开始就餐，如果哲学家1和哲学家3同时开始就餐，那哲学家2、4、5就得饿肚子等待了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/thread-bring-some-problem-314a47df-c953-4b7d-831c-007173981819.png" alt=""></p><h2 id="性能问题" tabindex="-1"><a class="header-anchor" href="#性能问题" aria-hidden="true">#</a> 性能问题</h2><p>前面讲到了线程安全和死锁、活锁这些问题会影响多线程执行过程，如果这些都没有发生，多线程并发一定比单线程串行执行快吗，答案是不一定，因为多线程有<code>创建线程</code>和<code>线程上下文切换</code>的开销。</p><p>创建线程是直接向系统申请资源的，对操作系统来说创建一个线程的代价是十分昂贵的，需要给它分配内存、列入调度等。</p><p>线程创建完之后，还会遇到线程<code>上下文切换</code>。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/thread-bring-some-problem-d125d0b9-3b60-46cd-a79f-a26dd5210b44.png" alt=""></p><p>CPU是很宝贵的资源速度也非常快，为了保证雨露均沾，通常为给不同的线程分配<code>时间片</code>，当CPU从执行一个线程切换到执行另一个线程时，CPU 需要保存当前线程的本地数据，程序指针等状态，并加载下一个要执行的线程的本地数据，程序指针等，这个开关被称为『上下文切换』。</p><p>一般减少上下文切换的方法有：</p><ul><li>无锁并发编程：可以参照concurrentHashMap锁分段的思想，不同的线程处理不同段的数据，这样在多线程竞争的条件下，可以减少上下文切换的时间。</li><li>CAS算法，利用Atomic下使用CAS算法来更新数据，使用了乐观锁，可以有效的减少一部分不必要的锁竞争带来的上下文切换</li><li>使用最少线程：避免创建不需要的线程，比如任务很少，但是创建了很多的线程，这样会造成大量的线程都处于等待状态</li><li>协程：在单线程里实现多任务的调度，并在单线程里维持多个任务间的切换</li></ul><h2 id="有态度的总结" tabindex="-1"><a class="header-anchor" href="#有态度的总结" aria-hidden="true">#</a> 有态度的总结</h2><p>多线程用好了可以让程序的效率成倍提升，用不好可能比单线程还要慢。</p><p>用一张图总结一下上面讲的：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/thread-bring-some-problem-119223c9-83a9-42e1-9a0c-f9c706a1e793.png" alt=""></p><hr><blockquote><p>编辑：沉默王二，内容大部分来源以下三个开源仓库：</p><ul><li><a href="http://concurrent.redspider.group/" target="_blank" rel="noopener noreferrer">深入浅出 Java 多线程<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://github.com/CL0610/Java-concurrency" target="_blank" rel="noopener noreferrer">并发编程知识总结<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://github.com/CoderLeixiaoshuai/java-eight-part" target="_blank" rel="noopener noreferrer">Java八股文<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul></blockquote><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png"></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a 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class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/lock.html" class="nav-link sidebar-link sidebar-page" aria-label="锁"><!---->锁<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/reentrantLock.html" class="nav-link sidebar-link sidebar-page" aria-label="重入锁ReentrantLock"><!---->重入锁ReentrantLock<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ReentrantReadWriteLock.html" class="nav-link sidebar-link sidebar-page" aria-label="读写锁ReentrantReadWriteLock"><!---->读写锁ReentrantReadWriteLock<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/condition.html" class="nav-link sidebar-link sidebar-page" aria-label="线程协作类Condition"><!---->线程协作类Condition<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/LockSupport.html" class="nav-link sidebar-link sidebar-page" aria-label="线程阻塞唤醒类LockSupport"><!---->线程阻塞唤醒类LockSupport<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/map.html" class="nav-link sidebar-link sidebar-page" aria-label="并发集合容器"><!---->并发集合容器<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ConcurrentHashMap.html" class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentHashMap"><!---->ConcurrentHashMap<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ConcurrentLinkedQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentLinkedQueue"><!---->ConcurrentLinkedQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CopyOnWriteArrayList.html" class="nav-link sidebar-link sidebar-page" aria-label="CopyOnWriteArrayList"><!---->CopyOnWriteArrayList<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ThreadLocal.html" class="nav-link sidebar-link sidebar-page" aria-label="ThreadLocal"><!---->ThreadLocal<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/BlockingQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="BlockingQueue"><!---->BlockingQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/pool.html" class="nav-link sidebar-link sidebar-page" aria-label="线程池"><!---->线程池<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ScheduledThreadPoolExecutor.html" class="nav-link sidebar-link sidebar-page" aria-label="计划任务"><!---->计划任务<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/atomic.html" class="nav-link sidebar-link sidebar-page" aria-label="原子操作类"><!---->原子操作类<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CountDownLatch.html" class="nav-link sidebar-link sidebar-page" aria-label="通信工具类CountDownLatch"><!---->通信工具类CountDownLatch<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/fork-join.html" class="nav-link sidebar-link sidebar-page" aria-label="Fork/Join框架"><!---->Fork/Join框架<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/shengchanzhe-xiaofeizhe.html" class="nav-link sidebar-link sidebar-page" aria-label="生产者-消费者模式"><!---->生产者-消费者模式<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->线程组是什么？线程优先级如何设置？</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月23日</span><meta property="datePublished" content="2022-03-23T12:08:58.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 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class="router-link-active router-link-exact-active toc-link level2">线程组(ThreadGroup)</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/thread-group-and-thread-priority.html#线程的优先级" class="router-link-active router-link-exact-active toc-link level2">线程的优先级</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/thread-group-and-thread-priority.html#线程组的常用方法及数据结构" class="router-link-active router-link-exact-active toc-link level2">线程组的常用方法及数据结构</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/thread-group-and-thread-priority.html#线程组的常用方法" class="router-link-active router-link-exact-active toc-link level3">线程组的常用方法</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/thread-group-and-thread-priority.html#线程组的数据结构" class="router-link-active router-link-exact-active toc-link level3">线程组的数据结构</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="线程组是什么-线程优先级如何设置" tabindex="-1"><a class="header-anchor" href="#线程组是什么-线程优先级如何设置" aria-hidden="true">#</a> 线程组是什么？线程优先级如何设置？</h1><h2 id="线程组-threadgroup" tabindex="-1"><a class="header-anchor" href="#线程组-threadgroup" aria-hidden="true">#</a> 线程组(ThreadGroup)</h2><p>Java中用ThreadGroup来表示线程组，我们可以使用线程组对线程进行批量控制。</p><p>ThreadGroup和Thread的关系就如同他们的字面意思一样简单粗暴，每个Thread必然存在于一个ThreadGroup中，Thread不能独立于ThreadGroup存在。执行main()方法线程的名字是main，如果在new Thread时没有显式指定，那么默认将父线程（当前执行new Thread的线程）线程组设置为自己的线程组。</p><p>示例代码：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">Demo</span> <span class="token punctuation">{</span>
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href="/thread/volatile.html" class="nav-link sidebar-link sidebar-page" aria-label="volatile"><!---->volatile<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/synchronized.html" class="nav-link sidebar-link sidebar-page" aria-label="synchronized"><!---->synchronized<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/cas.html" class="nav-link sidebar-link sidebar-page" aria-label="CAS的原理"><!---->CAS的原理<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/aqs.html" class="nav-link sidebar-link sidebar-page" aria-label="AQS详解"><!---->AQS详解<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/lock.html" class="nav-link sidebar-link sidebar-page" aria-label="锁"><!---->锁<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/reentrantLock.html" class="nav-link sidebar-link sidebar-page" 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sidebar-link sidebar-page" aria-label="ConcurrentHashMap"><!---->ConcurrentHashMap<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ConcurrentLinkedQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentLinkedQueue"><!---->ConcurrentLinkedQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CopyOnWriteArrayList.html" class="nav-link sidebar-link sidebar-page" aria-label="CopyOnWriteArrayList"><!---->CopyOnWriteArrayList<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ThreadLocal.html" class="nav-link sidebar-link sidebar-page" aria-label="ThreadLocal"><!---->ThreadLocal<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/BlockingQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="BlockingQueue"><!---->BlockingQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/pool.html" class="nav-link sidebar-link sidebar-page" aria-label="线程池"><!---->线程池<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ScheduledThreadPoolExecutor.html" class="nav-link sidebar-link sidebar-page" aria-label="计划任务"><!---->计划任务<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/atomic.html" class="nav-link sidebar-link sidebar-page" aria-label="原子操作类"><!---->原子操作类<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CountDownLatch.html" class="nav-link sidebar-link sidebar-page" aria-label="通信工具类CountDownLatch"><!---->通信工具类CountDownLatch<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/fork-join.html" class="nav-link sidebar-link sidebar-page" aria-label="Fork/Join框架"><!---->Fork/Join框架<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/shengchanzhe-xiaofeizhe.html" class="nav-link sidebar-link sidebar-page" aria-label="生产者-消费者模式"><!---->生产者-消费者模式<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->线程组是什么？线程优先级如何设置？</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" 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18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><li class="category category6" role>并发编程</li><meta property="articleSection" content="Java核心,并发编程"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 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88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 7 分钟</span><meta property="timeRequired" content="PT7M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/thread-group-and-thread-priority.html#线程组-threadgroup" class="router-link-active router-link-exact-active toc-link level2">线程组(ThreadGroup)</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/thread-group-and-thread-priority.html#线程的优先级" class="router-link-active router-link-exact-active toc-link level2">线程的优先级</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/thread-group-and-thread-priority.html#线程组的常用方法及数据结构" class="router-link-active router-link-exact-active toc-link level2">线程组的常用方法及数据结构</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/thread-group-and-thread-priority.html#线程组的常用方法" class="router-link-active router-link-exact-active toc-link level3">线程组的常用方法</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/thread-group-and-thread-priority.html#线程组的数据结构" class="router-link-active router-link-exact-active toc-link level3">线程组的数据结构</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="线程组是什么-线程优先级如何设置" tabindex="-1"><a class="header-anchor" href="#线程组是什么-线程优先级如何设置" aria-hidden="true">#</a> 线程组是什么？线程优先级如何设置？</h1><h2 id="线程组-threadgroup" tabindex="-1"><a class="header-anchor" href="#线程组-threadgroup" aria-hidden="true">#</a> 线程组(ThreadGroup)</h2><p>Java中用ThreadGroup来表示线程组，我们可以使用线程组对线程进行批量控制。</p><p>ThreadGroup和Thread的关系就如同他们的字面意思一样简单粗暴，每个Thread必然存在于一个ThreadGroup中，Thread不能独立于ThreadGroup存在。执行main()方法线程的名字是main，如果在new Thread时没有显式指定，那么默认将父线程（当前执行new Thread的线程）线程组设置为自己的线程组。</p><p>示例代码：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">Demo</span> <span class="token punctuation">{</span>
     <span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">void</span> <span class="token function">main</span><span class="token punctuation">(</span><span class="token class-name">String</span><span class="token punctuation">[</span><span class="token punctuation">]</span> args<span class="token punctuation">)</span> <span class="token punctuation">{</span>
         <span class="token class-name">Thread</span> testThread <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">Thread</span><span class="token punctuation">(</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">-&gt;</span> <span class="token punctuation">{</span>
             <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">&quot;testThread当前线程组名字：&quot;</span> <span class="token operator">+</span>
@@ -193,6 +193,6 @@ threadGroup<span class="token punctuation">.</span><span class="token function">
     <span class="token punctuation">}</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><blockquote><p>这里涉及到<code>SecurityManager</code>这个类，它是Java的安全管理器，它允许应用程序在执行一个可能不安全或敏感的操作前确定该操作是什么，以及是否是在允许执行该操作的安全上下文中执行它。应用程序可以允许或不允许该操作。</p><p>比如引入了第三方类库，但是并不能保证它的安全性。</p><p>其实Thread类也有一个checkAccess()方法，不过是用来当前运行的线程是否有权限修改被调用的这个线程实例。（Determines if the currently running thread has permission to modify this thread.）</p></blockquote><p>总结来说，线程组是一个树状的结构，每个线程组下面可以有多个线程或者线程组。线程组可以起到统一控制线程的优先级和检查线程的权限的作用。</p><hr><blockquote><p>编辑：沉默王二，内容大部分来源以下三个开源仓库：</p><ul><li><a href="http://concurrent.redspider.group/" target="_blank" rel="noopener noreferrer">深入浅出 Java 多线程<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://github.com/CL0610/Java-concurrency" target="_blank" rel="noopener noreferrer">并发编程知识总结<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" 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class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/cas.html" class="nav-link sidebar-link sidebar-page" aria-label="CAS的原理"><!---->CAS的原理<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/aqs.html" class="nav-link sidebar-link sidebar-page" aria-label="AQS详解"><!---->AQS详解<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/lock.html" class="nav-link sidebar-link sidebar-page" aria-label="锁"><!---->锁<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/reentrantLock.html" class="nav-link sidebar-link sidebar-page" aria-label="重入锁ReentrantLock"><!---->重入锁ReentrantLock<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ReentrantReadWriteLock.html" class="nav-link sidebar-link sidebar-page" aria-label="读写锁ReentrantReadWriteLock"><!---->读写锁ReentrantReadWriteLock<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/condition.html" class="nav-link sidebar-link sidebar-page" aria-label="线程协作类Condition"><!---->线程协作类Condition<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/LockSupport.html" class="nav-link sidebar-link sidebar-page" aria-label="线程阻塞唤醒类LockSupport"><!---->线程阻塞唤醒类LockSupport<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/map.html" class="nav-link sidebar-link sidebar-page" aria-label="并发集合容器"><!---->并发集合容器<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ConcurrentHashMap.html" class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentHashMap"><!---->ConcurrentHashMap<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ConcurrentLinkedQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentLinkedQueue"><!---->ConcurrentLinkedQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CopyOnWriteArrayList.html" class="nav-link sidebar-link sidebar-page" aria-label="CopyOnWriteArrayList"><!---->CopyOnWriteArrayList<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ThreadLocal.html" class="nav-link sidebar-link sidebar-page" aria-label="ThreadLocal"><!---->ThreadLocal<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/BlockingQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="BlockingQueue"><!---->BlockingQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/pool.html" class="nav-link sidebar-link sidebar-page" aria-label="线程池"><!---->线程池<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ScheduledThreadPoolExecutor.html" class="nav-link sidebar-link sidebar-page" aria-label="计划任务"><!---->计划任务<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/atomic.html" class="nav-link sidebar-link sidebar-page" aria-label="原子操作类"><!---->原子操作类<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CountDownLatch.html" class="nav-link sidebar-link sidebar-page" aria-label="通信工具类CountDownLatch"><!---->通信工具类CountDownLatch<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/fork-join.html" class="nav-link sidebar-link sidebar-page" aria-label="Fork/Join框架"><!---->Fork/Join框架<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/shengchanzhe-xiaofeizhe.html" class="nav-link sidebar-link sidebar-page" aria-label="生产者-消费者模式"><!---->生产者-消费者模式<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java线程的6种状态及切换(透彻讲解)</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" 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12 分钟</span><meta property="timeRequired" content="PT12M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/thread-state-and-method.html#操作系统中的线程状态转换" class="router-link-active router-link-exact-active toc-link level2">操作系统中的线程状态转换</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/thread-state-and-method.html#java线程的6个状态" class="router-link-active router-link-exact-active toc-link level2">Java线程的6个状态</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/thread-state-and-method.html#new" class="router-link-active router-link-exact-active toc-link level3">NEW</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/thread-state-and-method.html#runnable" class="router-link-active router-link-exact-active toc-link level3">RUNNABLE</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/thread-state-and-method.html#blocked" class="router-link-active router-link-exact-active toc-link level3">BLOCKED</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/thread-state-and-method.html#waiting" class="router-link-active router-link-exact-active toc-link level3">WAITING</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/thread-state-and-method.html#timed-waiting" class="router-link-active router-link-exact-active toc-link level3">TIMED_WAITING</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/thread-state-and-method.html#terminated" class="router-link-active router-link-exact-active toc-link level3">TERMINATED</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/thread-state-and-method.html#线程状态的转换" class="router-link-active router-link-exact-active toc-link level2">线程状态的转换</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/thread-state-and-method.html#blocked与runnable状态的转换" class="router-link-active router-link-exact-active toc-link level3">BLOCKED与RUNNABLE状态的转换</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/thread-state-and-method.html#waiting状态与runnable状态的转换" class="router-link-active router-link-exact-active toc-link level3">WAITING状态与RUNNABLE状态的转换</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/thread-state-and-method.html#timed-waiting与runnable状态转换" class="router-link-active router-link-exact-active toc-link level3">TIMED_WAITING与RUNNABLE状态转换</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/thread-state-and-method.html#线程中断" class="router-link-active router-link-exact-active toc-link level3">线程中断</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="java线程的6种状态及切换-透彻讲解" tabindex="-1"><a class="header-anchor" href="#java线程的6种状态及切换-透彻讲解" aria-hidden="true">#</a> Java线程的6种状态及切换(透彻讲解)</h1><h2 id="操作系统中的线程状态转换" tabindex="-1"><a class="header-anchor" href="#操作系统中的线程状态转换" aria-hidden="true">#</a> 操作系统中的线程状态转换</h2><p>首先我们来看看操作系统中的线程状态转换。</p><blockquote><p>在现在的操作系统中，线程是被视为轻量级进程的，所以<strong>操作系统线程的状态其实和操作系统进程的状态是一致的</strong>。</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/thread-state-and-method-f60caaad-ad47-4edc-8d0a-ab736c2e8500.png" alt="系统进程/线程转换图"></p><p>操作系统线程主要有以下三个状态：</p><ul><li>就绪状态(ready)：线程正在等待使用CPU，经调度程序调用之后可进入running状态。</li><li>执行状态(running)：线程正在使用CPU。</li><li>等待状态(waiting): 线程经过等待事件的调用或者正在等待其他资源（如I/O）。</li></ul><h2 id="java线程的6个状态" tabindex="-1"><a class="header-anchor" href="#java线程的6个状态" aria-hidden="true">#</a> Java线程的6个状态</h2><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token comment">// Thread.State 源码</span>
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clickable"><!----><span class="title">2.1 Java概述</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.2 Java基础语法</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.3 面向对象编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.4 字符串&amp;数组</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.5 集合框架（容器）</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.6 IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">2.11 并发编程</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/thread/wangzhe-thread.html" class="nav-link sidebar-link sidebar-page" aria-label="创建Java线程的3种方式"><!---->创建Java线程的3种方式<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/thread/thread-state-and-method.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="线程的6种状态及切换"><!---->线程的6种状态及切换<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/thread-state-and-method.html#操作系统中的线程状态转换" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="操作系统中的线程状态转换"><!---->操作系统中的线程状态转换<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/thread-state-and-method.html#java线程的6个状态" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="Java线程的6个状态"><!---->Java线程的6个状态<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/thread-state-and-method.html#new" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="NEW"><!---->NEW<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/thread-state-and-method.html#runnable" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="RUNNABLE"><!---->RUNNABLE<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/thread-state-and-method.html#blocked" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="BLOCKED"><!---->BLOCKED<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/thread-state-and-method.html#waiting" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="WAITING"><!---->WAITING<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/thread-state-and-method.html#timed-waiting" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="TIMED_WAITING"><!---->TIMED_WAITING<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/thread-state-and-method.html#terminated" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="TERMINATED"><!---->TERMINATED<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/thread-state-and-method.html#线程状态的转换" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="线程状态的转换"><!---->线程状态的转换<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/thread/thread-state-and-method.html#blocked与runnable状态的转换" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="BLOCKED与RUNNABLE状态的转换"><!---->BLOCKED与RUNNABLE状态的转换<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/thread-state-and-method.html#waiting状态与runnable状态的转换" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="WAITING状态与RUNNABLE状态的转换"><!---->WAITING状态与RUNNABLE状态的转换<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/thread-state-and-method.html#timed-waiting与runnable状态转换" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="TIMED_WAITING与RUNNABLE状态转换"><!---->TIMED_WAITING与RUNNABLE状态转换<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/thread/thread-state-and-method.html#线程中断" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="线程中断"><!---->线程中断<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li></ul><!--]--></li><li><!--[--><a href="/thread/thread-group-and-thread-priority.html" class="nav-link sidebar-link sidebar-page" aria-label="线程组和线程优先级"><!---->线程组和线程优先级<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/why-need-thread.html" class="nav-link sidebar-link sidebar-page" aria-label="进程与线程的区别"><!---->进程与线程的区别<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/thread-bring-some-problem.html" class="nav-link sidebar-link sidebar-page" aria-label="并发编程带来了哪些问题"><!---->并发编程带来了哪些问题<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/jmm.html" class="nav-link sidebar-link sidebar-page" aria-label="Java内存模型"><!---->Java内存模型<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/volatile.html" class="nav-link sidebar-link sidebar-page" aria-label="volatile"><!---->volatile<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/synchronized.html" class="nav-link sidebar-link sidebar-page" aria-label="synchronized"><!---->synchronized<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/cas.html" class="nav-link sidebar-link sidebar-page" aria-label="CAS的原理"><!---->CAS的原理<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/aqs.html" class="nav-link sidebar-link sidebar-page" aria-label="AQS详解"><!---->AQS详解<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/lock.html" class="nav-link sidebar-link sidebar-page" aria-label="锁"><!---->锁<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/reentrantLock.html" class="nav-link sidebar-link sidebar-page" aria-label="重入锁ReentrantLock"><!---->重入锁ReentrantLock<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ReentrantReadWriteLock.html" class="nav-link sidebar-link sidebar-page" aria-label="读写锁ReentrantReadWriteLock"><!---->读写锁ReentrantReadWriteLock<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/condition.html" class="nav-link sidebar-link sidebar-page" aria-label="线程协作类Condition"><!---->线程协作类Condition<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/LockSupport.html" class="nav-link sidebar-link sidebar-page" aria-label="线程阻塞唤醒类LockSupport"><!---->线程阻塞唤醒类LockSupport<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/map.html" class="nav-link sidebar-link sidebar-page" aria-label="并发集合容器"><!---->并发集合容器<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ConcurrentHashMap.html" class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentHashMap"><!---->ConcurrentHashMap<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ConcurrentLinkedQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentLinkedQueue"><!---->ConcurrentLinkedQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CopyOnWriteArrayList.html" class="nav-link sidebar-link sidebar-page" aria-label="CopyOnWriteArrayList"><!---->CopyOnWriteArrayList<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ThreadLocal.html" class="nav-link sidebar-link sidebar-page" aria-label="ThreadLocal"><!---->ThreadLocal<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/BlockingQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="BlockingQueue"><!---->BlockingQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/pool.html" class="nav-link sidebar-link sidebar-page" aria-label="线程池"><!---->线程池<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ScheduledThreadPoolExecutor.html" class="nav-link sidebar-link sidebar-page" aria-label="计划任务"><!---->计划任务<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/atomic.html" class="nav-link sidebar-link sidebar-page" aria-label="原子操作类"><!---->原子操作类<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CountDownLatch.html" class="nav-link sidebar-link sidebar-page" aria-label="通信工具类CountDownLatch"><!---->通信工具类CountDownLatch<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/fork-join.html" class="nav-link sidebar-link sidebar-page" aria-label="Fork/Join框架"><!---->Fork/Join框架<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/shengchanzhe-xiaofeizhe.html" class="nav-link sidebar-link sidebar-page" aria-label="生产者-消费者模式"><!---->生产者-消费者模式<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java线程的6种状态及切换(透彻讲解)</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 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router-link-exact-active toc-link level2">操作系统中的线程状态转换</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/thread-state-and-method.html#java线程的6个状态" class="router-link-active router-link-exact-active toc-link level2">Java线程的6个状态</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/thread-state-and-method.html#new" class="router-link-active router-link-exact-active toc-link level3">NEW</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/thread-state-and-method.html#runnable" class="router-link-active router-link-exact-active toc-link level3">RUNNABLE</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/thread-state-and-method.html#blocked" class="router-link-active router-link-exact-active toc-link level3">BLOCKED</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/thread-state-and-method.html#waiting" class="router-link-active router-link-exact-active toc-link level3">WAITING</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/thread-state-and-method.html#timed-waiting" class="router-link-active router-link-exact-active toc-link level3">TIMED_WAITING</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/thread-state-and-method.html#terminated" class="router-link-active router-link-exact-active toc-link level3">TERMINATED</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/thread-state-and-method.html#线程状态的转换" class="router-link-active router-link-exact-active toc-link level2">线程状态的转换</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/thread-state-and-method.html#blocked与runnable状态的转换" class="router-link-active router-link-exact-active toc-link level3">BLOCKED与RUNNABLE状态的转换</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/thread-state-and-method.html#waiting状态与runnable状态的转换" class="router-link-active router-link-exact-active toc-link level3">WAITING状态与RUNNABLE状态的转换</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/thread-state-and-method.html#timed-waiting与runnable状态转换" class="router-link-active router-link-exact-active toc-link level3">TIMED_WAITING与RUNNABLE状态转换</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/thread-state-and-method.html#线程中断" class="router-link-active router-link-exact-active toc-link level3">线程中断</a></li><!----><!--]--></ul><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="java线程的6种状态及切换-透彻讲解" tabindex="-1"><a class="header-anchor" href="#java线程的6种状态及切换-透彻讲解" aria-hidden="true">#</a> Java线程的6种状态及切换(透彻讲解)</h1><h2 id="操作系统中的线程状态转换" tabindex="-1"><a class="header-anchor" href="#操作系统中的线程状态转换" aria-hidden="true">#</a> 操作系统中的线程状态转换</h2><p>首先我们来看看操作系统中的线程状态转换。</p><blockquote><p>在现在的操作系统中，线程是被视为轻量级进程的，所以<strong>操作系统线程的状态其实和操作系统进程的状态是一致的</strong>。</p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/thread-state-and-method-f60caaad-ad47-4edc-8d0a-ab736c2e8500.png" alt="系统进程/线程转换图"></p><p>操作系统线程主要有以下三个状态：</p><ul><li>就绪状态(ready)：线程正在等待使用CPU，经调度程序调用之后可进入running状态。</li><li>执行状态(running)：线程正在使用CPU。</li><li>等待状态(waiting): 线程经过等待事件的调用或者正在等待其他资源（如I/O）。</li></ul><h2 id="java线程的6个状态" tabindex="-1"><a class="header-anchor" href="#java线程的6个状态" aria-hidden="true">#</a> Java线程的6个状态</h2><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token comment">// Thread.State 源码</span>
 <span class="token keyword">public</span> <span class="token keyword">enum</span> <span class="token class-name">State</span> <span class="token punctuation">{</span>
     NEW<span class="token punctuation">,</span>
     RUNNABLE<span class="token punctuation">,</span>
@@ -164,6 +164,6 @@
     <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span>b<span class="token punctuation">.</span><span class="token function">getName</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">+</span> <span class="token string">&quot;:&quot;</span> <span class="token operator">+</span> b<span class="token punctuation">.</span><span class="token function">getState</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 <span class="token punctuation">}</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>这里调用a.join(1000L)，因为是指定了具体a线程执行的时间的，并且执行时间是小于a线程sleep的时间，所以a线程状态输出TIMED_WAITING。</p><p>b线程状态仍然不固定（RUNNABLE或BLOCKED）。</p><h3 id="线程中断" tabindex="-1"><a class="header-anchor" href="#线程中断" aria-hidden="true">#</a> 线程中断</h3><blockquote><p>在某些情况下，我们在线程启动后发现并不需要它继续执行下去时，需要中断线程。目前在Java里还没有安全直接的方法来停止线程，但是Java提供了线程中断机制来处理需要中断线程的情况。</p><p>线程中断机制是一种协作机制。需要注意，通过中断操作并不能直接终止一个线程，而是通知需要被中断的线程自行处理。</p></blockquote><p>简单介绍下Thread类里提供的关于线程中断的几个方法：</p><ul><li>Thread.interrupt()：中断线程。这里的中断线程并不会立即停止线程，而是设置线程的中断状态为true（默认是flase）；</li><li>Thread.currentThread().isInterrupted()：测试当前线程是否被中断。线程的中断状态受这个方法的影响，意思是调用一次使线程中断状态设置为true，连续调用两次会使得这个线程的中断状态重新转为false；</li><li>Thread.isInterrupted()：测试当前线程是否被中断。与上面方法不同的是调用这个方法并不会影响线程的中断状态。</li></ul><blockquote><p>在线程中断机制里，当其他线程通知需要被中断的线程后，线程中断的状态被设置为true，但是具体被要求中断的线程要怎么处理，完全由被中断线程自己而定，可以在合适的实际处理中断请求，也可以完全不处理继续执行下去。</p></blockquote><hr><blockquote><p>编辑：沉默王二，内容大部分来源以下三个开源仓库：</p><ul><li><a href="http://concurrent.redspider.group/" target="_blank" rel="noopener noreferrer">深入浅出 Java 多线程<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" 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class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java并发编程volatile关键字解析</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon 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href="/thread/volatile.html#重排序" class="router-link-active router-link-exact-active toc-link level3">重排序</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/volatile.html#happens-before规则" class="router-link-active router-link-exact-active toc-link level3">happens-before规则</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/volatile.html#volatile的内存语义" class="router-link-active router-link-exact-active toc-link level2">volatile的内存语义</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/volatile.html#内存可见性-1" class="router-link-active router-link-exact-active toc-link level3">内存可见性</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/volatile.html#禁止重排序" class="router-link-active router-link-exact-active toc-link level3">禁止重排序</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/volatile.html#volatile的用途" class="router-link-active router-link-exact-active toc-link level2">volatile的用途</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="java并发编程volatile关键字解析" tabindex="-1"><a class="header-anchor" href="#java并发编程volatile关键字解析" aria-hidden="true">#</a> Java并发编程volatile关键字解析</h1><h2 id="几个基本概念" tabindex="-1"><a class="header-anchor" href="#几个基本概念" aria-hidden="true">#</a> 几个基本概念</h2><p>在介绍volatile之前，我们先回顾及介绍几个基本的概念。</p><h3 id="内存可见性" tabindex="-1"><a class="header-anchor" href="#内存可见性" aria-hidden="true">#</a> 内存可见性</h3><p>在Java内存模型那一章我们介绍了JMM有一个主内存，每个线程有自己私有的工作内存，工作内存中保存了一些变量在主内存的拷贝。</p><p><strong>内存可见性，指的是线程之间的可见性，当一个线程修改了共享变量时，另一个线程可以读取到这个修改后的值</strong>。</p><h3 id="重排序" tabindex="-1"><a class="header-anchor" href="#重排序" aria-hidden="true">#</a> 重排序</h3><p>为优化程序性能，对原有的指令执行顺序进行优化重新排序。重排序可能发生在多个阶段，比如编译重排序、CPU重排序等。</p><h3 id="happens-before规则" tabindex="-1"><a class="header-anchor" href="#happens-before规则" aria-hidden="true">#</a> happens-before规则</h3><p>是一个给程序员使用的规则，只要程序员在写代码的时候遵循happens-before规则，JVM就能保证指令在多线程之间的顺序性符合程序员的预期。</p><h2 id="volatile的内存语义" tabindex="-1"><a class="header-anchor" href="#volatile的内存语义" aria-hidden="true">#</a> volatile的内存语义</h2><p>在Java中，volatile关键字有特殊的内存语义。volatile主要有以下两个功能：</p><ul><li>保证变量的<strong>内存可见性</strong></li><li>禁止volatile变量与普通变量<strong>重排序</strong>（JSR133提出，Java 5 开始才有这个“增强的volatile内存语义”）</li></ul><h3 id="内存可见性-1" tabindex="-1"><a class="header-anchor" href="#内存可见性-1" aria-hidden="true">#</a> 内存可见性</h3><p>以一段示例代码开始：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">VolatileExample</span> <span class="token punctuation">{</span>
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class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/cas.html" class="nav-link sidebar-link sidebar-page" aria-label="CAS的原理"><!---->CAS的原理<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/aqs.html" class="nav-link sidebar-link sidebar-page" aria-label="AQS详解"><!---->AQS详解<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/lock.html" class="nav-link sidebar-link sidebar-page" aria-label="锁"><!---->锁<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/reentrantLock.html" class="nav-link sidebar-link sidebar-page" aria-label="重入锁ReentrantLock"><!---->重入锁ReentrantLock<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ReentrantReadWriteLock.html" class="nav-link sidebar-link sidebar-page" aria-label="读写锁ReentrantReadWriteLock"><!---->读写锁ReentrantReadWriteLock<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/condition.html" class="nav-link sidebar-link sidebar-page" aria-label="线程协作类Condition"><!---->线程协作类Condition<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/LockSupport.html" class="nav-link sidebar-link sidebar-page" aria-label="线程阻塞唤醒类LockSupport"><!---->线程阻塞唤醒类LockSupport<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/map.html" class="nav-link sidebar-link sidebar-page" aria-label="并发集合容器"><!---->并发集合容器<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ConcurrentHashMap.html" class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentHashMap"><!---->ConcurrentHashMap<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ConcurrentLinkedQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentLinkedQueue"><!---->ConcurrentLinkedQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CopyOnWriteArrayList.html" class="nav-link sidebar-link sidebar-page" aria-label="CopyOnWriteArrayList"><!---->CopyOnWriteArrayList<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ThreadLocal.html" class="nav-link sidebar-link sidebar-page" aria-label="ThreadLocal"><!---->ThreadLocal<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/BlockingQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="BlockingQueue"><!---->BlockingQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/pool.html" class="nav-link sidebar-link sidebar-page" aria-label="线程池"><!---->线程池<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ScheduledThreadPoolExecutor.html" class="nav-link sidebar-link sidebar-page" aria-label="计划任务"><!---->计划任务<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/atomic.html" class="nav-link sidebar-link sidebar-page" aria-label="原子操作类"><!---->原子操作类<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CountDownLatch.html" class="nav-link sidebar-link sidebar-page" aria-label="通信工具类CountDownLatch"><!---->通信工具类CountDownLatch<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/fork-join.html" class="nav-link sidebar-link sidebar-page" aria-label="Fork/Join框架"><!---->Fork/Join框架<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/shengchanzhe-xiaofeizhe.html" class="nav-link sidebar-link sidebar-page" aria-label="生产者-消费者模式"><!---->生产者-消费者模式<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java并发编程volatile关键字解析</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 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8 分钟</span><meta property="timeRequired" content="PT8M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/volatile.html#几个基本概念" class="router-link-active router-link-exact-active toc-link level2">几个基本概念</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/volatile.html#内存可见性" class="router-link-active router-link-exact-active toc-link level3">内存可见性</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/volatile.html#重排序" class="router-link-active router-link-exact-active toc-link level3">重排序</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/volatile.html#happens-before规则" class="router-link-active router-link-exact-active toc-link level3">happens-before规则</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/volatile.html#volatile的内存语义" class="router-link-active router-link-exact-active toc-link level2">volatile的内存语义</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/volatile.html#内存可见性-1" class="router-link-active router-link-exact-active toc-link level3">内存可见性</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/volatile.html#禁止重排序" class="router-link-active router-link-exact-active toc-link level3">禁止重排序</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/volatile.html#volatile的用途" class="router-link-active router-link-exact-active toc-link level2">volatile的用途</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="java并发编程volatile关键字解析" tabindex="-1"><a class="header-anchor" href="#java并发编程volatile关键字解析" aria-hidden="true">#</a> Java并发编程volatile关键字解析</h1><h2 id="几个基本概念" tabindex="-1"><a class="header-anchor" href="#几个基本概念" aria-hidden="true">#</a> 几个基本概念</h2><p>在介绍volatile之前，我们先回顾及介绍几个基本的概念。</p><h3 id="内存可见性" tabindex="-1"><a class="header-anchor" href="#内存可见性" aria-hidden="true">#</a> 内存可见性</h3><p>在Java内存模型那一章我们介绍了JMM有一个主内存，每个线程有自己私有的工作内存，工作内存中保存了一些变量在主内存的拷贝。</p><p><strong>内存可见性，指的是线程之间的可见性，当一个线程修改了共享变量时，另一个线程可以读取到这个修改后的值</strong>。</p><h3 id="重排序" tabindex="-1"><a class="header-anchor" href="#重排序" aria-hidden="true">#</a> 重排序</h3><p>为优化程序性能，对原有的指令执行顺序进行优化重新排序。重排序可能发生在多个阶段，比如编译重排序、CPU重排序等。</p><h3 id="happens-before规则" tabindex="-1"><a class="header-anchor" href="#happens-before规则" aria-hidden="true">#</a> happens-before规则</h3><p>是一个给程序员使用的规则，只要程序员在写代码的时候遵循happens-before规则，JVM就能保证指令在多线程之间的顺序性符合程序员的预期。</p><h2 id="volatile的内存语义" tabindex="-1"><a class="header-anchor" href="#volatile的内存语义" aria-hidden="true">#</a> volatile的内存语义</h2><p>在Java中，volatile关键字有特殊的内存语义。volatile主要有以下两个功能：</p><ul><li>保证变量的<strong>内存可见性</strong></li><li>禁止volatile变量与普通变量<strong>重排序</strong>（JSR133提出，Java 5 开始才有这个“增强的volatile内存语义”）</li></ul><h3 id="内存可见性-1" tabindex="-1"><a class="header-anchor" href="#内存可见性-1" aria-hidden="true">#</a> 内存可见性</h3><p>以一段示例代码开始：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">VolatileExample</span> <span class="token punctuation">{</span>
     <span class="token keyword">int</span> a <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span>
     <span class="token keyword">volatile</span> <span class="token keyword">boolean</span> flag <span class="token operator">=</span> <span class="token boolean">false</span><span class="token punctuation">;</span>
     
@@ -92,6 +92,6 @@
 <span class="token number">3</span> s<span class="token operator">=</span>memory <span class="token comment">//设置s指向刚分配的地址</span>
 <span class="token number">2</span> <span class="token function">ctorInstanc</span><span class="token punctuation">(</span>memory<span class="token punctuation">)</span> <span class="token comment">//初始化对象</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>而一旦假设发生了这样的重排序，比如线程A在第10行执行了步骤1和步骤3，但是步骤2还没有执行完。这个时候另一个线程B执行到了第7行，它会判定instance不为空，然后直接返回了一个未初始化完成的instance！</p><p>所以JSR-133对volatile做了增强后，volatile的禁止重排序功能还是非常有用的。</p><hr><blockquote><p>编辑：沉默王二，内容大部分来源以下三个开源仓库：</p><ul><li><a href="http://concurrent.redspider.group/" target="_blank" rel="noopener noreferrer">深入浅出 Java 多线程<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" 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aria-label="一、前言"><!---->一、前言<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">二、Java核心</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.1 Java概述</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.2 Java基础语法</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.3 面向对象编程</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.4 字符串&amp;数组</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.5 集合框架（容器）</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.6 IO</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.7 异常处理</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.8 常用工具类</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.9 Java新特性</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.10 Java重要知识点</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">2.11 并发编程</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a aria-current="page" href="/thread/wangzhe-thread.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="创建Java线程的3种方式"><!---->创建Java线程的3种方式<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/thread-state-and-method.html" class="nav-link sidebar-link sidebar-page" aria-label="线程的6种状态及切换"><!---->线程的6种状态及切换<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/thread-group-and-thread-priority.html" class="nav-link sidebar-link sidebar-page" aria-label="线程组和线程优先级"><!---->线程组和线程优先级<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/why-need-thread.html" class="nav-link sidebar-link sidebar-page" aria-label="进程与线程的区别"><!---->进程与线程的区别<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/thread-bring-some-problem.html" class="nav-link sidebar-link sidebar-page" aria-label="并发编程带来了哪些问题"><!---->并发编程带来了哪些问题<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/jmm.html" class="nav-link sidebar-link sidebar-page" aria-label="Java内存模型"><!---->Java内存模型<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/volatile.html" class="nav-link sidebar-link sidebar-page" aria-label="volatile"><!---->volatile<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/synchronized.html" class="nav-link sidebar-link sidebar-page" aria-label="synchronized"><!---->synchronized<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/cas.html" class="nav-link sidebar-link sidebar-page" aria-label="CAS的原理"><!---->CAS的原理<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/aqs.html" class="nav-link sidebar-link sidebar-page" aria-label="AQS详解"><!---->AQS详解<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/lock.html" class="nav-link sidebar-link sidebar-page" aria-label="锁"><!---->锁<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/reentrantLock.html" class="nav-link sidebar-link sidebar-page" aria-label="重入锁ReentrantLock"><!---->重入锁ReentrantLock<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ReentrantReadWriteLock.html" class="nav-link sidebar-link sidebar-page" aria-label="读写锁ReentrantReadWriteLock"><!---->读写锁ReentrantReadWriteLock<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/condition.html" class="nav-link sidebar-link sidebar-page" aria-label="线程协作类Condition"><!---->线程协作类Condition<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/LockSupport.html" class="nav-link sidebar-link sidebar-page" aria-label="线程阻塞唤醒类LockSupport"><!---->线程阻塞唤醒类LockSupport<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/map.html" class="nav-link sidebar-link sidebar-page" aria-label="并发集合容器"><!---->并发集合容器<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ConcurrentHashMap.html" class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentHashMap"><!---->ConcurrentHashMap<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ConcurrentLinkedQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentLinkedQueue"><!---->ConcurrentLinkedQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CopyOnWriteArrayList.html" class="nav-link sidebar-link sidebar-page" aria-label="CopyOnWriteArrayList"><!---->CopyOnWriteArrayList<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ThreadLocal.html" class="nav-link sidebar-link sidebar-page" aria-label="ThreadLocal"><!---->ThreadLocal<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/BlockingQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="BlockingQueue"><!---->BlockingQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/pool.html" class="nav-link sidebar-link sidebar-page" aria-label="线程池"><!---->线程池<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ScheduledThreadPoolExecutor.html" class="nav-link sidebar-link sidebar-page" aria-label="计划任务"><!---->计划任务<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/atomic.html" class="nav-link sidebar-link sidebar-page" aria-label="原子操作类"><!---->原子操作类<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CountDownLatch.html" class="nav-link sidebar-link sidebar-page" aria-label="通信工具类CountDownLatch"><!---->通信工具类CountDownLatch<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/fork-join.html" class="nav-link sidebar-link sidebar-page" aria-label="Fork/Join框架"><!---->Fork/Join框架<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/shengchanzhe-xiaofeizhe.html" class="nav-link sidebar-link sidebar-page" aria-label="生产者-消费者模式"><!---->生产者-消费者模式<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->室友打了一把王者就学会了创建Java线程的3种方式</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 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15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 5 分钟</span><meta property="timeRequired" content="PT5M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="室友打了一把王者就学会了创建java线程的3种方式" tabindex="-1"><a class="header-anchor" href="#室友打了一把王者就学会了创建java线程的3种方式" aria-hidden="true">#</a> 室友打了一把王者就学会了创建Java线程的3种方式</h1><p>对于 Java 初学者来说，多线程的很多概念听起来就很难理解。比方说：</p><ul><li>进程，是对运行时程序的封装，是系统进行资源调度和分配的基本单位，实现了操作系统的并发。</li><li>线程，是进程的子任务，是CPU调度和分派的基本单位，实现了进程内部的并发。</li></ul><p>很抽象，对不对？打个比喻，你在打一把王者（其实我不会玩哈doge）：</p><ul><li>进程可以比作是你开的这一把游戏</li><li>线程可以比作是你所选的英雄或者是游戏中的水晶野怪等之类的。</li></ul><p>带着这个比喻来理解进程和线程的一些关系，一个进程可以有多个线程就叫多线程。是不是感觉非常好理解了？</p><p><strong>❤1、线程在进程下进行</strong></p><p>(单独的英雄角色、野怪、小兵肯定不能运行)</p><p><strong>❤2、进程之间不会相互影响，主线程结束将会导致整个进程结束</strong></p><p>(两把游戏之间不会有联系和影响。你的水晶被推掉，你这把游戏就结束了)</p><p><strong>❤3、不同的进程数据很难共享</strong></p><p>(两把游戏之间很难有联系，有联系的情况比如上把的敌人这把又匹配到了)</p><p><strong>❤4、同进程下的不同线程之间数据很容易共享</strong></p><p>(你开的那一把游戏，你可以看到每个玩家的状态——生死，也可以看到每个玩家的出装等等）</p><p><strong>❤5、进程使用内存地址可以限定使用量</strong></p><p>(开的房间模式，决定了你可以设置有多少人进，当房间满了后，其他人就进不去了，除非有人退出房间，其他人才能进)</p><p>搞清楚上面这些概念之后，我们来看一下多线程创建的两种方式：</p><p>♠①：创建一个类继承Thread类，并重写run方法。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">MyThread</span> <span class="token keyword">extends</span> <span class="token class-name">Thread</span> <span class="token punctuation">{</span>
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class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/LockSupport.html" class="nav-link sidebar-link sidebar-page" aria-label="线程阻塞唤醒类LockSupport"><!---->线程阻塞唤醒类LockSupport<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/map.html" class="nav-link sidebar-link sidebar-page" aria-label="并发集合容器"><!---->并发集合容器<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ConcurrentHashMap.html" class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentHashMap"><!---->ConcurrentHashMap<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ConcurrentLinkedQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentLinkedQueue"><!---->ConcurrentLinkedQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CopyOnWriteArrayList.html" class="nav-link sidebar-link sidebar-page" aria-label="CopyOnWriteArrayList"><!---->CopyOnWriteArrayList<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ThreadLocal.html" class="nav-link sidebar-link sidebar-page" aria-label="ThreadLocal"><!---->ThreadLocal<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/BlockingQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="BlockingQueue"><!---->BlockingQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/pool.html" class="nav-link sidebar-link sidebar-page" aria-label="线程池"><!---->线程池<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ScheduledThreadPoolExecutor.html" class="nav-link sidebar-link sidebar-page" aria-label="计划任务"><!---->计划任务<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/atomic.html" class="nav-link sidebar-link sidebar-page" aria-label="原子操作类"><!---->原子操作类<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CountDownLatch.html" class="nav-link sidebar-link sidebar-page" aria-label="通信工具类CountDownLatch"><!---->通信工具类CountDownLatch<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/fork-join.html" class="nav-link sidebar-link sidebar-page" aria-label="Fork/Join框架"><!---->Fork/Join框架<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/shengchanzhe-xiaofeizhe.html" class="nav-link sidebar-link sidebar-page" aria-label="生产者-消费者模式"><!---->生产者-消费者模式<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->室友打了一把王者就学会了创建Java线程的3种方式</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2021年12月16日</span><meta property="datePublished" content="2021-12-16T03:36:50.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><li class="category category6" role>并发编程</li><meta property="articleSection" content="Java核心,并发编程"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg 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7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 5 分钟</span><meta property="timeRequired" content="PT5M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="室友打了一把王者就学会了创建java线程的3种方式" tabindex="-1"><a class="header-anchor" href="#室友打了一把王者就学会了创建java线程的3种方式" aria-hidden="true">#</a> 室友打了一把王者就学会了创建Java线程的3种方式</h1><p>对于 Java 初学者来说，多线程的很多概念听起来就很难理解。比方说：</p><ul><li>进程，是对运行时程序的封装，是系统进行资源调度和分配的基本单位，实现了操作系统的并发。</li><li>线程，是进程的子任务，是CPU调度和分派的基本单位，实现了进程内部的并发。</li></ul><p>很抽象，对不对？打个比喻，你在打一把王者（其实我不会玩哈doge）：</p><ul><li>进程可以比作是你开的这一把游戏</li><li>线程可以比作是你所选的英雄或者是游戏中的水晶野怪等之类的。</li></ul><p>带着这个比喻来理解进程和线程的一些关系，一个进程可以有多个线程就叫多线程。是不是感觉非常好理解了？</p><p><strong>❤1、线程在进程下进行</strong></p><p>(单独的英雄角色、野怪、小兵肯定不能运行)</p><p><strong>❤2、进程之间不会相互影响，主线程结束将会导致整个进程结束</strong></p><p>(两把游戏之间不会有联系和影响。你的水晶被推掉，你这把游戏就结束了)</p><p><strong>❤3、不同的进程数据很难共享</strong></p><p>(两把游戏之间很难有联系，有联系的情况比如上把的敌人这把又匹配到了)</p><p><strong>❤4、同进程下的不同线程之间数据很容易共享</strong></p><p>(你开的那一把游戏，你可以看到每个玩家的状态——生死，也可以看到每个玩家的出装等等）</p><p><strong>❤5、进程使用内存地址可以限定使用量</strong></p><p>(开的房间模式，决定了你可以设置有多少人进，当房间满了后，其他人就进不去了，除非有人退出房间，其他人才能进)</p><p>搞清楚上面这些概念之后，我们来看一下多线程创建的两种方式：</p><p>♠①：创建一个类继承Thread类，并重写run方法。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">MyThread</span> <span class="token keyword">extends</span> <span class="token class-name">Thread</span> <span class="token punctuation">{</span>
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     <span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">run</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
         <span class="token keyword">for</span> <span class="token punctuation">(</span><span class="token keyword">int</span> i <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span> i <span class="token operator">&lt;</span> <span class="token number">100</span><span class="token punctuation">;</span> i<span class="token operator">++</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
@@ -120,6 +120,6 @@ t1<span class="token punctuation">.</span><span class="token function">start</sp
 t2<span class="token punctuation">.</span><span class="token function">start</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 t3<span class="token punctuation">.</span><span class="token function">start</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>如果其他线程都执行完毕，main 方法（主线程）也执行完毕，JVM 就会退出，也就是停止运行。如果 JVM 都停止运行了，守护线程自然也就停止了。</p><p>最后再来看一下线程的生命周期吧，一图胜千言。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/thread/wangzhe-thread-04.png" alt=""></p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png"></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/thread/wangzhe-thread.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item update-time"><span class="label">上次编辑于: </span><span class="info">2022/5/12 下午4:24:21</span></div><div class="meta-item contributors"><span class="label">贡献者: </span><!--[--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">itwanger</span>,<!--]--><!--[--><span class="contributor" title="email: www.qing_gee@163.com">沉默王二</span><!--]--><!--]--></div></footer><nav class="page-nav"><!----><a href="/thread/thread-state-and-method.html" class="nav-link next" aria-label="线程的6种状态及切换"><div class="hint">下一页<span class="arrow right"></span></div><div class="link">线程的6种状态及切换<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="footer-wrapper"><div class="footer"><a href="https://beian.miit.gov.cn/" target="_blank">豫ICP备2021038026号-1</a><img src="https://cdn.tobebetterjavaer.com/tobebetterjavaer/images/beian.png" height="15px" width="15px" /><a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=41030502000411"><span>豫公网安备 41030502000411号</span></a></div><div class="copyright">Copyright © 2022 沉默王二</div></footer><!--]--></div><!--]--><!----><!----><!--]--></div>
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sidebar-link sidebar-page" aria-label="ConcurrentLinkedQueue"><!---->ConcurrentLinkedQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CopyOnWriteArrayList.html" class="nav-link sidebar-link sidebar-page" aria-label="CopyOnWriteArrayList"><!---->CopyOnWriteArrayList<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ThreadLocal.html" class="nav-link sidebar-link sidebar-page" aria-label="ThreadLocal"><!---->ThreadLocal<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/BlockingQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="BlockingQueue"><!---->BlockingQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/pool.html" class="nav-link sidebar-link sidebar-page" aria-label="线程池"><!---->线程池<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ScheduledThreadPoolExecutor.html" class="nav-link sidebar-link sidebar-page" aria-label="计划任务"><!---->计划任务<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/atomic.html" class="nav-link sidebar-link sidebar-page" aria-label="原子操作类"><!---->原子操作类<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CountDownLatch.html" class="nav-link sidebar-link sidebar-page" aria-label="通信工具类CountDownLatch"><!---->通信工具类CountDownLatch<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/fork-join.html" class="nav-link sidebar-link sidebar-page" aria-label="Fork/Join框架"><!---->Fork/Join框架<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/shengchanzhe-xiaofeizhe.html" class="nav-link sidebar-link sidebar-page" aria-label="生产者-消费者模式"><!---->生产者-消费者模式<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->进程与线程的区别是什么？</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 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9 分钟</span><meta property="timeRequired" content="PT9M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/why-need-thread.html#进程的产生" class="router-link-active router-link-exact-active toc-link level2">进程的产生</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/why-need-thread.html#线程的提出" class="router-link-active router-link-exact-active toc-link level2">线程的提出</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/why-need-thread.html#线程带来的好处" class="router-link-active router-link-exact-active toc-link level2">线程带来的好处</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="进程与线程的区别是什么" tabindex="-1"><a class="header-anchor" href="#进程与线程的区别是什么" aria-hidden="true">#</a> 进程与线程的区别是什么？</h1><h2 id="进程的产生" tabindex="-1"><a class="header-anchor" href="#进程的产生" aria-hidden="true">#</a> 进程的产生</h2><p>最初的计算机只能接受一些特定的指令，用户每输入一个指令，计算机就做出一个操作。当用户在思考或者输入时，计算机就在等待。这样效率非常低下，在很多时候，计算机都处在等待状态。</p><p><strong>批处理操作系统</strong></p><p>后来有了<strong>批处理操作系统</strong>,把一系列需要操作的指令写下来，形成一个清单，一次性交给计算机。用户将多个需要执行的程序写在磁带上，然后交由计算机去读取并逐个执行这些程序，并将输出结果写在另一个磁带上。</p><p>批处理操作系统在一定程度上提高了计算机的效率，但是由于<strong>批处理操作系统的指令运行方式仍然是串行的，内存中始终只有一个程序在运行</strong>，后面的程序需要等待前面的程序执行完成后才能开始执行，而前面的程序有时会由于I/O操作、网络等原因阻塞，所以<strong>批处理操作效率也不高</strong>。</p><p><strong>进程的提出</strong></p><p>人们对于计算机的性能要求越来越高，现有的批处理操作系统并不能满足人们的需求，而批处理操作系统的瓶颈在于内存中只存在一个程序，那么内存中能不能存在多个程序呢？这是人们亟待解决的问题。</p><p>于是，科学家们提出了进程的概念。</p><p>进程就是<strong>应用程序在内存中分配的空间，也就是正在运行的程序</strong>，各个进程之间互不干扰。同时进程保存着程序每一个时刻运行的状态。</p><blockquote><p>程序：用某种编程语言(java、python等)编写，能够完成一定任务或者功能的代码集合,是指令和数据的有序集合，是<strong>一段静态代码</strong>。</p></blockquote><p>此时，CPU采用时间片轮转的方式运行进程：CPU为每个进程分配一个时间段，称作它的时间片。如果在时间片结束时进程还在运行，则暂停这个进程的运行，并且CPU分配给另一个进程（这个过程叫做上下文切换）。如果进程在时间片结束前阻塞或结束，则CPU立即进行切换，不用等待时间片用完。</p><blockquote><p>当进程暂停时，它会保存当前进程的状态（进程标识，进程使用的资源等），在下一次切换回来时根据之前保存的状态进行恢复，接着继续执行。</p></blockquote><p>使用进程+CPU时间片轮转方式的操作系统，在宏观上看起来同一时间段执行多个任务，换句话说，<strong>进程让操作系统的并发成为了可能</strong>。虽然并发从宏观上看有多个任务在执行，但在事实上，对于<strong>单核CPU</strong>来说，任意具体时刻都只有一个任务在占用CPU资源。</p><p><strong>对操作系统的要求进一步提高</strong></p><p>虽然进程的出现，使得操作系统的性能大大提升，但是随着时间的推移，人们并不满足一个进程在一段时间只能做一件事情，如果一个进程有多个子任务时，只能逐个得执行这些子任务，很影响效率。</p><blockquote><p>比如杀毒软件在检测用户电脑时，如果在某一项检测中卡住了，那么后面的检测项也会受到影响。或者说当你使用杀毒软件中的扫描病毒功能时，在扫描病毒结束之前，无法使用杀毒软件中清理垃圾的功能，这显然无法满足人们的要求。</p></blockquote><h2 id="线程的提出" tabindex="-1"><a class="header-anchor" href="#线程的提出" aria-hidden="true">#</a> 线程的提出</h2><p>那么能不能让这些子任务同时执行呢？于是人们又提出了线程的概念，<strong>让一个线程执行一个子任务，这样一个进程就包含了多个线程，每个线程负责一个单独的子任务。</strong></p><blockquote><p>使用线程之后，事情就变得简单多了。当用户使用扫描病毒功能时，就让扫描病毒这个线程去执行。同时，如果用户又使用清理垃圾功能，那么可以先暂停扫描病毒线程，先响应用户的清理垃圾的操作，让清理垃圾这个线程去执行。响应完后再切换回来，接着执行扫描病毒线程。</p><p>注意：操作系统是如何分配时间片给每一个线程的，涉及到线程的调度策略，有兴趣的同学可以看一下《操作系统》，本文不做深入详解。</p></blockquote><p>总之，进程和线程的提出极大的提高了操作系统的性能。<strong>进程让操作系统的并发性成为了可能，而线程让进程的内部并发成为了可能。</strong></p><p><strong>多进程的方式也可以实现并发，为什么我们要使用多线程？</strong></p><p>多进程方式确实可以实现并发，但使用多线程，有以下几个好处：</p><ul><li>进程间的通信比较复杂，而线程间的通信比较简单，通常情况下，我们需要使用共享资源，这些资源在线程间的通信比较容易。</li><li>进程是重量级的，而线程是轻量级的，故多线程方式的系统开销更小。</li></ul><p><strong>进程和线程的区别</strong></p><p>进程是一个独立的运行环境，而线程是在进程中执行的一个任务。他们两个本质的区别是<strong>是否单独占有内存地址空间及其它系统资源（比如I/O）</strong>：</p><ul><li><p>进程单独占有一定的内存地址空间，所以进程间存在内存隔离，数据是分开的，数据共享复杂但是同步简单，各个进程之间互不干扰；而线程共享所属进程占有的内存地址空间和资源，数据共享简单，但是同步复杂。</p></li><li><p>进程单独占有一定的内存地址空间，一个进程出现问题不会影响其他进程，不影响主程序的稳定性，可靠性高；一个线程崩溃可能影响整个程序的稳定性，可靠性较低。</p></li><li><p>进程单独占有一定的内存地址空间，进程的创建和销毁不仅需要保存寄存器和栈信息，还需要资源的分配回收以及页调度，开销较大；线程只需要保存寄存器和栈信息，开销较小。</p></li></ul><p>另外一个重要区别是，<strong>进程是操作系统进行资源分配的基本单位，而线程是操作系统进行调度的基本单位</strong>，即CPU分配时间的单位 。</p><h2 id="线程带来的好处" tabindex="-1"><a class="header-anchor" href="#线程带来的好处" aria-hidden="true">#</a> 线程带来的好处</h2><p>一直以来，硬件的发展极其迅速，也有一个很著名的&quot;摩尔定律&quot;，可能会奇怪明明讨论的是并发编程为什么会扯到了硬件的发展，这其中的关系应该是多核CPU的发展为并发编程提供的硬件基础。</p><p>摩尔定律并不是一种自然法则或者是物理定律，它只是基于认为观测数据后，对未来的一种预测。按照所预测的速度，我们的计算能力会按照指数级别的速度增长，不久以后会拥有超强的计算能力，正是在畅想未来的时候，2004年，Intel宣布4GHz芯片的计划推迟到2005年，然后在2004年秋季，Intel宣布彻底取消4GHz的计划，也就是说摩尔定律的有效性超过了半个世纪戛然而止。但是，聪明的硬件工程师并没有停止研发的脚步，他们为了进一步提升计算速度，而不是再追求单独的计算单元，而是将多个计算单元整合到了一起，也就是形成了多核CPU。</p><p>短短十几年的时间，家用型CPU,比如Intel i7就可以达到4核心甚至8核心。而专业服务器则通常可以达到几个独立的CPU，每一个CPU甚至拥有多达8个以上的内核。因此，摩尔定律似乎在CPU核心扩展上继续得到体验。因此，多核的CPU的背景下，催生了并发编程的趋势，通过<strong>并发编程的形式可以将多核CPU的计算能力发挥到极致，性能得到提升</strong>。</p><p>顶级计算机科学家Donald Ervin Knuth如此评价这种情况：在我看来，这种现象（并发）或多或少是由于硬件设计者无计可施了导致的，他们将摩尔定律的责任推给了软件开发者。</p><p>另外，在特殊的业务场景下先天的就适合于并发编程。比如在图像处理领域，一张1024X768像素的图片，包含达到78万6千多个像素。即时将所有的像素遍历一边都需要很长的时间，面对如此复杂的计算量就需要充分利用多核的计算的能力。又比如当我们在网上购物时，为了提升响应速度，需要拆分，减库存，生成订单等等这些操作，就可以进行拆分利用多线程的技术完成。<strong>面对复杂业务模型，并行程序会比串行程序更适应业务需求，而并发编程更能吻合这种业务拆分</strong> 。正是因为这些优点，使得多线程技术能够得到重视，也是一名CS学习者应该掌握的：</p><ul><li>充分利用多核CPU的计算能力；</li><li>方便进行业务拆分，提升应用性能</li></ul><hr><blockquote><p>编辑：沉默王二，内容大部分来源以下三个开源仓库：</p><ul><li><a href="http://concurrent.redspider.group/" target="_blank" rel="noopener noreferrer">深入浅出 Java 多线程<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 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aria-label="线程阻塞唤醒类LockSupport"><!---->线程阻塞唤醒类LockSupport<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/map.html" class="nav-link sidebar-link sidebar-page" aria-label="并发集合容器"><!---->并发集合容器<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ConcurrentHashMap.html" class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentHashMap"><!---->ConcurrentHashMap<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ConcurrentLinkedQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="ConcurrentLinkedQueue"><!---->ConcurrentLinkedQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CopyOnWriteArrayList.html" class="nav-link sidebar-link sidebar-page" aria-label="CopyOnWriteArrayList"><!---->CopyOnWriteArrayList<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ThreadLocal.html" class="nav-link sidebar-link sidebar-page" aria-label="ThreadLocal"><!---->ThreadLocal<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/BlockingQueue.html" class="nav-link sidebar-link sidebar-page" aria-label="BlockingQueue"><!---->BlockingQueue<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/pool.html" class="nav-link sidebar-link sidebar-page" aria-label="线程池"><!---->线程池<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/ScheduledThreadPoolExecutor.html" class="nav-link sidebar-link sidebar-page" aria-label="计划任务"><!---->计划任务<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/atomic.html" class="nav-link sidebar-link sidebar-page" aria-label="原子操作类"><!---->原子操作类<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/CountDownLatch.html" class="nav-link sidebar-link sidebar-page" aria-label="通信工具类CountDownLatch"><!---->通信工具类CountDownLatch<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/fork-join.html" class="nav-link sidebar-link sidebar-page" aria-label="Fork/Join框架"><!---->Fork/Join框架<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/thread/shengchanzhe-xiaofeizhe.html" class="nav-link sidebar-link sidebar-page" aria-label="生产者-消费者模式"><!---->生产者-消费者模式<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">2.12 JVM</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">三、Java企业级开发</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->进程与线程的区别是什么？</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 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0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>Java核心</li><li class="category category6" role>并发编程</li><meta property="articleSection" content="Java核心,并发编程"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 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392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 9 分钟</span><meta property="timeRequired" content="PT9M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/thread/why-need-thread.html#进程的产生" class="router-link-active router-link-exact-active toc-link level2">进程的产生</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/why-need-thread.html#线程的提出" class="router-link-active router-link-exact-active toc-link level2">线程的提出</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/thread/why-need-thread.html#线程带来的好处" class="router-link-active router-link-exact-active toc-link level2">线程带来的好处</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="进程与线程的区别是什么" tabindex="-1"><a class="header-anchor" href="#进程与线程的区别是什么" aria-hidden="true">#</a> 进程与线程的区别是什么？</h1><h2 id="进程的产生" tabindex="-1"><a class="header-anchor" href="#进程的产生" aria-hidden="true">#</a> 进程的产生</h2><p>最初的计算机只能接受一些特定的指令，用户每输入一个指令，计算机就做出一个操作。当用户在思考或者输入时，计算机就在等待。这样效率非常低下，在很多时候，计算机都处在等待状态。</p><p><strong>批处理操作系统</strong></p><p>后来有了<strong>批处理操作系统</strong>,把一系列需要操作的指令写下来，形成一个清单，一次性交给计算机。用户将多个需要执行的程序写在磁带上，然后交由计算机去读取并逐个执行这些程序，并将输出结果写在另一个磁带上。</p><p>批处理操作系统在一定程度上提高了计算机的效率，但是由于<strong>批处理操作系统的指令运行方式仍然是串行的，内存中始终只有一个程序在运行</strong>，后面的程序需要等待前面的程序执行完成后才能开始执行，而前面的程序有时会由于I/O操作、网络等原因阻塞，所以<strong>批处理操作效率也不高</strong>。</p><p><strong>进程的提出</strong></p><p>人们对于计算机的性能要求越来越高，现有的批处理操作系统并不能满足人们的需求，而批处理操作系统的瓶颈在于内存中只存在一个程序，那么内存中能不能存在多个程序呢？这是人们亟待解决的问题。</p><p>于是，科学家们提出了进程的概念。</p><p>进程就是<strong>应用程序在内存中分配的空间，也就是正在运行的程序</strong>，各个进程之间互不干扰。同时进程保存着程序每一个时刻运行的状态。</p><blockquote><p>程序：用某种编程语言(java、python等)编写，能够完成一定任务或者功能的代码集合,是指令和数据的有序集合，是<strong>一段静态代码</strong>。</p></blockquote><p>此时，CPU采用时间片轮转的方式运行进程：CPU为每个进程分配一个时间段，称作它的时间片。如果在时间片结束时进程还在运行，则暂停这个进程的运行，并且CPU分配给另一个进程（这个过程叫做上下文切换）。如果进程在时间片结束前阻塞或结束，则CPU立即进行切换，不用等待时间片用完。</p><blockquote><p>当进程暂停时，它会保存当前进程的状态（进程标识，进程使用的资源等），在下一次切换回来时根据之前保存的状态进行恢复，接着继续执行。</p></blockquote><p>使用进程+CPU时间片轮转方式的操作系统，在宏观上看起来同一时间段执行多个任务，换句话说，<strong>进程让操作系统的并发成为了可能</strong>。虽然并发从宏观上看有多个任务在执行，但在事实上，对于<strong>单核CPU</strong>来说，任意具体时刻都只有一个任务在占用CPU资源。</p><p><strong>对操作系统的要求进一步提高</strong></p><p>虽然进程的出现，使得操作系统的性能大大提升，但是随着时间的推移，人们并不满足一个进程在一段时间只能做一件事情，如果一个进程有多个子任务时，只能逐个得执行这些子任务，很影响效率。</p><blockquote><p>比如杀毒软件在检测用户电脑时，如果在某一项检测中卡住了，那么后面的检测项也会受到影响。或者说当你使用杀毒软件中的扫描病毒功能时，在扫描病毒结束之前，无法使用杀毒软件中清理垃圾的功能，这显然无法满足人们的要求。</p></blockquote><h2 id="线程的提出" tabindex="-1"><a class="header-anchor" href="#线程的提出" aria-hidden="true">#</a> 线程的提出</h2><p>那么能不能让这些子任务同时执行呢？于是人们又提出了线程的概念，<strong>让一个线程执行一个子任务，这样一个进程就包含了多个线程，每个线程负责一个单独的子任务。</strong></p><blockquote><p>使用线程之后，事情就变得简单多了。当用户使用扫描病毒功能时，就让扫描病毒这个线程去执行。同时，如果用户又使用清理垃圾功能，那么可以先暂停扫描病毒线程，先响应用户的清理垃圾的操作，让清理垃圾这个线程去执行。响应完后再切换回来，接着执行扫描病毒线程。</p><p>注意：操作系统是如何分配时间片给每一个线程的，涉及到线程的调度策略，有兴趣的同学可以看一下《操作系统》，本文不做深入详解。</p></blockquote><p>总之，进程和线程的提出极大的提高了操作系统的性能。<strong>进程让操作系统的并发性成为了可能，而线程让进程的内部并发成为了可能。</strong></p><p><strong>多进程的方式也可以实现并发，为什么我们要使用多线程？</strong></p><p>多进程方式确实可以实现并发，但使用多线程，有以下几个好处：</p><ul><li>进程间的通信比较复杂，而线程间的通信比较简单，通常情况下，我们需要使用共享资源，这些资源在线程间的通信比较容易。</li><li>进程是重量级的，而线程是轻量级的，故多线程方式的系统开销更小。</li></ul><p><strong>进程和线程的区别</strong></p><p>进程是一个独立的运行环境，而线程是在进程中执行的一个任务。他们两个本质的区别是<strong>是否单独占有内存地址空间及其它系统资源（比如I/O）</strong>：</p><ul><li><p>进程单独占有一定的内存地址空间，所以进程间存在内存隔离，数据是分开的，数据共享复杂但是同步简单，各个进程之间互不干扰；而线程共享所属进程占有的内存地址空间和资源，数据共享简单，但是同步复杂。</p></li><li><p>进程单独占有一定的内存地址空间，一个进程出现问题不会影响其他进程，不影响主程序的稳定性，可靠性高；一个线程崩溃可能影响整个程序的稳定性，可靠性较低。</p></li><li><p>进程单独占有一定的内存地址空间，进程的创建和销毁不仅需要保存寄存器和栈信息，还需要资源的分配回收以及页调度，开销较大；线程只需要保存寄存器和栈信息，开销较小。</p></li></ul><p>另外一个重要区别是，<strong>进程是操作系统进行资源分配的基本单位，而线程是操作系统进行调度的基本单位</strong>，即CPU分配时间的单位 。</p><h2 id="线程带来的好处" tabindex="-1"><a class="header-anchor" href="#线程带来的好处" aria-hidden="true">#</a> 线程带来的好处</h2><p>一直以来，硬件的发展极其迅速，也有一个很著名的&quot;摩尔定律&quot;，可能会奇怪明明讨论的是并发编程为什么会扯到了硬件的发展，这其中的关系应该是多核CPU的发展为并发编程提供的硬件基础。</p><p>摩尔定律并不是一种自然法则或者是物理定律，它只是基于认为观测数据后，对未来的一种预测。按照所预测的速度，我们的计算能力会按照指数级别的速度增长，不久以后会拥有超强的计算能力，正是在畅想未来的时候，2004年，Intel宣布4GHz芯片的计划推迟到2005年，然后在2004年秋季，Intel宣布彻底取消4GHz的计划，也就是说摩尔定律的有效性超过了半个世纪戛然而止。但是，聪明的硬件工程师并没有停止研发的脚步，他们为了进一步提升计算速度，而不是再追求单独的计算单元，而是将多个计算单元整合到了一起，也就是形成了多核CPU。</p><p>短短十几年的时间，家用型CPU,比如Intel i7就可以达到4核心甚至8核心。而专业服务器则通常可以达到几个独立的CPU，每一个CPU甚至拥有多达8个以上的内核。因此，摩尔定律似乎在CPU核心扩展上继续得到体验。因此，多核的CPU的背景下，催生了并发编程的趋势，通过<strong>并发编程的形式可以将多核CPU的计算能力发挥到极致，性能得到提升</strong>。</p><p>顶级计算机科学家Donald Ervin Knuth如此评价这种情况：在我看来，这种现象（并发）或多或少是由于硬件设计者无计可施了导致的，他们将摩尔定律的责任推给了软件开发者。</p><p>另外，在特殊的业务场景下先天的就适合于并发编程。比如在图像处理领域，一张1024X768像素的图片，包含达到78万6千多个像素。即时将所有的像素遍历一边都需要很长的时间，面对如此复杂的计算量就需要充分利用多核的计算的能力。又比如当我们在网上购物时，为了提升响应速度，需要拆分，减库存，生成订单等等这些操作，就可以进行拆分利用多线程的技术完成。<strong>面对复杂业务模型，并行程序会比串行程序更适应业务需求，而并发编程更能吻合这种业务拆分</strong> 。正是因为这些优点，使得多线程技术能够得到重视，也是一名CS学习者应该掌握的：</p><ul><li>充分利用多核CPU的计算能力；</li><li>方便进行业务拆分，提升应用性能</li></ul><hr><blockquote><p>编辑：沉默王二，内容大部分来源以下三个开源仓库：</p><ul><li><a href="http://concurrent.redspider.group/" target="_blank" rel="noopener noreferrer">深入浅出 Java 多线程<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://github.com/CL0610/Java-concurrency" target="_blank" rel="noopener noreferrer">并发编程知识总结<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://github.com/CoderLeixiaoshuai/java-eight-part" target="_blank" rel="noopener noreferrer">Java八股文<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" 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class="theme-hope-content"><p>真不是我有意要黑这个阿里云工程师，而是他冷漠的态度，超级高水平的甩锅能力，彻彻底底把我给打败了！</p><p>给大家看一下我们的第一波交锋。从在线沟通转工单的时候，为了给这位阿里云的售后工程师加油打气，我还特意准备了一句“辛苦了”，就差跪下了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/aliyun-shuaiguo-gongchengshi-1.png" alt=""></p><p>结果等到的是阿里云售后工程师的一句：“我打开看了一下，这个图片不是您给的这个资源啊”。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/aliyun-shuaiguo-gongchengshi-2.png" alt=""></p><p>我当时心里暗想，好家伙，果然甩锅小能手啊！</p><p>然后我就耐心地给他解释，GitHub 会对图片转链，另外，用 HTTP 的时候是可以显示的，只有 CDN 启用了 HTTPS 才不显示。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/aliyun-shuaiguo-gongchengshi-3.png" alt=""></p><p>结果他回了一句，“这个我们确认不了哈，这个链接没有请求 CDN 域名，不显示也不是 CDN 返回的”。</p><p>从我们的第二波交锋可以看得出，这位阿里售后工程师的甩锅天赋开始崭露头角了，前后的逻辑也非常缜密，不容置疑。</p><p>接着我又给他解释，我说你看看这个图片标签里还有一个 <code>data-canonical-src</code> 属性，它就来自你们阿里云的 CDN 啊，另外，我把 HTTPS 改成 HTTP 就可以访问了，别的什么都不用动。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/aliyun-shuaiguo-gongchengshi-4.png" alt=""></p><p>我以为，这位阿里售后工程师在收到我这个确凿的证据后，会稍微研究一番，结果没想到，他马上就开始正儿八经地甩锅了，“<strong>这个我们也确认不了，因为这个类似代理请求了，拿不到实际请求 CDN 的返回信息</strong>”。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/aliyun-shuaiguo-gongchengshi-5.png" alt=""></p><p>好吧，我被打败了，彻彻底底地败了，败的一塌糊涂！</p><p><strong>细细品一下，这位阿里售后工程师给出的理由绝壁是天衣无缝，我根本就没办法反驳</strong>！要怪我只能怪，GitHub！</p><ul><li>第一，你为什么要转链啊？</li><li>第二，你为什么能转 HTTP 的 CDN 链接，转不了 HTTPS 的呢？</li><li>第三，你 HTTPS 也不是不能转，直接用 OSS 的 HTTPS 链接你就能转，加了 CDN 的你就不行？</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/aliyun-shuaiguo-gongchengshi-6.png" alt=""></p><p>之前给大家提到过，二哥的小破站《Java 程序员进阶之路》的图床是用 GitHub+jsDelivr 做的，免费啊，可以白嫖啊，所以我觉得用起来很爽！</p><p>但直到有一天，有个小伙伴提了一个 issue，说 jsDelivr 撤出了国内节点，导致部分图片不显示或者加载缓慢，我就坐立不安、寝食难安了！</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/aliyun-shuaiguo-gongchengshi-7.png" alt=""></p><p>毕竟二哥可是一名负责任的好同志啊，必须得解决这个图床的问题。于是我就折腾了两天的 <strong>OSS + CDN</strong>，小破站的图片是能正常访问了，只是没想到，阿里云的这套图床组合在 GitHub 上这么“不靠谱”。</p><p>真的是钱花了，事却没办好。害，先来瞧瞧我自己摸索出来的折中方案吧。</p><p>1）HTTPS 的 CDN 链接统统替换为 HTTP 的，至少能显示。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/aliyun-shuaiguo-gongchengshi-8.png" alt=""></p><p>2）如果 HTTP 的也显示有问题，有些会只显示一部分（莫名其妙），就改成 OSS 的链接。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/aliyun-shuaiguo-gongchengshi-9.png" alt=""></p><p>先把问题解决了再说。</p><p>小伙伴们有没有更好的的图床解决方案呢？可以在评论区/弹幕区给出自己的答案，救救二哥这个孩子吧！！！！！！</p><p>好了，今天的分享就先到这吧，希望小伙伴们能点点赞，转转发，好让阿里云官方看到这个问题， 重视这个问题，并解决这个问题。</p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/xianliaolaoke/aliyun-shuaiguo-gongchengshi.md" rel="noopener noreferrer" 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00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月8日</span><meta property="datePublished" content="2022-03-08T07:51:54.000Z"></span><!----><!----><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 3 分钟</span><meta property="timeRequired" content="PT3M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><p>真不是我有意要黑这个阿里云工程师，而是他冷漠的态度，超级高水平的甩锅能力，彻彻底底把我给打败了！</p><p>给大家看一下我们的第一波交锋。从在线沟通转工单的时候，为了给这位阿里云的售后工程师加油打气，我还特意准备了一句“辛苦了”，就差跪下了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/aliyun-shuaiguo-gongchengshi-1.png" alt=""></p><p>结果等到的是阿里云售后工程师的一句：“我打开看了一下，这个图片不是您给的这个资源啊”。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/aliyun-shuaiguo-gongchengshi-2.png" alt=""></p><p>我当时心里暗想，好家伙，果然甩锅小能手啊！</p><p>然后我就耐心地给他解释，GitHub 会对图片转链，另外，用 HTTP 的时候是可以显示的，只有 CDN 启用了 HTTPS 才不显示。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/aliyun-shuaiguo-gongchengshi-3.png" alt=""></p><p>结果他回了一句，“这个我们确认不了哈，这个链接没有请求 CDN 域名，不显示也不是 CDN 返回的”。</p><p>从我们的第二波交锋可以看得出，这位阿里售后工程师的甩锅天赋开始崭露头角了，前后的逻辑也非常缜密，不容置疑。</p><p>接着我又给他解释，我说你看看这个图片标签里还有一个 <code>data-canonical-src</code> 属性，它就来自你们阿里云的 CDN 啊，另外，我把 HTTPS 改成 HTTP 就可以访问了，别的什么都不用动。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/aliyun-shuaiguo-gongchengshi-4.png" alt=""></p><p>我以为，这位阿里售后工程师在收到我这个确凿的证据后，会稍微研究一番，结果没想到，他马上就开始正儿八经地甩锅了，“<strong>这个我们也确认不了，因为这个类似代理请求了，拿不到实际请求 CDN 的返回信息</strong>”。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/aliyun-shuaiguo-gongchengshi-5.png" alt=""></p><p>好吧，我被打败了，彻彻底底地败了，败的一塌糊涂！</p><p><strong>细细品一下，这位阿里售后工程师给出的理由绝壁是天衣无缝，我根本就没办法反驳</strong>！要怪我只能怪，GitHub！</p><ul><li>第一，你为什么要转链啊？</li><li>第二，你为什么能转 HTTP 的 CDN 链接，转不了 HTTPS 的呢？</li><li>第三，你 HTTPS 也不是不能转，直接用 OSS 的 HTTPS 链接你就能转，加了 CDN 的你就不行？</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/aliyun-shuaiguo-gongchengshi-6.png" alt=""></p><p>之前给大家提到过，二哥的小破站《Java 程序员进阶之路》的图床是用 GitHub+jsDelivr 做的，免费啊，可以白嫖啊，所以我觉得用起来很爽！</p><p>但直到有一天，有个小伙伴提了一个 issue，说 jsDelivr 撤出了国内节点，导致部分图片不显示或者加载缓慢，我就坐立不安、寝食难安了！</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/aliyun-shuaiguo-gongchengshi-7.png" alt=""></p><p>毕竟二哥可是一名负责任的好同志啊，必须得解决这个图床的问题。于是我就折腾了两天的 <strong>OSS + CDN</strong>，小破站的图片是能正常访问了，只是没想到，阿里云的这套图床组合在 GitHub 上这么“不靠谱”。</p><p>真的是钱花了，事却没办好。害，先来瞧瞧我自己摸索出来的折中方案吧。</p><p>1）HTTPS 的 CDN 链接统统替换为 HTTP 的，至少能显示。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/aliyun-shuaiguo-gongchengshi-8.png" alt=""></p><p>2）如果 HTTP 的也显示有问题，有些会只显示一部分（莫名其妙），就改成 OSS 的链接。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/aliyun-shuaiguo-gongchengshi-9.png" alt=""></p><p>先把问题解决了再说。</p><p>小伙伴们有没有更好的的图床解决方案呢？可以在评论区/弹幕区给出自己的答案，救救二哥这个孩子吧！！！！！！</p><p>好了，今天的分享就先到这吧，希望小伙伴们能点点赞，转转发，好让阿里云官方看到这个问题， 重视这个问题，并解决这个问题。</p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/xianliaolaoke/aliyun-shuaiguo-gongchengshi.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 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xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 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class="theme-hope-content"><p>大家好，我是二哥呀！</p><p>今天和两个合伙人开了个腾讯会议，没想到差点因为一个功能上的分歧散了伙！！好在大家都是奔三的男人了，吵归吵，但都是奔着做事去的。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/chadiansanhuo-1.png" alt=""></p><p>不过冷静下来后，我感觉主要的责任在我，所以我打算写篇文章反思一下自己。</p><p>我可以选择悄悄地记在备忘录里，但我觉得分享出来更正式一点，也顺带表明一下自己的决心。还有就是，以前我总是毫无保留的，什么都给大家分享，可随着关注的人数越来越多，就慢慢变得越来越收敛。</p><p>这一点老读者应该能感受得到。今天经过沉痛的反思后，我决定还是做回从前的自己。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/chadiansanhuo-2.png" alt=""></p><p>人不能患得患失，否则就变得谨小慎微，很多话很多事就不敢说不敢做了。</p><hr><p>记得我 2 万读者关注的时候，发过一篇「不要去考研」的文章，当时评论区直接就炸锅了，甚至有小伙伴扬言要投诉，我吓得直接删文了。</p><p>那时候自己的思维方式确实是觉得，考研对于一些小伙伴来说，是投入产出比很低的，我就是，早早地就离开了校园，去实习参加工作了。</p><p>因为每个人的想法和计划都是完全不一样的，人生经历、教育方式也都完全不一样，在某些事情和观念上就很难达成一致，就像今天我和另外一个合伙人在一个功能上的分歧一样。</p><p><strong>我上大学那会，就是一心想要参加工作，早点挣钱，摆脱向父母伸手要钱的那种惭愧</strong>。再加上我对校园生活的迷茫和失望，我觉得只有早一点进入社会，挨了社会的毒打，我才能更快速地成长，反而在学校只会一味的“温水煮青蛙”。</p><p>现在已经有不少大学生在校期间就做自媒体了，恰饭收入也很可观，但我们那时候没有这样的观念和意识。有的只是去街头发一发传单，或者趁寒暑假去某个电子厂打打工，真的是这样！</p><p>我大学去发过一次传单，说实话，很辛苦，厚厚的一沓传单，要一个一个人去发，还要冒着被拒绝的风险，对于性格极其内向又不知道偷懒耍滑的我，简直就是折磨。</p><p>我发了一天就放弃了，但按照规则要发够十五天才会发劳务费，所以我当时只能算是“义务劳动”。</p><p>不过那次发传单也深深地刺激了我，以后打死也不要干这种工作！一定要找一份适合自己，能发挥出自我价值的工作。</p><p>我做到了！大二结束我就去苏州找工作了，并且也找到了，这期间也经历了很多挫折，老读者估计还有印象。</p><p>但经过两个多月的调整，还是找到了一家我自己很满意的外企 offer，虽然实习工资就 1200 元，我记得非常清楚，但对于那时候的我，简直就是焕然新生。</p><p>那种可以花自己钱的感觉，真特么好！</p><p>所以，在很长一段时间里，我都是考研的反对者，并且极度的反对。</p><p>但去年我改变了这种想法，也是因为我一直以来的一个合作伙伴，也是我的大学同学，他考研成功了！他的毅力和坚持，让我对考研有了新的认知，所以我后来又写了一篇，<a href="https://mp.weixin.qq.com/s/eKJIxcwOdykHza4AMRoiTw" target="_blank" rel="noopener noreferrer">我打算去读个研究生了<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>的文章。</p><p>当然了，如果让我重新来选择一次的话，我仍然会选择大学那会早点出去工作，而不是去考研。</p><p>因为我需要早点去挣钱，减轻父母的压力。毕竟面朝黄土背朝天的农民，能供一个大学生本身就颇为不易，作为家里的长子，有我义务有责任去这样做。</p><p>事实证明，我的选择是正确的。</p><p>进入公司后，我比任何一起进去的新人都要努力，所以我拿到转正 offer 是最早的，涨薪是最多的，职位晋升也是最快的，哪怕他们当中的绝大多数人学历都比我好。</p><p>进入工作后，学历的影响会越来越小。在我看来，学历在一开始你投简历找工作的时候发挥的作用最大，一旦到了同一家公司同一个部门同一个团队，影响最大的只有你的工作表现。</p><p>之所以我后来改变了对考研的看法，是因为随着生活的稳定，心态也发生了改变。另外，对于一些学弟学妹们来说，考研确实对他们来说是一个好的选择，家里的经济条件允许，自身的学习状态也好，那趁热打铁获得一个更高的学历，以及更扎实的基本功，确实是值得去做的。</p><p>私下里仍然有不少小伙伴问我考研和工作之间到底该如何选择，现在去微信上搜了一下“考研”的关键字，好家伙，有好多好多！！！！</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/chadiansanhuo-3.png" alt=""></p><p>我的观点是，根据自身的实际情况出发，你能考上研究生的几率有多大？你为什么要考研？</p><p>人都是会改变的，会进步的。</p><p>就像我和我的一个合伙人一样，我们俩虽然会议中间吵得很凶，甚至扯着嗓门吼起来了，就连性格一向“沉稳”的我，差一点就绷不住要喊出来那句，“不行就散伙”！</p><p>但其实我们就是因为一个很小很小的点，存在分歧，贴出来也不怕大家笑话，就是，我认为不应该新建一个名叫“未分类”的栏目，把没有分类的文章归类到它下面。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/chadiansanhuo-4.png" alt=""></p><p>而我的合伙人认为，未分类的存在很合理，否则那些没有栏目的文章如何检索如何管理。</p><p>我们就因为这件事，前后争论了两天，哈哈哈，现在想想，真是不可思议。不过后来，在我的“威逼利诱”下，合伙人还是屈服了——先不管那些未分类的文章。</p><p>其实我们都有道理，hhh。</p><p>人很多时候，对待某一件事的确是很难在短时间内达成一致的，还是那句话，大家的认知、经验、位置都不尽相同，关键是，都还有各自的道理和原因。</p><p><strong>但重要的是，大家聚在一起，一定是奔着做事去的</strong>。</p><p>那建立在这个出发点的分歧都不叫分歧，都能得到解决，因为冷静下来后，大家还是会设身处地为对方考虑的。原来没有考虑到的漏洞也会得到修补，比如说我就没有考虑过没有分类的文章该如何检索和管理？</p><p>幸运的是，时隔多年，我们还能聚在一起敲敲代码，做点小事情，虽然大学毕业后我们三个人见面的次数寥寥无几。</p><p>我觉得这就是同学之间的友谊吧！</p><p>不确定大家是不是？反正我能处上十多年的朋友，基本上都是学校时期的同学，不多，但个个都是能伸出援手和分享快乐的，并且基本上没有任何的利益关系绑在一块，这是非常令人欣慰的。</p><p>哪怕是我做的这件事，可能在大多数人眼里都没有意义，他们也愿意成为我的合伙人，并且不求回报，并且是在既要工作，又要兼顾家庭的情况下。</p><p>真的是，我必须要对他们说一声谢谢。</p><p>好了，今天的分享就到这里吧，说得自己都有一点点感动了，眼角有点湿润。。。。。。</p><p>害，都“18”岁的老少年了，还是这么容易感动。</p><p>下期见~</p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/xianliaolaoke/chadiansanhuo.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg 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9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月8日</span><meta property="datePublished" content="2022-03-08T07:51:54.000Z"></span><!----><!----><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 7 分钟</span><meta property="timeRequired" content="PT7M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><p>大家好，我是二哥呀！</p><p>今天和两个合伙人开了个腾讯会议，没想到差点因为一个功能上的分歧散了伙！！好在大家都是奔三的男人了，吵归吵，但都是奔着做事去的。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/chadiansanhuo-1.png" alt=""></p><p>不过冷静下来后，我感觉主要的责任在我，所以我打算写篇文章反思一下自己。</p><p>我可以选择悄悄地记在备忘录里，但我觉得分享出来更正式一点，也顺带表明一下自己的决心。还有就是，以前我总是毫无保留的，什么都给大家分享，可随着关注的人数越来越多，就慢慢变得越来越收敛。</p><p>这一点老读者应该能感受得到。今天经过沉痛的反思后，我决定还是做回从前的自己。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/chadiansanhuo-2.png" alt=""></p><p>人不能患得患失，否则就变得谨小慎微，很多话很多事就不敢说不敢做了。</p><hr><p>记得我 2 万读者关注的时候，发过一篇「不要去考研」的文章，当时评论区直接就炸锅了，甚至有小伙伴扬言要投诉，我吓得直接删文了。</p><p>那时候自己的思维方式确实是觉得，考研对于一些小伙伴来说，是投入产出比很低的，我就是，早早地就离开了校园，去实习参加工作了。</p><p>因为每个人的想法和计划都是完全不一样的，人生经历、教育方式也都完全不一样，在某些事情和观念上就很难达成一致，就像今天我和另外一个合伙人在一个功能上的分歧一样。</p><p><strong>我上大学那会，就是一心想要参加工作，早点挣钱，摆脱向父母伸手要钱的那种惭愧</strong>。再加上我对校园生活的迷茫和失望，我觉得只有早一点进入社会，挨了社会的毒打，我才能更快速地成长，反而在学校只会一味的“温水煮青蛙”。</p><p>现在已经有不少大学生在校期间就做自媒体了，恰饭收入也很可观，但我们那时候没有这样的观念和意识。有的只是去街头发一发传单，或者趁寒暑假去某个电子厂打打工，真的是这样！</p><p>我大学去发过一次传单，说实话，很辛苦，厚厚的一沓传单，要一个一个人去发，还要冒着被拒绝的风险，对于性格极其内向又不知道偷懒耍滑的我，简直就是折磨。</p><p>我发了一天就放弃了，但按照规则要发够十五天才会发劳务费，所以我当时只能算是“义务劳动”。</p><p>不过那次发传单也深深地刺激了我，以后打死也不要干这种工作！一定要找一份适合自己，能发挥出自我价值的工作。</p><p>我做到了！大二结束我就去苏州找工作了，并且也找到了，这期间也经历了很多挫折，老读者估计还有印象。</p><p>但经过两个多月的调整，还是找到了一家我自己很满意的外企 offer，虽然实习工资就 1200 元，我记得非常清楚，但对于那时候的我，简直就是焕然新生。</p><p>那种可以花自己钱的感觉，真特么好！</p><p>所以，在很长一段时间里，我都是考研的反对者，并且极度的反对。</p><p>但去年我改变了这种想法，也是因为我一直以来的一个合作伙伴，也是我的大学同学，他考研成功了！他的毅力和坚持，让我对考研有了新的认知，所以我后来又写了一篇，<a href="https://mp.weixin.qq.com/s/eKJIxcwOdykHza4AMRoiTw" target="_blank" rel="noopener noreferrer">我打算去读个研究生了<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>的文章。</p><p>当然了，如果让我重新来选择一次的话，我仍然会选择大学那会早点出去工作，而不是去考研。</p><p>因为我需要早点去挣钱，减轻父母的压力。毕竟面朝黄土背朝天的农民，能供一个大学生本身就颇为不易，作为家里的长子，有我义务有责任去这样做。</p><p>事实证明，我的选择是正确的。</p><p>进入公司后，我比任何一起进去的新人都要努力，所以我拿到转正 offer 是最早的，涨薪是最多的，职位晋升也是最快的，哪怕他们当中的绝大多数人学历都比我好。</p><p>进入工作后，学历的影响会越来越小。在我看来，学历在一开始你投简历找工作的时候发挥的作用最大，一旦到了同一家公司同一个部门同一个团队，影响最大的只有你的工作表现。</p><p>之所以我后来改变了对考研的看法，是因为随着生活的稳定，心态也发生了改变。另外，对于一些学弟学妹们来说，考研确实对他们来说是一个好的选择，家里的经济条件允许，自身的学习状态也好，那趁热打铁获得一个更高的学历，以及更扎实的基本功，确实是值得去做的。</p><p>私下里仍然有不少小伙伴问我考研和工作之间到底该如何选择，现在去微信上搜了一下“考研”的关键字，好家伙，有好多好多！！！！</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/chadiansanhuo-3.png" alt=""></p><p>我的观点是，根据自身的实际情况出发，你能考上研究生的几率有多大？你为什么要考研？</p><p>人都是会改变的，会进步的。</p><p>就像我和我的一个合伙人一样，我们俩虽然会议中间吵得很凶，甚至扯着嗓门吼起来了，就连性格一向“沉稳”的我，差一点就绷不住要喊出来那句，“不行就散伙”！</p><p>但其实我们就是因为一个很小很小的点，存在分歧，贴出来也不怕大家笑话，就是，我认为不应该新建一个名叫“未分类”的栏目，把没有分类的文章归类到它下面。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/chadiansanhuo-4.png" alt=""></p><p>而我的合伙人认为，未分类的存在很合理，否则那些没有栏目的文章如何检索如何管理。</p><p>我们就因为这件事，前后争论了两天，哈哈哈，现在想想，真是不可思议。不过后来，在我的“威逼利诱”下，合伙人还是屈服了——先不管那些未分类的文章。</p><p>其实我们都有道理，hhh。</p><p>人很多时候，对待某一件事的确是很难在短时间内达成一致的，还是那句话，大家的认知、经验、位置都不尽相同，关键是，都还有各自的道理和原因。</p><p><strong>但重要的是，大家聚在一起，一定是奔着做事去的</strong>。</p><p>那建立在这个出发点的分歧都不叫分歧，都能得到解决，因为冷静下来后，大家还是会设身处地为对方考虑的。原来没有考虑到的漏洞也会得到修补，比如说我就没有考虑过没有分类的文章该如何检索和管理？</p><p>幸运的是，时隔多年，我们还能聚在一起敲敲代码，做点小事情，虽然大学毕业后我们三个人见面的次数寥寥无几。</p><p>我觉得这就是同学之间的友谊吧！</p><p>不确定大家是不是？反正我能处上十多年的朋友，基本上都是学校时期的同学，不多，但个个都是能伸出援手和分享快乐的，并且基本上没有任何的利益关系绑在一块，这是非常令人欣慰的。</p><p>哪怕是我做的这件事，可能在大多数人眼里都没有意义，他们也愿意成为我的合伙人，并且不求回报，并且是在既要工作，又要兼顾家庭的情况下。</p><p>真的是，我必须要对他们说一声谢谢。</p><p>好了，今天的分享就到这里吧，说得自己都有一点点感动了，眼角有点湿润。。。。。。</p><p>害，都“18”岁的老少年了，还是这么容易感动。</p><p>下期见~</p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/xianliaolaoke/chadiansanhuo.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg 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class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/xianliaolaoke/chengxuyuannv-chonghui-java.html#一、不服不行" class="router-link-active router-link-exact-active toc-link level3">一、不服不行</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xianliaolaoke/chengxuyuannv-chonghui-java.html#二、一点建议" class="router-link-active router-link-exact-active toc-link level3">二、一点建议</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xianliaolaoke/chengxuyuannv-chonghui-java.html#三、开始卷吧" class="router-link-active router-link-exact-active toc-link level3">三、开始卷吧</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><p>大家好，我是二哥呀！前几天一个91年的小姐姐给我发私信说，她19年回老家创业开了个实体店做建材生意，但受困于疫情，生意越来越不好做，<strong>于是就萌生重回软件开发 base 武汉</strong>的想法，问我有什么建议。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/chengxuyuannv-chonghui-java-1.png" alt=""></p><p>刚好今天有空，就找她好好聊了一下，给了她一些建议，同时也给了一些我最近整理的学习资料。小姐姐说她会仔细学习的，那份决心给我的触动很大，所以我打算再来写一篇文章帮她深入地分析一下，同时也希望给有同样困惑的小伙伴一点点启发和帮助~</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/chengxuyuannv-chonghui-java-2.png" alt=""></p><h3 id="一、不服不行" tabindex="-1"><a class="header-anchor" href="#一、不服不行" aria-hidden="true">#</a> 一、不服不行</h3><p>说真的，我挺佩服这位小姐姐的。她 14 年本科毕业，在深圳工作了 3 年，做 Web 开发，然后就回老家结婚生子，之后就和老公一起创业做建材生意了。</p><p>这期间有四五年的空白期，但依然想重回软件开发。换做是我，我可能就没有这份勇气。</p><p>小姐姐的计划是用一年的时间去学习＋实践，并且是在未脱产的情况下，因为生意这边还需要兼顾，然后明年过完年去面试。</p><p>就说这一点，真的是不服不行。<strong>人其实最怕的就是做事的决心和毅力</strong>，很多看似不可能完成的事情，可能就真的成了。</p><p>想想也是。</p><p>我 14 年开始坚持写作，这一坚持，就坚持了 8 年，就不亮我的那些成绩了，单凭坚持这一条，我觉得自己就够得上“傻逼”这称号，啊，不，“牛逼”的称号，哈哈哈。</p><p>一路走来，我见证了太多放弃的人，包括那个差一点的自己。放弃的时候，就拉自己一把。</p><h3 id="二、一点建议" tabindex="-1"><a class="header-anchor" href="#二、一点建议" aria-hidden="true">#</a> 二、一点建议</h3><p>针对小姐姐的情况，最重要的是，要想方设法把自己简历上的四五年空白期给补出来。我的意思不是说去造假，而是自己私底下去付出比别人更多的努力，把这样的空白期给补一补。</p><p>至于能补多少，就全凭自己的努力程度了。</p><p>小姐姐 base 武汉，那我们就到 boss 直聘上看一下 Java 岗的招聘情况哈，岗位还是比较充裕的，3 到 5 年的薪资待遇在 15k-25k 之间。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/chengxuyuannv-chonghui-java-3.png" alt=""></p><p>再来看一下任职要求：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/chengxuyuannv-chonghui-java-4.png" alt=""></p><p>第一，精通 Java 语言，现在的招聘要求基本上都这样，精通是常态。针对这种“无理”的要求，办法只有一个，就是去背八股文！先背会再说。面试官问的你能答上来就表明你是精通。</p><p>那二哥的小破站，<strong>Java 程序员进阶之路</strong>，基本上把 Java 的高频面试题都覆盖了，包括 Java 基础、Java 集合框架、Java 并发、Java 虚拟机等，去背就对了。</p><blockquote><p>https://tobebetterjavaer.com/</p></blockquote><p>第二，熟练使用 Spring 全家桶，包括 Spring Boot 和 Spring Cloud，以及分布式、微服务、云原生等等。</p><p>这个去 GitHub 上找个像样的练手项目出来做做就行了，像 vhr、mall、miaosha 这些我推荐过很多次的实战项目，现在基本上都能满足这个要求了，不满足的地方，自己从别的项目里面嫁接过去就行了。</p><p>二哥今年也会推出一个实战项目，编程喵喵，第一版快做出来了，到时候我会出详细的手把手的教程，带大家一起实战。</p><p>第三，熟练使用 MySQL，这个也是做 JavaWeb 开发的基本要求了，MySQL 是必知必会的。索引、binlog 算是 MySQL 的灵魂，然后就是 SQL 语句的编写，<a href="https://mp.weixin.qq.com/s/c-sy7tM0BmrqMUQFW7C65g" target="_blank" rel="noopener noreferrer">昨天的文章<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>有收藏吧，按照里面的内容去消化就对了。</p><p>第四，具备扎实的计算机基础知识，包括操作系统、设计模式、树结构与算法、网络安全等，这方面的资料也有很多，可以找二哥要。</p><p>第五，熟悉分布式和高并发，二哥之前发过这方面的小课，不知道有多少小伙伴看过哈。</p><p>第六，综合素质，包括解决问题的能力、抗压能力、沟通能力等等，女生在抗压能力上可能弱一点，但在沟通能力绝对是吊打男生。</p><p>至于解决问题的能力，就靠实战中的积累了，这个和思维、认知、眼界的关联性比较强。</p><p>从认知要求上可以看得出，学历是第一位，然后是 Java 基础，其次是 Spring 全家桶，之后是 MySQL，然后是计算机基础知识，最后是综合素质。</p><p>理清楚这个，就知道学习的重点了，接下来就是卷。</p><h3 id="三、开始卷吧" tabindex="-1"><a class="header-anchor" href="#三、开始卷吧" aria-hidden="true">#</a> 三、开始卷吧</h3><p>说句实在话，单身“solo”的时候恐怕是学习时间最充分的；结婚生子后，基本上可以和游戏娱乐说拜拜了，时间根本就不够用。</p><p>小姐姐聊天的时候告诉我，她是 17 年结婚生子的，那也就是说，她的学习时间基本上只能靠自己挤一挤了，况且还要兼顾生意，真的是——呜呜呜。</p><p>成年人，说多了都是泪。</p><p>但<strong>既然选择了远方. 便只顾风雨兼程</strong>，卷吧！</p><p>给小姐姐的一点温馨提醒，一定要注意休息，身体也是革命的本钱，要照顾好自己。</p><p>最后，也希望大家能在评论区给出自己的建议，可以的话，点个赞，就当给小姐姐鼓励了。我们下期见~</p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/xianliaolaoke/chengxuyuannv-chonghui-java.md" rel="noopener 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123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 5 分钟</span><meta property="timeRequired" content="PT5M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/xianliaolaoke/chengxuyuannv-chonghui-java.html#一、不服不行" class="router-link-active router-link-exact-active toc-link level3">一、不服不行</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xianliaolaoke/chengxuyuannv-chonghui-java.html#二、一点建议" class="router-link-active router-link-exact-active toc-link level3">二、一点建议</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xianliaolaoke/chengxuyuannv-chonghui-java.html#三、开始卷吧" class="router-link-active router-link-exact-active toc-link level3">三、开始卷吧</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><p>大家好，我是二哥呀！前几天一个91年的小姐姐给我发私信说，她19年回老家创业开了个实体店做建材生意，但受困于疫情，生意越来越不好做，<strong>于是就萌生重回软件开发 base 武汉</strong>的想法，问我有什么建议。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/chengxuyuannv-chonghui-java-1.png" alt=""></p><p>刚好今天有空，就找她好好聊了一下，给了她一些建议，同时也给了一些我最近整理的学习资料。小姐姐说她会仔细学习的，那份决心给我的触动很大，所以我打算再来写一篇文章帮她深入地分析一下，同时也希望给有同样困惑的小伙伴一点点启发和帮助~</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/chengxuyuannv-chonghui-java-2.png" alt=""></p><h3 id="一、不服不行" tabindex="-1"><a class="header-anchor" href="#一、不服不行" aria-hidden="true">#</a> 一、不服不行</h3><p>说真的，我挺佩服这位小姐姐的。她 14 年本科毕业，在深圳工作了 3 年，做 Web 开发，然后就回老家结婚生子，之后就和老公一起创业做建材生意了。</p><p>这期间有四五年的空白期，但依然想重回软件开发。换做是我，我可能就没有这份勇气。</p><p>小姐姐的计划是用一年的时间去学习＋实践，并且是在未脱产的情况下，因为生意这边还需要兼顾，然后明年过完年去面试。</p><p>就说这一点，真的是不服不行。<strong>人其实最怕的就是做事的决心和毅力</strong>，很多看似不可能完成的事情，可能就真的成了。</p><p>想想也是。</p><p>我 14 年开始坚持写作，这一坚持，就坚持了 8 年，就不亮我的那些成绩了，单凭坚持这一条，我觉得自己就够得上“傻逼”这称号，啊，不，“牛逼”的称号，哈哈哈。</p><p>一路走来，我见证了太多放弃的人，包括那个差一点的自己。放弃的时候，就拉自己一把。</p><h3 id="二、一点建议" tabindex="-1"><a class="header-anchor" href="#二、一点建议" aria-hidden="true">#</a> 二、一点建议</h3><p>针对小姐姐的情况，最重要的是，要想方设法把自己简历上的四五年空白期给补出来。我的意思不是说去造假，而是自己私底下去付出比别人更多的努力，把这样的空白期给补一补。</p><p>至于能补多少，就全凭自己的努力程度了。</p><p>小姐姐 base 武汉，那我们就到 boss 直聘上看一下 Java 岗的招聘情况哈，岗位还是比较充裕的，3 到 5 年的薪资待遇在 15k-25k 之间。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/chengxuyuannv-chonghui-java-3.png" alt=""></p><p>再来看一下任职要求：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/chengxuyuannv-chonghui-java-4.png" alt=""></p><p>第一，精通 Java 语言，现在的招聘要求基本上都这样，精通是常态。针对这种“无理”的要求，办法只有一个，就是去背八股文！先背会再说。面试官问的你能答上来就表明你是精通。</p><p>那二哥的小破站，<strong>Java 程序员进阶之路</strong>，基本上把 Java 的高频面试题都覆盖了，包括 Java 基础、Java 集合框架、Java 并发、Java 虚拟机等，去背就对了。</p><blockquote><p>https://tobebetterjavaer.com/</p></blockquote><p>第二，熟练使用 Spring 全家桶，包括 Spring Boot 和 Spring Cloud，以及分布式、微服务、云原生等等。</p><p>这个去 GitHub 上找个像样的练手项目出来做做就行了，像 vhr、mall、miaosha 这些我推荐过很多次的实战项目，现在基本上都能满足这个要求了，不满足的地方，自己从别的项目里面嫁接过去就行了。</p><p>二哥今年也会推出一个实战项目，编程喵喵，第一版快做出来了，到时候我会出详细的手把手的教程，带大家一起实战。</p><p>第三，熟练使用 MySQL，这个也是做 JavaWeb 开发的基本要求了，MySQL 是必知必会的。索引、binlog 算是 MySQL 的灵魂，然后就是 SQL 语句的编写，<a href="https://mp.weixin.qq.com/s/c-sy7tM0BmrqMUQFW7C65g" target="_blank" rel="noopener noreferrer">昨天的文章<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>有收藏吧，按照里面的内容去消化就对了。</p><p>第四，具备扎实的计算机基础知识，包括操作系统、设计模式、树结构与算法、网络安全等，这方面的资料也有很多，可以找二哥要。</p><p>第五，熟悉分布式和高并发，二哥之前发过这方面的小课，不知道有多少小伙伴看过哈。</p><p>第六，综合素质，包括解决问题的能力、抗压能力、沟通能力等等，女生在抗压能力上可能弱一点，但在沟通能力绝对是吊打男生。</p><p>至于解决问题的能力，就靠实战中的积累了，这个和思维、认知、眼界的关联性比较强。</p><p>从认知要求上可以看得出，学历是第一位，然后是 Java 基础，其次是 Spring 全家桶，之后是 MySQL，然后是计算机基础知识，最后是综合素质。</p><p>理清楚这个，就知道学习的重点了，接下来就是卷。</p><h3 id="三、开始卷吧" tabindex="-1"><a class="header-anchor" href="#三、开始卷吧" aria-hidden="true">#</a> 三、开始卷吧</h3><p>说句实在话，单身“solo”的时候恐怕是学习时间最充分的；结婚生子后，基本上可以和游戏娱乐说拜拜了，时间根本就不够用。</p><p>小姐姐聊天的时候告诉我，她是 17 年结婚生子的，那也就是说，她的学习时间基本上只能靠自己挤一挤了，况且还要兼顾生意，真的是——呜呜呜。</p><p>成年人，说多了都是泪。</p><p>但<strong>既然选择了远方. 便只顾风雨兼程</strong>，卷吧！</p><p>给小姐姐的一点温馨提醒，一定要注意休息，身体也是革命的本钱，要照顾好自己。</p><p>最后，也希望大家能在评论区给出自己的建议，可以的话，点个赞，就当给小姐姐鼓励了。我们下期见~</p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/xianliaolaoke/chengxuyuannv-chonghui-java.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 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class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/xianliaolaoke/daxue-nuli-jisuanji.html#一、掌握信息源" class="router-link-active router-link-exact-active toc-link level3">一、掌握信息源</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xianliaolaoke/daxue-nuli-jisuanji.html#二、专注一门编程语言" class="router-link-active router-link-exact-active toc-link level3">二、专注一门编程语言</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xianliaolaoke/daxue-nuli-jisuanji.html#三、多动手勤实践" class="router-link-active router-link-exact-active toc-link level3">三、多动手勤实践</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xianliaolaoke/daxue-nuli-jisuanji.html#四、早投简历早实习" class="router-link-active router-link-exact-active toc-link level3">四、早投简历早实习</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xianliaolaoke/daxue-nuli-jisuanji.html#五、一点心里话" class="router-link-active router-link-exact-active toc-link level3">五、一点心里话</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><p>过年的时候，在知乎上刷到这样一个话题：<strong>大学计算机系最努力的同学都是如何学习的</strong>？</p><p>我一下子就想起了 10 年前的自己，非清北复交 985 牛逼学历，智商平平，就靠一个人的努力，毕业的时候竟然也拿到了心仪的 offer。</p><p>于是趁着假期连续爆肝了两周，终于肝出了这期视频：希望能给学弟学妹们一点点启发和帮助。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/daxue-nuli-jisuanji-1.jpg" alt=""></p><p>下面是视频链接，感兴趣的小伙伴可以跳过去给二哥刷个三连，谢谢支持了。</p><blockquote><p><a href="https://www.bilibili.com/video/BV1434y117xE/" target="_blank" rel="noopener noreferrer">https://www.bilibili.com/video/BV1434y117xE/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>下面是文字版，发出来给公众号的读者欣赏一下我这完美无缺的学习计划。</p><hr><p>我就是啊。</p><ul><li>晚上 23 点到早上 7 点，睡觉！</li><li>7 点到 7.30，赖床</li><li>7.30 到 8 点，洗漱吃早饭</li><li>8点到 8.10 学习操作系统</li><li>8.10 到 8.20 学习计算机组成原理</li><li>8.20 到 8.30 学习计算机网络</li><li>8.30 到 8.40 学习数据结构</li><li>8.40 到 8.50 刷LeetCode</li><li>8.50 到 9 点 学习数据库</li><li>9 点 到 9 点10分 学习 Java 语言</li><li>9.10 到 12点 刷一会会小姐姐视频，休息下眼睛</li><li>12.00 到 13.00 午饭午休时间</li><li>13.00 到 13.10 学习 go 语言</li><li>13.10 到 13.20 学习 Python 语言</li><li>13.20 到 13.30 学习 C 语言</li><li>13.30 到 18点 打一会会王者，放松下</li><li>18.00 到 19.00 晚饭时间</li><li>19.00 到 19.10 背 Java 八股文</li><li>19.10 到 19.20 刷 JavaGuide 面试题</li><li>19.20 到 23 点 和女朋友聊聊天，维护一下感情</li></ul><p>可以看得出，我这个学习计划安排得非常合理，劳逸结合，不浪费一分一秒。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/daxue-nuli-jisuanji-2.gif" alt=""></p><p>只要你在大学一天，你就有责任、有义务把自己的大学生活过得充实，精彩，别犹豫了，卷起来吧！！！！</p><p>相比其他大部分专业，计算机是真的可以通过努力改变命运的专业，不看成绩，不限出身。</p><h3 id="一、掌握信息源" tabindex="-1"><a class="header-anchor" href="#一、掌握信息源" aria-hidden="true">#</a> 一、掌握信息源</h3><p>我刚上大一的时候，和所有普通的新生一样，面对崭新的大学生活，面对应接不暇的社团，有点茫然不知所措。</p><p>短暂的迷茫后我选择走出寝室，走进图书馆，没想到结识了很多优秀的学长学姐，大学最努力的同学基本上都在这里。我不厌其烦地向他们请教问题，他们都热心帮我解答，不得不承认，优秀的人从来都不吝啬于帮助他人。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/daxue-nuli-jisuanji-3.jpg" alt=""></p><p>我向他们请教的问题有：</p><ul><li>国家奖学金的评比条件有哪些，</li><li>含金量比较高的比赛有哪些，</li><li>大学期间必须考的证书有哪些，</li></ul><p>当同班同学都还在迷茫不知所措的时候，这些重要的信息源让我有了快人一步的资本。</p><h3 id="二、专注一门编程语言" tabindex="-1"><a class="header-anchor" href="#二、专注一门编程语言" aria-hidden="true">#</a> 二、专注一门编程语言</h3><p>刚入门的时候，最大的忌讳就是朝三暮四，这个月学 C语言，下个月学 Python，再下个月学 Java，以至于自己在入门阶段就迷茫了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/daxue-nuli-jisuanji-4.jpeg" alt=""></p><p>我的建议是最好专注于一门编程语言，如果想要走人工智能这条路的话，选 Python 就对了；如果想走算法岗的话，可以选择 C语言，然后再深入学习 C++，之后去把 LeetCode 刷起来；如果想本科毕业就工作赚钱的话，Java 是最优的选择，岗位多，薪资待遇也给力；以后也可以直接转go岗，如果不想那么卷的话，前端也是一个不错的选择。</p><p>专注于一门编程语言，能让你快速积累这门编程语言的学习经验，以后想切换到其他编程语言的时候，也会得心应手，毕竟编程语言之间只是语法上的差异而已，底层的数据结构，关键算法都是相通的。</p><h3 id="三、多动手勤实践" tabindex="-1"><a class="header-anchor" href="#三、多动手勤实践" aria-hidden="true">#</a> 三、多动手勤实践</h3><p>大学四年，我的整体规划是，大一时入门，大二时夯实基础，大三时拼命卷，大四时好好准备校招，能早点出去实习就早点去。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/daxue-nuli-jisuanji-5.jpg" alt=""></p><p>至于学习资料，网上已经有很多免费开源的了，并且绝大多数都非常的优质，只要你肯花时间去筛选和整理。</p><p>这是我自己整理的一套，偏 Java 后端路线的 PDF 书单，在GitHub上也有3。6k的star了，说明很多小伙伴都很认可，包括入门→工具→框架→数据库→并发编程→jvm→性能优化→设计模式→操作系统→计算机网络→数据结构与算法→面试→架构等等，可以说非常的全面和系统。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/daxue-nuli-jisuanji-6.jpg" alt=""></p><p>你也可以拿来作为参考。</p><p>学习的时候记住一点，一定要多动手勤实践，切忌眼高手低。</p><p>很多小伙伴经常找我反馈说自己学完就忘，看的时候明明白白，一到敲代码环节人就傻了。背后的原因其实很简单，就是因为动手少，没有思维记忆，没有肌肉记忆。</p><p>所以说我的建议是代码敲起来，笔记记起来！</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/daxue-nuli-jisuanji-7.gif" alt=""></p><p>记住卖油翁的那句话：无他，唯手熟尔！</p><h3 id="四、早投简历早实习" tabindex="-1"><a class="header-anchor" href="#四、早投简历早实习" aria-hidden="true">#</a> 四、早投简历早实习</h3><p>如果不打算考研的话，一定要早投简历早实习。</p><p>记得大三寒假的时候，很多同学都回家过年了，我一个人选择南下苏州去 ，本以为能找一个实习就很不错了，没想到好几个公司的面试都过了，这给了我很大的信心。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/daxue-nuli-jisuanji-8.jpeg" alt=""></p><p>唐代诗人刘禹锡有句诗是这样写的：<strong>千淘万漉虽辛苦，吹尽狂沙始到金</strong>。</p><p>努力虽好，却也要趁早行动，千万不要一直埋头苦学，该亮剑的时候就要趁早亮。毕竟早就是优势啊。</p><p>好好准备一份简历，然后去投自己心仪的公司，从易到难，不要一开始就投自己最心仪的那个，给自己一个缓冲的机会，积攒一些面试的经验。</p><p>一次面试挂了不要紧，二次面试挂了不要紧，即便十次、二十次也不要气馁，多总结，多反思，经验都是在实战中获得的。</p><h3 id="五、一点心里话" tabindex="-1"><a class="header-anchor" href="#五、一点心里话" aria-hidden="true">#</a> 五、一点心里话</h3><p>这个世界上本没有大神学霸，一切都只是厚积薄发，大学是人生最美好的阶段，日复一日的努力，你终将会“乘风破浪，直挂云帆”。</p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/xianliaolaoke/daxue-nuli-jisuanji.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 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9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年2月14日</span><meta property="datePublished" content="2022-02-14T08:58:04.000Z"></span><!----><!----><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 6 分钟</span><meta property="timeRequired" content="PT6M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/xianliaolaoke/daxue-nuli-jisuanji.html#一、掌握信息源" class="router-link-active router-link-exact-active toc-link level3">一、掌握信息源</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xianliaolaoke/daxue-nuli-jisuanji.html#二、专注一门编程语言" class="router-link-active router-link-exact-active toc-link level3">二、专注一门编程语言</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xianliaolaoke/daxue-nuli-jisuanji.html#三、多动手勤实践" class="router-link-active router-link-exact-active toc-link level3">三、多动手勤实践</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xianliaolaoke/daxue-nuli-jisuanji.html#四、早投简历早实习" class="router-link-active router-link-exact-active toc-link level3">四、早投简历早实习</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xianliaolaoke/daxue-nuli-jisuanji.html#五、一点心里话" class="router-link-active router-link-exact-active toc-link level3">五、一点心里话</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><p>过年的时候，在知乎上刷到这样一个话题：<strong>大学计算机系最努力的同学都是如何学习的</strong>？</p><p>我一下子就想起了 10 年前的自己，非清北复交 985 牛逼学历，智商平平，就靠一个人的努力，毕业的时候竟然也拿到了心仪的 offer。</p><p>于是趁着假期连续爆肝了两周，终于肝出了这期视频：希望能给学弟学妹们一点点启发和帮助。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/daxue-nuli-jisuanji-1.jpg" alt=""></p><p>下面是视频链接，感兴趣的小伙伴可以跳过去给二哥刷个三连，谢谢支持了。</p><blockquote><p><a href="https://www.bilibili.com/video/BV1434y117xE/" target="_blank" rel="noopener noreferrer">https://www.bilibili.com/video/BV1434y117xE/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>下面是文字版，发出来给公众号的读者欣赏一下我这完美无缺的学习计划。</p><hr><p>我就是啊。</p><ul><li>晚上 23 点到早上 7 点，睡觉！</li><li>7 点到 7.30，赖床</li><li>7.30 到 8 点，洗漱吃早饭</li><li>8点到 8.10 学习操作系统</li><li>8.10 到 8.20 学习计算机组成原理</li><li>8.20 到 8.30 学习计算机网络</li><li>8.30 到 8.40 学习数据结构</li><li>8.40 到 8.50 刷LeetCode</li><li>8.50 到 9 点 学习数据库</li><li>9 点 到 9 点10分 学习 Java 语言</li><li>9.10 到 12点 刷一会会小姐姐视频，休息下眼睛</li><li>12.00 到 13.00 午饭午休时间</li><li>13.00 到 13.10 学习 go 语言</li><li>13.10 到 13.20 学习 Python 语言</li><li>13.20 到 13.30 学习 C 语言</li><li>13.30 到 18点 打一会会王者，放松下</li><li>18.00 到 19.00 晚饭时间</li><li>19.00 到 19.10 背 Java 八股文</li><li>19.10 到 19.20 刷 JavaGuide 面试题</li><li>19.20 到 23 点 和女朋友聊聊天，维护一下感情</li></ul><p>可以看得出，我这个学习计划安排得非常合理，劳逸结合，不浪费一分一秒。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/daxue-nuli-jisuanji-2.gif" alt=""></p><p>只要你在大学一天，你就有责任、有义务把自己的大学生活过得充实，精彩，别犹豫了，卷起来吧！！！！</p><p>相比其他大部分专业，计算机是真的可以通过努力改变命运的专业，不看成绩，不限出身。</p><h3 id="一、掌握信息源" tabindex="-1"><a class="header-anchor" href="#一、掌握信息源" aria-hidden="true">#</a> 一、掌握信息源</h3><p>我刚上大一的时候，和所有普通的新生一样，面对崭新的大学生活，面对应接不暇的社团，有点茫然不知所措。</p><p>短暂的迷茫后我选择走出寝室，走进图书馆，没想到结识了很多优秀的学长学姐，大学最努力的同学基本上都在这里。我不厌其烦地向他们请教问题，他们都热心帮我解答，不得不承认，优秀的人从来都不吝啬于帮助他人。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/daxue-nuli-jisuanji-3.jpg" alt=""></p><p>我向他们请教的问题有：</p><ul><li>国家奖学金的评比条件有哪些，</li><li>含金量比较高的比赛有哪些，</li><li>大学期间必须考的证书有哪些，</li></ul><p>当同班同学都还在迷茫不知所措的时候，这些重要的信息源让我有了快人一步的资本。</p><h3 id="二、专注一门编程语言" tabindex="-1"><a class="header-anchor" href="#二、专注一门编程语言" aria-hidden="true">#</a> 二、专注一门编程语言</h3><p>刚入门的时候，最大的忌讳就是朝三暮四，这个月学 C语言，下个月学 Python，再下个月学 Java，以至于自己在入门阶段就迷茫了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/daxue-nuli-jisuanji-4.jpeg" alt=""></p><p>我的建议是最好专注于一门编程语言，如果想要走人工智能这条路的话，选 Python 就对了；如果想走算法岗的话，可以选择 C语言，然后再深入学习 C++，之后去把 LeetCode 刷起来；如果想本科毕业就工作赚钱的话，Java 是最优的选择，岗位多，薪资待遇也给力；以后也可以直接转go岗，如果不想那么卷的话，前端也是一个不错的选择。</p><p>专注于一门编程语言，能让你快速积累这门编程语言的学习经验，以后想切换到其他编程语言的时候，也会得心应手，毕竟编程语言之间只是语法上的差异而已，底层的数据结构，关键算法都是相通的。</p><h3 id="三、多动手勤实践" tabindex="-1"><a class="header-anchor" href="#三、多动手勤实践" aria-hidden="true">#</a> 三、多动手勤实践</h3><p>大学四年，我的整体规划是，大一时入门，大二时夯实基础，大三时拼命卷，大四时好好准备校招，能早点出去实习就早点去。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/daxue-nuli-jisuanji-5.jpg" alt=""></p><p>至于学习资料，网上已经有很多免费开源的了，并且绝大多数都非常的优质，只要你肯花时间去筛选和整理。</p><p>这是我自己整理的一套，偏 Java 后端路线的 PDF 书单，在GitHub上也有3。6k的star了，说明很多小伙伴都很认可，包括入门→工具→框架→数据库→并发编程→jvm→性能优化→设计模式→操作系统→计算机网络→数据结构与算法→面试→架构等等，可以说非常的全面和系统。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/daxue-nuli-jisuanji-6.jpg" alt=""></p><p>你也可以拿来作为参考。</p><p>学习的时候记住一点，一定要多动手勤实践，切忌眼高手低。</p><p>很多小伙伴经常找我反馈说自己学完就忘，看的时候明明白白，一到敲代码环节人就傻了。背后的原因其实很简单，就是因为动手少，没有思维记忆，没有肌肉记忆。</p><p>所以说我的建议是代码敲起来，笔记记起来！</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/daxue-nuli-jisuanji-7.gif" alt=""></p><p>记住卖油翁的那句话：无他，唯手熟尔！</p><h3 id="四、早投简历早实习" tabindex="-1"><a class="header-anchor" href="#四、早投简历早实习" aria-hidden="true">#</a> 四、早投简历早实习</h3><p>如果不打算考研的话，一定要早投简历早实习。</p><p>记得大三寒假的时候，很多同学都回家过年了，我一个人选择南下苏州去 ，本以为能找一个实习就很不错了，没想到好几个公司的面试都过了，这给了我很大的信心。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/daxue-nuli-jisuanji-8.jpeg" alt=""></p><p>唐代诗人刘禹锡有句诗是这样写的：<strong>千淘万漉虽辛苦，吹尽狂沙始到金</strong>。</p><p>努力虽好，却也要趁早行动，千万不要一直埋头苦学，该亮剑的时候就要趁早亮。毕竟早就是优势啊。</p><p>好好准备一份简历，然后去投自己心仪的公司，从易到难，不要一开始就投自己最心仪的那个，给自己一个缓冲的机会，积攒一些面试的经验。</p><p>一次面试挂了不要紧，二次面试挂了不要紧，即便十次、二十次也不要气馁，多总结，多反思，经验都是在实战中获得的。</p><h3 id="五、一点心里话" tabindex="-1"><a class="header-anchor" href="#五、一点心里话" aria-hidden="true">#</a> 五、一点心里话</h3><p>这个世界上本没有大神学霸，一切都只是厚积薄发，大学是人生最美好的阶段，日复一日的努力，你终将会“乘风破浪，直挂云帆”。</p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/xianliaolaoke/daxue-nuli-jisuanji.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->编辑此页<span><svg 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class="theme-hope-content"><p>大家好，我是二哥呀！刚好趁着周末，就带老婆、女儿、妹妹一起从洛阳来三门峡和父母小聚了一下。洛阳到三门峡的距离，大概就 11 个小时的骑行时间，开车大概 2 个小时。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/fumutuanju-1.png" alt=""></p><p>我老家是洛阳一个很偏远的农村，处在三门峡和洛阳的交界处，小时候看电视，收不到我们县城的信号，反而能收到隔壁县城的，不知道有多少小伙伴和我有类似的经历哈？</p><p>于是进城务工的大部分村民都会选择三门峡而非洛阳，其中的很大一部分原因就是因为我们村通往三门峡的客车更方便，三门峡的消费水平更低一些。我父母就是这部分农民当中的一个缩影。</p><p>这是我老家院子的一个近况，每次回去，落叶都会堆积一层，仿佛就像是被时间遗忘了的角落。大概是我大学毕业去苏州参加工作后，我们全家就很少在这里住了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/fumutuanju-2.png" alt=""></p><p>最近爆火的电视剧《人世间》里好像有这样一段旁白：“<strong>穷人家的孩子，大抵会分为两类，一类会因为自己的成长环境而感到自卑、自怨，以至于失去自我，丧失了对未来的主动权；一类会不懈努力，尝试去改变命运，赢得这个世界里一片属于自己的天空</strong>。”</p><p>我对自己的评价是，居于两者之间。既有自卑，也会追求超越。</p><p>父亲对我是比较苛刻和严厉的，小时候望子成龙，期望比较高，经常会因为写作业把我打得眼泪直流；后来渐渐失望，以至于父子之间产生误会甚至疏离；近些年又大有改观，对我甚感欣慰：</p><blockquote><p>你终究是通过你的文字和努力帮助到了他人，我不知道你究竟影响了多少人，但至少在我看来，这是有意义的。</p></blockquote><p>公众号后台是能看到数据的，父亲的微信号是阅读最多的前几位。要知道，技术文章他可是看不懂的，看得懂的也就是我现在写的这种类型的小散文。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/fumutuanju-3.png" alt=""></p><p><strong>父亲是自己最忠实的读者之一，想想也是一件挺幸福的事情</strong>。</p><p>我是昨天夜里开车来三门峡的，因为周六女儿要上舞蹈课和英语课，上完就晚上 7 点左右了。夜里开车非常累，因为对面车道和后面倒车镜里的远光灯非常的刺眼，但又不想请假耽误女儿的课程。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/fumutuanju-4.png" alt=""></p><p>快到父母住处的时候，我的眼睛里扫到了一个熟悉的背影，那背影，即便是在漆黑的夜里，即便这夜里只有暗淡的月光和我那不争气的卤素车灯，我也知道，那是父亲的背影。</p><p>原来父亲已经早早的在路边等待了。</p><p><strong>那么一刻，我又一次清楚地感受到了亲情的力量，和团聚的意义</strong>。</p><p>脚已经不由自主地踩了刹车，车速急剧下降，与此同时，我摇下车窗，可没等我喊出那句熟悉的台词，女儿已经欣喜若狂地朝那个伟岸的身影大声地喊出了“爷爷！爷爷！”</p><p>激动得就好像是久别重逢。</p><p>关注我的读者，99%应该都是互联网从业者，而互联网从业者要想获得高薪，首选北上广深杭这样的一线城市是一个不容置疑的选择。那也就意味着，大部分人都只能背井离乡，和父母相隔两地，团聚的日子就剩下那些又堵车又难买票的假期了。</p><p>我一开始去苏州参加工作时，抱定的决心也是一定要在那里定居，我要买房，然后把父母接到那里去住。</p><p>讲真心话，苏州是一个非常宜居的城市，不仅仅是因为那里的环境好，还有那里的人也都非常的 nice，节奏又不是特别的快，非常适合我的性格。以至于离开了这么久，我对那里的一草一木，一山一水，一人一情，依然念念不忘。</p><p><strong>真的不是我矫情，我是个念家的人。打小就喜欢待在父母身边，成家后，更是不愿意出远门</strong>。前段时间，阿里云社区的一个负责人邀请我去做无影评测大赛颁奖典礼的嘉宾，被我各种理由推掉了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/fumutuanju-5.png" alt=""></p><p>一想到要离开家，又是只身一人，我就好像脚下生了根，寸步难移。</p><p>对于我来说，敲点代码，写点文字，守护好父母，守护好妻女，守护好妹妹，守护好和读者朋友们之间的友谊，我就觉得人生是充实而有意义的。</p><p>也希望，所有的读者朋友们，都能有一个愉快而又温馨的周末。我们下期见~</p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a 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00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月8日</span><meta property="datePublished" content="2022-03-08T07:51:54.000Z"></span><!----><!----><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 4 分钟</span><meta property="timeRequired" content="PT4M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><p>大家好，我是二哥呀！刚好趁着周末，就带老婆、女儿、妹妹一起从洛阳来三门峡和父母小聚了一下。洛阳到三门峡的距离，大概就 11 个小时的骑行时间，开车大概 2 个小时。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/fumutuanju-1.png" alt=""></p><p>我老家是洛阳一个很偏远的农村，处在三门峡和洛阳的交界处，小时候看电视，收不到我们县城的信号，反而能收到隔壁县城的，不知道有多少小伙伴和我有类似的经历哈？</p><p>于是进城务工的大部分村民都会选择三门峡而非洛阳，其中的很大一部分原因就是因为我们村通往三门峡的客车更方便，三门峡的消费水平更低一些。我父母就是这部分农民当中的一个缩影。</p><p>这是我老家院子的一个近况，每次回去，落叶都会堆积一层，仿佛就像是被时间遗忘了的角落。大概是我大学毕业去苏州参加工作后，我们全家就很少在这里住了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/fumutuanju-2.png" alt=""></p><p>最近爆火的电视剧《人世间》里好像有这样一段旁白：“<strong>穷人家的孩子，大抵会分为两类，一类会因为自己的成长环境而感到自卑、自怨，以至于失去自我，丧失了对未来的主动权；一类会不懈努力，尝试去改变命运，赢得这个世界里一片属于自己的天空</strong>。”</p><p>我对自己的评价是，居于两者之间。既有自卑，也会追求超越。</p><p>父亲对我是比较苛刻和严厉的，小时候望子成龙，期望比较高，经常会因为写作业把我打得眼泪直流；后来渐渐失望，以至于父子之间产生误会甚至疏离；近些年又大有改观，对我甚感欣慰：</p><blockquote><p>你终究是通过你的文字和努力帮助到了他人，我不知道你究竟影响了多少人，但至少在我看来，这是有意义的。</p></blockquote><p>公众号后台是能看到数据的，父亲的微信号是阅读最多的前几位。要知道，技术文章他可是看不懂的，看得懂的也就是我现在写的这种类型的小散文。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/fumutuanju-3.png" alt=""></p><p><strong>父亲是自己最忠实的读者之一，想想也是一件挺幸福的事情</strong>。</p><p>我是昨天夜里开车来三门峡的，因为周六女儿要上舞蹈课和英语课，上完就晚上 7 点左右了。夜里开车非常累，因为对面车道和后面倒车镜里的远光灯非常的刺眼，但又不想请假耽误女儿的课程。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/fumutuanju-4.png" alt=""></p><p>快到父母住处的时候，我的眼睛里扫到了一个熟悉的背影，那背影，即便是在漆黑的夜里，即便这夜里只有暗淡的月光和我那不争气的卤素车灯，我也知道，那是父亲的背影。</p><p>原来父亲已经早早的在路边等待了。</p><p><strong>那么一刻，我又一次清楚地感受到了亲情的力量，和团聚的意义</strong>。</p><p>脚已经不由自主地踩了刹车，车速急剧下降，与此同时，我摇下车窗，可没等我喊出那句熟悉的台词，女儿已经欣喜若狂地朝那个伟岸的身影大声地喊出了“爷爷！爷爷！”</p><p>激动得就好像是久别重逢。</p><p>关注我的读者，99%应该都是互联网从业者，而互联网从业者要想获得高薪，首选北上广深杭这样的一线城市是一个不容置疑的选择。那也就意味着，大部分人都只能背井离乡，和父母相隔两地，团聚的日子就剩下那些又堵车又难买票的假期了。</p><p>我一开始去苏州参加工作时，抱定的决心也是一定要在那里定居，我要买房，然后把父母接到那里去住。</p><p>讲真心话，苏州是一个非常宜居的城市，不仅仅是因为那里的环境好，还有那里的人也都非常的 nice，节奏又不是特别的快，非常适合我的性格。以至于离开了这么久，我对那里的一草一木，一山一水，一人一情，依然念念不忘。</p><p><strong>真的不是我矫情，我是个念家的人。打小就喜欢待在父母身边，成家后，更是不愿意出远门</strong>。前段时间，阿里云社区的一个负责人邀请我去做无影评测大赛颁奖典礼的嘉宾，被我各种理由推掉了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xianliaolaoke/fumutuanju-5.png" alt=""></p><p>一想到要离开家，又是只身一人，我就好像脚下生了根，寸步难移。</p><p>对于我来说，敲点代码，写点文字，守护好父母，守护好妻女，守护好妹妹，守护好和读者朋友们之间的友谊，我就觉得人生是充实而有意义的。</p><p>也希望，所有的读者朋友们，都能有一个愉快而又温馨的周末。我们下期见~</p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/xianliaolaoke/fumutuanju.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 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clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->电子信息工程最好的出路的是什么？</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 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class="router-link-active router-link-exact-active toc-link level2">一、IC</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexijianyi/electron-information-engineering.html#二、计算机专业" class="router-link-active router-link-exact-active toc-link level2">二、计算机专业</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/xuexijianyi/electron-information-engineering.html#一、java-语言基础" class="router-link-active router-link-exact-active toc-link level3">一、Java 语言基础</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexijianyi/electron-information-engineering.html#二、开发框架" class="router-link-active router-link-exact-active toc-link level3">二、开发框架</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexijianyi/electron-information-engineering.html#三、数据库" class="router-link-active router-link-exact-active toc-link level3">三、数据库</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexijianyi/electron-information-engineering.html#四、计算机组成原理" class="router-link-active router-link-exact-active toc-link level3">四、计算机组成原理</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexijianyi/electron-information-engineering.html#五、数据结构与算法" class="router-link-active router-link-exact-active toc-link level3">五、数据结构与算法</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexijianyi/electron-information-engineering.html#六、操作系统" class="router-link-active router-link-exact-active toc-link level3">六、操作系统</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexijianyi/electron-information-engineering.html#三、嵌入式" class="router-link-active router-link-exact-active toc-link level2">三、嵌入式</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="电子信息工程最好的出路的是什么" tabindex="-1"><a class="header-anchor" href="#电子信息工程最好的出路的是什么" aria-hidden="true">#</a> 电子信息工程最好的出路的是什么？</h1><p><strong>最好的出路，在我看来是读研，然后做 IC；如果不想读研，想早点赚钱，建议转计算机专业；如果还想折中，考虑做嵌入式</strong>。</p><p>说下我了解到的。</p><h2 id="一、ic" tabindex="-1"><a class="header-anchor" href="#一、ic" aria-hidden="true">#</a> 一、IC</h2><p>IC 就是半导体元件产品的统称，主要分为数字 IC 和模拟 IC。数字 IC 就是传递、加工、处理数字信号的 IC；模拟 IC 是处理连续性的光、声音、速度、温度等自然模拟信号的 IC。</p><p>数字电路 IC 处理的是数字信号的器件，比如 CPU、逻辑电路等；模拟电路 IC 处理的是提供模拟信号的器件，比如运算放大器、线性稳压器。</p><p>模拟 IC 的厂商国内外知名的不多，比如说国外的德州仪器，国内的艾为电子。</p><p>反观数字 IC，国内外知名公司真不少，比如说 nvdia、AMD、中兴、海思等。</p><p>从入门门槛上来看，模拟比数字的门槛高一些，模拟如果想做的好一点，研究生学历是必须的，读博更好；数字门槛也不能说低，如果足够优秀，本科也是可以顺利就职的，版图岗位的要求更低一些，只有要数电、模电的基础，对大专生也是比较友好的。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexijianyi/electron-information-engineering-30e29fba-9b5d-40da-bda1-dbd0e81b8247.png" alt=""></p><p>至于薪资的话，如果是名校出身的科班生，50 万的薪资可以说羡煞旁人了。</p><h2 id="二、计算机专业" tabindex="-1"><a class="header-anchor" href="#二、计算机专业" aria-hidden="true">#</a> 二、计算机专业</h2><p>从技术应用的角度来看，在相当长的时间里，社会对计算机从业人员的缺口都非常大。因为，各行各业都需要计算机专业的人员参与进来，进行数字化的改造。<strong>举个例子，我在某 2 线城市的 5 年计划中，看到这样一条：</strong></p><p>未来5年内，借助互联网技术，着重提升群众办事的满意度，从原来“只跑一次”，变成“一次也不用跑”，打造“24小时不打烊”的政府窗口。</p><p><strong>大家想一下，按这个思路，各行各业，全国上下铺开，是多么大的一个工程量，对计算机从业人员的需求量，可想而知。</strong></p><p><strong>另外，像专业领域的软件，完全被国外吊打。</strong></p><ul><li>AutoCAD、solidworks、proe、creo等3维设计软件，实体制造业，包括家电、家居、装修、机械、服装设备、各种设备制造、生产线制造</li><li>Adobe家族，设计、阅读行业，设计行业</li><li>ansys、fluent、MATLAB，结构应力分析、流体分析，所有有中高端实体产业、大型企业、科研所、尖端行业</li><li>CATIA 汽车行业、新能源行业</li><li>protel，电气行业，电路设计等等，涉及所有通电的数码设备，小到耳机，大到手机、笔记本显示器、家电等等</li></ul><p><strong>这些专业领域的软件，就需要更多计算机专业的人员参与进来，并且坚持做 5-10 年才有可能赶得上。</strong></p><p>所以，电子信息工程专业转计算机专业也是一个非常好的选择。</p><p>计算机行业对于普通人来说，仍然是改变命运的绝好机会。相对来说，传统行业更注重资源，背景、人脉尤其重要，普通出身的人想要晋升，难度相当于爬 90 度的梯子。当然了，如果能把传统行业和互联网结合起来，那一定也能创造出巨大的价值。</p><p>古人云：两害相权取其轻。</p><p>往下看，是待遇低微、前途灰暗、血肉磨坊般的传统工科；</p><p>往上看，是门槛高、依赖家庭资源、依赖学校出身的金、法、医；</p><p>中间的计算机，算是这个时代给予贫寒子弟仅有的一点温柔。反正我就是靠着计算机专业完成逆袭的。晒张图，这是我的家乡，虽然树很多、空气也很新鲜，但确实比较穷。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexijianyi/electron-information-engineering-4e3f8c93-9df5-48dd-9824-79005d5c5518.png" alt=""></p><p>我之所以能够逆袭成功，因素有很多，但我想以下这三点非常重要：</p><ul><li>父母的支持</li><li>自己的努力</li><li><strong>选择了计算机专业</strong></li></ul><p><strong>这里也分享一套非常完整的计算机必读的经典书籍，对计算机专业的同学会有非常大的帮助，这也是我十多年编程生涯里留下的宝藏</strong>：<a href="https://tobebetterjavaer.com/download/java.html" target="_blank" rel="noopener noreferrer">计算机经典书单<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><p><strong>里面的书单真的非常 nice，不管是学习编程的新手，还是工作多年的老手，应该都很有帮助</strong>：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexijianyi/electron-information-engineering-e40c4215-3078-42b3-8ab6-fe84c34d0a07.jpg" alt=""></p><p>戳：<a href="https://tobebetterjavaer.com/download/java.html" target="_blank" rel="noopener noreferrer">计算机必读经典书单（可 download）！<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><p>这里重申一下我学习计算机的理论观点吧，如果要转计算机的话，我想对你快速建立起自己的知识体系很有帮助！</p><p>如果你要学习物理，我推荐你顺着物理的发展史学习，先学习牛顿的经典物理，再学习热力学、电磁学，然后学习相对论、量子力学这些彻底推翻经典物理的，最后学习电动力学这种硬核的。</p><p>整个学习过程，是自底向上的。但是学计算机，这样行不通。</p><p>先学习电路，然后学习冯诺依曼结构，造一台计算机？接着再学习如何用汇编写个 mini os？接着学习如何写一个简易版的编译器？最后再学习高级编程语言，比如说 Java、Python？</p><p>显然这样是行不通的！<strong>计算机的学习最好是自顶向下</strong>。</p><p>什么是顶？我想一门高级的编程语言就是，比如说 Java、C++、Python！</p><p>当你学习到 Java 并发编程中的“原子性”、“同步”、“异步”、“进程”、“内存分配”这些概念的时候，你自然而然会产生很多疑问，然后就会去学习计算机组成原理、操作系统，然后你的一系列问题就会逐渐被解决。</p><p>当你发现，用 Java 实现某个业务需求时，人家的算法实现比你快得多，你自然会好奇，为什么会这样？然后你发现人家用的数据结构和你的不同，然后你就会去学习数据结构，接着了解一些高效的算法，比如动态规划等。</p><p><strong>那么接下来，再来说说计算机专业的学习路线吧，需要的学习路线的同学可以 mark 了！非常硬核，值得收藏和点赞。</strong></p><h3 id="一、java-语言基础" tabindex="-1"><a class="header-anchor" href="#一、java-语言基础" aria-hidden="true">#</a> 一、Java 语言基础</h3><p>初学者可以到通过《<a href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">Java 程序员进阶之路<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>》进行学习，也就是本站，这是一个风趣幽默、通俗易懂的 Java 教程，对 Java 初学者极度友好和舒适，内容包括但不限于 Java 语法、Java 集合框架、Java IO、Java 并发编程、Java 虚拟机等核心知识点。</p><blockquote><p>更详细的学习路线戳：<a href="https://tobebetterjavaer.com/xuexiluxian/java/yitiaolong.html" target="_blank" rel="noopener noreferrer">https://tobebetterjavaer.com/xuexiluxian/java/yitiaolong.html<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><h3 id="二、开发框架" tabindex="-1"><a class="header-anchor" href="#二、开发框架" aria-hidden="true">#</a> 二、开发框架</h3><p>可能很多人会对开发框架嗤之以鼻，感觉学这个没多大用处，提升不了你的技术功底。但是呢，如果你想做练手项目，没有开发框架的帮助，很难。</p><p>Java 之所以流行，很重要的一部分原因就是拥有 Spring 系列框架这个大杀器，包括 SSM（Spring+SpringMVC+MyBatis）、Spring Boot、Spring Cloud。</p><p>我们只是不应该停留在只会用的层面上，要懂背后的原理。说一千道一万，Spring 的核心就两个概念：AOP、IoC。</p><p>AOP（Aspect-Oriented Programming），也就是面向切面编程，能够将那些与业务无关，却为业务模块所共同调用的逻辑或责任（例如事务处理、日志管理、权限控制等）封装起来，便于减少系统的重复代码，降低模块间的耦合度，并有利于未来的可拓展性和可维护性。</p><p>IoC（Inverse of Control），也就是控制反转，是一种设计思想，就是将原本在程序中手动创建对象的控制权，交由 Spring 框架来管理。</p><p>先学习 SSM，再学习 Spring Boot。Spring Boot 的出现，并不意味着 Spring 和 SpringMVC 已经过时了，从设计目的上来说，Spring Boot 只是实现了 Spring 的自动装配，降低了项目搭建的难度。</p><p>从技术角度来说，Spring Boot 的底层依然是 Spring 的核心机制，也就是 AOP 和 IoC，Spring Boot 只是一个承载者。在我看来，学习 Spring 的正确路径应该是 Spring -&gt; Servlet -&gt; Spring MVC -&gt; Spring Boot。</p><h3 id="三、数据库" tabindex="-1"><a class="header-anchor" href="#三、数据库" aria-hidden="true">#</a> 三、数据库</h3><p>增删改查，增删改查，要想做一名只会 CRUD 的程序员，数据库这块是逃不掉的。不过，这里就不重点说了，推荐一些资源给大家。</p><p>小破站上的三个视频。</p><ul><li>SQL：<a href="https://www.bilibili.com/video/BV1UE41147KC" target="_blank" rel="noopener noreferrer">https://www.bilibili.com/video/BV1UE41147KC<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li>MySQL：<a href="https://www.bilibili.com/video/BV12b411K7Zu" target="_blank" rel="noopener noreferrer">https://www.bilibili.com/video/BV12b411K7Zu<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li>Redis：<a href="https://www.bilibili.com/video/BV1S54y1R7SB" target="_blank" rel="noopener noreferrer">https://www.bilibili.com/video/BV1S54y1R7SB<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul><p>四本书。</p><ul><li>《SQL 必知必会》</li><li>《高性能 MySQL》</li><li>《MySQL 技术内幕-InnoDB 存储引擎》</li><li>《Redis 深入历险核心原理与应用实战》</li></ul><h3 id="四、计算机组成原理" tabindex="-1"><a class="header-anchor" href="#四、计算机组成原理" aria-hidden="true">#</a> 四、计算机组成原理</h3><p>计算机是由 CPU、内存、输入输出设备，这些硬件组成的，但我们程序员，往往从事的是软件开发的工作，怎么在硬件和软件之间搭起一座桥梁呢？</p><p>答案就是学习计算机组成原理。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexijianyi/electron-information-engineering-5270d8c0-5e03-4a06-924c-c9a8d25dd446.jpg" alt=""></p><p>计算机组成原理的知识点可以拆分为四个部分：</p><ul><li>计算机的基本组成硬件</li><li>计算机的指令和计算</li><li>处理器涉及</li><li>存储器和 IO 设备</li></ul><p>按照冯诺依曼的体系结构，计算机分为运算器、控制器、存储器、输入输出设备；我们编写的代码，要想在计算机上运行，就需要通过编译器转成汇编代码，再经过汇编器转成一条条指令，这些指令的执行，是由控制器来完成的。</p><p><strong>计算机组成原理该怎么学呢</strong>？</p><p>如果英语功底非常不错的话，安利一门 Coursera 上的课程，从与非门到俄罗斯方块，简单来说，这门课会教你怎么从与非门开始造一台计算机。</p><blockquote><p>地址：<a href="https://www.coursera.org/learn/build-a-computer%E2%80%8Bwww.coursera.org/learn/build-a-computer" target="_blank" rel="noopener noreferrer">https://www.coursera.org/learn/build-a-computer​www.coursera.org/learn/build-a-computer<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>这门课的视频拍的那叫一个优质，虽然没有中文翻译，但视频下方的字幕会有节奏的移动。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexijianyi/electron-information-engineering-a5f13f0d-c0e1-486a-933a-7bfa81983a6c.jpg" alt=""></p><p>国内的推荐哈工大的这门视频课，整体评价非常高（建议 1.5 倍速食用），戳：<a href="https://www.bilibili.com/video/BV1WW411Q7PF" target="_blank" rel="noopener noreferrer">计算机组成原理（唐朔飞）_哔哩哔哩_bilibili<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><h3 id="五、数据结构与算法" tabindex="-1"><a class="header-anchor" href="#五、数据结构与算法" aria-hidden="true">#</a> 五、数据结构与算法</h3><p>可能有人会觉得：就算不懂数据结构与算法，照样可以把 Java API、开发框架用得飞起？</p><p>但这里我想表达的是：</p><p><strong>1）数据结构与算法是很多大厂筛选人才的要素之一</strong>。</p><p>这是因为校招的时候，参加面试的学生大多数都是没有实际项目经验的，公司只能通过考察这些基础知识来筛选。</p><p>大厂不怕你没有项目经验，而怕你没有长期发展的潜力。所以，很多参加校招的同学，在面试前都会疯狂刷题的，至少会突击个 100 道左右的题目。</p><p><strong>2）实际工作当中肯定是会用到的。</strong></p><p>举个例子，存储某个业务数据时，你打算用 ArrayList 还是 LinkedList，它们底层用的是哪种数据结构，增删改查上有哪些优缺点？</p><p>再比如，Redis 中的有序集合是用什么数据结构实现的？为什么要用跳表二不是二叉树呢？</p><p>不懂数据结构和算法，行得通吗？</p><p><strong>3）掌握了数据结构与算法，对阅读源码会有很大的帮助。</strong></p><p>因为很多时候，源码当中都会考量到不同数据结构之间的优点和缺点。</p><p>你比如说，HashMap 为什么在链表长度大于 8 的时候将其转为红黑树？为什么不能是二叉树？</p><p><strong>那数据结构与算法该怎么学习呢？</strong></p><p>我画了一张图，里面几乎涵盖了所有数据结构与算法书籍中都会讲到的知识点。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexijianyi/electron-information-engineering-46294124-8e8f-4d2e-ac48-f68a1be9b2ac.jpg" alt=""></p><p>如果英语功底不错的话，推荐国外的 MIT 6.006，是经典的数据结构和算法入门课程，涉及到排序、哈希、图论、动态规划。</p><p><a href="https://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-006-introduction-to-algorithms-fall-2011/" target="_blank" rel="noopener noreferrer">https://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-006-introduction-to-algorithms-fall-2011/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><p>国内的推荐浙江大学的一个的课程，很系统很经典，适合小白入门。</p><p><a href="https://www.bilibili.com/video/BV1JW411i731" target="_blank" rel="noopener noreferrer">数据结构-浙江大学_哔哩哔哩_bilibili<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><p>至于练习，推荐到 LeetCode 或者牛客网上刷题吧，上面的问题往往有趣且带有良好的解法和讨论。此外，在竞争日益激烈的软件行业，这些问题可以帮助你评估自己应对技术面试中常见问题的能力。</p><p>我的心得就是简单粗暴：从易到难，一遍一遍地刷，尽量使用自己熟悉的编程语言，比如说 Java 程序员尽量用 Java 来解题，这样刷题的幸福感也会提升很大一截。</p><p>如果不是天赋异禀，不要怕，一开始就是抄题，先把别人的解题思路照着敲出来。刷的题多了，尽量控制一下刷题的时间，掐个点，不能让自己一直想、一直写下去，如果半个小时没有解出来，就果断放弃，去背别人的答案，不要觉得不好意思，等到真的熟了，再去想自己的解题思路。</p><blockquote><p>更详细的学习路线戳：<a href="https://tobebetterjavaer.com/xuexiluxian/algorithm.html" target="_blank" rel="noopener noreferrer">https://tobebetterjavaer.com/xuexiluxian/algorithm.html<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><h3 id="六、操作系统" tabindex="-1"><a class="header-anchor" href="#六、操作系统" aria-hidden="true">#</a> 六、操作系统</h3><p>操作系统是管理计算机硬件和软件资源的程序，是计算机的基石。</p><p>操作系统负责的工作有：管理设备、文件读写、控制进程、管理内存等等，算是所有软件中的老大，掌握着生杀大权。推荐的学习资料有《现代操作系统》、《深入理解计算机系统》这两本书。</p><p>考过研的同学应该知道《深入理解计算机系统》这本书是必读的，我自己最近又买了一本新的，算是我读的第二遍了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexijianyi/electron-information-engineering-52358273-5b8b-416a-b466-986b5f3ee96a.jpg" alt=""></p><p>操作系统中的很多思想和经典算法，都可以在日常开发使用的各种工具或者框架中找到影子。</p><p>比如说 Redis 和操作系统的高速缓存就很像，Redis 是用来解决程序处理速度和访问 MySQL 速度不对等的问题，而内存就是用来解决 CPU 处理速度和访问磁盘等外存速度不对等的问题。</p><p>像操作系统，国内通常会考 PPT 上那些需要死记硬背的知识点，而国外往往会要求实现一个简单的操作系统内核。</p><p>如果英语功底非常不错的话，推荐国外的 MIT6.828，是一门公认的硬核课程，是理论与实践相结合的经典。建议有一些 C语言语言的基础后，再来看这门课程，一定会大有所获。只要你跟着项目一步一步走，就能实现一个简单的操作系统内核。</p><p>课程地址：<a href="https://pdos.csail.mit.edu/6.828/2018/schedule.html" target="_blank" rel="noopener noreferrer">6.828 / Fall 2018<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><p>操作系统应该提供的功能：</p><ol><li>多进程支持</li><li>进程间隔离</li><li>受控制的进程间通信</li></ol><p>内核（<em>kernel</em>）是操作系统的核心，它是一种为运行的程序提供服务的特殊程序。每个运行着的程序叫做进程，每个进程的内存中存储着指令、数据和堆栈。一个计算机可以拥有多个进程，但是只能有一个内核。</p><p>每当进程需要调用内核时，它会触发一个<em>system call</em>（系统调用），system call进入内核执行相应的服务然后返回。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexijianyi/electron-information-engineering-b7db672b-7a5a-443f-8a4d-5a8e1d65886c.jpg" alt=""></p><p>网友在学习这门课程的时候做的笔记：<a href="https://fanxiao.tech/posts/MIT-6S081-notes/" target="_blank" rel="noopener noreferrer">MIT 6.S081 Lecture Notes<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，大家可以作为参考。</p><p>国内的「清华大学公开课：操作系统」口碑也相当的不错。</p><p><a href="https://open.163.com/newview/movie/courseintro%3Fnewurl%3DME1NSA351" target="_blank" rel="noopener noreferrer">清华大学公开课：操作系统<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><p>还有哈工大的操作系统课：</p><p><a href="https://www.bilibili.com/video/av17036347" target="_blank" rel="noopener noreferrer">操作系统哈尔滨工业大学李治军老师_哔哩哔哩_bilibili<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><p>以“如何给一个拥有单核 CPU、内存、磁盘、键盘和显示器的基本计算机配备一个可实际运转的操作系统”这一基本问题作为主线，分为四大块：</p><ul><li>操作系统基础</li><li>进程与线程</li><li>内存管理</li><li>设备驱动与文件系统</li></ul><p>下图是课程的封面，一个简易版的操作系统，和我们当前使用操作系统界面比起来，显然丑露无比，但它能让你体会到快乐——一种真正地学到了本领的快乐。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexijianyi/electron-information-engineering-cdccae94-aca8-4e88-b241-0b6d95dee5f9.jpg" alt=""></p><blockquote><p>更详细的学习路线戳：<a href="https://tobebetterjavaer.com/xuexiluxian/os.html" target="_blank" rel="noopener noreferrer">https://tobebetterjavaer.com/xuexiluxian/os.html<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>借这个机会，我希望把多年来整理的硬核学习资料分享出来，帮助到更多小伙伴，包括<strong>编程语言的入门教程，操作系统、计算机网络、数据结构与算法这种偏基础的硬核知识，以及能“吊打”面试官的八股文：</strong></p><p>直接长按识别/扫描下方二维码，关注后回复 「<strong>00</strong>」 下载这份 PDF 吧：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongzhonghao.png" alt="扫码关注后回复「00」关键字"></p><h2 id="三、嵌入式" tabindex="-1"><a class="header-anchor" href="#三、嵌入式" aria-hidden="true">#</a> 三、嵌入式</h2><p>嵌入式可以进一步细分为嵌入式硬件和嵌入式软件。</p><p>嵌入式硬件工程师逼近要求具备硬件工程师的基本技能，还必须完成部分软件工程师的工作，比如说能对底层驱动的嵌入式操作系统进行裁剪、移植。</p><p>嵌入式硬件工程师的主要职责是为产品设计硬件电路原理图、PCB 板（印刷电路板），选择合适的元器件，焊接调试硬件电路板，保证硬件电路板的可靠性、稳定性和抗干扰能力。</p><p>一个资深的嵌入式硬件工程师的年薪在 15-30 万左右。需要有非常扎实的理论知识，以及高频 CPU、多层 PCB 板的设计经验。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexijianyi/electron-information-engineering-34380fff-fcbd-4d1a-805d-72d38a1d8834.png" alt=""></p><p>嵌入式软件工程师指在 wince、linux 等嵌入式操作系统下进行用户应用软件开发的人员，硬件平台有手机、pad 等；开发工具有 wince 下的 evc，Linux 下的 QT 等。</p><p>嵌入式软件工程师的主要职责是根据产品的功能需求设计出好的软件，让硬件工作起来。一般情况下，软件工程师的需求量更大一些。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexijianyi/electron-information-engineering-5e3615e1-54c3-41a2-beca-97fcac8bc2cb.png" alt=""></p><p>一个资深的嵌入式软件工程师的年薪也在 15-30 万左右。要熟练掌握 C/C++，熟练使用CortexM4系列单片机、RTOS(FreeRTOS, UcosII，RT-thread)等。</p><p><strong>希望能给大家提供一点点帮助和启发~</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/xuexijianyi/electron-information-engineering.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 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router-link-exact-active nav-link sidebar-link heading" aria-label="六、操作系统"><!---->六、操作系统<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/xuexijianyi/electron-information-engineering.html#三、嵌入式" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="三、嵌入式"><!---->三、嵌入式<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li></ul></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->电子信息工程最好的出路的是什么？</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年4月5日</span><meta property="datePublished" content="2022-04-05T10:11:35.000Z"></span><span 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18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category2" role>学习资源</li><meta property="articleSection" content="学习资源"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 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213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 17 分钟</span><meta property="timeRequired" content="PT17M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/xuexijianyi/electron-information-engineering.html#一、ic" class="router-link-active router-link-exact-active toc-link level2">一、IC</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexijianyi/electron-information-engineering.html#二、计算机专业" class="router-link-active router-link-exact-active toc-link level2">二、计算机专业</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/xuexijianyi/electron-information-engineering.html#一、java-语言基础" class="router-link-active router-link-exact-active toc-link level3">一、Java 语言基础</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexijianyi/electron-information-engineering.html#二、开发框架" class="router-link-active router-link-exact-active toc-link level3">二、开发框架</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexijianyi/electron-information-engineering.html#三、数据库" class="router-link-active router-link-exact-active toc-link level3">三、数据库</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexijianyi/electron-information-engineering.html#四、计算机组成原理" class="router-link-active router-link-exact-active toc-link level3">四、计算机组成原理</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexijianyi/electron-information-engineering.html#五、数据结构与算法" class="router-link-active router-link-exact-active toc-link level3">五、数据结构与算法</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexijianyi/electron-information-engineering.html#六、操作系统" class="router-link-active router-link-exact-active toc-link level3">六、操作系统</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexijianyi/electron-information-engineering.html#三、嵌入式" class="router-link-active router-link-exact-active toc-link level2">三、嵌入式</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="电子信息工程最好的出路的是什么" tabindex="-1"><a class="header-anchor" href="#电子信息工程最好的出路的是什么" aria-hidden="true">#</a> 电子信息工程最好的出路的是什么？</h1><p><strong>最好的出路，在我看来是读研，然后做 IC；如果不想读研，想早点赚钱，建议转计算机专业；如果还想折中，考虑做嵌入式</strong>。</p><p>说下我了解到的。</p><h2 id="一、ic" tabindex="-1"><a class="header-anchor" href="#一、ic" aria-hidden="true">#</a> 一、IC</h2><p>IC 就是半导体元件产品的统称，主要分为数字 IC 和模拟 IC。数字 IC 就是传递、加工、处理数字信号的 IC；模拟 IC 是处理连续性的光、声音、速度、温度等自然模拟信号的 IC。</p><p>数字电路 IC 处理的是数字信号的器件，比如 CPU、逻辑电路等；模拟电路 IC 处理的是提供模拟信号的器件，比如运算放大器、线性稳压器。</p><p>模拟 IC 的厂商国内外知名的不多，比如说国外的德州仪器，国内的艾为电子。</p><p>反观数字 IC，国内外知名公司真不少，比如说 nvdia、AMD、中兴、海思等。</p><p>从入门门槛上来看，模拟比数字的门槛高一些，模拟如果想做的好一点，研究生学历是必须的，读博更好；数字门槛也不能说低，如果足够优秀，本科也是可以顺利就职的，版图岗位的要求更低一些，只有要数电、模电的基础，对大专生也是比较友好的。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexijianyi/electron-information-engineering-30e29fba-9b5d-40da-bda1-dbd0e81b8247.png" alt=""></p><p>至于薪资的话，如果是名校出身的科班生，50 万的薪资可以说羡煞旁人了。</p><h2 id="二、计算机专业" tabindex="-1"><a class="header-anchor" href="#二、计算机专业" aria-hidden="true">#</a> 二、计算机专业</h2><p>从技术应用的角度来看，在相当长的时间里，社会对计算机从业人员的缺口都非常大。因为，各行各业都需要计算机专业的人员参与进来，进行数字化的改造。<strong>举个例子，我在某 2 线城市的 5 年计划中，看到这样一条：</strong></p><p>未来5年内，借助互联网技术，着重提升群众办事的满意度，从原来“只跑一次”，变成“一次也不用跑”，打造“24小时不打烊”的政府窗口。</p><p><strong>大家想一下，按这个思路，各行各业，全国上下铺开，是多么大的一个工程量，对计算机从业人员的需求量，可想而知。</strong></p><p><strong>另外，像专业领域的软件，完全被国外吊打。</strong></p><ul><li>AutoCAD、solidworks、proe、creo等3维设计软件，实体制造业，包括家电、家居、装修、机械、服装设备、各种设备制造、生产线制造</li><li>Adobe家族，设计、阅读行业，设计行业</li><li>ansys、fluent、MATLAB，结构应力分析、流体分析，所有有中高端实体产业、大型企业、科研所、尖端行业</li><li>CATIA 汽车行业、新能源行业</li><li>protel，电气行业，电路设计等等，涉及所有通电的数码设备，小到耳机，大到手机、笔记本显示器、家电等等</li></ul><p><strong>这些专业领域的软件，就需要更多计算机专业的人员参与进来，并且坚持做 5-10 年才有可能赶得上。</strong></p><p>所以，电子信息工程专业转计算机专业也是一个非常好的选择。</p><p>计算机行业对于普通人来说，仍然是改变命运的绝好机会。相对来说，传统行业更注重资源，背景、人脉尤其重要，普通出身的人想要晋升，难度相当于爬 90 度的梯子。当然了，如果能把传统行业和互联网结合起来，那一定也能创造出巨大的价值。</p><p>古人云：两害相权取其轻。</p><p>往下看，是待遇低微、前途灰暗、血肉磨坊般的传统工科；</p><p>往上看，是门槛高、依赖家庭资源、依赖学校出身的金、法、医；</p><p>中间的计算机，算是这个时代给予贫寒子弟仅有的一点温柔。反正我就是靠着计算机专业完成逆袭的。晒张图，这是我的家乡，虽然树很多、空气也很新鲜，但确实比较穷。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexijianyi/electron-information-engineering-4e3f8c93-9df5-48dd-9824-79005d5c5518.png" alt=""></p><p>我之所以能够逆袭成功，因素有很多，但我想以下这三点非常重要：</p><ul><li>父母的支持</li><li>自己的努力</li><li><strong>选择了计算机专业</strong></li></ul><p><strong>这里也分享一套非常完整的计算机必读的经典书籍，对计算机专业的同学会有非常大的帮助，这也是我十多年编程生涯里留下的宝藏</strong>：<a href="https://tobebetterjavaer.com/download/java.html" target="_blank" rel="noopener noreferrer">计算机经典书单<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><p><strong>里面的书单真的非常 nice，不管是学习编程的新手，还是工作多年的老手，应该都很有帮助</strong>：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexijianyi/electron-information-engineering-e40c4215-3078-42b3-8ab6-fe84c34d0a07.jpg" alt=""></p><p>戳：<a href="https://tobebetterjavaer.com/download/java.html" target="_blank" rel="noopener noreferrer">计算机必读经典书单（可 download）！<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><p>这里重申一下我学习计算机的理论观点吧，如果要转计算机的话，我想对你快速建立起自己的知识体系很有帮助！</p><p>如果你要学习物理，我推荐你顺着物理的发展史学习，先学习牛顿的经典物理，再学习热力学、电磁学，然后学习相对论、量子力学这些彻底推翻经典物理的，最后学习电动力学这种硬核的。</p><p>整个学习过程，是自底向上的。但是学计算机，这样行不通。</p><p>先学习电路，然后学习冯诺依曼结构，造一台计算机？接着再学习如何用汇编写个 mini os？接着学习如何写一个简易版的编译器？最后再学习高级编程语言，比如说 Java、Python？</p><p>显然这样是行不通的！<strong>计算机的学习最好是自顶向下</strong>。</p><p>什么是顶？我想一门高级的编程语言就是，比如说 Java、C++、Python！</p><p>当你学习到 Java 并发编程中的“原子性”、“同步”、“异步”、“进程”、“内存分配”这些概念的时候，你自然而然会产生很多疑问，然后就会去学习计算机组成原理、操作系统，然后你的一系列问题就会逐渐被解决。</p><p>当你发现，用 Java 实现某个业务需求时，人家的算法实现比你快得多，你自然会好奇，为什么会这样？然后你发现人家用的数据结构和你的不同，然后你就会去学习数据结构，接着了解一些高效的算法，比如动态规划等。</p><p><strong>那么接下来，再来说说计算机专业的学习路线吧，需要的学习路线的同学可以 mark 了！非常硬核，值得收藏和点赞。</strong></p><h3 id="一、java-语言基础" tabindex="-1"><a class="header-anchor" href="#一、java-语言基础" aria-hidden="true">#</a> 一、Java 语言基础</h3><p>初学者可以到通过《<a href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">Java 程序员进阶之路<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>》进行学习，也就是本站，这是一个风趣幽默、通俗易懂的 Java 教程，对 Java 初学者极度友好和舒适，内容包括但不限于 Java 语法、Java 集合框架、Java IO、Java 并发编程、Java 虚拟机等核心知识点。</p><blockquote><p>更详细的学习路线戳：<a href="https://tobebetterjavaer.com/xuexiluxian/java/yitiaolong.html" target="_blank" rel="noopener noreferrer">https://tobebetterjavaer.com/xuexiluxian/java/yitiaolong.html<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><h3 id="二、开发框架" tabindex="-1"><a class="header-anchor" href="#二、开发框架" aria-hidden="true">#</a> 二、开发框架</h3><p>可能很多人会对开发框架嗤之以鼻，感觉学这个没多大用处，提升不了你的技术功底。但是呢，如果你想做练手项目，没有开发框架的帮助，很难。</p><p>Java 之所以流行，很重要的一部分原因就是拥有 Spring 系列框架这个大杀器，包括 SSM（Spring+SpringMVC+MyBatis）、Spring Boot、Spring Cloud。</p><p>我们只是不应该停留在只会用的层面上，要懂背后的原理。说一千道一万，Spring 的核心就两个概念：AOP、IoC。</p><p>AOP（Aspect-Oriented Programming），也就是面向切面编程，能够将那些与业务无关，却为业务模块所共同调用的逻辑或责任（例如事务处理、日志管理、权限控制等）封装起来，便于减少系统的重复代码，降低模块间的耦合度，并有利于未来的可拓展性和可维护性。</p><p>IoC（Inverse of Control），也就是控制反转，是一种设计思想，就是将原本在程序中手动创建对象的控制权，交由 Spring 框架来管理。</p><p>先学习 SSM，再学习 Spring Boot。Spring Boot 的出现，并不意味着 Spring 和 SpringMVC 已经过时了，从设计目的上来说，Spring Boot 只是实现了 Spring 的自动装配，降低了项目搭建的难度。</p><p>从技术角度来说，Spring Boot 的底层依然是 Spring 的核心机制，也就是 AOP 和 IoC，Spring Boot 只是一个承载者。在我看来，学习 Spring 的正确路径应该是 Spring -&gt; Servlet -&gt; Spring MVC -&gt; Spring Boot。</p><h3 id="三、数据库" tabindex="-1"><a class="header-anchor" href="#三、数据库" aria-hidden="true">#</a> 三、数据库</h3><p>增删改查，增删改查，要想做一名只会 CRUD 的程序员，数据库这块是逃不掉的。不过，这里就不重点说了，推荐一些资源给大家。</p><p>小破站上的三个视频。</p><ul><li>SQL：<a href="https://www.bilibili.com/video/BV1UE41147KC" target="_blank" rel="noopener noreferrer">https://www.bilibili.com/video/BV1UE41147KC<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li>MySQL：<a href="https://www.bilibili.com/video/BV12b411K7Zu" target="_blank" rel="noopener noreferrer">https://www.bilibili.com/video/BV12b411K7Zu<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li>Redis：<a href="https://www.bilibili.com/video/BV1S54y1R7SB" target="_blank" rel="noopener noreferrer">https://www.bilibili.com/video/BV1S54y1R7SB<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul><p>四本书。</p><ul><li>《SQL 必知必会》</li><li>《高性能 MySQL》</li><li>《MySQL 技术内幕-InnoDB 存储引擎》</li><li>《Redis 深入历险核心原理与应用实战》</li></ul><h3 id="四、计算机组成原理" tabindex="-1"><a class="header-anchor" href="#四、计算机组成原理" aria-hidden="true">#</a> 四、计算机组成原理</h3><p>计算机是由 CPU、内存、输入输出设备，这些硬件组成的，但我们程序员，往往从事的是软件开发的工作，怎么在硬件和软件之间搭起一座桥梁呢？</p><p>答案就是学习计算机组成原理。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexijianyi/electron-information-engineering-5270d8c0-5e03-4a06-924c-c9a8d25dd446.jpg" alt=""></p><p>计算机组成原理的知识点可以拆分为四个部分：</p><ul><li>计算机的基本组成硬件</li><li>计算机的指令和计算</li><li>处理器涉及</li><li>存储器和 IO 设备</li></ul><p>按照冯诺依曼的体系结构，计算机分为运算器、控制器、存储器、输入输出设备；我们编写的代码，要想在计算机上运行，就需要通过编译器转成汇编代码，再经过汇编器转成一条条指令，这些指令的执行，是由控制器来完成的。</p><p><strong>计算机组成原理该怎么学呢</strong>？</p><p>如果英语功底非常不错的话，安利一门 Coursera 上的课程，从与非门到俄罗斯方块，简单来说，这门课会教你怎么从与非门开始造一台计算机。</p><blockquote><p>地址：<a href="https://www.coursera.org/learn/build-a-computer%E2%80%8Bwww.coursera.org/learn/build-a-computer" target="_blank" rel="noopener noreferrer">https://www.coursera.org/learn/build-a-computer​www.coursera.org/learn/build-a-computer<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>这门课的视频拍的那叫一个优质，虽然没有中文翻译，但视频下方的字幕会有节奏的移动。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexijianyi/electron-information-engineering-a5f13f0d-c0e1-486a-933a-7bfa81983a6c.jpg" alt=""></p><p>国内的推荐哈工大的这门视频课，整体评价非常高（建议 1.5 倍速食用），戳：<a href="https://www.bilibili.com/video/BV1WW411Q7PF" target="_blank" rel="noopener noreferrer">计算机组成原理（唐朔飞）_哔哩哔哩_bilibili<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><h3 id="五、数据结构与算法" tabindex="-1"><a class="header-anchor" href="#五、数据结构与算法" aria-hidden="true">#</a> 五、数据结构与算法</h3><p>可能有人会觉得：就算不懂数据结构与算法，照样可以把 Java API、开发框架用得飞起？</p><p>但这里我想表达的是：</p><p><strong>1）数据结构与算法是很多大厂筛选人才的要素之一</strong>。</p><p>这是因为校招的时候，参加面试的学生大多数都是没有实际项目经验的，公司只能通过考察这些基础知识来筛选。</p><p>大厂不怕你没有项目经验，而怕你没有长期发展的潜力。所以，很多参加校招的同学，在面试前都会疯狂刷题的，至少会突击个 100 道左右的题目。</p><p><strong>2）实际工作当中肯定是会用到的。</strong></p><p>举个例子，存储某个业务数据时，你打算用 ArrayList 还是 LinkedList，它们底层用的是哪种数据结构，增删改查上有哪些优缺点？</p><p>再比如，Redis 中的有序集合是用什么数据结构实现的？为什么要用跳表二不是二叉树呢？</p><p>不懂数据结构和算法，行得通吗？</p><p><strong>3）掌握了数据结构与算法，对阅读源码会有很大的帮助。</strong></p><p>因为很多时候，源码当中都会考量到不同数据结构之间的优点和缺点。</p><p>你比如说，HashMap 为什么在链表长度大于 8 的时候将其转为红黑树？为什么不能是二叉树？</p><p><strong>那数据结构与算法该怎么学习呢？</strong></p><p>我画了一张图，里面几乎涵盖了所有数据结构与算法书籍中都会讲到的知识点。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexijianyi/electron-information-engineering-46294124-8e8f-4d2e-ac48-f68a1be9b2ac.jpg" alt=""></p><p>如果英语功底不错的话，推荐国外的 MIT 6.006，是经典的数据结构和算法入门课程，涉及到排序、哈希、图论、动态规划。</p><p><a href="https://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-006-introduction-to-algorithms-fall-2011/" target="_blank" rel="noopener noreferrer">https://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-006-introduction-to-algorithms-fall-2011/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><p>国内的推荐浙江大学的一个的课程，很系统很经典，适合小白入门。</p><p><a href="https://www.bilibili.com/video/BV1JW411i731" target="_blank" rel="noopener noreferrer">数据结构-浙江大学_哔哩哔哩_bilibili<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><p>至于练习，推荐到 LeetCode 或者牛客网上刷题吧，上面的问题往往有趣且带有良好的解法和讨论。此外，在竞争日益激烈的软件行业，这些问题可以帮助你评估自己应对技术面试中常见问题的能力。</p><p>我的心得就是简单粗暴：从易到难，一遍一遍地刷，尽量使用自己熟悉的编程语言，比如说 Java 程序员尽量用 Java 来解题，这样刷题的幸福感也会提升很大一截。</p><p>如果不是天赋异禀，不要怕，一开始就是抄题，先把别人的解题思路照着敲出来。刷的题多了，尽量控制一下刷题的时间，掐个点，不能让自己一直想、一直写下去，如果半个小时没有解出来，就果断放弃，去背别人的答案，不要觉得不好意思，等到真的熟了，再去想自己的解题思路。</p><blockquote><p>更详细的学习路线戳：<a href="https://tobebetterjavaer.com/xuexiluxian/algorithm.html" target="_blank" rel="noopener noreferrer">https://tobebetterjavaer.com/xuexiluxian/algorithm.html<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><h3 id="六、操作系统" tabindex="-1"><a class="header-anchor" href="#六、操作系统" aria-hidden="true">#</a> 六、操作系统</h3><p>操作系统是管理计算机硬件和软件资源的程序，是计算机的基石。</p><p>操作系统负责的工作有：管理设备、文件读写、控制进程、管理内存等等，算是所有软件中的老大，掌握着生杀大权。推荐的学习资料有《现代操作系统》、《深入理解计算机系统》这两本书。</p><p>考过研的同学应该知道《深入理解计算机系统》这本书是必读的，我自己最近又买了一本新的，算是我读的第二遍了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexijianyi/electron-information-engineering-52358273-5b8b-416a-b466-986b5f3ee96a.jpg" alt=""></p><p>操作系统中的很多思想和经典算法，都可以在日常开发使用的各种工具或者框架中找到影子。</p><p>比如说 Redis 和操作系统的高速缓存就很像，Redis 是用来解决程序处理速度和访问 MySQL 速度不对等的问题，而内存就是用来解决 CPU 处理速度和访问磁盘等外存速度不对等的问题。</p><p>像操作系统，国内通常会考 PPT 上那些需要死记硬背的知识点，而国外往往会要求实现一个简单的操作系统内核。</p><p>如果英语功底非常不错的话，推荐国外的 MIT6.828，是一门公认的硬核课程，是理论与实践相结合的经典。建议有一些 C语言语言的基础后，再来看这门课程，一定会大有所获。只要你跟着项目一步一步走，就能实现一个简单的操作系统内核。</p><p>课程地址：<a href="https://pdos.csail.mit.edu/6.828/2018/schedule.html" target="_blank" rel="noopener noreferrer">6.828 / Fall 2018<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><p>操作系统应该提供的功能：</p><ol><li>多进程支持</li><li>进程间隔离</li><li>受控制的进程间通信</li></ol><p>内核（<em>kernel</em>）是操作系统的核心，它是一种为运行的程序提供服务的特殊程序。每个运行着的程序叫做进程，每个进程的内存中存储着指令、数据和堆栈。一个计算机可以拥有多个进程，但是只能有一个内核。</p><p>每当进程需要调用内核时，它会触发一个<em>system call</em>（系统调用），system call进入内核执行相应的服务然后返回。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexijianyi/electron-information-engineering-b7db672b-7a5a-443f-8a4d-5a8e1d65886c.jpg" alt=""></p><p>网友在学习这门课程的时候做的笔记：<a href="https://fanxiao.tech/posts/MIT-6S081-notes/" target="_blank" rel="noopener noreferrer">MIT 6.S081 Lecture Notes<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，大家可以作为参考。</p><p>国内的「清华大学公开课：操作系统」口碑也相当的不错。</p><p><a href="https://open.163.com/newview/movie/courseintro%3Fnewurl%3DME1NSA351" target="_blank" rel="noopener noreferrer">清华大学公开课：操作系统<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><p>还有哈工大的操作系统课：</p><p><a href="https://www.bilibili.com/video/av17036347" target="_blank" rel="noopener noreferrer">操作系统哈尔滨工业大学李治军老师_哔哩哔哩_bilibili<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><p>以“如何给一个拥有单核 CPU、内存、磁盘、键盘和显示器的基本计算机配备一个可实际运转的操作系统”这一基本问题作为主线，分为四大块：</p><ul><li>操作系统基础</li><li>进程与线程</li><li>内存管理</li><li>设备驱动与文件系统</li></ul><p>下图是课程的封面，一个简易版的操作系统，和我们当前使用操作系统界面比起来，显然丑露无比，但它能让你体会到快乐——一种真正地学到了本领的快乐。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexijianyi/electron-information-engineering-cdccae94-aca8-4e88-b241-0b6d95dee5f9.jpg" alt=""></p><blockquote><p>更详细的学习路线戳：<a href="https://tobebetterjavaer.com/xuexiluxian/os.html" target="_blank" rel="noopener noreferrer">https://tobebetterjavaer.com/xuexiluxian/os.html<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>借这个机会，我希望把多年来整理的硬核学习资料分享出来，帮助到更多小伙伴，包括<strong>编程语言的入门教程，操作系统、计算机网络、数据结构与算法这种偏基础的硬核知识，以及能“吊打”面试官的八股文：</strong></p><p>直接长按识别/扫描下方二维码，关注后回复 「<strong>00</strong>」 下载这份 PDF 吧：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongzhonghao.png" alt="扫码关注后回复「00」关键字"></p><h2 id="三、嵌入式" tabindex="-1"><a class="header-anchor" href="#三、嵌入式" aria-hidden="true">#</a> 三、嵌入式</h2><p>嵌入式可以进一步细分为嵌入式硬件和嵌入式软件。</p><p>嵌入式硬件工程师逼近要求具备硬件工程师的基本技能，还必须完成部分软件工程师的工作，比如说能对底层驱动的嵌入式操作系统进行裁剪、移植。</p><p>嵌入式硬件工程师的主要职责是为产品设计硬件电路原理图、PCB 板（印刷电路板），选择合适的元器件，焊接调试硬件电路板，保证硬件电路板的可靠性、稳定性和抗干扰能力。</p><p>一个资深的嵌入式硬件工程师的年薪在 15-30 万左右。需要有非常扎实的理论知识，以及高频 CPU、多层 PCB 板的设计经验。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexijianyi/electron-information-engineering-34380fff-fcbd-4d1a-805d-72d38a1d8834.png" alt=""></p><p>嵌入式软件工程师指在 wince、linux 等嵌入式操作系统下进行用户应用软件开发的人员，硬件平台有手机、pad 等；开发工具有 wince 下的 evc，Linux 下的 QT 等。</p><p>嵌入式软件工程师的主要职责是根据产品的功能需求设计出好的软件，让硬件工作起来。一般情况下，软件工程师的需求量更大一些。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexijianyi/electron-information-engineering-5e3615e1-54c3-41a2-beca-97fcac8bc2cb.png" alt=""></p><p>一个资深的嵌入式软件工程师的年薪也在 15-30 万左右。要熟练掌握 C/C++，熟练使用CortexM4系列单片机、RTOS(FreeRTOS, UcosII，RT-thread)等。</p><p><strong>希望能给大家提供一点点帮助和启发~</strong></p><p><img 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15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 5 分钟</span><meta property="timeRequired" content="PT5M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="如何阅读《深入理解计算机系统》这本书" tabindex="-1"><a class="header-anchor" href="#如何阅读《深入理解计算机系统》这本书" aria-hidden="true">#</a> 如何阅读《深入理解计算机系统》这本书？</h1><p>大家好，我是二哥呀！</p><p>好家伙，昨天在逛知乎的时候，发现了一个宝藏。</p><p>有个网名叫“行走的西红柿”在如何阅读《深入理解计算机系统》这本书的回答里，提到了两个视频教程，真的有震惊到我。</p><p>《深入理解计算机系统》这本书应该大家早有耳闻，考过研的同学应该知道这本书是必读的。</p><p>英文名叫《ComputerSystem:A programer perspective》，简写为 CSAPP，很多大学都拿它来作为教材，比如说北大、交大、哈工大等等。</p><p>先说一下阅读这本书的前提条件，就是你要先学习一下 C 语言。</p><p>接下来，我把“行走的西红柿”提到的两个视频教程地址贴出来，给大家分享下。</p><p>第一个视频地址：</p><blockquote><p><a href="https://www.bilibili.com/video/BV1iW411d7hd" target="_blank" rel="noopener noreferrer">https://www.bilibili.com/video/BV1iW411d7hd<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>这是 CSAPP 这本书的两个作者授课的视频，B 站上有 UP 主做了中英文字幕的校对。</p><p>我截了一张图，给大家看一下，这门课的目的：“让你深入了解代码在执行的时候到底发生了什么？”可以说包含了计算机专业的方方面面，计算机组成原理、操作系统、计算机网络等等。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexijianyi/read-csapp-eb4daee0-0de3-4f7f-8b7b-6892dba3305d.png" alt=""></p><p>第二个视频地址：</p><blockquote><p><a href="https://www.bilibili.com/video/BV1cD4y1D7uR" target="_blank" rel="noopener noreferrer">https://www.bilibili.com/video/BV1cD4y1D7uR<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>这是一位大佬对 CSAPP 这本书的解读视频，我个人觉得简直就是——雷锋？宝藏？任何我目前能想到的赞美的词汇都不足以代表我此时此刻对这位大佬的尊敬！</p><p>首先，我必须得承认一点，这个视频的唯一缺点就是麦克风的噪音比较大，原因我想有两个，第一可能是大佬没有买声卡这种设备，第二就是没有对声音做降噪处理。</p><p>不过，瑕不掩瑜。</p><p>视频主要分为 4 个部分：</p><ul><li>计算机系统漫游</li><li>程序结构和执行</li><li>如何在系统上运行程序</li><li>进程间的交互和通信</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexijianyi/read-csapp-3f838b31-1551-438b-8f44-d4a2b5ab27dd.png" alt=""></p><p>分享一些我的视频观感——计算机系统漫游部分。</p><p>第一个视频就讲解了 hello 程序在计算机上执行的整个过程，让我印象非常深刻。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexijianyi/read-csapp-9967518e-7807-4d84-a774-bc6eb5f44229.png" alt=""></p><p>第二个视频讲解了计算机的整个硬件组成部分，看下面这幅图，也太清晰了吧！</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexijianyi/read-csapp-2bc0b332-7039-4978-86fa-f33701afb0e1.png" alt=""></p><p>第三个视频，普及了进程和线程、以及虚拟内存等重要知识点。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexijianyi/read-csapp-7b171f32-4418-4ba2-84ef-fe55881a1874.png" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexijianyi/read-csapp-298ded3a-e510-466e-809e-57a9a998ab80.png" alt=""></p><p>第四个视频，讲解了阿姆达尔定律，以及如何提高程序性能的解决方案。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexijianyi/read-csapp-fe228ea9-4317-4b19-881e-08972ff20c9e.png" alt=""></p><p>这两套视频我还没有看完，除了有一些看不懂之外，很多知识点都需要看多遍，并且查找一些资料后才能懂。</p><p>所以，给大家一个建议，学习，不要怕自己看不懂学不会，因为对于大部分普通人来说，包括二哥在内，接收知识的过程都是一个由易到难、循序渐进的过程，没办法一蹴而就。</p><p>对于经典的书籍，优质的课程，可能你穷极一生都没办法全部掌握。我这样说可能有些夸张，但事实可能确实如此。你不需要对自己太过苛刻，你需要记住的是，考 1 分比考 0 分强，考 60 分比考 59 分强；只要你肯去花时间学习，哪怕只学到了皮毛，也会比没学强很多。</p><p>这也是我一直以来对待学习的一个态度。</p><p>可能因为种种原因，我们没办法做全年级的第一名，那我们可以尝试做班级的第一名；没办法做班级的第一名，就做班级的前十名吧。</p><p>这不是一种妥协，而是一种不卑不亢的态度。毕竟天外有天，人外有人。</p><p>拿我自己来说吧，我既不是 985、211 的学长，也没有在一线互联网大厂的从业经验，但这有什么关系呢？只要我一直在进步，一直在学习，就能追赶上这个世界的浪潮，作出应有的贡献，其一就是帮助大家一起成长。</p><p>或许，这更应该是大多数普通人该有的态度。</p><p>就像 CSAPP 这门课，确实经典，确实牛逼，但当你只是一个编程初学者的时候，尽量先不去碰它，免得被劝退。除非你是万里挑一。</p><p>但当你有了一定的编程经验后，你就不应该再去逃避这门课了。你应该去学习这门课程，无论头皮硬不硬，因为它能真正提升你的竞争力。</p><p>除了上面提到的这两门视频课程可以作为辅助学习资料外，我再给你推荐一个上海交通大学的课程，地址：</p><blockquote><p><a href="https://www.icourse163.org/course/SJTU-1206676848" target="_blank" rel="noopener noreferrer">https://www.icourse163.org/course/SJTU-1206676848<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>这门课是 2020 年新出的，所以食用起来会更加的舒适。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexijianyi/read-csapp-5a759059-81da-4814-881c-5b58fb168de8.png" alt=""></p><p>当然了，要学好 CSAPP 这门课，并不容易，因为它包含了汇编、计算机组成原理、操作系统、计算机网络等等方方面面的知识，任何一个知识点展开去学习，都是需要花费大量时间和精力的。</p><p>但求知的快乐不也正源于此吗？</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a 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354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 5 分钟</span><meta property="timeRequired" content="PT5M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="如何阅读《深入理解计算机系统》这本书" tabindex="-1"><a class="header-anchor" href="#如何阅读《深入理解计算机系统》这本书" aria-hidden="true">#</a> 如何阅读《深入理解计算机系统》这本书？</h1><p>大家好，我是二哥呀！好家伙，昨天在逛知乎的时候，发现了一个宝藏。</p><p>有个网名叫“行走的西红柿”在如何阅读《深入理解计算机系统》这本书的回答里，提到了两个视频教程，真的有震惊到我。</p><p>《深入理解计算机系统》这本书应该大家早有耳闻，考过研的同学应该知道这本书是必读的。</p><p>英文名叫《ComputerSystem:A programer perspective》，简写为 CSAPP，很多大学都拿它来作为教材，比如说北大、交大、哈工大等等。</p><p>先说一下阅读这本书的前提条件，就是你要先学习一下 C 语言。</p><p>接下来，我把“行走的西红柿”提到的两个视频教程地址贴出来，给大家分享下。</p><p>第一个视频地址：</p><blockquote><p><a href="https://www.bilibili.com/video/BV1iW411d7hd" target="_blank" rel="noopener noreferrer">https://www.bilibili.com/video/BV1iW411d7hd<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>这是 CSAPP 这本书的两个作者授课的视频，B 站上有 UP 主做了中英文字幕的校对。</p><p>我截了一张图，给大家看一下，这门课的目的：“让你深入了解代码在执行的时候到底发生了什么？”可以说包含了计算机专业的方方面面，计算机组成原理、操作系统、计算机网络等等。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexijianyi/read-csapp-eb4daee0-0de3-4f7f-8b7b-6892dba3305d.png" alt=""></p><p>第二个视频地址：</p><blockquote><p><a href="https://www.bilibili.com/video/BV1cD4y1D7uR" target="_blank" rel="noopener noreferrer">https://www.bilibili.com/video/BV1cD4y1D7uR<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>这是一位大佬对 CSAPP 这本书的解读视频，我个人觉得简直就是——雷锋？宝藏？任何我目前能想到的赞美的词汇都不足以代表我此时此刻对这位大佬的尊敬！</p><p>首先，我必须得承认一点，这个视频的唯一缺点就是麦克风的噪音比较大，原因我想有两个，第一可能是大佬没有买声卡这种设备，第二就是没有对声音做降噪处理。</p><p>不过，瑕不掩瑜。</p><p>视频主要分为 4 个部分：</p><ul><li>计算机系统漫游</li><li>程序结构和执行</li><li>如何在系统上运行程序</li><li>进程间的交互和通信</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexijianyi/read-csapp-3f838b31-1551-438b-8f44-d4a2b5ab27dd.png" alt=""></p><p>分享一些我的视频观感——计算机系统漫游部分。</p><p>第一个视频就讲解了 hello 程序在计算机上执行的整个过程，让我印象非常深刻。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexijianyi/read-csapp-9967518e-7807-4d84-a774-bc6eb5f44229.png" alt=""></p><p>第二个视频讲解了计算机的整个硬件组成部分，看下面这幅图，也太清晰了吧！</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexijianyi/read-csapp-2bc0b332-7039-4978-86fa-f33701afb0e1.png" alt=""></p><p>第三个视频，普及了进程和线程、以及虚拟内存等重要知识点。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexijianyi/read-csapp-7b171f32-4418-4ba2-84ef-fe55881a1874.png" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexijianyi/read-csapp-298ded3a-e510-466e-809e-57a9a998ab80.png" alt=""></p><p>第四个视频，讲解了阿姆达尔定律，以及如何提高程序性能的解决方案。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexijianyi/read-csapp-fe228ea9-4317-4b19-881e-08972ff20c9e.png" alt=""></p><p>这两套视频我还没有看完，除了有一些看不懂之外，很多知识点都需要看多遍，并且查找一些资料后才能懂。</p><p>所以，给大家一个建议，学习，不要怕自己看不懂学不会，因为对于大部分普通人来说，包括二哥在内，接收知识的过程都是一个由易到难、循序渐进的过程，没办法一蹴而就。</p><p>对于经典的书籍，优质的课程，可能你穷极一生都没办法全部掌握。我这样说可能有些夸张，但事实可能确实如此。你不需要对自己太过苛刻，你需要记住的是，考 1 分比考 0 分强，考 60 分比考 59 分强；只要你肯去花时间学习，哪怕只学到了皮毛，也会比没学强很多。</p><p>这也是我一直以来对待学习的一个态度。</p><p>可能因为种种原因，我们没办法做全年级的第一名，那我们可以尝试做班级的第一名；没办法做班级的第一名，就做班级的前十名吧。</p><p>这不是一种妥协，而是一种不卑不亢的态度。毕竟天外有天，人外有人。</p><p>拿我自己来说吧，我既不是 985、211 的学长，也没有在一线互联网大厂的从业经验，但这有什么关系呢？只要我一直在进步，一直在学习，就能追赶上这个世界的浪潮，作出应有的贡献，其一就是帮助大家一起成长。</p><p>或许，这更应该是大多数普通人该有的态度。</p><p>就像 CSAPP 这门课，确实经典，确实牛逼，但当你只是一个编程初学者的时候，尽量先不去碰它，免得被劝退。除非你是万里挑一。</p><p>但当你有了一定的编程经验后，你就不应该再去逃避这门课了。你应该去学习这门课程，无论头皮硬不硬，因为它能真正提升你的竞争力。</p><p>除了上面提到的这两门视频课程可以作为辅助学习资料外，我再给你推荐一个上海交通大学的课程，地址：</p><blockquote><p><a href="https://www.icourse163.org/course/SJTU-1206676848" target="_blank" rel="noopener noreferrer">https://www.icourse163.org/course/SJTU-1206676848<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>这门课是 2020 年新出的，所以食用起来会更加的舒适。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexijianyi/read-csapp-5a759059-81da-4814-881c-5b58fb168de8.png" alt=""></p><p>当然了，要学好 CSAPP 这门课，并不容易，因为它包含了汇编、计算机组成原理、操作系统、计算机网络等等方方面面的知识，任何一个知识点展开去学习，都是需要花费大量时间和精力的。</p><p>但求知的快乐不也正源于此吗？</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/xuexijianyi/read-csapp.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 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aria-label="五、一点小心得"><!---->五、一点小心得<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->算法和数据结构学习路线（建议收藏👍）</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 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0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>学习路线</li><meta property="articleSection" content="学习路线"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag3" role>算法和数据结构</li></ul><meta property="keywords" content="算法和数据结构"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 12 分钟</span><meta property="timeRequired" content="PT12M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/algorithm.html#一、什么是数据结构" class="router-link-active router-link-exact-active toc-link level3">一、什么是数据结构</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/algorithm.html#二、什么是算法" class="router-link-active router-link-exact-active toc-link level3">二、什么是算法</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/algorithm.html#三、为什么要学习数据结构和算法" class="router-link-active router-link-exact-active toc-link level3">三、为什么要学习数据结构和算法</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/algorithm.html#四、硬核算法和数据结构学习资料" class="router-link-active router-link-exact-active toc-link level3">四、硬核算法和数据结构学习资料</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/algorithm.html#五、一点小心得" class="router-link-active router-link-exact-active toc-link level3">五、一点小心得</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="算法和数据结构学习路线-建议收藏" tabindex="-1"><a class="header-anchor" href="#算法和数据结构学习路线-建议收藏" aria-hidden="true">#</a> 算法和数据结构学习路线（建议收藏👍）</h1><p>说出来还真有点不好意思。上学那时候傻，为了校招，硬着头皮刷《算法导论》、《编程珠玑》，还有 LeetCode，刷了小一年。</p><p>刷着忘着，忘着刷着，不刷怕考到，最后刷的秀发都稀疏了。</p><p>等找到了工作后才恍然大悟，原来当初根本不用那么辛苦。这不，刚好有小伙伴在《<a href="https://tobebetterjavaer.com/" target="_blank" rel="noopener noreferrer">Java 程序员进阶之路<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>》上问我算法的学习路线，我就毫不保留地把我算法方面的学习经验分享出来，希望能给大家一点点启发和帮助。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/algorithm-59f3bc36-4e6c-48c0-86e5-8afdd6165147.png" alt=""></p><p>我画了一张图，里面几乎涵盖了所有数据结构与算法书籍中都会讲到的知识点。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/algorithm-220e86a7-fa5d-44a2-a560-3cb6cfa70ad0.png" alt=""></p><p>但讲良心话，对于一个初学者，或者不打算卷算法岗的程序员来说，完全就没必要把思维导图里面的所有知识点都学了，那样就太不高效了。</p><p>我们学习数据结构与算法，也得讲究策略。我的建议是这样的（敲黑板、划重点了啊）：</p><p><strong>7 个数据结构</strong>：</p><ul><li>数组</li><li>链表</li><li>栈</li><li>队列</li><li>哈希表</li><li>二叉树</li><li>堆</li></ul><p><strong>10 个算法</strong>：</p><ul><li>递归</li><li>排序</li><li>二分查找</li><li>搜索</li><li>哈希算法</li><li>贪心算法</li><li>分治算法</li><li>回溯算法</li><li>动态规划</li><li>字符串匹配算法</li></ul><p>这些是学习数据结构与算法时的重点。很多人在第一次接触数据结构与算法这门课时，往往会觉得很抽象，很难搞懂，以至于站在门外徘徊不前。</p><p>其实真正的原因是没有找到好的学习方法，没有抓住学习的重点。相信你认真看完我这条学习路线后，学起来就会有的放矢、事半功倍了。</p><h3 id="一、什么是数据结构" tabindex="-1"><a class="header-anchor" href="#一、什么是数据结构" aria-hidden="true">#</a> 一、什么是数据结构</h3><p>数据结构是一种具有一定逻辑关系，在计算机中应用某种存储结构，并且封装了相应操作的数据元素集合。它包含三方面的内容，逻辑关系、存储关系及操作。不同种类的数据结构适合于不同种类的应用，而部分甚至专门用于特定的作业任务。例如，计算机网络依赖于路由表运作，B 树高度适用于数据库的封装。</p><p>简单点说，数据结构就是把一堆数据，按照某种格式揉成一坨。</p><p>大家喜欢吃宫保鸡丁吗？</p><p>反正二哥挺喜欢这道菜的。我就以宫保鸡丁为例，来讲一讲数据结构吧。维基百科上是这样定义的。</p><p>宫保鸡丁（英语：Kung Pao chicken或Kung-Pao Chicken），又称宫爆鸡丁，呈糊辣荔枝味，源于黔菜、流传至鲁而后成于川菜的一道川味名菜。贵州、山东和四川三地对这道菜的做法不完全一样，称呼也有差异。贵州称为糊辣子鸡丁，山东则名为酱爆鸡丁，而四川是以宫保鸡丁为名的。</p><p>来，抽象下宫保鸡丁。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>struct KungPaoChicken {
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class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 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category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>学习路线</li><meta property="articleSection" content="学习路线"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag3" role>算法和数据结构</li></ul><meta property="keywords" content="算法和数据结构"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 12 分钟</span><meta property="timeRequired" content="PT12M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/algorithm.html#一、什么是数据结构" class="router-link-active router-link-exact-active toc-link level3">一、什么是数据结构</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/algorithm.html#二、什么是算法" class="router-link-active router-link-exact-active toc-link level3">二、什么是算法</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/algorithm.html#三、为什么要学习数据结构和算法" class="router-link-active router-link-exact-active toc-link level3">三、为什么要学习数据结构和算法</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/algorithm.html#四、硬核算法和数据结构学习资料" class="router-link-active router-link-exact-active toc-link level3">四、硬核算法和数据结构学习资料</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/algorithm.html#五、一点小心得" class="router-link-active router-link-exact-active toc-link level3">五、一点小心得</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="算法和数据结构学习路线-建议收藏" tabindex="-1"><a class="header-anchor" href="#算法和数据结构学习路线-建议收藏" aria-hidden="true">#</a> 算法和数据结构学习路线（建议收藏👍）</h1><p>说出来还真有点不好意思。上学那时候傻，为了校招，硬着头皮刷《算法导论》、《编程珠玑》，还有 LeetCode，刷了小一年。</p><p>刷着忘着，忘着刷着，不刷怕考到，最后刷的秀发都稀疏了。</p><p>等找到了工作后才恍然大悟，原来当初根本不用那么辛苦。这不，刚好有小伙伴在《<a href="https://tobebetterjavaer.com/" target="_blank" rel="noopener noreferrer">Java 程序员进阶之路<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>》上问我算法的学习路线，我就毫不保留地把我算法方面的学习经验分享出来，希望能给大家一点点启发和帮助。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/algorithm-59f3bc36-4e6c-48c0-86e5-8afdd6165147.png" alt=""></p><p>我画了一张图，里面几乎涵盖了所有数据结构与算法书籍中都会讲到的知识点。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/algorithm-220e86a7-fa5d-44a2-a560-3cb6cfa70ad0.png" alt=""></p><p>但讲良心话，对于一个初学者，或者不打算卷算法岗的程序员来说，完全就没必要把思维导图里面的所有知识点都学了，那样就太不高效了。</p><p>我们学习数据结构与算法，也得讲究策略。我的建议是这样的（敲黑板、划重点了啊）：</p><p><strong>7 个数据结构</strong>：</p><ul><li>数组</li><li>链表</li><li>栈</li><li>队列</li><li>哈希表</li><li>二叉树</li><li>堆</li></ul><p><strong>10 个算法</strong>：</p><ul><li>递归</li><li>排序</li><li>二分查找</li><li>搜索</li><li>哈希算法</li><li>贪心算法</li><li>分治算法</li><li>回溯算法</li><li>动态规划</li><li>字符串匹配算法</li></ul><p>这些是学习数据结构与算法时的重点。很多人在第一次接触数据结构与算法这门课时，往往会觉得很抽象，很难搞懂，以至于站在门外徘徊不前。</p><p>其实真正的原因是没有找到好的学习方法，没有抓住学习的重点。相信你认真看完我这条学习路线后，学起来就会有的放矢、事半功倍了。</p><h3 id="一、什么是数据结构" tabindex="-1"><a class="header-anchor" href="#一、什么是数据结构" aria-hidden="true">#</a> 一、什么是数据结构</h3><p>数据结构是一种具有一定逻辑关系，在计算机中应用某种存储结构，并且封装了相应操作的数据元素集合。它包含三方面的内容，逻辑关系、存储关系及操作。不同种类的数据结构适合于不同种类的应用，而部分甚至专门用于特定的作业任务。例如，计算机网络依赖于路由表运作，B 树高度适用于数据库的封装。</p><p>简单点说，数据结构就是把一堆数据，按照某种格式揉成一坨。</p><p>大家喜欢吃宫保鸡丁吗？</p><p>反正二哥挺喜欢这道菜的。我就以宫保鸡丁为例，来讲一讲数据结构吧。维基百科上是这样定义的。</p><p>宫保鸡丁（英语：Kung Pao chicken或Kung-Pao Chicken），又称宫爆鸡丁，呈糊辣荔枝味，源于黔菜、流传至鲁而后成于川菜的一道川味名菜。贵州、山东和四川三地对这道菜的做法不完全一样，称呼也有差异。贵州称为糊辣子鸡丁，山东则名为酱爆鸡丁，而四川是以宫保鸡丁为名的。</p><p>来，抽象下宫保鸡丁。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>struct KungPaoChicken {
   鸡肉 = []
   花生 = []
   葱段 = []
@@ -58,6 +58,6 @@
   }
 }
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>伪代码不是很严谨哈，大家理解这个意思就行了。</p><p>说到底，数据结构不过是一种抽象后的封装。像 Java，它之所以流行的一个很重要的原因，就是它提供了多种多样的、方便开发者调用的数据结构，比如说对数组的封装 ArrayList、对链表的封装 LinkedList、对哈希表的封装 HashMap、ConcurrentHashMap 等等。C 语言就没有这些，想用的话，就得自己封装。但 Java 和 C 语言的基本数据类型是一致的，int、float 这些都是相通的。</p><p>对于初学者来说，平常敲代码都是直接去调用数据结构的，是很少去想这些数据结构是怎么实现的。</p><p>当一个初学者向高级程序员迈进的时候，就必须得静下心来，去搞清楚 ArrayList 和 LinkedList 的内部实现，搞清楚之后就会明白，之所以它们在增删改查的时候性能上有差异，就是因为它们的内部使用了不同的数据结构所导致的。</p><p>经典的数据结构与算法都有哪些呢？比如说队列、栈、堆、二分查找、动态规划等等。</p><h3 id="二、什么是算法" tabindex="-1"><a class="header-anchor" href="#二、什么是算法" aria-hidden="true">#</a> 二、什么是算法</h3><p>算法就是操作数据的一组方法。数据结构是为算法服务的，而算法想要体现出自己的价值，就必须得有数据结构这个载体。</p><p>它们俩就好像是一对恋人，离开了谁，都会孤单寂寞冷。</p><p>那一些初学者可能会有这样的疑惑：我数学成绩一般，学数据结构与算法会很吃力吗？</p><p>当然了，数据结构和算法离不开一些数学方面的推理和证明，比如说我们在分析某个算法的时间复杂度和空间复杂度时。但这个不需要去担心，只要你能保持高中时期的数学水准，就完全可以学好数据结构与算法。</p><h3 id="三、为什么要学习数据结构和算法" tabindex="-1"><a class="header-anchor" href="#三、为什么要学习数据结构和算法" aria-hidden="true">#</a> 三、为什么要学习数据结构和算法</h3><p>你是不是觉得数据结构与算法，跟操作系统、计算机网络一样，都是脱离实际工作的知识，可能除了面试，这辈子都用不着？</p><p>就算不懂数据结构与算法，照样可以把 Java API、开发框架用得飞起？</p><p>首先，面试的确是要考数据结构与算法的。这是很多大厂的筛选要素之一。</p><p>这是因为校招的时候，参加面试的学生大多数都是没有实际项目经验的，公司只能通过考察这些基础知识来筛选。</p><p>大厂不怕你没有项目经验，而怕你没有长期发展的潜力。</p><p>所以，很多参加校招的同学，在面试前都会疯狂刷题的，至少会突击个 100 道左右的题目。</p><p>其次，实际工作当中肯定是会用到的。</p><p>举个例子，存储某个业务数据时，你打算用 ArrayList 还是 LinkedList，它们底层用的是哪种数据结构，增删改查上有哪些优缺点？</p><p>再比如，Redis 中的有序集合是用什么数据结构实现的？为什么要用跳表二不是二叉树呢？</p><p>不懂数据结构和算法，行得通吗？</p><p>还有，掌握了数据结构与算法，对阅读源码会有很大的帮助，因为很多时候，源码当中都会考量到不同数据结构之间的优点和缺点。</p><p>你比如说，HashMap 为什么在链表长度大于 8 的时候将其转为红黑树？为什么不能是二叉树？</p><p>总结一下。</p><p>我们学习数据结构与算法，并不是为了死记硬背几个知识点，我们的目的是建立时间复杂度、空间复杂度的意识，写出高质量的代码，提升编程技能，训练逻辑思维，从而获得更高的薪资回报。</p><p>为什么要学习数据结构与算法，我认为 3 点很重要：</p><p>1、写出性能更佳的代码。 2、算法是求解问题的计算步骤，而程序是用计算机可以理解的语言来描述的算法。 3、长期来看，思考能力是一个人非常重要的核心竞争力，而算法是为数不多能训练思考能力的途径之一。</p><p>是时候提升自己的内功了，这样怼人也会更自信，跳槽也不用畏畏缩缩了。</p><h3 id="四、硬核算法和数据结构学习资料" tabindex="-1"><a class="header-anchor" href="#四、硬核算法和数据结构学习资料" aria-hidden="true">#</a> 四、硬核算法和数据结构学习资料</h3><p><strong>1）视频</strong></p><p>B 站上浙江大学的一个数据结构课非常不错，很系统很经典。每次看这些大学老师的讲课就越觉得考好大学很重要，很多学校的老师，在讲数据结构和算法的时候，自己都不知道自己在讲什么。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/yitiaolong-e2812c94-5945-41ad-adcd-4dbb02fae8d5.png" alt=""></p><p>不得不说，陈越姥姥等人对数据结构和算法这个领域的知识理解是真的透彻，我在听这个课的时候感觉整个人都通透了。</p><p>视频地址：<a href="https://www.bilibili.com/video/BV1JW411i731" target="_blank" rel="noopener noreferrer">https://www.bilibili.com/video/BV1JW411i731<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><p>这里还有个同学在 GitHub 上整理这门课程的所有课件和作业，学习 Java 的小伙伴可以尝试用 Java 完成下作业。</p><blockquote><p>GitHub 地址：<a href="https://github.com/CYBruce/DataStructure_Algorithm_ZJU" target="_blank" rel="noopener noreferrer">https://github.com/CYBruce/DataStructure_Algorithm_ZJU<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><strong>2）书籍</strong></p><p>入门阶段推荐陈小玉老师的《<a href="https://book.douban.com/book/subject/34785269/" target="_blank" rel="noopener noreferrer">趣学数据结构<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>》和《<a href="https://book.douban.com/subject/27109832/" target="_blank" rel="noopener noreferrer">趣学算法<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>》。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/algorithm-2ac7da9b-e812-49d9-8012-5e2f792f87bf.png" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/algorithm-18b8f9d6-cbfa-482f-80a0-57081e3616d8.png" alt=""></p><p>算法领域的经典参考书《<a href="https://book.douban.com/subject/19952400/" target="_blank" rel="noopener noreferrer">算法 4<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>》也非常值得推荐，里面的代码是用 Java 实现的，所以 Java 开发者可以直接选用这本书。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/algorithm-766885af-dfac-452f-b110-c9ca89a0bb9a.png" alt=""></p><p>学霸型人才可以直接刷《<a href="https://book.douban.com/subject/20432061/" target="_blank" rel="noopener noreferrer">算法导论<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>》，严谨全面，可以直接拿来作为研究生阶段的算法课程教材。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/algorithm-fc895095-927c-42a4-a934-f98371a6f376.png" alt=""></p><p><strong>3）开源电子书</strong></p><p>算法方面的开源电子书是真的非常多，这里推荐下《labuladong 的算法小抄》，仓库里面有句话我非常认同——“刷题刷题，刷的是题，培养的是思维”，这个仓库的优势就在于，它的解题思路很完备，我相信可以帮助到不少读者，至少在刷题的时候少走很多弯路。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/algorithm-d573f369-7dff-47a3-9929-46044e419aa8.png" alt=""></p><blockquote><p>GitHub 地址：<a href="https://github.com/labuladong/fucking-algorithm" target="_blank" rel="noopener noreferrer">https://github.com/labuladong/fucking-algorithm<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>当然了，考虑到有些小伙伴需要 PDF 版的，我也准备好了。直接长按识别/扫描下方二维码，关注后回复 「<strong>刷题</strong>」 下载这份 PDF 吧：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongzhonghao.png" alt="扫码关注后回复「刷题」关键字"></p><p>除此之外，再给大家推荐三份高质量的刷题笔记，C/C++、Java、Go 版的全有了！同样可以通过上面的方式获取。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/algorithm-6c0c84be-ba1c-48d0-8ea7-70ef66e04ff2.png" alt=""></p><p><strong>4）在线网站</strong></p><blockquote><p>LeetCode题库：<a href="https://leetcode-cn.com/problemset/all/" target="_blank" rel="noopener noreferrer">https://leetcode-cn.com/problemset/all/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>学习算法的套路非常简单，多看、多练，至于刷题，小伙伴们都知道要刷 LeetCode。只不过 LeetCode 上现在有两千多道题，而且有些题非常难，就算每天刷 10 道，也得刷半年以上。这显然不适合绝大多数的小伙伴，所以我们要找到核心，最重要的题集。</p><p>这里我给大家整理了 100 道面试高频算法题，大多数的小伙伴们按照这个路线去刷就足够应付面试了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/algorithm-c4d31ba3-6d81-4617-a68b-81d935b2a106.png" alt=""></p><blockquote><p>VisuAlgo：<a href="https://visualgo.net/zh" target="_blank" rel="noopener noreferrer">https://visualgo.net/zh<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>算法的难点在于，没办法在脑例子抽象出它的步骤，那 VisuAlgo 就是一个非常值得推荐的可视化算法网站。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/algorithm-b0d17b5d-d13a-46aa-a8b0-6b16772a30a6.png" alt=""></p><p><strong>5）付费专栏</strong></p><p>小争哥在极客时间上开了一门《数据结构与算法之美》的付费专栏，风评非常不错，喜欢的小伙伴可以<a href="http://gk.link/a/11ijz" target="_blank" rel="noopener noreferrer">戳链<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>接去购买。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/algorithm-705c33b5-b90e-49c7-a3bc-a1f3c4630a66.png" alt=""></p><h3 id="五、一点小心得" tabindex="-1"><a class="header-anchor" href="#五、一点小心得" aria-hidden="true">#</a> 五、一点小心得</h3><p>最后来分享一些让你事半功倍的学习技巧。</p><p><strong>第一、边学边练</strong></p><p>想一想，上学期间，除了听老师上课，自习外，最多的是什么？</p><p>对了，考试。</p><p>大大小小的考试，可不只是为了检验成绩，而是将你学会的举一反三，将你不会的拉出来吊打，折磨，直到下次考试的时候更进一步。</p><p>其实不只是学数据结构与算法了，学习任何一门其他的课程都一样，只看只听是完全不中用的，至少要做笔记啊，要把作业给交了呀！</p><p>至于刷题嘛，适量即可，不要总去挑战最难的，容易迷茫。</p><p><strong>第二、多交流</strong></p><p>二哥有个老乡，阿秀，凭借自己的努力考上了研究生，并且在研究生阶段刷了很多题，最终上岸了字节。</p><p>在刷题的过程中，他可不只是自己默默地刷，还结交了很多朋友，看到别人的解法，总是忍不住留言切磋一番，没想到，竟然结识了很多朋友。</p><p>然后大家一起交流互动后，水平都有所提高。思维的碰撞，很重要！</p><p><strong>第三、循序渐进</strong></p><p>道理都懂，但最后坚持下来的总是寥寥无几。</p><p>很重要的一个原因就是，很多人急于求成，总想一嘴吃个大胖子，结果呢？</p><p>学习是逆人性的，不然某音可能就不会这么火了，因为刷视频的快感真的是爽的一塌糊涂。</p><p>所以，学习的时候一定要遵循循序渐进这个真理。</p><p>每天学习到一点，每周学习到两点，每个月学习到三点，在学与忘的过程中反复锤炼，聚少成多。久而久之，你就把知识沉淀成自己的啦。</p><p>祝顺利！</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/xuexiluxian/algorithm.md" 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33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月1日</span><meta property="datePublished" content="2022-03-01T07:46:01.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>学习路线</li><meta property="articleSection" content="学习路线"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag3" role>C语言</li></ul><meta property="keywords" content="C语言"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 9 分钟</span><meta property="timeRequired" content="PT9M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/c.html#_01-阮一峰老师的-c语言入门教程" class="router-link-active router-link-exact-active toc-link level3">01）阮一峰老师的 C语言入门教程</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/c.html#_02-翁恺教授的c语言视频课" class="router-link-active router-link-exact-active toc-link level3">02）翁恺教授的C语言视频课</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/c.html#_03-为什么要学习-c语言" class="router-link-active router-link-exact-active toc-link level3">03）为什么要学习 C语言？</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="c语言学习路线-建议收藏" tabindex="-1"><a class="header-anchor" href="#c语言学习路线-建议收藏" aria-hidden="true">#</a> C语言学习路线（建议收藏👍）</h1><p>我花时间写这篇文章来给大家讲C语言的学习，当然是希望大家真正的学会、学懂C语言，并能够真正感觉到它的用处。</p><p>我们先从 C 语言的入门开始，总共<strong>一本书，两门视频课</strong>。</p><h3 id="_01-阮一峰老师的-c语言入门教程" tabindex="-1"><a class="header-anchor" href="#_01-阮一峰老师的-c语言入门教程" aria-hidden="true">#</a> 01）阮一峰老师的 C语言入门教程</h3><p>阮一峰老师的 C语言入门课，我第一时间就拜读了一遍，受益匪浅！可以说目前我见到的最好的 C语言入门教程了，没有之一！国内的绝大多数高校，大一都会安排 C 语言这门课，阮一峰了老师的这份《C语言入门教程》，绝对是福音。</p><p>我第一时间就整理了一份 PDF 版，截个图大家可以感受下。我对这份教程非常满意，该讲的地方都讲到了，示例也给了很多，对初学者来说，入门必备。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/c-1.png" alt=""></p><p>直接长按识别/扫描下方二维码，关注后回复 「<strong>08</strong>」 下载这份 PDF 吧：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongzhonghao.png" alt="扫码关注后回复「08」关键字"></p><h3 id="_02-翁恺教授的c语言视频课" tabindex="-1"><a class="header-anchor" href="#_02-翁恺教授的c语言视频课" aria-hidden="true">#</a> 02）翁恺教授的C语言视频课</h3><p>可以先看阮一峰老师的《C语言入门教程》，也可以先花一个月的时间，去 mooc 把《程序设计入门 C语言》这门视频课过一遍。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/c-2.png" alt=""></p><blockquote><p>视频地址：<a href="https://www.icourse163.org/course/ZJU-199001" target="_blank" rel="noopener noreferrer">https://www.icourse163.org/course/ZJU-199001<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>看完这套视频，大家至少能学到：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/c-3.jpg" alt=""></p><p>学完这门入门课后，可以再看一下进阶版的。课程以一个 Windows 下的图形游戏程序入手，借助一个 C 语言图形库，展开全部的教学内容，非常有趣。</p><blockquote><p>视频地址：<a href="https://www.icourse163.org/course/ZJU-200001" target="_blank" rel="noopener noreferrer">https://www.icourse163.org/course/ZJU-200001<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>这里给大家一点看视频的小建议哈。</p><p>老老实实听课，做笔记，严格按照翁恺老师的要求完成作业。如果还有余力，那么考虑一下课后的思考题。如果没有思路，先看一下别人的讨论，然后渐渐学会自己总结。</p><p><strong>没有学不会的 C 语言，只有不对的学习姿势</strong>。</p><h3 id="_03-为什么要学习-c语言" tabindex="-1"><a class="header-anchor" href="#_03-为什么要学习-c语言" aria-hidden="true">#</a> 03）为什么要学习 C语言？</h3><p>很多初学者会感到困惑，C 语言既然工作岗位不多，为什么还要学习呢？学习 C语言能做什么？如果这两个问题搞不清楚的话，学习的过程中就容易脱靶。</p><p>C语言是由贝尔实验室的 Dennis Ritchie 在 1969 年~ 1973 年间发明创造的。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/c-1.jpg" alt="C语言之父"></p><p>Dennis Ritchie是这样评价自己的亲儿子的：“<strong>古怪的、有缺陷的，但同时也是一个巨大的成功</strong>。”这句评语还是非常中肯的。</p><p><strong>第一，C语言在计算机领域起到了承上启下的作用</strong>。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/c-4.jpg" alt=""></p><p>C语言非常的简洁，几乎没有任何冗余。上手难度几乎为 0，除了指针难以被新手掌握以外，其他的基础语法都很容易上手。很多编程语言都受到了C语言的影响，比如说 Java、C++、C#、Python、Go 等等，那学会了 C语言，再学习其他的编程语言就会丝滑得多。</p><p>另外，大部分 Unix 内核，以及所有支撑工具和函数库都是用 C语言来编写的。以至于后来几乎所有的操作系统内核都用到了C语言，比如说 Windows、Linux、macOS 等等。那学会了 C语言，就可以学习计算机组成原理、操作系统等等偏基础的计算机基础知识。</p><p>《指环王》里有这样一句话：“one ring to them all”，可以把 ring 换成 language，这个 language 就是C语言。</p><p><strong>第二，C语言可以用于嵌入式系统的开发</strong></p><p>除了用于计算机操作系统的编写，C语言现在主要用于嵌入式系统的开发，汽车、照相机、家用电器等设备的底层系统都是用 C 语言编写的。</p><p>C语言能够直接操作硬件、管理内存、跟操作系统交互，这使得它成为了一种非常接近底层的编程语言，非常适合有极高性能要求的程序。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/c-2.jpg" alt="MATLAB+C语言来控制机械臂"></p><p><strong>04）C语言核心知识点汇总</strong></p><p>为了方便大家的学习，我这里汇总一下 C语言的核心知识点。先来看文字版的：</p><ul><li>数据类型</li><li>运算符和表达式</li><li>输入和输出</li><li>流程控制</li><li>函数</li><li>数组</li><li>指针</li><li>结构体</li><li>文件操作</li><li>内存管理</li></ul><p>再来看详细版的思维导图：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/c-5.png" alt=""></p><p>C语言有两个关键部分：</p><p>第一是语法：也是入门教材里最看重的内容，也就是那些变量、数据类型、分支判断、循环、函数、指针等等。</p><p>第二是函数库：简单来说，函数库就是别人编写好的 C 函数，你可以直接拿来调用，比如说调用 <code>printf()</code> 函数就可以在屏幕上打印。很多人可能觉得库函数不重要，都是别人封装好的，只要记住函数名就可以了，但其实我想表达的是，库函数才是你学习 C语言并将其应用于实践的关键。</p><p>因为学会调用别人的库函数（例如malloc函数、calloc函数、realloc函数、free函数），才有机会写出自己的库函数，否则从零开始撸实在是太不现实了。</p><p><strong>05）学习 C语言的一些建议</strong></p><p>一般来说，学习 C语言可以分为以下 5 个阶段：</p><ul><li>1）学习基础语法</li><li>2）学会使用 C语言自带的库函数，比如说 printf 级别的</li><li>3）学会使用一些基本的数据结构与算法</li><li>4）有了一定的 C语言基础，开始学习一些计算机专业的核心知识，比如说操作系统、计算机组成原理等</li><li>5）动手做出一些 lab，造一些简单的轮子，实现一些简单的小应用</li></ul><p>这里推荐 2 个蓝桥云课上的免费小 lab，大家可以动手练起来。</p><p><strong>1）可以进行加减乘除的计算器</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/c-6.jpg" alt=""></p><blockquote><p>课程地址：<a href="https://www.lanqiao.cn/courses/75" target="_blank" rel="noopener noreferrer">https://www.lanqiao.cn/courses/75<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>通过这个 lab，大家可以学到：</p><ul><li>计算器设计思路</li><li>C 语言的格式检查</li><li>C 语言输入与输出</li></ul><p><strong>2）实现一个属于自己的编程语言</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/c-7.png" alt=""></p><blockquote><p>课程地址：<a href="https://www.shiyanlou.com/courses/670" target="_blank" rel="noopener noreferrer">https://www.shiyanlou.com/courses/670<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>通过这个 lab，大家可以学到：</p><ul><li>解析器</li><li>波兰表达式</li><li>解析树的计算</li><li>S-Expression</li><li>变量定义和使用</li><li>条件判断</li><li>正则表达式</li><li>递归分析长字符串</li><li>出错处理</li><li>Q-Expression</li><li>函数</li><li>字符串</li></ul><p>这个 lab 翻译自国外的 build your own lisp：</p><blockquote><p><a href="https://buildyourownlisp.com/" target="_blank" rel="noopener noreferrer">https://buildyourownlisp.com/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>如果英语功底比较扎实的话，可以直接看原版。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/c-8.png" alt=""></p><p>认真跟着做这些 lab，真本领就学到手了。</p><p><strong>06）学习 C语言的其他资源</strong></p><p>给初中生看的《啊哈 C语言》，简单易懂，生动有趣，虽然只能学到 C语言的冰山一角，但也值了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/c-9.png" alt=""></p><p>给高中生、大一新生看的入门书《c primer plus》，语法全覆盖，细节多，知识点讲的清楚，缺点是琐碎，细节弯弯绕。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/c-10.png" alt=""></p><p>还有一本《C 程序设计语言》，这本书的作者是 C语言之父，所以全书讲的都是 C语言的核心。代码示例大多都是库函数的实现方法，内容简洁明了，干净利落，没有废话。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/c-11.png" alt=""></p><p>给</p><ul><li>想成为大佬的人</li><li>想进阶 C语言</li><li>想理解指针和内存</li><li>想搞懂 Linux 内核</li><li>想搞基础设备的</li><li>想搞单片机的</li><li>想进微软改进 Windows 的</li><li>想搞贴近生活硬件的，比如说闹钟、计时器、简单的机器人</li></ul><p>看的进阶书《C 陷阱与缺陷》、《C 专家编程》、《C 和指针》</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/c-12.png" alt=""></p><p>尽管我不推荐大家看书入门，但我知道很多读者还是喜欢通过看书的方式学习。直接长按扫描下方二维码，关注后回复 「<strong>C</strong>」 下载这 PDF 版吧：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongzhonghao.png" alt="（长按扫码识别）"></p><p>更多 C语言的学习资料，可以直接戳我整理的这个 GitHub/码云仓库——📚程序员必读书单整理，附下载地址，里面有大量的 C语言学习资料。</p><ul><li>GitHub 地址：<a href="https://github.com/itwanger/JavaBooks#c" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/JavaBooks<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li>码云地址：<a href="https://gitee.com/itwanger/JavaBooks#c" target="_blank" rel="noopener noreferrer">https://gitee.com/itwanger/JavaBooks<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/c-books.jpg" alt=""></p><p>简单罗列一下：</p><ul><li>深度探索C 对象模型</li><li>数据结构与算法分析--C语言描述</li><li>C Primer Plus（第五版）</li><li>C程序设计语言（第二版，中文版）</li><li>C和指针</li><li>C陷阱与缺陷</li><li>C专家编程</li></ul><hr><p>到此为止，C语言的重点就全部划出来了，剩下的学习就交给大家了。最后，二哥再唠叨几句：</p><p>1、自学才是硬道理。强大的自学能力是独自解决问题的根本，程序员需要拥有强大的自学能力。</p><p>2、一个人可以走得很快，但一群人才能走的更远。最好加入一些有氛围的技术交流群，结交一两个有能力的同阶段的人，切磋精进一下。</p><p>3、入门阶段，coding 为主，视频为辅，不要搞反了。记住这个公式：只看+不练=假把戏。</p><p>4、如果以后不想当一个优秀的工程师，不想在计算机这条道路上走得更远，只想躺平当个平平淡淡的码农，那么我推荐一条路：跟着老师一步步走，跟着大学的教学方案，一步步走就行了。</p><p>上面这4条建议其实不仅适用于C语言的学习，还适用于其他任何一门编程语言的学习。如果能够这样坚持下去，几年后，你将是一名善于解决实际问题的工程师，而不是一名普普通通的码农。</p><p>以上，希望能帮助到大家！</p><p><em>没有什么使我停留——除了目的，纵然岸旁有玫瑰、有绿荫、有宁静的港湾，我是不系之舟</em>。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/xuexiluxian/c.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 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class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/xuexiluxian/algorithm.html" class="nav-link sidebar-link sidebar-page" aria-label="算法和数据结构学习路线"><!---->算法和数据结构学习路线<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->C语言学习路线（建议收藏👍）</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 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106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>学习路线</li><meta property="articleSection" content="学习路线"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag3" role>C语言</li></ul><meta property="keywords" content="C语言"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 9 分钟</span><meta property="timeRequired" content="PT9M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/c.html#_01-阮一峰老师的-c语言入门教程" class="router-link-active router-link-exact-active toc-link level3">01）阮一峰老师的 C语言入门教程</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/c.html#_02-翁恺教授的c语言视频课" class="router-link-active router-link-exact-active toc-link level3">02）翁恺教授的C语言视频课</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/c.html#_03-为什么要学习-c语言" class="router-link-active router-link-exact-active toc-link level3">03）为什么要学习 C语言？</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="c语言学习路线-建议收藏" tabindex="-1"><a class="header-anchor" href="#c语言学习路线-建议收藏" aria-hidden="true">#</a> C语言学习路线（建议收藏👍）</h1><p>我花时间写这篇文章来给大家讲C语言的学习，当然是希望大家真正的学会、学懂C语言，并能够真正感觉到它的用处。</p><p>我们先从 C 语言的入门开始，总共<strong>一本书，两门视频课</strong>。</p><h3 id="_01-阮一峰老师的-c语言入门教程" tabindex="-1"><a class="header-anchor" href="#_01-阮一峰老师的-c语言入门教程" aria-hidden="true">#</a> 01）阮一峰老师的 C语言入门教程</h3><p>阮一峰老师的 C语言入门课，我第一时间就拜读了一遍，受益匪浅！可以说目前我见到的最好的 C语言入门教程了，没有之一！国内的绝大多数高校，大一都会安排 C 语言这门课，阮一峰了老师的这份《C语言入门教程》，绝对是福音。</p><p>我第一时间就整理了一份 PDF 版，截个图大家可以感受下。我对这份教程非常满意，该讲的地方都讲到了，示例也给了很多，对初学者来说，入门必备。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/c-1.png" alt=""></p><p>直接长按识别/扫描下方二维码，关注后回复 「<strong>08</strong>」 下载这份 PDF 吧：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongzhonghao.png" alt="扫码关注后回复「08」关键字"></p><h3 id="_02-翁恺教授的c语言视频课" tabindex="-1"><a class="header-anchor" href="#_02-翁恺教授的c语言视频课" aria-hidden="true">#</a> 02）翁恺教授的C语言视频课</h3><p>可以先看阮一峰老师的《C语言入门教程》，也可以先花一个月的时间，去 mooc 把《程序设计入门 C语言》这门视频课过一遍。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/c-2.png" alt=""></p><blockquote><p>视频地址：<a href="https://www.icourse163.org/course/ZJU-199001" target="_blank" rel="noopener noreferrer">https://www.icourse163.org/course/ZJU-199001<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>看完这套视频，大家至少能学到：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/c-3.jpg" alt=""></p><p>学完这门入门课后，可以再看一下进阶版的。课程以一个 Windows 下的图形游戏程序入手，借助一个 C 语言图形库，展开全部的教学内容，非常有趣。</p><blockquote><p>视频地址：<a href="https://www.icourse163.org/course/ZJU-200001" target="_blank" rel="noopener noreferrer">https://www.icourse163.org/course/ZJU-200001<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>这里给大家一点看视频的小建议哈。</p><p>老老实实听课，做笔记，严格按照翁恺老师的要求完成作业。如果还有余力，那么考虑一下课后的思考题。如果没有思路，先看一下别人的讨论，然后渐渐学会自己总结。</p><p><strong>没有学不会的 C 语言，只有不对的学习姿势</strong>。</p><h3 id="_03-为什么要学习-c语言" tabindex="-1"><a class="header-anchor" href="#_03-为什么要学习-c语言" aria-hidden="true">#</a> 03）为什么要学习 C语言？</h3><p>很多初学者会感到困惑，C 语言既然工作岗位不多，为什么还要学习呢？学习 C语言能做什么？如果这两个问题搞不清楚的话，学习的过程中就容易脱靶。</p><p>C语言是由贝尔实验室的 Dennis Ritchie 在 1969 年~ 1973 年间发明创造的。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/c-1.jpg" alt="C语言之父"></p><p>Dennis Ritchie是这样评价自己的亲儿子的：“<strong>古怪的、有缺陷的，但同时也是一个巨大的成功</strong>。”这句评语还是非常中肯的。</p><p><strong>第一，C语言在计算机领域起到了承上启下的作用</strong>。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/c-4.jpg" alt=""></p><p>C语言非常的简洁，几乎没有任何冗余。上手难度几乎为 0，除了指针难以被新手掌握以外，其他的基础语法都很容易上手。很多编程语言都受到了C语言的影响，比如说 Java、C++、C#、Python、Go 等等，那学会了 C语言，再学习其他的编程语言就会丝滑得多。</p><p>另外，大部分 Unix 内核，以及所有支撑工具和函数库都是用 C语言来编写的。以至于后来几乎所有的操作系统内核都用到了C语言，比如说 Windows、Linux、macOS 等等。那学会了 C语言，就可以学习计算机组成原理、操作系统等等偏基础的计算机基础知识。</p><p>《指环王》里有这样一句话：“one ring to them all”，可以把 ring 换成 language，这个 language 就是C语言。</p><p><strong>第二，C语言可以用于嵌入式系统的开发</strong></p><p>除了用于计算机操作系统的编写，C语言现在主要用于嵌入式系统的开发，汽车、照相机、家用电器等设备的底层系统都是用 C 语言编写的。</p><p>C语言能够直接操作硬件、管理内存、跟操作系统交互，这使得它成为了一种非常接近底层的编程语言，非常适合有极高性能要求的程序。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/c-2.jpg" alt="MATLAB+C语言来控制机械臂"></p><p><strong>04）C语言核心知识点汇总</strong></p><p>为了方便大家的学习，我这里汇总一下 C语言的核心知识点。先来看文字版的：</p><ul><li>数据类型</li><li>运算符和表达式</li><li>输入和输出</li><li>流程控制</li><li>函数</li><li>数组</li><li>指针</li><li>结构体</li><li>文件操作</li><li>内存管理</li></ul><p>再来看详细版的思维导图：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/c-5.png" alt=""></p><p>C语言有两个关键部分：</p><p>第一是语法：也是入门教材里最看重的内容，也就是那些变量、数据类型、分支判断、循环、函数、指针等等。</p><p>第二是函数库：简单来说，函数库就是别人编写好的 C 函数，你可以直接拿来调用，比如说调用 <code>printf()</code> 函数就可以在屏幕上打印。很多人可能觉得库函数不重要，都是别人封装好的，只要记住函数名就可以了，但其实我想表达的是，库函数才是你学习 C语言并将其应用于实践的关键。</p><p>因为学会调用别人的库函数（例如malloc函数、calloc函数、realloc函数、free函数），才有机会写出自己的库函数，否则从零开始撸实在是太不现实了。</p><p><strong>05）学习 C语言的一些建议</strong></p><p>一般来说，学习 C语言可以分为以下 5 个阶段：</p><ul><li>1）学习基础语法</li><li>2）学会使用 C语言自带的库函数，比如说 printf 级别的</li><li>3）学会使用一些基本的数据结构与算法</li><li>4）有了一定的 C语言基础，开始学习一些计算机专业的核心知识，比如说操作系统、计算机组成原理等</li><li>5）动手做出一些 lab，造一些简单的轮子，实现一些简单的小应用</li></ul><p>这里推荐 2 个蓝桥云课上的免费小 lab，大家可以动手练起来。</p><p><strong>1）可以进行加减乘除的计算器</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/c-6.jpg" alt=""></p><blockquote><p>课程地址：<a href="https://www.lanqiao.cn/courses/75" target="_blank" rel="noopener noreferrer">https://www.lanqiao.cn/courses/75<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>通过这个 lab，大家可以学到：</p><ul><li>计算器设计思路</li><li>C 语言的格式检查</li><li>C 语言输入与输出</li></ul><p><strong>2）实现一个属于自己的编程语言</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/c-7.png" alt=""></p><blockquote><p>课程地址：<a href="https://www.shiyanlou.com/courses/670" target="_blank" rel="noopener noreferrer">https://www.shiyanlou.com/courses/670<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>通过这个 lab，大家可以学到：</p><ul><li>解析器</li><li>波兰表达式</li><li>解析树的计算</li><li>S-Expression</li><li>变量定义和使用</li><li>条件判断</li><li>正则表达式</li><li>递归分析长字符串</li><li>出错处理</li><li>Q-Expression</li><li>函数</li><li>字符串</li></ul><p>这个 lab 翻译自国外的 build your own lisp：</p><blockquote><p><a href="https://buildyourownlisp.com/" target="_blank" rel="noopener noreferrer">https://buildyourownlisp.com/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>如果英语功底比较扎实的话，可以直接看原版。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/c-8.png" alt=""></p><p>认真跟着做这些 lab，真本领就学到手了。</p><p><strong>06）学习 C语言的其他资源</strong></p><p>给初中生看的《啊哈 C语言》，简单易懂，生动有趣，虽然只能学到 C语言的冰山一角，但也值了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/c-9.png" alt=""></p><p>给高中生、大一新生看的入门书《c primer plus》，语法全覆盖，细节多，知识点讲的清楚，缺点是琐碎，细节弯弯绕。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/c-10.png" alt=""></p><p>还有一本《C 程序设计语言》，这本书的作者是 C语言之父，所以全书讲的都是 C语言的核心。代码示例大多都是库函数的实现方法，内容简洁明了，干净利落，没有废话。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/c-11.png" alt=""></p><p>给</p><ul><li>想成为大佬的人</li><li>想进阶 C语言</li><li>想理解指针和内存</li><li>想搞懂 Linux 内核</li><li>想搞基础设备的</li><li>想搞单片机的</li><li>想进微软改进 Windows 的</li><li>想搞贴近生活硬件的，比如说闹钟、计时器、简单的机器人</li></ul><p>看的进阶书《C 陷阱与缺陷》、《C 专家编程》、《C 和指针》</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/c-12.png" alt=""></p><p>尽管我不推荐大家看书入门，但我知道很多读者还是喜欢通过看书的方式学习。直接长按扫描下方二维码，关注后回复 「<strong>C</strong>」 下载这 PDF 版吧：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongzhonghao.png" alt="（长按扫码识别）"></p><p>更多 C语言的学习资料，可以直接戳我整理的这个 GitHub/码云仓库——📚程序员必读书单整理，附下载地址，里面有大量的 C语言学习资料。</p><ul><li>GitHub 地址：<a href="https://github.com/itwanger/JavaBooks#c" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/JavaBooks<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li>码云地址：<a href="https://gitee.com/itwanger/JavaBooks#c" target="_blank" rel="noopener noreferrer">https://gitee.com/itwanger/JavaBooks<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/c-books.jpg" alt=""></p><p>简单罗列一下：</p><ul><li>深度探索C 对象模型</li><li>数据结构与算法分析--C语言描述</li><li>C Primer Plus（第五版）</li><li>C程序设计语言（第二版，中文版）</li><li>C和指针</li><li>C陷阱与缺陷</li><li>C专家编程</li></ul><hr><p>到此为止，C语言的重点就全部划出来了，剩下的学习就交给大家了。最后，二哥再唠叨几句：</p><p>1、自学才是硬道理。强大的自学能力是独自解决问题的根本，程序员需要拥有强大的自学能力。</p><p>2、一个人可以走得很快，但一群人才能走的更远。最好加入一些有氛围的技术交流群，结交一两个有能力的同阶段的人，切磋精进一下。</p><p>3、入门阶段，coding 为主，视频为辅，不要搞反了。记住这个公式：只看+不练=假把戏。</p><p>4、如果以后不想当一个优秀的工程师，不想在计算机这条道路上走得更远，只想躺平当个平平淡淡的码农，那么我推荐一条路：跟着老师一步步走，跟着大学的教学方案，一步步走就行了。</p><p>上面这4条建议其实不仅适用于C语言的学习，还适用于其他任何一门编程语言的学习。如果能够这样坚持下去，几年后，你将是一名善于解决实际问题的工程师，而不是一名普普通通的码农。</p><p>以上，希望能帮助到大家！</p><p><em>没有什么使我停留——除了目的，纵然岸旁有玫瑰、有绿荫、有宁静的港湾，我是不系之舟</em>。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/xuexiluxian/c.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 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33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月1日</span><meta property="datePublished" content="2022-03-01T07:46:01.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>学习路线</li><meta property="articleSection" content="学习路线"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag8" role>C++</li></ul><meta property="keywords" content="C++"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 3 分钟</span><meta property="timeRequired" content="PT3M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="c-学习路线-建议收藏" tabindex="-1"><a class="header-anchor" href="#c-学习路线-建议收藏" aria-hidden="true">#</a> C++学习路线（建议收藏👍）</h1><p>学习 C++ 语法，首推《C++ Primer 第五版》。我在参加第一份工作的时候，就买过一本《C++ Primer 第四版》，这本书一直不舍得扔，尽管它已经非常破了，但我们之间的感情是深厚的，毕竟跟随我辗转了好几个城市了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/ccc-primer-book.png" alt=""></p><p><em>是不是一下子就暴露自己工作年限了</em>？</p><p>这本书非常全面地讲解了 C++ 的语法以及 C++ 的各种特性，如果能坚持看完的话，帮助会很大。如果时间比较充分的话，建议至少看两遍。如果时间比较紧张的话，至少通读一遍吧，要能把握住这本书的大体框架，然后结合个人的实际情况选择性地看一些重点章节。</p><p>然后是《Effective C++》，侯捷老师译的，这本书主要讲解了编写 C++ 代码需要注意的一些条款，和《Effective Java》 属于同一个系列。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/ccc-2.jpg" alt=""></p><p>第三本是《STL源码剖析》这本书，侯捷老师写的，这本书讲了C++的底层实现，包括各种容器（vector、list、heap、deque、Red Black tree、hash table、set/map）的实现、各种常见算法（排序、查找、排列组合、数据移动与复制技术）的实现等。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/ccc-3.png" alt=""></p><p>第四本《深度探索C++对象模型》，侯捷老师译的，这本书讲解了 C++ 面向对象特性的底层实现机制，读起来虽然有点晦涩，但读完后就会搞明白“代码跑起来的时候实际发生了什么”。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/ccc-4.jpg" alt=""></p><p>既然有三本书都是侯捷老师的，那再刷一刷侯捷老师的视频，岂不是效果更佳？不过，由于涉及到版权，国内的 B 站、A 站都下架了相关的视频资源，包括：</p><ul><li>《C++面向对象高级编程》</li><li>《STL》</li><li>《C++ 内存管理》</li><li>《C++ 11 新特性》</li><li>《C++ 程序的生前死后》</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/ccc-5.png" alt=""></p><p>我从网上 down 了一份，保存到了本地。需要的小伙伴请长按识别/扫描下方的二维码关注作者的原创公众号「<strong>沉默王二</strong>」回复关键字「<strong>cpp</strong>」就可以拉取到了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongzhonghao.png" alt="回复关键字「cpp」"></p><p>更多 C++ 的学习资料，可以直接戳我整理的这个 GitHub/码云仓库——📚程序员必读书单整理，附下载地址，里面有大量的 C++ 学习资料。</p><ul><li>GitHub 地址：<a href="https://github.com/itwanger/JavaBooks#c-1" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/JavaBooks<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li>码云地址：<a href="https://gitee.com/itwanger/JavaBooks#c-1" target="_blank" rel="noopener noreferrer">https://gitee.com/itwanger/JavaBooks<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/cpp-books.jpg" alt=""></p><p>简单罗列一下：</p><ul><li>大规模c++程序设计</li><li>牛客校招面试题（附答案与解析）c++篇</li><li>深度探索C++对象模型 PDF中文清晰版</li><li>深入理解c11(c11新特性解析与应用)</li><li>C++ Primer 第五版--- 高清版</li><li>C++语言的设计和演化</li><li>Effective.Modern.C++ - 中文版</li><li>Effective+STL中文版：50条有效使用STL的经验</li><li>More Effective C++中文</li><li>STL源码剖析--侯捷</li></ul></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a 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class="nav-link sidebar-link sidebar-page" aria-label="蓝桥杯学习路线"><!---->蓝桥杯学习路线<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/xuexiluxian/algorithm.html" class="nav-link sidebar-link sidebar-page" aria-label="算法和数据结构学习路线"><!---->算法和数据结构学习路线<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->C++学习路线（建议收藏👍）</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月1日</span><meta property="datePublished" content="2022-03-01T07:46:01.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>学习路线</li><meta property="articleSection" content="学习路线"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag8" role>C++</li></ul><meta property="keywords" content="C++"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 3 分钟</span><meta property="timeRequired" content="PT3M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="c-学习路线-建议收藏" tabindex="-1"><a class="header-anchor" href="#c-学习路线-建议收藏" aria-hidden="true">#</a> C++学习路线（建议收藏👍）</h1><p>学习 C++ 语法，首推《C++ Primer 第五版》。我在参加第一份工作的时候，就买过一本《C++ Primer 第四版》，这本书一直不舍得扔，尽管它已经非常破了，但我们之间的感情是深厚的，毕竟跟随我辗转了好几个城市了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/ccc-primer-book.png" alt=""></p><p><em>是不是一下子就暴露自己工作年限了</em>？</p><p>这本书非常全面地讲解了 C++ 的语法以及 C++ 的各种特性，如果能坚持看完的话，帮助会很大。如果时间比较充分的话，建议至少看两遍。如果时间比较紧张的话，至少通读一遍吧，要能把握住这本书的大体框架，然后结合个人的实际情况选择性地看一些重点章节。</p><p>然后是《Effective C++》，侯捷老师译的，这本书主要讲解了编写 C++ 代码需要注意的一些条款，和《Effective Java》 属于同一个系列。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/ccc-2.jpg" alt=""></p><p>第三本是《STL源码剖析》这本书，侯捷老师写的，这本书讲了C++的底层实现，包括各种容器（vector、list、heap、deque、Red Black tree、hash table、set/map）的实现、各种常见算法（排序、查找、排列组合、数据移动与复制技术）的实现等。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/ccc-3.png" alt=""></p><p>第四本《深度探索C++对象模型》，侯捷老师译的，这本书讲解了 C++ 面向对象特性的底层实现机制，读起来虽然有点晦涩，但读完后就会搞明白“代码跑起来的时候实际发生了什么”。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/ccc-4.jpg" alt=""></p><p>既然有三本书都是侯捷老师的，那再刷一刷侯捷老师的视频，岂不是效果更佳？不过，由于涉及到版权，国内的 B 站、A 站都下架了相关的视频资源，包括：</p><ul><li>《C++面向对象高级编程》</li><li>《STL》</li><li>《C++ 内存管理》</li><li>《C++ 11 新特性》</li><li>《C++ 程序的生前死后》</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/ccc-5.png" alt=""></p><p>我从网上 down 了一份，保存到了本地。需要的小伙伴请长按识别/扫描下方的二维码关注作者的原创公众号「<strong>沉默王二</strong>」回复关键字「<strong>cpp</strong>」就可以拉取到了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongzhonghao.png" alt="回复关键字「cpp」"></p><p>更多 C++ 的学习资料，可以直接戳我整理的这个 GitHub/码云仓库——📚程序员必读书单整理，附下载地址，里面有大量的 C++ 学习资料。</p><ul><li>GitHub 地址：<a href="https://github.com/itwanger/JavaBooks#c-1" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/JavaBooks<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li>码云地址：<a href="https://gitee.com/itwanger/JavaBooks#c-1" target="_blank" rel="noopener noreferrer">https://gitee.com/itwanger/JavaBooks<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/cpp-books.jpg" alt=""></p><p>简单罗列一下：</p><ul><li>大规模c++程序设计</li><li>牛客校招面试题（附答案与解析）c++篇</li><li>深度探索C++对象模型 PDF中文清晰版</li><li>深入理解c11(c11新特性解析与应用)</li><li>C++ Primer 第五版--- 高清版</li><li>C++语言的设计和演化</li><li>Effective.Modern.C++ - 中文版</li><li>Effective+STL中文版：50条有效使用STL的经验</li><li>More Effective C++中文</li><li>STL源码剖析--侯捷</li></ul></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/xuexiluxian/ccc.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 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disable"></nav><div class="page-title"><h1><!---->Go学习路线（建议收藏👍）</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 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pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>学习路线</li><meta property="articleSection" content="学习路线"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag0" role>Go</li></ul><meta property="keywords" content="Go"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 10 分钟</span><meta property="timeRequired" content="PT10M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/go.html#一、go-的优势和劣势" class="router-link-active router-link-exact-active toc-link level3">一、Go 的优势和劣势</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/go.html#二、为什么会要求-java-转-go-呢" class="router-link-active router-link-exact-active toc-link level3">二、为什么会要求 Java 转 Go 呢？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/go.html#三、go-语言该怎么学习呢" class="router-link-active router-link-exact-active toc-link level3">三、Go 语言该怎么学习呢？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/go.html#四、java-和-go-如何做取舍" class="router-link-active router-link-exact-active toc-link level3">四、Java 和 Go 如何做取舍？</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="go学习路线-建议收藏" tabindex="-1"><a class="header-anchor" href="#go学习路线-建议收藏" aria-hidden="true">#</a> Go学习路线（建议收藏👍）</h1><p>大家好，我是二哥呀！最近又有一个读者来咨询我的建议：<strong>应届生，要求 Java 进去后转 Go，问我咋样？</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/go-1.png" alt=""></p><p>据我自己的印象，前前后后有十个读者来问过我这个问题了。一方面 Java 就业岗位确实多，薪资也给力；另外一方面，Go 确实很有潜力。</p><p>尤其是国内的字节跳动，Go 在常用的编程语言中占比是最高的，大部分产品的后端都在使用 Go。</p><p>那作为贴心的二哥，必须得给大家梳理一波思路了，希望能给需要的读者一点点帮助和启发~</p><h3 id="一、go-的优势和劣势" tabindex="-1"><a class="header-anchor" href="#一、go-的优势和劣势" aria-hidden="true">#</a> 一、Go 的优势和劣势</h3><p>Go 语言诞生于 2009 年，发展到现在，已经 12 岁了（应该没算错吧😭）。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/go-2.png" alt=""></p><p>很多明星级的开源产品，比如说 Kubernetes、Docker等，都是基于 Go 语言编写的。再加上近些年来微服务架构和云原生技术的普及，也大大的带火了 Go 这门编程语言，使其在 C/C++ 和 Java 中杀出了一条血路。</p><p>再加上从 2010 年 5 月起，Google 开始将 Go 语言投入到后端基础设施的实际开发中，很多我们能耳熟能详的应用都有使用 Go 语言，比如说谷歌地图、Google Cloud 等。</p><p>国内的字节跳动，就别提了。</p><p>Google 和字节两家大厂对 Go 的大力投入，在一定程度上又加速了 Go 这门编程语言的发展。</p><p>目前，使用 Go 语言的公司越来越多了，阿里、百度、腾讯、小米这些互联网大厂也在积极拥抱。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/go-3.png" alt=""></p><p>这使得 Go 工程师的薪资待遇也得到了很大程度上提高。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/go-4.png" alt=""></p><p>当然了，目前基本上除了大厂，很少有其他中小型公司用 Go，因为 Go 的生态还比不上 Java，没有 Java 那么丰富健全，中小公司的投入产出比比较低。大厂有人有钱，愿意在 Go 上投入成本。</p><p>另外，Go 也没有像外界吹捧的那么牛叉，就编程语言的排行榜上来看，Go 还是个滴滴（Python、C/C++、Java、C# 这些仍然是前排），有待发展。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/go-5.jpg" alt=""></p><h3 id="二、为什么会要求-java-转-go-呢" tabindex="-1"><a class="header-anchor" href="#二、为什么会要求-java-转-go-呢" aria-hidden="true">#</a> 二、为什么会要求 Java 转 Go 呢？</h3><p>最直接的原因就是 Go 这边比较缺人，而 Java 这边基本上是招聘的多，竞聘的更多。</p><p>熟练掌握 Java 的一般都比较能打，转 Go 后作战能力肯定也是不容小觑。</p><p>对于我们国内的开发环境来说，Java 的确是顶流，我个人也是 Java 的重度使用者，但<strong>我私底下也在学习其他的编程语言，因为只有这样，才能最大程度上保持自己的竞争力</strong>。</p><p>每种编程语言只要能发挥出它最大的优势，就是值得我们去学习和使用的。</p><p>再者，编程语言这东西，你掌握了一个，再学另外一个也会很快的。</p><p>截止到目前，我学过 Python、C/C++、Go、JavaScript 等等，因为有 Java 语言的底子在，学这些编程语言的时候，阻力基本上就像在泳池里游泳一样，一开始会感觉有点困难，等熟练了之后，会感觉很舒服。</p><h3 id="三、go-语言该怎么学习呢" tabindex="-1"><a class="header-anchor" href="#三、go-语言该怎么学习呢" aria-hidden="true">#</a> 三、Go 语言该怎么学习呢？</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/go-6.png" alt=""></p><p>不管怎么说，Go 语言的确是值得去学习的。如果公司确实需要转 Go 岗，也完全没有必要抗拒。</p><p>这里给大家推荐一个 Go 语言的学习路线图，如果你想要成为一名Go语言的开发者的话，可以沿着这张图里面的路径去学习。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/go-7.jpg" alt=""></p><p>接下来给大家推荐一些 Go 语言的学习资料，全部免费开源，是我肝了两个大夜精挑细选出来的。</p><p>记住一点：<strong>不管是学习哪一门编程语言，顺序基本上就是视频入门+教程/书籍巩固+项目练习</strong>。</p><p><strong>1）视频课</strong></p><p><strong>第一套视频：《Go 编程基础》</strong>，主要面向 Go 语言新手级别的学习者。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/go-8.jpg" alt=""></p><blockquote><p>课程地址：<a href="https://github.com/unknwon/go-fundamental-programming" target="_blank" rel="noopener noreferrer">https://github.com/unknwon/go-fundamental-programming<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><strong>第二套视频：尚硅谷 Go 入门到实战教程</strong>，采用真实案例，从理论到实践，一步一步将 Go 的核心编程技术、编程思想、底层实现融会贯通。</p><p>虽然尚硅谷是一家培训机构，但在 B 站上公开的一些课程还真的是挺香的，学 Java 的同学可能很大一部分都看过宋红康老师的课，YYDS！</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/go-9.jpg" alt=""></p><blockquote><p>视频地址：<a href="https://www.bilibili.com/video/BV1ME411Y71o" target="_blank" rel="noopener noreferrer">https://www.bilibili.com/video/BV1ME411Y71o<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><strong>2）教程/书籍</strong></p><p><strong>第一套教程：Go 语言之旅</strong>，这是一个对初学者极其友好的在线网站，并且每一步都可以直接运行代码并看到效果。初学阶段，最重要的就是能通过手敲代码感受到学习的成果。</p><p>点击右侧的菜单可以快速浏览教程的所有内容，非常方便。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/go-10.jpg" alt=""></p><blockquote><p>教程地址：<a href="http://tour.studygolang.com/welcome/1" target="_blank" rel="noopener noreferrer">http://tour.studygolang.com/welcome/1<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><strong>第二套教程：LeetCode-Go</strong>，一本 LeetCode 的刷题笔记，代码是用 Go 语言实现的，收录了超过 500 道题的题解思路和代码，代码方案都是效率超高的“标准答案”：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/go-11.jpg" alt=""></p><blockquote><p>教程地址：<a href="https://books.halfrost.com/leetcode/" target="_blank" rel="noopener noreferrer">https://books.halfrost.com/leetcode/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><strong>第三套教程：《Go 语言设计与实现》</strong>，这份教程的内容可以分成四个部分：</p><ul><li>编译原理</li><li>运行时</li><li>基础知识</li><li>进阶知识</li></ul><p>几乎覆盖了 Go 语言从编译到运行的方方面面，读完后能对 Go 语言有更加整体和深刻的认识。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/go-12.jpg" alt=""></p><blockquote><p>在线地址：<a href="https://draveness.me/golang/" target="_blank" rel="noopener noreferrer">https://draveness.me/golang/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>是开发者内功修炼号主飞哥给我推荐的，当时看完后就大为震撼。目前我看作者已经出版了纸质书。</p><p><strong>第四套教程：《玩转 GO》</strong>，内容包括但不限于并发、网络编程、垃圾回收、组合、Go UNIX系统编程、基本数据类型（Array,Slice,Map）、Go源码、反射，接口，类型方法等高级概念。</p><p>不过遗憾的是，在线阅读地址挂了，我还提交了一个 issue：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/go-13.jpg" alt=""></p><p>不过幸好我备份了一份离线版 PDF，里面的内容还是非常完整的：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/go-14.jpg" alt=""></p><p>需要的小伙伴请长按识别/扫描下方的二维码关注作者的原创公众号「<strong>沉默王二</strong>」回复关键字「<strong>go</strong>」就可以拉取到了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongzhonghao.png" alt="扫码关注后回复「go」关键字"></p><p><strong>第五套教程：Go标准库文档</strong>，可以查询每个API的具体使用方式，这也是 Go 开发者的必备手册。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/go-15.jpg" alt=""></p><blockquote><p>在线地址：<a href="https://studygolang.com/static/pkgdoc/main.html" target="_blank" rel="noopener noreferrer">https://studygolang.com/static/pkgdoc/main.html<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>再推荐一些比较优质的纸质书籍吧。</p><p><strong>第一本：Go语言实战</strong>，这本书关注于 Go 语言的规范和实现，涉及的内容包括语法、Go 的类型系统、并发、通道和测试等主题。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/go-16.jpg" alt=""></p><p><strong>第二本：《Go 语言学习笔记》</strong>，上卷专注于语言规范相关细节，下卷专注于对运行时源码做出深度剖析，诸如内存分配、垃圾回收和并发调度等。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/go-17.jpg" alt=""></p><p><strong>第三本：《Go Web 编程》</strong>，这本书以一个网络论坛作为例子，讲解了如何使用请求处理器、多路复用器、模板引擎、存储系统等核心组件去构建一个 Go 的 Web 应用。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/go-18.jpg" alt=""></p><p>下面是我根据一位拿到大厂 offer 的师弟菜饼提供的学习资料整理出来的书单，相信对你学习 go 语言会很有帮助的。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/go-4b3b67f3-ebe0-4311-8c7c-7e87f89ccdc7.jpg" alt=""></p><p>需要的小伙伴请长按识别/扫描下方的二维码关注作者的原创公众号「<strong>沉默王二</strong>」回复关键字「<strong>go</strong>」就可以拉取到了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongzhonghao.png" alt="扫码关注后回复「go」关键字"></p><p><strong>3）实战项目</strong></p><p><strong>第一个项目：seaweedfs</strong>，GitHub 上星标 13k+，这是一个分布式文件系统，基于 Go 开发，部署方便，使用简单，功能强大。</p><blockquote><p>地址：<a href="https://github.com/chrislusf/seaweedfs" target="_blank" rel="noopener noreferrer">https://github.com/chrislusf/seaweedfs<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><strong>第二个项目：seaweedfs</strong>，GitHub 上星标 13k+，这是一个自带文件浏览器的网盘服务，支持文件浏览、生成分享链接、批量上传、创建文件夹等功能、用户系统。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/go-20.jpg" alt=""></p><blockquote><p>地址：<a href="https://github.com/filebrowser/filebrowser" target="_blank" rel="noopener noreferrer">https://github.com/filebrowser/filebrowser<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><strong>第三个项目：go-admin</strong>，GitHub 上星标 5k+，基于 Go 语言的一个数据可视化与管理平台，使开发者能在极简短的时间里，用极简短的代码量搭建起一个后台管理。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/go-21.jpg" alt=""></p><blockquote><p>地址：<a href="https://github.com/GoAdminGroup/go-admin" target="_blank" rel="noopener noreferrer">https://github.com/GoAdminGroup/go-admin<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><strong>第四个项目：7天用Go从零实现分布式缓存GeeCache</strong>，每天完成的部分都是可以独立运行和测试的，就像搭积木一样，最终组合在一起就是一个完整的分布式缓存系统。每天的代码在 100 行左右。。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/go-22.jpg" alt=""></p><blockquote><p>地址：<a href="https://geektutu.com/post/geecache.html" target="_blank" rel="noopener noreferrer">https://geektutu.com/post/geecache.html<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>更多 Go语言的学习资料，可以直接戳我整理的这个 GitHub/码云仓库——📚程序员必读书单整理，附下载地址，里面有大量的 Go语言学习资料。</p><ul><li>GitHub 地址：<a href="https://github.com/itwanger/JavaBooks#go" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/JavaBooks<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li>码云地址：<a href="https://gitee.com/itwanger/JavaBooks#go" target="_blank" rel="noopener noreferrer">https://gitee.com/itwanger/JavaBooks<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul><h3 id="四、java-和-go-如何做取舍" tabindex="-1"><a class="header-anchor" href="#四、java-和-go-如何做取舍" aria-hidden="true">#</a> 四、Java 和 Go 如何做取舍？</h3><p>Go 语言设计的晚一点，所以可以站在巨人的肩膀上，不像 Java，历史包袱很沉重。比如 Go 在并发编程方面，就比 Java 更轻量级，性能也更强劲，因为 Java 诞生的时候还没有为高并发这样的场景做好准备。</p><p>Go 的使用简单，如果有其他编程语言的基础，也容易切换，阻力小。国内的大厂，比如说字节、腾讯这些都是要经常对抗高并发的场景，所以对 Go 的人才需求量比较大。</p><p>Go 这边没有 Java 那么卷，岗位的薪资却也比较客观。如果能趁早建立优势的话，以后发展的路子也就更宽广了一些。</p><p>但与此同时，由于 Go 的整个生态还没有 Java 那么完善，所以中小厂直接上 Go 的寥寥无几。<strong>稳妥起见，Java 为主，Go 为辅是比较合理的选择</strong>。</p><p>但一定要记住，无论什么时候，编程语言都不是最重要的，反而计算机基础是最重要的，尤其是操作系统、计网、计组、数据结构与算法这一块。</p><p>万丈高楼平地起，勿在浮沙筑高台。</p><p>基础扎实了，切换编程语言的时候只需要熟悉一下语法和库就 OK 了。</p><p>一名优秀的程序员，只会一种编程语言肯定是不够的，应该深入掌握一门，然后再涉足 1-2 门，这样的话，你能横向对比出来哪一种编程语言在哪一些领域有着比较大的优势，体会不同编程语言之间的差异性也会让你变得更加的优秀。</p><p>从个人职场发展来看，多一条腿走路，也更稳。。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/xuexiluxian/go.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg 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class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/go.html#一、go-的优势和劣势" class="router-link-active router-link-exact-active toc-link level3">一、Go 的优势和劣势</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/go.html#二、为什么会要求-java-转-go-呢" class="router-link-active router-link-exact-active toc-link level3">二、为什么会要求 Java 转 Go 呢？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/go.html#三、go-语言该怎么学习呢" class="router-link-active router-link-exact-active toc-link level3">三、Go 语言该怎么学习呢？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/go.html#四、java-和-go-如何做取舍" class="router-link-active router-link-exact-active toc-link level3">四、Java 和 Go 如何做取舍？</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="go学习路线-建议收藏" tabindex="-1"><a class="header-anchor" href="#go学习路线-建议收藏" aria-hidden="true">#</a> Go学习路线（建议收藏👍）</h1><p>大家好，我是二哥呀！最近又有一个读者来咨询我的建议：<strong>应届生，要求 Java 进去后转 Go，问我咋样？</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/go-1.png" alt=""></p><p>据我自己的印象，前前后后有十个读者来问过我这个问题了。一方面 Java 就业岗位确实多，薪资也给力；另外一方面，Go 确实很有潜力。</p><p>尤其是国内的字节跳动，Go 在常用的编程语言中占比是最高的，大部分产品的后端都在使用 Go。</p><p>那作为贴心的二哥，必须得给大家梳理一波思路了，希望能给需要的读者一点点帮助和启发~</p><h3 id="一、go-的优势和劣势" tabindex="-1"><a class="header-anchor" href="#一、go-的优势和劣势" aria-hidden="true">#</a> 一、Go 的优势和劣势</h3><p>Go 语言诞生于 2009 年，发展到现在，已经 12 岁了（应该没算错吧😭）。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/go-2.png" alt=""></p><p>很多明星级的开源产品，比如说 Kubernetes、Docker等，都是基于 Go 语言编写的。再加上近些年来微服务架构和云原生技术的普及，也大大的带火了 Go 这门编程语言，使其在 C/C++ 和 Java 中杀出了一条血路。</p><p>再加上从 2010 年 5 月起，Google 开始将 Go 语言投入到后端基础设施的实际开发中，很多我们能耳熟能详的应用都有使用 Go 语言，比如说谷歌地图、Google Cloud 等。</p><p>国内的字节跳动，就别提了。</p><p>Google 和字节两家大厂对 Go 的大力投入，在一定程度上又加速了 Go 这门编程语言的发展。</p><p>目前，使用 Go 语言的公司越来越多了，阿里、百度、腾讯、小米这些互联网大厂也在积极拥抱。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/go-3.png" alt=""></p><p>这使得 Go 工程师的薪资待遇也得到了很大程度上提高。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/go-4.png" alt=""></p><p>当然了，目前基本上除了大厂，很少有其他中小型公司用 Go，因为 Go 的生态还比不上 Java，没有 Java 那么丰富健全，中小公司的投入产出比比较低。大厂有人有钱，愿意在 Go 上投入成本。</p><p>另外，Go 也没有像外界吹捧的那么牛叉，就编程语言的排行榜上来看，Go 还是个滴滴（Python、C/C++、Java、C# 这些仍然是前排），有待发展。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/go-5.jpg" alt=""></p><h3 id="二、为什么会要求-java-转-go-呢" tabindex="-1"><a class="header-anchor" href="#二、为什么会要求-java-转-go-呢" aria-hidden="true">#</a> 二、为什么会要求 Java 转 Go 呢？</h3><p>最直接的原因就是 Go 这边比较缺人，而 Java 这边基本上是招聘的多，竞聘的更多。</p><p>熟练掌握 Java 的一般都比较能打，转 Go 后作战能力肯定也是不容小觑。</p><p>对于我们国内的开发环境来说，Java 的确是顶流，我个人也是 Java 的重度使用者，但<strong>我私底下也在学习其他的编程语言，因为只有这样，才能最大程度上保持自己的竞争力</strong>。</p><p>每种编程语言只要能发挥出它最大的优势，就是值得我们去学习和使用的。</p><p>再者，编程语言这东西，你掌握了一个，再学另外一个也会很快的。</p><p>截止到目前，我学过 Python、C/C++、Go、JavaScript 等等，因为有 Java 语言的底子在，学这些编程语言的时候，阻力基本上就像在泳池里游泳一样，一开始会感觉有点困难，等熟练了之后，会感觉很舒服。</p><h3 id="三、go-语言该怎么学习呢" tabindex="-1"><a class="header-anchor" href="#三、go-语言该怎么学习呢" aria-hidden="true">#</a> 三、Go 语言该怎么学习呢？</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/go-6.png" alt=""></p><p>不管怎么说，Go 语言的确是值得去学习的。如果公司确实需要转 Go 岗，也完全没有必要抗拒。</p><p>这里给大家推荐一个 Go 语言的学习路线图，如果你想要成为一名Go语言的开发者的话，可以沿着这张图里面的路径去学习。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/go-7.jpg" alt=""></p><p>接下来给大家推荐一些 Go 语言的学习资料，全部免费开源，是我肝了两个大夜精挑细选出来的。</p><p>记住一点：<strong>不管是学习哪一门编程语言，顺序基本上就是视频入门+教程/书籍巩固+项目练习</strong>。</p><p><strong>1）视频课</strong></p><p><strong>第一套视频：《Go 编程基础》</strong>，主要面向 Go 语言新手级别的学习者。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/go-8.jpg" alt=""></p><blockquote><p>课程地址：<a href="https://github.com/unknwon/go-fundamental-programming" target="_blank" rel="noopener noreferrer">https://github.com/unknwon/go-fundamental-programming<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><strong>第二套视频：尚硅谷 Go 入门到实战教程</strong>，采用真实案例，从理论到实践，一步一步将 Go 的核心编程技术、编程思想、底层实现融会贯通。</p><p>虽然尚硅谷是一家培训机构，但在 B 站上公开的一些课程还真的是挺香的，学 Java 的同学可能很大一部分都看过宋红康老师的课，YYDS！</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/go-9.jpg" alt=""></p><blockquote><p>视频地址：<a href="https://www.bilibili.com/video/BV1ME411Y71o" target="_blank" rel="noopener noreferrer">https://www.bilibili.com/video/BV1ME411Y71o<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><strong>2）教程/书籍</strong></p><p><strong>第一套教程：Go 语言之旅</strong>，这是一个对初学者极其友好的在线网站，并且每一步都可以直接运行代码并看到效果。初学阶段，最重要的就是能通过手敲代码感受到学习的成果。</p><p>点击右侧的菜单可以快速浏览教程的所有内容，非常方便。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/go-10.jpg" alt=""></p><blockquote><p>教程地址：<a href="http://tour.studygolang.com/welcome/1" target="_blank" rel="noopener noreferrer">http://tour.studygolang.com/welcome/1<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><strong>第二套教程：LeetCode-Go</strong>，一本 LeetCode 的刷题笔记，代码是用 Go 语言实现的，收录了超过 500 道题的题解思路和代码，代码方案都是效率超高的“标准答案”：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/go-11.jpg" alt=""></p><blockquote><p>教程地址：<a href="https://books.halfrost.com/leetcode/" target="_blank" rel="noopener noreferrer">https://books.halfrost.com/leetcode/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><strong>第三套教程：《Go 语言设计与实现》</strong>，这份教程的内容可以分成四个部分：</p><ul><li>编译原理</li><li>运行时</li><li>基础知识</li><li>进阶知识</li></ul><p>几乎覆盖了 Go 语言从编译到运行的方方面面，读完后能对 Go 语言有更加整体和深刻的认识。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/go-12.jpg" alt=""></p><blockquote><p>在线地址：<a href="https://draveness.me/golang/" target="_blank" rel="noopener noreferrer">https://draveness.me/golang/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>是开发者内功修炼号主飞哥给我推荐的，当时看完后就大为震撼。目前我看作者已经出版了纸质书。</p><p><strong>第四套教程：《玩转 GO》</strong>，内容包括但不限于并发、网络编程、垃圾回收、组合、Go UNIX系统编程、基本数据类型（Array,Slice,Map）、Go源码、反射，接口，类型方法等高级概念。</p><p>不过遗憾的是，在线阅读地址挂了，我还提交了一个 issue：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/go-13.jpg" alt=""></p><p>不过幸好我备份了一份离线版 PDF，里面的内容还是非常完整的：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/go-14.jpg" alt=""></p><p>需要的小伙伴请长按识别/扫描下方的二维码关注作者的原创公众号「<strong>沉默王二</strong>」回复关键字「<strong>go</strong>」就可以拉取到了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongzhonghao.png" alt="扫码关注后回复「go」关键字"></p><p><strong>第五套教程：Go标准库文档</strong>，可以查询每个API的具体使用方式，这也是 Go 开发者的必备手册。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/go-15.jpg" alt=""></p><blockquote><p>在线地址：<a href="https://studygolang.com/static/pkgdoc/main.html" target="_blank" rel="noopener noreferrer">https://studygolang.com/static/pkgdoc/main.html<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>再推荐一些比较优质的纸质书籍吧。</p><p><strong>第一本：Go语言实战</strong>，这本书关注于 Go 语言的规范和实现，涉及的内容包括语法、Go 的类型系统、并发、通道和测试等主题。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/go-16.jpg" alt=""></p><p><strong>第二本：《Go 语言学习笔记》</strong>，上卷专注于语言规范相关细节，下卷专注于对运行时源码做出深度剖析，诸如内存分配、垃圾回收和并发调度等。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/go-17.jpg" alt=""></p><p><strong>第三本：《Go Web 编程》</strong>，这本书以一个网络论坛作为例子，讲解了如何使用请求处理器、多路复用器、模板引擎、存储系统等核心组件去构建一个 Go 的 Web 应用。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/go-18.jpg" alt=""></p><p>下面是我根据一位拿到大厂 offer 的师弟菜饼提供的学习资料整理出来的书单，相信对你学习 go 语言会很有帮助的。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/go-4b3b67f3-ebe0-4311-8c7c-7e87f89ccdc7.jpg" alt=""></p><p>需要的小伙伴请长按识别/扫描下方的二维码关注作者的原创公众号「<strong>沉默王二</strong>」回复关键字「<strong>go</strong>」就可以拉取到了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongzhonghao.png" alt="扫码关注后回复「go」关键字"></p><p><strong>3）实战项目</strong></p><p><strong>第一个项目：seaweedfs</strong>，GitHub 上星标 13k+，这是一个分布式文件系统，基于 Go 开发，部署方便，使用简单，功能强大。</p><blockquote><p>地址：<a href="https://github.com/chrislusf/seaweedfs" target="_blank" rel="noopener noreferrer">https://github.com/chrislusf/seaweedfs<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><strong>第二个项目：seaweedfs</strong>，GitHub 上星标 13k+，这是一个自带文件浏览器的网盘服务，支持文件浏览、生成分享链接、批量上传、创建文件夹等功能、用户系统。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/go-20.jpg" alt=""></p><blockquote><p>地址：<a href="https://github.com/filebrowser/filebrowser" target="_blank" rel="noopener noreferrer">https://github.com/filebrowser/filebrowser<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><strong>第三个项目：go-admin</strong>，GitHub 上星标 5k+，基于 Go 语言的一个数据可视化与管理平台，使开发者能在极简短的时间里，用极简短的代码量搭建起一个后台管理。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/go-21.jpg" alt=""></p><blockquote><p>地址：<a href="https://github.com/GoAdminGroup/go-admin" target="_blank" rel="noopener noreferrer">https://github.com/GoAdminGroup/go-admin<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><strong>第四个项目：7天用Go从零实现分布式缓存GeeCache</strong>，每天完成的部分都是可以独立运行和测试的，就像搭积木一样，最终组合在一起就是一个完整的分布式缓存系统。每天的代码在 100 行左右。。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/go-22.jpg" alt=""></p><blockquote><p>地址：<a href="https://geektutu.com/post/geecache.html" target="_blank" rel="noopener noreferrer">https://geektutu.com/post/geecache.html<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>更多 Go语言的学习资料，可以直接戳我整理的这个 GitHub/码云仓库——📚程序员必读书单整理，附下载地址，里面有大量的 Go语言学习资料。</p><ul><li>GitHub 地址：<a href="https://github.com/itwanger/JavaBooks#go" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/JavaBooks<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li>码云地址：<a href="https://gitee.com/itwanger/JavaBooks#go" target="_blank" rel="noopener noreferrer">https://gitee.com/itwanger/JavaBooks<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul><h3 id="四、java-和-go-如何做取舍" tabindex="-1"><a class="header-anchor" href="#四、java-和-go-如何做取舍" aria-hidden="true">#</a> 四、Java 和 Go 如何做取舍？</h3><p>Go 语言设计的晚一点，所以可以站在巨人的肩膀上，不像 Java，历史包袱很沉重。比如 Go 在并发编程方面，就比 Java 更轻量级，性能也更强劲，因为 Java 诞生的时候还没有为高并发这样的场景做好准备。</p><p>Go 的使用简单，如果有其他编程语言的基础，也容易切换，阻力小。国内的大厂，比如说字节、腾讯这些都是要经常对抗高并发的场景，所以对 Go 的人才需求量比较大。</p><p>Go 这边没有 Java 那么卷，岗位的薪资却也比较客观。如果能趁早建立优势的话，以后发展的路子也就更宽广了一些。</p><p>但与此同时，由于 Go 的整个生态还没有 Java 那么完善，所以中小厂直接上 Go 的寥寥无几。<strong>稳妥起见，Java 为主，Go 为辅是比较合理的选择</strong>。</p><p>但一定要记住，无论什么时候，编程语言都不是最重要的，反而计算机基础是最重要的，尤其是操作系统、计网、计组、数据结构与算法这一块。</p><p>万丈高楼平地起，勿在浮沙筑高台。</p><p>基础扎实了，切换编程语言的时候只需要熟悉一下语法和库就 OK 了。</p><p>一名优秀的程序员，只会一种编程语言肯定是不够的，应该深入掌握一门，然后再涉足 1-2 门，这样的话，你能横向对比出来哪一种编程语言在哪一些领域有着比较大的优势，体会不同编程语言之间的差异性也会让你变得更加的优秀。</p><p>从个人职场发展来看，多一条腿走路，也更稳。。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/xuexiluxian/go.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg 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data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 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145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 10 分钟</span><meta property="timeRequired" content="PT10M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/java/jvm.html#一、为什么要学习-jvm" class="router-link-active router-link-exact-active toc-link level3">一、为什么要学习 JVM？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/java/jvm.html#二、jvm-学习路线图" class="router-link-active router-link-exact-active toc-link level3">二、JVM 学习路线图</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/java/jvm.html#三、硬核-jvm-学习资料" class="router-link-active router-link-exact-active toc-link level3">三、硬核 JVM 学习资料</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/java/jvm.html#四、jvm-八股文" class="router-link-active router-link-exact-active toc-link level3">四、JVM 八股文</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/java/jvm.html#五、学习-jvm-的一点小心得" class="router-link-active router-link-exact-active toc-link level3">五、学习 JVM 的一点小心得</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="java虚拟机学习路线-建议收藏" tabindex="-1"><a class="header-anchor" href="#java虚拟机学习路线-建议收藏" aria-hidden="true">#</a> Java虚拟机学习路线（建议收藏👍）</h1><p>2020 年的时候，通读了一遍周志明老师的《深入理解 Java 虚拟机：JVM 高级特性与最佳实践》第三版，读完之后受益匪浅，这让我对 Java 虚拟机有了一个更完整的认识。毫无疑问，《深入理解 Java 虚拟机》是 JVM 书籍中最好的一本书了，国产技术书的天花板。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/jvm-7036a048-4034-4965-92a6-e35d0211ba71.png" alt=""></p><p>在金三银四/金九银十的跳槽季中，很多小伙伴都会忍不住蠢蠢欲动，其中 JVM 更是面试中不可或缺的一部分，所以我花了几天的时间整理了一条 JVM 的学习路线，希望能帮助到大家。</p><h3 id="一、为什么要学习-jvm" tabindex="-1"><a class="header-anchor" href="#一、为什么要学习-jvm" aria-hidden="true">#</a> 一、为什么要学习 JVM？</h3><p>曾经我对 JVM 也是感到非常的头痛，完全搞不懂该怎么入门，只是听说《深入理解 Java 虚拟机》这本书很吊，但真读起来，却需要极大的耐心和定力，否则很快就会在读完第一章 JVM 的简史后放弃。</p><p>那首先，我们就要搞清楚，为什么要学习 JVM ？</p><p>第一，当然是面试要考，这一点毫无疑问，尤其是对于要参加校招的应届生来说，JVM 是绕不过去的，必须得学。</p><p>第二，如果你想成为公司不可或缺的顶梁柱，那 JVM 你得学，因为一般情况下，遇到的问题基本上 Google 下就能解决了，可一旦遇到 JVM 性能调优，就必须得有能查 OOM 的原因、能看懂字节码的老鸟出马了。</p><p>应用程序一旦上线，出问题是板上钉钉的事，除了数据库、网络、代码逻辑上的问题，剩下的就有内存溢出啊，频繁 GC 导致的性能瓶颈啊等棘手问题。</p><p>遇到这种问题，你就必须得能看懂 GC 日志，明白什么是老年代、永久代、元数据区等，这些都是 Java 虚拟机方面的知识。</p><p>明白了学习 JVM 的重要性，那我们就开搞吧！</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/jvm-4cbbdc72-3bdd-4b14-9d8d-ecd7764afb11.png" alt=""></p><h3 id="二、jvm-学习路线图" tabindex="-1"><a class="header-anchor" href="#二、jvm-学习路线图" aria-hidden="true">#</a> 二、JVM 学习路线图</h3><p>这是我最近整理的一张关于 JVM 的思维导图，大的方向可以分为三个部分：字节码与类的加载、内存与垃圾回收、性能监控和调优。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/jvm-b4ec034b-9f20-40b9-a2a3-e77afffd2abf.png" alt=""></p><p>字节码与类的加载包括：</p><ul><li>类的加载机制（类的加载过程、类加载器、双亲委派模型）</li><li>字节码（类文件结构、字节码指令、字节码执行引擎、实战字节码）</li></ul><p>内存与垃圾回收包括：</p><ul><li>JVM 内存结构</li><li>垃圾回收算法</li><li>垃圾回收机制</li><li>垃圾收集器</li></ul><p>性能监控和调优包括：</p><ul><li>调优指标</li><li>调优对象</li><li>调优工具</li><li>JIT 优化</li></ul><p>有理论知识，有动手实战，基本上可以把 JVM 这块学的非常扎实了。</p><h3 id="三、硬核-jvm-学习资料" tabindex="-1"><a class="header-anchor" href="#三、硬核-jvm-学习资料" aria-hidden="true">#</a> 三、硬核 JVM 学习资料</h3><p><strong>1）Java 程序员进阶之路</strong></p><p>学 Java，怎么能少得了二哥的小破站《Java 程序员进阶之路》，网址我贴下面了哈：</p><blockquote><p><a href="https://tobebetterjavaer.com/home.html#java%E8%99%9A%E6%8B%9F%E6%9C%BA" target="_blank" rel="noopener noreferrer">https://tobebetterjavaer.com/home.html#java虚拟机<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>进去直接找「Java 核心」里面的 Java 虚拟机就对了。我按照前面的思维导图整理了 19 篇文章，全部都是硬核级别的，跟着学就对了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/jvm-cc84fead-278b-46aa-a8ab-a3b07acefc12.png" alt=""></p><p><strong>2）视频</strong></p><p>懂的都懂，看视频到 B 站。先推荐宋红康老师的 JVM 全套教程，200多万的播放量，还是非常受欢迎的。全套课程分为：</p><ul><li>内存与垃圾回收篇</li><li>字节码与类的加载篇</li><li>性能监控和调优篇</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/jvm-59c829ce-7fe3-45a5-b074-35dacb08941e.png" alt=""></p><blockquote><p>视频地址：<a href="https://www.bilibili.com/video/BV1PJ411n7xZ" target="_blank" rel="noopener noreferrer">https://www.bilibili.com/video/BV1PJ411n7xZ<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>友情提示，对于找工作面试的小伙伴，看 p01-p203、p266-301 就够了！</p><p>再推荐一个狂神说的，40多万的播放量，算是一个面向 JVM 面试的突击版。像一些常见的 JVM 面试题，视频里都有讲到，比如说：</p><ul><li>什么是 JVM？</li><li>说一说类加载器？</li><li>栈和堆的区别是什么？</li><li>JDK 8 和之前发生了什么变化？</li><li>新生代和老年代是干嘛的？</li><li>From区和 To区什么区别？</li><li>如何排查 OOM？</li><li>说说垃圾回收算法</li><li>说说 JVM 内存结构</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/jvm-be0910d8-7669-46cb-b8b9-2399162e723d.png" alt=""></p><blockquote><p>视频地址：<a href="https://www.bilibili.com/video/BV1iJ411d7jS" target="_blank" rel="noopener noreferrer">https://www.bilibili.com/video/BV1iJ411d7jS<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><strong>3）书籍</strong></p><p>纸质书只推荐一本周志明老师的神书《<a href="https://book.douban.com/subject/34907497/" target="_blank" rel="noopener noreferrer">深入理解 Java 虚拟机<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>》，基本上学习 JVM 的小伙伴人手一本。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/jvm-3f6065c5-2fbf-4107-804e-393b32a4f9ab.png" alt=""></p><p>这是一部从工作原理和工程实践两个维度深入剖析JVM的著作，是计算机领域公认的经典。</p><p>全书分为五个部分，第一部分为走近 Java，主要是对 JVM 的发展历史进行了介绍，其中第二部分自动内存管理和第三部分虚拟机执行子系统需要重点掌握，这两部分的内容也是最多的。</p><p>第四部分程序编译与代码优化中需要重点掌握的是 JIT 部分，第五部分高效并发最好和<a href="https://t.zsxq.com/iYRNrJu" target="_blank" rel="noopener noreferrer">Java 并发编程<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>（我前面也做了学习路线的总结）这块内容结合起来学习。</p><p>可以配合 GitHub 上这个开源的阅读笔记学习：</p><blockquote><p><a href="https://github.com/TangBean/understanding-the-jvm" target="_blank" rel="noopener noreferrer">https://github.com/TangBean/understanding-the-jvm<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><strong>4）开源电子书</strong></p><p>推荐 doocs 社区的 <a href="https://doocs.github.io/jvm/" target="_blank" rel="noopener noreferrer">JVM 底层原理最全知识总结<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，算是《深入理解 Java 虚拟机》这本书的一个精简知识点梳理。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/jvm-f2e2e5c4-c193-4af5-b1bc-fea8df2006af.png" alt=""></p><blockquote><p>GitHub 地址：<a href="https://github.com/doocs/jvm" target="_blank" rel="noopener noreferrer">https://github.com/doocs/jvm<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>考虑到有些小伙伴可能需要 PDF 版本，我都整理好了，需要的小伙伴请扫描下方的二维码关注作者的原创公众号「<strong>沉默王二</strong>」回复关键字「<strong>java</strong>」就可以拉取到了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongzhonghao.png" alt="扫码关注后回复「java」关键字"></p><p>再推荐一份 GitHub 上开源的 Java 虚拟机知识点总结：</p><blockquote><p><a href="https://github.com/heibaiying/Full-Stack-Notes/blob/master/notes/Java_%E8%99%9A%E6%8B%9F%E6%9C%BA.md" target="_blank" rel="noopener noreferrer">https://github.com/heibaiying/Full-Stack-Notes/blob/master/notes/Java_虚拟机.md<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>为了方便大家的学习，我也将其整理成了 PDF，内容包含了 Java 内存区域、垃圾收集算法、经典垃圾收集器、虚拟机类加载机制、程序编译和代码优化，手绘图也非常的漂亮。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/jvm-2beabbe4-2ddd-4180-8690-1bc3224e6b41.png" alt=""></p><p>需要的小伙伴可以微信搜索「<strong>沉默王二</strong>」回复关键字「<strong>java</strong>」就可以拉取到了。</p><p><strong>5）付费专栏</strong></p><p>郑雨迪老师在极客时间上开了一门《深入拆解Java虚拟机》的付费专栏，质量还是挺高的，喜欢的小伙伴可以戳<a href="http://gk.link/a/11htX" target="_blank" rel="noopener noreferrer">链接<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>去购买，反正我自己感觉质量还不错。</p><h3 id="四、jvm-八股文" tabindex="-1"><a class="header-anchor" href="#四、jvm-八股文" aria-hidden="true">#</a> 四、JVM 八股文</h3><p>这里给大家推荐两份 Java 虚拟机方面的八股文，一份来自读者<a href="https://mp.weixin.qq.com/s/1jhBZrAb7bnvkgN1TgAUpw" target="_blank" rel="noopener noreferrer">三分恶<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，一份来自读者小牛，先截图给大家看一下 Java 虚拟机的理解版八股文，图文并茂，非常容易消化和吸收。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/jvm-a11893df-e518-4bdc-a166-884b168a8cf0.png" alt=""></p><p>为了方便大家的阅读和背诵，我已经将其整理到了二哥的小破站《Java 程序员进阶之路》上，面渣逆袭 Java 虚拟机篇：</p><blockquote><p><a href="https://tobebetterjavaer.com/sidebar/sanfene/jvm.html" target="_blank" rel="noopener noreferrer">https://tobebetterjavaer.com/sidebar/sanfene/jvm.html<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>Java 虚拟机八股文（背诵版）：</p><blockquote><p><a href="https://tobebetterjavaer.com/baguwen/jvm.html" target="_blank" rel="noopener noreferrer">https://tobebetterjavaer.com/baguwen/jvm.html<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>诚实点说，如果能把这两份八股文背会/理解的话，简历上就真的敢写“精通”Java 虚拟机了。</p><h3 id="五、学习-jvm-的一点小心得" tabindex="-1"><a class="header-anchor" href="#五、学习-jvm-的一点小心得" aria-hidden="true">#</a> 五、学习 JVM 的一点小心得</h3><p>和 C++ 相比，Java 的内存管理机制可以说是一大特色，Java 开发不再需要自己去写代码手动释放内存，甚至你想自己干，JVM 都不给你这个机会，虚拟机完全掌握了 Java 内存的控制权。</p><p>这看起来挺美好的，但并不意味着Java 开发就可以随意写代码，随意使用内存，从我多年的使用体验来看，内存溢出和内存泄露还是会时不时发生的，尤其是初学阶段，尤其在开启多线程的情况下。</p><p>一旦出现内存溢出或者内存泄露，排查问题还是挺困难的，所以知道逊尼基到底是怎么管理内存的就变得十分重要了。</p><p><a href="https://tobebetterjavaer.com/jvm/gc.html" target="_blank" rel="noopener noreferrer">JVM 的垃圾回收<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，其实就是收拾那些不再使用的 Java 对象，把他们曾经占用的内存重新释放出来。所以我们要搞清楚：</p><ul><li><a href="https://tobebetterjavaer.com/jvm/whereis-the-object.html" target="_blank" rel="noopener noreferrer">对象是如何创建的<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>？对象是如何被访问的？到底哪些对象是废弃的？于是我们就需要搞清楚对象的生和死。</li><li>这些废弃了的对象到底放在哪？于是就需要了解<a href="https://tobebetterjavaer.com/jvm/neicun-jiegou.html" target="_blank" rel="noopener noreferrer">JVM 的内存结构<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>：方法区、堆、程序计数器、虚拟机栈和本地方法栈。</li><li>这些废弃了的对象会不会造成内存泄露（OOM，OutOfMemoryError）？于是我们就需要了解每个分区的 OOM。</li><li>这些废弃了对象什么时候被回收？于是我们就需要了解垃圾回收算法，比如说清除算法、复制算法、标记整理算法和分代收集算法。</li></ul><p>知道了一个对象在内存中的生和死，我们还需要知道类是如何在内存中变成对象的？对象的方法是如何执行的？</p><p>于是我们开始学习 Java 虚拟机的执行过程，学习<a href="https://tobebetterjavaer.com/jvm/class-file-jiegou.html" target="_blank" rel="noopener noreferrer">字节码文件<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>（ .class 文件），学习<a href="https://tobebetterjavaer.com/jvm/class-load.html" target="_blank" rel="noopener noreferrer">类的加载机制<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，学习<a href="https://tobebetterjavaer.com/jvm/how-jvm-run-zijiema-zhiling.html" target="_blank" rel="noopener noreferrer">虚拟机栈的栈帧结构<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，学习方法的调用过程，学习<a href="https://tobebetterjavaer.com/jvm/zijiema-zhiling.html" target="_blank" rel="noopener noreferrer">字节码指令<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>等等。</p><p>为了监控虚拟机和故障排查，我们需要学习<a href="https://tobebetterjavaer.com/jvm/problem-tools.html" target="_blank" rel="noopener noreferrer">常用的 JDK 命令行工具<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，掌握必要的线上问题排查方法；此外，还需要了解 JIT (Just In Time)并不是简单的将热点代码编译成机器码就收工的，它还会对代码的执行进行优化（<a href="https://tobebetterjavaer.com/jvm/jit.html" target="_blank" rel="noopener noreferrer">方法内联和逃逸分析<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>）。</p><p>JVM 相关的知识已经成为面试必考的科目了，但老实讲，JVM 相关的知识还真的不太好用在项目中，或者说不太好在项目中体现出来。</p><p>那这里给大家推荐一个实战项目，基于 Spring Boot 的在线 Java IDE，可以远程执行 Java 代码并将程序的运行结果反馈出来。涉及了 Java 类文件的结构、Java 类加载器和 Java 类的热替换等 JVM 相关的技术。</p><blockquote><p><a href="https://github.com/TangBean/OnlineExecutor" target="_blank" rel="noopener noreferrer">https://github.com/TangBean/OnlineExecutor<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>听我这么一说，是不是一下子就清晰多了！</p><p>另外，需要 Java 学习资料的话，可以直接戳我整理的这个 GitHub/码云仓库——📚Java程序员必读书单整理，附下载地址，助力每一个Java程序员构建属于自己的知识体系。包括但不限于Java、设计模式、计算机网络、操作系统、数据库、数据结构与算法、大数据、架构、面试等等。</p><ul><li>GitHub 地址：<a href="https://github.com/itwanger/JavaBooks" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/JavaBooks<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li>码云地址：<a href="https://gitee.com/itwanger/JavaBooks" target="_blank" rel="noopener noreferrer">https://gitee.com/itwanger/JavaBooks<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul><p>给大家截图展示一下里面都有哪些优质的 PDF：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/java-books.jpg" alt=""></p><p><strong>Java 虚拟机虽然难学，但如果你能坚持学下去，内功自然而然就提升了一大截</strong>。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/xuexiluxian/java/jvm.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" 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249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月29日</span><meta property="datePublished" content="2022-03-29T01:56:53.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>学习路线</li><meta property="articleSection" content="学习路线"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li><li class="tag tag1" role>JVM</li></ul><meta property="keywords" content="Java,JVM"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 10 分钟</span><meta property="timeRequired" content="PT10M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/java/jvm.html#一、为什么要学习-jvm" class="router-link-active router-link-exact-active toc-link level3">一、为什么要学习 JVM？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/java/jvm.html#二、jvm-学习路线图" class="router-link-active router-link-exact-active toc-link level3">二、JVM 学习路线图</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/java/jvm.html#三、硬核-jvm-学习资料" class="router-link-active router-link-exact-active toc-link level3">三、硬核 JVM 学习资料</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/java/jvm.html#四、jvm-八股文" class="router-link-active router-link-exact-active toc-link level3">四、JVM 八股文</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/java/jvm.html#五、学习-jvm-的一点小心得" class="router-link-active router-link-exact-active toc-link level3">五、学习 JVM 的一点小心得</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="java虚拟机学习路线-建议收藏" tabindex="-1"><a class="header-anchor" href="#java虚拟机学习路线-建议收藏" aria-hidden="true">#</a> Java虚拟机学习路线（建议收藏👍）</h1><p>2020 年的时候，通读了一遍周志明老师的《深入理解 Java 虚拟机：JVM 高级特性与最佳实践》第三版，读完之后受益匪浅，这让我对 Java 虚拟机有了一个更完整的认识。毫无疑问，《深入理解 Java 虚拟机》是 JVM 书籍中最好的一本书了，国产技术书的天花板。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/jvm-7036a048-4034-4965-92a6-e35d0211ba71.png" alt=""></p><p>在金三银四/金九银十的跳槽季中，很多小伙伴都会忍不住蠢蠢欲动，其中 JVM 更是面试中不可或缺的一部分，所以我花了几天的时间整理了一条 JVM 的学习路线，希望能帮助到大家。</p><h3 id="一、为什么要学习-jvm" tabindex="-1"><a class="header-anchor" href="#一、为什么要学习-jvm" aria-hidden="true">#</a> 一、为什么要学习 JVM？</h3><p>曾经我对 JVM 也是感到非常的头痛，完全搞不懂该怎么入门，只是听说《深入理解 Java 虚拟机》这本书很吊，但真读起来，却需要极大的耐心和定力，否则很快就会在读完第一章 JVM 的简史后放弃。</p><p>那首先，我们就要搞清楚，为什么要学习 JVM ？</p><p>第一，当然是面试要考，这一点毫无疑问，尤其是对于要参加校招的应届生来说，JVM 是绕不过去的，必须得学。</p><p>第二，如果你想成为公司不可或缺的顶梁柱，那 JVM 你得学，因为一般情况下，遇到的问题基本上 Google 下就能解决了，可一旦遇到 JVM 性能调优，就必须得有能查 OOM 的原因、能看懂字节码的老鸟出马了。</p><p>应用程序一旦上线，出问题是板上钉钉的事，除了数据库、网络、代码逻辑上的问题，剩下的就有内存溢出啊，频繁 GC 导致的性能瓶颈啊等棘手问题。</p><p>遇到这种问题，你就必须得能看懂 GC 日志，明白什么是老年代、永久代、元数据区等，这些都是 Java 虚拟机方面的知识。</p><p>明白了学习 JVM 的重要性，那我们就开搞吧！</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/jvm-4cbbdc72-3bdd-4b14-9d8d-ecd7764afb11.png" alt=""></p><h3 id="二、jvm-学习路线图" tabindex="-1"><a class="header-anchor" href="#二、jvm-学习路线图" aria-hidden="true">#</a> 二、JVM 学习路线图</h3><p>这是我最近整理的一张关于 JVM 的思维导图，大的方向可以分为三个部分：字节码与类的加载、内存与垃圾回收、性能监控和调优。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/jvm-b4ec034b-9f20-40b9-a2a3-e77afffd2abf.png" alt=""></p><p>字节码与类的加载包括：</p><ul><li>类的加载机制（类的加载过程、类加载器、双亲委派模型）</li><li>字节码（类文件结构、字节码指令、字节码执行引擎、实战字节码）</li></ul><p>内存与垃圾回收包括：</p><ul><li>JVM 内存结构</li><li>垃圾回收算法</li><li>垃圾回收机制</li><li>垃圾收集器</li></ul><p>性能监控和调优包括：</p><ul><li>调优指标</li><li>调优对象</li><li>调优工具</li><li>JIT 优化</li></ul><p>有理论知识，有动手实战，基本上可以把 JVM 这块学的非常扎实了。</p><h3 id="三、硬核-jvm-学习资料" tabindex="-1"><a class="header-anchor" href="#三、硬核-jvm-学习资料" aria-hidden="true">#</a> 三、硬核 JVM 学习资料</h3><p><strong>1）Java 程序员进阶之路</strong></p><p>学 Java，怎么能少得了二哥的小破站《Java 程序员进阶之路》，网址我贴下面了哈：</p><blockquote><p><a href="https://tobebetterjavaer.com/home.html#java%E8%99%9A%E6%8B%9F%E6%9C%BA" target="_blank" rel="noopener noreferrer">https://tobebetterjavaer.com/home.html#java虚拟机<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>进去直接找「Java 核心」里面的 Java 虚拟机就对了。我按照前面的思维导图整理了 19 篇文章，全部都是硬核级别的，跟着学就对了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/jvm-cc84fead-278b-46aa-a8ab-a3b07acefc12.png" alt=""></p><p><strong>2）视频</strong></p><p>懂的都懂，看视频到 B 站。先推荐宋红康老师的 JVM 全套教程，200多万的播放量，还是非常受欢迎的。全套课程分为：</p><ul><li>内存与垃圾回收篇</li><li>字节码与类的加载篇</li><li>性能监控和调优篇</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/jvm-59c829ce-7fe3-45a5-b074-35dacb08941e.png" alt=""></p><blockquote><p>视频地址：<a href="https://www.bilibili.com/video/BV1PJ411n7xZ" target="_blank" rel="noopener noreferrer">https://www.bilibili.com/video/BV1PJ411n7xZ<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>友情提示，对于找工作面试的小伙伴，看 p01-p203、p266-301 就够了！</p><p>再推荐一个狂神说的，40多万的播放量，算是一个面向 JVM 面试的突击版。像一些常见的 JVM 面试题，视频里都有讲到，比如说：</p><ul><li>什么是 JVM？</li><li>说一说类加载器？</li><li>栈和堆的区别是什么？</li><li>JDK 8 和之前发生了什么变化？</li><li>新生代和老年代是干嘛的？</li><li>From区和 To区什么区别？</li><li>如何排查 OOM？</li><li>说说垃圾回收算法</li><li>说说 JVM 内存结构</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/jvm-be0910d8-7669-46cb-b8b9-2399162e723d.png" alt=""></p><blockquote><p>视频地址：<a href="https://www.bilibili.com/video/BV1iJ411d7jS" target="_blank" rel="noopener noreferrer">https://www.bilibili.com/video/BV1iJ411d7jS<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><strong>3）书籍</strong></p><p>纸质书只推荐一本周志明老师的神书《<a href="https://book.douban.com/subject/34907497/" target="_blank" rel="noopener noreferrer">深入理解 Java 虚拟机<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>》，基本上学习 JVM 的小伙伴人手一本。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/jvm-3f6065c5-2fbf-4107-804e-393b32a4f9ab.png" alt=""></p><p>这是一部从工作原理和工程实践两个维度深入剖析JVM的著作，是计算机领域公认的经典。</p><p>全书分为五个部分，第一部分为走近 Java，主要是对 JVM 的发展历史进行了介绍，其中第二部分自动内存管理和第三部分虚拟机执行子系统需要重点掌握，这两部分的内容也是最多的。</p><p>第四部分程序编译与代码优化中需要重点掌握的是 JIT 部分，第五部分高效并发最好和<a href="https://t.zsxq.com/iYRNrJu" target="_blank" rel="noopener noreferrer">Java 并发编程<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>（我前面也做了学习路线的总结）这块内容结合起来学习。</p><p>可以配合 GitHub 上这个开源的阅读笔记学习：</p><blockquote><p><a href="https://github.com/TangBean/understanding-the-jvm" target="_blank" rel="noopener noreferrer">https://github.com/TangBean/understanding-the-jvm<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><strong>4）开源电子书</strong></p><p>推荐 doocs 社区的 <a href="https://doocs.github.io/jvm/" target="_blank" rel="noopener noreferrer">JVM 底层原理最全知识总结<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，算是《深入理解 Java 虚拟机》这本书的一个精简知识点梳理。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/jvm-f2e2e5c4-c193-4af5-b1bc-fea8df2006af.png" alt=""></p><blockquote><p>GitHub 地址：<a href="https://github.com/doocs/jvm" target="_blank" rel="noopener noreferrer">https://github.com/doocs/jvm<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>考虑到有些小伙伴可能需要 PDF 版本，我都整理好了，需要的小伙伴请扫描下方的二维码关注作者的原创公众号「<strong>沉默王二</strong>」回复关键字「<strong>java</strong>」就可以拉取到了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongzhonghao.png" alt="扫码关注后回复「java」关键字"></p><p>再推荐一份 GitHub 上开源的 Java 虚拟机知识点总结：</p><blockquote><p><a href="https://github.com/heibaiying/Full-Stack-Notes/blob/master/notes/Java_%E8%99%9A%E6%8B%9F%E6%9C%BA.md" target="_blank" rel="noopener noreferrer">https://github.com/heibaiying/Full-Stack-Notes/blob/master/notes/Java_虚拟机.md<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>为了方便大家的学习，我也将其整理成了 PDF，内容包含了 Java 内存区域、垃圾收集算法、经典垃圾收集器、虚拟机类加载机制、程序编译和代码优化，手绘图也非常的漂亮。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/jvm-2beabbe4-2ddd-4180-8690-1bc3224e6b41.png" alt=""></p><p>需要的小伙伴可以微信搜索「<strong>沉默王二</strong>」回复关键字「<strong>java</strong>」就可以拉取到了。</p><p><strong>5）付费专栏</strong></p><p>郑雨迪老师在极客时间上开了一门《深入拆解Java虚拟机》的付费专栏，质量还是挺高的，喜欢的小伙伴可以戳<a href="http://gk.link/a/11htX" target="_blank" rel="noopener noreferrer">链接<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>去购买，反正我自己感觉质量还不错。</p><h3 id="四、jvm-八股文" tabindex="-1"><a class="header-anchor" href="#四、jvm-八股文" aria-hidden="true">#</a> 四、JVM 八股文</h3><p>这里给大家推荐两份 Java 虚拟机方面的八股文，一份来自读者<a href="https://mp.weixin.qq.com/s/1jhBZrAb7bnvkgN1TgAUpw" target="_blank" rel="noopener noreferrer">三分恶<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，一份来自读者小牛，先截图给大家看一下 Java 虚拟机的理解版八股文，图文并茂，非常容易消化和吸收。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/jvm-a11893df-e518-4bdc-a166-884b168a8cf0.png" alt=""></p><p>为了方便大家的阅读和背诵，我已经将其整理到了二哥的小破站《Java 程序员进阶之路》上，面渣逆袭 Java 虚拟机篇：</p><blockquote><p><a href="https://tobebetterjavaer.com/sidebar/sanfene/jvm.html" target="_blank" rel="noopener noreferrer">https://tobebetterjavaer.com/sidebar/sanfene/jvm.html<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>Java 虚拟机八股文（背诵版）：</p><blockquote><p><a href="https://tobebetterjavaer.com/baguwen/jvm.html" target="_blank" rel="noopener noreferrer">https://tobebetterjavaer.com/baguwen/jvm.html<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>诚实点说，如果能把这两份八股文背会/理解的话，简历上就真的敢写“精通”Java 虚拟机了。</p><h3 id="五、学习-jvm-的一点小心得" tabindex="-1"><a class="header-anchor" href="#五、学习-jvm-的一点小心得" aria-hidden="true">#</a> 五、学习 JVM 的一点小心得</h3><p>和 C++ 相比，Java 的内存管理机制可以说是一大特色，Java 开发不再需要自己去写代码手动释放内存，甚至你想自己干，JVM 都不给你这个机会，虚拟机完全掌握了 Java 内存的控制权。</p><p>这看起来挺美好的，但并不意味着Java 开发就可以随意写代码，随意使用内存，从我多年的使用体验来看，内存溢出和内存泄露还是会时不时发生的，尤其是初学阶段，尤其在开启多线程的情况下。</p><p>一旦出现内存溢出或者内存泄露，排查问题还是挺困难的，所以知道逊尼基到底是怎么管理内存的就变得十分重要了。</p><p><a href="https://tobebetterjavaer.com/jvm/gc.html" target="_blank" rel="noopener noreferrer">JVM 的垃圾回收<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，其实就是收拾那些不再使用的 Java 对象，把他们曾经占用的内存重新释放出来。所以我们要搞清楚：</p><ul><li><a href="https://tobebetterjavaer.com/jvm/whereis-the-object.html" target="_blank" rel="noopener noreferrer">对象是如何创建的<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>？对象是如何被访问的？到底哪些对象是废弃的？于是我们就需要搞清楚对象的生和死。</li><li>这些废弃了的对象到底放在哪？于是就需要了解<a href="https://tobebetterjavaer.com/jvm/neicun-jiegou.html" target="_blank" rel="noopener noreferrer">JVM 的内存结构<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>：方法区、堆、程序计数器、虚拟机栈和本地方法栈。</li><li>这些废弃了的对象会不会造成内存泄露（OOM，OutOfMemoryError）？于是我们就需要了解每个分区的 OOM。</li><li>这些废弃了对象什么时候被回收？于是我们就需要了解垃圾回收算法，比如说清除算法、复制算法、标记整理算法和分代收集算法。</li></ul><p>知道了一个对象在内存中的生和死，我们还需要知道类是如何在内存中变成对象的？对象的方法是如何执行的？</p><p>于是我们开始学习 Java 虚拟机的执行过程，学习<a href="https://tobebetterjavaer.com/jvm/class-file-jiegou.html" target="_blank" rel="noopener noreferrer">字节码文件<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>（ .class 文件），学习<a href="https://tobebetterjavaer.com/jvm/class-load.html" target="_blank" rel="noopener noreferrer">类的加载机制<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，学习<a href="https://tobebetterjavaer.com/jvm/how-jvm-run-zijiema-zhiling.html" target="_blank" rel="noopener noreferrer">虚拟机栈的栈帧结构<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，学习方法的调用过程，学习<a href="https://tobebetterjavaer.com/jvm/zijiema-zhiling.html" target="_blank" rel="noopener noreferrer">字节码指令<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>等等。</p><p>为了监控虚拟机和故障排查，我们需要学习<a href="https://tobebetterjavaer.com/jvm/problem-tools.html" target="_blank" rel="noopener noreferrer">常用的 JDK 命令行工具<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，掌握必要的线上问题排查方法；此外，还需要了解 JIT (Just In Time)并不是简单的将热点代码编译成机器码就收工的，它还会对代码的执行进行优化（<a href="https://tobebetterjavaer.com/jvm/jit.html" target="_blank" rel="noopener noreferrer">方法内联和逃逸分析<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>）。</p><p>JVM 相关的知识已经成为面试必考的科目了，但老实讲，JVM 相关的知识还真的不太好用在项目中，或者说不太好在项目中体现出来。</p><p>那这里给大家推荐一个实战项目，基于 Spring Boot 的在线 Java IDE，可以远程执行 Java 代码并将程序的运行结果反馈出来。涉及了 Java 类文件的结构、Java 类加载器和 Java 类的热替换等 JVM 相关的技术。</p><blockquote><p><a href="https://github.com/TangBean/OnlineExecutor" target="_blank" rel="noopener noreferrer">https://github.com/TangBean/OnlineExecutor<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>听我这么一说，是不是一下子就清晰多了！</p><p>另外，需要 Java 学习资料的话，可以直接戳我整理的这个 GitHub/码云仓库——📚Java程序员必读书单整理，附下载地址，助力每一个Java程序员构建属于自己的知识体系。包括但不限于Java、设计模式、计算机网络、操作系统、数据库、数据结构与算法、大数据、架构、面试等等。</p><ul><li>GitHub 地址：<a href="https://github.com/itwanger/JavaBooks" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/JavaBooks<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li>码云地址：<a href="https://gitee.com/itwanger/JavaBooks" target="_blank" rel="noopener noreferrer">https://gitee.com/itwanger/JavaBooks<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul><p>给大家截图展示一下里面都有哪些优质的 PDF：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/java-books.jpg" alt=""></p><p><strong>Java 虚拟机虽然难学，但如果你能坚持学下去，内功自然而然就提升了一大截</strong>。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/xuexiluxian/java/jvm.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 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class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 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role>并发编程</li></ul><meta property="keywords" content="Java,并发编程"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 11 分钟</span><meta property="timeRequired" content="PT11M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/java/thread.html#一、为什么要学-java-并发" class="router-link-active router-link-exact-active toc-link level3">一、为什么要学 Java 并发？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/java/thread.html#二、java-并发学习路线图" class="router-link-active router-link-exact-active toc-link level3">二、Java 并发学习路线图</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/java/thread.html#三、硬核-java-并发学习资料" class="router-link-active router-link-exact-active toc-link level3">三、硬核 Java 并发学习资料</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/java/thread.html#四、优质八股文" class="router-link-active router-link-exact-active toc-link level3">四、优质八股文</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/java/thread.html#五、java-并发学习心得" class="router-link-active router-link-exact-active toc-link level3">五、Java 并发学习心得</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="java并发编程学习路线-建议收藏" tabindex="-1"><a class="header-anchor" href="#java并发编程学习路线-建议收藏" aria-hidden="true">#</a> Java并发编程学习路线（建议收藏👍）</h1><p>众所周知，Java 并发是 Java 程序员必须懂但又很难懂的一块知识点。一般来说，很少有人敢说自己精通 Java 并发的，一是容易被面试官吊打，二是并发编程涉及到操作系统、内存、CPU 等计算机专业比较核心的内容，比较考验一个程序员的内功。</p><p>今天这篇文章就来给大家盘点一下 Java 并发到底该如何从入门到精通，请及时用鸡毛掸子把收藏夹里的灰清理一下。在阅读过程中，如果有所帮助，麻烦点赞/收藏和转发，算是对我码字的这份坚持的亿点点鼓励。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java-thread-1.gif" alt=""></p><h3 id="一、为什么要学-java-并发" tabindex="-1"><a class="header-anchor" href="#一、为什么要学-java-并发" aria-hidden="true">#</a> 一、为什么要学 Java 并发？</h3><p>有句话不知道当讲不当讲，先讲了再说，就是“如果你只想 CURD，那么 Java 并发不学也罢！”但其实呢，大家都已经被教育的很有涵养了，工作中拧不拧螺丝不重要，重要的是面试一定要会造火箭，不然面试的机会都很难捞得到。</p><p>那作为 Java 体系中非常重要的一环，Java 并发自然是必须要掌握的，最起码也得会起个多线程吧？哈哈哈。高级点的，像平常开发中用到的 Tomcat 服务器、消息中间件、RPC 框架等等，它们的底层都涉及到了并发编程。</p><p>当然了，Java 并发涉及到东西实在是不少，包括操作系统的知识，Java 虚拟机的一些知识，Java 线程模型的知识，多线程相关的关键字，比如说 synchronized、volatile 等，还有锁的知识、JDK 提供的工具类等等，学起来还是非常容易令人头大的。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java-thread-2.png" alt=""></p><p>因此，我们需要一些高效的学习路线图，以及一些优质的学习资源，从而减少我们学习Java 并发编程所投入的时间和精力。</p><h3 id="二、java-并发学习路线图" tabindex="-1"><a class="header-anchor" href="#二、java-并发学习路线图" aria-hidden="true">#</a> 二、Java 并发学习路线图</h3><p>这是我最近整理的一张关于 Java 并发编程的思维导图，大的方向可以分为三个部分：线程基础、理论基础、工具类 JUC。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java-thread-map.png" alt=""></p><p>线程基础部分包括：</p><ul><li>线程的创建方式</li><li>线程的状态切换</li><li>线程的基本操作</li><li>线程组和线程优先级</li></ul><p>理论基础包括：</p><ul><li>进程和线程的区别</li><li>多线程解决了什么问题，又带来了什么问题？</li><li>如何解决并发问题？包括 Java 内存模型，以及两个常见的关键字 volatile 和 synchronized</li></ul><p>工具类 JUC 包括：</p><ul><li>锁 Lock 系的 AQS、ReentrantLock、ReentrantReadWriteLock、Condition、LockSupport</li><li>并发容器系的 ConcurrentHashMap、ConcurrentLinkedQueue、CopyOnWriteArrayList、ThreadLocal、BlockingQueue</li><li>线程池系的 ThreadPoolExecutor、ScheduledThreadPoolExecutor</li><li>原子系的 AtomicInteger、AtomicIntegerArray、AtomicReference 等等</li><li>通信工具系的倒计时器 CountDownLatch、循环栅栏 CyclicBarrier、资源访问控制 Semaphore、数据交换 Exchanger、移相器Phaser</li><li>Fork/Join框架</li></ul><p>最后再来个经典的生产者消费者模式进行实践，整个 Java 并发体系就学得非常扎实了！</p><h3 id="三、硬核-java-并发学习资料" tabindex="-1"><a class="header-anchor" href="#三、硬核-java-并发学习资料" aria-hidden="true">#</a> 三、硬核 Java 并发学习资料</h3><p><strong>1）Java 程序员进阶之路</strong></p><p>学 Java，当然要找 Java 程序员进阶之路，网址我贴下面了哈：</p><blockquote><p><a href="https://tobebetterjavaer.com/home.html#java%E5%B9%B6%E5%8F%91%E7%BC%96%E7%A8%8B" target="_blank" rel="noopener noreferrer">https://tobebetterjavaer.com/home.html#java并发编程<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>进去直接找 Java 核心里面的 Java 并发编程就对了。我按照前面的思维导图整理了 27 篇文章，全部都是硬核级别的，跟着学就对了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java-thread-map-1.png" alt=""></p><p><strong>2）视频</strong></p><p>懂的都懂，看视频到 B 站。黑马的《Java并发编程》评价还不错，300 多个小节，我觉得讲的比较好的有三部分：synchronized优化原理、AQS和线程池。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java-thread-4.png" alt=""></p><blockquote><p>视频地址：<a href="https://www.bilibili.com/video/BV16J411h7Rd" target="_blank" rel="noopener noreferrer">https://www.bilibili.com/video/BV16J411h7Rd<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><strong>3）书籍</strong></p><p>纸质书只推荐一本《<a href="https://book.douban.com/subject/10484692/" target="_blank" rel="noopener noreferrer">Java 并发编程实战<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>》，豆瓣评分 9.0。不过这本书确实有点老了，基本上是按照 Java 6 来讲解的，希望出版社能早点出 2.0 版。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java-thread-5.png" alt=""></p><p>《Java 并发编程实战》这本书从总体上来看，分两条主线：</p><ul><li>介绍 Java 并发包的重要组件和原理</li><li>如何利用这些组件来保证线程安全</li></ul><p>到底该如何获得线程安全呢？背会并理解下面这段话：</p><blockquote><p>Writing thread-safe code is, at its core, about managing access to state, and in particular to shared, mutable state.</p></blockquote><p>如果发现不是很好懂，想从国内作者下手的话，可以尝试一下《<a href="https://book.douban.com/subject/26591326/" target="_blank" rel="noopener noreferrer">Java并发编程的艺术<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>》和《<a href="https://book.douban.com/subject/35634953/" target="_blank" rel="noopener noreferrer">图解Java并发编程<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>》这两本书，虽然豆瓣上评分一般，但对于构建 Java 并发的知识体系还是有很大帮助的。</p><p>之后，再去啃《Java 并发编程实战》就会发现没有以前那么费劲了，这本书之所以被誉为 Java 并发编程的圣经，确实可以看得出作者在并发编程方面有着丰富的经验。</p><p><strong>4）开源电子书</strong></p><p>推荐 RedSpider社区的<a href="http://concurrent.redspider.group/RedSpider.html" target="_blank" rel="noopener noreferrer">深入浅出 Java 多线程<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，比Java 并发编程实战更通俗易懂一些，因为里面穿插了很多精美的手绘图。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java-thread-6.png" alt=""></p><blockquote><p>GitHub地址：<a href="https://github.com/RedSpider1/concurrent" target="_blank" rel="noopener noreferrer">https://github.com/RedSpider1/concurrent<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>考虑到有些小伙伴可能需要 <a href="https://mp.weixin.qq.com/s/pxKrjw_5NTdZfHOKCkwn8w" target="_blank" rel="noopener noreferrer">PDF 版本<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，我花了一周的时间整理了一份，需要的小伙伴请扫描下方的二维码关注作者的原创公众号「<strong>沉默王二</strong>」回复关键字「<strong>并发</strong>」就可以拉取到了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongzhonghao.png" alt="扫码关注后回复「并发」关键字"></p><p>再推荐一份 GitHub 上星标 3.6k+ 的 Java 并发知识点总结：</p><blockquote><p><a href="https://github.com/CL0610/Java-concurrency" target="_blank" rel="noopener noreferrer">https://github.com/CL0610/Java-concurrency<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>仓库里有一句话我非常喜欢，也分享给各位小伙伴：</p><blockquote><p>努力的意义，就是，在以后的日子里，放眼望去全是自己喜欢的人和事！</p></blockquote><p><strong>5）付费专栏</strong></p><p>王宝令老师在极客时间上开了一门《Java 并发编程实战》的付费专栏，质量还是挺高的，喜欢的小伙伴可以戳<a href="http://gk.link/a/11cBH" target="_blank" rel="noopener noreferrer">链接<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>去购买。</p><h3 id="四、优质八股文" tabindex="-1"><a class="header-anchor" href="#四、优质八股文" aria-hidden="true">#</a> 四、优质八股文</h3><p>这里给大家推荐两份 Java 并发编程方面的八股文，一份来自<a href="https://mp.weixin.qq.com/s/1jhBZrAb7bnvkgN1TgAUpw" target="_blank" rel="noopener noreferrer">三分恶<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，一份来自小牛，先截图给大家看一下 Java 并发方面都有哪些高频的面试题。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java-thread-7.png" alt=""></p><p>为了方便大家的阅读和背诵，我已经将其整理到了二哥的小破站《Java 程序员进阶之路》上，面渣逆袭 Java 并发篇：</p><blockquote><p><a href="https://tobebetterjavaer.com/sidebar/sanfene/javathread.html" target="_blank" rel="noopener noreferrer">https://tobebetterjavaer.com/sidebar/sanfene/javathread.html<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>Java 并发编程八股文（背诵版）：</p><blockquote><p><a href="https://tobebetterjavaer.com/baguwen/java-thread.html" target="_blank" rel="noopener noreferrer">https://tobebetterjavaer.com/baguwen/java-thread.html<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>这两份八股文的质量都非常高，来看一下AQS了解多少小节下的内容，图文并茂，非常容易消化和吸收。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java-thread-8.png" alt=""></p><p>诚实点说，如果能把这两份八股文背会的话，简历上就真的敢写“精通”Java 并发了。</p><h3 id="五、java-并发学习心得" tabindex="-1"><a class="header-anchor" href="#五、java-并发学习心得" aria-hidden="true">#</a> 五、Java 并发学习心得</h3><p>Java 提供的并发组件，大致可以分为两类：</p><ul><li>从预防阶段下手，防止错误发生，比如说 synchronized 关键字</li><li>一旦发生错误能及时重试，比如说 CAS</li></ul><p>对于线程数量比较多的并发场景，采用预防的措施会比较合理，这样大部分线程就不会因为小概率时间的 CAS 重试浪费掉大量的 CPU 周期；在线程数量小的时候，CAS 的意义就比较大，因为预防措施带来的线程切换要比 CAS 等待的开销更大。</p><p>想要学好 Java 并发编程，就必须得对下图中提到的基础概念进行充分的理解。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java-thread-9.jpg" alt=""></p><p>在我看来，并发编程主要是用来解决这两个痛点的：</p><ul><li>多个线程对同一变量造成的不一致问题；</li><li>为提高性能，计算机的很多执行单元都配备了缓存，那势必会影响并发编程的数据一致性。</li></ul><p>需要提醒一点的是，多线程并发虽然是用来解决性能问题的，但并不意味着所有情况下都需要开启多线程，有时候反而会适得其反，那如果不是特别要求，尽量不要过早开启多线程。</p><p>并发编程是 Java 体系当中相对难掌握的一块知识点，比较考验一名程序员的内功，其实并发编程最早的应用领域就是操作系统的实现。</p><p>如果你已经有一定的编程经验，建议先学一下《计算机组成原理》，对操作系统、内存、CPU 先进行一些大致的了解，然后再来学习 Java 并发编程，可能就会感觉舒服多了！</p><p>结合我多年的工作经验来看，并发编程可以抽象成<strong>三个核心问题：分工、同步和互斥</strong>。</p><p>1）分工</p><p>分工指的是如何高效地拆解任务并分配给线程，像并发编程领域的一些设计模式，比如说生产者与消费者就是用来进行分工的。</p><p>2）同步</p><p>同步指的是线程之间如何协作，一个线程执行完了一个任务，要通知另外一个线程开工。还拿生产者-消费者模型来说吧，当队列满的时候，生产者线程等待，当队列不满的时候，生产者线程需要被唤醒重新执行；当队列空的时候，消费者线程开始等待，不空的时候，消费者线程被重新唤醒。</p><p>3）互斥</p><p>互斥指的是保证同一时刻只有一个线程访问共享资源，是解决线程安全问题的杀手锏。</p><p>当多个线程同时访问一个共享变量的时候，很容易出现“线程安全”问题，因为结果可能是不确定的——导致出现这个问题的根源就是可见性、有序性和原子性——为了解决它们，Java 引入了内存模型的概念，可以在一定程度上缓解“线程安全”的问题，但要想完全解决“线程安全”问题，还得靠互斥。</p><p>互斥的核心技术就是锁，比如说 synchronized，还有各种 Lock。</p><p>锁可以解决线程安全的问题，但同时也就意味着程序的性能要受到影响。</p><p>因此，Java 提供了针对不同场景下的锁，比如说读写锁 ReadWriteLock，可以解决多线程同时读，但只有一个线程能写的问题；但 ReadWriteLock 也有自己的问题，就是如果有线程正在读，写线程需要等待度线程释放锁后才能获得写锁，也就是读的过程中不允许写，属于一种悲观的读锁。</p><p>为了进一步提升并发执行的效率，Java 8 引入了一个新的读写锁 StampedLock，与ReadWriteLock 相比，StampedLock的优势在于读的过程中也允许获取写锁后写入，但带来的问题就是可能读的数据不一致，需要一点额外的代码来判断读的过程中是否有写入，本质上是一种乐观的锁。</p><p>乐观锁的意思就是估计读的过程中大概率不会有写入，而悲观锁则是读的过程中拒绝有写入，两者的区别就在于性能上会有差异，乐观锁需要针对小概率事件进行多一步的检测，但性能也会有所提升；悲观锁更能保证“线程安全性”。</p><p>听我这么一说，是不是一下子就清晰多了！</p><p>另外，需要 Java 学习资料的话，可以直接戳我整理的这个 GitHub/码云仓库——📚Java程序员必读书单整理，附下载地址，助力每一个Java程序员构建属于自己的知识体系。包括但不限于Java、设计模式、计算机网络、操作系统、数据库、数据结构与算法、大数据、架构、面试等等。</p><ul><li>GitHub 地址：<a href="https://github.com/itwanger/JavaBooks" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/JavaBooks<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li>码云地址：<a href="https://gitee.com/itwanger/JavaBooks" target="_blank" rel="noopener noreferrer">https://gitee.com/itwanger/JavaBooks<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul><p>给大家截图展示一下里面都有哪些优质的 PDF：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/java-books.jpg" alt=""></p><p><strong>Java 并发编程虽然难学，会涉及到操作系统、CPU、内存等偏基础方面的内容，但如果你能坚持学下去，内功自然而然就提升了一大截</strong>。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/xuexiluxian/java/thread.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 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class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/xuexiluxian/lanqiaobei.html" class="nav-link sidebar-link sidebar-page" aria-label="蓝桥杯学习路线"><!---->蓝桥杯学习路线<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/xuexiluxian/algorithm.html" class="nav-link sidebar-link sidebar-page" aria-label="算法和数据结构学习路线"><!---->算法和数据结构学习路线<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java并发编程学习路线（建议收藏👍）</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 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01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月15日</span><meta property="datePublished" content="2022-03-15T00:39:03.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 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xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li><li class="tag tag6" role>并发编程</li></ul><meta property="keywords" content="Java,并发编程"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 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class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/java/thread.html#一、为什么要学-java-并发" class="router-link-active router-link-exact-active toc-link level3">一、为什么要学 Java 并发？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/java/thread.html#二、java-并发学习路线图" class="router-link-active router-link-exact-active toc-link level3">二、Java 并发学习路线图</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/java/thread.html#三、硬核-java-并发学习资料" class="router-link-active router-link-exact-active toc-link level3">三、硬核 Java 并发学习资料</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/java/thread.html#四、优质八股文" class="router-link-active router-link-exact-active toc-link level3">四、优质八股文</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/java/thread.html#五、java-并发学习心得" class="router-link-active router-link-exact-active toc-link level3">五、Java 并发学习心得</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="java并发编程学习路线-建议收藏" tabindex="-1"><a class="header-anchor" href="#java并发编程学习路线-建议收藏" aria-hidden="true">#</a> Java并发编程学习路线（建议收藏👍）</h1><p>众所周知，Java 并发是 Java 程序员必须懂但又很难懂的一块知识点。一般来说，很少有人敢说自己精通 Java 并发的，一是容易被面试官吊打，二是并发编程涉及到操作系统、内存、CPU 等计算机专业比较核心的内容，比较考验一个程序员的内功。</p><p>今天这篇文章就来给大家盘点一下 Java 并发到底该如何从入门到精通，请及时用鸡毛掸子把收藏夹里的灰清理一下。在阅读过程中，如果有所帮助，麻烦点赞/收藏和转发，算是对我码字的这份坚持的亿点点鼓励。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java-thread-1.gif" alt=""></p><h3 id="一、为什么要学-java-并发" tabindex="-1"><a class="header-anchor" href="#一、为什么要学-java-并发" aria-hidden="true">#</a> 一、为什么要学 Java 并发？</h3><p>有句话不知道当讲不当讲，先讲了再说，就是“如果你只想 CURD，那么 Java 并发不学也罢！”但其实呢，大家都已经被教育的很有涵养了，工作中拧不拧螺丝不重要，重要的是面试一定要会造火箭，不然面试的机会都很难捞得到。</p><p>那作为 Java 体系中非常重要的一环，Java 并发自然是必须要掌握的，最起码也得会起个多线程吧？哈哈哈。高级点的，像平常开发中用到的 Tomcat 服务器、消息中间件、RPC 框架等等，它们的底层都涉及到了并发编程。</p><p>当然了，Java 并发涉及到东西实在是不少，包括操作系统的知识，Java 虚拟机的一些知识，Java 线程模型的知识，多线程相关的关键字，比如说 synchronized、volatile 等，还有锁的知识、JDK 提供的工具类等等，学起来还是非常容易令人头大的。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java-thread-2.png" alt=""></p><p>因此，我们需要一些高效的学习路线图，以及一些优质的学习资源，从而减少我们学习Java 并发编程所投入的时间和精力。</p><h3 id="二、java-并发学习路线图" tabindex="-1"><a class="header-anchor" href="#二、java-并发学习路线图" aria-hidden="true">#</a> 二、Java 并发学习路线图</h3><p>这是我最近整理的一张关于 Java 并发编程的思维导图，大的方向可以分为三个部分：线程基础、理论基础、工具类 JUC。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java-thread-map.png" alt=""></p><p>线程基础部分包括：</p><ul><li>线程的创建方式</li><li>线程的状态切换</li><li>线程的基本操作</li><li>线程组和线程优先级</li></ul><p>理论基础包括：</p><ul><li>进程和线程的区别</li><li>多线程解决了什么问题，又带来了什么问题？</li><li>如何解决并发问题？包括 Java 内存模型，以及两个常见的关键字 volatile 和 synchronized</li></ul><p>工具类 JUC 包括：</p><ul><li>锁 Lock 系的 AQS、ReentrantLock、ReentrantReadWriteLock、Condition、LockSupport</li><li>并发容器系的 ConcurrentHashMap、ConcurrentLinkedQueue、CopyOnWriteArrayList、ThreadLocal、BlockingQueue</li><li>线程池系的 ThreadPoolExecutor、ScheduledThreadPoolExecutor</li><li>原子系的 AtomicInteger、AtomicIntegerArray、AtomicReference 等等</li><li>通信工具系的倒计时器 CountDownLatch、循环栅栏 CyclicBarrier、资源访问控制 Semaphore、数据交换 Exchanger、移相器Phaser</li><li>Fork/Join框架</li></ul><p>最后再来个经典的生产者消费者模式进行实践，整个 Java 并发体系就学得非常扎实了！</p><h3 id="三、硬核-java-并发学习资料" tabindex="-1"><a class="header-anchor" href="#三、硬核-java-并发学习资料" aria-hidden="true">#</a> 三、硬核 Java 并发学习资料</h3><p><strong>1）Java 程序员进阶之路</strong></p><p>学 Java，当然要找 Java 程序员进阶之路，网址我贴下面了哈：</p><blockquote><p><a href="https://tobebetterjavaer.com/home.html#java%E5%B9%B6%E5%8F%91%E7%BC%96%E7%A8%8B" target="_blank" rel="noopener noreferrer">https://tobebetterjavaer.com/home.html#java并发编程<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>进去直接找 Java 核心里面的 Java 并发编程就对了。我按照前面的思维导图整理了 27 篇文章，全部都是硬核级别的，跟着学就对了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java-thread-map-1.png" alt=""></p><p><strong>2）视频</strong></p><p>懂的都懂，看视频到 B 站。黑马的《Java并发编程》评价还不错，300 多个小节，我觉得讲的比较好的有三部分：synchronized优化原理、AQS和线程池。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java-thread-4.png" alt=""></p><blockquote><p>视频地址：<a href="https://www.bilibili.com/video/BV16J411h7Rd" target="_blank" rel="noopener noreferrer">https://www.bilibili.com/video/BV16J411h7Rd<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><strong>3）书籍</strong></p><p>纸质书只推荐一本《<a href="https://book.douban.com/subject/10484692/" target="_blank" rel="noopener noreferrer">Java 并发编程实战<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>》，豆瓣评分 9.0。不过这本书确实有点老了，基本上是按照 Java 6 来讲解的，希望出版社能早点出 2.0 版。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java-thread-5.png" alt=""></p><p>《Java 并发编程实战》这本书从总体上来看，分两条主线：</p><ul><li>介绍 Java 并发包的重要组件和原理</li><li>如何利用这些组件来保证线程安全</li></ul><p>到底该如何获得线程安全呢？背会并理解下面这段话：</p><blockquote><p>Writing thread-safe code is, at its core, about managing access to state, and in particular to shared, mutable state.</p></blockquote><p>如果发现不是很好懂，想从国内作者下手的话，可以尝试一下《<a href="https://book.douban.com/subject/26591326/" target="_blank" rel="noopener noreferrer">Java并发编程的艺术<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>》和《<a href="https://book.douban.com/subject/35634953/" target="_blank" rel="noopener noreferrer">图解Java并发编程<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>》这两本书，虽然豆瓣上评分一般，但对于构建 Java 并发的知识体系还是有很大帮助的。</p><p>之后，再去啃《Java 并发编程实战》就会发现没有以前那么费劲了，这本书之所以被誉为 Java 并发编程的圣经，确实可以看得出作者在并发编程方面有着丰富的经验。</p><p><strong>4）开源电子书</strong></p><p>推荐 RedSpider社区的<a href="http://concurrent.redspider.group/RedSpider.html" target="_blank" rel="noopener noreferrer">深入浅出 Java 多线程<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，比Java 并发编程实战更通俗易懂一些，因为里面穿插了很多精美的手绘图。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java-thread-6.png" alt=""></p><blockquote><p>GitHub地址：<a href="https://github.com/RedSpider1/concurrent" target="_blank" rel="noopener noreferrer">https://github.com/RedSpider1/concurrent<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>考虑到有些小伙伴可能需要 <a href="https://mp.weixin.qq.com/s/pxKrjw_5NTdZfHOKCkwn8w" target="_blank" rel="noopener noreferrer">PDF 版本<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，我花了一周的时间整理了一份，需要的小伙伴请扫描下方的二维码关注作者的原创公众号「<strong>沉默王二</strong>」回复关键字「<strong>并发</strong>」就可以拉取到了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongzhonghao.png" alt="扫码关注后回复「并发」关键字"></p><p>再推荐一份 GitHub 上星标 3.6k+ 的 Java 并发知识点总结：</p><blockquote><p><a href="https://github.com/CL0610/Java-concurrency" target="_blank" rel="noopener noreferrer">https://github.com/CL0610/Java-concurrency<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>仓库里有一句话我非常喜欢，也分享给各位小伙伴：</p><blockquote><p>努力的意义，就是，在以后的日子里，放眼望去全是自己喜欢的人和事！</p></blockquote><p><strong>5）付费专栏</strong></p><p>王宝令老师在极客时间上开了一门《Java 并发编程实战》的付费专栏，质量还是挺高的，喜欢的小伙伴可以戳<a href="http://gk.link/a/11cBH" target="_blank" rel="noopener noreferrer">链接<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>去购买。</p><h3 id="四、优质八股文" tabindex="-1"><a class="header-anchor" href="#四、优质八股文" aria-hidden="true">#</a> 四、优质八股文</h3><p>这里给大家推荐两份 Java 并发编程方面的八股文，一份来自<a href="https://mp.weixin.qq.com/s/1jhBZrAb7bnvkgN1TgAUpw" target="_blank" rel="noopener noreferrer">三分恶<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，一份来自小牛，先截图给大家看一下 Java 并发方面都有哪些高频的面试题。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java-thread-7.png" alt=""></p><p>为了方便大家的阅读和背诵，我已经将其整理到了二哥的小破站《Java 程序员进阶之路》上，面渣逆袭 Java 并发篇：</p><blockquote><p><a href="https://tobebetterjavaer.com/sidebar/sanfene/javathread.html" target="_blank" rel="noopener noreferrer">https://tobebetterjavaer.com/sidebar/sanfene/javathread.html<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>Java 并发编程八股文（背诵版）：</p><blockquote><p><a href="https://tobebetterjavaer.com/baguwen/java-thread.html" target="_blank" rel="noopener noreferrer">https://tobebetterjavaer.com/baguwen/java-thread.html<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>这两份八股文的质量都非常高，来看一下AQS了解多少小节下的内容，图文并茂，非常容易消化和吸收。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java-thread-8.png" alt=""></p><p>诚实点说，如果能把这两份八股文背会的话，简历上就真的敢写“精通”Java 并发了。</p><h3 id="五、java-并发学习心得" tabindex="-1"><a class="header-anchor" href="#五、java-并发学习心得" aria-hidden="true">#</a> 五、Java 并发学习心得</h3><p>Java 提供的并发组件，大致可以分为两类：</p><ul><li>从预防阶段下手，防止错误发生，比如说 synchronized 关键字</li><li>一旦发生错误能及时重试，比如说 CAS</li></ul><p>对于线程数量比较多的并发场景，采用预防的措施会比较合理，这样大部分线程就不会因为小概率时间的 CAS 重试浪费掉大量的 CPU 周期；在线程数量小的时候，CAS 的意义就比较大，因为预防措施带来的线程切换要比 CAS 等待的开销更大。</p><p>想要学好 Java 并发编程，就必须得对下图中提到的基础概念进行充分的理解。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java-thread-9.jpg" alt=""></p><p>在我看来，并发编程主要是用来解决这两个痛点的：</p><ul><li>多个线程对同一变量造成的不一致问题；</li><li>为提高性能，计算机的很多执行单元都配备了缓存，那势必会影响并发编程的数据一致性。</li></ul><p>需要提醒一点的是，多线程并发虽然是用来解决性能问题的，但并不意味着所有情况下都需要开启多线程，有时候反而会适得其反，那如果不是特别要求，尽量不要过早开启多线程。</p><p>并发编程是 Java 体系当中相对难掌握的一块知识点，比较考验一名程序员的内功，其实并发编程最早的应用领域就是操作系统的实现。</p><p>如果你已经有一定的编程经验，建议先学一下《计算机组成原理》，对操作系统、内存、CPU 先进行一些大致的了解，然后再来学习 Java 并发编程，可能就会感觉舒服多了！</p><p>结合我多年的工作经验来看，并发编程可以抽象成<strong>三个核心问题：分工、同步和互斥</strong>。</p><p>1）分工</p><p>分工指的是如何高效地拆解任务并分配给线程，像并发编程领域的一些设计模式，比如说生产者与消费者就是用来进行分工的。</p><p>2）同步</p><p>同步指的是线程之间如何协作，一个线程执行完了一个任务，要通知另外一个线程开工。还拿生产者-消费者模型来说吧，当队列满的时候，生产者线程等待，当队列不满的时候，生产者线程需要被唤醒重新执行；当队列空的时候，消费者线程开始等待，不空的时候，消费者线程被重新唤醒。</p><p>3）互斥</p><p>互斥指的是保证同一时刻只有一个线程访问共享资源，是解决线程安全问题的杀手锏。</p><p>当多个线程同时访问一个共享变量的时候，很容易出现“线程安全”问题，因为结果可能是不确定的——导致出现这个问题的根源就是可见性、有序性和原子性——为了解决它们，Java 引入了内存模型的概念，可以在一定程度上缓解“线程安全”的问题，但要想完全解决“线程安全”问题，还得靠互斥。</p><p>互斥的核心技术就是锁，比如说 synchronized，还有各种 Lock。</p><p>锁可以解决线程安全的问题，但同时也就意味着程序的性能要受到影响。</p><p>因此，Java 提供了针对不同场景下的锁，比如说读写锁 ReadWriteLock，可以解决多线程同时读，但只有一个线程能写的问题；但 ReadWriteLock 也有自己的问题，就是如果有线程正在读，写线程需要等待度线程释放锁后才能获得写锁，也就是读的过程中不允许写，属于一种悲观的读锁。</p><p>为了进一步提升并发执行的效率，Java 8 引入了一个新的读写锁 StampedLock，与ReadWriteLock 相比，StampedLock的优势在于读的过程中也允许获取写锁后写入，但带来的问题就是可能读的数据不一致，需要一点额外的代码来判断读的过程中是否有写入，本质上是一种乐观的锁。</p><p>乐观锁的意思就是估计读的过程中大概率不会有写入，而悲观锁则是读的过程中拒绝有写入，两者的区别就在于性能上会有差异，乐观锁需要针对小概率事件进行多一步的检测，但性能也会有所提升；悲观锁更能保证“线程安全性”。</p><p>听我这么一说，是不是一下子就清晰多了！</p><p>另外，需要 Java 学习资料的话，可以直接戳我整理的这个 GitHub/码云仓库——📚Java程序员必读书单整理，附下载地址，助力每一个Java程序员构建属于自己的知识体系。包括但不限于Java、设计模式、计算机网络、操作系统、数据库、数据结构与算法、大数据、架构、面试等等。</p><ul><li>GitHub 地址：<a href="https://github.com/itwanger/JavaBooks" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/JavaBooks<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li>码云地址：<a href="https://gitee.com/itwanger/JavaBooks" target="_blank" rel="noopener noreferrer">https://gitee.com/itwanger/JavaBooks<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul><p>给大家截图展示一下里面都有哪些优质的 PDF：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/java-books.jpg" alt=""></p><p><strong>Java 并发编程虽然难学，会涉及到操作系统、CPU、内存等偏基础方面的内容，但如果你能坚持学下去，内功自然而然就提升了一大截</strong>。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/xuexiluxian/java/thread.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 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author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 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19 分钟</span><meta property="timeRequired" content="PT19M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/java/yitiaolong.html#学习java之前可以先学一下c语言" class="router-link-active router-link-exact-active toc-link level2">学习Java之前可以先学一下C语言</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/java/yitiaolong.html#学习java之前要安装的软件" class="router-link-active router-link-exact-active toc-link level2">学习Java之前要安装的软件</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/java/yitiaolong.html#java-学习的重点是什么" class="router-link-active router-link-exact-active toc-link level2">Java 学习的重点是什么</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/java/yitiaolong.html#哪些java知识不需要再学了" class="router-link-active router-link-exact-active toc-link level2">哪些Java知识不需要再学了</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/java/yitiaolong.html#学习java还需要补充哪些知识" class="router-link-active router-link-exact-active toc-link level2">学习Java还需要补充哪些知识</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/java/yitiaolong.html#_1-数据结构与算法" class="router-link-active router-link-exact-active toc-link level3">1）数据结构与算法</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/java/yitiaolong.html#_2-设计模式" class="router-link-active router-link-exact-active toc-link level3">2）设计模式</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/java/yitiaolong.html#_3-jdk源码" class="router-link-active router-link-exact-active toc-link level3">3）JDK源码</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/java/yitiaolong.html#_4-操作系统、计算机组成原理和计算机网络" class="router-link-active router-link-exact-active toc-link level3">4）操作系统、计算机组成原理和计算机网络</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/java/yitiaolong.html#_5-项目管理与架构" class="router-link-active router-link-exact-active toc-link level3">5）项目管理与架构</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/java/yitiaolong.html#最后" class="router-link-active router-link-exact-active toc-link level2">最后</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><p>虽然我是科班出身，但说实话，十多年走过来，无论是 Java 语言本身，还是它配套的工具和框架都发生了巨大的变化。我自己也是一路学习新的知识，一路丢掉废旧的知识。</p><p>现在回头来看，发现自己也走了不少弯路，浪费了不少时间，真的是既遗憾又叹息！</p><p>关注我的读者当中应该有很大一部分是 Java 初学者，因为是初学，所以面临着巨大的压力，不能付出太高的试错成本。而应该寻找一条更高效的学习路线和一套行之有效的学习方法，否则一不小心，很可能会前功尽弃。</p><p>但好在 Java 的学习资料非常丰富，只要我们稍微用心去整理下，就能找出一条高效的学习路径。过去这两年里，我不断地整理自己的思路，分享了不少关于 Java 方面的文章，但都过于分散，借这个机会，我打算重新梳理一遍，希望能对大家的学习有所帮助。</p><h2 id="学习java之前可以先学一下c语言" tabindex="-1"><a class="header-anchor" href="#学习java之前可以先学一下c语言" aria-hidden="true">#</a> 学习Java之前可以先学一下C语言</h2><p>对于科班的同学来说，我建议在学习 Java 这门编程语言之前，学一下 C 语言。我上大学那会，教材用的是《Java 编程思想》，但说真的，这本书对初学者并不友好。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/yitiaolong-d5e5b52c-1744-468c-ab9c-f77c24415394.jpg" alt=""></p><p>编程语言都是相通的，C语言作为 Java 语言的母胎，<strong>还是非常值得科班去学习一下打打基础的</strong>。其实对于我们程序员来说，学的是计算机科学，而不是编程语言，语言只是工具，没有优劣。像我，就学过 Java、C 语言、Ruby、JavaScript 等等这些编程语言，他们之间确实有很多相似之处。如果学过 JavaScript，能很容易搞懂 Java 的 Lambda 表达式。</p><p>C 语言的特殊性就在于它可能是唯一一门最适合来学习一系列计算机基础的媒介，比如 Linux 操作系统，就是用 C 语言重构的；比如计算机网络，里面有很多网络协议，有不同的 header 定义，这些字段用 C 语言的 union 和 struct 来操作非常便捷。Java 中虽然剔除了指针这种烦人的东西，但说白了，引用其实和指针差不多，理解了 C 语言中的指针，就能很好的理解 Java 中的引用。</p><p>当然了，由于 C 语言的抽象程度更高，学起来也需要花费一番功夫。对于科班的初学者来说，我推荐翁恺教授的 C 语言程序设计。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/yitiaolong-82aefde9-8a3f-4f28-aad5-02e39a6b9d4b.png" alt=""></p><blockquote><p>B 站地址：<a href="https://www.bilibili.com/video/BV19W411B7w1" target="_blank" rel="noopener noreferrer">https://www.bilibili.com/video/BV19W411B7w1<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>喜欢看书的同学我只推荐一本，《<strong>阮一峰老师的 C语言入门教程</strong>》，我第一时间就拜读了一遍，受益匪浅！可以说目前我见到的最好的 C语言入门教程了，没有之一！</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/yitiaolong-3507eb06-8424-4b8e-b20d-046268508c9d.png" alt=""></p><p>我第一时间就整理了一份 PDF 版的，需要的小伙伴可以长按识别/扫描下方二维码，关注后回复 「<strong>阮一峰</strong>」 下载这份 PDF 吧：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongzhonghao.png" alt="扫码关注后回复「阮一峰」关键字"></p><p>在学习的过程中切记一点，就是一定要多练多练多练，这一点不仅适合学习 C语言，也适合学习 Java 语言。有句话说得好呀，<strong>看懂了+上万行代码=学会了</strong>。无论是看视频学习，还是看书学习，最怕的就是眼高手低，以为自己看懂了，实际上呢，离学会了还差上万行代码。</p><p>对于非科班的同学来说，如果时间比较紧迫的话，可以直接上手 Java，我觉得只要学习资料选的好，也是完全没有问题的。</p><h2 id="学习java之前要安装的软件" tabindex="-1"><a class="header-anchor" href="#学习java之前要安装的软件" aria-hidden="true">#</a> 学习Java之前要安装的软件</h2><p>工欲善其事必先利其器，战斗之前我们要先配备好武器。</p><p>JDK 是 Java Development ToolKit 的简称，也就是 Java 开发工具包。JDK 是整个 Java 的核心，包括 Java 运行环境（Java Runtime Envirnment，简称 JRE），Java 工具（比如 javac、java、javap 等等），以及 Java 基础类库（比如 rt.jar），学习 Java 之前必须要安装。</p><p>已经 2022 年了，真没必要在记事本上敲代码了。反正我遇到过太多的课程，包括我上大学时候的老师，都一而再再而三的强调，一定要用记事本敲出来第一个程序，并且在命令行里成功运行起来。</p><p>这么多年下来，我觉得这个建议真的是糟糕极了。记事本和命令行，怎么能让初学者上手呢？最起码也得是个老江湖才行啊！当年我就差点被记事本和命令行劝退。</p><p>Intellij IDEA，不用说，是编写 Java 程序的最佳 IDE，初学者选择社区版就完全够用了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/yitiaolong-3fb56f9d-942a-4439-8bab-0f19bd59ef58.png" alt=""></p><p>初次使用的话，建议阅读一下《IntelliJ IDEA 简体中文专题教程》，GitHub 上已开源。</p><blockquote><p>地址：<a href="https://github.com/judasn/IntelliJ-IDEA-Tutorial" target="_blank" rel="noopener noreferrer">https://github.com/judasn/IntelliJ-IDEA-Tutorial<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>Maven 是一个项目管理和自动化构建工具，基于项目对象模型（POM）的概念，可以管理项目的构建、报告以及文档。作为 Apache 组织中的一个颇为成功的开源项目，Maven 主要服务于基于 Java 的项目构建、依赖管理和项目信息管理。有了 Maven 以后，第三方类库管理起来就舒服多了。</p><p>安装和配置教程直接看我写过的这篇文章<a href="https://mp.weixin.qq.com/s/3umZOaI4l0EIZ5RgtEDchw" target="_blank" rel="noopener noreferrer">10分钟，掌握项目构建神器Maven<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>就好了。</p><p>另外，我推荐大家使用 GitHub/码云来作为私有的代码仓库，特别方便，免费还可以云同步。还不太熟悉<a href="https://tobebetterjavaer.com/git/git-qiyuan.html" target="_blank" rel="noopener noreferrer">Git 命令<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>的话，可以下载<a href="https://desktop.github.com/" target="_blank" rel="noopener noreferrer">GitHub 桌面版<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>来傻瓜式地操作。</p><p>这一套软件安装完成后，基本上开发 Java 的必备工具就齐活了。接下来，就可以放心大胆的进入 Java 的世界了。</p><h2 id="java-学习的重点是什么" tabindex="-1"><a class="header-anchor" href="#java-学习的重点是什么" aria-hidden="true">#</a> Java 学习的重点是什么</h2><p>“冰冻三尺非一日之寒”，要想把 Java 学好，还是需要花费一番功夫的。Java 语言的知识点非常多，而我们又时间紧迫，意味着只能挑重点、挑实用，不能面面俱到，<strong>一些不常用的知识点可以直接 pass 掉</strong>。</p><p>我这里给大家贴一张《Java 程序员进阶之路》的导航地图，大类分为 Java 核心、Java 企业级开发、数据库、计算机基础、求职面试、学习资源等，基本上你要的 Java 学习资源，这里都有，没有的，后面我也会补充上。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/yitiaolong-c80191bf-ab08-4a28-898f-ea7ffff3f966.png" alt=""></p><p>Java 是一门面向对象的编程语言，所以三大特性：封装、继承、多态是必须要掌握的，然后是异常处理、IO、集合、并发编程和 Java 虚拟机。只要这些内容掌握了，可以说 Java 语言本身的核心知识就全部掌握了。</p><p>这些知识该怎么学呢？当然是直接上二哥的 Java 程序员进阶之路了，内容非常的全面和硬核，截图给大家鉴赏一下。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/yitiaolong-a5436c4a-6464-4065-ae0d-50755c4184df.png" alt=""></p><p>记住我们的网址：</p><blockquote><p><a href="https://tobebetterjavaer.com/home.html#java%E6%A0%B8%E5%BF%83" target="_blank" rel="noopener noreferrer">https://tobebetterjavaer.com/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>这其中的难点是并发编程和 JVM，显然这两部分的内容学起来并不容易，但却最能考验一名 Java 后端工程师的功底了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/yitiaolong-dac18663-f729-41d6-8253-2473b2174b9e.png" alt="Java 并发编程核心知识点"></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/yitiaolong-35df7e61-99c1-4efc-8f9f-702cc0f08904.png" alt="JVM 核心知识点"></p><p>因为是自学，所以强烈建议大家把教程上的代码都敲一遍，尤其是在初学阶段。由于不像工作后，有大量的项目可以实践，所以不能得到及时的反馈，记笔记就显得特别的重要。另外，一定要分门别类保存好自己的 demo，以便以后可以快速得找得到，尤其是一些小套路，会很有用，积累得多了，可能就变成了自己的工具库。</p><p>一定要善待自己写过的那些小 demo，尤其是那些已经调通的，千万不要扔，没准哪一天能帮上大忙。以我的经验，在学习的过程中，尽管某些知识点在当时理解的多么透彻，但只要时间一长，或者换个开发环境，可能就完蛋，明明感觉代码是一样的，但就是运行不起来。如果手头恰好有这么一个 demo，打开参考一下，甚至拷贝过来试一下，问题就会迎刃而解。</p><p>大部分 Java 程序员都要从事 JavaWeb 的相关开发工作，要开发 JavaWeb，自然就离不开 Spring 的系列框架（之前是 SSM，现在是 Spring Boot）。 但不管怎么演变，Spring 的核心概念仍然是 IOC 和 AOP，也就是控制反转和面向切面编程。</p><p>关于 Spring Boot 的实战内容，二哥也在紧锣密鼓的准备<a href="https://github.com/itwanger/coding-more" target="_blank" rel="noopener noreferrer">编程喵<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>这个实战项目，可以先给大家展示一下后端用到的技术栈，都是非常主流的技术。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhishixingqiu/readme-8.png" alt=""></p><p>如果说你已经掌握了 Spring、SpringMVC、MyBatis、Spring Boot 等内容，就有能力进行一些真正有用的应用项目开发了，比如说学生管理系统、商城系统、博客系统、秒杀系统等等。</p><p>当然了，要做完整的 Java Web 项目，前端的一些知识肯定是少不了的，但不能放太多心思，界面丑点无所谓，重点在 Java 后端上面。</p><p>学习编程就是一个由混沌到有序的过程，如果碰到了理解不了的知识，不要怀疑自己适不适合编程，跳过就行了，这是再正常不过的事了——必须抱有一颗越挫越勇的心。</p><h2 id="哪些java知识不需要再学了" tabindex="-1"><a class="header-anchor" href="#哪些java知识不需要再学了" aria-hidden="true">#</a> 哪些Java知识不需要再学了</h2><p>张无忌在学太极拳的时候，太师父张三丰就对他喊，一定要把之前所学习的武功全部忘掉，<strong>忘得越多就会学得越快</strong>。同样的，自学 Java 的时候一定要先知道哪些 Java 知识不需要再学了，毕竟技术的更新迭代就好像火箭一样快，Java 的一些知识点早已经过时了。如果不懂得断舍离，那学起来就不免太痛苦了。</p><p>1）AWT 和 Swing</p><p>已经 2022 年了，谁还会用 AWT 和 Swing 去开发桌面应用呢？学好后端开发即可，现在是移动互联网时代，基本上都是手机APP、小程序、Web 网页来做前端了，可以把学习的重心放到 Spring Boot、Spring Cloud、Netty、Dubbo、Zookeeper、Mysql上。</p><p>2）Applet</p><p>作为网页插件技术，Applet 压根就没流行起来。</p><p>3）XML</p><p>XML 还没有被淘汰，应用的地方还有不少，比如说 Maven 的 pom.xml 文件里就还在用。但是作为一种数据传输格式，它正在被 JSON 替代。至于复杂的 XML 操作 API（例如 XPath）就完全没必要学习了，如果真的用到了，再去补也不迟。</p><p>4）JDBC</p><p>我个人不建议再学习偏底层的 JDBC 了，尤其是对于时间宝贵的自学程序员来说。与其花这点时间，不如把精力投入到 MyBatis 的学习上。当然了，如果真的有时间，真的想打基础，研究一下也无可厚非。</p><p>5）Struts</p><p>Struts 是早年一个优秀的 MVC 框架，单从技术的角度来看，还是蛮不错的。但是自从有了 SpringMVC 后，Struts 就被拍死在沙滩上了。</p><p>6）Hibernate</p><p>在我刚参加工作那会（2010 年的时候），持久层框架用的正是 Hibernate。但时过境迁，Hibernate 太重量级了，学习成本太高，取而代之的是轻量级的 MyBatis。现在有一种说法就是这种对象关系映射太过死板了，不如直接写 SQL 来得灵活，像我很喜欢的一个轻量级框架 JFinal 就更偏重于在 Java 代码中写 SQL，而不像 MyBatis 和 Hibernate 在 xml 文件中写。</p><p>7）JSP</p><p>JSP 在实际开发中，主要是作为 MVC 模型中的V（View）层出现的。它本来是为 Java 后端程序员开发前端界面而生的，但随着技术的发展，前后端分离的流行，JSP 的生命周期已经到头了。</p><p>8）Servlet</p><p>虽然 SpringMVC 的底层是以 Servlet 为基础的，是 JavaWeb 容器的基石，但 Servlet 的确已经过时了。如果后面有空余时间的话，想钻的话可以钻一下，对服务器端接收请求数据和向前端发送响应数据时会有一些帮助。</p><p>我这样的说法可能不够可观，不够顾及底层知识，但自学的时间成本还是要适当控制一下。<strong>总之，我们应该省下更多的时间去学习前面小节提到的重点知识</strong>！</p><h2 id="学习java还需要补充哪些知识" tabindex="-1"><a class="header-anchor" href="#学习java还需要补充哪些知识" aria-hidden="true">#</a> 学习Java还需要补充哪些知识</h2><h3 id="_1-数据结构与算法" tabindex="-1"><a class="header-anchor" href="#_1-数据结构与算法" aria-hidden="true">#</a> <strong>1）数据结构与算法</strong></h3><p>毫无疑问，数据结构对一名程序员来说非常重要，还是那句话<code>程序=数据结构+算法</code>，这种说法无论放在什么时候都是成立的。</p><p>大部分的<strong>数据结构</strong>课程，关注的重点都在如何从数学上实现一个数据结构，但在实际开发中，大部分主流语言都已经内置了常见的数据结构，比如说 Java。也就是说，对于大部分程序员来说，实际开发中，很难有需求要从零开始实现一个数据结构。因此我们只需要做到下面几点。</p><p>1、熟悉常见数据结构的概念，比如说数组、堆栈、链表、哈希表等。</p><p>2、了解常用数据结构之间的差异，比如说 <a href="https://tobebetterjavaer.com/collection/list-war-2.html" target="_blank" rel="noopener noreferrer">ArrayList 和 LinkedList<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>。</p><p>3、关注常用数据结构的外围算法，比如说如何对 List 和 Map 进行查找。</p><p>4、关注数据结构使用中容易出错的地方，比如说线程是否安全等。</p><p>B 站上浙江大学的一个数据结构课非常不错，很系统很经典。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/yitiaolong-e2812c94-5945-41ad-adcd-4dbb02fae8d5.png" alt=""></p><blockquote><p>视频地址：<a href="https://www.bilibili.com/video/BV1JW411i731" target="_blank" rel="noopener noreferrer">https://www.bilibili.com/video/BV1JW411i731<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>以我接触的领域来说，大部分普通的业务系统都不会涉及到太复杂的<strong>算法</strong>，因此我没有在算法上投入过多时间。但如果你将来要从事一些特殊的领域，如果算法跟不上，可以说是“寸步难行”，比如说图形处理领域，无论是图像的变化还是增强，无一例外都要用到矩阵变换，因此就必然涉及到线性代数的内容，再往深处学的话，必然会牵扯出更多的知识。</p><p>所以学习算法要视情况而定，如果想走算法岗，那么《算法第4版》、《算法导论》、《数学之美》、《编程珠玑》、《剑指offer》这些书都要耐着性子啃一啃。</p><h3 id="_2-设计模式" tabindex="-1"><a class="header-anchor" href="#_2-设计模式" aria-hidden="true">#</a> <strong>2）设计模式</strong></h3><p>我认为<strong>设计模式</strong>是初中级程序员迈向高级程序员的必经之路。有不少程序员，前期冲劲十足，但后继乏力，都是吃了设计模式的亏。在工作的前几年，大部分程序员都处于熟悉编程语言的阶段，也就是处于“技”的阶段，随后就要进入“术”的阶段了。在编程领域，“术”的典型代表就是“设计模式”。</p><p>学习设计模式的话，推荐好朋友小傅哥的《重学 Java 设计模式》。我之前推荐的 Refactoring Guru 网站，也非常的 nice。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/yitiaolong-3b9ab6b9-67f2-4810-bb39-9e1f48ffe3da.png" alt=""></p><blockquote><p>在线阅读地址：<a href="https://refactoring.guru" target="_blank" rel="noopener noreferrer">https://refactoring.guru<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>需要离线版的小伙伴请长按识别/扫描下方的二维码关注作者的原创公众号「<strong>沉默王二</strong>」回复关键字「<strong>设计模式</strong>」就可以拉取到了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongzhonghao.png" alt="扫码关注后回复「设计模式」关键字"></p><h3 id="_3-jdk源码" tabindex="-1"><a class="header-anchor" href="#_3-jdk源码" aria-hidden="true">#</a> <strong>3）JDK源码</strong></h3><p>面试的时候，面试官都特别喜欢问一些源码方面的知识，比如说 HashMap 的一些经典问题：</p><ul><li>加载因子为什么是 0.75？</li><li>为什么链表改为红黑树的阈值是 8?</li><li>HashMap的底层数据结构是什么？</li><li>解决hash冲突的办法有哪些？</li><li>HashMap数组的长度为什么是 2 的幂次方？</li><li>HashMap 的扩容方式？</li></ul><p>这些问题只有通过源码才能得出比较准确的回答，对吧？</p><p>有个同学说过一句话，给我的印象特别深刻，就是“有啥解决不了的？只要你肯阅读源码。”羊哥出过一个视频，详细地介绍了如何阅读 JDK 源码，推荐给大家。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/yitiaolong-130bcb8a-38bb-448f-8dc1-4e2af22153d2.png" alt=""></p><blockquote><p>视频地址：<a href="https://www.bilibili.com/video/BV1V7411U78L" target="_blank" rel="noopener noreferrer">https://www.bilibili.com/video/BV1V7411U78L<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><h3 id="_4-操作系统、计算机组成原理和计算机网络" tabindex="-1"><a class="header-anchor" href="#_4-操作系统、计算机组成原理和计算机网络" aria-hidden="true">#</a> <strong>4）操作系统、计算机组成原理和计算机网络</strong></h3><p>这三门课的重要性就不用我多说了，如果有时间有精力，推荐按照下面的路线去学习。</p><p>推荐哈工大的《操作系统》实验课，包括操作系统基础篇、操作系统之进程与线程、操作系统之内存管理、操作系统之外设与文件系统</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/yitiaolong-f5e91f0d-4b30-4693-beab-b879bac237b4.png" alt=""></p><blockquote><p>视频地址：<a href="https://www.bilibili.com/video/BV1js411b7vg" target="_blank" rel="noopener noreferrer">https://www.bilibili.com/video/BV1js411b7vg<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>如果想深入学习计算机组成原理的话，推荐北京大学的《计算机组成》公开课，整体评价非常高。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/yitiaolong-6cc5a0d4-7a06-4aca-a9b0-2e8b270d36ba.png" alt=""></p><blockquote><p>视频地址：<a href="https://www.coursera.org/learn/jisuanji-zucheng" target="_blank" rel="noopener noreferrer">https://www.coursera.org/learn/jisuanji-zucheng<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>计算机网络方面的视频我推荐湖科大教书匠的《计算机网络微课堂》，制作得非常用心，是一部不可多得的佳作。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/yitiaolong-0686fbbf-723e-4a0b-8082-3b3577050758.png" alt=""></p><blockquote><p>视频地址：<a href="https://www.bilibili.com/video/BV1c4411d7jb" target="_blank" rel="noopener noreferrer">https://www.bilibili.com/video/BV1c4411d7jb<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><h3 id="_5-项目管理与架构" tabindex="-1"><a class="header-anchor" href="#_5-项目管理与架构" aria-hidden="true">#</a> 5）项目管理与架构</h3><p>实现一个软件系统的过程，不仅只有编码，还涉及到项目安排，团队协调等一系列非技术因素，如果想从一名程序员走向管理岗，成为 team leader 或者开发经理，软件工程方面的知识就必须得跟得上。</p><p>推荐三本书：《构建之法》、《人月神话》和《人件》，虽然有了岁月的痕迹，但依然值得深读。当然，关于软件工程，最好的学习方法是观察，观察你所在的团队是如何处理工程问题的，然后思考，最终形成自己的方法观。</p><p>要想写出一个好而美的程序，需要经过三个阶段。</p><p>第一阶段，<strong>有扎实的基本功</strong>，简单点说，就是要做到语法熟练、框架熟练，成为一名能够完成开发任务的“码农”。</p><p>第二阶段，从“码农”到“工程师”，在局部上，不仅要能够实现功能，还能关注功能之外的维度，比如健壮性、低耦合、可扩展等指标。</p><p>第三阶段，从“工程师”到“架构师”，不仅在局部上追求一个模块的好坏，而且还要从整个系统层面去掌控，合理安排资源的优先级，保证整个系统不会出现腐败等等。</p><p>要想成为一名优秀的架构师，除了自身的努力，也需要一点点运气，但靠读书可能不够，但这些经典书籍还是要阅读的，能给日常的工作带来巨大的帮助。</p><ul><li>《代码大全》</li><li>《重构：改善既有代码的设计》</li><li>《设计原本》</li><li>《大型网站技术架构核心原理与案例分析》</li></ul><h2 id="最后" tabindex="-1"><a class="header-anchor" href="#最后" aria-hidden="true">#</a> 最后</h2><p>学习的过程，就好像登山一样，大概有 80% 的人在这个过程中会掉队。那么请相信我，只要目标明确，努力加上坚持，再加上一点点好运气，你就能登顶！</p><p>最后说一句哈，大家学习 Java，是为了什么，我想大多数不是为了兴趣，是吧？是为了找工作，那么终极的一步，我们需要在找工作之前刷一波面试题，然后找工作的机会也会提升很多。Java 程序员进阶之路上也为大家精心准备了面渣逆袭篇。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/yitiaolong-314e94ce-aa9d-4f09-831b-d1395c4fc07a.png" alt=""></p><p>通过上面这幅图就能感受得到，非常全面，非常精彩。</p><blockquote><p>学习地址：<a href="/sidebar/sanfene/nixi">面渣逆袭</a></p></blockquote><p>衷心的希望，大家都能在学习 Java 的这条路上快乐一些，纯粹一些，少听少看一些那些焦虑文，什么 35 岁，什么学历歧视，沉下心来，多学习一点知识，让自己变强一点，比什么都好！</p><p>另外，需要 Java 学习资料的话，可以直接戳我整理的这个 GitHub/码云仓库——📚Java程序员必读书单整理，附下载地址，助力每一个Java程序员构建属于自己的知识体系。包括但不限于Java、设计模式、计算机网络、操作系统、数据库、数据结构与算法、大数据、架构、面试等等。</p><ul><li>GitHub 地址：<a href="https://github.com/itwanger/JavaBooks" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/JavaBooks<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li>码云地址：<a href="https://gitee.com/itwanger/JavaBooks" target="_blank" rel="noopener noreferrer">https://gitee.com/itwanger/JavaBooks<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul><p>给大家截图展示一下里面都有哪些优质的 PDF：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/java-books.jpg" alt=""></p><p>一家之言，必然有不尽善尽美的地方，但只要能对大家的学习有些许帮助，我也就很满足了！</p><p><strong>这么硬核，别忘记点赞鼓励下哟，如果你身边也有学习 Java 的小伙伴，可以把这篇文章分享给他</strong>~</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/xuexiluxian/java/yitiaolong.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 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href="/xuexiluxian/algorithm.html" class="nav-link sidebar-link sidebar-page" aria-label="算法和数据结构学习路线"><!---->算法和数据结构学习路线<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Java学习路线一条龙版（建议收藏:+1:）</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月29日</span><meta property="datePublished" content="2022-03-29T01:56:53.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>学习路线</li><meta property="articleSection" content="学习路线"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>Java</li></ul><meta property="keywords" content="Java"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 19 分钟</span><meta property="timeRequired" content="PT19M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/java/yitiaolong.html#学习java之前可以先学一下c语言" class="router-link-active router-link-exact-active toc-link level2">学习Java之前可以先学一下C语言</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/java/yitiaolong.html#学习java之前要安装的软件" class="router-link-active router-link-exact-active toc-link level2">学习Java之前要安装的软件</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/java/yitiaolong.html#java-学习的重点是什么" class="router-link-active router-link-exact-active toc-link level2">Java 学习的重点是什么</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/java/yitiaolong.html#哪些java知识不需要再学了" class="router-link-active router-link-exact-active toc-link level2">哪些Java知识不需要再学了</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/java/yitiaolong.html#学习java还需要补充哪些知识" class="router-link-active router-link-exact-active toc-link level2">学习Java还需要补充哪些知识</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/java/yitiaolong.html#_1-数据结构与算法" class="router-link-active router-link-exact-active toc-link level3">1）数据结构与算法</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/java/yitiaolong.html#_2-设计模式" class="router-link-active router-link-exact-active toc-link level3">2）设计模式</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/java/yitiaolong.html#_3-jdk源码" class="router-link-active router-link-exact-active toc-link level3">3）JDK源码</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/java/yitiaolong.html#_4-操作系统、计算机组成原理和计算机网络" class="router-link-active router-link-exact-active toc-link level3">4）操作系统、计算机组成原理和计算机网络</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/java/yitiaolong.html#_5-项目管理与架构" class="router-link-active router-link-exact-active toc-link level3">5）项目管理与架构</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/java/yitiaolong.html#最后" class="router-link-active router-link-exact-active toc-link level2">最后</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><p>虽然我是科班出身，但说实话，十多年走过来，无论是 Java 语言本身，还是它配套的工具和框架都发生了巨大的变化。我自己也是一路学习新的知识，一路丢掉废旧的知识。</p><p>现在回头来看，发现自己也走了不少弯路，浪费了不少时间，真的是既遗憾又叹息！</p><p>关注我的读者当中应该有很大一部分是 Java 初学者，因为是初学，所以面临着巨大的压力，不能付出太高的试错成本。而应该寻找一条更高效的学习路线和一套行之有效的学习方法，否则一不小心，很可能会前功尽弃。</p><p>但好在 Java 的学习资料非常丰富，只要我们稍微用心去整理下，就能找出一条高效的学习路径。过去这两年里，我不断地整理自己的思路，分享了不少关于 Java 方面的文章，但都过于分散，借这个机会，我打算重新梳理一遍，希望能对大家的学习有所帮助。</p><h2 id="学习java之前可以先学一下c语言" tabindex="-1"><a class="header-anchor" href="#学习java之前可以先学一下c语言" aria-hidden="true">#</a> 学习Java之前可以先学一下C语言</h2><p>对于科班的同学来说，我建议在学习 Java 这门编程语言之前，学一下 C 语言。我上大学那会，教材用的是《Java 编程思想》，但说真的，这本书对初学者并不友好。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/yitiaolong-d5e5b52c-1744-468c-ab9c-f77c24415394.jpg" alt=""></p><p>编程语言都是相通的，C语言作为 Java 语言的母胎，<strong>还是非常值得科班去学习一下打打基础的</strong>。其实对于我们程序员来说，学的是计算机科学，而不是编程语言，语言只是工具，没有优劣。像我，就学过 Java、C 语言、Ruby、JavaScript 等等这些编程语言，他们之间确实有很多相似之处。如果学过 JavaScript，能很容易搞懂 Java 的 Lambda 表达式。</p><p>C 语言的特殊性就在于它可能是唯一一门最适合来学习一系列计算机基础的媒介，比如 Linux 操作系统，就是用 C 语言重构的；比如计算机网络，里面有很多网络协议，有不同的 header 定义，这些字段用 C 语言的 union 和 struct 来操作非常便捷。Java 中虽然剔除了指针这种烦人的东西，但说白了，引用其实和指针差不多，理解了 C 语言中的指针，就能很好的理解 Java 中的引用。</p><p>当然了，由于 C 语言的抽象程度更高，学起来也需要花费一番功夫。对于科班的初学者来说，我推荐翁恺教授的 C 语言程序设计。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/yitiaolong-82aefde9-8a3f-4f28-aad5-02e39a6b9d4b.png" alt=""></p><blockquote><p>B 站地址：<a href="https://www.bilibili.com/video/BV19W411B7w1" target="_blank" rel="noopener noreferrer">https://www.bilibili.com/video/BV19W411B7w1<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>喜欢看书的同学我只推荐一本，《<strong>阮一峰老师的 C语言入门教程</strong>》，我第一时间就拜读了一遍，受益匪浅！可以说目前我见到的最好的 C语言入门教程了，没有之一！</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/yitiaolong-3507eb06-8424-4b8e-b20d-046268508c9d.png" alt=""></p><p>我第一时间就整理了一份 PDF 版的，需要的小伙伴可以长按识别/扫描下方二维码，关注后回复 「<strong>阮一峰</strong>」 下载这份 PDF 吧：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongzhonghao.png" alt="扫码关注后回复「阮一峰」关键字"></p><p>在学习的过程中切记一点，就是一定要多练多练多练，这一点不仅适合学习 C语言，也适合学习 Java 语言。有句话说得好呀，<strong>看懂了+上万行代码=学会了</strong>。无论是看视频学习，还是看书学习，最怕的就是眼高手低，以为自己看懂了，实际上呢，离学会了还差上万行代码。</p><p>对于非科班的同学来说，如果时间比较紧迫的话，可以直接上手 Java，我觉得只要学习资料选的好，也是完全没有问题的。</p><h2 id="学习java之前要安装的软件" tabindex="-1"><a class="header-anchor" href="#学习java之前要安装的软件" aria-hidden="true">#</a> 学习Java之前要安装的软件</h2><p>工欲善其事必先利其器，战斗之前我们要先配备好武器。</p><p>JDK 是 Java Development ToolKit 的简称，也就是 Java 开发工具包。JDK 是整个 Java 的核心，包括 Java 运行环境（Java Runtime Envirnment，简称 JRE），Java 工具（比如 javac、java、javap 等等），以及 Java 基础类库（比如 rt.jar），学习 Java 之前必须要安装。</p><p>已经 2022 年了，真没必要在记事本上敲代码了。反正我遇到过太多的课程，包括我上大学时候的老师，都一而再再而三的强调，一定要用记事本敲出来第一个程序，并且在命令行里成功运行起来。</p><p>这么多年下来，我觉得这个建议真的是糟糕极了。记事本和命令行，怎么能让初学者上手呢？最起码也得是个老江湖才行啊！当年我就差点被记事本和命令行劝退。</p><p>Intellij IDEA，不用说，是编写 Java 程序的最佳 IDE，初学者选择社区版就完全够用了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/yitiaolong-3fb56f9d-942a-4439-8bab-0f19bd59ef58.png" alt=""></p><p>初次使用的话，建议阅读一下《IntelliJ IDEA 简体中文专题教程》，GitHub 上已开源。</p><blockquote><p>地址：<a href="https://github.com/judasn/IntelliJ-IDEA-Tutorial" target="_blank" rel="noopener noreferrer">https://github.com/judasn/IntelliJ-IDEA-Tutorial<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>Maven 是一个项目管理和自动化构建工具，基于项目对象模型（POM）的概念，可以管理项目的构建、报告以及文档。作为 Apache 组织中的一个颇为成功的开源项目，Maven 主要服务于基于 Java 的项目构建、依赖管理和项目信息管理。有了 Maven 以后，第三方类库管理起来就舒服多了。</p><p>安装和配置教程直接看我写过的这篇文章<a href="https://mp.weixin.qq.com/s/3umZOaI4l0EIZ5RgtEDchw" target="_blank" rel="noopener noreferrer">10分钟，掌握项目构建神器Maven<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>就好了。</p><p>另外，我推荐大家使用 GitHub/码云来作为私有的代码仓库，特别方便，免费还可以云同步。还不太熟悉<a href="https://tobebetterjavaer.com/git/git-qiyuan.html" target="_blank" rel="noopener noreferrer">Git 命令<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>的话，可以下载<a href="https://desktop.github.com/" target="_blank" rel="noopener noreferrer">GitHub 桌面版<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>来傻瓜式地操作。</p><p>这一套软件安装完成后，基本上开发 Java 的必备工具就齐活了。接下来，就可以放心大胆的进入 Java 的世界了。</p><h2 id="java-学习的重点是什么" tabindex="-1"><a class="header-anchor" href="#java-学习的重点是什么" aria-hidden="true">#</a> Java 学习的重点是什么</h2><p>“冰冻三尺非一日之寒”，要想把 Java 学好，还是需要花费一番功夫的。Java 语言的知识点非常多，而我们又时间紧迫，意味着只能挑重点、挑实用，不能面面俱到，<strong>一些不常用的知识点可以直接 pass 掉</strong>。</p><p>我这里给大家贴一张《Java 程序员进阶之路》的导航地图，大类分为 Java 核心、Java 企业级开发、数据库、计算机基础、求职面试、学习资源等，基本上你要的 Java 学习资源，这里都有，没有的，后面我也会补充上。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/yitiaolong-c80191bf-ab08-4a28-898f-ea7ffff3f966.png" alt=""></p><p>Java 是一门面向对象的编程语言，所以三大特性：封装、继承、多态是必须要掌握的，然后是异常处理、IO、集合、并发编程和 Java 虚拟机。只要这些内容掌握了，可以说 Java 语言本身的核心知识就全部掌握了。</p><p>这些知识该怎么学呢？当然是直接上二哥的 Java 程序员进阶之路了，内容非常的全面和硬核，截图给大家鉴赏一下。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/yitiaolong-a5436c4a-6464-4065-ae0d-50755c4184df.png" alt=""></p><p>记住我们的网址：</p><blockquote><p><a href="https://tobebetterjavaer.com/home.html#java%E6%A0%B8%E5%BF%83" target="_blank" rel="noopener noreferrer">https://tobebetterjavaer.com/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>这其中的难点是并发编程和 JVM，显然这两部分的内容学起来并不容易，但却最能考验一名 Java 后端工程师的功底了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/yitiaolong-dac18663-f729-41d6-8253-2473b2174b9e.png" alt="Java 并发编程核心知识点"></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/yitiaolong-35df7e61-99c1-4efc-8f9f-702cc0f08904.png" alt="JVM 核心知识点"></p><p>因为是自学，所以强烈建议大家把教程上的代码都敲一遍，尤其是在初学阶段。由于不像工作后，有大量的项目可以实践，所以不能得到及时的反馈，记笔记就显得特别的重要。另外，一定要分门别类保存好自己的 demo，以便以后可以快速得找得到，尤其是一些小套路，会很有用，积累得多了，可能就变成了自己的工具库。</p><p>一定要善待自己写过的那些小 demo，尤其是那些已经调通的，千万不要扔，没准哪一天能帮上大忙。以我的经验，在学习的过程中，尽管某些知识点在当时理解的多么透彻，但只要时间一长，或者换个开发环境，可能就完蛋，明明感觉代码是一样的，但就是运行不起来。如果手头恰好有这么一个 demo，打开参考一下，甚至拷贝过来试一下，问题就会迎刃而解。</p><p>大部分 Java 程序员都要从事 JavaWeb 的相关开发工作，要开发 JavaWeb，自然就离不开 Spring 的系列框架（之前是 SSM，现在是 Spring Boot）。 但不管怎么演变，Spring 的核心概念仍然是 IOC 和 AOP，也就是控制反转和面向切面编程。</p><p>关于 Spring Boot 的实战内容，二哥也在紧锣密鼓的准备<a href="https://github.com/itwanger/coding-more" target="_blank" rel="noopener noreferrer">编程喵<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>这个实战项目，可以先给大家展示一下后端用到的技术栈，都是非常主流的技术。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhishixingqiu/readme-8.png" alt=""></p><p>如果说你已经掌握了 Spring、SpringMVC、MyBatis、Spring Boot 等内容，就有能力进行一些真正有用的应用项目开发了，比如说学生管理系统、商城系统、博客系统、秒杀系统等等。</p><p>当然了，要做完整的 Java Web 项目，前端的一些知识肯定是少不了的，但不能放太多心思，界面丑点无所谓，重点在 Java 后端上面。</p><p>学习编程就是一个由混沌到有序的过程，如果碰到了理解不了的知识，不要怀疑自己适不适合编程，跳过就行了，这是再正常不过的事了——必须抱有一颗越挫越勇的心。</p><h2 id="哪些java知识不需要再学了" tabindex="-1"><a class="header-anchor" href="#哪些java知识不需要再学了" aria-hidden="true">#</a> 哪些Java知识不需要再学了</h2><p>张无忌在学太极拳的时候，太师父张三丰就对他喊，一定要把之前所学习的武功全部忘掉，<strong>忘得越多就会学得越快</strong>。同样的，自学 Java 的时候一定要先知道哪些 Java 知识不需要再学了，毕竟技术的更新迭代就好像火箭一样快，Java 的一些知识点早已经过时了。如果不懂得断舍离，那学起来就不免太痛苦了。</p><p>1）AWT 和 Swing</p><p>已经 2022 年了，谁还会用 AWT 和 Swing 去开发桌面应用呢？学好后端开发即可，现在是移动互联网时代，基本上都是手机APP、小程序、Web 网页来做前端了，可以把学习的重心放到 Spring Boot、Spring Cloud、Netty、Dubbo、Zookeeper、Mysql上。</p><p>2）Applet</p><p>作为网页插件技术，Applet 压根就没流行起来。</p><p>3）XML</p><p>XML 还没有被淘汰，应用的地方还有不少，比如说 Maven 的 pom.xml 文件里就还在用。但是作为一种数据传输格式，它正在被 JSON 替代。至于复杂的 XML 操作 API（例如 XPath）就完全没必要学习了，如果真的用到了，再去补也不迟。</p><p>4）JDBC</p><p>我个人不建议再学习偏底层的 JDBC 了，尤其是对于时间宝贵的自学程序员来说。与其花这点时间，不如把精力投入到 MyBatis 的学习上。当然了，如果真的有时间，真的想打基础，研究一下也无可厚非。</p><p>5）Struts</p><p>Struts 是早年一个优秀的 MVC 框架，单从技术的角度来看，还是蛮不错的。但是自从有了 SpringMVC 后，Struts 就被拍死在沙滩上了。</p><p>6）Hibernate</p><p>在我刚参加工作那会（2010 年的时候），持久层框架用的正是 Hibernate。但时过境迁，Hibernate 太重量级了，学习成本太高，取而代之的是轻量级的 MyBatis。现在有一种说法就是这种对象关系映射太过死板了，不如直接写 SQL 来得灵活，像我很喜欢的一个轻量级框架 JFinal 就更偏重于在 Java 代码中写 SQL，而不像 MyBatis 和 Hibernate 在 xml 文件中写。</p><p>7）JSP</p><p>JSP 在实际开发中，主要是作为 MVC 模型中的V（View）层出现的。它本来是为 Java 后端程序员开发前端界面而生的，但随着技术的发展，前后端分离的流行，JSP 的生命周期已经到头了。</p><p>8）Servlet</p><p>虽然 SpringMVC 的底层是以 Servlet 为基础的，是 JavaWeb 容器的基石，但 Servlet 的确已经过时了。如果后面有空余时间的话，想钻的话可以钻一下，对服务器端接收请求数据和向前端发送响应数据时会有一些帮助。</p><p>我这样的说法可能不够可观，不够顾及底层知识，但自学的时间成本还是要适当控制一下。<strong>总之，我们应该省下更多的时间去学习前面小节提到的重点知识</strong>！</p><h2 id="学习java还需要补充哪些知识" tabindex="-1"><a class="header-anchor" href="#学习java还需要补充哪些知识" aria-hidden="true">#</a> 学习Java还需要补充哪些知识</h2><h3 id="_1-数据结构与算法" tabindex="-1"><a class="header-anchor" href="#_1-数据结构与算法" aria-hidden="true">#</a> <strong>1）数据结构与算法</strong></h3><p>毫无疑问，数据结构对一名程序员来说非常重要，还是那句话<code>程序=数据结构+算法</code>，这种说法无论放在什么时候都是成立的。</p><p>大部分的<strong>数据结构</strong>课程，关注的重点都在如何从数学上实现一个数据结构，但在实际开发中，大部分主流语言都已经内置了常见的数据结构，比如说 Java。也就是说，对于大部分程序员来说，实际开发中，很难有需求要从零开始实现一个数据结构。因此我们只需要做到下面几点。</p><p>1、熟悉常见数据结构的概念，比如说数组、堆栈、链表、哈希表等。</p><p>2、了解常用数据结构之间的差异，比如说 <a href="https://tobebetterjavaer.com/collection/list-war-2.html" target="_blank" rel="noopener noreferrer">ArrayList 和 LinkedList<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>。</p><p>3、关注常用数据结构的外围算法，比如说如何对 List 和 Map 进行查找。</p><p>4、关注数据结构使用中容易出错的地方，比如说线程是否安全等。</p><p>B 站上浙江大学的一个数据结构课非常不错，很系统很经典。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/yitiaolong-e2812c94-5945-41ad-adcd-4dbb02fae8d5.png" alt=""></p><blockquote><p>视频地址：<a href="https://www.bilibili.com/video/BV1JW411i731" target="_blank" rel="noopener noreferrer">https://www.bilibili.com/video/BV1JW411i731<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>以我接触的领域来说，大部分普通的业务系统都不会涉及到太复杂的<strong>算法</strong>，因此我没有在算法上投入过多时间。但如果你将来要从事一些特殊的领域，如果算法跟不上，可以说是“寸步难行”，比如说图形处理领域，无论是图像的变化还是增强，无一例外都要用到矩阵变换，因此就必然涉及到线性代数的内容，再往深处学的话，必然会牵扯出更多的知识。</p><p>所以学习算法要视情况而定，如果想走算法岗，那么《算法第4版》、《算法导论》、《数学之美》、《编程珠玑》、《剑指offer》这些书都要耐着性子啃一啃。</p><h3 id="_2-设计模式" tabindex="-1"><a class="header-anchor" href="#_2-设计模式" aria-hidden="true">#</a> <strong>2）设计模式</strong></h3><p>我认为<strong>设计模式</strong>是初中级程序员迈向高级程序员的必经之路。有不少程序员，前期冲劲十足，但后继乏力，都是吃了设计模式的亏。在工作的前几年，大部分程序员都处于熟悉编程语言的阶段，也就是处于“技”的阶段，随后就要进入“术”的阶段了。在编程领域，“术”的典型代表就是“设计模式”。</p><p>学习设计模式的话，推荐好朋友小傅哥的《重学 Java 设计模式》。我之前推荐的 Refactoring Guru 网站，也非常的 nice。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/yitiaolong-3b9ab6b9-67f2-4810-bb39-9e1f48ffe3da.png" alt=""></p><blockquote><p>在线阅读地址：<a href="https://refactoring.guru" target="_blank" rel="noopener noreferrer">https://refactoring.guru<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>需要离线版的小伙伴请长按识别/扫描下方的二维码关注作者的原创公众号「<strong>沉默王二</strong>」回复关键字「<strong>设计模式</strong>」就可以拉取到了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongzhonghao.png" alt="扫码关注后回复「设计模式」关键字"></p><h3 id="_3-jdk源码" tabindex="-1"><a class="header-anchor" href="#_3-jdk源码" aria-hidden="true">#</a> <strong>3）JDK源码</strong></h3><p>面试的时候，面试官都特别喜欢问一些源码方面的知识，比如说 HashMap 的一些经典问题：</p><ul><li>加载因子为什么是 0.75？</li><li>为什么链表改为红黑树的阈值是 8?</li><li>HashMap的底层数据结构是什么？</li><li>解决hash冲突的办法有哪些？</li><li>HashMap数组的长度为什么是 2 的幂次方？</li><li>HashMap 的扩容方式？</li></ul><p>这些问题只有通过源码才能得出比较准确的回答，对吧？</p><p>有个同学说过一句话，给我的印象特别深刻，就是“有啥解决不了的？只要你肯阅读源码。”羊哥出过一个视频，详细地介绍了如何阅读 JDK 源码，推荐给大家。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/yitiaolong-130bcb8a-38bb-448f-8dc1-4e2af22153d2.png" alt=""></p><blockquote><p>视频地址：<a href="https://www.bilibili.com/video/BV1V7411U78L" target="_blank" rel="noopener noreferrer">https://www.bilibili.com/video/BV1V7411U78L<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><h3 id="_4-操作系统、计算机组成原理和计算机网络" tabindex="-1"><a class="header-anchor" href="#_4-操作系统、计算机组成原理和计算机网络" aria-hidden="true">#</a> <strong>4）操作系统、计算机组成原理和计算机网络</strong></h3><p>这三门课的重要性就不用我多说了，如果有时间有精力，推荐按照下面的路线去学习。</p><p>推荐哈工大的《操作系统》实验课，包括操作系统基础篇、操作系统之进程与线程、操作系统之内存管理、操作系统之外设与文件系统</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/yitiaolong-f5e91f0d-4b30-4693-beab-b879bac237b4.png" alt=""></p><blockquote><p>视频地址：<a href="https://www.bilibili.com/video/BV1js411b7vg" target="_blank" rel="noopener noreferrer">https://www.bilibili.com/video/BV1js411b7vg<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>如果想深入学习计算机组成原理的话，推荐北京大学的《计算机组成》公开课，整体评价非常高。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/yitiaolong-6cc5a0d4-7a06-4aca-a9b0-2e8b270d36ba.png" alt=""></p><blockquote><p>视频地址：<a href="https://www.coursera.org/learn/jisuanji-zucheng" target="_blank" rel="noopener noreferrer">https://www.coursera.org/learn/jisuanji-zucheng<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>计算机网络方面的视频我推荐湖科大教书匠的《计算机网络微课堂》，制作得非常用心，是一部不可多得的佳作。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/yitiaolong-0686fbbf-723e-4a0b-8082-3b3577050758.png" alt=""></p><blockquote><p>视频地址：<a href="https://www.bilibili.com/video/BV1c4411d7jb" target="_blank" rel="noopener noreferrer">https://www.bilibili.com/video/BV1c4411d7jb<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><h3 id="_5-项目管理与架构" tabindex="-1"><a class="header-anchor" href="#_5-项目管理与架构" aria-hidden="true">#</a> 5）项目管理与架构</h3><p>实现一个软件系统的过程，不仅只有编码，还涉及到项目安排，团队协调等一系列非技术因素，如果想从一名程序员走向管理岗，成为 team leader 或者开发经理，软件工程方面的知识就必须得跟得上。</p><p>推荐三本书：《构建之法》、《人月神话》和《人件》，虽然有了岁月的痕迹，但依然值得深读。当然，关于软件工程，最好的学习方法是观察，观察你所在的团队是如何处理工程问题的，然后思考，最终形成自己的方法观。</p><p>要想写出一个好而美的程序，需要经过三个阶段。</p><p>第一阶段，<strong>有扎实的基本功</strong>，简单点说，就是要做到语法熟练、框架熟练，成为一名能够完成开发任务的“码农”。</p><p>第二阶段，从“码农”到“工程师”，在局部上，不仅要能够实现功能，还能关注功能之外的维度，比如健壮性、低耦合、可扩展等指标。</p><p>第三阶段，从“工程师”到“架构师”，不仅在局部上追求一个模块的好坏，而且还要从整个系统层面去掌控，合理安排资源的优先级，保证整个系统不会出现腐败等等。</p><p>要想成为一名优秀的架构师，除了自身的努力，也需要一点点运气，但靠读书可能不够，但这些经典书籍还是要阅读的，能给日常的工作带来巨大的帮助。</p><ul><li>《代码大全》</li><li>《重构：改善既有代码的设计》</li><li>《设计原本》</li><li>《大型网站技术架构核心原理与案例分析》</li></ul><h2 id="最后" tabindex="-1"><a class="header-anchor" href="#最后" aria-hidden="true">#</a> 最后</h2><p>学习的过程，就好像登山一样，大概有 80% 的人在这个过程中会掉队。那么请相信我，只要目标明确，努力加上坚持，再加上一点点好运气，你就能登顶！</p><p>最后说一句哈，大家学习 Java，是为了什么，我想大多数不是为了兴趣，是吧？是为了找工作，那么终极的一步，我们需要在找工作之前刷一波面试题，然后找工作的机会也会提升很多。Java 程序员进阶之路上也为大家精心准备了面渣逆袭篇。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/yitiaolong-314e94ce-aa9d-4f09-831b-d1395c4fc07a.png" alt=""></p><p>通过上面这幅图就能感受得到，非常全面，非常精彩。</p><blockquote><p>学习地址：<a href="/sidebar/sanfene/nixi">面渣逆袭</a></p></blockquote><p>衷心的希望，大家都能在学习 Java 的这条路上快乐一些，纯粹一些，少听少看一些那些焦虑文，什么 35 岁，什么学历歧视，沉下心来，多学习一点知识，让自己变强一点，比什么都好！</p><p>另外，需要 Java 学习资料的话，可以直接戳我整理的这个 GitHub/码云仓库——📚Java程序员必读书单整理，附下载地址，助力每一个Java程序员构建属于自己的知识体系。包括但不限于Java、设计模式、计算机网络、操作系统、数据库、数据结构与算法、大数据、架构、面试等等。</p><ul><li>GitHub 地址：<a href="https://github.com/itwanger/JavaBooks" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/JavaBooks<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li>码云地址：<a href="https://gitee.com/itwanger/JavaBooks" target="_blank" rel="noopener noreferrer">https://gitee.com/itwanger/JavaBooks<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul><p>给大家截图展示一下里面都有哪些优质的 PDF：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/java/java-books.jpg" alt=""></p><p>一家之言，必然有不尽善尽美的地方，但只要能对大家的学习有些许帮助，我也就很满足了！</p><p><strong>这么硬核，别忘记点赞鼓励下哟，如果你身边也有学习 Java 的小伙伴，可以把这篇文章分享给他</strong>~</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/xuexiluxian/java/yitiaolong.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 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class="page-title"><h1><!---->蓝桥杯学习路线（建议收藏👍）</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" 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pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>学习路线</li><meta property="articleSection" content="学习路线"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag8" role>蓝桥杯</li></ul><meta property="keywords" content="蓝桥杯"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 10 分钟</span><meta property="timeRequired" content="PT10M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/lanqiaobei.html#🌞一、蓝桥杯到底是什么" class="router-link-active router-link-exact-active toc-link level3">🌞一、蓝桥杯到底是什么?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/lanqiaobei.html#🌞二、我们为什么要参加蓝桥杯" class="router-link-active router-link-exact-active toc-link level3">🌞二、我们为什么要参加蓝桥杯?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/lanqiaobei.html#🌞三、现在0基础参加还来得及吗" class="router-link-active router-link-exact-active toc-link level3">🌞三、现在0基础参加还来得及吗?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/lanqiaobei.html#🌞四、蓝桥杯考的是什么-难吗-和acm有什么区别" class="router-link-active router-link-exact-active toc-link level3">🌞四、蓝桥杯考的是什么?难吗？和ACM有什么区别？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/lanqiaobei.html#🌞五、备战蓝桥的学习路线和刷题网站" class="router-link-active router-link-exact-active toc-link level3">🌞五、备战蓝桥的学习路线和刷题网站</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/lanqiaobei.html#🌞六、如何正确的刷题" class="router-link-active router-link-exact-active toc-link level3">🌞六、如何正确的刷题？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/lanqiaobei.html#🌞七、蓝桥年真题资源-配套考试环境" class="router-link-active router-link-exact-active toc-link level3">🌞七、蓝桥年真题资源+配套考试环境</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="蓝桥杯学习路线-建议收藏" tabindex="-1"><a class="header-anchor" href="#蓝桥杯学习路线-建议收藏" aria-hidden="true">#</a> 蓝桥杯学习路线（建议收藏👍）</h1><ul><li>蓝桥杯到底是啥？</li><li>蓝桥杯适合我参加吗？</li><li>我现在零基础还来得急吗？</li><li>我要是陪跑了报名费三百块岂不是交智商税了？</li><li>就算报名了我该如何去训练呢?</li></ul><p>话不多说，我们挨个解答（结尾有免费的真题和解析以及配套的考试环境搭建，迫不及待地小伙伴可以直接长按识别/扫描下方二维码回复关键字「<strong>蓝桥杯</strong>」获取）</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongzhonghao.png" alt="扫码关注后回复「蓝桥杯」关键字"></p><h3 id="🌞一、蓝桥杯到底是什么" tabindex="-1"><a class="header-anchor" href="#🌞一、蓝桥杯到底是什么" aria-hidden="true">#</a> 🌞一、蓝桥杯到底是什么?</h3><p><strong>蓝桥杯全国软件和信息技术专业人才大赛，是由工业和信息化部人才交流中心举办的全国性IT学科赛事</strong>。全国1200余所高校参赛，累计参赛人数超过40万人。蓝桥杯大赛连续两年被列入中国高等教育学会发布的“全国普通高校学科竞赛排行榜”，是高校教育教学改革和创新人才培养的重要竞赛项目。对大学生综合评测，奖学金评定，升学考研都有一定助益。</p><p>蓝桥杯大赛共包括三个竞赛组别：</p><ul><li>个人赛-软件类</li><li>个人赛-电子类</li><li>视觉艺术大赛</li></ul><p>其中个人赛-软件类的比赛科目包括C/C++程序设计、Java软件开发、Python程序设计。</p><p>附上蓝桥杯官网地址：蓝桥杯官网（个人报名通道即将开启，看完这篇文章赶快去报名吧）</p><blockquote><p><a href="https://dasai.lanqiao.cn/" target="_blank" rel="noopener noreferrer">https://dasai.lanqiao.cn/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><h3 id="🌞二、我们为什么要参加蓝桥杯" tabindex="-1"><a class="header-anchor" href="#🌞二、我们为什么要参加蓝桥杯" aria-hidden="true">#</a> 🌞二、我们为什么要参加蓝桥杯?</h3><p><strong>🍋第一、含金量高，被绝大多数高校和企业认可</strong></p><p>其实从上面蓝桥杯的简介我们就能看出来，蓝桥杯在我国高校中的it比赛中的知名度非常高，即使是清华北大和顶尖985的高校学子参加的人也是络绎不绝。</p><p>只要你获得好成绩，甚至能当场获得一些大厂的青睐，如像百度、方正等大公司。 即使你没有获得非常优秀的成绩，它同样对你的大学生综合评测，奖学金评定，升学考研都有一定助益。可以说是作为it大学生不可或缺的一项比赛。</p><p><strong>🍋第二、分组比赛，防止被&quot;屠杀&quot;</strong></p><p>这是蓝桥杯最有特色也是它最贴心的地方，蓝桥杯的赛道分为：</p><ul><li>研究生组，研究生只能参加这个。</li><li>大学A组，重点本科参加的组别，包括所有985、211的学校。</li><li>大学B组，普通本科院校，也是参赛人数几乎最多的赛道。</li><li>大学C组，高职高专组。</li></ul><p>高组别的不能报考低组别的，但是低组别可以越级报考高组别，比如你是普通本科你也可以报考大学A组（只要你有自信）。</p><p>这样的分组有什么好处呢？</p><p>它将实力相近的人群放到一个组别，防止参赛选手实力差距过大，导致奖项全被更好的学校包揽。为每一个高校学子都提供了一个更加公平的竞技平台。</p><p>举个例子：一个B组或C组的参加比赛，发现遇到的都是顶尖985的ACM职业比赛选手来降维打击，那不是被吃的渣都不剩。这样低组别的话学生谁还会想报名呢？</p><p><strong>🍋第三、参赛门槛低，获奖容易</strong></p><p>这一点通过上面大家都可以感受得到，蓝桥杯是所有的高校学子都有参加的赛事。而且即使你不以院校的名义参加，现在也可以以个人的名义参加比赛，只需要缴纳报名费三百元即可。</p><p>有的人一听到这，三百？这么多。别担心，蓝桥杯的比赛基本上只要你肯认真去学习准备，拿个最低的省三等奖是非常容易的，而大部分的院校只要你能拿奖，是都可以报销的。</p><p>当然你要说你光报名不去准备那肯定这三百块是去交智商税了。</p><p>顺带说说蓝桥杯的获奖机制，蓝桥杯分为省赛和国赛。</p><p>省赛排名的前百分之10获得省一等奖，接下来的百分之20为省二等奖，再下来的百分之30省三等奖。</p><p>可以说，只要你的排名在前60%你就可以获奖，你就可以报销报名费了。</p><p>如果你有幸拿了省一等奖，还可以参加国赛，进入国赛后即使你最差也可以拿到一个国家三等奖。可以说蓝桥杯这样的获奖机制，即使是大一大二的学习参加，获奖也是非常容易的。即使大一大二未取得很好的成绩，可有了这次比赛经验，大三大四再去参加就已经比其他选手有着不小的优势了。</p><p><strong>🍋第四、公司对算法的能力要求越来越高</strong></p><p>现在整个it行业的公司无论是大厂还是小厂，无论是校招还是社招，对算法的考差都是必须的。对于大厂来说，你的算法不过关，不好意思我们不要你。对于小厂来说，你的算法不过关，对不起我们不能给你更高的职位和薪资。</p><p>所以在我们准备蓝桥杯的过程学习算法的过程，同时也是为了我们未来就业做准备。可以说，算法能力决定了你的钱途和前途。想要在未来拿个好offer，参加蓝桥杯正是你不可或缺的。</p><h3 id="🌞三、现在0基础参加还来得及吗" tabindex="-1"><a class="header-anchor" href="#🌞三、现在0基础参加还来得及吗" aria-hidden="true">#</a> 🌞三、现在0基础参加还来得及吗?</h3><p>现在参加一点都不晚。</p><p>蓝桥杯现在只是处在报名阶段，它真正比赛的日期要在明年四月份左右。不严格意义的来算，你甚至还有半年的时间去学习和准备。</p><p><strong>任何事情能够坚持半年，都能为一个人带来巨大的蜕变</strong>。只要你每周能拿出一点时间学习算法，持之以恒，正所谓士别三日还将刮目想看，半年的学习，完全能让你成功成为一个算法小将，甚至更加优秀。</p><h3 id="🌞四、蓝桥杯考的是什么-难吗-和acm有什么区别" tabindex="-1"><a class="header-anchor" href="#🌞四、蓝桥杯考的是什么-难吗-和acm有什么区别" aria-hidden="true">#</a> 🌞四、蓝桥杯考的是什么?难吗？和ACM有什么区别？</h3><p>蓝桥杯的省赛有十道题，四个小时的时间。题目有填空题和编程题，填空题只要你的答案正确即可得分，编程题即使你的答案不对，也可以按步骤得分，可以说非常的人性化。</p><p>它不同于ACM的ACM团队赛制，ACM题目是英语的，必须运行的结果正确才可得分。ACM的题目要更加难，考察的更多是人的思维能力，也可以说是天赋，它并不适合大部分人去参加，而且需要付出的时间也更多。</p><p>而蓝桥杯的题目虽然称不上是非常难，但也并非人人都能会的。但你如果肯花一些时间去学习，那它给你的结果也肯定不会让你失望。它的题型比较单一，更多的是考差学习掌握了哪些算法能力。<strong>蓝桥杯的题型更喜欢考暴力、枚举、动规等问题</strong>。</p><h3 id="🌞五、备战蓝桥的学习路线和刷题网站" tabindex="-1"><a class="header-anchor" href="#🌞五、备战蓝桥的学习路线和刷题网站" aria-hidden="true">#</a> 🌞五、备战蓝桥的学习路线和刷题网站</h3><p>如果你是C/C++的选手，那我劝你一定要认真学好所有的基础算法。C和C++都是非常适合用来写算法的语言，所以这个组别的选手大多都是有一定的实力的，如果你想来混可能被吃的渣都不剩。当然其他两组选手也非常多，所以也需要认真去复习，先看看我归纳的学习路线图。</p><p><img src="https://upload-images.jianshu.io/upload_images/1179389-267796e602b75052.png?imageMogr2/auto-orient/strip|imageView2/2/w/1240" alt=""></p><p>不要一下觉得很多，很多都是在学校的课程中学到过的，而且你还有半年的时间，想要掌握这里面的大部分算法完全时间绰绰有余。当然也为大家推荐了一些好的学习算法和数据结构的网站</p><p>力扣（yyds）：</p><blockquote><p><a href="https://leetcode-cn.com/" target="_blank" rel="noopener noreferrer">https://leetcode-cn.com/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>牛客网（同样经典的刷题网站）：</p><blockquote><p><a href="https://www.nowcoder.com/activity/oj?tab=1" target="_blank" rel="noopener noreferrer">https://www.nowcoder.com/activity/oj?tab=1<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>PTA（适合小白）：</p><blockquote><p><a href="https://pintia.cn/" target="_blank" rel="noopener noreferrer">https://pintia.cn/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>VisuAlgo 数据结构和算法动态可视化（学习数据结构的神器）：</p><blockquote><p><a href="https://visualgo.net/zh" target="_blank" rel="noopener noreferrer">https://visualgo.net/zh<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>蓝桥云课（蓝桥杯官方学习网站）：</p><blockquote><p><a href="https://www.lanqiao.cn/" target="_blank" rel="noopener noreferrer">https://www.lanqiao.cn/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>当然别忘记了哔哩哔哩大学，里面也有非常优秀的资源，下面向大家推荐几个我自己学习过的：</p><p>图灵数据结构与算法：</p><p><img src="https://upload-images.jianshu.io/upload_images/1179389-1f0e23da66059bd3.png?imageMogr2/auto-orient/strip|imageView2/2/w/1240" alt=""></p><blockquote><p><a href="https://www.bilibili.com/video/BV1a54y1b74k" target="_blank" rel="noopener noreferrer">https://www.bilibili.com/video/BV1a54y1b74k<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>可能是最好的Java数据结构教程：</p><p><img src="https://upload-images.jianshu.io/upload_images/1179389-589bf36b1ec3191d.png?imageMogr2/auto-orient/strip|imageView2/2/w/1240" alt=""></p><blockquote><p><a href="https://www.bilibili.com/video/BV1iJ411E7xW" target="_blank" rel="noopener noreferrer">https://www.bilibili.com/video/BV1iJ411E7xW<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>还有 C 站上最强的算法大佬，英雄哪里出来。</p><blockquote><p><a href="https://blog.csdn.net/whereisherofrom" target="_blank" rel="noopener noreferrer">https://blog.csdn.net/whereisherofrom<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>大佬的文章讲解了各种从易到难的算法，而且讲的非常透彻。</p><h3 id="🌞六、如何正确的刷题" tabindex="-1"><a class="header-anchor" href="#🌞六、如何正确的刷题" aria-hidden="true">#</a> 🌞六、如何正确的刷题？</h3><p>这里我结合自身刷题的经验和一些博主的推荐向大家推荐一下，如果你是零基础或者基础不好的，每次只是闲着无聊才坐一两题，现在想系统的学习算法。我推荐你先去力扣网站。</p><p><img src="https://img-blog.csdnimg.cn/40f236b195004f738e89a1c6277947ac.png" alt=""></p><p>在这选择难度简单，然后挑一些题解量高，通过率高的题目试试水。这类题目基本比较简单，不会涉及到什么算法，每次提交成功都可以激发你学习算法的兴趣。</p><p>即使做不出来里面也有许多大佬的题解五花八门，让你们一眼看懂他们的神奇思路。有的人总是好高骛远，入门就去学什么贪心动态，一道题看两三个钟头，结果最后题解都看不懂，这是学习算法的大忌。</p><p>等你试水完毕有了一定做题经验后，我推荐你去参加力扣的学习计划专栏，这些都是免费的，从双指针到动规和数据结构都有，可以帮你一步一步帮你训练出优秀的算法能力。</p><p><img src="https://img-blog.csdnimg.cn/3e2c94a9bed44193a6e18c2d6a0df7a6.png" alt=""></p><p><strong>刷题也千万不要忘记归纳总结</strong>！！！</p><p>刷题并不是刷完就过了即可，题目在变化，但题型永远就那么一些。只有归纳出属于自己的一套笔记，才能做题越来越得心应手。将考点相同的算法点总结，再去寻找类似的算法题看能否做出来检验自己，这样才能搞明白自己是否真的学会了这个算法。</p><p>我为大家推荐的是我自己常用的笔记软件语雀，贴上部分我做的笔记，可以直接贴图非常方便。当然还有有道云笔记，Typora等等都非常不错。</p><p><img src="https://img-blog.csdnimg.cn/9881f0d441514f9e9de5d7da3f7aa4e8.png" alt=""></p><h3 id="🌞七、蓝桥年真题资源-配套考试环境" tabindex="-1"><a class="header-anchor" href="#🌞七、蓝桥年真题资源-配套考试环境" aria-hidden="true">#</a> 🌞七、蓝桥年真题资源+配套考试环境</h3><p><img src="https://upload-images.jianshu.io/upload_images/1179389-966a1b1b2b82e154.png?imageMogr2/auto-orient/strip|imageView2/2/w/1240" alt=""></p><p>费了九牛二虎之力，终于搞到了这些关于蓝桥杯的学习资料，如果能认真刷完，想输很难的，想交学费很难的——妥妥地赢回来。</p><p><strong>怎么获取呢？</strong></p><p>由于资料非常容易被河蟹，需要的小伙伴可以长按识别/扫描关注公众号「<strong>沉默王二</strong>」，回复关键字「<strong>蓝桥杯</strong>」即可获取。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongzhonghao.png" alt="扫码关注后回复「蓝桥杯」关键字"></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/xuexiluxian/lanqiaobei.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 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active sidebar-link sidebar-page active" aria-label="蓝桥杯学习路线"><!---->蓝桥杯学习路线<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/xuexiluxian/lanqiaobei.html#🌞一、蓝桥杯到底是什么" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="🌞一、蓝桥杯到底是什么?"><!---->🌞一、蓝桥杯到底是什么?<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/xuexiluxian/lanqiaobei.html#🌞二、我们为什么要参加蓝桥杯" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="🌞二、我们为什么要参加蓝桥杯?"><!---->🌞二、我们为什么要参加蓝桥杯?<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/xuexiluxian/lanqiaobei.html#🌞三、现在0基础参加还来得及吗" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="🌞三、现在0基础参加还来得及吗?"><!---->🌞三、现在0基础参加还来得及吗?<!----></a><ul class="sidebar-sub-headers"></ul></li><li 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href="/xuexiluxian/lanqiaobei.html#🌞七、蓝桥年真题资源-配套考试环境" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="🌞七、蓝桥年真题资源+配套考试环境"><!---->🌞七、蓝桥年真题资源+配套考试环境<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/xuexiluxian/algorithm.html" class="nav-link sidebar-link sidebar-page" aria-label="算法和数据结构学习路线"><!---->算法和数据结构学习路线<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->蓝桥杯学习路线（建议收藏👍）</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月31日</span><meta property="datePublished" content="2022-03-31T02:38:06.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>学习路线</li><meta property="articleSection" content="学习路线"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag8" role>蓝桥杯</li></ul><meta property="keywords" content="蓝桥杯"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 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class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/lanqiaobei.html#🌞一、蓝桥杯到底是什么" class="router-link-active router-link-exact-active toc-link level3">🌞一、蓝桥杯到底是什么?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/lanqiaobei.html#🌞二、我们为什么要参加蓝桥杯" class="router-link-active router-link-exact-active toc-link level3">🌞二、我们为什么要参加蓝桥杯?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/lanqiaobei.html#🌞三、现在0基础参加还来得及吗" class="router-link-active router-link-exact-active toc-link level3">🌞三、现在0基础参加还来得及吗?</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/lanqiaobei.html#🌞四、蓝桥杯考的是什么-难吗-和acm有什么区别" class="router-link-active router-link-exact-active toc-link level3">🌞四、蓝桥杯考的是什么?难吗？和ACM有什么区别？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/lanqiaobei.html#🌞五、备战蓝桥的学习路线和刷题网站" class="router-link-active router-link-exact-active toc-link level3">🌞五、备战蓝桥的学习路线和刷题网站</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/lanqiaobei.html#🌞六、如何正确的刷题" class="router-link-active router-link-exact-active toc-link level3">🌞六、如何正确的刷题？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/lanqiaobei.html#🌞七、蓝桥年真题资源-配套考试环境" class="router-link-active router-link-exact-active toc-link level3">🌞七、蓝桥年真题资源+配套考试环境</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="蓝桥杯学习路线-建议收藏" tabindex="-1"><a class="header-anchor" href="#蓝桥杯学习路线-建议收藏" aria-hidden="true">#</a> 蓝桥杯学习路线（建议收藏👍）</h1><ul><li>蓝桥杯到底是啥？</li><li>蓝桥杯适合我参加吗？</li><li>我现在零基础还来得急吗？</li><li>我要是陪跑了报名费三百块岂不是交智商税了？</li><li>就算报名了我该如何去训练呢?</li></ul><p>话不多说，我们挨个解答（结尾有免费的真题和解析以及配套的考试环境搭建，迫不及待地小伙伴可以直接长按识别/扫描下方二维码回复关键字「<strong>蓝桥杯</strong>」获取）</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongzhonghao.png" alt="扫码关注后回复「蓝桥杯」关键字"></p><h3 id="🌞一、蓝桥杯到底是什么" tabindex="-1"><a class="header-anchor" href="#🌞一、蓝桥杯到底是什么" aria-hidden="true">#</a> 🌞一、蓝桥杯到底是什么?</h3><p><strong>蓝桥杯全国软件和信息技术专业人才大赛，是由工业和信息化部人才交流中心举办的全国性IT学科赛事</strong>。全国1200余所高校参赛，累计参赛人数超过40万人。蓝桥杯大赛连续两年被列入中国高等教育学会发布的“全国普通高校学科竞赛排行榜”，是高校教育教学改革和创新人才培养的重要竞赛项目。对大学生综合评测，奖学金评定，升学考研都有一定助益。</p><p>蓝桥杯大赛共包括三个竞赛组别：</p><ul><li>个人赛-软件类</li><li>个人赛-电子类</li><li>视觉艺术大赛</li></ul><p>其中个人赛-软件类的比赛科目包括C/C++程序设计、Java软件开发、Python程序设计。</p><p>附上蓝桥杯官网地址：蓝桥杯官网（个人报名通道即将开启，看完这篇文章赶快去报名吧）</p><blockquote><p><a href="https://dasai.lanqiao.cn/" target="_blank" rel="noopener noreferrer">https://dasai.lanqiao.cn/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><h3 id="🌞二、我们为什么要参加蓝桥杯" tabindex="-1"><a class="header-anchor" href="#🌞二、我们为什么要参加蓝桥杯" aria-hidden="true">#</a> 🌞二、我们为什么要参加蓝桥杯?</h3><p><strong>🍋第一、含金量高，被绝大多数高校和企业认可</strong></p><p>其实从上面蓝桥杯的简介我们就能看出来，蓝桥杯在我国高校中的it比赛中的知名度非常高，即使是清华北大和顶尖985的高校学子参加的人也是络绎不绝。</p><p>只要你获得好成绩，甚至能当场获得一些大厂的青睐，如像百度、方正等大公司。 即使你没有获得非常优秀的成绩，它同样对你的大学生综合评测，奖学金评定，升学考研都有一定助益。可以说是作为it大学生不可或缺的一项比赛。</p><p><strong>🍋第二、分组比赛，防止被&quot;屠杀&quot;</strong></p><p>这是蓝桥杯最有特色也是它最贴心的地方，蓝桥杯的赛道分为：</p><ul><li>研究生组，研究生只能参加这个。</li><li>大学A组，重点本科参加的组别，包括所有985、211的学校。</li><li>大学B组，普通本科院校，也是参赛人数几乎最多的赛道。</li><li>大学C组，高职高专组。</li></ul><p>高组别的不能报考低组别的，但是低组别可以越级报考高组别，比如你是普通本科你也可以报考大学A组（只要你有自信）。</p><p>这样的分组有什么好处呢？</p><p>它将实力相近的人群放到一个组别，防止参赛选手实力差距过大，导致奖项全被更好的学校包揽。为每一个高校学子都提供了一个更加公平的竞技平台。</p><p>举个例子：一个B组或C组的参加比赛，发现遇到的都是顶尖985的ACM职业比赛选手来降维打击，那不是被吃的渣都不剩。这样低组别的话学生谁还会想报名呢？</p><p><strong>🍋第三、参赛门槛低，获奖容易</strong></p><p>这一点通过上面大家都可以感受得到，蓝桥杯是所有的高校学子都有参加的赛事。而且即使你不以院校的名义参加，现在也可以以个人的名义参加比赛，只需要缴纳报名费三百元即可。</p><p>有的人一听到这，三百？这么多。别担心，蓝桥杯的比赛基本上只要你肯认真去学习准备，拿个最低的省三等奖是非常容易的，而大部分的院校只要你能拿奖，是都可以报销的。</p><p>当然你要说你光报名不去准备那肯定这三百块是去交智商税了。</p><p>顺带说说蓝桥杯的获奖机制，蓝桥杯分为省赛和国赛。</p><p>省赛排名的前百分之10获得省一等奖，接下来的百分之20为省二等奖，再下来的百分之30省三等奖。</p><p>可以说，只要你的排名在前60%你就可以获奖，你就可以报销报名费了。</p><p>如果你有幸拿了省一等奖，还可以参加国赛，进入国赛后即使你最差也可以拿到一个国家三等奖。可以说蓝桥杯这样的获奖机制，即使是大一大二的学习参加，获奖也是非常容易的。即使大一大二未取得很好的成绩，可有了这次比赛经验，大三大四再去参加就已经比其他选手有着不小的优势了。</p><p><strong>🍋第四、公司对算法的能力要求越来越高</strong></p><p>现在整个it行业的公司无论是大厂还是小厂，无论是校招还是社招，对算法的考差都是必须的。对于大厂来说，你的算法不过关，不好意思我们不要你。对于小厂来说，你的算法不过关，对不起我们不能给你更高的职位和薪资。</p><p>所以在我们准备蓝桥杯的过程学习算法的过程，同时也是为了我们未来就业做准备。可以说，算法能力决定了你的钱途和前途。想要在未来拿个好offer，参加蓝桥杯正是你不可或缺的。</p><h3 id="🌞三、现在0基础参加还来得及吗" tabindex="-1"><a class="header-anchor" href="#🌞三、现在0基础参加还来得及吗" aria-hidden="true">#</a> 🌞三、现在0基础参加还来得及吗?</h3><p>现在参加一点都不晚。</p><p>蓝桥杯现在只是处在报名阶段，它真正比赛的日期要在明年四月份左右。不严格意义的来算，你甚至还有半年的时间去学习和准备。</p><p><strong>任何事情能够坚持半年，都能为一个人带来巨大的蜕变</strong>。只要你每周能拿出一点时间学习算法，持之以恒，正所谓士别三日还将刮目想看，半年的学习，完全能让你成功成为一个算法小将，甚至更加优秀。</p><h3 id="🌞四、蓝桥杯考的是什么-难吗-和acm有什么区别" tabindex="-1"><a class="header-anchor" href="#🌞四、蓝桥杯考的是什么-难吗-和acm有什么区别" aria-hidden="true">#</a> 🌞四、蓝桥杯考的是什么?难吗？和ACM有什么区别？</h3><p>蓝桥杯的省赛有十道题，四个小时的时间。题目有填空题和编程题，填空题只要你的答案正确即可得分，编程题即使你的答案不对，也可以按步骤得分，可以说非常的人性化。</p><p>它不同于ACM的ACM团队赛制，ACM题目是英语的，必须运行的结果正确才可得分。ACM的题目要更加难，考察的更多是人的思维能力，也可以说是天赋，它并不适合大部分人去参加，而且需要付出的时间也更多。</p><p>而蓝桥杯的题目虽然称不上是非常难，但也并非人人都能会的。但你如果肯花一些时间去学习，那它给你的结果也肯定不会让你失望。它的题型比较单一，更多的是考差学习掌握了哪些算法能力。<strong>蓝桥杯的题型更喜欢考暴力、枚举、动规等问题</strong>。</p><h3 id="🌞五、备战蓝桥的学习路线和刷题网站" tabindex="-1"><a class="header-anchor" href="#🌞五、备战蓝桥的学习路线和刷题网站" aria-hidden="true">#</a> 🌞五、备战蓝桥的学习路线和刷题网站</h3><p>如果你是C/C++的选手，那我劝你一定要认真学好所有的基础算法。C和C++都是非常适合用来写算法的语言，所以这个组别的选手大多都是有一定的实力的，如果你想来混可能被吃的渣都不剩。当然其他两组选手也非常多，所以也需要认真去复习，先看看我归纳的学习路线图。</p><p><img src="https://upload-images.jianshu.io/upload_images/1179389-267796e602b75052.png?imageMogr2/auto-orient/strip|imageView2/2/w/1240" alt=""></p><p>不要一下觉得很多，很多都是在学校的课程中学到过的，而且你还有半年的时间，想要掌握这里面的大部分算法完全时间绰绰有余。当然也为大家推荐了一些好的学习算法和数据结构的网站</p><p>力扣（yyds）：</p><blockquote><p><a href="https://leetcode-cn.com/" target="_blank" rel="noopener noreferrer">https://leetcode-cn.com/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>牛客网（同样经典的刷题网站）：</p><blockquote><p><a href="https://www.nowcoder.com/activity/oj?tab=1" target="_blank" rel="noopener noreferrer">https://www.nowcoder.com/activity/oj?tab=1<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>PTA（适合小白）：</p><blockquote><p><a href="https://pintia.cn/" target="_blank" rel="noopener noreferrer">https://pintia.cn/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>VisuAlgo 数据结构和算法动态可视化（学习数据结构的神器）：</p><blockquote><p><a href="https://visualgo.net/zh" target="_blank" rel="noopener noreferrer">https://visualgo.net/zh<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>蓝桥云课（蓝桥杯官方学习网站）：</p><blockquote><p><a href="https://www.lanqiao.cn/" target="_blank" rel="noopener noreferrer">https://www.lanqiao.cn/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>当然别忘记了哔哩哔哩大学，里面也有非常优秀的资源，下面向大家推荐几个我自己学习过的：</p><p>图灵数据结构与算法：</p><p><img src="https://upload-images.jianshu.io/upload_images/1179389-1f0e23da66059bd3.png?imageMogr2/auto-orient/strip|imageView2/2/w/1240" alt=""></p><blockquote><p><a href="https://www.bilibili.com/video/BV1a54y1b74k" target="_blank" rel="noopener noreferrer">https://www.bilibili.com/video/BV1a54y1b74k<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>可能是最好的Java数据结构教程：</p><p><img src="https://upload-images.jianshu.io/upload_images/1179389-589bf36b1ec3191d.png?imageMogr2/auto-orient/strip|imageView2/2/w/1240" alt=""></p><blockquote><p><a href="https://www.bilibili.com/video/BV1iJ411E7xW" target="_blank" rel="noopener noreferrer">https://www.bilibili.com/video/BV1iJ411E7xW<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>还有 C 站上最强的算法大佬，英雄哪里出来。</p><blockquote><p><a href="https://blog.csdn.net/whereisherofrom" target="_blank" rel="noopener noreferrer">https://blog.csdn.net/whereisherofrom<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>大佬的文章讲解了各种从易到难的算法，而且讲的非常透彻。</p><h3 id="🌞六、如何正确的刷题" tabindex="-1"><a class="header-anchor" href="#🌞六、如何正确的刷题" aria-hidden="true">#</a> 🌞六、如何正确的刷题？</h3><p>这里我结合自身刷题的经验和一些博主的推荐向大家推荐一下，如果你是零基础或者基础不好的，每次只是闲着无聊才坐一两题，现在想系统的学习算法。我推荐你先去力扣网站。</p><p><img src="https://img-blog.csdnimg.cn/40f236b195004f738e89a1c6277947ac.png" alt=""></p><p>在这选择难度简单，然后挑一些题解量高，通过率高的题目试试水。这类题目基本比较简单，不会涉及到什么算法，每次提交成功都可以激发你学习算法的兴趣。</p><p>即使做不出来里面也有许多大佬的题解五花八门，让你们一眼看懂他们的神奇思路。有的人总是好高骛远，入门就去学什么贪心动态，一道题看两三个钟头，结果最后题解都看不懂，这是学习算法的大忌。</p><p>等你试水完毕有了一定做题经验后，我推荐你去参加力扣的学习计划专栏，这些都是免费的，从双指针到动规和数据结构都有，可以帮你一步一步帮你训练出优秀的算法能力。</p><p><img src="https://img-blog.csdnimg.cn/3e2c94a9bed44193a6e18c2d6a0df7a6.png" alt=""></p><p><strong>刷题也千万不要忘记归纳总结</strong>！！！</p><p>刷题并不是刷完就过了即可，题目在变化，但题型永远就那么一些。只有归纳出属于自己的一套笔记，才能做题越来越得心应手。将考点相同的算法点总结，再去寻找类似的算法题看能否做出来检验自己，这样才能搞明白自己是否真的学会了这个算法。</p><p>我为大家推荐的是我自己常用的笔记软件语雀，贴上部分我做的笔记，可以直接贴图非常方便。当然还有有道云笔记，Typora等等都非常不错。</p><p><img src="https://img-blog.csdnimg.cn/9881f0d441514f9e9de5d7da3f7aa4e8.png" alt=""></p><h3 id="🌞七、蓝桥年真题资源-配套考试环境" tabindex="-1"><a class="header-anchor" href="#🌞七、蓝桥年真题资源-配套考试环境" aria-hidden="true">#</a> 🌞七、蓝桥年真题资源+配套考试环境</h3><p><img src="https://upload-images.jianshu.io/upload_images/1179389-966a1b1b2b82e154.png?imageMogr2/auto-orient/strip|imageView2/2/w/1240" alt=""></p><p>费了九牛二虎之力，终于搞到了这些关于蓝桥杯的学习资料，如果能认真刷完，想输很难的，想交学费很难的——妥妥地赢回来。</p><p><strong>怎么获取呢？</strong></p><p>由于资料非常容易被河蟹，需要的小伙伴可以长按识别/扫描关注公众号「<strong>沉默王二</strong>」，回复关键字「<strong>蓝桥杯</strong>」即可获取。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongzhonghao.png" alt="扫码关注后回复「蓝桥杯」关键字"></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/xuexiluxian/lanqiaobei.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 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33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月1日</span><meta property="datePublished" content="2022-03-01T07:46:01.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>学习路线</li><meta property="articleSection" content="学习路线"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag2" role>操作系统</li></ul><meta property="keywords" content="操作系统"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 8 分钟</span><meta property="timeRequired" content="PT8M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/os.html#一、哈工大的《操作系统》实验课" class="router-link-active router-link-exact-active toc-link level3">一、哈工大的《操作系统》实验课</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/os.html#二、mit-6-268-和-6-s081" class="router-link-active router-link-exact-active toc-link level3">二、MIT 6.268 和 6.S081</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/os.html#三、硬核-os-pdf" class="router-link-active router-link-exact-active toc-link level3">三、硬核 OS PDF</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="操作系统学习路线-建议收藏" tabindex="-1"><a class="header-anchor" href="#操作系统学习路线-建议收藏" aria-hidden="true">#</a> 操作系统学习路线（建议收藏👍）</h1><p>操作系统是管理计算机硬件和软件资源的程序，是计算机的基石。</p><p>举个例子来讲，像 Java 中的并发编程这块，如果连进程调度的相关原理、同步和互斥都搞不懂，那多半会有两种结果：</p><ul><li>写出来的多线程程序出现了各种奇奇怪怪的问题；</li><li>不知道为什么出现这些问题。</li></ul><p>喜欢视频版的话，可以到 B 站看二哥的操作系统学习路线版：</p><blockquote><p><a href="https://www.bilibili.com/video/BV1th411b7in" target="_blank" rel="noopener noreferrer">https://www.bilibili.com/video/BV1th411b7in<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><strong>操作系统该怎么学呢？入门推荐两门视频课程</strong>。</p><p>先看一门国内的，再看一门国外的，中西合璧，药效持久。</p><h3 id="一、哈工大的《操作系统》实验课" tabindex="-1"><a class="header-anchor" href="#一、哈工大的《操作系统》实验课" aria-hidden="true">#</a> 一、哈工大的《操作系统》实验课</h3><p>国内的推荐哈工大的《操作系统》实验课，以下四部分最为重要。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/os-1.png" alt=""></p><p>1）操作系统基础篇</p><blockquote><p><a href="https://mooc.study.163.com/course/1000002004" target="_blank" rel="noopener noreferrer">https://mooc.study.163.com/course/1000002004<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>2）操作系统之进程与线程</p><blockquote><p><a href="https://mooc.study.163.com/course/1000002008" target="_blank" rel="noopener noreferrer">https://mooc.study.163.com/course/1000002008<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>3）操作系统之内存管理</p><blockquote><p><a href="https://mooc.study.163.com/course/1000003007" target="_blank" rel="noopener noreferrer">https://mooc.study.163.com/course/1000003007<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>4）操作系统之外设与文件系统</p><blockquote><p><a href="https://mooc.study.163.com/course/1000002009" target="_blank" rel="noopener noreferrer">https://mooc.study.163.com/course/1000002009<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>哈工大的操作系统课是该校 CS 课程中含金量最高的，尤其是实验课。八个实验涉及到了操作系统的核心部分，虽然 lab 不是在哈工大自创的 HITOS 上，但 linux-0.11 确实是一个非常好的选择。</p><p>Linux-0.11 这个版本能让学生更加专注于实验，而不是纠结于各种奇奇怪怪的问题，作为 OS 入门算是足够了。</p><p>Linux 发展到现在，内核源码与 0.11 相比，几乎是翻天覆地的变化，但这不代表研究 linux-0.11 就没有意义，毕竟内核这东西，你懂的。。。</p><p>多的不说，学完 linux-0.11 后，你至少能明白，原来一个最简单的完整的操作系统，是这个样子的：它是这样一步步从 BIOS 开始加载程序加载数据的，它是这样实现单 CPU 多任务多进程调度和切换的。</p><p>Linux 内核主要由 5 个模块构成，分别是：</p><ul><li>进程调度模块，负责控制进程对 CPU 资源的使用。</li><li>内存管理模块，用于确保所有进程能够安全地共享主机内存，同时，内存管理模块还支持虚拟内存管理方式，使得进程所使用的内存比实际的内存更多。</li><li>文件系统模块，用于支持对外部设备的驱动和存储。linux-0.95 版本又逐步实现了虚拟文件系统，该模块通过向所有的外部存储设备提供一个通用的文件接口，隐藏了各种硬件设备的不同细节，从而兼容其他操作系统。</li><li>进程间通信模块，用于支持多种进程间的信息交换方式。</li><li>网络接口模块（linux-0.96 版本才有），提供对多种网络通信标准的访问并支持网络硬件。</li></ul><p>它们之间的依赖关系见下图所示。其实连线代表它们之间的依赖关系，虚线代表 linux-0.11 中还未实现的部分。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/os-2.png" alt=""></p><p>由上图可以看得出，所有模块都与进程调度模块存在依赖关系，因为它们都需要进程调度程序来挂起或重新运行它们的进程。</p><p>linux-0.11 的学习推荐《Linux 内核完全注释》，该书对 linux-0.11 的全部代码文件进行了详细全面的注释和说明，能够让大家在尽量短的时间内对 Linux 的工作机制有一个全面而深刻的理解，为进一步学习 Linux 系统打下坚实的基础。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/os-3.jpg" alt=""></p><p>高清 PDF 版在 GitHub 上的一个开源仓库（JavaBooks）里可以找得到（附 linux-0.11 内核的源码）：</p><blockquote><p><a href="https://github.com/itwanger/JavaBooks#Linux%E5%86%85%E6%A0%B8" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/JavaBooks#Linux%E5%86%85%E6%A0%B8<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>我在逛 GitHub 的时候发现了这样一个仓库：</p><blockquote><p><a href="https://github.com/hoverwinter/HIT-OSLab" target="_blank" rel="noopener noreferrer">https://github.com/hoverwinter/HIT-OSLab<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>作者大四，他的这门操作系统实验课满分，打算自己写一个 OS，就顺带把之前的代码给开源了出来，希望对学习操作系统，以及对哈工大这门实验课感兴趣的同学一些参考。</p><p>其中 lab1-lab7 给出了修改的部分，lab 8 给出了完整的修改后的 linux-0.11 的代码。虽然这个仓库已经有好多年没有更新了，但仍然有参考的价值。</p><p>作者的那句：“Just coding system，it’s fantastic！”我觉得也蛮给力的。</p><h3 id="二、mit-6-268-和-6-s081" tabindex="-1"><a class="header-anchor" href="#二、mit-6-268-和-6-s081" aria-hidden="true">#</a> 二、MIT 6.268 和 6.S081</h3><p>国外的强烈推荐 MIT 6.268 这门课（主要研究生级别），是一门公认的硬核课程，一直以来都有很高的知名度，广受好评，是理论与实践相结合的经典。</p><blockquote><p><a href="https://pdos.csail.mit.edu/6.828/2018/schedule.html" target="_blank" rel="noopener noreferrer">https://pdos.csail.mit.edu/6.828/2018/schedule.html<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>不过，在学习这门课之前，最好之前有过一些操作系统的基础，比如说上过本校的 OS 课，比如说阅读过《操作系统导论》这本书，比如说熟悉 C语言和汇编，对计算机组成原理也有一定的了解。</p><p>这门课有多牛逼呢？</p><blockquote><p>举个例子，以陈波老师为首的上海交通大学的 IPADS 实验室可以说是国内最强的操作系统相关实验室之一了，而陈波老师等人在读博阶段就完成了 6.828 课程的学习，并且在此基础上开发了 corey 操作系统，并发表了一篇被广泛引用的论文：Corey——An operating system for many cores。</p></blockquote><p>如果觉得这门课的难度有点大，可以选择 MIT 的 6.S081（Introduction to Operating System，操作系统导论）这门课，主要针对本科生级别。</p><blockquote><p><a href="https://pdos.csail.mit.edu/6.S081/2020/schedule.html" target="_blank" rel="noopener noreferrer">https://pdos.csail.mit.edu/6.S081/2020/schedule.html<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>6.S081 这门课是基于一个类似于 Unix，但比 Unix 简单得多的一个教学操作系统 XV6 来讲解的，虽然不是原汁原味的 Linux，但对于理解 Linux 的工作方式和结构是足够了。</p><p>这门课是全英文的形式，video 链接里甚至没有英文字幕，对于国内的同学来说，如果英文功底一般的话，很难较好的理解这门课程。</p><p>下图是课程表，里面有 PDF 和 video 链接🔗。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/os-4.png" alt=""></p><p>为了减轻大家的学习压力，我在哔哩哔哩上找到了这门课的克隆版，但中英文字幕的那种。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/os-5.png" alt=""></p><p>哇，有了中英文字幕，学起来就舒服多了。课程地址我贴一下：</p><blockquote><p><a href="https://www.bilibili.com/video/BV19k4y1C7kA" target="_blank" rel="noopener noreferrer">https://www.bilibili.com/video/BV19k4y1C7kA<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>除了这个，我还找到了一份中文版的在线阅读文档，总共有 35 万字左右，据作者说，他大概花费了 200 个小时，辛苦劳作的结果是不仅作者自己的知识盲区补全了，也为后来者留下了一笔不可多得的学习资料。害，除了能蹦出“牛逼”两个字外，我想不到更惊艳的词汇了！</p><blockquote><p><a href="https://mit-public-courses-cn-translatio.gitbook.io/mit6-s081/" target="_blank" rel="noopener noreferrer">https://mit-public-courses-cn-translatio.gitbook.io/mit6-s081/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/os-6.png" alt=""></p><p>这门课的一部分会讲操作系统的基本概念，一部分是 lab，几乎每周都会有一些编程实验。</p><p>我们都知道，操作系统很重要，那操作系统的学习单靠看和听肯定是不行的，必须配合实战来。做实验的意义就在于能帮我们获得一些使用和实现操作系统的实际动手经验。</p><p>还有xiaofan 的学习笔记也是非常值得参考的：</p><blockquote><p><a href="https://fanxiao.tech/posts/MIT-6S081-notes/#11-processes-and-memory" target="_blank" rel="noopener noreferrer">https://fanxiao.tech/posts/MIT-6S081-notes/#11-processes-and-memory<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/os-7.png" alt=""></p><p>学习 6.S081 这门课的目的有三个：</p><ul><li>理解操作系统的设计和实现</li><li>能动手扩展一个小型 OS</li><li>能动手实现系统应用</li></ul><h3 id="三、硬核-os-pdf" tabindex="-1"><a class="header-anchor" href="#三、硬核-os-pdf" aria-hidden="true">#</a> 三、硬核 OS PDF</h3><p>这里给大家推荐两门超级硬核的操作系统学习资料，我都已经整理成 PDF 了。</p><p><strong>第一份，给操作系统捋条线</strong>，看图感受一下吧。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/os-8.png" alt=""></p><p>需要的小伙伴请长按识别/扫描下方的二维码关注作者的原创公众号「<strong>沉默王二</strong>」回复关键字「<strong>os</strong>」就可以拉取到了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongzhonghao.png" alt="扫码关注后回复「os」关键字"></p><p><strong>第二份，操作系统核心知识点</strong>，同样看图感受一下吧。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/os-9.png" alt=""></p><p>需要的小伙伴同样可以通过上面的方式获取到。</p><p>有一说一，操作系统确实难刷，大家在刷的过程中一定要记得多喝水，因为这门课实在是太干了。说实话，光是整理这两门课的过程，我就又 get 到了不少新鲜的知识点。希望我推荐的这两门课算是抛砖引玉吧，大家一起冲！</p><p>记住一点，<strong>动手很重要，动手做 lab 很重要</strong>。</p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/xuexiluxian/os.md" rel="noopener 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106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>学习路线</li><meta property="articleSection" content="学习路线"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag2" role>操作系统</li></ul><meta property="keywords" content="操作系统"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 8 分钟</span><meta property="timeRequired" content="PT8M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/os.html#一、哈工大的《操作系统》实验课" class="router-link-active router-link-exact-active toc-link level3">一、哈工大的《操作系统》实验课</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/os.html#二、mit-6-268-和-6-s081" class="router-link-active router-link-exact-active toc-link level3">二、MIT 6.268 和 6.S081</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/os.html#三、硬核-os-pdf" class="router-link-active router-link-exact-active toc-link level3">三、硬核 OS PDF</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="操作系统学习路线-建议收藏" tabindex="-1"><a class="header-anchor" href="#操作系统学习路线-建议收藏" aria-hidden="true">#</a> 操作系统学习路线（建议收藏👍）</h1><p>操作系统是管理计算机硬件和软件资源的程序，是计算机的基石。</p><p>举个例子来讲，像 Java 中的并发编程这块，如果连进程调度的相关原理、同步和互斥都搞不懂，那多半会有两种结果：</p><ul><li>写出来的多线程程序出现了各种奇奇怪怪的问题；</li><li>不知道为什么出现这些问题。</li></ul><p>喜欢视频版的话，可以到 B 站看二哥的操作系统学习路线版：</p><blockquote><p><a href="https://www.bilibili.com/video/BV1th411b7in" target="_blank" rel="noopener noreferrer">https://www.bilibili.com/video/BV1th411b7in<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><strong>操作系统该怎么学呢？入门推荐两门视频课程</strong>。</p><p>先看一门国内的，再看一门国外的，中西合璧，药效持久。</p><h3 id="一、哈工大的《操作系统》实验课" tabindex="-1"><a class="header-anchor" href="#一、哈工大的《操作系统》实验课" aria-hidden="true">#</a> 一、哈工大的《操作系统》实验课</h3><p>国内的推荐哈工大的《操作系统》实验课，以下四部分最为重要。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/os-1.png" alt=""></p><p>1）操作系统基础篇</p><blockquote><p><a href="https://mooc.study.163.com/course/1000002004" target="_blank" rel="noopener noreferrer">https://mooc.study.163.com/course/1000002004<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>2）操作系统之进程与线程</p><blockquote><p><a href="https://mooc.study.163.com/course/1000002008" target="_blank" rel="noopener noreferrer">https://mooc.study.163.com/course/1000002008<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>3）操作系统之内存管理</p><blockquote><p><a href="https://mooc.study.163.com/course/1000003007" target="_blank" rel="noopener noreferrer">https://mooc.study.163.com/course/1000003007<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>4）操作系统之外设与文件系统</p><blockquote><p><a href="https://mooc.study.163.com/course/1000002009" target="_blank" rel="noopener noreferrer">https://mooc.study.163.com/course/1000002009<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>哈工大的操作系统课是该校 CS 课程中含金量最高的，尤其是实验课。八个实验涉及到了操作系统的核心部分，虽然 lab 不是在哈工大自创的 HITOS 上，但 linux-0.11 确实是一个非常好的选择。</p><p>Linux-0.11 这个版本能让学生更加专注于实验，而不是纠结于各种奇奇怪怪的问题，作为 OS 入门算是足够了。</p><p>Linux 发展到现在，内核源码与 0.11 相比，几乎是翻天覆地的变化，但这不代表研究 linux-0.11 就没有意义，毕竟内核这东西，你懂的。。。</p><p>多的不说，学完 linux-0.11 后，你至少能明白，原来一个最简单的完整的操作系统，是这个样子的：它是这样一步步从 BIOS 开始加载程序加载数据的，它是这样实现单 CPU 多任务多进程调度和切换的。</p><p>Linux 内核主要由 5 个模块构成，分别是：</p><ul><li>进程调度模块，负责控制进程对 CPU 资源的使用。</li><li>内存管理模块，用于确保所有进程能够安全地共享主机内存，同时，内存管理模块还支持虚拟内存管理方式，使得进程所使用的内存比实际的内存更多。</li><li>文件系统模块，用于支持对外部设备的驱动和存储。linux-0.95 版本又逐步实现了虚拟文件系统，该模块通过向所有的外部存储设备提供一个通用的文件接口，隐藏了各种硬件设备的不同细节，从而兼容其他操作系统。</li><li>进程间通信模块，用于支持多种进程间的信息交换方式。</li><li>网络接口模块（linux-0.96 版本才有），提供对多种网络通信标准的访问并支持网络硬件。</li></ul><p>它们之间的依赖关系见下图所示。其实连线代表它们之间的依赖关系，虚线代表 linux-0.11 中还未实现的部分。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/os-2.png" alt=""></p><p>由上图可以看得出，所有模块都与进程调度模块存在依赖关系，因为它们都需要进程调度程序来挂起或重新运行它们的进程。</p><p>linux-0.11 的学习推荐《Linux 内核完全注释》，该书对 linux-0.11 的全部代码文件进行了详细全面的注释和说明，能够让大家在尽量短的时间内对 Linux 的工作机制有一个全面而深刻的理解，为进一步学习 Linux 系统打下坚实的基础。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/os-3.jpg" alt=""></p><p>高清 PDF 版在 GitHub 上的一个开源仓库（JavaBooks）里可以找得到（附 linux-0.11 内核的源码）：</p><blockquote><p><a href="https://github.com/itwanger/JavaBooks#Linux%E5%86%85%E6%A0%B8" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/JavaBooks#Linux%E5%86%85%E6%A0%B8<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>我在逛 GitHub 的时候发现了这样一个仓库：</p><blockquote><p><a href="https://github.com/hoverwinter/HIT-OSLab" target="_blank" rel="noopener noreferrer">https://github.com/hoverwinter/HIT-OSLab<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>作者大四，他的这门操作系统实验课满分，打算自己写一个 OS，就顺带把之前的代码给开源了出来，希望对学习操作系统，以及对哈工大这门实验课感兴趣的同学一些参考。</p><p>其中 lab1-lab7 给出了修改的部分，lab 8 给出了完整的修改后的 linux-0.11 的代码。虽然这个仓库已经有好多年没有更新了，但仍然有参考的价值。</p><p>作者的那句：“Just coding system，it’s fantastic！”我觉得也蛮给力的。</p><h3 id="二、mit-6-268-和-6-s081" tabindex="-1"><a class="header-anchor" href="#二、mit-6-268-和-6-s081" aria-hidden="true">#</a> 二、MIT 6.268 和 6.S081</h3><p>国外的强烈推荐 MIT 6.268 这门课（主要研究生级别），是一门公认的硬核课程，一直以来都有很高的知名度，广受好评，是理论与实践相结合的经典。</p><blockquote><p><a href="https://pdos.csail.mit.edu/6.828/2018/schedule.html" target="_blank" rel="noopener noreferrer">https://pdos.csail.mit.edu/6.828/2018/schedule.html<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>不过，在学习这门课之前，最好之前有过一些操作系统的基础，比如说上过本校的 OS 课，比如说阅读过《操作系统导论》这本书，比如说熟悉 C语言和汇编，对计算机组成原理也有一定的了解。</p><p>这门课有多牛逼呢？</p><blockquote><p>举个例子，以陈波老师为首的上海交通大学的 IPADS 实验室可以说是国内最强的操作系统相关实验室之一了，而陈波老师等人在读博阶段就完成了 6.828 课程的学习，并且在此基础上开发了 corey 操作系统，并发表了一篇被广泛引用的论文：Corey——An operating system for many cores。</p></blockquote><p>如果觉得这门课的难度有点大，可以选择 MIT 的 6.S081（Introduction to Operating System，操作系统导论）这门课，主要针对本科生级别。</p><blockquote><p><a href="https://pdos.csail.mit.edu/6.S081/2020/schedule.html" target="_blank" rel="noopener noreferrer">https://pdos.csail.mit.edu/6.S081/2020/schedule.html<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>6.S081 这门课是基于一个类似于 Unix，但比 Unix 简单得多的一个教学操作系统 XV6 来讲解的，虽然不是原汁原味的 Linux，但对于理解 Linux 的工作方式和结构是足够了。</p><p>这门课是全英文的形式，video 链接里甚至没有英文字幕，对于国内的同学来说，如果英文功底一般的话，很难较好的理解这门课程。</p><p>下图是课程表，里面有 PDF 和 video 链接🔗。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/os-4.png" alt=""></p><p>为了减轻大家的学习压力，我在哔哩哔哩上找到了这门课的克隆版，但中英文字幕的那种。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/os-5.png" alt=""></p><p>哇，有了中英文字幕，学起来就舒服多了。课程地址我贴一下：</p><blockquote><p><a href="https://www.bilibili.com/video/BV19k4y1C7kA" target="_blank" rel="noopener noreferrer">https://www.bilibili.com/video/BV19k4y1C7kA<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>除了这个，我还找到了一份中文版的在线阅读文档，总共有 35 万字左右，据作者说，他大概花费了 200 个小时，辛苦劳作的结果是不仅作者自己的知识盲区补全了，也为后来者留下了一笔不可多得的学习资料。害，除了能蹦出“牛逼”两个字外，我想不到更惊艳的词汇了！</p><blockquote><p><a href="https://mit-public-courses-cn-translatio.gitbook.io/mit6-s081/" target="_blank" rel="noopener noreferrer">https://mit-public-courses-cn-translatio.gitbook.io/mit6-s081/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/os-6.png" alt=""></p><p>这门课的一部分会讲操作系统的基本概念，一部分是 lab，几乎每周都会有一些编程实验。</p><p>我们都知道，操作系统很重要，那操作系统的学习单靠看和听肯定是不行的，必须配合实战来。做实验的意义就在于能帮我们获得一些使用和实现操作系统的实际动手经验。</p><p>还有xiaofan 的学习笔记也是非常值得参考的：</p><blockquote><p><a href="https://fanxiao.tech/posts/MIT-6S081-notes/#11-processes-and-memory" target="_blank" rel="noopener noreferrer">https://fanxiao.tech/posts/MIT-6S081-notes/#11-processes-and-memory<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/os-7.png" alt=""></p><p>学习 6.S081 这门课的目的有三个：</p><ul><li>理解操作系统的设计和实现</li><li>能动手扩展一个小型 OS</li><li>能动手实现系统应用</li></ul><h3 id="三、硬核-os-pdf" tabindex="-1"><a class="header-anchor" href="#三、硬核-os-pdf" aria-hidden="true">#</a> 三、硬核 OS PDF</h3><p>这里给大家推荐两门超级硬核的操作系统学习资料，我都已经整理成 PDF 了。</p><p><strong>第一份，给操作系统捋条线</strong>，看图感受一下吧。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/os-8.png" alt=""></p><p>需要的小伙伴请长按识别/扫描下方的二维码关注作者的原创公众号「<strong>沉默王二</strong>」回复关键字「<strong>os</strong>」就可以拉取到了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/gongzhonghao.png" alt="扫码关注后回复「os」关键字"></p><p><strong>第二份，操作系统核心知识点</strong>，同样看图感受一下吧。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/os-9.png" alt=""></p><p>需要的小伙伴同样可以通过上面的方式获取到。</p><p>有一说一，操作系统确实难刷，大家在刷的过程中一定要记得多喝水，因为这门课实在是太干了。说实话，光是整理这两门课的过程，我就又 get 到了不少新鲜的知识点。希望我推荐的这两门课算是抛砖引玉吧，大家一起冲！</p><p>记住一点，<strong>动手很重要，动手做 lab 很重要</strong>。</p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/xuexiluxian/os.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 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aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>学习路线</li><meta property="articleSection" content="学习路线"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag2" role>Python</li></ul><meta property="keywords" content="Python"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 2 分钟</span><meta property="timeRequired" content="PT2M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="python学习路线-建议收藏" tabindex="-1"><a class="header-anchor" href="#python学习路线-建议收藏" aria-hidden="true">#</a> Python学习路线（建议收藏👍）</h1><p>先上一张 Python 知识图谱，直观的了解一下 Python 的基本构成与实际应用。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/python-1.png" alt=""></p><p><strong>1）视频篇</strong></p><p>B 站也就是哔哩哔哩，是国内最大的二次元视频网站之一。作为一个半吊子 up 主，我虽然看视频不多，但现在基本想看视频就直接去 B 站了。</p><p>上面也有非常多的 Python 视频可供学习。</p><p>01、小甲鱼零基础入门学习Python，1669.8万播放。画面虽然有点儿童风，但配合 up 幽默的教学风格到也显得非常有意思。</p><blockquote><p><a href="https://www.bilibili.com/video/av4050443" target="_blank" rel="noopener noreferrer">https://www.bilibili.com/video/av4050443<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/python-2.png" alt=""></p><p>02、Python从入门到精通教程，1165.8万播放。虽然是培训机构出品的，但视频质量还过得去，也比较像大学老师的授课风格，况且还可以白票。前 100 集在讲 Linux 基础，没兴趣的可以直接跳过。</p><blockquote><p><a href="https://www.bilibili.com/video/av14184325" target="_blank" rel="noopener noreferrer">https://www.bilibili.com/video/av14184325<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/python-3.png" alt=""></p><p>03、Python编程从入门到实践，84.4万播放。虽然播放量一般，内容也一般，但如果想听萝莉小姐姐的声音的话，可以尝试下，听完整个人都治愈了。</p><blockquote><p><a href="https://www.bilibili.com/video/av35698354" target="_blank" rel="noopener noreferrer">https://www.bilibili.com/video/av35698354<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/python-4.png" alt=""></p><p><strong>2）教程篇</strong></p><p>01、Python 3.10.0 文档，官方文档，毫无疑问是需要学习的。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/python-5.png" alt=""></p><blockquote><p><a href="https://docs.python.org/zh-cn/3/" target="_blank" rel="noopener noreferrer">https://docs.python.org/zh-cn/3/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>02、Python - 100天从新手到大师，112k star，足见受到的关注程度。</p><blockquote><p><a href="https://github.com/jackfrued/Python-100-Days" target="_blank" rel="noopener noreferrer">https://github.com/jackfrued/Python-100-Days<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/python-6.png" alt=""></p><p>03、Python Cookbook，比较适合那些想深入理解 Python 语言机制和现代编程风格的有经验的 Python 程序员。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/python-7.png" alt=""></p><blockquote><p><a href="https://python3-cookbook.readthedocs.io/zh_CN/latest/index.html" target="_blank" rel="noopener noreferrer">https://python3-cookbook.readthedocs.io/zh_CN/latest/index.html<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>更多 Python 的学习资料，可以直接戳我整理的这个 GitHub/码云仓库——📚程序员必读书单整理，附下载地址，里面有大量的 Python 学习资料。</p><ul><li>GitHub 地址：<a href="https://github.com/itwanger/JavaBooks#python" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/JavaBooks<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li>码云地址：<a href="https://gitee.com/itwanger/JavaBooks#python" target="_blank" rel="noopener noreferrer">https://gitee.com/itwanger/JavaBooks<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/python-books.jpg" alt=""></p><p>简单罗列一下：</p><ul><li>《Python+Cookbook》第三版中文</li><li>编程小白的第一本Python入门书</li><li>可爱的Python_中文版</li><li>利用Python进行数据分析</li><li>流畅的python</li><li>深入浅出：使用Python编程</li><li>用Python进行自然语言处理</li><li>Python编程：从入门到实践</li><li>PYTHON自然语言处理【中文版】</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/xuexiluxian/python.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 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class="nav-link sidebar-link sidebar-page" aria-label="蓝桥杯学习路线"><!---->蓝桥杯学习路线<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/xuexiluxian/algorithm.html" class="nav-link sidebar-link sidebar-page" aria-label="算法和数据结构学习路线"><!---->算法和数据结构学习路线<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Python学习路线（建议收藏👍）</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月1日</span><meta property="datePublished" content="2022-03-01T07:46:01.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>学习路线</li><meta property="articleSection" content="学习路线"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag2" role>Python</li></ul><meta property="keywords" content="Python"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 2 分钟</span><meta property="timeRequired" content="PT2M"></span></div><hr></div><!----><!----><div class="theme-hope-content"><h1 id="python学习路线-建议收藏" tabindex="-1"><a class="header-anchor" href="#python学习路线-建议收藏" aria-hidden="true">#</a> Python学习路线（建议收藏👍）</h1><p>先上一张 Python 知识图谱，直观的了解一下 Python 的基本构成与实际应用。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/python-1.png" alt=""></p><p><strong>1）视频篇</strong></p><p>B 站也就是哔哩哔哩，是国内最大的二次元视频网站之一。作为一个半吊子 up 主，我虽然看视频不多，但现在基本想看视频就直接去 B 站了。</p><p>上面也有非常多的 Python 视频可供学习。</p><p>01、小甲鱼零基础入门学习Python，1669.8万播放。画面虽然有点儿童风，但配合 up 幽默的教学风格到也显得非常有意思。</p><blockquote><p><a href="https://www.bilibili.com/video/av4050443" target="_blank" rel="noopener noreferrer">https://www.bilibili.com/video/av4050443<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/python-2.png" alt=""></p><p>02、Python从入门到精通教程，1165.8万播放。虽然是培训机构出品的，但视频质量还过得去，也比较像大学老师的授课风格，况且还可以白票。前 100 集在讲 Linux 基础，没兴趣的可以直接跳过。</p><blockquote><p><a href="https://www.bilibili.com/video/av14184325" target="_blank" rel="noopener noreferrer">https://www.bilibili.com/video/av14184325<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/python-3.png" alt=""></p><p>03、Python编程从入门到实践，84.4万播放。虽然播放量一般，内容也一般，但如果想听萝莉小姐姐的声音的话，可以尝试下，听完整个人都治愈了。</p><blockquote><p><a href="https://www.bilibili.com/video/av35698354" target="_blank" rel="noopener noreferrer">https://www.bilibili.com/video/av35698354<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/python-4.png" alt=""></p><p><strong>2）教程篇</strong></p><p>01、Python 3.10.0 文档，官方文档，毫无疑问是需要学习的。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/python-5.png" alt=""></p><blockquote><p><a href="https://docs.python.org/zh-cn/3/" target="_blank" rel="noopener noreferrer">https://docs.python.org/zh-cn/3/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>02、Python - 100天从新手到大师，112k star，足见受到的关注程度。</p><blockquote><p><a href="https://github.com/jackfrued/Python-100-Days" target="_blank" rel="noopener noreferrer">https://github.com/jackfrued/Python-100-Days<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/python-6.png" alt=""></p><p>03、Python Cookbook，比较适合那些想深入理解 Python 语言机制和现代编程风格的有经验的 Python 程序员。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/python-7.png" alt=""></p><blockquote><p><a href="https://python3-cookbook.readthedocs.io/zh_CN/latest/index.html" target="_blank" rel="noopener noreferrer">https://python3-cookbook.readthedocs.io/zh_CN/latest/index.html<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>更多 Python 的学习资料，可以直接戳我整理的这个 GitHub/码云仓库——📚程序员必读书单整理，附下载地址，里面有大量的 Python 学习资料。</p><ul><li>GitHub 地址：<a href="https://github.com/itwanger/JavaBooks#python" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/JavaBooks<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li>码云地址：<a href="https://gitee.com/itwanger/JavaBooks#python" target="_blank" rel="noopener noreferrer">https://gitee.com/itwanger/JavaBooks<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/python-books.jpg" alt=""></p><p>简单罗列一下：</p><ul><li>《Python+Cookbook》第三版中文</li><li>编程小白的第一本Python入门书</li><li>可爱的Python_中文版</li><li>利用Python进行数据分析</li><li>流畅的python</li><li>深入浅出：使用Python编程</li><li>用Python进行自然语言处理</li><li>Python编程：从入门到实践</li><li>PYTHON自然语言处理【中文版】</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/xuexiluxian/python.md" rel="noopener 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aria-label="蓝桥杯学习路线"><!---->蓝桥杯学习路线<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/xuexiluxian/algorithm.html" class="nav-link sidebar-link sidebar-page" aria-label="算法和数据结构学习路线"><!---->算法和数据结构学习路线<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->前端学习路线（建议收藏👍）</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月16日</span><meta property="datePublished" content="2022-03-16T04:41:17.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>学习路线</li><meta property="articleSection" content="学习路线"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag6" role>前端</li></ul><meta property="keywords" content="前端"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 6 分钟</span><meta property="timeRequired" content="PT6M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/qianduan.html#语言基础" class="router-link-active router-link-exact-active toc-link level3">语言基础</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/qianduan.html#框架和类库" class="router-link-active router-link-exact-active toc-link level3">框架和类库</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/qianduan.html#前端工程" class="router-link-active router-link-exact-active toc-link level3">前端工程</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/qianduan.html#运行环境" class="router-link-active router-link-exact-active toc-link level3">运行环境</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/qianduan.html#项目与业务" class="router-link-active router-link-exact-active toc-link level3">项目与业务</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/qianduan.html#计算机基础" class="router-link-active router-link-exact-active toc-link level3">计算机基础</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="前端学习路线-建议收藏" tabindex="-1"><a class="header-anchor" href="#前端学习路线-建议收藏" aria-hidden="true">#</a> 前端学习路线（建议收藏👍）</h1><p>大家好，我是二哥呀！</p><p>最近总有一些读者私信问我：“能推荐一些前端的学习资料吗？”那作为一名正儿八经的全栈型程序员，必须得给大家整一波了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/qianduan-b6d3ccb4-bd13-447e-b88d-f0016b57da49.png" alt=""></p><h3 id="语言基础" tabindex="-1"><a class="header-anchor" href="#语言基础" aria-hidden="true">#</a> 语言基础</h3><p>1）HTML 教程，里面包含了数百个 HTML 实例，对初学者的友好程度五颗星。</p><blockquote><p><a href="https://www.runoob.com/html/html-tutorial.html" target="_blank" rel="noopener noreferrer">https://www.runoob.com/html/html-tutorial.html<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>2）通用 CSS 笔记、建议与指导，这是一个在 GitHub 上开源的文档，第一部分探讨了 CSS 的语法、格式，并且分析了 CSS 的结构；第二部分围绕方法论、思维框架以及编写规划展开了对 CSS 的讨论。</p><blockquote><p><a href="https://github.com/chadluo/CSS-Guidelines" target="_blank" rel="noopener noreferrer">https://github.com/chadluo/CSS-Guidelines<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>3）JavaScript 入门教程，内容从最简单的开始讲，循序渐进、由浅入深，并配合了大量的代码实例，非常适合初学者。</p><blockquote><p><a href="https://wangdoc.com/javascript/" target="_blank" rel="noopener noreferrer">https://wangdoc.com/javascript/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>4）现代 JavaScript 教程，通过简单但足够详细的内容，讲解了从基础到高阶的 JavaScript 相关知识。</p><blockquote><p><a href="https://zh.javascript.info/" target="_blank" rel="noopener noreferrer">https://zh.javascript.info/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>5）ECMAScript 6 入门教程，全面介绍了 ECMAScript 6 新引入的语法特性。ECMAScript 6.0（简称 ES6）是 JavaScript 语言的下一代标准，它的目标是让 JavaScript 可以用来编写复杂的大型应用程序，成为企业级的编程语言。</p><blockquote><p><a href="https://es6.ruanyifeng.com/" target="_blank" rel="noopener noreferrer">https://es6.ruanyifeng.com/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>6）📚《JavaScript高级程序设计（第3版）》，这是一本实体书，豆瓣评分高达 9.3 分，是前端程序员进阶必看的书籍。据网友说，他参加阿里面试时的一小半问题都出自于此书。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/qianduan-ea8e074a-9bc4-4780-a4b1-acf855df7bc1.png" alt=""></p><p>7）TypeScript 中文版，TypeScript 是 JavaScript 的超集，也可以编译成普通的 JavaScript 代码，这份中文手册紧跟官方的每个细节，是非常好的一份入门教程。</p><blockquote><p><a href="https://zhongsp.gitbooks.io/typescript-handbook/content/" target="_blank" rel="noopener noreferrer">https://zhongsp.gitbooks.io/typescript-handbook/content/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><h3 id="框架和类库" tabindex="-1"><a class="header-anchor" href="#框架和类库" aria-hidden="true">#</a> 框架和类库</h3><p>1）Vue.js 官方文档，讲真，学习一门新技术的时候，官方文档肯定是首选。我推荐的策略是以理解为主，难以理解的内容可以暂时跳过，因为死磕的东西可能一时半会用不上。快速把文章看一遍，扩充自己对这门技术的认知，对以后掌握它会很有帮助。</p><blockquote><p><a href="https://cn.vuejs.org/v2/guide/index.html" target="_blank" rel="noopener noreferrer">https://cn.vuejs.org/v2/guide/index.html<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>2）Vue.js 技术揭秘，这份开源教程的目标是全方位地解析 Vue.js 的实现原理，对源码层面有着很深入的剖析。</p><blockquote><p><a href="https://github.com/ustbhuangyi/vue-analysis" target="_blank" rel="noopener noreferrer">https://github.com/ustbhuangyi/vue-analysis<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>3）微信小程序开发资源汇总，这个开源仓库里收集了微信小程序开发过程中会使用到的资料、问题以及第三方组件库。</p><blockquote><p><a href="https://github.com/justjavac/awesome-wechat-weapp" target="_blank" rel="noopener noreferrer">https://github.com/justjavac/awesome-wechat-weapp<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>4）腾讯移动 Web 前端知识库，这个开源仓库里收集了众多面向亿万级用户级的移动 Web 端解决方案。</p><blockquote><p><a href="https://github.com/AlloyTeam/Mars" target="_blank" rel="noopener noreferrer">https://github.com/AlloyTeam/Mars<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>5）Angular 入门教程，这份官方教程会通过构建一个电子商务网站，介绍 Angular 的基本知识。</p><blockquote><p><a href="https://angular.cn/start" target="_blank" rel="noopener noreferrer">https://angular.cn/start<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>6）React 入门教程，这份教程更适合喜欢边学边做的开发者。</p><blockquote><p><a href="https://zh-hans.reactjs.org/tutorial/tutorial.html" target="_blank" rel="noopener noreferrer">https://zh-hans.reactjs.org/tutorial/tutorial.html<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><h3 id="前端工程" tabindex="-1"><a class="header-anchor" href="#前端工程" aria-hidden="true">#</a> 前端工程</h3><p>1）Webpack 中文文档，Webpack 是一个前端资源加载/打包工具，它根据模块的依赖关系进行静态分析，然后将这些模块按照指定的规则生成对应的静态资源。</p><blockquote><p><a href="https://www.webpackjs.com/concepts/" target="_blank" rel="noopener noreferrer">https://www.webpackjs.com/concepts/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>2）前端开发者必备的Nginx知识，Nginx现在几乎是众多大型网站的必用技术，一名合格的前端工程师，最好能用 Nginx 实现请求过滤、配置 gzip、负载均衡等需求。</p><blockquote><p><a href="https://juejin.cn/post/6844903793918738440" target="_blank" rel="noopener noreferrer">https://juejin.cn/post/6844903793918738440<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>3）猴子都能懂 Git 入门，Git 是一个开源的分布式版本控制系统，用于敏捷高效地处理任何或大或小的项目，那么这份教程可以说是通俗易懂。</p><blockquote><p><a href="https://backlog.com/git-tutorial/cn/" target="_blank" rel="noopener noreferrer">https://backlog.com/git-tutorial/cn/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><h3 id="运行环境" tabindex="-1"><a class="header-anchor" href="#运行环境" aria-hidden="true">#</a> 运行环境</h3><p>1）图解浏览器的基本工作原理，这篇文章图文并茂，里面还有一些质量非常高的视频，帮助前端工程师理解浏览器的工作原理，以及了解从在浏览器地址栏中输入 URL 到页面展现的短短几秒内浏览器究竟做了什么等等。</p><blockquote><p><a href="https://zhuanlan.zhihu.com/p/47407398" target="_blank" rel="noopener noreferrer">https://zhuanlan.zhihu.com/p/47407398<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>2）七天学会 Node.js，这是一份 Node.js 的新手入门教程，涵盖了使用Node.js开发各种程序所必要的知识点。</p><blockquote><p><a href="http://nqdeng.github.io/7-days-nodejs/" target="_blank" rel="noopener noreferrer">http://nqdeng.github.io/7-days-nodejs/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><h3 id="项目与业务" tabindex="-1"><a class="header-anchor" href="#项目与业务" aria-hidden="true">#</a> 项目与业务</h3><p>1）📚《高性能网站建设指南》，这本书介绍了网站性能问题的现状、产生的原因，以及改善或解决性能问题的原则、技术技巧和最佳实践</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/qianduan-92d3c42c-c453-473f-aefc-9137c93a939d.png" alt=""></p><p>2）深入了解前端监控原理，这篇文章主要讲了如何进行数据采集和数据上报。</p><blockquote><p><a href="https://juejin.cn/post/6899430989404045320" target="_blank" rel="noopener noreferrer">https://juejin.cn/post/6899430989404045320<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>3）5 分钟撸一个前端性能监控工具，这篇文章主要对两个指标进行了监控：页面加载时间和资源请求时间。</p><blockquote><p><a href="https://juejin.cn/post/6844903662020460552" target="_blank" rel="noopener noreferrer">https://juejin.cn/post/6844903662020460552<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>4）常见六大Web安全攻防解析，这篇文章分析了 XSS、CSRF、点击劫持、URL跳转漏洞、SQL注入、OS命令注入攻击等 6 种常见的攻击类型和防御方法，来更好的保护我们的数据。</p><blockquote><p><a href="https://github.com/ljianshu/Blog/issues/56" target="_blank" rel="noopener noreferrer">https://github.com/ljianshu/Blog/issues/56<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><h3 id="计算机基础" tabindex="-1"><a class="header-anchor" href="#计算机基础" aria-hidden="true">#</a> 计算机基础</h3><p>1）大前端开发者需要了解的基础编译原理和语言知识</p><blockquote><p><a href="https://zhuanlan.zhihu.com/p/27554023" target="_blank" rel="noopener noreferrer">https://zhuanlan.zhihu.com/p/27554023<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>2）📚《图解HTTP》，前端工程师对网络协议如果能掌握的比较透彻的话，对整体前后端的沟通是非常有帮助的。像 TCP/IP网络协议、三次握手和四次挥手、DNS的作用、CDN的作用和原理、HTTP、HTTPS、WebSocket 等等这些知识点，我认为都是一名合格的前端工程师应该掌握的。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/qianduan-ae981ec4-ea98-4bb1-a1eb-d8a21a9648cb.png" alt=""></p><p>3）JavaScript 实现的算法和数据结构，附详细解释和刷题指南。大部分前端工程师对数据结构与算法这部分知识都有些欠缺，如果想要突破更高的天花板，这部分知识是必不可少的，非常有用！</p><blockquote><p><a href="https://github.com/ConardLi/awesome-coding-js" target="_blank" rel="noopener noreferrer">https://github.com/ConardLi/awesome-coding-js<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>更多前端的学习资料，可以直接戳我整理的这个 GitHub/码云仓库——📚程序员必读书单整理，附下载地址，里面有大量的前端学习资料。</p><ul><li>GitHub 地址：<a href="https://github.com/itwanger/JavaBooks#javascript" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/JavaBooks<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li>码云地址：<a href="https://gitee.com/itwanger/JavaBooks#javascript" target="_blank" rel="noopener noreferrer">https://gitee.com/itwanger/JavaBooks<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/qianduan-books.jpg" alt=""></p><p>简单罗列一下：</p><ul><li>《JavaScript王者归来》.(月影)扫描版</li><li>你不知道的JavaScript</li><li>实战ES2015深入JavaScript现代应用开发-扫描版</li><li>数据结构与算法JavaScript描述</li><li>JavaScript DOM编程艺术 第2版(Jeremy Keith等)</li><li>JavaScript从入门到精通</li><li>JavaScript启示录</li><li>JavaScript异步编程</li><li>JavaScript语言精粹</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/xuexiluxian/qianduan.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 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id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->前端学习路线（建议收藏👍）</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月16日</span><meta property="datePublished" content="2022-03-16T04:41:17.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category0" role>学习路线</li><meta property="articleSection" content="学习路线"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag6" role>前端</li></ul><meta property="keywords" content="前端"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 6 分钟</span><meta property="timeRequired" content="PT6M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/qianduan.html#语言基础" class="router-link-active router-link-exact-active toc-link level3">语言基础</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/qianduan.html#框架和类库" class="router-link-active router-link-exact-active toc-link level3">框架和类库</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/qianduan.html#前端工程" class="router-link-active router-link-exact-active toc-link level3">前端工程</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/qianduan.html#运行环境" class="router-link-active router-link-exact-active toc-link level3">运行环境</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/qianduan.html#项目与业务" class="router-link-active router-link-exact-active toc-link level3">项目与业务</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/xuexiluxian/qianduan.html#计算机基础" class="router-link-active router-link-exact-active toc-link level3">计算机基础</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="前端学习路线-建议收藏" tabindex="-1"><a class="header-anchor" href="#前端学习路线-建议收藏" aria-hidden="true">#</a> 前端学习路线（建议收藏👍）</h1><p>大家好，我是二哥呀！</p><p>最近总有一些读者私信问我：“能推荐一些前端的学习资料吗？”那作为一名正儿八经的全栈型程序员，必须得给大家整一波了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/qianduan-b6d3ccb4-bd13-447e-b88d-f0016b57da49.png" alt=""></p><h3 id="语言基础" tabindex="-1"><a class="header-anchor" href="#语言基础" aria-hidden="true">#</a> 语言基础</h3><p>1）HTML 教程，里面包含了数百个 HTML 实例，对初学者的友好程度五颗星。</p><blockquote><p><a href="https://www.runoob.com/html/html-tutorial.html" target="_blank" rel="noopener noreferrer">https://www.runoob.com/html/html-tutorial.html<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>2）通用 CSS 笔记、建议与指导，这是一个在 GitHub 上开源的文档，第一部分探讨了 CSS 的语法、格式，并且分析了 CSS 的结构；第二部分围绕方法论、思维框架以及编写规划展开了对 CSS 的讨论。</p><blockquote><p><a href="https://github.com/chadluo/CSS-Guidelines" target="_blank" rel="noopener noreferrer">https://github.com/chadluo/CSS-Guidelines<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>3）JavaScript 入门教程，内容从最简单的开始讲，循序渐进、由浅入深，并配合了大量的代码实例，非常适合初学者。</p><blockquote><p><a href="https://wangdoc.com/javascript/" target="_blank" rel="noopener noreferrer">https://wangdoc.com/javascript/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>4）现代 JavaScript 教程，通过简单但足够详细的内容，讲解了从基础到高阶的 JavaScript 相关知识。</p><blockquote><p><a href="https://zh.javascript.info/" target="_blank" rel="noopener noreferrer">https://zh.javascript.info/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>5）ECMAScript 6 入门教程，全面介绍了 ECMAScript 6 新引入的语法特性。ECMAScript 6.0（简称 ES6）是 JavaScript 语言的下一代标准，它的目标是让 JavaScript 可以用来编写复杂的大型应用程序，成为企业级的编程语言。</p><blockquote><p><a href="https://es6.ruanyifeng.com/" target="_blank" rel="noopener noreferrer">https://es6.ruanyifeng.com/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>6）📚《JavaScript高级程序设计（第3版）》，这是一本实体书，豆瓣评分高达 9.3 分，是前端程序员进阶必看的书籍。据网友说，他参加阿里面试时的一小半问题都出自于此书。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/qianduan-ea8e074a-9bc4-4780-a4b1-acf855df7bc1.png" alt=""></p><p>7）TypeScript 中文版，TypeScript 是 JavaScript 的超集，也可以编译成普通的 JavaScript 代码，这份中文手册紧跟官方的每个细节，是非常好的一份入门教程。</p><blockquote><p><a href="https://zhongsp.gitbooks.io/typescript-handbook/content/" target="_blank" rel="noopener noreferrer">https://zhongsp.gitbooks.io/typescript-handbook/content/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><h3 id="框架和类库" tabindex="-1"><a class="header-anchor" href="#框架和类库" aria-hidden="true">#</a> 框架和类库</h3><p>1）Vue.js 官方文档，讲真，学习一门新技术的时候，官方文档肯定是首选。我推荐的策略是以理解为主，难以理解的内容可以暂时跳过，因为死磕的东西可能一时半会用不上。快速把文章看一遍，扩充自己对这门技术的认知，对以后掌握它会很有帮助。</p><blockquote><p><a href="https://cn.vuejs.org/v2/guide/index.html" target="_blank" rel="noopener noreferrer">https://cn.vuejs.org/v2/guide/index.html<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>2）Vue.js 技术揭秘，这份开源教程的目标是全方位地解析 Vue.js 的实现原理，对源码层面有着很深入的剖析。</p><blockquote><p><a href="https://github.com/ustbhuangyi/vue-analysis" target="_blank" rel="noopener noreferrer">https://github.com/ustbhuangyi/vue-analysis<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>3）微信小程序开发资源汇总，这个开源仓库里收集了微信小程序开发过程中会使用到的资料、问题以及第三方组件库。</p><blockquote><p><a href="https://github.com/justjavac/awesome-wechat-weapp" target="_blank" rel="noopener noreferrer">https://github.com/justjavac/awesome-wechat-weapp<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>4）腾讯移动 Web 前端知识库，这个开源仓库里收集了众多面向亿万级用户级的移动 Web 端解决方案。</p><blockquote><p><a href="https://github.com/AlloyTeam/Mars" target="_blank" rel="noopener noreferrer">https://github.com/AlloyTeam/Mars<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>5）Angular 入门教程，这份官方教程会通过构建一个电子商务网站，介绍 Angular 的基本知识。</p><blockquote><p><a href="https://angular.cn/start" target="_blank" rel="noopener noreferrer">https://angular.cn/start<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>6）React 入门教程，这份教程更适合喜欢边学边做的开发者。</p><blockquote><p><a href="https://zh-hans.reactjs.org/tutorial/tutorial.html" target="_blank" rel="noopener noreferrer">https://zh-hans.reactjs.org/tutorial/tutorial.html<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><h3 id="前端工程" tabindex="-1"><a class="header-anchor" href="#前端工程" aria-hidden="true">#</a> 前端工程</h3><p>1）Webpack 中文文档，Webpack 是一个前端资源加载/打包工具，它根据模块的依赖关系进行静态分析，然后将这些模块按照指定的规则生成对应的静态资源。</p><blockquote><p><a href="https://www.webpackjs.com/concepts/" target="_blank" rel="noopener noreferrer">https://www.webpackjs.com/concepts/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>2）前端开发者必备的Nginx知识，Nginx现在几乎是众多大型网站的必用技术，一名合格的前端工程师，最好能用 Nginx 实现请求过滤、配置 gzip、负载均衡等需求。</p><blockquote><p><a href="https://juejin.cn/post/6844903793918738440" target="_blank" rel="noopener noreferrer">https://juejin.cn/post/6844903793918738440<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>3）猴子都能懂 Git 入门，Git 是一个开源的分布式版本控制系统，用于敏捷高效地处理任何或大或小的项目，那么这份教程可以说是通俗易懂。</p><blockquote><p><a href="https://backlog.com/git-tutorial/cn/" target="_blank" rel="noopener noreferrer">https://backlog.com/git-tutorial/cn/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><h3 id="运行环境" tabindex="-1"><a class="header-anchor" href="#运行环境" aria-hidden="true">#</a> 运行环境</h3><p>1）图解浏览器的基本工作原理，这篇文章图文并茂，里面还有一些质量非常高的视频，帮助前端工程师理解浏览器的工作原理，以及了解从在浏览器地址栏中输入 URL 到页面展现的短短几秒内浏览器究竟做了什么等等。</p><blockquote><p><a href="https://zhuanlan.zhihu.com/p/47407398" target="_blank" rel="noopener noreferrer">https://zhuanlan.zhihu.com/p/47407398<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>2）七天学会 Node.js，这是一份 Node.js 的新手入门教程，涵盖了使用Node.js开发各种程序所必要的知识点。</p><blockquote><p><a href="http://nqdeng.github.io/7-days-nodejs/" target="_blank" rel="noopener noreferrer">http://nqdeng.github.io/7-days-nodejs/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><h3 id="项目与业务" tabindex="-1"><a class="header-anchor" href="#项目与业务" aria-hidden="true">#</a> 项目与业务</h3><p>1）📚《高性能网站建设指南》，这本书介绍了网站性能问题的现状、产生的原因，以及改善或解决性能问题的原则、技术技巧和最佳实践</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/qianduan-92d3c42c-c453-473f-aefc-9137c93a939d.png" alt=""></p><p>2）深入了解前端监控原理，这篇文章主要讲了如何进行数据采集和数据上报。</p><blockquote><p><a href="https://juejin.cn/post/6899430989404045320" target="_blank" rel="noopener noreferrer">https://juejin.cn/post/6899430989404045320<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>3）5 分钟撸一个前端性能监控工具，这篇文章主要对两个指标进行了监控：页面加载时间和资源请求时间。</p><blockquote><p><a href="https://juejin.cn/post/6844903662020460552" target="_blank" rel="noopener noreferrer">https://juejin.cn/post/6844903662020460552<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>4）常见六大Web安全攻防解析，这篇文章分析了 XSS、CSRF、点击劫持、URL跳转漏洞、SQL注入、OS命令注入攻击等 6 种常见的攻击类型和防御方法，来更好的保护我们的数据。</p><blockquote><p><a href="https://github.com/ljianshu/Blog/issues/56" target="_blank" rel="noopener noreferrer">https://github.com/ljianshu/Blog/issues/56<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><h3 id="计算机基础" tabindex="-1"><a class="header-anchor" href="#计算机基础" aria-hidden="true">#</a> 计算机基础</h3><p>1）大前端开发者需要了解的基础编译原理和语言知识</p><blockquote><p><a href="https://zhuanlan.zhihu.com/p/27554023" target="_blank" rel="noopener noreferrer">https://zhuanlan.zhihu.com/p/27554023<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>2）📚《图解HTTP》，前端工程师对网络协议如果能掌握的比较透彻的话，对整体前后端的沟通是非常有帮助的。像 TCP/IP网络协议、三次握手和四次挥手、DNS的作用、CDN的作用和原理、HTTP、HTTPS、WebSocket 等等这些知识点，我认为都是一名合格的前端工程师应该掌握的。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/qianduan-ae981ec4-ea98-4bb1-a1eb-d8a21a9648cb.png" alt=""></p><p>3）JavaScript 实现的算法和数据结构，附详细解释和刷题指南。大部分前端工程师对数据结构与算法这部分知识都有些欠缺，如果想要突破更高的天花板，这部分知识是必不可少的，非常有用！</p><blockquote><p><a href="https://github.com/ConardLi/awesome-coding-js" target="_blank" rel="noopener noreferrer">https://github.com/ConardLi/awesome-coding-js<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></blockquote><p>更多前端的学习资料，可以直接戳我整理的这个 GitHub/码云仓库——📚程序员必读书单整理，附下载地址，里面有大量的前端学习资料。</p><ul><li>GitHub 地址：<a href="https://github.com/itwanger/JavaBooks#javascript" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/JavaBooks<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li>码云地址：<a href="https://gitee.com/itwanger/JavaBooks#javascript" target="_blank" rel="noopener noreferrer">https://gitee.com/itwanger/JavaBooks<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xuexiluxian/qianduan-books.jpg" alt=""></p><p>简单罗列一下：</p><ul><li>《JavaScript王者归来》.(月影)扫描版</li><li>你不知道的JavaScript</li><li>实战ES2015深入JavaScript现代应用开发-扫描版</li><li>数据结构与算法JavaScript描述</li><li>JavaScript DOM编程艺术 第2版(Jeremy Keith等)</li><li>JavaScript从入门到精通</li><li>JavaScript启示录</li><li>JavaScript异步编程</li><li>JavaScript语言精粹</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/xingbiaogongzhonghao.png" alt=""></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/xuexiluxian/qianduan.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 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01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月17日</span><meta property="datePublished" content="2022-03-17T00:00:00.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="true" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 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40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 6 分钟</span><meta property="timeRequired" content="PT6M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/zhishixingqiu/#一、什么是知识星球" class="router-link-active router-link-exact-active toc-link level3">一、什么是知识星球</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/zhishixingqiu/#二、为什么要做知识星球" class="router-link-active router-link-exact-active toc-link level3">二、为什么要做知识星球？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/zhishixingqiu/#三、星球能为你提供什么" class="router-link-active router-link-exact-active toc-link level3">三、星球能为你提供什么？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/zhishixingqiu/#四、如何加入" class="router-link-active router-link-exact-active toc-link level3">四、如何加入？</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="今天-我决定干件大事" tabindex="-1"><a class="header-anchor" href="#今天-我决定干件大事" aria-hidden="true">#</a> 今天，我决定干件大事！</h1><p>大家好，我是二哥呀。在准备了 3 个多月后，我终于决定在今天搞一件大事：<strong>正式开放我的编程知识星球（Java 程序员进阶之路）</strong>！</p><p>这是一个Java 学习指南+编程实战的学习宝地，可以<strong>帮助你提高编程能力、养成好的学习习惯、找到志同道合的学习伙伴、拿到更好的 Offer</strong>。</p><p>对于大多数人来说，惰性是与生俱来的，那么当你处在这样一个积极的学习氛围当中，就很容易受到感染，每天不认真学习点，就总会感觉懊恼。</p><p>反正我自己就是这么一个体会，每天看到小伙伴们在群里打卡，自己总感觉不好好学习就对不起自己——卷的味道就有了呀。</p><p>可能有些小伙伴还不太了解什么是知识星球，这里简单给大家介绍下。</p><h3 id="一、什么是知识星球" tabindex="-1"><a class="header-anchor" href="#一、什么是知识星球" aria-hidden="true">#</a> 一、什么是知识星球</h3><p>简单来说，知识星球就是一个私密的交流圈子，一开始真的就叫小密圈，主要用途就是把读者和知识创作者链接起来。</p><p>相比微信群或者QQ群，知识星球的内容更容易沉淀，信息管理也更高效。</p><p>在星球里，你除了可以享用星主二哥提供的<strong>1V1 专属问题答复，学习路线/学习资源/职场经验</strong>分享外，还可以共享球友的学习笔记，参与打卡挑战，和一群热爱学习的小伙伴互动交流，从此变得乐观积极，动力满满，就好像每天嚼了两块益达，吃了两根士力架一样。</p><p>学起来更带劲了，工作起来更顺心了，甚至你还会收获一份真诚的友谊。</p><p>知识星球支持手机端 APP、小程序和电脑网页端，让你随时随地分享、碎片化学习，每天认真阅读 10 分钟，一年后一定会大有所获。</p><p>手机端截图：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhishixingqiu/readme-12.png" alt=""></p><p>网页版截图：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhishixingqiu/readme-13.png" alt=""></p><h3 id="二、为什么要做知识星球" tabindex="-1"><a class="header-anchor" href="#二、为什么要做知识星球" aria-hidden="true">#</a> 二、为什么要做知识星球？</h3><ol><li><p>主要的目的就是借助自身的认知，切实地帮助到有需要的小伙伴。</p></li><li><p>为需要帮助的小伙伴提供一个可以随时提问并且能及时响应的平台。同时，我也会利用自己的影响力，邀请<strong>一批行业大咖入驻，给小伙伴提供一个近距离交流学习的机会</strong>。</p></li></ol><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhishixingqiu/readme-14.jpeg" alt=""></p><p>目前邀请到了 5 位嘉宾，都是二哥的好朋友，行业内的顶尖技术大拿：</p><ul><li>Jack_Cui，B 站知名 UP，30 万粉丝，大厂算法工程师。</li><li>Guide 哥，GitHub 星标 118k+开源项目 JavaGuide 的作者。</li><li>梦想de星空，GitHub 星标 50K+开源项目 mall 的作者。</li><li>小傅哥，畅销书《重学 Java 设计模式》的作者。</li><li>英雄哪里出来，B 站爆笑 UP，CSDN 2022 年度博客之星第一名。</li></ul><ol start="3"><li><p>把自己学到的那部分最精华的知识沉淀分享出来，让更多的小伙伴看得到。</p></li><li><p>为学习缺乏动力、缺乏目标、缺乏队友扶持的小伙伴提供一个友好的、纯粹的学习环境。</p></li></ol><p>星球原价为 <strong>99元/年</strong>，目前第一波加入的小伙伴限时优惠 <strong>30元</strong>，只需 <strong>69元一年</strong>，后面会随着人数的增多持续涨价。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhishixingqiu/readme-11.png" alt=""></p><p>名额有限，先到先得，<strong>仅限这一波就恢复原价</strong>，请长按下面的海报扫码加入：</p><h3 id="三、星球能为你提供什么" tabindex="-1"><a class="header-anchor" href="#三、星球能为你提供什么" aria-hidden="true">#</a> 三、星球能为你提供什么？</h3><p>加入星主二哥的星球后，你将获得：</p><p><strong>1. 免费下载海量编程学习资料</strong>，包括星主二哥的原创学习资料，数千本个方面的计算机经典电子书，为此，二哥还特意开通了 CSDN 的付费下载会员，可以说，进入星球后，几乎不用再从其他地方费劲找资源下载了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhishixingqiu/readme-15.png" alt=""></p><p><strong>2. 3 份高质量小册的永久阅读</strong>，内容涵盖编程喵实战项目开发笔记、Java面试指南、LeetCode Java 版刷题笔记等优质内容，价值远超门票！</p><ul><li>编程喵开源 Spring Boot+Vue 的前后端分离项目实战笔记，今年重点更新内容之一，后面打算B站直播写 bug，不，直播写代码，手把手教代码学编程。</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhishixingqiu/readme-16.png" alt=""></p><ul><li><strong>Java 面试指南</strong>，今年重点更新内容，涵盖面试准备篇、技术面试题篇、面经篇、职场修炼篇等等硬核内容。</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhishixingqiu/readme-17.png" alt=""></p><ul><li>LeetCode 题解 Java 版（持续更新 300 道）</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhishixingqiu/readme-18.png" alt=""></p><p><strong>3. 编程喵喵🐱实战项目手把手教，带你成为一名公司不可或缺的技术干将</strong>。我们来看一下后端的技术栈和前端的技术栈，主流技术一网打尽。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhishixingqiu/readme-19.png" alt=""></p><ol start="4"><li>一对一免费提问交流（有问题你尽管问，回答绝对走心干货，从此不再迷茫彷徨，毕竟二哥也是被读者尊称为“人生导师”的男人）。</li></ol><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhishixingqiu/readme-20.png" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhishixingqiu/readme-21.png" alt=""></p><ol start="5"><li><p>免费的简历修改服务（毕竟简历就是捞面试的敲门砖，一份优质的简历对整个职业生涯至关重要）。</p></li><li><p>海量编程资源分享，拓展你的认知边界，提高你的编程能力，让你每天都能进步亿点点。</p></li><li><p>读书交流、学习交流，让我们一起构建一个纯粹的学习交流社群。</p></li><li><p>不定期福利：促学计划、节日抽奖、纸质书/付费专栏送送送。</p></li></ol><p>已经有球友拿到了之前的赠书哈。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhishixingqiu/readme-22.png" alt=""></p><h3 id="四、如何加入" tabindex="-1"><a class="header-anchor" href="#四、如何加入" aria-hidden="true">#</a> 四、如何加入？</h3><p>星球的定价为 <strong>99元/年</strong>，目前第一波加入的小伙伴限时优惠 <strong>30元</strong>，只需 <strong>69元一年</strong>，后面会随着人数的增多持续涨价。</p><p>名额有限，先到先得，<strong>仅限这一波就恢复原价</strong>，请长按下面的海报扫码加入（早买早享受，还可以抢到前排编号）。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhishixingqiu/readme-11.png" alt=""></p><p>进入星球后，可以为自己制定一个目标，比如说多长时间内要加入某某心仪的公司，或者达成某某值得炫耀的成就（一定要是还算有点挑战性的目标）。</p><p>如果你能按期达成你的目标，我会将星球的门票退还给你。</p><p>进入星球后，你还可以添加我的微信，加入星球专属的交流群，非诚勿扰！</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhishixingqiu/readme-25.png" alt=""></p><p>亲眼目睹下我们每天的欢乐，不，每天求知的态度。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhishixingqiu/readme-23.png" alt=""></p><p><strong>真诚欢迎想要进阶提升的小伙伴加入星球一起交流，真心希望能帮助到更多的小伙伴</strong>。</p><p><strong>加入星球后记得看置顶主题，你会发现这票价是真的值！</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhishixingqiu/readme-24.png" alt=""></p><p>看到这就别犹豫了，原价 99 元，限时优惠 69 元，你买不了吃亏，买不了上当，却能买到一颗永不倦怠的心，以及那种就像你跑去图书馆学习的仪式感，学习氛围不一样，学习的效率也就大有改观。</p><p><em>没有什么使我停留——除了目的，纵然岸旁有玫瑰、有绿荫、有宁静的港湾，我是不系之舟</em></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a 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aria-label="四、如何加入？"><!---->四、如何加入？<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->沉默王二的专属知识星球-Java程序员进阶之路</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="true" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><span class="origin" pageview="false" pure="false">原创</span><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="true" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月17日</span><meta property="datePublished" content="2022-03-17T00:00:00.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="true" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category4" role>知识星球</li><li class="category category0" role>Java核心</li><li class="category category5" role>Java企业级开发</li><li class="category category8" role>联系作者</li><li class="category category4" role>求职面试</li><li class="category category2" role>学习资源</li><li class="category category3" role>知识库搭建历程</li><li class="category category6" role>数据库</li><meta property="articleSection" content="知识星球,Java核心,Java企业级开发,联系作者,求职面试,学习资源,知识库搭建历程,数据库"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="true" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 64.286-64.285 64.286 28.828 64.286 64.285-28.829 64.286-64.286 64.286z"></path></svg><ul class="tags-wrapper"><li class="tag tag4" role>知识星球</li><li class="tag tag4" role>Java</li><li class="tag tag4" role>心路历程</li><li class="tag tag7" role>背诵版八股文</li></ul><meta property="keywords" content="知识星球,Java,心路历程,背诵版八股文"></span><span class="reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="down" isoriginal="true" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 6 分钟</span><meta property="timeRequired" content="PT6M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/zhishixingqiu/#一、什么是知识星球" class="router-link-active router-link-exact-active toc-link level3">一、什么是知识星球</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/zhishixingqiu/#二、为什么要做知识星球" class="router-link-active router-link-exact-active toc-link level3">二、为什么要做知识星球？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/zhishixingqiu/#三、星球能为你提供什么" class="router-link-active router-link-exact-active toc-link level3">三、星球能为你提供什么？</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/zhishixingqiu/#四、如何加入" class="router-link-active router-link-exact-active toc-link level3">四、如何加入？</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><p>大家好，我是二哥呀。在准备了 3 个多月后，我终于决定在今天搞一件大事：<strong>正式开放我的编程知识星球（Java 程序员进阶之路）</strong>！</p><p>这是一个Java 学习指南+编程实战的学习宝地，可以<strong>帮助你提高编程能力、养成好的学习习惯、找到志同道合的学习伙伴、拿到更好的 Offer</strong>。</p><p>对于大多数人来说，惰性是与生俱来的，那么当你处在这样一个积极的学习氛围当中，就很容易受到感染，每天不认真学习点，就总会感觉懊恼。</p><p>反正我自己就是这么一个体会，每天看到小伙伴们在群里打卡，自己总感觉不好好学习就对不起自己——卷的味道就有了呀。</p><p>可能有些小伙伴还不太了解什么是知识星球，这里简单给大家介绍下。</p><h3 id="一、什么是知识星球" tabindex="-1"><a class="header-anchor" href="#一、什么是知识星球" aria-hidden="true">#</a> 一、什么是知识星球</h3><p>简单来说，知识星球就是一个私密的交流圈子，一开始真的就叫小密圈，主要用途就是把读者和知识创作者链接起来。</p><p>相比微信群或者QQ群，知识星球的内容更容易沉淀，信息管理也更高效。</p><p>在星球里，你除了可以享用星主二哥提供的<strong>1V1 专属问题答复，学习路线/学习资源/职场经验</strong>分享外，还可以共享球友的学习笔记，参与打卡挑战，和一群热爱学习的小伙伴互动交流，从此变得乐观积极，动力满满，就好像每天嚼了两块益达，吃了两根士力架一样。</p><p>学起来更带劲了，工作起来更顺心了，甚至你还会收获一份真诚的友谊。</p><p>知识星球支持手机端 APP、小程序和电脑网页端，让你随时随地分享、碎片化学习，每天认真阅读 10 分钟，一年后一定会大有所获。</p><p>手机端截图：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhishixingqiu/readme-12.png" alt=""></p><p>网页版截图：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhishixingqiu/readme-13.png" alt=""></p><h3 id="二、为什么要做知识星球" tabindex="-1"><a class="header-anchor" href="#二、为什么要做知识星球" aria-hidden="true">#</a> 二、为什么要做知识星球？</h3><ol><li><p>主要的目的就是借助自身的认知，切实地帮助到有需要的小伙伴。</p></li><li><p>为需要帮助的小伙伴提供一个可以随时提问并且能及时响应的平台。同时，我也会利用自己的影响力，邀请<strong>一批行业大咖入驻，给小伙伴提供一个近距离交流学习的机会</strong>。</p></li></ol><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhishixingqiu/readme-14.jpeg" alt=""></p><p>目前邀请到了 5 位嘉宾，都是二哥的好朋友，行业内的顶尖技术大拿：</p><ul><li>Jack_Cui，B 站知名 UP，30 万粉丝，大厂算法工程师。</li><li>Guide 哥，GitHub 星标 118k+开源项目 JavaGuide 的作者。</li><li>梦想de星空，GitHub 星标 50K+开源项目 mall 的作者。</li><li>小傅哥，畅销书《重学 Java 设计模式》的作者。</li><li>英雄哪里出来，B 站爆笑 UP，CSDN 2022 年度博客之星第一名。</li></ul><ol start="3"><li><p>把自己学到的那部分最精华的知识沉淀分享出来，让更多的小伙伴看得到。</p></li><li><p>为学习缺乏动力、缺乏目标、缺乏队友扶持的小伙伴提供一个友好的、纯粹的学习环境。</p></li></ol><p>星球原价为 <strong>99元/年</strong>，目前第一波加入的小伙伴限时优惠 <strong>30元</strong>，只需 <strong>69元一年</strong>，后面会随着人数的增多持续涨价。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhishixingqiu/readme-11.png" alt=""></p><p>名额有限，先到先得，<strong>仅限这一波就恢复原价</strong>，请长按下面的海报扫码加入：</p><h3 id="三、星球能为你提供什么" tabindex="-1"><a class="header-anchor" href="#三、星球能为你提供什么" aria-hidden="true">#</a> 三、星球能为你提供什么？</h3><p>加入星主二哥的星球后，你将获得：</p><p><strong>1. 免费下载海量编程学习资料</strong>，包括星主二哥的原创学习资料，数千本个方面的计算机经典电子书，为此，二哥还特意开通了 CSDN 的付费下载会员，可以说，进入星球后，几乎不用再从其他地方费劲找资源下载了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhishixingqiu/readme-15.png" alt=""></p><p><strong>2. 3 份高质量小册的永久阅读</strong>，内容涵盖编程喵实战项目开发笔记、Java面试指南、LeetCode Java 版刷题笔记等优质内容，价值远超门票！</p><ul><li>编程喵开源 Spring Boot+Vue 的前后端分离项目实战笔记，今年重点更新内容之一，后面打算B站直播写 bug，不，直播写代码，手把手教代码学编程。</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhishixingqiu/readme-16.png" alt=""></p><ul><li><strong>Java 面试指南</strong>，今年重点更新内容，涵盖面试准备篇、技术面试题篇、面经篇、职场修炼篇等等硬核内容。</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhishixingqiu/readme-17.png" alt=""></p><ul><li>LeetCode 题解 Java 版（持续更新 300 道）</li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhishixingqiu/readme-18.png" alt=""></p><p><strong>3. 编程喵喵🐱实战项目手把手教，带你成为一名公司不可或缺的技术干将</strong>。我们来看一下后端的技术栈和前端的技术栈，主流技术一网打尽。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhishixingqiu/readme-19.png" alt=""></p><ol start="4"><li>一对一免费提问交流（有问题你尽管问，回答绝对走心干货，从此不再迷茫彷徨，毕竟二哥也是被读者尊称为“人生导师”的男人）。</li></ol><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhishixingqiu/readme-20.png" alt=""></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhishixingqiu/readme-21.png" alt=""></p><ol start="5"><li><p>免费的简历修改服务（毕竟简历就是捞面试的敲门砖，一份优质的简历对整个职业生涯至关重要）。</p></li><li><p>海量编程资源分享，拓展你的认知边界，提高你的编程能力，让你每天都能进步亿点点。</p></li><li><p>读书交流、学习交流，让我们一起构建一个纯粹的学习交流社群。</p></li><li><p>不定期福利：促学计划、节日抽奖、纸质书/付费专栏送送送。</p></li></ol><p>已经有球友拿到了之前的赠书哈。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhishixingqiu/readme-22.png" alt=""></p><h3 id="四、如何加入" tabindex="-1"><a class="header-anchor" href="#四、如何加入" aria-hidden="true">#</a> 四、如何加入？</h3><p>星球的定价为 <strong>99元/年</strong>，目前第一波加入的小伙伴限时优惠 <strong>30元</strong>，只需 <strong>69元一年</strong>，后面会随着人数的增多持续涨价。</p><p>名额有限，先到先得，<strong>仅限这一波就恢复原价</strong>，请长按下面的海报扫码加入（早买早享受，还可以抢到前排编号）。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhishixingqiu/readme-11.png" alt=""></p><p>进入星球后，可以为自己制定一个目标，比如说多长时间内要加入某某心仪的公司，或者达成某某值得炫耀的成就（一定要是还算有点挑战性的目标）。</p><p>如果你能按期达成你的目标，我会将星球的门票退还给你。</p><p>进入星球后，你还可以添加我的微信，加入星球专属的交流群，非诚勿扰！</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhishixingqiu/readme-25.png" alt=""></p><p>亲眼目睹下我们每天的欢乐，不，每天求知的态度。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhishixingqiu/readme-23.png" alt=""></p><p><strong>真诚欢迎想要进阶提升的小伙伴加入星球一起交流，真心希望能帮助到更多的小伙伴</strong>。</p><p><strong>加入星球后记得看置顶主题，你会发现这票价是真的值！</strong></p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhishixingqiu/readme-24.png" alt=""></p><p>看到这就别犹豫了，原价 99 元，限时优惠 69 元，你买不了吃亏，买不了上当，却能买到一颗永不倦怠的心，以及那种就像你跑去图书馆学习的仪式感，学习氛围不一样，学习的效率也就大有改观。</p><p><em>没有什么使我停留——除了目的，纵然岸旁有玫瑰、有绿荫、有宁静的港湾，我是不系之舟</em></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/zhishixingqiu/readme.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 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class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/zhishixingqiu/" class="nav-link sidebar-link sidebar-page" aria-label="沉默王二的专属知识星球"><!---->沉默王二的专属知识星球<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->《Java 面试指南》</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a 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40.31H593.927c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.31-40.31zM730.22 920.502H623.926c-40.925 0-74.22-33.388-74.22-74.425V623.992c0-41.038 33.387-74.424 74.425-74.424h222.085c41.038 0 74.424 33.226 74.424 74.067v114.233c0 10.244-8.304 18.548-18.547 18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category4" role>知识星球</li><meta property="articleSection" content="知识星球"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 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11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 3 分钟</span><meta property="timeRequired" content="PT3M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/zhishixingqiu/java-mianshi-zhinan.html#一、内容概览" class="router-link-active router-link-exact-active toc-link level2">一、内容概览</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/zhishixingqiu/java-mianshi-zhinan.html#_01、面试准备篇" class="router-link-active router-link-exact-active toc-link level3">01、面试准备篇</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/zhishixingqiu/java-mianshi-zhinan.html#_02、技术面试篇" class="router-link-active router-link-exact-active toc-link level3">02、技术面试篇</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/zhishixingqiu/java-mianshi-zhinan.html#_03、职场修炼篇" class="router-link-active router-link-exact-active toc-link level3">03、职场修炼篇</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/zhishixingqiu/java-mianshi-zhinan.html#二、星球其他资源" class="router-link-active router-link-exact-active toc-link level2">二、星球其他资源</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/zhishixingqiu/java-mianshi-zhinan.html#三、星球限时优惠" class="router-link-active router-link-exact-active toc-link level2">三、星球限时优惠</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><p>大家好，我是二哥呀。</p><p>一到金三银四/金九银十的面试季节，二哥就忙得像狗一样，因为经常要回答小伙伴们提出的面试相关问题，以及修改简历。</p><p>说实话，累是真的累，但收获也是满满当当的。这不，我就利用业余时间沉淀下来了这份沉甸甸的《Java 面试指南》：</p><ul><li>十多篇文章手把手教你如何准备面试。</li><li>全面且硬核的 Java 面试题。</li><li>职场修炼手册，助力你快速成为公司不可或缺的一员。</li></ul><h2 id="一、内容概览" tabindex="-1"><a class="header-anchor" href="#一、内容概览" aria-hidden="true">#</a> 一、内容概览</h2><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhuanlan/java-mianshi-zhinan-1.png" alt=""></p><h3 id="_01、面试准备篇" tabindex="-1"><a class="header-anchor" href="#_01、面试准备篇" aria-hidden="true">#</a> 01、面试准备篇</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhuanlan/java-mianshi-zhinan-2.png" alt=""></p><p>如果你能认真按照我这份攻略来准备面试，那绝对事半功倍，面试取得的战果绝对超出你的预期。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhuanlan/java-mianshi-zhinan-3.png" alt=""></p><h3 id="_02、技术面试篇" tabindex="-1"><a class="header-anchor" href="#_02、技术面试篇" aria-hidden="true">#</a> 02、技术面试篇</h3><p>技术面试篇里也会给大家带来面试当中常见的问题解答，帮助你的面试当中获得更优异的表现。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhuanlan/java-mianshi-zhinan-4.png" alt=""></p><h3 id="_03、职场修炼篇" tabindex="-1"><a class="header-anchor" href="#_03、职场修炼篇" aria-hidden="true">#</a> 03、职场修炼篇</h3><p>当你参加工作后，该如何提高编程能力、提高工作表现、提高个人硬实力呢？职场修炼篇里也会给大家带来硬核的职场建议，十年多的职场经验倾囊相授。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhuanlan/java-mianshi-zhinan-5.png" alt=""></p><h2 id="二、星球其他资源" tabindex="-1"><a class="header-anchor" href="#二、星球其他资源" aria-hidden="true">#</a> 二、星球其他资源</h2><p><strong>1. 免费下载海量编程学习资料</strong>，包括星主二哥的原创学习资料，数千本个方面的计算机经典电子书，为此，二哥还特意开通了 CSDN 的付费下载会员，可以说，进入星球后，几乎不用再从其他地方费劲找资源下载了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhuanlan/java-mianshi-zhinan-6.png" alt=""></p><p><strong>2. 编程喵喵🐱实战项目手把手教，带你成为一名公司不可或缺的技术干将</strong>。我们来看一下后端的技术栈和前端的技术栈，主流技术一网打尽。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhuanlan/java-mianshi-zhinan-7.png" alt=""></p><ol start="3"><li><p>一对一免费提问交流（有问题你尽管问，回答绝对走心干货，从此不再迷茫彷徨）。</p></li><li><p>免费的简历修改服务（毕竟简历就是捞面试的敲门砖，一份优质的简历对整个职业生涯至关重要）。</p></li><li><p>海量编程资源分享，拓展你的认知边界，提高你的编程能力，让你每天都能进步亿点点。</p></li><li><p>读书交流、学习交流，让我们一起构建一个纯粹的学习交流社群。</p></li><li><p>不定期福利：促学计划、节日抽奖、纸质书/付费专栏送送送。</p></li></ol><h2 id="三、星球限时优惠" tabindex="-1"><a class="header-anchor" href="#三、星球限时优惠" aria-hidden="true">#</a> 三、星球限时优惠</h2><p>星球的定价为 <strong>99元/年</strong>，目前第一波加入的小伙伴限时优惠 <strong>30元</strong>，只需 <strong>69元一年</strong>，后面会随着人数的增多持续涨价。</p><p>名额有限，先到先得，<strong>仅限这一波就恢复原价</strong>，请长按下面的海报扫码加入（早买早享受，还可以抢到前排编号）。</p><p><img src="http://cdn.tobebetterjavaer.com/itwanger/zhishixingqiu-youhui30yuan.png" alt=""></p><p>透露一个消息，星主二哥去年一共在朋友圈和公众号送出去了近 300 本纸质书（技术书定价一般都是 100 元走上），今年计划全部从<strong>星球内部送，所以幸运的小伙伴直接可以白嫖星球一整年</strong>。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhishixingqiu/readme-10.png" alt="这是一部分的记录表"></p><p>进入星球后，可以为自己制定一个目标，比如说多长时间内要加入某某心仪的公司，或者达成某某值得炫耀的成就（一定要是还算有点挑战性的目标）。</p><p>如果你能按期达成你的目标，我会将星球的门票退还给你。</p><p><strong>真诚欢迎想要进阶提升的小伙伴加入星球一起交流，真心希望能帮助到更多的小伙伴</strong>。</p><p><strong>加入星球后记得看置顶主题，你会发现这票价是真的值！</strong></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/zhishixingqiu/java-mianshi-zhinan.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 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class="theme-hope-content"><p>大家好，我是二哥呀。</p><p>一到金三银四/金九银十的面试季节，二哥就忙得像狗一样，因为经常要回答小伙伴们提出的面试相关问题，以及修改简历。</p><p>说实话，累是真的累，但收获也是满满当当的。这不，我就利用业余时间沉淀下来了这份沉甸甸的《Java 面试指南》：</p><ul><li>十多篇文章手把手教你如何准备面试。</li><li>全面且硬核的 Java 面试题。</li><li>职场修炼手册，助力你快速成为公司不可或缺的一员。</li></ul><h2 id="一、内容概览" tabindex="-1"><a class="header-anchor" href="#一、内容概览" aria-hidden="true">#</a> 一、内容概览</h2><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhuanlan/java-mianshi-zhinan-1.png" alt=""></p><h3 id="_01、面试准备篇" tabindex="-1"><a class="header-anchor" href="#_01、面试准备篇" aria-hidden="true">#</a> 01、面试准备篇</h3><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhuanlan/java-mianshi-zhinan-2.png" alt=""></p><p>如果你能认真按照我这份攻略来准备面试，那绝对事半功倍，面试取得的战果绝对超出你的预期。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhuanlan/java-mianshi-zhinan-3.png" alt=""></p><h3 id="_02、技术面试篇" tabindex="-1"><a class="header-anchor" href="#_02、技术面试篇" aria-hidden="true">#</a> 02、技术面试篇</h3><p>技术面试篇里也会给大家带来面试当中常见的问题解答，帮助你的面试当中获得更优异的表现。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhuanlan/java-mianshi-zhinan-4.png" alt=""></p><h3 id="_03、职场修炼篇" tabindex="-1"><a class="header-anchor" href="#_03、职场修炼篇" aria-hidden="true">#</a> 03、职场修炼篇</h3><p>当你参加工作后，该如何提高编程能力、提高工作表现、提高个人硬实力呢？职场修炼篇里也会给大家带来硬核的职场建议，十年多的职场经验倾囊相授。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhuanlan/java-mianshi-zhinan-5.png" alt=""></p><h2 id="二、星球其他资源" tabindex="-1"><a class="header-anchor" href="#二、星球其他资源" aria-hidden="true">#</a> 二、星球其他资源</h2><p><strong>1. 免费下载海量编程学习资料</strong>，包括星主二哥的原创学习资料，数千本个方面的计算机经典电子书，为此，二哥还特意开通了 CSDN 的付费下载会员，可以说，进入星球后，几乎不用再从其他地方费劲找资源下载了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhuanlan/java-mianshi-zhinan-6.png" alt=""></p><p><strong>2. 编程喵喵🐱实战项目手把手教，带你成为一名公司不可或缺的技术干将</strong>。我们来看一下后端的技术栈和前端的技术栈，主流技术一网打尽。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhuanlan/java-mianshi-zhinan-7.png" alt=""></p><ol start="3"><li><p>一对一免费提问交流（有问题你尽管问，回答绝对走心干货，从此不再迷茫彷徨）。</p></li><li><p>免费的简历修改服务（毕竟简历就是捞面试的敲门砖，一份优质的简历对整个职业生涯至关重要）。</p></li><li><p>海量编程资源分享，拓展你的认知边界，提高你的编程能力，让你每天都能进步亿点点。</p></li><li><p>读书交流、学习交流，让我们一起构建一个纯粹的学习交流社群。</p></li><li><p>不定期福利：促学计划、节日抽奖、纸质书/付费专栏送送送。</p></li></ol><h2 id="三、星球限时优惠" tabindex="-1"><a class="header-anchor" href="#三、星球限时优惠" aria-hidden="true">#</a> 三、星球限时优惠</h2><p>星球的定价为 <strong>99元/年</strong>，目前第一波加入的小伙伴限时优惠 <strong>30元</strong>，只需 <strong>69元一年</strong>，后面会随着人数的增多持续涨价。</p><p>名额有限，先到先得，<strong>仅限这一波就恢复原价</strong>，请长按下面的海报扫码加入（早买早享受，还可以抢到前排编号）。</p><p><img src="http://cdn.tobebetterjavaer.com/itwanger/zhishixingqiu-youhui30yuan.png" alt=""></p><p>透露一个消息，星主二哥去年一共在朋友圈和公众号送出去了近 300 本纸质书（技术书定价一般都是 100 元走上），今年计划全部从<strong>星球内部送，所以幸运的小伙伴直接可以白嫖星球一整年</strong>。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zhishixingqiu/readme-10.png" alt="这是一部分的记录表"></p><p>进入星球后，可以为自己制定一个目标，比如说多长时间内要加入某某心仪的公司，或者达成某某值得炫耀的成就（一定要是还算有点挑战性的目标）。</p><p>如果你能按期达成你的目标，我会将星球的门票退还给你。</p><p><strong>真诚欢迎想要进阶提升的小伙伴加入星球一起交流，真心希望能帮助到更多的小伙伴</strong>。</p><p><strong>加入星球后记得看置顶主题，你会发现这票价是真的值！</strong></p></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/itwanger/toBeBetterJavaer/edit/master/docs/zhishixingqiu/java-mianshi-zhinan.md" rel="noopener noreferrer" target="_blank" aria-label="编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 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class="sidebar-sub-header"><a aria-current="page" href="/zookeeper/jibenjieshao.html#七、序列化方式" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="七、序列化方式"><!---->七、序列化方式<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/zookeeper/jibenjieshao.html#八、集群" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="八、集群"><!---->八、集群<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/zookeeper/jibenjieshao.html#九、zab协议" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="九、ZAB协议"><!---->九、ZAB协议<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/zookeeper/jibenjieshao.html#十、日志清理" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="十、日志清理"><!---->十、日志清理<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/zookeeper/jibenjieshao.html#十一、实现分布式锁" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="十一、实现分布式锁"><!---->十一、实现分布式锁<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/zookeeper/jibenjieshao.html#十二、实现分布式id" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="十二、实现分布式ID"><!---->十二、实现分布式ID<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/zookeeper/jibenjieshao.html#十三、实现负载均衡" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="十三、实现负载均衡"><!---->十三、实现负载均衡<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/zookeeper/jibenjieshao.html#十四、开源框架使用案例" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="十四、开源框架使用案例"><!---->十四、开源框架使用案例<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/microservice/api-wangguan.html" class="nav-link sidebar-link sidebar-page" aria-label="聊聊微服务网关"><!---->聊聊微服务网关<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.8 消息队列</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->可能是把ZooKeeper概念讲的最清楚的一篇文章</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon 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18.548s-18.548-8.304-18.548-18.548V623.635c0-20.388-16.746-36.974-37.33-36.974H624.13c-20.585 0-37.331 16.747-37.331 37.33v222.086c0 20.585 16.654 37.331 37.126 37.331H730.22c10.243 0 18.547 8.304 18.547 18.547 0 10.244-8.304 18.547-18.547 18.547z"></path></svg><ul class="categories-wrapper"><li class="category category5" role>Java企业级开发</li><meta property="articleSection" content="Java企业级开发"></ul></span><span aria-label="标签🏷" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon tag-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="tag icon"><path d="M939.902 458.563L910.17 144.567c-1.507-16.272-14.465-29.13-30.737-30.737L565.438 84.098h-.402c-3.215 0-5.726 1.005-7.634 2.913l-470.39 470.39a10.004 10.004 0 000 14.164l365.423 365.424c1.909 1.908 4.42 2.913 7.132 2.913s5.223-1.005 7.132-2.913l470.39-470.39c2.01-2.11 3.014-5.023 2.813-8.036zm-240.067-72.121c-35.458 0-64.286-28.828-64.286-64.286s28.828-64.285 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213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 53 分钟</span><meta property="timeRequired" content="PT53M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/zookeeper/jibenjieshao.html#一、基本介绍" class="router-link-active router-link-exact-active toc-link level2">一、基本介绍</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/zookeeper/jibenjieshao.html#二、数据模型" class="router-link-active router-link-exact-active toc-link level2">二、数据模型</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/zookeeper/jibenjieshao.html#三、数据存储" class="router-link-active router-link-exact-active toc-link level2">三、数据存储</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/zookeeper/jibenjieshao.html#四、watch机制" class="router-link-active router-link-exact-active toc-link level2">四、Watch机制</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/zookeeper/jibenjieshao.html#五、会话机制" class="router-link-active router-link-exact-active toc-link level2">五、会话机制</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/zookeeper/jibenjieshao.html#六、acl权限" class="router-link-active router-link-exact-active toc-link level2">六、ACL权限</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/zookeeper/jibenjieshao.html#七、序列化方式" class="router-link-active router-link-exact-active toc-link level2">七、序列化方式</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/zookeeper/jibenjieshao.html#八、集群" class="router-link-active router-link-exact-active toc-link level2">八、集群</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/zookeeper/jibenjieshao.html#九、zab协议" class="router-link-active router-link-exact-active toc-link level2">九、ZAB协议</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/zookeeper/jibenjieshao.html#十、日志清理" class="router-link-active router-link-exact-active toc-link level2">十、日志清理</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/zookeeper/jibenjieshao.html#十一、实现分布式锁" class="router-link-active router-link-exact-active toc-link level2">十一、实现分布式锁</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/zookeeper/jibenjieshao.html#十二、实现分布式id" class="router-link-active router-link-exact-active toc-link level2">十二、实现分布式ID</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/zookeeper/jibenjieshao.html#十三、实现负载均衡" class="router-link-active router-link-exact-active toc-link level2">十三、实现负载均衡</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/zookeeper/jibenjieshao.html#十四、开源框架使用案例" class="router-link-active router-link-exact-active toc-link level2">十四、开源框架使用案例</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="可能是把zookeeper概念讲的最清楚的一篇文章" tabindex="-1"><a class="header-anchor" href="#可能是把zookeeper概念讲的最清楚的一篇文章" aria-hidden="true">#</a> 可能是把ZooKeeper概念讲的最清楚的一篇文章</h1><p>整理：沉默王二，戳<a href="https://mp.weixin.qq.com/s/-evZg0epRrOr1IwQ3GJ2Zg" target="_blank" rel="noopener noreferrer">转载链接<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，作者：月伴飞鱼，戳<a href="https://mp.weixin.qq.com/s/B2ngp0q5kdWsCNH8sw_5DA" target="_blank" rel="noopener noreferrer">原文链接<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>。</p><h2 id="一、基本介绍" tabindex="-1"><a class="header-anchor" href="#一、基本介绍" aria-hidden="true">#</a> 一、基本介绍</h2><p>Apache ZooKeeper 是由Apache Hadoop的子项目发展而来，为分布式应用提供高效且可靠的分布式协调服务。</p><p>在解决分布式数据一致性方面，ZK没有直接采用Paxos算法，而是采用了ZAB（ZooKeeper Atomic Broadcast）协议。 ZK可以提供诸如数据发布/订阅、负载均衡、命名服务、分布式协调/通知，集群管理，Master选举，分布式锁，分布式队列等功能。</p><p>「它具有以下特性：」</p><ul><li>「顺序一致性」：从一个客户端发起的事务请求，最终都会严格按照其发起顺序被应用到 Zookeeper 中；</li><li>「原子性」：要么所有应用，要么不应用；不存在部分机器应用了该事务，而「另一部分没有应用」的情况；</li><li>「单一视图」：所有客户端看到的服务端数据模型都是一致的，无论客户连接的是哪个ZK服务器；</li><li>「可靠性」：一旦服务端成功应用了一个事务，则其引起的改变会一直保留，直到被另外一个事务所更改；</li><li>「实时性」：一旦一个事务被成功应用后，Zookeeper 可以保证客户端立即可以读取到这个事务变更后的最新状态的数据（「一段时间」）。</li></ul><h2 id="二、数据模型" tabindex="-1"><a class="header-anchor" href="#二、数据模型" aria-hidden="true">#</a> 二、数据模型</h2><p>ZooKeeper 中的数据模型是一种树形结构，非常像电脑中的文件系统，有一个根文件夹，下面还有很多子文件夹。</p><ul><li><p>ZooKeeper的数据模型也具有一个固定的根节点<code>（/）</code>，我们可以在根节点下创建子节点，并在子节点下继续创建下一级节点。</p></li><li><p>ZooKeeper 树中的每一层级用斜杠<code>（/）</code>分隔开，且只能用绝对路径（如<code>get /work/task</code>）的方式查询 ZooKeeper 节点，而不能使用相对路径。</p></li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zookeeper/shujumoxing-1.png" alt=""></p><p><strong>「为什么 ZooKeeper 不能采用相对路径查找节点呢？」</strong></p><blockquote><p>❝</p><p>这是因为 ZooKeeper 大多是应用场景是定位数据模型上的节点，并在相关节点上进行操作。</p><p>❞</p></blockquote><p>像这种查找与给定值相等的记录问题最适合用散列来解决。</p><p>因此 ZooKeeper 在底层实现的时候，使用了一个 hashtable，即 <code>hashtableConcurrentHashMap&lt;String, DataNode&gt; nodes</code>，用节点的完整路径来作为 key 存储节点数据。</p><p>这样就大大提高了 ZooKeeper 的性能。</p><p><strong>「节点类型」</strong></p><p>ZooKeeper 中的数据节点也分为持久节点、临时节点和有序节点三种类型：</p><blockquote><p>❝</p><p>1、持久节点</p><p>❞</p></blockquote><p>一旦将节点创建为持久节点，该数据节点会一直存储在 ZooKeeper 服务器上，即使创建该节点的客户端与服务端的会话关闭了，该节点依然不会被删除。如果我们想删除持久节点，就要显式调用 delete 函数进行删除操作。</p><blockquote><p>❝</p><p>2、临时节点</p><p>❞</p></blockquote><p>如果将节点创建为临时节点，那么该节点数据不会一直存储在 ZooKeeper 服务器上。</p><p>当创建该临时节点的客户端会话因超时或发生异常而关闭时，该节点也相应在 ZooKeeper 服务器上被删除，同样，我们可以像删除持久节点一样主动删除临时节点。</p><p>在平时的开发中，我们可以利用临时节点的这一特性来做服务器集群内机器运行情况的统计，将集群设置为<code>/servers</code>节点，并为集群下的每台服务器创建一个临时节点<code>/servers/host</code>，当服务器下线时该节点自动被删除，最后统计临时节点个数就可以知道集群中的运行情况。</p><blockquote><p>❝</p><p>3、有序节点</p><p>❞</p></blockquote><p>节点有序是说在我们创建有序节点的时候，ZooKeeper 服务器会自动使用一个单调递增的数字作为后缀，追加到我们创建节点的后边。</p><p>例如一个客户端创建了一个路径为 <code>works/task-</code>的有序节点，那么 ZooKeeper 将会生成一个序号并追加到该节点的路径后，最后该节点的路径为<code>works/task-1</code>。</p><ul><li>通过这种方式我们可以直观的查看到节点的创建顺序。</li></ul><p>ZooKeeper 中的每个节点都维护有这些内容：一个二进制数组<code>（byte data[]）</code>，用来存储节点的数据、ACL 访问控制信息、子节点数据（因为临时节点不允许有子节点，所以其子节点字段为 null），除此之外每个数据节点还有一个记录自身状态信息的字段 stat。</p><p><strong>「节点的状态结构」</strong></p><p>执行<code>stat /zk_test</code>，可以看到控制台输出了一些信息，这些就是节点状态信息。</p><p>每一个节点都有一个自己的状态属性，记录了节点本身的一些信息：</p><table><thead><tr><th><strong>「状态属性」</strong></th><th><strong>「说明」</strong></th></tr></thead><tbody><tr><td>czxid</td><td>数据节点创建时的事务 ID</td></tr><tr><td>ctime</td><td>数据节点创建时的时间</td></tr><tr><td>mzxid</td><td>数据节点最后一次更新时的事务 ID</td></tr><tr><td>mtime</td><td>数据节点最后一次更新时的时间</td></tr><tr><td>pzxid</td><td>数据节点的子节点最后一次被修改时的事务 ID</td></tr><tr><td><strong>「cversion」</strong></td><td><strong>「子节点的版本」</strong></td></tr><tr><td><strong>「version」</strong></td><td><strong>「当前节点数据的版本」</strong></td></tr><tr><td><strong>「aversion」</strong></td><td><strong>「节点的 ACL 的版本」</strong></td></tr><tr><td>ephemeralOwner</td><td>如果节点是临时节点，则表示创建该节点的会话的 SessionID；如果节点是持久节点，则该属性值为 0</td></tr><tr><td>dataLength</td><td>数据内容的长度</td></tr><tr><td>numChildren</td><td>数据节点当前的子节点个数</td></tr></tbody></table><p><strong>「数据节点的版本」</strong></p><p>在 ZooKeeper 中为数据节点引入了版本的概念，每个数据节点有 3 种类型的版本信息，对数据节点的任何更新操作都会引起版本号的变化。</p><p>ZooKeeper 的版本信息表示的是对节点数据内容、子节点信息或者是 ACL 信息的修改次数。</p><h2 id="三、数据存储" tabindex="-1"><a class="header-anchor" href="#三、数据存储" aria-hidden="true">#</a> 三、数据存储</h2><p>从存储位置上来说，事务日志和数据快照一样，都存储在本地磁盘上；而从业务角度来讲，内存数据就是我们创建数据节点、添加监控等请求时直接操作的数据。</p><p>事务日志数据主要用于记录本地事务性会话操作，用于 ZooKeeper 集群服务器之间的数据同步。</p><p>事务快照则是将内存数据持久化到本地磁盘。</p><p>❝ 这里要注意的一点是，数据快照是每间隔一段时间才把内存数据存储到本地磁盘，因此数据并不会一直与内存数据保持一致。 ❞ 在单台 ZooKeeper 服务器运行过程中因为异常而关闭时，可能会出现数据丢失等情况。</p><p>「内存数据」</p><p>ZooKeeper 的数据模型可以看作一棵树形结构，而数据节点就是这棵树上的叶子节点。</p><p>从数据存储的角度看，ZooKeeper 的数据模型是存储在内存中的。</p><p>我们可以把 ZooKeeper 的数据模型看作是存储在内存中的数据库，而这个数据库不但存储数据的节点信息，还存储每个数据节点的 ACL 权限信息以及 stat 状态信息等。</p><p>而在底层实现中，ZooKeeper 数据模型是通过 DataTree 类来定义的。 DataTree 类定义了一个 ZooKeeper 数据的内存结构。</p><p>DataTree 的内部定义类 nodes 节点类型、root 根节点信息、子节点的 WatchManager 监控信息等数据模型中的相关信息。</p><p>可以说，一个 DataTree 类定义了 ZooKeeper 内存数据的逻辑结构。</p><p>「事务日志」</p><p>为了整个 ZooKeeper 集群中数据的一致性，Leader 服务器会向 ZooKeeper 集群中的其他角色服务发送数据同步信息，在接收到数据同步信息后， ZooKeeper 集群中的 Follow 和 Observer 服务器就会进行数据同步。</p><p>❝ 而这两种角色服务器所接收到的信息就是 Leader 服务器的事务日志。 ❞ 在接收到事务日志后，并在本地服务器上执行。这种数据同步的方式，避免了直接使用实际的业务数据，减少了网络传输的开销，提升了整个 ZooKeeper 集群的执行性能。</p><h2 id="四、watch机制" tabindex="-1"><a class="header-anchor" href="#四、watch机制" aria-hidden="true">#</a> 四、Watch机制</h2><p>ZooKeeper 的客户端可以通过 Watch 机制来订阅当服务器上某一节点的数据或状态发生变化时收到相应的通知；</p><p><strong>「如何实现：」</strong></p><p>我们可以通过向 ZooKeeper 客户端的构造方法中传递 Watcher 参数的方式实现：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>new ZooKeeper(String connectString, int sessionTimeout, Watcher watcher)
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class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="八、集群"><!---->八、集群<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/zookeeper/jibenjieshao.html#九、zab协议" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="九、ZAB协议"><!---->九、ZAB协议<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/zookeeper/jibenjieshao.html#十、日志清理" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="十、日志清理"><!---->十、日志清理<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/zookeeper/jibenjieshao.html#十一、实现分布式锁" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="十一、实现分布式锁"><!---->十一、实现分布式锁<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/zookeeper/jibenjieshao.html#十二、实现分布式id" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="十二、实现分布式ID"><!---->十二、实现分布式ID<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/zookeeper/jibenjieshao.html#十三、实现负载均衡" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="十三、实现负载均衡"><!---->十三、实现负载均衡<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/zookeeper/jibenjieshao.html#十四、开源框架使用案例" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="十四、开源框架使用案例"><!---->十四、开源框架使用案例<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/microservice/api-wangguan.html" class="nav-link sidebar-link sidebar-page" aria-label="聊聊微服务网关"><!---->聊聊微服务网关<!----></a><ul 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class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->可能是把ZooKeeper概念讲的最清楚的一篇文章</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="https://tobebetterjavaer.com" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年3月8日</span><meta property="datePublished" content="2022-03-08T07:26:23.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 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content="PT53M"></span></div><hr></div><div class="toc-place-holder"><aside id="toc"><div class="toc-header">此页内容</div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/zookeeper/jibenjieshao.html#一、基本介绍" class="router-link-active router-link-exact-active toc-link level2">一、基本介绍</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/zookeeper/jibenjieshao.html#二、数据模型" class="router-link-active router-link-exact-active toc-link level2">二、数据模型</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/zookeeper/jibenjieshao.html#三、数据存储" class="router-link-active router-link-exact-active toc-link level2">三、数据存储</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/zookeeper/jibenjieshao.html#四、watch机制" class="router-link-active router-link-exact-active toc-link level2">四、Watch机制</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/zookeeper/jibenjieshao.html#五、会话机制" class="router-link-active router-link-exact-active toc-link level2">五、会话机制</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/zookeeper/jibenjieshao.html#六、acl权限" class="router-link-active router-link-exact-active toc-link level2">六、ACL权限</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/zookeeper/jibenjieshao.html#七、序列化方式" class="router-link-active router-link-exact-active toc-link level2">七、序列化方式</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/zookeeper/jibenjieshao.html#八、集群" class="router-link-active router-link-exact-active toc-link level2">八、集群</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/zookeeper/jibenjieshao.html#九、zab协议" class="router-link-active router-link-exact-active toc-link level2">九、ZAB协议</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/zookeeper/jibenjieshao.html#十、日志清理" class="router-link-active router-link-exact-active toc-link level2">十、日志清理</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/zookeeper/jibenjieshao.html#十一、实现分布式锁" class="router-link-active router-link-exact-active toc-link level2">十一、实现分布式锁</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/zookeeper/jibenjieshao.html#十二、实现分布式id" class="router-link-active router-link-exact-active toc-link level2">十二、实现分布式ID</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/zookeeper/jibenjieshao.html#十三、实现负载均衡" class="router-link-active router-link-exact-active toc-link level2">十三、实现负载均衡</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/zookeeper/jibenjieshao.html#十四、开源框架使用案例" class="router-link-active router-link-exact-active toc-link level2">十四、开源框架使用案例</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h1 id="可能是把zookeeper概念讲的最清楚的一篇文章" tabindex="-1"><a class="header-anchor" href="#可能是把zookeeper概念讲的最清楚的一篇文章" aria-hidden="true">#</a> 可能是把ZooKeeper概念讲的最清楚的一篇文章</h1><p>整理：沉默王二，戳<a href="https://mp.weixin.qq.com/s/-evZg0epRrOr1IwQ3GJ2Zg" target="_blank" rel="noopener noreferrer">转载链接<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，作者：月伴飞鱼，戳<a href="https://mp.weixin.qq.com/s/B2ngp0q5kdWsCNH8sw_5DA" target="_blank" rel="noopener noreferrer">原文链接<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>。</p><h2 id="一、基本介绍" tabindex="-1"><a class="header-anchor" href="#一、基本介绍" aria-hidden="true">#</a> 一、基本介绍</h2><p>Apache ZooKeeper 是由Apache Hadoop的子项目发展而来，为分布式应用提供高效且可靠的分布式协调服务。</p><p>在解决分布式数据一致性方面，ZK没有直接采用Paxos算法，而是采用了ZAB（ZooKeeper Atomic Broadcast）协议。 ZK可以提供诸如数据发布/订阅、负载均衡、命名服务、分布式协调/通知，集群管理，Master选举，分布式锁，分布式队列等功能。</p><p>「它具有以下特性：」</p><ul><li>「顺序一致性」：从一个客户端发起的事务请求，最终都会严格按照其发起顺序被应用到 Zookeeper 中；</li><li>「原子性」：要么所有应用，要么不应用；不存在部分机器应用了该事务，而「另一部分没有应用」的情况；</li><li>「单一视图」：所有客户端看到的服务端数据模型都是一致的，无论客户连接的是哪个ZK服务器；</li><li>「可靠性」：一旦服务端成功应用了一个事务，则其引起的改变会一直保留，直到被另外一个事务所更改；</li><li>「实时性」：一旦一个事务被成功应用后，Zookeeper 可以保证客户端立即可以读取到这个事务变更后的最新状态的数据（「一段时间」）。</li></ul><h2 id="二、数据模型" tabindex="-1"><a class="header-anchor" href="#二、数据模型" aria-hidden="true">#</a> 二、数据模型</h2><p>ZooKeeper 中的数据模型是一种树形结构，非常像电脑中的文件系统，有一个根文件夹，下面还有很多子文件夹。</p><ul><li><p>ZooKeeper的数据模型也具有一个固定的根节点<code>（/）</code>，我们可以在根节点下创建子节点，并在子节点下继续创建下一级节点。</p></li><li><p>ZooKeeper 树中的每一层级用斜杠<code>（/）</code>分隔开，且只能用绝对路径（如<code>get /work/task</code>）的方式查询 ZooKeeper 节点，而不能使用相对路径。</p></li></ul><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zookeeper/shujumoxing-1.png" alt=""></p><p><strong>「为什么 ZooKeeper 不能采用相对路径查找节点呢？」</strong></p><blockquote><p>❝</p><p>这是因为 ZooKeeper 大多是应用场景是定位数据模型上的节点，并在相关节点上进行操作。</p><p>❞</p></blockquote><p>像这种查找与给定值相等的记录问题最适合用散列来解决。</p><p>因此 ZooKeeper 在底层实现的时候，使用了一个 hashtable，即 <code>hashtableConcurrentHashMap&lt;String, DataNode&gt; nodes</code>，用节点的完整路径来作为 key 存储节点数据。</p><p>这样就大大提高了 ZooKeeper 的性能。</p><p><strong>「节点类型」</strong></p><p>ZooKeeper 中的数据节点也分为持久节点、临时节点和有序节点三种类型：</p><blockquote><p>❝</p><p>1、持久节点</p><p>❞</p></blockquote><p>一旦将节点创建为持久节点，该数据节点会一直存储在 ZooKeeper 服务器上，即使创建该节点的客户端与服务端的会话关闭了，该节点依然不会被删除。如果我们想删除持久节点，就要显式调用 delete 函数进行删除操作。</p><blockquote><p>❝</p><p>2、临时节点</p><p>❞</p></blockquote><p>如果将节点创建为临时节点，那么该节点数据不会一直存储在 ZooKeeper 服务器上。</p><p>当创建该临时节点的客户端会话因超时或发生异常而关闭时，该节点也相应在 ZooKeeper 服务器上被删除，同样，我们可以像删除持久节点一样主动删除临时节点。</p><p>在平时的开发中，我们可以利用临时节点的这一特性来做服务器集群内机器运行情况的统计，将集群设置为<code>/servers</code>节点，并为集群下的每台服务器创建一个临时节点<code>/servers/host</code>，当服务器下线时该节点自动被删除，最后统计临时节点个数就可以知道集群中的运行情况。</p><blockquote><p>❝</p><p>3、有序节点</p><p>❞</p></blockquote><p>节点有序是说在我们创建有序节点的时候，ZooKeeper 服务器会自动使用一个单调递增的数字作为后缀，追加到我们创建节点的后边。</p><p>例如一个客户端创建了一个路径为 <code>works/task-</code>的有序节点，那么 ZooKeeper 将会生成一个序号并追加到该节点的路径后，最后该节点的路径为<code>works/task-1</code>。</p><ul><li>通过这种方式我们可以直观的查看到节点的创建顺序。</li></ul><p>ZooKeeper 中的每个节点都维护有这些内容：一个二进制数组<code>（byte data[]）</code>，用来存储节点的数据、ACL 访问控制信息、子节点数据（因为临时节点不允许有子节点，所以其子节点字段为 null），除此之外每个数据节点还有一个记录自身状态信息的字段 stat。</p><p><strong>「节点的状态结构」</strong></p><p>执行<code>stat /zk_test</code>，可以看到控制台输出了一些信息，这些就是节点状态信息。</p><p>每一个节点都有一个自己的状态属性，记录了节点本身的一些信息：</p><table><thead><tr><th><strong>「状态属性」</strong></th><th><strong>「说明」</strong></th></tr></thead><tbody><tr><td>czxid</td><td>数据节点创建时的事务 ID</td></tr><tr><td>ctime</td><td>数据节点创建时的时间</td></tr><tr><td>mzxid</td><td>数据节点最后一次更新时的事务 ID</td></tr><tr><td>mtime</td><td>数据节点最后一次更新时的时间</td></tr><tr><td>pzxid</td><td>数据节点的子节点最后一次被修改时的事务 ID</td></tr><tr><td><strong>「cversion」</strong></td><td><strong>「子节点的版本」</strong></td></tr><tr><td><strong>「version」</strong></td><td><strong>「当前节点数据的版本」</strong></td></tr><tr><td><strong>「aversion」</strong></td><td><strong>「节点的 ACL 的版本」</strong></td></tr><tr><td>ephemeralOwner</td><td>如果节点是临时节点，则表示创建该节点的会话的 SessionID；如果节点是持久节点，则该属性值为 0</td></tr><tr><td>dataLength</td><td>数据内容的长度</td></tr><tr><td>numChildren</td><td>数据节点当前的子节点个数</td></tr></tbody></table><p><strong>「数据节点的版本」</strong></p><p>在 ZooKeeper 中为数据节点引入了版本的概念，每个数据节点有 3 种类型的版本信息，对数据节点的任何更新操作都会引起版本号的变化。</p><p>ZooKeeper 的版本信息表示的是对节点数据内容、子节点信息或者是 ACL 信息的修改次数。</p><h2 id="三、数据存储" tabindex="-1"><a class="header-anchor" href="#三、数据存储" aria-hidden="true">#</a> 三、数据存储</h2><p>从存储位置上来说，事务日志和数据快照一样，都存储在本地磁盘上；而从业务角度来讲，内存数据就是我们创建数据节点、添加监控等请求时直接操作的数据。</p><p>事务日志数据主要用于记录本地事务性会话操作，用于 ZooKeeper 集群服务器之间的数据同步。</p><p>事务快照则是将内存数据持久化到本地磁盘。</p><p>❝ 这里要注意的一点是，数据快照是每间隔一段时间才把内存数据存储到本地磁盘，因此数据并不会一直与内存数据保持一致。 ❞ 在单台 ZooKeeper 服务器运行过程中因为异常而关闭时，可能会出现数据丢失等情况。</p><p>「内存数据」</p><p>ZooKeeper 的数据模型可以看作一棵树形结构，而数据节点就是这棵树上的叶子节点。</p><p>从数据存储的角度看，ZooKeeper 的数据模型是存储在内存中的。</p><p>我们可以把 ZooKeeper 的数据模型看作是存储在内存中的数据库，而这个数据库不但存储数据的节点信息，还存储每个数据节点的 ACL 权限信息以及 stat 状态信息等。</p><p>而在底层实现中，ZooKeeper 数据模型是通过 DataTree 类来定义的。 DataTree 类定义了一个 ZooKeeper 数据的内存结构。</p><p>DataTree 的内部定义类 nodes 节点类型、root 根节点信息、子节点的 WatchManager 监控信息等数据模型中的相关信息。</p><p>可以说，一个 DataTree 类定义了 ZooKeeper 内存数据的逻辑结构。</p><p>「事务日志」</p><p>为了整个 ZooKeeper 集群中数据的一致性，Leader 服务器会向 ZooKeeper 集群中的其他角色服务发送数据同步信息，在接收到数据同步信息后， ZooKeeper 集群中的 Follow 和 Observer 服务器就会进行数据同步。</p><p>❝ 而这两种角色服务器所接收到的信息就是 Leader 服务器的事务日志。 ❞ 在接收到事务日志后，并在本地服务器上执行。这种数据同步的方式，避免了直接使用实际的业务数据，减少了网络传输的开销，提升了整个 ZooKeeper 集群的执行性能。</p><h2 id="四、watch机制" tabindex="-1"><a class="header-anchor" href="#四、watch机制" aria-hidden="true">#</a> 四、Watch机制</h2><p>ZooKeeper 的客户端可以通过 Watch 机制来订阅当服务器上某一节点的数据或状态发生变化时收到相应的通知；</p><p><strong>「如何实现：」</strong></p><p>我们可以通过向 ZooKeeper 客户端的构造方法中传递 Watcher 参数的方式实现：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>new ZooKeeper(String connectString, int sessionTimeout, Watcher watcher)
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>上面代码的意思是定义了一个了 ZooKeeper 客户端对象实例，并传入三个参数：</p><ul><li><p>connectString 服务端地址</p></li><li><p>sessionTimeout：超时时间</p></li><li><p>Watcher：监控事件</p></li></ul><p>这个 Watcher 将作为整个 ZooKeeper 会话期间的上下文 ，一直被保存在客户端 ZKWatchManager 的 defaultWatcher 中。</p><p>除此之外，ZooKeeper 客户端也可以通过 getData、exists 和 getChildren 三个接口来向 ZooKeeper 服务器注册 Watcher，从而方便地在不同的情况下添加 Watch 事件：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>getData(String path, Watcher watcher, Stat stat)
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>触发通知的条件：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zookeeper/watch-1.png" alt=""></p><p>上图中列出了客户端在不同会话状态下，相应的在服务器节点所能支持的事件类型。</p><ul><li>例如在客户端连接服务端的时候，可以对数据节点的创建、删除、数据变更、子节点的更新等操作进行监控。</li></ul><p><strong>「当服务端某一节点发生数据变更操作时，所有曾经设置了该节点监控事件的客户端都会收到服务器的通知吗？」</strong></p><p>答案是否定的，Watch 事件的触发机制取决于会话的连接状态和客户端注册事件的类型，所以当客户端会话状态或数据节点发生改变时，都会触发对应的 Watch 事件。</p><p><strong>「订阅发布场景实现」</strong></p><blockquote><p>❝</p><p>提到 ZooKeeper 的应用场景，你可能第一时间会想到最为典型的发布订阅功能。</p><p>❞</p></blockquote><p>发布订阅功能可以看作是一个一对多的关系，即一个服务或数据的发布者可以被多个不同的消费者调用。</p><p>一般一个发布订阅模式的数据交互可以分为消费者主动请求生产者信息的拉取模式，和生产者数据变更时主动推送给消费者的推送模式。</p><p>ZooKeeper 采用了两种模式结合的方式实现订阅发布功能。</p><blockquote><p>❝</p><p>下面我们来分析一个具体案例：</p><p>❞</p></blockquote><p>在系统开发的过程中会用到各种各样的配置信息，如数据库配置项、第三方接口、服务地址等，这些配置操作在我们开发过程中很容易完成，但是放到一个大规模的集群中配置起来就比较麻烦了。</p><p>通常这种集群中，我们可以用配置管理功能自动完成服务器配置信息的维护，利用ZooKeeper 的发布订阅功能就能解决这个问题。</p><p>我们可以把诸如数据库配置项这样的信息存储在 ZooKeeper 数据节点中。</p><p>如<code>/confs/data_item1</code>。</p><ul><li><p>服务器集群客户端对该节点添加 Watch 事件监控，当集群中的服务启动时，会读取该节点数据获取数据配置信息。</p></li><li><p>而当该节点数据发生变化时，ZooKeeper 服务器会发送 Watch 事件给各个客户端，集群中的客户端在接收到该通知后，重新读取节点的数据库配置信息。</p></li></ul><p>我们使用 Watch 机制实现了一个分布式环境下的配置管理功能，通过对 ZooKeeper 服务器节点添加数据变更事件，实现当数据库配置项信息变更后，集群中的各个客户端能接收到该变更事件的通知，并获取最新的配置信息。</p><blockquote><p>❝</p><p>要注意一点是，我们提到 Watch 具有一次性，所以当我们获得服务器通知后要再次添加 Watch 事件。</p><p>❞</p></blockquote><h2 id="五、会话机制" tabindex="-1"><a class="header-anchor" href="#五、会话机制" aria-hidden="true">#</a> 五、会话机制</h2><p>ZooKeeper 的工作方式一般是通过客户端向服务端发送请求而实现的。</p><p>而在一个请求的发送过程中，首先，客户端要与服务端进行连接，而一个连接就是一个会话。</p><blockquote><p>❝</p><p>在 ZooKeeper 中，一个会话可以看作是一个用于表示客户端与服务器端连接的数据结构 Session。</p><p>❞</p></blockquote><p>这个数据结构由三个部分组成：分别是会话 ID（sessionID）、会话超时时间（TimeOut）、会话关闭状态（isClosing）</p><ul><li><p>会话 ID：会话 ID 作为一个会话的标识符，当我们创建一次会话的时候，ZooKeeper 会自动为其分配一个唯一的 ID 编码。</p></li><li><p>会话超时时间：一般来说，一个会话的超时时间就是指一次会话从发起后到被服务器关闭的时长。而设置会话超时时间后，服务器会参考设置的超时时间，最终计算一个服务端自己的超时时间。而这个超时时间则是最终真正用于 ZooKeeper 中服务端用户会话管理的超时时间。</p></li><li><p>会话关闭状态：会话关闭 isClosing 状态属性字段表示一个会话是否已经关闭。如果服务器检查到一个会话已经因为超时等原因失效时， ZooKeeper 会在该会话的 isClosing 属性值标记为关闭，再之后就不对该会话进行操作了。</p></li></ul><p><strong>「会话状态」</strong></p><p>在 ZooKeeper 服务的运行过程中，会话会经历不同的状态变化。</p><p>这些状态包括：</p><blockquote><p>❝</p><p>正在连接（CONNECTING）、已经连接（CONNECTIED）、正在重新连接（RECONNECTING）、已经重新连接（RECONNECTED）、会话关闭（CLOSE）等。</p><p>❞</p></blockquote><p>当客户端开始创建一个与服务端的会话操作时，它的会话状态就会变成 CONNECTING，之后客户端会根据服务器地址列表中的服务器 IP 地址分别尝试进行连接。如果遇到一个 IP 地址可以连接到服务器，那么客户端会话状态将变为 CONNECTIED。</p><p>如果因为网络原因造成已经连接的客户端会话断开时，客户端会重新尝试连接服务端。而对应的客户端会话状态又变成 CONNECTING ，直到该会话连接到服务端最终又变成 CONNECTIED。</p><blockquote><p>❝</p><p>在 ZooKeeper 服务的整个运行过程中，会话状态经常会在 CONNECTING 与 CONNECTIED 之间进行切换。</p><p>❞</p></blockquote><p>最后，当出现超时或者客户端主动退出程序等情况时，客户端会话状态则会变为 CLOSE 状态。</p><p><strong>「会话异常」</strong></p><p>在 ZooKeeper 中，会话的超时异常包括客户端 readtimeout 异常和服务器端 sessionTimeout 异常。</p><ul><li>在我们平时的开发中，要明确这两个异常的不同之处在于一个是发生在客户端，而另一个是发生在服务端。</li></ul><p>而对于那些对 ZooKeeper 接触不深的开发人员来说，他们常常踩坑的地方在于，虽然设置了超时间，但是在实际服务运行的时候 ZooKeeper 并没有按照设置的超时时间来管理会话。</p><ul><li>这是因为 ZooKeeper 实际起作用的超时时间是通过客户端和服务端协商决定。</li></ul><p>ZooKeeper 客户端在和服务端建立连接的时候，会提交一个客户端设置的会话超时时间，而该超时时间会和服务端设置的最大超时时间和最小超时时间进行比对，如果正好在其允许的范围内，则采用客户端的超时时间管理会话。</p><p>如果大于或者小于服务端设置的超时时间，则采用服务端设置的值管理会话。</p><p><strong>「分桶策略」</strong></p><p>我们知道在 ZooKeeper 中为了保证一个会话的存活状态，客户端需要向服务器周期性地发送心跳信息。</p><ul><li>而客户端所发送的心跳信息可以是一个 ping 请求，也可以是一个普通的业务请求。</li></ul><p>ZooKeeper 服务端接收请求后，会更新会话的过期时间，来保证会话的存活状态。</p><ul><li>所以在 ZooKeeper 的会话管理中，最主要的工作就是管理会话的过期时间。</li></ul><blockquote><p>❝</p><p>ZooKeeper 中采用了独特的会话管理方式来管理会话的过期时间。</p><p>❞</p></blockquote><p>在 ZooKeeper 中，会话将按照不同的时间间隔进行划分，超时时间相近的会话将被放在同一个间隔区间中，这种方式避免了 ZooKeeper 对每一个会话进行检查，而是采用分批次的方式管理会话。</p><p>这就降低了会话管理的难度，因为每次小批量的处理会话过期也提高了会话处理的效率。</p><p><strong>「ZooKeeper 这种会话管理的好处？」</strong></p><p>ZooKeeper 这种分段的会话管理策略大大提高了计算会话过期的效率，如果是在一个实际生产环境中，一个大型的分布式系统往往具有很高的访问量。</p><p>而 ZooKeeper 作为其中的组件，对外提供服务往往要承担数千个客户端的访问，这其中就要对这几千个会话进行管理。</p><p>在这种场景下，要想通过对每一个会话进行管理和检查并不合适，所以采用将同一个时间段的会话进行统一管理，这样就大大提高了服务的运行效率。</p><p><strong>「底层实现」</strong></p><p>ZooKeeper 底层实现的原理，核心的一点就是过期队列这个数据结构。所有会话过期的相关操作都是围绕这个队列进行的。</p><ul><li>可以说 ZooKeeper 底层就是采用这个队列结构来管理会话过期的。</li></ul><p><strong>「一个会话过期队列是由若干个 bucket 组成的。」</strong></p><ul><li><p>bucket 是一个按照时间划分的区间。</p></li><li><p>在 ZooKeeper 中，通常以 expirationInterval 为单位进行时间区间的划分，它是 ZooKeeper 分桶策略中用于划分时间区间的最小单位。</p></li><li><p>在 ZooKeeper 中，一个过期队列由不同的 bucket 组成。</p></li><li><p>每个 bucket 中存放了在某一时间内过期的会话。</p></li></ul><p>将会话按照不同的过期时间段分别维护到过期队列之后，在 ZooKeeper 服务运行的过程中，具体的执行过程如下图所示。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zookeeper/huihuajizhi-1.png" alt=""></p><p>首先，ZooKeeper 服务会开启一个线程专门用来检索过期队列，找出要过期的 bucket，而 ZooKeeper 每次只会让一个 bucket 的会话过期，每当要进行会话过期操作时，ZooKeeper 会唤醒一个处于休眠状态的线程进行会话过期操作，之后会按照上面介绍的操作检索过期队列，取出过期的会话后会执行过期操作。</p><h2 id="六、acl权限" tabindex="-1"><a class="header-anchor" href="#六、acl权限" aria-hidden="true">#</a> 六、ACL权限</h2><p>ZooKeeper的ACL可针对znodes设置相应的权限信息。</p><p>一个 ACL 权限设置通常可以分为 3 部分，分别是：权限模式（Scheme）、授权对象（ID）、权限信息（Permission）。</p><p>最终组成一条例如scheme🆔permission格式的 ACL 请求信息。 「权限模式：Scheme」</p><p>ZooKeeper 的权限验证方式大体分为两种类型，一种是范围验证，另外一种是口令验证。</p><p>❝ 范围验证 ❞ 所谓的范围验证就是说 ZooKeeper 可以针对一个 IP 或者一段 IP 地址授予某种权限。</p><p>比如我们可以让一个 IP 地址为ip：192.168.0.11的机器对服务器上的某个数据节点具有写入的权限。</p><p>或者也可以通过ip:192.168.0.11/22给一段 IP 地址的机器赋权。</p><p>❝ 口令验证 ❞ 可以理解为用户名密码的方式，这是我们最熟悉也是日常生活中经常使用的模式，比如我们打开自己的电脑或者去银行取钱都需要提供相应的密码。</p><p>在 ZooKeeper 中这种验证方式是 Digest 认证，我们知道通过网络传输相对来说并不安全，所以绝不通过明文在网络发送密码也是程序设计中很重要的原则之一，而 Digest 这种认证方式首先在客户端传送username:password这种形式的权限表示符后，ZooKeeper 服务端会对密码部分使用 SHA-1 和 BASE64 算法进行加密，以保证安全性。</p><p>❝ Super 权限模式 ❞ 权限模式 Super 可以认为是一种特殊的 Digest 认证。</p><p>具有 Super 权限的客户端可以对 ZooKeeper 上的任意数据节点进行任意操作。</p><p>下面这段代码给出了 Digest 模式下客户端的调用方式。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>//创建节点
 create /digest_node1
@@ -80,6 +80,6 @@ addauth digest user:passwd
 java -cp &quot;$CLASSPATH&quot; org.apache.zookeeper.server.PurgeTxnLog 
 echo &quot;清理完成&quot; 
 </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>PurgeTxnLog 方式与 crontab 相比，使用起来更加容易而且也更加稳定安全，不过 crontab 方式更加灵活，我们可以根据不同的业务需求编写自己的清理逻辑。</p><h2 id="十一、实现分布式锁" tabindex="-1"><a class="header-anchor" href="#十一、实现分布式锁" aria-hidden="true">#</a> 十一、实现分布式锁</h2><p>分布式锁的目的是保证在分布式部署的应用集群中，多个服务在请求同一个方法或者同一个业务操作的情况下，对应业务逻辑只能被一台机器上的一个线程执行，避免出现并发问题。</p><blockquote><p>❝</p><p>实现分布式锁目前有三种流行方案，即基于数据库、Redis、ZooKeeper 的方案</p><p>❞</p></blockquote><p><strong>「方案一：」</strong></p><p>使用节点中的存储数据区域，ZK中节点存储数据的大小不能超过1M，但是只是存放一个标识是足够的，线程获得锁时，先检查该标识是否是无锁标识，若是可修改为占用标识，使用完再恢复为无锁标识</p><p><strong>「方案二：」</strong></p><p>使用子节点，每当有线程来请求锁的时候，便在锁的节点下创建一个子节点，子节点类型必须维护一个顺序，对子节点的自增序号进行排序，默认总是最小的子节点对应的线程获得锁，释放锁时删除对应子节点便可</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zookeeper/fenbushisuo-1.png" alt=""></p><p><strong>「死锁风险:」</strong></p><p>两种方案其实都是可行的，但是使用锁的时候一定要去规避死锁</p><ul><li><p>方案一看上去是没问题的，用的时候设置标识，用完清除标识，但是要是持有锁的线程发生了意外，释放锁的代码无法执行，锁就无法释放，其他线程就会一直等待锁，相关同步代码便无法执行</p></li><li><p>方案二也存在这个问题，但方案二可以利用ZK的临时顺序节点来解决这个问题，只要线程发生了异常导致程序中断，就会丢失与ZK的连接，ZK检测到该链接断开，就会自动删除该链接创建的临时节点，这样就可以达到即使占用锁的线程程序发生意外，也能保证锁正常释放的目的</p></li></ul><p><strong>「避免羊群效应」</strong></p><p>把锁请求者按照后缀数字进行排队，后缀数字小的锁请求者先获取锁。</p><p>如果所有的锁请求者都 watch 锁持有者，当代表锁请求者的 znode 被删除以后，所有的锁请求者都会通知到，但是只有一个锁请求者能拿到锁。这就是羊群效应。</p><blockquote><p>❝</p><p>为了避免羊群效应，每个锁请求者 watch 它前面的锁请求者。</p><p>❞</p></blockquote><p>每次锁被释放，只会有一个锁请求者 会被通知到。</p><p>这样做还让锁的分配具有公平性，锁定的分配遵循先到先得的原则。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zookeeper/fenbushisuo-2.png" alt=""></p><p><strong>「用 ZooKeeper 实现分布式锁的算法流程，根节点为 /lock：」</strong></p><ul><li><p>客户端连接 ZooKeeper，并<code>在/lock</code>下创建临时有序子节点，第一个客户端对应的子节点为<code>/lock/lock01/00000001</code>，第二个为 <code>/lock/lock01/00000002</code>；</p></li><li><p>其他客户端获取<code>/lock01</code>下的子节点列表，判断自己创建的子节点是否为当前列表中序号最小的子节点；</p></li><li><p>如果是则认为获得锁，执行业务代码，否则通过 watch 事件监听<code>/lock01</code>的子节点变更消息，获得变更通知后重复此步骤直至获得锁；</p></li><li><p>完成业务流程后，删除对应的子节点，释放分布式锁；</p></li></ul><p>在实际开发中，可以应用 Apache Curator 来快速实现分布式锁，Curator 是 Netflix 公司开源的一个 ZooKeeper 客户端，对 ZooKeeper 原生 API 做了抽象和封装。</p><h2 id="十二、实现分布式id" tabindex="-1"><a class="header-anchor" href="#十二、实现分布式id" aria-hidden="true">#</a> 十二、实现分布式ID</h2><p>我们可以通过 ZooKeeper 自身的客户端和服务器运行模式，来实现一个分布式网络环境下的 ID 请求和分发过程。</p><p>❝ 每个需要 ID 编码的业务服务器可以看作是 ZooKeeper 的客户端。ID 编码生成器可以作为 ZooKeeper 的服务端。 ❞ 客户端通过发送请求到 ZooKeeper 服务器，来获取编码信息，服务端接收到请求后，发送 ID 编码给客户端。</p><p>「实现原理：」</p><p>可以利用 ZooKeeper 数据模型中的顺序节点作为 ID 编码。</p><p>客户端通过调用 create 函数创建顺序节点。服务器成功创建节点后，会响应客户端请求，把创建好的节点信息发送给客户端。</p><p>客户端用数据节点名称作为 ID 编码，进行之后的本地业务操作。</p><p>利用 ZooKeeper 中的顺序节点特性，很容易使我们创建的 ID 编码具有有序的特性。并且我们也可以通过客户端传递节点的名称，根据不同的业务编码区分不同的业务系统，从而使编码的扩展能力更强。</p><p>❝ 虽然使用 ZooKeeper 的实现方式有这么多优点，但也会有一些潜在的问题。 ❞ 其中最主要的是，在定义编码的规则上还是强烈依赖于程序员自身的能力和对业务的深入理解。</p><p>很容易出现因为考虑不周，造成设置的规则在运行一段时间后，无法满足业务要求或者安全性不够等问题。</p><h2 id="十三、实现负载均衡" tabindex="-1"><a class="header-anchor" href="#十三、实现负载均衡" aria-hidden="true">#</a> 十三、实现负载均衡</h2><p><strong>「常见负载均衡算法」</strong></p><blockquote><p>❝</p><p>轮询法</p><p>❞</p></blockquote><p>轮询法是最为简单的负载均衡算法，当接收到来自网络中的客户端请求后，负载均衡服务器会按顺序逐个分配给后端服务。</p><p>比如集群中有 3 台服务器，分别是 server1、server2、server3，轮询法会按照 sever1、server2、server3 这个顺序依次分发会话请求给每个服务器。当第一次轮询结束后，会重新开始下一轮的循环。</p><blockquote><p>❝</p><p>随机法</p><p>❞</p></blockquote><p>随机算法是指负载均衡服务器在接收到来自客户端的请求后，会根据一定的随机算法选中后台集群中的一台服务器来处理这次会话请求。</p><p>不过，当集群中备选机器变的越来越多时，通过统计学我们可以知道每台机器被抽中的概率基本相等，因此随机算法的实际效果越来越趋近轮询算法。</p><blockquote><p>❝</p><p>原地址哈希法</p><p>❞</p></blockquote><p>原地址哈希算法的核心思想是根据客户端的 IP 地址进行哈希计算，用计算结果进行取模后，根据最终结果选择服务器地址列表中的一台机器，处理该条会话请求。</p><p>采用这种算法后，当同一 IP 的客户端再次访问服务端后，负载均衡服务器最终选举的还是上次处理该台机器会话请求的服务器，也就是每次都会分配同一台服务器给客户端。</p><blockquote><p>❝</p><p>加权轮询法</p><p>❞</p></blockquote><p>加权轮询的方式与轮询算法的方式很相似，唯一的不同在于选择机器的时候，不只是单纯按照顺序的方式选择，还根据机器的配置和性能高低有所侧重，配置性能好的机器往往首先分配。</p><blockquote><p>❝</p><p>加权随机法</p><p>❞</p></blockquote><p>加权随机法和我们上面提到的随机算法一样，在采用随机算法选举服务器的时候，会考虑系统性能作为权值条件。</p><blockquote><p>❝</p><p>最小连接数法</p><p>❞</p></blockquote><p>最小连接数算法是指，根据后台处理客户端的连接会话条数，计算应该把新会话分配给哪一台服务器。</p><p>一般认为，连接数越少的机器，在网络带宽和计算性能上都有很大优势，会作为最优先分配的对象。</p><p><strong>「利用 ZooKeeper 实现 负载均衡 算法」</strong></p><blockquote><p>❝</p><p>这里我们通过采用最小连接数算法，来确定究竟如何均衡地分配网络会话请求给后台客户端。</p><p>❞</p></blockquote><p>如下图所示，建立的 ZooKeeper 数据模型中 Severs 节点可以作为存储服务器列表的父节点。</p><p>在它下面创建 servers_host1、servers_host2、servers_host3等临时节点来存储集群中的服务器运行状态信息。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zookeeper/fuzaijunheng-1.png" alt=""></p><p>整个实现的过程如下图所示。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zookeeper/fuzaijunheng-2.png" alt=""></p><ul><li><p>首先，在接收到客户端的请求后，通过 getData 方法获取服务端 Severs 节点下的服务器列表，其中每个节点信息都存储有当前服务器的连接数。</p></li><li><p>通过判断选择最少的连接数作为当前会话的处理服务器，并通过 setData 方法将该节点连接数加 1。</p></li><li><p>最后，当客户端执行完毕，再调用 setData 方法将该节点信息减 1。</p></li><li><p>我们定义当服务器接收到会话请求后。在 ZooKeeper 服务端增加连接数的 addBlance 方法。</p></li><li><p>我们通过 readData 方法获取服务器最新的连接数，之后将该连接数加 1，再通过 writeData 方法将新的连接数信息写入到服务端对应节点信息中。</p></li><li><p>当服务器处理完该会话请求后，需要更新服务端相关节点的连接数。</p></li><li><p>具体的操作与 addBlance 方法基本一样，只是对获取的连接信息进行减一操作。</p></li></ul><p><strong>「这里注意：」</strong></p><p>我们日常用到的负载均衡器主要是选择后台处理的服务器，并给其分发请求。</p><blockquote><p>❝</p><p>而通过 ZooKeeper 实现的服务器，只提供了服务器的筛选工作。</p><p>❞</p></blockquote><p>在请求分发的过程中，还是通过负载算法计算出要访问的服务器，之后客户端自己连接该服务器，完成请求操作。</p><h2 id="十四、开源框架使用案例" tabindex="-1"><a class="header-anchor" href="#十四、开源框架使用案例" aria-hidden="true">#</a> 十四、开源框架使用案例</h2><p><strong>「Dubbo与ZooKeeper」</strong></p><p>Dubbo 是阿里巴巴开发的一套开源的技术框架，是一款高性能、轻量级的开源 Java RPC 框架。</p><p><strong>「用ZooKeeper做注册中心」</strong></p><p>在整个 Dubbo 框架的实现过程中，注册中心是其中最为关键的一点，它保证了整个 PRC 过程中服务对外的透明性。</p><p>而 Dubbo 的注册中心也是通过 ZooKeeper 来实现的。</p><p>如下图所示，在整个 Dubbo 服务的启动过程中，服务提供者会在启动时向 <code>/dubbo/com.foo.BarService/providers</code>目录写入自己的 URL 地址，这个操作可以看作是一个 ZooKeeper 客户端在 ZooKeeper 服务器的数据模型上创建一个数据节点。</p><p>服务消费者在启动时订阅 <code>/dubbo/com.foo.BarService/providers</code> 目录下的提供者 URL 地址，并向 <code>/dubbo/com.foo.BarService/consumers</code> 目录写入自己的 URL 地址。</p><p>该操作是通过 ZooKeeper 服务器在 /consumers 节点路径下创建一个子数据节点，然后再在请求会话中发起对 /providers 节点的 watch 监控</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zookeeper/shiyonganli-1.png" alt=""></p><p><strong>「Kafka与ZooKeeper」</strong></p><p><strong>「Zookeeper的作用」</strong></p><p>由于 Broker 服务器采用分布式集群的方式工作，那么在服务的运行过程中，难免出现某台机器因异常而关闭的状况。</p><p>为了保证整个 Kafka 集群的可用性，需要在系统中监控整个机器的运行情况。而 Kafka 可以通过 ZooKeeper 中的数据节点，将网络中机器的运行统计存储在数据模型中的 brokers 节点下。</p><p>在 Kafka 的 Topic 信息注册中也需要使用到 ZooKeeper ，在 Kafka 中同一个Topic 消息容器可以分成多个不同片，而这些分区既可以存在于一台 Broker 服务器中，也可以存在于不同的 Broker 服务器中。</p><p>而在 Kafka 集群中，每台 Broker 服务器又相对独立。</p><p>为了能够读取这些以分布式方式存储的分区信息，Kafka 会将这些分区信息在 Broker 服务器中的对应关系存储在 ZooKeeper 数据模型的 topic 节点上，每一个 topic 在 ZooKeeper 数据节点上都会以 <code>/brokers/topics/[topic]</code> 的形式存在。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/zookeeper/shiyonganli-2.png" alt=""></p><p>整理：沉默王二，戳<a href="https://mp.weixin.qq.com/s/-evZg0epRrOr1IwQ3GJ2Zg" target="_blank" rel="noopener noreferrer">转载链接<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>，作者：月伴飞鱼，戳<a 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